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 #include <linux/sunrpc/addr.h> 23 24 #include <uapi/linux/nfsd/debug.h> 25 26 #include "netns.h" 27 #include "stats.h" 28 #include "export.h" 29 30 #undef ifdebug 31 #ifdef CONFIG_SUNRPC_DEBUG 32 # define ifdebug(flag) if (nfsd_debug & NFSDDBG_##flag) 33 #else 34 # define ifdebug(flag) if (0) 35 #endif 36 37 /* 38 * nfsd version 39 */ 40 #define NFSD_SUPPORTED_MINOR_VERSION 2 41 /* 42 * Maximum blocksizes supported by daemon under various circumstances. 43 */ 44 #define NFSSVC_MAXBLKSIZE RPCSVC_MAXPAYLOAD 45 /* NFSv2 is limited by the protocol specification, see RFC 1094 */ 46 #define NFSSVC_MAXBLKSIZE_V2 (8*1024) 47 48 49 /* 50 * Largest number of bytes we need to allocate for an NFS 51 * call or reply. Used to control buffer sizes. We use 52 * the length of v3 WRITE, READDIR and READDIR replies 53 * which are an RPC header, up to 26 XDR units of reply 54 * data, and some page data. 55 * 56 * Note that accuracy here doesn't matter too much as the 57 * size is rounded up to a page size when allocating space. 58 */ 59 #define NFSD_BUFSIZE ((RPC_MAX_HEADER_WITH_AUTH+26)*XDR_UNIT + NFSSVC_MAXBLKSIZE) 60 61 struct readdir_cd { 62 __be32 err; /* 0, nfserr, or nfserr_eof */ 63 }; 64 65 66 extern struct svc_program nfsd_program; 67 extern const struct svc_version nfsd_version2, nfsd_version3, 68 nfsd_version4; 69 extern struct mutex nfsd_mutex; 70 extern spinlock_t nfsd_drc_lock; 71 extern unsigned long nfsd_drc_max_mem; 72 extern unsigned long nfsd_drc_mem_used; 73 74 extern const struct seq_operations nfs_exports_op; 75 76 /* 77 * Common void argument and result helpers 78 */ 79 struct nfsd_voidargs { }; 80 struct nfsd_voidres { }; 81 int nfssvc_decode_voidarg(struct svc_rqst *rqstp, __be32 *p); 82 int nfssvc_encode_voidres(struct svc_rqst *rqstp, __be32 *p); 83 84 /* 85 * Function prototypes. 86 */ 87 int nfsd_svc(int nrservs, struct net *net, const struct cred *cred); 88 int nfsd_dispatch(struct svc_rqst *rqstp, __be32 *statp); 89 90 int nfsd_nrthreads(struct net *); 91 int nfsd_nrpools(struct net *); 92 int nfsd_get_nrthreads(int n, int *, struct net *); 93 int nfsd_set_nrthreads(int n, int *, struct net *); 94 int nfsd_pool_stats_open(struct inode *, struct file *); 95 int nfsd_pool_stats_release(struct inode *, struct file *); 96 97 void nfsd_destroy(struct net *net); 98 99 bool i_am_nfsd(void); 100 101 int get_nfsdfs(struct net *); 102 103 struct nfsdfs_client { 104 struct kref cl_ref; 105 void (*cl_release)(struct kref *kref); 106 }; 107 108 struct nfsdfs_client *get_nfsdfs_client(struct inode *); 109 struct dentry *nfsd_client_mkdir(struct nfsd_net *nn, 110 struct nfsdfs_client *ncl, u32 id, const struct tree_descr *); 111 void nfsd_client_rmdir(struct dentry *dentry); 112 113 114 #if defined(CONFIG_NFSD_V2_ACL) || defined(CONFIG_NFSD_V3_ACL) 