1 /* SPDX-License-Identifier: GPL-2.0 */ 2 /* 3 * Hodge-podge collection of knfsd-related stuff. 4 * I will sort this out later. 5 * 6 * Copyright (C) 1995-1997 Olaf Kirch <okir@monad.swb.de> 7 */ 8 9 #ifndef LINUX_NFSD_NFSD_H 10 #define LINUX_NFSD_NFSD_H 11 12 #include <linux/types.h> 13 #include <linux/mount.h> 14 15 #include <linux/nfs.h> 16 #include <linux/nfs2.h> 17 #include <linux/nfs3.h> 18 #include <linux/nfs4.h> 19 #include <linux/sunrpc/svc.h> 20 #include <linux/sunrpc/msg_prot.h> 21 22 #include <uapi/linux/nfsd/debug.h> 23 24 #include "stats.h" 25 #include "export.h" 26 27 #undef ifdebug 28 #ifdef CONFIG_SUNRPC_DEBUG 29 # define ifdebug(flag) if (nfsd_debug & NFSDDBG_##flag) 30 #else 31 # define ifdebug(flag) if (0) 32 #endif 33 34 /* 35 * nfsd version 36 */ 37 #define NFSD_SUPPORTED_MINOR_VERSION 2 38 /* 39 * Maximum blocksizes supported by daemon under various circumstances. 40 */ 41 #define NFSSVC_MAXBLKSIZE RPCSVC_MAXPAYLOAD 42 /* NFSv2 is limited by the protocol specification, see RFC 1094 */ 43 #define NFSSVC_MAXBLKSIZE_V2 (8*1024) 44 45 46 /* 47 * Largest number of bytes we need to allocate for an NFS 48 * call or reply. Used to control buffer sizes. We use 49 * the length of v3 WRITE, READDIR and READDIR replies 50 * which are an RPC header, up to 26 XDR units of reply 51 * data, and some page data. 52 * 53 * Note that accuracy here doesn't matter too much as the 54 * size is rounded up to a page size when allocating space. 55 */ 56 #define NFSD_BUFSIZE ((RPC_MAX_HEADER_WITH_AUTH+26)*XDR_UNIT + NFSSVC_MAXBLKSIZE) 57 58 struct readdir_cd { 59 __be32 err; /* 0, nfserr, or nfserr_eof */ 60 }; 61 62 63 extern struct svc_program nfsd_program; 64 extern const struct svc_version nfsd_version2, nfsd_version3, 65 nfsd_version4; 66 extern struct mutex nfsd_mutex; 67 extern spinlock_t nfsd_drc_lock; 68 extern unsigned long nfsd_drc_max_mem; 69 extern unsigned long nfsd_drc_mem_used; 70 71 extern const struct seq_operations nfs_exports_op; 72 73 /* 74 * Function prototypes. 75 */ 76 int nfsd_svc(int nrservs, struct net *net); 77 int nfsd_dispatch(struct svc_rqst *rqstp, __be32 *statp); 78 79 int nfsd_nrthreads(struct net *); 80 int nfsd_nrpools(struct net *); 81 int nfsd_get_nrthreads(int n, int *, struct net *); 82 int nfsd_set_nrthreads(int n, int *, struct net *); 83 int nfsd_pool_stats_open(struct inode *, struct file *); 84 int nfsd_pool_stats_release(struct inode *, struct file *); 85 86 void nfsd_destroy(struct net *net); 87 88 #if defined(CONFIG_NFSD_V2_ACL) || defined(CONFIG_NFSD_V3_ACL) 89 #ifdef CONFIG_NFSD_V2_ACL 90 extern const