nfs4xdr.c 193.1 KB
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/*
 *  fs/nfs/nfs4xdr.c
 *
 *  Client-side XDR for NFSv4.
 *
 *  Copyright (c) 2002 The Regents of the University of Michigan.
 *  All rights reserved.
 *
 *  Kendrick Smith <kmsmith@umich.edu>
 *  Andy Adamson   <andros@umich.edu>
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 *
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 *  Redistribution and use in source and binary forms, with or without
 *  modification, are permitted provided that the following conditions
 *  are met:
 *
 *  1. Redistributions of source code must retain the above copyright
 *     notice, this list of conditions and the following disclaimer.
 *  2. Redistributions in binary form must reproduce the above copyright
 *     notice, this list of conditions and the following disclaimer in the
 *     documentation and/or other materials provided with the distribution.
 *  3. Neither the name of the University nor the names of its
 *     contributors may be used to endorse or promote products derived
 *     from this software without specific prior written permission.
 *
 *  THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
 *  WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
 *  MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 *  DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
 *  FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 *  CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 *  SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
 *  BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
 *  LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
 *  NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 *  SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

#include <linux/param.h>
#include <linux/time.h>
#include <linux/mm.h>
#include <linux/errno.h>
#include <linux/string.h>
#include <linux/in.h>
#include <linux/pagemap.h>
#include <linux/proc_fs.h>
#include <linux/kdev_t.h>
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#include <linux/module.h>
#include <linux/utsname.h>
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#include <linux/sunrpc/clnt.h>
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#include <linux/sunrpc/msg_prot.h>
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#include <linux/sunrpc/gss_api.h>
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#include <linux/nfs.h>
#include <linux/nfs4.h>
#include <linux/nfs_fs.h>
#include <linux/nfs_idmap.h>
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#include "nfs4_fs.h"
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#include "internal.h"
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#include "nfs4session.h"
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#include "pnfs.h"
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#include "netns.h"
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#define NFSDBG_FACILITY		NFSDBG_XDR

/* Mapping from NFS error code to "errno" error code. */
#define errno_NFSERR_IO		EIO

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static int nfs4_stat_to_errno(int);
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/* NFSv4 COMPOUND tags are only wanted for debugging purposes */
#ifdef DEBUG
#define NFS4_MAXTAGLEN		20
#else
#define NFS4_MAXTAGLEN		0
#endif

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/* lock,open owner id:
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 * we currently use size 2 (u64) out of (NFS4_OPAQUE_LIMIT  >> 2)
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 */
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#define open_owner_id_maxsz	(1 + 2 + 1 + 1 + 2)
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#define lock_owner_id_maxsz	(1 + 1 + 4)
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#define decode_lockowner_maxsz	(1 + XDR_QUADLEN(IDMAP_NAMESZ))
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#define compound_encode_hdr_maxsz	(3 + (NFS4_MAXTAGLEN >> 2))
#define compound_decode_hdr_maxsz	(3 + (NFS4_MAXTAGLEN >> 2))
#define op_encode_hdr_maxsz	(1)
#define op_decode_hdr_maxsz	(2)
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#define encode_stateid_maxsz	(XDR_QUADLEN(NFS4_STATEID_SIZE))
#define decode_stateid_maxsz	(XDR_QUADLEN(NFS4_STATEID_SIZE))
#define encode_verifier_maxsz	(XDR_QUADLEN(NFS4_VERIFIER_SIZE))
#define decode_verifier_maxsz	(XDR_QUADLEN(NFS4_VERIFIER_SIZE))
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#define encode_putfh_maxsz	(op_encode_hdr_maxsz + 1 + \
				(NFS4_FHSIZE >> 2))
#define decode_putfh_maxsz	(op_decode_hdr_maxsz)
#define encode_putrootfh_maxsz	(op_encode_hdr_maxsz)
#define decode_putrootfh_maxsz	(op_decode_hdr_maxsz)
#define encode_getfh_maxsz      (op_encode_hdr_maxsz)
#define decode_getfh_maxsz      (op_decode_hdr_maxsz + 1 + \
				((3+NFS4_FHSIZE) >> 2))
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#define nfs4_fattr_bitmap_maxsz 4
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#define encode_getattr_maxsz    (op_encode_hdr_maxsz + nfs4_fattr_bitmap_maxsz)
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#define nfs4_name_maxsz		(1 + ((3 + NFS4_MAXNAMLEN) >> 2))
#define nfs4_path_maxsz		(1 + ((3 + NFS4_MAXPATHLEN) >> 2))
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#define nfs4_owner_maxsz	(1 + XDR_QUADLEN(IDMAP_NAMESZ))
#define nfs4_group_maxsz	(1 + XDR_QUADLEN(IDMAP_NAMESZ))
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#ifdef CONFIG_NFS_V4_SECURITY_LABEL
/* PI(4 bytes) + LFS(4 bytes) + 1(for null terminator?) + MAXLABELLEN */
#define	nfs4_label_maxsz	(4 + 4 + 1 + XDR_QUADLEN(NFS4_MAXLABELLEN))
#define encode_readdir_space 24
#define encode_readdir_bitmask_sz 3
#else
#define	nfs4_label_maxsz	0
#define encode_readdir_space 20
#define encode_readdir_bitmask_sz 2
#endif
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/* We support only one layout type per file system */
#define decode_mdsthreshold_maxsz (1 + 1 + nfs4_fattr_bitmap_maxsz + 1 + 8)
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/* This is based on getfattr, which uses the most attributes: */
#define nfs4_fattr_value_maxsz	(1 + (1 + 2 + 2 + 4 + 2 + 1 + 1 + 2 + 2 + \
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				3 + 3 + 3 + nfs4_owner_maxsz + \
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				nfs4_group_maxsz + nfs4_label_maxsz + \
				 decode_mdsthreshold_maxsz))
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#define nfs4_fattr_maxsz	(nfs4_fattr_bitmap_maxsz + \
				nfs4_fattr_value_maxsz)
#define decode_getattr_maxsz    (op_decode_hdr_maxsz + nfs4_fattr_maxsz)
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#define encode_attrs_maxsz	(nfs4_fattr_bitmap_maxsz + \
				 1 + 2 + 1 + \
				nfs4_owner_maxsz + \
				nfs4_group_maxsz + \
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				nfs4_label_maxsz + \
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				4 + 4)
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#define encode_savefh_maxsz     (op_encode_hdr_maxsz)
#define decode_savefh_maxsz     (op_decode_hdr_maxsz)
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#define encode_restorefh_maxsz  (op_encode_hdr_maxsz)
#define decode_restorefh_maxsz  (op_decode_hdr_maxsz)
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#define encode_fsinfo_maxsz	(encode_getattr_maxsz)
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/* The 5 accounts for the PNFS attributes, and assumes that at most three
 * layout types will be returned.
 */
#define decode_fsinfo_maxsz	(op_decode_hdr_maxsz + \
				 nfs4_fattr_bitmap_maxsz + 4 + 8 + 5)
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#define encode_renew_maxsz	(op_encode_hdr_maxsz + 3)
#define decode_renew_maxsz	(op_decode_hdr_maxsz)
#define encode_setclientid_maxsz \
				(op_encode_hdr_maxsz + \
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				XDR_QUADLEN(NFS4_VERIFIER_SIZE) + \
				XDR_QUADLEN(NFS4_SETCLIENTID_NAMELEN) + \
				1 /* sc_prog */ + \
				XDR_QUADLEN(RPCBIND_MAXNETIDLEN) + \
				XDR_QUADLEN(RPCBIND_MAXUADDRLEN) + \
				1) /* sc_cb_ident */
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#define decode_setclientid_maxsz \
				(op_decode_hdr_maxsz + \
				2 + \
				1024) /* large value for CLID_INUSE */
#define encode_setclientid_confirm_maxsz \
				(op_encode_hdr_maxsz + \
				3 + (NFS4_VERIFIER_SIZE >> 2))
#define decode_setclientid_confirm_maxsz \
				(op_decode_hdr_maxsz)
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#define encode_lookup_maxsz	(op_encode_hdr_maxsz + nfs4_name_maxsz)
#define decode_lookup_maxsz	(op_decode_hdr_maxsz)
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#define encode_share_access_maxsz \
				(2)
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#define encode_createmode_maxsz	(1 + encode_attrs_maxsz + encode_verifier_maxsz)
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#define encode_opentype_maxsz	(1 + encode_createmode_maxsz)
#define encode_claim_null_maxsz	(1 + nfs4_name_maxsz)
#define encode_open_maxsz	(op_encode_hdr_maxsz + \
				2 + encode_share_access_maxsz + 2 + \
				open_owner_id_maxsz + \
				encode_opentype_maxsz + \
				encode_claim_null_maxsz)
#define decode_ace_maxsz	(3 + nfs4_owner_maxsz)
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#define decode_delegation_maxsz	(1 + decode_stateid_maxsz + 1 + \
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				decode_ace_maxsz)
#define decode_change_info_maxsz	(5)
#define decode_open_maxsz	(op_decode_hdr_maxsz + \
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				decode_stateid_maxsz + \
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				decode_change_info_maxsz + 1 + \
				nfs4_fattr_bitmap_maxsz + \
				decode_delegation_maxsz)
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#define encode_open_confirm_maxsz \
				(op_encode_hdr_maxsz + \
				 encode_stateid_maxsz + 1)
#define decode_open_confirm_maxsz \
				(op_decode_hdr_maxsz + \
				 decode_stateid_maxsz)
#define encode_open_downgrade_maxsz \
				(op_encode_hdr_maxsz + \
				 encode_stateid_maxsz + 1 + \
				 encode_share_access_maxsz)
#define decode_open_downgrade_maxsz \
				(op_decode_hdr_maxsz + \
				 decode_stateid_maxsz)
#define encode_close_maxsz	(op_encode_hdr_maxsz + \
				 1 + encode_stateid_maxsz)
#define decode_close_maxsz	(op_decode_hdr_maxsz + \
				 decode_stateid_maxsz)
#define encode_setattr_maxsz	(op_encode_hdr_maxsz + \
				 encode_stateid_maxsz + \
				 encode_attrs_maxsz)
#define decode_setattr_maxsz	(op_decode_hdr_maxsz + \
				 nfs4_fattr_bitmap_maxsz)
#define encode_read_maxsz	(op_encode_hdr_maxsz + \
				 encode_stateid_maxsz + 3)
#define decode_read_maxsz	(op_decode_hdr_maxsz + 2)
#define encode_readdir_maxsz	(op_encode_hdr_maxsz + \
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				 2 + encode_verifier_maxsz + 5 + \
				nfs4_label_maxsz)
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#define decode_readdir_maxsz	(op_decode_hdr_maxsz + \
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				 decode_verifier_maxsz + \
				nfs4_label_maxsz + nfs4_fattr_maxsz)
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#define encode_readlink_maxsz	(op_encode_hdr_maxsz)
#define decode_readlink_maxsz	(op_decode_hdr_maxsz + 1)
#define encode_write_maxsz	(op_encode_hdr_maxsz + \
				 encode_stateid_maxsz + 4)
#define decode_write_maxsz	(op_decode_hdr_maxsz + \
				 2 + decode_verifier_maxsz)
#define encode_commit_maxsz	(op_encode_hdr_maxsz + 3)
#define decode_commit_maxsz	(op_decode_hdr_maxsz + \
				 decode_verifier_maxsz)
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#define encode_remove_maxsz	(op_encode_hdr_maxsz + \
				nfs4_name_maxsz)
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#define decode_remove_maxsz	(op_decode_hdr_maxsz + \
				 decode_change_info_maxsz)
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#define encode_rename_maxsz	(op_encode_hdr_maxsz + \
				2 * nfs4_name_maxsz)
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#define decode_rename_maxsz	(op_decode_hdr_maxsz + \
				 decode_change_info_maxsz + \
				 decode_change_info_maxsz)
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#define encode_link_maxsz	(op_encode_hdr_maxsz + \
				nfs4_name_maxsz)
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#define decode_link_maxsz	(op_decode_hdr_maxsz + decode_change_info_maxsz)
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#define encode_lockowner_maxsz	(7)
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#define encode_lock_maxsz	(op_encode_hdr_maxsz + \
				 7 + \
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				 1 + encode_stateid_maxsz + 1 + \
				 encode_lockowner_maxsz)
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#define decode_lock_denied_maxsz \
				(8 + decode_lockowner_maxsz)
#define decode_lock_maxsz	(op_decode_hdr_maxsz + \
				 decode_lock_denied_maxsz)
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#define encode_lockt_maxsz	(op_encode_hdr_maxsz + 5 + \
				encode_lockowner_maxsz)
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#define decode_lockt_maxsz	(op_decode_hdr_maxsz + \
				 decode_lock_denied_maxsz)
#define encode_locku_maxsz	(op_encode_hdr_maxsz + 3 + \
				 encode_stateid_maxsz + \
				 4)
#define decode_locku_maxsz	(op_decode_hdr_maxsz + \
				 decode_stateid_maxsz)
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#define encode_release_lockowner_maxsz \
				(op_encode_hdr_maxsz + \
				 encode_lockowner_maxsz)
#define decode_release_lockowner_maxsz \
				(op_decode_hdr_maxsz)
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#define encode_access_maxsz	(op_encode_hdr_maxsz + 1)
#define decode_access_maxsz	(op_decode_hdr_maxsz + 2)
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#define encode_symlink_maxsz	(op_encode_hdr_maxsz + \
				1 + nfs4_name_maxsz + \
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				1 + \
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				nfs4_fattr_maxsz)
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#define decode_symlink_maxsz	(op_decode_hdr_maxsz + 8)
#define encode_create_maxsz	(op_encode_hdr_maxsz + \
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				1 + 2 + nfs4_name_maxsz + \
				encode_attrs_maxsz)
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#define decode_create_maxsz	(op_decode_hdr_maxsz + \
				decode_change_info_maxsz + \
				nfs4_fattr_bitmap_maxsz)
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#define encode_statfs_maxsz	(encode_getattr_maxsz)
#define decode_statfs_maxsz	(decode_getattr_maxsz)
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#define encode_delegreturn_maxsz (op_encode_hdr_maxsz + 4)
#define decode_delegreturn_maxsz (op_decode_hdr_maxsz)
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#define encode_getacl_maxsz	(encode_getattr_maxsz)
#define decode_getacl_maxsz	(op_decode_hdr_maxsz + \
				 nfs4_fattr_bitmap_maxsz + 1)
#define encode_setacl_maxsz	(op_encode_hdr_maxsz + \
				 encode_stateid_maxsz + 3)
#define decode_setacl_maxsz	(decode_setattr_maxsz)
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#define encode_fs_locations_maxsz \
				(encode_getattr_maxsz)
#define decode_fs_locations_maxsz \
				(0)
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#define encode_secinfo_maxsz	(op_encode_hdr_maxsz + nfs4_name_maxsz)
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#define decode_secinfo_maxsz	(op_decode_hdr_maxsz + 1 + ((NFS_MAX_SECFLAVORS * (16 + GSS_OID_MAX_LEN)) / 4))
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#if defined(CONFIG_NFS_V4_1)
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#define NFS4_MAX_MACHINE_NAME_LEN (64)
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#define IMPL_NAME_LIMIT (sizeof(utsname()->sysname) + sizeof(utsname()->release) + \
			 sizeof(utsname()->version) + sizeof(utsname()->machine) + 8)
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#define encode_exchange_id_maxsz (op_encode_hdr_maxsz + \
				encode_verifier_maxsz + \
				1 /* co_ownerid.len */ + \
				XDR_QUADLEN(NFS4_EXCHANGE_ID_LEN) + \
				1 /* flags */ + \
				1 /* spa_how */ + \
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				/* max is SP4_MACH_CRED (for now) */ + \
				1 + NFS4_OP_MAP_NUM_WORDS + \
				1 + NFS4_OP_MAP_NUM_WORDS + \
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				1 /* implementation id array of size 1 */ + \
				1 /* nii_domain */ + \
				XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + \
				1 /* nii_name */ + \
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				XDR_QUADLEN(IMPL_NAME_LIMIT) + \
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				3 /* nii_date */)
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#define decode_exchange_id_maxsz (op_decode_hdr_maxsz + \
				2 /* eir_clientid */ + \
				1 /* eir_sequenceid */ + \
				1 /* eir_flags */ + \
				1 /* spr_how */ + \
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				  /* max is SP4_MACH_CRED (for now) */ + \
				1 + NFS4_OP_MAP_NUM_WORDS + \
				1 + NFS4_OP_MAP_NUM_WORDS + \
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				2 /* eir_server_owner.so_minor_id */ + \
				/* eir_server_owner.so_major_id<> */ \
				XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 + \
				/* eir_server_scope<> */ \
				XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 + \
				1 /* eir_server_impl_id array length */ + \
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				1 /* nii_domain */ + \
				XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + \
				1 /* nii_name */ + \
				XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + \
				3 /* nii_date */)
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#define encode_channel_attrs_maxsz  (6 + 1 /* ca_rdma_ird.len (0) */)
#define decode_channel_attrs_maxsz  (6 + \
				     1 /* ca_rdma_ird.len */ + \
				     1 /* ca_rdma_ird */)
#define encode_create_session_maxsz  (op_encode_hdr_maxsz + \
				     2 /* csa_clientid */ + \
				     1 /* csa_sequence */ + \
				     1 /* csa_flags */ + \
				     encode_channel_attrs_maxsz + \
				     encode_channel_attrs_maxsz + \
				     1 /* csa_cb_program */ + \
				     1 /* csa_sec_parms.len (1) */ + \
				     1 /* cb_secflavor (AUTH_SYS) */ + \
				     1 /* stamp */ + \
				     1 /* machinename.len */ + \
				     XDR_QUADLEN(NFS4_MAX_MACHINE_NAME_LEN) + \
				     1 /* uid */ + \
				     1 /* gid */ + \
				     1 /* gids.len (0) */)
#define decode_create_session_maxsz  (op_decode_hdr_maxsz +	\
				     XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \
				     1 /* csr_sequence */ + \
				     1 /* csr_flags */ + \
				     decode_channel_attrs_maxsz + \
				     decode_channel_attrs_maxsz)
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#define encode_bind_conn_to_session_maxsz  (op_encode_hdr_maxsz + \
				     /* bctsa_sessid */ \
				     XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \
				     1 /* bctsa_dir */ + \
				     1 /* bctsa_use_conn_in_rdma_mode */)
#define decode_bind_conn_to_session_maxsz  (op_decode_hdr_maxsz +	\
				     /* bctsr_sessid */ \
				     XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \
				     1 /* bctsr_dir */ + \
				     1 /* bctsr_use_conn_in_rdma_mode */)
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#define encode_destroy_session_maxsz    (op_encode_hdr_maxsz + 4)
#define decode_destroy_session_maxsz    (op_decode_hdr_maxsz)
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#define encode_destroy_clientid_maxsz   (op_encode_hdr_maxsz + 2)
#define decode_destroy_clientid_maxsz   (op_decode_hdr_maxsz)
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#define encode_sequence_maxsz	(op_encode_hdr_maxsz + \
				XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + 4)
#define decode_sequence_maxsz	(op_decode_hdr_maxsz + \
				XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + 5)
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#define encode_reclaim_complete_maxsz	(op_encode_hdr_maxsz + 4)
#define decode_reclaim_complete_maxsz	(op_decode_hdr_maxsz + 4)
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#define encode_getdevicelist_maxsz (op_encode_hdr_maxsz + 4 + \
				encode_verifier_maxsz)
#define decode_getdevicelist_maxsz (op_decode_hdr_maxsz + \
				2 /* nfs_cookie4 gdlr_cookie */ + \
				decode_verifier_maxsz \
				  /* verifier4 gdlr_verifier */ + \
				1 /* gdlr_deviceid_list count */ + \
				XDR_QUADLEN(NFS4_PNFS_GETDEVLIST_MAXNUM * \
					    NFS4_DEVICEID4_SIZE) \
				  /* gdlr_deviceid_list */ + \
				1 /* bool gdlr_eof */)
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#define encode_getdeviceinfo_maxsz (op_encode_hdr_maxsz + 4 + \
				XDR_QUADLEN(NFS4_DEVICEID4_SIZE))
#define decode_getdeviceinfo_maxsz (op_decode_hdr_maxsz + \
				1 /* layout type */ + \
				1 /* opaque devaddr4 length */ + \
				  /* devaddr4 payload is read into page */ \
				1 /* notification bitmap length */ + \
				1 /* notification bitmap */)
#define encode_layoutget_maxsz	(op_encode_hdr_maxsz + 10 + \
				encode_stateid_maxsz)
#define decode_layoutget_maxsz	(op_decode_hdr_maxsz + 8 + \
				decode_stateid_maxsz + \
				XDR_QUADLEN(PNFS_LAYOUT_MAXSIZE))
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#define encode_layoutcommit_maxsz (op_encode_hdr_maxsz +          \
				2 /* offset */ + \
				2 /* length */ + \
				1 /* reclaim */ + \
				encode_stateid_maxsz + \
				1 /* new offset (true) */ + \
				2 /* last byte written */ + \
				1 /* nt_timechanged (false) */ + \
				1 /* layoutupdate4 layout type */ + \
				1 /* NULL filelayout layoutupdate4 payload */)
#define decode_layoutcommit_maxsz (op_decode_hdr_maxsz + 3)
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#define encode_layoutreturn_maxsz (8 + op_encode_hdr_maxsz + \
				encode_stateid_maxsz + \
				1 /* FIXME: opaque lrf_body always empty at the moment */)
#define decode_layoutreturn_maxsz (op_decode_hdr_maxsz + \
				1 + decode_stateid_maxsz)
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#define encode_secinfo_no_name_maxsz (op_encode_hdr_maxsz + 1)
#define decode_secinfo_no_name_maxsz decode_secinfo_maxsz
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#define encode_test_stateid_maxsz	(op_encode_hdr_maxsz + 2 + \
					 XDR_QUADLEN(NFS4_STATEID_SIZE))
#define decode_test_stateid_maxsz	(op_decode_hdr_maxsz + 2 + 1)
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#define encode_free_stateid_maxsz	(op_encode_hdr_maxsz + 1 + \
					 XDR_QUADLEN(NFS4_STATEID_SIZE))
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#define decode_free_stateid_maxsz	(op_decode_hdr_maxsz)
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#else /* CONFIG_NFS_V4_1 */
#define encode_sequence_maxsz	0
#define decode_sequence_maxsz	0
#endif /* CONFIG_NFS_V4_1 */

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#define NFS4_enc_compound_sz	(1024)  /* XXX: large enough? */
#define NFS4_dec_compound_sz	(1024)  /* XXX: large enough? */
#define NFS4_enc_read_sz	(compound_encode_hdr_maxsz + \
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				encode_sequence_maxsz + \
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				encode_putfh_maxsz + \
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				encode_read_maxsz)
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#define NFS4_dec_read_sz	(compound_decode_hdr_maxsz + \
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				decode_sequence_maxsz + \
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				decode_putfh_maxsz + \
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				decode_read_maxsz)
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#define NFS4_enc_readlink_sz	(compound_encode_hdr_maxsz + \
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				encode_sequence_maxsz + \
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				encode_putfh_maxsz + \
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				encode_readlink_maxsz)
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#define NFS4_dec_readlink_sz	(compound_decode_hdr_maxsz + \
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				decode_sequence_maxsz + \
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				decode_putfh_maxsz + \
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				decode_readlink_maxsz)
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#define NFS4_enc_readdir_sz	(compound_encode_hdr_maxsz + \
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				encode_sequence_maxsz + \
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				encode_putfh_maxsz + \
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				encode_readdir_maxsz)
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#define NFS4_dec_readdir_sz	(compound_decode_hdr_maxsz + \
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				decode_sequence_maxsz + \
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				decode_putfh_maxsz + \
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				decode_readdir_maxsz)
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#define NFS4_enc_write_sz	(compound_encode_hdr_maxsz + \
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				encode_sequence_maxsz + \
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				encode_putfh_maxsz + \
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				encode_write_maxsz + \
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				encode_getattr_maxsz)
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#define NFS4_dec_write_sz	(compound_decode_hdr_maxsz + \
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				decode_sequence_maxsz + \
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				decode_putfh_maxsz + \
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				decode_write_maxsz + \
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				decode_getattr_maxsz)
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#define NFS4_enc_commit_sz	(compound_encode_hdr_maxsz + \
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				encode_sequence_maxsz + \
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				encode_putfh_maxsz + \
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				encode_commit_maxsz)
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#define NFS4_dec_commit_sz	(compound_decode_hdr_maxsz + \
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				decode_sequence_maxsz + \
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				decode_putfh_maxsz + \
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				decode_commit_maxsz)
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#define NFS4_enc_open_sz        (compound_encode_hdr_maxsz + \
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				encode_sequence_maxsz + \
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				encode_putfh_maxsz + \
				encode_open_maxsz + \
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				encode_access_maxsz + \
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				encode_getfh_maxsz + \
				encode_getattr_maxsz)
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#define NFS4_dec_open_sz        (compound_decode_hdr_maxsz + \
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				decode_sequence_maxsz + \
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				decode_putfh_maxsz + \
				decode_open_maxsz + \
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				decode_access_maxsz + \
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				decode_getfh_maxsz + \
				decode_getattr_maxsz)
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#define NFS4_enc_open_confirm_sz \
				(compound_encode_hdr_maxsz + \
				 encode_putfh_maxsz + \
				 encode_open_confirm_maxsz)
#define NFS4_dec_open_confirm_sz \
				(compound_decode_hdr_maxsz + \
				 decode_putfh_maxsz + \
				 decode_open_confirm_maxsz)
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#define NFS4_enc_open_noattr_sz	(compound_encode_hdr_maxsz + \
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					encode_sequence_maxsz + \
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					encode_putfh_maxsz + \
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					encode_open_maxsz + \
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					encode_access_maxsz + \
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					encode_getattr_maxsz)
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#define NFS4_dec_open_noattr_sz	(compound_decode_hdr_maxsz + \
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					decode_sequence_maxsz + \
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					decode_putfh_maxsz + \
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					decode_open_maxsz + \
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					decode_access_maxsz + \
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					decode_getattr_maxsz)
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#define NFS4_enc_open_downgrade_sz \
				(compound_encode_hdr_maxsz + \
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				 encode_sequence_maxsz + \
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				 encode_putfh_maxsz + \
				 encode_open_downgrade_maxsz + \
				 encode_getattr_maxsz)
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#define NFS4_dec_open_downgrade_sz \
				(compound_decode_hdr_maxsz + \
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				 decode_sequence_maxsz + \
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				 decode_putfh_maxsz + \
				 decode_open_downgrade_maxsz + \
				 decode_getattr_maxsz)
#define NFS4_enc_close_sz	(compound_encode_hdr_maxsz + \
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				 encode_sequence_maxsz + \
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				 encode_putfh_maxsz + \
				 encode_close_maxsz + \
				 encode_getattr_maxsz)
#define NFS4_dec_close_sz	(compound_decode_hdr_maxsz + \
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				 decode_sequence_maxsz + \
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				 decode_putfh_maxsz + \
				 decode_close_maxsz + \
				 decode_getattr_maxsz)
#define NFS4_enc_setattr_sz	(compound_encode_hdr_maxsz + \
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				 encode_sequence_maxsz + \
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				 encode_putfh_maxsz + \
				 encode_setattr_maxsz + \
				 encode_getattr_maxsz)
#define NFS4_dec_setattr_sz	(compound_decode_hdr_maxsz + \
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				 decode_sequence_maxsz + \
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				 decode_putfh_maxsz + \
				 decode_setattr_maxsz + \
				 decode_getattr_maxsz)
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#define NFS4_enc_fsinfo_sz	(compound_encode_hdr_maxsz + \
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				encode_sequence_maxsz + \
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				encode_putfh_maxsz + \
				encode_fsinfo_maxsz)
#define NFS4_dec_fsinfo_sz	(compound_decode_hdr_maxsz + \
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				decode_sequence_maxsz + \
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				decode_putfh_maxsz + \
				decode_fsinfo_maxsz)
#define NFS4_enc_renew_sz	(compound_encode_hdr_maxsz + \
				encode_renew_maxsz)
#define NFS4_dec_renew_sz	(compound_decode_hdr_maxsz + \
				decode_renew_maxsz)
#define NFS4_enc_setclientid_sz	(compound_encode_hdr_maxsz + \
				encode_setclientid_maxsz)
#define NFS4_dec_setclientid_sz	(compound_decode_hdr_maxsz + \
				decode_setclientid_maxsz)
#define NFS4_enc_setclientid_confirm_sz \
				(compound_encode_hdr_maxsz + \
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				encode_setclientid_confirm_maxsz)
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#define NFS4_dec_setclientid_confirm_sz \
				(compound_decode_hdr_maxsz + \
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				decode_setclientid_confirm_maxsz)
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#define NFS4_enc_lock_sz        (compound_encode_hdr_maxsz + \
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				encode_sequence_maxsz + \
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				encode_putfh_maxsz + \
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				encode_lock_maxsz)
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#define NFS4_dec_lock_sz        (compound_decode_hdr_maxsz + \
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				decode_sequence_maxsz + \
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				decode_putfh_maxsz + \
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				decode_lock_maxsz)
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#define NFS4_enc_lockt_sz       (compound_encode_hdr_maxsz + \
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				encode_sequence_maxsz + \
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				encode_putfh_maxsz + \
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				encode_lockt_maxsz)
#define NFS4_dec_lockt_sz       (compound_decode_hdr_maxsz + \
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				 decode_sequence_maxsz + \
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				 decode_putfh_maxsz + \
				 decode_lockt_maxsz)
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#define NFS4_enc_locku_sz       (compound_encode_hdr_maxsz + \
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				encode_sequence_maxsz + \
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				encode_putfh_maxsz + \
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				encode_locku_maxsz)
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#define NFS4_dec_locku_sz       (compound_decode_hdr_maxsz + \
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				decode_sequence_maxsz + \
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				decode_putfh_maxsz + \
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				decode_locku_maxsz)
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#define NFS4_enc_release_lockowner_sz \
				(compound_encode_hdr_maxsz + \
				 encode_lockowner_maxsz)
#define NFS4_dec_release_lockowner_sz \
				(compound_decode_hdr_maxsz + \
				 decode_lockowner_maxsz)
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#define NFS4_enc_access_sz	(compound_encode_hdr_maxsz + \
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				encode_sequence_maxsz + \
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				encode_putfh_maxsz + \
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				encode_access_maxsz + \
				encode_getattr_maxsz)
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#define NFS4_dec_access_sz	(compound_decode_hdr_maxsz + \
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				decode_sequence_maxsz + \
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				decode_putfh_maxsz + \
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				decode_access_maxsz + \
				decode_getattr_maxsz)
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#define NFS4_enc_getattr_sz	(compound_encode_hdr_maxsz + \
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				encode_sequence_maxsz + \
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				encode_putfh_maxsz + \
				encode_getattr_maxsz)
#define NFS4_dec_getattr_sz	(compound_decode_hdr_maxsz + \
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				decode_sequence_maxsz + \
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				decode_putfh_maxsz + \
				decode_getattr_maxsz)
#define NFS4_enc_lookup_sz	(compound_encode_hdr_maxsz + \
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				encode_sequence_maxsz + \
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				encode_putfh_maxsz + \
				encode_lookup_maxsz + \
				encode_getattr_maxsz + \
				encode_getfh_maxsz)
#define NFS4_dec_lookup_sz	(compound_decode_hdr_maxsz + \
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				decode_sequence_maxsz + \
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				decode_putfh_maxsz + \
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				decode_lookup_maxsz + \
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				decode_getattr_maxsz + \
				decode_getfh_maxsz)
#define NFS4_enc_lookup_root_sz (compound_encode_hdr_maxsz + \
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				encode_sequence_maxsz + \
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				encode_putrootfh_maxsz + \
				encode_getattr_maxsz + \
				encode_getfh_maxsz)
#define NFS4_dec_lookup_root_sz (compound_decode_hdr_maxsz + \
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				decode_sequence_maxsz + \
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				decode_putrootfh_maxsz + \
				decode_getattr_maxsz + \
				decode_getfh_maxsz)
#define NFS4_enc_remove_sz	(compound_encode_hdr_maxsz + \
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				encode_sequence_maxsz + \
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				encode_putfh_maxsz + \
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				encode_remove_maxsz)
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#define NFS4_dec_remove_sz	(compound_decode_hdr_maxsz + \
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				decode_sequence_maxsz + \
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				decode_putfh_maxsz + \
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				decode_remove_maxsz)
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#define NFS4_enc_rename_sz	(compound_encode_hdr_maxsz + \
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				encode_sequence_maxsz + \
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				encode_putfh_maxsz + \
				encode_savefh_maxsz + \
				encode_putfh_maxsz + \
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				encode_rename_maxsz)
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#define NFS4_dec_rename_sz	(compound_decode_hdr_maxsz + \
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				decode_sequence_maxsz + \
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				decode_putfh_maxsz + \
				decode_savefh_maxsz + \
				decode_putfh_maxsz + \
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				decode_rename_maxsz)
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#define NFS4_enc_link_sz	(compound_encode_hdr_maxsz + \
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				encode_sequence_maxsz + \
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				encode_putfh_maxsz + \
				encode_savefh_maxsz + \
				encode_putfh_maxsz + \
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				encode_link_maxsz + \
				encode_restorefh_maxsz + \
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				encode_getattr_maxsz)
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#define NFS4_dec_link_sz	(compound_decode_hdr_maxsz + \
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				decode_sequence_maxsz + \
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				decode_putfh_maxsz + \
				decode_savefh_maxsz + \
				decode_putfh_maxsz + \
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				decode_link_maxsz + \
				decode_restorefh_maxsz + \
				decode_getattr_maxsz)
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#define NFS4_enc_symlink_sz	(compound_encode_hdr_maxsz + \
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				encode_sequence_maxsz + \
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				encode_putfh_maxsz + \
				encode_symlink_maxsz + \
				encode_getattr_maxsz + \
				encode_getfh_maxsz)
#define NFS4_dec_symlink_sz	(compound_decode_hdr_maxsz + \
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				decode_sequence_maxsz + \
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				decode_putfh_maxsz + \
				decode_symlink_maxsz + \
				decode_getattr_maxsz + \
				decode_getfh_maxsz)
#define NFS4_enc_create_sz	(compound_encode_hdr_maxsz + \
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				encode_sequence_maxsz + \
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				encode_putfh_maxsz + \
				encode_create_maxsz + \
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				encode_getfh_maxsz + \
				encode_getattr_maxsz)
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#define NFS4_dec_create_sz	(compound_decode_hdr_maxsz + \
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				decode_sequence_maxsz + \
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				decode_putfh_maxsz + \
				decode_create_maxsz + \
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				decode_getfh_maxsz + \
				decode_getattr_maxsz)
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#define NFS4_enc_pathconf_sz	(compound_encode_hdr_maxsz + \
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				encode_sequence_maxsz + \
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				encode_putfh_maxsz + \
				encode_getattr_maxsz)
#define NFS4_dec_pathconf_sz	(compound_decode_hdr_maxsz + \
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				decode_sequence_maxsz + \
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				decode_putfh_maxsz + \
				decode_getattr_maxsz)
#define NFS4_enc_statfs_sz	(compound_encode_hdr_maxsz + \
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				encode_sequence_maxsz + \
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				encode_putfh_maxsz + \
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				encode_statfs_maxsz)
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#define NFS4_dec_statfs_sz	(compound_decode_hdr_maxsz + \
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				decode_sequence_maxsz + \
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				decode_putfh_maxsz + \
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				decode_statfs_maxsz)
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#define NFS4_enc_server_caps_sz (compound_encode_hdr_maxsz + \
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				encode_sequence_maxsz + \
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				encode_putfh_maxsz + \
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				encode_getattr_maxsz)
#define NFS4_dec_server_caps_sz (compound_decode_hdr_maxsz + \
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				decode_sequence_maxsz + \
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				decode_putfh_maxsz + \
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				decode_getattr_maxsz)
#define NFS4_enc_delegreturn_sz	(compound_encode_hdr_maxsz + \
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				encode_sequence_maxsz + \
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				encode_putfh_maxsz + \
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				encode_delegreturn_maxsz + \
				encode_getattr_maxsz)
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#define NFS4_dec_delegreturn_sz (compound_decode_hdr_maxsz + \
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				decode_sequence_maxsz + \
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				decode_delegreturn_maxsz + \
				decode_getattr_maxsz)
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#define NFS4_enc_getacl_sz	(compound_encode_hdr_maxsz + \
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				encode_sequence_maxsz + \
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				encode_putfh_maxsz + \
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				encode_getacl_maxsz)
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#define NFS4_dec_getacl_sz	(compound_decode_hdr_maxsz + \
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				decode_sequence_maxsz + \
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				decode_putfh_maxsz + \
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				decode_getacl_maxsz)
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#define NFS4_enc_setacl_sz	(compound_encode_hdr_maxsz + \
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				encode_sequence_maxsz + \
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				encode_putfh_maxsz + \
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				encode_setacl_maxsz)
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#define NFS4_dec_setacl_sz	(compound_decode_hdr_maxsz + \
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				decode_sequence_maxsz + \
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				decode_putfh_maxsz + \
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				decode_setacl_maxsz)
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#define NFS4_enc_fs_locations_sz \
				(compound_encode_hdr_maxsz + \
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				 encode_sequence_maxsz + \
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				 encode_putfh_maxsz + \
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				 encode_lookup_maxsz + \
				 encode_fs_locations_maxsz)
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#define NFS4_dec_fs_locations_sz \
				(compound_decode_hdr_maxsz + \
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				 decode_sequence_maxsz + \
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				 decode_putfh_maxsz + \
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				 decode_lookup_maxsz + \
				 decode_fs_locations_maxsz)
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#define NFS4_enc_secinfo_sz 	(compound_encode_hdr_maxsz + \
				encode_sequence_maxsz + \
				encode_putfh_maxsz + \
				encode_secinfo_maxsz)
#define NFS4_dec_secinfo_sz	(compound_decode_hdr_maxsz + \
				decode_sequence_maxsz + \
				decode_putfh_maxsz + \
				decode_secinfo_maxsz)
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#if defined(CONFIG_NFS_V4_1)
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#define NFS4_enc_bind_conn_to_session_sz \
				(compound_encode_hdr_maxsz + \
				 encode_bind_conn_to_session_maxsz)
#define NFS4_dec_bind_conn_to_session_sz \
				(compound_decode_hdr_maxsz + \
				 decode_bind_conn_to_session_maxsz)
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#define NFS4_enc_exchange_id_sz \
				(compound_encode_hdr_maxsz + \
				 encode_exchange_id_maxsz)
#define NFS4_dec_exchange_id_sz \
				(compound_decode_hdr_maxsz + \
				 decode_exchange_id_maxsz)
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#define NFS4_enc_create_session_sz \
				(compound_encode_hdr_maxsz + \
				 encode_create_session_maxsz)
#define NFS4_dec_create_session_sz \
				(compound_decode_hdr_maxsz + \
				 decode_create_session_maxsz)
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#define NFS4_enc_destroy_session_sz	(compound_encode_hdr_maxsz + \
					 encode_destroy_session_maxsz)
#define NFS4_dec_destroy_session_sz	(compound_decode_hdr_maxsz + \
					 decode_destroy_session_maxsz)
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#define NFS4_enc_destroy_clientid_sz	(compound_encode_hdr_maxsz + \
					 encode_destroy_clientid_maxsz)
#define NFS4_dec_destroy_clientid_sz	(compound_decode_hdr_maxsz + \
					 decode_destroy_clientid_maxsz)
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#define NFS4_enc_sequence_sz \
				(compound_decode_hdr_maxsz + \
				 encode_sequence_maxsz)
#define NFS4_dec_sequence_sz \
				(compound_decode_hdr_maxsz + \
				 decode_sequence_maxsz)
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#define NFS4_enc_get_lease_time_sz	(compound_encode_hdr_maxsz + \
					 encode_sequence_maxsz + \
					 encode_putrootfh_maxsz + \
					 encode_fsinfo_maxsz)
#define NFS4_dec_get_lease_time_sz	(compound_decode_hdr_maxsz + \
					 decode_sequence_maxsz + \
					 decode_putrootfh_maxsz + \
					 decode_fsinfo_maxsz)
795 796 797 798 799 800
#define NFS4_enc_reclaim_complete_sz	(compound_encode_hdr_maxsz + \
					 encode_sequence_maxsz + \
					 encode_reclaim_complete_maxsz)
#define NFS4_dec_reclaim_complete_sz	(compound_decode_hdr_maxsz + \
					 decode_sequence_maxsz + \
					 decode_reclaim_complete_maxsz)
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#define NFS4_enc_getdevicelist_sz (compound_encode_hdr_maxsz + \
				encode_sequence_maxsz + \
				encode_putfh_maxsz + \
				encode_getdevicelist_maxsz)
#define NFS4_dec_getdevicelist_sz (compound_decode_hdr_maxsz + \
				decode_sequence_maxsz + \
				decode_putfh_maxsz + \
				decode_getdevicelist_maxsz)
809 810 811 812 813 814 815 816 817 818 819 820 821 822
#define NFS4_enc_getdeviceinfo_sz (compound_encode_hdr_maxsz +    \
				encode_sequence_maxsz +\
				encode_getdeviceinfo_maxsz)
#define NFS4_dec_getdeviceinfo_sz (compound_decode_hdr_maxsz +    \
				decode_sequence_maxsz + \
				decode_getdeviceinfo_maxsz)
#define NFS4_enc_layoutget_sz	(compound_encode_hdr_maxsz + \
				encode_sequence_maxsz + \
				encode_putfh_maxsz +        \
				encode_layoutget_maxsz)
#define NFS4_dec_layoutget_sz	(compound_decode_hdr_maxsz + \
				decode_sequence_maxsz + \
				decode_putfh_maxsz +        \
				decode_layoutget_maxsz)
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#define NFS4_enc_layoutcommit_sz (compound_encode_hdr_maxsz + \
				encode_sequence_maxsz +\
				encode_putfh_maxsz + \
				encode_layoutcommit_maxsz + \
				encode_getattr_maxsz)
#define NFS4_dec_layoutcommit_sz (compound_decode_hdr_maxsz + \
				decode_sequence_maxsz + \
				decode_putfh_maxsz + \
				decode_layoutcommit_maxsz + \
				decode_getattr_maxsz)
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#define NFS4_enc_layoutreturn_sz (compound_encode_hdr_maxsz + \
				encode_sequence_maxsz + \
				encode_putfh_maxsz + \
				encode_layoutreturn_maxsz)
#define NFS4_dec_layoutreturn_sz (compound_decode_hdr_maxsz + \
				decode_sequence_maxsz + \
				decode_putfh_maxsz + \
				decode_layoutreturn_maxsz)
841 842 843 844 845 846 847 848
#define NFS4_enc_secinfo_no_name_sz	(compound_encode_hdr_maxsz + \
					encode_sequence_maxsz + \
					encode_putrootfh_maxsz +\
					encode_secinfo_no_name_maxsz)
#define NFS4_dec_secinfo_no_name_sz	(compound_decode_hdr_maxsz + \
					decode_sequence_maxsz + \
					decode_putrootfh_maxsz + \
					decode_secinfo_no_name_maxsz)
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#define NFS4_enc_test_stateid_sz	(compound_encode_hdr_maxsz + \
					 encode_sequence_maxsz + \
					 encode_test_stateid_maxsz)
#define NFS4_dec_test_stateid_sz	(compound_decode_hdr_maxsz + \
					 decode_sequence_maxsz + \
					 decode_test_stateid_maxsz)
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#define NFS4_enc_free_stateid_sz	(compound_encode_hdr_maxsz + \
					 encode_sequence_maxsz + \
					 encode_free_stateid_maxsz)
#define NFS4_dec_free_stateid_sz	(compound_decode_hdr_maxsz + \
					 decode_sequence_maxsz + \
					 decode_free_stateid_maxsz)
861 862 863 864 865 866 867 868 869 870 871 872 873

const u32 nfs41_maxwrite_overhead = ((RPC_MAX_HEADER_WITH_AUTH +
				      compound_encode_hdr_maxsz +
				      encode_sequence_maxsz +
				      encode_putfh_maxsz +
				      encode_getattr_maxsz) *
				     XDR_UNIT);

const u32 nfs41_maxread_overhead = ((RPC_MAX_HEADER_WITH_AUTH +
				     compound_decode_hdr_maxsz +
				     decode_sequence_maxsz +
				     decode_putfh_maxsz) *
				    XDR_UNIT);
874 875 876 877 878 879

const u32 nfs41_maxgetdevinfo_overhead = ((RPC_MAX_REPHEADER_WITH_AUTH +
					   compound_decode_hdr_maxsz +
					   decode_sequence_maxsz) *
					  XDR_UNIT);
EXPORT_SYMBOL_GPL(nfs41_maxgetdevinfo_overhead);
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#endif /* CONFIG_NFS_V4_1 */
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882 883 884 885 886 887 888 889 890 891 892
static const umode_t nfs_type2fmt[] = {
	[NF4BAD] = 0,
	[NF4REG] = S_IFREG,
	[NF4DIR] = S_IFDIR,
	[NF4BLK] = S_IFBLK,
	[NF4CHR] = S_IFCHR,
	[NF4LNK] = S_IFLNK,
	[NF4SOCK] = S_IFSOCK,
	[NF4FIFO] = S_IFIFO,
	[NF4ATTRDIR] = 0,
	[NF4NAMEDATTR] = 0,
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};

struct compound_hdr {
	int32_t		status;
	uint32_t	nops;
898
	__be32 *	nops_p;
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	uint32_t	taglen;
	char *		tag;
901
	uint32_t	replen;		/* expected reply words */
902
	u32		minorversion;
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};

