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 * 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 spinlock_t nfsd_drc_lock;
92 extern unsigned long nfsd_drc_max_mem;
93 extern unsigned long nfsd_drc_mem_used;
94 extern atomic_t nfsd_th_cnt; /* number of available threads */
95
96 extern const struct seq_operations nfs_exports_op;
97
98 /*
99 * Common void argument and result helpers
100 */
101 struct nfsd_voidargs { };
102 struct nfsd_voidres { };
103 bool nfssvc_decode_voidarg(struct svc_rqst *rqstp,
104 struct xdr_stream *xdr);
105 bool nfssvc_encode_voidres(struct svc_rqst *rqstp,
106 struct xdr_stream *xdr);
107
108 /*
109 * Function prototypes.
110 */
111 int nfsd_svc(int n, int *nservers, struct net *net,
112 const struct cred *cred, const char *scope);
113 int nfsd_dispatch(struct svc_rqst *rqstp);
114
115 int nfsd_nrthreads(struct net *);
116 int nfsd_nrpools(struct net *);
117 int nfsd_get_nrthreads(int n, int *, struct net *);
118 int nfsd_set_nrthreads(int n, int *, struct net *);
119 void nfsd_shutdown_threads(struct net *net);
120
121 struct svc_rqst *nfsd_current_rqst(void);
122
123 struct nfsdfs_client {
124 struct kref cl_ref;
125 void (*cl_release)(struct kref *kref);
126 };
127
128 struct nfsdfs_client *get_nfsdfs_client(struct inode *);
129 struct dentry *nfsd_client_mkdir(struct nfsd_net *nn,
130 struct nfsdfs_client *ncl, u32 id,
131 const struct tree_descr *,
132 struct dentry **fdentries);
133 void nfsd_client_rmdir(struct dentry *dentry);
134
135
136 #if defined(CONFIG_NFSD_V2_ACL) || defined(CONFIG_NFSD_V3_ACL)
137 #ifdef CONFIG_NFSD_V2_ACL
138 extern const struct svc_version nfsd_acl_version2;
139 #else
140 #define nfsd_acl_version2 NULL
141 #endif
142 #ifdef CONFIG_NFSD_V3_ACL
143 extern const struct svc_version nfsd_acl_version3;
144 #else
145 #define nfsd_acl_version3 NULL
146 #endif
147 #endif
148
149 #if IS_ENABLED(CONFIG_NFS_LOCALIO)
150 extern const struct svc_version localio_version1;
151 #endif
152
153 struct nfsd_net;
154
155 enum vers_op {NFSD_SET, NFSD_CLEAR, NFSD_TEST, NFSD_AVAIL };
156 int nfsd_vers(struct nfsd_net *nn, int vers, enum vers_op change);
157 int nfsd_minorversion(struct nfsd_net *nn, u32 minorversion, enum vers_op change);
158 void nfsd_reset_versions(struct nfsd_net *nn);
159 int nfsd_create_serv(struct net *net);
160 void nfsd_destroy_serv(struct net *net);
161
162 extern int nfsd_max_blksize;
163
nfsd_v4client(struct svc_rqst * rq)164 static inline int nfsd_v4client(struct svc_rqst *rq)
165 {
166 return rq && rq->rq_prog == NFS_PROGRAM && rq->rq_vers == 4;
167 }
168 static inline struct user_namespace *
