1 /* SPDX-License-Identifier: GPL-2.0 */
2 /*
3 * Hodge-podge collection of knfsd-related stuff.
4 * I will sort this out later.
5 *
6 * Copyright (C) 1995-1997 Olaf Kirch <okir@monad.swb.de>
7 */
8
9 #ifndef LINUX_NFSD_NFSD_H
10 #define LINUX_NFSD_NFSD_H
11
12 #include <linux/types.h>
13 #include <linux/mount.h>
14
15 #include <linux/nfs.h>
16 #include <linux/nfs2.h>
17 #include <linux/nfs3.h>
18 #include <linux/nfs4.h>
19 #include <linux/sunrpc/svc.h>
20 #include <linux/sunrpc/msg_prot.h>
21
22 #include <uapi/linux/nfsd/debug.h>
23
24 #include "stats.h"
25 #include "export.h"
26
27 #undef ifdebug
28 #ifdef CONFIG_SUNRPC_DEBUG
29 # define ifdebug(flag) if (nfsd_debug & NFSDDBG_##flag)
30 #else
31 # define ifdebug(flag) if (0)
32 #endif
33
34 /*
35 * nfsd version
36 */
37 #define NFSD_SUPPORTED_MINOR_VERSION 2
38 /*
39 * Maximum blocksizes supported by daemon under various circumstances.
40 */
41 #define NFSSVC_MAXBLKSIZE RPCSVC_MAXPAYLOAD
42 /* NFSv2 is limited by the protocol specification, see RFC 1094 */
43 #define NFSSVC_MAXBLKSIZE_V2 (8*1024)
44
45
46 /*
47 * Largest number of bytes we need to allocate for an NFS
48 * call or reply. Used to control buffer sizes. We use
49 * the length of v3 WRITE, READDIR and READDIR replies
50 * which are an RPC header, up to 26 XDR units of reply
51 * data, and some page data.
52 *
53 * Note that accuracy here doesn't matter too much as the
54 * size is rounded up to a page size when allocating space.
55 */
56 #define NFSD_BUFSIZE ((RPC_MAX_HEADER_WITH_AUTH+26)*XDR_UNIT + NFSSVC_MAXBLKSIZE)
57
58 struct readdir_cd {
59 __be32 err; /* 0, nfserr, or nfserr_eof */
60 };
61
62
63 extern struct svc_program nfsd_program;
64 extern const struct svc_version nfsd_version2, nfsd_version3,
65 nfsd_version4;
66 extern struct mutex nfsd_mutex;
67 extern spinlock_t nfsd_drc_lock;
68 extern unsigned long nfsd_drc_max_mem;
69 extern unsigned long nfsd_drc_mem_used;
70
71 extern const struct seq_operations nfs_exports_op;
72
73 /*
74 * Function prototypes.
75 */
76 int nfsd_svc(int nrservs, struct net *net);
77 int nfsd_dispatch(struct svc_rqst *rqstp, __be32 *statp);
78
79 int nfsd_nrthreads(struct net *);
80 int nfsd_nrpools(struct net *);
81 int nfsd_get_nrthreads(int n, int *, struct net *);
82 int nfsd_set_nrthreads(int n, int *, struct net *);
83 int nfsd_pool_stats_open(struct inode *, struct file *);
84 int nfsd_pool_stats_release(struct inode *, struct file *);
85
86 void nfsd_destroy(struct net *net);
87
88 #if defined(CONFIG_NFSD_V2_ACL) || defined(CONFIG_NFSD_V3_ACL)
89 #ifdef CONFIG_NFSD_V2_ACL
90 extern const struct svc_version nfsd_acl_version2;
