/* * fs/nfs/nfs4xdr.c * * Client-side XDR for NFSv4. * * Copyright (c) 2002 The Regents of the University of Michigan. * All rights reserved. * * Kendrick Smith * Andy Adamson * * 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 #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include "nfs4_fs.h" #define NFSDBG_FACILITY NFSDBG_XDR /* Mapping from NFS error code to "errno" error code. */ #define errno_NFSERR_IO EIO static int nfs4_stat_to_errno(int); /* NFSv4 COMPOUND tags are only wanted for debugging purposes */ #ifdef DEBUG #define NFS4_MAXTAGLEN 20 #else #define NFS4_MAXTAGLEN 0 #endif /* lock,open owner id: * we currently use size 2 (u64) out of (NFS4_OPAQUE_LIMIT >> 2) */ #define open_owner_id_maxsz (1 + 4) #define lock_owner_id_maxsz (1 + 4) #define decode_lockowner_maxsz (1 + XDR_QUADLEN(IDMAP_NAMESZ)) #define compound_encode_hdr_maxsz (3 + (NFS4_MAXTAGLEN >> 2)) #define compound_decode_hdr_maxsz (3 + (NFS4_MAXTAGLEN >> 2)) #define op_encode_hdr_maxsz (1) #define op_decode_hdr_maxsz (2) #define encode_stateid_maxsz (XDR_QUADLEN(NFS4_STATEID_SIZE)) #define decode_stateid_maxsz (XDR_QUADLEN(NFS4_STATEID_SIZE)) #define encode_verifier_maxsz (XDR_QUADLEN(NFS4_VERIFIER_SIZE)) #define decode_verifier_maxsz (XDR_QUADLEN(NFS4_VERIFIER_SIZE)) #define encode_putfh_maxsz (op_encode_hdr_maxsz + 1 + \ (NFS4_FHSIZE >> 2)) #define decode_putfh_maxsz (op_decode_hdr_maxsz) #define encode_putrootfh_maxsz (op_encode_hdr_maxsz) #define decode_putrootfh_maxsz (op_decode_hdr_maxsz) #define encode_getfh_maxsz (op_encode_hdr_maxsz) #define decode_getfh_maxsz (op_decode_hdr_maxsz + 1 + \ ((3+NFS4_FHSIZE) >> 2)) #define nfs4_fattr_bitmap_maxsz 3 #define encode_getattr_maxsz (op_encode_hdr_maxsz + nfs4_fattr_bitmap_maxsz) #define nfs4_name_maxsz (1 + ((3 + NFS4_MAXNAMLEN) >> 2)) #define nfs4_path_maxsz (1 + ((3 + NFS4_MAXPATHLEN) >> 2)) #define nfs4_owner_maxsz (1 + XDR_QUADLEN(IDMAP_NAMESZ)) #define nfs4_group_maxsz (1 + XDR_QUADLEN(IDMAP_NAMESZ)) /* This is based on getfattr, which uses the most attributes: */ #define nfs4_fattr_value_maxsz (1 + (1 + 2 + 2 + 4 + 2 + 1 + 1 + 2 + 2 + \ 3 + 3 + 3 + nfs4_owner_maxsz + nfs4_group_maxsz)) #define nfs4_fattr_maxsz (nfs4_fattr_bitmap_maxsz + \ nfs4_fattr_value_maxsz) #define decode_getattr_maxsz (op_decode_hdr_maxsz + nfs4_fattr_maxsz) #define encode_attrs_maxsz (nfs4_fattr_bitmap_maxsz + \ 1 + 2 + 1 + \ nfs4_owner_maxsz + \ nfs4_group_maxsz + \ 4 + 4) #define encode_savefh_maxsz (op_encode_hdr_maxsz) #define decode_savefh_maxsz (op_decode_hdr_maxsz) #define encode_restorefh_maxsz (op_encode_hdr_maxsz) #define decode_restorefh_maxsz (op_decode_hdr_maxsz) #define encode_fsinfo_maxsz (encode_getattr_maxsz) #define decode_fsinfo_maxsz (op_decode_hdr_maxsz + 11) #define encode_renew_maxsz (op_encode_hdr_maxsz + 3) #define decode_renew_maxsz (op_decode_hdr_maxsz) #define encode_setclientid_maxsz \ (op_encode_hdr_maxsz + \ XDR_QUADLEN(NFS4_VERIFIER_SIZE) + \ XDR_QUADLEN(NFS4_SETCLIENTID_NAMELEN) + \ 1 /* sc_prog */ + \ XDR_QUADLEN(RPCBIND_MAXNETIDLEN) + \ XDR_QUADLEN(RPCBIND_MAXUADDRLEN) + \ 1) /* sc_cb_ident */ #define decode_setclientid_maxsz \ (op_decode_hdr_maxsz + \ 2 + \ 1024) /* large value for CLID_INUSE */ #define encode_setclientid_confirm_maxsz \ (op_encode_hdr_maxsz + \ 3 + (NFS4_VERIFIER_SIZE >> 2)) #define decode_setclientid_confirm_maxsz \ (op_decode_hdr_maxsz) #define encode_lookup_maxsz (op_encode_hdr_maxsz + nfs4_name_maxsz) #define decode_lookup_maxsz (op_decode_hdr_maxsz) #define encode_share_access_maxsz \ (2) #define encode_createmode_maxsz (1 + encode_attrs_maxsz) #define encode_opentype_maxsz (1 + encode_createmode_maxsz) #define encode_claim_null_maxsz (1 + nfs4_name_maxsz) #define encode_open_maxsz (op_encode_hdr_maxsz + \ 2 + encode_share_access_maxsz + 2 + \ open_owner_id_maxsz + \ encode_opentype_maxsz + \ encode_claim_null_maxsz) #define decode_ace_maxsz (3 + nfs4_owner_maxsz) #define decode_delegation_maxsz (1 + decode_stateid_maxsz + 1 + \ decode_ace_maxsz) #define decode_change_info_maxsz (5) #define decode_open_maxsz (op_decode_hdr_maxsz + \ decode_stateid_maxsz + \ decode_change_info_maxsz + 1 + \ nfs4_fattr_bitmap_maxsz + \ decode_delegation_maxsz) #define encode_open_confirm_maxsz \ (op_encode_hdr_maxsz + \ encode_stateid_maxsz + 1) #define decode_open_confirm_maxsz \ (op_decode_hdr_maxsz + \ decode_stateid_maxsz) #define encode_open_downgrade_maxsz \ (op_encode_hdr_maxsz + \ encode_stateid_maxsz + 1 + \ encode_share_access_maxsz) #define decode_open_downgrade_maxsz \ (op_decode_hdr_maxsz + \ decode_stateid_maxsz) #define encode_close_maxsz (op_encode_hdr_maxsz + \ 1 + encode_stateid_maxsz) #define decode_close_maxsz (op_decode_hdr_maxsz + \ decode_stateid_maxsz) #define encode_setattr_maxsz (op_encode_hdr_maxsz + \ encode_stateid_maxsz + \ encode_attrs_maxsz) #define decode_setattr_maxsz (op_decode_hdr_maxsz + \ nfs4_fattr_bitmap_maxsz) #define encode_read_maxsz (op_encode_hdr_maxsz + \ encode_stateid_maxsz + 3) #define decode_read_maxsz (op_decode_hdr_maxsz + 2) #define encode_readdir_maxsz (op_encode_hdr_maxsz + \ 2 + encode_verifier_maxsz + 5) #define decode_readdir_maxsz (op_decode_hdr_maxsz + \ decode_verifier_maxsz) #define encode_readlink_maxsz (op_encode_hdr_maxsz) #define decode_readlink_maxsz (op_decode_hdr_maxsz + 1) #define encode_write_maxsz (op_encode_hdr_maxsz + \ encode_stateid_maxsz + 4) #define decode_write_maxsz (op_decode_hdr_maxsz + \ 2 + decode_verifier_maxsz) #define encode_commit_maxsz (op_encode_hdr_maxsz + 3) #define decode_commit_maxsz (op_decode_hdr_maxsz + \ decode_verifier_maxsz) #define encode_remove_maxsz (op_encode_hdr_maxsz + \ nfs4_name_maxsz) #define decode_remove_maxsz (op_decode_hdr_maxsz + \ decode_change_info_maxsz) #define encode_rename_maxsz (op_encode_hdr_maxsz + \ 2 * nfs4_name_maxsz) #define decode_rename_maxsz (op_decode_hdr_maxsz + \ decode_change_info_maxsz + \ decode_change_info_maxsz) #define encode_link_maxsz (op_encode_hdr_maxsz + \ nfs4_name_maxsz) #define decode_link_maxsz (op_decode_hdr_maxsz + decode_change_info_maxsz) #define encode_lock_maxsz (op_encode_hdr_maxsz + \ 7 + \ 1 + encode_stateid_maxsz + 8) #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 + 12) #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_access_maxsz (op_encode_hdr_maxsz + 1) #define decode_access_maxsz (op_decode_hdr_maxsz + 2) #define encode_symlink_maxsz (op_encode_hdr_maxsz + \ 1 + nfs4_name_maxsz + \ 1 + \ nfs4_fattr_maxsz) #define decode_symlink_maxsz (op_decode_hdr_maxsz + 8) #define encode_create_maxsz (op_encode_hdr_maxsz + \ 1 + 2 + nfs4_name_maxsz + \ encode_attrs_maxsz) #define decode_create_maxsz (op_decode_hdr_maxsz + \ decode_change_info_maxsz + \ nfs4_fattr_bitmap_maxsz) #define encode_statfs_maxsz (encode_getattr_maxsz) #define decode_statfs_maxsz (decode_getattr_maxsz) #define encode_delegreturn_maxsz (op_encode_hdr_maxsz + 4) #define decode_delegreturn_maxsz (op_decode_hdr_maxsz) #define encode_getacl_maxsz (encode_getattr_maxsz) #define decode_getacl_maxsz (op_decode_hdr_maxsz + \ nfs4_fattr_bitmap_maxsz + 1) #define encode_setacl_maxsz (op_encode_hdr_maxsz + \ encode_stateid_maxsz + 3) #define decode_setacl_maxsz (decode_setattr_maxsz) #define encode_fs_locations_maxsz \ (encode_getattr_maxsz) #define decode_fs_locations_maxsz \ (0) #if defined(CONFIG_NFS_V4_1) #define NFS4_MAX_MACHINE_NAME_LEN (64) #define encode_exchange_id_maxsz (op_encode_hdr_maxsz + \ encode_verifier_maxsz + \ 1 /* co_ownerid.len */ + \ XDR_QUADLEN(NFS4_EXCHANGE_ID_LEN) + \ 1 /* flags */ + \ 1 /* spa_how */ + \ 0 /* SP4_NONE (for now) */ + \ 1 /* zero implemetation id array */) #define decode_exchange_id_maxsz (op_decode_hdr_maxsz + \ 2 /* eir_clientid */ + \ 1 /* eir_sequenceid */ + \ 1 /* eir_flags */ + \ 1 /* spr_how */ + \ 0 /* SP4_NONE (for now) */ + \ 2 /* eir_server_owner.so_minor_id */ + \ /* eir_server_owner.so_major_id<> */ \ XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 + \ /* eir_server_scope<> */ \ XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 + \ 1 /* eir_server_impl_id array length */ + \ 0 /* ignored eir_server_impl_id contents */) #define encode_channel_attrs_maxsz (6 + 1 /* ca_rdma_ird.len (0) */) #define decode_channel_attrs_maxsz (6 + \ 1 /* ca_rdma_ird.len */ + \ 1 /* ca_rdma_ird */) #define encode_create_session_maxsz (op_encode_hdr_maxsz + \ 2 /* csa_clientid */ + \ 1 /* csa_sequence */ + \ 1 /* csa_flags */ + \ encode_channel_attrs_maxsz + \ encode_channel_attrs_maxsz + \ 1 /* csa_cb_program */ + \ 1 /* csa_sec_parms.len (1) */ + \ 1 /* cb_secflavor (AUTH_SYS) */ + \ 1 /* stamp */ + \ 1 /* machinename.len */ + \ XDR_QUADLEN(NFS4_MAX_MACHINE_NAME_LEN) + \ 1 /* uid */ + \ 1 /* gid */ + \ 1 /* gids.len (0) */) #define decode_create_session_maxsz (op_decode_hdr_maxsz + \ XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \ 1 /* csr_sequence */ + \ 1 /* csr_flags */ + \ decode_channel_attrs_maxsz + \ decode_channel_attrs_maxsz) #define encode_destroy_session_maxsz (op_encode_hdr_maxsz + 4) #define decode_destroy_session_maxsz (op_decode_hdr_maxsz) #define encode_sequence_maxsz (op_encode_hdr_maxsz + \ XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + 4) #define decode_sequence_maxsz (op_decode_hdr_maxsz + \ XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + 5) #else /* CONFIG_NFS_V4_1 */ #define encode_sequence_maxsz 0 #define decode_sequence_maxsz 0 #endif /* CONFIG_NFS_V4_1 */ #define NFS4_enc_compound_sz (1024) /* XXX: large enough? */ #define NFS4_dec_compound_sz (1024) /* XXX: large enough? */ #define NFS4_enc_read_sz (compound_encode_hdr_maxsz + \ encode_sequence_maxsz + \ encode_putfh_maxsz + \ encode_read_maxsz) #define NFS4_dec_read_sz (compound_decode_hdr_maxsz + \ decode_sequence_maxsz + \ decode_putfh_maxsz + \ decode_read_maxsz) #define NFS4_enc_readlink_sz (compound_encode_hdr_maxsz + \ encode_sequence_maxsz + \ encode_putfh_maxsz + \ encode_readlink_maxsz) #define NFS4_dec_readlink_sz (compound_decode_hdr_maxsz + \ decode_sequence_maxsz + \ decode_putfh_maxsz + \ decode_readlink_maxsz) #define NFS4_enc_readdir_sz (compound_encode_hdr_maxsz + \ encode_sequence_maxsz + \ encode_putfh_maxsz + \ encode_readdir_maxsz) #define NFS4_dec_readdir_sz (compound_decode_hdr_maxsz + \ decode_sequence_maxsz + \ decode_putfh_maxsz + \ decode_readdir_maxsz) #define NFS4_enc_write_sz (compound_encode_hdr_maxsz + \ encode_sequence_maxsz + \ encode_putfh_maxsz + \ encode_write_maxsz + \ encode_getattr_maxsz) #define NFS4_dec_write_sz (compound_decode_hdr_maxsz + \ decode_sequence_maxsz + \ decode_putfh_maxsz + \ decode_write_maxsz + \ decode_getattr_maxsz) #define NFS4_enc_commit_sz (compound_encode_hdr_maxsz + \ encode_sequence_maxsz + \ encode_putfh_maxsz + \ encode_commit_maxsz + \ encode_getattr_maxsz) #define NFS4_dec_commit_sz (compound_decode_hdr_maxsz + \ decode_sequence_maxsz + \ decode_putfh_maxsz + \ decode_commit_maxsz + \ decode_getattr_maxsz) #define NFS4_enc_open_sz (compound_encode_hdr_maxsz + \ encode_sequence_maxsz + \ encode_putfh_maxsz + \ encode_savefh_maxsz + \ encode_open_maxsz + \ encode_getfh_maxsz + \ encode_getattr_maxsz + \ encode_restorefh_maxsz + \ encode_getattr_maxsz) #define NFS4_dec_open_sz (compound_decode_hdr_maxsz + \ decode_sequence_maxsz + \ decode_putfh_maxsz + \ decode_savefh_maxsz + \ decode_open_maxsz + \ decode_getfh_maxsz + \ decode_getattr_maxsz + \ decode_restorefh_maxsz + \ decode_getattr_maxsz) #define NFS4_enc_open_confirm_sz \ (compound_encode_hdr_maxsz + \ encode_putfh_maxsz + \ encode_open_confirm_maxsz) #define NFS4_dec_open_confirm_sz \ (compound_decode_hdr_maxsz + \ decode_putfh_maxsz + \ decode_open_confirm_maxsz) #define NFS4_enc_open_noattr_sz (compound_encode_hdr_maxsz + \ encode_sequence_maxsz + \ encode_putfh_maxsz + \ encode_open_maxsz + \ encode_getattr_maxsz) #define NFS4_dec_open_noattr_sz (compound_decode_hdr_maxsz + \ decode_sequence_maxsz + \ decode_putfh_maxsz + \ decode_open_maxsz + \ decode_getattr_maxsz) #define NFS4_enc_open_downgrade_sz \ (compound_encode_hdr_maxsz + \ encode_sequence_maxsz + \ encode_putfh_maxsz + \ encode_open_downgrade_maxsz + \ encode_getattr_maxsz) #define NFS4_dec_open_downgrade_sz \ (compound_decode_hdr_maxsz + \ decode_sequence_maxsz + \ decode_putfh_maxsz + \ decode_open_downgrade_maxsz + \ decode_getattr_maxsz) #define NFS4_enc_close_sz (compound_encode_hdr_maxsz + \ encode_sequence_maxsz + \ encode_putfh_maxsz + \ encode_close_maxsz + \ encode_getattr_maxsz) #define NFS4_dec_close_sz (compound_decode_hdr_maxsz + \ decode_sequence_maxsz + \ decode_putfh_maxsz + \ decode_close_maxsz + \ decode_getattr_maxsz) #define NFS4_enc_setattr_sz (compound_encode_hdr_maxsz + \ encode_sequence_maxsz + \ encode_putfh_maxsz + \ encode_setattr_maxsz + \ encode_getattr_maxsz) #define NFS4_dec_setattr_sz (compound_decode_hdr_maxsz + \ decode_sequence_maxsz + \ decode_putfh_maxsz + \ decode_setattr_maxsz + \ decode_getattr_maxsz) #define NFS4_enc_fsinfo_sz (compound_encode_hdr_maxsz + \ encode_sequence_maxsz + \ encode_putfh_maxsz + \ encode_fsinfo_maxsz) #define NFS4_dec_fsinfo_sz (compound_decode_hdr_maxsz + \ decode_sequence_maxsz + \ decode_putfh_maxsz + \ decode_fsinfo_maxsz) #define NFS4_enc_renew_sz (compound_encode_hdr_maxsz + \ encode_renew_maxsz) #define NFS4_dec_renew_sz (compound_decode_hdr_maxsz + \ decode_renew_maxsz) #define NFS4_enc_setclientid_sz (compound_encode_hdr_maxsz + \ encode_setclientid_maxsz) #define NFS4_dec_setclientid_sz (compound_decode_hdr_maxsz + \ decode_setclientid_maxsz) #define NFS4_enc_setclientid_confirm_sz \ (compound_encode_hdr_maxsz + \ encode_setclientid_confirm_maxsz + \ encode_putrootfh_maxsz + \ encode_fsinfo_maxsz) #define NFS4_dec_setclientid_confirm_sz \ (compound_decode_hdr_maxsz + \ decode_setclientid_confirm_maxsz + \ decode_putrootfh_maxsz + \ decode_fsinfo_maxsz) #define NFS4_enc_lock_sz (compound_encode_hdr_maxsz + \ encode_sequence_maxsz + \ encode_putfh_maxsz + \ encode_lock_maxsz) #define NFS4_dec_lock_sz (compound_decode_hdr_maxsz + \ decode_sequence_maxsz + \ decode_putfh_maxsz + \ decode_lock_maxsz) #define NFS4_enc_lockt_sz (compound_encode_hdr_maxsz + \ encode_sequence_maxsz + \ encode_putfh_maxsz + \ encode_lockt_maxsz) #define NFS4_dec_lockt_sz (compound_decode_hdr_maxsz + \ decode_sequence_maxsz + \ decode_putfh_maxsz + \ decode_lockt_maxsz) #define NFS4_enc_locku_sz (compound_encode_hdr_maxsz + \ encode_sequence_maxsz + \ encode_putfh_maxsz + \ encode_locku_maxsz) #define NFS4_dec_locku_sz (compound_decode_hdr_maxsz + \ decode_sequence_maxsz + \ decode_putfh_maxsz + \ decode_locku_maxsz) #define NFS4_enc_access_sz (compound_encode_hdr_maxsz + \ encode_sequence_maxsz + \ encode_putfh_maxsz + \ encode_access_maxsz + \ encode_getattr_maxsz) #define NFS4_dec_access_sz (compound_decode_hdr_maxsz + \ decode_sequence_maxsz + \ decode_putfh_maxsz + \ decode_access_maxsz + \ decode_getattr_maxsz) #define NFS4_enc_getattr_sz (compound_encode_hdr_maxsz + \ encode_sequence_maxsz + \ encode_putfh_maxsz + \ encode_getattr_maxsz) #define NFS4_dec_getattr_sz (compound_decode_hdr_maxsz + \ decode_sequence_maxsz + \ decode_putfh_maxsz + \ decode_getattr_maxsz) #define NFS4_enc_lookup_sz (compound_encode_hdr_maxsz + \ encode_sequence_maxsz + \ encode_putfh_maxsz + \ encode_lookup_maxsz + \ encode_getattr_maxsz + \ encode_getfh_maxsz) #define NFS4_dec_lookup_sz (compound_decode_hdr_maxsz + \ decode_sequence_maxsz + \ decode_putfh_maxsz + \ decode_lookup_maxsz + \ decode_getattr_maxsz + \ decode_getfh_maxsz) #define NFS4_enc_lookup_root_sz (compound_encode_hdr_maxsz + \ encode_sequence_maxsz + \ encode_putrootfh_maxsz + \ encode_getattr_maxsz + \ encode_getfh_maxsz) #define NFS4_dec_lookup_root_sz (compound_decode_hdr_maxsz + \ decode_sequence_maxsz + \ decode_putrootfh_maxsz + \ decode_getattr_maxsz + \ decode_getfh_maxsz) #define NFS4_enc_remove_sz (compound_encode_hdr_maxsz + \ encode_sequence_maxsz + \ encode_putfh_maxsz + \ encode_remove_maxsz + \ encode_getattr_maxsz) #define NFS4_dec_remove_sz (compound_decode_hdr_maxsz + \ decode_sequence_maxsz + \ decode_putfh_maxsz + \ decode_remove_maxsz + \ decode_getattr_maxsz) #define NFS4_enc_rename_sz (compound_encode_hdr_maxsz + \ encode_sequence_maxsz + \ encode_putfh_maxsz + \ encode_savefh_maxsz + \ encode_putfh_maxsz + \ encode_rename_maxsz + \ encode_getattr_maxsz + \ encode_restorefh_maxsz + \ encode_getattr_maxsz) #define NFS4_dec_rename_sz (compound_decode_hdr_maxsz + \ decode_sequence_maxsz + \ decode_putfh_maxsz + \ decode_savefh_maxsz + \ decode_putfh_maxsz + \ decode_rename_maxsz + \ decode_getattr_maxsz + \ decode_restorefh_maxsz + \ decode_getattr_maxsz) #define NFS4_enc_link_sz (compound_encode_hdr_maxsz + \ encode_sequence_maxsz + \ encode_putfh_maxsz + \ encode_savefh_maxsz + \ encode_putfh_maxsz + \ encode_link_maxsz + \ decode_getattr_maxsz + \ encode_restorefh_maxsz + \ decode_getattr_maxsz) #define NFS4_dec_link_sz (compound_decode_hdr_maxsz + \ decode_sequence_maxsz + \ decode_putfh_maxsz + \ decode_savefh_maxsz + \ decode_putfh_maxsz + \ decode_link_maxsz + \ decode_getattr_maxsz + \ decode_restorefh_maxsz + \ decode_getattr_maxsz) #define NFS4_enc_symlink_sz (compound_encode_hdr_maxsz + \ encode_sequence_maxsz + \ encode_putfh_maxsz + \ encode_symlink_maxsz + \ encode_getattr_maxsz + \ encode_getfh_maxsz) #define NFS4_dec_symlink_sz (compound_decode_hdr_maxsz + \ decode_sequence_maxsz + \ decode_putfh_maxsz + \ decode_symlink_maxsz + \ decode_getattr_maxsz + \ decode_getfh_maxsz) #define NFS4_enc_create_sz (compound_encode_hdr_maxsz + \ encode_sequence_maxsz + \ encode_putfh_maxsz + \ encode_savefh_maxsz + \ encode_create_maxsz + \ encode_getfh_maxsz + \ encode_getattr_maxsz + \ encode_restorefh_maxsz + \ encode_getattr_maxsz) #define NFS4_dec_create_sz (compound_decode_hdr_maxsz + \ decode_sequence_maxsz + \ decode_putfh_maxsz + \ decode_savefh_maxsz + \ decode_create_maxsz + \ decode_getfh_maxsz + \ decode_getattr_maxsz + \ decode_restorefh_maxsz + \ decode_getattr_maxsz) #define NFS4_enc_pathconf_sz (compound_encode_hdr_maxsz + \ encode_sequence_maxsz + \ encode_putfh_maxsz + \ encode_getattr_maxsz) #define NFS4_dec_pathconf_sz (compound_decode_hdr_maxsz + \ decode_sequence_maxsz + \ decode_putfh_maxsz + \ decode_getattr_maxsz) #define NFS4_enc_statfs_sz (compound_encode_hdr_maxsz + \ encode_sequence_maxsz + \ encode_putfh_maxsz + \ encode_statfs_maxsz) #define NFS4_dec_statfs_sz (compound_decode_hdr_maxsz + \ decode_sequence_maxsz + \ decode_putfh_maxsz + \ decode_statfs_maxsz) #define NFS4_enc_server_caps_sz (compound_encode_hdr_maxsz + \ encode_sequence_maxsz + \ encode_putfh_maxsz + \ encode_getattr_maxsz) #define NFS4_dec_server_caps_sz (compound_decode_hdr_maxsz + \ decode_sequence_maxsz + \ decode_putfh_maxsz + \ decode_getattr_maxsz) #define NFS4_enc_delegreturn_sz (compound_encode_hdr_maxsz + \ encode_sequence_maxsz + \ encode_putfh_maxsz + \ encode_delegreturn_maxsz + \ encode_getattr_maxsz) #define NFS4_dec_delegreturn_sz (compound_decode_hdr_maxsz + \ decode_sequence_maxsz + \ decode_delegreturn_maxsz + \ decode_getattr_maxsz) #define NFS4_enc_getacl_sz (compound_encode_hdr_maxsz + \ encode_sequence_maxsz + \ encode_putfh_maxsz + \ encode_getacl_maxsz) #define NFS4_dec_getacl_sz (compound_decode_hdr_maxsz + \ decode_sequence_maxsz + \ decode_putfh_maxsz + \ decode_getacl_maxsz) #define NFS4_enc_setacl_sz (compound_encode_hdr_maxsz + \ encode_sequence_maxsz + \ encode_putfh_maxsz + \ encode_setacl_maxsz) #define NFS4_dec_setacl_sz (compound_decode_hdr_maxsz + \ decode_sequence_maxsz + \ decode_putfh_maxsz + \ decode_setacl_maxsz) #define NFS4_enc_fs_locations_sz \ (compound_encode_hdr_maxsz + \ encode_sequence_maxsz + \ encode_putfh_maxsz + \ encode_lookup_maxsz + \ encode_fs_locations_maxsz) #define NFS4_dec_fs_locations_sz \ (compound_decode_hdr_maxsz + \ decode_sequence_maxsz + \ decode_putfh_maxsz + \ decode_lookup_maxsz + \ decode_fs_locations_maxsz) #if defined(CONFIG_NFS_V4_1) #define NFS4_enc_exchange_id_sz \ (compound_encode_hdr_maxsz + \ encode_exchange_id_maxsz) #define NFS4_dec_exchange_id_sz \ (compound_decode_hdr_maxsz + \ decode_exchange_id_maxsz) #define NFS4_enc_create_session_sz \ (compound_encode_hdr_maxsz + \ encode_create_session_maxsz) #define NFS4_dec_create_session_sz \ (compound_decode_hdr_maxsz + \ decode_create_session_maxsz) #define NFS4_enc_destroy_session_sz (compound_encode_hdr_maxsz + \ encode_destroy_session_maxsz) #define NFS4_dec_destroy_session_sz (compound_decode_hdr_maxsz + \ decode_destroy_session_maxsz) #define NFS4_enc_sequence_sz \ (compound_decode_hdr_maxsz + \ encode_sequence_maxsz) #define NFS4_dec_sequence_sz \ (compound_decode_hdr_maxsz + \ decode_sequence_maxsz) #define NFS4_enc_get_lease_time_sz (compound_encode_hdr_maxsz + \ encode_sequence_maxsz + \ encode_putrootfh_maxsz + \ encode_fsinfo_maxsz) #define NFS4_dec_get_lease_time_sz (compound_decode_hdr_maxsz + \ decode_sequence_maxsz + \ decode_putrootfh_maxsz + \ decode_fsinfo_maxsz) #endif /* CONFIG_NFS_V4_1 */ static const umode_t nfs_type2fmt[] = { [NF4BAD] = 0, [NF4REG] = S_IFREG, [NF4DIR] = S_IFDIR, [NF4BLK] = S_IFBLK, [NF4CHR] = S_IFCHR, [NF4LNK] = S_IFLNK, [NF4SOCK] = S_IFSOCK, [NF4FIFO] = S_IFIFO, [NF4ATTRDIR] = 0, [NF4NAMEDATTR] = 0, }; struct compound_hdr { int32_t status; uint32_t nops; __be32 * nops_p; uint32_t taglen; char * tag; uint32_t replen; /* expected reply words */ u32 minorversion; }; static __be32 *reserve_space(struct xdr_stream *xdr, size_t nbytes) { __be32 *p = xdr_reserve_space(xdr, nbytes); BUG_ON(!p); return p; } static void encode_string(struct xdr_stream *xdr, unsigned int len, const char *str) { __be32 *p; p = xdr_reserve_space(xdr, 4 + len); BUG_ON(p == NULL); xdr_encode_opaque(p, str, len); } static void encode_compound_hdr(struct xdr_stream *xdr, struct rpc_rqst *req, struct compound_hdr *hdr) { __be32 *p; struct rpc_auth *auth = req->rq_task->tk_msg.rpc_cred->cr_auth; /* initialize running count of expected bytes in reply. * NOTE: the replied tag SHOULD be the same is the one sent, * but this is not required as a MUST for the server to do so. */ hdr->replen = RPC_REPHDRSIZE + auth->au_rslack + 3 + hdr->taglen; dprintk("encode_compound: tag=%.*s\n", (int)hdr->taglen, hdr->tag); BUG_ON(hdr->taglen > NFS4_MAXTAGLEN); p = reserve_space(xdr, 4 + hdr->taglen + 8); p = xdr_encode_opaque(p, hdr->tag, hdr->taglen); *p++ = cpu_to_be32(hdr->minorversion); hdr->nops_p = p; *p = cpu_to_be32(hdr->nops); } static void encode_nops(struct compound_hdr *hdr) { BUG_ON(hdr->nops > NFS4_MAX_OPS); *hdr->nops_p = htonl(hdr->nops); } static void encode_nfs4_verifier(struct xdr_stream *xdr, const nfs4_verifier *verf) { __be32 *p; p = xdr_reserve_space(xdr, NFS4_VERIFIER_SIZE); BUG_ON(p == NULL); xdr_encode_opaque_fixed(p, verf->data, NFS4_VERIFIER_SIZE); } static void encode_attrs(struct xdr_stream *xdr, const struct iattr *iap, const struct nfs_server *server) { char owner_name[IDMAP_NAMESZ]; char owner_group[IDMAP_NAMESZ]; int owner_namelen = 0; int owner_grouplen = 0; __be32 *p; __be32 *q; int len; uint32_t bmval0 = 0; uint32_t bmval1 = 0; /* * We reserve enough space to write the entire attribute buffer at once. * In the worst-case, this would be * 12(bitmap) + 4(attrlen) + 8(size) + 4(mode) + 4(atime) + 4(mtime) * = 36 bytes, plus any contribution from variable-length fields * such as owner/group. */ len = 16; /* Sigh */ if (iap->ia_valid & ATTR_SIZE) len += 8; if (iap->ia_valid & ATTR_MODE) len += 4; if (iap->ia_valid & ATTR_UID) { owner_namelen = nfs_map_uid_to_name(server->nfs_client, iap->ia_uid, owner_name); if (owner_namelen < 0) { dprintk("nfs: couldn't resolve uid %d to string\n", iap->ia_uid); /* XXX */ strcpy(owner_name, "nobody"); owner_namelen = sizeof("nobody") - 1; /* goto out; */ } len += 4 + (XDR_QUADLEN(owner_namelen) << 2); } if (iap->ia_valid & ATTR_GID) { owner_grouplen = nfs_map_gid_to_group(server->nfs_client, iap->ia_gid, owner_group); if (owner_grouplen < 0) { dprintk("nfs: couldn't resolve gid %d to string\n", iap->ia_gid); strcpy(owner_group, "nobody"); owner_grouplen = sizeof("nobody") - 1; /* goto out; */ } len += 4 + (XDR_QUADLEN(owner_grouplen) << 2); } if (iap->ia_valid & ATTR_ATIME_SET) len += 16; else if (iap->ia_valid & ATTR_ATIME) len += 4; if (iap->ia_valid & ATTR_MTIME_SET) len += 16; else if (iap->ia_valid & ATTR_MTIME) len += 4; p = reserve_space(xdr, len); /* * We write the bitmap length now, but leave the bitmap and the attribute * buffer length to be backfilled at the end of this routine. */ *p++ = cpu_to_be32(2); q = p; p += 3; if (iap->ia_valid & ATTR_SIZE) { bmval0 |= FATTR4_WORD0_SIZE; p = xdr_encode_hyper(p, iap->ia_size); } if (iap->ia_valid & ATTR_MODE) { bmval1 |= FATTR4_WORD1_MODE; *p++ = cpu_to_be32(iap->ia_mode & S_IALLUGO); } if (iap->ia_valid & ATTR_UID) { bmval1 |= FATTR4_WORD1_OWNER; p = xdr_encode_opaque(p, owner_name, owner_namelen); } if (iap->ia_valid & ATTR_GID) { bmval1 |= FATTR4_WORD1_OWNER_GROUP; p = xdr_encode_opaque(p, owner_group, owner_grouplen); } if (iap->ia_valid & ATTR_ATIME_SET) { bmval1 |= FATTR4_WORD1_TIME_ACCESS_SET; *p++ = cpu_to_be32(NFS4_SET_TO_CLIENT_TIME); *p++ = cpu_to_be32(0); *p++ = cpu_to_be32(iap->ia_mtime.tv_sec); *p++ = cpu_to_be32(iap->ia_mtime.tv_nsec); } else if (iap->ia_valid & ATTR_ATIME) { bmval1 |= FATTR4_WORD1_TIME_ACCESS_SET; *p++ = cpu_to_be32(NFS4_SET_TO_SERVER_TIME); } if (iap->ia_valid & ATTR_MTIME_SET) { bmval1 |= FATTR4_WORD1_TIME_MODIFY_SET; *p++ = cpu_to_be32(NFS4_SET_TO_CLIENT_TIME); *p++ = cpu_to_be32(0); *p++ = cpu_to_be32(iap->ia_mtime.tv_sec); *p++ = cpu_to_be32(iap->ia_mtime.tv_nsec); } else if (iap->ia_valid & ATTR_MTIME) { bmval1 |= FATTR4_WORD1_TIME_MODIFY_SET; *p++ = cpu_to_be32(NFS4_SET_TO_SERVER_TIME); } /* * Now we backfill the bitmap and the attribute buffer length. */ if (len != ((char *)p - (char *)q) + 4) { printk(KERN_ERR "nfs: Attr length error, %u != %Zu\n", len, ((char *)p - (char *)q) + 4); BUG(); } len = (char *)p - (char *)q - 12; *q++ = htonl(bmval0); *q++ = htonl(bmval1); *q = htonl(len); /* out: */ } static void encode_access(struct xdr_stream *xdr, u32 access, struct compound_hdr *hdr) { __be32 *p; p = reserve_space(xdr, 8); *p++ = cpu_to_be32(OP_ACCESS); *p = cpu_to_be32(access); hdr->nops++; hdr->replen += decode_access_maxsz; } static void encode_close(struct xdr_stream *xdr, const struct nfs_closeargs *arg, struct compound_hdr *hdr) { __be32 *p; p = reserve_space(xdr, 8+NFS4_STATEID_SIZE); *p++ = cpu_to_be32(OP_CLOSE); *p++ = cpu_to_be32(arg->seqid->sequence->counter); xdr_encode_opaque_fixed(p, arg->stateid->data, NFS4_STATEID_SIZE); hdr->nops++; hdr->replen += decode_close_maxsz; } static void encode_commit(struct xdr_stream *xdr, const struct nfs_writeargs *args, struct compound_hdr *hdr) { __be32 *p; p = reserve_space(xdr, 16); *p++ = cpu_to_be32(OP_COMMIT); p = xdr_encode_hyper(p, args->offset); *p = cpu_to_be32(args->count); hdr->nops++; hdr->replen += decode_commit_maxsz; } static void encode_create(struct xdr_stream *xdr, const struct nfs4_create_arg *create, struct compound_hdr *hdr) { __be32 *p; p = reserve_space(xdr, 8); *p++ = cpu_to_be32(OP_CREATE); *p = cpu_to_be32(create->ftype); switch (create->ftype) { case NF4LNK: p = reserve_space(xdr, 4); *p = cpu_to_be32(create->u.symlink.len); xdr_write_pages(xdr, create->u.symlink.pages, 0, create->u.symlink.len); break; case NF4BLK: case NF4CHR: p = reserve_space(xdr, 8); *p++ = cpu_to_be32(create->u.device.specdata1); *p = cpu_to_be32(create->u.device.specdata2); break; default: break; } encode_string(xdr, create->name->len, create->name->name); hdr->nops++; hdr->replen += decode_create_maxsz; encode_attrs(xdr, create->attrs, create->server); } static void encode_getattr_one(struct xdr_stream *xdr, uint32_t bitmap, struct compound_hdr *hdr) { __be32 *p; p = reserve_space(xdr, 12); *p++ = cpu_to_be32(OP_GETATTR); *p++ = cpu_to_be32(1); *p = cpu_to_be32(bitmap); hdr->nops++; hdr->replen += decode_getattr_maxsz; } static void encode_getattr_two(struct xdr_stream *xdr, uint32_t bm0, uint32_t bm1, struct compound_hdr *hdr) { __be32 *p; p = reserve_space(xdr, 16); *p++ = cpu_to_be32(OP_GETATTR); *p++ = cpu_to_be32(2); *p++ = cpu_to_be32(bm0); *p = cpu_to_be32(bm1); hdr->nops++; hdr->replen += decode_getattr_maxsz; } static void encode_getfattr(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr) { encode_getattr_two(xdr, bitmask[0] & nfs4_fattr_bitmap[0], bitmask[1] & nfs4_fattr_bitmap[1], hdr); } static void encode_fsinfo(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr) { encode_getattr_two(xdr, bitmask[0] & nfs4_fsinfo_bitmap[0], bitmask[1] & nfs4_fsinfo_bitmap[1], hdr); } static void encode_fs_locations(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr) { encode_getattr_two(xdr, bitmask[0] & nfs4_fs_locations_bitmap[0], bitmask[1] & nfs4_fs_locations_bitmap[1], hdr); } static void encode_getfh(struct xdr_stream *xdr, struct compound_hdr *hdr) { __be32 *p; p = reserve_space(xdr, 4); *p = cpu_to_be32(OP_GETFH); hdr->nops++; hdr->replen += decode_getfh_maxsz; } static void encode_link(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr) { __be32 *p; p = reserve_space(xdr, 8 + name->len); *p++ = cpu_to_be32(OP_LINK); xdr_encode_opaque(p, name->name, name->len); hdr->nops++; hdr->replen += decode_link_maxsz; } static inline int nfs4_lock_type(struct file_lock *fl, int block) { if ((fl->fl_type & (F_RDLCK|F_WRLCK|F_UNLCK)) == F_RDLCK) return block ? NFS4_READW_LT : NFS4_READ_LT; return block ? NFS4_WRITEW_LT : NFS4_WRITE_LT; } static inline uint64_t nfs4_lock_length(struct file_lock *fl) { if (fl->fl_end == OFFSET_MAX) return ~(uint64_t)0; return fl->fl_end - fl->fl_start + 1; } /* * 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; p = reserve_space(xdr, 32); *p++ = cpu_to_be32(OP_LOCK); *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){ p = reserve_space(xdr, 4+NFS4_STATEID_SIZE+32); *p++ = cpu_to_be32(args->open_seqid->sequence->counter); p = xdr_encode_opaque_fixed(p, args->open_stateid->data, NFS4_STATEID_SIZE); *p++ = cpu_to_be32(args->lock_seqid->sequence->counter); p = xdr_encode_hyper(p, args->lock_owner.clientid); *p++ = cpu_to_be32(16); p = xdr_encode_opaque_fixed(p, "lock id:", 8); xdr_encode_hyper(p, args->lock_owner.id); } else { p = reserve_space(xdr, NFS4_STATEID_SIZE+4); p = xdr_encode_opaque_fixed(p, args->lock_stateid->data, NFS4_STATEID_SIZE); *p = cpu_to_be32(args->lock_seqid->sequence->counter); } hdr->nops++; hdr->replen += decode_lock_maxsz; } static void encode_lockt(struct xdr_stream *xdr, const struct nfs_lockt_args *args, struct compound_hdr *hdr) { __be32 *p; p = reserve_space(xdr, 52); *p++ = cpu_to_be32(OP_LOCKT); *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)); p = xdr_encode_hyper(p, args->lock_owner.clientid); *p++ = cpu_to_be32(16); p = xdr_encode_opaque_fixed(p, "lock id:", 8); xdr_encode_hyper(p, args->lock_owner.id); hdr->nops++; hdr->replen += decode_lockt_maxsz; } static void encode_locku(struct xdr_stream *xdr, const struct nfs_locku_args *args, struct compound_hdr *hdr) { __be32 *p; p = reserve_space(xdr, 12+NFS4_STATEID_SIZE+16); *p++ = cpu_to_be32(OP_LOCKU); *p++ = cpu_to_be32(nfs4_lock_type(args->fl, 0)); *p++ = cpu_to_be32(args->seqid->sequence->counter); p = xdr_encode_opaque_fixed(p, args->stateid->data, NFS4_STATEID_SIZE); p = xdr_encode_hyper(p, args->fl->fl_start); xdr_encode_hyper(p, nfs4_lock_length(args->fl)); hdr->nops++; hdr->replen += decode_locku_maxsz; } static void encode_lookup(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr) { int len = name->len; __be32 *p; p = reserve_space(xdr, 8 + len); *p++ = cpu_to_be32(OP_LOOKUP); xdr_encode_opaque(p, name->name, len); hdr->nops++; hdr->replen += decode_lookup_maxsz; } static void encode_share_access(struct xdr_stream *xdr, fmode_t fmode) { __be32 *p; p = reserve_space(xdr, 8); switch (fmode & (FMODE_READ|FMODE_WRITE)) { case FMODE_READ: *p++ = cpu_to_be32(NFS4_SHARE_ACCESS_READ); break; case FMODE_WRITE: *p++ = cpu_to_be32(NFS4_SHARE_ACCESS_WRITE); break; case FMODE_READ|FMODE_WRITE: *p++ = cpu_to_be32(NFS4_SHARE_ACCESS_BOTH); break; default: *p++ = cpu_to_be32(0); } *p = cpu_to_be32(0); /* for linux, share_deny = 0 always */ } static inline void encode_openhdr(struct xdr_stream *xdr, const struct nfs_openargs *arg) { __be32 *p; /* * opcode 4, seqid 4, share_access 4, share_deny 4, clientid 8, ownerlen 4, * owner 4 = 32 */ p = reserve_space(xdr, 8); *p++ = cpu_to_be32(OP_OPEN); *p = cpu_to_be32(arg->seqid->sequence->counter); encode_share_access(xdr, arg->fmode); p = reserve_space(xdr, 28); p = xdr_encode_hyper(p, arg->clientid); *p++ = cpu_to_be32(16); p = xdr_encode_opaque_fixed(p, "open id:", 8); xdr_encode_hyper(p, arg->id); } static inline void encode_createmode(struct xdr_stream *xdr, const struct nfs_openargs *arg) { __be32 *p; p = reserve_space(xdr, 4); switch(arg->open_flags & O_EXCL) { case 0: *p = cpu_to_be32(NFS4_CREATE_UNCHECKED); encode_attrs(xdr, arg->u.attrs, arg->server); break; default: *p = cpu_to_be32(NFS4_CREATE_EXCLUSIVE); encode_nfs4_verifier(xdr, &arg->u.verifier); } } static void encode_opentype(struct xdr_stream *xdr, const struct nfs_openargs *arg) { __be32 *p; p = reserve_space(xdr, 4); switch (arg->open_flags & O_CREAT) { case 0: *p = cpu_to_be32(NFS4_OPEN_NOCREATE); break; default: BUG_ON(arg->claim != NFS4_OPEN_CLAIM_NULL); *p = cpu_to_be32(NFS4_OPEN_CREATE); encode_createmode(xdr, arg); } } static inline void encode_delegation_type(struct xdr_stream *xdr, fmode_t delegation_type) { __be32 *p; p = reserve_space(xdr, 4); switch (delegation_type) { case 0: *p = cpu_to_be32(NFS4_OPEN_DELEGATE_NONE); break; case FMODE_READ: *p = cpu_to_be32(NFS4_OPEN_DELEGATE_READ); break; case FMODE_WRITE|FMODE_READ: *p = cpu_to_be32(NFS4_OPEN_DELEGATE_WRITE); break; default: BUG(); } } static inline void encode_claim_null(struct xdr_stream *xdr, const struct qstr *name) { __be32 *p; p = reserve_space(xdr, 4); *p = cpu_to_be32(NFS4_OPEN_CLAIM_NULL); encode_string(xdr, name->len, name->name); } static inline void encode_claim_previous(struct xdr_stream *xdr, fmode_t type) { __be32 *p; p = reserve_space(xdr, 4); *p = cpu_to_be32(NFS4_OPEN_CLAIM_PREVIOUS); encode_delegation_type(xdr, type); } static inline void encode_claim_delegate_cur(struct xdr_stream *xdr, const struct qstr *name, const nfs4_stateid *stateid) { __be32 *p; p = reserve_space(xdr, 4+NFS4_STATEID_SIZE); *p++ = cpu_to_be32(NFS4_OPEN_CLAIM_DELEGATE_CUR); xdr_encode_opaque_fixed(p, stateid->data, NFS4_STATEID_SIZE); encode_string(xdr, name->len, name->name); } static void encode_open(struct xdr_stream *xdr, const struct nfs_openargs *arg, struct compound_hdr *hdr) { encode_openhdr(xdr, arg); encode_opentype(xdr, arg); switch (arg->claim) { case NFS4_OPEN_CLAIM_NULL: encode_claim_null(xdr, arg->name); break; case NFS4_OPEN_CLAIM_PREVIOUS: encode_claim_previous(xdr, arg->u.delegation_type); break; case NFS4_OPEN_CLAIM_DELEGATE_CUR: encode_claim_delegate_cur(xdr, arg->name, &arg->u.delegation); break; default: BUG(); } hdr->nops++; hdr->replen += decode_open_maxsz; } static void encode_open_confirm(struct xdr_stream *xdr, const struct nfs_open_confirmargs *arg, struct compound_hdr *hdr) { __be32 *p; p = reserve_space(xdr, 4+NFS4_STATEID_SIZE+4); *p++ = cpu_to_be32(OP_OPEN_CONFIRM); p = xdr_encode_opaque_fixed(p, arg->stateid->data, NFS4_STATEID_SIZE); *p = cpu_to_be32(arg->seqid->sequence->counter); hdr->nops++; hdr->replen += decode_open_confirm_maxsz; } static void encode_open_downgrade(struct xdr_stream *xdr, const struct nfs_closeargs *arg, struct compound_hdr *hdr) { __be32 *p; p = reserve_space(xdr, 4+NFS4_STATEID_SIZE+4); *p++ = cpu_to_be32(OP_OPEN_DOWNGRADE); p = xdr_encode_opaque_fixed(p, arg->stateid->data, NFS4_STATEID_SIZE); *p = cpu_to_be32(arg->seqid->sequence->counter); encode_share_access(xdr, arg->fmode); hdr->nops++; hdr->replen += decode_open_downgrade_maxsz; } static void encode_putfh(struct xdr_stream *xdr, const struct nfs_fh *fh, struct compound_hdr *hdr) { int len = fh->size; __be32 *p; p = reserve_space(xdr, 8 + len); *p++ = cpu_to_be32(OP_PUTFH); xdr_encode_opaque(p, fh->data, len); hdr->nops++; hdr->replen += decode_putfh_maxsz; } static void encode_putrootfh(struct xdr_stream *xdr, struct compound_hdr *hdr) { __be32 *p; p = reserve_space(xdr, 4); *p = cpu_to_be32(OP_PUTROOTFH); hdr->nops++; hdr->replen += decode_putrootfh_maxsz; } static void encode_stateid(struct xdr_stream *xdr, const struct nfs_open_context *ctx) { nfs4_stateid stateid; __be32 *p; p = reserve_space(xdr, NFS4_STATEID_SIZE); if (ctx->state != NULL) { nfs4_copy_stateid(&stateid, ctx->state, ctx->lockowner); xdr_encode_opaque_fixed(p, stateid.data, NFS4_STATEID_SIZE); } else xdr_encode_opaque_fixed(p, zero_stateid.data, NFS4_STATEID_SIZE); } static void encode_read(struct xdr_stream *xdr, const struct nfs_readargs *args, struct compound_hdr *hdr) { __be32 *p; p = reserve_space(xdr, 4); *p = cpu_to_be32(OP_READ); encode_stateid(xdr, args->context); p = reserve_space(xdr, 12); p = xdr_encode_hyper(p, args->offset); *p = cpu_to_be32(args->count); hdr->nops++; hdr->replen += decode_read_maxsz; } static void encode_readdir(struct xdr_stream *xdr, const struct nfs4_readdir_arg *readdir, struct rpc_rqst *req, struct compound_hdr *hdr) { uint32_t attrs[2] = { FATTR4_WORD0_RDATTR_ERROR|FATTR4_WORD0_FILEID, FATTR4_WORD1_MOUNTED_ON_FILEID, }; __be32 *p; p = reserve_space(xdr, 12+NFS4_VERIFIER_SIZE+20); *p++ = cpu_to_be32(OP_READDIR); p = xdr_encode_hyper(p, readdir->cookie); p = xdr_encode_opaque_fixed(p, readdir->verifier.data, NFS4_VERIFIER_SIZE); *p++ = cpu_to_be32(readdir->count >> 1); /* We're not doing readdirplus */ *p++ = cpu_to_be32(readdir->count); *p++ = cpu_to_be32(2); /* Switch to mounted_on_fileid if the server supports it */ if (readdir->bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID) attrs[0] &= ~FATTR4_WORD0_FILEID; else attrs[1] &= ~FATTR4_WORD1_MOUNTED_ON_FILEID; *p++ = cpu_to_be32(attrs[0] & readdir->bitmask[0]); *p = cpu_to_be32(attrs[1] & readdir->bitmask[1]); hdr->nops++; hdr->replen += decode_readdir_maxsz; dprintk("%s: cookie = %Lu, verifier = %08x:%08x, bitmap = %08x:%08x\n", __func__, (unsigned long long)readdir->cookie, ((u32 *)readdir->verifier.data)[0], ((u32 *)readdir->verifier.data)[1], attrs[0] & readdir->bitmask[0], attrs[1] & readdir->bitmask[1]); } static void encode_readlink(struct xdr_stream *xdr, const struct nfs4_readlink *readlink, struct rpc_rqst *req, struct compound_hdr *hdr) { __be32 *p; p = reserve_space(xdr, 4); *p = cpu_to_be32(OP_READLINK); hdr->nops++; hdr->replen += decode_readlink_maxsz; } static void encode_remove(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr) { __be32 *p; p = reserve_space(xdr, 8 + name->len); *p++ = cpu_to_be32(OP_REMOVE); xdr_encode_opaque(p, name->name, name->len); hdr->nops++; hdr->replen += decode_remove_maxsz; } static void encode_rename(struct xdr_stream *xdr, const struct qstr *oldname, const struct qstr *newname, struct compound_hdr *hdr) { __be32 *p; p = reserve_space(xdr, 4); *p = cpu_to_be32(OP_RENAME); encode_string(xdr, oldname->len, oldname->name); encode_string(xdr, newname->len, newname->name); hdr->nops++; hdr->replen += decode_rename_maxsz; } static void encode_renew(struct xdr_stream *xdr, const struct nfs_client *client_stateid, struct compound_hdr *hdr) { __be32 *p; p = reserve_space(xdr, 12); *p++ = cpu_to_be32(OP_RENEW); xdr_encode_hyper(p, client_stateid->cl_clientid); hdr->nops++; hdr->replen += decode_renew_maxsz; } static void encode_restorefh(struct xdr_stream *xdr, struct compound_hdr *hdr) { __be32 *p; p = reserve_space(xdr, 4); *p = cpu_to_be32(OP_RESTOREFH); hdr->nops++; hdr->replen += decode_restorefh_maxsz; } static int encode_setacl(struct xdr_stream *xdr, struct nfs_setaclargs *arg, struct compound_hdr *hdr) { __be32 *p; p = reserve_space(xdr, 4+NFS4_STATEID_SIZE); *p++ = cpu_to_be32(OP_SETATTR); xdr_encode_opaque_fixed(p, zero_stateid.data, NFS4_STATEID_SIZE); p = reserve_space(xdr, 2*4); *p++ = cpu_to_be32(1); *p = cpu_to_be32(FATTR4_WORD0_ACL); if (arg->acl_len % 4) return -EINVAL; p = reserve_space(xdr, 4); *p = cpu_to_be32(arg->acl_len); xdr_write_pages(xdr, arg->acl_pages, arg->acl_pgbase, arg->acl_len); hdr->nops++; hdr->replen += decode_setacl_maxsz; return 0; } static void encode_savefh(struct xdr_stream *xdr, struct compound_hdr *hdr) { __be32 *p; p = reserve_space(xdr, 4); *p = cpu_to_be32(OP_SAVEFH); hdr->nops++; hdr->replen += decode_savefh_maxsz; } static void encode_setattr(struct xdr_stream *xdr, const struct nfs_setattrargs *arg, const struct nfs_server *server, struct compound_hdr *hdr) { __be32 *p; p = reserve_space(xdr, 4+NFS4_STATEID_SIZE); *p++ = cpu_to_be32(OP_SETATTR); xdr_encode_opaque_fixed(p, arg->stateid.data, NFS4_STATEID_SIZE); hdr->nops++; hdr->replen += decode_setattr_maxsz; encode_attrs(xdr, arg->iap, server); } static void encode_setclientid(struct xdr_stream *xdr, const struct nfs4_setclientid *setclientid, struct compound_hdr *hdr) { __be32 *p; p = reserve_space(xdr, 4 + NFS4_VERIFIER_SIZE); *p++ = cpu_to_be32(OP_SETCLIENTID); xdr_encode_opaque_fixed(p, setclientid->sc_verifier->data, NFS4_VERIFIER_SIZE); encode_string(xdr, setclientid->sc_name_len, setclientid->sc_name); p = reserve_space(xdr, 4); *p = cpu_to_be32(setclientid->sc_prog); encode_string(xdr, setclientid->sc_netid_len, setclientid->sc_netid); encode_string(xdr, setclientid->sc_uaddr_len, setclientid->sc_uaddr); p = reserve_space(xdr, 4); *p = cpu_to_be32(setclientid->sc_cb_ident); hdr->nops++; hdr->replen += decode_setclientid_maxsz; } static void encode_setclientid_confirm(struct xdr_stream *xdr, const struct nfs_client *client_state, struct compound_hdr *hdr) { __be32 *p; p = reserve_space(xdr, 12 + NFS4_VERIFIER_SIZE); *p++ = cpu_to_be32(OP_SETCLIENTID_CONFIRM); p = xdr_encode_hyper(p, client_state->cl_clientid); xdr_encode_opaque_fixed(p, client_state->cl_confirm.data, NFS4_VERIFIER_SIZE); hdr->nops++; hdr->replen += decode_setclientid_confirm_maxsz; } static void encode_write(struct xdr_stream *xdr, const struct nfs_writeargs *args, struct compound_hdr *hdr) { __be32 *p; p = reserve_space(xdr, 4); *p = cpu_to_be32(OP_WRITE); encode_stateid(xdr, args->context); 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); hdr->nops++; hdr->replen += decode_write_maxsz; } static void encode_delegreturn(struct xdr_stream *xdr, const nfs4_stateid *stateid, struct compound_hdr *hdr) { __be32 *p; p = reserve_space(xdr, 4+NFS4_STATEID_SIZE); *p++ = cpu_to_be32(OP_DELEGRETURN); xdr_encode_opaque_fixed(p, stateid->data, NFS4_STATEID_SIZE); hdr->nops++; hdr->replen += decode_delegreturn_maxsz; } #if defined(CONFIG_NFS_V4_1) /* NFSv4.1 operations */ static void encode_exchange_id(struct xdr_stream *xdr, struct nfs41_exchange_id_args *args, struct compound_hdr *hdr) { __be32 *p; p = reserve_space(xdr, 4 + sizeof(args->verifier->data)); *p++ = cpu_to_be32(OP_EXCHANGE_ID); xdr_encode_opaque_fixed(p, args->verifier->data, sizeof(args->verifier->data)); encode_string(xdr, args->id_len, args->id); p = reserve_space(xdr, 12); *p++ = cpu_to_be32(args->flags); *p++ = cpu_to_be32(0); /* zero length state_protect4_a */ *p = cpu_to_be32(0); /* zero length implementation id array */ hdr->nops++; hdr->replen += decode_exchange_id_maxsz; } static void encode_create_session(struct xdr_stream *xdr, struct nfs41_create_session_args *args, struct compound_hdr *hdr) { __be32 *p; char machine_name[NFS4_MAX_MACHINE_NAME_LEN]; uint32_t len; struct nfs_client *clp = args->client; len = scnprintf(machine_name, sizeof(machine_name), "%s", clp->cl_ipaddr); p = reserve_space(xdr, 20 + 2*28 + 20 + len + 12); *p++ = cpu_to_be32(OP_CREATE_SESSION); p = xdr_encode_hyper(p, clp->cl_ex_clid); *p++ = cpu_to_be32(clp->cl_seqid); /*Sequence id */ *p++ = cpu_to_be32(args->flags); /*flags */ /* Fore Channel */ *p++ = cpu_to_be32(args->fc_attrs.headerpadsz); /* header padding size */ *p++ = cpu_to_be32(args->fc_attrs.max_rqst_sz); /* max req size */ *p++ = cpu_to_be32(args->fc_attrs.max_resp_sz); /* max resp size */ *p++ = cpu_to_be32(args->fc_attrs.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(args->fc_attrs.headerpadsz); /* header padding size */ *p++ = cpu_to_be32(args->bc_attrs.max_rqst_sz); /* max req size */ *p++ = cpu_to_be32(args->bc_attrs.max_resp_sz); /* max resp size */ *p++ = cpu_to_be32(args->bc_attrs.max_resp_sz_cached); /* Max resp sz cached */ *p++ = cpu_to_be32(args->bc_attrs.max_ops); /* max operations */ *p++ = cpu_to_be32(args->bc_attrs.max_reqs); /* max requests */ *p++ = cpu_to_be32(0); /* rdmachannel_attrs */ *p++ = cpu_to_be32(args->cb_program); /* cb_program */ *p++ = cpu_to_be32(1); *p++ = cpu_to_be32(RPC_AUTH_UNIX); /* auth_sys */ /* authsys_parms rfc1831 */ *p++ = cpu_to_be32((u32)clp->cl_boot_time.tv_nsec); /* stamp */ p = xdr_encode_opaque(p, machine_name, len); *p++ = cpu_to_be32(0); /* UID */ *p++ = cpu_to_be32(0); /* GID */ *p = cpu_to_be32(0); /* No more gids */ hdr->nops++; hdr->replen += decode_create_session_maxsz; } static void encode_destroy_session(struct xdr_stream *xdr, struct nfs4_session *session, struct compound_hdr *hdr) { __be32 *p; p = reserve_space(xdr, 4 + NFS4_MAX_SESSIONID_LEN); *p++ = cpu_to_be32(OP_DESTROY_SESSION); xdr_encode_opaque_fixed(p, session->sess_id.data, NFS4_MAX_SESSIONID_LEN); hdr->nops++; hdr->replen += decode_destroy_session_maxsz; } #endif /* CONFIG_NFS_V4_1 */ static void encode_sequence(struct xdr_stream *xdr, const struct nfs4_sequence_args *args, struct compound_hdr *hdr) { #if defined(CONFIG_NFS_V4_1) struct nfs4_session *session = args->sa_session; struct nfs4_slot_table *tp; struct nfs4_slot *slot; __be32 *p; if (!session) return; tp = &session->fc_slot_table; WARN_ON(args->sa_slotid == NFS4_MAX_SLOT_TABLE); slot = tp->slots + args->sa_slotid; p = reserve_space(xdr, 4 + NFS4_MAX_SESSIONID_LEN + 16); *p++ = cpu_to_be32(OP_SEQUENCE); /* * Sessionid + seqid + slotid + max slotid + cache_this */ dprintk("%s: sessionid=%u:%u:%u:%u seqid=%d slotid=%d " "max_slotid=%d cache_this=%d\n", __func__, ((u32 *)session->sess_id.data)[0], ((u32 *)session->sess_id.data)[1], ((u32 *)session->sess_id.data)[2], ((u32 *)session->sess_id.data)[3], slot->seq_nr, args->sa_slotid, tp->highest_used_slotid, args->sa_cache_this); p = xdr_encode_opaque_fixed(p, session->sess_id.data, NFS4_MAX_SESSIONID_LEN); *p++ = cpu_to_be32(slot->seq_nr); *p++ = cpu_to_be32(args->sa_slotid); *p++ = cpu_to_be32(tp->highest_used_slotid); *p = cpu_to_be32(args->sa_cache_this); hdr->nops++; hdr->replen += decode_sequence_maxsz; #endif /* CONFIG_NFS_V4_1 */ } /* * END OF "GENERIC" ENCODE ROUTINES. */ static u32 nfs4_xdr_minorversion(const struct nfs4_sequence_args *args) { #if defined(CONFIG_NFS_V4_1) if (args->sa_session) return args->sa_session->clp->cl_minorversion; #endif /* CONFIG_NFS_V4_1 */ return 0; } /* * Encode an ACCESS request */ static int nfs4_xdr_enc_access(struct rpc_rqst *req, __be32 *p, const struct nfs4_accessargs *args) { struct xdr_stream xdr; struct compound_hdr hdr = { .minorversion = nfs4_xdr_minorversion(&args->seq_args), }; xdr_init_encode(&xdr, &req->rq_snd_buf, p); encode_compound_hdr(&xdr, req, &hdr); encode_sequence(&xdr, &args->seq_args, &hdr); encode_putfh(&xdr, args->fh, &hdr); encode_access(&xdr, args->access, &hdr); encode_getfattr(&xdr, args->bitmask, &hdr); encode_nops(&hdr); return 0; } /* * Encode LOOKUP request */ static int nfs4_xdr_enc_lookup(struct rpc_rqst *req, __be32 *p, const struct nfs4_lookup_arg *args) { struct xdr_stream xdr; struct compound_hdr hdr = { .minorversion = nfs4_xdr_minorversion(&args->seq_args), }; xdr_init_encode(&xdr, &req->rq_snd_buf, p); encode_compound_hdr(&xdr, req, &hdr); encode_sequence(&xdr, &args->seq_args, &hdr); encode_putfh(&xdr, args->dir_fh, &hdr); encode_lookup(&xdr, args->name, &hdr); encode_getfh(&xdr, &hdr); encode_getfattr(&xdr, args->bitmask, &hdr); encode_nops(&hdr); return 0; } /* * Encode LOOKUP_ROOT request */ static int nfs4_xdr_enc_lookup_root(struct rpc_rqst *req, __be32 *p, const struct nfs4_lookup_root_arg *args) { struct xdr_stream xdr; struct compound_hdr hdr = { .minorversion = nfs4_xdr_minorversion(&args->seq_args), }; xdr_init_encode(&xdr, &req->rq_snd_buf, p); encode_compound_hdr(&xdr, req, &hdr); encode_sequence(&xdr, &args->seq_args, &hdr); encode_putrootfh(&xdr, &hdr); encode_getfh(&xdr, &hdr); encode_getfattr(&xdr, args->bitmask, &hdr); encode_nops(&hdr); return 0; } /* * Encode REMOVE request */ static int nfs4_xdr_enc_remove(struct rpc_rqst *req, __be32 *p, const struct nfs_removeargs *args) { struct xdr_stream xdr; struct compound_hdr hdr = { .minorversion = nfs4_xdr_minorversion(&args->seq_args), }; xdr_init_encode(&xdr, &req->rq_snd_buf, p); encode_compound_hdr(&xdr, req, &hdr); encode_sequence(&xdr, &args->seq_args, &hdr); encode_putfh(&xdr, args->fh, &hdr); encode_remove(&xdr, &args->name, &hdr); encode_getfattr(&xdr, args->bitmask, &hdr); encode_nops(&hdr); return 0; } /* * Encode RENAME request */ static int nfs4_xdr_enc_rename(struct rpc_rqst *req, __be32 *p, const struct nfs4_rename_arg *args) { struct xdr_stream xdr; struct compound_hdr hdr = { .minorversion = nfs4_xdr_minorversion(&args->seq_args), }; xdr_init_encode(&xdr, &req->rq_snd_buf, p); encode_compound_hdr(&xdr, req, &hdr); encode_sequence(&xdr, &args->seq_args, &hdr); encode_putfh(&xdr, args->old_dir, &hdr); encode_savefh(&xdr, &hdr); encode_putfh(&xdr, args->new_dir, &hdr); encode_rename(&xdr, args->old_name, args->new_name, &hdr); encode_getfattr(&xdr, args->bitmask, &hdr); encode_restorefh(&xdr, &hdr); encode_getfattr(&xdr, args->bitmask, &hdr); encode_nops(&hdr); return 0; } /* * Encode LINK request */ static int nfs4_xdr_enc_link(struct rpc_rqst *req, __be32 *p, const struct nfs4_link_arg *args) { struct xdr_stream xdr; struct compound_hdr hdr = { .minorversion = nfs4_xdr_minorversion(&args->seq_args), }; xdr_init_encode(&xdr, &req->rq_snd_buf, p); encode_compound_hdr(&xdr, req, &hdr); encode_sequence(&xdr, &args->seq_args, &hdr); encode_putfh(&xdr, args->fh, &hdr); encode_savefh(&xdr, &hdr); encode_putfh(&xdr, args->dir_fh, &hdr); encode_link(&xdr, args->name, &hdr); encode_getfattr(&xdr, args->bitmask, &hdr); encode_restorefh(&xdr, &hdr); encode_getfattr(&xdr, args->bitmask, &hdr); encode_nops(&hdr); return 0; } /* * Encode CREATE request */ static int nfs4_xdr_enc_create(struct rpc_rqst *req, __be32 *p, const struct nfs4_create_arg *args) { struct xdr_stream xdr; struct compound_hdr hdr = { .minorversion = nfs4_xdr_minorversion(&args->seq_args), }; xdr_init_encode(&xdr, &req->rq_snd_buf, p); encode_compound_hdr(&xdr, req, &hdr); encode_sequence(&xdr, &args->seq_args, &hdr); encode_putfh(&xdr, args->dir_fh, &hdr); encode_savefh(&xdr, &hdr); encode_create(&xdr, args, &hdr); encode_getfh(&xdr, &hdr); encode_getfattr(&xdr, args->bitmask, &hdr); encode_restorefh(&xdr, &hdr); encode_getfattr(&xdr, args->bitmask, &hdr); encode_nops(&hdr); return 0; } /* * Encode SYMLINK request */ static int nfs4_xdr_enc_symlink(struct rpc_rqst *req, __be32 *p, const struct nfs4_create_arg *args) { return nfs4_xdr_enc_create(req, p, args); } /* * Encode GETATTR request */ static int nfs4_xdr_enc_getattr(struct rpc_rqst *req, __be32 *p, const struct nfs4_getattr_arg *args) { struct xdr_stream xdr; struct compound_hdr hdr = { .minorversion = nfs4_xdr_minorversion(&args->seq_args), }; xdr_init_encode(&xdr, &req->rq_snd_buf, p); encode_compound_hdr(&xdr, req, &hdr); encode_sequence(&xdr, &args->seq_args, &hdr); encode_putfh(&xdr, args->fh, &hdr); encode_getfattr(&xdr, args->bitmask, &hdr); encode_nops(&hdr); return 0; } /* * Encode a CLOSE request */ static int nfs4_xdr_enc_close(struct rpc_rqst *req, __be32 *p, struct nfs_closeargs *args) { struct xdr_stream xdr; struct compound_hdr hdr = { .minorversion = nfs4_xdr_minorversion(&args->seq_args), }; xdr_init_encode(&xdr, &req->rq_snd_buf, p); encode_compound_hdr(&xdr, req, &hdr); encode_sequence(&xdr, &args->seq_args, &hdr); encode_putfh(&xdr, args->fh, &hdr); encode_close(&xdr, args, &hdr); encode_getfattr(&xdr, args->bitmask, &hdr); encode_nops(&hdr); return 0; } /* * Encode an OPEN request */ static int nfs4_xdr_enc_open(struct rpc_rqst *req, __be32 *p, struct nfs_openargs *args) { struct xdr_stream xdr; struct compound_hdr hdr = { .minorversion = nfs4_xdr_minorversion(&args->seq_args), }; xdr_init_encode(&xdr, &req->rq_snd_buf, p); encode_compound_hdr(&xdr, req, &hdr); encode_sequence(&xdr, &args->seq_args, &hdr); encode_putfh(&xdr, args->fh, &hdr); encode_savefh(&xdr, &hdr); encode_open(&xdr, args, &hdr); encode_getfh(&xdr, &hdr); encode_getfattr(&xdr, args->bitmask, &hdr); encode_restorefh(&xdr, &hdr); encode_getfattr(&xdr, args->bitmask, &hdr); encode_nops(&hdr); return 0; } /* * Encode an OPEN_CONFIRM request */ static int nfs4_xdr_enc_open_confirm(struct rpc_rqst *req, __be32 *p, struct nfs_open_confirmargs *args) { struct xdr_stream xdr; struct compound_hdr hdr = { .nops = 0, }; xdr_init_encode(&xdr, &req->rq_snd_buf, p); encode_compound_hdr(&xdr, req, &hdr); encode_putfh(&xdr, args->fh, &hdr); encode_open_confirm(&xdr, args, &hdr); encode_nops(&hdr); return 0; } /* * Encode an OPEN request with no attributes. */ static int nfs4_xdr_enc_open_noattr(struct rpc_rqst *req, __be32 *p, struct nfs_openargs *args) { struct xdr_stream xdr; struct compound_hdr hdr = { .minorversion = nfs4_xdr_minorversion(&args->seq_args), }; xdr_init_encode(&xdr, &req->rq_snd_buf, p); encode_compound_hdr(&xdr, req, &hdr); encode_sequence(&xdr, &args->seq_args, &hdr); encode_putfh(&xdr, args->fh, &hdr); encode_open(&xdr, args, &hdr); encode_getfattr(&xdr, args->bitmask, &hdr); encode_nops(&hdr); return 