struct svc_version nfsd_acl_version2; 91 #else 92 #define nfsd_acl_version2 NULL 93 #endif 94 #ifdef CONFIG_NFSD_V3_ACL 95 extern const struct svc_version nfsd_acl_version3; 96 #else 97 #define nfsd_acl_version3 NULL 98 #endif 99 #endif 100 101 enum vers_op {NFSD_SET, NFSD_CLEAR, NFSD_TEST, NFSD_AVAIL }; 102 int nfsd_vers(int vers, enum vers_op change); 103 int nfsd_minorversion(u32 minorversion, enum vers_op change); 104 void nfsd_reset_versions(void); 105 int nfsd_create_serv(struct net *net); 106 107 extern int nfsd_max_blksize; 108 109 static inline int nfsd_v4client(struct svc_rqst *rq) 110 { 111 return rq->rq_prog == NFS_PROGRAM && rq->rq_vers == 4; 112 } 113 114 /* 115 * NFSv4 State 116 */ 117 #ifdef CONFIG_NFSD_V4 118 extern unsigned long max_delegations; 119 int nfsd4_init_slabs(void); 120 void nfsd4_free_slabs(void); 121 int nfs4_state_start(void); 122 int nfs4_state_start_net(struct net *net); 123 void nfs4_state_shutdown(void); 124 void nfs4_state_shutdown_net(struct net *net); 125 void nfs4_reset_lease(time_t leasetime); 126 int nfs4_reset_recoverydir(char *recdir); 127 char * nfs4_recoverydir(void); 128 bool nfsd4_spo_must_allow(struct svc_rqst *rqstp); 129 #else 130 static inline int nfsd4_init_slabs(void) { return 0; } 131 static inline void nfsd4_free_slabs(void) { } 132 static inline int nfs4_state_start(void) { return 0; } 133 static inline int nfs4_state_start_net(struct net *net) { return 0; } 134 static inline void nfs4_state_shutdown(void) { } 135 static inline void nfs4_state_shutdown_net(struct net *net) { } 136 static inline void nfs4_reset_lease(time_t leasetime) { } 137 static inline int nfs4_reset_recoverydir(char *recdir) { return 0; } 138 static inline char * nfs4_recoverydir(void) {return NULL; } 139 static inline bool nfsd4_spo_must_allow(struct svc_rqst *rqstp) 140 { 141 return false; 142 } 143 #endif 144 145 /* 146 * lockd binding 147 */ 148 void nfsd_lockd_init(void); 149 void nfsd_lockd_shutdown(void); 150 151 152 /* 153 * These macros provide pre-xdr'ed values for faster operation. 154 */ 155 #define nfs_ok cpu_to_be32(NFS_OK) 156 #define nfserr_perm cpu_to_be32(NFSERR_PERM) 157 #define nfserr_noent cpu_to_be32(NFSERR_NOENT) 158 #define nfserr_io cpu_to_be32(NFSERR_IO) 159 #define nfserr_nxio cpu_to_be32(NFSERR_NXIO) 160 #define nfserr_eagain cpu_to_be32(NFSERR_EAGAIN) 161 #define nfserr_acces cpu_to_be32(NFSERR_ACCES) 162 #define nfserr_exist cpu_to_be32(NFSERR_EXIST) 163 #define nfserr_xdev cpu_to_be32(NFSERR_XDEV) 164 #define nfserr_nodev cpu_to_be32(NFSERR_NODEV) 165 #define nfserr_notdir cpu_to_be32(NFSERR_NOTDIR) 