nfs4xdr.c 192.7 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))
#else
#define	nfs4_label_maxsz	0
#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)
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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_getdeviceinfo_maxsz (op_encode_hdr_maxsz + \
				XDR_QUADLEN(NFS4_DEVICEID4_SIZE) + \
				1 /* layout type */ + \
				1 /* maxcount */ + \
				1 /* bitmap size */ + \
				1 /* notification bitmap length */ + \
				1 /* notification bitmap, word 0 */)
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#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 */ + \
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				1 /* notification bitmap, word 0 */)
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#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 */ + \
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				1 /* layoutupdate4 opaqueue len */)
				  /* the actual content of layoutupdate4 should
				     be allocated by drivers and spliced in
				     using xdr_write_pages */
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#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 + \
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				encode_getattr_maxsz + \
				encode_renew_maxsz)
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#define NFS4_dec_getattr_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 + \
				decode_renew_maxsz)
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#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 + \
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				 encode_fs_locations_maxsz + \
				 encode_renew_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 + \
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				 decode_fs_locations_maxsz + \
				 decode_renew_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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#define NFS4_enc_fsid_present_sz \
				(compound_encode_hdr_maxsz + \
				 encode_sequence_maxsz + \
				 encode_putfh_maxsz + \
				 encode_getfh_maxsz + \
				 encode_renew_maxsz)
#define NFS4_dec_fsid_present_sz \
				(compound_decode_hdr_maxsz + \
				 decode_sequence_maxsz + \
				 decode_putfh_maxsz + \
				 decode_getfh_maxsz + \
				 decode_renew_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)
803 804 805 806 807 808
#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)
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)
L
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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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}

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

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	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
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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
Trond Myklebust 已提交
1259 1260
static inline int nfs4_lock_type(struct file_lock *fl, int block)
{
1261
	if (fl->fl_type == F_RDLCK)
T
Trond Myklebust 已提交
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
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1290
{
A
Al Viro 已提交
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
Benny Halevy 已提交
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
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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
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1305 1306
	}
	else {
1307
		encode_nfs4_stateid(xdr, args->lock_stateid);
1308
		encode_nfs4_seqid(xdr, args->lock_seqid);
L
Linus Torvalds 已提交
1309 1310 1311
	}
}

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

T
Trond Myklebust 已提交
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
Benny Halevy 已提交
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
Linus Torvalds 已提交
1325
{
A
Al Viro 已提交
1326
	__be32 *p;
L
Linus Torvalds 已提交
1327

T
Trond Myklebust 已提交
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
Linus Torvalds 已提交
1347 1348
}

1349
static void encode_share_access(struct xdr_stream *xdr, fmode_t fmode)
L
Linus Torvalds 已提交
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
Linus Torvalds 已提交
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
Linus Torvalds 已提交
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
Linus Torvalds 已提交
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
Linus Torvalds 已提交
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 1549
static void encode_read(struct xdr_stream *xdr, const struct nfs_pgio_args *args,
			struct compound_hdr *hdr)
L
Linus Torvalds 已提交
1550
{
A
Al Viro 已提交
1551
	__be32 *p;
L
Linus Torvalds 已提交
1552

T
Trond Myklebust 已提交
1553
	encode_op_hdr(xdr, OP_READ, decode_read_maxsz, hdr);
1554
	encode_nfs4_stateid(xdr, &args->stateid);
L
Linus Torvalds 已提交
1555

1556
	p = reserve_space(xdr, 12);
B
Benny Halevy 已提交
1557
	p = xdr_encode_hyper(p, args->offset);
1558
	*p = cpu_to_be32(args->count);
L
Linus Torvalds 已提交
1559 1560
}

1561
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
1562
{
1563
	uint32_t attrs[3] = {
1564 1565 1566
		FATTR4_WORD0_RDATTR_ERROR,
		FATTR4_WORD1_MOUNTED_ON_FILEID,
	};
1567
	uint32_t dircount = readdir->count >> 1;
1568
	__be32 *p, verf[2];
1569 1570
	uint32_t attrlen = 0;
	unsigned int i;
L
Linus Torvalds 已提交
1571

B
Bryan Schumaker 已提交
1572 1573
	if (readdir->plus) {
		attrs[0] |= FATTR4_WORD0_TYPE|FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE|
1574
			FATTR4_WORD0_FSID|FATTR4_WORD0_FILEHANDLE|FATTR4_WORD0_FILEID;
B
Bryan Schumaker 已提交
1575 1576 1577 1578
		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;
1579
		attrs[2] |= FATTR4_WORD2_SECURITY_LABEL;
1580
		dircount >>= 1;
B
Bryan Schumaker 已提交
1581
	}
1582 1583 1584
	/* Use mounted_on_fileid only if the server supports it */
	if (!(readdir->bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID))
		attrs[0] |= FATTR4_WORD0_FILEID;
1585 1586 1587 1588 1589
	for (i = 0; i < ARRAY_SIZE(attrs); i++) {
		attrs[i] &= readdir->bitmask[i];
		if (attrs[i] != 0)
			attrlen = i+1;
	}
B
Bryan Schumaker 已提交
1590

T
Trond Myklebust 已提交
1591
	encode_op_hdr(xdr, OP_READDIR, decode_readdir_maxsz, hdr);
1592
	encode_uint64(xdr, readdir->cookie);
1593
	encode_nfs4_verifier(xdr, &readdir->verifier);
1594
	p = reserve_space(xdr, 12 + (attrlen << 2));
1595
	*p++ = cpu_to_be32(dircount);
B
Benny Halevy 已提交
1596
	*p++ = cpu_to_be32(readdir->count);
1597 1598 1599
	*p++ = cpu_to_be32(attrlen);
	for (i = 0; i < attrlen; i++)
		*p++ = cpu_to_be32(attrs[i]);
1600
	memcpy(verf, readdir->verifier.data, sizeof(verf));
1601 1602

	dprintk("%s: cookie = %llu, verifier = %08x:%08x, bitmap = %08x:%08x:%08x\n",
1603
			__func__,
1604
			(unsigned long long)readdir->cookie,
1605
			verf[0], verf[1],
1606
			attrs[0] & readdir->bitmask[0],
1607 1608
			attrs[1] & readdir->bitmask[1],
			attrs[2] & readdir->bitmask[2]);
L
Linus Torvalds 已提交
1609 1610
}

1611
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
1612
{
T
Trond Myklebust 已提交
1613
	encode_op_hdr(xdr, OP_READLINK, decode_readlink_maxsz, hdr);
L
Linus Torvalds 已提交
1614 1615
}

1616
static void encode_remove(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
L
Linus Torvalds 已提交
1617
{
T
Trond Myklebust 已提交
1618
	encode_op_hdr(xdr, OP_REMOVE, decode_remove_maxsz, hdr);
1619
	encode_string(xdr, name->len, name->name);
L
Linus Torvalds 已提交
1620 1621
}

1622
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
1623
{
T
Trond Myklebust 已提交
1624
	encode_op_hdr(xdr, OP_RENAME, decode_rename_maxsz, hdr);
1625 1626
	encode_string(xdr, oldname->len, oldname->name);
	encode_string(xdr, newname->len, newname->name);
L
Linus Torvalds 已提交
1627 1628
}

1629 1630
static void encode_renew(struct xdr_stream *xdr, clientid4 clid,
			 struct compound_hdr *hdr)
L
Linus Torvalds 已提交
1631
{
T
Trond Myklebust 已提交
1632
	encode_op_hdr(xdr, OP_RENEW, decode_renew_maxsz, hdr);
1633
	encode_uint64(xdr, clid);
L
Linus Torvalds 已提交
1634 1635
}

1636
static void
1637
encode_restorefh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1638
{
T
Trond Myklebust 已提交
1639
	encode_op_hdr(xdr, OP_RESTOREFH, decode_restorefh_maxsz, hdr);
1640 1641
}

1642
static void
1643
encode_setacl(struct xdr_stream *xdr, struct nfs_setaclargs *arg, struct compound_hdr *hdr)
1644
{
A
Al Viro 已提交
1645
	__be32 *p;
1646

T
Trond Myklebust 已提交
1647
	encode_op_hdr(xdr, OP_SETATTR, decode_setacl_maxsz, hdr);
1648
	encode_nfs4_stateid(xdr, &zero_stateid);
1649
	p = reserve_space(xdr, 2*4);
B
Benny Halevy 已提交
1650
	*p++ = cpu_to_be32(1);
1651
	*p = cpu_to_be32(FATTR4_WORD0_ACL);
1652
	p = reserve_space(xdr, 4);
1653
	*p = cpu_to_be32(arg->acl_len);
1654 1655 1656
	xdr_write_pages(xdr, arg->acl_pages, arg->acl_pgbase, arg->acl_len);
}

1657
static void
1658
encode_savefh(struct xdr_stream *xdr, struct compound_hdr *hdr)
L
Linus Torvalds 已提交
1659
{
T
Trond Myklebust 已提交
1660
	encode_op_hdr(xdr, OP_SAVEFH, decode_savefh_maxsz, hdr);
L
Linus Torvalds 已提交
1661 1662
}

1663
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
1664
{
T
Trond Myklebust 已提交
1665
	encode_op_hdr(xdr, OP_SETATTR, decode_setattr_maxsz, hdr);
1666
	encode_nfs4_stateid(xdr, &arg->stateid);
1667
	encode_attrs(xdr, arg->iap, arg->label, server);
L
Linus Torvalds 已提交
1668 1669
}

1670
static void encode_setclientid(struct xdr_stream *xdr, const struct nfs4_setclientid *setclientid, struct compound_hdr *hdr)
L
Linus Torvalds 已提交
1671
{
A
Al Viro 已提交
1672
	__be32 *p;
L
Linus Torvalds 已提交
1673

1674
	encode_op_hdr(xdr, OP_SETCLIENTID, decode_setclientid_maxsz, hdr);
1675
	encode_nfs4_verifier(xdr, setclientid->sc_verifier);
L
Linus Torvalds 已提交
1676 1677

	encode_string(xdr, setclientid->sc_name_len, setclientid->sc_name);
1678
	p = reserve_space(xdr, 4);
1679
	*p = cpu_to_be32(setclientid->sc_prog);
L
Linus Torvalds 已提交
1680 1681
	encode_string(xdr, setclientid->sc_netid_len, setclientid->sc_netid);
	encode_string(xdr, setclientid->sc_uaddr_len, setclientid->sc_uaddr);
1682
	p = reserve_space(xdr, 4);
1683
	*p = cpu_to_be32(setclientid->sc_cb_ident);
L
Linus Torvalds 已提交
1684 1685
}

1686
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
1687
{
T
Trond Myklebust 已提交
1688 1689
	encode_op_hdr(xdr, OP_SETCLIENTID_CONFIRM,
			decode_setclientid_confirm_maxsz, hdr);
1690
	encode_uint64(xdr, arg->clientid);
1691
	encode_nfs4_verifier(xdr, &arg->confirm);
L
Linus Torvalds 已提交
1692 1693
}

1694 1695
static void encode_write(struct xdr_stream *xdr, const struct nfs_pgio_args *args,
			 struct compound_hdr *hdr)
L
Linus Torvalds 已提交
1696
{
A
Al Viro 已提交
1697
	__be32 *p;
L
Linus Torvalds 已提交
1698

T
Trond Myklebust 已提交
1699
	encode_op_hdr(xdr, OP_WRITE, decode_write_maxsz, hdr);
1700
	encode_nfs4_stateid(xdr, &args->stateid);
L
Linus Torvalds 已提交
1701

1702
	p = reserve_space(xdr, 16);
B
Benny Halevy 已提交
1703
	p = xdr_encode_hyper(p, args->offset);
B
Benny Halevy 已提交
1704
	*p++ = cpu_to_be32(args->stable);
1705
	*p = cpu_to_be32(args->count);
L
Linus Torvalds 已提交
1706 1707 1708 1709

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

1710
static void encode_delegreturn(struct xdr_stream *xdr, const nfs4_stateid *stateid, struct compound_hdr *hdr)
L
Linus Torvalds 已提交
1711
{
T
Trond Myklebust 已提交
1712
	encode_op_hdr(xdr, OP_DELEGRETURN, decode_delegreturn_maxsz, hdr);
1713
	encode_nfs4_stateid(xdr, stateid);
L
Linus Torvalds 已提交
1714
}
1715

B
Bryan Schumaker 已提交
1716 1717
static void encode_secinfo(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
{
T
Trond Myklebust 已提交
1718
	encode_op_hdr(xdr, OP_SECINFO, decode_secinfo_maxsz, hdr);
1719
	encode_string(xdr, name->len, name->name);
B
Bryan Schumaker 已提交
1720 1721
}

B
Benny Halevy 已提交
1722
#if defined(CONFIG_NFS_V4_1)
1723
/* NFSv4.1 operations */
1724 1725 1726 1727 1728 1729 1730 1731 1732 1733 1734 1735 1736 1737
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 */
}

1738 1739 1740 1741 1742 1743 1744 1745
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
1746 1747 1748 1749 1750
static void encode_exchange_id(struct xdr_stream *xdr,
			       struct nfs41_exchange_id_args *args,
			       struct compound_hdr *hdr)
{
	__be32 *p;
1751
	char impl_name[IMPL_NAME_LIMIT];
1752
	int len = 0;
B
Benny Halevy 已提交
1753

1754
	encode_op_hdr(xdr, OP_EXCHANGE_ID, decode_exchange_id_maxsz, hdr);
1755
	encode_nfs4_verifier(xdr, args->verifier);
B
Benny Halevy 已提交
1756 1757 1758

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

1759 1760 1761 1762 1763 1764 1765 1766 1767 1768 1769 1770 1771 1772
	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;
	}
1773 1774 1775 1776

	if (send_implementation_id &&
	    sizeof(CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN) > 1 &&
	    sizeof(CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN)
1777
		<= sizeof(impl_name) + 1)
1778 1779 1780 1781 1782
		len = snprintf(impl_name, sizeof(impl_name), "%s %s %s %s",
			       utsname()->sysname, utsname()->release,
			       utsname()->version, utsname()->machine);

	if (len > 0) {
1783
		encode_uint32(xdr, 1);	/* implementation id array length=1 */
1784 1785 1786 1787 1788 1789 1790 1791 1792 1793

		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
1794
		encode_uint32(xdr, 0);	/* implementation id array length=0 */
B
Benny Halevy 已提交
1795
}
A
Andy Adamson 已提交
1796 1797 1798 1799 1800 1801 1802 1803 1804

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;
1805
	struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id);
1806 1807 1808 1809 1810 1811 1812 1813
	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
1814

1815 1816
	len = scnprintf(machine_name, sizeof(machine_name), "%s",
			clp->cl_ipaddr);
A
Andy Adamson 已提交
1817

T
Trond Myklebust 已提交
1818 1819
	encode_op_hdr(xdr, OP_CREATE_SESSION, decode_create_session_maxsz, hdr);
	p = reserve_space(xdr, 16 + 2*28 + 20 + len + 12);
1820
	p = xdr_encode_hyper(p, clp->cl_clientid);
B
Benny Halevy 已提交
1821 1822
	*p++ = cpu_to_be32(clp->cl_seqid);			/*Sequence id */
	*p++ = cpu_to_be32(args->flags);			/*flags */
A
Andy Adamson 已提交
1823 1824

	/* Fore Channel */
1825
	*p++ = cpu_to_be32(0);				/* header padding size */
B
Benny Halevy 已提交
1826 1827
	*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 */
1828
	*p++ = cpu_to_be32(max_resp_sz_cached);		/* Max resp sz cached */
B
Benny Halevy 已提交
1829 1830 1831
	*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
1832 1833

	/* Back Channel */
1834
	*p++ = cpu_to_be32(0);				/* header padding size */
B
Benny Halevy 已提交
1835 1836 1837 1838 1839 1840
	*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
1841

B
Benny Halevy 已提交
1842 1843 1844
	*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
1845 1846

	/* authsys_parms rfc1831 */
1847
	*p++ = cpu_to_be32(nn->boot_time.tv_nsec);	/* stamp */
1848
	p = xdr_encode_opaque(p, machine_name, len);
B
Benny Halevy 已提交
1849 1850
	*p++ = cpu_to_be32(0);				/* UID */
	*p++ = cpu_to_be32(0);				/* GID */
1851
	*p = cpu_to_be32(0);				/* No more gids */
A
Andy Adamson 已提交
1852
}
A
Andy Adamson 已提交
1853 1854 1855 1856 1857

static void encode_destroy_session(struct xdr_stream *xdr,
				   struct nfs4_session *session,
				   struct compound_hdr *hdr)
{
T
Trond Myklebust 已提交
1858 1859
	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
1860
}
1861

T
Trond Myklebust 已提交
1862 1863 1864 1865 1866 1867 1868 1869
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);
}

1870 1871 1872 1873
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
1874 1875
	encode_op_hdr(xdr, OP_RECLAIM_COMPLETE, decode_reclaim_complete_maxsz, hdr);
	encode_uint32(xdr, args->one_fs);
1876
}
B
Benny Halevy 已提交
1877 1878
#endif /* CONFIG_NFS_V4_1 */

1879 1880 1881 1882 1883
static void encode_sequence(struct xdr_stream *xdr,
			    const struct nfs4_sequence_args *args,
			    struct compound_hdr *hdr)
{
#if defined(CONFIG_NFS_V4_1)
1884
	struct nfs4_session *session;
A
Andy Adamson 已提交
1885
	struct nfs4_slot_table *tp;
1886
	struct nfs4_slot *slot = args->sa_slot;
A
Andy Adamson 已提交
1887
	__be32 *p;
1888

1889 1890
	tp = slot->table;
	session = tp->session;
C
Chuck Lever 已提交
1891 1892
	if (!session)
		return;
A
Andy Adamson 已提交
1893

T
Trond Myklebust 已提交
1894
	encode_op_hdr(xdr, OP_SEQUENCE, decode_sequence_maxsz, hdr);
A
Andy Adamson 已提交
1895 1896 1897 1898 1899 1900 1901 1902 1903 1904 1905

	/*
	 * 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],
1906
		slot->seq_nr, slot->slot_nr,
A
Andy Adamson 已提交
1907
		tp->highest_used_slotid, args->sa_cache_this);
T
Trond Myklebust 已提交
1908
	p = reserve_space(xdr, NFS4_MAX_SESSIONID_LEN + 16);
B
Benny Halevy 已提交
1909
	p = xdr_encode_opaque_fixed(p, session->sess_id.data, NFS4_MAX_SESSIONID_LEN);
B
Benny Halevy 已提交
1910
	*p++ = cpu_to_be32(slot->seq_nr);
1911
	*p++ = cpu_to_be32(slot->slot_nr);
B
Benny Halevy 已提交
1912
	*p++ = cpu_to_be32(tp->highest_used_slotid);
1913
	*p = cpu_to_be32(args->sa_cache_this);
1914 1915 1916
#endif /* CONFIG_NFS_V4_1 */
}

1917 1918 1919 1920 1921 1922 1923 1924
#ifdef CONFIG_NFS_V4_1
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
1925
	encode_op_hdr(xdr, OP_GETDEVICEINFO, decode_getdeviceinfo_maxsz, hdr);
1926
	p = reserve_space(xdr, NFS4_DEVICEID4_SIZE + 4 + 4);
1927 1928 1929
	p = xdr_encode_opaque_fixed(p, args->pdev->dev_id.data,
				    NFS4_DEVICEID4_SIZE);
	*p++ = cpu_to_be32(args->pdev->layout_type);
1930
	*p++ = cpu_to_be32(args->pdev->maxcount);	/* gdia_maxcount */
1931 1932 1933 1934

	p = reserve_space(xdr, 4 + 4);
	*p++ = cpu_to_be32(1);			/* bitmap length */
	*p++ = cpu_to_be32(NOTIFY_DEVICEID4_CHANGE | NOTIFY_DEVICEID4_DELETE);
1935 1936 1937 1938 1939 1940 1941 1942 1943
}

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
1944 1945
	encode_op_hdr(xdr, OP_LAYOUTGET, decode_layoutget_maxsz, hdr);
	p = reserve_space(xdr, 36);
1946 1947 1948 1949 1950 1951
	*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);
1952
	encode_nfs4_stateid(xdr, &args->stateid);
T
Trond Myklebust 已提交
1953
	encode_uint32(xdr, args->maxcount);
1954 1955 1956 1957 1958 1959 1960 1961 1962

	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
1963 1964 1965

static int
encode_layoutcommit(struct xdr_stream *xdr,
B
Benny Halevy 已提交
1966
		    struct inode *inode,
1967
		    struct nfs4_layoutcommit_args *args,
A
Andy Adamson 已提交
1968 1969 1970 1971 1972 1973 1974
		    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
1975 1976
	encode_op_hdr(xdr, OP_LAYOUTCOMMIT, decode_layoutcommit_maxsz, hdr);
	p = reserve_space(xdr, 20);
A
Andy Adamson 已提交
1977 1978
	/* Only whole file layouts */
	p = xdr_encode_hyper(p, 0); /* offset */
P
Peng Tao 已提交
1979
	p = xdr_encode_hyper(p, args->lastbytewritten + 1);	/* length */
1980 1981 1982
	*p = cpu_to_be32(0); /* reclaim */
	encode_nfs4_stateid(xdr, &args->stateid);
	p = reserve_space(xdr, 20);
A
Andy Adamson 已提交
1983 1984 1985 1986
	*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
1987

1988
	if (NFS_SERVER(inode)->pnfs_curr_ld->encode_layoutcommit) {
B
Benny Halevy 已提交
1989 1990
		NFS_SERVER(inode)->pnfs_curr_ld->encode_layoutcommit(
			NFS_I(inode)->layout, xdr, args);
1991 1992 1993 1994 1995 1996 1997
	} else {
		encode_uint32(xdr, args->layoutupdate_len);
		if (args->layoutupdate_pages) {
			xdr_write_pages(xdr, args->layoutupdate_pages, 0,
					args->layoutupdate_len);
		}
	}
A
Andy Adamson 已提交
1998 1999 2000

	return 0;
}
B
Benny Halevy 已提交
2001 2002 2003 2004 2005 2006 2007 2008

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
2009 2010
	encode_op_hdr(xdr, OP_LAYOUTRETURN, decode_layoutreturn_maxsz, hdr);
	p = reserve_space(xdr, 16);
B
Benny Halevy 已提交
2011 2012 2013 2014
	*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);
2015
	p = reserve_space(xdr, 16);
B
Benny Halevy 已提交
2016 2017 2018
	p = xdr_encode_hyper(p, 0);
	p = xdr_encode_hyper(p, NFS4_MAX_UINT64);
	spin_lock(&args->inode->i_lock);
2019
	encode_nfs4_stateid(xdr, &args->stateid);
B
Benny Halevy 已提交
2020
	spin_unlock(&args->inode->i_lock);
A
Andy Adamson 已提交
2021 2022 2023
	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
2024 2025
	} else
		encode_uint32(xdr, 0);
B
Benny Halevy 已提交
2026
}
2027 2028 2029 2030 2031 2032

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
2033 2034
	encode_op_hdr(xdr, OP_SECINFO_NO_NAME, decode_secinfo_no_name_maxsz, hdr);
	encode_uint32(xdr, args->style);
2035 2036
	return 0;
}
B
Bryan Schumaker 已提交
2037 2038 2039 2040 2041

