nfs4xdr.c 157.3 KB
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/*
 *  fs/nfs/nfs4xdr.c
 *
 *  Client-side XDR for NFSv4.
 *
 *  Copyright (c) 2002 The Regents of the University of Michigan.
 *  All rights reserved.
 *
 *  Kendrick Smith <kmsmith@umich.edu>
 *  Andy Adamson   <andros@umich.edu>
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 *
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 *  Redistribution and use in source and binary forms, with or without
 *  modification, are permitted provided that the following conditions
 *  are met:
 *
 *  1. Redistributions of source code must retain the above copyright
 *     notice, this list of conditions and the following disclaimer.
 *  2. Redistributions in binary form must reproduce the above copyright
 *     notice, this list of conditions and the following disclaimer in the
 *     documentation and/or other materials provided with the distribution.
 *  3. Neither the name of the University nor the names of its
 *     contributors may be used to endorse or promote products derived
 *     from this software without specific prior written permission.
 *
 *  THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
 *  WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
 *  MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 *  DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
 *  FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 *  CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 *  SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
 *  BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
 *  LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
 *  NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 *  SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

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

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

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

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/* lock,open owner id:
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 * we currently use size 2 (u64) out of (NFS4_OPAQUE_LIMIT  >> 2)
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 */
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#define open_owner_id_maxsz	(1 + 4)
#define lock_owner_id_maxsz	(1 + 4)
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#define decode_lockowner_maxsz	(1 + XDR_QUADLEN(IDMAP_NAMESZ))
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#define compound_encode_hdr_maxsz	(3 + (NFS4_MAXTAGLEN >> 2))
#define compound_decode_hdr_maxsz	(3 + (NFS4_MAXTAGLEN >> 2))
#define op_encode_hdr_maxsz	(1)
#define op_decode_hdr_maxsz	(2)
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#define encode_stateid_maxsz	(XDR_QUADLEN(NFS4_STATEID_SIZE))
#define decode_stateid_maxsz	(XDR_QUADLEN(NFS4_STATEID_SIZE))
#define encode_verifier_maxsz	(XDR_QUADLEN(NFS4_VERIFIER_SIZE))
#define decode_verifier_maxsz	(XDR_QUADLEN(NFS4_VERIFIER_SIZE))
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#define encode_putfh_maxsz	(op_encode_hdr_maxsz + 1 + \
				(NFS4_FHSIZE >> 2))
#define decode_putfh_maxsz	(op_decode_hdr_maxsz)
#define encode_putrootfh_maxsz	(op_encode_hdr_maxsz)
#define decode_putrootfh_maxsz	(op_decode_hdr_maxsz)
#define encode_getfh_maxsz      (op_encode_hdr_maxsz)
#define decode_getfh_maxsz      (op_decode_hdr_maxsz + 1 + \
				((3+NFS4_FHSIZE) >> 2))
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#define nfs4_fattr_bitmap_maxsz 3
#define encode_getattr_maxsz    (op_encode_hdr_maxsz + nfs4_fattr_bitmap_maxsz)
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#define nfs4_name_maxsz		(1 + ((3 + NFS4_MAXNAMLEN) >> 2))
#define nfs4_path_maxsz		(1 + ((3 + NFS4_MAXPATHLEN) >> 2))
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#define nfs4_owner_maxsz	(1 + XDR_QUADLEN(IDMAP_NAMESZ))
#define nfs4_group_maxsz	(1 + XDR_QUADLEN(IDMAP_NAMESZ))
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/* This is based on getfattr, which uses the most attributes: */
#define nfs4_fattr_value_maxsz	(1 + (1 + 2 + 2 + 4 + 2 + 1 + 1 + 2 + 2 + \
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				3 + 3 + 3 + nfs4_owner_maxsz + nfs4_group_maxsz))
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#define nfs4_fattr_maxsz	(nfs4_fattr_bitmap_maxsz + \
				nfs4_fattr_value_maxsz)
#define decode_getattr_maxsz    (op_decode_hdr_maxsz + nfs4_fattr_maxsz)
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#define encode_attrs_maxsz	(nfs4_fattr_bitmap_maxsz + \
				 1 + 2 + 1 + \
				nfs4_owner_maxsz + \
				nfs4_group_maxsz + \
				4 + 4)
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#define encode_savefh_maxsz     (op_encode_hdr_maxsz)
#define decode_savefh_maxsz     (op_decode_hdr_maxsz)
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#define encode_restorefh_maxsz  (op_encode_hdr_maxsz)
#define decode_restorefh_maxsz  (op_decode_hdr_maxsz)
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#define encode_fsinfo_maxsz	(encode_getattr_maxsz)
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#define decode_fsinfo_maxsz	(op_decode_hdr_maxsz + 11)
#define encode_renew_maxsz	(op_encode_hdr_maxsz + 3)
#define decode_renew_maxsz	(op_decode_hdr_maxsz)
#define encode_setclientid_maxsz \
				(op_encode_hdr_maxsz + \
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				XDR_QUADLEN(NFS4_VERIFIER_SIZE) + \
				XDR_QUADLEN(NFS4_SETCLIENTID_NAMELEN) + \
				1 /* sc_prog */ + \
				XDR_QUADLEN(RPCBIND_MAXNETIDLEN) + \
				XDR_QUADLEN(RPCBIND_MAXUADDRLEN) + \
				1) /* sc_cb_ident */
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#define decode_setclientid_maxsz \
				(op_decode_hdr_maxsz + \
				2 + \
				1024) /* large value for CLID_INUSE */
#define encode_setclientid_confirm_maxsz \
				(op_encode_hdr_maxsz + \
				3 + (NFS4_VERIFIER_SIZE >> 2))
#define decode_setclientid_confirm_maxsz \
				(op_decode_hdr_maxsz)
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#define encode_lookup_maxsz	(op_encode_hdr_maxsz + nfs4_name_maxsz)
#define decode_lookup_maxsz	(op_decode_hdr_maxsz)
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#define encode_share_access_maxsz \
				(2)
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#define encode_createmode_maxsz	(1 + encode_attrs_maxsz + encode_verifier_maxsz)
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#define encode_opentype_maxsz	(1 + encode_createmode_maxsz)
#define encode_claim_null_maxsz	(1 + nfs4_name_maxsz)
#define encode_open_maxsz	(op_encode_hdr_maxsz + \
				2 + encode_share_access_maxsz + 2 + \
				open_owner_id_maxsz + \
				encode_opentype_maxsz + \
				encode_claim_null_maxsz)
#define decode_ace_maxsz	(3 + nfs4_owner_maxsz)
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#define decode_delegation_maxsz	(1 + decode_stateid_maxsz + 1 + \
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				decode_ace_maxsz)
#define decode_change_info_maxsz	(5)
#define decode_open_maxsz	(op_decode_hdr_maxsz + \
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				decode_stateid_maxsz + \
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				decode_change_info_maxsz + 1 + \
				nfs4_fattr_bitmap_maxsz + \
				decode_delegation_maxsz)
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#define encode_open_confirm_maxsz \
				(op_encode_hdr_maxsz + \
				 encode_stateid_maxsz + 1)
#define decode_open_confirm_maxsz \
				(op_decode_hdr_maxsz + \
				 decode_stateid_maxsz)
#define encode_open_downgrade_maxsz \
				(op_encode_hdr_maxsz + \
				 encode_stateid_maxsz + 1 + \
				 encode_share_access_maxsz)
#define decode_open_downgrade_maxsz \
				(op_decode_hdr_maxsz + \
				 decode_stateid_maxsz)
#define encode_close_maxsz	(op_encode_hdr_maxsz + \
				 1 + encode_stateid_maxsz)
#define decode_close_maxsz	(op_decode_hdr_maxsz + \
				 decode_stateid_maxsz)
#define encode_setattr_maxsz	(op_encode_hdr_maxsz + \
				 encode_stateid_maxsz + \
				 encode_attrs_maxsz)
#define decode_setattr_maxsz	(op_decode_hdr_maxsz + \
				 nfs4_fattr_bitmap_maxsz)
#define encode_read_maxsz	(op_encode_hdr_maxsz + \
				 encode_stateid_maxsz + 3)
#define decode_read_maxsz	(op_decode_hdr_maxsz + 2)
#define encode_readdir_maxsz	(op_encode_hdr_maxsz + \
				 2 + encode_verifier_maxsz + 5)
#define decode_readdir_maxsz	(op_decode_hdr_maxsz + \
				 decode_verifier_maxsz)
#define encode_readlink_maxsz	(op_encode_hdr_maxsz)
#define decode_readlink_maxsz	(op_decode_hdr_maxsz + 1)
#define encode_write_maxsz	(op_encode_hdr_maxsz + \
				 encode_stateid_maxsz + 4)
#define decode_write_maxsz	(op_decode_hdr_maxsz + \
				 2 + decode_verifier_maxsz)
#define encode_commit_maxsz	(op_encode_hdr_maxsz + 3)
#define decode_commit_maxsz	(op_decode_hdr_maxsz + \
				 decode_verifier_maxsz)
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#define encode_remove_maxsz	(op_encode_hdr_maxsz + \
				nfs4_name_maxsz)
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#define decode_remove_maxsz	(op_decode_hdr_maxsz + \
				 decode_change_info_maxsz)
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#define encode_rename_maxsz	(op_encode_hdr_maxsz + \
				2 * nfs4_name_maxsz)
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#define decode_rename_maxsz	(op_decode_hdr_maxsz + \
				 decode_change_info_maxsz + \
				 decode_change_info_maxsz)
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#define encode_link_maxsz	(op_encode_hdr_maxsz + \
				nfs4_name_maxsz)
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#define decode_link_maxsz	(op_decode_hdr_maxsz + decode_change_info_maxsz)
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#define encode_lockowner_maxsz	(7)
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#define encode_lock_maxsz	(op_encode_hdr_maxsz + \
				 7 + \
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				 1 + encode_stateid_maxsz + 1 + \
				 encode_lockowner_maxsz)
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#define decode_lock_denied_maxsz \
				(8 + decode_lockowner_maxsz)
#define decode_lock_maxsz	(op_decode_hdr_maxsz + \
				 decode_lock_denied_maxsz)
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#define encode_lockt_maxsz	(op_encode_hdr_maxsz + 5 + \
				encode_lockowner_maxsz)
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#define decode_lockt_maxsz	(op_decode_hdr_maxsz + \
				 decode_lock_denied_maxsz)
#define encode_locku_maxsz	(op_encode_hdr_maxsz + 3 + \
				 encode_stateid_maxsz + \
				 4)
#define decode_locku_maxsz	(op_decode_hdr_maxsz + \
				 decode_stateid_maxsz)
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#define encode_release_lockowner_maxsz \
				(op_encode_hdr_maxsz + \
				 encode_lockowner_maxsz)
#define decode_release_lockowner_maxsz \
				(op_decode_hdr_maxsz)
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#define encode_access_maxsz	(op_encode_hdr_maxsz + 1)
#define decode_access_maxsz	(op_decode_hdr_maxsz + 2)
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#define encode_symlink_maxsz	(op_encode_hdr_maxsz + \
				1 + nfs4_name_maxsz + \
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				1 + \
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				nfs4_fattr_maxsz)
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#define decode_symlink_maxsz	(op_decode_hdr_maxsz + 8)
#define encode_create_maxsz	(op_encode_hdr_maxsz + \
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				1 + 2 + nfs4_name_maxsz + \
				encode_attrs_maxsz)
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#define decode_create_maxsz	(op_decode_hdr_maxsz + \
				decode_change_info_maxsz + \
				nfs4_fattr_bitmap_maxsz)
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#define encode_statfs_maxsz	(encode_getattr_maxsz)
#define decode_statfs_maxsz	(decode_getattr_maxsz)
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#define encode_delegreturn_maxsz (op_encode_hdr_maxsz + 4)
#define decode_delegreturn_maxsz (op_decode_hdr_maxsz)
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#define encode_getacl_maxsz	(encode_getattr_maxsz)
#define decode_getacl_maxsz	(op_decode_hdr_maxsz + \
				 nfs4_fattr_bitmap_maxsz + 1)
#define encode_setacl_maxsz	(op_encode_hdr_maxsz + \
				 encode_stateid_maxsz + 3)
#define decode_setacl_maxsz	(decode_setattr_maxsz)
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#define encode_fs_locations_maxsz \
				(encode_getattr_maxsz)
#define decode_fs_locations_maxsz \
				(0)
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#if defined(CONFIG_NFS_V4_1)
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#define NFS4_MAX_MACHINE_NAME_LEN (64)

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#define encode_exchange_id_maxsz (op_encode_hdr_maxsz + \
				encode_verifier_maxsz + \
				1 /* co_ownerid.len */ + \
				XDR_QUADLEN(NFS4_EXCHANGE_ID_LEN) + \
				1 /* flags */ + \
				1 /* spa_how */ + \
				0 /* SP4_NONE (for now) */ + \
				1 /* zero implemetation id array */)
#define decode_exchange_id_maxsz (op_decode_hdr_maxsz + \
				2 /* eir_clientid */ + \
				1 /* eir_sequenceid */ + \
				1 /* eir_flags */ + \
				1 /* spr_how */ + \
				0 /* SP4_NONE (for now) */ + \
				2 /* eir_server_owner.so_minor_id */ + \
				/* eir_server_owner.so_major_id<> */ \
				XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 + \
				/* eir_server_scope<> */ \
				XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 + \
				1 /* eir_server_impl_id array length */ + \
				0 /* ignored eir_server_impl_id contents */)
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#define encode_channel_attrs_maxsz  (6 + 1 /* ca_rdma_ird.len (0) */)
#define decode_channel_attrs_maxsz  (6 + \
				     1 /* ca_rdma_ird.len */ + \
				     1 /* ca_rdma_ird */)
#define encode_create_session_maxsz  (op_encode_hdr_maxsz + \
				     2 /* csa_clientid */ + \
				     1 /* csa_sequence */ + \
				     1 /* csa_flags */ + \
				     encode_channel_attrs_maxsz + \
				     encode_channel_attrs_maxsz + \
				     1 /* csa_cb_program */ + \
				     1 /* csa_sec_parms.len (1) */ + \
				     1 /* cb_secflavor (AUTH_SYS) */ + \
				     1 /* stamp */ + \
				     1 /* machinename.len */ + \
				     XDR_QUADLEN(NFS4_MAX_MACHINE_NAME_LEN) + \
				     1 /* uid */ + \
				     1 /* gid */ + \
				     1 /* gids.len (0) */)
#define decode_create_session_maxsz  (op_decode_hdr_maxsz +	\
				     XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \
				     1 /* csr_sequence */ + \
				     1 /* csr_flags */ + \
				     decode_channel_attrs_maxsz + \
				     decode_channel_attrs_maxsz)
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#define encode_destroy_session_maxsz    (op_encode_hdr_maxsz + 4)
#define decode_destroy_session_maxsz    (op_decode_hdr_maxsz)
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#define encode_sequence_maxsz	(op_encode_hdr_maxsz + \
				XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + 4)
#define decode_sequence_maxsz	(op_decode_hdr_maxsz + \
				XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + 5)
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#define encode_reclaim_complete_maxsz	(op_encode_hdr_maxsz + 4)
#define decode_reclaim_complete_maxsz	(op_decode_hdr_maxsz + 4)
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#else /* CONFIG_NFS_V4_1 */
#define encode_sequence_maxsz	0
#define decode_sequence_maxsz	0
#endif /* CONFIG_NFS_V4_1 */

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#define NFS4_enc_compound_sz	(1024)  /* XXX: large enough? */
#define NFS4_dec_compound_sz	(1024)  /* XXX: large enough? */
#define NFS4_enc_read_sz	(compound_encode_hdr_maxsz + \
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				encode_sequence_maxsz + \
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				encode_putfh_maxsz + \
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				encode_read_maxsz)
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#define NFS4_dec_read_sz	(compound_decode_hdr_maxsz + \
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				decode_sequence_maxsz + \
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				decode_putfh_maxsz + \
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				decode_read_maxsz)
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#define NFS4_enc_readlink_sz	(compound_encode_hdr_maxsz + \
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				encode_sequence_maxsz + \
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				encode_putfh_maxsz + \
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				encode_readlink_maxsz)
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#define NFS4_dec_readlink_sz	(compound_decode_hdr_maxsz + \
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				decode_sequence_maxsz + \
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				decode_putfh_maxsz + \
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				decode_readlink_maxsz)
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#define NFS4_enc_readdir_sz	(compound_encode_hdr_maxsz + \
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				encode_sequence_maxsz + \
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				encode_putfh_maxsz + \
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				encode_readdir_maxsz)
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#define NFS4_dec_readdir_sz	(compound_decode_hdr_maxsz + \
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				decode_sequence_maxsz + \
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				decode_putfh_maxsz + \
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				decode_readdir_maxsz)
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#define NFS4_enc_write_sz	(compound_encode_hdr_maxsz + \
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				encode_sequence_maxsz + \
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				encode_putfh_maxsz + \
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				encode_write_maxsz + \
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				encode_getattr_maxsz)
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#define NFS4_dec_write_sz	(compound_decode_hdr_maxsz + \
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				decode_sequence_maxsz + \
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				decode_putfh_maxsz + \
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				decode_write_maxsz + \
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				decode_getattr_maxsz)
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#define NFS4_enc_commit_sz	(compound_encode_hdr_maxsz + \
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				encode_sequence_maxsz + \
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				encode_putfh_maxsz + \
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				encode_commit_maxsz + \
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				encode_getattr_maxsz)
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#define NFS4_dec_commit_sz	(compound_decode_hdr_maxsz + \
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				decode_sequence_maxsz + \
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				decode_putfh_maxsz + \
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				decode_commit_maxsz + \
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				decode_getattr_maxsz)
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#define NFS4_enc_open_sz        (compound_encode_hdr_maxsz + \
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				encode_sequence_maxsz + \
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				encode_putfh_maxsz + \
				encode_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_sequence_maxsz + \
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				decode_putfh_maxsz + \
				decode_savefh_maxsz + \
				decode_open_maxsz + \
				decode_getfh_maxsz + \
				decode_getattr_maxsz + \
				decode_restorefh_maxsz + \
				decode_getattr_maxsz)
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#define NFS4_enc_open_confirm_sz \
				(compound_encode_hdr_maxsz + \
				 encode_putfh_maxsz + \
				 encode_open_confirm_maxsz)
#define NFS4_dec_open_confirm_sz \
				(compound_decode_hdr_maxsz + \
				 decode_putfh_maxsz + \
				 decode_open_confirm_maxsz)
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#define NFS4_enc_open_noattr_sz	(compound_encode_hdr_maxsz + \
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					encode_sequence_maxsz + \
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					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 + \
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					decode_sequence_maxsz + \
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					decode_putfh_maxsz + \
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					decode_open_maxsz + \
					decode_getattr_maxsz)
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#define NFS4_enc_open_downgrade_sz \
				(compound_encode_hdr_maxsz + \
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				 encode_sequence_maxsz + \
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				 encode_putfh_maxsz + \
				 encode_open_downgrade_maxsz + \
				 encode_getattr_maxsz)
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#define NFS4_dec_open_downgrade_sz \
				(compound_decode_hdr_maxsz + \
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				 decode_sequence_maxsz + \
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				 decode_putfh_maxsz + \
				 decode_open_downgrade_maxsz + \
				 decode_getattr_maxsz)
#define NFS4_enc_close_sz	(compound_encode_hdr_maxsz + \
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				 encode_sequence_maxsz + \
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				 encode_putfh_maxsz + \
				 encode_close_maxsz + \
				 encode_getattr_maxsz)
#define NFS4_dec_close_sz	(compound_decode_hdr_maxsz + \
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				 decode_sequence_maxsz + \
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				 decode_putfh_maxsz + \
				 decode_close_maxsz + \
				 decode_getattr_maxsz)
#define NFS4_enc_setattr_sz	(compound_encode_hdr_maxsz + \
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				 encode_sequence_maxsz + \
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				 encode_putfh_maxsz + \
				 encode_setattr_maxsz + \
				 encode_getattr_maxsz)
#define NFS4_dec_setattr_sz	(compound_decode_hdr_maxsz + \
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				 decode_sequence_maxsz + \
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				 decode_putfh_maxsz + \
				 decode_setattr_maxsz + \
				 decode_getattr_maxsz)
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#define NFS4_enc_fsinfo_sz	(compound_encode_hdr_maxsz + \
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				encode_sequence_maxsz + \
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				encode_putfh_maxsz + \
				encode_fsinfo_maxsz)
#define NFS4_dec_fsinfo_sz	(compound_decode_hdr_maxsz + \
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				decode_sequence_maxsz + \
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				decode_putfh_maxsz + \
				decode_fsinfo_maxsz)
#define NFS4_enc_renew_sz	(compound_encode_hdr_maxsz + \
				encode_renew_maxsz)
#define NFS4_dec_renew_sz	(compound_decode_hdr_maxsz + \
				decode_renew_maxsz)
#define NFS4_enc_setclientid_sz	(compound_encode_hdr_maxsz + \
				encode_setclientid_maxsz)
#define NFS4_dec_setclientid_sz	(compound_decode_hdr_maxsz + \
				decode_setclientid_maxsz)
#define NFS4_enc_setclientid_confirm_sz \
				(compound_encode_hdr_maxsz + \
				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 + \
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				encode_sequence_maxsz + \
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				encode_putfh_maxsz + \
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				encode_lock_maxsz)
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#define NFS4_dec_lock_sz        (compound_decode_hdr_maxsz + \
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				decode_sequence_maxsz + \
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				decode_putfh_maxsz + \
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				decode_lock_maxsz)
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#define NFS4_enc_lockt_sz       (compound_encode_hdr_maxsz + \
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				encode_sequence_maxsz + \
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				encode_putfh_maxsz + \
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				encode_lockt_maxsz)
#define NFS4_dec_lockt_sz       (compound_decode_hdr_maxsz + \
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				 decode_sequence_maxsz + \
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				 decode_putfh_maxsz + \
				 decode_lockt_maxsz)
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#define NFS4_enc_locku_sz       (compound_encode_hdr_maxsz + \
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				encode_sequence_maxsz + \
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				encode_putfh_maxsz + \
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				encode_locku_maxsz)
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#define NFS4_dec_locku_sz       (compound_decode_hdr_maxsz + \
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				decode_sequence_maxsz + \
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				decode_putfh_maxsz + \
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				decode_locku_maxsz)
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#define NFS4_enc_release_lockowner_sz \
				(compound_encode_hdr_maxsz + \
				 encode_lockowner_maxsz)
#define NFS4_dec_release_lockowner_sz \
				(compound_decode_hdr_maxsz + \
				 decode_lockowner_maxsz)
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#define NFS4_enc_access_sz	(compound_encode_hdr_maxsz + \
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				encode_sequence_maxsz + \
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				encode_putfh_maxsz + \
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				encode_access_maxsz + \
				encode_getattr_maxsz)
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#define NFS4_dec_access_sz	(compound_decode_hdr_maxsz + \
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				decode_sequence_maxsz + \
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				decode_putfh_maxsz + \
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				decode_access_maxsz + \
				decode_getattr_maxsz)
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#define NFS4_enc_getattr_sz	(compound_encode_hdr_maxsz + \
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				encode_sequence_maxsz + \
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				encode_putfh_maxsz + \
				encode_getattr_maxsz)
#define NFS4_dec_getattr_sz	(compound_decode_hdr_maxsz + \
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				decode_sequence_maxsz + \
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				decode_putfh_maxsz + \
				decode_getattr_maxsz)
#define NFS4_enc_lookup_sz	(compound_encode_hdr_maxsz + \
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				encode_sequence_maxsz + \
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				encode_putfh_maxsz + \
				encode_lookup_maxsz + \
				encode_getattr_maxsz + \
				encode_getfh_maxsz)
#define NFS4_dec_lookup_sz	(compound_decode_hdr_maxsz + \
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				decode_sequence_maxsz + \
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				decode_putfh_maxsz + \
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				decode_lookup_maxsz + \
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				decode_getattr_maxsz + \
				decode_getfh_maxsz)
#define NFS4_enc_lookup_root_sz (compound_encode_hdr_maxsz + \
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				encode_sequence_maxsz + \
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				encode_putrootfh_maxsz + \
				encode_getattr_maxsz + \
				encode_getfh_maxsz)
#define NFS4_dec_lookup_root_sz (compound_decode_hdr_maxsz + \
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				decode_sequence_maxsz + \
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				decode_putrootfh_maxsz + \
				decode_getattr_maxsz + \
				decode_getfh_maxsz)
#define NFS4_enc_remove_sz	(compound_encode_hdr_maxsz + \
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				encode_sequence_maxsz + \
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				encode_putfh_maxsz + \
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				encode_remove_maxsz + \
				encode_getattr_maxsz)
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#define NFS4_dec_remove_sz	(compound_decode_hdr_maxsz + \
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				decode_sequence_maxsz + \
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				decode_putfh_maxsz + \
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				decode_remove_maxsz + \
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				decode_getattr_maxsz)
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#define NFS4_enc_rename_sz	(compound_encode_hdr_maxsz + \
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				encode_sequence_maxsz + \
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				encode_putfh_maxsz + \
				encode_savefh_maxsz + \
				encode_putfh_maxsz + \
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				encode_rename_maxsz + \
				encode_getattr_maxsz + \
				encode_restorefh_maxsz + \
				encode_getattr_maxsz)
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#define NFS4_dec_rename_sz	(compound_decode_hdr_maxsz + \
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				decode_sequence_maxsz + \
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				decode_putfh_maxsz + \
				decode_savefh_maxsz + \
				decode_putfh_maxsz + \
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				decode_rename_maxsz + \
				decode_getattr_maxsz + \
				decode_restorefh_maxsz + \
				decode_getattr_maxsz)
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#define NFS4_enc_link_sz	(compound_encode_hdr_maxsz + \
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				encode_sequence_maxsz + \
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				encode_putfh_maxsz + \
				encode_savefh_maxsz + \
				encode_putfh_maxsz + \
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				encode_link_maxsz + \
				decode_getattr_maxsz + \
				encode_restorefh_maxsz + \
				decode_getattr_maxsz)
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#define NFS4_dec_link_sz	(compound_decode_hdr_maxsz + \
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				decode_sequence_maxsz + \
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				decode_putfh_maxsz + \
				decode_savefh_maxsz + \
				decode_putfh_maxsz + \
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				decode_link_maxsz + \
				decode_getattr_maxsz + \
				decode_restorefh_maxsz + \
				decode_getattr_maxsz)
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#define NFS4_enc_symlink_sz	(compound_encode_hdr_maxsz + \
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				encode_sequence_maxsz + \
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				encode_putfh_maxsz + \
				encode_symlink_maxsz + \
				encode_getattr_maxsz + \
				encode_getfh_maxsz)
#define NFS4_dec_symlink_sz	(compound_decode_hdr_maxsz + \
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				decode_sequence_maxsz + \
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				decode_putfh_maxsz + \
				decode_symlink_maxsz + \
				decode_getattr_maxsz + \
				decode_getfh_maxsz)
#define NFS4_enc_create_sz	(compound_encode_hdr_maxsz + \
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				encode_sequence_maxsz + \
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				encode_putfh_maxsz + \
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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 + \
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				decode_sequence_maxsz + \
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				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 + \
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				encode_sequence_maxsz + \
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				encode_putfh_maxsz + \
				encode_getattr_maxsz)
#define NFS4_dec_pathconf_sz	(compound_decode_hdr_maxsz + \
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				decode_sequence_maxsz + \
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				decode_putfh_maxsz + \
				decode_getattr_maxsz)
#define NFS4_enc_statfs_sz	(compound_encode_hdr_maxsz + \
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				encode_sequence_maxsz + \
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				encode_putfh_maxsz + \
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				encode_statfs_maxsz)
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#define NFS4_dec_statfs_sz	(compound_decode_hdr_maxsz + \
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				decode_sequence_maxsz + \
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				decode_putfh_maxsz + \
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				decode_statfs_maxsz)
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#define NFS4_enc_server_caps_sz (compound_encode_hdr_maxsz + \
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				encode_sequence_maxsz + \
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				encode_putfh_maxsz + \
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				encode_getattr_maxsz)
#define NFS4_dec_server_caps_sz (compound_decode_hdr_maxsz + \
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				decode_sequence_maxsz + \
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				decode_putfh_maxsz + \
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				decode_getattr_maxsz)
#define NFS4_enc_delegreturn_sz	(compound_encode_hdr_maxsz + \
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				encode_sequence_maxsz + \
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				encode_putfh_maxsz + \
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				encode_delegreturn_maxsz + \
				encode_getattr_maxsz)
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#define NFS4_dec_delegreturn_sz (compound_decode_hdr_maxsz + \
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				decode_sequence_maxsz + \
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				decode_delegreturn_maxsz + \
				decode_getattr_maxsz)
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#define NFS4_enc_getacl_sz	(compound_encode_hdr_maxsz + \
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				encode_sequence_maxsz + \
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				encode_putfh_maxsz + \
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				encode_getacl_maxsz)
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#define NFS4_dec_getacl_sz	(compound_decode_hdr_maxsz + \
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				decode_sequence_maxsz + \
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				decode_putfh_maxsz + \
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				decode_getacl_maxsz)
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#define NFS4_enc_setacl_sz	(compound_encode_hdr_maxsz + \
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				encode_sequence_maxsz + \
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				encode_putfh_maxsz + \
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				encode_setacl_maxsz)
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#define NFS4_dec_setacl_sz	(compound_decode_hdr_maxsz + \
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				decode_sequence_maxsz + \
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				decode_putfh_maxsz + \
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				decode_setacl_maxsz)
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#define NFS4_enc_fs_locations_sz \
				(compound_encode_hdr_maxsz + \
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				 encode_sequence_maxsz + \
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				 encode_putfh_maxsz + \
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				 encode_lookup_maxsz + \
				 encode_fs_locations_maxsz)
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#define NFS4_dec_fs_locations_sz \
				(compound_decode_hdr_maxsz + \
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				 decode_sequence_maxsz + \
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				 decode_putfh_maxsz + \
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				 decode_lookup_maxsz + \
				 decode_fs_locations_maxsz)
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#if defined(CONFIG_NFS_V4_1)
#define NFS4_enc_exchange_id_sz \
				(compound_encode_hdr_maxsz + \
				 encode_exchange_id_maxsz)
#define NFS4_dec_exchange_id_sz \
				(compound_decode_hdr_maxsz + \
				 decode_exchange_id_maxsz)
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#define NFS4_enc_create_session_sz \
				(compound_encode_hdr_maxsz + \
				 encode_create_session_maxsz)
#define NFS4_dec_create_session_sz \
				(compound_decode_hdr_maxsz + \
				 decode_create_session_maxsz)
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#define NFS4_enc_destroy_session_sz	(compound_encode_hdr_maxsz + \
					 encode_destroy_session_maxsz)
#define NFS4_dec_destroy_session_sz	(compound_decode_hdr_maxsz + \
					 decode_destroy_session_maxsz)
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#define NFS4_enc_sequence_sz \
				(compound_decode_hdr_maxsz + \
				 encode_sequence_maxsz)
#define NFS4_dec_sequence_sz \
				(compound_decode_hdr_maxsz + \
				 decode_sequence_maxsz)
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#define NFS4_enc_get_lease_time_sz	(compound_encode_hdr_maxsz + \
					 encode_sequence_maxsz + \
					 encode_putrootfh_maxsz + \
					 encode_fsinfo_maxsz)
#define NFS4_dec_get_lease_time_sz	(compound_decode_hdr_maxsz + \
					 decode_sequence_maxsz + \
					 decode_putrootfh_maxsz + \
					 decode_fsinfo_maxsz)
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#define NFS4_enc_reclaim_complete_sz	(compound_encode_hdr_maxsz + \
					 encode_sequence_maxsz + \
					 encode_reclaim_complete_maxsz)
#define NFS4_dec_reclaim_complete_sz	(compound_decode_hdr_maxsz + \
					 decode_sequence_maxsz + \
					 decode_reclaim_complete_maxsz)
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const u32 nfs41_maxwrite_overhead = ((RPC_MAX_HEADER_WITH_AUTH +
				      compound_encode_hdr_maxsz +
				      encode_sequence_maxsz +
				      encode_putfh_maxsz +
				      encode_getattr_maxsz) *
				     XDR_UNIT);

const u32 nfs41_maxread_overhead = ((RPC_MAX_HEADER_WITH_AUTH +
				     compound_decode_hdr_maxsz +
				     decode_sequence_maxsz +
				     decode_putfh_maxsz) *
				    XDR_UNIT);
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#endif /* CONFIG_NFS_V4_1 */
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static const umode_t nfs_type2fmt[] = {
	[NF4BAD] = 0,
	[NF4REG] = S_IFREG,
	[NF4DIR] = S_IFDIR,
	[NF4BLK] = S_IFBLK,
	[NF4CHR] = S_IFCHR,
	[NF4LNK] = S_IFLNK,
	[NF4SOCK] = S_IFSOCK,
	[NF4FIFO] = S_IFIFO,
	[NF4ATTRDIR] = 0,
	[NF4NAMEDATTR] = 0,
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};

