nfs4xdr.c 116.2 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/slab.h>
#include <linux/utsname.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>
#include <linux/sunrpc/clnt.h>
#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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#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 + 4)
#define lock_owner_id_maxsz	(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 3
#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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/* 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 + nfs4_group_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 + \
				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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#define decode_fsinfo_maxsz	(op_decode_hdr_maxsz + 11)
#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)
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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 + \
				 2 + encode_verifier_maxsz + 5)
#define decode_readdir_maxsz	(op_decode_hdr_maxsz + \
				 decode_verifier_maxsz)
#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)
#define encode_rename_maxsz	(op_encode_hdr_maxsz + \
				2 * nfs4_name_maxsz)
#define decode_rename_maxsz	(op_decode_hdr_maxsz + 5 + 5)
#define encode_link_maxsz	(op_encode_hdr_maxsz + \
				nfs4_name_maxsz)
#define decode_link_maxsz	(op_decode_hdr_maxsz + 5)
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#define encode_lock_maxsz	(op_encode_hdr_maxsz + \
				 7 + \
				 1 + encode_stateid_maxsz + 8)
#define decode_lock_denied_maxsz \
				(8 + decode_lockowner_maxsz)
#define decode_lock_maxsz	(op_decode_hdr_maxsz + \
				 decode_lock_denied_maxsz)
#define encode_lockt_maxsz	(op_encode_hdr_maxsz + 12)
#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)
#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 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 + \
				encode_putfh_maxsz + \
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				encode_read_maxsz)
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#define NFS4_dec_read_sz	(compound_decode_hdr_maxsz + \
				decode_putfh_maxsz + \
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				decode_read_maxsz)
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#define NFS4_enc_readlink_sz	(compound_encode_hdr_maxsz + \
				encode_putfh_maxsz + \
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				encode_readlink_maxsz)
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#define NFS4_dec_readlink_sz	(compound_decode_hdr_maxsz + \
				decode_putfh_maxsz + \
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				decode_readlink_maxsz)
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#define NFS4_enc_readdir_sz	(compound_encode_hdr_maxsz + \
				encode_putfh_maxsz + \
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				encode_readdir_maxsz)
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#define NFS4_dec_readdir_sz	(compound_decode_hdr_maxsz + \
				decode_putfh_maxsz + \
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				decode_readdir_maxsz)
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#define NFS4_enc_write_sz	(compound_encode_hdr_maxsz + \
				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 + \
				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 + \
				encode_putfh_maxsz + \
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				encode_commit_maxsz + \
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				encode_getattr_maxsz)
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#define NFS4_dec_commit_sz	(compound_decode_hdr_maxsz + \
				decode_putfh_maxsz + \
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				decode_commit_maxsz + \
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				decode_getattr_maxsz)
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#define NFS4_enc_open_sz        (compound_encode_hdr_maxsz + \
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				encode_putfh_maxsz + \
				encode_savefh_maxsz + \
				encode_open_maxsz + \
				encode_getfh_maxsz + \
				encode_getattr_maxsz + \
				encode_restorefh_maxsz + \
				encode_getattr_maxsz)
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#define NFS4_dec_open_sz        (compound_decode_hdr_maxsz + \
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				decode_putfh_maxsz + \
				decode_savefh_maxsz + \
				decode_open_maxsz + \
				decode_getfh_maxsz + \
				decode_getattr_maxsz + \
				decode_restorefh_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 + \
					encode_putfh_maxsz + \
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					encode_open_maxsz + \
					encode_getattr_maxsz)
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#define NFS4_dec_open_noattr_sz	(compound_decode_hdr_maxsz + \
					decode_putfh_maxsz + \
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					decode_open_maxsz + \
					decode_getattr_maxsz)
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#define NFS4_enc_open_downgrade_sz \
				(compound_encode_hdr_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_putfh_maxsz + \
				 decode_open_downgrade_maxsz + \
				 decode_getattr_maxsz)
#define NFS4_enc_close_sz	(compound_encode_hdr_maxsz + \
				 encode_putfh_maxsz + \
				 encode_close_maxsz + \
				 encode_getattr_maxsz)
#define NFS4_dec_close_sz	(compound_decode_hdr_maxsz + \
				 decode_putfh_maxsz + \
				 decode_close_maxsz + \
				 decode_getattr_maxsz)
#define NFS4_enc_setattr_sz	(compound_encode_hdr_maxsz + \
				 encode_putfh_maxsz + \
				 encode_setattr_maxsz + \
				 encode_getattr_maxsz)
#define NFS4_dec_setattr_sz	(compound_decode_hdr_maxsz + \
				 decode_putfh_maxsz + \
				 decode_setattr_maxsz + \
				 decode_getattr_maxsz)
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#define NFS4_enc_fsinfo_sz	(compound_encode_hdr_maxsz + \
				encode_putfh_maxsz + \
				encode_fsinfo_maxsz)
#define NFS4_dec_fsinfo_sz	(compound_decode_hdr_maxsz + \
				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 + \
				encode_setclientid_confirm_maxsz + \
				encode_putrootfh_maxsz + \
				encode_fsinfo_maxsz)
#define NFS4_dec_setclientid_confirm_sz \
				(compound_decode_hdr_maxsz + \
				decode_setclientid_confirm_maxsz + \
				decode_putrootfh_maxsz + \
				decode_fsinfo_maxsz)
#define NFS4_enc_lock_sz        (compound_encode_hdr_maxsz + \
				encode_putfh_maxsz + \
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				encode_lock_maxsz)
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#define NFS4_dec_lock_sz        (compound_decode_hdr_maxsz + \
				decode_putfh_maxsz + \
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				decode_lock_maxsz)
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#define NFS4_enc_lockt_sz       (compound_encode_hdr_maxsz + \
				encode_putfh_maxsz + \
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				encode_lockt_maxsz)
#define NFS4_dec_lockt_sz       (compound_decode_hdr_maxsz + \
				 decode_putfh_maxsz + \
				 decode_lockt_maxsz)
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#define NFS4_enc_locku_sz       (compound_encode_hdr_maxsz + \
				encode_putfh_maxsz + \
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				encode_locku_maxsz)
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#define NFS4_dec_locku_sz       (compound_decode_hdr_maxsz + \
				decode_putfh_maxsz + \
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				decode_locku_maxsz)
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#define NFS4_enc_access_sz	(compound_encode_hdr_maxsz + \
				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 + \
				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 + \
				encode_putfh_maxsz + \
				encode_getattr_maxsz)
#define NFS4_dec_getattr_sz	(compound_decode_hdr_maxsz + \
				decode_putfh_maxsz + \
				decode_getattr_maxsz)
#define NFS4_enc_lookup_sz	(compound_encode_hdr_maxsz + \
				encode_putfh_maxsz + \
				encode_lookup_maxsz + \
				encode_getattr_maxsz + \
				encode_getfh_maxsz)
#define NFS4_dec_lookup_sz	(compound_decode_hdr_maxsz + \
				decode_putfh_maxsz + \
400
				decode_lookup_maxsz + \
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				decode_getattr_maxsz + \
				decode_getfh_maxsz)
#define NFS4_enc_lookup_root_sz (compound_encode_hdr_maxsz + \
				encode_putrootfh_maxsz + \
				encode_getattr_maxsz + \
				encode_getfh_maxsz)
#define NFS4_dec_lookup_root_sz (compound_decode_hdr_maxsz + \
				decode_putrootfh_maxsz + \
				decode_getattr_maxsz + \
				decode_getfh_maxsz)
#define NFS4_enc_remove_sz	(compound_encode_hdr_maxsz + \
				encode_putfh_maxsz + \
413 414
				encode_remove_maxsz + \
				encode_getattr_maxsz)
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#define NFS4_dec_remove_sz	(compound_decode_hdr_maxsz + \
				decode_putfh_maxsz + \
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				op_decode_hdr_maxsz + 5 + \
				decode_getattr_maxsz)
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#define NFS4_enc_rename_sz	(compound_encode_hdr_maxsz + \
				encode_putfh_maxsz + \
				encode_savefh_maxsz + \
				encode_putfh_maxsz + \
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				encode_rename_maxsz + \
				encode_getattr_maxsz + \
				encode_restorefh_maxsz + \
				encode_getattr_maxsz)
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#define NFS4_dec_rename_sz	(compound_decode_hdr_maxsz + \
				decode_putfh_maxsz + \
				decode_savefh_maxsz + \
				decode_putfh_maxsz + \
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				decode_rename_maxsz + \
				decode_getattr_maxsz + \
				decode_restorefh_maxsz + \
				decode_getattr_maxsz)
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#define NFS4_enc_link_sz	(compound_encode_hdr_maxsz + \
				encode_putfh_maxsz + \
				encode_savefh_maxsz + \
				encode_putfh_maxsz + \
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				encode_link_maxsz + \
				decode_getattr_maxsz + \
				encode_restorefh_maxsz + \
				decode_getattr_maxsz)
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#define NFS4_dec_link_sz	(compound_decode_hdr_maxsz + \
				decode_putfh_maxsz + \
				decode_savefh_maxsz + \
				decode_putfh_maxsz + \
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				decode_link_maxsz + \
				decode_getattr_maxsz + \
				decode_restorefh_maxsz + \
				decode_getattr_maxsz)
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#define NFS4_enc_symlink_sz	(compound_encode_hdr_maxsz + \
				encode_putfh_maxsz + \
				encode_symlink_maxsz + \
				encode_getattr_maxsz + \
				encode_getfh_maxsz)
#define NFS4_dec_symlink_sz	(compound_decode_hdr_maxsz + \
				decode_putfh_maxsz + \
				decode_symlink_maxsz + \
				decode_getattr_maxsz + \
				decode_getfh_maxsz)
#define NFS4_enc_create_sz	(compound_encode_hdr_maxsz + \
				encode_putfh_maxsz + \
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				encode_savefh_maxsz + \
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				encode_create_maxsz + \
465
				encode_getfh_maxsz + \
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				encode_getattr_maxsz + \
467 468
				encode_restorefh_maxsz + \
				encode_getattr_maxsz)
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#define NFS4_dec_create_sz	(compound_decode_hdr_maxsz + \
				decode_putfh_maxsz + \
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				decode_savefh_maxsz + \
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				decode_create_maxsz + \
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				decode_getfh_maxsz + \
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				decode_getattr_maxsz + \
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				decode_restorefh_maxsz + \
				decode_getattr_maxsz)
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#define NFS4_enc_pathconf_sz	(compound_encode_hdr_maxsz + \
				encode_putfh_maxsz + \
				encode_getattr_maxsz)
#define NFS4_dec_pathconf_sz	(compound_decode_hdr_maxsz + \
				decode_putfh_maxsz + \
				decode_getattr_maxsz)
#define NFS4_enc_statfs_sz	(compound_encode_hdr_maxsz + \
				encode_putfh_maxsz + \
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				encode_statfs_maxsz)
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#define NFS4_dec_statfs_sz	(compound_decode_hdr_maxsz + \
				decode_putfh_maxsz + \
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				decode_statfs_maxsz)
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#define NFS4_enc_server_caps_sz (compound_encode_hdr_maxsz + \
490
				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_putfh_maxsz + \
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				decode_getattr_maxsz)
#define NFS4_enc_delegreturn_sz	(compound_encode_hdr_maxsz + \
				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_delegreturn_maxsz + \
				decode_getattr_maxsz)
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#define NFS4_enc_getacl_sz	(compound_encode_hdr_maxsz + \
				encode_putfh_maxsz + \
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				encode_getacl_maxsz)
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#define NFS4_dec_getacl_sz	(compound_decode_hdr_maxsz + \
				decode_putfh_maxsz + \
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				decode_getacl_maxsz)
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#define NFS4_enc_setacl_sz	(compound_encode_hdr_maxsz + \
				encode_putfh_maxsz + \
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				encode_setacl_maxsz)
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#define NFS4_dec_setacl_sz	(compound_decode_hdr_maxsz + \
				decode_putfh_maxsz + \
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				decode_setacl_maxsz)
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#define NFS4_enc_fs_locations_sz \
				(compound_encode_hdr_maxsz + \
				 encode_putfh_maxsz + \
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				 encode_lookup_maxsz + \
				 encode_fs_locations_maxsz)
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#define NFS4_dec_fs_locations_sz \
				(compound_decode_hdr_maxsz + \
				 decode_putfh_maxsz + \
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				 decode_lookup_maxsz + \
				 decode_fs_locations_maxsz)
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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;
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	__be32 *	nops_p;
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	uint32_t	taglen;
	char *		tag;
};

/*
 * START OF "GENERIC" ENCODE ROUTINES.
 *   These may look a little ugly since they are imported from a "generic"
 * set of XDR encode/decode routines which are intended to be shared by
 * all of our NFSv4 implementations (OpenBSD, MacOS X...).
 *
 * If the pain of reading these is too great, it should be a straightforward
 * task to translate them into Linux-specific versions which are more
 * consistent with the style used in NFSv2/v3...
 */
#define WRITE32(n)               *p++ = htonl(n)
#define WRITE64(n)               do {				\
	*p++ = htonl((uint32_t)((n) >> 32));				\
	*p++ = htonl((uint32_t)(n));					\
} while (0)
#define WRITEMEM(ptr,nbytes)     do {				\
	p = xdr_encode_opaque_fixed(p, ptr, nbytes);		\
} while (0)

#define RESERVE_SPACE(nbytes)	do {				\
	p = xdr_reserve_space(xdr, nbytes);			\
	BUG_ON(!p);						\
} while (0)

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

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static void encode_compound_hdr(struct xdr_stream *xdr, struct compound_hdr *hdr)
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{
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	__be32 *p;
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	dprintk("encode_compound: tag=%.*s\n", (int)hdr->taglen, hdr->tag);
	BUG_ON(hdr->taglen > NFS4_MAXTAGLEN);
	RESERVE_SPACE(12+(XDR_QUADLEN(hdr->taglen)<<2));
	WRITE32(hdr->taglen);
	WRITEMEM(hdr->tag, hdr->taglen);
	WRITE32(NFS4_MINOR_VERSION);
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	hdr->nops_p = p;
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	WRITE32(hdr->nops);
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}

static void encode_nops(struct compound_hdr *hdr)
{
	*hdr->nops_p = htonl(hdr->nops);
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}

static void encode_nfs4_verifier(struct xdr_stream *xdr, const nfs4_verifier *verf)
{
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	__be32 *p;
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	p = xdr_reserve_space(xdr, NFS4_VERIFIER_SIZE);
	BUG_ON(p == NULL);
	xdr_encode_opaque_fixed(p, verf->data, NFS4_VERIFIER_SIZE);
}

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static void encode_attrs(struct xdr_stream *xdr, const struct iattr *iap, 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;
	__be32 *q;
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	int len;
	uint32_t bmval0 = 0;
	uint32_t bmval1 = 0;

	/*
	 * We reserve enough space to write the entire attribute buffer at once.
	 * In the worst-case, this would be
	 *   12(bitmap) + 4(attrlen) + 8(size) + 4(mode) + 4(atime) + 4(mtime)
	 *          = 36 bytes, plus any contribution from variable-length fields
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	 *            such as owner/group.
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	 */
	len = 16;

	/* Sigh */
	if (iap->ia_valid & ATTR_SIZE)
		len += 8;
	if (iap->ia_valid & ATTR_MODE)
		len += 4;
	if (iap->ia_valid & ATTR_UID) {
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		owner_namelen = nfs_map_uid_to_name(server->nfs_client, iap->ia_uid, owner_name);
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		if (owner_namelen < 0) {
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			dprintk("nfs: couldn't resolve uid %d to string\n",
					iap->ia_uid);
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			/* XXX */
			strcpy(owner_name, "nobody");
			owner_namelen = sizeof("nobody") - 1;
			/* goto out; */
		}
		len += 4 + (XDR_QUADLEN(owner_namelen) << 2);
	}
	if (iap->ia_valid & ATTR_GID) {
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		owner_grouplen = nfs_map_gid_to_group(server->nfs_client, iap->ia_gid, owner_group);
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		if (owner_grouplen < 0) {
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			dprintk("nfs: couldn't resolve gid %d to string\n",
					iap->ia_gid);
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			strcpy(owner_group, "nobody");
			owner_grouplen = sizeof("nobody") - 1;
			/* goto out; */
		}
		len += 4 + (XDR_QUADLEN(owner_grouplen) << 2);
	}
	if (iap->ia_valid & ATTR_ATIME_SET)
		len += 16;
	else if (iap->ia_valid & ATTR_ATIME)
		len += 4;
	if (iap->ia_valid & ATTR_MTIME_SET)
		len += 16;
	else if (iap->ia_valid & ATTR_MTIME)
		len += 4;
	RESERVE_SPACE(len);

	/*
	 * We write the bitmap length now, but leave the bitmap and the attribute
	 * buffer length to be backfilled at the end of this routine.
	 */
	WRITE32(2);
	q = p;
	p += 3;

	if (iap->ia_valid & ATTR_SIZE) {
		bmval0 |= FATTR4_WORD0_SIZE;
		WRITE64(iap->ia_size);
	}
	if (iap->ia_valid & ATTR_MODE) {
		bmval1 |= FATTR4_WORD1_MODE;
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		WRITE32(iap->ia_mode & S_IALLUGO);
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	}
	if (iap->ia_valid & ATTR_UID) {
		bmval1 |= FATTR4_WORD1_OWNER;
		WRITE32(owner_namelen);
		WRITEMEM(owner_name, owner_namelen);
	}
	if (iap->ia_valid & ATTR_GID) {
		bmval1 |= FATTR4_WORD1_OWNER_GROUP;
		WRITE32(owner_grouplen);
		WRITEMEM(owner_group, owner_grouplen);
	}
	if (iap->ia_valid & ATTR_ATIME_SET) {
		bmval1 |= FATTR4_WORD1_TIME_ACCESS_SET;
		WRITE32(NFS4_SET_TO_CLIENT_TIME);
		WRITE32(0);
		WRITE32(iap->ia_mtime.tv_sec);
		WRITE32(iap->ia_mtime.tv_nsec);
	}
	else if (iap->ia_valid & ATTR_ATIME) {
		bmval1 |= FATTR4_WORD1_TIME_ACCESS_SET;
		WRITE32(NFS4_SET_TO_SERVER_TIME);
	}
	if (iap->ia_valid & ATTR_MTIME_SET) {
		bmval1 |= FATTR4_WORD1_TIME_MODIFY_SET;
		WRITE32(NFS4_SET_TO_CLIENT_TIME);
		WRITE32(0);
		WRITE32(iap->ia_mtime.tv_sec);
		WRITE32(iap->ia_mtime.tv_nsec);
	}
	else if (iap->ia_valid & ATTR_MTIME) {
		bmval1 |= FATTR4_WORD1_TIME_MODIFY_SET;
		WRITE32(NFS4_SET_TO_SERVER_TIME);
	}
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	/*
	 * Now we backfill the bitmap and the attribute buffer length.
	 */
	if (len != ((char *)p - (char *)q) + 4) {
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		printk(KERN_ERR "nfs: Attr length error, %u != %Zu\n",
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				len, ((char *)p - (char *)q) + 4);
		BUG();
	}
	len = (char *)p - (char *)q - 12;
	*q++ = htonl(bmval0);
	*q++ = htonl(bmval1);
	*q++ = htonl(len);

/* out: */
}

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static void encode_access(struct xdr_stream *xdr, u32 access, struct compound_hdr *hdr)
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{
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	__be32 *p;
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	RESERVE_SPACE(8);
	WRITE32(OP_ACCESS);
	WRITE32(access);
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	hdr->nops++;
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}

741
static void encode_close(struct xdr_stream *xdr, const struct nfs_closeargs *arg, struct compound_hdr *hdr)
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{
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	__be32 *p;
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	RESERVE_SPACE(8+NFS4_STATEID_SIZE);
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	WRITE32(OP_CLOSE);
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	WRITE32(arg->seqid->sequence->counter);
748
	WRITEMEM(arg->stateid->data, NFS4_STATEID_SIZE);
749
	hdr->nops++;
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}

