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Linux kernel mirror (for testing)
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linux
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/nfs.h>
15#include <linux/nfs2.h>
16#include <linux/nfs3.h>
17#include <linux/nfs4.h>
18#include <linux/sunrpc/msg_prot.h>
19
20#include <linux/nfsd/debug.h>
21#include <linux/nfsd/export.h>
22#include <linux/nfsd/stats.h>
23
24/*
25 * nfsd version
26 */
27#define NFSD_SUPPORTED_MINOR_VERSION 2
28/*
29 * Maximum blocksizes supported by daemon under various circumstances.
30 */
31#define NFSSVC_MAXBLKSIZE RPCSVC_MAXPAYLOAD
32/* NFSv2 is limited by the protocol specification, see RFC 1094 */
33#define NFSSVC_MAXBLKSIZE_V2 (8*1024)
34
35
36/*
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.
42 *
43 * Note that accuracy here doesn't matter too much as the
44 * size is rounded up to a page size when allocating space.
45 */
46#define NFSD_BUFSIZE ((RPC_MAX_HEADER_WITH_AUTH+26)*XDR_UNIT + NFSSVC_MAXBLKSIZE)
47
48struct readdir_cd {
49 __be32 err; /* 0, nfserr, or nfserr_eof */
50};
51
52
53extern struct svc_program nfsd_program;
54extern struct svc_version nfsd_version2, nfsd_version3,
55 nfsd_version4;
56extern struct mutex nfsd_mutex;
57extern spinlock_t nfsd_drc_lock;
58extern unsigned long nfsd_drc_max_mem;
59extern unsigned long nfsd_drc_mem_used;
60
61extern const struct seq_operations nfs_exports_op;
62
63/*
64 * Function prototypes.
65 */
66int nfsd_svc(int nrservs, struct net *net);
67int nfsd_dispatch(struct svc_rqst *rqstp, __be32 *statp);
68
69int nfsd_nrthreads(struct net *);
70int nfsd_nrpools(struct net *);
71int nfsd_get_nrthreads(int n, int *, struct net *);
72int nfsd_set_nrthreads(int n, int *, struct net *);
73int nfsd_pool_stats_open(struct inode *, struct file *);
74int nfsd_pool_stats_release(struct inode *, struct file *);
75
76void nfsd_destroy(struct net *net);
77
78#if defined(CONFIG_NFSD_V2_ACL) || defined(CONFIG_NFSD_V3_ACL)
79#ifdef CONFIG_NFSD_V2_ACL
80extern struct svc_version nfsd_acl_version2;
81#else
82#define nfsd_acl_version2 NULL
83#endif
84#ifdef CONFIG_NFSD_V3_ACL
85extern struct svc_version nfsd_acl_version3;
86#else
87#define nfsd_acl_version3 NULL
88#endif
89#endif
90
91enum vers_op {NFSD_SET, NFSD_CLEAR, NFSD_TEST, NFSD_AVAIL };
92int nfsd_vers(int vers, enum vers_op change);
93int nfsd_minorversion(u32 minorversion, enum vers_op change);
94void nfsd_reset_versions(void);
95int nfsd_create_serv(struct net *net);
96
97extern int nfsd_max_blksize;
98
99static inline int nfsd_v4client(struct svc_rqst *rq)
100{
101 return rq->rq_prog == NFS_PROGRAM && rq->rq_vers == 4;
102}
103
104/*
105 * NFSv4 State
106 */
107#ifdef CONFIG_NFSD_V4
108extern unsigned long max_delegations;
109void nfs4_state_init(void);
110int nfsd4_init_slabs(void);
111void nfsd4_free_slabs(void);
112int nfs4_state_start(void);
113int nfs4_state_start_net(struct net *net);
114void nfs4_state_shutdown(void);
115void nfs4_state_shutdown_net(struct net *net);
116void nfs4_reset_lease(time_t leasetime);
117int nfs4_reset_recoverydir(char *recdir);
118char * nfs4_recoverydir(void);
119#else
120static inline void nfs4_state_init(void) { }
121static inline int nfsd4_init_slabs(void) { return 0; }
122static inline void nfsd4_free_slabs(void) { }
123static inline int nfs4_state_start(void) { return 0; }
124static inline int nfs4_state_start_net(struct net *net) { return 0; }
125static inline void nfs4_state_shutdown(void) { }
126static inline void nfs4_state_shutdown_net(struct net *net) { }
127static inline void nfs4_reset_lease(time_t leasetime) { }
128static inline int nfs4_reset_recoverydir(char *recdir) { return 0; }
129static inline char * nfs4_recoverydir(void) {return NULL; }
130#endif
131
132/*
133 * lockd binding
134 */
135void nfsd_lockd_init(void);
136void nfsd_lockd_shutdown(void);
137
138
139/*
140 * These macros provide pre-xdr'ed values for faster operation.