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
2042 2043
	encode_op_hdr(xdr, OP_TEST_STATEID, decode_test_stateid_maxsz, hdr);
	encode_uint32(xdr, 1);
2044
	encode_nfs4_stateid(xdr, args->stateid);
B
Bryan Schumaker 已提交
2045
}
B
Bryan Schumaker 已提交
2046 2047 2048 2049 2050

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
2051
	encode_op_hdr(xdr, OP_FREE_STATEID, decode_free_stateid_maxsz, hdr);
2052
	encode_nfs4_stateid(xdr, &args->stateid);
B
Bryan Schumaker 已提交
2053
}
2054 2055
#endif /* CONFIG_NFS_V4_1 */

L
Linus Torvalds 已提交
2056 2057 2058 2059
/*
 * END OF "GENERIC" ENCODE ROUTINES.
 */

2060 2061 2062
static u32 nfs4_xdr_minorversion(const struct nfs4_sequence_args *args)
{
#if defined(CONFIG_NFS_V4_1)
C
Chuck Lever 已提交
2063 2064 2065
	struct nfs4_session *session = args->sa_slot->table->session;
	if (session)
		return session->clp->cl_mvops->minor_version;
2066 2067 2068 2069
#endif /* CONFIG_NFS_V4_1 */
	return 0;
}

L
Linus Torvalds 已提交
2070 2071 2072
/*
 * Encode an ACCESS request
 */
2073 2074
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
2075 2076
{
	struct compound_hdr hdr = {
2077
		.minorversion = nfs4_xdr_minorversion(&args->seq_args),
L
Linus Torvalds 已提交
2078 2079
	};

2080 2081 2082 2083 2084
	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);
2085
	encode_nops(&hdr);
L
Linus Torvalds 已提交
2086 2087 2088 2089 2090
}

/*
 * Encode LOOKUP request
 */
2091 2092
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
2093 2094
{
	struct compound_hdr hdr = {
2095
		.minorversion = nfs4_xdr_minorversion(&args->seq_args),
L
Linus Torvalds 已提交
2096 2097
	};

2098 2099 2100 2101 2102 2103
	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);
2104
	encode_nops(&hdr);
L
Linus Torvalds 已提交
2105 2106 2107 2108 2109
}

/*
 * Encode LOOKUP_ROOT request
 */
2110 2111 2112
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
2113 2114
{
	struct compound_hdr hdr = {
2115
		.minorversion = nfs4_xdr_minorversion(&args->seq_args),
L
Linus Torvalds 已提交
2116 2117
	};

2118 2119 2120 2121 2122
	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);
2123
	encode_nops(&hdr);
L
Linus Torvalds 已提交
2124 2125 2126 2127 2128
}

/*
 * Encode REMOVE request
 */
2129 2130
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
2131 2132
{
	struct compound_hdr hdr = {
2133
		.minorversion = nfs4_xdr_minorversion(&args->seq_args),
L
Linus Torvalds 已提交
2134 2135
	};

2136 2137 2138 2139
	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);
2140
	encode_nops(&hdr);
L
Linus Torvalds 已提交
2141 2142 2143 2144 2145
}

/*
 * Encode RENAME request
 */
2146 2147
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
2148 2149
{
	struct compound_hdr hdr = {
2150
		.minorversion = nfs4_xdr_minorversion(&args->seq_args),
L
Linus Torvalds 已提交
2151 2152
	};

2153 2154 2155 2156 2157 2158
	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);
2159
	encode_nops(&hdr);
L
Linus Torvalds 已提交
2160 2161 2162 2163 2164
}

/*
 * Encode LINK request
 */
2165 2166
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
2167 2168
{
	struct compound_hdr hdr = {
2169
		.minorversion = nfs4_xdr_minorversion(&args->seq_args),
L
Linus Torvalds 已提交
2170 2171
	};

2172 2173 2174 2175 2176 2177 2178 2179
	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);
2180
	encode_nops(&hdr);
L
Linus Torvalds 已提交
2181 2182 2183 2184 2185
}

/*
 * Encode CREATE request
 */
2186 2187
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
2188 2189
{
	struct compound_hdr hdr = {
2190
		.minorversion = nfs4_xdr_minorversion(&args->seq_args),
L
Linus Torvalds 已提交
2191 2192
	};

2193 2194 2195 2196 2197 2198
	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);
2199
	encode_nops(&hdr);
L
Linus Torvalds 已提交
2200 2201 2202 2203 2204
}

/*
 * Encode SYMLINK request
 */
2205 2206
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
2207
{
2208
	nfs4_xdr_enc_create(req, xdr, args);
L
Linus Torvalds 已提交
2209 2210 2211 2212 2213
}

/*
 * Encode GETATTR request
 */
2214 2215
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
2216 2217
{
	struct compound_hdr hdr = {
2218
		.minorversion = nfs4_xdr_minorversion(&args->seq_args),
L
Linus Torvalds 已提交
2219 2220
	};

2221 2222 2223 2224
	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);
2225
	encode_nops(&hdr);
L
Linus Torvalds 已提交
2226 2227 2228 2229 2230
}

/*
 * Encode a CLOSE request
 */
2231 2232
static void nfs4_xdr_enc_close(struct rpc_rqst *req, struct xdr_stream *xdr,
			       struct nfs_closeargs *args)
L
Linus Torvalds 已提交
2233
{
A
Andy Adamson 已提交
2234
	struct compound_hdr hdr = {
2235
		.minorversion = nfs4_xdr_minorversion(&args->seq_args),
A
Andy Adamson 已提交
2236 2237
	};

2238 2239 2240 2241 2242
	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);
2243
	encode_nops(&hdr);
L
Linus Torvalds 已提交
2244 2245 2246 2247 2248
}

/*
 * Encode an OPEN request
 */
2249 2250
static void nfs4_xdr_enc_open(struct rpc_rqst *req, struct xdr_stream *xdr,
			      struct nfs_openargs *args)
L
Linus Torvalds 已提交
2251 2252
{
	struct compound_hdr hdr = {
2253
		.minorversion = nfs4_xdr_minorversion(&args->seq_args),
L
Linus Torvalds 已提交
2254 2255
	};

2256 2257 2258 2259 2260
	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);
2261 2262
	if (args->access)
		encode_access(xdr, args->access, &hdr);
2263
	encode_getfattr_open(xdr, args->bitmask, args->open_bitmap, &hdr);
2264
	encode_nops(&hdr);
L
Linus Torvalds 已提交
2265 2266 2267 2268 2269
}

/*
 * Encode an OPEN_CONFIRM request
 */
2270 2271 2272
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
2273 2274
{
	struct compound_hdr hdr = {
2275
		.nops   = 0,
L
Linus Torvalds 已提交
2276 2277
	};

2278 2279 2280
	encode_compound_hdr(xdr, req, &hdr);
	encode_putfh(xdr, args->fh, &hdr);
	encode_open_confirm(xdr, args, &hdr);
2281
	encode_nops(&hdr);
L
Linus Torvalds 已提交
2282 2283 2284 2285 2286
}

/*
 * Encode an OPEN request with no attributes.
 */
2287 2288 2289
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
2290 2291
{
	struct compound_hdr hdr = {
2292
		.minorversion = nfs4_xdr_minorversion(&args->seq_args),
L
Linus Torvalds 已提交
2293 2294
	};

2295 2296 2297 2298
	encode_compound_hdr(xdr, req, &hdr);
	encode_sequence(xdr, &args->seq_args, &hdr);
	encode_putfh(xdr, args->fh, &hdr);
	encode_open(xdr, args, &hdr);
2299 2300
	if (args->access)
		encode_access(xdr, args->access, &hdr);
2301
	encode_getfattr_open(xdr, args->bitmask, args->open_bitmap, &hdr);
2302
	encode_nops(&hdr);
L
Linus Torvalds 已提交
2303 2304 2305 2306 2307
}

/*
 * Encode an OPEN_DOWNGRADE request
 */
2308 2309 2310
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
2311 2312
{
	struct compound_hdr hdr = {
2313
		.minorversion = nfs4_xdr_minorversion(&args->seq_args),
L
Linus Torvalds 已提交
2314 2315
	};

2316 2317 2318 2319 2320
	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);
2321
	encode_nops(&hdr);
L
Linus Torvalds 已提交
2322 2323 2324 2325 2326
}

/*
 * Encode a LOCK request
 */
2327 2328
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
2329 2330
{
	struct compound_hdr hdr = {
2331
		.minorversion = nfs4_xdr_minorversion(&args->seq_args),
L
Linus Torvalds 已提交
2332 2333
	};

2334 2335 2336 2337
	encode_compound_hdr(xdr, req, &hdr);
	encode_sequence(xdr, &args->seq_args, &hdr);
	encode_putfh(xdr, args->fh, &hdr);
	encode_lock(xdr, args, &hdr);
2338
	encode_nops(&hdr);
L
Linus Torvalds 已提交
2339 2340 2341 2342 2343
}

/*
 * Encode a LOCKT request
 */
2344 2345
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
2346 2347
{
	struct compound_hdr hdr = {
2348
		.minorversion = nfs4_xdr_minorversion(&args->seq_args),
L
Linus Torvalds 已提交
2349 2350
	};

2351 2352 2353 2354
	encode_compound_hdr(xdr, req, &hdr);
	encode_sequence(xdr, &args->seq_args, &hdr);
	encode_putfh(xdr, args->fh, &hdr);
	encode_lockt(xdr, args, &hdr);
2355
	encode_nops(&hdr);
L
Linus Torvalds 已提交
2356 2357 2358 2359 2360
}

/*
 * Encode a LOCKU request
 */
2361 2362
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
2363 2364
{
	struct compound_hdr hdr = {
2365
		.minorversion = nfs4_xdr_minorversion(&args->seq_args),
L
Linus Torvalds 已提交
2366 2367
	};

2368 2369 2370 2371
	encode_compound_hdr(xdr, req, &hdr);
	encode_sequence(xdr, &args->seq_args, &hdr);
	encode_putfh(xdr, args->fh, &hdr);
	encode_locku(xdr, args, &hdr);
2372
	encode_nops(&hdr);
L
Linus Torvalds 已提交
2373 2374
}

2375 2376 2377
static void nfs4_xdr_enc_release_lockowner(struct rpc_rqst *req,
					   struct xdr_stream *xdr,
					struct nfs_release_lockowner_args *args)
2378 2379 2380 2381 2382
{
	struct compound_hdr hdr = {
		.minorversion = 0,
	};

2383 2384
	encode_compound_hdr(xdr, req, &hdr);
	encode_release_lockowner(xdr, &args->lock_owner, &hdr);
2385 2386 2387
	encode_nops(&hdr);
}

L
Linus Torvalds 已提交
2388 2389 2390
/*
 * Encode a READLINK request
 */
2391 2392
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
2393 2394
{
	struct compound_hdr hdr = {
2395
		.minorversion = nfs4_xdr_minorversion(&args->seq_args),
L
Linus Torvalds 已提交
2396 2397
	};

2398 2399 2400 2401
	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);
2402

2403
	xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2, args->pages,
2404
			args->pgbase, args->pglen);
2405
	encode_nops(&hdr);
L
Linus Torvalds 已提交
2406 2407 2408 2409 2410
}

/*
 * Encode a READDIR request
 */
2411 2412
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
2413 2414
{
	struct compound_hdr hdr = {
2415
		.minorversion = nfs4_xdr_minorversion(&args->seq_args),
L
Linus Torvalds 已提交
2416 2417
	};

2418 2419 2420 2421
	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);
2422

2423
	xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2, args->pages,
2424 2425
			 args->pgbase, args->count);
	dprintk("%s: inlined page args = (%u, %p, %u, %u)\n",
2426
			__func__, hdr.replen << 2, args->pages,
2427
			args->pgbase, args->count);
2428
	encode_nops(&hdr);
L
Linus Torvalds 已提交
2429 2430 2431 2432 2433
}

/*
 * Encode a READ request
 */
2434
static void nfs4_xdr_enc_read(struct rpc_rqst *req, struct xdr_stream *xdr,
2435
			      struct nfs_pgio_args *args)
L
Linus Torvalds 已提交
2436 2437
{
	struct compound_hdr hdr = {
2438
		.minorversion = nfs4_xdr_minorversion(&args->seq_args),
L
Linus Torvalds 已提交
2439 2440
	};

2441 2442 2443 2444
	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
2445

2446
	xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2,
L
Linus Torvalds 已提交
2447
			 args->pages, args->pgbase, args->count);
2448
	req->rq_rcv_buf.flags |= XDRBUF_READ;
2449
	encode_nops(&hdr);
L
Linus Torvalds 已提交
2450 2451 2452 2453 2454
}

/*
 * Encode an SETATTR request
 */
2455 2456
static void nfs4_xdr_enc_setattr(struct rpc_rqst *req, struct xdr_stream *xdr,
				 struct nfs_setattrargs *args)
L
Linus Torvalds 已提交
2457
{
A
Andy Adamson 已提交
2458
	struct compound_hdr hdr = {
2459
		.minorversion = nfs4_xdr_minorversion(&args->seq_args),
A
Andy Adamson 已提交
2460 2461
	};

2462 2463 2464 2465 2466
	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);
2467
	encode_nops(&hdr);
L
Linus Torvalds 已提交
2468 2469
}

2470 2471 2472
/*
 * Encode a GETACL request
 */
2473 2474
static void nfs4_xdr_enc_getacl(struct rpc_rqst *req, struct xdr_stream *xdr,
				struct nfs_getaclargs *args)
2475 2476
{
	struct compound_hdr hdr = {
2477
		.minorversion = nfs4_xdr_minorversion(&args->seq_args),
2478
	};
2479
	uint32_t replen;
2480

2481 2482 2483
	encode_compound_hdr(xdr, req, &hdr);
	encode_sequence(xdr, &args->seq_args, &hdr);
	encode_putfh(xdr, args->fh, &hdr);
2484
	replen = hdr.replen + op_decode_hdr_maxsz + 1;
2485
	encode_getattr_two(xdr, FATTR4_WORD0_ACL, 0, &hdr);
2486

2487
	xdr_inline_pages(&req->rq_rcv_buf, replen << 2,
2488
		args->acl_pages, args->acl_pgbase, args->acl_len);
2489

2490
	encode_nops(&hdr);
2491 2492
}

L
Linus Torvalds 已提交
2493 2494 2495
/*
 * Encode a WRITE request
 */
2496
static void nfs4_xdr_enc_write(struct rpc_rqst *req, struct xdr_stream *xdr,
2497
			       struct nfs_pgio_args *args)
L
Linus Torvalds 已提交
2498 2499
{
	struct compound_hdr hdr = {
2500
		.minorversion = nfs4_xdr_minorversion(&args->seq_args),
L
Linus Torvalds 已提交
2501 2502
	};

2503 2504 2505 2506
	encode_compound_hdr(xdr, req, &hdr);
	encode_sequence(xdr, &args->seq_args, &hdr);
	encode_putfh(xdr, args->fh, &hdr);
	encode_write(xdr, args, &hdr);
2507
	req->rq_snd_buf.flags |= XDRBUF_WRITE;
2508 2509
	if (args->bitmask)
		encode_getfattr(xdr, args->bitmask, &hdr);
2510
	encode_nops(&hdr);
L
Linus Torvalds 已提交
2511 2512 2513 2514 2515
}

/*
 *  a COMMIT request
 */
2516
static void nfs4_xdr_enc_commit(struct rpc_rqst *req, struct xdr_stream *xdr,
2517
				struct nfs_commitargs *args)
L
Linus Torvalds 已提交
2518 2519
{
	struct compound_hdr hdr = {
2520
		.minorversion = nfs4_xdr_minorversion(&args->seq_args),
L
Linus Torvalds 已提交
2521 2522
	};

2523 2524 2525 2526
	encode_compound_hdr(xdr, req, &hdr);
	encode_sequence(xdr, &args->seq_args, &hdr);
	encode_putfh(xdr, args->fh, &hdr);
	encode_commit(xdr, args, &hdr);
2527
	encode_nops(&hdr);
L
Linus Torvalds 已提交
2528 2529 2530 2531 2532
}

/*
 * FSINFO request
 */
2533 2534
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
2535 2536
{
	struct compound_hdr hdr = {
2537
		.minorversion = nfs4_xdr_minorversion(&args->seq_args),
L
Linus Torvalds 已提交
2538 2539
	};

2540 2541 2542 2543
	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);
2544
	encode_nops(&hdr);
L
Linus Torvalds 已提交
2545 2546 2547 2548 2549
}

/*
 * a PATHCONF request
 */
2550 2551
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
2552 2553
{
	struct compound_hdr hdr = {
2554
		.minorversion = nfs4_xdr_minorversion(&args->seq_args),
L
Linus Torvalds 已提交
2555 2556
	};

2557 2558 2559 2560
	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],
2561
			   &hdr);
2562
	encode_nops(&hdr);
L
Linus Torvalds 已提交
2563 2564 2565 2566 2567
}

/*
 * a STATFS request
 */
2568 2569
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
2570 2571
{
	struct compound_hdr hdr = {
2572
		.minorversion = nfs4_xdr_minorversion(&args->seq_args),
L
Linus Torvalds 已提交
2573 2574
	};

2575 2576 2577 2578
	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],
2579
			   args->bitmask[1] & nfs4_statfs_bitmap[1], &hdr);
2580
	encode_nops(&hdr);
L
Linus Torvalds 已提交
2581 2582 2583 2584 2585
}

/*
 * GETATTR_BITMAP request
 */
2586 2587 2588
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
2589 2590
{
	struct compound_hdr hdr = {
2591
		.minorversion = nfs4_xdr_minorversion(&args->seq_args),
L
Linus Torvalds 已提交
2592 2593
	};

2594 2595 2596 2597
	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|
2598
			   FATTR4_WORD0_FH_EXPIRE_TYPE|
2599 2600 2601
			   FATTR4_WORD0_LINK_SUPPORT|
			   FATTR4_WORD0_SYMLINK_SUPPORT|
			   FATTR4_WORD0_ACLSUPPORT, &hdr);
2602
	encode_nops(&hdr);
L
Linus Torvalds 已提交
2603 2604 2605 2606 2607
}

/*
 * a RENEW request
 */
2608 2609
static void nfs4_xdr_enc_renew(struct rpc_rqst *req, struct xdr_stream *xdr,
			       struct nfs_client *clp)
L
Linus Torvalds 已提交
2610 2611
{
	struct compound_hdr hdr = {
2612
		.nops	= 0,
L
Linus Torvalds 已提交
2613 2614
	};

2615
	encode_compound_hdr(xdr, req, &hdr);
2616
	encode_renew(xdr, clp->cl_clientid, &hdr);
2617
	encode_nops(&hdr);
L
Linus Torvalds 已提交
2618 2619 2620 2621 2622
}

/*
 * a SETCLIENTID request
 */
2623 2624 2625
static void nfs4_xdr_enc_setclientid(struct rpc_rqst *req,
				     struct xdr_stream *xdr,
				     struct nfs4_setclientid *sc)
L
Linus Torvalds 已提交
2626 2627
{
	struct compound_hdr hdr = {
2628
		.nops	= 0,
L
Linus Torvalds 已提交
2629 2630
	};

2631 2632
	encode_compound_hdr(xdr, req, &hdr);
	encode_setclientid(xdr, sc, &hdr);
2633
	encode_nops(&hdr);
L
Linus Torvalds 已提交
2634 2635 2636 2637 2638
}

/*
 * a SETCLIENTID_CONFIRM request
 */
2639 2640 2641
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
2642 2643
{
	struct compound_hdr hdr = {
2644
		.nops	= 0,
L
Linus Torvalds 已提交
2645 2646
	};

2647 2648
	encode_compound_hdr(xdr, req, &hdr);
	encode_setclientid_confirm(xdr, arg, &hdr);
2649
	encode_nops(&hdr);
L
Linus Torvalds 已提交
2650 2651 2652 2653 2654
}

/*
 * DELEGRETURN request
 */
2655 2656 2657
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
2658 2659
{
	struct compound_hdr hdr = {
2660
		.minorversion = nfs4_xdr_minorversion(&args->seq_args),
L
Linus Torvalds 已提交
2661 2662
	};

2663 2664 2665 2666
	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);
2667
	encode_delegreturn(xdr, args->stateid, &hdr);
2668
	encode_nops(&hdr);
L
Linus Torvalds 已提交
2669 2670
}

2671 2672 2673
/*
 * Encode FS_LOCATIONS request
 */
2674 2675 2676
static void nfs4_xdr_enc_fs_locations(struct rpc_rqst *req,
				      struct xdr_stream *xdr,
				      struct nfs4_fs_locations_arg *args)
2677 2678
{
	struct compound_hdr hdr = {
2679
		.minorversion = nfs4_xdr_minorversion(&args->seq_args),
2680
	};
2681
	uint32_t replen;
2682

2683 2684
	encode_compound_hdr(xdr, req, &hdr);
	encode_sequence(xdr, &args->seq_args, &hdr);
2685 2686 2687 2688 2689 2690 2691 2692 2693 2694 2695 2696
	if (args->migration) {
		encode_putfh(xdr, args->fh, &hdr);
		replen = hdr.replen;
		encode_fs_locations(xdr, args->bitmask, &hdr);
		if (args->renew)
			encode_renew(xdr, args->clientid, &hdr);
	} else {
		encode_putfh(xdr, args->dir_fh, &hdr);
		encode_lookup(xdr, args->name, &hdr);
		replen = hdr.replen;
		encode_fs_locations(xdr, args->bitmask, &hdr);
	}
2697

2698
	/* Set up reply kvec to capture returned fs_locations array. */
2699
	xdr_inline_pages(&req->rq_rcv_buf, replen << 2, &args->page,
2700
			0, PAGE_SIZE);
2701
	encode_nops(&hdr);
2702 2703
}

B
Bryan Schumaker 已提交
2704 2705 2706 2707 2708 2709 2710 2711 2712 2713 2714 2715 2716 2717 2718 2719 2720 2721
/*
 * 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);
}

2722 2723 2724 2725 2726 2727 2728 2729 2730 2731 2732 2733 2734 2735 2736 2737 2738 2739 2740 2741
/*
 * Encode FSID_PRESENT request
 */
static void nfs4_xdr_enc_fsid_present(struct rpc_rqst *req,
				      struct xdr_stream *xdr,
				      struct nfs4_fsid_present_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->fh, &hdr);
	encode_getfh(xdr, &hdr);
	if (args->renew)
		encode_renew(xdr, args->clientid, &hdr);
	encode_nops(&hdr);
}

B
Benny Halevy 已提交
2742
#if defined(CONFIG_NFS_V4_1)
2743 2744 2745 2746 2747 2748 2749 2750 2751 2752 2753 2754 2755 2756 2757 2758
/*
 * 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
2759 2760 2761
/*
 * EXCHANGE_ID request
 */
2762 2763 2764
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
2765 2766
{
	struct compound_hdr hdr = {
2767
		.minorversion = args->client->cl_mvops->minor_version,
B
Benny Halevy 已提交
2768 2769
	};

2770 2771
	encode_compound_hdr(xdr, req, &hdr);
	encode_exchange_id(xdr, args, &hdr);
B
Benny Halevy 已提交
2772 2773
	encode_nops(&hdr);
}
A
Andy Adamson 已提交
2774

A
Andy Adamson 已提交
2775 2776 2777
/*
 * a CREATE_SESSION request
 */
2778 2779 2780
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
2781 2782
{
	struct compound_hdr hdr = {
2783
		.minorversion = args->client->cl_mvops->minor_version,
A
Andy Adamson 已提交
2784 2785
	};

