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 <[email protected]>
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 * Maximum blocksizes supported by daemon under various circumstances.
48 */
49 #define NFSSVC_MAXBLKSIZE RPCSVC_MAXPAYLOAD
50 /* NFSv2 is limited by the protocol specification, see RFC 1094 */
51 #define NFSSVC_MAXBLKSIZE_V2 (8*1024)
52
53
54 /*
55 * Largest number of bytes we need to allocate for an NFS
56 * call or reply. Used to control buffer sizes. We use
57 * the length of v3 WRITE, READDIR and READDIR replies
58 * which are an RPC header, up to 26 XDR units of reply
59 * data, and some page data.
60 *
61 * Note that accuracy here doesn't matter too much as the
62 * size is rounded up to a page size when allocating space.
63 */
64 #define NFSD_BUFSIZE ((RPC_MAX_HEADER_WITH_AUTH+26)*XDR_UNIT + NFSSVC_MAXBLKSIZE)
65
66 struct readdir_cd {
67 __be32 err; /* 0, nfserr, or nfserr_eof */
68 };
69
70 /* Maximum number of operations per session compound */
71 #define NFSD_MAX_OPS_PER_COMPOUND 50
72
73 struct nfsd_genl_rqstp {
74 struct sockaddr rq_daddr;
75 struct sockaddr rq_saddr;
76 unsigned long rq_flags;
77 ktime_t rq_stime;
78 __be32 rq_xid;
79 u32 rq_vers;
80 u32 rq_prog;
81 u32 rq_proc;
82
83 /* NFSv4 compound */
84 u32 rq_opcnt;
85 u32 rq_opnum[NFSD_MAX_OPS_PER_COMPOUND];
86 };
87
88 extern struct svc_program nfsd_programs[];
89 extern const struct svc_version nfsd_version2, nfsd_version3, nfsd_version4;
90 extern struct mutex nfsd_mutex;
91 extern atomic_t nfsd_th_cnt; /* number of available threads */
92
93 extern const struct seq_operations nfs_exports_op;
94
95 /*
96 * Common void argument and result helpers
97 */
98 struct nfsd_voidargs { };
99 struct nfsd_voidres { };
100 bool nfssvc_decode_voidarg(struct svc_rqst *rqstp,
101 struct xdr_stream *xdr);
102 bool nfssvc_encode_voidres(struct svc_rqst *rqstp,
103 struct xdr_stream *xdr);
104
105 /*
106 * Function prototypes.
107 */
108 int nfsd_svc(int n, int *nservers, struct net *net,
109 const struct cred *cred, const char *scope);
110 int nfsd_dispatch(struct svc_rqst *rqstp);
111
112 int nfsd_nrthreads(struct net *);
113 int nfsd_nrpools(struct net *);
114 int nfsd_get_nrthreads(int n, int *, struct net *);
115 int nfsd_set_nrthreads(int n, int *, struct net *);
116 void nfsd_shutdown_threads(struct net *net);
117
118 struct svc_rqst *nfsd_current_rqst(void);
119
120 struct nfsdfs_client {
121 struct kref cl_ref;
122 void (*cl_release)(struct kref *kref);
123 };
124
125 struct nfsdfs_client *get_nfsdfs_client(struct inode *);
126 struct dentry *nfsd_client_mkdir(struct nfsd_net *nn,
127 struct nfsdfs_client *ncl, u32 id,
128 const struct tree_descr *,
129 struct dentry **fdentries);
130 void nfsd_client_rmdir(struct dentry *dentry);
131
132
133 #if defined(CONFIG_NFSD_V2_ACL) || defined(CONFIG_NFSD_V3_ACL)
134 #ifdef CONFIG_NFSD_V2_ACL
135 extern const struct svc_version nfsd_acl_version2;
136 #else
137 #define nfsd_acl_version2 NULL
138 #endif
139 #ifdef CONFIG_NFSD_V3_ACL
140 extern const struct svc_version nfsd_acl_version3;
141 #else
142 #define nfsd_acl_version3 NULL
