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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 1
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 u32 nfsd_supported_minorversion;
57extern struct mutex nfsd_mutex;
58extern struct svc_serv *nfsd_serv;
59extern spinlock_t nfsd_drc_lock;
60extern unsigned int nfsd_drc_max_mem;
61extern unsigned int nfsd_drc_mem_used;
62
63extern const struct seq_operations nfs_exports_op;
64
65/*
66 * Function prototypes.
67 */
68int nfsd_svc(unsigned short port, int nrservs);
69int nfsd_dispatch(struct svc_rqst *rqstp, __be32 *statp);
70
71int nfsd_nrthreads(void);
72int nfsd_nrpools(void);
73int nfsd_get_nrthreads(int n, int *);
74int nfsd_set_nrthreads(int n, int *);
75
76static inline void nfsd_destroy(struct net *net)
77{
78 int destroy = (nfsd_serv->sv_nrthreads == 1);
79
80 if (destroy)
81 svc_shutdown_net(nfsd_serv, net);
82 svc_destroy(nfsd_serv);
83 if (destroy)
84 nfsd_serv = NULL;
85}
86
87#if defined(CONFIG_NFSD_V2_ACL) || defined(CONFIG_NFSD_V3_ACL)
88#ifdef CONFIG_NFSD_V2_ACL
89extern struct svc_version nfsd_acl_version2;
90#else
91#define nfsd_acl_version2 NULL
92#endif
93#ifdef CONFIG_NFSD_V3_ACL
94extern struct svc_version nfsd_acl_version3;
95#else
96#define nfsd_acl_version3 NULL
97#endif
98#endif
99
100enum vers_op {NFSD_SET, NFSD_CLEAR, NFSD_TEST, NFSD_AVAIL };
101int nfsd_vers(int vers, enum vers_op change);
102int nfsd_minorversion(u32 minorversion, enum vers_op change);
103void nfsd_reset_versions(void);
104int nfsd_create_serv(void);
105
106extern int nfsd_max_blksize;
107
108static inline int nfsd_v4client(struct svc_rqst *rq)
109{
110 return rq->rq_prog == NFS_PROGRAM && rq->rq_vers == 4;
111}
112
113/*
114 * NFSv4 State
115 */
116#ifdef CONFIG_NFSD_V4
117extern unsigned int max_delegations;
118void nfs4_state_init(void);
119int nfsd4_init_slabs(void);
120void nfsd4_free_slabs(void);
121int nfs4_state_start(void);
122void nfs4_state_shutdown(void);
123void nfs4_reset_lease(time_t leasetime);
124int nfs4_reset_recoverydir(char *recdir);
125#else
126static inline void nfs4_state_init(void) { }
127static inline int nfsd4_init_slabs(void) { return 0; }
128static inline void nfsd4_free_slabs(void) { }
129static inline int nfs4_state_start(void) { return 0; }
130static inline void nfs4_state_shutdown(void) { }
131static inline void nfs4_reset_lease(time_t leasetime) { }
132static inline int nfs4_reset_recoverydir(char *recdir) { return 0; }
133#endif
134
135/*
136 * lockd binding
137 */
138void nfsd_lockd_init(void);
139void nfsd_lockd_shutdown(void);
140
141
142/*
143 * These macros provide pre-xdr'ed values for faster operation.
144 */
145#define nfs_ok cpu_to_be32(NFS_OK)
146#define nfserr_perm cpu_to_be32(NFSERR_PERM)
147#define nfserr_noent cpu_to_be32(NFSERR_NOENT)
148#define nfserr_io cpu_to_be32(NFSERR_IO)
149#define nfserr_nxio cpu_to_be32(NFSERR_NXIO)
150#define nfserr_eagain cpu_to_be32(NFSERR_EAGAIN)
151#define nfserr_acces cpu_to_be32(NFSERR_ACCES)
152#define nfserr_exist cpu_to_be32(NFSERR_EXIST)
153#define nfserr_xdev cpu_to_be32(NFSERR_XDEV)
154#define nfserr_nodev cpu_to_be32(NFSERR_NODEV)
155#define nfserr_notdir cpu_to_be32(NFSERR_NOTDIR)
156#define nfserr_isdir cpu_to_be32(NFSERR_ISDIR)
157#define nfserr_inval cpu_to_be32(NFSERR_INVAL)
158#define nfserr_fbig cpu_to_be32(NFSERR_FBIG)
159#define nfserr_nospc cpu_to_be32(NFSERR_NOSPC)
160#define nfserr_rofs cpu_to_be32(NFSERR_ROFS)
161#define nfserr_mlink cpu_to_be32(NFSERR_MLINK)