115 #ifdef CONFIG_NFSD_V2_ACL 116 extern const struct svc_version nfsd_acl_version2; 117 #else 118 #define nfsd_acl_version2 NULL 119 #endif 120 #ifdef CONFIG_NFSD_V3_ACL 121 extern const struct svc_version nfsd_acl_version3; 122 #else 123 #define nfsd_acl_version3 NULL 124 #endif 125 #endif 126 127 struct nfsd_net; 128 129 enum vers_op {NFSD_SET, NFSD_CLEAR, NFSD_TEST, NFSD_AVAIL }; 130 int nfsd_vers(struct nfsd_net *nn, int vers, enum vers_op change); 131 int nfsd_minorversion(struct nfsd_net *nn, u32 minorversion, enum vers_op change); 132 void nfsd_reset_versions(struct nfsd_net *nn); 133 int nfsd_create_serv(struct net *net); 134 135 extern int nfsd_max_blksize; 136 137 static inline int nfsd_v4client(struct svc_rqst *rq) 138 { 139 return rq->rq_prog == NFS_PROGRAM && rq->rq_vers == 4; 140 } 141 static inline struct user_namespace * 142 nfsd_user_namespace(const struct svc_rqst *rqstp) 143 { 144 const struct cred *cred = rqstp->rq_xprt->xpt_cred; 145 return cred ? cred->user_ns : &init_user_ns; 146 } 147 148 /* 149 * NFSv4 State 150 */ 151 #ifdef CONFIG_NFSD_V4 152 extern unsigned long max_delegations; 153 int nfsd4_init_slabs(void); 154 void nfsd4_free_slabs(void); 155 int nfs4_state_start(void); 156 int nfs4_state_start_net(struct net *net); 157 void nfs4_state_shutdown(void); 158 void nfs4_state_shutdown_net(struct net *net); 159 int nfs4_reset_recoverydir(char *recdir); 160 char * nfs4_recoverydir(void); 161 bool nfsd4_spo_must_allow(struct svc_rqst *rqstp); 162 #else 163 static inline int nfsd4_init_slabs(void) { return 0; } 164 static inline void nfsd4_free_slabs(void) { } 165 static inline int nfs4_state_start(void) { return 0; } 166 static inline int nfs4_state_start_net(struct net *net) { return 0; } 167 static inline void nfs4_state_shutdown(void) { } 168 static inline void nfs4_state_shutdown_net(struct net *net) { } 169 static inline int nfs4_reset_recoverydir(char *recdir) { return 0; } 170 static inline char * nfs4_recoverydir(void) {return NULL; } 171 static inline bool nfsd4_spo_must_allow(struct svc_rqst *rqstp) 172 { 173 return false; 174 } 175 #endif 176 177 /* 178 * lockd binding 179 */ 180 void nfsd_lockd_init(void); 181 void nfsd_lockd_shutdown(void); 182 183 184 /* 185 * These macros provide pre-xdr'ed values for faster operation. 186 */ 187 #define nfs_ok cpu_to_be32(NFS_OK) 188 #define nfserr_perm cpu_to_be32(NFSERR_PERM) 189 #define nfserr_noent cpu_to_be32(NFSERR_NOENT) 190 #define nfserr_io cpu_to_be32(NFSERR_IO) 191 #define nfserr_nxio cpu_to_be32(NFSERR_NXIO) 192 #define nfserr_eagain cpu_to_be32(NFSERR_EAGAIN) 193 #define nfserr_acces cpu_to_be32(NFSERR_ACCES) 194 #define nfserr_exist cpu_to_be32(NFSERR_EXIST) 195 #define nfserr_xdev cpu_to_be32(NFSERR_XDEV) 196 #define nfserr_nodev cpu_to_be32(NFSERR_NODEV) 197 #define