1 /* 2 * Hodge-podge collection of knfsd-related stuff. 3 * I will sort this out later. 4 * 5 * Copyright (C) 1995-1997 Olaf Kirch <okir@monad.swb.de> 6 */ 7 8 #ifndef LINUX_NFSD_NFSD_H 9 #define LINUX_NFSD_NFSD_H 10 11 #include <linux/types.h> 12 #include <linux/mount.h> 13 14 #include <linux/nfsd/debug.h> 15 #include <linux/nfsd/export.h> 16 #include <linux/nfsd/stats.h> 17 /* 18 * nfsd version 19 */ 20 #define NFSD_SUPPORTED_MINOR_VERSION 1 21 22 struct readdir_cd { 23 __be32 err; /* 0, nfserr, or nfserr_eof */ 24 }; 25 26 27 extern struct svc_program nfsd_program; 28 extern struct svc_version nfsd_version2, nfsd_version3, 29 nfsd_version4; 30 extern u32 nfsd_supported_minorversion; 31 extern struct mutex nfsd_mutex; 32 extern struct svc_serv *nfsd_serv; 33 extern spinlock_t nfsd_drc_lock; 34 extern unsigned int nfsd_drc_max_mem; 35 extern unsigned int nfsd_drc_mem_used; 36 37 extern const struct seq_operations nfs_exports_op; 38 39 /* 40 * Function prototypes. 41 */ 42 int nfsd_svc(unsigned short port, int nrservs); 43 int nfsd_dispatch(struct svc_rqst *rqstp, __be32 *statp); 44 45 int nfsd_nrthreads(void); 46 int nfsd_nrpools(void); 47 int nfsd_get_nrthreads(int n, int *); 48 int nfsd_set_nrthreads(int n, int *); 49 50 #if defined(CONFIG_NFSD_V2_ACL) || defined(CONFIG_NFSD_V3_ACL) 51 #ifdef CONFIG_NFSD_V2_ACL 52 extern struct svc_version nfsd_acl_version2; 53 #else 54 #define nfsd_acl_version2 NULL 55 #endif 56 #ifdef CONFIG_NFSD_V3_ACL 57 extern struct svc_version nfsd_acl_version3; 58 #else 59 #define nfsd_acl_version3 NULL 60 #endif 61 #endif 62 63 enum vers_op {NFSD_SET, NFSD_CLEAR, NFSD_TEST, NFSD_AVAIL }; 64 int nfsd_vers(int vers, enum vers_op change); 65 int nfsd_minorversion(u32 minorversion, enum vers_op change); 66 void nfsd_reset_versions(void); 67 int nfsd_create_serv(void); 68 69 extern int nfsd_max_blksize; 70 71 static inline int nfsd_v4client(struct svc_rqst *rq) 72 { 73 return rq->rq_prog == NFS_PROGRAM && rq->rq_vers == 4; 74 } 75 76 /* 77 * NFSv4 State 78 */ 79 #ifdef CONFIG_NFSD_V4 80 extern unsigned int max_delegations; 81 int nfs4_state_init(void); 82 void nfsd4_free_slabs(void); 83 int nfs4_state_start(void); 84 void nfs4_state_shutdown(void); 85 time_t nfs4_lease_time(void); 86 void nfs4_reset_lease(time_t leasetime); 87 int nfs4_reset_recoverydir(char *recdir); 88 #else 89 static inline int nfs4_state_init(void) { return 0; } 90 static inline void nfsd4_free_slabs(void) { } 91 static inline int nfs4_state_start(void) { return 0; } 92 static inline void nfs4_state_shutdown(void) { } 93 static inline time_t nfs4_lease_time(void) { return 0; } 94 static inline void nfs4_reset_lease(time_t leasetime) { } 95 static inline int nfs4_reset_recoverydir(char *recdir) { return 0; } 96 #endif 97 98 /* 99 * lockd binding 100 */ 101 void nfsd_lockd_init(void); 102 void nfsd_lockd_shutdown(void); 103 104 105 /* 106 * These macros provide pre-xdr'ed values for faster operation. 