nfs4xdr.c 156.0 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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#define NFSDBG_FACILITY		NFSDBG_XDR

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

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

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

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

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#define NFS4_enc_compound_sz	(1024)  /* XXX: large enough? */
#define NFS4_dec_compound_sz	(1024)  /* XXX: large enough? */
#define NFS4_enc_read_sz	(compound_encode_hdr_maxsz + \
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				encode_sequence_maxsz + \
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				encode_putfh_maxsz + \
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				encode_read_maxsz)
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#define NFS4_dec_read_sz	(compound_decode_hdr_maxsz + \
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				decode_sequence_maxsz + \
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				decode_putfh_maxsz + \
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				decode_read_maxsz)
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#define NFS4_enc_readlink_sz	(compound_encode_hdr_maxsz + \
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				encode_sequence_maxsz + \
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				encode_putfh_maxsz + \
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				encode_readlink_maxsz)
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#define NFS4_dec_readlink_sz	(compound_decode_hdr_maxsz + \
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				decode_sequence_maxsz + \
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				decode_putfh_maxsz + \
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				decode_readlink_maxsz)
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#define NFS4_enc_readdir_sz	(compound_encode_hdr_maxsz + \
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				encode_sequence_maxsz + \
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				encode_putfh_maxsz + \
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				encode_readdir_maxsz)
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#define NFS4_dec_readdir_sz	(compound_decode_hdr_maxsz + \
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				decode_sequence_maxsz + \
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				decode_putfh_maxsz + \
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				decode_readdir_maxsz)
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#define NFS4_enc_write_sz	(compound_encode_hdr_maxsz + \
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				encode_sequence_maxsz + \
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				encode_putfh_maxsz + \
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				encode_write_maxsz + \
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				encode_getattr_maxsz)
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#define NFS4_dec_write_sz	(compound_decode_hdr_maxsz + \
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				decode_sequence_maxsz + \
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				decode_putfh_maxsz + \
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				decode_write_maxsz + \
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				decode_getattr_maxsz)
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#define NFS4_enc_commit_sz	(compound_encode_hdr_maxsz + \
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				encode_sequence_maxsz + \
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				encode_putfh_maxsz + \
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				encode_commit_maxsz + \
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				encode_getattr_maxsz)
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#define NFS4_dec_commit_sz	(compound_decode_hdr_maxsz + \
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				decode_sequence_maxsz + \
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				decode_putfh_maxsz + \
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				decode_commit_maxsz + \
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				decode_getattr_maxsz)
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#define NFS4_enc_open_sz        (compound_encode_hdr_maxsz + \
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				encode_sequence_maxsz + \
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				encode_putfh_maxsz + \
				encode_savefh_maxsz + \
				encode_open_maxsz + \
				encode_getfh_maxsz + \
				encode_getattr_maxsz + \
				encode_restorefh_maxsz + \
				encode_getattr_maxsz)
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#define NFS4_dec_open_sz        (compound_decode_hdr_maxsz + \
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				decode_sequence_maxsz + \
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				decode_putfh_maxsz + \
				decode_savefh_maxsz + \
				decode_open_maxsz + \
				decode_getfh_maxsz + \
				decode_getattr_maxsz + \
				decode_restorefh_maxsz + \
				decode_getattr_maxsz)
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#define NFS4_enc_open_confirm_sz \
				(compound_encode_hdr_maxsz + \
				 encode_putfh_maxsz + \
				 encode_open_confirm_maxsz)
#define NFS4_dec_open_confirm_sz \
				(compound_decode_hdr_maxsz + \
				 decode_putfh_maxsz + \
				 decode_open_confirm_maxsz)
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#define NFS4_enc_open_noattr_sz	(compound_encode_hdr_maxsz + \
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					encode_sequence_maxsz + \
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					encode_putfh_maxsz + \
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					encode_open_maxsz + \
					encode_getattr_maxsz)
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#define NFS4_dec_open_noattr_sz	(compound_decode_hdr_maxsz + \
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					decode_sequence_maxsz + \
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					decode_putfh_maxsz + \
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					decode_open_maxsz + \
					decode_getattr_maxsz)
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#define NFS4_enc_open_downgrade_sz \
				(compound_encode_hdr_maxsz + \
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				 encode_sequence_maxsz + \
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				 encode_putfh_maxsz + \
				 encode_open_downgrade_maxsz + \
				 encode_getattr_maxsz)
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#define NFS4_dec_open_downgrade_sz \
				(compound_decode_hdr_maxsz + \
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				 decode_sequence_maxsz + \
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				 decode_putfh_maxsz + \
				 decode_open_downgrade_maxsz + \
				 decode_getattr_maxsz)
#define NFS4_enc_close_sz	(compound_encode_hdr_maxsz + \
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				 encode_sequence_maxsz + \
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				 encode_putfh_maxsz + \
				 encode_close_maxsz + \
				 encode_getattr_maxsz)
#define NFS4_dec_close_sz	(compound_decode_hdr_maxsz + \
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				 decode_sequence_maxsz + \
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				 decode_putfh_maxsz + \
				 decode_close_maxsz + \
				 decode_getattr_maxsz)
#define NFS4_enc_setattr_sz	(compound_encode_hdr_maxsz + \
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				 encode_sequence_maxsz + \
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				 encode_putfh_maxsz + \
				 encode_setattr_maxsz + \
				 encode_getattr_maxsz)
#define NFS4_dec_setattr_sz	(compound_decode_hdr_maxsz + \
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				 decode_sequence_maxsz + \
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				 decode_putfh_maxsz + \
				 decode_setattr_maxsz + \
				 decode_getattr_maxsz)
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#define NFS4_enc_fsinfo_sz	(compound_encode_hdr_maxsz + \
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				encode_sequence_maxsz + \
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				encode_putfh_maxsz + \
				encode_fsinfo_maxsz)
#define NFS4_dec_fsinfo_sz	(compound_decode_hdr_maxsz + \
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				decode_sequence_maxsz + \
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				decode_putfh_maxsz + \
				decode_fsinfo_maxsz)
#define NFS4_enc_renew_sz	(compound_encode_hdr_maxsz + \
				encode_renew_maxsz)
#define NFS4_dec_renew_sz	(compound_decode_hdr_maxsz + \
				decode_renew_maxsz)
#define NFS4_enc_setclientid_sz	(compound_encode_hdr_maxsz + \
				encode_setclientid_maxsz)
#define NFS4_dec_setclientid_sz	(compound_decode_hdr_maxsz + \
				decode_setclientid_maxsz)
#define NFS4_enc_setclientid_confirm_sz \
				(compound_encode_hdr_maxsz + \
				encode_setclientid_confirm_maxsz + \
				encode_putrootfh_maxsz + \
				encode_fsinfo_maxsz)
#define NFS4_dec_setclientid_confirm_sz \
				(compound_decode_hdr_maxsz + \
				decode_setclientid_confirm_maxsz + \
				decode_putrootfh_maxsz + \
				decode_fsinfo_maxsz)
#define NFS4_enc_lock_sz        (compound_encode_hdr_maxsz + \
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				encode_sequence_maxsz + \
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				encode_putfh_maxsz + \
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				encode_lock_maxsz)
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#define NFS4_dec_lock_sz        (compound_decode_hdr_maxsz + \
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				decode_sequence_maxsz + \
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				decode_putfh_maxsz + \
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				decode_lock_maxsz)
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#define NFS4_enc_lockt_sz       (compound_encode_hdr_maxsz + \
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				encode_sequence_maxsz + \
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				encode_putfh_maxsz + \
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				encode_lockt_maxsz)
#define NFS4_dec_lockt_sz       (compound_decode_hdr_maxsz + \
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				 decode_sequence_maxsz + \
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				 decode_putfh_maxsz + \
				 decode_lockt_maxsz)
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#define NFS4_enc_locku_sz       (compound_encode_hdr_maxsz + \
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				encode_sequence_maxsz + \
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				encode_putfh_maxsz + \
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				encode_locku_maxsz)
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#define NFS4_dec_locku_sz       (compound_decode_hdr_maxsz + \
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				decode_sequence_maxsz + \
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				decode_putfh_maxsz + \
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				decode_locku_maxsz)
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#define NFS4_enc_release_lockowner_sz \
				(compound_encode_hdr_maxsz + \
				 encode_lockowner_maxsz)
#define NFS4_dec_release_lockowner_sz \
				(compound_decode_hdr_maxsz + \
				 decode_lockowner_maxsz)
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#define NFS4_enc_access_sz	(compound_encode_hdr_maxsz + \
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				encode_sequence_maxsz + \
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				encode_putfh_maxsz + \
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				encode_access_maxsz + \
				encode_getattr_maxsz)
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#define NFS4_dec_access_sz	(compound_decode_hdr_maxsz + \
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				decode_sequence_maxsz + \
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				decode_putfh_maxsz + \
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				decode_access_maxsz + \
				decode_getattr_maxsz)
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#define NFS4_enc_getattr_sz	(compound_encode_hdr_maxsz + \
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				encode_sequence_maxsz + \
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				encode_putfh_maxsz + \
				encode_getattr_maxsz)
#define NFS4_dec_getattr_sz	(compound_decode_hdr_maxsz + \
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				decode_sequence_maxsz + \
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				decode_putfh_maxsz + \
				decode_getattr_maxsz)
#define NFS4_enc_lookup_sz	(compound_encode_hdr_maxsz + \
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				encode_sequence_maxsz + \
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				encode_putfh_maxsz + \
				encode_lookup_maxsz + \
				encode_getattr_maxsz + \
				encode_getfh_maxsz)
#define NFS4_dec_lookup_sz	(compound_decode_hdr_maxsz + \
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				decode_sequence_maxsz + \
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				decode_putfh_maxsz + \
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				decode_lookup_maxsz + \
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				decode_getattr_maxsz + \
				decode_getfh_maxsz)
#define NFS4_enc_lookup_root_sz (compound_encode_hdr_maxsz + \
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				encode_sequence_maxsz + \
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				encode_putrootfh_maxsz + \
				encode_getattr_maxsz + \
				encode_getfh_maxsz)
#define NFS4_dec_lookup_root_sz (compound_decode_hdr_maxsz + \
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				decode_sequence_maxsz + \
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				decode_putrootfh_maxsz + \
				decode_getattr_maxsz + \
				decode_getfh_maxsz)
#define NFS4_enc_remove_sz	(compound_encode_hdr_maxsz + \
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				encode_sequence_maxsz + \
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				encode_putfh_maxsz + \
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				encode_remove_maxsz + \
				encode_getattr_maxsz)
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#define NFS4_dec_remove_sz	(compound_decode_hdr_maxsz + \
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				decode_sequence_maxsz + \
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				decode_putfh_maxsz + \
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				decode_remove_maxsz + \
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				decode_getattr_maxsz)
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#define NFS4_enc_rename_sz	(compound_encode_hdr_maxsz + \
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				encode_sequence_maxsz + \
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				encode_putfh_maxsz + \
				encode_savefh_maxsz + \
				encode_putfh_maxsz + \
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				encode_rename_maxsz + \
				encode_getattr_maxsz + \
				encode_restorefh_maxsz + \
				encode_getattr_maxsz)
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#define NFS4_dec_rename_sz	(compound_decode_hdr_maxsz + \
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				decode_sequence_maxsz + \
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				decode_putfh_maxsz + \
				decode_savefh_maxsz + \
				decode_putfh_maxsz + \
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				decode_rename_maxsz + \
				decode_getattr_maxsz + \
				decode_restorefh_maxsz + \
				decode_getattr_maxsz)
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#define NFS4_enc_link_sz	(compound_encode_hdr_maxsz + \
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				encode_sequence_maxsz + \
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				encode_putfh_maxsz + \
				encode_savefh_maxsz + \
				encode_putfh_maxsz + \
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				encode_link_maxsz + \
				decode_getattr_maxsz + \
				encode_restorefh_maxsz + \
				decode_getattr_maxsz)
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#define NFS4_dec_link_sz	(compound_decode_hdr_maxsz + \
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				decode_sequence_maxsz + \
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				decode_putfh_maxsz + \
				decode_savefh_maxsz + \
				decode_putfh_maxsz + \
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				decode_link_maxsz + \
				decode_getattr_maxsz + \
				decode_restorefh_maxsz + \
				decode_getattr_maxsz)
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#define NFS4_enc_symlink_sz	(compound_encode_hdr_maxsz + \
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				encode_sequence_maxsz + \
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				encode_putfh_maxsz + \
				encode_symlink_maxsz + \
				encode_getattr_maxsz + \
				encode_getfh_maxsz)
#define NFS4_dec_symlink_sz	(compound_decode_hdr_maxsz + \
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				decode_sequence_maxsz + \
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				decode_putfh_maxsz + \
				decode_symlink_maxsz + \
				decode_getattr_maxsz + \
				decode_getfh_maxsz)
#define NFS4_enc_create_sz	(compound_encode_hdr_maxsz + \
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				encode_sequence_maxsz + \
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				encode_putfh_maxsz + \
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				encode_savefh_maxsz + \
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				encode_create_maxsz + \
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				encode_getfh_maxsz + \
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				encode_getattr_maxsz + \
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				encode_restorefh_maxsz + \
				encode_getattr_maxsz)
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#define NFS4_dec_create_sz	(compound_decode_hdr_maxsz + \
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				decode_sequence_maxsz + \
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				decode_putfh_maxsz + \
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				decode_savefh_maxsz + \
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				decode_create_maxsz + \
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				decode_getfh_maxsz + \
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				decode_getattr_maxsz + \
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				decode_restorefh_maxsz + \
				decode_getattr_maxsz)
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#define NFS4_enc_pathconf_sz	(compound_encode_hdr_maxsz + \
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				encode_sequence_maxsz + \
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				encode_putfh_maxsz + \
				encode_getattr_maxsz)
#define NFS4_dec_pathconf_sz	(compound_decode_hdr_maxsz + \
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				decode_sequence_maxsz + \
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				decode_putfh_maxsz + \
				decode_getattr_maxsz)
#define NFS4_enc_statfs_sz	(compound_encode_hdr_maxsz + \
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				encode_sequence_maxsz + \
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				encode_putfh_maxsz + \
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				encode_statfs_maxsz)
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#define NFS4_dec_statfs_sz	(compound_decode_hdr_maxsz + \
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				decode_sequence_maxsz + \
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				decode_putfh_maxsz + \
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				decode_statfs_maxsz)
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#define NFS4_enc_server_caps_sz (compound_encode_hdr_maxsz + \
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				encode_sequence_maxsz + \
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				encode_putfh_maxsz + \
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				encode_getattr_maxsz)
#define NFS4_dec_server_caps_sz (compound_decode_hdr_maxsz + \
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				decode_sequence_maxsz + \
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				decode_putfh_maxsz + \
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				decode_getattr_maxsz)
#define NFS4_enc_delegreturn_sz	(compound_encode_hdr_maxsz + \
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				encode_sequence_maxsz + \
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				encode_putfh_maxsz + \
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				encode_delegreturn_maxsz + \
				encode_getattr_maxsz)
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#define NFS4_dec_delegreturn_sz (compound_decode_hdr_maxsz + \
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				decode_sequence_maxsz + \
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				decode_delegreturn_maxsz + \
				decode_getattr_maxsz)
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#define NFS4_enc_getacl_sz	(compound_encode_hdr_maxsz + \
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				encode_sequence_maxsz + \
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				encode_putfh_maxsz + \
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				encode_getacl_maxsz)
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#define NFS4_dec_getacl_sz	(compound_decode_hdr_maxsz + \
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				decode_sequence_maxsz + \
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				decode_putfh_maxsz + \
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				decode_getacl_maxsz)
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#define NFS4_enc_setacl_sz	(compound_encode_hdr_maxsz + \
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				encode_sequence_maxsz + \
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				encode_putfh_maxsz + \
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				encode_setacl_maxsz)
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#define NFS4_dec_setacl_sz	(compound_decode_hdr_maxsz + \
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				decode_sequence_maxsz + \
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				decode_putfh_maxsz + \
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				decode_setacl_maxsz)
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#define NFS4_enc_fs_locations_sz \
				(compound_encode_hdr_maxsz + \
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				 encode_sequence_maxsz + \
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				 encode_putfh_maxsz + \
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				 encode_lookup_maxsz + \
				 encode_fs_locations_maxsz)
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#define NFS4_dec_fs_locations_sz \
				(compound_decode_hdr_maxsz + \
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				 decode_sequence_maxsz + \
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				 decode_putfh_maxsz + \
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				 decode_lookup_maxsz + \
				 decode_fs_locations_maxsz)
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#if defined(CONFIG_NFS_V4_1)
#define NFS4_enc_exchange_id_sz \
				(compound_encode_hdr_maxsz + \
				 encode_exchange_id_maxsz)
#define NFS4_dec_exchange_id_sz \
				(compound_decode_hdr_maxsz + \
				 decode_exchange_id_maxsz)
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#define NFS4_enc_create_session_sz \
				(compound_encode_hdr_maxsz + \
				 encode_create_session_maxsz)
#define NFS4_dec_create_session_sz \
				(compound_decode_hdr_maxsz + \
				 decode_create_session_maxsz)
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#define NFS4_enc_destroy_session_sz	(compound_encode_hdr_maxsz + \
					 encode_destroy_session_maxsz)
#define NFS4_dec_destroy_session_sz	(compound_decode_hdr_maxsz + \
					 decode_destroy_session_maxsz)
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#define NFS4_enc_sequence_sz \
				(compound_decode_hdr_maxsz + \
				 encode_sequence_maxsz)
#define NFS4_dec_sequence_sz \
				(compound_decode_hdr_maxsz + \
				 decode_sequence_maxsz)
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#define NFS4_enc_get_lease_time_sz	(compound_encode_hdr_maxsz + \
					 encode_sequence_maxsz + \
					 encode_putrootfh_maxsz + \
					 encode_fsinfo_maxsz)
#define NFS4_dec_get_lease_time_sz	(compound_decode_hdr_maxsz + \
					 decode_sequence_maxsz + \
					 decode_putrootfh_maxsz + \
					 decode_fsinfo_maxsz)
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#define NFS4_enc_reclaim_complete_sz	(compound_encode_hdr_maxsz + \
					 encode_sequence_maxsz + \
					 encode_reclaim_complete_maxsz)
#define NFS4_dec_reclaim_complete_sz	(compound_decode_hdr_maxsz + \
					 decode_sequence_maxsz + \
					 decode_reclaim_complete_maxsz)
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const u32 nfs41_maxwrite_overhead = ((RPC_MAX_HEADER_WITH_AUTH +
				      compound_encode_hdr_maxsz +
				      encode_sequence_maxsz +
				      encode_putfh_maxsz +
				      encode_getattr_maxsz) *
				     XDR_UNIT);

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

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

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

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static void encode_compound_hdr(struct xdr_stream *xdr,
				struct rpc_rqst *req,
				struct compound_hdr *hdr)
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{
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	__be32 *p;
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	struct rpc_auth *auth = req->rq_task->tk_msg.rpc_cred->cr_auth;

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

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

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

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

	/*
	 * We reserve enough space to write the entire attribute buffer at once.
	 * In the worst-case, this would be
	 *   12(bitmap) + 4(attrlen) + 8(size) + 4(mode) + 4(atime) + 4(mtime)
	 *          = 36 bytes, plus any contribution from variable-length fields
809
	 *            such as owner/group.
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810 811 812 813 814 815 816 817 818
	 */
	len = 16;

	/* Sigh */
	if (iap->ia_valid & ATTR_SIZE)
		len += 8;
	if (iap->ia_valid & ATTR_MODE)
		len += 4;
	if (iap->ia_valid & ATTR_UID) {
819
		owner_namelen = nfs_map_uid_to_name(server->nfs_client, iap->ia_uid, owner_name);
L
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820
		if (owner_namelen < 0) {
821 822
			dprintk("nfs: couldn't resolve uid %d to string\n",
					iap->ia_uid);
L
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823 824 825 826 827 828 829 830
			/* XXX */
			strcpy(owner_name, "nobody");
			owner_namelen = sizeof("nobody") - 1;
			/* goto out; */
		}
		len += 4 + (XDR_QUADLEN(owner_namelen) << 2);
	}
	if (iap->ia_valid & ATTR_GID) {
831
		owner_grouplen = nfs_map_gid_to_group(server->nfs_client, iap->ia_gid, owner_group);
L
Linus Torvalds 已提交
832
		if (owner_grouplen < 0) {
833 834
			dprintk("nfs: couldn't resolve gid %d to string\n",
					iap->ia_gid);
L
Linus Torvalds 已提交
835 836 837 838 839 840 841 842 843 844 845 846 847 848
			strcpy(owner_group, "nobody");
			owner_grouplen = sizeof("nobody") - 1;
			/* goto out; */
		}
		len += 4 + (XDR_QUADLEN(owner_grouplen) << 2);
	}
	if (iap->ia_valid & ATTR_ATIME_SET)
		len += 16;
	else if (iap->ia_valid & ATTR_ATIME)
		len += 4;
	if (iap->ia_valid & ATTR_MTIME_SET)
		len += 16;
	else if (iap->ia_valid & ATTR_MTIME)
		len += 4;
849
	p = reserve_space(xdr, len);
L
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850 851 852 853 854

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

	if (iap->ia_valid & ATTR_SIZE) {
		bmval0 |= FATTR4_WORD0_SIZE;
B
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861
		p = xdr_encode_hyper(p, iap->ia_size);
L
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862 863 864
	}
	if (iap->ia_valid & ATTR_MODE) {
		bmval1 |= FATTR4_WORD1_MODE;
B
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865
		*p++ = cpu_to_be32(iap->ia_mode & S_IALLUGO);
L
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866 867 868
	}
	if (iap->ia_valid & ATTR_UID) {
		bmval1 |= FATTR4_WORD1_OWNER;
869
		p = xdr_encode_opaque(p, owner_name, owner_namelen);
L
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	}
	if (iap->ia_valid & ATTR_GID) {
		bmval1 |= FATTR4_WORD1_OWNER_GROUP;
873
		p = xdr_encode_opaque(p, owner_group, owner_grouplen);
L
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	}
	if (iap->ia_valid & ATTR_ATIME_SET) {
		bmval1 |= FATTR4_WORD1_TIME_ACCESS_SET;
B
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		*p++ = cpu_to_be32(NFS4_SET_TO_CLIENT_TIME);
		*p++ = cpu_to_be32(0);
879 880
		*p++ = cpu_to_be32(iap->ia_atime.tv_sec);
		*p++ = cpu_to_be32(iap->ia_atime.tv_nsec);
L
Linus Torvalds 已提交
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	}
	else if (iap->ia_valid & ATTR_ATIME) {
		bmval1 |= FATTR4_WORD1_TIME_ACCESS_SET;
B
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884
		*p++ = cpu_to_be32(NFS4_SET_TO_SERVER_TIME);
L
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	}
	if (iap->ia_valid & ATTR_MTIME_SET) {
		bmval1 |= FATTR4_WORD1_TIME_MODIFY_SET;
B
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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
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	}
	else if (iap->ia_valid & ATTR_MTIME) {
		bmval1 |= FATTR4_WORD1_TIME_MODIFY_SET;
B
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		*p++ = cpu_to_be32(NFS4_SET_TO_SERVER_TIME);
L
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896
	}
897