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

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

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static void encode_compound_hdr(struct xdr_stream *xdr,
				struct rpc_rqst *req,
				struct compound_hdr *hdr)
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{
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	__be32 *p;
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	struct rpc_auth *auth = req->rq_cred->cr_auth;
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	/* initialize running count of expected bytes in reply.
	 * NOTE: the replied tag SHOULD be the same is the one sent,
	 * but this is not required as a MUST for the server to do so. */
	hdr->replen = RPC_REPHDRSIZE + auth->au_rslack + 3 + hdr->taglen;
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	dprintk("encode_compound: tag=%.*s\n", (int)hdr->taglen, hdr->tag);
	BUG_ON(hdr->taglen > NFS4_MAXTAGLEN);
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	p = reserve_space(xdr, 4 + hdr->taglen + 8);
	p = xdr_encode_opaque(p, hdr->tag, hdr->taglen);
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	*p++ = cpu_to_be32(hdr->minorversion);
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	hdr->nops_p = p;
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	*p = cpu_to_be32(hdr->nops);
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}

static void encode_nops(struct compound_hdr *hdr)
{
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	BUG_ON(hdr->nops > NFS4_MAX_OPS);
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	*hdr->nops_p = htonl(hdr->nops);
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}

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

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static void encode_attrs(struct xdr_stream *xdr, const struct iattr *iap, const struct nfs_server *server)
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{
	char owner_name[IDMAP_NAMESZ];
	char owner_group[IDMAP_NAMESZ];
	int owner_namelen = 0;
	int owner_grouplen = 0;
A
Al Viro 已提交
798 799
	__be32 *p;
	__be32 *q;
L
Linus Torvalds 已提交
800 801 802 803 804 805 806 807 808
	int len;
	uint32_t bmval0 = 0;
	uint32_t bmval1 = 0;

	/*
	 * We reserve enough space to write the entire attribute buffer at once.
	 * In the worst-case, this would be
	 *   12(bitmap) + 4(attrlen) + 8(size) + 4(mode) + 4(atime) + 4(mtime)
	 *          = 36 bytes, plus any contribution from variable-length fields
809
	 *            such as owner/group.
L
Linus Torvalds 已提交
810 811 812 813 814 815 816 817 818
	 */
	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) {
B
Bryan Schumaker 已提交
819
		owner_namelen = nfs_map_uid_to_name(server->nfs_client, iap->ia_uid, owner_name, IDMAP_NAMESZ);
L
Linus Torvalds 已提交
820
		if (owner_namelen < 0) {
821 822
			dprintk("nfs: couldn't resolve uid %d to string\n",
					iap->ia_uid);
L
Linus Torvalds 已提交
823 824 825 826 827 828 829 830
			/* 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) {
B
Bryan Schumaker 已提交
831
		owner_grouplen = nfs_map_gid_to_group(server->nfs_client, iap->ia_gid, owner_group, IDMAP_NAMESZ);
L
Linus Torvalds 已提交
832
		if (owner_grouplen < 0) {
833 834
			dprintk("nfs: couldn't resolve gid %d to string\n",
					iap->ia_gid);
L
Linus Torvalds 已提交
835 836 837 838 839 840 841 842 843 844 845 846 847 848
			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;
849
	p = reserve_space(xdr, len);
L
Linus Torvalds 已提交
850 851 852 853 854

	/*
	 * We write the bitmap length now, but leave the bitmap and the attribute
	 * buffer length to be backfilled at the end of this routine.
	 */
B
Benny Halevy 已提交
855
	*p++ = cpu_to_be32(2);
L
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856 857 858 859 860
	q = p;
	p += 3;

	if (iap->ia_valid & ATTR_SIZE) {
		bmval0 |= FATTR4_WORD0_SIZE;
B
Benny Halevy 已提交
861
		p = xdr_encode_hyper(p, iap->ia_size);
L
Linus Torvalds 已提交
862 863 864
	}
	if (iap->ia_valid & ATTR_MODE) {
		bmval1 |= FATTR4_WORD1_MODE;
B
Benny Halevy 已提交
865
		*p++ = cpu_to_be32(iap->ia_mode & S_IALLUGO);
L
Linus Torvalds 已提交
866 867 868
	}
	if (iap->ia_valid & ATTR_UID) {
		bmval1 |= FATTR4_WORD1_OWNER;
869
		p = xdr_encode_opaque(p, owner_name, owner_namelen);
L
Linus Torvalds 已提交
870 871 872
	}
	if (iap->ia_valid & ATTR_GID) {
		bmval1 |= FATTR4_WORD1_OWNER_GROUP;
873
		p = xdr_encode_opaque(p, owner_group, owner_grouplen);
L
Linus Torvalds 已提交
874 875 876
	}
	if (iap->ia_valid & ATTR_ATIME_SET) {
		bmval1 |= FATTR4_WORD1_TIME_ACCESS_SET;
B
Benny Halevy 已提交
877 878
		*p++ = cpu_to_be32(NFS4_SET_TO_CLIENT_TIME);
		*p++ = cpu_to_be32(0);
879 880
		*p++ = cpu_to_be32(iap->ia_atime.tv_sec);
		*p++ = cpu_to_be32(iap->ia_atime.tv_nsec);
L
Linus Torvalds 已提交
881 882 883
	}
	else if (iap->ia_valid & ATTR_ATIME) {
		bmval1 |= FATTR4_WORD1_TIME_ACCESS_SET;
B
Benny Halevy 已提交
884
		*p++ = cpu_to_be32(NFS4_SET_TO_SERVER_TIME);
L
Linus Torvalds 已提交
885 886 887
	}
	if (iap->ia_valid & ATTR_MTIME_SET) {
		bmval1 |= FATTR4_WORD1_TIME_MODIFY_SET;
B
Benny Halevy 已提交
888 889 890 891
		*p++ = cpu_to_be32(NFS4_SET_TO_CLIENT_TIME);
		*p++ = cpu_to_be32(0);
		*p++ = cpu_to_be32(iap->ia_mtime.tv_sec);
		*p++ = cpu_to_be32(iap->ia_mtime.tv_nsec);
L
Linus Torvalds 已提交
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	}
	else if (iap->ia_valid & ATTR_MTIME) {
		bmval1 |= FATTR4_WORD1_TIME_MODIFY_SET;
B
Benny Halevy 已提交
895
		*p++ = cpu_to_be32(NFS4_SET_TO_SERVER_TIME);
L
Linus Torvalds 已提交
896
	}
897

L
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898 899 900 901
	/*
	 * Now we backfill the bitmap and the attribute buffer length.
	 */
	if (len != ((char *)p - (char *)q) + 4) {
902
		printk(KERN_ERR "nfs: Attr length error, %u != %Zu\n",
L
Linus Torvalds 已提交
903 904 905 906 907 908
				len, ((char *)p - (char *)q) + 4);
		BUG();
	}
	len = (char *)p - (char *)q - 12;
	*q++ = htonl(bmval0);
	*q++ = htonl(bmval1);
909
	*q = htonl(len);
L
Linus Torvalds 已提交
910 911 912 913

/* out: */
}

914
static void encode_access(struct xdr_stream *xdr, u32 access, struct compound_hdr *hdr)
L
Linus Torvalds 已提交
915
{
A
Al Viro 已提交
916
	__be32 *p;
L
Linus Torvalds 已提交
917

918
	p = reserve_space(xdr, 8);
B
Benny Halevy 已提交
919
	*p++ = cpu_to_be32(OP_ACCESS);
920
	*p = cpu_to_be32(access);
921
	hdr->nops++;
922
	hdr->replen += decode_access_maxsz;
L
Linus Torvalds 已提交
923 924
}

925
static void encode_close(struct xdr_stream *xdr, const struct nfs_closeargs *arg, struct compound_hdr *hdr)
L
Linus Torvalds 已提交
926
{
A
Al Viro 已提交
927
	__be32 *p;
L
Linus Torvalds 已提交
928

929
	p = reserve_space(xdr, 8+NFS4_STATEID_SIZE);
B
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930 931
	*p++ = cpu_to_be32(OP_CLOSE);
	*p++ = cpu_to_be32(arg->seqid->sequence->counter);
932
	xdr_encode_opaque_fixed(p, arg->stateid->data, NFS4_STATEID_SIZE);
933
	hdr->nops++;
934
	hdr->replen += decode_close_maxsz;
L
Linus Torvalds 已提交
935 936
}

937
static void encode_commit(struct xdr_stream *xdr, const struct nfs_writeargs *args, struct compound_hdr *hdr)
L
Linus Torvalds 已提交
938
{
A
Al Viro 已提交
939
	__be32 *p;
940

941
	p = reserve_space(xdr, 16);
B
Benny Halevy 已提交
942
	*p++ = cpu_to_be32(OP_COMMIT);
B
Benny Halevy 已提交
943
	p = xdr_encode_hyper(p, args->offset);
944
	*p = cpu_to_be32(args->count);
945
	hdr->nops++;
946
	hdr->replen += decode_commit_maxsz;
L
Linus Torvalds 已提交
947 948
}

949
static void encode_create(struct xdr_stream *xdr, const struct nfs4_create_arg *create, struct compound_hdr *hdr)
L
Linus Torvalds 已提交
950
{
A
Al Viro 已提交
951
	__be32 *p;
952

953
	p = reserve_space(xdr, 8);
B
Benny Halevy 已提交
954
	*p++ = cpu_to_be32(OP_CREATE);
955
	*p = cpu_to_be32(create->ftype);
L
Linus Torvalds 已提交
956 957 958

	switch (create->ftype) {
	case NF4LNK:
959
		p = reserve_space(xdr, 4);
960
		*p = cpu_to_be32(create->u.symlink.len);
961
		xdr_write_pages(xdr, create->u.symlink.pages, 0, create->u.symlink.len);
L
Linus Torvalds 已提交
962 963 964
		break;

	case NF4BLK: case NF4CHR:
965
		p = reserve_space(xdr, 8);
B
Benny Halevy 已提交
966
		*p++ = cpu_to_be32(create->u.device.specdata1);
967
		*p = cpu_to_be32(create->u.device.specdata2);
L
Linus Torvalds 已提交
968 969 970 971 972 973
		break;

	default:
		break;
	}

974
	encode_string(xdr, create->name->len, create->name->name);
975
	hdr->nops++;
976
	hdr->replen += decode_create_maxsz;
L
Linus Torvalds 已提交
977

978
	encode_attrs(xdr, create->attrs, create->server);
L
Linus Torvalds 已提交
979 980
}

981
static void encode_getattr_one(struct xdr_stream *xdr, uint32_t bitmap, struct compound_hdr *hdr)
L
Linus Torvalds 已提交
982
{
A
Andy Adamson 已提交
983
	__be32 *p;
L
Linus Torvalds 已提交
984

985
	p = reserve_space(xdr, 12);
B
Benny Halevy 已提交
986 987
	*p++ = cpu_to_be32(OP_GETATTR);
	*p++ = cpu_to_be32(1);
988
	*p = cpu_to_be32(bitmap);
989
	hdr->nops++;
990
	hdr->replen += decode_getattr_maxsz;
L
Linus Torvalds 已提交
991 992
}

993
static void encode_getattr_two(struct xdr_stream *xdr, uint32_t bm0, uint32_t bm1, struct compound_hdr *hdr)
L
Linus Torvalds 已提交
994
{
A
Andy Adamson 已提交
995
	__be32 *p;
L
Linus Torvalds 已提交
996

997
	p = reserve_space(xdr, 16);
B
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998 999 1000
	*p++ = cpu_to_be32(OP_GETATTR);
	*p++ = cpu_to_be32(2);
	*p++ = cpu_to_be32(bm0);
1001
	*p = cpu_to_be32(bm1);
1002
	hdr->nops++;
1003
	hdr->replen += decode_getattr_maxsz;
L
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1004 1005
}

1006
static void encode_getfattr(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
L
Linus Torvalds 已提交
1007
{
1008 1009
	encode_getattr_two(xdr, bitmask[0] & nfs4_fattr_bitmap[0],
			   bitmask[1] & nfs4_fattr_bitmap[1], hdr);
L
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1010 1011
}

1012
static void encode_fsinfo(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
L
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1013
{
1014 1015
	encode_getattr_two(xdr, bitmask[0] & nfs4_fsinfo_bitmap[0],
			   bitmask[1] & nfs4_fsinfo_bitmap[1], hdr);
L
Linus Torvalds 已提交
1016 1017
}

1018
static void encode_fs_locations(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
1019
{
1020 1021
	encode_getattr_two(xdr, bitmask[0] & nfs4_fs_locations_bitmap[0],
			   bitmask[1] & nfs4_fs_locations_bitmap[1], hdr);
1022 1023
}

1024
static void encode_getfh(struct xdr_stream *xdr, struct compound_hdr *hdr)
L
Linus Torvalds 已提交
1025
{
A
Al Viro 已提交
1026
	__be32 *p;
L
Linus Torvalds 已提交
1027

1028
	p = reserve_space(xdr, 4);
1029
	*p = cpu_to_be32(OP_GETFH);
1030
	hdr->nops++;
1031
	hdr->replen += decode_getfh_maxsz;
L
Linus Torvalds 已提交
1032 1033
}

1034
static void encode_link(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
L
Linus Torvalds 已提交
1035
{
A
Al Viro 已提交
1036
	__be32 *p;
L
Linus Torvalds 已提交
1037

1038
	p = reserve_space(xdr, 8 + name->len);
B
Benny Halevy 已提交
1039
	*p++ = cpu_to_be32(OP_LINK);
1040
	xdr_encode_opaque(p, name->name, name->len);
1041
	hdr->nops++;
1042
	hdr->replen += decode_link_maxsz;
L
Linus Torvalds 已提交
1043 1044
}

T
Trond Myklebust 已提交
1045 1046 1047 1048 1049 1050 1051 1052 1053 1054 1055 1056 1057 1058
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;
}

1059 1060 1061 1062 1063 1064 1065 1066 1067 1068 1069
static void encode_lockowner(struct xdr_stream *xdr, const struct nfs_lowner *lowner)
{
	__be32 *p;

	p = reserve_space(xdr, 28);
	p = xdr_encode_hyper(p, lowner->clientid);
	*p++ = cpu_to_be32(16);
	p = xdr_encode_opaque_fixed(p, "lock id:", 8);
	xdr_encode_hyper(p, lowner->id);
}

L
Linus Torvalds 已提交
1070 1071 1072 1073
/*
 * opcode,type,reclaim,offset,length,new_lock_owner = 32
 * open_seqid,open_stateid,lock_seqid,lock_owner.clientid, lock_owner.id = 40
 */
1074
static void encode_lock(struct xdr_stream *xdr, const struct nfs_lock_args *args, struct compound_hdr *hdr)
L
Linus Torvalds 已提交
1075
{
A
Al Viro 已提交
1076
	__be32 *p;
L
Linus Torvalds 已提交
1077

1078
	p = reserve_space(xdr, 32);
B
Benny Halevy 已提交
1079 1080 1081
	*p++ = cpu_to_be32(OP_LOCK);
	*p++ = cpu_to_be32(nfs4_lock_type(args->fl, args->block));
	*p++ = cpu_to_be32(args->reclaim);
B
Benny Halevy 已提交
1082 1083
	p = xdr_encode_hyper(p, args->fl->fl_start);
	p = xdr_encode_hyper(p, nfs4_lock_length(args->fl));
1084
	*p = cpu_to_be32(args->new_lock_owner);
T
Trond Myklebust 已提交
1085
	if (args->new_lock_owner){
1086
		p = reserve_space(xdr, 4+NFS4_STATEID_SIZE+4);
B
Benny Halevy 已提交
1087
		*p++ = cpu_to_be32(args->open_seqid->sequence->counter);
B
Benny Halevy 已提交
1088
		p = xdr_encode_opaque_fixed(p, args->open_stateid->data, NFS4_STATEID_SIZE);
B
Benny Halevy 已提交
1089
		*p++ = cpu_to_be32(args->lock_seqid->sequence->counter);
1090
		encode_lockowner(xdr, &args->lock_owner);
L
Linus Torvalds 已提交
1091 1092
	}
	else {
1093
		p = reserve_space(xdr, NFS4_STATEID_SIZE+4);
B
Benny Halevy 已提交
1094
		p = xdr_encode_opaque_fixed(p, args->lock_stateid->data, NFS4_STATEID_SIZE);
1095
		*p = cpu_to_be32(args->lock_seqid->sequence->counter);
L
Linus Torvalds 已提交
1096
	}
1097
	hdr->nops++;
1098
	hdr->replen += decode_lock_maxsz;
L
Linus Torvalds 已提交
1099 1100
}

1101
static void encode_lockt(struct xdr_stream *xdr, const struct nfs_lockt_args *args, struct compound_hdr *hdr)
L
Linus Torvalds 已提交
1102
{
A
Al Viro 已提交
1103
	__be32 *p;
L
Linus Torvalds 已提交
1104

1105
	p = reserve_space(xdr, 24);
B
Benny Halevy 已提交
1106 1107
	*p++ = cpu_to_be32(OP_LOCKT);
	*p++ = cpu_to_be32(nfs4_lock_type(args->fl, 0));
B
Benny Halevy 已提交
1108 1109
	p = xdr_encode_hyper(p, args->fl->fl_start);
	p = xdr_encode_hyper(p, nfs4_lock_length(args->fl));
1110
	encode_lockowner(xdr, &args->lock_owner);
1111
	hdr->nops++;
1112
	hdr->replen += decode_lockt_maxsz;
L
Linus Torvalds 已提交
1113 1114
}

1115
static void encode_locku(struct xdr_stream *xdr, const struct nfs_locku_args *args, struct compound_hdr *hdr)
L
Linus Torvalds 已提交
1116
{
A
Al Viro 已提交
1117
	__be32 *p;
L
Linus Torvalds 已提交
1118

1119
	p = reserve_space(xdr, 12+NFS4_STATEID_SIZE+16);
B
Benny Halevy 已提交
1120 1121 1122
	*p++ = cpu_to_be32(OP_LOCKU);
	*p++ = cpu_to_be32(nfs4_lock_type(args->fl, 0));
	*p++ = cpu_to_be32(args->seqid->sequence->counter);
B
Benny Halevy 已提交
1123
	p = xdr_encode_opaque_fixed(p, args->stateid->data, NFS4_STATEID_SIZE);
B
Benny Halevy 已提交
1124
	p = xdr_encode_hyper(p, args->fl->fl_start);
1125
	xdr_encode_hyper(p, nfs4_lock_length(args->fl));
1126
	hdr->nops++;
1127
	hdr->replen += decode_locku_maxsz;
L
Linus Torvalds 已提交
1128 1129
}

1130 1131 1132 1133 1134 1135 1136 1137 1138 1139 1140
static void encode_release_lockowner(struct xdr_stream *xdr, const struct nfs_lowner *lowner, struct compound_hdr *hdr)
{
	__be32 *p;

	p = reserve_space(xdr, 4);
	*p = cpu_to_be32(OP_RELEASE_LOCKOWNER);
	encode_lockowner(xdr, lowner);
	hdr->nops++;
	hdr->replen += decode_release_lockowner_maxsz;
}

1141
static void encode_lookup(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
L
Linus Torvalds 已提交
1142 1143
{
	int len = name->len;
A
Al Viro 已提交
1144
	__be32 *p;
L
Linus Torvalds 已提交
1145

1146
	p = reserve_space(xdr, 8 + len);
B
Benny Halevy 已提交
1147
	*p++ = cpu_to_be32(OP_LOOKUP);
1148
	xdr_encode_opaque(p, name->name, len);
1149
	hdr->nops++;
1150
	hdr->replen += decode_lookup_maxsz;
L
Linus Torvalds 已提交
1151 1152
}

1153
static void encode_share_access(struct xdr_stream *xdr, fmode_t fmode)
L
Linus Torvalds 已提交
1154
{
A
Al Viro 已提交
1155
	__be32 *p;
L
Linus Torvalds 已提交
1156

1157
	p = reserve_space(xdr, 8);
1158
	switch (fmode & (FMODE_READ|FMODE_WRITE)) {
A
Andy Adamson 已提交
1159
	case FMODE_READ:
B
Benny Halevy 已提交
1160
		*p++ = cpu_to_be32(NFS4_SHARE_ACCESS_READ);
A
Andy Adamson 已提交
1161 1162
		break;
	case FMODE_WRITE:
B
Benny Halevy 已提交
1163
		*p++ = cpu_to_be32(NFS4_SHARE_ACCESS_WRITE);
A
Andy Adamson 已提交
1164 1165
		break;
	case FMODE_READ|FMODE_WRITE:
B
Benny Halevy 已提交
1166
		*p++ = cpu_to_be32(NFS4_SHARE_ACCESS_BOTH);
A
Andy Adamson 已提交
1167 1168
		break;
	default:
B
Benny Halevy 已提交
1169
		*p++ = cpu_to_be32(0);
L
Linus Torvalds 已提交
1170
	}
1171
	*p = cpu_to_be32(0);		/* for linux, share_deny = 0 always */
L
Linus Torvalds 已提交
1172 1173 1174 1175
}

static inline void encode_openhdr(struct xdr_stream *xdr, const struct nfs_openargs *arg)
{
A
Al Viro 已提交
1176
	__be32 *p;
L
Linus Torvalds 已提交
1177 1178 1179 1180
 /*
 * opcode 4, seqid 4, share_access 4, share_deny 4, clientid 8, ownerlen 4,
 * owner 4 = 32
 */
1181
	p = reserve_space(xdr, 8);
B
Benny Halevy 已提交
1182
	*p++ = cpu_to_be32(OP_OPEN);
1183
	*p = cpu_to_be32(arg->seqid->sequence->counter);
1184
	encode_share_access(xdr, arg->fmode);
1185
	p = reserve_space(xdr, 28);
B
Benny Halevy 已提交
1186
	p = xdr_encode_hyper(p, arg->clientid);
B
Benny Halevy 已提交
1187
	*p++ = cpu_to_be32(16);
B
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1188
	p = xdr_encode_opaque_fixed(p, "open id:", 8);
1189
	xdr_encode_hyper(p, arg->id);
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}

static inline void encode_createmode(struct xdr_stream *xdr, const struct nfs_openargs *arg)
{
A
Al Viro 已提交
1194
	__be32 *p;
1195
	struct nfs_client *clp;
L
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1196

1197
	p = reserve_space(xdr, 4);
L
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1198
	switch(arg->open_flags & O_EXCL) {
A
Andy Adamson 已提交
1199
	case 0:
1200
		*p = cpu_to_be32(NFS4_CREATE_UNCHECKED);
A
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1201 1202 1203
		encode_attrs(xdr, arg->u.attrs, arg->server);
		break;
	default:
1204
		clp = arg->server->nfs_client;
1205
		if (clp->cl_mvops->minor_version > 0) {
1206 1207 1208 1209 1210 1211 1212 1213 1214 1215 1216 1217 1218 1219 1220
			if (nfs4_has_persistent_session(clp)) {
				*p = cpu_to_be32(NFS4_CREATE_GUARDED);
				encode_attrs(xdr, arg->u.attrs, arg->server);
			} else {
				struct iattr dummy;

				*p = cpu_to_be32(NFS4_CREATE_EXCLUSIVE4_1);
				encode_nfs4_verifier(xdr, &arg->u.verifier);
				dummy.ia_valid = 0;
				encode_attrs(xdr, &dummy, arg->server);
			}
		} else {
			*p = cpu_to_be32(NFS4_CREATE_EXCLUSIVE);
			encode_nfs4_verifier(xdr, &arg->u.verifier);
		}
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1221 1222 1223 1224 1225
	}
}

static void encode_opentype(struct xdr_stream *xdr, const struct nfs_openargs *arg)
{
A
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1226
	__be32 *p;
L
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1227

1228
	p = reserve_space(xdr, 4);
L
Linus Torvalds 已提交
1229
	switch (arg->open_flags & O_CREAT) {
A
Andy Adamson 已提交
1230
	case 0:
1231
		*p = cpu_to_be32(NFS4_OPEN_NOCREATE);
A
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1232 1233 1234
		break;
	default:
		BUG_ON(arg->claim != NFS4_OPEN_CLAIM_NULL);
1235
		*p = cpu_to_be32(NFS4_OPEN_CREATE);
A
Andy Adamson 已提交
1236
		encode_createmode(xdr, arg);
L
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1237 1238 1239
	}
}

1240
static inline void encode_delegation_type(struct xdr_stream *xdr, fmode_t delegation_type)
L
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1241
{
A
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1242
	__be32 *p;
L
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1243

1244
	p = reserve_space(xdr, 4);
L
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1245
	switch (delegation_type) {
A
Andy Adamson 已提交
1246
	case 0:
1247
		*p = cpu_to_be32(NFS4_OPEN_DELEGATE_NONE);
A
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1248 1249
		break;
	case FMODE_READ:
1250
		*p = cpu_to_be32(NFS4_OPEN_DELEGATE_READ);
A
Andy Adamson 已提交
1251 1252
		break;
	case FMODE_WRITE|FMODE_READ:
1253
		*p = cpu_to_be32(NFS4_OPEN_DELEGATE_WRITE);
A
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1254 1255 1256
		break;
	default:
		BUG();
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	}
}

static inline void encode_claim_null(struct xdr_stream *xdr, const struct qstr *name)
{
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	__be32 *p;
L
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1264
	p = reserve_space(xdr, 4);
1265
	*p = cpu_to_be32(NFS4_OPEN_CLAIM_NULL);
L
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	encode_string(xdr, name->len, name->name);
}

1269
static inline void encode_claim_previous(struct xdr_stream *xdr, fmode_t type)
L
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1270
{
A
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1271
	__be32 *p;
L
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1273
	p = reserve_space(xdr, 4);
1274
	*p = cpu_to_be32(NFS4_OPEN_CLAIM_PREVIOUS);
L
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	encode_delegation_type(xdr, type);
}

static inline void encode_claim_delegate_cur(struct xdr_stream *xdr, const struct qstr *name, const nfs4_stateid *stateid)
{
A
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1280
	__be32 *p;
L
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1281

1282
	p = reserve_space(xdr, 4+NFS4_STATEID_SIZE);
B
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1283
	*p++ = cpu_to_be32(NFS4_OPEN_CLAIM_DELEGATE_CUR);
1284
	xdr_encode_opaque_fixed(p, stateid->data, NFS4_STATEID_SIZE);
L
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	encode_string(xdr, name->len, name->name);
}

1288
static void encode_open(struct xdr_stream *xdr, const struct nfs_openargs *arg, struct compound_hdr *hdr)
L
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1289 1290 1291 1292
{
	encode_openhdr(xdr, arg);
	encode_opentype(xdr, arg);
	switch (arg->claim) {
A
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1293 1294 1295 1296 1297 1298 1299 1300 1301 1302 1303
	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();
L
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1304
	}
1305
	hdr->nops++;
1306
	hdr->replen += decode_open_maxsz;
L
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}

1309
static void encode_open_confirm(struct xdr_stream *xdr, const struct nfs_open_confirmargs *arg, struct compound_hdr *hdr)
L
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1310
{
A
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1311
	__be32 *p;
L
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1312

1313
	p = reserve_space(xdr, 4+NFS4_STATEID_SIZE+4);
B
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1314
	*p++ = cpu_to_be32(OP_OPEN_CONFIRM);
B
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1315
	p = xdr_encode_opaque_fixed(p, arg->stateid->data, NFS4_STATEID_SIZE);
1316
	*p = cpu_to_be32(arg->seqid->sequence->counter);
1317
	hdr->nops++;
1318
	hdr->replen += decode_open_confirm_maxsz;
L
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1319 1320
}

1321
static void encode_open_downgrade(struct xdr_stream *xdr, const struct nfs_closeargs *arg, struct compound_hdr *hdr)
L
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1322
{
A
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1323
	__be32 *p;
L
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1324

1325
	p = reserve_space(xdr, 4+NFS4_STATEID_SIZE+4);
B
Benny Halevy 已提交
1326
	*p++ = cpu_to_be32(OP_OPEN_DOWNGRADE);
B
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1327
	p = xdr_encode_opaque_fixed(p, arg->stateid->data, NFS4_STATEID_SIZE);
1328
	*p = cpu_to_be32(arg->seqid->sequence->counter);
1329
	encode_share_access(xdr, arg->fmode);
1330
	hdr->nops++;
1331
	hdr->replen += decode_open_downgrade_maxsz;
L
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}

1334
static void
1335
encode_putfh(struct xdr_stream *xdr, const struct nfs_fh *fh, struct compound_hdr *hdr)
L
Linus Torvalds 已提交
1336 1337
{
	int len = fh->size;
A
Al Viro 已提交
1338
	__be32 *p;
L
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1339

