nfs4xdr.c 165.0 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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#include "pnfs.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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#define encode_getdeviceinfo_maxsz (op_encode_hdr_maxsz + 4 + \
				XDR_QUADLEN(NFS4_DEVICEID4_SIZE))
#define decode_getdeviceinfo_maxsz (op_decode_hdr_maxsz + \
				1 /* layout type */ + \
				1 /* opaque devaddr4 length */ + \
				  /* devaddr4 payload is read into page */ \
				1 /* notification bitmap length */ + \
				1 /* notification bitmap */)
#define encode_layoutget_maxsz	(op_encode_hdr_maxsz + 10 + \
				encode_stateid_maxsz)
#define decode_layoutget_maxsz	(op_decode_hdr_maxsz + 8 + \
				decode_stateid_maxsz + \
				XDR_QUADLEN(PNFS_LAYOUT_MAXSIZE))
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#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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#define NFS4_enc_getdeviceinfo_sz (compound_encode_hdr_maxsz +    \
				encode_sequence_maxsz +\
				encode_getdeviceinfo_maxsz)
#define NFS4_dec_getdeviceinfo_sz (compound_decode_hdr_maxsz +    \
				decode_sequence_maxsz + \
				decode_getdeviceinfo_maxsz)
#define NFS4_enc_layoutget_sz	(compound_encode_hdr_maxsz + \
				encode_sequence_maxsz + \
				encode_putfh_maxsz +        \
				encode_layoutget_maxsz)
#define NFS4_dec_layoutget_sz	(compound_decode_hdr_maxsz + \
				decode_sequence_maxsz + \
				decode_putfh_maxsz +        \
				decode_layoutget_maxsz)
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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);
798 799
	p = reserve_space(xdr, 4 + hdr->taglen + 8);
	p = xdr_encode_opaque(p, hdr->tag, hdr->taglen);
B
Benny Halevy 已提交
800
	*p++ = cpu_to_be32(hdr->minorversion);
801
	hdr->nops_p = p;
802
	*p = cpu_to_be32(hdr->nops);
803 804 805 806
}

static void encode_nops(struct compound_hdr *hdr)
{
A
Andy Adamson 已提交
807
	BUG_ON(hdr->nops > NFS4_MAX_OPS);
808
	*hdr->nops_p = htonl(hdr->nops);
L
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}

static void encode_nfs4_verifier(struct xdr_stream *xdr, const nfs4_verifier *verf)
{
A
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	__be32 *p;
L
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814 815 816 817 818 819

	p = xdr_reserve_space(xdr, NFS4_VERIFIER_SIZE);
	BUG_ON(p == NULL);
	xdr_encode_opaque_fixed(p, verf->data, NFS4_VERIFIER_SIZE);
}

820
static void encode_attrs(struct xdr_stream *xdr, const struct iattr *iap, const struct nfs_server *server)
L
Linus Torvalds 已提交
821 822 823 824 825
{
	char owner_name[IDMAP_NAMESZ];
	char owner_group[IDMAP_NAMESZ];
	int owner_namelen = 0;
	int owner_grouplen = 0;
A
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	__be32 *p;
	__be32 *q;
L
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828 829 830 831 832 833 834 835 836
	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
837
	 *            such as owner/group.
L
Linus Torvalds 已提交
838 839 840 841 842 843 844 845 846
	 */
	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
847
		owner_namelen = nfs_map_uid_to_name(server->nfs_client, iap->ia_uid, owner_name, IDMAP_NAMESZ);
L
Linus Torvalds 已提交
848
		if (owner_namelen < 0) {
849 850
			dprintk("nfs: couldn't resolve uid %d to string\n",
					iap->ia_uid);
L
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			/* XXX */
			strcpy(owner_name, "nobody");
			owner_namelen = sizeof("nobody") - 1;
			/* goto out; */
		}
		len += 4 + (XDR_QUADLEN(owner_namelen) << 2);
	}
	if (iap->ia_valid & ATTR_GID) {
B
Bryan Schumaker 已提交
859
		owner_grouplen = nfs_map_gid_to_group(server->nfs_client, iap->ia_gid, owner_group, IDMAP_NAMESZ);
L
Linus Torvalds 已提交
860
		if (owner_grouplen < 0) {
861 862
			dprintk("nfs: couldn't resolve gid %d to string\n",
					iap->ia_gid);
L
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863 864 865 866 867 868 869 870 871 872 873 874 875 876
			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;
877
	p = reserve_space(xdr, len);
L
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	/*
	 * 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
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883
	*p++ = cpu_to_be32(2);
L
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884 885 886 887 888
	q = p;
	p += 3;

	if (iap->ia_valid & ATTR_SIZE) {
		bmval0 |= FATTR4_WORD0_SIZE;
B
Benny Halevy 已提交
889
		p = xdr_encode_hyper(p, iap->ia_size);
L
Linus Torvalds 已提交
890 891 892
	}
	if (iap->ia_valid & ATTR_MODE) {
		bmval1 |= FATTR4_WORD1_MODE;
B
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893
		*p++ = cpu_to_be32(iap->ia_mode & S_IALLUGO);
L
Linus Torvalds 已提交
894 895 896
	}
	if (iap->ia_valid & ATTR_UID) {
		bmval1 |= FATTR4_WORD1_OWNER;
897
		p = xdr_encode_opaque(p, owner_name, owner_namelen);
L
Linus Torvalds 已提交
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	}
	if (iap->ia_valid & ATTR_GID) {
		bmval1 |= FATTR4_WORD1_OWNER_GROUP;
901
		p = xdr_encode_opaque(p, owner_group, owner_grouplen);
L
Linus Torvalds 已提交
902 903 904
	}
	if (iap->ia_valid & ATTR_ATIME_SET) {
		bmval1 |= FATTR4_WORD1_TIME_ACCESS_SET;
B
Benny Halevy 已提交
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		*p++ = cpu_to_be32(NFS4_SET_TO_CLIENT_TIME);
		*p++ = cpu_to_be32(0);
907 908
		*p++ = cpu_to_be32(iap->ia_atime.tv_sec);
		*p++ = cpu_to_be32(iap->ia_atime.tv_nsec);
L
Linus Torvalds 已提交
909 910 911
	}
	else if (iap->ia_valid & ATTR_ATIME) {
		bmval1 |= FATTR4_WORD1_TIME_ACCESS_SET;
B
Benny Halevy 已提交
912
		*p++ = cpu_to_be32(NFS4_SET_TO_SERVER_TIME);
L
Linus Torvalds 已提交
913 914 915
	}
	if (iap->ia_valid & ATTR_MTIME_SET) {
		bmval1 |= FATTR4_WORD1_TIME_MODIFY_SET;
B
Benny Halevy 已提交
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		*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
923
		*p++ = cpu_to_be32(NFS4_SET_TO_SERVER_TIME);
L
Linus Torvalds 已提交
924
	}
925

L
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926 927 928 929
	/*
	 * Now we backfill the bitmap and the attribute buffer length.
	 */
	if (len != ((char *)p - (char *)q) + 4) {
930
		printk(KERN_ERR "nfs: Attr length error, %u != %Zu\n",
L
Linus Torvalds 已提交
931 932 933 934 935 936
				len, ((char *)p - (char *)q) + 4);
		BUG();
	}
	len = (char *)p - (char *)q - 12;
	*q++ = htonl(bmval0);
	*q++ = htonl(bmval1);
937
	*q = htonl(len);
L
Linus Torvalds 已提交
938 939 940 941

/* out: */
}

942
static void encode_access(struct xdr_stream *xdr, u32 access, struct compound_hdr *hdr)
L
Linus Torvalds 已提交
943
{
A
Al Viro 已提交
944
	__be32 *p;
L
Linus Torvalds 已提交
945

946
	p = reserve_space(xdr, 8);
B
Benny Halevy 已提交
947
	*p++ = cpu_to_be32(OP_ACCESS);
948
	*p = cpu_to_be32(access);
949
	hdr->nops++;
950
	hdr->replen += decode_access_maxsz;
L
Linus Torvalds 已提交
951 952
}

953
static void encode_close(struct xdr_stream *xdr, const struct nfs_closeargs *arg, struct compound_hdr *hdr)
L
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954
{
A
Al Viro 已提交
955
	__be32 *p;
L
Linus Torvalds 已提交
956

957
	p = reserve_space(xdr, 8+NFS4_STATEID_SIZE);
B
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958 959
	*p++ = cpu_to_be32(OP_CLOSE);
	*p++ = cpu_to_be32(arg->seqid->sequence->counter);
960
	xdr_encode_opaque_fixed(p, arg->stateid->data, NFS4_STATEID_SIZE);
961
	hdr->nops++;
962
	hdr->replen += decode_close_maxsz;
L
Linus Torvalds 已提交
963 964
}

965
static void encode_commit(struct xdr_stream *xdr, const struct nfs_writeargs *args, struct compound_hdr *hdr)
L
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966
{
A
Al Viro 已提交
967
	__be32 *p;
968

969
	p = reserve_space(xdr, 16);
B
Benny Halevy 已提交
970
	*p++ = cpu_to_be32(OP_COMMIT);
B
Benny Halevy 已提交
971
	p = xdr_encode_hyper(p, args->offset);
972
	*p = cpu_to_be32(args->count);
973
	hdr->nops++;
974
	hdr->replen += decode_commit_maxsz;
L
Linus Torvalds 已提交
975 976
}

977
static void encode_create(struct xdr_stream *xdr, const struct nfs4_create_arg *create, struct compound_hdr *hdr)
L
Linus Torvalds 已提交
978
{
A
Al Viro 已提交
979
	__be32 *p;
980

981
	p = reserve_space(xdr, 8);
B
Benny Halevy 已提交
982
	*p++ = cpu_to_be32(OP_CREATE);
983
	*p = cpu_to_be32(create->ftype);
L
Linus Torvalds 已提交
984 985 986

	switch (create->ftype) {
	case NF4LNK:
987
		p = reserve_space(xdr, 4);
988
		*p = cpu_to_be32(create->u.symlink.len);
989
		xdr_write_pages(xdr, create->u.symlink.pages, 0, create->u.symlink.len);
L
Linus Torvalds 已提交
990 991 992
		break;

	case NF4BLK: case NF4CHR:
993
		p = reserve_space(xdr, 8);
B
Benny Halevy 已提交
994
		*p++ = cpu_to_be32(create->u.device.specdata1);
995
		*p = cpu_to_be32(create->u.device.specdata2);
L
Linus Torvalds 已提交
996 997 998 999 1000 1001
		break;

	default:
		break;
	}

1002
	encode_string(xdr, create->name->len, create->name->name);
1003
	hdr->nops++;
1004
	hdr->replen += decode_create_maxsz;
L
Linus Torvalds 已提交
1005

1006
	encode_attrs(xdr, create->attrs, create->server);
L
Linus Torvalds 已提交
1007 1008
}

1009
static void encode_getattr_one(struct xdr_stream *xdr, uint32_t bitmap, struct compound_hdr *hdr)
L
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1010
{
A
Andy Adamson 已提交
1011
	__be32 *p;
L
Linus Torvalds 已提交
1012

1013
	p = reserve_space(xdr, 12);
B
Benny Halevy 已提交
1014 1015
	*p++ = cpu_to_be32(OP_GETATTR);
	*p++ = cpu_to_be32(1);
1016
	*p = cpu_to_be32(bitmap);
1017
	hdr->nops++;
1018
	hdr->replen += decode_getattr_maxsz;
L
Linus Torvalds 已提交
1019 1020
}

1021
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
1022
{
A
Andy Adamson 已提交
1023
	__be32 *p;
L
Linus Torvalds 已提交
1024

1025
	p = reserve_space(xdr, 16);
B
Benny Halevy 已提交
1026 1027 1028
	*p++ = cpu_to_be32(OP_GETATTR);
	*p++ = cpu_to_be32(2);
	*p++ = cpu_to_be32(bm0);
1029
	*p = cpu_to_be32(bm1);
1030
	hdr->nops++;
1031
	hdr->replen += decode_getattr_maxsz;
L
Linus Torvalds 已提交
1032 1033
}

1034
static void encode_getfattr(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
L
Linus Torvalds 已提交
1035
{
1036 1037
	encode_getattr_two(xdr, bitmask[0] & nfs4_fattr_bitmap[0],
			   bitmask[1] & nfs4_fattr_bitmap[1], hdr);
L
Linus Torvalds 已提交
1038 1039
}

1040
static void encode_fsinfo(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
L
Linus Torvalds 已提交
1041
{
1042 1043
	encode_getattr_two(xdr, bitmask[0] & nfs4_fsinfo_bitmap[0],
			   bitmask[1] & nfs4_fsinfo_bitmap[1], hdr);
L
Linus Torvalds 已提交
1044 1045
}

1046
static void encode_fs_locations(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
1047
{
1048 1049
	encode_getattr_two(xdr, bitmask[0] & nfs4_fs_locations_bitmap[0],
			   bitmask[1] & nfs4_fs_locations_bitmap[1], hdr);
1050 1051
}

1052
static void encode_getfh(struct xdr_stream *xdr, struct compound_hdr *hdr)
L
Linus Torvalds 已提交
1053
{
A
Al Viro 已提交
1054
	__be32 *p;
L
Linus Torvalds 已提交
1055

1056
	p = reserve_space(xdr, 4);
1057
	*p = cpu_to_be32(OP_GETFH);
1058
	hdr->nops++;
1059
	hdr->replen += decode_getfh_maxsz;
L
Linus Torvalds 已提交
1060 1061
}

1062
static void encode_link(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
L
Linus Torvalds 已提交
1063
{
A
Al Viro 已提交
1064
	__be32 *p;
L
Linus Torvalds 已提交
1065

1066
	p = reserve_space(xdr, 8 + name->len);
B
Benny Halevy 已提交
1067
	*p++ = cpu_to_be32(OP_LINK);
1068
	xdr_encode_opaque(p, name->name, name->len);
1069
	hdr->nops++;
1070
	hdr->replen += decode_link_maxsz;
L
Linus Torvalds 已提交
1071 1072
}

T
Trond Myklebust 已提交
1073 1074 1075 1076 1077 1078 1079 1080 1081 1082 1083 1084 1085 1086
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;
}

1087 1088 1089 1090 1091 1092 1093 1094 1095 1096 1097
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
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1098 1099 1100 1101
/*
 * opcode,type,reclaim,offset,length,new_lock_owner = 32
 * open_seqid,open_stateid,lock_seqid,lock_owner.clientid, lock_owner.id = 40
 */
1102
static void encode_lock(struct xdr_stream *xdr, const struct nfs_lock_args *args, struct compound_hdr *hdr)
L
Linus Torvalds 已提交
1103
{
A
Al Viro 已提交
1104
	__be32 *p;
L
Linus Torvalds 已提交
1105

1106
	p = reserve_space(xdr, 32);
B
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1107 1108 1109
	*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
1110 1111
	p = xdr_encode_hyper(p, args->fl->fl_start);
	p = xdr_encode_hyper(p, nfs4_lock_length(args->fl));
1112
	*p = cpu_to_be32(args->new_lock_owner);
T
Trond Myklebust 已提交
1113
	if (args->new_lock_owner){
1114
		p = reserve_space(xdr, 4+NFS4_STATEID_SIZE+4);
B
Benny Halevy 已提交
1115
		*p++ = cpu_to_be32(args->open_seqid->sequence->counter);
B
Benny Halevy 已提交
1116
		p = xdr_encode_opaque_fixed(p, args->open_stateid->data, NFS4_STATEID_SIZE);
B
Benny Halevy 已提交
1117
		*p++ = cpu_to_be32(args->lock_seqid->sequence->counter);
1118
		encode_lockowner(xdr, &args->lock_owner);
L
Linus Torvalds 已提交
1119 1120
	}
	else {
1121
		p = reserve_space(xdr, NFS4_STATEID_SIZE+4);
B
Benny Halevy 已提交
1122
		p = xdr_encode_opaque_fixed(p, args->lock_stateid->data, NFS4_STATEID_SIZE);
1123
		*p = cpu_to_be32(args->lock_seqid->sequence->counter);
L
Linus Torvalds 已提交
1124
	}
1125
	hdr->nops++;
1126
	hdr->replen += decode_lock_maxsz;
L
Linus Torvalds 已提交
1127 1128
}

1129
static void encode_lockt(struct xdr_stream *xdr, const struct nfs_lockt_args *args, struct compound_hdr *hdr)
L
Linus Torvalds 已提交
1130
{
A
Al Viro 已提交
1131
	__be32 *p;
L
Linus Torvalds 已提交
1132

1133
	p = reserve_space(xdr, 24);
B
Benny Halevy 已提交
1134 1135
	*p++ = cpu_to_be32(OP_LOCKT);
	*p++ = cpu_to_be32(nfs4_lock_type(args->fl, 0));
B
Benny Halevy 已提交
1136 1137
	p = xdr_encode_hyper(p, args->fl->fl_start);
	p = xdr_encode_hyper(p, nfs4_lock_length(args->fl));
1138
	encode_lockowner(xdr, &args->lock_owner);
1139
	hdr->nops++;
1140
	hdr->replen += decode_lockt_maxsz;
L
Linus Torvalds 已提交
1141 1142
}

1143
static void encode_locku(struct xdr_stream *xdr, const struct nfs_locku_args *args, struct compound_hdr *hdr)
L
Linus Torvalds 已提交
1144
{
A
Al Viro 已提交
1145
	__be32 *p;
L
Linus Torvalds 已提交
1146

1147
	p = reserve_space(xdr, 12+NFS4_STATEID_SIZE+16);
B
Benny Halevy 已提交
1148 1149 1150
	*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
1151
	p = xdr_encode_opaque_fixed(p, args->stateid->data, NFS4_STATEID_SIZE);
B
Benny Halevy 已提交
1152
	p = xdr_encode_hyper(p, args->fl->fl_start);
1153
	xdr_encode_hyper(p, nfs4_lock_length(args->fl));
1154
	hdr->nops++;
1155
	hdr->replen += decode_locku_maxsz;
L
Linus Torvalds 已提交
1156 1157
}

1158 1159 1160 1161 1162 1163 1164 1165 1166 1167 1168
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;
}

1169
static void encode_lookup(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
L
Linus Torvalds 已提交
1170 1171
{
	int len = name->len;
A
Al Viro 已提交
1172
	__be32 *p;
L
Linus Torvalds 已提交
1173

1174
	p = reserve_space(xdr, 8 + len);
B
Benny Halevy 已提交
1175
	*p++ = cpu_to_be32(OP_LOOKUP);
1176
	xdr_encode_opaque(p, name->name, len);
1177
	hdr->nops++;
1178
	hdr->replen += decode_lookup_maxsz;
L
Linus Torvalds 已提交
1179 1180
}

1181
static void encode_share_access(struct xdr_stream *xdr, fmode_t fmode)
L
Linus Torvalds 已提交
1182
{
A
Al Viro 已提交
1183
	__be32 *p;
L
Linus Torvalds 已提交
1184

1185
	p = reserve_space(xdr, 8);
1186
	switch (fmode & (FMODE_READ|FMODE_WRITE)) {
A
Andy Adamson 已提交
1187
	case FMODE_READ:
B
Benny Halevy 已提交
1188
		*p++ = cpu_to_be32(NFS4_SHARE_ACCESS_READ);
A
Andy Adamson 已提交
1189 1190
		break;
	case FMODE_WRITE:
B
Benny Halevy 已提交
1191
		*p++ = cpu_to_be32(NFS4_SHARE_ACCESS_WRITE);
A
Andy Adamson 已提交
1192 1193
		break;
	case FMODE_READ|FMODE_WRITE:
B
Benny Halevy 已提交
1194
		*p++ = cpu_to_be32(NFS4_SHARE_ACCESS_BOTH);
A
Andy Adamson 已提交
1195 1196
		break;
	default:
B
Benny Halevy 已提交
1197
		*p++ = cpu_to_be32(0);
L
Linus Torvalds 已提交
1198
	}
1199
	*p = cpu_to_be32(0);		/* for linux, share_deny = 0 always */
L
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1200 1201 1202 1203
}

static inline void encode_openhdr(struct xdr_stream *xdr, const struct nfs_openargs *arg)
{
A
Al Viro 已提交
1204
	__be32 *p;
L
Linus Torvalds 已提交
1205 1206 1207 1208
 /*
 * opcode 4, seqid 4, share_access 4, share_deny 4, clientid 8, ownerlen 4,
 * owner 4 = 32
 */
1209
	p = reserve_space(xdr, 8);
B
Benny Halevy 已提交
1210
	*p++ = cpu_to_be32(OP_OPEN);
1211
	*p = cpu_to_be32(arg->seqid->sequence->counter);
1212
	encode_share_access(xdr, arg->fmode);
1213
	p = reserve_space(xdr, 28);
B
Benny Halevy 已提交
1214
	p = xdr_encode_hyper(p, arg->clientid);
B
Benny Halevy 已提交
1215
	*p++ = cpu_to_be32(16);
B
Benny Halevy 已提交
1216
	p = xdr_encode_opaque_fixed(p, "open id:", 8);
1217
	xdr_encode_hyper(p, arg->id);
L
Linus Torvalds 已提交
1218 1219 1220 1221
}

static inline void encode_createmode(struct xdr_stream *xdr, const struct nfs_openargs *arg)
{
A
Al Viro 已提交
1222
	__be32 *p;
1223
	struct nfs_client *clp;
L
Linus Torvalds 已提交
1224

1225
	p = reserve_space(xdr, 4);
L
Linus Torvalds 已提交
1226
	switch(arg->open_flags & O_EXCL) {
A
Andy Adamson 已提交
1227
	case 0:
1228
		*p = cpu_to_be32(NFS4_CREATE_UNCHECKED);
A
Andy Adamson 已提交
1229 1230 1231
		encode_attrs(xdr, arg->u.attrs, arg->server);
		break;
	default:
1232
		clp = arg->server->nfs_client;
1233
		if (clp->cl_mvops->minor_version > 0) {
1234 1235 1236 1237 1238 1239 1240 1241 1242 1243 1244 1245 1246 1247 1248
			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);
		}
L
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1249 1250 1251 1252 1253
	}
}

static void encode_opentype(struct xdr_stream *xdr, const struct nfs_openargs *arg)
{
A
Al Viro 已提交
1254
	__be32 *p;
L
Linus Torvalds 已提交
1255

1256
	p = reserve_space(xdr, 4);
L
Linus Torvalds 已提交
1257
	switch (arg->open_flags & O_CREAT) {
A
Andy Adamson 已提交
1258
	case 0:
1259
		*p = cpu_to_be32(NFS4_OPEN_NOCREATE);
A
Andy Adamson 已提交
1260 1261 1262
		break;
	default:
		BUG_ON(arg->claim != NFS4_OPEN_CLAIM_NULL);
1263
		*p = cpu_to_be32(NFS4_OPEN_CREATE);
A
Andy Adamson 已提交
1264
		encode_createmode(xdr, arg);
L
Linus Torvalds 已提交
1265 1266 1267
	}
}

1268
static inline void encode_delegation_type(struct xdr_stream *xdr, fmode_t delegation_type)
L
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1269
{
A
Al Viro 已提交
1270
	__be32 *p;
L
Linus Torvalds 已提交
1271

1272
	p = reserve_space(xdr, 4);
L
Linus Torvalds 已提交
1273
	switch (delegation_type) {
A
Andy Adamson 已提交
1274
	case 0:
1275
		*p = cpu_to_be32(NFS4_OPEN_DELEGATE_NONE);
A
Andy Adamson 已提交
1276 1277
		break;
	case FMODE_READ:
1278
		*p = cpu_to_be32(NFS4_OPEN_DELEGATE_READ);
A
Andy Adamson 已提交
1279 1280
		break;
	case FMODE_WRITE|FMODE_READ:
1281
		*p = cpu_to_be32(NFS4_OPEN_DELEGATE_WRITE);
A
Andy Adamson 已提交
1282 1283 1284
		break;
	default:
		BUG();
L
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1285 1286 1287 1288 1289
	}
}

static inline void encode_claim_null(struct xdr_stream *xdr, const struct qstr *name)
{
A
Al Viro 已提交
1290
	__be32 *p;
L
Linus Torvalds 已提交
1291

1292
	p = reserve_space(xdr, 4);
1293
	*p = cpu_to_be32(NFS4_OPEN_CLAIM_NULL);
L
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1294 1295 1296
	encode_string(xdr, name->len, name->name);
}

1297
static inline void encode_claim_previous(struct xdr_stream *xdr, fmode_t type)
L
Linus Torvalds 已提交
1298
{
A
Al Viro 已提交
1299
	__be32 *p;
L
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1300

1301
	p = reserve_space(xdr, 4);
1302
	*p = cpu_to_be32(NFS4_OPEN_CLAIM_PREVIOUS);
L
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1303 1304 1305 1306 1307
	encode_delegation_type(xdr, type);
}

static inline void encode_claim_delegate_cur(struct xdr_stream *xdr, const struct qstr *name, const nfs4_stateid *stateid)
{
A
Al Viro 已提交
1308
	__be32 *p;
L
Linus Torvalds 已提交
1309

1310
	p = reserve_space(xdr, 4+NFS4_STATEID_SIZE);
B
Benny Halevy 已提交
1311
	*p++ = cpu_to_be32(NFS4_OPEN_CLAIM_DELEGATE_CUR);
1312
	xdr_encode_opaque_fixed(p, stateid->data, NFS4_STATEID_SIZE);
L
Linus Torvalds 已提交
1313 1314 1315
	encode_string(xdr, name->len, name->name);
}

