1 /* 2 * Hodge-podge collection of knfsd-related stuff. 3 * I will sort this out later. 4 * 5 * Copyright (C) 1995-1997 Olaf Kirch <okir@monad.swb.de> 6 */ 7 8 #ifndef LINUX_NFSD_NFSD_H 9 #define LINUX_NFSD_NFSD_H 10 11 #include <linux/types.h> 12 #include <linux/mount.h> 13 14 #include <linux/nfs.h> 15 #include <linux/nfs2.h> 16 #include <linux/nfs3.h> 17 #include <linux/nfs4.h> 18 #include <linux/sunrpc/svc.h> 19 #include <linux/sunrpc/msg_prot.h> 20 21 #include <uapi/linux/nfsd/debug.h> 22 23 #include "stats.h" 24 #include "export.h" 25 26 #undef ifdebug 27 #ifdef NFSD_DEBUG 28 # define ifdebug(flag) if (nfsd_debug & NFSDDBG_##flag) 29 #else 30 # define ifdebug(flag) if (0) 31 #endif 32 33 /* 34 * nfsd version 35 */ 36 #define NFSD_SUPPORTED_MINOR_VERSION 2 37 /* 38 * Maximum blocksizes supported by daemon under various circumstances. 39 */ 40 #define NFSSVC_MAXBLKSIZE RPCSVC_MAXPAYLOAD 41 /* NFSv2 is limited by the protocol specification, see RFC 1094 */ 42 #define NFSSVC_MAXBLKSIZE_V2 (8*1024) 43 44 45 /* 46 * Largest number of bytes we need to allocate for an NFS 47 * call or reply. Used to control buffer sizes. We use 48 * the length of v3 WRITE, READDIR and READDIR replies 49 * which are an RPC header, up to 26 XDR units of reply 50 * data, and some page data. 51 * 52 * Note that accuracy here doesn't matter too much as the 53 * size is rounded up to a page size when allocating space. 54 */ 55 #define NFSD_BUFSIZE ((RPC_MAX_HEADER_WITH_AUTH+26)*XDR_UNIT + NFSSVC_MAXBLKSIZE) 56 57 struct readdir_cd { 58 __be32 err; /* 0, nfserr, or nfserr_eof */ 59 }; 60 61 62 extern struct svc_program nfsd_program; 63 extern struct svc_version nfsd_version2, nfsd_version3, 64 nfsd_version4; 65 extern struct mutex nfsd_mutex; 66 extern spinlock_t nfsd_drc_lock; 67 extern unsigned long nfsd_drc_max_mem; 68 extern unsigned long nfsd_drc_mem_used; 69 70 extern const struct seq_operations nfs_exports_op; 71 72 /* 73 * Function prototypes. 74 */ 75 int nfsd_svc(int nrservs, struct net *net); 76 int nfsd_dispatch(struct svc_rqst *rqstp, __be32 *statp); 77 78 int nfsd_nrthreads(struct net *); 79 int nfsd_nrpools(struct net *); 80 int nfsd_get_nrthreads(int n, int *, struct net *); 81 int nfsd_set_nrthreads(int n, int *, struct net *); 82 int nfsd_pool_stats_open(struct inode *, struct file *); 83 int nfsd_pool_stats_release(struct inode *, struct file *); 84 85 void nfsd_destroy(struct net *net); 86 87 #if defined(CONFIG_NFSD_V2_ACL) || defined(CONFIG_NFSD_V3_ACL) 88 #ifdef CONFIG_NFSD_V2_ACL 89 extern struct svc_version nfsd_acl_version2; 90 #else 91 #define nfsd_acl_version2 NULL 92 #endif 93 #ifdef CONFIG_NFSD_V3_ACL 94 extern struct svc_version nfsd_acl_version3; 95 #else 96 #define nfsd_acl_version3 NULL 97 #endif 98 #endif 99 100 