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 "export.h" 28 #include "stats.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 bool nfssvc_decode_voidarg(struct svc_rqst *rqstp, 82 struct xdr_stream *xdr); 83 bool nfssvc_encode_voidres(struct svc_rqst *rqstp, 84 struct xdr_stream *xdr); 85 86 /* 87 * Function prototypes. 88 */ 89 int nfsd_svc(int nrservs, struct net *net, const struct cred *cred); 90 int nfsd_dispatch(struct svc_rqst *rqstp, __be32 *statp); 91 92 int nfsd_nrthreads(struct net *); 93 int nfsd_nrpools(struct net *); 94 int nfsd_get_nrthreads(int n, int *, struct net *); 95 int nfsd_set_nrthreads(int n, int *, struct net *); 96 int nfsd_pool_stats_open(struct inode *, struct file *); 97 int nfsd_pool_stats_release(struct inode *, struct file *); 98 void nfsd_shutdown_threads(struct net *net); 99 100 void nfsd_put(struct net *net); 101 102 bool i_am_nfsd(void); 103 104 struct nfsdfs_client { 105 struct kref cl_ref; 106 void (*cl_release)(struct kref *kref); 107 }; 108 109 struct nfsdfs_client *get_nfsdfs_client(struct inode *); 110 struct dentry *nfsd_client_mkdir(struct nfsd_net *nn, 111 struct nfsdfs_client *ncl, u32 id, 112 const struct tree_descr *, 113 struct dentry **fdentries); 114 void nfsd_client_rmdir(struct dentry *dentry); 115 116 117 #if defined(CONFIG_NFSD_V2_ACL) || defined(CONFIG_NFSD_V3_ACL) 118 #ifdef CONFIG_NFSD_V2_ACL 119 extern const struct svc_version nfsd_acl_version2; 120 #else 121 #define nfsd_acl_version2 NULL 122 #endif 123 #ifdef CONFIG_NFSD_V3_ACL 124 extern const struct svc_version nfsd_acl_version3; 125 #else 126 #define nfsd_acl_version3 NULL 127 #endif 128 #endif 129 130 struct nfsd_net; 131 132 enum vers_op {NFSD_SET, NFSD_CLEAR, NFSD_TEST, NFSD_AVAIL }; 133 int nfsd_vers(struct nfsd_net *nn, int vers, enum vers_op change); 134 int nfsd_minorversion(struct nfsd_net *nn, u32 minorversion, enum vers_op change); 135 void nfsd_reset_versions(struct nfsd_net *nn); 136 int nfsd_create_serv(struct net *net); 137 138 extern int nfsd_max_blksize; 139 140 static inline int nfsd_v4client(struct svc_rqst *rq) 141 { 142 return rq->rq_prog == NFS_PROGRAM && rq->rq_vers == 4; 143 } 144 static inline struct user_namespace * 145 nfsd_user_namespace(const struct svc_rqst *rqstp) 146 { 147 const struct cred *cred = rqstp->rq_xprt->xpt_cred; 148 return cred ? cred->user_ns : &init_user_ns; 149 } 150 151 /* 152 * NFSv4 State 153 */ 154 #ifdef CONFIG_NFSD_V4 155 extern unsigned long max_delegations; 156 int nfsd4_init_slabs(void); 157 void nfsd4_free_slabs(void); 158 int nfs4_state_start(void); 159 int nfs4_state_start_net(struct net *net); 160 void nfs4_state_shutdown(void); 161 void