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 "netns.h"
27 #include "export.h"
28 #include "stats.h"
29
30 #undef ifdebug
31 #ifdef CONFIG_SUNRPC_DEBUG
32 # define ifdebug(flag) if (nfsd_debug & NFSDDBG_##flag)
33 #else
34 # define ifdebug(flag) if (0)
35 #endif
36
37 /*
38 * nfsd version
39 */
40 #define NFSD_SUPPORTED_MINOR_VERSION 2
41 /*
42 * Maximum blocksizes supported by daemon under various circumstances.
43 */
44 #define NFSSVC_MAXBLKSIZE RPCSVC_MAXPAYLOAD
45 /* NFSv2 is limited by the protocol specification, see RFC 1094 */
46 #define NFSSVC_MAXBLKSIZE_V2 (8*1024)
47
48
49 /*
50 * Largest number of bytes we need to allocate for an NFS
51 * call or reply. Used to control buffer sizes. We use
52 * the length of v3 WRITE, READDIR and READDIR replies
53 * which are an RPC header, up to 26 XDR units of reply
54 * data, and some page data.
55 *
56 * Note that accuracy here doesn't matter too much as the
57 * size is rounded up to a page size when allocating space.
58 */
59 #define NFSD_BUFSIZE ((RPC_MAX_HEADER_WITH_AUTH+26)*XDR_UNIT + NFSSVC_MAXBLKSIZE)
60
61 struct readdir_cd {
62 __be32 err; /* 0, nfserr, or nfserr_eof */
63 };
64
65
66 extern struct svc_program nfsd_program;
67 extern const struct svc_version nfsd_version2, nfsd_version3, 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 * Common void argument and result helpers
77 */
78 struct nfsd_voidargs { };
79 struct nfsd_voidres { };
80 bool nfssvc_decode_voidarg(struct svc_rqst *rqstp,
81 struct xdr_stream *xdr);
82 bool nfssvc_encode_voidres(struct svc_rqst *rqstp,
83 struct xdr_stream *xdr);
84
85 /*
86 * Function prototypes.
87 */
88 int nfsd_svc(int nrservs, struct net *net, const struct cred *cred);
89 int nfsd_dispatch(struct svc_rqst *rqstp);
90
91 int nfsd_nrthreads(struct net *);
92 int nfsd_nrpools(struct net *);
93 int nfsd_get_nrthreads(int n, int *, struct net *);
94 int nfsd_set_nrthreads(int n, int *, struct net *);
95 int nfsd_pool_stats_open(struct inode *, struct file *);
96 int nfsd_pool_stats_release(struct inode *, struct file *);
97 void nfsd_shutdown_threads(struct net *net);
98
nfsd_put(struct net * net)99 static inline void nfsd_put(struct net *net)
100 {
101 struct nfsd_net *nn = net_generic(net, nfsd_net_id);
102
103 svc_put(nn->nfsd_serv);
104 }
105
106 bool i_am_nfsd(void);
107
108 struct nfsdfs_client {
109 struct kref cl_ref;
110 void (*cl_release)(struct kref *kref);
111 };
112
113 struct nfsdfs_client *get_nfsdfs_client(struct inode *);
114 struct dentry *nfsd_client_mkdir(struct nfsd_net *nn,
115 struct nfsdfs_client *ncl, u32 id,
116 const struct tree_descr *,
117 struct dentry **fdentries);
118 void nfsd_client_rmdir(struct dentry *dentry);
119
120
121 #if defined(CONFIG_NFSD_V2_ACL) || defined(CONFIG_NFSD_V3_ACL)
122 #ifdef CONFIG_NFSD_V2_ACL
123 extern const struct svc_version nfsd_acl_version2;
124 #else
125 #define nfsd_acl_version2 NULL
126 #endif
127 #ifdef CONFIG_NFSD_V3_ACL
128 extern const struct svc_version nfsd_acl_version3;
