nfs4xdr.c 115.8 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>
 * 
 *  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

/* lock,open owner id: 
 * we currently use size 1 (u32) out of (NFS4_OPAQUE_LIMIT  >> 2)
 */
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#define open_owner_id_maxsz	(1 + 1)
#define lock_owner_id_maxsz	(1 + 1)
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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)
#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_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	(op_encode_hdr_maxsz + 2)
#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 + \
				4 /*server->ip_addr*/ + \
				1 /*Netid*/ + \
				6 /*uaddr*/ + \
				6 + (NFS4_VERIFIER_SIZE >> 2))
#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)
#define encode_createmode_maxsz	(1 + nfs4_fattr_maxsz)
#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)
#define decode_delegation_maxsz	(1 + XDR_QUADLEN(NFS4_STATEID_SIZE) + 1 + \
				decode_ace_maxsz)
#define decode_change_info_maxsz	(5)
#define decode_open_maxsz	(op_decode_hdr_maxsz + \
				XDR_QUADLEN(NFS4_STATEID_SIZE) + \
				decode_change_info_maxsz + 1 + \
				nfs4_fattr_bitmap_maxsz + \
				decode_delegation_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)
#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 + \
				2 + nfs4_name_maxsz + \
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				nfs4_fattr_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_delegreturn_maxsz (op_encode_hdr_maxsz + 4)
#define decode_delegreturn_maxsz (op_decode_hdr_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 + \
				op_encode_hdr_maxsz + 7)
#define NFS4_dec_read_sz	(compound_decode_hdr_maxsz + \
				decode_putfh_maxsz + \
				op_decode_hdr_maxsz + 2)
#define NFS4_enc_readlink_sz	(compound_encode_hdr_maxsz + \
				encode_putfh_maxsz + \
				op_encode_hdr_maxsz)
#define NFS4_dec_readlink_sz	(compound_decode_hdr_maxsz + \
				decode_putfh_maxsz + \
				op_decode_hdr_maxsz)
#define NFS4_enc_readdir_sz	(compound_encode_hdr_maxsz + \
				encode_putfh_maxsz + \
				op_encode_hdr_maxsz + 9)
#define NFS4_dec_readdir_sz	(compound_decode_hdr_maxsz + \
				decode_putfh_maxsz + \
				op_decode_hdr_maxsz + 2)
#define NFS4_enc_write_sz	(compound_encode_hdr_maxsz + \
				encode_putfh_maxsz + \
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				op_encode_hdr_maxsz + 8 + \
				encode_getattr_maxsz)
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#define NFS4_dec_write_sz	(compound_decode_hdr_maxsz + \
				decode_putfh_maxsz + \
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				op_decode_hdr_maxsz + 4 + \
				decode_getattr_maxsz)
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#define NFS4_enc_commit_sz	(compound_encode_hdr_maxsz + \
				encode_putfh_maxsz + \
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				op_encode_hdr_maxsz + 3 + \
				encode_getattr_maxsz)
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#define NFS4_dec_commit_sz	(compound_decode_hdr_maxsz + \
				decode_putfh_maxsz + \
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				op_decode_hdr_maxsz + 2 + \
				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 + \
                                op_encode_hdr_maxsz + 5)
#define NFS4_dec_open_confirm_sz        (compound_decode_hdr_maxsz + \
                                        decode_putfh_maxsz + \
                                        op_decode_hdr_maxsz + 4)
#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 + \
                                encode_putfh_maxsz + \
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                                op_encode_hdr_maxsz + 7 + \
				encode_getattr_maxsz)
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#define NFS4_dec_open_downgrade_sz \
				(compound_decode_hdr_maxsz + \
                                decode_putfh_maxsz + \
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                                op_decode_hdr_maxsz + 4 + \
				decode_getattr_maxsz)
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#define NFS4_enc_close_sz       (compound_encode_hdr_maxsz + \
                                encode_putfh_maxsz + \
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                                op_encode_hdr_maxsz + 5 + \
				encode_getattr_maxsz)
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#define NFS4_dec_close_sz       (compound_decode_hdr_maxsz + \
                                decode_putfh_maxsz + \
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                                op_decode_hdr_maxsz + 4 + \
				decode_getattr_maxsz)
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#define NFS4_enc_setattr_sz     (compound_encode_hdr_maxsz + \
                                encode_putfh_maxsz + \
                                op_encode_hdr_maxsz + 4 + \
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                                nfs4_fattr_maxsz + \
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                                encode_getattr_maxsz)
#define NFS4_dec_setattr_sz     (compound_decode_hdr_maxsz + \
                                decode_putfh_maxsz + \
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                                op_decode_hdr_maxsz + 3 + \
                                nfs4_fattr_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 + \
				encode_getattr_maxsz + \
				op_encode_hdr_maxsz + \
				1 + 1 + 2 + 2 + \
				1 + 4 + 1 + 2 + \
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				lock_owner_id_maxsz)
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#define NFS4_dec_lock_sz        (compound_decode_hdr_maxsz + \
				decode_putfh_maxsz + \
				decode_getattr_maxsz + \
				op_decode_hdr_maxsz + \
				2 + 2 + 1 + 2 + \
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				lock_owner_id_maxsz)
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#define NFS4_enc_lockt_sz       (compound_encode_hdr_maxsz + \
				encode_putfh_maxsz + \
				encode_getattr_maxsz + \
				op_encode_hdr_maxsz + \
				1 + 2 + 2 + 2 + \
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				lock_owner_id_maxsz)
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#define NFS4_dec_lockt_sz       (NFS4_dec_lock_sz)
#define NFS4_enc_locku_sz       (compound_encode_hdr_maxsz + \
				encode_putfh_maxsz + \
				encode_getattr_maxsz + \
				op_encode_hdr_maxsz + \
				1 + 1 + 4 + 2 + 2)
#define NFS4_dec_locku_sz       (compound_decode_hdr_maxsz + \
				decode_putfh_maxsz + \
				decode_getattr_maxsz + \
				op_decode_hdr_maxsz + 4)
#define NFS4_enc_access_sz	(compound_encode_hdr_maxsz + \
				encode_putfh_maxsz + \
				op_encode_hdr_maxsz + 1)
#define NFS4_dec_access_sz	(compound_decode_hdr_maxsz + \
				decode_putfh_maxsz + \
				op_decode_hdr_maxsz + 2)
#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 + \
				encode_getattr_maxsz)
#define NFS4_dec_statfs_sz	(compound_decode_hdr_maxsz + \
				decode_putfh_maxsz + \
				op_decode_hdr_maxsz + 12)
#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 + \
434 435
				decode_delegreturn_maxsz + \
				decode_getattr_maxsz)
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#define NFS4_enc_getacl_sz	(compound_encode_hdr_maxsz + \
				encode_putfh_maxsz + \
				encode_getattr_maxsz)
#define NFS4_dec_getacl_sz	(compound_decode_hdr_maxsz + \
				decode_putfh_maxsz + \
				op_decode_hdr_maxsz + \
				nfs4_fattr_bitmap_maxsz + 1)
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#define NFS4_enc_setacl_sz	(compound_encode_hdr_maxsz + \
				encode_putfh_maxsz + \
				op_encode_hdr_maxsz + 4 + \
				nfs4_fattr_bitmap_maxsz + 1)
#define NFS4_dec_setacl_sz	(compound_decode_hdr_maxsz + \
				decode_putfh_maxsz + \
				op_decode_hdr_maxsz + nfs4_fattr_bitmap_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);			\
	if (!p) printk("RESERVE_SPACE(%d) failed in function %s\n", (int) (nbytes), __FUNCTION__); \
	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) {
			printk(KERN_WARNING "nfs: couldn't resolve uid %d to string\n",
			       iap->ia_uid);
			/* 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) {
			printk(KERN_WARNING "nfs4: couldn't resolve gid %d to string\n",
			       iap->ia_gid);
			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);
	}
	
	/*
	 * Now we backfill the bitmap and the attribute buffer length.
	 */
	if (len != ((char *)p - (char *)q) + 4) {
		printk ("encode_attr: Attr length calculation error! %u != %Zu\n",
				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);
	
	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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        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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        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]);
}

771 772 773 774 775 776 777
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);
	
	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+20);
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		WRITE32(args->open_seqid->sequence->counter);
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		WRITEMEM(args->open_stateid->data, NFS4_STATEID_SIZE);
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		WRITE32(args->lock_seqid->sequence->counter);
		WRITE64(args->lock_owner.clientid);
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		WRITE32(4);
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		WRITE32(args->lock_owner.id);
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	}
	else {
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		RESERVE_SPACE(NFS4_STATEID_SIZE+4);
		WRITEMEM(args->lock_stateid->data, NFS4_STATEID_SIZE);
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		WRITE32(args->lock_seqid->sequence->counter);
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	}

	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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	RESERVE_SPACE(40);
	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);
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	WRITE32(4);
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	WRITE32(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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	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);
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	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;
}

static void encode_share_access(struct xdr_stream *xdr, int open_flags)
{
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	__be32 *p;
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	RESERVE_SPACE(8);
	switch (open_flags & (FMODE_READ|FMODE_WRITE)) {
		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:
			BUG();
	}
	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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 /*
 * opcode 4, seqid 4, share_access 4, share_deny 4, clientid 8, ownerlen 4,
 * owner 4 = 32
 */
	RESERVE_SPACE(8);
	WRITE32(OP_OPEN);
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	WRITE32(arg->seqid->sequence->counter);
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	encode_share_access(xdr, arg->open_flags);
	RESERVE_SPACE(16);
	WRITE64(arg->clientid);
	WRITE32(4);
	WRITE32(arg->id);
}

static inline void encode_createmode(struct xdr_stream *xdr, const struct nfs_openargs *arg)
{
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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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	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);
	}
}

static inline void encode_delegation_type(struct xdr_stream *xdr, int delegation_type)
{
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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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	RESERVE_SPACE(4);
	WRITE32(NFS4_OPEN_CLAIM_NULL);
	encode_string(xdr, name->len, name->name);
}

static inline void encode_claim_previous(struct xdr_stream *xdr, int type)
{
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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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1003
	RESERVE_SPACE(4+NFS4_STATEID_SIZE);
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	WRITE32(NFS4_OPEN_CLAIM_DELEGATE_CUR);
1005
	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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1033
	RESERVE_SPACE(4+NFS4_STATEID_SIZE+4);
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	WRITE32(OP_OPEN_CONFIRM);
1035
	WRITEMEM(arg->stateid->data, NFS4_STATEID_SIZE);
1036
	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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1045
	RESERVE_SPACE(4+NFS4_STATEID_SIZE+4);
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	WRITE32(OP_OPEN_DOWNGRADE);
1047
	WRITEMEM(arg->stateid->data, NFS4_STATEID_SIZE);
1048
	WRITE32(arg->seqid->sequence->counter);
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	encode_share_access(xdr, arg->open_flags);
	return 0;
}

