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/svc_xprt.h> 21 #include <linux/sunrpc/msg_prot.h> 22 23 #include <uapi/linux/nfsd/debug.h> 24 25 #include "netns.h" 26 #include "stats.h" 27 #include "export.h" 28 29 #undef ifdebug 30 #ifdef CONFIG_SUNRPC_DEBUG 31 # define ifdebug(flag) if (nfsd_debug & NFSDDBG_##flag) 32 #else 33 # define ifdebug(flag) if (0) 34 #endif 35 36 /* 37 * nfsd version 38 */ 39 #define NFSD_SUPPORTED_MINOR_VERSION 2 40 /* 41 * Maximum blocksizes supported by daemon under various circumstances. 42 */ 43 #define NFSSVC_MAXBLKSIZE RPCSVC_MAXPAYLOAD 44 /* NFSv2 is limited by the protocol specification, see RFC 1094 */ 45 #define NFSSVC_MAXBLKSIZE_V2 (8*1024) 46 47 48 /* 49 * Largest number of bytes we need to allocate for an NFS 50 * call or reply. Used to control buffer sizes. We use 51 * the length of v3 WRITE, READDIR and READDIR replies 52 * which are an RPC header, up to 26 XDR units of reply 53 * data, and some page data. 54 * 55 * Note that accuracy here doesn't matter too much as the 56 * size is rounded up to a page size when allocating space. 57 */ 58 #define NFSD_BUFSIZE ((RPC_MAX_HEADER_WITH_AUTH+26)*XDR_UNIT + NFSSVC_MAXBLKSIZE) 59 60 struct readdir_cd { 61 __be32 err; /* 0, nfserr, or nfserr_eof */ 62 }; 63 64 65 extern struct svc_program nfsd_program; 66 extern const struct svc_version nfsd_version2, nfsd_version3, 67 nfsd_version4; 68 extern struct mutex nfsd_mutex; 69 extern spinlock_t nfsd_drc_lock; 70 extern unsigned long nfsd_drc_max_mem; 71 extern unsigned long nfsd_drc_mem_used; 72 73 extern const struct seq_operations nfs_exports_op; 74 75 /* 76 * Function prototypes. 77 */ 78 int nfsd_svc(int nrservs, struct net *net, const struct cred *cred); 79 int nfsd_dispatch(struct svc_rqst *rqstp, __be32 *statp); 80 81 int nfsd_nrthreads(struct net *); 82 int nfsd_nrpools(struct net *); 83 int nfsd_get_nrthreads(int n, int *, struct net *); 84 int nfsd_set_nrthreads(int n, int *, struct net *); 85 int nfsd_pool_stats_open(struct inode *, struct file *); 86 int nfsd_pool_stats_release(struct inode *, struct file *); 87 88 void nfsd_destroy(struct net *net); 89 90 struct nfsdfs_client { 91 struct kref cl_ref; 92 void (*cl_release)(struct kref *kref); 93 }; 94 95 struct nfsdfs_client *get_nfsdfs_client(struct inode *); 96 struct dentry *nfsd_client_mkdir(struct nfsd_net *nn, 97 struct nfsdfs_client *ncl, u32 id, const struct tree_descr *); 98 void nfsd_client_rmdir(struct dentry *dentry); 99 100 #if defined(CONFIG_NFSD_V2_ACL) || defined(CONFIG_NFSD_V3_ACL) 101 #ifdef CONFIG_NFSD_V2_ACL 102 extern const struct svc_version nfsd_acl_version2; 103 #else 104 #define nfsd_acl_version2 NULL 105 #endif 106 #ifdef CONFIG_NFSD_V3_ACL 107 extern const struct svc_version nfsd_acl_version3; 108 #else 109 #define nfsd_acl_version3 NULL 110 #endif 111 #endif 112 113 struct nfsd_net; 114 115 enum vers_op {NFSD_SET, NFSD_CLEAR, NFSD_TEST, NFSD_AVAIL }; 116 int nfsd_vers(struct nfsd_net *nn, int vers, enum vers_op change); 117 int nfsd_minorversion(struct nfsd_net *nn, u32 minorversion, enum vers_op change); 118 void nfsd_reset_versions(struct nfsd_net *nn); 119 int nfsd_create_serv(struct net *net); 120 121 extern int nfsd_max_blksize; 122 123 static inline int nfsd_v4client(struct svc_rqst *rq) 124 { 125 return rq->rq_prog == NFS_PROGRAM && rq->rq_vers == 4; 126 } 127 static inline struct user_namespace * 128 nfsd_user_namespace(const struct svc_rqst *rqstp) 129 { 130 const struct cred *cred = rqstp->rq_xprt->xpt_cred; 131 return cred ? cred->user_ns : &init_user_ns; 132 } 133 134 /* 135 * NFSv4 State 136 */ 137 #ifdef CONFIG_NFSD_V4 138 extern unsigned long max_delegations; 139 int nfsd4_init_slabs(void); 140 void nfsd4_free_slabs(void); 141 int nfs4_state_start(void); 142 int nfs4_state_start_net(struct net *net); 143 void nfs4_state_shutdown(void); 144 void nfs4_state_shutdown_net(struct net *net); 145 void nfs4_reset_lease(time_t leasetime); 146 int nfs4_reset_recoverydir(char *recdir); 147 char * nfs4_recoverydir(void); 148 bool nfsd4_spo_must_allow(struct svc_rqst *rqstp); 149 #else 150 static inline int nfsd4_init_slabs(void) { return 0; } 151 static inline void nfsd4_free_slabs(void) { } 152 static inline int nfs4_state_start(void) { return 0; } 153 static inline int nfs4_state_start_net(struct net *net) { return 0; } 154 static inline void nfs4_state_shutdown(void) { } 155 static inline void nfs4_state_shutdown_net(struct net *net) { } 156 static inline void nfs4_reset_lease(time_t leasetime) { } 157 static inline int nfs4_reset_recoverydir(char *recdir) { return 0; } 158 static inline char * nfs4_recoverydir(void) {return NULL; } 159 static inline bool nfsd4_spo_must_allow(struct svc_rqst *rqstp) 160 { 161 return false; 162 } 163 #endif 164 165 /* 166 * lockd binding 167 */ 168 void nfsd_lockd_init(void); 169 void nfsd_lockd_shutdown(void); 170 171 172 /* 173 * These macros provide pre-xdr'ed values for faster operation. 