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 22struct readdir_cd { 23 __be32 err; /* 0, nfserr, or nfserr_eof */ 24}; 25 26 27extern struct svc_program nfsd_program; 28extern struct svc_version nfsd_version2, nfsd_version3, 29 nfsd_version4; 30extern u32 nfsd_supported_minorversion; 31extern struct mutex nfsd_mutex; 32extern struct svc_serv *nfsd_serv; 33extern spinlock_t nfsd_drc_lock; 34extern unsigned int nfsd_drc_max_mem; 35extern unsigned int nfsd_drc_mem_used; 36 37extern const struct seq_operations nfs_exports_op; 38 39/* 40 * Function prototypes. 41 */ 42int nfsd_svc(unsigned short port, int nrservs); 43int nfsd_dispatch(struct svc_rqst *rqstp, __be32 *statp); 44 45int nfsd_nrthreads(void); 46int nfsd_nrpools(void); 47int nfsd_get_nrthreads(int n, int *); 48int 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 52extern struct svc_version nfsd_acl_version2; 53#else 54#define nfsd_acl_version2 NULL 55#endif 56#ifdef CONFIG_NFSD_V3_ACL 57extern struct svc_version nfsd_acl_version3; 58#else 59#define nfsd_acl_version3 NULL 60#endif 61#endif 62 63enum vers_op {NFSD_SET, NFSD_CLEAR, NFSD_TEST, NFSD_AVAIL }; 64int nfsd_vers(int vers, enum vers_op change); 65int nfsd_minorversion(u32 minorversion, enum vers_op change); 66void nfsd_reset_versions(void); 67int nfsd_create_serv(void); 68 69extern int nfsd_max_blksize; 70 71static 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 80extern unsigned int max_delegations; 81int nfs4_state_init(void); 82void nfsd4_free_slabs(void); 83int nfs4_state_start(void); 84void nfs4_state_shutdown(void); 85void nfs4_reset_lease(time_t leasetime); 86int nfs4_reset_recoverydir(char *recdir); 87#else 88static inline int nfs4_state_init(void) { return 0; } 89static inline void nfsd4_free_slabs(void) { } 90static inline int nfs4_state_start(void) { return 0; } 91static inline void nfs4_state_shutdown(void) { } 92static inline void nfs4_reset_lease(time_t leasetime) { } 93static inline int nfs4_reset_recoverydir(char *recdir) { return 0; } 94#endif 95 96/* 97 * lockd binding 98 */ 99void nfsd_lockd_init(void); 100void nfsd_lockd_shutdown(void); 101 102 103/* 104 * These macros provide pre-xdr'ed values for faster operation. 105 */ 106#define nfs_ok cpu_to_be32(NFS_OK) 107#define nfserr_perm cpu_to_be32(NFSERR_PERM) 108#define nfserr_noent cpu_to_be32(NFSERR_NOENT) 109#define nfserr_io cpu_to_be32(NFSERR_IO) 110#define nfserr_nxio cpu_to_be32(NFSERR_NXIO) 111#define nfserr_eagain cpu_to_be32(NFSERR_EAGAIN) 112#define nfserr_acces cpu_to_be32(NFSERR_ACCES) 113#define nfserr_exist cpu_to_be32(NFSERR_EXIST) 114#define nfserr_xdev cpu_to_be32(NFSERR_XDEV) 115#define nfserr_nodev cpu_to_be32(NFSERR_NODEV) 116#define nfserr_notdir cpu_to_be32(NFSERR_NOTDIR) 117#define nfserr_isdir