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/svc_xprt.h>
21 #include <linux/sunrpc/msg_prot.h>
22
23 #include <uapi/linux/nfsd/debug.h>
24
25 #include "netns.h"
26 #include "stats.h"
27 #include "export.h"
28
29 #undef ifdebug
30 #ifdef CONFIG_SUNRPC_DEBUG
31 # define ifdebug(flag) if (nfsd_debug & NFSDDBG_##flag)
32 #else
33 # define ifdebug(flag) if (0)
34 #endif
35
36 /*
37 * nfsd version
38 */
39 #define NFSD_SUPPORTED_MINOR_VERSION 2
40 /*
41 * Maximum blocksizes supported by daemon under various circumstances.
42 */
43 #define NFSSVC_MAXBLKSIZE RPCSVC_MAXPAYLOAD
44 /* NFSv2 is limited by the protocol specification, see RFC 1094 */
45 #define NFSSVC_MAXBLKSIZE_V2 (8*1024)
46
47
48 /*
49 * Largest number of bytes we need to allocate for an NFS
50 * call or reply. Used to control buffer sizes. We use
51 * the length of v3 WRITE, READDIR and READDIR replies
52 * which are an RPC header, up to 26 XDR units of reply
53 * data, and some page data.
54 *
55 * Note that accuracy here doesn't matter too much as the
56 * size is rounded up to a page size when allocating space.
57 */
58 #define NFSD_BUFSIZE ((RPC_MAX_HEADER_WITH_AUTH+26)*XDR_UNIT + NFSSVC_MAXBLKSIZE)
59
60 struct readdir_cd {
61 __be32 err; /* 0, nfserr, or nfserr_eof */
62 };
63
64
65 extern struct svc_program nfsd_program;
66 extern const struct svc_version nfsd_version2, nfsd_version3,
67 nfsd_version4;
68 extern struct mutex nfsd_mutex;
69 extern spinlock_t nfsd_drc_lock;
70 extern unsigned long nfsd_drc_max_mem;
71 extern unsigned long nfsd_drc_mem_used;
72
73 extern const struct seq_operations nfs_exports_op;
74
75 /*
76 * Function prototypes.
77 */
78 int nfsd_svc(int nrservs, struct net *net, const struct cred *cred);
79 int nfsd_dispatch(struct svc_rqst *rqstp, __be32 *statp);
80
81 int nfsd_nrthreads(struct net *);
82 int nfsd_nrpools(struct net *);
83 int nfsd_get_nrthreads(int n, int *, struct net *);
84 int nfsd_set_nrthreads(int n, int *, struct net *);
85 int nfsd_pool_stats_open(struct inode *, struct file *);
86 int nfsd_pool_stats_release(struct inode *, struct file *);
87
88 void nfsd_destroy(struct net *net);
89
90 struct nfsdfs_client {
91 struct kref cl_ref;
92 void (*cl_release)(struct kref *kref);
93 };
94
95 struct nfsdfs_client *get_nfsdfs_client(struct inode *);
96 struct dentry *nfsd_client_mkdir(struct nfsd_net *nn,
97 struct nfsdfs_client *ncl, u32 id, const struct tree_descr *);
98 void nfsd_client_rmdir(struct dentry *dentry);
99
100 #if defined(CONFIG_NFSD_V2_ACL) || defined(CONFIG_NFSD_V3_ACL)
101 #ifdef CONFIG_NFSD_V2_ACL
102 extern const struct svc_version nfsd_acl_version2;
103 #else
104 #define nfsd_acl_version2 NULL
105 #endif