0; } /* * Encode an OPEN_DOWNGRADE request */ static int nfs4_xdr_enc_open_downgrade(struct rpc_rqst *req, __be32 *p, struct nfs_closeargs *args) { struct xdr_stream xdr; struct compound_hdr hdr = { .minorversion = nfs4_xdr_minorversion(&args->seq_args), }; xdr_init_encode(&xdr, &req->rq_snd_buf, p); encode_compound_hdr(&xdr, req, &hdr); encode_sequence(&xdr, &args->seq_args, &hdr); encode_putfh(&xdr, args->fh, &hdr); encode_open_downgrade(&xdr, args, &hdr); encode_getfattr(&xdr, args->bitmask, &hdr); encode_nops(&hdr); return 0; } /* * Encode a LOCK request */ static int nfs4_xdr_enc_lock(struct rpc_rqst *req, __be32 *p, struct nfs_lock_args *args) { struct xdr_stream xdr; struct compound_hdr hdr = { .minorversion = nfs4_xdr_minorversion(&args->seq_args), }; xdr_init_encode(&xdr, &req->rq_snd_buf, p); encode_compound_hdr(&xdr, req, &hdr); encode_sequence(&xdr, &args->seq_args, &hdr); encode_putfh(&xdr, args->fh, &hdr); encode_lock(&xdr, args, &hdr); encode_nops(&hdr); return 0; } /* * Encode a LOCKT request */ static int nfs4_xdr_enc_lockt(struct rpc_rqst *req, __be32 *p, struct nfs_lockt_args *args) { struct xdr_stream xdr; struct compound_hdr hdr = { .minorversion = nfs4_xdr_minorversion(&args->seq_args), }; xdr_init_encode(&xdr, &req->rq_snd_buf, p); encode_compound_hdr(&xdr, req, &hdr); encode_sequence(&xdr, &args->seq_args, &hdr); encode_putfh(&xdr, args->fh, &hdr); encode_lockt(&xdr, args, &hdr); encode_nops(&hdr); return 0; } /* * Encode a LOCKU request */ static int nfs4_xdr_enc_locku(struct rpc_rqst *req, __be32 *p, struct nfs_locku_args *args) { struct xdr_stream xdr; struct compound_hdr hdr = { .minorversion = nfs4_xdr_minorversion(&args->seq_args), }; xdr_init_encode(&xdr, &req->rq_snd_buf, p); encode_compound_hdr(&xdr, req, &hdr); encode_sequence(&xdr, &args->seq_args, &hdr); encode_putfh(&xdr, args->fh, &hdr); encode_locku(&xdr, args, &hdr); encode_nops(&hdr); return 0; } /* * Encode a READLINK request */ static int nfs4_xdr_enc_readlink(struct rpc_rqst *req, __be32 *p, const struct nfs4_readlink *args) { struct xdr_stream xdr; struct compound_hdr hdr = { .minorversion = nfs4_xdr_minorversion(&args->seq_args), }; xdr_init_encode(&xdr, &req->rq_snd_buf, p); encode_compound_hdr(&xdr, req, &hdr); encode_sequence(&xdr, &args->seq_args, &hdr); encode_putfh(&xdr, args->fh, &hdr); encode_readlink(&xdr, args, req, &hdr); xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2, args->pages, args->pgbase, args->pglen); encode_nops(&hdr); return 0; } /* * Encode a READDIR request */ static int nfs4_xdr_enc_readdir(struct rpc_rqst *req, __be32 *p, const struct nfs4_readdir_arg *args) { struct xdr_stream xdr; struct compound_hdr hdr = { .minorversion = nfs4_xdr_minorversion(&args->seq_args), }; xdr_init_encode(&xdr, &req->rq_snd_buf, p); encode_compound_hdr(&xdr, req, &hdr); encode_sequence(&xdr, &args->seq_args, &hdr); encode_putfh(&xdr, args->fh, &hdr); encode_readdir(&xdr, args, req, &hdr); xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2, args->pages, args->pgbase, args->count); dprintk("%s: inlined page args = (%u, %p, %u, %u)\n", __func__, hdr.replen << 2, args->pages, args->pgbase, args->count); encode_nops(&hdr); return 0; } /* * Encode a READ request */ static int nfs4_xdr_enc_read(struct rpc_rqst *req, __be32 *p, struct nfs_readargs *args) { struct xdr_stream xdr; struct compound_hdr hdr = { .minorversion = nfs4_xdr_minorversion(&args->seq_args), }; xdr_init_encode(&xdr, &req->rq_snd_buf, p); encode_compound_hdr(&xdr, req, &hdr); encode_sequence(&xdr, &args->seq_args, &hdr); encode_putfh(&xdr, args->fh, &hdr); encode_read(&xdr, args, &hdr); xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2, args->pages, args->pgbase, args->count); req->rq_rcv_buf.flags |= XDRBUF_READ; encode_nops(&hdr); return 0; } /* * Encode an SETATTR request */ static int nfs4_xdr_enc_setattr(struct rpc_rqst *req, __be32 *p, struct nfs_setattrargs *args) { struct xdr_stream xdr; struct compound_hdr hdr = { .minorversion = nfs4_xdr_minorversion(&args->seq_args), }; xdr_init_encode(&xdr, &req->rq_snd_buf, p); encode_compound_hdr(&xdr, req, &hdr); encode_sequence(&xdr, &args->seq_args, &hdr); encode_putfh(&xdr, args->fh, &hdr); encode_setattr(&xdr, args, args->server, &hdr); encode_getfattr(&xdr, args->bitmask, &hdr); encode_nops(&hdr); return 0; } /* * Encode a GETACL request */ static int nfs4_xdr_enc_getacl(struct rpc_rqst *req, __be32 *p, struct nfs_getaclargs *args) { struct xdr_stream xdr; struct compound_hdr hdr = { .minorversion = nfs4_xdr_minorversion(&args->seq_args), }; uint32_t replen; xdr_init_encode(&xdr, &req->rq_snd_buf, p); encode_compound_hdr(&xdr, req, &hdr); encode_sequence(&xdr, &args->seq_args, &hdr); encode_putfh(&xdr, args->fh, &hdr); replen = hdr.replen + nfs4_fattr_bitmap_maxsz + 1; encode_getattr_two(&xdr, FATTR4_WORD0_ACL, 0, &hdr); xdr_inline_pages(&req->rq_rcv_buf, replen << 2, args->acl_pages, args->acl_pgbase, args->acl_len); encode_nops(&hdr); return 0; } /* * Encode a WRITE request */ static int nfs4_xdr_enc_write(struct rpc_rqst *req, __be32 *p, struct nfs_writeargs *args) { struct xdr_stream xdr; struct compound_hdr hdr = { .minorversion = nfs4_xdr_minorversion(&args->seq_args), }; xdr_init_encode(&xdr, &req->rq_snd_buf, p); encode_compound_hdr(&xdr, req, &hdr); encode_sequence(&xdr, &args->seq_args, &hdr); encode_putfh(&xdr, args->fh, &hdr); encode_write(&xdr, args, &hdr); req->rq_snd_buf.flags |= XDRBUF_WRITE; encode_getfattr(&xdr, args->bitmask, &hdr); encode_nops(&hdr); return 0; } /* * a COMMIT request */ static int nfs4_xdr_enc_commit(struct rpc_rqst *req, __be32 *p, struct nfs_writeargs *args) { struct xdr_stream xdr; struct compound_hdr hdr = { .minorversion = nfs4_xdr_minorversion(&args->seq_args), }; xdr_init_encode(&xdr, &req->rq_snd_buf, p); encode_compound_hdr(&xdr, req, &hdr); encode_sequence(&xdr, &args->seq_args, &hdr); encode_putfh(&xdr, args->fh, &hdr); encode_commit(&xdr, args, &hdr); encode_getfattr(&xdr, args->bitmask, &hdr); encode_nops(&hdr); return 0; } /* * FSINFO request */ static int nfs4_xdr_enc_fsinfo(struct rpc_rqst *req, __be32 *p, struct nfs4_fsinfo_arg *args) { struct xdr_stream xdr; struct compound_hdr hdr = { .minorversion = nfs4_xdr_minorversion(&args->seq_args), }; xdr_init_encode(&xdr, &req->rq_snd_buf, p); encode_compound_hdr(&xdr, req, &hdr); encode_sequence(&xdr, &args->seq_args, &hdr); encode_putfh(&xdr, args->fh, &hdr); encode_fsinfo(&xdr, args->bitmask, &hdr); encode_nops(&hdr); return 0; } /* * a PATHCONF request */ static int nfs4_xdr_enc_pathconf(struct rpc_rqst *req, __be32 *p, const struct nfs4_pathconf_arg *args) { struct xdr_stream xdr; struct compound_hdr hdr = { .minorversion = nfs4_xdr_minorversion(&args->seq_args), }; xdr_init_encode(&xdr, &req->rq_snd_buf, p); encode_compound_hdr(&xdr, req, &hdr); encode_sequence(&xdr, &args->seq_args, &hdr); encode_putfh(&xdr, args->fh, &hdr); encode_getattr_one(&xdr, args->bitmask[0] & nfs4_pathconf_bitmap[0], &hdr); encode_nops(&hdr); return 0; } /* * a STATFS request */ static int nfs4_xdr_enc_statfs(struct rpc_rqst *req, __be32 *p, const struct nfs4_statfs_arg *args) { struct xdr_stream xdr; struct compound_hdr hdr = { .minorversion = nfs4_xdr_minorversion(&args->seq_args), }; xdr_init_encode(&xdr, &req->rq_snd_buf, p); encode_compound_hdr(&xdr, req, &hdr); encode_sequence(&xdr, &args->seq_args, &hdr); encode_putfh(&xdr, args->fh, &hdr); encode_getattr_two(&xdr, args->bitmask[0] & nfs4_statfs_bitmap[0], args->bitmask[1] & nfs4_statfs_bitmap[1], &hdr); encode_nops(&hdr); return 0; } /* * GETATTR_BITMAP request */ static int nfs4_xdr_enc_server_caps(struct rpc_rqst *req, __be32 *p, struct nfs4_server_caps_arg *args) { struct xdr_stream xdr; struct compound_hdr hdr = { .minorversion = nfs4_xdr_minorversion(&args->seq_args), }; xdr_init_encode(&xdr, &req->rq_snd_buf, p); encode_compound_hdr(&xdr, req, &hdr); encode_sequence(&xdr, &args->seq_args, &hdr); encode_putfh(&xdr, args->fhandle, &hdr); encode_getattr_one(&xdr, FATTR4_WORD0_SUPPORTED_ATTRS| FATTR4_WORD0_LINK_SUPPORT| FATTR4_WORD0_SYMLINK_SUPPORT| FATTR4_WORD0_ACLSUPPORT, &hdr); encode_nops(&hdr); return 0; } /* * a RENEW request */ static int nfs4_xdr_enc_renew(struct rpc_rqst *req, __be32 *p, struct nfs_client *clp) { struct xdr_stream xdr; struct compound_hdr hdr = { .nops = 0, }; xdr_init_encode(&xdr, &req->rq_snd_buf, p); encode_compound_hdr(&xdr, req, &hdr); encode_renew(&xdr, clp, &hdr); encode_nops(&hdr); return 0; } /* * a SETCLIENTID request */ static int nfs4_xdr_enc_setclientid(struct rpc_rqst *req, __be32 *p, struct nfs4_setclientid *sc) { struct xdr_stream xdr; struct compound_hdr hdr = { .nops = 0, }; xdr_init_encode(&xdr, &req->rq_snd_buf, p); encode_compound_hdr(&xdr, req, &hdr); encode_setclientid(&xdr, sc, &hdr); encode_nops(&hdr); return 0; } /* * a SETCLIENTID_CONFIRM request */ static int nfs4_xdr_enc_setclientid_confirm(struct rpc_rqst *req, __be32 *p, struct nfs_client *clp) { struct xdr_stream xdr; struct compound_hdr hdr = { .nops = 0, }; const u32 lease_bitmap[2] = { FATTR4_WORD0_LEASE_TIME, 0 }; xdr_init_encode(&xdr, &req->rq_snd_buf, p); encode_compound_hdr(&xdr, req, &hdr); encode_setclientid_confirm(&xdr, clp, &hdr); encode_putrootfh(&xdr, &hdr); encode_fsinfo(&xdr, lease_bitmap, &hdr); encode_nops(&hdr); return 0; } /* * DELEGRETURN request */ static int nfs4_xdr_enc_delegreturn(struct rpc_rqst *req, __be32 *p, const struct nfs4_delegreturnargs *args) { struct xdr_stream xdr; struct compound_hdr hdr = { .minorversion = nfs4_xdr_minorversion(&args->seq_args), }; xdr_init_encode(&xdr, &req->rq_snd_buf, p); encode_compound_hdr(&xdr, req, &hdr); encode_sequence(&xdr, &args->seq_args, &hdr); encode_putfh(&xdr, args->fhandle, &hdr); encode_delegreturn(&xdr, args->stateid, &hdr); encode_getfattr(&xdr, args->bitmask, &hdr); encode_nops(&hdr); return 0; } /* * Encode FS_LOCATIONS request */ static int nfs4_xdr_enc_fs_locations(struct rpc_rqst *req, __be32 *p, struct nfs4_fs_locations_arg *args) { struct xdr_stream xdr; struct compound_hdr hdr = { .minorversion = nfs4_xdr_minorversion(&args->seq_args), }; uint32_t replen; xdr_init_encode(&xdr, &req->rq_snd_buf, p); encode_compound_hdr(&xdr, req, &hdr); encode_sequence(&xdr, &args->seq_args, &hdr); encode_putfh(&xdr, args->dir_fh, &hdr); encode_lookup(&xdr, args->name, &hdr); replen = hdr.replen; /* get the attribute into args->page */ encode_fs_locations(&xdr, args->bitmask, &hdr); xdr_inline_pages(&req->rq_rcv_buf, replen << 2, &args->page, 0, PAGE_SIZE); encode_nops(&hdr); return 0; } #if defined(CONFIG_NFS_V4_1) /* * EXCHANGE_ID request */ static int nfs4_xdr_enc_exchange_id(struct rpc_rqst *req, uint32_t *p, struct nfs41_exchange_id_args *args) { struct xdr_stream xdr; struct compound_hdr hdr = { .minorversion = args->client->cl_minorversion, }; xdr_init_encode(&xdr, &req->rq_snd_buf, p); encode_compound_hdr(&xdr, req, &hdr); encode_exchange_id(&xdr, args, &hdr); encode_nops(&hdr); return 0; } /* * a CREATE_SESSION request */ static int nfs4_xdr_enc_create_session(struct rpc_rqst *req, uint32_t *p, struct nfs41_create_session_args *args) { struct xdr_stream xdr; struct compound_hdr hdr = { .minorversion = args->client->cl_minorversion, }; xdr_init_encode(&xdr, &req->rq_snd_buf, p); encode_compound_hdr(&xdr, req, &hdr); encode_create_session(&xdr, args, &hdr); encode_nops(&hdr); return 0; } /* * a DESTROY_SESSION request */ static int nfs4_xdr_enc_destroy_session(struct rpc_rqst *req, uint32_t *p, struct nfs4_session *session) { struct xdr_stream xdr; struct compound_hdr hdr = { .minorversion = session->clp->cl_minorversion, }; xdr_init_encode(&xdr, &req->rq_snd_buf, p); encode_compound_hdr(&xdr, req, &hdr); encode_destroy_session(&xdr, session, &hdr); encode_nops(&hdr); return 0; } /* * a SEQUENCE request */ static int nfs4_xdr_enc_sequence(struct rpc_rqst *req, uint32_t *p, struct nfs4_sequence_args *args) { struct xdr_stream xdr; struct compound_hdr hdr = { .minorversion = nfs4_xdr_minorversion(args), }; xdr_init_encode(&xdr, &req->rq_snd_buf, p); encode_compound_hdr(&xdr, req, &hdr); encode_sequence(&xdr, args, &hdr); encode_nops(&hdr); return 0; } /* * a GET_LEASE_TIME request */ static int nfs4_xdr_enc_get_lease_time(struct rpc_rqst *req, uint32_t *p, struct nfs4_get_lease_time_args *args) { struct xdr_stream xdr; struct compound_hdr hdr = { .minorversion = nfs4_xdr_minorversion(&args->la_seq_args), }; const u32 lease_bitmap[2] = { FATTR4_WORD0_LEASE_TIME, 0 }; xdr_init_encode(&xdr, &req->rq_snd_buf, p); encode_compound_hdr(&xdr, req, &hdr); encode_sequence(&xdr, &args->la_seq_args, &hdr); encode_putrootfh(&xdr, &hdr); encode_fsinfo(&xdr, lease_bitmap, &hdr); encode_nops(&hdr); return 0; } #endif /* CONFIG_NFS_V4_1 */ static void print_overflow_msg(const char *func, const struct xdr_stream *xdr) { dprintk("nfs: %s: prematurely hit end of receive buffer. " "Remaining buffer length is %tu words.\n", func, xdr->end - xdr->p); } static int decode_opaque_inline(struct xdr_stream *xdr, unsigned int *len, char **string) { __be32 *p; p = xdr_inline_decode(xdr, 4); if (unlikely(!p)) goto out_overflow; *len = be32_to_cpup(p); p = xdr_inline_decode(xdr, *len); if (unlikely(!p)) goto out_overflow; *string = (char *)p; return 0; out_overflow: print_overflow_msg(__func__, xdr); return -EIO; } static int decode_compound_hdr(struct xdr_stream *xdr, struct compound_hdr *hdr) { __be32 *p; p = xdr_inline_decode(xdr, 8); if (unlikely(!p)) goto out_overflow; hdr->status = be32_to_cpup(p++); hdr->taglen = be32_to_cpup(p); p = xdr_inline_decode(xdr, hdr->taglen + 4); if (unlikely(!p)) goto out_overflow; hdr->tag = (char *)p; p += XDR_QUADLEN(hdr->taglen); hdr->nops = be32_to_cpup(p); if (unlikely(hdr->nops < 1)) return nfs4_stat_to_errno(hdr->status); return 0; out_overflow: print_overflow_msg(__func__, xdr); return -EIO; } static int decode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 expected) { __be32 *p; uint32_t opnum; int32_t nfserr; p = xdr_inline_decode(xdr, 8); if (unlikely(!p)) goto out_overflow; opnum = be32_to_cpup(p++); if (opnum != expected) { dprintk("nfs: Server returned operation" " %d but we issued a request for %d\n", opnum, expected); return -EIO; } nfserr = be32_to_cpup(p); if (nfserr != NFS_OK) return nfs4_stat_to_errno(nfserr); return 0; out_overflow: print_overflow_msg(__func__, xdr); return -EIO; } /* Dummy routine */ static int decode_ace(struct xdr_stream *xdr, void *ace, struct nfs_client *clp) { __be32 *p; unsigned int strlen; char *str; p = xdr_inline_decode(xdr, 12); if (likely(p)) return decode_opaque_inline(xdr, &strlen, &str); print_overflow_msg(__func__, xdr); return -EIO; } static int decode_attr_bitmap(struct xdr_stream *xdr, uint32_t *bitmap) { uint32_t bmlen; __be32 *p; p = xdr_inline_decode(xdr, 4); if (unlikely(!p)) goto out_overflow; bmlen = be32_to_cpup(p); bitmap[0] = bitmap[1] = 0; p = xdr_inline_decode(xdr, (bmlen << 2)); if (unlikely(!p)) goto out_overflow; if (bmlen > 0) { bitmap[0] = be32_to_cpup(p++); if (bmlen > 1) bitmap[1] = be32_to_cpup(p); } return 0; out_overflow: print_overflow_msg(__func__, xdr); return -EIO; } static inline int decode_attr_length(struct xdr_stream *xdr, uint32_t *attrlen, __be32 **savep) { __be32 *p; p = xdr_inline_decode(xdr, 4); if (unlikely(!p)) goto out_overflow; *attrlen = be32_to_cpup(p); *savep = xdr->p; return 0; out_overflow: print_overflow_msg(__func__, xdr); return -EIO; } static int decode_attr_supported(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *bitmask) { if (likely(bitmap[0] & FATTR4_WORD0_SUPPORTED_ATTRS)) { decode_attr_bitmap(xdr, bitmask); bitmap[0] &= ~FATTR4_WORD0_SUPPORTED_ATTRS; } else bitmask[0] = bitmask[1] = 0; dprintk("%s: bitmask=%08x:%08x\n", __func__, bitmask[0], bitmask[1]); return 0; } static int decode_attr_type(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *type) { __be32 *p; int ret = 0; *type = 0; if (unlikely(bitmap[0] & (FATTR4_WORD0_TYPE - 1U))) return -EIO; if (likely(bitmap[0] & FATTR4_WORD0_TYPE)) { p = xdr_inline_decode(xdr, 4); if (unlikely(!p)) goto out_overflow; *type = be32_to_cpup(p); if (*type < NF4REG || *type > NF4NAMEDATTR) { dprintk("%s: bad type %d\n", __func__, *type); return -EIO; } bitmap[0] &= ~FATTR4_WORD0_TYPE; ret = NFS_ATTR_FATTR_TYPE; } dprintk("%s: type=0%o\n", __func__, nfs_type2fmt[*type]); return ret; out_overflow: print_overflow_msg(__func__, xdr); return -EIO; } static int decode_attr_change(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *change) { __be32 *p; int ret = 0; *change = 0; if (unlikely(bitmap[0] & (FATTR4_WORD0_CHANGE - 1U))) return -EIO; if (likely(bitmap[0] & FATTR4_WORD0_CHANGE)) { p = xdr_inline_decode(xdr, 8); if (unlikely(!p)) goto out_overflow; xdr_decode_hyper(p, change); bitmap[0] &= ~FATTR4_WORD0_CHANGE; ret = NFS_ATTR_FATTR_CHANGE; } dprintk("%s: change attribute=%Lu\n", __func__, (unsigned long long)*change); return ret; out_overflow: print_overflow_msg(__func__, xdr); return -EIO; } static int decode_attr_size(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *size) { __be32 *p; int ret = 0; *size = 0; if (unlikely(bitmap[0] & (FATTR4_WORD0_SIZE - 1U))) return -EIO; if (likely(bitmap[0] & FATTR4_WORD0_SIZE)) { p = xdr_inline_decode(xdr, 8); if (unlikely(!p)) goto out_overflow; xdr_decode_hyper(p, size); bitmap[0] &= ~FATTR4_WORD0_SIZE; ret = NFS_ATTR_FATTR_SIZE; } dprintk("%s: file size=%Lu\n", __func__, (unsigned long long)*size); return ret; out_overflow: print_overflow_msg(__func__, xdr); return -EIO; } static int decode_attr_link_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res) { __be32 *p; *res = 0; if (unlikely(bitmap[0] & (FATTR4_WORD0_LINK_SUPPORT - 1U))) return -EIO; if (likely(bitmap[0] & FATTR4_WORD0_LINK_SUPPORT)) { p = xdr_inline_decode(xdr, 4); if (unlikely(!p)) goto out_overflow; *res = be32_to_cpup(p); bitmap[0] &= ~FATTR4_WORD0_LINK_SUPPORT; } dprintk("%s: link support=%s\n", __func__, *res == 0 ? "false" : "true"); return 0; out_overflow: print_overflow_msg(__func__, xdr); return -EIO; } static int decode_attr_symlink_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res) { __be32 *p; *res = 0; if (unlikely(bitmap[0] & (FATTR4_WORD0_SYMLINK_SUPPORT - 1U))) return -EIO; if (likely(bitmap[0] & FATTR4_WORD0_SYMLINK_SUPPORT)) { p = xdr_inline_decode(xdr, 4); if (unlikely(!p)) goto out_overflow; *res = be32_to_cpup(p); bitmap[0] &= ~FATTR4_WORD0_SYMLINK_SUPPORT; } dprintk("%s: symlink support=%s\n", __func__, *res == 0 ? "false" : "true"); return 0; out_overflow: print_overflow_msg(__func__, xdr); return -EIO; } static int decode_attr_fsid(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_fsid *fsid) { __be32 *p; int ret = 0; fsid->major = 0; fsid->minor = 0; if (unlikely(bitmap[0] & (FATTR4_WORD0_FSID - 1U))) return -EIO; if (likely(bitmap[0] & FATTR4_WORD0_FSID)) { p = xdr_inline_decode(xdr, 16); if (unlikely(!p)) goto out_overflow; p = xdr_decode_hyper(p, &fsid->major); xdr_decode_hyper(p, &fsid->minor); bitmap[0] &= ~FATTR4_WORD0_FSID; ret = NFS_ATTR_FATTR_FSID; } dprintk("%s: fsid=(0x%Lx/0x%Lx)\n", __func__, (unsigned long long)fsid->major, (unsigned long long)fsid->minor); return ret; out_overflow: print_overflow_msg(__func__, xdr); return -EIO; } static int decode_attr_lease_time(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res) { __be32 *p; *res = 60; if (unlikely(bitmap[0] & (FATTR4_WORD0_LEASE_TIME - 1U))) return -EIO; if (likely(bitmap[0] & FATTR4_WORD0_LEASE_TIME)) { p = xdr_inline_decode(xdr, 4); if (unlikely(!p)) goto out_overflow; *res = be32_to_cpup(p); bitmap[0] &= ~FATTR4_WORD0_LEASE_TIME; } dprintk("%s: file size=%u\n", __func__, (unsigned int)*res); return 0; out_overflow: print_overflow_msg(__func__, xdr); return -EIO; } static int decode_attr_aclsupport(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res) { __be32 *p; *res = ACL4_SUPPORT_ALLOW_ACL|ACL4_SUPPORT_DENY_ACL; if (unlikely(bitmap[0] & (FATTR4_WORD0_ACLSUPPORT - 1U))) return -EIO; if (likely(bitmap[0] & FATTR4_WORD0_ACLSUPPORT)) { p = xdr_inline_decode(xdr, 4); if (unlikely(!p)) goto out_overflow; *res = be32_to_cpup(p); bitmap[0] &= ~FATTR4_WORD0_ACLSUPPORT; } dprintk("%s: ACLs supported=%u\n", __func__, (unsigned int)*res); return 0; out_overflow: print_overflow_msg(__func__, xdr); return -EIO; } static int decode_attr_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid) { __be32 *p; int ret = 0; *fileid = 0; if (unlikely(bitmap[0] & (FATTR4_WORD0_FILEID - 1U))) return -EIO; if (likely(bitmap[0] & FATTR4_WORD0_FILEID)) { p = xdr_inline_decode(xdr, 8); if (unlikely(!p)) goto out_overflow; xdr_decode_hyper(p, fileid); bitmap[0] &= ~FATTR4_WORD0_FILEID; ret = NFS_ATTR_FATTR_FILEID; } dprintk("%s: fileid=%Lu\n", __func__, (unsigned long long)*fileid); return ret; out_overflow: print_overflow_msg(__func__, xdr); return -EIO; } static int decode_attr_mounted_on_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid) { __be32 *p; int ret = 0; *fileid = 0; if (unlikely(bitmap[1] & (FATTR4_WORD1_MOUNTED_ON_FILEID - 1U))) return -EIO; if (likely(bitmap[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)) { p = xdr_inline_decode(xdr, 8); if (unlikely(!p)) goto out_overflow; xdr_decode_hyper(p, fileid); bitmap[1] &= ~FATTR4_WORD1_MOUNTED_ON_FILEID; ret = NFS_ATTR_FATTR_FILEID; } dprintk("%s: fileid=%Lu\n", __func__, (unsigned long long)*fileid); return ret; out_overflow: print_overflow_msg(__func__, xdr); return -EIO; } static int decode_attr_files_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res) { __be32 *p; int status = 0; *res = 0; if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_AVAIL - 1U))) return -EIO; if (likely(bitmap[0] & FATTR4_WORD0_FILES_AVAIL)) { p = xdr_inline_decode(xdr, 8); if (unlikely(!p)) goto out_overflow; xdr_decode_hyper(p, res); bitmap[0] &= ~FATTR4_WORD0_FILES_AVAIL; } dprintk("%s: files avail=%Lu\n", __func__, (unsigned long long)*res); return status; out_overflow: print_overflow_msg(__func__, xdr); return -EIO; } static int decode_attr_files_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res) { __be32 *p; int status = 0; *res = 0; if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_FREE - 1U))) return -EIO; if (likely(bitmap[0] & FATTR4_WORD0_FILES_FREE)) { p = xdr_inline_decode(xdr, 8); if (unlikely(!p)) goto out_overflow; xdr_decode_hyper(p, res); bitmap[0] &= ~FATTR4_WORD0_FILES_FREE; } dprintk("%s: files free=%Lu\n", __func__, (unsigned long long)*res); return status; out_overflow: print_overflow_msg(__func__, xdr); return -EIO; } static int decode_attr_files_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res) { __be32 *p; int status = 0; *res = 0; if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_TOTAL - 1U))) return -EIO; if (likely(bitmap[0] & FATTR4_WORD0_FILES_TOTAL)) { p = xdr_inline_decode(xdr, 8); if (unlikely(!p)) goto out_overflow; xdr_decode_hyper(p, res); bitmap[0] &= ~FATTR4_WORD0_FILES_TOTAL; } dprintk("%s: files total=%Lu\n", __func__, (unsigned long long)*res); return status; out_overflow: print_overflow_msg(__func__, xdr); return -EIO; } static int decode_pathname(struct xdr_stream *xdr, struct nfs4_pathname *path) { u32 n; __be32 *p; int status = 0; p = xdr_inline_decode(xdr, 4); if (unlikely(!p)) goto out_overflow; n = be32_to_cpup(p); if (n == 0) goto root_path; dprintk("path "); path->ncomponents = 0; while (path->ncomponents < n) { struct nfs4_string *component = &path->components[path->ncomponents]; status = decode_opaque_inline(xdr, &component->len, &component->data); if (unlikely(status != 0)) goto out_eio; if (path->ncomponents != n) dprintk("/"); dprintk("%s", component->data); if (path->ncomponents < NFS4_PATHNAME_MAXCOMPONENTS) path->ncomponents++; else { dprintk("cannot parse %d components in path\n", n); goto out_eio; } } out: dprintk("\n"); return status; root_path: /* a root pathname is sent as a zero component4 */ path->ncomponents = 1; path->components[0].len=0; path->components[0].data=NULL; dprintk("path /\n"); goto out; out_eio: dprintk(" status %d", status); status = -EIO; goto out; out_overflow: print_overflow_msg(__func__, xdr); return -EIO; } static int decode_attr_fs_locations(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs4_fs_locations *res) { int n; __be32 *p; int status = -EIO; if (unlikely(bitmap[0] & (FATTR4_WORD0_FS_LOCATIONS -1U))) goto out; status = 0; if (unlikely(!(bitmap[0] & FATTR4_WORD0_FS_LOCATIONS))) goto out; dprintk("%s: fsroot ", __func__); status = decode_pathname(xdr, &res->fs_path); if (unlikely(status != 0)) goto out; p = xdr_inline_decode(xdr, 4); if (unlikely(!p)) goto out_overflow; n = be32_to_cpup(p); if (n <= 0) goto out_eio; res->nlocations = 0; while (res->nlocations < n) { u32 m; struct nfs4_fs_location *loc = &res->locations[res->nlocations]; p = xdr_inline_decode(xdr, 4); if (unlikely(!p)) goto out_overflow; m = be32_to_cpup(p); loc->nservers = 0; dprintk("%s: servers ", __func__); while (loc->nservers < m) { struct nfs4_string *server = &loc->servers[loc->nservers]; status = decode_opaque_inline(xdr, &server->len, &server->data); if (unlikely(status != 0)) goto out_eio; dprintk("%s ", server->data); if (loc->nservers < NFS4_FS_LOCATION_MAXSERVERS) loc->nservers++; else { unsigned int i; dprintk("%s: using first %u of %u servers " "returned for location %u\n", __func__, NFS4_FS_LOCATION_MAXSERVERS, m, res->nlocations); for (i = loc->nservers; i < m; i++) { unsigned int len; char *data; status = decode_opaque_inline(xdr, &len, &data); if (unlikely(status != 0)) goto out_eio; } } } status = decode_pathname(xdr, &loc->rootpath); if (unlikely(status != 0)) goto out_eio; if (res->nlocations < NFS4_FS_LOCATIONS_MAXENTRIES) res->nlocations++; } if (res->nlocations != 0) status = NFS_ATTR_FATTR_V4_REFERRAL; out: dprintk("%s: fs_locations done, error = %d\n", __func__, status); return status; out_overflow: print_overflow_msg(__func__, xdr); out_eio: status = -EIO; goto out; } static int decode_attr_maxfilesize(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res) { __be32 *p; int status = 0; *res = 0; if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXFILESIZE - 1U))) return -EIO; if (likely(bitmap[0] & FATTR4_WORD0_MAXFILESIZE)) { p = xdr_inline_decode(xdr, 8); if (unlikely(!p)) goto out_overflow; xdr_decode_hyper(p, res); bitmap[0] &= ~FATTR4_WORD0_MAXFILESIZE; } dprintk("%s: maxfilesize=%Lu\n", __func__, (unsigned long long)*res); return status; out_overflow: print_overflow_msg(__func__, xdr); return -EIO; } static int decode_attr_maxlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxlink) { __be32 *p; int status = 0; *maxlink = 1; if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXLINK - 1U))) return -EIO; if (likely(bitmap[0] & FATTR4_WORD0_MAXLINK)) { p = xdr_inline_decode(xdr, 4); if (unlikely(!p)) goto out_overflow; *maxlink = be32_to_cpup(p); bitmap[0] &= ~FATTR4_WORD0_MAXLINK; } dprintk("%s: maxlink=%u\n", __func__, *maxlink); return status; out_overflow: print_overflow_msg(__func__, xdr); return -EIO; } static int decode_attr_maxname(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxname) { __be32 *p; int status = 0; *maxname = 1024; if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXNAME - 1U))) return -EIO; if (likely(bitmap[0] & FATTR4_WORD0_MAXNAME)) { p = xdr_inline_decode(xdr, 4); if (unlikely(!p)) goto out_overflow; *maxname = be32_to_cpup(p); bitmap[0] &= ~FATTR4_WORD0_MAXNAME; } dprintk("%s: maxname=%u\n", __func__, *maxname); return status; out_overflow: print_overflow_msg(__func__, xdr); return -EIO; } static int decode_attr_maxread(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res) { __be32 *p; int status = 0; *res = 1024; if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXREAD - 1U))) return -EIO; if (likely(bitmap[0] & FATTR4_WORD0_MAXREAD)) { uint64_t maxread; p = xdr_inline_decode(xdr, 8); if (unlikely(!p)) goto out_overflow; xdr_decode_hyper(p, &maxread); if (maxread > 0x7FFFFFFF) maxread = 0x7FFFFFFF; *res = (uint32_t)maxread; bitmap[0] &= ~FATTR4_WORD0_MAXREAD; } dprintk("%s: maxread=%lu\n", __func__, (unsigned long)*res); return status; out_overflow: print_overflow_msg(__func__, xdr); return -EIO; } static int decode_attr_maxwrite(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res) { __be32 *p; int status = 0; *res = 1024; if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXWRITE - 1U))) return -EIO; if (likely(bitmap[0] & FATTR4_WORD0_MAXWRITE)) { uint64_t maxwrite; p = xdr_inline_decode(xdr, 8); if (unlikely(!p)) goto out_overflow; xdr_decode_hyper(p, &maxwrite); if (maxwrite > 0x7FFFFFFF) maxwrite = 0x7FFFFFFF; *res = (uint32_t)maxwrite; bitmap[0] &= ~FATTR4_WORD0_MAXWRITE; } dprintk("%s: maxwrite=%lu\n", __func__, (unsigned long)*res); return status; out_overflow: print_overflow_msg(__func__, xdr); return -EIO; } static int decode_attr_mode(struct xdr_stream *xdr, uint32_t *bitmap, umode_t *mode) { uint32_t tmp; __be32 *p; int ret = 0; *mode = 0; if (unlikely(bitmap[1] & (FATTR4_WORD1_MODE - 1U))) return -EIO; if (likely(bitmap[1] & FATTR4_WORD1_MODE)) { p = xdr_inline_decode(xdr, 4); if (unlikely(!p)) goto out_overflow; tmp = be32_to_cpup(p); *mode = tmp & ~S_IFMT; bitmap[1] &= ~FATTR4_WORD1_MODE; ret = NFS_ATTR_FATTR_MODE; } dprintk("%s: file mode=0%o\n", __func__, (unsigned int)*mode); return ret; out_overflow: print_overflow_msg(__func__, xdr); return -EIO; } static int decode_attr_nlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *nlink) { __be32 *p; int ret = 0; *nlink = 1; if (unlikely(bitmap[1] & (FATTR4_WORD1_NUMLINKS - 1U))) return -EIO; if (likely(bitmap[1] & FATTR4_WORD1_NUMLINKS)) { p = xdr_inline_decode(xdr, 4); if (unlikely(!p)) goto out_overflow; *nlink = be32_to_cpup(p); bitmap[1] &= ~FATTR4_WORD1_NUMLINKS; ret = NFS_ATTR_FATTR_NLINK; } dprintk("%s: nlink=%u\n", __func__, (unsigned int)*nlink); return ret; out_overflow: print_overflow_msg(__func__, xdr); return -EIO; } static int decode_attr_owner(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_client *clp, uint32_t *uid, int may_sleep) { uint32_t len; __be32 *p; int ret = 0; *uid = -2; if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER - 1U))) return -EIO; if (likely(bitmap[1] & FATTR4_WORD1_OWNER)) { p = xdr_inline_decode(xdr, 4); if (unlikely(!p)) goto out_overflow; len = be32_to_cpup(p); p = xdr_inline_decode(xdr, len); if (unlikely(!p)) goto out_overflow; if (!may_sleep) { /* do nothing */ } else if (len < XDR_MAX_NETOBJ) { if (nfs_map_name_to_uid(clp, (char *)p, len, uid) == 0) ret = NFS_ATTR_FATTR_OWNER; else dprintk("%s: nfs_map_name_to_uid failed!\n", __func__); } else dprintk("%s: name too long (%u)!\n", __func__, len); bitmap[1] &= ~FATTR4_WORD1_OWNER; } dprintk("%s: uid=%d\n", __func__, (int)*uid); return ret; out_overflow: print_overflow_msg(__func__, xdr); return -EIO; } static int decode_attr_group(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_client *clp, uint32_t *gid, int may_sleep) { uint32_t len; __be32 *p; int ret = 0; *gid = -2; if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER_GROUP - 1U))) return -EIO; if (likely(bitmap[1] & FATTR4_WORD1_OWNER_GROUP)) { p = xdr_inline_decode(xdr, 4); if (unlikely(!p)) goto out_overflow; len = be32_to_cpup(p); p = xdr_inline_decode(xdr, len); if (unlikely(!p)) goto out_overflow; if (!may_sleep) { /* do nothing */ } else if (len < XDR_MAX_NETOBJ) { if (nfs_map_group_to_gid(clp, (char *)p, len, gid) == 0) ret = NFS_ATTR_FATTR_GROUP; else dprintk("%s: nfs_map_group_to_gid failed!\n", __func__); } else dprintk("%s: name too long (%u)!\n", __func__, len); bitmap[1] &= ~FATTR4_WORD1_OWNER_GROUP; } dprintk("%s: gid=%d\n", __func__, (int)*gid); return ret; out_overflow: print_overflow_msg(__func__, xdr); return -EIO; } static int decode_attr_rdev(struct xdr_stream *xdr, uint32_t *bitmap, dev_t *rdev) { uint32_t major = 0, minor = 0; __be32 *p; int ret = 0; *rdev = MKDEV(0,0); if (unlikely(bitmap[1] & (FATTR4_WORD1_RAWDEV - 1U))) return -EIO; if (likely(bitmap[1] & FATTR4_WORD1_RAWDEV)) { dev_t tmp; p = xdr_inline_decode(xdr, 8); if (unlikely(!p)) goto out_overflow; major = be32_to_cpup(p++); minor = be32_to_cpup(p); tmp = MKDEV(major, minor); if (MAJOR(tmp) == major && MINOR(tmp) == minor) *rdev = tmp; bitmap[1] &= ~ FATTR4_WORD1_RAWDEV; ret = NFS_ATTR_FATTR_RDEV; } dprintk("%s: rdev=(0x%x:0x%x)\n", __func__, major, minor); return ret; out_overflow: print_overflow_msg(__func__, xdr); return -EIO; } static int decode_attr_space_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res) { __be32 *p; int status = 0; *res = 0; if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_AVAIL - 1U))) return -EIO; if (likely(bitmap[1] & FATTR4_WORD1_SPACE_AVAIL)) { p = xdr_inline_decode(xdr, 8); if (unlikely(!p)) goto out_overflow; xdr_decode_hyper(p, res); bitmap[1] &= ~FATTR4_WORD1_SPACE_AVAIL; } dprintk("%s: space avail=%Lu\n", __func__, (unsigned long long)*res); return status; out_overflow: print_overflow_msg(__func__, xdr); return -EIO; } static int decode_attr_space_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res) { __be32 *p; int status = 0; *res = 0; if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_FREE - 1U))) return -EIO; if (likely(bitmap[1] & FATTR4_WORD1_SPACE_FREE)) { p = xdr_inline_decode(xdr, 8); if (unlikely(!p)) goto out_overflow; xdr_decode_hyper(p, res); bitmap[1] &= ~FATTR4_WORD1_SPACE_FREE; } dprintk("%s: space free=%Lu\n", __func__, (unsigned long long)*res); return status; out_overflow: print_overflow_msg(__func__, xdr); return -EIO; } static int decode_attr_space_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res) { __be32 *p; int status = 0; *res = 0; if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_TOTAL - 1U))) return -EIO; if (likely(bitmap[1] & FATTR4_WORD1_SPACE_TOTAL)) { p = xdr_inline_decode(xdr, 8); if (unlikely(!p)) goto out_overflow; xdr_decode_hyper(p, res); bitmap[1] &= ~FATTR4_WORD1_SPACE_TOTAL; } dprintk("%s: space total=%Lu\n", __func__, (unsigned long long)*res); return status; out_overflow: print_overflow_msg(__func__, xdr); return -EIO; } static int decode_attr_space_used(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *used) { __be32 *p; int ret = 0; *used = 0; if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_USED - 1U))) return -EIO; if (likely(bitmap[1] & FATTR4_WORD1_SPACE_USED)) { p = xdr_inline_decode(xdr, 8); if (unlikely(!p)) goto out_overflow; xdr_decode_hyper(p, used); bitmap[1] &= ~FATTR4_WORD1_SPACE_USED; ret = NFS_ATTR_FATTR_SPACE_USED; } dprintk("%s: space used=%Lu\n", __func__, (unsigned long long)*used); return ret; out_overflow: print_overflow_msg(__func__, xdr); return -EIO; } static int decode_attr_time(struct xdr_stream *xdr, struct timespec *time) { __be32 *p; uint64_t sec; uint32_t nsec; p = xdr_inline_decode(xdr, 12); if (unlikely(!p)) goto out_overflow; p = xdr_decode_hyper(p, &sec); nsec = be32_to_cpup(p); time->tv_sec = (time_t)sec; time->tv_nsec = (long)nsec; return 0; out_overflow: print_overflow_msg(__func__, xdr); return -EIO; } static int decode_attr_time_access(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time) { int status = 0; time->tv_sec = 0; time->tv_nsec = 0; if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_ACCESS - 1U))) return -EIO; if (likely(bitmap[1] & FATTR4_WORD1_TIME_ACCESS)) { status = decode_attr_time(xdr, time); if (status == 0) status = NFS_ATTR_FATTR_ATIME; bitmap[1] &= ~FATTR4_WORD1_TIME_ACCESS; } dprintk("%s: atime=%ld\n", __func__, (long)time->tv_sec); return status; } static int decode_attr_time_metadata(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time) { int status = 0; time->tv_sec = 0; time->tv_nsec = 0; if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_METADATA - 1U))) return -EIO; if (likely(bitmap[1] & FATTR4_WORD1_TIME_METADATA)) { status = decode_attr_time(xdr, time); if (status == 0) status = NFS_ATTR_FATTR_CTIME; bitmap[1] &= ~FATTR4_WORD1_TIME_METADATA; } dprintk("%s: ctime=%ld\n", __func__, (long)time->tv_sec); return status; } static int decode_attr_time_modify(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time) { int status = 0; time->tv_sec = 0; time->tv_nsec = 0; if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_MODIFY - 1U))) return -EIO; if (likely(bitmap[1] & FATTR4_WORD1_TIME_MODIFY)) { status = decode_attr_time(xdr, time); if (status == 0) status = NFS_ATTR_FATTR_MTIME; bitmap[1] &= ~FATTR4_WORD1_TIME_MODIFY; } dprintk("%s: mtime=%ld\n", __func__, (long)time->tv_sec); return status; } static int verify_attr_len(struct xdr_stream *xdr, __be32 *savep, uint32_t attrlen) { unsigned int attrwords = XDR_QUADLEN(attrlen); unsigned int nwords = xdr->p - savep; if (unlikely(attrwords != nwords)) { dprintk("%s: server returned incorrect attribute length: " "%u %c %u\n", __func__, attrwords << 2, (attrwords < nwords) ? '<' : '>', nwords << 2); return -EIO; } return 0; } static int decode_change_info(struct xdr_stream *xdr, struct nfs4_change_info *cinfo) { __be32 *p; p = xdr_inline_decode(xdr, 20); if (unlikely(!p)) goto out_overflow; cinfo->atomic = be32_to_cpup(p++); p = xdr_decode_hyper(p, &cinfo->before); xdr_decode_hyper(p, &cinfo->after); return 0; out_overflow: print_overflow_msg(__func__, xdr); return -EIO; } static int decode_access(struct xdr_stream *xdr, struct nfs4_accessres *access) { __be32 *p; uint32_t supp, acc; int status; status = decode_op_hdr(xdr, OP_ACCESS); if (status) return status; p = xdr_inline_decode(xdr, 8); if (unlikely(!p)) goto out_overflow; supp = be32_to_cpup(p++); acc = be32_to_cpup(p); access->supported = supp; access->access = acc; return 0; out_overflow: print_overflow_msg(__func__, xdr); return -EIO; } static int decode_opaque_fixed(struct xdr_stream *xdr, void *buf, size_t len) { __be32 *p; p = xdr_inline_decode(xdr, len); if (likely(p)) { memcpy(buf, p, len); return 0; } print_overflow_msg(__func__, xdr); return -EIO; } static int decode_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid) { return decode_opaque_fixed(xdr, stateid->data, NFS4_STATEID_SIZE); } static int decode_close(struct xdr_stream *xdr, struct nfs_closeres *res) { int status; status = decode_op_hdr(xdr, OP_CLOSE); if (status != -EIO) nfs_increment_open_seqid(status, res->seqid); if (!status) status = decode_stateid(xdr, &res->stateid); return status; } static int decode_verifier(struct xdr_stream *xdr, void *verifier) { return decode_opaque_fixed(xdr, verifier, 8); } static int decode_commit(struct xdr_stream *xdr, struct nfs_writeres *res) { int status; status = decode_op_hdr(xdr, OP_COMMIT); if (!status) status = decode_verifier(xdr, res->verf->verifier); return status; } static int decode_create(struct xdr_stream *xdr, struct nfs4_change_info *cinfo) { __be32 *p; uint32_t bmlen; int status; status = decode_op_hdr(xdr, OP_CREATE); if (status) return status; if ((status = decode_change_info(xdr, cinfo))) return status; p = xdr_inline_decode(xdr, 4); if (unlikely(!p)) goto out_overflow; bmlen = be32_to_cpup(p); p = xdr_inline_decode(xdr, bmlen << 2); if (likely(p)) return 0; out_overflow: print_overflow_msg(__func__, xdr); return -EIO; } static int decode_server_caps(struct xdr_stream *xdr, struct nfs4_server_caps_res *res) { __be32 *savep; uint32_t attrlen, bitmap[2] = {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_link_support(xdr, bitmap, &res->has_links)) != 0) goto xdr_error; if ((status = decode_attr_symlink_support(xdr, bitmap, &res->has_symlinks)) != 0) goto xdr_error; if ((status = decode_attr_aclsupport(xdr, bitmap, &res->acl_bitmask)) != 0) goto xdr_error; status = verify_attr_len(xdr, savep, attrlen); xdr_error: dprintk("%s: xdr returned %d!\n", __func__, -status); return status; } static int decode_statfs(struct xdr_stream *xdr, struct nfs_fsstat *fsstat) { __be32 *savep; uint32_t attrlen, bitmap[2] = {0}; int status; if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0) goto xdr_error; if ((status = decode_attr_bitmap(xdr, bitmap)) != 0) goto xdr_error; if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0) goto xdr_error; if ((status = decode_attr_files_avail(xdr, bitmap, &fsstat->afiles)) != 0) goto xdr_error; if ((status = decode_attr_files_free(xdr, bitmap, &fsstat->ffiles)) != 0) goto xdr_error; if ((status = decode_attr_files_total(xdr, bitmap, &fsstat->tfiles)) != 0) goto xdr_error; if ((status = decode_attr_space_avail(xdr, bitmap, &fsstat->abytes)) != 0) goto xdr_error; if ((status = decode_attr_space_free(xdr, bitmap, &fsstat->fbytes)) != 0) goto xdr_error; if ((status = decode_attr_space_total(xdr, bitmap, &fsstat->tbytes)) != 0) goto xdr_error; status = verify_attr_len(xdr, savep, attrlen); xdr_error: dprintk("%s: xdr returned %d!\n", __func__, -status); return status; } static int decode_pathconf(struct xdr_stream *xdr, struct nfs_pathconf *pathconf) { __be32 *savep; uint32_t attrlen, bitmap[2] = {0}; int status; if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0) goto xdr_error; if ((status = decode_attr_bitmap(xdr, bitmap)) != 0) goto xdr_error; if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0) goto xdr_error; if ((status = decode_attr_maxlink(xdr, bitmap, &pathconf->max_link)) != 0) goto xdr_error; if ((status = decode_attr_maxname(xdr, bitmap, &pathconf->max_namelen)) != 0) goto xdr_error; status = verify_attr_len(xdr, savep, attrlen); xdr_error: dprintk("%s: xdr returned %d!\n", __func__, -status); return status; } static int decode_getfattr(struct xdr_stream *xdr, struct nfs_fattr *fattr, const struct nfs_server *server, int may_sleep) { __be32 *savep; uint32_t attrlen, bitmap[2] = {0}, type; int status; umode_t fmode = 0; uint64_t fileid; 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_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; status = decode_attr_fileid(xdr, bitmap, &fattr->fileid); if (status < 0) goto xdr_error; fattr->valid |= status; status = decode_attr_fs_locations(xdr, bitmap, container_of(fattr, struct nfs4_fs_locations, fattr)); if (status < 0) goto xdr_error; fattr->valid |= status; status = decode_attr_mode(xdr, bitmap, &fmode); if (status < 0) goto xdr_error; if (status != 0) { fattr->mode |= fmode; fattr->valid |= status; } status = decode_attr_nlink(xdr, bitmap, &fattr->nlink); if (status < 0) goto xdr_error; fattr->valid |= status; status = decode_attr_owner(xdr, bitmap, server->nfs_client, &fattr->uid, may_sleep); if (status < 0) goto xdr_error; fattr->valid |= status; status = decode_attr_group(xdr, bitmap, server->nfs_client, &fattr->gid, may_sleep); 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, &fileid); if (status < 0) goto xdr_error; if (status != 0 && !(fattr->valid & status)) { fattr->fileid = fileid; fattr->valid |= status; } status = verify_attr_len(xdr, savep, attrlen); xdr_error: dprintk("%s: xdr returned %d\n", __func__, -status); return status; } static int decode_fsinfo(struct xdr_stream *xdr, struct nfs_fsinfo *fsinfo) { __be32 *savep; uint32_t attrlen, bitmap[2]; int status; if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0) goto xdr_error; if ((status = decode_attr_bitmap(xdr, bitmap)) != 0) goto xdr_error; if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0) goto xdr_error; fsinfo->rtmult = fsinfo->wtmult = 512; /* ??? */ if ((status = decode_attr_lease_time(xdr, bitmap, &fsinfo->lease_time)) != 0) goto xdr_error; if ((status = decode_attr_maxfilesize(xdr, bitmap, &fsinfo->maxfilesize)) != 0) goto xdr_error; if ((status = decode_attr_maxread(xdr, bitmap, &fsinfo->rtmax)) != 0) goto xdr_error; fsinfo->rtpref = fsinfo->dtpref = fsinfo->rtmax; if ((status = decode_attr_maxwrite(xdr, bitmap, &fsinfo->wtmax)) != 0) goto xdr_error; fsinfo->wtpref = fsinfo->wtmax; status = verify_attr_len(xdr, savep, attrlen); xdr_error: dprintk("%s: xdr returned %d!\n", __func__, -status); return status; } static int decode_getfh(struct xdr_stream *xdr, struct nfs_fh *fh) { __be32 *p; uint32_t len; int status; /* Zero handle first to allow comparisons */ memset(fh, 0, sizeof(*fh)); status = decode_op_hdr(xdr, OP_GETFH); if (status) return status; p = xdr_inline_decode(xdr, 4); if (unlikely(!p)) goto out_overflow; len = be32_to_cpup(p); if (len > NFS4_FHSIZE) return -EIO; fh->size = len; p = xdr_inline_decode(xdr, len); if (unlikely(!p)) goto out_overflow; memcpy(fh->data, p, len); return 0; out_overflow: print_overflow_msg(__func__, xdr); return -EIO; } static int decode_link(struct xdr_stream *xdr, struct nfs4_change_info *cinfo) { int status; status = decode_op_hdr(xdr, OP_LINK); if (status) return status; return decode_change_info(xdr, cinfo); } /* * We create the owner, so we know a proper owner.id length is 4. */ static int decode_lock_denied (struct xdr_stream *xdr, struct file_lock *fl) { uint64_t offset, length, clientid; __be32 *p; uint32_t namelen, type; p = xdr_inline_decode(xdr, 32); if (unlikely(!p)) goto out_overflow; p = xdr_decode_hyper(p, &offset); p = xdr_decode_hyper(p, &length); type = be32_to_cpup(p++); if (fl != NULL) { fl->fl_start = (loff_t)offset; fl->fl_end = fl->fl_start + (loff_t)length - 1; if (length == ~(uint64_t)0) fl->fl_end = OFFSET_MAX; fl->fl_type = F_WRLCK; if (type & 1) fl->fl_type = F_RDLCK; fl->fl_pid = 0; } p = xdr_decode_hyper(p, &clientid); namelen = be32_to_cpup(p); p = xdr_inline_decode(xdr, namelen); if (likely(p)) return -NFS4ERR_DENIED; out_overflow: print_overflow_msg(__func__, xdr); return -EIO; } static int decode_lock(struct xdr_stream *xdr, struct nfs_lock_res *res) { int status; status = decode_op_hdr(xdr, OP_LOCK); if (status == -EIO) goto out; if (status == 0) { status = decode_stateid(xdr, &res->stateid); if (unlikely(status)) goto out; } else if (status == -NFS4ERR_DENIED) status = decode_lock_denied(xdr, NULL); if (res->open_seqid != NULL) nfs_increment_open_seqid(status, res->open_seqid); nfs_increment_lock_seqid(status, res->lock_seqid); out: return status; } static int decode_lockt(struct xdr_stream *xdr, struct nfs_lockt_res *res) { int status; status = decode_op_hdr(xdr, OP_LOCKT); if (status == -NFS4ERR_DENIED) return decode_lock_denied(xdr, res->denied); return status; } static int decode_locku(struct xdr_stream *xdr, struct nfs_locku_res *res) { int status; status = decode_op_hdr(xdr, OP_LOCKU); if (status != -EIO) nfs_increment_lock_seqid(status, res->seqid); if (status == 0) status = decode_stateid(xdr, &res->stateid); return status; } static int decode_lookup(struct xdr_stream *xdr) { return decode_op_hdr(xdr, OP_LOOKUP); } /* This is too sick! */ static int decode_space_limit(struct xdr_stream *xdr, u64 *maxsize) { __be32 *p; uint32_t limit_type, nblocks, blocksize; p = xdr_inline_decode(xdr, 12); if (unlikely(!p)) goto out_overflow; limit_type = be32_to_cpup(p++); switch (limit_type) { case 1: xdr_decode_hyper(p, maxsize); break; case 2: nblocks = be32_to_cpup(p++); blocksize = be32_to_cpup(p); *maxsize = (uint64_t)nblocks * (uint64_t)blocksize; } return 0; out_overflow: print_overflow_msg(__func__, xdr); return -EIO; } static int decode_delegation(struct xdr_stream *xdr, struct nfs_openres *res) { __be32 *p; uint32_t delegation_type; int status; p = xdr_inline_decode(xdr, 4); if (unlikely(!p)) goto out_overflow; delegation_type = be32_to_cpup(p); if (delegation_type == NFS4_OPEN_DELEGATE_NONE) { res->delegation_type = 0; return 0; } status = decode_stateid(xdr, &res->delegation); if (unlikely(status)) return status; p = xdr_inline_decode(xdr, 4); if (unlikely(!p)) goto out_overflow; res->do_recall = be32_to_cpup(p); switch (delegation_type) { case NFS4_OPEN_DELEGATE_READ: res->delegation_type = FMODE_READ; break; case NFS4_OPEN_DELEGATE_WRITE: res->delegation_type = FMODE_WRITE|FMODE_READ; if (decode_space_limit(xdr, &res->maxsize) < 0) return -EIO; } return decode_ace(xdr, NULL, res->server->nfs_client); out_overflow: print_overflow_msg(__func__, xdr); return -EIO; } static int decode_open(struct xdr_stream *xdr, struct nfs_openres *res) { __be32 *p; uint32_t savewords, bmlen, i; int status; status = decode_op_hdr(xdr, OP_OPEN); if (status != -EIO) nfs_increment_open_seqid(status, res->seqid); if (!status) status = decode_stateid(xdr, &res->stateid); if (unlikely(status)) return status; decode_change_info(xdr, &res->cinfo); p = xdr_inline_decode(xdr, 8); if (unlikely(!p)) goto out_overflow; res->rflags = be32_to_cpup(p++); bmlen = be32_to_cpup(p); if (bmlen > 10) goto xdr_error; p = xdr_inline_decode(xdr, bmlen << 2); if (unlikely(!p)) goto out_overflow; savewords = min_t(uint32_t, bmlen, NFS4_BITMAP_SIZE); for (i = 0; i < savewords; ++i) res->attrset[i] = be32_to_cpup(p++); for (; i < NFS4_BITMAP_SIZE; i++) res->attrset[i] = 0; return decode_delegation(xdr, res); xdr_error: dprintk("%s: Bitmap too large! Length = %u\n", __func__, bmlen); return -EIO; out_overflow: print_overflow_msg(__func__, xdr); return -EIO; } static int decode_open_confirm(struct xdr_stream *xdr, struct nfs_open_confirmres *res) { int status; status = decode_op_hdr(xdr, OP_OPEN_CONFIRM); if (status != -EIO) nfs_increment_open_seqid(status, res->seqid); if (!status) status = decode_stateid(xdr, &res->stateid); return status; } static int decode_open_downgrade(struct xdr_stream *xdr, struct nfs_closeres *res) { int status; status = decode_op_hdr(xdr, OP_OPEN_DOWNGRADE); if (status != -EIO) nfs_increment_open_seqid(status, res->seqid); if (!status) status = decode_stateid(xdr, &res->stateid); return status; } static int decode_putfh(struct xdr_stream *xdr) { return decode_op_hdr(xdr, OP_PUTFH); } static int decode_putrootfh(struct xdr_stream *xdr) { return decode_op_hdr(xdr, OP_PUTROOTFH); } static int decode_read(struct xdr_stream *xdr, struct rpc_rqst *req, struct nfs_readres *res) { struct kvec *iov = req->rq_rcv_buf.head; __be32 *p; uint32_t count, eof, recvd, hdrlen; int status; status = decode_op_hdr(xdr, OP_READ); if (status) return status; p = xdr_inline_decode(xdr, 8); if (unlikely(!p)) goto out_overflow; eof = be32_to_cpup(p++); count = be32_to_cpup(p); hdrlen = (u8 *) p - (u8 *) iov->iov_base; recvd = req->rq_rcv_buf.len - hdrlen; if (count > recvd) { dprintk("NFS: server cheating in read reply: " "count %u > recvd %u\n", count, recvd); count = recvd; eof = 0; } xdr_read_pages(xdr, count); res->eof = eof; res->count = count; return 0; out_overflow: print_overflow_msg(__func__, xdr); return -EIO; } static int decode_readdir(struct xdr_stream *xdr, struct rpc_rqst *req, struct nfs4_readdir_res *readdir) { struct xdr_buf *rcvbuf = &req->rq_rcv_buf; struct page *page = *rcvbuf->pages; struct kvec *iov = rcvbuf->head; size_t hdrlen; u32 recvd, pglen = rcvbuf->page_len; __be32 *end, *entry, *p, *kaddr; unsigned int nr = 0; int status; status = decode_op_hdr(xdr, OP_READDIR); if (!status) status = decode_verifier(xdr, readdir->verifier.data); if (unlikely(status)) return status; dprintk("%s: verifier = %08x:%08x\n", __func__, ((u32 *)readdir->verifier.data)[0], ((u32 *)readdir->verifier.data)[1]); hdrlen = (char *) xdr->p - (char *) iov->iov_base; recvd = rcvbuf->len - hdrlen; if (pglen > recvd) pglen = recvd; xdr_read_pages(xdr, pglen); BUG_ON(pglen + readdir->pgbase > PAGE_CACHE_SIZE); kaddr = p = kmap_atomic(page, KM_USER0); end = p + ((pglen + readdir->pgbase) >> 2); entry = p; /* Make sure the packet actually has a value_follows and EOF entry */ if ((entry + 1) > end) goto short_pkt; for (; *p++; nr++) { u32 len, attrlen, xlen; if (end - p < 3) goto short_pkt; dprintk("cookie = %Lu, ", *((unsigned long long *)p)); p += 2; /* cookie */ len = ntohl(*p++); /* filename length */ if (len > NFS4_MAXNAMLEN) { dprintk("NFS: giant filename in readdir (len 0x%x)\n", len); goto err_unmap; } xlen = XDR_QUADLEN(len); if (end - p < xlen + 1) goto short_pkt; dprintk("filename = %*s\n", len, (char *)p); p += xlen; len = ntohl(*p++); /* bitmap length */ if (end - p < len + 1) goto short_pkt; p += len; attrlen = XDR_QUADLEN(ntohl(*p++)); if (end - p < attrlen + 2) goto short_pkt; p += attrlen; /* attributes */ entry = p; } /* * Apparently some server sends responses that are a valid size, but * contain no entries, and have value_follows==0 and EOF==0. For * those, just set the EOF marker. */ if (!nr && entry[1] == 0) { dprintk("NFS: readdir reply truncated!\n"); entry[1] = 1; } out: kunmap_atomic(kaddr, KM_USER0); return 0; short_pkt: /* * When we get a short packet there are 2 possibilities. We can * return an error, or fix up the response to look like a valid * response and return what we have so far. If there are no * entries and the packet was short, then return -EIO. If there * are valid entries in the response, return them and pretend that * the call was successful, but incomplete. The caller can retry the * readdir starting at the last cookie. */ dprintk("%s: short packet at entry %d\n", __func__, nr); entry[0] = entry[1] = 0; if (nr) goto out; err_unmap: kunmap_atomic(kaddr, KM_USER0); return -errno_NFSERR_IO; } static int decode_readlink(struct xdr_stream *xdr, struct rpc_rqst *req) { struct xdr_buf *rcvbuf = &req->rq_rcv_buf; struct kvec *iov = rcvbuf->head; size_t hdrlen; u32 len, recvd; __be32 *p; char *kaddr; int status; status = decode_op_hdr(xdr, OP_READLINK); if (status) return status; /* Convert length of symlink */ p = xdr_inline_decode(xdr, 4); if (unlikely(!p)) goto out_overflow; len = be32_to_cpup(p); if (len >= rcvbuf->page_len || len <= 0) { dprintk("nfs: server returned giant symlink!