nfs4xdr.c 118.7 KB
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/*
 *  fs/nfs/nfs4xdr.c
 *
 *  Client-side XDR for NFSv4.
 *
 *  Copyright (c) 2002 The Regents of the University of Michigan.
 *  All rights reserved.
 *
 *  Kendrick Smith <kmsmith@umich.edu>
 *  Andy Adamson   <andros@umich.edu>
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 *
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 *  Redistribution and use in source and binary forms, with or without
 *  modification, are permitted provided that the following conditions
 *  are met:
 *
 *  1. Redistributions of source code must retain the above copyright
 *     notice, this list of conditions and the following disclaimer.
 *  2. Redistributions in binary form must reproduce the above copyright
 *     notice, this list of conditions and the following disclaimer in the
 *     documentation and/or other materials provided with the distribution.
 *  3. Neither the name of the University nor the names of its
 *     contributors may be used to endorse or promote products derived
 *     from this software without specific prior written permission.
 *
 *  THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
 *  WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
 *  MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 *  DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
 *  FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 *  CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 *  SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
 *  BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
 *  LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
 *  NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 *  SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

#include <linux/param.h>
#include <linux/time.h>
#include <linux/mm.h>
#include <linux/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 + \
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				decode_lookup_maxsz + \
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				decode_getattr_maxsz + \
				decode_getfh_maxsz)
#define NFS4_enc_lookup_root_sz (compound_encode_hdr_maxsz + \
				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 + \
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				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 + \
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				encode_getfh_maxsz + \
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				encode_getattr_maxsz + \
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				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 + \
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				encode_putfh_maxsz + \
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				encode_getattr_maxsz)
#define NFS4_dec_server_caps_sz (compound_decode_hdr_maxsz + \
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				decode_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 struct {
	unsigned int	mode;
	unsigned int	nfs2type;
} nfs_type2fmt[] = {
	{ 0,		NFNON	     },
	{ S_IFREG,	NFREG	     },
	{ S_IFDIR,	NFDIR	     },
	{ S_IFBLK,	NFBLK	     },
	{ S_IFCHR,	NFCHR	     },
	{ S_IFLNK,	NFLNK	     },
	{ S_IFSOCK,	NFSOCK	     },
	{ S_IFIFO,	NFFIFO	     },
	{ 0,		NFNON	     },
	{ 0,		NFNON	     },
};

struct compound_hdr {
	int32_t		status;
	uint32_t	nops;
	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);
}

static int encode_compound_hdr(struct xdr_stream *xdr, struct compound_hdr *hdr)
{
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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);
	WRITE32(hdr->nops);
	return 0;
}

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);
}

static int encode_attrs(struct xdr_stream *xdr, const struct iattr *iap, const struct nfs_server *server)
{
	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;
	int status;

	/*
	 * 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);

	status = 0;
/* out: */
	return status;
}

static int encode_access(struct xdr_stream *xdr, u32 access)
{
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	__be32 *p;
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	RESERVE_SPACE(8);
	WRITE32(OP_ACCESS);
	WRITE32(access);
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	return 0;
}

static int encode_close(struct xdr_stream *xdr, const struct nfs_closeargs *arg)
{
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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);
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	WRITEMEM(arg->stateid->data, NFS4_STATEID_SIZE);
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	return 0;
}

static int encode_commit(struct xdr_stream *xdr, const struct nfs_writeargs *args)
{
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	__be32 *p;
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        RESERVE_SPACE(16);
        WRITE32(OP_COMMIT);
        WRITE64(args->offset);
        WRITE32(args->count);

        return 0;
}

static int encode_create(struct xdr_stream *xdr, const struct nfs4_create_arg *create)
{
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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);

	return encode_attrs(xdr, create->attrs, create->server);
}

static int encode_getattr_one(struct xdr_stream *xdr, uint32_t bitmap)
{
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        __be32 *p;
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        RESERVE_SPACE(12);
        WRITE32(OP_GETATTR);
        WRITE32(1);
        WRITE32(bitmap);
        return 0;
}

static int encode_getattr_two(struct xdr_stream *xdr, uint32_t bm0, uint32_t bm1)
{
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        __be32 *p;
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        RESERVE_SPACE(16);
        WRITE32(OP_GETATTR);
        WRITE32(2);
        WRITE32(bm0);
        WRITE32(bm1);
        return 0;
}

static int encode_getfattr(struct xdr_stream *xdr, const u32* bitmask)
{
	return encode_getattr_two(xdr,
			bitmask[0] & nfs4_fattr_bitmap[0],
			bitmask[1] & nfs4_fattr_bitmap[1]);
}

static int encode_fsinfo(struct xdr_stream *xdr, const u32* bitmask)
{
	return encode_getattr_two(xdr, bitmask[0] & nfs4_fsinfo_bitmap[0],
			bitmask[1] & nfs4_fsinfo_bitmap[1]);
}

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static int encode_fs_locations(struct xdr_stream *xdr, const u32* bitmask)
{
	return encode_getattr_two(xdr,
				  bitmask[0] & nfs4_fs_locations_bitmap[0],
				  bitmask[1] & nfs4_fs_locations_bitmap[1]);
}

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static int encode_getfh(struct xdr_stream *xdr)
{
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	__be32 *p;
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	RESERVE_SPACE(4);
	WRITE32(OP_GETFH);

	return 0;
}

static int encode_link(struct xdr_stream *xdr, const struct qstr *name)
{
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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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	return 0;
}

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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
 */
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static int encode_lock(struct xdr_stream *xdr, const struct nfs_lock_args *args)
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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){
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		RESERVE_SPACE(4+NFS4_STATEID_SIZE+32);
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		WRITE32(args->open_seqid->sequence->counter);
895
		WRITEMEM(args->open_stateid->data, NFS4_STATEID_SIZE);
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		WRITE32(args->lock_seqid->sequence->counter);
		WRITE64(args->lock_owner.clientid);
898 899 900
		WRITE32(16);
		WRITEMEM("lock id:", 8);
		WRITE64(args->lock_owner.id);
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	}
	else {
903 904
		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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	}

	return 0;
}

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static int encode_lockt(struct xdr_stream *xdr, const struct nfs_lockt_args *args)
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{
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	__be32 *p;
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915
	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);
921 922 923
	WRITE32(16);
	WRITEMEM("lock id:", 8);
	WRITE64(args->lock_owner.id);
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	return 0;
}

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static int encode_locku(struct xdr_stream *xdr, const struct nfs_locku_args *args)
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{
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	__be32 *p;
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932
	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);
936
	WRITEMEM(args->stateid->data, NFS4_STATEID_SIZE);
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	WRITE64(args->fl->fl_start);
	WRITE64(nfs4_lock_length(args->fl));
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	return 0;
}

static int encode_lookup(struct xdr_stream *xdr, const struct qstr *name)
{
	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);

	return 0;
}

956
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);
961
	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:
972
			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);
986
	WRITE32(arg->seqid->sequence->counter);
987
	encode_share_access(xdr, arg->fmode);
988
	RESERVE_SPACE(28);
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	WRITE64(arg->clientid);
990 991 992
	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) {
		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);
	}
}

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) {
		case 0:
			WRITE32(NFS4_OPEN_NOCREATE);
			break;
		default:
			BUG_ON(arg->claim != NFS4_OPEN_CLAIM_NULL);
			WRITE32(NFS4_OPEN_CREATE);
			encode_createmode(xdr, arg);
	}
}

1027
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) {
		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();
	}
}

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);
}

1056
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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1069
	RESERVE_SPACE(4+NFS4_STATEID_SIZE);
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	WRITE32(NFS4_OPEN_CLAIM_DELEGATE_CUR);
1071
	WRITEMEM(stateid->data, NFS4_STATEID_SIZE);
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	encode_string(xdr, name->len, name->name);
}

static int encode_open(struct xdr_stream *xdr, const struct nfs_openargs *arg)
{
	encode_openhdr(xdr, arg);
	encode_opentype(xdr, arg);
	switch (arg->claim) {
		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();
	}
	return 0;
}

static int encode_open_confirm(struct xdr_stream *xdr, const struct nfs_open_confirmargs *arg)
{
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	__be32 *p;
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1099
	RESERVE_SPACE(4+NFS4_STATEID_SIZE+4);
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	WRITE32(OP_OPEN_CONFIRM);
1101
	WRITEMEM(arg->stateid->data, NFS4_STATEID_SIZE);
1102
	WRITE32(arg->seqid->sequence->counter);
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	return 0;
}

static int encode_open_downgrade(struct xdr_stream *xdr, const struct nfs_closeargs *arg)
{
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	__be32 *p;
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1110

1111
	RESERVE_SPACE(4+NFS4_STATEID_SIZE+4);
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1112
	WRITE32(OP_OPEN_DOWNGRADE);
1113
	WRITEMEM(arg->stateid->data, NFS4_STATEID_SIZE);
1114
	WRITE32(arg->seqid->sequence->counter);
1115
	encode_share_access(xdr, arg->fmode);
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	return 0;
}

static int
encode_putfh(struct xdr_stream *xdr, const struct nfs_fh *fh)
{
	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);

	return 0;
}

static int encode_putrootfh(struct xdr_stream *xdr)
{
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        __be32 *p;
1136

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        RESERVE_SPACE(4);
        WRITE32(OP_PUTROOTFH);

        return 0;
}

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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1147

1148
	RESERVE_SPACE(NFS4_STATEID_SIZE);
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	if (ctx->state != NULL) {
		nfs4_copy_stateid(&stateid, ctx->state, ctx->lockowner);
1151
		WRITEMEM(stateid.data, NFS4_STATEID_SIZE);
L
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1152
	} else
1153
		WRITEMEM(zero_stateid.data, NFS4_STATEID_SIZE);
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1154 1155 1156 1157
}

static int encode_read(struct xdr_stream *xdr, const struct nfs_readargs *args)
{
A
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	__be32 *p;
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1159 1160 1161 1162 1163 1164 1165 1166 1167 1168 1169 1170 1171 1172 1173

	RESERVE_SPACE(4);
	WRITE32(OP_READ);

	encode_stateid(xdr, args->context);

	RESERVE_SPACE(12);
	WRITE64(args->offset);
	WRITE32(args->count);

	return 0;
}

static int encode_readdir(struct xdr_stream *xdr, const struct nfs4_readdir_arg *readdir, struct rpc_rqst *req)
{
1174 1175 1176 1177
	uint32_t attrs[2] = {
		FATTR4_WORD0_RDATTR_ERROR|FATTR4_WORD0_FILEID,
		FATTR4_WORD1_MOUNTED_ON_FILEID,
	};
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	__be32 *p;
L
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1179

1180
	RESERVE_SPACE(12+NFS4_VERIFIER_SIZE+20);
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	WRITE32(OP_READDIR);
	WRITE64(readdir->cookie);
1183
	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);
1187 1188 1189 1190 1191 1192 1193
	/* 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]);
1194 1195
	dprintk("%s: cookie = %Lu, verifier = %08x:%08x, bitmap = %08x:%08x\n",
			__func__,
1196 1197 1198 1199 1200
			(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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	return 0;
}

static int encode_readlink(struct xdr_stream *xdr, const struct nfs4_readlink *readlink, struct rpc_rqst *req)
{
A
Al Viro 已提交
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	__be32 *p;
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	RESERVE_SPACE(4);
	WRITE32(OP_READLINK);

	return 0;
}

static int encode_remove(struct xdr_stream *xdr, const struct qstr *name)
{
A
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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);

	return 0;
}

static int encode_rename(struct xdr_stream *xdr, const struct qstr *oldname, const struct qstr *newname)
{
A
Al Viro 已提交
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	__be32 *p;
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1230 1231 1232 1233 1234

	RESERVE_SPACE(8 + oldname->len);
	WRITE32(OP_RENAME);
	WRITE32(oldname->len);
	WRITEMEM(oldname->name, oldname->len);
1235

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1236 1237 1238 1239 1240 1241 1242
	RESERVE_SPACE(4 + newname->len);
	WRITE32(newname->len);
	WRITEMEM(newname->name, newname->len);

	return 0;
}

1243
static int encode_renew(struct xdr_stream *xdr, const struct nfs_client *client_stateid)
L
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{
A
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	__be32 *p;
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1246 1247 1248 1249 1250 1251 1252 1253

	RESERVE_SPACE(12);
	WRITE32(OP_RENEW);
	WRITE64(client_stateid->cl_clientid);

	return 0;
}

1254 1255 1256
static int
encode_restorefh(struct xdr_stream *xdr)
{
A
Al Viro 已提交
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	__be32 *p;
1258 1259 1260 1261 1262 1263 1264

	RESERVE_SPACE(4);
	WRITE32(OP_RESTOREFH);

	return 0;
}

1265 1266 1267
static int
encode_setacl(struct xdr_stream *xdr, struct nfs_setaclargs *arg)
{
A
Al Viro 已提交
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	__be32 *p;
1269

1270
	RESERVE_SPACE(4+NFS4_STATEID_SIZE);
1271
	WRITE32(OP_SETATTR);
1272
	WRITEMEM(zero_stateid.data, NFS4_STATEID_SIZE);
1273 1274 1275 1276 1277 1278 1279 1280 1281 1282 1283
	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);
	return 0;
}