static int
encode_putfh(struct xdr_stream *xdr, const struct nfs_fh *fh)
{
	int len = fh->size;
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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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        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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1082
	RESERVE_SPACE(NFS4_STATEID_SIZE);
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	if (ctx->state != NULL) {
		nfs4_copy_stateid(&stateid, ctx->state, ctx->lockowner);
1085
		WRITEMEM(stateid.data, NFS4_STATEID_SIZE);
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	} else
1087
		WRITEMEM(zero_stateid.data, NFS4_STATEID_SIZE);
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}

static int encode_read(struct xdr_stream *xdr, const struct nfs_readargs *args)
{
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	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)
{
1108
	struct rpc_auth *auth = req->rq_task->tk_msg.rpc_cred->cr_auth;
1109 1110 1111 1112
	uint32_t attrs[2] = {
		FATTR4_WORD0_RDATTR_ERROR|FATTR4_WORD0_FILEID,
		FATTR4_WORD1_MOUNTED_ON_FILEID,
	};
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	int replen;
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	__be32 *p;
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1116
	RESERVE_SPACE(12+NFS4_VERIFIER_SIZE+20);
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	WRITE32(OP_READDIR);
	WRITE64(readdir->cookie);
1119
	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);
1123 1124 1125 1126 1127 1128 1129
	/* 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]);
1130 1131 1132 1133 1134 1135 1136
	dprintk("%s: cookie = %Lu, verifier = 0x%x%x, bitmap = 0x%x%x\n",
			__FUNCTION__,
			(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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	/* set up reply kvec
	 *    toplevel_status + taglen + rescount + OP_PUTFH + status
	 *      + OP_READDIR + status + verifer(2)  = 9
	 */
	replen = (RPC_REPHDRSIZE + auth->au_rslack + 9) << 2;
	xdr_inline_pages(&req->rq_rcv_buf, replen, readdir->pages,
			 readdir->pgbase, readdir->count);
1145 1146 1147
	dprintk("%s: inlined page args = (%u, %p, %u, %u)\n",
			__FUNCTION__, replen, readdir->pages,
			readdir->pgbase, readdir->count);
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	return 0;
}

static int encode_readlink(struct xdr_stream *xdr, const struct nfs4_readlink *readlink, struct rpc_rqst *req)
{
1154
	struct rpc_auth *auth = req->rq_task->tk_msg.rpc_cred->cr_auth;
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	unsigned int replen;
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	__be32 *p;
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	RESERVE_SPACE(4);
	WRITE32(OP_READLINK);

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

static int encode_remove(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_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)
{
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	__be32 *p;
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	RESERVE_SPACE(8 + oldname->len);
	WRITE32(OP_RENAME);
	WRITE32(oldname->len);
	WRITEMEM(oldname->name, oldname->len);
	
	RESERVE_SPACE(4 + newname->len);
	WRITE32(newname->len);
	WRITEMEM(newname->name, newname->len);

	return 0;
}

1200
static int encode_renew(struct xdr_stream *xdr, const struct nfs_client *client_stateid)
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{
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	__be32 *p;
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	RESERVE_SPACE(12);
	WRITE32(OP_RENEW);
	WRITE64(client_stateid->cl_clientid);

	return 0;
}

1211 1212 1213
static int
encode_restorefh(struct xdr_stream *xdr)
{
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	__be32 *p;
1215 1216 1217 1218 1219 1220 1221

	RESERVE_SPACE(4);
	WRITE32(OP_RESTOREFH);

	return 0;
}

1222 1223 1224
static int
encode_setacl(struct xdr_stream *xdr, struct nfs_setaclargs *arg)
{
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	__be32 *p;
1226

1227
	RESERVE_SPACE(4+NFS4_STATEID_SIZE);
1228
	WRITE32(OP_SETATTR);
1229
	WRITEMEM(zero_stateid.data, NFS4_STATEID_SIZE);
1230 1231 1232 1233 1234 1235 1236 1237 1238 1239 1240
	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)
{
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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;
L
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1257
        RESERVE_SPACE(4+NFS4_STATEID_SIZE);
L
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        WRITE32(OP_SETATTR);
1259
	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)
{
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	__be32 *p;
L
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1271
	RESERVE_SPACE(4 + NFS4_VERIFIER_SIZE);
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	WRITE32(OP_SETCLIENTID);
1273
	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;
}

1286
static int encode_setclientid_confirm(struct xdr_stream *xdr, const struct nfs_client *client_state)
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{
A
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        __be32 *p;
L
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1289

1290
        RESERVE_SPACE(12 + NFS4_VERIFIER_SIZE);
L
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        WRITE32(OP_SETCLIENTID_CONFIRM);
        WRITE64(client_state->cl_clientid);
1293
        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;
L
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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;
L
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1321
	RESERVE_SPACE(4+NFS4_STATEID_SIZE);
L
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	WRITE32(OP_DELEGRETURN);
1324
	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 = {
		.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_access(&xdr, args->access);
	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
 */
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static int nfs4_xdr_enc_lookup_root(struct rpc_rqst *req, __be32 *p, const struct nfs4_lookup_root_arg *args)
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{
	struct xdr_stream xdr;
	struct compound_hdr hdr = {
		.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
 */
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static int nfs4_xdr_enc_remove(struct rpc_rqst *req, __be32 *p, const struct nfs4_remove_arg *args)
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{
	struct xdr_stream xdr;
	struct compound_hdr hdr = {
1402
		.nops = 3,
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	};
	int status;

	xdr_init_encode(&xdr, &req->rq_snd_buf, p);
	encode_compound_hdr(&xdr, &hdr);
1408 1409 1410 1411 1412 1413
	if ((status = encode_putfh(&xdr, args->fh)) != 0)
		goto out;
	if ((status = encode_remove(&xdr, args->name)) != 0)
		goto out;
	status = encode_getfattr(&xdr, args->bitmask);
out:
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	return status;
}

/*
 * Encode RENAME request
 */
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static int nfs4_xdr_enc_rename(struct rpc_rqst *req, __be32 *p, const struct nfs4_rename_arg *args)
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{
	struct xdr_stream xdr;
	struct compound_hdr hdr = {
1424
		.nops = 7,
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	};
	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;
1436 1437 1438 1439 1440 1441 1442
	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);
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out:
	return status;
}

/*
 * Encode LINK request
 */
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static int nfs4_xdr_enc_link(struct rpc_rqst *req, __be32 *p, const struct nfs4_link_arg *args)
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{
	struct xdr_stream xdr;
	struct compound_hdr hdr = {
1454
		.nops = 7,
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	};
	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;
1466 1467 1468 1469 1470 1471 1472
	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);
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out:
	return status;
}

/*
 * Encode CREATE request
 */
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static int nfs4_xdr_enc_create(struct rpc_rqst *req, __be32 *p, const struct nfs4_create_arg *args)
L
Linus Torvalds 已提交
1481 1482 1483
{
	struct xdr_stream xdr;
	struct compound_hdr hdr = {
1484
		.nops = 7,
L
Linus Torvalds 已提交
1485 1486 1487 1488 1489 1490 1491
	};
	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;
1492 1493
	if ((status = encode_savefh(&xdr)) != 0)
		goto out;
L
Linus Torvalds 已提交
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	if ((status = encode_create(&xdr, args)) != 0)
		goto out;
	if ((status = encode_getfh(&xdr)) != 0)
		goto out;
1498 1499 1500 1501
	if ((status = encode_getfattr(&xdr, args->bitmask)) != 0)
		goto out;
	if ((status = encode_restorefh(&xdr)) != 0)
		goto out;
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	status = encode_getfattr(&xdr, args->bitmask);
out:
	return status;
}

/*
 * Encode SYMLINK request
 */
A
Al Viro 已提交
1510
static int nfs4_xdr_enc_symlink(struct rpc_rqst *req, __be32 *p, const struct nfs4_create_arg *args)
L
Linus Torvalds 已提交
1511 1512 1513 1514 1515 1516 1517
{
	return nfs4_xdr_enc_create(req, p, args);
}

/*
 * Encode GETATTR request
 */
A
Al Viro 已提交
1518
static int nfs4_xdr_enc_getattr(struct rpc_rqst *req, __be32 *p, const struct nfs4_getattr_arg *args)
L
Linus Torvalds 已提交
1519 1520 1521 1522 1523 1524 1525 1526 1527 1528 1529 1530 1531 1532 1533 1534 1535
{
	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
1536
static int nfs4_xdr_enc_close(struct rpc_rqst *req, __be32 *p, struct nfs_closeargs *args)
L
Linus Torvalds 已提交
1537 1538 1539
{
        struct xdr_stream xdr;
        struct compound_hdr hdr = {
1540
                .nops   = 3,
L
Linus Torvalds 已提交
1541 1542 1543 1544 1545 1546 1547 1548 1549
        };
        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);
1550 1551 1552
	if (status != 0)
		goto out;
	status = encode_getfattr(&xdr, args->bitmask);
L
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out:
        return status;
}

/*
 * Encode an OPEN request
 */
A
Al Viro 已提交
1560
static int nfs4_xdr_enc_open(struct rpc_rqst *req, __be32 *p, struct nfs_openargs *args)
L
Linus Torvalds 已提交
1561 1562 1563
{
	struct xdr_stream xdr;
	struct compound_hdr hdr = {
1564
		.nops = 7,
L
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1565 1566 1567 1568 1569 1570
	};
	int status;

	xdr_init_encode(&xdr, &req->rq_snd_buf, p);
	encode_compound_hdr(&xdr, &hdr);
	status = encode_putfh(&xdr, args->fh);
1571 1572 1573
	if (status)
		goto out;
	status = encode_savefh(&xdr);
L
Linus Torvalds 已提交
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	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);
1583 1584 1585 1586 1587 1588
	if (status)
		goto out;
	status = encode_restorefh(&xdr);
	if (status)
		goto out;
	status = encode_getfattr(&xdr, args->bitmask);
L
Linus Torvalds 已提交
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out:
	return status;
}

/*
 * Encode an OPEN_CONFIRM request
 */
A
Al Viro 已提交
1596
static int nfs4_xdr_enc_open_confirm(struct rpc_rqst *req, __be32 *p, struct nfs_open_confirmargs *args)
L
Linus Torvalds 已提交
1597 1598 1599 1600 1601 1602 1603 1604 1605 1606 1607 1608 1609 1610 1611 1612 1613 1614 1615 1616
{
	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
1617
static int nfs4_xdr_enc_open_noattr(struct rpc_rqst *req, __be32 *p, struct nfs_openargs *args)
L
Linus Torvalds 已提交
1618 1619 1620
{
	struct xdr_stream xdr;
	struct compound_hdr hdr = {
1621
		.nops   = 3,
L
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1622 1623 1624 1625 1626 1627 1628 1629 1630
	};
	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);
1631 1632 1633
	if (status)
		goto out;
	status = encode_getfattr(&xdr, args->bitmask);
L
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1634 1635 1636 1637 1638 1639 1640
out:
	return status;
}