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

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

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

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

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

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

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

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

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

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

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

	default:
		break;
	}

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

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

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

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

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

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

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

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

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

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

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

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

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

T
Trond Myklebust 已提交
1045 1046 1047 1048 1049 1050 1051 1052 1053 1054 1055 1056 1057 1058
static inline int nfs4_lock_type(struct file_lock *fl, int block)
{
	if ((fl->fl_type & (F_RDLCK|F_WRLCK|F_UNLCK)) == F_RDLCK)
		return block ? NFS4_READW_LT : NFS4_READ_LT;
	return block ? NFS4_WRITEW_LT : NFS4_WRITE_LT;
}

static inline uint64_t nfs4_lock_length(struct file_lock *fl)
{
	if (fl->fl_end == OFFSET_MAX)
		return ~(uint64_t)0;
	return fl->fl_end - fl->fl_start + 1;
}

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

1269
static inline void encode_claim_previous(struct xdr_stream *xdr, fmode_t type)
L
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1270
{
A
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1271
	__be32 *p;
L
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1273
	p = reserve_space(xdr, 4);
1274
	*p = cpu_to_be32(NFS4_OPEN_CLAIM_PREVIOUS);
L
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1275 1276 1277 1278 1279
	encode_delegation_type(xdr, type);
}

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

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

1288
static void encode_open(struct xdr_stream *xdr, const struct nfs_openargs *arg, struct compound_hdr *hdr)
L
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1289 1290 1291 1292
{
	encode_openhdr(xdr, arg);
	encode_opentype(xdr, arg);
	switch (arg->claim) {
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1293 1294 1295 1296 1297 1298 1299 1300 1301 1302 1303
	case NFS4_OPEN_CLAIM_NULL:
		encode_claim_null(xdr, arg->name);
		break;
	case NFS4_OPEN_CLAIM_PREVIOUS:
		encode_claim_previous(xdr, arg->u.delegation_type);
		break;
	case NFS4_OPEN_CLAIM_DELEGATE_CUR:
		encode_claim_delegate_cur(xdr, arg->name, &arg->u.delegation);
		break;
	default:
		BUG();
L
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1304
	}
1305
	hdr->nops++;
1306
	hdr->replen += decode_open_maxsz;
L
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}

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

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

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

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

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

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

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

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

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

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

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

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

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

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

1386
static void encode_readdir(struct xdr_stream *xdr, const struct nfs4_readdir_arg *readdir, struct rpc_rqst *req, struct compound_hdr *hdr)
L
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1387
{
1388 1389 1390 1391
	uint32_t attrs[2] = {
		FATTR4_WORD0_RDATTR_ERROR|FATTR4_WORD0_FILEID,
		FATTR4_WORD1_MOUNTED_ON_FILEID,
	};
A
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1392
	__be32 *p;
L
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1393

1394
	p = reserve_space(xdr, 12+NFS4_VERIFIER_SIZE+20);
B
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1395
	*p++ = cpu_to_be32(OP_READDIR);
B
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1396
	p = xdr_encode_hyper(p, readdir->cookie);
B
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1397
	p = xdr_encode_opaque_fixed(p, readdir->verifier.data, NFS4_VERIFIER_SIZE);
B
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1398 1399 1400
	*p++ = cpu_to_be32(readdir->count >> 1);  /* We're not doing readdirplus */
	*p++ = cpu_to_be32(readdir->count);
	*p++ = cpu_to_be32(2);
1401 1402 1403 1404 1405
	/* 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
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1406
	*p++ = cpu_to_be32(attrs[0] & readdir->bitmask[0]);
1407
	*p = cpu_to_be32(attrs[1] & readdir->bitmask[1]);
1408
	hdr->nops++;
1409
	hdr->replen += decode_readdir_maxsz;
1410 1411
	dprintk("%s: cookie = %Lu, verifier = %08x:%08x, bitmap = %08x:%08x\n",
			__func__,
1412 1413 1414 1415 1416
			(unsigned long long)readdir->cookie,
			((u32 *)readdir->verifier.data)[0],
			((u32 *)readdir->verifier.data)[1],
			attrs[0] & readdir->bitmask[0],
			attrs[1] & readdir->bitmask[1]);
L
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1417 1418
}

1419
static void encode_readlink(struct xdr_stream *xdr, const struct nfs4_readlink *readlink, struct rpc_rqst *req, struct compound_hdr *hdr)
L
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1420
{
A
Al Viro 已提交
1421
	__be32 *p;
L
Linus Torvalds 已提交
1422

1423
	p = reserve_space(xdr, 4);
1424
	*p = cpu_to_be32(OP_READLINK);
1425
	hdr->nops++;
1426
	hdr->replen += decode_readlink_maxsz;
L
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1427 1428
}

1429
static void encode_remove(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
L
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1430
{
A
Al Viro 已提交
1431
	__be32 *p;
L
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1432

1433
	p = reserve_space(xdr, 8 + name->len);
B
Benny Halevy 已提交
1434
	*p++ = cpu_to_be32(OP_REMOVE);
1435
	xdr_encode_opaque(p, name->name, name->len);
1436
	hdr->nops++;
1437
	hdr->replen += decode_remove_maxsz;
L
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1438 1439
}

1440
static void encode_rename(struct xdr_stream *xdr, const struct qstr *oldname, const struct qstr *newname, struct compound_hdr *hdr)
L
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1441
{
A
Al Viro 已提交
1442
	__be32 *p;
L
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1443

1444 1445 1446 1447
	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);
1448
	hdr->nops++;
1449
	hdr->replen += decode_rename_maxsz;
L
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1450 1451
}

1452
static void encode_renew(struct xdr_stream *xdr, const struct nfs_client *client_stateid, struct compound_hdr *hdr)
L
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1453
{
A
Al Viro 已提交
1454
	__be32 *p;
L
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1455

1456
	p = reserve_space(xdr, 12);
B
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1457
	*p++ = cpu_to_be32(OP_RENEW);
1458
	xdr_encode_hyper(p, client_stateid->cl_clientid);
1459
	hdr->nops++;
1460
	hdr->replen += decode_renew_maxsz;
L
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1461 1462
}

1463
static void
1464
encode_restorefh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1465
{
A
Al Viro 已提交
1466
	__be32 *p;
1467

1468
	p = reserve_space(xdr, 4);
1469
	*p = cpu_to_be32(OP_RESTOREFH);
1470
	hdr->nops++;
1471
	hdr->replen += decode_restorefh_maxsz;
1472 1473
}

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

1479
	p = reserve_space(xdr, 4+NFS4_STATEID_SIZE);
B
Benny Halevy 已提交
1480
	*p++ = cpu_to_be32(OP_SETATTR);
1481
	xdr_encode_opaque_fixed(p, zero_stateid.data, NFS4_STATEID_SIZE);
1482
	p = reserve_space(xdr, 2*4);
B
Benny Halevy 已提交
1483
	*p++ = cpu_to_be32(1);
1484
	*p = cpu_to_be32(FATTR4_WORD0_ACL);
1485 1486
	if (arg->acl_len % 4)
		return -EINVAL;
1487
	p = reserve_space(xdr, 4);
1488
	*p = cpu_to_be32(arg->acl_len);
1489
	xdr_write_pages(xdr, arg->acl_pages, arg->acl_pgbase, arg->acl_len);
1490
	hdr->nops++;
1491
	hdr->replen += decode_setacl_maxsz;
1492 1493 1494
	return 0;
}

1495
static void
1496
encode_savefh(struct xdr_stream *xdr, struct compound_hdr *hdr)
L
Linus Torvalds 已提交
1497
{
A
Al Viro 已提交
1498
	__be32 *p;
L
Linus Torvalds 已提交
1499

1500
	p = reserve_space(xdr, 4);
1501
	*p = cpu_to_be32(OP_SAVEFH);
1502
	hdr->nops++;
1503
	hdr->replen += decode_savefh_maxsz;
L
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1504 1505
}

1506
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
1507
{
A
Al Viro 已提交
1508
	__be32 *p;
1509

1510
	p = reserve_space(xdr, 4+NFS4_STATEID_SIZE);
B
Benny Halevy 已提交
1511
	*p++ = cpu_to_be32(OP_SETATTR);
1512
	xdr_encode_opaque_fixed(p, arg->stateid.data, NFS4_STATEID_SIZE);
1513
	hdr->nops++;
1514
	hdr->replen += decode_setattr_maxsz;
1515
	encode_attrs(xdr, arg->iap, server);
L
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1516 1517
}

1518
static void encode_setclientid(struct xdr_stream *xdr, const struct nfs4_setclientid *setclientid, struct compound_hdr *hdr)
L
Linus Torvalds 已提交
1519
{
A
Al Viro 已提交
1520
	__be32 *p;
L
Linus Torvalds 已提交
1521

1522
	p = reserve_space(xdr, 4 + NFS4_VERIFIER_SIZE);
B
Benny Halevy 已提交
1523
	*p++ = cpu_to_be32(OP_SETCLIENTID);
1524
	xdr_encode_opaque_fixed(p, setclientid->sc_verifier->data, NFS4_VERIFIER_SIZE);
L
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1525 1526

	encode_string(xdr, setclientid->sc_name_len, setclientid->sc_name);
1527
	p = reserve_space(xdr, 4);
1528
	*p = cpu_to_be32(setclientid->sc_prog);
L
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1529 1530
	encode_string(xdr, setclientid->sc_netid_len, setclientid->sc_netid);
	encode_string(xdr, setclientid->sc_uaddr_len, setclientid->sc_uaddr);
1531
	p = reserve_space(xdr, 4);
1532
	*p = cpu_to_be32(setclientid->sc_cb_ident);
1533
	hdr->nops++;
1534
	hdr->replen += decode_setclientid_maxsz;
L
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1535 1536
}

1537
static void encode_setclientid_confirm(struct xdr_stream *xdr, const struct nfs4_setclientid_res *arg, struct compound_hdr *hdr)
L
Linus Torvalds 已提交
1538
{
A
Andy Adamson 已提交
1539
	__be32 *p;
L
Linus Torvalds 已提交
1540

1541
	p = reserve_space(xdr, 12 + NFS4_VERIFIER_SIZE);
B
Benny Halevy 已提交
1542
	*p++ = cpu_to_be32(OP_SETCLIENTID_CONFIRM);
1543 1544
	p = xdr_encode_hyper(p, arg->clientid);
	xdr_encode_opaque_fixed(p, arg->confirm.data, NFS4_VERIFIER_SIZE);
1545
	hdr->nops++;
1546
	hdr->replen += decode_setclientid_confirm_maxsz;
L
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1547 1548
}

1549
static void encode_write(struct xdr_stream *xdr, const struct nfs_writeargs *args, struct compound_hdr *hdr)
L
Linus Torvalds 已提交
1550
{
A
Al Viro 已提交
1551
	__be32 *p;
L
Linus Torvalds 已提交
1552

1553
	p = reserve_space(xdr, 4);
1554
	*p = cpu_to_be32(OP_WRITE);
L
Linus Torvalds 已提交
1555

1556
	encode_stateid(xdr, args->context, args->lock_context);
L
Linus Torvalds 已提交
1557

1558
	p = reserve_space(xdr, 16);
B
Benny Halevy 已提交
1559
	p = xdr_encode_hyper(p, args->offset);
B
Benny Halevy 已提交
1560
	*p++ = cpu_to_be32(args->stable);
1561
	*p = cpu_to_be32(args->count);
L
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1562 1563

	xdr_write_pages(xdr, args->pages, args->pgbase, args->count);
1564
	hdr->nops++;
1565
	hdr->replen += decode_write_maxsz;
L
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1566 1567
}

1568
static void encode_delegreturn(struct xdr_stream *xdr, const nfs4_stateid *stateid, struct compound_hdr *hdr)
L
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1569
{
A
Al Viro 已提交
1570
	__be32 *p;
L
Linus Torvalds 已提交
1571

1572
	p = reserve_space(xdr, 4+NFS4_STATEID_SIZE);
L
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	*p++ = cpu_to_be32(OP_DELEGRETURN);
1575
	xdr_encode_opaque_fixed(p, stateid->data, NFS4_STATEID_SIZE);
1576
	hdr->nops++;
1577
	hdr->replen += decode_delegreturn_maxsz;
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}
1579

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#if defined(CONFIG_NFS_V4_1)
1581
/* 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;

1588
	p = reserve_space(xdr, 4 + sizeof(args->verifier->data));
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	*p++ = cpu_to_be32(OP_EXCHANGE_ID);
1590
	xdr_encode_opaque_fixed(p, args->verifier->data, sizeof(args->verifier->data));
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	encode_string(xdr, args->id_len, args->id);

1594
	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 */
1597
	*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;
1610 1611 1612 1613 1614 1615 1616 1617
	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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1619 1620
	len = scnprintf(machine_name, sizeof(machine_name), "%s",
			clp->cl_ipaddr);
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1622
	p = reserve_space(xdr, 20 + 2*28 + 20 + len + 12);
1623
	*p++ = cpu_to_be32(OP_CREATE_SESSION);
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	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 */
1632
	*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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B
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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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	/* authsys_parms rfc1831 */
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1651
	*p++ = cpu_to_be32((u32)clp->cl_boot_time.tv_nsec);	/* stamp */
1652
	p = xdr_encode_opaque(p, machine_name, len);
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	*p++ = cpu_to_be32(0);				/* UID */
	*p++ = cpu_to_be32(0);				/* GID */
1655
	*p = cpu_to_be32(0);				/* No more gids */
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	hdr->nops++;
	hdr->replen += decode_create_session_maxsz;
}
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static void encode_destroy_session(struct xdr_stream *xdr,
				   struct nfs4_session *session,
				   struct compound_hdr *hdr)
{
	__be32 *p;
1665
	p = reserve_space(xdr, 4 + NFS4_MAX_SESSIONID_LEN);
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	*p++ = cpu_to_be32(OP_DESTROY_SESSION);
1667
	xdr_encode_opaque_fixed(p, session->sess_id.data, NFS4_MAX_SESSIONID_LEN);
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	hdr->nops++;
	hdr->replen += decode_destroy_session_maxsz;
}
1671 1672 1673 1674 1675 1676 1677 1678 1679 1680 1681 1682 1683

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 */

1686 1687 1688 1689 1690 1691
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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	struct nfs4_slot_table *tp;
	struct nfs4_slot *slot;
	__be32 *p;
1695 1696 1697 1698

	if (!session)
		return;

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	tp = &session->fc_slot_table;

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

1704
	p = reserve_space(xdr, 4 + NFS4_MAX_SESSIONID_LEN + 16);
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	*p++ = cpu_to_be32(OP_SEQUENCE);
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	/*
	 * 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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1719
	p = xdr_encode_opaque_fixed(p, session->sess_id.data, NFS4_MAX_SESSIONID_LEN);
B
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1720 1721 1722
	*p++ = cpu_to_be32(slot->seq_nr);
	*p++ = cpu_to_be32(args->sa_slotid);
	*p++ = cpu_to_be32(tp->highest_used_slotid);
1723
	*p = cpu_to_be32(args->sa_cache_this);
1724 1725 1726 1727 1728
	hdr->nops++;
	hdr->replen += decode_sequence_maxsz;
#endif /* CONFIG_NFS_V4_1 */
}

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

1733 1734 1735 1736
static u32 nfs4_xdr_minorversion(const struct nfs4_sequence_args *args)
{
#if defined(CONFIG_NFS_V4_1)
	if (args->sa_session)
1737
		return args->sa_session->clp->cl_mvops->minor_version;
1738 1739 1740 1741
#endif /* CONFIG_NFS_V4_1 */
	return 0;
}

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/*
 * Encode an ACCESS request
 */
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static int nfs4_xdr_enc_access(struct rpc_rqst *req, __be32 *p, const struct nfs4_accessargs *args)
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{
	struct xdr_stream xdr;
	struct compound_hdr hdr = {
1749
		.minorversion = nfs4_xdr_minorversion(&args->seq_args),
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	};

	xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1753
	encode_compound_hdr(&xdr, req, &hdr);
1754
	encode_sequence(&xdr, &args->seq_args, &hdr);
1755 1756 1757
	encode_putfh(&xdr, args->fh, &hdr);
	encode_access(&xdr, args->access, &hdr);
	encode_getfattr(&xdr, args->bitmask, &hdr);
1758
	encode_nops(&hdr);
1759
	return 0;
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}

/*
 * Encode LOOKUP request
 */
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static int nfs4_xdr_enc_lookup(struct rpc_rqst *req, __be32 *p, const struct nfs4_lookup_arg *args)
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{
	struct xdr_stream xdr;
	struct compound_hdr hdr = {
1769
		.minorversion = nfs4_xdr_minorversion(&args->seq_args),
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	};

	xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1773
	encode_compound_hdr(&xdr, req, &hdr);
1774
	encode_sequence(&xdr, &args->seq_args, &hdr);
1775 1776 1777 1778
	encode_putfh(&xdr, args->dir_fh, &hdr);
	encode_lookup(&xdr, args->name, &hdr);
	encode_getfh(&xdr, &hdr);
	encode_getfattr(&xdr, args->bitmask, &hdr);
1779
	encode_nops(&hdr);
1780
	return 0;
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}

/*
 * Encode LOOKUP_ROOT request
 */
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static int nfs4_xdr_enc_lookup_root(struct rpc_rqst *req, __be32 *p, const struct nfs4_lookup_root_arg *args)
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{
	struct xdr_stream xdr;
	struct compound_hdr hdr = {
1790
		.minorversion = nfs4_xdr_minorversion(&args->seq_args),
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	};

	xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1794
	encode_compound_hdr(&xdr, req, &hdr);
1795
	encode_sequence(&xdr, &args->seq_args, &hdr);
1796 1797 1798
	encode_putrootfh(&xdr, &hdr);
	encode_getfh(&xdr, &hdr);
	encode_getfattr(&xdr, args->bitmask, &hdr);
1799
	encode_nops(&hdr);
1800
	return 0;
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}

/*
 * Encode REMOVE request
 */
1806
static int nfs4_xdr_enc_remove(struct rpc_rqst *req, __be32 *p, const struct nfs_removeargs *args)
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{
	struct xdr_stream xdr;
	struct compound_hdr hdr = {
1810
		.minorversion = nfs4_xdr_minorversion(&args->seq_args),
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	};

	xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1814
	encode_compound_hdr(&xdr, req, &hdr);
1815
	encode_sequence(&xdr, &args->seq_args, &hdr);
1816 1817 1818
	encode_putfh(&xdr, args->fh, &hdr);
	encode_remove(&xdr, &args->name, &hdr);
	encode_getfattr(&xdr, args->bitmask, &hdr);
1819
	encode_nops(&hdr);
1820
	return 0;
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}

/*
 * Encode RENAME request
 */
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static int nfs4_xdr_enc_rename(struct rpc_rqst *req, __be32 *p, const struct nfs4_rename_arg *args)
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{
	struct xdr_stream xdr;
	struct compound_hdr hdr = {
1830
		.minorversion = nfs4_xdr_minorversion(&args->seq_args),
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	};

	xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1834
	encode_compound_hdr(&xdr, req, &hdr);
1835
	encode_sequence(&xdr, &args->seq_args, &hdr);
1836 1837 1838 1839 1840 1841 1842
	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);
1843
	encode_nops(&hdr);
1844
	return 0;
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}

/*
 * Encode LINK request
 */
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static int nfs4_xdr_enc_link(struct rpc_rqst *req, __be32 *p, const struct nfs4_link_arg *args)
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{
	struct xdr_stream xdr;
	struct compound_hdr hdr = {
1854
		.minorversion = nfs4_xdr_minorversion(&args->seq_args),
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	};

	xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1858
	encode_compound_hdr(&xdr, req, &hdr);
1859
	encode_sequence(&xdr, &args->seq_args, &hdr);
1860 1861 1862 1863 1864 1865 1866
	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);
1867
	encode_nops(&hdr);
1868
	return 0;
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}

/*
 * Encode CREATE request
 */
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static int nfs4_xdr_enc_create(struct rpc_rqst *req, __be32 *p, const struct nfs4_create_arg *args)
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{
	struct xdr_stream xdr;
	struct compound_hdr hdr = {
1878
		.minorversion = nfs4_xdr_minorversion(&args->seq_args),
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	};

	xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1882
	encode_compound_hdr(&xdr, req, &hdr);
1883
	encode_sequence(&xdr, &args->seq_args, &hdr);
1884 1885 1886 1887 1888 1889 1890
	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);
1891
	encode_nops(&hdr);
1892
	return 0;
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}

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

/*
 * Encode GETATTR request
 */
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static int nfs4_xdr_enc_getattr(struct rpc_rqst *req, __be32 *p, const struct nfs4_getattr_arg *args)
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{
	struct xdr_stream xdr;
	struct compound_hdr hdr = {
1910
		.minorversion = nfs4_xdr_minorversion(&args->seq_args),
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	};

	xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1914
	encode_compound_hdr(&xdr, req, &hdr);
1915
	encode_sequence(&xdr, &args->seq_args, &hdr);
1916 1917
	encode_putfh(&xdr, args->fh, &hdr);
	encode_getfattr(&xdr, args->bitmask, &hdr);
1918
	encode_nops(&hdr);
1919
	return 0;
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}

/*
 * Encode a CLOSE request
 */
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static int nfs4_xdr_enc_close(struct rpc_rqst *req, __be32 *p, struct nfs_closeargs *args)
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{
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	struct xdr_stream xdr;
	struct compound_hdr hdr = {
1929
		.minorversion = nfs4_xdr_minorversion(&args->seq_args),
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	};

	xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1933
	encode_compound_hdr(&xdr, req, &hdr);
1934
	encode_sequence(&xdr, &args->seq_args, &hdr);
1935 1936 1937
	encode_putfh(&xdr, args->fh, &hdr);
	encode_close(&xdr, args, &hdr);
	encode_getfattr(&xdr, args->bitmask, &hdr);
1938
	encode_nops(&hdr);
1939
	return 0;
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}

/*
 * Encode an OPEN request
 */
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static int nfs4_xdr_enc_open(struct rpc_rqst *req, __be32 *p, struct nfs_openargs *args)
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{
	struct xdr_stream xdr;
	struct compound_hdr hdr = {
1949
		.minorversion = nfs4_xdr_minorversion(&args->seq_args),
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	};

	xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1953
	encode_compound_hdr(&xdr, req, &hdr);
1954
	encode_sequence(&xdr, &args->seq_args, &hdr);
1955 1956 1957 1958 1959 1960 1961
	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);
1962
	encode_nops(&hdr);
1963
	return 0;
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}

/*
 * Encode an OPEN_CONFIRM request
 */
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static int nfs4_xdr_enc_open_confirm(struct rpc_rqst *req, __be32 *p, struct nfs_open_confirmargs *args)
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{
	struct xdr_stream xdr;
	struct compound_hdr hdr = {
1973
		.nops   = 0,
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	};

	xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1977
	encode_compound_hdr(&xdr, req, &hdr);
1978 1979
	encode_putfh(&xdr, args->fh, &hdr);
	encode_open_confirm(&xdr, args, &hdr);
1980
	encode_nops(&hdr);
1981
	return 0;
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}