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static int
encode_savefh(struct xdr_stream *xdr)
{
A
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	__be32 *p;
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	RESERVE_SPACE(4);
	WRITE32(OP_SAVEFH);

	return 0;
}

static int encode_setattr(struct xdr_stream *xdr, const struct nfs_setattrargs *arg, const struct nfs_server *server)
{
	int status;
A
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	__be32 *p;
1299

1300
        RESERVE_SPACE(4+NFS4_STATEID_SIZE);
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        WRITE32(OP_SETATTR);
1302
	WRITEMEM(arg->stateid.data, NFS4_STATEID_SIZE);
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        if ((status = encode_attrs(xdr, arg->iap, server)))
		return status;

        return 0;
}

static int encode_setclientid(struct xdr_stream *xdr, const struct nfs4_setclientid *setclientid)
{
A
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	__be32 *p;
L
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1313

1314
	RESERVE_SPACE(4 + NFS4_VERIFIER_SIZE);
L
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1315
	WRITE32(OP_SETCLIENTID);
1316
	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);

	return 0;
}

1329
static int encode_setclientid_confirm(struct xdr_stream *xdr, const struct nfs_client *client_state)
L
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{
A
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        __be32 *p;
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1332

1333
        RESERVE_SPACE(12 + NFS4_VERIFIER_SIZE);
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        WRITE32(OP_SETCLIENTID_CONFIRM);
        WRITE64(client_state->cl_clientid);
1336
        WRITEMEM(client_state->cl_confirm.data, NFS4_VERIFIER_SIZE);
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        return 0;
}

static int encode_write(struct xdr_stream *xdr, const struct nfs_writeargs *args)
{
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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);

	return 0;
}

static int encode_delegreturn(struct xdr_stream *xdr, const nfs4_stateid *stateid)
{
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	__be32 *p;
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1364
	RESERVE_SPACE(4+NFS4_STATEID_SIZE);
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	WRITE32(OP_DELEGRETURN);
1367
	WRITEMEM(stateid->data, NFS4_STATEID_SIZE);
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	return 0;

}
/*
 * 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 = {
1382
		.nops = 3,
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	};
	int status;

	xdr_init_encode(&xdr, &req->rq_snd_buf, p);
	encode_compound_hdr(&xdr, &hdr);
1388 1389 1390 1391 1392 1393 1394 1395
	status = encode_putfh(&xdr, args->fh);
	if (status != 0)
		goto out;
	status = encode_access(&xdr, args->access);
	if (status != 0)
		goto out;
	status = encode_getfattr(&xdr, args->bitmask);
out:
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	return status;
}

/*
 * 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 = {
		.nops = 4,
	};
	int status;

	xdr_init_encode(&xdr, &req->rq_snd_buf, p);
	encode_compound_hdr(&xdr, &hdr);
	if ((status = encode_putfh(&xdr, args->dir_fh)) != 0)
		goto out;
	if ((status = encode_lookup(&xdr, args->name)) != 0)
		goto out;
	if ((status = encode_getfh(&xdr)) != 0)
		goto out;
	status = encode_getfattr(&xdr, args->bitmask);
out:
	return status;
}

/*
 * Encode LOOKUP_ROOT request
 */
A
Al Viro 已提交
1426
static int nfs4_xdr_enc_lookup_root(struct rpc_rqst *req, __be32 *p, const struct nfs4_lookup_root_arg *args)
L
Linus Torvalds 已提交
1427 1428 1429 1430 1431 1432 1433 1434 1435 1436 1437 1438 1439 1440 1441 1442 1443 1444 1445 1446
{
	struct xdr_stream xdr;
	struct compound_hdr hdr = {
		.nops = 3,
	};
	int status;

	xdr_init_encode(&xdr, &req->rq_snd_buf, p);
	encode_compound_hdr(&xdr, &hdr);
	if ((status = encode_putrootfh(&xdr)) != 0)
		goto out;
	if ((status = encode_getfh(&xdr)) == 0)
		status = encode_getfattr(&xdr, args->bitmask);
out:
	return status;
}

/*
 * Encode REMOVE request
 */
1447
static int nfs4_xdr_enc_remove(struct rpc_rqst *req, __be32 *p, const struct nfs_removeargs *args)
L
Linus Torvalds 已提交
1448 1449 1450
{
	struct xdr_stream xdr;
	struct compound_hdr hdr = {
1451
		.nops = 3,
L
Linus Torvalds 已提交
1452 1453 1454 1455 1456
	};
	int status;

	xdr_init_encode(&xdr, &req->rq_snd_buf, p);
	encode_compound_hdr(&xdr, &hdr);
1457 1458
	if ((status = encode_putfh(&xdr, args->fh)) != 0)
		goto out;
1459
	if ((status = encode_remove(&xdr, &args->name)) != 0)
1460 1461 1462
		goto out;
	status = encode_getfattr(&xdr, args->bitmask);
out:
L
Linus Torvalds 已提交
1463 1464 1465 1466 1467 1468
	return status;
}

/*
 * Encode RENAME request
 */
A
Al Viro 已提交
1469
static int nfs4_xdr_enc_rename(struct rpc_rqst *req, __be32 *p, const struct nfs4_rename_arg *args)
L
Linus Torvalds 已提交
1470 1471 1472
{
	struct xdr_stream xdr;
	struct compound_hdr hdr = {
1473
		.nops = 7,
L
Linus Torvalds 已提交
1474 1475 1476 1477 1478 1479 1480 1481 1482 1483 1484
	};
	int status;

	xdr_init_encode(&xdr, &req->rq_snd_buf, p);
	encode_compound_hdr(&xdr, &hdr);
	if ((status = encode_putfh(&xdr, args->old_dir)) != 0)
		goto out;
	if ((status = encode_savefh(&xdr)) != 0)
		goto out;
	if ((status = encode_putfh(&xdr, args->new_dir)) != 0)
		goto out;
1485 1486 1487 1488 1489 1490 1491
	if ((status = encode_rename(&xdr, args->old_name, args->new_name)) != 0)
		goto out;
	if ((status = encode_getfattr(&xdr, args->bitmask)) != 0)
		goto out;
	if ((status = encode_restorefh(&xdr)) != 0)
		goto out;
	status = encode_getfattr(&xdr, args->bitmask);
L
Linus Torvalds 已提交
1492 1493 1494 1495 1496 1497 1498
out:
	return status;
}

/*
 * Encode LINK request
 */
A
Al Viro 已提交
1499
static int nfs4_xdr_enc_link(struct rpc_rqst *req, __be32 *p, const struct nfs4_link_arg *args)
L
Linus Torvalds 已提交
1500 1501 1502
{
	struct xdr_stream xdr;
	struct compound_hdr hdr = {
1503
		.nops = 7,
L
Linus Torvalds 已提交
1504 1505 1506 1507 1508 1509 1510 1511 1512 1513 1514
	};
	int status;

	xdr_init_encode(&xdr, &req->rq_snd_buf, p);
	encode_compound_hdr(&xdr, &hdr);
	if ((status = encode_putfh(&xdr, args->fh)) != 0)
		goto out;
	if ((status = encode_savefh(&xdr)) != 0)
		goto out;
	if ((status = encode_putfh(&xdr, args->dir_fh)) != 0)
		goto out;
1515 1516 1517 1518 1519 1520 1521
	if ((status = encode_link(&xdr, args->name)) != 0)
		goto out;
	if ((status = encode_getfattr(&xdr, args->bitmask)) != 0)
		goto out;
	if ((status = encode_restorefh(&xdr)) != 0)
		goto out;
	status = encode_getfattr(&xdr, args->bitmask);
L
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1522 1523 1524 1525 1526 1527 1528
out:
	return status;
}

/*
 * Encode CREATE request
 */
A
Al Viro 已提交
1529
static int nfs4_xdr_enc_create(struct rpc_rqst *req, __be32 *p, const struct nfs4_create_arg *args)
L
Linus Torvalds 已提交
1530 1531 1532
{
	struct xdr_stream xdr;
	struct compound_hdr hdr = {
1533
		.nops = 7,
L
Linus Torvalds 已提交
1534 1535 1536 1537 1538 1539 1540
	};
	int status;

	xdr_init_encode(&xdr, &req->rq_snd_buf, p);
	encode_compound_hdr(&xdr, &hdr);
	if ((status = encode_putfh(&xdr, args->dir_fh)) != 0)
		goto out;
1541 1542
	if ((status = encode_savefh(&xdr)) != 0)
		goto out;
L
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1543 1544 1545 1546
	if ((status = encode_create(&xdr, args)) != 0)
		goto out;
	if ((status = encode_getfh(&xdr)) != 0)
		goto out;
1547 1548 1549 1550
	if ((status = encode_getfattr(&xdr, args->bitmask)) != 0)
		goto out;
	if ((status = encode_restorefh(&xdr)) != 0)
		goto out;
L
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1551 1552 1553 1554 1555 1556 1557 1558
	status = encode_getfattr(&xdr, args->bitmask);
out:
	return status;
}

/*
 * Encode SYMLINK request
 */
A
Al Viro 已提交
1559
static int nfs4_xdr_enc_symlink(struct rpc_rqst *req, __be32 *p, const struct nfs4_create_arg *args)
L
Linus Torvalds 已提交
1560 1561 1562 1563 1564 1565 1566
{
	return nfs4_xdr_enc_create(req, p, args);
}

/*
 * Encode GETATTR request
 */
A
Al Viro 已提交
1567
static int nfs4_xdr_enc_getattr(struct rpc_rqst *req, __be32 *p, const struct nfs4_getattr_arg *args)
L
Linus Torvalds 已提交
1568 1569 1570 1571 1572 1573 1574 1575 1576 1577 1578 1579 1580 1581 1582 1583 1584
{
	struct xdr_stream xdr;
	struct compound_hdr hdr = {
		.nops = 2,
	};
	int status;

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

/*
 * Encode a CLOSE request
 */
A
Al Viro 已提交
1585
static int nfs4_xdr_enc_close(struct rpc_rqst *req, __be32 *p, struct nfs_closeargs *args)
L
Linus Torvalds 已提交
1586 1587 1588
{
        struct xdr_stream xdr;
        struct compound_hdr hdr = {
1589
                .nops   = 3,
L
Linus Torvalds 已提交
1590 1591 1592 1593 1594 1595 1596 1597 1598
        };
        int status;

        xdr_init_encode(&xdr, &req->rq_snd_buf, p);
        encode_compound_hdr(&xdr, &hdr);
        status = encode_putfh(&xdr, args->fh);
        if(status)
                goto out;
        status = encode_close(&xdr, args);
1599 1600 1601
	if (status != 0)
		goto out;
	status = encode_getfattr(&xdr, args->bitmask);
L
Linus Torvalds 已提交
1602 1603 1604 1605 1606 1607 1608
out:
        return status;
}

/*
 * Encode an OPEN request
 */
A
Al Viro 已提交
1609
static int nfs4_xdr_enc_open(struct rpc_rqst *req, __be32 *p, struct nfs_openargs *args)
L
Linus Torvalds 已提交
1610 1611 1612
{
	struct xdr_stream xdr;
	struct compound_hdr hdr = {
1613
		.nops = 7,
L
Linus Torvalds 已提交
1614 1615 1616 1617 1618 1619
	};
	int status;

	xdr_init_encode(&xdr, &req->rq_snd_buf, p);
	encode_compound_hdr(&xdr, &hdr);
	status = encode_putfh(&xdr, args->fh);
1620 1621 1622
	if (status)
		goto out;
	status = encode_savefh(&xdr);
L
Linus Torvalds 已提交
1623 1624 1625 1626 1627 1628 1629 1630 1631
	if (status)
		goto out;
	status = encode_open(&xdr, args);
	if (status)
		goto out;
	status = encode_getfh(&xdr);
	if (status)
		goto out;
	status = encode_getfattr(&xdr, args->bitmask);
1632 1633 1634 1635 1636 1637
	if (status)
		goto out;
	status = encode_restorefh(&xdr);
	if (status)
		goto out;
	status = encode_getfattr(&xdr, args->bitmask);
L
Linus Torvalds 已提交
1638 1639 1640 1641 1642 1643 1644
out:
	return status;
}

/*
 * Encode an OPEN_CONFIRM request
 */
A
Al Viro 已提交
1645
static int nfs4_xdr_enc_open_confirm(struct rpc_rqst *req, __be32 *p, struct nfs_open_confirmargs *args)
L
Linus Torvalds 已提交
1646 1647 1648 1649 1650 1651 1652 1653 1654 1655 1656 1657 1658 1659 1660 1661 1662 1663 1664 1665
{
	struct xdr_stream xdr;
	struct compound_hdr hdr = {
		.nops   = 2,
	};
	int status;

	xdr_init_encode(&xdr, &req->rq_snd_buf, p);
	encode_compound_hdr(&xdr, &hdr);
	status = encode_putfh(&xdr, args->fh);
	if(status)
		goto out;
	status = encode_open_confirm(&xdr, args);
out:
	return status;
}

