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WSL2-Linux-Kernel/fs/nfs/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 <kmsmith@umich.edu>
* Andy Adamson <andros@umich.edu>
*
* 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/module.h>
#include <linux/utsname.h>
#include <linux/sunrpc/clnt.h>
#include <linux/sunrpc/msg_prot.h>
#include <linux/sunrpc/gss_api.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 + 2 + 1 + 1 + 2)
#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 4
#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)
/* The 5 accounts for the PNFS attributes, and assumes that at most three
* layout types will be returned.
*/
#define decode_fsinfo_maxsz (op_decode_hdr_maxsz + \
nfs4_fattr_bitmap_maxsz + 4 + 8 + 5)
#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)
#define encode_secinfo_maxsz (op_encode_hdr_maxsz + nfs4_name_maxsz)
#define decode_secinfo_maxsz (op_decode_hdr_maxsz + 1 + ((NFS_MAX_SECFLAVORS * (16 + GSS_OID_MAX_LEN)) / 4))
#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 /* implementation id array of size 1 */ + \
1 /* nii_domain */ + \
XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + \
1 /* nii_name */ + \
XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + \
3 /* nii_date */)
#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 */ + \
1 /* nii_domain */ + \
XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + \
1 /* nii_name */ + \
XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + \
3 /* nii_date */)
#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_getdevicelist_maxsz (op_encode_hdr_maxsz + 4 + \
encode_verifier_maxsz)
#define decode_getdevicelist_maxsz (op_decode_hdr_maxsz + \
2 /* nfs_cookie4 gdlr_cookie */ + \
decode_verifier_maxsz \
/* verifier4 gdlr_verifier */ + \
1 /* gdlr_deviceid_list count */ + \
XDR_QUADLEN(NFS4_PNFS_GETDEVLIST_MAXNUM * \
NFS4_DEVICEID4_SIZE) \
/* gdlr_deviceid_list */ + \
1 /* bool gdlr_eof */)
#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))
#define encode_layoutcommit_maxsz (op_encode_hdr_maxsz + \
2 /* offset */ + \
2 /* length */ + \
1 /* reclaim */ + \
encode_stateid_maxsz + \
1 /* new offset (true) */ + \
2 /* last byte written */ + \
1 /* nt_timechanged (false) */ + \
1 /* layoutupdate4 layout type */ + \
1 /* NULL filelayout layoutupdate4 payload */)
#define decode_layoutcommit_maxsz (op_decode_hdr_maxsz + 3)
#define encode_layoutreturn_maxsz (8 + op_encode_hdr_maxsz + \
encode_stateid_maxsz + \
1 /* FIXME: opaque lrf_body always empty at the moment */)
#define decode_layoutreturn_maxsz (op_decode_hdr_maxsz + \
1 + decode_stateid_maxsz)
#define encode_secinfo_no_name_maxsz (op_encode_hdr_maxsz + 1)
#define decode_secinfo_no_name_maxsz decode_secinfo_maxsz
#define encode_test_stateid_maxsz (op_encode_hdr_maxsz + 2 + \
XDR_QUADLEN(NFS4_STATEID_SIZE))
#define decode_test_stateid_maxsz (op_decode_hdr_maxsz + 2 + 1)
#define encode_free_stateid_maxsz (op_encode_hdr_maxsz + 1 + \
XDR_QUADLEN(NFS4_STATEID_SIZE))
#define decode_free_stateid_maxsz (op_decode_hdr_maxsz + 1)
#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)
#define NFS4_enc_secinfo_sz (compound_encode_hdr_maxsz + \
encode_sequence_maxsz + \
encode_putfh_maxsz + \
encode_secinfo_maxsz)
#define NFS4_dec_secinfo_sz (compound_decode_hdr_maxsz + \
decode_sequence_maxsz + \
decode_putfh_maxsz + \
decode_secinfo_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_getdevicelist_sz (compound_encode_hdr_maxsz + \
encode_sequence_maxsz + \
encode_putfh_maxsz + \
encode_getdevicelist_maxsz)
#define NFS4_dec_getdevicelist_sz (compound_decode_hdr_maxsz + \
decode_sequence_maxsz + \
decode_putfh_maxsz + \
decode_getdevicelist_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)
#define NFS4_enc_layoutcommit_sz (compound_encode_hdr_maxsz + \
encode_sequence_maxsz +\
encode_putfh_maxsz + \
encode_layoutcommit_maxsz + \
encode_getattr_maxsz)
#define NFS4_dec_layoutcommit_sz (compound_decode_hdr_maxsz + \
decode_sequence_maxsz + \
decode_putfh_maxsz + \
decode_layoutcommit_maxsz + \
decode_getattr_maxsz)
#define NFS4_enc_layoutreturn_sz (compound_encode_hdr_maxsz + \
encode_sequence_maxsz + \
encode_putfh_maxsz + \
encode_layoutreturn_maxsz)
#define NFS4_dec_layoutreturn_sz (compound_decode_hdr_maxsz + \
decode_sequence_maxsz + \
decode_putfh_maxsz + \
decode_layoutreturn_maxsz)
#define NFS4_enc_secinfo_no_name_sz (compound_encode_hdr_maxsz + \
encode_sequence_maxsz + \
encode_putrootfh_maxsz +\
encode_secinfo_no_name_maxsz)
#define NFS4_dec_secinfo_no_name_sz (compound_decode_hdr_maxsz + \
decode_sequence_maxsz + \
decode_putrootfh_maxsz + \
decode_secinfo_no_name_maxsz)
#define NFS4_enc_test_stateid_sz (compound_encode_hdr_maxsz + \
encode_sequence_maxsz + \
encode_test_stateid_maxsz)
#define NFS4_dec_test_stateid_sz (compound_decode_hdr_maxsz + \
decode_sequence_maxsz + \
decode_test_stateid_maxsz)
#define NFS4_enc_free_stateid_sz (compound_encode_hdr_maxsz + \
encode_sequence_maxsz + \
encode_free_stateid_maxsz)
#define NFS4_dec_free_stateid_sz (compound_decode_hdr_maxsz + \
decode_sequence_maxsz + \
decode_free_stateid_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 unsigned short send_implementation_id = 1;
module_param(send_implementation_id, ushort, 0644);
MODULE_PARM_DESC(send_implementation_id,
"Send implementation ID with NFSv4.1 exchange_id");
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_opaque_fixed(struct xdr_stream *xdr, const void *buf, size_t len)
{
__be32 *p;
p = xdr_reserve_space(xdr, len);
xdr_encode_opaque_fixed(p, buf, len);
}
static void encode_string(struct xdr_stream *xdr, unsigned int len, const char *str)
{
__be32 *p;
p = reserve_space(xdr, 4 + len);
xdr_encode_opaque(p, str, len);
}
static void encode_uint32(struct xdr_stream *xdr, u32 n)
{
__be32 *p;
p = reserve_space(xdr, 4);
*p = cpu_to_be32(n);
}
static void encode_uint64(struct xdr_stream *xdr, u64 n)
{
__be32 *p;
p = reserve_space(xdr, 8);
xdr_encode_hyper(p, n);
}
static void encode_nfs4_seqid(struct xdr_stream *xdr,
const struct nfs_seqid *seqid)
{
encode_uint32(xdr, seqid->sequence->counter);
}
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;
BUG_ON(hdr->taglen > NFS4_MAXTAGLEN);
encode_string(xdr, hdr->taglen, hdr->tag);
p = reserve_space(xdr, 8);
*p++ = cpu_to_be32(hdr->minorversion);
hdr->nops_p = p;
*p = cpu_to_be32(hdr->nops);
}
static void encode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 op,
uint32_t replen,
struct compound_hdr *hdr)
{
encode_uint32(xdr, op);
hdr->nops++;
hdr->replen += replen;
}
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_stateid(struct xdr_stream *xdr, const nfs4_stateid *stateid)
{
encode_opaque_fixed(xdr, stateid, NFS4_STATEID_SIZE);
}
static void encode_nfs4_verifier(struct xdr_stream *xdr, const nfs4_verifier *verf)
{
encode_opaque_fixed(xdr, 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, 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, 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)
{
encode_op_hdr(xdr, OP_ACCESS, decode_access_maxsz, hdr);
encode_uint32(xdr, access);
}
static void encode_close(struct xdr_stream *xdr, const struct nfs_closeargs *arg, struct compound_hdr *hdr)
{
encode_op_hdr(xdr, OP_CLOSE, decode_close_maxsz, hdr);
encode_nfs4_seqid(xdr, arg->seqid);
encode_nfs4_stateid(xdr, arg->stateid);
}
static void encode_commit(struct xdr_stream *xdr, const struct nfs_writeargs *args, struct compound_hdr *hdr)
{
__be32 *p;
encode_op_hdr(xdr, OP_COMMIT, decode_commit_maxsz, hdr);
p = reserve_space(xdr, 12);
p = xdr_encode_hyper(p, args->offset);
*p = cpu_to_be32(args->count);
}
static void encode_create(struct xdr_stream *xdr, const struct nfs4_create_arg *create, struct compound_hdr *hdr)
{
__be32 *p;
encode_op_hdr(xdr, OP_CREATE, decode_create_maxsz, hdr);
encode_uint32(xdr, 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;
}
encode_string(xdr, create->name->len, create->name->name);
encode_attrs(xdr, create->attrs, create->server);
}
static void encode_getattr_one(struct xdr_stream *xdr, uint32_t bitmap, struct compound_hdr *hdr)
{
__be32 *p;
encode_op_hdr(xdr, OP_GETATTR, decode_getattr_maxsz, hdr);
p = reserve_space(xdr, 8);
*p++ = cpu_to_be32(1);
*p = cpu_to_be32(bitmap);
}
static void encode_getattr_two(struct xdr_stream *xdr, uint32_t bm0, uint32_t bm1, struct compound_hdr *hdr)
{
__be32 *p;
encode_op_hdr(xdr, OP_GETATTR, decode_getattr_maxsz, hdr);
p = reserve_space(xdr, 12);
*p++ = cpu_to_be32(2);
*p++ = cpu_to_be32(bm0);
*p = cpu_to_be32(bm1);
}
static void
encode_getattr_three(struct xdr_stream *xdr,
uint32_t bm0, uint32_t bm1, uint32_t bm2,
struct compound_hdr *hdr)
{
__be32 *p;
encode_op_hdr(xdr, OP_GETATTR, decode_getattr_maxsz, hdr);
if (bm2) {
p = reserve_space(xdr, 16);
*p++ = cpu_to_be32(3);
*p++ = cpu_to_be32(bm0);
*p++ = cpu_to_be32(bm1);
*p = cpu_to_be32(bm2);
} else if (bm1) {
p = reserve_space(xdr, 12);
*p++ = cpu_to_be32(2);
*p++ = cpu_to_be32(bm0);
*p = cpu_to_be32(bm1);
} else {
p = reserve_space(xdr, 8);
*p++ = cpu_to_be32(1);
*p = cpu_to_be32(bm0);
}
}
static void encode_getfattr(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
{
encode_getattr_two(xdr, bitmask[0] & nfs4_fattr_bitmap[0],
bitmask[1] & nfs4_fattr_bitmap[1], hdr);
}
static void encode_fsinfo(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
{
encode_getattr_three(xdr,
bitmask[0] & nfs4_fsinfo_bitmap[0],
bitmask[1] & nfs4_fsinfo_bitmap[1],
bitmask[2] & nfs4_fsinfo_bitmap[2],
hdr);
}
static void encode_fs_locations(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
{
encode_getattr_two(xdr, bitmask[0] & nfs4_fs_locations_bitmap[0],
bitmask[1] & nfs4_fs_locations_bitmap[1], hdr);
}
static void encode_getfh(struct xdr_stream *xdr, struct compound_hdr *hdr)
{
encode_op_hdr(xdr, OP_GETFH, decode_getfh_maxsz, hdr);
}
static void encode_link(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
{
encode_op_hdr(xdr, OP_LINK, decode_link_maxsz, hdr);
encode_string(xdr, name->len, name->name);
}
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;
}
static void encode_lockowner(struct xdr_stream *xdr, const struct nfs_lowner *lowner)
{
__be32 *p;
p = reserve_space(xdr, 32);
p = xdr_encode_hyper(p, lowner->clientid);
*p++ = cpu_to_be32(20);
p = xdr_encode_opaque_fixed(p, "lock id:", 8);
*p++ = cpu_to_be32(lowner->s_dev);
xdr_encode_hyper(p, lowner->id);
}
/*
* opcode,type,reclaim,offset,length,new_lock_owner = 32
* open_seqid,open_stateid,lock_seqid,lock_owner.clientid, lock_owner.id = 40
*/
static void encode_lock(struct xdr_stream *xdr, const struct nfs_lock_args *args, struct compound_hdr *hdr)
{
__be32 *p;
encode_op_hdr(xdr, OP_LOCK, decode_lock_maxsz, hdr);
p = reserve_space(xdr, 28);
*p++ = cpu_to_be32(nfs4_lock_type(args->fl, args->block));
*p++ = cpu_to_be32(args->reclaim);
p = xdr_encode_hyper(p, args->fl->fl_start);
p = xdr_encode_hyper(p, nfs4_lock_length(args->fl));
*p = cpu_to_be32(args->new_lock_owner);
if (args->new_lock_owner){
encode_nfs4_seqid(xdr, args->open_seqid);
encode_nfs4_stateid(xdr, args->open_stateid);
encode_nfs4_seqid(xdr, args->lock_seqid);
encode_lockowner(xdr, &args->lock_owner);
}
else {
encode_nfs4_stateid(xdr, args->lock_stateid);
encode_nfs4_seqid(xdr, args->lock_seqid);
}
}
static void encode_lockt(struct xdr_stream *xdr, const struct nfs_lockt_args *args, struct compound_hdr *hdr)
{
__be32 *p;
encode_op_hdr(xdr, OP_LOCKT, decode_lockt_maxsz, hdr);
p = reserve_space(xdr, 20);
*p++ = cpu_to_be32(nfs4_lock_type(args->fl, 0));
p = xdr_encode_hyper(p, args->fl->fl_start);
p = xdr_encode_hyper(p, nfs4_lock_length(args->fl));
encode_lockowner(xdr, &args->lock_owner);
}
static void encode_locku(struct xdr_stream *xdr, const struct nfs_locku_args *args, struct compound_hdr *hdr)
{
__be32 *p;
encode_op_hdr(xdr, OP_LOCKU, decode_locku_maxsz, hdr);
encode_uint32(xdr, nfs4_lock_type(args->fl, 0));
encode_nfs4_seqid(xdr, args->seqid);
encode_nfs4_stateid(xdr, args->stateid);
p = reserve_space(xdr, 16);
p = xdr_encode_hyper(p, args->fl->fl_start);
xdr_encode_hyper(p, nfs4_lock_length(args->fl));
}
static void encode_release_lockowner(struct xdr_stream *xdr, const struct nfs_lowner *lowner, struct compound_hdr *hdr)
{
encode_op_hdr(xdr, OP_RELEASE_LOCKOWNER, decode_release_lockowner_maxsz, hdr);
encode_lockowner(xdr, lowner);
}
static void encode_lookup(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
{
encode_op_hdr(xdr, OP_LOOKUP, decode_lookup_maxsz, hdr);
encode_string(xdr, name->len, name->name);
}
static void encode_share_access(struct xdr_stream *xdr, fmode_t fmode)
{
__be32 *p;
p = reserve_space(xdr, 8);
switch (fmode & (FMODE_READ|FMODE_WRITE)) {
case FMODE_READ:
*p++ = cpu_to_be32(NFS4_SHARE_ACCESS_READ);
break;
case FMODE_WRITE:
*p++ = cpu_to_be32(NFS4_SHARE_ACCESS_WRITE);
break;
case FMODE_READ|FMODE_WRITE:
*p++ = cpu_to_be32(NFS4_SHARE_ACCESS_BOTH);
break;
default:
*p++ = cpu_to_be32(0);
}
*p = cpu_to_be32(0); /* for linux, share_deny = 0 always */
}
static inline void encode_openhdr(struct xdr_stream *xdr, const struct nfs_openargs *arg)
{
__be32 *p;
/*
* opcode 4, seqid 4, share_access 4, share_deny 4, clientid 8, ownerlen 4,
* owner 4 = 32
*/
encode_nfs4_seqid(xdr, arg->seqid);
encode_share_access(xdr, arg->fmode);
p = reserve_space(xdr, 36);
p = xdr_encode_hyper(p, arg->clientid);
*p++ = cpu_to_be32(24);
p = xdr_encode_opaque_fixed(p, "open id:", 8);
*p++ = cpu_to_be32(arg->server->s_dev);
*p++ = cpu_to_be32(arg->id.uniquifier);
xdr_encode_hyper(p, arg->id.create_time);
}
static inline void encode_createmode(struct xdr_stream *xdr, const struct nfs_openargs *arg)
{
__be32 *p;
struct nfs_client *clp;
p = reserve_space(xdr, 4);
switch(arg->open_flags & O_EXCL) {
case 0:
*p = cpu_to_be32(NFS4_CREATE_UNCHECKED);
encode_attrs(xdr, arg->u.attrs, arg->server);
break;
default:
clp = arg->server->nfs_client;
if (clp->cl_mvops->minor_version > 0) {
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);
}
}
}
static void encode_opentype(struct xdr_stream *xdr, const struct nfs_openargs *arg)
{
__be32 *p;
p = reserve_space(xdr, 4);
switch (arg->open_flags & O_CREAT) {
case 0:
*p = cpu_to_be32(NFS4_OPEN_NOCREATE);
break;
default:
BUG_ON(arg->claim != NFS4_OPEN_CLAIM_NULL);
*p = cpu_to_be32(NFS4_OPEN_CREATE);
encode_createmode(xdr, arg);
}
}
static inline void encode_delegation_type(struct xdr_stream *xdr, fmode_t delegation_type)
{
__be32 *p;
p = reserve_space(xdr, 4);
switch (delegation_type) {
case 0:
*p = cpu_to_be32(NFS4_OPEN_DELEGATE_NONE);
break;
case FMODE_READ:
*p = cpu_to_be32(NFS4_OPEN_DELEGATE_READ);
break;
case FMODE_WRITE|FMODE_READ:
*p = cpu_to_be32(NFS4_OPEN_DELEGATE_WRITE);
break;
default:
BUG();
}
}
static inline void encode_claim_null(struct xdr_stream *xdr, const struct qstr *name)
{
__be32 *p;
p = reserve_space(xdr, 4);
*p = cpu_to_be32(NFS4_OPEN_CLAIM_NULL);
encode_string(xdr, name->len, name->name);
}
static inline void encode_claim_previous(struct xdr_stream *xdr, fmode_t type)
{