nfsd_user_namespace(const struct svc_rqst * rqstp)169 nfsd_user_namespace(const struct svc_rqst *rqstp)
170 {
171 const struct cred *cred = rqstp->rq_xprt->xpt_cred;
172 return cred ? cred->user_ns : &init_user_ns;
173 }
174
175 /*
176 * NFSv4 State
177 */
178 #ifdef CONFIG_NFSD_V4
179 extern unsigned long max_delegations;
180 int nfsd4_init_slabs(void);
181 void nfsd4_free_slabs(void);
182 int nfs4_state_start(void);
183 int nfs4_state_start_net(struct net *net);
184 void nfs4_state_shutdown(void);
185 void nfs4_state_shutdown_net(struct net *net);
186 int nfs4_reset_recoverydir(char *recdir);
187 char * nfs4_recoverydir(void);
188 bool nfsd4_spo_must_allow(struct svc_rqst *rqstp);
189 int nfsd4_create_laundry_wq(void);
190 void nfsd4_destroy_laundry_wq(void);
191 bool nfsd_wait_for_delegreturn(struct svc_rqst *rqstp, struct inode *inode);
192 #else
nfsd4_init_slabs(void)193 static inline int nfsd4_init_slabs(void) { return 0; }
nfsd4_free_slabs(void)194 static inline void nfsd4_free_slabs(void) { }
nfs4_state_start(void)195 static inline int nfs4_state_start(void) { return 0; }
nfs4_state_start_net(struct net * net)196 static inline int nfs4_state_start_net(struct net *net) { return 0; }
nfs4_state_shutdown(void)197 static inline void nfs4_state_shutdown(void) { }
nfs4_state_shutdown_net(struct net * net)198 static inline void nfs4_state_shutdown_net(struct net *net) { }
nfs4_reset_recoverydir(char * recdir)199 static inline int nfs4_reset_recoverydir(char *recdir) { return 0; }
nfs4_recoverydir(void)200 static inline char * nfs4_recoverydir(void) {return NULL; }
nfsd4_spo_must_allow(struct svc_rqst * rqstp)201 static inline bool nfsd4_spo_must_allow(struct svc_rqst *rqstp)
202 {
203 return false;
204 }
nfsd4_create_laundry_wq(void)205 static inline int nfsd4_create_laundry_wq(void) { return 0; };
nfsd4_destroy_laundry_wq(void)206 static inline void nfsd4_destroy_laundry_wq(void) {};
nfsd_wait_for_delegreturn(struct svc_rqst * rqstp,struct inode * inode)207 static inline bool nfsd_wait_for_delegreturn(struct svc_rqst *rqstp,
208 struct inode *inode)
209 {
210 return false;
211 }
212 #endif
213
214 /*
215 * lockd binding
216 */
217 void nfsd_lockd_init(void);
218 void nfsd_lockd_shutdown(void);
219
220
221 /*
222 * These macros provide pre-xdr'ed values for faster operation.
223 */
224 #define nfs_ok cpu_to_be32(NFS_OK)
225 #define nfserr_perm cpu_to_be32(NFSERR_PERM)
226 #define nfserr_noent cpu_to_be32(NFSERR_NOENT)
227 #define nfserr_io cpu_to_be32(NFSERR_IO)
228 #define nfserr_nxio cpu_to_be32(NFSERR_NXIO)
229 #define nfserr_eagain cpu_to_be32(NFSERR_EAGAIN)
230 #define nfserr_acces cpu_to_be32(NFSERR_ACCES)
231 #define nfserr_exist cpu_to_be32(NFSERR_EXIST)
