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 #include <linux/sunrpc/addr.h>
23
24 #include <uapi/linux/nfsd/debug.h>
25
26 #include "export.h"
27
28 #undef ifdebug
29 #ifdef CONFIG_SUNRPC_DEBUG
30 # define ifdebug(flag) if (nfsd_debug & NFSDDBG_##flag)
31 #else
32 # define ifdebug(flag) if (0)
33 #endif
34
35 /*
36 * nfsd version
37 */
38 #define NFSD_MINVERS 2
39 #define NFSD_MAXVERS 4
40 #define NFSD_SUPPORTED_MINOR_VERSION 2
41 bool nfsd_support_version(int vers);
42
43 #include "netns.h"
44 #include "stats.h"
45
46 /*
47 * Default and maximum payload size (NFS READ or WRITE), in bytes.
48 * The default is historical, and the maximum is an implementation
49 * limit.
50 */
51 enum {
52 NFSSVC_DEFBLKSIZE = 1 * 1024 * 1024,
53 NFSSVC_MAXBLKSIZE = RPCSVC_MAXPAYLOAD,
54 };
55
56 struct readdir_cd {
57 __be32 err; /* 0, nfserr, or nfserr_eof */
58 };
59
60 struct nfsd_genl_rqstp {
61 struct sockaddr rq_daddr;
62 struct sockaddr rq_saddr;
63 unsigned long rq_flags;
64 ktime_t rq_stime;
65 __be32 rq_xid;
66 u32 rq_vers;
67 u32 rq_prog;
68 u32 rq_proc;
69
70 /* NFSv4 compound */
71 u32 rq_opcnt;
72 u32 rq_opnum[16];
73 };
74
75 extern struct svc_program nfsd_programs[];
76 extern const struct svc_version nfsd_version2, nfsd_version3, nfsd_version4;
77 extern struct mutex nfsd_mutex;
78 extern atomic_t nfsd_th_cnt; /* number of available threads */
79
80 extern const struct seq_operations nfs_exports_op;
81
82 /*
83 * Common void argument and result helpers
84 */
85 struct nfsd_voidargs { };
86 struct nfsd_voidres { };
87 bool nfssvc_decode_voidarg(struct svc_rqst *rqstp,
88 struct xdr_stream *xdr);
89 bool nfssvc_encode_voidres(struct svc_rqst *rqstp,
90 struct xdr_stream *xdr);
91
92 /*
93 * Function prototypes.
94 */
95 int nfsd_svc(int n, int *nservers, struct net *net,
96 const struct cred *cred, const char *scope);
97 int nfsd_dispatch(struct svc_rqst *rqstp);
98
99 int nfsd_nrthreads(struct net *);
100 int nfsd_nrpools(struct net *);
101 int nfsd_get_nrthreads(int n, int *, struct net *);
102 int nfsd_set_nrthreads(int n, int *, struct net *);
103 void nfsd_shutdown_threads(struct net *net);
104
105 struct svc_rqst *nfsd_current_rqst(void);
106
107 struct nfsdfs_client {
108 struct kref cl_ref;
109 void (*cl_release)(struct kref *kref);
110 };
111
112 struct nfsdfs_client *get_nfsdfs_client(struct inode *);
113 struct dentry *nfsd_client_mkdir(struct nfsd_net *nn,
114 struct nfsdfs_client *ncl, u32 id,
115 const struct tree_descr *,
116 struct dentry **fdentries);
117 void nfsd_client_rmdir(struct dentry *dentry);
118
119
120 #if defined(CONFIG_NFSD_V2_ACL) || defined(CONFIG_NFSD_V3_ACL)
121 #ifdef CONFIG_NFSD_V2_ACL
122 extern const struct svc_version nfsd_acl_version2;
123 #else
124 #define nfsd_acl_version2 NULL
125 #endif
126 #ifdef CONFIG_NFSD_V3_ACL
127 extern const struct svc_version nfsd_acl_version3;
128 #else
129 #define nfsd_acl_version3 NULL
130 #endif
131 #endif
132
133 #if IS_ENABLED(CONFIG_NFS_LOCALIO)
134 extern const struct svc_version localio_version1;
135 #endif
136
137 struct nfsd_net;
138
139 enum vers_op {NFSD_SET, NFSD_CLEAR, NFSD_TEST, NFSD_AVAIL };
140 int nfsd_vers(struct nfsd_net *nn, int vers, enum vers_op change);
141 int nfsd_minorversion(struct nfsd_net *nn, u32 minorversion, enum vers_op change);