129 #else
130 #define nfsd_acl_version3 NULL
131 #endif
132 #endif
133
134 struct nfsd_net;
135
136 enum vers_op {NFSD_SET, NFSD_CLEAR, NFSD_TEST, NFSD_AVAIL };
137 int nfsd_vers(struct nfsd_net *nn, int vers, enum vers_op change);
138 int nfsd_minorversion(struct nfsd_net *nn, u32 minorversion, enum vers_op change);
139 void nfsd_reset_versions(struct nfsd_net *nn);
140 int nfsd_create_serv(struct net *net);
141
142 extern int nfsd_max_blksize;
143
nfsd_v4client(struct svc_rqst * rq)144 static inline int nfsd_v4client(struct svc_rqst *rq)
145 {
146 return rq->rq_prog == NFS_PROGRAM && rq->rq_vers == 4;
147 }
148 static inline struct user_namespace *
nfsd_user_namespace(const struct svc_rqst * rqstp)149 nfsd_user_namespace(const struct svc_rqst *rqstp)
150 {
151 const struct cred *cred = rqstp->rq_xprt->xpt_cred;
152 return cred ? cred->user_ns : &init_user_ns;
153 }
154
155 /*
156 * NFSv4 State
157 */
158 #ifdef CONFIG_NFSD_V4
159 extern unsigned long max_delegations;
160 int nfsd4_init_slabs(void);
161 void nfsd4_free_slabs(void);
162 int nfs4_state_start(void);
163 int nfs4_state_start_net(struct net *net);
164 void nfs4_state_shutdown(void);
165 void nfs4_state_shutdown_net(struct net *net);
166 int nfs4_reset_recoverydir(char *recdir);
167 char * nfs4_recoverydir(void);
168 bool nfsd4_spo_must_allow(struct svc_rqst *rqstp);
169 int nfsd4_create_laundry_wq(void);
170 void nfsd4_destroy_laundry_wq(void);
171 bool nfsd_wait_for_delegreturn(struct svc_rqst *rqstp, struct inode *inode);
172 #else
nfsd4_init_slabs(void)173 static inline int nfsd4_init_slabs(void) { return 0; }
nfsd4_free_slabs(void)174 static inline void nfsd4_free_slabs(void) { }
nfs4_state_start(void)175 static inline int nfs4_state_start(void) { return 0; }
nfs4_state_start_net(struct net * net)176 static inline int nfs4_state_start_net(struct net *net) { return 0; }
nfs4_state_shutdown(void)177 static inline void nfs4_state_shutdown(void) { }
nfs4_state_shutdown_net(struct net * net)178 static inline void nfs4_state_shutdown_net(struct net *net) { }
nfs4_reset_recoverydir(char * recdir)179 static inline int nfs4_reset_recoverydir(char *recdir) { return 0; }
nfs4_recoverydir(void)180 static inline char * nfs4_recoverydir(void) {return NULL; }
nfsd4_spo_must_allow(struct svc_rqst * rqstp)181 static inline bool nfsd4_spo_must_allow(struct svc_rqst *rqstp)
182 {
183 return false;
184 }
nfsd4_create_laundry_wq(void)185 static inline int nfsd4_create_laundry_wq(void) { return 0; };
nfsd4_destroy_laundry_wq(void)186 static inline void nfsd4_destroy_laundry_wq(void) {};
nfsd_wait_for_delegreturn(struct svc_rqst * rqstp,struct inode * inode)187 static inline bool nfsd_wait_for_delegreturn(struct svc_rqst *rqstp,
188 struct inode *inode)
189 {
190 return false;
191 }
192 #endif
193
194 /*
195 * lockd binding
196 */
197 void nfsd_lockd_init(void);
198 void nfsd_lockd_shutdown(void);
199
200
201 /*
202 * These macros provide pre-xdr'ed values for faster operation.