cpu_to_be32(NFSERR_ISDIR) 118#define nfserr_inval cpu_to_be32(NFSERR_INVAL) 119#define nfserr_fbig cpu_to_be32(NFSERR_FBIG) 120#define nfserr_nospc cpu_to_be32(NFSERR_NOSPC) 121#define nfserr_rofs cpu_to_be32(NFSERR_ROFS) 122#define nfserr_mlink cpu_to_be32(NFSERR_MLINK) 123#define nfserr_opnotsupp cpu_to_be32(NFSERR_OPNOTSUPP) 124#define nfserr_nametoolong cpu_to_be32(NFSERR_NAMETOOLONG) 125#define nfserr_notempty cpu_to_be32(NFSERR_NOTEMPTY) 126#define nfserr_dquot cpu_to_be32(NFSERR_DQUOT) 127#define nfserr_stale cpu_to_be32(NFSERR_STALE) 128#define nfserr_remote cpu_to_be32(NFSERR_REMOTE) 129#define nfserr_wflush cpu_to_be32(NFSERR_WFLUSH) 130#define nfserr_badhandle cpu_to_be32(NFSERR_BADHANDLE) 131#define nfserr_notsync cpu_to_be32(NFSERR_NOT_SYNC) 132#define nfserr_badcookie cpu_to_be32(NFSERR_BAD_COOKIE) 133#define nfserr_notsupp cpu_to_be32(NFSERR_NOTSUPP) 134#define nfserr_toosmall cpu_to_be32(NFSERR_TOOSMALL) 135#define nfserr_serverfault cpu_to_be32(NFSERR_SERVERFAULT) 136#define nfserr_badtype cpu_to_be32(NFSERR_BADTYPE) 137#define nfserr_jukebox cpu_to_be32(NFSERR_JUKEBOX) 138#define nfserr_denied cpu_to_be32(NFSERR_DENIED) 139#define nfserr_deadlock cpu_to_be32(NFSERR_DEADLOCK) 140#define nfserr_expired cpu_to_be32(NFSERR_EXPIRED) 141#define nfserr_bad_cookie cpu_to_be32(NFSERR_BAD_COOKIE) 142#define nfserr_same cpu_to_be32(NFSERR_SAME) 143#define nfserr_clid_inuse cpu_to_be32(NFSERR_CLID_INUSE) 144#define nfserr_stale_clientid cpu_to_be32(NFSERR_STALE_CLIENTID) 145#define nfserr_resource cpu_to_be32(NFSERR_RESOURCE) 146#define nfserr_moved cpu_to_be32(NFSERR_MOVED) 147#define nfserr_nofilehandle cpu_to_be32(NFSERR_NOFILEHANDLE) 148#define nfserr_minor_vers_mismatch cpu_to_be32(NFSERR_MINOR_VERS_MISMATCH) 149#define nfserr_share_denied cpu_to_be32(NFSERR_SHARE_DENIED) 150#define nfserr_stale_stateid cpu_to_be32(NFSERR_STALE_STATEID) 151#define nfserr_old_stateid cpu_to_be32(NFSERR_OLD_STATEID) 152#define nfserr_bad_stateid cpu_to_be32(NFSERR_BAD_STATEID) 153#define nfserr_bad_seqid cpu_to_be32(NFSERR_BAD_SEQID) 154#define nfserr_symlink cpu_to_be32(NFSERR_SYMLINK) 155#define nfserr_not_same cpu_to_be32(NFSERR_NOT_SAME) 156#define nfserr_lock_range cpu_to_be32(NFSERR_LOCK_RANGE) 157#define nfserr_restorefh cpu_to_be32(NFSERR_RESTOREFH) 158#define nfserr_attrnotsupp cpu_to_be32(NFSERR_ATTRNOTSUPP) 159#define nfserr_bad_xdr cpu_to_be32(NFSERR_BAD_XDR) 160#define nfserr_openmode cpu_to_be32(NFSERR_OPENMODE) 161#define nfserr_locks_held cpu_to_be32(NFSERR_LOCKS_HELD) 162#define nfserr_op_illegal cpu_to_be32(NFSERR_OP_ILLEGAL) 163#define nfserr_grace cpu_to_be32(NFSERR_GRACE) 164#define nfserr_no_grace cpu_to_be32(NFSERR_NO_GRACE) 165#define nfserr_reclaim_bad cpu_to_be32(NFSERR_RECLAIM_BAD) 166#define nfserr_badname