/*
 * Encode an OPEN request with no attributes.
 */
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static int nfs4_xdr_enc_open_noattr(struct rpc_rqst *req, __be32 *p, struct nfs_openargs *args)
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{
	struct xdr_stream xdr;
	struct compound_hdr hdr = {
1991
		.minorversion = nfs4_xdr_minorversion(&args->seq_args),
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	};

	xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1995
	encode_compound_hdr(&xdr, req, &hdr);
1996
	encode_sequence(&xdr, &args->seq_args, &hdr);
1997 1998 1999
	encode_putfh(&xdr, args->fh, &hdr);
	encode_open(&xdr, args, &hdr);
	encode_getfattr(&xdr, args->bitmask, &hdr);
2000
	encode_nops(&hdr);
2001
	return 0;
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}

/*
 * Encode an OPEN_DOWNGRADE request
 */
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static int nfs4_xdr_enc_open_downgrade(struct rpc_rqst *req, __be32 *p, struct nfs_closeargs *args)
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{
	struct xdr_stream xdr;
	struct compound_hdr hdr = {
2011
		.minorversion = nfs4_xdr_minorversion(&args->seq_args),
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2012 2013 2014
	};

	xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2015
	encode_compound_hdr(&xdr, req, &hdr);
2016
	encode_sequence(&xdr, &args->seq_args, &hdr);
2017 2018 2019
	encode_putfh(&xdr, args->fh, &hdr);
	encode_open_downgrade(&xdr, args, &hdr);
	encode_getfattr(&xdr, args->bitmask, &hdr);
2020
	encode_nops(&hdr);
2021
	return 0;
L
Linus Torvalds 已提交
2022 2023 2024 2025 2026
}

/*
 * Encode a LOCK request
 */
A
Al Viro 已提交
2027
static int nfs4_xdr_enc_lock(struct rpc_rqst *req, __be32 *p, struct nfs_lock_args *args)
L
Linus Torvalds 已提交
2028 2029 2030
{
	struct xdr_stream xdr;
	struct compound_hdr hdr = {
2031
		.minorversion = nfs4_xdr_minorversion(&args->seq_args),
L
Linus Torvalds 已提交
2032 2033 2034
	};

	xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2035
	encode_compound_hdr(&xdr, req, &hdr);
2036
	encode_sequence(&xdr, &args->seq_args, &hdr);
2037 2038
	encode_putfh(&xdr, args->fh, &hdr);
	encode_lock(&xdr, args, &hdr);
2039
	encode_nops(&hdr);
2040
	return 0;
L
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2041 2042 2043 2044 2045
}

/*
 * Encode a LOCKT request
 */
A
Al Viro 已提交
2046
static int nfs4_xdr_enc_lockt(struct rpc_rqst *req, __be32 *p, struct nfs_lockt_args *args)
L
Linus Torvalds 已提交
2047 2048 2049
{
	struct xdr_stream xdr;
	struct compound_hdr hdr = {
2050
		.minorversion = nfs4_xdr_minorversion(&args->seq_args),
L
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2051 2052 2053
	};

	xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2054
	encode_compound_hdr(&xdr, req, &hdr);
2055
	encode_sequence(&xdr, &args->seq_args, &hdr);
2056 2057
	encode_putfh(&xdr, args->fh, &hdr);
	encode_lockt(&xdr, args, &hdr);
2058
	encode_nops(&hdr);
2059
	return 0;
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}

/*
 * Encode a LOCKU request
 */
A
Al Viro 已提交
2065
static int nfs4_xdr_enc_locku(struct rpc_rqst *req, __be32 *p, struct nfs_locku_args *args)
L
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2066 2067 2068
{
	struct xdr_stream xdr;
	struct compound_hdr hdr = {
2069
		.minorversion = nfs4_xdr_minorversion(&args->seq_args),
L
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2070 2071 2072
	};

	xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2073
	encode_compound_hdr(&xdr, req, &hdr);
2074
	encode_sequence(&xdr, &args->seq_args, &hdr);
2075 2076
	encode_putfh(&xdr, args->fh, &hdr);
	encode_locku(&xdr, args, &hdr);
2077
	encode_nops(&hdr);
2078
	return 0;
L
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}

2081 2082 2083 2084 2085 2086 2087 2088 2089 2090 2091 2092 2093 2094
static int nfs4_xdr_enc_release_lockowner(struct rpc_rqst *req, __be32 *p, struct nfs_release_lockowner_args *args)
{
	struct xdr_stream xdr;
	struct compound_hdr hdr = {
		.minorversion = 0,
	};

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

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/*
 * Encode a READLINK request
 */
A
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static int nfs4_xdr_enc_readlink(struct rpc_rqst *req, __be32 *p, const struct nfs4_readlink *args)
L
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2099 2100 2101
{
	struct xdr_stream xdr;
	struct compound_hdr hdr = {
2102
		.minorversion = nfs4_xdr_minorversion(&args->seq_args),
L
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2103 2104 2105
	};

	xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2106
	encode_compound_hdr(&xdr, req, &hdr);
2107
	encode_sequence(&xdr, &args->seq_args, &hdr);
2108 2109
	encode_putfh(&xdr, args->fh, &hdr);
	encode_readlink(&xdr, args, req, &hdr);
2110

2111
	xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2, args->pages,
2112
			args->pgbase, args->pglen);
2113
	encode_nops(&hdr);
2114
	return 0;
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2115 2116 2117 2118 2119
}

/*
 * Encode a READDIR request
 */
A
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2120
static int nfs4_xdr_enc_readdir(struct rpc_rqst *req, __be32 *p, const struct nfs4_readdir_arg *args)
L
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{
	struct xdr_stream xdr;
	struct compound_hdr hdr = {
2124
		.minorversion = nfs4_xdr_minorversion(&args->seq_args),
L
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	};

	xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2128
	encode_compound_hdr(&xdr, req, &hdr);
2129
	encode_sequence(&xdr, &args->seq_args, &hdr);
2130 2131
	encode_putfh(&xdr, args->fh, &hdr);
	encode_readdir(&xdr, args, req, &hdr);
2132

2133
	xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2, args->pages,
2134 2135
			 args->pgbase, args->count);
	dprintk("%s: inlined page args = (%u, %p, %u, %u)\n",
2136
			__func__, hdr.replen << 2, args->pages,
2137
			args->pgbase, args->count);
2138
	encode_nops(&hdr);
2139
	return 0;
L
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}

/*
 * Encode a READ request
 */
A
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static int nfs4_xdr_enc_read(struct rpc_rqst *req, __be32 *p, struct nfs_readargs *args)
L
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{
	struct xdr_stream xdr;
	struct compound_hdr hdr = {
2149
		.minorversion = nfs4_xdr_minorversion(&args->seq_args),
L
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2150 2151 2152
	};

	xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2153
	encode_compound_hdr(&xdr, req, &hdr);
2154
	encode_sequence(&xdr, &args->seq_args, &hdr);
2155 2156
	encode_putfh(&xdr, args->fh, &hdr);
	encode_read(&xdr, args, &hdr);
L
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2158
	xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2,
L
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2159
			 args->pages, args->pgbase, args->count);
2160
	req->rq_rcv_buf.flags |= XDRBUF_READ;
2161
	encode_nops(&hdr);
2162
	return 0;
L
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}

/*
 * Encode an SETATTR request
 */
A
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static int nfs4_xdr_enc_setattr(struct rpc_rqst *req, __be32 *p, struct nfs_setattrargs *args)
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{
A
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	struct xdr_stream xdr;
	struct compound_hdr hdr = {
2172
		.minorversion = nfs4_xdr_minorversion(&args->seq_args),
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2173 2174 2175
	};

	xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2176
	encode_compound_hdr(&xdr, req, &hdr);
2177
	encode_sequence(&xdr, &args->seq_args, &hdr);
2178 2179 2180
	encode_putfh(&xdr, args->fh, &hdr);
	encode_setattr(&xdr, args, args->server, &hdr);
	encode_getfattr(&xdr, args->bitmask, &hdr);
2181
	encode_nops(&hdr);
2182
	return 0;
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}

2185 2186 2187 2188
/*
 * Encode a GETACL request
 */
static int
A
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nfs4_xdr_enc_getacl(struct rpc_rqst *req, __be32 *p,
2190 2191 2192 2193
		struct nfs_getaclargs *args)
{
	struct xdr_stream xdr;
	struct compound_hdr hdr = {
2194
		.minorversion = nfs4_xdr_minorversion(&args->seq_args),
2195
	};
2196
	uint32_t replen;
2197 2198

	xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2199
	encode_compound_hdr(&xdr, req, &hdr);
2200
	encode_sequence(&xdr, &args->seq_args, &hdr);
2201
	encode_putfh(&xdr, args->fh, &hdr);
2202
	replen = hdr.replen + op_decode_hdr_maxsz + nfs4_fattr_bitmap_maxsz + 1;
2203 2204
	encode_getattr_two(&xdr, FATTR4_WORD0_ACL, 0, &hdr);

2205
	xdr_inline_pages(&req->rq_rcv_buf, replen << 2,
2206
		args->acl_pages, args->acl_pgbase, args->acl_len);
2207
	encode_nops(&hdr);
2208
	return 0;
2209 2210
}

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/*
 * Encode a WRITE request
 */
A
Al Viro 已提交
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static int nfs4_xdr_enc_write(struct rpc_rqst *req, __be32 *p, struct nfs_writeargs *args)
L
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{
	struct xdr_stream xdr;
	struct compound_hdr hdr = {
2218
		.minorversion = nfs4_xdr_minorversion(&args->seq_args),
L
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	};

	xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2222
	encode_compound_hdr(&xdr, req, &hdr);
2223
	encode_sequence(&xdr, &args->seq_args, &hdr);
2224 2225
	encode_putfh(&xdr, args->fh, &hdr);
	encode_write(&xdr, args, &hdr);
2226
	req->rq_snd_buf.flags |= XDRBUF_WRITE;
2227
	encode_getfattr(&xdr, args->bitmask, &hdr);
2228
	encode_nops(&hdr);
2229
	return 0;
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}

/*
 *  a COMMIT request
 */
A
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static int nfs4_xdr_enc_commit(struct rpc_rqst *req, __be32 *p, struct nfs_writeargs *args)
L
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{
	struct xdr_stream xdr;
	struct compound_hdr hdr = {
2239
		.minorversion = nfs4_xdr_minorversion(&args->seq_args),
L
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	};

	xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2243
	encode_compound_hdr(&xdr, req, &hdr);
2244
	encode_sequence(&xdr, &args->seq_args, &hdr);
2245 2246 2247
	encode_putfh(&xdr, args->fh, &hdr);
	encode_commit(&xdr, args, &hdr);
	encode_getfattr(&xdr, args->bitmask, &hdr);
2248
	encode_nops(&hdr);
2249
	return 0;
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}

/*
 * FSINFO request
 */
A
Al Viro 已提交
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static int nfs4_xdr_enc_fsinfo(struct rpc_rqst *req, __be32 *p, struct nfs4_fsinfo_arg *args)
L
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{
	struct xdr_stream xdr;
	struct compound_hdr hdr = {
2259
		.minorversion = nfs4_xdr_minorversion(&args->seq_args),
L
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	};

	xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2263
	encode_compound_hdr(&xdr, req, &hdr);
2264
	encode_sequence(&xdr, &args->seq_args, &hdr);
2265 2266
	encode_putfh(&xdr, args->fh, &hdr);
	encode_fsinfo(&xdr, args->bitmask, &hdr);
2267
	encode_nops(&hdr);
2268
	return 0;
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}

/*
 * a PATHCONF request
 */
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Al Viro 已提交
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static int nfs4_xdr_enc_pathconf(struct rpc_rqst *req, __be32 *p, const struct nfs4_pathconf_arg *args)
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{
	struct xdr_stream xdr;
	struct compound_hdr hdr = {
2278
		.minorversion = nfs4_xdr_minorversion(&args->seq_args),
L
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	};

	xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2282
	encode_compound_hdr(&xdr, req, &hdr);
2283
	encode_sequence(&xdr, &args->seq_args, &hdr);
2284 2285 2286
	encode_putfh(&xdr, args->fh, &hdr);
	encode_getattr_one(&xdr, args->bitmask[0] & nfs4_pathconf_bitmap[0],
			   &hdr);
2287
	encode_nops(&hdr);
2288
	return 0;
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}

/*
 * a STATFS request
 */
A
Al Viro 已提交
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static int nfs4_xdr_enc_statfs(struct rpc_rqst *req, __be32 *p, const struct nfs4_statfs_arg *args)
L
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2295 2296 2297
{
	struct xdr_stream xdr;
	struct compound_hdr hdr = {
2298
		.minorversion = nfs4_xdr_minorversion(&args->seq_args),
L
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	};

	xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2302
	encode_compound_hdr(&xdr, req, &hdr);
2303
	encode_sequence(&xdr, &args->seq_args, &hdr);
2304 2305 2306
	encode_putfh(&xdr, args->fh, &hdr);
	encode_getattr_two(&xdr, args->bitmask[0] & nfs4_statfs_bitmap[0],
			   args->bitmask[1] & nfs4_statfs_bitmap[1], &hdr);
2307
	encode_nops(&hdr);
2308
	return 0;
L
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}

/*
 * GETATTR_BITMAP request
 */
B
Benny Halevy 已提交
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static int nfs4_xdr_enc_server_caps(struct rpc_rqst *req, __be32 *p,
				    struct nfs4_server_caps_arg *args)
L
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2316 2317 2318
{
	struct xdr_stream xdr;
	struct compound_hdr hdr = {
2319
		.minorversion = nfs4_xdr_minorversion(&args->seq_args),
L
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2320 2321 2322
	};

	xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2323
	encode_compound_hdr(&xdr, req, &hdr);
2324
	encode_sequence(&xdr, &args->seq_args, &hdr);
B
Benny Halevy 已提交
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	encode_putfh(&xdr, args->fhandle, &hdr);
2326 2327 2328 2329
	encode_getattr_one(&xdr, FATTR4_WORD0_SUPPORTED_ATTRS|
			   FATTR4_WORD0_LINK_SUPPORT|
			   FATTR4_WORD0_SYMLINK_SUPPORT|
			   FATTR4_WORD0_ACLSUPPORT, &hdr);
2330
	encode_nops(&hdr);
2331
	return 0;
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}

/*
 * a RENEW request
 */
A
Al Viro 已提交
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static int nfs4_xdr_enc_renew(struct rpc_rqst *req, __be32 *p, struct nfs_client *clp)
L
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2338 2339 2340
{
	struct xdr_stream xdr;
	struct compound_hdr hdr = {
2341
		.nops	= 0,
L
Linus Torvalds 已提交
2342 2343 2344
	};

	xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2345
	encode_compound_hdr(&xdr, req, &hdr);
2346
	encode_renew(&xdr, clp, &hdr);
2347
	encode_nops(&hdr);
2348
	return 0;
L
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2349 2350 2351 2352 2353
}

/*
 * a SETCLIENTID request
 */
A
Al Viro 已提交
2354
static int nfs4_xdr_enc_setclientid(struct rpc_rqst *req, __be32 *p, struct nfs4_setclientid *sc)
L
Linus Torvalds 已提交
2355 2356 2357
{
	struct xdr_stream xdr;
	struct compound_hdr hdr = {
2358
		.nops	= 0,
L
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2359 2360 2361
	};

	xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2362
	encode_compound_hdr(&xdr, req, &hdr);
2363
	encode_setclientid(&xdr, sc, &hdr);
2364
	encode_nops(&hdr);
2365
	return 0;
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}

/*
 * a SETCLIENTID_CONFIRM request
 */
2371
static int nfs4_xdr_enc_setclientid_confirm(struct rpc_rqst *req, __be32 *p, struct nfs4_setclientid_res *arg)
L
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{
	struct xdr_stream xdr;
	struct compound_hdr hdr = {
2375
		.nops	= 0,
L
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	};
	const u32 lease_bitmap[2] = { FATTR4_WORD0_LEASE_TIME, 0 };

	xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2380
	encode_compound_hdr(&xdr, req, &hdr);
2381
	encode_setclientid_confirm(&xdr, arg, &hdr);
2382 2383
	encode_putrootfh(&xdr, &hdr);
	encode_fsinfo(&xdr, lease_bitmap, &hdr);
2384
	encode_nops(&hdr);
2385
	return 0;
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}

/*
 * DELEGRETURN request
 */
A
Al Viro 已提交
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static int nfs4_xdr_enc_delegreturn(struct rpc_rqst *req, __be32 *p, const struct nfs4_delegreturnargs *args)
L
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2392 2393 2394
{
	struct xdr_stream xdr;
	struct compound_hdr hdr = {
2395
		.minorversion = nfs4_xdr_minorversion(&args->seq_args),
L
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	};

	xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2399
	encode_compound_hdr(&xdr, req, &hdr);
2400
	encode_sequence(&xdr, &args->seq_args, &hdr);
2401 2402 2403
	encode_putfh(&xdr, args->fhandle, &hdr);
	encode_delegreturn(&xdr, args->stateid, &hdr);
	encode_getfattr(&xdr, args->bitmask, &hdr);
2404
	encode_nops(&hdr);
2405
	return 0;
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}

2408 2409 2410
/*
 * Encode FS_LOCATIONS request
 */
A
Al Viro 已提交
2411
static int nfs4_xdr_enc_fs_locations(struct rpc_rqst *req, __be32 *p, struct nfs4_fs_locations_arg *args)
2412 2413 2414
{
	struct xdr_stream xdr;
	struct compound_hdr hdr = {
2415
		.minorversion = nfs4_xdr_minorversion(&args->seq_args),
2416
	};
2417
	uint32_t replen;
2418 2419

	xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2420
	encode_compound_hdr(&xdr, req, &hdr);
2421
	encode_sequence(&xdr, &args->seq_args, &hdr);
2422 2423
	encode_putfh(&xdr, args->dir_fh, &hdr);
	encode_lookup(&xdr, args->name, &hdr);
2424
	replen = hdr.replen;	/* get the attribute into args->page */
2425 2426
	encode_fs_locations(&xdr, args->bitmask, &hdr);

2427
	xdr_inline_pages(&req->rq_rcv_buf, replen << 2, &args->page,
2428
			0, PAGE_SIZE);
2429
	encode_nops(&hdr);
2430
	return 0;
2431 2432
}

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#if defined(CONFIG_NFS_V4_1)
/*
 * EXCHANGE_ID request
 */
static int nfs4_xdr_enc_exchange_id(struct rpc_rqst *req, uint32_t *p,
				    struct nfs41_exchange_id_args *args)
{
	struct xdr_stream xdr;
	struct compound_hdr hdr = {
2442
		.minorversion = args->client->cl_mvops->minor_version,
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	};

	xdr_init_encode(&xdr, &req->rq_snd_buf, p);
	encode_compound_hdr(&xdr, req, &hdr);
	encode_exchange_id(&xdr, args, &hdr);
	encode_nops(&hdr);
	return 0;
}
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Andy Adamson 已提交
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/*
 * a CREATE_SESSION request
 */
static int nfs4_xdr_enc_create_session(struct rpc_rqst *req, uint32_t *p,
				       struct nfs41_create_session_args *args)
{
	struct xdr_stream xdr;
	struct compound_hdr hdr = {
2460
		.minorversion = args->client->cl_mvops->minor_version,
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Andy Adamson 已提交
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	};

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

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Andy Adamson 已提交
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/*
 * a DESTROY_SESSION request
 */
static int nfs4_xdr_enc_destroy_session(struct rpc_rqst *req, uint32_t *p,
					struct nfs4_session *session)
{
	struct xdr_stream xdr;
	struct compound_hdr hdr = {
2478
		.minorversion = session->clp->cl_mvops->minor_version,
A
Andy Adamson 已提交
2479 2480 2481 2482 2483 2484 2485 2486 2487
	};

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

A
Andy Adamson 已提交
2488 2489 2490 2491 2492 2493 2494 2495 2496 2497 2498 2499 2500 2501 2502 2503 2504 2505
/*
 * a SEQUENCE request
 */
static int nfs4_xdr_enc_sequence(struct rpc_rqst *req, uint32_t *p,
				 struct nfs4_sequence_args *args)
{
	struct xdr_stream xdr;
	struct compound_hdr hdr = {
		.minorversion = nfs4_xdr_minorversion(args),
	};

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

A
Andy Adamson 已提交
2506 2507 2508 2509 2510 2511 2512 2513 2514 2515 2516 2517 2518 2519 2520 2521 2522 2523 2524 2525
/*
 * a GET_LEASE_TIME request
 */
static int nfs4_xdr_enc_get_lease_time(struct rpc_rqst *req, uint32_t *p,
				       struct nfs4_get_lease_time_args *args)
{
	struct xdr_stream xdr;
	struct compound_hdr hdr = {
		.minorversion = nfs4_xdr_minorversion(&args->la_seq_args),
	};
	const u32 lease_bitmap[2] = { FATTR4_WORD0_LEASE_TIME, 0 };

	xdr_init_encode(&xdr, &req->rq_snd_buf, p);
	encode_compound_hdr(&xdr, req, &hdr);
	encode_sequence(&xdr, &args->la_seq_args, &hdr);
	encode_putrootfh(&xdr, &hdr);
	encode_fsinfo(&xdr, lease_bitmap, &hdr);
	encode_nops(&hdr);
	return 0;
}
2526 2527 2528 2529 2530 2531 2532 2533 2534 2535 2536 2537 2538 2539 2540 2541 2542 2543 2544 2545

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

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

B
Benny Halevy 已提交
2546 2547
#endif /* CONFIG_NFS_V4_1 */

2548 2549 2550 2551 2552 2553
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
2554

2555
static int decode_opaque_inline(struct xdr_stream *xdr, unsigned int *len, char **string)
L
Linus Torvalds 已提交
2556
{
A
Al Viro 已提交
2557
	__be32 *p;
L
Linus Torvalds 已提交
2558

B
Benny Halevy 已提交
2559 2560 2561
	p = xdr_inline_decode(xdr, 4);
	if (unlikely(!p))
		goto out_overflow;
2562
	*len = be32_to_cpup(p);
B
Benny Halevy 已提交
2563 2564 2565
	p = xdr_inline_decode(xdr, *len);
	if (unlikely(!p))
		goto out_overflow;
L
Linus Torvalds 已提交
2566 2567
	*string = (char *)p;
	return 0;
B
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2568 2569 2570
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
L
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2571 2572 2573 2574
}

static int decode_compound_hdr(struct xdr_stream *xdr, struct compound_hdr *hdr)
{
A
Al Viro 已提交
2575
	__be32 *p;
L
Linus Torvalds 已提交
2576

B
Benny Halevy 已提交
2577 2578 2579
	p = xdr_inline_decode(xdr, 8);
	if (unlikely(!p))
		goto out_overflow;
B
Benny Halevy 已提交
2580
	hdr->status = be32_to_cpup(p++);
2581
	hdr->taglen = be32_to_cpup(p);
2582