2786 2787
	encode_compound_hdr(xdr, req, &hdr);
	encode_create_session(xdr, args, &hdr);
A
Andy Adamson 已提交
2788 2789 2790
	encode_nops(&hdr);
}

A
Andy Adamson 已提交
2791 2792 2793
/*
 * a DESTROY_SESSION request
 */
2794 2795 2796
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
2797 2798
{
	struct compound_hdr hdr = {
2799
		.minorversion = session->clp->cl_mvops->minor_version,
A
Andy Adamson 已提交
2800 2801
	};

2802 2803
	encode_compound_hdr(xdr, req, &hdr);
	encode_destroy_session(xdr, session, &hdr);
A
Andy Adamson 已提交
2804 2805 2806
	encode_nops(&hdr);
}

T
Trond Myklebust 已提交
2807 2808 2809 2810 2811 2812 2813 2814 2815 2816 2817 2818 2819 2820 2821 2822
/*
 * 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
2823 2824 2825
/*
 * a SEQUENCE request
 */
2826 2827
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
2828 2829 2830 2831 2832
{
	struct compound_hdr hdr = {
		.minorversion = nfs4_xdr_minorversion(args),
	};

2833 2834
	encode_compound_hdr(xdr, req, &hdr);
	encode_sequence(xdr, args, &hdr);
A
Andy Adamson 已提交
2835 2836 2837
	encode_nops(&hdr);
}

A
Andy Adamson 已提交
2838 2839 2840
/*
 * a GET_LEASE_TIME request
 */
2841 2842 2843
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
2844 2845 2846 2847
{
	struct compound_hdr hdr = {
		.minorversion = nfs4_xdr_minorversion(&args->la_seq_args),
	};
2848
	const u32 lease_bitmap[3] = { FATTR4_WORD0_LEASE_TIME };
A
Andy Adamson 已提交
2849

2850 2851 2852 2853
	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
2854 2855
	encode_nops(&hdr);
}
2856 2857 2858 2859

/*
 * a RECLAIM_COMPLETE request
 */
2860 2861 2862
static void nfs4_xdr_enc_reclaim_complete(struct rpc_rqst *req,
					  struct xdr_stream *xdr,
				struct nfs41_reclaim_complete_args *args)
2863 2864 2865 2866 2867
{
	struct compound_hdr hdr = {
		.minorversion = nfs4_xdr_minorversion(&args->seq_args)
	};

2868 2869 2870
	encode_compound_hdr(xdr, req, &hdr);
	encode_sequence(xdr, &args->seq_args, &hdr);
	encode_reclaim_complete(xdr, args, &hdr);
2871 2872 2873
	encode_nops(&hdr);
}

2874 2875 2876
/*
 * Encode GETDEVICEINFO request
 */
2877 2878 2879
static void nfs4_xdr_enc_getdeviceinfo(struct rpc_rqst *req,
				       struct xdr_stream *xdr,
				       struct nfs4_getdeviceinfo_args *args)
2880 2881 2882 2883 2884
{
	struct compound_hdr hdr = {
		.minorversion = nfs4_xdr_minorversion(&args->seq_args),
	};

2885 2886 2887
	encode_compound_hdr(xdr, req, &hdr);
	encode_sequence(xdr, &args->seq_args, &hdr);
	encode_getdeviceinfo(xdr, args, &hdr);
2888 2889 2890 2891 2892 2893 2894 2895 2896 2897 2898 2899 2900

	/* 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
 */
2901 2902 2903
static void nfs4_xdr_enc_layoutget(struct rpc_rqst *req,
				   struct xdr_stream *xdr,
				   struct nfs4_layoutget_args *args)
2904 2905 2906 2907 2908
{
	struct compound_hdr hdr = {
		.minorversion = nfs4_xdr_minorversion(&args->seq_args),
	};

2909 2910 2911 2912
	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);
2913 2914 2915 2916

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

2917 2918
	encode_nops(&hdr);
}
A
Andy Adamson 已提交
2919 2920 2921 2922

/*
 *  Encode LAYOUTCOMMIT request
 */
B
Benny Halevy 已提交
2923 2924 2925
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
2926
{
B
Benny Halevy 已提交
2927 2928
	struct nfs4_layoutcommit_data *data =
		container_of(args, struct nfs4_layoutcommit_data, args);
A
Andy Adamson 已提交
2929 2930 2931 2932 2933 2934 2935
	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
2936
	encode_layoutcommit(xdr, data->args.inode, args, &hdr);
A
Andy Adamson 已提交
2937
	encode_getfattr(xdr, args->bitmask, &hdr);
2938
	encode_nops(&hdr);
B
Benny Halevy 已提交
2939 2940 2941 2942 2943 2944 2945 2946 2947 2948 2949 2950 2951 2952 2953 2954 2955 2956
}

/*
 * 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);
2957
}
2958 2959 2960 2961 2962 2963 2964 2965 2966 2967 2968 2969 2970 2971 2972 2973 2974 2975 2976

/*
 * 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
2977 2978 2979 2980 2981 2982 2983 2984 2985 2986 2987 2988 2989 2990 2991 2992 2993

/*
 *  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
2994 2995 2996 2997 2998 2999 3000 3001 3002 3003 3004 3005 3006 3007 3008 3009 3010

/*
 *  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
3011 3012
#endif /* CONFIG_NFS_V4_1 */

3013 3014 3015 3016 3017 3018
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
3019

3020
static int decode_opaque_inline(struct xdr_stream *xdr, unsigned int *len, char **string)
L
Linus Torvalds 已提交
3021
{
A
Al Viro 已提交
3022
	__be32 *p;
L
Linus Torvalds 已提交
3023

B
Benny Halevy 已提交
3024 3025 3026
	p = xdr_inline_decode(xdr, 4);
	if (unlikely(!p))
		goto out_overflow;
3027
	*len = be32_to_cpup(p);
B
Benny Halevy 已提交
3028 3029 3030
	p = xdr_inline_decode(xdr, *len);
	if (unlikely(!p))
		goto out_overflow;
L
Linus Torvalds 已提交
3031 3032
	*string = (char *)p;
	return 0;
B
Benny Halevy 已提交
3033 3034 3035
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
L
Linus Torvalds 已提交
3036 3037 3038 3039
}

static int decode_compound_hdr(struct xdr_stream *xdr, struct compound_hdr *hdr)
{
A
Al Viro 已提交
3040
	__be32 *p;
L
Linus Torvalds 已提交
3041

B
Benny Halevy 已提交
3042 3043 3044
	p = xdr_inline_decode(xdr, 8);
	if (unlikely(!p))
		goto out_overflow;
B
Benny Halevy 已提交
3045
	hdr->status = be32_to_cpup(p++);
3046
	hdr->taglen = be32_to_cpup(p);
3047

B
Benny Halevy 已提交
3048 3049 3050
	p = xdr_inline_decode(xdr, hdr->taglen + 4);
	if (unlikely(!p))
		goto out_overflow;
L
Linus Torvalds 已提交
3051 3052
	hdr->tag = (char *)p;
	p += XDR_QUADLEN(hdr->taglen);
3053
	hdr->nops = be32_to_cpup(p);
3054 3055
	if (unlikely(hdr->nops < 1))
		return nfs4_stat_to_errno(hdr->status);
L
Linus Torvalds 已提交
3056
	return 0;
B
Benny Halevy 已提交
3057 3058 3059
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
L
Linus Torvalds 已提交
3060 3061
}

3062 3063
static bool __decode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 expected,
		int *nfs_retval)
L
Linus Torvalds 已提交
3064
{
A
Al Viro 已提交
3065
	__be32 *p;
L
Linus Torvalds 已提交
3066 3067 3068
	uint32_t opnum;
	int32_t nfserr;

B
Benny Halevy 已提交
3069 3070 3071
	p = xdr_inline_decode(xdr, 8);
	if (unlikely(!p))
		goto out_overflow;
B
Benny Halevy 已提交
3072
	opnum = be32_to_cpup(p++);
3073 3074
	if (unlikely(opnum != expected))
		goto out_bad_operation;
3075
	nfserr = be32_to_cpup(p);
3076 3077 3078 3079 3080 3081 3082 3083 3084 3085 3086
	if (nfserr == NFS_OK)
		*nfs_retval = 0;
	else
		*nfs_retval = nfs4_stat_to_errno(nfserr);
	return true;
out_bad_operation:
	dprintk("nfs: Server returned operation"
		" %d but we issued a request for %d\n",
			opnum, expected);
	*nfs_retval = -EREMOTEIO;
	return false;
B
Benny Halevy 已提交
3087 3088
out_overflow:
	print_overflow_msg(__func__, xdr);
3089 3090 3091 3092 3093 3094 3095 3096 3097 3098
	*nfs_retval = -EIO;
	return false;
}

static int decode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 expected)
{
	int retval;

	__decode_op_hdr(xdr, expected, &retval);
	return retval;
L
Linus Torvalds 已提交
3099 3100 3101
}

/* Dummy routine */
3102
static int decode_ace(struct xdr_stream *xdr, void *ace, struct nfs_client *clp)
L
Linus Torvalds 已提交
3103
{
A
Al Viro 已提交
3104
	__be32 *p;
3105
	unsigned int strlen;
L
Linus Torvalds 已提交
3106 3107
	char *str;

B
Benny Halevy 已提交
3108 3109 3110 3111 3112
	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
3113 3114 3115 3116
}

static int decode_attr_bitmap(struct xdr_stream *xdr, uint32_t *bitmap)
{
A
Al Viro 已提交
3117 3118
	uint32_t bmlen;
	__be32 *p;
L
Linus Torvalds 已提交
3119

B
Benny Halevy 已提交
3120 3121 3122
	p = xdr_inline_decode(xdr, 4);
	if (unlikely(!p))
		goto out_overflow;
3123
	bmlen = be32_to_cpup(p);
L
Linus Torvalds 已提交
3124

3125
	bitmap[0] = bitmap[1] = bitmap[2] = 0;
B
Benny Halevy 已提交
3126 3127 3128
	p = xdr_inline_decode(xdr, (bmlen << 2));
	if (unlikely(!p))
		goto out_overflow;
L
Linus Torvalds 已提交
3129
	if (bmlen > 0) {
B
Benny Halevy 已提交
3130
		bitmap[0] = be32_to_cpup(p++);
3131 3132 3133 3134 3135
		if (bmlen > 1) {
			bitmap[1] = be32_to_cpup(p++);
			if (bmlen > 2)
				bitmap[2] = be32_to_cpup(p);
		}
L
Linus Torvalds 已提交
3136 3137
	}
	return 0;
B
Benny Halevy 已提交
3138 3139 3140
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
L
Linus Torvalds 已提交
3141 3142
}

3143
static int decode_attr_length(struct xdr_stream *xdr, uint32_t *attrlen, unsigned int *savep)
L
Linus Torvalds 已提交
3144
{
A
Al Viro 已提交
3145
	__be32 *p;
L
Linus Torvalds 已提交
3146

B
Benny Halevy 已提交
3147 3148 3149
	p = xdr_inline_decode(xdr, 4);
	if (unlikely(!p))
		goto out_overflow;
3150
	*attrlen = be32_to_cpup(p);
3151
	*savep = xdr_stream_pos(xdr);
L
Linus Torvalds 已提交
3152
	return 0;
B
Benny Halevy 已提交
3153 3154 3155
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
L
Linus Torvalds 已提交
3156 3157 3158 3159 3160
}

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
3161 3162 3163 3164
		int ret;
		ret = decode_attr_bitmap(xdr, bitmask);
		if (unlikely(ret < 0))
			return ret;
L
Linus Torvalds 已提交
3165 3166
		bitmap[0] &= ~FATTR4_WORD0_SUPPORTED_ATTRS;
	} else
3167 3168 3169
		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
3170 3171 3172 3173 3174
	return 0;
}

static int decode_attr_type(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *type)
{
A
Al Viro 已提交
3175
	__be32 *p;
3176
	int ret = 0;
L
Linus Torvalds 已提交
3177 3178 3179 3180 3181

	*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
3182 3183 3184
		p = xdr_inline_decode(xdr, 4);
		if (unlikely(!p))
			goto out_overflow;
3185
		*type = be32_to_cpup(p);
L
Linus Torvalds 已提交
3186
		if (*type < NF4REG || *type > NF4NAMEDATTR) {
3187
			dprintk("%s: bad type %d\n", __func__, *type);
L
Linus Torvalds 已提交
3188 3189 3190
			return -EIO;
		}
		bitmap[0] &= ~FATTR4_WORD0_TYPE;
3191
		ret = NFS_ATTR_FATTR_TYPE;
L
Linus Torvalds 已提交
3192
	}
3193
	dprintk("%s: type=0%o\n", __func__, nfs_type2fmt[*type]);
3194
	return ret;
B
Benny Halevy 已提交
3195 3196 3197
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
L
Linus Torvalds 已提交
3198 3199
}

3200 3201 3202 3203 3204 3205 3206 3207 3208 3209 3210 3211 3212 3213 3214 3215 3216 3217 3218 3219 3220 3221
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
3222 3223
static int decode_attr_change(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *change)
{
A
Al Viro 已提交
3224
	__be32 *p;
3225
	int ret = 0;
L
Linus Torvalds 已提交
3226 3227 3228 3229 3230

	*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
3231 3232 3233
		p = xdr_inline_decode(xdr, 8);
		if (unlikely(!p))
			goto out_overflow;
3234
		xdr_decode_hyper(p, change);
L
Linus Torvalds 已提交
3235
		bitmap[0] &= ~FATTR4_WORD0_CHANGE;
3236
		ret = NFS_ATTR_FATTR_CHANGE;
L
Linus Torvalds 已提交
3237
	}
3238
	dprintk("%s: change attribute=%Lu\n", __func__,
L
Linus Torvalds 已提交
3239
			(unsigned long long)*change);
3240
	return ret;
B
Benny Halevy 已提交
3241 3242 3243
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
L
Linus Torvalds 已提交
3244 3245 3246 3247
}

static int decode_attr_size(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *size)
{
A
Al Viro 已提交
3248
	__be32 *p;
3249
	int ret = 0;
L
Linus Torvalds 已提交
3250 3251 3252 3253 3254

	*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
3255 3256 3257
		p = xdr_inline_decode(xdr, 8);
		if (unlikely(!p))
			goto out_overflow;
3258
		xdr_decode_hyper(p, size);
L
Linus Torvalds 已提交
3259
		bitmap[0] &= ~FATTR4_WORD0_SIZE;
3260
		ret = NFS_ATTR_FATTR_SIZE;
L
Linus Torvalds 已提交
3261
	}
3262
	dprintk("%s: file size=%Lu\n", __func__, (unsigned long long)*size);
3263
	return ret;
B
Benny Halevy 已提交
3264 3265 3266
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
L
Linus Torvalds 已提交
3267 3268 3269 3270
}

static int decode_attr_link_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
{
A
Al Viro 已提交
3271
	__be32 *p;
L
Linus Torvalds 已提交
3272 3273 3274 3275 3276

	*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
3277 3278 3279
		p = xdr_inline_decode(xdr, 4);
		if (unlikely(!p))
			goto out_overflow;
3280
		*res = be32_to_cpup(p);
L
Linus Torvalds 已提交
3281 3282
		bitmap[0] &= ~FATTR4_WORD0_LINK_SUPPORT;
	}
3283
	dprintk("%s: link support=%s\n", __func__, *res == 0 ? "false" : "true");
L
Linus Torvalds 已提交
3284
	return 0;
B
Benny Halevy 已提交
3285 3286 3287
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
L
Linus Torvalds 已提交
3288 3289 3290 3291
}

static int decode_attr_symlink_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
{
A
Al Viro 已提交
3292
	__be32 *p;
L
Linus Torvalds 已提交
3293 3294 3295 3296 3297

	*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
3298 3299 3300
		p = xdr_inline_decode(xdr, 4);
		if (unlikely(!p))
			goto out_overflow;
3301
		*res = be32_to_cpup(p);
L
Linus Torvalds 已提交
3302 3303
		bitmap[0] &= ~FATTR4_WORD0_SYMLINK_SUPPORT;
	}
3304
	dprintk("%s: symlink support=%s\n", __func__, *res == 0 ? "false" : "true");
L
Linus Torvalds 已提交
3305
	return 0;
B
Benny Halevy 已提交
3306 3307 3308
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
L
Linus Torvalds 已提交
3309 3310
}

3311
static int decode_attr_fsid(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_fsid *fsid)
L
Linus Torvalds 已提交
3312
{
A
Al Viro 已提交
3313
	__be32 *p;
3314
	int ret = 0;
L
Linus Torvalds 已提交
3315 3316 3317 3318 3319 3320

	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
3321 3322 3323
		p = xdr_inline_decode(xdr, 16);
		if (unlikely(!p))
			goto out_overflow;
B
Benny Halevy 已提交
3324
		p = xdr_decode_hyper(p, &fsid->major);
3325
		xdr_decode_hyper(p, &fsid->minor);
L
Linus Torvalds 已提交
3326
		bitmap[0] &= ~FATTR4_WORD0_FSID;
3327
		ret = NFS_ATTR_FATTR_FSID;
L
Linus Torvalds 已提交
3328
	}
3329
	dprintk("%s: fsid=(0x%Lx/0x%Lx)\n", __func__,
L
Linus Torvalds 已提交
3330 3331
			(unsigned long long)fsid->major,
			(unsigned long long)fsid->minor);
3332
	return ret;
B
Benny Halevy 已提交
3333 3334 3335
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
L
Linus Torvalds 已提交
3336 3337 3338 3339
}

static int decode_attr_lease_time(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
{
A
Al Viro 已提交
3340
	__be32 *p;
L
Linus Torvalds 已提交
3341 3342 3343 3344 3345

	*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
3346 3347 3348
		p = xdr_inline_decode(xdr, 4);
		if (unlikely(!p))
			goto out_overflow;
3349
		*res = be32_to_cpup(p);
L
Linus Torvalds 已提交
3350 3351
		bitmap[0] &= ~FATTR4_WORD0_LEASE_TIME;
	}
3352
	dprintk("%s: file size=%u\n", __func__, (unsigned int)*res);
L
Linus Torvalds 已提交
3353
	return 0;
B
Benny Halevy 已提交
3354 3355 3356
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
L
Linus Torvalds 已提交
3357 3358
}

3359
static int decode_attr_error(struct xdr_stream *xdr, uint32_t *bitmap, int32_t *res)
3360 3361 3362 3363 3364 3365 3366 3367 3368 3369
{
	__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;
3370
		*res = -be32_to_cpup(p);
3371 3372 3373 3374 3375 3376 3377 3378 3379 3380 3381 3382
	}
	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;

3383 3384
	if (fh != NULL)
		memset(fh, 0, sizeof(*fh));
3385 3386 3387 3388 3389 3390 3391 3392 3393 3394 3395 3396 3397

	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;
3398 3399 3400 3401
		if (fh != NULL) {
			memcpy(fh->data, p, len);
			fh->size = len;
		}
3402 3403 3404 3405 3406 3407 3408 3409
		bitmap[0] &= ~FATTR4_WORD0_FILEHANDLE;
	}
	return 0;
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
}

L
Linus Torvalds 已提交
3410 3411
static int decode_attr_aclsupport(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
{
A
Al Viro 已提交
3412
	__be32 *p;
L
Linus Torvalds 已提交
3413

3414
	*res = 0;
L
Linus Torvalds 已提交
3415 3416 3417
	if (unlikely(bitmap[0] & (FATTR4_WORD0_ACLSUPPORT - 1U)))
		return -EIO;
	if (likely(bitmap[0] & FATTR4_WORD0_ACLSUPPORT)) {
B
Benny Halevy 已提交
3418 3419 3420
		p = xdr_inline_decode(xdr, 4);
		if (unlikely(!p))
			goto out_overflow;
3421
		*res = be32_to_cpup(p);
L
Linus Torvalds 已提交
3422 3423
		bitmap[0] &= ~FATTR4_WORD0_ACLSUPPORT;
	}
3424
	dprintk("%s: ACLs supported=%u\n", __func__, (unsigned int)*res);
L
Linus Torvalds 已提交
3425
	return 0;
B
Benny Halevy 已提交
3426 3427 3428
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
L
Linus Torvalds 已提交
3429 3430 3431 3432
}

static int decode_attr_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
{
A
Al Viro 已提交
3433
	__be32 *p;
3434
	int ret = 0;
L
Linus Torvalds 已提交
3435 3436 3437 3438 3439

	*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
3440 3441 3442
		p = xdr_inline_decode(xdr, 8);
		if (unlikely(!p))
			goto out_overflow;
3443
		xdr_decode_hyper(p, fileid);
L
Linus Torvalds 已提交
3444
		bitmap[0] &= ~FATTR4_WORD0_FILEID;
3445
		ret = NFS_ATTR_FATTR_FILEID;
L
Linus Torvalds 已提交
3446
	}
3447
	dprintk("%s: fileid=%Lu\n", __func__, (unsigned long long)*fileid);
3448
	return ret;
B
Benny Halevy 已提交
3449 3450 3451
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
L
Linus Torvalds 已提交
3452 3453
}

3454 3455
static int decode_attr_mounted_on_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
{
A
Al Viro 已提交
3456
	__be32 *p;
3457
	int ret = 0;
3458 3459 3460 3461 3462

	*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
3463 3464 3465
		p = xdr_inline_decode(xdr, 8);
		if (unlikely(!p))
			goto out_overflow;
3466
		xdr_decode_hyper(p, fileid);
3467
		bitmap[1] &= ~FATTR4_WORD1_MOUNTED_ON_FILEID;
3468
		ret = NFS_ATTR_FATTR_MOUNTED_ON_FILEID;
3469
	}
3470
	dprintk("%s: fileid=%Lu\n", __func__, (unsigned long long)*fileid);
3471
	return ret;
B
Benny Halevy 已提交
3472 3473 3474
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
3475 3476
}

L
Linus Torvalds 已提交
3477 3478
static int decode_attr_files_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
{
A
Al Viro 已提交
3479
	__be32 *p;
L
Linus Torvalds 已提交
3480 3481 3482 3483 3484 3485
	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
3486 3487 3488
		p = xdr_inline_decode(xdr, 8);
		if (unlikely(!p))
			goto out_overflow;
3489
		xdr_decode_hyper(p, res);
L
Linus Torvalds 已提交
3490 3491
		bitmap[0] &= ~FATTR4_WORD0_FILES_AVAIL;
	}
3492
	dprintk("%s: files avail=%Lu\n", __func__, (unsigned long long)*res);
L
Linus Torvalds 已提交
3493
	return status;
B
Benny Halevy 已提交
3494 3495 3496
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
L
Linus Torvalds 已提交
3497 3498 3499 3500
}

static int decode_attr_files_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
{
A
Al Viro 已提交
3501
	__be32 *p;
L
Linus Torvalds 已提交
3502 3503 3504 3505 3506 3507
	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
3508 3509 3510
		p = xdr_inline_decode(xdr, 8);
		if (unlikely(!p))
			goto out_overflow;
3511
		xdr_decode_hyper(p, res);
L
Linus Torvalds 已提交
3512 3513
		bitmap[0] &= ~FATTR4_WORD0_FILES_FREE;
	}
3514
	dprintk("%s: files free=%Lu\n", __func__, (unsigned long long)*res);
L
Linus Torvalds 已提交
3515
	return status;
B
Benny Halevy 已提交
3516 3517 3518
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
L
Linus Torvalds 已提交
3519 3520 3521 3522
}

static int decode_attr_files_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
{
A
Al Viro 已提交
3523
	__be32 *p;
L
Linus Torvalds 已提交
3524 3525 3526 3527 3528 3529
	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
3530 3531 3532
		p = xdr_inline_decode(xdr, 8);
		if (unlikely(!p))
			goto out_overflow;
3533
		xdr_decode_hyper(p, res);
L
Linus Torvalds 已提交
3534 3535
		bitmap[0] &= ~FATTR4_WORD0_FILES_TOTAL;
	}
3536
	dprintk("%s: files total=%Lu\n", __func__, (unsigned long long)*res);
L
Linus Torvalds 已提交
3537
	return status;
B
Benny Halevy 已提交
3538 3539 3540
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
L
Linus Torvalds 已提交
3541 3542
}