905 906 907 908 909 910
static __be32 *reserve_space(struct xdr_stream *xdr, size_t nbytes)
{
	__be32 *p = xdr_reserve_space(xdr, nbytes);
	BUG_ON(!p);
	return p;
}
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912 913 914 915 916 917 918 919
static void encode_opaque_fixed(struct xdr_stream *xdr, const void *buf, size_t len)
{
	__be32 *p;

	p = xdr_reserve_space(xdr, len);
	xdr_encode_opaque_fixed(p, buf, len);
}

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static void encode_string(struct xdr_stream *xdr, unsigned int len, const char *str)
{
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	__be32 *p;
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924
	p = reserve_space(xdr, 4 + len);
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	xdr_encode_opaque(p, str, len);
}

928 929 930 931 932 933 934 935
static void encode_uint32(struct xdr_stream *xdr, u32 n)
{
	__be32 *p;

	p = reserve_space(xdr, 4);
	*p = cpu_to_be32(n);
}

936 937 938 939 940 941 942 943
static void encode_uint64(struct xdr_stream *xdr, u64 n)
{
	__be32 *p;

	p = reserve_space(xdr, 8);
	xdr_encode_hyper(p, n);
}

944 945 946 947 948 949
static void encode_nfs4_seqid(struct xdr_stream *xdr,
		const struct nfs_seqid *seqid)
{
	encode_uint32(xdr, seqid->sequence->counter);
}

950 951 952
static void encode_compound_hdr(struct xdr_stream *xdr,
				struct rpc_rqst *req,
				struct compound_hdr *hdr)
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{
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	__be32 *p;
955
	struct rpc_auth *auth = req->rq_cred->cr_auth;
956 957 958 959 960

	/* initialize running count of expected bytes in reply.
	 * NOTE: the replied tag SHOULD be the same is the one sent,
	 * but this is not required as a MUST for the server to do so. */
	hdr->replen = RPC_REPHDRSIZE + auth->au_rslack + 3 + hdr->taglen;
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962
	WARN_ON_ONCE(hdr->taglen > NFS4_MAXTAGLEN);
963 964
	encode_string(xdr, hdr->taglen, hdr->tag);
	p = reserve_space(xdr, 8);
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	*p++ = cpu_to_be32(hdr->minorversion);
966
	hdr->nops_p = p;
967
	*p = cpu_to_be32(hdr->nops);
968 969
}

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static void encode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 op,
		uint32_t replen,
		struct compound_hdr *hdr)
{
	encode_uint32(xdr, op);
	hdr->nops++;
	hdr->replen += replen;
}

979 980
static void encode_nops(struct compound_hdr *hdr)
{
981
	WARN_ON_ONCE(hdr->nops > NFS4_MAX_OPS);
982
	*hdr->nops_p = htonl(hdr->nops);
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}

985 986
static void encode_nfs4_stateid(struct xdr_stream *xdr, const nfs4_stateid *stateid)
{
987
	encode_opaque_fixed(xdr, stateid, NFS4_STATEID_SIZE);
988 989
}

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static void encode_nfs4_verifier(struct xdr_stream *xdr, const nfs4_verifier *verf)
{
992
	encode_opaque_fixed(xdr, verf->data, NFS4_VERIFIER_SIZE);
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}

995 996 997
static void encode_attrs(struct xdr_stream *xdr, const struct iattr *iap,
				const struct nfs4_label *label,
				const struct nfs_server *server)
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{
	char owner_name[IDMAP_NAMESZ];
	char owner_group[IDMAP_NAMESZ];
	int owner_namelen = 0;
	int owner_grouplen = 0;
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	__be32 *p;
1004 1005 1006 1007
	unsigned i;
	uint32_t len = 0;
	uint32_t bmval_len;
	uint32_t bmval[3] = { 0 };
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	/*
	 * We reserve enough space to write the entire attribute buffer at once.
	 * In the worst-case, this would be
1012 1013
	 * 16(bitmap) + 4(attrlen) + 8(size) + 4(mode) + 4(atime) + 4(mtime)
	 * = 40 bytes, plus any contribution from variable-length fields
1014
	 *            such as owner/group.
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	 */
1016 1017
	if (iap->ia_valid & ATTR_SIZE) {
		bmval[0] |= FATTR4_WORD0_SIZE;
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		len += 8;
1019 1020 1021
	}
	if (iap->ia_valid & ATTR_MODE) {
		bmval[1] |= FATTR4_WORD1_MODE;
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		len += 4;
1023
	}
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	if (iap->ia_valid & ATTR_UID) {
1025
		owner_namelen = nfs_map_uid_to_name(server, iap->ia_uid, owner_name, IDMAP_NAMESZ);
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		if (owner_namelen < 0) {
1027
			dprintk("nfs: couldn't resolve uid %d to string\n",
1028
					from_kuid(&init_user_ns, iap->ia_uid));
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			/* XXX */
			strcpy(owner_name, "nobody");
			owner_namelen = sizeof("nobody") - 1;
			/* goto out; */
		}
1034
		bmval[1] |= FATTR4_WORD1_OWNER;
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		len += 4 + (XDR_QUADLEN(owner_namelen) << 2);
	}
	if (iap->ia_valid & ATTR_GID) {
1038
		owner_grouplen = nfs_map_gid_to_group(server, iap->ia_gid, owner_group, IDMAP_NAMESZ);
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		if (owner_grouplen < 0) {
1040
			dprintk("nfs: couldn't resolve gid %d to string\n",
1041
					from_kgid(&init_user_ns, iap->ia_gid));
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			strcpy(owner_group, "nobody");
			owner_grouplen = sizeof("nobody") - 1;
			/* goto out; */
		}
1046
		bmval[1] |= FATTR4_WORD1_OWNER_GROUP;
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		len += 4 + (XDR_QUADLEN(owner_grouplen) << 2);
	}
1049 1050
	if (iap->ia_valid & ATTR_ATIME_SET) {
		bmval[1] |= FATTR4_WORD1_TIME_ACCESS_SET;
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		len += 16;
1052 1053
	} else if (iap->ia_valid & ATTR_ATIME) {
		bmval[1] |= FATTR4_WORD1_TIME_ACCESS_SET;
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		len += 4;
1055 1056 1057
	}
	if (iap->ia_valid & ATTR_MTIME_SET) {
		bmval[1] |= FATTR4_WORD1_TIME_MODIFY_SET;
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		len += 16;
1059 1060
	} else if (iap->ia_valid & ATTR_MTIME) {
		bmval[1] |= FATTR4_WORD1_TIME_MODIFY_SET;
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		len += 4;
1062
	}
1063 1064
	if (label) {
		len += 4 + 4 + 4 + (XDR_QUADLEN(label->len) << 2);
1065
		bmval[2] |= FATTR4_WORD2_SECURITY_LABEL;
1066 1067
	}

1068 1069 1070 1071 1072 1073 1074 1075
	if (bmval[2] != 0)
		bmval_len = 3;
	else if (bmval[1] != 0)
		bmval_len = 2;
	else
		bmval_len = 1;

	p = reserve_space(xdr, 4 + (bmval_len << 2) + 4 + len);
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1077
	*p++ = cpu_to_be32(bmval_len);
1078 1079 1080
	for (i = 0; i < bmval_len; i++)
		*p++ = cpu_to_be32(bmval[i]);
	*p++ = cpu_to_be32(len);
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1082
	if (bmval[0] & FATTR4_WORD0_SIZE)
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		p = xdr_encode_hyper(p, iap->ia_size);
1084
	if (bmval[1] & FATTR4_WORD1_MODE)
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		*p++ = cpu_to_be32(iap->ia_mode & S_IALLUGO);
1086
	if (bmval[1] & FATTR4_WORD1_OWNER)
1087
		p = xdr_encode_opaque(p, owner_name, owner_namelen);
1088
	if (bmval[1] & FATTR4_WORD1_OWNER_GROUP)
1089
		p = xdr_encode_opaque(p, owner_group, owner_grouplen);
1090 1091 1092 1093 1094 1095 1096
	if (bmval[1] & FATTR4_WORD1_TIME_ACCESS_SET) {
		if (iap->ia_valid & ATTR_ATIME_SET) {
			*p++ = cpu_to_be32(NFS4_SET_TO_CLIENT_TIME);
			p = xdr_encode_hyper(p, (s64)iap->ia_atime.tv_sec);
			*p++ = cpu_to_be32(iap->ia_atime.tv_nsec);
		} else
			*p++ = cpu_to_be32(NFS4_SET_TO_SERVER_TIME);
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	}
1098 1099 1100 1101 1102 1103 1104
	if (bmval[1] & FATTR4_WORD1_TIME_MODIFY_SET) {
		if (iap->ia_valid & ATTR_MTIME_SET) {
			*p++ = cpu_to_be32(NFS4_SET_TO_CLIENT_TIME);
			p = xdr_encode_hyper(p, (s64)iap->ia_mtime.tv_sec);
			*p++ = cpu_to_be32(iap->ia_mtime.tv_nsec);
		} else
			*p++ = cpu_to_be32(NFS4_SET_TO_SERVER_TIME);
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	}
1106
	if (bmval[2] & FATTR4_WORD2_SECURITY_LABEL) {
1107 1108 1109 1110 1111
		*p++ = cpu_to_be32(label->lfs);
		*p++ = cpu_to_be32(label->pi);
		*p++ = cpu_to_be32(label->len);
		p = xdr_encode_opaque_fixed(p, label->label, label->len);
	}
1112

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/* out: */
}

1116
static void encode_access(struct xdr_stream *xdr, u32 access, struct compound_hdr *hdr)
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1117
{
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	encode_op_hdr(xdr, OP_ACCESS, decode_access_maxsz, hdr);
	encode_uint32(xdr, access);
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}

1122
static void encode_close(struct xdr_stream *xdr, const struct nfs_closeargs *arg, struct compound_hdr *hdr)
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1123
{
T
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1124
	encode_op_hdr(xdr, OP_CLOSE, decode_close_maxsz, hdr);
1125
	encode_nfs4_seqid(xdr, arg->seqid);
1126
	encode_nfs4_stateid(xdr, arg->stateid);
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}

1129
static void encode_commit(struct xdr_stream *xdr, const struct nfs_commitargs *args, struct compound_hdr *hdr)
L
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1130
{
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1131
	__be32 *p;
1132

T
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1133 1134
	encode_op_hdr(xdr, OP_COMMIT, decode_commit_maxsz, hdr);
	p = reserve_space(xdr, 12);
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1135
	p = xdr_encode_hyper(p, args->offset);
1136
	*p = cpu_to_be32(args->count);
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1137 1138
}

1139
static void encode_create(struct xdr_stream *xdr, const struct nfs4_create_arg *create, struct compound_hdr *hdr)
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1140
{
A
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1141
	__be32 *p;
1142

T
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1143 1144
	encode_op_hdr(xdr, OP_CREATE, decode_create_maxsz, hdr);
	encode_uint32(xdr, create->ftype);
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1145 1146 1147

	switch (create->ftype) {
	case NF4LNK:
1148
		p = reserve_space(xdr, 4);
1149
		*p = cpu_to_be32(create->u.symlink.len);
1150
		xdr_write_pages(xdr, create->u.symlink.pages, 0, create->u.symlink.len);
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1151 1152 1153
		break;

	case NF4BLK: case NF4CHR:
1154
		p = reserve_space(xdr, 8);
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		*p++ = cpu_to_be32(create->u.device.specdata1);
1156
		*p = cpu_to_be32(create->u.device.specdata2);
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		break;

	default:
		break;
	}

1163
	encode_string(xdr, create->name->len, create->name->name);
1164
	encode_attrs(xdr, create->attrs, create->label, create->server);
L
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1165 1166
}

1167
static void encode_getattr_one(struct xdr_stream *xdr, uint32_t bitmap, struct compound_hdr *hdr)
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1168
{
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1169
	__be32 *p;
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1170

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1171 1172
	encode_op_hdr(xdr, OP_GETATTR, decode_getattr_maxsz, hdr);
	p = reserve_space(xdr, 8);
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1173
	*p++ = cpu_to_be32(1);
1174
	*p = cpu_to_be32(bitmap);
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1175 1176
}

1177
static void encode_getattr_two(struct xdr_stream *xdr, uint32_t bm0, uint32_t bm1, struct compound_hdr *hdr)
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1178
{
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Andy Adamson 已提交
1179
	__be32 *p;
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1180

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1181 1182
	encode_op_hdr(xdr, OP_GETATTR, decode_getattr_maxsz, hdr);
	p = reserve_space(xdr, 12);
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1183 1184
	*p++ = cpu_to_be32(2);
	*p++ = cpu_to_be32(bm0);
1185
	*p = cpu_to_be32(bm1);
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1186 1187
}

1188 1189 1190 1191 1192 1193 1194
static void
encode_getattr_three(struct xdr_stream *xdr,
		     uint32_t bm0, uint32_t bm1, uint32_t bm2,
		     struct compound_hdr *hdr)
{
	__be32 *p;

T
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1195
	encode_op_hdr(xdr, OP_GETATTR, decode_getattr_maxsz, hdr);
1196 1197 1198 1199 1200 1201 1202 1203 1204 1205 1206 1207 1208 1209 1210 1211 1212 1213
	if (bm2) {
		p = reserve_space(xdr, 16);
		*p++ = cpu_to_be32(3);
		*p++ = cpu_to_be32(bm0);
		*p++ = cpu_to_be32(bm1);
		*p = cpu_to_be32(bm2);
	} else if (bm1) {
		p = reserve_space(xdr, 12);
		*p++ = cpu_to_be32(2);
		*p++ = cpu_to_be32(bm0);
		*p = cpu_to_be32(bm1);
	} else {
		p = reserve_space(xdr, 8);
		*p++ = cpu_to_be32(1);
		*p = cpu_to_be32(bm0);
	}
}

1214
static void encode_getfattr(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
L
Linus Torvalds 已提交
1215
{
1216 1217 1218 1219
	encode_getattr_three(xdr, bitmask[0] & nfs4_fattr_bitmap[0],
			   bitmask[1] & nfs4_fattr_bitmap[1],
			   bitmask[2] & nfs4_fattr_bitmap[2],
			   hdr);
L
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1220 1221
}

1222
static void encode_getfattr_open(struct xdr_stream *xdr, const u32 *bitmask,
1223
				 const u32 *open_bitmap,
1224 1225 1226
				 struct compound_hdr *hdr)
{
	encode_getattr_three(xdr,
1227 1228 1229
			     bitmask[0] & open_bitmap[0],
			     bitmask[1] & open_bitmap[1],
			     bitmask[2] & open_bitmap[2],
1230 1231 1232
			     hdr);
}

1233
static void encode_fsinfo(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
L
Linus Torvalds 已提交
1234
{
1235 1236 1237 1238 1239
	encode_getattr_three(xdr,
			     bitmask[0] & nfs4_fsinfo_bitmap[0],
			     bitmask[1] & nfs4_fsinfo_bitmap[1],
			     bitmask[2] & nfs4_fsinfo_bitmap[2],
			     hdr);
L
Linus Torvalds 已提交
1240 1241
}

1242
static void encode_fs_locations(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
1243
{
1244 1245
	encode_getattr_two(xdr, bitmask[0] & nfs4_fs_locations_bitmap[0],
			   bitmask[1] & nfs4_fs_locations_bitmap[1], hdr);
1246 1247
}

1248
static void encode_getfh(struct xdr_stream *xdr, struct compound_hdr *hdr)
L
Linus Torvalds 已提交
1249
{
T
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1250
	encode_op_hdr(xdr, OP_GETFH, decode_getfh_maxsz, hdr);
L
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1251 1252
}

1253
static void encode_link(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
L
Linus Torvalds 已提交
1254
{
T
Trond Myklebust 已提交
1255
	encode_op_hdr(xdr, OP_LINK, decode_link_maxsz, hdr);
1256
	encode_string(xdr, name->len, name->name);
L
Linus Torvalds 已提交
1257 1258
}

T
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1259 1260
static inline int nfs4_lock_type(struct file_lock *fl, int block)
{
1261
	if (fl->fl_type == F_RDLCK)
T
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1262 1263 1264 1265 1266 1267 1268 1269 1270 1271 1272
		return block ? NFS4_READW_LT : NFS4_READ_LT;
	return block ? NFS4_WRITEW_LT : NFS4_WRITE_LT;
}

static inline uint64_t nfs4_lock_length(struct file_lock *fl)
{
	if (fl->fl_end == OFFSET_MAX)
		return ~(uint64_t)0;
	return fl->fl_end - fl->fl_start + 1;
}

1273 1274 1275 1276
static void encode_lockowner(struct xdr_stream *xdr, const struct nfs_lowner *lowner)
{
	__be32 *p;

1277
	p = reserve_space(xdr, 32);
1278
	p = xdr_encode_hyper(p, lowner->clientid);
1279
	*p++ = cpu_to_be32(20);
1280
	p = xdr_encode_opaque_fixed(p, "lock id:", 8);
1281
	*p++ = cpu_to_be32(lowner->s_dev);
1282 1283 1284
	xdr_encode_hyper(p, lowner->id);
}

L
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1285 1286 1287 1288
/*
 * opcode,type,reclaim,offset,length,new_lock_owner = 32
 * open_seqid,open_stateid,lock_seqid,lock_owner.clientid, lock_owner.id = 40
 */
1289
static void encode_lock(struct xdr_stream *xdr, const struct nfs_lock_args *args, struct compound_hdr *hdr)
L
Linus Torvalds 已提交
1290
{
A
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1291
	__be32 *p;
L
Linus Torvalds 已提交
1292

T
Trond Myklebust 已提交
1293 1294
	encode_op_hdr(xdr, OP_LOCK, decode_lock_maxsz, hdr);
	p = reserve_space(xdr, 28);
B
Benny Halevy 已提交
1295 1296
	*p++ = cpu_to_be32(nfs4_lock_type(args->fl, args->block));
	*p++ = cpu_to_be32(args->reclaim);
B
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1297 1298
	p = xdr_encode_hyper(p, args->fl->fl_start);
	p = xdr_encode_hyper(p, nfs4_lock_length(args->fl));
1299
	*p = cpu_to_be32(args->new_lock_owner);
T
Trond Myklebust 已提交
1300
	if (args->new_lock_owner){
1301
		encode_nfs4_seqid(xdr, args->open_seqid);
1302
		encode_nfs4_stateid(xdr, args->open_stateid);
1303
		encode_nfs4_seqid(xdr, args->lock_seqid);
1304
		encode_lockowner(xdr, &args->lock_owner);
L
Linus Torvalds 已提交
1305 1306
	}
	else {
1307
		encode_nfs4_stateid(xdr, args->lock_stateid);
1308
		encode_nfs4_seqid(xdr, args->lock_seqid);
L
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1309 1310 1311
	}
}

1312
static void encode_lockt(struct xdr_stream *xdr, const struct nfs_lockt_args *args, struct compound_hdr *hdr)
L
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1313
{
A
Al Viro 已提交
1314
	__be32 *p;
L
Linus Torvalds 已提交
1315

T
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1316 1317
	encode_op_hdr(xdr, OP_LOCKT, decode_lockt_maxsz, hdr);
	p = reserve_space(xdr, 20);
B
Benny Halevy 已提交
1318
	*p++ = cpu_to_be32(nfs4_lock_type(args->fl, 0));
B
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1319 1320
	p = xdr_encode_hyper(p, args->fl->fl_start);
	p = xdr_encode_hyper(p, nfs4_lock_length(args->fl));
1321
	encode_lockowner(xdr, &args->lock_owner);
L
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1322 1323
}

1324
static void encode_locku(struct xdr_stream *xdr, const struct nfs_locku_args *args, struct compound_hdr *hdr)
L
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1325
{
A
Al Viro 已提交
1326
	__be32 *p;
L
Linus Torvalds 已提交
1327

T
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1328 1329
	encode_op_hdr(xdr, OP_LOCKU, decode_locku_maxsz, hdr);
	encode_uint32(xdr, nfs4_lock_type(args->fl, 0));
1330
	encode_nfs4_seqid(xdr, args->seqid);
1331 1332
	encode_nfs4_stateid(xdr, args->stateid);
	p = reserve_space(xdr, 16);
B
Benny Halevy 已提交
1333
	p = xdr_encode_hyper(p, args->fl->fl_start);
1334
	xdr_encode_hyper(p, nfs4_lock_length(args->fl));
L
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1335 1336
}

1337 1338
static void encode_release_lockowner(struct xdr_stream *xdr, const struct nfs_lowner *lowner, struct compound_hdr *hdr)
{
T
Trond Myklebust 已提交
1339
	encode_op_hdr(xdr, OP_RELEASE_LOCKOWNER, decode_release_lockowner_maxsz, hdr);
1340 1341 1342
	encode_lockowner(xdr, lowner);
}

1343
static void encode_lookup(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
L
Linus Torvalds 已提交
1344
{
T
Trond Myklebust 已提交
1345
	encode_op_hdr(xdr, OP_LOOKUP, decode_lookup_maxsz, hdr);
1346
	encode_string(xdr, name->len, name->name);
L
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1347 1348
}

1349
static void encode_share_access(struct xdr_stream *xdr, fmode_t fmode)
L
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1350
{
A
Al Viro 已提交
1351
	__be32 *p;
L
Linus Torvalds 已提交
1352

1353
	p = reserve_space(xdr, 8);
1354
	switch (fmode & (FMODE_READ|FMODE_WRITE)) {
A
Andy Adamson 已提交
1355
	case FMODE_READ:
B
Benny Halevy 已提交
1356
		*p++ = cpu_to_be32(NFS4_SHARE_ACCESS_READ);
A
Andy Adamson 已提交
1357 1358
		break;
	case FMODE_WRITE:
B
Benny Halevy 已提交
1359
		*p++ = cpu_to_be32(NFS4_SHARE_ACCESS_WRITE);
A
Andy Adamson 已提交
1360 1361
		break;
	case FMODE_READ|FMODE_WRITE:
B
Benny Halevy 已提交
1362
		*p++ = cpu_to_be32(NFS4_SHARE_ACCESS_BOTH);
A
Andy Adamson 已提交
1363 1364
		break;
	default:
B
Benny Halevy 已提交
1365
		*p++ = cpu_to_be32(0);
L
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1366
	}
1367
	*p = cpu_to_be32(0);		/* for linux, share_deny = 0 always */
L
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1368 1369 1370 1371
}

static inline void encode_openhdr(struct xdr_stream *xdr, const struct nfs_openargs *arg)
{
A
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1372
	__be32 *p;
L
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1373 1374 1375 1376
 /*
 * opcode 4, seqid 4, share_access 4, share_deny 4, clientid 8, ownerlen 4,
 * owner 4 = 32
 */
1377
	encode_nfs4_seqid(xdr, arg->seqid);
1378
	encode_share_access(xdr, arg->fmode);
1379
	p = reserve_space(xdr, 36);
B
Benny Halevy 已提交
1380
	p = xdr_encode_hyper(p, arg->clientid);
1381
	*p++ = cpu_to_be32(24);
B
Benny Halevy 已提交
1382
	p = xdr_encode_opaque_fixed(p, "open id:", 8);
1383
	*p++ = cpu_to_be32(arg->server->s_dev);
1384 1385
	*p++ = cpu_to_be32(arg->id.uniquifier);
	xdr_encode_hyper(p, arg->id.create_time);
L
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1386 1387 1388 1389
}

static inline void encode_createmode(struct xdr_stream *xdr, const struct nfs_openargs *arg)
{
1390
	struct iattr dummy;
A
Al Viro 已提交
1391
	__be32 *p;
L
Linus Torvalds 已提交
1392

1393
	p = reserve_space(xdr, 4);
1394 1395
	switch(arg->createmode) {
	case NFS4_CREATE_UNCHECKED:
1396
		*p = cpu_to_be32(NFS4_CREATE_UNCHECKED);
1397
		encode_attrs(xdr, arg->u.attrs, arg->label, arg->server);
A
Andy Adamson 已提交
1398
		break;
1399 1400
	case NFS4_CREATE_GUARDED:
		*p = cpu_to_be32(NFS4_CREATE_GUARDED);
1401
		encode_attrs(xdr, arg->u.attrs, arg->label, arg->server);
1402 1403 1404 1405 1406 1407 1408 1409 1410
		break;
	case NFS4_CREATE_EXCLUSIVE:
		*p = cpu_to_be32(NFS4_CREATE_EXCLUSIVE);
		encode_nfs4_verifier(xdr, &arg->u.verifier);
		break;
	case NFS4_CREATE_EXCLUSIVE4_1:
		*p = cpu_to_be32(NFS4_CREATE_EXCLUSIVE4_1);
		encode_nfs4_verifier(xdr, &arg->u.verifier);
		dummy.ia_valid = 0;
1411
		encode_attrs(xdr, &dummy, arg->label, arg->server);
L
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1412 1413 1414 1415 1416
	}
}

static void encode_opentype(struct xdr_stream *xdr, const struct nfs_openargs *arg)
{
A
Al Viro 已提交
1417
	__be32 *p;
L
Linus Torvalds 已提交
1418

1419
	p = reserve_space(xdr, 4);
L
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1420
	switch (arg->open_flags & O_CREAT) {
A
Andy Adamson 已提交
1421
	case 0:
1422
		*p = cpu_to_be32(NFS4_OPEN_NOCREATE);
A
Andy Adamson 已提交
1423 1424
		break;
	default:
1425
		*p = cpu_to_be32(NFS4_OPEN_CREATE);
A
Andy Adamson 已提交
1426
		encode_createmode(xdr, arg);
L
Linus Torvalds 已提交
1427 1428 1429
	}
}

1430
static inline void encode_delegation_type(struct xdr_stream *xdr, fmode_t delegation_type)
L
Linus Torvalds 已提交
1431
{
A
Al Viro 已提交
1432
	__be32 *p;
L
Linus Torvalds 已提交
1433

1434
	p = reserve_space(xdr, 4);
L
Linus Torvalds 已提交
1435
	switch (delegation_type) {
A
Andy Adamson 已提交
1436
	case 0:
1437
		*p = cpu_to_be32(NFS4_OPEN_DELEGATE_NONE);
A
Andy Adamson 已提交
1438 1439
		break;
	case FMODE_READ:
1440
		*p = cpu_to_be32(NFS4_OPEN_DELEGATE_READ);
A
Andy Adamson 已提交
1441 1442
		break;
	case FMODE_WRITE|FMODE_READ:
1443
		*p = cpu_to_be32(NFS4_OPEN_DELEGATE_WRITE);
A
Andy Adamson 已提交
1444 1445 1446
		break;
	default:
		BUG();
L
Linus Torvalds 已提交
1447 1448 1449 1450 1451
	}
}

static inline void encode_claim_null(struct xdr_stream *xdr, const struct qstr *name)
{
A
Al Viro 已提交
1452
	__be32 *p;
L
Linus Torvalds 已提交
1453

1454
	p = reserve_space(xdr, 4);
1455
	*p = cpu_to_be32(NFS4_OPEN_CLAIM_NULL);
L
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1456 1457 1458
	encode_string(xdr, name->len, name->name);
}

1459
static inline void encode_claim_previous(struct xdr_stream *xdr, fmode_t type)
L
Linus Torvalds 已提交
1460
{
A
Al Viro 已提交
1461
	__be32 *p;
L
Linus Torvalds 已提交
1462

1463
	p = reserve_space(xdr, 4);
1464
	*p = cpu_to_be32(NFS4_OPEN_CLAIM_PREVIOUS);
L
Linus Torvalds 已提交
1465 1466 1467 1468 1469
	encode_delegation_type(xdr, type);
}

static inline void encode_claim_delegate_cur(struct xdr_stream *xdr, const struct qstr *name, const nfs4_stateid *stateid)
{
A
Al Viro 已提交
1470
	__be32 *p;
L
Linus Torvalds 已提交
1471

1472 1473 1474
	p = reserve_space(xdr, 4);
	*p = cpu_to_be32(NFS4_OPEN_CLAIM_DELEGATE_CUR);
	encode_nfs4_stateid(xdr, stateid);
L
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1475 1476 1477
	encode_string(xdr, name->len, name->name);
}

1478 1479 1480 1481 1482 1483 1484 1485 1486 1487 1488 1489 1490 1491 1492 1493 1494
static inline void encode_claim_fh(struct xdr_stream *xdr)
{
	__be32 *p;

	p = reserve_space(xdr, 4);
	*p = cpu_to_be32(NFS4_OPEN_CLAIM_FH);
}

static inline void encode_claim_delegate_cur_fh(struct xdr_stream *xdr, const nfs4_stateid *stateid)
{
	__be32 *p;

	p = reserve_space(xdr, 4);
	*p = cpu_to_be32(NFS4_OPEN_CLAIM_DELEG_CUR_FH);
	encode_nfs4_stateid(xdr, stateid);
}

1495
static void encode_open(struct xdr_stream *xdr, const struct nfs_openargs *arg, struct compound_hdr *hdr)
L
Linus Torvalds 已提交
1496
{
T
Trond Myklebust 已提交
1497
	encode_op_hdr(xdr, OP_OPEN, decode_open_maxsz, hdr);
L
Linus Torvalds 已提交
1498 1499 1500
	encode_openhdr(xdr, arg);
	encode_opentype(xdr, arg);
	switch (arg->claim) {
A
Andy Adamson 已提交
1501 1502 1503 1504 1505 1506 1507 1508 1509
	case NFS4_OPEN_CLAIM_NULL:
		encode_claim_null(xdr, arg->name);
		break;
	case NFS4_OPEN_CLAIM_PREVIOUS:
		encode_claim_previous(xdr, arg->u.delegation_type);
		break;
	case NFS4_OPEN_CLAIM_DELEGATE_CUR:
		encode_claim_delegate_cur(xdr, arg->name, &arg->u.delegation);
		break;
1510 1511 1512 1513 1514 1515
	case NFS4_OPEN_CLAIM_FH:
		encode_claim_fh(xdr);
		break;
	case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
		encode_claim_delegate_cur_fh(xdr, &arg->u.delegation);
		break;
A
Andy Adamson 已提交
1516 1517
	default:
		BUG();
L
Linus Torvalds 已提交
1518 1519 1520
	}
}

1521
static void encode_open_confirm(struct xdr_stream *xdr, const struct nfs_open_confirmargs *arg, struct compound_hdr *hdr)
L
Linus Torvalds 已提交
1522
{
T
Trond Myklebust 已提交
1523
	encode_op_hdr(xdr, OP_OPEN_CONFIRM, decode_open_confirm_maxsz, hdr);
1524
	encode_nfs4_stateid(xdr, arg->stateid);
1525
	encode_nfs4_seqid(xdr, arg->seqid);
L
Linus Torvalds 已提交
1526 1527
}

1528
static void encode_open_downgrade(struct xdr_stream *xdr, const struct nfs_closeargs *arg, struct compound_hdr *hdr)
L
Linus Torvalds 已提交
1529
{
T
Trond Myklebust 已提交
1530
	encode_op_hdr(xdr, OP_OPEN_DOWNGRADE, decode_open_downgrade_maxsz, hdr);
1531
	encode_nfs4_stateid(xdr, arg->stateid);
1532
	encode_nfs4_seqid(xdr, arg->seqid);
1533
	encode_share_access(xdr, arg->fmode);
L
Linus Torvalds 已提交
1534 1535
}

1536
static void
1537
encode_putfh(struct xdr_stream *xdr, const struct nfs_fh *fh, struct compound_hdr *hdr)
L
Linus Torvalds 已提交
1538
{
T
Trond Myklebust 已提交
1539
	encode_op_hdr(xdr, OP_PUTFH, decode_putfh_maxsz, hdr);
1540
	encode_string(xdr, fh->size, fh->data);
L
Linus Torvalds 已提交
1541 1542
}

1543
static void encode_putrootfh(struct xdr_stream *xdr, struct compound_hdr *hdr)
L
Linus Torvalds 已提交
1544
{
T
Trond Myklebust 已提交
1545
	encode_op_hdr(xdr, OP_PUTROOTFH, decode_putrootfh_maxsz, hdr);
L
Linus Torvalds 已提交
1546 1547
}

1548
static void encode_read(struct xdr_stream *xdr, const struct nfs_readargs *args, struct compound_hdr *hdr)
L
Linus Torvalds 已提交
1549
{
A
Al Viro 已提交
1550
	__be32 *p;
L
Linus Torvalds 已提交
1551

T
Trond Myklebust 已提交
1552
	encode_op_hdr(xdr, OP_READ, decode_read_maxsz, hdr);
1553
	encode_nfs4_stateid(xdr, &args->stateid);
L
Linus Torvalds 已提交
1554

1555
	p = reserve_space(xdr, 12);
B
Benny Halevy 已提交
1556
	p = xdr_encode_hyper(p, args->offset);
1557
	*p = cpu_to_be32(args->count);
L
Linus Torvalds 已提交
1558 1559
}

1560
static void encode_readdir(struct xdr_stream *xdr, const struct nfs4_readdir_arg *readdir, struct rpc_rqst *req, struct compound_hdr *hdr)
L
Linus Torvalds 已提交
1561
{
1562
	uint32_t attrs[3] = {
1563 1564 1565
		FATTR4_WORD0_RDATTR_ERROR,
		FATTR4_WORD1_MOUNTED_ON_FILEID,
	};
1566
	uint32_t dircount = readdir->count >> 1;
1567
	__be32 *p, verf[2];
L
Linus Torvalds 已提交
1568

B
Bryan Schumaker 已提交
1569 1570
	if (readdir->plus) {
		attrs[0] |= FATTR4_WORD0_TYPE|FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE|
1571
			FATTR4_WORD0_FSID|FATTR4_WORD0_FILEHANDLE|FATTR4_WORD0_FILEID;
B
Bryan Schumaker 已提交
1572 1573 1574 1575
		attrs[1] |= FATTR4_WORD1_MODE|FATTR4_WORD1_NUMLINKS|FATTR4_WORD1_OWNER|
			FATTR4_WORD1_OWNER_GROUP|FATTR4_WORD1_RAWDEV|
			FATTR4_WORD1_SPACE_USED|FATTR4_WORD1_TIME_ACCESS|
			FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
1576
		dircount >>= 1;
B
Bryan Schumaker 已提交
1577
	}
1578 1579 1580
	/* Use mounted_on_fileid only if the server supports it */
	if (!(readdir->bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID))
		attrs[0] |= FATTR4_WORD0_FILEID;
B
Bryan Schumaker 已提交
1581

T
Trond Myklebust 已提交
1582
	encode_op_hdr(xdr, OP_READDIR, decode_readdir_maxsz, hdr);
1583
	encode_uint64(xdr, readdir->cookie);
1584
	encode_nfs4_verifier(xdr, &readdir->verifier);
1585
	p = reserve_space(xdr, encode_readdir_space);
1586
	*p++ = cpu_to_be32(dircount);
B
Benny Halevy 已提交
1587
	*p++ = cpu_to_be32(readdir->count);
1588
	*p++ = cpu_to_be32(encode_readdir_bitmask_sz);
B
Benny Halevy 已提交
1589
	*p++ = cpu_to_be32(attrs[0] & readdir->bitmask[0]);
1590 1591 1592 1593 1594 1595
	*p   = cpu_to_be32(attrs[1] & readdir->bitmask[1]);
	if (encode_readdir_bitmask_sz > 2) {
		if (hdr->minorversion > 1)
			attrs[2] |= FATTR4_WORD2_SECURITY_LABEL;
		p++, *p++ = cpu_to_be32(attrs[2] & readdir->bitmask[2]);
	}
1596
	memcpy(verf, readdir->verifier.data, sizeof(verf));
1597 1598

	dprintk("%s: cookie = %llu, verifier = %08x:%08x, bitmap = %08x:%08x:%08x\n",
1599
			__func__,
1600
			(unsigned long long)readdir->cookie,
1601
			verf[0], verf[1],
1602
			attrs[0] & readdir->bitmask[0],
1603 1604
			attrs[1] & readdir->bitmask[1],
			attrs[2] & readdir->bitmask[2]);
L
Linus Torvalds 已提交
1605 1606
}

1607
static void encode_readlink(struct xdr_stream *xdr, const struct nfs4_readlink *readlink, struct rpc_rqst *req, struct compound_hdr *hdr)
L
Linus Torvalds 已提交
1608
{
T
Trond Myklebust 已提交
1609
	encode_op_hdr(xdr, OP_READLINK, decode_readlink_maxsz, hdr);
L
Linus Torvalds 已提交
1610 1611
}

1612
static void encode_remove(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
L
Linus Torvalds 已提交
1613
{
T
Trond Myklebust 已提交
1614
	encode_op_hdr(xdr, OP_REMOVE, decode_remove_maxsz, hdr);
1615
	encode_string(xdr, name->len, name->name);
L
Linus Torvalds 已提交
1616 1617
}

1618
static void encode_rename(struct xdr_stream *xdr, const struct qstr *oldname, const struct qstr *newname, struct compound_hdr *hdr)
L
Linus Torvalds 已提交
1619
{
T
Trond Myklebust 已提交
1620
	encode_op_hdr(xdr, OP_RENAME, decode_rename_maxsz, hdr);
1621 1622
	encode_string(xdr, oldname->len, oldname->name);
	encode_string(xdr, newname->len, newname->name);
L
Linus Torvalds 已提交
1623 1624
}

1625 1626
static void encode_renew(struct xdr_stream *xdr, clientid4 clid,
			 struct compound_hdr *hdr)
L
Linus Torvalds 已提交
1627
{
T
Trond Myklebust 已提交
1628
	encode_op_hdr(xdr, OP_RENEW, decode_renew_maxsz, hdr);
1629
	encode_uint64(xdr, clid);
L
Linus Torvalds 已提交
1630 1631
}

1632
static void
1633
encode_restorefh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1634
{
T
Trond Myklebust 已提交
1635
	encode_op_hdr(xdr, OP_RESTOREFH, decode_restorefh_maxsz, hdr);
1636 1637
}

1638
static void
1639
encode_setacl(struct xdr_stream *xdr, struct nfs_setaclargs *arg, struct compound_hdr *hdr)
1640
{
A
Al Viro 已提交
1641
	__be32 *p;
1642

T
Trond Myklebust 已提交
1643
	encode_op_hdr(xdr, OP_SETATTR, decode_setacl_maxsz, hdr);
1644
	encode_nfs4_stateid(xdr, &zero_stateid);
1645
	p = reserve_space(xdr, 2*4);
B
Benny Halevy 已提交
1646
	*p++ = cpu_to_be32(1);
1647
	*p = cpu_to_be32(FATTR4_WORD0_ACL);
1648
	p = reserve_space(xdr, 4);
1649
	*p = cpu_to_be32(arg->acl_len);
1650 1651 1652
	xdr_write_pages(xdr, arg->acl_pages, arg->acl_pgbase, arg->acl_len);
}

1653
static void
1654
encode_savefh(struct xdr_stream *xdr, struct compound_hdr *hdr)
L
Linus Torvalds 已提交
1655
{
T
Trond Myklebust 已提交
1656
	encode_op_hdr(xdr, OP_SAVEFH, decode_savefh_maxsz, hdr);
L
Linus Torvalds 已提交
1657 1658
}

1659
static void encode_setattr(struct xdr_stream *xdr, const struct nfs_setattrargs *arg, const struct nfs_server *server, struct compound_hdr *hdr)
L
Linus Torvalds 已提交
1660
{
T
Trond Myklebust 已提交
1661
	encode_op_hdr(xdr, OP_SETATTR, decode_setattr_maxsz, hdr);
1662
	encode_nfs4_stateid(xdr, &arg->stateid);
1663
	encode_attrs(xdr, arg->iap, arg->label, server);
L
Linus Torvalds 已提交
1664 1665
}