143 #endif
144 #endif
145
146 #if IS_ENABLED(CONFIG_NFS_LOCALIO)
147 extern const struct svc_version localio_version1;
148 #endif
149
150 struct nfsd_net;
151
152 enum vers_op {NFSD_SET, NFSD_CLEAR, NFSD_TEST, NFSD_AVAIL };
153 int nfsd_vers(struct nfsd_net *nn, int vers, enum vers_op change);
154 int nfsd_minorversion(struct nfsd_net *nn, u32 minorversion, enum vers_op change);
155 void nfsd_reset_versions(struct nfsd_net *nn);
156 int nfsd_create_serv(struct net *net);
157 void nfsd_destroy_serv(struct net *net);
158
159 extern int nfsd_max_blksize;
160
nfsd_v4client(struct svc_rqst * rq)161 static inline int nfsd_v4client(struct svc_rqst *rq)
162 {
163 return rq && rq->rq_prog == NFS_PROGRAM && rq->rq_vers == 4;
164 }
165 static inline struct user_namespace *
nfsd_user_namespace(const struct svc_rqst * rqstp)166 nfsd_user_namespace(const struct svc_rqst *rqstp)
167 {
168 const struct cred *cred = rqstp->rq_xprt->xpt_cred;
169 return cred ? cred->user_ns : &init_user_ns;
170 }
171
172 /*
173 * NFSv4 State
174 */
175 #ifdef CONFIG_NFSD_V4
176 extern unsigned long max_delegations;
177 int nfsd4_init_slabs(void);
178 void nfsd4_free_slabs(void);
179 int nfs4_state_start(void);
180 int nfs4_state_start_net(struct net *net);
181 void nfs4_state_shutdown(void);
182 void nfs4_state_shutdown_net(struct net *net);
183 int nfs4_reset_recoverydir(char *recdir);
184 char * nfs4_recoverydir(void);
185 bool nfsd4_spo_must_allow(struct svc_rqst *rqstp);
186 int nfsd4_create_laundry_wq(void);
187 void nfsd4_destroy_laundry_wq(void);
188 bool nfsd_wait_for_delegreturn(struct svc_rqst *rqstp, struct inode *inode);
189 #else
nfsd4_init_slabs(void)190 static inline int nfsd4_init_slabs(void) { return 0; }
nfsd4_free_slabs(void)191 static inline void nfsd4_free_slabs(void) { }
nfs4_state_start(void)192 static inline int nfs4_state_start(void) { return 0; }
nfs4_state_start_net(struct net * net)193 static inline int nfs4_state_start_net(struct net *net) { return 0; }
nfs4_state_shutdown(void)194 static inline void nfs4_state_shutdown(void) { }
nfs4_state_shutdown_net(struct net * net)195 static inline void nfs4_state_shutdown_net(struct net *net) { }
nfs4_reset_recoverydir(char * recdir)196 static inline int nfs4_reset_recoverydir(char *recdir) { return 0; }
nfs4_recoverydir(void)197 static inline char * nfs4_recoverydir(void) {return NULL; }
nfsd4_spo_must_allow(struct svc_rqst * rqstp)198 static inline bool nfsd4_spo_must_allow(struct svc_rqst *rqstp)
199 {
200 return false;
201 }
nfsd4_create_laundry_wq(void)202 static inline int nfsd4_create_laundry_wq(void) { return 0; };
nfsd4_destroy_laundry_wq(void)203 static inline void nfsd4_destroy_laundry_wq(void) {};
nfsd_wait_for_delegreturn(struct svc_rqst * rqstp,struct inode * inode)204 static inline bool nfsd_wait_for_delegreturn(struct svc_rqst *rqstp,
205 struct inode *inode)
206 {
207 return false;
208 }
209 #endif
210
211 /*
212 * lockd binding
213 */
214 void nfsd_lockd_init(void);
215 void nfsd_lockd_shutdown(void);
216
217
218 /*
219 * These macros provide pre-xdr'ed values for faster operation.