91 #else
92 #define nfsd_acl_version2 NULL
93 #endif
94 #ifdef CONFIG_NFSD_V3_ACL
95 extern const struct svc_version nfsd_acl_version3;
96 #else
97 #define nfsd_acl_version3 NULL
98 #endif
99 #endif
100
101 enum vers_op {NFSD_SET, NFSD_CLEAR, NFSD_TEST, NFSD_AVAIL };
102 int nfsd_vers(int vers, enum vers_op change);
103 int nfsd_minorversion(u32 minorversion, enum vers_op change);
104 void nfsd_reset_versions(void);
105 int nfsd_create_serv(struct net *net);
106
107 extern int nfsd_max_blksize;
108
nfsd_v4client(struct svc_rqst * rq)109 static inline int nfsd_v4client(struct svc_rqst *rq)
110 {
111 return rq->rq_prog == NFS_PROGRAM && rq->rq_vers == 4;
112 }
113
114 /*
115 * NFSv4 State
116 */
117 #ifdef CONFIG_NFSD_V4
118 extern unsigned long max_delegations;
119 int nfsd4_init_slabs(void);
120 void nfsd4_free_slabs(void);
121 int nfs4_state_start(void);
122 int nfs4_state_start_net(struct net *net);
123 void nfs4_state_shutdown(void);
124 void nfs4_state_shutdown_net(struct net *net);
125 void nfs4_reset_lease(time_t leasetime);
126 int nfs4_reset_recoverydir(char *recdir);
127 char * nfs4_recoverydir(void);
128 bool nfsd4_spo_must_allow(struct svc_rqst *rqstp);
129 #else
nfsd4_init_slabs(void)130 static inline int nfsd4_init_slabs(void) { return 0; }
nfsd4_free_slabs(void)131 static inline void nfsd4_free_slabs(void) { }
nfs4_state_start(void)132 static inline int nfs4_state_start(void) { return 0; }
nfs4_state_start_net(struct net * net)133 static inline int nfs4_state_start_net(struct net *net) { return 0; }
nfs4_state_shutdown(void)134 static inline void nfs4_state_shutdown(void) { }
nfs4_state_shutdown_net(struct net * net)135 static inline void nfs4_state_shutdown_net(struct net *net) { }
nfs4_reset_lease(time_t leasetime)136 static inline void nfs4_reset_lease(time_t leasetime) { }
nfs4_reset_recoverydir(char * recdir)137 static inline int nfs4_reset_recoverydir(char *recdir) { return 0; }
nfs4_recoverydir(void)138 static inline char * nfs4_recoverydir(void) {return NULL; }
nfsd4_spo_must_allow(struct svc_rqst * rqstp)139 static inline bool nfsd4_spo_must_allow(struct svc_rqst *rqstp)
140 {
141 return false;
142 }
143 #endif
144
145 /*
146 * lockd binding
147 */
148 void nfsd_lockd_init(void);
149 void nfsd_lockd_shutdown(void);
150
151
152 /*
153 * These macros provide pre-xdr'ed values for faster operation.
154 */
155 #define nfs_ok cpu_to_be32(NFS_OK)
156 #define nfserr_perm cpu_to_be32(NFSERR_PERM)
157 #define nfserr_noent cpu_to_be32(NFSERR_NOENT)
158 #define nfserr_io cpu_to_be32(NFSERR_IO)
159 #define nfserr_nxio cpu_to_be32(NFSERR_NXIO)