142 void nfsd_reset_versions(struct nfsd_net *nn);
143 int nfsd_create_serv(struct net *net);
144 void nfsd_destroy_serv(struct net *net);
145
146 #ifdef CONFIG_DEBUG_FS
147 void nfsd_debugfs_init(void);
148 void nfsd_debugfs_exit(void);
149 #else
nfsd_debugfs_init(void)150 static inline void nfsd_debugfs_init(void) {}
nfsd_debugfs_exit(void)151 static inline void nfsd_debugfs_exit(void) {}
152 #endif
153
154 extern bool nfsd_disable_splice_read __read_mostly;
155
156 enum {
157 /* Any new NFSD_IO enum value must be added at the end */
158 NFSD_IO_BUFFERED,
159 NFSD_IO_DONTCACHE,
160 };
161
162 extern u64 nfsd_io_cache_read __read_mostly;
163 extern u64 nfsd_io_cache_write __read_mostly;
164
165 extern int nfsd_max_blksize;
166
nfsd_v4client(struct svc_rqst * rq)167 static inline int nfsd_v4client(struct svc_rqst *rq)
168 {
169 return rq && rq->rq_prog == NFS_PROGRAM && rq->rq_vers == 4;
170 }
171 static inline struct user_namespace *
nfsd_user_namespace(const struct svc_rqst * rqstp)172 nfsd_user_namespace(const struct svc_rqst *rqstp)
173 {
174 const struct cred *cred = rqstp->rq_xprt->xpt_cred;
175 return cred ? cred->user_ns : &init_user_ns;
176 }
177
178 /*
179 * NFSv4 State
180 */
181 #ifdef CONFIG_NFSD_V4
182 extern unsigned long max_delegations;
183 int nfsd4_init_slabs(void);
184 void nfsd4_free_slabs(void);
185 int nfs4_state_start(void);
186 int nfs4_state_start_net(struct net *net);
187 void nfs4_state_shutdown(void);
188 void nfs4_state_shutdown_net(struct net *net);
189 int nfs4_reset_recoverydir(char *recdir);
190 char * nfs4_recoverydir(void);
191 bool nfsd4_spo_must_allow(struct svc_rqst *rqstp);
192 int nfsd4_create_laundry_wq(void);
193 void nfsd4_destroy_laundry_wq(void);
194 bool nfsd_wait_for_delegreturn(struct svc_rqst *rqstp, struct inode *inode);
195 #else
nfsd4_init_slabs(void)196 static inline int nfsd4_init_slabs(void) { return 0; }
nfsd4_free_slabs(void)197 static inline void nfsd4_free_slabs(void) { }
nfs4_state_start(void)198 static inline int nfs4_state_start(void) { return 0; }
nfs4_state_start_net(struct net * net)199 static inline int nfs4_state_start_net(struct net *net) { return 0; }
nfs4_state_shutdown(void)200 static inline void nfs4_state_shutdown(void) { }
nfs4_state_shutdown_net(struct net * net)201 static inline void nfs4_state_shutdown_net(struct net *net) { }
nfs4_reset_recoverydir(char * recdir)202 static inline int nfs4_reset_recoverydir(char *recdir) { return 0; }
nfs4_recoverydir(void)203 static inline char * nfs4_recoverydir(void) {return NULL; }
nfsd4_spo_must_allow(struct svc_rqst * rqstp)204 static inline bool nfsd4_spo_must_allow(struct svc_rqst *rqstp)
205 {
206 return false;
207 }
nfsd4_create_laundry_wq(void)208 static inline int nfsd4_create_laundry_wq(void) { return 0; };
nfsd4_destroy_laundry_wq(void)209 static inline void nfsd4_destroy_laundry_wq(void) {};
nfsd_wait_for_delegreturn(struct svc_rqst * rqstp,struct inode * inode)210 static inline bool nfsd_wait_for_delegreturn(struct svc_rqst *rqstp,
211 struct inode *inode)
212 {
213 return false;
214 }
215 #endif
216
217 /*
218 * lockd binding
219 */
220 void nfsd_lockd_init(void);
221 void nfsd_lockd_shutdown(void);
222
223
224 /*
225 * These macros provide pre-xdr'ed values for faster operation.