3543 3544
static int decode_pathname(struct xdr_stream *xdr, struct nfs4_pathname *path)
{
3545
	u32 n;
A
Al Viro 已提交
3546
	__be32 *p;
3547 3548
	int status = 0;

B
Benny Halevy 已提交
3549 3550 3551
	p = xdr_inline_decode(xdr, 4);
	if (unlikely(!p))
		goto out_overflow;
3552
	n = be32_to_cpup(p);
3553 3554
	if (n == 0)
		goto root_path;
3555
	dprintk("pathname4: ");
3556 3557 3558 3559 3560
	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++) {
3561 3562 3563 3564
		struct nfs4_string *component = &path->components[path->ncomponents];
		status = decode_opaque_inline(xdr, &component->len, &component->data);
		if (unlikely(status != 0))
			goto out_eio;
3565
		ifdebug (XDR)
3566 3567 3568
			pr_cont("%s%.*s ",
				(path->ncomponents != n ? "/ " : ""),
				component->len, component->data);
3569 3570 3571
	}
out:
	return status;
3572 3573 3574 3575 3576
root_path:
/* a root pathname is sent as a zero component4 */
	path->ncomponents = 1;
	path->components[0].len=0;
	path->components[0].data=NULL;
3577
	dprintk("pathname4: /\n");
3578
	goto out;
3579 3580 3581 3582
out_eio:
	dprintk(" status %d", status);
	status = -EIO;
	goto out;
B
Benny Halevy 已提交
3583 3584 3585
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
3586 3587 3588
}

static int decode_attr_fs_locations(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs4_fs_locations *res)
3589 3590
{
	int n;
A
Al Viro 已提交
3591
	__be32 *p;
3592 3593 3594 3595 3596 3597 3598
	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;
3599 3600 3601 3602
	status = -EIO;
	/* Ignore borken servers that return unrequested attrs */
	if (unlikely(res == NULL))
		goto out;
3603
	dprintk("%s: fsroot:\n", __func__);
3604
	status = decode_pathname(xdr, &res->fs_path);
3605 3606
	if (unlikely(status != 0))
		goto out;
B
Benny Halevy 已提交
3607 3608 3609
	p = xdr_inline_decode(xdr, 4);
	if (unlikely(!p))
		goto out_overflow;
3610
	n = be32_to_cpup(p);
3611 3612
	if (n <= 0)
		goto out_eio;
3613
	for (res->nlocations = 0; res->nlocations < n; res->nlocations++) {
3614
		u32 m;
3615
		struct nfs4_fs_location *loc;
3616

3617 3618 3619
		if (res->nlocations == NFS4_FS_LOCATIONS_MAXENTRIES)
			break;
		loc = &res->locations[res->nlocations];
B
Benny Halevy 已提交
3620 3621 3622
		p = xdr_inline_decode(xdr, 4);
		if (unlikely(!p))
			goto out_overflow;
3623
		m = be32_to_cpup(p);
3624

3625
		dprintk("%s: servers:\n", __func__);
3626 3627 3628 3629
		for (loc->nservers = 0; loc->nservers < m; loc->nservers++) {
			struct nfs4_string *server;

			if (loc->nservers == NFS4_FS_LOCATION_MAXSERVERS) {
3630 3631 3632
				unsigned int i;
				dprintk("%s: using first %u of %u servers "
					"returned for location %u\n",
3633
						__func__,
3634 3635
						NFS4_FS_LOCATION_MAXSERVERS,
						m, res->nlocations);
3636
				for (i = loc->nservers; i < m; i++) {
T
Trond Myklebust 已提交
3637
					unsigned int len;
3638 3639 3640 3641 3642
					char *data;
					status = decode_opaque_inline(xdr, &len, &data);
					if (unlikely(status != 0))
						goto out_eio;
				}
3643
				break;
3644
			}
3645 3646 3647 3648 3649
			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);
3650 3651
		}
		status = decode_pathname(xdr, &loc->rootpath);
3652 3653 3654
		if (unlikely(status != 0))
			goto out_eio;
	}
3655
	if (res->nlocations != 0)
3656
		status = NFS_ATTR_FATTR_V4_LOCATIONS;
3657
out:
3658
	dprintk("%s: fs_locations done, error = %d\n", __func__, status);
3659
	return status;
B
Benny Halevy 已提交
3660 3661
out_overflow:
	print_overflow_msg(__func__, xdr);
3662 3663 3664 3665 3666
out_eio:
	status = -EIO;
	goto out;
}

L
Linus Torvalds 已提交
3667 3668
static int decode_attr_maxfilesize(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
{
A
Al Viro 已提交
3669
	__be32 *p;
L
Linus Torvalds 已提交
3670 3671 3672 3673 3674 3675
	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
3676 3677 3678
		p = xdr_inline_decode(xdr, 8);
		if (unlikely(!p))
			goto out_overflow;
3679
		xdr_decode_hyper(p, res);
L
Linus Torvalds 已提交
3680 3681
		bitmap[0] &= ~FATTR4_WORD0_MAXFILESIZE;
	}
3682
	dprintk("%s: maxfilesize=%Lu\n", __func__, (unsigned long long)*res);
L
Linus Torvalds 已提交
3683
	return status;
B
Benny Halevy 已提交
3684 3685 3686
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
L
Linus Torvalds 已提交
3687 3688 3689 3690
}

static int decode_attr_maxlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxlink)
{
A
Al Viro 已提交
3691
	__be32 *p;
L
Linus Torvalds 已提交
3692 3693 3694 3695 3696 3697
	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
3698 3699 3700
		p = xdr_inline_decode(xdr, 4);
		if (unlikely(!p))
			goto out_overflow;
3701
		*maxlink = be32_to_cpup(p);
L
Linus Torvalds 已提交
3702 3703
		bitmap[0] &= ~FATTR4_WORD0_MAXLINK;
	}
3704
	dprintk("%s: maxlink=%u\n", __func__, *maxlink);
L
Linus Torvalds 已提交
3705
	return status;
B
Benny Halevy 已提交
3706 3707 3708
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
L
Linus Torvalds 已提交
3709 3710 3711 3712
}

static int decode_attr_maxname(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxname)
{
A
Al Viro 已提交
3713
	__be32 *p;
L
Linus Torvalds 已提交
3714 3715 3716 3717 3718 3719
	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
3720 3721 3722
		p = xdr_inline_decode(xdr, 4);
		if (unlikely(!p))
			goto out_overflow;
3723
		*maxname = be32_to_cpup(p);
L
Linus Torvalds 已提交
3724 3725
		bitmap[0] &= ~FATTR4_WORD0_MAXNAME;
	}
3726
	dprintk("%s: maxname=%u\n", __func__, *maxname);
L
Linus Torvalds 已提交
3727
	return status;
B
Benny Halevy 已提交
3728 3729 3730
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
L
Linus Torvalds 已提交
3731 3732 3733 3734
}

static int decode_attr_maxread(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
{
A
Al Viro 已提交
3735
	__be32 *p;
L
Linus Torvalds 已提交
3736 3737 3738 3739 3740 3741 3742
	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
3743 3744 3745
		p = xdr_inline_decode(xdr, 8);
		if (unlikely(!p))
			goto out_overflow;
3746
		xdr_decode_hyper(p, &maxread);
L
Linus Torvalds 已提交
3747 3748 3749 3750 3751
		if (maxread > 0x7FFFFFFF)
			maxread = 0x7FFFFFFF;
		*res = (uint32_t)maxread;
		bitmap[0] &= ~FATTR4_WORD0_MAXREAD;
	}
3752
	dprintk("%s: maxread=%lu\n", __func__, (unsigned long)*res);
L
Linus Torvalds 已提交
3753
	return status;
B
Benny Halevy 已提交
3754 3755 3756
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
L
Linus Torvalds 已提交
3757 3758 3759 3760
}

static int decode_attr_maxwrite(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
{
A
Al Viro 已提交
3761
	__be32 *p;
L
Linus Torvalds 已提交
3762 3763 3764 3765 3766 3767 3768
	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
3769 3770 3771
		p = xdr_inline_decode(xdr, 8);
		if (unlikely(!p))
			goto out_overflow;
3772
		xdr_decode_hyper(p, &maxwrite);
L
Linus Torvalds 已提交
3773 3774 3775 3776 3777
		if (maxwrite > 0x7FFFFFFF)
			maxwrite = 0x7FFFFFFF;
		*res = (uint32_t)maxwrite;
		bitmap[0] &= ~FATTR4_WORD0_MAXWRITE;
	}
3778
	dprintk("%s: maxwrite=%lu\n", __func__, (unsigned long)*res);
L
Linus Torvalds 已提交
3779
	return status;
B
Benny Halevy 已提交
3780 3781 3782
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
L
Linus Torvalds 已提交
3783 3784
}

3785
static int decode_attr_mode(struct xdr_stream *xdr, uint32_t *bitmap, umode_t *mode)
L
Linus Torvalds 已提交
3786
{
3787
	uint32_t tmp;
A
Al Viro 已提交
3788
	__be32 *p;
3789
	int ret = 0;
L
Linus Torvalds 已提交
3790 3791 3792 3793 3794

	*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
3795 3796 3797
		p = xdr_inline_decode(xdr, 4);
		if (unlikely(!p))
			goto out_overflow;
3798
		tmp = be32_to_cpup(p);
3799
		*mode = tmp & ~S_IFMT;
L
Linus Torvalds 已提交
3800
		bitmap[1] &= ~FATTR4_WORD1_MODE;
3801
		ret = NFS_ATTR_FATTR_MODE;
L
Linus Torvalds 已提交
3802
	}
3803
	dprintk("%s: file mode=0%o\n", __func__, (unsigned int)*mode);
3804
	return ret;
B
Benny Halevy 已提交
3805 3806 3807
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
L
Linus Torvalds 已提交
3808 3809 3810 3811
}

static int decode_attr_nlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *nlink)
{
A
Al Viro 已提交
3812
	__be32 *p;
3813
	int ret = 0;
L
Linus Torvalds 已提交
3814 3815 3816 3817 3818

	*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
3819 3820 3821
		p = xdr_inline_decode(xdr, 4);
		if (unlikely(!p))
			goto out_overflow;
3822
		*nlink = be32_to_cpup(p);
L
Linus Torvalds 已提交
3823
		bitmap[1] &= ~FATTR4_WORD1_NUMLINKS;
3824
		ret = NFS_ATTR_FATTR_NLINK;
L
Linus Torvalds 已提交
3825
	}
3826
	dprintk("%s: nlink=%u\n", __func__, (unsigned int)*nlink);
3827
	return ret;
B
Benny Halevy 已提交
3828 3829 3830
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
L
Linus Torvalds 已提交
3831 3832
}

3833
static int decode_attr_owner(struct xdr_stream *xdr, uint32_t *bitmap,
3834
		const struct nfs_server *server, kuid_t *uid,
3835
		struct nfs4_string *owner_name)
L
Linus Torvalds 已提交
3836
{
A
Al Viro 已提交
3837 3838
	uint32_t len;
	__be32 *p;
3839
	int ret = 0;
L
Linus Torvalds 已提交
3840

3841
	*uid = make_kuid(&init_user_ns, -2);
L
Linus Torvalds 已提交
3842 3843 3844
	if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER - 1U)))
		return -EIO;
	if (likely(bitmap[1] & FATTR4_WORD1_OWNER)) {
B
Benny Halevy 已提交
3845 3846 3847
		p = xdr_inline_decode(xdr, 4);
		if (unlikely(!p))
			goto out_overflow;
3848
		len = be32_to_cpup(p);
B
Benny Halevy 已提交
3849 3850 3851
		p = xdr_inline_decode(xdr, len);
		if (unlikely(!p))
			goto out_overflow;
3852 3853 3854 3855 3856 3857
		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;
			}
3858
		} else if (len < XDR_MAX_NETOBJ) {
3859
			if (nfs_map_name_to_uid(server, (char *)p, len, uid) == 0)
3860 3861
				ret = NFS_ATTR_FATTR_OWNER;
			else
L
Linus Torvalds 已提交
3862
				dprintk("%s: nfs_map_name_to_uid failed!\n",
3863
						__func__);
L
Linus Torvalds 已提交
3864
		} else
3865
			dprintk("%s: name too long (%u)!\n",
3866
					__func__, len);
L
Linus Torvalds 已提交
3867 3868
		bitmap[1] &= ~FATTR4_WORD1_OWNER;
	}
3869
	dprintk("%s: uid=%d\n", __func__, (int)from_kuid(&init_user_ns, *uid));
3870
	return ret;
B
Benny Halevy 已提交
3871 3872 3873
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
L
Linus Torvalds 已提交
3874 3875
}

3876
static int decode_attr_group(struct xdr_stream *xdr, uint32_t *bitmap,
3877
		const struct nfs_server *server, kgid_t *gid,
3878
		struct nfs4_string *group_name)
L
Linus Torvalds 已提交
3879
{
A
Al Viro 已提交
3880 3881
	uint32_t len;
	__be32 *p;
3882
	int ret = 0;
L
Linus Torvalds 已提交
3883

3884
	*gid = make_kgid(&init_user_ns, -2);
L
Linus Torvalds 已提交
3885 3886 3887
	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
3888 3889 3890
		p = xdr_inline_decode(xdr, 4);
		if (unlikely(!p))
			goto out_overflow;
3891
		len = be32_to_cpup(p);
B
Benny Halevy 已提交
3892 3893 3894
		p = xdr_inline_decode(xdr, len);
		if (unlikely(!p))
			goto out_overflow;
3895 3896 3897 3898 3899 3900
		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;
			}
3901
		} else if (len < XDR_MAX_NETOBJ) {
3902
			if (nfs_map_group_to_gid(server, (char *)p, len, gid) == 0)
3903 3904
				ret = NFS_ATTR_FATTR_GROUP;
			else
L
Linus Torvalds 已提交
3905
				dprintk("%s: nfs_map_group_to_gid failed!\n",
3906
						__func__);
L
Linus Torvalds 已提交
3907
		} else
3908
			dprintk("%s: name too long (%u)!\n",
3909
					__func__, len);
L
Linus Torvalds 已提交
3910 3911
		bitmap[1] &= ~FATTR4_WORD1_OWNER_GROUP;
	}
3912
	dprintk("%s: gid=%d\n", __func__, (int)from_kgid(&init_user_ns, *gid));
3913
	return ret;
B
Benny Halevy 已提交
3914 3915 3916
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
L
Linus Torvalds 已提交
3917 3918 3919 3920
}

static int decode_attr_rdev(struct xdr_stream *xdr, uint32_t *bitmap, dev_t *rdev)
{
A
Al Viro 已提交
3921 3922
	uint32_t major = 0, minor = 0;
	__be32 *p;
3923
	int ret = 0;
L
Linus Torvalds 已提交
3924 3925 3926 3927 3928 3929 3930

	*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
3931 3932 3933
		p = xdr_inline_decode(xdr, 8);
		if (unlikely(!p))
			goto out_overflow;
B
Benny Halevy 已提交
3934
		major = be32_to_cpup(p++);
3935
		minor = be32_to_cpup(p);
L
Linus Torvalds 已提交
3936 3937 3938 3939
		tmp = MKDEV(major, minor);
		if (MAJOR(tmp) == major && MINOR(tmp) == minor)
			*rdev = tmp;
		bitmap[1] &= ~ FATTR4_WORD1_RAWDEV;
3940
		ret = NFS_ATTR_FATTR_RDEV;
L
Linus Torvalds 已提交
3941
	}
3942
	dprintk("%s: rdev=(0x%x:0x%x)\n", __func__, major, minor);
3943
	return ret;
B
Benny Halevy 已提交
3944 3945 3946
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
L
Linus Torvalds 已提交
3947 3948 3949 3950
}

static int decode_attr_space_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
{
A
Al Viro 已提交
3951
	__be32 *p;
L
Linus Torvalds 已提交
3952 3953 3954 3955 3956 3957
	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
3958 3959 3960
		p = xdr_inline_decode(xdr, 8);
		if (unlikely(!p))
			goto out_overflow;
3961
		xdr_decode_hyper(p, res);
L
Linus Torvalds 已提交
3962 3963
		bitmap[1] &= ~FATTR4_WORD1_SPACE_AVAIL;
	}
3964
	dprintk("%s: space avail=%Lu\n", __func__, (unsigned long long)*res);
L
Linus Torvalds 已提交
3965
	return status;
B
Benny Halevy 已提交
3966 3967 3968
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
L
Linus Torvalds 已提交
3969 3970 3971 3972
}

static int decode_attr_space_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
{
A
Al Viro 已提交
3973
	__be32 *p;
L
Linus Torvalds 已提交
3974 3975 3976 3977 3978 3979
	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
3980 3981 3982
		p = xdr_inline_decode(xdr, 8);
		if (unlikely(!p))
			goto out_overflow;
3983
		xdr_decode_hyper(p, res);
L
Linus Torvalds 已提交
3984 3985
		bitmap[1] &= ~FATTR4_WORD1_SPACE_FREE;
	}
3986
	dprintk("%s: space free=%Lu\n", __func__, (unsigned long long)*res);
L
Linus Torvalds 已提交
3987
	return status;
B
Benny Halevy 已提交
3988 3989 3990
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
L
Linus Torvalds 已提交
3991 3992 3993 3994
}

static int decode_attr_space_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
{
A
Al Viro 已提交
3995
	__be32 *p;
L
Linus Torvalds 已提交
3996 3997 3998 3999 4000 4001
	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
4002 4003 4004
		p = xdr_inline_decode(xdr, 8);
		if (unlikely(!p))
			goto out_overflow;
4005
		xdr_decode_hyper(p, res);
L
Linus Torvalds 已提交
4006 4007
		bitmap[1] &= ~FATTR4_WORD1_SPACE_TOTAL;
	}
4008
	dprintk("%s: space total=%Lu\n", __func__, (unsigned long long)*res);
L
Linus Torvalds 已提交
4009
	return status;
B
Benny Halevy 已提交
4010 4011 4012
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
L
Linus Torvalds 已提交
4013 4014 4015 4016
}

static int decode_attr_space_used(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *used)
{
A
Al Viro 已提交
4017
	__be32 *p;
4018
	int ret = 0;
L
Linus Torvalds 已提交
4019 4020 4021 4022 4023

	*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
4024 4025 4026
		p = xdr_inline_decode(xdr, 8);
		if (unlikely(!p))
			goto out_overflow;
4027
		xdr_decode_hyper(p, used);
L
Linus Torvalds 已提交
4028
		bitmap[1] &= ~FATTR4_WORD1_SPACE_USED;
4029
		ret = NFS_ATTR_FATTR_SPACE_USED;
L
Linus Torvalds 已提交
4030
	}
4031
	dprintk("%s: space used=%Lu\n", __func__,
L
Linus Torvalds 已提交
4032
			(unsigned long long)*used);
4033
	return ret;
B
Benny Halevy 已提交
4034 4035 4036
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
L
Linus Torvalds 已提交
4037 4038 4039 4040
}

static int decode_attr_time(struct xdr_stream *xdr, struct timespec *time)
{
A
Al Viro 已提交
4041
	__be32 *p;
L
Linus Torvalds 已提交
4042 4043 4044
	uint64_t sec;
	uint32_t nsec;

B
Benny Halevy 已提交
4045 4046 4047
	p = xdr_inline_decode(xdr, 12);
	if (unlikely(!p))
		goto out_overflow;
B
Benny Halevy 已提交
4048
	p = xdr_decode_hyper(p, &sec);
4049
	nsec = be32_to_cpup(p);
L
Linus Torvalds 已提交
4050 4051 4052
	time->tv_sec = (time_t)sec;
	time->tv_nsec = (long)nsec;
	return 0;
B
Benny Halevy 已提交
4053 4054 4055
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
L
Linus Torvalds 已提交
4056 4057 4058 4059 4060 4061 4062 4063 4064 4065 4066 4067
}

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);
4068 4069
		if (status == 0)
			status = NFS_ATTR_FATTR_ATIME;
L
Linus Torvalds 已提交
4070 4071
		bitmap[1] &= ~FATTR4_WORD1_TIME_ACCESS;
	}
4072
	dprintk("%s: atime=%ld\n", __func__, (long)time->tv_sec);
L
Linus Torvalds 已提交
4073 4074 4075 4076 4077 4078 4079 4080 4081 4082 4083 4084 4085
	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);
4086 4087
		if (status == 0)
			status = NFS_ATTR_FATTR_CTIME;
L
Linus Torvalds 已提交
4088 4089
		bitmap[1] &= ~FATTR4_WORD1_TIME_METADATA;
	}
4090
	dprintk("%s: ctime=%ld\n", __func__, (long)time->tv_sec);
L
Linus Torvalds 已提交
4091 4092 4093
	return status;
}

4094 4095 4096 4097 4098 4099 4100 4101 4102 4103 4104 4105 4106 4107 4108 4109 4110 4111
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;
}

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 4142 4143 4144 4145 4146 4147 4148 4149 4150 4151 4152 4153 4154 4155 4156 4157 4158 4159 4160 4161
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
4162 4163 4164 4165 4166 4167 4168 4169 4170 4171
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);
4172 4173
		if (status == 0)
			status = NFS_ATTR_FATTR_MTIME;
L
Linus Torvalds 已提交
4174 4175
		bitmap[1] &= ~FATTR4_WORD1_TIME_MODIFY;
	}
4176
	dprintk("%s: mtime=%ld\n", __func__, (long)time->tv_sec);
L
Linus Torvalds 已提交
4177 4178 4179
	return status;
}

4180
static int verify_attr_len(struct xdr_stream *xdr, unsigned int savep, uint32_t attrlen)
L
Linus Torvalds 已提交
4181 4182
{
	unsigned int attrwords = XDR_QUADLEN(attrlen);
4183
	unsigned int nwords = (xdr_stream_pos(xdr) - savep) >> 2;
L
Linus Torvalds 已提交
4184 4185

	if (unlikely(attrwords != nwords)) {
4186 4187
		dprintk("%s: server returned incorrect attribute length: "
			"%u %c %u\n",
4188
				__func__,
L
Linus Torvalds 已提交
4189 4190 4191 4192 4193 4194 4195 4196 4197 4198
				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
4199
	__be32 *p;
L
Linus Torvalds 已提交
4200

B
Benny Halevy 已提交
4201 4202 4203
	p = xdr_inline_decode(xdr, 20);
	if (unlikely(!p))
		goto out_overflow;
B
Benny Halevy 已提交
4204
	cinfo->atomic = be32_to_cpup(p++);
B
Benny Halevy 已提交
4205
	p = xdr_decode_hyper(p, &cinfo->before);
4206
	xdr_decode_hyper(p, &cinfo->after);
L
Linus Torvalds 已提交
4207
	return 0;
B
Benny Halevy 已提交
4208 4209 4210
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
L
Linus Torvalds 已提交
4211 4212
}