\n"); return -ENAMETOOLONG; } hdrlen = (char *) xdr->p - (char *) iov->iov_base; recvd = req->rq_rcv_buf.len - hdrlen; if (recvd < len) { dprintk("NFS: server cheating in readlink reply: " "count %u > recvd %u\n", len, recvd); return -EIO; } xdr_read_pages(xdr, len); /* * The XDR encode routine has set things up so that * the link text will be copied directly into the * buffer. We just have to do overflow-checking, * and and null-terminate the text (the VFS expects * null-termination). */ kaddr = (char *)kmap_atomic(rcvbuf->pages[0], KM_USER0); kaddr[len+rcvbuf->page_base] = '\0'; kunmap_atomic(kaddr, KM_USER0); return 0; out_overflow: print_overflow_msg(__func__, xdr); return -EIO; } static int decode_remove(struct xdr_stream *xdr, struct nfs4_change_info *cinfo) { int status; status = decode_op_hdr(xdr, OP_REMOVE); if (status) goto out; status = decode_change_info(xdr, cinfo); out: return status; } static int decode_rename(struct xdr_stream *xdr, struct nfs4_change_info *old_cinfo, struct nfs4_change_info *new_cinfo) { int status; status = decode_op_hdr(xdr, OP_RENAME); if (status) goto out; if ((status = decode_change_info(xdr, old_cinfo))) goto out; status = decode_change_info(xdr, new_cinfo); out: return status; } static int decode_renew(struct xdr_stream *xdr) { return decode_op_hdr(xdr, OP_RENEW); } static int decode_restorefh(struct xdr_stream *xdr) { return decode_op_hdr(xdr, OP_RESTOREFH); } static int decode_getacl(struct xdr_stream *xdr, struct rpc_rqst *req, size_t *acl_len) { __be32 *savep; uint32_t attrlen, bitmap[2] = {0}; struct kvec *iov = req->rq_rcv_buf.head; int status; *acl_len = 0; if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0) goto out; if ((status = decode_attr_bitmap(xdr, bitmap)) != 0) goto out; if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0) goto out; if (unlikely(bitmap[0] & (FATTR4_WORD0_ACL - 1U))) return -EIO; if (likely(bitmap[0] & FATTR4_WORD0_ACL)) { size_t hdrlen; u32 recvd; /* We ignore &savep and don't do consistency checks on * the attr length. Let userspace figure it out.... */ hdrlen = (u8 *)xdr->p - (u8 *)iov->iov_base; recvd = req->rq_rcv_buf.len - hdrlen; if (attrlen > recvd) { dprintk("NFS: server cheating in getattr" " acl reply: attrlen %u > recvd %u\n", attrlen, recvd); return -EINVAL; } xdr_read_pages(xdr, attrlen); *acl_len = attrlen; } else status = -EOPNOTSUPP; out: return status; } static int decode_savefh(struct xdr_stream *xdr) { return decode_op_hdr(xdr, OP_SAVEFH); } static int decode_setattr(struct xdr_stream *xdr) { __be32 *p; uint32_t bmlen; int status; status = decode_op_hdr(xdr, OP_SETATTR); if (status) return status; p = xdr_inline_decode(xdr, 4); if (unlikely(!p)) goto out_overflow; bmlen = be32_to_cpup(p); p = xdr_inline_decode(xdr, bmlen << 2); if (likely(p)) return 0; out_overflow: print_overflow_msg(__func__, xdr); return -EIO; } static int decode_setclientid(struct xdr_stream *xdr, struct nfs_client *clp) { __be32 *p; uint32_t opnum; int32_t nfserr; p = xdr_inline_decode(xdr, 8); if (unlikely(!p)) goto out_overflow; opnum = be32_to_cpup(p++); if (opnum != OP_SETCLIENTID) { dprintk("nfs: decode_setclientid: Server returned operation" " %d\n", opnum); return -EIO; } nfserr = be32_to_cpup(p); if (nfserr == NFS_OK) { p = xdr_inline_decode(xdr, 8 + NFS4_VERIFIER_SIZE); if (unlikely(!p)) goto out_overflow; p = xdr_decode_hyper(p, &clp->cl_clientid); memcpy(clp->cl_confirm.data, p, NFS4_VERIFIER_SIZE); } else if (nfserr == NFSERR_CLID_INUSE) { uint32_t len; /* skip netid string */ p = xdr_inline_decode(xdr, 4); if (unlikely(!p)) goto out_overflow; len = be32_to_cpup(p); p = xdr_inline_decode(xdr, len); if (unlikely(!p)) goto out_overflow; /* skip uaddr string */ p = xdr_inline_decode(xdr, 4); if (unlikely(!p)) goto out_overflow; len = be32_to_cpup(p); p = xdr_inline_decode(xdr, len); if (unlikely(!p)) goto out_overflow; return -NFSERR_CLID_INUSE; } else return nfs4_stat_to_errno(nfserr); return 0; out_overflow: print_overflow_msg(__func__, xdr); return -EIO; } static int decode_setclientid_confirm(struct xdr_stream *xdr) { return decode_op_hdr(xdr, OP_SETCLIENTID_CONFIRM); } static int decode_write(struct xdr_stream *xdr, struct nfs_writeres *res) { __be32 *p; int status; status = decode_op_hdr(xdr, OP_WRITE); if (status) return status; p = xdr_inline_decode(xdr, 16); if (unlikely(!p)) goto out_overflow; res->count = be32_to_cpup(p++); res->verf->committed = be32_to_cpup(p++); memcpy(res->verf->verifier, p, 8); return 0; out_overflow: print_overflow_msg(__func__, xdr); return -EIO; } static int decode_delegreturn(struct xdr_stream *xdr) { return decode_op_hdr(xdr, OP_DELEGRETURN); } #if defined(CONFIG_NFS_V4_1) static int decode_exchange_id(struct xdr_stream *xdr, struct nfs41_exchange_id_res *res) { __be32 *p; uint32_t dummy; char *dummy_str; int status; struct nfs_client *clp = res->client; status = decode_op_hdr(xdr, OP_EXCHANGE_ID); if (status) return status; p = xdr_inline_decode(xdr, 8); if (unlikely(!p)) goto out_overflow; xdr_decode_hyper(p, &clp->cl_ex_clid); p = xdr_inline_decode(xdr, 12); if (unlikely(!p)) goto out_overflow; clp->cl_seqid = be32_to_cpup(p++); clp->cl_exchange_flags = be32_to_cpup(p++); /* We ask for SP4_NONE */ dummy = be32_to_cpup(p); if (dummy != SP4_NONE) return -EIO; /* Throw away minor_id */ p = xdr_inline_decode(xdr, 8); if (unlikely(!p)) goto out_overflow; /* Throw away Major id */ status = decode_opaque_inline(xdr, &dummy, &dummy_str); if (unlikely(status)) return status; /* Throw away server_scope */ status = decode_opaque_inline(xdr, &dummy, &dummy_str); if (unlikely(status)) return status; /* Throw away Implementation id array */ status = decode_opaque_inline(xdr, &dummy, &dummy_str); if (unlikely(status)) return status; return 0; out_overflow: print_overflow_msg(__func__, xdr); return -EIO; } static int decode_chan_attrs(struct xdr_stream *xdr, struct nfs4_channel_attrs *attrs) { __be32 *p; u32 nr_attrs; p = xdr_inline_decode(xdr, 28); if (unlikely(!p)) goto out_overflow; attrs->headerpadsz = be32_to_cpup(p++); attrs->max_rqst_sz = be32_to_cpup(p++); attrs->max_resp_sz = be32_to_cpup(p++); attrs->max_resp_sz_cached = be32_to_cpup(p++); attrs->max_ops = be32_to_cpup(p++); attrs->max_reqs = be32_to_cpup(p++); nr_attrs = be32_to_cpup(p); if (unlikely(nr_attrs > 1)) { printk(KERN_WARNING "%s: Invalid rdma channel attrs count %u\n", __func__, nr_attrs); return -EINVAL; } if (nr_attrs == 1) { p = xdr_inline_decode(xdr, 4); /* skip rdma_attrs */ if (unlikely(!p)) goto out_overflow; } return 0; out_overflow: print_overflow_msg(__func__, xdr); return -EIO; } static int decode_sessionid(struct xdr_stream *xdr, struct nfs4_sessionid *sid) { return decode_opaque_fixed(xdr, sid->data, NFS4_MAX_SESSIONID_LEN); } static int decode_create_session(struct xdr_stream *xdr, struct nfs41_create_session_res *res) { __be32 *p; int status; struct nfs_client *clp = res->client; struct nfs4_session *session = clp->cl_session; status = decode_op_hdr(xdr, OP_CREATE_SESSION); if (!status) status = decode_sessionid(xdr, &session->sess_id); if (unlikely(status)) return status; /* seqid, flags */ p = xdr_inline_decode(xdr, 8); if (unlikely(!p)) goto out_overflow; clp->cl_seqid = be32_to_cpup(p++); session->flags = be32_to_cpup(p); /* Channel attributes */ status = decode_chan_attrs(xdr, &session->fc_attrs); if (!status) status = decode_chan_attrs(xdr, &session->bc_attrs); return status; out_overflow: print_overflow_msg(__func__, xdr); return -EIO; } static int decode_destroy_session(struct xdr_stream *xdr, void *dummy) { return decode_op_hdr(xdr, OP_DESTROY_SESSION); } #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_slot *slot; struct nfs4_sessionid id; u32 dummy; int status; __be32 *p; if (!res->sr_session) return 0; status = decode_op_hdr(xdr, OP_SEQUENCE); if (!status) status = decode_sessionid(xdr, &id); if (unlikely(status)) goto out_err; /* * If the server returns different values for sessionID, slotID or * sequence number, the server is looney tunes. */ status = -EREMOTEIO; if (memcmp(id.data, res->sr_session->sess_id.data, NFS4_MAX_SESSIONID_LEN)) { dprintk("%s Invalid session id\n", __func__); goto out_err; } p = xdr_inline_decode(xdr, 20); if (unlikely(!p)) goto out_overflow; /* seqid */ slot = &res->sr_session->fc_slot_table.slots[res->sr_slotid]; dummy = be32_to_cpup(p++); if (dummy != slot->seq_nr) { dprintk("%s Invalid sequence number\n", __func__); goto out_err; } /* slot id */ dummy = be32_to_cpup(p++); if (dummy != res->sr_slotid) { dprintk("%s Invalid slot id\n", __func__); goto out_err; } /* highest slot id - currently not processed */ dummy = be32_to_cpup(p++); /* target highest slot id - currently not processed */ dummy = be32_to_cpup(p++); /* result flags - currently not processed */ dummy = be32_to_cpup(p); status = 0; out_err: res->sr_status = status; return status; out_overflow: print_overflow_msg(__func__, xdr); status = -EIO; goto out_err; #else /* CONFIG_NFS_V4_1 */ return 0; #endif /* CONFIG_NFS_V4_1 */ } /* * END OF "GENERIC" DECODE ROUTINES. */ /* * Decode OPEN_DOWNGRADE response */ static int nfs4_xdr_dec_open_downgrade(struct rpc_rqst *rqstp, __be32 *p, struct nfs_closeres *res) { struct xdr_stream xdr; struct compound_hdr hdr; int status; xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p); status = decode_compound_hdr(&xdr, &hdr); if (status) goto out; status = decode_sequence(&xdr, &res->seq_res, rqstp); if (status) goto out; status = decode_putfh(&xdr); if (status) goto out; status = decode_open_downgrade(&xdr, res); if (status != 0) goto out; decode_getfattr(&xdr, res->fattr, res->server, !RPC_IS_ASYNC(rqstp->rq_task)); out: return status; } /* * Decode ACCESS response */ static int nfs4_xdr_dec_access(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_accessres *res) { struct xdr_stream xdr; struct compound_hdr hdr; int status; xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p); status = decode_compound_hdr(&xdr, &hdr); if (status) goto out; status = decode_sequence(&xdr, &res->seq_res, rqstp); if (status) goto out; status = decode_putfh(&xdr); if (status != 0) goto out; status = decode_access(&xdr, res); if (status != 0) goto out; decode_getfattr(&xdr, res->fattr, res->server, !RPC_IS_ASYNC(rqstp->rq_task)); out: return status; } /* * Decode LOOKUP response */ static int nfs4_xdr_dec_lookup(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_lookup_res *res) { struct xdr_stream xdr; struct compound_hdr hdr; int status; xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p); status = decode_compound_hdr(&xdr, &hdr); if (status) goto out; status = decode_sequence(&xdr, &res->seq_res, rqstp); if (status) goto out; if ((status = decode_putfh(&xdr)) != 0) goto out; if ((status = decode_lookup(&xdr)) != 0) goto out; if ((status = decode_getfh(&xdr, res->fh)) != 0) goto out; status = decode_getfattr(&xdr, res->fattr, res->server ,!RPC_IS_ASYNC(rqstp->rq_task)); out: return status; } /* * Decode LOOKUP_ROOT response */ static int nfs4_xdr_dec_lookup_root(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_lookup_res *res) { struct xdr_stream xdr; struct compound_hdr hdr; int status; xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p); status = decode_compound_hdr(&xdr, &hdr); if (status) goto out; status = decode_sequence(&xdr, &res->seq_res, rqstp); if (status) goto out; if ((status = decode_putrootfh(&xdr)) != 0) goto out; if ((status = decode_getfh(&xdr, res->fh)) == 0) status = decode_getfattr(&xdr, res->fattr, res->server, !RPC_IS_ASYNC(rqstp->rq_task)); out: return status; } /* * Decode REMOVE response */ static int nfs4_xdr_dec_remove(struct rpc_rqst *rqstp, __be32 *p, struct nfs_removeres *res) { struct xdr_stream xdr; struct compound_hdr hdr; int status; xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p); status = decode_compound_hdr(&xdr, &hdr); if (status) goto out; status = decode_sequence(&xdr, &res->seq_res, rqstp); if (status) goto out; if ((status = decode_putfh(&xdr)) != 0) goto out; if ((status = decode_remove(&xdr, &res->cinfo)) != 0) goto out; decode_getfattr(&xdr, &res->dir_attr, res->server, !RPC_IS_ASYNC(rqstp->rq_task)); out: return status; } /* * Decode RENAME response */ static int nfs4_xdr_dec_rename(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_rename_res *res) { struct xdr_stream xdr; struct compound_hdr hdr; int status; xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p); status = decode_compound_hdr(&xdr, &hdr); if (status) goto out; status = decode_sequence(&xdr, &res->seq_res, rqstp); if (status) goto out; if ((status = decode_putfh(&xdr)) != 0) goto out; if ((status = decode_savefh(&xdr)) != 0) goto out; if ((status = decode_putfh(&xdr)) != 0) goto out; if ((status = decode_rename(&xdr, &res->old_cinfo, &res->new_cinfo)) != 0) goto out; /* Current FH is target directory */ if (decode_getfattr(&xdr, res->new_fattr, res->server, !RPC_IS_ASYNC(rqstp->rq_task)) != 0) goto out; if ((status = decode_restorefh(&xdr)) != 0) goto out; decode_getfattr(&xdr, res->old_fattr, res->server, !RPC_IS_ASYNC(rqstp->rq_task)); out: return status; } /* * Decode LINK response */ static int nfs4_xdr_dec_link(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_link_res *res) { struct xdr_stream xdr; struct compound_hdr hdr; int status; xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p); status = decode_compound_hdr(&xdr, &hdr); if (status) goto out; status = decode_sequence(&xdr, &res->seq_res, rqstp); if (status) goto out; if ((status = decode_putfh(&xdr)) != 0) goto out; if ((status = decode_savefh(&xdr)) != 0) goto out; if ((status = decode_putfh(&xdr)) != 0) goto out; if ((status = decode_link(&xdr, &res->cinfo)) != 0) goto out; /* * Note order: OP_LINK leaves the directory as the current * filehandle. */ if (decode_getfattr(&xdr, res->dir_attr, res->server, !RPC_IS_ASYNC(rqstp->rq_task)) != 0) goto out; if ((status = decode_restorefh(&xdr)) != 0) goto out; decode_getfattr(&xdr, res->fattr, res->server, !RPC_IS_ASYNC(rqstp->rq_task)); out: return status; } /* * Decode CREATE response */ static int nfs4_xdr_dec_create(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_create_res *res) { struct xdr_stream xdr; struct compound_hdr hdr; int status; xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p); status = decode_compound_hdr(&xdr, &hdr); if (status) goto out; status = decode_sequence(&xdr, &res->seq_res, rqstp); if (status) goto out; if ((status = decode_putfh(&xdr)) != 0) goto out; if ((status = decode_savefh(&xdr)) != 0) goto out; if ((status = decode_create(&xdr,&res->dir_cinfo)) != 0) goto out; if ((status = decode_getfh(&xdr, res->fh)) != 0) goto out; if (decode_getfattr(&xdr, res->fattr, res->server, !RPC_IS_ASYNC(rqstp->rq_task)) != 0) goto out; if ((status = decode_restorefh(&xdr)) != 0) goto out; decode_getfattr(&xdr, res->dir_fattr, res->server, !RPC_IS_ASYNC(rqstp->rq_task)); out: return status; } /* * Decode SYMLINK response */ static int nfs4_xdr_dec_symlink(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_create_res *res) { return nfs4_xdr_dec_create(rqstp, p, res); } /* * Decode GETATTR response */ static int nfs4_xdr_dec_getattr(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_getattr_res *res) { struct xdr_stream xdr; struct compound_hdr hdr; int status; xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p); status = decode_compound_hdr(&xdr, &hdr); if (status) goto out; status = decode_sequence(&xdr, &res->seq_res, rqstp); if (status) goto out; status = decode_putfh(&xdr); if (status) goto out; status = decode_getfattr(&xdr, res->fattr, res->server, !RPC_IS_ASYNC(rqstp->rq_task)); out: return status; } /* * Encode an SETACL request */ static int nfs4_xdr_enc_setacl(struct rpc_rqst *req, __be32 *p, struct nfs_setaclargs *args) { struct xdr_stream xdr; struct compound_hdr hdr = { .minorversion = nfs4_xdr_minorversion(&args->seq_args), }; int status; xdr_init_encode(&xdr, &req->rq_snd_buf, p); encode_compound_hdr(&xdr, req, &hdr); encode_sequence(&xdr, &args->seq_args, &hdr); encode_putfh(&xdr, args->fh, &hdr); status = encode_setacl(&xdr, args, &hdr); encode_nops(&hdr); return status; } /* * Decode SETACL response */ static int nfs4_xdr_dec_setacl(struct rpc_rqst *rqstp, __be32 *p, struct nfs_setaclres *res) { struct xdr_stream xdr; struct compound_hdr hdr; int status; xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p); status = decode_compound_hdr(&xdr, &hdr); if (status) goto out; status = decode_sequence(&xdr, &res->seq_res, rqstp); if (status) goto out; status = decode_putfh(&xdr); if (status) goto out; status = decode_setattr(&xdr); out: return status; } /* * Decode GETACL response */ static int nfs4_xdr_dec_getacl(struct rpc_rqst *rqstp, __be32 *p, struct nfs_getaclres *res) { struct xdr_stream xdr; struct compound_hdr hdr; int status; xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p); status = decode_compound_hdr(&xdr, &hdr); if (status) goto out; status = decode_sequence(&xdr, &res->seq_res, rqstp); if (status) goto out; status = decode_putfh(&xdr); if (status) goto out; status = decode_getacl(&xdr, rqstp, &res->acl_len); out: return status; } /* * Decode CLOSE response */ static int nfs4_xdr_dec_close(struct rpc_rqst *rqstp, __be32 *p, struct nfs_closeres *res) { struct xdr_stream xdr; struct compound_hdr hdr; int status; xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p); status = decode_compound_hdr(&xdr, &hdr); if (status) goto out; status = decode_sequence(&xdr, &res->seq_res, rqstp); if (status) goto out; status = decode_putfh(&xdr); if (status) goto out; status = decode_close(&xdr, res); if (status != 0) goto out; /* * Note: Server may do delete on close for this file * in which case the getattr call will fail with * an ESTALE error. Shouldn't be a problem, * though, since fattr->valid will remain unset. */ decode_getfattr(&xdr, res->fattr, res->server, !RPC_IS_ASYNC(rqstp->rq_task)); out: return status; } /* * Decode OPEN response */ static int nfs4_xdr_dec_open(struct