162#define nfserr_opnotsupp cpu_to_be32(NFSERR_OPNOTSUPP)
163#define nfserr_nametoolong cpu_to_be32(NFSERR_NAMETOOLONG)
164#define nfserr_notempty cpu_to_be32(NFSERR_NOTEMPTY)
165#define nfserr_dquot cpu_to_be32(NFSERR_DQUOT)
166#define nfserr_stale cpu_to_be32(NFSERR_STALE)
167#define nfserr_remote cpu_to_be32(NFSERR_REMOTE)
168#define nfserr_wflush cpu_to_be32(NFSERR_WFLUSH)
169#define nfserr_badhandle cpu_to_be32(NFSERR_BADHANDLE)
170#define nfserr_notsync cpu_to_be32(NFSERR_NOT_SYNC)
171#define nfserr_badcookie cpu_to_be32(NFSERR_BAD_COOKIE)
172#define nfserr_notsupp cpu_to_be32(NFSERR_NOTSUPP)
173#define nfserr_toosmall cpu_to_be32(NFSERR_TOOSMALL)
174#define nfserr_serverfault cpu_to_be32(NFSERR_SERVERFAULT)
175#define nfserr_badtype cpu_to_be32(NFSERR_BADTYPE)
176#define nfserr_jukebox cpu_to_be32(NFSERR_JUKEBOX)
177#define nfserr_denied cpu_to_be32(NFSERR_DENIED)
178#define nfserr_deadlock cpu_to_be32(NFSERR_DEADLOCK)
179#define nfserr_expired cpu_to_be32(NFSERR_EXPIRED)
180#define nfserr_bad_cookie cpu_to_be32(NFSERR_BAD_COOKIE)
181#define nfserr_same cpu_to_be32(NFSERR_SAME)
182#define nfserr_clid_inuse cpu_to_be32(NFSERR_CLID_INUSE)
183#define nfserr_stale_clientid cpu_to_be32(NFSERR_STALE_CLIENTID)
184#define nfserr_resource cpu_to_be32(NFSERR_RESOURCE)
185#define nfserr_moved cpu_to_be32(NFSERR_MOVED)
186#define nfserr_nofilehandle cpu_to_be32(NFSERR_NOFILEHANDLE)
187#define nfserr_minor_vers_mismatch cpu_to_be32(NFSERR_MINOR_VERS_MISMATCH)
188#define nfserr_share_denied cpu_to_be32(NFSERR_SHARE_DENIED)
189#define nfserr_stale_stateid cpu_to_be32(NFSERR_STALE_STATEID)
190#define nfserr_old_stateid cpu_to_be32(NFSERR_OLD_STATEID)
191#define nfserr_bad_stateid cpu_to_be32(NFSERR_BAD_STATEID)
192#define nfserr_bad_seqid cpu_to_be32(NFSERR_BAD_SEQID)
193#define nfserr_symlink cpu_to_be32(NFSERR_SYMLINK)
194#define nfserr_not_same cpu_to_be32(NFSERR_NOT_SAME)
195#define nfserr_lock_range cpu_to_be32(NFSERR_LOCK_RANGE)
196#define nfserr_restorefh cpu_to_be32(NFSERR_RESTOREFH)
197#define nfserr_attrnotsupp cpu_to_be32(NFSERR_ATTRNOTSUPP)
198#define nfserr_bad_xdr cpu_to_be32(NFSERR_BAD_XDR)
199#define nfserr_openmode cpu_to_be32(NFSERR_OPENMODE)
200#define nfserr_badowner cpu_to_be32(NFSERR_BADOWNER)
201#define nfserr_locks_held cpu_to_be32(NFSERR_LOCKS_HELD)
202#define nfserr_op_illegal cpu_to_be32(NFSERR_OP_ILLEGAL)
203#define nfserr_grace cpu_to_be32(NFSERR_GRACE)
204#define nfserr_no_grace cpu_to_be32(NFSERR_NO_GRACE)
205#define nfserr_reclaim_bad cpu_to_be32(NFSERR_RECLAIM_BAD)
206#define nfserr_badname cpu_to_be32(NFSERR_BADNAME)
207#define nfserr_cb_path_down cpu_to_be32(NFSERR_CB_PATH_DOWN)
208#define nfserr_locked cpu_to_be32(NFSERR_LOCKED)
209#define nfserr_wrongsec cpu_to_be32(NFSERR_WRONGSEC)
210#define nfserr_badiomode cpu_to_be32(NFS4ERR_BADIOMODE)
211#define nfserr_badlayout cpu_to_be32(NFS4ERR_BADLAYOUT)
212#define nfserr_bad_session_digest cpu_to_be32(NFS4ERR_BAD_SESSION_DIGEST)
213#define nfserr_badsession cpu_to_be32(NFS4ERR_BADSESSION)
214#define nfserr_badslot cpu_to_be32(NFS4ERR_BADSLOT)
215#define nfserr_complete_already cpu_to_be32(NFS4ERR_COMPLETE_ALREADY)
216#define nfserr_conn_not_bound_to_session cpu_to_be32(NFS4ERR_CONN_NOT_BOUND_TO_SESSION)
217#define nfserr_deleg_already_wanted cpu_to_be32(NFS4ERR_DELEG_ALREADY_WANTED)
218#define nfserr_back_chan_busy cpu_to_be32(NFS4ERR_BACK_CHAN_BUSY)
219#define nfserr_layouttrylater cpu_to_be32(NFS4ERR_LAYOUTTRYLATER)
