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Diffstat (limited to 'fs/nfs/nfs4xdr.c')
| -rw-r--r-- | fs/nfs/nfs4xdr.c | 7721 |
1 files changed, 7721 insertions, 0 deletions
diff --git a/fs/nfs/nfs4xdr.c b/fs/nfs/nfs4xdr.c new file mode 100644 index 000000000..deec76cf5 --- /dev/null +++ b/fs/nfs/nfs4xdr.c @@ -0,0 +1,7721 @@ +/* + * 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 "nfs4_fs.h" +#include "nfs4trace.h" +#include "internal.h" +#include "nfs4idmap.h" +#include "nfs4session.h" +#include "pnfs.h" +#include "netns.h" + +#define NFSDBG_FACILITY NFSDBG_XDR + +/* Mapping from NFS error code to "errno" error code. */ +#define errno_NFSERR_IO EIO + +struct compound_hdr; +static int nfs4_stat_to_errno(int); +static void encode_layoutget(struct xdr_stream *xdr, + const struct nfs4_layoutget_args *args, + struct compound_hdr *hdr); +static int decode_layoutget(struct xdr_stream *xdr, struct rpc_rqst *req, + struct nfs4_layoutget_res *res); + +/* 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 pagepad_maxsz (1) +#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 nfstime4_maxsz (3) +#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)) +#ifdef CONFIG_NFS_V4_SECURITY_LABEL +/* PI(4 bytes) + LFS(4 bytes) + 1(for null terminator?) + MAXLABELLEN */ +#define nfs4_label_maxsz (4 + 4 + 1 + XDR_QUADLEN(NFS4_MAXLABELLEN)) +#else +#define nfs4_label_maxsz 0 +#endif +/* We support only one layout type per file system */ +#define decode_mdsthreshold_maxsz (1 + 1 + nfs4_fattr_bitmap_maxsz + 1 + 8) +/* 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*nfstime4_maxsz + \ + nfs4_owner_maxsz + \ + nfs4_group_maxsz + nfs4_label_maxsz + \ + decode_mdsthreshold_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 + \ + nfs4_label_maxsz + \ + 1 + nfstime4_maxsz + \ + 1 + nfstime4_maxsz) +#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 + 1 + \ + 1 /* lease time */ + \ + 2 /* max filesize */ + \ + 2 /* max read */ + \ + 2 /* max write */ + \ + nfstime4_maxsz /* time delta */ + \ + 5 /* fs layout types */ + \ + 1 /* layout blksize */ + \ + 1 /* clone blksize */ + \ + 1 /* change attr type */ + \ + 1 /* xattr support */) +#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) + \ + /* client name */ \ + 1 + XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + \ + 1 /* sc_prog */ + \ + 1 + XDR_QUADLEN(RPCBIND_MAXNETIDLEN) + \ + 1 + XDR_QUADLEN(RPCBIND_MAXUADDRLEN) + \ + 1) /* sc_cb_ident */ +#define decode_setclientid_maxsz \ + (op_decode_hdr_maxsz + \ + 2 /* clientid */ + \ + XDR_QUADLEN(NFS4_VERIFIER_SIZE) + \ + 1 + XDR_QUADLEN(RPCBIND_MAXNETIDLEN) + \ + 1 + XDR_QUADLEN(RPCBIND_MAXUADDRLEN)) +#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_lookupp_maxsz (op_encode_hdr_maxsz) +#define decode_lookupp_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_space_limit_maxsz (3) +#define decode_ace_maxsz (3 + nfs4_owner_maxsz) +#define decode_delegation_maxsz (1 + decode_stateid_maxsz + 1 + \ + decode_space_limit_maxsz + \ + 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 + pagepad_maxsz) +#define encode_readdir_maxsz (op_encode_hdr_maxsz + \ + 2 + encode_verifier_maxsz + 5 + \ + nfs4_label_maxsz) +#define decode_readdir_maxsz (op_decode_hdr_maxsz + \ + decode_verifier_maxsz + pagepad_maxsz) +#define encode_readlink_maxsz (op_encode_hdr_maxsz) +#define decode_readlink_maxsz (op_decode_hdr_maxsz + 1 + pagepad_maxsz) +#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 + pagepad_maxsz) +#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 \ + (pagepad_maxsz) +#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 IMPL_NAME_LIMIT (sizeof(utsname()->sysname) + sizeof(utsname()->release) + \ + sizeof(utsname()->version) + sizeof(utsname()->machine) + 8) + +#define encode_exchange_id_maxsz (op_encode_hdr_maxsz + \ + encode_verifier_maxsz + \ + 1 /* co_ownerid.len */ + \ + /* eia_clientowner */ \ + 1 + XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + \ + 1 /* flags */ + \ + 1 /* spa_how */ + \ + /* max is SP4_MACH_CRED (for now) */ + \ + 1 + NFS4_OP_MAP_NUM_WORDS + \ + 1 + NFS4_OP_MAP_NUM_WORDS + \ + 1 /* implementation id array of size 1 */ + \ + 1 /* nii_domain */ + \ + XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + \ + 1 /* nii_name */ + \ + XDR_QUADLEN(IMPL_NAME_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 */ + \ + /* max is SP4_MACH_CRED (for now) */ + \ + 1 + NFS4_OP_MAP_NUM_WORDS + \ + 1 + NFS4_OP_MAP_NUM_WORDS + \ + 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_bind_conn_to_session_maxsz (op_encode_hdr_maxsz + \ + /* bctsa_sessid */ \ + XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \ + 1 /* bctsa_dir */ + \ + 1 /* bctsa_use_conn_in_rdma_mode */) +#define decode_bind_conn_to_session_maxsz (op_decode_hdr_maxsz + \ + /* bctsr_sessid */ \ + XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \ + 1 /* bctsr_dir */ + \ + 1 /* bctsr_use_conn_in_rdma_mode */) +#define encode_destroy_session_maxsz (op_encode_hdr_maxsz + 4) +#define decode_destroy_session_maxsz (op_decode_hdr_maxsz) +#define encode_destroy_clientid_maxsz (op_encode_hdr_maxsz + 2) +#define decode_destroy_clientid_maxsz (op_decode_hdr_maxsz) +#define encode_sequence_maxsz (op_encode_hdr_maxsz + \ + XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + 4) +#define decode_sequence_maxsz (op_decode_hdr_maxsz + \ + XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + 5) +#define encode_reclaim_complete_maxsz (op_encode_hdr_maxsz + 4) +#define decode_reclaim_complete_maxsz (op_decode_hdr_maxsz + 4) +#define encode_getdeviceinfo_maxsz (op_encode_hdr_maxsz + \ + XDR_QUADLEN(NFS4_DEVICEID4_SIZE) + \ + 1 /* layout type */ + \ + 1 /* maxcount */ + \ + 1 /* bitmap size */ + \ + 1 /* notification bitmap length */ + \ + 1 /* notification bitmap, word 0 */) +#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, word 0 */ + \ + pagepad_maxsz /* possible XDR padding */) +#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) + \ + pagepad_maxsz) +#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 /* layoutupdate4 opaqueue len */) + /* the actual content of layoutupdate4 should + be allocated by drivers and spliced in + using xdr_write_pages */ +#define decode_layoutcommit_maxsz (op_decode_hdr_maxsz + 3) +#define encode_layoutreturn_maxsz (8 + op_encode_hdr_maxsz + \ + encode_stateid_maxsz + \ + 1 + \ + XDR_QUADLEN(NFS4_OPAQUE_LIMIT)) +#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) +#else /* CONFIG_NFS_V4_1 */ +#define encode_sequence_maxsz 0 +#define decode_sequence_maxsz 0 +#define encode_layoutreturn_maxsz 0 +#define decode_layoutreturn_maxsz 0 +#define encode_layoutget_maxsz 0 +#define decode_layoutget_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) +#define NFS4_dec_commit_sz (compound_decode_hdr_maxsz + \ + decode_sequence_maxsz + \ + decode_putfh_maxsz + \ + decode_commit_maxsz) +#define NFS4_enc_open_sz (compound_encode_hdr_maxsz + \ + encode_sequence_maxsz + \ + encode_putfh_maxsz + \ + encode_open_maxsz + \ + encode_access_maxsz + \ + encode_getfh_maxsz + \ + encode_getattr_maxsz + \ + encode_layoutget_maxsz) +#define NFS4_dec_open_sz (compound_decode_hdr_maxsz + \ + decode_sequence_maxsz + \ + decode_putfh_maxsz + \ + decode_open_maxsz + \ + decode_access_maxsz + \ + decode_getfh_maxsz + \ + decode_getattr_maxsz + \ + decode_layoutget_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_access_maxsz + \ + encode_getattr_maxsz + \ + encode_layoutget_maxsz) +#define NFS4_dec_open_noattr_sz (compound_decode_hdr_maxsz + \ + decode_sequence_maxsz + \ + decode_putfh_maxsz + \ + decode_open_maxsz + \ + decode_access_maxsz + \ + decode_getattr_maxsz + \ + decode_layoutget_maxsz) +#define NFS4_enc_open_downgrade_sz \ + (compound_encode_hdr_maxsz + \ + encode_sequence_maxsz + \ + encode_putfh_maxsz + \ + encode_layoutreturn_maxsz + \ + encode_open_downgrade_maxsz) +#define NFS4_dec_open_downgrade_sz \ + (compound_decode_hdr_maxsz + \ + decode_sequence_maxsz + \ + decode_putfh_maxsz + \ + decode_layoutreturn_maxsz + \ + decode_open_downgrade_maxsz) +#define NFS4_enc_close_sz (compound_encode_hdr_maxsz + \ + encode_sequence_maxsz + \ + encode_putfh_maxsz + \ + encode_layoutreturn_maxsz + \ + encode_close_maxsz + \ + encode_getattr_maxsz) +#define NFS4_dec_close_sz (compound_decode_hdr_maxsz + \ + decode_sequence_maxsz + \ + decode_putfh_maxsz + \ + decode_layoutreturn_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) +#define NFS4_dec_setclientid_confirm_sz \ + (compound_decode_hdr_maxsz + \ + decode_setclientid_confirm_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 + \ + encode_renew_maxsz) +#define NFS4_dec_getattr_sz (compound_decode_hdr_maxsz + \ + decode_sequence_maxsz + \ + decode_putfh_maxsz + \ + decode_getattr_maxsz + \ + decode_renew_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_lookupp_sz (compound_encode_hdr_maxsz + \ + encode_sequence_maxsz + \ + encode_putfh_maxsz + \ + encode_lookupp_maxsz + \ + encode_getattr_maxsz + \ + encode_getfh_maxsz) +#define NFS4_dec_lookupp_sz (compound_decode_hdr_maxsz + \ + decode_sequence_maxsz + \ + decode_putfh_maxsz + \ + decode_lookupp_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) +#define NFS4_dec_remove_sz (compound_decode_hdr_maxsz + \ + decode_sequence_maxsz + \ + decode_putfh_maxsz + \ + decode_remove_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) +#define NFS4_dec_rename_sz (compound_decode_hdr_maxsz + \ + decode_sequence_maxsz + \ + decode_putfh_maxsz + \ + decode_savefh_maxsz + \ + decode_putfh_maxsz + \ + decode_rename_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 + \ + encode_restorefh_maxsz + \ + encode_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_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_create_maxsz + \ + encode_getfh_maxsz + \ + encode_getattr_maxsz) +#define NFS4_dec_create_sz (compound_decode_hdr_maxsz + \ + decode_sequence_maxsz + \ + decode_putfh_maxsz + \ + decode_create_maxsz + \ + decode_getfh_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_layoutreturn_maxsz + \ + encode_delegreturn_maxsz + \ + encode_getattr_maxsz) +#define NFS4_dec_delegreturn_sz (compound_decode_hdr_maxsz + \ + decode_sequence_maxsz + \ + decode_putfh_maxsz + \ + decode_layoutreturn_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 + \ + encode_renew_maxsz) +#define NFS4_dec_fs_locations_sz \ + (compound_decode_hdr_maxsz + \ + decode_sequence_maxsz + \ + decode_putfh_maxsz + \ + decode_lookup_maxsz + \ + decode_fs_locations_maxsz + \ + decode_renew_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) +#define NFS4_enc_fsid_present_sz \ + (compound_encode_hdr_maxsz + \ + encode_sequence_maxsz + \ + encode_putfh_maxsz + \ + encode_getfh_maxsz + \ + encode_renew_maxsz) +#define NFS4_dec_fsid_present_sz \ + (compound_decode_hdr_maxsz + \ + decode_sequence_maxsz + \ + decode_putfh_maxsz + \ + decode_getfh_maxsz + \ + decode_renew_maxsz) +#if defined(CONFIG_NFS_V4_1) +#define NFS4_enc_bind_conn_to_session_sz \ + (compound_encode_hdr_maxsz + \ + encode_bind_conn_to_session_maxsz) +#define NFS4_dec_bind_conn_to_session_sz \ + (compound_decode_hdr_maxsz + \ + decode_bind_conn_to_session_maxsz) +#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_destroy_clientid_sz (compound_encode_hdr_maxsz + \ + encode_destroy_clientid_maxsz) +#define NFS4_dec_destroy_clientid_sz (compound_decode_hdr_maxsz + \ + decode_destroy_clientid_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) +#endif +#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) +#if defined(CONFIG_NFS_V4_1) +#define NFS4_enc_reclaim_complete_sz (compound_encode_hdr_maxsz + \ + encode_sequence_maxsz + \ + encode_reclaim_complete_maxsz) +#define NFS4_dec_reclaim_complete_sz (compound_decode_hdr_maxsz + \ + decode_sequence_maxsz + \ + decode_reclaim_complete_maxsz) +#define NFS4_enc_getdeviceinfo_sz (compound_encode_hdr_maxsz + \ + encode_sequence_maxsz +\ + encode_getdeviceinfo_maxsz) +#define NFS4_dec_getdeviceinfo_sz (compound_decode_hdr_maxsz + \ + decode_sequence_maxsz + \ + decode_getdeviceinfo_maxsz) +#define NFS4_enc_layoutget_sz (compound_encode_hdr_maxsz + \ + encode_sequence_maxsz + \ + encode_putfh_maxsz + \ + encode_layoutget_maxsz) +#define NFS4_dec_layoutget_sz (compound_decode_hdr_maxsz + \ + decode_sequence_maxsz + \ + decode_putfh_maxsz + \ + decode_layoutget_maxsz) +#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); + +const u32 nfs41_maxgetdevinfo_overhead = ((RPC_MAX_REPHEADER_WITH_AUTH + + compound_decode_hdr_maxsz + + decode_sequence_maxsz) * + XDR_UNIT); +EXPORT_SYMBOL_GPL(nfs41_maxgetdevinfo_overhead); +#endif /* CONFIG_NFS_V4_1 */ + +static const umode_t nfs_type2fmt[] = { + [NF4BAD] = 