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 "export.h" 27 28 #undef ifdebug 29 #ifdef CONFIG_SUNRPC_DEBUG 30 # define ifdebug(flag) if (nfsd_debug & NFSDDBG_##flag) 31 #else 32 # define ifdebug(flag) if (0) 33 #endif 34 35 /* 36 * nfsd version 37 */ 38 #define NFSD_MINVERS 2 39 #define NFSD_MAXVERS 4 40 #define NFSD_SUPPORTED_MINOR_VERSION 2 41 bool nfsd_support_version(int vers); 42 43 #include "netns.h" 44 #include "stats.h" 45 46 /* 47 * Maximum blocksizes supported by daemon under various circumstances. 48 */ 49 #define NFSSVC_MAXBLKSIZE RPCSVC_MAXPAYLOAD 50 /* NFSv2 is limited by the protocol specification, see RFC 1094 */ 51 #define NFSSVC_MAXBLKSIZE_V2 (8*1024) 52 53 54 /* 55 * Largest number of bytes we need to allocate for an NFS 56 * call or reply. Used to control buffer sizes. We use 57 * the length of v3 WRITE, READDIR and READDIR replies 58 * which are an RPC header, up to 26 XDR units of reply 59 * data, and some page data. 60 * 61 * Note that accuracy here doesn't matter too much as the 62 * size is rounded up to a page size when allocating space. 63 */ 64 #define NFSD_BUFSIZE ((RPC_MAX_HEADER_WITH_AUTH+26)*XDR_UNIT + NFSSVC_MAXBLKSIZE) 65 66 struct readdir_cd { 67 __be32 err; /* 0, nfserr, or nfserr_eof */ 68 }; 69 70 /* Maximum number of operations per session compound */ 71 #define NFSD_MAX_OPS_PER_COMPOUND 50 72 73 struct nfsd_genl_rqstp { 74 struct sockaddr rq_daddr; 75 struct sockaddr rq_saddr; 76 unsigned long rq_flags; 77 ktime_t rq_stime; 78 __be32 rq_xid; 79 u32 rq_vers; 80 u32 rq_prog; 81 u32 rq_proc; 82 83 /* NFSv4 compound */ 84 u32 rq_opcnt; 85 u32 rq_opnum[NFSD_MAX_OPS_PER_COMPOUND]; 86 }; 87 88 extern struct svc_program nfsd_programs[]; 89 extern const struct svc_version nfsd_version2, nfsd_version3, nfsd_version4; 90 extern struct mutex nfsd_mutex; 91 extern spinlock_t nfsd_drc_lock; 92 extern unsigned long nfsd_drc_max_mem; 93 extern unsigned long nfsd_drc_mem_used; 94 extern atomic_t nfsd_th_cnt; /* number of available threads */ 95 96 extern const struct seq_operations nfs_exports_op; 97 98 /* 99 * Common void argument and result helpers 100 */ 101 struct nfsd_voidargs { }; 102 struct nfsd_voidres { }; 103 bool nfssvc_decode_voidarg(struct svc_rqst *rqstp, 104 struct xdr_stream *xdr); 105 bool nfssvc_encode_voidres(struct svc_rqst *rqstp, 106 struct xdr_stream *xdr); 107 108 /* 109 * Function prototypes. 