1316
static void encode_open(struct xdr_stream *xdr, const struct nfs_openargs *arg, struct compound_hdr *hdr)
L
Linus Torvalds 已提交
1317 1318 1319 1320
{
	encode_openhdr(xdr, arg);
	encode_opentype(xdr, arg);
	switch (arg->claim) {
A
Andy Adamson 已提交
1321 1322 1323 1324 1325 1326 1327 1328 1329 1330 1331
	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
Linus Torvalds 已提交
1332
	}
1333
	hdr->nops++;
1334
	hdr->replen += decode_open_maxsz;
L
Linus Torvalds 已提交
1335 1336
}

1337
static void encode_open_confirm(struct xdr_stream *xdr, const struct nfs_open_confirmargs *arg, struct compound_hdr *hdr)
L
Linus Torvalds 已提交
1338
{
A
Al Viro 已提交
1339
	__be32 *p;
L
Linus Torvalds 已提交
1340

1341
	p = reserve_space(xdr, 4+NFS4_STATEID_SIZE+4);
B
Benny Halevy 已提交
1342
	*p++ = cpu_to_be32(OP_OPEN_CONFIRM);
B
Benny Halevy 已提交
1343
	p = xdr_encode_opaque_fixed(p, arg->stateid->data, NFS4_STATEID_SIZE);
1344
	*p = cpu_to_be32(arg->seqid->sequence->counter);
1345
	hdr->nops++;
1346
	hdr->replen += decode_open_confirm_maxsz;
L
Linus Torvalds 已提交
1347 1348
}

1349
static void encode_open_downgrade(struct xdr_stream *xdr, const struct nfs_closeargs *arg, struct compound_hdr *hdr)
L
Linus Torvalds 已提交
1350
{
A
Al Viro 已提交
1351
	__be32 *p;
L
Linus Torvalds 已提交
1352

1353
	p = reserve_space(xdr, 4+NFS4_STATEID_SIZE+4);
B
Benny Halevy 已提交
1354
	*p++ = cpu_to_be32(OP_OPEN_DOWNGRADE);
B
Benny Halevy 已提交
1355
	p = xdr_encode_opaque_fixed(p, arg->stateid->data, NFS4_STATEID_SIZE);
1356
	*p = cpu_to_be32(arg->seqid->sequence->counter);
1357
	encode_share_access(xdr, arg->fmode);
1358
	hdr->nops++;
1359
	hdr->replen += decode_open_downgrade_maxsz;
L
Linus Torvalds 已提交
1360 1361
}

1362
static void
1363
encode_putfh(struct xdr_stream *xdr, const struct nfs_fh *fh, struct compound_hdr *hdr)
L
Linus Torvalds 已提交
1364 1365
{
	int len = fh->size;
A
Al Viro 已提交
1366
	__be32 *p;
L
Linus Torvalds 已提交
1367

1368
	p = reserve_space(xdr, 8 + len);
B
Benny Halevy 已提交
1369
	*p++ = cpu_to_be32(OP_PUTFH);
1370
	xdr_encode_opaque(p, fh->data, len);
1371
	hdr->nops++;
1372
	hdr->replen += decode_putfh_maxsz;
L
Linus Torvalds 已提交
1373 1374
}

1375
static void encode_putrootfh(struct xdr_stream *xdr, struct compound_hdr *hdr)
L
Linus Torvalds 已提交
1376
{
A
Andy Adamson 已提交
1377
	__be32 *p;
1378

1379
	p = reserve_space(xdr, 4);
1380
	*p = cpu_to_be32(OP_PUTROOTFH);
1381
	hdr->nops++;
1382
	hdr->replen += decode_putrootfh_maxsz;
L
Linus Torvalds 已提交
1383 1384
}

1385
static void encode_stateid(struct xdr_stream *xdr, const struct nfs_open_context *ctx, const struct nfs_lock_context *l_ctx)
L
Linus Torvalds 已提交
1386 1387
{
	nfs4_stateid stateid;
A
Al Viro 已提交
1388
	__be32 *p;
L
Linus Torvalds 已提交
1389

1390
	p = reserve_space(xdr, NFS4_STATEID_SIZE);
L
Linus Torvalds 已提交
1391
	if (ctx->state != NULL) {
1392
		nfs4_copy_stateid(&stateid, ctx->state, l_ctx->lockowner, l_ctx->pid);
1393
		xdr_encode_opaque_fixed(p, stateid.data, NFS4_STATEID_SIZE);
L
Linus Torvalds 已提交
1394
	} else
1395
		xdr_encode_opaque_fixed(p, zero_stateid.data, NFS4_STATEID_SIZE);
L
Linus Torvalds 已提交
1396 1397
}

1398
static void encode_read(struct xdr_stream *xdr, const struct nfs_readargs *args, struct compound_hdr *hdr)
L
Linus Torvalds 已提交
1399
{
A
Al Viro 已提交
1400
	__be32 *p;
L
Linus Torvalds 已提交
1401

1402
	p = reserve_space(xdr, 4);
1403
	*p = cpu_to_be32(OP_READ);
L
Linus Torvalds 已提交
1404

1405
	encode_stateid(xdr, args->context, args->lock_context);
L
Linus Torvalds 已提交
1406

1407
	p = reserve_space(xdr, 12);
B
Benny Halevy 已提交
1408
	p = xdr_encode_hyper(p, args->offset);
1409
	*p = cpu_to_be32(args->count);
1410
	hdr->nops++;
1411
	hdr->replen += decode_read_maxsz;
L
Linus Torvalds 已提交
1412 1413
}

1414
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
1415
{
B
Bryan Schumaker 已提交
1416
	uint32_t attrs[2] = {0, 0};
1417
	uint32_t dircount = readdir->count >> 1;
A
Al Viro 已提交
1418
	__be32 *p;
L
Linus Torvalds 已提交
1419

B
Bryan Schumaker 已提交
1420 1421 1422 1423 1424 1425 1426
	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;
1427
		dircount >>= 1;
B
Bryan Schumaker 已提交
1428 1429 1430
	}
	attrs[0] |= FATTR4_WORD0_RDATTR_ERROR|FATTR4_WORD0_FILEID;
	attrs[1] |= FATTR4_WORD1_MOUNTED_ON_FILEID;
1431 1432 1433 1434 1435
	/* 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
1436

1437
	p = reserve_space(xdr, 12+NFS4_VERIFIER_SIZE+20);
B
Benny Halevy 已提交
1438
	*p++ = cpu_to_be32(OP_READDIR);
B
Benny Halevy 已提交
1439
	p = xdr_encode_hyper(p, readdir->cookie);
B
Benny Halevy 已提交
1440
	p = xdr_encode_opaque_fixed(p, readdir->verifier.data, NFS4_VERIFIER_SIZE);
1441
	*p++ = cpu_to_be32(dircount);
B
Benny Halevy 已提交
1442 1443
	*p++ = cpu_to_be32(readdir->count);
	*p++ = cpu_to_be32(2);
B
Bryan Schumaker 已提交
1444

B
Benny Halevy 已提交
1445
	*p++ = cpu_to_be32(attrs[0] & readdir->bitmask[0]);
1446
	*p = cpu_to_be32(attrs[1] & readdir->bitmask[1]);
1447
	hdr->nops++;
1448
	hdr->replen += decode_readdir_maxsz;
1449 1450
	dprintk("%s: cookie = %Lu, verifier = %08x:%08x, bitmap = %08x:%08x\n",
			__func__,
1451 1452 1453 1454 1455
			(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
Linus Torvalds 已提交
1456 1457
}

1458
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
1459
{
A
Al Viro 已提交
1460
	__be32 *p;
L
Linus Torvalds 已提交
1461

1462
	p = reserve_space(xdr, 4);
1463
	*p = cpu_to_be32(OP_READLINK);
1464
	hdr->nops++;
1465
	hdr->replen += decode_readlink_maxsz;
L
Linus Torvalds 已提交
1466 1467
}

1468
static void encode_remove(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
L
Linus Torvalds 已提交
1469
{
A
Al Viro 已提交
1470
	__be32 *p;
L
Linus Torvalds 已提交
1471

1472
	p = reserve_space(xdr, 8 + name->len);
B
Benny Halevy 已提交
1473
	*p++ = cpu_to_be32(OP_REMOVE);
1474
	xdr_encode_opaque(p, name->name, name->len);
1475
	hdr->nops++;
1476
	hdr->replen += decode_remove_maxsz;
L
Linus Torvalds 已提交
1477 1478
}

1479
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
1480
{
A
Al Viro 已提交
1481
	__be32 *p;
L
Linus Torvalds 已提交
1482

1483 1484 1485 1486
	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);
1487
	hdr->nops++;
1488
	hdr->replen += decode_rename_maxsz;
L
Linus Torvalds 已提交
1489 1490
}

1491
static void encode_renew(struct xdr_stream *xdr, const struct nfs_client *client_stateid, struct compound_hdr *hdr)
L
Linus Torvalds 已提交
1492
{
A
Al Viro 已提交
1493
	__be32 *p;
L
Linus Torvalds 已提交
1494

1495
	p = reserve_space(xdr, 12);
B
Benny Halevy 已提交
1496
	*p++ = cpu_to_be32(OP_RENEW);
1497
	xdr_encode_hyper(p, client_stateid->cl_clientid);
1498
	hdr->nops++;
1499
	hdr->replen += decode_renew_maxsz;
L
Linus Torvalds 已提交
1500 1501
}

1502
static void
1503
encode_restorefh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1504
{
A
Al Viro 已提交
1505
	__be32 *p;
1506

1507
	p = reserve_space(xdr, 4);
1508
	*p = cpu_to_be32(OP_RESTOREFH);
1509
	hdr->nops++;
1510
	hdr->replen += decode_restorefh_maxsz;
1511 1512
}

1513
static void
1514
encode_setacl(struct xdr_stream *xdr, struct nfs_setaclargs *arg, struct compound_hdr *hdr)
1515
{
A
Al Viro 已提交
1516
	__be32 *p;
1517

1518
	p = reserve_space(xdr, 4+NFS4_STATEID_SIZE);
B
Benny Halevy 已提交
1519
	*p++ = cpu_to_be32(OP_SETATTR);
1520
	xdr_encode_opaque_fixed(p, zero_stateid.data, NFS4_STATEID_SIZE);
1521
	p = reserve_space(xdr, 2*4);
B
Benny Halevy 已提交
1522
	*p++ = cpu_to_be32(1);
1523
	*p = cpu_to_be32(FATTR4_WORD0_ACL);
1524
	BUG_ON(arg->acl_len % 4);
1525
	p = reserve_space(xdr, 4);
1526
	*p = cpu_to_be32(arg->acl_len);
1527
	xdr_write_pages(xdr, arg->acl_pages, arg->acl_pgbase, arg->acl_len);
1528
	hdr->nops++;
1529
	hdr->replen += decode_setacl_maxsz;
1530 1531
}

1532
static void
1533
encode_savefh(struct xdr_stream *xdr, struct compound_hdr *hdr)
L
Linus Torvalds 已提交
1534
{
A
Al Viro 已提交
1535
	__be32 *p;
L
Linus Torvalds 已提交
1536

1537
	p = reserve_space(xdr, 4);
1538
	*p = cpu_to_be32(OP_SAVEFH);
1539
	hdr->nops++;
1540
	hdr->replen += decode_savefh_maxsz;
L
Linus Torvalds 已提交
1541 1542
}

1543
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
1544
{
A
Al Viro 已提交
1545
	__be32 *p;
1546

1547
	p = reserve_space(xdr, 4+NFS4_STATEID_SIZE);
B
Benny Halevy 已提交
1548
	*p++ = cpu_to_be32(OP_SETATTR);
1549
	xdr_encode_opaque_fixed(p, arg->stateid.data, NFS4_STATEID_SIZE);
1550
	hdr->nops++;
1551
	hdr->replen += decode_setattr_maxsz;
1552
	encode_attrs(xdr, arg->iap, server);
L
Linus Torvalds 已提交
1553 1554
}

1555
static void encode_setclientid(struct xdr_stream *xdr, const struct nfs4_setclientid *setclientid, struct compound_hdr *hdr)
L
Linus Torvalds 已提交
1556
{
A
Al Viro 已提交
1557
	__be32 *p;
L
Linus Torvalds 已提交
1558

1559
	p = reserve_space(xdr, 4 + NFS4_VERIFIER_SIZE);
B
Benny Halevy 已提交
1560
	*p++ = cpu_to_be32(OP_SETCLIENTID);
1561
	xdr_encode_opaque_fixed(p, setclientid->sc_verifier->data, NFS4_VERIFIER_SIZE);
L
Linus Torvalds 已提交
1562 1563

	encode_string(xdr, setclientid->sc_name_len, setclientid->sc_name);
1564
	p = reserve_space(xdr, 4);
1565
	*p = cpu_to_be32(setclientid->sc_prog);
L
Linus Torvalds 已提交
1566 1567
	encode_string(xdr, setclientid->sc_netid_len, setclientid->sc_netid);
	encode_string(xdr, setclientid->sc_uaddr_len, setclientid->sc_uaddr);
1568
	p = reserve_space(xdr, 4);
1569
	*p = cpu_to_be32(setclientid->sc_cb_ident);
1570
	hdr->nops++;
1571
	hdr->replen += decode_setclientid_maxsz;
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}

1574
static void encode_setclientid_confirm(struct xdr_stream *xdr, const struct nfs4_setclientid_res *arg, struct compound_hdr *hdr)
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{
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	__be32 *p;
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1577

1578
	p = reserve_space(xdr, 12 + NFS4_VERIFIER_SIZE);
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1579
	*p++ = cpu_to_be32(OP_SETCLIENTID_CONFIRM);
1580 1581
	p = xdr_encode_hyper(p, arg->clientid);
	xdr_encode_opaque_fixed(p, arg->confirm.data, NFS4_VERIFIER_SIZE);
1582
	hdr->nops++;
1583
	hdr->replen += decode_setclientid_confirm_maxsz;
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}

1586
static void encode_write(struct xdr_stream *xdr, const struct nfs_writeargs *args, struct compound_hdr *hdr)
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{
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	__be32 *p;
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1589

1590
	p = reserve_space(xdr, 4);
1591
	*p = cpu_to_be32(OP_WRITE);
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1593
	encode_stateid(xdr, args->context, args->lock_context);
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1594

1595
	p = reserve_space(xdr, 16);
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1596
	p = xdr_encode_hyper(p, args->offset);
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1597
	*p++ = cpu_to_be32(args->stable);
1598
	*p = cpu_to_be32(args->count);
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	xdr_write_pages(xdr, args->pages, args->pgbase, args->count);
1601
	hdr->nops++;
1602
	hdr->replen += decode_write_maxsz;
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}

1605
static void encode_delegreturn(struct xdr_stream *xdr, const nfs4_stateid *stateid, struct compound_hdr *hdr)
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{
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	__be32 *p;
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1608

1609
	p = reserve_space(xdr, 4+NFS4_STATEID_SIZE);
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	*p++ = cpu_to_be32(OP_DELEGRETURN);
1612
	xdr_encode_opaque_fixed(p, stateid->data, NFS4_STATEID_SIZE);
1613
	hdr->nops++;
1614
	hdr->replen += decode_delegreturn_maxsz;
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1615
}
1616

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#if defined(CONFIG_NFS_V4_1)
1618
/* NFSv4.1 operations */
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static void encode_exchange_id(struct xdr_stream *xdr,
			       struct nfs41_exchange_id_args *args,
			       struct compound_hdr *hdr)
{
	__be32 *p;

1625
	p = reserve_space(xdr, 4 + sizeof(args->verifier->data));
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	*p++ = cpu_to_be32(OP_EXCHANGE_ID);
1627
	xdr_encode_opaque_fixed(p, args->verifier->data, sizeof(args->verifier->data));
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	encode_string(xdr, args->id_len, args->id);

1631
	p = reserve_space(xdr, 12);
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	*p++ = cpu_to_be32(args->flags);
	*p++ = cpu_to_be32(0);	/* zero length state_protect4_a */
1634
	*p = cpu_to_be32(0);	/* zero length implementation id array */
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	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;
1647 1648 1649 1650 1651 1652 1653 1654
	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;
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1656 1657
	len = scnprintf(machine_name, sizeof(machine_name), "%s",
			clp->cl_ipaddr);
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1659
	p = reserve_space(xdr, 20 + 2*28 + 20 + len + 12);
1660
	*p++ = cpu_to_be32(OP_CREATE_SESSION);
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1661
	p = xdr_encode_hyper(p, clp->cl_ex_clid);
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	*p++ = cpu_to_be32(clp->cl_seqid);			/*Sequence id */
	*p++ = cpu_to_be32(args->flags);			/*flags */
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	/* Fore Channel */
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	*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 */
1669
	*p++ = cpu_to_be32(max_resp_sz_cached);		/* Max resp sz cached */
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	*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 */
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	*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 */
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	*p++ = cpu_to_be32(args->cb_program);		/* cb_program */
	*p++ = cpu_to_be32(1);
	*p++ = cpu_to_be32(RPC_AUTH_UNIX);			/* auth_sys */
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1686 1687

	/* authsys_parms rfc1831 */
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1688
	*p++ = cpu_to_be32((u32)clp->cl_boot_time.tv_nsec);	/* stamp */
1689
	p = xdr_encode_opaque(p, machine_name, len);
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	*p++ = cpu_to_be32(0);				/* UID */
	*p++ = cpu_to_be32(0);				/* GID */
1692
	*p = cpu_to_be32(0);				/* No more gids */
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1693 1694 1695
	hdr->nops++;
	hdr->replen += decode_create_session_maxsz;
}
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1696 1697 1698 1699 1700 1701

static void encode_destroy_session(struct xdr_stream *xdr,
				   struct nfs4_session *session,
				   struct compound_hdr *hdr)
{
	__be32 *p;
1702
	p = reserve_space(xdr, 4 + NFS4_MAX_SESSIONID_LEN);
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1703
	*p++ = cpu_to_be32(OP_DESTROY_SESSION);
1704
	xdr_encode_opaque_fixed(p, session->sess_id.data, NFS4_MAX_SESSIONID_LEN);
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1705 1706 1707
	hdr->nops++;
	hdr->replen += decode_destroy_session_maxsz;
}
1708 1709 1710 1711 1712 1713 1714 1715 1716 1717 1718 1719 1720

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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#endif /* CONFIG_NFS_V4_1 */

1723 1724 1725 1726 1727 1728
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;
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1729 1730 1731
	struct nfs4_slot_table *tp;
	struct nfs4_slot *slot;
	__be32 *p;
1732 1733 1734 1735

	if (!session)
		return;

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1736 1737 1738 1739 1740
	tp = &session->fc_slot_table;

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

1741
	p = reserve_space(xdr, 4 + NFS4_MAX_SESSIONID_LEN + 16);
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1742
	*p++ = cpu_to_be32(OP_SEQUENCE);
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1743 1744 1745 1746 1747 1748 1749 1750 1751 1752 1753 1754 1755

	/*
	 * 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
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1756
	p = xdr_encode_opaque_fixed(p, session->sess_id.data, NFS4_MAX_SESSIONID_LEN);
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1757 1758 1759
	*p++ = cpu_to_be32(slot->seq_nr);
	*p++ = cpu_to_be32(args->sa_slotid);
	*p++ = cpu_to_be32(tp->highest_used_slotid);
1760
	*p = cpu_to_be32(args->sa_cache_this);
1761 1762 1763 1764 1765
	hdr->nops++;
	hdr->replen += decode_sequence_maxsz;
#endif /* CONFIG_NFS_V4_1 */
}

1766 1767 1768 1769 1770 1771 1772 1773 1774 1775 1776 1777 1778 1779 1780 1781 1782 1783 1784 1785 1786 1787 1788 1789 1790 1791 1792 1793 1794 1795 1796 1797 1798 1799 1800 1801 1802 1803 1804 1805 1806 1807 1808 1809 1810 1811 1812 1813 1814 1815 1816 1817
#ifdef CONFIG_NFS_V4_1
static void
encode_getdeviceinfo(struct xdr_stream *xdr,
		     const struct nfs4_getdeviceinfo_args *args,
		     struct compound_hdr *hdr)
{
	__be32 *p;

	p = reserve_space(xdr, 16 + NFS4_DEVICEID4_SIZE);
	*p++ = cpu_to_be32(OP_GETDEVICEINFO);
	p = xdr_encode_opaque_fixed(p, args->pdev->dev_id.data,
				    NFS4_DEVICEID4_SIZE);
	*p++ = cpu_to_be32(args->pdev->layout_type);
	*p++ = cpu_to_be32(args->pdev->pglen);		/* gdia_maxcount */
	*p++ = cpu_to_be32(0);				/* bitmap length 0 */
	hdr->nops++;
	hdr->replen += decode_getdeviceinfo_maxsz;
}

static void
encode_layoutget(struct xdr_stream *xdr,
		      const struct nfs4_layoutget_args *args,
		      struct compound_hdr *hdr)
{
	nfs4_stateid stateid;
	__be32 *p;

	p = reserve_space(xdr, 44 + NFS4_STATEID_SIZE);
	*p++ = cpu_to_be32(OP_LAYOUTGET);
	*p++ = cpu_to_be32(0);     /* Signal layout available */
	*p++ = cpu_to_be32(args->type);
	*p++ = cpu_to_be32(args->range.iomode);
	p = xdr_encode_hyper(p, args->range.offset);
	p = xdr_encode_hyper(p, args->range.length);
	p = xdr_encode_hyper(p, args->minlength);
	pnfs_get_layout_stateid(&stateid, NFS_I(args->inode)->layout,
				args->ctx->state);
	p = xdr_encode_opaque_fixed(p, &stateid.data, NFS4_STATEID_SIZE);
	*p = cpu_to_be32(args->maxcount);

	dprintk("%s: 1st type:0x%x iomode:%d off:%lu len:%lu mc:%d\n",
		__func__,
		args->type,
		args->range.iomode,
		(unsigned long)args->range.offset,
		(unsigned long)args->range.length,
		args->maxcount);
	hdr->nops++;
	hdr->replen += decode_layoutget_maxsz;
}
#endif /* CONFIG_NFS_V4_1 */

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

1822 1823 1824 1825
static u32 nfs4_xdr_minorversion(const struct nfs4_sequence_args *args)
{
#if defined(CONFIG_NFS_V4_1)
	if (args->sa_session)
1826
		return args->sa_session->clp->cl_mvops->minor_version;
1827 1828 1829 1830
#endif /* CONFIG_NFS_V4_1 */
	return 0;
}

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/*
 * Encode an ACCESS request
 */
1834 1835
static void nfs4_xdr_enc_access(struct rpc_rqst *req, struct xdr_stream *xdr,
				const struct nfs4_accessargs *args)
L
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1836 1837
{
	struct compound_hdr hdr = {
1838
		.minorversion = nfs4_xdr_minorversion(&args->seq_args),
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1839 1840
	};

1841 1842 1843 1844 1845
	encode_compound_hdr(xdr, req, &hdr);
	encode_sequence(xdr, &args->seq_args, &hdr);
	encode_putfh(xdr, args->fh, &hdr);
	encode_access(xdr, args->access, &hdr);
	encode_getfattr(xdr, args->bitmask, &hdr);
1846
	encode_nops(&hdr);
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1847 1848 1849 1850 1851
}

/*
 * Encode LOOKUP request
 */
1852 1853
static void nfs4_xdr_enc_lookup(struct rpc_rqst *req, struct xdr_stream *xdr,
				const struct nfs4_lookup_arg *args)
L
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1854 1855
{
	struct compound_hdr hdr = {
1856
		.minorversion = nfs4_xdr_minorversion(&args->seq_args),
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1857 1858
	};

1859 1860 1861 1862 1863 1864
	encode_compound_hdr(xdr, req, &hdr);
	encode_sequence(xdr, &args->seq_args, &hdr);
	encode_putfh(xdr, args->dir_fh, &hdr);
	encode_lookup(xdr, args->name, &hdr);
	encode_getfh(xdr, &hdr);
	encode_getfattr(xdr, args->bitmask, &hdr);
1865
	encode_nops(&hdr);
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1866 1867 1868 1869 1870
}

/*
 * Encode LOOKUP_ROOT request
 */
1871 1872 1873
static void nfs4_xdr_enc_lookup_root(struct rpc_rqst *req,
				     struct xdr_stream *xdr,
				     const struct nfs4_lookup_root_arg *args)
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1874 1875
{
	struct compound_hdr hdr = {
1876
		.minorversion = nfs4_xdr_minorversion(&args->seq_args),
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1877 1878
	};

1879 1880 1881 1882 1883
	encode_compound_hdr(xdr, req, &hdr);
	encode_sequence(xdr, &args->seq_args, &hdr);
	encode_putrootfh(xdr, &hdr);
	encode_getfh(xdr, &hdr);
	encode_getfattr(xdr, args->bitmask, &hdr);
1884
	encode_nops(&hdr);
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1885 1886 1887 1888 1889
}

/*
 * Encode REMOVE request
 */
1890 1891
static void nfs4_xdr_enc_remove(struct rpc_rqst *req, struct xdr_stream *xdr,
				const struct nfs_removeargs *args)
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1892 1893
{
	struct compound_hdr hdr = {
1894
		.minorversion = nfs4_xdr_minorversion(&args->seq_args),
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1895 1896
	};