752
static void encode_commit(struct xdr_stream *xdr, const struct nfs_writeargs *args, struct compound_hdr *hdr)
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{
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	__be32 *p;
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	RESERVE_SPACE(16);
	WRITE32(OP_COMMIT);
	WRITE64(args->offset);
	WRITE32(args->count);
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	hdr->nops++;
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}

763
static void encode_create(struct xdr_stream *xdr, const struct nfs4_create_arg *create, struct compound_hdr *hdr)
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{
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	__be32 *p;
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	RESERVE_SPACE(8);
	WRITE32(OP_CREATE);
	WRITE32(create->ftype);

	switch (create->ftype) {
	case NF4LNK:
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		RESERVE_SPACE(4);
		WRITE32(create->u.symlink.len);
		xdr_write_pages(xdr, create->u.symlink.pages, 0, create->u.symlink.len);
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		break;

	case NF4BLK: case NF4CHR:
		RESERVE_SPACE(8);
		WRITE32(create->u.device.specdata1);
		WRITE32(create->u.device.specdata2);
		break;

	default:
		break;
	}

	RESERVE_SPACE(4 + create->name->len);
	WRITE32(create->name->len);
	WRITEMEM(create->name->name, create->name->len);
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	hdr->nops++;
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	encode_attrs(xdr, create->attrs, create->server);
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}

796
static void encode_getattr_one(struct xdr_stream *xdr, uint32_t bitmap, struct compound_hdr *hdr)
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{
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	__be32 *p;
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	RESERVE_SPACE(12);
	WRITE32(OP_GETATTR);
	WRITE32(1);
	WRITE32(bitmap);
804
	hdr->nops++;
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}

807
static void encode_getattr_two(struct xdr_stream *xdr, uint32_t bm0, uint32_t bm1, struct compound_hdr *hdr)
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{
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	__be32 *p;
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	RESERVE_SPACE(16);
	WRITE32(OP_GETATTR);
	WRITE32(2);
	WRITE32(bm0);
	WRITE32(bm1);
816
	hdr->nops++;
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}

819
static void encode_getfattr(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
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{
821 822
	encode_getattr_two(xdr, bitmask[0] & nfs4_fattr_bitmap[0],
			   bitmask[1] & nfs4_fattr_bitmap[1], hdr);
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}

825
static void encode_fsinfo(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
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{
827 828
	encode_getattr_two(xdr, bitmask[0] & nfs4_fsinfo_bitmap[0],
			   bitmask[1] & nfs4_fsinfo_bitmap[1], hdr);
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}

831
static void encode_fs_locations(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
832
{
833 834
	encode_getattr_two(xdr, bitmask[0] & nfs4_fs_locations_bitmap[0],
			   bitmask[1] & nfs4_fs_locations_bitmap[1], hdr);
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}

837
static void encode_getfh(struct xdr_stream *xdr, struct compound_hdr *hdr)
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{
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	__be32 *p;
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	RESERVE_SPACE(4);
	WRITE32(OP_GETFH);
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	hdr->nops++;
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}

846
static void encode_link(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
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{
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	__be32 *p;
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	RESERVE_SPACE(8 + name->len);
	WRITE32(OP_LINK);
	WRITE32(name->len);
	WRITEMEM(name->name, name->len);
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	hdr->nops++;
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}

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static inline int nfs4_lock_type(struct file_lock *fl, int block)
{
	if ((fl->fl_type & (F_RDLCK|F_WRLCK|F_UNLCK)) == F_RDLCK)
		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;
}

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/*
 * opcode,type,reclaim,offset,length,new_lock_owner = 32
 * open_seqid,open_stateid,lock_seqid,lock_owner.clientid, lock_owner.id = 40
 */
875
static void encode_lock(struct xdr_stream *xdr, const struct nfs_lock_args *args, struct compound_hdr *hdr)
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{
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	__be32 *p;
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	RESERVE_SPACE(32);
	WRITE32(OP_LOCK);
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	WRITE32(nfs4_lock_type(args->fl, args->block));
	WRITE32(args->reclaim);
	WRITE64(args->fl->fl_start);
	WRITE64(nfs4_lock_length(args->fl));
	WRITE32(args->new_lock_owner);
	if (args->new_lock_owner){
887
		RESERVE_SPACE(4+NFS4_STATEID_SIZE+32);
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		WRITE32(args->open_seqid->sequence->counter);
889
		WRITEMEM(args->open_stateid->data, NFS4_STATEID_SIZE);
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		WRITE32(args->lock_seqid->sequence->counter);
		WRITE64(args->lock_owner.clientid);
892 893 894
		WRITE32(16);
		WRITEMEM("lock id:", 8);
		WRITE64(args->lock_owner.id);
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	}
	else {
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		RESERVE_SPACE(NFS4_STATEID_SIZE+4);
		WRITEMEM(args->lock_stateid->data, NFS4_STATEID_SIZE);
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		WRITE32(args->lock_seqid->sequence->counter);
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	}
901
	hdr->nops++;
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}

904
static void encode_lockt(struct xdr_stream *xdr, const struct nfs_lockt_args *args, struct compound_hdr *hdr)
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{
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	__be32 *p;
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908
	RESERVE_SPACE(52);
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	WRITE32(OP_LOCKT);
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	WRITE32(nfs4_lock_type(args->fl, 0));
	WRITE64(args->fl->fl_start);
	WRITE64(nfs4_lock_length(args->fl));
	WRITE64(args->lock_owner.clientid);
914 915 916
	WRITE32(16);
	WRITEMEM("lock id:", 8);
	WRITE64(args->lock_owner.id);
917
	hdr->nops++;
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}

920
static void encode_locku(struct xdr_stream *xdr, const struct nfs_locku_args *args, struct compound_hdr *hdr)
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{
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	__be32 *p;
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	RESERVE_SPACE(12+NFS4_STATEID_SIZE+16);
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	WRITE32(OP_LOCKU);
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	WRITE32(nfs4_lock_type(args->fl, 0));
	WRITE32(args->seqid->sequence->counter);
928
	WRITEMEM(args->stateid->data, NFS4_STATEID_SIZE);
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	WRITE64(args->fl->fl_start);
	WRITE64(nfs4_lock_length(args->fl));
931
	hdr->nops++;
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}

934
static void encode_lookup(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
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{
	int len = name->len;
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	__be32 *p;
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	RESERVE_SPACE(8 + len);
	WRITE32(OP_LOOKUP);
	WRITE32(len);
	WRITEMEM(name->name, len);
943
	hdr->nops++;
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}

946
static void encode_share_access(struct xdr_stream *xdr, fmode_t fmode)
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{
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	__be32 *p;
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	RESERVE_SPACE(8);
951
	switch (fmode & (FMODE_READ|FMODE_WRITE)) {
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	case FMODE_READ:
		WRITE32(NFS4_SHARE_ACCESS_READ);
		break;
	case FMODE_WRITE:
		WRITE32(NFS4_SHARE_ACCESS_WRITE);
		break;
	case FMODE_READ|FMODE_WRITE:
		WRITE32(NFS4_SHARE_ACCESS_BOTH);
		break;
	default:
		WRITE32(0);
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	}
	WRITE32(0);		/* for linux, share_deny = 0 always */
}

static inline void encode_openhdr(struct xdr_stream *xdr, const struct nfs_openargs *arg)
{
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	__be32 *p;
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 /*
 * opcode 4, seqid 4, share_access 4, share_deny 4, clientid 8, ownerlen 4,
 * owner 4 = 32
 */
	RESERVE_SPACE(8);
	WRITE32(OP_OPEN);
976
	WRITE32(arg->seqid->sequence->counter);
977
	encode_share_access(xdr, arg->fmode);
978
	RESERVE_SPACE(28);
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	WRITE64(arg->clientid);
980 981 982
	WRITE32(16);
	WRITEMEM("open id:", 8);
	WRITE64(arg->id);
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}

static inline void encode_createmode(struct xdr_stream *xdr, const struct nfs_openargs *arg)
{
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	__be32 *p;
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	RESERVE_SPACE(4);
	switch(arg->open_flags & O_EXCL) {
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	case 0:
		WRITE32(NFS4_CREATE_UNCHECKED);
		encode_attrs(xdr, arg->u.attrs, arg->server);
		break;
	default:
		WRITE32(NFS4_CREATE_EXCLUSIVE);
		encode_nfs4_verifier(xdr, &arg->u.verifier);
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	}
}

static void encode_opentype(struct xdr_stream *xdr, const struct nfs_openargs *arg)
{
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	__be32 *p;
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	RESERVE_SPACE(4);
	switch (arg->open_flags & O_CREAT) {
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	case 0:
		WRITE32(NFS4_OPEN_NOCREATE);
		break;
	default:
		BUG_ON(arg->claim != NFS4_OPEN_CLAIM_NULL);
		WRITE32(NFS4_OPEN_CREATE);
		encode_createmode(xdr, arg);
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	}
}

1017
static inline void encode_delegation_type(struct xdr_stream *xdr, fmode_t delegation_type)
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{
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	__be32 *p;
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	RESERVE_SPACE(4);
	switch (delegation_type) {
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	case 0:
		WRITE32(NFS4_OPEN_DELEGATE_NONE);
		break;
	case FMODE_READ:
		WRITE32(NFS4_OPEN_DELEGATE_READ);
		break;
	case FMODE_WRITE|FMODE_READ:
		WRITE32(NFS4_OPEN_DELEGATE_WRITE);
		break;
	default:
		BUG();
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	}
}

static inline void encode_claim_null(struct xdr_stream *xdr, const struct qstr *name)
{
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	__be32 *p;
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	RESERVE_SPACE(4);
	WRITE32(NFS4_OPEN_CLAIM_NULL);
	encode_string(xdr, name->len, name->name);
}

1046
static inline void encode_claim_previous(struct xdr_stream *xdr, fmode_t type)
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{
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	__be32 *p;
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	RESERVE_SPACE(4);
	WRITE32(NFS4_OPEN_CLAIM_PREVIOUS);
	encode_delegation_type(xdr, type);
}

static inline void encode_claim_delegate_cur(struct xdr_stream *xdr, const struct qstr *name, const nfs4_stateid *stateid)
{
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	__be32 *p;
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1059
	RESERVE_SPACE(4+NFS4_STATEID_SIZE);
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	WRITE32(NFS4_OPEN_CLAIM_DELEGATE_CUR);
1061
	WRITEMEM(stateid->data, NFS4_STATEID_SIZE);
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	encode_string(xdr, name->len, name->name);
}

1065
static void encode_open(struct xdr_stream *xdr, const struct nfs_openargs *arg, struct compound_hdr *hdr)
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{
	encode_openhdr(xdr, arg);
	encode_opentype(xdr, arg);
	switch (arg->claim) {
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	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;
	default:
		BUG();
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	}
1082
	hdr->nops++;
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}

1085
static void encode_open_confirm(struct xdr_stream *xdr, const struct nfs_open_confirmargs *arg, struct compound_hdr *hdr)
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{
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	__be32 *p;
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1089
	RESERVE_SPACE(4+NFS4_STATEID_SIZE+4);
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	WRITE32(OP_OPEN_CONFIRM);
1091
	WRITEMEM(arg->stateid->data, NFS4_STATEID_SIZE);
1092
	WRITE32(arg->seqid->sequence->counter);
1093
	hdr->nops++;
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}

1096
static void encode_open_downgrade(struct xdr_stream *xdr, const struct nfs_closeargs *arg, struct compound_hdr *hdr)
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{
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	__be32 *p;
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1100
	RESERVE_SPACE(4+NFS4_STATEID_SIZE+4);
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	WRITE32(OP_OPEN_DOWNGRADE);
1102
	WRITEMEM(arg->stateid->data, NFS4_STATEID_SIZE);
1103
	WRITE32(arg->seqid->sequence->counter);
1104
	encode_share_access(xdr, arg->fmode);
1105
	hdr->nops++;
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}

1108
static void
1109
encode_putfh(struct xdr_stream *xdr, const struct nfs_fh *fh, struct compound_hdr *hdr)
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{
	int len = fh->size;
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	__be32 *p;
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	RESERVE_SPACE(8 + len);
	WRITE32(OP_PUTFH);
	WRITE32(len);
	WRITEMEM(fh->data, len);
1118
	hdr->nops++;
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}

1121
static void encode_putrootfh(struct xdr_stream *xdr, struct compound_hdr *hdr)
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{
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	__be32 *p;
1124

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	RESERVE_SPACE(4);
	WRITE32(OP_PUTROOTFH);
1127
	hdr->nops++;
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}

static void encode_stateid(struct xdr_stream *xdr, const struct nfs_open_context *ctx)
{
	nfs4_stateid stateid;
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	__be32 *p;
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1135
	RESERVE_SPACE(NFS4_STATEID_SIZE);
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	if (ctx->state != NULL) {
		nfs4_copy_stateid(&stateid, ctx->state, ctx->lockowner);
1138
		WRITEMEM(stateid.data, NFS4_STATEID_SIZE);
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	} else
1140
		WRITEMEM(zero_stateid.data, NFS4_STATEID_SIZE);
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}

1143
static void encode_read(struct xdr_stream *xdr, const struct nfs_readargs *args, struct compound_hdr *hdr)
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{
A
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	__be32 *p;
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1146 1147 1148 1149 1150 1151 1152 1153 1154

	RESERVE_SPACE(4);
	WRITE32(OP_READ);

	encode_stateid(xdr, args->context);

	RESERVE_SPACE(12);
	WRITE64(args->offset);
	WRITE32(args->count);
1155
	hdr->nops++;
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}

1158
static void encode_readdir(struct xdr_stream *xdr, const struct nfs4_readdir_arg *readdir, struct rpc_rqst *req, struct compound_hdr *hdr)
L
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{
1160 1161 1162 1163
	uint32_t attrs[2] = {
		FATTR4_WORD0_RDATTR_ERROR|FATTR4_WORD0_FILEID,
		FATTR4_WORD1_MOUNTED_ON_FILEID,
	};
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	__be32 *p;
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1166
	RESERVE_SPACE(12+NFS4_VERIFIER_SIZE+20);
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	WRITE32(OP_READDIR);
	WRITE64(readdir->cookie);
1169
	WRITEMEM(readdir->verifier.data, NFS4_VERIFIER_SIZE);
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	WRITE32(readdir->count >> 1);  /* We're not doing readdirplus */
	WRITE32(readdir->count);
	WRITE32(2);
1173 1174 1175 1176 1177 1178 1179
	/* Switch to mounted_on_fileid if the server supports it */
	if (readdir->bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)
		attrs[0] &= ~FATTR4_WORD0_FILEID;
	else
		attrs[1] &= ~FATTR4_WORD1_MOUNTED_ON_FILEID;
	WRITE32(attrs[0] & readdir->bitmask[0]);
	WRITE32(attrs[1] & readdir->bitmask[1]);
1180
	hdr->nops++;
1181 1182
	dprintk("%s: cookie = %Lu, verifier = %08x:%08x, bitmap = %08x:%08x\n",
			__func__,
1183 1184 1185 1186 1187
			(unsigned long long)readdir->cookie,
			((u32 *)readdir->verifier.data)[0],
			((u32 *)readdir->verifier.data)[1],
			attrs[0] & readdir->bitmask[0],
			attrs[1] & readdir->bitmask[1]);
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}

1190
static void encode_readlink(struct xdr_stream *xdr, const struct nfs4_readlink *readlink, struct rpc_rqst *req, struct compound_hdr *hdr)
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{
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	__be32 *p;
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	RESERVE_SPACE(4);
	WRITE32(OP_READLINK);
1196
	hdr->nops++;
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}

1199
static void encode_remove(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
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{
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	__be32 *p;
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	RESERVE_SPACE(8 + name->len);
	WRITE32(OP_REMOVE);
	WRITE32(name->len);
	WRITEMEM(name->name, name->len);
1207
	hdr->nops++;
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}

1210
static void encode_rename(struct xdr_stream *xdr, const struct qstr *oldname, const struct qstr *newname, struct compound_hdr *hdr)
L
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{
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	__be32 *p;
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	RESERVE_SPACE(8 + oldname->len);
	WRITE32(OP_RENAME);
	WRITE32(oldname->len);
	WRITEMEM(oldname->name, oldname->len);
1218

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	RESERVE_SPACE(4 + newname->len);
	WRITE32(newname->len);
	WRITEMEM(newname->name, newname->len);
1222
	hdr->nops++;
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}

1225
static void encode_renew(struct xdr_stream *xdr, const struct nfs_client *client_stateid, struct compound_hdr *hdr)
L
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{
A
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	__be32 *p;
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	RESERVE_SPACE(12);
	WRITE32(OP_RENEW);
	WRITE64(client_stateid->cl_clientid);
1232
	hdr->nops++;
L
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}

1235
static void
1236
encode_restorefh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1237
{
A
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	__be32 *p;
1239 1240 1241

	RESERVE_SPACE(4);
	WRITE32(OP_RESTOREFH);
1242
	hdr->nops++;
1243 1244
}

1245
static int
1246
encode_setacl(struct xdr_stream *xdr, struct nfs_setaclargs *arg, struct compound_hdr *hdr)
1247
{
A
Al Viro 已提交
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	__be32 *p;
1249

1250
	RESERVE_SPACE(4+NFS4_STATEID_SIZE);
1251
	WRITE32(OP_SETATTR);
1252
	WRITEMEM(zero_stateid.data, NFS4_STATEID_SIZE);
1253 1254 1255 1256 1257 1258 1259 1260
	RESERVE_SPACE(2*4);
	WRITE32(1);
	WRITE32(FATTR4_WORD0_ACL);
	if (arg->acl_len % 4)
		return -EINVAL;
	RESERVE_SPACE(4);
	WRITE32(arg->acl_len);
	xdr_write_pages(xdr, arg->acl_pages, arg->acl_pgbase, arg->acl_len);
1261
	hdr->nops++;
1262 1263 1264
	return 0;
}

1265
static void
1266
encode_savefh(struct xdr_stream *xdr, struct compound_hdr *hdr)
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{
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	__be32 *p;
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	RESERVE_SPACE(4);
	WRITE32(OP_SAVEFH);
1272
	hdr->nops++;
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}

1275
static void encode_setattr(struct xdr_stream *xdr, const struct nfs_setattrargs *arg, const struct nfs_server *server, struct compound_hdr *hdr)
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{
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	__be32 *p;
1278

A
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	RESERVE_SPACE(4+NFS4_STATEID_SIZE);
	WRITE32(OP_SETATTR);
1281
	WRITEMEM(arg->stateid.data, NFS4_STATEID_SIZE);
1282
	hdr->nops++;
1283
	encode_attrs(xdr, arg->iap, server);
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}

1286
static void encode_setclientid(struct xdr_stream *xdr, const struct nfs4_setclientid *setclientid, struct compound_hdr *hdr)
L
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{
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	__be32 *p;
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1290
	RESERVE_SPACE(4 + NFS4_VERIFIER_SIZE);
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	WRITE32(OP_SETCLIENTID);
1292
	WRITEMEM(setclientid->sc_verifier->data, NFS4_VERIFIER_SIZE);
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	encode_string(xdr, setclientid->sc_name_len, setclientid->sc_name);
	RESERVE_SPACE(4);
	WRITE32(setclientid->sc_prog);
	encode_string(xdr, setclientid->sc_netid_len, setclientid->sc_netid);
	encode_string(xdr, setclientid->sc_uaddr_len, setclientid->sc_uaddr);
	RESERVE_SPACE(4);
	WRITE32(setclientid->sc_cb_ident);
1301
	hdr->nops++;
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}

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static void encode_setclientid_confirm(struct xdr_stream *xdr, const struct nfs_client *client_state, struct compound_hdr *hdr)
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{
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	__be32 *p;
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	RESERVE_SPACE(12 + NFS4_VERIFIER_SIZE);
	WRITE32(OP_SETCLIENTID_CONFIRM);
	WRITE64(client_state->cl_clientid);
	WRITEMEM(client_state->cl_confirm.data, NFS4_VERIFIER_SIZE);
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	hdr->nops++;
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}