4213
static int decode_access(struct xdr_stream *xdr, u32 *supported, u32 *access)
L
Linus Torvalds 已提交
4214
{
A
Al Viro 已提交
4215
	__be32 *p;
L
Linus Torvalds 已提交
4216 4217 4218 4219 4220 4221
	uint32_t supp, acc;
	int status;

	status = decode_op_hdr(xdr, OP_ACCESS);
	if (status)
		return status;
B
Benny Halevy 已提交
4222 4223 4224
	p = xdr_inline_decode(xdr, 8);
	if (unlikely(!p))
		goto out_overflow;
B
Benny Halevy 已提交
4225
	supp = be32_to_cpup(p++);
4226
	acc = be32_to_cpup(p);
4227 4228
	*supported = supp;
	*access = acc;
L
Linus Torvalds 已提交
4229
	return 0;
B
Benny Halevy 已提交
4230 4231 4232
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
L
Linus Torvalds 已提交
4233 4234
}

4235
static int decode_opaque_fixed(struct xdr_stream *xdr, void *buf, size_t len)
L
Linus Torvalds 已提交
4236
{
A
Al Viro 已提交
4237
	__be32 *p;
4238 4239 4240 4241 4242 4243 4244 4245 4246 4247 4248 4249

	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)
{
4250
	return decode_opaque_fixed(xdr, stateid, NFS4_STATEID_SIZE);
4251 4252 4253 4254
}

static int decode_close(struct xdr_stream *xdr, struct nfs_closeres *res)
{
L
Linus Torvalds 已提交
4255 4256 4257
	int status;

	status = decode_op_hdr(xdr, OP_CLOSE);
4258 4259
	if (status != -EIO)
		nfs_increment_open_seqid(status, res->seqid);
4260 4261 4262
	if (!status)
		status = decode_stateid(xdr, &res->stateid);
	return status;
L
Linus Torvalds 已提交
4263 4264
}

4265 4266
static int decode_verifier(struct xdr_stream *xdr, void *verifier)
{
4267
	return decode_opaque_fixed(xdr, verifier, NFS4_VERIFIER_SIZE);
L
Linus Torvalds 已提交
4268 4269
}

4270 4271 4272 4273 4274
static int decode_write_verifier(struct xdr_stream *xdr, struct nfs_write_verifier *verifier)
{
	return decode_opaque_fixed(xdr, verifier->data, NFS4_VERIFIER_SIZE);
}

4275
static int decode_commit(struct xdr_stream *xdr, struct nfs_commitres *res)
L
Linus Torvalds 已提交
4276 4277 4278 4279
{
	int status;

	status = decode_op_hdr(xdr, OP_COMMIT);
4280
	if (!status)
4281
		status = decode_write_verifier(xdr, &res->verf->verifier);
4282
	return status;
L
Linus Torvalds 已提交
4283 4284 4285 4286
}

static int decode_create(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
{
A
Al Viro 已提交
4287
	__be32 *p;
L
Linus Torvalds 已提交
4288 4289 4290 4291 4292 4293 4294 4295
	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
4296 4297 4298
	p = xdr_inline_decode(xdr, 4);
	if (unlikely(!p))
		goto out_overflow;
4299
	bmlen = be32_to_cpup(p);
B
Benny Halevy 已提交
4300 4301 4302 4303 4304 4305
	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
4306 4307 4308 4309
}

static int decode_server_caps(struct xdr_stream *xdr, struct nfs4_server_caps_res *res)
{
4310
	unsigned int savep;
4311
	uint32_t attrlen, bitmap[3] = {0};
L
Linus Torvalds 已提交
4312 4313 4314 4315 4316 4317 4318 4319 4320 4321
	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;
4322 4323 4324
	if ((status = decode_attr_fh_expire_type(xdr, bitmap,
						 &res->fh_expire_type)) != 0)
		goto xdr_error;
L
Linus Torvalds 已提交
4325 4326 4327 4328 4329 4330 4331 4332
	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:
4333
	dprintk("%s: xdr returned %d!\n", __func__, -status);
L
Linus Torvalds 已提交
4334 4335
	return status;
}
4336

L
Linus Torvalds 已提交
4337 4338
static int decode_statfs(struct xdr_stream *xdr, struct nfs_fsstat *fsstat)
{
4339
	unsigned int savep;
4340
	uint32_t attrlen, bitmap[3] = {0};
L
Linus Torvalds 已提交
4341
	int status;
4342

L
Linus Torvalds 已提交
4343 4344 4345 4346 4347 4348 4349 4350 4351 4352 4353 4354 4355 4356 4357 4358 4359 4360 4361 4362 4363 4364
	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:
4365
	dprintk("%s: xdr returned %d!\n", __func__, -status);
L
Linus Torvalds 已提交
4366 4367 4368 4369 4370
	return status;
}

static int decode_pathconf(struct xdr_stream *xdr, struct nfs_pathconf *pathconf)
{
4371
	unsigned int savep;
4372
	uint32_t attrlen, bitmap[3] = {0};
L
Linus Torvalds 已提交
4373
	int status;
4374

L
Linus Torvalds 已提交
4375 4376 4377 4378 4379 4380 4381 4382 4383 4384 4385 4386 4387 4388
	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:
4389
	dprintk("%s: xdr returned %d!\n", __func__, -status);
L
Linus Torvalds 已提交
4390 4391 4392
	return status;
}

4393 4394 4395 4396 4397 4398 4399 4400 4401 4402 4403 4404 4405 4406 4407 4408 4409 4410 4411 4412 4413 4414 4415
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)
{
4416 4417
	__be32 *p;
	unsigned int savep;
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 4458 4459 4460 4461 4462 4463 4464 4465 4466 4467 4468 4469 4470 4471 4472 4473 4474 4475 4476 4477
	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;
4478
	if (bitmap[2] & FATTR4_WORD2_MDSTHRESHOLD) {
4479 4480 4481
		/* Did the server return an unrequested attribute? */
		if (unlikely(res == NULL))
			return -EREMOTEIO;
4482 4483 4484 4485 4486 4487 4488 4489 4490 4491 4492 4493
		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);
4494
		bitmap[2] &= ~FATTR4_WORD2_MDSTHRESHOLD;
4495 4496 4497 4498 4499 4500 4501
	}
	return status;
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
}

4502 4503
static int decode_getfattr_attrs(struct xdr_stream *xdr, uint32_t *bitmap,
		struct nfs_fattr *fattr, struct nfs_fh *fh,
4504
		struct nfs4_fs_locations *fs_loc, struct nfs4_label *label,
4505
		const struct nfs_server *server)
L
Linus Torvalds 已提交
4506
{
4507 4508
	int status;
	umode_t fmode = 0;
4509
	uint32_t type;
4510
	int32_t err;
L
Linus Torvalds 已提交
4511

4512 4513
	status = decode_attr_type(xdr, bitmap, &type);
	if (status < 0)
L
Linus Torvalds 已提交
4514
		goto xdr_error;
4515 4516 4517 4518 4519
	fattr->mode = 0;
	if (status != 0) {
		fattr->mode |= nfs_type2fmt[type];
		fattr->valid |= status;
	}
L
Linus Torvalds 已提交
4520

4521 4522
	status = decode_attr_change(xdr, bitmap, &fattr->change_attr);
	if (status < 0)
L
Linus Torvalds 已提交
4523
		goto xdr_error;
4524
	fattr->valid |= status;
4525 4526 4527

	status = decode_attr_size(xdr, bitmap, &fattr->size);
	if (status < 0)
L
Linus Torvalds 已提交
4528
		goto xdr_error;
4529
	fattr->valid |= status;
4530 4531 4532

	status = decode_attr_fsid(xdr, bitmap, &fattr->fsid);
	if (status < 0)
L
Linus Torvalds 已提交
4533
		goto xdr_error;
4534
	fattr->valid |= status;
4535

4536 4537
	err = 0;
	status = decode_attr_error(xdr, bitmap, &err);
4538 4539 4540 4541 4542 4543 4544
	if (status < 0)
		goto xdr_error;

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

4545 4546
	status = decode_attr_fileid(xdr, bitmap, &fattr->fileid);
	if (status < 0)
L
Linus Torvalds 已提交
4547
		goto xdr_error;
4548
	fattr->valid |= status;
4549

4550
	status = decode_attr_fs_locations(xdr, bitmap, fs_loc);
4551
	if (status < 0)
4552
		goto xdr_error;
4553
	fattr->valid |= status;
4554 4555 4556

	status = decode_attr_mode(xdr, bitmap, &fmode);
	if (status < 0)
L
Linus Torvalds 已提交
4557
		goto xdr_error;
4558 4559 4560 4561
	if (status != 0) {
		fattr->mode |= fmode;
		fattr->valid |= status;
	}
4562 4563 4564

	status = decode_attr_nlink(xdr, bitmap, &fattr->nlink);
	if (status < 0)
L
Linus Torvalds 已提交
4565
		goto xdr_error;
4566
	fattr->valid |= status;
4567

4568
	status = decode_attr_owner(xdr, bitmap, server, &fattr->uid, fattr->owner_name);
4569
	if (status < 0)
L
Linus Torvalds 已提交
4570
		goto xdr_error;
4571
	fattr->valid |= status;
4572

4573
	status = decode_attr_group(xdr, bitmap, server, &fattr->gid, fattr->group_name);
4574
	if (status < 0)
L
Linus Torvalds 已提交
4575
		goto xdr_error;
4576
	fattr->valid |= status;
4577 4578 4579

	status = decode_attr_rdev(xdr, bitmap, &fattr->rdev);
	if (status < 0)
L
Linus Torvalds 已提交
4580
		goto xdr_error;
4581
	fattr->valid |= status;
4582 4583 4584

	status = decode_attr_space_used(xdr, bitmap, &fattr->du.nfs3.used);
	if (status < 0)
L
Linus Torvalds 已提交
4585
		goto xdr_error;
4586
	fattr->valid |= status;
4587 4588 4589

	status = decode_attr_time_access(xdr, bitmap, &fattr->atime);
	if (status < 0)
L
Linus Torvalds 已提交
4590
		goto xdr_error;
4591
	fattr->valid |= status;
4592 4593 4594

	status = decode_attr_time_metadata(xdr, bitmap, &fattr->ctime);
	if (status < 0)
L
Linus Torvalds 已提交
4595
		goto xdr_error;
4596
	fattr->valid |= status;
4597 4598 4599

	status = decode_attr_time_modify(xdr, bitmap, &fattr->mtime);
	if (status < 0)
L
Linus Torvalds 已提交
4600
		goto xdr_error;
4601
	fattr->valid |= status;
4602

4603
	status = decode_attr_mounted_on_fileid(xdr, bitmap, &fattr->mounted_on_fileid);
4604
	if (status < 0)
4605
		goto xdr_error;
4606
	fattr->valid |= status;
4607

4608 4609 4610 4611
	status = decode_attr_mdsthreshold(xdr, bitmap, fattr->mdsthreshold);
	if (status < 0)
		goto xdr_error;

4612 4613 4614 4615 4616 4617 4618
	if (label) {
		status = decode_attr_security_label(xdr, bitmap, label);
		if (status < 0)
			goto xdr_error;
		fattr->valid |= status;
	}

4619 4620 4621 4622 4623 4624
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,
4625
		struct nfs_fh *fh, struct nfs4_fs_locations *fs_loc,
4626
		struct nfs4_label *label, const struct nfs_server *server)
4627
{
4628
	unsigned int savep;
4629
	uint32_t attrlen,
4630
		 bitmap[3] = {0};
4631 4632 4633 4634 4635 4636 4637 4638 4639 4640 4641 4642 4643 4644
	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;

4645 4646
	status = decode_getfattr_attrs(xdr, bitmap, fattr, fh, fs_loc,
					label, server);
4647 4648 4649
	if (status < 0)
		goto xdr_error;

4650
	status = verify_attr_len(xdr, savep, attrlen);
L
Linus Torvalds 已提交
4651
xdr_error:
4652
	dprintk("%s: xdr returned %d\n", __func__, -status);
L
Linus Torvalds 已提交
4653 4654 4655
	return status;
}

4656 4657 4658 4659 4660 4661
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);
}

4662
static int decode_getfattr(struct xdr_stream *xdr, struct nfs_fattr *fattr,
4663
		const struct nfs_server *server)
4664
{
4665
	return decode_getfattr_generic(xdr, fattr, NULL, NULL, NULL, server);
4666
}
L
Linus Torvalds 已提交
4667

4668 4669 4670 4671 4672 4673 4674
/*
 * 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)
{
4675
	__be32 *p;
4676 4677 4678 4679 4680 4681 4682 4683 4684 4685 4686 4687 4688
	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)
4689 4690
		printk(KERN_INFO "NFS: %s: Warning: Multiple pNFS layout "
			"drivers per filesystem not supported\n", __func__);
4691 4692 4693 4694 4695 4696 4697 4698 4699 4700 4701 4702 4703 4704 4705 4706 4707 4708 4709 4710 4711 4712 4713 4714 4715 4716 4717 4718 4719 4720 4721 4722

	/* 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;
}

4723 4724 4725 4726 4727 4728 4729 4730 4731 4732 4733 4734 4735 4736 4737 4738 4739 4740 4741 4742 4743 4744
/*
 * 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
4745 4746
static int decode_fsinfo(struct xdr_stream *xdr, struct nfs_fsinfo *fsinfo)
{
4747
	unsigned int savep;
4748
	uint32_t attrlen, bitmap[3];
L
Linus Torvalds 已提交
4749 4750 4751 4752 4753 4754 4755 4756 4757 4758 4759 4760 4761 4762 4763 4764 4765 4766 4767 4768 4769
	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;
4770
	status = decode_attr_time_delta(xdr, bitmap, &fsinfo->time_delta);
4771 4772 4773
	if (status != 0)
		goto xdr_error;
	status = decode_attr_pnfstype(xdr, bitmap, &fsinfo->layouttype);
4774 4775
	if (status != 0)
		goto xdr_error;
4776 4777 4778
	status = decode_attr_layout_blksize(xdr, bitmap, &fsinfo->blksize);
	if (status)
		goto xdr_error;
L
Linus Torvalds 已提交
4779 4780 4781

	status = verify_attr_len(xdr, savep, attrlen);
xdr_error:
4782
	dprintk("%s: xdr returned %d!\n", __func__, -status);
L
Linus Torvalds 已提交
4783 4784 4785 4786 4787
	return status;
}

static int decode_getfh(struct xdr_stream *xdr, struct nfs_fh *fh)
{
A
Al Viro 已提交
4788
	__be32 *p;
L
Linus Torvalds 已提交
4789 4790 4791
	uint32_t len;
	int status;

4792 4793 4794
	/* Zero handle first to allow comparisons */
	memset(fh, 0, sizeof(*fh));

L
Linus Torvalds 已提交
4795 4796 4797 4798
	status = decode_op_hdr(xdr, OP_GETFH);
	if (status)
		return status;

B
Benny Halevy 已提交
4799 4800 4801
	p = xdr_inline_decode(xdr, 4);
	if (unlikely(!p))
		goto out_overflow;
4802
	len = be32_to_cpup(p);
L
Linus Torvalds 已提交
4803 4804 4805
	if (len > NFS4_FHSIZE)
		return -EIO;
	fh->size = len;
B
Benny Halevy 已提交
4806 4807 4808
	p = xdr_inline_decode(xdr, len);
	if (unlikely(!p))
		goto out_overflow;
B
Benny Halevy 已提交
4809
	memcpy(fh->data, p, len);
L
Linus Torvalds 已提交
4810
	return 0;
B
Benny Halevy 已提交
4811 4812 4813
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
L
Linus Torvalds 已提交
4814 4815 4816 4817 4818
}

static int decode_link(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
{
	int status;
4819

L
Linus Torvalds 已提交
4820 4821 4822 4823 4824 4825 4826 4827 4828
	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
4829
static int decode_lock_denied (struct xdr_stream *xdr, struct file_lock *fl)
L
Linus Torvalds 已提交
4830
{
T
Trond Myklebust 已提交
4831
	uint64_t offset, length, clientid;
A
Al Viro 已提交
4832
	__be32 *p;
T
Trond Myklebust 已提交
4833
	uint32_t namelen, type;
L
Linus Torvalds 已提交
4834

4835
	p = xdr_inline_decode(xdr, 32); /* read 32 bytes */
B
Benny Halevy 已提交
4836 4837
	if (unlikely(!p))
		goto out_overflow;
4838
	p = xdr_decode_hyper(p, &offset); /* read 2 8-byte long words */
B
Benny Halevy 已提交
4839
	p = xdr_decode_hyper(p, &length);
4840 4841
	type = be32_to_cpup(p++); /* 4 byte read */
	if (fl != NULL) { /* manipulate file lock */
T
Trond Myklebust 已提交
4842 4843 4844 4845 4846 4847 4848 4849 4850
		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;
	}
4851 4852 4853
	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
4854 4855 4856 4857 4858
	if (likely(p))
		return -NFS4ERR_DENIED;
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
L
Linus Torvalds 已提交
4859 4860
}

T
Trond Myklebust 已提交
4861
static int decode_lock(struct xdr_stream *xdr, struct nfs_lock_res *res)
L
Linus Torvalds 已提交
4862 4863 4864 4865
{
	int status;

	status = decode_op_hdr(xdr, OP_LOCK);
4866 4867
	if (status == -EIO)
		goto out;
L
Linus Torvalds 已提交
4868
	if (status == 0) {
4869 4870 4871
		status = decode_stateid(xdr, &res->stateid);
		if (unlikely(status))
			goto out;
L
Linus Torvalds 已提交
4872
	} else if (status == -NFS4ERR_DENIED)
4873 4874 4875 4876 4877
		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
4878 4879 4880
	return status;
}

T
Trond Myklebust 已提交
4881
static int decode_lockt(struct xdr_stream *xdr, struct nfs_lockt_res *res)
L
Linus Torvalds 已提交
4882 4883 4884 4885
{
	int status;
	status = decode_op_hdr(xdr, OP_LOCKT);
	if (status == -NFS4ERR_DENIED)
T
Trond Myklebust 已提交
4886
		return decode_lock_denied(xdr, res->denied);
L
Linus Torvalds 已提交
4887 4888 4889
	return status;
}

T
Trond Myklebust 已提交
4890
static int decode_locku(struct xdr_stream *xdr, struct nfs_locku_res *res)
L
Linus Torvalds 已提交
4891 4892 4893 4894
{
	int status;

	status = decode_op_hdr(xdr, OP_LOCKU);
4895 4896
	if (status != -EIO)
		nfs_increment_lock_seqid(status, res->seqid);
4897 4898
	if (status == 0)
		status = decode_stateid(xdr, &res->stateid);
L
Linus Torvalds 已提交
4899 4900 4901
	return status;
}

4902 4903 4904 4905 4906
static int decode_release_lockowner(struct xdr_stream *xdr)
{
	return decode_op_hdr(xdr, OP_RELEASE_LOCKOWNER);
}

L
Linus Torvalds 已提交
4907 4908 4909 4910 4911 4912 4913 4914
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
4915
	__be32 *p;
L
Linus Torvalds 已提交
4916 4917
	uint32_t limit_type, nblocks, blocksize;

B
Benny Halevy 已提交
4918 4919 4920
	p = xdr_inline_decode(xdr, 12);
	if (unlikely(!p))
		goto out_overflow;
B
Benny Halevy 已提交
4921
	limit_type = be32_to_cpup(p++);
L
Linus Torvalds 已提交
4922
	switch (limit_type) {
A
Andy Adamson 已提交
4923
	case 1:
4924
		xdr_decode_hyper(p, maxsize);
A
Andy Adamson 已提交
4925 4926
		break;
	case 2:
B
Benny Halevy 已提交
4927
		nblocks = be32_to_cpup(p++);
4928
		blocksize = be32_to_cpup(p);
A
Andy Adamson 已提交
4929
		*maxsize = (uint64_t)nblocks * (uint64_t)blocksize;
L
Linus Torvalds 已提交
4930 4931
	}
	return 0;
B
Benny Halevy 已提交
4932 4933 4934
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
L
Linus Torvalds 已提交
4935 4936 4937 4938
}

static int decode_delegation(struct xdr_stream *xdr, struct nfs_openres *res)
{
A
Andy Adamson 已提交
4939 4940
	__be32 *p;
	uint32_t delegation_type;
4941
	int status;
L
Linus Torvalds 已提交
4942

B
Benny Halevy 已提交
4943 4944 4945
	p = xdr_inline_decode(xdr, 4);
	if (unlikely(!p))
		goto out_overflow;
4946
	delegation_type = be32_to_cpup(p);
L
Linus Torvalds 已提交
4947 4948 4949 4950
	if (delegation_type == NFS4_OPEN_DELEGATE_NONE) {
		res->delegation_type = 0;
		return 0;
	}
4951 4952 4953
	status = decode_stateid(xdr, &res->delegation);
	if (unlikely(status))
		return status;
B
Benny Halevy 已提交
4954 4955 4956
	p = xdr_inline_decode(xdr, 4);
	if (unlikely(!p))
		goto out_overflow;
4957
	res->do_recall = be32_to_cpup(p);
A
Andy Adamson 已提交
4958

L
Linus Torvalds 已提交
4959
	switch (delegation_type) {
A
Andy Adamson 已提交
4960 4961 4962 4963 4964 4965
	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
4966 4967
				return -EIO;
	}
4968
	return decode_ace(xdr, NULL, res->server->nfs_client);
B
Benny Halevy 已提交
4969 4970 4971
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
L
Linus Torvalds 已提交
4972 4973 4974 4975
}

static int decode_open(struct xdr_stream *xdr, struct nfs_openres *res)
{
A
Andy Adamson 已提交
4976
	__be32 *p;
4977
	uint32_t savewords, bmlen, i;
A
Andy Adamson 已提交
4978
	int status;
L
Linus Torvalds 已提交
4979

4980 4981 4982 4983 4984 4985
	if (!__decode_op_hdr(xdr, OP_OPEN, &status))
		return status;
	nfs_increment_open_seqid(status, res->seqid);
	if (status)
		return status;
	status = decode_stateid(xdr, &res->stateid);
4986
	if (unlikely(status))
A
Andy Adamson 已提交
4987
		return status;
L
Linus Torvalds 已提交
4988

A
Andy Adamson 已提交
4989
	decode_change_info(xdr, &res->cinfo);
L
Linus Torvalds 已提交
4990

B
Benny Halevy 已提交
4991 4992 4993
	p = xdr_inline_decode(xdr, 8);
	if (unlikely(!p))
		goto out_overflow;
B
Benny Halevy 已提交
4994
	res->rflags = be32_to_cpup(p++);
4995
	bmlen = be32_to_cpup(p);
A
Andy Adamson 已提交
4996 4997
	if (bmlen > 10)
		goto xdr_error;
L
Linus Torvalds 已提交
4998

B
Benny Halevy 已提交
4999 5000 5001
	p = xdr_inline_decode(xdr, bmlen << 2);
	if (unlikely(!p))
		goto out_overflow;
5002 5003
	savewords = min_t(uint32_t, bmlen, NFS4_BITMAP_SIZE);
	for (i = 0; i < savewords; ++i)
B
Benny Halevy 已提交
5004
		res->attrset[i] = be32_to_cpup(p++);
5005 5006 5007
	for (; i < NFS4_BITMAP_SIZE; i++)
		res->attrset[i] = 0;