220#define nfserr_layoutunavailable cpu_to_be32(NFS4ERR_LAYOUTUNAVAILABLE)
221#define nfserr_nomatching_layout cpu_to_be32(NFS4ERR_NOMATCHING_LAYOUT)
222#define nfserr_recallconflict cpu_to_be32(NFS4ERR_RECALLCONFLICT)
223#define nfserr_unknown_layouttype cpu_to_be32(NFS4ERR_UNKNOWN_LAYOUTTYPE)
224#define nfserr_seq_misordered cpu_to_be32(NFS4ERR_SEQ_MISORDERED)
225#define nfserr_sequence_pos cpu_to_be32(NFS4ERR_SEQUENCE_POS)
226#define nfserr_req_too_big cpu_to_be32(NFS4ERR_REQ_TOO_BIG)
227#define nfserr_rep_too_big cpu_to_be32(NFS4ERR_REP_TOO_BIG)
228#define nfserr_rep_too_big_to_cache cpu_to_be32(NFS4ERR_REP_TOO_BIG_TO_CACHE)
229#define nfserr_retry_uncached_rep cpu_to_be32(NFS4ERR_RETRY_UNCACHED_REP)
230#define nfserr_unsafe_compound cpu_to_be32(NFS4ERR_UNSAFE_COMPOUND)
231#define nfserr_too_many_ops cpu_to_be32(NFS4ERR_TOO_MANY_OPS)
232#define nfserr_op_not_in_session cpu_to_be32(NFS4ERR_OP_NOT_IN_SESSION)
233#define nfserr_hash_alg_unsupp cpu_to_be32(NFS4ERR_HASH_ALG_UNSUPP)
234#define nfserr_clientid_busy cpu_to_be32(NFS4ERR_CLIENTID_BUSY)
235#define nfserr_pnfs_io_hole cpu_to_be32(NFS4ERR_PNFS_IO_HOLE)
236#define nfserr_seq_false_retry cpu_to_be32(NFS4ERR_SEQ_FALSE_RETRY)
237#define nfserr_bad_high_slot cpu_to_be32(NFS4ERR_BAD_HIGH_SLOT)
238#define nfserr_deadsession cpu_to_be32(NFS4ERR_DEADSESSION)
239#define nfserr_encr_alg_unsupp cpu_to_be32(NFS4ERR_ENCR_ALG_UNSUPP)
240#define nfserr_pnfs_no_layout cpu_to_be32(NFS4ERR_PNFS_NO_LAYOUT)
241#define nfserr_not_only_op cpu_to_be32(NFS4ERR_NOT_ONLY_OP)
242#define nfserr_wrong_cred cpu_to_be32(NFS4ERR_WRONG_CRED)
243#define nfserr_wrong_type cpu_to_be32(NFS4ERR_WRONG_TYPE)
244#define nfserr_dirdeleg_unavail cpu_to_be32(NFS4ERR_DIRDELEG_UNAVAIL)
245#define nfserr_reject_deleg cpu_to_be32(NFS4ERR_REJECT_DELEG)
246#define nfserr_returnconflict cpu_to_be32(NFS4ERR_RETURNCONFLICT)
247#define nfserr_deleg_revoked cpu_to_be32(NFS4ERR_DELEG_REVOKED)
248
249/* error codes for internal use */
250/* if a request fails due to kmalloc failure, it gets dropped.
251 * Client should resend eventually
252 */
253#define nfserr_dropit cpu_to_be32(30000)
254/* end-of-file indicator in readdir */
255#define nfserr_eof cpu_to_be32(30001)
256/* replay detected */
257#define nfserr_replay_me cpu_to_be32(11001)
258/* nfs41 replay detected */
259#define nfserr_replay_cache cpu_to_be32(11002)
260
261/* Check for dir entries '.' and '..' */
262#define isdotent(n, l) (l < 3 && n[0] == '.' && (l == 1 || n[1] == '.'))
263
264/*
265 * Time of server startup
266 */
267extern struct timeval nfssvc_boot;
268
269#ifdef CONFIG_NFSD_V4
270
271extern time_t nfsd4_lease;
272extern time_t nfsd4_grace;
273
274/* before processing a COMPOUND operation, we have to check that there
275 * is enough space in the buffer for XDR encode to succeed. otherwise,
276 * we might process an operation with side effects, and be unable to
277 * tell the client that the operation succeeded.
278 *
279 * COMPOUND_SLACK_SPACE - this is the minimum bytes of buffer space
280 * needed to encode an "ordinary" _successful_ operation. (GETATTR,
281 * READ, READDIR, and READLINK have their own buffer checks.) if we
282 * fall below this level, we fail the next operation with NFS4ERR_RESOURCE.
283 *
284 * COMPOUND_ERR_SLACK_SPACE - this is the minimum bytes of buffer space
285 * needed to encode an operation which has failed with NFS4ERR_RESOURCE.
286 * care is taken to ensure that we never fall below this level for any
287 * reason.