160 #define nfserr_eagain cpu_to_be32(NFSERR_EAGAIN)
161 #define nfserr_acces cpu_to_be32(NFSERR_ACCES)
162 #define nfserr_exist cpu_to_be32(NFSERR_EXIST)
163 #define nfserr_xdev cpu_to_be32(NFSERR_XDEV)
164 #define nfserr_nodev cpu_to_be32(NFSERR_NODEV)
165 #define nfserr_notdir cpu_to_be32(NFSERR_NOTDIR)
166 #define nfserr_isdir cpu_to_be32(NFSERR_ISDIR)
167 #define nfserr_inval cpu_to_be32(NFSERR_INVAL)
168 #define nfserr_fbig cpu_to_be32(NFSERR_FBIG)
169 #define nfserr_nospc cpu_to_be32(NFSERR_NOSPC)
170 #define nfserr_rofs cpu_to_be32(NFSERR_ROFS)
171 #define nfserr_mlink cpu_to_be32(NFSERR_MLINK)
172 #define nfserr_opnotsupp cpu_to_be32(NFSERR_OPNOTSUPP)
173 #define nfserr_nametoolong cpu_to_be32(NFSERR_NAMETOOLONG)
174 #define nfserr_notempty cpu_to_be32(NFSERR_NOTEMPTY)
175 #define nfserr_dquot cpu_to_be32(NFSERR_DQUOT)
176 #define nfserr_stale cpu_to_be32(NFSERR_STALE)
177 #define nfserr_remote cpu_to_be32(NFSERR_REMOTE)
178 #define nfserr_wflush cpu_to_be32(NFSERR_WFLUSH)
179 #define nfserr_badhandle cpu_to_be32(NFSERR_BADHANDLE)
180 #define nfserr_notsync cpu_to_be32(NFSERR_NOT_SYNC)
181 #define nfserr_badcookie cpu_to_be32(NFSERR_BAD_COOKIE)
182 #define nfserr_notsupp cpu_to_be32(NFSERR_NOTSUPP)
183 #define nfserr_toosmall cpu_to_be32(NFSERR_TOOSMALL)
184 #define nfserr_serverfault cpu_to_be32(NFSERR_SERVERFAULT)
185 #define nfserr_badtype cpu_to_be32(NFSERR_BADTYPE)
186 #define nfserr_jukebox cpu_to_be32(NFSERR_JUKEBOX)
187 #define nfserr_denied cpu_to_be32(NFSERR_DENIED)
188 #define nfserr_deadlock cpu_to_be32(NFSERR_DEADLOCK)
189 #define nfserr_expired cpu_to_be32(NFSERR_EXPIRED)
190 #define nfserr_bad_cookie cpu_to_be32(NFSERR_BAD_COOKIE)
191 #define nfserr_same cpu_to_be32(NFSERR_SAME)
192 #define nfserr_clid_inuse cpu_to_be32(NFSERR_CLID_INUSE)
193 #define nfserr_stale_clientid cpu_to_be32(NFSERR_STALE_CLIENTID)
194 #define nfserr_resource cpu_to_be32(NFSERR_RESOURCE)
195 #define nfserr_moved cpu_to_be32(NFSERR_MOVED)
196 #define nfserr_nofilehandle cpu_to_be32(NFSERR_NOFILEHANDLE)
197 #define nfserr_minor_vers_mismatch cpu_to_be32(NFSERR_MINOR_VERS_MISMATCH)
198 #define nfserr_share_denied cpu_to_be32(NFSERR_SHARE_DENIED)
199 #define nfserr_stale_stateid cpu_to_be32(NFSERR_STALE_STATEID)
200 #define nfserr_old_stateid cpu_to_be32(NFSERR_OLD_STATEID)
201 #define nfserr_bad_stateid cpu_to_be32(NFSERR_BAD_STATEID)
202 #define nfserr_bad_seqid cpu_to_be32(NFSERR_BAD_SEQID)
203 #define nfserr_symlink cpu_to_be32(NFSERR_SYMLINK)
204 #define nfserr_not_same cpu_to_be32(NFSERR_NOT_SAME)
205 #define nfserr_lock_range cpu_to_be32(NFSERR_LOCK_RANGE)
206 #define nfserr_restorefh cpu_to_be32(NFSERR_RESTOREFH)