1666
static void encode_setclientid(struct xdr_stream *xdr, const struct nfs4_setclientid *setclientid, struct compound_hdr *hdr)
L
Linus Torvalds 已提交
1667
{
A
Al Viro 已提交
1668
	__be32 *p;
L
Linus Torvalds 已提交
1669

1670
	encode_op_hdr(xdr, OP_SETCLIENTID, decode_setclientid_maxsz, hdr);
1671
	encode_nfs4_verifier(xdr, setclientid->sc_verifier);
L
Linus Torvalds 已提交
1672 1673

	encode_string(xdr, setclientid->sc_name_len, setclientid->sc_name);
1674
	p = reserve_space(xdr, 4);
1675
	*p = cpu_to_be32(setclientid->sc_prog);
L
Linus Torvalds 已提交
1676 1677
	encode_string(xdr, setclientid->sc_netid_len, setclientid->sc_netid);
	encode_string(xdr, setclientid->sc_uaddr_len, setclientid->sc_uaddr);
1678
	p = reserve_space(xdr, 4);
1679
	*p = cpu_to_be32(setclientid->sc_cb_ident);
L
Linus Torvalds 已提交
1680 1681
}

1682
static void encode_setclientid_confirm(struct xdr_stream *xdr, const struct nfs4_setclientid_res *arg, struct compound_hdr *hdr)
L
Linus Torvalds 已提交
1683
{
T
Trond Myklebust 已提交
1684 1685
	encode_op_hdr(xdr, OP_SETCLIENTID_CONFIRM,
			decode_setclientid_confirm_maxsz, hdr);
1686
	encode_uint64(xdr, arg->clientid);
1687
	encode_nfs4_verifier(xdr, &arg->confirm);
L
Linus Torvalds 已提交
1688 1689
}

1690
static void encode_write(struct xdr_stream *xdr, const struct nfs_writeargs *args, struct compound_hdr *hdr)
L
Linus Torvalds 已提交
1691
{
A
Al Viro 已提交
1692
	__be32 *p;
L
Linus Torvalds 已提交
1693

T
Trond Myklebust 已提交
1694
	encode_op_hdr(xdr, OP_WRITE, decode_write_maxsz, hdr);
1695
	encode_nfs4_stateid(xdr, &args->stateid);
L
Linus Torvalds 已提交
1696

1697
	p = reserve_space(xdr, 16);
B
Benny Halevy 已提交
1698
	p = xdr_encode_hyper(p, args->offset);
B
Benny Halevy 已提交
1699
	*p++ = cpu_to_be32(args->stable);
1700
	*p = cpu_to_be32(args->count);
L
Linus Torvalds 已提交
1701 1702 1703 1704

	xdr_write_pages(xdr, args->pages, args->pgbase, args->count);
}

1705
static void encode_delegreturn(struct xdr_stream *xdr, const nfs4_stateid *stateid, struct compound_hdr *hdr)
L
Linus Torvalds 已提交
1706
{
T
Trond Myklebust 已提交
1707
	encode_op_hdr(xdr, OP_DELEGRETURN, decode_delegreturn_maxsz, hdr);
1708
	encode_nfs4_stateid(xdr, stateid);
L
Linus Torvalds 已提交
1709
}
1710

B
Bryan Schumaker 已提交
1711 1712
static void encode_secinfo(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
{
T
Trond Myklebust 已提交
1713
	encode_op_hdr(xdr, OP_SECINFO, decode_secinfo_maxsz, hdr);
1714
	encode_string(xdr, name->len, name->name);
B
Bryan Schumaker 已提交
1715 1716
}

B
Benny Halevy 已提交
1717
#if defined(CONFIG_NFS_V4_1)
1718
/* NFSv4.1 operations */
1719 1720 1721 1722 1723 1724 1725 1726 1727 1728 1729 1730 1731 1732
static void encode_bind_conn_to_session(struct xdr_stream *xdr,
				   struct nfs4_session *session,
				   struct compound_hdr *hdr)
{
	__be32 *p;

	encode_op_hdr(xdr, OP_BIND_CONN_TO_SESSION,
		decode_bind_conn_to_session_maxsz, hdr);
	encode_opaque_fixed(xdr, session->sess_id.data, NFS4_MAX_SESSIONID_LEN);
	p = xdr_reserve_space(xdr, 8);
	*p++ = cpu_to_be32(NFS4_CDFC4_BACK_OR_BOTH);
	*p = 0;	/* use_conn_in_rdma_mode = False */
}

1733 1734 1735 1736 1737 1738 1739 1740
static void encode_op_map(struct xdr_stream *xdr, struct nfs4_op_map *op_map)
{
	unsigned int i;
	encode_uint32(xdr, NFS4_OP_MAP_NUM_WORDS);
	for (i = 0; i < NFS4_OP_MAP_NUM_WORDS; i++)
		encode_uint32(xdr, op_map->u.words[i]);
}

B
Benny Halevy 已提交
1741 1742 1743 1744 1745
static void encode_exchange_id(struct xdr_stream *xdr,
			       struct nfs41_exchange_id_args *args,
			       struct compound_hdr *hdr)
{
	__be32 *p;
1746
	char impl_name[IMPL_NAME_LIMIT];
1747
	int len = 0;
B
Benny Halevy 已提交
1748

1749
	encode_op_hdr(xdr, OP_EXCHANGE_ID, decode_exchange_id_maxsz, hdr);
1750
	encode_nfs4_verifier(xdr, args->verifier);
B
Benny Halevy 已提交
1751 1752 1753

	encode_string(xdr, args->id_len, args->id);

1754 1755 1756 1757 1758 1759 1760 1761 1762 1763 1764 1765 1766 1767
	encode_uint32(xdr, args->flags);
	encode_uint32(xdr, args->state_protect.how);

	switch (args->state_protect.how) {
	case SP4_NONE:
		break;
	case SP4_MACH_CRED:
		encode_op_map(xdr, &args->state_protect.enforce);
		encode_op_map(xdr, &args->state_protect.allow);
		break;
	default:
		WARN_ON_ONCE(1);
		break;
	}
1768 1769 1770 1771

	if (send_implementation_id &&
	    sizeof(CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN) > 1 &&
	    sizeof(CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN)
1772
		<= sizeof(impl_name) + 1)
1773 1774 1775 1776 1777
		len = snprintf(impl_name, sizeof(impl_name), "%s %s %s %s",
			       utsname()->sysname, utsname()->release,
			       utsname()->version, utsname()->machine);

	if (len > 0) {
1778
		encode_uint32(xdr, 1);	/* implementation id array length=1 */
1779 1780 1781 1782 1783 1784 1785 1786 1787 1788

		encode_string(xdr,
			sizeof(CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN) - 1,
			CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN);
		encode_string(xdr, len, impl_name);
		/* just send zeros for nii_date - the date is in nii_name */
		p = reserve_space(xdr, 12);
		p = xdr_encode_hyper(p, 0);
		*p = cpu_to_be32(0);
	} else
1789
		encode_uint32(xdr, 0);	/* implementation id array length=0 */
B
Benny Halevy 已提交
1790
}
A
Andy Adamson 已提交
1791 1792 1793 1794 1795 1796 1797 1798 1799

static void encode_create_session(struct xdr_stream *xdr,
				  struct nfs41_create_session_args *args,
				  struct compound_hdr *hdr)
{
	__be32 *p;
	char machine_name[NFS4_MAX_MACHINE_NAME_LEN];
	uint32_t len;
	struct nfs_client *clp = args->client;
1800
	struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id);
1801 1802 1803 1804 1805 1806 1807 1808
	u32 max_resp_sz_cached;

	/*
	 * Assumes OPEN is the biggest non-idempotent compound.
	 * 2 is the verifier.
	 */
	max_resp_sz_cached = (NFS4_dec_open_sz + RPC_REPHDRSIZE +
			      RPC_MAX_AUTH_SIZE + 2) * XDR_UNIT;
A
Andy Adamson 已提交
1809

1810 1811
	len = scnprintf(machine_name, sizeof(machine_name), "%s",
			clp->cl_ipaddr);
A
Andy Adamson 已提交
1812

T
Trond Myklebust 已提交
1813 1814
	encode_op_hdr(xdr, OP_CREATE_SESSION, decode_create_session_maxsz, hdr);
	p = reserve_space(xdr, 16 + 2*28 + 20 + len + 12);
1815
	p = xdr_encode_hyper(p, clp->cl_clientid);
B
Benny Halevy 已提交
1816 1817
	*p++ = cpu_to_be32(clp->cl_seqid);			/*Sequence id */
	*p++ = cpu_to_be32(args->flags);			/*flags */
A
Andy Adamson 已提交
1818 1819

	/* Fore Channel */
1820
	*p++ = cpu_to_be32(0);				/* header padding size */
B
Benny Halevy 已提交
1821 1822
	*p++ = cpu_to_be32(args->fc_attrs.max_rqst_sz);	/* max req size */
	*p++ = cpu_to_be32(args->fc_attrs.max_resp_sz);	/* max resp size */
1823
	*p++ = cpu_to_be32(max_resp_sz_cached);		/* Max resp sz cached */
B
Benny Halevy 已提交
1824 1825 1826
	*p++ = cpu_to_be32(args->fc_attrs.max_ops);	/* max operations */
	*p++ = cpu_to_be32(args->fc_attrs.max_reqs);	/* max requests */
	*p++ = cpu_to_be32(0);				/* rdmachannel_attrs */
A
Andy Adamson 已提交
1827 1828

	/* Back Channel */
1829
	*p++ = cpu_to_be32(0);				/* header padding size */
B
Benny Halevy 已提交
1830 1831 1832 1833 1834 1835
	*p++ = cpu_to_be32(args->bc_attrs.max_rqst_sz);	/* max req size */
	*p++ = cpu_to_be32(args->bc_attrs.max_resp_sz);	/* max resp size */
	*p++ = cpu_to_be32(args->bc_attrs.max_resp_sz_cached);	/* Max resp sz cached */
	*p++ = cpu_to_be32(args->bc_attrs.max_ops);	/* max operations */
	*p++ = cpu_to_be32(args->bc_attrs.max_reqs);	/* max requests */
	*p++ = cpu_to_be32(0);				/* rdmachannel_attrs */
A
Andy Adamson 已提交
1836

B
Benny Halevy 已提交
1837 1838 1839
	*p++ = cpu_to_be32(args->cb_program);		/* cb_program */
	*p++ = cpu_to_be32(1);
	*p++ = cpu_to_be32(RPC_AUTH_UNIX);			/* auth_sys */
A
Andy Adamson 已提交
1840 1841

	/* authsys_parms rfc1831 */
1842
	*p++ = cpu_to_be32(nn->boot_time.tv_nsec);	/* stamp */
1843
	p = xdr_encode_opaque(p, machine_name, len);
B
Benny Halevy 已提交
1844 1845
	*p++ = cpu_to_be32(0);				/* UID */
	*p++ = cpu_to_be32(0);				/* GID */
1846
	*p = cpu_to_be32(0);				/* No more gids */
A
Andy Adamson 已提交
1847
}
A
Andy Adamson 已提交
1848 1849 1850 1851 1852

static void encode_destroy_session(struct xdr_stream *xdr,
				   struct nfs4_session *session,
				   struct compound_hdr *hdr)
{
T
Trond Myklebust 已提交
1853 1854
	encode_op_hdr(xdr, OP_DESTROY_SESSION, decode_destroy_session_maxsz, hdr);
	encode_opaque_fixed(xdr, session->sess_id.data, NFS4_MAX_SESSIONID_LEN);
A
Andy Adamson 已提交
1855
}
1856

T
Trond Myklebust 已提交
1857 1858 1859 1860 1861 1862 1863 1864
static void encode_destroy_clientid(struct xdr_stream *xdr,
				   uint64_t clientid,
				   struct compound_hdr *hdr)
{
	encode_op_hdr(xdr, OP_DESTROY_CLIENTID, decode_destroy_clientid_maxsz, hdr);
	encode_uint64(xdr, clientid);
}

1865 1866 1867 1868
static void encode_reclaim_complete(struct xdr_stream *xdr,
				    struct nfs41_reclaim_complete_args *args,
				    struct compound_hdr *hdr)
{
T
Trond Myklebust 已提交
1869 1870
	encode_op_hdr(xdr, OP_RECLAIM_COMPLETE, decode_reclaim_complete_maxsz, hdr);
	encode_uint32(xdr, args->one_fs);
1871
}
B
Benny Halevy 已提交
1872 1873
#endif /* CONFIG_NFS_V4_1 */

1874 1875 1876 1877 1878
static void encode_sequence(struct xdr_stream *xdr,
			    const struct nfs4_sequence_args *args,
			    struct compound_hdr *hdr)
{
#if defined(CONFIG_NFS_V4_1)
1879
	struct nfs4_session *session;
A
Andy Adamson 已提交
1880
	struct nfs4_slot_table *tp;
1881
	struct nfs4_slot *slot = args->sa_slot;
A
Andy Adamson 已提交
1882
	__be32 *p;
1883

1884 1885
	tp = slot->table;
	session = tp->session;
C
Chuck Lever 已提交
1886 1887
	if (!session)
		return;
A
Andy Adamson 已提交
1888

T
Trond Myklebust 已提交
1889
	encode_op_hdr(xdr, OP_SEQUENCE, decode_sequence_maxsz, hdr);
A
Andy Adamson 已提交
1890 1891 1892 1893 1894 1895 1896 1897 1898 1899 1900

	/*
	 * Sessionid + seqid + slotid + max slotid + cache_this
	 */
	dprintk("%s: sessionid=%u:%u:%u:%u seqid=%d slotid=%d "
		"max_slotid=%d cache_this=%d\n",
		__func__,
		((u32 *)session->sess_id.data)[0],
		((u32 *)session->sess_id.data)[1],
		((u32 *)session->sess_id.data)[2],
		((u32 *)session->sess_id.data)[3],
1901
		slot->seq_nr, slot->slot_nr,
A
Andy Adamson 已提交
1902
		tp->highest_used_slotid, args->sa_cache_this);
T
Trond Myklebust 已提交
1903
	p = reserve_space(xdr, NFS4_MAX_SESSIONID_LEN + 16);
B
Benny Halevy 已提交
1904
	p = xdr_encode_opaque_fixed(p, session->sess_id.data, NFS4_MAX_SESSIONID_LEN);
B
Benny Halevy 已提交
1905
	*p++ = cpu_to_be32(slot->seq_nr);
1906
	*p++ = cpu_to_be32(slot->slot_nr);
B
Benny Halevy 已提交
1907
	*p++ = cpu_to_be32(tp->highest_used_slotid);
1908
	*p = cpu_to_be32(args->sa_cache_this);
1909 1910 1911
#endif /* CONFIG_NFS_V4_1 */
}

1912
#ifdef CONFIG_NFS_V4_1
A
Andy Adamson 已提交
1913 1914 1915 1916 1917 1918 1919 1920 1921 1922
static void
encode_getdevicelist(struct xdr_stream *xdr,
		     const struct nfs4_getdevicelist_args *args,
		     struct compound_hdr *hdr)
{
	__be32 *p;
	nfs4_verifier dummy = {
		.data = "dummmmmy",
	};

T
Trond Myklebust 已提交
1923 1924
	encode_op_hdr(xdr, OP_GETDEVICELIST, decode_getdevicelist_maxsz, hdr);
	p = reserve_space(xdr, 16);
A
Andy Adamson 已提交
1925 1926 1927 1928 1929 1930
	*p++ = cpu_to_be32(args->layoutclass);
	*p++ = cpu_to_be32(NFS4_PNFS_GETDEVLIST_MAXNUM);
	xdr_encode_hyper(p, 0ULL);                          /* cookie */
	encode_nfs4_verifier(xdr, &dummy);
}

1931 1932 1933 1934 1935 1936 1937
static void
encode_getdeviceinfo(struct xdr_stream *xdr,
		     const struct nfs4_getdeviceinfo_args *args,
		     struct compound_hdr *hdr)
{
	__be32 *p;

T
Trond Myklebust 已提交
1938 1939
	encode_op_hdr(xdr, OP_GETDEVICEINFO, decode_getdeviceinfo_maxsz, hdr);
	p = reserve_space(xdr, 12 + NFS4_DEVICEID4_SIZE);
1940 1941 1942
	p = xdr_encode_opaque_fixed(p, args->pdev->dev_id.data,
				    NFS4_DEVICEID4_SIZE);
	*p++ = cpu_to_be32(args->pdev->layout_type);
1943
	*p++ = cpu_to_be32(args->pdev->maxcount);	/* gdia_maxcount */
1944 1945 1946 1947 1948 1949 1950 1951 1952 1953
	*p++ = cpu_to_be32(0);				/* bitmap length 0 */
}

static void
encode_layoutget(struct xdr_stream *xdr,
		      const struct nfs4_layoutget_args *args,
		      struct compound_hdr *hdr)
{
	__be32 *p;

T
Trond Myklebust 已提交
1954 1955
	encode_op_hdr(xdr, OP_LAYOUTGET, decode_layoutget_maxsz, hdr);
	p = reserve_space(xdr, 36);
1956 1957 1958 1959 1960 1961
	*p++ = cpu_to_be32(0);     /* Signal layout available */
	*p++ = cpu_to_be32(args->type);
	*p++ = cpu_to_be32(args->range.iomode);
	p = xdr_encode_hyper(p, args->range.offset);
	p = xdr_encode_hyper(p, args->range.length);
	p = xdr_encode_hyper(p, args->minlength);
1962
	encode_nfs4_stateid(xdr, &args->stateid);
T
Trond Myklebust 已提交
1963
	encode_uint32(xdr, args->maxcount);
1964 1965 1966 1967 1968 1969 1970 1971 1972

	dprintk("%s: 1st type:0x%x iomode:%d off:%lu len:%lu mc:%d\n",
		__func__,
		args->type,
		args->range.iomode,
		(unsigned long)args->range.offset,
		(unsigned long)args->range.length,
		args->maxcount);
}
A
Andy Adamson 已提交
1973 1974 1975

static int
encode_layoutcommit(struct xdr_stream *xdr,
B
Benny Halevy 已提交
1976
		    struct inode *inode,
A
Andy Adamson 已提交
1977 1978 1979 1980 1981 1982 1983 1984
		    const struct nfs4_layoutcommit_args *args,
		    struct compound_hdr *hdr)
{
	__be32 *p;

	dprintk("%s: lbw: %llu type: %d\n", __func__, args->lastbytewritten,
		NFS_SERVER(args->inode)->pnfs_curr_ld->id);

T
Trond Myklebust 已提交
1985 1986
	encode_op_hdr(xdr, OP_LAYOUTCOMMIT, decode_layoutcommit_maxsz, hdr);
	p = reserve_space(xdr, 20);
A
Andy Adamson 已提交
1987 1988
	/* Only whole file layouts */
	p = xdr_encode_hyper(p, 0); /* offset */
P
Peng Tao 已提交
1989
	p = xdr_encode_hyper(p, args->lastbytewritten + 1);	/* length */
1990 1991 1992
	*p = cpu_to_be32(0); /* reclaim */
	encode_nfs4_stateid(xdr, &args->stateid);
	p = reserve_space(xdr, 20);
A
Andy Adamson 已提交
1993 1994 1995 1996
	*p++ = cpu_to_be32(1); /* newoffset = TRUE */
	p = xdr_encode_hyper(p, args->lastbytewritten);
	*p++ = cpu_to_be32(0); /* Never send time_modify_changed */
	*p++ = cpu_to_be32(NFS_SERVER(args->inode)->pnfs_curr_ld->id);/* type */
B
Benny Halevy 已提交
1997 1998 1999 2000

	if (NFS_SERVER(inode)->pnfs_curr_ld->encode_layoutcommit)
		NFS_SERVER(inode)->pnfs_curr_ld->encode_layoutcommit(
			NFS_I(inode)->layout, xdr, args);
T
Trond Myklebust 已提交
2001 2002
	else
		encode_uint32(xdr, 0); /* no layout-type payload */
A
Andy Adamson 已提交
2003 2004 2005

	return 0;
}
B
Benny Halevy 已提交
2006 2007 2008 2009 2010 2011 2012 2013

static void
encode_layoutreturn(struct xdr_stream *xdr,
		    const struct nfs4_layoutreturn_args *args,
		    struct compound_hdr *hdr)
{
	__be32 *p;

T
Trond Myklebust 已提交
2014 2015
	encode_op_hdr(xdr, OP_LAYOUTRETURN, decode_layoutreturn_maxsz, hdr);
	p = reserve_space(xdr, 16);
B
Benny Halevy 已提交
2016 2017 2018 2019
	*p++ = cpu_to_be32(0);		/* reclaim. always 0 for now */
	*p++ = cpu_to_be32(args->layout_type);
	*p++ = cpu_to_be32(IOMODE_ANY);
	*p = cpu_to_be32(RETURN_FILE);
2020
	p = reserve_space(xdr, 16);
B
Benny Halevy 已提交
2021 2022 2023
	p = xdr_encode_hyper(p, 0);
	p = xdr_encode_hyper(p, NFS4_MAX_UINT64);
	spin_lock(&args->inode->i_lock);
2024
	encode_nfs4_stateid(xdr, &args->stateid);
B
Benny Halevy 已提交
2025
	spin_unlock(&args->inode->i_lock);
A
Andy Adamson 已提交
2026 2027 2028
	if (NFS_SERVER(args->inode)->pnfs_curr_ld->encode_layoutreturn) {
		NFS_SERVER(args->inode)->pnfs_curr_ld->encode_layoutreturn(
			NFS_I(args->inode)->layout, xdr, args);
T
Trond Myklebust 已提交
2029 2030
	} else
		encode_uint32(xdr, 0);
B
Benny Halevy 已提交
2031
}
2032 2033 2034 2035 2036 2037

static int
encode_secinfo_no_name(struct xdr_stream *xdr,
		       const struct nfs41_secinfo_no_name_args *args,
		       struct compound_hdr *hdr)
{
T
Trond Myklebust 已提交
2038 2039
	encode_op_hdr(xdr, OP_SECINFO_NO_NAME, decode_secinfo_no_name_maxsz, hdr);
	encode_uint32(xdr, args->style);
2040 2041
	return 0;
}
B
Bryan Schumaker 已提交
2042 2043 2044 2045 2046

static void encode_test_stateid(struct xdr_stream *xdr,
				struct nfs41_test_stateid_args *args,
				struct compound_hdr *hdr)
{
T
Trond Myklebust 已提交
2047 2048
	encode_op_hdr(xdr, OP_TEST_STATEID, decode_test_stateid_maxsz, hdr);
	encode_uint32(xdr, 1);
2049
	encode_nfs4_stateid(xdr, args->stateid);
B
Bryan Schumaker 已提交
2050
}
B
Bryan Schumaker 已提交
2051 2052 2053 2054 2055

static void encode_free_stateid(struct xdr_stream *xdr,
				struct nfs41_free_stateid_args *args,
				struct compound_hdr *hdr)
{
T
Trond Myklebust 已提交
2056
	encode_op_hdr(xdr, OP_FREE_STATEID, decode_free_stateid_maxsz, hdr);
2057
	encode_nfs4_stateid(xdr, &args->stateid);
B
Bryan Schumaker 已提交
2058
}
2059 2060
#endif /* CONFIG_NFS_V4_1 */

L
Linus Torvalds 已提交
2061 2062 2063 2064
/*
 * END OF "GENERIC" ENCODE ROUTINES.
 */

2065 2066 2067
static u32 nfs4_xdr_minorversion(const struct nfs4_sequence_args *args)
{
#if defined(CONFIG_NFS_V4_1)
C
Chuck Lever 已提交
2068 2069 2070
	struct nfs4_session *session = args->sa_slot->table->session;
	if (session)
		return session->clp->cl_mvops->minor_version;
2071 2072 2073 2074
#endif /* CONFIG_NFS_V4_1 */
	return 0;
}

L
Linus Torvalds 已提交
2075 2076 2077
/*
 * Encode an ACCESS request
 */
2078 2079
static void nfs4_xdr_enc_access(struct rpc_rqst *req, struct xdr_stream *xdr,
				const struct nfs4_accessargs *args)
L
Linus Torvalds 已提交
2080 2081
{
	struct compound_hdr hdr = {
2082
		.minorversion = nfs4_xdr_minorversion(&args->seq_args),
L
Linus Torvalds 已提交
2083 2084
	};

2085 2086 2087 2088 2089
	encode_compound_hdr(xdr, req, &hdr);
	encode_sequence(xdr, &args->seq_args, &hdr);
	encode_putfh(xdr, args->fh, &hdr);
	encode_access(xdr, args->access, &hdr);
	encode_getfattr(xdr, args->bitmask, &hdr);
2090
	encode_nops(&hdr);
L
Linus Torvalds 已提交
2091 2092 2093 2094 2095
}

/*
 * Encode LOOKUP request
 */
2096 2097
static void nfs4_xdr_enc_lookup(struct rpc_rqst *req, struct xdr_stream *xdr,
				const struct nfs4_lookup_arg *args)
L
Linus Torvalds 已提交
2098 2099
{
	struct compound_hdr hdr = {
2100
		.minorversion = nfs4_xdr_minorversion(&args->seq_args),
L
Linus Torvalds 已提交
2101 2102
	};

2103 2104 2105 2106 2107 2108
	encode_compound_hdr(xdr, req, &hdr);
	encode_sequence(xdr, &args->seq_args, &hdr);
	encode_putfh(xdr, args->dir_fh, &hdr);
	encode_lookup(xdr, args->name, &hdr);
	encode_getfh(xdr, &hdr);
	encode_getfattr(xdr, args->bitmask, &hdr);
2109
	encode_nops(&hdr);
L
Linus Torvalds 已提交
2110 2111 2112 2113 2114
}

/*
 * Encode LOOKUP_ROOT request
 */
2115 2116 2117
static void nfs4_xdr_enc_lookup_root(struct rpc_rqst *req,
				     struct xdr_stream *xdr,
				     const struct nfs4_lookup_root_arg *args)
L
Linus Torvalds 已提交
2118 2119
{
	struct compound_hdr hdr = {
2120
		.minorversion = nfs4_xdr_minorversion(&args->seq_args),
L
Linus Torvalds 已提交
2121 2122
	};

2123 2124 2125 2126 2127
	encode_compound_hdr(xdr, req, &hdr);
	encode_sequence(xdr, &args->seq_args, &hdr);
	encode_putrootfh(xdr, &hdr);
	encode_getfh(xdr, &hdr);
	encode_getfattr(xdr, args->bitmask, &hdr);
2128
	encode_nops(&hdr);
L
Linus Torvalds 已提交
2129 2130 2131 2132 2133
}

/*
 * Encode REMOVE request
 */
2134 2135
static void nfs4_xdr_enc_remove(struct rpc_rqst *req, struct xdr_stream *xdr,
				const struct nfs_removeargs *args)
L
Linus Torvalds 已提交
2136 2137
{
	struct compound_hdr hdr = {
2138
		.minorversion = nfs4_xdr_minorversion(&args->seq_args),
L
Linus Torvalds 已提交
2139 2140
	};

2141 2142 2143 2144
	encode_compound_hdr(xdr, req, &hdr);
	encode_sequence(xdr, &args->seq_args, &hdr);
	encode_putfh(xdr, args->fh, &hdr);
	encode_remove(xdr, &args->name, &hdr);
2145
	encode_nops(&hdr);
L
Linus Torvalds 已提交
2146 2147 2148 2149 2150
}

/*
 * Encode RENAME request
 */
2151 2152
static void nfs4_xdr_enc_rename(struct rpc_rqst *req, struct xdr_stream *xdr,
				const struct nfs_renameargs *args)
L
Linus Torvalds 已提交
2153 2154
{
	struct compound_hdr hdr = {
2155
		.minorversion = nfs4_xdr_minorversion(&args->seq_args),
L
Linus Torvalds 已提交
2156 2157
	};

2158 2159 2160 2161 2162 2163
	encode_compound_hdr(xdr, req, &hdr);
	encode_sequence(xdr, &args->seq_args, &hdr);
	encode_putfh(xdr, args->old_dir, &hdr);
	encode_savefh(xdr, &hdr);
	encode_putfh(xdr, args->new_dir, &hdr);
	encode_rename(xdr, args->old_name, args->new_name, &hdr);
2164
	encode_nops(&hdr);
L
Linus Torvalds 已提交
2165 2166 2167 2168 2169
}

/*
 * Encode LINK request
 */
2170 2171
static void nfs4_xdr_enc_link(struct rpc_rqst *req, struct xdr_stream *xdr,
			     const struct nfs4_link_arg *args)
L
Linus Torvalds 已提交
2172 2173
{
	struct compound_hdr hdr = {
2174
		.minorversion = nfs4_xdr_minorversion(&args->seq_args),
L
Linus Torvalds 已提交
2175 2176
	};

2177 2178 2179 2180 2181 2182 2183 2184
	encode_compound_hdr(xdr, req, &hdr);
	encode_sequence(xdr, &args->seq_args, &hdr);
	encode_putfh(xdr, args->fh, &hdr);
	encode_savefh(xdr, &hdr);
	encode_putfh(xdr, args->dir_fh, &hdr);
	encode_link(xdr, args->name, &hdr);
	encode_restorefh(xdr, &hdr);
	encode_getfattr(xdr, args->bitmask, &hdr);
2185
	encode_nops(&hdr);
L
Linus Torvalds 已提交
2186 2187 2188 2189 2190
}

/*
 * Encode CREATE request
 */
2191 2192
static void nfs4_xdr_enc_create(struct rpc_rqst *req, struct xdr_stream *xdr,
				const struct nfs4_create_arg *args)
L
Linus Torvalds 已提交
2193 2194
{
	struct compound_hdr hdr = {
2195
		.minorversion = nfs4_xdr_minorversion(&args->seq_args),
L
Linus Torvalds 已提交
2196 2197
	};

2198 2199 2200 2201 2202 2203
	encode_compound_hdr(xdr, req, &hdr);
	encode_sequence(xdr, &args->seq_args, &hdr);
	encode_putfh(xdr, args->dir_fh, &hdr);
	encode_create(xdr, args, &hdr);
	encode_getfh(xdr, &hdr);
	encode_getfattr(xdr, args->bitmask, &hdr);
2204
	encode_nops(&hdr);
L
Linus Torvalds 已提交
2205 2206 2207 2208 2209
}

/*
 * Encode SYMLINK request
 */
2210 2211
static void nfs4_xdr_enc_symlink(struct rpc_rqst *req, struct xdr_stream *xdr,
				 const struct nfs4_create_arg *args)
L
Linus Torvalds 已提交
2212
{
2213
	nfs4_xdr_enc_create(req, xdr, args);
L
Linus Torvalds 已提交
2214 2215 2216 2217 2218
}

/*
 * Encode GETATTR request
 */
2219 2220
static void nfs4_xdr_enc_getattr(struct rpc_rqst *req, struct xdr_stream *xdr,
				 const struct nfs4_getattr_arg *args)
L
Linus Torvalds 已提交
2221 2222
{
	struct compound_hdr hdr = {
2223
		.minorversion = nfs4_xdr_minorversion(&args->seq_args),
L
Linus Torvalds 已提交
2224 2225
	};

2226 2227 2228 2229
	encode_compound_hdr(xdr, req, &hdr);
	encode_sequence(xdr, &args->seq_args, &hdr);
	encode_putfh(xdr, args->fh, &hdr);
	encode_getfattr(xdr, args->bitmask, &hdr);
2230
	encode_nops(&hdr);
L
Linus Torvalds 已提交
2231 2232 2233 2234 2235
}

/*
 * Encode a CLOSE request
 */
2236 2237
static void nfs4_xdr_enc_close(struct rpc_rqst *req, struct xdr_stream *xdr,
			       struct nfs_closeargs *args)
L
Linus Torvalds 已提交
2238
{
A
Andy Adamson 已提交
2239
	struct compound_hdr hdr = {
2240
		.minorversion = nfs4_xdr_minorversion(&args->seq_args),
A
Andy Adamson 已提交
2241 2242
	};

2243 2244 2245 2246 2247
	encode_compound_hdr(xdr, req, &hdr);
	encode_sequence(xdr, &args->seq_args, &hdr);
	encode_putfh(xdr, args->fh, &hdr);
	encode_close(xdr, args, &hdr);
	encode_getfattr(xdr, args->bitmask, &hdr);
2248
	encode_nops(&hdr);
L
Linus Torvalds 已提交
2249 2250 2251 2252 2253
}

/*
 * Encode an OPEN request
 */
2254 2255
static void nfs4_xdr_enc_open(struct rpc_rqst *req, struct xdr_stream *xdr,
			      struct nfs_openargs *args)
L
Linus Torvalds 已提交
2256 2257
{
	struct compound_hdr hdr = {
2258
		.minorversion = nfs4_xdr_minorversion(&args->seq_args),
L
Linus Torvalds 已提交
2259 2260
	};

2261 2262 2263 2264 2265
	encode_compound_hdr(xdr, req, &hdr);
	encode_sequence(xdr, &args->seq_args, &hdr);
	encode_putfh(xdr, args->fh, &hdr);
	encode_open(xdr, args, &hdr);
	encode_getfh(xdr, &hdr);
2266 2267
	if (args->access)
		encode_access(xdr, args->access, &hdr);
2268
	encode_getfattr_open(xdr, args->bitmask, args->open_bitmap, &hdr);
2269
	encode_nops(&hdr);
L
Linus Torvalds 已提交
2270 2271 2272 2273 2274
}

/*
 * Encode an OPEN_CONFIRM request
 */
2275 2276 2277
static void nfs4_xdr_enc_open_confirm(struct rpc_rqst *req,
				      struct xdr_stream *xdr,
				      struct nfs_open_confirmargs *args)
L
Linus Torvalds 已提交
2278 2279
{
	struct compound_hdr hdr = {
2280
		.nops   = 0,
L
Linus Torvalds 已提交
2281 2282
	};

2283 2284 2285
	encode_compound_hdr(xdr, req, &hdr);
	encode_putfh(xdr, args->fh, &hdr);
	encode_open_confirm(xdr, args, &hdr);
2286
	encode_nops(&hdr);
L
Linus Torvalds 已提交
2287 2288 2289 2290 2291
}

/*
 * Encode an OPEN request with no attributes.
 */
2292 2293 2294
static void nfs4_xdr_enc_open_noattr(struct rpc_rqst *req,
				     struct xdr_stream *xdr,
				     struct nfs_openargs *args)
L
Linus Torvalds 已提交
2295 2296
{
	struct compound_hdr hdr = {
2297
		.minorversion = nfs4_xdr_minorversion(&args->seq_args),
L
Linus Torvalds 已提交
2298 2299
	};

2300 2301 2302 2303
	encode_compound_hdr(xdr, req, &hdr);
	encode_sequence(xdr, &args->seq_args, &hdr);
	encode_putfh(xdr, args->fh, &hdr);
	encode_open(xdr, args, &hdr);
2304 2305
	if (args->access)
		encode_access(xdr, args->access, &hdr);
2306
	encode_getfattr_open(xdr, args->bitmask, args->open_bitmap, &hdr);
2307
	encode_nops(&hdr);
L
Linus Torvalds 已提交
2308 2309 2310 2311 2312
}

/*
 * Encode an OPEN_DOWNGRADE request
 */
2313 2314 2315
static void nfs4_xdr_enc_open_downgrade(struct rpc_rqst *req,
					struct xdr_stream *xdr,
					struct nfs_closeargs *args)
L
Linus Torvalds 已提交
2316 2317
{
	struct compound_hdr hdr = {
2318
		.minorversion = nfs4_xdr_minorversion(&args->seq_args),
L
Linus Torvalds 已提交
2319 2320
	};

2321 2322 2323 2324 2325
	encode_compound_hdr(xdr, req, &hdr);
	encode_sequence(xdr, &args->seq_args, &hdr);
	encode_putfh(xdr, args->fh, &hdr);
	encode_open_downgrade(xdr, args, &hdr);
	encode_getfattr(xdr, args->bitmask, &hdr);
2326
	encode_nops(&hdr);
L
Linus Torvalds 已提交
2327 2328 2329 2330 2331
}

/*
 * Encode a LOCK request
 */
2332 2333
static void nfs4_xdr_enc_lock(struct rpc_rqst *req, struct xdr_stream *xdr,
			      struct nfs_lock_args *args)
L
Linus Torvalds 已提交
2334 2335
{
	struct compound_hdr hdr = {
2336
		.minorversion = nfs4_xdr_minorversion(&args->seq_args),
L
Linus Torvalds 已提交
2337 2338
	};

2339 2340 2341 2342
	encode_compound_hdr(xdr, req, &hdr);
	encode_sequence(xdr, &args->seq_args, &hdr);
	encode_putfh(xdr, args->fh, &hdr);
	encode_lock(xdr, args, &hdr);
2343
	encode_nops(&hdr);
L
Linus Torvalds 已提交
2344 2345 2346 2347 2348
}

/*
 * Encode a LOCKT request
 */
2349 2350
static void nfs4_xdr_enc_lockt(struct rpc_rqst *req, struct xdr_stream *xdr,
			       struct nfs_lockt_args *args)
L
Linus Torvalds 已提交
2351 2352
{
	struct compound_hdr hdr = {
2353
		.minorversion = nfs4_xdr_minorversion(&args->seq_args),
L
Linus Torvalds 已提交
2354 2355
	};

2356 2357 2358 2359
	encode_compound_hdr(xdr, req, &hdr);
	encode_sequence(xdr, &args->seq_args, &hdr);
	encode_putfh(xdr, args->fh, &hdr);
	encode_lockt(xdr, args, &hdr);
2360
	encode_nops(&hdr);
L
Linus Torvalds 已提交
2361 2362 2363 2364 2365
}

/*
 * Encode a LOCKU request
 */
2366 2367
static void nfs4_xdr_enc_locku(struct rpc_rqst *req, struct xdr_stream *xdr,
			       struct nfs_locku_args *args)
L
Linus Torvalds 已提交
2368 2369
{
	struct compound_hdr hdr = {
2370
		.minorversion = nfs4_xdr_minorversion(&args->seq_args),
L
Linus Torvalds 已提交
2371 2372
	};

2373 2374 2375 2376
	encode_compound_hdr(xdr, req, &hdr);
	encode_sequence(xdr, &args->seq_args, &hdr);
	encode_putfh(xdr, args->fh, &hdr);
	encode_locku(xdr, args, &hdr);
2377
	encode_nops(&hdr);
L
Linus Torvalds 已提交
2378 2379
}

2380 2381 2382
static void nfs4_xdr_enc_release_lockowner(struct rpc_rqst *req,
					   struct xdr_stream *xdr,
					struct nfs_release_lockowner_args *args)
2383 2384 2385 2386 2387
{
	struct compound_hdr hdr = {
		.minorversion = 0,
	};

2388 2389
	encode_compound_hdr(xdr, req, &hdr);
	encode_release_lockowner(xdr, &args->lock_owner, &hdr);
2390 2391 2392
	encode_nops(&hdr);
}

L
Linus Torvalds 已提交
2393 2394 2395
/*
 * Encode a READLINK request
 */
2396 2397
static void nfs4_xdr_enc_readlink(struct rpc_rqst *req, struct xdr_stream *xdr,
				  const struct nfs4_readlink *args)
L
Linus Torvalds 已提交
2398 2399
{
	struct compound_hdr hdr = {
2400
		.minorversion = nfs4_xdr_minorversion(&args->seq_args),
L
Linus Torvalds 已提交
2401 2402
	};

2403 2404 2405 2406
	encode_compound_hdr(xdr, req, &hdr);
	encode_sequence(xdr, &args->seq_args, &hdr);
	encode_putfh(xdr, args->fh, &hdr);
	encode_readlink(xdr, args, req, &hdr);
2407

2408
	xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2, args->pages,
2409
			args->pgbase, args->pglen);
2410
	encode_nops(&hdr);
L
Linus Torvalds 已提交
2411 2412 2413 2414 2415
}

/*
 * Encode a READDIR request
 */
2416 2417
static void nfs4_xdr_enc_readdir(struct rpc_rqst *req, struct xdr_stream *xdr,
				 const struct nfs4_readdir_arg *args)
L
Linus Torvalds 已提交
2418 2419
{
	struct compound_hdr hdr = {
2420
		.minorversion = nfs4_xdr_minorversion(&args->seq_args),
L
Linus Torvalds 已提交
2421 2422
	};

2423 2424 2425 2426
	encode_compound_hdr(xdr, req, &hdr);
	encode_sequence(xdr, &args->seq_args, &hdr);
	encode_putfh(xdr, args->fh, &hdr);
	encode_readdir(xdr, args, req, &hdr);
2427

2428
	xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2, args->pages,
2429 2430
			 args->pgbase, args->count);
	dprintk("%s: inlined page args = (%u, %p, %u, %u)\n",
2431
			__func__, hdr.replen << 2, args->pages,
2432
			args->pgbase, args->count);
2433
	encode_nops(&hdr);
L
Linus Torvalds 已提交
2434 2435 2436 2437 2438
}

/*
 * Encode a READ request
 */
2439 2440
static void nfs4_xdr_enc_read(struct rpc_rqst *req, struct xdr_stream *xdr,
			      struct nfs_readargs *args)
L
Linus Torvalds 已提交
2441 2442
{
	struct compound_hdr hdr = {
2443
		.minorversion = nfs4_xdr_minorversion(&args->seq_args),
L
Linus Torvalds 已提交
2444 2445
	};

2446 2447 2448 2449
	encode_compound_hdr(xdr, req, &hdr);
	encode_sequence(xdr, &args->seq_args, &hdr);
	encode_putfh(xdr, args->fh, &hdr);
	encode_read(xdr, args, &hdr);
L
Linus Torvalds 已提交
2450

2451
	xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2,
L
Linus Torvalds 已提交
2452
			 args->pages, args->pgbase, args->count);
2453
	req->rq_rcv_buf.flags |= XDRBUF_READ;
2454
	encode_nops(&hdr);
L
Linus Torvalds 已提交
2455 2456 2457 2458 2459
}

/*
 * Encode an SETATTR request
 */
2460 2461
static void nfs4_xdr_enc_setattr(struct rpc_rqst *req, struct xdr_stream *xdr,
				 struct nfs_setattrargs *args)
L
Linus Torvalds 已提交
2462
{
A
Andy Adamson 已提交
2463
	struct compound_hdr hdr = {
2464
		.minorversion = nfs4_xdr_minorversion(&args->seq_args),
A
Andy Adamson 已提交
2465 2466
	};

2467 2468 2469 2470 2471
	encode_compound_hdr(xdr, req, &hdr);
	encode_sequence(xdr, &args->seq_args, &hdr);
	encode_putfh(xdr, args->fh, &hdr);
	encode_setattr(xdr, args, args->server, &hdr);
	encode_getfattr(xdr, args->bitmask, &hdr);
2472
	encode_nops(&hdr);
L
Linus Torvalds 已提交
2473 2474
}

