nfs4xdr.c 167.5 KB
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/*
 *  fs/nfs/nfs4xdr.c
 *
 *  Client-side XDR for NFSv4.
 *
 *  Copyright (c) 2002 The Regents of the University of Michigan.
 *  All rights reserved.
 *
 *  Kendrick Smith <kmsmith@umich.edu>
 *  Andy Adamson   <andros@umich.edu>
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 *
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 *  Redistribution and use in source and binary forms, with or without
 *  modification, are permitted provided that the following conditions
 *  are met:
 *
 *  1. Redistributions of source code must retain the above copyright
 *     notice, this list of conditions and the following disclaimer.
 *  2. Redistributions in binary form must reproduce the above copyright
 *     notice, this list of conditions and the following disclaimer in the
 *     documentation and/or other materials provided with the distribution.
 *  3. Neither the name of the University nor the names of its
 *     contributors may be used to endorse or promote products derived
 *     from this software without specific prior written permission.
 *
 *  THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
 *  WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
 *  MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 *  DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
 *  FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 *  CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 *  SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
 *  BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
 *  LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
 *  NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 *  SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

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

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

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

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

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#define encode_exchange_id_maxsz (op_encode_hdr_maxsz + \
				encode_verifier_maxsz + \
				1 /* co_ownerid.len */ + \
				XDR_QUADLEN(NFS4_EXCHANGE_ID_LEN) + \
				1 /* flags */ + \
				1 /* spa_how */ + \
				0 /* SP4_NONE (for now) */ + \
				1 /* zero implemetation id array */)
#define decode_exchange_id_maxsz (op_decode_hdr_maxsz + \
				2 /* eir_clientid */ + \
				1 /* eir_sequenceid */ + \
				1 /* eir_flags */ + \
				1 /* spr_how */ + \
				0 /* SP4_NONE (for now) */ + \
				2 /* eir_server_owner.so_minor_id */ + \
				/* eir_server_owner.so_major_id<> */ \
				XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 + \
				/* eir_server_scope<> */ \
				XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 + \
				1 /* eir_server_impl_id array length */ + \
				0 /* ignored eir_server_impl_id contents */)
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#define encode_channel_attrs_maxsz  (6 + 1 /* ca_rdma_ird.len (0) */)
#define decode_channel_attrs_maxsz  (6 + \
				     1 /* ca_rdma_ird.len */ + \
				     1 /* ca_rdma_ird */)
#define encode_create_session_maxsz  (op_encode_hdr_maxsz + \
				     2 /* csa_clientid */ + \
				     1 /* csa_sequence */ + \
				     1 /* csa_flags */ + \
				     encode_channel_attrs_maxsz + \
				     encode_channel_attrs_maxsz + \
				     1 /* csa_cb_program */ + \
				     1 /* csa_sec_parms.len (1) */ + \
				     1 /* cb_secflavor (AUTH_SYS) */ + \
				     1 /* stamp */ + \
				     1 /* machinename.len */ + \
				     XDR_QUADLEN(NFS4_MAX_MACHINE_NAME_LEN) + \
				     1 /* uid */ + \
				     1 /* gid */ + \
				     1 /* gids.len (0) */)
#define decode_create_session_maxsz  (op_decode_hdr_maxsz +	\
				     XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \
				     1 /* csr_sequence */ + \
				     1 /* csr_flags */ + \
				     decode_channel_attrs_maxsz + \
				     decode_channel_attrs_maxsz)
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#define encode_destroy_session_maxsz    (op_encode_hdr_maxsz + 4)
#define decode_destroy_session_maxsz    (op_decode_hdr_maxsz)
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#define encode_sequence_maxsz	(op_encode_hdr_maxsz + \
				XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + 4)
#define decode_sequence_maxsz	(op_decode_hdr_maxsz + \
				XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + 5)
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#define encode_reclaim_complete_maxsz	(op_encode_hdr_maxsz + 4)
#define decode_reclaim_complete_maxsz	(op_decode_hdr_maxsz + 4)
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#define encode_getdeviceinfo_maxsz (op_encode_hdr_maxsz + 4 + \
				XDR_QUADLEN(NFS4_DEVICEID4_SIZE))
#define decode_getdeviceinfo_maxsz (op_decode_hdr_maxsz + \
				1 /* layout type */ + \
				1 /* opaque devaddr4 length */ + \
				  /* devaddr4 payload is read into page */ \
				1 /* notification bitmap length */ + \
				1 /* notification bitmap */)
#define encode_layoutget_maxsz	(op_encode_hdr_maxsz + 10 + \
				encode_stateid_maxsz)
#define decode_layoutget_maxsz	(op_decode_hdr_maxsz + 8 + \
				decode_stateid_maxsz + \
				XDR_QUADLEN(PNFS_LAYOUT_MAXSIZE))
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#else /* CONFIG_NFS_V4_1 */
#define encode_sequence_maxsz	0
#define decode_sequence_maxsz	0
#endif /* CONFIG_NFS_V4_1 */

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#define NFS4_enc_compound_sz	(1024)  /* XXX: large enough? */
#define NFS4_dec_compound_sz	(1024)  /* XXX: large enough? */
#define NFS4_enc_read_sz	(compound_encode_hdr_maxsz + \
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				encode_sequence_maxsz + \
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				encode_putfh_maxsz + \
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				encode_read_maxsz)
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#define NFS4_dec_read_sz	(compound_decode_hdr_maxsz + \
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				decode_sequence_maxsz + \
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				decode_putfh_maxsz + \
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				decode_read_maxsz)
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#define NFS4_enc_readlink_sz	(compound_encode_hdr_maxsz + \
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				encode_sequence_maxsz + \
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				encode_putfh_maxsz + \
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				encode_readlink_maxsz)
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#define NFS4_dec_readlink_sz	(compound_decode_hdr_maxsz + \
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				decode_sequence_maxsz + \
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				decode_putfh_maxsz + \
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				decode_readlink_maxsz)
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#define NFS4_enc_readdir_sz	(compound_encode_hdr_maxsz + \
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				encode_sequence_maxsz + \
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				encode_putfh_maxsz + \
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				encode_readdir_maxsz)
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#define NFS4_dec_readdir_sz	(compound_decode_hdr_maxsz + \
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				decode_sequence_maxsz + \
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				decode_putfh_maxsz + \
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				decode_readdir_maxsz)
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#define NFS4_enc_write_sz	(compound_encode_hdr_maxsz + \
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				encode_sequence_maxsz + \
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				encode_putfh_maxsz + \
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				encode_write_maxsz + \
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				encode_getattr_maxsz)
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#define NFS4_dec_write_sz	(compound_decode_hdr_maxsz + \
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				decode_sequence_maxsz + \
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				decode_putfh_maxsz + \
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				decode_write_maxsz + \
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				decode_getattr_maxsz)
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#define NFS4_enc_commit_sz	(compound_encode_hdr_maxsz + \
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				encode_sequence_maxsz + \
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				encode_putfh_maxsz + \
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				encode_commit_maxsz + \
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				encode_getattr_maxsz)
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#define NFS4_dec_commit_sz	(compound_decode_hdr_maxsz + \
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				decode_sequence_maxsz + \
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				decode_putfh_maxsz + \
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				decode_commit_maxsz + \
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				decode_getattr_maxsz)
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#define NFS4_enc_open_sz        (compound_encode_hdr_maxsz + \
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				encode_sequence_maxsz + \
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				encode_putfh_maxsz + \
				encode_savefh_maxsz + \
				encode_open_maxsz + \
				encode_getfh_maxsz + \
				encode_getattr_maxsz + \
				encode_restorefh_maxsz + \
				encode_getattr_maxsz)
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#define NFS4_dec_open_sz        (compound_decode_hdr_maxsz + \
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				decode_sequence_maxsz + \
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				decode_putfh_maxsz + \
				decode_savefh_maxsz + \
				decode_open_maxsz + \
				decode_getfh_maxsz + \
				decode_getattr_maxsz + \
				decode_restorefh_maxsz + \
				decode_getattr_maxsz)
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#define NFS4_enc_open_confirm_sz \
				(compound_encode_hdr_maxsz + \
				 encode_putfh_maxsz + \
				 encode_open_confirm_maxsz)
#define NFS4_dec_open_confirm_sz \
				(compound_decode_hdr_maxsz + \
				 decode_putfh_maxsz + \
				 decode_open_confirm_maxsz)
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#define NFS4_enc_open_noattr_sz	(compound_encode_hdr_maxsz + \
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					encode_sequence_maxsz + \
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					encode_putfh_maxsz + \
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					encode_open_maxsz + \
					encode_getattr_maxsz)
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#define NFS4_dec_open_noattr_sz	(compound_decode_hdr_maxsz + \
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					decode_sequence_maxsz + \
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					decode_putfh_maxsz + \
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					decode_open_maxsz + \
					decode_getattr_maxsz)
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#define NFS4_enc_open_downgrade_sz \
				(compound_encode_hdr_maxsz + \
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				 encode_sequence_maxsz + \
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				 encode_putfh_maxsz + \
				 encode_open_downgrade_maxsz + \
				 encode_getattr_maxsz)
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#define NFS4_dec_open_downgrade_sz \
				(compound_decode_hdr_maxsz + \
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				 decode_sequence_maxsz + \
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				 decode_putfh_maxsz + \
				 decode_open_downgrade_maxsz + \
				 decode_getattr_maxsz)
#define NFS4_enc_close_sz	(compound_encode_hdr_maxsz + \
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				 encode_sequence_maxsz + \
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				 encode_putfh_maxsz + \
				 encode_close_maxsz + \
				 encode_getattr_maxsz)
#define NFS4_dec_close_sz	(compound_decode_hdr_maxsz + \
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				 decode_sequence_maxsz + \
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				 decode_putfh_maxsz + \
				 decode_close_maxsz + \
				 decode_getattr_maxsz)
#define NFS4_enc_setattr_sz	(compound_encode_hdr_maxsz + \
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				 encode_sequence_maxsz + \
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				 encode_putfh_maxsz + \
				 encode_setattr_maxsz + \
				 encode_getattr_maxsz)
#define NFS4_dec_setattr_sz	(compound_decode_hdr_maxsz + \
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				 decode_sequence_maxsz + \
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				 decode_putfh_maxsz + \
				 decode_setattr_maxsz + \
				 decode_getattr_maxsz)
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#define NFS4_enc_fsinfo_sz	(compound_encode_hdr_maxsz + \
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				encode_sequence_maxsz + \
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				encode_putfh_maxsz + \
				encode_fsinfo_maxsz)
#define NFS4_dec_fsinfo_sz	(compound_decode_hdr_maxsz + \
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				decode_sequence_maxsz + \
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				decode_putfh_maxsz + \
				decode_fsinfo_maxsz)
#define NFS4_enc_renew_sz	(compound_encode_hdr_maxsz + \
				encode_renew_maxsz)
#define NFS4_dec_renew_sz	(compound_decode_hdr_maxsz + \
				decode_renew_maxsz)
#define NFS4_enc_setclientid_sz	(compound_encode_hdr_maxsz + \
				encode_setclientid_maxsz)
#define NFS4_dec_setclientid_sz	(compound_decode_hdr_maxsz + \
				decode_setclientid_maxsz)
#define NFS4_enc_setclientid_confirm_sz \
				(compound_encode_hdr_maxsz + \
				encode_setclientid_confirm_maxsz + \
				encode_putrootfh_maxsz + \
				encode_fsinfo_maxsz)
#define NFS4_dec_setclientid_confirm_sz \
				(compound_decode_hdr_maxsz + \
				decode_setclientid_confirm_maxsz + \
				decode_putrootfh_maxsz + \
				decode_fsinfo_maxsz)
#define NFS4_enc_lock_sz        (compound_encode_hdr_maxsz + \
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				encode_sequence_maxsz + \
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				encode_putfh_maxsz + \
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				encode_lock_maxsz)
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#define NFS4_dec_lock_sz        (compound_decode_hdr_maxsz + \
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				decode_sequence_maxsz + \
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				decode_putfh_maxsz + \
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				decode_lock_maxsz)
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#define NFS4_enc_lockt_sz       (compound_encode_hdr_maxsz + \
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				encode_sequence_maxsz + \
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				encode_putfh_maxsz + \
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				encode_lockt_maxsz)
#define NFS4_dec_lockt_sz       (compound_decode_hdr_maxsz + \
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				 decode_sequence_maxsz + \
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				 decode_putfh_maxsz + \
				 decode_lockt_maxsz)
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#define NFS4_enc_locku_sz       (compound_encode_hdr_maxsz + \
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				encode_sequence_maxsz + \
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				encode_putfh_maxsz + \
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				encode_locku_maxsz)
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#define NFS4_dec_locku_sz       (compound_decode_hdr_maxsz + \
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				decode_sequence_maxsz + \
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				decode_putfh_maxsz + \
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				decode_locku_maxsz)
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#define NFS4_enc_release_lockowner_sz \
				(compound_encode_hdr_maxsz + \
				 encode_lockowner_maxsz)
#define NFS4_dec_release_lockowner_sz \
				(compound_decode_hdr_maxsz + \
				 decode_lockowner_maxsz)
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#define NFS4_enc_access_sz	(compound_encode_hdr_maxsz + \
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				encode_sequence_maxsz + \
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				encode_putfh_maxsz + \
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				encode_access_maxsz + \
				encode_getattr_maxsz)
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#define NFS4_dec_access_sz	(compound_decode_hdr_maxsz + \
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				decode_sequence_maxsz + \
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				decode_putfh_maxsz + \
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				decode_access_maxsz + \
				decode_getattr_maxsz)
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#define NFS4_enc_getattr_sz	(compound_encode_hdr_maxsz + \
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				encode_sequence_maxsz + \
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				encode_putfh_maxsz + \
				encode_getattr_maxsz)
#define NFS4_dec_getattr_sz	(compound_decode_hdr_maxsz + \
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				decode_sequence_maxsz + \
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				decode_putfh_maxsz + \
				decode_getattr_maxsz)
#define NFS4_enc_lookup_sz	(compound_encode_hdr_maxsz + \
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				encode_sequence_maxsz + \
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				encode_putfh_maxsz + \
				encode_lookup_maxsz + \
				encode_getattr_maxsz + \
				encode_getfh_maxsz)
#define NFS4_dec_lookup_sz	(compound_decode_hdr_maxsz + \
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				decode_sequence_maxsz + \
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				decode_putfh_maxsz + \
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				decode_lookup_maxsz + \
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				decode_getattr_maxsz + \
				decode_getfh_maxsz)
#define NFS4_enc_lookup_root_sz (compound_encode_hdr_maxsz + \
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				encode_sequence_maxsz + \
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				encode_putrootfh_maxsz + \
				encode_getattr_maxsz + \
				encode_getfh_maxsz)
#define NFS4_dec_lookup_root_sz (compound_decode_hdr_maxsz + \
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				decode_sequence_maxsz + \
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				decode_putrootfh_maxsz + \
				decode_getattr_maxsz + \
				decode_getfh_maxsz)
#define NFS4_enc_remove_sz	(compound_encode_hdr_maxsz + \
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				encode_sequence_maxsz + \
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				encode_putfh_maxsz + \
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				encode_remove_maxsz + \
				encode_getattr_maxsz)
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#define NFS4_dec_remove_sz	(compound_decode_hdr_maxsz + \
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				decode_sequence_maxsz + \
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				decode_putfh_maxsz + \
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				decode_remove_maxsz + \
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				decode_getattr_maxsz)
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#define NFS4_enc_rename_sz	(compound_encode_hdr_maxsz + \
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				encode_sequence_maxsz + \
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				encode_putfh_maxsz + \
				encode_savefh_maxsz + \
				encode_putfh_maxsz + \
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				encode_rename_maxsz + \
				encode_getattr_maxsz + \
				encode_restorefh_maxsz + \
				encode_getattr_maxsz)
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#define NFS4_dec_rename_sz	(compound_decode_hdr_maxsz + \
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				decode_sequence_maxsz + \
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				decode_putfh_maxsz + \
				decode_savefh_maxsz + \
				decode_putfh_maxsz + \
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				decode_rename_maxsz + \
				decode_getattr_maxsz + \
				decode_restorefh_maxsz + \
				decode_getattr_maxsz)
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#define NFS4_enc_link_sz	(compound_encode_hdr_maxsz + \
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				encode_sequence_maxsz + \
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				encode_putfh_maxsz + \
				encode_savefh_maxsz + \
				encode_putfh_maxsz + \
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				encode_link_maxsz + \
				decode_getattr_maxsz + \
				encode_restorefh_maxsz + \
				decode_getattr_maxsz)
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#define NFS4_dec_link_sz	(compound_decode_hdr_maxsz + \
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				decode_sequence_maxsz + \
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				decode_putfh_maxsz + \
				decode_savefh_maxsz + \
				decode_putfh_maxsz + \
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				decode_link_maxsz + \
				decode_getattr_maxsz + \
				decode_restorefh_maxsz + \
				decode_getattr_maxsz)
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#define NFS4_enc_symlink_sz	(compound_encode_hdr_maxsz + \
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				encode_sequence_maxsz + \
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				encode_putfh_maxsz + \
				encode_symlink_maxsz + \
				encode_getattr_maxsz + \
				encode_getfh_maxsz)
#define NFS4_dec_symlink_sz	(compound_decode_hdr_maxsz + \
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				decode_sequence_maxsz + \
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				decode_putfh_maxsz + \
				decode_symlink_maxsz + \
				decode_getattr_maxsz + \
				decode_getfh_maxsz)
#define NFS4_enc_create_sz	(compound_encode_hdr_maxsz + \
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				encode_sequence_maxsz + \
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				encode_putfh_maxsz + \
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				encode_savefh_maxsz + \
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				encode_create_maxsz + \
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				encode_getfh_maxsz + \
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				encode_getattr_maxsz + \
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				encode_restorefh_maxsz + \
				encode_getattr_maxsz)
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#define NFS4_dec_create_sz	(compound_decode_hdr_maxsz + \
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				decode_sequence_maxsz + \
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				decode_putfh_maxsz + \
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				decode_savefh_maxsz + \
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				decode_create_maxsz + \
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				decode_getfh_maxsz + \
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				decode_getattr_maxsz + \
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				decode_restorefh_maxsz + \
				decode_getattr_maxsz)
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#define NFS4_enc_pathconf_sz	(compound_encode_hdr_maxsz + \
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				encode_sequence_maxsz + \
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				encode_putfh_maxsz + \
				encode_getattr_maxsz)
#define NFS4_dec_pathconf_sz	(compound_decode_hdr_maxsz + \
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				decode_sequence_maxsz + \
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				decode_putfh_maxsz + \
				decode_getattr_maxsz)
#define NFS4_enc_statfs_sz	(compound_encode_hdr_maxsz + \
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				encode_sequence_maxsz + \
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				encode_putfh_maxsz + \
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				encode_statfs_maxsz)
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#define NFS4_dec_statfs_sz	(compound_decode_hdr_maxsz + \
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				decode_sequence_maxsz + \
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				decode_putfh_maxsz + \
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				decode_statfs_maxsz)
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#define NFS4_enc_server_caps_sz (compound_encode_hdr_maxsz + \
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				encode_sequence_maxsz + \
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				encode_putfh_maxsz + \
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				encode_getattr_maxsz)
#define NFS4_dec_server_caps_sz (compound_decode_hdr_maxsz + \
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				decode_sequence_maxsz + \
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				decode_putfh_maxsz + \
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				decode_getattr_maxsz)
#define NFS4_enc_delegreturn_sz	(compound_encode_hdr_maxsz + \
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				encode_sequence_maxsz + \
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				encode_putfh_maxsz + \
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				encode_delegreturn_maxsz + \
				encode_getattr_maxsz)
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#define NFS4_dec_delegreturn_sz (compound_decode_hdr_maxsz + \
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				decode_sequence_maxsz + \
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				decode_delegreturn_maxsz + \
				decode_getattr_maxsz)
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#define NFS4_enc_getacl_sz	(compound_encode_hdr_maxsz + \
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				encode_sequence_maxsz + \
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				encode_putfh_maxsz + \
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				encode_getacl_maxsz)
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#define NFS4_dec_getacl_sz	(compound_decode_hdr_maxsz + \
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				decode_sequence_maxsz + \
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				decode_putfh_maxsz + \
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				decode_getacl_maxsz)
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#define NFS4_enc_setacl_sz	(compound_encode_hdr_maxsz + \
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				encode_sequence_maxsz + \
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				encode_putfh_maxsz + \
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				encode_setacl_maxsz)
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#define NFS4_dec_setacl_sz	(compound_decode_hdr_maxsz + \
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				decode_sequence_maxsz + \
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				decode_putfh_maxsz + \
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				decode_setacl_maxsz)
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#define NFS4_enc_fs_locations_sz \
				(compound_encode_hdr_maxsz + \
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				 encode_sequence_maxsz + \
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				 encode_putfh_maxsz + \
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				 encode_lookup_maxsz + \
				 encode_fs_locations_maxsz)
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#define NFS4_dec_fs_locations_sz \
				(compound_decode_hdr_maxsz + \
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				 decode_sequence_maxsz + \
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				 decode_putfh_maxsz + \
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				 decode_lookup_maxsz + \
				 decode_fs_locations_maxsz)
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#if defined(CONFIG_NFS_V4_1)
#define NFS4_enc_exchange_id_sz \
				(compound_encode_hdr_maxsz + \
				 encode_exchange_id_maxsz)
#define NFS4_dec_exchange_id_sz \
				(compound_decode_hdr_maxsz + \
				 decode_exchange_id_maxsz)
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#define NFS4_enc_create_session_sz \
				(compound_encode_hdr_maxsz + \
				 encode_create_session_maxsz)
#define NFS4_dec_create_session_sz \
				(compound_decode_hdr_maxsz + \
				 decode_create_session_maxsz)
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#define NFS4_enc_destroy_session_sz	(compound_encode_hdr_maxsz + \
					 encode_destroy_session_maxsz)
#define NFS4_dec_destroy_session_sz	(compound_decode_hdr_maxsz + \
					 decode_destroy_session_maxsz)
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#define NFS4_enc_sequence_sz \
				(compound_decode_hdr_maxsz + \
				 encode_sequence_maxsz)
#define NFS4_dec_sequence_sz \
				(compound_decode_hdr_maxsz + \
				 decode_sequence_maxsz)
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#define NFS4_enc_get_lease_time_sz	(compound_encode_hdr_maxsz + \
					 encode_sequence_maxsz + \
					 encode_putrootfh_maxsz + \
					 encode_fsinfo_maxsz)
#define NFS4_dec_get_lease_time_sz	(compound_decode_hdr_maxsz + \
					 decode_sequence_maxsz + \
					 decode_putrootfh_maxsz + \
					 decode_fsinfo_maxsz)
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#define NFS4_enc_reclaim_complete_sz	(compound_encode_hdr_maxsz + \
					 encode_sequence_maxsz + \
					 encode_reclaim_complete_maxsz)
#define NFS4_dec_reclaim_complete_sz	(compound_decode_hdr_maxsz + \
					 decode_sequence_maxsz + \
					 decode_reclaim_complete_maxsz)
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#define NFS4_enc_getdeviceinfo_sz (compound_encode_hdr_maxsz +    \
				encode_sequence_maxsz +\
				encode_getdeviceinfo_maxsz)
#define NFS4_dec_getdeviceinfo_sz (compound_decode_hdr_maxsz +    \
				decode_sequence_maxsz + \
				decode_getdeviceinfo_maxsz)
#define NFS4_enc_layoutget_sz	(compound_encode_hdr_maxsz + \
				encode_sequence_maxsz + \
				encode_putfh_maxsz +        \
				encode_layoutget_maxsz)
#define NFS4_dec_layoutget_sz	(compound_decode_hdr_maxsz + \
				decode_sequence_maxsz + \
				decode_putfh_maxsz +        \
				decode_layoutget_maxsz)
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const u32 nfs41_maxwrite_overhead = ((RPC_MAX_HEADER_WITH_AUTH +
				      compound_encode_hdr_maxsz +
				      encode_sequence_maxsz +
				      encode_putfh_maxsz +
				      encode_getattr_maxsz) *
				     XDR_UNIT);