nfs4_state_shutdown_net(struct net *net); 162 int nfs4_reset_recoverydir(char *recdir); 163 char * nfs4_recoverydir(void); 164 bool nfsd4_spo_must_allow(struct svc_rqst *rqstp); 165 int nfsd4_create_laundry_wq(void); 166 void nfsd4_destroy_laundry_wq(void); 167 #else 168 static inline int nfsd4_init_slabs(void) { return 0; } 169 static inline void nfsd4_free_slabs(void) { } 170 static inline int nfs4_state_start(void) { return 0; } 171 static inline int nfs4_state_start_net(struct net *net) { return 0; } 172 static inline void nfs4_state_shutdown(void) { } 173 static inline void nfs4_state_shutdown_net(struct net *net) { } 174 static inline int nfs4_reset_recoverydir(char *recdir) { return 0; } 175 static inline char * nfs4_recoverydir(void) {return NULL; } 176 static inline bool nfsd4_spo_must_allow(struct svc_rqst *rqstp) 177 { 178 return false; 179 } 180 static inline int nfsd4_create_laundry_wq(void) { return 0; }; 181 static inline void nfsd4_destroy_laundry_wq(void) {}; 182 #endif 183 184 /* 185 * lockd binding 186 */ 187 void nfsd_lockd_init(void); 188 void nfsd_lockd_shutdown(void); 189 190 191 /* 192 * These macros provide pre-xdr'ed values for faster operation. 193 */ 194 #define nfs_ok cpu_to_be32(NFS_OK) 195 #define nfserr_perm cpu_to_be32(NFSERR_PERM) 196 #define nfserr_noent cpu_to_be32(NFSERR_NOENT) 197 #define nfserr_io cpu_to_be32(NFSERR_IO) 198 #define nfserr_nxio cpu_to_be32(NFSERR_NXIO) 199 #define nfserr_eagain cpu_to_be32(NFSERR_EAGAIN) 200 #define nfserr_acces cpu_to_be32(NFSERR_ACCES) 201 #define nfserr_exist cpu_to_be32(NFSERR_EXIST) 202 #define nfserr_xdev cpu_to_be32(NFSERR_XDEV) 203 #define nfserr_nodev cpu_to_be32(NFSERR_NODEV) 204 #define nfserr_notdir cpu_to_be32(NFSERR_NOTDIR) 205 #define nfserr_isdir cpu_to_be32(NFSERR_ISDIR) 206 #define nfserr_inval cpu_to_be32(NFSERR_INVAL) 207 #define nfserr_fbig cpu_to_be32(NFSERR_FBIG) 208 #define nfserr_nospc cpu_to_be32(NFSERR_NOSPC) 209 #define nfserr_rofs cpu_to_be32(NFSERR_ROFS) 210 #define nfserr_mlink cpu_to_be32(NFSERR_MLINK) 211 #define nfserr_opnotsupp cpu_to_be32(NFSERR_OPNOTSUPP) 212 #define nfserr_nametoolong cpu_to_be32(NFSERR_NAMETOOLONG) 213 #define nfserr_notempty cpu_to_be32(NFSERR_NOTEMPTY) 214 #define nfserr_dquot cpu_to_be32(NFSERR_DQUOT) 215 #define nfserr_stale cpu_to_be32(NFSERR_STALE) 216 #define nfserr_remote cpu_to_be32(NFSERR_REMOTE) 217 #define nfserr_wflush cpu_to_be32(NFSERR_WFLUSH) 218 #define nfserr_badhandle cpu_to_be32(NFSERR_BADHANDLE) 219 #define nfserr_notsync cpu_to_be32(NFSERR_NOT_SYNC) 220 #define nfserr_badcookie cpu_to_be32(NFSERR_BAD_COOKIE) 221 #define nfserr_notsupp cpu_to_be32(NFSERR_NOTSUPP) 222 #define nfserr_toosmall