/*
 * Encode an OPEN request with no attributes.
 */
A
Al Viro 已提交
1666
static int nfs4_xdr_enc_open_noattr(struct rpc_rqst *req, __be32 *p, struct nfs_openargs *args)
L
Linus Torvalds 已提交
1667 1668 1669
{
	struct xdr_stream xdr;
	struct compound_hdr hdr = {
1670
		.nops   = 3,
L
Linus Torvalds 已提交
1671 1672 1673 1674 1675 1676 1677 1678 1679
	};
	int status;

	xdr_init_encode(&xdr, &req->rq_snd_buf, p);
	encode_compound_hdr(&xdr, &hdr);
	status = encode_putfh(&xdr, args->fh);
	if (status)
		goto out;
	status = encode_open(&xdr, args);
1680 1681 1682
	if (status)
		goto out;
	status = encode_getfattr(&xdr, args->bitmask);
L
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1683 1684 1685 1686 1687 1688 1689
out:
	return status;
}

/*
 * Encode an OPEN_DOWNGRADE request
 */
A
Al Viro 已提交
1690
static int nfs4_xdr_enc_open_downgrade(struct rpc_rqst *req, __be32 *p, struct nfs_closeargs *args)
L
Linus Torvalds 已提交
1691 1692 1693
{
	struct xdr_stream xdr;
	struct compound_hdr hdr = {
1694
		.nops	= 3,
L
Linus Torvalds 已提交
1695 1696 1697 1698 1699 1700 1701 1702 1703
	};
	int status;

	xdr_init_encode(&xdr, &req->rq_snd_buf, p);
	encode_compound_hdr(&xdr, &hdr);
	status = encode_putfh(&xdr, args->fh);
	if (status)
		goto out;
	status = encode_open_downgrade(&xdr, args);
1704 1705 1706
	if (status != 0)
		goto out;
	status = encode_getfattr(&xdr, args->bitmask);
L
Linus Torvalds 已提交
1707 1708 1709 1710 1711 1712 1713
out:
	return status;
}

/*
 * Encode a LOCK request
 */
A
Al Viro 已提交
1714
static int nfs4_xdr_enc_lock(struct rpc_rqst *req, __be32 *p, struct nfs_lock_args *args)
L
Linus Torvalds 已提交
1715 1716 1717 1718 1719 1720 1721 1722 1723 1724 1725 1726 1727 1728 1729 1730 1731 1732 1733 1734
{
	struct xdr_stream xdr;
	struct compound_hdr hdr = {
		.nops   = 2,
	};
	int status;

	xdr_init_encode(&xdr, &req->rq_snd_buf, p);
	encode_compound_hdr(&xdr, &hdr);
	status = encode_putfh(&xdr, args->fh);
	if(status)
		goto out;
	status = encode_lock(&xdr, args);
out:
	return status;
}

/*
 * Encode a LOCKT request
 */
A
Al Viro 已提交
1735
static int nfs4_xdr_enc_lockt(struct rpc_rqst *req, __be32 *p, struct nfs_lockt_args *args)
L
Linus Torvalds 已提交
1736 1737 1738 1739 1740 1741 1742 1743 1744 1745 1746 1747 1748 1749 1750 1751 1752 1753 1754 1755
{
	struct xdr_stream xdr;
	struct compound_hdr hdr = {
		.nops   = 2,
	};
	int status;

	xdr_init_encode(&xdr, &req->rq_snd_buf, p);
	encode_compound_hdr(&xdr, &hdr);
	status = encode_putfh(&xdr, args->fh);
	if(status)
		goto out;
	status = encode_lockt(&xdr, args);
out:
	return status;
}

/*
 * Encode a LOCKU request
 */
A
Al Viro 已提交
1756
static int nfs4_xdr_enc_locku(struct rpc_rqst *req, __be32 *p, struct nfs_locku_args *args)
L
Linus Torvalds 已提交
1757 1758 1759 1760 1761 1762 1763 1764 1765 1766 1767 1768 1769 1770 1771 1772 1773 1774 1775 1776
{
	struct xdr_stream xdr;
	struct compound_hdr hdr = {
		.nops   = 2,
	};
	int status;

	xdr_init_encode(&xdr, &req->rq_snd_buf, p);
	encode_compound_hdr(&xdr, &hdr);
	status = encode_putfh(&xdr, args->fh);
	if(status)
		goto out;
	status = encode_locku(&xdr, args);
out:
	return status;
}

/*
 * Encode a READLINK request
 */
A
Al Viro 已提交
1777
static int nfs4_xdr_enc_readlink(struct rpc_rqst *req, __be32 *p, const struct nfs4_readlink *args)
L
Linus Torvalds 已提交
1778 1779 1780 1781 1782
{
	struct xdr_stream xdr;
	struct compound_hdr hdr = {
		.nops = 2,
	};
1783 1784
	struct rpc_auth *auth = req->rq_task->tk_msg.rpc_cred->cr_auth;
	unsigned int replen;
L
Linus Torvalds 已提交
1785 1786 1787 1788 1789 1790 1791 1792
	int status;

	xdr_init_encode(&xdr, &req->rq_snd_buf, p);
	encode_compound_hdr(&xdr, &hdr);
	status = encode_putfh(&xdr, args->fh);
	if(status)
		goto out;
	status = encode_readlink(&xdr, args, req);
1793 1794 1795 1796 1797 1798 1799 1800 1801

	/* 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);

L
Linus Torvalds 已提交
1802 1803 1804 1805 1806 1807 1808
out:
	return status;
}

/*
 * Encode a READDIR request
 */
A
Al Viro 已提交
1809
static int nfs4_xdr_enc_readdir(struct rpc_rqst *req, __be32 *p, const struct nfs4_readdir_arg *args)
L
Linus Torvalds 已提交
1810 1811 1812 1813 1814
{
	struct xdr_stream xdr;
	struct compound_hdr hdr = {
		.nops = 2,
	};
1815 1816
	struct rpc_auth *auth = req->rq_task->tk_msg.rpc_cred->cr_auth;
	int replen;
L
Linus Torvalds 已提交
1817 1818 1819 1820 1821 1822 1823 1824
	int status;

	xdr_init_encode(&xdr, &req->rq_snd_buf, p);
	encode_compound_hdr(&xdr, &hdr);
	status = encode_putfh(&xdr, args->fh);
	if(status)
		goto out;
	status = encode_readdir(&xdr, args, req);
1825 1826 1827 1828 1829 1830 1831 1832 1833

	/* 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",
1834
			__func__, replen, args->pages,
1835 1836
			args->pgbase, args->count);

L
Linus Torvalds 已提交
1837 1838 1839 1840 1841 1842 1843
out:
	return status;
}

/*
 * Encode a READ request
 */
A
Al Viro 已提交
1844
static int nfs4_xdr_enc_read(struct rpc_rqst *req, __be32 *p, struct nfs_readargs *args)
L
Linus Torvalds 已提交
1845
{
1846
	struct rpc_auth *auth = req->rq_task->tk_msg.rpc_cred->cr_auth;
L
Linus Torvalds 已提交
1847 1848 1849 1850 1851 1852 1853 1854 1855 1856 1857 1858 1859 1860 1861 1862 1863 1864 1865 1866 1867 1868
	struct xdr_stream xdr;
	struct compound_hdr hdr = {
		.nops = 2,
	};
	int replen, status;

	xdr_init_encode(&xdr, &req->rq_snd_buf, p);
	encode_compound_hdr(&xdr, &hdr);
	status = encode_putfh(&xdr, args->fh);
	if (status)
		goto out;
	status = encode_read(&xdr, args);
	if (status)
		goto out;

	/* 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);
1869
	req->rq_rcv_buf.flags |= XDRBUF_READ;
L
Linus Torvalds 已提交
1870 1871 1872 1873 1874 1875 1876
out:
	return status;
}

/*
 * Encode an SETATTR request
 */
A
Al Viro 已提交
1877
static int nfs4_xdr_enc_setattr(struct rpc_rqst *req, __be32 *p, struct nfs_setattrargs *args)
L
Linus Torvalds 已提交
1878 1879 1880 1881 1882 1883 1884 1885 1886 1887 1888 1889 1890 1891 1892 1893 1894 1895 1896 1897 1898

{
        struct xdr_stream xdr;
        struct compound_hdr hdr = {
                .nops   = 3,
        };
        int status;

        xdr_init_encode(&xdr, &req->rq_snd_buf, p);
        encode_compound_hdr(&xdr, &hdr);
        status = encode_putfh(&xdr, args->fh);
        if(status)
                goto out;
        status = encode_setattr(&xdr, args, args->server);
        if(status)
                goto out;
	status = encode_getfattr(&xdr, args->bitmask);
out:
        return status;
}

1899 1900 1901 1902
/*
 * Encode a GETACL request
 */
static int
A
Al Viro 已提交
1903
nfs4_xdr_enc_getacl(struct rpc_rqst *req, __be32 *p,
1904 1905 1906
		struct nfs_getaclargs *args)
{
	struct xdr_stream xdr;
1907
	struct rpc_auth *auth = req->rq_task->tk_msg.rpc_cred->cr_auth;
1908 1909 1910 1911 1912 1913 1914 1915 1916 1917 1918 1919 1920 1921 1922 1923 1924 1925 1926
	struct compound_hdr hdr = {
		.nops   = 2,
	};
	int replen, status;

	xdr_init_encode(&xdr, &req->rq_snd_buf, p);
	encode_compound_hdr(&xdr, &hdr);
	status = encode_putfh(&xdr, args->fh);
	if (status)
		goto out;
	status = encode_getattr_two(&xdr, FATTR4_WORD0_ACL, 0);
	/* 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);
out:
	return status;
}

L
Linus Torvalds 已提交
1927 1928 1929
/*
 * Encode a WRITE request
 */
A
Al Viro 已提交
1930
static int nfs4_xdr_enc_write(struct rpc_rqst *req, __be32 *p, struct nfs_writeargs *args)
L
Linus Torvalds 已提交
1931 1932 1933
{
	struct xdr_stream xdr;
	struct compound_hdr hdr = {
1934
		.nops = 3,
L
Linus Torvalds 已提交
1935 1936 1937 1938 1939 1940 1941 1942 1943
	};
	int status;

	xdr_init_encode(&xdr, &req->rq_snd_buf, p);
	encode_compound_hdr(&xdr, &hdr);
	status = encode_putfh(&xdr, args->fh);
	if (status)
		goto out;
	status = encode_write(&xdr, args);
1944 1945
	if (status)
		goto out;
1946
	req->rq_snd_buf.flags |= XDRBUF_WRITE;
1947
	status = encode_getfattr(&xdr, args->bitmask);
L
Linus Torvalds 已提交
1948 1949 1950 1951 1952 1953 1954
out:
	return status;
}

/*
 *  a COMMIT request
 */
A
Al Viro 已提交
1955
static int nfs4_xdr_enc_commit(struct rpc_rqst *req, __be32 *p, struct nfs_writeargs *args)
L
Linus Torvalds 已提交
1956 1957 1958
{
	struct xdr_stream xdr;
	struct compound_hdr hdr = {
1959
		.nops = 3,
L
Linus Torvalds 已提交
1960 1961 1962 1963 1964 1965 1966 1967 1968
	};
	int status;

	xdr_init_encode(&xdr, &req->rq_snd_buf, p);
	encode_compound_hdr(&xdr, &hdr);
	status = encode_putfh(&xdr, args->fh);
	if (status)
		goto out;
	status = encode_commit(&xdr, args);
1969 1970 1971
	if (status)
		goto out;
	status = encode_getfattr(&xdr, args->bitmask);
L
Linus Torvalds 已提交
1972 1973 1974 1975 1976 1977 1978
out:
	return status;
}

/*
 * FSINFO request
 */
A
Al Viro 已提交
1979
static int nfs4_xdr_enc_fsinfo(struct rpc_rqst *req, __be32 *p, struct nfs4_fsinfo_arg *args)
L
Linus Torvalds 已提交
1980 1981 1982 1983 1984 1985 1986 1987 1988 1989 1990 1991 1992 1993 1994 1995 1996 1997
{
	struct xdr_stream xdr;
	struct compound_hdr hdr = {
		.nops	= 2,
	};
	int status;

	xdr_init_encode(&xdr, &req->rq_snd_buf, p);
	encode_compound_hdr(&xdr, &hdr);
	status = encode_putfh(&xdr, args->fh);
	if (!status)
		status = encode_fsinfo(&xdr, args->bitmask);
	return status;
}

/*
 * a PATHCONF request
 */
A
Al Viro 已提交
1998
static int nfs4_xdr_enc_pathconf(struct rpc_rqst *req, __be32 *p, const struct nfs4_pathconf_arg *args)
L
Linus Torvalds 已提交
1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017
{
	struct xdr_stream xdr;
	struct compound_hdr hdr = {
		.nops = 2,
	};
	int status;

	xdr_init_encode(&xdr, &req->rq_snd_buf, p);
	encode_compound_hdr(&xdr, &hdr);
	status = encode_putfh(&xdr, args->fh);
	if (!status)
		status = encode_getattr_one(&xdr,
				args->bitmask[0] & nfs4_pathconf_bitmap[0]);
	return status;
}