/*
 * Encode an OPEN_DOWNGRADE request
 */
A
Al Viro 已提交
1641
static int nfs4_xdr_enc_open_downgrade(struct rpc_rqst *req, __be32 *p, struct nfs_closeargs *args)
L
Linus Torvalds 已提交
1642 1643 1644
{
	struct xdr_stream xdr;
	struct compound_hdr hdr = {
1645
		.nops	= 3,
L
Linus Torvalds 已提交
1646 1647 1648 1649 1650 1651 1652 1653 1654
	};
	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);
1655 1656 1657
	if (status != 0)
		goto out;
	status = encode_getfattr(&xdr, args->bitmask);
L
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out:
	return status;
}

/*
 * Encode a LOCK request
 */
A
Al Viro 已提交
1665
static int nfs4_xdr_enc_lock(struct rpc_rqst *req, __be32 *p, struct nfs_lock_args *args)
L
Linus Torvalds 已提交
1666 1667 1668 1669 1670 1671 1672 1673 1674 1675 1676 1677 1678 1679 1680 1681 1682 1683 1684 1685
{
	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
1686
static int nfs4_xdr_enc_lockt(struct rpc_rqst *req, __be32 *p, struct nfs_lockt_args *args)
L
Linus Torvalds 已提交
1687 1688 1689 1690 1691 1692 1693 1694 1695 1696 1697 1698 1699 1700 1701 1702 1703 1704 1705 1706
{
	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
1707
static int nfs4_xdr_enc_locku(struct rpc_rqst *req, __be32 *p, struct nfs_locku_args *args)
L
Linus Torvalds 已提交
1708 1709 1710 1711 1712 1713 1714 1715 1716 1717 1718 1719 1720 1721 1722 1723 1724 1725 1726 1727
{
	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
1728
static int nfs4_xdr_enc_readlink(struct rpc_rqst *req, __be32 *p, const struct nfs4_readlink *args)
L
Linus Torvalds 已提交
1729 1730 1731 1732 1733 1734 1735 1736 1737 1738 1739 1740 1741 1742 1743 1744 1745 1746 1747 1748
{
	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_readlink(&xdr, args, req);
out:
	return status;
}

/*
 * Encode a READDIR request
 */
A
Al Viro 已提交
1749
static int nfs4_xdr_enc_readdir(struct rpc_rqst *req, __be32 *p, const struct nfs4_readdir_arg *args)
L
Linus Torvalds 已提交
1750 1751 1752 1753 1754 1755 1756 1757 1758 1759 1760 1761 1762 1763 1764 1765 1766 1767 1768 1769
{
	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_readdir(&xdr, args, req);
out:
	return status;
}

/*
 * Encode a READ request
 */
A
Al Viro 已提交
1770
static int nfs4_xdr_enc_read(struct rpc_rqst *req, __be32 *p, struct nfs_readargs *args)
L
Linus Torvalds 已提交
1771
{
1772
	struct rpc_auth *auth = req->rq_task->tk_msg.rpc_cred->cr_auth;
L
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	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);
out:
	return status;
}

/*
 * Encode an SETATTR request
 */
A
Al Viro 已提交
1802
static int nfs4_xdr_enc_setattr(struct rpc_rqst *req, __be32 *p, struct nfs_setattrargs *args)
L
Linus Torvalds 已提交
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{
        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;
}

1824 1825 1826 1827
/*
 * Encode a GETACL request
 */
static int
A
Al Viro 已提交
1828
nfs4_xdr_enc_getacl(struct rpc_rqst *req, __be32 *p,
1829 1830 1831
		struct nfs_getaclargs *args)
{
	struct xdr_stream xdr;
1832
	struct rpc_auth *auth = req->rq_task->tk_msg.rpc_cred->cr_auth;
1833 1834 1835 1836 1837 1838 1839 1840 1841 1842 1843 1844 1845 1846 1847 1848 1849 1850 1851
	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
1852 1853 1854
/*
 * Encode a WRITE request
 */
A
Al Viro 已提交
1855
static int nfs4_xdr_enc_write(struct rpc_rqst *req, __be32 *p, struct nfs_writeargs *args)
L
Linus Torvalds 已提交
1856 1857 1858
{
	struct xdr_stream xdr;
	struct compound_hdr hdr = {
1859
		.nops = 3,
L
Linus Torvalds 已提交
1860 1861 1862 1863 1864 1865 1866 1867 1868
	};
	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);
1869 1870 1871
	if (status)
		goto out;
	status = encode_getfattr(&xdr, args->bitmask);
L
Linus Torvalds 已提交
1872 1873 1874 1875 1876 1877 1878
out:
	return status;
}

/*
 *  a COMMIT request
 */
A
Al Viro 已提交
1879
static int nfs4_xdr_enc_commit(struct rpc_rqst *req, __be32 *p, struct nfs_writeargs *args)
L
Linus Torvalds 已提交
1880 1881 1882
{
	struct xdr_stream xdr;
	struct compound_hdr hdr = {
1883
		.nops = 3,
L
Linus Torvalds 已提交
1884 1885 1886 1887 1888 1889 1890 1891 1892
	};
	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);
1893 1894 1895
	if (status)
		goto out;
	status = encode_getfattr(&xdr, args->bitmask);
L
Linus Torvalds 已提交
1896 1897 1898 1899 1900 1901 1902
out:
	return status;
}

/*
 * FSINFO request
 */
A
Al Viro 已提交
1903
static int nfs4_xdr_enc_fsinfo(struct rpc_rqst *req, __be32 *p, struct nfs4_fsinfo_arg *args)
L
Linus Torvalds 已提交
1904 1905 1906 1907 1908 1909 1910 1911 1912 1913 1914 1915 1916 1917 1918 1919 1920 1921
{
	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
1922
static int nfs4_xdr_enc_pathconf(struct rpc_rqst *req, __be32 *p, const struct nfs4_pathconf_arg *args)
L
Linus Torvalds 已提交
1923 1924 1925 1926 1927 1928 1929 1930 1931 1932 1933 1934 1935 1936 1937 1938 1939 1940 1941
{
	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
1942
static int nfs4_xdr_enc_statfs(struct rpc_rqst *req, __be32 *p, const struct nfs4_statfs_arg *args)
L
Linus Torvalds 已提交
1943 1944 1945 1946 1947 1948 1949 1950 1951 1952 1953 1954 1955 1956 1957 1958 1959 1960 1961 1962
{
	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
1963
static int nfs4_xdr_enc_server_caps(struct rpc_rqst *req, __be32 *p, const struct nfs_fh *fhandle)
L
Linus Torvalds 已提交
1964 1965 1966 1967 1968 1969 1970 1971 1972 1973 1974 1975 1976 1977 1978 1979 1980 1981 1982 1983 1984
{
	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
1985
static int nfs4_xdr_enc_renew(struct rpc_rqst *req, __be32 *p, struct nfs_client *clp)
L
Linus Torvalds 已提交
1986 1987 1988 1989 1990 1991 1992 1993 1994 1995 1996 1997 1998 1999
{
	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
2000
static int nfs4_xdr_enc_setclientid(struct rpc_rqst *req, __be32 *p, struct nfs4_setclientid *sc)
L
Linus Torvalds 已提交
2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014
{
	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
2015
static int nfs4_xdr_enc_setclientid_confirm(struct rpc_rqst *req, __be32 *p, struct nfs_client *clp)
L
Linus Torvalds 已提交
2016 2017 2018 2019 2020 2021 2022 2023 2024 2025 2026 2027 2028 2029 2030 2031 2032 2033 2034 2035 2036
{
	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
2037
static int nfs4_xdr_enc_delegreturn(struct rpc_rqst *req, __be32 *p, const struct nfs4_delegreturnargs *args)
L
Linus Torvalds 已提交
2038 2039 2040
{
	struct xdr_stream xdr;
	struct compound_hdr hdr = {
2041
		.nops = 3,
L
Linus Torvalds 已提交
2042 2043 2044 2045 2046
	};
	int status;

	xdr_init_encode(&xdr, &req->rq_snd_buf, p);
	encode_compound_hdr(&xdr, &hdr);
2047 2048 2049 2050 2051 2052 2053 2054
	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
2055 2056 2057
	return status;
}

2058 2059 2060
/*
 * Encode FS_LOCATIONS request
 */
A
Al Viro 已提交
2061
static int nfs4_xdr_enc_fs_locations(struct rpc_rqst *req, __be32 *p, struct nfs4_fs_locations_arg *args)
2062 2063 2064 2065 2066
{
	struct xdr_stream xdr;
	struct compound_hdr hdr = {
		.nops = 3,
	};
2067
	struct rpc_auth *auth = req->rq_task->tk_msg.rpc_cred->cr_auth;
2068 2069 2070 2071 2072 2073 2074 2075 2076
	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;
2077
	if ((status = encode_fs_locations(&xdr, args->bitmask)) != 0)
2078 2079
		goto out;
	/* set up reply
2080
	 *   toplevel_status + OP_PUTFH + status
2081 2082 2083 2084 2085 2086 2087 2088 2089
	 *   + 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
2090 2091 2092 2093 2094 2095 2096 2097 2098 2099 2100 2101 2102 2103 2104 2105 2106 2107 2108 2109 2110 2111 2112 2113 2114 2115 2116
/*
 * 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); \
2117 2118 2119 2120 2121
	if (unlikely(!p)) { \
		printk(KERN_INFO "%s: prematurely hit end of receive" \
				" buffer\n", __FUNCTION__); \
		printk(KERN_INFO "%s: xdr->p=%p, bytes=%u, xdr->end=%p\n", \
				__FUNCTION__, xdr->p, nbytes, xdr->end); \
L
Linus Torvalds 已提交
2122 2123 2124 2125
		return -EIO; \
	} \
} while (0)

2126
static int decode_opaque_inline(struct xdr_stream *xdr, unsigned int *len, char **string)
L
Linus Torvalds 已提交
2127
{
A
Al Viro 已提交
2128
	__be32 *p;
L
Linus Torvalds 已提交
2129 2130 2131 2132 2133 2134 2135 2136 2137 2138

	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
2139
	__be32 *p;
L
Linus Torvalds 已提交
2140 2141 2142 2143 2144 2145 2146 2147 2148 2149 2150 2151 2152 2153

	READ_BUF(8);
	READ32(hdr->status);
	READ32(hdr->taglen);
	