203 */
204 #define nfs_ok cpu_to_be32(NFS_OK)
205 #define nfserr_perm cpu_to_be32(NFSERR_PERM)
206 #define nfserr_noent cpu_to_be32(NFSERR_NOENT)
207 #define nfserr_io cpu_to_be32(NFSERR_IO)
208 #define nfserr_nxio cpu_to_be32(NFSERR_NXIO)
209 #define nfserr_eagain cpu_to_be32(NFSERR_EAGAIN)
210 #define nfserr_acces cpu_to_be32(NFSERR_ACCES)
211 #define nfserr_exist cpu_to_be32(NFSERR_EXIST)
212 #define nfserr_xdev cpu_to_be32(NFSERR_XDEV)
213 #define nfserr_nodev cpu_to_be32(NFSERR_NODEV)
214 #define nfserr_notdir cpu_to_be32(NFSERR_NOTDIR)
215 #define nfserr_isdir cpu_to_be32(NFSERR_ISDIR)
216 #define nfserr_inval cpu_to_be32(NFSERR_INVAL)
217 #define nfserr_fbig cpu_to_be32(NFSERR_FBIG)
218 #define nfserr_nospc cpu_to_be32(NFSERR_NOSPC)
219 #define nfserr_rofs cpu_to_be32(NFSERR_ROFS)
220 #define nfserr_mlink cpu_to_be32(NFSERR_MLINK)
221 #define nfserr_opnotsupp cpu_to_be32(NFSERR_OPNOTSUPP)
222 #define nfserr_nametoolong cpu_to_be32(NFSERR_NAMETOOLONG)
223 #define nfserr_notempty cpu_to_be32(NFSERR_NOTEMPTY)
224 #define nfserr_dquot cpu_to_be32(NFSERR_DQUOT)
225 #define nfserr_stale cpu_to_be32(NFSERR_STALE)
226 #define nfserr_remote cpu_to_be32(NFSERR_REMOTE)
227 #define nfserr_wflush cpu_to_be32(NFSERR_WFLUSH)
228 #define nfserr_badhandle cpu_to_be32(NFSERR_BADHANDLE)
229 #define nfserr_notsync cpu_to_be32(NFSERR_NOT_SYNC)
230 #define nfserr_badcookie cpu_to_be32(NFSERR_BAD_COOKIE)
231 #define nfserr_notsupp cpu_to_be32(NFSERR_NOTSUPP)
232 #define nfserr_toosmall cpu_to_be32(NFSERR_TOOSMALL)
233 #define nfserr_serverfault cpu_to_be32(NFSERR_SERVERFAULT)
234 #define nfserr_badtype cpu_to_be32(NFSERR_BADTYPE)
235 #define nfserr_jukebox cpu_to_be32(NFSERR_JUKEBOX)
236 #define nfserr_denied cpu_to_be32(NFSERR_DENIED)
237 #define nfserr_deadlock cpu_to_be32(NFSERR_DEADLOCK)
238 #define nfserr_expired cpu_to_be32(NFSERR_EXPIRED)
239 #define nfserr_bad_cookie cpu_to_be32(NFSERR_BAD_COOKIE)
240 #define nfserr_same cpu_to_be32(NFSERR_SAME)
241 #define nfserr_clid_inuse cpu_to_be32(NFSERR_CLID_INUSE)
242 #define nfserr_stale_clientid cpu_to_be32(NFSERR_STALE_CLIENTID)
243 #define nfserr_resource cpu_to_be32(NFSERR_RESOURCE)
244 #define nfserr_moved cpu_to_be32(NFSERR_MOVED)
245 #define nfserr_nofilehandle cpu_to_be32(NFSERR_NOFILEHANDLE)
246 #define nfserr_minor_vers_mismatch cpu_to_be32(NFSERR_MINOR_VERS_MISMATCH)
247 #define nfserr_share_denied cpu_to_be32(NFSERR_SHARE_DENIED)
248 #define nfserr_stale_stateid cpu_to_be32(NFSERR_STALE_STATEID)
249 #define nfserr_old_stateid cpu_to_be32(NFSERR_OLD_STATEID)
250 #define nfserr_bad_stateid cpu_to_be32(NFSERR_BAD_STATEID)