141 */
142#define nfs_ok cpu_to_be32(NFS_OK)
143#define nfserr_perm cpu_to_be32(NFSERR_PERM)
144#define nfserr_noent cpu_to_be32(NFSERR_NOENT)
145#define nfserr_io cpu_to_be32(NFSERR_IO)
146#define nfserr_nxio cpu_to_be32(NFSERR_NXIO)
147#define nfserr_eagain cpu_to_be32(NFSERR_EAGAIN)
148#define nfserr_acces cpu_to_be32(NFSERR_ACCES)
149#define nfserr_exist cpu_to_be32(NFSERR_EXIST)
150#define nfserr_xdev cpu_to_be32(NFSERR_XDEV)
151#define nfserr_nodev cpu_to_be32(NFSERR_NODEV)
152#define nfserr_notdir cpu_to_be32(NFSERR_NOTDIR)
153#define nfserr_isdir cpu_to_be32(NFSERR_ISDIR)
154#define nfserr_inval cpu_to_be32(NFSERR_INVAL)
155#define nfserr_fbig cpu_to_be32(NFSERR_FBIG)
156#define nfserr_nospc cpu_to_be32(NFSERR_NOSPC)
157#define nfserr_rofs cpu_to_be32(NFSERR_ROFS)
158#define nfserr_mlink cpu_to_be32(NFSERR_MLINK)
159#define nfserr_opnotsupp cpu_to_be32(NFSERR_OPNOTSUPP)
160#define nfserr_nametoolong cpu_to_be32(NFSERR_NAMETOOLONG)
161#define nfserr_notempty cpu_to_be32(NFSERR_NOTEMPTY)
162#define nfserr_dquot cpu_to_be32(NFSERR_DQUOT)
163#define nfserr_stale cpu_to_be32(NFSERR_STALE)
164#define nfserr_remote cpu_to_be32(NFSERR_REMOTE)
165#define nfserr_wflush cpu_to_be32(NFSERR_WFLUSH)
166#define nfserr_badhandle cpu_to_be32(NFSERR_BADHANDLE)
167#define nfserr_notsync cpu_to_be32(NFSERR_NOT_SYNC)
168#define nfserr_badcookie cpu_to_be32(NFSERR_BAD_COOKIE)
169#define nfserr_notsupp cpu_to_be32(NFSERR_NOTSUPP)
170#define nfserr_toosmall cpu_to_be32(NFSERR_TOOSMALL)
171#define nfserr_serverfault cpu_to_be32(NFSERR_SERVERFAULT)
172#define nfserr_badtype cpu_to_be32(NFSERR_BADTYPE)
173#define nfserr_jukebox cpu_to_be32(NFSERR_JUKEBOX)
174#define nfserr_denied cpu_to_be32(NFSERR_DENIED)
175#define nfserr_deadlock cpu_to_be32(NFSERR_DEADLOCK)
176#define nfserr_expired cpu_to_be32(NFSERR_EXPIRED)
177#define nfserr_bad_cookie cpu_to_be32(NFSERR_BAD_COOKIE)
178#define nfserr_same cpu_to_be32(NFSERR_SAME)
179#define nfserr_clid_inuse cpu_to_be32(NFSERR_CLID_INUSE)
180#define nfserr_stale_clientid cpu_to_be32(NFSERR_STALE_CLIENTID)
181#define nfserr_resource cpu_to_be32(NFSERR_RESOURCE)
182#define nfserr_moved cpu_to_be32(NFSERR_MOVED)
183#define nfserr_nofilehandle cpu_to_be32(NFSERR_NOFILEHANDLE)
184#define nfserr_minor_vers_mismatch cpu_to_be32(NFSERR_MINOR_VERS_MISMATCH)
185#define nfserr_share_denied cpu_to_be32(NFSERR_SHARE_DENIED)
186#define nfserr_stale_stateid cpu_to_be32(NFSERR_STALE_STATEID)
187#define nfserr_old_stateid cpu_to_be32(NFSERR_OLD_STATEID)