232 #define nfserr_xdev cpu_to_be32(NFSERR_XDEV)
233 #define nfserr_nodev cpu_to_be32(NFSERR_NODEV)
234 #define nfserr_notdir cpu_to_be32(NFSERR_NOTDIR)
235 #define nfserr_isdir cpu_to_be32(NFSERR_ISDIR)
236 #define nfserr_inval cpu_to_be32(NFSERR_INVAL)
237 #define nfserr_fbig cpu_to_be32(NFSERR_FBIG)
238 #define nfserr_nospc cpu_to_be32(NFSERR_NOSPC)
239 #define nfserr_rofs cpu_to_be32(NFSERR_ROFS)
240 #define nfserr_mlink cpu_to_be32(NFSERR_MLINK)
241 #define nfserr_nametoolong cpu_to_be32(NFSERR_NAMETOOLONG)
242 #define nfserr_notempty cpu_to_be32(NFSERR_NOTEMPTY)
243 #define nfserr_dquot cpu_to_be32(NFSERR_DQUOT)
244 #define nfserr_stale cpu_to_be32(NFSERR_STALE)
245 #define nfserr_remote cpu_to_be32(NFSERR_REMOTE)
246 #define nfserr_wflush cpu_to_be32(NFSERR_WFLUSH)
247 #define nfserr_badhandle cpu_to_be32(NFSERR_BADHANDLE)
248 #define nfserr_notsync cpu_to_be32(NFSERR_NOT_SYNC)
249 #define nfserr_badcookie cpu_to_be32(NFSERR_BAD_COOKIE)
250 #define nfserr_notsupp cpu_to_be32(NFSERR_NOTSUPP)
251 #define nfserr_toosmall cpu_to_be32(NFSERR_TOOSMALL)
252 #define nfserr_serverfault cpu_to_be32(NFSERR_SERVERFAULT)
253 #define nfserr_badtype cpu_to_be32(NFSERR_BADTYPE)
254 #define nfserr_jukebox cpu_to_be32(NFSERR_JUKEBOX)
255 #define nfserr_denied cpu_to_be32(NFSERR_DENIED)
256 #define nfserr_deadlock cpu_to_be32(NFSERR_DEADLOCK)
257 #define nfserr_expired cpu_to_be32(NFSERR_EXPIRED)
258 #define nfserr_bad_cookie cpu_to_be32(NFSERR_BAD_COOKIE)
259 #define nfserr_same cpu_to_be32(NFSERR_SAME)
260 #define nfserr_clid_inuse cpu_to_be32(NFSERR_CLID_INUSE)
261 #define nfserr_stale_clientid cpu_to_be32(NFSERR_STALE_CLIENTID)
262 #define nfserr_resource cpu_to_be32(NFSERR_RESOURCE)
263 #define nfserr_moved cpu_to_be32(NFSERR_MOVED)
264 #define nfserr_nofilehandle cpu_to_be32(NFSERR_NOFILEHANDLE)
265 #define nfserr_minor_vers_mismatch cpu_to_be32(NFSERR_MINOR_VERS_MISMATCH)
266 #define nfserr_share_denied cpu_to_be32(NFSERR_SHARE_DENIED)
267 #define nfserr_stale_stateid cpu_to_be32(NFSERR_STALE_STATEID)
268 #define nfserr_old_stateid cpu_to_be32(NFSERR_OLD_STATEID)
269 #define nfserr_bad_stateid cpu_to_be32(NFSERR_BAD_STATEID)
270 #define nfserr_bad_seqid cpu_to_be32(NFSERR_BAD_SEQID)
271 #define nfserr_symlink cpu_to_be32(NFSERR_SYMLINK)
272 #define nfserr_not_same cpu_to_be32(NFSERR_NOT_SAME)
273 #define nfserr_lock_range cpu_to_be32(NFSERR_LOCK_RANGE)
274 #define nfserr_restorefh cpu_to_be32(NFSERR_RESTOREFH)
275 #define nfserr_attrnotsupp cpu_to_be32(NFSERR_ATTRNOTSUPP)
276 #define nfserr_bad_xdr cpu_to_be32(NFSERR_BAD_XDR)
277 #define nfserr_openmode cpu_to_be32(NFSERR_OPENMODE)
