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 CONFIG_SUNRPC_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 57struct readdir_cd { 58 __be32 err; /* 0, nfserr, or nfserr_eof */ 59}; 60 61 62extern struct svc_program nfsd_program; 63extern struct svc_version nfsd_version2, nfsd_version3, 64 nfsd_version4; 65extern struct mutex nfsd_mutex; 66extern spinlock_t nfsd_drc_lock; 67extern unsigned long nfsd_drc_max_mem; 68extern unsigned long nfsd_drc_mem_used; 69 70extern const struct seq_operations nfs_exports_op; 71 72/* 73 * Function prototypes. 74 */ 75int nfsd_svc(int nrservs, struct net *net); 76int nfsd_dispatch(struct svc_rqst *rqstp, __be32 *statp); 77 78int nfsd_nrthreads(struct net *); 79int nfsd_nrpools(struct net *); 80int nfsd_get_nrthreads(int n, int *, struct net *); 81int nfsd_set_nrthreads(int n, int *, struct net *); 82int nfsd_pool_stats_open(struct inode *, struct file *); 83int nfsd_pool_stats_release(struct inode *, struct file *); 84 85void nfsd_destroy(struct net *net); 86 87#if defined(CONFIG_NFSD_V2_ACL) || defined(CONFIG_NFSD_V3_ACL) 88#ifdef CONFIG_NFSD_V2_ACL 89extern struct svc_version nfsd_acl_version2; 90#else 91#define nfsd_acl_version2 NULL 92#endif 93#ifdef CONFIG_NFSD_V3_ACL 94extern struct svc_version nfsd_acl_version3; 95#else 96#define nfsd_acl_version3 NULL 97#endif 98#endif 99 100enum vers_op {NFSD_SET, NFSD_CLEAR, NFSD_TEST, NFSD_AVAIL }; 101int nfsd_vers(int vers, enum vers_op change); 102int nfsd_minorversion(u32 minorversion, enum vers_op change); 103void nfsd_reset_versions(void); 104int nfsd_create_serv(struct net *net); 105 106extern int nfsd_max_blksize; 107 108static 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 117extern unsigned long max_delegations; 118int nfsd4_init_slabs(void); 119void nfsd4_free_slabs(void); 120int nfs4_state_start(void); 121int nfs4_state_start_net(struct net *net); 122void nfs4_state_shutdown(void); 123void nfs4_state_shutdown_net(struct net *net); 124void nfs4_reset_lease(time_t leasetime); 125int nfs4_reset_recoverydir(char *recdir); 126char * nfs4_recoverydir(void); 127#else 128static inline int nfsd4_init_slabs(void) { return 0; } 129static inline void nfsd4_free_slabs(void) { } 130static inline int nfs4_state_start(void) { return 0; } 131static inline int nfs4_state_start_net(struct net *net) { return 0; } 132static inline void nfs4_state_shutdown(void) { } 133static inline void nfs4_state_shutdown_net(struct net *net) { } 134static inline void nfs4_reset_lease(time_t leasetime) { } 135static inline int nfs4_reset_recoverydir(char *recdir) { return 0; } 136static inline char * nfs4_recoverydir(void) {return NULL; } 137#endif 138 139/* 140 * lockd binding 141 */ 142void nfsd_lockd_init(void); 143void nfsd_lockd_shutdown(void); 144 145 146/* 147 * These macros provide pre-xdr'ed values for faster operation. 