	READ_BUF(hdr->taglen + 4);
	hdr->tag = (char *)p;
	p += XDR_QUADLEN(hdr->taglen);
	READ32(hdr->nops);
	return 0;
}

static int decode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 expected)
{
A
Al Viro 已提交
2154
	__be32 *p;
L
Linus Torvalds 已提交
2155 2156 2157 2158 2159 2160 2161 2162 2163 2164 2165 2166 2167 2168
	uint32_t opnum;
	int32_t nfserr;

	READ_BUF(8);
	READ32(opnum);
	if (opnum != expected) {
		printk(KERN_NOTICE
				"nfs4_decode_op_hdr: Server returned operation"
			       	" %d but we issued a request for %d\n",
				opnum, expected);
		return -EIO;
	}
	READ32(nfserr);
	if (nfserr != NFS_OK)
2169
		return -nfs4_stat_to_errno(nfserr);
L
Linus Torvalds 已提交
2170 2171 2172 2173
	return 0;
}

/* Dummy routine */
2174
static int decode_ace(struct xdr_stream *xdr, void *ace, struct nfs_client *clp)
L
Linus Torvalds 已提交
2175
{
A
Al Viro 已提交
2176
	__be32 *p;
2177
	unsigned int strlen;
L
Linus Torvalds 已提交
2178 2179 2180 2181 2182 2183 2184 2185
	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
2186 2187
	uint32_t bmlen;
	__be32 *p;
L
Linus Torvalds 已提交
2188 2189 2190 2191 2192 2193 2194 2195 2196 2197 2198 2199 2200 2201

	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
2202
static inline int decode_attr_length(struct xdr_stream *xdr, uint32_t *attrlen, __be32 **savep)
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 2215 2216 2217 2218 2219 2220 2221 2222 2223 2224

	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;
	dprintk("%s: bitmask=0x%x%x\n", __FUNCTION__, bitmask[0], bitmask[1]);
	return 0;
}

static int decode_attr_type(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *type)
{
A
Al Viro 已提交
2225
	__be32 *p;
L
Linus Torvalds 已提交
2226 2227 2228 2229 2230 2231 2232 2233 2234 2235 2236 2237 2238 2239 2240 2241 2242 2243 2244

	*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) {
			dprintk("%s: bad type %d\n", __FUNCTION__, *type);
			return -EIO;
		}
		bitmap[0] &= ~FATTR4_WORD0_TYPE;
	}
	dprintk("%s: type=0%o\n", __FUNCTION__, nfs_type2fmt[*type].nfs2type);
	return 0;
}

static int decode_attr_change(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *change)
{
A
Al Viro 已提交
2245
	__be32 *p;
L
Linus Torvalds 已提交
2246 2247 2248 2249 2250 2251 2252 2253 2254 2255 2256 2257 2258 2259 2260 2261

	*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;
	}
	dprintk("%s: change attribute=%Lu\n", __FUNCTION__,
			(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
2262
	__be32 *p;
L
Linus Torvalds 已提交
2263 2264 2265 2266 2267 2268 2269 2270 2271 2272 2273 2274 2275 2276 2277

	*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;
	}
	dprintk("%s: file size=%Lu\n", __FUNCTION__, (unsigned long long)*size);
	return 0;
}

static int decode_attr_link_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
{
A
Al Viro 已提交
2278
	__be32 *p;
L
Linus Torvalds 已提交
2279 2280 2281 2282 2283 2284 2285 2286 2287 2288 2289 2290 2291 2292 2293

	*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;
	}
	dprintk("%s: link support=%s\n", __FUNCTION__, *res == 0 ? "false" : "true");
	return 0;
}

static int decode_attr_symlink_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
{
A
Al Viro 已提交
2294
	__be32 *p;
L
Linus Torvalds 已提交
2295 2296 2297 2298 2299 2300 2301 2302 2303 2304 2305 2306 2307

	*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;
	}
	dprintk("%s: symlink support=%s\n", __FUNCTION__, *res == 0 ? "false" : "true");
	return 0;
}

2308
static int decode_attr_fsid(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_fsid *fsid)
L
Linus Torvalds 已提交
2309
{
A
Al Viro 已提交
2310
	__be32 *p;
L
Linus Torvalds 已提交
2311 2312 2313 2314 2315 2316 2317 2318 2319 2320 2321 2322 2323 2324 2325 2326 2327 2328 2329

	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;
	}
	dprintk("%s: fsid=(0x%Lx/0x%Lx)\n", __FUNCTION__,
			(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
2330
	__be32 *p;
L
Linus Torvalds 已提交
2331 2332 2333 2334 2335 2336 2337 2338 2339 2340 2341 2342 2343 2344 2345

	*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;
	}
	dprintk("%s: file size=%u\n", __FUNCTION__, (unsigned int)*res);
	return 0;
}

static int decode_attr_aclsupport(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
{
A
Al Viro 已提交
2346
	__be32 *p;
L
Linus Torvalds 已提交
2347 2348 2349 2350 2351 2352 2353 2354 2355 2356 2357 2358 2359 2360 2361

	*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;
	}
	dprintk("%s: ACLs supported=%u\n", __FUNCTION__, (unsigned int)*res);
	return 0;
}

static int decode_attr_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
{
A
Al Viro 已提交
2362
	__be32 *p;
L
Linus Torvalds 已提交
2363 2364 2365 2366 2367 2368 2369 2370 2371 2372 2373 2374 2375

	*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;
	}
	dprintk("%s: fileid=%Lu\n", __FUNCTION__, (unsigned long long)*fileid);
	return 0;
}

2376 2377
static int decode_attr_mounted_on_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
{
A
Al Viro 已提交
2378
	__be32 *p;
2379 2380 2381 2382 2383 2384 2385 2386 2387 2388 2389 2390 2391

	*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;
	}
	dprintk("%s: fileid=%Lu\n", __FUNCTION__, (unsigned long long)*fileid);
	return 0;
}

L
Linus Torvalds 已提交
2392 2393
static int decode_attr_files_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
{
A
Al Viro 已提交
2394
	__be32 *p;
L
Linus Torvalds 已提交
2395 2396 2397 2398 2399 2400 2401 2402 2403 2404 2405 2406 2407 2408 2409 2410
	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;
	}
	dprintk("%s: files avail=%Lu\n", __FUNCTION__, (unsigned long long)*res);
	return status;
}

static int decode_attr_files_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
{
A
Al Viro 已提交
2411
	__be32 *p;
L
Linus Torvalds 已提交
2412 2413 2414 2415 2416 2417 2418 2419 2420 2421 2422 2423 2424 2425 2426 2427
	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;
	}
	dprintk("%s: files free=%Lu\n", __FUNCTION__, (unsigned long long)*res);
	return status;
}

static int decode_attr_files_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
{
A
Al Viro 已提交
2428
	__be32 *p;
L
Linus Torvalds 已提交
2429 2430 2431 2432 2433 2434 2435 2436 2437 2438 2439 2440 2441 2442
	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;
	}
	dprintk("%s: files total=%Lu\n", __FUNCTION__, (unsigned long long)*res);
	return status;
}

2443 2444 2445
static int decode_pathname(struct xdr_stream *xdr, struct nfs4_pathname *path)
{
	int n;
A
Al Viro 已提交
2446
	__be32 *p;
2447 2448 2449 2450
	int status = 0;

	READ_BUF(4);
	READ32(n);
2451
	if (n < 0)
2452
		goto out_eio;
2453 2454
	if (n == 0)
		goto root_path;
2455 2456 2457 2458 2459 2460 2461 2462 2463 2464 2465 2466 2467 2468 2469 2470 2471 2472 2473 2474
	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;
2475 2476 2477 2478 2479 2480 2481
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;
2482 2483 2484 2485 2486 2487 2488
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)
2489 2490
{
	int n;
A
Al Viro 已提交
2491
	__be32 *p;
2492 2493 2494 2495 2496 2497 2498
	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;
2499 2500
	dprintk("%s: fsroot ", __FUNCTION__);
	status = decode_pathname(xdr, &res->fs_path);
2501 2502 2503 2504 2505 2506 2507 2508
	if (unlikely(status != 0))
		goto out;
	READ_BUF(4);
	READ32(n);
	if (n <= 0)
		goto out_eio;
	res->nlocations = 0;
	while (res->nlocations < n) {
2509 2510
		int m;
		struct nfs4_fs_location *loc = &res->locations[res->nlocations];
2511

2512 2513 2514
		READ_BUF(4);
		READ32(m);
		if (m <= 0)
2515
			goto out_eio;
2516 2517 2518 2519 2520 2521 2522 2523 2524 2525 2526 2527 2528 2529 2530

		loc->nservers = 0;
		dprintk("%s: servers ", __FUNCTION__);
		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 {
				int i;
				dprintk("%s: using first %d of %d servers returned for location %d\n", __FUNCTION__, NFS4_FS_LOCATION_MAXSERVERS, m, res->nlocations);
				for (i = loc->nservers; i < m; i++) {
T
Trond Myklebust 已提交
2531
					unsigned int len;
2532 2533 2534 2535 2536 2537 2538 2539
					char *data;
					status = decode_opaque_inline(xdr, &len, &data);
					if (unlikely(status != 0))
						goto out_eio;
				}
			}
		}
		status = decode_pathname(xdr, &loc->rootpath);
2540 2541
		if (unlikely(status != 0))
			goto out_eio;
2542
		if (res->nlocations < NFS4_FS_LOCATIONS_MAXENTRIES)
2543 2544 2545 2546 2547 2548 2549 2550 2551 2552
			res->nlocations++;
	}
out:
	dprintk("%s: fs_locations done, error = %d\n", __FUNCTION__, status);
	return status;
out_eio:
	status = -EIO;
	goto out;
}

L
Linus Torvalds 已提交
2553 2554
static int decode_attr_maxfilesize(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
{
A
Al Viro 已提交
2555
	__be32 *p;
L
Linus Torvalds 已提交
2556 2557 2558 2559 2560 2561 2562 2563 2564 2565 2566 2567 2568 2569 2570 2571
	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;
	}
	dprintk("%s: maxfilesize=%Lu\n", __FUNCTION__, (unsigned long long)*res);
	return status;
}

static int decode_attr_maxlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxlink)
{
A
Al Viro 已提交
2572
	__be32 *p;
L
Linus Torvalds 已提交
2573 2574 2575 2576 2577 2578 2579 2580 2581 2582 2583 2584 2585 2586 2587 2588
	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;
	}
	dprintk("%s: maxlink=%u\n", __FUNCTION__, *maxlink);
	return status;
}

static int decode_attr_maxname(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxname)
{
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	__be32 *p;
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	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;
	}
	dprintk("%s: maxname=%u\n", __FUNCTION__, *maxname);
	return status;
}

static int decode_attr_maxread(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
{
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	__be32 *p;
L
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	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;
	}
	dprintk("%s: maxread=%lu\n", __FUNCTION__, (unsigned long)*res);
	return status;
}

static int decode_attr_maxwrite(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
{
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	__be32 *p;
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	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;
	}
	dprintk("%s: maxwrite=%lu\n", __FUNCTION__, (unsigned long)*res);
	return status;
}

static int decode_attr_mode(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *mode)
{
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	*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;
	}
	dprintk("%s: file mode=0%o\n", __FUNCTION__, (unsigned int)*mode);
	return 0;
}

static int decode_attr_nlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *nlink)
{
A
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	__be32 *p;
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	*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;
	}
	dprintk("%s: nlink=%u\n", __FUNCTION__, (unsigned int)*nlink);
	return 0;
}