cpu_to_be32(NFSERR_TOOSMALL) 223 #define nfserr_serverfault cpu_to_be32(NFSERR_SERVERFAULT) 224 #define nfserr_badtype cpu_to_be32(NFSERR_BADTYPE) 225 #define nfserr_jukebox cpu_to_be32(NFSERR_JUKEBOX) 226 #define nfserr_denied cpu_to_be32(NFSERR_DENIED) 227 #define nfserr_deadlock cpu_to_be32(NFSERR_DEADLOCK) 228 #define nfserr_expired cpu_to_be32(NFSERR_EXPIRED) 229 #define nfserr_bad_cookie cpu_to_be32(NFSERR_BAD_COOKIE) 230 #define nfserr_same cpu_to_be32(NFSERR_SAME) 231 #define nfserr_clid_inuse cpu_to_be32(NFSERR_CLID_INUSE) 232 #define nfserr_stale_clientid cpu_to_be32(NFSERR_STALE_CLIENTID) 233 #define nfserr_resource cpu_to_be32(NFSERR_RESOURCE) 234 #define nfserr_moved cpu_to_be32(NFSERR_MOVED) 235 #define nfserr_nofilehandle cpu_to_be32(NFSERR_NOFILEHANDLE) 236 #define nfserr_minor_vers_mismatch cpu_to_be32(NFSERR_MINOR_VERS_MISMATCH) 237 #define nfserr_share_denied cpu_to_be32(NFSERR_SHARE_DENIED) 238 #define nfserr_stale_stateid cpu_to_be32(NFSERR_STALE_STATEID) 239 #define nfserr_old_stateid cpu_to_be32(NFSERR_OLD_STATEID) 240 #define nfserr_bad_stateid cpu_to_be32(NFSERR_BAD_STATEID) 241 #define nfserr_bad_seqid cpu_to_be32(NFSERR_BAD_SEQID) 242 #define nfserr_symlink cpu_to_be32(NFSERR_SYMLINK) 243 #define nfserr_not_same cpu_to_be32(NFSERR_NOT_SAME) 244 #define nfserr_lock_range cpu_to_be32(NFSERR_LOCK_RANGE) 245 #define nfserr_restorefh cpu_to_be32(NFSERR_RESTOREFH) 246 #define nfserr_attrnotsupp cpu_to_be32(NFSERR_ATTRNOTSUPP) 247 #define nfserr_bad_xdr cpu_to_be32(NFSERR_BAD_XDR) 248 #define nfserr_openmode cpu_to_be32(NFSERR_OPENMODE) 249 #define nfserr_badowner cpu_to_be32(NFSERR_BADOWNER) 250 #define nfserr_locks_held cpu_to_be32(NFSERR_LOCKS_HELD) 251 #define nfserr_op_illegal cpu_to_be32(NFSERR_OP_ILLEGAL) 252 #define nfserr_grace cpu_to_be32(NFSERR_GRACE) 253 #define nfserr_no_grace cpu_to_be32(NFSERR_NO_GRACE) 254 #define nfserr_reclaim_bad cpu_to_be32(NFSERR_RECLAIM_BAD) 255 #define nfserr_badname cpu_to_be32(NFSERR_BADNAME) 256 #define nfserr_cb_path_down cpu_to_be32(NFSERR_CB_PATH_DOWN) 257 #define nfserr_locked cpu_to_be32(NFSERR_LOCKED) 258 #define nfserr_wrongsec cpu_to_be32(NFSERR_WRONGSEC) 259 #define nfserr_badiomode cpu_to_be32(NFS4ERR_BADIOMODE) 260 #define nfserr_badlayout cpu_to_be32(NFS4ERR_BADLAYOUT) 261 #define nfserr_bad_session_digest cpu_to_be32(NFS4ERR_BAD_SESSION_DIGEST) 262 #define nfserr_badsession cpu_to_be32(NFS4ERR_BADSESSION) 263 #define nfserr_badslot cpu_to_be32(NFS4ERR_BADSLOT) 264 #define nfserr_complete_already cpu_to_be32(NFS4ERR_COMPLETE_ALREADY) 265 #define nfserr_conn_not_bound_to_session cpu_to_be32(NFS4ERR_CONN_NOT_BOUND_TO_SESSION) 266 #define nfserr_deleg_already_wanted