278 #define nfserr_badowner cpu_to_be32(NFSERR_BADOWNER)
279 #define nfserr_locks_held cpu_to_be32(NFSERR_LOCKS_HELD)
280 #define nfserr_op_illegal cpu_to_be32(NFSERR_OP_ILLEGAL)
281 #define nfserr_grace cpu_to_be32(NFSERR_GRACE)
282 #define nfserr_no_grace cpu_to_be32(NFSERR_NO_GRACE)
283 #define nfserr_reclaim_bad cpu_to_be32(NFSERR_RECLAIM_BAD)
284 #define nfserr_badname cpu_to_be32(NFSERR_BADNAME)
285 #define nfserr_admin_revoked cpu_to_be32(NFS4ERR_ADMIN_REVOKED)
286 #define nfserr_cb_path_down cpu_to_be32(NFSERR_CB_PATH_DOWN)
287 #define nfserr_locked cpu_to_be32(NFSERR_LOCKED)
288 #define nfserr_wrongsec cpu_to_be32(NFSERR_WRONGSEC)
289 #define nfserr_badiomode cpu_to_be32(NFS4ERR_BADIOMODE)
290 #define nfserr_badlayout cpu_to_be32(NFS4ERR_BADLAYOUT)
291 #define nfserr_bad_session_digest cpu_to_be32(NFS4ERR_BAD_SESSION_DIGEST)
292 #define nfserr_badsession cpu_to_be32(NFS4ERR_BADSESSION)
293 #define nfserr_badslot cpu_to_be32(NFS4ERR_BADSLOT)
294 #define nfserr_complete_already cpu_to_be32(NFS4ERR_COMPLETE_ALREADY)
295 #define nfserr_conn_not_bound_to_session cpu_to_be32(NFS4ERR_CONN_NOT_BOUND_TO_SESSION)
296 #define nfserr_deleg_already_wanted cpu_to_be32(NFS4ERR_DELEG_ALREADY_WANTED)
297 #define nfserr_back_chan_busy cpu_to_be32(NFS4ERR_BACK_CHAN_BUSY)
298 #define nfserr_layouttrylater cpu_to_be32(NFS4ERR_LAYOUTTRYLATER)
299 #define nfserr_layoutunavailable cpu_to_be32(NFS4ERR_LAYOUTUNAVAILABLE)
300 #define nfserr_nomatching_layout cpu_to_be32(NFS4ERR_NOMATCHING_LAYOUT)
301 #define nfserr_recallconflict cpu_to_be32(NFS4ERR_RECALLCONFLICT)
302 #define nfserr_unknown_layouttype cpu_to_be32(NFS4ERR_UNKNOWN_LAYOUTTYPE)
303 #define nfserr_seq_misordered cpu_to_be32(NFS4ERR_SEQ_MISORDERED)
304 #define nfserr_sequence_pos cpu_to_be32(NFS4ERR_SEQUENCE_POS)
305 #define nfserr_req_too_big cpu_to_be32(NFS4ERR_REQ_TOO_BIG)
306 #define nfserr_rep_too_big cpu_to_be32(NFS4ERR_REP_TOO_BIG)
307 #define nfserr_rep_too_big_to_cache cpu_to_be32(NFS4ERR_REP_TOO_BIG_TO_CACHE)
308 #define nfserr_retry_uncached_rep cpu_to_be32(NFS4ERR_RETRY_UNCACHED_REP)
309 #define nfserr_unsafe_compound cpu_to_be32(NFS4ERR_UNSAFE_COMPOUND)
310 #define nfserr_too_many_ops cpu_to_be32(NFS4ERR_TOO_MANY_OPS)
311 #define nfserr_op_not_in_session cpu_to_be32(NFS4ERR_OP_NOT_IN_SESSION)
312 #define nfserr_hash_alg_unsupp cpu_to_be32(NFS4ERR_HASH_ALG_UNSUPP)
313 #define nfserr_clientid_busy cpu_to_be32(NFS4ERR_CLIENTID_BUSY)
314 #define nfserr_pnfs_io_hole cpu_to_be32(NFS4ERR_PNFS_IO_HOLE)
315 #define nfserr_seq_false_retry cpu_to_be32(NFS4ERR_SEQ_FALSE_RETRY)
316 #define nfserr_bad_high_slot cpu_to_be32(NFS4ERR_BAD_HIGH_SLOT)
317 #define nfserr_deadsession cpu_to_be32(NFS4ERR_DEADSESSION)