1897 1898 1899 1900 1901
	encode_compound_hdr(xdr, req, &hdr);
	encode_sequence(xdr, &args->seq_args, &hdr);
	encode_putfh(xdr, args->fh, &hdr);
	encode_remove(xdr, &args->name, &hdr);
	encode_getfattr(xdr, args->bitmask, &hdr);
1902
	encode_nops(&hdr);
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1903 1904 1905 1906 1907
}

/*
 * Encode RENAME request
 */
1908 1909
static void nfs4_xdr_enc_rename(struct rpc_rqst *req, struct xdr_stream *xdr,
				const struct nfs_renameargs *args)
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{
	struct compound_hdr hdr = {
1912
		.minorversion = nfs4_xdr_minorversion(&args->seq_args),
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1913 1914
	};

1915 1916 1917 1918 1919 1920 1921 1922 1923
	encode_compound_hdr(xdr, req, &hdr);
	encode_sequence(xdr, &args->seq_args, &hdr);
	encode_putfh(xdr, args->old_dir, &hdr);
	encode_savefh(xdr, &hdr);
	encode_putfh(xdr, args->new_dir, &hdr);
	encode_rename(xdr, args->old_name, args->new_name, &hdr);
	encode_getfattr(xdr, args->bitmask, &hdr);
	encode_restorefh(xdr, &hdr);
	encode_getfattr(xdr, args->bitmask, &hdr);
1924
	encode_nops(&hdr);
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1925 1926 1927 1928 1929
}

/*
 * Encode LINK request
 */
1930 1931
static void nfs4_xdr_enc_link(struct rpc_rqst *req, struct xdr_stream *xdr,
			     const struct nfs4_link_arg *args)
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{
	struct compound_hdr hdr = {
1934
		.minorversion = nfs4_xdr_minorversion(&args->seq_args),
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	};

1937 1938 1939 1940 1941 1942 1943 1944 1945
	encode_compound_hdr(xdr, req, &hdr);
	encode_sequence(xdr, &args->seq_args, &hdr);
	encode_putfh(xdr, args->fh, &hdr);
	encode_savefh(xdr, &hdr);
	encode_putfh(xdr, args->dir_fh, &hdr);
	encode_link(xdr, args->name, &hdr);
	encode_getfattr(xdr, args->bitmask, &hdr);
	encode_restorefh(xdr, &hdr);
	encode_getfattr(xdr, args->bitmask, &hdr);
1946
	encode_nops(&hdr);
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}

/*
 * Encode CREATE request
 */
1952 1953
static void nfs4_xdr_enc_create(struct rpc_rqst *req, struct xdr_stream *xdr,
				const struct nfs4_create_arg *args)
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{
	struct compound_hdr hdr = {
1956
		.minorversion = nfs4_xdr_minorversion(&args->seq_args),
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	};

1959 1960 1961 1962 1963 1964 1965 1966 1967
	encode_compound_hdr(xdr, req, &hdr);
	encode_sequence(xdr, &args->seq_args, &hdr);
	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);
1968
	encode_nops(&hdr);
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}

/*
 * Encode SYMLINK request
 */
1974 1975
static void nfs4_xdr_enc_symlink(struct rpc_rqst *req, struct xdr_stream *xdr,
				 const struct nfs4_create_arg *args)
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{
1977
	nfs4_xdr_enc_create(req, xdr, args);
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}

/*
 * Encode GETATTR request
 */
1983 1984
static void nfs4_xdr_enc_getattr(struct rpc_rqst *req, struct xdr_stream *xdr,
				 const struct nfs4_getattr_arg *args)
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1985 1986
{
	struct compound_hdr hdr = {
1987
		.minorversion = nfs4_xdr_minorversion(&args->seq_args),
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1988 1989
	};

1990 1991 1992 1993
	encode_compound_hdr(xdr, req, &hdr);
	encode_sequence(xdr, &args->seq_args, &hdr);
	encode_putfh(xdr, args->fh, &hdr);
	encode_getfattr(xdr, args->bitmask, &hdr);
1994
	encode_nops(&hdr);
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}

/*
 * Encode a CLOSE request
 */
2000 2001
static void nfs4_xdr_enc_close(struct rpc_rqst *req, struct xdr_stream *xdr,
			       struct nfs_closeargs *args)
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{
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2003
	struct compound_hdr hdr = {
2004
		.minorversion = nfs4_xdr_minorversion(&args->seq_args),
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2005 2006
	};

2007 2008 2009 2010 2011
	encode_compound_hdr(xdr, req, &hdr);
	encode_sequence(xdr, &args->seq_args, &hdr);
	encode_putfh(xdr, args->fh, &hdr);
	encode_close(xdr, args, &hdr);
	encode_getfattr(xdr, args->bitmask, &hdr);
2012
	encode_nops(&hdr);
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}

/*
 * Encode an OPEN request
 */
2018 2019
static void nfs4_xdr_enc_open(struct rpc_rqst *req, struct xdr_stream *xdr,
			      struct nfs_openargs *args)
L
Linus Torvalds 已提交
2020 2021
{
	struct compound_hdr hdr = {
2022
		.minorversion = nfs4_xdr_minorversion(&args->seq_args),
L
Linus Torvalds 已提交
2023 2024
	};

2025 2026 2027 2028 2029 2030 2031 2032 2033
	encode_compound_hdr(xdr, req, &hdr);
	encode_sequence(xdr, &args->seq_args, &hdr);
	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);
2034
	encode_nops(&hdr);
L
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2035 2036 2037 2038 2039
}

/*
 * Encode an OPEN_CONFIRM request
 */
2040 2041 2042
static void nfs4_xdr_enc_open_confirm(struct rpc_rqst *req,
				      struct xdr_stream *xdr,
				      struct nfs_open_confirmargs *args)
L
Linus Torvalds 已提交
2043 2044
{
	struct compound_hdr hdr = {
2045
		.nops   = 0,
L
Linus Torvalds 已提交
2046 2047
	};

2048 2049 2050
	encode_compound_hdr(xdr, req, &hdr);
	encode_putfh(xdr, args->fh, &hdr);
	encode_open_confirm(xdr, args, &hdr);
2051
	encode_nops(&hdr);
L
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2052 2053 2054 2055 2056
}

/*
 * Encode an OPEN request with no attributes.
 */
2057 2058 2059
static void nfs4_xdr_enc_open_noattr(struct rpc_rqst *req,
				     struct xdr_stream *xdr,
				     struct nfs_openargs *args)
L
Linus Torvalds 已提交
2060 2061
{
	struct compound_hdr hdr = {
2062
		.minorversion = nfs4_xdr_minorversion(&args->seq_args),
L
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2063 2064
	};

2065 2066 2067 2068 2069
	encode_compound_hdr(xdr, req, &hdr);
	encode_sequence(xdr, &args->seq_args, &hdr);
	encode_putfh(xdr, args->fh, &hdr);
	encode_open(xdr, args, &hdr);
	encode_getfattr(xdr, args->bitmask, &hdr);
2070
	encode_nops(&hdr);
L
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2071 2072 2073 2074 2075
}

/*
 * Encode an OPEN_DOWNGRADE request
 */
2076 2077 2078
static void nfs4_xdr_enc_open_downgrade(struct rpc_rqst *req,
					struct xdr_stream *xdr,
					struct nfs_closeargs *args)
L
Linus Torvalds 已提交
2079 2080
{
	struct compound_hdr hdr = {
2081
		.minorversion = nfs4_xdr_minorversion(&args->seq_args),
L
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2082 2083
	};

2084 2085 2086 2087 2088
	encode_compound_hdr(xdr, req, &hdr);
	encode_sequence(xdr, &args->seq_args, &hdr);
	encode_putfh(xdr, args->fh, &hdr);
	encode_open_downgrade(xdr, args, &hdr);
	encode_getfattr(xdr, args->bitmask, &hdr);
2089
	encode_nops(&hdr);
L
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2090 2091 2092 2093 2094
}

/*
 * Encode a LOCK request
 */
2095 2096
static void nfs4_xdr_enc_lock(struct rpc_rqst *req, struct xdr_stream *xdr,
			      struct nfs_lock_args *args)
L
Linus Torvalds 已提交
2097 2098
{
	struct compound_hdr hdr = {
2099
		.minorversion = nfs4_xdr_minorversion(&args->seq_args),
L
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2100 2101
	};

2102 2103 2104 2105
	encode_compound_hdr(xdr, req, &hdr);
	encode_sequence(xdr, &args->seq_args, &hdr);
	encode_putfh(xdr, args->fh, &hdr);
	encode_lock(xdr, args, &hdr);
2106
	encode_nops(&hdr);
L
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2107 2108 2109 2110 2111
}

/*
 * Encode a LOCKT request
 */
2112 2113
static void nfs4_xdr_enc_lockt(struct rpc_rqst *req, struct xdr_stream *xdr,
			       struct nfs_lockt_args *args)
L
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2114 2115
{
	struct compound_hdr hdr = {
2116
		.minorversion = nfs4_xdr_minorversion(&args->seq_args),
L
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2117 2118
	};

2119 2120 2121 2122
	encode_compound_hdr(xdr, req, &hdr);
	encode_sequence(xdr, &args->seq_args, &hdr);
	encode_putfh(xdr, args->fh, &hdr);
	encode_lockt(xdr, args, &hdr);
2123
	encode_nops(&hdr);
L
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2124 2125 2126 2127 2128
}

/*
 * Encode a LOCKU request
 */
2129 2130
static void nfs4_xdr_enc_locku(struct rpc_rqst *req, struct xdr_stream *xdr,
			       struct nfs_locku_args *args)
L
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2131 2132
{
	struct compound_hdr hdr = {
2133
		.minorversion = nfs4_xdr_minorversion(&args->seq_args),
L
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2134 2135
	};

2136 2137 2138 2139
	encode_compound_hdr(xdr, req, &hdr);
	encode_sequence(xdr, &args->seq_args, &hdr);
	encode_putfh(xdr, args->fh, &hdr);
	encode_locku(xdr, args, &hdr);
2140
	encode_nops(&hdr);
L
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2141 2142
}

2143 2144 2145
static void nfs4_xdr_enc_release_lockowner(struct rpc_rqst *req,
					   struct xdr_stream *xdr,
					struct nfs_release_lockowner_args *args)
2146 2147 2148 2149 2150
{
	struct compound_hdr hdr = {
		.minorversion = 0,
	};

2151 2152
	encode_compound_hdr(xdr, req, &hdr);
	encode_release_lockowner(xdr, &args->lock_owner, &hdr);
2153 2154 2155
	encode_nops(&hdr);
}

L
Linus Torvalds 已提交
2156 2157 2158
/*
 * Encode a READLINK request
 */
2159 2160
static void nfs4_xdr_enc_readlink(struct rpc_rqst *req, struct xdr_stream *xdr,
				  const struct nfs4_readlink *args)
L
Linus Torvalds 已提交
2161 2162
{
	struct compound_hdr hdr = {
2163
		.minorversion = nfs4_xdr_minorversion(&args->seq_args),
L
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2164 2165
	};

2166 2167 2168 2169
	encode_compound_hdr(xdr, req, &hdr);
	encode_sequence(xdr, &args->seq_args, &hdr);
	encode_putfh(xdr, args->fh, &hdr);
	encode_readlink(xdr, args, req, &hdr);
2170

2171
	xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2, args->pages,
2172
			args->pgbase, args->pglen);
2173
	encode_nops(&hdr);
L
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2174 2175 2176 2177 2178
}

/*
 * Encode a READDIR request
 */
2179 2180
static void nfs4_xdr_enc_readdir(struct rpc_rqst *req, struct xdr_stream *xdr,
				 const struct nfs4_readdir_arg *args)
L
Linus Torvalds 已提交
2181 2182
{
	struct compound_hdr hdr = {
2183
		.minorversion = nfs4_xdr_minorversion(&args->seq_args),
L
Linus Torvalds 已提交
2184 2185
	};

2186 2187 2188 2189
	encode_compound_hdr(xdr, req, &hdr);
	encode_sequence(xdr, &args->seq_args, &hdr);
	encode_putfh(xdr, args->fh, &hdr);
	encode_readdir(xdr, args, req, &hdr);
2190

2191
	xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2, args->pages,
2192 2193
			 args->pgbase, args->count);
	dprintk("%s: inlined page args = (%u, %p, %u, %u)\n",
2194
			__func__, hdr.replen << 2, args->pages,
2195
			args->pgbase, args->count);
2196
	encode_nops(&hdr);
L
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2197 2198 2199 2200 2201
}

/*
 * Encode a READ request
 */
2202 2203
static void nfs4_xdr_enc_read(struct rpc_rqst *req, struct xdr_stream *xdr,
			      struct nfs_readargs *args)
L
Linus Torvalds 已提交
2204 2205
{
	struct compound_hdr hdr = {
2206
		.minorversion = nfs4_xdr_minorversion(&args->seq_args),
L
Linus Torvalds 已提交
2207 2208
	};

2209 2210 2211 2212
	encode_compound_hdr(xdr, req, &hdr);
	encode_sequence(xdr, &args->seq_args, &hdr);
	encode_putfh(xdr, args->fh, &hdr);
	encode_read(xdr, args, &hdr);
L
Linus Torvalds 已提交
2213

2214
	xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2,
L
Linus Torvalds 已提交
2215
			 args->pages, args->pgbase, args->count);
2216
	req->rq_rcv_buf.flags |= XDRBUF_READ;
2217
	encode_nops(&hdr);
L
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2218 2219 2220 2221 2222
}

/*
 * Encode an SETATTR request
 */
2223 2224
static void nfs4_xdr_enc_setattr(struct rpc_rqst *req, struct xdr_stream *xdr,
				 struct nfs_setattrargs *args)
L
Linus Torvalds 已提交
2225
{
A
Andy Adamson 已提交
2226
	struct compound_hdr hdr = {
2227
		.minorversion = nfs4_xdr_minorversion(&args->seq_args),
A
Andy Adamson 已提交
2228 2229
	};

2230 2231 2232 2233 2234
	encode_compound_hdr(xdr, req, &hdr);
	encode_sequence(xdr, &args->seq_args, &hdr);
	encode_putfh(xdr, args->fh, &hdr);
	encode_setattr(xdr, args, args->server, &hdr);
	encode_getfattr(xdr, args->bitmask, &hdr);
2235
	encode_nops(&hdr);
L
Linus Torvalds 已提交
2236 2237
}

2238 2239 2240
/*
 * Encode a GETACL request
 */
2241 2242
static void nfs4_xdr_enc_getacl(struct rpc_rqst *req, struct xdr_stream *xdr,
				struct nfs_getaclargs *args)
2243 2244
{
	struct compound_hdr hdr = {
2245
		.minorversion = nfs4_xdr_minorversion(&args->seq_args),
2246
	};
2247
	uint32_t replen;
2248

2249 2250 2251
	encode_compound_hdr(xdr, req, &hdr);
	encode_sequence(xdr, &args->seq_args, &hdr);
	encode_putfh(xdr, args->fh, &hdr);
2252
	replen = hdr.replen + op_decode_hdr_maxsz + nfs4_fattr_bitmap_maxsz + 1;
2253
	encode_getattr_two(xdr, FATTR4_WORD0_ACL, 0, &hdr);
2254

2255
	xdr_inline_pages(&req->rq_rcv_buf, replen << 2,
2256
		args->acl_pages, args->acl_pgbase, args->acl_len);
2257
	encode_nops(&hdr);
2258 2259
}

L
Linus Torvalds 已提交
2260 2261 2262
/*
 * Encode a WRITE request
 */
2263 2264
static void nfs4_xdr_enc_write(struct rpc_rqst *req, struct xdr_stream *xdr,
			       struct nfs_writeargs *args)
L
Linus Torvalds 已提交
2265 2266
{
	struct compound_hdr hdr = {
2267
		.minorversion = nfs4_xdr_minorversion(&args->seq_args),
L
Linus Torvalds 已提交
2268 2269
	};

2270 2271 2272 2273
	encode_compound_hdr(xdr, req, &hdr);
	encode_sequence(xdr, &args->seq_args, &hdr);
	encode_putfh(xdr, args->fh, &hdr);
	encode_write(xdr, args, &hdr);
2274
	req->rq_snd_buf.flags |= XDRBUF_WRITE;
2275
	encode_getfattr(xdr, args->bitmask, &hdr);
2276
	encode_nops(&hdr);
L
Linus Torvalds 已提交
2277 2278 2279 2280 2281
}

/*
 *  a COMMIT request
 */
2282 2283
static void nfs4_xdr_enc_commit(struct rpc_rqst *req, struct xdr_stream *xdr,
				struct nfs_writeargs *args)
L
Linus Torvalds 已提交
2284 2285
{
	struct compound_hdr hdr = {
2286
		.minorversion = nfs4_xdr_minorversion(&args->seq_args),
L
Linus Torvalds 已提交
2287 2288
	};

2289 2290 2291 2292 2293
	encode_compound_hdr(xdr, req, &hdr);
	encode_sequence(xdr, &args->seq_args, &hdr);
	encode_putfh(xdr, args->fh, &hdr);
	encode_commit(xdr, args, &hdr);
	encode_getfattr(xdr, args->bitmask, &hdr);
2294
	encode_nops(&hdr);
L
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2295 2296 2297 2298 2299
}

/*
 * FSINFO request
 */
2300 2301
static void nfs4_xdr_enc_fsinfo(struct rpc_rqst *req, struct xdr_stream *xdr,
				struct nfs4_fsinfo_arg *args)
L
Linus Torvalds 已提交
2302 2303
{
	struct compound_hdr hdr = {
2304
		.minorversion = nfs4_xdr_minorversion(&args->seq_args),
L
Linus Torvalds 已提交
2305 2306
	};

2307 2308 2309 2310
	encode_compound_hdr(xdr, req, &hdr);
	encode_sequence(xdr, &args->seq_args, &hdr);
	encode_putfh(xdr, args->fh, &hdr);
	encode_fsinfo(xdr, args->bitmask, &hdr);
2311
	encode_nops(&hdr);
L
Linus Torvalds 已提交
2312 2313 2314 2315 2316
}

/*
 * a PATHCONF request
 */
2317 2318
static void nfs4_xdr_enc_pathconf(struct rpc_rqst *req, struct xdr_stream *xdr,
				  const struct nfs4_pathconf_arg *args)
L
Linus Torvalds 已提交
2319 2320
{
	struct compound_hdr hdr = {
2321
		.minorversion = nfs4_xdr_minorversion(&args->seq_args),
L
Linus Torvalds 已提交
2322 2323
	};

2324 2325 2326 2327
	encode_compound_hdr(xdr, req, &hdr);
	encode_sequence(xdr, &args->seq_args, &hdr);
	encode_putfh(xdr, args->fh, &hdr);
	encode_getattr_one(xdr, args->bitmask[0] & nfs4_pathconf_bitmap[0],
2328
			   &hdr);
2329
	encode_nops(&hdr);
L
Linus Torvalds 已提交
2330 2331 2332 2333 2334
}

/*
 * a STATFS request
 */
2335 2336
static void nfs4_xdr_enc_statfs(struct rpc_rqst *req, struct xdr_stream *xdr,
				const struct nfs4_statfs_arg *args)
L
Linus Torvalds 已提交
2337 2338
{
	struct compound_hdr hdr = {
2339
		.minorversion = nfs4_xdr_minorversion(&args->seq_args),
L
Linus Torvalds 已提交
2340 2341
	};

2342 2343 2344 2345
	encode_compound_hdr(xdr, req, &hdr);
	encode_sequence(xdr, &args->seq_args, &hdr);
	encode_putfh(xdr, args->fh, &hdr);
	encode_getattr_two(xdr, args->bitmask[0] & nfs4_statfs_bitmap[0],
2346
			   args->bitmask[1] & nfs4_statfs_bitmap[1], &hdr);
2347
	encode_nops(&hdr);
L
Linus Torvalds 已提交
2348 2349 2350 2351 2352
}

/*
 * GETATTR_BITMAP request
 */
2353 2354 2355
static void nfs4_xdr_enc_server_caps(struct rpc_rqst *req,
				     struct xdr_stream *xdr,
				     struct nfs4_server_caps_arg *args)
L
Linus Torvalds 已提交
2356 2357
{
	struct compound_hdr hdr = {
2358
		.minorversion = nfs4_xdr_minorversion(&args->seq_args),
L
Linus Torvalds 已提交
2359 2360
	};

2361 2362 2363 2364
	encode_compound_hdr(xdr, req, &hdr);
	encode_sequence(xdr, &args->seq_args, &hdr);
	encode_putfh(xdr, args->fhandle, &hdr);
	encode_getattr_one(xdr, FATTR4_WORD0_SUPPORTED_ATTRS|
2365 2366 2367
			   FATTR4_WORD0_LINK_SUPPORT|
			   FATTR4_WORD0_SYMLINK_SUPPORT|
			   FATTR4_WORD0_ACLSUPPORT, &hdr);
2368
	encode_nops(&hdr);
L
Linus Torvalds 已提交
2369 2370 2371 2372 2373
}

/*
 * a RENEW request
 */
2374 2375
static void nfs4_xdr_enc_renew(struct rpc_rqst *req, struct xdr_stream *xdr,
			       struct nfs_client *clp)
L
Linus Torvalds 已提交
2376 2377
{
	struct compound_hdr hdr = {
2378
		.nops	= 0,
L
Linus Torvalds 已提交
2379 2380
	};

2381 2382
	encode_compound_hdr(xdr, req, &hdr);
	encode_renew(xdr, clp, &hdr);
2383
	encode_nops(&hdr);
L
Linus Torvalds 已提交
2384 2385 2386 2387 2388
}

/*
 * a SETCLIENTID request
 */
2389 2390 2391
static void nfs4_xdr_enc_setclientid(struct rpc_rqst *req,
				     struct xdr_stream *xdr,
				     struct nfs4_setclientid *sc)
L
Linus Torvalds 已提交
2392 2393
{
	struct compound_hdr hdr = {
2394
		.nops	= 0,
L
Linus Torvalds 已提交
2395 2396
	};

2397 2398
	encode_compound_hdr(xdr, req, &hdr);
	encode_setclientid(xdr, sc, &hdr);
2399
	encode_nops(&hdr);
L
Linus Torvalds 已提交
2400 2401 2402 2403 2404
}

/*
 * a SETCLIENTID_CONFIRM request
 */
2405 2406 2407
static void nfs4_xdr_enc_setclientid_confirm(struct rpc_rqst *req,
					     struct xdr_stream *xdr,
					     struct nfs4_setclientid_res *arg)
L
Linus Torvalds 已提交
2408 2409
{
	struct compound_hdr hdr = {
2410
		.nops	= 0,
L
Linus Torvalds 已提交
2411 2412 2413
	};
	const u32 lease_bitmap[2] = { FATTR4_WORD0_LEASE_TIME, 0 };

2414 2415 2416 2417
	encode_compound_hdr(xdr, req, &hdr);
	encode_setclientid_confirm(xdr, arg, &hdr);
	encode_putrootfh(xdr, &hdr);
	encode_fsinfo(xdr, lease_bitmap, &hdr);
2418
	encode_nops(&hdr);
L
Linus Torvalds 已提交
2419 2420 2421 2422 2423
}

/*
 * DELEGRETURN request
 */
2424 2425 2426
static void nfs4_xdr_enc_delegreturn(struct rpc_rqst *req,
				     struct xdr_stream *xdr,
				     const struct nfs4_delegreturnargs *args)
L
Linus Torvalds 已提交
2427 2428
{
	struct compound_hdr hdr = {
2429
		.minorversion = nfs4_xdr_minorversion(&args->seq_args),
L
Linus Torvalds 已提交
2430 2431
	};

2432 2433 2434 2435 2436
	encode_compound_hdr(xdr, req, &hdr);
	encode_sequence(xdr, &args->seq_args, &hdr);
	encode_putfh(xdr, args->fhandle, &hdr);
	encode_delegreturn(xdr, args->stateid, &hdr);
	encode_getfattr(xdr, args->bitmask, &hdr);
2437
	encode_nops(&hdr);
L
Linus Torvalds 已提交
2438 2439
}

2440 2441 2442
/*
 * Encode FS_LOCATIONS request
 */
2443 2444 2445
static void nfs4_xdr_enc_fs_locations(struct rpc_rqst *req,
				      struct xdr_stream *xdr,
				      struct nfs4_fs_locations_arg *args)
2446 2447
{
	struct compound_hdr hdr = {
2448
		.minorversion = nfs4_xdr_minorversion(&args->seq_args),
2449
	};
2450
	uint32_t replen;
2451

2452 2453 2454 2455
	encode_compound_hdr(xdr, req, &hdr);
	encode_sequence(xdr, &args->seq_args, &hdr);
	encode_putfh(xdr, args->dir_fh, &hdr);
	encode_lookup(xdr, args->name, &hdr);
2456
	replen = hdr.replen;	/* get the attribute into args->page */
2457
	encode_fs_locations(xdr, args->bitmask, &hdr);
2458

2459
	xdr_inline_pages(&req->rq_rcv_buf, replen << 2, &args->page,
2460
			0, PAGE_SIZE);
2461
	encode_nops(&hdr);
2462 2463
}

B
Benny Halevy 已提交
2464 2465 2466 2467
#if defined(CONFIG_NFS_V4_1)
/*
 * EXCHANGE_ID request
 */
2468 2469 2470
static void nfs4_xdr_enc_exchange_id(struct rpc_rqst *req,
				     struct xdr_stream *xdr,
				     struct nfs41_exchange_id_args *args)
B
Benny Halevy 已提交
2471 2472
{
	struct compound_hdr hdr = {
2473
		.minorversion = args->client->cl_mvops->minor_version,
B
Benny Halevy 已提交
2474 2475
	};