2475 2476 2477
/*
 * Encode a GETACL request
 */
2478 2479
static void nfs4_xdr_enc_getacl(struct rpc_rqst *req, struct xdr_stream *xdr,
				struct nfs_getaclargs *args)
2480 2481
{
	struct compound_hdr hdr = {
2482
		.minorversion = nfs4_xdr_minorversion(&args->seq_args),
2483
	};
2484
	uint32_t replen;
2485

2486 2487 2488
	encode_compound_hdr(xdr, req, &hdr);
	encode_sequence(xdr, &args->seq_args, &hdr);
	encode_putfh(xdr, args->fh, &hdr);
2489
	replen = hdr.replen + op_decode_hdr_maxsz + 1;
2490
	encode_getattr_two(xdr, FATTR4_WORD0_ACL, 0, &hdr);
2491

2492
	xdr_inline_pages(&req->rq_rcv_buf, replen << 2,
2493
		args->acl_pages, args->acl_pgbase, args->acl_len);
2494

2495
	encode_nops(&hdr);
2496 2497
}

L
Linus Torvalds 已提交
2498 2499 2500
/*
 * Encode a WRITE request
 */
2501 2502
static void nfs4_xdr_enc_write(struct rpc_rqst *req, struct xdr_stream *xdr,
			       struct nfs_writeargs *args)
L
Linus Torvalds 已提交
2503 2504
{
	struct compound_hdr hdr = {
2505
		.minorversion = nfs4_xdr_minorversion(&args->seq_args),
L
Linus Torvalds 已提交
2506 2507
	};

2508 2509 2510 2511
	encode_compound_hdr(xdr, req, &hdr);
	encode_sequence(xdr, &args->seq_args, &hdr);
	encode_putfh(xdr, args->fh, &hdr);
	encode_write(xdr, args, &hdr);
2512
	req->rq_snd_buf.flags |= XDRBUF_WRITE;
2513 2514
	if (args->bitmask)
		encode_getfattr(xdr, args->bitmask, &hdr);
2515
	encode_nops(&hdr);
L
Linus Torvalds 已提交
2516 2517 2518 2519 2520
}

/*
 *  a COMMIT request
 */
2521
static void nfs4_xdr_enc_commit(struct rpc_rqst *req, struct xdr_stream *xdr,
2522
				struct nfs_commitargs *args)
L
Linus Torvalds 已提交
2523 2524
{
	struct compound_hdr hdr = {
2525
		.minorversion = nfs4_xdr_minorversion(&args->seq_args),
L
Linus Torvalds 已提交
2526 2527
	};

2528 2529 2530 2531
	encode_compound_hdr(xdr, req, &hdr);
	encode_sequence(xdr, &args->seq_args, &hdr);
	encode_putfh(xdr, args->fh, &hdr);
	encode_commit(xdr, args, &hdr);
2532
	encode_nops(&hdr);
L
Linus Torvalds 已提交
2533 2534 2535 2536 2537
}

/*
 * FSINFO request
 */
2538 2539
static void nfs4_xdr_enc_fsinfo(struct rpc_rqst *req, struct xdr_stream *xdr,
				struct nfs4_fsinfo_arg *args)
L
Linus Torvalds 已提交
2540 2541
{
	struct compound_hdr hdr = {
2542
		.minorversion = nfs4_xdr_minorversion(&args->seq_args),
L
Linus Torvalds 已提交
2543 2544
	};

2545 2546 2547 2548
	encode_compound_hdr(xdr, req, &hdr);
	encode_sequence(xdr, &args->seq_args, &hdr);
	encode_putfh(xdr, args->fh, &hdr);
	encode_fsinfo(xdr, args->bitmask, &hdr);
2549
	encode_nops(&hdr);
L
Linus Torvalds 已提交
2550 2551 2552 2553 2554
}

/*
 * a PATHCONF request
 */
2555 2556
static void nfs4_xdr_enc_pathconf(struct rpc_rqst *req, struct xdr_stream *xdr,
				  const struct nfs4_pathconf_arg *args)
L
Linus Torvalds 已提交
2557 2558
{
	struct compound_hdr hdr = {
2559
		.minorversion = nfs4_xdr_minorversion(&args->seq_args),
L
Linus Torvalds 已提交
2560 2561
	};

2562 2563 2564 2565
	encode_compound_hdr(xdr, req, &hdr);
	encode_sequence(xdr, &args->seq_args, &hdr);
	encode_putfh(xdr, args->fh, &hdr);
	encode_getattr_one(xdr, args->bitmask[0] & nfs4_pathconf_bitmap[0],
2566
			   &hdr);
2567
	encode_nops(&hdr);
L
Linus Torvalds 已提交
2568 2569 2570 2571 2572
}

/*
 * a STATFS request
 */
2573 2574
static void nfs4_xdr_enc_statfs(struct rpc_rqst *req, struct xdr_stream *xdr,
				const struct nfs4_statfs_arg *args)
L
Linus Torvalds 已提交
2575 2576
{
	struct compound_hdr hdr = {
2577
		.minorversion = nfs4_xdr_minorversion(&args->seq_args),
L
Linus Torvalds 已提交
2578 2579
	};

2580 2581 2582 2583
	encode_compound_hdr(xdr, req, &hdr);
	encode_sequence(xdr, &args->seq_args, &hdr);
	encode_putfh(xdr, args->fh, &hdr);
	encode_getattr_two(xdr, args->bitmask[0] & nfs4_statfs_bitmap[0],
2584
			   args->bitmask[1] & nfs4_statfs_bitmap[1], &hdr);
2585
	encode_nops(&hdr);
L
Linus Torvalds 已提交
2586 2587 2588 2589 2590
}

/*
 * GETATTR_BITMAP request
 */
2591 2592 2593
static void nfs4_xdr_enc_server_caps(struct rpc_rqst *req,
				     struct xdr_stream *xdr,
				     struct nfs4_server_caps_arg *args)
L
Linus Torvalds 已提交
2594 2595
{
	struct compound_hdr hdr = {
2596
		.minorversion = nfs4_xdr_minorversion(&args->seq_args),
L
Linus Torvalds 已提交
2597 2598
	};

2599 2600 2601 2602
	encode_compound_hdr(xdr, req, &hdr);
	encode_sequence(xdr, &args->seq_args, &hdr);
	encode_putfh(xdr, args->fhandle, &hdr);
	encode_getattr_one(xdr, FATTR4_WORD0_SUPPORTED_ATTRS|
2603
			   FATTR4_WORD0_FH_EXPIRE_TYPE|
2604 2605 2606
			   FATTR4_WORD0_LINK_SUPPORT|
			   FATTR4_WORD0_SYMLINK_SUPPORT|
			   FATTR4_WORD0_ACLSUPPORT, &hdr);
2607
	encode_nops(&hdr);
L
Linus Torvalds 已提交
2608 2609 2610 2611 2612
}

/*
 * a RENEW request
 */
2613 2614
static void nfs4_xdr_enc_renew(struct rpc_rqst *req, struct xdr_stream *xdr,
			       struct nfs_client *clp)
L
Linus Torvalds 已提交
2615 2616
{
	struct compound_hdr hdr = {
2617
		.nops	= 0,
L
Linus Torvalds 已提交
2618 2619
	};

2620
	encode_compound_hdr(xdr, req, &hdr);
2621
	encode_renew(xdr, clp->cl_clientid, &hdr);
2622
	encode_nops(&hdr);
L
Linus Torvalds 已提交
2623 2624 2625 2626 2627
}

/*
 * a SETCLIENTID request
 */
2628 2629 2630
static void nfs4_xdr_enc_setclientid(struct rpc_rqst *req,
				     struct xdr_stream *xdr,
				     struct nfs4_setclientid *sc)
L
Linus Torvalds 已提交
2631 2632
{
	struct compound_hdr hdr = {
2633
		.nops	= 0,
L
Linus Torvalds 已提交
2634 2635
	};

2636 2637
	encode_compound_hdr(xdr, req, &hdr);
	encode_setclientid(xdr, sc, &hdr);
2638
	encode_nops(&hdr);
L
Linus Torvalds 已提交
2639 2640 2641 2642 2643
}

/*
 * a SETCLIENTID_CONFIRM request
 */
2644 2645 2646
static void nfs4_xdr_enc_setclientid_confirm(struct rpc_rqst *req,
					     struct xdr_stream *xdr,
					     struct nfs4_setclientid_res *arg)
L
Linus Torvalds 已提交
2647 2648
{
	struct compound_hdr hdr = {
2649
		.nops	= 0,
L
Linus Torvalds 已提交
2650 2651
	};

2652 2653
	encode_compound_hdr(xdr, req, &hdr);
	encode_setclientid_confirm(xdr, arg, &hdr);
2654
	encode_nops(&hdr);
L
Linus Torvalds 已提交
2655 2656 2657 2658 2659
}

/*
 * DELEGRETURN request
 */
2660 2661 2662
static void nfs4_xdr_enc_delegreturn(struct rpc_rqst *req,
				     struct xdr_stream *xdr,
				     const struct nfs4_delegreturnargs *args)
L
Linus Torvalds 已提交
2663 2664
{
	struct compound_hdr hdr = {
2665
		.minorversion = nfs4_xdr_minorversion(&args->seq_args),
L
Linus Torvalds 已提交
2666 2667
	};

2668 2669 2670 2671
	encode_compound_hdr(xdr, req, &hdr);
	encode_sequence(xdr, &args->seq_args, &hdr);
	encode_putfh(xdr, args->fhandle, &hdr);
	encode_getfattr(xdr, args->bitmask, &hdr);
2672
	encode_delegreturn(xdr, args->stateid, &hdr);
2673
	encode_nops(&hdr);
L
Linus Torvalds 已提交
2674 2675
}

2676 2677 2678
/*
 * Encode FS_LOCATIONS request
 */
2679 2680 2681
static void nfs4_xdr_enc_fs_locations(struct rpc_rqst *req,
				      struct xdr_stream *xdr,
				      struct nfs4_fs_locations_arg *args)
2682 2683
{
	struct compound_hdr hdr = {
2684
		.minorversion = nfs4_xdr_minorversion(&args->seq_args),
2685
	};
2686
	uint32_t replen;
2687

2688 2689 2690 2691
	encode_compound_hdr(xdr, req, &hdr);
	encode_sequence(xdr, &args->seq_args, &hdr);
	encode_putfh(xdr, args->dir_fh, &hdr);
	encode_lookup(xdr, args->name, &hdr);
2692
	replen = hdr.replen;	/* get the attribute into args->page */
2693
	encode_fs_locations(xdr, args->bitmask, &hdr);
2694

2695
	xdr_inline_pages(&req->rq_rcv_buf, replen << 2, &args->page,
2696
			0, PAGE_SIZE);
2697
	encode_nops(&hdr);
2698 2699
}

B
Bryan Schumaker 已提交
2700 2701 2702 2703 2704 2705 2706 2707 2708 2709 2710 2711 2712 2713 2714 2715 2716 2717
/*
 * Encode SECINFO request
 */
static void nfs4_xdr_enc_secinfo(struct rpc_rqst *req,
				struct xdr_stream *xdr,
				struct nfs4_secinfo_arg *args)
{
	struct compound_hdr hdr = {
		.minorversion = nfs4_xdr_minorversion(&args->seq_args),
	};

	encode_compound_hdr(xdr, req, &hdr);
	encode_sequence(xdr, &args->seq_args, &hdr);
	encode_putfh(xdr, args->dir_fh, &hdr);
	encode_secinfo(xdr, args->name, &hdr);
	encode_nops(&hdr);
}

B
Benny Halevy 已提交
2718
#if defined(CONFIG_NFS_V4_1)
2719 2720 2721 2722 2723 2724 2725 2726 2727 2728 2729 2730 2731 2732 2733 2734
/*
 * BIND_CONN_TO_SESSION request
 */
static void nfs4_xdr_enc_bind_conn_to_session(struct rpc_rqst *req,
				struct xdr_stream *xdr,
				struct nfs_client *clp)
{
	struct compound_hdr hdr = {
		.minorversion = clp->cl_mvops->minor_version,
	};

	encode_compound_hdr(xdr, req, &hdr);
	encode_bind_conn_to_session(xdr, clp->cl_session, &hdr);
	encode_nops(&hdr);
}

B
Benny Halevy 已提交
2735 2736 2737
/*
 * EXCHANGE_ID request
 */
2738 2739 2740
static void nfs4_xdr_enc_exchange_id(struct rpc_rqst *req,
				     struct xdr_stream *xdr,
				     struct nfs41_exchange_id_args *args)
B
Benny Halevy 已提交
2741 2742
{
	struct compound_hdr hdr = {
2743
		.minorversion = args->client->cl_mvops->minor_version,
B
Benny Halevy 已提交
2744 2745
	};

2746 2747
	encode_compound_hdr(xdr, req, &hdr);
	encode_exchange_id(xdr, args, &hdr);
B
Benny Halevy 已提交
2748 2749
	encode_nops(&hdr);
}
A
Andy Adamson 已提交
2750

A
Andy Adamson 已提交
2751 2752 2753
/*
 * a CREATE_SESSION request
 */
2754 2755 2756
static void nfs4_xdr_enc_create_session(struct rpc_rqst *req,
					struct xdr_stream *xdr,
					struct nfs41_create_session_args *args)
A
Andy Adamson 已提交
2757 2758
{
	struct compound_hdr hdr = {
2759
		.minorversion = args->client->cl_mvops->minor_version,
A
Andy Adamson 已提交
2760 2761
	};

2762 2763
	encode_compound_hdr(xdr, req, &hdr);
	encode_create_session(xdr, args, &hdr);
A
Andy Adamson 已提交
2764 2765 2766
	encode_nops(&hdr);
}

A
Andy Adamson 已提交
2767 2768 2769
/*
 * a DESTROY_SESSION request
 */
2770 2771 2772
static void nfs4_xdr_enc_destroy_session(struct rpc_rqst *req,
					 struct xdr_stream *xdr,
					 struct nfs4_session *session)
A
Andy Adamson 已提交
2773 2774
{
	struct compound_hdr hdr = {
2775
		.minorversion = session->clp->cl_mvops->minor_version,
A
Andy Adamson 已提交
2776 2777
	};

2778 2779
	encode_compound_hdr(xdr, req, &hdr);
	encode_destroy_session(xdr, session, &hdr);
A
Andy Adamson 已提交
2780 2781 2782
	encode_nops(&hdr);
}

T
Trond Myklebust 已提交
2783 2784 2785 2786 2787 2788 2789 2790 2791 2792 2793 2794 2795 2796 2797 2798
/*
 * a DESTROY_CLIENTID request
 */
static void nfs4_xdr_enc_destroy_clientid(struct rpc_rqst *req,
					 struct xdr_stream *xdr,
					 struct nfs_client *clp)
{
	struct compound_hdr hdr = {
		.minorversion = clp->cl_mvops->minor_version,
	};

	encode_compound_hdr(xdr, req, &hdr);
	encode_destroy_clientid(xdr, clp->cl_clientid, &hdr);
	encode_nops(&hdr);
}

A
Andy Adamson 已提交
2799 2800 2801
/*
 * a SEQUENCE request
 */
2802 2803
static void nfs4_xdr_enc_sequence(struct rpc_rqst *req, struct xdr_stream *xdr,
				  struct nfs4_sequence_args *args)
A
Andy Adamson 已提交
2804 2805 2806 2807 2808
{
	struct compound_hdr hdr = {
		.minorversion = nfs4_xdr_minorversion(args),
	};

2809 2810
	encode_compound_hdr(xdr, req, &hdr);
	encode_sequence(xdr, args, &hdr);
A
Andy Adamson 已提交
2811 2812 2813
	encode_nops(&hdr);
}

A
Andy Adamson 已提交
2814 2815 2816
/*
 * a GET_LEASE_TIME request
 */
2817 2818 2819
static void nfs4_xdr_enc_get_lease_time(struct rpc_rqst *req,
					struct xdr_stream *xdr,
					struct nfs4_get_lease_time_args *args)
A
Andy Adamson 已提交
2820 2821 2822 2823
{
	struct compound_hdr hdr = {
		.minorversion = nfs4_xdr_minorversion(&args->la_seq_args),
	};
2824
	const u32 lease_bitmap[3] = { FATTR4_WORD0_LEASE_TIME };
A
Andy Adamson 已提交
2825

2826 2827 2828 2829
	encode_compound_hdr(xdr, req, &hdr);
	encode_sequence(xdr, &args->la_seq_args, &hdr);
	encode_putrootfh(xdr, &hdr);
	encode_fsinfo(xdr, lease_bitmap, &hdr);
A
Andy Adamson 已提交
2830 2831
	encode_nops(&hdr);
}
2832 2833 2834 2835

/*
 * a RECLAIM_COMPLETE request
 */
2836 2837 2838
static void nfs4_xdr_enc_reclaim_complete(struct rpc_rqst *req,
					  struct xdr_stream *xdr,
				struct nfs41_reclaim_complete_args *args)
2839 2840 2841 2842 2843
{
	struct compound_hdr hdr = {
		.minorversion = nfs4_xdr_minorversion(&args->seq_args)
	};

2844 2845 2846
	encode_compound_hdr(xdr, req, &hdr);
	encode_sequence(xdr, &args->seq_args, &hdr);
	encode_reclaim_complete(xdr, args, &hdr);
2847 2848 2849
	encode_nops(&hdr);
}

A
Andy Adamson 已提交
2850 2851 2852 2853 2854 2855 2856 2857 2858 2859 2860 2861 2862 2863 2864 2865 2866 2867
/*
 * Encode GETDEVICELIST request
 */
static void nfs4_xdr_enc_getdevicelist(struct rpc_rqst *req,
				       struct xdr_stream *xdr,
				       struct nfs4_getdevicelist_args *args)
{
	struct compound_hdr hdr = {
		.minorversion = nfs4_xdr_minorversion(&args->seq_args),
	};

	encode_compound_hdr(xdr, req, &hdr);
	encode_sequence(xdr, &args->seq_args, &hdr);
	encode_putfh(xdr, args->fh, &hdr);
	encode_getdevicelist(xdr, args, &hdr);
	encode_nops(&hdr);
}

2868 2869 2870
/*
 * Encode GETDEVICEINFO request
 */
2871 2872 2873
static void nfs4_xdr_enc_getdeviceinfo(struct rpc_rqst *req,
				       struct xdr_stream *xdr,
				       struct nfs4_getdeviceinfo_args *args)
2874 2875 2876 2877 2878
{
	struct compound_hdr hdr = {
		.minorversion = nfs4_xdr_minorversion(&args->seq_args),
	};

2879 2880 2881
	encode_compound_hdr(xdr, req, &hdr);
	encode_sequence(xdr, &args->seq_args, &hdr);
	encode_getdeviceinfo(xdr, args, &hdr);
2882 2883 2884 2885 2886 2887 2888 2889 2890 2891 2892 2893 2894

	/* set up reply kvec. Subtract notification bitmap max size (2)
	 * so that notification bitmap is put in xdr_buf tail */
	xdr_inline_pages(&req->rq_rcv_buf, (hdr.replen - 2) << 2,
			 args->pdev->pages, args->pdev->pgbase,
			 args->pdev->pglen);

	encode_nops(&hdr);
}

/*
 *  Encode LAYOUTGET request
 */
2895 2896 2897
static void nfs4_xdr_enc_layoutget(struct rpc_rqst *req,
				   struct xdr_stream *xdr,
				   struct nfs4_layoutget_args *args)
2898 2899 2900 2901 2902
{
	struct compound_hdr hdr = {
		.minorversion = nfs4_xdr_minorversion(&args->seq_args),
	};

2903 2904 2905 2906
	encode_compound_hdr(xdr, req, &hdr);
	encode_sequence(xdr, &args->seq_args, &hdr);
	encode_putfh(xdr, NFS_FH(args->inode), &hdr);
	encode_layoutget(xdr, args, &hdr);
2907 2908 2909 2910

	xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2,
	    args->layout.pages, 0, args->layout.pglen);

2911 2912
	encode_nops(&hdr);
}
A
Andy Adamson 已提交
2913 2914 2915 2916

/*
 *  Encode LAYOUTCOMMIT request
 */
B
Benny Halevy 已提交
2917 2918 2919
static void nfs4_xdr_enc_layoutcommit(struct rpc_rqst *req,
				      struct xdr_stream *xdr,
				      struct nfs4_layoutcommit_args *args)
A
Andy Adamson 已提交
2920
{
B
Benny Halevy 已提交
2921 2922
	struct nfs4_layoutcommit_data *data =
		container_of(args, struct nfs4_layoutcommit_data, args);
A
Andy Adamson 已提交
2923 2924 2925 2926 2927 2928 2929
	struct compound_hdr hdr = {
		.minorversion = nfs4_xdr_minorversion(&args->seq_args),
	};

	encode_compound_hdr(xdr, req, &hdr);
	encode_sequence(xdr, &args->seq_args, &hdr);
	encode_putfh(xdr, NFS_FH(args->inode), &hdr);
B
Benny Halevy 已提交
2930
	encode_layoutcommit(xdr, data->args.inode, args, &hdr);
A
Andy Adamson 已提交
2931
	encode_getfattr(xdr, args->bitmask, &hdr);
2932
	encode_nops(&hdr);
B
Benny Halevy 已提交
2933 2934 2935 2936 2937 2938 2939 2940 2941 2942 2943 2944 2945 2946 2947 2948 2949 2950
}

/*
 * Encode LAYOUTRETURN request
 */
static void nfs4_xdr_enc_layoutreturn(struct rpc_rqst *req,
				      struct xdr_stream *xdr,
				      struct nfs4_layoutreturn_args *args)
{
	struct compound_hdr hdr = {
		.minorversion = nfs4_xdr_minorversion(&args->seq_args),
	};

	encode_compound_hdr(xdr, req, &hdr);
	encode_sequence(xdr, &args->seq_args, &hdr);
	encode_putfh(xdr, NFS_FH(args->inode), &hdr);
	encode_layoutreturn(xdr, args, &hdr);
	encode_nops(&hdr);
2951
}
2952 2953 2954 2955 2956 2957 2958 2959 2960 2961 2962 2963 2964 2965 2966 2967 2968 2969 2970

/*
 * Encode SECINFO_NO_NAME request
 */
static int nfs4_xdr_enc_secinfo_no_name(struct rpc_rqst *req,
					struct xdr_stream *xdr,
					struct nfs41_secinfo_no_name_args *args)
{
	struct compound_hdr hdr = {
		.minorversion = nfs4_xdr_minorversion(&args->seq_args),
	};

	encode_compound_hdr(xdr, req, &hdr);
	encode_sequence(xdr, &args->seq_args, &hdr);
	encode_putrootfh(xdr, &hdr);
	encode_secinfo_no_name(xdr, args, &hdr);
	encode_nops(&hdr);
	return 0;
}
B
Bryan Schumaker 已提交
2971 2972 2973 2974 2975 2976 2977 2978 2979 2980 2981 2982 2983 2984 2985 2986 2987

/*
 *  Encode TEST_STATEID request
 */
static void nfs4_xdr_enc_test_stateid(struct rpc_rqst *req,
				      struct xdr_stream *xdr,
				      struct nfs41_test_stateid_args *args)
{
	struct compound_hdr hdr = {
		.minorversion = nfs4_xdr_minorversion(&args->seq_args),
	};

	encode_compound_hdr(xdr, req, &hdr);
	encode_sequence(xdr, &args->seq_args, &hdr);
	encode_test_stateid(xdr, args, &hdr);
	encode_nops(&hdr);
}
B
Bryan Schumaker 已提交
2988 2989 2990 2991 2992 2993 2994 2995 2996 2997 2998 2999 3000 3001 3002 3003 3004

/*
 *  Encode FREE_STATEID request
 */
static void nfs4_xdr_enc_free_stateid(struct rpc_rqst *req,
				     struct xdr_stream *xdr,
				     struct nfs41_free_stateid_args *args)
{
	struct compound_hdr hdr = {
		.minorversion = nfs4_xdr_minorversion(&args->seq_args),
	};

	encode_compound_hdr(xdr, req, &hdr);
	encode_sequence(xdr, &args->seq_args, &hdr);
	encode_free_stateid(xdr, args, &hdr);
	encode_nops(&hdr);
}
B
Benny Halevy 已提交
3005 3006
#endif /* CONFIG_NFS_V4_1 */

3007 3008 3009 3010 3011 3012
static void print_overflow_msg(const char *func, const struct xdr_stream *xdr)
{
	dprintk("nfs: %s: prematurely hit end of receive buffer. "
		"Remaining buffer length is %tu words.\n",
		func, xdr->end - xdr->p);
}
L
Linus Torvalds 已提交
3013

3014
static int decode_opaque_inline(struct xdr_stream *xdr, unsigned int *len, char **string)
L
Linus Torvalds 已提交
3015
{
A
Al Viro 已提交
3016
	__be32 *p;
L
Linus Torvalds 已提交
3017

B
Benny Halevy 已提交
3018 3019 3020
	p = xdr_inline_decode(xdr, 4);
	if (unlikely(!p))
		goto out_overflow;
3021
	*len = be32_to_cpup(p);
B
Benny Halevy 已提交
3022 3023 3024
	p = xdr_inline_decode(xdr, *len);
	if (unlikely(!p))
		goto out_overflow;
L
Linus Torvalds 已提交
3025 3026
	*string = (char *)p;
	return 0;
B
Benny Halevy 已提交
3027 3028 3029
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
L
Linus Torvalds 已提交
3030 3031 3032 3033
}

static int decode_compound_hdr(struct xdr_stream *xdr, struct compound_hdr *hdr)
{
A
Al Viro 已提交
3034
	__be32 *p;
L
Linus Torvalds 已提交
3035

B
Benny Halevy 已提交
3036 3037 3038
	p = xdr_inline_decode(xdr, 8);
	if (unlikely(!p))
		goto out_overflow;
B
Benny Halevy 已提交
3039
	hdr->status = be32_to_cpup(p++);
3040
	hdr->taglen = be32_to_cpup(p);
3041

B
Benny Halevy 已提交
3042 3043 3044
	p = xdr_inline_decode(xdr, hdr->taglen + 4);
	if (unlikely(!p))
		goto out_overflow;
L
Linus Torvalds 已提交
3045 3046
	hdr->tag = (char *)p;
	p += XDR_QUADLEN(hdr->taglen);
3047
	hdr->nops = be32_to_cpup(p);
3048 3049
	if (unlikely(hdr->nops < 1))
		return nfs4_stat_to_errno(hdr->status);
L
Linus Torvalds 已提交
3050
	return 0;
B
Benny Halevy 已提交
3051 3052 3053
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
L
Linus Torvalds 已提交
3054 3055 3056 3057
}

static int decode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 expected)
{
A
Al Viro 已提交
3058
	__be32 *p;
L
Linus Torvalds 已提交
3059 3060 3061
	uint32_t opnum;
	int32_t nfserr;

B
Benny Halevy 已提交
3062 3063 3064
	p = xdr_inline_decode(xdr, 8);
	if (unlikely(!p))
		goto out_overflow;
B
Benny Halevy 已提交
3065
	opnum = be32_to_cpup(p++);
L
Linus Torvalds 已提交
3066
	if (opnum != expected) {
3067 3068
		dprintk("nfs: Server returned operation"
			" %d but we issued a request for %d\n",
L
Linus Torvalds 已提交
3069 3070 3071
				opnum, expected);
		return -EIO;
	}
3072
	nfserr = be32_to_cpup(p);
L
Linus Torvalds 已提交
3073
	if (nfserr != NFS_OK)
3074
		return nfs4_stat_to_errno(nfserr);
L
Linus Torvalds 已提交
3075
	return 0;
B
Benny Halevy 已提交
3076 3077 3078
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
L
Linus Torvalds 已提交
3079 3080 3081
}

/* Dummy routine */
3082
static int decode_ace(struct xdr_stream *xdr, void *ace, struct nfs_client *clp)
L
Linus Torvalds 已提交
3083
{
A
Al Viro 已提交
3084
	__be32 *p;
3085
	unsigned int strlen;
L
Linus Torvalds 已提交
3086 3087
	char *str;

B
Benny Halevy 已提交
3088 3089 3090 3091 3092
	p = xdr_inline_decode(xdr, 12);
	if (likely(p))
		return decode_opaque_inline(xdr, &strlen, &str);
	print_overflow_msg(__func__, xdr);
	return -EIO;
L
Linus Torvalds 已提交
3093 3094 3095 3096
}

static int decode_attr_bitmap(struct xdr_stream *xdr, uint32_t *bitmap)
{
A
Al Viro 已提交
3097 3098
	uint32_t bmlen;
	__be32 *p;
L
Linus Torvalds 已提交
3099

B
Benny Halevy 已提交
3100 3101 3102
	p = xdr_inline_decode(xdr, 4);
	if (unlikely(!p))
		goto out_overflow;
3103
	bmlen = be32_to_cpup(p);
L
Linus Torvalds 已提交
3104

3105
	bitmap[0] = bitmap[1] = bitmap[2] = 0;
B
Benny Halevy 已提交
3106 3107 3108
	p = xdr_inline_decode(xdr, (bmlen << 2));
	if (unlikely(!p))
		goto out_overflow;
L
Linus Torvalds 已提交
3109
	if (bmlen > 0) {
B
Benny Halevy 已提交
3110
		bitmap[0] = be32_to_cpup(p++);
3111 3112 3113 3114 3115
		if (bmlen > 1) {
			bitmap[1] = be32_to_cpup(p++);
			if (bmlen > 2)
				bitmap[2] = be32_to_cpup(p);
		}
L
Linus Torvalds 已提交
3116 3117
	}
	return 0;
B
Benny Halevy 已提交
3118 3119 3120
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
L
Linus Torvalds 已提交
3121 3122
}

3123
static int decode_attr_length(struct xdr_stream *xdr, uint32_t *attrlen, unsigned int *savep)
L
Linus Torvalds 已提交
3124
{
A
Al Viro 已提交
3125
	__be32 *p;
L
Linus Torvalds 已提交
3126

B
Benny Halevy 已提交
3127 3128 3129
	p = xdr_inline_decode(xdr, 4);
	if (unlikely(!p))
		goto out_overflow;
3130
	*attrlen = be32_to_cpup(p);
3131
	*savep = xdr_stream_pos(xdr);
L
Linus Torvalds 已提交
3132
	return 0;
B
Benny Halevy 已提交
3133 3134 3135
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
L
Linus Torvalds 已提交
3136 3137 3138 3139 3140
}

static int decode_attr_supported(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *bitmask)
{
	if (likely(bitmap[0] & FATTR4_WORD0_SUPPORTED_ATTRS)) {
R
Roman Borisov 已提交
3141 3142 3143 3144
		int ret;
		ret = decode_attr_bitmap(xdr, bitmask);
		if (unlikely(ret < 0))
			return ret;
L
Linus Torvalds 已提交
3145 3146
		bitmap[0] &= ~FATTR4_WORD0_SUPPORTED_ATTRS;
	} else
3147 3148 3149
		bitmask[0] = bitmask[1] = bitmask[2] = 0;
	dprintk("%s: bitmask=%08x:%08x:%08x\n", __func__,
		bitmask[0], bitmask[1], bitmask[2]);
L
Linus Torvalds 已提交
3150 3151 3152 3153 3154
	return 0;
}

static int decode_attr_type(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *type)
{
A
Al Viro 已提交
3155
	__be32 *p;
3156
	int ret = 0;
L
Linus Torvalds 已提交
3157 3158 3159 3160 3161

	*type = 0;
	if (unlikely(bitmap[0] & (FATTR4_WORD0_TYPE - 1U)))
		return -EIO;
	if (likely(bitmap[0] & FATTR4_WORD0_TYPE)) {
B
Benny Halevy 已提交
3162 3163 3164
		p = xdr_inline_decode(xdr, 4);
		if (unlikely(!p))
			goto out_overflow;
3165
		*type = be32_to_cpup(p);
L
Linus Torvalds 已提交
3166
		if (*type < NF4REG || *type > NF4NAMEDATTR) {
3167
			dprintk("%s: bad type %d\n", __func__, *type);
L
Linus Torvalds 已提交
3168 3169 3170
			return -EIO;
		}
		bitmap[0] &= ~FATTR4_WORD0_TYPE;
3171
		ret = NFS_ATTR_FATTR_TYPE;
L
Linus Torvalds 已提交
3172
	}
3173
	dprintk("%s: type=0%o\n", __func__, nfs_type2fmt[*type]);
3174
	return ret;
B
Benny Halevy 已提交
3175 3176 3177
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
L
Linus Torvalds 已提交
3178 3179
}

3180 3181 3182 3183 3184 3185 3186 3187 3188 3189 3190 3191 3192 3193 3194 3195 3196 3197 3198 3199 3200 3201
static int decode_attr_fh_expire_type(struct xdr_stream *xdr,
				      uint32_t *bitmap, uint32_t *type)
{
	__be32 *p;

	*type = 0;
	if (unlikely(bitmap[0] & (FATTR4_WORD0_FH_EXPIRE_TYPE - 1U)))
		return -EIO;
	if (likely(bitmap[0] & FATTR4_WORD0_FH_EXPIRE_TYPE)) {
		p = xdr_inline_decode(xdr, 4);
		if (unlikely(!p))
			goto out_overflow;
		*type = be32_to_cpup(p);
		bitmap[0] &= ~FATTR4_WORD0_FH_EXPIRE_TYPE;
	}
	dprintk("%s: expire type=0x%x\n", __func__, *type);
	return 0;
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
}

L
Linus Torvalds 已提交
3202 3203
static int decode_attr_change(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *change)
{
A
Al Viro 已提交
3204
	__be32 *p;
3205
	int ret = 0;
L
Linus Torvalds 已提交
3206 3207 3208 3209 3210

	*change = 0;
	if (unlikely(bitmap[0] & (FATTR4_WORD0_CHANGE - 1U)))
		return -EIO;
	if (likely(bitmap[0] & FATTR4_WORD0_CHANGE)) {
B
Benny Halevy 已提交
3211 3212 3213
		p = xdr_inline_decode(xdr, 8);
		if (unlikely(!p))
			goto out_overflow;
3214
		xdr_decode_hyper(p, change);
L
Linus Torvalds 已提交
3215
		bitmap[0] &= ~FATTR4_WORD0_CHANGE;
3216
		ret = NFS_ATTR_FATTR_CHANGE;
L
Linus Torvalds 已提交
3217
	}
3218
	dprintk("%s: change attribute=%Lu\n", __func__,
L
Linus Torvalds 已提交
3219
			(unsigned long long)*change);
3220
	return ret;
B
Benny Halevy 已提交
3221 3222 3223
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
L
Linus Torvalds 已提交
3224 3225 3226 3227
}

static int decode_attr_size(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *size)
{
A
Al Viro 已提交
3228
	__be32 *p;
3229
	int ret = 0;
L
Linus Torvalds 已提交
3230 3231 3232 3233 3234

	*size = 0;
	if (unlikely(bitmap[0] & (FATTR4_WORD0_SIZE - 1U)))
		return -EIO;
	if (likely(bitmap[0] & FATTR4_WORD0_SIZE)) {
B
Benny Halevy 已提交
3235 3236 3237
		p = xdr_inline_decode(xdr, 8);
		if (unlikely(!p))
			goto out_overflow;
3238
		xdr_decode_hyper(p, size);
L
Linus Torvalds 已提交
3239
		bitmap[0] &= ~FATTR4_WORD0_SIZE;
3240
		ret = NFS_ATTR_FATTR_SIZE;
L
Linus Torvalds 已提交
3241
	}
3242
	dprintk("%s: file size=%Lu\n", __func__, (unsigned long long)*size);
3243
	return ret;
B
Benny Halevy 已提交
3244 3245 3246
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
L
Linus Torvalds 已提交
3247 3248 3249 3250
}

static int decode_attr_link_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
{
A
Al Viro 已提交
3251
	__be32 *p;
L
Linus Torvalds 已提交
3252 3253 3254 3255 3256

	*res = 0;
	if (unlikely(bitmap[0] & (FATTR4_WORD0_LINK_SUPPORT - 1U)))
		return -EIO;
	if (likely(bitmap[0] & FATTR4_WORD0_LINK_SUPPORT)) {
B
Benny Halevy 已提交
3257 3258 3259
		p = xdr_inline_decode(xdr, 4);
		if (unlikely(!p))
			goto out_overflow;
3260
		*res = be32_to_cpup(p);
L
Linus Torvalds 已提交
3261 3262
		bitmap[0] &= ~FATTR4_WORD0_LINK_SUPPORT;
	}
3263
	dprintk("%s: link support=%s\n", __func__, *res == 0 ? "false" : "true");
L
Linus Torvalds 已提交
3264
	return 0;
B
Benny Halevy 已提交
3265 3266 3267
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
L
Linus Torvalds 已提交
3268 3269 3270 3271
}

static int decode_attr_symlink_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
{
A
Al Viro 已提交
3272
	__be32 *p;
L
Linus Torvalds 已提交
3273 3274 3275 3276 3277

	*res = 0;
	if (unlikely(bitmap[0] & (FATTR4_WORD0_SYMLINK_SUPPORT - 1U)))
		return -EIO;
	if (likely(bitmap[0] & FATTR4_WORD0_SYMLINK_SUPPORT)) {
B
Benny Halevy 已提交
3278 3279 3280
		p = xdr_inline_decode(xdr, 4);
		if (unlikely(!p))
			goto out_overflow;
3281
		*res = be32_to_cpup(p);
L
Linus Torvalds 已提交
3282 3283
		bitmap[0] &= ~FATTR4_WORD0_SYMLINK_SUPPORT;
	}
3284
	dprintk("%s: symlink support=%s\n", __func__, *res == 0 ? "false" : "true");
L
Linus Torvalds 已提交
3285
	return 0;
B
Benny Halevy 已提交
3286 3287 3288
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
L
Linus Torvalds 已提交
3289 3290
}

3291
static int decode_attr_fsid(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_fsid *fsid)
L
Linus Torvalds 已提交
3292
{
A
Al Viro 已提交
3293
	__be32 *p;
3294
	int ret = 0;
L
Linus Torvalds 已提交
3295 3296 3297 3298 3299 3300

	fsid->major = 0;
	fsid->minor = 0;
	if (unlikely(bitmap[0] & (FATTR4_WORD0_FSID - 1U)))
		return -EIO;
	if (likely(bitmap[0] & FATTR4_WORD0_FSID)) {
B
Benny Halevy 已提交
3301 3302 3303
		p = xdr_inline_decode(xdr, 16);
		if (unlikely(!p))
			goto out_overflow;
B
Benny Halevy 已提交
3304
		p = xdr_decode_hyper(p, &fsid->major);
3305
		xdr_decode_hyper(p, &fsid->minor);
L
Linus Torvalds 已提交
3306
		bitmap[0] &= ~FATTR4_WORD0_FSID;
3307
		ret = NFS_ATTR_FATTR_FSID;
L
Linus Torvalds 已提交
3308
	}
3309
	dprintk("%s: fsid=(0x%Lx/0x%Lx)\n", __func__,
L
Linus Torvalds 已提交
3310 3311
			(unsigned long long)fsid->major,
			(unsigned long long)fsid->minor);
3312
	return ret;
B
Benny Halevy 已提交
3313 3314 3315
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
L
Linus Torvalds 已提交
3316 3317 3318 3319
}

static int decode_attr_lease_time(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
{
A
Al Viro 已提交
3320
	__be32 *p;
L
Linus Torvalds 已提交
3321 3322 3323 3324 3325

	*res = 60;
	if (unlikely(bitmap[0] & (FATTR4_WORD0_LEASE_TIME - 1U)))
		return -EIO;
	if (likely(bitmap[0] & FATTR4_WORD0_LEASE_TIME)) {
B
Benny Halevy 已提交
3326 3327 3328
		p = xdr_inline_decode(xdr, 4);
		if (unlikely(!p))
			goto out_overflow;
3329
		*res = be32_to_cpup(p);
L
Linus Torvalds 已提交
3330 3331
		bitmap[0] &= ~FATTR4_WORD0_LEASE_TIME;
	}
3332
	dprintk("%s: file size=%u\n", __func__, (unsigned int)*res);
L
Linus Torvalds 已提交
3333
	return 0;
B
Benny Halevy 已提交
3334 3335 3336
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
L
Linus Torvalds 已提交
3337 3338
}

3339
static int decode_attr_error(struct xdr_stream *xdr, uint32_t *bitmap, int32_t *res)
3340 3341 3342 3343 3344 3345 3346 3347 3348 3349
{
	__be32 *p;

	if (unlikely(bitmap[0] & (FATTR4_WORD0_RDATTR_ERROR - 1U)))
		return -EIO;
	if (likely(bitmap[0] & FATTR4_WORD0_RDATTR_ERROR)) {
		p = xdr_inline_decode(xdr, 4);
		if (unlikely(!p))
			goto out_overflow;
		bitmap[0] &= ~FATTR4_WORD0_RDATTR_ERROR;
3350
		*res = -be32_to_cpup(p);
3351 3352 3353 3354 3355 3356 3357 3358 3359 3360 3361 3362
	}
	return 0;
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
}

static int decode_attr_filehandle(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_fh *fh)
{
	__be32 *p;
	int len;

3363 3364
	if (fh != NULL)
		memset(fh, 0, sizeof(*fh));
3365 3366 3367 3368 3369 3370 3371 3372 3373 3374 3375 3376 3377

	if (unlikely(bitmap[0] & (FATTR4_WORD0_FILEHANDLE - 1U)))
		return -EIO;
	if (likely(bitmap[0] & FATTR4_WORD0_FILEHANDLE)) {
		p = xdr_inline_decode(xdr, 4);
		if (unlikely(!p))
			goto out_overflow;
		len = be32_to_cpup(p);
		if (len > NFS4_FHSIZE)
			return -EIO;
		p = xdr_inline_decode(xdr, len);
		if (unlikely(!p))
			goto out_overflow;
3378 3379 3380 3381
		if (fh != NULL) {
			memcpy(fh->data, p, len);
			fh->size = len;
		}
3382 3383 3384 3385 3386 3387 3388 3389
		bitmap[0] &= ~FATTR4_WORD0_FILEHANDLE;
	}
	return 0;
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
}

L
Linus Torvalds 已提交
3390 3391
static int decode_attr_aclsupport(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
{
A
Al Viro 已提交
3392
	__be32 *p;
L
Linus Torvalds 已提交
3393 3394 3395 3396 3397

