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 * Function prototypes. 78 */ 79 int nfsd_svc(int nrservs, struct net *net, const struct cred *cred); 80 int nfsd_dispatch(struct svc_rqst *rqstp, __be32 *statp); 81 82 int nfsd_nrthreads(struct net *); 83 int nfsd_nrpools(struct net *); 84 int nfsd_get_nrthreads(int n, int *, struct net *); 85 int nfsd_set_nrthreads(int n, int *, struct net *); 86 int nfsd_pool_stats_open(struct inode *, struct file *); 87 int nfsd_pool_stats_release(struct inode *, struct file *); 88 89 void nfsd_destroy(struct net *net); 90 91 bool i_am_nfsd(void); 92 93 struct nfsdfs_client { 94 struct kref cl_ref; 95 void (*cl_release)(struct kref *kref); 96 }; 97 98 struct nfsdfs_client *get_nfsdfs_client(struct inode *); 99 struct dentry *nfsd_client_mkdir(struct nfsd_net *nn, 100 struct nfsdfs_client *ncl, u32 id, const struct tree_descr *); 101 void nfsd_client_rmdir(struct dentry *dentry); 102 103 #if defined(CONFIG_NFSD_V2_ACL) || defined(CONFIG_NFSD_V3_ACL) 104 #ifdef CONFIG_NFSD_V2_ACL 105 extern const struct svc_version nfsd_acl_version2; 106 #else 107 #define nfsd_acl_version2 NULL 108 #endif 109 #ifdef CONFIG_NFSD_V3_ACL 110 extern const struct svc_version nfsd_acl_version3; 111 #else 112 #define nfsd_acl_version3 NULL 113 #endif 114 #endif 115 116 struct nfsd_net; 117 118 enum vers_op {NFSD_SET, NFSD_CLEAR, NFSD_TEST, NFSD_AVAIL }; 119 int nfsd_vers(struct nfsd_net *nn, int vers, enum vers_op change); 120 int nfsd_minorversion(struct nfsd_net *nn, u32 minorversion, enum vers_op change); 121 void nfsd_reset_versions(struct nfsd_net *nn); 122 int nfsd_create_serv(struct net *net); 123 124 extern int nfsd_max_blksize; 125 126 static inline int nfsd_v4client(struct svc_rqst *rq) 127 { 128 return rq->rq_prog == NFS_PROGRAM && rq->rq_vers == 4; 129 } 130 static inline struct user_namespace * 131 nfsd_user_namespace(const struct svc_rqst *rqstp) 132 { 133 const struct cred *cred = rqstp->rq_xprt->xpt_cred; 134 return cred ? cred->user_ns : &init_user_ns; 135 } 136 137 /* 138 * NFSv4 State 139 */ 140 #ifdef CONFIG_NFSD_V4 141 extern unsigned long max_delegations; 142 int nfsd4_init_slabs(void); 143 void nfsd4_free_slabs(void); 144 int nfs4_state_start(void); 145 int nfs4_state_start_net(struct net *net); 146 void nfs4_state_shutdown(void); 147 void nfs4_state_shutdown_net(struct net *net); 148 int nfs4_reset_recoverydir(char *recdir); 149 char * nfs4_recoverydir(void); 150 bool nfsd4_spo_must_allow(struct svc_rqst *rqstp); 151 #else 152 static inline int nfsd4_init_slabs(void) { return 