288 */
289#define COMPOUND_SLACK_SPACE 140 /* OP_GETFH */
290#define COMPOUND_ERR_SLACK_SPACE 12 /* OP_SETATTR */
291
292#define NFSD_LAUNDROMAT_MINTIMEOUT 1 /* seconds */
293
294/*
295 * The following attributes are currently not supported by the NFSv4 server:
296 * ARCHIVE (deprecated anyway)
297 * HIDDEN (unlikely to be supported any time soon)
298 * MIMETYPE (unlikely to be supported any time soon)
299 * QUOTA_* (will be supported in a forthcoming patch)
300 * SYSTEM (unlikely to be supported any time soon)
301 * TIME_BACKUP (unlikely to be supported any time soon)
302 * TIME_CREATE (unlikely to be supported any time soon)
303 */
304#define NFSD4_SUPPORTED_ATTRS_WORD0 \
305(FATTR4_WORD0_SUPPORTED_ATTRS | FATTR4_WORD0_TYPE | FATTR4_WORD0_FH_EXPIRE_TYPE \
306 | FATTR4_WORD0_CHANGE | FATTR4_WORD0_SIZE | FATTR4_WORD0_LINK_SUPPORT \
307 | FATTR4_WORD0_SYMLINK_SUPPORT | FATTR4_WORD0_NAMED_ATTR | FATTR4_WORD0_FSID \
308 | FATTR4_WORD0_UNIQUE_HANDLES | FATTR4_WORD0_LEASE_TIME | FATTR4_WORD0_RDATTR_ERROR \
309 | FATTR4_WORD0_ACLSUPPORT | FATTR4_WORD0_CANSETTIME | FATTR4_WORD0_CASE_INSENSITIVE \
310 | FATTR4_WORD0_CASE_PRESERVING | FATTR4_WORD0_CHOWN_RESTRICTED \
311 | FATTR4_WORD0_FILEHANDLE | FATTR4_WORD0_FILEID | FATTR4_WORD0_FILES_AVAIL \
312 | FATTR4_WORD0_FILES_FREE | FATTR4_WORD0_FILES_TOTAL | FATTR4_WORD0_FS_LOCATIONS | FATTR4_WORD0_HOMOGENEOUS \
313 | FATTR4_WORD0_MAXFILESIZE | FATTR4_WORD0_MAXLINK | FATTR4_WORD0_MAXNAME \
314 | FATTR4_WORD0_MAXREAD | FATTR4_WORD0_MAXWRITE | FATTR4_WORD0_ACL)
315
316#define NFSD4_SUPPORTED_ATTRS_WORD1 \
317(FATTR4_WORD1_MODE | FATTR4_WORD1_NO_TRUNC | FATTR4_WORD1_NUMLINKS \
318 | FATTR4_WORD1_OWNER | FATTR4_WORD1_OWNER_GROUP | FATTR4_WORD1_RAWDEV \
319 | FATTR4_WORD1_SPACE_AVAIL | FATTR4_WORD1_SPACE_FREE | FATTR4_WORD1_SPACE_TOTAL \
320 | FATTR4_WORD1_SPACE_USED | FATTR4_WORD1_TIME_ACCESS | FATTR4_WORD1_TIME_ACCESS_SET \
321 | FATTR4_WORD1_TIME_DELTA | FATTR4_WORD1_TIME_METADATA \
322 | FATTR4_WORD1_TIME_MODIFY | FATTR4_WORD1_TIME_MODIFY_SET | FATTR4_WORD1_MOUNTED_ON_FILEID)
323
324#define NFSD4_SUPPORTED_ATTRS_WORD2 0
325
326#define NFSD4_1_SUPPORTED_ATTRS_WORD0 \
327 NFSD4_SUPPORTED_ATTRS_WORD0
328
329#define NFSD4_1_SUPPORTED_ATTRS_WORD1 \
330 NFSD4_SUPPORTED_ATTRS_WORD1
331
332#define NFSD4_1_SUPPORTED_ATTRS_WORD2 \
333 (NFSD4_SUPPORTED_ATTRS_WORD2 | FATTR4_WORD2_SUPPATTR_EXCLCREAT)
334
335static inline u32 nfsd_suppattrs0(u32 minorversion)
336{
337 return minorversion ? NFSD4_1_SUPPORTED_ATTRS_WORD0
338 : NFSD4_SUPPORTED_ATTRS_WORD0;
339}
340
341static inline u32 nfsd_suppattrs1(u32 minorversion)
342{
343 return minorversion ? NFSD4_1_SUPPORTED_ATTRS_WORD1
344 : NFSD4_SUPPORTED_ATTRS_WORD1;
345}
346
347static inline u32 nfsd_suppattrs2(u32 minorversion)
348{
349 return minorversion ? NFSD4_1_SUPPORTED_ATTRS_WORD2
350 : NFSD4_SUPPORTED_ATTRS_WORD2;
351}
352
353/* These will return ERR_INVAL if specified in GETATTR or READDIR. */
354#define NFSD_WRITEONLY_ATTRS_WORD1 \
355 (FATTR4_WORD1_TIME_ACCESS_SET | FATTR4_WORD1_TIME_MODIFY_SET)
356
357/* These are the only attrs allowed in CREATE/OPEN/SETATTR. */
358#define NFSD_WRITEABLE_ATTRS_WORD0 \
359 (FATTR4_WORD0_SIZE | FATTR4_WORD0_ACL)
360#define NFSD_WRITEABLE_ATTRS_WORD1 \
361 (FATTR4_WORD1_MODE | FATTR4_WORD1_OWNER | FATTR4_WORD1_OWNER_GROUP \
362 | FATTR4_WORD1_TIME_ACCESS_SET | FATTR4_WORD1_TIME_MODIFY_SET)
363#define NFSD_WRITEABLE_ATTRS_WORD2 0
364
365#define NFSD_SUPPATTR_EXCLCREAT_WORD0 \
366 NFSD_WRITEABLE_ATTRS_WORD0
367/*
368 * we currently store the exclusive create verifier in the v_{a,m}time
369 * attributes so the client can't set these at create time using EXCLUSIVE4_1
370 */
371#define NFSD_SUPPATTR_EXCLCREAT_WORD1 \
372 (NFSD_WRITEABLE_ATTRS_WORD1 & \
373 ~(FATTR4_WORD1_TIME_ACCESS_SET | FATTR4_WORD1_TIME_MODIFY_SET))
374#define NFSD_SUPPATTR_EXCLCREAT_WORD2 \
375 NFSD_WRITEABLE_ATTRS_WORD2
376
377extern int nfsd4_is_junction(struct dentry *dentry);
378extern int register_cld_notifier(void);
379extern void unregister_cld_notifier(void);
380#else /* CONFIG_NFSD_V4 */
381static inline int nfsd4_is_junction(struct dentry *dentry)
382{
383 return 0;
384}
385
386#define register_cld_notifier() 0
387#define unregister_cld_notifier() do { } while(0)
388
389#endif /* CONFIG_NFSD_V4 */
390
391#endif /* LINUX_NFSD_NFSD_H */
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 1
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 u32 nfsd_supported_minorversion;
57extern struct mutex nfsd_mutex;
58extern struct svc_serv *nfsd_serv;
59extern spinlock_t nfsd_drc_lock;
60extern unsigned int nfsd_drc_max_mem;
61extern unsigned int nfsd_drc_mem_used;
62
63extern const struct seq_operations nfs_exports_op;
64
65/*
66 * Function prototypes.