207 #define nfserr_attrnotsupp cpu_to_be32(NFSERR_ATTRNOTSUPP)
208 #define nfserr_bad_xdr cpu_to_be32(NFSERR_BAD_XDR)
209 #define nfserr_openmode cpu_to_be32(NFSERR_OPENMODE)
210 #define nfserr_badowner cpu_to_be32(NFSERR_BADOWNER)
211 #define nfserr_locks_held cpu_to_be32(NFSERR_LOCKS_HELD)
212 #define nfserr_op_illegal cpu_to_be32(NFSERR_OP_ILLEGAL)
213 #define nfserr_grace cpu_to_be32(NFSERR_GRACE)
214 #define nfserr_no_grace cpu_to_be32(NFSERR_NO_GRACE)
215 #define nfserr_reclaim_bad cpu_to_be32(NFSERR_RECLAIM_BAD)
216 #define nfserr_badname cpu_to_be32(NFSERR_BADNAME)
217 #define nfserr_cb_path_down cpu_to_be32(NFSERR_CB_PATH_DOWN)
218 #define nfserr_locked cpu_to_be32(NFSERR_LOCKED)
219 #define nfserr_wrongsec cpu_to_be32(NFSERR_WRONGSEC)
220 #define nfserr_badiomode cpu_to_be32(NFS4ERR_BADIOMODE)
221 #define nfserr_badlayout cpu_to_be32(NFS4ERR_BADLAYOUT)
222 #define nfserr_bad_session_digest cpu_to_be32(NFS4ERR_BAD_SESSION_DIGEST)
223 #define nfserr_badsession cpu_to_be32(NFS4ERR_BADSESSION)
224 #define nfserr_badslot cpu_to_be32(NFS4ERR_BADSLOT)
225 #define nfserr_complete_already cpu_to_be32(NFS4ERR_COMPLETE_ALREADY)
226 #define nfserr_conn_not_bound_to_session cpu_to_be32(NFS4ERR_CONN_NOT_BOUND_TO_SESSION)
227 #define nfserr_deleg_already_wanted cpu_to_be32(NFS4ERR_DELEG_ALREADY_WANTED)
228 #define nfserr_back_chan_busy cpu_to_be32(NFS4ERR_BACK_CHAN_BUSY)
229 #define nfserr_layouttrylater cpu_to_be32(NFS4ERR_LAYOUTTRYLATER)
230 #define nfserr_layoutunavailable cpu_to_be32(NFS4ERR_LAYOUTUNAVAILABLE)
231 #define nfserr_nomatching_layout cpu_to_be32(NFS4ERR_NOMATCHING_LAYOUT)
232 #define nfserr_recallconflict cpu_to_be32(NFS4ERR_RECALLCONFLICT)
233 #define nfserr_unknown_layouttype cpu_to_be32(NFS4ERR_UNKNOWN_LAYOUTTYPE)
234 #define nfserr_seq_misordered cpu_to_be32(NFS4ERR_SEQ_MISORDERED)
235 #define nfserr_sequence_pos cpu_to_be32(NFS4ERR_SEQUENCE_POS)
236 #define nfserr_req_too_big cpu_to_be32(NFS4ERR_REQ_TOO_BIG)
237 #define nfserr_rep_too_big cpu_to_be32(NFS4ERR_REP_TOO_BIG)
238 #define nfserr_rep_too_big_to_cache cpu_to_be32(NFS4ERR_REP_TOO_BIG_TO_CACHE)
239 #define nfserr_retry_uncached_rep cpu_to_be32(NFS4ERR_RETRY_UNCACHED_REP)
240 #define nfserr_unsafe_compound cpu_to_be32(NFS4ERR_UNSAFE_COMPOUND)
241 #define nfserr_too_many_ops cpu_to_be32(NFS4ERR_TOO_MANY_OPS)
242 #define nfserr_op_not_in_session cpu_to_be32(NFS4ERR_OP_NOT_IN_SESSION)
243 #define nfserr_hash_alg_unsupp cpu_to_be32(NFS4ERR_HASH_ALG_UNSUPP)
244 #define nfserr_clientid_busy cpu_to_be32(NFS4ERR_CLIENTID_BUSY)
245 #define nfserr_pnfs_io_hole cpu_to_be32(NFS4ERR_PNFS_IO_HOLE)