174 */ 175 #define nfs_ok cpu_to_be32(NFS_OK) 176 #define nfserr_perm cpu_to_be32(NFSERR_PERM) 177 #define nfserr_noent cpu_to_be32(NFSERR_NOENT) 178 #define nfserr_io cpu_to_be32(NFSERR_IO) 179 #define nfserr_nxio cpu_to_be32(NFSERR_NXIO) 180 #define nfserr_eagain cpu_to_be32(NFSERR_EAGAIN) 181 #define nfserr_acces cpu_to_be32(NFSERR_ACCES) 182 #define nfserr_exist cpu_to_be32(NFSERR_EXIST) 183 #define nfserr_xdev cpu_to_be32(NFSERR_XDEV) 184 #define nfserr_nodev cpu_to_be32(NFSERR_NODEV) 185 #define nfserr_notdir cpu_to_be32(NFSERR_NOTDIR) 186 #define nfserr_isdir cpu_to_be32(NFSERR_ISDIR) 187 #define nfserr_inval cpu_to_be32(NFSERR_INVAL) 188 #define nfserr_fbig cpu_to_be32(NFSERR_FBIG) 189 #define nfserr_nospc cpu_to_be32(NFSERR_NOSPC) 190 #define nfserr_rofs cpu_to_be32(NFSERR_ROFS) 191 #define nfserr_mlink cpu_to_be32(NFSERR_MLINK) 192 #define nfserr_opnotsupp cpu_to_be32(NFSERR_OPNOTSUPP) 193 #define nfserr_nametoolong cpu_to_be32(NFSERR_NAMETOOLONG) 194 #define nfserr_notempty cpu_to_be32(NFSERR_NOTEMPTY) 195 #define nfserr_dquot cpu_to_be32(NFSERR_DQUOT) 196 #define nfserr_stale cpu_to_be32(NFSERR_STALE) 197 #define nfserr_remote cpu_to_be32(NFSERR_REMOTE) 198 #define nfserr_wflush cpu_to_be32(NFSERR_WFLUSH) 199 #define nfserr_badhandle cpu_to_be32(NFSERR_BADHANDLE) 200 #define nfserr_notsync cpu_to_be32(NFSERR_NOT_SYNC) 201 #define nfserr_badcookie cpu_to_be32(NFSERR_BAD_COOKIE) 202 #define nfserr_notsupp cpu_to_be32(NFSERR_NOTSUPP) 203 #define nfserr_toosmall cpu_to_be32(NFSERR_TOOSMALL) 204 #define nfserr_serverfault cpu_to_be32(NFSERR_SERVERFAULT) 205 #define nfserr_badtype cpu_to_be32(NFSERR_BADTYPE) 206 #define nfserr_jukebox cpu_to_be32(NFSERR_JUKEBOX) 207 #define nfserr_denied cpu_to_be32(NFSERR_DENIED) 208 #define nfserr_deadlock cpu_to_be32(NFSERR_DEADLOCK) 209 #define nfserr_expired cpu_to_be32(NFSERR_EXPIRED) 210 #define nfserr_bad_cookie cpu_to_be32(NFSERR_BAD_COOKIE) 211 #define nfserr_same cpu_to_be32(NFSERR_SAME) 212 #define nfserr_clid_inuse cpu_to_be32(NFSERR_CLID_INUSE) 213 #define nfserr_stale_clientid cpu_to_be32(NFSERR_STALE_CLIENTID) 214 #define nfserr_resource cpu_to_be32(NFSERR_RESOURCE) 215 #define nfserr_moved cpu_to_be32(NFSERR_MOVED) 216 #define nfserr_nofilehandle cpu_to_be32(NFSERR_NOFILEHANDLE) 217 #define nfserr_minor_vers_mismatch cpu_to_be32(NFSERR_MINOR_VERS_MISMATCH) 218 #define nfserr_share_denied cpu_to_be32(NFSERR_SHARE_DENIED) 219 #define nfserr_stale_stateid cpu_to_be32(NFSERR_STALE_STATEID) 220 #define nfserr_old_stateid cpu_to_be32(NFSERR_OLD_STATEID) 221 #define nfserr_bad_stateid cpu_to_be32(NFSERR_BAD_STATEID) 222 #define nfserr_bad_seqid cpu_to_be32(NFSERR_BAD_SEQID) 223 #define nfserr_symlink cpu_to_be32(NFSERR_SYMLINK) 224 #define nfserr_not_same cpu_to_be32(NFSERR_NOT_SAME) 225 #define nfserr_lock_range cpu_to_be32(NFSERR_LOCK_RANGE) 226 #define nfserr_restorefh cpu_to_be32(NFSERR_RESTOREFH) 227 #define nfserr_attrnotsupp cpu_to_be32(NFSERR_ATTRNOTSUPP) 228 #define