107 */ 108 #define nfs_ok cpu_to_be32(NFS_OK) 109 #define nfserr_perm cpu_to_be32(NFSERR_PERM) 110 #define nfserr_noent cpu_to_be32(NFSERR_NOENT) 111 #define nfserr_io cpu_to_be32(NFSERR_IO) 112 #define nfserr_nxio cpu_to_be32(NFSERR_NXIO) 113 #define nfserr_eagain cpu_to_be32(NFSERR_EAGAIN) 114 #define nfserr_acces cpu_to_be32(NFSERR_ACCES) 115 #define nfserr_exist cpu_to_be32(NFSERR_EXIST) 116 #define nfserr_xdev cpu_to_be32(NFSERR_XDEV) 117 #define nfserr_nodev cpu_to_be32(NFSERR_NODEV) 118 #define nfserr_notdir cpu_to_be32(NFSERR_NOTDIR) 119 #define nfserr_isdir cpu_to_be32(NFSERR_ISDIR) 120 #define nfserr_inval cpu_to_be32(NFSERR_INVAL) 121 #define nfserr_fbig cpu_to_be32(NFSERR_FBIG) 122 #define nfserr_nospc cpu_to_be32(NFSERR_NOSPC) 123 #define nfserr_rofs cpu_to_be32(NFSERR_ROFS) 124 #define nfserr_mlink cpu_to_be32(NFSERR_MLINK) 125 #define nfserr_opnotsupp cpu_to_be32(NFSERR_OPNOTSUPP) 126 #define nfserr_nametoolong cpu_to_be32(NFSERR_NAMETOOLONG) 127 #define nfserr_notempty cpu_to_be32(NFSERR_NOTEMPTY) 128 #define nfserr_dquot cpu_to_be32(NFSERR_DQUOT) 129 #define nfserr_stale cpu_to_be32(NFSERR_STALE) 130 #define nfserr_remote cpu_to_be32(NFSERR_REMOTE) 131 #define nfserr_wflush cpu_to_be32(NFSERR_WFLUSH) 132 #define nfserr_badhandle cpu_to_be32(NFSERR_BADHANDLE) 133 #define nfserr_notsync cpu_to_be32(NFSERR_NOT_SYNC) 134 #define nfserr_badcookie cpu_to_be32(NFSERR_BAD_COOKIE) 135 #define nfserr_notsupp cpu_to_be32(NFSERR_NOTSUPP) 136 #define nfserr_toosmall cpu_to_be32(NFSERR_TOOSMALL) 137 #define nfserr_serverfault cpu_to_be32(NFSERR_SERVERFAULT) 138 #define nfserr_badtype cpu_to_be32(NFSERR_BADTYPE) 139 #define nfserr_jukebox cpu_to_be32(NFSERR_JUKEBOX) 140 #define nfserr_denied cpu_to_be32(NFSERR_DENIED) 141 #define nfserr_deadlock cpu_to_be32(NFSERR_DEADLOCK) 142 #define nfserr_expired cpu_to_be32(NFSERR_EXPIRED) 143 #define nfserr_bad_cookie cpu_to_be32(NFSERR_BAD_COOKIE) 144 #define nfserr_same cpu_to_be32(NFSERR_SAME) 145 #define nfserr_clid_inuse cpu_to_be32(NFSERR_CLID_INUSE) 146 #define nfserr_stale_clientid cpu_to_be32(NFSERR_STALE_CLIENTID) 147 #define nfserr_resource cpu_to_be32(NFSERR_RESOURCE) 148 #define nfserr_moved cpu_to_be32(NFSERR_MOVED) 149 #define nfserr_nofilehandle cpu_to_be32(NFSERR_NOFILEHANDLE) 150 #define nfserr_minor_vers_mismatch cpu_to_be32(NFSERR_MINOR_VERS_MISMATCH) 151 #define nfserr_share_denied cpu_to_be32(NFSERR_SHARE_DENIED) 152 #define nfserr_stale_stateid cpu_to_be32(NFSERR_STALE_STATEID) 153 #define nfserr_old_stateid cpu_to_be32(NFSERR_OLD_STATEID) 154 #define nfserr_bad_stateid cpu_to_be32(NFSERR_BAD_STATEID) 155 #define nfserr_bad_seqid cpu_to_be32(NFSERR_BAD_SEQID) 156 #define nfserr_symlink cpu_to_be32(NFSERR_SYMLINK) 157 #define nfserr_not_same cpu_to_be32(NFSERR_NOT_SAME) 158 #define nfserr_restorefh cpu_to_be32(NFSERR_RESTOREFH) 159 #define nfserr_attrnotsupp cpu_to_be32(NFSERR_ATTRNOTSUPP) 160 #define nfserr_bad_xdr