110 */ 111 int nfsd_svc(int n, int *nservers, struct net *net, 112 const struct cred *cred, const char *scope); 113 int nfsd_dispatch(struct svc_rqst *rqstp); 114 115 int nfsd_nrthreads(struct net *); 116 int nfsd_nrpools(struct net *); 117 int nfsd_get_nrthreads(int n, int *, struct net *); 118 int nfsd_set_nrthreads(int n, int *, struct net *); 119 void nfsd_shutdown_threads(struct net *net); 120 121 struct svc_rqst *nfsd_current_rqst(void); 122 123 struct nfsdfs_client { 124 struct kref cl_ref; 125 void (*cl_release)(struct kref *kref); 126 }; 127 128 struct nfsdfs_client *get_nfsdfs_client(struct inode *); 129 struct dentry *nfsd_client_mkdir(struct nfsd_net *nn, 130 struct nfsdfs_client *ncl, u32 id, 131 const struct tree_descr *, 132 struct dentry **fdentries); 133 void nfsd_client_rmdir(struct dentry *dentry); 134 135 136 #if defined(CONFIG_NFSD_V2_ACL) || defined(CONFIG_NFSD_V3_ACL) 137 #ifdef CONFIG_NFSD_V2_ACL 138 extern const struct svc_version nfsd_acl_version2; 139 #else 140 #define nfsd_acl_version2 NULL 141 #endif 142 #ifdef CONFIG_NFSD_V3_ACL 143 extern const struct svc_version nfsd_acl_version3; 144 #else 145 #define nfsd_acl_version3 NULL 146 #endif 147 #endif 148 149 #if IS_ENABLED(CONFIG_NFS_LOCALIO) 150 extern const struct svc_version localio_version1; 151 #endif 152 153 struct nfsd_net; 154 155 enum vers_op {NFSD_SET, NFSD_CLEAR, NFSD_TEST, NFSD_AVAIL }; 156 int nfsd_vers(struct nfsd_net *nn, int vers, enum vers_op change); 157 int nfsd_minorversion(struct nfsd_net *nn, u32 minorversion, enum vers_op change); 158 void nfsd_reset_versions(struct nfsd_net *nn); 159 int nfsd_create_serv(struct net *net); 160 void nfsd_destroy_serv(struct net *net); 161 162 extern int nfsd_max_blksize; 163 164 static inline int nfsd_v4client(struct svc_rqst *rq) 165 { 166 return rq && rq->rq_prog == NFS_PROGRAM && rq->rq_vers == 4; 167 } 168 static inline struct user_namespace * 169 nfsd_user_namespace(const struct svc_rqst *rqstp) 170 { 171 const struct cred *cred = rqstp->rq_xprt->xpt_cred; 172 return cred ? cred->user_ns : &init_user_ns; 173 } 174 175 /* 176 * NFSv4 State 177 */ 178 #ifdef CONFIG_NFSD_V4 179 extern unsigned long max_delegations; 180 int nfsd4_init_slabs(void); 181 void nfsd4_free_slabs(void); 182 int nfs4_state_start(void); 183 int nfs4_state_start_net(struct net *net); 184 void nfs4_state_shutdown(void); 185 void nfs4_state_shutdown_net(struct net *net); 186 int nfs4_reset_recoverydir(char *recdir); 187 char * nfs4_recoverydir(void); 188 bool nfsd4_spo_must_allow(struct svc_rqst *rqstp); 189 int nfsd4_create_laundry_wq(void); 190 void nfsd4_destroy_laundry_wq(void); 191 bool nfsd_wait_for_delegreturn(struct svc_rqst *rqstp, struct inode *inode); 192 #else 193 static inline int nfsd4_init_slabs(void) { return 0; } 194 static inline void nfsd4_free_slabs(void) { } 195 static inline int nfs4_state_start(void) { return 0; } 196 static inline int nfs4_state_start_net(struct net *net) { return 0; } 197 static inline void nfs4_state_shutdown(void) { } 198 static inline void nfs4_state_shutdown_net(struct net *net) { } 199 static inline