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/svc.h>
19 #include <linux/sunrpc/msg_prot.h>
20
21 #include <uapi/linux/nfsd/debug.h>
22
23 #include "stats.h"
24 #include "export.h"
25
26 #undef ifdebug
27 #ifdef CONFIG_SUNRPC_DEBUG
28 # define ifdebug(flag) if (nfsd_debug & NFSDDBG_##flag)
29 #else
30 # define ifdebug(flag) if (0)
31 #endif
32
33 /*
34 * nfsd version
35 */
36 #define NFSD_SUPPORTED_MINOR_VERSION 2
37 /*
38 * Maximum blocksizes supported by daemon under various circumstances.
39 */
40 #define NFSSVC_MAXBLKSIZE RPCSVC_MAXPAYLOAD
41 /* NFSv2 is limited by the protocol specification, see RFC 1094 */
42 #define NFSSVC_MAXBLKSIZE_V2 (8*1024)
43
44
45 /*
46 * Largest number of bytes we need to allocate for an NFS
47 * call or reply. Used to control buffer sizes. We use
48 * the length of v3 WRITE, READDIR and READDIR replies
49 * which are an RPC header, up to 26 XDR units of reply
50 * data, and some page data.
51 *
52 * Note that accuracy here doesn't matter too much as the
53 * size is rounded up to a page size when allocating space.
54 */
55 #define NFSD_BUFSIZE ((RPC_MAX_HEADER_WITH_AUTH+26)*XDR_UNIT + NFSSVC_MAXBLKSIZE)
56
57 struct readdir_cd {
58 __be32 err; /* 0, nfserr, or nfserr_eof */
59 };
60
61
62 extern struct svc_program nfsd_program;
63 extern struct svc_version nfsd_version2, nfsd_version3,
64 nfsd_version4;
65 extern struct mutex nfsd_mutex;
66 extern spinlock_t nfsd_drc_lock;
67 extern unsigned long nfsd_drc_max_mem;
68 extern unsigned long nfsd_drc_mem_used;
69
70 extern const struct seq_operations nfs_exports_op;
71
72 /*
73 * Function prototypes.
74 */
75 int nfsd_svc(int nrservs, struct net *net);
76 int nfsd_dispatch(struct svc_rqst *rqstp, __be32 *statp);
77
78 int nfsd_nrthreads(struct net *);
79 int nfsd_nrpools(struct net *);
80 int nfsd_get_nrthreads(int n, int *, struct net *);
81 int nfsd_set_nrthreads(int n, int *, struct net *);
82 int nfsd_pool_stats_open(struct inode *, struct file *);
83 int nfsd_pool_stats_release(struct inode *, struct file *);
84
85 void nfsd_destroy(struct net *net);
86
87 #if defined(CONFIG_NFSD_V2_ACL) || defined(CONFIG_NFSD_V3_ACL)
88 #ifdef CONFIG_NFSD_V2_ACL
89 extern struct svc_version nfsd_acl_version2;
90 #else
91 #define nfsd_acl_version2 NULL
92 #endif
93 #ifdef CONFIG_NFSD_V3_ACL
94 extern struct svc_version nfsd_acl_version3;
95 #else
96 #define nfsd_acl_version3 NULL
97 #endif
98 #endif
99
100 enum vers_op {NFSD_SET, NFSD_CLEAR, NFSD_TEST, NFSD_AVAIL };
101 int nfsd_vers(int vers, enum vers_op change);
102 int nfsd_minorversion(u32 minorversion, enum vers_op change);
103 void nfsd_reset_versions(void);
104 int nfsd_create_serv(struct net *net);
105
106 extern int nfsd_max_blksize;
107
nfsd_v4client(struct svc_rqst * rq)108 static 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
