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nfs4xdr.c
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nfs4xdr.c
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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 <[email protected]>
* Andy Adamson <[email protected]>
*
* 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>
#include <linux/sunrpc/msg_prot.h>
#include <linux/nfs.h>
#include <linux/nfs4.h>
#include <linux/nfs_fs.h>
#include <linux/nfs_idmap.h>
#include "nfs4_fs.h"
#include "internal.h"
#include "pnfs.h"
#define NFSDBG_FACILITY NFSDBG_XDR
/* Mapping from NFS error code to "errno" error code. */
#define errno_NFSERR_IO EIO
static int nfs4_stat_to_errno(int);
/* NFSv4 COMPOUND tags are only wanted for debugging purposes */
#ifdef DEBUG
#define NFS4_MAXTAGLEN 20
#else
#define NFS4_MAXTAGLEN 0
#endif
/* lock,open owner id:
* we currently use size 2 (u64) out of (NFS4_OPAQUE_LIMIT >> 2)
*/
#define open_owner_id_maxsz (1 + 1 + 4)
#define lock_owner_id_maxsz (1 + 1 + 4)
#define decode_lockowner_maxsz (1 + XDR_QUADLEN(IDMAP_NAMESZ))
#define compound_encode_hdr_maxsz (3 + (NFS4_MAXTAGLEN >> 2))
#define compound_decode_hdr_maxsz (3 + (NFS4_MAXTAGLEN >> 2))
#define op_encode_hdr_maxsz (1)
#define op_decode_hdr_maxsz (2)
#define encode_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))
#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))
#define nfs4_fattr_bitmap_maxsz 3
#define encode_getattr_maxsz (op_encode_hdr_maxsz + nfs4_fattr_bitmap_maxsz)
#define nfs4_name_maxsz (1 + ((3 + NFS4_MAXNAMLEN) >> 2))
#define nfs4_path_maxsz (1 + ((3 + NFS4_MAXPATHLEN) >> 2))
#define nfs4_owner_maxsz (1 + XDR_QUADLEN(IDMAP_NAMESZ))
#define nfs4_group_maxsz (1 + XDR_QUADLEN(IDMAP_NAMESZ))
/* 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 + \
3 + 3 + 3 + nfs4_owner_maxsz + nfs4_group_maxsz))
#define nfs4_fattr_maxsz (nfs4_fattr_bitmap_maxsz + \
nfs4_fattr_value_maxsz)
#define decode_getattr_maxsz (op_decode_hdr_maxsz + nfs4_fattr_maxsz)
#define encode_attrs_maxsz (nfs4_fattr_bitmap_maxsz + \
1 + 2 + 1 + \
nfs4_owner_maxsz + \
nfs4_group_maxsz + \
4 + 4)
#define encode_savefh_maxsz (op_encode_hdr_maxsz)
#define decode_savefh_maxsz (op_decode_hdr_maxsz)
#define encode_restorefh_maxsz (op_encode_hdr_maxsz)
#define decode_restorefh_maxsz (op_decode_hdr_maxsz)
#define encode_fsinfo_maxsz (encode_getattr_maxsz)
#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 + \
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 */
#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)
#define encode_lookup_maxsz (op_encode_hdr_maxsz + nfs4_name_maxsz)
#define decode_lookup_maxsz (op_decode_hdr_maxsz)
#define encode_share_access_maxsz \
(2)
#define encode_createmode_maxsz (1 + encode_attrs_maxsz + encode_verifier_maxsz)
#define encode_opentype_maxsz (1 + encode_createmode_maxsz)
#define encode_claim_null_maxsz (1 + nfs4_name_maxsz)
#define encode_open_maxsz (op_encode_hdr_maxsz + \
