Merge branch 'akpm'
[linux-2.6/next.git] / fs / nfsd / nfsd.h
blob8da03e16ab3508cb338b14183a3ce16b7685b062
1 /*
2 * Hodge-podge collection of knfsd-related stuff.
3 * I will sort this out later.
5 * Copyright (C) 1995-1997 Olaf Kirch <okir@monad.swb.de>
6 */
8 #ifndef LINUX_NFSD_NFSD_H
9 #define LINUX_NFSD_NFSD_H
11 #include <linux/types.h>
12 #include <linux/mount.h>
14 #include <linux/nfs.h>
15 #include <linux/nfs2.h>
16 #include <linux/nfs3.h>
17 #include <linux/nfs4.h>
18 #include <linux/sunrpc/msg_prot.h>
20 #include <linux/nfsd/debug.h>
21 #include <linux/nfsd/export.h>
22 #include <linux/nfsd/stats.h>
25 * nfsd version
27 #define NFSD_SUPPORTED_MINOR_VERSION 1
29 * Maximum blocksizes supported by daemon under various circumstances.
31 #define NFSSVC_MAXBLKSIZE RPCSVC_MAXPAYLOAD
32 /* NFSv2 is limited by the protocol specification, see RFC 1094 */
33 #define NFSSVC_MAXBLKSIZE_V2 (8*1024)
37 * Largest number of bytes we need to allocate for an NFS
38 * call or reply. Used to control buffer sizes. We use
39 * the length of v3 WRITE, READDIR and READDIR replies
40 * which are an RPC header, up to 26 XDR units of reply
41 * data, and some page data.
43 * Note that accuracy here doesn't matter too much as the
44 * size is rounded up to a page size when allocating space.
46 #define NFSD_BUFSIZE ((RPC_MAX_HEADER_WITH_AUTH+26)*XDR_UNIT + NFSSVC_MAXBLKSIZE)
48 struct readdir_cd {
49 __be32 err; /* 0, nfserr, or nfserr_eof */
53 extern struct svc_program nfsd_program;
54 extern struct svc_version nfsd_version2, nfsd_version3,
55 nfsd_version4;
56 extern u32 nfsd_supported_minorversion;
57 extern struct mutex nfsd_mutex;
58 extern struct svc_serv *nfsd_serv;
59 extern spinlock_t nfsd_drc_lock;
60 extern unsigned int nfsd_drc_max_mem;
61 extern unsigned int nfsd_drc_mem_used;
63 extern const struct seq_operations nfs_exports_op;
66 * Function prototypes.
68 int nfsd_svc(unsigned short port, int nrservs);
69 int nfsd_dispatch(struct svc_rqst *rqstp, __be32 *statp);
71 int nfsd_nrthreads(void);
72 int nfsd_nrpools(void);
73 int nfsd_get_nrthreads(int n, int *);
74 int nfsd_set_nrthreads(int n, int *);
76 #if defined(CONFIG_NFSD_V2_ACL) || defined(CONFIG_NFSD_V3_ACL)
77 #ifdef CONFIG_NFSD_V2_ACL
78 extern struct svc_version nfsd_acl_version2;
79 #else
80 #define nfsd_acl_version2 NULL
81 #endif
82 #ifdef CONFIG_NFSD_V3_ACL
83 extern struct svc_version nfsd_acl_version3;
84 #else
85 #define nfsd_acl_version3 NULL
86 #endif
87 #endif
89 enum vers_op {NFSD_SET, NFSD_CLEAR, NFSD_TEST, NFSD_AVAIL };
90 int nfsd_vers(int vers, enum vers_op change);
91 int nfsd_minorversion(u32 minorversion, enum vers_op change);
92 void nfsd_reset_versions(void);
93 int nfsd_create_serv(void);
95 extern int nfsd_max_blksize;
97 static inline int nfsd_v4client(struct svc_rqst *rq)
99 return rq->rq_prog == NFS_PROGRAM && rq->rq_vers == 4;
103 * NFSv4 State
105 #ifdef CONFIG_NFSD_V4
106 extern unsigned int max_delegations;
107 int nfs4_state_init(void);
108 void nfsd4_free_slabs(void);
109 int nfs4_state_start(void);
110 void nfs4_state_shutdown(void);
111 void nfs4_reset_lease(time_t leasetime);
112 int nfs4_reset_recoverydir(char *recdir);
113 #else
114 static inline int nfs4_state_init(void) { return 0; }
115 static inline void nfsd4_free_slabs(void) { }
116 static inline int nfs4_state_start(void) { return 0; }
117 static inline void nfs4_state_shutdown(void) { }
118 static inline void nfs4_reset_lease(time_t leasetime) { }
119 static inline int nfs4_reset_recoverydir(char *recdir) { return 0; }
120 #endif
123 * lockd binding
125 void nfsd_lockd_init(void);
126 void nfsd_lockd_shutdown(void);
130 * These macros provide pre-xdr'ed values for faster operation.