117 extern unsigned long max_delegations;
118 int nfsd4_init_slabs(void);
119 void nfsd4_free_slabs(void);
120 int nfs4_state_start(void);
121 int nfs4_state_start_net(struct net *net);
122 void nfs4_state_shutdown(void);
123 void nfs4_state_shutdown_net(struct net *net);
124 void nfs4_reset_lease(time_t leasetime);
125 int nfs4_reset_recoverydir(char *recdir);
126 char * nfs4_recoverydir(void);
127 #else
nfsd4_init_slabs(void)128 static inline int nfsd4_init_slabs(void) { return 0; }
nfsd4_free_slabs(void)129 static inline void nfsd4_free_slabs(void) { }
nfs4_state_start(void)130 static inline int nfs4_state_start(void) { return 0; }
nfs4_state_start_net(struct net * net)131 static inline int nfs4_state_start_net(struct net *net) { return 0; }
nfs4_state_shutdown(void)132 static inline void nfs4_state_shutdown(void) { }
nfs4_state_shutdown_net(struct net * net)133 static inline void nfs4_state_shutdown_net(struct net *net) { }
nfs4_reset_lease(time_t leasetime)134 static inline void nfs4_reset_lease(time_t leasetime) { }
nfs4_reset_recoverydir(char * recdir)135 static inline int nfs4_reset_recoverydir(char *recdir) { return 0; }
nfs4_recoverydir(void)136 static inline char * nfs4_recoverydir(void) {return NULL; }
137 #endif
138
139 /*
140 * lockd binding
141 */
142 void nfsd_lockd_init(void);
143 void nfsd_lockd_shutdown(void);
144
145
146 /*
147 * These macros provide pre-xdr'ed values for faster operation.
148 */
149 #define nfs_ok cpu_to_be32(NFS_OK)
150 #define nfserr_perm cpu_to_be32(NFSERR_PERM)
151 #define nfserr_noent cpu_to_be32(NFSERR_NOENT)
152 #define nfserr_io cpu_to_be32(NFSERR_IO)
153 #define nfserr_nxio cpu_to_be32(NFSERR_NXIO)
154 #define nfserr_eagain cpu_to_be32(NFSERR_EAGAIN)
155 #define nfserr_acces cpu_to_be32(NFSERR_ACCES)
156 #define nfserr_exist cpu_to_be32(NFSERR_EXIST)
157 #define nfserr_xdev cpu_to_be32(NFSERR_XDEV)
158 #define nfserr_nodev cpu_to_be32(NFSERR_NODEV)
159 #define nfserr_notdir cpu_to_be32(NFSERR_NOTDIR)
160 #define nfserr_isdir cpu_to_be32(NFSERR_ISDIR)
161 #define nfserr_inval cpu_to_be32(NFSERR_INVAL)
162 #define nfserr_fbig cpu_to_be32(NFSERR_FBIG)
163 #define nfserr_nospc cpu_to_be32(NFSERR_NOSPC)
164 #define nfserr_rofs cpu_to_be32(NFSERR_ROFS)
165 #define nfserr_mlink cpu_to_be32(NFSERR_MLINK)
166 #define nfserr_opnotsupp cpu_to_be32(NFSERR_OPNOTSUPP)
167 #define nfserr_nametoolong cpu_to_be32(NFSERR_NAMETOOLONG)
168 #define nfserr_notempty cpu_to_be32(NFSERR_NOTEMPTY)
169 #define nfserr_dquot cpu_to_be32(NFSERR_DQUOT)
170 #define nfserr_stale cpu_to_be32(NFSERR_STALE)
171 #define nfserr_remote cpu_to_be32(NFSERR_REMOTE)
172 #define nfserr_wflush cpu_to_be32(NFSERR_WFLUSH)
173 #define nfserr_badhandle cpu_to_be32(NFSERR_BADHANDLE)