2 + encode_share_access_maxsz + 2 + \
open_owner_id_maxsz + \
encode_opentype_maxsz + \
encode_claim_null_maxsz)
#define decode_ace_maxsz (3 + nfs4_owner_maxsz)
#define decode_delegation_maxsz (1 + decode_stateid_maxsz + 1 + \
decode_ace_maxsz)
#define decode_change_info_maxsz (5)
#define decode_open_maxsz (op_decode_hdr_maxsz + \
decode_stateid_maxsz + \
decode_change_info_maxsz + 1 + \
nfs4_fattr_bitmap_maxsz + \
decode_delegation_maxsz)
#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)
#define encode_remove_maxsz (op_encode_hdr_maxsz + \
nfs4_name_maxsz)
#define decode_remove_maxsz (op_decode_hdr_maxsz + \
decode_change_info_maxsz)
#define encode_rename_maxsz (op_encode_hdr_maxsz + \
2 * nfs4_name_maxsz)
#define decode_rename_maxsz (op_decode_hdr_maxsz + \
decode_change_info_maxsz + \
decode_change_info_maxsz)
#define encode_link_maxsz (op_encode_hdr_maxsz + \
nfs4_name_maxsz)
#define decode_link_maxsz (op_decode_hdr_maxsz + decode_change_info_maxsz)
#define encode_lockowner_maxsz (7)
#define encode_lock_maxsz (op_encode_hdr_maxsz + \
7 + \
1 + encode_stateid_maxsz + 1 + \
encode_lockowner_maxsz)
#define decode_lock_denied_maxsz \
(8 + decode_lockowner_maxsz)
#define decode_lock_maxsz (op_decode_hdr_maxsz + \
decode_lock_denied_maxsz)
#define encode_lockt_maxsz (op_encode_hdr_maxsz + 5 + \
encode_lockowner_maxsz)
#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)
#define encode_release_lockowner_maxsz \
(op_encode_hdr_maxsz + \
encode_lockowner_maxsz)
#define decode_release_lockowner_maxsz \
(op_decode_hdr_maxsz)
#define encode_access_maxsz (op_encode_hdr_maxsz + 1)
#define decode_access_maxsz (op_decode_hdr_maxsz + 2)
#define encode_symlink_maxsz (op_encode_hdr_maxsz + \
1 + nfs4_name_maxsz + \
1 + \
nfs4_fattr_maxsz)
#define decode_symlink_maxsz (op_decode_hdr_maxsz + 8)
#define encode_create_maxsz (op_encode_hdr_maxsz + \
1 + 2 + nfs4_name_maxsz + \
encode_attrs_maxsz)
#define decode_create_maxsz (op_decode_hdr_maxsz + \
decode_change_info_maxsz + \
nfs4_fattr_bitmap_maxsz)
#define encode_statfs_maxsz (encode_getattr_maxsz)
#define decode_statfs_maxsz (decode_getattr_maxsz)
#define encode_delegreturn_maxsz (op_encode_hdr_maxsz + 4)
#define decode_delegreturn_maxsz (op_decode_hdr_maxsz)
#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)
#define encode_fs_locations_maxsz \
(encode_getattr_maxsz)
#define decode_fs_locations_maxsz \
(0)
#if defined(CONFIG_NFS_V4_1)
#define NFS4_MAX_MACHINE_NAME_LEN (64)
#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 */)
#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)
#define encode_destroy_session_maxsz (op_encode_hdr_maxsz + 4)
#define decode_destroy_session_maxsz (op_decode_hdr_maxsz)
#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)
#define encode_reclaim_complete_maxsz (op_encode_hdr_maxsz + 4)
#define decode_reclaim_complete_maxsz (op_decode_hdr_maxsz + 4)
#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))
#else /* CONFIG_NFS_V4_1 */