enum vers_op {NFSD_SET, NFSD_CLEAR, NFSD_TEST, NFSD_AVAIL }; 101 int nfsd_vers(int vers, enum vers_op change); 102 int nfsd_minorversion(u32 minorversion, enum vers_op change); 103 void nfsd_reset_versions(void); 104 int nfsd_create_serv(struct net *net); 105 106 extern int nfsd_max_blksize; 107 108 static inline int nfsd_v4client(struct svc_rqst *rq) 109 { 110 return rq->rq_prog == NFS_PROGRAM && rq->rq_vers == 4; 111 } 112 113 /* 114 * NFSv4 State 115 */ 116 #ifdef CONFIG_NFSD_V4 117 extern unsigned long max_delegations; 118 void nfs4_state_init(void); 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 #else 129 static inline void nfs4_state_init(void) { } 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 #endif 140 141 /* 142 * lockd binding 143 */ 144 void nfsd_lockd_init(void); 145 void nfsd_lockd_shutdown(void); 146 147 148 /* 149 * These macros provide pre-xdr'ed values for faster operation. 150 */ 151 #define nfs_ok cpu_to_be32(NFS_OK) 152 #define nfserr_perm cpu_to_be32(NFSERR_PERM) 153 #define nfserr_noent cpu_to_be32(NFSERR_NOENT) 154 #define nfserr_io cpu_to_be32(NFSERR_IO) 155 #define nfserr_nxio cpu_to_be32(NFSERR_NXIO) 156 #define nfserr_eagain cpu_to_be32(NFSERR_EAGAIN) 157 #define nfserr_acces cpu_to_be32(NFSERR_ACCES) 158 #define nfserr_exist cpu_to_be32(NFSERR_EXIST) 159 #define nfserr_xdev cpu_to_be32(NFSERR_XDEV) 160 #define nfserr_nodev cpu_to_be32(NFSERR_NODEV) 161 #define nfserr_notdir cpu_to_be32(NFSERR_NOTDIR) 162 #define nfserr_isdir cpu_to_be32(NFSERR_ISDIR) 163 #define nfserr_inval cpu_to_be32(NFSERR_INVAL) 164 #define nfserr_fbig cpu_to_be32(NFSERR_FBIG) 165 #define nfserr_nospc cpu_to_be32(NFSERR_NOSPC) 166 #define nfserr_rofs cpu_to_be32(NFSERR_ROFS) 167 #define nfserr_mlink cpu_to_be32(NFSERR_MLINK) 168 #define nfserr_opnotsupp cpu_to_be32(NFSERR_OPNOTSUPP) 169 #define nfserr_nametoolong cpu_to_be32(NFSERR_NAMETOOLONG) 170 #define nfserr_notempty cpu_to_be32(NFSERR_NOTEMPTY) 171 #define nfserr_dquot cpu_to_be32(NFSERR_DQUOT) 172 #define nfserr_stale cpu_to_be32(NFSERR_STALE) 173 #define nfserr_remote cpu_to_be32(NFSERR_REMOTE) 174 #define nfserr_wflush cpu_to_be32(NFSERR_WFLUSH) 175 #define nfserr_badhandle cpu_to_be32(NFSERR_BADHANDLE) 176 #define nfserr_notsync cpu_to_be32(NFSERR_NOT_SYNC) 177 #define nfserr_badcookie cpu_to_be32(NFSERR_BAD_COOKIE) 178 #define nfserr_notsupp cpu_to_be32(NFSERR_NOTSUPP) 179 #define nfserr_toosmall cpu_to_be32(NFSERR_TOOSMALL) 180 #define nfserr_serverfault cpu_to_be32(NFSERR_SERVERFAULT) 181 #define nfserr_badtype cpu_to_be32(NFSERR_BADTYPE) 182 #define nfserr_jukebox cpu_to_be32(NFSERR_JUKEBOX) 183 #define nfserr_denied cpu_to_be32(NFSERR_DENIED) 184 #define nfserr_deadlock cpu_to_be32(NFSERR_DEADLOCK) 185 #define nfserr_expired cpu_to_be32(NFSERR_EXPIRED) 