318 #define nfserr_encr_alg_unsupp cpu_to_be32(NFS4ERR_ENCR_ALG_UNSUPP)
319 #define nfserr_pnfs_no_layout cpu_to_be32(NFS4ERR_PNFS_NO_LAYOUT)
320 #define nfserr_not_only_op cpu_to_be32(NFS4ERR_NOT_ONLY_OP)
321 #define nfserr_wrong_cred cpu_to_be32(NFS4ERR_WRONG_CRED)
322 #define nfserr_wrong_type cpu_to_be32(NFS4ERR_WRONG_TYPE)
323 #define nfserr_dirdeleg_unavail cpu_to_be32(NFS4ERR_DIRDELEG_UNAVAIL)
324 #define nfserr_reject_deleg cpu_to_be32(NFS4ERR_REJECT_DELEG)
325 #define nfserr_returnconflict cpu_to_be32(NFS4ERR_RETURNCONFLICT)
326 #define nfserr_deleg_revoked cpu_to_be32(NFS4ERR_DELEG_REVOKED)
327 #define nfserr_partner_notsupp cpu_to_be32(NFS4ERR_PARTNER_NOTSUPP)
328 #define nfserr_partner_no_auth cpu_to_be32(NFS4ERR_PARTNER_NO_AUTH)
329 #define nfserr_union_notsupp cpu_to_be32(NFS4ERR_UNION_NOTSUPP)
330 #define nfserr_offload_denied cpu_to_be32(NFS4ERR_OFFLOAD_DENIED)
331 #define nfserr_wrong_lfs cpu_to_be32(NFS4ERR_WRONG_LFS)
332 #define nfserr_badlabel cpu_to_be32(NFS4ERR_BADLABEL)
333 #define nfserr_file_open cpu_to_be32(NFS4ERR_FILE_OPEN)
334 #define nfserr_xattr2big cpu_to_be32(NFS4ERR_XATTR2BIG)
335 #define nfserr_noxattr cpu_to_be32(NFS4ERR_NOXATTR)
336
337 /*
338 * Error codes for internal use. We use enum to choose numbers that are
339 * not already assigned, then covert to be32 resulting in a number that
340 * cannot conflict with any existing be32 nfserr value.
341 */
342 enum {
343 NFSERR_DROPIT = NFS4ERR_FIRST_FREE,
344 /* if a request fails due to kmalloc failure, it gets dropped.
345 * Client should resend eventually
346 */
347 #define nfserr_dropit cpu_to_be32(NFSERR_DROPIT)
348
349 /* end-of-file indicator in readdir */
350 NFSERR_EOF,
351 #define nfserr_eof cpu_to_be32(NFSERR_EOF)
352
353 /* replay detected */
354 NFSERR_REPLAY_ME,
355 #define nfserr_replay_me cpu_to_be32(NFSERR_REPLAY_ME)
356
357 /* nfs41 replay detected */
358 NFSERR_REPLAY_CACHE,
359 #define nfserr_replay_cache cpu_to_be32(NFSERR_REPLAY_CACHE)
360
361 /* symlink found where dir expected - handled differently to
362 * other symlink found errors by NFSv3.
363 */
364 NFSERR_SYMLINK_NOT_DIR,
365 #define nfserr_symlink_not_dir cpu_to_be32(NFSERR_SYMLINK_NOT_DIR)
366 };
367
368 /* Check for dir entries '.' and '..' */
369 #define isdotent(n, l) (l < 3 && n[0] == '.' && (l == 1 || n[1] == '.'))
370
371 #ifdef CONFIG_NFSD_V4
372
373 /* before processing a COMPOUND operation, we have to check that there
374 * is enough space in the buffer for XDR encode to succeed. otherwise,
375 * we might process an operation with side effects, and be unable to
376 * tell the client that the operation succeeded.