#define encode_sequence_maxsz 0
#define decode_sequence_maxsz 0
#endif /* CONFIG_NFS_V4_1 */
#define NFS4_enc_compound_sz (1024) /* XXX: large enough? */
#define NFS4_dec_compound_sz (1024) /* XXX: large enough? */
#define NFS4_enc_read_sz (compound_encode_hdr_maxsz + \
encode_sequence_maxsz + \
encode_putfh_maxsz + \
encode_read_maxsz)
#define NFS4_dec_read_sz (compound_decode_hdr_maxsz + \
decode_sequence_maxsz + \
decode_putfh_maxsz + \
decode_read_maxsz)
#define NFS4_enc_readlink_sz (compound_encode_hdr_maxsz + \
encode_sequence_maxsz + \
encode_putfh_maxsz + \
encode_readlink_maxsz)
#define NFS4_dec_readlink_sz (compound_decode_hdr_maxsz + \
decode_sequence_maxsz + \
decode_putfh_maxsz + \
decode_readlink_maxsz)
#define NFS4_enc_readdir_sz (compound_encode_hdr_maxsz + \
encode_sequence_maxsz + \
encode_putfh_maxsz + \
encode_readdir_maxsz)
#define NFS4_dec_readdir_sz (compound_decode_hdr_maxsz + \
decode_sequence_maxsz + \
decode_putfh_maxsz + \
decode_readdir_maxsz)
#define NFS4_enc_write_sz (compound_encode_hdr_maxsz + \
encode_sequence_maxsz + \
encode_putfh_maxsz + \
encode_write_maxsz + \
encode_getattr_maxsz)
#define NFS4_dec_write_sz (compound_decode_hdr_maxsz + \
decode_sequence_maxsz + \
decode_putfh_maxsz + \
decode_write_maxsz + \
decode_getattr_maxsz)
#define NFS4_enc_commit_sz (compound_encode_hdr_maxsz + \
encode_sequence_maxsz + \
encode_putfh_maxsz + \
encode_commit_maxsz + \
encode_getattr_maxsz)
#define NFS4_dec_commit_sz (compound_decode_hdr_maxsz + \
decode_sequence_maxsz + \
decode_putfh_maxsz + \
decode_commit_maxsz + \
decode_getattr_maxsz)
#define NFS4_enc_open_sz (compound_encode_hdr_maxsz + \
encode_sequence_maxsz + \
encode_putfh_maxsz + \
encode_savefh_maxsz + \
encode_open_maxsz + \
encode_getfh_maxsz + \
encode_getattr_maxsz + \
encode_restorefh_maxsz + \
encode_getattr_maxsz)
#define NFS4_dec_open_sz (compound_decode_hdr_maxsz + \
decode_sequence_maxsz + \
decode_putfh_maxsz + \
decode_savefh_maxsz + \
decode_open_maxsz + \
decode_getfh_maxsz + \
decode_getattr_maxsz + \
decode_restorefh_maxsz + \
decode_getattr_maxsz)
#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)
#define NFS4_enc_open_noattr_sz (compound_encode_hdr_maxsz + \
encode_sequence_maxsz + \
encode_putfh_maxsz + \
encode_open_maxsz + \
encode_getattr_maxsz)
#define NFS4_dec_open_noattr_sz (compound_decode_hdr_maxsz + \
decode_sequence_maxsz + \
decode_putfh_maxsz + \
decode_open_maxsz + \
decode_getattr_maxsz)
#define NFS4_enc_open_downgrade_sz \
(compound_encode_hdr_maxsz + \
encode_sequence_maxsz + \
encode_putfh_maxsz + \
encode_open_downgrade_maxsz + \
encode_getattr_maxsz)
#define NFS4_dec_open_downgrade_sz \
(compound_decode_hdr_maxsz + \
decode_sequence_maxsz + \
decode_putfh_maxsz + \
decode_open_downgrade_maxsz + \
decode_getattr_maxsz)
#define NFS4_enc_close_sz (compound_encode_hdr_maxsz + \
encode_sequence_maxsz + \
encode_putfh_maxsz + \
encode_close_maxsz + \
encode_getattr_maxsz)