/*
 * a STATFS request
 */
A
Al Viro 已提交
2018
static int nfs4_xdr_enc_statfs(struct rpc_rqst *req, __be32 *p, const struct nfs4_statfs_arg *args)
L
Linus Torvalds 已提交
2019 2020 2021 2022 2023 2024 2025 2026 2027 2028 2029 2030 2031 2032 2033 2034 2035 2036 2037 2038
{
	struct xdr_stream xdr;
	struct compound_hdr hdr = {
		.nops = 2,
	};
	int status;

	xdr_init_encode(&xdr, &req->rq_snd_buf, p);
	encode_compound_hdr(&xdr, &hdr);
	status = encode_putfh(&xdr, args->fh);
	if (status == 0)
		status = encode_getattr_two(&xdr,
				args->bitmask[0] & nfs4_statfs_bitmap[0],
				args->bitmask[1] & nfs4_statfs_bitmap[1]);
	return status;
}

/*
 * GETATTR_BITMAP request
 */
A
Al Viro 已提交
2039
static int nfs4_xdr_enc_server_caps(struct rpc_rqst *req, __be32 *p, const struct nfs_fh *fhandle)
L
Linus Torvalds 已提交
2040 2041 2042 2043 2044 2045 2046 2047 2048 2049 2050 2051 2052 2053 2054 2055 2056 2057 2058 2059 2060
{
	struct xdr_stream xdr;
	struct compound_hdr hdr = {
		.nops = 2,
	};
	int status;

	xdr_init_encode(&xdr, &req->rq_snd_buf, p);
	encode_compound_hdr(&xdr, &hdr);
	status = encode_putfh(&xdr, fhandle);
	if (status == 0)
		status = encode_getattr_one(&xdr, FATTR4_WORD0_SUPPORTED_ATTRS|
				FATTR4_WORD0_LINK_SUPPORT|
				FATTR4_WORD0_SYMLINK_SUPPORT|
				FATTR4_WORD0_ACLSUPPORT);
	return status;
}

/*
 * a RENEW request
 */
A
Al Viro 已提交
2061
static int nfs4_xdr_enc_renew(struct rpc_rqst *req, __be32 *p, struct nfs_client *clp)
L
Linus Torvalds 已提交
2062 2063 2064 2065 2066 2067 2068 2069 2070 2071 2072 2073 2074 2075
{
	struct xdr_stream xdr;
	struct compound_hdr hdr = {
		.nops	= 1,
	};

	xdr_init_encode(&xdr, &req->rq_snd_buf, p);
	encode_compound_hdr(&xdr, &hdr);
	return encode_renew(&xdr, clp);
}

/*
 * a SETCLIENTID request
 */
A
Al Viro 已提交
2076
static int nfs4_xdr_enc_setclientid(struct rpc_rqst *req, __be32 *p, struct nfs4_setclientid *sc)
L
Linus Torvalds 已提交
2077 2078 2079 2080 2081 2082 2083 2084 2085 2086 2087 2088 2089 2090
{
	struct xdr_stream xdr;
	struct compound_hdr hdr = {
		.nops	= 1,
	};

	xdr_init_encode(&xdr, &req->rq_snd_buf, p);
	encode_compound_hdr(&xdr, &hdr);
	return encode_setclientid(&xdr, sc);
}

/*
 * a SETCLIENTID_CONFIRM request
 */
A
Al Viro 已提交
2091
static int nfs4_xdr_enc_setclientid_confirm(struct rpc_rqst *req, __be32 *p, struct nfs_client *clp)
L
Linus Torvalds 已提交
2092 2093 2094 2095 2096 2097 2098 2099 2100 2101 2102 2103 2104 2105 2106 2107 2108 2109 2110 2111 2112
{
	struct xdr_stream xdr;
	struct compound_hdr hdr = {
		.nops	= 3,
	};
	const u32 lease_bitmap[2] = { FATTR4_WORD0_LEASE_TIME, 0 };
	int status;

	xdr_init_encode(&xdr, &req->rq_snd_buf, p);
	encode_compound_hdr(&xdr, &hdr);
	status = encode_setclientid_confirm(&xdr, clp);
	if (!status)
		status = encode_putrootfh(&xdr);
	if (!status)
		status = encode_fsinfo(&xdr, lease_bitmap);
	return status;
}

/*
 * DELEGRETURN request
 */
A
Al Viro 已提交
2113
static int nfs4_xdr_enc_delegreturn(struct rpc_rqst *req, __be32 *p, const struct nfs4_delegreturnargs *args)
L
Linus Torvalds 已提交
2114 2115 2116
{
	struct xdr_stream xdr;
	struct compound_hdr hdr = {
2117
		.nops = 3,
L
Linus Torvalds 已提交
2118 2119 2120 2121 2122
	};
	int status;

	xdr_init_encode(&xdr, &req->rq_snd_buf, p);
	encode_compound_hdr(&xdr, &hdr);
2123 2124 2125 2126 2127 2128 2129 2130
	status = encode_putfh(&xdr, args->fhandle);
	if (status != 0)
		goto out;
	status = encode_delegreturn(&xdr, args->stateid);
	if (status != 0)
		goto out;
	status = encode_getfattr(&xdr, args->bitmask);
out:
L
Linus Torvalds 已提交
2131 2132 2133
	return status;
}

2134 2135 2136
/*
 * Encode FS_LOCATIONS request
 */
A
Al Viro 已提交
2137
static int nfs4_xdr_enc_fs_locations(struct rpc_rqst *req, __be32 *p, struct nfs4_fs_locations_arg *args)
2138 2139 2140 2141 2142
{
	struct xdr_stream xdr;
	struct compound_hdr hdr = {
		.nops = 3,
	};
2143
	struct rpc_auth *auth = req->rq_task->tk_msg.rpc_cred->cr_auth;
2144 2145 2146 2147 2148 2149 2150 2151 2152
	int replen;
	int status;

	xdr_init_encode(&xdr, &req->rq_snd_buf, p);
	encode_compound_hdr(&xdr, &hdr);
	if ((status = encode_putfh(&xdr, args->dir_fh)) != 0)
		goto out;
	if ((status = encode_lookup(&xdr, args->name)) != 0)
		goto out;
2153
	if ((status = encode_fs_locations(&xdr, args->bitmask)) != 0)
2154 2155
		goto out;
	/* set up reply
2156
	 *   toplevel_status + OP_PUTFH + status
2157 2158 2159 2160 2161 2162 2163 2164 2165
	 *   + 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);
out:
	return status;
}

L
Linus Torvalds 已提交
2166 2167 2168 2169 2170 2171 2172 2173 2174 2175 2176 2177 2178 2179 2180 2181 2182 2183 2184 2185 2186 2187 2188 2189 2190 2191 2192
/*
 * 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); \
2193
	if (unlikely(!p)) { \
2194
		dprintk("nfs: %s: prematurely hit end of receive" \
2195
				" buffer\n", __func__); \
2196
		dprintk("nfs: %s: xdr->p=%p, bytes=%u, xdr->end=%p\n", \
2197
				__func__, xdr->p, nbytes, xdr->end); \
L
Linus Torvalds 已提交
2198 2199 2200 2201
		return -EIO; \
	} \
} while (0)

2202
static int decode_opaque_inline(struct xdr_stream *xdr, unsigned int *len, char **string)
L
Linus Torvalds 已提交
2203
{
A
Al Viro 已提交
2204
	__be32 *p;
L
Linus Torvalds 已提交
2205 2206 2207 2208 2209 2210 2211 2212 2213 2214

	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)
{
A
Al Viro 已提交
2215
	__be32 *p;
L
Linus Torvalds 已提交
2216 2217 2218 2219

	READ_BUF(8);
	READ32(hdr->status);
	READ32(hdr->taglen);
2220

L
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2221 2222 2223 2224
	READ_BUF(hdr->taglen + 4);
	hdr->tag = (char *)p;
	p += XDR_QUADLEN(hdr->taglen);
	READ32(hdr->nops);
2225 2226
	if (unlikely(hdr->nops < 1))
		return nfs4_stat_to_errno(hdr->status);
L
Linus Torvalds 已提交
2227 2228 2229 2230 2231
	return 0;
}

static int decode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 expected)
{
A
Al Viro 已提交
2232
	__be32 *p;
L
Linus Torvalds 已提交
2233 2234 2235 2236 2237 2238
	uint32_t opnum;
	int32_t nfserr;

	READ_BUF(8);
	READ32(opnum);
	if (opnum != expected) {
2239 2240
		dprintk("nfs: Server returned operation"
			" %d but we issued a request for %d\n",
L
Linus Torvalds 已提交
2241 2242 2243 2244 2245
				opnum, expected);
		return -EIO;
	}
	READ32(nfserr);
	if (nfserr != NFS_OK)
2246
		return nfs4_stat_to_errno(nfserr);
L
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2247 2248 2249 2250
	return 0;
}

/* Dummy routine */
2251
static int decode_ace(struct xdr_stream *xdr, void *ace, struct nfs_client *clp)
L
Linus Torvalds 已提交
2252
{
A
Al Viro 已提交
2253
	__be32 *p;
2254
	unsigned int strlen;
L
Linus Torvalds 已提交
2255 2256 2257 2258 2259 2260 2261 2262
	char *str;

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

static int decode_attr_bitmap(struct xdr_stream *xdr, uint32_t *bitmap)
{
A
Al Viro 已提交
2263 2264
	uint32_t bmlen;
	__be32 *p;
L
Linus Torvalds 已提交
2265 2266 2267 2268 2269 2270 2271 2272 2273 2274 2275 2276 2277 2278

	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;
}

A
Al Viro 已提交
2279
static inline int decode_attr_length(struct xdr_stream *xdr, uint32_t *attrlen, __be32 **savep)
L
Linus Torvalds 已提交
2280
{
A
Al Viro 已提交
2281
	__be32 *p;
L
Linus Torvalds 已提交
2282 2283 2284 2285 2286 2287 2288 2289 2290 2291 2292 2293 2294 2295

	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;
2296
	dprintk("%s: bitmask=%08x:%08x\n", __func__, bitmask[0], bitmask[1]);
L
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2297 2298 2299 2300 2301
	return 0;
}

static int decode_attr_type(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *type)
{
A
Al Viro 已提交
2302
	__be32 *p;
L
Linus Torvalds 已提交
2303 2304 2305 2306 2307 2308 2309 2310

	*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) {
2311
			dprintk("%s: bad type %d\n", __func__, *type);
L
Linus Torvalds 已提交
2312 2313 2314 2315
			return -EIO;
		}
		bitmap[0] &= ~FATTR4_WORD0_TYPE;
	}
2316
	dprintk("%s: type=0%o\n", __func__, nfs_type2fmt[*type].nfs2type);
L
Linus Torvalds 已提交
2317 2318 2319 2320 2321
	return 0;
}

static int decode_attr_change(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *change)
{
A
Al Viro 已提交
2322
	__be32 *p;
L
Linus Torvalds 已提交
2323 2324 2325 2326 2327 2328 2329 2330 2331

	*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;
	}
2332
	dprintk("%s: change attribute=%Lu\n", __func__,
L
Linus Torvalds 已提交
2333 2334 2335 2336 2337 2338
			(unsigned long long)*change);
	return 0;
}

static int decode_attr_size(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *size)
{
A
Al Viro 已提交
2339
	__be32 *p;
L
Linus Torvalds 已提交
2340 2341 2342 2343 2344 2345 2346 2347 2348

	*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;
	}
2349
	dprintk("%s: file size=%Lu\n", __func__, (unsigned long long)*size);
L
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2350 2351 2352 2353 2354
	return 0;
}

static int decode_attr_link_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
{
A
Al Viro 已提交
2355
	__be32 *p;
L
Linus Torvalds 已提交
2356 2357 2358 2359 2360 2361 2362 2363 2364

	*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;
	}
2365
	dprintk("%s: link support=%s\n", __func__, *res == 0 ? "false" : "true");
L
Linus Torvalds 已提交
2366 2367 2368 2369 2370
	return 0;
}

static int decode_attr_symlink_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
{
A
Al Viro 已提交
2371
	__be32 *p;
L
Linus Torvalds 已提交
2372 2373 2374 2375 2376 2377 2378 2379 2380

	*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;
	}
2381
	dprintk("%s: symlink support=%s\n", __func__, *res == 0 ? "false" : "true");
L
Linus Torvalds 已提交
2382 2383 2384
	return 0;
}

2385
static int decode_attr_fsid(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_fsid *fsid)
L
Linus Torvalds 已提交
2386
{
A
Al Viro 已提交
2387
	__be32 *p;
L
Linus Torvalds 已提交
2388 2389 2390 2391 2392 2393 2394 2395 2396 2397 2398

	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;
	}
2399
	dprintk("%s: fsid=(0x%Lx/0x%Lx)\n", __func__,
L
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2400 2401 2402 2403 2404 2405 2406
			(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)
{
A
Al Viro 已提交
2407
	__be32 *p;
L
Linus Torvalds 已提交
2408 2409 2410 2411 2412 2413 2414 2415 2416

	*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;
	}
2417
	dprintk("%s: file size=%u\n", __func__, (unsigned int)*res);
L
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2418 2419 2420 2421 2422
	return 0;
}

static int decode_attr_aclsupport(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
{
A
Al Viro 已提交
2423
	__be32 *p;
L
Linus Torvalds 已提交
2424 2425 2426 2427 2428 2429 2430 2431 2432

	*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;
	}
2433
	dprintk("%s: ACLs supported=%u\n", __func__, (unsigned int)*res);
L
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2434 2435 2436 2437 2438
	return 0;
}

static int decode_attr_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
{
A
Al Viro 已提交
2439
	__be32 *p;
L
Linus Torvalds 已提交
2440 2441 2442 2443 2444 2445 2446 2447 2448