166 #define nfserr_isdir cpu_to_be32(NFSERR_ISDIR) 167 #define nfserr_inval cpu_to_be32(NFSERR_INVAL) 168 #define nfserr_fbig cpu_to_be32(NFSERR_FBIG) 169 #define nfserr_nospc cpu_to_be32(NFSERR_NOSPC) 170 #define nfserr_rofs cpu_to_be32(NFSERR_ROFS) 171 #define nfserr_mlink cpu_to_be32(NFSERR_MLINK) 172 #define nfserr_opnotsupp cpu_to_be32(NFSERR_OPNOTSUPP) 173 #define nfserr_nametoolong cpu_to_be32(NFSERR_NAMETOOLONG) 174 #define nfserr_notempty cpu_to_be32(NFSERR_NOTEMPTY) 175 #define nfserr_dquot cpu_to_be32(NFSERR_DQUOT) 176 #define nfserr_stale cpu_to_be32(NFSERR_STALE) 177 #define nfserr_remote cpu_to_be32(NFSERR_REMOTE) 178 #define nfserr_wflush cpu_to_be32(NFSERR_WFLUSH) 179 #define nfserr_badhandle cpu_to_be32(NFSERR_BADHANDLE) 180 #define nfserr_notsync cpu_to_be32(NFSERR_NOT_SYNC) 181 #define nfserr_badcookie cpu_to_be32(NFSERR_BAD_COOKIE) 182 #define nfserr_notsupp cpu_to_be32(NFSERR_NOTSUPP) 183 #define nfserr_toosmall cpu_to_be32(NFSERR_TOOSMALL) 184 #define nfserr_serverfault cpu_to_be32(NFSERR_SERVERFAULT) 185 #define nfserr_badtype cpu_to_be32(NFSERR_BADTYPE) 186 #define nfserr_jukebox cpu_to_be32(NFSERR_JUKEBOX) 187 #define nfserr_denied cpu_to_be32(NFSERR_DENIED) 188 #define nfserr_deadlock cpu_to_be32(NFSERR_DEADLOCK) 189 #define nfserr_expired cpu_to_be32(NFSERR_EXPIRED) 190 #define nfserr_bad_cookie cpu_to_be32(NFSERR_BAD_COOKIE) 191 #define nfserr_same cpu_to_be32(NFSERR_SAME) 192 #define nfserr_clid_inuse cpu_to_be32(NFSERR_CLID_INUSE) 193 #define nfserr_stale_clientid cpu_to_be32(NFSERR_STALE_CLIENTID) 194 #define nfserr_resource cpu_to_be32(NFSERR_RESOURCE) 195 #define nfserr_moved cpu_to_be32(NFSERR_MOVED) 196 #define nfserr_nofilehandle cpu_to_be32(NFSERR_NOFILEHANDLE) 197 #define nfserr_minor_vers_mismatch cpu_to_be32(NFSERR_MINOR_VERS_MISMATCH) 198 #define nfserr_share_denied cpu_to_be32(NFSERR_SHARE_DENIED) 199 #define nfserr_stale_stateid cpu_to_be32(NFSERR_STALE_STATEID) 200 #define nfserr_old_stateid cpu_to_be32(NFSERR_OLD_STATEID) 201 #define nfserr_bad_stateid cpu_to_be32(NFSERR_BAD_STATEID) 202 #define nfserr_bad_seqid cpu_to_be32(NFSERR_BAD_SEQID) 203 #define nfserr_symlink cpu_to_be32(NFSERR_SYMLINK) 204 #define nfserr_not_same cpu_to_be32(NFSERR_NOT_SAME) 205 #define nfserr_lock_range cpu_to_be32(NFSERR_LOCK_RANGE) 206 #define nfserr_restorefh cpu_to_be32(NFSERR_RESTOREFH) 207 #define nfserr_attrnotsupp cpu_to_be32(NFSERR_ATTRNOTSUPP) 208 #define nfserr_bad_xdr cpu_to_be32(NFSERR_BAD_XDR) 209 #define nfserr_openmode cpu_to_be32(NFSERR_OPENMODE) 210 #define nfserr_badowner cpu_to_be32(NFSERR_BADOWNER) 