B
Benny Halevy 已提交
2583 2584 2585
	p = xdr_inline_decode(xdr, hdr->taglen + 4);
	if (unlikely(!p))
		goto out_overflow;
L
Linus Torvalds 已提交
2586 2587
	hdr->tag = (char *)p;
	p += XDR_QUADLEN(hdr->taglen);
2588
	hdr->nops = be32_to_cpup(p);
2589 2590
	if (unlikely(hdr->nops < 1))
		return nfs4_stat_to_errno(hdr->status);
L
Linus Torvalds 已提交
2591
	return 0;
B
Benny Halevy 已提交
2592 2593 2594
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
L
Linus Torvalds 已提交
2595 2596 2597 2598
}

static int decode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 expected)
{
A
Al Viro 已提交
2599
	__be32 *p;
L
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2600 2601 2602
	uint32_t opnum;
	int32_t nfserr;

B
Benny Halevy 已提交
2603 2604 2605
	p = xdr_inline_decode(xdr, 8);
	if (unlikely(!p))
		goto out_overflow;
B
Benny Halevy 已提交
2606
	opnum = be32_to_cpup(p++);
L
Linus Torvalds 已提交
2607
	if (opnum != expected) {
2608 2609
		dprintk("nfs: Server returned operation"
			" %d but we issued a request for %d\n",
L
Linus Torvalds 已提交
2610 2611 2612
				opnum, expected);
		return -EIO;
	}
2613
	nfserr = be32_to_cpup(p);
L
Linus Torvalds 已提交
2614
	if (nfserr != NFS_OK)
2615
		return nfs4_stat_to_errno(nfserr);
L
Linus Torvalds 已提交
2616
	return 0;
B
Benny Halevy 已提交
2617 2618 2619
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
L
Linus Torvalds 已提交
2620 2621 2622
}

/* Dummy routine */
2623
static int decode_ace(struct xdr_stream *xdr, void *ace, struct nfs_client *clp)
L
Linus Torvalds 已提交
2624
{
A
Al Viro 已提交
2625
	__be32 *p;
2626
	unsigned int strlen;
L
Linus Torvalds 已提交
2627 2628
	char *str;

B
Benny Halevy 已提交
2629 2630 2631 2632 2633
	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
2634 2635 2636 2637
}

static int decode_attr_bitmap(struct xdr_stream *xdr, uint32_t *bitmap)
{
A
Al Viro 已提交
2638 2639
	uint32_t bmlen;
	__be32 *p;
L
Linus Torvalds 已提交
2640

B
Benny Halevy 已提交
2641 2642 2643
	p = xdr_inline_decode(xdr, 4);
	if (unlikely(!p))
		goto out_overflow;
2644
	bmlen = be32_to_cpup(p);
L
Linus Torvalds 已提交
2645 2646

	bitmap[0] = bitmap[1] = 0;
B
Benny Halevy 已提交
2647 2648 2649
	p = xdr_inline_decode(xdr, (bmlen << 2));
	if (unlikely(!p))
		goto out_overflow;
L
Linus Torvalds 已提交
2650
	if (bmlen > 0) {
B
Benny Halevy 已提交
2651
		bitmap[0] = be32_to_cpup(p++);
L
Linus Torvalds 已提交
2652
		if (bmlen > 1)
2653
			bitmap[1] = be32_to_cpup(p);
L
Linus Torvalds 已提交
2654 2655
	}
	return 0;
B
Benny Halevy 已提交
2656 2657 2658
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
L
Linus Torvalds 已提交
2659 2660
}

A
Al Viro 已提交
2661
static inline int decode_attr_length(struct xdr_stream *xdr, uint32_t *attrlen, __be32 **savep)
L
Linus Torvalds 已提交
2662
{
A
Al Viro 已提交
2663
	__be32 *p;
L
Linus Torvalds 已提交
2664

B
Benny Halevy 已提交
2665 2666 2667
	p = xdr_inline_decode(xdr, 4);
	if (unlikely(!p))
		goto out_overflow;
2668
	*attrlen = be32_to_cpup(p);
L
Linus Torvalds 已提交
2669 2670
	*savep = xdr->p;
	return 0;
B
Benny Halevy 已提交
2671 2672 2673
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
L
Linus Torvalds 已提交
2674 2675 2676 2677 2678 2679 2680 2681 2682
}

static int decode_attr_supported(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *bitmask)
{
	if (likely(bitmap[0] & FATTR4_WORD0_SUPPORTED_ATTRS)) {
		decode_attr_bitmap(xdr, bitmask);
		bitmap[0] &= ~FATTR4_WORD0_SUPPORTED_ATTRS;
	} else
		bitmask[0] = bitmask[1] = 0;
2683
	dprintk("%s: bitmask=%08x:%08x\n", __func__, bitmask[0], bitmask[1]);
L
Linus Torvalds 已提交
2684 2685 2686 2687 2688
	return 0;
}

static int decode_attr_type(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *type)
{
A
Al Viro 已提交
2689
	__be32 *p;
2690
	int ret = 0;
L
Linus Torvalds 已提交
2691 2692 2693 2694 2695

	*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
2696 2697 2698
		p = xdr_inline_decode(xdr, 4);
		if (unlikely(!p))
			goto out_overflow;
2699
		*type = be32_to_cpup(p);
L
Linus Torvalds 已提交
2700
		if (*type < NF4REG || *type > NF4NAMEDATTR) {
2701
			dprintk("%s: bad type %d\n", __func__, *type);
L
Linus Torvalds 已提交
2702 2703 2704
			return -EIO;
		}
		bitmap[0] &= ~FATTR4_WORD0_TYPE;
2705
		ret = NFS_ATTR_FATTR_TYPE;
L
Linus Torvalds 已提交
2706
	}
2707
	dprintk("%s: type=0%o\n", __func__, nfs_type2fmt[*type]);
2708
	return ret;
B
Benny Halevy 已提交
2709 2710 2711
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
L
Linus Torvalds 已提交
2712 2713 2714 2715
}

static int decode_attr_change(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *change)
{
A
Al Viro 已提交
2716
	__be32 *p;
2717
	int ret = 0;
L
Linus Torvalds 已提交
2718 2719 2720 2721 2722

	*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
2723 2724 2725
		p = xdr_inline_decode(xdr, 8);
		if (unlikely(!p))
			goto out_overflow;
2726
		xdr_decode_hyper(p, change);
L
Linus Torvalds 已提交
2727
		bitmap[0] &= ~FATTR4_WORD0_CHANGE;
2728
		ret = NFS_ATTR_FATTR_CHANGE;
L
Linus Torvalds 已提交
2729
	}
2730
	dprintk("%s: change attribute=%Lu\n", __func__,
L
Linus Torvalds 已提交
2731
			(unsigned long long)*change);
2732
	return ret;
B
Benny Halevy 已提交
2733 2734 2735
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
L
Linus Torvalds 已提交
2736 2737 2738 2739
}

static int decode_attr_size(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *size)
{
A
Al Viro 已提交
2740
	__be32 *p;
2741
	int ret = 0;
L
Linus Torvalds 已提交
2742 2743 2744 2745 2746

	*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
2747 2748 2749
		p = xdr_inline_decode(xdr, 8);
		if (unlikely(!p))
			goto out_overflow;
2750
		xdr_decode_hyper(p, size);
L
Linus Torvalds 已提交
2751
		bitmap[0] &= ~FATTR4_WORD0_SIZE;
2752
		ret = NFS_ATTR_FATTR_SIZE;
L
Linus Torvalds 已提交
2753
	}
2754
	dprintk("%s: file size=%Lu\n", __func__, (unsigned long long)*size);
2755
	return ret;
B
Benny Halevy 已提交
2756 2757 2758
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
L
Linus Torvalds 已提交
2759 2760 2761 2762
}

static int decode_attr_link_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
{
A
Al Viro 已提交
2763
	__be32 *p;
L
Linus Torvalds 已提交
2764 2765 2766 2767 2768

	*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
2769 2770 2771
		p = xdr_inline_decode(xdr, 4);
		if (unlikely(!p))
			goto out_overflow;
2772
		*res = be32_to_cpup(p);
L
Linus Torvalds 已提交
2773 2774
		bitmap[0] &= ~FATTR4_WORD0_LINK_SUPPORT;
	}
2775
	dprintk("%s: link support=%s\n", __func__, *res == 0 ? "false" : "true");
L
Linus Torvalds 已提交
2776
	return 0;
B
Benny Halevy 已提交
2777 2778 2779
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
L
Linus Torvalds 已提交
2780 2781 2782 2783
}

static int decode_attr_symlink_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
{
A
Al Viro 已提交
2784
	__be32 *p;
L
Linus Torvalds 已提交
2785 2786 2787 2788 2789

	*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
2790 2791 2792
		p = xdr_inline_decode(xdr, 4);
		if (unlikely(!p))
			goto out_overflow;
2793
		*res = be32_to_cpup(p);
L
Linus Torvalds 已提交
2794 2795
		bitmap[0] &= ~FATTR4_WORD0_SYMLINK_SUPPORT;
	}
2796
	dprintk("%s: symlink support=%s\n", __func__, *res == 0 ? "false" : "true");
L
Linus Torvalds 已提交
2797
	return 0;
B
Benny Halevy 已提交
2798 2799 2800
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
L
Linus Torvalds 已提交
2801 2802
}

2803
static int decode_attr_fsid(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_fsid *fsid)
L
Linus Torvalds 已提交
2804
{
A
Al Viro 已提交
2805
	__be32 *p;
2806
	int ret = 0;
L
Linus Torvalds 已提交
2807 2808 2809 2810 2811 2812

	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
2813 2814 2815
		p = xdr_inline_decode(xdr, 16);
		if (unlikely(!p))
			goto out_overflow;
B
Benny Halevy 已提交
2816
		p = xdr_decode_hyper(p, &fsid->major);
2817
		xdr_decode_hyper(p, &fsid->minor);
L
Linus Torvalds 已提交
2818
		bitmap[0] &= ~FATTR4_WORD0_FSID;
2819
		ret = NFS_ATTR_FATTR_FSID;
L
Linus Torvalds 已提交
2820
	}
2821
	dprintk("%s: fsid=(0x%Lx/0x%Lx)\n", __func__,
L
Linus Torvalds 已提交
2822 2823
			(unsigned long long)fsid->major,
			(unsigned long long)fsid->minor);
2824
	return ret;
B
Benny Halevy 已提交
2825 2826 2827
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
L
Linus Torvalds 已提交
2828 2829 2830 2831
}

static int decode_attr_lease_time(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
{
A
Al Viro 已提交
2832
	__be32 *p;
L
Linus Torvalds 已提交
2833 2834 2835 2836 2837

	*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
2838 2839 2840
		p = xdr_inline_decode(xdr, 4);
		if (unlikely(!p))
			goto out_overflow;
2841
		*res = be32_to_cpup(p);
L
Linus Torvalds 已提交
2842 2843
		bitmap[0] &= ~FATTR4_WORD0_LEASE_TIME;
	}
2844
	dprintk("%s: file size=%u\n", __func__, (unsigned int)*res);
L
Linus Torvalds 已提交
2845
	return 0;
B
Benny Halevy 已提交
2846 2847 2848
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
L
Linus Torvalds 已提交
2849 2850 2851 2852
}

static int decode_attr_aclsupport(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
{
A
Al Viro 已提交
2853
	__be32 *p;
L
Linus Torvalds 已提交
2854 2855 2856 2857 2858

	*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
2859 2860 2861
		p = xdr_inline_decode(xdr, 4);
		if (unlikely(!p))
			goto out_overflow;
2862
		*res = be32_to_cpup(p);
L
Linus Torvalds 已提交
2863 2864
		bitmap[0] &= ~FATTR4_WORD0_ACLSUPPORT;
	}
2865
	dprintk("%s: ACLs supported=%u\n", __func__, (unsigned int)*res);
L
Linus Torvalds 已提交
2866
	return 0;
B
Benny Halevy 已提交
2867 2868 2869
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
L
Linus Torvalds 已提交
2870 2871 2872 2873
}

static int decode_attr_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
{
A
Al Viro 已提交
2874
	__be32 *p;
2875
	int ret = 0;
L
Linus Torvalds 已提交
2876 2877 2878 2879 2880

	*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
2881 2882 2883
		p = xdr_inline_decode(xdr, 8);
		if (unlikely(!p))
			goto out_overflow;
2884
		xdr_decode_hyper(p, fileid);
L
Linus Torvalds 已提交
2885
		bitmap[0] &= ~FATTR4_WORD0_FILEID;
2886
		ret = NFS_ATTR_FATTR_FILEID;
L
Linus Torvalds 已提交
2887
	}
2888
	dprintk("%s: fileid=%Lu\n", __func__, (unsigned long long)*fileid);
2889
	return ret;
B
Benny Halevy 已提交
2890 2891 2892
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
L
Linus Torvalds 已提交
2893 2894
}

2895 2896
static int decode_attr_mounted_on_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
{
A
Al Viro 已提交
2897
	__be32 *p;
2898
	int ret = 0;
2899 2900 2901 2902 2903

	*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
2904 2905 2906
		p = xdr_inline_decode(xdr, 8);
		if (unlikely(!p))
			goto out_overflow;
2907
		xdr_decode_hyper(p, fileid);
2908
		bitmap[1] &= ~FATTR4_WORD1_MOUNTED_ON_FILEID;
2909
		ret = NFS_ATTR_FATTR_FILEID;
2910
	}
2911
	dprintk("%s: fileid=%Lu\n", __func__, (unsigned long long)*fileid);
2912
	return ret;
B
Benny Halevy 已提交
2913 2914 2915
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
2916 2917
}

L
Linus Torvalds 已提交
2918 2919
static int decode_attr_files_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
{
A
Al Viro 已提交
2920
	__be32 *p;
L
Linus Torvalds 已提交
2921 2922 2923 2924 2925 2926
	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
2927 2928 2929
		p = xdr_inline_decode(xdr, 8);
		if (unlikely(!p))
			goto out_overflow;
2930
		xdr_decode_hyper(p, res);
L
Linus Torvalds 已提交
2931 2932
		bitmap[0] &= ~FATTR4_WORD0_FILES_AVAIL;
	}
2933
	dprintk("%s: files avail=%Lu\n", __func__, (unsigned long long)*res);
L
Linus Torvalds 已提交
2934
	return status;
B
Benny Halevy 已提交
2935 2936 2937
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
L
Linus Torvalds 已提交
2938 2939 2940 2941
}

static int decode_attr_files_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
{
A
Al Viro 已提交
2942
	__be32 *p;
L
Linus Torvalds 已提交
2943 2944 2945 2946 2947 2948
	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
2949 2950 2951
		p = xdr_inline_decode(xdr, 8);
		if (unlikely(!p))
			goto out_overflow;
2952
		xdr_decode_hyper(p, res);
L
Linus Torvalds 已提交
2953 2954
		bitmap[0] &= ~FATTR4_WORD0_FILES_FREE;
	}
2955
	dprintk("%s: files free=%Lu\n", __func__, (unsigned long long)*res);
L
Linus Torvalds 已提交
2956
	return status;
B
Benny Halevy 已提交
2957 2958 2959
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
L
Linus Torvalds 已提交
2960 2961 2962 2963
}

static int decode_attr_files_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
{
A
Al Viro 已提交
2964
	__be32 *p;
L
Linus Torvalds 已提交
2965 2966 2967 2968 2969 2970
	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
2971 2972 2973
		p = xdr_inline_decode(xdr, 8);
		if (unlikely(!p))
			goto out_overflow;
2974
		xdr_decode_hyper(p, res);
L
Linus Torvalds 已提交
2975 2976
		bitmap[0] &= ~FATTR4_WORD0_FILES_TOTAL;
	}
2977
	dprintk("%s: files total=%Lu\n", __func__, (unsigned long long)*res);
L
Linus Torvalds 已提交
2978
	return status;
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_pathname(struct xdr_stream *xdr, struct nfs4_pathname *path)
{
2986
	u32 n;
A
Al Viro 已提交
2987
	__be32 *p;
2988 2989
	int status = 0;

B
Benny Halevy 已提交
2990 2991 2992
	p = xdr_inline_decode(xdr, 4);
	if (unlikely(!p))
		goto out_overflow;
2993
	n = be32_to_cpup(p);
2994 2995
	if (n == 0)
		goto root_path;
2996 2997 2998 2999 3000 3001 3002 3003 3004 3005 3006 3007 3008 3009 3010 3011 3012 3013 3014 3015
	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;
3016 3017 3018 3019 3020 3021 3022
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;
3023 3024 3025 3026
out_eio:
	dprintk(" status %d", status);
	status = -EIO;
	goto out;
B
Benny Halevy 已提交
3027 3028 3029
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
3030 3031 3032
}

static int decode_attr_fs_locations(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs4_fs_locations *res)
3033 3034
{
	int n;
A
Al Viro 已提交
3035
	__be32 *p;
3036 3037 3038 3039 3040 3041 3042
	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;
3043
	dprintk("%s: fsroot ", __func__);
3044
	status = decode_pathname(xdr, &res->fs_path);
3045 3046
	if (unlikely(status != 0))
		goto out;
B
Benny Halevy 已提交
3047 3048 3049
	p = xdr_inline_decode(xdr, 4);
	if (unlikely(!p))
		goto out_overflow;
3050
	n = be32_to_cpup(p);
3051 3052 3053 3054
	if (n <= 0)
		goto out_eio;
	res->nlocations = 0;
	while (res->nlocations < n) {
3055
		u32 m;
3056
		struct nfs4_fs_location *loc = &res->locations[res->nlocations];
3057

B
Benny Halevy 已提交
3058 3059 3060
		p = xdr_inline_decode(xdr, 4);
		if (unlikely(!p))
			goto out_overflow;
3061
		m = be32_to_cpup(p);
3062 3063

		loc->nservers = 0;
3064
		dprintk("%s: servers ", __func__);
3065 3066 3067 3068 3069 3070 3071 3072 3073
		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 {
3074 3075 3076
				unsigned int i;
				dprintk("%s: using first %u of %u servers "
					"returned for location %u\n",
3077
						__func__,
3078 3079
						NFS4_FS_LOCATION_MAXSERVERS,
						m, res->nlocations);
3080
				for (i = loc->nservers; i < m; i++) {
T
Trond Myklebust 已提交
3081
					unsigned int len;
3082 3083 3084 3085 3086 3087 3088 3089
					char *data;
					status = decode_opaque_inline(xdr, &len, &data);
					if (unlikely(status != 0))
						goto out_eio;
				}
			}
		}
		status = decode_pathname(xdr, &loc->rootpath);
3090 3091
		if (unlikely(status != 0))
			goto out_eio;
3092
		if (res->nlocations < NFS4_FS_LOCATIONS_MAXENTRIES)
3093 3094
			res->nlocations++;
	}
3095 3096
	if (res->nlocations != 0)
		status = NFS_ATTR_FATTR_V4_REFERRAL;
3097
out:
3098
	dprintk("%s: fs_locations done, error = %d\n", __func__, status);
3099
	return status;
B
Benny Halevy 已提交
3100 3101
out_overflow:
	print_overflow_msg(__func__, xdr);
3102 3103 3104 3105 3106
out_eio:
	status = -EIO;
	goto out;
}

L
Linus Torvalds 已提交
3107 3108
static int decode_attr_maxfilesize(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
{
A
Al Viro 已提交
3109
	__be32 *p;
L
Linus Torvalds 已提交
3110 3111 3112 3113 3114 3115
	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
3116 3117 3118
		p = xdr_inline_decode(xdr, 8);
		if (unlikely(!p))
			goto out_overflow;
3119
		xdr_decode_hyper(p, res);
L
Linus Torvalds 已提交
3120 3121
		bitmap[0] &= ~FATTR4_WORD0_MAXFILESIZE;
	}
3122
	dprintk("%s: maxfilesize=%Lu\n", __func__, (unsigned long long)*res);
L
Linus Torvalds 已提交
3123
	return status;
B
Benny Halevy 已提交
3124 3125 3126
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
L
Linus Torvalds 已提交
3127 3128 3129 3130
}

static int decode_attr_maxlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxlink)
{
A
Al Viro 已提交
3131
	__be32 *p;
L
Linus Torvalds 已提交
3132 3133 3134 3135 3136 3137
	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
3138 3139 3140
		p = xdr_inline_decode(xdr, 4);
		if (unlikely(!p))
			goto out_overflow;
3141
		*maxlink = be32_to_cpup(p);
L
Linus Torvalds 已提交
3142 3143
		bitmap[0] &= ~FATTR4_WORD0_MAXLINK;
	}
3144
	dprintk("%s: maxlink=%u\n", __func__, *maxlink);
L
Linus Torvalds 已提交
3145
	return status;
B
Benny Halevy 已提交
3146 3147 3148
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
L
Linus Torvalds 已提交
3149 3150 3151 3152
}

static int decode_attr_maxname(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxname)
{
A
Al Viro 已提交
3153
	__be32 *p;
L
Linus Torvalds 已提交
3154 3155 3156 3157 3158 3159
	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
3160 3161 3162
		p = xdr_inline_decode(xdr, 4);
		if (unlikely(!p))
			goto out_overflow;
3163
		*maxname = be32_to_cpup(p);
L
Linus Torvalds 已提交
3164 3165
		bitmap[0] &= ~FATTR4_WORD0_MAXNAME;
	}
3166
	dprintk("%s: maxname=%u\n", __func__, *maxname);
L
Linus Torvalds 已提交
3167
	return status;
B
Benny Halevy 已提交
3168 3169 3170
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
L
Linus Torvalds 已提交
3171 3172 3173 3174
}

static int decode_attr_maxread(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
{
A
Al Viro 已提交
3175
	__be32 *p;
L
Linus Torvalds 已提交
3176 3177 3178 3179 3180 3181 3182
	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
3183 3184 3185
		p = xdr_inline_decode(xdr, 8);
		if (unlikely(!p))
			goto out_overflow;
3186
		xdr_decode_hyper(p, &maxread);
L
Linus Torvalds 已提交
3187 3188 3189 3190 3191
		if (maxread > 0x7FFFFFFF)
			maxread = 0x7FFFFFFF;
		*res = (uint32_t)maxread;
		bitmap[0] &= ~FATTR4_WORD0_MAXREAD;
	}
3192
	dprintk("%s: maxread=%lu\n", __func__, (unsigned long)*res);
L
Linus Torvalds 已提交
3193
	return status;
B
Benny Halevy 已提交
3194 3195 3196
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
L
Linus Torvalds 已提交
3197 3198 3199 3200
}

static int decode_attr_maxwrite(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
{
A
Al Viro 已提交
3201
	__be32 *p;
L
Linus Torvalds 已提交
3202 3203 3204 3205 3206 3207 3208
	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
3209 3210 3211
		p = xdr_inline_decode(xdr, 8);
		if (unlikely(!p))
			goto out_overflow;
3212
		xdr_decode_hyper(p, &maxwrite);
L
Linus Torvalds 已提交
3213 3214 3215 3216 3217
		if (maxwrite > 0x7FFFFFFF)
			maxwrite = 0x7FFFFFFF;
		*res = (uint32_t)maxwrite;
		bitmap[0] &= ~FATTR4_WORD0_MAXWRITE;
	}
3218
	dprintk("%s: maxwrite=%lu\n", __func__, (unsigned long)*res);
L
Linus Torvalds 已提交
3219
	return status;
B
Benny Halevy 已提交
3220 3221 3222
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
L
Linus Torvalds 已提交
3223 3224
}