0, + [NF4REG] = S_IFREG, + [NF4DIR] = S_IFDIR, + [NF4BLK] = S_IFBLK, + [NF4CHR] = S_IFCHR, + [NF4LNK] = S_IFLNK, + [NF4SOCK] = S_IFSOCK, + [NF4FIFO] = S_IFIFO, + [NF4ATTRDIR] = 0, + [NF4NAMEDATTR] = 0, +}; + +struct compound_hdr { + int32_t status; + uint32_t nops; + __be32 * nops_p; + uint32_t taglen; + char * tag; + uint32_t replen; /* expected reply words */ + u32 minorversion; +}; + +static __be32 *reserve_space(struct xdr_stream *xdr, size_t nbytes) +{ + __be32 *p = xdr_reserve_space(xdr, nbytes); + BUG_ON(!p); + return p; +} + +static void encode_opaque_fixed(struct xdr_stream *xdr, const void *buf, size_t len) +{ + WARN_ON_ONCE(xdr_stream_encode_opaque_fixed(xdr, buf, len) < 0); +} + +static void encode_string(struct xdr_stream *xdr, unsigned int len, const char *str) +{ + WARN_ON_ONCE(xdr_stream_encode_opaque(xdr, str, len) < 0); +} + +static void encode_uint32(struct xdr_stream *xdr, u32 n) +{ + WARN_ON_ONCE(xdr_stream_encode_u32(xdr, n) < 0); +} + +static void encode_uint64(struct xdr_stream *xdr, u64 n) +{ + WARN_ON_ONCE(xdr_stream_encode_u64(xdr, n) < 0); +} + +static ssize_t xdr_encode_bitmap4(struct xdr_stream *xdr, + const __u32 *bitmap, size_t len) +{ + ssize_t ret; + + /* Trim empty words */ + while (len > 0 && bitmap[len-1] == 0) + len--; + ret = xdr_stream_encode_uint32_array(xdr, bitmap, len); + if (WARN_ON_ONCE(ret < 0)) + return ret; + return len; +} + +static size_t mask_bitmap4(const __u32 *bitmap, const __u32 *mask, + __u32 *res, size_t len) +{ + size_t i; + __u32 tmp; + + while (len > 0 && (bitmap[len-1] == 0 || mask[len-1] == 0)) + len--; + for (i = len; i-- > 0;) { + tmp = bitmap[i] & mask[i]; + res[i] = tmp; + } + return len; +} + +static void encode_nfs4_seqid(struct xdr_stream *xdr, + const struct nfs_seqid *seqid) +{ + if (seqid != NULL) + encode_uint32(xdr, seqid->sequence->counter); + else + encode_uint32(xdr, 0); +} + +static void encode_compound_hdr(struct xdr_stream *xdr, + struct rpc_rqst *req, + struct compound_hdr *hdr) +{ + __be32 *p; + + /* 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 = 3 + hdr->taglen; + + WARN_ON_ONCE(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) +{ + WARN_ON_ONCE(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 __be32 * +xdr_encode_nfstime4(__be32 *p, const struct timespec64 *t) +{ + p = xdr_encode_hyper(p, t->tv_sec); + *p++ = cpu_to_be32(t->tv_nsec); + return p; +} + +static void encode_attrs(struct xdr_stream *xdr, const struct iattr *iap, + const struct nfs4_label *label, + const umode_t *umask, + const struct nfs_server *server, + const uint32_t attrmask[]) +{ + char owner_name[IDMAP_NAMESZ]; + char owner_group[IDMAP_NAMESZ]; + int owner_namelen = 0; + int owner_grouplen = 0; + __be32 *p; + uint32_t len = 0; + uint32_t bmval[3] = { 0 }; + + /* + * We reserve enough space to write the entire attribute buffer at once. + */ + if ((iap->ia_valid & ATTR_SIZE) && (attrmask[0] & FATTR4_WORD0_SIZE)) { + bmval[0] |= FATTR4_WORD0_SIZE; + len += 8; + } + if (iap->ia_valid & ATTR_MODE) { + if (umask && (attrmask[2] & FATTR4_WORD2_MODE_UMASK)) { + bmval[2] |= FATTR4_WORD2_MODE_UMASK; + len += 8; + } else if (attrmask[1] & FATTR4_WORD1_MODE) { + bmval[1] |= FATTR4_WORD1_MODE; + len += 4; + } + } + if ((iap->ia_valid & ATTR_UID) && (attrmask[1] & FATTR4_WORD1_OWNER)) { + 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", + from_kuid(&init_user_ns, iap->ia_uid)); + /* XXX */ + strcpy(owner_name, "nobody"); + owner_namelen = sizeof("nobody") - 1; + /* goto out; */ + } + bmval[1] |= FATTR4_WORD1_OWNER; + len += 4 + (XDR_QUADLEN(owner_namelen) << 2); + } + if ((iap->ia_valid & ATTR_GID) && + (attrmask[1] & FATTR4_WORD1_OWNER_GROUP)) { + 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", + from_kgid(&init_user_ns, iap->ia_gid)); + strcpy(owner_group, "nobody"); + owner_grouplen = sizeof("nobody") - 1; + /* goto out; */ + } + bmval[1] |= FATTR4_WORD1_OWNER_GROUP; + len += 4 + (XDR_QUADLEN(owner_grouplen) << 2); + } + if (attrmask[1] & FATTR4_WORD1_TIME_ACCESS_SET) { + if (iap->ia_valid & ATTR_ATIME_SET) { + bmval[1] |= FATTR4_WORD1_TIME_ACCESS_SET; + len += 4 + (nfstime4_maxsz << 2); + } else if (iap->ia_valid & ATTR_ATIME) { + bmval[1] |= FATTR4_WORD1_TIME_ACCESS_SET; + len += 4; + } + } + if (attrmask[1] & FATTR4_WORD1_TIME_MODIFY_SET) { + if (iap->ia_valid & ATTR_MTIME_SET) { + bmval[1] |= FATTR4_WORD1_TIME_MODIFY_SET; + len += 4 + (nfstime4_maxsz << 2); + } else if (iap->ia_valid & ATTR_MTIME) { + bmval[1] |= FATTR4_WORD1_TIME_MODIFY_SET; + len += 4; + } + } + + if (label && (attrmask[2] & FATTR4_WORD2_SECURITY_LABEL)) { + len += 4 + 4 + 4 + (XDR_QUADLEN(label->len) << 2); + bmval[2] |= FATTR4_WORD2_SECURITY_LABEL; + } + + xdr_encode_bitmap4(xdr, bmval, ARRAY_SIZE(bmval)); + xdr_stream_encode_opaque_inline(xdr, (void **)&p, len); + + if (bmval[0] & FATTR4_WORD0_SIZE) + p = xdr_encode_hyper(p, iap->ia_size); + if (bmval[1] & FATTR4_WORD1_MODE) + *p++ = cpu_to_be32(iap->ia_mode & S_IALLUGO); + if (bmval[1] & FATTR4_WORD1_OWNER) + p = xdr_encode_opaque(p, owner_name, owner_namelen); + if (bmval[1] & FATTR4_WORD1_OWNER_GROUP) + p = xdr_encode_opaque(p, owner_group, owner_grouplen); + if (bmval[1] & FATTR4_WORD1_TIME_ACCESS_SET) { + if (iap->ia_valid & ATTR_ATIME_SET) { + *p++ = cpu_to_be32(NFS4_SET_TO_CLIENT_TIME); + p = xdr_encode_nfstime4(p, &iap->ia_atime); + } else + *p++ = cpu_to_be32(NFS4_SET_TO_SERVER_TIME); + } + if (bmval[1] & FATTR4_WORD1_TIME_MODIFY_SET) { + if (iap->ia_valid & ATTR_MTIME_SET) { + *p++ = cpu_to_be32(NFS4_SET_TO_CLIENT_TIME); + p = xdr_encode_nfstime4(p, &iap->ia_mtime); + } else + *p++ = cpu_to_be32(NFS4_SET_TO_SERVER_TIME); + } + if (label && (bmval[2] & FATTR4_WORD2_SECURITY_LABEL)) { + *p++ = cpu_to_be32(label->lfs); + *p++ = cpu_to_be32(label->pi); + *p++ = cpu_to_be32(label->len); + p = xdr_encode_opaque_fixed(p, label->label, label->len); + } + if (bmval[2] & FATTR4_WORD2_MODE_UMASK) { + *p++ = cpu_to_be32(iap->ia_mode & S_IALLUGO); + *p++ = cpu_to_be32(*umask); + } + +/* 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_commitargs *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); + xdr->buf->flags |= XDRBUF_WRITE; + 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->label, &create->umask, + create->server, create->server->attr_bitmask); +} + +static void encode_getattr(struct xdr_stream *xdr, + const __u32 *bitmap, const __u32 *mask, size_t len, + struct compound_hdr *hdr) +{ + __u32 masked_bitmap[nfs4_fattr_bitmap_maxsz]; + + encode_op_hdr(xdr, OP_GETATTR, decode_getattr_maxsz, hdr); + if (mask) { + if (WARN_ON_ONCE(len > ARRAY_SIZE(masked_bitmap))) + len = ARRAY_SIZE(masked_bitmap); + len = mask_bitmap4(bitmap, mask, masked_bitmap, len); + bitmap = masked_bitmap; + } + xdr_encode_bitmap4(xdr, bitmap, len); +} + +static void encode_getfattr(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr) +{ + encode_getattr(xdr, nfs4_fattr_bitmap, bitmask, + ARRAY_SIZE(nfs4_fattr_bitmap), hdr); +} + +static void encode_getfattr_open(struct xdr_stream *xdr, const u32 *bitmask, + const u32 *open_bitmap, + struct compound_hdr *hdr) +{ + encode_getattr(xdr, open_bitmap, bitmask, 3, hdr); +} + +static void encode_fsinfo(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr) +{ + encode_getattr(xdr, nfs4_fsinfo_bitmap, bitmask, + ARRAY_SIZE(nfs4_fsinfo_bitmap), hdr); +} + +static void encode_fs_locations(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr) +{ + encode_getattr(xdr, nfs4_fs_locations_bitmap, bitmask, + ARRAY_SIZE(nfs4_fs_locations_bitmap), 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) + 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_lookupp(struct xdr_stream *xdr, struct compound_hdr *hdr) +{ + encode_op_hdr(xdr, OP_LOOKUPP, decode_lookupp_maxsz, hdr); +} + +static void encode_share_access(struct xdr_stream *xdr, u32 share_access) +{ + __be32 *p; + + p = reserve_space(xdr, 8); + *p++ = cpu_to_be32(share_access); + *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->share_access); + 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; + + p = reserve_space(xdr, 4); + switch(arg->createmode) { + case NFS4_CREATE_UNCHECKED: + *p = cpu_to_be32(NFS4_CREATE_UNCHECKED); + encode_attrs(xdr, arg->u.attrs, arg->label, &arg->umask, + arg->server, arg->server->attr_bitmask); + break; + case NFS4_CREATE_GUARDED: + *p = cpu_to_be32(NFS4_CREATE_GUARDED); + encode_attrs(xdr, arg->u.attrs, arg->label, &arg->umask, + arg->server, arg->server->attr_bitmask); + break; + case NFS4_CREATE_EXCLUSIVE: + *p = cpu_to_be32(NFS4_CREATE_EXCLUSIVE); + encode_nfs4_verifier(xdr, &arg->u.verifier); + break; + case NFS4_CREATE_EXCLUSIVE4_1: + *p = cpu_to_be32(NFS4_CREATE_EXCLUSIVE4_1); + encode_nfs4_verifier(xdr, &arg->u.verifier); + encode_attrs(xdr, arg->u.attrs, arg->label, &arg->umask, + arg->server, arg->server->exclcreat_bitmask); + } +} + +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: + *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 inline void encode_claim_fh(struct xdr_stream *xdr) +{ + __be32 *p; + + p = reserve_space(xdr, 4); + *p = cpu_to_be32(NFS4_OPEN_CLAIM_FH); +} + +static inline void encode_claim_delegate_cur_fh(struct xdr_stream *xdr, const nfs4_stateid *stateid) +{ + __be32 *p; + + p = reserve_space(xdr, 4); + *p = cpu_to_be32(NFS4_OPEN_CLAIM_DELEG_CUR_FH); + encode_nfs4_stateid(xdr, stateid); +} + +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; + case NFS4_OPEN_CLAIM_FH: + encode_claim_fh(xdr); + break; + case NFS4_OPEN_CLAIM_DELEG_CUR_FH: + encode_claim_delegate_cur_fh(xdr, &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->share_access); +} + +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_read(struct xdr_stream *xdr, const struct nfs_pgio_args *args, + struct compound_hdr *hdr) +{ + __be32 *p; + + encode_op_hdr(xdr, OP_READ, decode_read_maxsz, hdr); + encode_nfs4_stateid(xdr, &args->stateid); + + 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[3] = { + FATTR4_WORD0_RDATTR_ERROR, + FATTR4_WORD1_MOUNTED_ON_FILEID, + }; + uint32_t dircount = readdir->count; + uint32_t maxcount = readdir->count; + __be32 *p, verf[2]; + uint32_t attrlen = 0; + unsigned int i; + + 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; + attrs[2] |= FATTR4_WORD2_SECURITY_LABEL; + } + /* Use mounted_on_fileid only if the server supports it */ + if (!(readdir->bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)) + attrs[0] |= FATTR4_WORD0_FILEID; + for (i = 0; i < ARRAY_SIZE(attrs); i++) { + attrs[i] &= readdir->bitmask[i]; + if (attrs[i] != 0) + attrlen = i+1; + } + + 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, 12 + (attrlen << 2)); + *p++ = cpu_to_be32(dircount); + *p++ = cpu_to_be32(maxcount); + *p++ = cpu_to_be32(attrlen); + for (i = 0; i < attrlen; i++) + *p++ = cpu_to_be32(attrs[i]); + memcpy(verf, readdir->verifier.data, sizeof(verf)); + + dprintk("%s: cookie = %llu, verifier = %08x:%08x, bitmap = %08x:%08x:%08x\n", + __func__, + (unsigned long long)readdir->cookie, + verf[0], verf[1], + attrs[0] & readdir->bitmask[0], + attrs[1] & readdir->bitmask[1], + attrs[2] & readdir->bitmask[2]); +} + +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 nfs4_acltype_to_bitmap(enum nfs4_acl_type type, __u32 bitmap[2]) +{ + switch (type) { + default: + bitmap[0] = FATTR4_WORD0_ACL; + bitmap[1] = 0; + break; + case NFS4ACL_DACL: + bitmap[0] = 0; + bitmap[1] = FATTR4_WORD1_DACL; + break; + case NFS4ACL_SACL: + bitmap[0] = 0; + bitmap[1] = FATTR4_WORD1_SACL; + } +} + +static void encode_setacl(struct xdr_stream *xdr, + const struct nfs_setaclargs *arg, + struct compound_hdr *hdr) +{ + __u32 bitmap[2]; + + nfs4_acltype_to_bitmap(arg->acl_type, bitmap); + + encode_op_hdr(xdr, OP_SETATTR, decode_setacl_maxsz, hdr); + encode_nfs4_stateid(xdr, &zero_stateid); + xdr_encode_bitmap4(xdr, bitmap, ARRAY_SIZE(bitmap)); + encode_uint32(xdr, arg->acl_len); + xdr_write_pages(xdr, arg->acl_pages, 0, 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, arg->label, NULL, server, + server->attr_bitmask); +} + +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, strlen(setclientid->sc_clnt->cl_owner_id), + setclientid->sc_clnt->cl_owner_id); + 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_clnt->cl_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_pgio_args *args, + struct compound_hdr *hdr) +{ + __be32 *p; + + encode_op_hdr(xdr, OP_WRITE, decode_write_maxsz, hdr); + encode_nfs4_stateid(xdr, &args->stateid); + + 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_bind_conn_to_session(struct xdr_stream *xdr, + const struct nfs41_bind_conn_to_session_args *args, + struct compound_hdr *hdr) +{ + __be32 *p; + + encode_op_hdr(xdr, OP_BIND_CONN_TO_SESSION, + decode_bind_conn_to_session_maxsz, hdr); + encode_opaque_fixed(xdr, args->sessionid.data, NFS4_MAX_SESSIONID_LEN); + p = xdr_reserve_space(xdr, 8); + *p++ = cpu_to_be32(args->dir); + *p = (args->use_conn_in_rdma_mode) ? cpu_to_be32(1) : cpu_to_be32(0); +} + +static void encode_op_map(struct xdr_stream *xdr, const struct nfs4_op_map *op_map) +{ + unsigned int i; + encode_uint32(xdr, NFS4_OP_MAP_NUM_WORDS); + for (i = 0; i < NFS4_OP_MAP_NUM_WORDS; i++) + encode_uint32(xdr, op_map->u.words[i]); +} + +static void encode_exchange_id(struct xdr_stream *xdr, + const struct nfs41_exchange_id_args *args, + struct compound_hdr *hdr) +{ + __be32 *p; + char impl_name[IMPL_NAME_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, strlen(args->client->cl_owner_id), + args->client->cl_owner_id); + + encode_uint32(xdr, args->flags); + encode_uint32(xdr, args->state_protect.how); + + switch (args->state_protect.how) { + case SP4_NONE: + break; + case SP4_MACH_CRED: + encode_op_map(xdr, &args->state_protect.enforce); + encode_op_map(xdr, &args->state_protect.allow); + break; + default: + WARN_ON_ONCE(1); + break; + } + + if (send_implementation_id && + sizeof(CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN) > 1 && + sizeof(CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN) + <= sizeof(impl_name) + 1) + len = snprintf(impl_name, sizeof(impl_name), "%s %s %s %s", + utsname()->sysname, utsname()->release, + utsname()->version, utsname()->machine); + + if (len > 0) { + encode_uint32(xdr, 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 + encode_uint32(xdr, 0); /* implementation id array length=0 */ +} + +static void encode_create_session(struct xdr_stream *xdr, + const struct nfs41_create_session_args *args, + struct compound_hdr *hdr) +{ + __be32 *p; + struct nfs_client *clp = args->client; + struct rpc_clnt *clnt = clp->cl_rpcclient; + struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id); + 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 + 2) + * XDR_UNIT + RPC_MAX_AUTH_SIZE; + + encode_op_hdr(xdr, OP_CREATE_SESSION, decode_create_session_maxsz, hdr); + p = reserve_space(xdr, 16 + 2*28 + 20 + clnt->cl_nodelen + 12); + p = xdr_encode_hyper(p, args->clientid); + *p++ = cpu_to_be32(args->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(ktime_to_ns(nn->boot_time)); /* stamp */ + p = xdr_encode_array(p, clnt->cl_nodename, clnt->cl_nodelen); + *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, + const 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_destroy_clientid(struct xdr_stream *xdr, + uint64_t clientid, + struct compound_hdr *hdr) +{ + encode_op_hdr(xdr, OP_DESTROY_CLIENTID, decode_destroy_clientid_maxsz, hdr); + encode_uint64(xdr, clientid); +} + +static void encode_reclaim_complete(struct xdr_stream *xdr, + const 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; + struct nfs4_slot_table *tp; + struct nfs4_slot *slot = args->sa_slot; + __be32 *p; + + tp = slot->table; + session = tp->session; + if (!session) + return; + + 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, slot->slot_nr, + 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(slot->slot_nr); + *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_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, NFS4_DEVICEID4_SIZE + 4 + 4); + 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->maxcount); /* gdia_maxcount */ + + p = reserve_space(xdr, 4 + 4); + *p++ = cpu_to_be32(1); /* bitmap length */ + *p++ = cpu_to_be32(args->notify_types); +} + +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); + if (args->lastbytewritten != U64_MAX) { + p = reserve_space(xdr, 20); + *p++ = cpu_to_be32(1); /* newoffset = TRUE */ + p = xdr_encode_hyper(p, args->lastbytewritten); + } else { + p = reserve_space(xdr, 12); + *p++ = cpu_to_be32(0); /* newoffset = FALSE */ + } + *p++ = cpu_to_be32(0); /* Never send time_modify_changed */ + *p++ = cpu_to_be32(NFS_SERVER(args->inode)->pnfs_curr_ld->id);/* type */ + + encode_uint32(xdr, args->layoutupdate_len); + if (args->layoutupdate_pages) + xdr_write_pages(xdr, args->layoutupdate_pages, 0, + args->layoutupdate_len); + + 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(args->range.iomode); + *p = cpu_to_be32(RETURN_FILE); + p = reserve_space(xdr, 16); + p = xdr_encode_hyper(p, args->range.offset); + p = xdr_encode_hyper(p, args->range.length); + spin_lock(&args->inode->i_lock); + encode_nfs4_stateid(xdr, &args->stateid); + spin_unlock(&args->inode->i_lock); + if (args->ld_private->ops && args->ld_private->ops->encode) + args->ld_private->ops->encode(xdr, args, args->ld_private); + 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, + const 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, + const 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); +} +#else +static inline void +encode_layoutreturn(struct xdr_stream *xdr, + const struct nfs4_layoutreturn_args *args, + struct compound_hdr *hdr) +{ +} + +static void +encode_layoutget(struct xdr_stream *xdr, + const struct nfs4_layoutget_args *args, + struct compound_hdr *hdr) +{ +} +#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) + struct nfs4_session *session = args->sa_slot->table->session; + if (session) + return 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 void *data) +{ + const struct nfs4_accessargs *args = data; + 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); + if (args->bitmask) + 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 void *data) +{ + const struct nfs4_lookup_arg *args = data; + 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 LOOKUPP request + */ +static void nfs4_xdr_enc_lookupp(struct rpc_rqst *req, struct xdr_stream *xdr, + const void *data) +{ + const struct nfs4_lookupp_arg *args = data; + 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_lookupp(xdr, &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 void *data) +{ + const struct nfs4_lookup_root_arg *args = data; + 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 void *data) +{ + const struct nfs_removeargs *args = data; + 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_nops(&hdr); +} + +/* + * Encode RENAME request + */ +static void nfs4_xdr_enc_rename(struct rpc_rqst *req, struct xdr_stream *xdr, + const void *data) +{ + const struct nfs_renameargs *args = data; + 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_nops(&hdr); +} + +/* + * Encode LINK request + */ +static void nfs4_xdr_enc_link(struct rpc_rqst *req, struct xdr_stream *xdr, + const void *data) +{ + const struct nfs4_link_arg *args = data; + 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_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 void *data) +{ + const struct nfs4_create_arg *args = data; + 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_create(xdr, args, &hdr); + encode_getfh(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 void *data) +{ + const struct nfs4_create_arg *args = data; + + 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 void *data) +{ + const struct nfs4_getattr_arg *args = data; + 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, + const void *data) +{ + const struct nfs_closeargs *args = data; + 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); + if (args->lr_args) + encode_layoutreturn(xdr, args->lr_args, &hdr); + if (args->bitmask != NULL) + encode_getfattr(xdr, args->bitmask, &hdr); + encode_close(xdr, args, &hdr); + encode_nops(&hdr); +} + +/* + * Encode an OPEN request + */ +static void nfs4_xdr_enc_open(struct rpc_rqst *req, struct xdr_stream *xdr, + const void *data) +{ + const struct nfs_openargs *args = data; + 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_getfh(xdr, &hdr); + if (args->access) + encode_access(xdr, args->access, &hdr); + encode_getfattr_open(xdr, args->bitmask, args->open_bitmap, &hdr); + if (args->lg_args) { + encode_layoutget(xdr, args->lg_args, &hdr); + rpc_prepare_reply_pages(req, args->lg_args->layout.pages, 0, + args->lg_args->layout.pglen, + hdr.replen - pagepad_maxsz); + } + encode_nops(&hdr); +} + +/* + * Encode an OPEN_CONFIRM request + */ +static void nfs4_xdr_enc_open_confirm(struct rpc_rqst *req, + struct xdr_stream *xdr, + const void *data) +{ + const struct nfs_open_confirmargs *args = data; + 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, + const void *data) +{ + const struct nfs_openargs *args = data; + 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); + if (args->access) + encode_access(xdr, args->access, &hdr); + encode_getfattr_open(xdr, args->bitmask, args->open_bitmap, &hdr); + if (args->lg_args) { + encode_layoutget(xdr, args->lg_args, &hdr); + rpc_prepare_reply_pages(req, args->lg_args->layout.pages, 0, + args->lg_args->layout.pglen, + hdr.replen - pagepad_maxsz); + } + encode_nops(&hdr); +} + +/* + * Encode an OPEN_DOWNGRADE request + */ +static void nfs4_xdr_enc_open_downgrade(struct rpc_rqst *req, + struct xdr_stream *xdr, + const void *data) +{ + const struct nfs_closeargs *args = data; + 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); + if (args->lr_args) + encode_layoutreturn(xdr, args->lr_args, &hdr); + encode_open_downgrade(xdr, args, &hdr); + encode_nops(&hdr); +} + +/* + * Encode a LOCK request + */ +static void nfs4_xdr_enc_lock(struct rpc_rqst *req, struct xdr_stream *xdr, + const void *data) +{ + const struct nfs_lock_args *args = data; + 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, + const void *data) +{ + const struct nfs_lockt_args *args = data; + 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, + const void *data) +{ + const struct nfs_locku_args *args = data; + 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, + const void *data) +{ + const struct nfs_release_lockowner_args *args = data; + 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 void *data) +{ + const struct nfs4_readlink *args = data; + 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); + + rpc_prepare_reply_pages(req, args->pages, args->pgbase, + args->pglen, hdr.replen - pagepad_maxsz); + encode_nops(&hdr); +} + +/* + * Encode a READDIR request + */ +static void nfs4_xdr_enc_readdir(struct rpc_rqst *req, struct xdr_stream *xdr, + const void *data) +{ + const struct nfs4_readdir_arg *args = data; + 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); + + rpc_prepare_reply_pages(req, args->pages, args->pgbase, + args->count, hdr.replen - pagepad_maxsz); + encode_nops(&hdr); +} + +/* + * Encode a READ request + */ +static void nfs4_xdr_enc_read(struct rpc_rqst *req, struct xdr_stream *xdr, + const void *data) +{ + const struct nfs_pgio_args *args = data; + 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); + + rpc_prepare_reply_pages(req, args->pages, args->pgbase, + args->count, hdr.replen - pagepad_maxsz); + 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, + const void *data) +{ + const struct nfs_setattrargs *args = data; + 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, + const void *data) +{ + const struct nfs_getaclargs *args = data; + struct compound_hdr hdr = { + .minorversion = nfs4_xdr_minorversion(&args->seq_args), + }; + __u32 nfs4_acl_bitmap[2]; + uint32_t replen; + + nfs4_acltype_to_bitmap(args->acl_type, nfs4_acl_bitmap); + + 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; + encode_getattr(xdr, nfs4_acl_bitmap, NULL, + ARRAY_SIZE(nfs4_acl_bitmap), &hdr); + + rpc_prepare_reply_pages(req, args->acl_pages, 0, + args->acl_len, replen); + encode_nops(&hdr); +} + +/* + * Encode a WRITE request + */ +static void nfs4_xdr_enc_write(struct rpc_rqst *req, struct xdr_stream *xdr, + const void *data) +{ + const struct nfs_pgio_args *args = data; + 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, + const void *data) +{ + const struct nfs_commitargs *args = data; + 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); + encode_nops(&hdr); +} + +/* + * FSINFO request + */ +static void nfs4_xdr_enc_fsinfo(struct rpc_rqst *req, struct xdr_stream *xdr, + const void *data) +{ + const struct nfs4_fsinfo_arg *args = data; + 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 void *data) +{ + const struct nfs4_pathconf_arg *args = data; + 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(xdr, nfs4_pathconf_bitmap, args->bitmask, + ARRAY_SIZE(nfs4_pathconf_bitmap), &hdr); + encode_nops(&hdr); +} + +/* + * a STATFS request + */ +static void nfs4_xdr_enc_statfs(struct rpc_rqst *req, struct xdr_stream *xdr, + const void *data) +{ + const struct nfs4_statfs_arg *args = data; + 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(xdr, nfs4_statfs_bitmap, args->bitmask, + ARRAY_SIZE(nfs4_statfs_bitmap), &hdr); + encode_nops(&hdr); +} + +/* + * GETATTR_BITMAP request + */ +static void nfs4_xdr_enc_server_caps(struct rpc_rqst *req, + struct xdr_stream *xdr, + const void *data) +{ + const struct nfs4_server_caps_arg *args = data; + const u32 *bitmask = args->bitmask; + 