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static void encode_write(struct xdr_stream *xdr, const struct nfs_writeargs *args, struct compound_hdr *hdr)
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{
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	__be32 *p;
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	RESERVE_SPACE(4);
	WRITE32(OP_WRITE);

	encode_stateid(xdr, args->context);

	RESERVE_SPACE(16);
	WRITE64(args->offset);
	WRITE32(args->stable);
	WRITE32(args->count);

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

1333
static void encode_delegreturn(struct xdr_stream *xdr, const nfs4_stateid *stateid, struct compound_hdr *hdr)
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{
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	__be32 *p;
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	RESERVE_SPACE(4+NFS4_STATEID_SIZE);
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	WRITE32(OP_DELEGRETURN);
1340
	WRITEMEM(stateid->data, NFS4_STATEID_SIZE);
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	hdr->nops++;
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}
/*
 * END OF "GENERIC" ENCODE ROUTINES.
 */

/*
 * Encode an ACCESS request
 */
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static int nfs4_xdr_enc_access(struct rpc_rqst *req, __be32 *p, const struct nfs4_accessargs *args)
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{
	struct xdr_stream xdr;
	struct compound_hdr hdr = {
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		.nops = 0,
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	};

	xdr_init_encode(&xdr, &req->rq_snd_buf, p);
	encode_compound_hdr(&xdr, &hdr);
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	encode_putfh(&xdr, args->fh, &hdr);
	encode_access(&xdr, args->access, &hdr);
	encode_getfattr(&xdr, args->bitmask, &hdr);
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	encode_nops(&hdr);
1363
	return 0;
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}

/*
 * Encode LOOKUP request
 */
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static int nfs4_xdr_enc_lookup(struct rpc_rqst *req, __be32 *p, const struct nfs4_lookup_arg *args)
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{
	struct xdr_stream xdr;
	struct compound_hdr hdr = {
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		.nops = 0,
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	};

	xdr_init_encode(&xdr, &req->rq_snd_buf, p);
	encode_compound_hdr(&xdr, &hdr);
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	encode_putfh(&xdr, args->dir_fh, &hdr);
	encode_lookup(&xdr, args->name, &hdr);
	encode_getfh(&xdr, &hdr);
	encode_getfattr(&xdr, args->bitmask, &hdr);
1382
	encode_nops(&hdr);
1383
	return 0;
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}

/*
 * Encode LOOKUP_ROOT request
 */
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static int nfs4_xdr_enc_lookup_root(struct rpc_rqst *req, __be32 *p, const struct nfs4_lookup_root_arg *args)
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{
	struct xdr_stream xdr;
	struct compound_hdr hdr = {
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		.nops = 0,
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	};

	xdr_init_encode(&xdr, &req->rq_snd_buf, p);
	encode_compound_hdr(&xdr, &hdr);
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	encode_putrootfh(&xdr, &hdr);
	encode_getfh(&xdr, &hdr);
	encode_getfattr(&xdr, args->bitmask, &hdr);
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	encode_nops(&hdr);
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	return 0;
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}

/*
 * Encode REMOVE request
 */
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static int nfs4_xdr_enc_remove(struct rpc_rqst *req, __be32 *p, const struct nfs_removeargs *args)
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{
	struct xdr_stream xdr;
	struct compound_hdr hdr = {
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		.nops = 0,
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	};

	xdr_init_encode(&xdr, &req->rq_snd_buf, p);
	encode_compound_hdr(&xdr, &hdr);
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	encode_putfh(&xdr, args->fh, &hdr);
	encode_remove(&xdr, &args->name, &hdr);
	encode_getfattr(&xdr, args->bitmask, &hdr);
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	encode_nops(&hdr);
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	return 0;
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}

/*
 * Encode RENAME request
 */
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static int nfs4_xdr_enc_rename(struct rpc_rqst *req, __be32 *p, const struct nfs4_rename_arg *args)
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{
	struct xdr_stream xdr;
	struct compound_hdr hdr = {
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		.nops = 0,
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	};

	xdr_init_encode(&xdr, &req->rq_snd_buf, p);
	encode_compound_hdr(&xdr, &hdr);
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	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);
	encode_getfattr(&xdr, args->bitmask, &hdr);
	encode_restorefh(&xdr, &hdr);
	encode_getfattr(&xdr, args->bitmask, &hdr);
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	encode_nops(&hdr);
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	return 0;
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}

/*
 * Encode LINK request
 */
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static int nfs4_xdr_enc_link(struct rpc_rqst *req, __be32 *p, const struct nfs4_link_arg *args)
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{
	struct xdr_stream xdr;
	struct compound_hdr hdr = {
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		.nops = 0,
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	};

	xdr_init_encode(&xdr, &req->rq_snd_buf, p);
	encode_compound_hdr(&xdr, &hdr);
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	encode_putfh(&xdr, args->fh, &hdr);
	encode_savefh(&xdr, &hdr);
	encode_putfh(&xdr, args->dir_fh, &hdr);
	encode_link(&xdr, args->name, &hdr);
	encode_getfattr(&xdr, args->bitmask, &hdr);
	encode_restorefh(&xdr, &hdr);
	encode_getfattr(&xdr, args->bitmask, &hdr);
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	encode_nops(&hdr);
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	return 0;
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}

/*
 * Encode CREATE request
 */
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static int nfs4_xdr_enc_create(struct rpc_rqst *req, __be32 *p, const struct nfs4_create_arg *args)
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{
	struct xdr_stream xdr;
	struct compound_hdr hdr = {
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		.nops = 0,
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	};

	xdr_init_encode(&xdr, &req->rq_snd_buf, p);
	encode_compound_hdr(&xdr, &hdr);
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	encode_putfh(&xdr, args->dir_fh, &hdr);
	encode_savefh(&xdr, &hdr);
	encode_create(&xdr, args, &hdr);
	encode_getfh(&xdr, &hdr);
	encode_getfattr(&xdr, args->bitmask, &hdr);
	encode_restorefh(&xdr, &hdr);
	encode_getfattr(&xdr, args->bitmask, &hdr);
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	encode_nops(&hdr);
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	return 0;
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}

/*
 * Encode SYMLINK request
 */
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static int nfs4_xdr_enc_symlink(struct rpc_rqst *req, __be32 *p, const struct nfs4_create_arg *args)
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{
	return nfs4_xdr_enc_create(req, p, args);
}

/*
 * Encode GETATTR request
 */
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static int nfs4_xdr_enc_getattr(struct rpc_rqst *req, __be32 *p, const struct nfs4_getattr_arg *args)
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{
	struct xdr_stream xdr;
	struct compound_hdr hdr = {
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		.nops = 0,
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	};

	xdr_init_encode(&xdr, &req->rq_snd_buf, p);
	encode_compound_hdr(&xdr, &hdr);
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	encode_putfh(&xdr, args->fh, &hdr);
	encode_getfattr(&xdr, args->bitmask, &hdr);
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	encode_nops(&hdr);
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	return 0;
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}

/*
 * Encode a CLOSE request
 */
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static int nfs4_xdr_enc_close(struct rpc_rqst *req, __be32 *p, struct nfs_closeargs *args)
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{
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	struct xdr_stream xdr;
	struct compound_hdr hdr = {
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		.nops   = 0,
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	};

	xdr_init_encode(&xdr, &req->rq_snd_buf, p);
	encode_compound_hdr(&xdr, &hdr);
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	encode_putfh(&xdr, args->fh, &hdr);
	encode_close(&xdr, args, &hdr);
	encode_getfattr(&xdr, args->bitmask, &hdr);
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	encode_nops(&hdr);
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	return 0;
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}

/*
 * Encode an OPEN request
 */
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static int nfs4_xdr_enc_open(struct rpc_rqst *req, __be32 *p, struct nfs_openargs *args)
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{
	struct xdr_stream xdr;
	struct compound_hdr hdr = {
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		.nops = 0,
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	};

	xdr_init_encode(&xdr, &req->rq_snd_buf, p);
	encode_compound_hdr(&xdr, &hdr);
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	encode_putfh(&xdr, args->fh, &hdr);
	encode_savefh(&xdr, &hdr);
	encode_open(&xdr, args, &hdr);
	encode_getfh(&xdr, &hdr);
	encode_getfattr(&xdr, args->bitmask, &hdr);
	encode_restorefh(&xdr, &hdr);
	encode_getfattr(&xdr, args->bitmask, &hdr);
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	encode_nops(&hdr);
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	return 0;
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}

/*
 * Encode an OPEN_CONFIRM request
 */
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static int nfs4_xdr_enc_open_confirm(struct rpc_rqst *req, __be32 *p, struct nfs_open_confirmargs *args)
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{
	struct xdr_stream xdr;
	struct compound_hdr hdr = {
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		.nops   = 0,
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	};

	xdr_init_encode(&xdr, &req->rq_snd_buf, p);
	encode_compound_hdr(&xdr, &hdr);
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	encode_putfh(&xdr, args->fh, &hdr);
	encode_open_confirm(&xdr, args, &hdr);
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	encode_nops(&hdr);
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	return 0;
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}

/*
 * Encode an OPEN request with no attributes.
 */
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static int nfs4_xdr_enc_open_noattr(struct rpc_rqst *req, __be32 *p, struct nfs_openargs *args)
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{
	struct xdr_stream xdr;
	struct compound_hdr hdr = {
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		.nops   = 0,
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	};

	xdr_init_encode(&xdr, &req->rq_snd_buf, p);
	encode_compound_hdr(&xdr, &hdr);
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	encode_putfh(&xdr, args->fh, &hdr);
	encode_open(&xdr, args, &hdr);
	encode_getfattr(&xdr, args->bitmask, &hdr);
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	encode_nops(&hdr);
1595
	return 0;
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}

/*
 * Encode an OPEN_DOWNGRADE request
 */
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static int nfs4_xdr_enc_open_downgrade(struct rpc_rqst *req, __be32 *p, struct nfs_closeargs *args)
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{
	struct xdr_stream xdr;
	struct compound_hdr hdr = {
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		.nops	= 0,
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	};

	xdr_init_encode(&xdr, &req->rq_snd_buf, p);
	encode_compound_hdr(&xdr, &hdr);
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	encode_putfh(&xdr, args->fh, &hdr);
	encode_open_downgrade(&xdr, args, &hdr);
	encode_getfattr(&xdr, args->bitmask, &hdr);
1613
	encode_nops(&hdr);
1614
	return 0;
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}

/*
 * Encode a LOCK request
 */
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static int nfs4_xdr_enc_lock(struct rpc_rqst *req, __be32 *p, struct nfs_lock_args *args)
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{
	struct xdr_stream xdr;
	struct compound_hdr hdr = {
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		.nops   = 0,
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	};

	xdr_init_encode(&xdr, &req->rq_snd_buf, p);
	encode_compound_hdr(&xdr, &hdr);
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	encode_putfh(&xdr, args->fh, &hdr);
	encode_lock(&xdr, args, &hdr);
1631
	encode_nops(&hdr);
1632
	return 0;
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}

/*
 * Encode a LOCKT request
 */
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static int nfs4_xdr_enc_lockt(struct rpc_rqst *req, __be32 *p, struct nfs_lockt_args *args)
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{
	struct xdr_stream xdr;
	struct compound_hdr hdr = {
1642
		.nops   = 0,
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	};

	xdr_init_encode(&xdr, &req->rq_snd_buf, p);
	encode_compound_hdr(&xdr, &hdr);
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	encode_putfh(&xdr, args->fh, &hdr);
	encode_lockt(&xdr, args, &hdr);
1649
	encode_nops(&hdr);
1650
	return 0;
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}

/*
 * Encode a LOCKU request
 */
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static int nfs4_xdr_enc_locku(struct rpc_rqst *req, __be32 *p, struct nfs_locku_args *args)
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{
	struct xdr_stream xdr;
	struct compound_hdr hdr = {
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		.nops   = 0,
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	};

	xdr_init_encode(&xdr, &req->rq_snd_buf, p);
	encode_compound_hdr(&xdr, &hdr);
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	encode_putfh(&xdr, args->fh, &hdr);
	encode_locku(&xdr, args, &hdr);
1667
	encode_nops(&hdr);
1668
	return 0;
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}

/*
 * Encode a READLINK request
 */
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static int nfs4_xdr_enc_readlink(struct rpc_rqst *req, __be32 *p, const struct nfs4_readlink *args)
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{
	struct xdr_stream xdr;
	struct compound_hdr hdr = {
1678
		.nops = 0,
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	};
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	struct rpc_auth *auth = req->rq_task->tk_msg.rpc_cred->cr_auth;
	unsigned int replen;
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	xdr_init_encode(&xdr, &req->rq_snd_buf, p);
	encode_compound_hdr(&xdr, &hdr);
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	encode_putfh(&xdr, args->fh, &hdr);
	encode_readlink(&xdr, args, req, &hdr);
1687 1688 1689 1690 1691 1692 1693 1694

	/* set up reply kvec
	 *    toplevel_status + taglen + rescount + OP_PUTFH + status
	 *      + OP_READLINK + status + string length = 8
	 */
	replen = (RPC_REPHDRSIZE + auth->au_rslack + NFS4_dec_readlink_sz) << 2;
	xdr_inline_pages(&req->rq_rcv_buf, replen, args->pages,
			args->pgbase, args->pglen);
1695
	encode_nops(&hdr);
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	return 0;
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}

/*
 * Encode a READDIR request
 */
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static int nfs4_xdr_enc_readdir(struct rpc_rqst *req, __be32 *p, const struct nfs4_readdir_arg *args)
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{
	struct xdr_stream xdr;
	struct compound_hdr hdr = {
1706
		.nops = 0,
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	};
1708 1709
	struct rpc_auth *auth = req->rq_task->tk_msg.rpc_cred->cr_auth;
	int replen;
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	xdr_init_encode(&xdr, &req->rq_snd_buf, p);
	encode_compound_hdr(&xdr, &hdr);
1713 1714
	encode_putfh(&xdr, args->fh, &hdr);
	encode_readdir(&xdr, args, req, &hdr);
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	/* set up reply kvec
	 *    toplevel_status + taglen + rescount + OP_PUTFH + status
	 *      + OP_READDIR + status + verifer(2)  = 9
	 */
	replen = (RPC_REPHDRSIZE + auth->au_rslack + NFS4_dec_readdir_sz) << 2;
	xdr_inline_pages(&req->rq_rcv_buf, replen, args->pages,
			 args->pgbase, args->count);
	dprintk("%s: inlined page args = (%u, %p, %u, %u)\n",
1724
			__func__, replen, args->pages,
1725
			args->pgbase, args->count);
1726
	encode_nops(&hdr);
1727
	return 0;
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}

/*
 * Encode a READ request
 */
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static int nfs4_xdr_enc_read(struct rpc_rqst *req, __be32 *p, struct nfs_readargs *args)
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{
1735
	struct rpc_auth *auth = req->rq_task->tk_msg.rpc_cred->cr_auth;
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	struct xdr_stream xdr;
	struct compound_hdr hdr = {
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		.nops = 0,
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	};
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	int replen;
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	xdr_init_encode(&xdr, &req->rq_snd_buf, p);
	encode_compound_hdr(&xdr, &hdr);
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	encode_putfh(&xdr, args->fh, &hdr);
	encode_read(&xdr, args, &hdr);
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	/* set up reply kvec
	 *    toplevel status + taglen=0 + rescount + OP_PUTFH + status
	 *       + OP_READ + status + eof + datalen = 9
	 */
	replen = (RPC_REPHDRSIZE + auth->au_rslack + NFS4_dec_read_sz) << 2;
	xdr_inline_pages(&req->rq_rcv_buf, replen,
			 args->pages, args->pgbase, args->count);
1754
	req->rq_rcv_buf.flags |= XDRBUF_READ;
1755
	encode_nops(&hdr);
1756
	return 0;
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}

/*
 * Encode an SETATTR request
 */
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static int nfs4_xdr_enc_setattr(struct rpc_rqst *req, __be32 *p, struct nfs_setattrargs *args)
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{
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	struct xdr_stream xdr;
	struct compound_hdr hdr = {
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		.nops   = 0,
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	};

	xdr_init_encode(&xdr, &req->rq_snd_buf, p);
	encode_compound_hdr(&xdr, &hdr);
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	encode_putfh(&xdr, args->fh, &hdr);
	encode_setattr(&xdr, args, args->server, &hdr);
	encode_getfattr(&xdr, args->bitmask, &hdr);
1774
	encode_nops(&hdr);
1775
	return 0;
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}

1778 1779 1780 1781
/*
 * Encode a GETACL request
 */
static int
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nfs4_xdr_enc_getacl(struct rpc_rqst *req, __be32 *p,
1783 1784 1785
		struct nfs_getaclargs *args)
{
	struct xdr_stream xdr;
1786
	struct rpc_auth *auth = req->rq_task->tk_msg.rpc_cred->cr_auth;
1787
	struct compound_hdr hdr = {
1788
		.nops   = 0,
1789
	};
1790
	int replen;
1791 1792 1793

	xdr_init_encode(&xdr, &req->rq_snd_buf, p);
	encode_compound_hdr(&xdr, &hdr);
1794 1795 1796
	encode_putfh(&xdr, args->fh, &hdr);
	encode_getattr_two(&xdr, FATTR4_WORD0_ACL, 0, &hdr);

1797 1798 1799 1800
	/* set up reply buffer: */
	replen = (RPC_REPHDRSIZE + auth->au_rslack + NFS4_dec_getacl_sz) << 2;
	xdr_inline_pages(&req->rq_rcv_buf, replen,
		args->acl_pages, args->acl_pgbase, args->acl_len);
1801
	encode_nops(&hdr);
1802
	return 0;
1803 1804
}

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/*
 * Encode a WRITE request
 */
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static int nfs4_xdr_enc_write(struct rpc_rqst *req, __be32 *p, struct nfs_writeargs *args)
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{
	struct xdr_stream xdr;
	struct compound_hdr hdr = {
1812
		.nops = 0,
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	};

	xdr_init_encode(&xdr, &req->rq_snd_buf, p);
	encode_compound_hdr(&xdr, &hdr);
1817 1818
	encode_putfh(&xdr, args->fh, &hdr);
	encode_write(&xdr, args, &hdr);
1819
	req->rq_snd_buf.flags |= XDRBUF_WRITE;
1820
	encode_getfattr(&xdr, args->bitmask, &hdr);
1821
	encode_nops(&hdr);
1822
	return 0;
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}

/*
 *  a COMMIT request
 */
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static int nfs4_xdr_enc_commit(struct rpc_rqst *req, __be32 *p, struct nfs_writeargs *args)
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{
	struct xdr_stream xdr;
	struct compound_hdr hdr = {
1832
		.nops = 0,
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	};

	xdr_init_encode(&xdr, &req->rq_snd_buf, p);
	encode_compound_hdr(&xdr, &hdr);
1837 1838 1839
	encode_putfh(&xdr, args->fh, &hdr);
	encode_commit(&xdr, args, &hdr);
	encode_getfattr(&xdr, args->bitmask, &hdr);
1840
	encode_nops(&hdr);
1841
	return 0;
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}

/*
 * FSINFO request
 */
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static int nfs4_xdr_enc_fsinfo(struct rpc_rqst *req, __be32 *p, struct nfs4_fsinfo_arg *args)
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{
	struct xdr_stream xdr;
	struct compound_hdr hdr = {
1851
		.nops	= 0,
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	};

	xdr_init_encode(&xdr, &req->rq_snd_buf, p);
	encode_compound_hdr(&xdr, &hdr);
1856 1857
	encode_putfh(&xdr, args->fh, &hdr);
	encode_fsinfo(&xdr, args->bitmask, &hdr);
1858
	encode_nops(&hdr);
1859
	return 0;
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}