__be32 *p;
p = reserve_space(xdr, 4);
*p = cpu_to_be32(NFS4_OPEN_CLAIM_PREVIOUS);
encode_delegation_type(xdr, type);
}
static inline void encode_claim_delegate_cur(struct xdr_stream *xdr, const struct qstr *name, const nfs4_stateid *stateid)
{
__be32 *p;
p = reserve_space(xdr, 4);
*p = cpu_to_be32(NFS4_OPEN_CLAIM_DELEGATE_CUR);
encode_nfs4_stateid(xdr, stateid);
encode_string(xdr, name->len, name->name);
}
static void encode_open(struct xdr_stream *xdr, const struct nfs_openargs *arg, struct compound_hdr *hdr)
{
encode_op_hdr(xdr, OP_OPEN, decode_open_maxsz, hdr);
encode_openhdr(xdr, arg);
encode_opentype(xdr, arg);
switch (arg->claim) {
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();
}
}
static void encode_open_confirm(struct xdr_stream *xdr, const struct nfs_open_confirmargs *arg, struct compound_hdr *hdr)
{
encode_op_hdr(xdr, OP_OPEN_CONFIRM, decode_open_confirm_maxsz, hdr);
encode_nfs4_stateid(xdr, arg->stateid);
encode_nfs4_seqid(xdr, arg->seqid);
}
static void encode_open_downgrade(struct xdr_stream *xdr, const struct nfs_closeargs *arg, struct compound_hdr *hdr)
{
encode_op_hdr(xdr, OP_OPEN_DOWNGRADE, decode_open_downgrade_maxsz, hdr);
encode_nfs4_stateid(xdr, arg->stateid);
encode_nfs4_seqid(xdr, arg->seqid);
encode_share_access(xdr, arg->fmode);
}
static void
encode_putfh(struct xdr_stream *xdr, const struct nfs_fh *fh, struct compound_hdr *hdr)
{
encode_op_hdr(xdr, OP_PUTFH, decode_putfh_maxsz, hdr);
encode_string(xdr, fh->size, fh->data);
}
static void encode_putrootfh(struct xdr_stream *xdr, struct compound_hdr *hdr)
{
encode_op_hdr(xdr, OP_PUTROOTFH, decode_putrootfh_maxsz, hdr);
}
static void encode_open_stateid(struct xdr_stream *xdr,
const struct nfs_open_context *ctx,
const struct nfs_lock_context *l_ctx,
fmode_t fmode,
int zero_seqid)
{
nfs4_stateid stateid;
if (ctx->state != NULL) {
nfs4_select_rw_stateid(&stateid, ctx->state,
fmode, l_ctx->lockowner, l_ctx->pid);
if (zero_seqid)
stateid.seqid = 0;
encode_nfs4_stateid(xdr, &stateid);
} else
encode_nfs4_stateid(xdr, &zero_stateid);
}
static void encode_read(struct xdr_stream *xdr, const struct nfs_readargs *args, struct compound_hdr *hdr)
{
__be32 *p;
encode_op_hdr(xdr, OP_READ, decode_read_maxsz, hdr);
encode_open_stateid(xdr, args->context, args->lock_context,
FMODE_READ, hdr->minorversion);
p = reserve_space(xdr, 12);
p = xdr_encode_hyper(p, args->offset);
*p = cpu_to_be32(args->count);
}
static void encode_readdir(struct xdr_stream *xdr, const struct nfs4_readdir_arg *readdir, struct rpc_rqst *req, struct compound_hdr *hdr)
{
uint32_t attrs[2] = {
FATTR4_WORD0_RDATTR_ERROR,
FATTR4_WORD1_MOUNTED_ON_FILEID,
};
uint32_t dircount = readdir->count >> 1;
__be32 *p, verf[2];
if (readdir->plus) {
attrs[0] |= FATTR4_WORD0_TYPE|FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE|
FATTR4_WORD0_FSID|FATTR4_WORD0_FILEHANDLE|FATTR4_WORD0_FILEID;
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;
dircount >>= 1;
}
/* Use mounted_on_fileid only if the server supports it */
if (!(readdir->bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID))
attrs[0] |= FATTR4_WORD0_FILEID;
encode_op_hdr(xdr, OP_READDIR, decode_readdir_maxsz, hdr);
encode_uint64(xdr, readdir->cookie);
encode_nfs4_verifier(xdr, &readdir->verifier);
p = reserve_space(xdr, 20);
*p++ = cpu_to_be32(dircount);
*p++ = cpu_to_be32(readdir->count);
*p++ = cpu_to_be32(2);
*p++ = cpu_to_be32(attrs[0] & readdir->bitmask[0]);
*p = cpu_to_be32(attrs[1] & readdir->bitmask[1]);
memcpy(verf, readdir->verifier.data, sizeof(verf));
dprintk("%s: cookie = %Lu, verifier = %08x:%08x, bitmap = %08x:%08x\n",
__func__,
(unsigned long long)readdir->cookie,
verf[0], verf[1],
attrs[0] & readdir->bitmask[0],
attrs[1] & readdir->bitmask[1]);
}
static void encode_readlink(struct xdr_stream *xdr, const struct nfs4_readlink *readlink, struct rpc_rqst *req, struct compound_hdr *hdr)
{
encode_op_hdr(xdr, OP_READLINK, decode_readlink_maxsz, hdr);
}
static void encode_remove(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
{
encode_op_hdr(xdr, OP_REMOVE, decode_remove_maxsz, hdr);
encode_string(xdr, name->len, name->name);
}
static void encode_rename(struct xdr_stream *xdr, const struct qstr *oldname, const struct qstr *newname, struct compound_hdr *hdr)
{
encode_op_hdr(xdr, OP_RENAME, decode_rename_maxsz, hdr);
encode_string(xdr, oldname->len, oldname->name);
encode_string(xdr, newname->len, newname->name);
}
static void encode_renew(struct xdr_stream *xdr, clientid4 clid,
struct compound_hdr *hdr)
{
encode_op_hdr(xdr, OP_RENEW, decode_renew_maxsz, hdr);
encode_uint64(xdr, clid);
}
static void
encode_restorefh(struct xdr_stream *xdr, struct compound_hdr *hdr)
{
encode_op_hdr(xdr, OP_RESTOREFH, decode_restorefh_maxsz, hdr);
}
static void
encode_setacl(struct xdr_stream *xdr, struct nfs_setaclargs *arg, struct compound_hdr *hdr)
{
__be32 *p;
encode_op_hdr(xdr, OP_SETATTR, decode_setacl_maxsz, hdr);
encode_nfs4_stateid(xdr, &zero_stateid);
p = reserve_space(xdr, 2*4);
*p++ = cpu_to_be32(1);
*p = cpu_to_be32(FATTR4_WORD0_ACL);
BUG_ON(arg->acl_len % 4);
p = reserve_space(xdr, 4);
*p = cpu_to_be32(arg->acl_len);
xdr_write_pages(xdr, arg->acl_pages, arg->acl_pgbase, arg->acl_len);
}
static void
encode_savefh(struct xdr_stream *xdr, struct compound_hdr *hdr)
{
encode_op_hdr(xdr, OP_SAVEFH, decode_savefh_maxsz, hdr);
}
static void encode_setattr(struct xdr_stream *xdr, const struct nfs_setattrargs *arg, const struct nfs_server *server, struct compound_hdr *hdr)
{
encode_op_hdr(xdr, OP_SETATTR, decode_setattr_maxsz, hdr);
encode_nfs4_stateid(xdr, &arg->stateid);
encode_attrs(xdr, arg->iap, server);
}
static void encode_setclientid(struct xdr_stream *xdr, const struct nfs4_setclientid *setclientid, struct compound_hdr *hdr)
{
__be32 *p;
encode_op_hdr(xdr, OP_SETCLIENTID, decode_setclientid_maxsz, hdr);
encode_nfs4_verifier(xdr, setclientid->sc_verifier);
encode_string(xdr, setclientid->sc_name_len, setclientid->sc_name);
p = reserve_space(xdr, 4);
*p = cpu_to_be32(setclientid->sc_prog);
encode_string(xdr, setclientid->sc_netid_len, setclientid->sc_netid);
encode_string(xdr, setclientid->sc_uaddr_len, setclientid->sc_uaddr);
p = reserve_space(xdr, 4);
*p = cpu_to_be32(setclientid->sc_cb_ident);
}
static void encode_setclientid_confirm(struct xdr_stream *xdr, const struct nfs4_setclientid_res *arg, struct compound_hdr *hdr)
{
encode_op_hdr(xdr, OP_SETCLIENTID_CONFIRM,
decode_setclientid_confirm_maxsz, hdr);
encode_uint64(xdr, arg->clientid);
encode_nfs4_verifier(xdr, &arg->confirm);
}
static void encode_write(struct xdr_stream *xdr, const struct nfs_writeargs *args, struct compound_hdr *hdr)
{
__be32 *p;
encode_op_hdr(xdr, OP_WRITE, decode_write_maxsz, hdr);
encode_open_stateid(xdr, args->context, args->lock_context,
FMODE_WRITE, hdr->minorversion);
p = reserve_space(xdr, 16);
p = xdr_encode_hyper(p, args->offset);
*p++ = cpu_to_be32(args->stable);
*p = cpu_to_be32(args->count);
xdr_write_pages(xdr, args->pages, args->pgbase, args->count);
}
static void encode_delegreturn(struct xdr_stream *xdr, const nfs4_stateid *stateid, struct compound_hdr *hdr)
{
encode_op_hdr(xdr, OP_DELEGRETURN, decode_delegreturn_maxsz, hdr);
encode_nfs4_stateid(xdr, stateid);
}
static void encode_secinfo(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
{
encode_op_hdr(xdr, OP_SECINFO, decode_secinfo_maxsz, hdr);
encode_string(xdr, name->len, name->name);
}
#if defined(CONFIG_NFS_V4_1)
/* NFSv4.1 operations */
static void encode_exchange_id(struct xdr_stream *xdr,
struct nfs41_exchange_id_args *args,
struct compound_hdr *hdr)
{
__be32 *p;
char impl_name[NFS4_OPAQUE_LIMIT];
int len = 0;
encode_op_hdr(xdr, OP_EXCHANGE_ID, decode_exchange_id_maxsz, hdr);
encode_nfs4_verifier(xdr, args->verifier);
encode_string(xdr, args->id_len, args->id);
p = reserve_space(xdr, 12);
*p++ = cpu_to_be32(args->flags);
*p++ = cpu_to_be32(0); /* zero length state_protect4_a */
if (send_implementation_id &&
sizeof(CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN) > 1 &&
sizeof(CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN)
<= NFS4_OPAQUE_LIMIT + 1)
len = snprintf(impl_name, sizeof(impl_name), "%s %s %s %s",
utsname()->sysname, utsname()->release,
utsname()->version, utsname()->machine);
if (len > 0) {
*p = cpu_to_be32(1); /* implementation id array length=1 */
encode_string(xdr,
sizeof(CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN) - 1,
CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN);
encode_string(xdr, len, impl_name);
/* just send zeros for nii_date - the date is in nii_name */
p = reserve_space(xdr, 12);
p = xdr_encode_hyper(p, 0);
*p = cpu_to_be32(0);
} else
*p = cpu_to_be32(0); /* implementation id array length=0 */
}
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;
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;
len = scnprintf(machine_name, sizeof(machine_name), "%s",
clp->cl_ipaddr);
encode_op_hdr(xdr, OP_CREATE_SESSION, decode_create_session_maxsz, hdr);
p = reserve_space(xdr, 16 + 2*28 + 20 + len + 12);
p = xdr_encode_hyper(p, clp->cl_clientid);
*p++ = cpu_to_be32(clp->cl_seqid); /*Sequence id */
*p++ = cpu_to_be32(args->flags); /*flags */
/* Fore Channel */
*p++ = cpu_to_be32(0); /* 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 */
*p++ = cpu_to_be32(max_resp_sz_cached); /* Max resp sz cached */
*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 */
/* Back Channel */
*p++ = cpu_to_be32(0); /* 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 */
*p++ = cpu_to_be32(args->cb_program); /* cb_program */
*p++ = cpu_to_be32(1);
*p++ = cpu_to_be32(RPC_AUTH_UNIX); /* auth_sys */
/* authsys_parms rfc1831 */
*p++ = cpu_to_be32((u32)clp->cl_boot_time.tv_nsec); /* stamp */
p = xdr_encode_opaque(p, machine_name, len);
*p++ = cpu_to_be32(0); /* UID */
*p++ = cpu_to_be32(0); /* GID */
*p = cpu_to_be32(0); /* No more gids */
}
static void encode_destroy_session(struct xdr_stream *xdr,
struct nfs4_session *session,
struct compound_hdr *hdr)
{
encode_op_hdr(xdr, OP_DESTROY_SESSION, decode_destroy_session_maxsz, hdr);
encode_opaque_fixed(xdr, session->sess_id.data, NFS4_MAX_SESSIONID_LEN);
}
static void encode_reclaim_complete(struct xdr_stream *xdr,
struct nfs41_reclaim_complete_args *args,
struct compound_hdr *hdr)
{
encode_op_hdr(xdr, OP_RECLAIM_COMPLETE, decode_reclaim_complete_maxsz, hdr);
encode_uint32(xdr, args->one_fs);
}
#endif /* CONFIG_NFS_V4_1 */
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;
struct nfs4_slot_table *tp;
struct nfs4_slot *slot;
__be32 *p;
if (!session)
return;
tp = &session->fc_slot_table;
WARN_ON(args->sa_slotid == NFS4_MAX_SLOT_TABLE);
slot = tp->slots + args->sa_slotid;
encode_op_hdr(xdr, OP_SEQUENCE, decode_sequence_maxsz, hdr);
/*
* 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);
p = reserve_space(xdr, NFS4_MAX_SESSIONID_LEN + 16);
p = xdr_encode_opaque_fixed(p, session->sess_id.data, NFS4_MAX_SESSIONID_LEN);
*p++ = cpu_to_be32(slot->seq_nr);
*p++ = cpu_to_be32(args->sa_slotid);
*p++ = cpu_to_be32(tp->highest_used_slotid);
*p = cpu_to_be32(args->sa_cache_this);
#endif /* CONFIG_NFS_V4_1 */
}
#ifdef CONFIG_NFS_V4_1
static void
encode_getdevicelist(struct xdr_stream *xdr,
const struct nfs4_getdevicelist_args *args,
struct compound_hdr *hdr)
{
__be32 *p;
nfs4_verifier dummy = {
.data = "dummmmmy",
};
encode_op_hdr(xdr, OP_GETDEVICELIST, decode_getdevicelist_maxsz, hdr);
p = reserve_space(xdr, 16);
*p++ = cpu_to_be32(args->layoutclass);
*p++ = cpu_to_be32(NFS4_PNFS_GETDEVLIST_MAXNUM);
xdr_encode_hyper(p, 0ULL); /* cookie */
encode_nfs4_verifier(xdr, &dummy);
}
static void
encode_getdeviceinfo(struct xdr_stream *xdr,
const struct nfs4_getdeviceinfo_args *args,
struct compound_hdr *hdr)
{
__be32 *p;
encode_op_hdr(xdr, OP_GETDEVICEINFO, decode_getdeviceinfo_maxsz, hdr);
p = reserve_space(xdr, 12 + NFS4_DEVICEID4_SIZE);
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 */
}
static void
encode_layoutget(struct xdr_stream *xdr,
const struct nfs4_layoutget_args *args,
struct compound_hdr *hdr)
{
__be32 *p;
encode_op_hdr(xdr, OP_LAYOUTGET, decode_layoutget_maxsz, hdr);
p = reserve_space(xdr, 36);
*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);
encode_nfs4_stateid(xdr, &args->stateid);
encode_uint32(xdr, 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);
}
static int
encode_layoutcommit(struct xdr_stream *xdr,
struct inode *inode,
const struct nfs4_layoutcommit_args *args,
struct compound_hdr *hdr)
{
__be32 *p;
dprintk("%s: lbw: %llu type: %d\n", __func__, args->lastbytewritten,
NFS_SERVER(args->inode)->pnfs_curr_ld->id);
encode_op_hdr(xdr, OP_LAYOUTCOMMIT, decode_layoutcommit_maxsz, hdr);
p = reserve_space(xdr, 20);
/* Only whole file layouts */
p = xdr_encode_hyper(p, 0); /* offset */
p = xdr_encode_hyper(p, args->lastbytewritten + 1); /* length */
*p = cpu_to_be32(0); /* reclaim */
encode_nfs4_stateid(xdr, &args->stateid);
p = reserve_space(xdr, 20);
*p++ = cpu_to_be32(1); /* newoffset = TRUE */
p = xdr_encode_hyper(p, args->lastbytewritten);
*p++ = cpu_to_be32(0); /* Never send time_modify_changed */
*p++ = cpu_to_be32(NFS_SERVER(args->inode)->pnfs_curr_ld->id);/* type */
if (NFS_SERVER(inode)->pnfs_curr_ld->encode_layoutcommit)
NFS_SERVER(inode)->pnfs_curr_ld->encode_layoutcommit(
NFS_I(inode)->layout, xdr, args);
else
encode_uint32(xdr, 0); /* no layout-type payload */
return 0;
}
static void
encode_layoutreturn(struct xdr_stream *xdr,
const struct nfs4_layoutreturn_args *args,
struct compound_hdr *hdr)
{
__be32 *p;
encode_op_hdr(xdr, OP_LAYOUTRETURN, decode_layoutreturn_maxsz, hdr);
p = reserve_space(xdr, 16);
*p++ = cpu_to_be32(0); /* reclaim. always 0 for now */
*p++ = cpu_to_be32(args->layout_type);
*p++ = cpu_to_be32(IOMODE_ANY);
*p = cpu_to_be32(RETURN_FILE);
p = reserve_space(xdr, 16);
p = xdr_encode_hyper(p, 0);
p = xdr_encode_hyper(p, NFS4_MAX_UINT64);
spin_lock(&args->inode->i_lock);
encode_nfs4_stateid(xdr, &args->stateid);
spin_unlock(&args->inode->i_lock);
if (NFS_SERVER(args->inode)->pnfs_curr_ld->encode_layoutreturn) {
NFS_SERVER(args->inode)->pnfs_curr_ld->encode_layoutreturn(
NFS_I(args->inode)->layout, xdr, args);
} else
encode_uint32(xdr, 0);
}
static int
encode_secinfo_no_name(struct xdr_stream *xdr,
const struct nfs41_secinfo_no_name_args *args,
struct compound_hdr *hdr)
{
encode_op_hdr(xdr, OP_SECINFO_NO_NAME, decode_secinfo_no_name_maxsz, hdr);
encode_uint32(xdr, args->style);
return 0;
}
static void encode_test_stateid(struct xdr_stream *xdr,
struct nfs41_test_stateid_args *args,
struct compound_hdr *hdr)
{
encode_op_hdr(xdr, OP_TEST_STATEID, decode_test_stateid_maxsz, hdr);
encode_uint32(xdr, 1);
encode_nfs4_stateid(xdr, args->stateid);
}
static void encode_free_stateid(struct xdr_stream *xdr,
struct nfs41_free_stateid_args *args,
struct compound_hdr *hdr)
{
encode_op_hdr(xdr, OP_FREE_STATEID, decode_free_stateid_maxsz, hdr);
encode_nfs4_stateid(xdr, args->stateid);
}
#endif /* CONFIG_NFS_V4_1 */
/*
* END OF "GENERIC" ENCODE ROUTINES.