0; } 153 static inline void nfsd4_free_slabs(void) { } 154 static inline int nfs4_state_start(void) { return 0; } 155 static inline int nfs4_state_start_net(struct net *net) { return 0; } 156 static inline void nfs4_state_shutdown(void) { } 157 static inline void nfs4_state_shutdown_net(struct net *net) { } 158 static inline int nfs4_reset_recoverydir(char *recdir) { return 0; } 159 static inline char * nfs4_recoverydir(void) {return NULL; } 160 static inline bool nfsd4_spo_must_allow(struct svc_rqst *rqstp) 161 { 162 return false; 163 } 164 #endif 165 166 /* 167 * lockd binding 168 */ 169 void nfsd_lockd_init(void); 170 void nfsd_lockd_shutdown(void); 171 172 173 /* 174 * These macros provide pre-xdr'ed values for faster operation. 175 */ 176 #define nfs_ok cpu_to_be32(NFS_OK) 177 #define nfserr_perm cpu_to_be32(NFSERR_PERM) 178 #define nfserr_noent cpu_to_be32(NFSERR_NOENT) 179 #define nfserr_io cpu_to_be32(NFSERR_IO) 180 #define nfserr_nxio cpu_to_be32(NFSERR_NXIO) 181 #define nfserr_eagain cpu_to_be32(NFSERR_EAGAIN) 182 #define nfserr_acces cpu_to_be32(NFSERR_ACCES) 183 #define nfserr_exist cpu_to_be32(NFSERR_EXIST) 184 #define nfserr_xdev cpu_to_be32(NFSERR_XDEV) 185 #define nfserr_nodev cpu_to_be32(NFSERR_NODEV) 186 #define nfserr_notdir cpu_to_be32(NFSERR_NOTDIR) 187 #define nfserr_isdir cpu_to_be32(NFSERR_ISDIR) 188 #define nfserr_inval cpu_to_be32(NFSERR_INVAL) 189 #define nfserr_fbig cpu_to_be32(NFSERR_FBIG) 190 #define nfserr_nospc cpu_to_be32(NFSERR_NOSPC) 191 #define nfserr_rofs cpu_to_be32(NFSERR_ROFS) 192 #define nfserr_mlink cpu_to_be32(NFSERR_MLINK) 193 #define nfserr_opnotsupp cpu_to_be32(NFSERR_OPNOTSUPP) 194 #define nfserr_nametoolong cpu_to_be32(NFSERR_NAMETOOLONG) 195 #define nfserr_notempty cpu_to_be32(NFSERR_NOTEMPTY) 196 #define nfserr_dquot cpu_to_be32(NFSERR_DQUOT) 197 #define nfserr_stale cpu_to_be32(NFSERR_STALE) 198 #define nfserr_remote cpu_to_be32(NFSERR_REMOTE) 199 #define nfserr_wflush cpu_to_be32(NFSERR_WFLUSH) 200 #define nfserr_badhandle cpu_to_be32(NFSERR_BADHANDLE) 201 #define nfserr_notsync cpu_to_be32(NFSERR_NOT_SYNC) 202 #define nfserr_badcookie cpu_to_be32(NFSERR_BAD_COOKIE) 203 #define nfserr_notsupp cpu_to_be32(NFSERR_NOTSUPP) 204 #define nfserr_toosmall cpu_to_be32(NFSERR_TOOSMALL) 205 #define nfserr_serverfault cpu_to_be32(NFSERR_SERVERFAULT) 206 #define nfserr_badtype cpu_to_be32(NFSERR_BADTYPE) 207 #define nfserr_jukebox cpu_to_be32(NFSERR_JUKEBOX) 208 #define nfserr_denied cpu_to_be32(NFSERR_DENIED) 209 #define nfserr_deadlock cpu_to_be32(NFSERR_DEADLOCK) 