174 #define nfserr_notsync cpu_to_be32(NFSERR_NOT_SYNC)
175 #define nfserr_badcookie cpu_to_be32(NFSERR_BAD_COOKIE)
176 #define nfserr_notsupp cpu_to_be32(NFSERR_NOTSUPP)
177 #define nfserr_toosmall cpu_to_be32(NFSERR_TOOSMALL)
178 #define nfserr_serverfault cpu_to_be32(NFSERR_SERVERFAULT)
179 #define nfserr_badtype cpu_to_be32(NFSERR_BADTYPE)
180 #define nfserr_jukebox cpu_to_be32(NFSERR_JUKEBOX)
181 #define nfserr_denied cpu_to_be32(NFSERR_DENIED)
182 #define nfserr_deadlock cpu_to_be32(NFSERR_DEADLOCK)
183 #define nfserr_expired cpu_to_be32(NFSERR_EXPIRED)
184 #define nfserr_bad_cookie cpu_to_be32(NFSERR_BAD_COOKIE)
185 #define nfserr_same cpu_to_be32(NFSERR_SAME)
186 #define nfserr_clid_inuse cpu_to_be32(NFSERR_CLID_INUSE)
187 #define nfserr_stale_clientid cpu_to_be32(NFSERR_STALE_CLIENTID)
188 #define nfserr_resource cpu_to_be32(NFSERR_RESOURCE)
189 #define nfserr_moved cpu_to_be32(NFSERR_MOVED)
190 #define nfserr_nofilehandle cpu_to_be32(NFSERR_NOFILEHANDLE)
191 #define nfserr_minor_vers_mismatch cpu_to_be32(NFSERR_MINOR_VERS_MISMATCH)
192 #define nfserr_share_denied cpu_to_be32(NFSERR_SHARE_DENIED)
193 #define nfserr_stale_stateid cpu_to_be32(NFSERR_STALE_STATEID)
194 #define nfserr_old_stateid cpu_to_be32(NFSERR_OLD_STATEID)
195 #define nfserr_bad_stateid cpu_to_be32(NFSERR_BAD_STATEID)
196 #define nfserr_bad_seqid cpu_to_be32(NFSERR_BAD_SEQID)
197 #define nfserr_symlink cpu_to_be32(NFSERR_SYMLINK)
198 #define nfserr_not_same cpu_to_be32(NFSERR_NOT_SAME)
199 #define nfserr_lock_range cpu_to_be32(NFSERR_LOCK_RANGE)
200 #define nfserr_restorefh cpu_to_be32(NFSERR_RESTOREFH)
201 #define nfserr_attrnotsupp cpu_to_be32(NFSERR_ATTRNOTSUPP)
202 #define nfserr_bad_xdr cpu_to_be32(NFSERR_BAD_XDR)
203 #define nfserr_openmode cpu_to_be32(NFSERR_OPENMODE)
204 #define nfserr_badowner cpu_to_be32(NFSERR_BADOWNER)
205 #define nfserr_locks_held cpu_to_be32(NFSERR_LOCKS_HELD)
206 #define nfserr_op_illegal cpu_to_be32(NFSERR_OP_ILLEGAL)
207 #define nfserr_grace cpu_to_be32(NFSERR_GRACE)
208 #define nfserr_no_grace cpu_to_be32(NFSERR_NO_GRACE)
209 #define nfserr_reclaim_bad cpu_to_be32(NFSERR_RECLAIM_BAD)
210 #define nfserr_badname cpu_to_be32(NFSERR_BADNAME)
211 #define nfserr_cb_path_down cpu_to_be32(NFSERR_CB_PATH_DOWN)
212 #define nfserr_locked cpu_to_be32(NFSERR_LOCKED)
213 #define nfserr_wrongsec cpu_to_be32(NFSERR_WRONGSEC)
214 #define nfserr_badiomode cpu_to_be32(NFS4ERR_BADIOMODE)
215 #define nfserr_badlayout cpu_to_be32(NFS4ERR_BADLAYOUT)
216 #define nfserr_bad_session_digest cpu_to_be32(NFS4ERR_BAD_SESSION_DIGEST)
217 #define nfserr_badsession cpu_to_be32(NFS4ERR_BADSESSION)
218 #define nfserr_badslot cpu_to_be32(NFS4ERR_BADSLOT)
219 #define nfserr_complete_already cpu_to_be32(NFS4ERR_COMPLETE_ALREADY)