nfserr_notdir cpu_to_be32(NFSERR_NOTDIR) 198 #define nfserr_isdir cpu_to_be32(NFSERR_ISDIR) 199 #define nfserr_inval cpu_to_be32(NFSERR_INVAL) 200 #define nfserr_fbig cpu_to_be32(NFSERR_FBIG) 201 #define nfserr_nospc cpu_to_be32(NFSERR_NOSPC) 202 #define nfserr_rofs cpu_to_be32(NFSERR_ROFS) 203 #define nfserr_mlink cpu_to_be32(NFSERR_MLINK) 204 #define nfserr_opnotsupp cpu_to_be32(NFSERR_OPNOTSUPP) 205 #define nfserr_nametoolong cpu_to_be32(NFSERR_NAMETOOLONG) 206 #define nfserr_notempty cpu_to_be32(NFSERR_NOTEMPTY) 207 #define nfserr_dquot cpu_to_be32(NFSERR_DQUOT) 208 #define nfserr_stale cpu_to_be32(NFSERR_STALE) 209 #define nfserr_remote cpu_to_be32(NFSERR_REMOTE) 210 #define nfserr_wflush cpu_to_be32(NFSERR_WFLUSH) 211 #define nfserr_badhandle cpu_to_be32(NFSERR_BADHANDLE) 212 #define nfserr_notsync cpu_to_be32(NFSERR_NOT_SYNC) 213 #define nfserr_badcookie cpu_to_be32(NFSERR_BAD_COOKIE) 214 #define nfserr_notsupp cpu_to_be32(NFSERR_NOTSUPP) 215 #define nfserr_toosmall cpu_to_be32(NFSERR_TOOSMALL) 216 #define nfserr_serverfault cpu_to_be32(NFSERR_SERVERFAULT) 217 #define nfserr_badtype cpu_to_be32(NFSERR_BADTYPE) 218 #define nfserr_jukebox cpu_to_be32(NFSERR_JUKEBOX) 219 #define nfserr_denied cpu_to_be32(NFSERR_DENIED) 220 #define nfserr_deadlock cpu_to_be32(NFSERR_DEADLOCK) 221 #define nfserr_expired cpu_to_be32(NFSERR_EXPIRED) 222 #define nfserr_bad_cookie cpu_to_be32(NFSERR_BAD_COOKIE) 223 #define nfserr_same cpu_to_be32(NFSERR_SAME) 224 #define nfserr_clid_inuse cpu_to_be32(NFSERR_CLID_INUSE) 225 #define nfserr_stale_clientid cpu_to_be32(NFSERR_STALE_CLIENTID) 226 #define nfserr_resource cpu_to_be32(NFSERR_RESOURCE) 227 #define nfserr_moved cpu_to_be32(NFSERR_MOVED) 228 #define nfserr_nofilehandle cpu_to_be32(NFSERR_NOFILEHANDLE) 229 #define nfserr_minor_vers_mismatch cpu_to_be32(NFSERR_MINOR_VERS_MISMATCH) 230 #define nfserr_share_denied cpu_to_be32(NFSERR_SHARE_DENIED) 231 #define nfserr_stale_stateid cpu_to_be32(NFSERR_STALE_STATEID) 232 #define nfserr_old_stateid cpu_to_be32(NFSERR_OLD_STATEID) 233 #define nfserr_bad_stateid cpu_to_be32(NFSERR_BAD_STATEID) 234 #define nfserr_bad_seqid cpu_to_be32(NFSERR_BAD_SEQID) 235 #define nfserr_symlink cpu_to_be32(NFSERR_SYMLINK) 236 #define nfserr_not_same cpu_to_be32(NFSERR_NOT_SAME) 237 #define nfserr_lock_range cpu_to_be32(NFSERR_LOCK_RANGE) 238 #define nfserr_restorefh cpu_to_be32(NFSERR_RESTOREFH) 239 #define nfserr_attrnotsupp cpu_to_be32(NFSERR_ATTRNOTSUPP) 240 #define nfserr_bad_xdr cpu_to_be32(NFSERR_BAD_XDR) 241 #define nfserr_openmode cpu_to_be32(NFSERR_OPENMODE) 242 #define nfserr_badowner cpu_to_be32(NFSERR_BADOWNER) 243 #define nfserr_locks_held cpu_to_be32(NFSERR_LOCKS_HELD) 244 #define nfserr_op_illegal cpu_to_be32(NFSERR_OP_ILLEGAL) 245 #define nfserr_grace cpu_to_be32(NFSERR_GRACE) 246 #define nfserr_no_grace