210 #define nfserr_expired cpu_to_be32(NFSERR_EXPIRED) 211 #define nfserr_bad_cookie cpu_to_be32(NFSERR_BAD_COOKIE) 212 #define nfserr_same cpu_to_be32(NFSERR_SAME) 213 #define nfserr_clid_inuse cpu_to_be32(NFSERR_CLID_INUSE) 214 #define nfserr_stale_clientid cpu_to_be32(NFSERR_STALE_CLIENTID) 215 #define nfserr_resource cpu_to_be32(NFSERR_RESOURCE) 216 #define nfserr_moved cpu_to_be32(NFSERR_MOVED) 217 #define nfserr_nofilehandle cpu_to_be32(NFSERR_NOFILEHANDLE) 218 #define nfserr_minor_vers_mismatch cpu_to_be32(NFSERR_MINOR_VERS_MISMATCH) 219 #define nfserr_share_denied cpu_to_be32(NFSERR_SHARE_DENIED) 220 #define nfserr_stale_stateid cpu_to_be32(NFSERR_STALE_STATEID) 221 #define nfserr_old_stateid cpu_to_be32(NFSERR_OLD_STATEID) 222 #define nfserr_bad_stateid cpu_to_be32(NFSERR_BAD_STATEID) 223 #define nfserr_bad_seqid cpu_to_be32(NFSERR_BAD_SEQID) 224 #define nfserr_symlink cpu_to_be32(NFSERR_SYMLINK) 225 #define nfserr_not_same cpu_to_be32(NFSERR_NOT_SAME) 226 #define nfserr_lock_range cpu_to_be32(NFSERR_LOCK_RANGE) 227 #define nfserr_restorefh cpu_to_be32(NFSERR_RESTOREFH) 228 #define nfserr_attrnotsupp cpu_to_be32(NFSERR_ATTRNOTSUPP) 229 #define nfserr_bad_xdr cpu_to_be32(NFSERR_BAD_XDR) 230 #define nfserr_openmode cpu_to_be32(NFSERR_OPENMODE) 231 #define nfserr_badowner cpu_to_be32(NFSERR_BADOWNER) 232 #define nfserr_locks_held cpu_to_be32(NFSERR_LOCKS_HELD) 233 #define nfserr_op_illegal cpu_to_be32(NFSERR_OP_ILLEGAL) 234 #define nfserr_grace cpu_to_be32(NFSERR_GRACE) 235 #define nfserr_no_grace cpu_to_be32(NFSERR_NO_GRACE) 236 #define nfserr_reclaim_bad cpu_to_be32(NFSERR_RECLAIM_BAD) 237 #define nfserr_badname cpu_to_be32(NFSERR_BADNAME) 238 #define nfserr_cb_path_down cpu_to_be32(NFSERR_CB_PATH_DOWN) 239 #define nfserr_locked cpu_to_be32(NFSERR_LOCKED) 240 #define nfserr_wrongsec cpu_to_be32(NFSERR_WRONGSEC) 241 #define nfserr_badiomode cpu_to_be32(NFS4ERR_BADIOMODE) 242 #define nfserr_badlayout cpu_to_be32(NFS4ERR_BADLAYOUT) 243 #define nfserr_bad_session_digest cpu_to_be32(NFS4ERR_BAD_SESSION_DIGEST) 244 #define nfserr_badsession cpu_to_be32(NFS4ERR_BADSESSION) 245 #define nfserr_badslot cpu_to_be32(NFS4ERR_BADSLOT) 246 #define nfserr_complete_already cpu_to_be32(NFS4ERR_COMPLETE_ALREADY) 247 #define nfserr_conn_not_bound_to_session cpu_to_be32(NFS4ERR_CONN_NOT_BOUND_TO_SESSION) 248 #define nfserr_deleg_already_wanted cpu_to_be32(NFS4ERR_DELEG_ALREADY_WANTED) 249 #define nfserr_back_chan_busy cpu_to_be32(NFS4ERR_BACK_CHAN_BUSY) 250 #define nfserr_layouttrylater cpu_to_be32(NFS4ERR_LAYOUTTRYLATER) 