220 */
221 #define nfs_ok cpu_to_be32(NFS_OK)
222 #define nfserr_perm cpu_to_be32(NFSERR_PERM)
223 #define nfserr_noent cpu_to_be32(NFSERR_NOENT)
224 #define nfserr_io cpu_to_be32(NFSERR_IO)
225 #define nfserr_nxio cpu_to_be32(NFSERR_NXIO)
226 #define nfserr_eagain cpu_to_be32(NFSERR_EAGAIN)
227 #define nfserr_acces cpu_to_be32(NFSERR_ACCES)
228 #define nfserr_exist cpu_to_be32(NFSERR_EXIST)
229 #define nfserr_xdev cpu_to_be32(NFSERR_XDEV)
230 #define nfserr_nodev cpu_to_be32(NFSERR_NODEV)
231 #define nfserr_notdir cpu_to_be32(NFSERR_NOTDIR)
232 #define nfserr_isdir cpu_to_be32(NFSERR_ISDIR)
233 #define nfserr_inval cpu_to_be32(NFSERR_INVAL)
234 #define nfserr_fbig cpu_to_be32(NFSERR_FBIG)
235 #define nfserr_nospc cpu_to_be32(NFSERR_NOSPC)
236 #define nfserr_rofs cpu_to_be32(NFSERR_ROFS)
237 #define nfserr_mlink cpu_to_be32(NFSERR_MLINK)
238 #define nfserr_nametoolong cpu_to_be32(NFSERR_NAMETOOLONG)
239 #define nfserr_notempty cpu_to_be32(NFSERR_NOTEMPTY)
240 #define nfserr_dquot cpu_to_be32(NFSERR_DQUOT)
241 #define nfserr_stale cpu_to_be32(NFSERR_STALE)
242 #define nfserr_remote cpu_to_be32(NFSERR_REMOTE)
243 #define nfserr_wflush cpu_to_be32(NFSERR_WFLUSH)
244 #define nfserr_badhandle cpu_to_be32(NFSERR_BADHANDLE)
245 #define nfserr_notsync cpu_to_be32(NFSERR_NOT_SYNC)
246 #define nfserr_badcookie cpu_to_be32(NFSERR_BAD_COOKIE)
247 #define nfserr_notsupp cpu_to_be32(NFSERR_NOTSUPP)
248 #define nfserr_toosmall cpu_to_be32(NFSERR_TOOSMALL)
249 #define nfserr_serverfault cpu_to_be32(NFSERR_SERVERFAULT)
250 #define nfserr_badtype cpu_to_be32(NFSERR_BADTYPE)
251 #define nfserr_jukebox cpu_to_be32(NFSERR_JUKEBOX)
252 #define nfserr_denied cpu_to_be32(NFSERR_DENIED)
253 #define nfserr_deadlock cpu_to_be32(NFSERR_DEADLOCK)
254 #define nfserr_expired cpu_to_be32(NFSERR_EXPIRED)
255 #define nfserr_bad_cookie cpu_to_be32(NFSERR_BAD_COOKIE)
256 #define nfserr_same cpu_to_be32(NFSERR_SAME)
257 #define nfserr_clid_inuse cpu_to_be32(NFSERR_CLID_INUSE)
258 #define nfserr_stale_clientid cpu_to_be32(NFSERR_STALE_CLIENTID)
259 #define nfserr_resource cpu_to_be32(NFSERR_RESOURCE)
260 #define nfserr_moved cpu_to_be32(NFSERR_MOVED)
261 #define nfserr_nofilehandle cpu_to_be32(NFSERR_NOFILEHANDLE)
262 #define nfserr_minor_vers_mismatch cpu_to_be32(NFSERR_MINOR_VERS_MISMATCH)
263 #define nfserr_share_denied cpu_to_be32(NFSERR_SHARE_DENIED)
264 #define nfserr_stale_stateid cpu_to_be32(NFSERR_STALE_STATEID)
265 #define nfserr_old_stateid cpu_to_be32(NFSERR_OLD_STATEID)
266 #define nfserr_bad_stateid cpu_to_be32(NFSERR_BAD_STATEID)
267 #define nfserr_bad_seqid cpu_to_be32(NFSERR_BAD_SEQID)
268 #define nfserr_symlink cpu_to_be32(NFSERR_SYMLINK)
269 #define nfserr_not_same cpu_to_be32(NFSERR_NOT_SAME)
270 #define nfserr_lock_range cpu_to_be32(NFSERR_LOCK_RANGE)
