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 /* Maximum number of operations per session compound */
66 #define NFSD_MAX_OPS_PER_COMPOUND 50
67
68 struct nfsd_genl_rqstp {
69 struct sockaddr rq_daddr;
70 struct sockaddr rq_saddr;
71 unsigned long rq_flags;
72 ktime_t rq_stime;
73 __be32 rq_xid;
74 u32 rq_vers;
75 u32 rq_prog;
76 u32 rq_proc;
77
78 /* NFSv4 compound */
79 u32 rq_opcnt;
80 u32 rq_opnum[NFSD_MAX_OPS_PER_COMPOUND];
81 };
82
83 extern struct svc_program nfsd_program;
84 extern const struct svc_version nfsd_version2, nfsd_version3, nfsd_version4;
85 extern struct mutex nfsd_mutex;
86 extern spinlock_t nfsd_drc_lock;
87 extern unsigned long nfsd_drc_max_mem;
88 extern unsigned long nfsd_drc_mem_used;
89 extern atomic_t nfsd_th_cnt; /* number of available threads */
90
91 extern const struct seq_operations nfs_exports_op;
92
93 /*
94 * Common void argument and result helpers
95 */
96 struct nfsd_voidargs { };
97 struct nfsd_voidres { };
98 bool nfssvc_decode_voidarg(struct svc_rqst *rqstp,
99 struct xdr_stream *xdr);
100 bool nfssvc_encode_voidres(struct svc_rqst *rqstp,
101 struct xdr_stream *xdr);
102
103 /*
104 * Function prototypes.
105 */
106 int nfsd_svc(int n, int *nservers, struct net *net,
107 const struct cred *cred, const char *scope);
108 int nfsd_dispatch(struct svc_rqst *rqstp);
109
110 int nfsd_nrthreads(struct net *);
111 int nfsd_nrpools(struct net *);
112 int nfsd_get_nrthreads(int n, int *, struct net *);
113 int nfsd_set_nrthreads(int n, int *, struct net *);
114 int nfsd_pool_stats_open(struct inode *, struct file *);
115 int nfsd_pool_stats_release(struct inode *, struct file *);
116 void nfsd_shutdown_threads(struct net *net);
117
118 bool i_am_nfsd(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 struct nfsd_net;
147
148 enum vers_op {NFSD_SET, NFSD_CLEAR, NFSD_TEST, NFSD_AVAIL };
149 int nfsd_vers(struct nfsd_net *nn, int vers, enum vers_op change);
150 int nfsd_minorversion(struct nfsd_net *nn, u32 minorversion, enum vers_op change);
151 void nfsd_reset_versions(struct nfsd_net *nn);
152 int nfsd_create_serv(struct net *net);
153 void nfsd_destroy_serv(struct net *net);
154
155 extern int nfsd_max_blksize;
156
157 static inline int nfsd_v4client(struct svc_rqst *rq)
158 {
159 return rq->rq_prog == NFS_PROGRAM && rq->rq_vers == 4;
160 }
161 static inline struct user_namespace *
162 nfsd_user_namespace(const struct svc_rqst *rqstp)
163 {
164 const struct cred *cred = rqstp->rq_xprt->xpt_cred;
165 return cred ? cred->user_ns : &init_user_ns;
166 }
167
168 /*
169 * NFSv4 State
170 */
171 #ifdef CONFIG_NFSD_V4
172 extern unsigned long max_delegations;
173 int nfsd4_init_slabs(void);
174 void nfsd4_free_slabs(void);
175 int nfs4_state_start(void);
176 int nfs4_state_start_net(struct net *net);
177 void nfs4_state_shutdown(void);
178 void nfs4_state_shutdown_net(struct net *net);
179 int nfs4_reset_recoverydir(char *recdir);
180 char * nfs4_recoverydir(void);
181 bool nfsd4_spo_must_allow(struct svc_rqst *rqstp);
182 int nfsd4_create_laundry_wq(void);
183 void nfsd4_destroy_laundry_wq(void);
184 bool nfsd_wait_for_delegreturn(struct svc_rqst *rqstp, struct inode *inode);
185 #else
186 static inline int nfsd4_init_slabs(void) { return 0; }
187 static inline void nfsd4_free_slabs(void) { }
188 static inline int nfs4_state_start(void) { return 0; }
189 static inline int nfs4_state_start_net(struct net *net) { return 0; }
190 static inline void nfs4_state_shutdown(void) { }
191 static inline void nfs4_state_shutdown_net(struct net *net) { }
192 static inline int nfs4_reset_recoverydir(char *recdir) { return 0; }
193 static inline char * nfs4_recoverydir(void) {return NULL; }
194 static inline bool nfsd4_spo_must_allow(struct svc_rqst *rqstp)
195 {
196 return false;
197 }
198 static inline int nfsd4_create_laundry_wq(void) { return 0; };
199 static inline void nfsd4_destroy_laundry_wq(void) {};
200 static inline bool nfsd_wait_for_delegreturn(struct svc_rqst *rqstp,
201 struct inode *inode)
202 {
203 return false;
204 }
205 #endif
206
207 /*
208 * lockd binding
209 */
210 void nfsd_lockd_init(void);
211 void nfsd_lockd_shutdown(void);
212
213
214 /*
215 * These macros provide pre-xdr'ed values for faster operation.