186 #define nfserr_bad_cookie cpu_to_be32(NFSERR_BAD_COOKIE) 187 #define nfserr_same cpu_to_be32(NFSERR_SAME) 188 #define nfserr_clid_inuse cpu_to_be32(NFSERR_CLID_INUSE) 189 #define nfserr_stale_clientid cpu_to_be32(NFSERR_STALE_CLIENTID) 190 #define nfserr_resource cpu_to_be32(NFSERR_RESOURCE) 191 #define nfserr_moved cpu_to_be32(NFSERR_MOVED) 192 #define nfserr_nofilehandle cpu_to_be32(NFSERR_NOFILEHANDLE) 193 #define nfserr_minor_vers_mismatch cpu_to_be32(NFSERR_MINOR_VERS_MISMATCH) 194 #define nfserr_share_denied cpu_to_be32(NFSERR_SHARE_DENIED) 195 #define nfserr_stale_stateid cpu_to_be32(NFSERR_STALE_STATEID) 196 #define nfserr_old_stateid cpu_to_be32(NFSERR_OLD_STATEID) 197 #define nfserr_bad_stateid cpu_to_be32(NFSERR_BAD_STATEID) 198 #define nfserr_bad_seqid cpu_to_be32(NFSERR_BAD_SEQID) 199 #define nfserr_symlink cpu_to_be32(NFSERR_SYMLINK) 200 #define nfserr_not_same cpu_to_be32(NFSERR_NOT_SAME) 201 #define nfserr_lock_range cpu_to_be32(NFSERR_LOCK_RANGE) 202 #define nfserr_restorefh cpu_to_be32(NFSERR_RESTOREFH) 203 #define nfserr_attrnotsupp cpu_to_be32(NFSERR_ATTRNOTSUPP) 204 #define nfserr_bad_xdr cpu_to_be32(NFSERR_BAD_XDR) 205 #define nfserr_openmode cpu_to_be32(NFSERR_OPENMODE) 206 #define nfserr_badowner cpu_to_be32(NFSERR_BADOWNER) 207 #define nfserr_locks_held cpu_to_be32(NFSERR_LOCKS_HELD) 208 #define nfserr_op_illegal cpu_to_be32(NFSERR_OP_ILLEGAL) 209 #define nfserr_grace cpu_to_be32(NFSERR_GRACE) 210 #define nfserr_no_grace cpu_to_be32(NFSERR_NO_GRACE) 211 #define nfserr_reclaim_bad cpu_to_be32(NFSERR_RECLAIM_BAD) 212 #define nfserr_badname cpu_to_be32(NFSERR_BADNAME) 213 #define nfserr_cb_path_down cpu_to_be32(NFSERR_CB_PATH_DOWN) 214 #define nfserr_locked cpu_to_be32(NFSERR_LOCKED) 215 #define nfserr_wrongsec cpu_to_be32(NFSERR_WRONGSEC) 216 #define nfserr_badiomode cpu_to_be32(NFS4ERR_BADIOMODE) 217 #define nfserr_badlayout cpu_to_be32(NFS4ERR_BADLAYOUT) 218 #define nfserr_bad_session_digest cpu_to_be32(NFS4ERR_BAD_SESSION_DIGEST) 219 #define nfserr_badsession cpu_to_be32(NFS4ERR_BADSESSION) 220 #define nfserr_badslot cpu_to_be32(NFS4ERR_BADSLOT) 221 #define nfserr_complete_already cpu_to_be32(NFS4ERR_COMPLETE_ALREADY) 222 #define nfserr_conn_not_bound_to_session cpu_to_be32(NFS4ERR_CONN_NOT_BOUND_TO_SESSION) 223 #define nfserr_deleg_already_wanted cpu_to_be32(NFS4ERR_DELEG_ALREADY_WANTED) 224 #define nfserr_back_chan_busy cpu_to_be32(NFS4ERR_BACK_CHAN_BUSY) 225 #define nfserr_layouttrylater cpu_to_be32(NFS4ERR_LAYOUTTRYLATER) 226 #define nfserr_layoutunavailable cpu_to_be32(NFS4ERR_LAYOUTUNAVAILABLE) 227 #define nfserr_nomatching_layout cpu_to_be32(NFS4ERR_NOMATCHING_LAYOUT) 228 #define nfserr_recallconflict cpu_to_be32(NFS4ERR_RECALLCONFLICT) 229 #define nfserr_unknown_layouttype