int nfs4_reset_recoverydir(char *recdir) { return 0; } 200 static inline char * nfs4_recoverydir(void) {return NULL; } 201 static inline bool nfsd4_spo_must_allow(struct svc_rqst *rqstp) 202 { 203 return false; 204 } 205 static inline int nfsd4_create_laundry_wq(void) { return 0; }; 206 static inline void nfsd4_destroy_laundry_wq(void) {}; 207 static inline bool nfsd_wait_for_delegreturn(struct svc_rqst *rqstp, 208 struct inode *inode) 209 { 210 return false; 211 } 212 #endif 213 214 /* 215 * lockd binding 216 */ 217 void nfsd_lockd_init(void); 218 void nfsd_lockd_shutdown(void); 219 220 221 /* 222 * These macros provide pre-xdr'ed values for faster operation. 223 */ 224 #define nfs_ok cpu_to_be32(NFS_OK) 225 #define nfserr_perm cpu_to_be32(NFSERR_PERM) 226 #define nfserr_noent cpu_to_be32(NFSERR_NOENT) 227 #define nfserr_io cpu_to_be32(NFSERR_IO) 228 #define nfserr_nxio cpu_to_be32(NFSERR_NXIO) 229 #define nfserr_eagain cpu_to_be32(NFSERR_EAGAIN) 230 #define nfserr_acces cpu_to_be32(NFSERR_ACCES) 231 #define nfserr_exist cpu_to_be32(NFSERR_EXIST) 232 #define nfserr_xdev cpu_to_be32(NFSERR_XDEV) 233 #define nfserr_nodev cpu_to_be32(NFSERR_NODEV) 234 #define nfserr_notdir cpu_to_be32(NFSERR_NOTDIR) 235 #define nfserr_isdir cpu_to_be32(NFSERR_ISDIR) 236 #define nfserr_inval cpu_to_be32(NFSERR_INVAL) 237 #define nfserr_fbig cpu_to_be32(NFSERR_FBIG) 238 #define nfserr_nospc cpu_to_be32(NFSERR_NOSPC) 239 #define nfserr_rofs cpu_to_be32(NFSERR_ROFS) 240 #define nfserr_mlink cpu_to_be32(NFSERR_MLINK) 241 #define nfserr_nametoolong cpu_to_be32(NFSERR_NAMETOOLONG) 242 #define nfserr_notempty cpu_to_be32(NFSERR_NOTEMPTY) 243 #define nfserr_dquot cpu_to_be32(NFSERR_DQUOT) 244 #define nfserr_stale cpu_to_be32(NFSERR_STALE) 245 #define nfserr_remote cpu_to_be32(NFSERR_REMOTE) 246 #define nfserr_wflush cpu_to_be32(NFSERR_WFLUSH) 247 #define nfserr_badhandle cpu_to_be32(NFSERR_BADHANDLE) 248 #define nfserr_notsync cpu_to_be32(NFSERR_NOT_SYNC) 249 #define nfserr_badcookie cpu_to_be32(NFSERR_BAD_COOKIE) 250 #define nfserr_notsupp cpu_to_be32(NFSERR_NOTSUPP) 251 #define nfserr_toosmall cpu_to_be32(NFSERR_TOOSMALL) 252 #define nfserr_serverfault cpu_to_be32(NFSERR_SERVERFAULT) 253 #define nfserr_badtype cpu_to_be32(NFSERR_BADTYPE) 254 #define nfserr_jukebox cpu_to_be32(NFSERR_JUKEBOX) 255 #define nfserr_denied cpu_to_be32(NFSERR_DENIED) 256 #define nfserr_deadlock cpu_to_be32(NFSERR_DEADLOCK) 257 #define nfserr_expired cpu_to_be32(NFSERR_EXPIRED) 258 #define nfserr_bad_cookie cpu_to_be32(NFSERR_BAD_COOKIE) 259 #define nfserr_same cpu_to_be32(NFSERR_SAME) 260 #define nfserr_clid_inuse cpu_to_be32(NFSERR_CLID_INUSE) 261 #define nfserr_stale_clientid cpu_to_be32(NFSERR_STALE_CLIENTID) 262 #define nfserr_resource