2476 2477
	encode_compound_hdr(xdr, req, &hdr);
	encode_exchange_id(xdr, args, &hdr);
B
Benny Halevy 已提交
2478 2479
	encode_nops(&hdr);
}
A
Andy Adamson 已提交
2480

A
Andy Adamson 已提交
2481 2482 2483
/*
 * a CREATE_SESSION request
 */
2484 2485 2486
static void nfs4_xdr_enc_create_session(struct rpc_rqst *req,
					struct xdr_stream *xdr,
					struct nfs41_create_session_args *args)
A
Andy Adamson 已提交
2487 2488
{
	struct compound_hdr hdr = {
2489
		.minorversion = args->client->cl_mvops->minor_version,
A
Andy Adamson 已提交
2490 2491
	};

2492 2493
	encode_compound_hdr(xdr, req, &hdr);
	encode_create_session(xdr, args, &hdr);
A
Andy Adamson 已提交
2494 2495 2496
	encode_nops(&hdr);
}

A
Andy Adamson 已提交
2497 2498 2499
/*
 * a DESTROY_SESSION request
 */
2500 2501 2502
static void nfs4_xdr_enc_destroy_session(struct rpc_rqst *req,
					 struct xdr_stream *xdr,
					 struct nfs4_session *session)
A
Andy Adamson 已提交
2503 2504
{
	struct compound_hdr hdr = {
2505
		.minorversion = session->clp->cl_mvops->minor_version,
A
Andy Adamson 已提交
2506 2507
	};

2508 2509
	encode_compound_hdr(xdr, req, &hdr);
	encode_destroy_session(xdr, session, &hdr);
A
Andy Adamson 已提交
2510 2511 2512
	encode_nops(&hdr);
}

A
Andy Adamson 已提交
2513 2514 2515
/*
 * a SEQUENCE request
 */
2516 2517
static void nfs4_xdr_enc_sequence(struct rpc_rqst *req, struct xdr_stream *xdr,
				  struct nfs4_sequence_args *args)
A
Andy Adamson 已提交
2518 2519 2520 2521 2522
{
	struct compound_hdr hdr = {
		.minorversion = nfs4_xdr_minorversion(args),
	};

2523 2524
	encode_compound_hdr(xdr, req, &hdr);
	encode_sequence(xdr, args, &hdr);
A
Andy Adamson 已提交
2525 2526 2527
	encode_nops(&hdr);
}

A
Andy Adamson 已提交
2528 2529 2530
/*
 * a GET_LEASE_TIME request
 */
2531 2532 2533
static void nfs4_xdr_enc_get_lease_time(struct rpc_rqst *req,
					struct xdr_stream *xdr,
					struct nfs4_get_lease_time_args *args)
A
Andy Adamson 已提交
2534 2535 2536 2537 2538 2539
{
	struct compound_hdr hdr = {
		.minorversion = nfs4_xdr_minorversion(&args->la_seq_args),
	};
	const u32 lease_bitmap[2] = { FATTR4_WORD0_LEASE_TIME, 0 };

2540 2541 2542 2543
	encode_compound_hdr(xdr, req, &hdr);
	encode_sequence(xdr, &args->la_seq_args, &hdr);
	encode_putrootfh(xdr, &hdr);
	encode_fsinfo(xdr, lease_bitmap, &hdr);
A
Andy Adamson 已提交
2544 2545
	encode_nops(&hdr);
}
2546 2547 2548 2549

/*
 * a RECLAIM_COMPLETE request
 */
2550 2551 2552
static void nfs4_xdr_enc_reclaim_complete(struct rpc_rqst *req,
					  struct xdr_stream *xdr,
				struct nfs41_reclaim_complete_args *args)
2553 2554 2555 2556 2557
{
	struct compound_hdr hdr = {
		.minorversion = nfs4_xdr_minorversion(&args->seq_args)
	};

2558 2559 2560
	encode_compound_hdr(xdr, req, &hdr);
	encode_sequence(xdr, &args->seq_args, &hdr);
	encode_reclaim_complete(xdr, args, &hdr);
2561 2562 2563
	encode_nops(&hdr);
}

2564 2565 2566
/*
 * Encode GETDEVICEINFO request
 */
2567 2568 2569
static void nfs4_xdr_enc_getdeviceinfo(struct rpc_rqst *req,
				       struct xdr_stream *xdr,
				       struct nfs4_getdeviceinfo_args *args)
2570 2571 2572 2573 2574
{
	struct compound_hdr hdr = {
		.minorversion = nfs4_xdr_minorversion(&args->seq_args),
	};

2575 2576 2577
	encode_compound_hdr(xdr, req, &hdr);
	encode_sequence(xdr, &args->seq_args, &hdr);
	encode_getdeviceinfo(xdr, args, &hdr);
2578 2579 2580 2581 2582 2583 2584 2585 2586 2587 2588 2589 2590

	/* set up reply kvec. Subtract notification bitmap max size (2)
	 * so that notification bitmap is put in xdr_buf tail */
	xdr_inline_pages(&req->rq_rcv_buf, (hdr.replen - 2) << 2,
			 args->pdev->pages, args->pdev->pgbase,
			 args->pdev->pglen);

	encode_nops(&hdr);
}

/*
 *  Encode LAYOUTGET request
 */
2591 2592 2593
static void nfs4_xdr_enc_layoutget(struct rpc_rqst *req,
				   struct xdr_stream *xdr,
				   struct nfs4_layoutget_args *args)
2594 2595 2596 2597 2598
{
	struct compound_hdr hdr = {
		.minorversion = nfs4_xdr_minorversion(&args->seq_args),
	};

2599 2600 2601 2602
	encode_compound_hdr(xdr, req, &hdr);
	encode_sequence(xdr, &args->seq_args, &hdr);
	encode_putfh(xdr, NFS_FH(args->inode), &hdr);
	encode_layoutget(xdr, args, &hdr);
2603 2604
	encode_nops(&hdr);
}
B
Benny Halevy 已提交
2605 2606
#endif /* CONFIG_NFS_V4_1 */

2607 2608 2609 2610 2611 2612
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
2613

2614
static int decode_opaque_inline(struct xdr_stream *xdr, unsigned int *len, char **string)
L
Linus Torvalds 已提交
2615
{
A
Al Viro 已提交
2616
	__be32 *p;
L
Linus Torvalds 已提交
2617

B
Benny Halevy 已提交
2618 2619 2620
	p = xdr_inline_decode(xdr, 4);
	if (unlikely(!p))
		goto out_overflow;
2621
	*len = be32_to_cpup(p);
B
Benny Halevy 已提交
2622 2623 2624
	p = xdr_inline_decode(xdr, *len);
	if (unlikely(!p))
		goto out_overflow;
L
Linus Torvalds 已提交
2625 2626
	*string = (char *)p;
	return 0;
B
Benny Halevy 已提交
2627 2628 2629
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
L
Linus Torvalds 已提交
2630 2631 2632 2633
}

static int decode_compound_hdr(struct xdr_stream *xdr, struct compound_hdr *hdr)
{
A
Al Viro 已提交
2634
	__be32 *p;
L
Linus Torvalds 已提交
2635

B
Benny Halevy 已提交
2636 2637 2638
	p = xdr_inline_decode(xdr, 8);
	if (unlikely(!p))
		goto out_overflow;
B
Benny Halevy 已提交
2639
	hdr->status = be32_to_cpup(p++);
2640
	hdr->taglen = be32_to_cpup(p);
2641

B
Benny Halevy 已提交
2642 2643 2644
	p = xdr_inline_decode(xdr, hdr->taglen + 4);
	if (unlikely(!p))
		goto out_overflow;
L
Linus Torvalds 已提交
2645 2646
	hdr->tag = (char *)p;
	p += XDR_QUADLEN(hdr->taglen);
2647
	hdr->nops = be32_to_cpup(p);
2648 2649
	if (unlikely(hdr->nops < 1))
		return nfs4_stat_to_errno(hdr->status);
L
Linus Torvalds 已提交
2650
	return 0;
B
Benny Halevy 已提交
2651 2652 2653
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
L
Linus Torvalds 已提交
2654 2655 2656 2657
}

static int decode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 expected)
{
A
Al Viro 已提交
2658
	__be32 *p;
L
Linus Torvalds 已提交
2659 2660 2661
	uint32_t opnum;
	int32_t nfserr;

B
Benny Halevy 已提交
2662 2663 2664
	p = xdr_inline_decode(xdr, 8);
	if (unlikely(!p))
		goto out_overflow;
B
Benny Halevy 已提交
2665
	opnum = be32_to_cpup(p++);
L
Linus Torvalds 已提交
2666
	if (opnum != expected) {
2667 2668
		dprintk("nfs: Server returned operation"
			" %d but we issued a request for %d\n",
L
Linus Torvalds 已提交
2669 2670 2671
				opnum, expected);
		return -EIO;
	}
2672
	nfserr = be32_to_cpup(p);
L
Linus Torvalds 已提交
2673
	if (nfserr != NFS_OK)
2674
		return nfs4_stat_to_errno(nfserr);
L
Linus Torvalds 已提交
2675
	return 0;
B
Benny Halevy 已提交
2676 2677 2678
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
L
Linus Torvalds 已提交
2679 2680 2681
}

/* Dummy routine */
2682
static int decode_ace(struct xdr_stream *xdr, void *ace, struct nfs_client *clp)
L
Linus Torvalds 已提交
2683
{
A
Al Viro 已提交
2684
	__be32 *p;
2685
	unsigned int strlen;
L
Linus Torvalds 已提交
2686 2687
	char *str;

B
Benny Halevy 已提交
2688 2689 2690 2691 2692
	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
2693 2694 2695 2696
}

static int decode_attr_bitmap(struct xdr_stream *xdr, uint32_t *bitmap)
{
A
Al Viro 已提交
2697 2698
	uint32_t bmlen;
	__be32 *p;
L
Linus Torvalds 已提交
2699

B
Benny Halevy 已提交
2700 2701 2702
	p = xdr_inline_decode(xdr, 4);
	if (unlikely(!p))
		goto out_overflow;
2703
	bmlen = be32_to_cpup(p);
L
Linus Torvalds 已提交
2704 2705

	bitmap[0] = bitmap[1] = 0;
B
Benny Halevy 已提交
2706 2707 2708
	p = xdr_inline_decode(xdr, (bmlen << 2));
	if (unlikely(!p))
		goto out_overflow;
L
Linus Torvalds 已提交
2709
	if (bmlen > 0) {
B
Benny Halevy 已提交
2710
		bitmap[0] = be32_to_cpup(p++);
L
Linus Torvalds 已提交
2711
		if (bmlen > 1)
2712
			bitmap[1] = be32_to_cpup(p);
L
Linus Torvalds 已提交
2713 2714
	}
	return 0;
B
Benny Halevy 已提交
2715 2716 2717
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
L
Linus Torvalds 已提交
2718 2719
}

A
Al Viro 已提交
2720
static inline int decode_attr_length(struct xdr_stream *xdr, uint32_t *attrlen, __be32 **savep)
L
Linus Torvalds 已提交
2721
{
A
Al Viro 已提交
2722
	__be32 *p;
L
Linus Torvalds 已提交
2723

B
Benny Halevy 已提交
2724 2725 2726
	p = xdr_inline_decode(xdr, 4);
	if (unlikely(!p))
		goto out_overflow;
2727
	*attrlen = be32_to_cpup(p);
L
Linus Torvalds 已提交
2728 2729
	*savep = xdr->p;
	return 0;
B
Benny Halevy 已提交
2730 2731 2732
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
L
Linus Torvalds 已提交
2733 2734 2735 2736 2737
}

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
2738 2739 2740 2741
		int ret;
		ret = decode_attr_bitmap(xdr, bitmask);
		if (unlikely(ret < 0))
			return ret;
L
Linus Torvalds 已提交
2742 2743 2744
		bitmap[0] &= ~FATTR4_WORD0_SUPPORTED_ATTRS;
	} else
		bitmask[0] = bitmask[1] = 0;
2745
	dprintk("%s: bitmask=%08x:%08x\n", __func__, bitmask[0], bitmask[1]);
L
Linus Torvalds 已提交
2746 2747 2748 2749 2750
	return 0;
}

static int decode_attr_type(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *type)
{
A
Al Viro 已提交
2751
	__be32 *p;
2752
	int ret = 0;
L
Linus Torvalds 已提交
2753 2754 2755 2756 2757

	*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
2758 2759 2760
		p = xdr_inline_decode(xdr, 4);
		if (unlikely(!p))
			goto out_overflow;
2761
		*type = be32_to_cpup(p);
L
Linus Torvalds 已提交
2762
		if (*type < NF4REG || *type > NF4NAMEDATTR) {
2763
			dprintk("%s: bad type %d\n", __func__, *type);
L
Linus Torvalds 已提交
2764 2765 2766
			return -EIO;
		}
		bitmap[0] &= ~FATTR4_WORD0_TYPE;
2767
		ret = NFS_ATTR_FATTR_TYPE;
L
Linus Torvalds 已提交
2768
	}
2769
	dprintk("%s: type=0%o\n", __func__, nfs_type2fmt[*type]);
2770
	return ret;
B
Benny Halevy 已提交
2771 2772 2773
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
L
Linus Torvalds 已提交
2774 2775 2776 2777
}

static int decode_attr_change(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *change)
{
A
Al Viro 已提交
2778
	__be32 *p;
2779
	int ret = 0;
L
Linus Torvalds 已提交
2780 2781 2782 2783 2784

	*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
2785 2786 2787
		p = xdr_inline_decode(xdr, 8);
		if (unlikely(!p))
			goto out_overflow;
2788
		xdr_decode_hyper(p, change);
L
Linus Torvalds 已提交
2789
		bitmap[0] &= ~FATTR4_WORD0_CHANGE;
2790
		ret = NFS_ATTR_FATTR_CHANGE;
L
Linus Torvalds 已提交
2791
	}
2792
	dprintk("%s: change attribute=%Lu\n", __func__,
L
Linus Torvalds 已提交
2793
			(unsigned long long)*change);
2794
	return ret;
B
Benny Halevy 已提交
2795 2796 2797
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
L
Linus Torvalds 已提交
2798 2799 2800 2801
}

static int decode_attr_size(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *size)
{
A
Al Viro 已提交
2802
	__be32 *p;
2803
	int ret = 0;
L
Linus Torvalds 已提交
2804 2805 2806 2807 2808

	*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
2809 2810 2811
		p = xdr_inline_decode(xdr, 8);
		if (unlikely(!p))
			goto out_overflow;
2812
		xdr_decode_hyper(p, size);
L
Linus Torvalds 已提交
2813
		bitmap[0] &= ~FATTR4_WORD0_SIZE;
2814
		ret = NFS_ATTR_FATTR_SIZE;
L
Linus Torvalds 已提交
2815
	}
2816
	dprintk("%s: file size=%Lu\n", __func__, (unsigned long long)*size);
2817
	return ret;
B
Benny Halevy 已提交
2818 2819 2820
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
L
Linus Torvalds 已提交
2821 2822 2823 2824
}

static int decode_attr_link_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
{
A
Al Viro 已提交
2825
	__be32 *p;
L
Linus Torvalds 已提交
2826 2827 2828 2829 2830

	*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
2831 2832 2833
		p = xdr_inline_decode(xdr, 4);
		if (unlikely(!p))
			goto out_overflow;
2834
		*res = be32_to_cpup(p);
L
Linus Torvalds 已提交
2835 2836
		bitmap[0] &= ~FATTR4_WORD0_LINK_SUPPORT;
	}
2837
	dprintk("%s: link support=%s\n", __func__, *res == 0 ? "false" : "true");
L
Linus Torvalds 已提交
2838
	return 0;
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_symlink_support(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 = 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
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_SYMLINK_SUPPORT;
	}
2858
	dprintk("%s: symlink support=%s\n", __func__, *res == 0 ? "false" : "true");
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
static int decode_attr_fsid(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_fsid *fsid)
L
Linus Torvalds 已提交
2866
{
A
Al Viro 已提交
2867
	__be32 *p;
2868
	int ret = 0;
L
Linus Torvalds 已提交
2869 2870 2871 2872 2873 2874

	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
2875 2876 2877
		p = xdr_inline_decode(xdr, 16);
		if (unlikely(!p))
			goto out_overflow;
B
Benny Halevy 已提交
2878
		p = xdr_decode_hyper(p, &fsid->major);
2879
		xdr_decode_hyper(p, &fsid->minor);
L
Linus Torvalds 已提交
2880
		bitmap[0] &= ~FATTR4_WORD0_FSID;
2881
		ret = NFS_ATTR_FATTR_FSID;
L
Linus Torvalds 已提交
2882
	}
2883
	dprintk("%s: fsid=(0x%Lx/0x%Lx)\n", __func__,
L
Linus Torvalds 已提交
2884 2885
			(unsigned long long)fsid->major,
			(unsigned long long)fsid->minor);
2886
	return ret;
B
Benny Halevy 已提交
2887 2888 2889
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
L
Linus Torvalds 已提交
2890 2891 2892 2893
}

static int decode_attr_lease_time(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
{
A
Al Viro 已提交
2894
	__be32 *p;
L
Linus Torvalds 已提交
2895 2896 2897 2898 2899

	*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
2900 2901 2902
		p = xdr_inline_decode(xdr, 4);
		if (unlikely(!p))
			goto out_overflow;
2903
		*res = be32_to_cpup(p);
L
Linus Torvalds 已提交
2904 2905
		bitmap[0] &= ~FATTR4_WORD0_LEASE_TIME;
	}
2906
	dprintk("%s: file size=%u\n", __func__, (unsigned int)*res);
L
Linus Torvalds 已提交
2907
	return 0;
B
Benny Halevy 已提交
2908 2909 2910
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
L
Linus Torvalds 已提交
2911 2912
}

2913 2914 2915 2916 2917 2918 2919 2920 2921 2922 2923 2924 2925 2926 2927 2928 2929 2930 2931 2932 2933 2934 2935
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;

2936 2937
	if (fh != NULL)
		memset(fh, 0, sizeof(*fh));
2938 2939 2940 2941 2942 2943 2944 2945 2946 2947 2948 2949 2950

	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;
2951 2952 2953 2954
		if (fh != NULL) {
			memcpy(fh->data, p, len);
			fh->size = len;
		}
2955 2956 2957 2958 2959 2960 2961 2962
		bitmap[0] &= ~FATTR4_WORD0_FILEHANDLE;
	}
	return 0;
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
}

L
Linus Torvalds 已提交
2963 2964
static int decode_attr_aclsupport(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
{
A
Al Viro 已提交
2965
	__be32 *p;
L
Linus Torvalds 已提交
2966 2967 2968 2969 2970

	*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
2971 2972 2973
		p = xdr_inline_decode(xdr, 4);
		if (unlikely(!p))
			goto out_overflow;
2974
		*res = be32_to_cpup(p);
L
Linus Torvalds 已提交
2975 2976
		bitmap[0] &= ~FATTR4_WORD0_ACLSUPPORT;
	}
2977
	dprintk("%s: ACLs supported=%u\n", __func__, (unsigned int)*res);
L
Linus Torvalds 已提交
2978
	return 0;
B
Benny Halevy 已提交
2979 2980 2981
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
L
Linus Torvalds 已提交
2982 2983 2984 2985
}

static int decode_attr_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
{
A
Al Viro 已提交
2986
	__be32 *p;
2987
	int ret = 0;
L
Linus Torvalds 已提交
2988 2989 2990 2991 2992

	*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
2993 2994 2995
		p = xdr_inline_decode(xdr, 8);
		if (unlikely(!p))
			goto out_overflow;
2996
		xdr_decode_hyper(p, fileid);
L
Linus Torvalds 已提交
2997
		bitmap[0] &= ~FATTR4_WORD0_FILEID;
2998
		ret = NFS_ATTR_FATTR_FILEID;
L
Linus Torvalds 已提交
2999
	}
3000
	dprintk("%s: fileid=%Lu\n", __func__, (unsigned long long)*fileid);
3001
	return ret;
B
Benny Halevy 已提交
3002 3003 3004
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
L
Linus Torvalds 已提交
3005 3006
}

3007 3008
static int decode_attr_mounted_on_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
{
A
Al Viro 已提交
3009
	__be32 *p;
3010
	int ret = 0;
3011 3012 3013 3014 3015

	*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
3016 3017 3018
		p = xdr_inline_decode(xdr, 8);
		if (unlikely(!p))
			goto out_overflow;
3019
		xdr_decode_hyper(p, fileid);
3020
		bitmap[1] &= ~FATTR4_WORD1_MOUNTED_ON_FILEID;
3021
		ret = NFS_ATTR_FATTR_FILEID;
3022
	}
3023
	dprintk("%s: fileid=%Lu\n", __func__, (unsigned long long)*fileid);
3024
	return ret;
B
Benny Halevy 已提交
3025 3026 3027
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
3028 3029
}

L
Linus Torvalds 已提交
3030 3031
static int decode_attr_files_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
{
A
Al Viro 已提交
3032
	__be32 *p;
L
Linus Torvalds 已提交
3033 3034 3035 3036 3037 3038
	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
3039 3040 3041
		p = xdr_inline_decode(xdr, 8);
		if (unlikely(!p))
			goto out_overflow;
3042
		xdr_decode_hyper(p, res);
L
Linus Torvalds 已提交
3043 3044
		bitmap[0] &= ~FATTR4_WORD0_FILES_AVAIL;
	}
3045
	dprintk("%s: files avail=%Lu\n", __func__, (unsigned long long)*res);
L
Linus Torvalds 已提交
3046
	return status;
B
Benny Halevy 已提交
3047 3048 3049
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
L
Linus Torvalds 已提交
3050 3051 3052 3053
}

static int decode_attr_files_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
{
A
Al Viro 已提交
3054
	__be32 *p;
L
Linus Torvalds 已提交
3055 3056 3057 3058 3059 3060
	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
3061 3062 3063
		p = xdr_inline_decode(xdr, 8);
		if (unlikely(!p))
			goto out_overflow;
3064
		xdr_decode_hyper(p, res);
L
Linus Torvalds 已提交
3065 3066
		bitmap[0] &= ~FATTR4_WORD0_FILES_FREE;
	}
3067
	dprintk("%s: files free=%Lu\n", __func__, (unsigned long long)*res);
L
Linus Torvalds 已提交
3068
	return status;
B
Benny Halevy 已提交
3069 3070 3071
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
L
Linus Torvalds 已提交
3072 3073 3074 3075
}

static int decode_attr_files_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
{
A
Al Viro 已提交
3076
	__be32 *p;
L
Linus Torvalds 已提交
3077 3078 3079 3080 3081 3082
	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
3083 3084 3085
		p = xdr_inline_decode(xdr, 8);
		if (unlikely(!p))
			goto out_overflow;
3086
		xdr_decode_hyper(p, res);
L
Linus Torvalds 已提交
3087 3088
		bitmap[0] &= ~FATTR4_WORD0_FILES_TOTAL;
	}
3089
	dprintk("%s: files total=%Lu\n", __func__, (unsigned long long)*res);
L
Linus Torvalds 已提交
3090
	return status;
B
Benny Halevy 已提交
3091 3092 3093
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
L
Linus Torvalds 已提交
3094 3095
}

3096 3097
static int decode_pathname(struct xdr_stream *xdr, struct nfs4_pathname *path)
{
3098
	u32 n;
A
Al Viro 已提交
3099
	__be32 *p;
3100 3101
	int status = 0;

B
Benny Halevy 已提交
3102 3103 3104
	p = xdr_inline_decode(xdr, 4);
	if (unlikely(!p))
		goto out_overflow;
3105
	n = be32_to_cpup(p);
3106 3107
	if (n == 0)
		goto root_path;
3108 3109 3110 3111 3112 3113 3114 3115 3116 3117 3118 3119 3120 3121 3122 3123 3124 3125 3126 3127
	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;
3128 3129 3130 3131 3132 3133 3134
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;
3135 3136 3137 3138
out_eio:
	dprintk(" status %d", status);
	status = -EIO;
	goto out;
B
Benny Halevy 已提交
3139 3140 3141
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
3142 3143 3144
}

static int decode_attr_fs_locations(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs4_fs_locations *res)
3145 3146
{
	int n;
A
Al Viro 已提交
3147
	__be32 *p;
3148 3149 3150 3151 3152 3153 3154
	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;
3155
	dprintk("%s: fsroot ", __func__);
3156
	status = decode_pathname(xdr, &res->fs_path);
3157 3158
	if (unlikely(status != 0))
		goto out;
B
Benny Halevy 已提交
3159 3160 3161
	p = xdr_inline_decode(xdr, 4);
	if (unlikely(!p))
		goto out_overflow;
3162
	n = be32_to_cpup(p);
3163 3164 3165 3166
	if (n <= 0)
		goto out_eio;
	res->nlocations = 0;
	while (res->nlocations < n) {
3167
		u32 m;
3168
		struct nfs4_fs_location *loc = &res->locations[res->nlocations];
3169