L
Linus Torvalds 已提交
5008 5009
	return decode_delegation(xdr, res);
xdr_error:
5010
	dprintk("%s: Bitmap too large! Length = %u\n", __func__, bmlen);
L
Linus Torvalds 已提交
5011
	return -EIO;
B
Benny Halevy 已提交
5012 5013 5014
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
L
Linus Torvalds 已提交
5015 5016 5017 5018 5019 5020
}

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

A
Andy Adamson 已提交
5021
	status = decode_op_hdr(xdr, OP_OPEN_CONFIRM);
5022 5023
	if (status != -EIO)
		nfs_increment_open_seqid(status, res->seqid);
5024 5025 5026
	if (!status)
		status = decode_stateid(xdr, &res->stateid);
	return status;
L
Linus Torvalds 已提交
5027 5028 5029 5030 5031 5032 5033
}

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

	status = decode_op_hdr(xdr, OP_OPEN_DOWNGRADE);
5034 5035
	if (status != -EIO)
		nfs_increment_open_seqid(status, res->seqid);
5036 5037 5038
	if (!status)
		status = decode_stateid(xdr, &res->stateid);
	return status;
L
Linus Torvalds 已提交
5039 5040 5041 5042 5043 5044 5045 5046 5047 5048 5049 5050
}

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);
}

5051 5052
static int decode_read(struct xdr_stream *xdr, struct rpc_rqst *req,
		       struct nfs_pgio_res *res)
L
Linus Torvalds 已提交
5053
{
A
Al Viro 已提交
5054
	__be32 *p;
5055
	uint32_t count, eof, recvd;
L
Linus Torvalds 已提交
5056 5057 5058 5059 5060
	int status;

	status = decode_op_hdr(xdr, OP_READ);
	if (status)
		return status;
B
Benny Halevy 已提交
5061 5062 5063
	p = xdr_inline_decode(xdr, 8);
	if (unlikely(!p))
		goto out_overflow;
B
Benny Halevy 已提交
5064
	eof = be32_to_cpup(p++);
5065
	count = be32_to_cpup(p);
5066
	recvd = xdr_read_pages(xdr, count);
L
Linus Torvalds 已提交
5067
	if (count > recvd) {
5068
		dprintk("NFS: server cheating in read reply: "
L
Linus Torvalds 已提交
5069 5070 5071 5072 5073 5074 5075
				"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
5076 5077 5078
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
L
Linus Torvalds 已提交
5079 5080 5081 5082
}

static int decode_readdir(struct xdr_stream *xdr, struct rpc_rqst *req, struct nfs4_readdir_res *readdir)
{
5083
	int		status;
5084
	__be32		verf[2];
L
Linus Torvalds 已提交
5085 5086

	status = decode_op_hdr(xdr, OP_READDIR);
5087 5088 5089
	if (!status)
		status = decode_verifier(xdr, readdir->verifier.data);
	if (unlikely(status))
L
Linus Torvalds 已提交
5090
		return status;
5091
	memcpy(verf, readdir->verifier.data, sizeof(verf));
5092
	dprintk("%s: verifier = %08x:%08x\n",
5093
			__func__, verf[0], verf[1]);
5094
	return xdr_read_pages(xdr, xdr->buf->page_len);
L
Linus Torvalds 已提交
5095 5096 5097 5098 5099
}

static int decode_readlink(struct xdr_stream *xdr, struct rpc_rqst *req)
{
	struct xdr_buf *rcvbuf = &req->rq_rcv_buf;
5100
	u32 len, recvd;
A
Al Viro 已提交
5101
	__be32 *p;
L
Linus Torvalds 已提交
5102 5103 5104 5105 5106 5107 5108
	int status;

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

	/* Convert length of symlink */
B
Benny Halevy 已提交
5109 5110 5111
	p = xdr_inline_decode(xdr, 4);
	if (unlikely(!p))
		goto out_overflow;
5112
	len = be32_to_cpup(p);
L
Linus Torvalds 已提交
5113
	if (len >= rcvbuf->page_len || len <= 0) {
5114
		dprintk("nfs: server returned giant symlink!\n");
L
Linus Torvalds 已提交
5115 5116
		return -ENAMETOOLONG;
	}
5117
	recvd = xdr_read_pages(xdr, len);
L
Linus Torvalds 已提交
5118
	if (recvd < len) {
5119
		dprintk("NFS: server cheating in readlink reply: "
L
Linus Torvalds 已提交
5120 5121 5122 5123 5124 5125 5126 5127 5128 5129
				"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).
	 */
5130
	xdr_terminate_string(rcvbuf, len);
L
Linus Torvalds 已提交
5131
	return 0;
B
Benny Halevy 已提交
5132 5133 5134
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
L
Linus Torvalds 已提交
5135 5136 5137 5138 5139 5140 5141 5142 5143 5144 5145 5146 5147 5148 5149 5150 5151 5152 5153 5154 5155 5156 5157 5158 5159 5160 5161 5162 5163 5164 5165 5166 5167 5168
}

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);
}

5169 5170 5171 5172 5173 5174
static int
decode_restorefh(struct xdr_stream *xdr)
{
	return decode_op_hdr(xdr, OP_RESTOREFH);
}

5175
static int decode_getacl(struct xdr_stream *xdr, struct rpc_rqst *req,
5176
			 struct nfs_getaclres *res)
5177
{
5178
	unsigned int savep;
5179
	uint32_t attrlen,
5180
		 bitmap[3] = {0};
5181
	int status;
5182
	unsigned int pg_offset;
5183

5184
	res->acl_len = 0;
5185 5186
	if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
		goto out;
5187

5188 5189
	xdr_enter_page(xdr, xdr->buf->page_len);

5190 5191
	/* Calculate the offset of the page data */
	pg_offset = xdr->buf->head[0].iov_len;
5192

5193 5194 5195 5196 5197 5198 5199 5200 5201
	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)) {

5202 5203 5204
		/* 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.*/
5205
		res->acl_data_offset = xdr_stream_pos(xdr) - pg_offset;
5206
		res->acl_len = attrlen;
5207 5208 5209 5210 5211

		/* 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;
5212
			dprintk("NFS: acl reply: attrlen %u > page_len %u\n",
5213
					attrlen, xdr->nwords << 2);
5214
		}
J
J. Bruce Fields 已提交
5215 5216
	} else
		status = -EOPNOTSUPP;
5217 5218 5219 5220 5221

out:
	return status;
}

L
Linus Torvalds 已提交
5222 5223 5224 5225 5226 5227
static int
decode_savefh(struct xdr_stream *xdr)
{
	return decode_op_hdr(xdr, OP_SAVEFH);
}

5228
static int decode_setattr(struct xdr_stream *xdr)
L
Linus Torvalds 已提交
5229
{
A
Al Viro 已提交
5230
	__be32 *p;
L
Linus Torvalds 已提交
5231 5232 5233 5234 5235 5236
	uint32_t bmlen;
	int status;

	status = decode_op_hdr(xdr, OP_SETATTR);
	if (status)
		return status;
B
Benny Halevy 已提交
5237 5238 5239
	p = xdr_inline_decode(xdr, 4);
	if (unlikely(!p))
		goto out_overflow;
5240
	bmlen = be32_to_cpup(p);
B
Benny Halevy 已提交
5241 5242 5243 5244 5245 5246
	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
5247 5248
}

5249
static int decode_setclientid(struct xdr_stream *xdr, struct nfs4_setclientid_res *res)
L
Linus Torvalds 已提交
5250
{
A
Al Viro 已提交
5251
	__be32 *p;
L
Linus Torvalds 已提交
5252 5253 5254
	uint32_t opnum;
	int32_t nfserr;

B
Benny Halevy 已提交
5255 5256 5257
	p = xdr_inline_decode(xdr, 8);
	if (unlikely(!p))
		goto out_overflow;
B
Benny Halevy 已提交
5258
	opnum = be32_to_cpup(p++);
L
Linus Torvalds 已提交
5259
	if (opnum != OP_SETCLIENTID) {
5260
		dprintk("nfs: decode_setclientid: Server returned operation"
5261
			" %d\n", opnum);
L
Linus Torvalds 已提交
5262 5263
		return -EIO;
	}
5264
	nfserr = be32_to_cpup(p);
L
Linus Torvalds 已提交
5265
	if (nfserr == NFS_OK) {
B
Benny Halevy 已提交
5266 5267 5268
		p = xdr_inline_decode(xdr, 8 + NFS4_VERIFIER_SIZE);
		if (unlikely(!p))
			goto out_overflow;
5269 5270
		p = xdr_decode_hyper(p, &res->clientid);
		memcpy(res->confirm.data, p, NFS4_VERIFIER_SIZE);
L
Linus Torvalds 已提交
5271 5272 5273 5274
	} else if (nfserr == NFSERR_CLID_INUSE) {
		uint32_t len;

		/* skip netid string */
B
Benny Halevy 已提交
5275 5276 5277
		p = xdr_inline_decode(xdr, 4);
		if (unlikely(!p))
			goto out_overflow;
5278
		len = be32_to_cpup(p);
B
Benny Halevy 已提交
5279 5280 5281
		p = xdr_inline_decode(xdr, len);
		if (unlikely(!p))
			goto out_overflow;
L
Linus Torvalds 已提交
5282 5283

		/* skip uaddr string */
B
Benny Halevy 已提交
5284 5285 5286
		p = xdr_inline_decode(xdr, 4);
		if (unlikely(!p))
			goto out_overflow;
5287
		len = be32_to_cpup(p);
B
Benny Halevy 已提交
5288 5289 5290
		p = xdr_inline_decode(xdr, len);
		if (unlikely(!p))
			goto out_overflow;
L
Linus Torvalds 已提交
5291 5292
		return -NFSERR_CLID_INUSE;
	} else
5293
		return nfs4_stat_to_errno(nfserr);
L
Linus Torvalds 已提交
5294 5295

	return 0;
B
Benny Halevy 已提交
5296 5297 5298
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
L
Linus Torvalds 已提交
5299 5300 5301 5302 5303 5304 5305
}

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

5306
static int decode_write(struct xdr_stream *xdr, struct nfs_pgio_res *res)
L
Linus Torvalds 已提交
5307
{
A
Al Viro 已提交
5308
	__be32 *p;
L
Linus Torvalds 已提交
5309 5310 5311 5312 5313 5314
	int status;

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

5315
	p = xdr_inline_decode(xdr, 8);
B
Benny Halevy 已提交
5316 5317
	if (unlikely(!p))
		goto out_overflow;
B
Benny Halevy 已提交
5318 5319
	res->count = be32_to_cpup(p++);
	res->verf->committed = be32_to_cpup(p++);
5320
	return decode_write_verifier(xdr, &res->verf->verifier);
B
Benny Halevy 已提交
5321 5322 5323
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
L
Linus Torvalds 已提交
5324 5325 5326 5327 5328 5329 5330
}

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

5331 5332
static int decode_secinfo_gss(struct xdr_stream *xdr,
			      struct nfs4_secinfo4 *flavor)
B
Bryan Schumaker 已提交
5333
{
5334
	u32 oid_len;
B
Bryan Schumaker 已提交
5335 5336 5337 5338 5339
	__be32 *p;

	p = xdr_inline_decode(xdr, 4);
	if (unlikely(!p))
		goto out_overflow;
5340 5341
	oid_len = be32_to_cpup(p);
	if (oid_len > GSS_OID_MAX_LEN)
B
Bryan Schumaker 已提交
5342 5343
		goto out_err;

5344
	p = xdr_inline_decode(xdr, oid_len);
B
Bryan Schumaker 已提交
5345 5346
	if (unlikely(!p))
		goto out_overflow;
5347 5348
	memcpy(flavor->flavor_info.oid.data, p, oid_len);
	flavor->flavor_info.oid.len = oid_len;
B
Bryan Schumaker 已提交
5349 5350 5351 5352

	p = xdr_inline_decode(xdr, 8);
	if (unlikely(!p))
		goto out_overflow;
5353 5354
	flavor->flavor_info.qop = be32_to_cpup(p++);
	flavor->flavor_info.service = be32_to_cpup(p);
B
Bryan Schumaker 已提交
5355 5356 5357 5358 5359 5360 5361 5362 5363 5364

	return 0;

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

B
Bryan Schumaker 已提交
5365
static int decode_secinfo_common(struct xdr_stream *xdr, struct nfs4_secinfo_res *res)
B
Bryan Schumaker 已提交
5366
{
5367 5368
	struct nfs4_secinfo4 *sec_flavor;
	unsigned int i, num_flavors;
B
Bryan Schumaker 已提交
5369 5370 5371 5372 5373 5374 5375
	int status;
	__be32 *p;

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

5376 5377 5378 5379
	res->flavors->num_flavors = 0;
	num_flavors = be32_to_cpup(p);

	for (i = 0; i < num_flavors; i++) {
B
Bryan Schumaker 已提交
5380
		sec_flavor = &res->flavors->flavors[i];
5381
		if ((char *)&sec_flavor[1] - (char *)res->flavors > PAGE_SIZE)
B
Bryan Schumaker 已提交
5382 5383 5384 5385 5386 5387 5388 5389
			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) {
5390 5391 5392
			status = decode_secinfo_gss(xdr, sec_flavor);
			if (status)
				goto out;
B
Bryan Schumaker 已提交
5393
		}
5394
		res->flavors->num_flavors++;
B
Bryan Schumaker 已提交
5395 5396
	}

B
Bryan Schumaker 已提交
5397
	status = 0;
5398 5399
out:
	return status;
B
Bryan Schumaker 已提交
5400 5401 5402 5403 5404
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
}

B
Bryan Schumaker 已提交
5405 5406 5407 5408 5409 5410 5411 5412
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
5413
#if defined(CONFIG_NFS_V4_1)
B
Bryan Schumaker 已提交
5414 5415 5416 5417 5418 5419 5420 5421
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);
}

5422 5423 5424 5425 5426 5427 5428 5429 5430 5431 5432 5433 5434 5435 5436 5437 5438
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
5439 5440 5441 5442 5443
static int decode_exchange_id(struct xdr_stream *xdr,
			      struct nfs41_exchange_id_res *res)
{
	__be32 *p;
	uint32_t dummy;
5444
	char *dummy_str;
B
Benny Halevy 已提交
5445
	int status;
5446
	uint32_t impl_id_count;
B
Benny Halevy 已提交
5447 5448 5449 5450 5451

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

B
Benny Halevy 已提交
5452 5453 5454
	p = xdr_inline_decode(xdr, 8);
	if (unlikely(!p))
		goto out_overflow;
5455
	xdr_decode_hyper(p, &res->clientid);
B
Benny Halevy 已提交
5456 5457 5458
	p = xdr_inline_decode(xdr, 12);
	if (unlikely(!p))
		goto out_overflow;
5459 5460
	res->seqid = be32_to_cpup(p++);
	res->flags = be32_to_cpup(p++);
B
Benny Halevy 已提交
5461

5462 5463 5464 5465 5466 5467 5468 5469 5470 5471 5472 5473 5474 5475
	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
5476
		return -EIO;
5477
	}
B
Benny Halevy 已提交
5478

5479
	/* server_owner4.so_minor_id */
B
Benny Halevy 已提交
5480 5481 5482
	p = xdr_inline_decode(xdr, 8);
	if (unlikely(!p))
		goto out_overflow;
5483
	p = xdr_decode_hyper(p, &res->server_owner->minor_id);
B
Benny Halevy 已提交
5484

5485
	/* server_owner4.so_major_id */
5486 5487 5488
	status = decode_opaque_inline(xdr, &dummy, &dummy_str);
	if (unlikely(status))
		return status;
5489 5490 5491 5492
	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
5493

5494
	/* server_scope4 */
5495 5496 5497
	status = decode_opaque_inline(xdr, &dummy, &dummy_str);
	if (unlikely(status))
		return status;
5498 5499 5500 5501 5502
	if (unlikely(dummy > NFS4_OPAQUE_LIMIT))
		return -EIO;
	memcpy(res->server_scope->server_scope, dummy_str, dummy);
	res->server_scope->server_scope_sz = dummy;

5503 5504 5505 5506 5507
	/* 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
5508

5509 5510 5511 5512 5513 5514 5515 5516 5517 5518 5519 5520 5521 5522 5523 5524 5525 5526 5527 5528 5529 5530 5531 5532 5533 5534
	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
5535
	return 0;
B
Benny Halevy 已提交
5536 5537 5538
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
B
Benny Halevy 已提交
5539
}
A
Andy Adamson 已提交
5540 5541 5542 5543 5544

static int decode_chan_attrs(struct xdr_stream *xdr,
			     struct nfs4_channel_attrs *attrs)
{
	__be32 *p;
5545
	u32 nr_attrs, val;
A
Andy Adamson 已提交
5546

B
Benny Halevy 已提交
5547 5548 5549
	p = xdr_inline_decode(xdr, 28);
	if (unlikely(!p))
		goto out_overflow;
5550 5551 5552
	val = be32_to_cpup(p++);	/* headerpadsz */
	if (val)
		return -EINVAL;		/* no support for header padding yet */
B
Benny Halevy 已提交
5553 5554 5555 5556 5557
	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++);
5558
	nr_attrs = be32_to_cpup(p);
A
Andy Adamson 已提交
5559
	if (unlikely(nr_attrs > 1)) {
5560 5561
		printk(KERN_WARNING "NFS: %s: Invalid rdma channel attrs "
			"count %u\n", __func__, nr_attrs);
A
Andy Adamson 已提交
5562 5563
		return -EINVAL;
	}
B
Benny Halevy 已提交
5564 5565 5566 5567 5568
	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
5569
	return 0;
B
Benny Halevy 已提交
5570 5571 5572
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
A
Andy Adamson 已提交
5573 5574
}

5575 5576 5577
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
5578 5579
}

5580 5581 5582 5583 5584 5585 5586 5587 5588 5589 5590 5591 5592 5593 5594 5595 5596 5597 5598 5599 5600 5601 5602 5603 5604 5605 5606 5607 5608 5609 5610
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
5611 5612 5613 5614 5615 5616 5617 5618 5619
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);
5620 5621 5622
	if (!status)
		status = decode_sessionid(xdr, &session->sess_id);
	if (unlikely(status))
A
Andy Adamson 已提交
5623 5624 5625
		return status;

	/* seqid, flags */
B
Benny Halevy 已提交
5626 5627 5628
	p = xdr_inline_decode(xdr, 8);
	if (unlikely(!p))
		goto out_overflow;
B
Benny Halevy 已提交
5629
	clp->cl_seqid = be32_to_cpup(p++);
5630
	session->flags = be32_to_cpup(p);
A
Andy Adamson 已提交
5631 5632 5633 5634 5635 5636

	/* 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
5637 5638 5639
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
A
Andy Adamson 已提交
5640
}
A
Andy Adamson 已提交
5641 5642 5643 5644 5645

static int decode_destroy_session(struct xdr_stream *xdr, void *dummy)
{
	return decode_op_hdr(xdr, OP_DESTROY_SESSION);
}
5646

T
Trond Myklebust 已提交
5647 5648 5649 5650 5651
static int decode_destroy_clientid(struct xdr_stream *xdr, void *dummy)
{
	return decode_op_hdr(xdr, OP_DESTROY_CLIENTID);
}

5652 5653 5654 5655
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
5656 5657
#endif /* CONFIG_NFS_V4_1 */

5658 5659 5660 5661 5662
static int decode_sequence(struct xdr_stream *xdr,
			   struct nfs4_sequence_res *res,
			   struct rpc_rqst *rqstp)
{
#if defined(CONFIG_NFS_V4_1)
5663
	struct nfs4_session *session;
A
Andy Adamson 已提交
5664 5665 5666 5667 5668
	struct nfs4_sessionid id;
	u32 dummy;
	int status;
	__be32 *p;

5669
	if (res->sr_slot == NULL)
5670
		return 0;
C
Chuck Lever 已提交
5671 5672
	if (!res->sr_slot->table->session)
		return 0;
5673

A
Andy Adamson 已提交
5674
	status = decode_op_hdr(xdr, OP_SEQUENCE);
5675 5676 5677
	if (!status)
		status = decode_sessionid(xdr, &id);
	if (unlikely(status))
A
Andy Adamson 已提交
5678
		goto out_err;
5679

A
Andy Adamson 已提交
5680 5681 5682 5683
	/*
	 * If the server returns different values for sessionID, slotID or
	 * sequence number, the server is looney tunes.
	 */
5684
	status = -EREMOTEIO;
5685
	session = res->sr_slot->table->session;
A
Andy Adamson 已提交
5686

5687
	if (memcmp(id.data, session->sess_id.data,
A
Andy Adamson 已提交
5688 5689 5690 5691
		   NFS4_MAX_SESSIONID_LEN)) {
		dprintk("%s Invalid session id\n", __func__);
		goto out_err;
	}
5692

B
Benny Halevy 已提交
5693 5694 5695
	p = xdr_inline_decode(xdr, 20);
	if (unlikely(!p))
		goto out_overflow;
5696

A
Andy Adamson 已提交
5697
	/* seqid */
B
Benny Halevy 已提交
5698
	dummy = be32_to_cpup(p++);
5699
	if (dummy != res->sr_slot->seq_nr) {
A
Andy Adamson 已提交
5700 5701 5702 5703
		dprintk("%s Invalid sequence number\n", __func__);
		goto out_err;
	}
	/* slot id */
B
Benny Halevy 已提交
5704
	dummy = be32_to_cpup(p++);
5705
	if (dummy != res->sr_slot->slot_nr) {
A
Andy Adamson 已提交
5706 5707 5708
		dprintk("%s Invalid slot id\n", __func__);
		goto out_err;
	}
5709 5710
	/* highest slot id */
	res->sr_highest_slotid = be32_to_cpup(p++);
5711 5712
	/* target highest slot id */
	res->sr_target_highest_slotid = be32_to_cpup(p++);
5713 5714
	/* result flags */
	res->sr_status_flags = be32_to_cpup(p);
A
Andy Adamson 已提交
5715 5716 5717 5718
	status = 0;
out_err:
	res->sr_status = status;
	return status;
B
Benny Halevy 已提交
5719 5720 5721 5722
out_overflow:
	print_overflow_msg(__func__, xdr);
	status = -EIO;
	goto out_err;
A
Andy Adamson 已提交
5723
#else  /* CONFIG_NFS_V4_1 */
5724
	return 0;
A
Andy Adamson 已提交
5725
#endif /* CONFIG_NFS_V4_1 */
5726 5727
}

5728 5729 5730 5731 5732 5733 5734 5735 5736 5737 5738 5739 5740 5741 5742 5743 5744 5745 5746 5747 5748 5749 5750 5751 5752 5753 5754 5755 5756 5757 5758 5759 5760 5761 5762 5763
#if defined(CONFIG_NFS_V4_1)
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);
5764 5765
	if (xdr_read_pages(xdr, pdev->mincount) != pdev->mincount)
		goto out_overflow;
5766 5767 5768 5769 5770 5771 5772