132 #define nfs_ok cpu_to_be32(NFS_OK)
133 #define nfserr_perm cpu_to_be32(NFSERR_PERM)
134 #define nfserr_noent cpu_to_be32(NFSERR_NOENT)
135 #define nfserr_io cpu_to_be32(NFSERR_IO)
136 #define nfserr_nxio cpu_to_be32(NFSERR_NXIO)
137 #define nfserr_eagain cpu_to_be32(NFSERR_EAGAIN)
138 #define nfserr_acces cpu_to_be32(NFSERR_ACCES)
139 #define nfserr_exist cpu_to_be32(NFSERR_EXIST)
140 #define nfserr_xdev cpu_to_be32(NFSERR_XDEV)
141 #define nfserr_nodev cpu_to_be32(NFSERR_NODEV)
142 #define nfserr_notdir cpu_to_be32(NFSERR_NOTDIR)
143 #define nfserr_isdir cpu_to_be32(NFSERR_ISDIR)
144 #define nfserr_inval cpu_to_be32(NFSERR_INVAL)
145 #define nfserr_fbig cpu_to_be32(NFSERR_FBIG)
146 #define nfserr_nospc cpu_to_be32(NFSERR_NOSPC)
147 #define nfserr_rofs cpu_to_be32(NFSERR_ROFS)
148 #define nfserr_mlink cpu_to_be32(NFSERR_MLINK)
149 #define nfserr_opnotsupp cpu_to_be32(NFSERR_OPNOTSUPP)
150 #define nfserr_nametoolong cpu_to_be32(NFSERR_NAMETOOLONG)
151 #define nfserr_notempty cpu_to_be32(NFSERR_NOTEMPTY)
152 #define nfserr_dquot cpu_to_be32(NFSERR_DQUOT)
153 #define nfserr_stale cpu_to_be32(NFSERR_STALE)
154 #define nfserr_remote cpu_to_be32(NFSERR_REMOTE)
155 #define nfserr_wflush cpu_to_be32(NFSERR_WFLUSH)
156 #define nfserr_badhandle cpu_to_be32(NFSERR_BADHANDLE)
157 #define nfserr_notsync cpu_to_be32(NFSERR_NOT_SYNC)
158 #define nfserr_badcookie cpu_to_be32(NFSERR_BAD_COOKIE)
159 #define nfserr_notsupp cpu_to_be32(NFSERR_NOTSUPP)
160 #define nfserr_toosmall cpu_to_be32(NFSERR_TOOSMALL)
161 #define nfserr_serverfault cpu_to_be32(NFSERR_SERVERFAULT)
162 #define nfserr_badtype cpu_to_be32(NFSERR_BADTYPE)
163 #define nfserr_jukebox cpu_to_be32(NFSERR_JUKEBOX)
164 #define nfserr_denied cpu_to_be32(NFSERR_DENIED)
165 #define nfserr_deadlock cpu_to_be32(NFSERR_DEADLOCK)
166 #define nfserr_expired cpu_to_be32(NFSERR_EXPIRED)
167 #define nfserr_bad_cookie cpu_to_be32(NFSERR_BAD_COOKIE)
168 #define nfserr_same cpu_to_be32(NFSERR_SAME)
169 #define nfserr_clid_inuse cpu_to_be32(NFSERR_CLID_INUSE)
170 #define nfserr_stale_clientid cpu_to_be32(NFSERR_STALE_CLIENTID)
171 #define nfserr_resource cpu_to_be32(NFSERR_RESOURCE)
172 #define nfserr_moved cpu_to_be32(NFSERR_MOVED)
173 #define nfserr_nofilehandle cpu_to_be32(NFSERR_NOFILEHANDLE)