251 #define nfserr_bad_seqid cpu_to_be32(NFSERR_BAD_SEQID)
252 #define nfserr_symlink cpu_to_be32(NFSERR_SYMLINK)
253 #define nfserr_not_same cpu_to_be32(NFSERR_NOT_SAME)
254 #define nfserr_lock_range cpu_to_be32(NFSERR_LOCK_RANGE)
255 #define nfserr_restorefh cpu_to_be32(NFSERR_RESTOREFH)
256 #define nfserr_attrnotsupp cpu_to_be32(NFSERR_ATTRNOTSUPP)
257 #define nfserr_bad_xdr cpu_to_be32(NFSERR_BAD_XDR)
258 #define nfserr_openmode cpu_to_be32(NFSERR_OPENMODE)
259 #define nfserr_badowner cpu_to_be32(NFSERR_BADOWNER)
260 #define nfserr_locks_held cpu_to_be32(NFSERR_LOCKS_HELD)
261 #define nfserr_op_illegal cpu_to_be32(NFSERR_OP_ILLEGAL)
262 #define nfserr_grace cpu_to_be32(NFSERR_GRACE)
263 #define nfserr_no_grace cpu_to_be32(NFSERR_NO_GRACE)
264 #define nfserr_reclaim_bad cpu_to_be32(NFSERR_RECLAIM_BAD)
265 #define nfserr_badname cpu_to_be32(NFSERR_BADNAME)
266 #define nfserr_cb_path_down cpu_to_be32(NFSERR_CB_PATH_DOWN)
267 #define nfserr_locked cpu_to_be32(NFSERR_LOCKED)
268 #define nfserr_wrongsec cpu_to_be32(NFSERR_WRONGSEC)
269 #define nfserr_badiomode cpu_to_be32(NFS4ERR_BADIOMODE)
270 #define nfserr_badlayout cpu_to_be32(NFS4ERR_BADLAYOUT)
271 #define nfserr_bad_session_digest cpu_to_be32(NFS4ERR_BAD_SESSION_DIGEST)
272 #define nfserr_badsession cpu_to_be32(NFS4ERR_BADSESSION)
273 #define nfserr_badslot cpu_to_be32(NFS4ERR_BADSLOT)
274 #define nfserr_complete_already cpu_to_be32(NFS4ERR_COMPLETE_ALREADY)
275 #define nfserr_conn_not_bound_to_session cpu_to_be32(NFS4ERR_CONN_NOT_BOUND_TO_SESSION)
276 #define nfserr_deleg_already_wanted cpu_to_be32(NFS4ERR_DELEG_ALREADY_WANTED)
277 #define nfserr_back_chan_busy cpu_to_be32(NFS4ERR_BACK_CHAN_BUSY)
278 #define nfserr_layouttrylater cpu_to_be32(NFS4ERR_LAYOUTTRYLATER)
279 #define nfserr_layoutunavailable cpu_to_be32(NFS4ERR_LAYOUTUNAVAILABLE)
280 #define nfserr_nomatching_layout cpu_to_be32(NFS4ERR_NOMATCHING_LAYOUT)
281 #define nfserr_recallconflict cpu_to_be32(NFS4ERR_RECALLCONFLICT)
282 #define nfserr_unknown_layouttype cpu_to_be32(NFS4ERR_UNKNOWN_LAYOUTTYPE)
283 #define nfserr_seq_misordered cpu_to_be32(NFS4ERR_SEQ_MISORDERED)
284 #define nfserr_sequence_pos cpu_to_be32(NFS4ERR_SEQUENCE_POS)
285 #define nfserr_req_too_big cpu_to_be32(NFS4ERR_REQ_TOO_BIG)
286 #define nfserr_rep_too_big cpu_to_be32(NFS4ERR_REP_TOO_BIG)
287 #define nfserr_rep_too_big_to_cache cpu_to_be32(NFS4ERR_REP_TOO_BIG_TO_CACHE)
288 #define nfserr_retry_uncached_rep cpu_to_be32(NFS4ERR_RETRY_UNCACHED_REP)
289 #define nfserr_unsafe_compound cpu_to_be32(NFS4ERR_UNSAFE_COMPOUND)