T
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static int decode_attr_owner(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_client *clp, uint32_t *uid)
L
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{
A
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	uint32_t len;
	__be32 *p;
L
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	*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",
						__FUNCTION__);
		} else
			printk(KERN_WARNING "%s: name too long (%u)!\n",
					__FUNCTION__, len);
		bitmap[1] &= ~FATTR4_WORD1_OWNER;
	}
	dprintk("%s: uid=%d\n", __FUNCTION__, (int)*uid);
	return 0;
}

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static int decode_attr_group(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_client *clp, uint32_t *gid)
L
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{
A
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	uint32_t len;
	__be32 *p;
L
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	*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",
						__FUNCTION__);
		} else
			printk(KERN_WARNING "%s: name too long (%u)!\n",
					__FUNCTION__, len);
		bitmap[1] &= ~FATTR4_WORD1_OWNER_GROUP;
	}
	dprintk("%s: gid=%d\n", __FUNCTION__, (int)*gid);
	return 0;
}

static int decode_attr_rdev(struct xdr_stream *xdr, uint32_t *bitmap, dev_t *rdev)
{
A
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	uint32_t major = 0, minor = 0;
	__be32 *p;
L
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	*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;
	}
	dprintk("%s: rdev=(0x%x:0x%x)\n", __FUNCTION__, major, minor);
	return 0;
}

static int decode_attr_space_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
{
A
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	__be32 *p;
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	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;
	}
	dprintk("%s: space avail=%Lu\n", __FUNCTION__, (unsigned long long)*res);
	return status;
}

static int decode_attr_space_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
{
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	__be32 *p;
L
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	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;
	}
	dprintk("%s: space free=%Lu\n", __FUNCTION__, (unsigned long long)*res);
	return status;
}

static int decode_attr_space_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
{
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	__be32 *p;
L
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2789 2790 2791 2792 2793 2794 2795 2796 2797 2798 2799 2800 2801 2802 2803 2804
	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;
	}
	dprintk("%s: space total=%Lu\n", __FUNCTION__, (unsigned long long)*res);
	return status;
}

static int decode_attr_space_used(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *used)
{
A
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	__be32 *p;
L
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	*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;
	}
	dprintk("%s: space used=%Lu\n", __FUNCTION__,
			(unsigned long long)*used);
	return 0;
}

static int decode_attr_time(struct xdr_stream *xdr, struct timespec *time)
{
A
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	__be32 *p;
L
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2823 2824 2825 2826 2827 2828 2829 2830 2831 2832 2833 2834 2835 2836 2837 2838 2839 2840 2841 2842 2843 2844 2845 2846 2847 2848 2849 2850 2851 2852 2853 2854 2855 2856 2857 2858 2859 2860 2861 2862 2863 2864 2865 2866 2867 2868 2869 2870 2871 2872 2873 2874 2875 2876 2877 2878 2879 2880 2881
	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;
	}
	dprintk("%s: atime=%ld\n", __FUNCTION__, (long)time->tv_sec);
	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;
	}
	dprintk("%s: ctime=%ld\n", __FUNCTION__, (long)time->tv_sec);
	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;
	}
	dprintk("%s: mtime=%ld\n", __FUNCTION__, (long)time->tv_sec);
	return status;
}

A
Al Viro 已提交
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static int verify_attr_len(struct xdr_stream *xdr, __be32 *savep, uint32_t attrlen)
L
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2883 2884 2885 2886 2887 2888 2889 2890 2891 2892 2893 2894 2895 2896 2897 2898 2899
{
	unsigned int attrwords = XDR_QUADLEN(attrlen);
	unsigned int nwords = xdr->p - savep;

	if (unlikely(attrwords != nwords)) {
		printk(KERN_WARNING "%s: server returned incorrect attribute length: %u %c %u\n",
				__FUNCTION__,
				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
2900
	__be32 *p;
L
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2901 2902 2903 2904 2905 2906 2907 2908 2909 2910

	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
2911
	__be32 *p;
L
Linus Torvalds 已提交
2912 2913 2914 2915 2916 2917 2918 2919 2920 2921 2922 2923 2924 2925 2926 2927
	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
2928
	__be32 *p;
L
Linus Torvalds 已提交
2929 2930 2931 2932 2933
	int status;

	status = decode_op_hdr(xdr, OP_CLOSE);
	if (status)
		return status;
2934 2935
	READ_BUF(NFS4_STATEID_SIZE);
	COPYMEM(res->stateid.data, NFS4_STATEID_SIZE);
L
Linus Torvalds 已提交
2936 2937 2938 2939 2940
	return 0;
}

static int decode_commit(struct xdr_stream *xdr, struct nfs_writeres *res)
{
A
Al Viro 已提交
2941
	__be32 *p;
L
Linus Torvalds 已提交
2942 2943 2944 2945 2946 2947 2948 2949 2950 2951 2952 2953
	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
2954
	__be32 *p;
L
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2955 2956 2957 2958 2959 2960 2961 2962 2963 2964 2965 2966 2967 2968 2969 2970
	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
2971
	__be32 *savep;
L
Linus Torvalds 已提交
2972 2973 2974 2975 2976 2977 2978 2979 2980 2981 2982 2983 2984 2985 2986 2987 2988 2989 2990 2991
	uint32_t attrlen, 
		 bitmap[2] = {0};
	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:
2992
	dprintk("%s: xdr returned %d!\n", __FUNCTION__, -status);
L
Linus Torvalds 已提交
2993 2994 2995 2996 2997
	return status;
}
	
static int decode_statfs(struct xdr_stream *xdr, struct nfs_fsstat *fsstat)
{
A
Al Viro 已提交
2998
	__be32 *savep;
L
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2999 3000 3001 3002 3003 3004 3005 3006 3007 3008 3009 3010 3011 3012 3013 3014 3015 3016 3017 3018 3019 3020 3021 3022 3023 3024
	uint32_t attrlen, 
		 bitmap[2] = {0};
	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_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:
3025
	dprintk("%s: xdr returned %d!\n", __FUNCTION__, -status);
L
Linus Torvalds 已提交
3026 3027 3028 3029 3030
	return status;
}

static int decode_pathconf(struct xdr_stream *xdr, struct nfs_pathconf *pathconf)
{
A
Al Viro 已提交
3031
	__be32 *savep;
L
Linus Torvalds 已提交
3032 3033 3034 3035 3036 3037 3038 3039 3040 3041 3042 3043 3044 3045 3046 3047 3048 3049
	uint32_t attrlen, 
		 bitmap[2] = {0};
	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_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:
3050
	dprintk("%s: xdr returned %d!\n", __FUNCTION__, -status);
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3051 3052 3053 3054 3055
	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
3056
	__be32 *savep;
L
Linus Torvalds 已提交
3057 3058 3059 3060
	uint32_t attrlen,
		 bitmap[2] = {0},
		 type;
	int status, fmode = 0;
3061
	uint64_t fileid;
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3062 3063 3064 3065 3066 3067 3068 3069 3070 3071 3072 3073 3074 3075 3076 3077 3078 3079 3080 3081 3082 3083

	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;
3084
	if ((status = decode_attr_fsid(xdr, bitmap, &fattr->fsid)) != 0)
L
Linus Torvalds 已提交
3085 3086 3087
		goto xdr_error;
	if ((status = decode_attr_fileid(xdr, bitmap, &fattr->fileid)) != 0)
		goto xdr_error;
3088
	if ((status = decode_attr_fs_locations(xdr, bitmap, container_of(fattr,
3089
						struct nfs4_fs_locations,
3090 3091
						fattr))) != 0)
		goto xdr_error;
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3092 3093 3094 3095 3096
	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;
3097
	if ((status = decode_attr_owner(xdr, bitmap, server->nfs_client, &fattr->uid)) != 0)
L
Linus Torvalds 已提交
3098
		goto xdr_error;
3099
	if ((status = decode_attr_group(xdr, bitmap, server->nfs_client, &fattr->gid)) != 0)
L
Linus Torvalds 已提交
3100 3101 3102 3103 3104 3105 3106 3107 3108 3109 3110
		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;
3111 3112 3113 3114
	if ((status = decode_attr_mounted_on_fileid(xdr, bitmap, &fileid)) != 0)
		goto xdr_error;
	if (fattr->fileid == 0 && fileid != 0)
		fattr->fileid = fileid;
3115
	if ((status = verify_attr_len(xdr, savep, attrlen)) == 0)
L
Linus Torvalds 已提交
3116 3117
		fattr->valid = NFS_ATTR_FATTR | NFS_ATTR_FATTR_V3 | NFS_ATTR_FATTR_V4;
xdr_error:
3118
	dprintk("%s: xdr returned %d\n", __FUNCTION__, -status);
L
Linus Torvalds 已提交
3119 3120 3121 3122 3123 3124
	return status;
}


static int decode_fsinfo(struct xdr_stream *xdr, struct nfs_fsinfo *fsinfo)
{
A
Al Viro 已提交
3125
	__be32 *savep;
L
Linus Torvalds 已提交
3126 3127 3128 3129 3130 3131 3132 3133 3134 3135 3136 3137 3138 3139 3140 3141 3142 3143 3144 3145 3146 3147 3148 3149 3150
	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:
3151
	dprintk("%s: xdr returned %d!\n", __FUNCTION__, -status);
L
Linus Torvalds 已提交
3152 3153 3154 3155 3156
	return status;
}

static int decode_getfh(struct xdr_stream *xdr, struct nfs_fh *fh)
{
A
Al Viro 已提交
3157
	__be32 *p;
L
Linus Torvalds 已提交
3158 3159 3160 3161 3162 3163 3164 3165 3166 3167 3168 3169 3170 3171 3172 3173 3174 3175 3176 3177 3178 3179 3180 3181 3182 3183 3184 3185 3186 3187 3188 3189
	uint32_t len;
	int status;

	status = decode_op_hdr(xdr, OP_GETFH);
	if (status)
		return status;
	/* Zero handle first to allow comparisons */
	memset(fh, 0, sizeof(*fh));