216 */
217 #define nfs_ok cpu_to_be32(NFS_OK)
218 #define nfserr_perm cpu_to_be32(NFSERR_PERM)
219 #define nfserr_noent cpu_to_be32(NFSERR_NOENT)
220 #define nfserr_io cpu_to_be32(NFSERR_IO)
221 #define nfserr_nxio cpu_to_be32(NFSERR_NXIO)
222 #define nfserr_eagain cpu_to_be32(NFSERR_EAGAIN)
223 #define nfserr_acces cpu_to_be32(NFSERR_ACCES)
224 #define nfserr_exist cpu_to_be32(NFSERR_EXIST)
225 #define nfserr_xdev cpu_to_be32(NFSERR_XDEV)
226 #define nfserr_nodev cpu_to_be32(NFSERR_NODEV)
227 #define nfserr_notdir cpu_to_be32(NFSERR_NOTDIR)
228 #define nfserr_isdir cpu_to_be32(NFSERR_ISDIR)
229 #define nfserr_inval cpu_to_be32(NFSERR_INVAL)
230 #define nfserr_fbig cpu_to_be32(NFSERR_FBIG)
231 #define nfserr_nospc cpu_to_be32(NFSERR_NOSPC)
232 #define nfserr_rofs cpu_to_be32(NFSERR_ROFS)
233 #define nfserr_mlink cpu_to_be32(NFSERR_MLINK)
234 #define nfserr_nametoolong cpu_to_be32(NFSERR_NAMETOOLONG)
235 #define nfserr_notempty cpu_to_be32(NFSERR_NOTEMPTY)
236 #define nfserr_dquot cpu_to_be32(NFSERR_DQUOT)
237 #define nfserr_stale cpu_to_be32(NFSERR_STALE)
238 #define nfserr_remote cpu_to_be32(NFSERR_REMOTE)
239 #define nfserr_wflush cpu_to_be32(NFSERR_WFLUSH)
240 #define nfserr_badhandle cpu_to_be32(NFSERR_BADHANDLE)
241 #define nfserr_notsync cpu_to_be32(NFSERR_NOT_SYNC)
242 #define nfserr_badcookie cpu_to_be32(NFSERR_BAD_COOKIE)
243 #define nfserr_notsupp cpu_to_be32(NFSERR_NOTSUPP)
244 #define nfserr_toosmall cpu_to_be32(NFSERR_TOOSMALL)
245 #define nfserr_serverfault cpu_to_be32(NFSERR_SERVERFAULT)
246 #define nfserr_badtype cpu_to_be32(NFSERR_BADTYPE)
247 #define nfserr_jukebox cpu_to_be32(NFSERR_JUKEBOX)
248 #define nfserr_denied cpu_to_be32(NFSERR_DENIED)
249 #define nfserr_deadlock cpu_to_be32(NFSERR_DEADLOCK)
250 #define nfserr_expired cpu_to_be32(NFSERR_EXPIRED)
251 #define nfserr_bad_cookie cpu_to_be32(NFSERR_BAD_COOKIE)
252 #define nfserr_same cpu_to_be32(NFSERR_SAME)
253 #define nfserr_clid_inuse cpu_to_be32(NFSERR_CLID_INUSE)
254 #define nfserr_stale_clientid cpu_to_be32(NFSERR_STALE_CLIENTID)
255 #define nfserr_resource cpu_to_be32(NFSERR_RESOURCE)
256 #define nfserr_moved cpu_to_be32(NFSERR_MOVED)
257 #define nfserr_nofilehandle cpu_to_be32(NFSERR_NOFILEHANDLE)
258 #define nfserr_minor_vers_mismatch cpu_to_be32(NFSERR_MINOR_VERS_MISMATCH)
259 #define nfserr_share_denied cpu_to_be32(NFSERR_SHARE_DENIED)