106 #ifdef CONFIG_NFSD_V3_ACL
107 extern const struct svc_version nfsd_acl_version3;
108 #else
109 #define nfsd_acl_version3 NULL
110 #endif
111 #endif
112
113 struct nfsd_net;
114
115 enum vers_op {NFSD_SET, NFSD_CLEAR, NFSD_TEST, NFSD_AVAIL };
116 int nfsd_vers(struct nfsd_net *nn, int vers, enum vers_op change);
117 int nfsd_minorversion(struct nfsd_net *nn, u32 minorversion, enum vers_op change);
118 void nfsd_reset_versions(struct nfsd_net *nn);
119 int nfsd_create_serv(struct net *net);
120
121 extern int nfsd_max_blksize;
122
nfsd_v4client(struct svc_rqst * rq)123 static inline int nfsd_v4client(struct svc_rqst *rq)
124 {
125 return rq->rq_prog == NFS_PROGRAM && rq->rq_vers == 4;
126 }
127 static inline struct user_namespace *
nfsd_user_namespace(const struct svc_rqst * rqstp)128 nfsd_user_namespace(const struct svc_rqst *rqstp)
129 {
130 const struct cred *cred = rqstp->rq_xprt->xpt_cred;
131 return cred ? cred->user_ns : &init_user_ns;
132 }
133
134 /*
135 * NFSv4 State
136 */
137 #ifdef CONFIG_NFSD_V4
138 extern unsigned long max_delegations;
139 int nfsd4_init_slabs(void);
140 void nfsd4_free_slabs(void);
141 int nfs4_state_start(void);
142 int nfs4_state_start_net(struct net *net);
143 void nfs4_state_shutdown(void);
144 void nfs4_state_shutdown_net(struct net *net);
145 void nfs4_reset_lease(time_t leasetime);
146 int nfs4_reset_recoverydir(char *recdir);
147 char * nfs4_recoverydir(void);
148 bool nfsd4_spo_must_allow(struct svc_rqst *rqstp);
149 #else
nfsd4_init_slabs(void)150 static inline int nfsd4_init_slabs(void) { return 0; }
nfsd4_free_slabs(void)151 static inline void nfsd4_free_slabs(void) { }
nfs4_state_start(void)152 static inline int nfs4_state_start(void) { return 0; }
nfs4_state_start_net(struct net * net)153 static inline int nfs4_state_start_net(struct net *net) { return 0; }
nfs4_state_shutdown(void)154 static inline void nfs4_state_shutdown(void) { }
nfs4_state_shutdown_net(struct net * net)155 static inline void nfs4_state_shutdown_net(struct net *net) { }
nfs4_reset_lease(time_t leasetime)156 static inline void nfs4_reset_lease(time_t leasetime) { }
nfs4_reset_recoverydir(char * recdir)157 static inline int nfs4_reset_recoverydir(char *recdir) { return 0; }
nfs4_recoverydir(void)158 static inline char * nfs4_recoverydir(void) {return NULL; }
nfsd4_spo_must_allow(struct svc_rqst * rqstp)159 static inline bool nfsd4_spo_must_allow(struct svc_rqst *rqstp)
160 {
161 return false;
162 }
163 #endif
164
165 /*
166 * lockd binding
167 */
168 void nfsd_lockd_init(void);
169 void nfsd_lockd_shutdown(void);
170
171
172 /*
173 * These macros provide pre-xdr'ed values for faster operation.
174 */
175 #define nfs_ok cpu_to_be32(NFS_OK)