220 #define nfserr_conn_not_bound_to_session cpu_to_be32(NFS4ERR_CONN_NOT_BOUND_TO_SESSION)
221 #define nfserr_deleg_already_wanted cpu_to_be32(NFS4ERR_DELEG_ALREADY_WANTED)
222 #define nfserr_back_chan_busy cpu_to_be32(NFS4ERR_BACK_CHAN_BUSY)
223 #define nfserr_layouttrylater cpu_to_be32(NFS4ERR_LAYOUTTRYLATER)
224 #define nfserr_layoutunavailable cpu_to_be32(NFS4ERR_LAYOUTUNAVAILABLE)
225 #define nfserr_nomatching_layout cpu_to_be32(NFS4ERR_NOMATCHING_LAYOUT)
226 #define nfserr_recallconflict cpu_to_be32(NFS4ERR_RECALLCONFLICT)
227 #define nfserr_unknown_layouttype cpu_to_be32(NFS4ERR_UNKNOWN_LAYOUTTYPE)
228 #define nfserr_seq_misordered cpu_to_be32(NFS4ERR_SEQ_MISORDERED)
229 #define nfserr_sequence_pos cpu_to_be32(NFS4ERR_SEQUENCE_POS)
230 #define nfserr_req_too_big cpu_to_be32(NFS4ERR_REQ_TOO_BIG)
231 #define nfserr_rep_too_big cpu_to_be32(NFS4ERR_REP_TOO_BIG)
232 #define nfserr_rep_too_big_to_cache cpu_to_be32(NFS4ERR_REP_TOO_BIG_TO_CACHE)
233 #define nfserr_retry_uncached_rep cpu_to_be32(NFS4ERR_RETRY_UNCACHED_REP)
234 #define nfserr_unsafe_compound cpu_to_be32(NFS4ERR_UNSAFE_COMPOUND)
235 #define nfserr_too_many_ops cpu_to_be32(NFS4ERR_TOO_MANY_OPS)
236 #define nfserr_op_not_in_session cpu_to_be32(NFS4ERR_OP_NOT_IN_SESSION)
237 #define nfserr_hash_alg_unsupp cpu_to_be32(NFS4ERR_HASH_ALG_UNSUPP)
238 #define nfserr_clientid_busy cpu_to_be32(NFS4ERR_CLIENTID_BUSY)
239 #define nfserr_pnfs_io_hole cpu_to_be32(NFS4ERR_PNFS_IO_HOLE)
240 #define nfserr_seq_false_retry cpu_to_be32(NFS4ERR_SEQ_FALSE_RETRY)
241 #define nfserr_bad_high_slot cpu_to_be32(NFS4ERR_BAD_HIGH_SLOT)
242 #define nfserr_deadsession cpu_to_be32(NFS4ERR_DEADSESSION)
243 #define nfserr_encr_alg_unsupp cpu_to_be32(NFS4ERR_ENCR_ALG_UNSUPP)
244 #define nfserr_pnfs_no_layout cpu_to_be32(NFS4ERR_PNFS_NO_LAYOUT)
245 #define nfserr_not_only_op cpu_to_be32(NFS4ERR_NOT_ONLY_OP)
246 #define nfserr_wrong_cred cpu_to_be32(NFS4ERR_WRONG_CRED)
247 #define nfserr_wrong_type cpu_to_be32(NFS4ERR_WRONG_TYPE)
248 #define nfserr_dirdeleg_unavail cpu_to_be32(NFS4ERR_DIRDELEG_UNAVAIL)
249 #define nfserr_reject_deleg cpu_to_be32(NFS4ERR_REJECT_DELEG)
250 #define nfserr_returnconflict cpu_to_be32(NFS4ERR_RETURNCONFLICT)
251 #define nfserr_deleg_revoked cpu_to_be32(NFS4ERR_DELEG_REVOKED)
252 #define nfserr_partner_notsupp cpu_to_be32(NFS4ERR_PARTNER_NOTSUPP)
253 #define nfserr_partner_no_auth cpu_to_be32(NFS4ERR_PARTNER_NO_AUTH)
254 #define nfserr_union_notsupp cpu_to_be32(NFS4ERR_UNION_NOTSUPP)
255 #define nfserr_offload_denied cpu_to_be32(NFS4ERR_OFFLOAD_DENIED)
256 #define nfserr_wrong_lfs cpu_to_be32(NFS4ERR_WRONG_LFS)
257 #define nfserr_badlabel cpu_to_be32(NFS4ERR_BADLABEL)
258
259 /* error codes for internal use */
260 /* if a request fails due to kmalloc failure, it gets dropped.