246 #define nfserr_seq_false_retry cpu_to_be32(NFS4ERR_SEQ_FALSE_RETRY)
247 #define nfserr_bad_high_slot cpu_to_be32(NFS4ERR_BAD_HIGH_SLOT)
248 #define nfserr_deadsession cpu_to_be32(NFS4ERR_DEADSESSION)
249 #define nfserr_encr_alg_unsupp cpu_to_be32(NFS4ERR_ENCR_ALG_UNSUPP)
250 #define nfserr_pnfs_no_layout cpu_to_be32(NFS4ERR_PNFS_NO_LAYOUT)
251 #define nfserr_not_only_op cpu_to_be32(NFS4ERR_NOT_ONLY_OP)
252 #define nfserr_wrong_cred cpu_to_be32(NFS4ERR_WRONG_CRED)
253 #define nfserr_wrong_type cpu_to_be32(NFS4ERR_WRONG_TYPE)
254 #define nfserr_dirdeleg_unavail cpu_to_be32(NFS4ERR_DIRDELEG_UNAVAIL)
255 #define nfserr_reject_deleg cpu_to_be32(NFS4ERR_REJECT_DELEG)
256 #define nfserr_returnconflict cpu_to_be32(NFS4ERR_RETURNCONFLICT)
257 #define nfserr_deleg_revoked cpu_to_be32(NFS4ERR_DELEG_REVOKED)
258 #define nfserr_partner_notsupp cpu_to_be32(NFS4ERR_PARTNER_NOTSUPP)
259 #define nfserr_partner_no_auth cpu_to_be32(NFS4ERR_PARTNER_NO_AUTH)
260 #define nfserr_union_notsupp cpu_to_be32(NFS4ERR_UNION_NOTSUPP)
261 #define nfserr_offload_denied cpu_to_be32(NFS4ERR_OFFLOAD_DENIED)
262 #define nfserr_wrong_lfs cpu_to_be32(NFS4ERR_WRONG_LFS)
263 #define nfserr_badlabel cpu_to_be32(NFS4ERR_BADLABEL)
264
265 /* error codes for internal use */
266 /* if a request fails due to kmalloc failure, it gets dropped.
267 * Client should resend eventually
268 */
269 #define nfserr_dropit cpu_to_be32(30000)
270 /* end-of-file indicator in readdir */
271 #define nfserr_eof cpu_to_be32(30001)
272 /* replay detected */
273 #define nfserr_replay_me cpu_to_be32(11001)
274 /* nfs41 replay detected */
275 #define nfserr_replay_cache cpu_to_be32(11002)
276
277 /* Check for dir entries '.' and '..' */
278 #define isdotent(n, l) (l < 3 && n[0] == '.' && (l == 1 || n[1] == '.'))
279
280 #ifdef CONFIG_NFSD_V4
281
282 /* before processing a COMPOUND operation, we have to check that there
283 * is enough space in the buffer for XDR encode to succeed. otherwise,
284 * we might process an operation with side effects, and be unable to
285 * tell the client that the operation succeeded.
286 *
287 * COMPOUND_SLACK_SPACE - this is the minimum bytes of buffer space
288 * needed to encode an "ordinary" _successful_ operation. (GETATTR,
289 * READ, READDIR, and READLINK have their own buffer checks.) if we
290 * fall below this level, we fail the next operation with NFS4ERR_RESOURCE.
291 *
292 * COMPOUND_ERR_SLACK_SPACE - this is the minimum bytes of buffer space
293 * needed to encode an operation which has failed with NFS4ERR_RESOURCE.
294 * care is taken to ensure that we never fall below this level for any
295 * reason.