cpu_to_be32(NFSERR_RESOURCE) 263 #define nfserr_moved cpu_to_be32(NFSERR_MOVED) 264 #define nfserr_nofilehandle cpu_to_be32(NFSERR_NOFILEHANDLE) 265 #define nfserr_minor_vers_mismatch cpu_to_be32(NFSERR_MINOR_VERS_MISMATCH) 266 #define nfserr_share_denied cpu_to_be32(NFSERR_SHARE_DENIED) 267 #define nfserr_stale_stateid cpu_to_be32(NFSERR_STALE_STATEID) 268 #define nfserr_old_stateid cpu_to_be32(NFSERR_OLD_STATEID) 269 #define nfserr_bad_stateid cpu_to_be32(NFSERR_BAD_STATEID) 270 #define nfserr_bad_seqid cpu_to_be32(NFSERR_BAD_SEQID) 271 #define nfserr_symlink cpu_to_be32(NFSERR_SYMLINK) 272 #define nfserr_not_same cpu_to_be32(NFSERR_NOT_SAME) 273 #define nfserr_lock_range cpu_to_be32(NFSERR_LOCK_RANGE) 274 #define nfserr_restorefh cpu_to_be32(NFSERR_RESTOREFH) 275 #define nfserr_attrnotsupp cpu_to_be32(NFSERR_ATTRNOTSUPP) 276 #define nfserr_bad_xdr cpu_to_be32(NFSERR_BAD_XDR) 277 #define nfserr_openmode cpu_to_be32(NFSERR_OPENMODE) 278 #define nfserr_badowner cpu_to_be32(NFSERR_BADOWNER) 279 #define nfserr_locks_held cpu_to_be32(NFSERR_LOCKS_HELD) 280 #define nfserr_op_illegal cpu_to_be32(NFSERR_OP_ILLEGAL) 281 #define nfserr_grace cpu_to_be32(NFSERR_GRACE) 282 #define nfserr_no_grace cpu_to_be32(NFSERR_NO_GRACE) 283 #define nfserr_reclaim_bad cpu_to_be32(NFSERR_RECLAIM_BAD) 284 #define nfserr_badname cpu_to_be32(NFSERR_BADNAME) 285 #define nfserr_admin_revoked cpu_to_be32(NFS4ERR_ADMIN_REVOKED) 286 #define nfserr_cb_path_down cpu_to_be32(NFSERR_CB_PATH_DOWN) 287 #define nfserr_locked cpu_to_be32(NFSERR_LOCKED) 288 #define nfserr_wrongsec cpu_to_be32(NFSERR_WRONGSEC) 289 #define nfserr_badiomode cpu_to_be32(NFS4ERR_BADIOMODE) 290 #define nfserr_badlayout cpu_to_be32(NFS4ERR_BADLAYOUT) 291 #define nfserr_bad_session_digest cpu_to_be32(NFS4ERR_BAD_SESSION_DIGEST) 292 #define nfserr_badsession cpu_to_be32(NFS4ERR_BADSESSION) 293 #define nfserr_badslot cpu_to_be32(NFS4ERR_BADSLOT) 294 #define nfserr_complete_already cpu_to_be32(NFS4ERR_COMPLETE_ALREADY) 295 #define nfserr_conn_not_bound_to_session cpu_to_be32(NFS4ERR_CONN_NOT_BOUND_TO_SESSION) 296 #define nfserr_deleg_already_wanted cpu_to_be32(NFS4ERR_DELEG_ALREADY_WANTED) 297 #define nfserr_back_chan_busy cpu_to_be32(NFS4ERR_BACK_CHAN_BUSY) 298 #define nfserr_layouttrylater cpu_to_be32(NFS4ERR_LAYOUTTRYLATER) 299 #define nfserr_layoutunavailable cpu_to_be32(NFS4ERR_LAYOUTUNAVAILABLE) 300 #define nfserr_nomatching_layout cpu_to_be32(NFS4ERR_NOMATCHING_LAYOUT) 301 #define nfserr_recallconflict cpu_to_be32(NFS4ERR_RECALLCONFLICT) 302 #define nfserr_unknown_layouttype cpu_to_be32(NFS4ERR_UNKNOWN_LAYOUTTYPE) 303 #define nfserr_seq_misordered cpu_to_be32(NFS4ERR_SEQ_MISORDERED) 304 #define nfserr_sequence_pos cpu_to_be32(NFS4ERR_SEQUENCE_POS) 305 #define nfserr_req_too_big