#define NFS4_dec_close_sz (compound_decode_hdr_maxsz + \
decode_sequence_maxsz + \
decode_putfh_maxsz + \
decode_close_maxsz + \
decode_getattr_maxsz)
#define NFS4_enc_setattr_sz (compound_encode_hdr_maxsz + \
encode_sequence_maxsz + \
encode_putfh_maxsz + \
encode_setattr_maxsz + \
encode_getattr_maxsz)
#define NFS4_dec_setattr_sz (compound_decode_hdr_maxsz + \
decode_sequence_maxsz + \
decode_putfh_maxsz + \
decode_setattr_maxsz + \
decode_getattr_maxsz)
#define NFS4_enc_fsinfo_sz (compound_encode_hdr_maxsz + \
encode_sequence_maxsz + \
encode_putfh_maxsz + \
encode_fsinfo_maxsz)
#define NFS4_dec_fsinfo_sz (compound_decode_hdr_maxsz + \
decode_sequence_maxsz + \
decode_putfh_maxsz + \
decode_fsinfo_maxsz)
#define NFS4_enc_renew_sz (compound_encode_hdr_maxsz + \
encode_renew_maxsz)
#define NFS4_dec_renew_sz (compound_decode_hdr_maxsz + \
decode_renew_maxsz)
#define NFS4_enc_setclientid_sz (compound_encode_hdr_maxsz + \
encode_setclientid_maxsz)
#define NFS4_dec_setclientid_sz (compound_decode_hdr_maxsz + \
decode_setclientid_maxsz)
#define NFS4_enc_setclientid_confirm_sz \
(compound_encode_hdr_maxsz + \
encode_setclientid_confirm_maxsz + \
encode_putrootfh_maxsz + \
encode_fsinfo_maxsz)
#define NFS4_dec_setclientid_confirm_sz \
(compound_decode_hdr_maxsz + \
decode_setclientid_confirm_maxsz + \
decode_putrootfh_maxsz + \
decode_fsinfo_maxsz)
#define NFS4_enc_lock_sz (compound_encode_hdr_maxsz + \
encode_sequence_maxsz + \
encode_putfh_maxsz + \
encode_lock_maxsz)
#define NFS4_dec_lock_sz (compound_decode_hdr_maxsz + \
decode_sequence_maxsz + \
decode_putfh_maxsz + \
decode_lock_maxsz)
#define NFS4_enc_lockt_sz (compound_encode_hdr_maxsz + \
encode_sequence_maxsz + \
encode_putfh_maxsz + \
encode_lockt_maxsz)
#define NFS4_dec_lockt_sz (compound_decode_hdr_maxsz + \
decode_sequence_maxsz + \
decode_putfh_maxsz + \
decode_lockt_maxsz)
#define NFS4_enc_locku_sz (compound_encode_hdr_maxsz + \
encode_sequence_maxsz + \
encode_putfh_maxsz + \
encode_locku_maxsz)
#define NFS4_dec_locku_sz (compound_decode_hdr_maxsz + \
decode_sequence_maxsz + \
decode_putfh_maxsz + \
decode_locku_maxsz)
#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)
#define NFS4_enc_access_sz (compound_encode_hdr_maxsz + \
encode_sequence_maxsz + \
encode_putfh_maxsz + \
encode_access_maxsz + \
encode_getattr_maxsz)
#define NFS4_dec_access_sz (compound_decode_hdr_maxsz + \
decode_sequence_maxsz + \
decode_putfh_maxsz + \
decode_access_maxsz + \
decode_getattr_maxsz)
#define NFS4_enc_getattr_sz (compound_encode_hdr_maxsz + \
encode_sequence_maxsz + \
encode_putfh_maxsz + \
encode_getattr_maxsz)
#define NFS4_dec_getattr_sz (compound_decode_hdr_maxsz + \
decode_sequence_maxsz + \
decode_putfh_maxsz + \
decode_getattr_maxsz)
#define NFS4_enc_lookup_sz (compound_encode_hdr_maxsz + \
encode_sequence_maxsz + \
encode_putfh_maxsz + \
encode_lookup_maxsz + \
encode_getattr_maxsz + \
encode_getfh_maxsz)
#define NFS4_dec_lookup_sz (compound_decode_hdr_maxsz + \