nfserr_bad_xdr cpu_to_be32(NFSERR_BAD_XDR) 229 #define nfserr_openmode cpu_to_be32(NFSERR_OPENMODE) 230 #define nfserr_badowner cpu_to_be32(NFSERR_BADOWNER) 231 #define nfserr_locks_held cpu_to_be32(NFSERR_LOCKS_HELD) 232 #define nfserr_op_illegal cpu_to_be32(NFSERR_OP_ILLEGAL) 233 #define nfserr_grace cpu_to_be32(NFSERR_GRACE) 234 #define nfserr_no_grace cpu_to_be32(NFSERR_NO_GRACE) 235 #define nfserr_reclaim_bad cpu_to_be32(NFSERR_RECLAIM_BAD) 236 #define nfserr_badname cpu_to_be32(NFSERR_BADNAME) 237 #define nfserr_cb_path_down cpu_to_be32(NFSERR_CB_PATH_DOWN) 238 #define nfserr_locked cpu_to_be32(NFSERR_LOCKED) 239 #define nfserr_wrongsec cpu_to_be32(NFSERR_WRONGSEC) 240 #define nfserr_badiomode cpu_to_be32(NFS4ERR_BADIOMODE) 241 #define nfserr_badlayout cpu_to_be32(NFS4ERR_BADLAYOUT) 242 #define nfserr_bad_session_digest cpu_to_be32(NFS4ERR_BAD_SESSION_DIGEST) 243 #define nfserr_badsession cpu_to_be32(NFS4ERR_BADSESSION) 244 #define nfserr_badslot cpu_to_be32(NFS4ERR_BADSLOT) 245 #define nfserr_complete_already cpu_to_be32(NFS4ERR_COMPLETE_ALREADY) 246 #define nfserr_conn_not_bound_to_session cpu_to_be32(NFS4ERR_CONN_NOT_BOUND_TO_SESSION) 247 #define nfserr_deleg_already_wanted cpu_to_be32(NFS4ERR_DELEG_ALREADY_WANTED) 248 #define nfserr_back_chan_busy cpu_to_be32(NFS4ERR_BACK_CHAN_BUSY) 249 #define nfserr_layouttrylater cpu_to_be32(NFS4ERR_LAYOUTTRYLATER) 250 #define nfserr_layoutunavailable cpu_to_be32(NFS4ERR_LAYOUTUNAVAILABLE) 251 #define nfserr_nomatching_layout cpu_to_be32(NFS4ERR_NOMATCHING_LAYOUT) 252 #define nfserr_recallconflict cpu_to_be32(NFS4ERR_RECALLCONFLICT) 253 #define nfserr_unknown_layouttype cpu_to_be32(NFS4ERR_UNKNOWN_LAYOUTTYPE) 254 #define nfserr_seq_misordered cpu_to_be32(NFS4ERR_SEQ_MISORDERED) 255 #define nfserr_sequence_pos cpu_to_be32(NFS4ERR_SEQUENCE_POS) 256 #define nfserr_req_too_big cpu_to_be32(NFS4ERR_REQ_TOO_BIG) 257 #define nfserr_rep_too_big cpu_to_be32(NFS4ERR_REP_TOO_BIG) 258 #define nfserr_rep_too_big_to_cache cpu_to_be32(NFS4ERR_REP_TOO_BIG_TO_CACHE) 259 #define nfserr_retry_uncached_rep cpu_to_be32(NFS4ERR_RETRY_UNCACHED_REP) 260 #define nfserr_unsafe_compound cpu_to_be32(NFS4ERR_UNSAFE_COMPOUND) 261 #define nfserr_too_many_ops cpu_to_be32(NFS4ERR_TOO_MANY_OPS) 262 #define nfserr_op_not_in_session cpu_to_be32(NFS4ERR_OP_NOT_IN_SESSION) 263 #define nfserr_hash_alg_unsupp cpu_to_be32(NFS4ERR_HASH_ALG_UNSUPP) 264 #define nfserr_clientid_busy cpu_to_be32(NFS4ERR_CLIENTID_BUSY) 265 #define nfserr_pnfs_io_hole cpu_to_be32(NFS4ERR_PNFS_IO_HOLE) 266 #define nfserr_seq_false_retry cpu_to_be32(NFS4ERR_SEQ_FALSE_RETRY) 267 #define nfserr_bad_high_slot