cpu_to_be32(NFS4ERR_DELEG_ALREADY_WANTED) 267 #define nfserr_back_chan_busy cpu_to_be32(NFS4ERR_BACK_CHAN_BUSY) 268 #define nfserr_layouttrylater cpu_to_be32(NFS4ERR_LAYOUTTRYLATER) 269 #define nfserr_layoutunavailable cpu_to_be32(NFS4ERR_LAYOUTUNAVAILABLE) 270 #define nfserr_nomatching_layout cpu_to_be32(NFS4ERR_NOMATCHING_LAYOUT) 271 #define nfserr_recallconflict cpu_to_be32(NFS4ERR_RECALLCONFLICT) 272 #define nfserr_unknown_layouttype cpu_to_be32(NFS4ERR_UNKNOWN_LAYOUTTYPE) 273 #define nfserr_seq_misordered cpu_to_be32(NFS4ERR_SEQ_MISORDERED) 274 #define nfserr_sequence_pos cpu_to_be32(NFS4ERR_SEQUENCE_POS) 275 #define nfserr_req_too_big cpu_to_be32(NFS4ERR_REQ_TOO_BIG) 276 #define nfserr_rep_too_big cpu_to_be32(NFS4ERR_REP_TOO_BIG) 277 #define nfserr_rep_too_big_to_cache cpu_to_be32(NFS4ERR_REP_TOO_BIG_TO_CACHE) 278 #define nfserr_retry_uncached_rep cpu_to_be32(NFS4ERR_RETRY_UNCACHED_REP) 279 #define nfserr_unsafe_compound cpu_to_be32(NFS4ERR_UNSAFE_COMPOUND) 280 #define nfserr_too_many_ops cpu_to_be32(NFS4ERR_TOO_MANY_OPS) 281 #define nfserr_op_not_in_session cpu_to_be32(NFS4ERR_OP_NOT_IN_SESSION) 282 #define nfserr_hash_alg_unsupp cpu_to_be32(NFS4ERR_HASH_ALG_UNSUPP) 283 #define nfserr_clientid_busy cpu_to_be32(NFS4ERR_CLIENTID_BUSY) 284 #define nfserr_pnfs_io_hole cpu_to_be32(NFS4ERR_PNFS_IO_HOLE) 285 #define nfserr_seq_false_retry cpu_to_be32(NFS4ERR_SEQ_FALSE_RETRY) 286 #define nfserr_bad_high_slot cpu_to_be32(NFS4ERR_BAD_HIGH_SLOT) 287 #define nfserr_deadsession cpu_to_be32(NFS4ERR_DEADSESSION) 288 #define nfserr_encr_alg_unsupp cpu_to_be32(NFS4ERR_ENCR_ALG_UNSUPP) 289 #define nfserr_pnfs_no_layout cpu_to_be32(NFS4ERR_PNFS_NO_LAYOUT) 290 #define nfserr_not_only_op cpu_to_be32(NFS4ERR_NOT_ONLY_OP) 291 #define nfserr_wrong_cred cpu_to_be32(NFS4ERR_WRONG_CRED) 292 #define nfserr_wrong_type cpu_to_be32(NFS4ERR_WRONG_TYPE) 293 #define nfserr_dirdeleg_unavail cpu_to_be32(NFS4ERR_DIRDELEG_UNAVAIL) 294 #define nfserr_reject_deleg cpu_to_be32(NFS4ERR_REJECT_DELEG) 295 #define nfserr_returnconflict cpu_to_be32(NFS4ERR_RETURNCONFLICT) 296 #define nfserr_deleg_revoked cpu_to_be32(NFS4ERR_DELEG_REVOKED) 297 #define nfserr_partner_notsupp cpu_to_be32(NFS4ERR_PARTNER_NOTSUPP) 298 #define nfserr_partner_no_auth cpu_to_be32(NFS4ERR_PARTNER_NO_AUTH) 299 #define nfserr_union_notsupp cpu_to_be32(NFS4ERR_UNION_NOTSUPP) 300 #define nfserr_offload_denied cpu_to_be32(NFS4ERR_OFFLOAD_DENIED) 301 #define nfserr_wrong_lfs cpu_to_be32(NFS4ERR_WRONG_LFS) 302 #define nfserr_badlabel cpu_to_be32(NFS4ERR_BADLABEL) 303 #define nfserr_file_open cpu_to_be32(NFS4ERR_FILE_OPEN) 304 #define nfserr_xattr2big cpu_to_be32(NFS4ERR_XATTR2BIG) 305 #define nfserr_noxattr cpu_to_be32(NFS4ERR_NOXATTR) 306 307 /* error codes for internal use */ 308 /* if a request fails due to kmalloc failure, it gets dropped. 