290 #define nfserr_too_many_ops cpu_to_be32(NFS4ERR_TOO_MANY_OPS)
291 #define nfserr_op_not_in_session cpu_to_be32(NFS4ERR_OP_NOT_IN_SESSION)
292 #define nfserr_hash_alg_unsupp cpu_to_be32(NFS4ERR_HASH_ALG_UNSUPP)
293 #define nfserr_clientid_busy cpu_to_be32(NFS4ERR_CLIENTID_BUSY)
294 #define nfserr_pnfs_io_hole cpu_to_be32(NFS4ERR_PNFS_IO_HOLE)
295 #define nfserr_seq_false_retry cpu_to_be32(NFS4ERR_SEQ_FALSE_RETRY)
296 #define nfserr_bad_high_slot cpu_to_be32(NFS4ERR_BAD_HIGH_SLOT)
297 #define nfserr_deadsession cpu_to_be32(NFS4ERR_DEADSESSION)
298 #define nfserr_encr_alg_unsupp cpu_to_be32(NFS4ERR_ENCR_ALG_UNSUPP)
299 #define nfserr_pnfs_no_layout cpu_to_be32(NFS4ERR_PNFS_NO_LAYOUT)
300 #define nfserr_not_only_op cpu_to_be32(NFS4ERR_NOT_ONLY_OP)
301 #define nfserr_wrong_cred cpu_to_be32(NFS4ERR_WRONG_CRED)
302 #define nfserr_wrong_type cpu_to_be32(NFS4ERR_WRONG_TYPE)
303 #define nfserr_dirdeleg_unavail cpu_to_be32(NFS4ERR_DIRDELEG_UNAVAIL)
304 #define nfserr_reject_deleg cpu_to_be32(NFS4ERR_REJECT_DELEG)
305 #define nfserr_returnconflict cpu_to_be32(NFS4ERR_RETURNCONFLICT)
306 #define nfserr_deleg_revoked cpu_to_be32(NFS4ERR_DELEG_REVOKED)
307 #define nfserr_partner_notsupp cpu_to_be32(NFS4ERR_PARTNER_NOTSUPP)
308 #define nfserr_partner_no_auth cpu_to_be32(NFS4ERR_PARTNER_NO_AUTH)
309 #define nfserr_union_notsupp cpu_to_be32(NFS4ERR_UNION_NOTSUPP)
310 #define nfserr_offload_denied cpu_to_be32(NFS4ERR_OFFLOAD_DENIED)
311 #define nfserr_wrong_lfs cpu_to_be32(NFS4ERR_WRONG_LFS)
312 #define nfserr_badlabel cpu_to_be32(NFS4ERR_BADLABEL)
313 #define nfserr_file_open cpu_to_be32(NFS4ERR_FILE_OPEN)
314 #define nfserr_xattr2big cpu_to_be32(NFS4ERR_XATTR2BIG)
315 #define nfserr_noxattr cpu_to_be32(NFS4ERR_NOXATTR)
316
317 /* error codes for internal use */
318 /* if a request fails due to kmalloc failure, it gets dropped.
319 * Client should resend eventually
320 */
321 #define nfserr_dropit cpu_to_be32(30000)
322 /* end-of-file indicator in readdir */
323 #define nfserr_eof cpu_to_be32(30001)
324 /* replay detected */
325 #define nfserr_replay_me cpu_to_be32(11001)
326 /* nfs41 replay detected */
327 #define nfserr_replay_cache cpu_to_be32(11002)
328
329 /* Check for dir entries '.' and '..' */
330 #define isdotent(n, l) (l < 3 && n[0] == '.' && (l == 1 || n[1] == '.'))
331
332 #ifdef CONFIG_NFSD_V4
333
334 /* before processing a COMPOUND operation, we have to check that there
335 * is enough space in the buffer for XDR encode to succeed. otherwise,
336 * we might process an operation with side effects, and be unable to
337 * tell the client that the operation succeeded.