cpu_to_be32(NFS4ERR_BAD_HIGH_SLOT) 268 #define nfserr_deadsession cpu_to_be32(NFS4ERR_DEADSESSION) 269 #define nfserr_encr_alg_unsupp cpu_to_be32(NFS4ERR_ENCR_ALG_UNSUPP) 270 #define nfserr_pnfs_no_layout cpu_to_be32(NFS4ERR_PNFS_NO_LAYOUT) 271 #define nfserr_not_only_op cpu_to_be32(NFS4ERR_NOT_ONLY_OP) 272 #define nfserr_wrong_cred cpu_to_be32(NFS4ERR_WRONG_CRED) 273 #define nfserr_wrong_type cpu_to_be32(NFS4ERR_WRONG_TYPE) 274 #define nfserr_dirdeleg_unavail cpu_to_be32(NFS4ERR_DIRDELEG_UNAVAIL) 275 #define nfserr_reject_deleg cpu_to_be32(NFS4ERR_REJECT_DELEG) 276 #define nfserr_returnconflict cpu_to_be32(NFS4ERR_RETURNCONFLICT) 277 #define nfserr_deleg_revoked cpu_to_be32(NFS4ERR_DELEG_REVOKED) 278 #define nfserr_partner_notsupp cpu_to_be32(NFS4ERR_PARTNER_NOTSUPP) 279 #define nfserr_partner_no_auth cpu_to_be32(NFS4ERR_PARTNER_NO_AUTH) 280 #define nfserr_union_notsupp cpu_to_be32(NFS4ERR_UNION_NOTSUPP) 281 #define nfserr_offload_denied cpu_to_be32(NFS4ERR_OFFLOAD_DENIED) 282 #define nfserr_wrong_lfs cpu_to_be32(NFS4ERR_WRONG_LFS) 283 #define nfserr_badlabel cpu_to_be32(NFS4ERR_BADLABEL) 284 285 /* error codes for internal use */ 286 /* if a request fails due to kmalloc failure, it gets dropped. 287 * Client should resend eventually 288 */ 289 #define nfserr_dropit cpu_to_be32(30000) 290 /* end-of-file indicator in readdir */ 291 #define nfserr_eof cpu_to_be32(30001) 292 /* replay detected */ 293 #define nfserr_replay_me cpu_to_be32(11001) 294 /* nfs41 replay detected */ 295 #define nfserr_replay_cache cpu_to_be32(11002) 296 297 /* Check for dir entries '.' and '..' */ 298 #define isdotent(n, l) (l < 3 && n[0] == '.' && (l == 1 || n[1] == '.')) 299 300 #ifdef CONFIG_NFSD_V4 301 302 /* before processing a COMPOUND operation, we have to check that there 303 * is enough space in the buffer for XDR encode to succeed. otherwise, 304 * we might process an operation with side effects, and be unable to 305 * tell the client that the operation succeeded. 306 * 307 * COMPOUND_SLACK_SPACE - this is the minimum bytes of buffer space 308 * needed to encode an "ordinary" _successful_ operation. (GETATTR, 309 * READ, READDIR, and READLINK have their own buffer checks.) if we 310 * fall below this level, we fail the next operation with NFS4ERR_RESOURCE. 311 * 312 * COMPOUND_ERR_SLACK_SPACE - this is the minimum bytes of buffer space 313 * needed to encode an operation which has failed with NFS4ERR_RESOURCE. 314 * care is taken to ensure that we never fall below this level for any 315 * reason. 