B
Benny Halevy 已提交
3170 3171 3172
		p = xdr_inline_decode(xdr, 4);
		if (unlikely(!p))
			goto out_overflow;
3173
		m = be32_to_cpup(p);
3174 3175

		loc->nservers = 0;
3176
		dprintk("%s: servers ", __func__);
3177 3178 3179 3180 3181 3182 3183 3184 3185
		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 {
3186 3187 3188
				unsigned int i;
				dprintk("%s: using first %u of %u servers "
					"returned for location %u\n",
3189
						__func__,
3190 3191
						NFS4_FS_LOCATION_MAXSERVERS,
						m, res->nlocations);
3192
				for (i = loc->nservers; i < m; i++) {
T
Trond Myklebust 已提交
3193
					unsigned int len;
3194 3195 3196 3197 3198 3199 3200 3201
					char *data;
					status = decode_opaque_inline(xdr, &len, &data);
					if (unlikely(status != 0))
						goto out_eio;
				}
			}
		}
		status = decode_pathname(xdr, &loc->rootpath);
3202 3203
		if (unlikely(status != 0))
			goto out_eio;
3204
		if (res->nlocations < NFS4_FS_LOCATIONS_MAXENTRIES)
3205 3206
			res->nlocations++;
	}
3207 3208
	if (res->nlocations != 0)
		status = NFS_ATTR_FATTR_V4_REFERRAL;
3209
out:
3210
	dprintk("%s: fs_locations done, error = %d\n", __func__, status);
3211
	return status;
B
Benny Halevy 已提交
3212 3213
out_overflow:
	print_overflow_msg(__func__, xdr);
3214 3215 3216 3217 3218
out_eio:
	status = -EIO;
	goto out;
}

L
Linus Torvalds 已提交
3219 3220
static int decode_attr_maxfilesize(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
{
A
Al Viro 已提交
3221
	__be32 *p;
L
Linus Torvalds 已提交
3222 3223 3224 3225 3226 3227
	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
3228 3229 3230
		p = xdr_inline_decode(xdr, 8);
		if (unlikely(!p))
			goto out_overflow;
3231
		xdr_decode_hyper(p, res);
L
Linus Torvalds 已提交
3232 3233
		bitmap[0] &= ~FATTR4_WORD0_MAXFILESIZE;
	}
3234
	dprintk("%s: maxfilesize=%Lu\n", __func__, (unsigned long long)*res);
L
Linus Torvalds 已提交
3235
	return status;
B
Benny Halevy 已提交
3236 3237 3238
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
L
Linus Torvalds 已提交
3239 3240 3241 3242
}

static int decode_attr_maxlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxlink)
{
A
Al Viro 已提交
3243
	__be32 *p;
L
Linus Torvalds 已提交
3244 3245 3246 3247 3248 3249
	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
3250 3251 3252
		p = xdr_inline_decode(xdr, 4);
		if (unlikely(!p))
			goto out_overflow;
3253
		*maxlink = be32_to_cpup(p);
L
Linus Torvalds 已提交
3254 3255
		bitmap[0] &= ~FATTR4_WORD0_MAXLINK;
	}
3256
	dprintk("%s: maxlink=%u\n", __func__, *maxlink);
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_maxname(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxname)
{
A
Al Viro 已提交
3265
	__be32 *p;
L
Linus Torvalds 已提交
3266 3267 3268 3269 3270 3271
	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
3272 3273 3274
		p = xdr_inline_decode(xdr, 4);
		if (unlikely(!p))
			goto out_overflow;
3275
		*maxname = be32_to_cpup(p);
L
Linus Torvalds 已提交
3276 3277
		bitmap[0] &= ~FATTR4_WORD0_MAXNAME;
	}
3278
	dprintk("%s: maxname=%u\n", __func__, *maxname);
L
Linus Torvalds 已提交
3279
	return status;
B
Benny Halevy 已提交
3280 3281 3282
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
L
Linus Torvalds 已提交
3283 3284 3285 3286
}

static int decode_attr_maxread(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
{
A
Al Viro 已提交
3287
	__be32 *p;
L
Linus Torvalds 已提交
3288 3289 3290 3291 3292 3293 3294
	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
3295 3296 3297
		p = xdr_inline_decode(xdr, 8);
		if (unlikely(!p))
			goto out_overflow;
3298
		xdr_decode_hyper(p, &maxread);
L
Linus Torvalds 已提交
3299 3300 3301 3302 3303
		if (maxread > 0x7FFFFFFF)
			maxread = 0x7FFFFFFF;
		*res = (uint32_t)maxread;
		bitmap[0] &= ~FATTR4_WORD0_MAXREAD;
	}
3304
	dprintk("%s: maxread=%lu\n", __func__, (unsigned long)*res);
L
Linus Torvalds 已提交
3305
	return status;
B
Benny Halevy 已提交
3306 3307 3308
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
L
Linus Torvalds 已提交
3309 3310 3311 3312
}

static int decode_attr_maxwrite(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
{
A
Al Viro 已提交
3313
	__be32 *p;
L
Linus Torvalds 已提交
3314 3315 3316 3317 3318 3319 3320
	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
3321 3322 3323
		p = xdr_inline_decode(xdr, 8);
		if (unlikely(!p))
			goto out_overflow;
3324
		xdr_decode_hyper(p, &maxwrite);
L
Linus Torvalds 已提交
3325 3326 3327 3328 3329
		if (maxwrite > 0x7FFFFFFF)
			maxwrite = 0x7FFFFFFF;
		*res = (uint32_t)maxwrite;
		bitmap[0] &= ~FATTR4_WORD0_MAXWRITE;
	}
3330
	dprintk("%s: maxwrite=%lu\n", __func__, (unsigned long)*res);
L
Linus Torvalds 已提交
3331
	return status;
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
static int decode_attr_mode(struct xdr_stream *xdr, uint32_t *bitmap, umode_t *mode)
L
Linus Torvalds 已提交
3338
{
3339
	uint32_t tmp;
A
Al Viro 已提交
3340
	__be32 *p;
3341
	int ret = 0;
L
Linus Torvalds 已提交
3342 3343 3344 3345 3346

	*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
3347 3348 3349
		p = xdr_inline_decode(xdr, 4);
		if (unlikely(!p))
			goto out_overflow;
3350
		tmp = be32_to_cpup(p);
3351
		*mode = tmp & ~S_IFMT;
L
Linus Torvalds 已提交
3352
		bitmap[1] &= ~FATTR4_WORD1_MODE;
3353
		ret = NFS_ATTR_FATTR_MODE;
L
Linus Torvalds 已提交
3354
	}
3355
	dprintk("%s: file mode=0%o\n", __func__, (unsigned int)*mode);
3356
	return ret;
B
Benny Halevy 已提交
3357 3358 3359
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
L
Linus Torvalds 已提交
3360 3361 3362 3363
}

static int decode_attr_nlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *nlink)
{
A
Al Viro 已提交
3364
	__be32 *p;
3365
	int ret = 0;
L
Linus Torvalds 已提交
3366 3367 3368 3369 3370

	*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
3371 3372 3373
		p = xdr_inline_decode(xdr, 4);
		if (unlikely(!p))
			goto out_overflow;
3374
		*nlink = be32_to_cpup(p);
L
Linus Torvalds 已提交
3375
		bitmap[1] &= ~FATTR4_WORD1_NUMLINKS;
3376
		ret = NFS_ATTR_FATTR_NLINK;
L
Linus Torvalds 已提交
3377
	}
3378
	dprintk("%s: nlink=%u\n", __func__, (unsigned int)*nlink);
3379
	return ret;
B
Benny Halevy 已提交
3380 3381 3382
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
L
Linus Torvalds 已提交
3383 3384
}

3385 3386
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
3387
{
A
Al Viro 已提交
3388 3389
	uint32_t len;
	__be32 *p;
3390
	int ret = 0;
L
Linus Torvalds 已提交
3391 3392 3393 3394 3395

	*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
3396 3397 3398
		p = xdr_inline_decode(xdr, 4);
		if (unlikely(!p))
			goto out_overflow;
3399
		len = be32_to_cpup(p);
B
Benny Halevy 已提交
3400 3401 3402
		p = xdr_inline_decode(xdr, len);
		if (unlikely(!p))
			goto out_overflow;
3403 3404 3405
		if (!may_sleep) {
			/* do nothing */
		} else if (len < XDR_MAX_NETOBJ) {
3406 3407 3408
			if (nfs_map_name_to_uid(clp, (char *)p, len, uid) == 0)
				ret = NFS_ATTR_FATTR_OWNER;
			else
L
Linus Torvalds 已提交
3409
				dprintk("%s: nfs_map_name_to_uid failed!\n",
3410
						__func__);
L
Linus Torvalds 已提交
3411
		} else
3412
			dprintk("%s: name too long (%u)!\n",
3413
					__func__, len);
L
Linus Torvalds 已提交
3414 3415
		bitmap[1] &= ~FATTR4_WORD1_OWNER;
	}
3416
	dprintk("%s: uid=%d\n", __func__, (int)*uid);
3417
	return ret;
B
Benny Halevy 已提交
3418 3419 3420
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
L
Linus Torvalds 已提交
3421 3422
}

3423 3424
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
3425
{
A
Al Viro 已提交
3426 3427
	uint32_t len;
	__be32 *p;
3428
	int ret = 0;
L
Linus Torvalds 已提交
3429 3430 3431 3432 3433

	*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
3434 3435 3436
		p = xdr_inline_decode(xdr, 4);
		if (unlikely(!p))
			goto out_overflow;
3437
		len = be32_to_cpup(p);
B
Benny Halevy 已提交
3438 3439 3440
		p = xdr_inline_decode(xdr, len);
		if (unlikely(!p))
			goto out_overflow;
3441 3442 3443
		if (!may_sleep) {
			/* do nothing */
		} else if (len < XDR_MAX_NETOBJ) {
3444 3445 3446
			if (nfs_map_group_to_gid(clp, (char *)p, len, gid) == 0)
				ret = NFS_ATTR_FATTR_GROUP;
			else
L
Linus Torvalds 已提交
3447
				dprintk("%s: nfs_map_group_to_gid failed!\n",
3448
						__func__);
L
Linus Torvalds 已提交
3449
		} else
3450
			dprintk("%s: name too long (%u)!\n",
3451
					__func__, len);
L
Linus Torvalds 已提交
3452 3453
		bitmap[1] &= ~FATTR4_WORD1_OWNER_GROUP;
	}
3454
	dprintk("%s: gid=%d\n", __func__, (int)*gid);
3455
	return ret;
B
Benny Halevy 已提交
3456 3457 3458
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
L
Linus Torvalds 已提交
3459 3460 3461 3462
}

static int decode_attr_rdev(struct xdr_stream *xdr, uint32_t *bitmap, dev_t *rdev)
{
A
Al Viro 已提交
3463 3464
	uint32_t major = 0, minor = 0;
	__be32 *p;
3465
	int ret = 0;
L
Linus Torvalds 已提交
3466 3467 3468 3469 3470 3471 3472

	*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
3473 3474 3475
		p = xdr_inline_decode(xdr, 8);
		if (unlikely(!p))
			goto out_overflow;
B
Benny Halevy 已提交
3476
		major = be32_to_cpup(p++);
3477
		minor = be32_to_cpup(p);
L
Linus Torvalds 已提交
3478 3479 3480 3481
		tmp = MKDEV(major, minor);
		if (MAJOR(tmp) == major && MINOR(tmp) == minor)
			*rdev = tmp;
		bitmap[1] &= ~ FATTR4_WORD1_RAWDEV;
3482
		ret = NFS_ATTR_FATTR_RDEV;
L
Linus Torvalds 已提交
3483
	}
3484
	dprintk("%s: rdev=(0x%x:0x%x)\n", __func__, major, minor);
3485
	return ret;
B
Benny Halevy 已提交
3486 3487 3488
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
L
Linus Torvalds 已提交
3489 3490 3491 3492
}

static int decode_attr_space_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
{
A
Al Viro 已提交
3493
	__be32 *p;
L
Linus Torvalds 已提交
3494 3495 3496 3497 3498 3499
	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
3500 3501 3502
		p = xdr_inline_decode(xdr, 8);
		if (unlikely(!p))
			goto out_overflow;
3503
		xdr_decode_hyper(p, res);
L
Linus Torvalds 已提交
3504 3505
		bitmap[1] &= ~FATTR4_WORD1_SPACE_AVAIL;
	}
3506
	dprintk("%s: space avail=%Lu\n", __func__, (unsigned long long)*res);
L
Linus Torvalds 已提交
3507
	return status;
B
Benny Halevy 已提交
3508 3509 3510
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
L
Linus Torvalds 已提交
3511 3512 3513 3514
}

static int decode_attr_space_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
{
A
Al Viro 已提交
3515
	__be32 *p;
L
Linus Torvalds 已提交
3516 3517 3518 3519 3520 3521
	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
3522 3523 3524
		p = xdr_inline_decode(xdr, 8);
		if (unlikely(!p))
			goto out_overflow;
3525
		xdr_decode_hyper(p, res);
L
Linus Torvalds 已提交
3526 3527
		bitmap[1] &= ~FATTR4_WORD1_SPACE_FREE;
	}
3528
	dprintk("%s: space free=%Lu\n", __func__, (unsigned long long)*res);
L
Linus Torvalds 已提交
3529
	return status;
B
Benny Halevy 已提交
3530 3531 3532
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
L
Linus Torvalds 已提交
3533 3534 3535 3536
}

static int decode_attr_space_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
{
A
Al Viro 已提交
3537
	__be32 *p;
L
Linus Torvalds 已提交
3538 3539 3540 3541 3542 3543
	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
3544 3545 3546
		p = xdr_inline_decode(xdr, 8);
		if (unlikely(!p))
			goto out_overflow;
3547
		xdr_decode_hyper(p, res);
L
Linus Torvalds 已提交
3548 3549
		bitmap[1] &= ~FATTR4_WORD1_SPACE_TOTAL;
	}
3550
	dprintk("%s: space total=%Lu\n", __func__, (unsigned long long)*res);
L
Linus Torvalds 已提交
3551
	return status;
B
Benny Halevy 已提交
3552 3553 3554
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
L
Linus Torvalds 已提交
3555 3556 3557 3558
}

static int decode_attr_space_used(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *used)
{
A
Al Viro 已提交
3559
	__be32 *p;
3560
	int ret = 0;
L
Linus Torvalds 已提交
3561 3562 3563 3564 3565

	*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
3566 3567 3568
		p = xdr_inline_decode(xdr, 8);
		if (unlikely(!p))
			goto out_overflow;
3569
		xdr_decode_hyper(p, used);
L
Linus Torvalds 已提交
3570
		bitmap[1] &= ~FATTR4_WORD1_SPACE_USED;
3571
		ret = NFS_ATTR_FATTR_SPACE_USED;
L
Linus Torvalds 已提交
3572
	}
3573
	dprintk("%s: space used=%Lu\n", __func__,
L
Linus Torvalds 已提交
3574
			(unsigned long long)*used);
3575
	return ret;
B
Benny Halevy 已提交
3576 3577 3578
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
L
Linus Torvalds 已提交
3579 3580 3581 3582
}

static int decode_attr_time(struct xdr_stream *xdr, struct timespec *time)
{
A
Al Viro 已提交
3583
	__be32 *p;
L
Linus Torvalds 已提交
3584 3585 3586
	uint64_t sec;
	uint32_t nsec;

B
Benny Halevy 已提交
3587 3588 3589
	p = xdr_inline_decode(xdr, 12);
	if (unlikely(!p))
		goto out_overflow;
B
Benny Halevy 已提交
3590
	p = xdr_decode_hyper(p, &sec);
3591
	nsec = be32_to_cpup(p);
L
Linus Torvalds 已提交
3592 3593 3594
	time->tv_sec = (time_t)sec;
	time->tv_nsec = (long)nsec;
	return 0;
B
Benny Halevy 已提交
3595 3596 3597
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
L
Linus Torvalds 已提交
3598 3599 3600 3601 3602 3603 3604 3605 3606 3607 3608 3609
}

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);
3610 3611
		if (status == 0)
			status = NFS_ATTR_FATTR_ATIME;
L
Linus Torvalds 已提交
3612 3613
		bitmap[1] &= ~FATTR4_WORD1_TIME_ACCESS;
	}
3614
	dprintk("%s: atime=%ld\n", __func__, (long)time->tv_sec);
L
Linus Torvalds 已提交
3615 3616 3617 3618 3619 3620 3621 3622 3623 3624 3625 3626 3627
	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);
3628 3629
		if (status == 0)
			status = NFS_ATTR_FATTR_CTIME;
L
Linus Torvalds 已提交
3630 3631
		bitmap[1] &= ~FATTR4_WORD1_TIME_METADATA;
	}
3632
	dprintk("%s: ctime=%ld\n", __func__, (long)time->tv_sec);
L
Linus Torvalds 已提交
3633 3634 3635
	return status;
}

3636 3637 3638 3639 3640 3641 3642 3643 3644 3645 3646 3647 3648 3649 3650 3651 3652 3653
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
3654 3655 3656 3657 3658 3659 3660 3661 3662 3663
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);
3664 3665
		if (status == 0)
			status = NFS_ATTR_FATTR_MTIME;
L
Linus Torvalds 已提交
3666 3667
		bitmap[1] &= ~FATTR4_WORD1_TIME_MODIFY;
	}
3668
	dprintk("%s: mtime=%ld\n", __func__, (long)time->tv_sec);
L
Linus Torvalds 已提交
3669 3670 3671
	return status;
}

A
Al Viro 已提交
3672
static int verify_attr_len(struct xdr_stream *xdr, __be32 *savep, uint32_t attrlen)
L
Linus Torvalds 已提交
3673 3674 3675 3676 3677
{
	unsigned int attrwords = XDR_QUADLEN(attrlen);
	unsigned int nwords = xdr->p - savep;

	if (unlikely(attrwords != nwords)) {
3678 3679
		dprintk("%s: server returned incorrect attribute length: "
			"%u %c %u\n",
3680
				__func__,
L
Linus Torvalds 已提交
3681 3682 3683 3684 3685 3686 3687 3688 3689 3690
				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
3691
	__be32 *p;
L
Linus Torvalds 已提交
3692

B
Benny Halevy 已提交
3693 3694 3695
	p = xdr_inline_decode(xdr, 20);
	if (unlikely(!p))
		goto out_overflow;
B
Benny Halevy 已提交
3696
	cinfo->atomic = be32_to_cpup(p++);
B
Benny Halevy 已提交
3697
	p = xdr_decode_hyper(p, &cinfo->before);
3698
	xdr_decode_hyper(p, &cinfo->after);
L
Linus Torvalds 已提交
3699
	return 0;
B
Benny Halevy 已提交
3700 3701 3702
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
L
Linus Torvalds 已提交
3703 3704 3705 3706
}

static int decode_access(struct xdr_stream *xdr, struct nfs4_accessres *access)
{
A
Al Viro 已提交
3707
	__be32 *p;
L
Linus Torvalds 已提交
3708 3709 3710 3711 3712 3713
	uint32_t supp, acc;
	int status;

	status = decode_op_hdr(xdr, OP_ACCESS);
	if (status)
		return status;
B
Benny Halevy 已提交
3714 3715 3716
	p = xdr_inline_decode(xdr, 8);
	if (unlikely(!p))
		goto out_overflow;
B
Benny Halevy 已提交
3717
	supp = be32_to_cpup(p++);
3718
	acc = be32_to_cpup(p);
L
Linus Torvalds 已提交
3719 3720 3721
	access->supported = supp;
	access->access = acc;
	return 0;
B
Benny Halevy 已提交
3722 3723 3724
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
L
Linus Torvalds 已提交
3725 3726
}

3727
static int decode_opaque_fixed(struct xdr_stream *xdr, void *buf, size_t len)
L
Linus Torvalds 已提交
3728
{
A
Al Viro 已提交
3729
	__be32 *p;
3730 3731 3732 3733 3734 3735 3736 3737 3738 3739 3740 3741 3742 3743 3744 3745 3746

	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
3747 3748 3749
	int status;

	status = decode_op_hdr(xdr, OP_CLOSE);
3750 3751
	if (status != -EIO)
		nfs_increment_open_seqid(status, res->seqid);
3752 3753 3754
	if (!status)
		status = decode_stateid(xdr, &res->stateid);
	return status;
L
Linus Torvalds 已提交
3755 3756
}

3757 3758 3759
static int decode_verifier(struct xdr_stream *xdr, void *verifier)
{
	return decode_opaque_fixed(xdr, verifier, 8);
L
Linus Torvalds 已提交
3760 3761 3762 3763 3764 3765 3766
}

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

	status = decode_op_hdr(xdr, OP_COMMIT);
3767 3768 3769
	if (!status)
		status = decode_verifier(xdr, res->verf->verifier);
	return status;
L
Linus Torvalds 已提交
3770 3771 3772 3773
}

static int decode_create(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
{
A
Al Viro 已提交
3774
	__be32 *p;
L
Linus Torvalds 已提交
3775 3776 3777 3778 3779 3780 3781 3782
	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
3783 3784 3785
	p = xdr_inline_decode(xdr, 4);
	if (unlikely(!p))
		goto out_overflow;
3786
	bmlen = be32_to_cpup(p);
B
Benny Halevy 已提交
3787 3788 3789 3790 3791 3792
	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
3793 3794 3795 3796
}

static int decode_server_caps(struct xdr_stream *xdr, struct nfs4_server_caps_res *res)
{
A
Al Viro 已提交
3797
	__be32 *savep;
3798
	uint32_t attrlen, bitmap[2] = {0};
L
Linus Torvalds 已提交
3799 3800 3801 3802 3803 3804 3805 3806 3807 3808 3809 3810 3811 3812 3813 3814 3815 3816
	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:
3817
	dprintk("%s: xdr returned %d!\n", __func__, -status);
L
Linus Torvalds 已提交
3818 3819
	return status;
}
3820

L
Linus Torvalds 已提交
3821 3822
static int decode_statfs(struct xdr_stream *xdr, struct nfs_fsstat *fsstat)
{
A
Al Viro 已提交
3823
	__be32 *savep;
3824
	uint32_t attrlen, bitmap[2] = {0};
L
Linus Torvalds 已提交
3825
	int status;
3826

L
Linus Torvalds 已提交
3827 3828 3829 3830 3831 3832 3833 3834 3835 3836 3837 3838 3839 3840 3841 3842 3843 3844 3845 3846 3847 3848
	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:
3849
	dprintk("%s: xdr returned %d!\n", __func__, -status);
L
Linus Torvalds 已提交
3850 3851 3852 3853 3854
	return status;
}

static int decode_pathconf(struct xdr_stream *xdr, struct nfs_pathconf *pathconf)
{
A
Al Viro 已提交
3855
	__be32 *savep;
3856
	uint32_t attrlen, bitmap[2] = {0};
L
Linus Torvalds 已提交
3857
	int status;
3858

L
Linus Torvalds 已提交
3859 3860 3861 3862 3863 3864 3865 3866 3867 3868 3869 3870 3871 3872
	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:
3873
	dprintk("%s: xdr returned %d!\n", __func__, -status);
L
Linus Torvalds 已提交
3874 3875 3876
	return status;
}

3877 3878
static int decode_getfattr_attrs(struct xdr_stream *xdr, uint32_t *bitmap,
		struct nfs_fattr *fattr, struct nfs_fh *fh,
3879
		const struct nfs_server *server, int may_sleep)
L
Linus Torvalds 已提交
3880
{
3881 3882
	int status;
	umode_t fmode = 0;
3883
	uint64_t fileid;
3884
	uint32_t type;
L
Linus Torvalds 已提交
3885

3886 3887
	status = decode_attr_type(xdr, bitmap, &type);
	if (status < 0)
L
Linus Torvalds 已提交
3888
		goto xdr_error;
3889 3890 3891 3892 3893
	fattr->mode = 0;
	if (status != 0) {
		fattr->mode |= nfs_type2fmt[type];
		fattr->valid |= status;
	}
L
Linus Torvalds 已提交
3894

3895 3896
	status = decode_attr_change(xdr, bitmap, &fattr->change_attr);
	if (status < 0)
L
Linus Torvalds 已提交
3897
		goto xdr_error;
3898
	fattr->valid |= status;
3899 3900 3901

	status = decode_attr_size(xdr, bitmap, &fattr->size);
	if (status < 0)
L
Linus Torvalds 已提交
3902
		goto xdr_error;
3903
	fattr->valid |= status;
3904 3905 3906

	status = decode_attr_fsid(xdr, bitmap, &fattr->fsid);
	if (status < 0)
L
Linus Torvalds 已提交
3907
		goto xdr_error;
3908
	fattr->valid |= status;
3909

3910 3911 3912 3913 3914 3915 3916 3917
	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;

3918 3919
	status = decode_attr_fileid(xdr, bitmap, &fattr->fileid);
	if (status < 0)
L
Linus Torvalds 已提交
3920
		goto xdr_error;
3921
	fattr->valid |= status;
3922 3923

	status = decode_attr_fs_locations(xdr, bitmap, container_of(fattr,
3924
						struct nfs4_fs_locations,
3925 3926
						fattr));
	if (status < 0)
3927
		goto xdr_error;
3928
	fattr->valid |= status;
3929 3930 3931

	status = decode_attr_mode(xdr, bitmap, &fmode);
	if (status < 0)
L
Linus Torvalds 已提交
3932
		goto xdr_error;
3933 3934 3935 3936
	if (status != 0) {
		fattr->mode |= fmode;
		fattr->valid |= status;
	}
3937 3938 3939

	status = decode_attr_nlink(xdr, bitmap, &fattr->nlink);
	if (status < 0)
L
Linus Torvalds 已提交
3940
		goto xdr_error;
3941
	fattr->valid |= status;
3942