251 #define nfserr_layoutunavailable cpu_to_be32(NFS4ERR_LAYOUTUNAVAILABLE) 252 #define nfserr_nomatching_layout cpu_to_be32(NFS4ERR_NOMATCHING_LAYOUT) 253 #define nfserr_recallconflict cpu_to_be32(NFS4ERR_RECALLCONFLICT) 254 #define nfserr_unknown_layouttype cpu_to_be32(NFS4ERR_UNKNOWN_LAYOUTTYPE) 255 #define nfserr_seq_misordered cpu_to_be32(NFS4ERR_SEQ_MISORDERED) 256 #define nfserr_sequence_pos cpu_to_be32(NFS4ERR_SEQUENCE_POS) 257 #define nfserr_req_too_big cpu_to_be32(NFS4ERR_REQ_TOO_BIG) 258 #define nfserr_rep_too_big cpu_to_be32(NFS4ERR_REP_TOO_BIG) 259 #define nfserr_rep_too_big_to_cache cpu_to_be32(NFS4ERR_REP_TOO_BIG_TO_CACHE) 260 #define nfserr_retry_uncached_rep cpu_to_be32(NFS4ERR_RETRY_UNCACHED_REP) 261 #define nfserr_unsafe_compound cpu_to_be32(NFS4ERR_UNSAFE_COMPOUND) 262 #define nfserr_too_many_ops cpu_to_be32(NFS4ERR_TOO_MANY_OPS) 263 #define nfserr_op_not_in_session cpu_to_be32(NFS4ERR_OP_NOT_IN_SESSION) 264 #define nfserr_hash_alg_unsupp cpu_to_be32(NFS4ERR_HASH_ALG_UNSUPP) 265 #define nfserr_clientid_busy cpu_to_be32(NFS4ERR_CLIENTID_BUSY) 266 #define nfserr_pnfs_io_hole cpu_to_be32(NFS4ERR_PNFS_IO_HOLE) 267 #define nfserr_seq_false_retry cpu_to_be32(NFS4ERR_SEQ_FALSE_RETRY) 268 #define nfserr_bad_high_slot cpu_to_be32(NFS4ERR_BAD_HIGH_SLOT) 269 #define nfserr_deadsession cpu_to_be32(NFS4ERR_DEADSESSION) 270 #define nfserr_encr_alg_unsupp cpu_to_be32(NFS4ERR_ENCR_ALG_UNSUPP) 271 #define nfserr_pnfs_no_layout cpu_to_be32(NFS4ERR_PNFS_NO_LAYOUT) 272 #define nfserr_not_only_op cpu_to_be32(NFS4ERR_NOT_ONLY_OP) 273 #define nfserr_wrong_cred cpu_to_be32(NFS4ERR_WRONG_CRED) 274 #define nfserr_wrong_type cpu_to_be32(NFS4ERR_WRONG_TYPE) 275 #define nfserr_dirdeleg_unavail cpu_to_be32(NFS4ERR_DIRDELEG_UNAVAIL) 276 #define nfserr_reject_deleg cpu_to_be32(NFS4ERR_REJECT_DELEG) 277 #define nfserr_returnconflict cpu_to_be32(NFS4ERR_RETURNCONFLICT) 278 #define nfserr_deleg_revoked cpu_to_be32(NFS4ERR_DELEG_REVOKED) 279 #define nfserr_partner_notsupp cpu_to_be32(NFS4ERR_PARTNER_NOTSUPP) 280 #define nfserr_partner_no_auth cpu_to_be32(NFS4ERR_PARTNER_NO_AUTH) 281 #define nfserr_union_notsupp cpu_to_be32(NFS4ERR_UNION_NOTSUPP) 282 #define nfserr_offload_denied cpu_to_be32(NFS4ERR_OFFLOAD_DENIED) 283 #define nfserr_wrong_lfs cpu_to_be32(NFS4ERR_WRONG_LFS) 284 #define nfserr_badlabel cpu_to_be32(NFS4ERR_BADLABEL) 285 #define nfserr_file_open cpu_to_be32(NFS4ERR_FILE_OPEN) 286 287 /* error codes for internal use */ 288 /* if a request fails due to kmalloc failure, it gets dropped. 