	*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;
	}
2449
	dprintk("%s: fileid=%Lu\n", __func__, (unsigned long long)*fileid);
L
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2450 2451 2452
	return 0;
}

2453 2454
static int decode_attr_mounted_on_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
{
A
Al Viro 已提交
2455
	__be32 *p;
2456 2457 2458 2459 2460 2461 2462 2463 2464

	*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;
	}
2465
	dprintk("%s: fileid=%Lu\n", __func__, (unsigned long long)*fileid);
2466 2467 2468
	return 0;
}

L
Linus Torvalds 已提交
2469 2470
static int decode_attr_files_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
{
A
Al Viro 已提交
2471
	__be32 *p;
L
Linus Torvalds 已提交
2472 2473 2474 2475 2476 2477 2478 2479 2480 2481
	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;
	}
2482
	dprintk("%s: files avail=%Lu\n", __func__, (unsigned long long)*res);
L
Linus Torvalds 已提交
2483 2484 2485 2486 2487
	return status;
}

static int decode_attr_files_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
{
A
Al Viro 已提交
2488
	__be32 *p;
L
Linus Torvalds 已提交
2489 2490 2491 2492 2493 2494 2495 2496 2497 2498
	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;
	}
2499
	dprintk("%s: files free=%Lu\n", __func__, (unsigned long long)*res);
L
Linus Torvalds 已提交
2500 2501 2502 2503 2504
	return status;
}

static int decode_attr_files_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
{
A
Al Viro 已提交
2505
	__be32 *p;
L
Linus Torvalds 已提交
2506 2507 2508 2509 2510 2511 2512 2513 2514 2515
	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;
	}
2516
	dprintk("%s: files total=%Lu\n", __func__, (unsigned long long)*res);
L
Linus Torvalds 已提交
2517 2518 2519
	return status;
}

2520 2521
static int decode_pathname(struct xdr_stream *xdr, struct nfs4_pathname *path)
{
2522
	u32 n;
A
Al Viro 已提交
2523
	__be32 *p;
2524 2525 2526 2527
	int status = 0;

	READ_BUF(4);
	READ32(n);
2528 2529
	if (n == 0)
		goto root_path;
2530 2531 2532 2533 2534 2535 2536 2537 2538 2539 2540 2541 2542 2543 2544 2545 2546 2547 2548 2549
	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;
2550 2551 2552 2553 2554 2555 2556
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;
2557 2558 2559 2560 2561 2562 2563
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)
2564 2565
{
	int n;
A
Al Viro 已提交
2566
	__be32 *p;
2567 2568 2569 2570 2571 2572 2573
	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;
2574
	dprintk("%s: fsroot ", __func__);
2575
	status = decode_pathname(xdr, &res->fs_path);
2576 2577 2578 2579 2580 2581 2582 2583
	if (unlikely(status != 0))
		goto out;
	READ_BUF(4);
	READ32(n);
	if (n <= 0)
		goto out_eio;
	res->nlocations = 0;
	while (res->nlocations < n) {
2584
		u32 m;
2585
		struct nfs4_fs_location *loc = &res->locations[res->nlocations];
2586

2587 2588 2589 2590
		READ_BUF(4);
		READ32(m);

		loc->nservers = 0;
2591
		dprintk("%s: servers ", __func__);
2592 2593 2594 2595 2596 2597 2598 2599 2600
		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 {
2601 2602 2603
				unsigned int i;
				dprintk("%s: using first %u of %u servers "
					"returned for location %u\n",
2604
						__func__,
2605 2606
						NFS4_FS_LOCATION_MAXSERVERS,
						m, res->nlocations);
2607
				for (i = loc->nservers; i < m; i++) {
T
Trond Myklebust 已提交
2608
					unsigned int len;
2609 2610 2611 2612 2613 2614 2615 2616
					char *data;
					status = decode_opaque_inline(xdr, &len, &data);
					if (unlikely(status != 0))
						goto out_eio;
				}
			}
		}
		status = decode_pathname(xdr, &loc->rootpath);
2617 2618
		if (unlikely(status != 0))
			goto out_eio;
2619
		if (res->nlocations < NFS4_FS_LOCATIONS_MAXENTRIES)
2620 2621 2622
			res->nlocations++;
	}
out:
2623
	dprintk("%s: fs_locations done, error = %d\n", __func__, status);
2624 2625 2626 2627 2628 2629
	return status;
out_eio:
	status = -EIO;
	goto out;
}

L
Linus Torvalds 已提交
2630 2631
static int decode_attr_maxfilesize(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
{
A
Al Viro 已提交
2632
	__be32 *p;
L
Linus Torvalds 已提交
2633 2634 2635 2636 2637 2638 2639 2640 2641 2642
	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;
	}
2643
	dprintk("%s: maxfilesize=%Lu\n", __func__, (unsigned long long)*res);
L
Linus Torvalds 已提交
2644 2645 2646 2647 2648
	return status;
}

static int decode_attr_maxlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxlink)
{
A
Al Viro 已提交
2649
	__be32 *p;
L
Linus Torvalds 已提交
2650 2651 2652 2653 2654 2655 2656 2657 2658 2659
	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;
	}
2660
	dprintk("%s: maxlink=%u\n", __func__, *maxlink);
L
Linus Torvalds 已提交
2661 2662 2663 2664 2665
	return status;
}

static int decode_attr_maxname(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxname)
{
A
Al Viro 已提交
2666
	__be32 *p;
L
Linus Torvalds 已提交
2667 2668 2669 2670 2671 2672 2673 2674 2675 2676
	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;
	}
2677
	dprintk("%s: maxname=%u\n", __func__, *maxname);
L
Linus Torvalds 已提交
2678 2679 2680 2681 2682
	return status;
}

static int decode_attr_maxread(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
{
A
Al Viro 已提交
2683
	__be32 *p;
L
Linus Torvalds 已提交
2684 2685 2686 2687 2688 2689 2690 2691 2692 2693 2694 2695 2696 2697
	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;
	}
2698
	dprintk("%s: maxread=%lu\n", __func__, (unsigned long)*res);
L
Linus Torvalds 已提交
2699 2700 2701 2702 2703
	return status;
}

static int decode_attr_maxwrite(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
{
A
Al Viro 已提交
2704
	__be32 *p;
L
Linus Torvalds 已提交
2705 2706 2707 2708 2709 2710 2711 2712 2713 2714 2715 2716 2717 2718
	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;
	}
2719
	dprintk("%s: maxwrite=%lu\n", __func__, (unsigned long)*res);
L
Linus Torvalds 已提交
2720 2721 2722 2723 2724
	return status;
}

static int decode_attr_mode(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *mode)
{
A
Al Viro 已提交
2725
	__be32 *p;
L
Linus Torvalds 已提交
2726 2727 2728 2729 2730 2731 2732 2733 2734 2735

	*mode = 0;
	if (unlikely(bitmap[1] & (FATTR4_WORD1_MODE - 1U)))
		return -EIO;
	if (likely(bitmap[1] & FATTR4_WORD1_MODE)) {
		READ_BUF(4);
		READ32(*mode);
		*mode &= ~S_IFMT;
		bitmap[1] &= ~FATTR4_WORD1_MODE;
	}
2736
	dprintk("%s: file mode=0%o\n", __func__, (unsigned int)*mode);
L
Linus Torvalds 已提交
2737 2738 2739 2740 2741
	return 0;
}

static int decode_attr_nlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *nlink)
{
A
Al Viro 已提交
2742
	__be32 *p;
L
Linus Torvalds 已提交
2743 2744 2745 2746 2747 2748 2749 2750 2751

	*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;
	}
2752
	dprintk("%s: nlink=%u\n", __func__, (unsigned int)*nlink);
L
Linus Torvalds 已提交
2753 2754 2755
	return 0;
}

T
Trond Myklebust 已提交
2756
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
2757
{
A
Al Viro 已提交
2758 2759
	uint32_t len;
	__be32 *p;
L
Linus Torvalds 已提交
2760 2761 2762 2763 2764 2765 2766 2767 2768 2769 2770

	*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",
2771
						__func__);
L
Linus Torvalds 已提交
2772
		} else
2773
			dprintk("%s: name too long (%u)!\n",
2774
					__func__, len);
L
Linus Torvalds 已提交
2775 2776
		bitmap[1] &= ~FATTR4_WORD1_OWNER;
	}
2777
	dprintk("%s: uid=%d\n", __func__, (int)*uid);
L
Linus Torvalds 已提交
2778 2779 2780
	return 0;
}

T
Trond Myklebust 已提交
2781
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
2782
{
A
Al Viro 已提交
2783 2784
	uint32_t len;
	__be32 *p;
L
Linus Torvalds 已提交
2785 2786 2787 2788 2789 2790 2791 2792 2793 2794 2795

	*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",
2796
						__func__);
L
Linus Torvalds 已提交
2797
		} else
2798
			dprintk("%s: name too long (%u)!\n",
2799
					__func__, len);
L
Linus Torvalds 已提交
2800 2801
		bitmap[1] &= ~FATTR4_WORD1_OWNER_GROUP;
	}
2802
	dprintk("%s: gid=%d\n", __func__, (int)*gid);
L
Linus Torvalds 已提交
2803 2804 2805 2806 2807
	return 0;
}

static int decode_attr_rdev(struct xdr_stream *xdr, uint32_t *bitmap, dev_t *rdev)
{
A
Al Viro 已提交
2808 2809
	uint32_t major = 0, minor = 0;
	__be32 *p;
L
Linus Torvalds 已提交
2810 2811 2812 2813 2814 2815 2816 2817 2818 2819 2820 2821 2822 2823 2824

	*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;
	}
2825
	dprintk("%s: rdev=(0x%x:0x%x)\n", __func__, major, minor);
L
Linus Torvalds 已提交
2826 2827 2828 2829 2830
	return 0;
}

static int decode_attr_space_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
{
A
Al Viro 已提交
2831
	__be32 *p;
L
Linus Torvalds 已提交
2832 2833 2834 2835 2836 2837 2838 2839 2840 2841
	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;
	}
2842
	dprintk("%s: space avail=%Lu\n", __func__, (unsigned long long)*res);
L
Linus Torvalds 已提交
2843 2844 2845 2846 2847
	return status;
}

static int decode_attr_space_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
{
A
Al Viro 已提交
2848
	__be32 *p;
L
Linus Torvalds 已提交
2849 2850 2851 2852 2853 2854 2855 2856 2857 2858
	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;
	}
2859
	dprintk("%s: space free=%Lu\n", __func__, (unsigned long long)*res);
L
Linus Torvalds 已提交
2860 2861 2862 2863 2864
	return status;
}

static int decode_attr_space_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
{
A
Al Viro 已提交
2865
	__be32 *p;
L
Linus Torvalds 已提交
2866 2867 2868 2869 2870 2871 2872 2873 2874 2875
	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;
	}
2876
	dprintk("%s: space total=%Lu\n", __func__, (unsigned long long)*res);
L
Linus Torvalds 已提交
2877 2878 2879 2880 2881
	return status;
}

static int decode_attr_space_used(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *used)
{
A
Al Viro 已提交
2882
	__be32 *p;
L
Linus Torvalds 已提交
2883 2884 2885 2886 2887 2888 2889 2890 2891

	*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;
	}
2892
	dprintk("%s: space used=%Lu\n", __func__,
L
Linus Torvalds 已提交
2893 2894 2895 2896 2897 2898
			(unsigned long long)*used);
	return 0;
}

static int decode_attr_time(struct xdr_stream *xdr, struct timespec *time)
{
A
Al Viro 已提交
2899
	__be32 *p;
L
Linus Torvalds 已提交
2900 2901 2902 2903 2904 2905 2906 2907 2908 2909 2910 2911 2912 2913 2914 2915 2916 2917 2918 2919 2920 2921 2922
	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;
	}
2923
	dprintk("%s: atime=%ld\n", __func__, (long)time->tv_sec);
L
Linus Torvalds 已提交
2924 2925 2926 2927 2928 2929 2930 2931 2932 2933 2934 2935 2936 2937 2938
	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;
	}
2939
	dprintk("%s: ctime=%ld\n", __func__, (long)time->tv_sec);
L
Linus Torvalds 已提交
2940 2941 2942 2943 2944 2945 2946 2947 2948 2949 2950 2951 2952 2953 2954
	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;
	}
2955
	dprintk("%s: mtime=%ld\n", __func__, (long)time->tv_sec);
L
Linus Torvalds 已提交
2956 2957 2958
	return status;
}

A
Al Viro 已提交
2959
static int verify_attr_len(struct xdr_stream *xdr, __be32 *savep, uint32_t attrlen)
L
Linus Torvalds 已提交
2960 2961 2962 2963 2964
{
	unsigned int attrwords = XDR_QUADLEN(attrlen);
	unsigned int nwords = xdr->p - savep;

	if (unlikely(attrwords != nwords)) {
2965 2966
		dprintk("%s: server returned incorrect attribute length: "
			"%u %c %u\n",
2967
				__func__,
L
Linus Torvalds 已提交
2968 2969 2970 2971 2972 2973 2974 2975 2976 2977
				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
2978
	__be32 *p;
L
Linus Torvalds 已提交
2979 2980 2981 2982 2983 2984 2985 2986 2987 2988