174 #define nfserr_minor_vers_mismatch cpu_to_be32(NFSERR_MINOR_VERS_MISMATCH)
175 #define nfserr_share_denied cpu_to_be32(NFSERR_SHARE_DENIED)
176 #define nfserr_stale_stateid cpu_to_be32(NFSERR_STALE_STATEID)
177 #define nfserr_old_stateid cpu_to_be32(NFSERR_OLD_STATEID)
178 #define nfserr_bad_stateid cpu_to_be32(NFSERR_BAD_STATEID)
179 #define nfserr_bad_seqid cpu_to_be32(NFSERR_BAD_SEQID)
180 #define nfserr_symlink cpu_to_be32(NFSERR_SYMLINK)
181 #define nfserr_not_same cpu_to_be32(NFSERR_NOT_SAME)
182 #define nfserr_lock_range cpu_to_be32(NFSERR_LOCK_RANGE)
183 #define nfserr_restorefh cpu_to_be32(NFSERR_RESTOREFH)
184 #define nfserr_attrnotsupp cpu_to_be32(NFSERR_ATTRNOTSUPP)
185 #define nfserr_bad_xdr cpu_to_be32(NFSERR_BAD_XDR)
186 #define nfserr_openmode cpu_to_be32(NFSERR_OPENMODE)
187 #define nfserr_badowner cpu_to_be32(NFSERR_BADOWNER)
188 #define nfserr_locks_held cpu_to_be32(NFSERR_LOCKS_HELD)
189 #define nfserr_op_illegal cpu_to_be32(NFSERR_OP_ILLEGAL)
190 #define nfserr_grace cpu_to_be32(NFSERR_GRACE)
191 #define nfserr_no_grace cpu_to_be32(NFSERR_NO_GRACE)
192 #define nfserr_reclaim_bad cpu_to_be32(NFSERR_RECLAIM_BAD)
193 #define nfserr_badname cpu_to_be32(NFSERR_BADNAME)
194 #define nfserr_cb_path_down cpu_to_be32(NFSERR_CB_PATH_DOWN)
195 #define nfserr_locked cpu_to_be32(NFSERR_LOCKED)
196 #define nfserr_wrongsec cpu_to_be32(NFSERR_WRONGSEC)
197 #define nfserr_badiomode cpu_to_be32(NFS4ERR_BADIOMODE)
198 #define nfserr_badlayout cpu_to_be32(NFS4ERR_BADLAYOUT)
199 #define nfserr_bad_session_digest cpu_to_be32(NFS4ERR_BAD_SESSION_DIGEST)
200 #define nfserr_badsession cpu_to_be32(NFS4ERR_BADSESSION)
201 #define nfserr_badslot cpu_to_be32(NFS4ERR_BADSLOT)
202 #define nfserr_complete_already cpu_to_be32(NFS4ERR_COMPLETE_ALREADY)
203 #define nfserr_conn_not_bound_to_session cpu_to_be32(NFS4ERR_CONN_NOT_BOUND_TO_SESSION)
204 #define nfserr_deleg_already_wanted cpu_to_be32(NFS4ERR_DELEG_ALREADY_WANTED)
205 #define nfserr_back_chan_busy cpu_to_be32(NFS4ERR_BACK_CHAN_BUSY)
206 #define nfserr_layouttrylater cpu_to_be32(NFS4ERR_LAYOUTTRYLATER)
207 #define nfserr_layoutunavailable cpu_to_be32(NFS4ERR_LAYOUTUNAVAILABLE)
208 #define nfserr_nomatching_layout cpu_to_be32(NFS4ERR_NOMATCHING_LAYOUT)
209 #define nfserr_recallconflict cpu_to_be32(NFS4ERR_RECALLCONFLICT)