289 * Client should resend eventually 290 */ 291 #define nfserr_dropit cpu_to_be32(30000) 292 /* end-of-file indicator in readdir */ 293 #define nfserr_eof cpu_to_be32(30001) 294 /* replay detected */ 295 #define nfserr_replay_me cpu_to_be32(11001) 296 /* nfs41 replay detected */ 297 #define nfserr_replay_cache cpu_to_be32(11002) 298 299 /* Check for dir entries '.' and '..' */ 300 #define isdotent(n, l) (l < 3 && n[0] == '.' && (l == 1 || n[1] == '.')) 301 302 #ifdef CONFIG_NFSD_V4 303 304 /* before processing a COMPOUND operation, we have to check that there 305 * is enough space in the buffer for XDR encode to succeed. otherwise, 306 * we might process an operation with side effects, and be unable to 307 * tell the client that the operation succeeded. 308 * 309 * COMPOUND_SLACK_SPACE - this is the minimum bytes of buffer space 310 * needed to encode an "ordinary" _successful_ operation. (GETATTR, 311 * READ, READDIR, and READLINK have their own buffer checks.) if we 312 * fall below this level, we fail the next operation with NFS4ERR_RESOURCE. 313 * 314 * COMPOUND_ERR_SLACK_SPACE - this is the minimum bytes of buffer space 315 * needed to encode an operation which has failed with NFS4ERR_RESOURCE. 316 * care is taken to ensure that we never fall below this level for any 317 * reason. 318 */ 319 #define COMPOUND_SLACK_SPACE 140 /* OP_GETFH */ 320 #define COMPOUND_ERR_SLACK_SPACE 16 /* OP_SETATTR */ 321 322 #define NFSD_LAUNDROMAT_MINTIMEOUT 1 /* seconds */ 323 324 /* 325 * The following attributes are currently not supported by the NFSv4 server: 326 * ARCHIVE (deprecated anyway) 327 * HIDDEN (unlikely to be supported any time soon) 328 * MIMETYPE (unlikely to be supported any time soon) 329 * QUOTA_* (will be supported in a forthcoming patch) 330 * SYSTEM (unlikely to be supported any time soon) 331 * TIME_BACKUP (unlikely to be supported any time soon) 332 * TIME_CREATE (unlikely to be supported any time soon) 333 */ 334 #define NFSD4_SUPPORTED_ATTRS_WORD0 \ 335 (FATTR4_WORD0_SUPPORTED_ATTRS | FATTR4_WORD0_TYPE | FATTR4_WORD0_FH_EXPIRE_TYPE \ 336 | FATTR4_WORD0_CHANGE | FATTR4_WORD0_SIZE | FATTR4_WORD0_LINK_SUPPORT \ 337 | FATTR4_WORD0_SYMLINK_SUPPORT | FATTR4_WORD0_NAMED_ATTR | FATTR4_WORD0_FSID \ 338 | FATTR4_WORD0_UNIQUE_HANDLES | FATTR4_WORD0_LEASE_TIME | FATTR4_WORD0_RDATTR_ERROR \ 339 | FATTR4_WORD0_ACLSUPPORT | FATTR4_WORD0_CANSETTIME | FATTR4_WORD0_CASE_INSENSITIVE \ 340 | FATTR4_WORD0_CASE_PRESERVING | FATTR4_WORD0_CHOWN_RESTRICTED \ 341 | FATTR4_WORD0_FILEHANDLE | FATTR4_WORD0_FILEID | FATTR4_WORD0_FILES_AVAIL \ 342 | FATTR4_WORD0_FILES_FREE | FATTR4_WORD0_FILES_TOTAL | FATTR4_WORD0_FS_LOCATIONS | FATTR4_WORD0_HOMOGENEOUS \ 343 | FATTR4_WORD0_MAXFILESIZE | FATTR4_WORD0_MAXLINK | FATTR4_WORD0_MAXNAME \ 344 | FATTR4_WORD0_MAXREAD | FATTR4_WORD0_MAXWRITE | FATTR4_WORD0_ACL) 345 346 #define NFSD4_SUPPORTED_ATTRS_WORD1 \ 347 (FATTR4_WORD1_MODE | FATTR4_WORD1_NO_TRUNC | FATTR4_WORD1_NUMLINKS \ 348 | FATTR4_WORD1_OWNER | FATTR4_WORD1_OWNER_GROUP | FATTR4_WORD1_RAWDEV \ 349 | FATTR4_WORD1_SPACE_AVAIL | FATTR4_WORD1_SPACE_FREE | FATTR4_WORD1_SPACE_TOTAL \ 350 | FATTR4_WORD1_SPACE_USED | FATTR4_WORD1_TIME_ACCESS | FATTR4_WORD1_TIME_ACCESS_SET \ 351 | FATTR4_WORD1_TIME_DELTA | FATTR4_WORD1_TIME_METADATA \ 352 | FATTR4_WORD1_TIME_MODIFY | FATTR4_WORD1_TIME_MODIFY_SET | FATTR4_WORD1_MOUNTED_ON_FILEID) 353 354 #define NFSD4_SUPPORTED_ATTRS_WORD2 0 355 356 /* 4.1 */ 357 #ifdef CONFIG_NFSD_PNFS 358 #define PNFSD_SUPPORTED_ATTRS_WORD1 FATTR4_WORD1_FS_LAYOUT_TYPES 359 #define PNFSD_SUPPORTED_ATTRS_WORD2 \ 360 (FATTR4_WORD2_LAYOUT_BLKSIZE | FATTR4_WORD2_LAYOUT_TYPES) 361 #else 362 #define PNFSD_SUPPORTED_ATTRS_WORD1 0 363 #define PNFSD_SUPPORTED_ATTRS_WORD2 0 364 #endif /* CONFIG_NFSD_PNFS */ 365 366 #define NFSD4_1_SUPPORTED_ATTRS_WORD0 \ 367 NFSD4_SUPPORTED_ATTRS_WORD0 368 369 #define NFSD4_1_SUPPORTED_ATTRS_WORD1 \ 370 (NFSD4_SUPPORTED_ATTRS_WORD1 | PNFSD_SUPPORTED_ATTRS_WORD1) 371 372 #define NFSD4_1_SUPPORTED_ATTRS_WORD2 \ 373 (NFSD4_SUPPORTED_ATTRS_WORD2 | PNFSD_SUPPORTED_ATTRS_WORD2 | \ 374 FATTR4_WORD2_SUPPATTR_EXCLCREAT) 375 376 /* 4.2 */ 377 #ifdef CONFIG_NFSD_V4_SECURITY_LABEL 378 #define NFSD4_2_SECURITY_ATTRS FATTR4_WORD2_SECURITY_LABEL 379 #else 380 #define NFSD4_2_SECURITY_ATTRS 0 381 #endif 382 383 #define NFSD4_2_SUPPORTED_ATTRS_WORD2 \ 384 (NFSD4_1_SUPPORTED_ATTRS_WORD2 | \ 385 FATTR4_WORD2_CHANGE_ATTR_TYPE | \ 386 FATTR4_WORD2_MODE_UMASK | \ 387 NFSD4_2_SECURITY_ATTRS) 388 389 extern const u32 nfsd_suppattrs[3][3]; 390 391 static inline __be32 nfsd4_set_netaddr(struct sockaddr *addr, 392 struct nfs42_netaddr *netaddr) 393 { 394 struct sockaddr_in *sin = (struct sockaddr_in *)addr; 395 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)addr; 396 unsigned int port; 397 size_t ret_addr, ret_port; 398 399 switch (addr->sa_family) { 400 case AF_INET: 401 port = ntohs(sin->sin_port); 402 sprintf(netaddr->netid, "tcp"); 403 netaddr->netid_len = 3; 404 break; 405 case AF_INET6: 406 port = ntohs(sin6->sin6_port); 407 sprintf(netaddr->netid, "tcp6"); 408 netaddr->netid_len = 4; 409 break; 410 default: 411 return nfserr_inval; 412 } 413 ret_addr = rpc_ntop(addr, netaddr->addr, sizeof(netaddr->addr)); 414 ret_port = snprintf(netaddr->addr + ret_addr, 415 RPCBIND_MAXUADDRLEN + 1 - ret_addr, 416 ".