*/
static u32 nfs4_xdr_minorversion(const struct nfs4_sequence_args *args)
{
#if defined(CONFIG_NFS_V4_1)
if (args->sa_session)
return args->sa_session->clp->cl_mvops->minor_version;
#endif /* CONFIG_NFS_V4_1 */
return 0;
}
/*
* Encode an ACCESS request
*/
static void nfs4_xdr_enc_access(struct rpc_rqst *req, struct xdr_stream *xdr,
const struct nfs4_accessargs *args)
{
struct compound_hdr hdr = {
.minorversion = nfs4_xdr_minorversion(&args->seq_args),
};
encode_compound_hdr(xdr, req, &hdr);
encode_sequence(xdr, &args->seq_args, &hdr);
encode_putfh(xdr, args->fh, &hdr);
encode_access(xdr, args->access, &hdr);
encode_getfattr(xdr, args->bitmask, &hdr);
encode_nops(&hdr);
}
/*
* Encode LOOKUP request
*/
static void nfs4_xdr_enc_lookup(struct rpc_rqst *req, struct xdr_stream *xdr,
const struct nfs4_lookup_arg *args)
{
struct compound_hdr hdr = {
.minorversion = nfs4_xdr_minorversion(&args->seq_args),
};
encode_compound_hdr(xdr, req, &hdr);
encode_sequence(xdr, &args->seq_args, &hdr);
encode_putfh(xdr, args->dir_fh, &hdr);
encode_lookup(xdr, args->name, &hdr);
encode_getfh(xdr, &hdr);
encode_getfattr(xdr, args->bitmask, &hdr);
encode_nops(&hdr);
}
/*
* Encode LOOKUP_ROOT request
*/
static void nfs4_xdr_enc_lookup_root(struct rpc_rqst *req,
struct xdr_stream *xdr,
const struct nfs4_lookup_root_arg *args)
{
struct compound_hdr hdr = {
.minorversion = nfs4_xdr_minorversion(&args->seq_args),
};
encode_compound_hdr(xdr, req, &hdr);
encode_sequence(xdr, &args->seq_args, &hdr);
encode_putrootfh(xdr, &hdr);
encode_getfh(xdr, &hdr);
encode_getfattr(xdr, args->bitmask, &hdr);
encode_nops(&hdr);
}
/*
* Encode REMOVE request
*/
static void nfs4_xdr_enc_remove(struct rpc_rqst *req, struct xdr_stream *xdr,
const struct nfs_removeargs *args)
{
struct compound_hdr hdr = {
.minorversion = nfs4_xdr_minorversion(&args->seq_args),
};
encode_compound_hdr(xdr, req, &hdr);
encode_sequence(xdr, &args->seq_args, &hdr);
encode_putfh(xdr, args->fh, &hdr);
encode_remove(xdr, &args->name, &hdr);
encode_getfattr(xdr, args->bitmask, &hdr);
encode_nops(&hdr);
}
/*
* Encode RENAME request
*/
static void nfs4_xdr_enc_rename(struct rpc_rqst *req, struct xdr_stream *xdr,
const struct nfs_renameargs *args)
{
struct compound_hdr hdr = {
.minorversion = nfs4_xdr_minorversion(&args->seq_args),
};
encode_compound_hdr(xdr, req, &hdr);
encode_sequence(xdr, &args->seq_args, &hdr);
encode_putfh(xdr, args->old_dir, &hdr);
encode_savefh(xdr, &hdr);
encode_putfh(xdr, args->new_dir, &hdr);
encode_rename(xdr, args->old_name, args->new_name, &hdr);
encode_getfattr(xdr, args->bitmask, &hdr);
encode_restorefh(xdr, &hdr);
encode_getfattr(xdr, args->bitmask, &hdr);
encode_nops(&hdr);
}
/*
* Encode LINK request
*/
static void nfs4_xdr_enc_link(struct rpc_rqst *req, struct xdr_stream *xdr,
const struct nfs4_link_arg *args)
{
struct compound_hdr hdr = {
.minorversion = nfs4_xdr_minorversion(&args->seq_args),
};
encode_compound_hdr(xdr, req, &hdr);
encode_sequence(xdr, &args->seq_args, &hdr);
encode_putfh(xdr, args->fh, &hdr);
encode_savefh(xdr, &hdr);
encode_putfh(xdr, args->dir_fh, &hdr);
encode_link(xdr, args->name, &hdr);
encode_getfattr(xdr, args->bitmask, &hdr);
encode_restorefh(xdr, &hdr);
encode_getfattr(xdr, args->bitmask, &hdr);
encode_nops(&hdr);
}
/*
* Encode CREATE request
*/
static void nfs4_xdr_enc_create(struct rpc_rqst *req, struct xdr_stream *xdr,
const struct nfs4_create_arg *args)
{
struct compound_hdr hdr = {
.minorversion = nfs4_xdr_minorversion(&args->seq_args),
};
encode_compound_hdr(xdr, req, &hdr);
encode_sequence(xdr, &args->seq_args, &hdr);
encode_putfh(xdr, args->dir_fh, &hdr);
encode_savefh(xdr, &hdr);
encode_create(xdr, args, &hdr);
encode_getfh(xdr, &hdr);
encode_getfattr(xdr, args->bitmask, &hdr);
encode_restorefh(xdr, &hdr);
encode_getfattr(xdr, args->bitmask, &hdr);
encode_nops(&hdr);
}
/*
* Encode SYMLINK request
*/
static void nfs4_xdr_enc_symlink(struct rpc_rqst *req, struct xdr_stream *xdr,
const struct nfs4_create_arg *args)
{
nfs4_xdr_enc_create(req, xdr, args);
}
/*
* Encode GETATTR request
*/
static void nfs4_xdr_enc_getattr(struct rpc_rqst *req, struct xdr_stream *xdr,
const struct nfs4_getattr_arg *args)
{
struct compound_hdr hdr = {
.minorversion = nfs4_xdr_minorversion(&args->seq_args),
};
encode_compound_hdr(xdr, req, &hdr);
encode_sequence(xdr, &args->seq_args, &hdr);
encode_putfh(xdr, args->fh, &hdr);
encode_getfattr(xdr, args->bitmask, &hdr);
encode_nops(&hdr);
}
/*
* Encode a CLOSE request
*/
static void nfs4_xdr_enc_close(struct rpc_rqst *req, struct xdr_stream *xdr,
struct nfs_closeargs *args)
{
struct compound_hdr hdr = {
.minorversion = nfs4_xdr_minorversion(&args->seq_args),
};
encode_compound_hdr(xdr, req, &hdr);
encode_sequence(xdr, &args->seq_args, &hdr);
encode_putfh(xdr, args->fh, &hdr);
encode_close(xdr, args, &hdr);
encode_getfattr(xdr, args->bitmask, &hdr);
encode_nops(&hdr);
}
/*
* Encode an OPEN request
*/
static void nfs4_xdr_enc_open(struct rpc_rqst *req, struct xdr_stream *xdr,
struct nfs_openargs *args)
{
struct compound_hdr hdr = {
.minorversion = nfs4_xdr_minorversion(&args->seq_args),
};
encode_compound_hdr(xdr, req, &hdr);
encode_sequence(xdr, &args->seq_args, &hdr);
encode_putfh(xdr, args->fh, &hdr);
encode_savefh(xdr, &hdr);
encode_open(xdr, args, &hdr);
encode_getfh(xdr, &hdr);
encode_getfattr(xdr, args->bitmask, &hdr);
encode_restorefh(xdr, &hdr);
encode_getfattr(xdr, args->dir_bitmask, &hdr);
encode_nops(&hdr);
}
/*
* Encode an OPEN_CONFIRM request
*/
static void nfs4_xdr_enc_open_confirm(struct rpc_rqst *req,
struct xdr_stream *xdr,
struct nfs_open_confirmargs *args)
{
struct compound_hdr hdr = {
.nops = 0,
};
encode_compound_hdr(xdr, req, &hdr);
encode_putfh(xdr, args->fh, &hdr);
encode_open_confirm(xdr, args, &hdr);
encode_nops(&hdr);
}
/*
* Encode an OPEN request with no attributes.
*/
static void nfs4_xdr_enc_open_noattr(struct rpc_rqst *req,
struct xdr_stream *xdr,
struct nfs_openargs *args)
{
struct compound_hdr hdr = {
.minorversion = nfs4_xdr_minorversion(&args->seq_args),
};
encode_compound_hdr(xdr, req, &hdr);
encode_sequence(xdr, &args->seq_args, &hdr);
encode_putfh(xdr, args->fh, &hdr);
encode_open(xdr, args, &hdr);
encode_getfattr(xdr, args->bitmask, &hdr);
encode_nops(&hdr);
}
/*
* Encode an OPEN_DOWNGRADE request
*/
static void nfs4_xdr_enc_open_downgrade(struct rpc_rqst *req,
struct xdr_stream *xdr,
struct nfs_closeargs *args)
{
struct compound_hdr hdr = {
.minorversion = nfs4_xdr_minorversion(&args->seq_args),
};
encode_compound_hdr(xdr, req, &hdr);
encode_sequence(xdr, &args->seq_args, &hdr);
encode_putfh(xdr, args->fh, &hdr);
encode_open_downgrade(xdr, args, &hdr);
encode_getfattr(xdr, args->bitmask, &hdr);
encode_nops(&hdr);
}
/*
* Encode a LOCK request
*/
static void nfs4_xdr_enc_lock(struct rpc_rqst *req, struct xdr_stream *xdr,
struct nfs_lock_args *args)
{
struct compound_hdr hdr = {
.minorversion = nfs4_xdr_minorversion(&args->seq_args),
};
encode_compound_hdr(xdr, req, &hdr);
encode_sequence(xdr, &args->seq_args, &hdr);
encode_putfh(xdr, args->fh, &hdr);
encode_lock(xdr, args, &hdr);
encode_nops(&hdr);
}
/*
* Encode a LOCKT request
*/
static void nfs4_xdr_enc_lockt(struct rpc_rqst *req, struct xdr_stream *xdr,
struct nfs_lockt_args *args)
{
struct compound_hdr hdr = {
.minorversion = nfs4_xdr_minorversion(&args->seq_args),
};
encode_compound_hdr(xdr, req, &hdr);
encode_sequence(xdr, &args->seq_args, &hdr);
encode_putfh(xdr, args->fh, &hdr);
encode_lockt(xdr, args, &hdr);
encode_nops(&hdr);
}
/*
* Encode a LOCKU request
*/
static void nfs4_xdr_enc_locku(struct rpc_rqst *req, struct xdr_stream *xdr,
struct nfs_locku_args *args)
{
struct compound_hdr hdr = {
.minorversion = nfs4_xdr_minorversion(&args->seq_args),
};
encode_compound_hdr(xdr, req, &hdr);
encode_sequence(xdr, &args->seq_args, &hdr);
encode_putfh(xdr, args->fh, &hdr);
encode_locku(xdr, args, &hdr);
encode_nops(&hdr);
}
static void nfs4_xdr_enc_release_lockowner(struct rpc_rqst *req,
struct xdr_stream *xdr,
struct nfs_release_lockowner_args *args)
{
struct compound_hdr hdr = {
.minorversion = 0,
};
encode_compound_hdr(xdr, req, &hdr);
encode_release_lockowner(xdr, &args->lock_owner, &hdr);
encode_nops(&hdr);
}
/*
* Encode a READLINK request
*/
static void nfs4_xdr_enc_readlink(struct rpc_rqst *req, struct xdr_stream *xdr,
const struct nfs4_readlink *args)
{
struct compound_hdr hdr = {
.minorversion = nfs4_xdr_minorversion(&args->seq_args),
};
encode_compound_hdr(xdr, req, &hdr);
encode_sequence(xdr, &args->seq_args, &hdr);
encode_putfh(xdr, args->fh, &hdr);
encode_readlink(xdr, args, req, &hdr);
xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2, args->pages,
args->pgbase, args->pglen);
encode_nops(&hdr);
}
/*
* Encode a READDIR request
*/
static void nfs4_xdr_enc_readdir(struct rpc_rqst *req, struct xdr_stream *xdr,
const struct nfs4_readdir_arg *args)
{
struct compound_hdr hdr = {
.minorversion = nfs4_xdr_minorversion(&args->seq_args),
};
encode_compound_hdr(xdr, req, &hdr);
encode_sequence(xdr, &args->seq_args, &hdr);
encode_putfh(xdr, args->fh, &hdr);
encode_readdir(xdr, args, req, &hdr);
xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2, args->pages,
args->pgbase, args->count);
dprintk("%s: inlined page args = (%u, %p, %u, %u)\n",
__func__, hdr.replen << 2, args->pages,
args->pgbase, args->count);
encode_nops(&hdr);
}
/*
* Encode a READ request
*/
static void nfs4_xdr_enc_read(struct rpc_rqst *req, struct xdr_stream *xdr,
struct nfs_readargs *args)
{
struct compound_hdr hdr = {
.minorversion = nfs4_xdr_minorversion(&args->seq_args),
};
encode_compound_hdr(xdr, req, &hdr);
encode_sequence(xdr, &args->seq_args, &hdr);
encode_putfh(xdr, args->fh, &hdr);
encode_read(xdr, args, &hdr);
xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2,
args->pages, args->pgbase, args->count);
req->rq_rcv_buf.flags |= XDRBUF_READ;
encode_nops(&hdr);
}
/*
* Encode an SETATTR request
*/
static void nfs4_xdr_enc_setattr(struct rpc_rqst *req, struct xdr_stream *xdr,
struct nfs_setattrargs *args)
{
struct compound_hdr hdr = {
.minorversion = nfs4_xdr_minorversion(&args->seq_args),
};
encode_compound_hdr(xdr, req, &hdr);
encode_sequence(xdr, &args->seq_args, &hdr);
encode_putfh(xdr, args->fh, &hdr);
encode_setattr(xdr, args, args->server, &hdr);
encode_getfattr(xdr, args->bitmask, &hdr);
encode_nops(&hdr);
}
/*
* Encode a GETACL request
*/
static void nfs4_xdr_enc_getacl(struct rpc_rqst *req, struct xdr_stream *xdr,
struct nfs_getaclargs *args)
{
struct compound_hdr hdr = {
.minorversion = nfs4_xdr_minorversion(&args->seq_args),
};
uint32_t replen;
encode_compound_hdr(xdr, req, &hdr);
encode_sequence(xdr, &args->seq_args, &hdr);
encode_putfh(xdr, args->fh, &hdr);
replen = hdr.replen + op_decode_hdr_maxsz + 1;
encode_getattr_two(xdr, FATTR4_WORD0_ACL, 0, &hdr);
xdr_inline_pages(&req->rq_rcv_buf, replen << 2,
args->acl_pages, args->acl_pgbase, args->acl_len);
encode_nops(&hdr);
}
/*
* Encode a WRITE request
*/
static void nfs4_xdr_enc_write(struct rpc_rqst *req, struct xdr_stream *xdr,
struct nfs_writeargs *args)
{
struct compound_hdr hdr = {
.minorversion = nfs4_xdr_minorversion(&args->seq_args),
};
encode_compound_hdr(xdr, req, &hdr);
encode_sequence(xdr, &args->seq_args, &hdr);
encode_putfh(xdr, args->fh, &hdr);
encode_write(xdr, args, &hdr);
req->rq_snd_buf.flags |= XDRBUF_WRITE;
if (args->bitmask)
encode_getfattr(xdr, args->bitmask, &hdr);
encode_nops(&hdr);
}
/*
* a COMMIT request
*/
static void nfs4_xdr_enc_commit(struct rpc_rqst *req, struct xdr_stream *xdr,
struct nfs_writeargs *args)
{
struct compound_hdr hdr = {
.minorversion = nfs4_xdr_minorversion(&args->seq_args),
};
encode_compound_hdr(xdr, req, &hdr);
encode_sequence(xdr, &args->seq_args, &hdr);
encode_putfh(xdr, args->fh, &hdr);
encode_commit(xdr, args, &hdr);
if (args->bitmask)
encode_getfattr(xdr, args->bitmask, &hdr);
encode_nops(&hdr);
}
/*
* FSINFO request
*/
static void nfs4_xdr_enc_fsinfo(struct rpc_rqst *req, struct xdr_stream *xdr,
struct nfs4_fsinfo_arg *args)
{
struct compound_hdr hdr = {
.minorversion = nfs4_xdr_minorversion(&args->seq_args),
};
encode_compound_hdr(xdr, req, &hdr);
encode_sequence(xdr, &args->seq_args, &hdr);
encode_putfh(xdr, args->fh, &hdr);
encode_fsinfo(xdr, args->bitmask, &hdr);
encode_nops(&hdr);
}
/*
* a PATHCONF request
*/
static void nfs4_xdr_enc_pathconf(struct rpc_rqst *req, struct xdr_stream *xdr,
const struct nfs4_pathconf_arg *args)
{
struct compound_hdr hdr = {
.minorversion = nfs4_xdr_minorversion(&args->seq_args),
};
encode_compound_hdr(xdr, req, &hdr);
encode_sequence(xdr, &args->seq_args, &hdr);
encode_putfh(xdr, args->fh, &hdr);
encode_getattr_one(xdr, args->bitmask[0] & nfs4_pathconf_bitmap[0],
&hdr);
encode_nops(&hdr);
}
/*
* a STATFS request
*/
static void nfs4_xdr_enc_statfs(struct rpc_rqst *req, struct xdr_stream *xdr,
const struct nfs4_statfs_arg *args)
{
struct compound_hdr hdr = {
.minorversion = nfs4_xdr_minorversion(&args->seq_args),
};
encode_compound_hdr(xdr, req, &hdr);
encode_sequence(xdr, &args->seq_args, &hdr);
encode_putfh(xdr, args->fh, &hdr);
encode_getattr_two(xdr, args->bitmask[0] & nfs4_statfs_bitmap[0],
args->bitmask[1] & nfs4_statfs_bitmap[1], &hdr);
encode_nops(&hdr);
}
/*
* GETATTR_BITMAP request
*/
static void nfs4_xdr_enc_server_caps(struct rpc_rqst *req,
struct xdr_stream *xdr,
struct nfs4_server_caps_arg *args)
{
struct compound_hdr hdr = {
.minorversion = nfs4_xdr_minorversion(&args->seq_args),
};
encode_compound_hdr(xdr, req, &hdr);
encode_sequence(xdr, &args->seq_args, &hdr);
encode_putfh(xdr, args->fhandle, &hdr);
encode_getattr_one(xdr, FATTR4_WORD0_SUPPORTED_ATTRS|
FATTR4_WORD0_FH_EXPIRE_TYPE|
FATTR4_WORD0_LINK_SUPPORT|
FATTR4_WORD0_SYMLINK_SUPPORT|
FATTR4_WORD0_ACLSUPPORT, &hdr);
encode_nops(&hdr);
}
/*
* a RENEW request
*/
static void nfs4_xdr_enc_renew(struct rpc_rqst *req, struct xdr_stream *xdr,
struct nfs_client *clp)
{
struct compound_hdr hdr = {
.nops = 0,
};
encode_compound_hdr(xdr, req, &hdr);
encode_renew(xdr, clp->cl_clientid, &hdr);
encode_nops(&hdr);
}
/*
* a SETCLIENTID request
*/
static void nfs4_xdr_enc_setclientid(struct rpc_rqst *req,
struct xdr_stream *xdr,
struct nfs4_setclientid *sc)
{
struct compound_hdr hdr = {
.nops = 0,
};
encode_compound_hdr(xdr, req, &hdr);
encode_setclientid(xdr, sc, &hdr);
encode_nops(&hdr);
}
/*
* a SETCLIENTID_CONFIRM request
*/
static void nfs4_xdr_enc_setclientid_confirm(struct rpc_rqst *req,
struct xdr_stream *xdr,
struct nfs4_setclientid_res *arg)
{
struct compound_hdr hdr = {
.nops = 0,
};
const u32 lease_bitmap[3] = { FATTR4_WORD0_LEASE_TIME };
encode_compound_hdr(xdr, req, &hdr);
encode_setclientid_confirm(xdr, arg, &hdr);
encode_putrootfh(xdr, &hdr);
encode_fsinfo(xdr, lease_bitmap, &hdr);
encode_nops(&hdr);
}
/*
* DELEGRETURN request
*/
static void nfs4_xdr_enc_delegreturn(struct rpc_rqst *req,
struct xdr_stream *xdr,
const struct nfs4_delegreturnargs *args)
{
struct compound_hdr hdr = {
.minorversion = nfs4_xdr_minorversion(&args->seq_args),
};
encode_compound_hdr(xdr, req, &hdr);
encode_sequence(xdr, &args->seq_args, &hdr);