cpu_to_be32(NFS4ERR_UNKNOWN_LAYOUTTYPE) 230 #define nfserr_seq_misordered cpu_to_be32(NFS4ERR_SEQ_MISORDERED) 231 #define nfserr_sequence_pos cpu_to_be32(NFS4ERR_SEQUENCE_POS) 232 #define nfserr_req_too_big cpu_to_be32(NFS4ERR_REQ_TOO_BIG) 233 #define nfserr_rep_too_big cpu_to_be32(NFS4ERR_REP_TOO_BIG) 234 #define nfserr_rep_too_big_to_cache cpu_to_be32(NFS4ERR_REP_TOO_BIG_TO_CACHE) 235 #define nfserr_retry_uncached_rep cpu_to_be32(NFS4ERR_RETRY_UNCACHED_REP) 236 #define nfserr_unsafe_compound cpu_to_be32(NFS4ERR_UNSAFE_COMPOUND) 237 #define nfserr_too_many_ops cpu_to_be32(NFS4ERR_TOO_MANY_OPS) 238 #define nfserr_op_not_in_session cpu_to_be32(NFS4ERR_OP_NOT_IN_SESSION) 239 #define nfserr_hash_alg_unsupp cpu_to_be32(NFS4ERR_HASH_ALG_UNSUPP) 240 #define nfserr_clientid_busy cpu_to_be32(NFS4ERR_CLIENTID_BUSY) 241 #define nfserr_pnfs_io_hole cpu_to_be32(NFS4ERR_PNFS_IO_HOLE) 242 #define nfserr_seq_false_retry cpu_to_be32(NFS4ERR_SEQ_FALSE_RETRY) 243 #define nfserr_bad_high_slot cpu_to_be32(NFS4ERR_BAD_HIGH_SLOT) 244 #define nfserr_deadsession cpu_to_be32(NFS4ERR_DEADSESSION) 245 #define nfserr_encr_alg_unsupp cpu_to_be32(NFS4ERR_ENCR_ALG_UNSUPP) 246 #define nfserr_pnfs_no_layout cpu_to_be32(NFS4ERR_PNFS_NO_LAYOUT) 247 #define nfserr_not_only_op cpu_to_be32(NFS4ERR_NOT_ONLY_OP) 248 #define nfserr_wrong_cred cpu_to_be32(NFS4ERR_WRONG_CRED) 249 #define nfserr_wrong_type cpu_to_be32(NFS4ERR_WRONG_TYPE) 250 #define nfserr_dirdeleg_unavail cpu_to_be32(NFS4ERR_DIRDELEG_UNAVAIL) 251 #define nfserr_reject_deleg cpu_to_be32(NFS4ERR_REJECT_DELEG) 252 #define nfserr_returnconflict cpu_to_be32(NFS4ERR_RETURNCONFLICT) 253 #define nfserr_deleg_revoked cpu_to_be32(NFS4ERR_DELEG_REVOKED) 254 #define nfserr_partner_notsupp cpu_to_be32(NFS4ERR_PARTNER_NOTSUPP) 255 #define nfserr_partner_no_auth cpu_to_be32(NFS4ERR_PARTNER_NO_AUTH) 256 #define nfserr_metadata_notsupp cpu_to_be32(NFS4ERR_METADATA_NOTSUPP) 257 #define nfserr_offload_denied cpu_to_be32(NFS4ERR_OFFLOAD_DENIED) 258 #define nfserr_wrong_lfs cpu_to_be32(NFS4ERR_WRONG_LFS) 259 #define nfserr_badlabel cpu_to_be32(NFS4ERR_BADLABEL) 260 261 /* error codes for internal use */ 262 /* if a request fails due to kmalloc failure, it gets dropped. 263 * Client should resend eventually 264 */ 265 #define nfserr_dropit cpu_to_be32(30000) 266 /* end-of-file indicator in readdir */ 267 #define nfserr_eof cpu_to_be32(30001) 268 /* replay detected */ 269 #define nfserr_replay_me cpu_to_be32(11001) 270 /* nfs41 replay detected */ 271 #define nfserr_replay_cache cpu_to_be32(11002) 272 273 /* Check for dir entries '.' and '..' */ 274 #define isdotent(n, l) (l < 3 && n[0] == '.' && (l == 1 || n[1] == '.')) 