338 *
339 * COMPOUND_SLACK_SPACE - this is the minimum bytes of buffer space
340 * needed to encode an "ordinary" _successful_ operation. (GETATTR,
341 * READ, READDIR, and READLINK have their own buffer checks.) if we
342 * fall below this level, we fail the next operation with NFS4ERR_RESOURCE.
343 *
344 * COMPOUND_ERR_SLACK_SPACE - this is the minimum bytes of buffer space
345 * needed to encode an operation which has failed with NFS4ERR_RESOURCE.
346 * care is taken to ensure that we never fall below this level for any
347 * reason.
348 */
349 #define COMPOUND_SLACK_SPACE 140 /* OP_GETFH */
350 #define COMPOUND_ERR_SLACK_SPACE 16 /* OP_SETATTR */
351
352 #define NFSD_LAUNDROMAT_MINTIMEOUT 1 /* seconds */
353 #define NFSD_COURTESY_CLIENT_TIMEOUT (24 * 60 * 60) /* seconds */
354 #define NFSD_CLIENT_MAX_TRIM_PER_RUN 128
355 #define NFS4_CLIENTS_PER_GB 1024
356 #define NFSD_DELEGRETURN_TIMEOUT (HZ / 34) /* 30ms */
357
358 /*
359 * The following attributes are currently not supported by the NFSv4 server:
360 * ARCHIVE (deprecated anyway)
361 * HIDDEN (unlikely to be supported any time soon)
362 * MIMETYPE (unlikely to be supported any time soon)
363 * QUOTA_* (will be supported in a forthcoming patch)
364 * SYSTEM (unlikely to be supported any time soon)
365 * TIME_BACKUP (unlikely to be supported any time soon)
366 * TIME_CREATE (unlikely to be supported any time soon)
367 */
368 #define NFSD4_SUPPORTED_ATTRS_WORD0 \
369 (FATTR4_WORD0_SUPPORTED_ATTRS | FATTR4_WORD0_TYPE | FATTR4_WORD0_FH_EXPIRE_TYPE \
370 | FATTR4_WORD0_CHANGE | FATTR4_WORD0_SIZE | FATTR4_WORD0_LINK_SUPPORT \
371 | FATTR4_WORD0_SYMLINK_SUPPORT | FATTR4_WORD0_NAMED_ATTR | FATTR4_WORD0_FSID \
372 | FATTR4_WORD0_UNIQUE_HANDLES | FATTR4_WORD0_LEASE_TIME | FATTR4_WORD0_RDATTR_ERROR \
373 | FATTR4_WORD0_ACLSUPPORT | FATTR4_WORD0_CANSETTIME | FATTR4_WORD0_CASE_INSENSITIVE \
374 | FATTR4_WORD0_CASE_PRESERVING | FATTR4_WORD0_CHOWN_RESTRICTED \
375 | FATTR4_WORD0_FILEHANDLE | FATTR4_WORD0_FILEID | FATTR4_WORD0_FILES_AVAIL \
376 | FATTR4_WORD0_FILES_FREE | FATTR4_WORD0_FILES_TOTAL | FATTR4_WORD0_FS_LOCATIONS | FATTR4_WORD0_HOMOGENEOUS \
377 | FATTR4_WORD0_MAXFILESIZE | FATTR4_WORD0_MAXLINK | FATTR4_WORD0_MAXNAME \
378 | FATTR4_WORD0_MAXREAD | FATTR4_WORD0_MAXWRITE | FATTR4_WORD0_ACL)
379
380 #define NFSD4_SUPPORTED_ATTRS_WORD1 \
381 (FATTR4_WORD1_MODE | FATTR4_WORD1_NO_TRUNC | FATTR4_WORD1_NUMLINKS \
382 | FATTR4_WORD1_OWNER | FATTR4_WORD1_OWNER_GROUP | FATTR4_WORD1_RAWDEV \
383 | FATTR4_WORD1_SPACE_AVAIL | FATTR4_WORD1_SPACE_FREE | FATTR4_WORD1_SPACE_TOTAL \
384 | FATTR4_WORD1_SPACE_USED | FATTR4_WORD1_TIME_ACCESS | FATTR4_WORD1_TIME_ACCESS_SET \
385 | FATTR4_WORD1_TIME_DELTA | FATTR4_WORD1_TIME_METADATA | FATTR4_WORD1_TIME_CREATE \
386 | FATTR4_WORD1_TIME_MODIFY | FATTR4_WORD1_TIME_MODIFY_SET | FATTR4_WORD1_MOUNTED_ON_FILEID)
387
388 #define NFSD4_SUPPORTED_ATTRS_WORD2 0
389
390 /* 4.1 */