211 #define nfserr_locks_held cpu_to_be32(NFSERR_LOCKS_HELD) 212 #define nfserr_op_illegal cpu_to_be32(NFSERR_OP_ILLEGAL) 213 #define nfserr_grace cpu_to_be32(NFSERR_GRACE) 214 #define nfserr_no_grace cpu_to_be32(NFSERR_NO_GRACE) 215 #define nfserr_reclaim_bad cpu_to_be32(NFSERR_RECLAIM_BAD) 216 #define nfserr_badname cpu_to_be32(NFSERR_BADNAME) 217 #define nfserr_cb_path_down cpu_to_be32(NFSERR_CB_PATH_DOWN) 218 #define nfserr_locked cpu_to_be32(NFSERR_LOCKED) 219 #define nfserr_wrongsec cpu_to_be32(NFSERR_WRONGSEC) 220 #define nfserr_badiomode cpu_to_be32(NFS4ERR_BADIOMODE) 221 #define nfserr_badlayout cpu_to_be32(NFS4ERR_BADLAYOUT) 222 #define nfserr_bad_session_digest cpu_to_be32(NFS4ERR_BAD_SESSION_DIGEST) 223 #define nfserr_badsession cpu_to_be32(NFS4ERR_BADSESSION) 224 #define nfserr_badslot cpu_to_be32(NFS4ERR_BADSLOT) 225 #define nfserr_complete_already cpu_to_be32(NFS4ERR_COMPLETE_ALREADY) 226 #define nfserr_conn_not_bound_to_session cpu_to_be32(NFS4ERR_CONN_NOT_BOUND_TO_SESSION) 227 #define nfserr_deleg_already_wanted cpu_to_be32(NFS4ERR_DELEG_ALREADY_WANTED) 228 #define nfserr_back_chan_busy cpu_to_be32(NFS4ERR_BACK_CHAN_BUSY) 229 #define nfserr_layouttrylater cpu_to_be32(NFS4ERR_LAYOUTTRYLATER) 230 #define nfserr_layoutunavailable cpu_to_be32(NFS4ERR_LAYOUTUNAVAILABLE) 231 #define nfserr_nomatching_layout cpu_to_be32(NFS4ERR_NOMATCHING_LAYOUT) 232 #define nfserr_recallconflict cpu_to_be32(NFS4ERR_RECALLCONFLICT) 233 #define nfserr_unknown_layouttype cpu_to_be32(NFS4ERR_UNKNOWN_LAYOUTTYPE) 234 #define nfserr_seq_misordered cpu_to_be32(NFS4ERR_SEQ_MISORDERED) 235 #define nfserr_sequence_pos cpu_to_be32(NFS4ERR_SEQUENCE_POS) 236 #define nfserr_req_too_big cpu_to_be32(NFS4ERR_REQ_TOO_BIG) 237 #define nfserr_rep_too_big cpu_to_be32(NFS4ERR_REP_TOO_BIG) 238 #define nfserr_rep_too_big_to_cache cpu_to_be32(NFS4ERR_REP_TOO_BIG_TO_CACHE) 239 #define nfserr_retry_uncached_rep cpu_to_be32(NFS4ERR_RETRY_UNCACHED_REP) 240 #define nfserr_unsafe_compound cpu_to_be32(NFS4ERR_UNSAFE_COMPOUND) 241 #define nfserr_too_many_ops cpu_to_be32(NFS4ERR_TOO_MANY_OPS) 242 #define nfserr_op_not_in_session cpu_to_be32(NFS4ERR_OP_NOT_IN_SESSION) 243 #define nfserr_hash_alg_unsupp cpu_to_be32(NFS4ERR_HASH_ALG_UNSUPP) 244 #define nfserr_clientid_busy cpu_to_be32(NFS4ERR_CLIENTID_BUSY) 245 #define nfserr_pnfs_io_hole cpu_to_be32(NFS4ERR_PNFS_IO_HOLE) 246 #define nfserr_seq_false_retry cpu_to_be32(NFS4ERR_SEQ_FALSE_RETRY) 247 #define nfserr_bad_high_slot cpu_to_be32(NFS4ERR_BAD_HIGH_SLOT) 248 #define nfserr_deadsession cpu_to_be32(NFS4ERR_DEADSESSION) 249 #define