/*
 * a PATHCONF request
 */
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static int nfs4_xdr_enc_pathconf(struct rpc_rqst *req, __be32 *p, const struct nfs4_pathconf_arg *args)
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{
	struct xdr_stream xdr;
	struct compound_hdr hdr = {
1869
		.nops = 0,
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	};

	xdr_init_encode(&xdr, &req->rq_snd_buf, p);
	encode_compound_hdr(&xdr, &hdr);
1874 1875 1876
	encode_putfh(&xdr, args->fh, &hdr);
	encode_getattr_one(&xdr, args->bitmask[0] & nfs4_pathconf_bitmap[0],
			   &hdr);
1877
	encode_nops(&hdr);
1878
	return 0;
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}

/*
 * a STATFS request
 */
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static int nfs4_xdr_enc_statfs(struct rpc_rqst *req, __be32 *p, const struct nfs4_statfs_arg *args)
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{
	struct xdr_stream xdr;
	struct compound_hdr hdr = {
1888
		.nops = 0,
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	};

	xdr_init_encode(&xdr, &req->rq_snd_buf, p);
	encode_compound_hdr(&xdr, &hdr);
1893 1894 1895
	encode_putfh(&xdr, args->fh, &hdr);
	encode_getattr_two(&xdr, args->bitmask[0] & nfs4_statfs_bitmap[0],
			   args->bitmask[1] & nfs4_statfs_bitmap[1], &hdr);
1896
	encode_nops(&hdr);
1897
	return 0;
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}

/*
 * GETATTR_BITMAP request
 */
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static int nfs4_xdr_enc_server_caps(struct rpc_rqst *req, __be32 *p, const struct nfs_fh *fhandle)
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{
	struct xdr_stream xdr;
	struct compound_hdr hdr = {
1907
		.nops = 0,
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	};

	xdr_init_encode(&xdr, &req->rq_snd_buf, p);
	encode_compound_hdr(&xdr, &hdr);
1912 1913 1914 1915 1916
	encode_putfh(&xdr, fhandle, &hdr);
	encode_getattr_one(&xdr, FATTR4_WORD0_SUPPORTED_ATTRS|
			   FATTR4_WORD0_LINK_SUPPORT|
			   FATTR4_WORD0_SYMLINK_SUPPORT|
			   FATTR4_WORD0_ACLSUPPORT, &hdr);
1917
	encode_nops(&hdr);
1918
	return 0;
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}

/*
 * a RENEW request
 */
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static int nfs4_xdr_enc_renew(struct rpc_rqst *req, __be32 *p, struct nfs_client *clp)
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{
	struct xdr_stream xdr;
	struct compound_hdr hdr = {
1928
		.nops	= 0,
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	};

	xdr_init_encode(&xdr, &req->rq_snd_buf, p);
	encode_compound_hdr(&xdr, &hdr);
1933
	encode_renew(&xdr, clp, &hdr);
1934
	encode_nops(&hdr);
1935
	return 0;
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}

/*
 * a SETCLIENTID request
 */
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static int nfs4_xdr_enc_setclientid(struct rpc_rqst *req, __be32 *p, struct nfs4_setclientid *sc)
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{
	struct xdr_stream xdr;
	struct compound_hdr hdr = {
1945
		.nops	= 0,
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	};

	xdr_init_encode(&xdr, &req->rq_snd_buf, p);
	encode_compound_hdr(&xdr, &hdr);
1950
	encode_setclientid(&xdr, sc, &hdr);
1951
	encode_nops(&hdr);
1952
	return 0;
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}

/*
 * a SETCLIENTID_CONFIRM request
 */
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static int nfs4_xdr_enc_setclientid_confirm(struct rpc_rqst *req, __be32 *p, struct nfs_client *clp)
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{
	struct xdr_stream xdr;
	struct compound_hdr hdr = {
1962
		.nops	= 0,
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	};
	const u32 lease_bitmap[2] = { FATTR4_WORD0_LEASE_TIME, 0 };

	xdr_init_encode(&xdr, &req->rq_snd_buf, p);
	encode_compound_hdr(&xdr, &hdr);
1968 1969 1970
	encode_setclientid_confirm(&xdr, clp, &hdr);
	encode_putrootfh(&xdr, &hdr);
	encode_fsinfo(&xdr, lease_bitmap, &hdr);
1971
	encode_nops(&hdr);
1972
	return 0;
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}

/*
 * DELEGRETURN request
 */
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static int nfs4_xdr_enc_delegreturn(struct rpc_rqst *req, __be32 *p, const struct nfs4_delegreturnargs *args)
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{
	struct xdr_stream xdr;
	struct compound_hdr hdr = {
1982
		.nops = 0,
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	};

	xdr_init_encode(&xdr, &req->rq_snd_buf, p);
	encode_compound_hdr(&xdr, &hdr);
1987 1988 1989
	encode_putfh(&xdr, args->fhandle, &hdr);
	encode_delegreturn(&xdr, args->stateid, &hdr);
	encode_getfattr(&xdr, args->bitmask, &hdr);
1990
	encode_nops(&hdr);
1991
	return 0;
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}

1994 1995 1996
/*
 * Encode FS_LOCATIONS request
 */
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static int nfs4_xdr_enc_fs_locations(struct rpc_rqst *req, __be32 *p, struct nfs4_fs_locations_arg *args)
1998 1999 2000
{
	struct xdr_stream xdr;
	struct compound_hdr hdr = {
2001
		.nops = 0,
2002
	};
2003
	struct rpc_auth *auth = req->rq_task->tk_msg.rpc_cred->cr_auth;
2004 2005 2006 2007
	int replen;

	xdr_init_encode(&xdr, &req->rq_snd_buf, p);
	encode_compound_hdr(&xdr, &hdr);
2008 2009 2010 2011
	encode_putfh(&xdr, args->dir_fh, &hdr);
	encode_lookup(&xdr, args->name, &hdr);
	encode_fs_locations(&xdr, args->bitmask, &hdr);

2012
	/* set up reply
2013
	 *   toplevel_status + OP_PUTFH + status
2014 2015 2016 2017 2018
	 *   + OP_LOOKUP + status + OP_GETATTR + status = 7
	 */
	replen = (RPC_REPHDRSIZE + auth->au_rslack + 7) << 2;
	xdr_inline_pages(&req->rq_rcv_buf, replen, &args->page,
			0, PAGE_SIZE);
2019
	encode_nops(&hdr);
2020
	return 0;
2021 2022
}

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/*
 * START OF "GENERIC" DECODE ROUTINES.
 *   These may look a little ugly since they are imported from a "generic"
 * set of XDR encode/decode routines which are intended to be shared by
 * all of our NFSv4 implementations (OpenBSD, MacOS X...).
 *
 * If the pain of reading these is too great, it should be a straightforward
 * task to translate them into Linux-specific versions which are more
 * consistent with the style used in NFSv2/v3...
 */
#define READ32(x)         (x) = ntohl(*p++)
#define READ64(x)         do {			\
	(x) = (u64)ntohl(*p++) << 32;		\
	(x) |= ntohl(*p++);			\
} while (0)
#define READTIME(x)       do {			\
	p++;					\
	(x.tv_sec) = ntohl(*p++);		\
	(x.tv_nsec) = ntohl(*p++);		\
} while (0)
#define COPYMEM(x,nbytes) do {			\
	memcpy((x), p, nbytes);			\
	p += XDR_QUADLEN(nbytes);		\
} while (0)

#define READ_BUF(nbytes)  do { \
	p = xdr_inline_decode(xdr, nbytes); \
2050
	if (unlikely(!p)) { \
2051
		dprintk("nfs: %s: prematurely hit end of receive" \
2052
				" buffer\n", __func__); \
2053
		dprintk("nfs: %s: xdr->p=%p, bytes=%u, xdr->end=%p\n", \
2054
				__func__, xdr->p, nbytes, xdr->end); \
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		return -EIO; \
	} \
} while (0)

2059
static int decode_opaque_inline(struct xdr_stream *xdr, unsigned int *len, char **string)
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{
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	__be32 *p;
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	READ_BUF(4);
	READ32(*len);
	READ_BUF(*len);
	*string = (char *)p;
	return 0;
}

static int decode_compound_hdr(struct xdr_stream *xdr, struct compound_hdr *hdr)
{
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	__be32 *p;
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	READ_BUF(8);
	READ32(hdr->status);
	READ32(hdr->taglen);
2077

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	READ_BUF(hdr->taglen + 4);
	hdr->tag = (char *)p;
	p += XDR_QUADLEN(hdr->taglen);
	READ32(hdr->nops);
2082 2083
	if (unlikely(hdr->nops < 1))
		return nfs4_stat_to_errno(hdr->status);
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	return 0;
}

static int decode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 expected)
{
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	__be32 *p;
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	uint32_t opnum;
	int32_t nfserr;

	READ_BUF(8);
	READ32(opnum);
	if (opnum != expected) {
2096 2097
		dprintk("nfs: Server returned operation"
			" %d but we issued a request for %d\n",
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				opnum, expected);
		return -EIO;
	}
	READ32(nfserr);
	if (nfserr != NFS_OK)
2103
		return nfs4_stat_to_errno(nfserr);
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	return 0;
}

/* Dummy routine */
2108
static int decode_ace(struct xdr_stream *xdr, void *ace, struct nfs_client *clp)
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{
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	__be32 *p;
2111
	unsigned int strlen;
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	char *str;

	READ_BUF(12);
	return decode_opaque_inline(xdr, &strlen, &str);
}

static int decode_attr_bitmap(struct xdr_stream *xdr, uint32_t *bitmap)
{
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	uint32_t bmlen;
	__be32 *p;
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	READ_BUF(4);
	READ32(bmlen);

	bitmap[0] = bitmap[1] = 0;
	READ_BUF((bmlen << 2));
	if (bmlen > 0) {
		READ32(bitmap[0]);
		if (bmlen > 1)
			READ32(bitmap[1]);
	}
	return 0;
}

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static inline int decode_attr_length(struct xdr_stream *xdr, uint32_t *attrlen, __be32 **savep)
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{
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	__be32 *p;
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	READ_BUF(4);
	READ32(*attrlen);
	*savep = xdr->p;
	return 0;
}

static int decode_attr_supported(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *bitmask)
{
	if (likely(bitmap[0] & FATTR4_WORD0_SUPPORTED_ATTRS)) {
		decode_attr_bitmap(xdr, bitmask);
		bitmap[0] &= ~FATTR4_WORD0_SUPPORTED_ATTRS;
	} else
		bitmask[0] = bitmask[1] = 0;
2153
	dprintk("%s: bitmask=%08x:%08x\n", __func__, bitmask[0], bitmask[1]);
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	return 0;
}

static int decode_attr_type(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *type)
{
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	__be32 *p;
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	*type = 0;
	if (unlikely(bitmap[0] & (FATTR4_WORD0_TYPE - 1U)))
		return -EIO;
	if (likely(bitmap[0] & FATTR4_WORD0_TYPE)) {
		READ_BUF(4);
		READ32(*type);
		if (*type < NF4REG || *type > NF4NAMEDATTR) {
2168
			dprintk("%s: bad type %d\n", __func__, *type);
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			return -EIO;
		}
		bitmap[0] &= ~FATTR4_WORD0_TYPE;
	}
2173
	dprintk("%s: type=0%o\n", __func__, nfs_type2fmt[*type]);
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	return 0;
}

static int decode_attr_change(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *change)
{
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	__be32 *p;
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	*change = 0;
	if (unlikely(bitmap[0] & (FATTR4_WORD0_CHANGE - 1U)))
		return -EIO;
	if (likely(bitmap[0] & FATTR4_WORD0_CHANGE)) {
		READ_BUF(8);
		READ64(*change);
		bitmap[0] &= ~FATTR4_WORD0_CHANGE;
	}
2189
	dprintk("%s: change attribute=%Lu\n", __func__,
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			(unsigned long long)*change);
	return 0;
}

static int decode_attr_size(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *size)
{
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	__be32 *p;
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	*size = 0;
	if (unlikely(bitmap[0] & (FATTR4_WORD0_SIZE - 1U)))
		return -EIO;
	if (likely(bitmap[0] & FATTR4_WORD0_SIZE)) {
		READ_BUF(8);
		READ64(*size);
		bitmap[0] &= ~FATTR4_WORD0_SIZE;
	}
2206
	dprintk("%s: file size=%Lu\n", __func__, (unsigned long long)*size);
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	return 0;
}

static int decode_attr_link_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
{
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	__be32 *p;
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	*res = 0;
	if (unlikely(bitmap[0] & (FATTR4_WORD0_LINK_SUPPORT - 1U)))
		return -EIO;
	if (likely(bitmap[0] & FATTR4_WORD0_LINK_SUPPORT)) {
		READ_BUF(4);
		READ32(*res);
		bitmap[0] &= ~FATTR4_WORD0_LINK_SUPPORT;
	}
2222
	dprintk("%s: link support=%s\n", __func__, *res == 0 ? "false" : "true");
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	return 0;
}

static int decode_attr_symlink_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
{
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	__be32 *p;
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	*res = 0;
	if (unlikely(bitmap[0] & (FATTR4_WORD0_SYMLINK_SUPPORT - 1U)))
		return -EIO;
	if (likely(bitmap[0] & FATTR4_WORD0_SYMLINK_SUPPORT)) {
		READ_BUF(4);
		READ32(*res);
		bitmap[0] &= ~FATTR4_WORD0_SYMLINK_SUPPORT;
	}
2238
	dprintk("%s: symlink support=%s\n", __func__, *res == 0 ? "false" : "true");
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	return 0;
}

2242
static int decode_attr_fsid(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_fsid *fsid)
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{
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	__be32 *p;
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	fsid->major = 0;
	fsid->minor = 0;
	if (unlikely(bitmap[0] & (FATTR4_WORD0_FSID - 1U)))
		return -EIO;
	if (likely(bitmap[0] & FATTR4_WORD0_FSID)) {
		READ_BUF(16);
		READ64(fsid->major);
		READ64(fsid->minor);
		bitmap[0] &= ~FATTR4_WORD0_FSID;
	}
2256
	dprintk("%s: fsid=(0x%Lx/0x%Lx)\n", __func__,
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			(unsigned long long)fsid->major,
			(unsigned long long)fsid->minor);
	return 0;
}

static int decode_attr_lease_time(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
{
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	__be32 *p;
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	*res = 60;
	if (unlikely(bitmap[0] & (FATTR4_WORD0_LEASE_TIME - 1U)))
		return -EIO;
	if (likely(bitmap[0] & FATTR4_WORD0_LEASE_TIME)) {
		READ_BUF(4);
		READ32(*res);
		bitmap[0] &= ~FATTR4_WORD0_LEASE_TIME;
	}
2274
	dprintk("%s: file size=%u\n", __func__, (unsigned int)*res);
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2275 2276 2277 2278 2279
	return 0;
}

static int decode_attr_aclsupport(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
{
A
Al Viro 已提交
2280
	__be32 *p;
L
Linus Torvalds 已提交
2281 2282 2283 2284 2285 2286 2287 2288 2289

	*res = ACL4_SUPPORT_ALLOW_ACL|ACL4_SUPPORT_DENY_ACL;
	if (unlikely(bitmap[0] & (FATTR4_WORD0_ACLSUPPORT - 1U)))
		return -EIO;
	if (likely(bitmap[0] & FATTR4_WORD0_ACLSUPPORT)) {
		READ_BUF(4);
		READ32(*res);
		bitmap[0] &= ~FATTR4_WORD0_ACLSUPPORT;
	}
2290
	dprintk("%s: ACLs supported=%u\n", __func__, (unsigned int)*res);
L
Linus Torvalds 已提交
2291 2292 2293 2294 2295
	return 0;
}

static int decode_attr_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
{
A
Al Viro 已提交
2296
	__be32 *p;
L
Linus Torvalds 已提交
2297 2298 2299 2300 2301 2302 2303 2304 2305

	*fileid = 0;
	if (unlikely(bitmap[0] & (FATTR4_WORD0_FILEID - 1U)))
		return -EIO;
	if (likely(bitmap[0] & FATTR4_WORD0_FILEID)) {
		READ_BUF(8);
		READ64(*fileid);
		bitmap[0] &= ~FATTR4_WORD0_FILEID;
	}
2306
	dprintk("%s: fileid=%Lu\n", __func__, (unsigned long long)*fileid);
L
Linus Torvalds 已提交
2307 2308 2309
	return 0;
}

2310 2311
static int decode_attr_mounted_on_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
{
A
Al Viro 已提交
2312
	__be32 *p;
2313 2314 2315 2316 2317 2318 2319 2320 2321

	*fileid = 0;
	if (unlikely(bitmap[1] & (FATTR4_WORD1_MOUNTED_ON_FILEID - 1U)))
		return -EIO;
	if (likely(bitmap[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)) {
		READ_BUF(8);
		READ64(*fileid);
		bitmap[1] &= ~FATTR4_WORD1_MOUNTED_ON_FILEID;
	}
2322
	dprintk("%s: fileid=%Lu\n", __func__, (unsigned long long)*fileid);
2323 2324 2325
	return 0;
}

L
Linus Torvalds 已提交
2326 2327
static int decode_attr_files_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
{
A
Al Viro 已提交
2328
	__be32 *p;
L
Linus Torvalds 已提交
2329 2330 2331 2332 2333 2334 2335 2336 2337 2338
	int status = 0;

	*res = 0;
	if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_AVAIL - 1U)))
		return -EIO;
	if (likely(bitmap[0] & FATTR4_WORD0_FILES_AVAIL)) {
		READ_BUF(8);
		READ64(*res);
		bitmap[0] &= ~FATTR4_WORD0_FILES_AVAIL;
	}
2339
	dprintk("%s: files avail=%Lu\n", __func__, (unsigned long long)*res);
L
Linus Torvalds 已提交
2340 2341 2342 2343 2344
	return status;
}

static int decode_attr_files_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
{
A
Al Viro 已提交
2345
	__be32 *p;
L
Linus Torvalds 已提交
2346 2347 2348 2349 2350 2351 2352 2353 2354 2355
	int status = 0;

	*res = 0;
	if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_FREE - 1U)))
		return -EIO;
	if (likely(bitmap[0] & FATTR4_WORD0_FILES_FREE)) {
		READ_BUF(8);
		READ64(*res);
		bitmap[0] &= ~FATTR4_WORD0_FILES_FREE;
	}
2356
	dprintk("%s: files free=%Lu\n", __func__, (unsigned long long)*res);
L
Linus Torvalds 已提交
2357 2358 2359 2360 2361
	return status;
}

static int decode_attr_files_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
{
A
Al Viro 已提交
2362
	__be32 *p;
L
Linus Torvalds 已提交
2363 2364 2365 2366 2367 2368 2369 2370 2371 2372
	int status = 0;

	*res = 0;
	if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_TOTAL - 1U)))
		return -EIO;
	if (likely(bitmap[0] & FATTR4_WORD0_FILES_TOTAL)) {
		READ_BUF(8);
		READ64(*res);
		bitmap[0] &= ~FATTR4_WORD0_FILES_TOTAL;
	}
2373
	dprintk("%s: files total=%Lu\n", __func__, (unsigned long long)*res);
L
Linus Torvalds 已提交
2374 2375 2376
	return status;
}

2377 2378
static int decode_pathname(struct xdr_stream *xdr, struct nfs4_pathname *path)
{
2379
	u32 n;
A
Al Viro 已提交
2380
	__be32 *p;
2381 2382 2383 2384
	int status = 0;