309 * Client should resend eventually 310 */ 311 #define nfserr_dropit cpu_to_be32(30000) 312 /* end-of-file indicator in readdir */ 313 #define nfserr_eof cpu_to_be32(30001) 314 /* replay detected */ 315 #define nfserr_replay_me cpu_to_be32(11001) 316 /* nfs41 replay detected */ 317 #define nfserr_replay_cache cpu_to_be32(11002) 318 319 /* Check for dir entries '.' and '..' */ 320 #define isdotent(n, l) (l < 3 && n[0] == '.' && (l == 1 || n[1] == '.')) 321 322 #ifdef CONFIG_NFSD_V4 323 324 /* before processing a COMPOUND operation, we have to check that there 325 * is enough space in the buffer for XDR encode to succeed. otherwise, 326 * we might process an operation with side effects, and be unable to 327 * tell the client that the operation succeeded. 328 * 329 * COMPOUND_SLACK_SPACE - this is the minimum bytes of buffer space 330 * needed to encode an "ordinary" _successful_ operation. (GETATTR, 331 * READ, READDIR, and READLINK have their own buffer checks.) if we 332 * fall below this level, we fail the next operation with NFS4ERR_RESOURCE. 333 * 334 * COMPOUND_ERR_SLACK_SPACE - this is the minimum bytes of buffer space 335 * needed to encode an operation which has failed with NFS4ERR_RESOURCE. 336 * care is taken to ensure that we never fall below this level for any 337 * reason. 338 */ 339 #define COMPOUND_SLACK_SPACE 140 /* OP_GETFH */ 340 #define COMPOUND_ERR_SLACK_SPACE 16 /* OP_SETATTR */ 341 342 #define NFSD_LAUNDROMAT_MINTIMEOUT 1 /* seconds */ 343 #define NFSD_COURTESY_CLIENT_TIMEOUT (24 * 60 * 60) /* seconds */ 344 345 /* 346 * The following attributes are currently not supported by the NFSv4 server: 347 * ARCHIVE (deprecated anyway) 348 * HIDDEN (unlikely to be supported any time soon) 349 * MIMETYPE (unlikely to be supported any time soon) 350 * QUOTA_* (will be supported in a forthcoming patch) 351 * SYSTEM (unlikely to be supported any time soon) 352 * TIME_BACKUP (unlikely to be supported any time soon) 353 * TIME_CREATE (unlikely to be supported any time soon) 354 */ 355 #define NFSD4_SUPPORTED_ATTRS_WORD0 \ 356 (FATTR4_WORD0_SUPPORTED_ATTRS | FATTR4_WORD0_TYPE | FATTR4_WORD0_FH_EXPIRE_TYPE \ 357 | FATTR4_WORD0_CHANGE | FATTR4_WORD0_SIZE | FATTR4_WORD0_LINK_SUPPORT \ 358 | FATTR4_WORD0_SYMLINK_SUPPORT | FATTR4_WORD0_NAMED_ATTR | FATTR4_WORD0_FSID \ 359 | FATTR4_WORD0_UNIQUE_HANDLES | FATTR4_WORD0_LEASE_TIME | FATTR4_WORD0_RDATTR_ERROR \ 360 | FATTR4_WORD0_ACLSUPPORT | FATTR4_WORD0_CANSETTIME | FATTR4_WORD0_CASE_INSENSITIVE \ 361 | FATTR4_WORD0_CASE_PRESERVING | FATTR4_WORD0_CHOWN_RESTRICTED \ 362 | FATTR4_WORD0_FILEHANDLE | FATTR4_WORD0_FILEID | FATTR4_WORD0_FILES_AVAIL \ 363 | FATTR4_WORD0_FILES_FREE | FATTR4_WORD0_FILES_TOTAL | FATTR4_WORD0_FS_LOCATIONS | FATTR4_WORD0_HOMOGENEOUS \ 364 | FATTR4_WORD0_MAXFILESIZE | FATTR4_WORD0_MAXLINK | FATTR4_WORD0_MAXNAME \ 365 | FATTR4_WORD0_MAXREAD | FATTR4_WORD0_MAXWRITE | FATTR4_WORD0_ACL) 366 367 #define NFSD4_SUPPORTED_ATTRS_WORD1 \ 368 (FATTR4_WORD1_MODE | FATTR4_WORD1_NO_TRUNC | FATTR4_WORD1_NUMLINKS \ 369 | FATTR4_WORD1_OWNER | FATTR4_WORD1_OWNER_GROUP | FATTR4_WORD1_RAWDEV \ 370 | FATTR4_WORD1_SPACE_AVAIL | FATTR4_WORD1_SPACE_FREE | FATTR4_WORD1_SPACE_TOTAL \ 371 | FATTR4_WORD1_SPACE_USED | FATTR4_WORD1_TIME_ACCESS | FATTR4_WORD1_TIME_ACCESS_SET \ 372 | FATTR4_WORD1_TIME_DELTA | FATTR4_WORD1_TIME_METADATA | FATTR4_WORD1_TIME_CREATE \ 373 | FATTR4_WORD1_TIME_MODIFY | FATTR4_WORD1_TIME_MODIFY_SET | FATTR4_WORD1_MOUNTED_ON_FILEID) 374 375 #define NFSD4_SUPPORTED_ATTRS_WORD2 0 376 377 /* 4.1 */ 378 #ifdef CONFIG_NFSD_PNFS 379 #define PNFSD_SUPPORTED_ATTRS_WORD1 FATTR4_WORD1_FS_LAYOUT_TYPES 380 #define PNFSD_SUPPORTED_ATTRS_WORD2 \ 381 (FATTR4_WORD2_LAYOUT_BLKSIZE | FATTR4_WORD2_LAYOUT_TYPES) 382 #else 383 #define PNFSD_SUPPORTED_ATTRS_WORD1 0 384 #define PNFSD_SUPPORTED_ATTRS_WORD2 0 385 #endif /* CONFIG_NFSD_PNFS */ 386 387 #define NFSD4_1_SUPPORTED_ATTRS_WORD0 \ 388 NFSD4_SUPPORTED_ATTRS_WORD0 389 390 #define NFSD4_1_SUPPORTED_ATTRS_WORD1 \ 391 (NFSD4_SUPPORTED_ATTRS_WORD1 | PNFSD_SUPPORTED_ATTRS_WORD1) 392 393 #define NFSD4_1_SUPPORTED_ATTRS_WORD2 \ 394 (NFSD4_SUPPORTED_ATTRS_WORD2 | PNFSD_SUPPORTED_ATTRS_WORD2 | \ 395 FATTR4_WORD2_SUPPATTR_EXCLCREAT) 396 397 /* 4.2 */ 398 #ifdef CONFIG_NFSD_V4_SECURITY_LABEL 399 #define NFSD4_2_SECURITY_ATTRS FATTR4_WORD2_SECURITY_LABEL 400 #else 401 #define NFSD4_2_SECURITY_ATTRS 0 402 #endif 403 404 #define NFSD4_2_SUPPORTED_ATTRS_WORD2 \ 405 (NFSD4_1_SUPPORTED_ATTRS_WORD2 | \ 406 FATTR4_WORD2_MODE_UMASK | \ 407 NFSD4_2_SECURITY_ATTRS | \ 408 FATTR4_WORD2_XATTR_SUPPORT) 409 410 extern const u32 nfsd_suppattrs[3][3]; 411 412 static inline __be32 nfsd4_set_netaddr(struct sockaddr *addr, 413 struct nfs42_netaddr *netaddr) 414 { 415 struct sockaddr_in *sin = (struct sockaddr_in *)addr; 416 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)addr; 417 unsigned int port; 418 size_t ret_addr, ret_port; 419 420 switch (addr->sa_family) { 421 case AF_INET: 422 port = ntohs(sin->sin_port); 423 sprintf(netaddr->netid, "tcp"); 424 netaddr->netid_len = 3; 425 break; 426 case AF_INET6: 427 port = ntohs(sin6->sin6_port); 428 sprintf(netaddr->netid, "tcp6"); 429 netaddr->netid_len = 4; 430 break; 431 default: 432 return nfserr_inval; 433 } 434 ret_addr = rpc_ntop(addr, netaddr->addr, sizeof(netaddr->addr)); 435 ret_port = snprintf(netaddr->addr + ret_addr, 436 RPCBIND_MAXUADDRLEN + 1 - ret_addr, 437 ".