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(xdr, bitmask, NULL, 3, &hdr); + encode_nops(&hdr); +} + +/* + * a RENEW request + */ +static void nfs4_xdr_enc_renew(struct rpc_rqst *req, struct xdr_stream *xdr, + const void *data) + +{ + const struct nfs_client *clp = data; + 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, + const void *data) +{ + const struct nfs4_setclientid *sc = data; + 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, + const void *data) +{ + const struct nfs4_setclientid_res *arg = data; + struct compound_hdr hdr = { + .nops = 0, + }; + + encode_compound_hdr(xdr, req, &hdr); + encode_setclientid_confirm(xdr, arg, &hdr); + encode_nops(&hdr); +} + +/* + * DELEGRETURN request + */ +static void nfs4_xdr_enc_delegreturn(struct rpc_rqst *req, + struct xdr_stream *xdr, + const void *data) +{ + const struct nfs4_delegreturnargs *args = data; + 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); + if (args->lr_args) + encode_layoutreturn(xdr, args->lr_args, &hdr); + if (args->bitmask) + encode_getfattr(xdr, args->bitmask, &hdr); + encode_delegreturn(xdr, args->stateid, &hdr); + encode_nops(&hdr); +} + +/* + * Encode FS_LOCATIONS request + */ +static void nfs4_xdr_enc_fs_locations(struct rpc_rqst *req, + struct xdr_stream *xdr, + const void *data) +{ + const struct nfs4_fs_locations_arg *args = data; + 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); + if (args->migration) { + encode_putfh(xdr, args->fh, &hdr); + replen = hdr.replen; + encode_fs_locations(xdr, args->bitmask, &hdr); + if (args->renew) + encode_renew(xdr, args->clientid, &hdr); + } else { + encode_putfh(xdr, args->dir_fh, &hdr); + encode_lookup(xdr, args->name, &hdr); + replen = hdr.replen; + encode_fs_locations(xdr, args->bitmask, &hdr); + } + + rpc_prepare_reply_pages(req, (struct page **)&args->page, 0, + PAGE_SIZE, replen); + encode_nops(&hdr); +} + +/* + * Encode SECINFO request + */ +static void nfs4_xdr_enc_secinfo(struct rpc_rqst *req, + struct xdr_stream *xdr, + const void *data) +{ + const struct nfs4_secinfo_arg *args = data; + 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); +} + +/* + * Encode FSID_PRESENT request + */ +static void nfs4_xdr_enc_fsid_present(struct rpc_rqst *req, + struct xdr_stream *xdr, + const void *data) +{ + const struct nfs4_fsid_present_arg *args = data; + 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_getfh(xdr, &hdr); + if (args->renew) + encode_renew(xdr, args->clientid, &hdr); + encode_nops(&hdr); +} + +#if defined(CONFIG_NFS_V4_1) +/* + * BIND_CONN_TO_SESSION request + */ +static void nfs4_xdr_enc_bind_conn_to_session(struct rpc_rqst *req, + struct xdr_stream *xdr, + const void *data) +{ + const struct nfs41_bind_conn_to_session_args *args = data; + struct compound_hdr hdr = { + .minorversion = args->client->cl_mvops->minor_version, + }; + + encode_compound_hdr(xdr, req, &hdr); + encode_bind_conn_to_session(xdr, args, &hdr); + encode_nops(&hdr); +} + +/* + * EXCHANGE_ID request + */ +static void nfs4_xdr_enc_exchange_id(struct rpc_rqst *req, + struct xdr_stream *xdr, + const void *data) +{ + const struct nfs41_exchange_id_args *args = data; + 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, + const void *data) +{ + const struct nfs41_create_session_args *args = data; + 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, + const void *data) +{ + const struct nfs4_session *session = data; + 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 DESTROY_CLIENTID request + */ +static void nfs4_xdr_enc_destroy_clientid(struct rpc_rqst *req, + struct xdr_stream *xdr, + const void *data) +{ + const struct nfs_client *clp = data; + struct compound_hdr hdr = { + .minorversion = clp->cl_mvops->minor_version, + }; + + encode_compound_hdr(xdr, req, &hdr); + encode_destroy_clientid(xdr, clp->cl_clientid, &hdr); + encode_nops(&hdr); +} + +/* + * a SEQUENCE request + */ +static void nfs4_xdr_enc_sequence(struct rpc_rqst *req, struct xdr_stream *xdr, + const void *data) +{ + const struct nfs4_sequence_args *args = data; + struct compound_hdr hdr = { + .minorversion = nfs4_xdr_minorversion(args), + }; + + encode_compound_hdr(xdr, req, &hdr); + encode_sequence(xdr, args, &hdr); + encode_nops(&hdr); +} + +#endif + +/* + * a GET_LEASE_TIME request + */ +static void nfs4_xdr_enc_get_lease_time(struct rpc_rqst *req, + struct xdr_stream *xdr, + const void *data) +{ + const struct nfs4_get_lease_time_args *args = data; + 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); +} + +#ifdef CONFIG_NFS_V4_1 + +/* + * a RECLAIM_COMPLETE request + */ +static void nfs4_xdr_enc_reclaim_complete(struct rpc_rqst *req, + struct xdr_stream *xdr, + const void *data) +{ + const struct nfs41_reclaim_complete_args *args = data; + 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 GETDEVICEINFO request + */ +static void nfs4_xdr_enc_getdeviceinfo(struct rpc_rqst *req, + struct xdr_stream *xdr, + const void *data) +{ + const struct nfs4_getdeviceinfo_args *args = data; + 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); + + replen = hdr.replen + op_decode_hdr_maxsz + 2; + + encode_getdeviceinfo(xdr, args, &hdr); + + /* set up reply kvec. device_addr4 opaque data is read into the + * pages */ + rpc_prepare_reply_pages(req, args->pdev->pages, args->pdev->pgbase, + args->pdev->pglen, replen); + encode_nops(&hdr); +} + +/* + * Encode LAYOUTGET request + */ +static void nfs4_xdr_enc_layoutget(struct rpc_rqst *req, + struct xdr_stream *xdr, + const void *data) +{ + const struct nfs4_layoutget_args *args = data; + 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); + + rpc_prepare_reply_pages(req, args->layout.pages, 0, + args->layout.pglen, hdr.replen - pagepad_maxsz); + encode_nops(&hdr); +} + +/* + * Encode LAYOUTCOMMIT request + */ +static void nfs4_xdr_enc_layoutcommit(struct rpc_rqst *req, + struct xdr_stream *xdr, + const void *priv) +{ + const struct nfs4_layoutcommit_args *args = priv; + 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, + const void *data) +{ + const struct nfs4_layoutreturn_args *args = data; + 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 void nfs4_xdr_enc_secinfo_no_name(struct rpc_rqst *req, + struct xdr_stream *xdr, + const void *data) +{ + const struct nfs41_secinfo_no_name_args *args = data; + 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); +} + +/* + * Encode TEST_STATEID request + */ +static void nfs4_xdr_enc_test_stateid(struct rpc_rqst *req, + struct xdr_stream *xdr, + const void *data) +{ + const struct nfs41_test_stateid_args *args = data; + 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, + const void *data) +{ + const struct nfs41_free_stateid_args *args = data; + 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 int decode_opaque_inline(struct xdr_stream *xdr, unsigned int *len, char **string) +{ + ssize_t ret = xdr_stream_decode_opaque_inline(xdr, (void **)string, + NFS4_OPAQUE_LIMIT); + if (unlikely(ret < 0)) + return -EIO; + *len = ret; + return 0; +} + +static int decode_compound_hdr(struct xdr_stream *xdr, struct compound_hdr *hdr) +{ + ssize_t ret; + void *ptr; + u32 tmp; + + if (xdr_stream_decode_u32(xdr, &tmp) < 0) + return -EIO; + hdr->status = tmp; + + ret = xdr_stream_decode_opaque_inline(xdr, &ptr, NFS4_OPAQUE_LIMIT); + if (ret < 0) + return -EIO; + hdr->taglen = ret; + hdr->tag = ptr; + + if (xdr_stream_decode_u32(xdr, &tmp) < 0) + return -EIO; + hdr->nops = tmp; + if (unlikely(hdr->nops < 1)) + return nfs4_stat_to_errno(hdr->status); + return 0; +} + +static bool __decode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 expected, + int *nfs_retval) +{ + __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 (unlikely(opnum != expected)) + goto out_bad_operation; + if (unlikely(*p != cpu_to_be32(NFS_OK))) + goto out_status; + *nfs_retval = 0; + return true; +out_status: + nfserr = be32_to_cpup(p); + trace_nfs4_xdr_status(xdr, opnum, nfserr); + *nfs_retval = nfs4_stat_to_errno(nfserr); + return true; +out_bad_operation: + trace_nfs4_xdr_bad_operation(xdr, opnum, expected); + *nfs_retval = -EREMOTEIO; + return false; +out_overflow: + *nfs_retval = -EIO; + return false; +} + +static int decode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 expected) +{ + int retval; + + __decode_op_hdr(xdr, expected, &retval); + return retval; +} + +/* Dummy routine */ +static int decode_ace(struct xdr_stream *xdr, void *ace) +{ + __be32 *p; + unsigned int strlen; + char *str; + + p = xdr_inline_decode(xdr, 12); + if (unlikely(!p)) + return -EIO; + return decode_opaque_inline(xdr, &strlen, &str); +} + +static ssize_t +decode_bitmap4(struct xdr_stream *xdr, uint32_t *bitmap, size_t sz) +{ + ssize_t ret; + + ret = xdr_stream_decode_uint32_array(xdr, bitmap, sz); + if (likely(ret >= 0)) + return ret; + if (ret != -EMSGSIZE) + return -EIO; + return sz; +} + +static int decode_attr_bitmap(struct xdr_stream *xdr, uint32_t *bitmap) +{ + ssize_t ret; + ret = decode_bitmap4(xdr, bitmap, 3); + return ret < 0 ? ret : 0; +} + +static int decode_attr_length(struct xdr_stream *xdr, uint32_t *attrlen, unsigned int *savep) +{ + __be32 *p; + + p = xdr_inline_decode(xdr, 4); + if (unlikely(!p)) + return -EIO; + *attrlen = be32_to_cpup(p); + *savep = xdr_stream_pos(xdr); + return 0; +} + +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)) + return -EIO; + *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; +} + +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)) + return -EIO; + *type = be32_to_cpup(p); + bitmap[0] &= ~FATTR4_WORD0_FH_EXPIRE_TYPE; + } + dprintk("%s: expire type=0x%x\n", __func__, *type); + return 0; +} + +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)) + return -EIO; + 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; +} + +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)) + return -EIO; + 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; +} + +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)) + return -EIO; + *res = be32_to_cpup(p); + bitmap[0] &= ~FATTR4_WORD0_LINK_SUPPORT; + } + dprintk("%s: link support=%s\n", __func__, *res == 0 ? "false" : "true"); + return 0; +} + +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)) + return -EIO; + *res = be32_to_cpup(p); + bitmap[0] &= ~FATTR4_WORD0_SYMLINK_SUPPORT; + } + dprintk("%s: symlink support=%s\n", __func__, *res == 0 ? "false" : "true"); + return 0; +} + +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)) + return -EIO; + 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; +} + +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)) + return -EIO; + *res = be32_to_cpup(p); + bitmap[0] &= ~FATTR4_WORD0_LEASE_TIME; + } + dprintk("%s: lease time=%u\n", __func__, (unsigned int)*res); + return 0; +} + +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)) + return -EIO; + bitmap[0] &= ~FATTR4_WORD0_RDATTR_ERROR; + *res = -be32_to_cpup(p); + } + return 0; +} + +static int decode_attr_exclcreat_supported(struct xdr_stream *xdr, + uint32_t *bitmap, uint32_t *bitmask) +{ + if (likely(bitmap[2] & FATTR4_WORD2_SUPPATTR_EXCLCREAT)) { + int ret; + ret = decode_attr_bitmap(xdr, bitmask); + if (unlikely(ret < 0)) + return ret; + bitmap[2] &= ~FATTR4_WORD2_SUPPATTR_EXCLCREAT; + } 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_filehandle(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_fh *fh) +{ + __be32 *p; + u32 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)) + return -EIO; + len = be32_to_cpup(p); + if (len > NFS4_FHSIZE || len == 0) { + trace_nfs4_xdr_bad_filehandle(xdr, OP_READDIR, + NFS4ERR_BADHANDLE); + return -EREMOTEIO; + } + p = xdr_inline_decode(xdr, len); + if (unlikely(!p)) + return -EIO; + if (fh != NULL) { + memcpy(fh->data, p, len); + fh->size = len; + } + bitmap[0] &= ~FATTR4_WORD0_FILEHANDLE; + } + return 0; +} + +static int decode_attr_aclsupport(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res) +{ + __be32 *p; + + *res = 0; + 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)) + return -EIO; + *res = be32_to_cpup(p); + bitmap[0] &= ~FATTR4_WORD0_ACLSUPPORT; + } + dprintk("%s: ACLs supported=%u\n", __func__, (unsigned int)*res); + return 0; +} + +static int decode_attr_case_insensitive(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res) +{ + __be32 *p; + + *res = 0; + if (unlikely(bitmap[0] & (FATTR4_WORD0_CASE_INSENSITIVE - 1U))) + return -EIO; + if (likely(bitmap[0] & FATTR4_WORD0_CASE_INSENSITIVE)) { + p = xdr_inline_decode(xdr, 4); + if (unlikely(!p)) + return -EIO; + *res = be32_to_cpup(p); + bitmap[0] &= ~FATTR4_WORD0_CASE_INSENSITIVE; + } + dprintk("%s: case_insensitive=%s\n", __func__, *res == 0 ? "false" : "true"); + return 0; +} + +static int decode_attr_case_preserving(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res) +{ + __be32 *p; + + *res = 0; + if (unlikely(bitmap[0] & (FATTR4_WORD0_CASE_PRESERVING - 1U))) + return -EIO; + if (likely(bitmap[0] & FATTR4_WORD0_CASE_PRESERVING)) { + p = xdr_inline_decode(xdr, 4); + if (unlikely(!p)) + return -EIO; + *res = be32_to_cpup(p); + bitmap[0] &= ~FATTR4_WORD0_CASE_PRESERVING; + } + dprintk("%s: case_preserving=%s\n", __func__, *res == 0 ? "false" : "true"); + return 0; +} + +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)) + return -EIO; + 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; +} + +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)) + return -EIO; + 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; +} + +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)) + return -EIO; + xdr_decode_hyper(p, res); + bitmap[0] &= ~FATTR4_WORD0_FILES_AVAIL; + } + dprintk("%s: files avail=%Lu\n", __func__, (unsigned long long)*res); + return status; +} + +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)) + return -EIO; + xdr_decode_hyper(p, res); + bitmap[0] &= ~FATTR4_WORD0_FILES_FREE; + } + dprintk("%s: files free=%Lu\n", __func__, (unsigned long long)*res); + return status; +} + +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)) + return -EIO; + xdr_decode_hyper(p, res); + bitmap[0] &= ~FATTR4_WORD0_FILES_TOTAL; + } + dprintk("%s: files total=%Lu\n", __func__, (unsigned long long)*res); + return status; +} + +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)) + return -EIO; + n = be32_to_cpup(p); + if (n == 0) + goto root_path; + dprintk("pathname4: "); + if (n > NFS4_PATHNAME_MAXCOMPONENTS) { + dprintk("cannot parse %d components in path\n", n); + goto out_eio; + } + for (path->ncomponents = 0; path->ncomponents < n; path->ncomponents++) { + 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); + } +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; +} + +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; + bitmap[0] &= ~FATTR4_WORD0_FS_LOCATIONS; + 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_eio; + n = be32_to_cpup(p); + for (res->nlocations = 0; res->nlocations < n; res->nlocations++) { + u32 m; + struct nfs4_fs_location *loc; + + if (res->nlocations == NFS4_FS_LOCATIONS_MAXENTRIES) + break; + loc = &res->locations[res->nlocations]; + p = xdr_inline_decode(xdr, 4); + if (unlikely(!p)) + goto out_eio; + m = be32_to_cpup(p); + + dprintk("%s: servers:\n", __func__); + for (loc->nservers = 0; loc->nservers < m; loc->nservers++) { + struct nfs4_string *server; + + if (loc->nservers == NFS4_FS_LOCATION_MAXSERVERS) { + 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; + } + break; + } + 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); + } + status = decode_pathname(xdr, &loc->rootpath); + if (unlikely(status != 0)) + goto out_eio; + } + if (res->nlocations != 0) + status = NFS_ATTR_FATTR_V4_LOCATIONS; +out: + dprintk("%s: fs_locations done, error = %d\n", __func__, status); + return status; +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)) + return -EIO; + xdr_decode_hyper(p, res); + bitmap[0] &= ~FATTR4_WORD0_MAXFILESIZE; + } + dprintk("%s: maxfilesize=%Lu\n", __func__, (unsigned long long)*res); + return status; +} + +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)) + return -EIO; + *maxlink = be32_to_cpup(p); + bitmap[0] &= ~FATTR4_WORD0_MAXLINK; + } + dprintk("%s: maxlink=%u\n", __func__, *maxlink); + return status; +} + +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)) + return -EIO; + *maxname = be32_to_cpup(p); + bitmap[0] &= ~FATTR4_WORD0_MAXNAME; + } + dprintk("%s: maxname=%u\n", __func__, *maxname); + return status; +} + +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)) + return -EIO; + 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; +} + +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)) + return -EIO; + 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; +} + +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)) + return -EIO; + 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; +} + +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)) + return -EIO; + *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; +} + +static ssize_t decode_nfs4_string(struct xdr_stream *xdr, + struct nfs4_string *name, gfp_t gfp_flags) +{ + ssize_t ret; + + ret = xdr_stream_decode_string_dup(xdr, &name->data, + XDR_MAX_NETOBJ, gfp_flags); + name->len = 0; + if (ret > 0) + name->len = ret; + return ret; +} + +static int decode_attr_owner(struct xdr_stream *xdr, uint32_t *bitmap, + const struct nfs_server *server, kuid_t *uid, + struct nfs4_string *owner_name) +{ + ssize_t len; + char *p; + + *uid = make_kuid(&init_user_ns, -2); + if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER - 1U))) + return -EIO; + if (!(bitmap[1] & FATTR4_WORD1_OWNER)) + return 0; + bitmap[1] &= ~FATTR4_WORD1_OWNER; + + if (owner_name != NULL) { + len = decode_nfs4_string(xdr, owner_name, GFP_NOIO); + if (len <= 0) + goto out; + dprintk("%s: name=%s\n", __func__, owner_name->data); + return NFS_ATTR_FATTR_OWNER_NAME; + } else { + len = xdr_stream_decode_opaque_inline(xdr, (void **)&p, + XDR_MAX_NETOBJ); + if (len <= 0 || nfs_map_name_to_uid(server, p, len, uid) != 0) + goto out; + dprintk("%s: uid=%d\n", __func__, (int)from_kuid(&init_user_ns, *uid)); + return NFS_ATTR_FATTR_OWNER; + } +out: + if (len == -EBADMSG) + return -EIO; + return 0; +} + +static int decode_attr_group(struct xdr_stream *xdr, uint32_t *bitmap, + const struct nfs_server *server, kgid_t *gid, + struct nfs4_string *group_name) +{ + ssize_t len; + char *p; + + *gid = make_kgid(&init_user_ns, -2); + if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER_GROUP - 1U))) + return -EIO; + if (!(bitmap[1] & FATTR4_WORD1_OWNER_GROUP)) + return 0; + bitmap[1] &= ~FATTR4_WORD1_OWNER_GROUP; + + if (group_name != NULL) { + len = decode_nfs4_string(xdr, group_name, GFP_NOIO); + if (len <= 0) + goto out; + dprintk("%s: name=%s\n", __func__, group_name->data); + return NFS_ATTR_FATTR_GROUP_NAME; + } else { + len = xdr_stream_decode_opaque_inline(xdr, (void **)&p, + XDR_MAX_NETOBJ); + if (len <= 0 || nfs_map_group_to_gid(server, p, len, gid) != 0) + goto out; + dprintk("%s: gid=%d\n", __func__, (int)from_kgid(&init_user_ns, *gid)); + return NFS_ATTR_FATTR_GROUP; + } +out: + if (len == -EBADMSG) + return -EIO; + return 0; +} + +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)) + return -EIO; + 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; +} + +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)) + return -EIO; + xdr_decode_hyper(p, res); + bitmap[1] &= ~FATTR4_WORD1_SPACE_AVAIL; + } + dprintk("%s: space avail=%Lu\n", __func__, (unsigned long long)*res); + return status; +} + +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)) + return -EIO; + xdr_decode_hyper(p, res); + bitmap[1] &= ~FATTR4_WORD1_SPACE_FREE; + } + dprintk("%s: space free=%Lu\n", __func__, (unsigned long long)*res); + return status; +} + +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)) + return -EIO; + xdr_decode_hyper(p, res); + bitmap[1] &= ~FATTR4_WORD1_SPACE_TOTAL; + } + dprintk("%s: space total=%Lu\n", __func__, (unsigned long long)*res); + return status; +} + +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)) + return -EIO; + 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; +} + +static __be32 * +xdr_decode_nfstime4(__be32 *p, struct timespec64 *t) +{ + __u64 sec; + + p = xdr_decode_hyper(p, &sec); + t-> tv_sec = sec; + t->tv_nsec = be32_to_cpup(p++); + return p; +} + +static int decode_attr_time(struct xdr_stream *xdr, struct timespec64 *time) +{ + __be32 *p; + + p = xdr_inline_decode(xdr, nfstime4_maxsz << 2); + if (unlikely(!p)) + return -EIO; + xdr_decode_nfstime4(p, time); + return 0; +} + +static int decode_attr_time_access(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec64 *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=%lld\n", __func__, time->tv_sec); + return status; +} + +static int decode_attr_time_metadata(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec64 *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=%lld\n", __func__, time->tv_sec); + return status; +} + +static int decode_attr_time_delta(struct xdr_stream *xdr, uint32_t *bitmap, + struct timespec64 *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=%lld %ld\n", __func__, time->tv_sec, + time->tv_nsec); + return status; +} + +static int decode_attr_security_label(struct xdr_stream *xdr, uint32_t *bitmap, + struct nfs4_label *label) +{ + uint32_t pi = 0; + uint32_t lfs = 0; + __u32 len; + __be32 *p; + int status = 0; + + if (unlikely(bitmap[2] & (FATTR4_WORD2_SECURITY_LABEL - 1U))) + return -EIO; + if (likely(bitmap[2] & FATTR4_WORD2_SECURITY_LABEL)) { + p = xdr_inline_decode(xdr, 4); + if (unlikely(!p)) + return -EIO; + lfs = be32_to_cpup(p++); + p = xdr_inline_decode(xdr, 4); + if (unlikely(!p)) + return -EIO; + pi = be32_to_cpup(p++); + p = xdr_inline_decode(xdr, 4); + if (unlikely(!p)) + return -EIO; + len = be32_to_cpup(p++); + p = xdr_inline_decode(xdr, len); + if (unlikely(!p)) + return -EIO; + bitmap[2] &= ~FATTR4_WORD2_SECURITY_LABEL; + if (len < NFS4_MAXLABELLEN) { + if (label && label->len) { + if (label->len < len) + return -ERANGE; + memcpy(label->label, p, len); + label->len = len; + label->pi = pi; + label->lfs = lfs; + status = NFS_ATTR_FATTR_V4_SECURITY_LABEL; + } + } else + printk(KERN_WARNING "%s: label too long (%u)!\n", + __func__, len); + if (label && label->label) + dprintk("%s: label=%.*s, len=%d, PI=%d, LFS=%d\n", + __func__, label->len, (char *)label->label, + label->len, label->pi, label->lfs); + } + return status; +} + +static int decode_attr_time_modify(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec64 *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=%lld\n", __func__, time->tv_sec); + return status; +} + +static int decode_attr_xattrsupport(struct xdr_stream *xdr, uint32_t *bitmap, + uint32_t *res) +{ + __be32 *p; + + *res = 0; + if (unlikely(bitmap[2] & (FATTR4_WORD2_XATTR_SUPPORT - 1U))) + return -EIO; + if (likely(bitmap[2] & FATTR4_WORD2_XATTR_SUPPORT)) { + p = xdr_inline_decode(xdr, 4); + if (unlikely(!p)) + return -EIO; + *res = be32_to_cpup(p); + bitmap[2] &= ~FATTR4_WORD2_XATTR_SUPPORT; + } + dprintk("%s: XATTR support=%s\n", __func__, + *res == 0 ? "false" : "true"); + return 0; +} + +static int verify_attr_len(struct xdr_stream *xdr, unsigned int savep, uint32_t attrlen) +{ + unsigned int attrwords = XDR_QUADLEN(attrlen); + unsigned int nwords = (xdr_stream_pos(xdr) - savep) >> 2; + + 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)) + return -EIO; + cinfo->atomic = be32_to_cpup(p++); + p = xdr_decode_hyper(p, &cinfo->before); + xdr_decode_hyper(p, &cinfo->after); + return 0; +} + +static int decode_access(struct xdr_stream *xdr, u32 *supported, u32 *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)) + return -EIO; + supp = be32_to_cpup(p++); + acc = be32_to_cpup(p); + *supported = supp; + *access = acc; + return 0; +} + +static int decode_opaque_fixed(struct xdr_stream *xdr, void *buf, size_t len) +{ + ssize_t ret = xdr_stream_decode_opaque_fixed(xdr, buf, len); + if (unlikely(ret < 0)) + return -EIO; + return 0; +} + +static int decode_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid) +{ + return decode_opaque_fixed(xdr, stateid, NFS4_STATEID_SIZE); +} + +static int decode_open_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid) +{ + stateid->type = NFS4_OPEN_STATEID_TYPE; + return decode_stateid(xdr, stateid); +} + +static int decode_lock_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid) +{ + stateid->type = NFS4_LOCK_STATEID_TYPE; + return decode_stateid(xdr, stateid); +} + +static int decode_delegation_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid) +{ + stateid->type = NFS4_DELEGATION_STATEID_TYPE; + return decode_stateid(xdr, stateid); +} + +static int decode_invalid_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid) +{ + nfs4_stateid dummy; + + nfs4_stateid_copy(stateid, &invalid_stateid); + return decode_stateid(xdr, &dummy); +} + +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_invalid_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_write_verifier(struct xdr_stream *xdr, struct nfs_write_verifier *verifier) +{ + return decode_opaque_fixed(xdr, verifier->data, NFS4_VERIFIER_SIZE); +} + +static int decode_commit(struct xdr_stream *xdr, struct nfs_commitres *res) +{ + struct nfs_writeverf *verf = res->verf; + int status; + + status = decode_op_hdr(xdr, OP_COMMIT); + if (!status) + status = decode_write_verifier(xdr, &verf->verifier); + if (!status) + verf->committed = NFS_FILE_SYNC; + 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)) + return -EIO; + bmlen = be32_to_cpup(p); + p = xdr_inline_decode(xdr, bmlen << 2); + if (likely(p)) + return 0; + return -EIO; +} + +static int decode_server_caps(struct xdr_stream *xdr, struct nfs4_server_caps_res *res) +{ + unsigned int 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; + if ((status = decode_attr_case_insensitive(xdr, bitmap, &res->case_insensitive)) != 0) + goto xdr_error; + if ((status = decode_attr_case_preserving(xdr, bitmap, &res->case_preserving)) != 0) + goto xdr_error; + if ((status = decode_attr_exclcreat_supported(xdr, bitmap, + res->exclcreat_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) +{ + unsigned int 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; + + status = -EIO; + if (unlikely(bitmap[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) +{ + unsigned int 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_threshold_hint(struct xdr_stream *xdr, + uint32_t *bitmap, + uint64_t *res, + uint32_t hint_bit) +{ + __be32 *p; + + *res = 0; + if (likely(bitmap[0] & hint_bit)) { + p = xdr_inline_decode(xdr, 8); + if (unlikely(!p)) + return -EIO; + xdr_decode_hyper(p, res); + } + return 0; +} + +static int decode_first_threshold_item4(struct xdr_stream *xdr, + struct nfs4_threshold *res) +{ + __be32 *p; + unsigned int savep; + uint32_t bitmap[3] = {0,}, attrlen; + int status; + + /* layout type */ + p = xdr_inline_decode(xdr, 4); + if (unlikely(!p)) + return -EIO; + res->l_type = be32_to_cpup(p); + + /* thi_hintset bitmap */ + status = decode_attr_bitmap(xdr, bitmap); + if (status < 0) + goto xdr_error; + + /* thi_hintlist length */ + status = decode_attr_length(xdr, &attrlen, &savep); + if (status < 0) + goto xdr_error; + /* thi_hintlist */ + status = decode_threshold_hint(xdr, bitmap, &res->rd_sz, THRESHOLD_RD); + if (status < 0) + goto xdr_error; + status = decode_threshold_hint(xdr, bitmap, &res->wr_sz, THRESHOLD_WR); + if (status < 0) + goto xdr_error; + status = decode_threshold_hint(xdr, bitmap, &res->rd_io_sz, + THRESHOLD_RD_IO); + if (status < 0) + goto xdr_error; + status = decode_threshold_hint(xdr, bitmap, &res->wr_io_sz, + THRESHOLD_WR_IO); + if (status < 0) + goto xdr_error; + + status = verify_attr_len(xdr, savep, attrlen); + res->bm = bitmap[0]; + + dprintk("%s bm=0x%x rd_sz=%llu wr_sz=%llu rd_io=%llu wr_io=%llu\n", + __func__, res->bm, res->rd_sz, res->wr_sz, res->rd_io_sz, + res->wr_io_sz); +xdr_error: + dprintk("%s ret=%d!\n", __func__, status); + return status; +} + +/* + * Thresholds on pNFS direct I/O vrs MDS I/O + */ +static int decode_attr_mdsthreshold(struct xdr_stream *xdr, + uint32_t *bitmap, + struct nfs4_threshold *res) +{ + __be32 *p; + int status = 0; + uint32_t num; + + if (unlikely(bitmap[2] & (FATTR4_WORD2_MDSTHRESHOLD - 1U))) + return -EIO; + if (bitmap[2] & FATTR4_WORD2_MDSTHRESHOLD) { + /* Did the server return an unrequested attribute? */ + if (unlikely(res == NULL)) + return -EREMOTEIO; + p = xdr_inline_decode(xdr, 4); + if (unlikely(!p)) + return -EIO; + num = be32_to_cpup(p); + if (num == 0) + return 0; + if (num > 1) + printk(KERN_INFO "%s: Warning: Multiple pNFS layout " + "drivers per filesystem not supported\n", + __func__); + + status = decode_first_threshold_item4(xdr, res); + bitmap[2] &= ~FATTR4_WORD2_MDSTHRESHOLD; + } + 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 = -EIO; + if (unlikely(bitmap[0])) + goto xdr_error; + + 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; + + status = -EIO; + if (unlikely(bitmap[1])) + goto xdr_error; + + status = decode_attr_mdsthreshold(xdr, bitmap, fattr->mdsthreshold); + if (status < 0) + goto xdr_error; + + status = decode_attr_security_label(xdr, bitmap, fattr->label); + 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) +{ + unsigned int 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. + */ +static int decode_pnfs_layout_types(struct xdr_stream *xdr, + struct nfs_fsinfo *fsinfo) +{ + __be32 *p; + uint32_t i; + + p = xdr_inline_decode(xdr, 4); + if (unlikely(!p)) + return -EIO; + fsinfo->nlayouttypes = be32_to_cpup(p); + + /* pNFS is not supported by the underlying file system */ + if (fsinfo->nlayouttypes == 0) + return 0; + + /* Decode and set first layout type, move xdr->p past unused types */ + p = xdr_inline_decode(xdr, fsinfo->nlayouttypes * 4); + if (unlikely(!p)) + return -EIO; + + /* If we get too many, then just cap it at the max */ + if (fsinfo->nlayouttypes > NFS_MAX_LAYOUT_TYPES) { + printk(KERN_INFO "NFS: %s: Warning: Too many (%u) pNFS layout types\n", + __func__, fsinfo->nlayouttypes); + fsinfo->nlayouttypes = NFS_MAX_LAYOUT_TYPES; + } + + for(i = 0; i < fsinfo->nlayouttypes; ++i) + fsinfo->layouttype[i] = be32_to_cpup(p++); + return 0; +} + +/* + * 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, + struct nfs_fsinfo *fsinfo) +{ + 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_pnfs_layout_types(xdr, fsinfo); + bitmap[1] &= ~FATTR4_WORD1_FS_LAYOUT_TYPES; + } + 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)) + return -EIO; + *res = be32_to_cpup(p); + bitmap[2] &= ~FATTR4_WORD2_LAYOUT_BLKSIZE; + } + return 0; +} + +/* + * The granularity of a CLONE operation. + */ +static int decode_attr_clone_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_CLONE_BLKSIZE) { + p = xdr_inline_decode(xdr, 4); + if (unlikely(!p)) + return -EIO; + *res = be32_to_cpup(p); + bitmap[2] &= ~FATTR4_WORD2_CLONE_BLKSIZE; + } + return 0; +} + +static int decode_attr_change_attr_type(struct xdr_stream *xdr, + uint32_t *bitmap, + enum nfs4_change_attr_type *res) +{ + u32 tmp = NFS4_CHANGE_TYPE_IS_UNDEFINED; + + dprintk("%s: bitmap is %x\n", __func__, bitmap[2]); + if (bitmap[2] & FATTR4_WORD2_CHANGE_ATTR_TYPE) { + if (xdr_stream_decode_u32(xdr, &tmp)) + return -EIO; + bitmap[2] &= ~FATTR4_WORD2_CHANGE_ATTR_TYPE; + } + + switch(tmp) { + case NFS4_CHANGE_TYPE_IS_MONOTONIC_INCR: + case NFS4_CHANGE_TYPE_IS_VERSION_COUNTER: + case NFS4_CHANGE_TYPE_IS_VERSION_COUNTER_NOPNFS: + case NFS4_CHANGE_TYPE_IS_TIME_METADATA: + *res = tmp; + break; + default: + *res = NFS4_CHANGE_TYPE_IS_UNDEFINED; + } + return 0; +} + +static int decode_fsinfo(struct xdr_stream *xdr, struct nfs_fsinfo *fsinfo) +{ + unsigned int 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 = -EIO; + if (unlikely(bitmap[0])) + goto xdr_error; + + status = decode_attr_time_delta(xdr, bitmap, &fsinfo->time_delta); + if (status != 0) + goto xdr_error; + status = decode_attr_pnfstype(xdr, bitmap, fsinfo); + if (status != 0) + goto xdr_error; + + status = -EIO; + if (unlikely(bitmap[1])) + goto xdr_error; + + status = decode_attr_layout_blksize(xdr, bitmap, &fsinfo->blksize); + if (status) + goto xdr_error; + status = decode_attr_clone_blksize(xdr, bitmap, &fsinfo->clone_blksize); + if (status) + goto xdr_error; + + status = decode_attr_change_attr_type(xdr, bitmap, + &fsinfo->change_attr_type); + if (status) + goto xdr_error; + + status = decode_attr_xattrsupport(xdr, bitmap, + &fsinfo->xattr_support); + 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)) + return -EIO; + len = be32_to_cpup(p); + if (len > NFS4_FHSIZE || len == 0) { + trace_nfs4_xdr_bad_filehandle(xdr, OP_GETFH, NFS4ERR_BADHANDLE); + return -EREMOTEIO; + } + fh->size = len; + p = xdr_inline_decode(xdr, len); + if (unlikely(!p)) + return -EIO; + memcpy(fh->data, p, len); + return 0; +} + +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)) + return -EIO; + 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 -EIO; + return -NFS4ERR_DENIED; +} + +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_lock_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_lock_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); +} + +static int decode_lookupp(struct xdr_stream *xdr) +{ + return decode_op_hdr(xdr, OP_LOOKUPP); +} + +/* This is too sick! */ +static int decode_space_limit(struct xdr_stream *xdr, + unsigned long *pagemod_limit) +{ + __be32 *p; + uint32_t limit_type, nblocks, blocksize; + u64 maxsize = 0; + + p = xdr_inline_decode(xdr, 12); + if (unlikely(!p)) + return -EIO; + limit_type = be32_to_cpup(p++); + switch (limit_type) { + case NFS4_LIMIT_SIZE: + xdr_decode_hyper(p, &maxsize); + break; + case NFS4_LIMIT_BLOCKS: + nblocks = be32_to_cpup(p++); + blocksize = be32_to_cpup(p); + maxsize = (uint64_t)nblocks * (uint64_t)blocksize; + } + maxsize >>= PAGE_SHIFT; + *pagemod_limit = min_t(u64, maxsize, ULONG_MAX); + return 0; +} + +static int decode_rw_delegation(struct xdr_stream *xdr, + uint32_t delegation_type, + struct nfs_openres *res) +{ + __be32 *p; + int status; + + status = decode_delegation_stateid(xdr, &res->delegation); + if (unlikely(status)) + return status; + p = xdr_inline_decode(xdr, 4); + if (unlikely(!p)) + return -EIO; + 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->pagemod_limit) < 0) + return -EIO; + } + return decode_ace(xdr, NULL); +} + +static int decode_no_delegation(struct xdr_stream *xdr, struct nfs_openres *res) +{ + __be32 *p; + uint32_t why_no_delegation; + + p = xdr_inline_decode(xdr, 4); + if (unlikely(!p)) + return -EIO; + why_no_delegation = be32_to_cpup(p); + switch (why_no_delegation) { + case WND4_CONTENTION: + case WND4_RESOURCE: + xdr_inline_decode(xdr, 4); + /* Ignore for now */ + } + return 0; +} + +static int decode_delegation(struct xdr_stream *xdr, struct nfs_openres *res) +{ + __be32 *p; + uint32_t delegation_type; + + p = xdr_inline_decode(xdr, 4); + if (unlikely(!p)) + return -EIO; + delegation_type = be32_to_cpup(p); + res->delegation_type = 0; + switch (delegation_type) { + case NFS4_OPEN_DELEGATE_NONE: + return 0; + case NFS4_OPEN_DELEGATE_READ: + case NFS4_OPEN_DELEGATE_WRITE: + return decode_rw_delegation(xdr, delegation_type, res); + case NFS4_OPEN_DELEGATE_NONE_EXT: + return decode_no_delegation(xdr, res); + } + return -EIO; +} + +static int decode_open(struct xdr_stream *xdr, struct nfs_openres *res) +{ + __be32 *p; + uint32_t savewords, bmlen, i; + int status; + + if (!__decode_op_hdr(xdr, OP_OPEN, &status)) + return status; + nfs_increment_open_seqid(status, res->seqid); + if (status) + return status; + status = decode_open_stateid(xdr, &res->stateid); + if (unlikely(status)) + return status; + + decode_change_info(xdr, &res->cinfo); + + p = xdr_inline_decode(xdr, 8); + if (unlikely(!p)) + return -EIO; + 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)) + return -EIO; + 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; +} + +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_open_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_open_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_pgio_res *res) +{ + __be32 *p; + uint32_t count, eof, recvd; + int status; + + status = decode_op_hdr(xdr, OP_READ); + if (status) + return status; + p = xdr_inline_decode(xdr, 8); + if (unlikely(!p)) + return -EIO; + eof = be32_to_cpup(p++); + count = be32_to_cpup(p); + recvd = xdr_read_pages(xdr, count); + if (count > recvd) { + dprintk("NFS: server cheating in read reply: " + "count %u > recvd %u\n", count, recvd); + count = recvd; + eof = 0; + } + res->eof = eof; + res->count = count; + return 0; +} + +static int decode_readdir(struct xdr_stream *xdr, struct rpc_rqst *req, struct nfs4_readdir_res *readdir) +{ + 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]); + return xdr_read_pages(xdr, xdr->buf->page_len); +} + +static int decode_readlink(struct xdr_stream *xdr, struct rpc_rqst *req) +{ + struct xdr_buf *rcvbuf = &req->rq_rcv_buf; + 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)) + return -EIO; + len = be32_to_cpup(p); + if (len >= rcvbuf->page_len || len <= 0) { + dprintk("nfs: server returned giant symlink!\n"); + return -ENAMETOOLONG; + } + recvd = xdr_read_pages(xdr, len); + if (recvd < len) { + dprintk("NFS: server cheating in readlink reply: " + "count %u > recvd %u\n", len, recvd); + return -EIO; + } + /* + * 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 null-terminate the text (the VFS expects + * null-termination). + */ + xdr_terminate_string(rcvbuf, len); + return 0; +} + +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, enum nfs4_acl_type type) +{ + unsigned int savep; + uint32_t attrlen, + bitmap[3] = {0}; + int status; + + res->acl_len = 0; + if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0) + goto out; + + xdr_enter_page(xdr, xdr->buf->page_len); + + if ((status = decode_attr_bitmap(xdr, bitmap)) != 0) + goto out; + if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0) + goto out; + + switch (type) { + default: + if (unlikely(bitmap[0] & (FATTR4_WORD0_ACL - 1U))) + return -EIO; + if (!(bitmap[0] & FATTR4_WORD0_ACL)) + return -EOPNOTSUPP; + break; + case NFS4ACL_DACL: + if (unlikely(bitmap[0] || bitmap[1] & (FATTR4_WORD1_DACL - 1U))) + return -EIO; + if (!