cpu_to_be32(NFS4ERR_REQ_TOO_BIG) 306 #define nfserr_rep_too_big cpu_to_be32(NFS4ERR_REP_TOO_BIG) 307 #define nfserr_rep_too_big_to_cache cpu_to_be32(NFS4ERR_REP_TOO_BIG_TO_CACHE) 308 #define nfserr_retry_uncached_rep cpu_to_be32(NFS4ERR_RETRY_UNCACHED_REP) 309 #define nfserr_unsafe_compound cpu_to_be32(NFS4ERR_UNSAFE_COMPOUND) 310 #define nfserr_too_many_ops cpu_to_be32(NFS4ERR_TOO_MANY_OPS) 311 #define nfserr_op_not_in_session cpu_to_be32(NFS4ERR_OP_NOT_IN_SESSION) 312 #define nfserr_hash_alg_unsupp cpu_to_be32(NFS4ERR_HASH_ALG_UNSUPP) 313 #define nfserr_clientid_busy cpu_to_be32(NFS4ERR_CLIENTID_BUSY) 314 #define nfserr_pnfs_io_hole cpu_to_be32(NFS4ERR_PNFS_IO_HOLE) 315 #define nfserr_seq_false_retry cpu_to_be32(NFS4ERR_SEQ_FALSE_RETRY) 316 #define nfserr_bad_high_slot cpu_to_be32(NFS4ERR_BAD_HIGH_SLOT) 317 #define nfserr_deadsession cpu_to_be32(NFS4ERR_DEADSESSION) 318 #define nfserr_encr_alg_unsupp cpu_to_be32(NFS4ERR_ENCR_ALG_UNSUPP) 319 #define nfserr_pnfs_no_layout cpu_to_be32(NFS4ERR_PNFS_NO_LAYOUT) 320 #define nfserr_not_only_op cpu_to_be32(NFS4ERR_NOT_ONLY_OP) 321 #define nfserr_wrong_cred cpu_to_be32(NFS4ERR_WRONG_CRED) 322 #define nfserr_wrong_type cpu_to_be32(NFS4ERR_WRONG_TYPE) 323 #define nfserr_dirdeleg_unavail cpu_to_be32(NFS4ERR_DIRDELEG_UNAVAIL) 324 #define nfserr_reject_deleg cpu_to_be32(NFS4ERR_REJECT_DELEG) 325 #define nfserr_returnconflict cpu_to_be32(NFS4ERR_RETURNCONFLICT) 326 #define nfserr_deleg_revoked cpu_to_be32(NFS4ERR_DELEG_REVOKED) 327 #define nfserr_partner_notsupp cpu_to_be32(NFS4ERR_PARTNER_NOTSUPP) 328 #define nfserr_partner_no_auth cpu_to_be32(NFS4ERR_PARTNER_NO_AUTH) 329 #define nfserr_union_notsupp cpu_to_be32(NFS4ERR_UNION_NOTSUPP) 330 #define nfserr_offload_denied cpu_to_be32(NFS4ERR_OFFLOAD_DENIED) 331 #define nfserr_wrong_lfs cpu_to_be32(NFS4ERR_WRONG_LFS) 332 #define nfserr_badlabel cpu_to_be32(NFS4ERR_BADLABEL) 333 #define nfserr_file_open cpu_to_be32(NFS4ERR_FILE_OPEN) 334 #define nfserr_xattr2big cpu_to_be32(NFS4ERR_XATTR2BIG) 335 #define nfserr_noxattr cpu_to_be32(NFS4ERR_NOXATTR) 336 337 /* 338 * Error codes for internal use. We use enum to choose numbers that are 339 * not already assigned, then covert to be32 resulting in a number that 340 * cannot conflict with any existing be32 nfserr value. 341 */ 342 enum { 343 NFSERR_DROPIT = NFS4ERR_FIRST_FREE, 344 /* if a request fails due to kmalloc failure, it gets dropped. 345 * Client should resend eventually 346 */ 347 #define nfserr_dropit cpu_to_be32(NFSERR_DROPIT) 348 349 /* end-of-file indicator in readdir */ 350 NFSERR_EOF, 351 #define nfserr_eof cpu_to_be32(NFSERR_EOF) 352 353 /* replay detected */ 354 NFSERR_REPLAY_ME, 355 #define nfserr_replay_me cpu_to_be32(NFSERR_REPLAY_ME) 356 357 /* nfs41 replay detected */ 358 NFSERR_REPLAY_CACHE, 359 #define nfserr_replay_cache cpu_to_be32(NFSERR_REPLAY_CACHE) 360 361 /* symlink found where dir expected - handled differently to 362 * other symlink found errors by NFSv3. 