nfserr_encr_alg_unsupp cpu_to_be32(NFS4ERR_ENCR_ALG_UNSUPP) 250 #define nfserr_pnfs_no_layout cpu_to_be32(NFS4ERR_PNFS_NO_LAYOUT) 251 #define nfserr_not_only_op cpu_to_be32(NFS4ERR_NOT_ONLY_OP) 252 #define nfserr_wrong_cred cpu_to_be32(NFS4ERR_WRONG_CRED) 253 #define nfserr_wrong_type cpu_to_be32(NFS4ERR_WRONG_TYPE) 254 #define nfserr_dirdeleg_unavail cpu_to_be32(NFS4ERR_DIRDELEG_UNAVAIL) 255 #define nfserr_reject_deleg cpu_to_be32(NFS4ERR_REJECT_DELEG) 256 #define nfserr_returnconflict cpu_to_be32(NFS4ERR_RETURNCONFLICT) 257 #define nfserr_deleg_revoked cpu_to_be32(NFS4ERR_DELEG_REVOKED) 258 #define nfserr_partner_notsupp cpu_to_be32(NFS4ERR_PARTNER_NOTSUPP) 259 #define nfserr_partner_no_auth cpu_to_be32(NFS4ERR_PARTNER_NO_AUTH) 260 #define nfserr_union_notsupp cpu_to_be32(NFS4ERR_UNION_NOTSUPP) 261 #define nfserr_offload_denied cpu_to_be32(NFS4ERR_OFFLOAD_DENIED) 262 #define nfserr_wrong_lfs cpu_to_be32(NFS4ERR_WRONG_LFS) 263 #define nfserr_badlabel cpu_to_be32(NFS4ERR_BADLABEL) 264 265 /* error codes for internal use */ 266 /* if a request fails due to kmalloc failure, it gets dropped. 267 * Client should resend eventually 268 */ 269 #define nfserr_dropit cpu_to_be32(30000) 270 /* end-of-file indicator in readdir */ 271 #define nfserr_eof cpu_to_be32(30001) 272 /* replay detected */ 273 #define nfserr_replay_me cpu_to_be32(11001) 274 /* nfs41 replay detected */ 275 #define nfserr_replay_cache cpu_to_be32(11002) 276 277 /* Check for dir entries '.' and '..' */ 278 #define isdotent(n, l) (l < 3 && n[0] == '.' && (l == 1 || n[1] == '.')) 279 280 #ifdef CONFIG_NFSD_V4 281 282 /* before processing a COMPOUND operation, we have to check that there 283 * is enough space in the buffer for XDR encode to succeed. otherwise, 284 * we might process an operation with side effects, and be unable to 285 * tell the client that the operation succeeded. 286 * 287 * COMPOUND_SLACK_SPACE - this is the minimum bytes of buffer space 288 * needed to encode an "ordinary" _successful_ operation. (GETATTR, 289 * READ, READDIR, and READLINK have their own buffer checks.) if we 290 * fall below this level, we fail the next operation with NFS4ERR_RESOURCE. 291 * 292 * COMPOUND_ERR_SLACK_SPACE - this is the minimum bytes of buffer space 293 * needed to encode an operation which has failed with NFS4ERR_RESOURCE. 294 * care is taken to ensure that we never fall below this level for any 295 * reason. 