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

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

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

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static void encode_compound_hdr(struct xdr_stream *xdr,
				struct rpc_rqst *req,
				struct compound_hdr *hdr)
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{
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	__be32 *p;
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	struct rpc_auth *auth = req->rq_cred->cr_auth;
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	/* initialize running count of expected bytes in reply.
	 * NOTE: the replied tag SHOULD be the same is the one sent,
	 * but this is not required as a MUST for the server to do so. */
	hdr->replen = RPC_REPHDRSIZE + auth->au_rslack + 3 + hdr->taglen;
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	dprintk("encode_compound: tag=%.*s\n", (int)hdr->taglen, hdr->tag);
	BUG_ON(hdr->taglen > NFS4_MAXTAGLEN);
798 799
	p = reserve_space(xdr, 4 + hdr->taglen + 8);
	p = xdr_encode_opaque(p, hdr->tag, hdr->taglen);
B
Benny Halevy 已提交
800
	*p++ = cpu_to_be32(hdr->minorversion);
801
	hdr->nops_p = p;
802
	*p = cpu_to_be32(hdr->nops);
803 804 805 806
}

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

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

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

820
static void encode_attrs(struct xdr_stream *xdr, const struct iattr *iap, const struct nfs_server *server)
L
Linus Torvalds 已提交
821 822 823 824 825
{
	char owner_name[IDMAP_NAMESZ];
	char owner_group[IDMAP_NAMESZ];
	int owner_namelen = 0;
	int owner_grouplen = 0;
A
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	__be32 *p;
	__be32 *q;
L
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828 829 830 831 832 833 834 835 836
	int len;
	uint32_t bmval0 = 0;
	uint32_t bmval1 = 0;

	/*
	 * We reserve enough space to write the entire attribute buffer at once.
	 * In the worst-case, this would be
	 *   12(bitmap) + 4(attrlen) + 8(size) + 4(mode) + 4(atime) + 4(mtime)
	 *          = 36 bytes, plus any contribution from variable-length fields
837
	 *            such as owner/group.
L
Linus Torvalds 已提交
838 839 840 841 842 843 844 845 846
	 */
	len = 16;

	/* Sigh */
	if (iap->ia_valid & ATTR_SIZE)
		len += 8;
	if (iap->ia_valid & ATTR_MODE)
		len += 4;
	if (iap->ia_valid & ATTR_UID) {
B
Bryan Schumaker 已提交
847
		owner_namelen = nfs_map_uid_to_name(server->nfs_client, iap->ia_uid, owner_name, IDMAP_NAMESZ);
L
Linus Torvalds 已提交
848
		if (owner_namelen < 0) {
849 850
			dprintk("nfs: couldn't resolve uid %d to string\n",
					iap->ia_uid);
L
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			/* XXX */
			strcpy(owner_name, "nobody");
			owner_namelen = sizeof("nobody") - 1;
			/* goto out; */
		}
		len += 4 + (XDR_QUADLEN(owner_namelen) << 2);
	}
	if (iap->ia_valid & ATTR_GID) {
B
Bryan Schumaker 已提交
859
		owner_grouplen = nfs_map_gid_to_group(server->nfs_client, iap->ia_gid, owner_group, IDMAP_NAMESZ);
L
Linus Torvalds 已提交
860
		if (owner_grouplen < 0) {
861 862
			dprintk("nfs: couldn't resolve gid %d to string\n",
					iap->ia_gid);
L
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863 864 865 866 867 868 869 870 871 872 873 874 875 876
			strcpy(owner_group, "nobody");
			owner_grouplen = sizeof("nobody") - 1;
			/* goto out; */
		}
		len += 4 + (XDR_QUADLEN(owner_grouplen) << 2);
	}
	if (iap->ia_valid & ATTR_ATIME_SET)
		len += 16;
	else if (iap->ia_valid & ATTR_ATIME)
		len += 4;
	if (iap->ia_valid & ATTR_MTIME_SET)
		len += 16;
	else if (iap->ia_valid & ATTR_MTIME)
		len += 4;
877
	p = reserve_space(xdr, len);
L
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	/*
	 * We write the bitmap length now, but leave the bitmap and the attribute
	 * buffer length to be backfilled at the end of this routine.
	 */
B
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883
	*p++ = cpu_to_be32(2);
L
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884 885 886 887 888
	q = p;
	p += 3;

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

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

/* out: */
}

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

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

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

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

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

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

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

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

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

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

	default:
		break;
	}

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

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

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

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

1021
static void encode_getattr_two(struct xdr_stream *xdr, uint32_t bm0, uint32_t bm1, struct compound_hdr *hdr)
L
Linus Torvalds 已提交
1022
{
A
Andy Adamson 已提交
1023
	__be32 *p;
L
Linus Torvalds 已提交
1024

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

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

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

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

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

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

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

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

T
Trond Myklebust 已提交
1073 1074 1075 1076 1077 1078 1079 1080 1081 1082 1083 1084 1085 1086
static inline int nfs4_lock_type(struct file_lock *fl, int block)
{
	if ((fl->fl_type & (F_RDLCK|F_WRLCK|F_UNLCK)) == F_RDLCK)
		return block ? NFS4_READW_LT : NFS4_READ_LT;
	return block ? NFS4_WRITEW_LT : NFS4_WRITE_LT;
}

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

1087 1088 1089 1090 1091 1092 1093 1094 1095 1096 1097
static void encode_lockowner(struct xdr_stream *xdr, const struct nfs_lowner *lowner)
{
	__be32 *p;

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

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

1106
	p = reserve_space(xdr, 32);
B
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1107 1108 1109
	*p++ = cpu_to_be32(OP_LOCK);
	*p++ = cpu_to_be32(nfs4_lock_type(args->fl, args->block));
	*p++ = cpu_to_be32(args->reclaim);
B
Benny Halevy 已提交
1110 1111
	p = xdr_encode_hyper(p, args->fl->fl_start);
	p = xdr_encode_hyper(p, nfs4_lock_length(args->fl));
1112
	*p = cpu_to_be32(args->new_lock_owner);
T
Trond Myklebust 已提交
1113
	if (args->new_lock_owner){
1114
		p = reserve_space(xdr, 4+NFS4_STATEID_SIZE+4);
B
Benny Halevy 已提交
1115
		*p++ = cpu_to_be32(args->open_seqid->sequence->counter);
B
Benny Halevy 已提交
1116
		p = xdr_encode_opaque_fixed(p, args->open_stateid->data, NFS4_STATEID_SIZE);
B
Benny Halevy 已提交
1117
		*p++ = cpu_to_be32(args->lock_seqid->sequence->counter);
1118
		encode_lockowner(xdr, &args->lock_owner);
L
Linus Torvalds 已提交
1119 1120
	}
	else {
1121
		p = reserve_space(xdr, NFS4_STATEID_SIZE+4);
B
Benny Halevy 已提交
1122
		p = xdr_encode_opaque_fixed(p, args->lock_stateid->data, NFS4_STATEID_SIZE);
1123
		*p = cpu_to_be32(args->lock_seqid->sequence->counter);
L
Linus Torvalds 已提交
1124
	}
1125
	hdr->nops++;
1126
	hdr->replen += decode_lock_maxsz;
L
Linus Torvalds 已提交
1127 1128
}

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

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

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

1147
	p = reserve_space(xdr, 12+NFS4_STATEID_SIZE+16);
B
Benny Halevy 已提交
1148 1149 1150
	*p++ = cpu_to_be32(OP_LOCKU);
	*p++ = cpu_to_be32(nfs4_lock_type(args->fl, 0));
	*p++ = cpu_to_be32(args->seqid->sequence->counter);
B
Benny Halevy 已提交
1151
	p = xdr_encode_opaque_fixed(p, args->stateid->data, NFS4_STATEID_SIZE);
B
Benny Halevy 已提交
1152
	p = xdr_encode_hyper(p, args->fl->fl_start);
1153
	xdr_encode_hyper(p, nfs4_lock_length(args->fl));
1154
	hdr->nops++;
1155
	hdr->replen += decode_locku_maxsz;
L
Linus Torvalds 已提交
1156 1157
}

1158 1159 1160 1161 1162 1163 1164 1165 1166 1167 1168
static void encode_release_lockowner(struct xdr_stream *xdr, const struct nfs_lowner *lowner, struct compound_hdr *hdr)
{
	__be32 *p;

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

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

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

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

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

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

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

1225
	p = reserve_space(xdr, 4);
L
Linus Torvalds 已提交
1226
	switch(arg->open_flags & O_EXCL) {
A
Andy Adamson 已提交
1227
	case 0:
1228
		*p = cpu_to_be32(NFS4_CREATE_UNCHECKED);
A
Andy Adamson 已提交
1229 1230 1231
		encode_attrs(xdr, arg->u.attrs, arg->server);
		break;
	default:
1232
		clp = arg->server->nfs_client;
1233
		if (clp->cl_mvops->minor_version > 0) {
1234 1235 1236 1237 1238 1239 1240 1241 1242 1243 1244 1245 1246 1247 1248
			if (nfs4_has_persistent_session(clp)) {
				*p = cpu_to_be32(NFS4_CREATE_GUARDED);
				encode_attrs(xdr, arg->u.attrs, arg->server);
			} else {
				struct iattr dummy;

				*p = cpu_to_be32(NFS4_CREATE_EXCLUSIVE4_1);
				encode_nfs4_verifier(xdr, &arg->u.verifier);
				dummy.ia_valid = 0;
				encode_attrs(xdr, &dummy, arg->server);
			}
		} else {
			*p = cpu_to_be32(NFS4_CREATE_EXCLUSIVE);
			encode_nfs4_verifier(xdr, &arg->u.verifier);
		}
L
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1249 1250 1251 1252 1253
	}
}

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

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

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

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

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

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

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

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

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

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

1316
static void encode_open(struct xdr_stream *xdr, const struct nfs_openargs *arg, struct compound_hdr *hdr)
L
Linus Torvalds 已提交
1317 1318 1319 1320
{
	encode_openhdr(xdr, arg);
	encode_opentype(xdr, arg);
	switch (arg->claim) {
A
Andy Adamson 已提交
1321 1322 1323 1324 1325 1326 1327 1328 1329 1330 1331
	case NFS4_OPEN_CLAIM_NULL:
		encode_claim_null(xdr, arg->name);
		break;
	case NFS4_OPEN_CLAIM_PREVIOUS:
		encode_claim_previous(xdr, arg->u.delegation_type);
		break;
	case NFS4_OPEN_CLAIM_DELEGATE_CUR:
		encode_claim_delegate_cur(xdr, arg->name, &arg->u.delegation);
		break;
	default:
		BUG();
L
Linus Torvalds 已提交
1332
	}
1333
	hdr->nops++;
1334
	hdr->replen += decode_open_maxsz;
L
Linus Torvalds 已提交
1335 1336
}

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

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

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

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

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

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

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

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

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

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

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

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

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

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

1414
static void encode_readdir(struct xdr_stream *xdr, const struct nfs4_readdir_arg *readdir, struct rpc_rqst *req, struct compound_hdr *hdr)
L
Linus Torvalds 已提交
1415
{
B
Bryan Schumaker 已提交
1416
	uint32_t attrs[2] = {0, 0};
1417
	uint32_t dircount = readdir->count >> 1;
A
Al Viro 已提交
1418
	__be32 *p;
L
Linus Torvalds 已提交
1419

B
Bryan Schumaker 已提交
1420 1421 1422 1423 1424 1425 1426
	if (readdir->plus) {
		attrs[0] |= FATTR4_WORD0_TYPE|FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE|
			FATTR4_WORD0_FSID|FATTR4_WORD0_FILEHANDLE;
		attrs[1] |= FATTR4_WORD1_MODE|FATTR4_WORD1_NUMLINKS|FATTR4_WORD1_OWNER|
			FATTR4_WORD1_OWNER_GROUP|FATTR4_WORD1_RAWDEV|
			FATTR4_WORD1_SPACE_USED|FATTR4_WORD1_TIME_ACCESS|
			FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
1427
		dircount >>= 1;
B
Bryan Schumaker 已提交
1428 1429 1430
	}
	attrs[0] |= FATTR4_WORD0_RDATTR_ERROR|FATTR4_WORD0_FILEID;
	attrs[1] |= FATTR4_WORD1_MOUNTED_ON_FILEID;
1431 1432 1433 1434 1435
	/* Switch to mounted_on_fileid if the server supports it */
	if (readdir->bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)
		attrs[0] &= ~FATTR4_WORD0_FILEID;
	else
		attrs[1] &= ~FATTR4_WORD1_MOUNTED_ON_FILEID;
B
Bryan Schumaker 已提交
1436

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

B
Benny Halevy 已提交
1445
	*p++ = cpu_to_be32(attrs[0] & readdir->bitmask[0]);
1446
	*p = cpu_to_be32(attrs[1] & readdir->bitmask[1]);
1447
	hdr->nops++;
1448
	hdr->replen += decode_readdir_maxsz;
1449 1450
	dprintk("%s: cookie = %Lu, verifier = %08x:%08x, bitmap = %08x:%08x\n",
			__func__,
1451 1452 1453 1454 1455
			(unsigned long long)readdir->cookie,
			((u32 *)readdir->verifier.data)[0],
			((u32 *)readdir->verifier.data)[1],
			attrs[0] & readdir->bitmask[0],
			attrs[1] & readdir->bitmask[1]);
L
Linus Torvalds 已提交
1456 1457
}

1458
static void encode_readlink(struct xdr_stream *xdr, const struct nfs4_readlink *readlink, struct rpc_rqst *req, struct compound_hdr *hdr)
L
Linus Torvalds 已提交
1459
{
A
Al Viro 已提交
1460
	__be32 *p;
L
Linus Torvalds 已提交
1461

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

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

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

1479
static void encode_rename(struct xdr_stream *xdr, const struct qstr *oldname, const struct qstr *newname, struct compound_hdr *hdr)
L
Linus Torvalds 已提交
1480
{
A
Al Viro 已提交
1481
	__be32 *p;
L
Linus Torvalds 已提交
1482

1483 1484 1485 1486
	p = reserve_space(xdr, 4);
	*p = cpu_to_be32(OP_RENAME);
	encode_string(xdr, oldname->len, oldname->name);
	encode_string(xdr, newname->len, newname->name);
1487
	hdr->nops++;
1488
	hdr->replen += decode_rename_maxsz;
L
Linus Torvalds 已提交
1489 1490
}

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

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

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

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

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

1518
	p = reserve_space(xdr, 4+NFS4_STATEID_SIZE);
B
Benny Halevy 已提交
1519
	*p++ = cpu_to_be32(OP_SETATTR);
1520
	xdr_encode_opaque_fixed(p, zero_stateid.data, NFS4_STATEID_SIZE);
1521
	p = reserve_space(xdr, 2*4);
B
Benny Halevy 已提交
1522
	*p++ = cpu_to_be32(1);
1523
	*p = cpu_to_be32(FATTR4_WORD0_ACL);
1524 1525
	if (arg->acl_len % 4)
		return -EINVAL;
1526
	p = reserve_space(xdr, 4);
1527
	*p = cpu_to_be32(arg->acl_len);
1528
	xdr_write_pages(xdr, arg->acl_pages, arg->acl_pgbase, arg->acl_len);
1529
	hdr->nops++;
1530
	hdr->replen += decode_setacl_maxsz;
1531 1532 1533
	return 0;
}

1534
static void
1535
encode_savefh(struct xdr_stream *xdr, struct compound_hdr *hdr)
L
Linus Torvalds 已提交
1536
{
A
Al Viro 已提交
1537
	__be32 *p;
L
Linus Torvalds 已提交
1538

1539
	p = reserve_space(xdr, 4);
1540
	*p = cpu_to_be32(OP_SAVEFH);
1541
	hdr->nops++;
1542
	hdr->replen += decode_savefh_maxsz;
L
Linus Torvalds 已提交
1543 1544
}

1545
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
1546
{
A
Al Viro 已提交
1547
	__be32 *p;
1548

1549
	p = reserve_space(xdr, 4+NFS4_STATEID_SIZE);
B
Benny Halevy 已提交
1550
	*p++ = cpu_to_be32(OP_SETATTR);
1551
	xdr_encode_opaque_fixed(p, arg->stateid.data, NFS4_STATEID_SIZE);
1552
	hdr->nops++;
1553
	hdr->replen += decode_setattr_maxsz;
1554
	encode_attrs(xdr, arg->iap, server);
L
Linus Torvalds 已提交
1555 1556
}

1557
static void encode_setclientid(struct xdr_stream *xdr, const struct nfs4_setclientid *setclientid, struct compound_hdr *hdr)
L
Linus Torvalds 已提交
1558
{
A
Al Viro 已提交
1559
	__be32 *p;
L
Linus Torvalds 已提交
1560

1561
	p = reserve_space(xdr, 4 + NFS4_VERIFIER_SIZE);
B
Benny Halevy 已提交
1562
	*p++ = cpu_to_be32(OP_SETCLIENTID);
1563
	xdr_encode_opaque_fixed(p, setclientid->sc_verifier->data, NFS4_VERIFIER_SIZE);
L
Linus Torvalds 已提交
1564 1565

	encode_string(xdr, setclientid->sc_name_len, setclientid->sc_name);
1566
	p = reserve_space(xdr, 4);
1567
	*p = cpu_to_be32(setclientid->sc_prog);
L
Linus Torvalds 已提交
1568 1569
	encode_string(xdr, setclientid->sc_netid_len, setclientid->sc_netid);
	encode_string(xdr, setclientid->sc_uaddr_len, setclientid->sc_uaddr);
1570
	p = reserve_space(xdr, 4);
1571
	*p = cpu_to_be32(setclientid->sc_cb_ident);
1572
	hdr->nops++;
1573
	hdr->replen += decode_setclientid_maxsz;
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}

1576
static void encode_setclientid_confirm(struct xdr_stream *xdr, const struct nfs4_setclientid_res *arg, struct compound_hdr *hdr)
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{
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	__be32 *p;
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1580
	p = reserve_space(xdr, 12 + NFS4_VERIFIER_SIZE);
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	*p++ = cpu_to_be32(OP_SETCLIENTID_CONFIRM);
1582 1583
	p = xdr_encode_hyper(p, arg->clientid);
	xdr_encode_opaque_fixed(p, arg->confirm.data, NFS4_VERIFIER_SIZE);
1584
	hdr->nops++;
1585
	hdr->replen += decode_setclientid_confirm_maxsz;
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}

1588
static void encode_write(struct xdr_stream *xdr, const struct nfs_writeargs *args, struct compound_hdr *hdr)
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{
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	__be32 *p;
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1592
	p = reserve_space(xdr, 4);
1593
	*p = cpu_to_be32(OP_WRITE);
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1595
	encode_stateid(xdr, args->context, args->lock_context);
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1597
	p = reserve_space(xdr, 16);
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	p = xdr_encode_hyper(p, args->offset);
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	*p++ = cpu_to_be32(args->stable);
1600
	*p = cpu_to_be32(args->count);
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	xdr_write_pages(xdr, args->pages, args->pgbase, args->count);
1603
	hdr->nops++;
1604
	hdr->replen += decode_write_maxsz;
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}

1607
static void encode_delegreturn(struct xdr_stream *xdr, const nfs4_stateid *stateid, struct compound_hdr *hdr)
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{
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	__be32 *p;
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1611
	p = reserve_space(xdr, 4+NFS4_STATEID_SIZE);
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	*p++ = cpu_to_be32(OP_DELEGRETURN);
1614
	xdr_encode_opaque_fixed(p, stateid->data, NFS4_STATEID_SIZE);
1615
	hdr->nops++;
1616
	hdr->replen += decode_delegreturn_maxsz;
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}
1618

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#if defined(CONFIG_NFS_V4_1)
1620
/* 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;

1627
	p = reserve_space(xdr, 4 + sizeof(args->verifier->data));
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	*p++ = cpu_to_be32(OP_EXCHANGE_ID);
1629
	xdr_encode_opaque_fixed(p, args->verifier->data, sizeof(args->verifier->data));
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	encode_string(xdr, args->id_len, args->id);

1633
	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 */
1636
	*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;
1649 1650 1651 1652 1653 1654 1655 1656
	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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1658 1659
	len = scnprintf(machine_name, sizeof(machine_name), "%s",
			clp->cl_ipaddr);
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1661
	p = reserve_space(xdr, 20 + 2*28 + 20 + len + 12);
1662
	*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 */
1671
	*p++ = cpu_to_be32(max_resp_sz_cached);		/* Max resp sz cached */
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	*p++ = cpu_to_be32(args->fc_attrs.max_ops);	/* max operations */
	*p++ = cpu_to_be32(args->fc_attrs.max_reqs);	/* max requests */
	*p++ = cpu_to_be32(0);				/* rdmachannel_attrs */
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	/* Back Channel */
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	*p++ = cpu_to_be32(args->fc_attrs.headerpadsz);	/* header padding size */
	*p++ = cpu_to_be32(args->bc_attrs.max_rqst_sz);	/* max req size */
	*p++ = cpu_to_be32(args->bc_attrs.max_resp_sz);	/* max resp size */
	*p++ = cpu_to_be32(args->bc_attrs.max_resp_sz_cached);	/* Max resp sz cached */
	*p++ = cpu_to_be32(args->bc_attrs.max_ops);	/* max operations */
	*p++ = cpu_to_be32(args->bc_attrs.max_reqs);	/* max requests */
	*p++ = cpu_to_be32(0);				/* rdmachannel_attrs */
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	*p++ = cpu_to_be32(args->cb_program);		/* cb_program */
	*p++ = cpu_to_be32(1);
	*p++ = cpu_to_be32(RPC_AUTH_UNIX);			/* auth_sys */
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	/* authsys_parms rfc1831 */
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	*p++ = cpu_to_be32((u32)clp->cl_boot_time.tv_nsec);	/* stamp */
1691
	p = xdr_encode_opaque(p, machine_name, len);
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	*p++ = cpu_to_be32(0);				/* UID */
	*p++ = cpu_to_be32(0);				/* GID */
1694
	*p = cpu_to_be32(0);				/* No more gids */
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1695 1696 1697
	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;
1704
	p = reserve_space(xdr, 4 + NFS4_MAX_SESSIONID_LEN);
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	*p++ = cpu_to_be32(OP_DESTROY_SESSION);
1706
	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;
}
1710 1711 1712 1713 1714 1715 1716 1717 1718 1719 1720 1721 1722

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 */

1725 1726 1727 1728 1729 1730
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;
1734 1735 1736 1737

	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;

1743
	p = reserve_space(xdr, 4 + NFS4_MAX_SESSIONID_LEN + 16);
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1744
	*p++ = cpu_to_be32(OP_SEQUENCE);
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1745 1746 1747 1748 1749 1750 1751 1752 1753 1754 1755 1756 1757

	/*
	 * 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);
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1758
	p = xdr_encode_opaque_fixed(p, session->sess_id.data, NFS4_MAX_SESSIONID_LEN);
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1759 1760 1761
	*p++ = cpu_to_be32(slot->seq_nr);
	*p++ = cpu_to_be32(args->sa_slotid);
	*p++ = cpu_to_be32(tp->highest_used_slotid);
1762
	*p = cpu_to_be32(args->sa_cache_this);
1763 1764 1765 1766 1767
	hdr->nops++;
	hdr->replen += decode_sequence_maxsz;
#endif /* CONFIG_NFS_V4_1 */
}

1768 1769 1770 1771 1772 1773 1774 1775 1776 1777 1778 1779 1780 1781 1782 1783 1784 1785 1786 1787 1788 1789 1790 1791 1792 1793 1794 1795 1796 1797 1798 1799 1800 1801 1802 1803 1804 1805 1806 1807 1808 1809 1810 1811 1812 1813 1814 1815 1816 1817 1818 1819
#ifdef CONFIG_NFS_V4_1
static void
encode_getdeviceinfo(struct xdr_stream *xdr,
		     const struct nfs4_getdeviceinfo_args *args,
		     struct compound_hdr *hdr)
{
	__be32 *p;

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

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

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

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

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

1824 1825 1826 1827
static u32 nfs4_xdr_minorversion(const struct nfs4_sequence_args *args)
{
#if defined(CONFIG_NFS_V4_1)
	if (args->sa_session)
1828
		return args->sa_session->clp->cl_mvops->minor_version;
1829 1830 1831 1832
#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 = {
1840
		.minorversion = nfs4_xdr_minorversion(&args->seq_args),
L
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1841 1842 1843
	};

	xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1844
	encode_compound_hdr(&xdr, req, &hdr);
1845
	encode_sequence(&xdr, &args->seq_args, &hdr);
1846 1847 1848
	encode_putfh(&xdr, args->fh, &hdr);
	encode_access(&xdr, args->access, &hdr);
	encode_getfattr(&xdr, args->bitmask, &hdr);
1849
	encode_nops(&hdr);
1850
	return 0;
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1851 1852 1853 1854 1855
}