	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
2989
	__be32 *p;
L
Linus Torvalds 已提交
2990 2991 2992 2993 2994 2995 2996 2997 2998 2999 3000 3001 3002 3003 3004 3005
	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
3006
	__be32 *p;
L
Linus Torvalds 已提交
3007 3008 3009
	int status;

	status = decode_op_hdr(xdr, OP_CLOSE);
3010 3011
	if (status != -EIO)
		nfs_increment_open_seqid(status, res->seqid);
L
Linus Torvalds 已提交
3012 3013
	if (status)
		return status;
3014 3015
	READ_BUF(NFS4_STATEID_SIZE);
	COPYMEM(res->stateid.data, NFS4_STATEID_SIZE);
L
Linus Torvalds 已提交
3016 3017 3018 3019 3020
	return 0;
}

static int decode_commit(struct xdr_stream *xdr, struct nfs_writeres *res)
{
A
Al Viro 已提交
3021
	__be32 *p;
L
Linus Torvalds 已提交
3022 3023 3024 3025 3026 3027 3028 3029 3030 3031 3032 3033
	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
3034
	__be32 *p;
L
Linus Torvalds 已提交
3035 3036 3037 3038 3039 3040 3041 3042 3043 3044 3045 3046 3047 3048 3049 3050
	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
3051
	__be32 *savep;
3052
	uint32_t attrlen, bitmap[2] = {0};
L
Linus Torvalds 已提交
3053 3054 3055 3056 3057 3058 3059 3060 3061 3062 3063 3064 3065 3066 3067 3068 3069 3070
	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:
3071
	dprintk("%s: xdr returned %d!\n", __func__, -status);
L
Linus Torvalds 已提交
3072 3073
	return status;
}
3074

L
Linus Torvalds 已提交
3075 3076
static int decode_statfs(struct xdr_stream *xdr, struct nfs_fsstat *fsstat)
{
A
Al Viro 已提交
3077
	__be32 *savep;
3078
	uint32_t attrlen, bitmap[2] = {0};
L
Linus Torvalds 已提交
3079
	int status;
3080

L
Linus Torvalds 已提交
3081 3082 3083 3084 3085 3086 3087 3088 3089 3090 3091 3092 3093 3094 3095 3096 3097 3098 3099 3100 3101 3102
	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:
3103
	dprintk("%s: xdr returned %d!\n", __func__, -status);
L
Linus Torvalds 已提交
3104 3105 3106 3107 3108
	return status;
}

static int decode_pathconf(struct xdr_stream *xdr, struct nfs_pathconf *pathconf)
{
A
Al Viro 已提交
3109
	__be32 *savep;
3110
	uint32_t attrlen, bitmap[2] = {0};
L
Linus Torvalds 已提交
3111
	int status;
3112

L
Linus Torvalds 已提交
3113 3114 3115 3116 3117 3118 3119 3120 3121 3122 3123 3124 3125 3126
	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:
3127
	dprintk("%s: xdr returned %d!\n", __func__, -status);
L
Linus Torvalds 已提交
3128 3129 3130 3131 3132
	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
3133
	__be32 *savep;
L
Linus Torvalds 已提交
3134 3135 3136 3137
	uint32_t attrlen,
		 bitmap[2] = {0},
		 type;
	int status, fmode = 0;
3138
	uint64_t fileid;
L
Linus Torvalds 已提交
3139 3140 3141 3142 3143 3144 3145 3146 3147 3148 3149 3150 3151 3152 3153 3154 3155 3156 3157 3158 3159 3160

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

	fattr->bitmap[0] = bitmap[0];
	fattr->bitmap[1] = bitmap[1];

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


	if ((status = decode_attr_type(xdr, bitmap, &type)) != 0)
		goto xdr_error;
	fattr->type = nfs_type2fmt[type].nfs2type;
	fmode = nfs_type2fmt[type].mode;

	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;
3161
	if ((status = decode_attr_fsid(xdr, bitmap, &fattr->fsid)) != 0)
L
Linus Torvalds 已提交
3162 3163 3164
		goto xdr_error;
	if ((status = decode_attr_fileid(xdr, bitmap, &fattr->fileid)) != 0)
		goto xdr_error;
3165
	if ((status = decode_attr_fs_locations(xdr, bitmap, container_of(fattr,
3166
						struct nfs4_fs_locations,
3167 3168
						fattr))) != 0)
		goto xdr_error;
L
Linus Torvalds 已提交
3169 3170 3171 3172 3173
	if ((status = decode_attr_mode(xdr, bitmap, &fattr->mode)) != 0)
		goto xdr_error;
	fattr->mode |= fmode;
	if ((status = decode_attr_nlink(xdr, bitmap, &fattr->nlink)) != 0)
		goto xdr_error;
3174
	if ((status = decode_attr_owner(xdr, bitmap, server->nfs_client, &fattr->uid)) != 0)
L
Linus Torvalds 已提交
3175
		goto xdr_error;
3176
	if ((status = decode_attr_group(xdr, bitmap, server->nfs_client, &fattr->gid)) != 0)
L
Linus Torvalds 已提交
3177 3178 3179 3180 3181 3182 3183 3184 3185 3186 3187
		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;
3188 3189 3190 3191
	if ((status = decode_attr_mounted_on_fileid(xdr, bitmap, &fileid)) != 0)
		goto xdr_error;
	if (fattr->fileid == 0 && fileid != 0)
		fattr->fileid = fileid;
3192
	if ((status = verify_attr_len(xdr, savep, attrlen)) == 0)
L
Linus Torvalds 已提交
3193 3194
		fattr->valid = NFS_ATTR_FATTR | NFS_ATTR_FATTR_V3 | NFS_ATTR_FATTR_V4;
xdr_error:
3195
	dprintk("%s: xdr returned %d\n", __func__, -status);
L
Linus Torvalds 已提交
3196 3197 3198 3199 3200 3201
	return status;
}


static int decode_fsinfo(struct xdr_stream *xdr, struct nfs_fsinfo *fsinfo)
{
A
Al Viro 已提交
3202
	__be32 *savep;
L
Linus Torvalds 已提交
3203 3204 3205 3206 3207 3208 3209 3210 3211 3212 3213 3214 3215 3216 3217 3218 3219 3220 3221 3222 3223 3224 3225 3226 3227
	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:
3228
	dprintk("%s: xdr returned %d!\n", __func__, -status);
L
Linus Torvalds 已提交
3229 3230 3231 3232 3233
	return status;
}

static int decode_getfh(struct xdr_stream *xdr, struct nfs_fh *fh)
{
A
Al Viro 已提交
3234
	__be32 *p;
L
Linus Torvalds 已提交
3235 3236 3237
	uint32_t len;
	int status;

3238 3239 3240
	/* Zero handle first to allow comparisons */
	memset(fh, 0, sizeof(*fh));

L
Linus Torvalds 已提交
3241 3242 3243 3244 3245 3246 3247 3248 3249 3250 3251 3252 3253 3254 3255 3256 3257
	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;
3258

L
Linus Torvalds 已提交
3259 3260 3261 3262 3263 3264 3265 3266 3267
	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
3268
static int decode_lock_denied (struct xdr_stream *xdr, struct file_lock *fl)
L
Linus Torvalds 已提交
3269
{
T
Trond Myklebust 已提交
3270
	uint64_t offset, length, clientid;
A
Al Viro 已提交
3271
	__be32 *p;
T
Trond Myklebust 已提交
3272
	uint32_t namelen, type;
L
Linus Torvalds 已提交
3273 3274

	READ_BUF(32);
T
Trond Myklebust 已提交
3275 3276 3277 3278 3279 3280 3281 3282 3283 3284 3285 3286 3287 3288
	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
3289 3290 3291 3292 3293
	READ32(namelen);
	READ_BUF(namelen);
	return -NFS4ERR_DENIED;
}

T
Trond Myklebust 已提交
3294
static int decode_lock(struct xdr_stream *xdr, struct nfs_lock_res *res)
L
Linus Torvalds 已提交
3295
{
A
Al Viro 已提交
3296
	__be32 *p;
L
Linus Torvalds 已提交
3297 3298 3299
	int status;

	status = decode_op_hdr(xdr, OP_LOCK);
3300 3301
	if (status == -EIO)
		goto out;
L
Linus Torvalds 已提交
3302
	if (status == 0) {
3303 3304
		READ_BUF(NFS4_STATEID_SIZE);
		COPYMEM(res->stateid.data, NFS4_STATEID_SIZE);
L
Linus Torvalds 已提交
3305
	} else if (status == -NFS4ERR_DENIED)
3306 3307 3308 3309 3310
		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
3311 3312 3313
	return status;
}

T
Trond Myklebust 已提交
3314
static int decode_lockt(struct xdr_stream *xdr, struct nfs_lockt_res *res)
L
Linus Torvalds 已提交
3315 3316 3317 3318
{
	int status;
	status = decode_op_hdr(xdr, OP_LOCKT);
	if (status == -NFS4ERR_DENIED)
T
Trond Myklebust 已提交
3319
		return decode_lock_denied(xdr, res->denied);
L
Linus Torvalds 已提交
3320 3321 3322
	return status;
}

T
Trond Myklebust 已提交
3323
static int decode_locku(struct xdr_stream *xdr, struct nfs_locku_res *res)
L
Linus Torvalds 已提交
3324
{
A
Al Viro 已提交
3325
	__be32 *p;
L
Linus Torvalds 已提交
3326 3327 3328
	int status;

	status = decode_op_hdr(xdr, OP_LOCKU);
3329 3330
	if (status != -EIO)
		nfs_increment_lock_seqid(status, res->seqid);
L
Linus Torvalds 已提交
3331
	if (status == 0) {
3332 3333
		READ_BUF(NFS4_STATEID_SIZE);
		COPYMEM(res->stateid.data, NFS4_STATEID_SIZE);
L
Linus Torvalds 已提交
3334 3335 3336 3337 3338 3339 3340 3341 3342 3343 3344 3345
	}
	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
Al Viro 已提交
3346
        __be32 *p;
L
Linus Torvalds 已提交
3347 3348 3349 3350 3351 3352 3353 3354 3355 3356 3357 3358 3359 3360 3361 3362 3363 3364
	uint32_t limit_type, nblocks, blocksize;

	READ_BUF(12);
	READ32(limit_type);
	switch (limit_type) {
		case 1:
			READ64(*maxsize);
			break;
		case 2:
			READ32(nblocks);
			READ32(blocksize);
			*maxsize = (uint64_t)nblocks * (uint64_t)blocksize;
	}
	return 0;
}

static int decode_delegation(struct xdr_stream *xdr, struct nfs_openres *res)
{
A
Al Viro 已提交
3365
        __be32 *p;
L
Linus Torvalds 已提交
3366 3367 3368 3369 3370 3371 3372 3373
        uint32_t delegation_type;

	READ_BUF(4);
	READ32(delegation_type);
	if (delegation_type == NFS4_OPEN_DELEGATE_NONE) {
		res->delegation_type = 0;
		return 0;
	}
3374 3375
	READ_BUF(NFS4_STATEID_SIZE+4);
	COPYMEM(res->delegation.data, NFS4_STATEID_SIZE);
L
Linus Torvalds 已提交
3376 3377 3378 3379 3380 3381 3382 3383 3384 3385
	READ32(res->do_recall);
	switch (delegation_type) {
		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)
				return -EIO;
	}
3386
	return decode_ace(xdr, NULL, res->server->nfs_client);
L
Linus Torvalds 已提交
3387 3388 3389 3390
}

static int decode_open(struct xdr_stream *xdr, struct nfs_openres *res)
{
A
Al Viro 已提交
3391
        __be32 *p;
3392
	uint32_t savewords, bmlen, i;
L
Linus Torvalds 已提交
3393 3394 3395
        int status;

        status = decode_op_hdr(xdr, OP_OPEN);
3396 3397
	if (status != -EIO)
		nfs_increment_open_seqid(status, res->seqid);
L
Linus Torvalds 已提交
3398 3399
        if (status)
                return status;
3400 3401
        READ_BUF(NFS4_STATEID_SIZE);
        COPYMEM(res->stateid.data, NFS4_STATEID_SIZE);
L
Linus Torvalds 已提交
3402 3403 3404 3405 3406 3407 3408 3409 3410 3411

        decode_change_info(xdr, &res->cinfo);

        READ_BUF(8);
        READ32(res->rflags);
        READ32(bmlen);
        if (bmlen > 10)
                goto xdr_error;