391 #ifdef CONFIG_NFSD_PNFS
392 #define PNFSD_SUPPORTED_ATTRS_WORD1 FATTR4_WORD1_FS_LAYOUT_TYPES
393 #define PNFSD_SUPPORTED_ATTRS_WORD2 \
394 (FATTR4_WORD2_LAYOUT_BLKSIZE | FATTR4_WORD2_LAYOUT_TYPES)
395 #else
396 #define PNFSD_SUPPORTED_ATTRS_WORD1 0
397 #define PNFSD_SUPPORTED_ATTRS_WORD2 0
398 #endif /* CONFIG_NFSD_PNFS */
399
400 #define NFSD4_1_SUPPORTED_ATTRS_WORD0 \
401 NFSD4_SUPPORTED_ATTRS_WORD0
402
403 #define NFSD4_1_SUPPORTED_ATTRS_WORD1 \
404 (NFSD4_SUPPORTED_ATTRS_WORD1 | PNFSD_SUPPORTED_ATTRS_WORD1)
405
406 #define NFSD4_1_SUPPORTED_ATTRS_WORD2 \
407 (NFSD4_SUPPORTED_ATTRS_WORD2 | PNFSD_SUPPORTED_ATTRS_WORD2 | \
408 FATTR4_WORD2_SUPPATTR_EXCLCREAT)
409
410 /* 4.2 */
411 #ifdef CONFIG_NFSD_V4_SECURITY_LABEL
412 #define NFSD4_2_SECURITY_ATTRS FATTR4_WORD2_SECURITY_LABEL
413 #else
414 #define NFSD4_2_SECURITY_ATTRS 0
415 #endif
416
417 #define NFSD4_2_SUPPORTED_ATTRS_WORD2 \
418 (NFSD4_1_SUPPORTED_ATTRS_WORD2 | \
419 FATTR4_WORD2_MODE_UMASK | \
420 NFSD4_2_SECURITY_ATTRS | \
421 FATTR4_WORD2_XATTR_SUPPORT)
422
423 extern const u32 nfsd_suppattrs[3][3];
424
nfsd4_set_netaddr(struct sockaddr * addr,struct nfs42_netaddr * netaddr)425 static inline __be32 nfsd4_set_netaddr(struct sockaddr *addr,
426 struct nfs42_netaddr *netaddr)
427 {
428 struct sockaddr_in *sin = (struct sockaddr_in *)addr;
429 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)addr;
430 unsigned int port;
431 size_t ret_addr, ret_port;
432
433 switch (addr->sa_family) {
434 case AF_INET:
435 port = ntohs(sin->sin_port);
436 sprintf(netaddr->netid, "tcp");
437 netaddr->netid_len = 3;
438 break;
439 case AF_INET6:
440 port = ntohs(sin6->sin6_port);
441 sprintf(netaddr->netid, "tcp6");
442 netaddr->netid_len = 4;
443 break;
444 default:
445 return nfserr_inval;
446 }
447 ret_addr = rpc_ntop(addr, netaddr->addr, sizeof(netaddr->addr));
448 ret_port = snprintf(netaddr->addr + ret_addr,
449 RPCBIND_MAXUADDRLEN + 1 - ret_addr,
450 ".%u.%u", port >> 8, port & 0xff);
451 WARN_ON(ret_port >= RPCBIND_MAXUADDRLEN + 1 - ret_addr);
452 netaddr->addr_len = ret_addr + ret_port;
453 return 0;
454 }
455
bmval_is_subset(const u32 * bm1,const u32 * bm2)456 static inline bool bmval_is_subset(const u32 *bm1, const u32 *bm2)
457 {
458 return !((bm1[0] & ~bm2[0]) ||
459 (bm1[1] & ~bm2[1]) ||
460 (bm1[2] & ~bm2[2]));
461 }
462
nfsd_attrs_supported(u32 minorversion,const u32 * bmval)463 static inline bool nfsd_attrs_supported(u32 minorversion, const u32 *bmval)
464 {
465 return bmval_is_subset(bmval, nfsd_suppattrs[minorversion]);
466 }
467
468 /* These will return ERR_INVAL if specified in GETATTR or READDIR. */
469 #define NFSD_WRITEONLY_ATTRS_WORD1 \
470 (FATTR4_WORD1_TIME_ACCESS_SET | FATTR4_WORD1_TIME_MODIFY_SET)
471
472 /*
473 * These are the only attrs allowed in CREATE/OPEN/SETATTR. Don't add
474 * a writeable attribute here without also adding code to parse it to
475 * nfsd4_decode_fattr().