cpu_to_be32(NFSERR_BADNAME) 167#define nfserr_cb_path_down cpu_to_be32(NFSERR_CB_PATH_DOWN) 168#define nfserr_locked cpu_to_be32(NFSERR_LOCKED) 169#define nfserr_wrongsec cpu_to_be32(NFSERR_WRONGSEC) 170#define nfserr_badiomode cpu_to_be32(NFS4ERR_BADIOMODE) 171#define nfserr_badlayout cpu_to_be32(NFS4ERR_BADLAYOUT) 172#define nfserr_bad_session_digest cpu_to_be32(NFS4ERR_BAD_SESSION_DIGEST) 173#define nfserr_badsession cpu_to_be32(NFS4ERR_BADSESSION) 174#define nfserr_badslot cpu_to_be32(NFS4ERR_BADSLOT) 175#define nfserr_complete_already cpu_to_be32(NFS4ERR_COMPLETE_ALREADY) 176#define nfserr_conn_not_bound_to_session cpu_to_be32(NFS4ERR_CONN_NOT_BOUND_TO_SESSION) 177#define nfserr_deleg_already_wanted cpu_to_be32(NFS4ERR_DELEG_ALREADY_WANTED) 178#define nfserr_back_chan_busy cpu_to_be32(NFS4ERR_BACK_CHAN_BUSY) 179#define nfserr_layouttrylater cpu_to_be32(NFS4ERR_LAYOUTTRYLATER) 180#define nfserr_layoutunavailable cpu_to_be32(NFS4ERR_LAYOUTUNAVAILABLE) 181#define nfserr_nomatching_layout cpu_to_be32(NFS4ERR_NOMATCHING_LAYOUT) 182#define nfserr_recallconflict cpu_to_be32(NFS4ERR_RECALLCONFLICT) 183#define nfserr_unknown_layouttype cpu_to_be32(NFS4ERR_UNKNOWN_LAYOUTTYPE) 184#define nfserr_seq_misordered cpu_to_be32(NFS4ERR_SEQ_MISORDERED) 185#define nfserr_sequence_pos cpu_to_be32(NFS4ERR_SEQUENCE_POS) 186#define nfserr_req_too_big cpu_to_be32(NFS4ERR_REQ_TOO_BIG) 187#define nfserr_rep_too_big cpu_to_be32(NFS4ERR_REP_TOO_BIG) 188#define nfserr_rep_too_big_to_cache cpu_to_be32(NFS4ERR_REP_TOO_BIG_TO_CACHE) 189#define nfserr_retry_uncached_rep cpu_to_be32(NFS4ERR_RETRY_UNCACHED_REP) 190#define nfserr_unsafe_compound cpu_to_be32(NFS4ERR_UNSAFE_COMPOUND) 191#define nfserr_too_many_ops cpu_to_be32(NFS4ERR_TOO_MANY_OPS) 192#define nfserr_op_not_in_session cpu_to_be32(NFS4ERR_OP_NOT_IN_SESSION) 193#define nfserr_hash_alg_unsupp cpu_to_be32(NFS4ERR_HASH_ALG_UNSUPP) 194#define nfserr_clientid_busy cpu_to_be32(NFS4ERR_CLIENTID_BUSY) 195#define nfserr_pnfs_io_hole cpu_to_be32(NFS4ERR_PNFS_IO_HOLE) 196#define nfserr_seq_false_retry cpu_to_be32(NFS4ERR_SEQ_FALSE_RETRY) 197#define nfserr_bad_high_slot cpu_to_be32(NFS4ERR_BAD_HIGH_SLOT) 198#define nfserr_deadsession cpu_to_be32(NFS4ERR_DEADSESSION) 199#define nfserr_encr_alg_unsupp cpu_to_be32(NFS4ERR_ENCR_ALG_UNSUPP) 200#define nfserr_pnfs_no_layout cpu_to_be32(NFS4ERR_PNFS_NO_LAYOUT) 201#define nfserr_not_only_op cpu_to_be32(NFS4ERR_NOT_ONLY_OP) 202#define nfserr_wrong_cred cpu_to_be32(NFS4ERR_WRONG_CRED) 203#define nfserr_wrong_type cpu_to_be32(NFS4ERR_WRONG_TYPE) 204#define nfserr_dirdeleg_unavail cpu_to_be32(NFS4ERR_DIRDELEG_UNAVAIL) 205#define nfserr_reject_deleg cpu_to_be32(NFS4ERR_REJECT_DELEG) 206#define nfserr_returnconflict cpu_to_be32(NFS4ERR_RETURNCONFLICT) 207#define nfserr_deleg_revoked cpu_to_be32(NFS4ERR_DELEG_REVOKED) 208 209/* error codes for internal use */ 210/* if a request fails due to kmalloc failure, it gets dropped. 