3225
static int decode_attr_mode(struct xdr_stream *xdr, uint32_t *bitmap, umode_t *mode)
L
Linus Torvalds 已提交
3226
{
3227
	uint32_t tmp;
A
Al Viro 已提交
3228
	__be32 *p;
3229
	int ret = 0;
L
Linus Torvalds 已提交
3230 3231 3232 3233 3234

	*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
3235 3236 3237
		p = xdr_inline_decode(xdr, 4);
		if (unlikely(!p))
			goto out_overflow;
3238
		tmp = be32_to_cpup(p);
3239
		*mode = tmp & ~S_IFMT;
L
Linus Torvalds 已提交
3240
		bitmap[1] &= ~FATTR4_WORD1_MODE;
3241
		ret = NFS_ATTR_FATTR_MODE;
L
Linus Torvalds 已提交
3242
	}
3243
	dprintk("%s: file mode=0%o\n", __func__, (unsigned int)*mode);
3244
	return ret;
B
Benny Halevy 已提交
3245 3246 3247
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
L
Linus Torvalds 已提交
3248 3249 3250 3251
}

static int decode_attr_nlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *nlink)
{
A
Al Viro 已提交
3252
	__be32 *p;
3253
	int ret = 0;
L
Linus Torvalds 已提交
3254 3255 3256 3257 3258

	*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
3259 3260 3261
		p = xdr_inline_decode(xdr, 4);
		if (unlikely(!p))
			goto out_overflow;
3262
		*nlink = be32_to_cpup(p);
L
Linus Torvalds 已提交
3263
		bitmap[1] &= ~FATTR4_WORD1_NUMLINKS;
3264
		ret = NFS_ATTR_FATTR_NLINK;
L
Linus Torvalds 已提交
3265
	}
3266
	dprintk("%s: nlink=%u\n", __func__, (unsigned int)*nlink);
3267
	return ret;
B
Benny Halevy 已提交
3268 3269 3270
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
L
Linus Torvalds 已提交
3271 3272
}

3273 3274
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
3275
{
A
Al Viro 已提交
3276 3277
	uint32_t len;
	__be32 *p;
3278
	int ret = 0;
L
Linus Torvalds 已提交
3279 3280 3281 3282 3283

	*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
3284 3285 3286
		p = xdr_inline_decode(xdr, 4);
		if (unlikely(!p))
			goto out_overflow;
3287
		len = be32_to_cpup(p);
B
Benny Halevy 已提交
3288 3289 3290
		p = xdr_inline_decode(xdr, len);
		if (unlikely(!p))
			goto out_overflow;
3291 3292 3293
		if (!may_sleep) {
			/* do nothing */
		} else if (len < XDR_MAX_NETOBJ) {
3294 3295 3296
			if (nfs_map_name_to_uid(clp, (char *)p, len, uid) == 0)
				ret = NFS_ATTR_FATTR_OWNER;
			else
L
Linus Torvalds 已提交
3297
				dprintk("%s: nfs_map_name_to_uid failed!\n",
3298
						__func__);
L
Linus Torvalds 已提交
3299
		} else
3300
			dprintk("%s: name too long (%u)!\n",
3301
					__func__, len);
L
Linus Torvalds 已提交
3302 3303
		bitmap[1] &= ~FATTR4_WORD1_OWNER;
	}
3304
	dprintk("%s: uid=%d\n", __func__, (int)*uid);
3305
	return ret;
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_group(struct xdr_stream *xdr, uint32_t *bitmap,
		struct nfs_client *clp, uint32_t *gid, int may_sleep)
L
Linus Torvalds 已提交
3313
{
A
Al Viro 已提交
3314 3315
	uint32_t len;
	__be32 *p;
3316
	int ret = 0;
L
Linus Torvalds 已提交
3317 3318 3319 3320 3321

	*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
3322 3323 3324
		p = xdr_inline_decode(xdr, 4);
		if (unlikely(!p))
			goto out_overflow;
3325
		len = be32_to_cpup(p);
B
Benny Halevy 已提交
3326 3327 3328
		p = xdr_inline_decode(xdr, len);
		if (unlikely(!p))
			goto out_overflow;
3329 3330 3331
		if (!may_sleep) {
			/* do nothing */
		} else if (len < XDR_MAX_NETOBJ) {
3332 3333 3334
			if (nfs_map_group_to_gid(clp, (char *)p, len, gid) == 0)
				ret = NFS_ATTR_FATTR_GROUP;
			else
L
Linus Torvalds 已提交
3335
				dprintk("%s: nfs_map_group_to_gid failed!\n",
3336
						__func__);
L
Linus Torvalds 已提交
3337
		} else
3338
			dprintk("%s: name too long (%u)!\n",
3339
					__func__, len);
L
Linus Torvalds 已提交
3340 3341
		bitmap[1] &= ~FATTR4_WORD1_OWNER_GROUP;
	}
3342
	dprintk("%s: gid=%d\n", __func__, (int)*gid);
3343
	return ret;
B
Benny Halevy 已提交
3344 3345 3346
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
L
Linus Torvalds 已提交
3347 3348 3349 3350
}

static int decode_attr_rdev(struct xdr_stream *xdr, uint32_t *bitmap, dev_t *rdev)
{
A
Al Viro 已提交
3351 3352
	uint32_t major = 0, minor = 0;
	__be32 *p;
3353
	int ret = 0;
L
Linus Torvalds 已提交
3354 3355 3356 3357 3358 3359 3360

	*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
3361 3362 3363
		p = xdr_inline_decode(xdr, 8);
		if (unlikely(!p))
			goto out_overflow;
B
Benny Halevy 已提交
3364
		major = be32_to_cpup(p++);
3365
		minor = be32_to_cpup(p);
L
Linus Torvalds 已提交
3366 3367 3368 3369
		tmp = MKDEV(major, minor);
		if (MAJOR(tmp) == major && MINOR(tmp) == minor)
			*rdev = tmp;
		bitmap[1] &= ~ FATTR4_WORD1_RAWDEV;
3370
		ret = NFS_ATTR_FATTR_RDEV;
L
Linus Torvalds 已提交
3371
	}
3372
	dprintk("%s: rdev=(0x%x:0x%x)\n", __func__, major, minor);
3373
	return ret;
B
Benny Halevy 已提交
3374 3375 3376
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
L
Linus Torvalds 已提交
3377 3378 3379 3380
}

static int decode_attr_space_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
{
A
Al Viro 已提交
3381
	__be32 *p;
L
Linus Torvalds 已提交
3382 3383 3384 3385 3386 3387
	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
3388 3389 3390
		p = xdr_inline_decode(xdr, 8);
		if (unlikely(!p))
			goto out_overflow;
3391
		xdr_decode_hyper(p, res);
L
Linus Torvalds 已提交
3392 3393
		bitmap[1] &= ~FATTR4_WORD1_SPACE_AVAIL;
	}
3394
	dprintk("%s: space avail=%Lu\n", __func__, (unsigned long long)*res);
L
Linus Torvalds 已提交
3395
	return status;
B
Benny Halevy 已提交
3396 3397 3398
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
L
Linus Torvalds 已提交
3399 3400 3401 3402
}

static int decode_attr_space_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
{
A
Al Viro 已提交
3403
	__be32 *p;
L
Linus Torvalds 已提交
3404 3405 3406 3407 3408 3409
	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
3410 3411 3412
		p = xdr_inline_decode(xdr, 8);
		if (unlikely(!p))
			goto out_overflow;
3413
		xdr_decode_hyper(p, res);
L
Linus Torvalds 已提交
3414 3415
		bitmap[1] &= ~FATTR4_WORD1_SPACE_FREE;
	}
3416
	dprintk("%s: space free=%Lu\n", __func__, (unsigned long long)*res);
L
Linus Torvalds 已提交
3417
	return status;
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_space_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
{
A
Al Viro 已提交
3425
	__be32 *p;
L
Linus Torvalds 已提交
3426 3427 3428 3429 3430 3431
	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
3432 3433 3434
		p = xdr_inline_decode(xdr, 8);
		if (unlikely(!p))
			goto out_overflow;
3435
		xdr_decode_hyper(p, res);
L
Linus Torvalds 已提交
3436 3437
		bitmap[1] &= ~FATTR4_WORD1_SPACE_TOTAL;
	}
3438
	dprintk("%s: space total=%Lu\n", __func__, (unsigned long long)*res);
L
Linus Torvalds 已提交
3439
	return status;
B
Benny Halevy 已提交
3440 3441 3442
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
L
Linus Torvalds 已提交
3443 3444 3445 3446
}

static int decode_attr_space_used(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *used)
{
A
Al Viro 已提交
3447
	__be32 *p;
3448
	int ret = 0;
L
Linus Torvalds 已提交
3449 3450 3451 3452 3453

	*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
3454 3455 3456
		p = xdr_inline_decode(xdr, 8);
		if (unlikely(!p))
			goto out_overflow;
3457
		xdr_decode_hyper(p, used);
L
Linus Torvalds 已提交
3458
		bitmap[1] &= ~FATTR4_WORD1_SPACE_USED;
3459
		ret = NFS_ATTR_FATTR_SPACE_USED;
L
Linus Torvalds 已提交
3460
	}
3461
	dprintk("%s: space used=%Lu\n", __func__,
L
Linus Torvalds 已提交
3462
			(unsigned long long)*used);
3463
	return ret;
B
Benny Halevy 已提交
3464 3465 3466
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
L
Linus Torvalds 已提交
3467 3468 3469 3470
}

static int decode_attr_time(struct xdr_stream *xdr, struct timespec *time)
{
A
Al Viro 已提交
3471
	__be32 *p;
L
Linus Torvalds 已提交
3472 3473 3474
	uint64_t sec;
	uint32_t nsec;

B
Benny Halevy 已提交
3475 3476 3477
	p = xdr_inline_decode(xdr, 12);
	if (unlikely(!p))
		goto out_overflow;
B
Benny Halevy 已提交
3478
	p = xdr_decode_hyper(p, &sec);
3479
	nsec = be32_to_cpup(p);
L
Linus Torvalds 已提交
3480 3481 3482
	time->tv_sec = (time_t)sec;
	time->tv_nsec = (long)nsec;
	return 0;
B
Benny Halevy 已提交
3483 3484 3485
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
L
Linus Torvalds 已提交
3486 3487 3488 3489 3490 3491 3492 3493 3494 3495 3496 3497
}

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);
3498 3499
		if (status == 0)
			status = NFS_ATTR_FATTR_ATIME;
L
Linus Torvalds 已提交
3500 3501
		bitmap[1] &= ~FATTR4_WORD1_TIME_ACCESS;
	}
3502
	dprintk("%s: atime=%ld\n", __func__, (long)time->tv_sec);
L
Linus Torvalds 已提交
3503 3504 3505 3506 3507 3508 3509 3510 3511 3512 3513 3514 3515
	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);
3516 3517
		if (status == 0)
			status = NFS_ATTR_FATTR_CTIME;
L
Linus Torvalds 已提交
3518 3519
		bitmap[1] &= ~FATTR4_WORD1_TIME_METADATA;
	}
3520
	dprintk("%s: ctime=%ld\n", __func__, (long)time->tv_sec);
L
Linus Torvalds 已提交
3521 3522 3523 3524 3525 3526 3527 3528 3529 3530 3531 3532 3533
	return status;
}

static int decode_attr_time_modify(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
{
	int status = 0;

	time->tv_sec = 0;
	time->tv_nsec = 0;
	if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_MODIFY - 1U)))
		return -EIO;
	if (likely(bitmap[1] & FATTR4_WORD1_TIME_MODIFY)) {
		status = decode_attr_time(xdr, time);
3534 3535
		if (status == 0)
			status = NFS_ATTR_FATTR_MTIME;
L
Linus Torvalds 已提交
3536 3537
		bitmap[1] &= ~FATTR4_WORD1_TIME_MODIFY;
	}
3538
	dprintk("%s: mtime=%ld\n", __func__, (long)time->tv_sec);
L
Linus Torvalds 已提交
3539 3540 3541
	return status;
}

A
Al Viro 已提交
3542
static int verify_attr_len(struct xdr_stream *xdr, __be32 *savep, uint32_t attrlen)
L
Linus Torvalds 已提交
3543 3544 3545 3546 3547
{
	unsigned int attrwords = XDR_QUADLEN(attrlen);
	unsigned int nwords = xdr->p - savep;

	if (unlikely(attrwords != nwords)) {
3548 3549
		dprintk("%s: server returned incorrect attribute length: "
			"%u %c %u\n",
3550
				__func__,
L
Linus Torvalds 已提交
3551 3552 3553 3554 3555 3556 3557 3558 3559 3560
				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
3561
	__be32 *p;
L
Linus Torvalds 已提交
3562

B
Benny Halevy 已提交
3563 3564 3565
	p = xdr_inline_decode(xdr, 20);
	if (unlikely(!p))
		goto out_overflow;
B
Benny Halevy 已提交
3566
	cinfo->atomic = be32_to_cpup(p++);
B
Benny Halevy 已提交
3567
	p = xdr_decode_hyper(p, &cinfo->before);
3568
	xdr_decode_hyper(p, &cinfo->after);
L
Linus Torvalds 已提交
3569
	return 0;
B
Benny Halevy 已提交
3570 3571 3572
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
L
Linus Torvalds 已提交
3573 3574 3575 3576
}

static int decode_access(struct xdr_stream *xdr, struct nfs4_accessres *access)
{
A
Al Viro 已提交
3577
	__be32 *p;
L
Linus Torvalds 已提交
3578 3579 3580 3581 3582 3583
	uint32_t supp, acc;
	int status;

	status = decode_op_hdr(xdr, OP_ACCESS);
	if (status)
		return status;
B
Benny Halevy 已提交
3584 3585 3586
	p = xdr_inline_decode(xdr, 8);
	if (unlikely(!p))
		goto out_overflow;
B
Benny Halevy 已提交
3587
	supp = be32_to_cpup(p++);
3588
	acc = be32_to_cpup(p);
L
Linus Torvalds 已提交
3589 3590 3591
	access->supported = supp;
	access->access = acc;
	return 0;
B
Benny Halevy 已提交
3592 3593 3594
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
L
Linus Torvalds 已提交
3595 3596
}

3597
static int decode_opaque_fixed(struct xdr_stream *xdr, void *buf, size_t len)
L
Linus Torvalds 已提交
3598
{
A
Al Viro 已提交
3599
	__be32 *p;
3600 3601 3602 3603 3604 3605 3606 3607 3608 3609 3610 3611 3612 3613 3614 3615 3616

	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
3617 3618 3619
	int status;

	status = decode_op_hdr(xdr, OP_CLOSE);
3620 3621
	if (status != -EIO)
		nfs_increment_open_seqid(status, res->seqid);
3622 3623 3624
	if (!status)
		status = decode_stateid(xdr, &res->stateid);
	return status;
L
Linus Torvalds 已提交
3625 3626
}

3627 3628 3629
static int decode_verifier(struct xdr_stream *xdr, void *verifier)
{
	return decode_opaque_fixed(xdr, verifier, 8);
L
Linus Torvalds 已提交
3630 3631 3632 3633 3634 3635 3636
}

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

	status = decode_op_hdr(xdr, OP_COMMIT);
3637 3638 3639
	if (!status)
		status = decode_verifier(xdr, res->verf->verifier);
	return status;
L
Linus Torvalds 已提交
3640 3641 3642 3643
}

static int decode_create(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
{
A
Al Viro 已提交
3644
	__be32 *p;
L
Linus Torvalds 已提交
3645 3646 3647 3648 3649 3650 3651 3652
	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
3653 3654 3655
	p = xdr_inline_decode(xdr, 4);
	if (unlikely(!p))
		goto out_overflow;
3656
	bmlen = be32_to_cpup(p);
B
Benny Halevy 已提交
3657 3658 3659 3660 3661 3662
	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
3663 3664 3665 3666
}

static int decode_server_caps(struct xdr_stream *xdr, struct nfs4_server_caps_res *res)
{
A
Al Viro 已提交
3667
	__be32 *savep;
3668
	uint32_t attrlen, bitmap[2] = {0};
L
Linus Torvalds 已提交
3669 3670 3671 3672 3673 3674 3675 3676 3677 3678 3679 3680 3681 3682 3683 3684 3685 3686
	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:
3687
	dprintk("%s: xdr returned %d!\n", __func__, -status);
L
Linus Torvalds 已提交
3688 3689
	return status;
}
3690

L
Linus Torvalds 已提交
3691 3692
static int decode_statfs(struct xdr_stream *xdr, struct nfs_fsstat *fsstat)
{
A
Al Viro 已提交
3693
	__be32 *savep;
3694
	uint32_t attrlen, bitmap[2] = {0};
L
Linus Torvalds 已提交
3695
	int status;
3696

L
Linus Torvalds 已提交
3697 3698 3699 3700 3701 3702 3703 3704 3705 3706 3707 3708 3709 3710 3711 3712 3713 3714 3715 3716 3717 3718
	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:
3719
	dprintk("%s: xdr returned %d!\n", __func__, -status);
L
Linus Torvalds 已提交
3720 3721 3722 3723 3724
	return status;
}

static int decode_pathconf(struct xdr_stream *xdr, struct nfs_pathconf *pathconf)
{
A
Al Viro 已提交
3725
	__be32 *savep;
3726
	uint32_t attrlen, bitmap[2] = {0};
L
Linus Torvalds 已提交
3727
	int status;
3728

L
Linus Torvalds 已提交
3729 3730 3731 3732 3733 3734 3735 3736 3737 3738 3739 3740 3741 3742
	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:
3743
	dprintk("%s: xdr returned %d!\n", __func__, -status);
L
Linus Torvalds 已提交
3744 3745 3746
	return status;
}

3747 3748
static int decode_getfattr(struct xdr_stream *xdr, struct nfs_fattr *fattr,
		const struct nfs_server *server, int may_sleep)
L
Linus Torvalds 已提交
3749
{
A
Al Viro 已提交
3750
	__be32 *savep;
L
Linus Torvalds 已提交
3751 3752 3753
	uint32_t attrlen,
		 bitmap[2] = {0},
		 type;
3754 3755
	int status;
	umode_t fmode = 0;
3756
	uint64_t fileid;
L
Linus Torvalds 已提交
3757

3758 3759
	status = decode_op_hdr(xdr, OP_GETATTR);
	if (status < 0)
L
Linus Torvalds 已提交
3760
		goto xdr_error;
3761 3762 3763

	status = decode_attr_bitmap(xdr, bitmap);
	if (status < 0)
L
Linus Torvalds 已提交
3764 3765
		goto xdr_error;

3766 3767
	status = decode_attr_length(xdr, &attrlen, &savep);
	if (status < 0)
L
Linus Torvalds 已提交
3768 3769 3770
		goto xdr_error;


3771 3772
	status = decode_attr_type(xdr, bitmap, &type);
	if (status < 0)
L
Linus Torvalds 已提交
3773
		goto xdr_error;
3774 3775 3776 3777 3778
	fattr->mode = 0;
	if (status != 0) {
		fattr->mode |= nfs_type2fmt[type];
		fattr->valid |= status;
	}
L
Linus Torvalds 已提交
3779

3780 3781
	status = decode_attr_change(xdr, bitmap, &fattr->change_attr);
	if (status < 0)
L
Linus Torvalds 已提交
3782
		goto xdr_error;
3783
	fattr->valid |= status;
3784 3785 3786

	status = decode_attr_size(xdr, bitmap, &fattr->size);
	if (status < 0)
L
Linus Torvalds 已提交
3787
		goto xdr_error;
3788
	fattr->valid |= status;
3789 3790 3791

	status = decode_attr_fsid(xdr, bitmap, &fattr->fsid);
	if (status < 0)
L
Linus Torvalds 已提交
3792
		goto xdr_error;
3793
	fattr->valid |= status;
3794 3795 3796

	status = decode_attr_fileid(xdr, bitmap, &fattr->fileid);
	if (status < 0)
L
Linus Torvalds 已提交
3797
		goto xdr_error;
3798
	fattr->valid |= status;
3799 3800

	status = decode_attr_fs_locations(xdr, bitmap, container_of(fattr,
3801
						struct nfs4_fs_locations,
3802 3803
						fattr));
	if (status < 0)
3804
		goto xdr_error;
3805
	fattr->valid |= status;
3806 3807 3808

	status = decode_attr_mode(xdr, bitmap, &fmode);
	if (status < 0)
L
Linus Torvalds 已提交
3809
		goto xdr_error;
3810 3811 3812 3813
	if (status != 0) {
		fattr->mode |= fmode;
		fattr->valid |= status;
	}
3814 3815 3816

	status = decode_attr_nlink(xdr, bitmap, &fattr->nlink);
	if (status < 0)
L
Linus Torvalds 已提交
3817
		goto xdr_error;
3818
	fattr->valid |= status;
3819

3820 3821
	status = decode_attr_owner(xdr, bitmap, server->nfs_client,
			&fattr->uid, may_sleep);
3822
	if (status < 0)
L
Linus Torvalds 已提交
3823
		goto xdr_error;
3824
	fattr->valid |= status;
3825

3826 3827
	status = decode_attr_group(xdr, bitmap, server->nfs_client,
			&fattr->gid, may_sleep);
3828
	if (status < 0)
L
Linus Torvalds 已提交
3829
		goto xdr_error;
3830
	fattr->valid |= status;
3831 3832 3833

	status = decode_attr_rdev(xdr, bitmap, &fattr->rdev);
	if (status < 0)
L
Linus Torvalds 已提交
3834
		goto xdr_error;
3835
	fattr->valid |= status;
3836 3837 3838

	status = decode_attr_space_used(xdr, bitmap, &fattr->du.nfs3.used);
	if (status < 0)
L
Linus Torvalds 已提交
3839
		goto xdr_error;
3840
	fattr->valid |= status;
3841 3842 3843

	status = decode_attr_time_access(xdr, bitmap, &fattr->atime);
	if (status < 0)
L
Linus Torvalds 已提交
3844
		goto xdr_error;
3845
	fattr->valid |= status;
3846 3847 3848

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

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

	status = decode_attr_mounted_on_fileid(xdr, bitmap, &fileid);
	if (status < 0)
3859
		goto xdr_error;
3860
	if (status != 0 && !(fattr->valid & status)) {
3861
		fattr->fileid = fileid;
3862 3863
		fattr->valid |= status;
	}
3864 3865

	status = verify_attr_len(xdr, savep, attrlen);
L
Linus Torvalds 已提交
3866
xdr_error:
3867
	dprintk("%s: xdr returned %d\n", __func__, -status);
L
Linus Torvalds 已提交
3868 3869 3870 3871 3872 3873
	return status;
}


static int decode_fsinfo(struct xdr_stream *xdr, struct nfs_fsinfo *fsinfo)
{
A
Al Viro 已提交
3874
	__be32 *savep;
L
Linus Torvalds 已提交
3875 3876 3877 3878 3879 3880 3881 3882 3883 3884 3885 3886 3887 3888 3889 3890 3891 3892 3893 3894 3895 3896 3897 3898 3899
	uint32_t attrlen, bitmap[2];
	int status;