/*
 * 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 = {
1860
		.minorversion = nfs4_xdr_minorversion(&args->seq_args),
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	};

	xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1864
	encode_compound_hdr(&xdr, req, &hdr);
1865
	encode_sequence(&xdr, &args->seq_args, &hdr);
1866 1867 1868 1869
	encode_putfh(&xdr, args->dir_fh, &hdr);
	encode_lookup(&xdr, args->name, &hdr);
	encode_getfh(&xdr, &hdr);
	encode_getfattr(&xdr, args->bitmask, &hdr);
1870
	encode_nops(&hdr);
1871
	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 = {
1881
		.minorversion = nfs4_xdr_minorversion(&args->seq_args),
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	};

	xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1885
	encode_compound_hdr(&xdr, req, &hdr);
1886
	encode_sequence(&xdr, &args->seq_args, &hdr);
1887 1888 1889
	encode_putrootfh(&xdr, &hdr);
	encode_getfh(&xdr, &hdr);
	encode_getfattr(&xdr, args->bitmask, &hdr);
1890
	encode_nops(&hdr);
1891
	return 0;
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}

/*
 * Encode REMOVE request
 */
1897
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 = {
1901
		.minorversion = nfs4_xdr_minorversion(&args->seq_args),
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	};

	xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1905
	encode_compound_hdr(&xdr, req, &hdr);
1906
	encode_sequence(&xdr, &args->seq_args, &hdr);
1907 1908 1909
	encode_putfh(&xdr, args->fh, &hdr);
	encode_remove(&xdr, &args->name, &hdr);
	encode_getfattr(&xdr, args->bitmask, &hdr);
1910
	encode_nops(&hdr);
1911
	return 0;
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}

/*
 * Encode RENAME request
 */
1917
static int nfs4_xdr_enc_rename(struct rpc_rqst *req, __be32 *p, const struct nfs_renameargs *args)
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{
	struct xdr_stream xdr;
	struct compound_hdr hdr = {
1921
		.minorversion = nfs4_xdr_minorversion(&args->seq_args),
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	};

	xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1925
	encode_compound_hdr(&xdr, req, &hdr);
1926
	encode_sequence(&xdr, &args->seq_args, &hdr);
1927 1928 1929 1930 1931 1932 1933
	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);
1934
	encode_nops(&hdr);
1935
	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 = {
1945
		.minorversion = nfs4_xdr_minorversion(&args->seq_args),
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	};

	xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1949
	encode_compound_hdr(&xdr, req, &hdr);
1950
	encode_sequence(&xdr, &args->seq_args, &hdr);
1951 1952 1953 1954 1955 1956 1957
	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);
1958
	encode_nops(&hdr);
1959
	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 = {
1969
		.minorversion = nfs4_xdr_minorversion(&args->seq_args),
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	};

	xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1973
	encode_compound_hdr(&xdr, req, &hdr);
1974
	encode_sequence(&xdr, &args->seq_args, &hdr);
1975 1976 1977 1978 1979 1980 1981
	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);
1982
	encode_nops(&hdr);
1983
	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 = {
2001
		.minorversion = nfs4_xdr_minorversion(&args->seq_args),
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	};

	xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2005
	encode_compound_hdr(&xdr, req, &hdr);
2006
	encode_sequence(&xdr, &args->seq_args, &hdr);
2007 2008
	encode_putfh(&xdr, args->fh, &hdr);
	encode_getfattr(&xdr, args->bitmask, &hdr);
2009
	encode_nops(&hdr);
2010
	return 0;
L
Linus Torvalds 已提交
2011 2012 2013 2014 2015
}

/*
 * Encode a CLOSE request
 */
A
Al Viro 已提交
2016
static int nfs4_xdr_enc_close(struct rpc_rqst *req, __be32 *p, struct nfs_closeargs *args)
L
Linus Torvalds 已提交
2017
{
A
Andy Adamson 已提交
2018 2019
	struct xdr_stream xdr;
	struct compound_hdr hdr = {
2020
		.minorversion = nfs4_xdr_minorversion(&args->seq_args),
A
Andy Adamson 已提交
2021 2022 2023
	};

	xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2024
	encode_compound_hdr(&xdr, req, &hdr);
2025
	encode_sequence(&xdr, &args->seq_args, &hdr);
2026 2027 2028
	encode_putfh(&xdr, args->fh, &hdr);
	encode_close(&xdr, args, &hdr);
	encode_getfattr(&xdr, args->bitmask, &hdr);
2029
	encode_nops(&hdr);
2030
	return 0;
L
Linus Torvalds 已提交
2031 2032 2033 2034 2035
}

/*
 * Encode an OPEN request
 */
A
Al Viro 已提交
2036
static int nfs4_xdr_enc_open(struct rpc_rqst *req, __be32 *p, struct nfs_openargs *args)
L
Linus Torvalds 已提交
2037 2038 2039
{
	struct xdr_stream xdr;
	struct compound_hdr hdr = {
2040
		.minorversion = nfs4_xdr_minorversion(&args->seq_args),
L
Linus Torvalds 已提交
2041 2042 2043
	};

	xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2044
	encode_compound_hdr(&xdr, req, &hdr);
2045
	encode_sequence(&xdr, &args->seq_args, &hdr);
2046 2047 2048 2049 2050 2051 2052
	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);
2053
	encode_nops(&hdr);
2054
	return 0;
L
Linus Torvalds 已提交
2055 2056 2057 2058 2059
}

/*
 * Encode an OPEN_CONFIRM request
 */
A
Al Viro 已提交
2060
static int nfs4_xdr_enc_open_confirm(struct rpc_rqst *req, __be32 *p, struct nfs_open_confirmargs *args)
L
Linus Torvalds 已提交
2061 2062 2063
{
	struct xdr_stream xdr;
	struct compound_hdr hdr = {
2064
		.nops   = 0,
L
Linus Torvalds 已提交
2065 2066 2067
	};

	xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2068
	encode_compound_hdr(&xdr, req, &hdr);
2069 2070
	encode_putfh(&xdr, args->fh, &hdr);
	encode_open_confirm(&xdr, args, &hdr);
2071
	encode_nops(&hdr);
2072
	return 0;
L
Linus Torvalds 已提交
2073 2074 2075 2076 2077
}

/*
 * Encode an OPEN request with no attributes.
 */
A
Al Viro 已提交
2078
static int nfs4_xdr_enc_open_noattr(struct rpc_rqst *req, __be32 *p, struct nfs_openargs *args)
L
Linus Torvalds 已提交
2079 2080 2081
{
	struct xdr_stream xdr;
	struct compound_hdr hdr = {
2082
		.minorversion = nfs4_xdr_minorversion(&args->seq_args),
L
Linus Torvalds 已提交
2083 2084 2085
	};

	xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2086
	encode_compound_hdr(&xdr, req, &hdr);
2087
	encode_sequence(&xdr, &args->seq_args, &hdr);
2088 2089 2090
	encode_putfh(&xdr, args->fh, &hdr);
	encode_open(&xdr, args, &hdr);
	encode_getfattr(&xdr, args->bitmask, &hdr);
2091
	encode_nops(&hdr);
2092
	return 0;
L
Linus Torvalds 已提交
2093 2094 2095 2096 2097
}

/*
 * Encode an OPEN_DOWNGRADE request
 */
A
Al Viro 已提交
2098
static int nfs4_xdr_enc_open_downgrade(struct rpc_rqst *req, __be32 *p, struct nfs_closeargs *args)
L
Linus Torvalds 已提交
2099 2100 2101
{
	struct xdr_stream xdr;
	struct compound_hdr hdr = {
2102
		.minorversion = nfs4_xdr_minorversion(&args->seq_args),
L
Linus Torvalds 已提交
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 2110
	encode_putfh(&xdr, args->fh, &hdr);
	encode_open_downgrade(&xdr, args, &hdr);
	encode_getfattr(&xdr, args->bitmask, &hdr);
2111
	encode_nops(&hdr);
2112
	return 0;
L
Linus Torvalds 已提交
2113 2114 2115 2116 2117
}

/*
 * Encode a LOCK request
 */
A
Al Viro 已提交
2118
static int nfs4_xdr_enc_lock(struct rpc_rqst *req, __be32 *p, struct nfs_lock_args *args)
L
Linus Torvalds 已提交
2119 2120 2121
{
	struct xdr_stream xdr;
	struct compound_hdr hdr = {
2122
		.minorversion = nfs4_xdr_minorversion(&args->seq_args),
L
Linus Torvalds 已提交
2123 2124 2125
	};

	xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2126
	encode_compound_hdr(&xdr, req, &hdr);
2127
	encode_sequence(&xdr, &args->seq_args, &hdr);
2128 2129
	encode_putfh(&xdr, args->fh, &hdr);
	encode_lock(&xdr, args, &hdr);
2130
	encode_nops(&hdr);
2131
	return 0;
L
Linus Torvalds 已提交
2132 2133 2134 2135 2136
}

/*
 * Encode a LOCKT request
 */
A
Al Viro 已提交
2137
static int nfs4_xdr_enc_lockt(struct rpc_rqst *req, __be32 *p, struct nfs_lockt_args *args)
L
Linus Torvalds 已提交
2138 2139 2140
{
	struct xdr_stream xdr;
	struct compound_hdr hdr = {
2141
		.minorversion = nfs4_xdr_minorversion(&args->seq_args),
L
Linus Torvalds 已提交
2142 2143 2144
	};

	xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2145
	encode_compound_hdr(&xdr, req, &hdr);
2146
	encode_sequence(&xdr, &args->seq_args, &hdr);
2147 2148
	encode_putfh(&xdr, args->fh, &hdr);
	encode_lockt(&xdr, args, &hdr);
2149
	encode_nops(&hdr);
2150
	return 0;
L
Linus Torvalds 已提交
2151 2152 2153 2154 2155
}

/*
 * Encode a LOCKU request
 */
A
Al Viro 已提交
2156
static int nfs4_xdr_enc_locku(struct rpc_rqst *req, __be32 *p, struct nfs_locku_args *args)
L
Linus Torvalds 已提交
2157 2158 2159
{
	struct xdr_stream xdr;
	struct compound_hdr hdr = {
2160
		.minorversion = nfs4_xdr_minorversion(&args->seq_args),
L
Linus Torvalds 已提交
2161 2162 2163
	};

	xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2164
	encode_compound_hdr(&xdr, req, &hdr);
2165
	encode_sequence(&xdr, &args->seq_args, &hdr);
2166 2167
	encode_putfh(&xdr, args->fh, &hdr);
	encode_locku(&xdr, args, &hdr);
2168
	encode_nops(&hdr);
2169
	return 0;
L
Linus Torvalds 已提交
2170 2171
}

2172 2173 2174 2175 2176 2177 2178 2179 2180 2181 2182 2183 2184 2185
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;
}

L
Linus Torvalds 已提交
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/*
 * Encode a READLINK request
 */
A
Al Viro 已提交
2189
static int nfs4_xdr_enc_readlink(struct rpc_rqst *req, __be32 *p, const struct nfs4_readlink *args)
L
Linus Torvalds 已提交
2190 2191 2192
{
	struct xdr_stream xdr;
	struct compound_hdr hdr = {
2193
		.minorversion = nfs4_xdr_minorversion(&args->seq_args),
L
Linus Torvalds 已提交
2194 2195 2196
	};

	xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2197
	encode_compound_hdr(&xdr, req, &hdr);
2198
	encode_sequence(&xdr, &args->seq_args, &hdr);
2199 2200
	encode_putfh(&xdr, args->fh, &hdr);
	encode_readlink(&xdr, args, req, &hdr);
2201

2202
	xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2, args->pages,
2203
			args->pgbase, args->pglen);
2204
	encode_nops(&hdr);
2205
	return 0;
L
Linus Torvalds 已提交
2206 2207 2208 2209 2210
}

/*
 * Encode a READDIR request
 */
A
Al Viro 已提交
2211
static int nfs4_xdr_enc_readdir(struct rpc_rqst *req, __be32 *p, const struct nfs4_readdir_arg *args)
L
Linus Torvalds 已提交
2212 2213 2214
{
	struct xdr_stream xdr;
	struct compound_hdr hdr = {
2215
		.minorversion = nfs4_xdr_minorversion(&args->seq_args),
L
Linus Torvalds 已提交
2216 2217 2218
	};

	xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2219
	encode_compound_hdr(&xdr, req, &hdr);
2220
	encode_sequence(&xdr, &args->seq_args, &hdr);
2221 2222
	encode_putfh(&xdr, args->fh, &hdr);
	encode_readdir(&xdr, args, req, &hdr);
2223

2224
	xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2, args->pages,
2225 2226
			 args->pgbase, args->count);
	dprintk("%s: inlined page args = (%u, %p, %u, %u)\n",
2227
			__func__, hdr.replen << 2, args->pages,
2228
			args->pgbase, args->count);
2229
	encode_nops(&hdr);
2230
	return 0;
L
Linus Torvalds 已提交
2231 2232 2233 2234 2235
}

/*
 * Encode a READ request
 */
A
Al Viro 已提交
2236
static int nfs4_xdr_enc_read(struct rpc_rqst *req, __be32 *p, struct nfs_readargs *args)
L
Linus Torvalds 已提交
2237 2238 2239
{
	struct xdr_stream xdr;
	struct compound_hdr hdr = {
2240
		.minorversion = nfs4_xdr_minorversion(&args->seq_args),
L
Linus Torvalds 已提交
2241 2242 2243
	};

	xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2244
	encode_compound_hdr(&xdr, req, &hdr);
2245
	encode_sequence(&xdr, &args->seq_args, &hdr);
2246 2247
	encode_putfh(&xdr, args->fh, &hdr);
	encode_read(&xdr, args, &hdr);
L
Linus Torvalds 已提交
2248

2249
	xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2,
L
Linus Torvalds 已提交
2250
			 args->pages, args->pgbase, args->count);
2251
	req->rq_rcv_buf.flags |= XDRBUF_READ;
2252
	encode_nops(&hdr);
2253
	return 0;
L
Linus Torvalds 已提交
2254 2255 2256 2257 2258
}

/*
 * Encode an SETATTR request
 */
A
Al Viro 已提交
2259
static int nfs4_xdr_enc_setattr(struct rpc_rqst *req, __be32 *p, struct nfs_setattrargs *args)
L
Linus Torvalds 已提交
2260
{
A
Andy Adamson 已提交
2261 2262
	struct xdr_stream xdr;
	struct compound_hdr hdr = {
2263
		.minorversion = nfs4_xdr_minorversion(&args->seq_args),
A
Andy Adamson 已提交
2264 2265 2266
	};

	xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2267
	encode_compound_hdr(&xdr, req, &hdr);
2268
	encode_sequence(&xdr, &args->seq_args, &hdr);
2269 2270 2271
	encode_putfh(&xdr, args->fh, &hdr);
	encode_setattr(&xdr, args, args->server, &hdr);
	encode_getfattr(&xdr, args->bitmask, &hdr);
2272
	encode_nops(&hdr);
2273
	return 0;
L
Linus Torvalds 已提交
2274 2275
}

2276 2277 2278 2279
/*
 * Encode a GETACL request
 */
static int
A
Al Viro 已提交
2280
nfs4_xdr_enc_getacl(struct rpc_rqst *req, __be32 *p,
2281 2282 2283 2284
		struct nfs_getaclargs *args)
{
	struct xdr_stream xdr;
	struct compound_hdr hdr = {
2285
		.minorversion = nfs4_xdr_minorversion(&args->seq_args),
2286
	};
2287
	uint32_t replen;
2288 2289

	xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2290
	encode_compound_hdr(&xdr, req, &hdr);
2291
	encode_sequence(&xdr, &args->seq_args, &hdr);
2292
	encode_putfh(&xdr, args->fh, &hdr);
2293
	replen = hdr.replen + op_decode_hdr_maxsz + nfs4_fattr_bitmap_maxsz + 1;
2294 2295
	encode_getattr_two(&xdr, FATTR4_WORD0_ACL, 0, &hdr);

2296
	xdr_inline_pages(&req->rq_rcv_buf, replen << 2,
2297
		args->acl_pages, args->acl_pgbase, args->acl_len);
2298
	encode_nops(&hdr);
2299
	return 0;
2300 2301
}

L
Linus Torvalds 已提交
2302 2303 2304
/*
 * Encode a WRITE request
 */
A
Al Viro 已提交
2305
static int nfs4_xdr_enc_write(struct rpc_rqst *req, __be32 *p, struct nfs_writeargs *args)
L
Linus Torvalds 已提交
2306 2307 2308
{
	struct xdr_stream xdr;
	struct compound_hdr hdr = {
2309
		.minorversion = nfs4_xdr_minorversion(&args->seq_args),
L
Linus Torvalds 已提交
2310 2311 2312
	};

	xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2313
	encode_compound_hdr(&xdr, req, &hdr);
2314
	encode_sequence(&xdr, &args->seq_args, &hdr);
2315 2316
	encode_putfh(&xdr, args->fh, &hdr);
	encode_write(&xdr, args, &hdr);
2317
	req->rq_snd_buf.flags |= XDRBUF_WRITE;
2318
	encode_getfattr(&xdr, args->bitmask, &hdr);
2319
	encode_nops(&hdr);
2320
	return 0;
L
Linus Torvalds 已提交
2321 2322 2323 2324 2325
}

/*
 *  a COMMIT request
 */
A
Al Viro 已提交
2326
static int nfs4_xdr_enc_commit(struct rpc_rqst *req, __be32 *p, struct nfs_writeargs *args)
L
Linus Torvalds 已提交
2327 2328 2329
{
	struct xdr_stream xdr;
	struct compound_hdr hdr = {
2330
		.minorversion = nfs4_xdr_minorversion(&args->seq_args),
L
Linus Torvalds 已提交
2331 2332 2333
	};

	xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2334
	encode_compound_hdr(&xdr, req, &hdr);
2335
	encode_sequence(&xdr, &args->seq_args, &hdr);
2336 2337 2338
	encode_putfh(&xdr, args->fh, &hdr);
	encode_commit(&xdr, args, &hdr);
	encode_getfattr(&xdr, args->bitmask, &hdr);
2339
	encode_nops(&hdr);
2340
	return 0;
L
Linus Torvalds 已提交
2341 2342 2343 2344 2345
}

/*
 * FSINFO request
 */
A
Al Viro 已提交
2346
static int nfs4_xdr_enc_fsinfo(struct rpc_rqst *req, __be32 *p, struct nfs4_fsinfo_arg *args)
L
Linus Torvalds 已提交
2347 2348 2349
{
	struct xdr_stream xdr;
	struct compound_hdr hdr = {
2350
		.minorversion = nfs4_xdr_minorversion(&args->seq_args),
L
Linus Torvalds 已提交
2351 2352 2353
	};

	xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2354
	encode_compound_hdr(&xdr, req, &hdr);
2355
	encode_sequence(&xdr, &args->seq_args, &hdr);
2356 2357
	encode_putfh(&xdr, args->fh, &hdr);
	encode_fsinfo(&xdr, args->bitmask, &hdr);
2358
	encode_nops(&hdr);
2359
	return 0;
L
Linus Torvalds 已提交
2360 2361 2362 2363 2364
}

/*
 * a PATHCONF request
 */
A
Al Viro 已提交
2365
static int nfs4_xdr_enc_pathconf(struct rpc_rqst *req, __be32 *p, const struct nfs4_pathconf_arg *args)
L
Linus Torvalds 已提交
2366 2367 2368
{
	struct xdr_stream xdr;
	struct compound_hdr hdr = {
2369
		.minorversion = nfs4_xdr_minorversion(&args->seq_args),
L
Linus Torvalds 已提交
2370 2371 2372
	};

	xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2373
	encode_compound_hdr(&xdr, req, &hdr);
2374
	encode_sequence(&xdr, &args->seq_args, &hdr);
2375 2376 2377
	encode_putfh(&xdr, args->fh, &hdr);
	encode_getattr_one(&xdr, args->bitmask[0] & nfs4_pathconf_bitmap[0],
			   &hdr);
2378
	encode_nops(&hdr);
2379
	return 0;
L
Linus Torvalds 已提交
2380 2381 2382 2383 2384
}

/*
 * a STATFS request
 */
A
Al Viro 已提交
2385
static int nfs4_xdr_enc_statfs(struct rpc_rqst *req, __be32 *p, const struct nfs4_statfs_arg *args)
L
Linus Torvalds 已提交
2386 2387 2388
{
	struct xdr_stream xdr;
	struct compound_hdr hdr = {
2389
		.minorversion = nfs4_xdr_minorversion(&args->seq_args),
L
Linus Torvalds 已提交
2390 2391 2392
	};

	xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2393
	encode_compound_hdr(&xdr, req, &hdr);
2394
	encode_sequence(&xdr, &args->seq_args, &hdr);
2395 2396 2397
	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);
2398
	encode_nops(&hdr);
2399
	return 0;
L
Linus Torvalds 已提交
2400 2401 2402 2403 2404
}

/*
 * GETATTR_BITMAP request
 */
B
Benny Halevy 已提交
2405 2406
static int nfs4_xdr_enc_server_caps(struct rpc_rqst *req, __be32 *p,
				    struct nfs4_server_caps_arg *args)
L
Linus Torvalds 已提交
2407 2408 2409
{
	struct xdr_stream xdr;
	struct compound_hdr hdr = {
2410
		.minorversion = nfs4_xdr_minorversion(&args->seq_args),
L
Linus Torvalds 已提交
2411 2412 2413
	};

	xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2414
	encode_compound_hdr(&xdr, req, &hdr);
2415
	encode_sequence(&xdr, &args->seq_args, &hdr);
B
Benny Halevy 已提交
2416
	encode_putfh(&xdr, args->fhandle, &hdr);
2417 2418 2419 2420
	encode_getattr_one(&xdr, FATTR4_WORD0_SUPPORTED_ATTRS|
			   FATTR4_WORD0_LINK_SUPPORT|
			   FATTR4_WORD0_SYMLINK_SUPPORT|
			   FATTR4_WORD0_ACLSUPPORT, &hdr);
2421
	encode_nops(&hdr);
2422
	return 0;
L
Linus Torvalds 已提交
2423 2424 2425 2426 2427
}

/*
 * a RENEW request
 */
A
Al Viro 已提交
2428
static int nfs4_xdr_enc_renew(struct rpc_rqst *req, __be32 *p, struct nfs_client *clp)
L
Linus Torvalds 已提交
2429 2430 2431
{
	struct xdr_stream xdr;
	struct compound_hdr hdr = {
2432
		.nops	= 0,
L
Linus Torvalds 已提交
2433 2434 2435
	};

	xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2436
	encode_compound_hdr(&xdr, req, &hdr);
2437
	encode_renew(&xdr, clp, &hdr);
2438
	encode_nops(&hdr);
2439
	return 0;
L
Linus Torvalds 已提交
2440 2441 2442 2443 2444
}

/*
 * a SETCLIENTID request
 */
A
Al Viro 已提交
2445
static int nfs4_xdr_enc_setclientid(struct rpc_rqst *req, __be32 *p, struct nfs4_setclientid *sc)
L
Linus Torvalds 已提交
2446 2447 2448
{
	struct xdr_stream xdr;
	struct compound_hdr hdr = {
2449
		.nops	= 0,
L
Linus Torvalds 已提交
2450 2451 2452
	};

	xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2453
	encode_compound_hdr(&xdr, req, &hdr);
2454
	encode_setclientid(&xdr, sc, &hdr);
2455
	encode_nops(&hdr);
2456
	return 0;
L
Linus Torvalds 已提交
2457 2458 2459 2460 2461
}

/*
 * a SETCLIENTID_CONFIRM request
 */
2462
static int nfs4_xdr_enc_setclientid_confirm(struct rpc_rqst *req, __be32 *p, struct nfs4_setclientid_res *arg)
L
Linus Torvalds 已提交
2463 2464 2465
{
	struct xdr_stream xdr;
	struct compound_hdr hdr = {
2466
		.nops	= 0,
L
Linus Torvalds 已提交
2467 2468 2469 2470
	};
	const u32 lease_bitmap[2] = { FATTR4_WORD0_LEASE_TIME, 0 };

	xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2471
	encode_compound_hdr(&xdr, req, &hdr);
2472
	encode_setclientid_confirm(&xdr, arg, &hdr);
2473 2474
	encode_putrootfh(&xdr, &hdr);
	encode_fsinfo(&xdr, lease_bitmap, &hdr);
2475
	encode_nops(&hdr);
2476
	return 0;
L
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2477 2478 2479 2480 2481
}