	*res = ACL4_SUPPORT_ALLOW_ACL|ACL4_SUPPORT_DENY_ACL;
	if (unlikely(bitmap[0] & (FATTR4_WORD0_ACLSUPPORT - 1U)))
		return -EIO;
	if (likely(bitmap[0] & FATTR4_WORD0_ACLSUPPORT)) {
B
Benny Halevy 已提交
3398 3399 3400
		p = xdr_inline_decode(xdr, 4);
		if (unlikely(!p))
			goto out_overflow;
3401
		*res = be32_to_cpup(p);
L
Linus Torvalds 已提交
3402 3403
		bitmap[0] &= ~FATTR4_WORD0_ACLSUPPORT;
	}
3404
	dprintk("%s: ACLs supported=%u\n", __func__, (unsigned int)*res);
L
Linus Torvalds 已提交
3405
	return 0;
B
Benny Halevy 已提交
3406 3407 3408
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
L
Linus Torvalds 已提交
3409 3410 3411 3412
}

static int decode_attr_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
{
A
Al Viro 已提交
3413
	__be32 *p;
3414
	int ret = 0;
L
Linus Torvalds 已提交
3415 3416 3417 3418 3419

	*fileid = 0;
	if (unlikely(bitmap[0] & (FATTR4_WORD0_FILEID - 1U)))
		return -EIO;
	if (likely(bitmap[0] & FATTR4_WORD0_FILEID)) {
B
Benny Halevy 已提交
3420 3421 3422
		p = xdr_inline_decode(xdr, 8);
		if (unlikely(!p))
			goto out_overflow;
3423
		xdr_decode_hyper(p, fileid);
L
Linus Torvalds 已提交
3424
		bitmap[0] &= ~FATTR4_WORD0_FILEID;
3425
		ret = NFS_ATTR_FATTR_FILEID;
L
Linus Torvalds 已提交
3426
	}
3427
	dprintk("%s: fileid=%Lu\n", __func__, (unsigned long long)*fileid);
3428
	return ret;
B
Benny Halevy 已提交
3429 3430 3431
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
L
Linus Torvalds 已提交
3432 3433
}

3434 3435
static int decode_attr_mounted_on_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
{
A
Al Viro 已提交
3436
	__be32 *p;
3437
	int ret = 0;
3438 3439 3440 3441 3442

	*fileid = 0;
	if (unlikely(bitmap[1] & (FATTR4_WORD1_MOUNTED_ON_FILEID - 1U)))
		return -EIO;
	if (likely(bitmap[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)) {
B
Benny Halevy 已提交
3443 3444 3445
		p = xdr_inline_decode(xdr, 8);
		if (unlikely(!p))
			goto out_overflow;
3446
		xdr_decode_hyper(p, fileid);
3447
		bitmap[1] &= ~FATTR4_WORD1_MOUNTED_ON_FILEID;
3448
		ret = NFS_ATTR_FATTR_MOUNTED_ON_FILEID;
3449
	}
3450
	dprintk("%s: fileid=%Lu\n", __func__, (unsigned long long)*fileid);
3451
	return ret;
B
Benny Halevy 已提交
3452 3453 3454
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
3455 3456
}

L
Linus Torvalds 已提交
3457 3458
static int decode_attr_files_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
{
A
Al Viro 已提交
3459
	__be32 *p;
L
Linus Torvalds 已提交
3460 3461 3462 3463 3464 3465
	int status = 0;

	*res = 0;
	if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_AVAIL - 1U)))
		return -EIO;
	if (likely(bitmap[0] & FATTR4_WORD0_FILES_AVAIL)) {
B
Benny Halevy 已提交
3466 3467 3468
		p = xdr_inline_decode(xdr, 8);
		if (unlikely(!p))
			goto out_overflow;
3469
		xdr_decode_hyper(p, res);
L
Linus Torvalds 已提交
3470 3471
		bitmap[0] &= ~FATTR4_WORD0_FILES_AVAIL;
	}
3472
	dprintk("%s: files avail=%Lu\n", __func__, (unsigned long long)*res);
L
Linus Torvalds 已提交
3473
	return status;
B
Benny Halevy 已提交
3474 3475 3476
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
L
Linus Torvalds 已提交
3477 3478 3479 3480
}

static int decode_attr_files_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
{
A
Al Viro 已提交
3481
	__be32 *p;
L
Linus Torvalds 已提交
3482 3483 3484 3485 3486 3487
	int status = 0;

	*res = 0;
	if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_FREE - 1U)))
		return -EIO;
	if (likely(bitmap[0] & FATTR4_WORD0_FILES_FREE)) {
B
Benny Halevy 已提交
3488 3489 3490
		p = xdr_inline_decode(xdr, 8);
		if (unlikely(!p))
			goto out_overflow;
3491
		xdr_decode_hyper(p, res);
L
Linus Torvalds 已提交
3492 3493
		bitmap[0] &= ~FATTR4_WORD0_FILES_FREE;
	}
3494
	dprintk("%s: files free=%Lu\n", __func__, (unsigned long long)*res);
L
Linus Torvalds 已提交
3495
	return status;
B
Benny Halevy 已提交
3496 3497 3498
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
L
Linus Torvalds 已提交
3499 3500 3501 3502
}

static int decode_attr_files_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
{
A
Al Viro 已提交
3503
	__be32 *p;
L
Linus Torvalds 已提交
3504 3505 3506 3507 3508 3509
	int status = 0;

	*res = 0;
	if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_TOTAL - 1U)))
		return -EIO;
	if (likely(bitmap[0] & FATTR4_WORD0_FILES_TOTAL)) {
B
Benny Halevy 已提交
3510 3511 3512
		p = xdr_inline_decode(xdr, 8);
		if (unlikely(!p))
			goto out_overflow;
3513
		xdr_decode_hyper(p, res);
L
Linus Torvalds 已提交
3514 3515
		bitmap[0] &= ~FATTR4_WORD0_FILES_TOTAL;
	}
3516
	dprintk("%s: files total=%Lu\n", __func__, (unsigned long long)*res);
L
Linus Torvalds 已提交
3517
	return status;
B
Benny Halevy 已提交
3518 3519 3520
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
L
Linus Torvalds 已提交
3521 3522
}

3523 3524
static int decode_pathname(struct xdr_stream *xdr, struct nfs4_pathname *path)
{
3525
	u32 n;
A
Al Viro 已提交
3526
	__be32 *p;
3527 3528
	int status = 0;

B
Benny Halevy 已提交
3529 3530 3531
	p = xdr_inline_decode(xdr, 4);
	if (unlikely(!p))
		goto out_overflow;
3532
	n = be32_to_cpup(p);
3533 3534
	if (n == 0)
		goto root_path;
3535
	dprintk("pathname4: ");
3536 3537 3538 3539 3540
	if (n > NFS4_PATHNAME_MAXCOMPONENTS) {
		dprintk("cannot parse %d components in path\n", n);
		goto out_eio;
	}
	for (path->ncomponents = 0; path->ncomponents < n; path->ncomponents++) {
3541 3542 3543 3544
		struct nfs4_string *component = &path->components[path->ncomponents];
		status = decode_opaque_inline(xdr, &component->len, &component->data);
		if (unlikely(status != 0))
			goto out_eio;
3545
		ifdebug (XDR)
3546 3547 3548
			pr_cont("%s%.*s ",
				(path->ncomponents != n ? "/ " : ""),
				component->len, component->data);
3549 3550 3551
	}
out:
	return status;
3552 3553 3554 3555 3556
root_path:
/* a root pathname is sent as a zero component4 */
	path->ncomponents = 1;
	path->components[0].len=0;
	path->components[0].data=NULL;
3557
	dprintk("pathname4: /\n");
3558
	goto out;
3559 3560 3561 3562
out_eio:
	dprintk(" status %d", status);
	status = -EIO;
	goto out;
B
Benny Halevy 已提交
3563 3564 3565
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
3566 3567 3568
}

static int decode_attr_fs_locations(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs4_fs_locations *res)
3569 3570
{
	int n;
A
Al Viro 已提交
3571
	__be32 *p;
3572 3573 3574 3575 3576 3577 3578
	int status = -EIO;

	if (unlikely(bitmap[0] & (FATTR4_WORD0_FS_LOCATIONS -1U)))
		goto out;
	status = 0;
	if (unlikely(!(bitmap[0] & FATTR4_WORD0_FS_LOCATIONS)))
		goto out;
3579 3580 3581 3582
	status = -EIO;
	/* Ignore borken servers that return unrequested attrs */
	if (unlikely(res == NULL))
		goto out;
3583
	dprintk("%s: fsroot:\n", __func__);
3584
	status = decode_pathname(xdr, &res->fs_path);
3585 3586
	if (unlikely(status != 0))
		goto out;
B
Benny Halevy 已提交
3587 3588 3589
	p = xdr_inline_decode(xdr, 4);
	if (unlikely(!p))
		goto out_overflow;
3590
	n = be32_to_cpup(p);
3591 3592
	if (n <= 0)
		goto out_eio;
3593
	for (res->nlocations = 0; res->nlocations < n; res->nlocations++) {
3594
		u32 m;
3595
		struct nfs4_fs_location *loc;
3596

3597 3598 3599
		if (res->nlocations == NFS4_FS_LOCATIONS_MAXENTRIES)
			break;
		loc = &res->locations[res->nlocations];
B
Benny Halevy 已提交
3600 3601 3602
		p = xdr_inline_decode(xdr, 4);
		if (unlikely(!p))
			goto out_overflow;
3603
		m = be32_to_cpup(p);
3604

3605
		dprintk("%s: servers:\n", __func__);
3606 3607 3608 3609
		for (loc->nservers = 0; loc->nservers < m; loc->nservers++) {
			struct nfs4_string *server;

			if (loc->nservers == NFS4_FS_LOCATION_MAXSERVERS) {
3610 3611 3612
				unsigned int i;
				dprintk("%s: using first %u of %u servers "
					"returned for location %u\n",
3613
						__func__,
3614 3615
						NFS4_FS_LOCATION_MAXSERVERS,
						m, res->nlocations);
3616
				for (i = loc->nservers; i < m; i++) {
T
Trond Myklebust 已提交
3617
					unsigned int len;
3618 3619 3620 3621 3622
					char *data;
					status = decode_opaque_inline(xdr, &len, &data);
					if (unlikely(status != 0))
						goto out_eio;
				}
3623
				break;
3624
			}
3625 3626 3627 3628 3629
			server = &loc->servers[loc->nservers];
			status = decode_opaque_inline(xdr, &server->len, &server->data);
			if (unlikely(status != 0))
				goto out_eio;
			dprintk("%s ", server->data);
3630 3631
		}
		status = decode_pathname(xdr, &loc->rootpath);
3632 3633 3634
		if (unlikely(status != 0))
			goto out_eio;
	}
3635
	if (res->nlocations != 0)
3636
		status = NFS_ATTR_FATTR_V4_LOCATIONS;
3637
out:
3638
	dprintk("%s: fs_locations done, error = %d\n", __func__, status);
3639
	return status;
B
Benny Halevy 已提交
3640 3641
out_overflow:
	print_overflow_msg(__func__, xdr);
3642 3643 3644 3645 3646
out_eio:
	status = -EIO;
	goto out;
}

L
Linus Torvalds 已提交
3647 3648
static int decode_attr_maxfilesize(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
{
A
Al Viro 已提交
3649
	__be32 *p;
L
Linus Torvalds 已提交
3650 3651 3652 3653 3654 3655
	int status = 0;

	*res = 0;
	if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXFILESIZE - 1U)))
		return -EIO;
	if (likely(bitmap[0] & FATTR4_WORD0_MAXFILESIZE)) {
B
Benny Halevy 已提交
3656 3657 3658
		p = xdr_inline_decode(xdr, 8);
		if (unlikely(!p))
			goto out_overflow;
3659
		xdr_decode_hyper(p, res);
L
Linus Torvalds 已提交
3660 3661
		bitmap[0] &= ~FATTR4_WORD0_MAXFILESIZE;
	}
3662
	dprintk("%s: maxfilesize=%Lu\n", __func__, (unsigned long long)*res);
L
Linus Torvalds 已提交
3663
	return status;
B
Benny Halevy 已提交
3664 3665 3666
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
L
Linus Torvalds 已提交
3667 3668 3669 3670
}

static int decode_attr_maxlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxlink)
{
A
Al Viro 已提交
3671
	__be32 *p;
L
Linus Torvalds 已提交
3672 3673 3674 3675 3676 3677
	int status = 0;

	*maxlink = 1;
	if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXLINK - 1U)))
		return -EIO;
	if (likely(bitmap[0] & FATTR4_WORD0_MAXLINK)) {
B
Benny Halevy 已提交
3678 3679 3680
		p = xdr_inline_decode(xdr, 4);
		if (unlikely(!p))
			goto out_overflow;
3681
		*maxlink = be32_to_cpup(p);
L
Linus Torvalds 已提交
3682 3683
		bitmap[0] &= ~FATTR4_WORD0_MAXLINK;
	}
3684
	dprintk("%s: maxlink=%u\n", __func__, *maxlink);
L
Linus Torvalds 已提交
3685
	return status;
B
Benny Halevy 已提交
3686 3687 3688
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
L
Linus Torvalds 已提交
3689 3690 3691 3692
}

static int decode_attr_maxname(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxname)
{
A
Al Viro 已提交
3693
	__be32 *p;
L
Linus Torvalds 已提交
3694 3695 3696 3697 3698 3699
	int status = 0;

	*maxname = 1024;
	if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXNAME - 1U)))
		return -EIO;
	if (likely(bitmap[0] & FATTR4_WORD0_MAXNAME)) {
B
Benny Halevy 已提交
3700 3701 3702
		p = xdr_inline_decode(xdr, 4);
		if (unlikely(!p))
			goto out_overflow;
3703
		*maxname = be32_to_cpup(p);
L
Linus Torvalds 已提交
3704 3705
		bitmap[0] &= ~FATTR4_WORD0_MAXNAME;
	}
3706
	dprintk("%s: maxname=%u\n", __func__, *maxname);
L
Linus Torvalds 已提交
3707
	return status;
B
Benny Halevy 已提交
3708 3709 3710
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
L
Linus Torvalds 已提交
3711 3712 3713 3714
}

static int decode_attr_maxread(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
{
A
Al Viro 已提交
3715
	__be32 *p;
L
Linus Torvalds 已提交
3716 3717 3718 3719 3720 3721 3722
	int status = 0;

	*res = 1024;
	if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXREAD - 1U)))
		return -EIO;
	if (likely(bitmap[0] & FATTR4_WORD0_MAXREAD)) {
		uint64_t maxread;
B
Benny Halevy 已提交
3723 3724 3725
		p = xdr_inline_decode(xdr, 8);
		if (unlikely(!p))
			goto out_overflow;
3726
		xdr_decode_hyper(p, &maxread);
L
Linus Torvalds 已提交
3727 3728 3729 3730 3731
		if (maxread > 0x7FFFFFFF)
			maxread = 0x7FFFFFFF;
		*res = (uint32_t)maxread;
		bitmap[0] &= ~FATTR4_WORD0_MAXREAD;
	}
3732
	dprintk("%s: maxread=%lu\n", __func__, (unsigned long)*res);
L
Linus Torvalds 已提交
3733
	return status;
B
Benny Halevy 已提交
3734 3735 3736
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
L
Linus Torvalds 已提交
3737 3738 3739 3740
}

static int decode_attr_maxwrite(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
{
A
Al Viro 已提交
3741
	__be32 *p;
L
Linus Torvalds 已提交
3742 3743 3744 3745 3746 3747 3748
	int status = 0;

	*res = 1024;
	if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXWRITE - 1U)))
		return -EIO;
	if (likely(bitmap[0] & FATTR4_WORD0_MAXWRITE)) {
		uint64_t maxwrite;
B
Benny Halevy 已提交
3749 3750 3751
		p = xdr_inline_decode(xdr, 8);
		if (unlikely(!p))
			goto out_overflow;
3752
		xdr_decode_hyper(p, &maxwrite);
L
Linus Torvalds 已提交
3753 3754 3755 3756 3757
		if (maxwrite > 0x7FFFFFFF)
			maxwrite = 0x7FFFFFFF;
		*res = (uint32_t)maxwrite;
		bitmap[0] &= ~FATTR4_WORD0_MAXWRITE;
	}
3758
	dprintk("%s: maxwrite=%lu\n", __func__, (unsigned long)*res);
L
Linus Torvalds 已提交
3759
	return status;
B
Benny Halevy 已提交
3760 3761 3762
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
L
Linus Torvalds 已提交
3763 3764
}

3765
static int decode_attr_mode(struct xdr_stream *xdr, uint32_t *bitmap, umode_t *mode)
L
Linus Torvalds 已提交
3766
{
3767
	uint32_t tmp;
A
Al Viro 已提交
3768
	__be32 *p;
3769
	int ret = 0;
L
Linus Torvalds 已提交
3770 3771 3772 3773 3774

	*mode = 0;
	if (unlikely(bitmap[1] & (FATTR4_WORD1_MODE - 1U)))
		return -EIO;
	if (likely(bitmap[1] & FATTR4_WORD1_MODE)) {
B
Benny Halevy 已提交
3775 3776 3777
		p = xdr_inline_decode(xdr, 4);
		if (unlikely(!p))
			goto out_overflow;
3778
		tmp = be32_to_cpup(p);
3779
		*mode = tmp & ~S_IFMT;
L
Linus Torvalds 已提交
3780
		bitmap[1] &= ~FATTR4_WORD1_MODE;
3781
		ret = NFS_ATTR_FATTR_MODE;
L
Linus Torvalds 已提交
3782
	}
3783
	dprintk("%s: file mode=0%o\n", __func__, (unsigned int)*mode);
3784
	return ret;
B
Benny Halevy 已提交
3785 3786 3787
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
L
Linus Torvalds 已提交
3788 3789 3790 3791
}

static int decode_attr_nlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *nlink)
{
A
Al Viro 已提交
3792
	__be32 *p;
3793
	int ret = 0;
L
Linus Torvalds 已提交
3794 3795 3796 3797 3798

	*nlink = 1;
	if (unlikely(bitmap[1] & (FATTR4_WORD1_NUMLINKS - 1U)))
		return -EIO;
	if (likely(bitmap[1] & FATTR4_WORD1_NUMLINKS)) {
B
Benny Halevy 已提交
3799 3800 3801
		p = xdr_inline_decode(xdr, 4);
		if (unlikely(!p))
			goto out_overflow;
3802
		*nlink = be32_to_cpup(p);
L
Linus Torvalds 已提交
3803
		bitmap[1] &= ~FATTR4_WORD1_NUMLINKS;
3804
		ret = NFS_ATTR_FATTR_NLINK;
L
Linus Torvalds 已提交
3805
	}
3806
	dprintk("%s: nlink=%u\n", __func__, (unsigned int)*nlink);
3807
	return ret;
B
Benny Halevy 已提交
3808 3809 3810
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
L
Linus Torvalds 已提交
3811 3812
}

3813
static int decode_attr_owner(struct xdr_stream *xdr, uint32_t *bitmap,
3814
		const struct nfs_server *server, kuid_t *uid,
3815
		struct nfs4_string *owner_name)
L
Linus Torvalds 已提交
3816
{
A
Al Viro 已提交
3817 3818
	uint32_t len;
	__be32 *p;
3819
	int ret = 0;
L
Linus Torvalds 已提交
3820

3821
	*uid = make_kuid(&init_user_ns, -2);
L
Linus Torvalds 已提交
3822 3823 3824
	if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER - 1U)))
		return -EIO;
	if (likely(bitmap[1] & FATTR4_WORD1_OWNER)) {
B
Benny Halevy 已提交
3825 3826 3827
		p = xdr_inline_decode(xdr, 4);
		if (unlikely(!p))
			goto out_overflow;
3828
		len = be32_to_cpup(p);
B
Benny Halevy 已提交
3829 3830 3831
		p = xdr_inline_decode(xdr, len);
		if (unlikely(!p))
			goto out_overflow;
3832 3833 3834 3835 3836 3837
		if (owner_name != NULL) {
			owner_name->data = kmemdup(p, len, GFP_NOWAIT);
			if (owner_name->data != NULL) {
				owner_name->len = len;
				ret = NFS_ATTR_FATTR_OWNER_NAME;
			}
3838
		} else if (len < XDR_MAX_NETOBJ) {
3839
			if (nfs_map_name_to_uid(server, (char *)p, len, uid) == 0)
3840 3841
				ret = NFS_ATTR_FATTR_OWNER;
			else
L
Linus Torvalds 已提交
3842
				dprintk("%s: nfs_map_name_to_uid failed!\n",
3843
						__func__);
L
Linus Torvalds 已提交
3844
		} else
3845
			dprintk("%s: name too long (%u)!\n",
3846
					__func__, len);
L
Linus Torvalds 已提交
3847 3848
		bitmap[1] &= ~FATTR4_WORD1_OWNER;
	}
3849
	dprintk("%s: uid=%d\n", __func__, (int)from_kuid(&init_user_ns, *uid));
3850
	return ret;
B
Benny Halevy 已提交
3851 3852 3853
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
L
Linus Torvalds 已提交
3854 3855
}

3856
static int decode_attr_group(struct xdr_stream *xdr, uint32_t *bitmap,
3857
		const struct nfs_server *server, kgid_t *gid,
3858
		struct nfs4_string *group_name)
L
Linus Torvalds 已提交
3859
{
A
Al Viro 已提交
3860 3861
	uint32_t len;
	__be32 *p;
3862
	int ret = 0;
L
Linus Torvalds 已提交
3863

3864
	*gid = make_kgid(&init_user_ns, -2);
L
Linus Torvalds 已提交
3865 3866 3867
	if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER_GROUP - 1U)))
		return -EIO;
	if (likely(bitmap[1] & FATTR4_WORD1_OWNER_GROUP)) {
B
Benny Halevy 已提交
3868 3869 3870
		p = xdr_inline_decode(xdr, 4);
		if (unlikely(!p))
			goto out_overflow;
3871
		len = be32_to_cpup(p);
B
Benny Halevy 已提交
3872 3873 3874
		p = xdr_inline_decode(xdr, len);
		if (unlikely(!p))
			goto out_overflow;
3875 3876 3877 3878 3879 3880
		if (group_name != NULL) {
			group_name->data = kmemdup(p, len, GFP_NOWAIT);
			if (group_name->data != NULL) {
				group_name->len = len;
				ret = NFS_ATTR_FATTR_GROUP_NAME;
			}
3881
		} else if (len < XDR_MAX_NETOBJ) {
3882
			if (nfs_map_group_to_gid(server, (char *)p, len, gid) == 0)
3883 3884
				ret = NFS_ATTR_FATTR_GROUP;
			else
L
Linus Torvalds 已提交
3885
				dprintk("%s: nfs_map_group_to_gid failed!\n",
3886
						__func__);
L
Linus Torvalds 已提交
3887
		} else
3888
			dprintk("%s: name too long (%u)!\n",
3889
					__func__, len);
L
Linus Torvalds 已提交
3890 3891
		bitmap[1] &= ~FATTR4_WORD1_OWNER_GROUP;
	}
3892
	dprintk("%s: gid=%d\n", __func__, (int)from_kgid(&init_user_ns, *gid));
3893
	return ret;
B
Benny Halevy 已提交
3894 3895 3896
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
L
Linus Torvalds 已提交
3897 3898 3899 3900
}

static int decode_attr_rdev(struct xdr_stream *xdr, uint32_t *bitmap, dev_t *rdev)
{
A
Al Viro 已提交
3901 3902
	uint32_t major = 0, minor = 0;
	__be32 *p;
3903
	int ret = 0;
L
Linus Torvalds 已提交
3904 3905 3906 3907 3908 3909 3910

	*rdev = MKDEV(0,0);
	if (unlikely(bitmap[1] & (FATTR4_WORD1_RAWDEV - 1U)))
		return -EIO;
	if (likely(bitmap[1] & FATTR4_WORD1_RAWDEV)) {
		dev_t tmp;

B
Benny Halevy 已提交
3911 3912 3913
		p = xdr_inline_decode(xdr, 8);
		if (unlikely(!p))
			goto out_overflow;
B
Benny Halevy 已提交
3914
		major = be32_to_cpup(p++);
3915
		minor = be32_to_cpup(p);
L
Linus Torvalds 已提交
3916 3917 3918 3919
		tmp = MKDEV(major, minor);
		if (MAJOR(tmp) == major && MINOR(tmp) == minor)
			*rdev = tmp;
		bitmap[1] &= ~ FATTR4_WORD1_RAWDEV;
3920
		ret = NFS_ATTR_FATTR_RDEV;
L
Linus Torvalds 已提交
3921
	}
3922
	dprintk("%s: rdev=(0x%x:0x%x)\n", __func__, major, minor);
3923
	return ret;
B
Benny Halevy 已提交
3924 3925 3926
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
L
Linus Torvalds 已提交
3927 3928 3929 3930
}

static int decode_attr_space_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
{
A
Al Viro 已提交
3931
	__be32 *p;
L
Linus Torvalds 已提交
3932 3933 3934 3935 3936 3937
	int status = 0;

	*res = 0;
	if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_AVAIL - 1U)))
		return -EIO;
	if (likely(bitmap[1] & FATTR4_WORD1_SPACE_AVAIL)) {
B
Benny Halevy 已提交
3938 3939 3940
		p = xdr_inline_decode(xdr, 8);
		if (unlikely(!p))
			goto out_overflow;
3941
		xdr_decode_hyper(p, res);
L
Linus Torvalds 已提交
3942 3943
		bitmap[1] &= ~FATTR4_WORD1_SPACE_AVAIL;
	}
3944
	dprintk("%s: space avail=%Lu\n", __func__, (unsigned long long)*res);
L
Linus Torvalds 已提交
3945
	return status;
B
Benny Halevy 已提交
3946 3947 3948
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
L
Linus Torvalds 已提交
3949 3950 3951 3952
}

static int decode_attr_space_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
{
A
Al Viro 已提交
3953
	__be32 *p;
L
Linus Torvalds 已提交
3954 3955 3956 3957 3958 3959
	int status = 0;

	*res = 0;
	if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_FREE - 1U)))
		return -EIO;
	if (likely(bitmap[1] & FATTR4_WORD1_SPACE_FREE)) {
B
Benny Halevy 已提交
3960 3961 3962
		p = xdr_inline_decode(xdr, 8);
		if (unlikely(!p))
			goto out_overflow;
3963
		xdr_decode_hyper(p, res);
L
Linus Torvalds 已提交
3964 3965
		bitmap[1] &= ~FATTR4_WORD1_SPACE_FREE;
	}
3966
	dprintk("%s: space free=%Lu\n", __func__, (unsigned long long)*res);
L
Linus Torvalds 已提交
3967
	return status;
B
Benny Halevy 已提交
3968 3969 3970
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
L
Linus Torvalds 已提交
3971 3972 3973 3974
}

static int decode_attr_space_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
{
A
Al Viro 已提交
3975
	__be32 *p;
L
Linus Torvalds 已提交
3976 3977 3978 3979 3980 3981
	int status = 0;

	*res = 0;
	if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_TOTAL - 1U)))
		return -EIO;
	if (likely(bitmap[1] & FATTR4_WORD1_SPACE_TOTAL)) {
B
Benny Halevy 已提交
3982 3983 3984
		p = xdr_inline_decode(xdr, 8);
		if (unlikely(!p))
			goto out_overflow;
3985
		xdr_decode_hyper(p, res);
L
Linus Torvalds 已提交
3986 3987
		bitmap[1] &= ~FATTR4_WORD1_SPACE_TOTAL;
	}
3988
	dprintk("%s: space total=%Lu\n", __func__, (unsigned long long)*res);
L
Linus Torvalds 已提交
3989
	return status;
B
Benny Halevy 已提交
3990 3991 3992
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
L
Linus Torvalds 已提交
3993 3994 3995 3996
}

static int decode_attr_space_used(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *used)
{
A
Al Viro 已提交
3997
	__be32 *p;
3998
	int ret = 0;
L
Linus Torvalds 已提交
3999 4000 4001 4002 4003

	*used = 0;
	if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_USED - 1U)))
		return -EIO;
	if (likely(bitmap[1] & FATTR4_WORD1_SPACE_USED)) {
B
Benny Halevy 已提交
4004 4005 4006
		p = xdr_inline_decode(xdr, 8);
		if (unlikely(!p))
			goto out_overflow;
4007
		xdr_decode_hyper(p, used);
L
Linus Torvalds 已提交
4008
		bitmap[1] &= ~FATTR4_WORD1_SPACE_USED;
4009
		ret = NFS_ATTR_FATTR_SPACE_USED;
L
Linus Torvalds 已提交
4010
	}
4011
	dprintk("%s: space used=%Lu\n", __func__,
L
Linus Torvalds 已提交
4012
			(unsigned long long)*used);
4013
	return ret;
B
Benny Halevy 已提交
4014 4015 4016
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
L
Linus Torvalds 已提交
4017 4018 4019 4020
}

static int decode_attr_time(struct xdr_stream *xdr, struct timespec *time)
{
A
Al Viro 已提交
4021
	__be32 *p;
L
Linus Torvalds 已提交
4022 4023 4024
	uint64_t sec;
	uint32_t nsec;

B
Benny Halevy 已提交
4025 4026 4027
	p = xdr_inline_decode(xdr, 12);
	if (unlikely(!p))
		goto out_overflow;
B
Benny Halevy 已提交
4028
	p = xdr_decode_hyper(p, &sec);
4029
	nsec = be32_to_cpup(p);
L
Linus Torvalds 已提交
4030 4031 4032
	time->tv_sec = (time_t)sec;
	time->tv_nsec = (long)nsec;
	return 0;
B
Benny Halevy 已提交
4033 4034 4035
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
L
Linus Torvalds 已提交
4036 4037 4038 4039 4040 4041 4042 4043 4044 4045 4046 4047
}

static int decode_attr_time_access(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
{
	int status = 0;

	time->tv_sec = 0;
	time->tv_nsec = 0;
	if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_ACCESS - 1U)))
		return -EIO;
	if (likely(bitmap[1] & FATTR4_WORD1_TIME_ACCESS)) {
		status = decode_attr_time(xdr, time);
4048 4049
		if (status == 0)
			status = NFS_ATTR_FATTR_ATIME;
L
Linus Torvalds 已提交
4050 4051
		bitmap[1] &= ~FATTR4_WORD1_TIME_ACCESS;
	}
4052
	dprintk("%s: atime=%ld\n", __func__, (long)time->tv_sec);
L
Linus Torvalds 已提交
4053 4054 4055 4056 4057 4058 4059 4060 4061 4062 4063 4064 4065
	return status;
}

static int decode_attr_time_metadata(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
{
	int status = 0;

	time->tv_sec = 0;
	time->tv_nsec = 0;
	if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_METADATA - 1U)))
		return -EIO;
	if (likely(bitmap[1] & FATTR4_WORD1_TIME_METADATA)) {
		status = decode_attr_time(xdr, time);
4066 4067
		if (status == 0)
			status = NFS_ATTR_FATTR_CTIME;
L
Linus Torvalds 已提交
4068 4069
		bitmap[1] &= ~FATTR4_WORD1_TIME_METADATA;
	}
4070
	dprintk("%s: ctime=%ld\n", __func__, (long)time->tv_sec);
L
Linus Torvalds 已提交
4071 4072 4073
	return status;
}

4074 4075 4076 4077 4078 4079 4080 4081 4082 4083 4084 4085 4086 4087 4088 4089 4090 4091
static int decode_attr_time_delta(struct xdr_stream *xdr, uint32_t *bitmap,
				  struct timespec *time)
{
	int status = 0;

	time->tv_sec = 0;
	time->tv_nsec = 0;
	if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_DELTA - 1U)))
		return -EIO;
	if (likely(bitmap[1] & FATTR4_WORD1_TIME_DELTA)) {
		status = decode_attr_time(xdr, time);
		bitmap[1] &= ~FATTR4_WORD1_TIME_DELTA;
	}
	dprintk("%s: time_delta=%ld %ld\n", __func__, (long)time->tv_sec,
		(long)time->tv_nsec);
	return status;
}

4092 4093 4094 4095 4096 4097 4098 4099 4100 4101 4102 4103 4104 4105 4106 4107 4108 4109 4110 4111 4112 4113 4114 4115 4116 4117 4118 4119 4120 4121 4122 4123 4124 4125 4126 4127 4128 4129 4130 4131 4132 4133 4134 4135 4136 4137 4138 4139 4140 4141
static int decode_attr_security_label(struct xdr_stream *xdr, uint32_t *bitmap,
					struct nfs4_label *label)
{
	uint32_t pi = 0;
	uint32_t lfs = 0;
	__u32 len;
	__be32 *p;
	int status = 0;

	if (unlikely(bitmap[2] & (FATTR4_WORD2_SECURITY_LABEL - 1U)))
		return -EIO;
	if (likely(bitmap[2] & FATTR4_WORD2_SECURITY_LABEL)) {
		p = xdr_inline_decode(xdr, 4);
		if (unlikely(!p))
			goto out_overflow;
		lfs = be32_to_cpup(p++);
		p = xdr_inline_decode(xdr, 4);
		if (unlikely(!p))
			goto out_overflow;
		pi = be32_to_cpup(p++);
		p = xdr_inline_decode(xdr, 4);
		if (unlikely(!p))
			goto out_overflow;
		len = be32_to_cpup(p++);
		p = xdr_inline_decode(xdr, len);
		if (unlikely(!p))
			goto out_overflow;
		if (len < NFS4_MAXLABELLEN) {
			if (label) {
				memcpy(label->label, p, len);
				label->len = len;
				label->pi = pi;
				label->lfs = lfs;
				status = NFS_ATTR_FATTR_V4_SECURITY_LABEL;
			}
			bitmap[2] &= ~FATTR4_WORD2_SECURITY_LABEL;
		} else
			printk(KERN_WARNING "%s: label too long (%u)!\n",
					__func__, len);
	}
	if (label && label->label)
		dprintk("%s: label=%s, len=%d, PI=%d, LFS=%d\n", __func__,
			(char *)label->label, label->len, label->pi, label->lfs);
	return status;

out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
}

L
Linus Torvalds 已提交
4142 4143 4144 4145 4146 4147 4148 4149 4150 4151
static int decode_attr_time_modify(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
{
	int status = 0;

	time->tv_sec = 0;
	time->tv_nsec = 0;
	if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_MODIFY - 1U)))
		return -EIO;
	if (likely(bitmap[1] & FATTR4_WORD1_TIME_MODIFY)) {
		status = decode_attr_time(xdr, time);
4152 4153
		if (status == 0)
			status = NFS_ATTR_FATTR_MTIME;
L
Linus Torvalds 已提交
4154 4155
		bitmap[1] &= ~FATTR4_WORD1_TIME_MODIFY;
	}
4156
	dprintk("%s: mtime=%ld\n", __func__, (long)time->tv_sec);
L
Linus Torvalds 已提交
4157 4158 4159
	return status;
}

4160
static int verify_attr_len(struct xdr_stream *xdr, unsigned int savep, uint32_t attrlen)
L
Linus Torvalds 已提交
4161 4162
{
	unsigned int attrwords = XDR_QUADLEN(attrlen);
4163
	unsigned int nwords = (xdr_stream_pos(xdr) - savep) >> 2;
L
Linus Torvalds 已提交
4164 4165

	if (unlikely(attrwords != nwords)) {
4166 4167
		dprintk("%s: server returned incorrect attribute length: "
			"%u %c %u\n",
4168
				__func__,
L
Linus Torvalds 已提交
4169 4170 4171 4172 4173 4174 4175 4176 4177 4178
				attrwords << 2,
				(attrwords < nwords) ? '<' : '>',
				nwords << 2);
		return -EIO;
	}
	return 0;
}

static int decode_change_info(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
{
A
Al Viro 已提交
4179
	__be32 *p;
L
Linus Torvalds 已提交
4180

B
Benny Halevy 已提交
4181 4182 4183
	p = xdr_inline_decode(xdr, 20);
	if (unlikely(!p))
		goto out_overflow;
B
Benny Halevy 已提交
4184
	cinfo->atomic = be32_to_cpup(p++);
B
Benny Halevy 已提交
4185
	p = xdr_decode_hyper(p, &cinfo->before);
4186
	xdr_decode_hyper(p, &cinfo->after);
L
Linus Torvalds 已提交
4187
	return 0;
B
Benny Halevy 已提交
4188 4189 4190
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
L
Linus Torvalds 已提交
4191 4192
}

4193
static int decode_access(struct xdr_stream *xdr, u32 *supported, u32 *access)
L
Linus Torvalds 已提交
4194
{
A
Al Viro 已提交
4195
	__be32 *p;
L
Linus Torvalds 已提交
4196 4197 4198 4199 4200 4201
	uint32_t supp, acc;
	int status;

	status = decode_op_hdr(xdr, OP_ACCESS);
	if (status)
		return status;
B
Benny Halevy 已提交
4202 4203 4204
	p = xdr_inline_decode(xdr, 8);
	if (unlikely(!p))
		goto out_overflow;
B
Benny Halevy 已提交
4205
	supp = be32_to_cpup(p++);
4206
	acc = be32_to_cpup(p);
4207 4208
	*supported = supp;
	*access = acc;
L
Linus Torvalds 已提交
4209
	return 0;
B
Benny Halevy 已提交
4210 4211 4212
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
L
Linus Torvalds 已提交
4213 4214
}

4215
static int decode_opaque_fixed(struct xdr_stream *xdr, void *buf, size_t len)
L
Linus Torvalds 已提交
4216
{
A
Al Viro 已提交
4217
	__be32 *p;
4218 4219 4220 4221 4222 4223 4224 4225 4226 4227 4228 4229

	p = xdr_inline_decode(xdr, len);
	if (likely(p)) {
		memcpy(buf, p, len);
		return 0;
	}
	print_overflow_msg(__func__, xdr);
	return -EIO;
}

static int decode_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
{
4230
	return decode_opaque_fixed(xdr, stateid, NFS4_STATEID_SIZE);
4231 4232 4233 4234
}

static int decode_close(struct xdr_stream *xdr, struct nfs_closeres *res)
{
L
Linus Torvalds 已提交
4235 4236 4237
	int status;

	status = decode_op_hdr(xdr, OP_CLOSE);
4238 4239
	if (status != -EIO)
		nfs_increment_open_seqid(status, res->seqid);
4240 4241 4242
	if (!status)
		status = decode_stateid(xdr, &res->stateid);
	return status;
L
Linus Torvalds 已提交
4243 4244
}

4245 4246
static int decode_verifier(struct xdr_stream *xdr, void *verifier)
{
4247
	return decode_opaque_fixed(xdr, verifier, NFS4_VERIFIER_SIZE);
L
Linus Torvalds 已提交
4248 4249
}

4250 4251 4252 4253 4254
static int decode_write_verifier(struct xdr_stream *xdr, struct nfs_write_verifier *verifier)
{
	return decode_opaque_fixed(xdr, verifier->data, NFS4_VERIFIER_SIZE);
}

4255
static int decode_commit(struct xdr_stream *xdr, struct nfs_commitres *res)
L
Linus Torvalds 已提交
4256 4257 4258 4259
{
	int status;

	status = decode_op_hdr(xdr, OP_COMMIT);
4260
	if (!status)
4261
		status = decode_write_verifier(xdr, &res->verf->verifier);
4262
	return status;
L
Linus Torvalds 已提交
4263 4264 4265 4266
}

static int decode_create(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
{
A
Al Viro 已提交
4267
	__be32 *p;
L
Linus Torvalds 已提交
4268 4269 4270 4271 4272 4273 4274 4275
	uint32_t bmlen;
	int status;

	status = decode_op_hdr(xdr, OP_CREATE);
	if (status)
		return status;
	if ((status = decode_change_info(xdr, cinfo)))
		return status;
B
Benny Halevy 已提交
4276 4277 4278
	p = xdr_inline_decode(xdr, 4);
	if (unlikely(!p))
		goto out_overflow;
4279
	bmlen = be32_to_cpup(p);
B
Benny Halevy 已提交
4280 4281 4282 4283 4284 4285
	p = xdr_inline_decode(xdr, bmlen << 2);
	if (likely(p))
		return 0;
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
L
Linus Torvalds 已提交
4286 4287 4288 4289
}

static int decode_server_caps(struct xdr_stream *xdr, struct nfs4_server_caps_res *res)
{
4290
	unsigned int savep;
4291
	uint32_t attrlen, bitmap[3] = {0};
L
Linus Torvalds 已提交
4292 4293 4294 4295 4296 4297 4298 4299 4300 4301
	int status;

	if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
		goto xdr_error;
	if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
		goto xdr_error;
	if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
		goto xdr_error;
	if ((status = decode_attr_supported(xdr, bitmap, res->attr_bitmask)) != 0)
		goto xdr_error;
4302 4303 4304
	if ((status = decode_attr_fh_expire_type(xdr, bitmap,
						 &res->fh_expire_type)) != 0)
		goto xdr_error;
L
Linus Torvalds 已提交
4305 4306 4307 4308 4309 4310 4311 4312
	if ((status = decode_attr_link_support(xdr, bitmap, &res->has_links)) != 0)
		goto xdr_error;
	if ((status = decode_attr_symlink_support(xdr, bitmap, &res->has_symlinks)) != 0)
		goto xdr_error;
	if ((status = decode_attr_aclsupport(xdr, bitmap, &res->acl_bitmask)) != 0)
		goto xdr_error;
	status = verify_attr_len(xdr, savep, attrlen);
xdr_error:
4313
	dprintk("%s: xdr returned %d!\n", __func__, -status);
L
Linus Torvalds 已提交
4314 4315
	return status;
}
4316

L
Linus Torvalds 已提交
4317 4318
static int decode_statfs(struct xdr_stream *xdr, struct nfs_fsstat *fsstat)
{
4319
	unsigned int savep;
4320
	uint32_t attrlen, bitmap[3] = {0};
L
Linus Torvalds 已提交
4321
	int status;
4322

L
Linus Torvalds 已提交
4323 4324 4325 4326 4327 4328 4329 4330 4331 4332 4333 4334 4335 4336 4337 4338 4339 4340 4341 4342 4343 4344
	if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
		goto xdr_error;
	if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
		goto xdr_error;
	if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
		goto xdr_error;

	if ((status = decode_attr_files_avail(xdr, bitmap, &fsstat->afiles)) != 0)
		goto xdr_error;
	if ((status = decode_attr_files_free(xdr, bitmap, &fsstat->ffiles)) != 0)
		goto xdr_error;
	if ((status = decode_attr_files_total(xdr, bitmap, &fsstat->tfiles)) != 0)
		goto xdr_error;
	if ((status = decode_attr_space_avail(xdr, bitmap, &fsstat->abytes)) != 0)
		goto xdr_error;
	if ((status = decode_attr_space_free(xdr, bitmap, &fsstat->fbytes)) != 0)
		goto xdr_error;
	if ((status = decode_attr_space_total(xdr, bitmap, &fsstat->tbytes)) != 0)
		goto xdr_error;

	status = verify_attr_len(xdr, savep, attrlen);
xdr_error:
4345
	dprintk("%s: xdr returned %d!\n", __func__, -status);
L
Linus Torvalds 已提交
4346 4347 4348 4349 4350
	return status;
}

static int decode_pathconf(struct xdr_stream *xdr, struct nfs_pathconf *pathconf)
{
4351
	unsigned int savep;
4352
	uint32_t attrlen, bitmap[3] = {0};
L
Linus Torvalds 已提交
4353
	int status;
4354