188#define nfserr_bad_stateid cpu_to_be32(NFSERR_BAD_STATEID)
189#define nfserr_bad_seqid cpu_to_be32(NFSERR_BAD_SEQID)
190#define nfserr_symlink cpu_to_be32(NFSERR_SYMLINK)
191#define nfserr_not_same cpu_to_be32(NFSERR_NOT_SAME)
192#define nfserr_lock_range cpu_to_be32(NFSERR_LOCK_RANGE)
193#define nfserr_restorefh cpu_to_be32(NFSERR_RESTOREFH)
194#define nfserr_attrnotsupp cpu_to_be32(NFSERR_ATTRNOTSUPP)
195#define nfserr_bad_xdr cpu_to_be32(NFSERR_BAD_XDR)
196#define nfserr_openmode cpu_to_be32(NFSERR_OPENMODE)
197#define nfserr_badowner cpu_to_be32(NFSERR_BADOWNER)
198#define nfserr_locks_held cpu_to_be32(NFSERR_LOCKS_HELD)
199#define nfserr_op_illegal cpu_to_be32(NFSERR_OP_ILLEGAL)
200#define nfserr_grace cpu_to_be32(NFSERR_GRACE)
201#define nfserr_no_grace cpu_to_be32(NFSERR_NO_GRACE)
202#define nfserr_reclaim_bad cpu_to_be32(NFSERR_RECLAIM_BAD)
203#define nfserr_badname cpu_to_be32(NFSERR_BADNAME)
204#define nfserr_cb_path_down cpu_to_be32(NFSERR_CB_PATH_DOWN)
205#define nfserr_locked cpu_to_be32(NFSERR_LOCKED)
206#define nfserr_wrongsec cpu_to_be32(NFSERR_WRONGSEC)
207#define nfserr_badiomode cpu_to_be32(NFS4ERR_BADIOMODE)
208#define nfserr_badlayout cpu_to_be32(NFS4ERR_BADLAYOUT)
209#define nfserr_bad_session_digest cpu_to_be32(NFS4ERR_BAD_SESSION_DIGEST)
210#define nfserr_badsession cpu_to_be32(NFS4ERR_BADSESSION)
211#define nfserr_badslot cpu_to_be32(NFS4ERR_BADSLOT)
212#define nfserr_complete_already cpu_to_be32(NFS4ERR_COMPLETE_ALREADY)
213#define nfserr_conn_not_bound_to_session cpu_to_be32(NFS4ERR_CONN_NOT_BOUND_TO_SESSION)
214#define nfserr_deleg_already_wanted cpu_to_be32(NFS4ERR_DELEG_ALREADY_WANTED)
215#define nfserr_back_chan_busy cpu_to_be32(NFS4ERR_BACK_CHAN_BUSY)
216#define nfserr_layouttrylater cpu_to_be32(NFS4ERR_LAYOUTTRYLATER)
217#define nfserr_layoutunavailable cpu_to_be32(NFS4ERR_LAYOUTUNAVAILABLE)
218#define nfserr_nomatching_layout cpu_to_be32(NFS4ERR_NOMATCHING_LAYOUT)
219#define nfserr_recallconflict cpu_to_be32(NFS4ERR_RECALLCONFLICT)
220#define nfserr_unknown_layouttype cpu_to_be32(NFS4ERR_UNKNOWN_LAYOUTTYPE)
221#define nfserr_seq_misordered cpu_to_be32(NFS4ERR_SEQ_MISORDERED)
222#define nfserr_sequence_pos cpu_to_be32(NFS4ERR_SEQUENCE_POS)
223#define nfserr_req_too_big cpu_to_be32(NFS4ERR_REQ_TOO_BIG)
224#define nfserr_rep_too_big cpu_to_be32(NFS4ERR_REP_TOO_BIG)
225#define nfserr_rep_too_big_to_cache cpu_to_be32(NFS4ERR_REP_TOO_BIG_TO_CACHE)
226#define nfserr_retry_uncached_rep cpu_to_be32(NFS4ERR_RETRY_UNCACHED_REP)