1340
	p = reserve_space(xdr, 8 + len);
B
Benny Halevy 已提交
1341
	*p++ = cpu_to_be32(OP_PUTFH);
1342
	xdr_encode_opaque(p, fh->data, len);
1343
	hdr->nops++;
1344
	hdr->replen += decode_putfh_maxsz;
L
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1345 1346
}

1347
static void encode_putrootfh(struct xdr_stream *xdr, struct compound_hdr *hdr)
L
Linus Torvalds 已提交
1348
{
A
Andy Adamson 已提交
1349
	__be32 *p;
1350

1351
	p = reserve_space(xdr, 4);
1352
	*p = cpu_to_be32(OP_PUTROOTFH);
1353
	hdr->nops++;
1354
	hdr->replen += decode_putrootfh_maxsz;
L
Linus Torvalds 已提交
1355 1356
}

1357
static void encode_stateid(struct xdr_stream *xdr, const struct nfs_open_context *ctx, const struct nfs_lock_context *l_ctx)
L
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1358 1359
{
	nfs4_stateid stateid;
A
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1360
	__be32 *p;
L
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1361

1362
	p = reserve_space(xdr, NFS4_STATEID_SIZE);
L
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1363
	if (ctx->state != NULL) {
1364
		nfs4_copy_stateid(&stateid, ctx->state, l_ctx->lockowner, l_ctx->pid);
1365
		xdr_encode_opaque_fixed(p, stateid.data, NFS4_STATEID_SIZE);
L
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1366
	} else
1367
		xdr_encode_opaque_fixed(p, zero_stateid.data, NFS4_STATEID_SIZE);
L
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1368 1369
}

1370
static void encode_read(struct xdr_stream *xdr, const struct nfs_readargs *args, struct compound_hdr *hdr)
L
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1371
{
A
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1372
	__be32 *p;
L
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1373

1374
	p = reserve_space(xdr, 4);
1375
	*p = cpu_to_be32(OP_READ);
L
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1376

1377
	encode_stateid(xdr, args->context, args->lock_context);
L
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1378

1379
	p = reserve_space(xdr, 12);
B
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1380
	p = xdr_encode_hyper(p, args->offset);
1381
	*p = cpu_to_be32(args->count);
1382
	hdr->nops++;
1383
	hdr->replen += decode_read_maxsz;
L
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1384 1385
}

1386
static void encode_readdir(struct xdr_stream *xdr, const struct nfs4_readdir_arg *readdir, struct rpc_rqst *req, struct compound_hdr *hdr)
L
Linus Torvalds 已提交
1387
{
B
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1388
	uint32_t attrs[2] = {0, 0};
1389
	uint32_t dircount = readdir->count >> 1;
A
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1390
	__be32 *p;
L
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1391

B
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1392 1393 1394 1395 1396 1397 1398
	if (readdir->plus) {
		attrs[0] |= FATTR4_WORD0_TYPE|FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE|
			FATTR4_WORD0_FSID|FATTR4_WORD0_FILEHANDLE;
		attrs[1] |= FATTR4_WORD1_MODE|FATTR4_WORD1_NUMLINKS|FATTR4_WORD1_OWNER|
			FATTR4_WORD1_OWNER_GROUP|FATTR4_WORD1_RAWDEV|
			FATTR4_WORD1_SPACE_USED|FATTR4_WORD1_TIME_ACCESS|
			FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
1399
		dircount >>= 1;
B
Bryan Schumaker 已提交
1400 1401 1402
	}
	attrs[0] |= FATTR4_WORD0_RDATTR_ERROR|FATTR4_WORD0_FILEID;
	attrs[1] |= FATTR4_WORD1_MOUNTED_ON_FILEID;
1403 1404 1405 1406 1407
	/* 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;
B
Bryan Schumaker 已提交
1408

1409
	p = reserve_space(xdr, 12+NFS4_VERIFIER_SIZE+20);
B
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1410
	*p++ = cpu_to_be32(OP_READDIR);
B
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1411
	p = xdr_encode_hyper(p, readdir->cookie);
B
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1412
	p = xdr_encode_opaque_fixed(p, readdir->verifier.data, NFS4_VERIFIER_SIZE);
1413
	*p++ = cpu_to_be32(dircount);
B
Benny Halevy 已提交
1414 1415
	*p++ = cpu_to_be32(readdir->count);
	*p++ = cpu_to_be32(2);
B
Bryan Schumaker 已提交
1416

B
Benny Halevy 已提交
1417
	*p++ = cpu_to_be32(attrs[0] & readdir->bitmask[0]);
1418
	*p = cpu_to_be32(attrs[1] & readdir->bitmask[1]);
1419
	hdr->nops++;
1420
	hdr->replen += decode_readdir_maxsz;
1421 1422
	dprintk("%s: cookie = %Lu, verifier = %08x:%08x, bitmap = %08x:%08x\n",
			__func__,
1423 1424 1425 1426 1427
			(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]);
L
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1428 1429
}

1430
static void encode_readlink(struct xdr_stream *xdr, const struct nfs4_readlink *readlink, struct rpc_rqst *req, struct compound_hdr *hdr)
L
Linus Torvalds 已提交
1431
{
A
Al Viro 已提交
1432
	__be32 *p;
L
Linus Torvalds 已提交
1433

1434
	p = reserve_space(xdr, 4);
1435
	*p = cpu_to_be32(OP_READLINK);
1436
	hdr->nops++;
1437
	hdr->replen += decode_readlink_maxsz;
L
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1438 1439
}

1440
static void encode_remove(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
L
Linus Torvalds 已提交
1441
{
A
Al Viro 已提交
1442
	__be32 *p;
L
Linus Torvalds 已提交
1443

1444
	p = reserve_space(xdr, 8 + name->len);
B
Benny Halevy 已提交
1445
	*p++ = cpu_to_be32(OP_REMOVE);
1446
	xdr_encode_opaque(p, name->name, name->len);
1447
	hdr->nops++;
1448
	hdr->replen += decode_remove_maxsz;
L
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1449 1450
}

1451
static void encode_rename(struct xdr_stream *xdr, const struct qstr *oldname, const struct qstr *newname, struct compound_hdr *hdr)
L
Linus Torvalds 已提交
1452
{
A
Al Viro 已提交
1453
	__be32 *p;
L
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1454

1455 1456 1457 1458
	p = reserve_space(xdr, 4);
	*p = cpu_to_be32(OP_RENAME);
	encode_string(xdr, oldname->len, oldname->name);
	encode_string(xdr, newname->len, newname->name);
1459
	hdr->nops++;
1460
	hdr->replen += decode_rename_maxsz;
L
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1461 1462
}

1463
static void encode_renew(struct xdr_stream *xdr, const struct nfs_client *client_stateid, struct compound_hdr *hdr)
L
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1464
{
A
Al Viro 已提交
1465
	__be32 *p;
L
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1466

1467
	p = reserve_space(xdr, 12);
B
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1468
	*p++ = cpu_to_be32(OP_RENEW);
1469
	xdr_encode_hyper(p, client_stateid->cl_clientid);
1470
	hdr->nops++;
1471
	hdr->replen += decode_renew_maxsz;
L
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1472 1473
}

1474
static void
1475
encode_restorefh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1476
{
A
Al Viro 已提交
1477
	__be32 *p;
1478

1479
	p = reserve_space(xdr, 4);
1480
	*p = cpu_to_be32(OP_RESTOREFH);
1481
	hdr->nops++;
1482
	hdr->replen += decode_restorefh_maxsz;
1483 1484
}

1485
static int
1486
encode_setacl(struct xdr_stream *xdr, struct nfs_setaclargs *arg, struct compound_hdr *hdr)
1487
{
A
Al Viro 已提交
1488
	__be32 *p;
1489

1490
	p = reserve_space(xdr, 4+NFS4_STATEID_SIZE);
B
Benny Halevy 已提交
1491
	*p++ = cpu_to_be32(OP_SETATTR);
1492
	xdr_encode_opaque_fixed(p, zero_stateid.data, NFS4_STATEID_SIZE);
1493
	p = reserve_space(xdr, 2*4);
B
Benny Halevy 已提交
1494
	*p++ = cpu_to_be32(1);
1495
	*p = cpu_to_be32(FATTR4_WORD0_ACL);
1496 1497
	if (arg->acl_len % 4)
		return -EINVAL;
1498
	p = reserve_space(xdr, 4);
1499
	*p = cpu_to_be32(arg->acl_len);
1500
	xdr_write_pages(xdr, arg->acl_pages, arg->acl_pgbase, arg->acl_len);
1501
	hdr->nops++;
1502
	hdr->replen += decode_setacl_maxsz;
1503 1504 1505
	return 0;
}

1506
static void
1507
encode_savefh(struct xdr_stream *xdr, struct compound_hdr *hdr)
L
Linus Torvalds 已提交
1508
{
A
Al Viro 已提交
1509
	__be32 *p;
L
Linus Torvalds 已提交
1510

1511
	p = reserve_space(xdr, 4);
1512
	*p = cpu_to_be32(OP_SAVEFH);
1513
	hdr->nops++;
1514
	hdr->replen += decode_savefh_maxsz;
L
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1515 1516
}

1517
static void encode_setattr(struct xdr_stream *xdr, const struct nfs_setattrargs *arg, const struct nfs_server *server, struct compound_hdr *hdr)
L
Linus Torvalds 已提交
1518
{
A
Al Viro 已提交
1519
	__be32 *p;
1520

1521
	p = reserve_space(xdr, 4+NFS4_STATEID_SIZE);
B
Benny Halevy 已提交
1522
	*p++ = cpu_to_be32(OP_SETATTR);
1523
	xdr_encode_opaque_fixed(p, arg->stateid.data, NFS4_STATEID_SIZE);
1524
	hdr->nops++;
1525
	hdr->replen += decode_setattr_maxsz;
1526
	encode_attrs(xdr, arg->iap, server);
L
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1527 1528
}

1529
static void encode_setclientid(struct xdr_stream *xdr, const struct nfs4_setclientid *setclientid, struct compound_hdr *hdr)
L
Linus Torvalds 已提交
1530
{
A
Al Viro 已提交
1531
	__be32 *p;
L
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1532

1533
	p = reserve_space(xdr, 4 + NFS4_VERIFIER_SIZE);
B
Benny Halevy 已提交
1534
	*p++ = cpu_to_be32(OP_SETCLIENTID);
1535
	xdr_encode_opaque_fixed(p, setclientid->sc_verifier->data, NFS4_VERIFIER_SIZE);
L
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1536 1537

	encode_string(xdr, setclientid->sc_name_len, setclientid->sc_name);
1538
	p = reserve_space(xdr, 4);
1539
	*p = cpu_to_be32(setclientid->sc_prog);
L
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1540 1541
	encode_string(xdr, setclientid->sc_netid_len, setclientid->sc_netid);
	encode_string(xdr, setclientid->sc_uaddr_len, setclientid->sc_uaddr);
1542
	p = reserve_space(xdr, 4);
1543
	*p = cpu_to_be32(setclientid->sc_cb_ident);
1544
	hdr->nops++;
1545
	hdr->replen += decode_setclientid_maxsz;
L
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1546 1547
}

1548
static void encode_setclientid_confirm(struct xdr_stream *xdr, const struct nfs4_setclientid_res *arg, struct compound_hdr *hdr)
L
Linus Torvalds 已提交
1549
{
A
Andy Adamson 已提交
1550
	__be32 *p;
L
Linus Torvalds 已提交
1551

1552
	p = reserve_space(xdr, 12 + NFS4_VERIFIER_SIZE);
B
Benny Halevy 已提交
1553
	*p++ = cpu_to_be32(OP_SETCLIENTID_CONFIRM);
1554 1555
	p = xdr_encode_hyper(p, arg->clientid);
	xdr_encode_opaque_fixed(p, arg->confirm.data, NFS4_VERIFIER_SIZE);
1556
	hdr->nops++;
1557
	hdr->replen += decode_setclientid_confirm_maxsz;
L
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1558 1559
}

1560
static void encode_write(struct xdr_stream *xdr, const struct nfs_writeargs *args, struct compound_hdr *hdr)
L
Linus Torvalds 已提交
1561
{
A
Al Viro 已提交
1562
	__be32 *p;
L
Linus Torvalds 已提交
1563

1564
	p = reserve_space(xdr, 4);
1565
	*p = cpu_to_be32(OP_WRITE);
L
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1566

1567
	encode_stateid(xdr, args->context, args->lock_context);
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1568

1569
	p = reserve_space(xdr, 16);
B
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1570
	p = xdr_encode_hyper(p, args->offset);
B
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1571
	*p++ = cpu_to_be32(args->stable);
1572
	*p = cpu_to_be32(args->count);
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1573 1574

	xdr_write_pages(xdr, args->pages, args->pgbase, args->count);
1575
	hdr->nops++;
1576
	hdr->replen += decode_write_maxsz;
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1577 1578
}

1579
static void encode_delegreturn(struct xdr_stream *xdr, const nfs4_stateid *stateid, struct compound_hdr *hdr)
L
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1580
{
A
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1581
	__be32 *p;
L
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1582

1583
	p = reserve_space(xdr, 4+NFS4_STATEID_SIZE);
L
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1584

B
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1585
	*p++ = cpu_to_be32(OP_DELEGRETURN);
1586
	xdr_encode_opaque_fixed(p, stateid->data, NFS4_STATEID_SIZE);
1587
	hdr->nops++;
1588
	hdr->replen += decode_delegreturn_maxsz;
L
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1589
}
1590

B
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1591
#if defined(CONFIG_NFS_V4_1)
1592
/* NFSv4.1 operations */
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1593 1594 1595 1596 1597 1598
static void encode_exchange_id(struct xdr_stream *xdr,
			       struct nfs41_exchange_id_args *args,
			       struct compound_hdr *hdr)
{
	__be32 *p;

1599
	p = reserve_space(xdr, 4 + sizeof(args->verifier->data));
B
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1600
	*p++ = cpu_to_be32(OP_EXCHANGE_ID);
1601
	xdr_encode_opaque_fixed(p, args->verifier->data, sizeof(args->verifier->data));
B
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1602 1603 1604

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

1605
	p = reserve_space(xdr, 12);
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1606 1607
	*p++ = cpu_to_be32(args->flags);
	*p++ = cpu_to_be32(0);	/* zero length state_protect4_a */
1608
	*p = cpu_to_be32(0);	/* zero length implementation id array */
B
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1609 1610 1611
	hdr->nops++;
	hdr->replen += decode_exchange_id_maxsz;
}
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static void encode_create_session(struct xdr_stream *xdr,
				  struct nfs41_create_session_args *args,
				  struct compound_hdr *hdr)
{
	__be32 *p;
	char machine_name[NFS4_MAX_MACHINE_NAME_LEN];
	uint32_t len;
	struct nfs_client *clp = args->client;
1621 1622 1623 1624 1625 1626 1627 1628
	u32 max_resp_sz_cached;

	/*
	 * Assumes OPEN is the biggest non-idempotent compound.
	 * 2 is the verifier.
	 */
	max_resp_sz_cached = (NFS4_dec_open_sz + RPC_REPHDRSIZE +
			      RPC_MAX_AUTH_SIZE + 2) * XDR_UNIT;
A
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1630 1631
	len = scnprintf(machine_name, sizeof(machine_name), "%s",
			clp->cl_ipaddr);
A
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1632

1633
	p = reserve_space(xdr, 20 + 2*28 + 20 + len + 12);
1634
	*p++ = cpu_to_be32(OP_CREATE_SESSION);
B
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1635
	p = xdr_encode_hyper(p, clp->cl_ex_clid);
B
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1636 1637
	*p++ = cpu_to_be32(clp->cl_seqid);			/*Sequence id */
	*p++ = cpu_to_be32(args->flags);			/*flags */
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1638 1639

	/* Fore Channel */
B
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1640 1641 1642
	*p++ = cpu_to_be32(args->fc_attrs.headerpadsz);	/* header padding size */
	*p++ = cpu_to_be32(args->fc_attrs.max_rqst_sz);	/* max req size */
	*p++ = cpu_to_be32(args->fc_attrs.max_resp_sz);	/* max resp size */
1643
	*p++ = cpu_to_be32(max_resp_sz_cached);		/* Max resp sz cached */
B
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1644 1645 1646
	*p++ = cpu_to_be32(args->fc_attrs.max_ops);	/* max operations */
	*p++ = cpu_to_be32(args->fc_attrs.max_reqs);	/* max requests */
	*p++ = cpu_to_be32(0);				/* rdmachannel_attrs */
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	/* Back Channel */
B
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1649 1650 1651 1652 1653 1654 1655
	*p++ = cpu_to_be32(args->fc_attrs.headerpadsz);	/* header padding size */
	*p++ = cpu_to_be32(args->bc_attrs.max_rqst_sz);	/* max req size */
	*p++ = cpu_to_be32(args->bc_attrs.max_resp_sz);	/* max resp size */
	*p++ = cpu_to_be32(args->bc_attrs.max_resp_sz_cached);	/* Max resp sz cached */
	*p++ = cpu_to_be32(args->bc_attrs.max_ops);	/* max operations */
	*p++ = cpu_to_be32(args->bc_attrs.max_reqs);	/* max requests */
	*p++ = cpu_to_be32(0);				/* rdmachannel_attrs */
A
Andy Adamson 已提交
1656

B
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1657 1658 1659
	*p++ = cpu_to_be32(args->cb_program);		/* cb_program */
	*p++ = cpu_to_be32(1);
	*p++ = cpu_to_be32(RPC_AUTH_UNIX);			/* auth_sys */
A
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1660 1661

	/* authsys_parms rfc1831 */
B
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1662
	*p++ = cpu_to_be32((u32)clp->cl_boot_time.tv_nsec);	/* stamp */
1663
	p = xdr_encode_opaque(p, machine_name, len);
B
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1664 1665
	*p++ = cpu_to_be32(0);				/* UID */
	*p++ = cpu_to_be32(0);				/* GID */
1666
	*p = cpu_to_be32(0);				/* No more gids */
A
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1667 1668 1669
	hdr->nops++;
	hdr->replen += decode_create_session_maxsz;
}
A
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1670 1671 1672 1673 1674 1675

static void encode_destroy_session(struct xdr_stream *xdr,
				   struct nfs4_session *session,
				   struct compound_hdr *hdr)
{
	__be32 *p;
1676
	p = reserve_space(xdr, 4 + NFS4_MAX_SESSIONID_LEN);
B
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1677
	*p++ = cpu_to_be32(OP_DESTROY_SESSION);
1678
	xdr_encode_opaque_fixed(p, session->sess_id.data, NFS4_MAX_SESSIONID_LEN);
A
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1679 1680 1681
	hdr->nops++;
	hdr->replen += decode_destroy_session_maxsz;
}
1682 1683 1684 1685 1686 1687 1688 1689 1690 1691 1692 1693 1694

static void encode_reclaim_complete(struct xdr_stream *xdr,
				    struct nfs41_reclaim_complete_args *args,
				    struct compound_hdr *hdr)
{
	__be32 *p;

	p = reserve_space(xdr, 8);
	*p++ = cpu_to_be32(OP_RECLAIM_COMPLETE);
	*p++ = cpu_to_be32(args->one_fs);
	hdr->nops++;
	hdr->replen += decode_reclaim_complete_maxsz;
}
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1695 1696
#endif /* CONFIG_NFS_V4_1 */

1697 1698 1699 1700 1701 1702
static void encode_sequence(struct xdr_stream *xdr,
			    const struct nfs4_sequence_args *args,
			    struct compound_hdr *hdr)
{
#if defined(CONFIG_NFS_V4_1)
	struct nfs4_session *session = args->sa_session;
A
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1703 1704 1705
	struct nfs4_slot_table *tp;
	struct nfs4_slot *slot;
	__be32 *p;
1706 1707 1708 1709

	if (!session)
		return;

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1710 1711 1712 1713 1714
	tp = &session->fc_slot_table;

	WARN_ON(args->sa_slotid == NFS4_MAX_SLOT_TABLE);
	slot = tp->slots + args->sa_slotid;

1715
	p = reserve_space(xdr, 4 + NFS4_MAX_SESSIONID_LEN + 16);
B
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1716
	*p++ = cpu_to_be32(OP_SEQUENCE);
A
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1717 1718 1719 1720 1721 1722 1723 1724 1725 1726 1727 1728 1729

	/*
	 * Sessionid + seqid + slotid + max slotid + cache_this
	 */
	dprintk("%s: sessionid=%u:%u:%u:%u seqid=%d slotid=%d "
		"max_slotid=%d cache_this=%d\n",
		__func__,
		((u32 *)session->sess_id.data)[0],
		((u32 *)session->sess_id.data)[1],
		((u32 *)session->sess_id.data)[2],
		((u32 *)session->sess_id.data)[3],
		slot->seq_nr, args->sa_slotid,
		tp->highest_used_slotid, args->sa_cache_this);
B
Benny Halevy 已提交
1730
	p = xdr_encode_opaque_fixed(p, session->sess_id.data, NFS4_MAX_SESSIONID_LEN);
B
Benny Halevy 已提交
1731 1732 1733
	*p++ = cpu_to_be32(slot->seq_nr);
	*p++ = cpu_to_be32(args->sa_slotid);
	*p++ = cpu_to_be32(tp->highest_used_slotid);
1734
	*p = cpu_to_be32(args->sa_cache_this);
1735 1736 1737 1738 1739
	hdr->nops++;
	hdr->replen += decode_sequence_maxsz;
#endif /* CONFIG_NFS_V4_1 */
}

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1740 1741 1742 1743
/*
 * END OF "GENERIC" ENCODE ROUTINES.
 */

1744 1745 1746 1747
static u32 nfs4_xdr_minorversion(const struct nfs4_sequence_args *args)
{
#if defined(CONFIG_NFS_V4_1)
	if (args->sa_session)
1748
		return args->sa_session->clp->cl_mvops->minor_version;
1749 1750 1751 1752
#endif /* CONFIG_NFS_V4_1 */
	return 0;
}

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1753 1754 1755
/*
 * Encode an ACCESS request
 */
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1756
static int nfs4_xdr_enc_access(struct rpc_rqst *req, __be32 *p, const struct nfs4_accessargs *args)
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1757 1758 1759
{
	struct xdr_stream xdr;
	struct compound_hdr hdr = {
1760
		.minorversion = nfs4_xdr_minorversion(&args->seq_args),
L
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1761 1762 1763
	};

	xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1764
	encode_compound_hdr(&xdr, req, &hdr);
1765
	encode_sequence(&xdr, &args->seq_args, &hdr);
1766 1767 1768
	encode_putfh(&xdr, args->fh, &hdr);
	encode_access(&xdr, args->access, &hdr);
	encode_getfattr(&xdr, args->bitmask, &hdr);
1769
	encode_nops(&hdr);
1770
	return 0;
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1771 1772 1773 1774 1775
}

/*
 * Encode LOOKUP request
 */
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1776
static int nfs4_xdr_enc_lookup(struct rpc_rqst *req, __be32 *p, const struct nfs4_lookup_arg *args)
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1777 1778 1779
{
	struct xdr_stream xdr;
	struct compound_hdr hdr = {
1780
		.minorversion = nfs4_xdr_minorversion(&args->seq_args),
L
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1781 1782 1783
	};

	xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1784
	encode_compound_hdr(&xdr, req, &hdr);
1785
	encode_sequence(&xdr, &args->seq_args, &hdr);
1786 1787 1788 1789
	encode_putfh(&xdr, args->dir_fh, &hdr);
	encode_lookup(&xdr, args->name, &hdr);
	encode_getfh(&xdr, &hdr);
	encode_getfattr(&xdr, args->bitmask, &hdr);
1790
	encode_nops(&hdr);
1791
	return 0;
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}

/*
 * Encode LOOKUP_ROOT request
 */
A
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1797
static int nfs4_xdr_enc_lookup_root(struct rpc_rqst *req, __be32 *p, const struct nfs4_lookup_root_arg *args)
L
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1798 1799 1800
{
	struct xdr_stream xdr;
	struct compound_hdr hdr = {
1801
		.minorversion = nfs4_xdr_minorversion(&args->seq_args),
L
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	};

	xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1805
	encode_compound_hdr(&xdr, req, &hdr);
1806
	encode_sequence(&xdr, &args->seq_args, &hdr);
1807 1808 1809
	encode_putrootfh(&xdr, &hdr);
	encode_getfh(&xdr, &hdr);
	encode_getfattr(&xdr, args->bitmask, &hdr);
1810
	encode_nops(&hdr);
1811
	return 0;
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}

/*
 * Encode REMOVE request
 */
1817
static int nfs4_xdr_enc_remove(struct rpc_rqst *req, __be32 *p, const struct nfs_removeargs *args)
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1818 1819 1820
{
	struct xdr_stream xdr;
	struct compound_hdr hdr = {
1821
		.minorversion = nfs4_xdr_minorversion(&args->seq_args),
L
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	};

	xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1825
	encode_compound_hdr(&xdr, req, &hdr);
1826
	encode_sequence(&xdr, &args->seq_args, &hdr);
1827 1828 1829
	encode_putfh(&xdr, args->fh, &hdr);
	encode_remove(&xdr, &args->name, &hdr);
	encode_getfattr(&xdr, args->bitmask, &hdr);
1830
	encode_nops(&hdr);
1831
	return 0;
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1832 1833 1834 1835 1836
}

/*
 * Encode RENAME request
 */
1837
static int nfs4_xdr_enc_rename(struct rpc_rqst *req, __be32 *p, const struct nfs_renameargs *args)
L
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1838 1839 1840
{
	struct xdr_stream xdr;
	struct compound_hdr hdr = {
1841
		.minorversion = nfs4_xdr_minorversion(&args->seq_args),
L
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1842 1843 1844
	};

	xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1845
	encode_compound_hdr(&xdr, req, &hdr);
1846
	encode_sequence(&xdr, &args->seq_args, &hdr);
1847 1848 1849 1850 1851 1852 1853
	encode_putfh(&xdr, args->old_dir, &hdr);
	encode_savefh(&xdr, &hdr);
	encode_putfh(&xdr, args->new_dir, &hdr);
	encode_rename(&xdr, args->old_name, args->new_name, &hdr);
	encode_getfattr(&xdr, args->bitmask, &hdr);
	encode_restorefh(&xdr, &hdr);
	encode_getfattr(&xdr, args->bitmask, &hdr);
1854
	encode_nops(&hdr);
1855
	return 0;
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1856 1857 1858 1859 1860
}

/*
 * Encode LINK request
 */
A
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1861
static int nfs4_xdr_enc_link(struct rpc_rqst *req, __be32 *p, const struct nfs4_link_arg *args)
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1862 1863 1864
{
	struct xdr_stream xdr;
	struct compound_hdr hdr = {
1865
		.minorversion = nfs4_xdr_minorversion(&args->seq_args),
L
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	};

	xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1869
	encode_compound_hdr(&xdr, req, &hdr);
1870
	encode_sequence(&xdr, &args->seq_args, &hdr);
1871 1872 1873 1874 1875 1876 1877
	encode_putfh(&xdr, args->fh, &hdr);
	encode_savefh(&xdr, &hdr);
	encode_putfh(&xdr, args->dir_fh, &hdr);
	encode_link(&xdr, args->name, &hdr);
	encode_getfattr(&xdr, args->bitmask, &hdr);
	encode_restorefh(&xdr, &hdr);
	encode_getfattr(&xdr, args->bitmask, &hdr);
1878
	encode_nops(&hdr);
1879
	return 0;
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1880 1881 1882 1883 1884
}

/*
 * Encode CREATE request
 */
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1885
static int nfs4_xdr_enc_create(struct rpc_rqst *req, __be32 *p, const struct nfs4_create_arg *args)
L
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1886 1887 1888
{
	struct xdr_stream xdr;
	struct compound_hdr hdr = {
1889
		.minorversion = nfs4_xdr_minorversion(&args->seq_args),
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	};

	xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1893
	encode_compound_hdr(&xdr, req, &hdr);
1894
	encode_sequence(&xdr, &args->seq_args, &hdr);
1895 1896 1897 1898 1899 1900 1901
	encode_putfh(&xdr, args->dir_fh, &hdr);
	encode_savefh(&xdr, &hdr);
	encode_create(&xdr, args, &hdr);
	encode_getfh(&xdr, &hdr);
	encode_getfattr(&xdr, args->bitmask, &hdr);
	encode_restorefh(&xdr, &hdr);
	encode_getfattr(&xdr, args->bitmask, &hdr);
1902
	encode_nops(&hdr);
1903
	return 0;
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}

/*
 * Encode SYMLINK request
 */
A
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1909
static int nfs4_xdr_enc_symlink(struct rpc_rqst *req, __be32 *p, const struct nfs4_create_arg *args)
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{
	return nfs4_xdr_enc_create(req, p, args);
}

/*
 * Encode GETATTR request
 */
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static int nfs4_xdr_enc_getattr(struct rpc_rqst *req, __be32 *p, const struct nfs4_getattr_arg *args)
L
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{
	struct xdr_stream xdr;
	struct compound_hdr hdr = {
1921
		.minorversion = nfs4_xdr_minorversion(&args->seq_args),
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	};

	xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1925
	encode_compound_hdr(&xdr, req, &hdr);
1926
	encode_sequence(&xdr, &args->seq_args, &hdr);
1927 1928
	encode_putfh(&xdr, args->fh, &hdr);
	encode_getfattr(&xdr, args->bitmask, &hdr);
1929
	encode_nops(&hdr);
1930
	return 0;
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}

/*
 * Encode a CLOSE request
 */
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1936
static int nfs4_xdr_enc_close(struct rpc_rqst *req, __be32 *p, struct nfs_closeargs *args)
L
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1937
{
A
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1938 1939
	struct xdr_stream xdr;
	struct compound_hdr hdr = {
1940
		.minorversion = nfs4_xdr_minorversion(&args->seq_args),
A
Andy Adamson 已提交
1941 1942 1943
	};

	xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1944
	encode_compound_hdr(&xdr, req, &hdr);
1945
	encode_sequence(&xdr, &args->seq_args, &hdr);
1946 1947 1948
	encode_putfh(&xdr, args->fh, &hdr);
	encode_close(&xdr, args, &hdr);
	encode_getfattr(&xdr, args->bitmask, &hdr);
1949
	encode_nops(&hdr);
1950
	return 0;
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}

/*
 * Encode an OPEN request
 */
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1956
static int nfs4_xdr_enc_open(struct rpc_rqst *req, __be32 *p, struct nfs_openargs *args)
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{
	struct xdr_stream xdr;
	struct compound_hdr hdr = {
1960
		.minorversion = nfs4_xdr_minorversion(&args->seq_args),
L
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	};

	xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1964
	encode_compound_hdr(&xdr, req, &hdr);
1965
	encode_sequence(&xdr, &args->seq_args, &hdr);
1966 1967 1968 1969 1970 1971 1972
	encode_putfh(&xdr, args->fh, &hdr);
	encode_savefh(&xdr, &hdr);
	encode_open(&xdr, args, &hdr);
	encode_getfh(&xdr, &hdr);
	encode_getfattr(&xdr, args->bitmask, &hdr);
	encode_restorefh(&xdr, &hdr);
	encode_getfattr(&xdr, args->bitmask, &hdr);
1973
	encode_nops(&hdr);
1974
	return 0;
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}