67 */
68int nfsd_svc(unsigned short port, int nrservs);
69int nfsd_dispatch(struct svc_rqst *rqstp, __be32 *statp);
70
71int nfsd_nrthreads(void);
72int nfsd_nrpools(void);
73int nfsd_get_nrthreads(int n, int *);
74int nfsd_set_nrthreads(int n, int *);
75
76static inline void nfsd_destroy(struct net *net)
77{
78 int destroy = (nfsd_serv->sv_nrthreads == 1);
79
80 if (destroy)
81 svc_shutdown_net(nfsd_serv, net);
82 svc_destroy(nfsd_serv);
83 if (destroy)
84 nfsd_serv = NULL;
85}
86
87#if defined(CONFIG_NFSD_V2_ACL) || defined(CONFIG_NFSD_V3_ACL)
88#ifdef CONFIG_NFSD_V2_ACL
89extern struct svc_version nfsd_acl_version2;
90#else
91#define nfsd_acl_version2 NULL
92#endif
93#ifdef CONFIG_NFSD_V3_ACL
94extern struct svc_version nfsd_acl_version3;
95#else
96#define nfsd_acl_version3 NULL
97#endif
98#endif
99
100enum vers_op {NFSD_SET, NFSD_CLEAR, NFSD_TEST, NFSD_AVAIL };
101int nfsd_vers(int vers, enum vers_op change);
102int nfsd_minorversion(u32 minorversion, enum vers_op change);
103void nfsd_reset_versions(void);
104int nfsd_create_serv(void);
105
106extern int nfsd_max_blksize;
107
108static inline int nfsd_v4client(struct svc_rqst *rq)
109{
110 return rq->rq_prog == NFS_PROGRAM && rq->rq_vers == 4;
111}
112
113/*
114 * NFSv4 State
115 */
116#ifdef CONFIG_NFSD_V4
117extern unsigned int max_delegations;
118void nfs4_state_init(void);
119int nfsd4_init_slabs(void);
120void nfsd4_free_slabs(void);
121int nfs4_state_start(void);
122void nfs4_state_shutdown(void);
123void nfs4_reset_lease(time_t leasetime);
124int nfs4_reset_recoverydir(char *recdir);
125#else
126static inline void nfs4_state_init(void) { }
127static inline int nfsd4_init_slabs(void) { return 0; }
128static inline void nfsd4_free_slabs(void) { }
129static inline int nfs4_state_start(void) { return 0; }
130static inline void nfs4_state_shutdown(void) { }
131static inline void nfs4_reset_lease(time_t leasetime) { }
132static inline int nfs4_reset_recoverydir(char *recdir) { return 0; }
133#endif
134
135/*
136 * lockd binding
137 */
138void nfsd_lockd_init(void);
139void nfsd_lockd_shutdown(void);
140
141
142/*
143 * These macros provide pre-xdr'ed values for faster operation.
144 */
145#define nfs_ok cpu_to_be32(NFS_OK)
146#define nfserr_perm cpu_to_be32(NFSERR_PERM)
147#define nfserr_noent cpu_to_be32(NFSERR_NOENT)
148#define nfserr_io cpu_to_be32(NFSERR_IO)
149#define nfserr_nxio cpu_to_be32(NFSERR_NXIO)
150#define nfserr_eagain cpu_to_be32(NFSERR_EAGAIN)
151#define nfserr_acces cpu_to_be32(NFSERR_ACCES)
152#define nfserr_exist cpu_to_be32(NFSERR_EXIST)
153#define nfserr_xdev cpu_to_be32(NFSERR_XDEV)
154#define nfserr_nodev cpu_to_be32(NFSERR_NODEV)
155#define nfserr_notdir cpu_to_be32(NFSERR_NOTDIR)
156#define nfserr_isdir cpu_to_be32(NFSERR_ISDIR)
157#define nfserr_inval cpu_to_be32(NFSERR_INVAL)
158#define nfserr_fbig cpu_to_be32(NFSERR_FBIG)
159#define nfserr_nospc cpu_to_be32(NFSERR_NOSPC)
160#define nfserr_rofs cpu_to_be32(NFSERR_ROFS)
161#define nfserr_mlink cpu_to_be32(NFSERR_MLINK)
162#define nfserr_opnotsupp cpu_to_be32(NFSERR_OPNOTSUPP)
163#define nfserr_nametoolong cpu_to_be32(NFSERR_NAMETOOLONG)
164#define nfserr_notempty cpu_to_be32(NFSERR_NOTEMPTY)
165#define nfserr_dquot cpu_to_be32(NFSERR_DQUOT)
166#define nfserr_stale cpu_to_be32(NFSERR_STALE)
167#define nfserr_remote cpu_to_be32(NFSERR_REMOTE)