148 */ 149#define nfs_ok cpu_to_be32(NFS_OK) 150#define nfserr_perm cpu_to_be32(NFSERR_PERM) 151#define nfserr_noent cpu_to_be32(NFSERR_NOENT) 152#define nfserr_io cpu_to_be32(NFSERR_IO) 153#define nfserr_nxio cpu_to_be32(NFSERR_NXIO) 154#define nfserr_eagain cpu_to_be32(NFSERR_EAGAIN) 155#define nfserr_acces cpu_to_be32(NFSERR_ACCES) 156#define nfserr_exist cpu_to_be32(NFSERR_EXIST) 157#define nfserr_xdev cpu_to_be32(NFSERR_XDEV) 158#define nfserr_nodev cpu_to_be32(NFSERR_NODEV) 159#define nfserr_notdir cpu_to_be32(NFSERR_NOTDIR) 160#define nfserr_isdir cpu_to_be32(NFSERR_ISDIR) 161#define nfserr_inval cpu_to_be32(NFSERR_INVAL) 162#define nfserr_fbig cpu_to_be32(NFSERR_FBIG) 163#define nfserr_nospc cpu_to_be32(NFSERR_NOSPC) 164#define nfserr_rofs cpu_to_be32(NFSERR_ROFS) 165#define nfserr_mlink cpu_to_be32(NFSERR_MLINK) 166#define nfserr_opnotsupp cpu_to_be32(NFSERR_OPNOTSUPP) 167#define nfserr_nametoolong cpu_to_be32(NFSERR_NAMETOOLONG) 168#define nfserr_notempty cpu_to_be32(NFSERR_NOTEMPTY) 169#define nfserr_dquot cpu_to_be32(NFSERR_DQUOT) 170#define nfserr_stale cpu_to_be32(NFSERR_STALE) 171#define nfserr_remote cpu_to_be32(NFSERR_REMOTE) 172#define nfserr_wflush cpu_to_be32(NFSERR_WFLUSH) 173#define nfserr_badhandle cpu_to_be32(NFSERR_BADHANDLE) 174#define nfserr_notsync cpu_to_be32(NFSERR_NOT_SYNC) 175#define nfserr_badcookie cpu_to_be32(NFSERR_BAD_COOKIE) 176#define nfserr_notsupp cpu_to_be32(NFSERR_NOTSUPP) 177#define nfserr_toosmall cpu_to_be32(NFSERR_TOOSMALL) 178#define nfserr_serverfault cpu_to_be32(NFSERR_SERVERFAULT) 179#define nfserr_badtype cpu_to_be32(NFSERR_BADTYPE) 180#define nfserr_jukebox cpu_to_be32(NFSERR_JUKEBOX) 181#define nfserr_denied cpu_to_be32(NFSERR_DENIED) 182#define nfserr_deadlock cpu_to_be32(NFSERR_DEADLOCK) 183#define nfserr_expired cpu_to_be32(NFSERR_EXPIRED) 184#define nfserr_bad_cookie cpu_to_be32(NFSERR_BAD_COOKIE) 185#define nfserr_same cpu_to_be32(NFSERR_SAME) 186#define nfserr_clid_inuse cpu_to_be32(NFSERR_CLID_INUSE) 187#define nfserr_stale_clientid cpu_to_be32(NFSERR_STALE_CLIENTID) 188#define nfserr_resource cpu_to_be32(NFSERR_RESOURCE) 189#define nfserr_moved cpu_to_be32(NFSERR_MOVED) 190#define nfserr_nofilehandle cpu_to_be32(NFSERR_NOFILEHANDLE) 191#define nfserr_minor_vers_mismatch cpu_to_be32(NFSERR_MINOR_VERS_MISMATCH) 192#define nfserr_share_denied cpu_to_be32(NFSERR_SHARE_DENIED) 193#define nfserr_stale_stateid cpu_to_be32(NFSERR_STALE_STATEID) 194#define nfserr_old_stateid