176 #define nfserr_perm cpu_to_be32(NFSERR_PERM)
177 #define nfserr_noent cpu_to_be32(NFSERR_NOENT)
178 #define nfserr_io cpu_to_be32(NFSERR_IO)
179 #define nfserr_nxio cpu_to_be32(NFSERR_NXIO)
180 #define nfserr_eagain cpu_to_be32(NFSERR_EAGAIN)
181 #define nfserr_acces cpu_to_be32(NFSERR_ACCES)
182 #define nfserr_exist cpu_to_be32(NFSERR_EXIST)
183 #define nfserr_xdev cpu_to_be32(NFSERR_XDEV)
184 #define nfserr_nodev cpu_to_be32(NFSERR_NODEV)
185 #define nfserr_notdir cpu_to_be32(NFSERR_NOTDIR)
186 #define nfserr_isdir cpu_to_be32(NFSERR_ISDIR)
187 #define nfserr_inval cpu_to_be32(NFSERR_INVAL)
188 #define nfserr_fbig cpu_to_be32(NFSERR_FBIG)
189 #define nfserr_nospc cpu_to_be32(NFSERR_NOSPC)
190 #define nfserr_rofs cpu_to_be32(NFSERR_ROFS)
191 #define nfserr_mlink cpu_to_be32(NFSERR_MLINK)
192 #define nfserr_opnotsupp cpu_to_be32(NFSERR_OPNOTSUPP)
193 #define nfserr_nametoolong cpu_to_be32(NFSERR_NAMETOOLONG)
194 #define nfserr_notempty cpu_to_be32(NFSERR_NOTEMPTY)
195 #define nfserr_dquot cpu_to_be32(NFSERR_DQUOT)
196 #define nfserr_stale cpu_to_be32(NFSERR_STALE)
197 #define nfserr_remote cpu_to_be32(NFSERR_REMOTE)
198 #define nfserr_wflush cpu_to_be32(NFSERR_WFLUSH)
199 #define nfserr_badhandle cpu_to_be32(NFSERR_BADHANDLE)
200 #define nfserr_notsync cpu_to_be32(NFSERR_NOT_SYNC)
201 #define nfserr_badcookie cpu_to_be32(NFSERR_BAD_COOKIE)
202 #define nfserr_notsupp cpu_to_be32(NFSERR_NOTSUPP)
203 #define nfserr_toosmall cpu_to_be32(NFSERR_TOOSMALL)
204 #define nfserr_serverfault cpu_to_be32(NFSERR_SERVERFAULT)
205 #define nfserr_badtype cpu_to_be32(NFSERR_BADTYPE)
206 #define nfserr_jukebox cpu_to_be32(NFSERR_JUKEBOX)
207 #define nfserr_denied cpu_to_be32(NFSERR_DENIED)
208 #define nfserr_deadlock cpu_to_be32(NFSERR_DEADLOCK)
209 #define nfserr_expired cpu_to_be32(NFSERR_EXPIRED)
210 #define nfserr_bad_cookie cpu_to_be32(NFSERR_BAD_COOKIE)
211 #define nfserr_same cpu_to_be32(NFSERR_SAME)
212 #define nfserr_clid_inuse cpu_to_be32(NFSERR_CLID_INUSE)
213 #define nfserr_stale_clientid cpu_to_be32(NFSERR_STALE_CLIENTID)
214 #define nfserr_resource cpu_to_be32(NFSERR_RESOURCE)
215 #define nfserr_moved cpu_to_be32(NFSERR_MOVED)
216 #define nfserr_nofilehandle cpu_to_be32(NFSERR_NOFILEHANDLE)
217 #define nfserr_minor_vers_mismatch cpu_to_be32(NFSERR_MINOR_VERS_MISMATCH)
218 #define nfserr_share_denied cpu_to_be32(NFSERR_SHARE_DENIED)
219 #define nfserr_stale_stateid cpu_to_be32(NFSERR_STALE_STATEID)
220 #define nfserr_old_stateid cpu_to_be32(NFSERR_OLD_STATEID)
221 #define nfserr_bad_stateid cpu_to_be32(NFSERR_BAD_STATEID)
222 #define nfserr_bad_seqid cpu_to_be32(NFSERR_BAD_SEQID)
223 #define nfserr_symlink cpu_to_be32(NFSERR_SYMLINK)