/*
 * DELEGRETURN request
 */
A
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2482
static int nfs4_xdr_enc_delegreturn(struct rpc_rqst *req, __be32 *p, const struct nfs4_delegreturnargs *args)
L
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2483 2484 2485
{
	struct xdr_stream xdr;
	struct compound_hdr hdr = {
2486
		.minorversion = nfs4_xdr_minorversion(&args->seq_args),
L
Linus Torvalds 已提交
2487 2488 2489
	};

	xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2490
	encode_compound_hdr(&xdr, req, &hdr);
2491
	encode_sequence(&xdr, &args->seq_args, &hdr);
2492 2493 2494
	encode_putfh(&xdr, args->fhandle, &hdr);
	encode_delegreturn(&xdr, args->stateid, &hdr);
	encode_getfattr(&xdr, args->bitmask, &hdr);
2495
	encode_nops(&hdr);
2496
	return 0;
L
Linus Torvalds 已提交
2497 2498
}

2499 2500 2501
/*
 * Encode FS_LOCATIONS request
 */
A
Al Viro 已提交
2502
static int nfs4_xdr_enc_fs_locations(struct rpc_rqst *req, __be32 *p, struct nfs4_fs_locations_arg *args)
2503 2504 2505
{
	struct xdr_stream xdr;
	struct compound_hdr hdr = {
2506
		.minorversion = nfs4_xdr_minorversion(&args->seq_args),
2507
	};
2508
	uint32_t replen;
2509 2510

	xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2511
	encode_compound_hdr(&xdr, req, &hdr);
2512
	encode_sequence(&xdr, &args->seq_args, &hdr);
2513 2514
	encode_putfh(&xdr, args->dir_fh, &hdr);
	encode_lookup(&xdr, args->name, &hdr);
2515
	replen = hdr.replen;	/* get the attribute into args->page */
2516 2517
	encode_fs_locations(&xdr, args->bitmask, &hdr);

2518
	xdr_inline_pages(&req->rq_rcv_buf, replen << 2, &args->page,
2519
			0, PAGE_SIZE);
2520
	encode_nops(&hdr);
2521
	return 0;
2522 2523
}

B
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2524 2525 2526 2527 2528 2529 2530 2531 2532
#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 = {
2533
		.minorversion = args->client->cl_mvops->minor_version,
B
Benny Halevy 已提交
2534 2535 2536 2537 2538 2539 2540 2541
	};

	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;
}
A
Andy Adamson 已提交
2542

A
Andy Adamson 已提交
2543 2544 2545 2546 2547 2548 2549 2550
/*
 * 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 = {
2551
		.minorversion = args->client->cl_mvops->minor_version,
A
Andy Adamson 已提交
2552 2553 2554 2555 2556 2557 2558 2559 2560
	};

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

A
Andy Adamson 已提交
2561 2562 2563 2564 2565 2566 2567 2568
/*
 * 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 = {
2569
		.minorversion = session->clp->cl_mvops->minor_version,
A
Andy Adamson 已提交
2570 2571 2572 2573 2574 2575 2576 2577 2578
	};

	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
2579 2580 2581 2582 2583 2584 2585 2586 2587 2588 2589 2590 2591 2592 2593 2594 2595 2596
/*
 * 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
2597 2598 2599 2600 2601 2602 2603 2604 2605 2606 2607 2608 2609 2610 2611 2612 2613 2614 2615 2616
/*
 * 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;
}
2617 2618 2619 2620 2621 2622 2623 2624 2625 2626 2627 2628 2629 2630 2631 2632 2633 2634 2635 2636

/*
 * 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;
}

2637 2638 2639 2640 2641 2642 2643 2644 2645 2646 2647 2648 2649 2650 2651 2652 2653 2654 2655 2656 2657 2658 2659 2660 2661 2662 2663 2664 2665 2666 2667 2668 2669 2670 2671 2672 2673 2674 2675 2676 2677 2678 2679 2680 2681
/*
 * Encode GETDEVICEINFO request
 */
static int nfs4_xdr_enc_getdeviceinfo(struct rpc_rqst *req, uint32_t *p,
				      struct nfs4_getdeviceinfo_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_getdeviceinfo(&xdr, args, &hdr);

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

	encode_nops(&hdr);
	return 0;
}

/*
 *  Encode LAYOUTGET request
 */
static int nfs4_xdr_enc_layoutget(struct rpc_rqst *req, uint32_t *p,
				  struct nfs4_layoutget_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_putfh(&xdr, NFS_FH(args->inode), &hdr);
	encode_layoutget(&xdr, args, &hdr);
	encode_nops(&hdr);
	return 0;
}
B
Benny Halevy 已提交
2682 2683
#endif /* CONFIG_NFS_V4_1 */

2684 2685 2686 2687 2688 2689
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
2690

2691
static int decode_opaque_inline(struct xdr_stream *xdr, unsigned int *len, char **string)
L
Linus Torvalds 已提交
2692
{
A
Al Viro 已提交
2693
	__be32 *p;
L
Linus Torvalds 已提交
2694

B
Benny Halevy 已提交
2695 2696 2697
	p = xdr_inline_decode(xdr, 4);
	if (unlikely(!p))
		goto out_overflow;
2698
	*len = be32_to_cpup(p);
B
Benny Halevy 已提交
2699 2700 2701
	p = xdr_inline_decode(xdr, *len);
	if (unlikely(!p))
		goto out_overflow;
L
Linus Torvalds 已提交
2702 2703
	*string = (char *)p;
	return 0;
B
Benny Halevy 已提交
2704 2705 2706
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
L
Linus Torvalds 已提交
2707 2708 2709 2710
}

static int decode_compound_hdr(struct xdr_stream *xdr, struct compound_hdr *hdr)
{
A
Al Viro 已提交
2711
	__be32 *p;
L
Linus Torvalds 已提交
2712

B
Benny Halevy 已提交
2713 2714 2715
	p = xdr_inline_decode(xdr, 8);
	if (unlikely(!p))
		goto out_overflow;
B
Benny Halevy 已提交
2716
	hdr->status = be32_to_cpup(p++);
2717
	hdr->taglen = be32_to_cpup(p);
2718

B
Benny Halevy 已提交
2719 2720 2721
	p = xdr_inline_decode(xdr, hdr->taglen + 4);
	if (unlikely(!p))
		goto out_overflow;
L
Linus Torvalds 已提交
2722 2723
	hdr->tag = (char *)p;
	p += XDR_QUADLEN(hdr->taglen);
2724
	hdr->nops = be32_to_cpup(p);
2725 2726
	if (unlikely(hdr->nops < 1))
		return nfs4_stat_to_errno(hdr->status);
L
Linus Torvalds 已提交
2727
	return 0;
B
Benny Halevy 已提交
2728 2729 2730
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
L
Linus Torvalds 已提交
2731 2732 2733 2734
}

static int decode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 expected)
{
A
Al Viro 已提交
2735
	__be32 *p;
L
Linus Torvalds 已提交
2736 2737 2738
	uint32_t opnum;
	int32_t nfserr;

B
Benny Halevy 已提交
2739 2740 2741
	p = xdr_inline_decode(xdr, 8);
	if (unlikely(!p))
		goto out_overflow;
B
Benny Halevy 已提交
2742
	opnum = be32_to_cpup(p++);
L
Linus Torvalds 已提交
2743
	if (opnum != expected) {
2744 2745
		dprintk("nfs: Server returned operation"
			" %d but we issued a request for %d\n",
L
Linus Torvalds 已提交
2746 2747 2748
				opnum, expected);
		return -EIO;
	}
2749
	nfserr = be32_to_cpup(p);
L
Linus Torvalds 已提交
2750
	if (nfserr != NFS_OK)
2751
		return nfs4_stat_to_errno(nfserr);
L
Linus Torvalds 已提交
2752
	return 0;
B
Benny Halevy 已提交
2753 2754 2755
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
L
Linus Torvalds 已提交
2756 2757 2758
}

/* Dummy routine */
2759
static int decode_ace(struct xdr_stream *xdr, void *ace, struct nfs_client *clp)
L
Linus Torvalds 已提交
2760
{
A
Al Viro 已提交
2761
	__be32 *p;
2762
	unsigned int strlen;
L
Linus Torvalds 已提交
2763 2764
	char *str;

B
Benny Halevy 已提交
2765 2766 2767 2768 2769
	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
2770 2771 2772 2773
}

static int decode_attr_bitmap(struct xdr_stream *xdr, uint32_t *bitmap)
{
A
Al Viro 已提交
2774 2775
	uint32_t bmlen;
	__be32 *p;
L
Linus Torvalds 已提交
2776

B
Benny Halevy 已提交
2777 2778 2779
	p = xdr_inline_decode(xdr, 4);
	if (unlikely(!p))
		goto out_overflow;
2780
	bmlen = be32_to_cpup(p);
L
Linus Torvalds 已提交
2781 2782

	bitmap[0] = bitmap[1] = 0;
B
Benny Halevy 已提交
2783 2784 2785
	p = xdr_inline_decode(xdr, (bmlen << 2));
	if (unlikely(!p))
		goto out_overflow;
L
Linus Torvalds 已提交
2786
	if (bmlen > 0) {
B
Benny Halevy 已提交
2787
		bitmap[0] = be32_to_cpup(p++);
L
Linus Torvalds 已提交
2788
		if (bmlen > 1)
2789
			bitmap[1] = be32_to_cpup(p);
L
Linus Torvalds 已提交
2790 2791
	}
	return 0;
B
Benny Halevy 已提交
2792 2793 2794
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
L
Linus Torvalds 已提交
2795 2796
}

A
Al Viro 已提交
2797
static inline int decode_attr_length(struct xdr_stream *xdr, uint32_t *attrlen, __be32 **savep)
L
Linus Torvalds 已提交
2798
{
A
Al Viro 已提交
2799
	__be32 *p;
L
Linus Torvalds 已提交
2800

B
Benny Halevy 已提交
2801 2802 2803
	p = xdr_inline_decode(xdr, 4);
	if (unlikely(!p))
		goto out_overflow;
2804
	*attrlen = be32_to_cpup(p);
L
Linus Torvalds 已提交
2805 2806
	*savep = xdr->p;
	return 0;
B
Benny Halevy 已提交
2807 2808 2809
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
L
Linus Torvalds 已提交
2810 2811 2812 2813 2814
}

static int decode_attr_supported(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *bitmask)
{
	if (likely(bitmap[0] & FATTR4_WORD0_SUPPORTED_ATTRS)) {
R
Roman Borisov 已提交
2815 2816 2817 2818
		int ret;
		ret = decode_attr_bitmap(xdr, bitmask);
		if (unlikely(ret < 0))
			return ret;
L
Linus Torvalds 已提交
2819 2820 2821
		bitmap[0] &= ~FATTR4_WORD0_SUPPORTED_ATTRS;
	} else
		bitmask[0] = bitmask[1] = 0;
2822
	dprintk("%s: bitmask=%08x:%08x\n", __func__, bitmask[0], bitmask[1]);
L
Linus Torvalds 已提交
2823 2824 2825 2826 2827
	return 0;
}

static int decode_attr_type(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *type)
{
A
Al Viro 已提交
2828
	__be32 *p;
2829
	int ret = 0;
L
Linus Torvalds 已提交
2830 2831 2832 2833 2834

	*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
2835 2836 2837
		p = xdr_inline_decode(xdr, 4);
		if (unlikely(!p))
			goto out_overflow;
2838
		*type = be32_to_cpup(p);
L
Linus Torvalds 已提交
2839
		if (*type < NF4REG || *type > NF4NAMEDATTR) {
2840
			dprintk("%s: bad type %d\n", __func__, *type);
L
Linus Torvalds 已提交
2841 2842 2843
			return -EIO;
		}
		bitmap[0] &= ~FATTR4_WORD0_TYPE;
2844
		ret = NFS_ATTR_FATTR_TYPE;
L
Linus Torvalds 已提交
2845
	}
2846
	dprintk("%s: type=0%o\n", __func__, nfs_type2fmt[*type]);
2847
	return ret;
B
Benny Halevy 已提交
2848 2849 2850
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
L
Linus Torvalds 已提交
2851 2852 2853 2854
}

static int decode_attr_change(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *change)
{
A
Al Viro 已提交
2855
	__be32 *p;
2856
	int ret = 0;
L
Linus Torvalds 已提交
2857 2858 2859 2860 2861

	*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
2862 2863 2864
		p = xdr_inline_decode(xdr, 8);
		if (unlikely(!p))
			goto out_overflow;
2865
		xdr_decode_hyper(p, change);
L
Linus Torvalds 已提交
2866
		bitmap[0] &= ~FATTR4_WORD0_CHANGE;
2867
		ret = NFS_ATTR_FATTR_CHANGE;
L
Linus Torvalds 已提交
2868
	}
2869
	dprintk("%s: change attribute=%Lu\n", __func__,
L
Linus Torvalds 已提交
2870
			(unsigned long long)*change);
2871
	return ret;
B
Benny Halevy 已提交
2872 2873 2874
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
L
Linus Torvalds 已提交
2875 2876 2877 2878
}

static int decode_attr_size(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *size)
{
A
Al Viro 已提交
2879
	__be32 *p;
2880
	int ret = 0;
L
Linus Torvalds 已提交
2881 2882 2883 2884 2885

	*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
2886 2887 2888
		p = xdr_inline_decode(xdr, 8);
		if (unlikely(!p))
			goto out_overflow;
2889
		xdr_decode_hyper(p, size);
L
Linus Torvalds 已提交
2890
		bitmap[0] &= ~FATTR4_WORD0_SIZE;
2891
		ret = NFS_ATTR_FATTR_SIZE;
L
Linus Torvalds 已提交
2892
	}
2893
	dprintk("%s: file size=%Lu\n", __func__, (unsigned long long)*size);
2894
	return ret;
B
Benny Halevy 已提交
2895 2896 2897
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
L
Linus Torvalds 已提交
2898 2899 2900 2901
}

static int decode_attr_link_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
{
A
Al Viro 已提交
2902
	__be32 *p;
L
Linus Torvalds 已提交
2903 2904 2905 2906 2907

	*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
2908 2909 2910
		p = xdr_inline_decode(xdr, 4);
		if (unlikely(!p))
			goto out_overflow;
2911
		*res = be32_to_cpup(p);
L
Linus Torvalds 已提交
2912 2913
		bitmap[0] &= ~FATTR4_WORD0_LINK_SUPPORT;
	}
2914
	dprintk("%s: link support=%s\n", __func__, *res == 0 ? "false" : "true");
L
Linus Torvalds 已提交
2915
	return 0;
B
Benny Halevy 已提交
2916 2917 2918
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
L
Linus Torvalds 已提交
2919 2920 2921 2922
}

static int decode_attr_symlink_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
{
A
Al Viro 已提交
2923
	__be32 *p;
L
Linus Torvalds 已提交
2924 2925 2926 2927 2928

	*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
2929 2930 2931
		p = xdr_inline_decode(xdr, 4);
		if (unlikely(!p))
			goto out_overflow;
2932
		*res = be32_to_cpup(p);
L
Linus Torvalds 已提交
2933 2934
		bitmap[0] &= ~FATTR4_WORD0_SYMLINK_SUPPORT;
	}
2935
	dprintk("%s: symlink support=%s\n", __func__, *res == 0 ? "false" : "true");
L
Linus Torvalds 已提交
2936
	return 0;
B
Benny Halevy 已提交
2937 2938 2939
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
L
Linus Torvalds 已提交
2940 2941
}

2942
static int decode_attr_fsid(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_fsid *fsid)
L
Linus Torvalds 已提交
2943
{
A
Al Viro 已提交
2944
	__be32 *p;
2945
	int ret = 0;
L
Linus Torvalds 已提交
2946 2947 2948 2949 2950 2951

	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
2952 2953 2954
		p = xdr_inline_decode(xdr, 16);
		if (unlikely(!p))
			goto out_overflow;
B
Benny Halevy 已提交
2955
		p = xdr_decode_hyper(p, &fsid->major);
2956
		xdr_decode_hyper(p, &fsid->minor);
L
Linus Torvalds 已提交
2957
		bitmap[0] &= ~FATTR4_WORD0_FSID;
2958
		ret = NFS_ATTR_FATTR_FSID;
L
Linus Torvalds 已提交
2959
	}
2960
	dprintk("%s: fsid=(0x%Lx/0x%Lx)\n", __func__,
L
Linus Torvalds 已提交
2961 2962
			(unsigned long long)fsid->major,
			(unsigned long long)fsid->minor);
2963
	return ret;
B
Benny Halevy 已提交
2964 2965 2966
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
L
Linus Torvalds 已提交
2967 2968 2969 2970
}

static int decode_attr_lease_time(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
{
A
Al Viro 已提交
2971
	__be32 *p;
L
Linus Torvalds 已提交
2972 2973 2974 2975 2976

	*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
2977 2978 2979
		p = xdr_inline_decode(xdr, 4);
		if (unlikely(!p))
			goto out_overflow;
2980
		*res = be32_to_cpup(p);
L
Linus Torvalds 已提交
2981 2982
		bitmap[0] &= ~FATTR4_WORD0_LEASE_TIME;
	}
2983
	dprintk("%s: file size=%u\n", __func__, (unsigned int)*res);
L
Linus Torvalds 已提交
2984
	return 0;
B
Benny Halevy 已提交
2985 2986 2987
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
L
Linus Torvalds 已提交
2988 2989
}

2990 2991 2992 2993 2994 2995 2996 2997 2998 2999 3000 3001 3002 3003 3004 3005 3006 3007 3008 3009 3010 3011 3012
static int decode_attr_error(struct xdr_stream *xdr, uint32_t *bitmap)
{
	__be32 *p;

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

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

3013 3014
	if (fh != NULL)
		memset(fh, 0, sizeof(*fh));
3015 3016 3017 3018 3019 3020 3021 3022 3023 3024 3025 3026 3027

	if (unlikely(bitmap[0] & (FATTR4_WORD0_FILEHANDLE - 1U)))
		return -EIO;
	if (likely(bitmap[0] & FATTR4_WORD0_FILEHANDLE)) {
		p = xdr_inline_decode(xdr, 4);
		if (unlikely(!p))
			goto out_overflow;
		len = be32_to_cpup(p);
		if (len > NFS4_FHSIZE)
			return -EIO;
		p = xdr_inline_decode(xdr, len);
		if (unlikely(!p))
			goto out_overflow;
3028 3029 3030 3031
		if (fh != NULL) {
			memcpy(fh->data, p, len);
			fh->size = len;
		}
3032 3033 3034 3035 3036 3037 3038 3039
		bitmap[0] &= ~FATTR4_WORD0_FILEHANDLE;
	}
	return 0;
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
}

L
Linus Torvalds 已提交
3040 3041
static int decode_attr_aclsupport(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
{
A
Al Viro 已提交
3042
	__be32 *p;
L
Linus Torvalds 已提交
3043 3044 3045 3046 3047

	*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
3048 3049 3050
		p = xdr_inline_decode(xdr, 4);
		if (unlikely(!p))
			goto out_overflow;
3051
		*res = be32_to_cpup(p);
L
Linus Torvalds 已提交
3052 3053
		bitmap[0] &= ~FATTR4_WORD0_ACLSUPPORT;
	}
3054
	dprintk("%s: ACLs supported=%u\n", __func__, (unsigned int)*res);
L
Linus Torvalds 已提交
3055
	return 0;
B
Benny Halevy 已提交
3056 3057 3058
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
L
Linus Torvalds 已提交
3059 3060 3061 3062
}

static int decode_attr_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
{
A
Al Viro 已提交
3063
	__be32 *p;
3064
	int ret = 0;
L
Linus Torvalds 已提交
3065 3066 3067 3068 3069

	*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
3070 3071 3072
		p = xdr_inline_decode(xdr, 8);
		if (unlikely(!p))
			goto out_overflow;
3073
		xdr_decode_hyper(p, fileid);
L
Linus Torvalds 已提交
3074
		bitmap[0] &= ~FATTR4_WORD0_FILEID;
3075
		ret = NFS_ATTR_FATTR_FILEID;
L
Linus Torvalds 已提交
3076
	}
3077
	dprintk("%s: fileid=%Lu\n", __func__, (unsigned long long)*fileid);
3078
	return ret;
B
Benny Halevy 已提交
3079 3080 3081
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
L
Linus Torvalds 已提交
3082 3083
}

3084 3085
static int decode_attr_mounted_on_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
{
A
Al Viro 已提交
3086
	__be32 *p;
3087
	int ret = 0;
3088 3089 3090 3091 3092

	*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
3093 3094 3095
		p = xdr_inline_decode(xdr, 8);
		if (unlikely(!p))
			goto out_overflow;
3096
		xdr_decode_hyper(p, fileid);
3097
		bitmap[1] &= ~FATTR4_WORD1_MOUNTED_ON_FILEID;
3098
		ret = NFS_ATTR_FATTR_FILEID;
3099
	}
3100
	dprintk("%s: fileid=%Lu\n", __func__, (unsigned long long)*fileid);
3101
	return ret;
B
Benny Halevy 已提交
3102 3103 3104
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
3105 3106
}

L
Linus Torvalds 已提交
3107 3108
static int decode_attr_files_avail(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_FILES_AVAIL - 1U)))
		return -EIO;
	if (likely(bitmap[0] & FATTR4_WORD0_FILES_AVAIL)) {
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_FILES_AVAIL;
	}
3122
	dprintk("%s: files avail=%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_files_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
{
A
Al Viro 已提交
3131
	__be32 *p;
L
Linus Torvalds 已提交
3132 3133 3134 3135 3136 3137
	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
3138 3139 3140
		p = xdr_inline_decode(xdr, 8);
		if (unlikely(!p))
			goto out_overflow;
3141
		xdr_decode_hyper(p, res);
L
Linus Torvalds 已提交
3142 3143
		bitmap[0] &= ~FATTR4_WORD0_FILES_FREE;
	}
3144
	dprintk("%s: files free=%Lu\n", __func__, (unsigned long long)*res);
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_files_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
{
A
Al Viro 已提交
3153
	__be32 *p;
L
Linus Torvalds 已提交
3154 3155 3156 3157 3158 3159
	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
3160 3161 3162
		p = xdr_inline_decode(xdr, 8);
		if (unlikely(!p))
			goto out_overflow;
3163
		xdr_decode_hyper(p, res);
L
Linus Torvalds 已提交
3164 3165
		bitmap[0] &= ~FATTR4_WORD0_FILES_TOTAL;
	}
3166
	dprintk("%s: files total=%Lu\n", __func__, (unsigned long long)*res);
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_pathname(struct xdr_stream *xdr, struct nfs4_pathname *path)
{
3175
	u32 n;
A
Al Viro 已提交
3176
	__be32 *p;
3177 3178
	int status = 0;

B
Benny Halevy 已提交
3179 3180 3181
	p = xdr_inline_decode(xdr, 4);
	if (unlikely(!p))
		goto out_overflow;
3182
	n = be32_to_cpup(p);
3183 3184
	if (n == 0)
		goto root_path;
3185 3186 3187 3188 3189 3190 3191 3192 3193 3194 3195 3196 3197 3198 3199 3200 3201 3202 3203 3204
	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;
3205 3206 3207 3208 3209 3210 3211
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;
3212 3213 3214 3215
out_eio:
	dprintk(" status %d", status);
	status = -EIO;
	goto out;
B
Benny Halevy 已提交
3216 3217 3218
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
3219 3220 3221
}

static int decode_attr_fs_locations(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs4_fs_locations *res)
3222 3223
{
	int n;
A
Al Viro 已提交
3224
	__be32 *p;
3225 3226 3227 3228 3229 3230 3231
	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;
3232
	dprintk("%s: fsroot ", __func__);
3233
	status = decode_pathname(xdr, &res->fs_path);
3234 3235
	if (unlikely(status != 0))
		goto out;
B
Benny Halevy 已提交
3236 3237 3238
	p = xdr_inline_decode(xdr, 4);
	if (unlikely(!p))
		goto out_overflow;
3239
	n = be32_to_cpup(p);
3240 3241 3242 3243
	if (n <= 0)
		goto out_eio;
	res->nlocations = 0;
	while (res->nlocations < n) {
3244
		u32 m;
3245
		struct nfs4_fs_location *loc = &res->locations[res->nlocations];
3246