cpu_to_be32(NFSERR_OLD_STATEID) 195#define nfserr_bad_stateid cpu_to_be32(NFSERR_BAD_STATEID) 196#define nfserr_bad_seqid cpu_to_be32(NFSERR_BAD_SEQID) 197#define nfserr_symlink cpu_to_be32(NFSERR_SYMLINK) 198#define nfserr_not_same cpu_to_be32(NFSERR_NOT_SAME) 199#define nfserr_lock_range cpu_to_be32(NFSERR_LOCK_RANGE) 200#define nfserr_restorefh cpu_to_be32(NFSERR_RESTOREFH) 201#define nfserr_attrnotsupp cpu_to_be32(NFSERR_ATTRNOTSUPP) 202#define nfserr_bad_xdr cpu_to_be32(NFSERR_BAD_XDR) 203#define nfserr_openmode cpu_to_be32(NFSERR_OPENMODE) 204#define nfserr_badowner cpu_to_be32(NFSERR_BADOWNER) 205#define nfserr_locks_held cpu_to_be32(NFSERR_LOCKS_HELD) 206#define nfserr_op_illegal cpu_to_be32(NFSERR_OP_ILLEGAL) 207#define nfserr_grace cpu_to_be32(NFSERR_GRACE) 208#define nfserr_no_grace cpu_to_be32(NFSERR_NO_GRACE) 209#define nfserr_reclaim_bad cpu_to_be32(NFSERR_RECLAIM_BAD) 210#define nfserr_badname cpu_to_be32(NFSERR_BADNAME) 211#define nfserr_cb_path_down cpu_to_be32(NFSERR_CB_PATH_DOWN) 212#define nfserr_locked cpu_to_be32(NFSERR_LOCKED) 213#define nfserr_wrongsec cpu_to_be32(NFSERR_WRONGSEC) 214#define nfserr_badiomode cpu_to_be32(NFS4ERR_BADIOMODE) 215#define nfserr_badlayout cpu_to_be32(NFS4ERR_BADLAYOUT) 216#define nfserr_bad_session_digest cpu_to_be32(NFS4ERR_BAD_SESSION_DIGEST) 217#define nfserr_badsession cpu_to_be32(NFS4ERR_BADSESSION) 218#define nfserr_badslot cpu_to_be32(NFS4ERR_BADSLOT) 219#define nfserr_complete_already cpu_to_be32(NFS4ERR_COMPLETE_ALREADY) 220#define nfserr_conn_not_bound_to_session cpu_to_be32(NFS4ERR_CONN_NOT_BOUND_TO_SESSION) 221#define nfserr_deleg_already_wanted cpu_to_be32(NFS4ERR_DELEG_ALREADY_WANTED) 222#define nfserr_back_chan_busy cpu_to_be32(NFS4ERR_BACK_CHAN_BUSY) 223#define nfserr_layouttrylater cpu_to_be32(NFS4ERR_LAYOUTTRYLATER) 224#define nfserr_layoutunavailable cpu_to_be32(NFS4ERR_LAYOUTUNAVAILABLE) 225#define nfserr_nomatching_layout cpu_to_be32(NFS4ERR_NOMATCHING_LAYOUT) 226#define nfserr_recallconflict cpu_to_be32(NFS4ERR_RECALLCONFLICT) 227#define nfserr_unknown_layouttype cpu_to_be32(NFS4ERR_UNKNOWN_LAYOUTTYPE) 228#define nfserr_seq_misordered cpu_to_be32(NFS4ERR_SEQ_MISORDERED) 229#define nfserr_sequence_pos cpu_to_be32(NFS4ERR_SEQUENCE_POS) 230#define nfserr_req_too_big cpu_to_be32(NFS4ERR_REQ_TOO_BIG) 231#define nfserr_rep_too_big cpu_to_be32(NFS4ERR_REP_TOO_BIG) 232#define nfserr_rep_too_big_to_cache cpu_to_be32(NFS4ERR_REP_TOO_BIG_TO_CACHE) 233#define nfserr_retry_uncached_rep cpu_to_be32(NFS4ERR_RETRY_UNCACHED_REP) 234#define nfserr_unsafe_compound cpu_to_be32(NFS4ERR_UNSAFE_COMPOUND) 235#define nfserr_too_many_ops