275 276 #ifdef CONFIG_NFSD_V4 277 278 /* before processing a COMPOUND operation, we have to check that there 279 * is enough space in the buffer for XDR encode to succeed. otherwise, 280 * we might process an operation with side effects, and be unable to 281 * tell the client that the operation succeeded. 282 * 283 * COMPOUND_SLACK_SPACE - this is the minimum bytes of buffer space 284 * needed to encode an "ordinary" _successful_ operation. (GETATTR, 285 * READ, READDIR, and READLINK have their own buffer checks.) if we 286 * fall below this level, we fail the next operation with NFS4ERR_RESOURCE. 287 * 288 * COMPOUND_ERR_SLACK_SPACE - this is the minimum bytes of buffer space 289 * needed to encode an operation which has failed with NFS4ERR_RESOURCE. 290 * care is taken to ensure that we never fall below this level for any 291 * reason. 292 */ 293 #define COMPOUND_SLACK_SPACE 140 /* OP_GETFH */ 294 #define COMPOUND_ERR_SLACK_SPACE 16 /* OP_SETATTR */ 295 296 #define NFSD_LAUNDROMAT_MINTIMEOUT 1 /* seconds */ 297 298 /* 299 * The following attributes are currently not supported by the NFSv4 server: 300 * ARCHIVE (deprecated anyway) 301 * HIDDEN (unlikely to be supported any time soon) 302 * MIMETYPE (unlikely to be supported any time soon) 303 * QUOTA_* (will be supported in a forthcoming patch) 304 * SYSTEM (unlikely to be supported any time soon) 305 * TIME_BACKUP (unlikely to be supported any time soon) 306 * TIME_CREATE (unlikely to be supported any time soon) 307 */ 308 #define NFSD4_SUPPORTED_ATTRS_WORD0 \ 309 (FATTR4_WORD0_SUPPORTED_ATTRS | FATTR4_WORD0_TYPE | FATTR4_WORD0_FH_EXPIRE_TYPE \ 310 | FATTR4_WORD0_CHANGE | FATTR4_WORD0_SIZE | FATTR4_WORD0_LINK_SUPPORT \ 311 | FATTR4_WORD0_SYMLINK_SUPPORT | FATTR4_WORD0_NAMED_ATTR | FATTR4_WORD0_FSID \ 312 | FATTR4_WORD0_UNIQUE_HANDLES | FATTR4_WORD0_LEASE_TIME | FATTR4_WORD0_RDATTR_ERROR \ 313 | FATTR4_WORD0_ACLSUPPORT | FATTR4_WORD0_CANSETTIME | FATTR4_WORD0_CASE_INSENSITIVE \ 314 | FATTR4_WORD0_CASE_PRESERVING | FATTR4_WORD0_CHOWN_RESTRICTED \ 315 | FATTR4_WORD0_FILEHANDLE | FATTR4_WORD0_FILEID | FATTR4_WORD0_FILES_AVAIL \ 316 | FATTR4_WORD0_FILES_FREE | FATTR4_WORD0_FILES_TOTAL | FATTR4_WORD0_FS_LOCATIONS | FATTR4_WORD0_HOMOGENEOUS \ 317 | FATTR4_WORD0_MAXFILESIZE | FATTR4_WORD0_MAXLINK | FATTR4_WORD0_MAXNAME \ 318 | FATTR4_WORD0_MAXREAD | FATTR4_WORD0_MAXWRITE | FATTR4_WORD0_ACL) 319 320 #define NFSD4_SUPPORTED_ATTRS_WORD1 \ 321 (FATTR4_WORD1_MODE | FATTR4_WORD1_NO_TRUNC | FATTR4_WORD1_NUMLINKS \ 322 | FATTR4_WORD1_OWNER | FATTR4_WORD1_OWNER_GROUP | FATTR4_WORD1_RAWDEV \ 323 | FATTR4_WORD1_SPACE_AVAIL | FATTR4_WORD1_SPACE_FREE | FATTR4_WORD1_SPACE_TOTAL \ 324 | FATTR4_WORD1_SPACE_USED | FATTR4_WORD1_TIME_ACCESS | FATTR4_WORD1_TIME_ACCESS_SET \ 325 | FATTR4_WORD1_TIME_DELTA | FATTR4_WORD1_TIME_METADATA \ 326 | FATTR4_WORD1_TIME_MODIFY | FATTR4_WORD1_TIME_MODIFY_SET | FATTR4_WORD1_MOUNTED_ON_FILEID) 327 328 #define NFSD4_SUPPORTED_ATTRS_WORD2 0 329 330 #define NFSD4_1_SUPPORTED_ATTRS_WORD0 \ 331 NFSD4_SUPPORTED_ATTRS_WORD0 332 333 #define NFSD4_1_SUPPORTED_ATTRS_WORD1 \ 334 NFSD4_SUPPORTED_ATTRS_WORD1 335 336 #define NFSD4_1_SUPPORTED_ATTRS_WORD2 \ 337 (NFSD4_SUPPORTED_ATTRS_WORD2 | FATTR4_WORD2_SUPPATTR_EXCLCREAT) 338 339 #ifdef CONFIG_NFSD_V4_SECURITY_LABEL 340 #define NFSD4_2_SUPPORTED_ATTRS_WORD2 \ 341 (NFSD4_1_SUPPORTED_ATTRS_WORD2 | FATTR4_WORD2_SECURITY_LABEL) 342 #else 343 #define NFSD4_2_SUPPORTED_ATTRS_WORD2 0 344 #endif 345 346 static inline u32 nfsd_suppattrs0(u32 minorversion) 347 { 348 return minorversion ? NFSD4_1_SUPPORTED_ATTRS_WORD0 349 : NFSD4_SUPPORTED_ATTRS_WORD0; 350 } 351 352 static inline u32 nfsd_suppattrs1(u32 minorversion) 353 { 354 return minorversion ? NFSD4_1_SUPPORTED_ATTRS_WORD1 355 : NFSD4_SUPPORTED_ATTRS_WORD1; 356 } 357 358 static inline u32 nfsd_suppattrs2(u32 minorversion) 359 { 360 switch (minorversion) { 361 default: return NFSD4_2_SUPPORTED_ATTRS_WORD2; 362 case 1: return NFSD4_1_SUPPORTED_ATTRS_WORD2; 363 case 0: return NFSD4_SUPPORTED_ATTRS_WORD2; 364 } 365 } 366 367 /* These will return ERR_INVAL if specified in GETATTR or READDIR. */ 368 #define NFSD_WRITEONLY_ATTRS_WORD1 \ 369 (FATTR4_WORD1_TIME_ACCESS_SET | FATTR4_WORD1_TIME_MODIFY_SET) 370 371 /* These are the only attrs allowed in CREATE/OPEN/SETATTR. */ 372 #define NFSD_WRITEABLE_ATTRS_WORD0 \ 373 (FATTR4_WORD0_SIZE | FATTR4_WORD0_ACL) 374 #define NFSD_WRITEABLE_ATTRS_WORD1 \ 375 (FATTR4_WORD1_MODE | FATTR4_WORD1_OWNER | FATTR4_WORD1_OWNER_GROUP \ 376 | FATTR4_WORD1_TIME_ACCESS_SET | FATTR4_WORD1_TIME_MODIFY_SET) 377 #ifdef CONFIG_NFSD_V4_SECURITY_LABEL 378 #define NFSD_WRITEABLE_ATTRS_WORD2 FATTR4_WORD2_SECURITY_LABEL 379 #else 380 #define NFSD_WRITEABLE_ATTRS_WORD2 0 381 #endif 382 383 #define NFSD_SUPPATTR_EXCLCREAT_WORD0 \ 384 NFSD_WRITEABLE_ATTRS_WORD0 385 /* 386 * we currently store the exclusive create verifier in the v_{a,m}time 387 * attributes so the client can't set these at create time using EXCLUSIVE4_1 388 */ 389 #define NFSD_SUPPATTR_EXCLCREAT_WORD1 \ 390 (NFSD_WRITEABLE_ATTRS_WORD1 & \ 391 ~(FATTR4_WORD1_TIME_ACCESS_SET | FATTR4_WORD1_TIME_MODIFY_SET)) 392 #define NFSD_SUPPATTR_EXCLCREAT_WORD2 \ 393 NFSD_WRITEABLE_ATTRS_WORD2 394 395 extern int nfsd4_is_junction(struct dentry *dentry); 396 extern int register_cld_notifier(void); 397 extern void unregister_cld_notifier(void); 398 #else /* CONFIG_NFSD_V4 */ 399 static inline int nfsd4_is_junction(struct dentry *dentry) 400 { 401 return 0; 402 } 403 404 #define register_cld_notifier() 0 405 #define unregister_cld_notifier() do { } while(0) 406 407 #endif /* CONFIG_NFSD_V4 */ 408 409 #endif /* LINUX_NFSD_NFSD_H */ 410