260 #define nfserr_stale_stateid cpu_to_be32(NFSERR_STALE_STATEID)
261 #define nfserr_old_stateid cpu_to_be32(NFSERR_OLD_STATEID)
262 #define nfserr_bad_stateid cpu_to_be32(NFSERR_BAD_STATEID)
263 #define nfserr_bad_seqid cpu_to_be32(NFSERR_BAD_SEQID)
264 #define nfserr_symlink cpu_to_be32(NFSERR_SYMLINK)
265 #define nfserr_not_same cpu_to_be32(NFSERR_NOT_SAME)
266 #define nfserr_lock_range cpu_to_be32(NFSERR_LOCK_RANGE)
267 #define nfserr_restorefh cpu_to_be32(NFSERR_RESTOREFH)
268 #define nfserr_attrnotsupp cpu_to_be32(NFSERR_ATTRNOTSUPP)
269 #define nfserr_bad_xdr cpu_to_be32(NFSERR_BAD_XDR)
270 #define nfserr_openmode cpu_to_be32(NFSERR_OPENMODE)
271 #define nfserr_badowner cpu_to_be32(NFSERR_BADOWNER)
272 #define nfserr_locks_held cpu_to_be32(NFSERR_LOCKS_HELD)
273 #define nfserr_op_illegal cpu_to_be32(NFSERR_OP_ILLEGAL)
274 #define nfserr_grace cpu_to_be32(NFSERR_GRACE)
275 #define nfserr_no_grace cpu_to_be32(NFSERR_NO_GRACE)
276 #define nfserr_reclaim_bad cpu_to_be32(NFSERR_RECLAIM_BAD)
277 #define nfserr_badname cpu_to_be32(NFSERR_BADNAME)
278 #define nfserr_admin_revoked cpu_to_be32(NFS4ERR_ADMIN_REVOKED)
279 #define nfserr_cb_path_down cpu_to_be32(NFSERR_CB_PATH_DOWN)
280 #define nfserr_locked cpu_to_be32(NFSERR_LOCKED)
281 #define nfserr_wrongsec cpu_to_be32(NFSERR_WRONGSEC)
282 #define nfserr_badiomode cpu_to_be32(NFS4ERR_BADIOMODE)
283 #define nfserr_badlayout cpu_to_be32(NFS4ERR_BADLAYOUT)
284 #define nfserr_bad_session_digest cpu_to_be32(NFS4ERR_BAD_SESSION_DIGEST)
285 #define nfserr_badsession cpu_to_be32(NFS4ERR_BADSESSION)
286 #define nfserr_badslot cpu_to_be32(NFS4ERR_BADSLOT)
287 #define nfserr_complete_already cpu_to_be32(NFS4ERR_COMPLETE_ALREADY)
288 #define nfserr_conn_not_bound_to_session cpu_to_be32(NFS4ERR_CONN_NOT_BOUND_TO_SESSION)
289 #define nfserr_deleg_already_wanted cpu_to_be32(NFS4ERR_DELEG_ALREADY_WANTED)
290 #define nfserr_back_chan_busy cpu_to_be32(NFS4ERR_BACK_CHAN_BUSY)
291 #define nfserr_layouttrylater cpu_to_be32(NFS4ERR_LAYOUTTRYLATER)
292 #define nfserr_layoutunavailable cpu_to_be32(NFS4ERR_LAYOUTUNAVAILABLE)
293 #define nfserr_nomatching_layout cpu_to_be32(NFS4ERR_NOMATCHING_LAYOUT)
294 #define nfserr_recallconflict cpu_to_be32(NFS4ERR_RECALLCONFLICT)
295 #define nfserr_unknown_layouttype cpu_to_be32(NFS4ERR_UNKNOWN_LAYOUTTYPE)