cpu_to_be32(NFSERR_NO_GRACE) 247 #define nfserr_reclaim_bad cpu_to_be32(NFSERR_RECLAIM_BAD) 248 #define nfserr_badname cpu_to_be32(NFSERR_BADNAME) 249 #define nfserr_cb_path_down cpu_to_be32(NFSERR_CB_PATH_DOWN) 250 #define nfserr_locked cpu_to_be32(NFSERR_LOCKED) 251 #define nfserr_wrongsec cpu_to_be32(NFSERR_WRONGSEC) 252 #define nfserr_badiomode cpu_to_be32(NFS4ERR_BADIOMODE) 253 #define nfserr_badlayout cpu_to_be32(NFS4ERR_BADLAYOUT) 254 #define nfserr_bad_session_digest cpu_to_be32(NFS4ERR_BAD_SESSION_DIGEST) 255 #define nfserr_badsession cpu_to_be32(NFS4ERR_BADSESSION) 256 #define nfserr_badslot cpu_to_be32(NFS4ERR_BADSLOT) 257 #define nfserr_complete_already cpu_to_be32(NFS4ERR_COMPLETE_ALREADY) 258 #define nfserr_conn_not_bound_to_session cpu_to_be32(NFS4ERR_CONN_NOT_BOUND_TO_SESSION) 259 #define nfserr_deleg_already_wanted cpu_to_be32(NFS4ERR_DELEG_ALREADY_WANTED) 260 #define nfserr_back_chan_busy cpu_to_be32(NFS4ERR_BACK_CHAN_BUSY) 261 #define nfserr_layouttrylater cpu_to_be32(NFS4ERR_LAYOUTTRYLATER) 262 #define nfserr_layoutunavailable cpu_to_be32(NFS4ERR_LAYOUTUNAVAILABLE) 263 #define nfserr_nomatching_layout cpu_to_be32(NFS4ERR_NOMATCHING_LAYOUT) 264 #define nfserr_recallconflict cpu_to_be32(NFS4ERR_RECALLCONFLICT) 265 #define nfserr_unknown_layouttype cpu_to_be32(NFS4ERR_UNKNOWN_LAYOUTTYPE) 266 #define nfserr_seq_misordered cpu_to_be32(NFS4ERR_SEQ_MISORDERED) 267 #define nfserr_sequence_pos cpu_to_be32(NFS4ERR_SEQUENCE_POS) 268 #define nfserr_req_too_big cpu_to_be32(NFS4ERR_REQ_TOO_BIG) 269 #define nfserr_rep_too_big cpu_to_be32(NFS4ERR_REP_TOO_BIG) 270 #define nfserr_rep_too_big_to_cache cpu_to_be32(NFS4ERR_REP_TOO_BIG_TO_CACHE) 271 #define nfserr_retry_uncached_rep cpu_to_be32(NFS4ERR_RETRY_UNCACHED_REP) 272 #define nfserr_unsafe_compound cpu_to_be32(NFS4ERR_UNSAFE_COMPOUND) 273 #define nfserr_too_many_ops cpu_to_be32(NFS4ERR_TOO_MANY_OPS) 274 #define nfserr_op_not_in_session cpu_to_be32(NFS4ERR_OP_NOT_IN_SESSION) 275 #define nfserr_hash_alg_unsupp cpu_to_be32(NFS4ERR_HASH_ALG_UNSUPP) 276 #define nfserr_clientid_busy cpu_to_be32(NFS4ERR_CLIENTID_BUSY) 277 #define nfserr_pnfs_io_hole cpu_to_be32(NFS4ERR_PNFS_IO_HOLE) 278 #define nfserr_seq_false_retry cpu_to_be32(NFS4ERR_SEQ_FALSE_RETRY) 279 #define nfserr_bad_high_slot cpu_to_be32(NFS4ERR_BAD_HIGH_SLOT) 280 #define nfserr_deadsession cpu_to_be32(NFS4ERR_DEADSESSION) 281 #define nfserr_encr_alg_unsupp cpu_to_be32(NFS4ERR_ENCR_ALG_UNSUPP) 282 #define nfserr_pnfs_no_layout cpu_to_be32(NFS4ERR_PNFS_NO_LAYOUT) 283 #define nfserr_not_only_op cpu_to_be32(NFS4ERR_NOT_ONLY_OP) 284 #define nfserr_wrong_cred cpu_to_be32(NFS4ERR_WRONG_CRED) 285 #define nfserr_wrong_type cpu_to_be32(NFS4ERR_WRONG_TYPE) 286 #define nfserr_dirdeleg_unavail cpu_to_be32(NFS4ERR_DIRDELEG_UNAVAIL) 287 #define nfserr_reject_deleg cpu_to_be32(NFS4ERR_REJECT_DELEG) 