%u.%u", port >> 8, port & 0xff); 417 WARN_ON(ret_port >= RPCBIND_MAXUADDRLEN + 1 - ret_addr); 418 netaddr->addr_len = ret_addr + ret_port; 419 return 0; 420 } 421 422 static inline bool bmval_is_subset(const u32 *bm1, const u32 *bm2) 423 { 424 return !((bm1[0] & ~bm2[0]) || 425 (bm1[1] & ~bm2[1]) || 426 (bm1[2] & ~bm2[2])); 427 } 428 429 static inline bool nfsd_attrs_supported(u32 minorversion, const u32 *bmval) 430 { 431 return bmval_is_subset(bmval, nfsd_suppattrs[minorversion]); 432 } 433 434 /* These will return ERR_INVAL if specified in GETATTR or READDIR. */ 435 #define NFSD_WRITEONLY_ATTRS_WORD1 \ 436 (FATTR4_WORD1_TIME_ACCESS_SET | FATTR4_WORD1_TIME_MODIFY_SET) 437 438 /* 439 * These are the only attrs allowed in CREATE/OPEN/SETATTR. Don't add 440 * a writeable attribute here without also adding code to parse it to 441 * nfsd4_decode_fattr(). 442 */ 443 #define NFSD_WRITEABLE_ATTRS_WORD0 \ 444 (FATTR4_WORD0_SIZE | FATTR4_WORD0_ACL) 445 #define NFSD_WRITEABLE_ATTRS_WORD1 \ 446 (FATTR4_WORD1_MODE | FATTR4_WORD1_OWNER | FATTR4_WORD1_OWNER_GROUP \ 447 | FATTR4_WORD1_TIME_ACCESS_SET | FATTR4_WORD1_TIME_MODIFY_SET) 448 #ifdef CONFIG_NFSD_V4_SECURITY_LABEL 449 #define MAYBE_FATTR4_WORD2_SECURITY_LABEL \ 450 FATTR4_WORD2_SECURITY_LABEL 451 #else 452 #define MAYBE_FATTR4_WORD2_SECURITY_LABEL 0 453 #endif 454 #define NFSD_WRITEABLE_ATTRS_WORD2 \ 455 (FATTR4_WORD2_MODE_UMASK \ 456 | MAYBE_FATTR4_WORD2_SECURITY_LABEL) 457 458 #define NFSD_SUPPATTR_EXCLCREAT_WORD0 \ 459 NFSD_WRITEABLE_ATTRS_WORD0 460 /* 461 * we currently store the exclusive create verifier in the v_{a,m}time 462 * attributes so the client can't set these at create time using EXCLUSIVE4_1 463 */ 464 #define NFSD_SUPPATTR_EXCLCREAT_WORD1 \ 465 (NFSD_WRITEABLE_ATTRS_WORD1 & \ 466 ~(FATTR4_WORD1_TIME_ACCESS_SET | FATTR4_WORD1_TIME_MODIFY_SET)) 467 #define NFSD_SUPPATTR_EXCLCREAT_WORD2 \ 468 NFSD_WRITEABLE_ATTRS_WORD2 469 470 extern int nfsd4_is_junction(struct dentry *dentry); 471 extern int register_cld_notifier(void); 472 extern void unregister_cld_notifier(void); 473 #else /* CONFIG_NFSD_V4 */ 474 static inline int nfsd4_is_junction(struct dentry *dentry) 475 { 476 return 0; 477 } 478 479 #define register_cld_notifier() 0 480 #define unregister_cld_notifier() do { } while(0) 481 482 #endif /* CONFIG_NFSD_V4 */ 483 484 #endif /* LINUX_NFSD_NFSD_H */ 485