227#define nfserr_unsafe_compound cpu_to_be32(NFS4ERR_UNSAFE_COMPOUND)
228#define nfserr_too_many_ops cpu_to_be32(NFS4ERR_TOO_MANY_OPS)
229#define nfserr_op_not_in_session cpu_to_be32(NFS4ERR_OP_NOT_IN_SESSION)
230#define nfserr_hash_alg_unsupp cpu_to_be32(NFS4ERR_HASH_ALG_UNSUPP)
231#define nfserr_clientid_busy cpu_to_be32(NFS4ERR_CLIENTID_BUSY)
232#define nfserr_pnfs_io_hole cpu_to_be32(NFS4ERR_PNFS_IO_HOLE)
233#define nfserr_seq_false_retry cpu_to_be32(NFS4ERR_SEQ_FALSE_RETRY)
234#define nfserr_bad_high_slot cpu_to_be32(NFS4ERR_BAD_HIGH_SLOT)
235#define nfserr_deadsession cpu_to_be32(NFS4ERR_DEADSESSION)
236#define nfserr_encr_alg_unsupp cpu_to_be32(NFS4ERR_ENCR_ALG_UNSUPP)
237#define nfserr_pnfs_no_layout cpu_to_be32(NFS4ERR_PNFS_NO_LAYOUT)
238#define nfserr_not_only_op cpu_to_be32(NFS4ERR_NOT_ONLY_OP)
239#define nfserr_wrong_cred cpu_to_be32(NFS4ERR_WRONG_CRED)
240#define nfserr_wrong_type cpu_to_be32(NFS4ERR_WRONG_TYPE)
241#define nfserr_dirdeleg_unavail cpu_to_be32(NFS4ERR_DIRDELEG_UNAVAIL)
242#define nfserr_reject_deleg cpu_to_be32(NFS4ERR_REJECT_DELEG)
243#define nfserr_returnconflict cpu_to_be32(NFS4ERR_RETURNCONFLICT)
244#define nfserr_deleg_revoked cpu_to_be32(NFS4ERR_DELEG_REVOKED)
245#define nfserr_partner_notsupp cpu_to_be32(NFS4ERR_PARTNER_NOTSUPP)
246#define nfserr_partner_no_auth cpu_to_be32(NFS4ERR_PARTNER_NO_AUTH)
247#define nfserr_metadata_notsupp cpu_to_be32(NFS4ERR_METADATA_NOTSUPP)
248#define nfserr_offload_denied cpu_to_be32(NFS4ERR_OFFLOAD_DENIED)
249#define nfserr_wrong_lfs cpu_to_be32(NFS4ERR_WRONG_LFS)
250#define nfserr_badlabel cpu_to_be32(NFS4ERR_BADLABEL)
251
252/* error codes for internal use */
253/* if a request fails due to kmalloc failure, it gets dropped.
254 * Client should resend eventually
255 */
256#define nfserr_dropit cpu_to_be32(30000)
257/* end-of-file indicator in readdir */
258#define nfserr_eof cpu_to_be32(30001)
259/* replay detected */
260#define nfserr_replay_me cpu_to_be32(11001)
261/* nfs41 replay detected */
262#define nfserr_replay_cache cpu_to_be32(11002)
263
264/* Check for dir entries '.' and '..' */
265#define isdotent(n, l) (l < 3 && n[0] == '.' && (l == 1 || n[1] == '.'))
266
267#ifdef CONFIG_NFSD_V4
268
269/* before processing a COMPOUND operation, we have to check that there
270 * is enough space in the buffer for XDR encode to succeed. otherwise,
271 * we might process an operation with side effects, and be unable to
272 * tell the client that the operation succeeded.