cpu_to_be32(NFSERR_BAD_XDR) 161 #define nfserr_openmode cpu_to_be32(NFSERR_OPENMODE) 162 #define nfserr_locks_held cpu_to_be32(NFSERR_LOCKS_HELD) 163 #define nfserr_op_illegal cpu_to_be32(NFSERR_OP_ILLEGAL) 164 #define nfserr_grace cpu_to_be32(NFSERR_GRACE) 165 #define nfserr_no_grace cpu_to_be32(NFSERR_NO_GRACE) 166 #define nfserr_reclaim_bad cpu_to_be32(NFSERR_RECLAIM_BAD) 167 #define nfserr_badname cpu_to_be32(NFSERR_BADNAME) 168 #define nfserr_cb_path_down cpu_to_be32(NFSERR_CB_PATH_DOWN) 169 #define nfserr_locked cpu_to_be32(NFSERR_LOCKED) 170 #define nfserr_wrongsec cpu_to_be32(NFSERR_WRONGSEC) 171 #define nfserr_badiomode cpu_to_be32(NFS4ERR_BADIOMODE) 172 #define nfserr_badlayout cpu_to_be32(NFS4ERR_BADLAYOUT) 173 #define nfserr_bad_session_digest cpu_to_be32(NFS4ERR_BAD_SESSION_DIGEST) 174 #define nfserr_badsession cpu_to_be32(NFS4ERR_BADSESSION) 175 #define nfserr_badslot cpu_to_be32(NFS4ERR_BADSLOT) 176 #define nfserr_complete_already cpu_to_be32(NFS4ERR_COMPLETE_ALREADY) 177 #define nfserr_conn_not_bound_to_session cpu_to_be32(NFS4ERR_CONN_NOT_BOUND_TO_SESSION) 178 #define nfserr_deleg_already_wanted cpu_to_be32(NFS4ERR_DELEG_ALREADY_WANTED) 179 #define nfserr_back_chan_busy cpu_to_be32(NFS4ERR_BACK_CHAN_BUSY) 180 #define nfserr_layouttrylater cpu_to_be32(NFS4ERR_LAYOUTTRYLATER) 181 #define nfserr_layoutunavailable cpu_to_be32(NFS4ERR_LAYOUTUNAVAILABLE) 182 #define nfserr_nomatching_layout cpu_to_be32(NFS4ERR_NOMATCHING_LAYOUT) 183 #define nfserr_recallconflict cpu_to_be32(NFS4ERR_RECALLCONFLICT) 184 #define nfserr_unknown_layouttype cpu_to_be32(NFS4ERR_UNKNOWN_LAYOUTTYPE) 185 #define nfserr_seq_misordered cpu_to_be32(NFS4ERR_SEQ_MISORDERED) 186 #define nfserr_sequence_pos cpu_to_be32(NFS4ERR_SEQUENCE_POS) 187 #define nfserr_req_too_big cpu_to_be32(NFS4ERR_REQ_TOO_BIG) 188 #define nfserr_rep_too_big cpu_to_be32(NFS4ERR_REP_TOO_BIG) 189 #define nfserr_rep_too_big_to_cache cpu_to_be32(NFS4ERR_REP_TOO_BIG_TO_CACHE) 190 #define nfserr_retry_uncached_rep cpu_to_be32(NFS4ERR_RETRY_UNCACHED_REP) 191 #define nfserr_unsafe_compound cpu_to_be32(NFS4ERR_UNSAFE_COMPOUND) 192 #define nfserr_too_many_ops cpu_to_be32(NFS4ERR_TOO_MANY_OPS) 193 #define nfserr_op_not_in_session cpu_to_be32(NFS4ERR_OP_NOT_IN_SESSION) 194 #define nfserr_hash_alg_unsupp cpu_to_be32(NFS4ERR_HASH_ALG_UNSUPP) 195 #define nfserr_clientid_busy cpu_to_be32(NFS4ERR_CLIENTID_BUSY) 196 #define nfserr_pnfs_io_hole cpu_to_be32(NFS4ERR_PNFS_IO_HOLE) 197 #define nfserr_seq_false_retry cpu_to_be32(NFS4ERR_SEQ_FALSE_RETRY) 198 #define nfserr_bad_high_slot cpu_to_be32(NFS4ERR_BAD_HIGH_SLOT) 199 #define nfserr_deadsession cpu_to_be32(NFS4ERR_DEADSESSION) 200 #define nfserr_encr_alg_unsupp cpu_to_be32(NFS4ERR_ENCR_ALG_UNSUPP) 201 #define nfserr_pnfs_no_layout cpu_to_be32(NFS4ERR_PNFS_NO_LAYOUT) 202 #define nfserr_not_only_op cpu_to_be32(NFS4ERR_NOT_ONLY_OP) 203 #define nfserr_wrong_cred cpu_to_be32(NFS4ERR_WRONG_CRED) 