226 */
227 #define nfs_ok cpu_to_be32(NFS_OK)
228 #define nfserr_perm cpu_to_be32(NFSERR_PERM)
229 #define nfserr_noent cpu_to_be32(NFSERR_NOENT)
230 #define nfserr_io cpu_to_be32(NFSERR_IO)
231 #define nfserr_nxio cpu_to_be32(NFSERR_NXIO)
232 #define nfserr_eagain cpu_to_be32(NFSERR_EAGAIN)
233 #define nfserr_acces cpu_to_be32(NFSERR_ACCES)
234 #define nfserr_exist cpu_to_be32(NFSERR_EXIST)
235 #define nfserr_xdev cpu_to_be32(NFSERR_XDEV)
236 #define nfserr_nodev cpu_to_be32(NFSERR_NODEV)
237 #define nfserr_notdir cpu_to_be32(NFSERR_NOTDIR)
238 #define nfserr_isdir cpu_to_be32(NFSERR_ISDIR)
239 #define nfserr_inval cpu_to_be32(NFSERR_INVAL)
240 #define nfserr_fbig cpu_to_be32(NFSERR_FBIG)
241 #define nfserr_nospc cpu_to_be32(NFSERR_NOSPC)
242 #define nfserr_rofs cpu_to_be32(NFSERR_ROFS)
243 #define nfserr_mlink cpu_to_be32(NFSERR_MLINK)
244 #define nfserr_nametoolong cpu_to_be32(NFSERR_NAMETOOLONG)
245 #define nfserr_notempty cpu_to_be32(NFSERR_NOTEMPTY)
246 #define nfserr_dquot cpu_to_be32(NFSERR_DQUOT)
247 #define nfserr_stale cpu_to_be32(NFSERR_STALE)
248 #define nfserr_remote cpu_to_be32(NFSERR_REMOTE)
249 #define nfserr_wflush cpu_to_be32(NFSERR_WFLUSH)
250 #define nfserr_badhandle cpu_to_be32(NFSERR_BADHANDLE)
251 #define nfserr_notsync cpu_to_be32(NFSERR_NOT_SYNC)
252 #define nfserr_badcookie cpu_to_be32(NFSERR_BAD_COOKIE)
253 #define nfserr_notsupp cpu_to_be32(NFSERR_NOTSUPP)
254 #define nfserr_toosmall cpu_to_be32(NFSERR_TOOSMALL)
255 #define nfserr_serverfault cpu_to_be32(NFSERR_SERVERFAULT)
256 #define nfserr_badtype cpu_to_be32(NFSERR_BADTYPE)
257 #define nfserr_jukebox cpu_to_be32(NFSERR_JUKEBOX)
258 #define nfserr_denied cpu_to_be32(NFSERR_DENIED)
259 #define nfserr_deadlock cpu_to_be32(NFSERR_DEADLOCK)
260 #define nfserr_expired cpu_to_be32(NFSERR_EXPIRED)
261 #define nfserr_bad_cookie cpu_to_be32(NFSERR_BAD_COOKIE)
262 #define nfserr_same cpu_to_be32(NFSERR_SAME)
263 #define nfserr_clid_inuse cpu_to_be32(NFSERR_CLID_INUSE)
264 #define nfserr_stale_clientid cpu_to_be32(NFSERR_STALE_CLIENTID)
265 #define nfserr_resource cpu_to_be32(NFSERR_RESOURCE)
266 #define nfserr_moved cpu_to_be32(NFSERR_MOVED)
267 #define nfserr_nofilehandle cpu_to_be32(NFSERR_NOFILEHANDLE)
268 #define nfserr_minor_vers_mismatch cpu_to_be32(NFSERR_MINOR_VERS_MISMATCH)
269 #define nfserr_share_denied cpu_to_be32(NFSERR_SHARE_DENIED)
270 #define nfserr_stale_stateid cpu_to_be32(NFSERR_STALE_STATEID)
271 #define nfserr_old_stateid cpu_to_be32(NFSERR_OLD_STATEID)
272 #define nfserr_bad_stateid cpu_to_be32(NFSERR_BAD_STATEID)
273 #define nfserr_bad_seqid cpu_to_be32(NFSERR_BAD_SEQID)