/*
 * Encode an OPEN_CONFIRM request
 */
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static int nfs4_xdr_enc_open_confirm(struct rpc_rqst *req, __be32 *p, struct nfs_open_confirmargs *args)
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{
	struct xdr_stream xdr;
	struct compound_hdr hdr = {
1984
		.nops   = 0,
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	};

	xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1988
	encode_compound_hdr(&xdr, req, &hdr);
1989 1990
	encode_putfh(&xdr, args->fh, &hdr);
	encode_open_confirm(&xdr, args, &hdr);
1991
	encode_nops(&hdr);
1992
	return 0;
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}

/*
 * Encode an OPEN request with no attributes.
 */
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static int nfs4_xdr_enc_open_noattr(struct rpc_rqst *req, __be32 *p, struct nfs_openargs *args)
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{
	struct xdr_stream xdr;
	struct compound_hdr hdr = {
2002
		.minorversion = nfs4_xdr_minorversion(&args->seq_args),
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2003 2004 2005
	};

	xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2006
	encode_compound_hdr(&xdr, req, &hdr);
2007
	encode_sequence(&xdr, &args->seq_args, &hdr);
2008 2009 2010
	encode_putfh(&xdr, args->fh, &hdr);
	encode_open(&xdr, args, &hdr);
	encode_getfattr(&xdr, args->bitmask, &hdr);
2011
	encode_nops(&hdr);
2012
	return 0;
L
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}

/*
 * Encode an OPEN_DOWNGRADE request
 */
A
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static int nfs4_xdr_enc_open_downgrade(struct rpc_rqst *req, __be32 *p, struct nfs_closeargs *args)
L
Linus Torvalds 已提交
2019 2020 2021
{
	struct xdr_stream xdr;
	struct compound_hdr hdr = {
2022
		.minorversion = nfs4_xdr_minorversion(&args->seq_args),
L
Linus Torvalds 已提交
2023 2024 2025
	};

	xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2026
	encode_compound_hdr(&xdr, req, &hdr);
2027
	encode_sequence(&xdr, &args->seq_args, &hdr);
2028 2029 2030
	encode_putfh(&xdr, args->fh, &hdr);
	encode_open_downgrade(&xdr, args, &hdr);
	encode_getfattr(&xdr, args->bitmask, &hdr);
2031
	encode_nops(&hdr);
2032
	return 0;
L
Linus Torvalds 已提交
2033 2034 2035 2036 2037
}

/*
 * Encode a LOCK request
 */
A
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2038
static int nfs4_xdr_enc_lock(struct rpc_rqst *req, __be32 *p, struct nfs_lock_args *args)
L
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2039 2040 2041
{
	struct xdr_stream xdr;
	struct compound_hdr hdr = {
2042
		.minorversion = nfs4_xdr_minorversion(&args->seq_args),
L
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2043 2044 2045
	};

	xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2046
	encode_compound_hdr(&xdr, req, &hdr);
2047
	encode_sequence(&xdr, &args->seq_args, &hdr);
2048 2049
	encode_putfh(&xdr, args->fh, &hdr);
	encode_lock(&xdr, args, &hdr);
2050
	encode_nops(&hdr);
2051
	return 0;
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}

/*
 * Encode a LOCKT request
 */
A
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2057
static int nfs4_xdr_enc_lockt(struct rpc_rqst *req, __be32 *p, struct nfs_lockt_args *args)
L
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2058 2059 2060
{
	struct xdr_stream xdr;
	struct compound_hdr hdr = {
2061
		.minorversion = nfs4_xdr_minorversion(&args->seq_args),
L
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	};

	xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2065
	encode_compound_hdr(&xdr, req, &hdr);
2066
	encode_sequence(&xdr, &args->seq_args, &hdr);
2067 2068
	encode_putfh(&xdr, args->fh, &hdr);
	encode_lockt(&xdr, args, &hdr);
2069
	encode_nops(&hdr);
2070
	return 0;
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}

/*
 * Encode a LOCKU request
 */
A
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static int nfs4_xdr_enc_locku(struct rpc_rqst *req, __be32 *p, struct nfs_locku_args *args)
L
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2077 2078 2079
{
	struct xdr_stream xdr;
	struct compound_hdr hdr = {
2080
		.minorversion = nfs4_xdr_minorversion(&args->seq_args),
L
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2081 2082 2083
	};

	xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2084
	encode_compound_hdr(&xdr, req, &hdr);
2085
	encode_sequence(&xdr, &args->seq_args, &hdr);
2086 2087
	encode_putfh(&xdr, args->fh, &hdr);
	encode_locku(&xdr, args, &hdr);
2088
	encode_nops(&hdr);
2089
	return 0;
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}

2092 2093 2094 2095 2096 2097 2098 2099 2100 2101 2102 2103 2104 2105
static int nfs4_xdr_enc_release_lockowner(struct rpc_rqst *req, __be32 *p, struct nfs_release_lockowner_args *args)
{
	struct xdr_stream xdr;
	struct compound_hdr hdr = {
		.minorversion = 0,
	};

	xdr_init_encode(&xdr, &req->rq_snd_buf, p);
	encode_compound_hdr(&xdr, req, &hdr);
	encode_release_lockowner(&xdr, &args->lock_owner, &hdr);
	encode_nops(&hdr);
	return 0;
}

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/*
 * Encode a READLINK request
 */
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static int nfs4_xdr_enc_readlink(struct rpc_rqst *req, __be32 *p, const struct nfs4_readlink *args)
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{
	struct xdr_stream xdr;
	struct compound_hdr hdr = {
2113
		.minorversion = nfs4_xdr_minorversion(&args->seq_args),
L
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	};

	xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2117
	encode_compound_hdr(&xdr, req, &hdr);
2118
	encode_sequence(&xdr, &args->seq_args, &hdr);
2119 2120
	encode_putfh(&xdr, args->fh, &hdr);
	encode_readlink(&xdr, args, req, &hdr);
2121

2122
	xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2, args->pages,
2123
			args->pgbase, args->pglen);
2124
	encode_nops(&hdr);
2125
	return 0;
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2126 2127 2128 2129 2130
}

/*
 * Encode a READDIR request
 */
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static int nfs4_xdr_enc_readdir(struct rpc_rqst *req, __be32 *p, const struct nfs4_readdir_arg *args)
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{
	struct xdr_stream xdr;
	struct compound_hdr hdr = {
2135
		.minorversion = nfs4_xdr_minorversion(&args->seq_args),
L
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2136 2137 2138
	};

	xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2139
	encode_compound_hdr(&xdr, req, &hdr);
2140
	encode_sequence(&xdr, &args->seq_args, &hdr);
2141 2142
	encode_putfh(&xdr, args->fh, &hdr);
	encode_readdir(&xdr, args, req, &hdr);
2143

2144
	xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2, args->pages,
2145 2146
			 args->pgbase, args->count);
	dprintk("%s: inlined page args = (%u, %p, %u, %u)\n",
2147
			__func__, hdr.replen << 2, args->pages,
2148
			args->pgbase, args->count);
2149
	encode_nops(&hdr);
2150
	return 0;
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}

/*
 * Encode a READ request
 */
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static int nfs4_xdr_enc_read(struct rpc_rqst *req, __be32 *p, struct nfs_readargs *args)
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{
	struct xdr_stream xdr;
	struct compound_hdr hdr = {
2160
		.minorversion = nfs4_xdr_minorversion(&args->seq_args),
L
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2161 2162 2163
	};

	xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2164
	encode_compound_hdr(&xdr, req, &hdr);
2165
	encode_sequence(&xdr, &args->seq_args, &hdr);
2166 2167
	encode_putfh(&xdr, args->fh, &hdr);
	encode_read(&xdr, args, &hdr);
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2169
	xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2,
L
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2170
			 args->pages, args->pgbase, args->count);
2171
	req->rq_rcv_buf.flags |= XDRBUF_READ;
2172
	encode_nops(&hdr);
2173
	return 0;
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}

/*
 * Encode an SETATTR request
 */
A
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static int nfs4_xdr_enc_setattr(struct rpc_rqst *req, __be32 *p, struct nfs_setattrargs *args)
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{
A
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	struct xdr_stream xdr;
	struct compound_hdr hdr = {
2183
		.minorversion = nfs4_xdr_minorversion(&args->seq_args),
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2184 2185 2186
	};

	xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2187
	encode_compound_hdr(&xdr, req, &hdr);
2188
	encode_sequence(&xdr, &args->seq_args, &hdr);
2189 2190 2191
	encode_putfh(&xdr, args->fh, &hdr);
	encode_setattr(&xdr, args, args->server, &hdr);
	encode_getfattr(&xdr, args->bitmask, &hdr);
2192
	encode_nops(&hdr);
2193
	return 0;
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}

2196 2197 2198 2199
/*
 * Encode a GETACL request
 */
static int
A
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nfs4_xdr_enc_getacl(struct rpc_rqst *req, __be32 *p,
2201 2202 2203 2204
		struct nfs_getaclargs *args)
{
	struct xdr_stream xdr;
	struct compound_hdr hdr = {
2205
		.minorversion = nfs4_xdr_minorversion(&args->seq_args),
2206
	};
2207
	uint32_t replen;
2208 2209

	xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2210
	encode_compound_hdr(&xdr, req, &hdr);
2211
	encode_sequence(&xdr, &args->seq_args, &hdr);
2212
	encode_putfh(&xdr, args->fh, &hdr);
2213
	replen = hdr.replen + op_decode_hdr_maxsz + nfs4_fattr_bitmap_maxsz + 1;
2214 2215
	encode_getattr_two(&xdr, FATTR4_WORD0_ACL, 0, &hdr);

2216
	xdr_inline_pages(&req->rq_rcv_buf, replen << 2,
2217
		args->acl_pages, args->acl_pgbase, args->acl_len);
2218
	encode_nops(&hdr);
2219
	return 0;
2220 2221
}

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/*
 * Encode a WRITE request
 */
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static int nfs4_xdr_enc_write(struct rpc_rqst *req, __be32 *p, struct nfs_writeargs *args)
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{
	struct xdr_stream xdr;
	struct compound_hdr hdr = {
2229
		.minorversion = nfs4_xdr_minorversion(&args->seq_args),
L
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	};

	xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2233
	encode_compound_hdr(&xdr, req, &hdr);
2234
	encode_sequence(&xdr, &args->seq_args, &hdr);
2235 2236
	encode_putfh(&xdr, args->fh, &hdr);
	encode_write(&xdr, args, &hdr);
2237
	req->rq_snd_buf.flags |= XDRBUF_WRITE;
2238
	encode_getfattr(&xdr, args->bitmask, &hdr);
2239
	encode_nops(&hdr);
2240
	return 0;
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}

/*
 *  a COMMIT request
 */
A
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static int nfs4_xdr_enc_commit(struct rpc_rqst *req, __be32 *p, struct nfs_writeargs *args)
L
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{
	struct xdr_stream xdr;
	struct compound_hdr hdr = {
2250
		.minorversion = nfs4_xdr_minorversion(&args->seq_args),
L
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	};

	xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2254
	encode_compound_hdr(&xdr, req, &hdr);
2255
	encode_sequence(&xdr, &args->seq_args, &hdr);
2256 2257 2258
	encode_putfh(&xdr, args->fh, &hdr);
	encode_commit(&xdr, args, &hdr);
	encode_getfattr(&xdr, args->bitmask, &hdr);
2259
	encode_nops(&hdr);
2260
	return 0;
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}

/*
 * FSINFO request
 */
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Al Viro 已提交
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static int nfs4_xdr_enc_fsinfo(struct rpc_rqst *req, __be32 *p, struct nfs4_fsinfo_arg *args)
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2267 2268 2269
{
	struct xdr_stream xdr;
	struct compound_hdr hdr = {
2270
		.minorversion = nfs4_xdr_minorversion(&args->seq_args),
L
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	};

	xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2274
	encode_compound_hdr(&xdr, req, &hdr);
2275
	encode_sequence(&xdr, &args->seq_args, &hdr);
2276 2277
	encode_putfh(&xdr, args->fh, &hdr);
	encode_fsinfo(&xdr, args->bitmask, &hdr);
2278
	encode_nops(&hdr);
2279
	return 0;
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}

/*
 * a PATHCONF request
 */
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static int nfs4_xdr_enc_pathconf(struct rpc_rqst *req, __be32 *p, const struct nfs4_pathconf_arg *args)
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2286 2287 2288
{
	struct xdr_stream xdr;
	struct compound_hdr hdr = {
2289
		.minorversion = nfs4_xdr_minorversion(&args->seq_args),
L
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	};

	xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2293
	encode_compound_hdr(&xdr, req, &hdr);
2294
	encode_sequence(&xdr, &args->seq_args, &hdr);
2295 2296 2297
	encode_putfh(&xdr, args->fh, &hdr);
	encode_getattr_one(&xdr, args->bitmask[0] & nfs4_pathconf_bitmap[0],
			   &hdr);
2298
	encode_nops(&hdr);
2299
	return 0;
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}

/*
 * a STATFS request
 */
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static int nfs4_xdr_enc_statfs(struct rpc_rqst *req, __be32 *p, const struct nfs4_statfs_arg *args)
L
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{
	struct xdr_stream xdr;
	struct compound_hdr hdr = {
2309
		.minorversion = nfs4_xdr_minorversion(&args->seq_args),
L
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2310 2311 2312
	};

	xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2313
	encode_compound_hdr(&xdr, req, &hdr);
2314
	encode_sequence(&xdr, &args->seq_args, &hdr);
2315 2316 2317
	encode_putfh(&xdr, args->fh, &hdr);
	encode_getattr_two(&xdr, args->bitmask[0] & nfs4_statfs_bitmap[0],
			   args->bitmask[1] & nfs4_statfs_bitmap[1], &hdr);
2318
	encode_nops(&hdr);
2319
	return 0;
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}

/*
 * GETATTR_BITMAP request
 */
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static int nfs4_xdr_enc_server_caps(struct rpc_rqst *req, __be32 *p,
				    struct nfs4_server_caps_arg *args)
L
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{
	struct xdr_stream xdr;
	struct compound_hdr hdr = {
2330
		.minorversion = nfs4_xdr_minorversion(&args->seq_args),
L
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2331 2332 2333
	};

	xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2334
	encode_compound_hdr(&xdr, req, &hdr);
2335
	encode_sequence(&xdr, &args->seq_args, &hdr);
B
Benny Halevy 已提交
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	encode_putfh(&xdr, args->fhandle, &hdr);
2337 2338 2339 2340
	encode_getattr_one(&xdr, FATTR4_WORD0_SUPPORTED_ATTRS|
			   FATTR4_WORD0_LINK_SUPPORT|
			   FATTR4_WORD0_SYMLINK_SUPPORT|
			   FATTR4_WORD0_ACLSUPPORT, &hdr);
2341
	encode_nops(&hdr);
2342
	return 0;
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}

/*
 * a RENEW request
 */
A
Al Viro 已提交
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static int nfs4_xdr_enc_renew(struct rpc_rqst *req, __be32 *p, struct nfs_client *clp)
L
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2349 2350 2351
{
	struct xdr_stream xdr;
	struct compound_hdr hdr = {
2352
		.nops	= 0,
L
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2353 2354 2355
	};

	xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2356
	encode_compound_hdr(&xdr, req, &hdr);
2357
	encode_renew(&xdr, clp, &hdr);
2358
	encode_nops(&hdr);
2359
	return 0;
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}

/*
 * a SETCLIENTID request
 */
A
Al Viro 已提交
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static int nfs4_xdr_enc_setclientid(struct rpc_rqst *req, __be32 *p, struct nfs4_setclientid *sc)
L
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2366 2367 2368
{
	struct xdr_stream xdr;
	struct compound_hdr hdr = {
2369
		.nops	= 0,
L
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2370 2371 2372
	};

	xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2373
	encode_compound_hdr(&xdr, req, &hdr);
2374
	encode_setclientid(&xdr, sc, &hdr);
2375
	encode_nops(&hdr);
2376
	return 0;
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}

/*
 * a SETCLIENTID_CONFIRM request
 */
2382
static int nfs4_xdr_enc_setclientid_confirm(struct rpc_rqst *req, __be32 *p, struct nfs4_setclientid_res *arg)
L
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2383 2384 2385
{
	struct xdr_stream xdr;
	struct compound_hdr hdr = {
2386
		.nops	= 0,
L
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2387 2388 2389 2390
	};
	const u32 lease_bitmap[2] = { FATTR4_WORD0_LEASE_TIME, 0 };

	xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2391
	encode_compound_hdr(&xdr, req, &hdr);
2392
	encode_setclientid_confirm(&xdr, arg, &hdr);
2393 2394
	encode_putrootfh(&xdr, &hdr);
	encode_fsinfo(&xdr, lease_bitmap, &hdr);
2395
	encode_nops(&hdr);
2396
	return 0;
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}

/*
 * DELEGRETURN request
 */
A
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static int nfs4_xdr_enc_delegreturn(struct rpc_rqst *req, __be32 *p, const struct nfs4_delegreturnargs *args)
L
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2403 2404 2405
{
	struct xdr_stream xdr;
	struct compound_hdr hdr = {
2406
		.minorversion = nfs4_xdr_minorversion(&args->seq_args),
L
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	};

	xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2410
	encode_compound_hdr(&xdr, req, &hdr);
2411
	encode_sequence(&xdr, &args->seq_args, &hdr);
2412 2413 2414
	encode_putfh(&xdr, args->fhandle, &hdr);
	encode_delegreturn(&xdr, args->stateid, &hdr);
	encode_getfattr(&xdr, args->bitmask, &hdr);
2415
	encode_nops(&hdr);
2416
	return 0;
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}

2419 2420 2421
/*
 * Encode FS_LOCATIONS request
 */
A
Al Viro 已提交
2422
static int nfs4_xdr_enc_fs_locations(struct rpc_rqst *req, __be32 *p, struct nfs4_fs_locations_arg *args)
2423 2424 2425
{
	struct xdr_stream xdr;
	struct compound_hdr hdr = {
2426
		.minorversion = nfs4_xdr_minorversion(&args->seq_args),
2427
	};
2428
	uint32_t replen;
2429 2430

	xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2431
	encode_compound_hdr(&xdr, req, &hdr);
2432
	encode_sequence(&xdr, &args->seq_args, &hdr);
2433 2434
	encode_putfh(&xdr, args->dir_fh, &hdr);
	encode_lookup(&xdr, args->name, &hdr);
2435
	replen = hdr.replen;	/* get the attribute into args->page */
2436 2437
	encode_fs_locations(&xdr, args->bitmask, &hdr);

2438
	xdr_inline_pages(&req->rq_rcv_buf, replen << 2, &args->page,
2439
			0, PAGE_SIZE);
2440
	encode_nops(&hdr);
2441
	return 0;
2442 2443
}

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#if defined(CONFIG_NFS_V4_1)
/*
 * EXCHANGE_ID request
 */
static int nfs4_xdr_enc_exchange_id(struct rpc_rqst *req, uint32_t *p,
				    struct nfs41_exchange_id_args *args)
{
	struct xdr_stream xdr;
	struct compound_hdr hdr = {
2453
		.minorversion = args->client->cl_mvops->minor_version,
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	};

	xdr_init_encode(&xdr, &req->rq_snd_buf, p);
	encode_compound_hdr(&xdr, req, &hdr);
	encode_exchange_id(&xdr, args, &hdr);
	encode_nops(&hdr);
	return 0;
}
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/*
 * a CREATE_SESSION request
 */
static int nfs4_xdr_enc_create_session(struct rpc_rqst *req, uint32_t *p,
				       struct nfs41_create_session_args *args)
{
	struct xdr_stream xdr;
	struct compound_hdr hdr = {
2471
		.minorversion = args->client->cl_mvops->minor_version,
A
Andy Adamson 已提交
2472 2473 2474 2475 2476 2477 2478 2479 2480
	};

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

A
Andy Adamson 已提交
2481 2482 2483 2484 2485 2486 2487 2488
/*
 * a DESTROY_SESSION request
 */
static int nfs4_xdr_enc_destroy_session(struct rpc_rqst *req, uint32_t *p,
					struct nfs4_session *session)
{
	struct xdr_stream xdr;
	struct compound_hdr hdr = {
2489
		.minorversion = session->clp->cl_mvops->minor_version,
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Andy Adamson 已提交
2490 2491 2492 2493 2494 2495 2496 2497 2498
	};

	xdr_init_encode(&xdr, &req->rq_snd_buf, p);
	encode_compound_hdr(&xdr, req, &hdr);
	encode_destroy_session(&xdr, session, &hdr);
	encode_nops(&hdr);
	return 0;
}

A
Andy Adamson 已提交
2499 2500 2501 2502 2503 2504 2505 2506 2507 2508 2509 2510 2511 2512 2513 2514 2515 2516
/*
 * a SEQUENCE request
 */
static int nfs4_xdr_enc_sequence(struct rpc_rqst *req, uint32_t *p,
				 struct nfs4_sequence_args *args)
{
	struct xdr_stream xdr;
	struct compound_hdr hdr = {
		.minorversion = nfs4_xdr_minorversion(args),
	};

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

A
Andy Adamson 已提交
2517 2518 2519 2520 2521 2522 2523 2524 2525 2526 2527 2528 2529 2530 2531 2532 2533 2534 2535 2536
/*
 * a GET_LEASE_TIME request
 */
static int nfs4_xdr_enc_get_lease_time(struct rpc_rqst *req, uint32_t *p,
				       struct nfs4_get_lease_time_args *args)
{
	struct xdr_stream xdr;
	struct compound_hdr hdr = {
		.minorversion = nfs4_xdr_minorversion(&args->la_seq_args),
	};
	const u32 lease_bitmap[2] = { FATTR4_WORD0_LEASE_TIME, 0 };

	xdr_init_encode(&xdr, &req->rq_snd_buf, p);
	encode_compound_hdr(&xdr, req, &hdr);
	encode_sequence(&xdr, &args->la_seq_args, &hdr);
	encode_putrootfh(&xdr, &hdr);
	encode_fsinfo(&xdr, lease_bitmap, &hdr);
	encode_nops(&hdr);
	return 0;
}
2537 2538 2539 2540 2541 2542 2543 2544 2545 2546 2547 2548 2549 2550 2551 2552 2553 2554 2555 2556

/*
 * a RECLAIM_COMPLETE request
 */
static int nfs4_xdr_enc_reclaim_complete(struct rpc_rqst *req, uint32_t *p,
				     struct nfs41_reclaim_complete_args *args)
{
	struct xdr_stream xdr;
	struct compound_hdr hdr = {
		.minorversion = nfs4_xdr_minorversion(&args->seq_args)
	};

	xdr_init_encode(&xdr, &req->rq_snd_buf, p);
	encode_compound_hdr(&xdr, req, &hdr);
	encode_sequence(&xdr, &args->seq_args, &hdr);
	encode_reclaim_complete(&xdr, args, &hdr);
	encode_nops(&hdr);
	return 0;
}

B
Benny Halevy 已提交
2557 2558
#endif /* CONFIG_NFS_V4_1 */

2559 2560 2561 2562 2563 2564
static void print_overflow_msg(const char *func, const struct xdr_stream *xdr)
{
	dprintk("nfs: %s: prematurely hit end of receive buffer. "
		"Remaining buffer length is %tu words.\n",
		func, xdr->end - xdr->p);
}
L
Linus Torvalds 已提交
2565

2566
static int decode_opaque_inline(struct xdr_stream *xdr, unsigned int *len, char **string)
L
Linus Torvalds 已提交
2567
{
A
Al Viro 已提交
2568
	__be32 *p;
L
Linus Torvalds 已提交
2569

B
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2570 2571 2572
	p = xdr_inline_decode(xdr, 4);
	if (unlikely(!p))
		goto out_overflow;
2573
	*len = be32_to_cpup(p);
B
Benny Halevy 已提交
2574 2575 2576
	p = xdr_inline_decode(xdr, *len);
	if (unlikely(!p))
		goto out_overflow;
L
Linus Torvalds 已提交
2577 2578
	*string = (char *)p;
	return 0;
B
Benny Halevy 已提交
2579 2580 2581
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
L
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2582 2583 2584 2585
}

static int decode_compound_hdr(struct xdr_stream *xdr, struct compound_hdr *hdr)
{
A
Al Viro 已提交
2586
	__be32 *p;
L
Linus Torvalds 已提交
2587

B
Benny Halevy 已提交
2588 2589 2590
	p = xdr_inline_decode(xdr, 8);
	if (unlikely(!p))
		goto out_overflow;
B
Benny Halevy 已提交
2591
	hdr->status = be32_to_cpup(p++);
2592
	hdr->taglen = be32_to_cpup(p);
2593

B
Benny Halevy 已提交
2594 2595 2596
	p = xdr_inline_decode(xdr, hdr->taglen + 4);
	if (unlikely(!p))
		goto out_overflow;
L
Linus Torvalds 已提交
2597 2598
	hdr->tag = (char *)p;
	p += XDR_QUADLEN(hdr->taglen);
2599
	hdr->nops = be32_to_cpup(p);
2600 2601
	if (unlikely(hdr->nops < 1))
		return nfs4_stat_to_errno(hdr->status);
L
Linus Torvalds 已提交
2602
	return 0;
B
Benny Halevy 已提交
2603 2604 2605
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
L
Linus Torvalds 已提交
2606 2607 2608 2609
}

static int decode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 expected)
{
A
Al Viro 已提交
2610
	__be32 *p;
L
Linus Torvalds 已提交
2611 2612 2613
	uint32_t opnum;
	int32_t nfserr;

B
Benny Halevy 已提交
2614 2615 2616
	p = xdr_inline_decode(xdr, 8);
	if (unlikely(!p))
		goto out_overflow;
B
Benny Halevy 已提交
2617
	opnum = be32_to_cpup(p++);
L
Linus Torvalds 已提交
2618
	if (opnum != expected) {
2619 2620
		dprintk("nfs: Server returned operation"
			" %d but we issued a request for %d\n",
L
Linus Torvalds 已提交
2621 2622 2623
				opnum, expected);
		return -EIO;
	}
2624
	nfserr = be32_to_cpup(p);
L
Linus Torvalds 已提交
2625
	if (nfserr != NFS_OK)
2626
		return nfs4_stat_to_errno(nfserr);
L
Linus Torvalds 已提交
2627
	return 0;
B
Benny Halevy 已提交
2628 2629 2630
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
L
Linus Torvalds 已提交
2631 2632 2633
}

/* Dummy routine */
2634
static int decode_ace(struct xdr_stream *xdr, void *ace, struct nfs_client *clp)
L
Linus Torvalds 已提交
2635
{
A
Al Viro 已提交
2636
	__be32 *p;
2637
	unsigned int strlen;
L
Linus Torvalds 已提交
2638 2639
	char *str;

B
Benny Halevy 已提交
2640 2641 2642 2643 2644
	p = xdr_inline_decode(xdr, 12);
	if (likely(p))
		return decode_opaque_inline(xdr, &strlen, &str);
	print_overflow_msg(__func__, xdr);
	return -EIO;
L
Linus Torvalds 已提交
2645 2646 2647 2648
}

static int decode_attr_bitmap(struct xdr_stream *xdr, uint32_t *bitmap)
{
A
Al Viro 已提交
2649 2650
	uint32_t bmlen;
	__be32 *p;
L
Linus Torvalds 已提交
2651

B
Benny Halevy 已提交
2652 2653 2654
	p = xdr_inline_decode(xdr, 4);
	if (unlikely(!p))
		goto out_overflow;
2655
	bmlen = be32_to_cpup(p);
L
Linus Torvalds 已提交
2656 2657

	bitmap[0] = bitmap[1] = 0;
B
Benny Halevy 已提交
2658 2659 2660
	p = xdr_inline_decode(xdr, (bmlen << 2));
	if (unlikely(!p))
		goto out_overflow;
L
Linus Torvalds 已提交
2661
	if (bmlen > 0) {
B
Benny Halevy 已提交
2662
		bitmap[0] = be32_to_cpup(p++);
L
Linus Torvalds 已提交
2663
		if (bmlen > 1)
2664
			bitmap[1] = be32_to_cpup(p);
L
Linus Torvalds 已提交
2665 2666
	}
	return 0;
B
Benny Halevy 已提交
2667 2668 2669
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
L
Linus Torvalds 已提交
2670 2671
}

A
Al Viro 已提交
2672
static inline int decode_attr_length(struct xdr_stream *xdr, uint32_t *attrlen, __be32 **savep)
L
Linus Torvalds 已提交
2673
{
A
Al Viro 已提交
2674
	__be32 *p;
L
Linus Torvalds 已提交
2675

B
Benny Halevy 已提交
2676 2677 2678
	p = xdr_inline_decode(xdr, 4);
	if (unlikely(!p))
		goto out_overflow;
2679
	*attrlen = be32_to_cpup(p);
L
Linus Torvalds 已提交
2680 2681
	*savep = xdr->p;
	return 0;
B
Benny Halevy 已提交
2682 2683 2684
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
L
Linus Torvalds 已提交
2685 2686 2687 2688 2689
}

static int decode_attr_supported(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *bitmask)
{
	if (likely(bitmap[0] & FATTR4_WORD0_SUPPORTED_ATTRS)) {
R
Roman Borisov 已提交
2690 2691 2692 2693
		int ret;
		ret = decode_attr_bitmap(xdr, bitmask);
		if (unlikely(ret < 0))
			return ret;
L
Linus Torvalds 已提交
2694 2695 2696
		bitmap[0] &= ~FATTR4_WORD0_SUPPORTED_ATTRS;
	} else
		bitmask[0] = bitmask[1] = 0;
2697
	dprintk("%s: bitmask=%08x:%08x\n", __func__, bitmask[0], bitmask[1]);
L
Linus Torvalds 已提交
2698 2699 2700 2701 2702
	return 0;
}

static int decode_attr_type(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *type)
{
A
Al Viro 已提交
2703
	__be32 *p;
2704
	int ret = 0;
L
Linus Torvalds 已提交
2705 2706 2707 2708 2709

	*type = 0;
	if (unlikely(bitmap[0] & (FATTR4_WORD0_TYPE - 1U)))
		return -EIO;
	if (likely(bitmap[0] & FATTR4_WORD0_TYPE)) {
B
Benny Halevy 已提交
2710 2711 2712
		p = xdr_inline_decode(xdr, 4);
		if (unlikely(!p))
			goto out_overflow;
2713
		*type = be32_to_cpup(p);
L
Linus Torvalds 已提交
2714
		if (*type < NF4REG || *type > NF4NAMEDATTR) {
2715
			dprintk("%s: bad type %d\n", __func__, *type);
L
Linus Torvalds 已提交
2716 2717 2718
			return -EIO;
		}
		bitmap[0] &= ~FATTR4_WORD0_TYPE;
2719
		ret = NFS_ATTR_FATTR_TYPE;
L
Linus Torvalds 已提交
2720
	}
2721
	dprintk("%s: type=0%o\n", __func__, nfs_type2fmt[*type]);
2722
	return ret;
B
Benny Halevy 已提交
2723 2724 2725
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
L
Linus Torvalds 已提交
2726 2727 2728 2729
}

static int decode_attr_change(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *change)
{
A
Al Viro 已提交
2730
	__be32 *p;
2731
	int ret = 0;
L
Linus Torvalds 已提交
2732 2733 2734 2735 2736