271 #define nfserr_restorefh cpu_to_be32(NFSERR_RESTOREFH)
272 #define nfserr_attrnotsupp cpu_to_be32(NFSERR_ATTRNOTSUPP)
273 #define nfserr_bad_xdr cpu_to_be32(NFSERR_BAD_XDR)
274 #define nfserr_openmode cpu_to_be32(NFSERR_OPENMODE)
275 #define nfserr_badowner cpu_to_be32(NFSERR_BADOWNER)
276 #define nfserr_locks_held cpu_to_be32(NFSERR_LOCKS_HELD)
277 #define nfserr_op_illegal cpu_to_be32(NFSERR_OP_ILLEGAL)
278 #define nfserr_grace cpu_to_be32(NFSERR_GRACE)
279 #define nfserr_no_grace cpu_to_be32(NFSERR_NO_GRACE)
280 #define nfserr_reclaim_bad cpu_to_be32(NFSERR_RECLAIM_BAD)
281 #define nfserr_badname cpu_to_be32(NFSERR_BADNAME)
282 #define nfserr_admin_revoked cpu_to_be32(NFS4ERR_ADMIN_REVOKED)
283 #define nfserr_cb_path_down cpu_to_be32(NFSERR_CB_PATH_DOWN)
284 #define nfserr_locked cpu_to_be32(NFSERR_LOCKED)
285 #define nfserr_wrongsec cpu_to_be32(NFSERR_WRONGSEC)
286 #define nfserr_badiomode cpu_to_be32(NFS4ERR_BADIOMODE)
287 #define nfserr_badlayout cpu_to_be32(NFS4ERR_BADLAYOUT)
288 #define nfserr_bad_session_digest cpu_to_be32(NFS4ERR_BAD_SESSION_DIGEST)
289 #define nfserr_badsession cpu_to_be32(NFS4ERR_BADSESSION)
290 #define nfserr_badslot cpu_to_be32(NFS4ERR_BADSLOT)
291 #define nfserr_complete_already cpu_to_be32(NFS4ERR_COMPLETE_ALREADY)
292 #define nfserr_conn_not_bound_to_session cpu_to_be32(NFS4ERR_CONN_NOT_BOUND_TO_SESSION)
293 #define nfserr_deleg_already_wanted cpu_to_be32(NFS4ERR_DELEG_ALREADY_WANTED)
294 #define nfserr_back_chan_busy cpu_to_be32(NFS4ERR_BACK_CHAN_BUSY)
295 #define nfserr_layouttrylater cpu_to_be32(NFS4ERR_LAYOUTTRYLATER)
296 #define nfserr_layoutunavailable cpu_to_be32(NFS4ERR_LAYOUTUNAVAILABLE)
297 #define nfserr_nomatching_layout cpu_to_be32(NFS4ERR_NOMATCHING_LAYOUT)
298 #define nfserr_recallconflict cpu_to_be32(NFS4ERR_RECALLCONFLICT)
299 #define nfserr_unknown_layouttype cpu_to_be32(NFS4ERR_UNKNOWN_LAYOUTTYPE)
300 #define nfserr_seq_misordered cpu_to_be32(NFS4ERR_SEQ_MISORDERED)
301 #define nfserr_sequence_pos cpu_to_be32(NFS4ERR_SEQUENCE_POS)
302 #define nfserr_req_too_big cpu_to_be32(NFS4ERR_REQ_TOO_BIG)
303 #define nfserr_rep_too_big cpu_to_be32(NFS4ERR_REP_TOO_BIG)
304 #define nfserr_rep_too_big_to_cache cpu_to_be32(NFS4ERR_REP_TOO_BIG_TO_CACHE)
305 #define nfserr_retry_uncached_rep cpu_to_be32(NFS4ERR_RETRY_UNCACHED_REP)
306 #define nfserr_unsafe_compound cpu_to_be32(NFS4ERR_UNSAFE_COMPOUND)
307 #define nfserr_too_many_ops cpu_to_be32(NFS4ERR_TOO_MANY_OPS)
308 #define nfserr_op_not_in_session cpu_to_be32(NFS4ERR_OP_NOT_IN_SESSION)
309 #define nfserr_hash_alg_unsupp cpu_to_be32(NFS4ERR_HASH_ALG_UNSUPP)
310 #define nfserr_clientid_busy cpu_to_be32(NFS4ERR_CLIENTID_BUSY)
311 #define nfserr_pnfs_io_hole cpu_to_be32(NFS4ERR_PNFS_IO_HOLE)
312 #define nfserr_seq_false_retry cpu_to_be32(NFS4ERR_SEQ_FALSE_RETRY)