cpu_to_be32(NFS4ERR_TOO_MANY_OPS) 236#define nfserr_op_not_in_session cpu_to_be32(NFS4ERR_OP_NOT_IN_SESSION) 237#define nfserr_hash_alg_unsupp cpu_to_be32(NFS4ERR_HASH_ALG_UNSUPP) 238#define nfserr_clientid_busy cpu_to_be32(NFS4ERR_CLIENTID_BUSY) 239#define nfserr_pnfs_io_hole cpu_to_be32(NFS4ERR_PNFS_IO_HOLE) 240#define nfserr_seq_false_retry cpu_to_be32(NFS4ERR_SEQ_FALSE_RETRY) 241#define nfserr_bad_high_slot cpu_to_be32(NFS4ERR_BAD_HIGH_SLOT) 242#define nfserr_deadsession cpu_to_be32(NFS4ERR_DEADSESSION) 243#define nfserr_encr_alg_unsupp cpu_to_be32(NFS4ERR_ENCR_ALG_UNSUPP) 244#define nfserr_pnfs_no_layout cpu_to_be32(NFS4ERR_PNFS_NO_LAYOUT) 245#define nfserr_not_only_op cpu_to_be32(NFS4ERR_NOT_ONLY_OP) 246#define nfserr_wrong_cred cpu_to_be32(NFS4ERR_WRONG_CRED) 247#define nfserr_wrong_type cpu_to_be32(NFS4ERR_WRONG_TYPE) 248#define nfserr_dirdeleg_unavail cpu_to_be32(NFS4ERR_DIRDELEG_UNAVAIL) 249#define nfserr_reject_deleg cpu_to_be32(NFS4ERR_REJECT_DELEG) 250#define nfserr_returnconflict cpu_to_be32(NFS4ERR_RETURNCONFLICT) 251#define nfserr_deleg_revoked cpu_to_be32(NFS4ERR_DELEG_REVOKED) 252#define nfserr_partner_notsupp cpu_to_be32(NFS4ERR_PARTNER_NOTSUPP) 253#define nfserr_partner_no_auth cpu_to_be32(NFS4ERR_PARTNER_NO_AUTH) 254#define nfserr_union_notsupp cpu_to_be32(NFS4ERR_UNION_NOTSUPP) 255#define nfserr_offload_denied cpu_to_be32(NFS4ERR_OFFLOAD_DENIED) 256#define nfserr_wrong_lfs cpu_to_be32(NFS4ERR_WRONG_LFS) 257#define nfserr_badlabel cpu_to_be32(NFS4ERR_BADLABEL) 258 259/* error codes for internal use */ 260/* if a request fails due to kmalloc failure, it gets dropped. 261 * Client should resend eventually 262 */ 263#define nfserr_dropit cpu_to_be32(30000) 264/* end-of-file indicator in readdir */ 265#define nfserr_eof cpu_to_be32(30001) 266/* replay detected */ 267#define nfserr_replay_me cpu_to_be32(11001) 268/* nfs41 replay detected */ 269#define nfserr_replay_cache cpu_to_be32(11002) 270 271/* Check for dir entries '.' and '..' */ 272#define isdotent(n, l) (l < 3 && n[0] == '.' && (l == 1 || n[1] == '.')) 273 274#ifdef CONFIG_NFSD_V4 275 276/* before processing a COMPOUND operation, we have to check that there 277 * is enough space in the buffer for XDR encode to succeed. otherwise, 278 * we might process an operation with side effects, and be unable to 279 * tell the client that the operation succeeded. 280 * 281 * COMPOUND_SLACK_SPACE - this is the minimum bytes of buffer space 282 * needed to encode an "ordinary" _successful_ operation. (GETATTR, 283 * READ, READDIR, and READLINK have their own buffer checks.) if we 284 * fall below this level, we fail the next operation with NFS4ERR_RESOURCE. 