261 * Client should resend eventually
262 */
263 #define nfserr_dropit cpu_to_be32(30000)
264 /* end-of-file indicator in readdir */
265 #define nfserr_eof cpu_to_be32(30001)
266 /* replay detected */
267 #define nfserr_replay_me cpu_to_be32(11001)
268 /* nfs41 replay detected */
269 #define nfserr_replay_cache cpu_to_be32(11002)
270
271 /* Check for dir entries '.' and '..' */
272 #define isdotent(n, l) (l < 3 && n[0] == '.' && (l == 1 || n[1] == '.'))
273
274 #ifdef CONFIG_NFSD_V4
275
276 /* before processing a COMPOUND operation, we have to check that there
277 * is enough space in the buffer for XDR encode to succeed. otherwise,
278 * we might process an operation with side effects, and be unable to
279 * tell the client that the operation succeeded.
280 *
281 * COMPOUND_SLACK_SPACE - this is the minimum bytes of buffer space
282 * needed to encode an "ordinary" _successful_ operation. (GETATTR,
283 * READ, READDIR, and READLINK have their own buffer checks.) if we
284 * fall below this level, we fail the next operation with NFS4ERR_RESOURCE.
285 *
286 * COMPOUND_ERR_SLACK_SPACE - this is the minimum bytes of buffer space
287 * needed to encode an operation which has failed with NFS4ERR_RESOURCE.
288 * care is taken to ensure that we never fall below this level for any
289 * reason.
290 */
291 #define COMPOUND_SLACK_SPACE 140 /* OP_GETFH */
292 #define COMPOUND_ERR_SLACK_SPACE 16 /* OP_SETATTR */
293
294 #define NFSD_LAUNDROMAT_MINTIMEOUT 1 /* seconds */
295
296 /*
297 * The following attributes are currently not supported by the NFSv4 server:
298 * ARCHIVE (deprecated anyway)
299 * HIDDEN (unlikely to be supported any time soon)
300 * MIMETYPE (unlikely to be supported any time soon)
301 * QUOTA_* (will be supported in a forthcoming patch)
302 * SYSTEM (unlikely to be supported any time soon)
303 * TIME_BACKUP (unlikely to be supported any time soon)
304 * TIME_CREATE (unlikely to be supported any time soon)
305 */
306 #define NFSD4_SUPPORTED_ATTRS_WORD0 \
307 (FATTR4_WORD0_SUPPORTED_ATTRS | FATTR4_WORD0_TYPE | FATTR4_WORD0_FH_EXPIRE_TYPE \
308 | FATTR4_WORD0_CHANGE | FATTR4_WORD0_SIZE | FATTR4_WORD0_LINK_SUPPORT \
309 | FATTR4_WORD0_SYMLINK_SUPPORT | FATTR4_WORD0_NAMED_ATTR | FATTR4_WORD0_FSID \