	/* 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) {
5773
		uint32_t i;
5774 5775 5776 5777

		p = xdr_inline_decode(xdr, 4 * len);
		if (unlikely(!p))
			goto out_overflow;
5778 5779 5780 5781 5782 5783 5784 5785 5786 5787

		if (be32_to_cpup(p++) &
		    ~(NOTIFY_DEVICEID4_CHANGE | NOTIFY_DEVICEID4_DELETE)) {
			dprintk("%s: unsupported notification\n",
				__func__);
		}

		for (i = 1; i < len; i++) {
			if (be32_to_cpup(p++)) {
				dprintk("%s: unsupported notification\n",
5788 5789 5790 5791 5792 5793 5794 5795 5796 5797 5798 5799 5800 5801 5802 5803 5804
					__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;
5805
	u32 recvd;
5806 5807 5808 5809

	status = decode_op_hdr(xdr, OP_LAYOUTGET);
	if (status)
		return status;
5810 5811 5812 5813 5814 5815
	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);
5816 5817 5818 5819 5820 5821 5822 5823 5824
	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;
	}

5825
	p = xdr_inline_decode(xdr, 28);
5826 5827 5828 5829 5830 5831
	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++);
5832
	res->layoutp->len = be32_to_cpup(p);
5833 5834 5835 5836 5837 5838 5839

	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,
5840 5841
		res->layoutp->len);

5842
	recvd = xdr_read_pages(xdr, res->layoutp->len);
5843 5844 5845 5846 5847 5848
	if (res->layoutp->len > recvd) {
		dprintk("NFS: server cheating in layoutget reply: "
				"layout len %u > recvd %u\n",
				res->layoutp->len, recvd);
		return -EINVAL;
	}
5849 5850 5851 5852 5853 5854 5855 5856 5857 5858 5859 5860 5861 5862 5863 5864

	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
5865

B
Benny Halevy 已提交
5866 5867 5868 5869 5870 5871 5872 5873 5874 5875 5876 5877 5878 5879 5880 5881 5882 5883 5884 5885 5886
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
5887 5888 5889 5890 5891 5892 5893 5894 5895
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
5896
	res->status = status;
A
Andy Adamson 已提交
5897 5898 5899 5900 5901 5902 5903 5904 5905 5906 5907 5908 5909 5910 5911 5912 5913 5914 5915
	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
5916 5917 5918 5919 5920 5921 5922 5923 5924 5925 5926 5927 5928 5929 5930 5931 5932 5933 5934 5935 5936 5937 5938

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++);
5939 5940

	return status;
B
Bryan Schumaker 已提交
5941 5942 5943 5944 5945
out_overflow:
	print_overflow_msg(__func__, xdr);
out:
	return -EIO;
}
B
Bryan Schumaker 已提交
5946 5947 5948 5949

static int decode_free_stateid(struct xdr_stream *xdr,
			       struct nfs41_free_stateid_res *res)
{
A
Andy Adamson 已提交
5950
	res->status = decode_op_hdr(xdr, OP_FREE_STATEID);
B
Bryan Schumaker 已提交
5951 5952
	return res->status;
}
5953 5954
#endif /* CONFIG_NFS_V4_1 */

5955 5956 5957 5958
/*
 * END OF "GENERIC" DECODE ROUTINES.
 */

L
Linus Torvalds 已提交
5959 5960 5961
/*
 * Decode OPEN_DOWNGRADE response
 */
5962 5963 5964
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
5965
{
A
Andy Adamson 已提交
5966 5967 5968
	struct compound_hdr hdr;
	int status;

5969
	status = decode_compound_hdr(xdr, &hdr);
5970 5971
	if (status)
		goto out;
5972
	status = decode_sequence(xdr, &res->seq_res, rqstp);
A
Andy Adamson 已提交
5973 5974
	if (status)
		goto out;
5975
	status = decode_putfh(xdr);
A
Andy Adamson 已提交
5976 5977
	if (status)
		goto out;
5978
	status = decode_open_downgrade(xdr, res);
5979 5980
	if (status != 0)
		goto out;
5981
	decode_getfattr(xdr, res->fattr, res->server);
L
Linus Torvalds 已提交
5982
out:
A
Andy Adamson 已提交
5983
	return status;
L
Linus Torvalds 已提交
5984 5985 5986 5987 5988
}

/*
 * Decode ACCESS response
 */
5989 5990
static int nfs4_xdr_dec_access(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
			       struct nfs4_accessres *res)
L
Linus Torvalds 已提交
5991 5992 5993
{
	struct compound_hdr hdr;
	int status;
5994

5995
	status = decode_compound_hdr(xdr, &hdr);
5996 5997
	if (status)
		goto out;
5998
	status = decode_sequence(xdr, &res->seq_res, rqstp);
5999
	if (status)
L
Linus Torvalds 已提交
6000
		goto out;
6001
	status = decode_putfh(xdr);
6002 6003
	if (status != 0)
		goto out;
6004
	status = decode_access(xdr, &res->supported, &res->access);
6005 6006
	if (status != 0)
		goto out;
6007
	decode_getfattr(xdr, res->fattr, res->server);
L
Linus Torvalds 已提交
6008 6009 6010 6011 6012 6013 6014
out:
	return status;
}

/*
 * Decode LOOKUP response
 */
6015 6016
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
6017 6018 6019
{
	struct compound_hdr hdr;
	int status;
6020

6021
	status = decode_compound_hdr(xdr, &hdr);
6022 6023
	if (status)
		goto out;
6024
	status = decode_sequence(xdr, &res->seq_res, rqstp);
6025
	if (status)
L
Linus Torvalds 已提交
6026
		goto out;
6027 6028
	status = decode_putfh(xdr);
	if (status)
L
Linus Torvalds 已提交
6029
		goto out;
6030 6031
	status = decode_lookup(xdr);
	if (status)
L
Linus Torvalds 已提交
6032
		goto out;
6033 6034
	status = decode_getfh(xdr, res->fh);
	if (status)
L
Linus Torvalds 已提交
6035
		goto out;
6036
	status = decode_getfattr_label(xdr, res->fattr, res->label, res->server);
L
Linus Torvalds 已提交
6037 6038 6039 6040 6041 6042 6043
out:
	return status;
}

/*
 * Decode LOOKUP_ROOT response
 */
6044 6045 6046
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
6047 6048 6049
{
	struct compound_hdr hdr;
	int status;
6050

6051
	status = decode_compound_hdr(xdr, &hdr);
6052 6053
	if (status)
		goto out;
6054
	status = decode_sequence(xdr, &res->seq_res, rqstp);
6055
	if (status)
L
Linus Torvalds 已提交
6056
		goto out;
6057 6058
	status = decode_putrootfh(xdr);
	if (status)
L
Linus Torvalds 已提交
6059
		goto out;
6060 6061
	status = decode_getfh(xdr, res->fh);
	if (status == 0)
6062 6063
		status = decode_getfattr_label(xdr, res->fattr,
						res->label, res->server);
L
Linus Torvalds 已提交
6064 6065 6066 6067 6068 6069 6070
out:
	return status;
}

/*
 * Decode REMOVE response
 */
6071 6072
static int nfs4_xdr_dec_remove(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
			       struct nfs_removeres *res)
L
Linus Torvalds 已提交
6073 6074 6075
{
	struct compound_hdr hdr;
	int status;
6076

6077
	status = decode_compound_hdr(xdr, &hdr);
6078 6079
	if (status)
		goto out;
6080
	status = decode_sequence(xdr, &res->seq_res, rqstp);
6081
	if (status)
L
Linus Torvalds 已提交
6082
		goto out;
6083 6084
	status = decode_putfh(xdr);
	if (status)
6085
		goto out;
6086
	status = decode_remove(xdr, &res->cinfo);
L
Linus Torvalds 已提交
6087 6088 6089 6090 6091 6092 6093
out:
	return status;
}

/*
 * Decode RENAME response
 */
6094 6095
static int nfs4_xdr_dec_rename(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
			       struct nfs_renameres *res)
L
Linus Torvalds 已提交
6096 6097 6098
{
	struct compound_hdr hdr;
	int status;
6099

6100
	status = decode_compound_hdr(xdr, &hdr);
6101 6102
	if (status)
		goto out;
6103
	status = decode_sequence(xdr, &res->seq_res, rqstp);
6104
	if (status)
L
Linus Torvalds 已提交
6105
		goto out;
6106 6107
	status = decode_putfh(xdr);
	if (status)
L
Linus Torvalds 已提交
6108
		goto out;
6109 6110
	status = decode_savefh(xdr);
	if (status)
L
Linus Torvalds 已提交
6111
		goto out;
6112 6113
	status = decode_putfh(xdr);
	if (status)
L
Linus Torvalds 已提交
6114
		goto out;
6115
	status = decode_rename(xdr, &res->old_cinfo, &res->new_cinfo);
L
Linus Torvalds 已提交
6116 6117 6118 6119 6120 6121 6122
out:
	return status;
}

/*
 * Decode LINK response
 */
6123 6124
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
6125 6126 6127
{
	struct compound_hdr hdr;
	int status;
6128

6129
	status = decode_compound_hdr(xdr, &hdr);
6130 6131
	if (status)
		goto out;
6132
	status = decode_sequence(xdr, &res->seq_res, rqstp);
6133
	if (status)
L
Linus Torvalds 已提交
6134
		goto out;
6135 6136
	status = decode_putfh(xdr);
	if (status)
L
Linus Torvalds 已提交
6137
		goto out;
6138 6139
	status = decode_savefh(xdr);
	if (status)
L
Linus Torvalds 已提交
6140
		goto out;
6141 6142
	status = decode_putfh(xdr);
	if (status)
L
Linus Torvalds 已提交
6143
		goto out;
6144 6145
	status = decode_link(xdr, &res->cinfo);
	if (status)
6146 6147 6148 6149 6150
		goto out;
	/*
	 * Note order: OP_LINK leaves the directory as the current
	 *             filehandle.
	 */
6151 6152
	status = decode_restorefh(xdr);
	if (status)
6153
		goto out;
6154
	decode_getfattr_label(xdr, res->fattr, res->label, res->server);
L
Linus Torvalds 已提交
6155 6156 6157 6158 6159 6160 6161
out:
	return status;
}

/*
 * Decode CREATE response
 */
6162 6163
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
6164 6165 6166
{
	struct compound_hdr hdr;
	int status;
6167

6168
	status = decode_compound_hdr(xdr, &hdr);
6169 6170
	if (status)
		goto out;
6171
	status = decode_sequence(xdr, &res->seq_res, rqstp);
6172
	if (status)
L
Linus Torvalds 已提交
6173
		goto out;
6174 6175
	status = decode_putfh(xdr);
	if (status)
6176
		goto out;
6177 6178
	status = decode_create(xdr, &res->dir_cinfo);
	if (status)
L
Linus Torvalds 已提交
6179
		goto out;
6180 6181
	status = decode_getfh(xdr, res->fh);
	if (status)
L
Linus Torvalds 已提交
6182
		goto out;
6183
	decode_getfattr_label(xdr, res->fattr, res->label, res->server);
L
Linus Torvalds 已提交
6184 6185 6186 6187 6188 6189 6190
out:
	return status;
}

/*
 * Decode SYMLINK response
 */
6191 6192
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
6193
{
6194
	return nfs4_xdr_dec_create(rqstp, xdr, res);
L
Linus Torvalds 已提交
6195 6196 6197 6198 6199
}

/*
 * Decode GETATTR response
 */
6200 6201
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
6202 6203 6204
{
	struct compound_hdr hdr;
	int status;
6205

6206
	status = decode_compound_hdr(xdr, &hdr);
6207 6208
	if (status)
		goto out;
6209
	status = decode_sequence(xdr, &res->seq_res, rqstp);
L
Linus Torvalds 已提交
6210 6211
	if (status)
		goto out;
6212
	status = decode_putfh(xdr);
L
Linus Torvalds 已提交
6213 6214
	if (status)
		goto out;
6215
	status = decode_getfattr_label(xdr, res->fattr, res->label, res->server);
L
Linus Torvalds 已提交
6216 6217 6218 6219
out:
	return status;
}

6220 6221 6222
/*
 * Encode an SETACL request
 */
6223 6224
static void nfs4_xdr_enc_setacl(struct rpc_rqst *req, struct xdr_stream *xdr,
				struct nfs_setaclargs *args)
6225
{
A
Andy Adamson 已提交
6226
	struct compound_hdr hdr = {
6227
		.minorversion = nfs4_xdr_minorversion(&args->seq_args),
A
Andy Adamson 已提交
6228 6229
	};

6230 6231 6232 6233
	encode_compound_hdr(xdr, req, &hdr);
	encode_sequence(xdr, &args->seq_args, &hdr);
	encode_putfh(xdr, args->fh, &hdr);
	encode_setacl(xdr, args, &hdr);
6234
	encode_nops(&hdr);
6235
}
A
Andy Adamson 已提交
6236

6237 6238 6239 6240
/*
 * Decode SETACL response
 */
static int
6241
nfs4_xdr_dec_setacl(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
B
Benny Halevy 已提交
6242
		    struct nfs_setaclres *res)
6243 6244 6245 6246
{
	struct compound_hdr hdr;
	int status;

6247
	status = decode_compound_hdr(xdr, &hdr);
6248 6249
	if (status)
		goto out;
6250
	status = decode_sequence(xdr, &res->seq_res, rqstp);
6251 6252
	if (status)
		goto out;
6253
	status = decode_putfh(xdr);
6254 6255
	if (status)
		goto out;
6256
	status = decode_setattr(xdr);
6257 6258 6259
out:
	return status;
}
L
Linus Torvalds 已提交
6260

6261 6262 6263 6264
/*
 * Decode GETACL response
 */
static int
6265
nfs4_xdr_dec_getacl(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
B
Benny Halevy 已提交
6266
		    struct nfs_getaclres *res)
6267 6268 6269 6270
{
	struct compound_hdr hdr;
	int status;

6271 6272 6273 6274
	if (res->acl_scratch != NULL) {
		void *p = page_address(res->acl_scratch);
		xdr_set_scratch_buffer(xdr, p, PAGE_SIZE);
	}
6275
	status = decode_compound_hdr(xdr, &hdr);
6276 6277
	if (status)
		goto out;
6278
	status = decode_sequence(xdr, &res->seq_res, rqstp);
6279 6280
	if (status)
		goto out;
6281
	status = decode_putfh(xdr);
6282 6283
	if (status)
		goto out;
6284
	status = decode_getacl(xdr, rqstp, res);
6285 6286 6287 6288 6289

out:
	return status;
}

L
Linus Torvalds 已提交
6290 6291 6292
/*
 * Decode CLOSE response
 */
6293 6294
static int nfs4_xdr_dec_close(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
			      struct nfs_closeres *res)
L
Linus Torvalds 已提交
6295
{
A
Andy Adamson 已提交
6296 6297 6298
	struct compound_hdr hdr;
	int status;

6299
	status = decode_compound_hdr(xdr, &hdr);
6300 6301
	if (status)
		goto out;
6302
	status = decode_sequence(xdr, &res->seq_res, rqstp);
A
Andy Adamson 已提交
6303 6304
	if (status)
		goto out;
6305
	status = decode_putfh(xdr);
A
Andy Adamson 已提交
6306 6307
	if (status)
		goto out;
6308
	status = decode_close(xdr, res);
6309 6310 6311 6312 6313 6314 6315 6316
	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.
	 */
6317
	decode_getfattr(xdr, res->fattr, res->server);
L
Linus Torvalds 已提交
6318
out:
A
Andy Adamson 已提交
6319
	return status;
L
Linus Torvalds 已提交
6320 6321 6322 6323 6324
}

/*
 * Decode OPEN response
 */
6325 6326
static int nfs4_xdr_dec_open(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
			     struct nfs_openres *res)
L
Linus Torvalds 已提交
6327
{
A
Andy Adamson 已提交
6328 6329 6330
	struct compound_hdr hdr;
	int status;

6331
	status = decode_compound_hdr(xdr, &hdr);
6332 6333
	if (status)
		goto out;
6334
	status = decode_sequence(xdr, &res->seq_res, rqstp);
A
Andy Adamson 已提交
6335 6336
	if (status)
		goto out;
6337
	status = decode_putfh(xdr);
A
Andy Adamson 已提交
6338 6339
	if (status)
		goto out;
6340
	status = decode_open(xdr, res);
6341 6342
	if (status)
		goto out;
6343 6344
	status = decode_getfh(xdr, &res->fh);
	if (status)
L
Linus Torvalds 已提交
6345
		goto out;
6346 6347
	if (res->access_request)
		decode_access(xdr, &res->access_supported, &res->access_result);
6348
	decode_getfattr_label(xdr, res->f_attr, res->f_label, res->server);
L
Linus Torvalds 已提交
6349
out:
A
Andy Adamson 已提交
6350
	return status;
L
Linus Torvalds 已提交
6351 6352 6353 6354 6355
}

/*
 * Decode OPEN_CONFIRM response
 */
6356 6357 6358
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
6359
{
A
Andy Adamson 已提交
6360 6361 6362
	struct compound_hdr hdr;
	int status;

6363
	status = decode_compound_hdr(xdr, &hdr);
A
Andy Adamson 已提交
6364 6365
	if (status)
		goto out;
6366
	status = decode_putfh(xdr);
A
Andy Adamson 已提交
6367 6368
	if (status)
		goto out;
6369
	status = decode_open_confirm(xdr, res);
L
Linus Torvalds 已提交
6370
out:
A
Andy Adamson 已提交
6371
	return status;
L
Linus Torvalds 已提交
6372 6373 6374 6375 6376
}

/*
 * Decode OPEN response
 */
6377 6378 6379
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
6380
{
A
Andy Adamson 已提交
6381 6382 6383
	struct compound_hdr hdr;
	int status;

6384
	status = decode_compound_hdr(xdr, &hdr);
6385 6386
	if (status)
		goto out;
6387
	status = decode_sequence(xdr, &res->seq_res, rqstp);
A
Andy Adamson 已提交
6388 6389
	if (status)
		goto out;
6390
	status = decode_putfh(xdr);
A
Andy Adamson 已提交
6391 6392
	if (status)
		goto out;
6393
	status = decode_open(xdr, res);
A
Andy Adamson 已提交
6394 6395
	if (status)
		goto out;
6396 6397
	if (res->access_request)
		decode_access(xdr, &res->access_supported, &res->access_result);
6398
	decode_getfattr(xdr, res->f_attr, res->server);
L
Linus Torvalds 已提交
6399
out:
A
Andy Adamson 已提交
6400
	return status;
L
Linus Torvalds 已提交
6401 6402 6403 6404 6405
}

/*
 * Decode SETATTR response
 */
6406 6407 6408
static int nfs4_xdr_dec_setattr(struct rpc_rqst *rqstp,
				struct xdr_stream *xdr,
				struct nfs_setattrres *res)
L
Linus Torvalds 已提交
6409
{
A
Andy Adamson 已提交
6410 6411 6412
	struct compound_hdr hdr;
	int status;

6413
	status = decode_compound_hdr(xdr, &hdr);
6414 6415
	if (status)
		goto out;
6416
	status = decode_sequence(xdr, &res->seq_res, rqstp);
A
Andy Adamson 已提交
6417 6418
	if (status)
		goto out;
6419
	status = decode_putfh(xdr);
A
Andy Adamson 已提交
6420 6421
	if (status)
		goto out;
6422
	status = decode_setattr(xdr);
A
Andy Adamson 已提交
6423 6424
	if (status)
		goto out;
6425
	decode_getfattr_label(xdr, res->fattr, res->label, res->server);
L
Linus Torvalds 已提交
6426
out:
A
Andy Adamson 已提交
6427
	return status;
L
Linus Torvalds 已提交
6428 6429 6430 6431 6432
}

/*
 * Decode LOCK response
 */
6433 6434
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
6435 6436 6437 6438
{
	struct compound_hdr hdr;
	int status;

6439
	status = decode_compound_hdr(xdr, &hdr);
6440 6441
	if (status)
		goto out;
6442
	status = decode_sequence(xdr, &res->seq_res, rqstp);
L
Linus Torvalds 已提交
6443 6444
	if (status)
		goto out;
6445
	status = decode_putfh(xdr);
L
Linus Torvalds 已提交
6446 6447
	if (status)
		goto out;
6448
	status = decode_lock(xdr, res);
L
Linus Torvalds 已提交
6449 6450 6451 6452 6453 6454 6455
out:
	return status;
}

/*
 * Decode LOCKT response
 */
6456 6457
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
6458 6459 6460 6461
{
	struct compound_hdr hdr;
	int status;

6462
	status = decode_compound_hdr(xdr, &hdr);
6463 6464
	if (status)
		goto out;
6465
	status = decode_sequence(xdr, &res->seq_res, rqstp);
L
Linus Torvalds 已提交
6466 6467
	if (status)
		goto out;
6468
	status = decode_putfh(xdr);
L
Linus Torvalds 已提交
6469 6470
	if (status)
		goto out;
6471
	status = decode_lockt(xdr, res);
L
Linus Torvalds 已提交
6472 6473 6474 6475 6476 6477 6478
out:
	return status;
}

/*
 * Decode LOCKU response
 */
6479 6480
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
6481 6482 6483 6484
{
	struct compound_hdr hdr;
	int status;

6485
	status = decode_compound_hdr(xdr, &hdr);
6486 6487
	if (status)
		goto out;
6488
	status = decode_sequence(xdr, &res->seq_res, rqstp);
L
Linus Torvalds 已提交
6489 6490
	if (status)
		goto out;
6491
	status = decode_putfh(xdr);
L
Linus Torvalds 已提交
6492 6493
	if (status)
		goto out;
6494
	status = decode_locku(xdr, res);
L
Linus Torvalds 已提交
6495 6496 6497 6498
out:
	return status;
}

6499 6500
static int nfs4_xdr_dec_release_lockowner(struct rpc_rqst *rqstp,
					  struct xdr_stream *xdr, void *dummy)
6501 6502 6503 6504
{
	struct compound_hdr hdr;
	int status;

6505
	status = decode_compound_hdr(xdr, &hdr);
6506
	if (!status)
6507
		status = decode_release_lockowner(xdr);
6508 6509 6510
	return status;
}

L
Linus Torvalds 已提交
6511 6512 6513
/*
 * Decode READLINK response
 */
6514 6515
static int nfs4_xdr_dec_readlink(struct rpc_rqst *rqstp,
				 struct xdr_stream *xdr,
B
Benny Halevy 已提交
6516
				 struct nfs4_readlink_res *res)
L
Linus Torvalds 已提交
6517 6518 6519 6520
{
	struct compound_hdr hdr;
	int status;

6521
	status = decode_compound_hdr(xdr, &hdr);
6522 6523
	if (status)
		goto out;
6524
	status = decode_sequence(xdr, &res->seq_res, rqstp);
L
Linus Torvalds 已提交
6525 6526
	if (status)
		goto out;
6527
	status = decode_putfh(xdr);
L
Linus Torvalds 已提交
6528 6529
	if (status)
		goto out;
6530
	status = decode_readlink(xdr, rqstp);
L
Linus Torvalds 已提交
6531 6532 6533 6534 6535 6536 6537
out:
	return status;
}

/*
 * Decode READDIR response
 */
6538 6539
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
6540 6541 6542 6543
{
	struct compound_hdr hdr;
	int status;

6544
	status = decode_compound_hdr(xdr, &hdr);
6545 6546
	if (status)
		goto out;
6547
	status = decode_sequence(xdr, &res->seq_res, rqstp);
L
Linus Torvalds 已提交
6548 6549
	if (status)
		goto out;
6550
	status = decode_putfh(xdr);
L
Linus Torvalds 已提交
6551 6552
	if (status)
		goto out;
6553
	status = decode_readdir(xdr, rqstp, res);
L
Linus Torvalds 已提交
6554 6555 6556 6557 6558 6559 6560
out:
	return status;
}