        READ_BUF(bmlen << 2);
3412 3413 3414 3415 3416 3417
	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
3418 3419
	return decode_delegation(xdr, res);
xdr_error:
3420
	dprintk("%s: Bitmap too large! Length = %u\n", __func__, bmlen);
L
Linus Torvalds 已提交
3421 3422 3423 3424 3425
	return -EIO;
}

static int decode_open_confirm(struct xdr_stream *xdr, struct nfs_open_confirmres *res)
{
A
Al Viro 已提交
3426
        __be32 *p;
L
Linus Torvalds 已提交
3427 3428 3429
	int status;

        status = decode_op_hdr(xdr, OP_OPEN_CONFIRM);
3430 3431
	if (status != -EIO)
		nfs_increment_open_seqid(status, res->seqid);
L
Linus Torvalds 已提交
3432 3433
        if (status)
                return status;
3434 3435
        READ_BUF(NFS4_STATEID_SIZE);
        COPYMEM(res->stateid.data, NFS4_STATEID_SIZE);
L
Linus Torvalds 已提交
3436 3437 3438 3439 3440
        return 0;
}

static int decode_open_downgrade(struct xdr_stream *xdr, struct nfs_closeres *res)
{
A
Al Viro 已提交
3441
	__be32 *p;
L
Linus Torvalds 已提交
3442 3443 3444
	int status;

	status = decode_op_hdr(xdr, OP_OPEN_DOWNGRADE);
3445 3446
	if (status != -EIO)
		nfs_increment_open_seqid(status, res->seqid);
L
Linus Torvalds 已提交
3447 3448
	if (status)
		return status;
3449 3450
	READ_BUF(NFS4_STATEID_SIZE);
	COPYMEM(res->stateid.data, NFS4_STATEID_SIZE);
L
Linus Torvalds 已提交
3451 3452 3453 3454 3455 3456 3457 3458 3459 3460 3461 3462 3463 3464 3465 3466
	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
3467
	__be32 *p;
L
Linus Torvalds 已提交
3468 3469 3470 3471 3472 3473 3474 3475 3476 3477 3478 3479
	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) {
3480
		dprintk("NFS: server cheating in read reply: "
L
Linus Torvalds 已提交
3481 3482 3483 3484 3485 3486 3487 3488 3489 3490 3491 3492 3493 3494 3495
				"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;
3496 3497
	size_t		hdrlen;
	u32		recvd, pglen = rcvbuf->page_len;
A
Al Viro 已提交
3498
	__be32		*end, *entry, *p, *kaddr;
3499
	unsigned int	nr = 0;
3500
	int		status;
L
Linus Torvalds 已提交
3501 3502 3503 3504 3505 3506

	status = decode_op_hdr(xdr, OP_READDIR);
	if (status)
		return status;
	READ_BUF(8);
	COPYMEM(readdir->verifier.data, 8);
3507 3508
	dprintk("%s: verifier = %08x:%08x\n",
			__func__,
3509 3510 3511
			((u32 *)readdir->verifier.data)[0],
			((u32 *)readdir->verifier.data)[1]);

L
Linus Torvalds 已提交
3512 3513 3514 3515 3516 3517 3518 3519

	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
3520
	kaddr = p = kmap_atomic(page, KM_USER0);
3521
	end = p + ((pglen + readdir->pgbase) >> 2);
L
Linus Torvalds 已提交
3522
	entry = p;
3523 3524 3525 3526 3527 3528

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

	for (; *p++; nr++) {
3529
		u32 len, attrlen, xlen;
3530
		if (end - p < 3)
L
Linus Torvalds 已提交
3531
			goto short_pkt;
3532
		dprintk("cookie = %Lu, ", *((unsigned long long *)p));
L
Linus Torvalds 已提交
3533 3534 3535
		p += 2;			/* cookie */
		len = ntohl(*p++);	/* filename length */
		if (len > NFS4_MAXNAMLEN) {
3536 3537
			dprintk("NFS: giant filename in readdir (len 0x%x)\n",
					len);
L
Linus Torvalds 已提交
3538 3539
			goto err_unmap;
		}
3540 3541
		xlen = XDR_QUADLEN(len);
		if (end - p < xlen + 1)
L
Linus Torvalds 已提交
3542
			goto short_pkt;
3543 3544
		dprintk("filename = %*s\n", len, (char *)p);
		p += xlen;
L
Linus Torvalds 已提交
3545
		len = ntohl(*p++);	/* bitmap length */
3546
		if (end - p < len + 1)
L
Linus Torvalds 已提交
3547
			goto short_pkt;
3548
		p += len;
L
Linus Torvalds 已提交
3549
		attrlen = XDR_QUADLEN(ntohl(*p++));
3550
		if (end - p < attrlen + 2)
L
Linus Torvalds 已提交
3551
			goto short_pkt;
3552
		p += attrlen;		/* attributes */
L
Linus Torvalds 已提交
3553 3554
		entry = p;
	}
3555 3556 3557 3558 3559 3560 3561 3562 3563
	/*
	 * 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;
	}
3564
out:
L
Linus Torvalds 已提交
3565 3566 3567
	kunmap_atomic(kaddr, KM_USER0);
	return 0;
short_pkt:
3568 3569 3570 3571 3572 3573 3574 3575 3576
	/*
	 * 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.
	 */
3577
	dprintk("%s: short packet at entry %d\n", __func__, nr);
L
Linus Torvalds 已提交
3578
	entry[0] = entry[1] = 0;
3579 3580
	if (nr)
		goto out;
L
Linus Torvalds 已提交
3581 3582 3583 3584 3585 3586 3587 3588 3589
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;
3590 3591
	size_t hdrlen;
	u32 len, recvd;
A
Al Viro 已提交
3592
	__be32 *p;
L
Linus Torvalds 已提交
3593 3594 3595 3596 3597 3598 3599 3600 3601 3602 3603
	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) {
3604
		dprintk("nfs: server returned giant symlink!\n");
L
Linus Torvalds 已提交
3605 3606 3607 3608 3609
		return -ENAMETOOLONG;
	}
	hdrlen = (char *) xdr->p - (char *) iov->iov_base;
	recvd = req->rq_rcv_buf.len - hdrlen;
	if (recvd < len) {
3610
		dprintk("NFS: server cheating in readlink reply: "
L
Linus Torvalds 已提交
3611 3612 3613 3614 3615 3616 3617 3618 3619 3620 3621 3622 3623 3624 3625 3626 3627 3628 3629 3630 3631 3632 3633 3634 3635 3636 3637 3638 3639 3640 3641 3642 3643 3644 3645 3646 3647 3648 3649 3650 3651 3652 3653 3654 3655 3656 3657 3658 3659
				"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);
}

3660 3661 3662 3663 3664 3665
static int
decode_restorefh(struct xdr_stream *xdr)
{
	return decode_op_hdr(xdr, OP_RESTOREFH);
}

3666 3667 3668
static int decode_getacl(struct xdr_stream *xdr, struct rpc_rqst *req,
		size_t *acl_len)
{
A
Al Viro 已提交
3669
	__be32 *savep;
3670 3671 3672 3673 3674 3675 3676 3677 3678 3679 3680 3681 3682 3683 3684 3685
	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)) {
3686 3687
		size_t hdrlen;
		u32 recvd;
3688 3689 3690 3691 3692 3693

		/* 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) {
3694
			dprintk("NFS: server cheating in getattr"
3695 3696 3697 3698
					" acl reply: attrlen %u > recvd %u\n",
					attrlen, recvd);
			return -EINVAL;
		}
3699
		xdr_read_pages(xdr, attrlen);
3700
		*acl_len = attrlen;
J
J. Bruce Fields 已提交
3701 3702
	} else
		status = -EOPNOTSUPP;
3703 3704 3705 3706 3707

out:
	return status;
}

L
Linus Torvalds 已提交
3708 3709 3710 3711 3712 3713 3714 3715
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
3716
	__be32 *p;
L
Linus Torvalds 已提交
3717 3718 3719 3720 3721 3722 3723 3724 3725 3726 3727 3728
	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;
}

3729
static int decode_setclientid(struct xdr_stream *xdr, struct nfs_client *clp)
L
Linus Torvalds 已提交
3730
{
A
Al Viro 已提交
3731
	__be32 *p;
L
Linus Torvalds 已提交
3732 3733 3734 3735 3736 3737
	uint32_t opnum;
	int32_t nfserr;

	READ_BUF(8);
	READ32(opnum);
	if (opnum != OP_SETCLIENTID) {
3738
		dprintk("nfs: decode_setclientid: Server returned operation"
3739
			" %d\n", opnum);
L
Linus Torvalds 已提交
3740 3741 3742 3743
		return -EIO;
	}
	READ32(nfserr);
	if (nfserr == NFS_OK) {
3744
		READ_BUF(8 + NFS4_VERIFIER_SIZE);
L
Linus Torvalds 已提交
3745
		READ64(clp->cl_clientid);
3746
		COPYMEM(clp->cl_confirm.data, NFS4_VERIFIER_SIZE);
L
Linus Torvalds 已提交
3747 3748 3749 3750 3751 3752 3753 3754 3755 3756 3757 3758 3759 3760
	} 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
3761
		return nfs4_stat_to_errno(nfserr);
L
Linus Torvalds 已提交
3762 3763 3764 3765 3766 3767 3768 3769 3770 3771 3772

	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
3773
	__be32 *p;
L
Linus Torvalds 已提交
3774 3775 3776 3777 3778 3779 3780 3781 3782 3783 3784 3785 3786 3787 3788 3789 3790 3791 3792 3793 3794
	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);
}

/*
 * Decode OPEN_DOWNGRADE response
 */
A
Al Viro 已提交
3795
static int nfs4_xdr_dec_open_downgrade(struct rpc_rqst *rqstp, __be32 *p, struct nfs_closeres *res)
L
Linus Torvalds 已提交
3796 3797 3798 3799 3800 3801 3802 3803 3804 3805 3806 3807 3808
{
        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);
3809 3810 3811
	if (status != 0)
		goto out;
	decode_getfattr(&xdr, res->fattr, res->server);
L
Linus Torvalds 已提交
3812 3813 3814 3815 3816 3817 3818 3819 3820 3821 3822
out:
        return status;
}

/*
 * END OF "GENERIC" DECODE ROUTINES.
 */

/*
 * Decode ACCESS response
 */
A
Al Viro 已提交
3823
static int nfs4_xdr_dec_access(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_accessres *res)
L
Linus Torvalds 已提交
3824 3825 3826 3827
{
	struct xdr_stream xdr;
	struct compound_hdr hdr;
	int status;
3828

L
Linus Torvalds 已提交
3829 3830 3831
	xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
	if ((status = decode_compound_hdr(&xdr, &hdr)) != 0)
		goto out;
3832 3833 3834 3835 3836 3837 3838
	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
3839 3840 3841 3842 3843 3844 3845
out:
	return status;
}

/*
 * Decode LOOKUP response
 */
A
Al Viro 已提交
3846
static int nfs4_xdr_dec_lookup(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_lookup_res *res)
L
Linus Torvalds 已提交
3847 3848 3849 3850
{
	struct xdr_stream xdr;
	struct compound_hdr hdr;
	int status;
3851

L
Linus Torvalds 已提交
3852 3853 3854 3855 3856 3857 3858 3859 3860 3861 3862 3863 3864 3865 3866 3867 3868
	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
3869
static int nfs4_xdr_dec_lookup_root(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_lookup_res *res)
L
Linus Torvalds 已提交
3870 3871 3872 3873
{
	struct xdr_stream xdr;
	struct compound_hdr hdr;
	int status;
3874

L
Linus Torvalds 已提交
3875 3876 3877 3878 3879 3880 3881 3882 3883 3884 3885 3886 3887 3888
	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
 */
3889
static int nfs4_xdr_dec_remove(struct rpc_rqst *rqstp, __be32 *p, struct nfs_removeres *res)
L
Linus Torvalds 已提交
3890 3891 3892 3893
{
	struct xdr_stream xdr;
	struct compound_hdr hdr;
	int status;
3894

L
Linus Torvalds 已提交
3895 3896 3897
	xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
	if ((status = decode_compound_hdr(&xdr, &hdr)) != 0)
		goto out;
3898 3899 3900 3901
	if ((status = decode_putfh(&xdr)) != 0)
		goto out;
	if ((status = decode_remove(&xdr, &res->cinfo)) != 0)
		goto out;
3902
	decode_getfattr(&xdr, &res->dir_attr, res->server);
L
Linus Torvalds 已提交
3903 3904 3905 3906 3907 3908 3909
out:
	return status;
}

/*
 * Decode RENAME response
 */
A
Al Viro 已提交
3910
static int nfs4_xdr_dec_rename(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_rename_res *res)
L
Linus Torvalds 已提交
3911 3912 3913 3914
{
	struct xdr_stream xdr;
	struct compound_hdr hdr;
	int status;
3915

L
Linus Torvalds 已提交
3916 3917 3918 3919 3920 3921 3922 3923 3924
	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;
3925 3926 3927 3928 3929 3930 3931 3932
	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
3933 3934 3935 3936 3937 3938 3939
out:
	return status;
}

/*
 * Decode LINK response
 */
A
Al Viro 已提交
3940
static int nfs4_xdr_dec_link(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_link_res *res)
L
Linus Torvalds 已提交
3941 3942 3943 3944
{
	struct xdr_stream xdr;
	struct compound_hdr hdr;
	int status;
3945

L
Linus Torvalds 已提交
3946 3947 3948 3949 3950 3951 3952 3953 3954
	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;
3955 3956 3957 3958 3959 3960 3961 3962 3963 3964 3965
	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
3966 3967 3968 3969 3970 3971 3972
out:
	return status;
}

/*
 * Decode CREATE response
 */
A
Al Viro 已提交
3973
static int nfs4_xdr_dec_create(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_create_res *res)
L
Linus Torvalds 已提交
3974 3975 3976 3977
{
	struct xdr_stream xdr;
	struct compound_hdr hdr;
	int status;
3978