377 *
378 * COMPOUND_SLACK_SPACE - this is the minimum bytes of buffer space
379 * needed to encode an "ordinary" _successful_ operation. (GETATTR,
380 * READ, READDIR, and READLINK have their own buffer checks.) if we
381 * fall below this level, we fail the next operation with NFS4ERR_RESOURCE.
382 *
383 * COMPOUND_ERR_SLACK_SPACE - this is the minimum bytes of buffer space
384 * needed to encode an operation which has failed with NFS4ERR_RESOURCE.
385 * care is taken to ensure that we never fall below this level for any
386 * reason.
387 */
388 #define COMPOUND_SLACK_SPACE 140 /* OP_GETFH */
389 #define COMPOUND_ERR_SLACK_SPACE 16 /* OP_SETATTR */
390
391 #define NFSD_LAUNDROMAT_MINTIMEOUT 1 /* seconds */
392 #define NFSD_COURTESY_CLIENT_TIMEOUT (24 * 60 * 60) /* seconds */
393 #define NFSD_CLIENT_MAX_TRIM_PER_RUN 128
394 #define NFS4_CLIENTS_PER_GB 1024
395 #define NFSD_DELEGRETURN_TIMEOUT (HZ / 34) /* 30ms */
396 #define NFSD_CB_GETATTR_TIMEOUT NFSD_DELEGRETURN_TIMEOUT
397
398 /*
399 * The following attributes are currently not supported by the NFSv4 server:
400 * ARCHIVE (deprecated anyway)
401 * HIDDEN (unlikely to be supported any time soon)
402 * MIMETYPE (unlikely to be supported any time soon)
403 * QUOTA_* (will be supported in a forthcoming patch)
404 * SYSTEM (unlikely to be supported any time soon)
405 * TIME_BACKUP (unlikely to be supported any time soon)
406 * TIME_CREATE (unlikely to be supported any time soon)
407 */
408 #define NFSD4_SUPPORTED_ATTRS_WORD0 \
409 (FATTR4_WORD0_SUPPORTED_ATTRS | FATTR4_WORD0_TYPE | FATTR4_WORD0_FH_EXPIRE_TYPE \
410 | FATTR4_WORD0_CHANGE | FATTR4_WORD0_SIZE | FATTR4_WORD0_LINK_SUPPORT \
411 | FATTR4_WORD0_SYMLINK_SUPPORT | FATTR4_WORD0_NAMED_ATTR | FATTR4_WORD0_FSID \
412 | FATTR4_WORD0_UNIQUE_HANDLES | FATTR4_WORD0_LEASE_TIME | FATTR4_WORD0_RDATTR_ERROR \
413 | FATTR4_WORD0_ACLSUPPORT | FATTR4_WORD0_CANSETTIME | FATTR4_WORD0_CASE_INSENSITIVE \
414 | FATTR4_WORD0_CASE_PRESERVING | FATTR4_WORD0_CHOWN_RESTRICTED \
415 | FATTR4_WORD0_FILEHANDLE | FATTR4_WORD0_FILEID | FATTR4_WORD0_FILES_AVAIL \
416 | FATTR4_WORD0_FILES_FREE | FATTR4_WORD0_FILES_TOTAL | FATTR4_WORD0_FS_LOCATIONS | FATTR4_WORD0_HOMOGENEOUS \
417 | FATTR4_WORD0_MAXFILESIZE | FATTR4_WORD0_MAXLINK | FATTR4_WORD0_MAXNAME \
418 | FATTR4_WORD0_MAXREAD | FATTR4_WORD0_MAXWRITE | FATTR4_WORD0_ACL)
419
420 #define NFSD4_SUPPORTED_ATTRS_WORD1 \