	*change = 0;
	if (unlikely(bitmap[0] & (FATTR4_WORD0_CHANGE - 1U)))
		return -EIO;
	if (likely(bitmap[0] & FATTR4_WORD0_CHANGE)) {
B
Benny Halevy 已提交
2737 2738 2739
		p = xdr_inline_decode(xdr, 8);
		if (unlikely(!p))
			goto out_overflow;
2740
		xdr_decode_hyper(p, change);
L
Linus Torvalds 已提交
2741
		bitmap[0] &= ~FATTR4_WORD0_CHANGE;
2742
		ret = NFS_ATTR_FATTR_CHANGE;
L
Linus Torvalds 已提交
2743
	}
2744
	dprintk("%s: change attribute=%Lu\n", __func__,
L
Linus Torvalds 已提交
2745
			(unsigned long long)*change);
2746
	return ret;
B
Benny Halevy 已提交
2747 2748 2749
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
L
Linus Torvalds 已提交
2750 2751 2752 2753
}

static int decode_attr_size(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *size)
{
A
Al Viro 已提交
2754
	__be32 *p;
2755
	int ret = 0;
L
Linus Torvalds 已提交
2756 2757 2758 2759 2760

	*size = 0;
	if (unlikely(bitmap[0] & (FATTR4_WORD0_SIZE - 1U)))
		return -EIO;
	if (likely(bitmap[0] & FATTR4_WORD0_SIZE)) {
B
Benny Halevy 已提交
2761 2762 2763
		p = xdr_inline_decode(xdr, 8);
		if (unlikely(!p))
			goto out_overflow;
2764
		xdr_decode_hyper(p, size);
L
Linus Torvalds 已提交
2765
		bitmap[0] &= ~FATTR4_WORD0_SIZE;
2766
		ret = NFS_ATTR_FATTR_SIZE;
L
Linus Torvalds 已提交
2767
	}
2768
	dprintk("%s: file size=%Lu\n", __func__, (unsigned long long)*size);
2769
	return ret;
B
Benny Halevy 已提交
2770 2771 2772
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
L
Linus Torvalds 已提交
2773 2774 2775 2776
}

static int decode_attr_link_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
{
A
Al Viro 已提交
2777
	__be32 *p;
L
Linus Torvalds 已提交
2778 2779 2780 2781 2782

	*res = 0;
	if (unlikely(bitmap[0] & (FATTR4_WORD0_LINK_SUPPORT - 1U)))
		return -EIO;
	if (likely(bitmap[0] & FATTR4_WORD0_LINK_SUPPORT)) {
B
Benny Halevy 已提交
2783 2784 2785
		p = xdr_inline_decode(xdr, 4);
		if (unlikely(!p))
			goto out_overflow;
2786
		*res = be32_to_cpup(p);
L
Linus Torvalds 已提交
2787 2788
		bitmap[0] &= ~FATTR4_WORD0_LINK_SUPPORT;
	}
2789
	dprintk("%s: link support=%s\n", __func__, *res == 0 ? "false" : "true");
L
Linus Torvalds 已提交
2790
	return 0;
B
Benny Halevy 已提交
2791 2792 2793
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
L
Linus Torvalds 已提交
2794 2795 2796 2797
}

static int decode_attr_symlink_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
{
A
Al Viro 已提交
2798
	__be32 *p;
L
Linus Torvalds 已提交
2799 2800 2801 2802 2803

	*res = 0;
	if (unlikely(bitmap[0] & (FATTR4_WORD0_SYMLINK_SUPPORT - 1U)))
		return -EIO;
	if (likely(bitmap[0] & FATTR4_WORD0_SYMLINK_SUPPORT)) {
B
Benny Halevy 已提交
2804 2805 2806
		p = xdr_inline_decode(xdr, 4);
		if (unlikely(!p))
			goto out_overflow;
2807
		*res = be32_to_cpup(p);
L
Linus Torvalds 已提交
2808 2809
		bitmap[0] &= ~FATTR4_WORD0_SYMLINK_SUPPORT;
	}
2810
	dprintk("%s: symlink support=%s\n", __func__, *res == 0 ? "false" : "true");
L
Linus Torvalds 已提交
2811
	return 0;
B
Benny Halevy 已提交
2812 2813 2814
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
L
Linus Torvalds 已提交
2815 2816
}

2817
static int decode_attr_fsid(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_fsid *fsid)
L
Linus Torvalds 已提交
2818
{
A
Al Viro 已提交
2819
	__be32 *p;
2820
	int ret = 0;
L
Linus Torvalds 已提交
2821 2822 2823 2824 2825 2826

	fsid->major = 0;
	fsid->minor = 0;
	if (unlikely(bitmap[0] & (FATTR4_WORD0_FSID - 1U)))
		return -EIO;
	if (likely(bitmap[0] & FATTR4_WORD0_FSID)) {
B
Benny Halevy 已提交
2827 2828 2829
		p = xdr_inline_decode(xdr, 16);
		if (unlikely(!p))
			goto out_overflow;
B
Benny Halevy 已提交
2830
		p = xdr_decode_hyper(p, &fsid->major);
2831
		xdr_decode_hyper(p, &fsid->minor);
L
Linus Torvalds 已提交
2832
		bitmap[0] &= ~FATTR4_WORD0_FSID;
2833
		ret = NFS_ATTR_FATTR_FSID;
L
Linus Torvalds 已提交
2834
	}
2835
	dprintk("%s: fsid=(0x%Lx/0x%Lx)\n", __func__,
L
Linus Torvalds 已提交
2836 2837
			(unsigned long long)fsid->major,
			(unsigned long long)fsid->minor);
2838
	return ret;
B
Benny Halevy 已提交
2839 2840 2841
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
L
Linus Torvalds 已提交
2842 2843 2844 2845
}

static int decode_attr_lease_time(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
{
A
Al Viro 已提交
2846
	__be32 *p;
L
Linus Torvalds 已提交
2847 2848 2849 2850 2851

	*res = 60;
	if (unlikely(bitmap[0] & (FATTR4_WORD0_LEASE_TIME - 1U)))
		return -EIO;
	if (likely(bitmap[0] & FATTR4_WORD0_LEASE_TIME)) {
B
Benny Halevy 已提交
2852 2853 2854
		p = xdr_inline_decode(xdr, 4);
		if (unlikely(!p))
			goto out_overflow;
2855
		*res = be32_to_cpup(p);
L
Linus Torvalds 已提交
2856 2857
		bitmap[0] &= ~FATTR4_WORD0_LEASE_TIME;
	}
2858
	dprintk("%s: file size=%u\n", __func__, (unsigned int)*res);
L
Linus Torvalds 已提交
2859
	return 0;
B
Benny Halevy 已提交
2860 2861 2862
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
L
Linus Torvalds 已提交
2863 2864
}

2865 2866 2867 2868 2869 2870 2871 2872 2873 2874 2875 2876 2877 2878 2879 2880 2881 2882 2883 2884 2885 2886 2887
static int decode_attr_error(struct xdr_stream *xdr, uint32_t *bitmap)
{
	__be32 *p;

	if (unlikely(bitmap[0] & (FATTR4_WORD0_RDATTR_ERROR - 1U)))
		return -EIO;
	if (likely(bitmap[0] & FATTR4_WORD0_RDATTR_ERROR)) {
		p = xdr_inline_decode(xdr, 4);
		if (unlikely(!p))
			goto out_overflow;
		bitmap[0] &= ~FATTR4_WORD0_RDATTR_ERROR;
	}
	return 0;
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
}

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

2888 2889
	if (fh != NULL)
		memset(fh, 0, sizeof(*fh));
2890 2891 2892 2893 2894 2895 2896 2897 2898 2899 2900 2901 2902

	if (unlikely(bitmap[0] & (FATTR4_WORD0_FILEHANDLE - 1U)))
		return -EIO;
	if (likely(bitmap[0] & FATTR4_WORD0_FILEHANDLE)) {
		p = xdr_inline_decode(xdr, 4);
		if (unlikely(!p))
			goto out_overflow;
		len = be32_to_cpup(p);
		if (len > NFS4_FHSIZE)
			return -EIO;
		p = xdr_inline_decode(xdr, len);
		if (unlikely(!p))
			goto out_overflow;
2903 2904 2905 2906
		if (fh != NULL) {
			memcpy(fh->data, p, len);
			fh->size = len;
		}
2907 2908 2909 2910 2911 2912 2913 2914
		bitmap[0] &= ~FATTR4_WORD0_FILEHANDLE;
	}
	return 0;
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
}

L
Linus Torvalds 已提交
2915 2916
static int decode_attr_aclsupport(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
{
A
Al Viro 已提交
2917
	__be32 *p;
L
Linus Torvalds 已提交
2918 2919 2920 2921 2922

	*res = ACL4_SUPPORT_ALLOW_ACL|ACL4_SUPPORT_DENY_ACL;
	if (unlikely(bitmap[0] & (FATTR4_WORD0_ACLSUPPORT - 1U)))
		return -EIO;
	if (likely(bitmap[0] & FATTR4_WORD0_ACLSUPPORT)) {
B
Benny Halevy 已提交
2923 2924 2925
		p = xdr_inline_decode(xdr, 4);
		if (unlikely(!p))
			goto out_overflow;
2926
		*res = be32_to_cpup(p);
L
Linus Torvalds 已提交
2927 2928
		bitmap[0] &= ~FATTR4_WORD0_ACLSUPPORT;
	}
2929
	dprintk("%s: ACLs supported=%u\n", __func__, (unsigned int)*res);
L
Linus Torvalds 已提交
2930
	return 0;
B
Benny Halevy 已提交
2931 2932 2933
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
L
Linus Torvalds 已提交
2934 2935 2936 2937
}

static int decode_attr_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
{
A
Al Viro 已提交
2938
	__be32 *p;
2939
	int ret = 0;
L
Linus Torvalds 已提交
2940 2941 2942 2943 2944

	*fileid = 0;
	if (unlikely(bitmap[0] & (FATTR4_WORD0_FILEID - 1U)))
		return -EIO;
	if (likely(bitmap[0] & FATTR4_WORD0_FILEID)) {
B
Benny Halevy 已提交
2945 2946 2947
		p = xdr_inline_decode(xdr, 8);
		if (unlikely(!p))
			goto out_overflow;
2948
		xdr_decode_hyper(p, fileid);
L
Linus Torvalds 已提交
2949
		bitmap[0] &= ~FATTR4_WORD0_FILEID;
2950
		ret = NFS_ATTR_FATTR_FILEID;
L
Linus Torvalds 已提交
2951
	}
2952
	dprintk("%s: fileid=%Lu\n", __func__, (unsigned long long)*fileid);
2953
	return ret;
B
Benny Halevy 已提交
2954 2955 2956
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
L
Linus Torvalds 已提交
2957 2958
}

2959 2960
static int decode_attr_mounted_on_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
{
A
Al Viro 已提交
2961
	__be32 *p;
2962
	int ret = 0;
2963 2964 2965 2966 2967

	*fileid = 0;
	if (unlikely(bitmap[1] & (FATTR4_WORD1_MOUNTED_ON_FILEID - 1U)))
		return -EIO;
	if (likely(bitmap[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)) {
B
Benny Halevy 已提交
2968 2969 2970
		p = xdr_inline_decode(xdr, 8);
		if (unlikely(!p))
			goto out_overflow;
2971
		xdr_decode_hyper(p, fileid);
2972
		bitmap[1] &= ~FATTR4_WORD1_MOUNTED_ON_FILEID;
2973
		ret = NFS_ATTR_FATTR_FILEID;
2974
	}
2975
	dprintk("%s: fileid=%Lu\n", __func__, (unsigned long long)*fileid);
2976
	return ret;
B
Benny Halevy 已提交
2977 2978 2979
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
2980 2981
}

L
Linus Torvalds 已提交
2982 2983
static int decode_attr_files_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
{
A
Al Viro 已提交
2984
	__be32 *p;
L
Linus Torvalds 已提交
2985 2986 2987 2988 2989 2990
	int status = 0;

	*res = 0;
	if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_AVAIL - 1U)))
		return -EIO;
	if (likely(bitmap[0] & FATTR4_WORD0_FILES_AVAIL)) {
B
Benny Halevy 已提交
2991 2992 2993
		p = xdr_inline_decode(xdr, 8);
		if (unlikely(!p))
			goto out_overflow;
2994
		xdr_decode_hyper(p, res);
L
Linus Torvalds 已提交
2995 2996
		bitmap[0] &= ~FATTR4_WORD0_FILES_AVAIL;
	}
2997
	dprintk("%s: files avail=%Lu\n", __func__, (unsigned long long)*res);
L
Linus Torvalds 已提交
2998
	return status;
B
Benny Halevy 已提交
2999 3000 3001
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
L
Linus Torvalds 已提交
3002 3003 3004 3005
}

static int decode_attr_files_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
{
A
Al Viro 已提交
3006
	__be32 *p;
L
Linus Torvalds 已提交
3007 3008 3009 3010 3011 3012
	int status = 0;

	*res = 0;
	if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_FREE - 1U)))
		return -EIO;
	if (likely(bitmap[0] & FATTR4_WORD0_FILES_FREE)) {
B
Benny Halevy 已提交
3013 3014 3015
		p = xdr_inline_decode(xdr, 8);
		if (unlikely(!p))
			goto out_overflow;
3016
		xdr_decode_hyper(p, res);
L
Linus Torvalds 已提交
3017 3018
		bitmap[0] &= ~FATTR4_WORD0_FILES_FREE;
	}
3019
	dprintk("%s: files free=%Lu\n", __func__, (unsigned long long)*res);
L
Linus Torvalds 已提交
3020
	return status;
B
Benny Halevy 已提交
3021 3022 3023
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
L
Linus Torvalds 已提交
3024 3025 3026 3027
}

static int decode_attr_files_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
{
A
Al Viro 已提交
3028
	__be32 *p;
L
Linus Torvalds 已提交
3029 3030 3031 3032 3033 3034
	int status = 0;

	*res = 0;
	if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_TOTAL - 1U)))
		return -EIO;
	if (likely(bitmap[0] & FATTR4_WORD0_FILES_TOTAL)) {
B
Benny Halevy 已提交
3035 3036 3037
		p = xdr_inline_decode(xdr, 8);
		if (unlikely(!p))
			goto out_overflow;
3038
		xdr_decode_hyper(p, res);
L
Linus Torvalds 已提交
3039 3040
		bitmap[0] &= ~FATTR4_WORD0_FILES_TOTAL;
	}
3041
	dprintk("%s: files total=%Lu\n", __func__, (unsigned long long)*res);
L
Linus Torvalds 已提交
3042
	return status;
B
Benny Halevy 已提交
3043 3044 3045
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
L
Linus Torvalds 已提交
3046 3047
}

3048 3049
static int decode_pathname(struct xdr_stream *xdr, struct nfs4_pathname *path)
{
3050
	u32 n;
A
Al Viro 已提交
3051
	__be32 *p;
3052 3053
	int status = 0;

B
Benny Halevy 已提交
3054 3055 3056
	p = xdr_inline_decode(xdr, 4);
	if (unlikely(!p))
		goto out_overflow;
3057
	n = be32_to_cpup(p);
3058 3059
	if (n == 0)
		goto root_path;
3060 3061 3062 3063 3064 3065 3066 3067 3068 3069 3070 3071 3072 3073 3074 3075 3076 3077 3078 3079
	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;
3080 3081 3082 3083 3084 3085 3086
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;
3087 3088 3089 3090
out_eio:
	dprintk(" status %d", status);
	status = -EIO;
	goto out;
B
Benny Halevy 已提交
3091 3092 3093
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
3094 3095 3096
}

static int decode_attr_fs_locations(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs4_fs_locations *res)
3097 3098
{
	int n;
A
Al Viro 已提交
3099
	__be32 *p;
3100 3101 3102 3103 3104 3105 3106
	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;
3107
	dprintk("%s: fsroot ", __func__);
3108
	status = decode_pathname(xdr, &res->fs_path);
3109 3110
	if (unlikely(status != 0))
		goto out;
B
Benny Halevy 已提交
3111 3112 3113
	p = xdr_inline_decode(xdr, 4);
	if (unlikely(!p))
		goto out_overflow;
3114
	n = be32_to_cpup(p);
3115 3116 3117 3118
	if (n <= 0)
		goto out_eio;
	res->nlocations = 0;
	while (res->nlocations < n) {
3119
		u32 m;
3120
		struct nfs4_fs_location *loc = &res->locations[res->nlocations];
3121

B
Benny Halevy 已提交
3122 3123 3124
		p = xdr_inline_decode(xdr, 4);
		if (unlikely(!p))
			goto out_overflow;
3125
		m = be32_to_cpup(p);
3126 3127

		loc->nservers = 0;
3128
		dprintk("%s: servers ", __func__);
3129 3130 3131 3132 3133 3134 3135 3136 3137
		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 {
3138 3139 3140
				unsigned int i;
				dprintk("%s: using first %u of %u servers "
					"returned for location %u\n",
3141
						__func__,
3142 3143
						NFS4_FS_LOCATION_MAXSERVERS,
						m, res->nlocations);
3144
				for (i = loc->nservers; i < m; i++) {
T
Trond Myklebust 已提交
3145
					unsigned int len;
3146 3147 3148 3149 3150 3151 3152 3153
					char *data;
					status = decode_opaque_inline(xdr, &len, &data);
					if (unlikely(status != 0))
						goto out_eio;
				}
			}
		}
		status = decode_pathname(xdr, &loc->rootpath);
3154 3155
		if (unlikely(status != 0))
			goto out_eio;
3156
		if (res->nlocations < NFS4_FS_LOCATIONS_MAXENTRIES)
3157 3158
			res->nlocations++;
	}
3159 3160
	if (res->nlocations != 0)
		status = NFS_ATTR_FATTR_V4_REFERRAL;
3161
out:
3162
	dprintk("%s: fs_locations done, error = %d\n", __func__, status);
3163
	return status;
B
Benny Halevy 已提交
3164 3165
out_overflow:
	print_overflow_msg(__func__, xdr);
3166 3167 3168 3169 3170
out_eio:
	status = -EIO;
	goto out;
}

L
Linus Torvalds 已提交
3171 3172
static int decode_attr_maxfilesize(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
{
A
Al Viro 已提交
3173
	__be32 *p;
L
Linus Torvalds 已提交
3174 3175 3176 3177 3178 3179
	int status = 0;

	*res = 0;
	if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXFILESIZE - 1U)))
		return -EIO;
	if (likely(bitmap[0] & FATTR4_WORD0_MAXFILESIZE)) {
B
Benny Halevy 已提交
3180 3181 3182
		p = xdr_inline_decode(xdr, 8);
		if (unlikely(!p))
			goto out_overflow;
3183
		xdr_decode_hyper(p, res);
L
Linus Torvalds 已提交
3184 3185
		bitmap[0] &= ~FATTR4_WORD0_MAXFILESIZE;
	}
3186
	dprintk("%s: maxfilesize=%Lu\n", __func__, (unsigned long long)*res);
L
Linus Torvalds 已提交
3187
	return status;
B
Benny Halevy 已提交
3188 3189 3190
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
L
Linus Torvalds 已提交
3191 3192 3193 3194
}

static int decode_attr_maxlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxlink)
{
A
Al Viro 已提交
3195
	__be32 *p;
L
Linus Torvalds 已提交
3196 3197 3198 3199 3200 3201
	int status = 0;

	*maxlink = 1;
	if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXLINK - 1U)))
		return -EIO;
	if (likely(bitmap[0] & FATTR4_WORD0_MAXLINK)) {
B
Benny Halevy 已提交
3202 3203 3204
		p = xdr_inline_decode(xdr, 4);
		if (unlikely(!p))
			goto out_overflow;
3205
		*maxlink = be32_to_cpup(p);
L
Linus Torvalds 已提交
3206 3207
		bitmap[0] &= ~FATTR4_WORD0_MAXLINK;
	}
3208
	dprintk("%s: maxlink=%u\n", __func__, *maxlink);
L
Linus Torvalds 已提交
3209
	return status;
B
Benny Halevy 已提交
3210 3211 3212
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
L
Linus Torvalds 已提交
3213 3214 3215 3216
}

static int decode_attr_maxname(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxname)
{
A
Al Viro 已提交
3217
	__be32 *p;
L
Linus Torvalds 已提交
3218 3219 3220 3221 3222 3223
	int status = 0;

	*maxname = 1024;
	if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXNAME - 1U)))
		return -EIO;
	if (likely(bitmap[0] & FATTR4_WORD0_MAXNAME)) {
B
Benny Halevy 已提交
3224 3225 3226
		p = xdr_inline_decode(xdr, 4);
		if (unlikely(!p))
			goto out_overflow;
3227
		*maxname = be32_to_cpup(p);
L
Linus Torvalds 已提交
3228 3229
		bitmap[0] &= ~FATTR4_WORD0_MAXNAME;
	}
3230
	dprintk("%s: maxname=%u\n", __func__, *maxname);
L
Linus Torvalds 已提交
3231
	return status;
B
Benny Halevy 已提交
3232 3233 3234
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
L
Linus Torvalds 已提交
3235 3236 3237 3238
}

static int decode_attr_maxread(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
{
A
Al Viro 已提交
3239
	__be32 *p;
L
Linus Torvalds 已提交
3240 3241 3242 3243 3244 3245 3246
	int status = 0;

	*res = 1024;
	if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXREAD - 1U)))
		return -EIO;
	if (likely(bitmap[0] & FATTR4_WORD0_MAXREAD)) {
		uint64_t maxread;
B
Benny Halevy 已提交
3247 3248 3249
		p = xdr_inline_decode(xdr, 8);
		if (unlikely(!p))
			goto out_overflow;
3250
		xdr_decode_hyper(p, &maxread);
L
Linus Torvalds 已提交
3251 3252 3253 3254 3255
		if (maxread > 0x7FFFFFFF)
			maxread = 0x7FFFFFFF;
		*res = (uint32_t)maxread;
		bitmap[0] &= ~FATTR4_WORD0_MAXREAD;
	}
3256
	dprintk("%s: maxread=%lu\n", __func__, (unsigned long)*res);
L
Linus Torvalds 已提交
3257
	return status;
B
Benny Halevy 已提交
3258 3259 3260
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
L
Linus Torvalds 已提交
3261 3262 3263 3264
}

static int decode_attr_maxwrite(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
{
A
Al Viro 已提交
3265
	__be32 *p;
L
Linus Torvalds 已提交
3266 3267 3268 3269 3270 3271 3272
	int status = 0;

	*res = 1024;
	if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXWRITE - 1U)))
		return -EIO;
	if (likely(bitmap[0] & FATTR4_WORD0_MAXWRITE)) {
		uint64_t maxwrite;
B
Benny Halevy 已提交
3273 3274 3275
		p = xdr_inline_decode(xdr, 8);
		if (unlikely(!p))
			goto out_overflow;
3276
		xdr_decode_hyper(p, &maxwrite);
L
Linus Torvalds 已提交
3277 3278 3279 3280 3281
		if (maxwrite > 0x7FFFFFFF)
			maxwrite = 0x7FFFFFFF;
		*res = (uint32_t)maxwrite;
		bitmap[0] &= ~FATTR4_WORD0_MAXWRITE;
	}
3282
	dprintk("%s: maxwrite=%lu\n", __func__, (unsigned long)*res);
L
Linus Torvalds 已提交
3283
	return status;
B
Benny Halevy 已提交
3284 3285 3286
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
L
Linus Torvalds 已提交
3287 3288
}

3289
static int decode_attr_mode(struct xdr_stream *xdr, uint32_t *bitmap, umode_t *mode)
L
Linus Torvalds 已提交
3290
{
3291
	uint32_t tmp;
A
Al Viro 已提交
3292
	__be32 *p;
3293
	int ret = 0;
L
Linus Torvalds 已提交
3294 3295 3296 3297 3298

	*mode = 0;
	if (unlikely(bitmap[1] & (FATTR4_WORD1_MODE - 1U)))
		return -EIO;
	if (likely(bitmap[1] & FATTR4_WORD1_MODE)) {
B
Benny Halevy 已提交
3299 3300 3301
		p = xdr_inline_decode(xdr, 4);
		if (unlikely(!p))
			goto out_overflow;
3302
		tmp = be32_to_cpup(p);
3303
		*mode = tmp & ~S_IFMT;
L
Linus Torvalds 已提交
3304
		bitmap[1] &= ~FATTR4_WORD1_MODE;
3305
		ret = NFS_ATTR_FATTR_MODE;
L
Linus Torvalds 已提交
3306
	}
3307
	dprintk("%s: file mode=0%o\n", __func__, (unsigned int)*mode);
3308
	return ret;
B
Benny Halevy 已提交
3309 3310 3311
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
L
Linus Torvalds 已提交
3312 3313 3314 3315
}

static int decode_attr_nlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *nlink)
{
A
Al Viro 已提交
3316
	__be32 *p;
3317
	int ret = 0;
L
Linus Torvalds 已提交
3318 3319 3320 3321 3322

	*nlink = 1;
	if (unlikely(bitmap[1] & (FATTR4_WORD1_NUMLINKS - 1U)))
		return -EIO;
	if (likely(bitmap[1] & FATTR4_WORD1_NUMLINKS)) {
B
Benny Halevy 已提交
3323 3324 3325
		p = xdr_inline_decode(xdr, 4);
		if (unlikely(!p))
			goto out_overflow;
3326
		*nlink = be32_to_cpup(p);
L
Linus Torvalds 已提交
3327
		bitmap[1] &= ~FATTR4_WORD1_NUMLINKS;
3328
		ret = NFS_ATTR_FATTR_NLINK;
L
Linus Torvalds 已提交
3329
	}
3330
	dprintk("%s: nlink=%u\n", __func__, (unsigned int)*nlink);
3331
	return ret;
B
Benny Halevy 已提交
3332 3333 3334
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
L
Linus Torvalds 已提交
3335 3336
}

3337 3338
static int decode_attr_owner(struct xdr_stream *xdr, uint32_t *bitmap,
		struct nfs_client *clp, uint32_t *uid, int may_sleep)
L
Linus Torvalds 已提交
3339
{
A
Al Viro 已提交
3340 3341
	uint32_t len;
	__be32 *p;
3342
	int ret = 0;
L
Linus Torvalds 已提交
3343 3344 3345 3346 3347

	*uid = -2;
	if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER - 1U)))
		return -EIO;
	if (likely(bitmap[1] & FATTR4_WORD1_OWNER)) {
B
Benny Halevy 已提交
3348 3349 3350
		p = xdr_inline_decode(xdr, 4);
		if (unlikely(!p))
			goto out_overflow;
3351
		len = be32_to_cpup(p);
B
Benny Halevy 已提交
3352 3353 3354
		p = xdr_inline_decode(xdr, len);
		if (unlikely(!p))
			goto out_overflow;
3355 3356 3357
		if (!may_sleep) {
			/* do nothing */
		} else if (len < XDR_MAX_NETOBJ) {
3358 3359 3360
			if (nfs_map_name_to_uid(clp, (char *)p, len, uid) == 0)
				ret = NFS_ATTR_FATTR_OWNER;
			else
L
Linus Torvalds 已提交
3361
				dprintk("%s: nfs_map_name_to_uid failed!\n",
3362
						__func__);
L
Linus Torvalds 已提交
3363
		} else
3364
			dprintk("%s: name too long (%u)!\n",
3365
					__func__, len);
L
Linus Torvalds 已提交
3366 3367
		bitmap[1] &= ~FATTR4_WORD1_OWNER;
	}
3368
	dprintk("%s: uid=%d\n", __func__, (int)*uid);
3369
	return ret;
B
Benny Halevy 已提交
3370 3371 3372
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
L
Linus Torvalds 已提交
3373 3374
}

3375 3376
static int decode_attr_group(struct xdr_stream *xdr, uint32_t *bitmap,
		struct nfs_client *clp, uint32_t *gid, int may_sleep)
L
Linus Torvalds 已提交
3377
{
A
Al Viro 已提交
3378 3379
	uint32_t len;
	__be32 *p;
3380
	int ret = 0;
L
Linus Torvalds 已提交
3381 3382 3383 3384 3385

	*gid = -2;
	if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER_GROUP - 1U)))
		return -EIO;
	if (likely(bitmap[1] & FATTR4_WORD1_OWNER_GROUP)) {
B
Benny Halevy 已提交
3386 3387 3388
		p = xdr_inline_decode(xdr, 4);
		if (unlikely(!p))
			goto out_overflow;
3389
		len = be32_to_cpup(p);
B
Benny Halevy 已提交
3390 3391 3392
		p = xdr_inline_decode(xdr, len);
		if (unlikely(!p))
			goto out_overflow;
3393 3394 3395
		if (!may_sleep) {
			/* do nothing */
		} else if (len < XDR_MAX_NETOBJ) {
3396 3397 3398
			if (nfs_map_group_to_gid(clp, (char *)p, len, gid) == 0)
				ret = NFS_ATTR_FATTR_GROUP;
			else
L
Linus Torvalds 已提交
3399
				dprintk("%s: nfs_map_group_to_gid failed!\n",
3400
						__func__);
L
Linus Torvalds 已提交
3401
		} else
3402
			dprintk("%s: name too long (%u)!\n",
3403
					__func__, len);
L
Linus Torvalds 已提交
3404 3405
		bitmap[1] &= ~FATTR4_WORD1_OWNER_GROUP;
	}
3406
	dprintk("%s: gid=%d\n", __func__, (int)*gid);
3407
	return ret;
B
Benny Halevy 已提交
3408 3409 3410
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
L
Linus Torvalds 已提交
3411 3412 3413 3414
}

static int decode_attr_rdev(struct xdr_stream *xdr, uint32_t *bitmap, dev_t *rdev)
{
A
Al Viro 已提交
3415 3416
	uint32_t major = 0, minor = 0;
	__be32 *p;
3417
	int ret = 0;
L
Linus Torvalds 已提交
3418 3419 3420 3421 3422 3423 3424