316 */ 317 #define COMPOUND_SLACK_SPACE 140 /* OP_GETFH */ 318 #define COMPOUND_ERR_SLACK_SPACE 16 /* OP_SETATTR */ 319 320 #define NFSD_LAUNDROMAT_MINTIMEOUT 1 /* seconds */ 321 322 /* 323 * The following attributes are currently not supported by the NFSv4 server: 324 * ARCHIVE (deprecated anyway) 325 * HIDDEN (unlikely to be supported any time soon) 326 * MIMETYPE (unlikely to be supported any time soon) 327 * QUOTA_* (will be supported in a forthcoming patch) 328 * SYSTEM (unlikely to be supported any time soon) 329 * TIME_BACKUP (unlikely to be supported any time soon) 330 * TIME_CREATE (unlikely to be supported any time soon) 331 */ 332 #define NFSD4_SUPPORTED_ATTRS_WORD0 \ 333 (FATTR4_WORD0_SUPPORTED_ATTRS | FATTR4_WORD0_TYPE | FATTR4_WORD0_FH_EXPIRE_TYPE \ 334 | FATTR4_WORD0_CHANGE | FATTR4_WORD0_SIZE | FATTR4_WORD0_LINK_SUPPORT \ 335 | FATTR4_WORD0_SYMLINK_SUPPORT | FATTR4_WORD0_NAMED_ATTR | FATTR4_WORD0_FSID \ 336 | FATTR4_WORD0_UNIQUE_HANDLES | FATTR4_WORD0_LEASE_TIME | FATTR4_WORD0_RDATTR_ERROR \ 337 | FATTR4_WORD0_ACLSUPPORT | FATTR4_WORD0_CANSETTIME | FATTR4_WORD0_CASE_INSENSITIVE \ 338 | FATTR4_WORD0_CASE_PRESERVING | FATTR4_WORD0_CHOWN_RESTRICTED \ 339 | FATTR4_WORD0_FILEHANDLE | FATTR4_WORD0_FILEID | FATTR4_WORD0_FILES_AVAIL \ 340 | FATTR4_WORD0_FILES_FREE | FATTR4_WORD0_FILES_TOTAL | FATTR4_WORD0_FS_LOCATIONS | FATTR4_WORD0_HOMOGENEOUS \ 341 | FATTR4_WORD0_MAXFILESIZE | FATTR4_WORD0_MAXLINK | FATTR4_WORD0_MAXNAME \ 342 | FATTR4_WORD0_MAXREAD | FATTR4_WORD0_MAXWRITE | FATTR4_WORD0_ACL) 343 344 #define NFSD4_SUPPORTED_ATTRS_WORD1 \ 345 (FATTR4_WORD1_MODE | FATTR4_WORD1_NO_TRUNC | FATTR4_WORD1_NUMLINKS \ 346 | FATTR4_WORD1_OWNER | FATTR4_WORD1_OWNER_GROUP | FATTR4_WORD1_RAWDEV \ 347 | FATTR4_WORD1_SPACE_AVAIL | FATTR4_WORD1_SPACE_FREE | FATTR4_WORD1_SPACE_TOTAL \ 348 | FATTR4_WORD1_SPACE_USED | FATTR4_WORD1_TIME_ACCESS | FATTR4_WORD1_TIME_ACCESS_SET \ 349 | FATTR4_WORD1_TIME_DELTA | FATTR4_WORD1_TIME_METADATA \ 350 | FATTR4_WORD1_TIME_MODIFY | FATTR4_WORD1_TIME_MODIFY_SET | FATTR4_WORD1_MOUNTED_ON_FILEID) 351 352 #define NFSD4_SUPPORTED_ATTRS_WORD2 0 353 354 /* 4.1 */ 355 #ifdef CONFIG_NFSD_PNFS 356 #define PNFSD_SUPPORTED_ATTRS_WORD1 FATTR4_WORD1_FS_LAYOUT_TYPES 357 #define PNFSD_SUPPORTED_ATTRS_WORD2 \ 358 (FATTR4_WORD2_LAYOUT_BLKSIZE | FATTR4_WORD2_LAYOUT_TYPES) 359 #else 360 #define PNFSD_SUPPORTED_ATTRS_WORD1 0 361 #define PNFSD_SUPPORTED_ATTRS_WORD2 0 362 #endif /* CONFIG_NFSD_PNFS */ 363 364 #define NFSD4_1_SUPPORTED_ATTRS_WORD0 \ 365 NFSD4_SUPPORTED_ATTRS_WORD0 366 367 #define NFSD4_1_SUPPORTED_ATTRS_WORD1 \ 368 (NFSD4_SUPPORTED_ATTRS_WORD1 | PNFSD_SUPPORTED_ATTRS_WORD1) 369 370 #define NFSD4_1_SUPPORTED_ATTRS_WORD2 \ 371 (NFSD4_SUPPORTED_ATTRS_WORD2 | PNFSD_SUPPORTED_ATTRS_WORD2 | \ 372 