296 #define nfserr_seq_misordered cpu_to_be32(NFS4ERR_SEQ_MISORDERED)
297 #define nfserr_sequence_pos cpu_to_be32(NFS4ERR_SEQUENCE_POS)
298 #define nfserr_req_too_big cpu_to_be32(NFS4ERR_REQ_TOO_BIG)
299 #define nfserr_rep_too_big cpu_to_be32(NFS4ERR_REP_TOO_BIG)
300 #define nfserr_rep_too_big_to_cache cpu_to_be32(NFS4ERR_REP_TOO_BIG_TO_CACHE)
301 #define nfserr_retry_uncached_rep cpu_to_be32(NFS4ERR_RETRY_UNCACHED_REP)
302 #define nfserr_unsafe_compound cpu_to_be32(NFS4ERR_UNSAFE_COMPOUND)
303 #define nfserr_too_many_ops cpu_to_be32(NFS4ERR_TOO_MANY_OPS)
304 #define nfserr_op_not_in_session cpu_to_be32(NFS4ERR_OP_NOT_IN_SESSION)
305 #define nfserr_hash_alg_unsupp cpu_to_be32(NFS4ERR_HASH_ALG_UNSUPP)
306 #define nfserr_clientid_busy cpu_to_be32(NFS4ERR_CLIENTID_BUSY)
307 #define nfserr_pnfs_io_hole cpu_to_be32(NFS4ERR_PNFS_IO_HOLE)
308 #define nfserr_seq_false_retry cpu_to_be32(NFS4ERR_SEQ_FALSE_RETRY)
309 #define nfserr_bad_high_slot cpu_to_be32(NFS4ERR_BAD_HIGH_SLOT)
310 #define nfserr_deadsession cpu_to_be32(NFS4ERR_DEADSESSION)
311 #define nfserr_encr_alg_unsupp cpu_to_be32(NFS4ERR_ENCR_ALG_UNSUPP)
312 #define nfserr_pnfs_no_layout cpu_to_be32(NFS4ERR_PNFS_NO_LAYOUT)
313 #define nfserr_not_only_op cpu_to_be32(NFS4ERR_NOT_ONLY_OP)
314 #define nfserr_wrong_cred cpu_to_be32(NFS4ERR_WRONG_CRED)
315 #define nfserr_wrong_type cpu_to_be32(NFS4ERR_WRONG_TYPE)
316 #define nfserr_dirdeleg_unavail cpu_to_be32(NFS4ERR_DIRDELEG_UNAVAIL)
317 #define nfserr_reject_deleg cpu_to_be32(NFS4ERR_REJECT_DELEG)
318 #define nfserr_returnconflict cpu_to_be32(NFS4ERR_RETURNCONFLICT)
319 #define nfserr_deleg_revoked cpu_to_be32(NFS4ERR_DELEG_REVOKED)
320 #define nfserr_partner_notsupp cpu_to_be32(NFS4ERR_PARTNER_NOTSUPP)
321 #define nfserr_partner_no_auth cpu_to_be32(NFS4ERR_PARTNER_NO_AUTH)
322 #define nfserr_union_notsupp cpu_to_be32(NFS4ERR_UNION_NOTSUPP)
323 #define nfserr_offload_denied cpu_to_be32(NFS4ERR_OFFLOAD_DENIED)
324 #define nfserr_wrong_lfs cpu_to_be32(NFS4ERR_WRONG_LFS)
325 #define nfserr_badlabel cpu_to_be32(NFS4ERR_BADLABEL)
326 #define nfserr_file_open cpu_to_be32(NFS4ERR_FILE_OPEN)
327 #define nfserr_xattr2big cpu_to_be32(NFS4ERR_XATTR2BIG)
328 #define nfserr_noxattr cpu_to_be32(NFS4ERR_NOXATTR)
329
330 /* error codes for internal use */
331 /* if a request fails due to kmalloc failure, it gets dropped.