/*
 * Decode Read response
 */
6561
static int nfs4_xdr_dec_read(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6562
			     struct nfs_pgio_res *res)
L
Linus Torvalds 已提交
6563 6564 6565 6566
{
	struct compound_hdr hdr;
	int status;

6567
	status = decode_compound_hdr(xdr, &hdr);
6568 6569
	if (status)
		goto out;
6570
	status = decode_sequence(xdr, &res->seq_res, rqstp);
L
Linus Torvalds 已提交
6571 6572
	if (status)
		goto out;
6573
	status = decode_putfh(xdr);
L
Linus Torvalds 已提交
6574 6575
	if (status)
		goto out;
6576
	status = decode_read(xdr, rqstp, res);
L
Linus Torvalds 已提交
6577 6578 6579 6580 6581 6582 6583 6584 6585
	if (!status)
		status = res->count;
out:
	return status;
}

/*
 * Decode WRITE response
 */
6586
static int nfs4_xdr_dec_write(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6587
			      struct nfs_pgio_res *res)
L
Linus Torvalds 已提交
6588 6589 6590 6591
{
	struct compound_hdr hdr;
	int status;

6592
	status = decode_compound_hdr(xdr, &hdr);
6593 6594
	if (status)
		goto out;
6595
	status = decode_sequence(xdr, &res->seq_res, rqstp);
L
Linus Torvalds 已提交
6596 6597
	if (status)
		goto out;
6598
	status = decode_putfh(xdr);
L
Linus Torvalds 已提交
6599 6600
	if (status)
		goto out;
6601
	status = decode_write(xdr, res);
6602 6603
	if (status)
		goto out;
6604
	if (res->fattr)
6605
		decode_getfattr(xdr, res->fattr, res->server);
L
Linus Torvalds 已提交
6606 6607 6608 6609 6610 6611 6612 6613 6614
	if (!status)
		status = res->count;
out:
	return status;
}

/*
 * Decode COMMIT response
 */
6615
static int nfs4_xdr_dec_commit(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6616
			       struct nfs_commitres *res)
L
Linus Torvalds 已提交
6617 6618 6619 6620
{
	struct compound_hdr hdr;
	int status;

6621
	status = decode_compound_hdr(xdr, &hdr);
6622 6623
	if (status)
		goto out;
6624
	status = decode_sequence(xdr, &res->seq_res, rqstp);
L
Linus Torvalds 已提交
6625 6626
	if (status)
		goto out;
6627
	status = decode_putfh(xdr);
L
Linus Torvalds 已提交
6628 6629
	if (status)
		goto out;
6630
	status = decode_commit(xdr, res);
L
Linus Torvalds 已提交
6631 6632 6633 6634 6635
out:
	return status;
}

/*
6636
 * Decode FSINFO response
L
Linus Torvalds 已提交
6637
 */
6638
static int nfs4_xdr_dec_fsinfo(struct rpc_rqst *req, struct xdr_stream *xdr,
B
Benny Halevy 已提交
6639
			       struct nfs4_fsinfo_res *res)
L
Linus Torvalds 已提交
6640 6641 6642 6643
{
	struct compound_hdr hdr;
	int status;

6644
	status = decode_compound_hdr(xdr, &hdr);
6645
	if (!status)
6646
		status = decode_sequence(xdr, &res->seq_res, req);
L
Linus Torvalds 已提交
6647
	if (!status)
6648
		status = decode_putfh(xdr);
L
Linus Torvalds 已提交
6649
	if (!status)
6650
		status = decode_fsinfo(xdr, res->fsinfo);
L
Linus Torvalds 已提交
6651 6652 6653 6654
	return status;
}

/*
6655
 * Decode PATHCONF response
L
Linus Torvalds 已提交
6656
 */
6657
static int nfs4_xdr_dec_pathconf(struct rpc_rqst *req, struct xdr_stream *xdr,
B
Benny Halevy 已提交
6658
				 struct nfs4_pathconf_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_pathconf(xdr, res->pathconf);
L
Linus Torvalds 已提交
6670 6671 6672 6673
	return status;
}

/*
6674
 * Decode STATFS response
L
Linus Torvalds 已提交
6675
 */
6676
static int nfs4_xdr_dec_statfs(struct rpc_rqst *req, struct xdr_stream *xdr,
B
Benny Halevy 已提交
6677
			       struct nfs4_statfs_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_statfs(xdr, res->fsstat);
L
Linus Torvalds 已提交
6689 6690 6691 6692
	return status;
}

/*
6693
 * Decode GETATTR_BITMAP response
L
Linus Torvalds 已提交
6694
 */
6695 6696 6697
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
6698 6699 6700 6701
{
	struct compound_hdr hdr;
	int status;

6702
	status = decode_compound_hdr(xdr, &hdr);
6703 6704
	if (status)
		goto out;
6705
	status = decode_sequence(xdr, &res->seq_res, req);
6706
	if (status)
L
Linus Torvalds 已提交
6707
		goto out;
6708 6709
	status = decode_putfh(xdr);
	if (status)
L
Linus Torvalds 已提交
6710
		goto out;
6711
	status = decode_server_caps(xdr, res);
L
Linus Torvalds 已提交
6712 6713 6714 6715 6716 6717 6718
out:
	return status;
}

/*
 * Decode RENEW response
 */
6719 6720
static int nfs4_xdr_dec_renew(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
			      void *__unused)
L
Linus Torvalds 已提交
6721 6722 6723 6724
{
	struct compound_hdr hdr;
	int status;

6725
	status = decode_compound_hdr(xdr, &hdr);
L
Linus Torvalds 已提交
6726
	if (!status)
6727
		status = decode_renew(xdr);
L
Linus Torvalds 已提交
6728 6729 6730 6731
	return status;
}

/*
6732
 * Decode SETCLIENTID response
L
Linus Torvalds 已提交
6733
 */
6734 6735 6736
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
6737 6738 6739 6740
{
	struct compound_hdr hdr;
	int status;

6741
	status = decode_compound_hdr(xdr, &hdr);
L
Linus Torvalds 已提交
6742
	if (!status)
6743
		status = decode_setclientid(xdr, res);
L
Linus Torvalds 已提交
6744 6745 6746 6747
	return status;
}

/*
6748
 * Decode SETCLIENTID_CONFIRM response
L
Linus Torvalds 已提交
6749
 */
6750
static int nfs4_xdr_dec_setclientid_confirm(struct rpc_rqst *req,
6751
					    struct xdr_stream *xdr)
L
Linus Torvalds 已提交
6752 6753 6754 6755
{
	struct compound_hdr hdr;
	int status;

6756
	status = decode_compound_hdr(xdr, &hdr);
L
Linus Torvalds 已提交
6757
	if (!status)
6758
		status = decode_setclientid_confirm(xdr);
L
Linus Torvalds 已提交
6759 6760 6761 6762
	return status;
}

/*
6763
 * Decode DELEGRETURN response
L
Linus Torvalds 已提交
6764
 */
6765 6766 6767
static int nfs4_xdr_dec_delegreturn(struct rpc_rqst *rqstp,
				    struct xdr_stream *xdr,
				    struct nfs4_delegreturnres *res)
L
Linus Torvalds 已提交
6768 6769 6770 6771
{
	struct compound_hdr hdr;
	int status;

6772
	status = decode_compound_hdr(xdr, &hdr);
6773 6774
	if (status)
		goto out;
6775
	status = decode_sequence(xdr, &res->seq_res, rqstp);
6776
	if (status)
6777
		goto out;
6778
	status = decode_putfh(xdr);
6779 6780
	if (status != 0)
		goto out;
6781
	status = decode_getfattr(xdr, res->fattr, res->server);
6782 6783
	if (status != 0)
		goto out;
6784
	status = decode_delegreturn(xdr);
6785
out:
L
Linus Torvalds 已提交
6786 6787 6788
	return status;
}

6789
/*
6790
 * Decode FS_LOCATIONS response
6791
 */
6792 6793
static int nfs4_xdr_dec_fs_locations(struct rpc_rqst *req,
				     struct xdr_stream *xdr,
B
Benny Halevy 已提交
6794
				     struct nfs4_fs_locations_res *res)
6795 6796 6797 6798
{
	struct compound_hdr hdr;
	int status;

6799
	status = decode_compound_hdr(xdr, &hdr);
6800 6801
	if (status)
		goto out;
6802
	status = decode_sequence(xdr, &res->seq_res, req);
6803
	if (status)
6804
		goto out;
6805 6806
	status = decode_putfh(xdr);
	if (status)
6807
		goto out;
6808 6809 6810 6811
	if (res->migration) {
		xdr_enter_page(xdr, PAGE_SIZE);
		status = decode_getfattr_generic(xdr,
					&res->fs_locations->fattr,
6812
					 NULL, res->fs_locations,
6813
					 NULL, res->fs_locations->server);
6814 6815 6816 6817 6818 6819 6820 6821 6822 6823 6824 6825 6826 6827
		if (status)
			goto out;
		if (res->renew)
			status = decode_renew(xdr);
	} else {
		status = decode_lookup(xdr);
		if (status)
			goto out;
		xdr_enter_page(xdr, PAGE_SIZE);
		status = decode_getfattr_generic(xdr,
					&res->fs_locations->fattr,
					 NULL, res->fs_locations,
					 NULL, res->fs_locations->server);
	}
6828 6829 6830 6831
out:
	return status;
}

B
Bryan Schumaker 已提交
6832 6833 6834 6835 6836 6837 6838 6839 6840 6841 6842 6843 6844 6845 6846 6847 6848 6849 6850 6851 6852 6853 6854 6855
/*
 * 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;
}

6856 6857 6858 6859 6860 6861 6862 6863 6864 6865 6866 6867 6868 6869 6870 6871 6872 6873 6874 6875 6876 6877 6878 6879 6880 6881 6882 6883
/*
 * Decode FSID_PRESENT response
 */
static int nfs4_xdr_dec_fsid_present(struct rpc_rqst *rqstp,
				     struct xdr_stream *xdr,
				     struct nfs4_fsid_present_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_getfh(xdr, res->fh);
	if (status)
		goto out;
	if (res->renew)
		status = decode_renew(xdr);
out:
	return status;
}

B
Benny Halevy 已提交
6884
#if defined(CONFIG_NFS_V4_1)
6885 6886 6887 6888 6889 6890 6891 6892 6893 6894 6895 6896 6897 6898 6899 6900
/*
 * 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
6901
/*
6902
 * Decode EXCHANGE_ID response
B
Benny Halevy 已提交
6903
 */
6904 6905
static int nfs4_xdr_dec_exchange_id(struct rpc_rqst *rqstp,
				    struct xdr_stream *xdr,
B
Benny Halevy 已提交
6906 6907 6908 6909 6910
				    void *res)
{
	struct compound_hdr hdr;
	int status;

6911
	status = decode_compound_hdr(xdr, &hdr);
B
Benny Halevy 已提交
6912
	if (!status)
6913
		status = decode_exchange_id(xdr, res);
B
Benny Halevy 已提交
6914 6915
	return status;
}
A
Andy Adamson 已提交
6916

A
Andy Adamson 已提交
6917
/*
6918
 * Decode CREATE_SESSION response
A
Andy Adamson 已提交
6919
 */
6920 6921
static int nfs4_xdr_dec_create_session(struct rpc_rqst *rqstp,
				       struct xdr_stream *xdr,
A
Andy Adamson 已提交
6922 6923 6924 6925 6926
				       struct nfs41_create_session_res *res)
{
	struct compound_hdr hdr;
	int status;

6927
	status = decode_compound_hdr(xdr, &hdr);
A
Andy Adamson 已提交
6928
	if (!status)
6929
		status = decode_create_session(xdr, res);
A
Andy Adamson 已提交
6930 6931 6932
	return status;
}

A
Andy Adamson 已提交
6933
/*
6934
 * Decode DESTROY_SESSION response
A
Andy Adamson 已提交
6935
 */
6936 6937 6938
static int nfs4_xdr_dec_destroy_session(struct rpc_rqst *rqstp,
					struct xdr_stream *xdr,
					void *res)
A
Andy Adamson 已提交
6939 6940 6941 6942
{
	struct compound_hdr hdr;
	int status;

6943
	status = decode_compound_hdr(xdr, &hdr);
A
Andy Adamson 已提交
6944
	if (!status)
6945
		status = decode_destroy_session(xdr, res);
A
Andy Adamson 已提交
6946 6947 6948
	return status;
}

T
Trond Myklebust 已提交
6949 6950 6951 6952 6953 6954 6955 6956 6957 6958 6959 6960 6961 6962 6963 6964
/*
 * 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
6965
/*
6966
 * Decode SEQUENCE response
A
Andy Adamson 已提交
6967
 */
6968 6969
static int nfs4_xdr_dec_sequence(struct rpc_rqst *rqstp,
				 struct xdr_stream *xdr,
A
Andy Adamson 已提交
6970 6971 6972 6973 6974
				 struct nfs4_sequence_res *res)
{
	struct compound_hdr hdr;
	int status;

6975
	status = decode_compound_hdr(xdr, &hdr);
A
Andy Adamson 已提交
6976
	if (!status)
6977
		status = decode_sequence(xdr, res, rqstp);
A
Andy Adamson 已提交
6978 6979 6980
	return status;
}

A
Andy Adamson 已提交
6981
/*
6982
 * Decode GET_LEASE_TIME response
A
Andy Adamson 已提交
6983
 */
6984 6985
static int nfs4_xdr_dec_get_lease_time(struct rpc_rqst *rqstp,
				       struct xdr_stream *xdr,
A
Andy Adamson 已提交
6986 6987 6988 6989 6990
				       struct nfs4_get_lease_time_res *res)
{
	struct compound_hdr hdr;
	int status;

6991
	status = decode_compound_hdr(xdr, &hdr);
A
Andy Adamson 已提交
6992
	if (!status)
6993
		status = decode_sequence(xdr, &res->lr_seq_res, rqstp);
A
Andy Adamson 已提交
6994
	if (!status)
6995
		status = decode_putrootfh(xdr);
A
Andy Adamson 已提交
6996
	if (!status)
6997
		status = decode_fsinfo(xdr, res->lr_fsinfo);
A
Andy Adamson 已提交
6998 6999
	return status;
}
7000 7001 7002 7003

/*
 * Decode RECLAIM_COMPLETE response
 */
7004 7005
static int nfs4_xdr_dec_reclaim_complete(struct rpc_rqst *rqstp,
					 struct xdr_stream *xdr,
7006 7007 7008 7009 7010
					 struct nfs41_reclaim_complete_res *res)
{
	struct compound_hdr hdr;
	int status;

7011
	status = decode_compound_hdr(xdr, &hdr);
7012
	if (!status)
7013
		status = decode_sequence(xdr, &res->seq_res, rqstp);
7014
	if (!status)
H
Himangi Saraogi 已提交
7015
		status = decode_reclaim_complete(xdr, NULL);
7016 7017
	return status;
}
7018 7019 7020 7021

/*
 * Decode GETDEVINFO response
 */
7022 7023
static int nfs4_xdr_dec_getdeviceinfo(struct rpc_rqst *rqstp,
				      struct xdr_stream *xdr,
7024 7025 7026 7027 7028
				      struct nfs4_getdeviceinfo_res *res)
{
	struct compound_hdr hdr;
	int status;

7029
	status = decode_compound_hdr(xdr, &hdr);
7030 7031
	if (status != 0)
		goto out;
7032
	status = decode_sequence(xdr, &res->seq_res, rqstp);
7033 7034
	if (status != 0)
		goto out;
7035
	status = decode_getdeviceinfo(xdr, res->pdev);
7036 7037 7038 7039 7040 7041 7042
out:
	return status;
}

/*
 * Decode LAYOUTGET response
 */
7043 7044
static int nfs4_xdr_dec_layoutget(struct rpc_rqst *rqstp,
				  struct xdr_stream *xdr,
7045 7046 7047 7048 7049
				  struct nfs4_layoutget_res *res)
{
	struct compound_hdr hdr;
	int status;

7050
	status = decode_compound_hdr(xdr, &hdr);
7051 7052
	if (status)
		goto out;
7053
	status = decode_sequence(xdr, &res->seq_res, rqstp);
7054 7055
	if (status)
		goto out;
7056
	status = decode_putfh(xdr);
7057 7058
	if (status)
		goto out;
7059
	status = decode_layoutget(xdr, rqstp, res);
7060 7061 7062
out:
	return status;
}
A
Andy Adamson 已提交
7063

B
Benny Halevy 已提交
7064 7065 7066 7067 7068 7069 7070 7071 7072 7073 7074 7075 7076 7077 7078 7079 7080 7081 7082 7083 7084 7085 7086 7087
/*
 * 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
7088 7089 7090 7091 7092 7093 7094 7095 7096 7097 7098 7099 7100 7101 7102 7103 7104 7105 7106 7107 7108 7109
/*
 * 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;
7110
	decode_getfattr(xdr, res->fattr, res->server);
A
Andy Adamson 已提交
7111 7112 7113
out:
	return status;
}
7114 7115 7116 7117 7118 7119 7120 7121 7122 7123 7124 7125 7126 7127 7128 7129 7130 7131 7132 7133

/*
 * 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
7134
	status = decode_secinfo_no_name(xdr, res);
7135 7136 7137
out:
	return status;
}
B
Bryan Schumaker 已提交
7138 7139 7140 7141 7142 7143 7144 7145 7146 7147 7148 7149 7150 7151 7152 7153 7154 7155 7156 7157 7158

/*
 * 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
7159 7160 7161 7162 7163 7164 7165 7166 7167 7168 7169 7170 7171 7172 7173 7174 7175 7176 7177 7178 7179

/*
 * 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
7180 7181
#endif /* CONFIG_NFS_V4_1 */

7182 7183 7184 7185 7186 7187 7188 7189 7190 7191 7192 7193 7194 7195 7196 7197
/**
 * 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
7198
{
7199
	unsigned int savep;
7200
	uint32_t bitmap[3] = {0};
L
Linus Torvalds 已提交
7201
	uint32_t len;
7202 7203 7204
	__be32 *p = xdr_inline_decode(xdr, 4);
	if (unlikely(!p))
		goto out_overflow;
7205
	if (*p == xdr_zero) {
7206 7207 7208
		p = xdr_inline_decode(xdr, 4);
		if (unlikely(!p))
			goto out_overflow;
7209
		if (*p == xdr_zero)
7210
			return -EAGAIN;
L
Linus Torvalds 已提交
7211
		entry->eof = 1;
7212
		return -EBADCOOKIE;
L
Linus Torvalds 已提交
7213 7214
	}

7215 7216 7217
	p = xdr_inline_decode(xdr, 12);
	if (unlikely(!p))
		goto out_overflow;
L
Linus Torvalds 已提交
7218 7219
	entry->prev_cookie = entry->cookie;
	p = xdr_decode_hyper(p, &entry->cookie);
7220
	entry->len = be32_to_cpup(p);
7221

7222
	p = xdr_inline_decode(xdr, entry->len);
7223 7224
	if (unlikely(!p))
		goto out_overflow;
L
Linus Torvalds 已提交
7225 7226 7227 7228 7229 7230 7231 7232
	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;
7233
	entry->fattr->valid = 0;
L
Linus Torvalds 已提交
7234

7235 7236 7237
	if (decode_attr_bitmap(xdr, bitmap) < 0)
		goto out_overflow;

7238
	if (decode_attr_length(xdr, &len, &savep) < 0)
7239 7240
		goto out_overflow;

7241
	if (decode_getfattr_attrs(xdr, bitmap, entry->fattr, entry->fh,
7242
			NULL, entry->label, entry->server) < 0)
7243
		goto out_overflow;
7244 7245 7246
	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)
7247 7248
		entry->ino = entry->fattr->fileid;

7249 7250 7251 7252
	entry->d_type = DT_UNKNOWN;
	if (entry->fattr->valid & NFS_ATTR_FATTR_TYPE)
		entry->d_type = nfs_umode_to_dtype(entry->fattr->mode);

7253
	return 0;
7254 7255 7256

out_overflow:
	print_overflow_msg(__func__, xdr);
7257
	return -EAGAIN;
L
Linus Torvalds 已提交
7258 7259 7260 7261 7262 7263 7264 7265 7266 7267 7268
}

/*
 * 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		},
7269 7270 7271 7272 7273 7274 7275 7276 7277 7278 7279 7280 7281 7282 7283 7284 7285 7286 7287 7288 7289 7290
	{ 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	},
7291
	{ NFS4ERR_SERVERFAULT,	-EREMOTEIO	},
7292 7293 7294 7295 7296 7297
	{ NFS4ERR_BADTYPE,	-EBADTYPE	},
	{ NFS4ERR_LOCKED,	-EAGAIN		},
	{ NFS4ERR_SYMLINK,	-ELOOP		},
	{ NFS4ERR_OP_ILLEGAL,	-EOPNOTSUPP	},
	{ NFS4ERR_DEADLOCK,	-EDEADLK	},
	{ -1,			-EIO		}
L
Linus Torvalds 已提交
7298 7299 7300 7301 7302 7303 7304
};

/*
 * Convert an NFS error code to a local one.
 * This one is used jointly by NFSv2 and NFSv3.
 */
static int
7305
nfs4_stat_to_errno(int stat)
L
Linus Torvalds 已提交
7306 7307 7308 7309 7310 7311 7312 7313
{
	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. */
7314
		return -EREMOTEIO;
L
Linus Torvalds 已提交
7315 7316 7317 7318 7319 7320
	}
	/* 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.
	 */
7321
	return -stat;
L
Linus Torvalds 已提交
7322 7323
}

A
Anna Schumaker 已提交
7324 7325 7326 7327
#ifdef CONFIG_NFS_V4_2
#include "nfs42xdr.c"
#endif /* CONFIG_NFS_V4_2 */

L
Linus Torvalds 已提交
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),
7376
	PROC(FSID_PRESENT,	enc_fsid_present,	dec_fsid_present),
B
Benny Halevy 已提交
7377
#if defined(CONFIG_NFS_V4_1)
7378 7379 7380 7381 7382 7383 7384 7385
	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
7386
	PROC(LAYOUTCOMMIT,	enc_layoutcommit,	dec_layoutcommit),
B
Benny Halevy 已提交
7387
	PROC(LAYOUTRETURN,	enc_layoutreturn,	dec_layoutreturn),
7388
	PROC(SECINFO_NO_NAME,	enc_secinfo_no_name,	dec_secinfo_no_name),
B
Bryan Schumaker 已提交
7389
	PROC(TEST_STATEID,	enc_test_stateid,	dec_test_stateid),
B
Bryan Schumaker 已提交
7390
	PROC(FREE_STATEID,	enc_free_stateid,	dec_free_stateid),
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 */
A
Anna Schumaker 已提交
7395 7396 7397
#ifdef CONFIG_NFS_V4_2
	PROC(SEEK,		enc_seek,		dec_seek),
#endif /* CONFIG_NFS_V4_2 */
L
Linus Torvalds 已提交
7398 7399
};

7400
const struct rpc_version nfs_version4 = {
L
Linus Torvalds 已提交
7401
	.number			= 4,
7402
	.nrprocs		= ARRAY_SIZE(nfs4_procedures),
L
Linus Torvalds 已提交
7403 7404 7405 7406 7407 7408 7409 7410
	.procs			= nfs4_procedures
};

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