168#define nfserr_wflush cpu_to_be32(NFSERR_WFLUSH)
169#define nfserr_badhandle cpu_to_be32(NFSERR_BADHANDLE)
170#define nfserr_notsync cpu_to_be32(NFSERR_NOT_SYNC)
171#define nfserr_badcookie cpu_to_be32(NFSERR_BAD_COOKIE)
172#define nfserr_notsupp cpu_to_be32(NFSERR_NOTSUPP)
173#define nfserr_toosmall cpu_to_be32(NFSERR_TOOSMALL)
174#define nfserr_serverfault cpu_to_be32(NFSERR_SERVERFAULT)
175#define nfserr_badtype cpu_to_be32(NFSERR_BADTYPE)
176#define nfserr_jukebox cpu_to_be32(NFSERR_JUKEBOX)
177#define nfserr_denied cpu_to_be32(NFSERR_DENIED)
178#define nfserr_deadlock cpu_to_be32(NFSERR_DEADLOCK)
179#define nfserr_expired cpu_to_be32(NFSERR_EXPIRED)
180#define nfserr_bad_cookie cpu_to_be32(NFSERR_BAD_COOKIE)
181#define nfserr_same cpu_to_be32(NFSERR_SAME)
182#define nfserr_clid_inuse cpu_to_be32(NFSERR_CLID_INUSE)
183#define nfserr_stale_clientid cpu_to_be32(NFSERR_STALE_CLIENTID)
184#define nfserr_resource cpu_to_be32(NFSERR_RESOURCE)
185#define nfserr_moved cpu_to_be32(NFSERR_MOVED)
186#define nfserr_nofilehandle cpu_to_be32(NFSERR_NOFILEHANDLE)
187#define nfserr_minor_vers_mismatch cpu_to_be32(NFSERR_MINOR_VERS_MISMATCH)
188#define nfserr_share_denied cpu_to_be32(NFSERR_SHARE_DENIED)
189#define nfserr_stale_stateid cpu_to_be32(NFSERR_STALE_STATEID)
190#define nfserr_old_stateid cpu_to_be32(NFSERR_OLD_STATEID)
191#define nfserr_bad_stateid cpu_to_be32(NFSERR_BAD_STATEID)
192#define nfserr_bad_seqid cpu_to_be32(NFSERR_BAD_SEQID)
193#define nfserr_symlink cpu_to_be32(NFSERR_SYMLINK)
194#define nfserr_not_same cpu_to_be32(NFSERR_NOT_SAME)
195#define nfserr_lock_range cpu_to_be32(NFSERR_LOCK_RANGE)
196#define nfserr_restorefh cpu_to_be32(NFSERR_RESTOREFH)
197#define nfserr_attrnotsupp cpu_to_be32(NFSERR_ATTRNOTSUPP)
198#define nfserr_bad_xdr cpu_to_be32(NFSERR_BAD_XDR)
199#define nfserr_openmode cpu_to_be32(NFSERR_OPENMODE)
200#define nfserr_badowner cpu_to_be32(NFSERR_BADOWNER)
201#define nfserr_locks_held cpu_to_be32(NFSERR_LOCKS_HELD)
202#define nfserr_op_illegal cpu_to_be32(NFSERR_OP_ILLEGAL)
203#define nfserr_grace cpu_to_be32(NFSERR_GRACE)
204#define nfserr_no_grace cpu_to_be32(NFSERR_NO_GRACE)
205#define nfserr_reclaim_bad cpu_to_be32(NFSERR_RECLAIM_BAD)
206#define nfserr_badname cpu_to_be32(NFSERR_BADNAME)
207#define nfserr_cb_path_down cpu_to_be32(NFSERR_CB_PATH_DOWN)
208#define nfserr_locked cpu_to_be32(NFSERR_LOCKED)
209#define nfserr_wrongsec cpu_to_be32(NFSERR_WRONGSEC)
210#define nfserr_badiomode cpu_to_be32(NFS4ERR_BADIOMODE)
211#define nfserr_badlayout cpu_to_be32(NFS4ERR_BADLAYOUT)
212#define nfserr_bad_session_digest cpu_to_be32(NFS4ERR_BAD_SESSION_DIGEST)
213#define nfserr_badsession cpu_to_be32(NFS4ERR_BADSESSION)
214#define nfserr_badslot cpu_to_be32(NFS4ERR_BADSLOT)
215#define nfserr_complete_already cpu_to_be32(NFS4ERR_COMPLETE_ALREADY)
216#define nfserr_conn_not_bound_to_session cpu_to_be32(NFS4ERR_CONN_NOT_BOUND_TO_SESSION)
217#define nfserr_deleg_already_wanted cpu_to_be32(NFS4ERR_DELEG_ALREADY_WANTED)
218#define nfserr_back_chan_busy cpu_to_be32(NFS4ERR_BACK_CHAN_BUSY)
219#define nfserr_layouttrylater cpu_to_be32(NFS4ERR_LAYOUTTRYLATER)
220#define nfserr_layoutunavailable cpu_to_be32(NFS4ERR_LAYOUTUNAVAILABLE)
221#define nfserr_nomatching_layout cpu_to_be32(NFS4ERR_NOMATCHING_LAYOUT)