	READ_BUF(4);
	READ32(n);
2385 2386
	if (n == 0)
		goto root_path;
2387 2388 2389 2390 2391 2392 2393 2394 2395 2396 2397 2398 2399 2400 2401 2402 2403 2404 2405 2406
	dprintk("path ");
	path->ncomponents = 0;
	while (path->ncomponents < n) {
		struct nfs4_string *component = &path->components[path->ncomponents];
		status = decode_opaque_inline(xdr, &component->len, &component->data);
		if (unlikely(status != 0))
			goto out_eio;
		if (path->ncomponents != n)
			dprintk("/");
		dprintk("%s", component->data);
		if (path->ncomponents < NFS4_PATHNAME_MAXCOMPONENTS)
			path->ncomponents++;
		else {
			dprintk("cannot parse %d components in path\n", n);
			goto out_eio;
		}
	}
out:
	dprintk("\n");
	return status;
2407 2408 2409 2410 2411 2412 2413
root_path:
/* a root pathname is sent as a zero component4 */
	path->ncomponents = 1;
	path->components[0].len=0;
	path->components[0].data=NULL;
	dprintk("path /\n");
	goto out;
2414 2415 2416 2417 2418 2419 2420
out_eio:
	dprintk(" status %d", status);
	status = -EIO;
	goto out;
}

static int decode_attr_fs_locations(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs4_fs_locations *res)
2421 2422
{
	int n;
A
Al Viro 已提交
2423
	__be32 *p;
2424 2425 2426 2427 2428 2429 2430
	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;
2431
	dprintk("%s: fsroot ", __func__);
2432
	status = decode_pathname(xdr, &res->fs_path);
2433 2434 2435 2436 2437 2438 2439 2440
	if (unlikely(status != 0))
		goto out;
	READ_BUF(4);
	READ32(n);
	if (n <= 0)
		goto out_eio;
	res->nlocations = 0;
	while (res->nlocations < n) {
2441
		u32 m;
2442
		struct nfs4_fs_location *loc = &res->locations[res->nlocations];
2443

2444 2445 2446 2447
		READ_BUF(4);
		READ32(m);

		loc->nservers = 0;
2448
		dprintk("%s: servers ", __func__);
2449 2450 2451 2452 2453 2454 2455 2456 2457
		while (loc->nservers < m) {
			struct nfs4_string *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);
			if (loc->nservers < NFS4_FS_LOCATION_MAXSERVERS)
				loc->nservers++;
			else {
2458 2459 2460
				unsigned int i;
				dprintk("%s: using first %u of %u servers "
					"returned for location %u\n",
2461
						__func__,
2462 2463
						NFS4_FS_LOCATION_MAXSERVERS,
						m, res->nlocations);
2464
				for (i = loc->nservers; i < m; i++) {
T
Trond Myklebust 已提交
2465
					unsigned int len;
2466 2467 2468 2469 2470 2471 2472 2473
					char *data;
					status = decode_opaque_inline(xdr, &len, &data);
					if (unlikely(status != 0))
						goto out_eio;
				}
			}
		}
		status = decode_pathname(xdr, &loc->rootpath);
2474 2475
		if (unlikely(status != 0))
			goto out_eio;
2476
		if (res->nlocations < NFS4_FS_LOCATIONS_MAXENTRIES)
2477 2478 2479
			res->nlocations++;
	}
out:
2480
	dprintk("%s: fs_locations done, error = %d\n", __func__, status);
2481 2482 2483 2484 2485 2486
	return status;
out_eio:
	status = -EIO;
	goto out;
}

L
Linus Torvalds 已提交
2487 2488
static int decode_attr_maxfilesize(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
{
A
Al Viro 已提交
2489
	__be32 *p;
L
Linus Torvalds 已提交
2490 2491 2492 2493 2494 2495 2496 2497 2498 2499
	int status = 0;

	*res = 0;
	if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXFILESIZE - 1U)))
		return -EIO;
	if (likely(bitmap[0] & FATTR4_WORD0_MAXFILESIZE)) {
		READ_BUF(8);
		READ64(*res);
		bitmap[0] &= ~FATTR4_WORD0_MAXFILESIZE;
	}
2500
	dprintk("%s: maxfilesize=%Lu\n", __func__, (unsigned long long)*res);
L
Linus Torvalds 已提交
2501 2502 2503 2504 2505
	return status;
}

static int decode_attr_maxlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxlink)
{
A
Al Viro 已提交
2506
	__be32 *p;
L
Linus Torvalds 已提交
2507 2508 2509 2510 2511 2512 2513 2514 2515 2516
	int status = 0;

	*maxlink = 1;
	if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXLINK - 1U)))
		return -EIO;
	if (likely(bitmap[0] & FATTR4_WORD0_MAXLINK)) {
		READ_BUF(4);
		READ32(*maxlink);
		bitmap[0] &= ~FATTR4_WORD0_MAXLINK;
	}
2517
	dprintk("%s: maxlink=%u\n", __func__, *maxlink);
L
Linus Torvalds 已提交
2518 2519 2520 2521 2522
	return status;
}

static int decode_attr_maxname(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxname)
{
A
Al Viro 已提交
2523
	__be32 *p;
L
Linus Torvalds 已提交
2524 2525 2526 2527 2528 2529 2530 2531 2532 2533
	int status = 0;

	*maxname = 1024;
	if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXNAME - 1U)))
		return -EIO;
	if (likely(bitmap[0] & FATTR4_WORD0_MAXNAME)) {
		READ_BUF(4);
		READ32(*maxname);
		bitmap[0] &= ~FATTR4_WORD0_MAXNAME;
	}
2534
	dprintk("%s: maxname=%u\n", __func__, *maxname);
L
Linus Torvalds 已提交
2535 2536 2537 2538 2539
	return status;
}

static int decode_attr_maxread(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
{
A
Al Viro 已提交
2540
	__be32 *p;
L
Linus Torvalds 已提交
2541 2542 2543 2544 2545 2546 2547 2548 2549 2550 2551 2552 2553 2554
	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;
		READ_BUF(8);
		READ64(maxread);
		if (maxread > 0x7FFFFFFF)
			maxread = 0x7FFFFFFF;
		*res = (uint32_t)maxread;
		bitmap[0] &= ~FATTR4_WORD0_MAXREAD;
	}
2555
	dprintk("%s: maxread=%lu\n", __func__, (unsigned long)*res);
L
Linus Torvalds 已提交
2556 2557 2558 2559 2560
	return status;
}

static int decode_attr_maxwrite(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
{
A
Al Viro 已提交
2561
	__be32 *p;
L
Linus Torvalds 已提交
2562 2563 2564 2565 2566 2567 2568 2569 2570 2571 2572 2573 2574 2575
	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;
		READ_BUF(8);
		READ64(maxwrite);
		if (maxwrite > 0x7FFFFFFF)
			maxwrite = 0x7FFFFFFF;
		*res = (uint32_t)maxwrite;
		bitmap[0] &= ~FATTR4_WORD0_MAXWRITE;
	}
2576
	dprintk("%s: maxwrite=%lu\n", __func__, (unsigned long)*res);
L
Linus Torvalds 已提交
2577 2578 2579
	return status;
}

2580
static int decode_attr_mode(struct xdr_stream *xdr, uint32_t *bitmap, umode_t *mode)
L
Linus Torvalds 已提交
2581
{
2582
	uint32_t tmp;
A
Al Viro 已提交
2583
	__be32 *p;
L
Linus Torvalds 已提交
2584 2585 2586 2587 2588 2589

	*mode = 0;
	if (unlikely(bitmap[1] & (FATTR4_WORD1_MODE - 1U)))
		return -EIO;
	if (likely(bitmap[1] & FATTR4_WORD1_MODE)) {
		READ_BUF(4);
2590 2591
		READ32(tmp);
		*mode = tmp & ~S_IFMT;
L
Linus Torvalds 已提交
2592 2593
		bitmap[1] &= ~FATTR4_WORD1_MODE;
	}
2594
	dprintk("%s: file mode=0%o\n", __func__, (unsigned int)*mode);
L
Linus Torvalds 已提交
2595 2596 2597 2598 2599
	return 0;
}

static int decode_attr_nlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *nlink)
{
A
Al Viro 已提交
2600
	__be32 *p;
L
Linus Torvalds 已提交
2601 2602 2603 2604 2605 2606 2607 2608 2609

	*nlink = 1;
	if (unlikely(bitmap[1] & (FATTR4_WORD1_NUMLINKS - 1U)))
		return -EIO;
	if (likely(bitmap[1] & FATTR4_WORD1_NUMLINKS)) {
		READ_BUF(4);
		READ32(*nlink);
		bitmap[1] &= ~FATTR4_WORD1_NUMLINKS;
	}
2610
	dprintk("%s: nlink=%u\n", __func__, (unsigned int)*nlink);
L
Linus Torvalds 已提交
2611 2612 2613
	return 0;
}

T
Trond Myklebust 已提交
2614
static int decode_attr_owner(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_client *clp, uint32_t *uid)
L
Linus Torvalds 已提交
2615
{
A
Al Viro 已提交
2616 2617
	uint32_t len;
	__be32 *p;
L
Linus Torvalds 已提交
2618 2619 2620 2621 2622 2623 2624 2625 2626 2627 2628

	*uid = -2;
	if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER - 1U)))
		return -EIO;
	if (likely(bitmap[1] & FATTR4_WORD1_OWNER)) {
		READ_BUF(4);
		READ32(len);
		READ_BUF(len);
		if (len < XDR_MAX_NETOBJ) {
			if (nfs_map_name_to_uid(clp, (char *)p, len, uid) != 0)
				dprintk("%s: nfs_map_name_to_uid failed!\n",
2629
						__func__);
L
Linus Torvalds 已提交
2630
		} else
2631
			dprintk("%s: name too long (%u)!\n",
2632
					__func__, len);
L
Linus Torvalds 已提交
2633 2634
		bitmap[1] &= ~FATTR4_WORD1_OWNER;
	}
2635
	dprintk("%s: uid=%d\n", __func__, (int)*uid);
L
Linus Torvalds 已提交
2636 2637 2638
	return 0;
}

T
Trond Myklebust 已提交
2639
static int decode_attr_group(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_client *clp, uint32_t *gid)
L
Linus Torvalds 已提交
2640
{
A
Al Viro 已提交
2641 2642
	uint32_t len;
	__be32 *p;
L
Linus Torvalds 已提交
2643 2644 2645 2646 2647 2648 2649 2650 2651 2652 2653

	*gid = -2;
	if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER_GROUP - 1U)))
		return -EIO;
	if (likely(bitmap[1] & FATTR4_WORD1_OWNER_GROUP)) {
		READ_BUF(4);
		READ32(len);
		READ_BUF(len);
		if (len < XDR_MAX_NETOBJ) {
			if (nfs_map_group_to_gid(clp, (char *)p, len, gid) != 0)
				dprintk("%s: nfs_map_group_to_gid failed!\n",
2654
						__func__);
L
Linus Torvalds 已提交
2655
		} else
2656
			dprintk("%s: name too long (%u)!\n",
2657
					__func__, len);
L
Linus Torvalds 已提交
2658 2659
		bitmap[1] &= ~FATTR4_WORD1_OWNER_GROUP;
	}
2660
	dprintk("%s: gid=%d\n", __func__, (int)*gid);
L
Linus Torvalds 已提交
2661 2662 2663 2664 2665
	return 0;
}

static int decode_attr_rdev(struct xdr_stream *xdr, uint32_t *bitmap, dev_t *rdev)
{
A
Al Viro 已提交
2666 2667
	uint32_t major = 0, minor = 0;
	__be32 *p;
L
Linus Torvalds 已提交
2668 2669 2670 2671 2672 2673 2674 2675 2676 2677 2678 2679 2680 2681 2682

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

		READ_BUF(8);
		READ32(major);
		READ32(minor);
		tmp = MKDEV(major, minor);
		if (MAJOR(tmp) == major && MINOR(tmp) == minor)
			*rdev = tmp;
		bitmap[1] &= ~ FATTR4_WORD1_RAWDEV;
	}
2683
	dprintk("%s: rdev=(0x%x:0x%x)\n", __func__, major, minor);
L
Linus Torvalds 已提交
2684 2685 2686 2687 2688
	return 0;
}

static int decode_attr_space_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
{
A
Al Viro 已提交
2689
	__be32 *p;
L
Linus Torvalds 已提交
2690 2691 2692 2693 2694 2695 2696 2697 2698 2699
	int status = 0;

	*res = 0;
	if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_AVAIL - 1U)))
		return -EIO;
	if (likely(bitmap[1] & FATTR4_WORD1_SPACE_AVAIL)) {
		READ_BUF(8);
		READ64(*res);
		bitmap[1] &= ~FATTR4_WORD1_SPACE_AVAIL;
	}
2700
	dprintk("%s: space avail=%Lu\n", __func__, (unsigned long long)*res);
L
Linus Torvalds 已提交
2701 2702 2703 2704 2705
	return status;
}

static int decode_attr_space_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
{
A
Al Viro 已提交
2706
	__be32 *p;
L
Linus Torvalds 已提交
2707 2708 2709 2710 2711 2712 2713 2714 2715 2716
	int status = 0;

	*res = 0;
	if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_FREE - 1U)))
		return -EIO;
	if (likely(bitmap[1] & FATTR4_WORD1_SPACE_FREE)) {
		READ_BUF(8);
		READ64(*res);
		bitmap[1] &= ~FATTR4_WORD1_SPACE_FREE;
	}
2717
	dprintk("%s: space free=%Lu\n", __func__, (unsigned long long)*res);
L
Linus Torvalds 已提交
2718 2719 2720 2721 2722
	return status;
}

static int decode_attr_space_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
{
A
Al Viro 已提交
2723
	__be32 *p;
L
Linus Torvalds 已提交
2724 2725 2726 2727 2728 2729 2730 2731 2732 2733
	int status = 0;

	*res = 0;
	if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_TOTAL - 1U)))
		return -EIO;
	if (likely(bitmap[1] & FATTR4_WORD1_SPACE_TOTAL)) {
		READ_BUF(8);
		READ64(*res);
		bitmap[1] &= ~FATTR4_WORD1_SPACE_TOTAL;
	}
2734
	dprintk("%s: space total=%Lu\n", __func__, (unsigned long long)*res);
L
Linus Torvalds 已提交
2735 2736 2737 2738 2739
	return status;
}

static int decode_attr_space_used(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *used)
{
A
Al Viro 已提交
2740
	__be32 *p;
L
Linus Torvalds 已提交
2741 2742 2743 2744 2745 2746 2747 2748 2749

	*used = 0;
	if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_USED - 1U)))
		return -EIO;
	if (likely(bitmap[1] & FATTR4_WORD1_SPACE_USED)) {
		READ_BUF(8);
		READ64(*used);
		bitmap[1] &= ~FATTR4_WORD1_SPACE_USED;
	}
2750
	dprintk("%s: space used=%Lu\n", __func__,
L
Linus Torvalds 已提交
2751 2752 2753 2754 2755 2756
			(unsigned long long)*used);
	return 0;
}

static int decode_attr_time(struct xdr_stream *xdr, struct timespec *time)
{
A
Al Viro 已提交
2757
	__be32 *p;
L
Linus Torvalds 已提交
2758 2759 2760 2761 2762 2763 2764 2765 2766 2767 2768 2769 2770 2771 2772 2773 2774 2775 2776 2777 2778 2779 2780
	uint64_t sec;
	uint32_t nsec;

	READ_BUF(12);
	READ64(sec);
	READ32(nsec);
	time->tv_sec = (time_t)sec;
	time->tv_nsec = (long)nsec;
	return 0;
}

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);
		bitmap[1] &= ~FATTR4_WORD1_TIME_ACCESS;
	}
2781
	dprintk("%s: atime=%ld\n", __func__, (long)time->tv_sec);
L
Linus Torvalds 已提交
2782 2783 2784 2785 2786 2787 2788 2789 2790 2791 2792 2793 2794 2795 2796
	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);
		bitmap[1] &= ~FATTR4_WORD1_TIME_METADATA;
	}
2797
	dprintk("%s: ctime=%ld\n", __func__, (long)time->tv_sec);
L
Linus Torvalds 已提交
2798 2799 2800 2801 2802 2803 2804 2805 2806 2807 2808 2809 2810 2811 2812
	return status;
}

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);
		bitmap[1] &= ~FATTR4_WORD1_TIME_MODIFY;
	}
2813
	dprintk("%s: mtime=%ld\n", __func__, (long)time->tv_sec);
L
Linus Torvalds 已提交
2814 2815 2816
	return status;
}

A
Al Viro 已提交
2817
static int verify_attr_len(struct xdr_stream *xdr, __be32 *savep, uint32_t attrlen)
L
Linus Torvalds 已提交
2818 2819 2820 2821 2822
{
	unsigned int attrwords = XDR_QUADLEN(attrlen);
	unsigned int nwords = xdr->p - savep;

	if (unlikely(attrwords != nwords)) {
2823 2824
		dprintk("%s: server returned incorrect attribute length: "
			"%u %c %u\n",
2825
				__func__,
L
Linus Torvalds 已提交
2826 2827 2828 2829 2830 2831 2832 2833 2834 2835
				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
2836
	__be32 *p;
L
Linus Torvalds 已提交
2837 2838 2839 2840 2841 2842 2843 2844 2845 2846

	READ_BUF(20);
	READ32(cinfo->atomic);
	READ64(cinfo->before);
	READ64(cinfo->after);
	return 0;
}

static int decode_access(struct xdr_stream *xdr, struct nfs4_accessres *access)
{
A
Al Viro 已提交
2847
	__be32 *p;
L
Linus Torvalds 已提交
2848 2849 2850 2851 2852 2853 2854 2855 2856 2857 2858 2859 2860 2861 2862 2863
	uint32_t supp, acc;
	int status;

	status = decode_op_hdr(xdr, OP_ACCESS);
	if (status)
		return status;
	READ_BUF(8);
	READ32(supp);
	READ32(acc);
	access->supported = supp;
	access->access = acc;
	return 0;
}

static int decode_close(struct xdr_stream *xdr, struct nfs_closeres *res)
{
A
Al Viro 已提交
2864
	__be32 *p;
L
Linus Torvalds 已提交
2865 2866 2867
	int status;

	status = decode_op_hdr(xdr, OP_CLOSE);
2868 2869
	if (status != -EIO)
		nfs_increment_open_seqid(status, res->seqid);
L
Linus Torvalds 已提交
2870 2871
	if (status)
		return status;
2872 2873
	READ_BUF(NFS4_STATEID_SIZE);
	COPYMEM(res->stateid.data, NFS4_STATEID_SIZE);
L
Linus Torvalds 已提交
2874 2875 2876 2877 2878
	return 0;
}

static int decode_commit(struct xdr_stream *xdr, struct nfs_writeres *res)
{
A
Al Viro 已提交
2879
	__be32 *p;
L
Linus Torvalds 已提交
2880 2881 2882 2883 2884 2885 2886 2887 2888 2889 2890 2891
	int status;

	status = decode_op_hdr(xdr, OP_COMMIT);
	if (status)
		return status;
	READ_BUF(8);
	COPYMEM(res->verf->verifier, 8);
	return 0;
}

static int decode_create(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
{
A
Al Viro 已提交
2892
	__be32 *p;
L
Linus Torvalds 已提交
2893 2894 2895 2896 2897 2898 2899 2900 2901 2902 2903 2904 2905 2906 2907 2908
	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;
	READ_BUF(4);
	READ32(bmlen);
	READ_BUF(bmlen << 2);
	return 0;
}

static int decode_server_caps(struct xdr_stream *xdr, struct nfs4_server_caps_res *res)
{
A
Al Viro 已提交
2909
	__be32 *savep;
2910
	uint32_t attrlen, bitmap[2] = {0};
L
Linus Torvalds 已提交
2911 2912 2913 2914 2915 2916 2917 2918 2919 2920 2921 2922 2923 2924 2925 2926 2927 2928
	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;
	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:
2929
	dprintk("%s: xdr returned %d!\n", __func__, -status);
L
Linus Torvalds 已提交
2930 2931
	return status;
}
2932

L
Linus Torvalds 已提交
2933 2934
static int decode_statfs(struct xdr_stream *xdr, struct nfs_fsstat *fsstat)
{
A
Al Viro 已提交
2935
	__be32 *savep;
2936
	uint32_t attrlen, bitmap[2] = {0};
L
Linus Torvalds 已提交
2937
	int status;
2938

L
Linus Torvalds 已提交
2939 2940 2941 2942 2943 2944 2945 2946 2947 2948 2949 2950 2951 2952 2953 2954 2955 2956 2957 2958 2959 2960
	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:
2961
	dprintk("%s: xdr returned %d!\n", __func__, -status);
L
Linus Torvalds 已提交
2962 2963 2964 2965 2966
	return status;
}

static int decode_pathconf(struct xdr_stream *xdr, struct nfs_pathconf *pathconf)
{
A
Al Viro 已提交
2967
	__be32 *savep;
2968
	uint32_t attrlen, bitmap[2] = {0};
L
Linus Torvalds 已提交
2969
	int status;
2970