3943 3944
	status = decode_attr_owner(xdr, bitmap, server->nfs_client,
			&fattr->uid, may_sleep);
3945
	if (status < 0)
L
Linus Torvalds 已提交
3946
		goto xdr_error;
3947
	fattr->valid |= status;
3948

3949 3950
	status = decode_attr_group(xdr, bitmap, server->nfs_client,
			&fattr->gid, may_sleep);
3951
	if (status < 0)
L
Linus Torvalds 已提交
3952
		goto xdr_error;
3953
	fattr->valid |= status;
3954 3955 3956

	status = decode_attr_rdev(xdr, bitmap, &fattr->rdev);
	if (status < 0)
L
Linus Torvalds 已提交
3957
		goto xdr_error;
3958
	fattr->valid |= status;
3959 3960 3961

	status = decode_attr_space_used(xdr, bitmap, &fattr->du.nfs3.used);
	if (status < 0)
L
Linus Torvalds 已提交
3962
		goto xdr_error;
3963
	fattr->valid |= status;
3964 3965 3966

	status = decode_attr_time_access(xdr, bitmap, &fattr->atime);
	if (status < 0)
L
Linus Torvalds 已提交
3967
		goto xdr_error;
3968
	fattr->valid |= status;
3969 3970 3971

	status = decode_attr_time_metadata(xdr, bitmap, &fattr->ctime);
	if (status < 0)
L
Linus Torvalds 已提交
3972
		goto xdr_error;
3973
	fattr->valid |= status;
3974 3975 3976

	status = decode_attr_time_modify(xdr, bitmap, &fattr->mtime);
	if (status < 0)
L
Linus Torvalds 已提交
3977
		goto xdr_error;
3978
	fattr->valid |= status;
3979 3980 3981

	status = decode_attr_mounted_on_fileid(xdr, bitmap, &fileid);
	if (status < 0)
3982
		goto xdr_error;
3983
	if (status != 0 && !(fattr->valid & status)) {
3984
		fattr->fileid = fileid;
3985 3986
		fattr->valid |= status;
	}
3987

3988 3989 3990 3991 3992 3993 3994 3995 3996 3997 3998 3999 4000 4001 4002 4003 4004 4005 4006 4007 4008 4009 4010 4011 4012 4013 4014 4015 4016
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;

4017
	status = verify_attr_len(xdr, savep, attrlen);
L
Linus Torvalds 已提交
4018
xdr_error:
4019
	dprintk("%s: xdr returned %d\n", __func__, -status);
L
Linus Torvalds 已提交
4020 4021 4022
	return status;
}

4023 4024 4025 4026 4027
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
4028

4029 4030 4031 4032 4033 4034 4035 4036 4037 4038 4039 4040 4041 4042 4043 4044 4045 4046 4047 4048 4049 4050 4051 4052 4053 4054 4055 4056 4057 4058 4059 4060 4061 4062 4063 4064 4065 4066 4067 4068 4069 4070 4071 4072 4073 4074 4075 4076 4077 4078 4079 4080 4081 4082 4083
/*
 * Decode potentially multiple layout types. Currently we only support
 * one layout driver per file system.
 */
static int decode_first_pnfs_layout_type(struct xdr_stream *xdr,
					 uint32_t *layouttype)
{
	uint32_t *p;
	int num;

	p = xdr_inline_decode(xdr, 4);
	if (unlikely(!p))
		goto out_overflow;
	num = be32_to_cpup(p);

	/* pNFS is not supported by the underlying file system */
	if (num == 0) {
		*layouttype = 0;
		return 0;
	}
	if (num > 1)
		printk(KERN_INFO "%s: Warning: Multiple pNFS layout drivers "
			"per filesystem not supported\n", __func__);

	/* Decode and set first layout type, move xdr->p past unused types */
	p = xdr_inline_decode(xdr, num * 4);
	if (unlikely(!p))
		goto out_overflow;
	*layouttype = be32_to_cpup(p);
	return 0;
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
}

/*
 * The type of file system exported.
 * Note we must ensure that layouttype is set in any non-error case.
 */
static int decode_attr_pnfstype(struct xdr_stream *xdr, uint32_t *bitmap,
				uint32_t *layouttype)
{
	int status = 0;

	dprintk("%s: bitmap is %x\n", __func__, bitmap[1]);
	if (unlikely(bitmap[1] & (FATTR4_WORD1_FS_LAYOUT_TYPES - 1U)))
		return -EIO;
	if (bitmap[1] & FATTR4_WORD1_FS_LAYOUT_TYPES) {
		status = decode_first_pnfs_layout_type(xdr, layouttype);
		bitmap[1] &= ~FATTR4_WORD1_FS_LAYOUT_TYPES;
	} else
		*layouttype = 0;
	return status;
}

L
Linus Torvalds 已提交
4084 4085
static int decode_fsinfo(struct xdr_stream *xdr, struct nfs_fsinfo *fsinfo)
{
A
Al Viro 已提交
4086
	__be32 *savep;
L
Linus Torvalds 已提交
4087 4088 4089 4090 4091 4092 4093 4094 4095 4096 4097 4098 4099 4100 4101 4102 4103 4104 4105 4106 4107 4108
	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;
4109
	status = decode_attr_time_delta(xdr, bitmap, &fsinfo->time_delta);
4110 4111 4112
	if (status != 0)
		goto xdr_error;
	status = decode_attr_pnfstype(xdr, bitmap, &fsinfo->layouttype);
4113 4114
	if (status != 0)
		goto xdr_error;
L
Linus Torvalds 已提交
4115 4116 4117

	status = verify_attr_len(xdr, savep, attrlen);
xdr_error:
4118
	dprintk("%s: xdr returned %d!\n", __func__, -status);
L
Linus Torvalds 已提交
4119 4120 4121 4122 4123
	return status;
}

static int decode_getfh(struct xdr_stream *xdr, struct nfs_fh *fh)
{
A
Al Viro 已提交
4124
	__be32 *p;
L
Linus Torvalds 已提交
4125 4126 4127
	uint32_t len;
	int status;

4128 4129 4130
	/* Zero handle first to allow comparisons */
	memset(fh, 0, sizeof(*fh));

L
Linus Torvalds 已提交
4131 4132 4133 4134
	status = decode_op_hdr(xdr, OP_GETFH);
	if (status)
		return status;

B
Benny Halevy 已提交
4135 4136 4137
	p = xdr_inline_decode(xdr, 4);
	if (unlikely(!p))
		goto out_overflow;
4138
	len = be32_to_cpup(p);
L
Linus Torvalds 已提交
4139 4140 4141
	if (len > NFS4_FHSIZE)
		return -EIO;
	fh->size = len;
B
Benny Halevy 已提交
4142 4143 4144
	p = xdr_inline_decode(xdr, len);
	if (unlikely(!p))
		goto out_overflow;
B
Benny Halevy 已提交
4145
	memcpy(fh->data, p, len);
L
Linus Torvalds 已提交
4146
	return 0;
B
Benny Halevy 已提交
4147 4148 4149
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
L
Linus Torvalds 已提交
4150 4151 4152 4153 4154
}

static int decode_link(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
{
	int status;
4155

L
Linus Torvalds 已提交
4156 4157 4158 4159 4160 4161 4162 4163 4164
	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
4165
static int decode_lock_denied (struct xdr_stream *xdr, struct file_lock *fl)
L
Linus Torvalds 已提交
4166
{
T
Trond Myklebust 已提交
4167
	uint64_t offset, length, clientid;
A
Al Viro 已提交
4168
	__be32 *p;
T
Trond Myklebust 已提交
4169
	uint32_t namelen, type;
L
Linus Torvalds 已提交
4170

4171
	p = xdr_inline_decode(xdr, 32); /* read 32 bytes */
B
Benny Halevy 已提交
4172 4173
	if (unlikely(!p))
		goto out_overflow;
4174
	p = xdr_decode_hyper(p, &offset); /* read 2 8-byte long words */
B
Benny Halevy 已提交
4175
	p = xdr_decode_hyper(p, &length);
4176 4177
	type = be32_to_cpup(p++); /* 4 byte read */
	if (fl != NULL) { /* manipulate file lock */
T
Trond Myklebust 已提交
4178 4179 4180 4181 4182 4183 4184 4185 4186
		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;
	}
4187 4188 4189
	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
4190 4191 4192 4193 4194
	if (likely(p))
		return -NFS4ERR_DENIED;
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
L
Linus Torvalds 已提交
4195 4196
}

T
Trond Myklebust 已提交
4197
static int decode_lock(struct xdr_stream *xdr, struct nfs_lock_res *res)
L
Linus Torvalds 已提交
4198 4199 4200 4201
{
	int status;

	status = decode_op_hdr(xdr, OP_LOCK);
4202 4203
	if (status == -EIO)
		goto out;
L
Linus Torvalds 已提交
4204
	if (status == 0) {
4205 4206 4207
		status = decode_stateid(xdr, &res->stateid);
		if (unlikely(status))
			goto out;
L
Linus Torvalds 已提交
4208
	} else if (status == -NFS4ERR_DENIED)
4209 4210 4211 4212 4213
		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
4214 4215 4216
	return status;
}

T
Trond Myklebust 已提交
4217
static int decode_lockt(struct xdr_stream *xdr, struct nfs_lockt_res *res)
L
Linus Torvalds 已提交
4218 4219 4220 4221
{
	int status;
	status = decode_op_hdr(xdr, OP_LOCKT);
	if (status == -NFS4ERR_DENIED)
T
Trond Myklebust 已提交
4222
		return decode_lock_denied(xdr, res->denied);
L
Linus Torvalds 已提交
4223 4224 4225
	return status;
}

T
Trond Myklebust 已提交
4226
static int decode_locku(struct xdr_stream *xdr, struct nfs_locku_res *res)
L
Linus Torvalds 已提交
4227 4228 4229 4230
{
	int status;

	status = decode_op_hdr(xdr, OP_LOCKU);
4231 4232
	if (status != -EIO)
		nfs_increment_lock_seqid(status, res->seqid);
4233 4234
	if (status == 0)
		status = decode_stateid(xdr, &res->stateid);
L
Linus Torvalds 已提交
4235 4236 4237
	return status;
}

4238 4239 4240 4241 4242
static int decode_release_lockowner(struct xdr_stream *xdr)
{
	return decode_op_hdr(xdr, OP_RELEASE_LOCKOWNER);
}

L
Linus Torvalds 已提交
4243 4244 4245 4246 4247 4248 4249 4250
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
4251
	__be32 *p;
L
Linus Torvalds 已提交
4252 4253
	uint32_t limit_type, nblocks, blocksize;

B
Benny Halevy 已提交
4254 4255 4256
	p = xdr_inline_decode(xdr, 12);
	if (unlikely(!p))
		goto out_overflow;
B
Benny Halevy 已提交
4257
	limit_type = be32_to_cpup(p++);
L
Linus Torvalds 已提交
4258
	switch (limit_type) {
A
Andy Adamson 已提交
4259
	case 1:
4260
		xdr_decode_hyper(p, maxsize);
A
Andy Adamson 已提交
4261 4262
		break;
	case 2:
B
Benny Halevy 已提交
4263
		nblocks = be32_to_cpup(p++);
4264
		blocksize = be32_to_cpup(p);
A
Andy Adamson 已提交
4265
		*maxsize = (uint64_t)nblocks * (uint64_t)blocksize;
L
Linus Torvalds 已提交
4266 4267
	}
	return 0;
B
Benny Halevy 已提交
4268 4269 4270
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
L
Linus Torvalds 已提交
4271 4272 4273 4274
}

static int decode_delegation(struct xdr_stream *xdr, struct nfs_openres *res)
{
A
Andy Adamson 已提交
4275 4276
	__be32 *p;
	uint32_t delegation_type;
4277
	int status;
L
Linus Torvalds 已提交
4278

B
Benny Halevy 已提交
4279 4280 4281
	p = xdr_inline_decode(xdr, 4);
	if (unlikely(!p))
		goto out_overflow;
4282
	delegation_type = be32_to_cpup(p);
L
Linus Torvalds 已提交
4283 4284 4285 4286
	if (delegation_type == NFS4_OPEN_DELEGATE_NONE) {
		res->delegation_type = 0;
		return 0;
	}
4287 4288 4289
	status = decode_stateid(xdr, &res->delegation);
	if (unlikely(status))
		return status;
B
Benny Halevy 已提交
4290 4291 4292
	p = xdr_inline_decode(xdr, 4);
	if (unlikely(!p))
		goto out_overflow;
4293
	res->do_recall = be32_to_cpup(p);
A
Andy Adamson 已提交
4294

L
Linus Torvalds 已提交
4295
	switch (delegation_type) {
A
Andy Adamson 已提交
4296 4297 4298 4299 4300 4301
	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
4302 4303
				return -EIO;
	}
4304
	return decode_ace(xdr, NULL, res->server->nfs_client);
B
Benny Halevy 已提交
4305 4306 4307
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
L
Linus Torvalds 已提交
4308 4309 4310 4311
}

static int decode_open(struct xdr_stream *xdr, struct nfs_openres *res)
{
A
Andy Adamson 已提交
4312
	__be32 *p;
4313
	uint32_t savewords, bmlen, i;
A
Andy Adamson 已提交
4314
	int status;
L
Linus Torvalds 已提交
4315

A
Andy Adamson 已提交
4316
	status = decode_op_hdr(xdr, OP_OPEN);
4317 4318
	if (status != -EIO)
		nfs_increment_open_seqid(status, res->seqid);
4319 4320 4321
	if (!status)
		status = decode_stateid(xdr, &res->stateid);
	if (unlikely(status))
A
Andy Adamson 已提交
4322
		return status;
L
Linus Torvalds 已提交
4323

A
Andy Adamson 已提交
4324
	decode_change_info(xdr, &res->cinfo);
L
Linus Torvalds 已提交
4325

B
Benny Halevy 已提交
4326 4327 4328
	p = xdr_inline_decode(xdr, 8);
	if (unlikely(!p))
		goto out_overflow;
B
Benny Halevy 已提交
4329
	res->rflags = be32_to_cpup(p++);
4330
	bmlen = be32_to_cpup(p);
A
Andy Adamson 已提交
4331 4332
	if (bmlen > 10)
		goto xdr_error;
L
Linus Torvalds 已提交
4333

B
Benny Halevy 已提交
4334 4335 4336
	p = xdr_inline_decode(xdr, bmlen << 2);
	if (unlikely(!p))
		goto out_overflow;
4337 4338
	savewords = min_t(uint32_t, bmlen, NFS4_BITMAP_SIZE);
	for (i = 0; i < savewords; ++i)
B
Benny Halevy 已提交
4339
		res->attrset[i] = be32_to_cpup(p++);
4340 4341 4342
	for (; i < NFS4_BITMAP_SIZE; i++)
		res->attrset[i] = 0;

L
Linus Torvalds 已提交
4343 4344
	return decode_delegation(xdr, res);
xdr_error:
4345
	dprintk("%s: Bitmap too large! Length = %u\n", __func__, bmlen);
L
Linus Torvalds 已提交
4346
	return -EIO;
B
Benny Halevy 已提交
4347 4348 4349
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
L
Linus Torvalds 已提交
4350 4351 4352 4353 4354 4355
}

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

A
Andy Adamson 已提交
4356
	status = decode_op_hdr(xdr, OP_OPEN_CONFIRM);
4357 4358
	if (status != -EIO)
		nfs_increment_open_seqid(status, res->seqid);
4359 4360 4361
	if (!status)
		status = decode_stateid(xdr, &res->stateid);
	return status;
L
Linus Torvalds 已提交
4362 4363 4364 4365 4366 4367 4368
}

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

	status = decode_op_hdr(xdr, OP_OPEN_DOWNGRADE);
4369 4370
	if (status != -EIO)
		nfs_increment_open_seqid(status, res->seqid);
4371 4372 4373
	if (!status)
		status = decode_stateid(xdr, &res->stateid);
	return status;
L
Linus Torvalds 已提交
4374 4375 4376 4377 4378 4379 4380 4381 4382 4383 4384 4385 4386 4387 4388
}

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
4389
	__be32 *p;
L
Linus Torvalds 已提交
4390 4391 4392 4393 4394 4395
	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
4396 4397 4398
	p = xdr_inline_decode(xdr, 8);
	if (unlikely(!p))
		goto out_overflow;
B
Benny Halevy 已提交
4399
	eof = be32_to_cpup(p++);
4400
	count = be32_to_cpup(p);
4401
	hdrlen = (u8 *) xdr->p - (u8 *) iov->iov_base;
L
Linus Torvalds 已提交
4402 4403
	recvd = req->rq_rcv_buf.len - hdrlen;
	if (count > recvd) {
4404
		dprintk("NFS: server cheating in read reply: "
L
Linus Torvalds 已提交
4405 4406 4407 4408 4409 4410 4411 4412
				"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
4413 4414 4415
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
L
Linus Torvalds 已提交
4416 4417 4418 4419 4420 4421
}

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;
4422 4423 4424
	size_t		hdrlen;
	u32		recvd, pglen = rcvbuf->page_len;
	int		status;
L
Linus Torvalds 已提交
4425 4426

	status = decode_op_hdr(xdr, OP_READDIR);
4427 4428 4429
	if (!status)
		status = decode_verifier(xdr, readdir->verifier.data);
	if (unlikely(status))
L
Linus Torvalds 已提交
4430
		return status;
4431 4432
	dprintk("%s: verifier = %08x:%08x\n",
			__func__,
4433 4434 4435
			((u32 *)readdir->verifier.data)[0],
			((u32 *)readdir->verifier.data)[1]);

L
Linus Torvalds 已提交
4436

4437
	hdrlen = (char *) xdr->p - (char *) iov->iov_base;
L
Linus Torvalds 已提交
4438 4439 4440 4441 4442
	recvd = rcvbuf->len - hdrlen;
	if (pglen > recvd)
		pglen = recvd;
	xdr_read_pages(xdr, pglen);

4443

4444
	return pglen;
L
Linus Torvalds 已提交
4445 4446 4447 4448 4449 4450
}

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;
4451 4452
	size_t hdrlen;
	u32 len, recvd;
A
Al Viro 已提交
4453
	__be32 *p;
L
Linus Torvalds 已提交
4454 4455 4456 4457 4458 4459 4460
	int status;

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

	/* Convert length of symlink */
B
Benny Halevy 已提交
4461 4462 4463
	p = xdr_inline_decode(xdr, 4);
	if (unlikely(!p))
		goto out_overflow;
4464
	len = be32_to_cpup(p);
L
Linus Torvalds 已提交
4465
	if (len >= rcvbuf->page_len || len <= 0) {
4466
		dprintk("nfs: server returned giant symlink!\n");
L
Linus Torvalds 已提交
4467 4468 4469 4470 4471
		return -ENAMETOOLONG;
	}
	hdrlen = (char *) xdr->p - (char *) iov->iov_base;
	recvd = req->rq_rcv_buf.len - hdrlen;
	if (recvd < len) {
4472
		dprintk("NFS: server cheating in readlink reply: "
L
Linus Torvalds 已提交
4473 4474 4475 4476 4477 4478 4479 4480 4481 4482 4483
				"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).
	 */
4484
	xdr_terminate_string(rcvbuf, len);
L
Linus Torvalds 已提交
4485
	return 0;
B
Benny Halevy 已提交
4486 4487 4488
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
L
Linus Torvalds 已提交
4489 4490 4491 4492 4493 4494 4495 4496 4497 4498 4499 4500 4501 4502 4503 4504 4505 4506 4507 4508 4509 4510 4511 4512 4513 4514 4515 4516 4517 4518 4519 4520 4521 4522
}

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);
}

4523 4524 4525 4526 4527 4528
static int
decode_restorefh(struct xdr_stream *xdr)
{
	return decode_op_hdr(xdr, OP_RESTOREFH);
}

4529 4530 4531
static int decode_getacl(struct xdr_stream *xdr, struct rpc_rqst *req,
		size_t *acl_len)
{
A
Al Viro 已提交
4532
	__be32 *savep;
4533 4534 4535 4536 4537 4538 4539 4540 4541 4542 4543 4544 4545 4546 4547 4548
	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)) {
4549 4550
		size_t hdrlen;
		u32 recvd;
4551 4552 4553 4554 4555 4556

		/* 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) {
4557
			dprintk("NFS: server cheating in getattr"
4558 4559 4560 4561
					" acl reply: attrlen %u > recvd %u\n",
					attrlen, recvd);
			return -EINVAL;
		}
4562
		xdr_read_pages(xdr, attrlen);
4563
		*acl_len = attrlen;
J
J. Bruce Fields 已提交
4564 4565
	} else
		status = -EOPNOTSUPP;
4566 4567 4568 4569 4570

out:
	return status;
}

L
Linus Torvalds 已提交
4571 4572 4573 4574 4575 4576
static int
decode_savefh(struct xdr_stream *xdr)
{
	return decode_op_hdr(xdr, OP_SAVEFH);
}

4577
static int decode_setattr(struct xdr_stream *xdr)
L
Linus Torvalds 已提交
4578
{
A
Al Viro 已提交
4579
	__be32 *p;
L
Linus Torvalds 已提交
4580 4581 4582 4583 4584 4585
	uint32_t bmlen;
	int status;

	status = decode_op_hdr(xdr, OP_SETATTR);
	if (status)
		return status;
B
Benny Halevy 已提交
4586 4587 4588
	p = xdr_inline_decode(xdr, 4);
	if (unlikely(!p))
		goto out_overflow;
4589
	bmlen = be32_to_cpup(p);
B
Benny Halevy 已提交
4590 4591 4592 4593 4594 4595
	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
4596 4597
}

4598
static int decode_setclientid(struct xdr_stream *xdr, struct nfs4_setclientid_res *res)
L
Linus Torvalds 已提交
4599
{
A
Al Viro 已提交
4600
	__be32 *p;
L
Linus Torvalds 已提交
4601 4602 4603
	uint32_t opnum;
	int32_t nfserr;

B
Benny Halevy 已提交
4604 4605 4606
	p = xdr_inline_decode(xdr, 8);
	if (unlikely(!p))
		goto out_overflow;
B
Benny Halevy 已提交
4607
	opnum = be32_to_cpup(p++);
L
Linus Torvalds 已提交
4608
	if (opnum != OP_SETCLIENTID) {
4609
		dprintk("nfs: decode_setclientid: Server returned operation"
4610
			" %d\n", opnum);
L
Linus Torvalds 已提交
4611 4612
		return -EIO;
	}
4613
	nfserr = be32_to_cpup(p);
L
Linus Torvalds 已提交
4614
	if (nfserr == NFS_OK) {
B
Benny Halevy 已提交
4615 4616 4617
		p = xdr_inline_decode(xdr, 8 + NFS4_VERIFIER_SIZE);
		if (unlikely(!p))
			goto out_overflow;
4618 4619
		p = xdr_decode_hyper(p, &res->clientid);
		memcpy(res->confirm.data, p, NFS4_VERIFIER_SIZE);
L
Linus Torvalds 已提交
4620 4621 4622 4623
	} else if (nfserr == NFSERR_CLID_INUSE) {
		uint32_t len;

		/* skip netid string */
B
Benny Halevy 已提交
4624 4625 4626
		p = xdr_inline_decode(xdr, 4);
		if (unlikely(!p))
			goto out_overflow;
4627
		len = be32_to_cpup(p);
B
Benny Halevy 已提交
4628 4629 4630
		p = xdr_inline_decode(xdr, len);
		if (unlikely(!p))
			goto out_overflow;
L
Linus Torvalds 已提交
4631 4632

		/* skip uaddr string */
B
Benny Halevy 已提交
4633 4634 4635
		p = xdr_inline_decode(xdr, 4);
		if (unlikely(!p))
			goto out_overflow;
4636
		len = be32_to_cpup(p);
B
Benny Halevy 已提交
4637 4638 4639
		p = xdr_inline_decode(xdr, len);
		if (unlikely(!p))
			goto out_overflow;
L
Linus Torvalds 已提交
4640 4641
		return -NFSERR_CLID_INUSE;
	} else
4642
		return nfs4_stat_to_errno(nfserr);
L
Linus Torvalds 已提交
4643 4644

	return 0;
B
Benny Halevy 已提交
4645 4646 4647
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
L
Linus Torvalds 已提交
4648 4649 4650 4651 4652 4653 4654 4655 4656
}

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
4657
	__be32 *p;
L
Linus Torvalds 已提交
4658 4659 4660 4661 4662 4663
	int status;

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

B
Benny Halevy 已提交
4664 4665 4666
	p = xdr_inline_decode(xdr, 16);
	if (unlikely(!p))
		goto out_overflow;
B
Benny Halevy 已提交
4667 4668
	res->count = be32_to_cpup(p++);
	res->verf->committed = be32_to_cpup(p++);
B
Benny Halevy 已提交
4669
	memcpy(res->verf->verifier, p, 8);
L
Linus Torvalds 已提交
4670
	return 0;
B
Benny Halevy 已提交
4671 4672 4673
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
L
Linus Torvalds 已提交
4674 4675 4676 4677 4678 4679 4680
}