363 */ 364 NFSERR_SYMLINK_NOT_DIR, 365 #define nfserr_symlink_not_dir cpu_to_be32(NFSERR_SYMLINK_NOT_DIR) 366 }; 367 368 /* Check for dir entries '.' and '..' */ 369 #define isdotent(n, l) (l < 3 && n[0] == '.' && (l == 1 || n[1] == '.')) 370 371 #ifdef CONFIG_NFSD_V4 372 373 /* before processing a COMPOUND operation, we have to check that there 374 * is enough space in the buffer for XDR encode to succeed. otherwise, 375 * we might process an operation with side effects, and be unable to 376 * tell the client that the operation succeeded. 377 * 378 * COMPOUND_SLACK_SPACE - this is the minimum bytes of buffer space 379 * needed to encode an "ordinary" _successful_ operation. (GETATTR, 380 * READ, READDIR, and READLINK have their own buffer checks.) if we 381 * fall below this level, we fail the next operation with NFS4ERR_RESOURCE. 382 * 383 * COMPOUND_ERR_SLACK_SPACE - this is the minimum bytes of buffer space 384 * needed to encode an operation which has failed with NFS4ERR_RESOURCE. 385 * care is taken to ensure that we never fall below this level for any 386 * reason. 387 */ 388 #define COMPOUND_SLACK_SPACE 140 /* OP_GETFH */ 389 #define COMPOUND_ERR_SLACK_SPACE 16 /* OP_SETATTR */ 390 391 #define NFSD_LAUNDROMAT_MINTIMEOUT 1 /* seconds */ 392 #define NFSD_COURTESY_CLIENT_TIMEOUT (24 * 60 * 60) /* seconds */ 393 #define NFSD_CLIENT_MAX_TRIM_PER_RUN 128 394 #define NFS4_CLIENTS_PER_GB 1024 395 #define NFSD_DELEGRETURN_TIMEOUT (HZ / 34) /* 30ms */ 396 #define NFSD_CB_GETATTR_TIMEOUT NFSD_DELEGRETURN_TIMEOUT 397 398 /* 399 * The following attributes are currently not supported by the NFSv4 server: 400 * ARCHIVE (deprecated anyway) 401 * HIDDEN (unlikely to be supported any time soon) 402 * MIMETYPE (unlikely to be supported any time soon) 403 * QUOTA_* (will be supported in a forthcoming patch) 404 * SYSTEM (unlikely to be supported any time soon) 405 * TIME_BACKUP (unlikely to be supported any time soon) 406 * TIME_CREATE (unlikely to be supported any time soon) 407 */ 408 #define NFSD4_SUPPORTED_ATTRS_WORD0 \ 409 (FATTR4_WORD0_SUPPORTED_ATTRS | FATTR4_WORD0_TYPE | FATTR4_WORD0_FH_EXPIRE_TYPE \ 410 | FATTR4_WORD0_CHANGE | FATTR4_WORD0_SIZE | FATTR4_WORD0_LINK_SUPPORT \ 411 | FATTR4_WORD0_SYMLINK_SUPPORT | FATTR4_WORD0_NAMED_ATTR | FATTR4_WORD0_FSID \ 412 | FATTR4_WORD0_UNIQUE_HANDLES | FATTR4_WORD0_LEASE_TIME | FATTR4_WORD0_RDATTR_ERROR \ 413 | FATTR4_WORD0_ACLSUPPORT | FATTR4_WORD0_CANSETTIME | FATTR4_WORD0_CASE_INSENSITIVE \ 414 | FATTR4_WORD0_CASE_PRESERVING | FATTR4_WORD0_CHOWN_RESTRICTED \ 415 | FATTR4_WORD0_FILEHANDLE | FATTR4_WORD0_FILEID | FATTR4_WORD0_FILES_AVAIL \ 416 | FATTR4_WORD0_FILES_FREE | FATTR4_WORD0_FILES_TOTAL | FATTR4_WORD0_FS_LOCATIONS | FATTR4_WORD0_HOMOGENEOUS \ 417 | FATTR4_WORD0_MAXFILESIZE | FATTR4_WORD0_MAXLINK | FATTR4_WORD0_MAXNAME \ 418 | FATTR4_WORD0_MAXREAD | FATTR4_WORD0_MAXWRITE | FATTR4_WORD0_ACL) 419 420 #define NFSD4_SUPPORTED_ATTRS_WORD1 \ 421 (FATTR4_WORD1_MODE | FATTR4_WORD1_NO_TRUNC | FATTR4_WORD1_NUMLINKS \ 422 | FATTR4_WORD1_OWNER | FATTR4_WORD1_OWNER_GROUP | FATTR4_WORD1_RAWDEV \ 423 | FATTR4_WORD1_SPACE_AVAIL | FATTR4_WORD1_SPACE_FREE | FATTR4_WORD1_SPACE_TOTAL \ 424 | FATTR4_WORD1_SPACE_USED | FATTR4_WORD1_TIME_ACCESS | FATTR4_WORD1_TIME_ACCESS_SET \ 425 | FATTR4_WORD1_TIME_DELTA | FATTR4_WORD1_TIME_METADATA | FATTR4_WORD1_TIME_CREATE \ 426 | FATTR4_WORD1_TIME_MODIFY | FATTR4_WORD1_TIME_MODIFY_SET | FATTR4_WORD1_MOUNTED_ON_FILEID) 427 428 #define NFSD4_SUPPORTED_ATTRS_WORD2 0 429 430 /* 4.1 */ 431 #ifdef CONFIG_NFSD_PNFS 432 #define PNFSD_SUPPORTED_ATTRS_WORD1 FATTR4_WORD1_FS_LAYOUT_TYPES 433 #define PNFSD_SUPPORTED_ATTRS_WORD2 \ 434 (FATTR4_WORD2_LAYOUT_BLKSIZE | FATTR4_WORD2_LAYOUT_TYPES) 435 #else 436 #define PNFSD_SUPPORTED_ATTRS_WORD1 0 437 #define PNFSD_SUPPORTED_ATTRS_WORD2 0 438 #endif /* CONFIG_NFSD_PNFS */ 439 440 #define NFSD4_1_SUPPORTED_ATTRS_WORD0 \ 441 NFSD4_SUPPORTED_ATTRS_WORD0 442 443 #define NFSD4_1_SUPPORTED_ATTRS_WORD1 \ 444 (NFSD4_SUPPORTED_ATTRS_WORD1 | PNFSD_SUPPORTED_ATTRS_WORD1) 445 446 #define NFSD4_1_SUPPORTED_ATTRS_WORD2 \ 447 (NFSD4_SUPPORTED_ATTRS_WORD2 | PNFSD_SUPPORTED_ATTRS_WORD2 | \ 448 FATTR4_WORD2_SUPPATTR_EXCLCREAT) 449 450 /* 4.2 */ 451 #ifdef CONFIG_NFSD_V4_SECURITY_LABEL 452 #define NFSD4_2_SECURITY_ATTRS FATTR4_WORD2_SECURITY_LABEL 453 #else 454 #define NFSD4_2_SECURITY_ATTRS 0 455 #endif 456 457 #define NFSD4_2_SUPPORTED_ATTRS_WORD2 \ 458 (NFSD4_1_SUPPORTED_ATTRS_WORD2 | \ 459 FATTR4_WORD2_MODE_UMASK | \ 460 NFSD4_2_SECURITY_ATTRS | \ 461 FATTR4_WORD2_XATTR_SUPPORT) 462 463 extern const u32 nfsd_suppattrs[3][3]; 464 465 static inline __be32 nfsd4_set_netaddr(struct sockaddr *addr, 466 struct nfs42_netaddr *netaddr) 467 { 468 struct sockaddr_in *sin = (struct sockaddr_in *)addr; 469 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)addr; 470 unsigned int port; 471 size_t ret_addr, ret_port; 472 473 switch (addr->sa_family) { 474 case AF_INET: 475 port = ntohs(sin->sin_port); 476 sprintf(netaddr->netid, "tcp"); 477 netaddr->netid_len = 3; 478 break; 479 case AF_INET6: 480 port = ntohs(sin6->sin6_port); 481 sprintf(netaddr->netid, "tcp6"); 482 netaddr->netid_len = 4; 483 break; 484 default: 485 return nfserr_inval; 486 } 487 ret_addr = rpc_ntop(addr, netaddr->addr, sizeof(netaddr->addr)); 488 ret_port = snprintf(netaddr->addr + ret_addr, 489 RPCBIND_MAXUADDRLEN + 1 - ret_addr, 490 ".