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

	fsinfo->rtmult = fsinfo->wtmult = 512;	/* ??? */

	if ((status = decode_attr_lease_time(xdr, bitmap, &fsinfo->lease_time)) != 0)
		goto xdr_error;
	if ((status = decode_attr_maxfilesize(xdr, bitmap, &fsinfo->maxfilesize)) != 0)
		goto xdr_error;
	if ((status = decode_attr_maxread(xdr, bitmap, &fsinfo->rtmax)) != 0)
		goto xdr_error;
	fsinfo->rtpref = fsinfo->dtpref = fsinfo->rtmax;
	if ((status = decode_attr_maxwrite(xdr, bitmap, &fsinfo->wtmax)) != 0)
		goto xdr_error;
	fsinfo->wtpref = fsinfo->wtmax;

	status = verify_attr_len(xdr, savep, attrlen);
xdr_error:
3900
	dprintk("%s: xdr returned %d!\n", __func__, -status);
L
Linus Torvalds 已提交
3901 3902 3903 3904 3905
	return status;
}

static int decode_getfh(struct xdr_stream *xdr, struct nfs_fh *fh)
{
A
Al Viro 已提交
3906
	__be32 *p;
L
Linus Torvalds 已提交
3907 3908 3909
	uint32_t len;
	int status;

3910 3911 3912
	/* Zero handle first to allow comparisons */
	memset(fh, 0, sizeof(*fh));

L
Linus Torvalds 已提交
3913 3914 3915 3916
	status = decode_op_hdr(xdr, OP_GETFH);
	if (status)
		return status;

B
Benny Halevy 已提交
3917 3918 3919
	p = xdr_inline_decode(xdr, 4);
	if (unlikely(!p))
		goto out_overflow;
3920
	len = be32_to_cpup(p);
L
Linus Torvalds 已提交
3921 3922 3923
	if (len > NFS4_FHSIZE)
		return -EIO;
	fh->size = len;
B
Benny Halevy 已提交
3924 3925 3926
	p = xdr_inline_decode(xdr, len);
	if (unlikely(!p))
		goto out_overflow;
B
Benny Halevy 已提交
3927
	memcpy(fh->data, p, len);
L
Linus Torvalds 已提交
3928
	return 0;
B
Benny Halevy 已提交
3929 3930 3931
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
L
Linus Torvalds 已提交
3932 3933 3934 3935 3936
}

static int decode_link(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
{
	int status;
3937

L
Linus Torvalds 已提交
3938 3939 3940 3941 3942 3943 3944 3945 3946
	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
3947
static int decode_lock_denied (struct xdr_stream *xdr, struct file_lock *fl)
L
Linus Torvalds 已提交
3948
{
T
Trond Myklebust 已提交
3949
	uint64_t offset, length, clientid;
A
Al Viro 已提交
3950
	__be32 *p;
T
Trond Myklebust 已提交
3951
	uint32_t namelen, type;
L
Linus Torvalds 已提交
3952

B
Benny Halevy 已提交
3953 3954 3955
	p = xdr_inline_decode(xdr, 32);
	if (unlikely(!p))
		goto out_overflow;
B
Benny Halevy 已提交
3956 3957
	p = xdr_decode_hyper(p, &offset);
	p = xdr_decode_hyper(p, &length);
B
Benny Halevy 已提交
3958
	type = be32_to_cpup(p++);
T
Trond Myklebust 已提交
3959 3960 3961 3962 3963 3964 3965 3966 3967 3968
	if (fl != NULL) {
		fl->fl_start = (loff_t)offset;
		fl->fl_end = fl->fl_start + (loff_t)length - 1;
		if (length == ~(uint64_t)0)
			fl->fl_end = OFFSET_MAX;
		fl->fl_type = F_WRLCK;
		if (type & 1)
			fl->fl_type = F_RDLCK;
		fl->fl_pid = 0;
	}
B
Benny Halevy 已提交
3969
	p = xdr_decode_hyper(p, &clientid);
3970
	namelen = be32_to_cpup(p);
B
Benny Halevy 已提交
3971 3972 3973 3974 3975 3976
	p = xdr_inline_decode(xdr, namelen);
	if (likely(p))
		return -NFS4ERR_DENIED;
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
L
Linus Torvalds 已提交
3977 3978
}

T
Trond Myklebust 已提交
3979
static int decode_lock(struct xdr_stream *xdr, struct nfs_lock_res *res)
L
Linus Torvalds 已提交
3980 3981 3982 3983
{
	int status;

	status = decode_op_hdr(xdr, OP_LOCK);
3984 3985
	if (status == -EIO)
		goto out;
L
Linus Torvalds 已提交
3986
	if (status == 0) {
3987 3988 3989
		status = decode_stateid(xdr, &res->stateid);
		if (unlikely(status))
			goto out;
L
Linus Torvalds 已提交
3990
	} else if (status == -NFS4ERR_DENIED)
3991 3992 3993 3994 3995
		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
3996 3997 3998
	return status;
}

T
Trond Myklebust 已提交
3999
static int decode_lockt(struct xdr_stream *xdr, struct nfs_lockt_res *res)
L
Linus Torvalds 已提交
4000 4001 4002 4003
{
	int status;
	status = decode_op_hdr(xdr, OP_LOCKT);
	if (status == -NFS4ERR_DENIED)
T
Trond Myklebust 已提交
4004
		return decode_lock_denied(xdr, res->denied);
L
Linus Torvalds 已提交
4005 4006 4007
	return status;
}

T
Trond Myklebust 已提交
4008
static int decode_locku(struct xdr_stream *xdr, struct nfs_locku_res *res)
L
Linus Torvalds 已提交
4009 4010 4011 4012
{
	int status;

	status = decode_op_hdr(xdr, OP_LOCKU);
4013 4014
	if (status != -EIO)
		nfs_increment_lock_seqid(status, res->seqid);
4015 4016
	if (status == 0)
		status = decode_stateid(xdr, &res->stateid);
L
Linus Torvalds 已提交
4017 4018 4019
	return status;
}

4020 4021 4022 4023 4024
static int decode_release_lockowner(struct xdr_stream *xdr)
{
	return decode_op_hdr(xdr, OP_RELEASE_LOCKOWNER);
}

L
Linus Torvalds 已提交
4025 4026 4027 4028 4029 4030 4031 4032
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
4033
	__be32 *p;
L
Linus Torvalds 已提交
4034 4035
	uint32_t limit_type, nblocks, blocksize;

B
Benny Halevy 已提交
4036 4037 4038
	p = xdr_inline_decode(xdr, 12);
	if (unlikely(!p))
		goto out_overflow;
B
Benny Halevy 已提交
4039
	limit_type = be32_to_cpup(p++);
L
Linus Torvalds 已提交
4040
	switch (limit_type) {
A
Andy Adamson 已提交
4041
	case 1:
4042
		xdr_decode_hyper(p, maxsize);
A
Andy Adamson 已提交
4043 4044
		break;
	case 2:
B
Benny Halevy 已提交
4045
		nblocks = be32_to_cpup(p++);
4046
		blocksize = be32_to_cpup(p);
A
Andy Adamson 已提交
4047
		*maxsize = (uint64_t)nblocks * (uint64_t)blocksize;
L
Linus Torvalds 已提交
4048 4049
	}
	return 0;
B
Benny Halevy 已提交
4050 4051 4052
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
L
Linus Torvalds 已提交
4053 4054 4055 4056
}

static int decode_delegation(struct xdr_stream *xdr, struct nfs_openres *res)
{
A
Andy Adamson 已提交
4057 4058
	__be32 *p;
	uint32_t delegation_type;
4059
	int status;
L
Linus Torvalds 已提交
4060

B
Benny Halevy 已提交
4061 4062 4063
	p = xdr_inline_decode(xdr, 4);
	if (unlikely(!p))
		goto out_overflow;
4064
	delegation_type = be32_to_cpup(p);
L
Linus Torvalds 已提交
4065 4066 4067 4068
	if (delegation_type == NFS4_OPEN_DELEGATE_NONE) {
		res->delegation_type = 0;
		return 0;
	}
4069 4070 4071
	status = decode_stateid(xdr, &res->delegation);
	if (unlikely(status))
		return status;
B
Benny Halevy 已提交
4072 4073 4074
	p = xdr_inline_decode(xdr, 4);
	if (unlikely(!p))
		goto out_overflow;
4075
	res->do_recall = be32_to_cpup(p);
A
Andy Adamson 已提交
4076

L
Linus Torvalds 已提交
4077
	switch (delegation_type) {
A
Andy Adamson 已提交
4078 4079 4080 4081 4082 4083
	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
4084 4085
				return -EIO;
	}
4086
	return decode_ace(xdr, NULL, res->server->nfs_client);
B
Benny Halevy 已提交
4087 4088 4089
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
L
Linus Torvalds 已提交
4090 4091 4092 4093
}

static int decode_open(struct xdr_stream *xdr, struct nfs_openres *res)
{
A
Andy Adamson 已提交
4094
	__be32 *p;
4095
	uint32_t savewords, bmlen, i;
A
Andy Adamson 已提交
4096
	int status;
L
Linus Torvalds 已提交
4097

A
Andy Adamson 已提交
4098
	status = decode_op_hdr(xdr, OP_OPEN);
4099 4100
	if (status != -EIO)
		nfs_increment_open_seqid(status, res->seqid);
4101 4102 4103
	if (!status)
		status = decode_stateid(xdr, &res->stateid);
	if (unlikely(status))
A
Andy Adamson 已提交
4104
		return status;
L
Linus Torvalds 已提交
4105

A
Andy Adamson 已提交
4106
	decode_change_info(xdr, &res->cinfo);
L
Linus Torvalds 已提交
4107

B
Benny Halevy 已提交
4108 4109 4110
	p = xdr_inline_decode(xdr, 8);
	if (unlikely(!p))
		goto out_overflow;
B
Benny Halevy 已提交
4111
	res->rflags = be32_to_cpup(p++);
4112
	bmlen = be32_to_cpup(p);
A
Andy Adamson 已提交
4113 4114
	if (bmlen > 10)
		goto xdr_error;
L
Linus Torvalds 已提交
4115

B
Benny Halevy 已提交
4116 4117 4118
	p = xdr_inline_decode(xdr, bmlen << 2);
	if (unlikely(!p))
		goto out_overflow;
4119 4120
	savewords = min_t(uint32_t, bmlen, NFS4_BITMAP_SIZE);
	for (i = 0; i < savewords; ++i)
B
Benny Halevy 已提交
4121
		res->attrset[i] = be32_to_cpup(p++);
4122 4123 4124
	for (; i < NFS4_BITMAP_SIZE; i++)
		res->attrset[i] = 0;

L
Linus Torvalds 已提交
4125 4126
	return decode_delegation(xdr, res);
xdr_error:
4127
	dprintk("%s: Bitmap too large! Length = %u\n", __func__, bmlen);
L
Linus Torvalds 已提交
4128
	return -EIO;
B
Benny Halevy 已提交
4129 4130 4131
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
L
Linus Torvalds 已提交
4132 4133 4134 4135 4136 4137
}

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

A
Andy Adamson 已提交
4138
	status = decode_op_hdr(xdr, OP_OPEN_CONFIRM);
4139 4140
	if (status != -EIO)
		nfs_increment_open_seqid(status, res->seqid);
4141 4142 4143
	if (!status)
		status = decode_stateid(xdr, &res->stateid);
	return status;
L
Linus Torvalds 已提交
4144 4145 4146 4147 4148 4149 4150
}

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

	status = decode_op_hdr(xdr, OP_OPEN_DOWNGRADE);
4151 4152
	if (status != -EIO)
		nfs_increment_open_seqid(status, res->seqid);
4153 4154 4155
	if (!status)
		status = decode_stateid(xdr, &res->stateid);
	return status;
L
Linus Torvalds 已提交
4156 4157 4158 4159 4160 4161 4162 4163 4164 4165 4166 4167 4168 4169 4170
}

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
4171
	__be32 *p;
L
Linus Torvalds 已提交
4172 4173 4174 4175 4176 4177
	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
4178 4179 4180
	p = xdr_inline_decode(xdr, 8);
	if (unlikely(!p))
		goto out_overflow;
B
Benny Halevy 已提交
4181
	eof = be32_to_cpup(p++);
4182
	count = be32_to_cpup(p);
L
Linus Torvalds 已提交
4183 4184 4185
	hdrlen = (u8 *) p - (u8 *) iov->iov_base;
	recvd = req->rq_rcv_buf.len - hdrlen;
	if (count > recvd) {
4186
		dprintk("NFS: server cheating in read reply: "
L
Linus Torvalds 已提交
4187 4188 4189 4190 4191 4192 4193 4194
				"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
4195 4196 4197
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
L
Linus Torvalds 已提交
4198 4199 4200 4201 4202 4203 4204
}

static int decode_readdir(struct xdr_stream *xdr, struct rpc_rqst *req, struct nfs4_readdir_res *readdir)
{
	struct xdr_buf	*rcvbuf = &req->rq_rcv_buf;
	struct page	*page = *rcvbuf->pages;
	struct kvec	*iov = rcvbuf->head;
4205 4206
	size_t		hdrlen;
	u32		recvd, pglen = rcvbuf->page_len;
A
Al Viro 已提交
4207
	__be32		*end, *entry, *p, *kaddr;
4208
	unsigned int	nr = 0;
4209
	int		status;
L
Linus Torvalds 已提交
4210 4211

	status = decode_op_hdr(xdr, OP_READDIR);
4212 4213 4214
	if (!status)
		status = decode_verifier(xdr, readdir->verifier.data);
	if (unlikely(status))
L
Linus Torvalds 已提交
4215
		return status;
4216 4217
	dprintk("%s: verifier = %08x:%08x\n",
			__func__,
4218 4219 4220
			((u32 *)readdir->verifier.data)[0],
			((u32 *)readdir->verifier.data)[1]);

L
Linus Torvalds 已提交
4221

4222
	hdrlen = (char *) xdr->p - (char *) iov->iov_base;
L
Linus Torvalds 已提交
4223 4224 4225 4226 4227 4228
	recvd = rcvbuf->len - hdrlen;
	if (pglen > recvd)
		pglen = recvd;
	xdr_read_pages(xdr, pglen);

	BUG_ON(pglen + readdir->pgbase > PAGE_CACHE_SIZE);
A
Al Viro 已提交
4229
	kaddr = p = kmap_atomic(page, KM_USER0);
4230
	end = p + ((pglen + readdir->pgbase) >> 2);
L
Linus Torvalds 已提交
4231
	entry = p;
4232 4233 4234 4235 4236 4237

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

	for (; *p++; nr++) {
4238
		u32 len, attrlen, xlen;
4239
		if (end - p < 3)
L
Linus Torvalds 已提交
4240
			goto short_pkt;
4241
		dprintk("cookie = %Lu, ", *((unsigned long long *)p));
L
Linus Torvalds 已提交
4242 4243 4244
		p += 2;			/* cookie */
		len = ntohl(*p++);	/* filename length */
		if (len > NFS4_MAXNAMLEN) {
4245 4246
			dprintk("NFS: giant filename in readdir (len 0x%x)\n",
					len);
L
Linus Torvalds 已提交
4247 4248
			goto err_unmap;
		}
4249 4250
		xlen = XDR_QUADLEN(len);
		if (end - p < xlen + 1)
L
Linus Torvalds 已提交
4251
			goto short_pkt;
4252 4253
		dprintk("filename = %*s\n", len, (char *)p);
		p += xlen;
L
Linus Torvalds 已提交
4254
		len = ntohl(*p++);	/* bitmap length */
4255
		if (end - p < len + 1)
L
Linus Torvalds 已提交
4256
			goto short_pkt;
4257
		p += len;
L
Linus Torvalds 已提交
4258
		attrlen = XDR_QUADLEN(ntohl(*p++));
4259
		if (end - p < attrlen + 2)
L
Linus Torvalds 已提交
4260
			goto short_pkt;
4261
		p += attrlen;		/* attributes */
L
Linus Torvalds 已提交
4262 4263
		entry = p;
	}
4264 4265 4266 4267 4268 4269 4270 4271 4272
	/*
	 * Apparently some server sends responses that are a valid size, but
	 * contain no entries, and have value_follows==0 and EOF==0. For
	 * those, just set the EOF marker.
	 */
	if (!nr && entry[1] == 0) {
		dprintk("NFS: readdir reply truncated!\n");
		entry[1] = 1;
	}
4273
out:
L
Linus Torvalds 已提交
4274 4275 4276
	kunmap_atomic(kaddr, KM_USER0);
	return 0;
short_pkt:
4277 4278 4279 4280 4281 4282 4283 4284 4285
	/*
	 * When we get a short packet there are 2 possibilities. We can
	 * return an error, or fix up the response to look like a valid
	 * response and return what we have so far. If there are no
	 * entries and the packet was short, then return -EIO. If there
	 * are valid entries in the response, return them and pretend that
	 * the call was successful, but incomplete. The caller can retry the
	 * readdir starting at the last cookie.
	 */
4286
	dprintk("%s: short packet at entry %d\n", __func__, nr);
L
Linus Torvalds 已提交
4287
	entry[0] = entry[1] = 0;
4288 4289
	if (nr)
		goto out;
L
Linus Torvalds 已提交
4290 4291 4292 4293 4294 4295 4296 4297 4298
err_unmap:
	kunmap_atomic(kaddr, KM_USER0);
	return -errno_NFSERR_IO;
}

static int decode_readlink(struct xdr_stream *xdr, struct rpc_rqst *req)
{
	struct xdr_buf *rcvbuf = &req->rq_rcv_buf;
	struct kvec *iov = rcvbuf->head;
4299 4300
	size_t hdrlen;
	u32 len, recvd;
A
Al Viro 已提交
4301
	__be32 *p;
L
Linus Torvalds 已提交
4302 4303 4304 4305 4306 4307 4308 4309
	char *kaddr;
	int status;

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

	/* Convert length of symlink */
B
Benny Halevy 已提交
4310 4311 4312
	p = xdr_inline_decode(xdr, 4);
	if (unlikely(!p))
		goto out_overflow;
4313
	len = be32_to_cpup(p);
L
Linus Torvalds 已提交
4314
	if (len >= rcvbuf->page_len || len <= 0) {
4315
		dprintk("nfs: server returned giant symlink!\n");
L
Linus Torvalds 已提交
4316 4317 4318 4319 4320
		return -ENAMETOOLONG;
	}
	hdrlen = (char *) xdr->p - (char *) iov->iov_base;
	recvd = req->rq_rcv_buf.len - hdrlen;
	if (recvd < len) {
4321
		dprintk("NFS: server cheating in readlink reply: "
L
Linus Torvalds 已提交
4322 4323 4324 4325 4326 4327 4328 4329 4330 4331 4332 4333 4334 4335 4336
				"count %u > recvd %u\n", len, recvd);
		return -EIO;
	}
	xdr_read_pages(xdr, len);
	/*
	 * The XDR encode routine has set things up so that
	 * the link text will be copied directly into the
	 * buffer.  We just have to do overflow-checking,
	 * and and null-terminate the text (the VFS expects
	 * null-termination).
	 */
	kaddr = (char *)kmap_atomic(rcvbuf->pages[0], KM_USER0);
	kaddr[len+rcvbuf->page_base] = '\0';
	kunmap_atomic(kaddr, KM_USER0);
	return 0;
B
Benny Halevy 已提交
4337 4338 4339
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
L
Linus Torvalds 已提交
4340 4341 4342 4343 4344 4345 4346 4347 4348 4349 4350 4351 4352 4353 4354 4355 4356 4357 4358 4359 4360 4361 4362 4363 4364 4365 4366 4367 4368 4369 4370 4371 4372 4373
}

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);
}

4374 4375 4376 4377 4378 4379
static int
decode_restorefh(struct xdr_stream *xdr)
{
	return decode_op_hdr(xdr, OP_RESTOREFH);
}

4380 4381 4382
static int decode_getacl(struct xdr_stream *xdr, struct rpc_rqst *req,
		size_t *acl_len)
{
A
Al Viro 已提交
4383
	__be32 *savep;
4384 4385 4386 4387 4388 4389 4390 4391 4392 4393 4394 4395 4396 4397 4398 4399
	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)) {
4400 4401
		size_t hdrlen;
		u32 recvd;
4402 4403 4404 4405 4406 4407

		/* 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) {
4408
			dprintk("NFS: server cheating in getattr"
4409 4410 4411 4412
					" acl reply: attrlen %u > recvd %u\n",
					attrlen, recvd);
			return -EINVAL;
		}
4413
		xdr_read_pages(xdr, attrlen);
4414
		*acl_len = attrlen;
J
J. Bruce Fields 已提交
4415 4416
	} else
		status = -EOPNOTSUPP;
4417 4418 4419 4420 4421

out:
	return status;
}

L
Linus Torvalds 已提交
4422 4423 4424 4425 4426 4427
static int
decode_savefh(struct xdr_stream *xdr)
{
	return decode_op_hdr(xdr, OP_SAVEFH);
}

4428
static int decode_setattr(struct xdr_stream *xdr)
L
Linus Torvalds 已提交
4429
{
A
Al Viro 已提交
4430
	__be32 *p;
L
Linus Torvalds 已提交
4431 4432 4433 4434 4435 4436
	uint32_t bmlen;
	int status;

	status = decode_op_hdr(xdr, OP_SETATTR);
	if (status)
		return status;
B
Benny Halevy 已提交
4437 4438 4439
	p = xdr_inline_decode(xdr, 4);
	if (unlikely(!p))
		goto out_overflow;
4440
	bmlen = be32_to_cpup(p);
B
Benny Halevy 已提交
4441 4442 4443 4444 4445 4446
	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
4447 4448
}

4449
static int decode_setclientid(struct xdr_stream *xdr, struct nfs4_setclientid_res *res)
L
Linus Torvalds 已提交
4450
{
A
Al Viro 已提交
4451
	__be32 *p;
L
Linus Torvalds 已提交
4452 4453 4454
	uint32_t opnum;
	int32_t nfserr;

B
Benny Halevy 已提交
4455 4456 4457
	p = xdr_inline_decode(xdr, 8);
	if (unlikely(!p))
		goto out_overflow;
B
Benny Halevy 已提交
4458
	opnum = be32_to_cpup(p++);
L
Linus Torvalds 已提交
4459
	if (opnum != OP_SETCLIENTID) {
4460
		dprintk("nfs: decode_setclientid: Server returned operation"
4461
			" %d\n", opnum);
L
Linus Torvalds 已提交
4462 4463
		return -EIO;
	}
4464
	nfserr = be32_to_cpup(p);
L
Linus Torvalds 已提交
4465
	if (nfserr == NFS_OK) {
B
Benny Halevy 已提交
4466 4467 4468
		p = xdr_inline_decode(xdr, 8 + NFS4_VERIFIER_SIZE);
		if (unlikely(!p))
			goto out_overflow;
4469 4470
		p = xdr_decode_hyper(p, &res->clientid);
		memcpy(res->confirm.data, p, NFS4_VERIFIER_SIZE);
L
Linus Torvalds 已提交
4471 4472 4473 4474
	} else if (nfserr == NFSERR_CLID_INUSE) {
		uint32_t len;