encode_putfh(xdr, args->fhandle, &hdr);
encode_delegreturn(xdr, args->stateid, &hdr);
encode_getfattr(xdr, args->bitmask, &hdr);
encode_nops(&hdr);
}
/*
* Encode FS_LOCATIONS request
*/
static void nfs4_xdr_enc_fs_locations(struct rpc_rqst *req,
struct xdr_stream *xdr,
struct nfs4_fs_locations_arg *args)
{
struct compound_hdr hdr = {
.minorversion = nfs4_xdr_minorversion(&args->seq_args),
};
uint32_t replen;
encode_compound_hdr(xdr, req, &hdr);
encode_sequence(xdr, &args->seq_args, &hdr);
encode_putfh(xdr, args->dir_fh, &hdr);
encode_lookup(xdr, args->name, &hdr);
replen = hdr.replen; /* get the attribute into args->page */
encode_fs_locations(xdr, args->bitmask, &hdr);
xdr_inline_pages(&req->rq_rcv_buf, replen << 2, &args->page,
0, PAGE_SIZE);
encode_nops(&hdr);
}
/*
* Encode SECINFO request
*/
static void nfs4_xdr_enc_secinfo(struct rpc_rqst *req,
struct xdr_stream *xdr,
struct nfs4_secinfo_arg *args)
{
struct compound_hdr hdr = {
.minorversion = nfs4_xdr_minorversion(&args->seq_args),
};
encode_compound_hdr(xdr, req, &hdr);
encode_sequence(xdr, &args->seq_args, &hdr);
encode_putfh(xdr, args->dir_fh, &hdr);
encode_secinfo(xdr, args->name, &hdr);
encode_nops(&hdr);
}
#if defined(CONFIG_NFS_V4_1)
/*
* EXCHANGE_ID request
*/
static void nfs4_xdr_enc_exchange_id(struct rpc_rqst *req,
struct xdr_stream *xdr,
struct nfs41_exchange_id_args *args)
{
struct compound_hdr hdr = {
.minorversion = args->client->cl_mvops->minor_version,
};
encode_compound_hdr(xdr, req, &hdr);
encode_exchange_id(xdr, args, &hdr);
encode_nops(&hdr);
}
/*
* a CREATE_SESSION request
*/
static void nfs4_xdr_enc_create_session(struct rpc_rqst *req,
struct xdr_stream *xdr,
struct nfs41_create_session_args *args)
{
struct compound_hdr hdr = {
.minorversion = args->client->cl_mvops->minor_version,
};
encode_compound_hdr(xdr, req, &hdr);
encode_create_session(xdr, args, &hdr);
encode_nops(&hdr);
}
/*
* a DESTROY_SESSION request
*/
static void nfs4_xdr_enc_destroy_session(struct rpc_rqst *req,
struct xdr_stream *xdr,
struct nfs4_session *session)
{
struct compound_hdr hdr = {
.minorversion = session->clp->cl_mvops->minor_version,
};
encode_compound_hdr(xdr, req, &hdr);
encode_destroy_session(xdr, session, &hdr);
encode_nops(&hdr);
}
/*
* a SEQUENCE request
*/
static void nfs4_xdr_enc_sequence(struct rpc_rqst *req, struct xdr_stream *xdr,
struct nfs4_sequence_args *args)
{
struct compound_hdr hdr = {
.minorversion = nfs4_xdr_minorversion(args),
};
encode_compound_hdr(xdr, req, &hdr);
encode_sequence(xdr, args, &hdr);
encode_nops(&hdr);
}
/*
* a GET_LEASE_TIME request
*/
static void nfs4_xdr_enc_get_lease_time(struct rpc_rqst *req,
struct xdr_stream *xdr,
struct nfs4_get_lease_time_args *args)
{
struct compound_hdr hdr = {
.minorversion = nfs4_xdr_minorversion(&args->la_seq_args),
};
const u32 lease_bitmap[3] = { FATTR4_WORD0_LEASE_TIME };
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);
}
/*
* a RECLAIM_COMPLETE request
*/
static void nfs4_xdr_enc_reclaim_complete(struct rpc_rqst *req,
struct xdr_stream *xdr,
struct nfs41_reclaim_complete_args *args)
{
struct compound_hdr hdr = {
.minorversion = nfs4_xdr_minorversion(&args->seq_args)
};
encode_compound_hdr(xdr, req, &hdr);
encode_sequence(xdr, &args->seq_args, &hdr);
encode_reclaim_complete(xdr, args, &hdr);
encode_nops(&hdr);
}
/*
* Encode GETDEVICELIST request
*/
static void nfs4_xdr_enc_getdevicelist(struct rpc_rqst *req,
struct xdr_stream *xdr,
struct nfs4_getdevicelist_args *args)
{
struct compound_hdr hdr = {
.minorversion = nfs4_xdr_minorversion(&args->seq_args),
};
encode_compound_hdr(xdr, req, &hdr);
encode_sequence(xdr, &args->seq_args, &hdr);
encode_putfh(xdr, args->fh, &hdr);
encode_getdevicelist(xdr, args, &hdr);
encode_nops(&hdr);
}
/*
* Encode GETDEVICEINFO request
*/
static void nfs4_xdr_enc_getdeviceinfo(struct rpc_rqst *req,
struct xdr_stream *xdr,
struct nfs4_getdeviceinfo_args *args)
{
struct compound_hdr hdr = {
.minorversion = nfs4_xdr_minorversion(&args->seq_args),
};
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);
}
/*
* Encode LAYOUTGET request
*/
static void nfs4_xdr_enc_layoutget(struct rpc_rqst *req,
struct xdr_stream *xdr,
struct nfs4_layoutget_args *args)
{
struct compound_hdr hdr = {
.minorversion = nfs4_xdr_minorversion(&args->seq_args),
};
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);
xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2,
args->layout.pages, 0, args->layout.pglen);
encode_nops(&hdr);
}
/*
* Encode LAYOUTCOMMIT request
*/
static void nfs4_xdr_enc_layoutcommit(struct rpc_rqst *req,
struct xdr_stream *xdr,
struct nfs4_layoutcommit_args *args)
{
struct nfs4_layoutcommit_data *data =
container_of(args, struct nfs4_layoutcommit_data, args);
struct compound_hdr hdr = {
.minorversion = nfs4_xdr_minorversion(&args->seq_args),
};
encode_compound_hdr(xdr, req, &hdr);
encode_sequence(xdr, &args->seq_args, &hdr);
encode_putfh(xdr, NFS_FH(args->inode), &hdr);
encode_layoutcommit(xdr, data->args.inode, args, &hdr);
encode_getfattr(xdr, args->bitmask, &hdr);
encode_nops(&hdr);
}
/*
* Encode LAYOUTRETURN request
*/
static void nfs4_xdr_enc_layoutreturn(struct rpc_rqst *req,
struct xdr_stream *xdr,
struct nfs4_layoutreturn_args *args)
{
struct compound_hdr hdr = {
.minorversion = nfs4_xdr_minorversion(&args->seq_args),
};
encode_compound_hdr(xdr, req, &hdr);
encode_sequence(xdr, &args->seq_args, &hdr);
encode_putfh(xdr, NFS_FH(args->inode), &hdr);
encode_layoutreturn(xdr, args, &hdr);
encode_nops(&hdr);
}
/*
* Encode SECINFO_NO_NAME request
*/
static int nfs4_xdr_enc_secinfo_no_name(struct rpc_rqst *req,
struct xdr_stream *xdr,
struct nfs41_secinfo_no_name_args *args)
{
struct compound_hdr hdr = {
.minorversion = nfs4_xdr_minorversion(&args->seq_args),
};
encode_compound_hdr(xdr, req, &hdr);
encode_sequence(xdr, &args->seq_args, &hdr);
encode_putrootfh(xdr, &hdr);
encode_secinfo_no_name(xdr, args, &hdr);
encode_nops(&hdr);
return 0;
}
/*
* Encode TEST_STATEID request
*/
static void nfs4_xdr_enc_test_stateid(struct rpc_rqst *req,
struct xdr_stream *xdr,
struct nfs41_test_stateid_args *args)
{
struct compound_hdr hdr = {
.minorversion = nfs4_xdr_minorversion(&args->seq_args),
};
encode_compound_hdr(xdr, req, &hdr);
encode_sequence(xdr, &args->seq_args, &hdr);
encode_test_stateid(xdr, args, &hdr);
encode_nops(&hdr);
}
/*
* Encode FREE_STATEID request
*/
static void nfs4_xdr_enc_free_stateid(struct rpc_rqst *req,
struct xdr_stream *xdr,
struct nfs41_free_stateid_args *args)
{
struct compound_hdr hdr = {
.minorversion = nfs4_xdr_minorversion(&args->seq_args),
};
encode_compound_hdr(xdr, req, &hdr);
encode_sequence(xdr, &args->seq_args, &hdr);
encode_free_stateid(xdr, args, &hdr);
encode_nops(&hdr);
}
#endif /* CONFIG_NFS_V4_1 */
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);
}
static int decode_opaque_inline(struct xdr_stream *xdr, unsigned int *len, char **string)
{
__be32 *p;
p = xdr_inline_decode(xdr, 4);
if (unlikely(!p))
goto out_overflow;
*len = be32_to_cpup(p);
p = xdr_inline_decode(xdr, *len);
if (unlikely(!p))
goto out_overflow;
*string = (char *)p;
return 0;
out_overflow:
print_overflow_msg(__func__, xdr);
return -EIO;
}
static int decode_compound_hdr(struct xdr_stream *xdr, struct compound_hdr *hdr)
{
__be32 *p;
p = xdr_inline_decode(xdr, 8);
if (unlikely(!p))
goto out_overflow;
hdr->status = be32_to_cpup(p++);
hdr->taglen = be32_to_cpup(p);
p = xdr_inline_decode(xdr, hdr->taglen + 4);
if (unlikely(!p))
goto out_overflow;
hdr->tag = (char *)p;
p += XDR_QUADLEN(hdr->taglen);
hdr->nops = be32_to_cpup(p);
if (unlikely(hdr->nops < 1))
return nfs4_stat_to_errno(hdr->status);
return 0;
out_overflow:
print_overflow_msg(__func__, xdr);
return -EIO;
}
static int decode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 expected)
{
__be32 *p;
uint32_t opnum;
int32_t nfserr;
p = xdr_inline_decode(xdr, 8);
if (unlikely(!p))
goto out_overflow;
opnum = be32_to_cpup(p++);
if (opnum != expected) {
dprintk("nfs: Server returned operation"
" %d but we issued a request for %d\n",
opnum, expected);
return -EIO;
}
nfserr = be32_to_cpup(p);
if (nfserr != NFS_OK)
return nfs4_stat_to_errno(nfserr);
return 0;
out_overflow:
print_overflow_msg(__func__, xdr);
return -EIO;
}
/* Dummy routine */
static int decode_ace(struct xdr_stream *xdr, void *ace, struct nfs_client *clp)
{
__be32 *p;
unsigned int strlen;
char *str;
p = xdr_inline_decode(xdr, 12);
if (likely(p))
return decode_opaque_inline(xdr, &strlen, &str);
print_overflow_msg(__func__, xdr);
return -EIO;
}
static int decode_attr_bitmap(struct xdr_stream *xdr, uint32_t *bitmap)
{
uint32_t bmlen;
__be32 *p;
p = xdr_inline_decode(xdr, 4);
if (unlikely(!p))
goto out_overflow;
bmlen = be32_to_cpup(p);
bitmap[0] = bitmap[1] = bitmap[2] = 0;
p = xdr_inline_decode(xdr, (bmlen << 2));
if (unlikely(!p))
goto out_overflow;
if (bmlen > 0) {
bitmap[0] = be32_to_cpup(p++);
if (bmlen > 1) {
bitmap[1] = be32_to_cpup(p++);
if (bmlen > 2)
bitmap[2] = be32_to_cpup(p);
}
}
return 0;
out_overflow:
print_overflow_msg(__func__, xdr);
return -EIO;
}
static inline int decode_attr_length(struct xdr_stream *xdr, uint32_t *attrlen, __be32 **savep)
{
__be32 *p;
p = xdr_inline_decode(xdr, 4);
if (unlikely(!p))
goto out_overflow;
*attrlen = be32_to_cpup(p);
*savep = xdr->p;
return 0;
out_overflow:
print_overflow_msg(__func__, xdr);
return -EIO;
}
static int decode_attr_supported(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *bitmask)
{
if (likely(bitmap[0] & FATTR4_WORD0_SUPPORTED_ATTRS)) {
int ret;
ret = decode_attr_bitmap(xdr, bitmask);
if (unlikely(ret < 0))
return ret;
bitmap[0] &= ~FATTR4_WORD0_SUPPORTED_ATTRS;
} else
bitmask[0] = bitmask[1] = bitmask[2] = 0;
dprintk("%s: bitmask=%08x:%08x:%08x\n", __func__,
bitmask[0], bitmask[1], bitmask[2]);
return 0;
}
static int decode_attr_type(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *type)
{
__be32 *p;
int ret = 0;
*type = 0;
if (unlikely(bitmap[0] & (FATTR4_WORD0_TYPE - 1U)))
return -EIO;
if (likely(bitmap[0] & FATTR4_WORD0_TYPE)) {
p = xdr_inline_decode(xdr, 4);
if (unlikely(!p))
goto out_overflow;
*type = be32_to_cpup(p);
if (*type < NF4REG || *type > NF4NAMEDATTR) {
dprintk("%s: bad type %d\n", __func__, *type);
return -EIO;
}
bitmap[0] &= ~FATTR4_WORD0_TYPE;
ret = NFS_ATTR_FATTR_TYPE;
}
dprintk("%s: type=0%o\n", __func__, nfs_type2fmt[*type]);
return ret;
out_overflow:
print_overflow_msg(__func__, xdr);
return -EIO;
}
static int decode_attr_fh_expire_type(struct xdr_stream *xdr,
uint32_t *bitmap, uint32_t *type)
{
__be32 *p;
*type = 0;
if (unlikely(bitmap[0] & (FATTR4_WORD0_FH_EXPIRE_TYPE - 1U)))
return -EIO;
if (likely(bitmap[0] & FATTR4_WORD0_FH_EXPIRE_TYPE)) {
p = xdr_inline_decode(xdr, 4);
if (unlikely(!p))
goto out_overflow;
*type = be32_to_cpup(p);
bitmap[0] &= ~FATTR4_WORD0_FH_EXPIRE_TYPE;
}
dprintk("%s: expire type=0x%x\n", __func__, *type);
return 0;
out_overflow:
print_overflow_msg(__func__, xdr);
return -EIO;
}
static int decode_attr_change(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *change)
{
__be32 *p;
int ret = 0;
*change = 0;
if (unlikely(bitmap[0] & (FATTR4_WORD0_CHANGE - 1U)))
return -EIO;
if (likely(bitmap[0] & FATTR4_WORD0_CHANGE)) {
p = xdr_inline_decode(xdr, 8);
if (unlikely(!p))
goto out_overflow;
xdr_decode_hyper(p, change);
bitmap[0] &= ~FATTR4_WORD0_CHANGE;
ret = NFS_ATTR_FATTR_CHANGE;
}
dprintk("%s: change attribute=%Lu\n", __func__,
(unsigned long long)*change);
return ret;
out_overflow:
print_overflow_msg(__func__, xdr);
return -EIO;
}
static int decode_attr_size(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *size)
{
__be32 *p;
int ret = 0;
*size = 0;
if (unlikely(bitmap[0] & (FATTR4_WORD0_SIZE - 1U)))
return -EIO;
if (likely(bitmap[0] & FATTR4_WORD0_SIZE)) {
p = xdr_inline_decode(xdr, 8);
if (unlikely(!p))
goto out_overflow;
xdr_decode_hyper(p, size);
bitmap[0] &= ~FATTR4_WORD0_SIZE;
ret = NFS_ATTR_FATTR_SIZE;
}
dprintk("%s: file size=%Lu\n", __func__, (unsigned long long)*size);
return ret;
out_overflow:
print_overflow_msg(__func__, xdr);
return -EIO;
}
static int decode_attr_link_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
{
__be32 *p;
*res = 0;
if (unlikely(bitmap[0] & (FATTR4_WORD0_LINK_SUPPORT - 1U)))
return -EIO;
if (likely(bitmap[0] & FATTR4_WORD0_LINK_SUPPORT)) {
p = xdr_inline_decode(xdr, 4);
if (unlikely(!p))
goto out_overflow;
*res = be32_to_cpup(p);
bitmap[0] &= ~FATTR4_WORD0_LINK_SUPPORT;
}
dprintk("%s: link support=%s\n", __func__, *res == 0 ? "false" : "true");
return 0;
out_overflow:
print_overflow_msg(__func__, xdr);
return -EIO;
}
static int decode_attr_symlink_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
{
__be32 *p;
*res = 0;
if (unlikely(bitmap[0] & (FATTR4_WORD0_SYMLINK_SUPPORT - 1U)))
return -EIO;
if (likely(bitmap[0] & FATTR4_WORD0_SYMLINK_SUPPORT)) {
p = xdr_inline_decode(xdr, 4);
if (unlikely(!p))
goto out_overflow;
*res = be32_to_cpup(p);
bitmap[0] &= ~FATTR4_WORD0_SYMLINK_SUPPORT;
}
dprintk("%s: symlink support=%s\n", __func__, *res == 0 ? "false" : "true");
return 0;
out_overflow:
print_overflow_msg(__func__, xdr);
return -EIO;
}
static int decode_attr_fsid(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_fsid *fsid)
{
__be32 *p;
int ret = 0;
fsid->major = 0;
fsid->minor = 0;
if (unlikely(bitmap[0] & (FATTR4_WORD0_FSID - 1U)))
return -EIO;
if (likely(bitmap[0] & FATTR4_WORD0_FSID)) {
p = xdr_inline_decode(xdr, 16);
if (unlikely(!p))
goto out_overflow;
p = xdr_decode_hyper(p, &fsid->major);
xdr_decode_hyper(p, &fsid->minor);
bitmap[0] &= ~FATTR4_WORD0_FSID;
ret = NFS_ATTR_FATTR_FSID;
}
dprintk("%s: fsid=(0x%Lx/0x%Lx)\n", __func__,
(unsigned long long)fsid->major,
(unsigned long long)fsid->minor);
return ret;
out_overflow:
print_overflow_msg(__func__, xdr);
return -EIO;
}
static int decode_attr_lease_time(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
{
__be32 *p;
*res = 60;
if (unlikely(bitmap[0] & (FATTR4_WORD0_LEASE_TIME - 1U)))
return -EIO;
if (likely(bitmap[0] & FATTR4_WORD0_LEASE_TIME)) {
p = xdr_inline_decode(xdr, 4);
if (unlikely(!p))
goto out_overflow;
*res = be32_to_cpup(p);
bitmap[0] &= ~FATTR4_WORD0_LEASE_TIME;
}
dprintk("%s: file size=%u\n", __func__, (unsigned int)*res);
return 0;
out_overflow:
print_overflow_msg(__func__, xdr);
return -EIO;
}
static int decode_attr_error(struct xdr_stream *xdr, uint32_t *bitmap, int32_t *res)
{
__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;
*res = -be32_to_cpup(p);
}
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;
if (fh != NULL)
memset(fh, 0, sizeof(*fh));
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;
if (fh != NULL) {
memcpy(fh->data, p, len);
fh->size = len;
}
bitmap[0] &= ~FATTR4_WORD0_FILEHANDLE;
}
return 0;
out_overflow:
print_overflow_msg(__func__, xdr);
return -EIO;
}
static int decode_attr_aclsupport(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
{
__be32 *p;
*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)) {
p = xdr_inline_decode(xdr, 4);
if (unlikely(!p))
goto out_overflow;
*res = be32_to_cpup(p);
bitmap[0] &= ~FATTR4_WORD0_ACLSUPPORT;
}
dprintk("%s: ACLs supported=%u\n", __func__, (unsigned int)*res);