274 #define nfserr_symlink cpu_to_be32(NFSERR_SYMLINK)
275 #define nfserr_not_same cpu_to_be32(NFSERR_NOT_SAME)
276 #define nfserr_lock_range cpu_to_be32(NFSERR_LOCK_RANGE)
277 #define nfserr_restorefh cpu_to_be32(NFSERR_RESTOREFH)
278 #define nfserr_attrnotsupp cpu_to_be32(NFSERR_ATTRNOTSUPP)
279 #define nfserr_bad_xdr cpu_to_be32(NFSERR_BAD_XDR)
280 #define nfserr_openmode cpu_to_be32(NFSERR_OPENMODE)
281 #define nfserr_badowner cpu_to_be32(NFSERR_BADOWNER)
282 #define nfserr_locks_held cpu_to_be32(NFSERR_LOCKS_HELD)
283 #define nfserr_op_illegal cpu_to_be32(NFSERR_OP_ILLEGAL)
284 #define nfserr_grace cpu_to_be32(NFSERR_GRACE)
285 #define nfserr_no_grace cpu_to_be32(NFSERR_NO_GRACE)
286 #define nfserr_reclaim_bad cpu_to_be32(NFSERR_RECLAIM_BAD)
287 #define nfserr_badname cpu_to_be32(NFSERR_BADNAME)
288 #define nfserr_admin_revoked cpu_to_be32(NFS4ERR_ADMIN_REVOKED)
289 #define nfserr_cb_path_down cpu_to_be32(NFSERR_CB_PATH_DOWN)
290 #define nfserr_locked cpu_to_be32(NFSERR_LOCKED)
291 #define nfserr_wrongsec cpu_to_be32(NFSERR_WRONGSEC)
292 #define nfserr_delay cpu_to_be32(NFS4ERR_DELAY)
293 #define nfserr_badiomode cpu_to_be32(NFS4ERR_BADIOMODE)
294 #define nfserr_badlayout cpu_to_be32(NFS4ERR_BADLAYOUT)
295 #define nfserr_bad_session_digest cpu_to_be32(NFS4ERR_BAD_SESSION_DIGEST)
296 #define nfserr_badsession cpu_to_be32(NFS4ERR_BADSESSION)
297 #define nfserr_badslot cpu_to_be32(NFS4ERR_BADSLOT)
298 #define nfserr_complete_already cpu_to_be32(NFS4ERR_COMPLETE_ALREADY)
299 #define nfserr_conn_not_bound_to_session cpu_to_be32(NFS4ERR_CONN_NOT_BOUND_TO_SESSION)
300 #define nfserr_deleg_already_wanted cpu_to_be32(NFS4ERR_DELEG_ALREADY_WANTED)
301 #define nfserr_back_chan_busy cpu_to_be32(NFS4ERR_BACK_CHAN_BUSY)
302 #define nfserr_layouttrylater cpu_to_be32(NFS4ERR_LAYOUTTRYLATER)
303 #define nfserr_layoutunavailable cpu_to_be32(NFS4ERR_LAYOUTUNAVAILABLE)
304 #define nfserr_nomatching_layout cpu_to_be32(NFS4ERR_NOMATCHING_LAYOUT)
305 #define nfserr_recallconflict cpu_to_be32(NFS4ERR_RECALLCONFLICT)
306 #define nfserr_unknown_layouttype cpu_to_be32(NFS4ERR_UNKNOWN_LAYOUTTYPE)
307 #define nfserr_seq_misordered cpu_to_be32(NFS4ERR_SEQ_MISORDERED)
308 #define nfserr_sequence_pos cpu_to_be32(NFS4ERR_SEQUENCE_POS)
309 #define nfserr_req_too_big cpu_to_be32(NFS4ERR_REQ_TOO_BIG)
310 #define nfserr_rep_too_big cpu_to_be32(NFS4ERR_REP_TOO_BIG)
311 #define nfserr_rep_too_big_to_cache cpu_to_be32(NFS4ERR_REP_TOO_BIG_TO_CACHE)
312 #define nfserr_retry_uncached_rep cpu_to_be32(NFS4ERR_RETRY_UNCACHED_REP)
313 #define nfserr_unsafe_compound cpu_to_be32(NFS4ERR_UNSAFE_COMPOUND)
314 #define nfserr_too_many_ops cpu_to_be32(NFS4ERR_TOO_MANY_OPS)