332 * Client should resend eventually
333 */
334 #define nfserr_dropit cpu_to_be32(30000)
335 /* end-of-file indicator in readdir */
336 #define nfserr_eof cpu_to_be32(30001)
337 /* replay detected */
338 #define nfserr_replay_me cpu_to_be32(11001)
339 /* nfs41 replay detected */
340 #define nfserr_replay_cache cpu_to_be32(11002)
341
342 /* Check for dir entries '.' and '..' */
343 #define isdotent(n, l) (l < 3 && n[0] == '.' && (l == 1 || n[1] == '.'))
344
345 #ifdef CONFIG_NFSD_V4
346
347 /* before processing a COMPOUND operation, we have to check that there
348 * is enough space in the buffer for XDR encode to succeed. otherwise,
349 * we might process an operation with side effects, and be unable to
350 * tell the client that the operation succeeded.
351 *
352 * COMPOUND_SLACK_SPACE - this is the minimum bytes of buffer space
353 * needed to encode an "ordinary" _successful_ operation. (GETATTR,
354 * READ, READDIR, and READLINK have their own buffer checks.) if we
355 * fall below this level, we fail the next operation with NFS4ERR_RESOURCE.
356 *
357 * COMPOUND_ERR_SLACK_SPACE - this is the minimum bytes of buffer space
358 * needed to encode an operation which has failed with NFS4ERR_RESOURCE.
359 * care is taken to ensure that we never fall below this level for any
360 * reason.
361 */
362 #define COMPOUND_SLACK_SPACE 140 /* OP_GETFH */
363 #define COMPOUND_ERR_SLACK_SPACE 16 /* OP_SETATTR */
364
365 #define NFSD_LAUNDROMAT_MINTIMEOUT 1 /* seconds */
366 #define NFSD_COURTESY_CLIENT_TIMEOUT (24 * 60 * 60) /* seconds */
367 #define NFSD_CLIENT_MAX_TRIM_PER_RUN 128
368 #define NFS4_CLIENTS_PER_GB 1024
369 #define NFSD_DELEGRETURN_TIMEOUT (HZ / 34) /* 30ms */
370 #define NFSD_CB_GETATTR_TIMEOUT NFSD_DELEGRETURN_TIMEOUT
371
372 /*
373 * The following attributes are currently not supported by the NFSv4 server:
374 * ARCHIVE (deprecated anyway)
375 * HIDDEN (unlikely to be supported any time soon)
376 * MIMETYPE (unlikely to be supported any time soon)
377 * QUOTA_* (will be supported in a forthcoming patch)
378 * SYSTEM (unlikely to be supported any time soon)
379 * TIME_BACKUP (unlikely to be supported any time soon)
380 * TIME_CREATE (unlikely to be supported any time soon)
381 */
382 #define NFSD4_SUPPORTED_ATTRS_WORD0 \
383 (FATTR4_WORD0_SUPPORTED_ATTRS | FATTR4_WORD0_TYPE | FATTR4_WORD0_FH_EXPIRE_TYPE \
384 | FATTR4_WORD0_CHANGE | FATTR4_WORD0_SIZE | FATTR4_WORD0_LINK_SUPPORT \
385 | FATTR4_WORD0_SYMLINK_SUPPORT | FATTR4_WORD0_NAMED_ATTR | FATTR4_WORD0_FSID \
386 | FATTR4_WORD0_UNIQUE_HANDLES | FATTR4_WORD0_LEASE_TIME | FATTR4_WORD0_RDATTR_ERROR \
387 | FATTR4_WORD0_ACLSUPPORT | FATTR4_WORD0_CANSETTIME | FATTR4_WORD0_CASE_INSENSITIVE \
388 | FATTR4_WORD0_CASE_PRESERVING | FATTR4_WORD0_CHOWN_RESTRICTED \