return 0;
out_overflow:
print_overflow_msg(__func__, xdr);
return -EIO;
}
static int decode_attr_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
{
__be32 *p;
int ret = 0;
*fileid = 0;
if (unlikely(bitmap[0] & (FATTR4_WORD0_FILEID - 1U)))
return -EIO;
if (likely(bitmap[0] & FATTR4_WORD0_FILEID)) {
p = xdr_inline_decode(xdr, 8);
if (unlikely(!p))
goto out_overflow;
xdr_decode_hyper(p, fileid);
bitmap[0] &= ~FATTR4_WORD0_FILEID;
ret = NFS_ATTR_FATTR_FILEID;
}
dprintk("%s: fileid=%Lu\n", __func__, (unsigned long long)*fileid);
return ret;
out_overflow:
print_overflow_msg(__func__, xdr);
return -EIO;
}
static int decode_attr_mounted_on_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
{
__be32 *p;
int ret = 0;
*fileid = 0;
if (unlikely(bitmap[1] & (FATTR4_WORD1_MOUNTED_ON_FILEID - 1U)))
return -EIO;
if (likely(bitmap[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)) {
p = xdr_inline_decode(xdr, 8);
if (unlikely(!p))
goto out_overflow;
xdr_decode_hyper(p, fileid);
bitmap[1] &= ~FATTR4_WORD1_MOUNTED_ON_FILEID;
ret = NFS_ATTR_FATTR_MOUNTED_ON_FILEID;
}
dprintk("%s: fileid=%Lu\n", __func__, (unsigned long long)*fileid);
return ret;
out_overflow:
print_overflow_msg(__func__, xdr);
return -EIO;
}
static int decode_attr_files_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
{
__be32 *p;
int status = 0;
*res = 0;
if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_AVAIL - 1U)))
return -EIO;
if (likely(bitmap[0] & FATTR4_WORD0_FILES_AVAIL)) {
p = xdr_inline_decode(xdr, 8);
if (unlikely(!p))
goto out_overflow;
xdr_decode_hyper(p, res);
bitmap[0] &= ~FATTR4_WORD0_FILES_AVAIL;
}
dprintk("%s: files avail=%Lu\n", __func__, (unsigned long long)*res);
return status;
out_overflow:
print_overflow_msg(__func__, xdr);
return -EIO;
}
static int decode_attr_files_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
{
__be32 *p;
int status = 0;
*res = 0;
if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_FREE - 1U)))
return -EIO;
if (likely(bitmap[0] & FATTR4_WORD0_FILES_FREE)) {
p = xdr_inline_decode(xdr, 8);
if (unlikely(!p))
goto out_overflow;
xdr_decode_hyper(p, res);
bitmap[0] &= ~FATTR4_WORD0_FILES_FREE;
}
dprintk("%s: files free=%Lu\n", __func__, (unsigned long long)*res);
return status;
out_overflow:
print_overflow_msg(__func__, xdr);
return -EIO;
}
static int decode_attr_files_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
{
__be32 *p;
int status = 0;
*res = 0;
if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_TOTAL - 1U)))
return -EIO;
if (likely(bitmap[0] & FATTR4_WORD0_FILES_TOTAL)) {
p = xdr_inline_decode(xdr, 8);
if (unlikely(!p))
goto out_overflow;
xdr_decode_hyper(p, res);
bitmap[0] &= ~FATTR4_WORD0_FILES_TOTAL;
}
dprintk("%s: files total=%Lu\n", __func__, (unsigned long long)*res);
return status;
out_overflow:
print_overflow_msg(__func__, xdr);
return -EIO;
}
static int decode_pathname(struct xdr_stream *xdr, struct nfs4_pathname *path)
{
u32 n;
__be32 *p;
int status = 0;
p = xdr_inline_decode(xdr, 4);
if (unlikely(!p))
goto out_overflow;
n = be32_to_cpup(p);
if (n == 0)
goto root_path;
dprintk("pathname4: ");
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;
ifdebug (XDR)
pr_cont("%s%.*s ",
(path->ncomponents != n ? "/ " : ""),
component->len, component->data);
if (path->ncomponents < NFS4_PATHNAME_MAXCOMPONENTS)
path->ncomponents++;
else {
dprintk("cannot parse %d components in path\n", n);
goto out_eio;
}
}
out:
return status;
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("pathname4: /\n");
goto out;
out_eio:
dprintk(" status %d", status);
status = -EIO;
goto out;
out_overflow:
print_overflow_msg(__func__, xdr);
return -EIO;
}
static int decode_attr_fs_locations(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs4_fs_locations *res)
{
int n;
__be32 *p;
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;
status = -EIO;
/* Ignore borken servers that return unrequested attrs */
if (unlikely(res == NULL))
goto out;
dprintk("%s: fsroot:\n", __func__);
status = decode_pathname(xdr, &res->fs_path);
if (unlikely(status != 0))
goto out;
p = xdr_inline_decode(xdr, 4);
if (unlikely(!p))
goto out_overflow;
n = be32_to_cpup(p);
if (n <= 0)
goto out_eio;
res->nlocations = 0;
while (res->nlocations < n) {
u32 m;
struct nfs4_fs_location *loc = &res->locations[res->nlocations];
p = xdr_inline_decode(xdr, 4);
if (unlikely(!p))
goto out_overflow;
m = be32_to_cpup(p);
loc->nservers = 0;
dprintk("%s: servers:\n", __func__);
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 {
unsigned int i;
dprintk("%s: using first %u of %u servers "
"returned for location %u\n",
__func__,
NFS4_FS_LOCATION_MAXSERVERS,
m, res->nlocations);
for (i = loc->nservers; i < m; i++) {
unsigned int len;
char *data;
status = decode_opaque_inline(xdr, &len, &data);
if (unlikely(status != 0))
goto out_eio;
}
}
}
status = decode_pathname(xdr, &loc->rootpath);
if (unlikely(status != 0))
goto out_eio;
if (res->nlocations < NFS4_FS_LOCATIONS_MAXENTRIES)
res->nlocations++;
}
if (res->nlocations != 0)
status = NFS_ATTR_FATTR_V4_LOCATIONS;
out:
dprintk("%s: fs_locations done, error = %d\n", __func__, status);
return status;
out_overflow:
print_overflow_msg(__func__, xdr);
out_eio:
status = -EIO;
goto out;
}
static int decode_attr_maxfilesize(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
{
__be32 *p;
int status = 0;
*res = 0;
if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXFILESIZE - 1U)))
return -EIO;
if (likely(bitmap[0] & FATTR4_WORD0_MAXFILESIZE)) {
p = xdr_inline_decode(xdr, 8);
if (unlikely(!p))
goto out_overflow;
xdr_decode_hyper(p, res);
bitmap[0] &= ~FATTR4_WORD0_MAXFILESIZE;
}
dprintk("%s: maxfilesize=%Lu\n", __func__, (unsigned long long)*res);
return status;
out_overflow:
print_overflow_msg(__func__, xdr);
return -EIO;
}
static int decode_attr_maxlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxlink)
{
__be32 *p;
int status = 0;
*maxlink = 1;
if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXLINK - 1U)))
return -EIO;
if (likely(bitmap[0] & FATTR4_WORD0_MAXLINK)) {
p = xdr_inline_decode(xdr, 4);
if (unlikely(!p))
goto out_overflow;
*maxlink = be32_to_cpup(p);
bitmap[0] &= ~FATTR4_WORD0_MAXLINK;
}
dprintk("%s: maxlink=%u\n", __func__, *maxlink);
return status;
out_overflow:
print_overflow_msg(__func__, xdr);
return -EIO;
}
static int decode_attr_maxname(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxname)
{
__be32 *p;
int status = 0;
*maxname = 1024;
if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXNAME - 1U)))
return -EIO;
if (likely(bitmap[0] & FATTR4_WORD0_MAXNAME)) {
p = xdr_inline_decode(xdr, 4);
if (unlikely(!p))
goto out_overflow;
*maxname = be32_to_cpup(p);
bitmap[0] &= ~FATTR4_WORD0_MAXNAME;
}
dprintk("%s: maxname=%u\n", __func__, *maxname);
return status;
out_overflow:
print_overflow_msg(__func__, xdr);
return -EIO;
}
static int decode_attr_maxread(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
{
__be32 *p;
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;
p = xdr_inline_decode(xdr, 8);
if (unlikely(!p))
goto out_overflow;
xdr_decode_hyper(p, &maxread);
if (maxread > 0x7FFFFFFF)
maxread = 0x7FFFFFFF;
*res = (uint32_t)maxread;
bitmap[0] &= ~FATTR4_WORD0_MAXREAD;
}
dprintk("%s: maxread=%lu\n", __func__, (unsigned long)*res);
return status;
out_overflow:
print_overflow_msg(__func__, xdr);
return -EIO;
}
static int decode_attr_maxwrite(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
{
__be32 *p;
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;
p = xdr_inline_decode(xdr, 8);
if (unlikely(!p))
goto out_overflow;
xdr_decode_hyper(p, &maxwrite);
if (maxwrite > 0x7FFFFFFF)
maxwrite = 0x7FFFFFFF;
*res = (uint32_t)maxwrite;
bitmap[0] &= ~FATTR4_WORD0_MAXWRITE;
}
dprintk("%s: maxwrite=%lu\n", __func__, (unsigned long)*res);
return status;
out_overflow:
print_overflow_msg(__func__, xdr);
return -EIO;
}
static int decode_attr_mode(struct xdr_stream *xdr, uint32_t *bitmap, umode_t *mode)
{
uint32_t tmp;
__be32 *p;
int ret = 0;
*mode = 0;
if (unlikely(bitmap[1] & (FATTR4_WORD1_MODE - 1U)))
return -EIO;
if (likely(bitmap[1] & FATTR4_WORD1_MODE)) {
p = xdr_inline_decode(xdr, 4);
if (unlikely(!p))
goto out_overflow;
tmp = be32_to_cpup(p);
*mode = tmp & ~S_IFMT;
bitmap[1] &= ~FATTR4_WORD1_MODE;
ret = NFS_ATTR_FATTR_MODE;
}
dprintk("%s: file mode=0%o\n", __func__, (unsigned int)*mode);
return ret;
out_overflow:
print_overflow_msg(__func__, xdr);
return -EIO;
}
static int decode_attr_nlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *nlink)
{
__be32 *p;
int ret = 0;
*nlink = 1;
if (unlikely(bitmap[1] & (FATTR4_WORD1_NUMLINKS - 1U)))
return -EIO;
if (likely(bitmap[1] & FATTR4_WORD1_NUMLINKS)) {
p = xdr_inline_decode(xdr, 4);
if (unlikely(!p))
goto out_overflow;
*nlink = be32_to_cpup(p);
bitmap[1] &= ~FATTR4_WORD1_NUMLINKS;
ret = NFS_ATTR_FATTR_NLINK;
}
dprintk("%s: nlink=%u\n", __func__, (unsigned int)*nlink);
return ret;
out_overflow:
print_overflow_msg(__func__, xdr);
return -EIO;
}
static int decode_attr_owner(struct xdr_stream *xdr, uint32_t *bitmap,
const struct nfs_server *server, uint32_t *uid,
struct nfs4_string *owner_name)
{
uint32_t len;
__be32 *p;
int ret = 0;
*uid = -2;
if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER - 1U)))
return -EIO;
if (likely(bitmap[1] & FATTR4_WORD1_OWNER)) {
p = xdr_inline_decode(xdr, 4);
if (unlikely(!p))
goto out_overflow;
len = be32_to_cpup(p);
p = xdr_inline_decode(xdr, len);
if (unlikely(!p))
goto out_overflow;
if (owner_name != NULL) {
owner_name->data = kmemdup(p, len, GFP_NOWAIT);
if (owner_name->data != NULL) {
owner_name->len = len;
ret = NFS_ATTR_FATTR_OWNER_NAME;
}
} else if (len < XDR_MAX_NETOBJ) {
if (nfs_map_name_to_uid(server, (char *)p, len, uid) == 0)
ret = NFS_ATTR_FATTR_OWNER;
else
dprintk("%s: nfs_map_name_to_uid failed!\n",
__func__);
} else
dprintk("%s: name too long (%u)!\n",
__func__, len);
bitmap[1] &= ~FATTR4_WORD1_OWNER;
}
dprintk("%s: uid=%d\n", __func__, (int)*uid);
return ret;
out_overflow:
print_overflow_msg(__func__, xdr);
return -EIO;
}
static int decode_attr_group(struct xdr_stream *xdr, uint32_t *bitmap,
const struct nfs_server *server, uint32_t *gid,
struct nfs4_string *group_name)
{
uint32_t len;
__be32 *p;
int ret = 0;
*gid = -2;
if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER_GROUP - 1U)))
return -EIO;
if (likely(bitmap[1] & FATTR4_WORD1_OWNER_GROUP)) {
p = xdr_inline_decode(xdr, 4);
if (unlikely(!p))
goto out_overflow;
len = be32_to_cpup(p);
p = xdr_inline_decode(xdr, len);
if (unlikely(!p))
goto out_overflow;
if (group_name != NULL) {
group_name->data = kmemdup(p, len, GFP_NOWAIT);
if (group_name->data != NULL) {
group_name->len = len;
ret = NFS_ATTR_FATTR_GROUP_NAME;
}
} else if (len < XDR_MAX_NETOBJ) {
if (nfs_map_group_to_gid(server, (char *)p, len, gid) == 0)
ret = NFS_ATTR_FATTR_GROUP;
else
dprintk("%s: nfs_map_group_to_gid failed!\n",
__func__);
} else
dprintk("%s: name too long (%u)!\n",
__func__, len);
bitmap[1] &= ~FATTR4_WORD1_OWNER_GROUP;
}
dprintk("%s: gid=%d\n", __func__, (int)*gid);
return ret;
out_overflow:
print_overflow_msg(__func__, xdr);
return -EIO;
}
static int decode_attr_rdev(struct xdr_stream *xdr, uint32_t *bitmap, dev_t *rdev)
{
uint32_t major = 0, minor = 0;
__be32 *p;
int ret = 0;
*rdev = MKDEV(0,0);
if (unlikely(bitmap[1] & (FATTR4_WORD1_RAWDEV - 1U)))
return -EIO;
if (likely(bitmap[1] & FATTR4_WORD1_RAWDEV)) {
dev_t tmp;
p = xdr_inline_decode(xdr, 8);
if (unlikely(!p))
goto out_overflow;
major = be32_to_cpup(p++);
minor = be32_to_cpup(p);
tmp = MKDEV(major, minor);
if (MAJOR(tmp) == major && MINOR(tmp) == minor)
*rdev = tmp;
bitmap[1] &= ~ FATTR4_WORD1_RAWDEV;
ret = NFS_ATTR_FATTR_RDEV;
}
dprintk("%s: rdev=(0x%x:0x%x)\n", __func__, major, minor);
return ret;
out_overflow:
print_overflow_msg(__func__, xdr);
return -EIO;
}
static int decode_attr_space_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
{
__be32 *p;
int status = 0;
*res = 0;
if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_AVAIL - 1U)))
return -EIO;
if (likely(bitmap[1] & FATTR4_WORD1_SPACE_AVAIL)) {
p = xdr_inline_decode(xdr, 8);
if (unlikely(!p))
goto out_overflow;
xdr_decode_hyper(p, res);
bitmap[1] &= ~FATTR4_WORD1_SPACE_AVAIL;
}
dprintk("%s: space avail=%Lu\n", __func__, (unsigned long long)*res);
return status;
out_overflow:
print_overflow_msg(__func__, xdr);
return -EIO;
}
static int decode_attr_space_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
{
__be32 *p;
int status = 0;
*res = 0;
if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_FREE - 1U)))
return -EIO;
if (likely(bitmap[1] & FATTR4_WORD1_SPACE_FREE)) {
p = xdr_inline_decode(xdr, 8);
if (unlikely(!p))
goto out_overflow;
xdr_decode_hyper(p, res);
bitmap[1] &= ~FATTR4_WORD1_SPACE_FREE;
}
dprintk("%s: space free=%Lu\n", __func__, (unsigned long long)*res);
return status;
out_overflow:
print_overflow_msg(__func__, xdr);
return -EIO;
}
static int decode_attr_space_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
{
__be32 *p;
int status = 0;
*res = 0;
if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_TOTAL - 1U)))
return -EIO;
if (likely(bitmap[1] & FATTR4_WORD1_SPACE_TOTAL)) {
p = xdr_inline_decode(xdr, 8);
if (unlikely(!p))
goto out_overflow;
xdr_decode_hyper(p, res);
bitmap[1] &= ~FATTR4_WORD1_SPACE_TOTAL;
}
dprintk("%s: space total=%Lu\n", __func__, (unsigned long long)*res);
return status;
out_overflow:
print_overflow_msg(__func__, xdr);
return -EIO;
}
static int decode_attr_space_used(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *used)
{
__be32 *p;
int ret = 0;
*used = 0;
if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_USED - 1U)))
return -EIO;
if (likely(bitmap[1] & FATTR4_WORD1_SPACE_USED)) {
p = xdr_inline_decode(xdr, 8);
if (unlikely(!p))
goto out_overflow;
xdr_decode_hyper(p, used);
bitmap[1] &= ~FATTR4_WORD1_SPACE_USED;
ret = NFS_ATTR_FATTR_SPACE_USED;
}
dprintk("%s: space used=%Lu\n", __func__,
(unsigned long long)*used);
return ret;
out_overflow:
print_overflow_msg(__func__, xdr);
return -EIO;
}
static int decode_attr_time(struct xdr_stream *xdr, struct timespec *time)
{
__be32 *p;
uint64_t sec;
uint32_t nsec;
p = xdr_inline_decode(xdr, 12);
if (unlikely(!p))
goto out_overflow;
p = xdr_decode_hyper(p, &sec);
nsec = be32_to_cpup(p);
time->tv_sec = (time_t)sec;
time->tv_nsec = (long)nsec;
return 0;
out_overflow:
print_overflow_msg(__func__, xdr);
return -EIO;
}
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);
if (status == 0)
status = NFS_ATTR_FATTR_ATIME;
bitmap[1] &= ~FATTR4_WORD1_TIME_ACCESS;
}
dprintk("%s: atime=%ld\n", __func__, (long)time->tv_sec);
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);
if (status == 0)
status = NFS_ATTR_FATTR_CTIME;
bitmap[1] &= ~FATTR4_WORD1_TIME_METADATA;
}
dprintk("%s: ctime=%ld\n", __func__, (long)time->tv_sec);
return status;
}
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;
}
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);
if (status == 0)
status = NFS_ATTR_FATTR_MTIME;
bitmap[1] &= ~FATTR4_WORD1_TIME_MODIFY;
}
dprintk("%s: mtime=%ld\n", __func__, (long)time->tv_sec);
return status;
}