315 #define nfserr_op_not_in_session cpu_to_be32(NFS4ERR_OP_NOT_IN_SESSION)
316 #define nfserr_hash_alg_unsupp cpu_to_be32(NFS4ERR_HASH_ALG_UNSUPP)
317 #define nfserr_clientid_busy cpu_to_be32(NFS4ERR_CLIENTID_BUSY)
318 #define nfserr_pnfs_io_hole cpu_to_be32(NFS4ERR_PNFS_IO_HOLE)
319 #define nfserr_seq_false_retry cpu_to_be32(NFS4ERR_SEQ_FALSE_RETRY)
320 #define nfserr_bad_high_slot cpu_to_be32(NFS4ERR_BAD_HIGH_SLOT)
321 #define nfserr_deadsession cpu_to_be32(NFS4ERR_DEADSESSION)
322 #define nfserr_encr_alg_unsupp cpu_to_be32(NFS4ERR_ENCR_ALG_UNSUPP)
323 #define nfserr_pnfs_no_layout cpu_to_be32(NFS4ERR_PNFS_NO_LAYOUT)
324 #define nfserr_not_only_op cpu_to_be32(NFS4ERR_NOT_ONLY_OP)
325 #define nfserr_wrong_cred cpu_to_be32(NFS4ERR_WRONG_CRED)
326 #define nfserr_wrong_type cpu_to_be32(NFS4ERR_WRONG_TYPE)
327 #define nfserr_dirdeleg_unavail cpu_to_be32(NFS4ERR_DIRDELEG_UNAVAIL)
328 #define nfserr_reject_deleg cpu_to_be32(NFS4ERR_REJECT_DELEG)
329 #define nfserr_returnconflict cpu_to_be32(NFS4ERR_RETURNCONFLICT)
330 #define nfserr_deleg_revoked cpu_to_be32(NFS4ERR_DELEG_REVOKED)
331 #define nfserr_partner_notsupp cpu_to_be32(NFS4ERR_PARTNER_NOTSUPP)
332 #define nfserr_partner_no_auth cpu_to_be32(NFS4ERR_PARTNER_NO_AUTH)
333 #define nfserr_union_notsupp cpu_to_be32(NFS4ERR_UNION_NOTSUPP)
334 #define nfserr_offload_denied cpu_to_be32(NFS4ERR_OFFLOAD_DENIED)
335 #define nfserr_wrong_lfs cpu_to_be32(NFS4ERR_WRONG_LFS)
336 #define nfserr_badlabel cpu_to_be32(NFS4ERR_BADLABEL)
337 #define nfserr_file_open cpu_to_be32(NFS4ERR_FILE_OPEN)
338 #define nfserr_xattr2big cpu_to_be32(NFS4ERR_XATTR2BIG)
339 #define nfserr_noxattr cpu_to_be32(NFS4ERR_NOXATTR)
340
341 /*
342 * Error codes for internal use. We use enum to choose numbers that are
343 * not already assigned, then covert to be32 resulting in a number that
344 * cannot conflict with any existing be32 nfserr value.
345 */
346 enum {
347 /* end-of-file indicator in readdir */
348 NFSERR_EOF = NFS4ERR_FIRST_FREE,
349 #define nfserr_eof cpu_to_be32(NFSERR_EOF)
350
351 /* replay detected */
352 NFSERR_REPLAY_ME,
353 #define nfserr_replay_me cpu_to_be32(NFSERR_REPLAY_ME)
354
355 /* nfs41 replay detected */
356 NFSERR_REPLAY_CACHE,
357 #define nfserr_replay_cache cpu_to_be32(NFSERR_REPLAY_CACHE)
358
359 /* symlink found where dir expected - handled differently to
360 * other symlink found errors by NFSv3.
361 */
362 NFSERR_SYMLINK_NOT_DIR,
363 #define nfserr_symlink_not_dir cpu_to_be32(NFSERR_SYMLINK_NOT_DIR)
364 };
365
366 /* Check for dir entries '.' and '..' */
367 #define isdotent(n, l) (l < 3 && n[0] == '.' && (l == 1 || n[1] == '.'))