210 #define nfserr_unknown_layouttype cpu_to_be32(NFS4ERR_UNKNOWN_LAYOUTTYPE)
211 #define nfserr_seq_misordered cpu_to_be32(NFS4ERR_SEQ_MISORDERED)
212 #define nfserr_sequence_pos cpu_to_be32(NFS4ERR_SEQUENCE_POS)
213 #define nfserr_req_too_big cpu_to_be32(NFS4ERR_REQ_TOO_BIG)
214 #define nfserr_rep_too_big cpu_to_be32(NFS4ERR_REP_TOO_BIG)
215 #define nfserr_rep_too_big_to_cache cpu_to_be32(NFS4ERR_REP_TOO_BIG_TO_CACHE)
216 #define nfserr_retry_uncached_rep cpu_to_be32(NFS4ERR_RETRY_UNCACHED_REP)
217 #define nfserr_unsafe_compound cpu_to_be32(NFS4ERR_UNSAFE_COMPOUND)
218 #define nfserr_too_many_ops cpu_to_be32(NFS4ERR_TOO_MANY_OPS)
219 #define nfserr_op_not_in_session cpu_to_be32(NFS4ERR_OP_NOT_IN_SESSION)
220 #define nfserr_hash_alg_unsupp cpu_to_be32(NFS4ERR_HASH_ALG_UNSUPP)
221 #define nfserr_clientid_busy cpu_to_be32(NFS4ERR_CLIENTID_BUSY)
222 #define nfserr_pnfs_io_hole cpu_to_be32(NFS4ERR_PNFS_IO_HOLE)
223 #define nfserr_seq_false_retry cpu_to_be32(NFS4ERR_SEQ_FALSE_RETRY)
224 #define nfserr_bad_high_slot cpu_to_be32(NFS4ERR_BAD_HIGH_SLOT)
225 #define nfserr_deadsession cpu_to_be32(NFS4ERR_DEADSESSION)
226 #define nfserr_encr_alg_unsupp cpu_to_be32(NFS4ERR_ENCR_ALG_UNSUPP)
227 #define nfserr_pnfs_no_layout cpu_to_be32(NFS4ERR_PNFS_NO_LAYOUT)
228 #define nfserr_not_only_op cpu_to_be32(NFS4ERR_NOT_ONLY_OP)
229 #define nfserr_wrong_cred cpu_to_be32(NFS4ERR_WRONG_CRED)
230 #define nfserr_wrong_type cpu_to_be32(NFS4ERR_WRONG_TYPE)
231 #define nfserr_dirdeleg_unavail cpu_to_be32(NFS4ERR_DIRDELEG_UNAVAIL)
232 #define nfserr_reject_deleg cpu_to_be32(NFS4ERR_REJECT_DELEG)
233 #define nfserr_returnconflict cpu_to_be32(NFS4ERR_RETURNCONFLICT)
234 #define nfserr_deleg_revoked cpu_to_be32(NFS4ERR_DELEG_REVOKED)
236 /* error codes for internal use */
237 /* if a request fails due to kmalloc failure, it gets dropped.
238 * Client should resend eventually
240 #define nfserr_dropit cpu_to_be32(30000)
241 /* end-of-file indicator in readdir */
242 #define nfserr_eof cpu_to_be32(30001)
243 /* replay detected */
244 #define nfserr_replay_me cpu_to_be32(11001)
245 /* nfs41 replay detected */
246 #define nfserr_replay_cache cpu_to_be32(11002)
248 /* Check for dir entries '.' and '..' */
249 #define isdotent(n, l) (l < 3 && n[0] == '.' && (l == 1 || n[1] == '.'))