L
Linus Torvalds 已提交
4355 4356 4357 4358 4359 4360 4361 4362 4363 4364 4365 4366 4367 4368
	if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
		goto xdr_error;
	if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
		goto xdr_error;
	if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
		goto xdr_error;

	if ((status = decode_attr_maxlink(xdr, bitmap, &pathconf->max_link)) != 0)
		goto xdr_error;
	if ((status = decode_attr_maxname(xdr, bitmap, &pathconf->max_namelen)) != 0)
		goto xdr_error;

	status = verify_attr_len(xdr, savep, attrlen);
xdr_error:
4369
	dprintk("%s: xdr returned %d!\n", __func__, -status);
L
Linus Torvalds 已提交
4370 4371 4372
	return status;
}

4373 4374 4375 4376 4377 4378 4379 4380 4381 4382 4383 4384 4385 4386 4387 4388 4389 4390 4391 4392 4393 4394 4395
static int decode_threshold_hint(struct xdr_stream *xdr,
				  uint32_t *bitmap,
				  uint64_t *res,
				  uint32_t hint_bit)
{
	__be32 *p;

	*res = 0;
	if (likely(bitmap[0] & hint_bit)) {
		p = xdr_inline_decode(xdr, 8);
		if (unlikely(!p))
			goto out_overflow;
		xdr_decode_hyper(p, res);
	}
	return 0;
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
}

static int decode_first_threshold_item4(struct xdr_stream *xdr,
					struct nfs4_threshold *res)
{
4396 4397
	__be32 *p;
	unsigned int savep;
4398 4399 4400 4401 4402 4403 4404 4405 4406 4407 4408 4409 4410 4411 4412 4413 4414 4415 4416 4417 4418 4419 4420 4421 4422 4423 4424 4425 4426 4427 4428 4429 4430 4431 4432 4433 4434 4435 4436 4437 4438 4439 4440 4441 4442 4443 4444 4445 4446 4447 4448 4449 4450 4451 4452 4453 4454 4455 4456 4457
	uint32_t bitmap[3] = {0,}, attrlen;
	int status;

	/* layout type */
	p = xdr_inline_decode(xdr, 4);
	if (unlikely(!p)) {
		print_overflow_msg(__func__, xdr);
		return -EIO;
	}
	res->l_type = be32_to_cpup(p);

	/* thi_hintset bitmap */
	status = decode_attr_bitmap(xdr, bitmap);
	if (status < 0)
		goto xdr_error;

	/* thi_hintlist length */
	status = decode_attr_length(xdr, &attrlen, &savep);
	if (status < 0)
		goto xdr_error;
	/* thi_hintlist */
	status = decode_threshold_hint(xdr, bitmap, &res->rd_sz, THRESHOLD_RD);
	if (status < 0)
		goto xdr_error;
	status = decode_threshold_hint(xdr, bitmap, &res->wr_sz, THRESHOLD_WR);
	if (status < 0)
		goto xdr_error;
	status = decode_threshold_hint(xdr, bitmap, &res->rd_io_sz,
				       THRESHOLD_RD_IO);
	if (status < 0)
		goto xdr_error;
	status = decode_threshold_hint(xdr, bitmap, &res->wr_io_sz,
				       THRESHOLD_WR_IO);
	if (status < 0)
		goto xdr_error;

	status = verify_attr_len(xdr, savep, attrlen);
	res->bm = bitmap[0];

	dprintk("%s bm=0x%x rd_sz=%llu wr_sz=%llu rd_io=%llu wr_io=%llu\n",
		 __func__, res->bm, res->rd_sz, res->wr_sz, res->rd_io_sz,
		res->wr_io_sz);
xdr_error:
	dprintk("%s ret=%d!\n", __func__, status);
	return status;
}

/*
 * Thresholds on pNFS direct I/O vrs MDS I/O
 */
static int decode_attr_mdsthreshold(struct xdr_stream *xdr,
				    uint32_t *bitmap,
				    struct nfs4_threshold *res)
{
	__be32 *p;
	int status = 0;
	uint32_t num;

	if (unlikely(bitmap[2] & (FATTR4_WORD2_MDSTHRESHOLD - 1U)))
		return -EIO;
4458
	if (bitmap[2] & FATTR4_WORD2_MDSTHRESHOLD) {
4459 4460 4461
		/* Did the server return an unrequested attribute? */
		if (unlikely(res == NULL))
			return -EREMOTEIO;
4462 4463 4464 4465 4466 4467 4468 4469 4470 4471 4472 4473
		p = xdr_inline_decode(xdr, 4);
		if (unlikely(!p))
			goto out_overflow;
		num = be32_to_cpup(p);
		if (num == 0)
			return 0;
		if (num > 1)
			printk(KERN_INFO "%s: Warning: Multiple pNFS layout "
				"drivers per filesystem not supported\n",
				__func__);

		status = decode_first_threshold_item4(xdr, res);
4474
		bitmap[2] &= ~FATTR4_WORD2_MDSTHRESHOLD;
4475 4476 4477 4478 4479 4480 4481
	}
	return status;
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
}

4482 4483
static int decode_getfattr_attrs(struct xdr_stream *xdr, uint32_t *bitmap,
		struct nfs_fattr *fattr, struct nfs_fh *fh,
4484
		struct nfs4_fs_locations *fs_loc, struct nfs4_label *label,
4485
		const struct nfs_server *server)
L
Linus Torvalds 已提交
4486
{
4487 4488
	int status;
	umode_t fmode = 0;
4489
	uint32_t type;
4490
	int32_t err;
L
Linus Torvalds 已提交
4491

4492 4493
	status = decode_attr_type(xdr, bitmap, &type);
	if (status < 0)
L
Linus Torvalds 已提交
4494
		goto xdr_error;
4495 4496 4497 4498 4499
	fattr->mode = 0;
	if (status != 0) {
		fattr->mode |= nfs_type2fmt[type];
		fattr->valid |= status;
	}
L
Linus Torvalds 已提交
4500

4501 4502
	status = decode_attr_change(xdr, bitmap, &fattr->change_attr);
	if (status < 0)
L
Linus Torvalds 已提交
4503
		goto xdr_error;
4504
	fattr->valid |= status;
4505 4506 4507

	status = decode_attr_size(xdr, bitmap, &fattr->size);
	if (status < 0)
L
Linus Torvalds 已提交
4508
		goto xdr_error;
4509
	fattr->valid |= status;
4510 4511 4512

	status = decode_attr_fsid(xdr, bitmap, &fattr->fsid);
	if (status < 0)
L
Linus Torvalds 已提交
4513
		goto xdr_error;
4514
	fattr->valid |= status;
4515

4516 4517
	err = 0;
	status = decode_attr_error(xdr, bitmap, &err);
4518 4519 4520 4521 4522 4523 4524
	if (status < 0)
		goto xdr_error;

	status = decode_attr_filehandle(xdr, bitmap, fh);
	if (status < 0)
		goto xdr_error;

4525 4526
	status = decode_attr_fileid(xdr, bitmap, &fattr->fileid);
	if (status < 0)
L
Linus Torvalds 已提交
4527
		goto xdr_error;
4528
	fattr->valid |= status;
4529

4530
	status = decode_attr_fs_locations(xdr, bitmap, fs_loc);
4531
	if (status < 0)
4532
		goto xdr_error;
4533
	fattr->valid |= status;
4534 4535 4536

	status = decode_attr_mode(xdr, bitmap, &fmode);
	if (status < 0)
L
Linus Torvalds 已提交
4537
		goto xdr_error;
4538 4539 4540 4541
	if (status != 0) {
		fattr->mode |= fmode;
		fattr->valid |= status;
	}
4542 4543 4544

	status = decode_attr_nlink(xdr, bitmap, &fattr->nlink);
	if (status < 0)
L
Linus Torvalds 已提交
4545
		goto xdr_error;
4546
	fattr->valid |= status;
4547

4548
	status = decode_attr_owner(xdr, bitmap, server, &fattr->uid, fattr->owner_name);
4549
	if (status < 0)
L
Linus Torvalds 已提交
4550
		goto xdr_error;
4551
	fattr->valid |= status;
4552

4553
	status = decode_attr_group(xdr, bitmap, server, &fattr->gid, fattr->group_name);
4554
	if (status < 0)
L
Linus Torvalds 已提交
4555
		goto xdr_error;
4556
	fattr->valid |= status;
4557 4558 4559

	status = decode_attr_rdev(xdr, bitmap, &fattr->rdev);
	if (status < 0)
L
Linus Torvalds 已提交
4560
		goto xdr_error;
4561
	fattr->valid |= status;
4562 4563 4564

	status = decode_attr_space_used(xdr, bitmap, &fattr->du.nfs3.used);
	if (status < 0)
L
Linus Torvalds 已提交
4565
		goto xdr_error;
4566
	fattr->valid |= status;
4567 4568 4569

	status = decode_attr_time_access(xdr, bitmap, &fattr->atime);
	if (status < 0)
L
Linus Torvalds 已提交
4570
		goto xdr_error;
4571
	fattr->valid |= status;
4572 4573 4574

	status = decode_attr_time_metadata(xdr, bitmap, &fattr->ctime);
	if (status < 0)
L
Linus Torvalds 已提交
4575
		goto xdr_error;
4576
	fattr->valid |= status;
4577 4578 4579

	status = decode_attr_time_modify(xdr, bitmap, &fattr->mtime);
	if (status < 0)
L
Linus Torvalds 已提交
4580
		goto xdr_error;
4581
	fattr->valid |= status;
4582

4583
	status = decode_attr_mounted_on_fileid(xdr, bitmap, &fattr->mounted_on_fileid);
4584
	if (status < 0)
4585
		goto xdr_error;
4586
	fattr->valid |= status;
4587

4588 4589 4590 4591
	status = decode_attr_mdsthreshold(xdr, bitmap, fattr->mdsthreshold);
	if (status < 0)
		goto xdr_error;

4592 4593 4594 4595 4596 4597 4598
	if (label) {
		status = decode_attr_security_label(xdr, bitmap, label);
		if (status < 0)
			goto xdr_error;
		fattr->valid |= status;
	}

4599 4600 4601 4602 4603 4604
xdr_error:
	dprintk("%s: xdr returned %d\n", __func__, -status);
	return status;
}

static int decode_getfattr_generic(struct xdr_stream *xdr, struct nfs_fattr *fattr,
4605
		struct nfs_fh *fh, struct nfs4_fs_locations *fs_loc,
4606
		struct nfs4_label *label, const struct nfs_server *server)
4607
{
4608
	unsigned int savep;
4609
	uint32_t attrlen,
4610
		 bitmap[3] = {0};
4611 4612 4613 4614 4615 4616 4617 4618 4619 4620 4621 4622 4623 4624
	int status;

	status = decode_op_hdr(xdr, OP_GETATTR);
	if (status < 0)
		goto xdr_error;

	status = decode_attr_bitmap(xdr, bitmap);
	if (status < 0)
		goto xdr_error;

	status = decode_attr_length(xdr, &attrlen, &savep);
	if (status < 0)
		goto xdr_error;

4625 4626
	status = decode_getfattr_attrs(xdr, bitmap, fattr, fh, fs_loc,
					label, server);
4627 4628 4629
	if (status < 0)
		goto xdr_error;

4630
	status = verify_attr_len(xdr, savep, attrlen);
L
Linus Torvalds 已提交
4631
xdr_error:
4632
	dprintk("%s: xdr returned %d\n", __func__, -status);
L
Linus Torvalds 已提交
4633 4634 4635
	return status;
}

4636 4637 4638 4639 4640 4641
static int decode_getfattr_label(struct xdr_stream *xdr, struct nfs_fattr *fattr,
		struct nfs4_label *label, const struct nfs_server *server)
{
	return decode_getfattr_generic(xdr, fattr, NULL, NULL, label, server);
}

4642
static int decode_getfattr(struct xdr_stream *xdr, struct nfs_fattr *fattr,
4643
		const struct nfs_server *server)
4644
{
4645
	return decode_getfattr_generic(xdr, fattr, NULL, NULL, NULL, server);
4646
}
L
Linus Torvalds 已提交
4647

4648 4649 4650 4651 4652 4653 4654
/*
 * Decode potentially multiple layout types. Currently we only support
 * one layout driver per file system.
 */
static int decode_first_pnfs_layout_type(struct xdr_stream *xdr,
					 uint32_t *layouttype)
{
4655
	__be32 *p;
4656 4657 4658 4659 4660 4661 4662 4663 4664 4665 4666 4667 4668
	int num;

	p = xdr_inline_decode(xdr, 4);
	if (unlikely(!p))
		goto out_overflow;
	num = be32_to_cpup(p);

	/* pNFS is not supported by the underlying file system */
	if (num == 0) {
		*layouttype = 0;
		return 0;
	}
	if (num > 1)
4669 4670
		printk(KERN_INFO "NFS: %s: Warning: Multiple pNFS layout "
			"drivers per filesystem not supported\n", __func__);
4671 4672 4673 4674 4675 4676 4677 4678 4679 4680 4681 4682 4683 4684 4685 4686 4687 4688 4689 4690 4691 4692 4693 4694 4695 4696 4697 4698 4699 4700 4701 4702

	/* Decode and set first layout type, move xdr->p past unused types */
	p = xdr_inline_decode(xdr, num * 4);
	if (unlikely(!p))
		goto out_overflow;
	*layouttype = be32_to_cpup(p);
	return 0;
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
}

/*
 * The type of file system exported.
 * Note we must ensure that layouttype is set in any non-error case.
 */
static int decode_attr_pnfstype(struct xdr_stream *xdr, uint32_t *bitmap,
				uint32_t *layouttype)
{
	int status = 0;

	dprintk("%s: bitmap is %x\n", __func__, bitmap[1]);
	if (unlikely(bitmap[1] & (FATTR4_WORD1_FS_LAYOUT_TYPES - 1U)))
		return -EIO;
	if (bitmap[1] & FATTR4_WORD1_FS_LAYOUT_TYPES) {
		status = decode_first_pnfs_layout_type(xdr, layouttype);
		bitmap[1] &= ~FATTR4_WORD1_FS_LAYOUT_TYPES;
	} else
		*layouttype = 0;
	return status;
}

4703 4704 4705 4706 4707 4708 4709 4710 4711 4712 4713 4714 4715 4716 4717 4718 4719 4720 4721 4722 4723 4724
/*
 * The prefered block size for layout directed io
 */
static int decode_attr_layout_blksize(struct xdr_stream *xdr, uint32_t *bitmap,
				      uint32_t *res)
{
	__be32 *p;

	dprintk("%s: bitmap is %x\n", __func__, bitmap[2]);
	*res = 0;
	if (bitmap[2] & FATTR4_WORD2_LAYOUT_BLKSIZE) {
		p = xdr_inline_decode(xdr, 4);
		if (unlikely(!p)) {
			print_overflow_msg(__func__, xdr);
			return -EIO;
		}
		*res = be32_to_cpup(p);
		bitmap[2] &= ~FATTR4_WORD2_LAYOUT_BLKSIZE;
	}
	return 0;
}

L
Linus Torvalds 已提交
4725 4726
static int decode_fsinfo(struct xdr_stream *xdr, struct nfs_fsinfo *fsinfo)
{
4727
	unsigned int savep;
4728
	uint32_t attrlen, bitmap[3];
L
Linus Torvalds 已提交
4729 4730 4731 4732 4733 4734 4735 4736 4737 4738 4739 4740 4741 4742 4743 4744 4745 4746 4747 4748 4749
	int status;

	if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
		goto xdr_error;
	if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
		goto xdr_error;
	if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
		goto xdr_error;

	fsinfo->rtmult = fsinfo->wtmult = 512;	/* ??? */

	if ((status = decode_attr_lease_time(xdr, bitmap, &fsinfo->lease_time)) != 0)
		goto xdr_error;
	if ((status = decode_attr_maxfilesize(xdr, bitmap, &fsinfo->maxfilesize)) != 0)
		goto xdr_error;
	if ((status = decode_attr_maxread(xdr, bitmap, &fsinfo->rtmax)) != 0)
		goto xdr_error;
	fsinfo->rtpref = fsinfo->dtpref = fsinfo->rtmax;
	if ((status = decode_attr_maxwrite(xdr, bitmap, &fsinfo->wtmax)) != 0)
		goto xdr_error;
	fsinfo->wtpref = fsinfo->wtmax;
4750
	status = decode_attr_time_delta(xdr, bitmap, &fsinfo->time_delta);
4751 4752 4753
	if (status != 0)
		goto xdr_error;
	status = decode_attr_pnfstype(xdr, bitmap, &fsinfo->layouttype);
4754 4755
	if (status != 0)
		goto xdr_error;
4756 4757 4758
	status = decode_attr_layout_blksize(xdr, bitmap, &fsinfo->blksize);
	if (status)
		goto xdr_error;
L
Linus Torvalds 已提交
4759 4760 4761

	status = verify_attr_len(xdr, savep, attrlen);
xdr_error:
4762
	dprintk("%s: xdr returned %d!\n", __func__, -status);
L
Linus Torvalds 已提交
4763 4764 4765 4766 4767
	return status;
}

static int decode_getfh(struct xdr_stream *xdr, struct nfs_fh *fh)
{
A
Al Viro 已提交
4768
	__be32 *p;
L
Linus Torvalds 已提交
4769 4770 4771
	uint32_t len;
	int status;

4772 4773 4774
	/* Zero handle first to allow comparisons */
	memset(fh, 0, sizeof(*fh));

L
Linus Torvalds 已提交
4775 4776 4777 4778
	status = decode_op_hdr(xdr, OP_GETFH);
	if (status)
		return status;

B
Benny Halevy 已提交
4779 4780 4781
	p = xdr_inline_decode(xdr, 4);
	if (unlikely(!p))
		goto out_overflow;
4782
	len = be32_to_cpup(p);
L
Linus Torvalds 已提交
4783 4784 4785
	if (len > NFS4_FHSIZE)
		return -EIO;
	fh->size = len;
B
Benny Halevy 已提交
4786 4787 4788
	p = xdr_inline_decode(xdr, len);
	if (unlikely(!p))
		goto out_overflow;
B
Benny Halevy 已提交
4789
	memcpy(fh->data, p, len);
L
Linus Torvalds 已提交
4790
	return 0;
B
Benny Halevy 已提交
4791 4792 4793
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
L
Linus Torvalds 已提交
4794 4795 4796 4797 4798
}

static int decode_link(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
{
	int status;
4799

L
Linus Torvalds 已提交
4800 4801 4802 4803 4804 4805 4806 4807 4808
	status = decode_op_hdr(xdr, OP_LINK);
	if (status)
		return status;
	return decode_change_info(xdr, cinfo);
}

/*
 * We create the owner, so we know a proper owner.id length is 4.
 */
T
Trond Myklebust 已提交
4809
static int decode_lock_denied (struct xdr_stream *xdr, struct file_lock *fl)
L
Linus Torvalds 已提交
4810
{
T
Trond Myklebust 已提交
4811
	uint64_t offset, length, clientid;
A
Al Viro 已提交
4812
	__be32 *p;
T
Trond Myklebust 已提交
4813
	uint32_t namelen, type;
L
Linus Torvalds 已提交
4814

4815
	p = xdr_inline_decode(xdr, 32); /* read 32 bytes */
B
Benny Halevy 已提交
4816 4817
	if (unlikely(!p))
		goto out_overflow;
4818
	p = xdr_decode_hyper(p, &offset); /* read 2 8-byte long words */
B
Benny Halevy 已提交
4819
	p = xdr_decode_hyper(p, &length);
4820 4821
	type = be32_to_cpup(p++); /* 4 byte read */
	if (fl != NULL) { /* manipulate file lock */
T
Trond Myklebust 已提交
4822 4823 4824 4825 4826 4827 4828 4829 4830
		fl->fl_start = (loff_t)offset;
		fl->fl_end = fl->fl_start + (loff_t)length - 1;
		if (length == ~(uint64_t)0)
			fl->fl_end = OFFSET_MAX;
		fl->fl_type = F_WRLCK;
		if (type & 1)
			fl->fl_type = F_RDLCK;
		fl->fl_pid = 0;
	}
4831 4832 4833
	p = xdr_decode_hyper(p, &clientid); /* read 8 bytes */
	namelen = be32_to_cpup(p); /* read 4 bytes */  /* have read all 32 bytes now */
	p = xdr_inline_decode(xdr, namelen); /* variable size field */
B
Benny Halevy 已提交
4834 4835 4836 4837 4838
	if (likely(p))
		return -NFS4ERR_DENIED;
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
L
Linus Torvalds 已提交
4839 4840
}

T
Trond Myklebust 已提交
4841
static int decode_lock(struct xdr_stream *xdr, struct nfs_lock_res *res)
L
Linus Torvalds 已提交
4842 4843 4844 4845
{
	int status;

	status = decode_op_hdr(xdr, OP_LOCK);
4846 4847
	if (status == -EIO)
		goto out;
L
Linus Torvalds 已提交
4848
	if (status == 0) {
4849 4850 4851
		status = decode_stateid(xdr, &res->stateid);
		if (unlikely(status))
			goto out;
L
Linus Torvalds 已提交
4852
	} else if (status == -NFS4ERR_DENIED)
4853 4854 4855 4856 4857
		status = decode_lock_denied(xdr, NULL);
	if (res->open_seqid != NULL)
		nfs_increment_open_seqid(status, res->open_seqid);
	nfs_increment_lock_seqid(status, res->lock_seqid);
out:
L
Linus Torvalds 已提交
4858 4859 4860
	return status;
}

T
Trond Myklebust 已提交
4861
static int decode_lockt(struct xdr_stream *xdr, struct nfs_lockt_res *res)
L
Linus Torvalds 已提交
4862 4863 4864 4865
{
	int status;
	status = decode_op_hdr(xdr, OP_LOCKT);
	if (status == -NFS4ERR_DENIED)
T
Trond Myklebust 已提交
4866
		return decode_lock_denied(xdr, res->denied);
L
Linus Torvalds 已提交
4867 4868 4869
	return status;
}

T
Trond Myklebust 已提交
4870
static int decode_locku(struct xdr_stream *xdr, struct nfs_locku_res *res)
L
Linus Torvalds 已提交
4871 4872 4873 4874
{
	int status;

	status = decode_op_hdr(xdr, OP_LOCKU);
4875 4876
	if (status != -EIO)
		nfs_increment_lock_seqid(status, res->seqid);
4877 4878
	if (status == 0)
		status = decode_stateid(xdr, &res->stateid);
L
Linus Torvalds 已提交
4879 4880 4881
	return status;
}

4882 4883 4884 4885 4886
static int decode_release_lockowner(struct xdr_stream *xdr)
{
	return decode_op_hdr(xdr, OP_RELEASE_LOCKOWNER);
}

L
Linus Torvalds 已提交
4887 4888 4889 4890 4891 4892 4893 4894
static int decode_lookup(struct xdr_stream *xdr)
{
	return decode_op_hdr(xdr, OP_LOOKUP);
}

/* This is too sick! */
static int decode_space_limit(struct xdr_stream *xdr, u64 *maxsize)
{
A
Andy Adamson 已提交
4895
	__be32 *p;
L
Linus Torvalds 已提交
4896 4897
	uint32_t limit_type, nblocks, blocksize;

B
Benny Halevy 已提交
4898 4899 4900
	p = xdr_inline_decode(xdr, 12);
	if (unlikely(!p))
		goto out_overflow;
B
Benny Halevy 已提交
4901
	limit_type = be32_to_cpup(p++);
L
Linus Torvalds 已提交
4902
	switch (limit_type) {
A
Andy Adamson 已提交
4903
	case 1:
4904
		xdr_decode_hyper(p, maxsize);
A
Andy Adamson 已提交
4905 4906
		break;
	case 2:
B
Benny Halevy 已提交
4907
		nblocks = be32_to_cpup(p++);
4908
		blocksize = be32_to_cpup(p);
A
Andy Adamson 已提交
4909
		*maxsize = (uint64_t)nblocks * (uint64_t)blocksize;
L
Linus Torvalds 已提交
4910 4911
	}
	return 0;
B
Benny Halevy 已提交
4912 4913 4914
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
L
Linus Torvalds 已提交
4915 4916 4917 4918
}

static int decode_delegation(struct xdr_stream *xdr, struct nfs_openres *res)
{
A
Andy Adamson 已提交
4919 4920
	__be32 *p;
	uint32_t delegation_type;
4921
	int status;
L
Linus Torvalds 已提交
4922

B
Benny Halevy 已提交
4923 4924 4925
	p = xdr_inline_decode(xdr, 4);
	if (unlikely(!p))
		goto out_overflow;
4926
	delegation_type = be32_to_cpup(p);
L
Linus Torvalds 已提交
4927 4928 4929 4930
	if (delegation_type == NFS4_OPEN_DELEGATE_NONE) {
		res->delegation_type = 0;
		return 0;
	}
4931 4932 4933
	status = decode_stateid(xdr, &res->delegation);
	if (unlikely(status))
		return status;
B
Benny Halevy 已提交
4934 4935 4936
	p = xdr_inline_decode(xdr, 4);
	if (unlikely(!p))
		goto out_overflow;
4937
	res->do_recall = be32_to_cpup(p);
A
Andy Adamson 已提交
4938

L
Linus Torvalds 已提交
4939
	switch (delegation_type) {
A
Andy Adamson 已提交
4940 4941 4942 4943 4944 4945
	case NFS4_OPEN_DELEGATE_READ:
		res->delegation_type = FMODE_READ;
		break;
	case NFS4_OPEN_DELEGATE_WRITE:
		res->delegation_type = FMODE_WRITE|FMODE_READ;
		if (decode_space_limit(xdr, &res->maxsize) < 0)
L
Linus Torvalds 已提交
4946 4947
				return -EIO;
	}
4948
	return decode_ace(xdr, NULL, res->server->nfs_client);
B
Benny Halevy 已提交
4949 4950 4951
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
L
Linus Torvalds 已提交
4952 4953 4954 4955
}

static int decode_open(struct xdr_stream *xdr, struct nfs_openres *res)
{
A
Andy Adamson 已提交
4956
	__be32 *p;
4957
	uint32_t savewords, bmlen, i;
A
Andy Adamson 已提交
4958
	int status;
L
Linus Torvalds 已提交
4959

A
Andy Adamson 已提交
4960
	status = decode_op_hdr(xdr, OP_OPEN);
4961 4962
	if (status != -EIO)
		nfs_increment_open_seqid(status, res->seqid);
4963 4964 4965
	if (!status)
		status = decode_stateid(xdr, &res->stateid);
	if (unlikely(status))
A
Andy Adamson 已提交
4966
		return status;
L
Linus Torvalds 已提交
4967

A
Andy Adamson 已提交
4968
	decode_change_info(xdr, &res->cinfo);
L
Linus Torvalds 已提交
4969

B
Benny Halevy 已提交
4970 4971 4972
	p = xdr_inline_decode(xdr, 8);
	if (unlikely(!p))
		goto out_overflow;
B
Benny Halevy 已提交
4973
	res->rflags = be32_to_cpup(p++);
4974
	bmlen = be32_to_cpup(p);
A
Andy Adamson 已提交
4975 4976
	if (bmlen > 10)
		goto xdr_error;
L
Linus Torvalds 已提交
4977

B
Benny Halevy 已提交
4978 4979 4980
	p = xdr_inline_decode(xdr, bmlen << 2);
	if (unlikely(!p))
		goto out_overflow;
4981 4982
	savewords = min_t(uint32_t, bmlen, NFS4_BITMAP_SIZE);
	for (i = 0; i < savewords; ++i)
B
Benny Halevy 已提交
4983
		res->attrset[i] = be32_to_cpup(p++);
4984 4985 4986
	for (; i < NFS4_BITMAP_SIZE; i++)
		res->attrset[i] = 0;

L
Linus Torvalds 已提交
4987 4988
	return decode_delegation(xdr, res);
xdr_error:
4989
	dprintk("%s: Bitmap too large! Length = %u\n", __func__, bmlen);
L
Linus Torvalds 已提交
4990
	return -EIO;
B
Benny Halevy 已提交
4991 4992 4993
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
L
Linus Torvalds 已提交
4994 4995 4996 4997 4998 4999
}

static int decode_open_confirm(struct xdr_stream *xdr, struct nfs_open_confirmres *res)
{
	int status;

A
Andy Adamson 已提交
5000
	status = decode_op_hdr(xdr, OP_OPEN_CONFIRM);
5001 5002
	if (status != -EIO)
		nfs_increment_open_seqid(status, res->seqid);
5003 5004 5005
	if (!status)
		status = decode_stateid(xdr, &res->stateid);
	return status;
L
Linus Torvalds 已提交
5006 5007 5008 5009 5010 5011 5012
}

static int decode_open_downgrade(struct xdr_stream *xdr, struct nfs_closeres *res)
{
	int status;

	status = decode_op_hdr(xdr, OP_OPEN_DOWNGRADE);
5013 5014
	if (status != -EIO)
		nfs_increment_open_seqid(status, res->seqid);
5015 5016 5017
	if (!status)
		status = decode_stateid(xdr, &res->stateid);
	return status;
L
Linus Torvalds 已提交
5018 5019 5020 5021 5022 5023 5024 5025 5026 5027 5028 5029 5030 5031
}

static int decode_putfh(struct xdr_stream *xdr)
{
	return decode_op_hdr(xdr, OP_PUTFH);
}

static int decode_putrootfh(struct xdr_stream *xdr)
{
	return decode_op_hdr(xdr, OP_PUTROOTFH);
}

static int decode_read(struct xdr_stream *xdr, struct rpc_rqst *req, struct nfs_readres *res)
{
A
Al Viro 已提交
5032
	__be32 *p;
5033
	uint32_t count, eof, recvd;
L
Linus Torvalds 已提交
5034 5035 5036 5037 5038
	int status;

	status = decode_op_hdr(xdr, OP_READ);
	if (status)
		return status;
B
Benny Halevy 已提交
5039 5040 5041
	p = xdr_inline_decode(xdr, 8);
	if (unlikely(!p))
		goto out_overflow;
B
Benny Halevy 已提交
5042
	eof = be32_to_cpup(p++);
5043
	count = be32_to_cpup(p);
5044
	recvd = xdr_read_pages(xdr, count);
L
Linus Torvalds 已提交
5045
	if (count > recvd) {
5046
		dprintk("NFS: server cheating in read reply: "
L
Linus Torvalds 已提交
5047 5048 5049 5050 5051 5052 5053
				"count %u > recvd %u\n", count, recvd);
		count = recvd;
		eof = 0;
	}
	res->eof = eof;
	res->count = count;
	return 0;
B
Benny Halevy 已提交
5054 5055 5056
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
L
Linus Torvalds 已提交
5057 5058 5059 5060
}

static int decode_readdir(struct xdr_stream *xdr, struct rpc_rqst *req, struct nfs4_readdir_res *readdir)
{
5061
	int		status;
5062
	__be32		verf[2];
L
Linus Torvalds 已提交
5063 5064

	status = decode_op_hdr(xdr, OP_READDIR);
5065 5066 5067
	if (!status)
		status = decode_verifier(xdr, readdir->verifier.data);
	if (unlikely(status))
L
Linus Torvalds 已提交
5068
		return status;
5069
	memcpy(verf, readdir->verifier.data, sizeof(verf));
5070
	dprintk("%s: verifier = %08x:%08x\n",
5071
			__func__, verf[0], verf[1]);
5072
	return xdr_read_pages(xdr, xdr->buf->page_len);
L
Linus Torvalds 已提交
5073 5074 5075 5076 5077
}

static int decode_readlink(struct xdr_stream *xdr, struct rpc_rqst *req)
{
	struct xdr_buf *rcvbuf = &req->rq_rcv_buf;
5078
	u32 len, recvd;
A
Al Viro 已提交
5079
	__be32 *p;
L
Linus Torvalds 已提交
5080 5081 5082 5083 5084 5085 5086
	int status;

	status = decode_op_hdr(xdr, OP_READLINK);
	if (status)
		return status;

	/* Convert length of symlink */
B
Benny Halevy 已提交
5087 5088 5089
	p = xdr_inline_decode(xdr, 4);
	if (unlikely(!p))
		goto out_overflow;
5090
	len = be32_to_cpup(p);
L
Linus Torvalds 已提交
5091
	if (len >= rcvbuf->page_len || len <= 0) {
5092
		dprintk("nfs: server returned giant symlink!\n");
L
Linus Torvalds 已提交
5093 5094
		return -ENAMETOOLONG;
	}
5095
	recvd = xdr_read_pages(xdr, len);
L
Linus Torvalds 已提交
5096
	if (recvd < len) {
5097
		dprintk("NFS: server cheating in readlink reply: "
L
Linus Torvalds 已提交
5098 5099 5100 5101 5102 5103 5104 5105 5106 5107
				"count %u > recvd %u\n", len, recvd);
		return -EIO;
	}
	/*
	 * The XDR encode routine has set things up so that
	 * the link text will be copied directly into the
	 * buffer.  We just have to do overflow-checking,
	 * and and null-terminate the text (the VFS expects
	 * null-termination).
	 */
5108
	xdr_terminate_string(rcvbuf, len);
L
Linus Torvalds 已提交
5109
	return 0;
B
Benny Halevy 已提交
5110 5111 5112
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
L
Linus Torvalds 已提交
5113 5114 5115 5116 5117 5118 5119 5120 5121 5122 5123 5124 5125 5126 5127 5128 5129 5130 5131 5132 5133 5134 5135 5136 5137 5138 5139 5140 5141 5142 5143 5144 5145 5146
}

static int decode_remove(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
{
	int status;

	status = decode_op_hdr(xdr, OP_REMOVE);
	if (status)
		goto out;
	status = decode_change_info(xdr, cinfo);
out:
	return status;
}

static int decode_rename(struct xdr_stream *xdr, struct nfs4_change_info *old_cinfo,
	      struct nfs4_change_info *new_cinfo)
{
	int status;

	status = decode_op_hdr(xdr, OP_RENAME);
	if (status)
		goto out;
	if ((status = decode_change_info(xdr, old_cinfo)))
		goto out;
	status = decode_change_info(xdr, new_cinfo);
out:
	return status;
}

static int decode_renew(struct xdr_stream *xdr)
{
	return decode_op_hdr(xdr, OP_RENEW);
}

5147 5148 5149 5150 5151 5152
static int
decode_restorefh(struct xdr_stream *xdr)
{
	return decode_op_hdr(xdr, OP_RESTOREFH);
}

5153
static int decode_getacl(struct xdr_stream *xdr, struct rpc_rqst *req,
5154
			 struct nfs_getaclres *res)
5155
{
5156
	unsigned int savep;
5157
	uint32_t attrlen,
5158
		 bitmap[3] = {0};
5159
	int status;
5160
	unsigned int pg_offset;
5161

5162
	res->acl_len = 0;
5163 5164
	if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
		goto out;
5165

5166 5167
	xdr_enter_page(xdr, xdr->buf->page_len);

5168 5169
	/* Calculate the offset of the page data */
	pg_offset = xdr->buf->head[0].iov_len;
5170

5171 5172 5173 5174 5175 5176 5177 5178 5179
	if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
		goto out;
	if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
		goto out;

	if (unlikely(bitmap[0] & (FATTR4_WORD0_ACL - 1U)))
		return -EIO;
	if (likely(bitmap[0] & FATTR4_WORD0_ACL)) {

5180 5181 5182
		/* The bitmap (xdr len + bitmaps) and the attr xdr len words
		 * are stored with the acl data to handle the problem of
		 * variable length bitmaps.*/
5183
		res->acl_data_offset = xdr_stream_pos(xdr) - pg_offset;
5184
		res->acl_len = attrlen;
5185 5186 5187 5188 5189

		/* Check for receive buffer overflow */
		if (res->acl_len > (xdr->nwords << 2) ||
		    res->acl_len + res->acl_data_offset > xdr->buf->page_len) {
			res->acl_flags |= NFS4_ACL_TRUNC;
5190
			dprintk("NFS: acl reply: attrlen %u > page_len %u\n",
5191
					attrlen, xdr->nwords << 2);
5192
		}
J
J. Bruce Fields 已提交
5193 5194
	} else
		status = -EOPNOTSUPP;
5195 5196 5197 5198 5199

out:
	return status;
}

L
Linus Torvalds 已提交
5200 5201 5202 5203 5204 5205
static int
decode_savefh(struct xdr_stream *xdr)
{
	return decode_op_hdr(xdr, OP_SAVEFH);
}

5206
static int decode_setattr(struct xdr_stream *xdr)
L
Linus Torvalds 已提交
5207
{
A
Al Viro 已提交
5208
	__be32 *p;
L
Linus Torvalds 已提交
5209 5210 5211 5212 5213 5214
	uint32_t bmlen;
	int status;

	status = decode_op_hdr(xdr, OP_SETATTR);
	if (status)
		return status;
B
Benny Halevy 已提交
5215 5216 5217
	p = xdr_inline_decode(xdr, 4);
	if (unlikely(!p))
		goto out_overflow;
5218
	bmlen = be32_to_cpup(p);
B
Benny Halevy 已提交
5219 5220 5221 5222 5223 5224
	p = xdr_inline_decode(xdr, bmlen << 2);
	if (likely(p))
		return 0;
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
L
Linus Torvalds 已提交
5225 5226
}

5227
static int decode_setclientid(struct xdr_stream *xdr, struct nfs4_setclientid_res *res)
L
Linus Torvalds 已提交
5228
{
A
Al Viro 已提交
5229
	__be32 *p;
L
Linus Torvalds 已提交
5230 5231 5232
	uint32_t opnum;
	int32_t nfserr;

B
Benny Halevy 已提交
5233 5234 5235
	p = xdr_inline_decode(xdr, 8);
	if (unlikely(!p))
		goto out_overflow;
B
Benny Halevy 已提交
5236
	opnum = be32_to_cpup(p++);
L
Linus Torvalds 已提交
5237
	if (opnum != OP_SETCLIENTID) {
5238
		dprintk("nfs: decode_setclientid: Server returned operation"
5239
			" %d\n", opnum);
L
Linus Torvalds 已提交
5240 5241
		return -EIO;
	}
5242
	nfserr = be32_to_cpup(p);
L
Linus Torvalds 已提交
5243
	if (nfserr == NFS_OK) {
B
Benny Halevy 已提交
5244 5245 5246
		p = xdr_inline_decode(xdr, 8 + NFS4_VERIFIER_SIZE);
		if (unlikely(!p))
			goto out_overflow;
5247 5248
		p = xdr_decode_hyper(p, &res->clientid);
		memcpy(res->confirm.data, p, NFS4_VERIFIER_SIZE);
L
Linus Torvalds 已提交
5249 5250 5251 5252
	} else if (nfserr == NFSERR_CLID_INUSE) {
		uint32_t len;

		/* skip netid string */
B
Benny Halevy 已提交
5253 5254 5255
		p = xdr_inline_decode(xdr, 4);
		if (unlikely(!p))
			goto out_overflow;
5256
		len = be32_to_cpup(p);
B
Benny Halevy 已提交
5257 5258 5259
		p = xdr_inline_decode(xdr, len);
		if (unlikely(!p))
			goto out_overflow;
L
Linus Torvalds 已提交
5260 5261

		/* skip uaddr string */
B
Benny Halevy 已提交
5262 5263 5264
		p = xdr_inline_decode(xdr, 4);
		if (unlikely(!p))
			goto out_overflow;
5265
		len = be32_to_cpup(p);
B
Benny Halevy 已提交
5266 5267 5268
		p = xdr_inline_decode(xdr, len);
		if (unlikely(!p))
			goto out_overflow;
L
Linus Torvalds 已提交
5269 5270
		return -NFSERR_CLID_INUSE;
	} else
5271
		return nfs4_stat_to_errno(nfserr);
L
Linus Torvalds 已提交
5272 5273

	return 0;
B
Benny Halevy 已提交
5274 5275 5276
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
L
Linus Torvalds 已提交
5277 5278 5279 5280 5281 5282 5283 5284 5285
}

static int decode_setclientid_confirm(struct xdr_stream *xdr)
{
	return decode_op_hdr(xdr, OP_SETCLIENTID_CONFIRM);
}

static int decode_write(struct xdr_stream *xdr, struct nfs_writeres *res)
{
A
Al Viro 已提交
5286
	__be32 *p;
L
Linus Torvalds 已提交
5287 5288 5289 5290 5291 5292
	int status;

	status = decode_op_hdr(xdr, OP_WRITE);
	if (status)
		return status;

5293
	p = xdr_inline_decode(xdr, 8);
B
Benny Halevy 已提交
5294 5295
	if (unlikely(!p))
		goto out_overflow;
B
Benny Halevy 已提交
5296 5297
	res->count = be32_to_cpup(p++);
	res->verf->committed = be32_to_cpup(p++);
5298
	return decode_write_verifier(xdr, &res->verf->verifier);
B
Benny Halevy 已提交
5299 5300 5301
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
L
Linus Torvalds 已提交
5302 5303 5304 5305 5306 5307 5308
}

static int decode_delegreturn(struct xdr_stream *xdr)
{
	return decode_op_hdr(xdr, OP_DELEGRETURN);
}

5309 5310
static int decode_secinfo_gss(struct xdr_stream *xdr,
			      struct nfs4_secinfo4 *flavor)
B
Bryan Schumaker 已提交
5311
{
5312
	u32 oid_len;
B
Bryan Schumaker 已提交
5313 5314 5315 5316 5317
	__be32 *p;

	p = xdr_inline_decode(xdr, 4);
	if (unlikely(!p))
		goto out_overflow;
5318 5319
	oid_len = be32_to_cpup(p);
	if (oid_len > GSS_OID_MAX_LEN)
B
Bryan Schumaker 已提交
5320 5321
		goto out_err;