L
Linus Torvalds 已提交
2971 2972 2973 2974 2975 2976 2977 2978 2979 2980 2981 2982 2983 2984
	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:
2985
	dprintk("%s: xdr returned %d!\n", __func__, -status);
L
Linus Torvalds 已提交
2986 2987 2988 2989 2990
	return status;
}

static int decode_getfattr(struct xdr_stream *xdr, struct nfs_fattr *fattr, const struct nfs_server *server)
{
A
Al Viro 已提交
2991
	__be32 *savep;
L
Linus Torvalds 已提交
2992 2993 2994
	uint32_t attrlen,
		 bitmap[2] = {0},
		 type;
2995 2996
	int status;
	umode_t fmode = 0;
2997
	uint64_t fileid;
L
Linus Torvalds 已提交
2998 2999 3000 3001 3002 3003 3004 3005 3006 3007 3008 3009

	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_type(xdr, bitmap, &type)) != 0)
		goto xdr_error;
3010
	fattr->mode = nfs_type2fmt[type];
L
Linus Torvalds 已提交
3011 3012 3013 3014 3015

	if ((status = decode_attr_change(xdr, bitmap, &fattr->change_attr)) != 0)
		goto xdr_error;
	if ((status = decode_attr_size(xdr, bitmap, &fattr->size)) != 0)
		goto xdr_error;
3016
	if ((status = decode_attr_fsid(xdr, bitmap, &fattr->fsid)) != 0)
L
Linus Torvalds 已提交
3017 3018 3019
		goto xdr_error;
	if ((status = decode_attr_fileid(xdr, bitmap, &fattr->fileid)) != 0)
		goto xdr_error;
3020
	if ((status = decode_attr_fs_locations(xdr, bitmap, container_of(fattr,
3021
						struct nfs4_fs_locations,
3022 3023
						fattr))) != 0)
		goto xdr_error;
3024
	if ((status = decode_attr_mode(xdr, bitmap, &fmode)) != 0)
L
Linus Torvalds 已提交
3025 3026 3027 3028
		goto xdr_error;
	fattr->mode |= fmode;
	if ((status = decode_attr_nlink(xdr, bitmap, &fattr->nlink)) != 0)
		goto xdr_error;
3029
	if ((status = decode_attr_owner(xdr, bitmap, server->nfs_client, &fattr->uid)) != 0)
L
Linus Torvalds 已提交
3030
		goto xdr_error;
3031
	if ((status = decode_attr_group(xdr, bitmap, server->nfs_client, &fattr->gid)) != 0)
L
Linus Torvalds 已提交
3032 3033 3034 3035 3036 3037 3038 3039 3040 3041 3042
		goto xdr_error;
	if ((status = decode_attr_rdev(xdr, bitmap, &fattr->rdev)) != 0)
		goto xdr_error;
	if ((status = decode_attr_space_used(xdr, bitmap, &fattr->du.nfs3.used)) != 0)
		goto xdr_error;
	if ((status = decode_attr_time_access(xdr, bitmap, &fattr->atime)) != 0)
		goto xdr_error;
	if ((status = decode_attr_time_metadata(xdr, bitmap, &fattr->ctime)) != 0)
		goto xdr_error;
	if ((status = decode_attr_time_modify(xdr, bitmap, &fattr->mtime)) != 0)
		goto xdr_error;
3043 3044 3045 3046
	if ((status = decode_attr_mounted_on_fileid(xdr, bitmap, &fileid)) != 0)
		goto xdr_error;
	if (fattr->fileid == 0 && fileid != 0)
		fattr->fileid = fileid;
3047
	if ((status = verify_attr_len(xdr, savep, attrlen)) == 0)
3048
		fattr->valid = NFS_ATTR_FATTR_V4;
L
Linus Torvalds 已提交
3049
xdr_error:
3050
	dprintk("%s: xdr returned %d\n", __func__, -status);
L
Linus Torvalds 已提交
3051 3052 3053 3054 3055 3056
	return status;
}


static int decode_fsinfo(struct xdr_stream *xdr, struct nfs_fsinfo *fsinfo)
{
A
Al Viro 已提交
3057
	__be32 *savep;
L
Linus Torvalds 已提交
3058 3059 3060 3061 3062 3063 3064 3065 3066 3067 3068 3069 3070 3071 3072 3073 3074 3075 3076 3077 3078 3079 3080 3081 3082
	uint32_t attrlen, bitmap[2];
	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;

	status = verify_attr_len(xdr, savep, attrlen);
xdr_error:
3083
	dprintk("%s: xdr returned %d!\n", __func__, -status);
L
Linus Torvalds 已提交
3084 3085 3086 3087 3088
	return status;
}

static int decode_getfh(struct xdr_stream *xdr, struct nfs_fh *fh)
{
A
Al Viro 已提交
3089
	__be32 *p;
L
Linus Torvalds 已提交
3090 3091 3092
	uint32_t len;
	int status;

3093 3094 3095
	/* Zero handle first to allow comparisons */
	memset(fh, 0, sizeof(*fh));

L
Linus Torvalds 已提交
3096 3097 3098 3099 3100 3101 3102 3103 3104 3105 3106 3107 3108 3109 3110 3111 3112
	status = decode_op_hdr(xdr, OP_GETFH);
	if (status)
		return status;

	READ_BUF(4);
	READ32(len);
	if (len > NFS4_FHSIZE)
		return -EIO;
	fh->size = len;
	READ_BUF(len);
	COPYMEM(fh->data, len);
	return 0;
}

static int decode_link(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
{
	int status;
3113

L
Linus Torvalds 已提交
3114 3115 3116 3117 3118 3119 3120 3121 3122
	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
3123
static int decode_lock_denied (struct xdr_stream *xdr, struct file_lock *fl)
L
Linus Torvalds 已提交
3124
{
T
Trond Myklebust 已提交
3125
	uint64_t offset, length, clientid;
A
Al Viro 已提交
3126
	__be32 *p;
T
Trond Myklebust 已提交
3127
	uint32_t namelen, type;
L
Linus Torvalds 已提交
3128 3129

	READ_BUF(32);
T
Trond Myklebust 已提交
3130 3131 3132 3133 3134 3135 3136 3137 3138 3139 3140 3141 3142 3143
	READ64(offset);
	READ64(length);
	READ32(type);
	if (fl != NULL) {
		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;
	}
	READ64(clientid);
L
Linus Torvalds 已提交
3144 3145 3146 3147 3148
	READ32(namelen);
	READ_BUF(namelen);
	return -NFS4ERR_DENIED;
}

T
Trond Myklebust 已提交
3149
static int decode_lock(struct xdr_stream *xdr, struct nfs_lock_res *res)
L
Linus Torvalds 已提交
3150
{
A
Al Viro 已提交
3151
	__be32 *p;
L
Linus Torvalds 已提交
3152 3153 3154
	int status;

	status = decode_op_hdr(xdr, OP_LOCK);
3155 3156
	if (status == -EIO)
		goto out;
L
Linus Torvalds 已提交
3157
	if (status == 0) {
3158 3159
		READ_BUF(NFS4_STATEID_SIZE);
		COPYMEM(res->stateid.data, NFS4_STATEID_SIZE);
L
Linus Torvalds 已提交
3160
	} else if (status == -NFS4ERR_DENIED)
3161 3162 3163 3164 3165
		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
3166 3167 3168
	return status;
}

T
Trond Myklebust 已提交
3169
static int decode_lockt(struct xdr_stream *xdr, struct nfs_lockt_res *res)
L
Linus Torvalds 已提交
3170 3171 3172 3173
{
	int status;
	status = decode_op_hdr(xdr, OP_LOCKT);
	if (status == -NFS4ERR_DENIED)
T
Trond Myklebust 已提交
3174
		return decode_lock_denied(xdr, res->denied);
L
Linus Torvalds 已提交
3175 3176 3177
	return status;
}

T
Trond Myklebust 已提交
3178
static int decode_locku(struct xdr_stream *xdr, struct nfs_locku_res *res)
L
Linus Torvalds 已提交
3179
{
A
Al Viro 已提交
3180
	__be32 *p;
L
Linus Torvalds 已提交
3181 3182 3183
	int status;

	status = decode_op_hdr(xdr, OP_LOCKU);
3184 3185
	if (status != -EIO)
		nfs_increment_lock_seqid(status, res->seqid);
L
Linus Torvalds 已提交
3186
	if (status == 0) {
3187 3188
		READ_BUF(NFS4_STATEID_SIZE);
		COPYMEM(res->stateid.data, NFS4_STATEID_SIZE);
L
Linus Torvalds 已提交
3189 3190 3191 3192 3193 3194 3195 3196 3197 3198 3199 3200
	}
	return status;
}

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
3201
	__be32 *p;
L
Linus Torvalds 已提交
3202 3203 3204 3205 3206
	uint32_t limit_type, nblocks, blocksize;

	READ_BUF(12);
	READ32(limit_type);
	switch (limit_type) {
A
Andy Adamson 已提交
3207 3208 3209 3210 3211 3212 3213
	case 1:
		READ64(*maxsize);
		break;
	case 2:
		READ32(nblocks);
		READ32(blocksize);
		*maxsize = (uint64_t)nblocks * (uint64_t)blocksize;
L
Linus Torvalds 已提交
3214 3215 3216 3217 3218 3219
	}
	return 0;
}

static int decode_delegation(struct xdr_stream *xdr, struct nfs_openres *res)
{
A
Andy Adamson 已提交
3220 3221
	__be32 *p;
	uint32_t delegation_type;
L
Linus Torvalds 已提交
3222 3223 3224 3225 3226 3227 3228

	READ_BUF(4);
	READ32(delegation_type);
	if (delegation_type == NFS4_OPEN_DELEGATE_NONE) {
		res->delegation_type = 0;
		return 0;
	}
3229 3230
	READ_BUF(NFS4_STATEID_SIZE+4);
	COPYMEM(res->delegation.data, NFS4_STATEID_SIZE);
L
Linus Torvalds 已提交
3231
	READ32(res->do_recall);
A
Andy Adamson 已提交
3232

L
Linus Torvalds 已提交
3233
	switch (delegation_type) {
A
Andy Adamson 已提交
3234 3235 3236 3237 3238 3239
	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
3240 3241
				return -EIO;
	}
3242
	return decode_ace(xdr, NULL, res->server->nfs_client);
L
Linus Torvalds 已提交
3243 3244 3245 3246
}

static int decode_open(struct xdr_stream *xdr, struct nfs_openres *res)
{
A
Andy Adamson 已提交
3247
	__be32 *p;
3248
	uint32_t savewords, bmlen, i;
A
Andy Adamson 已提交
3249
	int status;
L
Linus Torvalds 已提交
3250

A
Andy Adamson 已提交
3251
	status = decode_op_hdr(xdr, OP_OPEN);
3252 3253
	if (status != -EIO)
		nfs_increment_open_seqid(status, res->seqid);
A
Andy Adamson 已提交
3254 3255 3256 3257
	if (status)
		return status;
	READ_BUF(NFS4_STATEID_SIZE);
	COPYMEM(res->stateid.data, NFS4_STATEID_SIZE);
L
Linus Torvalds 已提交
3258

A
Andy Adamson 已提交
3259
	decode_change_info(xdr, &res->cinfo);
L
Linus Torvalds 已提交
3260

A
Andy Adamson 已提交
3261 3262 3263 3264 3265
	READ_BUF(8);
	READ32(res->rflags);
	READ32(bmlen);
	if (bmlen > 10)
		goto xdr_error;
L
Linus Torvalds 已提交
3266

A
Andy Adamson 已提交
3267
	READ_BUF(bmlen << 2);
3268 3269 3270 3271 3272 3273
	savewords = min_t(uint32_t, bmlen, NFS4_BITMAP_SIZE);
	for (i = 0; i < savewords; ++i)
		READ32(res->attrset[i]);
	for (; i < NFS4_BITMAP_SIZE; i++)
		res->attrset[i] = 0;

L
Linus Torvalds 已提交
3274 3275
	return decode_delegation(xdr, res);
xdr_error:
3276
	dprintk("%s: Bitmap too large! Length = %u\n", __func__, bmlen);
L
Linus Torvalds 已提交
3277 3278 3279 3280 3281
	return -EIO;
}

static int decode_open_confirm(struct xdr_stream *xdr, struct nfs_open_confirmres *res)
{
A
Andy Adamson 已提交
3282
	__be32 *p;
L
Linus Torvalds 已提交
3283 3284
	int status;

A
Andy Adamson 已提交
3285
	status = decode_op_hdr(xdr, OP_OPEN_CONFIRM);
3286 3287
	if (status != -EIO)
		nfs_increment_open_seqid(status, res->seqid);
A
Andy Adamson 已提交
3288 3289 3290 3291 3292
	if (status)
		return status;
	READ_BUF(NFS4_STATEID_SIZE);
	COPYMEM(res->stateid.data, NFS4_STATEID_SIZE);
	return 0;
L
Linus Torvalds 已提交
3293 3294 3295 3296
}

static int decode_open_downgrade(struct xdr_stream *xdr, struct nfs_closeres *res)
{
A
Al Viro 已提交
3297
	__be32 *p;
L
Linus Torvalds 已提交
3298 3299 3300
	int status;

	status = decode_op_hdr(xdr, OP_OPEN_DOWNGRADE);
3301 3302
	if (status != -EIO)
		nfs_increment_open_seqid(status, res->seqid);
L
Linus Torvalds 已提交
3303 3304
	if (status)
		return status;
3305 3306
	READ_BUF(NFS4_STATEID_SIZE);
	COPYMEM(res->stateid.data, NFS4_STATEID_SIZE);
L
Linus Torvalds 已提交
3307 3308 3309 3310 3311 3312 3313 3314 3315 3316 3317 3318 3319 3320 3321 3322
	return 0;
}

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

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

static int decode_read(struct xdr_stream *xdr, struct rpc_rqst *req, struct nfs_readres *res)
{
	struct kvec *iov = req->rq_rcv_buf.head;
A
Al Viro 已提交
3323
	__be32 *p;
L
Linus Torvalds 已提交
3324 3325 3326 3327 3328 3329 3330 3331 3332 3333 3334 3335
	uint32_t count, eof, recvd, hdrlen;
	int status;

	status = decode_op_hdr(xdr, OP_READ);
	if (status)
		return status;
	READ_BUF(8);
	READ32(eof);
	READ32(count);
	hdrlen = (u8 *) p - (u8 *) iov->iov_base;
	recvd = req->rq_rcv_buf.len - hdrlen;
	if (count > recvd) {
3336
		dprintk("NFS: server cheating in read reply: "
L
Linus Torvalds 已提交
3337 3338 3339 3340 3341 3342 3343 3344 3345 3346 3347 3348 3349 3350 3351
				"count %u > recvd %u\n", count, recvd);
		count = recvd;
		eof = 0;
	}
	xdr_read_pages(xdr, count);
	res->eof = eof;
	res->count = count;
	return 0;
}

static int decode_readdir(struct xdr_stream *xdr, struct rpc_rqst *req, struct nfs4_readdir_res *readdir)
{
	struct xdr_buf	*rcvbuf = &req->rq_rcv_buf;
	struct page	*page = *rcvbuf->pages;
	struct kvec	*iov = rcvbuf->head;
3352 3353
	size_t		hdrlen;
	u32		recvd, pglen = rcvbuf->page_len;
A
Al Viro 已提交
3354
	__be32		*end, *entry, *p, *kaddr;
3355
	unsigned int	nr = 0;
3356
	int		status;
L
Linus Torvalds 已提交
3357 3358 3359 3360 3361 3362

	status = decode_op_hdr(xdr, OP_READDIR);
	if (status)
		return status;
	READ_BUF(8);
	COPYMEM(readdir->verifier.data, 8);
3363 3364
	dprintk("%s: verifier = %08x:%08x\n",
			__func__,
3365 3366 3367
			((u32 *)readdir->verifier.data)[0],
			((u32 *)readdir->verifier.data)[1]);

L
Linus Torvalds 已提交
3368 3369 3370 3371 3372 3373 3374 3375

	hdrlen = (char *) p - (char *) iov->iov_base;
	recvd = rcvbuf->len - hdrlen;
	if (pglen > recvd)
		pglen = recvd;
	xdr_read_pages(xdr, pglen);

	BUG_ON(pglen + readdir->pgbase > PAGE_CACHE_SIZE);
A
Al Viro 已提交
3376
	kaddr = p = kmap_atomic(page, KM_USER0);
3377
	end = p + ((pglen + readdir->pgbase) >> 2);
L
Linus Torvalds 已提交
3378
	entry = p;
3379 3380 3381 3382 3383 3384

	/* Make sure the packet actually has a value_follows and EOF entry */
	if ((entry + 1) > end)
		goto short_pkt;

	for (; *p++; nr++) {
3385
		u32 len, attrlen, xlen;
3386
		if (end - p < 3)
L
Linus Torvalds 已提交
3387
			goto short_pkt;
3388
		dprintk("cookie = %Lu, ", *((unsigned long long *)p));
L
Linus Torvalds 已提交
3389 3390 3391
		p += 2;			/* cookie */
		len = ntohl(*p++);	/* filename length */
		if (len > NFS4_MAXNAMLEN) {
3392 3393
			dprintk("NFS: giant filename in readdir (len 0x%x)\n",
					len);
L
Linus Torvalds 已提交
3394 3395
			goto err_unmap;
		}
3396 3397
		xlen = XDR_QUADLEN(len);
		if (end - p < xlen + 1)
L
Linus Torvalds 已提交
3398
			goto short_pkt;
3399 3400
		dprintk("filename = %*s\n", len, (char *)p);
		p += xlen;
L
Linus Torvalds 已提交
3401
		len = ntohl(*p++);	/* bitmap length */
3402
		if (end - p < len + 1)
L
Linus Torvalds 已提交
3403
			goto short_pkt;
3404
		p += len;
L
Linus Torvalds 已提交
3405
		attrlen = XDR_QUADLEN(ntohl(*p++));
3406
		if (end - p < attrlen + 2)
L
Linus Torvalds 已提交
3407
			goto short_pkt;
3408
		p += attrlen;		/* attributes */
L
Linus Torvalds 已提交
3409 3410
		entry = p;
	}
3411 3412 3413 3414 3415 3416 3417 3418 3419
	/*
	 * Apparently some server sends responses that are a valid size, but
	 * contain no entries, and have value_follows==0 and EOF==0. For
	 * those, just set the EOF marker.
	 */
	if (!nr && entry[1] == 0) {
		dprintk("NFS: readdir reply truncated!\n");
		entry[1] = 1;
	}
3420
out:
L
Linus Torvalds 已提交
3421 3422 3423
	kunmap_atomic(kaddr, KM_USER0);
	return 0;
short_pkt:
3424 3425 3426 3427 3428 3429 3430 3431 3432
	/*
	 * When we get a short packet there are 2 possibilities. We can
	 * return an error, or fix up the response to look like a valid
	 * response and return what we have so far. If there are no
	 * entries and the packet was short, then return -EIO. If there
	 * are valid entries in the response, return them and pretend that
	 * the call was successful, but incomplete. The caller can retry the
	 * readdir starting at the last cookie.
	 */
3433
	dprintk("%s: short packet at entry %d\n", __func__, nr);
L
Linus Torvalds 已提交
3434
	entry[0] = entry[1] = 0;
3435 3436
	if (nr)
		goto out;
L
Linus Torvalds 已提交
3437 3438 3439 3440 3441 3442 3443 3444 3445
err_unmap:
	kunmap_atomic(kaddr, KM_USER0);
	return -errno_NFSERR_IO;
}

static int decode_readlink(struct xdr_stream *xdr, struct rpc_rqst *req)
{
	struct xdr_buf *rcvbuf = &req->rq_rcv_buf;
	struct kvec *iov = rcvbuf->head;
3446 3447
	size_t hdrlen;
	u32 len, recvd;
A
Al Viro 已提交
3448
	__be32 *p;
L
Linus Torvalds 已提交
3449 3450 3451 3452 3453 3454 3455 3456 3457 3458 3459
	char *kaddr;
	int status;