211 * Client should resend eventually 212 */ 213#define nfserr_dropit cpu_to_be32(30000) 214/* end-of-file indicator in readdir */ 215#define nfserr_eof cpu_to_be32(30001) 216/* replay detected */ 217#define nfserr_replay_me cpu_to_be32(11001) 218/* nfs41 replay detected */ 219#define nfserr_replay_cache cpu_to_be32(11002) 220 221/* Check for dir entries '.' and '..' */ 222#define isdotent(n, l) (l < 3 && n[0] == '.' && (l == 1 || n[1] == '.')) 223 224/* 225 * Time of server startup 226 */ 227extern struct timeval nfssvc_boot; 228 229#ifdef CONFIG_NFSD_V4 230 231extern time_t nfsd4_lease; 232extern time_t nfsd4_grace; 233 234/* before processing a COMPOUND operation, we have to check that there 235 * is enough space in the buffer for XDR encode to succeed. otherwise, 236 * we might process an operation with side effects, and be unable to 237 * tell the client that the operation succeeded. 238 * 239 * COMPOUND_SLACK_SPACE - this is the minimum bytes of buffer space 240 * needed to encode an "ordinary" _successful_ operation. (GETATTR, 241 * READ, READDIR, and READLINK have their own buffer checks.) if we 242 * fall below this level, we fail the next operation with NFS4ERR_RESOURCE. 243 * 244 * COMPOUND_ERR_SLACK_SPACE - this is the minimum bytes of buffer space 245 * needed to encode an operation which has failed with NFS4ERR_RESOURCE. 246 * care is taken to ensure that we never fall below this level for any 247 * reason. 248 */ 249#define COMPOUND_SLACK_SPACE 140 /* OP_GETFH */ 250#define COMPOUND_ERR_SLACK_SPACE 12 /* OP_SETATTR */ 251 252#define NFSD_LAUNDROMAT_MINTIMEOUT 10 /* seconds */ 253 254/* 255 * The following attributes are currently not supported by the NFSv4 server: 256 * ARCHIVE (deprecated anyway) 257 * HIDDEN (unlikely to be supported any time soon) 258 * MIMETYPE (unlikely to be supported any time soon) 259 * QUOTA_* (will be supported in a forthcoming patch) 260 * SYSTEM (unlikely to be supported any time soon) 261 * TIME_BACKUP (unlikely to be supported any time soon) 262 * TIME_CREATE (unlikely to be supported any time soon) 263 */ 264#define NFSD4_SUPPORTED_ATTRS_WORD0 \ 265(FATTR4_WORD0_SUPPORTED_ATTRS | FATTR4_WORD0_TYPE | FATTR4_WORD0_FH_EXPIRE_TYPE \ 266 | FATTR4_WORD0_CHANGE | FATTR4_WORD0_SIZE | FATTR4_WORD0_LINK_SUPPORT \ 267 | FATTR4_WORD0_SYMLINK_SUPPORT | FATTR4_WORD0_NAMED_ATTR | FATTR4_WORD0_FSID \ 268 | FATTR4_WORD0_UNIQUE_HANDLES | FATTR4_WORD0_LEASE_TIME | FATTR4_WORD0_RDATTR_ERROR \ 269 | FATTR4_WORD0_ACLSUPPORT | FATTR4_WORD0_CANSETTIME | FATTR4_WORD0_CASE_INSENSITIVE \ 270 | FATTR4_WORD0_CASE_PRESERVING | FATTR4_WORD0_CHOWN_RESTRICTED \ 271 | FATTR4_WORD0_FILEHANDLE | FATTR4_WORD0_FILEID | FATTR4_WORD0_FILES_AVAIL \ 272 | FATTR4_WORD0_FILES_FREE | FATTR4_WORD0_FILES_TOTAL | FATTR4_WORD0_FS_LOCATIONS | FATTR4_WORD0_HOMOGENEOUS \ 273 | FATTR4_WORD0_MAXFILESIZE | FATTR4_WORD0_MAXLINK | FATTR4_WORD0_MAXNAME \ 274 | FATTR4_WORD0_MAXREAD | FATTR4_WORD0_MAXWRITE | FATTR4_WORD0_ACL) 275 276#define NFSD4_SUPPORTED_ATTRS_WORD1 \ 277(FATTR4_WORD1_MODE | FATTR4_WORD1_NO_TRUNC | FATTR4_WORD1_NUMLINKS \ 278 | FATTR4_WORD1_OWNER | FATTR4_WORD1_OWNER_GROUP | FATTR4_WORD1_RAWDEV \ 279 | FATTR4_WORD1_SPACE_AVAIL | FATTR4_WORD1_SPACE_FREE | FATTR4_WORD1_SPACE_TOTAL \ 280 | FATTR4_WORD1_SPACE_USED | FATTR4_WORD1_TIME_ACCESS | FATTR4_WORD1_TIME_ACCESS_SET \ 281 | FATTR4_WORD1_TIME_DELTA | FATTR4_WORD1_TIME_METADATA \ 282 | FATTR4_WORD1_TIME_MODIFY | FATTR4_WORD1_TIME_MODIFY_SET | FATTR4_WORD1_MOUNTED_ON_FILEID) 283 284#define NFSD4_SUPPORTED_ATTRS_WORD2 0 285 286#define NFSD4_1_SUPPORTED_ATTRS_WORD0 \ 287 NFSD4_SUPPORTED_ATTRS_WORD0 288 289#define NFSD4_1_SUPPORTED_ATTRS_WORD1 \ 290 NFSD4_SUPPORTED_ATTRS_WORD1 291 292#define NFSD4_1_SUPPORTED_ATTRS_WORD2 \ 293 (NFSD4_SUPPORTED_ATTRS_WORD2 | FATTR4_WORD2_SUPPATTR_EXCLCREAT) 294 295static inline u32 nfsd_suppattrs0(u32 minorversion) 296{ 297 return minorversion ? NFSD4_1_SUPPORTED_ATTRS_WORD0 298 : NFSD4_SUPPORTED_ATTRS_WORD0; 299} 300 301static inline u32 nfsd_suppattrs1(u32 minorversion) 302{ 303 return minorversion ? NFSD4_1_SUPPORTED_ATTRS_WORD1 304 : NFSD4_SUPPORTED_ATTRS_WORD1; 305} 306 307static inline u32 nfsd_suppattrs2(u32 minorversion) 308{ 309 return minorversion ? NFSD4_1_SUPPORTED_ATTRS_WORD2 310 : NFSD4_SUPPORTED_ATTRS_WORD2; 311} 312 313/* These will return ERR_INVAL if specified in GETATTR or READDIR. */ 314#define NFSD_WRITEONLY_ATTRS_WORD1 \ 315(FATTR4_WORD1_TIME_ACCESS_SET | FATTR4_WORD1_TIME_MODIFY_SET) 316 317/* These are the only attrs allowed in CREATE/OPEN/SETATTR. */ 318#define NFSD_WRITEABLE_ATTRS_WORD0 \ 319(FATTR4_WORD0_SIZE | FATTR4_WORD0_ACL ) 320#define NFSD_WRITEABLE_ATTRS_WORD1 \ 321(FATTR4_WORD1_MODE | FATTR4_WORD1_OWNER | FATTR4_WORD1_OWNER_GROUP \ 322 | FATTR4_WORD1_TIME_ACCESS_SET | FATTR4_WORD1_TIME_MODIFY_SET) 323#define NFSD_WRITEABLE_ATTRS_WORD2 0 324 325#define NFSD_SUPPATTR_EXCLCREAT_WORD0 \ 326 NFSD_WRITEABLE_ATTRS_WORD0 327/* 328 * we currently store the exclusive create verifier in the v_{a,m}time 329 * attributes so the client can't set these at create time using EXCLUSIVE4_1 330 */ 331#define NFSD_SUPPATTR_EXCLCREAT_WORD1 \ 332 (NFSD_WRITEABLE_ATTRS_WORD1 & \ 333 ~(FATTR4_WORD1_TIME_ACCESS_SET | FATTR4_WORD1_TIME_MODIFY_SET)) 334#define NFSD_SUPPATTR_EXCLCREAT_WORD2 \ 335 NFSD_WRITEABLE_ATTRS_WORD2 336 337#endif /* CONFIG_NFSD_V4 */ 338 339#endif /* LINUX_NFSD_NFSD_H */ 340