rpc_rqst *rqstp, __be32 *p, struct nfs_openres *res) { struct xdr_stream xdr; struct compound_hdr hdr; int status; xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p); status = decode_compound_hdr(&xdr, &hdr); if (status) goto out; status = decode_sequence(&xdr, &res->seq_res, rqstp); if (status) goto out; status = decode_putfh(&xdr); if (status) goto out; status = decode_savefh(&xdr); if (status) goto out; status = decode_open(&xdr, res); if (status) goto out; if (decode_getfh(&xdr, &res->fh) != 0) goto out; if (decode_getfattr(&xdr, res->f_attr, res->server, !RPC_IS_ASYNC(rqstp->rq_task)) != 0) goto out; if (decode_restorefh(&xdr) != 0) goto out; decode_getfattr(&xdr, res->dir_attr, res->server, !RPC_IS_ASYNC(rqstp->rq_task)); out: return status; } /* * Decode OPEN_CONFIRM response */ static int nfs4_xdr_dec_open_confirm(struct rpc_rqst *rqstp, __be32 *p, struct nfs_open_confirmres *res) { struct xdr_stream xdr; struct compound_hdr hdr; int status; xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p); status = decode_compound_hdr(&xdr, &hdr); if (status) goto out; status = decode_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, __be32 *p, struct nfs_openres *res) { struct xdr_stream xdr; struct compound_hdr hdr; int status; xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p); status = decode_compound_hdr(&xdr, &hdr); if (status) goto out; status = decode_sequence(&xdr, &res->seq_res, rqstp); if (status) goto out; status = decode_putfh(&xdr); if (status) goto out; status = decode_open(&xdr, res); if (status) goto out; decode_getfattr(&xdr, res->f_attr, res->server, !RPC_IS_ASYNC(rqstp->rq_task)); out: return status; } /* * Decode SETATTR response */ static int nfs4_xdr_dec_setattr(struct rpc_rqst *rqstp, __be32 *p, struct nfs_setattrres *res) { struct xdr_stream xdr; struct compound_hdr hdr; int status; xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p); status = decode_compound_hdr(&xdr, &hdr); if (status) goto out; status = decode_sequence(&xdr, &res->seq_res, rqstp); if (status) goto out; status = decode_putfh(&xdr); if (status) goto out; status = decode_setattr(&xdr); if (status) goto out; decode_getfattr(&xdr, res->fattr, res->server, !RPC_IS_ASYNC(rqstp->rq_task)); out: return status; } /* * Decode LOCK response */ static int nfs4_xdr_dec_lock(struct rpc_rqst *rqstp, __be32 *p, struct nfs_lock_res *res) { struct xdr_stream xdr; struct compound_hdr hdr; int status; xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p); status = decode_compound_hdr(&xdr, &hdr); if (status) goto out; status = decode_sequence(&xdr, &res->seq_res, rqstp); if (status) goto out; status = decode_putfh(&xdr); if (status) goto out; status = decode_lock(&xdr, res); out: return status; } /* * Decode LOCKT response */ static int nfs4_xdr_dec_lockt(struct rpc_rqst *rqstp, __be32 *p, struct nfs_lockt_res *res) { struct xdr_stream xdr; struct compound_hdr hdr; int status; xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p); status = decode_compound_hdr(&xdr, &hdr); if (status) goto out; status = decode_sequence(&xdr, &res->seq_res, rqstp); if (status) goto out; status = decode_putfh(&xdr); if (status) goto out; status = decode_lockt(&xdr, res); out: return status; } /* * Decode LOCKU response */ static int nfs4_xdr_dec_locku(struct rpc_rqst *rqstp, __be32 *p, struct nfs_locku_res *res) { struct xdr_stream xdr; struct compound_hdr hdr; int status; xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p); status = decode_compound_hdr(&xdr, &hdr); if (status) goto out; status = decode_sequence(&xdr, &res->seq_res, rqstp); if (status) goto out; status = decode_putfh(&xdr); if (status) goto out; status = decode_locku(&xdr, res); out: return status; } /* * Decode READLINK response */ static int nfs4_xdr_dec_readlink(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_readlink_res *res) { struct xdr_stream xdr; struct compound_hdr hdr; int status; xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p); status = decode_compound_hdr(&xdr, &hdr); if (status) goto out; status = decode_sequence(&xdr, &res->seq_res, rqstp); if (status) goto out; status = decode_putfh(&xdr); if (status) goto out; status = decode_readlink(&xdr, rqstp); out: return status; } /* * Decode READDIR response */ static int nfs4_xdr_dec_readdir(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_readdir_res *res) { struct xdr_stream xdr; struct compound_hdr hdr; int status; xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p); status = decode_compound_hdr(&xdr, &hdr); if (status) goto out; status = decode_sequence(&xdr, &res->seq_res, rqstp); if (status) goto out; status = decode_putfh(&xdr); if (status) goto out; status = decode_readdir(&xdr, rqstp, res); out: return status; } /* * Decode Read response */ static int nfs4_xdr_dec_read(struct rpc_rqst *rqstp, __be32 *p, struct nfs_readres *res) { struct xdr_stream xdr; struct compound_hdr hdr; int status; xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p); status = decode_compound_hdr(&xdr, &hdr); if (status) goto out; status = decode_sequence(&xdr, &res->seq_res, rqstp); if (status) goto out; status = decode_putfh(&xdr); if (status) goto out; status = decode_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, __be32 *p, struct nfs_writeres *res) { struct xdr_stream xdr; struct compound_hdr hdr; int status; xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p); status = decode_compound_hdr(&xdr, &hdr); if (status) goto out; status = decode_sequence(&xdr, &res->seq_res, rqstp); if (status) goto out; status = decode_putfh(&xdr); if (status) goto out; status = decode_write(&xdr, res); if (status) goto out; decode_getfattr(&xdr, res->fattr, res->server, !RPC_IS_ASYNC(rqstp->rq_task)); if (!status) status = res->count; out: return status; } /* * Decode COMMIT response */ static int nfs4_xdr_dec_commit(struct rpc_rqst *rqstp, __be32 *p, struct nfs_writeres *res) { struct xdr_stream xdr; struct compound_hdr hdr; int status; xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p); status = decode_compound_hdr(&xdr, &hdr); if (status) goto out; status = decode_sequence(&xdr, &res->seq_res, rqstp); if (status) goto out; status = decode_putfh(&xdr); if (status) goto out; status = decode_commit(&xdr, res); if (status) goto out; decode_getfattr(&xdr, res->fattr, res->server, !RPC_IS_ASYNC(rqstp->rq_task)); out: return status; } /* * FSINFO request */ static int nfs4_xdr_dec_fsinfo(struct rpc_rqst *req, __be32 *p, struct nfs4_fsinfo_res *res) { struct xdr_stream xdr; struct compound_hdr hdr; int status; xdr_init_decode(&xdr, &req->rq_rcv_buf, p); status = decode_compound_hdr(&xdr, &hdr); if (!status) status = decode_sequence(&xdr, &res->seq_res, req); if (!status) status = decode_putfh(&xdr); if (!status) status = decode_fsinfo(&xdr, res->fsinfo); return status; } /* * PATHCONF request */ static int nfs4_xdr_dec_pathconf(struct rpc_rqst *req, __be32 *p, struct nfs4_pathconf_res *res) { struct xdr_stream xdr; struct compound_hdr hdr; int status; xdr_init_decode(&xdr, &req->rq_rcv_buf, p); status = decode_compound_hdr(&xdr, &hdr); if (!status) status = decode_sequence(&xdr, &res->seq_res, req); if (!status) status = decode_putfh(&xdr); if (!status) status = decode_pathconf(&xdr, res->pathconf); return status; } /* * STATFS request */ static int nfs4_xdr_dec_statfs(struct rpc_rqst *req, __be32 *p, struct nfs4_statfs_res *res) { struct xdr_stream xdr; struct compound_hdr hdr; int status; xdr_init_decode(&xdr, &req->rq_rcv_buf, p); status = decode_compound_hdr(&xdr, &hdr); if (!status) status = decode_sequence(&xdr, &res->seq_res, req); if (!status) status = decode_putfh(&xdr); if (!status) status = decode_statfs(&xdr, res->fsstat); return status; } /* * GETATTR_BITMAP request */ static int nfs4_xdr_dec_server_caps(struct rpc_rqst *req, __be32 *p, struct nfs4_server_caps_res *res) { struct xdr_stream xdr; struct compound_hdr hdr; int status; xdr_init_decode(&xdr, &req->rq_rcv_buf, p); status = decode_compound_hdr(&xdr, &hdr); if (status) goto out; status = decode_sequence(&xdr, &res->seq_res, req); if (status) goto out; if ((status = decode_putfh(&xdr)) != 0) goto out; status = decode_server_caps(&xdr, res); out: return status; } /* * Decode RENEW response */ static int nfs4_xdr_dec_renew(struct rpc_rqst *rqstp, __be32 *p, void *dummy) { struct xdr_stream xdr; struct compound_hdr hdr; int status; xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p); status = decode_compound_hdr(&xdr, &hdr); if (!status) status = decode_renew(&xdr); return status; } /* * a SETCLIENTID request */ static int nfs4_xdr_dec_setclientid(struct rpc_rqst *req, __be32 *p, struct nfs_client *clp) { struct xdr_stream xdr; struct compound_hdr hdr; int status; xdr_init_decode(&xdr, &req->rq_rcv_buf, p); status = decode_compound_hdr(&xdr, &hdr); if (!status) status = decode_setclientid(&xdr, clp); return status; } /* * a SETCLIENTID_CONFIRM request */ static int nfs4_xdr_dec_setclientid_confirm(struct rpc_rqst *req, __be32 *p, struct nfs_fsinfo *fsinfo) { struct xdr_stream xdr; struct compound_hdr hdr; int status; xdr_init_decode(&xdr, &req->rq_rcv_buf, p); status = decode_compound_hdr(&xdr, &hdr); if (!status) status = decode_setclientid_confirm(&xdr); if (!status) status = decode_putrootfh(&xdr); if (!status) status = decode_fsinfo(&xdr, fsinfo); return status; } /* * DELEGRETURN request */ static int nfs4_xdr_dec_delegreturn(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_delegreturnres *res) { struct xdr_stream xdr; struct compound_hdr hdr; int status; xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p); status = decode_compound_hdr(&xdr, &hdr); if (status) goto out; status = decode_sequence(&xdr, &res->seq_res, rqstp); if (status) goto out; status = decode_putfh(&xdr); if (status != 0) goto out; status = decode_delegreturn(&xdr); decode_getfattr(&xdr, res->fattr, res->server, !RPC_IS_ASYNC(rqstp->rq_task)); out: return status; } /* * FS_LOCATIONS request */ static int nfs4_xdr_dec_fs_locations(struct rpc_rqst *req, __be32 *p, struct nfs4_fs_locations_res *res) { struct xdr_stream xdr; struct compound_hdr hdr; int status; xdr_init_decode(&xdr, &req->rq_rcv_buf, p); status = decode_compound_hdr(&xdr, &hdr); if (status) goto out; status = decode_sequence(&xdr, &res->seq_res, req); if (status) goto out; if ((status = decode_putfh(&xdr)) != 0) goto out; if ((status = decode_lookup(&xdr)) != 0) goto out; xdr_enter_page(&xdr, PAGE_SIZE); status = decode_getfattr(&xdr, &res->fs_locations->fattr, res->fs_locations->server, !RPC_IS_ASYNC(req->rq_task)); out: return status; } #if defined(CONFIG_NFS_V4_1) /* * EXCHANGE_ID request */ static int nfs4_xdr_dec_exchange_id(struct rpc_rqst *rqstp, uint32_t *p, void *res) { struct xdr_stream xdr; struct compound_hdr hdr; int status; xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p); status = decode_compound_hdr(&xdr, &hdr); if (!status) status = decode_exchange_id(&xdr, res); return status; } /* * a CREATE_SESSION request */ static int nfs4_xdr_dec_create_session(struct rpc_rqst *rqstp, uint32_t *p, struct nfs41_create_session_res *res) { struct xdr_stream xdr; struct compound_hdr hdr; int status; xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p); status = decode_compound_hdr(&xdr, &hdr); if (!status) status = decode_create_session(&xdr, res); return status; } /* * a DESTROY_SESSION request */ static int nfs4_xdr_dec_destroy_session(struct rpc_rqst *rqstp, uint32_t *p, void *dummy) { struct xdr_stream xdr; struct compound_hdr hdr; int status; xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p); status = decode_compound_hdr(&xdr, &hdr); if (!status) status = decode_destroy_session(&xdr, dummy); return status; } /* * a SEQUENCE request */ static int nfs4_xdr_dec_sequence(struct rpc_rqst *rqstp, uint32_t *p, struct nfs4_sequence_res *res) { struct xdr_stream xdr; struct compound_hdr hdr; int status; xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p); status = decode_compound_hdr(&xdr, &hdr); if (!status) status = decode_sequence(&xdr, res, rqstp); return status; } /* * a GET_LEASE_TIME request */ static int nfs4_xdr_dec_get_lease_time(struct rpc_rqst *rqstp, uint32_t *p, struct nfs4_get_lease_time_res *res) { struct xdr_stream xdr; struct compound_hdr hdr; int status; xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p); status = decode_compound_hdr(&xdr, &hdr); if (!status) status = decode_sequence(&xdr, &res->lr_seq_res, rqstp); if (!status) status = decode_putrootfh(&xdr); if (!status) status = decode_fsinfo(&xdr, res->lr_fsinfo); return status; } #endif /* CONFIG_NFS_V4_1 */ __be32 *nfs4_decode_dirent(__be32 *p, struct nfs_entry *entry, int plus) { uint32_t bitmap[2] = {0}; uint32_t len; if (!*p++) { if (!*p) return ERR_PTR(-EAGAIN); entry->eof = 1; return ERR_PTR(-EBADCOOKIE); } entry->prev_cookie = entry->cookie; p = xdr_decode_hyper(p, &entry->cookie); entry->len = ntohl(*p++); entry->name = (const char *) p; p += XDR_QUADLEN(entry->len); /* * In case the server doesn't return an inode number, * we fake one here. (We don't use inode number 0, * since glibc seems to choke on it...) */ entry->ino = 1; len = ntohl(*p++); /* bitmap length */ if (len-- > 0) { bitmap[0] = ntohl(*p++); if (len-- > 0) { bitmap[1] = ntohl(*p++); p += len; } } len = XDR_QUADLEN(ntohl(*p++)); /* attribute buffer length */ if (len > 0) { if (bitmap[0] & FATTR4_WORD0_RDATTR_ERROR) { bitmap[0] &= ~FATTR4_WORD0_RDATTR_ERROR; /* Ignore the return value of rdattr_error for now */ p++; len--; } if (bitmap[0] == 0 && bitmap[1] == FATTR4_WORD1_MOUNTED_ON_FILEID) xdr_decode_hyper(p, &entry->ino); else if (bitmap[0] == FATTR4_WORD0_FILEID) xdr_decode_hyper(p, &entry->ino); p += len; } entry->eof = !p[0] && p[1]; return p; } /* * We need to translate between nfs status return values and * the local errno values which may not be the same. */ static struct { int stat; int errno; } nfs_errtbl[] = { { NFS4_OK, 0 }, { NFS4ERR_PERM, -EPERM }, { NFS4ERR_NOENT, -ENOENT }, { NFS4ERR_IO, -errno_NFSERR_IO}, { NFS4ERR_NXIO, -ENXIO }, { NFS4ERR_ACCESS, -EACCES }, { NFS4ERR_EXIST, -EEXIST }, { NFS4ERR_XDEV, -EXDEV }, { NFS4ERR_NOTDIR, -ENOTDIR }, { NFS4ERR_ISDIR, -EISDIR }, { NFS4ERR_INVAL, -EINVAL }, { NFS4ERR_FBIG, -EFBIG }, { NFS4ERR_NOSPC, -ENOSPC }, { NFS4ERR_ROFS, -EROFS }, { NFS4ERR_MLINK, -EMLINK }, { NFS4ERR_NAMETOOLONG, -ENAMETOOLONG }, { NFS4ERR_NOTEMPTY, -ENOTEMPTY }, { NFS4ERR_DQUOT, -EDQUOT }, { NFS4ERR_STALE, -ESTALE }, { NFS4ERR_BADHANDLE, -EBADHANDLE }, { NFS4ERR_BADOWNER, -EINVAL }, { NFS4ERR_BADNAME, -EINVAL }, { NFS4ERR_BAD_COOKIE, -EBADCOOKIE }, { NFS4ERR_NOTSUPP, -ENOTSUPP }, { NFS4ERR_TOOSMALL, -ETOOSMALL }, { NFS4ERR_SERVERFAULT, -EREMOTEIO }, { NFS4ERR_BADTYPE, -EBADTYPE }, { NFS4ERR_LOCKED, -EAGAIN }, { NFS4ERR_SYMLINK, -ELOOP }, { NFS4ERR_OP_ILLEGAL, -EOPNOTSUPP }, { NFS4ERR_DEADLOCK, -EDEADLK }, { NFS4ERR_WRONGSEC, -EPERM }, /* FIXME: this needs * to be handled by a * middle-layer. */ { -1, -EIO } }; /* * Convert an NFS error code to a local one. * This one is used jointly by NFSv2 and NFSv3. */ static int nfs4_stat_to_errno(int stat) { int i; for (i = 0; nfs_errtbl[i].stat != -1; i++) { if (nfs_errtbl[i].stat == stat) return nfs_errtbl[i].errno; } if (stat <= 10000 || stat > 10100) { /* The server is looney tunes. */ return -EREMOTEIO; } /* If we cannot translate the error, the recovery routines should * handle it. * Note: remaining NFSv4 error codes have values > 10000, so should * not conflict with native Linux error codes. */ return -stat; } #define PROC(proc, argtype, restype) \ [NFSPROC4_CLNT_##proc] = { \ .p_proc = NFSPROC4_COMPOUND, \ .p_encode = (kxdrproc_t) nfs4_xdr_##argtype, \ .p_decode = (kxdrproc_t) nfs4_xdr_##restype, \ .p_arglen = NFS4_##argtype##_sz, \ .p_replen = NFS4_##restype##_sz, \ .p_statidx = NFSPROC4_CLNT_##proc, \ .p_name = #proc, \ } struct rpc_procinfo nfs4_procedures[] = { PROC(READ, enc_read, dec_read), PROC(WRITE, enc_write, dec_write), PROC(COMMIT, enc_commit, dec_commit), PROC(OPEN, enc_open, dec_open), PROC(OPEN_CONFIRM, enc_open_confirm, dec_open_confirm), PROC(OPEN_NOATTR, enc_open_noattr, dec_open_noattr), PROC(OPEN_DOWNGRADE, enc_open_downgrade, dec_open_downgrade), PROC(CLOSE, enc_close, dec_close), PROC(SETATTR, enc_setattr, dec_setattr), PROC(FSINFO, enc_fsinfo, dec_fsinfo), PROC(RENEW, enc_renew, dec_renew), PROC(SETCLIENTID, enc_setclientid, dec_setclientid), PROC(SETCLIENTID_CONFIRM, enc_setclientid_confirm, dec_setclientid_confirm), PROC(LOCK, enc_lock, dec_lock), PROC(LOCKT, enc_lockt, dec_lockt), PROC(LOCKU, enc_locku, dec_locku), PROC(ACCESS, enc_access, dec_access), PROC(GETATTR, enc_getattr, dec_getattr), PROC(LOOKUP, enc_lookup, dec_lookup), PROC(LOOKUP_ROOT, enc_lookup_root, dec_lookup_root), PROC(REMOVE, enc_remove, dec_remove), PROC(RENAME, enc_rename, dec_rename), PROC(LINK, enc_link, dec_link), PROC(SYMLINK, enc_symlink, dec_symlink), PROC(CREATE, enc_create, dec_create), PROC(PATHCONF, enc_pathconf, dec_pathconf), PROC(STATFS, enc_statfs, dec_statfs), PROC(READLINK, enc_readlink, dec_readlink), PROC(READDIR, enc_readdir, dec_readdir), PROC(SERVER_CAPS, enc_server_caps, dec_server_caps), PROC(DELEGRETURN, enc_delegreturn, dec_delegreturn), PROC(GETACL, enc_getacl, dec_getacl), PROC(SETACL, enc_setacl, dec_setacl), PROC(FS_LOCATIONS, enc_fs_locations, dec_fs_locations), #if defined(CONFIG_NFS_V4_1) PROC(EXCHANGE_ID, enc_exchange_id, dec_exchange_id), PROC(CREATE_SESSION, enc_create_session, dec_create_session), PROC(DESTROY_SESSION, enc_destroy_session, dec_destroy_session), PROC(SEQUENCE, enc_sequence, dec_sequence), PROC(GET_LEASE_TIME, enc_get_lease_time, dec_get_lease_time), #endif /* CONFIG_NFS_V4_1 */ }; struct rpc_version nfs_version4 = { .number = 4, .nrprocs = ARRAY_SIZE(nfs4_procedures), .procs = nfs4_procedures }; /* * Local variables: * c-basic-offset: 8 * End: */