decode_sequence_maxsz + \
decode_putfh_maxsz + \
decode_lookup_maxsz + \
decode_getattr_maxsz + \
decode_getfh_maxsz)
#define NFS4_enc_lookup_root_sz (compound_encode_hdr_maxsz + \
encode_sequence_maxsz + \
encode_putrootfh_maxsz + \
encode_getattr_maxsz + \
encode_getfh_maxsz)
#define NFS4_dec_lookup_root_sz (compound_decode_hdr_maxsz + \
decode_sequence_maxsz + \
decode_putrootfh_maxsz + \
decode_getattr_maxsz + \
decode_getfh_maxsz)
#define NFS4_enc_remove_sz (compound_encode_hdr_maxsz + \
encode_sequence_maxsz + \
encode_putfh_maxsz + \
encode_remove_maxsz + \
encode_getattr_maxsz)
#define NFS4_dec_remove_sz (compound_decode_hdr_maxsz + \
decode_sequence_maxsz + \
decode_putfh_maxsz + \
decode_remove_maxsz + \
decode_getattr_maxsz)
#define NFS4_enc_rename_sz (compound_encode_hdr_maxsz + \
encode_sequence_maxsz + \
encode_putfh_maxsz + \
encode_savefh_maxsz + \
encode_putfh_maxsz + \
encode_rename_maxsz + \
encode_getattr_maxsz + \
encode_restorefh_maxsz + \
encode_getattr_maxsz)
#define NFS4_dec_rename_sz (compound_decode_hdr_maxsz + \
decode_sequence_maxsz + \
decode_putfh_maxsz + \
decode_savefh_maxsz + \
decode_putfh_maxsz + \
decode_rename_maxsz + \
decode_getattr_maxsz + \
decode_restorefh_maxsz + \
decode_getattr_maxsz)
#define NFS4_enc_link_sz (compound_encode_hdr_maxsz + \
encode_sequence_maxsz + \
encode_putfh_maxsz + \
encode_savefh_maxsz + \
encode_putfh_maxsz + \
encode_link_maxsz + \
decode_getattr_maxsz + \
encode_restorefh_maxsz + \
decode_getattr_maxsz)
#define NFS4_dec_link_sz (compound_decode_hdr_maxsz + \
decode_sequence_maxsz + \
decode_putfh_maxsz + \
decode_savefh_maxsz + \
decode_putfh_maxsz + \
decode_link_maxsz + \
decode_getattr_maxsz + \
decode_restorefh_maxsz + \
decode_getattr_maxsz)
#define NFS4_enc_symlink_sz (compound_encode_hdr_maxsz + \
encode_sequence_maxsz + \
encode_putfh_maxsz + \
encode_symlink_maxsz + \
encode_getattr_maxsz + \
encode_getfh_maxsz)
#define NFS4_dec_symlink_sz (compound_decode_hdr_maxsz + \
decode_sequence_maxsz + \
decode_putfh_maxsz + \
decode_symlink_maxsz + \
decode_getattr_maxsz + \
decode_getfh_maxsz)
#define NFS4_enc_create_sz (compound_encode_hdr_maxsz + \
encode_sequence_maxsz + \
encode_putfh_maxsz + \
encode_savefh_maxsz + \
encode_create_maxsz + \
encode_getfh_maxsz + \
encode_getattr_maxsz + \
encode_restorefh_maxsz + \
encode_getattr_maxsz)
#define NFS4_dec_create_sz (compound_decode_hdr_maxsz + \
decode_sequence_maxsz + \
decode_putfh_maxsz + \
decode_savefh_maxsz + \
decode_create_maxsz + \
decode_getfh_maxsz + \
decode_getattr_maxsz + \
decode_restorefh_maxsz + \
decode_getattr_maxsz)
#define NFS4_enc_pathconf_sz (compound_encode_hdr_maxsz + \
encode_sequence_maxsz + \
encode_putfh_maxsz + \
encode_getattr_maxsz)
#define NFS4_dec_pathconf_sz (compound_decode_hdr_maxsz + \
decode_sequence_maxsz + \
decode_putfh_maxsz + \
decode_getattr_maxsz)
#define NFS4_enc_statfs_sz (compound_encode_hdr_maxsz + \
encode_sequence_maxsz + \