		/* skip netid string */
B
Benny Halevy 已提交
4475 4476 4477
		p = xdr_inline_decode(xdr, 4);
		if (unlikely(!p))
			goto out_overflow;
4478
		len = be32_to_cpup(p);
B
Benny Halevy 已提交
4479 4480 4481
		p = xdr_inline_decode(xdr, len);
		if (unlikely(!p))
			goto out_overflow;
L
Linus Torvalds 已提交
4482 4483

		/* skip uaddr string */
B
Benny Halevy 已提交
4484 4485 4486
		p = xdr_inline_decode(xdr, 4);
		if (unlikely(!p))
			goto out_overflow;
4487
		len = be32_to_cpup(p);
B
Benny Halevy 已提交
4488 4489 4490
		p = xdr_inline_decode(xdr, len);
		if (unlikely(!p))
			goto out_overflow;
L
Linus Torvalds 已提交
4491 4492
		return -NFSERR_CLID_INUSE;
	} else
4493
		return nfs4_stat_to_errno(nfserr);
L
Linus Torvalds 已提交
4494 4495

	return 0;
B
Benny Halevy 已提交
4496 4497 4498
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
L
Linus Torvalds 已提交
4499 4500 4501 4502 4503 4504 4505 4506 4507
}

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
4508
	__be32 *p;
L
Linus Torvalds 已提交
4509 4510 4511 4512 4513 4514
	int status;

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

B
Benny Halevy 已提交
4515 4516 4517
	p = xdr_inline_decode(xdr, 16);
	if (unlikely(!p))
		goto out_overflow;
B
Benny Halevy 已提交
4518 4519
	res->count = be32_to_cpup(p++);
	res->verf->committed = be32_to_cpup(p++);
B
Benny Halevy 已提交
4520
	memcpy(res->verf->verifier, p, 8);
L
Linus Torvalds 已提交
4521
	return 0;
B
Benny Halevy 已提交
4522 4523 4524
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
L
Linus Torvalds 已提交
4525 4526 4527 4528 4529 4530 4531
}

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

B
Benny Halevy 已提交
4532 4533 4534 4535 4536 4537
#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;
4538
	char *dummy_str;
B
Benny Halevy 已提交
4539 4540 4541 4542 4543 4544 4545
	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
4546 4547 4548
	p = xdr_inline_decode(xdr, 8);
	if (unlikely(!p))
		goto out_overflow;
4549
	xdr_decode_hyper(p, &clp->cl_ex_clid);
B
Benny Halevy 已提交
4550 4551 4552
	p = xdr_inline_decode(xdr, 12);
	if (unlikely(!p))
		goto out_overflow;
B
Benny Halevy 已提交
4553 4554
	clp->cl_seqid = be32_to_cpup(p++);
	clp->cl_exchange_flags = be32_to_cpup(p++);
B
Benny Halevy 已提交
4555 4556

	/* We ask for SP4_NONE */
4557
	dummy = be32_to_cpup(p);
B
Benny Halevy 已提交
4558 4559 4560 4561
	if (dummy != SP4_NONE)
		return -EIO;

	/* Throw away minor_id */
B
Benny Halevy 已提交
4562 4563 4564
	p = xdr_inline_decode(xdr, 8);
	if (unlikely(!p))
		goto out_overflow;
B
Benny Halevy 已提交
4565 4566

	/* Throw away Major id */
4567 4568 4569
	status = decode_opaque_inline(xdr, &dummy, &dummy_str);
	if (unlikely(status))
		return status;
B
Benny Halevy 已提交
4570 4571

	/* Throw away server_scope */
4572 4573 4574
	status = decode_opaque_inline(xdr, &dummy, &dummy_str);
	if (unlikely(status))
		return status;
B
Benny Halevy 已提交
4575 4576

	/* Throw away Implementation id array */
4577 4578 4579
	status = decode_opaque_inline(xdr, &dummy, &dummy_str);
	if (unlikely(status))
		return status;
B
Benny Halevy 已提交
4580 4581

	return 0;
B
Benny Halevy 已提交
4582 4583 4584
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
B
Benny Halevy 已提交
4585
}
A
Andy Adamson 已提交
4586 4587 4588 4589 4590 4591 4592

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
4593 4594 4595
	p = xdr_inline_decode(xdr, 28);
	if (unlikely(!p))
		goto out_overflow;
B
Benny Halevy 已提交
4596 4597 4598 4599 4600 4601
	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++);
4602
	nr_attrs = be32_to_cpup(p);
A
Andy Adamson 已提交
4603 4604 4605 4606 4607
	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
4608 4609 4610 4611 4612
	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
4613
	return 0;
B
Benny Halevy 已提交
4614 4615 4616
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
A
Andy Adamson 已提交
4617 4618
}

4619 4620 4621
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
4622 4623 4624 4625 4626 4627 4628 4629 4630 4631 4632
}

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);
4633 4634 4635
	if (!status)
		status = decode_sessionid(xdr, &session->sess_id);
	if (unlikely(status))
A
Andy Adamson 已提交
4636 4637 4638
		return status;

	/* seqid, flags */
B
Benny Halevy 已提交
4639 4640 4641
	p = xdr_inline_decode(xdr, 8);
	if (unlikely(!p))
		goto out_overflow;
B
Benny Halevy 已提交
4642
	clp->cl_seqid = be32_to_cpup(p++);
4643
	session->flags = be32_to_cpup(p);
A
Andy Adamson 已提交
4644 4645 4646 4647 4648 4649

	/* 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
4650 4651 4652
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
A
Andy Adamson 已提交
4653
}
A
Andy Adamson 已提交
4654 4655 4656 4657 4658

static int decode_destroy_session(struct xdr_stream *xdr, void *dummy)
{
	return decode_op_hdr(xdr, OP_DESTROY_SESSION);
}
4659 4660 4661 4662 4663

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
4664 4665
#endif /* CONFIG_NFS_V4_1 */

4666 4667 4668 4669 4670
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
4671 4672 4673 4674 4675 4676
	struct nfs4_slot *slot;
	struct nfs4_sessionid id;
	u32 dummy;
	int status;
	__be32 *p;

4677 4678 4679
	if (!res->sr_session)
		return 0;

A
Andy Adamson 已提交
4680
	status = decode_op_hdr(xdr, OP_SEQUENCE);
4681 4682 4683
	if (!status)
		status = decode_sessionid(xdr, &id);
	if (unlikely(status))
A
Andy Adamson 已提交
4684
		goto out_err;
4685

A
Andy Adamson 已提交
4686 4687 4688 4689
	/*
	 * If the server returns different values for sessionID, slotID or
	 * sequence number, the server is looney tunes.
	 */
4690
	status = -EREMOTEIO;
A
Andy Adamson 已提交
4691 4692 4693 4694 4695 4696

	if (memcmp(id.data, res->sr_session->sess_id.data,
		   NFS4_MAX_SESSIONID_LEN)) {
		dprintk("%s Invalid session id\n", __func__);
		goto out_err;
	}
4697

B
Benny Halevy 已提交
4698 4699 4700
	p = xdr_inline_decode(xdr, 20);
	if (unlikely(!p))
		goto out_overflow;
4701

A
Andy Adamson 已提交
4702
	/* seqid */
4703
	slot = &res->sr_session->fc_slot_table.slots[res->sr_slotid];
B
Benny Halevy 已提交
4704
	dummy = be32_to_cpup(p++);
A
Andy Adamson 已提交
4705 4706 4707 4708 4709
	if (dummy != slot->seq_nr) {
		dprintk("%s Invalid sequence number\n", __func__);
		goto out_err;
	}
	/* slot id */
B
Benny Halevy 已提交
4710
	dummy = be32_to_cpup(p++);
A
Andy Adamson 已提交
4711 4712 4713 4714 4715
	if (dummy != res->sr_slotid) {
		dprintk("%s Invalid slot id\n", __func__);
		goto out_err;
	}
	/* highest slot id - currently not processed */
B
Benny Halevy 已提交
4716
	dummy = be32_to_cpup(p++);
A
Andy Adamson 已提交
4717
	/* target highest slot id - currently not processed */
B
Benny Halevy 已提交
4718
	dummy = be32_to_cpup(p++);
4719 4720
	/* result flags */
	res->sr_status_flags = be32_to_cpup(p);
A
Andy Adamson 已提交
4721 4722 4723 4724
	status = 0;
out_err:
	res->sr_status = status;
	return status;
B
Benny Halevy 已提交
4725 4726 4727 4728
out_overflow:
	print_overflow_msg(__func__, xdr);
	status = -EIO;
	goto out_err;
A
Andy Adamson 已提交
4729
#else  /* CONFIG_NFS_V4_1 */
4730
	return 0;
A
Andy Adamson 已提交
4731
#endif /* CONFIG_NFS_V4_1 */
4732 4733
}

4734 4735 4736 4737
/*
 * END OF "GENERIC" DECODE ROUTINES.
 */

L
Linus Torvalds 已提交
4738 4739 4740
/*
 * Decode OPEN_DOWNGRADE response
 */
A
Al Viro 已提交
4741
static int nfs4_xdr_dec_open_downgrade(struct rpc_rqst *rqstp, __be32 *p, struct nfs_closeres *res)
L
Linus Torvalds 已提交
4742
{
A
Andy Adamson 已提交
4743 4744 4745 4746 4747 4748
	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);
4749 4750 4751
	if (status)
		goto out;
	status = decode_sequence(&xdr, &res->seq_res, rqstp);
A
Andy Adamson 已提交
4752 4753 4754 4755 4756 4757
	if (status)
		goto out;
	status = decode_putfh(&xdr);
	if (status)
		goto out;
	status = decode_open_downgrade(&xdr, res);
4758 4759
	if (status != 0)
		goto out;
4760 4761
	decode_getfattr(&xdr, res->fattr, res->server,
			!RPC_IS_ASYNC(rqstp->rq_task));
L
Linus Torvalds 已提交
4762
out:
A
Andy Adamson 已提交
4763
	return status;
L
Linus Torvalds 已提交
4764 4765 4766 4767 4768
}

/*
 * Decode ACCESS response
 */
A
Al Viro 已提交
4769
static int nfs4_xdr_dec_access(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_accessres *res)
L
Linus Torvalds 已提交
4770 4771 4772 4773
{
	struct xdr_stream xdr;
	struct compound_hdr hdr;
	int status;
4774

L
Linus Torvalds 已提交
4775
	xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4776 4777 4778 4779 4780
	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
4781
		goto out;
4782 4783 4784 4785 4786 4787
	status = decode_putfh(&xdr);
	if (status != 0)
		goto out;
	status = decode_access(&xdr, res);
	if (status != 0)
		goto out;
4788 4789
	decode_getfattr(&xdr, res->fattr, res->server,
			!RPC_IS_ASYNC(rqstp->rq_task));
L
Linus Torvalds 已提交
4790 4791 4792 4793 4794 4795 4796
out:
	return status;
}

/*
 * Decode LOOKUP response
 */
A
Al Viro 已提交
4797
static int nfs4_xdr_dec_lookup(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_lookup_res *res)
L
Linus Torvalds 已提交
4798 4799 4800 4801
{
	struct xdr_stream xdr;
	struct compound_hdr hdr;
	int status;
4802

L
Linus Torvalds 已提交
4803
	xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4804 4805 4806 4807 4808
	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
4809 4810 4811 4812 4813 4814 4815
		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;
4816 4817
	status = decode_getfattr(&xdr, res->fattr, res->server
			,!RPC_IS_ASYNC(rqstp->rq_task));
L
Linus Torvalds 已提交
4818 4819 4820 4821 4822 4823 4824
out:
	return status;
}

/*
 * Decode LOOKUP_ROOT response
 */
A
Al Viro 已提交
4825
static int nfs4_xdr_dec_lookup_root(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_lookup_res *res)
L
Linus Torvalds 已提交
4826 4827 4828 4829
{
	struct xdr_stream xdr;
	struct compound_hdr hdr;
	int status;
4830

L
Linus Torvalds 已提交
4831
	xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4832 4833 4834 4835 4836
	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
4837 4838 4839 4840
		goto out;
	if ((status = decode_putrootfh(&xdr)) != 0)
		goto out;
	if ((status = decode_getfh(&xdr, res->fh)) == 0)
4841 4842
		status = decode_getfattr(&xdr, res->fattr, res->server,
				!RPC_IS_ASYNC(rqstp->rq_task));
L
Linus Torvalds 已提交
4843 4844 4845 4846 4847 4848 4849
out:
	return status;
}

/*
 * Decode REMOVE response
 */
4850
static int nfs4_xdr_dec_remove(struct rpc_rqst *rqstp, __be32 *p, struct nfs_removeres *res)
L
Linus Torvalds 已提交
4851 4852 4853 4854
{
	struct xdr_stream xdr;
	struct compound_hdr hdr;
	int status;
4855

L
Linus Torvalds 已提交
4856
	xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4857 4858 4859 4860 4861
	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
4862
		goto out;
4863 4864 4865 4866
	if ((status = decode_putfh(&xdr)) != 0)
		goto out;
	if ((status = decode_remove(&xdr, &res->cinfo)) != 0)
		goto out;
4867
	decode_getfattr(&xdr, res->dir_attr, res->server,
4868
			!RPC_IS_ASYNC(rqstp->rq_task));
L
Linus Torvalds 已提交
4869 4870 4871 4872 4873 4874 4875
out:
	return status;
}

/*
 * Decode RENAME response
 */
A
Al Viro 已提交
4876
static int nfs4_xdr_dec_rename(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_rename_res *res)
L
Linus Torvalds 已提交
4877 4878 4879 4880
{
	struct xdr_stream xdr;
	struct compound_hdr hdr;
	int status;
4881

L
Linus Torvalds 已提交
4882
	xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4883 4884 4885 4886 4887
	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
4888 4889 4890 4891 4892 4893 4894
		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;
4895 4896 4897
	if ((status = decode_rename(&xdr, &res->old_cinfo, &res->new_cinfo)) != 0)
		goto out;
	/* Current FH is target directory */
4898 4899
	if (decode_getfattr(&xdr, res->new_fattr, res->server,
				!RPC_IS_ASYNC(rqstp->rq_task)) != 0)
4900 4901 4902
		goto out;
	if ((status = decode_restorefh(&xdr)) != 0)
		goto out;
4903 4904
	decode_getfattr(&xdr, res->old_fattr, res->server,
			!RPC_IS_ASYNC(rqstp->rq_task));
L
Linus Torvalds 已提交
4905 4906 4907 4908 4909 4910 4911
out:
	return status;
}

/*
 * Decode LINK response
 */
A
Al Viro 已提交
4912
static int nfs4_xdr_dec_link(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_link_res *res)
L
Linus Torvalds 已提交
4913 4914 4915 4916
{
	struct xdr_stream xdr;
	struct compound_hdr hdr;
	int status;
4917

L
Linus Torvalds 已提交
4918
	xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4919 4920 4921 4922 4923
	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
4924 4925 4926 4927 4928 4929 4930
		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;
4931 4932 4933 4934 4935 4936
	if ((status = decode_link(&xdr, &res->cinfo)) != 0)
		goto out;
	/*
	 * Note order: OP_LINK leaves the directory as the current
	 *             filehandle.
	 */
4937 4938
	if (decode_getfattr(&xdr, res->dir_attr, res->server,
				!RPC_IS_ASYNC(rqstp->rq_task)) != 0)
4939 4940 4941
		goto out;
	if ((status = decode_restorefh(&xdr)) != 0)
		goto out;
4942 4943
	decode_getfattr(&xdr, res->fattr, res->server,
			!RPC_IS_ASYNC(rqstp->rq_task));
L
Linus Torvalds 已提交
4944 4945 4946 4947 4948 4949 4950
out:
	return status;
}

/*
 * Decode CREATE response
 */
A
Al Viro 已提交
4951
static int nfs4_xdr_dec_create(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_create_res *res)
L
Linus Torvalds 已提交
4952 4953 4954 4955
{
	struct xdr_stream xdr;
	struct compound_hdr hdr;
	int status;
4956

L
Linus Torvalds 已提交
4957
	xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4958 4959 4960 4961 4962
	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
4963 4964 4965
		goto out;
	if ((status = decode_putfh(&xdr)) != 0)
		goto out;
4966 4967
	if ((status = decode_savefh(&xdr)) != 0)
		goto out;
L
Linus Torvalds 已提交
4968 4969 4970 4971
	if ((status = decode_create(&xdr,&res->dir_cinfo)) != 0)
		goto out;
	if ((status = decode_getfh(&xdr, res->fh)) != 0)
		goto out;
4972 4973
	if (decode_getfattr(&xdr, res->fattr, res->server,
				!RPC_IS_ASYNC(rqstp->rq_task)) != 0)
4974 4975 4976
		goto out;
	if ((status = decode_restorefh(&xdr)) != 0)
		goto out;
4977 4978
	decode_getfattr(&xdr, res->dir_fattr, res->server,
			!RPC_IS_ASYNC(rqstp->rq_task));
L
Linus Torvalds 已提交
4979 4980 4981 4982 4983 4984 4985
out:
	return status;
}

/*
 * Decode SYMLINK response
 */
A
Al Viro 已提交
4986
static int nfs4_xdr_dec_symlink(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_create_res *res)
L
Linus Torvalds 已提交
4987 4988 4989 4990 4991 4992 4993
{
	return nfs4_xdr_dec_create(rqstp, p, res);
}

/*
 * Decode GETATTR response
 */
A
Al Viro 已提交
4994
static int nfs4_xdr_dec_getattr(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_getattr_res *res)
L
Linus Torvalds 已提交
4995 4996 4997 4998
{
	struct xdr_stream xdr;
	struct compound_hdr hdr;
	int status;
4999

L
Linus Torvalds 已提交
5000 5001
	xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
	status = decode_compound_hdr(&xdr, &hdr);
5002 5003 5004
	if (status)
		goto out;
	status = decode_sequence(&xdr, &res->seq_res, rqstp);
L
Linus Torvalds 已提交
5005 5006 5007 5008 5009
	if (status)
		goto out;
	status = decode_putfh(&xdr);
	if (status)
		goto out;
5010 5011
	status = decode_getfattr(&xdr, res->fattr, res->server,
			!RPC_IS_ASYNC(rqstp->rq_task));
L
Linus Torvalds 已提交
5012 5013 5014 5015
out:
	return status;
}

5016 5017 5018 5019
/*
 * Encode an SETACL request
 */
static int
A
Al Viro 已提交
5020
nfs4_xdr_enc_setacl(struct rpc_rqst *req, __be32 *p, struct nfs_setaclargs *args)
5021
{
A
Andy Adamson 已提交
5022 5023
	struct xdr_stream xdr;
	struct compound_hdr hdr = {
5024
		.minorversion = nfs4_xdr_minorversion(&args->seq_args),
A
Andy Adamson 已提交
5025 5026 5027 5028
	};
	int status;

	xdr_init_encode(&xdr, &req->rq_snd_buf, p);
5029
	encode_compound_hdr(&xdr, req, &hdr);
5030
	encode_sequence(&xdr, &args->seq_args, &hdr);
5031
	encode_putfh(&xdr, args->fh, &hdr);
5032 5033
	status = encode_setacl(&xdr, args, &hdr);
	encode_nops(&hdr);
A
Andy Adamson 已提交
5034
	return status;
5035
}
A
Andy Adamson 已提交
5036

5037 5038 5039 5040
/*
 * Decode SETACL response
 */
static int
B
Benny Halevy 已提交
5041 5042
nfs4_xdr_dec_setacl(struct rpc_rqst *rqstp, __be32 *p,
		    struct nfs_setaclres *res)
5043 5044 5045 5046 5047 5048 5049
{
	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);
5050 5051 5052
	if (status)
		goto out;
	status = decode_sequence(&xdr, &res->seq_res, rqstp);
5053 5054 5055 5056 5057
	if (status)
		goto out;
	status = decode_putfh(&xdr);
	if (status)
		goto out;
5058
	status = decode_setattr(&xdr);
5059 5060 5061
out:
	return status;
}
L
Linus Torvalds 已提交
5062

5063 5064 5065 5066
/*
 * Decode GETACL response
 */
static int
B
Benny Halevy 已提交
5067 5068
nfs4_xdr_dec_getacl(struct rpc_rqst *rqstp, __be32 *p,
		    struct nfs_getaclres *res)
5069 5070 5071 5072 5073 5074 5075
{
	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);
5076 5077 5078
	if (status)
		goto out;
	status = decode_sequence(&xdr, &res->seq_res, rqstp);
5079 5080 5081 5082 5083
	if (status)
		goto out;
	status = decode_putfh(&xdr);
	if (status)
		goto out;
B
Benny Halevy 已提交
5084
	status = decode_getacl(&xdr, rqstp, &res->acl_len);
5085 5086 5087 5088 5089

out:
	return status;
}

L
Linus Torvalds 已提交
5090 5091 5092
/*
 * Decode CLOSE response
 */
A
Al Viro 已提交
5093
static int nfs4_xdr_dec_close(struct rpc_rqst *rqstp, __be32 *p, struct nfs_closeres *res)
L
Linus Torvalds 已提交
5094
{
A
Andy Adamson 已提交
5095 5096 5097 5098 5099 5100
	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);
5101 5102 5103
	if (status)
		goto out;
	status = decode_sequence(&xdr, &res->seq_res, rqstp);
A
Andy Adamson 已提交
5104 5105 5106 5107 5108 5109
	if (status)
		goto out;
	status = decode_putfh(&xdr);
	if (status)
		goto out;
	status = decode_close(&xdr, res);
5110 5111 5112 5113 5114 5115 5116 5117
	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.
	 */
5118 5119
	decode_getfattr(&xdr, res->fattr, res->server,
			!RPC_IS_ASYNC(rqstp->rq_task));
L
Linus Torvalds 已提交
5120
out:
A
Andy Adamson 已提交
5121
	return status;
L
Linus Torvalds 已提交
5122 5123 5124 5125 5126
}

/*
 * Decode OPEN response
 */
A
Al Viro 已提交
5127
static int nfs4_xdr_dec_open(struct rpc_rqst *rqstp, __be32 *p, struct nfs_openres *res)
L
Linus Torvalds 已提交
5128
{
A
Andy Adamson 已提交
5129 5130 5131 5132 5133 5134
	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);
5135 5136 5137
	if (status)
		goto out;
	status = decode_sequence(&xdr, &res->seq_res, rqstp);
A
Andy Adamson 已提交
5138 5139 5140 5141 5142 5143 5144 5145 5146
	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);
5147 5148
	if (status)
		goto out;
5149
	if (decode_getfh(&xdr, &res->fh) != 0)
L
Linus Torvalds 已提交
5150
		goto out;
5151 5152
	if (decode_getfattr(&xdr, res->f_attr, res->server,
				!RPC_IS_ASYNC(rqstp->rq_task)) != 0)
5153
		goto out;
5154
	if (decode_restorefh(&xdr) != 0)
5155
		goto out;
5156 5157
	decode_getfattr(&xdr, res->dir_attr, res->server,
			!RPC_IS_ASYNC(rqstp->rq_task));
L
Linus Torvalds 已提交
5158
out:
A
Andy Adamson 已提交
5159
	return status;
L
Linus Torvalds 已提交
5160 5161 5162 5163 5164
}