B
Benny Halevy 已提交
3247 3248 3249
		p = xdr_inline_decode(xdr, 4);
		if (unlikely(!p))
			goto out_overflow;
3250
		m = be32_to_cpup(p);
3251 3252

		loc->nservers = 0;
3253
		dprintk("%s: servers ", __func__);
3254 3255 3256 3257 3258 3259 3260 3261 3262
		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 {
3263 3264 3265
				unsigned int i;
				dprintk("%s: using first %u of %u servers "
					"returned for location %u\n",
3266
						__func__,
3267 3268
						NFS4_FS_LOCATION_MAXSERVERS,
						m, res->nlocations);
3269
				for (i = loc->nservers; i < m; i++) {
T
Trond Myklebust 已提交
3270
					unsigned int len;
3271 3272 3273 3274 3275 3276 3277 3278
					char *data;
					status = decode_opaque_inline(xdr, &len, &data);
					if (unlikely(status != 0))
						goto out_eio;
				}
			}
		}
		status = decode_pathname(xdr, &loc->rootpath);
3279 3280
		if (unlikely(status != 0))
			goto out_eio;
3281
		if (res->nlocations < NFS4_FS_LOCATIONS_MAXENTRIES)
3282 3283
			res->nlocations++;
	}
3284 3285
	if (res->nlocations != 0)
		status = NFS_ATTR_FATTR_V4_REFERRAL;
3286
out:
3287
	dprintk("%s: fs_locations done, error = %d\n", __func__, status);
3288
	return status;
B
Benny Halevy 已提交
3289 3290
out_overflow:
	print_overflow_msg(__func__, xdr);
3291 3292 3293 3294 3295
out_eio:
	status = -EIO;
	goto out;
}

L
Linus Torvalds 已提交
3296 3297
static int decode_attr_maxfilesize(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
{
A
Al Viro 已提交
3298
	__be32 *p;
L
Linus Torvalds 已提交
3299 3300 3301 3302 3303 3304
	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
3305 3306 3307
		p = xdr_inline_decode(xdr, 8);
		if (unlikely(!p))
			goto out_overflow;
3308
		xdr_decode_hyper(p, res);
L
Linus Torvalds 已提交
3309 3310
		bitmap[0] &= ~FATTR4_WORD0_MAXFILESIZE;
	}
3311
	dprintk("%s: maxfilesize=%Lu\n", __func__, (unsigned long long)*res);
L
Linus Torvalds 已提交
3312
	return status;
B
Benny Halevy 已提交
3313 3314 3315
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
L
Linus Torvalds 已提交
3316 3317 3318 3319
}

static int decode_attr_maxlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxlink)
{
A
Al Viro 已提交
3320
	__be32 *p;
L
Linus Torvalds 已提交
3321 3322 3323 3324 3325 3326
	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
3327 3328 3329
		p = xdr_inline_decode(xdr, 4);
		if (unlikely(!p))
			goto out_overflow;
3330
		*maxlink = be32_to_cpup(p);
L
Linus Torvalds 已提交
3331 3332
		bitmap[0] &= ~FATTR4_WORD0_MAXLINK;
	}
3333
	dprintk("%s: maxlink=%u\n", __func__, *maxlink);
L
Linus Torvalds 已提交
3334
	return status;
B
Benny Halevy 已提交
3335 3336 3337
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
L
Linus Torvalds 已提交
3338 3339 3340 3341
}

static int decode_attr_maxname(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxname)
{
A
Al Viro 已提交
3342
	__be32 *p;
L
Linus Torvalds 已提交
3343 3344 3345 3346 3347 3348
	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
3349 3350 3351
		p = xdr_inline_decode(xdr, 4);
		if (unlikely(!p))
			goto out_overflow;
3352
		*maxname = be32_to_cpup(p);
L
Linus Torvalds 已提交
3353 3354
		bitmap[0] &= ~FATTR4_WORD0_MAXNAME;
	}
3355
	dprintk("%s: maxname=%u\n", __func__, *maxname);
L
Linus Torvalds 已提交
3356
	return status;
B
Benny Halevy 已提交
3357 3358 3359
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
L
Linus Torvalds 已提交
3360 3361 3362 3363
}

static int decode_attr_maxread(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
{
A
Al Viro 已提交
3364
	__be32 *p;
L
Linus Torvalds 已提交
3365 3366 3367 3368 3369 3370 3371
	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
3372 3373 3374
		p = xdr_inline_decode(xdr, 8);
		if (unlikely(!p))
			goto out_overflow;
3375
		xdr_decode_hyper(p, &maxread);
L
Linus Torvalds 已提交
3376 3377 3378 3379 3380
		if (maxread > 0x7FFFFFFF)
			maxread = 0x7FFFFFFF;
		*res = (uint32_t)maxread;
		bitmap[0] &= ~FATTR4_WORD0_MAXREAD;
	}
3381
	dprintk("%s: maxread=%lu\n", __func__, (unsigned long)*res);
L
Linus Torvalds 已提交
3382
	return status;
B
Benny Halevy 已提交
3383 3384 3385
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
L
Linus Torvalds 已提交
3386 3387 3388 3389
}

static int decode_attr_maxwrite(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
{
A
Al Viro 已提交
3390
	__be32 *p;
L
Linus Torvalds 已提交
3391 3392 3393 3394 3395 3396 3397
	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
3398 3399 3400
		p = xdr_inline_decode(xdr, 8);
		if (unlikely(!p))
			goto out_overflow;
3401
		xdr_decode_hyper(p, &maxwrite);
L
Linus Torvalds 已提交
3402 3403 3404 3405 3406
		if (maxwrite > 0x7FFFFFFF)
			maxwrite = 0x7FFFFFFF;
		*res = (uint32_t)maxwrite;
		bitmap[0] &= ~FATTR4_WORD0_MAXWRITE;
	}
3407
	dprintk("%s: maxwrite=%lu\n", __func__, (unsigned long)*res);
L
Linus Torvalds 已提交
3408
	return status;
B
Benny Halevy 已提交
3409 3410 3411
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
L
Linus Torvalds 已提交
3412 3413
}

3414
static int decode_attr_mode(struct xdr_stream *xdr, uint32_t *bitmap, umode_t *mode)
L
Linus Torvalds 已提交
3415
{
3416
	uint32_t tmp;
A
Al Viro 已提交
3417
	__be32 *p;
3418
	int ret = 0;
L
Linus Torvalds 已提交
3419 3420 3421 3422 3423

	*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
3424 3425 3426
		p = xdr_inline_decode(xdr, 4);
		if (unlikely(!p))
			goto out_overflow;
3427
		tmp = be32_to_cpup(p);
3428
		*mode = tmp & ~S_IFMT;
L
Linus Torvalds 已提交
3429
		bitmap[1] &= ~FATTR4_WORD1_MODE;
3430
		ret = NFS_ATTR_FATTR_MODE;
L
Linus Torvalds 已提交
3431
	}
3432
	dprintk("%s: file mode=0%o\n", __func__, (unsigned int)*mode);
3433
	return ret;
B
Benny Halevy 已提交
3434 3435 3436
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
L
Linus Torvalds 已提交
3437 3438 3439 3440
}

static int decode_attr_nlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *nlink)
{
A
Al Viro 已提交
3441
	__be32 *p;
3442
	int ret = 0;
L
Linus Torvalds 已提交
3443 3444 3445 3446 3447

	*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
3448 3449 3450
		p = xdr_inline_decode(xdr, 4);
		if (unlikely(!p))
			goto out_overflow;
3451
		*nlink = be32_to_cpup(p);
L
Linus Torvalds 已提交
3452
		bitmap[1] &= ~FATTR4_WORD1_NUMLINKS;
3453
		ret = NFS_ATTR_FATTR_NLINK;
L
Linus Torvalds 已提交
3454
	}
3455
	dprintk("%s: nlink=%u\n", __func__, (unsigned int)*nlink);
3456
	return ret;
B
Benny Halevy 已提交
3457 3458 3459
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
L
Linus Torvalds 已提交
3460 3461
}

3462 3463
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
3464
{
A
Al Viro 已提交
3465 3466
	uint32_t len;
	__be32 *p;
3467
	int ret = 0;
L
Linus Torvalds 已提交
3468 3469 3470 3471 3472

	*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
3473 3474 3475
		p = xdr_inline_decode(xdr, 4);
		if (unlikely(!p))
			goto out_overflow;
3476
		len = be32_to_cpup(p);
B
Benny Halevy 已提交
3477 3478 3479
		p = xdr_inline_decode(xdr, len);
		if (unlikely(!p))
			goto out_overflow;
3480 3481 3482
		if (!may_sleep) {
			/* do nothing */
		} else if (len < XDR_MAX_NETOBJ) {
3483 3484 3485
			if (nfs_map_name_to_uid(clp, (char *)p, len, uid) == 0)
				ret = NFS_ATTR_FATTR_OWNER;
			else
L
Linus Torvalds 已提交
3486
				dprintk("%s: nfs_map_name_to_uid failed!\n",
3487
						__func__);
L
Linus Torvalds 已提交
3488
		} else
3489
			dprintk("%s: name too long (%u)!\n",
3490
					__func__, len);
L
Linus Torvalds 已提交
3491 3492
		bitmap[1] &= ~FATTR4_WORD1_OWNER;
	}
3493
	dprintk("%s: uid=%d\n", __func__, (int)*uid);
3494
	return ret;
B
Benny Halevy 已提交
3495 3496 3497
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
L
Linus Torvalds 已提交
3498 3499
}

3500 3501
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
3502
{
A
Al Viro 已提交
3503 3504
	uint32_t len;
	__be32 *p;
3505
	int ret = 0;
L
Linus Torvalds 已提交
3506 3507 3508 3509 3510

	*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
3511 3512 3513
		p = xdr_inline_decode(xdr, 4);
		if (unlikely(!p))
			goto out_overflow;
3514
		len = be32_to_cpup(p);
B
Benny Halevy 已提交
3515 3516 3517
		p = xdr_inline_decode(xdr, len);
		if (unlikely(!p))
			goto out_overflow;
3518 3519 3520
		if (!may_sleep) {
			/* do nothing */
		} else if (len < XDR_MAX_NETOBJ) {
3521 3522 3523
			if (nfs_map_group_to_gid(clp, (char *)p, len, gid) == 0)
				ret = NFS_ATTR_FATTR_GROUP;
			else
L
Linus Torvalds 已提交
3524
				dprintk("%s: nfs_map_group_to_gid failed!\n",
3525
						__func__);
L
Linus Torvalds 已提交
3526
		} else
3527
			dprintk("%s: name too long (%u)!\n",
3528
					__func__, len);
L
Linus Torvalds 已提交
3529 3530
		bitmap[1] &= ~FATTR4_WORD1_OWNER_GROUP;
	}
3531
	dprintk("%s: gid=%d\n", __func__, (int)*gid);
3532
	return ret;
B
Benny Halevy 已提交
3533 3534 3535
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
L
Linus Torvalds 已提交
3536 3537 3538 3539
}

static int decode_attr_rdev(struct xdr_stream *xdr, uint32_t *bitmap, dev_t *rdev)
{
A
Al Viro 已提交
3540 3541
	uint32_t major = 0, minor = 0;
	__be32 *p;
3542
	int ret = 0;
L
Linus Torvalds 已提交
3543 3544 3545 3546 3547 3548 3549

	*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
3550 3551 3552
		p = xdr_inline_decode(xdr, 8);
		if (unlikely(!p))
			goto out_overflow;
B
Benny Halevy 已提交
3553
		major = be32_to_cpup(p++);
3554
		minor = be32_to_cpup(p);
L
Linus Torvalds 已提交
3555 3556 3557 3558
		tmp = MKDEV(major, minor);
		if (MAJOR(tmp) == major && MINOR(tmp) == minor)
			*rdev = tmp;
		bitmap[1] &= ~ FATTR4_WORD1_RAWDEV;
3559
		ret = NFS_ATTR_FATTR_RDEV;
L
Linus Torvalds 已提交
3560
	}
3561
	dprintk("%s: rdev=(0x%x:0x%x)\n", __func__, major, minor);
3562
	return ret;
B
Benny Halevy 已提交
3563 3564 3565
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
L
Linus Torvalds 已提交
3566 3567 3568 3569
}

static int decode_attr_space_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
{
A
Al Viro 已提交
3570
	__be32 *p;
L
Linus Torvalds 已提交
3571 3572 3573 3574 3575 3576
	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
3577 3578 3579
		p = xdr_inline_decode(xdr, 8);
		if (unlikely(!p))
			goto out_overflow;
3580
		xdr_decode_hyper(p, res);
L
Linus Torvalds 已提交
3581 3582
		bitmap[1] &= ~FATTR4_WORD1_SPACE_AVAIL;
	}
3583
	dprintk("%s: space avail=%Lu\n", __func__, (unsigned long long)*res);
L
Linus Torvalds 已提交
3584
	return status;
B
Benny Halevy 已提交
3585 3586 3587
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
L
Linus Torvalds 已提交
3588 3589 3590 3591
}

static int decode_attr_space_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
{
A
Al Viro 已提交
3592
	__be32 *p;
L
Linus Torvalds 已提交
3593 3594 3595 3596 3597 3598
	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
3599 3600 3601
		p = xdr_inline_decode(xdr, 8);
		if (unlikely(!p))
			goto out_overflow;
3602
		xdr_decode_hyper(p, res);
L
Linus Torvalds 已提交
3603 3604
		bitmap[1] &= ~FATTR4_WORD1_SPACE_FREE;
	}
3605
	dprintk("%s: space free=%Lu\n", __func__, (unsigned long long)*res);
L
Linus Torvalds 已提交
3606
	return status;
B
Benny Halevy 已提交
3607 3608 3609
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
L
Linus Torvalds 已提交
3610 3611 3612 3613
}

static int decode_attr_space_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
{
A
Al Viro 已提交
3614
	__be32 *p;
L
Linus Torvalds 已提交
3615 3616 3617 3618 3619 3620
	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
3621 3622 3623
		p = xdr_inline_decode(xdr, 8);
		if (unlikely(!p))
			goto out_overflow;
3624
		xdr_decode_hyper(p, res);
L
Linus Torvalds 已提交
3625 3626
		bitmap[1] &= ~FATTR4_WORD1_SPACE_TOTAL;
	}
3627
	dprintk("%s: space total=%Lu\n", __func__, (unsigned long long)*res);
L
Linus Torvalds 已提交
3628
	return status;
B
Benny Halevy 已提交
3629 3630 3631
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
L
Linus Torvalds 已提交
3632 3633 3634 3635
}

static int decode_attr_space_used(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *used)
{
A
Al Viro 已提交
3636
	__be32 *p;
3637
	int ret = 0;
L
Linus Torvalds 已提交
3638 3639 3640 3641 3642

	*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
3643 3644 3645
		p = xdr_inline_decode(xdr, 8);
		if (unlikely(!p))
			goto out_overflow;
3646
		xdr_decode_hyper(p, used);
L
Linus Torvalds 已提交
3647
		bitmap[1] &= ~FATTR4_WORD1_SPACE_USED;
3648
		ret = NFS_ATTR_FATTR_SPACE_USED;
L
Linus Torvalds 已提交
3649
	}
3650
	dprintk("%s: space used=%Lu\n", __func__,
L
Linus Torvalds 已提交
3651
			(unsigned long long)*used);
3652
	return ret;
B
Benny Halevy 已提交
3653 3654 3655
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
L
Linus Torvalds 已提交
3656 3657 3658 3659
}

static int decode_attr_time(struct xdr_stream *xdr, struct timespec *time)
{
A
Al Viro 已提交
3660
	__be32 *p;
L
Linus Torvalds 已提交
3661 3662 3663
	uint64_t sec;
	uint32_t nsec;

B
Benny Halevy 已提交
3664 3665 3666
	p = xdr_inline_decode(xdr, 12);
	if (unlikely(!p))
		goto out_overflow;
B
Benny Halevy 已提交
3667
	p = xdr_decode_hyper(p, &sec);
3668
	nsec = be32_to_cpup(p);
L
Linus Torvalds 已提交
3669 3670 3671
	time->tv_sec = (time_t)sec;
	time->tv_nsec = (long)nsec;
	return 0;
B
Benny Halevy 已提交
3672 3673 3674
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
L
Linus Torvalds 已提交
3675 3676 3677 3678 3679 3680 3681 3682 3683 3684 3685 3686
}

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);
3687 3688
		if (status == 0)
			status = NFS_ATTR_FATTR_ATIME;
L
Linus Torvalds 已提交
3689 3690
		bitmap[1] &= ~FATTR4_WORD1_TIME_ACCESS;
	}
3691
	dprintk("%s: atime=%ld\n", __func__, (long)time->tv_sec);
L
Linus Torvalds 已提交
3692 3693 3694 3695 3696 3697 3698 3699 3700 3701 3702 3703 3704
	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);
3705 3706
		if (status == 0)
			status = NFS_ATTR_FATTR_CTIME;
L
Linus Torvalds 已提交
3707 3708
		bitmap[1] &= ~FATTR4_WORD1_TIME_METADATA;
	}
3709
	dprintk("%s: ctime=%ld\n", __func__, (long)time->tv_sec);
L
Linus Torvalds 已提交
3710 3711 3712
	return status;
}

3713 3714 3715 3716 3717 3718 3719 3720 3721 3722 3723 3724 3725 3726 3727 3728 3729 3730
static int decode_attr_time_delta(struct xdr_stream *xdr, uint32_t *bitmap,
				  struct timespec *time)
{
	int status = 0;

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

L
Linus Torvalds 已提交
3731 3732 3733 3734 3735 3736 3737 3738 3739 3740
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);
3741 3742
		if (status == 0)
			status = NFS_ATTR_FATTR_MTIME;
L
Linus Torvalds 已提交
3743 3744
		bitmap[1] &= ~FATTR4_WORD1_TIME_MODIFY;
	}
3745
	dprintk("%s: mtime=%ld\n", __func__, (long)time->tv_sec);
L
Linus Torvalds 已提交
3746 3747 3748
	return status;
}

A
Al Viro 已提交
3749
static int verify_attr_len(struct xdr_stream *xdr, __be32 *savep, uint32_t attrlen)
L
Linus Torvalds 已提交
3750 3751 3752 3753 3754
{
	unsigned int attrwords = XDR_QUADLEN(attrlen);
	unsigned int nwords = xdr->p - savep;

	if (unlikely(attrwords != nwords)) {
3755 3756
		dprintk("%s: server returned incorrect attribute length: "
			"%u %c %u\n",
3757
				__func__,
L
Linus Torvalds 已提交
3758 3759 3760 3761 3762 3763 3764 3765 3766 3767
				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
3768
	__be32 *p;
L
Linus Torvalds 已提交
3769

B
Benny Halevy 已提交
3770 3771 3772
	p = xdr_inline_decode(xdr, 20);
	if (unlikely(!p))
		goto out_overflow;
B
Benny Halevy 已提交
3773
	cinfo->atomic = be32_to_cpup(p++);
B
Benny Halevy 已提交
3774
	p = xdr_decode_hyper(p, &cinfo->before);
3775
	xdr_decode_hyper(p, &cinfo->after);
L
Linus Torvalds 已提交
3776
	return 0;
B
Benny Halevy 已提交
3777 3778 3779
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
L
Linus Torvalds 已提交
3780 3781 3782 3783
}

static int decode_access(struct xdr_stream *xdr, struct nfs4_accessres *access)
{
A
Al Viro 已提交
3784
	__be32 *p;
L
Linus Torvalds 已提交
3785 3786 3787 3788 3789 3790
	uint32_t supp, acc;
	int status;

	status = decode_op_hdr(xdr, OP_ACCESS);
	if (status)
		return status;
B
Benny Halevy 已提交
3791 3792 3793
	p = xdr_inline_decode(xdr, 8);
	if (unlikely(!p))
		goto out_overflow;
B
Benny Halevy 已提交
3794
	supp = be32_to_cpup(p++);
3795
	acc = be32_to_cpup(p);
L
Linus Torvalds 已提交
3796 3797 3798
	access->supported = supp;
	access->access = acc;
	return 0;
B
Benny Halevy 已提交
3799 3800 3801
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
L
Linus Torvalds 已提交
3802 3803
}

3804
static int decode_opaque_fixed(struct xdr_stream *xdr, void *buf, size_t len)
L
Linus Torvalds 已提交
3805
{
A
Al Viro 已提交
3806
	__be32 *p;
3807 3808 3809 3810 3811 3812 3813 3814 3815 3816 3817 3818 3819 3820 3821 3822 3823

	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
3824 3825 3826
	int status;

	status = decode_op_hdr(xdr, OP_CLOSE);
3827 3828
	if (status != -EIO)
		nfs_increment_open_seqid(status, res->seqid);
3829 3830 3831
	if (!status)
		status = decode_stateid(xdr, &res->stateid);
	return status;
L
Linus Torvalds 已提交
3832 3833
}

3834 3835 3836
static int decode_verifier(struct xdr_stream *xdr, void *verifier)
{
	return decode_opaque_fixed(xdr, verifier, 8);
L
Linus Torvalds 已提交
3837 3838 3839 3840 3841 3842 3843
}

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

	status = decode_op_hdr(xdr, OP_COMMIT);
3844 3845 3846
	if (!status)
		status = decode_verifier(xdr, res->verf->verifier);
	return status;
L
Linus Torvalds 已提交
3847 3848 3849 3850
}

static int decode_create(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
{
A
Al Viro 已提交
3851
	__be32 *p;
L
Linus Torvalds 已提交
3852 3853 3854 3855 3856 3857 3858 3859
	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
3860 3861 3862
	p = xdr_inline_decode(xdr, 4);
	if (unlikely(!p))
		goto out_overflow;
3863
	bmlen = be32_to_cpup(p);
B
Benny Halevy 已提交
3864 3865 3866 3867 3868 3869
	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
3870 3871 3872 3873
}

static int decode_server_caps(struct xdr_stream *xdr, struct nfs4_server_caps_res *res)
{
A
Al Viro 已提交
3874
	__be32 *savep;
3875
	uint32_t attrlen, bitmap[2] = {0};
L
Linus Torvalds 已提交
3876 3877 3878 3879 3880 3881 3882 3883 3884 3885 3886 3887 3888 3889 3890 3891 3892 3893
	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:
3894
	dprintk("%s: xdr returned %d!\n", __func__, -status);
L
Linus Torvalds 已提交
3895 3896
	return status;
}
3897

L
Linus Torvalds 已提交
3898 3899
static int decode_statfs(struct xdr_stream *xdr, struct nfs_fsstat *fsstat)
{
A
Al Viro 已提交
3900
	__be32 *savep;
3901
	uint32_t attrlen, bitmap[2] = {0};
L
Linus Torvalds 已提交
3902
	int status;
3903

L
Linus Torvalds 已提交
3904 3905 3906 3907 3908 3909 3910 3911 3912 3913 3914 3915 3916 3917 3918 3919 3920 3921 3922 3923 3924 3925
	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:
3926
	dprintk("%s: xdr returned %d!\n", __func__, -status);
L
Linus Torvalds 已提交
3927 3928 3929 3930 3931
	return status;
}

static int decode_pathconf(struct xdr_stream *xdr, struct nfs_pathconf *pathconf)
{
A
Al Viro 已提交
3932
	__be32 *savep;
3933
	uint32_t attrlen, bitmap[2] = {0};
L
Linus Torvalds 已提交
3934
	int status;
3935

L
Linus Torvalds 已提交
3936 3937 3938 3939 3940 3941 3942 3943 3944 3945 3946 3947 3948 3949
	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:
3950
	dprintk("%s: xdr returned %d!\n", __func__, -status);
L
Linus Torvalds 已提交
3951 3952 3953
	return status;
}

3954 3955
static int decode_getfattr_attrs(struct xdr_stream *xdr, uint32_t *bitmap,
		struct nfs_fattr *fattr, struct nfs_fh *fh,
3956
		const struct nfs_server *server, int may_sleep)
L
Linus Torvalds 已提交
3957
{
3958 3959
	int status;
	umode_t fmode = 0;
3960
	uint64_t fileid;
3961
	uint32_t type;
L
Linus Torvalds 已提交
3962

3963 3964
	status = decode_attr_type(xdr, bitmap, &type);
	if (status < 0)
L
Linus Torvalds 已提交
3965
		goto xdr_error;
3966 3967 3968 3969 3970
	fattr->mode = 0;
	if (status != 0) {
		fattr->mode |= nfs_type2fmt[type];
		fattr->valid |= status;
	}
L
Linus Torvalds 已提交
3971

3972 3973
	status = decode_attr_change(xdr, bitmap, &fattr->change_attr);
	if (status < 0)
L
Linus Torvalds 已提交
3974
		goto xdr_error;
3975
	fattr->valid |= status;
3976 3977 3978

	status = decode_attr_size(xdr, bitmap, &fattr->size);
	if (status < 0)
L
Linus Torvalds 已提交
3979
		goto xdr_error;
3980
	fattr->valid |= status;
3981 3982 3983

	status = decode_attr_fsid(xdr, bitmap, &fattr->fsid);
	if (status < 0)
L
Linus Torvalds 已提交
3984
		goto xdr_error;
3985
	fattr->valid |= status;
3986

3987 3988 3989 3990 3991 3992 3993 3994
	status = decode_attr_error(xdr, bitmap);
	if (status < 0)
		goto xdr_error;