368
369 #ifdef CONFIG_NFSD_V4
370
371 /* before processing a COMPOUND operation, we have to check that there
372 * is enough space in the buffer for XDR encode to succeed. otherwise,
373 * we might process an operation with side effects, and be unable to
374 * tell the client that the operation succeeded.
375 *
376 * COMPOUND_SLACK_SPACE - this is the minimum bytes of buffer space
377 * needed to encode an "ordinary" _successful_ operation. (GETATTR,
378 * READ, READDIR, and READLINK have their own buffer checks.) if we
379 * fall below this level, we fail the next operation with NFS4ERR_RESOURCE.
380 *
381 * COMPOUND_ERR_SLACK_SPACE - this is the minimum bytes of buffer space
382 * needed to encode an operation which has failed with NFS4ERR_RESOURCE.
383 * care is taken to ensure that we never fall below this level for any
384 * reason.
385 */
386 #define COMPOUND_SLACK_SPACE 140 /* OP_GETFH */
387 #define COMPOUND_ERR_SLACK_SPACE 16 /* OP_SETATTR */
388
389 #define NFSD_LAUNDROMAT_MINTIMEOUT 1 /* seconds */
390 #define NFSD_COURTESY_CLIENT_TIMEOUT (24 * 60 * 60) /* seconds */
391 #define NFSD_CLIENT_MAX_TRIM_PER_RUN 128
392 #define NFS4_CLIENTS_PER_GB 1024
393 #define NFSD_DELEGRETURN_TIMEOUT (HZ / 34) /* 30ms */
394 #define NFSD_CB_GETATTR_TIMEOUT NFSD_DELEGRETURN_TIMEOUT
395
396 /*
397 * The following attributes are currently not supported by the NFSv4 server:
398 * ARCHIVE (deprecated anyway)
399 * HIDDEN (unlikely to be supported any time soon)
400 * MIMETYPE (unlikely to be supported any time soon)
401 * QUOTA_* (will be supported in a forthcoming patch)
402 * SYSTEM (unlikely to be supported any time soon)
403 * TIME_BACKUP (unlikely to be supported any time soon)
404 * TIME_CREATE (unlikely to be supported any time soon)
405 */
406 #define NFSD4_SUPPORTED_ATTRS_WORD0 \
407 (FATTR4_WORD0_SUPPORTED_ATTRS | FATTR4_WORD0_TYPE | FATTR4_WORD0_FH_EXPIRE_TYPE \
408 | FATTR4_WORD0_CHANGE | FATTR4_WORD0_SIZE | FATTR4_WORD0_LINK_SUPPORT \
409 | FATTR4_WORD0_SYMLINK_SUPPORT | FATTR4_WORD0_NAMED_ATTR | FATTR4_WORD0_FSID \
410 | FATTR4_WORD0_UNIQUE_HANDLES | FATTR4_WORD0_LEASE_TIME | FATTR4_WORD0_RDATTR_ERROR \
411 | FATTR4_WORD0_ACLSUPPORT | FATTR4_WORD0_CANSETTIME | FATTR4_WORD0_CASE_INSENSITIVE \
412 | FATTR4_WORD0_CASE_PRESERVING | FATTR4_WORD0_CHOWN_RESTRICTED \
413 | FATTR4_WORD0_FILEHANDLE | FATTR4_WORD0_FILEID | FATTR4_WORD0_FILES_AVAIL \
414 | FATTR4_WORD0_FILES_FREE | FATTR4_WORD0_FILES_TOTAL | FATTR4_WORD0_FS_LOCATIONS | FATTR4_WORD0_HOMOGENEOUS \
415 | FATTR4_WORD0_MAXFILESIZE | FATTR4_WORD0_MAXLINK | FATTR4_WORD0_MAXNAME \
416 | FATTR4_WORD0_MAXREAD | FATTR4_WORD0_MAXWRITE | FATTR4_WORD0_ACL)
417
418 #define NFSD4_SUPPORTED_ATTRS_WORD1 \
419 (FATTR4_WORD1_MODE | FATTR4_WORD1_NO_TRUNC | FATTR4_WORD1_NUMLINKS \
420 | FATTR4_WORD1_OWNER | FATTR4_WORD1_OWNER_GROUP | FATTR4_WORD1_RAWDEV \
421 | FATTR4_WORD1_SPACE_AVAIL | FATTR4_WORD1_SPACE_FREE | FATTR4_WORD1_SPACE_TOTAL \
422 | FATTR4_WORD1_SPACE_USED | FATTR4_WORD1_TIME_ACCESS | FATTR4_WORD1_TIME_ACCESS_SET \
423 | FATTR4_WORD1_TIME_DELTA | FATTR4_WORD1_TIME_METADATA | FATTR4_WORD1_TIME_CREATE \