%u.%u", port >> 8, port & 0xff); 438 WARN_ON(ret_port >= RPCBIND_MAXUADDRLEN + 1 - ret_addr); 439 netaddr->addr_len = ret_addr + ret_port; 440 return 0; 441 } 442 443 static inline bool bmval_is_subset(const u32 *bm1, const u32 *bm2) 444 { 445 return !((bm1[0] & ~bm2[0]) || 446 (bm1[1] & ~bm2[1]) || 447 (bm1[2] & ~bm2[2])); 448 } 449 450 static inline bool nfsd_attrs_supported(u32 minorversion, const u32 *bmval) 451 { 452 return bmval_is_subset(bmval, nfsd_suppattrs[minorversion]); 453 } 454 455 /* These will return ERR_INVAL if specified in GETATTR or READDIR. */ 456 #define NFSD_WRITEONLY_ATTRS_WORD1 \ 457 (FATTR4_WORD1_TIME_ACCESS_SET | FATTR4_WORD1_TIME_MODIFY_SET) 458 459 /* 460 * These are the only attrs allowed in CREATE/OPEN/SETATTR. Don't add 461 * a writeable attribute here without also adding code to parse it to 462 * nfsd4_decode_fattr(). 463 */ 464 #define NFSD_WRITEABLE_ATTRS_WORD0 \ 465 (FATTR4_WORD0_SIZE | FATTR4_WORD0_ACL) 466 #define NFSD_WRITEABLE_ATTRS_WORD1 \ 467 (FATTR4_WORD1_MODE | FATTR4_WORD1_OWNER | FATTR4_WORD1_OWNER_GROUP \ 468 | FATTR4_WORD1_TIME_ACCESS_SET | FATTR4_WORD1_TIME_CREATE \ 469 | FATTR4_WORD1_TIME_MODIFY_SET) 470 #ifdef CONFIG_NFSD_V4_SECURITY_LABEL 471 #define MAYBE_FATTR4_WORD2_SECURITY_LABEL \ 472 FATTR4_WORD2_SECURITY_LABEL 473 #else 474 #define MAYBE_FATTR4_WORD2_SECURITY_LABEL 0 475 #endif 476 #define NFSD_WRITEABLE_ATTRS_WORD2 \ 477 (FATTR4_WORD2_MODE_UMASK \ 478 | MAYBE_FATTR4_WORD2_SECURITY_LABEL) 479 480 #define NFSD_SUPPATTR_EXCLCREAT_WORD0 \ 481 NFSD_WRITEABLE_ATTRS_WORD0 482 /* 483 * we currently store the exclusive create verifier in the v_{a,m}time 484 * attributes so the client can't set these at create time using EXCLUSIVE4_1 485 */ 486 #define NFSD_SUPPATTR_EXCLCREAT_WORD1 \ 487 (NFSD_WRITEABLE_ATTRS_WORD1 & \ 488 ~(FATTR4_WORD1_TIME_ACCESS_SET | FATTR4_WORD1_TIME_MODIFY_SET)) 489 #define NFSD_SUPPATTR_EXCLCREAT_WORD2 \ 490 NFSD_WRITEABLE_ATTRS_WORD2 491 492 extern int nfsd4_is_junction(struct dentry *dentry); 493 extern int register_cld_notifier(void); 494 extern void unregister_cld_notifier(void); 495 #ifdef CONFIG_NFSD_V4_2_INTER_SSC 496 extern void nfsd4_ssc_init_umount_work(struct nfsd_net *nn); 497 #endif 498 499 #else /* CONFIG_NFSD_V4 */ 500 static inline int nfsd4_is_junction(struct dentry *dentry) 501 { 502 return 0; 503 } 504 505 #define register_cld_notifier() 0 506 #define unregister_cld_notifier() do { } while(0) 507 508 #endif /* CONFIG_NFSD_V4 */ 509 510 #endif /* LINUX_NFSD_NFSD_H */ 511