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

3995 3996
	status = decode_attr_fileid(xdr, bitmap, &fattr->fileid);
	if (status < 0)
L
Linus Torvalds 已提交
3997
		goto xdr_error;
3998
	fattr->valid |= status;
3999 4000

	status = decode_attr_fs_locations(xdr, bitmap, container_of(fattr,
4001
						struct nfs4_fs_locations,
4002 4003
						fattr));
	if (status < 0)
4004
		goto xdr_error;
4005
	fattr->valid |= status;
4006 4007 4008

	status = decode_attr_mode(xdr, bitmap, &fmode);
	if (status < 0)
L
Linus Torvalds 已提交
4009
		goto xdr_error;
4010 4011 4012 4013
	if (status != 0) {
		fattr->mode |= fmode;
		fattr->valid |= status;
	}
4014 4015 4016

	status = decode_attr_nlink(xdr, bitmap, &fattr->nlink);
	if (status < 0)
L
Linus Torvalds 已提交
4017
		goto xdr_error;
4018
	fattr->valid |= status;
4019

4020 4021
	status = decode_attr_owner(xdr, bitmap, server->nfs_client,
			&fattr->uid, may_sleep);
4022
	if (status < 0)
L
Linus Torvalds 已提交
4023
		goto xdr_error;
4024
	fattr->valid |= status;
4025

4026 4027
	status = decode_attr_group(xdr, bitmap, server->nfs_client,
			&fattr->gid, may_sleep);
4028
	if (status < 0)
L
Linus Torvalds 已提交
4029
		goto xdr_error;
4030
	fattr->valid |= status;
4031 4032 4033

	status = decode_attr_rdev(xdr, bitmap, &fattr->rdev);
	if (status < 0)
L
Linus Torvalds 已提交
4034
		goto xdr_error;
4035
	fattr->valid |= status;
4036 4037 4038

	status = decode_attr_space_used(xdr, bitmap, &fattr->du.nfs3.used);
	if (status < 0)
L
Linus Torvalds 已提交
4039
		goto xdr_error;
4040
	fattr->valid |= status;
4041 4042 4043

	status = decode_attr_time_access(xdr, bitmap, &fattr->atime);
	if (status < 0)
L
Linus Torvalds 已提交
4044
		goto xdr_error;
4045
	fattr->valid |= status;
4046 4047 4048

	status = decode_attr_time_metadata(xdr, bitmap, &fattr->ctime);
	if (status < 0)
L
Linus Torvalds 已提交
4049
		goto xdr_error;
4050
	fattr->valid |= status;
4051 4052 4053

	status = decode_attr_time_modify(xdr, bitmap, &fattr->mtime);
	if (status < 0)
L
Linus Torvalds 已提交
4054
		goto xdr_error;
4055
	fattr->valid |= status;
4056 4057 4058

	status = decode_attr_mounted_on_fileid(xdr, bitmap, &fileid);
	if (status < 0)
4059
		goto xdr_error;
4060
	if (status != 0 && !(fattr->valid & status)) {
4061
		fattr->fileid = fileid;
4062 4063
		fattr->valid |= status;
	}
4064

4065 4066 4067 4068 4069 4070 4071 4072 4073 4074 4075 4076 4077 4078 4079 4080 4081 4082 4083 4084 4085 4086 4087 4088 4089 4090 4091 4092 4093
xdr_error:
	dprintk("%s: xdr returned %d\n", __func__, -status);
	return status;
}

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

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

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

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

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

4094
	status = verify_attr_len(xdr, savep, attrlen);
L
Linus Torvalds 已提交
4095
xdr_error:
4096
	dprintk("%s: xdr returned %d\n", __func__, -status);
L
Linus Torvalds 已提交
4097 4098 4099
	return status;
}

4100 4101 4102 4103 4104
static int decode_getfattr(struct xdr_stream *xdr, struct nfs_fattr *fattr,
		const struct nfs_server *server, int may_sleep)
{
	return decode_getfattr_generic(xdr, fattr, NULL, server, may_sleep);
}
L
Linus Torvalds 已提交
4105

4106 4107 4108 4109 4110 4111 4112 4113 4114 4115 4116 4117 4118 4119 4120 4121 4122 4123 4124 4125 4126 4127 4128 4129 4130 4131 4132 4133 4134 4135 4136 4137 4138 4139 4140 4141 4142 4143 4144 4145 4146 4147 4148 4149 4150 4151 4152 4153 4154 4155 4156 4157 4158 4159 4160
/*
 * Decode potentially multiple layout types. Currently we only support
 * one layout driver per file system.
 */
static int decode_first_pnfs_layout_type(struct xdr_stream *xdr,
					 uint32_t *layouttype)
{
	uint32_t *p;
	int num;

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

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

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

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

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

L
Linus Torvalds 已提交
4161 4162
static int decode_fsinfo(struct xdr_stream *xdr, struct nfs_fsinfo *fsinfo)
{
A
Al Viro 已提交
4163
	__be32 *savep;
L
Linus Torvalds 已提交
4164 4165 4166 4167 4168 4169 4170 4171 4172 4173 4174 4175 4176 4177 4178 4179 4180 4181 4182 4183 4184 4185
	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;
4186
	status = decode_attr_time_delta(xdr, bitmap, &fsinfo->time_delta);
4187 4188 4189
	if (status != 0)
		goto xdr_error;
	status = decode_attr_pnfstype(xdr, bitmap, &fsinfo->layouttype);
4190 4191
	if (status != 0)
		goto xdr_error;
L
Linus Torvalds 已提交
4192 4193 4194

	status = verify_attr_len(xdr, savep, attrlen);
xdr_error:
4195
	dprintk("%s: xdr returned %d!\n", __func__, -status);
L
Linus Torvalds 已提交
4196 4197 4198 4199 4200
	return status;
}

static int decode_getfh(struct xdr_stream *xdr, struct nfs_fh *fh)
{
A
Al Viro 已提交
4201
	__be32 *p;
L
Linus Torvalds 已提交
4202 4203 4204
	uint32_t len;
	int status;

4205 4206 4207
	/* Zero handle first to allow comparisons */
	memset(fh, 0, sizeof(*fh));

L
Linus Torvalds 已提交
4208 4209 4210 4211
	status = decode_op_hdr(xdr, OP_GETFH);
	if (status)
		return status;

B
Benny Halevy 已提交
4212 4213 4214
	p = xdr_inline_decode(xdr, 4);
	if (unlikely(!p))
		goto out_overflow;
4215
	len = be32_to_cpup(p);
L
Linus Torvalds 已提交
4216 4217 4218
	if (len > NFS4_FHSIZE)
		return -EIO;
	fh->size = len;
B
Benny Halevy 已提交
4219 4220 4221
	p = xdr_inline_decode(xdr, len);
	if (unlikely(!p))
		goto out_overflow;
B
Benny Halevy 已提交
4222
	memcpy(fh->data, p, len);
L
Linus Torvalds 已提交
4223
	return 0;
B
Benny Halevy 已提交
4224 4225 4226
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
L
Linus Torvalds 已提交
4227 4228 4229 4230 4231
}

static int decode_link(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
{
	int status;
4232

L
Linus Torvalds 已提交
4233 4234 4235 4236 4237 4238 4239 4240 4241
	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
4242
static int decode_lock_denied (struct xdr_stream *xdr, struct file_lock *fl)
L
Linus Torvalds 已提交
4243
{
T
Trond Myklebust 已提交
4244
	uint64_t offset, length, clientid;
A
Al Viro 已提交
4245
	__be32 *p;
T
Trond Myklebust 已提交
4246
	uint32_t namelen, type;
L
Linus Torvalds 已提交
4247

4248
	p = xdr_inline_decode(xdr, 32); /* read 32 bytes */
B
Benny Halevy 已提交
4249 4250
	if (unlikely(!p))
		goto out_overflow;
4251
	p = xdr_decode_hyper(p, &offset); /* read 2 8-byte long words */
B
Benny Halevy 已提交
4252
	p = xdr_decode_hyper(p, &length);
4253 4254
	type = be32_to_cpup(p++); /* 4 byte read */
	if (fl != NULL) { /* manipulate file lock */
T
Trond Myklebust 已提交
4255 4256 4257 4258 4259 4260 4261 4262 4263
		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;
	}
4264 4265 4266
	p = xdr_decode_hyper(p, &clientid); /* read 8 bytes */
	namelen = be32_to_cpup(p); /* read 4 bytes */  /* have read all 32 bytes now */
	p = xdr_inline_decode(xdr, namelen); /* variable size field */
B
Benny Halevy 已提交
4267 4268 4269 4270 4271
	if (likely(p))
		return -NFS4ERR_DENIED;
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
L
Linus Torvalds 已提交
4272 4273
}

T
Trond Myklebust 已提交
4274
static int decode_lock(struct xdr_stream *xdr, struct nfs_lock_res *res)
L
Linus Torvalds 已提交
4275 4276 4277 4278
{
	int status;

	status = decode_op_hdr(xdr, OP_LOCK);
4279 4280
	if (status == -EIO)
		goto out;
L
Linus Torvalds 已提交
4281
	if (status == 0) {
4282 4283 4284
		status = decode_stateid(xdr, &res->stateid);
		if (unlikely(status))
			goto out;
L
Linus Torvalds 已提交
4285
	} else if (status == -NFS4ERR_DENIED)
4286 4287 4288 4289 4290
		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
4291 4292 4293
	return status;
}

T
Trond Myklebust 已提交
4294
static int decode_lockt(struct xdr_stream *xdr, struct nfs_lockt_res *res)
L
Linus Torvalds 已提交
4295 4296 4297 4298
{
	int status;
	status = decode_op_hdr(xdr, OP_LOCKT);
	if (status == -NFS4ERR_DENIED)
T
Trond Myklebust 已提交
4299
		return decode_lock_denied(xdr, res->denied);
L
Linus Torvalds 已提交
4300 4301 4302
	return status;
}

T
Trond Myklebust 已提交
4303
static int decode_locku(struct xdr_stream *xdr, struct nfs_locku_res *res)
L
Linus Torvalds 已提交
4304 4305 4306 4307
{
	int status;

	status = decode_op_hdr(xdr, OP_LOCKU);
4308 4309
	if (status != -EIO)
		nfs_increment_lock_seqid(status, res->seqid);
4310 4311
	if (status == 0)
		status = decode_stateid(xdr, &res->stateid);
L
Linus Torvalds 已提交
4312 4313 4314
	return status;
}

4315 4316 4317 4318 4319
static int decode_release_lockowner(struct xdr_stream *xdr)
{
	return decode_op_hdr(xdr, OP_RELEASE_LOCKOWNER);
}

L
Linus Torvalds 已提交
4320 4321 4322 4323 4324 4325 4326 4327
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
4328
	__be32 *p;
L
Linus Torvalds 已提交
4329 4330
	uint32_t limit_type, nblocks, blocksize;

B
Benny Halevy 已提交
4331 4332 4333
	p = xdr_inline_decode(xdr, 12);
	if (unlikely(!p))
		goto out_overflow;
B
Benny Halevy 已提交
4334
	limit_type = be32_to_cpup(p++);
L
Linus Torvalds 已提交
4335
	switch (limit_type) {
A
Andy Adamson 已提交
4336
	case 1:
4337
		xdr_decode_hyper(p, maxsize);
A
Andy Adamson 已提交
4338 4339
		break;
	case 2:
B
Benny Halevy 已提交
4340
		nblocks = be32_to_cpup(p++);
4341
		blocksize = be32_to_cpup(p);
A
Andy Adamson 已提交
4342
		*maxsize = (uint64_t)nblocks * (uint64_t)blocksize;
L
Linus Torvalds 已提交
4343 4344
	}
	return 0;
B
Benny Halevy 已提交
4345 4346 4347
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
L
Linus Torvalds 已提交
4348 4349 4350 4351
}

static int decode_delegation(struct xdr_stream *xdr, struct nfs_openres *res)
{
A
Andy Adamson 已提交
4352 4353
	__be32 *p;
	uint32_t delegation_type;
4354
	int status;
L
Linus Torvalds 已提交
4355

B
Benny Halevy 已提交
4356 4357 4358
	p = xdr_inline_decode(xdr, 4);
	if (unlikely(!p))
		goto out_overflow;
4359
	delegation_type = be32_to_cpup(p);
L
Linus Torvalds 已提交
4360 4361 4362 4363
	if (delegation_type == NFS4_OPEN_DELEGATE_NONE) {
		res->delegation_type = 0;
		return 0;
	}
4364 4365 4366
	status = decode_stateid(xdr, &res->delegation);
	if (unlikely(status))
		return status;
B
Benny Halevy 已提交
4367 4368 4369
	p = xdr_inline_decode(xdr, 4);
	if (unlikely(!p))
		goto out_overflow;
4370
	res->do_recall = be32_to_cpup(p);
A
Andy Adamson 已提交
4371

L
Linus Torvalds 已提交
4372
	switch (delegation_type) {
A
Andy Adamson 已提交
4373 4374 4375 4376 4377 4378
	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
4379 4380
				return -EIO;
	}
4381
	return decode_ace(xdr, NULL, res->server->nfs_client);
B
Benny Halevy 已提交
4382 4383 4384
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
L
Linus Torvalds 已提交
4385 4386 4387 4388
}

static int decode_open(struct xdr_stream *xdr, struct nfs_openres *res)
{
A
Andy Adamson 已提交
4389
	__be32 *p;
4390
	uint32_t savewords, bmlen, i;
A
Andy Adamson 已提交
4391
	int status;
L
Linus Torvalds 已提交
4392

A
Andy Adamson 已提交
4393
	status = decode_op_hdr(xdr, OP_OPEN);
4394 4395
	if (status != -EIO)
		nfs_increment_open_seqid(status, res->seqid);
4396 4397 4398
	if (!status)
		status = decode_stateid(xdr, &res->stateid);
	if (unlikely(status))
A
Andy Adamson 已提交
4399
		return status;
L
Linus Torvalds 已提交
4400

A
Andy Adamson 已提交
4401
	decode_change_info(xdr, &res->cinfo);
L
Linus Torvalds 已提交
4402

B
Benny Halevy 已提交
4403 4404 4405
	p = xdr_inline_decode(xdr, 8);
	if (unlikely(!p))
		goto out_overflow;
B
Benny Halevy 已提交
4406
	res->rflags = be32_to_cpup(p++);
4407
	bmlen = be32_to_cpup(p);
A
Andy Adamson 已提交
4408 4409
	if (bmlen > 10)
		goto xdr_error;
L
Linus Torvalds 已提交
4410

B
Benny Halevy 已提交
4411 4412 4413
	p = xdr_inline_decode(xdr, bmlen << 2);
	if (unlikely(!p))
		goto out_overflow;
4414 4415
	savewords = min_t(uint32_t, bmlen, NFS4_BITMAP_SIZE);
	for (i = 0; i < savewords; ++i)
B
Benny Halevy 已提交
4416
		res->attrset[i] = be32_to_cpup(p++);
4417 4418 4419
	for (; i < NFS4_BITMAP_SIZE; i++)
		res->attrset[i] = 0;

L
Linus Torvalds 已提交
4420 4421
	return decode_delegation(xdr, res);
xdr_error:
4422
	dprintk("%s: Bitmap too large! Length = %u\n", __func__, bmlen);
L
Linus Torvalds 已提交
4423
	return -EIO;
B
Benny Halevy 已提交
4424 4425 4426
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
L
Linus Torvalds 已提交
4427 4428 4429 4430 4431 4432
}

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

A
Andy Adamson 已提交
4433
	status = decode_op_hdr(xdr, OP_OPEN_CONFIRM);
4434 4435
	if (status != -EIO)
		nfs_increment_open_seqid(status, res->seqid);
4436 4437 4438
	if (!status)
		status = decode_stateid(xdr, &res->stateid);
	return status;
L
Linus Torvalds 已提交
4439 4440 4441 4442 4443 4444 4445
}

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

	status = decode_op_hdr(xdr, OP_OPEN_DOWNGRADE);
4446 4447
	if (status != -EIO)
		nfs_increment_open_seqid(status, res->seqid);
4448 4449 4450
	if (!status)
		status = decode_stateid(xdr, &res->stateid);
	return status;
L
Linus Torvalds 已提交
4451 4452 4453 4454 4455 4456 4457 4458 4459 4460 4461 4462 4463 4464 4465
}

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
4466
	__be32 *p;
L
Linus Torvalds 已提交
4467 4468 4469 4470 4471 4472
	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
4473 4474 4475
	p = xdr_inline_decode(xdr, 8);
	if (unlikely(!p))
		goto out_overflow;
B
Benny Halevy 已提交
4476
	eof = be32_to_cpup(p++);
4477
	count = be32_to_cpup(p);
4478
	hdrlen = (u8 *) xdr->p - (u8 *) iov->iov_base;
L
Linus Torvalds 已提交
4479 4480
	recvd = req->rq_rcv_buf.len - hdrlen;
	if (count > recvd) {
4481
		dprintk("NFS: server cheating in read reply: "
L
Linus Torvalds 已提交
4482 4483 4484 4485 4486 4487 4488 4489
				"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
4490 4491 4492
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
L
Linus Torvalds 已提交
4493 4494 4495 4496 4497 4498
}

static int decode_readdir(struct xdr_stream *xdr, struct rpc_rqst *req, struct nfs4_readdir_res *readdir)
{
	struct xdr_buf	*rcvbuf = &req->rq_rcv_buf;
	struct kvec	*iov = rcvbuf->head;
4499 4500 4501
	size_t		hdrlen;
	u32		recvd, pglen = rcvbuf->page_len;
	int		status;
L
Linus Torvalds 已提交
4502 4503

	status = decode_op_hdr(xdr, OP_READDIR);
4504 4505 4506
	if (!status)
		status = decode_verifier(xdr, readdir->verifier.data);
	if (unlikely(status))
L
Linus Torvalds 已提交
4507
		return status;
4508 4509
	dprintk("%s: verifier = %08x:%08x\n",
			__func__,
4510 4511 4512
			((u32 *)readdir->verifier.data)[0],
			((u32 *)readdir->verifier.data)[1]);

L
Linus Torvalds 已提交
4513

4514
	hdrlen = (char *) xdr->p - (char *) iov->iov_base;
L
Linus Torvalds 已提交
4515 4516 4517 4518 4519
	recvd = rcvbuf->len - hdrlen;
	if (pglen > recvd)
		pglen = recvd;
	xdr_read_pages(xdr, pglen);

4520

4521
	return pglen;
L
Linus Torvalds 已提交
4522 4523 4524 4525 4526 4527
}

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;
4528 4529
	size_t hdrlen;
	u32 len, recvd;
A
Al Viro 已提交
4530
	__be32 *p;
L
Linus Torvalds 已提交
4531 4532 4533 4534 4535 4536 4537
	int status;

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

	/* Convert length of symlink */
B
Benny Halevy 已提交
4538 4539 4540
	p = xdr_inline_decode(xdr, 4);
	if (unlikely(!p))
		goto out_overflow;
4541
	len = be32_to_cpup(p);
L
Linus Torvalds 已提交
4542
	if (len >= rcvbuf->page_len || len <= 0) {
4543
		dprintk("nfs: server returned giant symlink!\n");
L
Linus Torvalds 已提交
4544 4545 4546 4547 4548
		return -ENAMETOOLONG;
	}
	hdrlen = (char *) xdr->p - (char *) iov->iov_base;
	recvd = req->rq_rcv_buf.len - hdrlen;
	if (recvd < len) {
4549
		dprintk("NFS: server cheating in readlink reply: "
L
Linus Torvalds 已提交
4550 4551 4552 4553 4554 4555 4556 4557 4558 4559 4560
				"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).
	 */
4561
	xdr_terminate_string(rcvbuf, len);
L
Linus Torvalds 已提交
4562
	return 0;
B
Benny Halevy 已提交
4563 4564 4565
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
L
Linus Torvalds 已提交
4566 4567 4568 4569 4570 4571 4572 4573 4574 4575 4576 4577 4578 4579 4580 4581 4582 4583 4584 4585 4586 4587 4588 4589 4590 4591 4592 4593 4594 4595 4596 4597 4598 4599
}

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);
}

4600 4601 4602 4603 4604 4605
static int
decode_restorefh(struct xdr_stream *xdr)
{
	return decode_op_hdr(xdr, OP_RESTOREFH);
}

4606 4607 4608
static int decode_getacl(struct xdr_stream *xdr, struct rpc_rqst *req,
		size_t *acl_len)
{
A
Al Viro 已提交
4609
	__be32 *savep;
4610 4611 4612 4613 4614 4615 4616 4617 4618 4619 4620 4621 4622 4623 4624 4625
	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)) {
4626 4627
		size_t hdrlen;
		u32 recvd;
4628 4629 4630 4631 4632 4633

		/* 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) {
4634
			dprintk("NFS: server cheating in getattr"
4635 4636 4637 4638
					" acl reply: attrlen %u > recvd %u\n",
					attrlen, recvd);
			return -EINVAL;
		}
4639
		xdr_read_pages(xdr, attrlen);
4640
		*acl_len = attrlen;
J
J. Bruce Fields 已提交
4641 4642
	} else
		status = -EOPNOTSUPP;
4643 4644 4645 4646 4647

out:
	return status;
}

L
Linus Torvalds 已提交
4648 4649 4650 4651 4652 4653
static int
decode_savefh(struct xdr_stream *xdr)
{
	return decode_op_hdr(xdr, OP_SAVEFH);
}

4654
static int decode_setattr(struct xdr_stream *xdr)
L
Linus Torvalds 已提交
4655
{
A
Al Viro 已提交
4656
	__be32 *p;
L
Linus Torvalds 已提交
4657 4658 4659 4660 4661 4662
	uint32_t bmlen;
	int status;

	status = decode_op_hdr(xdr, OP_SETATTR);
	if (status)
		return status;
B
Benny Halevy 已提交
4663 4664 4665
	p = xdr_inline_decode(xdr, 4);
	if (unlikely(!p))
		goto out_overflow;
4666
	bmlen = be32_to_cpup(p);
B
Benny Halevy 已提交
4667 4668 4669 4670 4671 4672
	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
4673 4674
}

4675
static int decode_setclientid(struct xdr_stream *xdr, struct nfs4_setclientid_res *res)
L
Linus Torvalds 已提交
4676
{
A
Al Viro 已提交
4677
	__be32 *p;
L
Linus Torvalds 已提交
4678 4679 4680
	uint32_t opnum;
	int32_t nfserr;

B
Benny Halevy 已提交
4681 4682 4683
	p = xdr_inline_decode(xdr, 8);
	if (unlikely(!p))
		goto out_overflow;
B
Benny Halevy 已提交
4684
	opnum = be32_to_cpup(p++);
L
Linus Torvalds 已提交
4685
	if (opnum != OP_SETCLIENTID) {
4686
		dprintk("nfs: decode_setclientid: Server returned operation"
4687
			" %d\n", opnum);
L
Linus Torvalds 已提交
4688 4689
		return -EIO;
	}
4690
	nfserr = be32_to_cpup(p);
L
Linus Torvalds 已提交
4691
	if (nfserr == NFS_OK) {
B
Benny Halevy 已提交
4692 4693 4694
		p = xdr_inline_decode(xdr, 8 + NFS4_VERIFIER_SIZE);
		if (unlikely(!p))
			goto out_overflow;
4695 4696
		p = xdr_decode_hyper(p, &res->clientid);
		memcpy(res->confirm.data, p, NFS4_VERIFIER_SIZE);
L
Linus Torvalds 已提交
4697 4698 4699 4700
	} else if (nfserr == NFSERR_CLID_INUSE) {
		uint32_t len;

		/* skip netid string */
B
Benny Halevy 已提交
4701 4702 4703
		p = xdr_inline_decode(xdr, 4);
		if (unlikely(!p))
			goto out_overflow;
4704
		len = be32_to_cpup(p);
B
Benny Halevy 已提交
4705 4706 4707
		p = xdr_inline_decode(xdr, len);
		if (unlikely(!p))
			goto out_overflow;
L
Linus Torvalds 已提交
4708 4709

		/* skip uaddr string */
B
Benny Halevy 已提交
4710 4711 4712
		p = xdr_inline_decode(xdr, 4);
		if (unlikely(!p))
			goto out_overflow;
4713
		len = be32_to_cpup(p);
B
Benny Halevy 已提交
4714 4715 4716
		p = xdr_inline_decode(xdr, len);
		if (unlikely(!p))
			goto out_overflow;
L
Linus Torvalds 已提交
4717 4718
		return -NFSERR_CLID_INUSE;
	} else
4719
		return nfs4_stat_to_errno(nfserr);
L
Linus Torvalds 已提交
4720 4721

	return 0;
B
Benny Halevy 已提交
4722 4723 4724
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
L
Linus Torvalds 已提交
4725 4726 4727 4728 4729 4730 4731 4732 4733
}