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

B
Benny Halevy 已提交
4681 4682 4683 4684 4685 4686
#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;
4687
	char *dummy_str;
B
Benny Halevy 已提交
4688 4689 4690 4691 4692 4693 4694
	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
4695 4696 4697
	p = xdr_inline_decode(xdr, 8);
	if (unlikely(!p))
		goto out_overflow;
4698
	xdr_decode_hyper(p, &clp->cl_ex_clid);
B
Benny Halevy 已提交
4699 4700 4701
	p = xdr_inline_decode(xdr, 12);
	if (unlikely(!p))
		goto out_overflow;
B
Benny Halevy 已提交
4702 4703
	clp->cl_seqid = be32_to_cpup(p++);
	clp->cl_exchange_flags = be32_to_cpup(p++);
B
Benny Halevy 已提交
4704 4705

	/* We ask for SP4_NONE */
4706
	dummy = be32_to_cpup(p);
B
Benny Halevy 已提交
4707 4708 4709 4710
	if (dummy != SP4_NONE)
		return -EIO;

	/* Throw away minor_id */
B
Benny Halevy 已提交
4711 4712 4713
	p = xdr_inline_decode(xdr, 8);
	if (unlikely(!p))
		goto out_overflow;
B
Benny Halevy 已提交
4714 4715

	/* Throw away Major id */
4716 4717 4718
	status = decode_opaque_inline(xdr, &dummy, &dummy_str);
	if (unlikely(status))
		return status;
B
Benny Halevy 已提交
4719 4720

	/* Throw away server_scope */
4721 4722 4723
	status = decode_opaque_inline(xdr, &dummy, &dummy_str);
	if (unlikely(status))
		return status;
B
Benny Halevy 已提交
4724 4725

	/* Throw away Implementation id array */
4726 4727 4728
	status = decode_opaque_inline(xdr, &dummy, &dummy_str);
	if (unlikely(status))
		return status;
B
Benny Halevy 已提交
4729 4730

	return 0;
B
Benny Halevy 已提交
4731 4732 4733
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
B
Benny Halevy 已提交
4734
}
A
Andy Adamson 已提交
4735 4736 4737 4738 4739 4740 4741

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
4742 4743 4744
	p = xdr_inline_decode(xdr, 28);
	if (unlikely(!p))
		goto out_overflow;
B
Benny Halevy 已提交
4745 4746 4747 4748 4749 4750
	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++);
4751
	nr_attrs = be32_to_cpup(p);
A
Andy Adamson 已提交
4752 4753 4754 4755 4756
	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
4757 4758 4759 4760 4761
	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
4762
	return 0;
B
Benny Halevy 已提交
4763 4764 4765
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
A
Andy Adamson 已提交
4766 4767
}

4768 4769 4770
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
4771 4772 4773 4774 4775 4776 4777 4778 4779 4780 4781
}

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);
4782 4783 4784
	if (!status)
		status = decode_sessionid(xdr, &session->sess_id);
	if (unlikely(status))
A
Andy Adamson 已提交
4785 4786 4787
		return status;

	/* seqid, flags */
B
Benny Halevy 已提交
4788 4789 4790
	p = xdr_inline_decode(xdr, 8);
	if (unlikely(!p))
		goto out_overflow;
B
Benny Halevy 已提交
4791
	clp->cl_seqid = be32_to_cpup(p++);
4792
	session->flags = be32_to_cpup(p);
A
Andy Adamson 已提交
4793 4794 4795 4796 4797 4798

	/* 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
4799 4800 4801
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
A
Andy Adamson 已提交
4802
}
A
Andy Adamson 已提交
4803 4804 4805 4806 4807

static int decode_destroy_session(struct xdr_stream *xdr, void *dummy)
{
	return decode_op_hdr(xdr, OP_DESTROY_SESSION);
}
4808 4809 4810 4811 4812

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
4813 4814
#endif /* CONFIG_NFS_V4_1 */

4815 4816 4817 4818 4819
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
4820 4821 4822 4823 4824
	struct nfs4_sessionid id;
	u32 dummy;
	int status;
	__be32 *p;

4825 4826 4827
	if (!res->sr_session)
		return 0;

A
Andy Adamson 已提交
4828
	status = decode_op_hdr(xdr, OP_SEQUENCE);
4829 4830 4831
	if (!status)
		status = decode_sessionid(xdr, &id);
	if (unlikely(status))
A
Andy Adamson 已提交
4832
		goto out_err;
4833

A
Andy Adamson 已提交
4834 4835 4836 4837
	/*
	 * If the server returns different values for sessionID, slotID or
	 * sequence number, the server is looney tunes.
	 */
4838
	status = -EREMOTEIO;
A
Andy Adamson 已提交
4839 4840 4841 4842 4843 4844

	if (memcmp(id.data, res->sr_session->sess_id.data,
		   NFS4_MAX_SESSIONID_LEN)) {
		dprintk("%s Invalid session id\n", __func__);
		goto out_err;
	}
4845

B
Benny Halevy 已提交
4846 4847 4848
	p = xdr_inline_decode(xdr, 20);
	if (unlikely(!p))
		goto out_overflow;
4849

A
Andy Adamson 已提交
4850
	/* seqid */
B
Benny Halevy 已提交
4851
	dummy = be32_to_cpup(p++);
4852
	if (dummy != res->sr_slot->seq_nr) {
A
Andy Adamson 已提交
4853 4854 4855 4856
		dprintk("%s Invalid sequence number\n", __func__);
		goto out_err;
	}
	/* slot id */
B
Benny Halevy 已提交
4857
	dummy = be32_to_cpup(p++);
4858
	if (dummy != res->sr_slot - res->sr_session->fc_slot_table.slots) {
A
Andy Adamson 已提交
4859 4860 4861 4862
		dprintk("%s Invalid slot id\n", __func__);
		goto out_err;
	}
	/* highest slot id - currently not processed */
B
Benny Halevy 已提交
4863
	dummy = be32_to_cpup(p++);
A
Andy Adamson 已提交
4864
	/* target highest slot id - currently not processed */
B
Benny Halevy 已提交
4865
	dummy = be32_to_cpup(p++);
4866 4867
	/* result flags */
	res->sr_status_flags = be32_to_cpup(p);
A
Andy Adamson 已提交
4868 4869 4870 4871
	status = 0;
out_err:
	res->sr_status = status;
	return status;
B
Benny Halevy 已提交
4872 4873 4874 4875
out_overflow:
	print_overflow_msg(__func__, xdr);
	status = -EIO;
	goto out_err;
A
Andy Adamson 已提交
4876
#else  /* CONFIG_NFS_V4_1 */
4877
	return 0;
A
Andy Adamson 已提交
4878
#endif /* CONFIG_NFS_V4_1 */
4879 4880
}

4881 4882 4883 4884 4885 4886 4887 4888 4889 4890 4891 4892 4893 4894 4895 4896 4897 4898 4899 4900 4901 4902 4903 4904 4905 4906 4907 4908 4909 4910 4911 4912 4913 4914 4915 4916 4917 4918 4919 4920 4921 4922 4923 4924 4925
#if defined(CONFIG_NFS_V4_1)

static int decode_getdeviceinfo(struct xdr_stream *xdr,
				struct pnfs_device *pdev)
{
	__be32 *p;
	uint32_t len, type;
	int status;

	status = decode_op_hdr(xdr, OP_GETDEVICEINFO);
	if (status) {
		if (status == -ETOOSMALL) {
			p = xdr_inline_decode(xdr, 4);
			if (unlikely(!p))
				goto out_overflow;
			pdev->mincount = be32_to_cpup(p);
			dprintk("%s: Min count too small. mincnt = %u\n",
				__func__, pdev->mincount);
		}
		return status;
	}

	p = xdr_inline_decode(xdr, 8);
	if (unlikely(!p))
		goto out_overflow;
	type = be32_to_cpup(p++);
	if (type != pdev->layout_type) {
		dprintk("%s: layout mismatch req: %u pdev: %u\n",
			__func__, pdev->layout_type, type);
		return -EINVAL;
	}
	/*
	 * Get the length of the opaque device_addr4. xdr_read_pages places
	 * the opaque device_addr4 in the xdr_buf->pages (pnfs_device->pages)
	 * and places the remaining xdr data in xdr_buf->tail
	 */
	pdev->mincount = be32_to_cpup(p);
	xdr_read_pages(xdr, pdev->mincount); /* include space for the length */

	/* Parse notification bitmap, verifying that it is zero. */
	p = xdr_inline_decode(xdr, 4);
	if (unlikely(!p))
		goto out_overflow;
	len = be32_to_cpup(p);
	if (len) {
4926
		uint32_t i;
4927 4928 4929 4930 4931 4932 4933 4934 4935 4936 4937 4938 4939 4940 4941 4942 4943 4944 4945 4946 4947 4948 4949 4950 4951 4952 4953 4954 4955 4956 4957 4958 4959 4960 4961 4962 4963 4964 4965 4966 4967 4968 4969 4970 4971 4972 4973 4974 4975 4976 4977 4978 4979 4980 4981 4982 4983 4984 4985 4986 4987 4988 4989 4990 4991 4992 4993 4994 4995 4996 4997 4998 4999 5000 5001 5002 5003 5004 5005 5006 5007 5008

		p = xdr_inline_decode(xdr, 4 * len);
		if (unlikely(!p))
			goto out_overflow;
		for (i = 0; i < len; i++, p++) {
			if (be32_to_cpup(p)) {
				dprintk("%s: notifications not supported\n",
					__func__);
				return -EIO;
			}
		}
	}
	return 0;
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
}

static int decode_layoutget(struct xdr_stream *xdr, struct rpc_rqst *req,
			    struct nfs4_layoutget_res *res)
{
	__be32 *p;
	int status;
	u32 layout_count;

	status = decode_op_hdr(xdr, OP_LAYOUTGET);
	if (status)
		return status;
	p = xdr_inline_decode(xdr, 8 + NFS4_STATEID_SIZE);
	if (unlikely(!p))
		goto out_overflow;
	res->return_on_close = be32_to_cpup(p++);
	p = xdr_decode_opaque_fixed(p, res->stateid.data, NFS4_STATEID_SIZE);
	layout_count = be32_to_cpup(p);
	if (!layout_count) {
		dprintk("%s: server responded with empty layout array\n",
			__func__);
		return -EINVAL;
	}

	p = xdr_inline_decode(xdr, 24);
	if (unlikely(!p))
		goto out_overflow;
	p = xdr_decode_hyper(p, &res->range.offset);
	p = xdr_decode_hyper(p, &res->range.length);
	res->range.iomode = be32_to_cpup(p++);
	res->type = be32_to_cpup(p++);

	status = decode_opaque_inline(xdr, &res->layout.len, (char **)&p);
	if (unlikely(status))
		return status;

	dprintk("%s roff:%lu rlen:%lu riomode:%d, lo_type:0x%x, lo.len:%d\n",
		__func__,
		(unsigned long)res->range.offset,
		(unsigned long)res->range.length,
		res->range.iomode,
		res->type,
		res->layout.len);

	/* nfs4_proc_layoutget allocated a single page */
	if (res->layout.len > PAGE_SIZE)
		return -ENOMEM;
	memcpy(res->layout.buf, p, res->layout.len);

	if (layout_count > 1) {
		/* We only handle a length one array at the moment.  Any
		 * further entries are just ignored.  Note that this means
		 * the client may see a response that is less than the
		 * minimum it requested.
		 */
		dprintk("%s: server responded with %d layouts, dropping tail\n",
			__func__, layout_count);
	}

	return 0;
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
}
#endif /* CONFIG_NFS_V4_1 */

5009 5010 5011 5012
/*
 * END OF "GENERIC" DECODE ROUTINES.
 */

L
Linus Torvalds 已提交
5013 5014 5015
/*
 * Decode OPEN_DOWNGRADE response
 */
A
Al Viro 已提交
5016
static int nfs4_xdr_dec_open_downgrade(struct rpc_rqst *rqstp, __be32 *p, struct nfs_closeres *res)
L
Linus Torvalds 已提交
5017
{
A
Andy Adamson 已提交
5018 5019 5020 5021 5022 5023
	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);
5024 5025 5026
	if (status)
		goto out;
	status = decode_sequence(&xdr, &res->seq_res, rqstp);
A
Andy Adamson 已提交
5027 5028 5029 5030 5031 5032
	if (status)
		goto out;
	status = decode_putfh(&xdr);
	if (status)
		goto out;
	status = decode_open_downgrade(&xdr, res);
5033 5034
	if (status != 0)
		goto out;
5035 5036
	decode_getfattr(&xdr, res->fattr, res->server,
			!RPC_IS_ASYNC(rqstp->rq_task));
L
Linus Torvalds 已提交
5037
out:
A
Andy Adamson 已提交
5038
	return status;
L
Linus Torvalds 已提交
5039 5040 5041 5042 5043
}

/*
 * Decode ACCESS response
 */
A
Al Viro 已提交
5044
static int nfs4_xdr_dec_access(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_accessres *res)
L
Linus Torvalds 已提交
5045 5046 5047 5048
{
	struct xdr_stream xdr;
	struct compound_hdr hdr;
	int status;
5049

L
Linus Torvalds 已提交
5050
	xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5051 5052 5053 5054 5055
	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
5056
		goto out;
5057 5058 5059 5060 5061 5062
	status = decode_putfh(&xdr);
	if (status != 0)
		goto out;
	status = decode_access(&xdr, res);
	if (status != 0)
		goto out;
5063 5064
	decode_getfattr(&xdr, res->fattr, res->server,
			!RPC_IS_ASYNC(rqstp->rq_task));
L
Linus Torvalds 已提交
5065 5066 5067 5068 5069 5070 5071
out:
	return status;
}

/*
 * Decode LOOKUP response
 */
A
Al Viro 已提交
5072
static int nfs4_xdr_dec_lookup(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_lookup_res *res)
L
Linus Torvalds 已提交
5073 5074 5075 5076
{
	struct xdr_stream xdr;
	struct compound_hdr hdr;
	int status;
5077

L
Linus Torvalds 已提交
5078
	xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5079 5080 5081 5082 5083
	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
5084 5085 5086 5087 5088 5089 5090
		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;
5091 5092
	status = decode_getfattr(&xdr, res->fattr, res->server
			,!RPC_IS_ASYNC(rqstp->rq_task));
L
Linus Torvalds 已提交
5093 5094 5095 5096 5097 5098 5099
out:
	return status;
}

/*
 * Decode LOOKUP_ROOT response
 */
A
Al Viro 已提交
5100
static int nfs4_xdr_dec_lookup_root(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_lookup_res *res)
L
Linus Torvalds 已提交
5101 5102 5103 5104
{
	struct xdr_stream xdr;
	struct compound_hdr hdr;
	int status;
5105

L
Linus Torvalds 已提交
5106
	xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5107 5108 5109 5110 5111
	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
5112 5113 5114 5115
		goto out;
	if ((status = decode_putrootfh(&xdr)) != 0)
		goto out;
	if ((status = decode_getfh(&xdr, res->fh)) == 0)
5116 5117
		status = decode_getfattr(&xdr, res->fattr, res->server,
				!RPC_IS_ASYNC(rqstp->rq_task));
L
Linus Torvalds 已提交
5118 5119 5120 5121 5122 5123 5124
out:
	return status;
}

/*
 * Decode REMOVE response
 */
5125
static int nfs4_xdr_dec_remove(struct rpc_rqst *rqstp, __be32 *p, struct nfs_removeres *res)
L
Linus Torvalds 已提交
5126 5127 5128 5129
{
	struct xdr_stream xdr;
	struct compound_hdr hdr;
	int status;
5130

L
Linus Torvalds 已提交
5131
	xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5132 5133 5134 5135 5136
	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
5137
		goto out;
5138 5139 5140 5141
	if ((status = decode_putfh(&xdr)) != 0)
		goto out;
	if ((status = decode_remove(&xdr, &res->cinfo)) != 0)
		goto out;
5142
	decode_getfattr(&xdr, res->dir_attr, res->server,
5143
			!RPC_IS_ASYNC(rqstp->rq_task));
L
Linus Torvalds 已提交
5144 5145 5146 5147 5148 5149 5150
out:
	return status;
}

/*
 * Decode RENAME response
 */
5151
static int nfs4_xdr_dec_rename(struct rpc_rqst *rqstp, __be32 *p, struct nfs_renameres *res)
L
Linus Torvalds 已提交
5152 5153 5154 5155
{
	struct xdr_stream xdr;
	struct compound_hdr hdr;
	int status;
5156

L
Linus Torvalds 已提交
5157
	xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5158 5159 5160 5161 5162
	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
5163 5164 5165 5166 5167 5168 5169
		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;
5170 5171 5172
	if ((status = decode_rename(&xdr, &res->old_cinfo, &res->new_cinfo)) != 0)
		goto out;
	/* Current FH is target directory */
5173 5174
	if (decode_getfattr(&xdr, res->new_fattr, res->server,
				!RPC_IS_ASYNC(rqstp->rq_task)) != 0)
5175 5176 5177
		goto out;
	if ((status = decode_restorefh(&xdr)) != 0)
		goto out;
5178 5179
	decode_getfattr(&xdr, res->old_fattr, res->server,
			!RPC_IS_ASYNC(rqstp->rq_task));
L
Linus Torvalds 已提交
5180 5181 5182 5183 5184 5185 5186
out:
	return status;
}

/*
 * Decode LINK response
 */
A
Al Viro 已提交
5187
static int nfs4_xdr_dec_link(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_link_res *res)
L
Linus Torvalds 已提交
5188 5189 5190 5191
{
	struct xdr_stream xdr;
	struct compound_hdr hdr;
	int status;
5192

L
Linus Torvalds 已提交
5193
	xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5194 5195 5196 5197 5198
	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
5199 5200 5201 5202 5203 5204 5205
		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;
5206 5207 5208 5209 5210 5211
	if ((status = decode_link(&xdr, &res->cinfo)) != 0)
		goto out;
	/*
	 * Note order: OP_LINK leaves the directory as the current
	 *             filehandle.
	 */
5212 5213
	if (decode_getfattr(&xdr, res->dir_attr, res->server,
				!RPC_IS_ASYNC(rqstp->rq_task)) != 0)
5214 5215 5216
		goto out;
	if ((status = decode_restorefh(&xdr)) != 0)
		goto out;
5217 5218
	decode_getfattr(&xdr, res->fattr, res->server,
			!RPC_IS_ASYNC(rqstp->rq_task));
L
Linus Torvalds 已提交
5219 5220 5221 5222 5223 5224 5225
out:
	return status;
}

/*
 * Decode CREATE response
 */
A
Al Viro 已提交
5226
static int nfs4_xdr_dec_create(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_create_res *res)
L
Linus Torvalds 已提交
5227 5228 5229 5230
{
	struct xdr_stream xdr;
	struct compound_hdr hdr;
	int status;
5231

L
Linus Torvalds 已提交
5232
	xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5233 5234 5235 5236 5237
	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
5238 5239 5240
		goto out;
	if ((status = decode_putfh(&xdr)) != 0)
		goto out;
5241 5242
	if ((status = decode_savefh(&xdr)) != 0)
		goto out;
L
Linus Torvalds 已提交
5243 5244 5245 5246
	if ((status = decode_create(&xdr,&res->dir_cinfo)) != 0)
		goto out;
	if ((status = decode_getfh(&xdr, res->fh)) != 0)
		goto out;
5247 5248
	if (decode_getfattr(&xdr, res->fattr, res->server,
				!RPC_IS_ASYNC(rqstp->rq_task)) != 0)
5249 5250 5251
		goto out;
	if ((status = decode_restorefh(&xdr)) != 0)
		goto out;
5252 5253
	decode_getfattr(&xdr, res->dir_fattr, res->server,
			!RPC_IS_ASYNC(rqstp->rq_task));
L
Linus Torvalds 已提交
5254 5255 5256 5257 5258 5259 5260
out:
	return status;
}

/*
 * Decode SYMLINK response
 */
A
Al Viro 已提交
5261
static int nfs4_xdr_dec_symlink(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_create_res *res)
L
Linus Torvalds 已提交
5262 5263 5264 5265 5266 5267 5268
{
	return nfs4_xdr_dec_create(rqstp, p, res);
}

/*
 * Decode GETATTR response
 */
A
Al Viro 已提交
5269
static int nfs4_xdr_dec_getattr(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_getattr_res *res)
L
Linus Torvalds 已提交
5270 5271 5272 5273
{
	struct xdr_stream xdr;
	struct compound_hdr hdr;
	int status;
5274

L
Linus Torvalds 已提交
5275 5276
	xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
	status = decode_compound_hdr(&xdr, &hdr);
5277 5278 5279
	if (status)
		goto out;
	status = decode_sequence(&xdr, &res->seq_res, rqstp);
L
Linus Torvalds 已提交
5280 5281 5282 5283 5284
	if (status)
		goto out;
	status = decode_putfh(&xdr);
	if (status)
		goto out;
5285 5286
	status = decode_getfattr(&xdr, res->fattr, res->server,
			!RPC_IS_ASYNC(rqstp->rq_task));
L
Linus Torvalds 已提交
5287 5288 5289 5290
out:
	return status;
}

5291 5292 5293
/*
 * Encode an SETACL request
 */
5294 5295
static void nfs4_xdr_enc_setacl(struct rpc_rqst *req, struct xdr_stream *xdr,
				struct nfs_setaclargs *args)
5296
{
A
Andy Adamson 已提交
5297
	struct compound_hdr hdr = {
5298
		.minorversion = nfs4_xdr_minorversion(&args->seq_args),
A
Andy Adamson 已提交
5299 5300
	};

5301 5302 5303 5304
	encode_compound_hdr(xdr, req, &hdr);
	encode_sequence(xdr, &args->seq_args, &hdr);
	encode_putfh(xdr, args->fh, &hdr);
	encode_setacl(xdr, args, &hdr);
5305
	encode_nops(&hdr);
5306
}
A
Andy Adamson 已提交
5307

5308 5309 5310 5311
/*
 * Decode SETACL response
 */
static int
B
Benny Halevy 已提交
5312 5313
nfs4_xdr_dec_setacl(struct rpc_rqst *rqstp, __be32 *p,
		    struct nfs_setaclres *res)
5314 5315 5316 5317 5318 5319 5320
{
	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);
5321 5322 5323
	if (status)
		goto out;
	status = decode_sequence(&xdr, &res->seq_res, rqstp);
5324 5325 5326 5327 5328
	if (status)
		goto out;
	status = decode_putfh(&xdr);
	if (status)
		goto out;
5329
	status = decode_setattr(&xdr);
5330 5331 5332
out:
	return status;
}
L
Linus Torvalds 已提交
5333

5334 5335 5336 5337
/*
 * Decode GETACL response
 */
static int
B
Benny Halevy 已提交
5338 5339
nfs4_xdr_dec_getacl(struct rpc_rqst *rqstp, __be32 *p,
		    struct nfs_getaclres *res)
5340 5341 5342 5343 5344 5345 5346
{
	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);
5347 5348 5349
	if (status)
		goto out;
	status = decode_sequence(&xdr, &res->seq_res, rqstp);
5350 5351 5352 5353 5354
	if (status)
		goto out;
	status = decode_putfh(&xdr);
	if (status)
		goto out;
B
Benny Halevy 已提交
5355
	status = decode_getacl(&xdr, rqstp, &res->acl_len);
5356 5357 5358 5359 5360

out:
	return status;
}

L
Linus Torvalds 已提交
5361 5362 5363
/*
 * Decode CLOSE response
 */
A
Al Viro 已提交
5364
static int nfs4_xdr_dec_close(struct rpc_rqst *rqstp, __be32 *p, struct nfs_closeres *res)
L
Linus Torvalds 已提交
5365
{
A
Andy Adamson 已提交
5366 5367 5368 5369 5370 5371
	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);
5372 5373 5374
	if (status)
		goto out;
	status = decode_sequence(&xdr, &res->seq_res, rqstp);
A
Andy Adamson 已提交
5375 5376 5377 5378 5379 5380
	if (status)
		goto out;
	status = decode_putfh(&xdr);
	if (status)
		goto out;
	status = decode_close(&xdr, res);
5381 5382 5383 5384 5385 5386 5387 5388
	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.
	 */
5389 5390
	decode_getfattr(&xdr, res->fattr, res->server,
			!RPC_IS_ASYNC(rqstp->rq_task));
L
Linus Torvalds 已提交
5391
out:
A
Andy Adamson 已提交
5392
	return status;
L
Linus Torvalds 已提交
5393 5394 5395 5396 5397
}

/*
 * Decode OPEN response
 */
A
Al Viro 已提交
5398
static int nfs4_xdr_dec_open(struct rpc_rqst *rqstp, __be32 *p, struct nfs_openres *res)
L
Linus Torvalds 已提交
5399
{
A
Andy Adamson 已提交
5400 5401 5402 5403 5404 5405
	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);
5406 5407 5408
	if (status)
		goto out;
	status = decode_sequence(&xdr, &res->seq_res, rqstp);
A
Andy Adamson 已提交
5409 5410 5411 5412 5413 5414 5415 5416 5417
	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);
5418 5419
	if (status)
		goto out;
5420
	if (decode_getfh(&xdr, &res->fh) != 0)
L
Linus Torvalds 已提交
5421
		goto out;
5422 5423
	if (decode_getfattr(&xdr, res->f_attr, res->server,
				!RPC_IS_ASYNC(rqstp->rq_task)) != 0)
5424
		goto out;
5425
	if (decode_restorefh(&xdr) != 0)
5426
		goto out;
5427 5428
	decode_getfattr(&xdr, res->dir_attr, res->server,
			!RPC_IS_ASYNC(rqstp->rq_task));
L
Linus Torvalds 已提交
5429
out:
A
Andy Adamson 已提交
5430
	return status;
L
Linus Torvalds 已提交
5431 5432 5433 5434 5435
}