296 */
297 #define COMPOUND_SLACK_SPACE 140 /* OP_GETFH */
298 #define COMPOUND_ERR_SLACK_SPACE 16 /* OP_SETATTR */
299
300 #define NFSD_LAUNDROMAT_MINTIMEOUT 1 /* seconds */
301
302 /*
303 * The following attributes are currently not supported by the NFSv4 server:
304 * ARCHIVE (deprecated anyway)
305 * HIDDEN (unlikely to be supported any time soon)
306 * MIMETYPE (unlikely to be supported any time soon)
307 * QUOTA_* (will be supported in a forthcoming patch)
308 * SYSTEM (unlikely to be supported any time soon)
309 * TIME_BACKUP (unlikely to be supported any time soon)
310 * TIME_CREATE (unlikely to be supported any time soon)
311 */
312 #define NFSD4_SUPPORTED_ATTRS_WORD0 \
313 (FATTR4_WORD0_SUPPORTED_ATTRS | FATTR4_WORD0_TYPE | FATTR4_WORD0_FH_EXPIRE_TYPE \
314 | FATTR4_WORD0_CHANGE | FATTR4_WORD0_SIZE | FATTR4_WORD0_LINK_SUPPORT \
315 | FATTR4_WORD0_SYMLINK_SUPPORT | FATTR4_WORD0_NAMED_ATTR | FATTR4_WORD0_FSID \
316 | FATTR4_WORD0_UNIQUE_HANDLES | FATTR4_WORD0_LEASE_TIME | FATTR4_WORD0_RDATTR_ERROR \
317 | FATTR4_WORD0_ACLSUPPORT | FATTR4_WORD0_CANSETTIME | FATTR4_WORD0_CASE_INSENSITIVE \
318 | FATTR4_WORD0_CASE_PRESERVING | FATTR4_WORD0_CHOWN_RESTRICTED \
319 | FATTR4_WORD0_FILEHANDLE | FATTR4_WORD0_FILEID | FATTR4_WORD0_FILES_AVAIL \
320 | FATTR4_WORD0_FILES_FREE | FATTR4_WORD0_FILES_TOTAL | FATTR4_WORD0_FS_LOCATIONS | FATTR4_WORD0_HOMOGENEOUS \
321 | FATTR4_WORD0_MAXFILESIZE | FATTR4_WORD0_MAXLINK | FATTR4_WORD0_MAXNAME \
322 | FATTR4_WORD0_MAXREAD | FATTR4_WORD0_MAXWRITE | FATTR4_WORD0_ACL)
323
324 #define NFSD4_SUPPORTED_ATTRS_WORD1 \
325 (FATTR4_WORD1_MODE | FATTR4_WORD1_NO_TRUNC | FATTR4_WORD1_NUMLINKS \
326 | FATTR4_WORD1_OWNER | FATTR4_WORD1_OWNER_GROUP | FATTR4_WORD1_RAWDEV \
327 | FATTR4_WORD1_SPACE_AVAIL | FATTR4_WORD1_SPACE_FREE | FATTR4_WORD1_SPACE_TOTAL \
328 | FATTR4_WORD1_SPACE_USED | FATTR4_WORD1_TIME_ACCESS | FATTR4_WORD1_TIME_ACCESS_SET \
329 | FATTR4_WORD1_TIME_DELTA | FATTR4_WORD1_TIME_METADATA \
330 | FATTR4_WORD1_TIME_MODIFY | FATTR4_WORD1_TIME_MODIFY_SET | FATTR4_WORD1_MOUNTED_ON_FILEID)
331
332 #define NFSD4_SUPPORTED_ATTRS_WORD2 0
333
334 /* 4.1 */
335 #ifdef CONFIG_NFSD_PNFS
336 #define PNFSD_SUPPORTED_ATTRS_WORD1 FATTR4_WORD1_FS_LAYOUT_TYPES
337 #define PNFSD_SUPPORTED_ATTRS_WORD2 \
338 (FATTR4_WORD2_LAYOUT_BLKSIZE | FATTR4_WORD2_LAYOUT_TYPES)
339 #else
340 #define PNFSD_SUPPORTED_ATTRS_WORD1 0
341 #define PNFSD_SUPPORTED_ATTRS_WORD2 0
342 #endif /* CONFIG_NFSD_PNFS */
343
344 #define NFSD4_1_SUPPORTED_ATTRS_WORD0 \
345 NFSD4_SUPPORTED_ATTRS_WORD0
346
347 #define NFSD4_1_SUPPORTED_ATTRS_WORD1 \
348 (NFSD4_SUPPORTED_ATTRS_WORD1 | PNFSD_SUPPORTED_ATTRS_WORD1)
349
350 #define NFSD4_1_SUPPORTED_ATTRS_WORD2 \
351 (NFSD4_SUPPORTED_ATTRS_WORD2 | PNFSD_SUPPORTED_ATTRS_WORD2 | \