224 #define nfserr_not_same cpu_to_be32(NFSERR_NOT_SAME)
225 #define nfserr_lock_range cpu_to_be32(NFSERR_LOCK_RANGE)
226 #define nfserr_restorefh cpu_to_be32(NFSERR_RESTOREFH)
227 #define nfserr_attrnotsupp cpu_to_be32(NFSERR_ATTRNOTSUPP)
228 #define nfserr_bad_xdr cpu_to_be32(NFSERR_BAD_XDR)
229 #define nfserr_openmode cpu_to_be32(NFSERR_OPENMODE)
230 #define nfserr_badowner cpu_to_be32(NFSERR_BADOWNER)
231 #define nfserr_locks_held cpu_to_be32(NFSERR_LOCKS_HELD)
232 #define nfserr_op_illegal cpu_to_be32(NFSERR_OP_ILLEGAL)
233 #define nfserr_grace cpu_to_be32(NFSERR_GRACE)
234 #define nfserr_no_grace cpu_to_be32(NFSERR_NO_GRACE)
235 #define nfserr_reclaim_bad cpu_to_be32(NFSERR_RECLAIM_BAD)
236 #define nfserr_badname cpu_to_be32(NFSERR_BADNAME)
237 #define nfserr_cb_path_down cpu_to_be32(NFSERR_CB_PATH_DOWN)
238 #define nfserr_locked cpu_to_be32(NFSERR_LOCKED)
239 #define nfserr_wrongsec cpu_to_be32(NFSERR_WRONGSEC)
240 #define nfserr_badiomode cpu_to_be32(NFS4ERR_BADIOMODE)
241 #define nfserr_badlayout cpu_to_be32(NFS4ERR_BADLAYOUT)
242 #define nfserr_bad_session_digest cpu_to_be32(NFS4ERR_BAD_SESSION_DIGEST)
243 #define nfserr_badsession cpu_to_be32(NFS4ERR_BADSESSION)
244 #define nfserr_badslot cpu_to_be32(NFS4ERR_BADSLOT)
245 #define nfserr_complete_already cpu_to_be32(NFS4ERR_COMPLETE_ALREADY)
246 #define nfserr_conn_not_bound_to_session cpu_to_be32(NFS4ERR_CONN_NOT_BOUND_TO_SESSION)
247 #define nfserr_deleg_already_wanted cpu_to_be32(NFS4ERR_DELEG_ALREADY_WANTED)
248 #define nfserr_back_chan_busy cpu_to_be32(NFS4ERR_BACK_CHAN_BUSY)
249 #define nfserr_layouttrylater cpu_to_be32(NFS4ERR_LAYOUTTRYLATER)
250 #define nfserr_layoutunavailable cpu_to_be32(NFS4ERR_LAYOUTUNAVAILABLE)
251 #define nfserr_nomatching_layout cpu_to_be32(NFS4ERR_NOMATCHING_LAYOUT)
252 #define nfserr_recallconflict cpu_to_be32(NFS4ERR_RECALLCONFLICT)
253 #define nfserr_unknown_layouttype cpu_to_be32(NFS4ERR_UNKNOWN_LAYOUTTYPE)
254 #define nfserr_seq_misordered cpu_to_be32(NFS4ERR_SEQ_MISORDERED)
255 #define nfserr_sequence_pos cpu_to_be32(NFS4ERR_SEQUENCE_POS)
256 #define nfserr_req_too_big cpu_to_be32(NFS4ERR_REQ_TOO_BIG)
257 #define nfserr_rep_too_big cpu_to_be32(NFS4ERR_REP_TOO_BIG)
258 #define nfserr_rep_too_big_to_cache cpu_to_be32(NFS4ERR_REP_TOO_BIG_TO_CACHE)
259 #define nfserr_retry_uncached_rep cpu_to_be32(NFS4ERR_RETRY_UNCACHED_REP)
260 #define nfserr_unsafe_compound cpu_to_be32(NFS4ERR_UNSAFE_COMPOUND)
261 #define nfserr_too_many_ops cpu_to_be32(NFS4ERR_TOO_MANY_OPS)
262 #define nfserr_op_not_in_session cpu_to_be32(NFS4ERR_OP_NOT_IN_SESSION)
263 #define nfserr_hash_alg_unsupp cpu_to_be32(NFS4ERR_HASH_ALG_UNSUPP)
264 #define nfserr_clientid_busy cpu_to_be32(NFS4ERR_CLIENTID_BUSY)