	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;
	
	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
3190
static int decode_lock_denied (struct xdr_stream *xdr, struct file_lock *fl)
L
Linus Torvalds 已提交
3191
{
T
Trond Myklebust 已提交
3192
	uint64_t offset, length, clientid;
A
Al Viro 已提交
3193
	__be32 *p;
T
Trond Myklebust 已提交
3194
	uint32_t namelen, type;
L
Linus Torvalds 已提交
3195 3196

	READ_BUF(32);
T
Trond Myklebust 已提交
3197 3198 3199 3200 3201 3202 3203 3204 3205 3206 3207 3208 3209 3210
	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
3211 3212 3213 3214 3215
	READ32(namelen);
	READ_BUF(namelen);
	return -NFS4ERR_DENIED;
}

T
Trond Myklebust 已提交
3216
static int decode_lock(struct xdr_stream *xdr, struct nfs_lock_res *res)
L
Linus Torvalds 已提交
3217
{
A
Al Viro 已提交
3218
	__be32 *p;
L
Linus Torvalds 已提交
3219 3220 3221 3222
	int status;

	status = decode_op_hdr(xdr, OP_LOCK);
	if (status == 0) {
3223 3224
		READ_BUF(NFS4_STATEID_SIZE);
		COPYMEM(res->stateid.data, NFS4_STATEID_SIZE);
L
Linus Torvalds 已提交
3225
	} else if (status == -NFS4ERR_DENIED)
T
Trond Myklebust 已提交
3226
		return decode_lock_denied(xdr, NULL);
L
Linus Torvalds 已提交
3227 3228 3229
	return status;
}

T
Trond Myklebust 已提交
3230
static int decode_lockt(struct xdr_stream *xdr, struct nfs_lockt_res *res)
L
Linus Torvalds 已提交
3231 3232 3233 3234
{
	int status;
	status = decode_op_hdr(xdr, OP_LOCKT);
	if (status == -NFS4ERR_DENIED)
T
Trond Myklebust 已提交
3235
		return decode_lock_denied(xdr, res->denied);
L
Linus Torvalds 已提交
3236 3237 3238
	return status;
}

T
Trond Myklebust 已提交
3239
static int decode_locku(struct xdr_stream *xdr, struct nfs_locku_res *res)
L
Linus Torvalds 已提交
3240
{
A
Al Viro 已提交
3241
	__be32 *p;
L
Linus Torvalds 已提交
3242 3243 3244 3245
	int status;

	status = decode_op_hdr(xdr, OP_LOCKU);
	if (status == 0) {
3246 3247
		READ_BUF(NFS4_STATEID_SIZE);
		COPYMEM(res->stateid.data, NFS4_STATEID_SIZE);
L
Linus Torvalds 已提交
3248 3249 3250 3251 3252 3253 3254 3255 3256 3257 3258 3259
	}
	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
3260
        __be32 *p;
L
Linus Torvalds 已提交
3261 3262 3263 3264 3265 3266 3267 3268 3269 3270 3271 3272 3273 3274 3275 3276 3277 3278
	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
3279
        __be32 *p;
L
Linus Torvalds 已提交
3280 3281 3282 3283 3284 3285 3286 3287
        uint32_t delegation_type;

	READ_BUF(4);
	READ32(delegation_type);
	if (delegation_type == NFS4_OPEN_DELEGATE_NONE) {
		res->delegation_type = 0;
		return 0;
	}
3288 3289
	READ_BUF(NFS4_STATEID_SIZE+4);
	COPYMEM(res->delegation.data, NFS4_STATEID_SIZE);
L
Linus Torvalds 已提交
3290 3291 3292 3293 3294 3295 3296 3297 3298 3299
	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;
	}
3300
	return decode_ace(xdr, NULL, res->server->nfs_client);
L
Linus Torvalds 已提交
3301 3302 3303 3304
}

static int decode_open(struct xdr_stream *xdr, struct nfs_openres *res)
{
A
Al Viro 已提交
3305
        __be32 *p;
3306
	uint32_t savewords, bmlen, i;
L
Linus Torvalds 已提交
3307 3308 3309 3310 3311
        int status;

        status = decode_op_hdr(xdr, OP_OPEN);
        if (status)
                return status;
3312 3313
        READ_BUF(NFS4_STATEID_SIZE);
        COPYMEM(res->stateid.data, NFS4_STATEID_SIZE);
L
Linus Torvalds 已提交
3314 3315 3316 3317 3318 3319 3320 3321 3322 3323

        decode_change_info(xdr, &res->cinfo);

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

        READ_BUF(bmlen << 2);
3324 3325 3326 3327 3328 3329
	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
3330 3331
	return decode_delegation(xdr, res);
xdr_error:
3332
	dprintk("%s: Bitmap too large! Length = %u\n", __FUNCTION__, bmlen);
L
Linus Torvalds 已提交
3333 3334 3335 3336 3337
	return -EIO;
}

static int decode_open_confirm(struct xdr_stream *xdr, struct nfs_open_confirmres *res)
{
A
Al Viro 已提交
3338
        __be32 *p;
L
Linus Torvalds 已提交
3339 3340 3341 3342 3343
	int status;

        status = decode_op_hdr(xdr, OP_OPEN_CONFIRM);
        if (status)
                return status;
3344 3345
        READ_BUF(NFS4_STATEID_SIZE);
        COPYMEM(res->stateid.data, NFS4_STATEID_SIZE);
L
Linus Torvalds 已提交
3346 3347 3348 3349 3350
        return 0;
}

static int decode_open_downgrade(struct xdr_stream *xdr, struct nfs_closeres *res)
{
A
Al Viro 已提交
3351
	__be32 *p;
L
Linus Torvalds 已提交
3352 3353 3354 3355 3356
	int status;

	status = decode_op_hdr(xdr, OP_OPEN_DOWNGRADE);
	if (status)
		return status;
3357 3358
	READ_BUF(NFS4_STATEID_SIZE);
	COPYMEM(res->stateid.data, NFS4_STATEID_SIZE);
L
Linus Torvalds 已提交
3359 3360 3361 3362 3363 3364 3365 3366 3367 3368 3369 3370 3371 3372 3373 3374
	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
3375
	__be32 *p;
L
Linus Torvalds 已提交
3376 3377 3378 3379 3380 3381 3382 3383 3384 3385 3386 3387 3388 3389 3390 3391 3392 3393 3394 3395 3396 3397 3398 3399 3400 3401 3402 3403 3404
	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) {
		printk(KERN_WARNING "NFS: server cheating in read reply: "
				"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;
	unsigned int	nr, pglen = rcvbuf->page_len;
A
Al Viro 已提交
3405
	__be32		*end, *entry, *p, *kaddr;
3406
	uint32_t	len, attrlen, xlen;
L
Linus Torvalds 已提交
3407 3408 3409 3410 3411 3412 3413
	int 		hdrlen, recvd, status;

	status = decode_op_hdr(xdr, OP_READDIR);
	if (status)
		return status;
	READ_BUF(8);
	COPYMEM(readdir->verifier.data, 8);
3414 3415 3416 3417 3418
	dprintk("%s: verifier = 0x%x%x\n",
			__FUNCTION__,
			((u32 *)readdir->verifier.data)[0],
			((u32 *)readdir->verifier.data)[1]);

L
Linus Torvalds 已提交
3419 3420 3421 3422 3423 3424 3425 3426

	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
3427
	kaddr = p = kmap_atomic(page, KM_USER0);
3428
	end = p + ((pglen + readdir->pgbase) >> 2);
L
Linus Torvalds 已提交
3429 3430
	entry = p;
	for (nr = 0; *p++; nr++) {
3431
		if (end - p < 3)
L
Linus Torvalds 已提交
3432
			goto short_pkt;
3433
		dprintk("cookie = %Lu, ", *((unsigned long long *)p));
L
Linus Torvalds 已提交
3434 3435 3436 3437 3438 3439
		p += 2;			/* cookie */
		len = ntohl(*p++);	/* filename length */
		if (len > NFS4_MAXNAMLEN) {
			printk(KERN_WARNING "NFS: giant filename in readdir (len 0x%x)\n", len);
			goto err_unmap;
		}
3440 3441
		xlen = XDR_QUADLEN(len);
		if (end - p < xlen + 1)
L
Linus Torvalds 已提交
3442
			goto short_pkt;
3443 3444
		dprintk("filename = %*s\n", len, (char *)p);
		p += xlen;
L
Linus Torvalds 已提交
3445
		len = ntohl(*p++);	/* bitmap length */
3446
		if (end - p < len + 1)
L
Linus Torvalds 已提交
3447
			goto short_pkt;
3448
		p += len;
L
Linus Torvalds 已提交
3449
		attrlen = XDR_QUADLEN(ntohl(*p++));
3450
		if (end - p < attrlen + 2)
L
Linus Torvalds 已提交
3451
			goto short_pkt;
3452
		p += attrlen;		/* attributes */
L
Linus Torvalds 已提交
3453 3454 3455 3456 3457 3458 3459 3460
		entry = p;
	}
	if (!nr && (entry[0] != 0 || entry[1] == 0))
		goto short_pkt;
out:	
	kunmap_atomic(kaddr, KM_USER0);
	return 0;
short_pkt:
3461
	dprintk("%s: short packet at entry %d\n", __FUNCTION__, nr);
L
Linus Torvalds 已提交
3462 3463 3464 3465 3466 3467 3468 3469 3470 3471 3472 3473 3474 3475 3476 3477 3478
	entry[0] = entry[1] = 0;
	/* truncate listing ? */
	if (!nr) {
		printk(KERN_NOTICE "NFS: readdir reply truncated!\n");
		entry[1] = 1;
	}
	goto out;
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;
	int hdrlen, len, recvd;
A
Al Viro 已提交
3479
	__be32 *p;
L
Linus Torvalds 已提交
3480 3481 3482 3483 3484 3485 3486 3487 3488 3489 3490 3491 3492 3493 3494 3495 3496 3497 3498 3499 3500 3501 3502 3503 3504 3505 3506 3507 3508 3509 3510 3511 3512 3513 3514 3515 3516 3517 3518 3519 3520 3521 3522 3523 3524 3525 3526 3527 3528 3529 3530 3531 3532 3533 3534 3535 3536 3537 3538 3539 3540 3541 3542 3543 3544 3545 3546
	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) {
		dprintk(KERN_WARNING "nfs: server returned giant symlink!\n");
		return -ENAMETOOLONG;
	}
	hdrlen = (char *) xdr->p - (char *) iov->iov_base;
	recvd = req->rq_rcv_buf.len - hdrlen;
	if (recvd < len) {
		printk(KERN_WARNING "NFS: server cheating in readlink reply: "
				"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);
}