352 FATTR4_WORD2_SUPPATTR_EXCLCREAT)
353
354 /* 4.2 */
355 #ifdef CONFIG_NFSD_V4_SECURITY_LABEL
356 #define NFSD4_2_SECURITY_ATTRS FATTR4_WORD2_SECURITY_LABEL
357 #else
358 #define NFSD4_2_SECURITY_ATTRS 0
359 #endif
360
361 #define NFSD4_2_SUPPORTED_ATTRS_WORD2 \
362 (NFSD4_1_SUPPORTED_ATTRS_WORD2 | \
363 FATTR4_WORD2_CHANGE_ATTR_TYPE | \
364 FATTR4_WORD2_MODE_UMASK | \
365 NFSD4_2_SECURITY_ATTRS)
366
367 extern const u32 nfsd_suppattrs[3][3];
368
bmval_is_subset(const u32 * bm1,const u32 * bm2)369 static inline bool bmval_is_subset(const u32 *bm1, const u32 *bm2)
370 {
371 return !((bm1[0] & ~bm2[0]) ||
372 (bm1[1] & ~bm2[1]) ||
373 (bm1[2] & ~bm2[2]));
374 }
375
nfsd_attrs_supported(u32 minorversion,const u32 * bmval)376 static inline bool nfsd_attrs_supported(u32 minorversion, const u32 *bmval)
377 {
378 return bmval_is_subset(bmval, nfsd_suppattrs[minorversion]);
379 }
380
381 /* These will return ERR_INVAL if specified in GETATTR or READDIR. */
382 #define NFSD_WRITEONLY_ATTRS_WORD1 \
383 (FATTR4_WORD1_TIME_ACCESS_SET | FATTR4_WORD1_TIME_MODIFY_SET)
384
385 /*
386 * These are the only attrs allowed in CREATE/OPEN/SETATTR. Don't add
387 * a writeable attribute here without also adding code to parse it to
388 * nfsd4_decode_fattr().
389 */
390 #define NFSD_WRITEABLE_ATTRS_WORD0 \
391 (FATTR4_WORD0_SIZE | FATTR4_WORD0_ACL)
392 #define NFSD_WRITEABLE_ATTRS_WORD1 \
393 (FATTR4_WORD1_MODE | FATTR4_WORD1_OWNER | FATTR4_WORD1_OWNER_GROUP \
394 | FATTR4_WORD1_TIME_ACCESS_SET | FATTR4_WORD1_TIME_MODIFY_SET)
395 #ifdef CONFIG_NFSD_V4_SECURITY_LABEL
396 #define MAYBE_FATTR4_WORD2_SECURITY_LABEL \
397 FATTR4_WORD2_SECURITY_LABEL
398 #else
399 #define MAYBE_FATTR4_WORD2_SECURITY_LABEL 0
400 #endif
401 #define NFSD_WRITEABLE_ATTRS_WORD2 \
402 (FATTR4_WORD2_MODE_UMASK \
403 | MAYBE_FATTR4_WORD2_SECURITY_LABEL)
404
405 #define NFSD_SUPPATTR_EXCLCREAT_WORD0 \
406 NFSD_WRITEABLE_ATTRS_WORD0
407 /*
408 * we currently store the exclusive create verifier in the v_{a,m}time
409 * attributes so the client can't set these at create time using EXCLUSIVE4_1
410 */
411 #define NFSD_SUPPATTR_EXCLCREAT_WORD1 \
412 (NFSD_WRITEABLE_ATTRS_WORD1 & \
413 ~(FATTR4_WORD1_TIME_ACCESS_SET | FATTR4_WORD1_TIME_MODIFY_SET))
414 #define NFSD_SUPPATTR_EXCLCREAT_WORD2 \
415 NFSD_WRITEABLE_ATTRS_WORD2
416
417 extern int nfsd4_is_junction(struct dentry *dentry);
418 extern int register_cld_notifier(void);
419 extern void unregister_cld_notifier(void);
420 #else /* CONFIG_NFSD_V4 */
nfsd4_is_junction(struct dentry * dentry)421 static inline int nfsd4_is_junction(struct dentry *dentry)
422 {
423 return 0;
424 }
425
426 #define register_cld_notifier() 0
427 #define unregister_cld_notifier() do { } while(0)
428
429 #endif /* CONFIG_NFSD_V4 */
430
431 #endif /* LINUX_NFSD_NFSD_H */
432