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

	/* Convert length of symlink */
	READ_BUF(4);
	READ32(len);
	if (len >= rcvbuf->page_len || len <= 0) {
3460
		dprintk("nfs: server returned giant symlink!\n");
L
Linus Torvalds 已提交
3461 3462 3463 3464 3465
		return -ENAMETOOLONG;
	}
	hdrlen = (char *) xdr->p - (char *) iov->iov_base;
	recvd = req->rq_rcv_buf.len - hdrlen;
	if (recvd < len) {
3466
		dprintk("NFS: server cheating in readlink reply: "
L
Linus Torvalds 已提交
3467 3468 3469 3470 3471 3472 3473 3474 3475 3476 3477 3478 3479 3480 3481 3482 3483 3484 3485 3486 3487 3488 3489 3490 3491 3492 3493 3494 3495 3496 3497 3498 3499 3500 3501 3502 3503 3504 3505 3506 3507 3508 3509 3510 3511 3512 3513 3514 3515
				"count %u > recvd %u\n", len, recvd);
		return -EIO;
	}
	xdr_read_pages(xdr, len);
	/*
	 * 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).
	 */
	kaddr = (char *)kmap_atomic(rcvbuf->pages[0], KM_USER0);
	kaddr[len+rcvbuf->page_base] = '\0';
	kunmap_atomic(kaddr, KM_USER0);
	return 0;
}

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);
}

3516 3517 3518 3519 3520 3521
static int
decode_restorefh(struct xdr_stream *xdr)
{
	return decode_op_hdr(xdr, OP_RESTOREFH);
}

3522 3523 3524
static int decode_getacl(struct xdr_stream *xdr, struct rpc_rqst *req,
		size_t *acl_len)
{
A
Al Viro 已提交
3525
	__be32 *savep;
3526 3527 3528 3529 3530 3531 3532 3533 3534 3535 3536 3537 3538 3539 3540 3541
	uint32_t attrlen,
		 bitmap[2] = {0};
	struct kvec *iov = req->rq_rcv_buf.head;
	int status;

	*acl_len = 0;
	if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
		goto out;
	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)) {
3542 3543
		size_t hdrlen;
		u32 recvd;
3544 3545 3546 3547 3548 3549

		/* We ignore &savep and don't do consistency checks on
		 * the attr length.  Let userspace figure it out.... */
		hdrlen = (u8 *)xdr->p - (u8 *)iov->iov_base;
		recvd = req->rq_rcv_buf.len - hdrlen;
		if (attrlen > recvd) {
3550
			dprintk("NFS: server cheating in getattr"
3551 3552 3553 3554
					" acl reply: attrlen %u > recvd %u\n",
					attrlen, recvd);
			return -EINVAL;
		}
3555
		xdr_read_pages(xdr, attrlen);
3556
		*acl_len = attrlen;
J
J. Bruce Fields 已提交
3557 3558
	} else
		status = -EOPNOTSUPP;
3559 3560 3561 3562 3563

out:
	return status;
}

L
Linus Torvalds 已提交
3564 3565 3566 3567 3568 3569 3570 3571
static int
decode_savefh(struct xdr_stream *xdr)
{
	return decode_op_hdr(xdr, OP_SAVEFH);
}

static int decode_setattr(struct xdr_stream *xdr, struct nfs_setattrres *res)
{
A
Al Viro 已提交
3572
	__be32 *p;
L
Linus Torvalds 已提交
3573 3574 3575 3576 3577 3578 3579 3580 3581 3582 3583 3584
	uint32_t bmlen;
	int status;

	status = decode_op_hdr(xdr, OP_SETATTR);
	if (status)
		return status;
	READ_BUF(4);
	READ32(bmlen);
	READ_BUF(bmlen << 2);
	return 0;
}

3585
static int decode_setclientid(struct xdr_stream *xdr, struct nfs_client *clp)
L
Linus Torvalds 已提交
3586
{
A
Al Viro 已提交
3587
	__be32 *p;
L
Linus Torvalds 已提交
3588 3589 3590 3591 3592 3593
	uint32_t opnum;
	int32_t nfserr;

	READ_BUF(8);
	READ32(opnum);
	if (opnum != OP_SETCLIENTID) {
3594
		dprintk("nfs: decode_setclientid: Server returned operation"
3595
			" %d\n", opnum);
L
Linus Torvalds 已提交
3596 3597 3598 3599
		return -EIO;
	}
	READ32(nfserr);
	if (nfserr == NFS_OK) {
3600
		READ_BUF(8 + NFS4_VERIFIER_SIZE);
L
Linus Torvalds 已提交
3601
		READ64(clp->cl_clientid);
3602
		COPYMEM(clp->cl_confirm.data, NFS4_VERIFIER_SIZE);
L
Linus Torvalds 已提交
3603 3604 3605 3606 3607 3608 3609 3610 3611 3612 3613 3614 3615 3616
	} else if (nfserr == NFSERR_CLID_INUSE) {
		uint32_t len;

		/* skip netid string */
		READ_BUF(4);
		READ32(len);
		READ_BUF(len);

		/* skip uaddr string */
		READ_BUF(4);
		READ32(len);
		READ_BUF(len);
		return -NFSERR_CLID_INUSE;
	} else
3617
		return nfs4_stat_to_errno(nfserr);
L
Linus Torvalds 已提交
3618 3619 3620 3621 3622 3623 3624 3625 3626 3627 3628

	return 0;
}

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

static int decode_write(struct xdr_stream *xdr, struct nfs_writeres *res)
{
A
Al Viro 已提交
3629
	__be32 *p;
L
Linus Torvalds 已提交
3630 3631 3632 3633 3634 3635 3636 3637 3638 3639 3640 3641 3642 3643 3644 3645 3646 3647
	int status;

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

	READ_BUF(16);
	READ32(res->count);
	READ32(res->verf->committed);
	COPYMEM(res->verf->verifier, 8);
	return 0;
}

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

3648 3649 3650 3651
/*
 * END OF "GENERIC" DECODE ROUTINES.
 */

L
Linus Torvalds 已提交
3652 3653 3654
/*
 * Decode OPEN_DOWNGRADE response
 */
A
Al Viro 已提交
3655
static int nfs4_xdr_dec_open_downgrade(struct rpc_rqst *rqstp, __be32 *p, struct nfs_closeres *res)
L
Linus Torvalds 已提交
3656
{
A
Andy Adamson 已提交
3657 3658 3659 3660 3661 3662 3663 3664 3665 3666 3667 3668
	struct xdr_stream xdr;
	struct compound_hdr hdr;
	int status;

	xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
	status = decode_compound_hdr(&xdr, &hdr);
	if (status)
		goto out;
	status = decode_putfh(&xdr);
	if (status)
		goto out;
	status = decode_open_downgrade(&xdr, res);
3669 3670 3671
	if (status != 0)
		goto out;
	decode_getfattr(&xdr, res->fattr, res->server);
L
Linus Torvalds 已提交
3672
out:
A
Andy Adamson 已提交
3673
	return status;
L
Linus Torvalds 已提交
3674 3675 3676 3677 3678
}

/*
 * Decode ACCESS response
 */
A
Al Viro 已提交
3679
static int nfs4_xdr_dec_access(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_accessres *res)
L
Linus Torvalds 已提交
3680 3681 3682 3683
{
	struct xdr_stream xdr;
	struct compound_hdr hdr;
	int status;
3684

L
Linus Torvalds 已提交
3685 3686 3687
	xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
	if ((status = decode_compound_hdr(&xdr, &hdr)) != 0)
		goto out;
3688 3689 3690 3691 3692 3693 3694
	status = decode_putfh(&xdr);
	if (status != 0)
		goto out;
	status = decode_access(&xdr, res);
	if (status != 0)
		goto out;
	decode_getfattr(&xdr, res->fattr, res->server);
L
Linus Torvalds 已提交
3695 3696 3697 3698 3699 3700 3701
out:
	return status;
}

/*
 * Decode LOOKUP response
 */
A
Al Viro 已提交
3702
static int nfs4_xdr_dec_lookup(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_lookup_res *res)
L
Linus Torvalds 已提交
3703 3704 3705 3706
{
	struct xdr_stream xdr;
	struct compound_hdr hdr;
	int status;
3707

L
Linus Torvalds 已提交
3708 3709 3710 3711 3712 3713 3714 3715 3716 3717 3718 3719 3720 3721 3722 3723 3724
	xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
	if ((status = decode_compound_hdr(&xdr, &hdr)) != 0)
		goto out;
	if ((status = decode_putfh(&xdr)) != 0)
		goto out;
	if ((status = decode_lookup(&xdr)) != 0)
		goto out;
	if ((status = decode_getfh(&xdr, res->fh)) != 0)
		goto out;
	status = decode_getfattr(&xdr, res->fattr, res->server);
out:
	return status;
}

/*
 * Decode LOOKUP_ROOT response
 */
A
Al Viro 已提交
3725
static int nfs4_xdr_dec_lookup_root(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_lookup_res *res)
L
Linus Torvalds 已提交
3726 3727 3728 3729
{
	struct xdr_stream xdr;
	struct compound_hdr hdr;
	int status;
3730

L
Linus Torvalds 已提交
3731 3732 3733 3734 3735 3736 3737 3738 3739 3740 3741 3742 3743 3744
	xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
	if ((status = decode_compound_hdr(&xdr, &hdr)) != 0)
		goto out;
	if ((status = decode_putrootfh(&xdr)) != 0)
		goto out;
	if ((status = decode_getfh(&xdr, res->fh)) == 0)
		status = decode_getfattr(&xdr, res->fattr, res->server);
out:
	return status;
}

/*
 * Decode REMOVE response
 */
3745
static int nfs4_xdr_dec_remove(struct rpc_rqst *rqstp, __be32 *p, struct nfs_removeres *res)
L
Linus Torvalds 已提交
3746 3747 3748 3749
{
	struct xdr_stream xdr;
	struct compound_hdr hdr;
	int status;
3750

L
Linus Torvalds 已提交
3751 3752 3753
	xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
	if ((status = decode_compound_hdr(&xdr, &hdr)) != 0)
		goto out;
3754 3755 3756 3757
	if ((status = decode_putfh(&xdr)) != 0)
		goto out;
	if ((status = decode_remove(&xdr, &res->cinfo)) != 0)
		goto out;
3758
	decode_getfattr(&xdr, &res->dir_attr, res->server);
L
Linus Torvalds 已提交
3759 3760 3761 3762 3763 3764 3765
out:
	return status;
}

/*
 * Decode RENAME response
 */
A
Al Viro 已提交
3766
static int nfs4_xdr_dec_rename(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_rename_res *res)
L
Linus Torvalds 已提交
3767 3768 3769 3770
{
	struct xdr_stream xdr;
	struct compound_hdr hdr;
	int status;
3771

L
Linus Torvalds 已提交
3772 3773 3774 3775 3776 3777 3778 3779 3780
	xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
	if ((status = decode_compound_hdr(&xdr, &hdr)) != 0)
		goto out;
	if ((status = decode_putfh(&xdr)) != 0)
		goto out;
	if ((status = decode_savefh(&xdr)) != 0)
		goto out;
	if ((status = decode_putfh(&xdr)) != 0)
		goto out;
3781 3782 3783 3784 3785 3786 3787 3788
	if ((status = decode_rename(&xdr, &res->old_cinfo, &res->new_cinfo)) != 0)
		goto out;
	/* Current FH is target directory */
	if (decode_getfattr(&xdr, res->new_fattr, res->server) != 0)
		goto out;
	if ((status = decode_restorefh(&xdr)) != 0)
		goto out;
	decode_getfattr(&xdr, res->old_fattr, res->server);
L
Linus Torvalds 已提交
3789 3790 3791 3792 3793 3794 3795
out:
	return status;
}

/*
 * Decode LINK response
 */
A
Al Viro 已提交
3796
static int nfs4_xdr_dec_link(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_link_res *res)
L
Linus Torvalds 已提交
3797 3798 3799 3800
{
	struct xdr_stream xdr;
	struct compound_hdr hdr;
	int status;
3801

L
Linus Torvalds 已提交
3802 3803 3804 3805 3806 3807 3808 3809 3810
	xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
	if ((status = decode_compound_hdr(&xdr, &hdr)) != 0)
		goto out;
	if ((status = decode_putfh(&xdr)) != 0)
		goto out;
	if ((status = decode_savefh(&xdr)) != 0)
		goto out;
	if ((status = decode_putfh(&xdr)) != 0)
		goto out;
3811 3812 3813 3814 3815 3816 3817 3818 3819 3820 3821
	if ((status = decode_link(&xdr, &res->cinfo)) != 0)
		goto out;
	/*
	 * Note order: OP_LINK leaves the directory as the current
	 *             filehandle.
	 */
	if (decode_getfattr(&xdr, res->dir_attr, res->server) != 0)
		goto out;
	if ((status = decode_restorefh(&xdr)) != 0)
		goto out;
	decode_getfattr(&xdr, res->fattr, res->server);
L
Linus Torvalds 已提交
3822 3823 3824 3825 3826 3827 3828
out:
	return status;
}

/*
 * Decode CREATE response
 */
A
Al Viro 已提交
3829
static int nfs4_xdr_dec_create(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_create_res *res)
L
Linus Torvalds 已提交
3830 3831 3832 3833
{
	struct xdr_stream xdr;
	struct compound_hdr hdr;
	int status;
3834

L
Linus Torvalds 已提交
3835 3836 3837 3838 3839
	xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
	if ((status = decode_compound_hdr(&xdr, &hdr)) != 0)
		goto out;
	if ((status = decode_putfh(&xdr)) != 0)
		goto out;
3840 3841
	if ((status = decode_savefh(&xdr)) != 0)
		goto out;
L
Linus Torvalds 已提交
3842 3843 3844 3845
	if ((status = decode_create(&xdr,&res->dir_cinfo)) != 0)
		goto out;
	if ((status = decode_getfh(&xdr, res->fh)) != 0)
		goto out;
3846 3847 3848 3849 3850
	if (decode_getfattr(&xdr, res->fattr, res->server) != 0)
		goto out;
	if ((status = decode_restorefh(&xdr)) != 0)
		goto out;
	decode_getfattr(&xdr, res->dir_fattr, res->server);
L
Linus Torvalds 已提交
3851 3852 3853 3854 3855 3856 3857
out:
	return status;
}

/*
 * Decode SYMLINK response
 */
A
Al Viro 已提交
3858
static int nfs4_xdr_dec_symlink(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_create_res *res)
L
Linus Torvalds 已提交
3859 3860 3861 3862 3863 3864 3865
{
	return nfs4_xdr_dec_create(rqstp, p, res);
}

/*
 * Decode GETATTR response
 */
A
Al Viro 已提交
3866
static int nfs4_xdr_dec_getattr(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_getattr_res *res)
L
Linus Torvalds 已提交
3867 3868 3869 3870
{
	struct xdr_stream xdr;
	struct compound_hdr hdr;
	int status;
3871

L
Linus Torvalds 已提交
3872 3873 3874 3875 3876 3877 3878 3879 3880 3881 3882 3883
	xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
	status = decode_compound_hdr(&xdr, &hdr);
	if (status)
		goto out;
	status = decode_putfh(&xdr);
	if (status)
		goto out;
	status = decode_getfattr(&xdr, res->fattr, res->server);
out:
	return status;
}

3884 3885 3886 3887
/*
 * Encode an SETACL request
 */
static int
A
Al Viro 已提交
3888
nfs4_xdr_enc_setacl(struct rpc_rqst *req, __be32 *p, struct nfs_setaclargs *args)
3889
{
A
Andy Adamson 已提交
3890 3891
	struct xdr_stream xdr;
	struct compound_hdr hdr = {
3892
		.nops   = 0,
A
Andy Adamson 已提交
3893 3894 3895 3896 3897
	};
	int status;

	xdr_init_encode(&xdr, &req->rq_snd_buf, p);
	encode_compound_hdr(&xdr, &hdr);
3898
	encode_putfh(&xdr, args->fh, &hdr);
3899 3900
	status = encode_setacl(&xdr, args, &hdr);
	encode_nops(&hdr);
A
Andy Adamson 已提交
3901
	return status;
3902
}
A
Andy Adamson 已提交
3903

3904 3905 3906 3907
/*
 * Decode SETACL response
 */
static int
A
Al Viro 已提交
3908
nfs4_xdr_dec_setacl(struct rpc_rqst *rqstp, __be32 *p, void *res)
3909 3910 3911 3912 3913 3914 3915 3916 3917 3918 3919 3920 3921 3922 3923 3924
{
	struct xdr_stream xdr;
	struct compound_hdr hdr;
	int status;

	xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
	status = decode_compound_hdr(&xdr, &hdr);
	if (status)
		goto out;
	status = decode_putfh(&xdr);
	if (status)
		goto out;
	status = decode_setattr(&xdr, res);
out:
	return status;
}
L
Linus Torvalds 已提交
3925

3926 3927 3928 3929
/*
 * Decode GETACL response
 */
static int
A
Al Viro 已提交
3930
nfs4_xdr_dec_getacl(struct rpc_rqst *rqstp, __be32 *p, size_t *acl_len)
3931 3932 3933 3934 3935 3936 3937 3938 3939 3940 3941 3942 3943 3944 3945 3946 3947 3948
{
	struct xdr_stream xdr;
	struct compound_hdr hdr;
	int status;

	xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
	status = decode_compound_hdr(&xdr, &hdr);
	if (status)
		goto out;
	status = decode_putfh(&xdr);
	if (status)
		goto out;
	status = decode_getacl(&xdr, rqstp, acl_len);

out:
	return status;
}

L
Linus Torvalds 已提交
3949 3950 3951
/*
 * Decode CLOSE response
 */
A
Al Viro 已提交
3952
static int nfs4_xdr_dec_close(struct rpc_rqst *rqstp, __be32 *p, struct nfs_closeres *res)
L
Linus Torvalds 已提交
3953
{
A
Andy Adamson 已提交
3954 3955 3956 3957 3958 3959 3960 3961 3962 3963 3964 3965
	struct xdr_stream xdr;
	struct compound_hdr hdr;
	int status;

	xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
	status = decode_compound_hdr(&xdr, &hdr);
	if (status)
		goto out;
	status = decode_putfh(&xdr);
	if (status)
		goto out;
	status = decode_close(&xdr, res);
3966 3967 3968 3969 3970 3971 3972 3973 3974
	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.
	 */
	decode_getfattr(&xdr, res->fattr, res->server);
L
Linus Torvalds 已提交
3975
out:
A
Andy Adamson 已提交
3976
	return status;
L
Linus Torvalds 已提交
3977 3978 3979 3980 3981
}

/*
 * Decode OPEN response
 */
A
Al Viro 已提交
3982
static int nfs4_xdr_dec_open(struct rpc_rqst *rqstp, __be32 *p, struct nfs_openres *res)
L
Linus Torvalds 已提交
3983
{
A
Andy Adamson 已提交
3984 3985 3986 3987 3988 3989 3990 3991 3992 3993 3994 3995 3996 3997 3998
	struct xdr_stream xdr;
	struct compound_hdr hdr;
	int status;

	xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
	status = decode_compound_hdr(&xdr, &hdr);
	if (status)
		goto out;
	status = decode_putfh(&xdr);
	if (status)
		goto out;
	status = decode_savefh(&xdr);
	if (status)
		goto out;
	status = decode_open(&xdr, res);
3999 4000
	if (status)
		goto out;
4001
	if (decode_getfh(&xdr, &res->fh) != 0)
L
Linus Torvalds 已提交
4002
		goto out;
4003 4004
	if (decode_getfattr(&xdr, res->f_attr, res->server) != 0)
		goto out;
4005
	if (decode_restorefh(&xdr) != 0)
4006 4007
		goto out;
	decode_getfattr(&xdr, res->dir_attr, res->server);
L
Linus Torvalds 已提交
4008
out:
A
Andy Adamson 已提交
4009
	return status;
L
Linus Torvalds 已提交
4010 4011 4012 4013 4014
}