L
Linus Torvalds 已提交
3979 3980 3981 3982 3983
	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;
3984 3985
	if ((status = decode_savefh(&xdr)) != 0)
		goto out;
L
Linus Torvalds 已提交
3986 3987 3988 3989
	if ((status = decode_create(&xdr,&res->dir_cinfo)) != 0)
		goto out;
	if ((status = decode_getfh(&xdr, res->fh)) != 0)
		goto out;
3990 3991 3992 3993 3994
	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
3995 3996 3997 3998 3999 4000 4001
out:
	return status;
}

/*
 * Decode SYMLINK response
 */
A
Al Viro 已提交
4002
static int nfs4_xdr_dec_symlink(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_create_res *res)
L
Linus Torvalds 已提交
4003 4004 4005 4006 4007 4008 4009
{
	return nfs4_xdr_dec_create(rqstp, p, res);
}

/*
 * Decode GETATTR response
 */
A
Al Viro 已提交
4010
static int nfs4_xdr_dec_getattr(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_getattr_res *res)
L
Linus Torvalds 已提交
4011 4012 4013 4014
{
	struct xdr_stream xdr;
	struct compound_hdr hdr;
	int status;
4015

L
Linus Torvalds 已提交
4016 4017 4018 4019 4020 4021 4022 4023 4024 4025 4026 4027 4028
	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;

}

4029 4030 4031 4032
/*
 * Encode an SETACL request
 */
static int
A
Al Viro 已提交
4033
nfs4_xdr_enc_setacl(struct rpc_rqst *req, __be32 *p, struct nfs_setaclargs *args)
4034 4035 4036 4037 4038 4039 4040 4041 4042 4043 4044 4045 4046 4047 4048 4049 4050 4051 4052 4053
{
        struct xdr_stream xdr;
        struct compound_hdr hdr = {
                .nops   = 2,
        };
        int status;

        xdr_init_encode(&xdr, &req->rq_snd_buf, p);
        encode_compound_hdr(&xdr, &hdr);
        status = encode_putfh(&xdr, args->fh);
        if (status)
                goto out;
        status = encode_setacl(&xdr, args);
out:
        return status;
}
/*
 * Decode SETACL response
 */
static int
A
Al Viro 已提交
4054
nfs4_xdr_dec_setacl(struct rpc_rqst *rqstp, __be32 *p, void *res)
4055 4056 4057 4058 4059 4060 4061 4062 4063 4064 4065 4066 4067 4068 4069 4070
{
	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
4071

4072 4073 4074 4075
/*
 * Decode GETACL response
 */
static int
A
Al Viro 已提交
4076
nfs4_xdr_dec_getacl(struct rpc_rqst *rqstp, __be32 *p, size_t *acl_len)
4077 4078 4079 4080 4081 4082 4083 4084 4085 4086 4087 4088 4089 4090 4091 4092 4093 4094
{
	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
4095 4096 4097
/*
 * Decode CLOSE response
 */
A
Al Viro 已提交
4098
static int nfs4_xdr_dec_close(struct rpc_rqst *rqstp, __be32 *p, struct nfs_closeres *res)
L
Linus Torvalds 已提交
4099 4100 4101 4102 4103 4104 4105 4106 4107 4108 4109 4110 4111
{
        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);
4112 4113 4114 4115 4116 4117 4118 4119 4120
	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
4121 4122 4123 4124 4125 4126 4127
out:
        return status;
}

/*
 * Decode OPEN response
 */
A
Al Viro 已提交
4128
static int nfs4_xdr_dec_open(struct rpc_rqst *rqstp, __be32 *p, struct nfs_openres *res)
L
Linus Torvalds 已提交
4129 4130 4131 4132 4133 4134 4135 4136 4137 4138 4139 4140
{
        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;
4141 4142 4143
        status = decode_savefh(&xdr);
	if (status)
		goto out;
L
Linus Torvalds 已提交
4144 4145 4146
        status = decode_open(&xdr, res);
        if (status)
                goto out;
4147
	if (decode_getfh(&xdr, &res->fh) != 0)
L
Linus Torvalds 已提交
4148
		goto out;
4149 4150
	if (decode_getfattr(&xdr, res->f_attr, res->server) != 0)
		goto out;
4151
	if (decode_restorefh(&xdr) != 0)
4152 4153
		goto out;
	decode_getfattr(&xdr, res->dir_attr, res->server);
L
Linus Torvalds 已提交
4154 4155 4156 4157 4158 4159 4160
out:
        return status;
}

/*
 * Decode OPEN_CONFIRM response
 */
A
Al Viro 已提交
4161
static int nfs4_xdr_dec_open_confirm(struct rpc_rqst *rqstp, __be32 *p, struct nfs_open_confirmres *res)
L
Linus Torvalds 已提交
4162 4163 4164 4165 4166 4167 4168 4169 4170 4171 4172 4173 4174 4175 4176 4177 4178 4179 4180 4181
{
        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);
out:
        return status;
}

/*
 * Decode OPEN response
 */
A
Al Viro 已提交
4182
static int nfs4_xdr_dec_open_noattr(struct rpc_rqst *rqstp, __be32 *p, struct nfs_openres *res)
L
Linus Torvalds 已提交
4183 4184 4185 4186 4187 4188 4189 4190 4191 4192 4193 4194 4195
{
        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);
4196 4197 4198
        if (status)
                goto out;
	decode_getfattr(&xdr, res->f_attr, res->server);
L
Linus Torvalds 已提交
4199 4200 4201 4202 4203 4204 4205
out:
        return status;
}

/*
 * Decode SETATTR response
 */
A
Al Viro 已提交
4206
static int nfs4_xdr_dec_setattr(struct rpc_rqst *rqstp, __be32 *p, struct nfs_setattrres *res)
L
Linus Torvalds 已提交
4207 4208 4209 4210 4211 4212 4213 4214 4215 4216 4217 4218 4219 4220 4221 4222 4223 4224 4225 4226 4227 4228 4229 4230 4231
{
        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;
	status = decode_getfattr(&xdr, res->fattr, res->server);
	if (status == NFS4ERR_DELAY)
		status = 0;
out:
        return status;
}

/*
 * Decode LOCK response
 */
A
Al Viro 已提交
4232
static int nfs4_xdr_dec_lock(struct rpc_rqst *rqstp, __be32 *p, struct nfs_lock_res *res)
L
Linus Torvalds 已提交
4233 4234 4235 4236 4237 4238 4239 4240 4241 4242 4243 4244 4245 4246 4247 4248 4249 4250 4251 4252
{
	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
4253
static int nfs4_xdr_dec_lockt(struct rpc_rqst *rqstp, __be32 *p, struct nfs_lockt_res *res)
L
Linus Torvalds 已提交
4254 4255 4256 4257 4258 4259 4260 4261 4262 4263 4264 4265 4266 4267 4268 4269 4270 4271 4272 4273
{
	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
4274
static int nfs4_xdr_dec_locku(struct rpc_rqst *rqstp, __be32 *p, struct nfs_locku_res *res)
L
Linus Torvalds 已提交
4275 4276 4277 4278 4279 4280 4281 4282 4283 4284 4285 4286 4287 4288 4289 4290 4291 4292 4293 4294
{
	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
4295
static int nfs4_xdr_dec_readlink(struct rpc_rqst *rqstp, __be32 *p, void *res)
L
Linus Torvalds 已提交
4296 4297 4298 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, &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
4316
static int nfs4_xdr_dec_readdir(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_readdir_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 4335 4336
{
	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
4337
static int nfs4_xdr_dec_read(struct rpc_rqst *rqstp, __be32 *p, struct nfs_readres *res)
L
Linus Torvalds 已提交
4338 4339 4340 4341 4342 4343 4344 4345 4346 4347 4348 4349 4350 4351 4352 4353 4354 4355 4356 4357 4358 4359
{
	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
4360
static int nfs4_xdr_dec_write(struct rpc_rqst *rqstp, __be32 *p, struct nfs_writeres *res)
L
Linus Torvalds 已提交
4361 4362 4363 4364 4365 4366 4367 4368 4369 4370 4371 4372 4373
{
	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);
4374 4375 4376
	if (status)
		goto out;
	decode_getfattr(&xdr, res->fattr, res->server);
L
Linus Torvalds 已提交
4377 4378 4379 4380 4381 4382 4383 4384 4385
	if (!status)
		status = res->count;
out:
	return status;
}

/*
 * Decode COMMIT response
 */
A
Al Viro 已提交
4386
static int nfs4_xdr_dec_commit(struct rpc_rqst *rqstp, __be32 *p, struct nfs_writeres *res)
L
Linus Torvalds 已提交
4387 4388 4389 4390 4391 4392 4393 4394 4395 4396 4397 4398 4399
{
	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);
4400 4401 4402
	if (status)
		goto out;
	decode_getfattr(&xdr, res->fattr, res->server);
L
Linus Torvalds 已提交
4403 4404 4405 4406 4407 4408 4409
out:
	return status;
}

/*
 * FSINFO request
 */
A
Al Viro 已提交
4410
static int nfs4_xdr_dec_fsinfo(struct rpc_rqst *req, __be32 *p, struct nfs_fsinfo *fsinfo)
L
Linus Torvalds 已提交
4411 4412 4413 4414 4415 4416 4417 4418 4419 4420 4421 4422 4423 4424 4425 4426 4427
{
	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
4428
static int nfs4_xdr_dec_pathconf(struct rpc_rqst *req, __be32 *p, struct nfs_pathconf *pathconf)
L
Linus Torvalds 已提交
4429 4430 4431 4432 4433 4434 4435 4436 4437 4438 4439 4440 4441 4442 4443 4444 4445
{
	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
4446
static int nfs4_xdr_dec_statfs(struct rpc_rqst *req, __be32 *p, struct nfs_fsstat *fsstat)
L
Linus Torvalds 已提交
4447 4448 4449 4450 4451 4452 4453 4454 4455 4456 4457 4458 4459 4460 4461 4462 4463
{
	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
4464
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
4465 4466 4467 4468 4469 4470 4471 4472 4473 4474 4475 4476 4477 4478 4479 4480 4481 4482
{
	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
4483
static int nfs4_xdr_dec_renew(struct rpc_rqst *rqstp, __be32 *p, void *dummy)
L
Linus Torvalds 已提交
4484 4485 4486 4487 4488 4489 4490 4491 4492 4493 4494 4495 4496 4497 4498
{
	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
4499
static int nfs4_xdr_dec_setclientid(struct rpc_rqst *req, __be32 *p,
4500
		struct nfs_client *clp)
L
Linus Torvalds 已提交
4501 4502 4503 4504 4505 4506 4507 4508 4509 4510 4511 4512 4513 4514 4515
{
	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
4516
static int nfs4_xdr_dec_setclientid_confirm(struct rpc_rqst *req, __be32 *p, struct nfs_fsinfo *fsinfo)
L
Linus Torvalds 已提交
4517 4518 4519 4520 4521 4522 4523 4524 4525 4526 4527 4528 4529 4530 4531 4532 4533 4534 4535
{
	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
Al Viro 已提交
4536
static int nfs4_xdr_dec_delegreturn(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_delegreturnres *res)
L
Linus Torvalds 已提交
4537 4538 4539 4540 4541 4542 4543
{
	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);
4544 4545 4546 4547 4548 4549 4550 4551
	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
Linus Torvalds 已提交
4552 4553 4554
	return status;
}

4555 4556 4557
/*
 * FS_LOCATIONS request
 */
A
Al Viro 已提交
4558
static int nfs4_xdr_dec_fs_locations(struct rpc_rqst *req, __be32 *p, struct nfs4_fs_locations *res)
4559 4560 4561 4562 4563 4564 4565 4566 4567 4568 4569 4570 4571 4572 4573 4574 4575 4576 4577
{
	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;
}

4578
__be32 *nfs4_decode_dirent(__be32 *p, struct nfs_entry *entry, int plus)
L
Linus Torvalds 已提交
4579 4580 4581 4582 4583 4584 4585 4586 4587 4588 4589 4590 4591 4592 4593 4594 4595 4596 4597 4598 4599 4600 4601 4602 4603 4604 4605 4606 4607 4608 4609 4610 4611 4612
{
	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) {
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		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		},
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	{ 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
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						    * to be handled by a
						    * middle-layer.
						    */
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	{ -1,			-EIO		}
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};

/*
 * Convert an NFS error code to a local one.
 * This one is used jointly by NFSv2 and NFSv3.
 */
static int
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nfs4_stat_to_errno(int stat)
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{
	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. */
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		return -ESERVERFAULT;
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	}
	/* 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.
	 */
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	return -stat;
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}

#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,		\
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	.p_arglen = NFS4_##argtype##_sz,			\
	.p_replen = NFS4_##restype##_sz,			\
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	.p_statidx = NFSPROC4_CLNT_##proc,			\
	.p_name   = #proc,					\
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    }

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),
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  PROC(GETACL,		enc_getacl,	dec_getacl),
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  PROC(SETACL,		enc_setacl,	dec_setacl),
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  PROC(FS_LOCATIONS,	enc_fs_locations, dec_fs_locations),
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};

struct rpc_version		nfs_version4 = {
	.number			= 4,
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	.nrprocs		= ARRAY_SIZE(nfs4_procedures),
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	.procs			= nfs4_procedures
};

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