313 #define nfserr_bad_high_slot cpu_to_be32(NFS4ERR_BAD_HIGH_SLOT)
314 #define nfserr_deadsession cpu_to_be32(NFS4ERR_DEADSESSION)
315 #define nfserr_encr_alg_unsupp cpu_to_be32(NFS4ERR_ENCR_ALG_UNSUPP)
316 #define nfserr_pnfs_no_layout cpu_to_be32(NFS4ERR_PNFS_NO_LAYOUT)
317 #define nfserr_not_only_op cpu_to_be32(NFS4ERR_NOT_ONLY_OP)
318 #define nfserr_wrong_cred cpu_to_be32(NFS4ERR_WRONG_CRED)
319 #define nfserr_wrong_type cpu_to_be32(NFS4ERR_WRONG_TYPE)
320 #define nfserr_dirdeleg_unavail cpu_to_be32(NFS4ERR_DIRDELEG_UNAVAIL)
321 #define nfserr_reject_deleg cpu_to_be32(NFS4ERR_REJECT_DELEG)
322 #define nfserr_returnconflict cpu_to_be32(NFS4ERR_RETURNCONFLICT)
323 #define nfserr_deleg_revoked cpu_to_be32(NFS4ERR_DELEG_REVOKED)
324 #define nfserr_partner_notsupp cpu_to_be32(NFS4ERR_PARTNER_NOTSUPP)
325 #define nfserr_partner_no_auth cpu_to_be32(NFS4ERR_PARTNER_NO_AUTH)
326 #define nfserr_union_notsupp cpu_to_be32(NFS4ERR_UNION_NOTSUPP)
327 #define nfserr_offload_denied cpu_to_be32(NFS4ERR_OFFLOAD_DENIED)
328 #define nfserr_wrong_lfs cpu_to_be32(NFS4ERR_WRONG_LFS)
329 #define nfserr_badlabel cpu_to_be32(NFS4ERR_BADLABEL)
330 #define nfserr_file_open cpu_to_be32(NFS4ERR_FILE_OPEN)
331 #define nfserr_xattr2big cpu_to_be32(NFS4ERR_XATTR2BIG)
332 #define nfserr_noxattr cpu_to_be32(NFS4ERR_NOXATTR)
333
334 /*
335 * Error codes for internal use. We use enum to choose numbers that are
336 * not already assigned, then covert to be32 resulting in a number that
337 * cannot conflict with any existing be32 nfserr value.
338 */
339 enum {
340 NFSERR_DROPIT = NFS4ERR_FIRST_FREE,
341 /* if a request fails due to kmalloc failure, it gets dropped.
342 * Client should resend eventually
343 */
344 #define nfserr_dropit cpu_to_be32(NFSERR_DROPIT)
345
346 /* end-of-file indicator in readdir */
347 NFSERR_EOF,
348 #define nfserr_eof cpu_to_be32(NFSERR_EOF)
349
350 /* replay detected */
351 NFSERR_REPLAY_ME,
352 #define nfserr_replay_me cpu_to_be32(NFSERR_REPLAY_ME)
353
354 /* nfs41 replay detected */
355 NFSERR_REPLAY_CACHE,
356 #define nfserr_replay_cache cpu_to_be32(NFSERR_REPLAY_CACHE)
357
358 /* symlink found where dir expected - handled differently to
359 * other symlink found errors by NFSv3.
360 */
361 NFSERR_SYMLINK_NOT_DIR,
362 #define nfserr_symlink_not_dir cpu_to_be32(NFSERR_SYMLINK_NOT_DIR)
363 };
364
365 /* Check for dir entries '.' and '..' */
366 #define isdotent(n, l) (l < 3 && n[0] == '.' && (l == 1 || n[1] == '.'))
367
368 #ifdef CONFIG_NFSD_V4
369
370 /* before processing a COMPOUND operation, we have to check that there
371 * is enough space in the buffer for XDR encode to succeed. otherwise,
372 * we might process an operation with side effects, and be unable to
373 * tell the client that the operation succeeded.