204 #define nfserr_wrong_type cpu_to_be32(NFS4ERR_WRONG_TYPE) 205 #define nfserr_dirdeleg_unavail cpu_to_be32(NFS4ERR_DIRDELEG_UNAVAIL) 206 #define nfserr_reject_deleg cpu_to_be32(NFS4ERR_REJECT_DELEG) 207 #define nfserr_returnconflict cpu_to_be32(NFS4ERR_RETURNCONFLICT) 208 #define nfserr_deleg_revoked cpu_to_be32(NFS4ERR_DELEG_REVOKED) 209 210 /* error codes for internal use */ 211 /* if a request fails due to kmalloc failure, it gets dropped. 212 * Client should resend eventually 213 */ 214 #define nfserr_dropit cpu_to_be32(30000) 215 /* end-of-file indicator in readdir */ 216 #define nfserr_eof cpu_to_be32(30001) 217 /* replay detected */ 218 #define nfserr_replay_me cpu_to_be32(11001) 219 /* nfs41 replay detected */ 220 #define nfserr_replay_cache cpu_to_be32(11002) 221 222 /* Check for dir entries '.' and '..' */ 223 #define isdotent(n, l) (l < 3 && n[0] == '.' && (l == 1 || n[1] == '.')) 224 225 /* 226 * Time of server startup 227 */ 228 extern struct timeval nfssvc_boot; 229 230 #ifdef CONFIG_NFSD_V4 231 232 /* before processing a COMPOUND operation, we have to check that there 233 * is enough space in the buffer for XDR encode to succeed. otherwise, 234 * we might process an operation with side effects, and be unable to 235 * tell the client that the operation succeeded. 236 * 237 * COMPOUND_SLACK_SPACE - this is the minimum bytes of buffer space 238 * needed to encode an "ordinary" _successful_ operation. (GETATTR, 239 * READ, READDIR, and READLINK have their own buffer checks.) if we 240 * fall below this level, we fail the next operation with NFS4ERR_RESOURCE. 241 * 242 * COMPOUND_ERR_SLACK_SPACE - this is the minimum bytes of buffer space 243 * needed to encode an operation which has failed with NFS4ERR_RESOURCE. 244 * care is taken to ensure that we never fall below this level for any 245 * reason. 246 */ 247 #define COMPOUND_SLACK_SPACE 140 /* OP_GETFH */ 248 #define COMPOUND_ERR_SLACK_SPACE 12 /* OP_SETATTR */ 249 250 #define NFSD_LEASE_TIME (nfs4_lease_time()) 251 #define NFSD_LAUNDROMAT_MINTIMEOUT 10 /* seconds */ 252 253 /* 254 * The following attributes are currently not supported by the NFSv4 server: 255 * ARCHIVE (deprecated anyway) 256 * HIDDEN (unlikely to be supported any time soon) 257 * MIMETYPE (unlikely to be supported any time soon) 258 * QUOTA_* (will be supported in a forthcoming patch) 259 * SYSTEM (unlikely to be supported any time soon) 260 * TIME_BACKUP (unlikely to be supported any time soon) 261 * TIME_CREATE (unlikely to be supported any time soon) 262 */ 263 #define NFSD4_SUPPORTED_ATTRS_WORD0 \ 264 (FATTR4_WORD0_SUPPORTED_ATTRS | FATTR4_WORD0_TYPE | FATTR4_WORD0_FH_EXPIRE_TYPE \ 265 | FATTR4_WORD0_CHANGE | FATTR4_WORD0_SIZE | FATTR4_WORD0_LINK_SUPPORT \ 266 | FATTR4_WORD0_SYMLINK_SUPPORT | FATTR4_WORD0_NAMED_ATTR | FATTR4_WORD0_FSID \ 267 | FATTR4_WORD0_UNIQUE_HANDLES | FATTR4_WORD0_LEASE_TIME | FATTR4_WORD0_RDATTR_ERROR \ 268 | FATTR4_WORD0_ACLSUPPORT | FATTR4_WORD0_CANSETTIME | FATTR4_WORD0_CASE_INSENSITIVE \ 269 | FATTR4_WORD0_CASE_PRESERVING | FATTR4_WORD0_CHOWN_RESTRICTED \ 270 | FATTR4_WORD0_FILEHANDLE | FATTR4_WORD0_FILEID | FATTR4_WORD0_FILES_AVAIL \ 271 | FATTR4_WORD0_FILES_FREE | FATTR4_WORD0_FILES_TOTAL | FATTR4_WORD0_FS_LOCATIONS | FATTR4_WORD0_HOMOGENEOUS \ 272 | FATTR4_WORD0_MAXFILESIZE | FATTR4_WORD0_MAXLINK | FATTR4_WORD0_MAXNAME \ 273 | FATTR4_WORD0_MAXREAD | FATTR4_WORD0_MAXWRITE | FATTR4_WORD0_ACL) 274 275 #define NFSD4_SUPPORTED_ATTRS_WORD1 \ 276 (FATTR4_WORD1_MODE | FATTR4_WORD1_NO_TRUNC | FATTR4_WORD1_NUMLINKS \ 277 | FATTR4_WORD1_OWNER | FATTR4_WORD1_OWNER_GROUP | FATTR4_WORD1_RAWDEV \ 278 | FATTR4_WORD1_SPACE_AVAIL | FATTR4_WORD1_SPACE_FREE | FATTR4_WORD1_SPACE_TOTAL \ 279 | FATTR4_WORD1_SPACE_USED | FATTR4_WORD1_TIME_ACCESS | FATTR4_WORD1_TIME_ACCESS_SET \ 280 | FATTR4_WORD1_TIME_DELTA | FATTR4_WORD1_TIME_METADATA \ 281 | FATTR4_WORD1_TIME_MODIFY | FATTR4_WORD1_TIME_MODIFY_SET | FATTR4_WORD1_MOUNTED_ON_FILEID) 282 283 #define NFSD4_SUPPORTED_ATTRS_WORD2 0 284 285 #define NFSD4_1_SUPPORTED_ATTRS_WORD0 \ 286 NFSD4_SUPPORTED_ATTRS_WORD0 287 288 #define NFSD4_1_SUPPORTED_ATTRS_WORD1 \ 289 NFSD4_SUPPORTED_ATTRS_WORD1 290 291 #define NFSD4_1_SUPPORTED_ATTRS_WORD2 \ 292 (NFSD4_SUPPORTED_ATTRS_WORD2 | FATTR4_WORD2_SUPPATTR_EXCLCREAT) 293 294 static inline u32 nfsd_suppattrs0(u32 minorversion) 295 { 296 return minorversion ? NFSD4_1_SUPPORTED_ATTRS_WORD0 297 : NFSD4_SUPPORTED_ATTRS_WORD0; 298 } 299 300 static inline u32 nfsd_suppattrs1(u32 minorversion) 301 { 302 return minorversion ? NFSD4_1_SUPPORTED_ATTRS_WORD1 303 : NFSD4_SUPPORTED_ATTRS_WORD1; 304 } 305 306 static inline u32 nfsd_suppattrs2(u32 minorversion) 307 { 308 return minorversion ? NFSD4_1_SUPPORTED_ATTRS_WORD2 309 : NFSD4_SUPPORTED_ATTRS_WORD2; 310 } 311 312 /* These will return ERR_INVAL if specified in GETATTR or READDIR. */ 313 #define NFSD_WRITEONLY_ATTRS_WORD1 \ 314 (FATTR4_WORD1_TIME_ACCESS_SET | FATTR4_WORD1_TIME_MODIFY_SET) 315 316 /* These are the only attrs allowed in CREATE/OPEN/SETATTR. */ 317 #define NFSD_WRITEABLE_ATTRS_WORD0 \ 318 (FATTR4_WORD0_SIZE | FATTR4_WORD0_ACL ) 319 #define NFSD_WRITEABLE_ATTRS_WORD1 \ 320 (FATTR4_WORD1_MODE | FATTR4_WORD1_OWNER | FATTR4_WORD1_OWNER_GROUP \ 321 | FATTR4_WORD1_TIME_ACCESS_SET | FATTR4_WORD1_TIME_MODIFY_SET) 322 #define NFSD_WRITEABLE_ATTRS_WORD2 0 323 324 #define NFSD_SUPPATTR_EXCLCREAT_WORD0 \ 325 NFSD_WRITEABLE_ATTRS_WORD0 326 /* 327 * we currently store the exclusive create verifier in the v_{a,m}time 328 * attributes so the client can't set these at create time using EXCLUSIVE4_1 329 */ 330 #define NFSD_SUPPATTR_EXCLCREAT_WORD1 \ 331 (NFSD_WRITEABLE_ATTRS_WORD1 & \ 332 ~(FATTR4_WORD1_TIME_ACCESS_SET | FATTR4_WORD1_TIME_MODIFY_SET)) 333 #define NFSD_SUPPATTR_EXCLCREAT_WORD2 \ 334 NFSD_WRITEABLE_ATTRS_WORD2 335 336 #endif /* CONFIG_NFSD_V4 */ 337 338 #endif /* LINUX_NFSD_NFSD_H */ 339