encode_putfh_maxsz + \
encode_statfs_maxsz)
#define NFS4_dec_statfs_sz (compound_decode_hdr_maxsz + \
decode_sequence_maxsz + \
decode_putfh_maxsz + \
decode_statfs_maxsz)
#define NFS4_enc_server_caps_sz (compound_encode_hdr_maxsz + \
encode_sequence_maxsz + \
encode_putfh_maxsz + \
encode_getattr_maxsz)
#define NFS4_dec_server_caps_sz (compound_decode_hdr_maxsz + \
decode_sequence_maxsz + \
decode_putfh_maxsz + \
decode_getattr_maxsz)
#define NFS4_enc_delegreturn_sz (compound_encode_hdr_maxsz + \
encode_sequence_maxsz + \
encode_putfh_maxsz + \
encode_delegreturn_maxsz + \
encode_getattr_maxsz)
#define NFS4_dec_delegreturn_sz (compound_decode_hdr_maxsz + \
decode_sequence_maxsz + \
decode_delegreturn_maxsz + \
decode_getattr_maxsz)
#define NFS4_enc_getacl_sz (compound_encode_hdr_maxsz + \
encode_sequence_maxsz + \
encode_putfh_maxsz + \
encode_getacl_maxsz)
#define NFS4_dec_getacl_sz (compound_decode_hdr_maxsz + \
decode_sequence_maxsz + \
decode_putfh_maxsz + \
decode_getacl_maxsz)
#define NFS4_enc_setacl_sz (compound_encode_hdr_maxsz + \
encode_sequence_maxsz + \
encode_putfh_maxsz + \
encode_setacl_maxsz)
#define NFS4_dec_setacl_sz (compound_decode_hdr_maxsz + \
decode_sequence_maxsz + \
decode_putfh_maxsz + \
decode_setacl_maxsz)
#define NFS4_enc_fs_locations_sz \
(compound_encode_hdr_maxsz + \
encode_sequence_maxsz + \
encode_putfh_maxsz + \
encode_lookup_maxsz + \
encode_fs_locations_maxsz)
#define NFS4_dec_fs_locations_sz \
(compound_decode_hdr_maxsz + \
decode_sequence_maxsz + \
decode_putfh_maxsz + \
decode_lookup_maxsz + \
decode_fs_locations_maxsz)
#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)
#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)
#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)
#define NFS4_enc_sequence_sz \
(compound_decode_hdr_maxsz + \
encode_sequence_maxsz)
#define NFS4_dec_sequence_sz \
(compound_decode_hdr_maxsz + \
decode_sequence_maxsz)
#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)
#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)
#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)
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);
#endif /* CONFIG_NFS_V4_1 */
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,
};
struct compound_hdr {
int32_t status;
uint32_t nops;
__be32 * nops_p;
uint32_t taglen;
char * tag;
uint32_t replen; /* expected reply words */
u32 minorversion;
};
static __be32 *reserve_space(struct xdr_stream *xdr, size_t nbytes)
{
__be32 *p = xdr_reserve_space(xdr, nbytes);
BUG_ON(!p);
return p;
}
static void encode_string(struct xdr_stream *xdr, unsigned int len, const char *str)
{
__be32 *p;
p = xdr_reserve_space(xdr, 4 + len);
BUG_ON(p == NULL);
xdr_encode_opaque(p, str, len);
}
static void encode_compound_hdr(struct xdr_stream *xdr,
struct rpc_rqst *req,
struct compound_hdr *hdr)
{
__be32 *p;
struct rpc_auth *auth = req->rq_cred->cr_auth;
/* initialize running count of expected bytes in reply.