FATTR4_WORD2_SUPPATTR_EXCLCREAT) 373 374 /* 4.2 */ 375 #ifdef CONFIG_NFSD_V4_SECURITY_LABEL 376 #define NFSD4_2_SECURITY_ATTRS FATTR4_WORD2_SECURITY_LABEL 377 #else 378 #define NFSD4_2_SECURITY_ATTRS 0 379 #endif 380 381 #define NFSD4_2_SUPPORTED_ATTRS_WORD2 \ 382 (NFSD4_1_SUPPORTED_ATTRS_WORD2 | \ 383 FATTR4_WORD2_CHANGE_ATTR_TYPE | \ 384 FATTR4_WORD2_MODE_UMASK | \ 385 NFSD4_2_SECURITY_ATTRS) 386 387 extern const u32 nfsd_suppattrs[3][3]; 388 389 static inline bool bmval_is_subset(const u32 *bm1, const u32 *bm2) 390 { 391 return !((bm1[0] & ~bm2[0]) || 392 (bm1[1] & ~bm2[1]) || 393 (bm1[2] & ~bm2[2])); 394 } 395 396 static inline bool nfsd_attrs_supported(u32 minorversion, const u32 *bmval) 397 { 398 return bmval_is_subset(bmval, nfsd_suppattrs[minorversion]); 399 } 400 401 /* These will return ERR_INVAL if specified in GETATTR or READDIR. */ 402 #define NFSD_WRITEONLY_ATTRS_WORD1 \ 403 (FATTR4_WORD1_TIME_ACCESS_SET | FATTR4_WORD1_TIME_MODIFY_SET) 404 405 /* 406 * These are the only attrs allowed in CREATE/OPEN/SETATTR. Don't add 407 * a writeable attribute here without also adding code to parse it to 408 * nfsd4_decode_fattr(). 409 */ 410 #define NFSD_WRITEABLE_ATTRS_WORD0 \ 411 (FATTR4_WORD0_SIZE | FATTR4_WORD0_ACL) 412 #define NFSD_WRITEABLE_ATTRS_WORD1 \ 413 (FATTR4_WORD1_MODE | FATTR4_WORD1_OWNER | FATTR4_WORD1_OWNER_GROUP \ 414 | FATTR4_WORD1_TIME_ACCESS_SET | FATTR4_WORD1_TIME_MODIFY_SET) 415 #ifdef CONFIG_NFSD_V4_SECURITY_LABEL 416 #define MAYBE_FATTR4_WORD2_SECURITY_LABEL \ 417 FATTR4_WORD2_SECURITY_LABEL 418 #else 419 #define MAYBE_FATTR4_WORD2_SECURITY_LABEL 0 420 #endif 421 #define NFSD_WRITEABLE_ATTRS_WORD2 \ 422 (FATTR4_WORD2_MODE_UMASK \ 423 | MAYBE_FATTR4_WORD2_SECURITY_LABEL) 424 425 #define NFSD_SUPPATTR_EXCLCREAT_WORD0 \ 426 NFSD_WRITEABLE_ATTRS_WORD0 427 /* 428 * we currently store the exclusive create verifier in the v_{a,m}time 429 * attributes so the client can't set these at create time using EXCLUSIVE4_1 430 */ 431 #define NFSD_SUPPATTR_EXCLCREAT_WORD1 \ 432 (NFSD_WRITEABLE_ATTRS_WORD1 & \ 433 ~(FATTR4_WORD1_TIME_ACCESS_SET | FATTR4_WORD1_TIME_MODIFY_SET)) 434 #define NFSD_SUPPATTR_EXCLCREAT_WORD2 \ 435 NFSD_WRITEABLE_ATTRS_WORD2 436 437 extern int nfsd4_is_junction(struct dentry *dentry); 438 extern int register_cld_notifier(void); 439 extern void unregister_cld_notifier(void); 440 #else /* CONFIG_NFSD_V4 */ 441 static inline int nfsd4_is_junction(struct dentry *dentry) 442 { 443 return 0; 444 } 445 446 #define register_cld_notifier() 0 447 #define unregister_cld_notifier() do { } while(0) 448 449 #endif /* CONFIG_NFSD_V4 */ 450 451 #endif /* LINUX_NFSD_NFSD_H */ 452