310 | FATTR4_WORD0_UNIQUE_HANDLES | FATTR4_WORD0_LEASE_TIME | FATTR4_WORD0_RDATTR_ERROR \
311 | FATTR4_WORD0_ACLSUPPORT | FATTR4_WORD0_CANSETTIME | FATTR4_WORD0_CASE_INSENSITIVE \
312 | FATTR4_WORD0_CASE_PRESERVING | FATTR4_WORD0_CHOWN_RESTRICTED \
313 | FATTR4_WORD0_FILEHANDLE | FATTR4_WORD0_FILEID | FATTR4_WORD0_FILES_AVAIL \
314 | FATTR4_WORD0_FILES_FREE | FATTR4_WORD0_FILES_TOTAL | FATTR4_WORD0_FS_LOCATIONS | FATTR4_WORD0_HOMOGENEOUS \
315 | FATTR4_WORD0_MAXFILESIZE | FATTR4_WORD0_MAXLINK | FATTR4_WORD0_MAXNAME \
316 | FATTR4_WORD0_MAXREAD | FATTR4_WORD0_MAXWRITE | FATTR4_WORD0_ACL)
317
318 #define NFSD4_SUPPORTED_ATTRS_WORD1 \
319 (FATTR4_WORD1_MODE | FATTR4_WORD1_NO_TRUNC | FATTR4_WORD1_NUMLINKS \
320 | FATTR4_WORD1_OWNER | FATTR4_WORD1_OWNER_GROUP | FATTR4_WORD1_RAWDEV \
321 | FATTR4_WORD1_SPACE_AVAIL | FATTR4_WORD1_SPACE_FREE | FATTR4_WORD1_SPACE_TOTAL \
322 | FATTR4_WORD1_SPACE_USED | FATTR4_WORD1_TIME_ACCESS | FATTR4_WORD1_TIME_ACCESS_SET \
323 | FATTR4_WORD1_TIME_DELTA | FATTR4_WORD1_TIME_METADATA \
324 | FATTR4_WORD1_TIME_MODIFY | FATTR4_WORD1_TIME_MODIFY_SET | FATTR4_WORD1_MOUNTED_ON_FILEID)
325
326 #define NFSD4_SUPPORTED_ATTRS_WORD2 0
327
328 /* 4.1 */
329 #ifdef CONFIG_NFSD_PNFS
330 #define PNFSD_SUPPORTED_ATTRS_WORD1 FATTR4_WORD1_FS_LAYOUT_TYPES
331 #define PNFSD_SUPPORTED_ATTRS_WORD2 \
332 (FATTR4_WORD2_LAYOUT_BLKSIZE | FATTR4_WORD2_LAYOUT_TYPES)
333 #else
334 #define PNFSD_SUPPORTED_ATTRS_WORD1 0
335 #define PNFSD_SUPPORTED_ATTRS_WORD2 0
336 #endif /* CONFIG_NFSD_PNFS */
337
338 #define NFSD4_1_SUPPORTED_ATTRS_WORD0 \
339 NFSD4_SUPPORTED_ATTRS_WORD0
340
341 #define NFSD4_1_SUPPORTED_ATTRS_WORD1 \
342 (NFSD4_SUPPORTED_ATTRS_WORD1 | PNFSD_SUPPORTED_ATTRS_WORD1)
343
344 #define NFSD4_1_SUPPORTED_ATTRS_WORD2 \
345 (NFSD4_SUPPORTED_ATTRS_WORD2 | PNFSD_SUPPORTED_ATTRS_WORD2 | \
346 FATTR4_WORD2_SUPPATTR_EXCLCREAT)
347
348 /* 4.2 */
349 #ifdef CONFIG_NFSD_V4_SECURITY_LABEL
350 #define NFSD4_2_SECURITY_ATTRS FATTR4_WORD2_SECURITY_LABEL
351 #else
352 #define NFSD4_2_SECURITY_ATTRS 0
353 #endif
354
355 #define NFSD4_2_SUPPORTED_ATTRS_WORD2 \
356 (NFSD4_1_SUPPORTED_ATTRS_WORD2 | \
357 NFSD4_2_SECURITY_ATTRS)
358
nfsd_suppattrs0(u32 minorversion)359 static inline u32 nfsd_suppattrs0(u32 minorversion)