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

B
Benny Halevy 已提交
3425 3426 3427
		p = xdr_inline_decode(xdr, 8);
		if (unlikely(!p))
			goto out_overflow;
B
Benny Halevy 已提交
3428
		major = be32_to_cpup(p++);
3429
		minor = be32_to_cpup(p);
L
Linus Torvalds 已提交
3430 3431 3432 3433
		tmp = MKDEV(major, minor);
		if (MAJOR(tmp) == major && MINOR(tmp) == minor)
			*rdev = tmp;
		bitmap[1] &= ~ FATTR4_WORD1_RAWDEV;
3434
		ret = NFS_ATTR_FATTR_RDEV;
L
Linus Torvalds 已提交
3435
	}
3436
	dprintk("%s: rdev=(0x%x:0x%x)\n", __func__, major, minor);
3437
	return ret;
B
Benny Halevy 已提交
3438 3439 3440
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
L
Linus Torvalds 已提交
3441 3442 3443 3444
}

static int decode_attr_space_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
{
A
Al Viro 已提交
3445
	__be32 *p;
L
Linus Torvalds 已提交
3446 3447 3448 3449 3450 3451
	int status = 0;

	*res = 0;
	if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_AVAIL - 1U)))
		return -EIO;
	if (likely(bitmap[1] & FATTR4_WORD1_SPACE_AVAIL)) {
B
Benny Halevy 已提交
3452 3453 3454
		p = xdr_inline_decode(xdr, 8);
		if (unlikely(!p))
			goto out_overflow;
3455
		xdr_decode_hyper(p, res);
L
Linus Torvalds 已提交
3456 3457
		bitmap[1] &= ~FATTR4_WORD1_SPACE_AVAIL;
	}
3458
	dprintk("%s: space avail=%Lu\n", __func__, (unsigned long long)*res);
L
Linus Torvalds 已提交
3459
	return status;
B
Benny Halevy 已提交
3460 3461 3462
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
L
Linus Torvalds 已提交
3463 3464 3465 3466
}

static int decode_attr_space_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
{
A
Al Viro 已提交
3467
	__be32 *p;
L
Linus Torvalds 已提交
3468 3469 3470 3471 3472 3473
	int status = 0;

	*res = 0;
	if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_FREE - 1U)))
		return -EIO;
	if (likely(bitmap[1] & FATTR4_WORD1_SPACE_FREE)) {
B
Benny Halevy 已提交
3474 3475 3476
		p = xdr_inline_decode(xdr, 8);
		if (unlikely(!p))
			goto out_overflow;
3477
		xdr_decode_hyper(p, res);
L
Linus Torvalds 已提交
3478 3479
		bitmap[1] &= ~FATTR4_WORD1_SPACE_FREE;
	}
3480
	dprintk("%s: space free=%Lu\n", __func__, (unsigned long long)*res);
L
Linus Torvalds 已提交
3481
	return status;
B
Benny Halevy 已提交
3482 3483 3484
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
L
Linus Torvalds 已提交
3485 3486 3487 3488
}

static int decode_attr_space_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
{
A
Al Viro 已提交
3489
	__be32 *p;
L
Linus Torvalds 已提交
3490 3491 3492 3493 3494 3495
	int status = 0;

	*res = 0;
	if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_TOTAL - 1U)))
		return -EIO;
	if (likely(bitmap[1] & FATTR4_WORD1_SPACE_TOTAL)) {
B
Benny Halevy 已提交
3496 3497 3498
		p = xdr_inline_decode(xdr, 8);
		if (unlikely(!p))
			goto out_overflow;
3499
		xdr_decode_hyper(p, res);
L
Linus Torvalds 已提交
3500 3501
		bitmap[1] &= ~FATTR4_WORD1_SPACE_TOTAL;
	}
3502
	dprintk("%s: space total=%Lu\n", __func__, (unsigned long long)*res);
L
Linus Torvalds 已提交
3503
	return status;
B
Benny Halevy 已提交
3504 3505 3506
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
L
Linus Torvalds 已提交
3507 3508 3509 3510
}

static int decode_attr_space_used(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *used)
{
A
Al Viro 已提交
3511
	__be32 *p;
3512
	int ret = 0;
L
Linus Torvalds 已提交
3513 3514 3515 3516 3517

	*used = 0;
	if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_USED - 1U)))
		return -EIO;
	if (likely(bitmap[1] & FATTR4_WORD1_SPACE_USED)) {
B
Benny Halevy 已提交
3518 3519 3520
		p = xdr_inline_decode(xdr, 8);
		if (unlikely(!p))
			goto out_overflow;
3521
		xdr_decode_hyper(p, used);
L
Linus Torvalds 已提交
3522
		bitmap[1] &= ~FATTR4_WORD1_SPACE_USED;
3523
		ret = NFS_ATTR_FATTR_SPACE_USED;
L
Linus Torvalds 已提交
3524
	}
3525
	dprintk("%s: space used=%Lu\n", __func__,
L
Linus Torvalds 已提交
3526
			(unsigned long long)*used);
3527
	return ret;
B
Benny Halevy 已提交
3528 3529 3530
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
L
Linus Torvalds 已提交
3531 3532 3533 3534
}

static int decode_attr_time(struct xdr_stream *xdr, struct timespec *time)
{
A
Al Viro 已提交
3535
	__be32 *p;
L
Linus Torvalds 已提交
3536 3537 3538
	uint64_t sec;
	uint32_t nsec;

B
Benny Halevy 已提交
3539 3540 3541
	p = xdr_inline_decode(xdr, 12);
	if (unlikely(!p))
		goto out_overflow;
B
Benny Halevy 已提交
3542
	p = xdr_decode_hyper(p, &sec);
3543
	nsec = be32_to_cpup(p);
L
Linus Torvalds 已提交
3544 3545 3546
	time->tv_sec = (time_t)sec;
	time->tv_nsec = (long)nsec;
	return 0;
B
Benny Halevy 已提交
3547 3548 3549
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
L
Linus Torvalds 已提交
3550 3551 3552 3553 3554 3555 3556 3557 3558 3559 3560 3561
}

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);
3562 3563
		if (status == 0)
			status = NFS_ATTR_FATTR_ATIME;
L
Linus Torvalds 已提交
3564 3565
		bitmap[1] &= ~FATTR4_WORD1_TIME_ACCESS;
	}
3566
	dprintk("%s: atime=%ld\n", __func__, (long)time->tv_sec);
L
Linus Torvalds 已提交
3567 3568 3569 3570 3571 3572 3573 3574 3575 3576 3577 3578 3579
	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);
3580 3581
		if (status == 0)
			status = NFS_ATTR_FATTR_CTIME;
L
Linus Torvalds 已提交
3582 3583
		bitmap[1] &= ~FATTR4_WORD1_TIME_METADATA;
	}
3584
	dprintk("%s: ctime=%ld\n", __func__, (long)time->tv_sec);
L
Linus Torvalds 已提交
3585 3586 3587
	return status;
}

3588 3589 3590 3591 3592 3593 3594 3595 3596 3597 3598 3599 3600 3601 3602 3603 3604 3605
static int decode_attr_time_delta(struct xdr_stream *xdr, uint32_t *bitmap,
				  struct timespec *time)
{
	int status = 0;

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

L
Linus Torvalds 已提交
3606 3607 3608 3609 3610 3611 3612 3613 3614 3615
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);
3616 3617
		if (status == 0)
			status = NFS_ATTR_FATTR_MTIME;
L
Linus Torvalds 已提交
3618 3619
		bitmap[1] &= ~FATTR4_WORD1_TIME_MODIFY;
	}
3620
	dprintk("%s: mtime=%ld\n", __func__, (long)time->tv_sec);
L
Linus Torvalds 已提交
3621 3622 3623
	return status;
}

A
Al Viro 已提交
3624
static int verify_attr_len(struct xdr_stream *xdr, __be32 *savep, uint32_t attrlen)
L
Linus Torvalds 已提交
3625 3626 3627 3628 3629
{
	unsigned int attrwords = XDR_QUADLEN(attrlen);
	unsigned int nwords = xdr->p - savep;

	if (unlikely(attrwords != nwords)) {
3630 3631
		dprintk("%s: server returned incorrect attribute length: "
			"%u %c %u\n",
3632
				__func__,
L
Linus Torvalds 已提交
3633 3634 3635 3636 3637 3638 3639 3640 3641 3642
				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
3643
	__be32 *p;
L
Linus Torvalds 已提交
3644

B
Benny Halevy 已提交
3645 3646 3647
	p = xdr_inline_decode(xdr, 20);
	if (unlikely(!p))
		goto out_overflow;
B
Benny Halevy 已提交
3648
	cinfo->atomic = be32_to_cpup(p++);
B
Benny Halevy 已提交
3649
	p = xdr_decode_hyper(p, &cinfo->before);
3650
	xdr_decode_hyper(p, &cinfo->after);
L
Linus Torvalds 已提交
3651
	return 0;
B
Benny Halevy 已提交
3652 3653 3654
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
L
Linus Torvalds 已提交
3655 3656 3657 3658
}

static int decode_access(struct xdr_stream *xdr, struct nfs4_accessres *access)
{
A
Al Viro 已提交
3659
	__be32 *p;
L
Linus Torvalds 已提交
3660 3661 3662 3663 3664 3665
	uint32_t supp, acc;
	int status;

	status = decode_op_hdr(xdr, OP_ACCESS);
	if (status)
		return status;
B
Benny Halevy 已提交
3666 3667 3668
	p = xdr_inline_decode(xdr, 8);
	if (unlikely(!p))
		goto out_overflow;
B
Benny Halevy 已提交
3669
	supp = be32_to_cpup(p++);
3670
	acc = be32_to_cpup(p);
L
Linus Torvalds 已提交
3671 3672 3673
	access->supported = supp;
	access->access = acc;
	return 0;
B
Benny Halevy 已提交
3674 3675 3676
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
L
Linus Torvalds 已提交
3677 3678
}

3679
static int decode_opaque_fixed(struct xdr_stream *xdr, void *buf, size_t len)
L
Linus Torvalds 已提交
3680
{
A
Al Viro 已提交
3681
	__be32 *p;
3682 3683 3684 3685 3686 3687 3688 3689 3690 3691 3692 3693 3694 3695 3696 3697 3698

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

static int decode_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
{
	return decode_opaque_fixed(xdr, stateid->data, NFS4_STATEID_SIZE);
}

static int decode_close(struct xdr_stream *xdr, struct nfs_closeres *res)
{
L
Linus Torvalds 已提交
3699 3700 3701
	int status;

	status = decode_op_hdr(xdr, OP_CLOSE);
3702 3703
	if (status != -EIO)
		nfs_increment_open_seqid(status, res->seqid);
3704 3705 3706
	if (!status)
		status = decode_stateid(xdr, &res->stateid);
	return status;
L
Linus Torvalds 已提交
3707 3708
}

3709 3710 3711
static int decode_verifier(struct xdr_stream *xdr, void *verifier)
{
	return decode_opaque_fixed(xdr, verifier, 8);
L
Linus Torvalds 已提交
3712 3713 3714 3715 3716 3717 3718
}

static int decode_commit(struct xdr_stream *xdr, struct nfs_writeres *res)
{
	int status;

	status = decode_op_hdr(xdr, OP_COMMIT);
3719 3720 3721
	if (!status)
		status = decode_verifier(xdr, res->verf->verifier);
	return status;
L
Linus Torvalds 已提交
3722 3723 3724 3725
}

static int decode_create(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
{
A
Al Viro 已提交
3726
	__be32 *p;
L
Linus Torvalds 已提交
3727 3728 3729 3730 3731 3732 3733 3734
	uint32_t bmlen;
	int status;

	status = decode_op_hdr(xdr, OP_CREATE);
	if (status)
		return status;
	if ((status = decode_change_info(xdr, cinfo)))
		return status;
B
Benny Halevy 已提交
3735 3736 3737
	p = xdr_inline_decode(xdr, 4);
	if (unlikely(!p))
		goto out_overflow;
3738
	bmlen = be32_to_cpup(p);
B
Benny Halevy 已提交
3739 3740 3741 3742 3743 3744
	p = xdr_inline_decode(xdr, bmlen << 2);
	if (likely(p))
		return 0;
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
L
Linus Torvalds 已提交
3745 3746 3747 3748
}

static int decode_server_caps(struct xdr_stream *xdr, struct nfs4_server_caps_res *res)
{
A
Al Viro 已提交
3749
	__be32 *savep;
3750
	uint32_t attrlen, bitmap[2] = {0};
L
Linus Torvalds 已提交
3751 3752 3753 3754 3755 3756 3757 3758 3759 3760 3761 3762 3763 3764 3765 3766 3767 3768
	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:
3769
	dprintk("%s: xdr returned %d!\n", __func__, -status);
L
Linus Torvalds 已提交
3770 3771
	return status;
}
3772

L
Linus Torvalds 已提交
3773 3774
static int decode_statfs(struct xdr_stream *xdr, struct nfs_fsstat *fsstat)
{
A
Al Viro 已提交
3775
	__be32 *savep;
3776
	uint32_t attrlen, bitmap[2] = {0};
L
Linus Torvalds 已提交
3777
	int status;
3778

L
Linus Torvalds 已提交
3779 3780 3781 3782 3783 3784 3785 3786 3787 3788 3789 3790 3791 3792 3793 3794 3795 3796 3797 3798 3799 3800
	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:
3801
	dprintk("%s: xdr returned %d!\n", __func__, -status);
L
Linus Torvalds 已提交
3802 3803 3804 3805 3806
	return status;
}

static int decode_pathconf(struct xdr_stream *xdr, struct nfs_pathconf *pathconf)
{
A
Al Viro 已提交
3807
	__be32 *savep;
3808
	uint32_t attrlen, bitmap[2] = {0};
L
Linus Torvalds 已提交
3809
	int status;
3810

L
Linus Torvalds 已提交
3811 3812 3813 3814 3815 3816 3817 3818 3819 3820 3821 3822 3823 3824
	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:
3825
	dprintk("%s: xdr returned %d!\n", __func__, -status);
L
Linus Torvalds 已提交
3826 3827 3828
	return status;
}

3829 3830
static int decode_getfattr_attrs(struct xdr_stream *xdr, uint32_t *bitmap,
		struct nfs_fattr *fattr, struct nfs_fh *fh,
3831
		const struct nfs_server *server, int may_sleep)
L
Linus Torvalds 已提交
3832
{
3833 3834
	int status;
	umode_t fmode = 0;
3835
	uint64_t fileid;
3836
	uint32_t type;
L
Linus Torvalds 已提交
3837

3838 3839
	status = decode_attr_type(xdr, bitmap, &type);
	if (status < 0)
L
Linus Torvalds 已提交
3840
		goto xdr_error;
3841 3842 3843 3844 3845
	fattr->mode = 0;
	if (status != 0) {
		fattr->mode |= nfs_type2fmt[type];
		fattr->valid |= status;
	}
L
Linus Torvalds 已提交
3846

3847 3848
	status = decode_attr_change(xdr, bitmap, &fattr->change_attr);
	if (status < 0)
L
Linus Torvalds 已提交
3849
		goto xdr_error;
3850
	fattr->valid |= status;
3851 3852 3853

	status = decode_attr_size(xdr, bitmap, &fattr->size);
	if (status < 0)
L
Linus Torvalds 已提交
3854
		goto xdr_error;
3855
	fattr->valid |= status;
3856 3857 3858

	status = decode_attr_fsid(xdr, bitmap, &fattr->fsid);
	if (status < 0)
L
Linus Torvalds 已提交
3859
		goto xdr_error;
3860
	fattr->valid |= status;
3861

3862 3863 3864 3865 3866 3867 3868 3869
	status = decode_attr_error(xdr, bitmap);
	if (status < 0)
		goto xdr_error;

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

3870 3871
	status = decode_attr_fileid(xdr, bitmap, &fattr->fileid);
	if (status < 0)
L
Linus Torvalds 已提交
3872
		goto xdr_error;
3873
	fattr->valid |= status;
3874 3875

	status = decode_attr_fs_locations(xdr, bitmap, container_of(fattr,
3876
						struct nfs4_fs_locations,
3877 3878
						fattr));
	if (status < 0)
3879
		goto xdr_error;
3880
	fattr->valid |= status;
3881 3882 3883

	status = decode_attr_mode(xdr, bitmap, &fmode);
	if (status < 0)
L
Linus Torvalds 已提交
3884
		goto xdr_error;
3885 3886 3887 3888
	if (status != 0) {
		fattr->mode |= fmode;
		fattr->valid |= status;
	}
3889 3890 3891

	status = decode_attr_nlink(xdr, bitmap, &fattr->nlink);
	if (status < 0)
L
Linus Torvalds 已提交
3892
		goto xdr_error;
3893
	fattr->valid |= status;
3894

3895 3896
	status = decode_attr_owner(xdr, bitmap, server->nfs_client,
			&fattr->uid, may_sleep);
3897
	if (status < 0)
L
Linus Torvalds 已提交
3898
		goto xdr_error;
3899
	fattr->valid |= status;
3900

3901 3902
	status = decode_attr_group(xdr, bitmap, server->nfs_client,
			&fattr->gid, may_sleep);
3903
	if (status < 0)
L
Linus Torvalds 已提交
3904
		goto xdr_error;
3905
	fattr->valid |= status;
3906 3907 3908

	status = decode_attr_rdev(xdr, bitmap, &fattr->rdev);
	if (status < 0)
L
Linus Torvalds 已提交
3909
		goto xdr_error;
3910
	fattr->valid |= status;
3911 3912 3913

	status = decode_attr_space_used(xdr, bitmap, &fattr->du.nfs3.used);
	if (status < 0)
L
Linus Torvalds 已提交
3914
		goto xdr_error;
3915
	fattr->valid |= status;
3916 3917 3918

	status = decode_attr_time_access(xdr, bitmap, &fattr->atime);
	if (status < 0)
L
Linus Torvalds 已提交
3919
		goto xdr_error;
3920
	fattr->valid |= status;
3921 3922 3923

	status = decode_attr_time_metadata(xdr, bitmap, &fattr->ctime);
	if (status < 0)
L
Linus Torvalds 已提交
3924
		goto xdr_error;
3925
	fattr->valid |= status;
3926 3927 3928

	status = decode_attr_time_modify(xdr, bitmap, &fattr->mtime);
	if (status < 0)
L
Linus Torvalds 已提交
3929
		goto xdr_error;
3930
	fattr->valid |= status;
3931 3932 3933

	status = decode_attr_mounted_on_fileid(xdr, bitmap, &fileid);
	if (status < 0)
3934
		goto xdr_error;
3935
	if (status != 0 && !(fattr->valid & status)) {
3936
		fattr->fileid = fileid;
3937 3938
		fattr->valid |= status;
	}
3939

3940 3941 3942 3943 3944 3945 3946 3947 3948 3949 3950 3951 3952 3953 3954 3955 3956 3957 3958 3959 3960 3961 3962 3963 3964 3965 3966 3967 3968
xdr_error:
	dprintk("%s: xdr returned %d\n", __func__, -status);
	return status;
}

static int decode_getfattr_generic(struct xdr_stream *xdr, struct nfs_fattr *fattr,
		struct nfs_fh *fh, const struct nfs_server *server, int may_sleep)
{
	__be32 *savep;
	uint32_t attrlen,
		 bitmap[2] = {0};
	int status;

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

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

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

	status = decode_getfattr_attrs(xdr, bitmap, fattr, fh, server, may_sleep);
	if (status < 0)
		goto xdr_error;

3969
	status = verify_attr_len(xdr, savep, attrlen);
L
Linus Torvalds 已提交
3970
xdr_error:
3971
	dprintk("%s: xdr returned %d\n", __func__, -status);
L
Linus Torvalds 已提交
3972 3973 3974
	return status;
}

3975 3976 3977 3978 3979
static int decode_getfattr(struct xdr_stream *xdr, struct nfs_fattr *fattr,
		const struct nfs_server *server, int may_sleep)
{
	return decode_getfattr_generic(xdr, fattr, NULL, server, may_sleep);
}
L
Linus Torvalds 已提交
3980 3981 3982

static int decode_fsinfo(struct xdr_stream *xdr, struct nfs_fsinfo *fsinfo)
{
A
Al Viro 已提交
3983
	__be32 *savep;
L
Linus Torvalds 已提交
3984 3985 3986 3987 3988 3989 3990 3991 3992 3993 3994 3995 3996 3997 3998 3999 4000 4001 4002 4003 4004 4005
	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;
4006 4007 4008
	status = decode_attr_time_delta(xdr, bitmap, &fsinfo->time_delta);
	if (status != 0)
		goto xdr_error;
L
Linus Torvalds 已提交
4009 4010 4011

	status = verify_attr_len(xdr, savep, attrlen);
xdr_error:
4012
	dprintk("%s: xdr returned %d!\n", __func__, -status);
L
Linus Torvalds 已提交
4013 4014 4015 4016 4017
	return status;
}

static int decode_getfh(struct xdr_stream *xdr, struct nfs_fh *fh)
{
A
Al Viro 已提交
4018
	__be32 *p;
L
Linus Torvalds 已提交
4019 4020 4021
	uint32_t len;
	int status;

4022 4023 4024
	/* Zero handle first to allow comparisons */
	memset(fh, 0, sizeof(*fh));

L
Linus Torvalds 已提交
4025 4026 4027 4028
	status = decode_op_hdr(xdr, OP_GETFH);
	if (status)
		return status;

B
Benny Halevy 已提交
4029 4030 4031
	p = xdr_inline_decode(xdr, 4);
	if (unlikely(!p))
		goto out_overflow;
4032
	len = be32_to_cpup(p);
L
Linus Torvalds 已提交
4033 4034 4035
	if (len > NFS4_FHSIZE)
		return -EIO;
	fh->size = len;
B
Benny Halevy 已提交
4036 4037 4038
	p = xdr_inline_decode(xdr, len);
	if (unlikely(!p))
		goto out_overflow;
B
Benny Halevy 已提交
4039
	memcpy(fh->data, p, len);
L
Linus Torvalds 已提交
4040
	return 0;
B
Benny Halevy 已提交
4041 4042 4043
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
L
Linus Torvalds 已提交
4044 4045 4046 4047 4048
}

static int decode_link(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
{
	int status;
4049

L
Linus Torvalds 已提交
4050 4051 4052 4053 4054 4055 4056 4057 4058
	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
4059
static int decode_lock_denied (struct xdr_stream *xdr, struct file_lock *fl)
L
Linus Torvalds 已提交
4060
{
T
Trond Myklebust 已提交
4061
	uint64_t offset, length, clientid;
A
Al Viro 已提交
4062
	__be32 *p;
T
Trond Myklebust 已提交
4063
	uint32_t namelen, type;
L
Linus Torvalds 已提交
4064

4065
	p = xdr_inline_decode(xdr, 32); /* read 32 bytes */
B
Benny Halevy 已提交
4066 4067
	if (unlikely(!p))
		goto out_overflow;
4068
	p = xdr_decode_hyper(p, &offset); /* read 2 8-byte long words */
B
Benny Halevy 已提交
4069
	p = xdr_decode_hyper(p, &length);
4070 4071
	type = be32_to_cpup(p++); /* 4 byte read */
	if (fl != NULL) { /* manipulate file lock */
T
Trond Myklebust 已提交
4072 4073 4074 4075 4076 4077 4078 4079 4080
		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;
	}
4081 4082 4083
	p = xdr_decode_hyper(p, &clientid); /* read 8 bytes */
	namelen = be32_to_cpup(p); /* read 4 bytes */  /* have read all 32 bytes now */
	p = xdr_inline_decode(xdr, namelen); /* variable size field */
B
Benny Halevy 已提交
4084 4085 4086 4087 4088
	if (likely(p))
		return -NFS4ERR_DENIED;
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
L
Linus Torvalds 已提交
4089 4090
}

T
Trond Myklebust 已提交
4091
static int decode_lock(struct xdr_stream *xdr, struct nfs_lock_res *res)
L
Linus Torvalds 已提交
4092 4093 4094 4095
{
	int status;

	status = decode_op_hdr(xdr, OP_LOCK);
4096 4097
	if (status == -EIO)
		goto out;
L
Linus Torvalds 已提交
4098
	if (status == 0) {
4099 4100 4101
		status = decode_stateid(xdr, &res->stateid);
		if (unlikely(status))
			goto out;
L
Linus Torvalds 已提交
4102
	} else if (status == -NFS4ERR_DENIED)
4103 4104 4105 4106 4107
		status = decode_lock_denied(xdr, NULL);
	if (res->open_seqid != NULL)
		nfs_increment_open_seqid(status, res->open_seqid);
	nfs_increment_lock_seqid(status, res->lock_seqid);
out:
L
Linus Torvalds 已提交
4108 4109 4110
	return status;
}

T
Trond Myklebust 已提交
4111
static int decode_lockt(struct xdr_stream *xdr, struct nfs_lockt_res *res)
L
Linus Torvalds 已提交
4112 4113 4114 4115
{
	int status;
	status = decode_op_hdr(xdr, OP_LOCKT);
	if (status == -NFS4ERR_DENIED)
T
Trond Myklebust 已提交
4116
		return decode_lock_denied(xdr, res->denied);
L
Linus Torvalds 已提交
4117 4118 4119
	return status;
}

T
Trond Myklebust 已提交
4120
static int decode_locku(struct xdr_stream *xdr, struct nfs_locku_res *res)
L
Linus Torvalds 已提交
4121 4122 4123 4124
{
	int status;

	status = decode_op_hdr(xdr, OP_LOCKU);
4125 4126
	if (status != -EIO)
		nfs_increment_lock_seqid(status, res->seqid);
4127 4128
	if (status == 0)
		status = decode_stateid(xdr, &res->stateid);
L
Linus Torvalds 已提交
4129 4130 4131
	return status;
}

4132 4133 4134 4135 4136
static int decode_release_lockowner(struct xdr_stream *xdr)
{
	return decode_op_hdr(xdr, OP_RELEASE_LOCKOWNER);
}

L
Linus Torvalds 已提交
4137 4138 4139 4140 4141 4142 4143 4144
static int decode_lookup(struct xdr_stream *xdr)
{
	return decode_op_hdr(xdr, OP_LOOKUP);
}

/* This is too sick! */
static int decode_space_limit(struct xdr_stream *xdr, u64 *maxsize)
{
A
Andy Adamson 已提交
4145
	__be32 *p;
L
Linus Torvalds 已提交
4146 4147
	uint32_t limit_type, nblocks, blocksize;

B
Benny Halevy 已提交
4148 4149 4150
	p = xdr_inline_decode(xdr, 12);
	if (unlikely(!p))
		goto out_overflow;
B
Benny Halevy 已提交
4151
	limit_type = be32_to_cpup(p++);
L
Linus Torvalds 已提交
4152
	switch (limit_type) {
A
Andy Adamson 已提交
4153
	case 1:
4154
		xdr_decode_hyper(p, maxsize);
A
Andy Adamson 已提交
4155 4156
		break;
	case 2:
B
Benny Halevy 已提交
4157
		nblocks = be32_to_cpup(p++);
4158
		blocksize = be32_to_cpup(p);
A
Andy Adamson 已提交
4159
		*maxsize = (uint64_t)nblocks * (uint64_t)blocksize;
L
Linus Torvalds 已提交
4160 4161
	}
	return 0;
B
Benny Halevy 已提交
4162 4163 4164
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
L
Linus Torvalds 已提交
4165 4166 4167 4168
}

static int decode_delegation(struct xdr_stream *xdr, struct nfs_openres *res)
{
A
Andy Adamson 已提交
4169 4170
	__be32 *p;
	uint32_t delegation_type;
4171
	int status;
L
Linus Torvalds 已提交
4172

B
Benny Halevy 已提交
4173 4174 4175
	p = xdr_inline_decode(xdr, 4);
	if (unlikely(!p))
		goto out_overflow;
4176
	delegation_type = be32_to_cpup(p);
L
Linus Torvalds 已提交
4177 4178 4179 4180
	if (delegation_type == NFS4_OPEN_DELEGATE_NONE) {
		res->delegation_type = 0;
		return 0;
	}
4181 4182 4183
	status = decode_stateid(xdr, &res->delegation);
	if (unlikely(status))
		return status;
B
Benny Halevy 已提交
4184 4185 4186
	p = xdr_inline_decode(xdr, 4);
	if (unlikely(!p))
		goto out_overflow;
4187
	res->do_recall = be32_to_cpup(p);
A
Andy Adamson 已提交
4188

L
Linus Torvalds 已提交
4189
	switch (delegation_type) {
A
Andy Adamson 已提交
4190 4191 4192 4193 4194 4195
	case NFS4_OPEN_DELEGATE_READ:
		res->delegation_type = FMODE_READ;
		break;
	case NFS4_OPEN_DELEGATE_WRITE:
		res->delegation_type = FMODE_WRITE|FMODE_READ;
		if (decode_space_limit(xdr, &res->maxsize) < 0)
L
Linus Torvalds 已提交
4196 4197
				return -EIO;
	}
4198
	return decode_ace(xdr, NULL, res->server->nfs_client);
B
Benny Halevy 已提交
4199 4200 4201
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
L
Linus Torvalds 已提交
4202 4203 4204 4205
}

static int decode_open(struct xdr_stream *xdr, struct nfs_openres *res)
{
A
Andy Adamson 已提交
4206
	__be32 *p;
4207
	uint32_t savewords, bmlen, i;
A
Andy Adamson 已提交
4208
	int status;
L
Linus Torvalds 已提交
4209

A
Andy Adamson 已提交
4210
	status = decode_op_hdr(xdr, OP_OPEN);
4211 4212
	if (status != -EIO)
		nfs_increment_open_seqid(status, res->seqid);
4213 4214 4215
	if (!status)
		status = decode_stateid(xdr, &res->stateid);
	if (unlikely(status))
A
Andy Adamson 已提交
4216
		return status;
L
Linus Torvalds 已提交
4217

A
Andy Adamson 已提交
4218
	decode_change_info(xdr, &res->cinfo);
L
Linus Torvalds 已提交
4219

B
Benny Halevy 已提交
4220 4221 4222
	p = xdr_inline_decode(xdr, 8);
	if (unlikely(!p))
		goto out_overflow;
B
Benny Halevy 已提交
4223
	res->rflags = be32_to_cpup(p++);
4224
	bmlen = be32_to_cpup(p);
A
Andy Adamson 已提交
4225 4226
	if (bmlen > 10)
		goto xdr_error;
L
Linus Torvalds 已提交
4227

B
Benny Halevy 已提交
4228 4229 4230
	p = xdr_inline_decode(xdr, bmlen << 2);
	if (unlikely(!p))
		goto out_overflow;
4231 4232
	savewords = min_t(uint32_t, bmlen, NFS4_BITMAP_SIZE);
	for (i = 0; i < savewords; ++i)
B
Benny Halevy 已提交
4233
		res->attrset[i] = be32_to_cpup(p++);
4234 4235 4236
	for (; i < NFS4_BITMAP_SIZE; i++)
		res->attrset[i] = 0;

L
Linus Torvalds 已提交
4237 4238
	return decode_delegation(xdr, res);
xdr_error:
4239
	dprintk("%s: Bitmap too large! Length = %u\n", __func__, bmlen);
L
Linus Torvalds 已提交
4240
	return -EIO;
B
Benny Halevy 已提交
4241 4242 4243
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
L
Linus Torvalds 已提交
4244 4245 4246 4247 4248 4249
}