static int verify_attr_len(struct xdr_stream *xdr, __be32 *savep, uint32_t attrlen)
{
unsigned int attrwords = XDR_QUADLEN(attrlen);
unsigned int nwords = xdr->p - savep;
if (unlikely(attrwords != nwords)) {
dprintk("%s: server returned incorrect attribute length: "
"%u %c %u\n",
__func__,
attrwords << 2,
(attrwords < nwords) ? '<' : '>',
nwords << 2);
return -EIO;
}
return 0;
}
static int decode_change_info(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
{
__be32 *p;
p = xdr_inline_decode(xdr, 20);
if (unlikely(!p))
goto out_overflow;
cinfo->atomic = be32_to_cpup(p++);
p = xdr_decode_hyper(p, &cinfo->before);
xdr_decode_hyper(p, &cinfo->after);
return 0;
out_overflow:
print_overflow_msg(__func__, xdr);
return -EIO;
}
static int decode_access(struct xdr_stream *xdr, struct nfs4_accessres *access)
{
__be32 *p;
uint32_t supp, acc;
int status;
status = decode_op_hdr(xdr, OP_ACCESS);
if (status)
return status;
p = xdr_inline_decode(xdr, 8);
if (unlikely(!p))
goto out_overflow;
supp = be32_to_cpup(p++);
acc = be32_to_cpup(p);
access->supported = supp;
access->access = acc;
return 0;
out_overflow:
print_overflow_msg(__func__, xdr);
return -EIO;
}
static int decode_opaque_fixed(struct xdr_stream *xdr, void *buf, size_t len)
{
__be32 *p;
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, NFS4_STATEID_SIZE);
}
static int decode_close(struct xdr_stream *xdr, struct nfs_closeres *res)
{
int status;
status = decode_op_hdr(xdr, OP_CLOSE);
if (status != -EIO)
nfs_increment_open_seqid(status, res->seqid);
if (!status)
status = decode_stateid(xdr, &res->stateid);
return status;
}
static int decode_verifier(struct xdr_stream *xdr, void *verifier)
{
return decode_opaque_fixed(xdr, verifier, NFS4_VERIFIER_SIZE);
}
static int decode_commit(struct xdr_stream *xdr, struct nfs_writeres *res)
{
int status;
status = decode_op_hdr(xdr, OP_COMMIT);
if (!status)
status = decode_verifier(xdr, res->verf->verifier);
return status;
}
static int decode_create(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
{
__be32 *p;
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;
p = xdr_inline_decode(xdr, 4);
if (unlikely(!p))
goto out_overflow;
bmlen = be32_to_cpup(p);
p = xdr_inline_decode(xdr, bmlen << 2);
if (likely(p))
return 0;
out_overflow:
print_overflow_msg(__func__, xdr);
return -EIO;
}
static int decode_server_caps(struct xdr_stream *xdr, struct nfs4_server_caps_res *res)
{
__be32 *savep;
uint32_t attrlen, bitmap[3] = {0};
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_fh_expire_type(xdr, bitmap,
&res->fh_expire_type)) != 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:
dprintk("%s: xdr returned %d!\n", __func__, -status);
return status;
}
static int decode_statfs(struct xdr_stream *xdr, struct nfs_fsstat *fsstat)
{
__be32 *savep;
uint32_t attrlen, bitmap[3] = {0};
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_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:
dprintk("%s: xdr returned %d!\n", __func__, -status);
return status;
}
static int decode_pathconf(struct xdr_stream *xdr, struct nfs_pathconf *pathconf)
{
__be32 *savep;
uint32_t attrlen, bitmap[3] = {0};
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_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:
dprintk("%s: xdr returned %d!\n", __func__, -status);
return status;
}
static int decode_getfattr_attrs(struct xdr_stream *xdr, uint32_t *bitmap,
struct nfs_fattr *fattr, struct nfs_fh *fh,
struct nfs4_fs_locations *fs_loc,
const struct nfs_server *server)
{
int status;
umode_t fmode = 0;
uint32_t type;
int32_t err;
status = decode_attr_type(xdr, bitmap, &type);
if (status < 0)
goto xdr_error;
fattr->mode = 0;
if (status != 0) {
fattr->mode |= nfs_type2fmt[type];
fattr->valid |= status;
}
status = decode_attr_change(xdr, bitmap, &fattr->change_attr);
if (status < 0)
goto xdr_error;
fattr->valid |= status;
status = decode_attr_size(xdr, bitmap, &fattr->size);
if (status < 0)
goto xdr_error;
fattr->valid |= status;
status = decode_attr_fsid(xdr, bitmap, &fattr->fsid);
if (status < 0)
goto xdr_error;
fattr->valid |= status;
err = 0;
status = decode_attr_error(xdr, bitmap, &err);
if (status < 0)
goto xdr_error;
status = decode_attr_filehandle(xdr, bitmap, fh);
if (status < 0)
goto xdr_error;
status = decode_attr_fileid(xdr, bitmap, &fattr->fileid);
if (status < 0)
goto xdr_error;
fattr->valid |= status;
status = decode_attr_fs_locations(xdr, bitmap, fs_loc);
if (status < 0)
goto xdr_error;
fattr->valid |= status;
status = decode_attr_mode(xdr, bitmap, &fmode);
if (status < 0)
goto xdr_error;
if (status != 0) {
fattr->mode |= fmode;
fattr->valid |= status;
}
status = decode_attr_nlink(xdr, bitmap, &fattr->nlink);
if (status < 0)
goto xdr_error;
fattr->valid |= status;
status = decode_attr_owner(xdr, bitmap, server, &fattr->uid, fattr->owner_name);
if (status < 0)
goto xdr_error;
fattr->valid |= status;
status = decode_attr_group(xdr, bitmap, server, &fattr->gid, fattr->group_name);
if (status < 0)
goto xdr_error;
fattr->valid |= status;
status = decode_attr_rdev(xdr, bitmap, &fattr->rdev);
if (status < 0)
goto xdr_error;
fattr->valid |= status;
status = decode_attr_space_used(xdr, bitmap, &fattr->du.nfs3.used);
if (status < 0)
goto xdr_error;
fattr->valid |= status;
status = decode_attr_time_access(xdr, bitmap, &fattr->atime);
if (status < 0)
goto xdr_error;
fattr->valid |= status;
status = decode_attr_time_metadata(xdr, bitmap, &fattr->ctime);
if (status < 0)
goto xdr_error;
fattr->valid |= status;
status = decode_attr_time_modify(xdr, bitmap, &fattr->mtime);
if (status < 0)
goto xdr_error;
fattr->valid |= status;
status = decode_attr_mounted_on_fileid(xdr, bitmap, &fattr->mounted_on_fileid);
if (status < 0)
goto xdr_error;
fattr->valid |= status;
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, struct nfs4_fs_locations *fs_loc,
const struct nfs_server *server)
{
__be32 *savep;
uint32_t attrlen,
bitmap[3] = {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, fs_loc, server);
if (status < 0)
goto xdr_error;
status = verify_attr_len(xdr, savep, attrlen);
xdr_error:
dprintk("%s: xdr returned %d\n", __func__, -status);
return status;
}
static int decode_getfattr(struct xdr_stream *xdr, struct nfs_fattr *fattr,
const struct nfs_server *server)
{
return decode_getfattr_generic(xdr, fattr, NULL, NULL, server);
}
/*
* 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 "NFS: %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;
}
/*
* The prefered block size for layout directed io
*/
static int decode_attr_layout_blksize(struct xdr_stream *xdr, uint32_t *bitmap,
uint32_t *res)
{
__be32 *p;
dprintk("%s: bitmap is %x\n", __func__, bitmap[2]);
*res = 0;
if (bitmap[2] & FATTR4_WORD2_LAYOUT_BLKSIZE) {
p = xdr_inline_decode(xdr, 4);
if (unlikely(!p)) {
print_overflow_msg(__func__, xdr);
return -EIO;
}
*res = be32_to_cpup(p);
bitmap[2] &= ~FATTR4_WORD2_LAYOUT_BLKSIZE;
}
return 0;
}
static int decode_fsinfo(struct xdr_stream *xdr, struct nfs_fsinfo *fsinfo)
{
__be32 *savep;
uint32_t attrlen, bitmap[3];
int status;
if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
goto xdr_error;
if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
goto xdr_error;
if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
goto xdr_error;
fsinfo->rtmult = fsinfo->wtmult = 512; /* ??? */
if ((status = decode_attr_lease_time(xdr, bitmap, &fsinfo->lease_time)) != 0)
goto xdr_error;
if ((status = decode_attr_maxfilesize(xdr, bitmap, &fsinfo->maxfilesize)) != 0)
goto xdr_error;
if ((status = decode_attr_maxread(xdr, bitmap, &fsinfo->rtmax)) != 0)
goto xdr_error;
fsinfo->rtpref = fsinfo->dtpref = fsinfo->rtmax;
if ((status = decode_attr_maxwrite(xdr, bitmap, &fsinfo->wtmax)) != 0)
goto xdr_error;
fsinfo->wtpref = fsinfo->wtmax;
status = decode_attr_time_delta(xdr, bitmap, &fsinfo->time_delta);
if (status != 0)
goto xdr_error;
status = decode_attr_pnfstype(xdr, bitmap, &fsinfo->layouttype);
if (status != 0)
goto xdr_error;
status = decode_attr_layout_blksize(xdr, bitmap, &fsinfo->blksize);
if (status)
goto xdr_error;
status = verify_attr_len(xdr, savep, attrlen);
xdr_error:
dprintk("%s: xdr returned %d!\n", __func__, -status);
return status;
}
static int decode_getfh(struct xdr_stream *xdr, struct nfs_fh *fh)
{
__be32 *p;
uint32_t len;
int status;
/* Zero handle first to allow comparisons */
memset(fh, 0, sizeof(*fh));
status = decode_op_hdr(xdr, OP_GETFH);
if (status)
return status;
p = xdr_inline_decode(xdr, 4);
if (unlikely(!p))
goto out_overflow;
len = be32_to_cpup(p);
if (len > NFS4_FHSIZE)
return -EIO;
fh->size = len;
p = xdr_inline_decode(xdr, len);
if (unlikely(!p))
goto out_overflow;
memcpy(fh->data, p, len);
return 0;
out_overflow:
print_overflow_msg(__func__, xdr);
return -EIO;
}
static int decode_link(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
{
int status;
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.
*/
static int decode_lock_denied (struct xdr_stream *xdr, struct file_lock *fl)
{
uint64_t offset, length, clientid;
__be32 *p;
uint32_t namelen, type;
p = xdr_inline_decode(xdr, 32); /* read 32 bytes */
if (unlikely(!p))
goto out_overflow;
p = xdr_decode_hyper(p, &offset); /* read 2 8-byte long words */
p = xdr_decode_hyper(p, &length);
type = be32_to_cpup(p++); /* 4 byte read */
if (fl != NULL) { /* manipulate file lock */
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;
}
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 */
if (likely(p))
return -NFS4ERR_DENIED;
out_overflow:
print_overflow_msg(__func__, xdr);
return -EIO;
}
static int decode_lock(struct xdr_stream *xdr, struct nfs_lock_res *res)
{
int status;
status = decode_op_hdr(xdr, OP_LOCK);
if (status == -EIO)
goto out;
if (status == 0) {
status = decode_stateid(xdr, &res->stateid);
if (unlikely(status))
goto out;
} else if (status == -NFS4ERR_DENIED)
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:
return status;
}
static int decode_lockt(struct xdr_stream *xdr, struct nfs_lockt_res *res)
{
int status;
status = decode_op_hdr(xdr, OP_LOCKT);
if (status == -NFS4ERR_DENIED)
return decode_lock_denied(xdr, res->denied);
return status;
}
static int decode_locku(struct xdr_stream *xdr, struct nfs_locku_res *res)
{
int status;
status = decode_op_hdr(xdr, OP_LOCKU);
if (status != -EIO)
nfs_increment_lock_seqid(status, res->seqid);
if (status == 0)
status = decode_stateid(xdr, &res->stateid);
return status;
}
static int decode_release_lockowner(struct xdr_stream *xdr)
{
return decode_op_hdr(xdr, OP_RELEASE_LOCKOWNER);
}
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)
{
__be32 *p;
uint32_t limit_type, nblocks, blocksize;
p = xdr_inline_decode(xdr, 12);
if (unlikely(!p))
goto out_overflow;
limit_type = be32_to_cpup(p++);
switch (limit_type) {
case 1:
xdr_decode_hyper(p, maxsize);
break;
case 2:
nblocks = be32_to_cpup(p++);
blocksize = be32_to_cpup(p);
*maxsize = (uint64_t)nblocks * (uint64_t)blocksize;
}
return 0;
out_overflow:
print_overflow_msg(__func__, xdr);
return -EIO;
}
static int decode_delegation(struct xdr_stream *xdr, struct nfs_openres *res)
{
__be32 *p;
uint32_t delegation_type;
int status;
p = xdr_inline_decode(xdr, 4);
if (unlikely(!p))
goto out_overflow;
delegation_type = be32_to_cpup(p);
if (delegation_type == NFS4_OPEN_DELEGATE_NONE) {
res->delegation_type = 0;
return 0;
}
status = decode_stateid(xdr, &res->delegation);
if (unlikely(status))
return status;
p = xdr_inline_decode(xdr, 4);
if (unlikely(!p))
goto out_overflow;
res->do_recall = be32_to_cpup(p);
switch (delegation_type) {
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)
return -EIO;
}
return decode_ace(xdr, NULL, res->server->nfs_client);
out_overflow:
print_overflow_msg(__func__, xdr);
return -EIO;
}
static int decode_open(struct xdr_stream *xdr, struct nfs_openres *res)
{
__be32 *p;
uint32_t savewords, bmlen, i;
int status;
status = decode_op_hdr(xdr, OP_OPEN);
if (status != -EIO)
nfs_increment_open_seqid(status, res->seqid);
if (!status)
status = decode_stateid(xdr, &res->stateid);
if (unlikely(status))
return status;
decode_change_info(xdr, &res->cinfo);
p = xdr_inline_decode(xdr, 8);
if (unlikely(!p))
goto out_overflow;
res->rflags = be32_to_cpup(p++);
bmlen = be32_to_cpup(p);
if (bmlen > 10)
goto xdr_error;
p = xdr_inline_decode(xdr, bmlen << 2);
if (unlikely(!p))
goto out_overflow;
savewords = min_t(uint32_t, bmlen, NFS4_BITMAP_SIZE);
for (i = 0; i < savewords; ++i)
res->attrset[i] = be32_to_cpup(p++);
for (; i < NFS4_BITMAP_SIZE; i++)
res->attrset[i] = 0;
return decode_delegation(xdr, res);
xdr_error:
dprintk("%s: Bitmap too large! Length = %u\n", __func__, bmlen);
return -EIO;
out_overflow:
print_overflow_msg(__func__, xdr);
return -EIO;
}
static int decode_open_confirm(struct xdr_stream *xdr, struct nfs_open_confirmres *res)
{
int status;
status = decode_op_hdr(xdr, OP_OPEN_CONFIRM);
if (status != -EIO)
nfs_increment_open_seqid(status, res->seqid);
if (!status)
status = decode_stateid(xdr, &res->stateid);
return status;
}
static int decode_open_downgrade(struct xdr_stream *xdr, struct nfs_closeres *res)
{
int status;
status = decode_op_hdr(xdr, OP_OPEN_DOWNGRADE);
if (status != -EIO)
nfs_increment_open_seqid(status, res->seqid);
if (!status)
status = decode_stateid(xdr, &res->stateid);
return status;
}
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;
__be32 *p;
uint32_t count, eof, recvd, hdrlen;
int status;
status = decode_op_hdr(xdr, OP_READ);
if (status)
return status;
p = xdr_inline_decode(xdr, 8);
if (unlikely(!p))
goto out_overflow;
eof = be32_to_cpup(p++);
count = be32_to_cpup(p);
hdrlen = (u8 *) xdr->p - (u8 *) iov->iov_base;
recvd = req->rq_rcv_buf.len - hdrlen;
if (count > recvd) {
dprintk("NFS: server cheating in read reply: "
"count %u > recvd %u\n", count, recvd);
count = recvd;
eof = 0;
}
xdr_read_pages(xdr, count);
res->eof = eof;
res->count = count;
return 0;
out_overflow:
print_overflow_msg(__func__, xdr);
return -EIO;
}
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;
size_t hdrlen;
u32 recvd, pglen = rcvbuf->page_len;
int status;
__be32 verf[2];
status = decode_op_hdr(xdr, OP_READDIR);
if (!status)
status = decode_verifier(xdr, readdir->verifier.data);
if (unlikely(status))
return status;
memcpy(verf, readdir->verifier.data, sizeof(verf));
dprintk("%s: verifier = %08x:%08x\n",
__func__, verf[0], verf[1]);
hdrlen = (char *) xdr->p - (char *) iov->iov_base;
recvd = rcvbuf->len - hdrlen;
if (pglen > recvd)
pglen = recvd;
xdr_read_pages(xdr, pglen);
return pglen;
}
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;
size_t hdrlen;
u32 len, recvd;
__be32 *p;
int status;
status = decode_op_hdr(xdr, OP_READLINK);
if (status)
return status;
/* Convert length of symlink */
p = xdr_inline_decode(xdr, 4);
if (unlikely(!p))
goto out_overflow;
len = be32_to_cpup(p);
if (len >= rcvbuf->page_len || len <= 0) {
dprintk("nfs: server returned giant symlink!\n");
return -ENAMETOOLONG;
}
hdrlen = (char *) xdr->p - (char *) iov->iov_base;
recvd = req->rq_rcv_buf.len - hdrlen;
if (recvd < len) {
dprintk("NFS: server cheating in readlink reply: "
"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).