(bitmap[1] & FATTR4_WORD1_DACL)) + return -EOPNOTSUPP; + break; + case NFS4ACL_SACL: + if (unlikely(bitmap[0] || bitmap[1] & (FATTR4_WORD1_SACL - 1U))) + return -EIO; + if (!(bitmap[1] & FATTR4_WORD1_SACL)) + return -EOPNOTSUPP; + } + + /* 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.*/ + res->acl_data_offset = xdr_page_pos(xdr); + res->acl_len = attrlen; + + /* Check for receive buffer overflow */ + if (res->acl_len > xdr_stream_remaining(xdr) || + res->acl_len + res->acl_data_offset > xdr->buf->page_len) { + res->acl_flags |= NFS4_ACL_TRUNC; + dprintk("NFS: acl reply: attrlen %u > page_len %zu\n", + attrlen, xdr_stream_remaining(xdr)); + } +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) +{ + int status; + + status = decode_op_hdr(xdr, OP_SETATTR); + if (status) + return status; + if (decode_bitmap4(xdr, NULL, 0) >= 0) + return 0; + 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)) + return -EIO; + 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)) + return -EIO; + 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)) + return -EIO; + len = be32_to_cpup(p); + p = xdr_inline_decode(xdr, len); + if (unlikely(!p)) + return -EIO; + + /* skip uaddr string */ + p = xdr_inline_decode(xdr, 4); + if (unlikely(!p)) + return -EIO; + len = be32_to_cpup(p); + p = xdr_inline_decode(xdr, len); + if (unlikely(!p)) + return -EIO; + return -NFSERR_CLID_INUSE; + } else + return nfs4_stat_to_errno(nfserr); + + return 0; +} + +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_pgio_res *res) +{ + __be32 *p; + int status; + + status = decode_op_hdr(xdr, OP_WRITE); + if (status) + return status; + + p = xdr_inline_decode(xdr, 8); + if (unlikely(!p)) + return -EIO; + res->count = be32_to_cpup(p++); + res->verf->committed = be32_to_cpup(p++); + return decode_write_verifier(xdr, &res->verf->verifier); +} + +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_secinfo4 *flavor) +{ + u32 oid_len; + __be32 *p; + + p = xdr_inline_decode(xdr, 4); + if (unlikely(!p)) + return -EIO; + oid_len = be32_to_cpup(p); + if (oid_len > GSS_OID_MAX_LEN) + return -EINVAL; + + p = xdr_inline_decode(xdr, oid_len); + if (unlikely(!p)) + return -EIO; + memcpy(flavor->flavor_info.oid.data, p, oid_len); + flavor->flavor_info.oid.len = oid_len; + + p = xdr_inline_decode(xdr, 8); + if (unlikely(!p)) + return -EIO; + flavor->flavor_info.qop = be32_to_cpup(p++); + flavor->flavor_info.service = be32_to_cpup(p); + + return 0; +} + +static int decode_secinfo_common(struct xdr_stream *xdr, struct nfs4_secinfo_res *res) +{ + struct nfs4_secinfo4 *sec_flavor; + unsigned int i, num_flavors; + int status; + __be32 *p; + + p = xdr_inline_decode(xdr, 4); + if (unlikely(!p)) + return -EIO; + + 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)) + return -EIO; + 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; +} + +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_op_map(struct xdr_stream *xdr, struct nfs4_op_map *op_map) +{ + if (xdr_stream_decode_uint32_array(xdr, op_map->u.words, + ARRAY_SIZE(op_map->u.words)) < 0) + return -EIO; + return 0; +} + +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; + 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)) + return -EIO; + xdr_decode_hyper(p, &res->clientid); + p = xdr_inline_decode(xdr, 12); + if (unlikely(!p)) + return -EIO; + res->seqid = be32_to_cpup(p++); + res->flags = be32_to_cpup(p++); + + res->state_protect.how = be32_to_cpup(p); + switch (res->state_protect.how) { + case SP4_NONE: + break; + case SP4_MACH_CRED: + status = decode_op_map(xdr, &res->state_protect.enforce); + if (status) + return status; + status = decode_op_map(xdr, &res->state_protect.allow); + if (status) + return status; + break; + default: + WARN_ON_ONCE(1); + return -EIO; + } + + /* server_owner4.so_minor_id */ + p = xdr_inline_decode(xdr, 8); + if (unlikely(!p)) + return -EIO; + p = xdr_decode_hyper(p, &res->server_owner->minor_id); + + /* server_owner4.so_major_id */ + status = decode_opaque_inline(xdr, &dummy, &dummy_str); + if (unlikely(status)) + return status; + memcpy(res->server_owner->major_id, dummy_str, dummy); + res->server_owner->major_id_sz = dummy; + + /* server_scope4 */ + status = decode_opaque_inline(xdr, &dummy, &dummy_str); + if (unlikely(status)) + return status; + 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)) + return -EIO; + 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; + memcpy(res->impl_id->domain, dummy_str, dummy); + + /* nii_name */ + status = decode_opaque_inline(xdr, &dummy, &dummy_str); + if (unlikely(status)) + return status; + memcpy(res->impl_id->name, dummy_str, dummy); + + /* nii_date */ + p = xdr_inline_decode(xdr, 12); + if (unlikely(!p)) + return -EIO; + 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; +} + +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)) + return -EIO; + 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)) + return -EIO; + } + return 0; +} + +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_bind_conn_to_session(struct xdr_stream *xdr, + struct nfs41_bind_conn_to_session_res *res) +{ + __be32 *p; + int status; + + status = decode_op_hdr(xdr, OP_BIND_CONN_TO_SESSION); + if (!status) + status = decode_sessionid(xdr, &res->sessionid); + if (unlikely(status)) + return status; + + /* dir flags, rdma mode bool */ + p = xdr_inline_decode(xdr, 8); + if (unlikely(!p)) + return -EIO; + + res->dir = be32_to_cpup(p++); + if (res->dir == 0 || res->dir > NFS4_CDFS4_BOTH) + return -EIO; + if (be32_to_cpup(p) == 0) + res->use_conn_in_rdma_mode = false; + else + res->use_conn_in_rdma_mode = true; + + return 0; +} + +static int decode_create_session(struct xdr_stream *xdr, + struct nfs41_create_session_res *res) +{ + __be32 *p; + int status; + + status = decode_op_hdr(xdr, OP_CREATE_SESSION); + if (!status) + status = decode_sessionid(xdr, &res->sessionid); + if (unlikely(status)) + return status; + + /* seqid, flags */ + p = xdr_inline_decode(xdr, 8); + if (unlikely(!p)) + return -EIO; + res->seqid = be32_to_cpup(p++); + res->flags = be32_to_cpup(p); + + /* Channel attributes */ + status = decode_chan_attrs(xdr, &res->fc_attrs); + if (!status) + status = decode_chan_attrs(xdr, &res->bc_attrs); + return status; +} + +static int decode_destroy_session(struct xdr_stream *xdr, void *dummy) +{ + return decode_op_hdr(xdr, OP_DESTROY_SESSION); +} + +static int decode_destroy_clientid(struct xdr_stream *xdr, void *dummy) +{ + return decode_op_hdr(xdr, OP_DESTROY_CLIENTID); +} + +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_session *session; + struct nfs4_sessionid id; + u32 dummy; + int status; + __be32 *p; + + if (res->sr_slot == NULL) + return 0; + if (!res->sr_slot->table->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; + session = res->sr_slot->table->session; + + if (memcmp(id.data, 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->slot_nr) { + dprintk("%s Invalid slot id\n", __func__); + goto out_err; + } + /* highest slot id */ + res->sr_highest_slotid = be32_to_cpup(p++); + /* target highest slot id */ + res->sr_target_highest_slotid = 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: + status = -EIO; + goto out_err; +#else /* CONFIG_NFS_V4_1 */ + return 0; +#endif /* CONFIG_NFS_V4_1 */ +} + +#if defined(CONFIG_NFS_V4_1) +static int decode_layout_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid) +{ + stateid->type = NFS4_LAYOUT_STATEID_TYPE; + return decode_stateid(xdr, stateid); +} + +static int decode_getdeviceinfo(struct xdr_stream *xdr, + struct nfs4_getdeviceinfo_res *res) +{ + struct pnfs_device *pdev = res->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)) + return -EIO; + 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)) + return -EIO; + 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); + if (xdr_read_pages(xdr, pdev->mincount) != pdev->mincount) + return -EIO; + + /* Parse notification bitmap, verifying that it is zero. */ + p = xdr_inline_decode(xdr, 4); + if (unlikely(!p)) + return -EIO; + len = be32_to_cpup(p); + if (len) { + uint32_t i; + + p = xdr_inline_decode(xdr, 4 * len); + if (unlikely(!p)) + return -EIO; + + res->notification = be32_to_cpup(p++); + for (i = 1; i < len; i++) { + if (be32_to_cpup(p++)) { + dprintk("%s: unsupported notification\n", + __func__); + return -EIO; + } + } + } + return 0; +} + +static int decode_layoutget(struct xdr_stream *xdr, struct rpc_rqst *req, + struct nfs4_layoutget_res *res) +{ + __be32 *p; + int status; + u32 layout_count; + u32 recvd; + + status = decode_op_hdr(xdr, OP_LAYOUTGET); + if (status) + goto out; + p = xdr_inline_decode(xdr, 4); + if (unlikely(!p)) + goto out_overflow; + res->return_on_close = be32_to_cpup(p); + decode_layout_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__); + status = -EINVAL; + goto out; + } + + 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); + + recvd = xdr_read_pages(xdr, res->layoutp->len); + if (res->layoutp->len > recvd) { + dprintk("NFS: server cheating in layoutget reply: " + "layout len %u > recvd %u\n", + res->layoutp->len, recvd); + status = -EINVAL; + goto out; + } + + 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); + } + +out: + res->status = status; + return status; +out_overflow: + status = -EIO; + goto out; +} + +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)) + return -EIO; + res->lrs_present = be32_to_cpup(p); + if (res->lrs_present) + status = decode_layout_stateid(xdr, &res->stateid); + else + nfs4_stateid_copy(&res->stateid, &invalid_stateid); + return status; +} + +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)) + return -EIO; + sizechanged = be32_to_cpup(p); + + if (sizechanged) { + /* throw away new size */ + p = xdr_inline_decode(xdr, 8); + if (unlikely(!p)) + return -EIO; + } + return 0; +} + +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)) + return -EIO; + num_res = be32_to_cpup(p++); + if (num_res != 1) + return -EIO; + + p = xdr_inline_decode(xdr, 4); + if (unlikely(!p)) + return -EIO; + res->status = be32_to_cpup(p++); + + return status; +} + +static int decode_free_stateid(struct xdr_stream *xdr, + struct nfs41_free_stateid_res *res) +{ + res->status = decode_op_hdr(xdr, OP_FREE_STATEID); + return res->status; +} +#else +static inline +int decode_layoutreturn(struct xdr_stream *xdr, + struct nfs4_layoutreturn_res *res) +{ + return 0; +} + +static int decode_layoutget(struct xdr_stream *xdr, struct rpc_rqst *req, + struct nfs4_layoutget_res *res) +{ + return 0; +} + +#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, + void *data) +{ + struct nfs_closeres *res = data; + 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; + if (res->lr_res) { + status = decode_layoutreturn(xdr, res->lr_res); + res->lr_ret = status; + if (status) + goto out; + } + status = decode_open_downgrade(xdr, res); +out: + return status; +} + +/* + * Decode ACCESS response + */ +static int nfs4_xdr_dec_access(struct rpc_rqst *rqstp, struct xdr_stream *xdr, + void *data) +{ + struct nfs4_accessres *res = data; + 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->supported, &res->access); + if (status != 0) + goto out; + if (res->fattr) + 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, + void *data) +{ + struct nfs4_lookup_res *res = data; + 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 LOOKUPP response + */ +static int nfs4_xdr_dec_lookupp(struct rpc_rqst *rqstp, struct xdr_stream *xdr, + void *data) +{ + struct nfs4_lookupp_res *res = data; + 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_lookupp(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, + void *data) +{ + struct nfs4_lookup_res *res = data; + 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, + void *data) +{ + struct nfs_removeres *res = data; + 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); +out: + return status; +} + +/* + * Decode RENAME response + */ +static int nfs4_xdr_dec_rename(struct rpc_rqst *rqstp, struct xdr_stream *xdr, + void *data) +{ + struct nfs_renameres *res = data; + 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); +out: + return status; +} + +/* + * Decode LINK response + */ +static int nfs4_xdr_dec_link(struct rpc_rqst *rqstp, struct xdr_stream *xdr, + void *data) +{ + struct nfs4_link_res *res = data; + 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. + */ + 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, + void *data) +{ + struct nfs4_create_res *res = data; + 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_create(xdr, &res->dir_cinfo); + if (status) + goto out; + status = decode_getfh(xdr, res->fh); + if (status) + goto out; + decode_getfattr(xdr, res->fattr, res->server); +out: + return status; +} + +/* + * Decode SYMLINK response + */ +static int nfs4_xdr_dec_symlink(struct rpc_rqst *rqstp, struct xdr_stream *xdr, + void *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, + void *data) +{ + struct nfs4_getattr_res *res = data; + 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, + const void *data) +{ + const struct nfs_setaclargs *args = data; + 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, + void *data) +{ + struct nfs_setaclres *res = data; + 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, + void *data) +{ + struct nfs_getaclres *res = data; + struct compound_hdr hdr; + int status; + + if (res->acl_scratch != NULL) + xdr_set_scratch_page(xdr, res->acl_scratch); + 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, res->acl_type); + +out: + return status; +} + +/* + * Decode CLOSE response + */ +static int nfs4_xdr_dec_close(struct rpc_rqst *rqstp, struct xdr_stream *xdr, + void *data) +{ + struct nfs_closeres *res = data; + 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; + if (res->lr_res) { + status = decode_layoutreturn(xdr, res->lr_res); + res->lr_ret = status; + if (status) + goto out; + } + if (res->fattr != NULL) { + status = decode_getfattr(xdr, res->fattr, res->server); + if (status != 0) + goto out; + } + status = decode_close(xdr, res); +out: + return status; +} + +/* + * Decode OPEN response + */ +static int nfs4_xdr_dec_open(struct rpc_rqst *rqstp, struct xdr_stream *xdr, + void *data) +{ + struct nfs_openres *res = data; + 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; + status = decode_getfh(xdr, &res->fh); + if (status) + goto out; + if (res->access_request) + decode_access(xdr, &res->access_supported, &res->access_result); + decode_getfattr(xdr, res->f_attr, res->server); + if (res->lg_res) + decode_layoutget(xdr, rqstp, res->lg_res); +out: + return status; +} + +/* + * Decode OPEN_CONFIRM response + */ +static int nfs4_xdr_dec_open_confirm(struct rpc_rqst *rqstp, + struct xdr_stream *xdr, + void *data) +{ + struct nfs_open_confirmres *res = data; + 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, + void *data) +{ + struct nfs_openres *res = data; + 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; + if (res->access_request) + decode_access(xdr, &res->access_supported, &res->access_result); + decode_getfattr(xdr, res->f_attr, res->server); + if (res->lg_res) + decode_layoutget(xdr, rqstp, res->lg_res); +out: + return status; +} + +/* + * Decode SETATTR response + */ +static int nfs4_xdr_dec_setattr(struct rpc_rqst *rqstp, + struct xdr_stream *xdr, + void *data) +{ + struct nfs_setattrres *res = data; + 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, + void *data) +{ + struct nfs_lock_res *res = data; + 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, + void *data) +{ + struct nfs_lockt_res *res = data; + 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, + void *data) +{ + struct nfs_locku_res *res = data; + 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, + void *data) +{ + struct nfs4_readlink_res *res = data; + 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, + void *data) +{ + struct nfs4_readdir_res *res = data; + 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, + void *data) +{ + struct nfs_pgio_res *res = data; + struct compound_hdr hdr; + int status; + + status = decode_compound_hdr(xdr, &hdr); + res->op_status = hdr.status; + 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, + void *data) +{ + struct nfs_pgio_res *res = data; + struct compound_hdr hdr; + int status; + + status = decode_compound_hdr(xdr, &hdr); + res->op_status = hdr.status; + 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, + void *data) +{ + struct nfs_commitres *res = data; + struct compound_hdr hdr; + int status; + + status = decode_compound_hdr(xdr, &hdr); + res->op_status = hdr.status; + 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); +out: + return status; +} + +/* + * Decode FSINFO response + */ +static int nfs4_xdr_dec_fsinfo(struct rpc_rqst *req, struct xdr_stream *xdr, + void *data) +{ + struct nfs4_fsinfo_res *res = data; + 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, + void *data) +{ + struct nfs4_pathconf_res *res = data; + 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, + void *data) +{ + struct nfs4_statfs_res *res = data; + 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, + void *data) +{ + struct nfs4_server_caps_res *res = data; + 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, + void *data) +{ + struct nfs4_setclientid_res *res = data; + 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, + void *data) +{ + struct compound_hdr hdr; + int status; + + status = decode_compound_hdr(xdr, &hdr); + if (!status) + status = decode_setclientid_confirm(xdr); + return status; +} + +/* + * Decode DELEGRETURN response + */ +static int nfs4_xdr_dec_delegreturn(struct rpc_rqst *rqstp, + struct xdr_stream *xdr, + void *data) +{ + struct nfs4_delegreturnres *res = data; + 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; + if (res->lr_res) { + status = decode_layoutreturn(xdr, res->lr_res); + res->lr_ret = status; + if (status) + goto out; + } + if (res->fattr) { + status = decode_getfattr(xdr, res->fattr, res->server); + if (status != 0) + goto out; + } + status = decode_delegreturn(xdr); +out: + return status; +} + +/* + * Decode FS_LOCATIONS response + */ +static int nfs4_xdr_dec_fs_locations(struct rpc_rqst *req, + struct xdr_stream *xdr, + void *data) +{ + struct nfs4_fs_locations_res *res = data; + 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; + if (res->migration) { + xdr_enter_page(xdr, PAGE_SIZE); + status = decode_getfattr_generic(xdr, + res->fs_locations->fattr, + NULL, res->fs_locations, + res->fs_locations->server); + if (status) + goto out; + if (res->renew) + status = decode_renew(xdr); + } else { + 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, + void *data) +{ + struct nfs4_secinfo_res *res = data; + 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; +} + +/* + * Decode FSID_PRESENT response + */ +static int nfs4_xdr_dec_fsid_present(struct rpc_rqst *rqstp, + struct xdr_stream *xdr, + void *data) +{ + struct nfs4_fsid_present_res *res = data; + 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_getfh(xdr, res->fh); + if (status) + goto out; + if (res->renew) + status = decode_renew(xdr); +out: + return status; +} + +#if defined(CONFIG_NFS_V4_1) +/* + * Decode BIND_CONN_TO_SESSION response + */ +static int nfs4_xdr_dec_bind_conn_to_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_bind_conn_to_session(xdr, res); + return status; +} + +/* + * 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, + void *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 DESTROY_CLIENTID response + */ +static int nfs4_xdr_dec_destroy_clientid(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_clientid(xdr, res); + return status; +} + +/* + * Decode SEQUENCE response + */ +static int nfs4_xdr_dec_sequence(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_sequence(xdr, res, rqstp); + return status; +} + +#endif + +/* + * Decode GET_LEASE_TIME response + */ +static int nfs4_xdr_dec_get_lease_time(struct rpc_rqst *rqstp, + struct xdr_stream *xdr, + void *data) +{ + struct nfs4_get_lease_time_res *res = data; + 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; +} + +#ifdef CONFIG_NFS_V4_1 + +/* + * Decode RECLAIM_COMPLETE response + */ +static int nfs4_xdr_dec_reclaim_complete(struct rpc_rqst *rqstp, + struct xdr_stream *xdr, + void *data) +{ + struct nfs41_reclaim_complete_res *res = data; + 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, NULL); + return status; +} + +/* + * Decode GETDEVINFO response + */ +static int nfs4_xdr_dec_getdeviceinfo(struct rpc_rqst *rqstp, + struct xdr_stream *xdr, + void *data) +{ + struct nfs4_getdeviceinfo_res *res = data; + 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); +out: + return status; +} + +/* + * Decode LAYOUTGET response + */ +static int nfs4_xdr_dec_layoutget(struct rpc_rqst *rqstp, + struct xdr_stream *xdr, + void *data) +{ + struct nfs4_layoutget_res *res = data; + 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, + void *data) +{ + struct nfs4_layoutreturn_res *res = data; + 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, + void *data) +{ + struct nfs4_layoutcommit_res *res = data; + 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, + void *data) +{ + struct nfs4_secinfo_res *res = data; + 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, + void *data) +{ + struct nfs41_test_stateid_res *res = data; + 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, + void *data) +{ + struct nfs41_free_stateid_res *res = data; + 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, + bool plus) +{ + unsigned int savep; + uint32_t bitmap[3] = {0}; + uint32_t len; + uint64_t new_cookie; + __be32 *p = xdr_inline_decode(xdr, 4); + if (unlikely(!p)) + return -EAGAIN; + if (*p == xdr_zero) { + p = xdr_inline_decode(xdr, 4); + if (unlikely(!p)) + return -EAGAIN; + if (*p == xdr_zero) + return -EAGAIN; + entry->eof = 1; + return -EBADCOOKIE; + } + + p = xdr_inline_decode(xdr, 12); + if (unlikely(!p)) + return -EAGAIN; + p = xdr_decode_hyper(p, &new_cookie); + entry->len = be32_to_cpup(p); + + p = xdr_inline_decode(xdr, entry->len); + if (unlikely(!p)) + return -EAGAIN; + 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) + return -EAGAIN; + + if (decode_attr_length(xdr, &len, &savep) < 0) + return -EAGAIN; + + if (decode_getfattr_attrs(xdr, bitmap, entry->fattr, entry->fh, + NULL, entry->server) < 0) + return -EAGAIN; + 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); + + entry->cookie = new_cookie; + + return 0; +} + +/* + * 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 }, + { NFS4ERR_NOXATTR, -ENODATA }, + { NFS4ERR_XATTR2BIG, -E2BIG }, + { -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; +} + +#ifdef CONFIG_NFS_V4_2 +#include "nfs42xdr.c" +#endif /* CONFIG_NFS_V4_2 */ + +#define PROC(proc, argtype, restype) \ +[NFSPROC4_CLNT_##proc] = { \ + .p_proc = NFSPROC4_COMPOUND, \ + .p_encode = nfs4_xdr_##argtype, \ + .p_decode = nfs4_xdr_##restype, \ + .p_arglen = NFS4_##argtype##_sz, \ + .p_replen = NFS4_##restype##_sz, \ + .p_statidx = NFSPROC4_CLNT_##proc, \ + .p_name = #proc, \ +} + +#define STUB(proc) \ +[NFSPROC4_CLNT_##proc] = { \ + .p_name = #proc, \ +} + +#if defined(CONFIG_NFS_V4_1) +#define PROC41(proc, argtype, restype) \ + PROC(proc, argtype, restype) +#else +#define PROC41(proc, argtype, restype) \ + STUB(proc) +#endif + +#if defined(CONFIG_NFS_V4_2) +#define PROC42(proc, argtype, restype) \ + PROC(proc, argtype, restype) +#else +#define PROC42(proc, argtype, restype) \ + STUB(proc) +#endif + +const 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), + PROC(FSID_PRESENT, enc_fsid_present, dec_fsid_present), + PROC41(EXCHANGE_ID, enc_exchange_id, dec_exchange_id), + PROC41(CREATE_SESSION, enc_create_session, dec_create_session), + PROC41(DESTROY_SESSION, enc_destroy_session, dec_destroy_session), + PROC41(SEQUENCE, enc_sequence, dec_sequence), + PROC(GET_LEASE_TIME, enc_get_lease_time, dec_get_lease_time), + PROC41(RECLAIM_COMPLETE,enc_reclaim_complete, dec_reclaim_complete), + PROC41(GETDEVICEINFO, enc_getdeviceinfo, dec_getdeviceinfo), + PROC41(LAYOUTGET, enc_layoutget, dec_layoutget), + PROC41(LAYOUTCOMMIT, enc_layoutcommit, dec_layoutcommit), + PROC41(LAYOUTRETURN, enc_layoutreturn, dec_layoutreturn), + PROC41(SECINFO_NO_NAME, enc_secinfo_no_name, dec_secinfo_no_name), + PROC41(TEST_STATEID, enc_test_stateid, dec_test_stateid), + PROC41(FREE_STATEID, enc_free_stateid, dec_free_stateid), + STUB(GETDEVICELIST), + PROC41(BIND_CONN_TO_SESSION, + enc_bind_conn_to_session, dec_bind_conn_to_session), + PROC41(DESTROY_CLIENTID,enc_destroy_clientid, dec_destroy_clientid), + PROC42(SEEK, enc_seek, dec_seek), + PROC42(ALLOCATE, enc_allocate, dec_allocate), + PROC42(DEALLOCATE, enc_deallocate, dec_deallocate), + PROC42(LAYOUTSTATS, enc_layoutstats, dec_layoutstats), + PROC42(CLONE, enc_clone, dec_clone), + PROC42(COPY, enc_copy, dec_copy), + PROC42(OFFLOAD_CANCEL, enc_offload_cancel, dec_offload_cancel), + PROC42(COPY_NOTIFY, enc_copy_notify, dec_copy_notify), + PROC(LOOKUPP, enc_lookupp, dec_lookupp), + PROC42(LAYOUTERROR, enc_layouterror, dec_layouterror), + PROC42(GETXATTR, enc_getxattr, dec_getxattr), + PROC42(SETXATTR, enc_setxattr, dec_setxattr), + PROC42(LISTXATTRS, enc_listxattrs, dec_listxattrs), + PROC42(REMOVEXATTR, enc_removexattr, dec_removexattr), + PROC42(READ_PLUS, enc_read_plus, dec_read_plus), +}; + +static unsigned int nfs_version4_counts[ARRAY_SIZE(nfs4_procedures)]; +const struct rpc_version nfs_version4 = { + .number = 4, + .nrprocs = ARRAY_SIZE(nfs4_procedures), + .procs = nfs4_procedures, + .counts = nfs_version4_counts, +}; |