3547 3548 3549 3550 3551 3552
static int
decode_restorefh(struct xdr_stream *xdr)
{
	return decode_op_hdr(xdr, OP_RESTOREFH);
}

3553 3554 3555
static int decode_getacl(struct xdr_stream *xdr, struct rpc_rqst *req,
		size_t *acl_len)
{
A
Al Viro 已提交
3556
	__be32 *savep;
3557 3558 3559 3560 3561 3562 3563 3564 3565 3566 3567 3568 3569 3570 3571 3572 3573 3574 3575 3576 3577 3578 3579 3580 3581 3582 3583 3584
	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)) {
		int hdrlen, recvd;

		/* 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) {
			printk(KERN_WARNING "NFS: server cheating in getattr"
					" acl reply: attrlen %u > recvd %u\n",
					attrlen, recvd);
			return -EINVAL;
		}
3585
		xdr_read_pages(xdr, attrlen);
3586
		*acl_len = attrlen;
J
J. Bruce Fields 已提交
3587 3588
	} else
		status = -EOPNOTSUPP;
3589 3590 3591 3592 3593

out:
	return status;
}

L
Linus Torvalds 已提交
3594 3595 3596 3597 3598 3599 3600 3601
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
3602
	__be32 *p;
L
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3603 3604 3605 3606 3607 3608 3609 3610 3611 3612 3613 3614 3615
	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;
}

3616
static int decode_setclientid(struct xdr_stream *xdr, struct nfs_client *clp)
L
Linus Torvalds 已提交
3617
{
A
Al Viro 已提交
3618
	__be32 *p;
L
Linus Torvalds 已提交
3619 3620 3621 3622 3623 3624 3625 3626 3627 3628 3629 3630 3631
	uint32_t opnum;
	int32_t nfserr;

	READ_BUF(8);
	READ32(opnum);
	if (opnum != OP_SETCLIENTID) {
		printk(KERN_NOTICE
				"nfs4_decode_setclientid: Server returned operation"
			       	" %d\n", opnum);
		return -EIO;
	}
	READ32(nfserr);
	if (nfserr == NFS_OK) {
3632
		READ_BUF(8 + NFS4_VERIFIER_SIZE);
L
Linus Torvalds 已提交
3633
		READ64(clp->cl_clientid);
3634
		COPYMEM(clp->cl_confirm.data, NFS4_VERIFIER_SIZE);
L
Linus Torvalds 已提交
3635 3636 3637 3638 3639 3640 3641 3642 3643 3644 3645 3646 3647 3648
	} 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
3649
		return -nfs4_stat_to_errno(nfserr);
L
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3650 3651 3652 3653 3654 3655 3656 3657 3658 3659 3660

	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
3661
	__be32 *p;
L
Linus Torvalds 已提交
3662 3663 3664 3665 3666 3667 3668 3669 3670 3671 3672 3673 3674 3675 3676 3677 3678 3679 3680 3681 3682
	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
3683
static int nfs4_xdr_dec_open_downgrade(struct rpc_rqst *rqstp, __be32 *p, struct nfs_closeres *res)
L
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3684 3685 3686 3687 3688 3689 3690 3691 3692 3693 3694 3695 3696
{
        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);
3697 3698 3699
	if (status != 0)
		goto out;
	decode_getfattr(&xdr, res->fattr, res->server);
L
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3700 3701 3702 3703 3704 3705 3706 3707 3708 3709 3710
out:
        return status;
}

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

/*
 * Decode ACCESS response
 */
A
Al Viro 已提交
3711
static int nfs4_xdr_dec_access(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_accessres *res)
L
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3712 3713 3714 3715 3716 3717 3718 3719 3720 3721 3722 3723 3724 3725 3726 3727 3728
{
	struct xdr_stream xdr;
	struct compound_hdr hdr;
	int status;
	
	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)
		status = decode_access(&xdr, res);
out:
	return status;
}

/*
 * Decode LOOKUP response
 */
A
Al Viro 已提交
3729
static int nfs4_xdr_dec_lookup(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_lookup_res *res)
L
Linus Torvalds 已提交
3730 3731 3732 3733 3734 3735 3736 3737 3738 3739 3740 3741 3742 3743 3744 3745 3746 3747 3748 3749 3750 3751
{
	struct xdr_stream xdr;
	struct compound_hdr hdr;
	int status;
	
	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
3752
static int nfs4_xdr_dec_lookup_root(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_lookup_res *res)
L
Linus Torvalds 已提交
3753 3754 3755 3756 3757 3758 3759 3760 3761 3762 3763 3764 3765 3766 3767 3768 3769 3770 3771
{
	struct xdr_stream xdr;
	struct compound_hdr hdr;
	int status;
	
	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
 */
A
Al Viro 已提交
3772
static int nfs4_xdr_dec_remove(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_remove_res *res)
L
Linus Torvalds 已提交
3773 3774 3775 3776 3777 3778 3779 3780
{
	struct xdr_stream xdr;
	struct compound_hdr hdr;
	int status;
	
	xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
	if ((status = decode_compound_hdr(&xdr, &hdr)) != 0)
		goto out;
3781 3782 3783 3784 3785
	if ((status = decode_putfh(&xdr)) != 0)
		goto out;
	if ((status = decode_remove(&xdr, &res->cinfo)) != 0)
		goto out;
	decode_getfattr(&xdr, res->dir_attr, res->server);
L
Linus Torvalds 已提交
3786 3787 3788 3789 3790 3791 3792
out:
	return status;
}

/*
 * Decode RENAME response
 */
A
Al Viro 已提交
3793
static int nfs4_xdr_dec_rename(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_rename_res *res)
L
Linus Torvalds 已提交
3794 3795 3796 3797 3798 3799 3800 3801 3802 3803 3804 3805 3806 3807
{
	struct xdr_stream xdr;
	struct compound_hdr hdr;
	int status;
	
	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;
3808 3809 3810 3811 3812 3813 3814 3815
	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
3816 3817 3818 3819 3820 3821 3822
out:
	return status;
}

/*
 * Decode LINK response
 */
A
Al Viro 已提交
3823
static int nfs4_xdr_dec_link(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_link_res *res)
L
Linus Torvalds 已提交
3824 3825 3826 3827 3828 3829 3830 3831 3832 3833 3834 3835 3836 3837
{
	struct xdr_stream xdr;
	struct compound_hdr hdr;
	int status;
	
	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;
3838 3839 3840 3841 3842 3843 3844 3845 3846 3847 3848
	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
3849 3850 3851 3852 3853 3854 3855
out:
	return status;
}

/*
 * Decode CREATE response
 */
A
Al Viro 已提交
3856
static int nfs4_xdr_dec_create(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_create_res *res)
L
Linus Torvalds 已提交
3857 3858 3859 3860 3861 3862 3863 3864 3865 3866
{
	struct xdr_stream xdr;
	struct compound_hdr hdr;
	int status;
	
	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;
3867 3868
	if ((status = decode_savefh(&xdr)) != 0)
		goto out;
L
Linus Torvalds 已提交
3869 3870 3871 3872
	if ((status = decode_create(&xdr,&res->dir_cinfo)) != 0)
		goto out;
	if ((status = decode_getfh(&xdr, res->fh)) != 0)
		goto out;
3873 3874 3875 3876 3877
	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
3878 3879 3880 3881 3882 3883 3884
out:
	return status;
}

/*
 * Decode SYMLINK response
 */
A
Al Viro 已提交
3885
static int nfs4_xdr_dec_symlink(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_create_res *res)
L
Linus Torvalds 已提交
3886 3887 3888 3889 3890 3891 3892
{
	return nfs4_xdr_dec_create(rqstp, p, res);
}

/*
 * Decode GETATTR response
 */
A
Al Viro 已提交
3893
static int nfs4_xdr_dec_getattr(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_getattr_res *res)
L
Linus Torvalds 已提交
3894 3895 3896 3897 3898 3899 3900 3901 3902 3903 3904 3905 3906 3907 3908 3909 3910 3911
{
	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_getfattr(&xdr, res->fattr, res->server);
out:
	return status;

}

3912 3913 3914 3915
/*
 * Encode an SETACL request
 */
static int
A
Al Viro 已提交
3916
nfs4_xdr_enc_setacl(struct rpc_rqst *req, __be32 *p, struct nfs_setaclargs *args)
3917 3918 3919 3920 3921 3922 3923 3924 3925 3926 3927 3928 3929 3930 3931 3932 3933 3934 3935 3936
{
        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
3937
nfs4_xdr_dec_setacl(struct rpc_rqst *rqstp, __be32 *p, void *res)
3938 3939 3940 3941 3942 3943 3944 3945 3946 3947 3948 3949 3950 3951 3952 3953
{
	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
3954

3955 3956 3957 3958
/*
 * Decode GETACL response
 */
static int
A
Al Viro 已提交
3959
nfs4_xdr_dec_getacl(struct rpc_rqst *rqstp, __be32 *p, size_t *acl_len)
3960 3961 3962 3963 3964 3965 3966 3967 3968 3969 3970 3971 3972 3973 3974 3975 3976 3977
{
	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
3978 3979 3980
/*
 * Decode CLOSE response
 */
A
Al Viro 已提交
3981
static int nfs4_xdr_dec_close(struct rpc_rqst *rqstp, __be32 *p, struct nfs_closeres *res)
L
Linus Torvalds 已提交
3982 3983 3984 3985 3986 3987 3988 3989 3990 3991 3992 3993 3994
{
        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);
3995 3996 3997 3998 3999 4000 4001 4002 4003
	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
4004 4005 4006 4007 4008 4009 4010
out:
        return status;
}

/*
 * Decode OPEN response
 */
A
Al Viro 已提交
4011
static int nfs4_xdr_dec_open(struct rpc_rqst *rqstp, __be32 *p, struct nfs_openres *res)
L
Linus Torvalds 已提交
4012 4013 4014 4015 4016 4017 4018 4019 4020 4021 4022 4023
{
        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;
4024 4025 4026
        status = decode_savefh(&xdr);
	if (status)
		goto out;
L
Linus Torvalds 已提交
4027 4028 4029 4030 4031 4032
        status = decode_open(&xdr, res);
        if (status)
                goto out;
	status = decode_getfh(&xdr, &res->fh);
        if (status)
		goto out;
4033 4034 4035 4036 4037
	if (decode_getfattr(&xdr, res->f_attr, res->server) != 0)
		goto out;
	if ((status = decode_restorefh(&xdr)) != 0)
		goto out;
	decode_getfattr(&xdr, res->dir_attr, res->server);
L
Linus Torvalds 已提交
4038 4039 4040 4041 4042 4043 4044
out:
        return status;
}