424 | FATTR4_WORD1_TIME_MODIFY | FATTR4_WORD1_TIME_MODIFY_SET | FATTR4_WORD1_MOUNTED_ON_FILEID)
425
426 #define NFSD4_SUPPORTED_ATTRS_WORD2 0
427
428 /* 4.1 */
429 #ifdef CONFIG_NFSD_PNFS
430 #define PNFSD_SUPPORTED_ATTRS_WORD1 FATTR4_WORD1_FS_LAYOUT_TYPES
431 #define PNFSD_SUPPORTED_ATTRS_WORD2 \
432 (FATTR4_WORD2_LAYOUT_BLKSIZE | FATTR4_WORD2_LAYOUT_TYPES)
433 #else
434 #define PNFSD_SUPPORTED_ATTRS_WORD1 0
435 #define PNFSD_SUPPORTED_ATTRS_WORD2 0
436 #endif /* CONFIG_NFSD_PNFS */
437
438 #define NFSD4_1_SUPPORTED_ATTRS_WORD0 \
439 NFSD4_SUPPORTED_ATTRS_WORD0
440
441 #define NFSD4_1_SUPPORTED_ATTRS_WORD1 \
442 (NFSD4_SUPPORTED_ATTRS_WORD1 | PNFSD_SUPPORTED_ATTRS_WORD1)
443
444 #define NFSD4_1_SUPPORTED_ATTRS_WORD2 \
445 (NFSD4_SUPPORTED_ATTRS_WORD2 | PNFSD_SUPPORTED_ATTRS_WORD2 | \
446 FATTR4_WORD2_SUPPATTR_EXCLCREAT)
447
448 /* 4.2 */
449 #ifdef CONFIG_NFSD_V4_SECURITY_LABEL
450 #define NFSD4_2_SECURITY_ATTRS FATTR4_WORD2_SECURITY_LABEL
451 #else
452 #define NFSD4_2_SECURITY_ATTRS 0
453 #endif
454
455 #define NFSD4_2_SUPPORTED_ATTRS_WORD2 \
456 (NFSD4_1_SUPPORTED_ATTRS_WORD2 | \
457 FATTR4_WORD2_MODE_UMASK | \
458 NFSD4_2_SECURITY_ATTRS | \
459 FATTR4_WORD2_XATTR_SUPPORT | \
460 FATTR4_WORD2_TIME_DELEG_ACCESS | \
461 FATTR4_WORD2_TIME_DELEG_MODIFY | \
462 FATTR4_WORD2_OPEN_ARGUMENTS)
463
464 extern const u32 nfsd_suppattrs[3][3];
465
nfsd4_set_netaddr(struct sockaddr * addr,struct nfs42_netaddr * netaddr)466 static inline __be32 nfsd4_set_netaddr(struct sockaddr *addr,
467 struct nfs42_netaddr *netaddr)
468 {
469 struct sockaddr_in *sin = (struct sockaddr_in *)addr;
470 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)addr;
471 unsigned int port;
472 size_t ret_addr, ret_port;
473
474 switch (addr->sa_family) {
475 case AF_INET:
476 port = ntohs(sin->sin_port);
477 sprintf(netaddr->netid, "tcp");
478 netaddr->netid_len = 3;
479 break;
480 case AF_INET6:
481 port = ntohs(sin6->sin6_port);
482 sprintf(netaddr->netid, "tcp6");
483 netaddr->netid_len = 4;
484 break;
485 default:
486 return nfserr_inval;
487 }
488 ret_addr = rpc_ntop(addr, netaddr->addr, sizeof(netaddr->addr));
489 ret_port = snprintf(netaddr->addr + ret_addr,
490 RPCBIND_MAXUADDRLEN + 1 - ret_addr,
491 ".%u.%u", port >> 8, port & 0xff);
492 WARN_ON(ret_port >= RPCBIND_MAXUADDRLEN + 1 - ret_addr);
493 netaddr->addr_len = ret_addr + ret_port;
494 return 0;
495 }
496
bmval_is_subset(const u32 * bm1,const u32 * bm2)497 static inline bool bmval_is_subset(const u32 *bm1, const u32 *bm2)
498 {
499 return !((bm1[0] & ~bm2[0]) ||
500 (bm1[1] & ~bm2[1]) ||
501 (bm1[2] & ~bm2[2]));
502 }
503
nfsd_attrs_supported(u32 minorversion,const u32 * bmval)504 static inline bool nfsd_attrs_supported(u32 minorversion, const u32 *bmval)
505 {
506 return bmval_is_subset(bmval, nfsd_suppattrs[minorversion]);
507 }
508
509 /* These will return ERR_INVAL if specified in GETATTR or READDIR. */
510 #define NFSD_WRITEONLY_ATTRS_WORD1 \
511 (FATTR4_WORD1_TIME_ACCESS_SET | FATTR4_WORD1_TIME_MODIFY_SET)
512
513 /*
514 * These are the only attrs allowed in CREATE/OPEN/SETATTR. Don't add
515 * a writeable attribute here without also adding code to parse it to
516 * nfsd4_decode_fattr().