374 *
375 * COMPOUND_SLACK_SPACE - this is the minimum bytes of buffer space
376 * needed to encode an "ordinary" _successful_ operation. (GETATTR,
377 * READ, READDIR, and READLINK have their own buffer checks.) if we
378 * fall below this level, we fail the next operation with NFS4ERR_RESOURCE.
379 *
380 * COMPOUND_ERR_SLACK_SPACE - this is the minimum bytes of buffer space
381 * needed to encode an operation which has failed with NFS4ERR_RESOURCE.
382 * care is taken to ensure that we never fall below this level for any
383 * reason.
384 */
385 #define COMPOUND_SLACK_SPACE 140 /* OP_GETFH */
386 #define COMPOUND_ERR_SLACK_SPACE 16 /* OP_SETATTR */
387
388 #define NFSD_LAUNDROMAT_MINTIMEOUT 1 /* seconds */
389 #define NFSD_COURTESY_CLIENT_TIMEOUT (24 * 60 * 60) /* seconds */
390 #define NFSD_CLIENT_MAX_TRIM_PER_RUN 128
391 #define NFS4_CLIENTS_PER_GB 1024
392 #define NFSD_DELEGRETURN_TIMEOUT (HZ / 34) /* 30ms */
393 #define NFSD_CB_GETATTR_TIMEOUT NFSD_DELEGRETURN_TIMEOUT
394
395 /*
396 * The following attributes are currently not supported by the NFSv4 server:
397 * ARCHIVE (deprecated anyway)
398 * HIDDEN (unlikely to be supported any time soon)
399 * MIMETYPE (unlikely to be supported any time soon)
400 * QUOTA_* (will be supported in a forthcoming patch)
401 * SYSTEM (unlikely to be supported any time soon)
402 * TIME_BACKUP (unlikely to be supported any time soon)
403 * TIME_CREATE (unlikely to be supported any time soon)
404 */
405 #define NFSD4_SUPPORTED_ATTRS_WORD0 \
406 (FATTR4_WORD0_SUPPORTED_ATTRS | FATTR4_WORD0_TYPE | FATTR4_WORD0_FH_EXPIRE_TYPE \
407 | FATTR4_WORD0_CHANGE | FATTR4_WORD0_SIZE | FATTR4_WORD0_LINK_SUPPORT \
408 | FATTR4_WORD0_SYMLINK_SUPPORT | FATTR4_WORD0_NAMED_ATTR | FATTR4_WORD0_FSID \
409 | FATTR4_WORD0_UNIQUE_HANDLES | FATTR4_WORD0_LEASE_TIME | FATTR4_WORD0_RDATTR_ERROR \
410 | FATTR4_WORD0_ACLSUPPORT | FATTR4_WORD0_CANSETTIME | FATTR4_WORD0_CASE_INSENSITIVE \
411 | FATTR4_WORD0_CASE_PRESERVING | FATTR4_WORD0_CHOWN_RESTRICTED \
412 | FATTR4_WORD0_FILEHANDLE | FATTR4_WORD0_FILEID | FATTR4_WORD0_FILES_AVAIL \
413 | FATTR4_WORD0_FILES_FREE | FATTR4_WORD0_FILES_TOTAL | FATTR4_WORD0_FS_LOCATIONS | FATTR4_WORD0_HOMOGENEOUS \
414 | FATTR4_WORD0_MAXFILESIZE | FATTR4_WORD0_MAXLINK | FATTR4_WORD0_MAXNAME \
415 | FATTR4_WORD0_MAXREAD | FATTR4_WORD0_MAXWRITE | FATTR4_WORD0_ACL)
416
417 #define NFSD4_SUPPORTED_ATTRS_WORD1 \
418 (FATTR4_WORD1_MODE | FATTR4_WORD1_NO_TRUNC | FATTR4_WORD1_NUMLINKS \
419 | FATTR4_WORD1_OWNER | FATTR4_WORD1_OWNER_GROUP | FATTR4_WORD1_RAWDEV \
420 | FATTR4_WORD1_SPACE_AVAIL | FATTR4_WORD1_SPACE_FREE | FATTR4_WORD1_SPACE_TOTAL \
421 | FATTR4_WORD1_SPACE_USED | FATTR4_WORD1_TIME_ACCESS | FATTR4_WORD1_TIME_ACCESS_SET \
422 | FATTR4_WORD1_TIME_DELTA | FATTR4_WORD1_TIME_METADATA | FATTR4_WORD1_TIME_CREATE \
423 | FATTR4_WORD1_TIME_MODIFY | FATTR4_WORD1_TIME_MODIFY_SET | FATTR4_WORD1_MOUNTED_ON_FILEID)
424
425 #define NFSD4_SUPPORTED_ATTRS_WORD2 0
426
427 /* 4.1 */
428 #ifdef CONFIG_NFSD_PNFS