389 | FATTR4_WORD0_FILEHANDLE | FATTR4_WORD0_FILEID | FATTR4_WORD0_FILES_AVAIL \
390 | FATTR4_WORD0_FILES_FREE | FATTR4_WORD0_FILES_TOTAL | FATTR4_WORD0_FS_LOCATIONS | FATTR4_WORD0_HOMOGENEOUS \
391 | FATTR4_WORD0_MAXFILESIZE | FATTR4_WORD0_MAXLINK | FATTR4_WORD0_MAXNAME \
392 | FATTR4_WORD0_MAXREAD | FATTR4_WORD0_MAXWRITE | FATTR4_WORD0_ACL)
393
394 #define NFSD4_SUPPORTED_ATTRS_WORD1 \
395 (FATTR4_WORD1_MODE | FATTR4_WORD1_NO_TRUNC | FATTR4_WORD1_NUMLINKS \
396 | FATTR4_WORD1_OWNER | FATTR4_WORD1_OWNER_GROUP | FATTR4_WORD1_RAWDEV \
397 | FATTR4_WORD1_SPACE_AVAIL | FATTR4_WORD1_SPACE_FREE | FATTR4_WORD1_SPACE_TOTAL \
398 | FATTR4_WORD1_SPACE_USED | FATTR4_WORD1_TIME_ACCESS | FATTR4_WORD1_TIME_ACCESS_SET \
399 | FATTR4_WORD1_TIME_DELTA | FATTR4_WORD1_TIME_METADATA | FATTR4_WORD1_TIME_CREATE \
400 | FATTR4_WORD1_TIME_MODIFY | FATTR4_WORD1_TIME_MODIFY_SET | FATTR4_WORD1_MOUNTED_ON_FILEID)
401
402 #define NFSD4_SUPPORTED_ATTRS_WORD2 0
403
404 /* 4.1 */
405 #ifdef CONFIG_NFSD_PNFS
406 #define PNFSD_SUPPORTED_ATTRS_WORD1 FATTR4_WORD1_FS_LAYOUT_TYPES
407 #define PNFSD_SUPPORTED_ATTRS_WORD2 \
408 (FATTR4_WORD2_LAYOUT_BLKSIZE | FATTR4_WORD2_LAYOUT_TYPES)
409 #else
410 #define PNFSD_SUPPORTED_ATTRS_WORD1 0
411 #define PNFSD_SUPPORTED_ATTRS_WORD2 0
412 #endif /* CONFIG_NFSD_PNFS */
413
414 #define NFSD4_1_SUPPORTED_ATTRS_WORD0 \
415 NFSD4_SUPPORTED_ATTRS_WORD0
416
417 #define NFSD4_1_SUPPORTED_ATTRS_WORD1 \
418 (NFSD4_SUPPORTED_ATTRS_WORD1 | PNFSD_SUPPORTED_ATTRS_WORD1)
419
420 #define NFSD4_1_SUPPORTED_ATTRS_WORD2 \
421 (NFSD4_SUPPORTED_ATTRS_WORD2 | PNFSD_SUPPORTED_ATTRS_WORD2 | \
422 FATTR4_WORD2_SUPPATTR_EXCLCREAT)
423
424 /* 4.2 */
425 #ifdef CONFIG_NFSD_V4_SECURITY_LABEL
426 #define NFSD4_2_SECURITY_ATTRS FATTR4_WORD2_SECURITY_LABEL
427 #else
428 #define NFSD4_2_SECURITY_ATTRS 0
429 #endif
430
431 #define NFSD4_2_SUPPORTED_ATTRS_WORD2 \
432 (NFSD4_1_SUPPORTED_ATTRS_WORD2 | \
433 FATTR4_WORD2_MODE_UMASK | \
434 NFSD4_2_SECURITY_ATTRS | \
435 FATTR4_WORD2_XATTR_SUPPORT)
436
437 extern const u32 nfsd_suppattrs[3][3];
438
439 static inline __be32 nfsd4_set_netaddr(struct sockaddr *addr,
440 struct nfs42_netaddr *netaddr)
441 {
442 struct sockaddr_in *sin = (struct sockaddr_in *)addr;
443 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)addr;
444 unsigned int port;
445 size_t ret_addr, ret_port;
446
447 switch (addr->sa_family) {
448 case AF_INET:
449 port = ntohs(sin->sin_port);
450 sprintf(netaddr->netid, "tcp");
451 netaddr->netid_len = 3;
452 break;
453 case AF_INET6:
454 port = ntohs(sin6->sin6_port);
455 sprintf(netaddr->netid, "tcp6");
456 netaddr->netid_len = 4;
457 break;
458 default:
459 return nfserr_inval;
460 }
461 ret_addr = rpc_ntop(addr, netaddr->addr, sizeof(netaddr->addr));
462 ret_port = snprintf(netaddr->addr + ret_addr,