517 */
518 #define NFSD_WRITEABLE_ATTRS_WORD0 \
519 (FATTR4_WORD0_SIZE | FATTR4_WORD0_ACL)
520 #define NFSD_WRITEABLE_ATTRS_WORD1 \
521 (FATTR4_WORD1_MODE | FATTR4_WORD1_OWNER | FATTR4_WORD1_OWNER_GROUP \
522 | FATTR4_WORD1_TIME_ACCESS_SET | FATTR4_WORD1_TIME_CREATE \
523 | FATTR4_WORD1_TIME_MODIFY_SET)
524 #ifdef CONFIG_NFSD_V4_SECURITY_LABEL
525 #define MAYBE_FATTR4_WORD2_SECURITY_LABEL \
526 FATTR4_WORD2_SECURITY_LABEL
527 #else
528 #define MAYBE_FATTR4_WORD2_SECURITY_LABEL 0
529 #endif
530 #define NFSD_WRITEABLE_ATTRS_WORD2 \
531 (FATTR4_WORD2_MODE_UMASK \
532 | MAYBE_FATTR4_WORD2_SECURITY_LABEL \
533 | FATTR4_WORD2_TIME_DELEG_ACCESS \
534 | FATTR4_WORD2_TIME_DELEG_MODIFY \
535 )
536
537 #define NFSD_SUPPATTR_EXCLCREAT_WORD0 \
538 NFSD_WRITEABLE_ATTRS_WORD0
539 /*
540 * we currently store the exclusive create verifier in the v_{a,m}time
541 * attributes so the client can't set these at create time using EXCLUSIVE4_1
542 */
543 #define NFSD_SUPPATTR_EXCLCREAT_WORD1 \
544 (NFSD_WRITEABLE_ATTRS_WORD1 & \
545 ~(FATTR4_WORD1_TIME_ACCESS_SET | FATTR4_WORD1_TIME_MODIFY_SET))
546 #define NFSD_SUPPATTR_EXCLCREAT_WORD2 \
547 NFSD_WRITEABLE_ATTRS_WORD2
548
549 extern int nfsd4_is_junction(struct dentry *dentry);
550 extern int register_cld_notifier(void);
551 extern void unregister_cld_notifier(void);
552 #ifdef CONFIG_NFSD_V4_2_INTER_SSC
553 extern void nfsd4_ssc_init_umount_work(struct nfsd_net *nn);
554 #endif
555
556 extern void nfsd4_init_leases_net(struct nfsd_net *nn);
557
558 #else /* CONFIG_NFSD_V4 */
nfsd4_is_junction(struct dentry * dentry)559 static inline int nfsd4_is_junction(struct dentry *dentry)
560 {
561 return 0;
562 }
563
nfsd4_init_leases_net(struct nfsd_net * nn)564 static inline void nfsd4_init_leases_net(struct nfsd_net *nn) { };
565
566 #define register_cld_notifier() 0
567 #define unregister_cld_notifier() do { } while(0)
568
569 #endif /* CONFIG_NFSD_V4 */
570
571 #endif /* LINUX_NFSD_NFSD_H */
572