288 #define nfserr_returnconflict cpu_to_be32(NFS4ERR_RETURNCONFLICT) 289 #define nfserr_deleg_revoked cpu_to_be32(NFS4ERR_DELEG_REVOKED) 290 #define nfserr_partner_notsupp cpu_to_be32(NFS4ERR_PARTNER_NOTSUPP) 291 #define nfserr_partner_no_auth cpu_to_be32(NFS4ERR_PARTNER_NO_AUTH) 292 #define nfserr_union_notsupp cpu_to_be32(NFS4ERR_UNION_NOTSUPP) 293 #define nfserr_offload_denied cpu_to_be32(NFS4ERR_OFFLOAD_DENIED) 294 #define nfserr_wrong_lfs cpu_to_be32(NFS4ERR_WRONG_LFS) 295 #define nfserr_badlabel cpu_to_be32(NFS4ERR_BADLABEL) 296 #define nfserr_file_open cpu_to_be32(NFS4ERR_FILE_OPEN) 297 #define nfserr_xattr2big cpu_to_be32(NFS4ERR_XATTR2BIG) 298 #define nfserr_noxattr cpu_to_be32(NFS4ERR_NOXATTR) 299 300 /* error codes for internal use */ 301 /* if a request fails due to kmalloc failure, it gets dropped. 302 * Client should resend eventually 303 */ 304 #define nfserr_dropit cpu_to_be32(30000) 305 /* end-of-file indicator in readdir */ 306 #define nfserr_eof cpu_to_be32(30001) 307 /* replay detected */ 308 #define nfserr_replay_me cpu_to_be32(11001) 309 /* nfs41 replay detected */ 310 #define nfserr_replay_cache cpu_to_be32(11002) 311 312 /* Check for dir entries '.' and '..' */ 313 #define isdotent(n, l) (l < 3 && n[0] == '.' && (l == 1 || n[1] == '.')) 314 315 #ifdef CONFIG_NFSD_V4 316 317 /* before processing a COMPOUND operation, we have to check that there 318 * is enough space in the buffer for XDR encode to succeed. otherwise, 319 * we might process an operation with side effects, and be unable to 320 * tell the client that the operation succeeded. 321 * 322 * COMPOUND_SLACK_SPACE - this is the minimum bytes of buffer space 323 * needed to encode an "ordinary" _successful_ operation. (GETATTR, 324 * READ, READDIR, and READLINK have their own buffer checks.) if we 325 * fall below this level, we fail the next operation with NFS4ERR_RESOURCE. 326 * 327 * COMPOUND_ERR_SLACK_SPACE - this is the minimum bytes of buffer space 328 * needed to encode an operation which has failed with NFS4ERR_RESOURCE. 329 * care is taken to ensure that we never fall below this level for any 330 * reason. 331 */ 332 #define COMPOUND_SLACK_SPACE 140 /* OP_GETFH */ 333 #define COMPOUND_ERR_SLACK_SPACE 16 /* OP_SETATTR */ 334 335 #define NFSD_LAUNDROMAT_MINTIMEOUT 1 /* seconds */ 336 337 /* 338 * The following attributes are currently not supported by the NFSv4 server: 339 * ARCHIVE (deprecated anyway) 340 * HIDDEN (unlikely to be supported any time soon) 341 * MIMETYPE (unlikely to be supported any time soon) 342 * QUOTA_* (will be supported in a forthcoming patch) 343 * SYSTEM (unlikely to be supported any time soon) 344 * TIME_BACKUP (unlikely to be supported any time soon) 345 * TIME_CREATE (unlikely to be supported any time soon) 346 */ 347 #define NFSD4_SUPPORTED_ATTRS_WORD0 \ 348 (FATTR4_WORD0_SUPPORTED_ATTRS | FATTR4_WORD0_TYPE | FATTR4_WORD0_FH_EXPIRE_TYPE \ 349 | FATTR4_WORD0_CHANGE | FATTR4_WORD0_SIZE | FATTR4_WORD0_LINK_SUPPORT \ 350 | FATTR4_WORD0_SYMLINK_SUPPORT | FATTR4_WORD0_NAMED_ATTR | FATTR4_WORD0_FSID \ 351 | FATTR4_WORD0_UNIQUE_HANDLES | FATTR4_WORD0_LEASE_TIME | FATTR4_WORD0_RDATTR_ERROR \ 352 | FATTR4_WORD0_ACLSUPPORT | FATTR4_WORD0_CANSETTIME | FATTR4_WORD0_CASE_INSENSITIVE \ 353 | FATTR4_WORD0_CASE_PRESERVING | FATTR4_WORD0_CHOWN_RESTRICTED \ 354 | FATTR4_WORD0_FILEHANDLE | FATTR4_WORD0_FILEID | FATTR4_WORD0_FILES_AVAIL \ 355 | FATTR4_WORD0_FILES_FREE | FATTR4_WORD0_FILES_TOTAL | FATTR4_WORD0_FS_LOCATIONS | FATTR4_WORD0_HOMOGENEOUS \ 356 | FATTR4_WORD0_MAXFILESIZE | FATTR4_WORD0_MAXLINK | FATTR4_WORD0_MAXNAME \ 357 | FATTR4_WORD0_MAXREAD | FATTR4_WORD0_MAXWRITE | FATTR4_WORD0_ACL) 358 359 #define NFSD4_SUPPORTED_ATTRS_WORD1 \ 360 (FATTR4_WORD1_MODE | FATTR4_WORD1_NO_TRUNC | FATTR4_WORD1_NUMLINKS \ 361 | FATTR4_WORD1_OWNER | FATTR4_WORD1_OWNER_GROUP | FATTR4_WORD1_RAWDEV \ 362 | FATTR4_WORD1_SPACE_AVAIL | FATTR4_WORD1_SPACE_FREE | FATTR4_WORD1_SPACE_TOTAL \ 363 | FATTR4_WORD1_SPACE_USED | FATTR4_WORD1_TIME_ACCESS | FATTR4_WORD1_TIME_ACCESS_SET \ 364 | FATTR4_WORD1_TIME_DELTA | FATTR4_WORD1_TIME_METADATA \ 365 | FATTR4_WORD1_TIME_MODIFY | FATTR4_WORD1_TIME_MODIFY_SET | FATTR4_WORD1_MOUNTED_ON_FILEID) 366 367 #define NFSD4_SUPPORTED_ATTRS_WORD2 0 368 369 /* 4.1 */ 370 #ifdef CONFIG_NFSD_PNFS 371 #define PNFSD_SUPPORTED_ATTRS_WORD1 FATTR4_WORD1_FS_LAYOUT_TYPES 372 #define PNFSD_SUPPORTED_ATTRS_WORD2 \ 373 (FATTR4_WORD2_LAYOUT_BLKSIZE | FATTR4_WORD2_LAYOUT_TYPES) 374 #else 375 #define PNFSD_SUPPORTED_ATTRS_WORD1 0 376 #define PNFSD_SUPPORTED_ATTRS_WORD2 0 377 #endif /* CONFIG_NFSD_PNFS */ 378 379 #define NFSD4_1_SUPPORTED_ATTRS_WORD0 \ 380 NFSD4_SUPPORTED_ATTRS_WORD0 381 382 #define NFSD4_1_SUPPORTED_ATTRS_WORD1 \ 383 (NFSD4_SUPPORTED_ATTRS_WORD1 | PNFSD_SUPPORTED_ATTRS_WORD1) 384 385 #define NFSD4_1_SUPPORTED_ATTRS_WORD2 \ 386 (NFSD4_SUPPORTED_ATTRS_WORD2 | PNFSD_SUPPORTED_ATTRS_WORD2 | \ 387 FATTR4_WORD2_SUPPATTR_EXCLCREAT) 388 389 /* 4.2 */ 390 #ifdef CONFIG_NFSD_V4_SECURITY_LABEL 391 #define NFSD4_2_SECURITY_ATTRS FATTR4_WORD2_SECURITY_LABEL 392 #else 393 #define NFSD4_2_SECURITY_ATTRS 0 394 #endif 395 396 #define NFSD4_2_SUPPORTED_ATTRS_WORD2 \ 397 (NFSD4_1_SUPPORTED_ATTRS_WORD2 | \ 398 FATTR4_WORD2_MODE_UMASK | \ 399 NFSD4_2_SECURITY_ATTRS | \ 400 FATTR4_WORD2_XATTR_SUPPORT) 401 402 extern const u32 nfsd_suppattrs[3][3]; 403 404 static inline __be32 nfsd4_set_netaddr(struct sockaddr *addr, 405 struct nfs42_netaddr *netaddr) 406 { 407 struct sockaddr_in *sin = (struct sockaddr_in *)addr; 408 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)addr; 409 unsigned int port; 410 size_t ret_addr, ret_port; 411 412 switch (addr->sa_family) { 