463 RPCBIND_MAXUADDRLEN + 1 - ret_addr,
464 ".%u.%u", port >> 8, port & 0xff);
465 WARN_ON(ret_port >= RPCBIND_MAXUADDRLEN + 1 - ret_addr);
466 netaddr->addr_len = ret_addr + ret_port;
467 return 0;
468 }
469
470 static inline bool bmval_is_subset(const u32 *bm1, const u32 *bm2)
471 {
472 return !((bm1[0] & ~bm2[0]) ||
473 (bm1[1] & ~bm2[1]) ||
474 (bm1[2] & ~bm2[2]));
475 }
476
477 static inline bool nfsd_attrs_supported(u32 minorversion, const u32 *bmval)
478 {
479 return bmval_is_subset(bmval, nfsd_suppattrs[minorversion]);
480 }
481
482 /* These will return ERR_INVAL if specified in GETATTR or READDIR. */
483 #define NFSD_WRITEONLY_ATTRS_WORD1 \
484 (FATTR4_WORD1_TIME_ACCESS_SET | FATTR4_WORD1_TIME_MODIFY_SET)
485
486 /*
487 * These are the only attrs allowed in CREATE/OPEN/SETATTR. Don't add
488 * a writeable attribute here without also adding code to parse it to
489 * nfsd4_decode_fattr().
490 */
491 #define NFSD_WRITEABLE_ATTRS_WORD0 \
492 (FATTR4_WORD0_SIZE | FATTR4_WORD0_ACL)
493 #define NFSD_WRITEABLE_ATTRS_WORD1 \
494 (FATTR4_WORD1_MODE | FATTR4_WORD1_OWNER | FATTR4_WORD1_OWNER_GROUP \
495 | FATTR4_WORD1_TIME_ACCESS_SET | FATTR4_WORD1_TIME_CREATE \
496 | FATTR4_WORD1_TIME_MODIFY_SET)
497 #ifdef CONFIG_NFSD_V4_SECURITY_LABEL
498 #define MAYBE_FATTR4_WORD2_SECURITY_LABEL \
499 FATTR4_WORD2_SECURITY_LABEL
500 #else
501 #define MAYBE_FATTR4_WORD2_SECURITY_LABEL 0
502 #endif
503 #define NFSD_WRITEABLE_ATTRS_WORD2 \
504 (FATTR4_WORD2_MODE_UMASK \
505 | MAYBE_FATTR4_WORD2_SECURITY_LABEL)
506
507 #define NFSD_SUPPATTR_EXCLCREAT_WORD0 \
508 NFSD_WRITEABLE_ATTRS_WORD0
509 /*
510 * we currently store the exclusive create verifier in the v_{a,m}time
511 * attributes so the client can't set these at create time using EXCLUSIVE4_1
512 */
513 #define NFSD_SUPPATTR_EXCLCREAT_WORD1 \
514 (NFSD_WRITEABLE_ATTRS_WORD1 & \
515 ~(FATTR4_WORD1_TIME_ACCESS_SET | FATTR4_WORD1_TIME_MODIFY_SET))
516 #define NFSD_SUPPATTR_EXCLCREAT_WORD2 \
517 NFSD_WRITEABLE_ATTRS_WORD2
518
519 extern int nfsd4_is_junction(struct dentry *dentry);
520 extern int register_cld_notifier(void);
521 extern void unregister_cld_notifier(void);
522 #ifdef CONFIG_NFSD_V4_2_INTER_SSC
523 extern void nfsd4_ssc_init_umount_work(struct nfsd_net *nn);
524 #endif
525
526 extern void nfsd4_init_leases_net(struct nfsd_net *nn);
527
528 #else /* CONFIG_NFSD_V4 */
529 static inline int nfsd4_is_junction(struct dentry *dentry)
530 {
531 return 0;
532 }
533
534 static inline void nfsd4_init_leases_net(struct nfsd_net *nn) { };
535
536 #define register_cld_notifier() 0
537 #define unregister_cld_notifier() do { } while(0)
538
539 #endif /* CONFIG_NFSD_V4 */
540
541 #endif /* LINUX_NFSD_NFSD_H */
542
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