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

A
Andy Adamson 已提交
4250
	status = decode_op_hdr(xdr, OP_OPEN_CONFIRM);
4251 4252
	if (status != -EIO)
		nfs_increment_open_seqid(status, res->seqid);
4253 4254 4255
	if (!status)
		status = decode_stateid(xdr, &res->stateid);
	return status;
L
Linus Torvalds 已提交
4256 4257 4258 4259 4260 4261 4262
}

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

	status = decode_op_hdr(xdr, OP_OPEN_DOWNGRADE);
4263 4264
	if (status != -EIO)
		nfs_increment_open_seqid(status, res->seqid);
4265 4266 4267
	if (!status)
		status = decode_stateid(xdr, &res->stateid);
	return status;
L
Linus Torvalds 已提交
4268 4269 4270 4271 4272 4273 4274 4275 4276 4277 4278 4279 4280 4281 4282
}

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
4283
	__be32 *p;
L
Linus Torvalds 已提交
4284 4285 4286 4287 4288 4289
	uint32_t count, eof, recvd, hdrlen;
	int status;

	status = decode_op_hdr(xdr, OP_READ);
	if (status)
		return status;
B
Benny Halevy 已提交
4290 4291 4292
	p = xdr_inline_decode(xdr, 8);
	if (unlikely(!p))
		goto out_overflow;
B
Benny Halevy 已提交
4293
	eof = be32_to_cpup(p++);
4294
	count = be32_to_cpup(p);
L
Linus Torvalds 已提交
4295 4296 4297
	hdrlen = (u8 *) p - (u8 *) iov->iov_base;
	recvd = req->rq_rcv_buf.len - hdrlen;
	if (count > recvd) {
4298
		dprintk("NFS: server cheating in read reply: "
L
Linus Torvalds 已提交
4299 4300 4301 4302 4303 4304 4305 4306
				"count %u > recvd %u\n", count, recvd);
		count = recvd;
		eof = 0;
	}
	xdr_read_pages(xdr, count);
	res->eof = eof;
	res->count = count;
	return 0;
B
Benny Halevy 已提交
4307 4308 4309
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
L
Linus Torvalds 已提交
4310 4311 4312 4313 4314 4315
}

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 kvec	*iov = rcvbuf->head;
4316 4317 4318
	size_t		hdrlen;
	u32		recvd, pglen = rcvbuf->page_len;
	int		status;
L
Linus Torvalds 已提交
4319 4320

	status = decode_op_hdr(xdr, OP_READDIR);
4321 4322 4323
	if (!status)
		status = decode_verifier(xdr, readdir->verifier.data);
	if (unlikely(status))
L
Linus Torvalds 已提交
4324
		return status;
4325 4326
	dprintk("%s: verifier = %08x:%08x\n",
			__func__,
4327 4328 4329
			((u32 *)readdir->verifier.data)[0],
			((u32 *)readdir->verifier.data)[1]);

L
Linus Torvalds 已提交
4330

4331
	hdrlen = (char *) xdr->p - (char *) iov->iov_base;
L
Linus Torvalds 已提交
4332 4333 4334 4335 4336
	recvd = rcvbuf->len - hdrlen;
	if (pglen > recvd)
		pglen = recvd;
	xdr_read_pages(xdr, pglen);

4337

L
Linus Torvalds 已提交
4338 4339 4340 4341 4342 4343 4344
	return 0;
}

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;
4345 4346
	size_t hdrlen;
	u32 len, recvd;
A
Al Viro 已提交
4347
	__be32 *p;
L
Linus Torvalds 已提交
4348 4349 4350 4351 4352 4353 4354
	int status;

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

	/* Convert length of symlink */
B
Benny Halevy 已提交
4355 4356 4357
	p = xdr_inline_decode(xdr, 4);
	if (unlikely(!p))
		goto out_overflow;
4358
	len = be32_to_cpup(p);
L
Linus Torvalds 已提交
4359
	if (len >= rcvbuf->page_len || len <= 0) {
4360
		dprintk("nfs: server returned giant symlink!\n");
L
Linus Torvalds 已提交
4361 4362 4363 4364 4365
		return -ENAMETOOLONG;
	}
	hdrlen = (char *) xdr->p - (char *) iov->iov_base;
	recvd = req->rq_rcv_buf.len - hdrlen;
	if (recvd < len) {
4366
		dprintk("NFS: server cheating in readlink reply: "
L
Linus Torvalds 已提交
4367 4368 4369 4370 4371 4372 4373 4374 4375 4376 4377
				"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).
	 */
4378
	xdr_terminate_string(rcvbuf, len);
L
Linus Torvalds 已提交
4379
	return 0;
B
Benny Halevy 已提交
4380 4381 4382
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
L
Linus Torvalds 已提交
4383 4384 4385 4386 4387 4388 4389 4390 4391 4392 4393 4394 4395 4396 4397 4398 4399 4400 4401 4402 4403 4404 4405 4406 4407 4408 4409 4410 4411 4412 4413 4414 4415 4416
}

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);
}

4417 4418 4419 4420 4421 4422
static int
decode_restorefh(struct xdr_stream *xdr)
{
	return decode_op_hdr(xdr, OP_RESTOREFH);
}

4423 4424 4425
static int decode_getacl(struct xdr_stream *xdr, struct rpc_rqst *req,
		size_t *acl_len)
{
A
Al Viro 已提交
4426
	__be32 *savep;
4427 4428 4429 4430 4431 4432 4433 4434 4435 4436 4437 4438 4439 4440 4441 4442
	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)) {
4443 4444
		size_t hdrlen;
		u32 recvd;
4445 4446 4447 4448 4449 4450

		/* 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) {
4451
			dprintk("NFS: server cheating in getattr"
4452 4453 4454 4455
					" acl reply: attrlen %u > recvd %u\n",
					attrlen, recvd);
			return -EINVAL;
		}
4456
		xdr_read_pages(xdr, attrlen);
4457
		*acl_len = attrlen;
J
J. Bruce Fields 已提交
4458 4459
	} else
		status = -EOPNOTSUPP;
4460 4461 4462 4463 4464

out:
	return status;
}

L
Linus Torvalds 已提交
4465 4466 4467 4468 4469 4470
static int
decode_savefh(struct xdr_stream *xdr)
{
	return decode_op_hdr(xdr, OP_SAVEFH);
}

4471
static int decode_setattr(struct xdr_stream *xdr)
L
Linus Torvalds 已提交
4472
{
A
Al Viro 已提交
4473
	__be32 *p;
L
Linus Torvalds 已提交
4474 4475 4476 4477 4478 4479
	uint32_t bmlen;
	int status;

	status = decode_op_hdr(xdr, OP_SETATTR);
	if (status)
		return status;
B
Benny Halevy 已提交
4480 4481 4482
	p = xdr_inline_decode(xdr, 4);
	if (unlikely(!p))
		goto out_overflow;
4483
	bmlen = be32_to_cpup(p);
B
Benny Halevy 已提交
4484 4485 4486 4487 4488 4489
	p = xdr_inline_decode(xdr, bmlen << 2);
	if (likely(p))
		return 0;
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
L
Linus Torvalds 已提交
4490 4491
}

4492
static int decode_setclientid(struct xdr_stream *xdr, struct nfs4_setclientid_res *res)
L
Linus Torvalds 已提交
4493
{
A
Al Viro 已提交
4494
	__be32 *p;
L
Linus Torvalds 已提交
4495 4496 4497
	uint32_t opnum;
	int32_t nfserr;

B
Benny Halevy 已提交
4498 4499 4500
	p = xdr_inline_decode(xdr, 8);
	if (unlikely(!p))
		goto out_overflow;
B
Benny Halevy 已提交
4501
	opnum = be32_to_cpup(p++);
L
Linus Torvalds 已提交
4502
	if (opnum != OP_SETCLIENTID) {
4503
		dprintk("nfs: decode_setclientid: Server returned operation"
4504
			" %d\n", opnum);
L
Linus Torvalds 已提交
4505 4506
		return -EIO;
	}
4507
	nfserr = be32_to_cpup(p);
L
Linus Torvalds 已提交
4508
	if (nfserr == NFS_OK) {
B
Benny Halevy 已提交
4509 4510 4511
		p = xdr_inline_decode(xdr, 8 + NFS4_VERIFIER_SIZE);
		if (unlikely(!p))
			goto out_overflow;
4512 4513
		p = xdr_decode_hyper(p, &res->clientid);
		memcpy(res->confirm.data, p, NFS4_VERIFIER_SIZE);
L
Linus Torvalds 已提交
4514 4515 4516 4517
	} else if (nfserr == NFSERR_CLID_INUSE) {
		uint32_t len;

		/* skip netid string */
B
Benny Halevy 已提交
4518 4519 4520
		p = xdr_inline_decode(xdr, 4);
		if (unlikely(!p))
			goto out_overflow;
4521
		len = be32_to_cpup(p);
B
Benny Halevy 已提交
4522 4523 4524
		p = xdr_inline_decode(xdr, len);
		if (unlikely(!p))
			goto out_overflow;
L
Linus Torvalds 已提交
4525 4526

		/* skip uaddr string */
B
Benny Halevy 已提交
4527 4528 4529
		p = xdr_inline_decode(xdr, 4);
		if (unlikely(!p))
			goto out_overflow;
4530
		len = be32_to_cpup(p);
B
Benny Halevy 已提交
4531 4532 4533
		p = xdr_inline_decode(xdr, len);
		if (unlikely(!p))
			goto out_overflow;
L
Linus Torvalds 已提交
4534 4535
		return -NFSERR_CLID_INUSE;
	} else
4536
		return nfs4_stat_to_errno(nfserr);
L
Linus Torvalds 已提交
4537 4538

	return 0;
B
Benny Halevy 已提交
4539 4540 4541
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
L
Linus Torvalds 已提交
4542 4543 4544 4545 4546 4547 4548 4549 4550
}

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
4551
	__be32 *p;
L
Linus Torvalds 已提交
4552 4553 4554 4555 4556 4557
	int status;

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

B
Benny Halevy 已提交
4558 4559 4560
	p = xdr_inline_decode(xdr, 16);
	if (unlikely(!p))
		goto out_overflow;
B
Benny Halevy 已提交
4561 4562
	res->count = be32_to_cpup(p++);
	res->verf->committed = be32_to_cpup(p++);
B
Benny Halevy 已提交
4563
	memcpy(res->verf->verifier, p, 8);
L
Linus Torvalds 已提交
4564
	return 0;
B
Benny Halevy 已提交
4565 4566 4567
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
L
Linus Torvalds 已提交
4568 4569 4570 4571 4572 4573 4574
}

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

B
Benny Halevy 已提交
4575 4576 4577 4578 4579 4580
#if defined(CONFIG_NFS_V4_1)
static int decode_exchange_id(struct xdr_stream *xdr,
			      struct nfs41_exchange_id_res *res)
{
	__be32 *p;
	uint32_t dummy;
4581
	char *dummy_str;
B
Benny Halevy 已提交
4582 4583 4584 4585 4586 4587 4588
	int status;
	struct nfs_client *clp = res->client;

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

B
Benny Halevy 已提交
4589 4590 4591
	p = xdr_inline_decode(xdr, 8);
	if (unlikely(!p))
		goto out_overflow;
4592
	xdr_decode_hyper(p, &clp->cl_ex_clid);
B
Benny Halevy 已提交
4593 4594 4595
	p = xdr_inline_decode(xdr, 12);
	if (unlikely(!p))
		goto out_overflow;
B
Benny Halevy 已提交
4596 4597
	clp->cl_seqid = be32_to_cpup(p++);
	clp->cl_exchange_flags = be32_to_cpup(p++);
B
Benny Halevy 已提交
4598 4599

	/* We ask for SP4_NONE */
4600
	dummy = be32_to_cpup(p);
B
Benny Halevy 已提交
4601 4602 4603 4604
	if (dummy != SP4_NONE)
		return -EIO;

	/* Throw away minor_id */
B
Benny Halevy 已提交
4605 4606 4607
	p = xdr_inline_decode(xdr, 8);
	if (unlikely(!p))
		goto out_overflow;
B
Benny Halevy 已提交
4608 4609

	/* Throw away Major id */
4610 4611 4612
	status = decode_opaque_inline(xdr, &dummy, &dummy_str);
	if (unlikely(status))
		return status;
B
Benny Halevy 已提交
4613 4614

	/* Throw away server_scope */
4615 4616 4617
	status = decode_opaque_inline(xdr, &dummy, &dummy_str);
	if (unlikely(status))
		return status;
B
Benny Halevy 已提交
4618 4619

	/* Throw away Implementation id array */
4620 4621 4622
	status = decode_opaque_inline(xdr, &dummy, &dummy_str);
	if (unlikely(status))
		return status;
B
Benny Halevy 已提交
4623 4624

	return 0;
B
Benny Halevy 已提交
4625 4626 4627
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
B
Benny Halevy 已提交
4628
}
A
Andy Adamson 已提交
4629 4630 4631 4632 4633 4634 4635

static int decode_chan_attrs(struct xdr_stream *xdr,
			     struct nfs4_channel_attrs *attrs)
{
	__be32 *p;
	u32 nr_attrs;

B
Benny Halevy 已提交
4636 4637 4638
	p = xdr_inline_decode(xdr, 28);
	if (unlikely(!p))
		goto out_overflow;
B
Benny Halevy 已提交
4639 4640 4641 4642 4643 4644
	attrs->headerpadsz = be32_to_cpup(p++);
	attrs->max_rqst_sz = be32_to_cpup(p++);
	attrs->max_resp_sz = be32_to_cpup(p++);
	attrs->max_resp_sz_cached = be32_to_cpup(p++);
	attrs->max_ops = be32_to_cpup(p++);
	attrs->max_reqs = be32_to_cpup(p++);
4645
	nr_attrs = be32_to_cpup(p);
A
Andy Adamson 已提交
4646 4647 4648 4649 4650
	if (unlikely(nr_attrs > 1)) {
		printk(KERN_WARNING "%s: Invalid rdma channel attrs count %u\n",
			__func__, nr_attrs);
		return -EINVAL;
	}
B
Benny Halevy 已提交
4651 4652 4653 4654 4655
	if (nr_attrs == 1) {
		p = xdr_inline_decode(xdr, 4); /* skip rdma_attrs */
		if (unlikely(!p))
			goto out_overflow;
	}
A
Andy Adamson 已提交
4656
	return 0;
B
Benny Halevy 已提交
4657 4658 4659
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
A
Andy Adamson 已提交
4660 4661
}

4662 4663 4664
static int decode_sessionid(struct xdr_stream *xdr, struct nfs4_sessionid *sid)
{
	return decode_opaque_fixed(xdr, sid->data, NFS4_MAX_SESSIONID_LEN);
A
Andy Adamson 已提交
4665 4666 4667 4668 4669 4670 4671 4672 4673 4674 4675
}

static int decode_create_session(struct xdr_stream *xdr,
				 struct nfs41_create_session_res *res)
{
	__be32 *p;
	int status;
	struct nfs_client *clp = res->client;
	struct nfs4_session *session = clp->cl_session;

	status = decode_op_hdr(xdr, OP_CREATE_SESSION);
4676 4677 4678
	if (!status)
		status = decode_sessionid(xdr, &session->sess_id);
	if (unlikely(status))
A
Andy Adamson 已提交
4679 4680 4681
		return status;

	/* seqid, flags */
B
Benny Halevy 已提交
4682 4683 4684
	p = xdr_inline_decode(xdr, 8);
	if (unlikely(!p))
		goto out_overflow;
B
Benny Halevy 已提交
4685
	clp->cl_seqid = be32_to_cpup(p++);
4686
	session->flags = be32_to_cpup(p);
A
Andy Adamson 已提交
4687 4688 4689 4690 4691 4692

	/* Channel attributes */
	status = decode_chan_attrs(xdr, &session->fc_attrs);
	if (!status)
		status = decode_chan_attrs(xdr, &session->bc_attrs);
	return status;
B
Benny Halevy 已提交
4693 4694 4695
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
A
Andy Adamson 已提交
4696
}
A
Andy Adamson 已提交
4697 4698 4699 4700 4701

static int decode_destroy_session(struct xdr_stream *xdr, void *dummy)
{
	return decode_op_hdr(xdr, OP_DESTROY_SESSION);
}
4702 4703 4704 4705 4706

static int decode_reclaim_complete(struct xdr_stream *xdr, void *dummy)
{
	return decode_op_hdr(xdr, OP_RECLAIM_COMPLETE);
}
B
Benny Halevy 已提交
4707 4708
#endif /* CONFIG_NFS_V4_1 */

4709 4710 4711 4712 4713
static int decode_sequence(struct xdr_stream *xdr,
			   struct nfs4_sequence_res *res,
			   struct rpc_rqst *rqstp)
{
#if defined(CONFIG_NFS_V4_1)
A
Andy Adamson 已提交
4714 4715 4716 4717 4718
	struct nfs4_sessionid id;
	u32 dummy;
	int status;
	__be32 *p;

4719 4720 4721
	if (!res->sr_session)
		return 0;

A
Andy Adamson 已提交
4722
	status = decode_op_hdr(xdr, OP_SEQUENCE);
4723 4724 4725
	if (!status)
		status = decode_sessionid(xdr, &id);
	if (unlikely(status))
A
Andy Adamson 已提交
4726
		goto out_err;
4727

A
Andy Adamson 已提交
4728 4729 4730 4731
	/*
	 * If the server returns different values for sessionID, slotID or
	 * sequence number, the server is looney tunes.
	 */
4732
	status = -EREMOTEIO;
A
Andy Adamson 已提交
4733 4734 4735 4736 4737 4738

	if (memcmp(id.data, res->sr_session->sess_id.data,
		   NFS4_MAX_SESSIONID_LEN)) {
		dprintk("%s Invalid session id\n", __func__);
		goto out_err;
	}
4739

B
Benny Halevy 已提交
4740 4741 4742
	p = xdr_inline_decode(xdr, 20);
	if (unlikely(!p))
		goto out_overflow;
4743

A
Andy Adamson 已提交
4744
	/* seqid */
B
Benny Halevy 已提交
4745
	dummy = be32_to_cpup(p++);
4746
	if (dummy != res->sr_slot->seq_nr) {
A
Andy Adamson 已提交
4747 4748 4749 4750
		dprintk("%s Invalid sequence number\n", __func__);
		goto out_err;
	}
	/* slot id */
B
Benny Halevy 已提交
4751
	dummy = be32_to_cpup(p++);
4752
	if (dummy != res->sr_slot - res->sr_session->fc_slot_table.slots) {
A
Andy Adamson 已提交
4753 4754 4755 4756
		dprintk("%s Invalid slot id\n", __func__);
		goto out_err;
	}
	/* highest slot id - currently not processed */
B
Benny Halevy 已提交
4757
	dummy = be32_to_cpup(p++);
A
Andy Adamson 已提交
4758
	/* target highest slot id - currently not processed */
B
Benny Halevy 已提交
4759
	dummy = be32_to_cpup(p++);
4760 4761
	/* result flags */
	res->sr_status_flags = be32_to_cpup(p);
A
Andy Adamson 已提交
4762 4763 4764 4765
	status = 0;
out_err:
	res->sr_status = status;
	return status;
B
Benny Halevy 已提交
4766 4767 4768 4769
out_overflow:
	print_overflow_msg(__func__, xdr);
	status = -EIO;
	goto out_err;
A
Andy Adamson 已提交
4770
#else  /* CONFIG_NFS_V4_1 */
4771
	return 0;
A
Andy Adamson 已提交
4772
#endif /* CONFIG_NFS_V4_1 */
4773 4774
}

4775 4776 4777 4778
/*
 * END OF "GENERIC" DECODE ROUTINES.
 */

L
Linus Torvalds 已提交
4779 4780 4781
/*
 * Decode OPEN_DOWNGRADE response
 */
A
Al Viro 已提交
4782
static int nfs4_xdr_dec_open_downgrade(struct rpc_rqst *rqstp, __be32 *p, struct nfs_closeres *res)
L
Linus Torvalds 已提交
4783
{
A
Andy Adamson 已提交
4784 4785 4786 4787 4788 4789
	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);
4790 4791 4792
	if (status)
		goto out;
	status = decode_sequence(&xdr, &res->seq_res, rqstp);
A
Andy Adamson 已提交
4793 4794 4795 4796 4797 4798
	if (status)
		goto out;
	status = decode_putfh(&xdr);
	if (status)
		goto out;
	status = decode_open_downgrade(&xdr, res);
4799 4800
	if (status != 0)
		goto out;
4801 4802
	decode_getfattr(&xdr, res->fattr, res->server,
			!RPC_IS_ASYNC(rqstp->rq_task));
L
Linus Torvalds 已提交
4803
out:
A
Andy Adamson 已提交
4804
	return status;
L
Linus Torvalds 已提交
4805 4806 4807 4808 4809
}

/*
 * Decode ACCESS response
 */
A
Al Viro 已提交
4810
static int nfs4_xdr_dec_access(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_accessres *res)
L
Linus Torvalds 已提交
4811 4812 4813 4814
{
	struct xdr_stream xdr;
	struct compound_hdr hdr;
	int status;
4815

L
Linus Torvalds 已提交
4816
	xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4817 4818 4819 4820 4821
	status = decode_compound_hdr(&xdr, &hdr);
	if (status)
		goto out;
	status = decode_sequence(&xdr, &res->seq_res, rqstp);
	if (status)
L
Linus Torvalds 已提交
4822
		goto out;
4823 4824 4825 4826 4827 4828
	status = decode_putfh(&xdr);
	if (status != 0)
		goto out;
	status = decode_access(&xdr, res);
	if (status != 0)
		goto out;
4829 4830
	decode_getfattr(&xdr, res->fattr, res->server,
			!RPC_IS_ASYNC(rqstp->rq_task));
L
Linus Torvalds 已提交
4831 4832 4833 4834 4835 4836 4837
out:
	return status;
}

/*
 * Decode LOOKUP response
 */
A
Al Viro 已提交
4838
static int nfs4_xdr_dec_lookup(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_lookup_res *res)
L
Linus Torvalds 已提交
4839 4840 4841 4842
{
	struct xdr_stream xdr;
	struct compound_hdr hdr;
	int status;
4843

L
Linus Torvalds 已提交
4844
	xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4845 4846 4847 4848 4849
	status = decode_compound_hdr(&xdr, &hdr);
	if (status)
		goto out;
	status = decode_sequence(&xdr, &res->seq_res, rqstp);
	if (status)
L
Linus Torvalds 已提交
4850 4851 4852 4853 4854 4855 4856
		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;
4857 4858
	status = decode_getfattr(&xdr, res->fattr, res->server
			,!RPC_IS_ASYNC(rqstp->rq_task));
L
Linus Torvalds 已提交
4859 4860 4861 4862 4863 4864 4865
out:
	return status;
}

/*
 * Decode LOOKUP_ROOT response
 */
A
Al Viro 已提交
4866
static int nfs4_xdr_dec_lookup_root(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_lookup_res *res)
L
Linus Torvalds 已提交
4867 4868 4869 4870
{
	struct xdr_stream xdr;
	struct compound_hdr hdr;
	int status;
4871

L
Linus Torvalds 已提交
4872
	xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4873 4874 4875 4876 4877
	status = decode_compound_hdr(&xdr, &hdr);
	if (status)
		goto out;
	status = decode_sequence(&xdr, &res->seq_res, rqstp);
	if (status)
L
Linus Torvalds 已提交
4878 4879 4880 4881
		goto out;
	if ((status = decode_putrootfh(&xdr)) != 0)
		goto out;
	if ((status = decode_getfh(&xdr, res->fh)) == 0)
4882 4883
		status = decode_getfattr(&xdr, res->fattr, res->server,
				!RPC_IS_ASYNC(rqstp->rq_task));
L
Linus Torvalds 已提交
4884 4885 4886 4887 4888 4889 4890
out:
	return status;
}

/*
 * Decode REMOVE response
 */
4891
static int nfs4_xdr_dec_remove(struct rpc_rqst *rqstp, __be32 *p, struct nfs_removeres *res)
L
Linus Torvalds 已提交
4892 4893 4894 4895
{
	struct xdr_stream xdr;
	struct compound_hdr hdr;
	int status;
4896

L
Linus Torvalds 已提交
4897
	xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4898 4899 4900 4901 4902
	status = decode_compound_hdr(&xdr, &hdr);
	if (status)
		goto out;
	status = decode_sequence(&xdr, &res->seq_res, rqstp);
	if (status)
L
Linus Torvalds 已提交
4903
		goto out;
4904 4905 4906 4907
	if ((status = decode_putfh(&xdr)) != 0)
		goto out;
	if ((status = decode_remove(&xdr, &res->cinfo)) != 0)
		goto out;
4908
	decode_getfattr(&xdr, res->dir_attr, res->server,
4909
			!RPC_IS_ASYNC(rqstp->rq_task));
L
Linus Torvalds 已提交
4910 4911 4912 4913 4914 4915 4916
out:
	return status;
}

/*
 * Decode RENAME response
 */
4917
static int nfs4_xdr_dec_rename(struct rpc_rqst *rqstp, __be32 *p, struct nfs_renameres *res)
L
Linus Torvalds 已提交
4918 4919 4920 4921
{
	struct xdr_stream xdr;
	struct compound_hdr hdr;
	int status;
4922

L
Linus Torvalds 已提交
4923
	xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4924 4925 4926 4927 4928
	status = decode_compound_hdr(&xdr, &hdr);
	if (status)
		goto out;
	status = decode_sequence(&xdr, &res->seq_res, rqstp);
	if (status)
L
Linus Torvalds 已提交
4929 4930 4931 4932 4933 4934 4935
		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;
4936 4937 4938
	if ((status = decode_rename(&xdr, &res->old_cinfo, &res->new_cinfo)) != 0)
		goto out;
	/* Current FH is target directory */
4939 4940
	if (decode_getfattr(&xdr, res->new_fattr, res->server,
				!RPC_IS_ASYNC(rqstp->rq_task)) != 0)
4941 4942 4943
		goto out;
	if ((status = decode_restorefh(&xdr)) != 0)
		goto out;
4944 4945
	decode_getfattr(&xdr, res->old_fattr, res->server,
			!RPC_IS_ASYNC(rqstp->rq_task));
L
Linus Torvalds 已提交
4946 4947 4948 4949 4950 4951 4952
out:
	return status;
}

/*
 * Decode LINK response
 */
A
Al Viro 已提交
4953
static int nfs4_xdr_dec_link(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_link_res *res)
L
Linus Torvalds 已提交
4954 4955 4956 4957
{
	struct xdr_stream xdr;
	struct compound_hdr hdr;
	int status;
4958

L
Linus Torvalds 已提交
4959
	xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4960 4961 4962 4963 4964
	status = decode_compound_hdr(&xdr, &hdr);
	if (status)
		goto out;
	status = decode_sequence(&xdr, &res->seq_res, rqstp);
	if (status)
L
Linus Torvalds 已提交
4965 4966 4967 4968 4969 4970 4971
		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;
4972 4973 4974 4975 4976 4977
	if ((status = decode_link(&xdr, &res->cinfo)) != 0)
		goto out;
	/*
	 * Note order: OP_LINK leaves the directory as the current
	 *             filehandle.
	 */
4978 4979
	if (decode_getfattr(&xdr, res->dir_attr, res->server,
				!RPC_IS_ASYNC(rqstp->rq_task)) != 0)
4980 4981 4982
		goto out;
	if ((status = decode_restorefh(&xdr)) != 0)
		goto out;
4983 4984
	decode_getfattr(&xdr, res->fattr, res->server,
			!RPC_IS_ASYNC(rqstp->rq_task));
L
Linus Torvalds 已提交
4985 4986 4987 4988 4989 4990 4991
out:
	return status;
}

/*
 * Decode CREATE response
 */
A
Al Viro 已提交
4992
static int nfs4_xdr_dec_create(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_create_res *res)
L
Linus Torvalds 已提交
4993 4994 4995 4996
{
	struct xdr_stream xdr;
	struct compound_hdr hdr;
	int status;
4997

L
Linus Torvalds 已提交
4998
	xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4999 5000 5001 5002 5003
	status = decode_compound_hdr(&xdr, &hdr);
	if (status)
		goto out;
	status = decode_sequence(&xdr, &res->seq_res, rqstp);
	if (status)
L
Linus Torvalds 已提交
5004 5005 5006
		goto out;
	if ((status = decode_putfh(&xdr)) != 0)
		goto out;
5007 5008
	if ((status = decode_savefh(&xdr)) != 0)
		goto out;
L
Linus Torvalds 已提交
5009 5010 5011 5012
	if ((status = decode_create(&xdr,&res->dir_cinfo)) != 0)
		goto out;
	if ((status = decode_getfh(&xdr, res->fh)) != 0)
		goto out;
5013 5014
	if (decode_getfattr(&xdr, res->fattr, res->server,
				!RPC_IS_ASYNC(rqstp->rq_task)) != 0)
5015 5016 5017
		goto out;
	if ((status = decode_restorefh(&xdr)) != 0)
		goto out;
5018 5019
	decode_getfattr(&xdr, res->dir_fattr, res->server,
			!RPC_IS_ASYNC(rqstp->rq_task));
L
Linus Torvalds 已提交
5020 5021 5022 5023 5024 5025 5026
out:
	return status;
}

/*
 * Decode SYMLINK response
 */
A
Al Viro 已提交
5027
static int nfs4_xdr_dec_symlink(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_create_res *res)
L
Linus Torvalds 已提交
5028 5029 5030 5031 5032 5033 5034
{
	return nfs4_xdr_dec_create(rqstp, p, res);
}

/*
 * Decode GETATTR response
 */
A
Al Viro 已提交
5035
static int nfs4_xdr_dec_getattr(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_getattr_res *res)
L
Linus Torvalds 已提交
5036 5037 5038 5039
{
	struct xdr_stream xdr;
	struct compound_hdr hdr;
	int status;
5040

L
Linus Torvalds 已提交
5041 5042
	xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
	status = decode_compound_hdr(&xdr, &hdr);
5043 5044 5045
	if (status)
		goto out;
	status = decode_sequence(&xdr, &res->seq_res, rqstp);
L
Linus Torvalds 已提交
5046 5047 5048 5049 5050
	if (status)
		goto out;
	status = decode_putfh(&xdr);
	if (status)
		goto out;
5051 5052
	status = decode_getfattr(&xdr, res->fattr, res->server,
			!RPC_IS_ASYNC(rqstp->rq_task));
L
Linus Torvalds 已提交
5053 5054 5055 5056
out:
	return status;
}