/*
 * Decode OPEN_CONFIRM response
 */
A
Al Viro 已提交
4015
static int nfs4_xdr_dec_open_confirm(struct rpc_rqst *rqstp, __be32 *p, struct nfs_open_confirmres *res)
L
Linus Torvalds 已提交
4016
{
A
Andy Adamson 已提交
4017 4018 4019 4020 4021 4022 4023 4024 4025 4026 4027 4028
	struct xdr_stream xdr;
	struct compound_hdr hdr;
	int status;

	xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
	status = decode_compound_hdr(&xdr, &hdr);
	if (status)
		goto out;
	status = decode_putfh(&xdr);
	if (status)
		goto out;
	status = decode_open_confirm(&xdr, res);
L
Linus Torvalds 已提交
4029
out:
A
Andy Adamson 已提交
4030
	return status;
L
Linus Torvalds 已提交
4031 4032 4033 4034 4035
}

/*
 * Decode OPEN response
 */
A
Al Viro 已提交
4036
static int nfs4_xdr_dec_open_noattr(struct rpc_rqst *rqstp, __be32 *p, struct nfs_openres *res)
L
Linus Torvalds 已提交
4037
{
A
Andy Adamson 已提交
4038 4039 4040 4041 4042 4043 4044 4045 4046 4047 4048 4049 4050 4051
	struct xdr_stream xdr;
	struct compound_hdr hdr;
	int status;

	xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
	status = decode_compound_hdr(&xdr, &hdr);
	if (status)
		goto out;
	status = decode_putfh(&xdr);
	if (status)
		goto out;
	status = decode_open(&xdr, res);
	if (status)
		goto out;
4052
	decode_getfattr(&xdr, res->f_attr, res->server);
L
Linus Torvalds 已提交
4053
out:
A
Andy Adamson 已提交
4054
	return status;
L
Linus Torvalds 已提交
4055 4056 4057 4058 4059
}

/*
 * Decode SETATTR response
 */
A
Al Viro 已提交
4060
static int nfs4_xdr_dec_setattr(struct rpc_rqst *rqstp, __be32 *p, struct nfs_setattrres *res)
L
Linus Torvalds 已提交
4061
{
A
Andy Adamson 已提交
4062 4063 4064 4065 4066 4067 4068 4069 4070 4071 4072 4073 4074 4075
	struct xdr_stream xdr;
	struct compound_hdr hdr;
	int status;

	xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
	status = decode_compound_hdr(&xdr, &hdr);
	if (status)
		goto out;
	status = decode_putfh(&xdr);
	if (status)
		goto out;
	status = decode_setattr(&xdr, res);
	if (status)
		goto out;
4076
	decode_getfattr(&xdr, res->fattr, res->server);
L
Linus Torvalds 已提交
4077
out:
A
Andy Adamson 已提交
4078
	return status;
L
Linus Torvalds 已提交
4079 4080 4081 4082 4083
}

/*
 * Decode LOCK response
 */
A
Al Viro 已提交
4084
static int nfs4_xdr_dec_lock(struct rpc_rqst *rqstp, __be32 *p, struct nfs_lock_res *res)
L
Linus Torvalds 已提交
4085 4086 4087 4088 4089 4090 4091 4092 4093 4094 4095 4096 4097 4098 4099 4100 4101 4102 4103 4104
{
	struct xdr_stream xdr;
	struct compound_hdr hdr;
	int status;

	xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
	status = decode_compound_hdr(&xdr, &hdr);
	if (status)
		goto out;
	status = decode_putfh(&xdr);
	if (status)
		goto out;
	status = decode_lock(&xdr, res);
out:
	return status;
}

/*
 * Decode LOCKT response
 */
A
Al Viro 已提交
4105
static int nfs4_xdr_dec_lockt(struct rpc_rqst *rqstp, __be32 *p, struct nfs_lockt_res *res)
L
Linus Torvalds 已提交
4106 4107 4108 4109 4110 4111 4112 4113 4114 4115 4116 4117 4118 4119 4120 4121 4122 4123 4124 4125
{
	struct xdr_stream xdr;
	struct compound_hdr hdr;
	int status;

	xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
	status = decode_compound_hdr(&xdr, &hdr);
	if (status)
		goto out;
	status = decode_putfh(&xdr);
	if (status)
		goto out;
	status = decode_lockt(&xdr, res);
out:
	return status;
}

/*
 * Decode LOCKU response
 */
A
Al Viro 已提交
4126
static int nfs4_xdr_dec_locku(struct rpc_rqst *rqstp, __be32 *p, struct nfs_locku_res *res)
L
Linus Torvalds 已提交
4127 4128 4129 4130 4131 4132 4133 4134 4135 4136 4137 4138 4139 4140 4141 4142 4143 4144 4145 4146
{
	struct xdr_stream xdr;
	struct compound_hdr hdr;
	int status;

	xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
	status = decode_compound_hdr(&xdr, &hdr);
	if (status)
		goto out;
	status = decode_putfh(&xdr);
	if (status)
		goto out;
	status = decode_locku(&xdr, res);
out:
	return status;
}

/*
 * Decode READLINK response
 */
A
Al Viro 已提交
4147
static int nfs4_xdr_dec_readlink(struct rpc_rqst *rqstp, __be32 *p, void *res)
L
Linus Torvalds 已提交
4148 4149 4150 4151 4152 4153 4154 4155 4156 4157 4158 4159 4160 4161 4162 4163 4164 4165 4166 4167
{
	struct xdr_stream xdr;
	struct compound_hdr hdr;
	int status;

	xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
	status = decode_compound_hdr(&xdr, &hdr);
	if (status)
		goto out;
	status = decode_putfh(&xdr);
	if (status)
		goto out;
	status = decode_readlink(&xdr, rqstp);
out:
	return status;
}

/*
 * Decode READDIR response
 */
A
Al Viro 已提交
4168
static int nfs4_xdr_dec_readdir(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_readdir_res *res)
L
Linus Torvalds 已提交
4169 4170 4171 4172 4173 4174 4175 4176 4177 4178 4179 4180 4181 4182 4183 4184 4185 4186 4187 4188
{
	struct xdr_stream xdr;
	struct compound_hdr hdr;
	int status;

	xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
	status = decode_compound_hdr(&xdr, &hdr);
	if (status)
		goto out;
	status = decode_putfh(&xdr);
	if (status)
		goto out;
	status = decode_readdir(&xdr, rqstp, res);
out:
	return status;
}

/*
 * Decode Read response
 */
A
Al Viro 已提交
4189
static int nfs4_xdr_dec_read(struct rpc_rqst *rqstp, __be32 *p, struct nfs_readres *res)
L
Linus Torvalds 已提交
4190 4191 4192 4193 4194 4195 4196 4197 4198 4199 4200 4201 4202 4203 4204 4205 4206 4207 4208 4209 4210 4211
{
	struct xdr_stream xdr;
	struct compound_hdr hdr;
	int status;

	xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
	status = decode_compound_hdr(&xdr, &hdr);
	if (status)
		goto out;
	status = decode_putfh(&xdr);
	if (status)
		goto out;
	status = decode_read(&xdr, rqstp, res);
	if (!status)
		status = res->count;
out:
	return status;
}

/*
 * Decode WRITE response
 */
A
Al Viro 已提交
4212
static int nfs4_xdr_dec_write(struct rpc_rqst *rqstp, __be32 *p, struct nfs_writeres *res)
L
Linus Torvalds 已提交
4213 4214 4215 4216 4217 4218 4219 4220 4221 4222 4223 4224 4225
{
	struct xdr_stream xdr;
	struct compound_hdr hdr;
	int status;

	xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
	status = decode_compound_hdr(&xdr, &hdr);
	if (status)
		goto out;
	status = decode_putfh(&xdr);
	if (status)
		goto out;
	status = decode_write(&xdr, res);
4226 4227 4228
	if (status)
		goto out;
	decode_getfattr(&xdr, res->fattr, res->server);
L
Linus Torvalds 已提交
4229 4230 4231 4232 4233 4234 4235 4236 4237
	if (!status)
		status = res->count;
out:
	return status;
}

/*
 * Decode COMMIT response
 */
A
Al Viro 已提交
4238
static int nfs4_xdr_dec_commit(struct rpc_rqst *rqstp, __be32 *p, struct nfs_writeres *res)
L
Linus Torvalds 已提交
4239 4240 4241 4242 4243 4244 4245 4246 4247 4248 4249 4250 4251
{
	struct xdr_stream xdr;
	struct compound_hdr hdr;
	int status;

	xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
	status = decode_compound_hdr(&xdr, &hdr);
	if (status)
		goto out;
	status = decode_putfh(&xdr);
	if (status)
		goto out;
	status = decode_commit(&xdr, res);
4252 4253 4254
	if (status)
		goto out;
	decode_getfattr(&xdr, res->fattr, res->server);
L
Linus Torvalds 已提交
4255 4256 4257 4258 4259 4260 4261
out:
	return status;
}

/*
 * FSINFO request
 */
A
Al Viro 已提交
4262
static int nfs4_xdr_dec_fsinfo(struct rpc_rqst *req, __be32 *p, struct nfs_fsinfo *fsinfo)
L
Linus Torvalds 已提交
4263 4264 4265 4266 4267 4268 4269 4270 4271 4272 4273 4274 4275 4276 4277 4278 4279
{
	struct xdr_stream xdr;
	struct compound_hdr hdr;
	int status;

	xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
	status = decode_compound_hdr(&xdr, &hdr);
	if (!status)
		status = decode_putfh(&xdr);
	if (!status)
		status = decode_fsinfo(&xdr, fsinfo);
	return status;
}

/*
 * PATHCONF request
 */
A
Al Viro 已提交
4280
static int nfs4_xdr_dec_pathconf(struct rpc_rqst *req, __be32 *p, struct nfs_pathconf *pathconf)
L
Linus Torvalds 已提交
4281 4282 4283 4284 4285 4286 4287 4288 4289 4290 4291 4292 4293 4294 4295 4296 4297
{
	struct xdr_stream xdr;
	struct compound_hdr hdr;
	int status;

	xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
	status = decode_compound_hdr(&xdr, &hdr);
	if (!status)
		status = decode_putfh(&xdr);
	if (!status)
		status = decode_pathconf(&xdr, pathconf);
	return status;
}

/*
 * STATFS request
 */
A
Al Viro 已提交
4298
static int nfs4_xdr_dec_statfs(struct rpc_rqst *req, __be32 *p, struct nfs_fsstat *fsstat)
L
Linus Torvalds 已提交
4299 4300 4301 4302 4303 4304 4305 4306 4307 4308 4309 4310 4311 4312 4313 4314 4315
{
	struct xdr_stream xdr;
	struct compound_hdr hdr;
	int status;

	xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
	status = decode_compound_hdr(&xdr, &hdr);
	if (!status)
		status = decode_putfh(&xdr);
	if (!status)
		status = decode_statfs(&xdr, fsstat);
	return status;
}

/*
 * GETATTR_BITMAP request
 */
A
Al Viro 已提交
4316
static int nfs4_xdr_dec_server_caps(struct rpc_rqst *req, __be32 *p, struct nfs4_server_caps_res *res)
L
Linus Torvalds 已提交
4317 4318 4319 4320 4321 4322 4323 4324 4325 4326 4327 4328 4329 4330 4331 4332 4333 4334
{
	struct xdr_stream xdr;
	struct compound_hdr hdr;
	int status;

	xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
	if ((status = decode_compound_hdr(&xdr, &hdr)) != 0)
		goto out;
	if ((status = decode_putfh(&xdr)) != 0)
		goto out;
	status = decode_server_caps(&xdr, res);
out:
	return status;
}

/*
 * Decode RENEW response
 */
A
Al Viro 已提交
4335
static int nfs4_xdr_dec_renew(struct rpc_rqst *rqstp, __be32 *p, void *dummy)
L
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{
	struct xdr_stream xdr;
	struct compound_hdr hdr;
	int status;

	xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
	status = decode_compound_hdr(&xdr, &hdr);
	if (!status)
		status = decode_renew(&xdr);
	return status;
}

/*
 * a SETCLIENTID request
 */
A
Al Viro 已提交
4351
static int nfs4_xdr_dec_setclientid(struct rpc_rqst *req, __be32 *p,
4352
		struct nfs_client *clp)
L
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{
	struct xdr_stream xdr;
	struct compound_hdr hdr;
	int status;

	xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
	status = decode_compound_hdr(&xdr, &hdr);
	if (!status)
		status = decode_setclientid(&xdr, clp);
	return status;
}

/*
 * a SETCLIENTID_CONFIRM request
 */
A
Al Viro 已提交
4368
static int nfs4_xdr_dec_setclientid_confirm(struct rpc_rqst *req, __be32 *p, struct nfs_fsinfo *fsinfo)
L
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{
	struct xdr_stream xdr;
	struct compound_hdr hdr;
	int status;

	xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
	status = decode_compound_hdr(&xdr, &hdr);
	if (!status)
		status = decode_setclientid_confirm(&xdr);
	if (!status)
		status = decode_putrootfh(&xdr);
	if (!status)
		status = decode_fsinfo(&xdr, fsinfo);
	return status;
}

/*
 * DELEGRETURN request
 */
A
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static int nfs4_xdr_dec_delegreturn(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_delegreturnres *res)
L
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{
	struct xdr_stream xdr;
	struct compound_hdr hdr;
	int status;

	xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
	status = decode_compound_hdr(&xdr, &hdr);
4396 4397 4398 4399 4400 4401 4402 4403
	if (status != 0)
		goto out;
	status = decode_putfh(&xdr);
	if (status != 0)
		goto out;
	status = decode_delegreturn(&xdr);
	decode_getfattr(&xdr, res->fattr, res->server);
out:
L
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	return status;
}

4407 4408 4409
/*
 * FS_LOCATIONS request
 */
A
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static int nfs4_xdr_dec_fs_locations(struct rpc_rqst *req, __be32 *p, struct nfs4_fs_locations *res)
4411 4412 4413 4414 4415 4416 4417 4418 4419 4420 4421 4422 4423 4424 4425 4426 4427 4428 4429
{
	struct xdr_stream xdr;
	struct compound_hdr hdr;
	int status;

	xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
	status = decode_compound_hdr(&xdr, &hdr);
	if (status != 0)
		goto out;
	if ((status = decode_putfh(&xdr)) != 0)
		goto out;
	if ((status = decode_lookup(&xdr)) != 0)
		goto out;
	xdr_enter_page(&xdr, PAGE_SIZE);
	status = decode_getfattr(&xdr, &res->fattr, res->server);
out:
	return status;
}

4430
__be32 *nfs4_decode_dirent(__be32 *p, struct nfs_entry *entry, int plus)
L
Linus Torvalds 已提交
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{
	uint32_t bitmap[2] = {0};
	uint32_t len;

	if (!*p++) {
		if (!*p)
			return ERR_PTR(-EAGAIN);
		entry->eof = 1;
		return ERR_PTR(-EBADCOOKIE);
	}

	entry->prev_cookie = entry->cookie;
	p = xdr_decode_hyper(p, &entry->cookie);
	entry->len = ntohl(*p++);
	entry->name = (const char *) p;
	p += XDR_QUADLEN(entry->len);

	/*
	 * 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;

	len = ntohl(*p++);		/* bitmap length */
	if (len-- > 0) {
		bitmap[0] = ntohl(*p++);
		if (len-- > 0) {
			bitmap[1] = ntohl(*p++);
			p += len;
		}
	}
	len = XDR_QUADLEN(ntohl(*p++));	/* attribute buffer length */
	if (len > 0) {
4465 4466 4467 4468 4469 4470
		if (bitmap[0] & FATTR4_WORD0_RDATTR_ERROR) {
			bitmap[0] &= ~FATTR4_WORD0_RDATTR_ERROR;
			/* Ignore the return value of rdattr_error for now */
			p++;
			len--;
		}
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		if (bitmap[0] == 0 && bitmap[1] == FATTR4_WORD1_MOUNTED_ON_FILEID)
			xdr_decode_hyper(p, &entry->ino);
		else if (bitmap[0] == FATTR4_WORD0_FILEID)
			xdr_decode_hyper(p, &entry->ino);
		p += len;
	}

	entry->eof = !p[0] && p[1];
	return p;
}

/*
 * 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		},
4491 4492 4493 4494 4495 4496 4497 4498 4499 4500 4501 4502 4503 4504 4505 4506 4507 4508 4509 4510 4511 4512 4513 4514 4515 4516 4517 4518 4519 4520 4521 4522
	{ 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_BADOWNER,	-EINVAL		},
	{ NFS4ERR_BADNAME,	-EINVAL		},
	{ NFS4ERR_BAD_COOKIE,	-EBADCOOKIE	},
	{ NFS4ERR_NOTSUPP,	-ENOTSUPP	},
	{ NFS4ERR_TOOSMALL,	-ETOOSMALL	},
	{ NFS4ERR_SERVERFAULT,	-ESERVERFAULT	},
	{ NFS4ERR_BADTYPE,	-EBADTYPE	},
	{ NFS4ERR_LOCKED,	-EAGAIN		},
	{ NFS4ERR_RESOURCE,	-EREMOTEIO	},
	{ NFS4ERR_SYMLINK,	-ELOOP		},
	{ NFS4ERR_OP_ILLEGAL,	-EOPNOTSUPP	},
	{ NFS4ERR_DEADLOCK,	-EDEADLK	},
	{ NFS4ERR_WRONGSEC,	-EPERM		}, /* FIXME: this needs
L
Linus Torvalds 已提交
4523 4524 4525
						    * to be handled by a
						    * middle-layer.
						    */
4526
	{ -1,			-EIO		}
L
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4527 4528 4529 4530 4531 4532 4533
};

/*
 * Convert an NFS error code to a local one.
 * This one is used jointly by NFSv2 and NFSv3.
 */
static int
4534
nfs4_stat_to_errno(int stat)
L
Linus Torvalds 已提交
4535 4536 4537 4538 4539 4540 4541 4542
{
	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. */
4543
		return -ESERVERFAULT;
L
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4544 4545 4546 4547 4548 4549
	}
	/* 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.
	 */
4550
	return -stat;
L
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4551 4552 4553 4554 4555 4556 4557
}

#define PROC(proc, argtype, restype)				\
[NFSPROC4_CLNT_##proc] = {					\
	.p_proc   = NFSPROC4_COMPOUND,				\
	.p_encode = (kxdrproc_t) nfs4_xdr_##argtype,		\
	.p_decode = (kxdrproc_t) nfs4_xdr_##restype,		\
4558 4559
	.p_arglen = NFS4_##argtype##_sz,			\
	.p_replen = NFS4_##restype##_sz,			\
4560 4561
	.p_statidx = NFSPROC4_CLNT_##proc,			\
	.p_name   = #proc,					\
A
Andy Adamson 已提交
4562
}
L
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4563 4564 4565 4566 4567 4568 4569 4570 4571 4572 4573 4574 4575 4576 4577 4578 4579 4580 4581 4582 4583 4584 4585 4586 4587 4588 4589 4590 4591 4592 4593 4594 4595

struct rpc_procinfo	nfs4_procedures[] = {
  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),
4596
  PROC(GETACL,		enc_getacl,	dec_getacl),
4597
  PROC(SETACL,		enc_setacl,	dec_setacl),
4598
  PROC(FS_LOCATIONS,	enc_fs_locations, dec_fs_locations),
L
Linus Torvalds 已提交
4599 4600 4601 4602
};

struct rpc_version		nfs_version4 = {
	.number			= 4,
4603
	.nrprocs		= ARRAY_SIZE(nfs4_procedures),
L
Linus Torvalds 已提交
4604 4605 4606 4607 4608 4609 4610 4611
	.procs			= nfs4_procedures
};

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