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
4734
	__be32 *p;
L
Linus Torvalds 已提交
4735 4736 4737 4738 4739 4740
	int status;

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

B
Benny Halevy 已提交
4741 4742 4743
	p = xdr_inline_decode(xdr, 16);
	if (unlikely(!p))
		goto out_overflow;
B
Benny Halevy 已提交
4744 4745
	res->count = be32_to_cpup(p++);
	res->verf->committed = be32_to_cpup(p++);
B
Benny Halevy 已提交
4746
	memcpy(res->verf->verifier, p, 8);
L
Linus Torvalds 已提交
4747
	return 0;
B
Benny Halevy 已提交
4748 4749 4750
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
L
Linus Torvalds 已提交
4751 4752 4753 4754 4755 4756 4757
}

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

B
Benny Halevy 已提交
4758 4759 4760 4761 4762 4763
#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;
4764
	char *dummy_str;
B
Benny Halevy 已提交
4765 4766 4767 4768 4769 4770 4771
	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
4772 4773 4774
	p = xdr_inline_decode(xdr, 8);
	if (unlikely(!p))
		goto out_overflow;
4775
	xdr_decode_hyper(p, &clp->cl_ex_clid);
B
Benny Halevy 已提交
4776 4777 4778
	p = xdr_inline_decode(xdr, 12);
	if (unlikely(!p))
		goto out_overflow;
B
Benny Halevy 已提交
4779 4780
	clp->cl_seqid = be32_to_cpup(p++);
	clp->cl_exchange_flags = be32_to_cpup(p++);
B
Benny Halevy 已提交
4781 4782

	/* We ask for SP4_NONE */
4783
	dummy = be32_to_cpup(p);
B
Benny Halevy 已提交
4784 4785 4786 4787
	if (dummy != SP4_NONE)
		return -EIO;

	/* Throw away minor_id */
B
Benny Halevy 已提交
4788 4789 4790
	p = xdr_inline_decode(xdr, 8);
	if (unlikely(!p))
		goto out_overflow;
B
Benny Halevy 已提交
4791 4792

	/* Throw away Major id */
4793 4794 4795
	status = decode_opaque_inline(xdr, &dummy, &dummy_str);
	if (unlikely(status))
		return status;
B
Benny Halevy 已提交
4796 4797

	/* Throw away server_scope */
4798 4799 4800
	status = decode_opaque_inline(xdr, &dummy, &dummy_str);
	if (unlikely(status))
		return status;
B
Benny Halevy 已提交
4801 4802

	/* Throw away Implementation id array */
4803 4804 4805
	status = decode_opaque_inline(xdr, &dummy, &dummy_str);
	if (unlikely(status))
		return status;
B
Benny Halevy 已提交
4806 4807

	return 0;
B
Benny Halevy 已提交
4808 4809 4810
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
B
Benny Halevy 已提交
4811
}
A
Andy Adamson 已提交
4812 4813 4814 4815 4816 4817 4818

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
4819 4820 4821
	p = xdr_inline_decode(xdr, 28);
	if (unlikely(!p))
		goto out_overflow;
B
Benny Halevy 已提交
4822 4823 4824 4825 4826 4827
	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++);
4828
	nr_attrs = be32_to_cpup(p);
A
Andy Adamson 已提交
4829 4830 4831 4832 4833
	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
4834 4835 4836 4837 4838
	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
4839
	return 0;
B
Benny Halevy 已提交
4840 4841 4842
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
A
Andy Adamson 已提交
4843 4844
}

4845 4846 4847
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
4848 4849 4850 4851 4852 4853 4854 4855 4856 4857 4858
}

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);
4859 4860 4861
	if (!status)
		status = decode_sessionid(xdr, &session->sess_id);
	if (unlikely(status))
A
Andy Adamson 已提交
4862 4863 4864
		return status;

	/* seqid, flags */
B
Benny Halevy 已提交
4865 4866 4867
	p = xdr_inline_decode(xdr, 8);
	if (unlikely(!p))
		goto out_overflow;
B
Benny Halevy 已提交
4868
	clp->cl_seqid = be32_to_cpup(p++);
4869
	session->flags = be32_to_cpup(p);
A
Andy Adamson 已提交
4870 4871 4872 4873 4874 4875

	/* 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
4876 4877 4878
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
A
Andy Adamson 已提交
4879
}
A
Andy Adamson 已提交
4880 4881 4882 4883 4884

static int decode_destroy_session(struct xdr_stream *xdr, void *dummy)
{
	return decode_op_hdr(xdr, OP_DESTROY_SESSION);
}
4885 4886 4887 4888 4889

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
4890 4891
#endif /* CONFIG_NFS_V4_1 */

4892 4893 4894 4895 4896
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
4897 4898 4899 4900 4901
	struct nfs4_sessionid id;
	u32 dummy;
	int status;
	__be32 *p;

4902 4903 4904
	if (!res->sr_session)
		return 0;

A
Andy Adamson 已提交
4905
	status = decode_op_hdr(xdr, OP_SEQUENCE);
4906 4907 4908
	if (!status)
		status = decode_sessionid(xdr, &id);
	if (unlikely(status))
A
Andy Adamson 已提交
4909
		goto out_err;
4910

A
Andy Adamson 已提交
4911 4912 4913 4914
	/*
	 * If the server returns different values for sessionID, slotID or
	 * sequence number, the server is looney tunes.
	 */
4915
	status = -EREMOTEIO;
A
Andy Adamson 已提交
4916 4917 4918 4919 4920 4921

	if (memcmp(id.data, res->sr_session->sess_id.data,
		   NFS4_MAX_SESSIONID_LEN)) {
		dprintk("%s Invalid session id\n", __func__);
		goto out_err;
	}
4922

B
Benny Halevy 已提交
4923 4924 4925
	p = xdr_inline_decode(xdr, 20);
	if (unlikely(!p))
		goto out_overflow;
4926

A
Andy Adamson 已提交
4927
	/* seqid */
B
Benny Halevy 已提交
4928
	dummy = be32_to_cpup(p++);
4929
	if (dummy != res->sr_slot->seq_nr) {
A
Andy Adamson 已提交
4930 4931 4932 4933
		dprintk("%s Invalid sequence number\n", __func__);
		goto out_err;
	}
	/* slot id */
B
Benny Halevy 已提交
4934
	dummy = be32_to_cpup(p++);
4935
	if (dummy != res->sr_slot - res->sr_session->fc_slot_table.slots) {
A
Andy Adamson 已提交
4936 4937 4938 4939
		dprintk("%s Invalid slot id\n", __func__);
		goto out_err;
	}
	/* highest slot id - currently not processed */
B
Benny Halevy 已提交
4940
	dummy = be32_to_cpup(p++);
A
Andy Adamson 已提交
4941
	/* target highest slot id - currently not processed */
B
Benny Halevy 已提交
4942
	dummy = be32_to_cpup(p++);
4943 4944
	/* result flags */
	res->sr_status_flags = be32_to_cpup(p);
A
Andy Adamson 已提交
4945 4946 4947 4948
	status = 0;
out_err:
	res->sr_status = status;
	return status;
B
Benny Halevy 已提交
4949 4950 4951 4952
out_overflow:
	print_overflow_msg(__func__, xdr);
	status = -EIO;
	goto out_err;
A
Andy Adamson 已提交
4953
#else  /* CONFIG_NFS_V4_1 */
4954
	return 0;
A
Andy Adamson 已提交
4955
#endif /* CONFIG_NFS_V4_1 */
4956 4957
}

4958 4959 4960 4961 4962 4963 4964 4965 4966 4967 4968 4969 4970 4971 4972 4973 4974 4975 4976 4977 4978 4979 4980 4981 4982 4983 4984 4985 4986 4987 4988 4989 4990 4991 4992 4993 4994 4995 4996 4997 4998 4999 5000 5001 5002 5003 5004 5005 5006 5007 5008 5009 5010 5011 5012 5013 5014 5015 5016 5017 5018 5019 5020 5021 5022 5023 5024 5025 5026 5027 5028 5029 5030 5031 5032 5033 5034 5035 5036 5037 5038 5039 5040 5041 5042 5043 5044 5045 5046 5047 5048 5049 5050 5051 5052 5053 5054 5055 5056 5057 5058 5059 5060 5061 5062 5063 5064 5065 5066 5067 5068 5069 5070 5071 5072 5073 5074 5075 5076 5077 5078 5079 5080 5081 5082 5083 5084 5085
#if defined(CONFIG_NFS_V4_1)

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

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

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

	/* Parse notification bitmap, verifying that it is zero. */
	p = xdr_inline_decode(xdr, 4);
	if (unlikely(!p))
		goto out_overflow;
	len = be32_to_cpup(p);
	if (len) {
		int i;

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

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

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

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

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

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

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

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

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

5086 5087 5088 5089
/*
 * END OF "GENERIC" DECODE ROUTINES.
 */

L
Linus Torvalds 已提交
5090 5091 5092
/*
 * Decode OPEN_DOWNGRADE response
 */
A
Al Viro 已提交
5093
static int nfs4_xdr_dec_open_downgrade(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_open_downgrade(&xdr, res);
5110 5111
	if (status != 0)
		goto out;
5112 5113
	decode_getfattr(&xdr, res->fattr, res->server,
			!RPC_IS_ASYNC(rqstp->rq_task));
L
Linus Torvalds 已提交
5114
out:
A
Andy Adamson 已提交
5115
	return status;
L
Linus Torvalds 已提交
5116 5117 5118 5119 5120
}

/*
 * Decode ACCESS response
 */
A
Al Viro 已提交
5121
static int nfs4_xdr_dec_access(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_accessres *res)
L
Linus Torvalds 已提交
5122 5123 5124 5125
{
	struct xdr_stream xdr;
	struct compound_hdr hdr;
	int status;
5126

L
Linus Torvalds 已提交
5127
	xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5128 5129 5130 5131 5132
	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
5133
		goto out;
5134 5135 5136 5137 5138 5139
	status = decode_putfh(&xdr);
	if (status != 0)
		goto out;
	status = decode_access(&xdr, res);
	if (status != 0)
		goto out;
5140 5141
	decode_getfattr(&xdr, res->fattr, res->server,
			!RPC_IS_ASYNC(rqstp->rq_task));
L
Linus Torvalds 已提交
5142 5143 5144 5145 5146 5147 5148
out:
	return status;
}

/*
 * Decode LOOKUP response
 */
A
Al Viro 已提交
5149
static int nfs4_xdr_dec_lookup(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_lookup_res *res)
L
Linus Torvalds 已提交
5150 5151 5152 5153
{
	struct xdr_stream xdr;
	struct compound_hdr hdr;
	int status;
5154

L
Linus Torvalds 已提交
5155
	xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5156 5157 5158 5159 5160
	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
5161 5162 5163 5164 5165 5166 5167
		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;
5168 5169
	status = decode_getfattr(&xdr, res->fattr, res->server
			,!RPC_IS_ASYNC(rqstp->rq_task));
L
Linus Torvalds 已提交
5170 5171 5172 5173 5174 5175 5176
out:
	return status;
}

/*
 * Decode LOOKUP_ROOT response
 */
A
Al Viro 已提交
5177
static int nfs4_xdr_dec_lookup_root(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_lookup_res *res)
L
Linus Torvalds 已提交
5178 5179 5180 5181
{
	struct xdr_stream xdr;
	struct compound_hdr hdr;
	int status;
5182

L
Linus Torvalds 已提交
5183
	xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5184 5185 5186 5187 5188
	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
5189 5190 5191 5192
		goto out;
	if ((status = decode_putrootfh(&xdr)) != 0)
		goto out;
	if ((status = decode_getfh(&xdr, res->fh)) == 0)
5193 5194
		status = decode_getfattr(&xdr, res->fattr, res->server,
				!RPC_IS_ASYNC(rqstp->rq_task));
L
Linus Torvalds 已提交
5195 5196 5197 5198 5199 5200 5201
out:
	return status;
}

/*
 * Decode REMOVE response
 */
5202
static int nfs4_xdr_dec_remove(struct rpc_rqst *rqstp, __be32 *p, struct nfs_removeres *res)
L
Linus Torvalds 已提交
5203 5204 5205 5206
{
	struct xdr_stream xdr;
	struct compound_hdr hdr;
	int status;
5207

L
Linus Torvalds 已提交
5208
	xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5209 5210 5211 5212 5213
	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
5214
		goto out;
5215 5216 5217 5218
	if ((status = decode_putfh(&xdr)) != 0)
		goto out;
	if ((status = decode_remove(&xdr, &res->cinfo)) != 0)
		goto out;
5219
	decode_getfattr(&xdr, res->dir_attr, res->server,
5220
			!RPC_IS_ASYNC(rqstp->rq_task));
L
Linus Torvalds 已提交
5221 5222 5223 5224 5225 5226 5227
out:
	return status;
}

/*
 * Decode RENAME response
 */
5228
static int nfs4_xdr_dec_rename(struct rpc_rqst *rqstp, __be32 *p, struct nfs_renameres *res)
L
Linus Torvalds 已提交
5229 5230 5231 5232
{
	struct xdr_stream xdr;
	struct compound_hdr hdr;
	int status;
5233

L
Linus Torvalds 已提交
5234
	xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5235 5236 5237 5238 5239
	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
5240 5241 5242 5243 5244 5245 5246
		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;
5247 5248 5249
	if ((status = decode_rename(&xdr, &res->old_cinfo, &res->new_cinfo)) != 0)
		goto out;
	/* Current FH is target directory */
5250 5251
	if (decode_getfattr(&xdr, res->new_fattr, res->server,
				!RPC_IS_ASYNC(rqstp->rq_task)) != 0)
5252 5253 5254
		goto out;
	if ((status = decode_restorefh(&xdr)) != 0)
		goto out;
5255 5256
	decode_getfattr(&xdr, res->old_fattr, res->server,
			!RPC_IS_ASYNC(rqstp->rq_task));
L
Linus Torvalds 已提交
5257 5258 5259 5260 5261 5262 5263
out:
	return status;
}

/*
 * Decode LINK response
 */
A
Al Viro 已提交
5264
static int nfs4_xdr_dec_link(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_link_res *res)
L
Linus Torvalds 已提交
5265 5266 5267 5268
{
	struct xdr_stream xdr;
	struct compound_hdr hdr;
	int status;
5269

L
Linus Torvalds 已提交
5270
	xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5271 5272 5273 5274 5275
	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
5276 5277 5278 5279 5280 5281 5282
		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;
5283 5284 5285 5286 5287 5288
	if ((status = decode_link(&xdr, &res->cinfo)) != 0)
		goto out;
	/*
	 * Note order: OP_LINK leaves the directory as the current
	 *             filehandle.
	 */
5289 5290
	if (decode_getfattr(&xdr, res->dir_attr, res->server,
				!RPC_IS_ASYNC(rqstp->rq_task)) != 0)
5291 5292 5293
		goto out;
	if ((status = decode_restorefh(&xdr)) != 0)
		goto out;
5294 5295
	decode_getfattr(&xdr, res->fattr, res->server,
			!RPC_IS_ASYNC(rqstp->rq_task));
L
Linus Torvalds 已提交
5296 5297 5298 5299 5300 5301 5302
out:
	return status;
}

/*
 * Decode CREATE response
 */
A
Al Viro 已提交
5303
static int nfs4_xdr_dec_create(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_create_res *res)
L
Linus Torvalds 已提交
5304 5305 5306 5307
{
	struct xdr_stream xdr;
	struct compound_hdr hdr;
	int status;
5308

L
Linus Torvalds 已提交
5309
	xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5310 5311 5312 5313 5314
	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
5315 5316 5317
		goto out;
	if ((status = decode_putfh(&xdr)) != 0)
		goto out;
5318 5319
	if ((status = decode_savefh(&xdr)) != 0)
		goto out;
L
Linus Torvalds 已提交
5320 5321 5322 5323
	if ((status = decode_create(&xdr,&res->dir_cinfo)) != 0)
		goto out;
	if ((status = decode_getfh(&xdr, res->fh)) != 0)
		goto out;
5324 5325
	if (decode_getfattr(&xdr, res->fattr, res->server,
				!RPC_IS_ASYNC(rqstp->rq_task)) != 0)
5326 5327 5328
		goto out;
	if ((status = decode_restorefh(&xdr)) != 0)
		goto out;
5329 5330
	decode_getfattr(&xdr, res->dir_fattr, res->server,
			!RPC_IS_ASYNC(rqstp->rq_task));
L
Linus Torvalds 已提交
5331 5332 5333 5334 5335 5336 5337
out:
	return status;
}

/*
 * Decode SYMLINK response
 */
A
Al Viro 已提交
5338
static int nfs4_xdr_dec_symlink(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_create_res *res)
L
Linus Torvalds 已提交
5339 5340 5341 5342 5343 5344 5345
{
	return nfs4_xdr_dec_create(rqstp, p, res);
}

/*
 * Decode GETATTR response
 */
A
Al Viro 已提交
5346
static int nfs4_xdr_dec_getattr(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_getattr_res *res)
L
Linus Torvalds 已提交
5347 5348 5349 5350
{
	struct xdr_stream xdr;
	struct compound_hdr hdr;
	int status;
5351

L
Linus Torvalds 已提交
5352 5353
	xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
	status = decode_compound_hdr(&xdr, &hdr);
5354 5355 5356
	if (status)
		goto out;
	status = decode_sequence(&xdr, &res->seq_res, rqstp);
L
Linus Torvalds 已提交
5357 5358 5359 5360 5361
	if (status)
		goto out;
	status = decode_putfh(&xdr);
	if (status)
		goto out;
5362 5363
	status = decode_getfattr(&xdr, res->fattr, res->server,
			!RPC_IS_ASYNC(rqstp->rq_task));
L
Linus Torvalds 已提交
5364 5365 5366 5367
out:
	return status;
}

5368 5369 5370 5371
/*
 * Encode an SETACL request
 */
static int
A
Al Viro 已提交
5372
nfs4_xdr_enc_setacl(struct rpc_rqst *req, __be32 *p, struct nfs_setaclargs *args)
5373
{
A
Andy Adamson 已提交
5374 5375
	struct xdr_stream xdr;
	struct compound_hdr hdr = {
5376
		.minorversion = nfs4_xdr_minorversion(&args->seq_args),
A
Andy Adamson 已提交
5377 5378 5379 5380
	};
	int status;

	xdr_init_encode(&xdr, &req->rq_snd_buf, p);
5381
	encode_compound_hdr(&xdr, req, &hdr);
5382
	encode_sequence(&xdr, &args->seq_args, &hdr);
5383
	encode_putfh(&xdr, args->fh, &hdr);
5384 5385
	status = encode_setacl(&xdr, args, &hdr);
	encode_nops(&hdr);
A
Andy Adamson 已提交
5386
	return status;
5387
}
A
Andy Adamson 已提交
5388

5389 5390 5391 5392
/*
 * Decode SETACL response
 */
static int
B
Benny Halevy 已提交
5393 5394
nfs4_xdr_dec_setacl(struct rpc_rqst *rqstp, __be32 *p,
		    struct nfs_setaclres *res)
5395 5396 5397 5398 5399 5400 5401
{
	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);
5402 5403 5404
	if (status)
		goto out;
	status = decode_sequence(&xdr, &res->seq_res, rqstp);
5405 5406 5407 5408 5409
	if (status)
		goto out;
	status = decode_putfh(&xdr);
	if (status)
		goto out;
5410
	status = decode_setattr(&xdr);
5411 5412 5413
out:
	return status;
}
L
Linus Torvalds 已提交
5414

5415 5416 5417 5418
/*
 * Decode GETACL response
 */
static int
B
Benny Halevy 已提交
5419 5420
nfs4_xdr_dec_getacl(struct rpc_rqst *rqstp, __be32 *p,
		    struct nfs_getaclres *res)
5421 5422 5423 5424 5425 5426 5427
{
	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);
5428 5429 5430
	if (status)
		goto out;
	status = decode_sequence(&xdr, &res->seq_res, rqstp);
5431 5432 5433 5434 5435
	if (status)
		goto out;
	status = decode_putfh(&xdr);
	if (status)
		goto out;
B
Benny Halevy 已提交
5436
	status = decode_getacl(&xdr, rqstp, &res->acl_len);
5437 5438 5439 5440 5441

out:
	return status;
}

L
Linus Torvalds 已提交
5442 5443 5444
/*
 * Decode CLOSE response
 */
A
Al Viro 已提交
5445
static int nfs4_xdr_dec_close(struct rpc_rqst *rqstp, __be32 *p, struct nfs_closeres *res)
L
Linus Torvalds 已提交
5446
{
A
Andy Adamson 已提交
5447 5448 5449 5450 5451 5452
	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);
5453 5454 5455
	if (status)
		goto out;
	status = decode_sequence(&xdr, &res->seq_res, rqstp);
A
Andy Adamson 已提交
5456 5457 5458 5459 5460 5461
	if (status)
		goto out;
	status = decode_putfh(&xdr);
	if (status)
		goto out;
	status = decode_close(&xdr, res);
5462 5463 5464 5465 5466 5467 5468 5469
	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.
	 */
5470 5471
	decode_getfattr(&xdr, res->fattr, res->server,
			!RPC_IS_ASYNC(rqstp->rq_task));
L
Linus Torvalds 已提交
5472
out:
A
Andy Adamson 已提交
5473
	return status;
L
Linus Torvalds 已提交
5474 5475 5476 5477 5478
}

/*
 * Decode OPEN response
 */
A
Al Viro 已提交
5479
static int nfs4_xdr_dec_open(struct rpc_rqst *rqstp, __be32 *p, struct nfs_openres *res)
L
Linus Torvalds 已提交
5480
{
A
Andy Adamson 已提交
5481 5482 5483 5484 5485 5486
	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);
5487 5488 5489
	if (status)
		goto out;
	status = decode_sequence(&xdr, &res->seq_res, rqstp);
A
Andy Adamson 已提交
5490 5491 5492 5493 5494 5495 5496 5497 5498
	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);
5499 5500
	if (status)
		goto out;
5501
	if (decode_getfh(&xdr, &res->fh) != 0)
L
Linus Torvalds 已提交
5502
		goto out;
5503 5504
	if (decode_getfattr(&xdr, res->f_attr, res->server,
				!RPC_IS_ASYNC(rqstp->rq_task)) != 0)
5505
		goto out;
5506
	if (decode_restorefh(&xdr) != 0)
5507
		goto out;
5508 5509
	decode_getfattr(&xdr, res->dir_attr, res->server,
			!RPC_IS_ASYNC(rqstp->rq_task));
L
Linus Torvalds 已提交
5510
out:
A
Andy Adamson 已提交
5511
	return status;
L
Linus Torvalds 已提交
5512 5513 5514 5515 5516
}

/*
 * Decode OPEN_CONFIRM response
 */
A
Al Viro 已提交
5517
static int nfs4_xdr_dec_open_confirm(struct rpc_rqst *rqstp, __be32 *p, struct nfs_open_confirmres *res)
L
Linus Torvalds 已提交
5518
{
A
Andy Adamson 已提交
5519 5520 5521 5522 5523 5524 5525 5526 5527 5528 5529 5530
	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
5531
out:
A
Andy Adamson 已提交
5532
	return status;
L
Linus Torvalds 已提交
5533 5534 5535 5536 5537
}

/*
 * Decode OPEN response
 */
A
Al Viro 已提交
5538
static int nfs4_xdr_dec_open_noattr(struct rpc_rqst *rqstp, __be32 *p, struct nfs_openres *res)
L
Linus Torvalds 已提交
5539
{
A
Andy Adamson 已提交
5540 5541 5542 5543 5544 5545
	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);
5546 5547 5548
	if (status)
		goto out;
	status = decode_sequence(&xdr, &res->seq_res, rqstp);
A
Andy Adamson 已提交
5549 5550 5551 5552 5553 5554 5555 5556
	if (status)
		goto out;
	status = decode_putfh(&xdr);
	if (status)
		goto out;
	status = decode_open(&xdr, res);
	if (status)
		goto out;
5557 5558
	decode_getfattr(&xdr, res->f_attr, res->server,
			!RPC_IS_ASYNC(rqstp->rq_task));
L
Linus Torvalds 已提交
5559
out:
A
Andy Adamson 已提交
5560
	return status;
L
Linus Torvalds 已提交
5561 5562 5563 5564 5565
}