296 */ 297 #define COMPOUND_SLACK_SPACE 140 /* OP_GETFH */ 298 #define COMPOUND_ERR_SLACK_SPACE 16 /* OP_SETATTR */ 299 300 #define NFSD_LAUNDROMAT_MINTIMEOUT 1 /* seconds */ 301 302 /* 303 * The following attributes are currently not supported by the NFSv4 server: 304 * ARCHIVE (deprecated anyway) 305 * HIDDEN (unlikely to be supported any time soon) 306 * MIMETYPE (unlikely to be supported any time soon) 307 * QUOTA_* (will be supported in a forthcoming patch) 308 * SYSTEM (unlikely to be supported any time soon) 309 * TIME_BACKUP (unlikely to be supported any time soon) 310 * TIME_CREATE (unlikely to be supported any time soon) 311 */ 312 #define NFSD4_SUPPORTED_ATTRS_WORD0 \ 313 (FATTR4_WORD0_SUPPORTED_ATTRS | FATTR4_WORD0_TYPE | FATTR4_WORD0_FH_EXPIRE_TYPE \ 314 | FATTR4_WORD0_CHANGE | FATTR4_WORD0_SIZE | FATTR4_WORD0_LINK_SUPPORT \ 315 | FATTR4_WORD0_SYMLINK_SUPPORT | FATTR4_WORD0_NAMED_ATTR | FATTR4_WORD0_FSID \ 316 | FATTR4_WORD0_UNIQUE_HANDLES | FATTR4_WORD0_LEASE_TIME | FATTR4_WORD0_RDATTR_ERROR \ 317 | FATTR4_WORD0_ACLSUPPORT | FATTR4_WORD0_CANSETTIME | FATTR4_WORD0_CASE_INSENSITIVE \ 318 | FATTR4_WORD0_CASE_PRESERVING | FATTR4_WORD0_CHOWN_RESTRICTED \ 319 | FATTR4_WORD0_FILEHANDLE | FATTR4_WORD0_FILEID | FATTR4_WORD0_FILES_AVAIL \ 320 | FATTR4_WORD0_FILES_FREE | FATTR4_WORD0_FILES_TOTAL | FATTR4_WORD0_FS_LOCATIONS | FATTR4_WORD0_HOMOGENEOUS \ 321 | FATTR4_WORD0_MAXFILESIZE | FATTR4_WORD0_MAXLINK | FATTR4_WORD0_MAXNAME \ 322 | FATTR4_WORD0_MAXREAD | FATTR4_WORD0_MAXWRITE | FATTR4_WORD0_ACL) 323 324 #define NFSD4_SUPPORTED_ATTRS_WORD1 \ 325 (FATTR4_WORD1_MODE | FATTR4_WORD1_NO_TRUNC | FATTR4_WORD1_NUMLINKS \ 326 | FATTR4_WORD1_OWNER | FATTR4_WORD1_OWNER_GROUP | FATTR4_WORD1_RAWDEV \ 327 | FATTR4_WORD1_SPACE_AVAIL | FATTR4_WORD1_SPACE_FREE | FATTR4_WORD1_SPACE_TOTAL \ 328 | FATTR4_WORD1_SPACE_USED | FATTR4_WORD1_TIME_ACCESS | FATTR4_WORD1_TIME_ACCESS_SET \ 329 | FATTR4_WORD1_TIME_DELTA | FATTR4_WORD1_TIME_METADATA \ 330 | FATTR4_WORD1_TIME_MODIFY | FATTR4_WORD1_TIME_MODIFY_SET | FATTR4_WORD1_MOUNTED_ON_FILEID) 331 332 #define NFSD4_SUPPORTED_ATTRS_WORD2 0 333 334 /* 4.1 */ 335 #ifdef CONFIG_NFSD_PNFS 336 #define PNFSD_SUPPORTED_ATTRS_WORD1 FATTR4_WORD1_FS_LAYOUT_TYPES 337 #define PNFSD_SUPPORTED_ATTRS_WORD2 \ 338 (FATTR4_WORD2_LAYOUT_BLKSIZE | FATTR4_WORD2_LAYOUT_TYPES) 339 #else 340 #define PNFSD_SUPPORTED_ATTRS_WORD1 0 341 #define PNFSD_SUPPORTED_ATTRS_WORD2 0 342 #endif /* CONFIG_NFSD_PNFS */ 343 344 #define NFSD4_1_SUPPORTED_ATTRS_WORD0 \ 345 NFSD4_SUPPORTED_ATTRS_WORD0 346 347 #define NFSD4_1_SUPPORTED_ATTRS_WORD1 \ 348 (NFSD4_SUPPORTED_ATTRS_WORD1 | PNFSD_SUPPORTED_ATTRS_WORD1) 349 350 #define NFSD4_1_SUPPORTED_ATTRS_WORD2 \ 351 (NFSD4_SUPPORTED_ATTRS_WORD2 | PNFSD_SUPPORTED_ATTRS_WORD2 | \ 352 