5057 5058 5059 5060
/*
 * Encode an SETACL request
 */
static int
A
Al Viro 已提交
5061
nfs4_xdr_enc_setacl(struct rpc_rqst *req, __be32 *p, struct nfs_setaclargs *args)
5062
{
A
Andy Adamson 已提交
5063 5064
	struct xdr_stream xdr;
	struct compound_hdr hdr = {
5065
		.minorversion = nfs4_xdr_minorversion(&args->seq_args),
A
Andy Adamson 已提交
5066 5067 5068 5069
	};
	int status;

	xdr_init_encode(&xdr, &req->rq_snd_buf, p);
5070
	encode_compound_hdr(&xdr, req, &hdr);
5071
	encode_sequence(&xdr, &args->seq_args, &hdr);
5072
	encode_putfh(&xdr, args->fh, &hdr);
5073 5074
	status = encode_setacl(&xdr, args, &hdr);
	encode_nops(&hdr);
A
Andy Adamson 已提交
5075
	return status;
5076
}
A
Andy Adamson 已提交
5077

5078 5079 5080 5081
/*
 * Decode SETACL response
 */
static int
B
Benny Halevy 已提交
5082 5083
nfs4_xdr_dec_setacl(struct rpc_rqst *rqstp, __be32 *p,
		    struct nfs_setaclres *res)
5084 5085 5086 5087 5088 5089 5090
{
	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);
5091 5092 5093
	if (status)
		goto out;
	status = decode_sequence(&xdr, &res->seq_res, rqstp);
5094 5095 5096 5097 5098
	if (status)
		goto out;
	status = decode_putfh(&xdr);
	if (status)
		goto out;
5099
	status = decode_setattr(&xdr);
5100 5101 5102
out:
	return status;
}
L
Linus Torvalds 已提交
5103

5104 5105 5106 5107
/*
 * Decode GETACL response
 */
static int
B
Benny Halevy 已提交
5108 5109
nfs4_xdr_dec_getacl(struct rpc_rqst *rqstp, __be32 *p,
		    struct nfs_getaclres *res)
5110 5111 5112 5113 5114 5115 5116
{
	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);
5117 5118 5119
	if (status)
		goto out;
	status = decode_sequence(&xdr, &res->seq_res, rqstp);
5120 5121 5122 5123 5124
	if (status)
		goto out;
	status = decode_putfh(&xdr);
	if (status)
		goto out;
B
Benny Halevy 已提交
5125
	status = decode_getacl(&xdr, rqstp, &res->acl_len);
5126 5127 5128 5129 5130

out:
	return status;
}

L
Linus Torvalds 已提交
5131 5132 5133
/*
 * Decode CLOSE response
 */
A
Al Viro 已提交
5134
static int nfs4_xdr_dec_close(struct rpc_rqst *rqstp, __be32 *p, struct nfs_closeres *res)
L
Linus Torvalds 已提交
5135
{
A
Andy Adamson 已提交
5136 5137 5138 5139 5140 5141
	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);
5142 5143 5144
	if (status)
		goto out;
	status = decode_sequence(&xdr, &res->seq_res, rqstp);
A
Andy Adamson 已提交
5145 5146 5147 5148 5149 5150
	if (status)
		goto out;
	status = decode_putfh(&xdr);
	if (status)
		goto out;
	status = decode_close(&xdr, res);
5151 5152 5153 5154 5155 5156 5157 5158
	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.
	 */
5159 5160
	decode_getfattr(&xdr, res->fattr, res->server,
			!RPC_IS_ASYNC(rqstp->rq_task));
L
Linus Torvalds 已提交
5161
out:
A
Andy Adamson 已提交
5162
	return status;
L
Linus Torvalds 已提交
5163 5164 5165 5166 5167
}

/*
 * Decode OPEN response
 */
A
Al Viro 已提交
5168
static int nfs4_xdr_dec_open(struct rpc_rqst *rqstp, __be32 *p, struct nfs_openres *res)
L
Linus Torvalds 已提交
5169
{
A
Andy Adamson 已提交
5170 5171 5172 5173 5174 5175
	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);
5176 5177 5178
	if (status)
		goto out;
	status = decode_sequence(&xdr, &res->seq_res, rqstp);
A
Andy Adamson 已提交
5179 5180 5181 5182 5183 5184 5185 5186 5187
	if (status)
		goto out;
	status = decode_putfh(&xdr);
	if (status)
		goto out;
	status = decode_savefh(&xdr);
	if (status)
		goto out;
	status = decode_open(&xdr, res);
5188 5189
	if (status)
		goto out;
5190
	if (decode_getfh(&xdr, &res->fh) != 0)
L
Linus Torvalds 已提交
5191
		goto out;
5192 5193
	if (decode_getfattr(&xdr, res->f_attr, res->server,
				!RPC_IS_ASYNC(rqstp->rq_task)) != 0)
5194
		goto out;
5195
	if (decode_restorefh(&xdr) != 0)
5196
		goto out;
5197 5198
	decode_getfattr(&xdr, res->dir_attr, res->server,
			!RPC_IS_ASYNC(rqstp->rq_task));
L
Linus Torvalds 已提交
5199
out:
A
Andy Adamson 已提交
5200
	return status;
L
Linus Torvalds 已提交
5201 5202 5203 5204 5205
}

/*
 * Decode OPEN_CONFIRM response
 */
A
Al Viro 已提交
5206
static int nfs4_xdr_dec_open_confirm(struct rpc_rqst *rqstp, __be32 *p, struct nfs_open_confirmres *res)
L
Linus Torvalds 已提交
5207
{
A
Andy Adamson 已提交
5208 5209 5210 5211 5212 5213 5214 5215 5216 5217 5218 5219
	struct xdr_stream xdr;
	struct compound_hdr hdr;
	int status;

	xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
	status = decode_compound_hdr(&xdr, &hdr);
	if (status)
		goto out;
	status = decode_putfh(&xdr);
	if (status)
		goto out;
	status = decode_open_confirm(&xdr, res);
L
Linus Torvalds 已提交
5220
out:
A
Andy Adamson 已提交
5221
	return status;
L
Linus Torvalds 已提交
5222 5223 5224 5225 5226
}

/*
 * Decode OPEN response
 */
A
Al Viro 已提交
5227
static int nfs4_xdr_dec_open_noattr(struct rpc_rqst *rqstp, __be32 *p, struct nfs_openres *res)
L
Linus Torvalds 已提交
5228
{
A
Andy Adamson 已提交
5229 5230 5231 5232 5233 5234
	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);
5235 5236 5237
	if (status)
		goto out;
	status = decode_sequence(&xdr, &res->seq_res, rqstp);
A
Andy Adamson 已提交
5238 5239 5240 5241 5242 5243 5244 5245
	if (status)
		goto out;
	status = decode_putfh(&xdr);
	if (status)
		goto out;
	status = decode_open(&xdr, res);
	if (status)
		goto out;
5246 5247
	decode_getfattr(&xdr, res->f_attr, res->server,
			!RPC_IS_ASYNC(rqstp->rq_task));
L
Linus Torvalds 已提交
5248
out:
A
Andy Adamson 已提交
5249
	return status;
L
Linus Torvalds 已提交
5250 5251 5252 5253 5254
}

/*
 * Decode SETATTR response
 */
A
Al Viro 已提交
5255
static int nfs4_xdr_dec_setattr(struct rpc_rqst *rqstp, __be32 *p, struct nfs_setattrres *res)
L
Linus Torvalds 已提交
5256
{
A
Andy Adamson 已提交
5257 5258 5259 5260 5261 5262
	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);
5263 5264 5265
	if (status)
		goto out;
	status = decode_sequence(&xdr, &res->seq_res, rqstp);
A
Andy Adamson 已提交
5266 5267 5268 5269 5270
	if (status)
		goto out;
	status = decode_putfh(&xdr);
	if (status)
		goto out;
5271
	status = decode_setattr(&xdr);
A
Andy Adamson 已提交
5272 5273
	if (status)
		goto out;
5274 5275
	decode_getfattr(&xdr, res->fattr, res->server,
			!RPC_IS_ASYNC(rqstp->rq_task));
L
Linus Torvalds 已提交
5276
out:
A
Andy Adamson 已提交
5277
	return status;
L
Linus Torvalds 已提交
5278 5279 5280 5281 5282
}

/*
 * Decode LOCK response
 */
A
Al Viro 已提交
5283
static int nfs4_xdr_dec_lock(struct rpc_rqst *rqstp, __be32 *p, struct nfs_lock_res *res)
L
Linus Torvalds 已提交
5284 5285 5286 5287 5288 5289 5290
{
	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);
5291 5292 5293
	if (status)
		goto out;
	status = decode_sequence(&xdr, &res->seq_res, rqstp);
L
Linus Torvalds 已提交
5294 5295 5296 5297 5298 5299 5300 5301 5302 5303 5304 5305 5306
	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
5307
static int nfs4_xdr_dec_lockt(struct rpc_rqst *rqstp, __be32 *p, struct nfs_lockt_res *res)
L
Linus Torvalds 已提交
5308 5309 5310 5311 5312 5313 5314
{
	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);
5315 5316 5317
	if (status)
		goto out;
	status = decode_sequence(&xdr, &res->seq_res, rqstp);
L
Linus Torvalds 已提交
5318 5319 5320 5321 5322 5323 5324 5325 5326 5327 5328 5329 5330
	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
5331
static int nfs4_xdr_dec_locku(struct rpc_rqst *rqstp, __be32 *p, struct nfs_locku_res *res)
L
Linus Torvalds 已提交
5332 5333 5334 5335 5336 5337 5338
{
	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);
5339 5340 5341
	if (status)
		goto out;
	status = decode_sequence(&xdr, &res->seq_res, rqstp);
L
Linus Torvalds 已提交
5342 5343 5344 5345 5346 5347 5348 5349 5350 5351
	if (status)
		goto out;
	status = decode_putfh(&xdr);
	if (status)
		goto out;
	status = decode_locku(&xdr, res);
out:
	return status;
}

5352 5353 5354 5355 5356 5357 5358 5359 5360 5361 5362 5363 5364
static int nfs4_xdr_dec_release_lockowner(struct rpc_rqst *rqstp, __be32 *p, void *dummy)
{
	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_release_lockowner(&xdr);
	return status;
}

L
Linus Torvalds 已提交
5365 5366 5367
/*
 * Decode READLINK response
 */
B
Benny Halevy 已提交
5368 5369
static int nfs4_xdr_dec_readlink(struct rpc_rqst *rqstp, __be32 *p,
				 struct nfs4_readlink_res *res)
L
Linus Torvalds 已提交
5370 5371 5372 5373 5374 5375 5376
{
	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);
5377 5378 5379
	if (status)
		goto out;
	status = decode_sequence(&xdr, &res->seq_res, rqstp);
L
Linus Torvalds 已提交
5380 5381 5382 5383 5384 5385 5386 5387 5388 5389 5390 5391 5392
	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
5393
static int nfs4_xdr_dec_readdir(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_readdir_res *res)
L
Linus Torvalds 已提交
5394 5395 5396 5397 5398 5399 5400
{
	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);
5401 5402 5403
	if (status)
		goto out;
	status = decode_sequence(&xdr, &res->seq_res, rqstp);
L
Linus Torvalds 已提交
5404 5405 5406 5407 5408 5409 5410 5411 5412 5413 5414 5415 5416
	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
5417
static int nfs4_xdr_dec_read(struct rpc_rqst *rqstp, __be32 *p, struct nfs_readres *res)
L
Linus Torvalds 已提交
5418 5419 5420 5421 5422 5423 5424
{
	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);
5425 5426 5427
	if (status)
		goto out;
	status = decode_sequence(&xdr, &res->seq_res, rqstp);
L
Linus Torvalds 已提交
5428 5429 5430 5431 5432 5433 5434 5435 5436 5437 5438 5439 5440 5441 5442
	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
5443
static int nfs4_xdr_dec_write(struct rpc_rqst *rqstp, __be32 *p, struct nfs_writeres *res)
L
Linus Torvalds 已提交
5444 5445 5446 5447 5448 5449 5450
{
	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);
5451 5452 5453
	if (status)
		goto out;
	status = decode_sequence(&xdr, &res->seq_res, rqstp);
L
Linus Torvalds 已提交
5454 5455 5456 5457 5458 5459
	if (status)
		goto out;
	status = decode_putfh(&xdr);
	if (status)
		goto out;
	status = decode_write(&xdr, res);
5460 5461
	if (status)
		goto out;
5462 5463
	decode_getfattr(&xdr, res->fattr, res->server,
			!RPC_IS_ASYNC(rqstp->rq_task));
L
Linus Torvalds 已提交
5464 5465 5466 5467 5468 5469 5470 5471 5472
	if (!status)
		status = res->count;
out:
	return status;
}

/*
 * Decode COMMIT response
 */
A
Al Viro 已提交
5473
static int nfs4_xdr_dec_commit(struct rpc_rqst *rqstp, __be32 *p, struct nfs_writeres *res)
L
Linus Torvalds 已提交
5474 5475 5476 5477 5478 5479 5480
{
	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);
5481 5482 5483
	if (status)
		goto out;
	status = decode_sequence(&xdr, &res->seq_res, rqstp);
L
Linus Torvalds 已提交
5484 5485 5486 5487 5488 5489
	if (status)
		goto out;
	status = decode_putfh(&xdr);
	if (status)
		goto out;
	status = decode_commit(&xdr, res);
5490 5491
	if (status)
		goto out;
5492 5493
	decode_getfattr(&xdr, res->fattr, res->server,
			!RPC_IS_ASYNC(rqstp->rq_task));
L
Linus Torvalds 已提交
5494 5495 5496 5497 5498
out:
	return status;
}

/*
5499
 * Decode FSINFO response
L
Linus Torvalds 已提交
5500
 */
B
Benny Halevy 已提交
5501 5502
static int nfs4_xdr_dec_fsinfo(struct rpc_rqst *req, __be32 *p,
			       struct nfs4_fsinfo_res *res)
L
Linus Torvalds 已提交
5503 5504 5505 5506 5507 5508 5509
{
	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);
5510 5511
	if (!status)
		status = decode_sequence(&xdr, &res->seq_res, req);
L
Linus Torvalds 已提交
5512 5513 5514
	if (!status)
		status = decode_putfh(&xdr);
	if (!status)
B
Benny Halevy 已提交
5515
		status = decode_fsinfo(&xdr, res->fsinfo);
L
Linus Torvalds 已提交
5516 5517 5518 5519
	return status;
}

/*
5520
 * Decode PATHCONF response
L
Linus Torvalds 已提交
5521
 */
B
Benny Halevy 已提交
5522 5523
static int nfs4_xdr_dec_pathconf(struct rpc_rqst *req, __be32 *p,
				 struct nfs4_pathconf_res *res)
L
Linus Torvalds 已提交
5524 5525 5526 5527 5528 5529 5530
{
	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);
5531 5532
	if (!status)
		status = decode_sequence(&xdr, &res->seq_res, req);
L
Linus Torvalds 已提交
5533 5534 5535
	if (!status)
		status = decode_putfh(&xdr);
	if (!status)
B
Benny Halevy 已提交
5536
		status = decode_pathconf(&xdr, res->pathconf);
L
Linus Torvalds 已提交
5537 5538 5539 5540
	return status;
}

/*
5541
 * Decode STATFS response
L
Linus Torvalds 已提交
5542
 */
B
Benny Halevy 已提交
5543 5544
static int nfs4_xdr_dec_statfs(struct rpc_rqst *req, __be32 *p,
			       struct nfs4_statfs_res *res)
L
Linus Torvalds 已提交
5545 5546 5547 5548 5549 5550 5551
{
	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);
5552 5553
	if (!status)
		status = decode_sequence(&xdr, &res->seq_res, req);
L
Linus Torvalds 已提交
5554 5555 5556
	if (!status)
		status = decode_putfh(&xdr);
	if (!status)
B
Benny Halevy 已提交
5557
		status = decode_statfs(&xdr, res->fsstat);
L
Linus Torvalds 已提交
5558 5559 5560 5561
	return status;
}

/*
5562
 * Decode GETATTR_BITMAP response
L
Linus Torvalds 已提交
5563
 */
A
Al Viro 已提交
5564
static int nfs4_xdr_dec_server_caps(struct rpc_rqst *req, __be32 *p, struct nfs4_server_caps_res *res)
L
Linus Torvalds 已提交
5565 5566 5567 5568 5569 5570
{
	struct xdr_stream xdr;
	struct compound_hdr hdr;
	int status;

	xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
5571 5572 5573 5574 5575
	status = decode_compound_hdr(&xdr, &hdr);
	if (status)
		goto out;
	status = decode_sequence(&xdr, &res->seq_res, req);
	if (status)
L
Linus Torvalds 已提交
5576 5577 5578 5579 5580 5581 5582 5583 5584 5585 5586
		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
5587
static int nfs4_xdr_dec_renew(struct rpc_rqst *rqstp, __be32 *p, void *dummy)
L
Linus Torvalds 已提交
5588 5589 5590 5591 5592 5593 5594 5595 5596 5597 5598 5599 5600
{
	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;
}

/*
5601
 * Decode SETCLIENTID response
L
Linus Torvalds 已提交
5602
 */
A
Al Viro 已提交
5603
static int nfs4_xdr_dec_setclientid(struct rpc_rqst *req, __be32 *p,
5604
		struct nfs4_setclientid_res *res)
L
Linus Torvalds 已提交
5605 5606 5607 5608 5609 5610 5611 5612
{
	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)
5613
		status = decode_setclientid(&xdr, res);
L
Linus Torvalds 已提交
5614 5615 5616 5617
	return status;
}

/*
5618
 * Decode SETCLIENTID_CONFIRM response
L
Linus Torvalds 已提交
5619
 */
A
Al Viro 已提交
5620
static int nfs4_xdr_dec_setclientid_confirm(struct rpc_rqst *req, __be32 *p, struct nfs_fsinfo *fsinfo)
L
Linus Torvalds 已提交
5621 5622 5623 5624 5625 5626 5627 5628 5629 5630 5631 5632 5633 5634 5635 5636 5637
{
	struct xdr_stream xdr;
	struct compound_hdr hdr;
	int status;

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

/*
5638
 * Decode DELEGRETURN response
L
Linus Torvalds 已提交
5639
 */
A
Al Viro 已提交
5640
static int nfs4_xdr_dec_delegreturn(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_delegreturnres *res)
L
Linus Torvalds 已提交
5641 5642 5643 5644 5645 5646 5647
{
	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);
5648 5649 5650 5651
	if (status)
		goto out;
	status = decode_sequence(&xdr, &res->seq_res, rqstp);
	if (status)
5652 5653 5654 5655 5656
		goto out;
	status = decode_putfh(&xdr);
	if (status != 0)
		goto out;
	status = decode_delegreturn(&xdr);
5657 5658
	if (status != 0)
		goto out;
5659 5660
	decode_getfattr(&xdr, res->fattr, res->server,
			!RPC_IS_ASYNC(rqstp->rq_task));
5661
out:
L
Linus Torvalds 已提交
5662 5663 5664
	return status;
}

5665
/*
5666
 * Decode FS_LOCATIONS response
5667
 */
B
Benny Halevy 已提交
5668 5669
static int nfs4_xdr_dec_fs_locations(struct rpc_rqst *req, __be32 *p,
				     struct nfs4_fs_locations_res *res)
5670 5671 5672 5673 5674 5675 5676
{
	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);
5677 5678 5679 5680
	if (status)
		goto out;
	status = decode_sequence(&xdr, &res->seq_res, req);
	if (status)
5681 5682 5683 5684 5685 5686
		goto out;
	if ((status = decode_putfh(&xdr)) != 0)
		goto out;
	if ((status = decode_lookup(&xdr)) != 0)
		goto out;
	xdr_enter_page(&xdr, PAGE_SIZE);
B
Benny Halevy 已提交
5687
	status = decode_getfattr(&xdr, &res->fs_locations->fattr,
5688 5689
				 res->fs_locations->server,
				 !RPC_IS_ASYNC(req->rq_task));
5690 5691 5692 5693
out:
	return status;
}

B
Benny Halevy 已提交
5694 5695
#if defined(CONFIG_NFS_V4_1)
/*
5696
 * Decode EXCHANGE_ID response
B
Benny Halevy 已提交
5697 5698 5699 5700 5701 5702 5703 5704 5705 5706 5707 5708 5709 5710
 */
static int nfs4_xdr_dec_exchange_id(struct rpc_rqst *rqstp, uint32_t *p,
				    void *res)
{
	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_exchange_id(&xdr, res);
	return status;
}
A
Andy Adamson 已提交
5711

A
Andy Adamson 已提交
5712
/*
5713
 * Decode CREATE_SESSION response
A
Andy Adamson 已提交
5714 5715 5716 5717 5718 5719 5720 5721 5722 5723 5724 5725 5726 5727 5728
 */
static int nfs4_xdr_dec_create_session(struct rpc_rqst *rqstp, uint32_t *p,
				       struct nfs41_create_session_res *res)
{
	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_create_session(&xdr, res);
	return status;
}

A
Andy Adamson 已提交
5729
/*
5730
 * Decode DESTROY_SESSION response
A
Andy Adamson 已提交
5731 5732 5733 5734 5735 5736 5737 5738 5739 5740 5741 5742 5743 5744 5745
 */
static int nfs4_xdr_dec_destroy_session(struct rpc_rqst *rqstp, uint32_t *p,
					void *dummy)
{
	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_destroy_session(&xdr, dummy);
	return status;
}

A
Andy Adamson 已提交
5746
/*
5747
 * Decode SEQUENCE response
A
Andy Adamson 已提交
5748 5749 5750 5751 5752 5753 5754 5755 5756 5757 5758 5759 5760 5761 5762
 */
static int nfs4_xdr_dec_sequence(struct rpc_rqst *rqstp, uint32_t *p,
				 struct nfs4_sequence_res *res)
{
	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_sequence(&xdr, res, rqstp);
	return status;
}

A
Andy Adamson 已提交
5763
/*
5764
 * Decode GET_LEASE_TIME response
A
Andy Adamson 已提交
5765 5766 5767 5768 5769 5770 5771 5772 5773 5774 5775 5776 5777 5778 5779 5780 5781 5782
 */
static int nfs4_xdr_dec_get_lease_time(struct rpc_rqst *rqstp, uint32_t *p,
				       struct nfs4_get_lease_time_res *res)
{
	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_sequence(&xdr, &res->lr_seq_res, rqstp);
	if (!status)
		status = decode_putrootfh(&xdr);
	if (!status)
		status = decode_fsinfo(&xdr, res->lr_fsinfo);
	return status;
}
5783 5784 5785 5786 5787 5788 5789 5790 5791 5792 5793 5794 5795 5796 5797 5798 5799 5800 5801

/*
 * Decode RECLAIM_COMPLETE response
 */
static int nfs4_xdr_dec_reclaim_complete(struct rpc_rqst *rqstp, uint32_t *p,
					 struct nfs41_reclaim_complete_res *res)
{
	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_sequence(&xdr, &res->seq_res, rqstp);
	if (!status)
		status = decode_reclaim_complete(&xdr, (void *)NULL);
	return status;
}
B
Benny Halevy 已提交
5802 5803
#endif /* CONFIG_NFS_V4_1 */

B
Bryan Schumaker 已提交
5804 5805
__be32 *nfs4_decode_dirent(struct xdr_stream *xdr, struct nfs_entry *entry,
			   struct nfs_server *server, int plus)
L
Linus Torvalds 已提交
5806 5807 5808
{
	uint32_t bitmap[2] = {0};
	uint32_t len;
5809 5810 5811 5812 5813 5814 5815 5816
	__be32 *p = xdr_inline_decode(xdr, 4);
	if (unlikely(!p))
		goto out_overflow;
	if (!ntohl(*p++)) {
		p = xdr_inline_decode(xdr, 4);
		if (unlikely(!p))
			goto out_overflow;
		if (!ntohl(*p++))
L
Linus Torvalds 已提交
5817 5818 5819 5820 5821
			return ERR_PTR(-EAGAIN);
		entry->eof = 1;
		return ERR_PTR(-EBADCOOKIE);
	}

5822 5823 5824
	p = xdr_inline_decode(xdr, 12);
	if (unlikely(!p))
		goto out_overflow;
L
Linus Torvalds 已提交
5825 5826 5827
	entry->prev_cookie = entry->cookie;
	p = xdr_decode_hyper(p, &entry->cookie);
	entry->len = ntohl(*p++);
5828

5829
	p = xdr_inline_decode(xdr, entry->len);
5830 5831
	if (unlikely(!p))
		goto out_overflow;
L
Linus Torvalds 已提交
5832 5833 5834 5835 5836 5837 5838 5839
	entry->name = (const char *) p;

	/*
	 * In case the server doesn't return an inode number,
	 * we fake one here.  (We don't use inode number 0,
	 * since glibc seems to choke on it...)
	 */
	entry->ino = 1;
5840
	entry->fattr->valid = 0;
L
Linus Torvalds 已提交
5841

5842 5843 5844 5845 5846 5847 5848 5849 5850 5851 5852 5853
	if (decode_attr_bitmap(xdr, bitmap) < 0)
		goto out_overflow;

	if (decode_attr_length(xdr, &len, &p) < 0)
		goto out_overflow;

	if (decode_getfattr_attrs(xdr, bitmap, entry->fattr, entry->fh, server, 1) < 0)
		goto out_overflow;
	if (entry->fattr->valid & NFS_ATTR_FATTR_FILEID)
		entry->ino = entry->fattr->fileid;

	if (verify_attr_len(xdr, p, len) < 0)
5854
		goto out_overflow;
L
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5855

5856 5857 5858 5859 5860 5861
	p = xdr_inline_peek(xdr, 8);
	if (p != NULL)
		entry->eof = !p[0] && p[1];
	else
		entry->eof = 0;

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	return p;
5863 5864 5865 5866

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

/*
 * 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		},
5878 5879 5880 5881 5882 5883 5884 5885 5886 5887 5888 5889 5890 5891 5892 5893 5894 5895 5896 5897 5898 5899 5900 5901
	{ NFS4ERR_PERM,		-EPERM		},
	{ NFS4ERR_NOENT,	-ENOENT		},
	{ NFS4ERR_IO,		-errno_NFSERR_IO},
	{ NFS4ERR_NXIO,		-ENXIO		},
	{ NFS4ERR_ACCESS,	-EACCES		},
	{ NFS4ERR_EXIST,	-EEXIST		},
	{ NFS4ERR_XDEV,		-EXDEV		},
	{ NFS4ERR_NOTDIR,	-ENOTDIR	},
	{ NFS4ERR_ISDIR,	-EISDIR		},
	{ NFS4ERR_INVAL,	-EINVAL		},
	{ NFS4ERR_FBIG,		-EFBIG		},
	{ NFS4ERR_NOSPC,	-ENOSPC		},
	{ NFS4ERR_ROFS,		-EROFS		},
	{ NFS4ERR_MLINK,	-EMLINK		},
	{ NFS4ERR_NAMETOOLONG,	-ENAMETOOLONG	},
	{ NFS4ERR_NOTEMPTY,	-ENOTEMPTY	},
	{ NFS4ERR_DQUOT,	-EDQUOT		},
	{ NFS4ERR_STALE,	-ESTALE		},
	{ NFS4ERR_BADHANDLE,	-EBADHANDLE	},
	{ NFS4ERR_BADOWNER,	-EINVAL		},
	{ NFS4ERR_BADNAME,	-EINVAL		},
	{ NFS4ERR_BAD_COOKIE,	-EBADCOOKIE	},
	{ NFS4ERR_NOTSUPP,	-ENOTSUPP	},
	{ NFS4ERR_TOOSMALL,	-ETOOSMALL	},
5902
	{ NFS4ERR_SERVERFAULT,	-EREMOTEIO	},
5903 5904 5905 5906 5907 5908
	{ NFS4ERR_BADTYPE,	-EBADTYPE	},
	{ NFS4ERR_LOCKED,	-EAGAIN		},
	{ NFS4ERR_SYMLINK,	-ELOOP		},
	{ NFS4ERR_OP_ILLEGAL,	-EOPNOTSUPP	},
	{ NFS4ERR_DEADLOCK,	-EDEADLK	},
	{ NFS4ERR_WRONGSEC,	-EPERM		}, /* FIXME: this needs
L
Linus Torvalds 已提交
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						    * to be handled by a
						    * middle-layer.
						    */
5912
	{ -1,			-EIO		}
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5913 5914 5915 5916 5917 5918 5919
};

/*
 * Convert an NFS error code to a local one.
 * This one is used jointly by NFSv2 and NFSv3.
 */
static int
5920
nfs4_stat_to_errno(int stat)
L
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{
	int i;
	for (i = 0; nfs_errtbl[i].stat != -1; i++) {
		if (nfs_errtbl[i].stat == stat)
			return nfs_errtbl[i].errno;
	}
	if (stat <= 10000 || stat > 10100) {
		/* The server is looney tunes. */
5929
		return -EREMOTEIO;
L
Linus Torvalds 已提交
5930 5931 5932 5933 5934 5935
	}
	/* 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.
	 */
5936
	return -stat;
L
Linus Torvalds 已提交
5937 5938 5939 5940 5941 5942 5943
}

#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,		\
5944 5945
	.p_arglen = NFS4_##argtype##_sz,			\
	.p_replen = NFS4_##restype##_sz,			\
5946 5947
	.p_statidx = NFSPROC4_CLNT_##proc,			\
	.p_name   = #proc,					\
A
Andy Adamson 已提交
5948
}
L
Linus Torvalds 已提交
5949 5950 5951 5952 5953 5954 5955 5956 5957 5958 5959 5960 5961 5962 5963 5964 5965 5966 5967 5968 5969 5970 5971 5972 5973 5974 5975 5976 5977 5978 5979 5980 5981

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),
5982
  PROC(GETACL,		enc_getacl,	dec_getacl),
5983
  PROC(SETACL,		enc_setacl,	dec_setacl),
5984
  PROC(FS_LOCATIONS,	enc_fs_locations, dec_fs_locations),
5985
  PROC(RELEASE_LOCKOWNER, enc_release_lockowner, dec_release_lockowner),
B
Benny Halevy 已提交
5986 5987
#if defined(CONFIG_NFS_V4_1)
  PROC(EXCHANGE_ID,	enc_exchange_id,	dec_exchange_id),
A
Andy Adamson 已提交
5988
  PROC(CREATE_SESSION,	enc_create_session,	dec_create_session),
A
Andy Adamson 已提交
5989
  PROC(DESTROY_SESSION,	enc_destroy_session,	dec_destroy_session),
A
Andy Adamson 已提交
5990
  PROC(SEQUENCE,	enc_sequence,	dec_sequence),
A
Andy Adamson 已提交
5991
  PROC(GET_LEASE_TIME,	enc_get_lease_time,	dec_get_lease_time),
5992
  PROC(RECLAIM_COMPLETE, enc_reclaim_complete,  dec_reclaim_complete),
B
Benny Halevy 已提交
5993
#endif /* CONFIG_NFS_V4_1 */
L
Linus Torvalds 已提交
5994 5995 5996 5997
};

struct rpc_version		nfs_version4 = {
	.number			= 4,
5998
	.nrprocs		= ARRAY_SIZE(nfs4_procedures),
L
Linus Torvalds 已提交
5999 6000 6001 6002 6003 6004 6005 6006
	.procs			= nfs4_procedures
};

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