265 #define nfserr_pnfs_io_hole cpu_to_be32(NFS4ERR_PNFS_IO_HOLE)
266 #define nfserr_seq_false_retry cpu_to_be32(NFS4ERR_SEQ_FALSE_RETRY)
267 #define nfserr_bad_high_slot cpu_to_be32(NFS4ERR_BAD_HIGH_SLOT)
268 #define nfserr_deadsession cpu_to_be32(NFS4ERR_DEADSESSION)
269 #define nfserr_encr_alg_unsupp cpu_to_be32(NFS4ERR_ENCR_ALG_UNSUPP)
270 #define nfserr_pnfs_no_layout cpu_to_be32(NFS4ERR_PNFS_NO_LAYOUT)
271 #define nfserr_not_only_op cpu_to_be32(NFS4ERR_NOT_ONLY_OP)
272 #define nfserr_wrong_cred cpu_to_be32(NFS4ERR_WRONG_CRED)
273 #define nfserr_wrong_type cpu_to_be32(NFS4ERR_WRONG_TYPE)
274 #define nfserr_dirdeleg_unavail cpu_to_be32(NFS4ERR_DIRDELEG_UNAVAIL)
275 #define nfserr_reject_deleg cpu_to_be32(NFS4ERR_REJECT_DELEG)
276 #define nfserr_returnconflict cpu_to_be32(NFS4ERR_RETURNCONFLICT)
277 #define nfserr_deleg_revoked cpu_to_be32(NFS4ERR_DELEG_REVOKED)
278 #define nfserr_partner_notsupp cpu_to_be32(NFS4ERR_PARTNER_NOTSUPP)
279 #define nfserr_partner_no_auth cpu_to_be32(NFS4ERR_PARTNER_NO_AUTH)
280 #define nfserr_union_notsupp cpu_to_be32(NFS4ERR_UNION_NOTSUPP)
281 #define nfserr_offload_denied cpu_to_be32(NFS4ERR_OFFLOAD_DENIED)
282 #define nfserr_wrong_lfs cpu_to_be32(NFS4ERR_WRONG_LFS)
283 #define nfserr_badlabel cpu_to_be32(NFS4ERR_BADLABEL)
284
285 /* error codes for internal use */
286 /* if a request fails due to kmalloc failure, it gets dropped.
287 * Client should resend eventually
288 */
289 #define nfserr_dropit cpu_to_be32(30000)
290 /* end-of-file indicator in readdir */
291 #define nfserr_eof cpu_to_be32(30001)
292 /* replay detected */
293 #define nfserr_replay_me cpu_to_be32(11001)
294 /* nfs41 replay detected */
295 #define nfserr_replay_cache cpu_to_be32(11002)
296
297 /* Check for dir entries '.' and '..' */
298 #define isdotent(n, l) (l < 3 && n[0] == '.' && (l == 1 || n[1] == '.'))
299
300 #ifdef CONFIG_NFSD_V4
301
302 /* before processing a COMPOUND operation, we have to check that there
303 * is enough space in the buffer for XDR encode to succeed. otherwise,
304 * we might process an operation with side effects, and be unable to
305 * tell the client that the operation succeeded.
306 *
307 * COMPOUND_SLACK_SPACE - this is the minimum bytes of buffer space
308 * needed to encode an "ordinary" _successful_ operation. (GETATTR,
309 * READ, READDIR, and READLINK have their own buffer checks.) if we
310 * fall below this level, we fail the next operation with NFS4ERR_RESOURCE.
311 *
312 * COMPOUND_ERR_SLACK_SPACE - this is the minimum bytes of buffer space
313 * needed to encode an operation which has failed with NFS4ERR_RESOURCE.
314 * care is taken to ensure that we never fall below this level for any
315 * reason.