/*
 * Decode SETATTR response
 */
A
Al Viro 已提交
5566
static int nfs4_xdr_dec_setattr(struct rpc_rqst *rqstp, __be32 *p, struct nfs_setattrres *res)
L
Linus Torvalds 已提交
5567
{
A
Andy Adamson 已提交
5568 5569 5570 5571 5572 5573
	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);
5574 5575 5576
	if (status)
		goto out;
	status = decode_sequence(&xdr, &res->seq_res, rqstp);
A
Andy Adamson 已提交
5577 5578 5579 5580 5581
	if (status)
		goto out;
	status = decode_putfh(&xdr);
	if (status)
		goto out;
5582
	status = decode_setattr(&xdr);
A
Andy Adamson 已提交
5583 5584
	if (status)
		goto out;
5585 5586
	decode_getfattr(&xdr, res->fattr, res->server,
			!RPC_IS_ASYNC(rqstp->rq_task));
L
Linus Torvalds 已提交
5587
out:
A
Andy Adamson 已提交
5588
	return status;
L
Linus Torvalds 已提交
5589 5590 5591 5592 5593
}

/*
 * Decode LOCK response
 */
A
Al Viro 已提交
5594
static int nfs4_xdr_dec_lock(struct rpc_rqst *rqstp, __be32 *p, struct nfs_lock_res *res)
L
Linus Torvalds 已提交
5595 5596 5597 5598 5599 5600 5601
{
	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);
5602 5603 5604
	if (status)
		goto out;
	status = decode_sequence(&xdr, &res->seq_res, rqstp);
L
Linus Torvalds 已提交
5605 5606 5607 5608 5609 5610 5611 5612 5613 5614 5615 5616 5617
	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
5618
static int nfs4_xdr_dec_lockt(struct rpc_rqst *rqstp, __be32 *p, struct nfs_lockt_res *res)
L
Linus Torvalds 已提交
5619 5620 5621 5622 5623 5624 5625
{
	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);
5626 5627 5628
	if (status)
		goto out;
	status = decode_sequence(&xdr, &res->seq_res, rqstp);
L
Linus Torvalds 已提交
5629 5630 5631 5632 5633 5634 5635 5636 5637 5638 5639 5640 5641
	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
5642
static int nfs4_xdr_dec_locku(struct rpc_rqst *rqstp, __be32 *p, struct nfs_locku_res *res)
L
Linus Torvalds 已提交
5643 5644 5645 5646 5647 5648 5649
{
	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);
5650 5651 5652
	if (status)
		goto out;
	status = decode_sequence(&xdr, &res->seq_res, rqstp);
L
Linus Torvalds 已提交
5653 5654 5655 5656 5657 5658 5659 5660 5661 5662
	if (status)
		goto out;
	status = decode_putfh(&xdr);
	if (status)
		goto out;
	status = decode_locku(&xdr, res);
out:
	return status;
}

5663 5664 5665 5666 5667 5668 5669 5670 5671 5672 5673 5674 5675
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
5676 5677 5678
/*
 * Decode READLINK response
 */
B
Benny Halevy 已提交
5679 5680
static int nfs4_xdr_dec_readlink(struct rpc_rqst *rqstp, __be32 *p,
				 struct nfs4_readlink_res *res)
L
Linus Torvalds 已提交
5681 5682 5683 5684 5685 5686 5687
{
	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);
5688 5689 5690
	if (status)
		goto out;
	status = decode_sequence(&xdr, &res->seq_res, rqstp);
L
Linus Torvalds 已提交
5691 5692 5693 5694 5695 5696 5697 5698 5699 5700 5701 5702 5703
	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
5704
static int nfs4_xdr_dec_readdir(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_readdir_res *res)
L
Linus Torvalds 已提交
5705 5706 5707 5708 5709 5710 5711
{
	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);
5712 5713 5714
	if (status)
		goto out;
	status = decode_sequence(&xdr, &res->seq_res, rqstp);
L
Linus Torvalds 已提交
5715 5716 5717 5718 5719 5720 5721 5722 5723 5724 5725 5726 5727
	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
5728
static int nfs4_xdr_dec_read(struct rpc_rqst *rqstp, __be32 *p, struct nfs_readres *res)
L
Linus Torvalds 已提交
5729 5730 5731 5732 5733 5734 5735
{
	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);
5736 5737 5738
	if (status)
		goto out;
	status = decode_sequence(&xdr, &res->seq_res, rqstp);
L
Linus Torvalds 已提交
5739 5740 5741 5742 5743 5744 5745 5746 5747 5748 5749 5750 5751 5752 5753
	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
5754
static int nfs4_xdr_dec_write(struct rpc_rqst *rqstp, __be32 *p, struct nfs_writeres *res)
L
Linus Torvalds 已提交
5755 5756 5757 5758 5759 5760 5761
{
	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);
5762 5763 5764
	if (status)
		goto out;
	status = decode_sequence(&xdr, &res->seq_res, rqstp);
L
Linus Torvalds 已提交
5765 5766 5767 5768 5769 5770
	if (status)
		goto out;
	status = decode_putfh(&xdr);
	if (status)
		goto out;
	status = decode_write(&xdr, res);
5771 5772
	if (status)
		goto out;
5773 5774
	decode_getfattr(&xdr, res->fattr, res->server,
			!RPC_IS_ASYNC(rqstp->rq_task));
L
Linus Torvalds 已提交
5775 5776 5777 5778 5779 5780 5781 5782 5783
	if (!status)
		status = res->count;
out:
	return status;
}

/*
 * Decode COMMIT response
 */
A
Al Viro 已提交
5784
static int nfs4_xdr_dec_commit(struct rpc_rqst *rqstp, __be32 *p, struct nfs_writeres *res)
L
Linus Torvalds 已提交
5785 5786 5787 5788 5789 5790 5791
{
	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);
5792 5793 5794
	if (status)
		goto out;
	status = decode_sequence(&xdr, &res->seq_res, rqstp);
L
Linus Torvalds 已提交
5795 5796 5797 5798 5799 5800
	if (status)
		goto out;
	status = decode_putfh(&xdr);
	if (status)
		goto out;
	status = decode_commit(&xdr, res);
5801 5802
	if (status)
		goto out;
5803 5804
	decode_getfattr(&xdr, res->fattr, res->server,
			!RPC_IS_ASYNC(rqstp->rq_task));
L
Linus Torvalds 已提交
5805 5806 5807 5808 5809
out:
	return status;
}

/*
5810
 * Decode FSINFO response
L
Linus Torvalds 已提交
5811
 */
B
Benny Halevy 已提交
5812 5813
static int nfs4_xdr_dec_fsinfo(struct rpc_rqst *req, __be32 *p,
			       struct nfs4_fsinfo_res *res)
L
Linus Torvalds 已提交
5814 5815 5816 5817 5818 5819 5820
{
	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);
5821 5822
	if (!status)
		status = decode_sequence(&xdr, &res->seq_res, req);
L
Linus Torvalds 已提交
5823 5824 5825
	if (!status)
		status = decode_putfh(&xdr);
	if (!status)
B
Benny Halevy 已提交
5826
		status = decode_fsinfo(&xdr, res->fsinfo);
L
Linus Torvalds 已提交
5827 5828 5829 5830
	return status;
}

/*
5831
 * Decode PATHCONF response
L
Linus Torvalds 已提交
5832
 */
B
Benny Halevy 已提交
5833 5834
static int nfs4_xdr_dec_pathconf(struct rpc_rqst *req, __be32 *p,
				 struct nfs4_pathconf_res *res)
L
Linus Torvalds 已提交
5835 5836 5837 5838 5839 5840 5841
{
	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);
5842 5843
	if (!status)
		status = decode_sequence(&xdr, &res->seq_res, req);
L
Linus Torvalds 已提交
5844 5845 5846
	if (!status)
		status = decode_putfh(&xdr);
	if (!status)
B
Benny Halevy 已提交
5847
		status = decode_pathconf(&xdr, res->pathconf);
L
Linus Torvalds 已提交
5848 5849 5850 5851
	return status;
}

/*
5852
 * Decode STATFS response
L
Linus Torvalds 已提交
5853
 */
B
Benny Halevy 已提交
5854 5855
static int nfs4_xdr_dec_statfs(struct rpc_rqst *req, __be32 *p,
			       struct nfs4_statfs_res *res)
L
Linus Torvalds 已提交
5856 5857 5858 5859 5860 5861 5862
{
	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);
5863 5864
	if (!status)
		status = decode_sequence(&xdr, &res->seq_res, req);
L
Linus Torvalds 已提交
5865 5866 5867
	if (!status)
		status = decode_putfh(&xdr);
	if (!status)
B
Benny Halevy 已提交
5868
		status = decode_statfs(&xdr, res->fsstat);
L
Linus Torvalds 已提交
5869 5870 5871 5872
	return status;
}

/*
5873
 * Decode GETATTR_BITMAP response
L
Linus Torvalds 已提交
5874
 */
A
Al Viro 已提交
5875
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
5876 5877 5878 5879 5880 5881
{
	struct xdr_stream xdr;
	struct compound_hdr hdr;
	int status;

	xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
5882 5883 5884 5885 5886
	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
5887 5888 5889 5890 5891 5892 5893 5894 5895 5896 5897
		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
5898
static int nfs4_xdr_dec_renew(struct rpc_rqst *rqstp, __be32 *p, void *dummy)
L
Linus Torvalds 已提交
5899 5900 5901 5902 5903 5904 5905 5906 5907 5908 5909 5910 5911
{
	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;
}

/*
5912
 * Decode SETCLIENTID response
L
Linus Torvalds 已提交
5913
 */
A
Al Viro 已提交
5914
static int nfs4_xdr_dec_setclientid(struct rpc_rqst *req, __be32 *p,
5915
		struct nfs4_setclientid_res *res)
L
Linus Torvalds 已提交
5916 5917 5918 5919 5920 5921 5922 5923
{
	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)
5924
		status = decode_setclientid(&xdr, res);
L
Linus Torvalds 已提交
5925 5926 5927 5928
	return status;
}

/*
5929
 * Decode SETCLIENTID_CONFIRM response
L
Linus Torvalds 已提交
5930
 */
A
Al Viro 已提交
5931
static int nfs4_xdr_dec_setclientid_confirm(struct rpc_rqst *req, __be32 *p, struct nfs_fsinfo *fsinfo)
L
Linus Torvalds 已提交
5932 5933 5934 5935 5936 5937 5938 5939 5940 5941 5942 5943 5944 5945 5946 5947 5948
{
	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;
}

/*
5949
 * Decode DELEGRETURN response
L
Linus Torvalds 已提交
5950
 */
A
Al Viro 已提交
5951
static int nfs4_xdr_dec_delegreturn(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_delegreturnres *res)
L
Linus Torvalds 已提交
5952 5953 5954 5955 5956 5957 5958
{
	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);
5959 5960 5961 5962
	if (status)
		goto out;
	status = decode_sequence(&xdr, &res->seq_res, rqstp);
	if (status)
5963 5964 5965 5966 5967
		goto out;
	status = decode_putfh(&xdr);
	if (status != 0)
		goto out;
	status = decode_delegreturn(&xdr);
5968 5969
	if (status != 0)
		goto out;
5970 5971
	decode_getfattr(&xdr, res->fattr, res->server,
			!RPC_IS_ASYNC(rqstp->rq_task));
5972
out:
L
Linus Torvalds 已提交
5973 5974 5975
	return status;
}

5976
/*
5977
 * Decode FS_LOCATIONS response
5978
 */
B
Benny Halevy 已提交
5979 5980
static int nfs4_xdr_dec_fs_locations(struct rpc_rqst *req, __be32 *p,
				     struct nfs4_fs_locations_res *res)
5981 5982 5983 5984 5985 5986 5987
{
	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);
5988 5989 5990 5991
	if (status)
		goto out;
	status = decode_sequence(&xdr, &res->seq_res, req);
	if (status)
5992 5993 5994 5995 5996 5997
		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
5998
	status = decode_getfattr(&xdr, &res->fs_locations->fattr,
5999 6000
				 res->fs_locations->server,
				 !RPC_IS_ASYNC(req->rq_task));
6001 6002 6003 6004
out:
	return status;
}

B
Benny Halevy 已提交
6005 6006
#if defined(CONFIG_NFS_V4_1)
/*
6007
 * Decode EXCHANGE_ID response
B
Benny Halevy 已提交
6008 6009 6010 6011 6012 6013 6014 6015 6016 6017 6018 6019 6020 6021
 */
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
6022

A
Andy Adamson 已提交
6023
/*
6024
 * Decode CREATE_SESSION response
A
Andy Adamson 已提交
6025 6026 6027 6028 6029 6030 6031 6032 6033 6034 6035 6036 6037 6038 6039
 */
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
6040
/*
6041
 * Decode DESTROY_SESSION response
A
Andy Adamson 已提交
6042 6043 6044 6045 6046 6047 6048 6049 6050 6051 6052 6053 6054 6055 6056
 */
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
6057
/*
6058
 * Decode SEQUENCE response
A
Andy Adamson 已提交
6059 6060 6061 6062 6063 6064 6065 6066 6067 6068 6069 6070 6071 6072 6073
 */
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
6074
/*
6075
 * Decode GET_LEASE_TIME response
A
Andy Adamson 已提交
6076 6077 6078 6079 6080 6081 6082 6083 6084 6085 6086 6087 6088 6089 6090 6091 6092 6093
 */
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;
}
6094 6095 6096 6097 6098 6099 6100 6101 6102 6103 6104 6105 6106 6107 6108 6109 6110 6111 6112

/*
 * 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;
}
6113 6114 6115 6116 6117 6118 6119 6120 6121 6122 6123 6124 6125 6126 6127 6128 6129 6130 6131 6132 6133 6134 6135 6136 6137 6138 6139 6140 6141 6142 6143 6144 6145 6146 6147 6148 6149 6150 6151 6152 6153 6154 6155 6156 6157 6158 6159

/*
 * Decode GETDEVINFO response
 */
static int nfs4_xdr_dec_getdeviceinfo(struct rpc_rqst *rqstp, uint32_t *p,
				      struct nfs4_getdeviceinfo_res *res)
{
	struct xdr_stream xdr;
	struct compound_hdr hdr;
	int status;

	xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
	status = decode_compound_hdr(&xdr, &hdr);
	if (status != 0)
		goto out;
	status = decode_sequence(&xdr, &res->seq_res, rqstp);
	if (status != 0)
		goto out;
	status = decode_getdeviceinfo(&xdr, res->pdev);
out:
	return status;
}

/*
 * Decode LAYOUTGET response
 */
static int nfs4_xdr_dec_layoutget(struct rpc_rqst *rqstp, uint32_t *p,
				  struct nfs4_layoutget_res *res)
{
	struct xdr_stream xdr;
	struct compound_hdr hdr;
	int status;

	xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
	status = decode_compound_hdr(&xdr, &hdr);
	if (status)
		goto out;
	status = decode_sequence(&xdr, &res->seq_res, rqstp);
	if (status)
		goto out;
	status = decode_putfh(&xdr);
	if (status)
		goto out;
	status = decode_layoutget(&xdr, rqstp, res);
out:
	return status;
}
B
Benny Halevy 已提交
6160 6161
#endif /* CONFIG_NFS_V4_1 */

6162 6163 6164 6165 6166 6167 6168 6169 6170 6171 6172 6173 6174 6175 6176 6177
/**
 * nfs4_decode_dirent - Decode a single NFSv4 directory entry stored in
 *                      the local page cache.
 * @xdr: XDR stream where entry resides
 * @entry: buffer to fill in with entry data
 * @plus: boolean indicating whether this should be a readdirplus entry
 *
 * Returns zero if successful, otherwise a negative errno value is
 * returned.
 *
 * This function is not invoked during READDIR reply decoding, but
 * rather whenever an application invokes the getdents(2) system call
 * on a directory already in our cache.
 */
int nfs4_decode_dirent(struct xdr_stream *xdr, struct nfs_entry *entry,
		       int plus)
L
Linus Torvalds 已提交
6178 6179 6180
{
	uint32_t bitmap[2] = {0};
	uint32_t len;
6181 6182 6183 6184 6185 6186 6187 6188
	__be32 *p = xdr_inline_decode(xdr, 4);
	if (unlikely(!p))
		goto out_overflow;
	if (!ntohl(*p++)) {
		p = xdr_inline_decode(xdr, 4);
		if (unlikely(!p))
			goto out_overflow;
		if (!ntohl(*p++))
6189
			return -EAGAIN;
L
Linus Torvalds 已提交
6190
		entry->eof = 1;
6191
		return -EBADCOOKIE;
L
Linus Torvalds 已提交
6192 6193
	}

6194 6195 6196
	p = xdr_inline_decode(xdr, 12);
	if (unlikely(!p))
		goto out_overflow;
L
Linus Torvalds 已提交
6197 6198 6199
	entry->prev_cookie = entry->cookie;
	p = xdr_decode_hyper(p, &entry->cookie);
	entry->len = ntohl(*p++);
6200

6201
	p = xdr_inline_decode(xdr, entry->len);
6202 6203
	if (unlikely(!p))
		goto out_overflow;
L
Linus Torvalds 已提交
6204 6205 6206 6207 6208 6209 6210 6211
	entry->name = (const char *) p;

	/*
	 * In case the server doesn't return an inode number,
	 * we fake one here.  (We don't use inode number 0,
	 * since glibc seems to choke on it...)
	 */
	entry->ino = 1;
6212
	entry->fattr->valid = 0;
L
Linus Torvalds 已提交
6213

6214 6215 6216 6217 6218 6219
	if (decode_attr_bitmap(xdr, bitmap) < 0)
		goto out_overflow;

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

6220 6221
	if (decode_getfattr_attrs(xdr, bitmap, entry->fattr, entry->fh,
					entry->server, 1) < 0)
6222 6223 6224 6225
		goto out_overflow;
	if (entry->fattr->valid & NFS_ATTR_FATTR_FILEID)
		entry->ino = entry->fattr->fileid;

6226 6227 6228 6229
	entry->d_type = DT_UNKNOWN;
	if (entry->fattr->valid & NFS_ATTR_FATTR_TYPE)
		entry->d_type = nfs_umode_to_dtype(entry->fattr->mode);

6230
	if (verify_attr_len(xdr, p, len) < 0)
6231
		goto out_overflow;
L
Linus Torvalds 已提交
6232

6233 6234 6235 6236 6237 6238
	p = xdr_inline_peek(xdr, 8);
	if (p != NULL)
		entry->eof = !p[0] && p[1];
	else
		entry->eof = 0;

6239
	return 0;
6240 6241 6242

out_overflow:
	print_overflow_msg(__func__, xdr);
6243
	return -EAGAIN;
L
Linus Torvalds 已提交
6244 6245 6246 6247 6248 6249 6250 6251 6252 6253 6254
}

/*
 * 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		},
6255 6256 6257 6258 6259 6260 6261 6262 6263 6264 6265 6266 6267 6268 6269 6270 6271 6272 6273 6274 6275 6276 6277 6278
	{ 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	},
6279
	{ NFS4ERR_SERVERFAULT,	-EREMOTEIO	},
6280 6281 6282 6283 6284 6285
	{ NFS4ERR_BADTYPE,	-EBADTYPE	},
	{ NFS4ERR_LOCKED,	-EAGAIN		},
	{ NFS4ERR_SYMLINK,	-ELOOP		},
	{ NFS4ERR_OP_ILLEGAL,	-EOPNOTSUPP	},
	{ NFS4ERR_DEADLOCK,	-EDEADLK	},
	{ NFS4ERR_WRONGSEC,	-EPERM		}, /* FIXME: this needs
L
Linus Torvalds 已提交
6286 6287 6288
						    * to be handled by a
						    * middle-layer.
						    */
6289
	{ -1,			-EIO		}
L
Linus Torvalds 已提交
6290 6291 6292 6293 6294 6295 6296
};

/*
 * Convert an NFS error code to a local one.
 * This one is used jointly by NFSv2 and NFSv3.
 */
static int
6297
nfs4_stat_to_errno(int stat)
L
Linus Torvalds 已提交
6298 6299 6300 6301 6302 6303 6304 6305
{
	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. */
6306
		return -EREMOTEIO;
L
Linus Torvalds 已提交
6307 6308 6309 6310 6311 6312
	}
	/* 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.
	 */
6313
	return -stat;
L
Linus Torvalds 已提交
6314 6315 6316 6317 6318
}

#define PROC(proc, argtype, restype)				\
[NFSPROC4_CLNT_##proc] = {					\
	.p_proc   = NFSPROC4_COMPOUND,				\
6319 6320
	.p_encode = (kxdrproc_t)nfs4_xdr_##argtype,		\
	.p_decode = (kxdrproc_t)nfs4_xdr_##restype,		\
6321 6322
	.p_arglen = NFS4_##argtype##_sz,			\
	.p_replen = NFS4_##restype##_sz,			\
6323 6324
	.p_statidx = NFSPROC4_CLNT_##proc,			\
	.p_name   = #proc,					\
A
Andy Adamson 已提交
6325
}
L
Linus Torvalds 已提交
6326 6327

struct rpc_procinfo	nfs4_procedures[] = {
6328 6329 6330 6331 6332 6333 6334 6335 6336 6337 6338 6339 6340 6341 6342 6343 6344 6345 6346 6347 6348 6349 6350 6351 6352 6353 6354 6355 6356 6357 6358 6359 6360 6361 6362
	PROC(READ,		enc_read,		dec_read),
	PROC(WRITE,		enc_write,		dec_write),
	PROC(COMMIT,		enc_commit,		dec_commit),
	PROC(OPEN,		enc_open,		dec_open),
	PROC(OPEN_CONFIRM,	enc_open_confirm,	dec_open_confirm),
	PROC(OPEN_NOATTR,	enc_open_noattr,	dec_open_noattr),
	PROC(OPEN_DOWNGRADE,	enc_open_downgrade,	dec_open_downgrade),
	PROC(CLOSE,		enc_close,		dec_close),
	PROC(SETATTR,		enc_setattr,		dec_setattr),
	PROC(FSINFO,		enc_fsinfo,		dec_fsinfo),
	PROC(RENEW,		enc_renew,		dec_renew),
	PROC(SETCLIENTID,	enc_setclientid,	dec_setclientid),
	PROC(SETCLIENTID_CONFIRM, enc_setclientid_confirm, dec_setclientid_confirm),
	PROC(LOCK,		enc_lock,		dec_lock),
	PROC(LOCKT,		enc_lockt,		dec_lockt),
	PROC(LOCKU,		enc_locku,		dec_locku),
	PROC(ACCESS,		enc_access,		dec_access),
	PROC(GETATTR,		enc_getattr,		dec_getattr),
	PROC(LOOKUP,		enc_lookup,		dec_lookup),
	PROC(LOOKUP_ROOT,	enc_lookup_root,	dec_lookup_root),
	PROC(REMOVE,		enc_remove,		dec_remove),
	PROC(RENAME,		enc_rename,		dec_rename),
	PROC(LINK,		enc_link,		dec_link),
	PROC(SYMLINK,		enc_symlink,		dec_symlink),
	PROC(CREATE,		enc_create,		dec_create),
	PROC(PATHCONF,		enc_pathconf,		dec_pathconf),
	PROC(STATFS,		enc_statfs,		dec_statfs),
	PROC(READLINK,		enc_readlink,		dec_readlink),
	PROC(READDIR,		enc_readdir,		dec_readdir),
	PROC(SERVER_CAPS,	enc_server_caps,	dec_server_caps),
	PROC(DELEGRETURN,	enc_delegreturn,	dec_delegreturn),
	PROC(GETACL,		enc_getacl,		dec_getacl),
	PROC(SETACL,		enc_setacl,		dec_setacl),
	PROC(FS_LOCATIONS,	enc_fs_locations,	dec_fs_locations),
	PROC(RELEASE_LOCKOWNER,	enc_release_lockowner,	dec_release_lockowner),
B
Benny Halevy 已提交
6363
#if defined(CONFIG_NFS_V4_1)
6364 6365 6366 6367 6368 6369 6370 6371
	PROC(EXCHANGE_ID,	enc_exchange_id,	dec_exchange_id),
	PROC(CREATE_SESSION,	enc_create_session,	dec_create_session),
	PROC(DESTROY_SESSION,	enc_destroy_session,	dec_destroy_session),
	PROC(SEQUENCE,		enc_sequence,		dec_sequence),
	PROC(GET_LEASE_TIME,	enc_get_lease_time,	dec_get_lease_time),
	PROC(RECLAIM_COMPLETE,	enc_reclaim_complete,	dec_reclaim_complete),
	PROC(GETDEVICEINFO,	enc_getdeviceinfo,	dec_getdeviceinfo),
	PROC(LAYOUTGET,		enc_layoutget,		dec_layoutget),
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#endif /* CONFIG_NFS_V4_1 */
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};

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

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