5322
	p = xdr_inline_decode(xdr, oid_len);
B
Bryan Schumaker 已提交
5323 5324
	if (unlikely(!p))
		goto out_overflow;
5325 5326
	memcpy(flavor->flavor_info.oid.data, p, oid_len);
	flavor->flavor_info.oid.len = oid_len;
B
Bryan Schumaker 已提交
5327 5328 5329 5330

	p = xdr_inline_decode(xdr, 8);
	if (unlikely(!p))
		goto out_overflow;
5331 5332
	flavor->flavor_info.qop = be32_to_cpup(p++);
	flavor->flavor_info.service = be32_to_cpup(p);
B
Bryan Schumaker 已提交
5333 5334 5335 5336 5337 5338 5339 5340 5341 5342

	return 0;

out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
out_err:
	return -EINVAL;
}

B
Bryan Schumaker 已提交
5343
static int decode_secinfo_common(struct xdr_stream *xdr, struct nfs4_secinfo_res *res)
B
Bryan Schumaker 已提交
5344
{
5345 5346
	struct nfs4_secinfo4 *sec_flavor;
	unsigned int i, num_flavors;
B
Bryan Schumaker 已提交
5347 5348 5349 5350 5351 5352 5353
	int status;
	__be32 *p;

	p = xdr_inline_decode(xdr, 4);
	if (unlikely(!p))
		goto out_overflow;

5354 5355 5356 5357
	res->flavors->num_flavors = 0;
	num_flavors = be32_to_cpup(p);

	for (i = 0; i < num_flavors; i++) {
B
Bryan Schumaker 已提交
5358
		sec_flavor = &res->flavors->flavors[i];
5359
		if ((char *)&sec_flavor[1] - (char *)res->flavors > PAGE_SIZE)
B
Bryan Schumaker 已提交
5360 5361 5362 5363 5364 5365 5366 5367
			break;

		p = xdr_inline_decode(xdr, 4);
		if (unlikely(!p))
			goto out_overflow;
		sec_flavor->flavor = be32_to_cpup(p);

		if (sec_flavor->flavor == RPC_AUTH_GSS) {
5368 5369 5370
			status = decode_secinfo_gss(xdr, sec_flavor);
			if (status)
				goto out;
B
Bryan Schumaker 已提交
5371
		}
5372
		res->flavors->num_flavors++;
B
Bryan Schumaker 已提交
5373 5374
	}

B
Bryan Schumaker 已提交
5375
	status = 0;
5376 5377
out:
	return status;
B
Bryan Schumaker 已提交
5378 5379 5380 5381 5382
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
}

B
Bryan Schumaker 已提交
5383 5384 5385 5386 5387 5388 5389 5390
static int decode_secinfo(struct xdr_stream *xdr, struct nfs4_secinfo_res *res)
{
	int status = decode_op_hdr(xdr, OP_SECINFO);
	if (status)
		return status;
	return decode_secinfo_common(xdr, res);
}

B
Benny Halevy 已提交
5391
#if defined(CONFIG_NFS_V4_1)
B
Bryan Schumaker 已提交
5392 5393 5394 5395 5396 5397 5398 5399
static int decode_secinfo_no_name(struct xdr_stream *xdr, struct nfs4_secinfo_res *res)
{
	int status = decode_op_hdr(xdr, OP_SECINFO_NO_NAME);
	if (status)
		return status;
	return decode_secinfo_common(xdr, res);
}

5400 5401 5402 5403 5404 5405 5406 5407 5408 5409 5410 5411 5412 5413 5414 5415 5416
static int decode_op_map(struct xdr_stream *xdr, struct nfs4_op_map *op_map)
{
	__be32 *p;
	uint32_t bitmap_words;
	unsigned int i;

	p = xdr_inline_decode(xdr, 4);
	bitmap_words = be32_to_cpup(p++);
	if (bitmap_words > NFS4_OP_MAP_NUM_WORDS)
		return -EIO;
	p = xdr_inline_decode(xdr, 4 * bitmap_words);
	for (i = 0; i < bitmap_words; i++)
		op_map->u.words[i] = be32_to_cpup(p++);

	return 0;
}

B
Benny Halevy 已提交
5417 5418 5419 5420 5421
static int decode_exchange_id(struct xdr_stream *xdr,
			      struct nfs41_exchange_id_res *res)
{
	__be32 *p;
	uint32_t dummy;
5422
	char *dummy_str;
B
Benny Halevy 已提交
5423
	int status;
5424
	uint32_t impl_id_count;
B
Benny Halevy 已提交
5425 5426 5427 5428 5429

	status = decode_op_hdr(xdr, OP_EXCHANGE_ID);
	if (status)
		return status;

B
Benny Halevy 已提交
5430 5431 5432
	p = xdr_inline_decode(xdr, 8);
	if (unlikely(!p))
		goto out_overflow;
5433
	xdr_decode_hyper(p, &res->clientid);
B
Benny Halevy 已提交
5434 5435 5436
	p = xdr_inline_decode(xdr, 12);
	if (unlikely(!p))
		goto out_overflow;
5437 5438
	res->seqid = be32_to_cpup(p++);
	res->flags = be32_to_cpup(p++);
B
Benny Halevy 已提交
5439

5440 5441 5442 5443 5444 5445 5446 5447 5448 5449 5450 5451 5452 5453
	res->state_protect.how = be32_to_cpup(p);
	switch (res->state_protect.how) {
	case SP4_NONE:
		break;
	case SP4_MACH_CRED:
		status = decode_op_map(xdr, &res->state_protect.enforce);
		if (status)
			return status;
		status = decode_op_map(xdr, &res->state_protect.allow);
		if (status)
			return status;
		break;
	default:
		WARN_ON_ONCE(1);
B
Benny Halevy 已提交
5454
		return -EIO;
5455
	}
B
Benny Halevy 已提交
5456

5457
	/* server_owner4.so_minor_id */
B
Benny Halevy 已提交
5458 5459 5460
	p = xdr_inline_decode(xdr, 8);
	if (unlikely(!p))
		goto out_overflow;
5461
	p = xdr_decode_hyper(p, &res->server_owner->minor_id);
B
Benny Halevy 已提交
5462

5463
	/* server_owner4.so_major_id */
5464 5465 5466
	status = decode_opaque_inline(xdr, &dummy, &dummy_str);
	if (unlikely(status))
		return status;
5467 5468 5469 5470
	if (unlikely(dummy > NFS4_OPAQUE_LIMIT))
		return -EIO;
	memcpy(res->server_owner->major_id, dummy_str, dummy);
	res->server_owner->major_id_sz = dummy;
B
Benny Halevy 已提交
5471

5472
	/* server_scope4 */
5473 5474 5475
	status = decode_opaque_inline(xdr, &dummy, &dummy_str);
	if (unlikely(status))
		return status;
5476 5477 5478 5479 5480
	if (unlikely(dummy > NFS4_OPAQUE_LIMIT))
		return -EIO;
	memcpy(res->server_scope->server_scope, dummy_str, dummy);
	res->server_scope->server_scope_sz = dummy;

5481 5482 5483 5484 5485
	/* Implementation Id */
	p = xdr_inline_decode(xdr, 4);
	if (unlikely(!p))
		goto out_overflow;
	impl_id_count = be32_to_cpup(p++);
B
Benny Halevy 已提交
5486

5487 5488 5489 5490 5491 5492 5493 5494 5495 5496 5497 5498 5499 5500 5501 5502 5503 5504 5505 5506 5507 5508 5509 5510 5511 5512
	if (impl_id_count) {
		/* nii_domain */
		status = decode_opaque_inline(xdr, &dummy, &dummy_str);
		if (unlikely(status))
			return status;
		if (unlikely(dummy > NFS4_OPAQUE_LIMIT))
			return -EIO;
		memcpy(res->impl_id->domain, dummy_str, dummy);

		/* nii_name */
		status = decode_opaque_inline(xdr, &dummy, &dummy_str);
		if (unlikely(status))
			return status;
		if (unlikely(dummy > NFS4_OPAQUE_LIMIT))
			return -EIO;
		memcpy(res->impl_id->name, dummy_str, dummy);

		/* nii_date */
		p = xdr_inline_decode(xdr, 12);
		if (unlikely(!p))
			goto out_overflow;
		p = xdr_decode_hyper(p, &res->impl_id->date.seconds);
		res->impl_id->date.nseconds = be32_to_cpup(p);

		/* if there's more than one entry, ignore the rest */
	}
B
Benny Halevy 已提交
5513
	return 0;
B
Benny Halevy 已提交
5514 5515 5516
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
B
Benny Halevy 已提交
5517
}
A
Andy Adamson 已提交
5518 5519 5520 5521 5522

static int decode_chan_attrs(struct xdr_stream *xdr,
			     struct nfs4_channel_attrs *attrs)
{
	__be32 *p;
5523
	u32 nr_attrs, val;
A
Andy Adamson 已提交
5524

B
Benny Halevy 已提交
5525 5526 5527
	p = xdr_inline_decode(xdr, 28);
	if (unlikely(!p))
		goto out_overflow;
5528 5529 5530
	val = be32_to_cpup(p++);	/* headerpadsz */
	if (val)
		return -EINVAL;		/* no support for header padding yet */
B
Benny Halevy 已提交
5531 5532 5533 5534 5535
	attrs->max_rqst_sz = be32_to_cpup(p++);
	attrs->max_resp_sz = be32_to_cpup(p++);
	attrs->max_resp_sz_cached = be32_to_cpup(p++);
	attrs->max_ops = be32_to_cpup(p++);
	attrs->max_reqs = be32_to_cpup(p++);
5536
	nr_attrs = be32_to_cpup(p);
A
Andy Adamson 已提交
5537
	if (unlikely(nr_attrs > 1)) {
5538 5539
		printk(KERN_WARNING "NFS: %s: Invalid rdma channel attrs "
			"count %u\n", __func__, nr_attrs);
A
Andy Adamson 已提交
5540 5541
		return -EINVAL;
	}
B
Benny Halevy 已提交
5542 5543 5544 5545 5546
	if (nr_attrs == 1) {
		p = xdr_inline_decode(xdr, 4); /* skip rdma_attrs */
		if (unlikely(!p))
			goto out_overflow;
	}
A
Andy Adamson 已提交
5547
	return 0;
B
Benny Halevy 已提交
5548 5549 5550
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
A
Andy Adamson 已提交
5551 5552
}

5553 5554 5555
static int decode_sessionid(struct xdr_stream *xdr, struct nfs4_sessionid *sid)
{
	return decode_opaque_fixed(xdr, sid->data, NFS4_MAX_SESSIONID_LEN);
A
Andy Adamson 已提交
5556 5557
}

5558 5559 5560 5561 5562 5563 5564 5565 5566 5567 5568 5569 5570 5571 5572 5573 5574 5575 5576 5577 5578 5579 5580 5581 5582 5583 5584 5585 5586 5587 5588
static int decode_bind_conn_to_session(struct xdr_stream *xdr,
				struct nfs41_bind_conn_to_session_res *res)
{
	__be32 *p;
	int status;

	status = decode_op_hdr(xdr, OP_BIND_CONN_TO_SESSION);
	if (!status)
		status = decode_sessionid(xdr, &res->session->sess_id);
	if (unlikely(status))
		return status;

	/* dir flags, rdma mode bool */
	p = xdr_inline_decode(xdr, 8);
	if (unlikely(!p))
		goto out_overflow;

	res->dir = be32_to_cpup(p++);
	if (res->dir == 0 || res->dir > NFS4_CDFS4_BOTH)
		return -EIO;
	if (be32_to_cpup(p) == 0)
		res->use_conn_in_rdma_mode = false;
	else
		res->use_conn_in_rdma_mode = true;

	return 0;
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
}

A
Andy Adamson 已提交
5589 5590 5591 5592 5593 5594 5595 5596 5597
static int decode_create_session(struct xdr_stream *xdr,
				 struct nfs41_create_session_res *res)
{
	__be32 *p;
	int status;
	struct nfs_client *clp = res->client;
	struct nfs4_session *session = clp->cl_session;

	status = decode_op_hdr(xdr, OP_CREATE_SESSION);
5598 5599 5600
	if (!status)
		status = decode_sessionid(xdr, &session->sess_id);
	if (unlikely(status))
A
Andy Adamson 已提交
5601 5602 5603
		return status;

	/* seqid, flags */
B
Benny Halevy 已提交
5604 5605 5606
	p = xdr_inline_decode(xdr, 8);
	if (unlikely(!p))
		goto out_overflow;
B
Benny Halevy 已提交
5607
	clp->cl_seqid = be32_to_cpup(p++);
5608
	session->flags = be32_to_cpup(p);
A
Andy Adamson 已提交
5609 5610 5611 5612 5613 5614

	/* Channel attributes */
	status = decode_chan_attrs(xdr, &session->fc_attrs);
	if (!status)
		status = decode_chan_attrs(xdr, &session->bc_attrs);
	return status;
B
Benny Halevy 已提交
5615 5616 5617
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
A
Andy Adamson 已提交
5618
}
A
Andy Adamson 已提交
5619 5620 5621 5622 5623

static int decode_destroy_session(struct xdr_stream *xdr, void *dummy)
{
	return decode_op_hdr(xdr, OP_DESTROY_SESSION);
}
5624

T
Trond Myklebust 已提交
5625 5626 5627 5628 5629
static int decode_destroy_clientid(struct xdr_stream *xdr, void *dummy)
{
	return decode_op_hdr(xdr, OP_DESTROY_CLIENTID);
}

5630 5631 5632 5633
static int decode_reclaim_complete(struct xdr_stream *xdr, void *dummy)
{
	return decode_op_hdr(xdr, OP_RECLAIM_COMPLETE);
}
B
Benny Halevy 已提交
5634 5635
#endif /* CONFIG_NFS_V4_1 */

5636 5637 5638 5639 5640
static int decode_sequence(struct xdr_stream *xdr,
			   struct nfs4_sequence_res *res,
			   struct rpc_rqst *rqstp)
{
#if defined(CONFIG_NFS_V4_1)
5641
	struct nfs4_session *session;
A
Andy Adamson 已提交
5642 5643 5644 5645 5646
	struct nfs4_sessionid id;
	u32 dummy;
	int status;
	__be32 *p;

5647
	if (res->sr_slot == NULL)
5648
		return 0;
C
Chuck Lever 已提交
5649 5650
	if (!res->sr_slot->table->session)
		return 0;
5651

A
Andy Adamson 已提交
5652
	status = decode_op_hdr(xdr, OP_SEQUENCE);
5653 5654 5655
	if (!status)
		status = decode_sessionid(xdr, &id);
	if (unlikely(status))
A
Andy Adamson 已提交
5656
		goto out_err;
5657

A
Andy Adamson 已提交
5658 5659 5660 5661
	/*
	 * If the server returns different values for sessionID, slotID or
	 * sequence number, the server is looney tunes.
	 */
5662
	status = -EREMOTEIO;
5663
	session = res->sr_slot->table->session;
A
Andy Adamson 已提交
5664

5665
	if (memcmp(id.data, session->sess_id.data,
A
Andy Adamson 已提交
5666 5667 5668 5669
		   NFS4_MAX_SESSIONID_LEN)) {
		dprintk("%s Invalid session id\n", __func__);
		goto out_err;
	}
5670

B
Benny Halevy 已提交
5671 5672 5673
	p = xdr_inline_decode(xdr, 20);
	if (unlikely(!p))
		goto out_overflow;
5674

A
Andy Adamson 已提交
5675
	/* seqid */
B
Benny Halevy 已提交
5676
	dummy = be32_to_cpup(p++);
5677
	if (dummy != res->sr_slot->seq_nr) {
A
Andy Adamson 已提交
5678 5679 5680 5681
		dprintk("%s Invalid sequence number\n", __func__);
		goto out_err;
	}
	/* slot id */
B
Benny Halevy 已提交
5682
	dummy = be32_to_cpup(p++);
5683
	if (dummy != res->sr_slot->slot_nr) {
A
Andy Adamson 已提交
5684 5685 5686
		dprintk("%s Invalid slot id\n", __func__);
		goto out_err;
	}
5687 5688
	/* highest slot id */
	res->sr_highest_slotid = be32_to_cpup(p++);
5689 5690
	/* target highest slot id */
	res->sr_target_highest_slotid = be32_to_cpup(p++);
5691 5692
	/* result flags */
	res->sr_status_flags = be32_to_cpup(p);
A
Andy Adamson 已提交
5693 5694 5695 5696
	status = 0;
out_err:
	res->sr_status = status;
	return status;
B
Benny Halevy 已提交
5697 5698 5699 5700
out_overflow:
	print_overflow_msg(__func__, xdr);
	status = -EIO;
	goto out_err;
A
Andy Adamson 已提交
5701
#else  /* CONFIG_NFS_V4_1 */
5702
	return 0;
A
Andy Adamson 已提交
5703
#endif /* CONFIG_NFS_V4_1 */
5704 5705
}

5706
#if defined(CONFIG_NFS_V4_1)
A
Andy Adamson 已提交
5707 5708 5709 5710 5711 5712 5713 5714
/*
 * TODO: Need to handle case when EOF != true;
 */
static int decode_getdevicelist(struct xdr_stream *xdr,
				struct pnfs_devicelist *res)
{
	__be32 *p;
	int status, i;
5715
	nfs4_verifier verftemp;
A
Andy Adamson 已提交
5716 5717 5718 5719 5720 5721 5722 5723 5724 5725 5726 5727 5728

	status = decode_op_hdr(xdr, OP_GETDEVICELIST);
	if (status)
		return status;

	p = xdr_inline_decode(xdr, 8 + 8 + 4);
	if (unlikely(!p))
		goto out_overflow;

	/* TODO: Skip cookie for now */
	p += 2;

	/* Read verifier */
5729
	p = xdr_decode_opaque_fixed(p, verftemp.data, NFS4_VERIFIER_SIZE);
A
Andy Adamson 已提交
5730 5731 5732 5733 5734 5735

	res->num_devs = be32_to_cpup(p);

	dprintk("%s: num_dev %d\n", __func__, res->num_devs);

	if (res->num_devs > NFS4_PNFS_GETDEVLIST_MAXNUM) {
5736
		printk(KERN_ERR "NFS: %s too many result dev_num %u\n",
A
Andy Adamson 已提交
5737 5738 5739 5740 5741 5742 5743 5744 5745 5746 5747 5748 5749 5750 5751 5752 5753
				__func__, res->num_devs);
		return -EIO;
	}

	p = xdr_inline_decode(xdr,
			      res->num_devs * NFS4_DEVICEID4_SIZE + 4);
	if (unlikely(!p))
		goto out_overflow;
	for (i = 0; i < res->num_devs; i++)
		p = xdr_decode_opaque_fixed(p, res->dev_id[i].data,
					    NFS4_DEVICEID4_SIZE);
	res->eof = be32_to_cpup(p);
	return 0;
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
}
5754 5755 5756 5757 5758 5759 5760 5761 5762 5763 5764 5765 5766 5767 5768 5769 5770 5771 5772 5773 5774 5775 5776 5777 5778 5779 5780 5781 5782 5783 5784 5785 5786 5787 5788 5789

static int decode_getdeviceinfo(struct xdr_stream *xdr,
				struct pnfs_device *pdev)
{
	__be32 *p;
	uint32_t len, type;
	int status;

	status = decode_op_hdr(xdr, OP_GETDEVICEINFO);
	if (status) {
		if (status == -ETOOSMALL) {
			p = xdr_inline_decode(xdr, 4);
			if (unlikely(!p))
				goto out_overflow;
			pdev->mincount = be32_to_cpup(p);
			dprintk("%s: Min count too small. mincnt = %u\n",
				__func__, pdev->mincount);
		}
		return status;
	}

	p = xdr_inline_decode(xdr, 8);
	if (unlikely(!p))
		goto out_overflow;
	type = be32_to_cpup(p++);
	if (type != pdev->layout_type) {
		dprintk("%s: layout mismatch req: %u pdev: %u\n",
			__func__, pdev->layout_type, type);
		return -EINVAL;
	}
	/*
	 * Get the length of the opaque device_addr4. xdr_read_pages places
	 * the opaque device_addr4 in the xdr_buf->pages (pnfs_device->pages)
	 * and places the remaining xdr data in xdr_buf->tail
	 */
	pdev->mincount = be32_to_cpup(p);
5790 5791
	if (xdr_read_pages(xdr, pdev->mincount) != pdev->mincount)
		goto out_overflow;
5792 5793 5794 5795 5796 5797 5798

	/* Parse notification bitmap, verifying that it is zero. */
	p = xdr_inline_decode(xdr, 4);
	if (unlikely(!p))
		goto out_overflow;
	len = be32_to_cpup(p);
	if (len) {
5799
		uint32_t i;
5800 5801 5802 5803 5804 5805 5806 5807 5808 5809 5810 5811 5812 5813 5814 5815 5816 5817 5818 5819 5820 5821 5822 5823

		p = xdr_inline_decode(xdr, 4 * len);
		if (unlikely(!p))
			goto out_overflow;
		for (i = 0; i < len; i++, p++) {
			if (be32_to_cpup(p)) {
				dprintk("%s: notifications not supported\n",
					__func__);
				return -EIO;
			}
		}
	}
	return 0;
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
}

static int decode_layoutget(struct xdr_stream *xdr, struct rpc_rqst *req,
			    struct nfs4_layoutget_res *res)
{
	__be32 *p;
	int status;
	u32 layout_count;
5824
	u32 recvd;
5825 5826 5827 5828

	status = decode_op_hdr(xdr, OP_LAYOUTGET);
	if (status)
		return status;
5829 5830 5831 5832 5833 5834
	p = xdr_inline_decode(xdr, 4);
	if (unlikely(!p))
		goto out_overflow;
	res->return_on_close = be32_to_cpup(p);
	decode_stateid(xdr, &res->stateid);
	p = xdr_inline_decode(xdr, 4);
5835 5836 5837 5838 5839 5840 5841 5842 5843
	if (unlikely(!p))
		goto out_overflow;
	layout_count = be32_to_cpup(p);
	if (!layout_count) {
		dprintk("%s: server responded with empty layout array\n",
			__func__);
		return -EINVAL;
	}

5844
	p = xdr_inline_decode(xdr, 28);
5845 5846 5847 5848 5849 5850
	if (unlikely(!p))
		goto out_overflow;
	p = xdr_decode_hyper(p, &res->range.offset);
	p = xdr_decode_hyper(p, &res->range.length);
	res->range.iomode = be32_to_cpup(p++);
	res->type = be32_to_cpup(p++);
5851
	res->layoutp->len = be32_to_cpup(p);
5852 5853 5854 5855 5856 5857 5858

	dprintk("%s roff:%lu rlen:%lu riomode:%d, lo_type:0x%x, lo.len:%d\n",
		__func__,
		(unsigned long)res->range.offset,
		(unsigned long)res->range.length,
		res->range.iomode,
		res->type,
5859 5860
		res->layoutp->len);

5861
	recvd = xdr_read_pages(xdr, res->layoutp->len);
5862 5863 5864 5865 5866 5867
	if (res->layoutp->len > recvd) {
		dprintk("NFS: server cheating in layoutget reply: "
				"layout len %u > recvd %u\n",
				res->layoutp->len, recvd);
		return -EINVAL;
	}
5868 5869 5870 5871 5872 5873 5874 5875 5876 5877 5878 5879 5880 5881 5882 5883

	if (layout_count > 1) {
		/* We only handle a length one array at the moment.  Any
		 * further entries are just ignored.  Note that this means
		 * the client may see a response that is less than the
		 * minimum it requested.
		 */
		dprintk("%s: server responded with %d layouts, dropping tail\n",
			__func__, layout_count);
	}

	return 0;
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
}
A
Andy Adamson 已提交
5884

B
Benny Halevy 已提交
5885 5886 5887 5888 5889 5890 5891 5892 5893 5894 5895 5896 5897 5898 5899 5900 5901 5902 5903 5904 5905
static int decode_layoutreturn(struct xdr_stream *xdr,
			       struct nfs4_layoutreturn_res *res)
{
	__be32 *p;
	int status;

	status = decode_op_hdr(xdr, OP_LAYOUTRETURN);
	if (status)
		return status;
	p = xdr_inline_decode(xdr, 4);
	if (unlikely(!p))
		goto out_overflow;
	res->lrs_present = be32_to_cpup(p);
	if (res->lrs_present)
		status = decode_stateid(xdr, &res->stateid);
	return status;
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
}

A
Andy Adamson 已提交
5906 5907 5908 5909 5910 5911 5912 5913 5914
static int decode_layoutcommit(struct xdr_stream *xdr,
			       struct rpc_rqst *req,
			       struct nfs4_layoutcommit_res *res)
{
	__be32 *p;
	__u32 sizechanged;
	int status;

	status = decode_op_hdr(xdr, OP_LAYOUTCOMMIT);
A
Andy Adamson 已提交
5915
	res->status = status;
A
Andy Adamson 已提交
5916 5917 5918 5919 5920 5921 5922 5923 5924 5925 5926 5927 5928 5929 5930 5931 5932 5933 5934
	if (status)
		return status;

	p = xdr_inline_decode(xdr, 4);
	if (unlikely(!p))
		goto out_overflow;
	sizechanged = be32_to_cpup(p);

	if (sizechanged) {
		/* throw away new size */
		p = xdr_inline_decode(xdr, 8);
		if (unlikely(!p))
			goto out_overflow;
	}
	return 0;
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
}
B
Bryan Schumaker 已提交
5935 5936 5937 5938 5939 5940 5941 5942 5943 5944 5945 5946 5947 5948 5949 5950 5951 5952 5953 5954 5955 5956 5957

static int decode_test_stateid(struct xdr_stream *xdr,
			       struct nfs41_test_stateid_res *res)
{
	__be32 *p;
	int status;
	int num_res;

	status = decode_op_hdr(xdr, OP_TEST_STATEID);
	if (status)
		return status;

	p = xdr_inline_decode(xdr, 4);
	if (unlikely(!p))
		goto out_overflow;
	num_res = be32_to_cpup(p++);
	if (num_res != 1)
		goto out;

	p = xdr_inline_decode(xdr, 4);
	if (unlikely(!p))
		goto out_overflow;
	res->status = be32_to_cpup(p++);
5958 5959

	return status;
B
Bryan Schumaker 已提交
5960 5961 5962 5963 5964
out_overflow:
	print_overflow_msg(__func__, xdr);
out:
	return -EIO;
}
B
Bryan Schumaker 已提交
5965 5966 5967 5968

static int decode_free_stateid(struct xdr_stream *xdr,
			       struct nfs41_free_stateid_res *res)
{
A
Andy Adamson 已提交
5969
	res->status = decode_op_hdr(xdr, OP_FREE_STATEID);
B
Bryan Schumaker 已提交
5970 5971
	return res->status;
}
5972 5973
#endif /* CONFIG_NFS_V4_1 */

5974 5975 5976 5977
/*
 * END OF "GENERIC" DECODE ROUTINES.
 */

L
Linus Torvalds 已提交
5978 5979 5980
/*
 * Decode OPEN_DOWNGRADE response
 */
5981 5982 5983
static int nfs4_xdr_dec_open_downgrade(struct rpc_rqst *rqstp,
				       struct xdr_stream *xdr,
				       struct nfs_closeres *res)
L
Linus Torvalds 已提交
5984
{
A
Andy Adamson 已提交
5985 5986 5987
	struct compound_hdr hdr;
	int status;

5988
	status = decode_compound_hdr(xdr, &hdr);
5989 5990
	if (status)
		goto out;
5991
	status = decode_sequence(xdr, &res->seq_res, rqstp);
A
Andy Adamson 已提交
5992 5993
	if (status)
		goto out;
5994
	status = decode_putfh(xdr);
A
Andy Adamson 已提交
5995 5996
	if (status)
		goto out;
5997
	status = decode_open_downgrade(xdr, res);
5998 5999
	if (status != 0)
		goto out;
6000
	decode_getfattr(xdr, res->fattr, res->server);
L
Linus Torvalds 已提交
6001
out:
A
Andy Adamson 已提交
6002
	return status;
L
Linus Torvalds 已提交
6003 6004 6005 6006 6007
}

/*
 * Decode ACCESS response
 */
6008 6009
static int nfs4_xdr_dec_access(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
			       struct nfs4_accessres *res)
L
Linus Torvalds 已提交
6010 6011 6012
{
	struct compound_hdr hdr;
	int status;
6013

6014
	status = decode_compound_hdr(xdr, &hdr);
6015 6016
	if (status)
		goto out;
6017
	status = decode_sequence(xdr, &res->seq_res, rqstp);
6018
	if (status)
L
Linus Torvalds 已提交
6019
		goto out;
6020
	status = decode_putfh(xdr);
6021 6022
	if (status != 0)
		goto out;
6023
	status = decode_access(xdr, &res->supported, &res->access);
6024 6025
	if (status != 0)
		goto out;
6026
	decode_getfattr(xdr, res->fattr, res->server);
L
Linus Torvalds 已提交
6027 6028 6029 6030 6031 6032 6033
out:
	return status;
}

/*
 * Decode LOOKUP response
 */
6034 6035
static int nfs4_xdr_dec_lookup(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
			       struct nfs4_lookup_res *res)
L
Linus Torvalds 已提交
6036 6037 6038
{
	struct compound_hdr hdr;
	int status;
6039

6040
	status = decode_compound_hdr(xdr, &hdr);
6041 6042
	if (status)
		goto out;
6043
	status = decode_sequence(xdr, &res->seq_res, rqstp);
6044
	if (status)
L
Linus Torvalds 已提交
6045
		goto out;
6046 6047
	status = decode_putfh(xdr);
	if (status)
L
Linus Torvalds 已提交
6048
		goto out;
6049 6050
	status = decode_lookup(xdr);
	if (status)
L
Linus Torvalds 已提交
6051
		goto out;
6052 6053
	status = decode_getfh(xdr, res->fh);
	if (status)
L
Linus Torvalds 已提交
6054
		goto out;
6055
	status = decode_getfattr_label(xdr, res->fattr, res->label, res->server);
L
Linus Torvalds 已提交
6056 6057 6058 6059 6060 6061 6062
out:
	return status;
}

/*
 * Decode LOOKUP_ROOT response
 */
6063 6064 6065
static int nfs4_xdr_dec_lookup_root(struct rpc_rqst *rqstp,
				    struct xdr_stream *xdr,
				    struct nfs4_lookup_res *res)
L
Linus Torvalds 已提交
6066 6067 6068
{
	struct compound_hdr hdr;
	int status;
6069

6070
	status = decode_compound_hdr(xdr, &hdr);
6071 6072
	if (status)
		goto out;
6073
	status = decode_sequence(xdr, &res->seq_res, rqstp);
6074
	if (status)
L
Linus Torvalds 已提交
6075
		goto out;
6076 6077
	status = decode_putrootfh(xdr);
	if (status)
L
Linus Torvalds 已提交
6078
		goto out;
6079 6080
	status = decode_getfh(xdr, res->fh);
	if (status == 0)
6081 6082
		status = decode_getfattr_label(xdr, res->fattr,
						res->label, res->server);
L
Linus Torvalds 已提交
6083 6084 6085 6086 6087 6088 6089
out:
	return status;
}

/*
 * Decode REMOVE response
 */
6090 6091
static int nfs4_xdr_dec_remove(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
			       struct nfs_removeres *res)
L
Linus Torvalds 已提交
6092 6093 6094
{
	struct compound_hdr hdr;
	int status;
6095

6096
	status = decode_compound_hdr(xdr, &hdr);
6097 6098
	if (status)
		goto out;
6099
	status = decode_sequence(xdr, &res->seq_res, rqstp);
6100
	if (status)
L
Linus Torvalds 已提交
6101
		goto out;
6102 6103
	status = decode_putfh(xdr);
	if (status)
6104
		goto out;
6105
	status = decode_remove(xdr, &res->cinfo);
L
Linus Torvalds 已提交
6106 6107 6108 6109 6110 6111 6112
out:
	return status;
}

/*
 * Decode RENAME response
 */
6113 6114
static int nfs4_xdr_dec_rename(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
			       struct nfs_renameres *res)
L
Linus Torvalds 已提交
6115 6116 6117
{
	struct compound_hdr hdr;
	int status;
6118

6119
	status = decode_compound_hdr(xdr, &hdr);
6120 6121
	if (status)
		goto out;
6122
	status = decode_sequence(xdr, &res->seq_res, rqstp);
6123
	if (status)
L
Linus Torvalds 已提交
6124
		goto out;
6125 6126
	status = decode_putfh(xdr);
	if (status)
L
Linus Torvalds 已提交
6127
		goto out;
6128 6129
	status = decode_savefh(xdr);
	if (status)
L
Linus Torvalds 已提交
6130
		goto out;
6131 6132
	status = decode_putfh(xdr);
	if (status)
L
Linus Torvalds 已提交
6133
		goto out;
6134
	status = decode_rename(xdr, &res->old_cinfo, &res->new_cinfo);
L
Linus Torvalds 已提交
6135 6136 6137 6138 6139 6140 6141
out:
	return status;
}

/*
 * Decode LINK response
 */
6142 6143
static int nfs4_xdr_dec_link(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
			     struct nfs4_link_res *res)
L
Linus Torvalds 已提交
6144 6145 6146
{
	struct compound_hdr hdr;
	int status;
6147

6148
	status = decode_compound_hdr(xdr, &hdr);
6149 6150
	if (status)
		goto out;
6151
	status = decode_sequence(xdr, &res->seq_res, rqstp);
6152
	if (status)
L
Linus Torvalds 已提交
6153
		goto out;
6154 6155
	status = decode_putfh(xdr);
	if (status)
L
Linus Torvalds 已提交
6156
		goto out;
6157 6158
	status = decode_savefh(xdr);
	if (status)
L
Linus Torvalds 已提交
6159
		goto out;
6160 6161
	status = decode_putfh(xdr);
	if (status)
L
Linus Torvalds 已提交
6162
		goto out;
6163 6164
	status = decode_link(xdr, &res->cinfo);
	if (status)
6165 6166 6167 6168 6169
		goto out;
	/*
	 * Note order: OP_LINK leaves the directory as the current
	 *             filehandle.
	 */
6170 6171
	status = decode_restorefh(xdr);
	if (status)
6172
		goto out;
6173
	decode_getfattr_label(xdr, res->fattr, res->label, res->server);
L
Linus Torvalds 已提交
6174 6175 6176 6177 6178 6179 6180
out:
	return status;
}

/*
 * Decode CREATE response
 */
6181 6182
static int nfs4_xdr_dec_create(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
			       struct nfs4_create_res *res)
L
Linus Torvalds 已提交
6183 6184 6185
{
	struct compound_hdr hdr;
	int status;
6186

6187
	status = decode_compound_hdr(xdr, &hdr);
6188 6189
	if (status)
		goto out;
6190
	status = decode_sequence(xdr, &res->seq_res, rqstp);
6191
	if (status)
L
Linus Torvalds 已提交
6192
		goto out;
6193 6194
	status = decode_putfh(xdr);
	if (status)
6195
		goto out;
6196 6197
	status = decode_create(xdr, &res->dir_cinfo);
	if (status)
L
Linus Torvalds 已提交
6198
		goto out;
6199 6200
	status = decode_getfh(xdr, res->fh);
	if (status)
L
Linus Torvalds 已提交
6201
		goto out;
6202
	decode_getfattr_label(xdr, res->fattr, res->label, res->server);
L
Linus Torvalds 已提交
6203 6204 6205 6206 6207 6208 6209
out:
	return status;
}

/*
 * Decode SYMLINK response
 */
6210 6211
static int nfs4_xdr_dec_symlink(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
				struct nfs4_create_res *res)
L
Linus Torvalds 已提交
6212
{
6213
	return nfs4_xdr_dec_create(rqstp, xdr, res);
L
Linus Torvalds 已提交
6214 6215 6216 6217 6218
}

/*
 * Decode GETATTR response
 */
6219 6220
static int nfs4_xdr_dec_getattr(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
				struct nfs4_getattr_res *res)
L
Linus Torvalds 已提交
6221 6222 6223
{
	struct compound_hdr hdr;
	int status;
6224

6225
	status = decode_compound_hdr(xdr, &hdr);
6226 6227
	if (status)
		goto out;
6228
	status = decode_sequence(xdr, &res->seq_res, rqstp);
L
Linus Torvalds 已提交
6229 6230
	if (status)
		goto out;
6231
	status = decode_putfh(xdr);
L
Linus Torvalds 已提交
6232 6233
	if (status)
		goto out;
6234
	status = decode_getfattr_label(xdr, res->fattr, res->label, res->server);
L
Linus Torvalds 已提交
6235 6236 6237 6238
out:
	return status;
}

6239 6240 6241
/*
 * Encode an SETACL request
 */
6242 6243
static void nfs4_xdr_enc_setacl(struct rpc_rqst *req, struct xdr_stream *xdr,
				struct nfs_setaclargs *args)
6244
{
A
Andy Adamson 已提交
6245
	struct compound_hdr hdr = {
6246
		.minorversion = nfs4_xdr_minorversion(&args->seq_args),
A
Andy Adamson 已提交
6247 6248
	};

6249 6250 6251 6252
	encode_compound_hdr(xdr, req, &hdr);
	encode_sequence(xdr, &args->seq_args, &hdr);
	encode_putfh(xdr, args->fh, &hdr);
	encode_setacl(xdr, args, &hdr);
6253
	encode_nops(&hdr);
6254
}
A
Andy Adamson 已提交
6255

6256 6257 6258 6259
/*
 * Decode SETACL response
 */
static int
6260
nfs4_xdr_dec_setacl(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
B
Benny Halevy 已提交
6261
		    struct nfs_setaclres *res)
6262 6263 6264 6265
{
	struct compound_hdr hdr;
	int status;

6266
	status = decode_compound_hdr(xdr, &hdr);
6267 6268
	if (status)
		goto out;
6269
	status = decode_sequence(xdr, &res->seq_res, rqstp);
6270 6271
	if (status)
		goto out;
6272
	status = decode_putfh(xdr);
6273 6274
	if (status)
		goto out;
6275
	status = decode_setattr(xdr);
6276 6277 6278
out:
	return status;
}
L
Linus Torvalds 已提交
6279

6280 6281 6282 6283
/*
 * Decode GETACL response
 */
static int
6284
nfs4_xdr_dec_getacl(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
B
Benny Halevy 已提交
6285
		    struct nfs_getaclres *res)
6286 6287 6288 6289
{
	struct compound_hdr hdr;
	int status;

6290 6291 6292 6293
	if (res->acl_scratch != NULL) {
		void *p = page_address(res->acl_scratch);
		xdr_set_scratch_buffer(xdr, p, PAGE_SIZE);
	}
6294
	status = decode_compound_hdr(xdr, &hdr);
6295 6296
	if (status)
		goto out;
6297
	status = decode_sequence(xdr, &res->seq_res, rqstp);
6298 6299
	if (status)
		goto out;
6300
	status = decode_putfh(xdr);
6301 6302
	if (status)
		goto out;
6303
	status = decode_getacl(xdr, rqstp, res);
6304 6305 6306 6307 6308

out:
	return status;
}

L
Linus Torvalds 已提交
6309 6310 6311
/*
 * Decode CLOSE response
 */
6312 6313
static int nfs4_xdr_dec_close(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
			      struct nfs_closeres *res)
L
Linus Torvalds 已提交
6314
{
A
Andy Adamson 已提交
6315 6316 6317
	struct compound_hdr hdr;
	int status;

6318
	status = decode_compound_hdr(xdr, &hdr);
6319 6320
	if (status)
		goto out;
6321
	status = decode_sequence(xdr, &res->seq_res, rqstp);
A
Andy Adamson 已提交
6322 6323
	if (status)
		goto out;
6324
	status = decode_putfh(xdr);
A
Andy Adamson 已提交
6325 6326
	if (status)
		goto out;
6327
	status = decode_close(xdr, res);
6328 6329 6330 6331 6332 6333 6334 6335
	if (status != 0)
		goto out;
	/*
	 * Note: Server may do delete on close for this file
	 * 	in which case the getattr call will fail with
	 * 	an ESTALE error. Shouldn't be a problem,
	 * 	though, since fattr->valid will remain unset.
	 */
6336
	decode_getfattr(xdr, res->fattr, res->server);
L
Linus Torvalds 已提交
6337
out:
A
Andy Adamson 已提交
6338
	return status;
L
Linus Torvalds 已提交
6339 6340 6341 6342 6343
}

/*
 * Decode OPEN response
 */
6344 6345
static int nfs4_xdr_dec_open(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
			     struct nfs_openres *res)
L
Linus Torvalds 已提交
6346
{
A
Andy Adamson 已提交
6347 6348 6349
	struct compound_hdr hdr;
	int status;

6350
	status = decode_compound_hdr(xdr, &hdr);
6351 6352
	if (status)
		goto out;
6353
	status = decode_sequence(xdr, &res->seq_res, rqstp);
A
Andy Adamson 已提交
6354 6355
	if (status)
		goto out;
6356
	status = decode_putfh(xdr);
A
Andy Adamson 已提交
6357 6358
	if (status)
		goto out;
6359
	status = decode_open(xdr, res);
6360 6361
	if (status)
		goto out;
6362 6363
	status = decode_getfh(xdr, &res->fh);
	if (status)
L
Linus Torvalds 已提交
6364
		goto out;
6365 6366
	if (res->access_request)
		decode_access(xdr, &res->access_supported, &res->access_result);
6367
	decode_getfattr_label(xdr, res->f_attr, res->f_label, res->server);
L
Linus Torvalds 已提交
6368
out:
A
Andy Adamson 已提交
6369
	return status;
L
Linus Torvalds 已提交
6370 6371 6372 6373 6374
}

/*
 * Decode OPEN_CONFIRM response
 */
6375 6376 6377
static int nfs4_xdr_dec_open_confirm(struct rpc_rqst *rqstp,
				     struct xdr_stream *xdr,
				     struct nfs_open_confirmres *res)
L
Linus Torvalds 已提交
6378
{
A
Andy Adamson 已提交
6379 6380 6381
	struct compound_hdr hdr;
	int status;

6382
	status = decode_compound_hdr(xdr, &hdr);
A
Andy Adamson 已提交
6383 6384
	if (status)
		goto out;
6385
	status = decode_putfh(xdr);
A
Andy Adamson 已提交
6386 6387
	if (status)
		goto out;
6388
	status = decode_open_confirm(xdr, res);
L
Linus Torvalds 已提交
6389
out:
A
Andy Adamson 已提交
6390
	return status;
L
Linus Torvalds 已提交
6391 6392 6393 6394 6395
}

/*
 * Decode OPEN response
 */
6396 6397 6398
static int nfs4_xdr_dec_open_noattr(struct rpc_rqst *rqstp,
				    struct xdr_stream *xdr,
				    struct nfs_openres *res)
L
Linus Torvalds 已提交
6399
{
A
Andy Adamson 已提交
6400 6401 6402
	struct compound_hdr hdr;
	int status;