FATTR4_WORD2_SUPPATTR_EXCLCREAT) 353 354 /* 4.2 */ 355 #ifdef CONFIG_NFSD_V4_SECURITY_LABEL 356 #define NFSD4_2_SECURITY_ATTRS FATTR4_WORD2_SECURITY_LABEL 357 #else 358 #define NFSD4_2_SECURITY_ATTRS 0 359 #endif 360 361 #define NFSD4_2_SUPPORTED_ATTRS_WORD2 \ 362 (NFSD4_1_SUPPORTED_ATTRS_WORD2 | \ 363 FATTR4_WORD2_MODE_UMASK | \ 364 NFSD4_2_SECURITY_ATTRS) 365 366 extern const u32 nfsd_suppattrs[3][3]; 367 368 static inline bool bmval_is_subset(const u32 *bm1, const u32 *bm2) 369 { 370 return !((bm1[0] & ~bm2[0]) || 371 (bm1[1] & ~bm2[1]) || 372 (bm1[2] & ~bm2[2])); 373 } 374 375 static inline bool nfsd_attrs_supported(u32 minorversion, const u32 *bmval) 376 { 377 return bmval_is_subset(bmval, nfsd_suppattrs[minorversion]); 378 } 379 380 /* These will return ERR_INVAL if specified in GETATTR or READDIR. */ 381 #define NFSD_WRITEONLY_ATTRS_WORD1 \ 382 (FATTR4_WORD1_TIME_ACCESS_SET | FATTR4_WORD1_TIME_MODIFY_SET) 383 384 /* 385 * These are the only attrs allowed in CREATE/OPEN/SETATTR. Don't add 386 * a writeable attribute here without also adding code to parse it to 387 * nfsd4_decode_fattr(). 388 */ 389 #define NFSD_WRITEABLE_ATTRS_WORD0 \ 390 (FATTR4_WORD0_SIZE | FATTR4_WORD0_ACL) 391 #define NFSD_WRITEABLE_ATTRS_WORD1 \ 392 (FATTR4_WORD1_MODE | FATTR4_WORD1_OWNER | FATTR4_WORD1_OWNER_GROUP \ 393 | FATTR4_WORD1_TIME_ACCESS_SET | FATTR4_WORD1_TIME_MODIFY_SET) 394 #ifdef CONFIG_NFSD_V4_SECURITY_LABEL 395 #define MAYBE_FATTR4_WORD2_SECURITY_LABEL \ 396 FATTR4_WORD2_SECURITY_LABEL 397 #else 398 #define MAYBE_FATTR4_WORD2_SECURITY_LABEL 0 399 #endif 400 #define NFSD_WRITEABLE_ATTRS_WORD2 \ 401 (FATTR4_WORD2_MODE_UMASK \ 402 | MAYBE_FATTR4_WORD2_SECURITY_LABEL) 403 404 #define NFSD_SUPPATTR_EXCLCREAT_WORD0 \ 405 NFSD_WRITEABLE_ATTRS_WORD0 406 /* 407 * we currently store the exclusive create verifier in the v_{a,m}time 408 * attributes so the client can't set these at create time using EXCLUSIVE4_1 409 */ 410 #define NFSD_SUPPATTR_EXCLCREAT_WORD1 \ 411 (NFSD_WRITEABLE_ATTRS_WORD1 & \ 412 ~(FATTR4_WORD1_TIME_ACCESS_SET | FATTR4_WORD1_TIME_MODIFY_SET)) 413 #define NFSD_SUPPATTR_EXCLCREAT_WORD2 \ 414 NFSD_WRITEABLE_ATTRS_WORD2 415 416 extern int nfsd4_is_junction(struct dentry *dentry); 417 extern int register_cld_notifier(void); 418 extern void unregister_cld_notifier(void); 419 #else /* CONFIG_NFSD_V4 */ 420 static inline int nfsd4_is_junction(struct dentry *dentry) 421 { 422 return 0; 423 } 424 425 #define register_cld_notifier() 0 426 #define unregister_cld_notifier() do { } while(0) 427 428 #endif /* CONFIG_NFSD_V4 */ 429 430 #endif /* LINUX_NFSD_NFSD_H */ 431