*/
xdr_terminate_string(rcvbuf, len);
return 0;
out_overflow:
print_overflow_msg(__func__, xdr);
return -EIO;
}
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);
}
static int
decode_restorefh(struct xdr_stream *xdr)
{
return decode_op_hdr(xdr, OP_RESTOREFH);
}
static int decode_getacl(struct xdr_stream *xdr, struct rpc_rqst *req,
struct nfs_getaclres *res)
{
__be32 *savep, *bm_p;
uint32_t attrlen,
bitmap[3] = {0};
struct kvec *iov = req->rq_rcv_buf.head;
int status;
size_t page_len = xdr->buf->page_len;
res->acl_len = 0;
if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
goto out;
bm_p = xdr->p;
res->acl_data_offset = be32_to_cpup(bm_p) + 2;
res->acl_data_offset <<= 2;
/* Check if the acl data starts beyond the allocated buffer */
if (res->acl_data_offset > page_len)
return -ERANGE;
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)) {
size_t hdrlen;
/* The bitmap (xdr len + bitmaps) and the attr xdr len words
* are stored with the acl data to handle the problem of
* variable length bitmaps.*/
xdr->p = bm_p;
/* 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;
attrlen += res->acl_data_offset;
if (attrlen > page_len) {
if (res->acl_flags & NFS4_ACL_LEN_REQUEST) {
/* getxattr interface called with a NULL buf */
res->acl_len = attrlen;
goto out;
}
dprintk("NFS: acl reply: attrlen %u > page_len %zu\n",
attrlen, page_len);
return -EINVAL;
}
xdr_read_pages(xdr, attrlen);
res->acl_len = attrlen;
} else
status = -EOPNOTSUPP;
out:
return status;
}
static int
decode_savefh(struct xdr_stream *xdr)
{
return decode_op_hdr(xdr, OP_SAVEFH);
}
static int decode_setattr(struct xdr_stream *xdr)
{
__be32 *p;
uint32_t bmlen;
int status;
status = decode_op_hdr(xdr, OP_SETATTR);
if (status)
return status;
p = xdr_inline_decode(xdr, 4);
if (unlikely(!p))
goto out_overflow;
bmlen = be32_to_cpup(p);
p = xdr_inline_decode(xdr, bmlen << 2);
if (likely(p))
return 0;
out_overflow:
print_overflow_msg(__func__, xdr);
return -EIO;
}
static int decode_setclientid(struct xdr_stream *xdr, struct nfs4_setclientid_res *res)
{
__be32 *p;
uint32_t opnum;
int32_t nfserr;
p = xdr_inline_decode(xdr, 8);
if (unlikely(!p))
goto out_overflow;
opnum = be32_to_cpup(p++);
if (opnum != OP_SETCLIENTID) {
dprintk("nfs: decode_setclientid: Server returned operation"
" %d\n", opnum);
return -EIO;
}
nfserr = be32_to_cpup(p);
if (nfserr == NFS_OK) {
p = xdr_inline_decode(xdr, 8 + NFS4_VERIFIER_SIZE);
if (unlikely(!p))
goto out_overflow;
p = xdr_decode_hyper(p, &res->clientid);
memcpy(res->confirm.data, p, NFS4_VERIFIER_SIZE);
} else if (nfserr == NFSERR_CLID_INUSE) {
uint32_t len;
/* skip netid string */
p = xdr_inline_decode(xdr, 4);
if (unlikely(!p))
goto out_overflow;
len = be32_to_cpup(p);
p = xdr_inline_decode(xdr, len);
if (unlikely(!p))
goto out_overflow;
/* skip uaddr string */
p = xdr_inline_decode(xdr, 4);
if (unlikely(!p))
goto out_overflow;
len = be32_to_cpup(p);
p = xdr_inline_decode(xdr, len);
if (unlikely(!p))
goto out_overflow;
return -NFSERR_CLID_INUSE;
} else
return nfs4_stat_to_errno(nfserr);
return 0;
out_overflow:
print_overflow_msg(__func__, xdr);
return -EIO;
}
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)
{
__be32 *p;
int status;
status = decode_op_hdr(xdr, OP_WRITE);
if (status)
return status;
p = xdr_inline_decode(xdr, 16);
if (unlikely(!p))
goto out_overflow;
res->count = be32_to_cpup(p++);
res->verf->committed = be32_to_cpup(p++);
memcpy(res->verf->verifier, p, NFS4_VERIFIER_SIZE);
return 0;
out_overflow:
print_overflow_msg(__func__, xdr);
return -EIO;
}
static int decode_delegreturn(struct xdr_stream *xdr)
{
return decode_op_hdr(xdr, OP_DELEGRETURN);
}
static int decode_secinfo_gss(struct xdr_stream *xdr, struct nfs4_secinfo_flavor *flavor)
{
__be32 *p;
p = xdr_inline_decode(xdr, 4);
if (unlikely(!p))
goto out_overflow;
flavor->gss.sec_oid4.len = be32_to_cpup(p);
if (flavor->gss.sec_oid4.len > GSS_OID_MAX_LEN)
goto out_err;
p = xdr_inline_decode(xdr, flavor->gss.sec_oid4.len);
if (unlikely(!p))
goto out_overflow;
memcpy(flavor->gss.sec_oid4.data, p, flavor->gss.sec_oid4.len);
p = xdr_inline_decode(xdr, 8);
if (unlikely(!p))
goto out_overflow;
flavor->gss.qop4 = be32_to_cpup(p++);
flavor->gss.service = be32_to_cpup(p);
return 0;
out_overflow:
print_overflow_msg(__func__, xdr);
return -EIO;
out_err:
return -EINVAL;
}
static int decode_secinfo_common(struct xdr_stream *xdr, struct nfs4_secinfo_res *res)
{
struct nfs4_secinfo_flavor *sec_flavor;
int status;
__be32 *p;
int i, num_flavors;
p = xdr_inline_decode(xdr, 4);
if (unlikely(!p))
goto out_overflow;
res->flavors->num_flavors = 0;
num_flavors = be32_to_cpup(p);
for (i = 0; i < num_flavors; i++) {
sec_flavor = &res->flavors->flavors[i];
if ((char *)&sec_flavor[1] - (char *)res->flavors > PAGE_SIZE)
break;
p = xdr_inline_decode(xdr, 4);
if (unlikely(!p))
goto out_overflow;
sec_flavor->flavor = be32_to_cpup(p);
if (sec_flavor->flavor == RPC_AUTH_GSS) {
status = decode_secinfo_gss(xdr, sec_flavor);
if (status)
goto out;
}
res->flavors->num_flavors++;
}
status = 0;
out:
return status;
out_overflow:
print_overflow_msg(__func__, xdr);
return -EIO;
}
static int decode_secinfo(struct xdr_stream *xdr, struct nfs4_secinfo_res *res)
{
int status = decode_op_hdr(xdr, OP_SECINFO);
if (status)
return status;
return decode_secinfo_common(xdr, res);
}
#if defined(CONFIG_NFS_V4_1)
static int decode_secinfo_no_name(struct xdr_stream *xdr, struct nfs4_secinfo_res *res)
{
int status = decode_op_hdr(xdr, OP_SECINFO_NO_NAME);
if (status)
return status;
return decode_secinfo_common(xdr, res);
}
static int decode_exchange_id(struct xdr_stream *xdr,
struct nfs41_exchange_id_res *res)
{
__be32 *p;
uint32_t dummy;
char *dummy_str;
int status;
struct nfs_client *clp = res->client;
uint32_t impl_id_count;
status = decode_op_hdr(xdr, OP_EXCHANGE_ID);
if (status)
return status;
p = xdr_inline_decode(xdr, 8);
if (unlikely(!p))
goto out_overflow;
xdr_decode_hyper(p, &clp->cl_clientid);
p = xdr_inline_decode(xdr, 12);
if (unlikely(!p))
goto out_overflow;
clp->cl_seqid = be32_to_cpup(p++);
clp->cl_exchange_flags = be32_to_cpup(p++);
/* We ask for SP4_NONE */
dummy = be32_to_cpup(p);
if (dummy != SP4_NONE)
return -EIO;
/* Throw away minor_id */
p = xdr_inline_decode(xdr, 8);
if (unlikely(!p))
goto out_overflow;
/* Throw away Major id */
status = decode_opaque_inline(xdr, &dummy, &dummy_str);
if (unlikely(status))
return status;
/* Save server_scope */
status = decode_opaque_inline(xdr, &dummy, &dummy_str);
if (unlikely(status))
return status;
if (unlikely(dummy > NFS4_OPAQUE_LIMIT))
return -EIO;
memcpy(res->server_scope->server_scope, dummy_str, dummy);
res->server_scope->server_scope_sz = dummy;
/* Implementation Id */
p = xdr_inline_decode(xdr, 4);
if (unlikely(!p))
goto out_overflow;
impl_id_count = be32_to_cpup(p++);
if (impl_id_count) {
/* nii_domain */
status = decode_opaque_inline(xdr, &dummy, &dummy_str);
if (unlikely(status))
return status;
if (unlikely(dummy > NFS4_OPAQUE_LIMIT))
return -EIO;
memcpy(res->impl_id->domain, dummy_str, dummy);
/* nii_name */
status = decode_opaque_inline(xdr, &dummy, &dummy_str);
if (unlikely(status))
return status;
if (unlikely(dummy > NFS4_OPAQUE_LIMIT))
return -EIO;
memcpy(res->impl_id->name, dummy_str, dummy);
/* nii_date */
p = xdr_inline_decode(xdr, 12);
if (unlikely(!p))
goto out_overflow;
p = xdr_decode_hyper(p, &res->impl_id->date.seconds);
res->impl_id->date.nseconds = be32_to_cpup(p);
/* if there's more than one entry, ignore the rest */
}
return 0;
out_overflow:
print_overflow_msg(__func__, xdr);
return -EIO;
}
static int decode_chan_attrs(struct xdr_stream *xdr,
struct nfs4_channel_attrs *attrs)
{
__be32 *p;
u32 nr_attrs, val;
p = xdr_inline_decode(xdr, 28);
if (unlikely(!p))
goto out_overflow;
val = be32_to_cpup(p++); /* headerpadsz */
if (val)
return -EINVAL; /* no support for header padding yet */
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++);
nr_attrs = be32_to_cpup(p);
if (unlikely(nr_attrs > 1)) {
printk(KERN_WARNING "NFS: %s: Invalid rdma channel attrs "
"count %u\n", __func__, nr_attrs);
return -EINVAL;
}
if (nr_attrs == 1) {
p = xdr_inline_decode(xdr, 4); /* skip rdma_attrs */
if (unlikely(!p))
goto out_overflow;
}
return 0;
out_overflow:
print_overflow_msg(__func__, xdr);
return -EIO;
}
static int decode_sessionid(struct xdr_stream *xdr, struct nfs4_sessionid *sid)
{
return decode_opaque_fixed(xdr, sid->data, NFS4_MAX_SESSIONID_LEN);
}
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);
if (!status)
status = decode_sessionid(xdr, &session->sess_id);
if (unlikely(status))
return status;
/* seqid, flags */
p = xdr_inline_decode(xdr, 8);
if (unlikely(!p))
goto out_overflow;
clp->cl_seqid = be32_to_cpup(p++);
session->flags = be32_to_cpup(p);
/* Channel attributes */
status = decode_chan_attrs(xdr, &session->fc_attrs);
if (!status)
status = decode_chan_attrs(xdr, &session->bc_attrs);
return status;
out_overflow:
print_overflow_msg(__func__, xdr);
return -EIO;
}
static int decode_destroy_session(struct xdr_stream *xdr, void *dummy)
{
return decode_op_hdr(xdr, OP_DESTROY_SESSION);
}
static int decode_reclaim_complete(struct xdr_stream *xdr, void *dummy)
{
return decode_op_hdr(xdr, OP_RECLAIM_COMPLETE);
}
#endif /* CONFIG_NFS_V4_1 */
static int decode_sequence(struct xdr_stream *xdr,
struct nfs4_sequence_res *res,
struct rpc_rqst *rqstp)
{
#if defined(CONFIG_NFS_V4_1)
struct nfs4_sessionid id;
u32 dummy;
int status;
__be32 *p;
if (!res->sr_session)
return 0;
status = decode_op_hdr(xdr, OP_SEQUENCE);
if (!status)
status = decode_sessionid(xdr, &id);
if (unlikely(status))
goto out_err;
/*
* If the server returns different values for sessionID, slotID or
* sequence number, the server is looney tunes.
*/
status = -EREMOTEIO;
if (memcmp(id.data, res->sr_session->sess_id.data,
NFS4_MAX_SESSIONID_LEN)) {
dprintk("%s Invalid session id\n", __func__);
goto out_err;
}
p = xdr_inline_decode(xdr, 20);
if (unlikely(!p))
goto out_overflow;
/* seqid */
dummy = be32_to_cpup(p++);
if (dummy != res->sr_slot->seq_nr) {
dprintk("%s Invalid sequence number\n", __func__);
goto out_err;
}
/* slot id */
dummy = be32_to_cpup(p++);
if (dummy != res->sr_slot - res->sr_session->fc_slot_table.slots) {
dprintk("%s Invalid slot id\n", __func__);
goto out_err;
}
/* highest slot id - currently not processed */
dummy = be32_to_cpup(p++);
/* target highest slot id - currently not processed */
dummy = be32_to_cpup(p++);
/* result flags */
res->sr_status_flags = be32_to_cpup(p);
status = 0;
out_err:
res->sr_status = status;
return status;
out_overflow:
print_overflow_msg(__func__, xdr);
status = -EIO;
goto out_err;
#else /* CONFIG_NFS_V4_1 */
return 0;
#endif /* CONFIG_NFS_V4_1 */
}
#if defined(CONFIG_NFS_V4_1)
/*
* TODO: Need to handle case when EOF != true;
*/
static int decode_getdevicelist(struct xdr_stream *xdr,
struct pnfs_devicelist *res)
{
__be32 *p;
int status, i;
struct nfs_writeverf verftemp;
status = decode_op_hdr(xdr, OP_GETDEVICELIST);
if (status)
return status;
p = xdr_inline_decode(xdr, 8 + 8 + 4);
if (unlikely(!p))
goto out_overflow;
/* TODO: Skip cookie for now */
p += 2;
/* Read verifier */
p = xdr_decode_opaque_fixed(p, verftemp.verifier, NFS4_VERIFIER_SIZE);
res->num_devs = be32_to_cpup(p);
dprintk("%s: num_dev %d\n", __func__, res->num_devs);
if (res->num_devs > NFS4_PNFS_GETDEVLIST_MAXNUM) {
printk(KERN_ERR "NFS: %s too many result dev_num %u\n",
__func__, res->num_devs);
return -EIO;
}
p = xdr_inline_decode(xdr,
res->num_devs * NFS4_DEVICEID4_SIZE + 4);
if (unlikely(!p))
goto out_overflow;
for (i = 0; i < res->num_devs; i++)
p = xdr_decode_opaque_fixed(p, res->dev_id[i].data,
NFS4_DEVICEID4_SIZE);
res->eof = be32_to_cpup(p);
return 0;
out_overflow:
print_overflow_msg(__func__, xdr);
return -EIO;
}
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) {
uint32_t 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;
struct xdr_buf *rcvbuf = &req->rq_rcv_buf;
struct kvec *iov = rcvbuf->head;
u32 hdrlen, recvd;
status = decode_op_hdr(xdr, OP_LAYOUTGET);
if (status)
return status;
p = xdr_inline_decode(xdr, 4);
if (unlikely(!p))
goto out_overflow;
res->return_on_close = be32_to_cpup(p);
decode_stateid(xdr, &res->stateid);
p = xdr_inline_decode(xdr, 4);
if (unlikely(!p))
goto out_overflow;
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, 28);
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++);
res->layoutp->len = be32_to_cpup(p);
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->layoutp->len);
hdrlen = (u8 *) xdr->p - (u8 *) iov->iov_base;
recvd = req->rq_rcv_buf.len - hdrlen;
if (res->layoutp->len > recvd) {
dprintk("NFS: server cheating in layoutget reply: "
"layout len %u > recvd %u\n",
res->layoutp->len, recvd);
return -EINVAL;
}
xdr_read_pages(xdr, res->layoutp->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;
}
static int decode_layoutreturn(struct xdr_stream *xdr,
struct nfs4_layoutreturn_res *res)
{
__be32 *p;
int status;
status = decode_op_hdr(xdr, OP_LAYOUTRETURN);
if (status)
return status;
p = xdr_inline_decode(xdr, 4);
if (unlikely(!p))
goto out_overflow;
res->lrs_present = be32_to_cpup(p);
if (res->lrs_present)
status = decode_stateid(xdr, &res->stateid);
return status;
out_overflow:
print_overflow_msg(__func__, xdr);
return -EIO;
}
static int decode_layoutcommit(struct xdr_stream *xdr,
struct rpc_rqst *req,
struct nfs4_layoutcommit_res *res)
{
__be32 *p;
__u32 sizechanged;
int status;
status = decode_op_hdr(xdr, OP_LAYOUTCOMMIT);
res->status = status;
if (status)
return status;
p = xdr_inline_decode(xdr, 4);
if (unlikely(!p))
goto out_overflow;
sizechanged = be32_to_cpup(p);
if (sizechanged) {
/* throw away new size */
p = xdr_inline_decode(xdr, 8);
if (unlikely(!p))
goto out_overflow;
}
return 0;
out_overflow:
print_overflow_msg(__func__, xdr);
return -EIO;
}
static int decode_test_stateid(struct xdr_stream *xdr,
struct nfs41_test_stateid_res *res)
{
__be32 *p;
int status;
int num_res;
status = decode_op_hdr(xdr, OP_TEST_STATEID);
if (status)
return status;
p = xdr_inline_decode(xdr, 4);
if (unlikely(!p))
goto out_overflow;
num_res = be32_to_cpup(p++);
if (num_res != 1)
goto out;
p = xdr_inline_decode(xdr, 4);
if (unlikely(!p))
goto out_overflow;
res->status = be32_to_cpup(p++);
return status;
out_overflow:
print_overflow_msg(__func__, xdr);
out:
return -EIO;
}
static int decode_free_stateid(struct xdr_stream *xdr,
struct nfs41_free_stateid_res *res)
{
__be32 *p;
int status;
status = decode_op_hdr(xdr, OP_FREE_STATEID);
if (status)
return status;
p = xdr_inline_decode(xdr, 4);
if (unlikely(!p))
goto out_overflow;
res->status = be32_to_cpup(p++);
return res->status;
out_overflow:
print_overflow_msg(__func__, xdr);
return -EIO;
}
#endif /* CONFIG_NFS_V4_1 */
/*
* END OF "GENERIC" DECODE ROUTINES.
*/
/*
* Decode OPEN_DOWNGRADE response
*/
static int nfs4_xdr_dec_open_downgrade(struct rpc_rqst *rqstp,
struct xdr_stream *xdr,
struct nfs_closeres *res)
{
struct compound_hdr hdr;
int status;
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_open_downgrade(xdr, res);
if (status != 0)
goto out;
decode_getfattr(xdr, res->fattr, res->server);
out:
return status;
}
/*
* Decode ACCESS response
*/
static int nfs4_xdr_dec_access(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
struct nfs4_accessres *res)
{
struct compound_hdr hdr;
int status;
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 != 0)
goto out;
status = decode_access(xdr, res);
if (status != 0)
goto out;
decode_getfattr(xdr, res->fattr, res->server);
out:
return status;
}
/*
* Decode LOOKUP response
*/
static int nfs4_xdr_dec_lookup(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
struct nfs4_lookup_res *res)
{
struct compound_hdr hdr;
int status;
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_lookup(xdr);
if (status)
goto out;
status = decode_getfh(xdr, res->fh);
if (status)
goto out;
status = decode_getfattr(xdr, res->fattr, res->server);
out:
return status;
}
/*
* Decode LOOKUP_ROOT response
*/
static int nfs4_xdr_dec_lookup_root(struct rpc_rqst *rqstp,
struct xdr_stream *xdr,
struct nfs4_lookup_res *res)
{
struct compound_hdr hdr;
int status;
status = decode_compound_hdr(xdr, &hdr);
if (status)
goto out;
status = decode_sequence(xdr, &res->seq_res, rqstp);
if (status)
goto out;
status = decode_putrootfh(xdr);
if (status)
goto out;
status = decode_getfh(xdr, res->fh);
if (status == 0)
status = decode_getfattr(xdr, res->fattr, res->server);
out:
return status;
}
/*
* Decode REMOVE response
*/
static int nfs4_xdr_dec_remove(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
struct nfs_removeres *res)
{
struct compound_hdr hdr;
int status;
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_remove(xdr, &res->cinfo);
if (status)
goto out;
decode_getfattr(xdr, res->dir_attr, res->server);
out:
return status;
}
/*
* Decode RENAME response
*/
static int nfs4_xdr_dec_rename(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
struct nfs_renameres *res)
{
struct compound_hdr hdr;
int status;
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_savefh(xdr);
if (status)
goto out;
status = decode_putfh(xdr);
if (status)
goto out;
status = decode_rename(xdr, &res->old_cinfo, &res->new_cinfo);
if (status)
goto out;
/* Current FH is target directory */
if (decode_getfattr(xdr, res->new_fattr, res->server))
goto out;
status = decode_restorefh(xdr);
if (status)
goto out;
decode_getfattr(xdr, res->old_fattr, res->server);
out:
return status;
}
/*
* Decode LINK response
*/
static int nfs4_xdr_dec_link(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
struct nfs4_link_res *res)
{
struct compound_hdr hdr;
int status;
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_savefh(xdr);
if (status)
goto out;
status = decode_putfh(xdr);
if (status)
goto out;
status = decode_link(xdr, &res->cinfo);
if (status)
goto out;
/*
* Note order: OP_LINK leaves the directory as the current
* filehandle.
*/
if (decode_getfattr(xdr, res->dir_attr, res->server))
goto out;
status = decode_restorefh(xdr);
if (status)
goto out;
decode_getfattr(xdr, res->fattr, res->server);
out:
return status;
}
/*
* Decode CREATE response
*/
static int nfs4_xdr_dec_create(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
struct nfs4_create_res *res)
{
struct compound_hdr hdr;
int status;
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_savefh(xdr);
if (status)
goto out;
status = decode_create(xdr, &res->dir_cinfo);
if (status)
goto out;
status = decode_getfh(xdr, res->fh);
if (status)
goto out;
if (decode_getfattr(xdr, res->fattr, res->server))
goto out;
status = decode_restorefh(xdr);
if (status)
goto out;
decode_getfattr(xdr, res->dir_fattr, res->server);
out:
return status;
}
/*
* Decode SYMLINK response
*/
static int nfs4_xdr_dec_symlink(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
struct nfs4_create_res *res)
{
return nfs4_xdr_dec_create(rqstp, xdr, res);
}
/*
* Decode GETATTR response
*/
static int nfs4_xdr_dec_getattr(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
struct nfs4_getattr_res *res)
{
struct compound_hdr hdr;
int status;
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_getfattr(xdr, res->fattr, res->server);
out:
return status;
}
/*
* Encode an SETACL request
*/
static void nfs4_xdr_enc_setacl(struct rpc_rqst *req, struct xdr_stream *xdr,
struct nfs_setaclargs *args)
{
struct compound_hdr hdr = {
.minorversion = nfs4_xdr_minorversion(&args->seq_args),
};
encode_compound_hdr(xdr, req, &hdr);
encode_sequence(xdr, &args->seq_args, &hdr);
encode_putfh(xdr, args->fh, &hdr);
encode_setacl(xdr, args, &hdr);
encode_nops(&hdr);
}
/*
* Decode SETACL response
*/
static int
nfs4_xdr_dec_setacl(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
struct nfs_setaclres *res)
{
struct compound_hdr hdr;
int status;
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_setattr(xdr);
out:
return status;
}
/*
* Decode GETACL response
*/
static int
nfs4_xdr_dec_getacl(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
struct nfs_getaclres *res)
{
struct compound_hdr hdr;
int status;
if (res->acl_scratch != NULL) {
void *p = page_address(res->acl_scratch);
xdr_set_scratch_buffer(xdr, p, PAGE_SIZE);
}
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_getacl(xdr, rqstp, res);
out:
return status;
}
/*
* Decode CLOSE response
*/
static int nfs4_xdr_dec_close(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
struct nfs_closeres *res)
{
struct compound_hdr hdr;
int status;
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_close(xdr, res);
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.