/*
 * Decode OPEN_CONFIRM response
 */
A
Al Viro 已提交
4045
static int nfs4_xdr_dec_open_confirm(struct rpc_rqst *rqstp, __be32 *p, struct nfs_open_confirmres *res)
L
Linus Torvalds 已提交
4046 4047 4048 4049 4050 4051 4052 4053 4054 4055 4056 4057 4058 4059 4060 4061 4062 4063 4064 4065
{
        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
4066
static int nfs4_xdr_dec_open_noattr(struct rpc_rqst *rqstp, __be32 *p, struct nfs_openres *res)
L
Linus Torvalds 已提交
4067 4068 4069 4070 4071 4072 4073 4074 4075 4076 4077 4078 4079
{
        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);
4080 4081 4082
        if (status)
                goto out;
	decode_getfattr(&xdr, res->f_attr, res->server);
L
Linus Torvalds 已提交
4083 4084 4085 4086 4087 4088 4089
out:
        return status;
}

/*
 * Decode SETATTR response
 */
A
Al Viro 已提交
4090
static int nfs4_xdr_dec_setattr(struct rpc_rqst *rqstp, __be32 *p, struct nfs_setattrres *res)
L
Linus Torvalds 已提交
4091 4092 4093 4094 4095 4096 4097 4098 4099 4100 4101 4102 4103 4104 4105 4106 4107 4108 4109 4110 4111 4112 4113 4114 4115
{
        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
4116
static int nfs4_xdr_dec_lock(struct rpc_rqst *rqstp, __be32 *p, struct nfs_lock_res *res)
L
Linus Torvalds 已提交
4117 4118 4119 4120 4121 4122 4123 4124 4125 4126 4127 4128 4129 4130 4131 4132 4133 4134 4135 4136
{
	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
4137
static int nfs4_xdr_dec_lockt(struct rpc_rqst *rqstp, __be32 *p, struct nfs_lockt_res *res)
L
Linus Torvalds 已提交
4138 4139 4140 4141 4142 4143 4144 4145 4146 4147 4148 4149 4150 4151 4152 4153 4154 4155 4156 4157
{
	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
4158
static int nfs4_xdr_dec_locku(struct rpc_rqst *rqstp, __be32 *p, struct nfs_locku_res *res)
L
Linus Torvalds 已提交
4159 4160 4161 4162 4163 4164 4165 4166 4167 4168 4169 4170 4171 4172 4173 4174 4175 4176 4177 4178
{
	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
4179
static int nfs4_xdr_dec_readlink(struct rpc_rqst *rqstp, __be32 *p, void *res)
L
Linus Torvalds 已提交
4180 4181 4182 4183 4184 4185 4186 4187 4188 4189 4190 4191 4192 4193 4194 4195 4196 4197 4198 4199
{
	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
4200
static int nfs4_xdr_dec_readdir(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_readdir_res *res)
L
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4201 4202 4203 4204 4205 4206 4207 4208 4209 4210 4211 4212 4213 4214 4215 4216 4217 4218 4219 4220
{
	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
4221
static int nfs4_xdr_dec_read(struct rpc_rqst *rqstp, __be32 *p, struct nfs_readres *res)
L
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4222 4223 4224 4225 4226 4227 4228 4229 4230 4231 4232 4233 4234 4235 4236 4237 4238 4239 4240 4241 4242 4243
{
	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
4244
static int nfs4_xdr_dec_write(struct rpc_rqst *rqstp, __be32 *p, struct nfs_writeres *res)
L
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{
	struct xdr_stream xdr;
	struct compound_hdr hdr;
	int status;

	xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
	status = decode_compound_hdr(&xdr, &hdr);
	if (status)
		goto out;
	status = decode_putfh(&xdr);
	if (status)
		goto out;
	status = decode_write(&xdr, res);
4258 4259 4260
	if (status)
		goto out;
	decode_getfattr(&xdr, res->fattr, res->server);
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	if (!status)
		status = res->count;
out:
	return status;
}

/*
 * Decode COMMIT response
 */
A
Al Viro 已提交
4270
static int nfs4_xdr_dec_commit(struct rpc_rqst *rqstp, __be32 *p, struct nfs_writeres *res)
L
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4271 4272 4273 4274 4275 4276 4277 4278 4279 4280 4281 4282 4283
{
	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);
4284 4285 4286
	if (status)
		goto out;
	decode_getfattr(&xdr, res->fattr, res->server);
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4287 4288 4289 4290 4291 4292 4293
out:
	return status;
}

/*
 * FSINFO request
 */
A
Al Viro 已提交
4294
static int nfs4_xdr_dec_fsinfo(struct rpc_rqst *req, __be32 *p, struct nfs_fsinfo *fsinfo)
L
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4295 4296 4297 4298 4299 4300 4301 4302 4303 4304 4305 4306
{
	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);
	if (!status)
4307
		status = -nfs4_stat_to_errno(hdr.status);
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	return status;
}

/*
 * PATHCONF request
 */
A
Al Viro 已提交
4314
static int nfs4_xdr_dec_pathconf(struct rpc_rqst *req, __be32 *p, struct nfs_pathconf *pathconf)
L
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4315 4316 4317 4318 4319 4320 4321 4322 4323 4324 4325 4326 4327 4328 4329 4330 4331
{
	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
4332
static int nfs4_xdr_dec_statfs(struct rpc_rqst *req, __be32 *p, struct nfs_fsstat *fsstat)
L
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4333 4334 4335 4336 4337 4338 4339 4340 4341 4342 4343 4344 4345 4346 4347 4348 4349
{
	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
4350
static int nfs4_xdr_dec_server_caps(struct rpc_rqst *req, __be32 *p, struct nfs4_server_caps_res *res)
L
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4351 4352 4353 4354 4355 4356 4357 4358 4359 4360 4361 4362 4363 4364 4365 4366 4367 4368
{
	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
4369
static int nfs4_xdr_dec_renew(struct rpc_rqst *rqstp, __be32 *p, void *dummy)
L
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4370 4371 4372 4373 4374 4375 4376 4377 4378 4379 4380 4381 4382 4383 4384
{
	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
4385
static int nfs4_xdr_dec_setclientid(struct rpc_rqst *req, __be32 *p,
4386
		struct nfs_client *clp)
L
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4387 4388 4389 4390 4391 4392 4393 4394 4395 4396
{
	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);
	if (!status)
4397
		status = -nfs4_stat_to_errno(hdr.status);
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	return status;
}

/*
 * a SETCLIENTID_CONFIRM request
 */
A
Al Viro 已提交
4404
static int nfs4_xdr_dec_setclientid_confirm(struct rpc_rqst *req, __be32 *p, struct nfs_fsinfo *fsinfo)
L
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4405 4406 4407 4408 4409 4410 4411 4412 4413 4414 4415 4416 4417 4418
{
	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);
	if (!status)
4419
		status = -nfs4_stat_to_errno(hdr.status);
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	return status;
}

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

	xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
	status = decode_compound_hdr(&xdr, &hdr);
4434 4435 4436 4437 4438 4439 4440 4441
	if (status != 0)
		goto out;
	status = decode_putfh(&xdr);
	if (status != 0)
		goto out;
	status = decode_delegreturn(&xdr);
	decode_getfattr(&xdr, res->fattr, res->server);
out:
L
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4442 4443 4444
	return status;
}

4445 4446 4447
/*
 * FS_LOCATIONS request
 */
A
Al Viro 已提交
4448
static int nfs4_xdr_dec_fs_locations(struct rpc_rqst *req, __be32 *p, struct nfs4_fs_locations *res)
4449 4450 4451 4452 4453 4454 4455 4456 4457 4458 4459 4460 4461 4462 4463 4464 4465 4466 4467
{
	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;
}

4468
__be32 *nfs4_decode_dirent(__be32 *p, struct nfs_entry *entry, int plus)
L
Linus Torvalds 已提交
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{
	uint32_t bitmap[2] = {0};
	uint32_t len;

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

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

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

	len = ntohl(*p++);		/* bitmap length */
	if (len-- > 0) {
		bitmap[0] = ntohl(*p++);
		if (len-- > 0) {
			bitmap[1] = ntohl(*p++);
			p += len;
		}
	}
	len = XDR_QUADLEN(ntohl(*p++));	/* attribute buffer length */
	if (len > 0) {
4503 4504 4505 4506 4507 4508
		if (bitmap[0] & FATTR4_WORD0_RDATTR_ERROR) {
			bitmap[0] &= ~FATTR4_WORD0_RDATTR_ERROR;
			/* Ignore the return value of rdattr_error for now */
			p++;
			len--;
		}
L
Linus Torvalds 已提交
4509 4510 4511 4512 4513 4514 4515 4516 4517 4518 4519 4520 4521 4522 4523 4524 4525 4526 4527 4528 4529 4530 4531 4532 4533 4534 4535 4536 4537 4538 4539 4540 4541 4542 4543 4544 4545 4546 4547
		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		},
	{ 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	},
4548 4549
	{ NFS4ERR_BADOWNER,	EINVAL		},
	{ NFS4ERR_BADNAME,	EINVAL		},
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	{ 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
						    * to be handled by a
						    * middle-layer.
						    */
	{ -1,			EIO		}
};

/*
 * Convert an NFS error code to a local one.
 * This one is used jointly by NFSv2 and NFSv3.
 */
static int
4572
nfs4_stat_to_errno(int stat)
L
Linus Torvalds 已提交
4573 4574 4575 4576 4577 4578 4579 4580 4581 4582 4583 4584 4585 4586 4587 4588 4589 4590 4591 4592 4593 4594 4595
{
	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. */
		return ESERVERFAULT;
	}
	/* 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.
	 */
	return stat;
}

#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,		\
4596 4597
	.p_arglen = NFS4_##argtype##_sz,			\
	.p_replen = NFS4_##restype##_sz,			\
4598 4599
	.p_statidx = NFSPROC4_CLNT_##proc,			\
	.p_name   = #proc,					\
L
Linus Torvalds 已提交
4600 4601 4602 4603 4604 4605 4606 4607 4608 4609 4610 4611 4612 4613 4614 4615 4616 4617 4618 4619 4620 4621 4622 4623 4624 4625 4626 4627 4628 4629 4630 4631 4632 4633
    }

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),
4634
  PROC(GETACL,		enc_getacl,	dec_getacl),
4635
  PROC(SETACL,		enc_setacl,	dec_setacl),
4636
  PROC(FS_LOCATIONS,	enc_fs_locations, dec_fs_locations),
L
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4637 4638 4639 4640
};

struct rpc_version		nfs_version4 = {
	.number			= 4,
4641
	.nrprocs		= ARRAY_SIZE(nfs4_procedures),
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4642 4643 4644 4645 4646 4647 4648 4649
	.procs			= nfs4_procedures
};

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