222#define nfserr_recallconflict cpu_to_be32(NFS4ERR_RECALLCONFLICT)
223#define nfserr_unknown_layouttype cpu_to_be32(NFS4ERR_UNKNOWN_LAYOUTTYPE)
224#define nfserr_seq_misordered cpu_to_be32(NFS4ERR_SEQ_MISORDERED)
225#define nfserr_sequence_pos cpu_to_be32(NFS4ERR_SEQUENCE_POS)
226#define nfserr_req_too_big cpu_to_be32(NFS4ERR_REQ_TOO_BIG)
227#define nfserr_rep_too_big cpu_to_be32(NFS4ERR_REP_TOO_BIG)
228#define nfserr_rep_too_big_to_cache cpu_to_be32(NFS4ERR_REP_TOO_BIG_TO_CACHE)
229#define nfserr_retry_uncached_rep cpu_to_be32(NFS4ERR_RETRY_UNCACHED_REP)
230#define nfserr_unsafe_compound cpu_to_be32(NFS4ERR_UNSAFE_COMPOUND)
231#define nfserr_too_many_ops cpu_to_be32(NFS4ERR_TOO_MANY_OPS)
232#define nfserr_op_not_in_session cpu_to_be32(NFS4ERR_OP_NOT_IN_SESSION)
233#define nfserr_hash_alg_unsupp cpu_to_be32(NFS4ERR_HASH_ALG_UNSUPP)
234#define nfserr_clientid_busy cpu_to_be32(NFS4ERR_CLIENTID_BUSY)
235#define nfserr_pnfs_io_hole cpu_to_be32(NFS4ERR_PNFS_IO_HOLE)
236#define nfserr_seq_false_retry cpu_to_be32(NFS4ERR_SEQ_FALSE_RETRY)
237#define nfserr_bad_high_slot cpu_to_be32(NFS4ERR_BAD_HIGH_SLOT)
238#define nfserr_deadsession cpu_to_be32(NFS4ERR_DEADSESSION)
239#define nfserr_encr_alg_unsupp cpu_to_be32(NFS4ERR_ENCR_ALG_UNSUPP)
240#define nfserr_pnfs_no_layout cpu_to_be32(NFS4ERR_PNFS_NO_LAYOUT)
241#define nfserr_not_only_op cpu_to_be32(NFS4ERR_NOT_ONLY_OP)
242#define nfserr_wrong_cred cpu_to_be32(NFS4ERR_WRONG_CRED)
243#define nfserr_wrong_type cpu_to_be32(NFS4ERR_WRONG_TYPE)
244#define nfserr_dirdeleg_unavail cpu_to_be32(NFS4ERR_DIRDELEG_UNAVAIL)
245#define nfserr_reject_deleg cpu_to_be32(NFS4ERR_REJECT_DELEG)
246#define nfserr_returnconflict cpu_to_be32(NFS4ERR_RETURNCONFLICT)
247#define nfserr_deleg_revoked cpu_to_be32(NFS4ERR_DELEG_REVOKED)
248
249/* error codes for internal use */
250/* if a request fails due to kmalloc failure, it gets dropped.
251 * Client should resend eventually
252 */
253#define nfserr_dropit cpu_to_be32(30000)
254/* end-of-file indicator in readdir */
255#define nfserr_eof cpu_to_be32(30001)
256/* replay detected */
257#define nfserr_replay_me cpu_to_be32(11001)
258/* nfs41 replay detected */
259#define nfserr_replay_cache cpu_to_be32(11002)
260
261/* Check for dir entries '.' and '..' */
262#define isdotent(n, l) (l < 3 && n[0] == '.' && (l == 1 || n[1] == '.'))
263
264/*
265 * Time of server startup
266 */
267extern struct timeval nfssvc_boot;
268
269#ifdef CONFIG_NFSD_V4
270
271extern time_t nfsd4_lease;
272extern time_t nfsd4_grace;
273
274/* before processing a COMPOUND operation, we have to check that there
275 * is enough space in the buffer for XDR encode to succeed. otherwise,
276 * we might process an operation with side effects, and be unable to
277 * tell the client that the operation succeeded.
278 *
279 * COMPOUND_SLACK_SPACE - this is the minimum bytes of buffer space
280 * needed to encode an "ordinary" _successful_ operation. (GETATTR,
281 * READ, READDIR, and READLINK have their own buffer checks.) if we
282 * fall below this level, we fail the next operation with NFS4ERR_RESOURCE.
283 *
284 * COMPOUND_ERR_SLACK_SPACE - this is the minimum bytes of buffer space
285 * needed to encode an operation which has failed with NFS4ERR_RESOURCE.
286 * care is taken to ensure that we never fall below this level for any
287 * reason.