413 case AF_INET: 414 port = ntohs(sin->sin_port); 415 sprintf(netaddr->netid, "tcp"); 416 netaddr->netid_len = 3; 417 break; 418 case AF_INET6: 419 port = ntohs(sin6->sin6_port); 420 sprintf(netaddr->netid, "tcp6"); 421 netaddr->netid_len = 4; 422 break; 423 default: 424 return nfserr_inval; 425 } 426 ret_addr = rpc_ntop(addr, netaddr->addr, sizeof(netaddr->addr)); 427 ret_port = snprintf(netaddr->addr + ret_addr, 428 RPCBIND_MAXUADDRLEN + 1 - ret_addr, 429 ".%u.%u", port >> 8, port & 0xff); 430 WARN_ON(ret_port >= RPCBIND_MAXUADDRLEN + 1 - ret_addr); 431 netaddr->addr_len = ret_addr + ret_port; 432 return 0; 433 } 434 435 static inline bool bmval_is_subset(const u32 *bm1, const u32 *bm2) 436 { 437 return !((bm1[0] & ~bm2[0]) || 438 (bm1[1] & ~bm2[1]) || 439 (bm1[2] & ~bm2[2])); 440 } 441 442 static inline bool nfsd_attrs_supported(u32 minorversion, const u32 *bmval) 443 { 444 return bmval_is_subset(bmval, nfsd_suppattrs[minorversion]); 445 } 446 447 /* These will return ERR_INVAL if specified in GETATTR or READDIR. */ 448 #define NFSD_WRITEONLY_ATTRS_WORD1 \ 449 (FATTR4_WORD1_TIME_ACCESS_SET | FATTR4_WORD1_TIME_MODIFY_SET) 450 451 /* 452 * These are the only attrs allowed in CREATE/OPEN/SETATTR. Don't add 453 * a writeable attribute here without also adding code to parse it to 454 * nfsd4_decode_fattr(). 455 */ 456 #define NFSD_WRITEABLE_ATTRS_WORD0 \ 457 (FATTR4_WORD0_SIZE | FATTR4_WORD0_ACL) 458 #define NFSD_WRITEABLE_ATTRS_WORD1 \ 459 (FATTR4_WORD1_MODE | FATTR4_WORD1_OWNER | FATTR4_WORD1_OWNER_GROUP \ 460 | FATTR4_WORD1_TIME_ACCESS_SET | FATTR4_WORD1_TIME_MODIFY_SET) 461 #ifdef CONFIG_NFSD_V4_SECURITY_LABEL 462 #define MAYBE_FATTR4_WORD2_SECURITY_LABEL \ 463 FATTR4_WORD2_SECURITY_LABEL 464 #else 465 #define MAYBE_FATTR4_WORD2_SECURITY_LABEL 0 466 #endif 467 #define NFSD_WRITEABLE_ATTRS_WORD2 \ 468 (FATTR4_WORD2_MODE_UMASK \ 469 | MAYBE_FATTR4_WORD2_SECURITY_LABEL) 470 471 #define NFSD_SUPPATTR_EXCLCREAT_WORD0 \ 472 NFSD_WRITEABLE_ATTRS_WORD0 473 /* 474 * we currently store the exclusive create verifier in the v_{a,m}time 475 * attributes so the client can't set these at create time using EXCLUSIVE4_1 476 */ 477 #define NFSD_SUPPATTR_EXCLCREAT_WORD1 \ 478 (NFSD_WRITEABLE_ATTRS_WORD1 & \ 479 ~(FATTR4_WORD1_TIME_ACCESS_SET | FATTR4_WORD1_TIME_MODIFY_SET)) 480 #define NFSD_SUPPATTR_EXCLCREAT_WORD2 \ 481 NFSD_WRITEABLE_ATTRS_WORD2 482 483 extern int nfsd4_is_junction(struct dentry *dentry); 484 extern int register_cld_notifier(void); 485 extern void unregister_cld_notifier(void); 486 #else /* CONFIG_NFSD_V4 */ 487 static inline int nfsd4_is_junction(struct dentry *dentry) 488 { 489 return 0; 490 } 491 492 #define register_cld_notifier() 0 493 #define unregister_cld_notifier() do { } while(0) 494 495 #endif /* CONFIG_NFSD_V4 */ 496 497 #endif /* LINUX_NFSD_NFSD_H */ 498