/*
 * Decode OPEN_CONFIRM response
 */
A
Al Viro 已提交
5165
static int nfs4_xdr_dec_open_confirm(struct rpc_rqst *rqstp, __be32 *p, struct nfs_open_confirmres *res)
L
Linus Torvalds 已提交
5166
{
A
Andy Adamson 已提交
5167 5168 5169 5170 5171 5172 5173 5174 5175 5176 5177 5178
	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
5179
out:
A
Andy Adamson 已提交
5180
	return status;
L
Linus Torvalds 已提交
5181 5182 5183 5184 5185
}

/*
 * Decode OPEN response
 */
A
Al Viro 已提交
5186
static int nfs4_xdr_dec_open_noattr(struct rpc_rqst *rqstp, __be32 *p, struct nfs_openres *res)
L
Linus Torvalds 已提交
5187
{
A
Andy Adamson 已提交
5188 5189 5190 5191 5192 5193
	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);
5194 5195 5196
	if (status)
		goto out;
	status = decode_sequence(&xdr, &res->seq_res, rqstp);
A
Andy Adamson 已提交
5197 5198 5199 5200 5201 5202 5203 5204
	if (status)
		goto out;
	status = decode_putfh(&xdr);
	if (status)
		goto out;
	status = decode_open(&xdr, res);
	if (status)
		goto out;
5205 5206
	decode_getfattr(&xdr, res->f_attr, res->server,
			!RPC_IS_ASYNC(rqstp->rq_task));
L
Linus Torvalds 已提交
5207
out:
A
Andy Adamson 已提交
5208
	return status;
L
Linus Torvalds 已提交
5209 5210 5211 5212 5213
}

/*
 * Decode SETATTR response
 */
A
Al Viro 已提交
5214
static int nfs4_xdr_dec_setattr(struct rpc_rqst *rqstp, __be32 *p, struct nfs_setattrres *res)
L
Linus Torvalds 已提交
5215
{
A
Andy Adamson 已提交
5216 5217 5218 5219 5220 5221
	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);
5222 5223 5224
	if (status)
		goto out;
	status = decode_sequence(&xdr, &res->seq_res, rqstp);
A
Andy Adamson 已提交
5225 5226 5227 5228 5229
	if (status)
		goto out;
	status = decode_putfh(&xdr);
	if (status)
		goto out;
5230
	status = decode_setattr(&xdr);
A
Andy Adamson 已提交
5231 5232
	if (status)
		goto out;
5233 5234
	decode_getfattr(&xdr, res->fattr, res->server,
			!RPC_IS_ASYNC(rqstp->rq_task));
L
Linus Torvalds 已提交
5235
out:
A
Andy Adamson 已提交
5236
	return status;
L
Linus Torvalds 已提交
5237 5238 5239 5240 5241
}

/*
 * Decode LOCK response
 */
A
Al Viro 已提交
5242
static int nfs4_xdr_dec_lock(struct rpc_rqst *rqstp, __be32 *p, struct nfs_lock_res *res)
L
Linus Torvalds 已提交
5243 5244 5245 5246 5247 5248 5249
{
	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);
5250 5251 5252
	if (status)
		goto out;
	status = decode_sequence(&xdr, &res->seq_res, rqstp);
L
Linus Torvalds 已提交
5253 5254 5255 5256 5257 5258 5259 5260 5261 5262 5263 5264 5265
	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
5266
static int nfs4_xdr_dec_lockt(struct rpc_rqst *rqstp, __be32 *p, struct nfs_lockt_res *res)
L
Linus Torvalds 已提交
5267 5268 5269 5270 5271 5272 5273
{
	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);
5274 5275 5276
	if (status)
		goto out;
	status = decode_sequence(&xdr, &res->seq_res, rqstp);
L
Linus Torvalds 已提交
5277 5278 5279 5280 5281 5282 5283 5284 5285 5286 5287 5288 5289
	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
5290
static int nfs4_xdr_dec_locku(struct rpc_rqst *rqstp, __be32 *p, struct nfs_locku_res *res)
L
Linus Torvalds 已提交
5291 5292 5293 5294 5295 5296 5297
{
	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);
5298 5299 5300
	if (status)
		goto out;
	status = decode_sequence(&xdr, &res->seq_res, rqstp);
L
Linus Torvalds 已提交
5301 5302 5303 5304 5305 5306 5307 5308 5309 5310
	if (status)
		goto out;
	status = decode_putfh(&xdr);
	if (status)
		goto out;
	status = decode_locku(&xdr, res);
out:
	return status;
}

5311 5312 5313 5314 5315 5316 5317 5318 5319 5320 5321 5322 5323
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
5324 5325 5326
/*
 * Decode READLINK response
 */
B
Benny Halevy 已提交
5327 5328
static int nfs4_xdr_dec_readlink(struct rpc_rqst *rqstp, __be32 *p,
				 struct nfs4_readlink_res *res)
L
Linus Torvalds 已提交
5329 5330 5331 5332 5333 5334 5335
{
	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);
5336 5337 5338
	if (status)
		goto out;
	status = decode_sequence(&xdr, &res->seq_res, rqstp);
L
Linus Torvalds 已提交
5339 5340 5341 5342 5343 5344 5345 5346 5347 5348 5349 5350 5351
	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
5352
static int nfs4_xdr_dec_readdir(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_readdir_res *res)
L
Linus Torvalds 已提交
5353 5354 5355 5356 5357 5358 5359
{
	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);
5360 5361 5362
	if (status)
		goto out;
	status = decode_sequence(&xdr, &res->seq_res, rqstp);
L
Linus Torvalds 已提交
5363 5364 5365 5366 5367 5368 5369 5370 5371 5372 5373 5374 5375
	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
5376
static int nfs4_xdr_dec_read(struct rpc_rqst *rqstp, __be32 *p, struct nfs_readres *res)
L
Linus Torvalds 已提交
5377 5378 5379 5380 5381 5382 5383
{
	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);
5384 5385 5386
	if (status)
		goto out;
	status = decode_sequence(&xdr, &res->seq_res, rqstp);
L
Linus Torvalds 已提交
5387 5388 5389 5390 5391 5392 5393 5394 5395 5396 5397 5398 5399 5400 5401
	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
5402
static int nfs4_xdr_dec_write(struct rpc_rqst *rqstp, __be32 *p, struct nfs_writeres *res)
L
Linus Torvalds 已提交
5403 5404 5405 5406 5407 5408 5409
{
	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);
5410 5411 5412
	if (status)
		goto out;
	status = decode_sequence(&xdr, &res->seq_res, rqstp);
L
Linus Torvalds 已提交
5413 5414 5415 5416 5417 5418
	if (status)
		goto out;
	status = decode_putfh(&xdr);
	if (status)
		goto out;
	status = decode_write(&xdr, res);
5419 5420
	if (status)
		goto out;
5421 5422
	decode_getfattr(&xdr, res->fattr, res->server,
			!RPC_IS_ASYNC(rqstp->rq_task));
L
Linus Torvalds 已提交
5423 5424 5425 5426 5427 5428 5429 5430 5431
	if (!status)
		status = res->count;
out:
	return status;
}

/*
 * Decode COMMIT response
 */
A
Al Viro 已提交
5432
static int nfs4_xdr_dec_commit(struct rpc_rqst *rqstp, __be32 *p, struct nfs_writeres *res)
L
Linus Torvalds 已提交
5433 5434 5435 5436 5437 5438 5439
{
	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);
5440 5441 5442
	if (status)
		goto out;
	status = decode_sequence(&xdr, &res->seq_res, rqstp);
L
Linus Torvalds 已提交
5443 5444 5445 5446 5447 5448
	if (status)
		goto out;
	status = decode_putfh(&xdr);
	if (status)
		goto out;
	status = decode_commit(&xdr, res);
5449 5450
	if (status)
		goto out;
5451 5452
	decode_getfattr(&xdr, res->fattr, res->server,
			!RPC_IS_ASYNC(rqstp->rq_task));
L
Linus Torvalds 已提交
5453 5454 5455 5456 5457
out:
	return status;
}

/*
5458
 * Decode FSINFO response
L
Linus Torvalds 已提交
5459
 */
B
Benny Halevy 已提交
5460 5461
static int nfs4_xdr_dec_fsinfo(struct rpc_rqst *req, __be32 *p,
			       struct nfs4_fsinfo_res *res)
L
Linus Torvalds 已提交
5462 5463 5464 5465 5466 5467 5468
{
	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);
5469 5470
	if (!status)
		status = decode_sequence(&xdr, &res->seq_res, req);
L
Linus Torvalds 已提交
5471 5472 5473
	if (!status)
		status = decode_putfh(&xdr);
	if (!status)
B
Benny Halevy 已提交
5474
		status = decode_fsinfo(&xdr, res->fsinfo);
L
Linus Torvalds 已提交
5475 5476 5477 5478
	return status;
}

/*
5479
 * Decode PATHCONF response
L
Linus Torvalds 已提交
5480
 */
B
Benny Halevy 已提交
5481 5482
static int nfs4_xdr_dec_pathconf(struct rpc_rqst *req, __be32 *p,
				 struct nfs4_pathconf_res *res)
L
Linus Torvalds 已提交
5483 5484 5485 5486 5487 5488 5489
{
	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);
5490 5491
	if (!status)
		status = decode_sequence(&xdr, &res->seq_res, req);
L
Linus Torvalds 已提交
5492 5493 5494
	if (!status)
		status = decode_putfh(&xdr);
	if (!status)
B
Benny Halevy 已提交
5495
		status = decode_pathconf(&xdr, res->pathconf);
L
Linus Torvalds 已提交
5496 5497 5498 5499
	return status;
}

/*
5500
 * Decode STATFS response
L
Linus Torvalds 已提交
5501
 */
B
Benny Halevy 已提交
5502 5503
static int nfs4_xdr_dec_statfs(struct rpc_rqst *req, __be32 *p,
			       struct nfs4_statfs_res *res)
L
Linus Torvalds 已提交
5504 5505 5506 5507 5508 5509 5510
{
	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);
5511 5512
	if (!status)
		status = decode_sequence(&xdr, &res->seq_res, req);
L
Linus Torvalds 已提交
5513 5514 5515
	if (!status)
		status = decode_putfh(&xdr);
	if (!status)
B
Benny Halevy 已提交
5516
		status = decode_statfs(&xdr, res->fsstat);
L
Linus Torvalds 已提交
5517 5518 5519 5520
	return status;
}

/*
5521
 * Decode GETATTR_BITMAP response
L
Linus Torvalds 已提交
5522
 */
A
Al Viro 已提交
5523
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
5524 5525 5526 5527 5528 5529
{
	struct xdr_stream xdr;
	struct compound_hdr hdr;
	int status;

	xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
5530 5531 5532 5533 5534
	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
5535 5536 5537 5538 5539 5540 5541 5542 5543 5544 5545
		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
5546
static int nfs4_xdr_dec_renew(struct rpc_rqst *rqstp, __be32 *p, void *dummy)
L
Linus Torvalds 已提交
5547 5548 5549 5550 5551 5552 5553 5554 5555 5556 5557 5558 5559
{
	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;
}

/*
5560
 * Decode SETCLIENTID response
L
Linus Torvalds 已提交
5561
 */
A
Al Viro 已提交
5562
static int nfs4_xdr_dec_setclientid(struct rpc_rqst *req, __be32 *p,
5563
		struct nfs4_setclientid_res *res)
L
Linus Torvalds 已提交
5564 5565 5566 5567 5568 5569 5570 5571
{
	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)
5572
		status = decode_setclientid(&xdr, res);
L
Linus Torvalds 已提交
5573 5574 5575 5576
	return status;
}

/*
5577
 * Decode SETCLIENTID_CONFIRM response
L
Linus Torvalds 已提交
5578
 */
A
Al Viro 已提交
5579
static int nfs4_xdr_dec_setclientid_confirm(struct rpc_rqst *req, __be32 *p, struct nfs_fsinfo *fsinfo)
L
Linus Torvalds 已提交
5580 5581 5582 5583 5584 5585 5586 5587 5588 5589 5590 5591 5592 5593 5594 5595 5596
{
	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;
}

/*
5597
 * Decode DELEGRETURN response
L
Linus Torvalds 已提交
5598
 */
A
Al Viro 已提交
5599
static int nfs4_xdr_dec_delegreturn(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_delegreturnres *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 5610
	if (status)
		goto out;
	status = decode_sequence(&xdr, &res->seq_res, rqstp);
	if (status)
5611 5612 5613 5614 5615
		goto out;
	status = decode_putfh(&xdr);
	if (status != 0)
		goto out;
	status = decode_delegreturn(&xdr);
5616 5617
	if (status != 0)
		goto out;
5618 5619
	decode_getfattr(&xdr, res->fattr, res->server,
			!RPC_IS_ASYNC(rqstp->rq_task));
5620
out:
L
Linus Torvalds 已提交
5621 5622 5623
	return status;
}

5624
/*
5625
 * Decode FS_LOCATIONS response
5626
 */
B
Benny Halevy 已提交
5627 5628
static int nfs4_xdr_dec_fs_locations(struct rpc_rqst *req, __be32 *p,
				     struct nfs4_fs_locations_res *res)
5629 5630 5631 5632 5633 5634 5635
{
	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);
5636 5637 5638 5639
	if (status)
		goto out;
	status = decode_sequence(&xdr, &res->seq_res, req);
	if (status)
5640 5641 5642 5643 5644 5645
		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
5646
	status = decode_getfattr(&xdr, &res->fs_locations->fattr,
5647 5648
				 res->fs_locations->server,
				 !RPC_IS_ASYNC(req->rq_task));
5649 5650 5651 5652
out:
	return status;
}

B
Benny Halevy 已提交
5653 5654
#if defined(CONFIG_NFS_V4_1)
/*
5655
 * Decode EXCHANGE_ID response
B
Benny Halevy 已提交
5656 5657 5658 5659 5660 5661 5662 5663 5664 5665 5666 5667 5668 5669
 */
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
5670

A
Andy Adamson 已提交
5671
/*
5672
 * Decode CREATE_SESSION response
A
Andy Adamson 已提交
5673 5674 5675 5676 5677 5678 5679 5680 5681 5682 5683 5684 5685 5686 5687
 */
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
5688
/*
5689
 * Decode DESTROY_SESSION response
A
Andy Adamson 已提交
5690 5691 5692 5693 5694 5695 5696 5697 5698 5699 5700 5701 5702 5703 5704
 */
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
5705
/*
5706
 * Decode SEQUENCE response
A
Andy Adamson 已提交
5707 5708 5709 5710 5711 5712 5713 5714 5715 5716 5717 5718 5719 5720 5721
 */
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
5722
/*
5723
 * Decode GET_LEASE_TIME response
A
Andy Adamson 已提交
5724 5725 5726 5727 5728 5729 5730 5731 5732 5733 5734 5735 5736 5737 5738 5739 5740 5741
 */
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;
}
5742 5743 5744 5745 5746 5747 5748 5749 5750 5751 5752 5753 5754 5755 5756 5757 5758 5759 5760

/*
 * Decode RECLAIM_COMPLETE response
 */
static int nfs4_xdr_dec_reclaim_complete(struct rpc_rqst *rqstp, uint32_t *p,
					 struct nfs41_reclaim_complete_res *res)
{
	struct xdr_stream xdr;
	struct compound_hdr hdr;
	int status;

	xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
	status = decode_compound_hdr(&xdr, &hdr);
	if (!status)
		status = decode_sequence(&xdr, &res->seq_res, rqstp);
	if (!status)
		status = decode_reclaim_complete(&xdr, (void *)NULL);
	return status;
}
B
Benny Halevy 已提交
5761 5762
#endif /* CONFIG_NFS_V4_1 */

5763
__be32 *nfs4_decode_dirent(__be32 *p, struct nfs_entry *entry, int plus)
L
Linus Torvalds 已提交
5764 5765 5766 5767 5768 5769 5770 5771 5772 5773 5774 5775 5776 5777 5778 5779 5780 5781 5782 5783 5784 5785 5786 5787 5788 5789 5790 5791 5792 5793 5794 5795 5796 5797
{
	uint32_t bitmap[2] = {0};
	uint32_t len;

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

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

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

	len = ntohl(*p++);		/* bitmap length */
	if (len-- > 0) {
		bitmap[0] = ntohl(*p++);
		if (len-- > 0) {
			bitmap[1] = ntohl(*p++);
			p += len;
		}
	}
	len = XDR_QUADLEN(ntohl(*p++));	/* attribute buffer length */
	if (len > 0) {
5798 5799 5800 5801 5802 5803
		if (bitmap[0] & FATTR4_WORD0_RDATTR_ERROR) {
			bitmap[0] &= ~FATTR4_WORD0_RDATTR_ERROR;
			/* Ignore the return value of rdattr_error for now */
			p++;
			len--;
		}
L
Linus Torvalds 已提交
5804 5805 5806 5807 5808 5809 5810 5811 5812 5813 5814 5815 5816 5817 5818 5819 5820 5821 5822 5823
		if (bitmap[0] == 0 && bitmap[1] == FATTR4_WORD1_MOUNTED_ON_FILEID)
			xdr_decode_hyper(p, &entry->ino);
		else if (bitmap[0] == FATTR4_WORD0_FILEID)
			xdr_decode_hyper(p, &entry->ino);
		p += len;
	}

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

/*
 * We need to translate between nfs status return values and
 * the local errno values which may not be the same.
 */
static struct {
	int stat;
	int errno;
} nfs_errtbl[] = {
	{ NFS4_OK,		0		},
5824 5825 5826 5827 5828 5829 5830 5831 5832 5833 5834 5835 5836 5837 5838 5839 5840 5841 5842 5843 5844 5845 5846 5847
	{ 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	},
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	{ NFS4ERR_SERVERFAULT,	-EREMOTEIO	},
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	{ NFS4ERR_BADTYPE,	-EBADTYPE	},
	{ NFS4ERR_LOCKED,	-EAGAIN		},
	{ NFS4ERR_SYMLINK,	-ELOOP		},
	{ NFS4ERR_OP_ILLEGAL,	-EOPNOTSUPP	},
	{ NFS4ERR_DEADLOCK,	-EDEADLK	},
	{ NFS4ERR_WRONGSEC,	-EPERM		}, /* FIXME: this needs
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						    * to be handled by a
						    * middle-layer.
						    */
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	{ -1,			-EIO		}
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};

/*
 * Convert an NFS error code to a local one.
 * This one is used jointly by NFSv2 and NFSv3.
 */
static int
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nfs4_stat_to_errno(int stat)
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{
	int i;
	for (i = 0; nfs_errtbl[i].stat != -1; i++) {
		if (nfs_errtbl[i].stat == stat)
			return nfs_errtbl[i].errno;
	}
	if (stat <= 10000 || stat > 10100) {
		/* The server is looney tunes. */
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		return -EREMOTEIO;
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	}
	/* If we cannot translate the error, the recovery routines should
	 * handle it.
	 * Note: remaining NFSv4 error codes have values > 10000, so should
	 * not conflict with native Linux error codes.
	 */
5882
	return -stat;
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}

#define PROC(proc, argtype, restype)				\
[NFSPROC4_CLNT_##proc] = {					\
	.p_proc   = NFSPROC4_COMPOUND,				\
	.p_encode = (kxdrproc_t) nfs4_xdr_##argtype,		\
	.p_decode = (kxdrproc_t) nfs4_xdr_##restype,		\
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	.p_arglen = NFS4_##argtype##_sz,			\
	.p_replen = NFS4_##restype##_sz,			\
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	.p_statidx = NFSPROC4_CLNT_##proc,			\
	.p_name   = #proc,					\
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}
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struct rpc_procinfo	nfs4_procedures[] = {
  PROC(READ,		enc_read,	dec_read),
  PROC(WRITE,		enc_write,	dec_write),
  PROC(COMMIT,		enc_commit,	dec_commit),
  PROC(OPEN,		enc_open,	dec_open),
  PROC(OPEN_CONFIRM,	enc_open_confirm,	dec_open_confirm),
  PROC(OPEN_NOATTR,	enc_open_noattr,	dec_open_noattr),
  PROC(OPEN_DOWNGRADE,	enc_open_downgrade,	dec_open_downgrade),
  PROC(CLOSE,		enc_close,	dec_close),
  PROC(SETATTR,		enc_setattr,	dec_setattr),
  PROC(FSINFO,		enc_fsinfo,	dec_fsinfo),
  PROC(RENEW,		enc_renew,	dec_renew),
  PROC(SETCLIENTID,	enc_setclientid,	dec_setclientid),
  PROC(SETCLIENTID_CONFIRM,	enc_setclientid_confirm,	dec_setclientid_confirm),
  PROC(LOCK,            enc_lock,       dec_lock),
  PROC(LOCKT,           enc_lockt,      dec_lockt),
  PROC(LOCKU,           enc_locku,      dec_locku),
  PROC(ACCESS,		enc_access,	dec_access),
  PROC(GETATTR,		enc_getattr,	dec_getattr),
  PROC(LOOKUP,		enc_lookup,	dec_lookup),
  PROC(LOOKUP_ROOT,	enc_lookup_root,	dec_lookup_root),
  PROC(REMOVE,		enc_remove,	dec_remove),
  PROC(RENAME,		enc_rename,	dec_rename),
  PROC(LINK,		enc_link,	dec_link),
  PROC(SYMLINK,		enc_symlink,	dec_symlink),
  PROC(CREATE,		enc_create,	dec_create),
  PROC(PATHCONF,	enc_pathconf,	dec_pathconf),
  PROC(STATFS,		enc_statfs,	dec_statfs),
  PROC(READLINK,	enc_readlink,	dec_readlink),
  PROC(READDIR,		enc_readdir,	dec_readdir),
  PROC(SERVER_CAPS,	enc_server_caps, dec_server_caps),
  PROC(DELEGRETURN,	enc_delegreturn, dec_delegreturn),
5928
  PROC(GETACL,		enc_getacl,	dec_getacl),
5929
  PROC(SETACL,		enc_setacl,	dec_setacl),
5930
  PROC(FS_LOCATIONS,	enc_fs_locations, dec_fs_locations),
5931
  PROC(RELEASE_LOCKOWNER, enc_release_lockowner, dec_release_lockowner),
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#if defined(CONFIG_NFS_V4_1)
  PROC(EXCHANGE_ID,	enc_exchange_id,	dec_exchange_id),
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  PROC(CREATE_SESSION,	enc_create_session,	dec_create_session),
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  PROC(DESTROY_SESSION,	enc_destroy_session,	dec_destroy_session),
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  PROC(SEQUENCE,	enc_sequence,	dec_sequence),
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  PROC(GET_LEASE_TIME,	enc_get_lease_time,	dec_get_lease_time),
5938
  PROC(RECLAIM_COMPLETE, enc_reclaim_complete,  dec_reclaim_complete),
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#endif /* CONFIG_NFS_V4_1 */
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};

struct rpc_version		nfs_version4 = {
	.number			= 4,
5944
	.nrprocs		= ARRAY_SIZE(nfs4_procedures),
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	.procs			= nfs4_procedures
};

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