/*
 * Decode OPEN_CONFIRM response
 */
A
Al Viro 已提交
5436
static int nfs4_xdr_dec_open_confirm(struct rpc_rqst *rqstp, __be32 *p, struct nfs_open_confirmres *res)
L
Linus Torvalds 已提交
5437
{
A
Andy Adamson 已提交
5438 5439 5440 5441 5442 5443 5444 5445 5446 5447 5448 5449
	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
5450
out:
A
Andy Adamson 已提交
5451
	return status;
L
Linus Torvalds 已提交
5452 5453 5454 5455 5456
}

/*
 * Decode OPEN response
 */
A
Al Viro 已提交
5457
static int nfs4_xdr_dec_open_noattr(struct rpc_rqst *rqstp, __be32 *p, struct nfs_openres *res)
L
Linus Torvalds 已提交
5458
{
A
Andy Adamson 已提交
5459 5460 5461 5462 5463 5464
	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);
5465 5466 5467
	if (status)
		goto out;
	status = decode_sequence(&xdr, &res->seq_res, rqstp);
A
Andy Adamson 已提交
5468 5469 5470 5471 5472 5473 5474 5475
	if (status)
		goto out;
	status = decode_putfh(&xdr);
	if (status)
		goto out;
	status = decode_open(&xdr, res);
	if (status)
		goto out;
5476 5477
	decode_getfattr(&xdr, res->f_attr, res->server,
			!RPC_IS_ASYNC(rqstp->rq_task));
L
Linus Torvalds 已提交
5478
out:
A
Andy Adamson 已提交
5479
	return status;
L
Linus Torvalds 已提交
5480 5481 5482 5483 5484
}

/*
 * Decode SETATTR response
 */
A
Al Viro 已提交
5485
static int nfs4_xdr_dec_setattr(struct rpc_rqst *rqstp, __be32 *p, struct nfs_setattrres *res)
L
Linus Torvalds 已提交
5486
{
A
Andy Adamson 已提交
5487 5488 5489 5490 5491 5492
	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);
5493 5494 5495
	if (status)
		goto out;
	status = decode_sequence(&xdr, &res->seq_res, rqstp);
A
Andy Adamson 已提交
5496 5497 5498 5499 5500
	if (status)
		goto out;
	status = decode_putfh(&xdr);
	if (status)
		goto out;
5501
	status = decode_setattr(&xdr);
A
Andy Adamson 已提交
5502 5503
	if (status)
		goto out;
5504 5505
	decode_getfattr(&xdr, res->fattr, res->server,
			!RPC_IS_ASYNC(rqstp->rq_task));
L
Linus Torvalds 已提交
5506
out:
A
Andy Adamson 已提交
5507
	return status;
L
Linus Torvalds 已提交
5508 5509 5510 5511 5512
}

/*
 * Decode LOCK response
 */
A
Al Viro 已提交
5513
static int nfs4_xdr_dec_lock(struct rpc_rqst *rqstp, __be32 *p, struct nfs_lock_res *res)
L
Linus Torvalds 已提交
5514 5515 5516 5517 5518 5519 5520
{
	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);
5521 5522 5523
	if (status)
		goto out;
	status = decode_sequence(&xdr, &res->seq_res, rqstp);
L
Linus Torvalds 已提交
5524 5525 5526 5527 5528 5529 5530 5531 5532 5533 5534 5535 5536
	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
5537
static int nfs4_xdr_dec_lockt(struct rpc_rqst *rqstp, __be32 *p, struct nfs_lockt_res *res)
L
Linus Torvalds 已提交
5538 5539 5540 5541 5542 5543 5544
{
	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);
5545 5546 5547
	if (status)
		goto out;
	status = decode_sequence(&xdr, &res->seq_res, rqstp);
L
Linus Torvalds 已提交
5548 5549 5550 5551 5552 5553 5554 5555 5556 5557 5558 5559 5560
	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
5561
static int nfs4_xdr_dec_locku(struct rpc_rqst *rqstp, __be32 *p, struct nfs_locku_res *res)
L
Linus Torvalds 已提交
5562 5563 5564 5565 5566 5567 5568
{
	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);
5569 5570 5571
	if (status)
		goto out;
	status = decode_sequence(&xdr, &res->seq_res, rqstp);
L
Linus Torvalds 已提交
5572 5573 5574 5575 5576 5577 5578 5579 5580 5581
	if (status)
		goto out;
	status = decode_putfh(&xdr);
	if (status)
		goto out;
	status = decode_locku(&xdr, res);
out:
	return status;
}

5582 5583 5584 5585 5586 5587 5588 5589 5590 5591 5592 5593 5594
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
5595 5596 5597
/*
 * Decode READLINK response
 */
B
Benny Halevy 已提交
5598 5599
static int nfs4_xdr_dec_readlink(struct rpc_rqst *rqstp, __be32 *p,
				 struct nfs4_readlink_res *res)
L
Linus Torvalds 已提交
5600 5601 5602 5603 5604 5605 5606
{
	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);
5607 5608 5609
	if (status)
		goto out;
	status = decode_sequence(&xdr, &res->seq_res, rqstp);
L
Linus Torvalds 已提交
5610 5611 5612 5613 5614 5615 5616 5617 5618 5619 5620 5621 5622
	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
5623
static int nfs4_xdr_dec_readdir(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_readdir_res *res)
L
Linus Torvalds 已提交
5624 5625 5626 5627 5628 5629 5630
{
	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);
5631 5632 5633
	if (status)
		goto out;
	status = decode_sequence(&xdr, &res->seq_res, rqstp);
L
Linus Torvalds 已提交
5634 5635 5636 5637 5638 5639 5640 5641 5642 5643 5644 5645 5646
	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
5647
static int nfs4_xdr_dec_read(struct rpc_rqst *rqstp, __be32 *p, struct nfs_readres *res)
L
Linus Torvalds 已提交
5648 5649 5650 5651 5652 5653 5654
{
	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);
5655 5656 5657
	if (status)
		goto out;
	status = decode_sequence(&xdr, &res->seq_res, rqstp);
L
Linus Torvalds 已提交
5658 5659 5660 5661 5662 5663 5664 5665 5666 5667 5668 5669 5670 5671 5672
	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
5673
static int nfs4_xdr_dec_write(struct rpc_rqst *rqstp, __be32 *p, struct nfs_writeres *res)
L
Linus Torvalds 已提交
5674 5675 5676 5677 5678 5679 5680
{
	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);
5681 5682 5683
	if (status)
		goto out;
	status = decode_sequence(&xdr, &res->seq_res, rqstp);
L
Linus Torvalds 已提交
5684 5685 5686 5687 5688 5689
	if (status)
		goto out;
	status = decode_putfh(&xdr);
	if (status)
		goto out;
	status = decode_write(&xdr, res);
5690 5691
	if (status)
		goto out;
5692 5693
	decode_getfattr(&xdr, res->fattr, res->server,
			!RPC_IS_ASYNC(rqstp->rq_task));
L
Linus Torvalds 已提交
5694 5695 5696 5697 5698 5699 5700 5701 5702
	if (!status)
		status = res->count;
out:
	return status;
}

/*
 * Decode COMMIT response
 */
A
Al Viro 已提交
5703
static int nfs4_xdr_dec_commit(struct rpc_rqst *rqstp, __be32 *p, struct nfs_writeres *res)
L
Linus Torvalds 已提交
5704 5705 5706 5707 5708 5709 5710
{
	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);
5711 5712 5713
	if (status)
		goto out;
	status = decode_sequence(&xdr, &res->seq_res, rqstp);
L
Linus Torvalds 已提交
5714 5715 5716 5717 5718 5719
	if (status)
		goto out;
	status = decode_putfh(&xdr);
	if (status)
		goto out;
	status = decode_commit(&xdr, res);
5720 5721
	if (status)
		goto out;
5722 5723
	decode_getfattr(&xdr, res->fattr, res->server,
			!RPC_IS_ASYNC(rqstp->rq_task));
L
Linus Torvalds 已提交
5724 5725 5726 5727 5728
out:
	return status;
}

/*
5729
 * Decode FSINFO response
L
Linus Torvalds 已提交
5730
 */
B
Benny Halevy 已提交
5731 5732
static int nfs4_xdr_dec_fsinfo(struct rpc_rqst *req, __be32 *p,
			       struct nfs4_fsinfo_res *res)
L
Linus Torvalds 已提交
5733 5734 5735 5736 5737 5738 5739
{
	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);
5740 5741
	if (!status)
		status = decode_sequence(&xdr, &res->seq_res, req);
L
Linus Torvalds 已提交
5742 5743 5744
	if (!status)
		status = decode_putfh(&xdr);
	if (!status)
B
Benny Halevy 已提交
5745
		status = decode_fsinfo(&xdr, res->fsinfo);
L
Linus Torvalds 已提交
5746 5747 5748 5749
	return status;
}

/*
5750
 * Decode PATHCONF response
L
Linus Torvalds 已提交
5751
 */
B
Benny Halevy 已提交
5752 5753
static int nfs4_xdr_dec_pathconf(struct rpc_rqst *req, __be32 *p,
				 struct nfs4_pathconf_res *res)
L
Linus Torvalds 已提交
5754 5755 5756 5757 5758 5759 5760
{
	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);
5761 5762
	if (!status)
		status = decode_sequence(&xdr, &res->seq_res, req);
L
Linus Torvalds 已提交
5763 5764 5765
	if (!status)
		status = decode_putfh(&xdr);
	if (!status)
B
Benny Halevy 已提交
5766
		status = decode_pathconf(&xdr, res->pathconf);
L
Linus Torvalds 已提交
5767 5768 5769 5770
	return status;
}

/*
5771
 * Decode STATFS response
L
Linus Torvalds 已提交
5772
 */
B
Benny Halevy 已提交
5773 5774
static int nfs4_xdr_dec_statfs(struct rpc_rqst *req, __be32 *p,
			       struct nfs4_statfs_res *res)
L
Linus Torvalds 已提交
5775 5776 5777 5778 5779 5780 5781
{
	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);
5782 5783
	if (!status)
		status = decode_sequence(&xdr, &res->seq_res, req);
L
Linus Torvalds 已提交
5784 5785 5786
	if (!status)
		status = decode_putfh(&xdr);
	if (!status)
B
Benny Halevy 已提交
5787
		status = decode_statfs(&xdr, res->fsstat);
L
Linus Torvalds 已提交
5788 5789 5790 5791
	return status;
}

/*
5792
 * Decode GETATTR_BITMAP response
L
Linus Torvalds 已提交
5793
 */
A
Al Viro 已提交
5794
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
5795 5796 5797 5798 5799 5800
{
	struct xdr_stream xdr;
	struct compound_hdr hdr;
	int status;

	xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
5801 5802 5803 5804 5805
	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
5806 5807 5808 5809 5810 5811 5812 5813 5814 5815 5816
		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
5817
static int nfs4_xdr_dec_renew(struct rpc_rqst *rqstp, __be32 *p, void *dummy)
L
Linus Torvalds 已提交
5818 5819 5820 5821 5822 5823 5824 5825 5826 5827 5828 5829 5830
{
	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;
}

/*
5831
 * Decode SETCLIENTID response
L
Linus Torvalds 已提交
5832
 */
A
Al Viro 已提交
5833
static int nfs4_xdr_dec_setclientid(struct rpc_rqst *req, __be32 *p,
5834
		struct nfs4_setclientid_res *res)
L
Linus Torvalds 已提交
5835 5836 5837 5838 5839 5840 5841 5842
{
	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)
5843
		status = decode_setclientid(&xdr, res);
L
Linus Torvalds 已提交
5844 5845 5846 5847
	return status;
}

/*
5848
 * Decode SETCLIENTID_CONFIRM response
L
Linus Torvalds 已提交
5849
 */
A
Al Viro 已提交
5850
static int nfs4_xdr_dec_setclientid_confirm(struct rpc_rqst *req, __be32 *p, struct nfs_fsinfo *fsinfo)
L
Linus Torvalds 已提交
5851 5852 5853 5854 5855 5856 5857 5858 5859 5860 5861 5862 5863 5864 5865 5866 5867
{
	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;
}

/*
5868
 * Decode DELEGRETURN response
L
Linus Torvalds 已提交
5869
 */
A
Al Viro 已提交
5870
static int nfs4_xdr_dec_delegreturn(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_delegreturnres *res)
L
Linus Torvalds 已提交
5871 5872 5873 5874 5875 5876 5877
{
	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);
5878 5879 5880 5881
	if (status)
		goto out;
	status = decode_sequence(&xdr, &res->seq_res, rqstp);
	if (status)
5882 5883 5884 5885 5886
		goto out;
	status = decode_putfh(&xdr);
	if (status != 0)
		goto out;
	status = decode_delegreturn(&xdr);
5887 5888
	if (status != 0)
		goto out;
5889 5890
	decode_getfattr(&xdr, res->fattr, res->server,
			!RPC_IS_ASYNC(rqstp->rq_task));
5891
out:
L
Linus Torvalds 已提交
5892 5893 5894
	return status;
}

5895
/*
5896
 * Decode FS_LOCATIONS response
5897
 */
B
Benny Halevy 已提交
5898 5899
static int nfs4_xdr_dec_fs_locations(struct rpc_rqst *req, __be32 *p,
				     struct nfs4_fs_locations_res *res)
5900 5901 5902 5903 5904 5905 5906
{
	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);
5907 5908 5909 5910
	if (status)
		goto out;
	status = decode_sequence(&xdr, &res->seq_res, req);
	if (status)
5911 5912 5913 5914 5915 5916
		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
5917
	status = decode_getfattr(&xdr, &res->fs_locations->fattr,
5918 5919
				 res->fs_locations->server,
				 !RPC_IS_ASYNC(req->rq_task));
5920 5921 5922 5923
out:
	return status;
}

B
Benny Halevy 已提交
5924 5925
#if defined(CONFIG_NFS_V4_1)
/*
5926
 * Decode EXCHANGE_ID response
B
Benny Halevy 已提交
5927 5928 5929 5930 5931 5932 5933 5934 5935 5936 5937 5938 5939 5940
 */
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
5941

A
Andy Adamson 已提交
5942
/*
5943
 * Decode CREATE_SESSION response
A
Andy Adamson 已提交
5944 5945 5946 5947 5948 5949 5950 5951 5952 5953 5954 5955 5956 5957 5958
 */
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
5959
/*
5960
 * Decode DESTROY_SESSION response
A
Andy Adamson 已提交
5961 5962 5963 5964 5965 5966 5967 5968 5969 5970 5971 5972 5973 5974 5975
 */
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
5976
/*
5977
 * Decode SEQUENCE response
A
Andy Adamson 已提交
5978 5979 5980 5981 5982 5983 5984 5985 5986 5987 5988 5989 5990 5991 5992
 */
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
5993
/*
5994
 * Decode GET_LEASE_TIME response
A
Andy Adamson 已提交
5995 5996 5997 5998 5999 6000 6001 6002 6003 6004 6005 6006 6007 6008 6009 6010 6011 6012
 */
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;
}
6013 6014 6015 6016 6017 6018 6019 6020 6021 6022 6023 6024 6025 6026 6027 6028 6029 6030 6031

/*
 * 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;
}
6032 6033 6034 6035 6036 6037 6038 6039 6040 6041 6042 6043 6044 6045 6046 6047 6048 6049 6050 6051 6052 6053 6054 6055 6056 6057 6058 6059 6060 6061 6062 6063 6064 6065 6066 6067 6068 6069 6070 6071 6072 6073 6074 6075 6076 6077 6078

/*
 * Decode GETDEVINFO response
 */
static int nfs4_xdr_dec_getdeviceinfo(struct rpc_rqst *rqstp, uint32_t *p,
				      struct nfs4_getdeviceinfo_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 != 0)
		goto out;
	status = decode_sequence(&xdr, &res->seq_res, rqstp);
	if (status != 0)
		goto out;
	status = decode_getdeviceinfo(&xdr, res->pdev);
out:
	return status;
}

/*
 * Decode LAYOUTGET response
 */
static int nfs4_xdr_dec_layoutget(struct rpc_rqst *rqstp, uint32_t *p,
				  struct nfs4_layoutget_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)
		goto out;
	status = decode_sequence(&xdr, &res->seq_res, rqstp);
	if (status)
		goto out;
	status = decode_putfh(&xdr);
	if (status)
		goto out;
	status = decode_layoutget(&xdr, rqstp, res);
out:
	return status;
}
B
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6079 6080
#endif /* CONFIG_NFS_V4_1 */

6081 6082 6083 6084 6085 6086 6087 6088 6089 6090 6091 6092 6093 6094 6095 6096
/**
 * nfs4_decode_dirent - Decode a single NFSv4 directory entry stored in
 *                      the local page cache.
 * @xdr: XDR stream where entry resides
 * @entry: buffer to fill in with entry data
 * @plus: boolean indicating whether this should be a readdirplus entry
 *
 * Returns zero if successful, otherwise a negative errno value is
 * returned.
 *
 * This function is not invoked during READDIR reply decoding, but
 * rather whenever an application invokes the getdents(2) system call
 * on a directory already in our cache.
 */
int nfs4_decode_dirent(struct xdr_stream *xdr, struct nfs_entry *entry,
		       int plus)
L
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6097 6098 6099
{
	uint32_t bitmap[2] = {0};
	uint32_t len;
6100 6101 6102 6103 6104 6105 6106 6107
	__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++))
6108
			return -EAGAIN;
L
Linus Torvalds 已提交
6109
		entry->eof = 1;
6110
		return -EBADCOOKIE;
L
Linus Torvalds 已提交
6111 6112
	}

6113 6114 6115
	p = xdr_inline_decode(xdr, 12);
	if (unlikely(!p))
		goto out_overflow;
L
Linus Torvalds 已提交
6116 6117 6118
	entry->prev_cookie = entry->cookie;
	p = xdr_decode_hyper(p, &entry->cookie);
	entry->len = ntohl(*p++);
6119

6120
	p = xdr_inline_decode(xdr, entry->len);
6121 6122
	if (unlikely(!p))
		goto out_overflow;
L
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6123 6124 6125 6126 6127 6128 6129 6130
	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;
6131
	entry->fattr->valid = 0;
L
Linus Torvalds 已提交
6132

6133 6134 6135 6136 6137 6138
	if (decode_attr_bitmap(xdr, bitmap) < 0)
		goto out_overflow;

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

6139 6140
	if (decode_getfattr_attrs(xdr, bitmap, entry->fattr, entry->fh,
					entry->server, 1) < 0)
6141 6142 6143 6144
		goto out_overflow;
	if (entry->fattr->valid & NFS_ATTR_FATTR_FILEID)
		entry->ino = entry->fattr->fileid;

6145 6146 6147 6148
	entry->d_type = DT_UNKNOWN;
	if (entry->fattr->valid & NFS_ATTR_FATTR_TYPE)
		entry->d_type = nfs_umode_to_dtype(entry->fattr->mode);

6149
	if (verify_attr_len(xdr, p, len) < 0)
6150
		goto out_overflow;
L
Linus Torvalds 已提交
6151

6152 6153 6154 6155 6156 6157
	p = xdr_inline_peek(xdr, 8);
	if (p != NULL)
		entry->eof = !p[0] && p[1];
	else
		entry->eof = 0;

6158
	return 0;
6159 6160 6161

out_overflow:
	print_overflow_msg(__func__, xdr);
6162
	return -EAGAIN;
L
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6163 6164 6165 6166 6167 6168 6169 6170 6171 6172 6173
}

/*
 * 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		},
6174 6175 6176 6177 6178 6179 6180 6181 6182 6183 6184 6185 6186 6187 6188 6189 6190 6191 6192 6193 6194 6195 6196 6197
	{ 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	},
6198
	{ NFS4ERR_SERVERFAULT,	-EREMOTEIO	},
6199 6200 6201 6202 6203 6204
	{ 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
6205 6206 6207
						    * to be handled by a
						    * middle-layer.
						    */
6208
	{ -1,			-EIO		}
L
Linus Torvalds 已提交
6209 6210 6211 6212 6213 6214 6215
};

/*
 * Convert an NFS error code to a local one.
 * This one is used jointly by NFSv2 and NFSv3.
 */
static int
6216
nfs4_stat_to_errno(int stat)
L
Linus Torvalds 已提交
6217 6218 6219 6220 6221 6222 6223 6224
{
	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. */
6225
		return -EREMOTEIO;
L
Linus Torvalds 已提交
6226 6227 6228 6229 6230 6231
	}
	/* 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.
	 */
6232
	return -stat;
L
Linus Torvalds 已提交
6233 6234 6235 6236 6237
}

#define PROC(proc, argtype, restype)				\
[NFSPROC4_CLNT_##proc] = {					\
	.p_proc   = NFSPROC4_COMPOUND,				\
6238
	.p_encode = (kxdreproc_t)nfs4_xdr_##argtype,		\
6239
	.p_decode = (kxdrproc_t)nfs4_xdr_##restype,		\
6240 6241
	.p_arglen = NFS4_##argtype##_sz,			\
	.p_replen = NFS4_##restype##_sz,			\
6242 6243
	.p_statidx = NFSPROC4_CLNT_##proc,			\
	.p_name   = #proc,					\
A
Andy Adamson 已提交
6244
}
L
Linus Torvalds 已提交
6245 6246

struct rpc_procinfo	nfs4_procedures[] = {
6247 6248 6249 6250 6251 6252 6253 6254 6255 6256 6257 6258 6259 6260 6261 6262 6263 6264 6265 6266 6267 6268 6269 6270 6271 6272 6273 6274 6275 6276 6277 6278 6279 6280 6281
	PROC(READ,		enc_read,		dec_read),
	PROC(WRITE,		enc_write,		dec_write),
	PROC(COMMIT,		enc_commit,		dec_commit),
	PROC(OPEN,		enc_open,		dec_open),
	PROC(OPEN_CONFIRM,	enc_open_confirm,	dec_open_confirm),
	PROC(OPEN_NOATTR,	enc_open_noattr,	dec_open_noattr),
	PROC(OPEN_DOWNGRADE,	enc_open_downgrade,	dec_open_downgrade),
	PROC(CLOSE,		enc_close,		dec_close),
	PROC(SETATTR,		enc_setattr,		dec_setattr),
	PROC(FSINFO,		enc_fsinfo,		dec_fsinfo),
	PROC(RENEW,		enc_renew,		dec_renew),
	PROC(SETCLIENTID,	enc_setclientid,	dec_setclientid),
	PROC(SETCLIENTID_CONFIRM, enc_setclientid_confirm, dec_setclientid_confirm),
	PROC(LOCK,		enc_lock,		dec_lock),
	PROC(LOCKT,		enc_lockt,		dec_lockt),
	PROC(LOCKU,		enc_locku,		dec_locku),
	PROC(ACCESS,		enc_access,		dec_access),
	PROC(GETATTR,		enc_getattr,		dec_getattr),
	PROC(LOOKUP,		enc_lookup,		dec_lookup),
	PROC(LOOKUP_ROOT,	enc_lookup_root,	dec_lookup_root),
	PROC(REMOVE,		enc_remove,		dec_remove),
	PROC(RENAME,		enc_rename,		dec_rename),
	PROC(LINK,		enc_link,		dec_link),
	PROC(SYMLINK,		enc_symlink,		dec_symlink),
	PROC(CREATE,		enc_create,		dec_create),
	PROC(PATHCONF,		enc_pathconf,		dec_pathconf),
	PROC(STATFS,		enc_statfs,		dec_statfs),
	PROC(READLINK,		enc_readlink,		dec_readlink),
	PROC(READDIR,		enc_readdir,		dec_readdir),
	PROC(SERVER_CAPS,	enc_server_caps,	dec_server_caps),
	PROC(DELEGRETURN,	enc_delegreturn,	dec_delegreturn),
	PROC(GETACL,		enc_getacl,		dec_getacl),
	PROC(SETACL,		enc_setacl,		dec_setacl),
	PROC(FS_LOCATIONS,	enc_fs_locations,	dec_fs_locations),
	PROC(RELEASE_LOCKOWNER,	enc_release_lockowner,	dec_release_lockowner),
B
Benny Halevy 已提交
6282
#if defined(CONFIG_NFS_V4_1)
6283 6284 6285 6286 6287 6288 6289 6290
	PROC(EXCHANGE_ID,	enc_exchange_id,	dec_exchange_id),
	PROC(CREATE_SESSION,	enc_create_session,	dec_create_session),
	PROC(DESTROY_SESSION,	enc_destroy_session,	dec_destroy_session),
	PROC(SEQUENCE,		enc_sequence,		dec_sequence),
	PROC(GET_LEASE_TIME,	enc_get_lease_time,	dec_get_lease_time),
	PROC(RECLAIM_COMPLETE,	enc_reclaim_complete,	dec_reclaim_complete),
	PROC(GETDEVICEINFO,	enc_getdeviceinfo,	dec_getdeviceinfo),
	PROC(LAYOUTGET,		enc_layoutget,		dec_layoutget),
B
Benny Halevy 已提交
6291
#endif /* CONFIG_NFS_V4_1 */
L
Linus Torvalds 已提交
6292 6293 6294 6295
};

struct rpc_version		nfs_version4 = {
	.number			= 4,
6296
	.nrprocs		= ARRAY_SIZE(nfs4_procedures),
L
Linus Torvalds 已提交
6297 6298 6299 6300 6301 6302 6303 6304
	.procs			= nfs4_procedures
};

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