476 */
477 #define NFSD_WRITEABLE_ATTRS_WORD0 \
478 (FATTR4_WORD0_SIZE | FATTR4_WORD0_ACL)
479 #define NFSD_WRITEABLE_ATTRS_WORD1 \
480 (FATTR4_WORD1_MODE | FATTR4_WORD1_OWNER | FATTR4_WORD1_OWNER_GROUP \
481 | FATTR4_WORD1_TIME_ACCESS_SET | FATTR4_WORD1_TIME_CREATE \
482 | FATTR4_WORD1_TIME_MODIFY_SET)
483 #ifdef CONFIG_NFSD_V4_SECURITY_LABEL
484 #define MAYBE_FATTR4_WORD2_SECURITY_LABEL \
485 FATTR4_WORD2_SECURITY_LABEL
486 #else
487 #define MAYBE_FATTR4_WORD2_SECURITY_LABEL 0
488 #endif
489 #define NFSD_WRITEABLE_ATTRS_WORD2 \
490 (FATTR4_WORD2_MODE_UMASK \
491 | MAYBE_FATTR4_WORD2_SECURITY_LABEL)
492
493 #define NFSD_SUPPATTR_EXCLCREAT_WORD0 \
494 NFSD_WRITEABLE_ATTRS_WORD0
495 /*
496 * we currently store the exclusive create verifier in the v_{a,m}time
497 * attributes so the client can't set these at create time using EXCLUSIVE4_1
498 */
499 #define NFSD_SUPPATTR_EXCLCREAT_WORD1 \
500 (NFSD_WRITEABLE_ATTRS_WORD1 & \
501 ~(FATTR4_WORD1_TIME_ACCESS_SET | FATTR4_WORD1_TIME_MODIFY_SET))
502 #define NFSD_SUPPATTR_EXCLCREAT_WORD2 \
503 NFSD_WRITEABLE_ATTRS_WORD2
504
505 extern int nfsd4_is_junction(struct dentry *dentry);
506 extern int register_cld_notifier(void);
507 extern void unregister_cld_notifier(void);
508 #ifdef CONFIG_NFSD_V4_2_INTER_SSC
509 extern void nfsd4_ssc_init_umount_work(struct nfsd_net *nn);
510 #endif
511
512 extern void nfsd4_init_leases_net(struct nfsd_net *nn);
513
514 #else /* CONFIG_NFSD_V4 */
nfsd4_is_junction(struct dentry * dentry)515 static inline int nfsd4_is_junction(struct dentry *dentry)
516 {
517 return 0;
518 }
519
nfsd4_init_leases_net(struct nfsd_net * nn)520 static inline void nfsd4_init_leases_net(struct nfsd_net *nn) { };
521
522 #define register_cld_notifier() 0
523 #define unregister_cld_notifier() do { } while(0)
524
525 #endif /* CONFIG_NFSD_V4 */
526
527 #endif /* LINUX_NFSD_NFSD_H */
528