*/
decode_getfattr(xdr, res->fattr, res->server);
out:
return status;
}
/*
* Decode OPEN response
*/
static int nfs4_xdr_dec_open(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
struct nfs_openres *res)
{
struct compound_hdr hdr;
int status;
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_savefh(xdr);
if (status)
goto out;
status = decode_open(xdr, res);
if (status)
goto out;
if (decode_getfh(xdr, &res->fh) != 0)
goto out;
if (decode_getfattr(xdr, res->f_attr, res->server) != 0)
goto out;
if (decode_restorefh(xdr) != 0)
goto out;
decode_getfattr(xdr, res->dir_attr, res->server);
out:
return status;
}
/*
* Decode OPEN_CONFIRM response
*/
static int nfs4_xdr_dec_open_confirm(struct rpc_rqst *rqstp,
struct xdr_stream *xdr,
struct nfs_open_confirmres *res)
{
struct compound_hdr hdr;
int status;
status = decode_compound_hdr(xdr, &hdr);
if (status)
goto out;
status = decode_putfh(xdr);
if (status)
goto out;
status = decode_open_confirm(xdr, res);
out:
return status;
}
/*
* Decode OPEN response
*/
static int nfs4_xdr_dec_open_noattr(struct rpc_rqst *rqstp,
struct xdr_stream *xdr,
struct nfs_openres *res)
{
struct compound_hdr hdr;
int status;
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_open(xdr, res);
if (status)
goto out;
decode_getfattr(xdr, res->f_attr, res->server);
out:
return status;
}
/*
* Decode SETATTR response
*/
static int nfs4_xdr_dec_setattr(struct rpc_rqst *rqstp,
struct xdr_stream *xdr,
struct nfs_setattrres *res)
{
struct compound_hdr hdr;
int status;
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_setattr(xdr);
if (status)
goto out;
decode_getfattr(xdr, res->fattr, res->server);
out:
return status;
}
/*
* Decode LOCK response
*/
static int nfs4_xdr_dec_lock(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
struct nfs_lock_res *res)
{
struct compound_hdr hdr;
int status;
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_lock(xdr, res);
out:
return status;
}
/*
* Decode LOCKT response
*/
static int nfs4_xdr_dec_lockt(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
struct nfs_lockt_res *res)
{
struct compound_hdr hdr;
int status;
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_lockt(xdr, res);
out:
return status;
}
/*
* Decode LOCKU response
*/
static int nfs4_xdr_dec_locku(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
struct nfs_locku_res *res)
{
struct compound_hdr hdr;
int status;
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_locku(xdr, res);
out:
return status;
}
static int nfs4_xdr_dec_release_lockowner(struct rpc_rqst *rqstp,
struct xdr_stream *xdr, void *dummy)
{
struct compound_hdr hdr;
int status;
status = decode_compound_hdr(xdr, &hdr);
if (!status)
status = decode_release_lockowner(xdr);
return status;
}
/*
* Decode READLINK response
*/
static int nfs4_xdr_dec_readlink(struct rpc_rqst *rqstp,
struct xdr_stream *xdr,
struct nfs4_readlink_res *res)
{
struct compound_hdr hdr;
int status;
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_readlink(xdr, rqstp);
out:
return status;
}
/*
* Decode READDIR response
*/
static int nfs4_xdr_dec_readdir(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
struct nfs4_readdir_res *res)
{
struct compound_hdr hdr;
int status;
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_readdir(xdr, rqstp, res);
out:
return status;
}
/*
* Decode Read response
*/
static int nfs4_xdr_dec_read(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
struct nfs_readres *res)
{
struct compound_hdr hdr;
int status;
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_read(xdr, rqstp, res);
if (!status)
status = res->count;
out:
return status;
}
/*
* Decode WRITE response
*/
static int nfs4_xdr_dec_write(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
struct nfs_writeres *res)
{
struct compound_hdr hdr;
int status;
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_write(xdr, res);
if (status)
goto out;
if (res->fattr)
decode_getfattr(xdr, res->fattr, res->server);
if (!status)
status = res->count;
out:
return status;
}
/*
* Decode COMMIT response
*/
static int nfs4_xdr_dec_commit(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
struct nfs_writeres *res)
{
struct compound_hdr hdr;
int status;
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_commit(xdr, res);
if (status)
goto out;
if (res->fattr)
decode_getfattr(xdr, res->fattr, res->server);
out:
return status;
}
/*
* Decode FSINFO response
*/
static int nfs4_xdr_dec_fsinfo(struct rpc_rqst *req, struct xdr_stream *xdr,
struct nfs4_fsinfo_res *res)
{
struct compound_hdr hdr;
int status;
status = decode_compound_hdr(xdr, &hdr);
if (!status)
status = decode_sequence(xdr, &res->seq_res, req);
if (!status)
status = decode_putfh(xdr);
if (!status)
status = decode_fsinfo(xdr, res->fsinfo);
return status;
}
/*
* Decode PATHCONF response
*/
static int nfs4_xdr_dec_pathconf(struct rpc_rqst *req, struct xdr_stream *xdr,
struct nfs4_pathconf_res *res)
{
struct compound_hdr hdr;
int status;
status = decode_compound_hdr(xdr, &hdr);
if (!status)
status = decode_sequence(xdr, &res->seq_res, req);
if (!status)
status = decode_putfh(xdr);
if (!status)
status = decode_pathconf(xdr, res->pathconf);
return status;
}
/*
* Decode STATFS response
*/
static int nfs4_xdr_dec_statfs(struct rpc_rqst *req, struct xdr_stream *xdr,
struct nfs4_statfs_res *res)
{
struct compound_hdr hdr;
int status;
status = decode_compound_hdr(xdr, &hdr);
if (!status)
status = decode_sequence(xdr, &res->seq_res, req);
if (!status)
status = decode_putfh(xdr);
if (!status)
status = decode_statfs(xdr, res->fsstat);
return status;
}
/*
* Decode GETATTR_BITMAP response
*/
static int nfs4_xdr_dec_server_caps(struct rpc_rqst *req,
struct xdr_stream *xdr,
struct nfs4_server_caps_res *res)
{
struct compound_hdr hdr;
int status;
status = decode_compound_hdr(xdr, &hdr);
if (status)
goto out;
status = decode_sequence(xdr, &res->seq_res, req);
if (status)
goto out;
status = decode_putfh(xdr);
if (status)
goto out;
status = decode_server_caps(xdr, res);
out:
return status;
}
/*
* Decode RENEW response
*/
static int nfs4_xdr_dec_renew(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
void *__unused)
{
struct compound_hdr hdr;
int status;
status = decode_compound_hdr(xdr, &hdr);
if (!status)
status = decode_renew(xdr);
return status;
}
/*
* Decode SETCLIENTID response
*/
static int nfs4_xdr_dec_setclientid(struct rpc_rqst *req,
struct xdr_stream *xdr,
struct nfs4_setclientid_res *res)
{
struct compound_hdr hdr;
int status;
status = decode_compound_hdr(xdr, &hdr);
if (!status)
status = decode_setclientid(xdr, res);
return status;
}
/*
* Decode SETCLIENTID_CONFIRM response
*/
static int nfs4_xdr_dec_setclientid_confirm(struct rpc_rqst *req,
struct xdr_stream *xdr,
struct nfs_fsinfo *fsinfo)
{
struct compound_hdr hdr;
int status;
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;
}
/*
* Decode DELEGRETURN response
*/
static int nfs4_xdr_dec_delegreturn(struct rpc_rqst *rqstp,
struct xdr_stream *xdr,
struct nfs4_delegreturnres *res)
{
struct compound_hdr hdr;
int status;
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 != 0)
goto out;
status = decode_delegreturn(xdr);
if (status != 0)
goto out;
decode_getfattr(xdr, res->fattr, res->server);
out:
return status;
}
/*
* Decode FS_LOCATIONS response
*/
static int nfs4_xdr_dec_fs_locations(struct rpc_rqst *req,
struct xdr_stream *xdr,
struct nfs4_fs_locations_res *res)
{
struct compound_hdr hdr;
int status;
status = decode_compound_hdr(xdr, &hdr);
if (status)
goto out;
status = decode_sequence(xdr, &res->seq_res, req);
if (status)
goto out;
status = decode_putfh(xdr);
if (status)
goto out;
status = decode_lookup(xdr);
if (status)
goto out;
xdr_enter_page(xdr, PAGE_SIZE);
status = decode_getfattr_generic(xdr, &res->fs_locations->fattr,
NULL, res->fs_locations,
res->fs_locations->server);
out:
return status;
}
/*
* Decode SECINFO response
*/
static int nfs4_xdr_dec_secinfo(struct rpc_rqst *rqstp,
struct xdr_stream *xdr,
struct nfs4_secinfo_res *res)
{
struct compound_hdr hdr;
int status;
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_secinfo(xdr, res);
out:
return status;
}
#if defined(CONFIG_NFS_V4_1)
/*
* Decode EXCHANGE_ID response
*/
static int nfs4_xdr_dec_exchange_id(struct rpc_rqst *rqstp,
struct xdr_stream *xdr,
void *res)
{
struct compound_hdr hdr;
int status;
status = decode_compound_hdr(xdr, &hdr);
if (!status)
status = decode_exchange_id(xdr, res);
return status;
}
/*
* Decode CREATE_SESSION response
*/
static int nfs4_xdr_dec_create_session(struct rpc_rqst *rqstp,
struct xdr_stream *xdr,
struct nfs41_create_session_res *res)
{
struct compound_hdr hdr;
int status;
status = decode_compound_hdr(xdr, &hdr);
if (!status)
status = decode_create_session(xdr, res);
return status;
}
/*
* Decode DESTROY_SESSION response
*/
static int nfs4_xdr_dec_destroy_session(struct rpc_rqst *rqstp,
struct xdr_stream *xdr,
void *res)
{
struct compound_hdr hdr;
int status;
status = decode_compound_hdr(xdr, &hdr);
if (!status)
status = decode_destroy_session(xdr, res);
return status;
}
/*
* Decode SEQUENCE response
*/
static int nfs4_xdr_dec_sequence(struct rpc_rqst *rqstp,
struct xdr_stream *xdr,
struct nfs4_sequence_res *res)
{
struct compound_hdr hdr;
int status;
status = decode_compound_hdr(xdr, &hdr);
if (!status)
status = decode_sequence(xdr, res, rqstp);
return status;
}
/*
* Decode GET_LEASE_TIME response
*/
static int nfs4_xdr_dec_get_lease_time(struct rpc_rqst *rqstp,
struct xdr_stream *xdr,
struct nfs4_get_lease_time_res *res)
{
struct compound_hdr hdr;
int status;
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;
}
/*
* Decode RECLAIM_COMPLETE response
*/
static int nfs4_xdr_dec_reclaim_complete(struct rpc_rqst *rqstp,
struct xdr_stream *xdr,
struct nfs41_reclaim_complete_res *res)
{
struct compound_hdr hdr;
int status;
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;
}
/*
* Decode GETDEVICELIST response
*/
static int nfs4_xdr_dec_getdevicelist(struct rpc_rqst *rqstp,
struct xdr_stream *xdr,
struct nfs4_getdevicelist_res *res)
{
struct compound_hdr hdr;
int status;
dprintk("encoding getdevicelist!\n");
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_putfh(xdr);
if (status != 0)
goto out;
status = decode_getdevicelist(xdr, res->devlist);
out:
return status;
}
/*
* Decode GETDEVINFO response
*/
static int nfs4_xdr_dec_getdeviceinfo(struct rpc_rqst *rqstp,
struct xdr_stream *xdr,
struct nfs4_getdeviceinfo_res *res)
{
struct compound_hdr hdr;
int status;
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,
struct xdr_stream *xdr,
struct nfs4_layoutget_res *res)
{
struct compound_hdr hdr;
int status;
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;
}
/*
* Decode LAYOUTRETURN response
*/
static int nfs4_xdr_dec_layoutreturn(struct rpc_rqst *rqstp,
struct xdr_stream *xdr,
struct nfs4_layoutreturn_res *res)
{
struct compound_hdr hdr;
int status;
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_layoutreturn(xdr, res);
out:
return status;
}
/*
* Decode LAYOUTCOMMIT response
*/
static int nfs4_xdr_dec_layoutcommit(struct rpc_rqst *rqstp,
struct xdr_stream *xdr,
struct nfs4_layoutcommit_res *res)
{
struct compound_hdr hdr;
int status;
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_layoutcommit(xdr, rqstp, res);
if (status)
goto out;
decode_getfattr(xdr, res->fattr, res->server);
out:
return status;
}
/*
* Decode SECINFO_NO_NAME response
*/
static int nfs4_xdr_dec_secinfo_no_name(struct rpc_rqst *rqstp,
struct xdr_stream *xdr,
struct nfs4_secinfo_res *res)
{
struct compound_hdr hdr;
int status;
status = decode_compound_hdr(xdr, &hdr);
if (status)
goto out;
status = decode_sequence(xdr, &res->seq_res, rqstp);
if (status)
goto out;
status = decode_putrootfh(xdr);
if (status)
goto out;
status = decode_secinfo_no_name(xdr, res);
out:
return status;
}
/*
* Decode TEST_STATEID response
*/
static int nfs4_xdr_dec_test_stateid(struct rpc_rqst *rqstp,
struct xdr_stream *xdr,
struct nfs41_test_stateid_res *res)
{
struct compound_hdr hdr;
int status;
status = decode_compound_hdr(xdr, &hdr);
if (status)
goto out;
status = decode_sequence(xdr, &res->seq_res, rqstp);
if (status)
goto out;
status = decode_test_stateid(xdr, res);
out:
return status;
}
/*
* Decode FREE_STATEID response
*/
static int nfs4_xdr_dec_free_stateid(struct rpc_rqst *rqstp,
struct xdr_stream *xdr,
struct nfs41_free_stateid_res *res)
{
struct compound_hdr hdr;
int status;
status = decode_compound_hdr(xdr, &hdr);
if (status)
goto out;
status = decode_sequence(xdr, &res->seq_res, rqstp);
if (status)
goto out;
status = decode_free_stateid(xdr, res);
out:
return status;
}
#endif /* CONFIG_NFS_V4_1 */
/**
* 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)
{
uint32_t bitmap[3] = {0};
uint32_t len;
__be32 *p = xdr_inline_decode(xdr, 4);
if (unlikely(!p))
goto out_overflow;
if (*p == xdr_zero) {
p = xdr_inline_decode(xdr, 4);
if (unlikely(!p))
goto out_overflow;
if (*p == xdr_zero)
return -EAGAIN;
entry->eof = 1;
return -EBADCOOKIE;
}
p = xdr_inline_decode(xdr, 12);
if (unlikely(!p))
goto out_overflow;
entry->prev_cookie = entry->cookie;
p = xdr_decode_hyper(p, &entry->cookie);
entry->len = be32_to_cpup(p);
p = xdr_inline_decode(xdr, entry->len);
if (unlikely(!p))
goto out_overflow;
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;
entry->fattr->valid = 0;
if (decode_attr_bitmap(xdr, bitmap) < 0)
goto out_overflow;
if (decode_attr_length(xdr, &len, &p) < 0)
goto out_overflow;
if (decode_getfattr_attrs(xdr, bitmap, entry->fattr, entry->fh,
NULL, entry->server) < 0)
goto out_overflow;
if (entry->fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID)
entry->ino = entry->fattr->mounted_on_fileid;
else if (entry->fattr->valid & NFS_ATTR_FATTR_FILEID)
entry->ino = entry->fattr->fileid;
entry->d_type = DT_UNKNOWN;
if (entry->fattr->valid & NFS_ATTR_FATTR_TYPE)
entry->d_type = nfs_umode_to_dtype(entry->fattr->mode);
return 0;
out_overflow:
print_overflow_msg(__func__, xdr);
return -EAGAIN;
}
/*
* 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 },
{ 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_BAD_COOKIE, -EBADCOOKIE },
{ NFS4ERR_NOTSUPP, -ENOTSUPP },
{ NFS4ERR_TOOSMALL, -ETOOSMALL },
{ NFS4ERR_SERVERFAULT, -EREMOTEIO },
{ NFS4ERR_BADTYPE, -EBADTYPE },
{ NFS4ERR_LOCKED, -EAGAIN },
{ NFS4ERR_SYMLINK, -ELOOP },
{ NFS4ERR_OP_ILLEGAL, -EOPNOTSUPP },
{ NFS4ERR_DEADLOCK, -EDEADLK },
{ -1, -EIO }
};
/*
* Convert an NFS error code to a local one.
* This one is used jointly by NFSv2 and NFSv3.
*/
static int
nfs4_stat_to_errno(int stat)
{
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. */
return -EREMOTEIO;
}
/* 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.
*/
return -stat;
}
#define PROC(proc, argtype, restype) \
[NFSPROC4_CLNT_##proc] = { \
.p_proc = NFSPROC4_COMPOUND, \
.p_encode = (kxdreproc_t)nfs4_xdr_##argtype, \
.p_decode = (kxdrdproc_t)nfs4_xdr_##restype, \
.p_arglen = NFS4_##argtype##_sz, \
.p_replen = NFS4_##restype##_sz, \
.p_statidx = NFSPROC4_CLNT_##proc, \
.p_name = #proc, \
}
struct rpc_procinfo nfs4_procedures[] = {
PROC(READ, enc_read, dec_read),
PROC(WRITE, enc_write, dec_write),
PROC(COMMIT, enc_commit, dec_commit),
PROC(OPEN, enc_open, dec_open),
PROC(OPEN_CONFIRM, enc_open_confirm, dec_open_confirm),
PROC(OPEN_NOATTR, enc_open_noattr, dec_open_noattr),
PROC(OPEN_DOWNGRADE, enc_open_downgrade, dec_open_downgrade),
PROC(CLOSE, enc_close, dec_close),
PROC(SETATTR, enc_setattr, dec_setattr),
PROC(FSINFO, enc_fsinfo, dec_fsinfo),
PROC(RENEW, enc_renew, dec_renew),
PROC(SETCLIENTID, enc_setclientid, dec_setclientid),
PROC(SETCLIENTID_CONFIRM, enc_setclientid_confirm, dec_setclientid_confirm),
PROC(LOCK, enc_lock, dec_lock),
PROC(LOCKT, enc_lockt, dec_lockt),
PROC(LOCKU, enc_locku, dec_locku),
PROC(ACCESS, enc_access, dec_access),
PROC(GETATTR, enc_getattr, dec_getattr),
PROC(LOOKUP, enc_lookup, dec_lookup),
PROC(LOOKUP_ROOT, enc_lookup_root, dec_lookup_root),
PROC(REMOVE, enc_remove, dec_remove),
PROC(RENAME, enc_rename, dec_rename),
PROC(LINK, enc_link, dec_link),
PROC(SYMLINK, enc_symlink, dec_symlink),
PROC(CREATE, enc_create, dec_create),
PROC(PATHCONF, enc_pathconf, dec_pathconf),
PROC(STATFS, enc_statfs, dec_statfs),
PROC(READLINK, enc_readlink, dec_readlink),
PROC(READDIR, enc_readdir, dec_readdir),
PROC(SERVER_CAPS, enc_server_caps, dec_server_caps),
PROC(DELEGRETURN, enc_delegreturn, dec_delegreturn),
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),
PROC(SECINFO, enc_secinfo, dec_secinfo),
#if defined(CONFIG_NFS_V4_1)
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),
PROC(LAYOUTCOMMIT, enc_layoutcommit, dec_layoutcommit),
PROC(LAYOUTRETURN, enc_layoutreturn, dec_layoutreturn),
PROC(SECINFO_NO_NAME, enc_secinfo_no_name, dec_secinfo_no_name),
PROC(TEST_STATEID, enc_test_stateid, dec_test_stateid),
PROC(FREE_STATEID, enc_free_stateid, dec_free_stateid),
PROC(GETDEVICELIST, enc_getdevicelist, dec_getdevicelist),
#endif /* CONFIG_NFS_V4_1 */
};
const struct rpc_version nfs_version4 = {
.number = 4,
.nrprocs = ARRAY_SIZE(nfs4_procedures),
.procs = nfs4_procedures
};
/*
* Local variables:
* c-basic-offset: 8
* End:
*/
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