273 *
274 * COMPOUND_SLACK_SPACE - this is the minimum bytes of buffer space
275 * needed to encode an "ordinary" _successful_ operation. (GETATTR,
276 * READ, READDIR, and READLINK have their own buffer checks.) if we
277 * fall below this level, we fail the next operation with NFS4ERR_RESOURCE.
278 *
279 * COMPOUND_ERR_SLACK_SPACE - this is the minimum bytes of buffer space
280 * needed to encode an operation which has failed with NFS4ERR_RESOURCE.
281 * care is taken to ensure that we never fall below this level for any
282 * reason.
283 */
284#define COMPOUND_SLACK_SPACE 140 /* OP_GETFH */
285#define COMPOUND_ERR_SLACK_SPACE 12 /* OP_SETATTR */
286
287#define NFSD_LAUNDROMAT_MINTIMEOUT 1 /* seconds */
288
289/*
290 * The following attributes are currently not supported by the NFSv4 server:
291 * ARCHIVE (deprecated anyway)
292 * HIDDEN (unlikely to be supported any time soon)
293 * MIMETYPE (unlikely to be supported any time soon)
294 * QUOTA_* (will be supported in a forthcoming patch)
295 * SYSTEM (unlikely to be supported any time soon)
296 * TIME_BACKUP (unlikely to be supported any time soon)
297 * TIME_CREATE (unlikely to be supported any time soon)
298 */
299#define NFSD4_SUPPORTED_ATTRS_WORD0 \
300(FATTR4_WORD0_SUPPORTED_ATTRS | FATTR4_WORD0_TYPE | FATTR4_WORD0_FH_EXPIRE_TYPE \
301 | FATTR4_WORD0_CHANGE | FATTR4_WORD0_SIZE | FATTR4_WORD0_LINK_SUPPORT \
302 | FATTR4_WORD0_SYMLINK_SUPPORT | FATTR4_WORD0_NAMED_ATTR | FATTR4_WORD0_FSID \
303 | FATTR4_WORD0_UNIQUE_HANDLES | FATTR4_WORD0_LEASE_TIME | FATTR4_WORD0_RDATTR_ERROR \
304 | FATTR4_WORD0_ACLSUPPORT | FATTR4_WORD0_CANSETTIME | FATTR4_WORD0_CASE_INSENSITIVE \
305 | FATTR4_WORD0_CASE_PRESERVING | FATTR4_WORD0_CHOWN_RESTRICTED \
306 | FATTR4_WORD0_FILEHANDLE | FATTR4_WORD0_FILEID | FATTR4_WORD0_FILES_AVAIL \
307 | FATTR4_WORD0_FILES_FREE | FATTR4_WORD0_FILES_TOTAL | FATTR4_WORD0_FS_LOCATIONS | FATTR4_WORD0_HOMOGENEOUS \
308 | FATTR4_WORD0_MAXFILESIZE | FATTR4_WORD0_MAXLINK | FATTR4_WORD0_MAXNAME \
309 | FATTR4_WORD0_MAXREAD | FATTR4_WORD0_MAXWRITE | FATTR4_WORD0_ACL)
310
311#define NFSD4_SUPPORTED_ATTRS_WORD1 \
312(FATTR4_WORD1_MODE | FATTR4_WORD1_NO_TRUNC | FATTR4_WORD1_NUMLINKS \
313 | FATTR4_WORD1_OWNER | FATTR4_WORD1_OWNER_GROUP | FATTR4_WORD1_RAWDEV \
314 | FATTR4_WORD1_SPACE_AVAIL | FATTR4_WORD1_SPACE_FREE | FATTR4_WORD1_SPACE_TOTAL \
315 | FATTR4_WORD1_SPACE_USED | FATTR4_WORD1_TIME_ACCESS | FATTR4_WORD1_TIME_ACCESS_SET \
316 | FATTR4_WORD1_TIME_DELTA | FATTR4_WORD1_TIME_METADATA \
317 | FATTR4_WORD1_TIME_MODIFY | FATTR4_WORD1_TIME_MODIFY_SET | FATTR4_WORD1_MOUNTED_ON_FILEID)
318
319#define NFSD4_SUPPORTED_ATTRS_WORD2 0