429 #define PNFSD_SUPPORTED_ATTRS_WORD1 FATTR4_WORD1_FS_LAYOUT_TYPES
430 #define PNFSD_SUPPORTED_ATTRS_WORD2 \
431 (FATTR4_WORD2_LAYOUT_BLKSIZE | FATTR4_WORD2_LAYOUT_TYPES)
432 #else
433 #define PNFSD_SUPPORTED_ATTRS_WORD1 0
434 #define PNFSD_SUPPORTED_ATTRS_WORD2 0
435 #endif /* CONFIG_NFSD_PNFS */
436
437 #define NFSD4_1_SUPPORTED_ATTRS_WORD0 \
438 NFSD4_SUPPORTED_ATTRS_WORD0
439
440 #define NFSD4_1_SUPPORTED_ATTRS_WORD1 \
441 (NFSD4_SUPPORTED_ATTRS_WORD1 | PNFSD_SUPPORTED_ATTRS_WORD1)
442
443 #define NFSD4_1_SUPPORTED_ATTRS_WORD2 \
444 (NFSD4_SUPPORTED_ATTRS_WORD2 | PNFSD_SUPPORTED_ATTRS_WORD2 | \
445 FATTR4_WORD2_SUPPATTR_EXCLCREAT)
446
447 /* 4.2 */
448 #ifdef CONFIG_NFSD_V4_SECURITY_LABEL
449 #define NFSD4_2_SECURITY_ATTRS FATTR4_WORD2_SECURITY_LABEL
450 #else
451 #define NFSD4_2_SECURITY_ATTRS 0
452 #endif
453
454 #define NFSD4_2_SUPPORTED_ATTRS_WORD2 \
455 (NFSD4_1_SUPPORTED_ATTRS_WORD2 | \
456 FATTR4_WORD2_MODE_UMASK | \
457 NFSD4_2_SECURITY_ATTRS | \
458 FATTR4_WORD2_XATTR_SUPPORT | \
459 FATTR4_WORD2_TIME_DELEG_ACCESS | \
460 FATTR4_WORD2_TIME_DELEG_MODIFY | \
461 FATTR4_WORD2_OPEN_ARGUMENTS)
462
463 extern const u32 nfsd_suppattrs[3][3];
464
nfsd4_set_netaddr(struct sockaddr * addr,struct nfs42_netaddr * netaddr)465 static inline __be32 nfsd4_set_netaddr(struct sockaddr *addr,
466 struct nfs42_netaddr *netaddr)
467 {
468 struct sockaddr_in *sin = (struct sockaddr_in *)addr;
469 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)addr;
470 unsigned int port;
471 size_t ret_addr, ret_port;
472
473 switch (addr->sa_family) {
474 case AF_INET:
475 port = ntohs(sin->sin_port);
476 sprintf(netaddr->netid, "tcp");
477 netaddr->netid_len = 3;
478 break;
479 case AF_INET6:
480 port = ntohs(sin6->sin6_port);
481 sprintf(netaddr->netid, "tcp6");
482 netaddr->netid_len = 4;
483 break;
484 default:
485 return nfserr_inval;
486 }
487 ret_addr = rpc_ntop(addr, netaddr->addr, sizeof(netaddr->addr));
488 ret_port = snprintf(netaddr->addr + ret_addr,
489 RPCBIND_MAXUADDRLEN + 1 - ret_addr,
490 ".%u.%u", port >> 8, port & 0xff);
491 WARN_ON(ret_port >= RPCBIND_MAXUADDRLEN + 1 - ret_addr);
492 netaddr->addr_len = ret_addr + ret_port;
493 return 0;
494 }
495
bmval_is_subset(const u32 * bm1,const u32 * bm2)496 static inline bool bmval_is_subset(const u32 *bm1, const u32 *bm2)
497 {
498 return !((bm1[0] & ~bm2[0]) ||
499 (bm1[1] & ~bm2[1]) ||
500 (bm1[2] & ~bm2[2]));
501 }
502
nfsd_attrs_supported(u32 minorversion,const u32 * bmval)503 static inline bool nfsd_attrs_supported(u32 minorversion, const u32 *bmval)
504 {
505 return bmval_is_subset(bmval, nfsd_suppattrs[minorversion]);
506 }
507
508 /* These will return ERR_INVAL if specified in GETATTR or READDIR. */
509 #define NFSD_WRITEONLY_ATTRS_WORD1 \
510 (FATTR4_WORD1_TIME_ACCESS_SET | FATTR4_WORD1_TIME_MODIFY_SET)
511
512 /*
513 * These are the only attrs allowed in CREATE/OPEN/SETATTR. Don't add
514 * a writeable attribute here without also adding code to parse it to
515 * nfsd4_decode_fattr().