285 * 286 * COMPOUND_ERR_SLACK_SPACE - this is the minimum bytes of buffer space 287 * needed to encode an operation which has failed with NFS4ERR_RESOURCE. 288 * care is taken to ensure that we never fall below this level for any 289 * reason. 290 */ 291#define COMPOUND_SLACK_SPACE 140 /* OP_GETFH */ 292#define COMPOUND_ERR_SLACK_SPACE 16 /* OP_SETATTR */ 293 294#define NFSD_LAUNDROMAT_MINTIMEOUT 1 /* seconds */ 295 296/* 297 * The following attributes are currently not supported by the NFSv4 server: 298 * ARCHIVE (deprecated anyway) 299 * HIDDEN (unlikely to be supported any time soon) 300 * MIMETYPE (unlikely to be supported any time soon) 301 * QUOTA_* (will be supported in a forthcoming patch) 302 * SYSTEM (unlikely to be supported any time soon) 303 * TIME_BACKUP (unlikely to be supported any time soon) 304 * TIME_CREATE (unlikely to be supported any time soon) 305 */ 306#define NFSD4_SUPPORTED_ATTRS_WORD0 \ 307(FATTR4_WORD0_SUPPORTED_ATTRS | FATTR4_WORD0_TYPE | FATTR4_WORD0_FH_EXPIRE_TYPE \ 308 | FATTR4_WORD0_CHANGE | FATTR4_WORD0_SIZE | FATTR4_WORD0_LINK_SUPPORT \ 309 | FATTR4_WORD0_SYMLINK_SUPPORT | FATTR4_WORD0_NAMED_ATTR | FATTR4_WORD0_FSID \ 310 | FATTR4_WORD0_UNIQUE_HANDLES | FATTR4_WORD0_LEASE_TIME | FATTR4_WORD0_RDATTR_ERROR \ 311 | FATTR4_WORD0_ACLSUPPORT | FATTR4_WORD0_CANSETTIME | FATTR4_WORD0_CASE_INSENSITIVE \ 312 | FATTR4_WORD0_CASE_PRESERVING | FATTR4_WORD0_CHOWN_RESTRICTED \ 313 | FATTR4_WORD0_FILEHANDLE | FATTR4_WORD0_FILEID | FATTR4_WORD0_FILES_AVAIL \ 314 | FATTR4_WORD0_FILES_FREE | FATTR4_WORD0_FILES_TOTAL | FATTR4_WORD0_FS_LOCATIONS | FATTR4_WORD0_HOMOGENEOUS \ 315 | FATTR4_WORD0_MAXFILESIZE | FATTR4_WORD0_MAXLINK | FATTR4_WORD0_MAXNAME \ 316 | FATTR4_WORD0_MAXREAD | FATTR4_WORD0_MAXWRITE | FATTR4_WORD0_ACL) 317 318#define NFSD4_SUPPORTED_ATTRS_WORD1 \ 319(FATTR4_WORD1_MODE | FATTR4_WORD1_NO_TRUNC | FATTR4_WORD1_NUMLINKS \ 320 | FATTR4_WORD1_OWNER | FATTR4_WORD1_OWNER_GROUP | FATTR4_WORD1_RAWDEV \ 321 | FATTR4_WORD1_SPACE_AVAIL | FATTR4_WORD1_SPACE_FREE | FATTR4_WORD1_SPACE_TOTAL \ 322 | FATTR4_WORD1_SPACE_USED | FATTR4_WORD1_TIME_ACCESS | FATTR4_WORD1_TIME_ACCESS_SET \ 323 | FATTR4_WORD1_TIME_DELTA | FATTR4_WORD1_TIME_METADATA \ 324 | FATTR4_WORD1_TIME_MODIFY | FATTR4_WORD1_TIME_MODIFY_SET | FATTR4_WORD1_MOUNTED_ON_FILEID) 325 326#define NFSD4_SUPPORTED_ATTRS_WORD2 0 327 328/* 4.1 */ 329#ifdef CONFIG_NFSD_PNFS 330#define PNFSD_SUPPORTED_ATTRS_WORD1 FATTR4_WORD1_FS_LAYOUT_TYPES 331#define PNFSD_SUPPORTED_ATTRS_WORD2 \ 332(FATTR4_WORD2_LAYOUT_BLKSIZE | FATTR4_WORD2_LAYOUT_TYPES) 333#else 334#define PNFSD_SUPPORTED_ATTRS_WORD1 0 335#define PNFSD_SUPPORTED_ATTRS_WORD2 0 336#endif /* CONFIG_NFSD_PNFS */ 337 338#define NFSD4_1_SUPPORTED_ATTRS_WORD0 \ 339 NFSD4_SUPPORTED_ATTRS_WORD0 340 341#define NFSD4_1_SUPPORTED_ATTRS_WORD1 \ 342 (NFSD4_SUPPORTED_ATTRS_WORD1 | PNFSD_SUPPORTED_ATTRS_WORD1) 343 344#define NFSD4_1_SUPPORTED_ATTRS_WORD2 \ 345 (NFSD4_SUPPORTED_ATTRS_WORD2 | PNFSD_SUPPORTED_ATTRS_WORD2 | \ 346 FATTR4_WORD2_SUPPATTR_EXCLCREAT) 347 348/* 4.2 */ 349#ifdef CONFIG_NFSD_V4_SECURITY_LABEL 350#define NFSD4_2_SECURITY_ATTRS FATTR4_WORD2_SECURITY_LABEL 351#else 352#define NFSD4_2_SECURITY_ATTRS 0 353#endif 354 355#define NFSD4_2_SUPPORTED_ATTRS_WORD2 \ 356 (NFSD4_1_SUPPORTED_ATTRS_WORD2 | \ 357 NFSD4_2_SECURITY_ATTRS) 358 359static inline u32 nfsd_suppattrs0(u32 minorversion) 360{ 361 return minorversion ? NFSD4_1_SUPPORTED_ATTRS_WORD0 362 : NFSD4_SUPPORTED_ATTRS_WORD0; 363} 364 365static inline u32 nfsd_suppattrs1(u32 minorversion) 366{ 367 return minorversion ? NFSD4_1_SUPPORTED_ATTRS_WORD1 368 : NFSD4_SUPPORTED_ATTRS_WORD1; 369} 370 371static inline u32 nfsd_suppattrs2(u32 minorversion) 372{ 373 switch (minorversion) { 374 default: return NFSD4_2_SUPPORTED_ATTRS_WORD2; 375 case 1: return NFSD4_1_SUPPORTED_ATTRS_WORD2; 376 case 0: return NFSD4_SUPPORTED_ATTRS_WORD2; 377 } 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/* These are the only attrs allowed in CREATE/OPEN/SETATTR. */ 385#define NFSD_WRITEABLE_ATTRS_WORD0 \ 386 (FATTR4_WORD0_SIZE | FATTR4_WORD0_ACL) 387#define NFSD_WRITEABLE_ATTRS_WORD1 \ 388 (FATTR4_WORD1_MODE | FATTR4_WORD1_OWNER | FATTR4_WORD1_OWNER_GROUP \ 389 | FATTR4_WORD1_TIME_ACCESS_SET | FATTR4_WORD1_TIME_MODIFY_SET) 390#ifdef CONFIG_NFSD_V4_SECURITY_LABEL 391#define NFSD_WRITEABLE_ATTRS_WORD2 FATTR4_WORD2_SECURITY_LABEL 392#else 393#define NFSD_WRITEABLE_ATTRS_WORD2 0 394#endif 395 396#define NFSD_SUPPATTR_EXCLCREAT_WORD0 \ 397 NFSD_WRITEABLE_ATTRS_WORD0 398/* 399 * we currently store the exclusive create verifier in the v_{a,m}time 400 * attributes so the client can't set these at create time using EXCLUSIVE4_1 401 */ 402#define NFSD_SUPPATTR_EXCLCREAT_WORD1 \ 403 (NFSD_WRITEABLE_ATTRS_WORD1 & \ 404 ~(FATTR4_WORD1_TIME_ACCESS_SET | FATTR4_WORD1_TIME_MODIFY_SET)) 405#define NFSD_SUPPATTR_EXCLCREAT_WORD2 \ 406 NFSD_WRITEABLE_ATTRS_WORD2 407 408extern int nfsd4_is_junction(struct dentry *dentry); 409extern int register_cld_notifier(void); 410extern void unregister_cld_notifier(void); 411#else /* CONFIG_NFSD_V4 */ 412static inline int nfsd4_is_junction(struct dentry *dentry) 413{ 414 return 0; 415} 416 417#define register_cld_notifier() 0 418#define unregister_cld_notifier() do { } while(0) 419 420#endif /* CONFIG_NFSD_V4 */ 421 422#endif /* LINUX_NFSD_NFSD_H */ 423