320
321#define NFSD4_1_SUPPORTED_ATTRS_WORD0 \
322 NFSD4_SUPPORTED_ATTRS_WORD0
323
324#define NFSD4_1_SUPPORTED_ATTRS_WORD1 \
325 NFSD4_SUPPORTED_ATTRS_WORD1
326
327#define NFSD4_1_SUPPORTED_ATTRS_WORD2 \
328 (NFSD4_SUPPORTED_ATTRS_WORD2 | FATTR4_WORD2_SUPPATTR_EXCLCREAT)
329
330#ifdef CONFIG_NFSD_V4_SECURITY_LABEL
331#define NFSD4_2_SUPPORTED_ATTRS_WORD2 \
332 (NFSD4_1_SUPPORTED_ATTRS_WORD2 | FATTR4_WORD2_SECURITY_LABEL)
333#else
334#define NFSD4_2_SUPPORTED_ATTRS_WORD2 0
335#endif
336
337static inline u32 nfsd_suppattrs0(u32 minorversion)
338{
339 return minorversion ? NFSD4_1_SUPPORTED_ATTRS_WORD0
340 : NFSD4_SUPPORTED_ATTRS_WORD0;
341}
342
343static inline u32 nfsd_suppattrs1(u32 minorversion)
344{
345 return minorversion ? NFSD4_1_SUPPORTED_ATTRS_WORD1
346 : NFSD4_SUPPORTED_ATTRS_WORD1;
347}
348
349static inline u32 nfsd_suppattrs2(u32 minorversion)
350{
351 switch (minorversion) {
352 default: return NFSD4_2_SUPPORTED_ATTRS_WORD2;
353 case 1: return NFSD4_1_SUPPORTED_ATTRS_WORD2;
354 case 0: return NFSD4_SUPPORTED_ATTRS_WORD2;
355 }
356}
357
358/* These will return ERR_INVAL if specified in GETATTR or READDIR. */
359#define NFSD_WRITEONLY_ATTRS_WORD1 \
360 (FATTR4_WORD1_TIME_ACCESS_SET | FATTR4_WORD1_TIME_MODIFY_SET)
361
362/* These are the only attrs allowed in CREATE/OPEN/SETATTR. */
363#define NFSD_WRITEABLE_ATTRS_WORD0 \
364 (FATTR4_WORD0_SIZE | FATTR4_WORD0_ACL)
365#define NFSD_WRITEABLE_ATTRS_WORD1 \
366 (FATTR4_WORD1_MODE | FATTR4_WORD1_OWNER | FATTR4_WORD1_OWNER_GROUP \
367 | FATTR4_WORD1_TIME_ACCESS_SET | FATTR4_WORD1_TIME_MODIFY_SET)
368#ifdef CONFIG_NFSD_V4_SECURITY_LABEL
369#define NFSD_WRITEABLE_ATTRS_WORD2 FATTR4_WORD2_SECURITY_LABEL
370#else
371#define NFSD_WRITEABLE_ATTRS_WORD2 0
372#endif
373
374#define NFSD_SUPPATTR_EXCLCREAT_WORD0 \
375 NFSD_WRITEABLE_ATTRS_WORD0
376/*
377 * we currently store the exclusive create verifier in the v_{a,m}time
378 * attributes so the client can't set these at create time using EXCLUSIVE4_1
379 */
380#define NFSD_SUPPATTR_EXCLCREAT_WORD1 \
381 (NFSD_WRITEABLE_ATTRS_WORD1 & \
382 ~(FATTR4_WORD1_TIME_ACCESS_SET | FATTR4_WORD1_TIME_MODIFY_SET))
383#define NFSD_SUPPATTR_EXCLCREAT_WORD2 \
384 NFSD_WRITEABLE_ATTRS_WORD2
385
386extern int nfsd4_is_junction(struct dentry *dentry);
387extern int register_cld_notifier(void);
388extern void unregister_cld_notifier(void);
389#else /* CONFIG_NFSD_V4 */
390static inline int nfsd4_is_junction(struct dentry *dentry)
391{
392 return 0;
393}
394
395#define register_cld_notifier() 0
396#define unregister_cld_notifier() do { } while(0)
397
398#endif /* CONFIG_NFSD_V4 */
399
400#endif /* LINUX_NFSD_NFSD_H */