%u.%u", port >> 8, port & 0xff); 491 WARN_ON(ret_port >= RPCBIND_MAXUADDRLEN + 1 - ret_addr); 492 netaddr->addr_len = ret_addr + ret_port; 493 return 0; 494 } 495 496 static inline bool bmval_is_subset(const u32 *bm1, const u32 *bm2) 497 { 498 return !((bm1[0] & ~bm2[0]) || 499 (bm1[1] & ~bm2[1]) || 500 (bm1[2] & ~bm2[2])); 501 } 502 503 static inline bool nfsd_attrs_supported(u32 minorversion, const u32 *bmval) 504 { 505 return bmval_is_subset(bmval, nfsd_suppattrs[minorversion]); 506 } 507 508 /* These will return ERR_INVAL if specified in GETATTR or READDIR. */ 509 #define NFSD_WRITEONLY_ATTRS_WORD1 \ 510 (FATTR4_WORD1_TIME_ACCESS_SET | FATTR4_WORD1_TIME_MODIFY_SET) 511 512 /* 513 * These are the only attrs allowed in CREATE/OPEN/SETATTR. Don't add 514 * a writeable attribute here without also adding code to parse it to 515 * nfsd4_decode_fattr(). 516 */ 517 #define NFSD_WRITEABLE_ATTRS_WORD0 \ 518 (FATTR4_WORD0_SIZE | FATTR4_WORD0_ACL) 519 #define NFSD_WRITEABLE_ATTRS_WORD1 \ 520 (FATTR4_WORD1_MODE | FATTR4_WORD1_OWNER | FATTR4_WORD1_OWNER_GROUP \ 521 | FATTR4_WORD1_TIME_ACCESS_SET | FATTR4_WORD1_TIME_CREATE \ 522 | FATTR4_WORD1_TIME_MODIFY_SET) 523 #ifdef CONFIG_NFSD_V4_SECURITY_LABEL 524 #define MAYBE_FATTR4_WORD2_SECURITY_LABEL \ 525 FATTR4_WORD2_SECURITY_LABEL 526 #else 527 #define MAYBE_FATTR4_WORD2_SECURITY_LABEL 0 528 #endif 529 #define NFSD_WRITEABLE_ATTRS_WORD2 \ 530 (FATTR4_WORD2_MODE_UMASK \ 531 | MAYBE_FATTR4_WORD2_SECURITY_LABEL) 532 533 #define NFSD_SUPPATTR_EXCLCREAT_WORD0 \ 534 NFSD_WRITEABLE_ATTRS_WORD0 535 /* 536 * we currently store the exclusive create verifier in the v_{a,m}time 537 * attributes so the client can't set these at create time using EXCLUSIVE4_1 538 */ 539 #define NFSD_SUPPATTR_EXCLCREAT_WORD1 \ 540 (NFSD_WRITEABLE_ATTRS_WORD1 & \ 541 ~(FATTR4_WORD1_TIME_ACCESS_SET | FATTR4_WORD1_TIME_MODIFY_SET)) 542 #define NFSD_SUPPATTR_EXCLCREAT_WORD2 \ 543 NFSD_WRITEABLE_ATTRS_WORD2 544 545 extern int nfsd4_is_junction(struct dentry *dentry); 546 extern int register_cld_notifier(void); 547 extern void unregister_cld_notifier(void); 548 #ifdef CONFIG_NFSD_V4_2_INTER_SSC 549 extern void nfsd4_ssc_init_umount_work(struct nfsd_net *nn); 550 #endif 551 552 extern void nfsd4_init_leases_net(struct nfsd_net *nn); 553 554 #else /* CONFIG_NFSD_V4 */ 555 static inline int nfsd4_is_junction(struct dentry *dentry) 556 { 557 return 0; 558 } 559 560 static inline void nfsd4_init_leases_net(struct nfsd_net *nn) { }; 561 562 #define register_cld_notifier() 0 563 #define unregister_cld_notifier() do { } while(0) 564 565 #endif /* CONFIG_NFSD_V4 */ 566 567 #endif /* LINUX_NFSD_NFSD_H */ 568