288 */
289#define COMPOUND_SLACK_SPACE 140 /* OP_GETFH */
290#define COMPOUND_ERR_SLACK_SPACE 12 /* OP_SETATTR */
291
292#define NFSD_LAUNDROMAT_MINTIMEOUT 1 /* seconds */
293
294/*
295 * The following attributes are currently not supported by the NFSv4 server:
296 * ARCHIVE (deprecated anyway)
297 * HIDDEN (unlikely to be supported any time soon)
298 * MIMETYPE (unlikely to be supported any time soon)
299 * QUOTA_* (will be supported in a forthcoming patch)
300 * SYSTEM (unlikely to be supported any time soon)
301 * TIME_BACKUP (unlikely to be supported any time soon)
302 * TIME_CREATE (unlikely to be supported any time soon)
303 */
304#define NFSD4_SUPPORTED_ATTRS_WORD0 \
305(FATTR4_WORD0_SUPPORTED_ATTRS | FATTR4_WORD0_TYPE | FATTR4_WORD0_FH_EXPIRE_TYPE \
306 | FATTR4_WORD0_CHANGE | FATTR4_WORD0_SIZE | FATTR4_WORD0_LINK_SUPPORT \
307 | FATTR4_WORD0_SYMLINK_SUPPORT | FATTR4_WORD0_NAMED_ATTR | FATTR4_WORD0_FSID \
308 | FATTR4_WORD0_UNIQUE_HANDLES | FATTR4_WORD0_LEASE_TIME | FATTR4_WORD0_RDATTR_ERROR \
309 | FATTR4_WORD0_ACLSUPPORT | FATTR4_WORD0_CANSETTIME | FATTR4_WORD0_CASE_INSENSITIVE \
310 | FATTR4_WORD0_CASE_PRESERVING | FATTR4_WORD0_CHOWN_RESTRICTED \
311 | FATTR4_WORD0_FILEHANDLE | FATTR4_WORD0_FILEID | FATTR4_WORD0_FILES_AVAIL \
312 | FATTR4_WORD0_FILES_FREE | FATTR4_WORD0_FILES_TOTAL | FATTR4_WORD0_FS_LOCATIONS | FATTR4_WORD0_HOMOGENEOUS \
313 | FATTR4_WORD0_MAXFILESIZE | FATTR4_WORD0_MAXLINK | FATTR4_WORD0_MAXNAME \
314 | FATTR4_WORD0_MAXREAD | FATTR4_WORD0_MAXWRITE | FATTR4_WORD0_ACL)
315
316#define NFSD4_SUPPORTED_ATTRS_WORD1 \
317(FATTR4_WORD1_MODE | FATTR4_WORD1_NO_TRUNC | FATTR4_WORD1_NUMLINKS \
318 | FATTR4_WORD1_OWNER | FATTR4_WORD1_OWNER_GROUP | FATTR4_WORD1_RAWDEV \
319 | FATTR4_WORD1_SPACE_AVAIL | FATTR4_WORD1_SPACE_FREE | FATTR4_WORD1_SPACE_TOTAL \
320 | FATTR4_WORD1_SPACE_USED | FATTR4_WORD1_TIME_ACCESS | FATTR4_WORD1_TIME_ACCESS_SET \
321 | FATTR4_WORD1_TIME_DELTA | FATTR4_WORD1_TIME_METADATA \
322 | FATTR4_WORD1_TIME_MODIFY | FATTR4_WORD1_TIME_MODIFY_SET | FATTR4_WORD1_MOUNTED_ON_FILEID)
323
324#define NFSD4_SUPPORTED_ATTRS_WORD2 0
325
326#define NFSD4_1_SUPPORTED_ATTRS_WORD0 \
327 NFSD4_SUPPORTED_ATTRS_WORD0
328
329#define NFSD4_1_SUPPORTED_ATTRS_WORD1 \
330 NFSD4_SUPPORTED_ATTRS_WORD1
331
332#define NFSD4_1_SUPPORTED_ATTRS_WORD2 \
333 (NFSD4_SUPPORTED_ATTRS_WORD2 | FATTR4_WORD2_SUPPATTR_EXCLCREAT)
334
335static inline u32 nfsd_suppattrs0(u32 minorversion)
336{
337 return minorversion ? NFSD4_1_SUPPORTED_ATTRS_WORD0
338 : NFSD4_SUPPORTED_ATTRS_WORD0;
339}
340
341static inline u32 nfsd_suppattrs1(u32 minorversion)
342{
343 return minorversion ? NFSD4_1_SUPPORTED_ATTRS_WORD1
344 : NFSD4_SUPPORTED_ATTRS_WORD1;
345}
346
347static inline u32 nfsd_suppattrs2(u32 minorversion)
348{
349 return minorversion ? NFSD4_1_SUPPORTED_ATTRS_WORD2
350 : NFSD4_SUPPORTED_ATTRS_WORD2;
351}
352
353/* These will return ERR_INVAL if specified in GETATTR or READDIR. */
354#define NFSD_WRITEONLY_ATTRS_WORD1 \
355 (FATTR4_WORD1_TIME_ACCESS_SET | FATTR4_WORD1_TIME_MODIFY_SET)
356
357/* These are the only attrs allowed in CREATE/OPEN/SETATTR. */
358#define NFSD_WRITEABLE_ATTRS_WORD0 \
359 (FATTR4_WORD0_SIZE | FATTR4_WORD0_ACL)
360#define NFSD_WRITEABLE_ATTRS_WORD1 \
361 (FATTR4_WORD1_MODE | FATTR4_WORD1_OWNER | FATTR4_WORD1_OWNER_GROUP \
362 | FATTR4_WORD1_TIME_ACCESS_SET | FATTR4_WORD1_TIME_MODIFY_SET)
363#define NFSD_WRITEABLE_ATTRS_WORD2 0
364
365#define NFSD_SUPPATTR_EXCLCREAT_WORD0 \
366 NFSD_WRITEABLE_ATTRS_WORD0
367/*
368 * we currently store the exclusive create verifier in the v_{a,m}time
369 * attributes so the client can't set these at create time using EXCLUSIVE4_1
370 */
371#define NFSD_SUPPATTR_EXCLCREAT_WORD1 \
372 (NFSD_WRITEABLE_ATTRS_WORD1 & \
373 ~(FATTR4_WORD1_TIME_ACCESS_SET | FATTR4_WORD1_TIME_MODIFY_SET))
374#define NFSD_SUPPATTR_EXCLCREAT_WORD2 \
375 NFSD_WRITEABLE_ATTRS_WORD2
376
377extern int nfsd4_is_junction(struct dentry *dentry);
378extern int register_cld_notifier(void);
379extern void unregister_cld_notifier(void);
380#else /* CONFIG_NFSD_V4 */
381static inline int nfsd4_is_junction(struct dentry *dentry)
382{
383 return 0;
384}
385
386#define register_cld_notifier() 0
387#define unregister_cld_notifier() do { } while(0)
388
389#endif /* CONFIG_NFSD_V4 */
390
391#endif /* LINUX_NFSD_NFSD_H */