* NOTE: the replied tag SHOULD be the same is the one sent,
* but this is not required as a MUST for the server to do so. */
hdr->replen = RPC_REPHDRSIZE + auth->au_rslack + 3 + hdr->taglen;
dprintk("encode_compound: tag=%.*s\n", (int)hdr->taglen, hdr->tag);
BUG_ON(hdr->taglen > NFS4_MAXTAGLEN);
p = reserve_space(xdr, 4 + hdr->taglen + 8);
p = xdr_encode_opaque(p, hdr->tag, hdr->taglen);
*p++ = cpu_to_be32(hdr->minorversion);
hdr->nops_p = p;
*p = cpu_to_be32(hdr->nops);
}
static void encode_nops(struct compound_hdr *hdr)
{
BUG_ON(hdr->nops > NFS4_MAX_OPS);
*hdr->nops_p = htonl(hdr->nops);
}
static void encode_nfs4_verifier(struct xdr_stream *xdr, const nfs4_verifier *verf)
{
__be32 *p;
p = xdr_reserve_space(xdr, NFS4_VERIFIER_SIZE);
BUG_ON(p == NULL);
xdr_encode_opaque_fixed(p, verf->data, NFS4_VERIFIER_SIZE);
}
static void encode_attrs(struct xdr_stream *xdr, const struct iattr *iap, const struct nfs_server *server)
{
char owner_name[IDMAP_NAMESZ];
char owner_group[IDMAP_NAMESZ];
int owner_namelen = 0;
int owner_grouplen = 0;
__be32 *p;
__be32 *q;
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
* such as owner/group.
*/
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) {
owner_namelen = nfs_map_uid_to_name(server->nfs_client, iap->ia_uid, owner_name, IDMAP_NAMESZ);
if (owner_namelen < 0) {
dprintk("nfs: couldn't resolve uid %d to string\n",
iap->ia_uid);
/* XXX */
strcpy(owner_name, "nobody");
owner_namelen = sizeof("nobody") - 1;
/* goto out; */
}
len += 4 + (XDR_QUADLEN(owner_namelen) << 2);
}
if (iap->ia_valid & ATTR_GID) {
owner_grouplen = nfs_map_gid_to_group(server->nfs_client, iap->ia_gid, owner_group, IDMAP_NAMESZ);
if (owner_grouplen < 0) {
dprintk("nfs: couldn't resolve gid %d to string\n",
iap->ia_gid);
strcpy(owner_group, "nobody");
owner_grouplen = sizeof("nobody") - 1;
/* goto out; */
}
len += 4 + (XDR_QUADLEN(owner_grouplen) << 2);
}
if (iap->ia_valid & ATTR_ATIME_SET)
len += 16;
else if (iap->ia_valid & ATTR_ATIME)
len += 4;
if (iap->ia_valid & ATTR_MTIME_SET)
len += 16;
else if (iap->ia_valid & ATTR_MTIME)
len += 4;
p = reserve_space(xdr, len);
/*
* We write the bitmap length now, but leave the bitmap and the attribute
* buffer length to be backfilled at the end of this routine.