316 */
317 #define COMPOUND_SLACK_SPACE 140 /* OP_GETFH */
318 #define COMPOUND_ERR_SLACK_SPACE 16 /* OP_SETATTR */
319
320 #define NFSD_LAUNDROMAT_MINTIMEOUT 1 /* seconds */
321
322 /*
323 * The following attributes are currently not supported by the NFSv4 server:
324 * ARCHIVE (deprecated anyway)
325 * HIDDEN (unlikely to be supported any time soon)
326 * MIMETYPE (unlikely to be supported any time soon)
327 * QUOTA_* (will be supported in a forthcoming patch)
328 * SYSTEM (unlikely to be supported any time soon)
329 * TIME_BACKUP (unlikely to be supported any time soon)
330 * TIME_CREATE (unlikely to be supported any time soon)
331 */
332 #define NFSD4_SUPPORTED_ATTRS_WORD0 \
333 (FATTR4_WORD0_SUPPORTED_ATTRS | FATTR4_WORD0_TYPE | FATTR4_WORD0_FH_EXPIRE_TYPE \
334 | FATTR4_WORD0_CHANGE | FATTR4_WORD0_SIZE | FATTR4_WORD0_LINK_SUPPORT \
335 | FATTR4_WORD0_SYMLINK_SUPPORT | FATTR4_WORD0_NAMED_ATTR | FATTR4_WORD0_FSID \
336 | FATTR4_WORD0_UNIQUE_HANDLES | FATTR4_WORD0_LEASE_TIME | FATTR4_WORD0_RDATTR_ERROR \
337 | FATTR4_WORD0_ACLSUPPORT | FATTR4_WORD0_CANSETTIME | FATTR4_WORD0_CASE_INSENSITIVE \
338 | FATTR4_WORD0_CASE_PRESERVING | FATTR4_WORD0_CHOWN_RESTRICTED \
339 | FATTR4_WORD0_FILEHANDLE | FATTR4_WORD0_FILEID | FATTR4_WORD0_FILES_AVAIL \
340 | FATTR4_WORD0_FILES_FREE | FATTR4_WORD0_FILES_TOTAL | FATTR4_WORD0_FS_LOCATIONS | FATTR4_WORD0_HOMOGENEOUS \
341 | FATTR4_WORD0_MAXFILESIZE | FATTR4_WORD0_MAXLINK | FATTR4_WORD0_MAXNAME \
342 | FATTR4_WORD0_MAXREAD | FATTR4_WORD0_MAXWRITE | FATTR4_WORD0_ACL)
343
344 #define NFSD4_SUPPORTED_ATTRS_WORD1 \
345 (FATTR4_WORD1_MODE | FATTR4_WORD1_NO_TRUNC | FATTR4_WORD1_NUMLINKS \
346 | FATTR4_WORD1_OWNER | FATTR4_WORD1_OWNER_GROUP | FATTR4_WORD1_RAWDEV \
347 | FATTR4_WORD1_SPACE_AVAIL | FATTR4_WORD1_SPACE_FREE | FATTR4_WORD1_SPACE_TOTAL \
348 | FATTR4_WORD1_SPACE_USED | FATTR4_WORD1_TIME_ACCESS | FATTR4_WORD1_TIME_ACCESS_SET \
349 | FATTR4_WORD1_TIME_DELTA | FATTR4_WORD1_TIME_METADATA \
350 | FATTR4_WORD1_TIME_MODIFY | FATTR4_WORD1_TIME_MODIFY_SET | FATTR4_WORD1_MOUNTED_ON_FILEID)
351
352 #define NFSD4_SUPPORTED_ATTRS_WORD2 0
353
354 /* 4.1 */
355 #ifdef CONFIG_NFSD_PNFS
356 #define PNFSD_SUPPORTED_ATTRS_WORD1 FATTR4_WORD1_FS_LAYOUT_TYPES
357 #define PNFSD_SUPPORTED_ATTRS_WORD2 \
358 (FATTR4_WORD2_LAYOUT_BLKSIZE | FATTR4_WORD2_LAYOUT_TYPES)
359 #else
360 #define PNFSD_SUPPORTED_ATTRS_WORD1 0
361 #define PNFSD_SUPPORTED_ATTRS_WORD2 0
362 #endif /* CONFIG_NFSD_PNFS */
363
364 #define NFSD4_1_SUPPORTED_ATTRS_WORD0 \
365 NFSD4_SUPPORTED_ATTRS_WORD0
366
367 #define NFSD4_1_SUPPORTED_ATTRS_WORD1 \
368 (NFSD4_SUPPORTED_ATTRS_WORD1 | PNFSD_SUPPORTED_ATTRS_WORD1)
369
370 #define NFSD4_1_SUPPORTED_ATTRS_WORD2 \
371 (NFSD4_SUPPORTED_ATTRS_WORD2 | PNFSD_SUPPORTED_ATTRS_WORD2 | \