252 * Time of server startup
254 extern struct timeval nfssvc_boot;
256 #ifdef CONFIG_NFSD_V4
258 extern time_t nfsd4_lease;
259 extern time_t nfsd4_grace;
261 /* before processing a COMPOUND operation, we have to check that there
262 * is enough space in the buffer for XDR encode to succeed. otherwise,
263 * we might process an operation with side effects, and be unable to
264 * tell the client that the operation succeeded.
266 * COMPOUND_SLACK_SPACE - this is the minimum bytes of buffer space
267 * needed to encode an "ordinary" _successful_ operation. (GETATTR,
268 * READ, READDIR, and READLINK have their own buffer checks.) if we
269 * fall below this level, we fail the next operation with NFS4ERR_RESOURCE.
271 * COMPOUND_ERR_SLACK_SPACE - this is the minimum bytes of buffer space
272 * needed to encode an operation which has failed with NFS4ERR_RESOURCE.
273 * care is taken to ensure that we never fall below this level for any
274 * reason.
276 #define COMPOUND_SLACK_SPACE 140 /* OP_GETFH */
277 #define COMPOUND_ERR_SLACK_SPACE 12 /* OP_SETATTR */
279 #define NFSD_LAUNDROMAT_MINTIMEOUT 1 /* seconds */
282 * The following attributes are currently not supported by the NFSv4 server:
283 * ARCHIVE (deprecated anyway)
284 * HIDDEN (unlikely to be supported any time soon)
285 * MIMETYPE (unlikely to be supported any time soon)
286 * QUOTA_* (will be supported in a forthcoming patch)
287 * SYSTEM (unlikely to be supported any time soon)
288 * TIME_BACKUP (unlikely to be supported any time soon)
289 * TIME_CREATE (unlikely to be supported any time soon)
291 #define NFSD4_SUPPORTED_ATTRS_WORD0 \
292 (FATTR4_WORD0_SUPPORTED_ATTRS | FATTR4_WORD0_TYPE | FATTR4_WORD0_FH_EXPIRE_TYPE \
293 | FATTR4_WORD0_CHANGE | FATTR4_WORD0_SIZE | FATTR4_WORD0_LINK_SUPPORT \
294 | FATTR4_WORD0_SYMLINK_SUPPORT | FATTR4_WORD0_NAMED_ATTR | FATTR4_WORD0_FSID \
295 | FATTR4_WORD0_UNIQUE_HANDLES | FATTR4_WORD0_LEASE_TIME | FATTR4_WORD0_RDATTR_ERROR \
296 | FATTR4_WORD0_ACLSUPPORT | FATTR4_WORD0_CANSETTIME | FATTR4_WORD0_CASE_INSENSITIVE \
297 | FATTR4_WORD0_CASE_PRESERVING | FATTR4_WORD0_CHOWN_RESTRICTED \
298 | FATTR4_WORD0_FILEHANDLE | FATTR4_WORD0_FILEID | FATTR4_WORD0_FILES_AVAIL \
299 | FATTR4_WORD0_FILES_FREE | FATTR4_WORD0_FILES_TOTAL | FATTR4_WORD0_FS_LOCATIONS | FATTR4_WORD0_HOMOGENEOUS \
300 | FATTR4_WORD0_MAXFILESIZE | FATTR4_WORD0_MAXLINK | FATTR4_WORD0_MAXNAME \