*/
*p++ = cpu_to_be32(2);
q = p;
p += 3;
if (iap->ia_valid & ATTR_SIZE) {
bmval0 |= FATTR4_WORD0_SIZE;
p = xdr_encode_hyper(p, iap->ia_size);
}
if (iap->ia_valid & ATTR_MODE) {
bmval1 |= FATTR4_WORD1_MODE;
*p++ = cpu_to_be32(iap->ia_mode & S_IALLUGO);
}
if (iap->ia_valid & ATTR_UID) {
bmval1 |= FATTR4_WORD1_OWNER;
p = xdr_encode_opaque(p, owner_name, owner_namelen);
}
if (iap->ia_valid & ATTR_GID) {
bmval1 |= FATTR4_WORD1_OWNER_GROUP;
p = xdr_encode_opaque(p, owner_group, owner_grouplen);
}
if (iap->ia_valid & ATTR_ATIME_SET) {
bmval1 |= FATTR4_WORD1_TIME_ACCESS_SET;
*p++ = cpu_to_be32(NFS4_SET_TO_CLIENT_TIME);
*p++ = cpu_to_be32(0);
*p++ = cpu_to_be32(iap->ia_atime.tv_sec);
*p++ = cpu_to_be32(iap->ia_atime.tv_nsec);
}
else if (iap->ia_valid & ATTR_ATIME) {
bmval1 |= FATTR4_WORD1_TIME_ACCESS_SET;
*p++ = cpu_to_be32(NFS4_SET_TO_SERVER_TIME);
}
if (iap->ia_valid & ATTR_MTIME_SET) {
bmval1 |= FATTR4_WORD1_TIME_MODIFY_SET;
*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);
}
else if (iap->ia_valid & ATTR_MTIME) {
bmval1 |= FATTR4_WORD1_TIME_MODIFY_SET;
*p++ = cpu_to_be32(NFS4_SET_TO_SERVER_TIME);
}
/*
* Now we backfill the bitmap and the attribute buffer length.
*/
if (len != ((char *)p - (char *)q) + 4) {
printk(KERN_ERR "nfs: Attr length error, %u != %Zu\n",
len, ((char *)p - (char *)q) + 4);
BUG();
}
len = (char *)p - (char *)q - 12;
*q++ = htonl(bmval0);
*q++ = htonl(bmval1);
*q = htonl(len);
/* out: */
}
static void encode_access(struct xdr_stream *xdr, u32 access, struct compound_hdr *hdr)
{
__be32 *p;
p = reserve_space(xdr, 8);
*p++ = cpu_to_be32(OP_ACCESS);
*p = cpu_to_be32(access);
hdr->nops++;
hdr->replen += decode_access_maxsz;
}
static void encode_close(struct xdr_stream *xdr, const struct nfs_closeargs *arg, struct compound_hdr *hdr)
{
__be32 *p;
p = reserve_space(xdr, 8+NFS4_STATEID_SIZE);
*p++ = cpu_to_be32(OP_CLOSE);
*p++ = cpu_to_be32(arg->seqid->sequence->counter);
xdr_encode_opaque_fixed(p, arg->stateid->data, NFS4_STATEID_SIZE);
hdr->nops++;
hdr->replen += decode_close_maxsz;
}
static void encode_commit(struct xdr_stream *xdr, const struct nfs_writeargs *args, struct compound_hdr *hdr)
{
__be32 *p;
p = reserve_space(xdr, 16);
*p++ = cpu_to_be32(OP_COMMIT);
p = xdr_encode_hyper(p, args->offset);
*p = cpu_to_be32(args->count);
hdr->nops++;
hdr->replen += decode_commit_maxsz;
}
static void encode_create(struct xdr_stream *xdr, const struct nfs4_create_arg *create, struct compound_hdr *hdr)
{
__be32 *p;
p = reserve_space(xdr, 8);
*p++ = cpu_to_be32(OP_CREATE);
*p = cpu_to_be32(create->ftype);
switch (create->ftype) {
case NF4LNK:
p = reserve_space(xdr, 4);
*p = cpu_to_be32(create->u.symlink.len);
xdr_write_pages(xdr, create->u.symlink.pages, 0, create->u.symlink.len);
break;
case NF4BLK: case NF4CHR:
p = reserve_space(xdr, 8);
*p++ = cpu_to_be32(create->u.device.specdata1);
*p = cpu_to_be32(create->u.device.specdata2);
break;
default:
break;
}