360 {
361 return minorversion ? NFSD4_1_SUPPORTED_ATTRS_WORD0
362 : NFSD4_SUPPORTED_ATTRS_WORD0;
363 }
364
nfsd_suppattrs1(u32 minorversion)365 static inline u32 nfsd_suppattrs1(u32 minorversion)
366 {
367 return minorversion ? NFSD4_1_SUPPORTED_ATTRS_WORD1
368 : NFSD4_SUPPORTED_ATTRS_WORD1;
369 }
370
nfsd_suppattrs2(u32 minorversion)371 static inline u32 nfsd_suppattrs2(u32 minorversion)
372 {
373 switch (minorversion) {
374 default: return NFSD4_2_SUPPORTED_ATTRS_WORD2;
375 case 1: return NFSD4_1_SUPPORTED_ATTRS_WORD2;
376 case 0: return NFSD4_SUPPORTED_ATTRS_WORD2;
377 }
378 }
379
380 /* These will return ERR_INVAL if specified in GETATTR or READDIR. */
381 #define NFSD_WRITEONLY_ATTRS_WORD1 \
382 (FATTR4_WORD1_TIME_ACCESS_SET | FATTR4_WORD1_TIME_MODIFY_SET)
383
384 /* These are the only attrs allowed in CREATE/OPEN/SETATTR. */
385 #define NFSD_WRITEABLE_ATTRS_WORD0 \
386 (FATTR4_WORD0_SIZE | FATTR4_WORD0_ACL)
387 #define NFSD_WRITEABLE_ATTRS_WORD1 \
388 (FATTR4_WORD1_MODE | FATTR4_WORD1_OWNER | FATTR4_WORD1_OWNER_GROUP \
389 | FATTR4_WORD1_TIME_ACCESS_SET | FATTR4_WORD1_TIME_MODIFY_SET)
390 #ifdef CONFIG_NFSD_V4_SECURITY_LABEL
391 #define NFSD_WRITEABLE_ATTRS_WORD2 FATTR4_WORD2_SECURITY_LABEL
392 #else
393 #define NFSD_WRITEABLE_ATTRS_WORD2 0
394 #endif
395
396 #define NFSD_SUPPATTR_EXCLCREAT_WORD0 \
397 NFSD_WRITEABLE_ATTRS_WORD0
398 /*
399 * we currently store the exclusive create verifier in the v_{a,m}time
400 * attributes so the client can't set these at create time using EXCLUSIVE4_1
401 */
402 #define NFSD_SUPPATTR_EXCLCREAT_WORD1 \
403 (NFSD_WRITEABLE_ATTRS_WORD1 & \
404 ~(FATTR4_WORD1_TIME_ACCESS_SET | FATTR4_WORD1_TIME_MODIFY_SET))
405 #define NFSD_SUPPATTR_EXCLCREAT_WORD2 \
406 NFSD_WRITEABLE_ATTRS_WORD2
407
408 extern int nfsd4_is_junction(struct dentry *dentry);
409 extern int register_cld_notifier(void);
410 extern void unregister_cld_notifier(void);
411 #else /* CONFIG_NFSD_V4 */
nfsd4_is_junction(struct dentry * dentry)412 static inline int nfsd4_is_junction(struct dentry *dentry)
413 {
414 return 0;
415 }
416
417 #define register_cld_notifier() 0
418 #define unregister_cld_notifier() do { } while(0)
419
420 #endif /* CONFIG_NFSD_V4 */
421
422 #endif /* LINUX_NFSD_NFSD_H */
423