301 | FATTR4_WORD0_MAXREAD | FATTR4_WORD0_MAXWRITE | FATTR4_WORD0_ACL)
303 #define NFSD4_SUPPORTED_ATTRS_WORD1 \
304 (FATTR4_WORD1_MODE | FATTR4_WORD1_NO_TRUNC | FATTR4_WORD1_NUMLINKS \
305 | FATTR4_WORD1_OWNER | FATTR4_WORD1_OWNER_GROUP | FATTR4_WORD1_RAWDEV \
306 | FATTR4_WORD1_SPACE_AVAIL | FATTR4_WORD1_SPACE_FREE | FATTR4_WORD1_SPACE_TOTAL \
307 | FATTR4_WORD1_SPACE_USED | FATTR4_WORD1_TIME_ACCESS | FATTR4_WORD1_TIME_ACCESS_SET \
308 | FATTR4_WORD1_TIME_DELTA | FATTR4_WORD1_TIME_METADATA \
309 | FATTR4_WORD1_TIME_MODIFY | FATTR4_WORD1_TIME_MODIFY_SET | FATTR4_WORD1_MOUNTED_ON_FILEID)
311 #define NFSD4_SUPPORTED_ATTRS_WORD2 0
313 #define NFSD4_1_SUPPORTED_ATTRS_WORD0 \
314 NFSD4_SUPPORTED_ATTRS_WORD0
316 #define NFSD4_1_SUPPORTED_ATTRS_WORD1 \
317 NFSD4_SUPPORTED_ATTRS_WORD1
319 #define NFSD4_1_SUPPORTED_ATTRS_WORD2 \
320 (NFSD4_SUPPORTED_ATTRS_WORD2 | FATTR4_WORD2_SUPPATTR_EXCLCREAT)
322 static inline u32 nfsd_suppattrs0(u32 minorversion)
324 return minorversion ? NFSD4_1_SUPPORTED_ATTRS_WORD0
325 : NFSD4_SUPPORTED_ATTRS_WORD0;
328 static inline u32 nfsd_suppattrs1(u32 minorversion)
330 return minorversion ? NFSD4_1_SUPPORTED_ATTRS_WORD1
331 : NFSD4_SUPPORTED_ATTRS_WORD1;
334 static inline u32 nfsd_suppattrs2(u32 minorversion)
336 return minorversion ? NFSD4_1_SUPPORTED_ATTRS_WORD2
337 : NFSD4_SUPPORTED_ATTRS_WORD2;
340 /* These will return ERR_INVAL if specified in GETATTR or READDIR. */
341 #define NFSD_WRITEONLY_ATTRS_WORD1 \
342 (FATTR4_WORD1_TIME_ACCESS_SET | FATTR4_WORD1_TIME_MODIFY_SET)
344 /* These are the only attrs allowed in CREATE/OPEN/SETATTR. */
345 #define NFSD_WRITEABLE_ATTRS_WORD0 \
346 (FATTR4_WORD0_SIZE | FATTR4_WORD0_ACL )
347 #define NFSD_WRITEABLE_ATTRS_WORD1 \
348 (FATTR4_WORD1_MODE | FATTR4_WORD1_OWNER | FATTR4_WORD1_OWNER_GROUP \
349 | FATTR4_WORD1_TIME_ACCESS_SET | FATTR4_WORD1_TIME_MODIFY_SET)
350 #define NFSD_WRITEABLE_ATTRS_WORD2 0
352 #define NFSD_SUPPATTR_EXCLCREAT_WORD0 \
353 NFSD_WRITEABLE_ATTRS_WORD0
355 * we currently store the exclusive create verifier in the v_{a,m}time
356 * attributes so the client can't set these at create time using EXCLUSIVE4_1
358 #define NFSD_SUPPATTR_EXCLCREAT_WORD1 \
359 (NFSD_WRITEABLE_ATTRS_WORD1 & \
360 ~(FATTR4_WORD1_TIME_ACCESS_SET | FATTR4_WORD1_TIME_MODIFY_SET))
361 #define NFSD_SUPPATTR_EXCLCREAT_WORD2 \
362 NFSD_WRITEABLE_ATTRS_WORD2
364 #endif /* CONFIG_NFSD_V4 */
366 #endif /* LINUX_NFSD_NFSD_H */