6403
	status = decode_compound_hdr(xdr, &hdr);
6404 6405
	if (status)
		goto out;
6406
	status = decode_sequence(xdr, &res->seq_res, rqstp);
A
Andy Adamson 已提交
6407 6408
	if (status)
		goto out;
6409
	status = decode_putfh(xdr);
A
Andy Adamson 已提交
6410 6411
	if (status)
		goto out;
6412
	status = decode_open(xdr, res);
A
Andy Adamson 已提交
6413 6414
	if (status)
		goto out;
6415 6416
	if (res->access_request)
		decode_access(xdr, &res->access_supported, &res->access_result);
6417
	decode_getfattr(xdr, res->f_attr, res->server);
L
Linus Torvalds 已提交
6418
out:
A
Andy Adamson 已提交
6419
	return status;
L
Linus Torvalds 已提交
6420 6421 6422 6423 6424
}

/*
 * Decode SETATTR response
 */
6425 6426 6427
static int nfs4_xdr_dec_setattr(struct rpc_rqst *rqstp,
				struct xdr_stream *xdr,
				struct nfs_setattrres *res)
L
Linus Torvalds 已提交
6428
{
A
Andy Adamson 已提交
6429 6430 6431
	struct compound_hdr hdr;
	int status;

6432
	status = decode_compound_hdr(xdr, &hdr);
6433 6434
	if (status)
		goto out;
6435
	status = decode_sequence(xdr, &res->seq_res, rqstp);
A
Andy Adamson 已提交
6436 6437
	if (status)
		goto out;
6438
	status = decode_putfh(xdr);
A
Andy Adamson 已提交
6439 6440
	if (status)
		goto out;
6441
	status = decode_setattr(xdr);
A
Andy Adamson 已提交
6442 6443
	if (status)
		goto out;
6444
	decode_getfattr_label(xdr, res->fattr, res->label, res->server);
L
Linus Torvalds 已提交
6445
out:
A
Andy Adamson 已提交
6446
	return status;
L
Linus Torvalds 已提交
6447 6448 6449 6450 6451
}

/*
 * Decode LOCK response
 */
6452 6453
static int nfs4_xdr_dec_lock(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
			     struct nfs_lock_res *res)
L
Linus Torvalds 已提交
6454 6455 6456 6457
{
	struct compound_hdr hdr;
	int status;

6458
	status = decode_compound_hdr(xdr, &hdr);
6459 6460
	if (status)
		goto out;
6461
	status = decode_sequence(xdr, &res->seq_res, rqstp);
L
Linus Torvalds 已提交
6462 6463
	if (status)
		goto out;
6464
	status = decode_putfh(xdr);
L
Linus Torvalds 已提交
6465 6466
	if (status)
		goto out;
6467
	status = decode_lock(xdr, res);
L
Linus Torvalds 已提交
6468 6469 6470 6471 6472 6473 6474
out:
	return status;
}

/*
 * Decode LOCKT response
 */
6475 6476
static int nfs4_xdr_dec_lockt(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
			      struct nfs_lockt_res *res)
L
Linus Torvalds 已提交
6477 6478 6479 6480
{
	struct compound_hdr hdr;
	int status;

6481
	status = decode_compound_hdr(xdr, &hdr);
6482 6483
	if (status)
		goto out;
6484
	status = decode_sequence(xdr, &res->seq_res, rqstp);
L
Linus Torvalds 已提交
6485 6486
	if (status)
		goto out;
6487
	status = decode_putfh(xdr);
L
Linus Torvalds 已提交
6488 6489
	if (status)
		goto out;
6490
	status = decode_lockt(xdr, res);
L
Linus Torvalds 已提交
6491 6492 6493 6494 6495 6496 6497
out:
	return status;
}

/*
 * Decode LOCKU response
 */
6498 6499
static int nfs4_xdr_dec_locku(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
			      struct nfs_locku_res *res)
L
Linus Torvalds 已提交
6500 6501 6502 6503
{
	struct compound_hdr hdr;
	int status;

6504
	status = decode_compound_hdr(xdr, &hdr);
6505 6506
	if (status)
		goto out;
6507
	status = decode_sequence(xdr, &res->seq_res, rqstp);
L
Linus Torvalds 已提交
6508 6509
	if (status)
		goto out;
6510
	status = decode_putfh(xdr);
L
Linus Torvalds 已提交
6511 6512
	if (status)
		goto out;
6513
	status = decode_locku(xdr, res);
L
Linus Torvalds 已提交
6514 6515 6516 6517
out:
	return status;
}

6518 6519
static int nfs4_xdr_dec_release_lockowner(struct rpc_rqst *rqstp,
					  struct xdr_stream *xdr, void *dummy)
6520 6521 6522 6523
{
	struct compound_hdr hdr;
	int status;

6524
	status = decode_compound_hdr(xdr, &hdr);
6525
	if (!status)
6526
		status = decode_release_lockowner(xdr);
6527 6528 6529
	return status;
}

L
Linus Torvalds 已提交
6530 6531 6532
/*
 * Decode READLINK response
 */
6533 6534
static int nfs4_xdr_dec_readlink(struct rpc_rqst *rqstp,
				 struct xdr_stream *xdr,
B
Benny Halevy 已提交
6535
				 struct nfs4_readlink_res *res)
L
Linus Torvalds 已提交
6536 6537 6538 6539
{
	struct compound_hdr hdr;
	int status;

6540
	status = decode_compound_hdr(xdr, &hdr);
6541 6542
	if (status)
		goto out;
6543
	status = decode_sequence(xdr, &res->seq_res, rqstp);
L
Linus Torvalds 已提交
6544 6545
	if (status)
		goto out;
6546
	status = decode_putfh(xdr);
L
Linus Torvalds 已提交
6547 6548
	if (status)
		goto out;
6549
	status = decode_readlink(xdr, rqstp);
L
Linus Torvalds 已提交
6550 6551 6552 6553 6554 6555 6556
out:
	return status;
}

/*
 * Decode READDIR response
 */
6557 6558
static int nfs4_xdr_dec_readdir(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
				struct nfs4_readdir_res *res)
L
Linus Torvalds 已提交
6559 6560 6561 6562
{
	struct compound_hdr hdr;
	int status;

6563
	status = decode_compound_hdr(xdr, &hdr);
6564 6565
	if (status)
		goto out;
6566
	status = decode_sequence(xdr, &res->seq_res, rqstp);
L
Linus Torvalds 已提交
6567 6568
	if (status)
		goto out;
6569
	status = decode_putfh(xdr);
L
Linus Torvalds 已提交
6570 6571
	if (status)
		goto out;
6572
	status = decode_readdir(xdr, rqstp, res);
L
Linus Torvalds 已提交
6573 6574 6575 6576 6577 6578 6579
out:
	return status;
}

/*
 * Decode Read response
 */
6580 6581
static int nfs4_xdr_dec_read(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
			     struct nfs_readres *res)
L
Linus Torvalds 已提交
6582 6583 6584 6585
{
	struct compound_hdr hdr;
	int status;

6586
	status = decode_compound_hdr(xdr, &hdr);
6587 6588
	if (status)
		goto out;
6589
	status = decode_sequence(xdr, &res->seq_res, rqstp);
L
Linus Torvalds 已提交
6590 6591
	if (status)
		goto out;
6592
	status = decode_putfh(xdr);
L
Linus Torvalds 已提交
6593 6594
	if (status)
		goto out;
6595
	status = decode_read(xdr, rqstp, res);
L
Linus Torvalds 已提交
6596 6597 6598 6599 6600 6601 6602 6603 6604
	if (!status)
		status = res->count;
out:
	return status;
}

/*
 * Decode WRITE response
 */
6605 6606
static int nfs4_xdr_dec_write(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
			      struct nfs_writeres *res)
L
Linus Torvalds 已提交
6607 6608 6609 6610
{
	struct compound_hdr hdr;
	int status;

6611
	status = decode_compound_hdr(xdr, &hdr);
6612 6613
	if (status)
		goto out;
6614
	status = decode_sequence(xdr, &res->seq_res, rqstp);
L
Linus Torvalds 已提交
6615 6616
	if (status)
		goto out;
6617
	status = decode_putfh(xdr);
L
Linus Torvalds 已提交
6618 6619
	if (status)
		goto out;
6620
	status = decode_write(xdr, res);
6621 6622
	if (status)
		goto out;
6623
	if (res->fattr)
6624
		decode_getfattr(xdr, res->fattr, res->server);
L
Linus Torvalds 已提交
6625 6626 6627 6628 6629 6630 6631 6632 6633
	if (!status)
		status = res->count;
out:
	return status;
}

/*
 * Decode COMMIT response
 */
6634
static int nfs4_xdr_dec_commit(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6635
			       struct nfs_commitres *res)
L
Linus Torvalds 已提交
6636 6637 6638 6639
{
	struct compound_hdr hdr;
	int status;

6640
	status = decode_compound_hdr(xdr, &hdr);
6641 6642
	if (status)
		goto out;
6643
	status = decode_sequence(xdr, &res->seq_res, rqstp);
L
Linus Torvalds 已提交
6644 6645
	if (status)
		goto out;
6646
	status = decode_putfh(xdr);
L
Linus Torvalds 已提交
6647 6648
	if (status)
		goto out;
6649
	status = decode_commit(xdr, res);
L
Linus Torvalds 已提交
6650 6651 6652 6653 6654
out:
	return status;
}

/*
6655
 * Decode FSINFO response
L
Linus Torvalds 已提交
6656
 */
6657
static int nfs4_xdr_dec_fsinfo(struct rpc_rqst *req, struct xdr_stream *xdr,
B
Benny Halevy 已提交
6658
			       struct nfs4_fsinfo_res *res)
L
Linus Torvalds 已提交
6659 6660 6661 6662
{
	struct compound_hdr hdr;
	int status;

6663
	status = decode_compound_hdr(xdr, &hdr);
6664
	if (!status)
6665
		status = decode_sequence(xdr, &res->seq_res, req);
L
Linus Torvalds 已提交
6666
	if (!status)
6667
		status = decode_putfh(xdr);
L
Linus Torvalds 已提交
6668
	if (!status)
6669
		status = decode_fsinfo(xdr, res->fsinfo);
L
Linus Torvalds 已提交
6670 6671 6672 6673
	return status;
}

/*
6674
 * Decode PATHCONF response
L
Linus Torvalds 已提交
6675
 */
6676
static int nfs4_xdr_dec_pathconf(struct rpc_rqst *req, struct xdr_stream *xdr,
B
Benny Halevy 已提交
6677
				 struct nfs4_pathconf_res *res)
L
Linus Torvalds 已提交
6678 6679 6680 6681
{
	struct compound_hdr hdr;
	int status;

6682
	status = decode_compound_hdr(xdr, &hdr);
6683
	if (!status)
6684
		status = decode_sequence(xdr, &res->seq_res, req);
L
Linus Torvalds 已提交
6685
	if (!status)
6686
		status = decode_putfh(xdr);
L
Linus Torvalds 已提交
6687
	if (!status)
6688
		status = decode_pathconf(xdr, res->pathconf);
L
Linus Torvalds 已提交
6689 6690 6691 6692
	return status;
}

/*
6693
 * Decode STATFS response
L
Linus Torvalds 已提交
6694
 */
6695
static int nfs4_xdr_dec_statfs(struct rpc_rqst *req, struct xdr_stream *xdr,
B
Benny Halevy 已提交
6696
			       struct nfs4_statfs_res *res)
L
Linus Torvalds 已提交
6697 6698 6699 6700
{
	struct compound_hdr hdr;
	int status;

6701
	status = decode_compound_hdr(xdr, &hdr);
6702
	if (!status)
6703
		status = decode_sequence(xdr, &res->seq_res, req);
L
Linus Torvalds 已提交
6704
	if (!status)
6705
		status = decode_putfh(xdr);
L
Linus Torvalds 已提交
6706
	if (!status)
6707
		status = decode_statfs(xdr, res->fsstat);
L
Linus Torvalds 已提交
6708 6709 6710 6711
	return status;
}

/*
6712
 * Decode GETATTR_BITMAP response
L
Linus Torvalds 已提交
6713
 */
6714 6715 6716
static int nfs4_xdr_dec_server_caps(struct rpc_rqst *req,
				    struct xdr_stream *xdr,
				    struct nfs4_server_caps_res *res)
L
Linus Torvalds 已提交
6717 6718 6719 6720
{
	struct compound_hdr hdr;
	int status;

6721
	status = decode_compound_hdr(xdr, &hdr);
6722 6723
	if (status)
		goto out;
6724
	status = decode_sequence(xdr, &res->seq_res, req);
6725
	if (status)
L
Linus Torvalds 已提交
6726
		goto out;
6727 6728
	status = decode_putfh(xdr);
	if (status)
L
Linus Torvalds 已提交
6729
		goto out;
6730
	status = decode_server_caps(xdr, res);
L
Linus Torvalds 已提交
6731 6732 6733 6734 6735 6736 6737
out:
	return status;
}

/*
 * Decode RENEW response
 */
6738 6739
static int nfs4_xdr_dec_renew(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
			      void *__unused)
L
Linus Torvalds 已提交
6740 6741 6742 6743
{
	struct compound_hdr hdr;
	int status;

6744
	status = decode_compound_hdr(xdr, &hdr);
L
Linus Torvalds 已提交
6745
	if (!status)
6746
		status = decode_renew(xdr);
L
Linus Torvalds 已提交
6747 6748 6749 6750
	return status;
}

/*
6751
 * Decode SETCLIENTID response
L
Linus Torvalds 已提交
6752
 */
6753 6754 6755
static int nfs4_xdr_dec_setclientid(struct rpc_rqst *req,
				    struct xdr_stream *xdr,
				    struct nfs4_setclientid_res *res)
L
Linus Torvalds 已提交
6756 6757 6758 6759
{
	struct compound_hdr hdr;
	int status;

6760
	status = decode_compound_hdr(xdr, &hdr);
L
Linus Torvalds 已提交
6761
	if (!status)
6762
		status = decode_setclientid(xdr, res);
L
Linus Torvalds 已提交
6763 6764 6765 6766
	return status;
}

/*
6767
 * Decode SETCLIENTID_CONFIRM response
L
Linus Torvalds 已提交
6768
 */
6769
static int nfs4_xdr_dec_setclientid_confirm(struct rpc_rqst *req,
6770
					    struct xdr_stream *xdr)
L
Linus Torvalds 已提交
6771 6772 6773 6774
{
	struct compound_hdr hdr;
	int status;

6775
	status = decode_compound_hdr(xdr, &hdr);
L
Linus Torvalds 已提交
6776
	if (!status)
6777
		status = decode_setclientid_confirm(xdr);
L
Linus Torvalds 已提交
6778 6779 6780 6781
	return status;
}

/*
6782
 * Decode DELEGRETURN response
L
Linus Torvalds 已提交
6783
 */
6784 6785 6786
static int nfs4_xdr_dec_delegreturn(struct rpc_rqst *rqstp,
				    struct xdr_stream *xdr,
				    struct nfs4_delegreturnres *res)
L
Linus Torvalds 已提交
6787 6788 6789 6790
{
	struct compound_hdr hdr;
	int status;

6791
	status = decode_compound_hdr(xdr, &hdr);
6792 6793
	if (status)
		goto out;
6794
	status = decode_sequence(xdr, &res->seq_res, rqstp);
6795
	if (status)
6796
		goto out;
6797
	status = decode_putfh(xdr);
6798 6799
	if (status != 0)
		goto out;
6800
	status = decode_getfattr(xdr, res->fattr, res->server);
6801 6802
	if (status != 0)
		goto out;
6803
	status = decode_delegreturn(xdr);
6804
out:
L
Linus Torvalds 已提交
6805 6806 6807
	return status;
}

6808
/*
6809
 * Decode FS_LOCATIONS response
6810
 */
6811 6812
static int nfs4_xdr_dec_fs_locations(struct rpc_rqst *req,
				     struct xdr_stream *xdr,
B
Benny Halevy 已提交
6813
				     struct nfs4_fs_locations_res *res)
6814 6815 6816 6817
{
	struct compound_hdr hdr;
	int status;

6818
	status = decode_compound_hdr(xdr, &hdr);
6819 6820
	if (status)
		goto out;
6821
	status = decode_sequence(xdr, &res->seq_res, req);
6822
	if (status)
6823
		goto out;
6824 6825
	status = decode_putfh(xdr);
	if (status)
6826
		goto out;
6827 6828
	status = decode_lookup(xdr);
	if (status)
6829
		goto out;
6830
	xdr_enter_page(xdr, PAGE_SIZE);
6831 6832
	status = decode_getfattr_generic(xdr, &res->fs_locations->fattr,
					 NULL, res->fs_locations,
6833
					 NULL, res->fs_locations->server);
6834 6835 6836 6837
out:
	return status;
}

B
Bryan Schumaker 已提交
6838 6839 6840 6841 6842 6843 6844 6845 6846 6847 6848 6849 6850 6851 6852 6853 6854 6855 6856 6857 6858 6859 6860 6861
/*
 * Decode SECINFO response
 */
static int nfs4_xdr_dec_secinfo(struct rpc_rqst *rqstp,
				struct xdr_stream *xdr,
				struct nfs4_secinfo_res *res)
{
	struct compound_hdr hdr;
	int status;

	status = decode_compound_hdr(xdr, &hdr);
	if (status)
		goto out;
	status = decode_sequence(xdr, &res->seq_res, rqstp);
	if (status)
		goto out;
	status = decode_putfh(xdr);
	if (status)
		goto out;
	status = decode_secinfo(xdr, res);
out:
	return status;
}

B
Benny Halevy 已提交
6862
#if defined(CONFIG_NFS_V4_1)
6863 6864 6865 6866 6867 6868 6869 6870 6871 6872 6873 6874 6875 6876 6877 6878
/*
 * Decode BIND_CONN_TO_SESSION response
 */
static int nfs4_xdr_dec_bind_conn_to_session(struct rpc_rqst *rqstp,
					struct xdr_stream *xdr,
					void *res)
{
	struct compound_hdr hdr;
	int status;

	status = decode_compound_hdr(xdr, &hdr);
	if (!status)
		status = decode_bind_conn_to_session(xdr, res);
	return status;
}

B
Benny Halevy 已提交
6879
/*
6880
 * Decode EXCHANGE_ID response
B
Benny Halevy 已提交
6881
 */
6882 6883
static int nfs4_xdr_dec_exchange_id(struct rpc_rqst *rqstp,
				    struct xdr_stream *xdr,
B
Benny Halevy 已提交
6884 6885 6886 6887 6888
				    void *res)
{
	struct compound_hdr hdr;
	int status;

6889
	status = decode_compound_hdr(xdr, &hdr);
B
Benny Halevy 已提交
6890
	if (!status)
6891
		status = decode_exchange_id(xdr, res);
B
Benny Halevy 已提交
6892 6893
	return status;
}
A
Andy Adamson 已提交
6894

A
Andy Adamson 已提交
6895
/*
6896
 * Decode CREATE_SESSION response
A
Andy Adamson 已提交
6897
 */
6898 6899
static int nfs4_xdr_dec_create_session(struct rpc_rqst *rqstp,
				       struct xdr_stream *xdr,
A
Andy Adamson 已提交
6900 6901 6902 6903 6904
				       struct nfs41_create_session_res *res)
{
	struct compound_hdr hdr;
	int status;

6905
	status = decode_compound_hdr(xdr, &hdr);
A
Andy Adamson 已提交
6906
	if (!status)
6907
		status = decode_create_session(xdr, res);
A
Andy Adamson 已提交
6908 6909 6910
	return status;
}

A
Andy Adamson 已提交
6911
/*
6912
 * Decode DESTROY_SESSION response
A
Andy Adamson 已提交
6913
 */
6914 6915 6916
static int nfs4_xdr_dec_destroy_session(struct rpc_rqst *rqstp,
					struct xdr_stream *xdr,
					void *res)
A
Andy Adamson 已提交
6917 6918 6919 6920
{
	struct compound_hdr hdr;
	int status;

6921
	status = decode_compound_hdr(xdr, &hdr);
A
Andy Adamson 已提交
6922
	if (!status)
6923
		status = decode_destroy_session(xdr, res);
A
Andy Adamson 已提交
6924 6925 6926
	return status;
}

T
Trond Myklebust 已提交
6927 6928 6929 6930 6931 6932 6933 6934 6935 6936 6937 6938 6939 6940 6941 6942
/*
 * Decode DESTROY_CLIENTID response
 */
static int nfs4_xdr_dec_destroy_clientid(struct rpc_rqst *rqstp,
					struct xdr_stream *xdr,
					void *res)
{
	struct compound_hdr hdr;
	int status;

	status = decode_compound_hdr(xdr, &hdr);
	if (!status)
		status = decode_destroy_clientid(xdr, res);
	return status;
}

A
Andy Adamson 已提交
6943
/*
6944
 * Decode SEQUENCE response
A
Andy Adamson 已提交
6945
 */
6946 6947
static int nfs4_xdr_dec_sequence(struct rpc_rqst *rqstp,
				 struct xdr_stream *xdr,
A
Andy Adamson 已提交
6948 6949 6950 6951 6952
				 struct nfs4_sequence_res *res)
{
	struct compound_hdr hdr;
	int status;

6953
	status = decode_compound_hdr(xdr, &hdr);
A
Andy Adamson 已提交
6954
	if (!status)
6955
		status = decode_sequence(xdr, res, rqstp);
A
Andy Adamson 已提交
6956 6957 6958
	return status;
}

A
Andy Adamson 已提交
6959
/*
6960
 * Decode GET_LEASE_TIME response
A
Andy Adamson 已提交
6961
 */
6962 6963
static int nfs4_xdr_dec_get_lease_time(struct rpc_rqst *rqstp,
				       struct xdr_stream *xdr,
A
Andy Adamson 已提交
6964 6965 6966 6967 6968
				       struct nfs4_get_lease_time_res *res)
{
	struct compound_hdr hdr;
	int status;

6969
	status = decode_compound_hdr(xdr, &hdr);
A
Andy Adamson 已提交
6970
	if (!status)
6971
		status = decode_sequence(xdr, &res->lr_seq_res, rqstp);
A
Andy Adamson 已提交
6972
	if (!status)
6973
		status = decode_putrootfh(xdr);
A
Andy Adamson 已提交
6974
	if (!status)
6975
		status = decode_fsinfo(xdr, res->lr_fsinfo);
A
Andy Adamson 已提交
6976 6977
	return status;
}
6978 6979 6980 6981

/*
 * Decode RECLAIM_COMPLETE response
 */
6982 6983
static int nfs4_xdr_dec_reclaim_complete(struct rpc_rqst *rqstp,
					 struct xdr_stream *xdr,
6984 6985 6986 6987 6988
					 struct nfs41_reclaim_complete_res *res)
{
	struct compound_hdr hdr;
	int status;

6989
	status = decode_compound_hdr(xdr, &hdr);
6990
	if (!status)
6991
		status = decode_sequence(xdr, &res->seq_res, rqstp);
6992
	if (!status)
6993
		status = decode_reclaim_complete(xdr, (void *)NULL);
6994 6995
	return status;
}
6996

A
Andy Adamson 已提交
6997 6998 6999 7000 7001 7002 7003 7004 7005 7006 7007 7008 7009 7010 7011 7012 7013 7014 7015 7016 7017 7018 7019 7020 7021 7022
/*
 * Decode GETDEVICELIST response
 */
static int nfs4_xdr_dec_getdevicelist(struct rpc_rqst *rqstp,
				      struct xdr_stream *xdr,
				      struct nfs4_getdevicelist_res *res)
{
	struct compound_hdr hdr;
	int status;

	dprintk("encoding getdevicelist!\n");

	status = decode_compound_hdr(xdr, &hdr);
	if (status != 0)
		goto out;
	status = decode_sequence(xdr, &res->seq_res, rqstp);
	if (status != 0)
		goto out;
	status = decode_putfh(xdr);
	if (status != 0)
		goto out;
	status = decode_getdevicelist(xdr, res->devlist);
out:
	return status;
}

7023 7024 7025
/*
 * Decode GETDEVINFO response
 */
7026 7027
static int nfs4_xdr_dec_getdeviceinfo(struct rpc_rqst *rqstp,
				      struct xdr_stream *xdr,
7028 7029 7030 7031 7032
				      struct nfs4_getdeviceinfo_res *res)
{
	struct compound_hdr hdr;
	int status;

7033
	status = decode_compound_hdr(xdr, &hdr);
7034 7035
	if (status != 0)
		goto out;
7036
	status = decode_sequence(xdr, &res->seq_res, rqstp);
7037 7038
	if (status != 0)
		goto out;
7039
	status = decode_getdeviceinfo(xdr, res->pdev);
7040 7041 7042 7043 7044 7045 7046
out:
	return status;
}

/*
 * Decode LAYOUTGET response
 */
7047 7048
static int nfs4_xdr_dec_layoutget(struct rpc_rqst *rqstp,
				  struct xdr_stream *xdr,
7049 7050 7051 7052 7053
				  struct nfs4_layoutget_res *res)
{
	struct compound_hdr hdr;
	int status;

7054
	status = decode_compound_hdr(xdr, &hdr);
7055 7056
	if (status)
		goto out;
7057
	status = decode_sequence(xdr, &res->seq_res, rqstp);
7058 7059
	if (status)
		goto out;
7060
	status = decode_putfh(xdr);
7061 7062
	if (status)
		goto out;
7063
	status = decode_layoutget(xdr, rqstp, res);
7064 7065 7066
out:
	return status;
}
A
Andy Adamson 已提交
7067

B
Benny Halevy 已提交
7068 7069 7070 7071 7072 7073 7074 7075 7076 7077 7078 7079 7080 7081 7082 7083 7084 7085 7086 7087 7088 7089 7090 7091
/*
 * Decode LAYOUTRETURN response
 */
static int nfs4_xdr_dec_layoutreturn(struct rpc_rqst *rqstp,
				     struct xdr_stream *xdr,
				     struct nfs4_layoutreturn_res *res)
{
	struct compound_hdr hdr;
	int status;

	status = decode_compound_hdr(xdr, &hdr);
	if (status)
		goto out;
	status = decode_sequence(xdr, &res->seq_res, rqstp);
	if (status)
		goto out;
	status = decode_putfh(xdr);
	if (status)
		goto out;
	status = decode_layoutreturn(xdr, res);
out:
	return status;
}

A
Andy Adamson 已提交
7092 7093 7094 7095 7096 7097 7098 7099 7100 7101 7102 7103 7104 7105 7106 7107 7108 7109 7110 7111 7112 7113
/*
 * Decode LAYOUTCOMMIT response
 */
static int nfs4_xdr_dec_layoutcommit(struct rpc_rqst *rqstp,
				     struct xdr_stream *xdr,
				     struct nfs4_layoutcommit_res *res)
{
	struct compound_hdr hdr;
	int status;

	status = decode_compound_hdr(xdr, &hdr);
	if (status)
		goto out;
	status = decode_sequence(xdr, &res->seq_res, rqstp);
	if (status)
		goto out;
	status = decode_putfh(xdr);
	if (status)
		goto out;
	status = decode_layoutcommit(xdr, rqstp, res);
	if (status)
		goto out;
7114
	decode_getfattr(xdr, res->fattr, res->server);
A
Andy Adamson 已提交
7115 7116 7117
out:
	return status;
}
7118 7119 7120 7121 7122 7123 7124 7125 7126 7127 7128 7129 7130 7131 7132 7133 7134 7135 7136 7137

/*
 * Decode SECINFO_NO_NAME response
 */
static int nfs4_xdr_dec_secinfo_no_name(struct rpc_rqst *rqstp,
					struct xdr_stream *xdr,
					struct nfs4_secinfo_res *res)
{
	struct compound_hdr hdr;
	int status;

	status = decode_compound_hdr(xdr, &hdr);
	if (status)
		goto out;
	status = decode_sequence(xdr, &res->seq_res, rqstp);
	if (status)
		goto out;
	status = decode_putrootfh(xdr);
	if (status)
		goto out;
B
Bryan Schumaker 已提交
7138
	status = decode_secinfo_no_name(xdr, res);
7139 7140 7141
out:
	return status;
}
B
Bryan Schumaker 已提交
7142 7143 7144 7145 7146 7147 7148 7149 7150 7151 7152 7153 7154 7155 7156 7157 7158 7159 7160 7161 7162

/*
 * Decode TEST_STATEID response
 */
static int nfs4_xdr_dec_test_stateid(struct rpc_rqst *rqstp,
				     struct xdr_stream *xdr,
				     struct nfs41_test_stateid_res *res)
{
	struct compound_hdr hdr;
	int status;

	status = decode_compound_hdr(xdr, &hdr);
	if (status)
		goto out;
	status = decode_sequence(xdr, &res->seq_res, rqstp);
	if (status)
		goto out;
	status = decode_test_stateid(xdr, res);
out:
	return status;
}
B
Bryan Schumaker 已提交
7163 7164 7165 7166 7167 7168 7169 7170 7171 7172 7173 7174 7175 7176 7177 7178 7179 7180 7181 7182 7183

/*
 * Decode FREE_STATEID response
 */
static int nfs4_xdr_dec_free_stateid(struct rpc_rqst *rqstp,
				     struct xdr_stream *xdr,
				     struct nfs41_free_stateid_res *res)
{
	struct compound_hdr hdr;
	int status;

	status = decode_compound_hdr(xdr, &hdr);
	if (status)
		goto out;
	status = decode_sequence(xdr, &res->seq_res, rqstp);
	if (status)
		goto out;
	status = decode_free_stateid(xdr, res);
out:
	return status;
}
B
Benny Halevy 已提交
7184 7185
#endif /* CONFIG_NFS_V4_1 */

7186 7187 7188 7189 7190 7191 7192 7193 7194 7195 7196 7197 7198 7199 7200 7201
/**
 * nfs4_decode_dirent - Decode a single NFSv4 directory entry stored in
 *                      the local page cache.
 * @xdr: XDR stream where entry resides
 * @entry: buffer to fill in with entry data
 * @plus: boolean indicating whether this should be a readdirplus entry
 *
 * Returns zero if successful, otherwise a negative errno value is
 * returned.
 *
 * This function is not invoked during READDIR reply decoding, but
 * rather whenever an application invokes the getdents(2) system call
 * on a directory already in our cache.
 */
int nfs4_decode_dirent(struct xdr_stream *xdr, struct nfs_entry *entry,
		       int plus)
L
Linus Torvalds 已提交
7202
{
7203
	unsigned int savep;
7204
	uint32_t bitmap[3] = {0};
L
Linus Torvalds 已提交
7205
	uint32_t len;
7206 7207 7208
	__be32 *p = xdr_inline_decode(xdr, 4);
	if (unlikely(!p))
		goto out_overflow;
7209
	if (*p == xdr_zero) {
7210 7211 7212
		p = xdr_inline_decode(xdr, 4);
		if (unlikely(!p))
			goto out_overflow;
7213
		if (*p == xdr_zero)
7214
			return -EAGAIN;
L
Linus Torvalds 已提交
7215
		entry->eof = 1;
7216
		return -EBADCOOKIE;
L
Linus Torvalds 已提交
7217 7218
	}

7219 7220 7221
	p = xdr_inline_decode(xdr, 12);
	if (unlikely(!p))
		goto out_overflow;
L
Linus Torvalds 已提交
7222 7223
	entry->prev_cookie = entry->cookie;
	p = xdr_decode_hyper(p, &entry->cookie);
7224
	entry->len = be32_to_cpup(p);
7225

7226
	p = xdr_inline_decode(xdr, entry->len);
7227 7228
	if (unlikely(!p))
		goto out_overflow;
L
Linus Torvalds 已提交
7229 7230 7231 7232 7233 7234 7235 7236
	entry->name = (const char *) p;

	/*
	 * In case the server doesn't return an inode number,
	 * we fake one here.  (We don't use inode number 0,
	 * since glibc seems to choke on it...)
	 */
	entry->ino = 1;
7237
	entry->fattr->valid = 0;
L
Linus Torvalds 已提交
7238

7239 7240 7241
	if (decode_attr_bitmap(xdr, bitmap) < 0)
		goto out_overflow;

7242
	if (decode_attr_length(xdr, &len, &savep) < 0)
7243 7244
		goto out_overflow;

7245
	if (decode_getfattr_attrs(xdr, bitmap, entry->fattr, entry->fh,
7246
			NULL, entry->label, entry->server) < 0)
7247
		goto out_overflow;
7248 7249 7250
	if (entry->fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID)
		entry->ino = entry->fattr->mounted_on_fileid;
	else if (entry->fattr->valid & NFS_ATTR_FATTR_FILEID)
7251 7252
		entry->ino = entry->fattr->fileid;

7253 7254 7255 7256
	entry->d_type = DT_UNKNOWN;
	if (entry->fattr->valid & NFS_ATTR_FATTR_TYPE)
		entry->d_type = nfs_umode_to_dtype(entry->fattr->mode);

7257
	return 0;
7258 7259 7260

out_overflow:
	print_overflow_msg(__func__, xdr);
7261
	return -EAGAIN;
L
Linus Torvalds 已提交
7262 7263 7264 7265 7266 7267 7268 7269 7270 7271 7272
}

/*
 * We need to translate between nfs status return values and
 * the local errno values which may not be the same.
 */
static struct {
	int stat;
	int errno;
} nfs_errtbl[] = {
	{ NFS4_OK,		0		},
7273 7274 7275 7276 7277 7278 7279 7280 7281 7282 7283 7284 7285 7286 7287 7288 7289 7290 7291 7292 7293 7294
	{ NFS4ERR_PERM,		-EPERM		},
	{ NFS4ERR_NOENT,	-ENOENT		},
	{ NFS4ERR_IO,		-errno_NFSERR_IO},
	{ NFS4ERR_NXIO,		-ENXIO		},
	{ NFS4ERR_ACCESS,	-EACCES		},
	{ NFS4ERR_EXIST,	-EEXIST		},
	{ NFS4ERR_XDEV,		-EXDEV		},
	{ NFS4ERR_NOTDIR,	-ENOTDIR	},
	{ NFS4ERR_ISDIR,	-EISDIR		},
	{ NFS4ERR_INVAL,	-EINVAL		},
	{ NFS4ERR_FBIG,		-EFBIG		},
	{ NFS4ERR_NOSPC,	-ENOSPC		},
	{ NFS4ERR_ROFS,		-EROFS		},
	{ NFS4ERR_MLINK,	-EMLINK		},
	{ NFS4ERR_NAMETOOLONG,	-ENAMETOOLONG	},
	{ NFS4ERR_NOTEMPTY,	-ENOTEMPTY	},
	{ NFS4ERR_DQUOT,	-EDQUOT		},
	{ NFS4ERR_STALE,	-ESTALE		},
	{ NFS4ERR_BADHANDLE,	-EBADHANDLE	},
	{ NFS4ERR_BAD_COOKIE,	-EBADCOOKIE	},
	{ NFS4ERR_NOTSUPP,	-ENOTSUPP	},
	{ NFS4ERR_TOOSMALL,	-ETOOSMALL	},
7295
	{ NFS4ERR_SERVERFAULT,	-EREMOTEIO	},
7296 7297 7298 7299 7300 7301
	{ NFS4ERR_BADTYPE,	-EBADTYPE	},
	{ NFS4ERR_LOCKED,	-EAGAIN		},
	{ NFS4ERR_SYMLINK,	-ELOOP		},
	{ NFS4ERR_OP_ILLEGAL,	-EOPNOTSUPP	},
	{ NFS4ERR_DEADLOCK,	-EDEADLK	},
	{ -1,			-EIO		}
L
Linus Torvalds 已提交
7302 7303 7304 7305 7306 7307 7308
};

/*
 * Convert an NFS error code to a local one.
 * This one is used jointly by NFSv2 and NFSv3.
 */
static int
7309
nfs4_stat_to_errno(int stat)
L
Linus Torvalds 已提交
7310 7311 7312 7313 7314 7315 7316 7317
{
	int i;
	for (i = 0; nfs_errtbl[i].stat != -1; i++) {
		if (nfs_errtbl[i].stat == stat)
			return nfs_errtbl[i].errno;
	}
	if (stat <= 10000 || stat > 10100) {
		/* The server is looney tunes. */
7318
		return -EREMOTEIO;
L
Linus Torvalds 已提交
7319 7320 7321 7322 7323 7324
	}
	/* If we cannot translate the error, the recovery routines should
	 * handle it.
	 * Note: remaining NFSv4 error codes have values > 10000, so should
	 * not conflict with native Linux error codes.
	 */
7325
	return -stat;
L
Linus Torvalds 已提交
7326 7327 7328 7329 7330
}

#define PROC(proc, argtype, restype)				\
[NFSPROC4_CLNT_##proc] = {					\
	.p_proc   = NFSPROC4_COMPOUND,				\
7331
	.p_encode = (kxdreproc_t)nfs4_xdr_##argtype,		\
7332
	.p_decode = (kxdrdproc_t)nfs4_xdr_##restype,		\
7333 7334
	.p_arglen = NFS4_##argtype##_sz,			\
	.p_replen = NFS4_##restype##_sz,			\
7335 7336
	.p_statidx = NFSPROC4_CLNT_##proc,			\
	.p_name   = #proc,					\
A
Andy Adamson 已提交
7337
}
L
Linus Torvalds 已提交
7338 7339

struct rpc_procinfo	nfs4_procedures[] = {
7340 7341 7342 7343 7344 7345 7346 7347 7348 7349 7350 7351 7352 7353 7354 7355 7356 7357 7358 7359 7360 7361 7362 7363 7364 7365 7366 7367 7368 7369 7370 7371 7372 7373 7374
	PROC(READ,		enc_read,		dec_read),
	PROC(WRITE,		enc_write,		dec_write),
	PROC(COMMIT,		enc_commit,		dec_commit),
	PROC(OPEN,		enc_open,		dec_open),
	PROC(OPEN_CONFIRM,	enc_open_confirm,	dec_open_confirm),
	PROC(OPEN_NOATTR,	enc_open_noattr,	dec_open_noattr),
	PROC(OPEN_DOWNGRADE,	enc_open_downgrade,	dec_open_downgrade),
	PROC(CLOSE,		enc_close,		dec_close),
	PROC(SETATTR,		enc_setattr,		dec_setattr),
	PROC(FSINFO,		enc_fsinfo,		dec_fsinfo),
	PROC(RENEW,		enc_renew,		dec_renew),
	PROC(SETCLIENTID,	enc_setclientid,	dec_setclientid),
	PROC(SETCLIENTID_CONFIRM, enc_setclientid_confirm, dec_setclientid_confirm),
	PROC(LOCK,		enc_lock,		dec_lock),
	PROC(LOCKT,		enc_lockt,		dec_lockt),
	PROC(LOCKU,		enc_locku,		dec_locku),
	PROC(ACCESS,		enc_access,		dec_access),
	PROC(GETATTR,		enc_getattr,		dec_getattr),
	PROC(LOOKUP,		enc_lookup,		dec_lookup),
	PROC(LOOKUP_ROOT,	enc_lookup_root,	dec_lookup_root),
	PROC(REMOVE,		enc_remove,		dec_remove),
	PROC(RENAME,		enc_rename,		dec_rename),
	PROC(LINK,		enc_link,		dec_link),
	PROC(SYMLINK,		enc_symlink,		dec_symlink),
	PROC(CREATE,		enc_create,		dec_create),
	PROC(PATHCONF,		enc_pathconf,		dec_pathconf),
	PROC(STATFS,		enc_statfs,		dec_statfs),
	PROC(READLINK,		enc_readlink,		dec_readlink),
	PROC(READDIR,		enc_readdir,		dec_readdir),
	PROC(SERVER_CAPS,	enc_server_caps,	dec_server_caps),
	PROC(DELEGRETURN,	enc_delegreturn,	dec_delegreturn),
	PROC(GETACL,		enc_getacl,		dec_getacl),
	PROC(SETACL,		enc_setacl,		dec_setacl),
	PROC(FS_LOCATIONS,	enc_fs_locations,	dec_fs_locations),
	PROC(RELEASE_LOCKOWNER,	enc_release_lockowner,	dec_release_lockowner),
B
Bryan Schumaker 已提交
7375
	PROC(SECINFO,		enc_secinfo,		dec_secinfo),
B
Benny Halevy 已提交
7376
#if defined(CONFIG_NFS_V4_1)
7377 7378 7379 7380 7381 7382 7383 7384
	PROC(EXCHANGE_ID,	enc_exchange_id,	dec_exchange_id),
	PROC(CREATE_SESSION,	enc_create_session,	dec_create_session),
	PROC(DESTROY_SESSION,	enc_destroy_session,	dec_destroy_session),
	PROC(SEQUENCE,		enc_sequence,		dec_sequence),
	PROC(GET_LEASE_TIME,	enc_get_lease_time,	dec_get_lease_time),
	PROC(RECLAIM_COMPLETE,	enc_reclaim_complete,	dec_reclaim_complete),
	PROC(GETDEVICEINFO,	enc_getdeviceinfo,	dec_getdeviceinfo),
	PROC(LAYOUTGET,		enc_layoutget,		dec_layoutget),
A
Andy Adamson 已提交
7385
	PROC(LAYOUTCOMMIT,	enc_layoutcommit,	dec_layoutcommit),
B
Benny Halevy 已提交
7386
	PROC(LAYOUTRETURN,	enc_layoutreturn,	dec_layoutreturn),
7387
	PROC(SECINFO_NO_NAME,	enc_secinfo_no_name,	dec_secinfo_no_name),
B
Bryan Schumaker 已提交
7388
	PROC(TEST_STATEID,	enc_test_stateid,	dec_test_stateid),
B
Bryan Schumaker 已提交
7389
	PROC(FREE_STATEID,	enc_free_stateid,	dec_free_stateid),
A
Andy Adamson 已提交
7390
	PROC(GETDEVICELIST,	enc_getdevicelist,	dec_getdevicelist),
7391 7392
	PROC(BIND_CONN_TO_SESSION,
			enc_bind_conn_to_session, dec_bind_conn_to_session),
T
Trond Myklebust 已提交
7393
	PROC(DESTROY_CLIENTID,	enc_destroy_clientid,	dec_destroy_clientid),
B
Benny Halevy 已提交
7394
#endif /* CONFIG_NFS_V4_1 */
L
Linus Torvalds 已提交
7395 7396
};

7397
const struct rpc_version nfs_version4 = {
L
Linus Torvalds 已提交
7398
	.number			= 4,
7399
	.nrprocs		= ARRAY_SIZE(nfs4_procedures),
L
Linus Torvalds 已提交
7400 7401 7402 7403 7404 7405 7406 7407
	.procs			= nfs4_procedures
};

/*
 * Local variables:
 *  c-basic-offset: 8
 * End:
 */