516 */
517 #define NFSD_WRITEABLE_ATTRS_WORD0 \
518 (FATTR4_WORD0_SIZE | FATTR4_WORD0_ACL)
519 #define NFSD_WRITEABLE_ATTRS_WORD1 \
520 (FATTR4_WORD1_MODE | FATTR4_WORD1_OWNER | FATTR4_WORD1_OWNER_GROUP \
521 | FATTR4_WORD1_TIME_ACCESS_SET | FATTR4_WORD1_TIME_CREATE \
522 | FATTR4_WORD1_TIME_MODIFY_SET)
523 #ifdef CONFIG_NFSD_V4_SECURITY_LABEL
524 #define MAYBE_FATTR4_WORD2_SECURITY_LABEL \
525 FATTR4_WORD2_SECURITY_LABEL
526 #else
527 #define MAYBE_FATTR4_WORD2_SECURITY_LABEL 0
528 #endif
529 #define NFSD_WRITEABLE_ATTRS_WORD2 \
530 (FATTR4_WORD2_MODE_UMASK \
531 | MAYBE_FATTR4_WORD2_SECURITY_LABEL \
532 | FATTR4_WORD2_TIME_DELEG_ACCESS \
533 | FATTR4_WORD2_TIME_DELEG_MODIFY \
534 )
535
536 #define NFSD_SUPPATTR_EXCLCREAT_WORD0 \
537 NFSD_WRITEABLE_ATTRS_WORD0
538 /*
539 * we currently store the exclusive create verifier in the v_{a,m}time
540 * attributes so the client can't set these at create time using EXCLUSIVE4_1
541 */
542 #define NFSD_SUPPATTR_EXCLCREAT_WORD1 \
543 (NFSD_WRITEABLE_ATTRS_WORD1 & \
544 ~(FATTR4_WORD1_TIME_ACCESS_SET | FATTR4_WORD1_TIME_MODIFY_SET))
545 #define NFSD_SUPPATTR_EXCLCREAT_WORD2 \
546 NFSD_WRITEABLE_ATTRS_WORD2
547
548 extern int nfsd4_is_junction(struct dentry *dentry);
549 extern int register_cld_notifier(void);
550 extern void unregister_cld_notifier(void);
551 #ifdef CONFIG_NFSD_V4_2_INTER_SSC
552 extern void nfsd4_ssc_init_umount_work(struct nfsd_net *nn);
553 #endif
554
555 extern void nfsd4_init_leases_net(struct nfsd_net *nn);
556
557 #else /* CONFIG_NFSD_V4 */
nfsd4_is_junction(struct dentry * dentry)558 static inline int nfsd4_is_junction(struct dentry *dentry)
559 {
560 return 0;
561 }
562
nfsd4_init_leases_net(struct nfsd_net * nn)563 static inline void nfsd4_init_leases_net(struct nfsd_net *nn) { };
564
565 #define register_cld_notifier() 0
566 #define unregister_cld_notifier() do { } while(0)
567
568 #endif /* CONFIG_NFSD_V4 */
569
570 #endif /* LINUX_NFSD_NFSD_H */
571