372 FATTR4_WORD2_SUPPATTR_EXCLCREAT)
373
374 /* 4.2 */
375 #ifdef CONFIG_NFSD_V4_SECURITY_LABEL
376 #define NFSD4_2_SECURITY_ATTRS FATTR4_WORD2_SECURITY_LABEL
377 #else
378 #define NFSD4_2_SECURITY_ATTRS 0
379 #endif
380
381 #define NFSD4_2_SUPPORTED_ATTRS_WORD2 \
382 (NFSD4_1_SUPPORTED_ATTRS_WORD2 | \
383 FATTR4_WORD2_CHANGE_ATTR_TYPE | \
384 FATTR4_WORD2_MODE_UMASK | \
385 NFSD4_2_SECURITY_ATTRS)
386
387 extern const u32 nfsd_suppattrs[3][3];
388
bmval_is_subset(const u32 * bm1,const u32 * bm2)389 static inline bool bmval_is_subset(const u32 *bm1, const u32 *bm2)
390 {
391 return !((bm1[0] & ~bm2[0]) ||
392 (bm1[1] & ~bm2[1]) ||
393 (bm1[2] & ~bm2[2]));
394 }
395
nfsd_attrs_supported(u32 minorversion,const u32 * bmval)396 static inline bool nfsd_attrs_supported(u32 minorversion, const u32 *bmval)
397 {
398 return bmval_is_subset(bmval, nfsd_suppattrs[minorversion]);
399 }
400
401 /* These will return ERR_INVAL if specified in GETATTR or READDIR. */
402 #define NFSD_WRITEONLY_ATTRS_WORD1 \
403 (FATTR4_WORD1_TIME_ACCESS_SET | FATTR4_WORD1_TIME_MODIFY_SET)
404
405 /*
406 * These are the only attrs allowed in CREATE/OPEN/SETATTR. Don't add
407 * a writeable attribute here without also adding code to parse it to
408 * nfsd4_decode_fattr().
409 */
410 #define NFSD_WRITEABLE_ATTRS_WORD0 \
411 (FATTR4_WORD0_SIZE | FATTR4_WORD0_ACL)
412 #define NFSD_WRITEABLE_ATTRS_WORD1 \
413 (FATTR4_WORD1_MODE | FATTR4_WORD1_OWNER | FATTR4_WORD1_OWNER_GROUP \
414 | FATTR4_WORD1_TIME_ACCESS_SET | FATTR4_WORD1_TIME_MODIFY_SET)
415 #ifdef CONFIG_NFSD_V4_SECURITY_LABEL
416 #define MAYBE_FATTR4_WORD2_SECURITY_LABEL \
417 FATTR4_WORD2_SECURITY_LABEL
418 #else
419 #define MAYBE_FATTR4_WORD2_SECURITY_LABEL 0
420 #endif
421 #define NFSD_WRITEABLE_ATTRS_WORD2 \
422 (FATTR4_WORD2_MODE_UMASK \
423 | MAYBE_FATTR4_WORD2_SECURITY_LABEL)
424
425 #define NFSD_SUPPATTR_EXCLCREAT_WORD0 \
426 NFSD_WRITEABLE_ATTRS_WORD0
427 /*
428 * we currently store the exclusive create verifier in the v_{a,m}time
429 * attributes so the client can't set these at create time using EXCLUSIVE4_1
430 */
431 #define NFSD_SUPPATTR_EXCLCREAT_WORD1 \
432 (NFSD_WRITEABLE_ATTRS_WORD1 & \
433 ~(FATTR4_WORD1_TIME_ACCESS_SET | FATTR4_WORD1_TIME_MODIFY_SET))
434 #define NFSD_SUPPATTR_EXCLCREAT_WORD2 \
435 NFSD_WRITEABLE_ATTRS_WORD2
436
437 extern int nfsd4_is_junction(struct dentry *dentry);
438 extern int register_cld_notifier(void);
439 extern void unregister_cld_notifier(void);
440 #else /* CONFIG_NFSD_V4 */
nfsd4_is_junction(struct dentry * dentry)441 static inline int nfsd4_is_junction(struct dentry *dentry)
442 {
443 return 0;
444 }
445
446 #define register_cld_notifier() 0
447 #define unregister_cld_notifier() do { } while(0)
448
449 #endif /* CONFIG_NFSD_V4 */
450
451 #endif /* LINUX_NFSD_NFSD_H */
452