421 (FATTR4_WORD1_MODE | FATTR4_WORD1_NO_TRUNC | FATTR4_WORD1_NUMLINKS \
422 | FATTR4_WORD1_OWNER | FATTR4_WORD1_OWNER_GROUP | FATTR4_WORD1_RAWDEV \
423 | FATTR4_WORD1_SPACE_AVAIL | FATTR4_WORD1_SPACE_FREE | FATTR4_WORD1_SPACE_TOTAL \
424 | FATTR4_WORD1_SPACE_USED | FATTR4_WORD1_TIME_ACCESS | FATTR4_WORD1_TIME_ACCESS_SET \
425 | FATTR4_WORD1_TIME_DELTA | FATTR4_WORD1_TIME_METADATA | FATTR4_WORD1_TIME_CREATE \
426 | FATTR4_WORD1_TIME_MODIFY | FATTR4_WORD1_TIME_MODIFY_SET | FATTR4_WORD1_MOUNTED_ON_FILEID)
427
428 #define NFSD4_SUPPORTED_ATTRS_WORD2 0
429
430 /* 4.1 */
431 #ifdef CONFIG_NFSD_PNFS
432 #define PNFSD_SUPPORTED_ATTRS_WORD1 FATTR4_WORD1_FS_LAYOUT_TYPES
433 #define PNFSD_SUPPORTED_ATTRS_WORD2 \
434 (FATTR4_WORD2_LAYOUT_BLKSIZE | FATTR4_WORD2_LAYOUT_TYPES)
435 #else
436 #define PNFSD_SUPPORTED_ATTRS_WORD1 0
437 #define PNFSD_SUPPORTED_ATTRS_WORD2 0
438 #endif /* CONFIG_NFSD_PNFS */
439
440 #define NFSD4_1_SUPPORTED_ATTRS_WORD0 \
441 NFSD4_SUPPORTED_ATTRS_WORD0
442
443 #define NFSD4_1_SUPPORTED_ATTRS_WORD1 \
444 (NFSD4_SUPPORTED_ATTRS_WORD1 | PNFSD_SUPPORTED_ATTRS_WORD1)
445
446 #define NFSD4_1_SUPPORTED_ATTRS_WORD2 \
447 (NFSD4_SUPPORTED_ATTRS_WORD2 | PNFSD_SUPPORTED_ATTRS_WORD2 | \
448 FATTR4_WORD2_SUPPATTR_EXCLCREAT)
449
450 /* 4.2 */
451 #ifdef CONFIG_NFSD_V4_SECURITY_LABEL
452 #define NFSD4_2_SECURITY_ATTRS FATTR4_WORD2_SECURITY_LABEL
453 #else
454 #define NFSD4_2_SECURITY_ATTRS 0
455 #endif
456
457 #define NFSD4_2_SUPPORTED_ATTRS_WORD2 \
458 (NFSD4_1_SUPPORTED_ATTRS_WORD2 | \
459 FATTR4_WORD2_MODE_UMASK | \
460 NFSD4_2_SECURITY_ATTRS | \
461 FATTR4_WORD2_XATTR_SUPPORT)
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
533 #define NFSD_SUPPATTR_EXCLCREAT_WORD0 \
534 NFSD_WRITEABLE_ATTRS_WORD0
535 /*
536 * we currently store the exclusive create verifier in the v_{a,m}time
537 * attributes so the client can't set these at create time using EXCLUSIVE4_1
538 */
539 #define NFSD_SUPPATTR_EXCLCREAT_WORD1 \
540 (NFSD_WRITEABLE_ATTRS_WORD1 & \
541 ~(FATTR4_WORD1_TIME_ACCESS_SET | FATTR4_WORD1_TIME_MODIFY_SET))
542 #define NFSD_SUPPATTR_EXCLCREAT_WORD2 \
543 NFSD_WRITEABLE_ATTRS_WORD2
544
545 extern int nfsd4_is_junction(struct dentry *dentry);
546 extern int register_cld_notifier(void);
547 extern void unregister_cld_notifier(void);
548 #ifdef CONFIG_NFSD_V4_2_INTER_SSC
549 extern void nfsd4_ssc_init_umount_work(struct nfsd_net *nn);
550 #endif
551
552 extern void nfsd4_init_leases_net(struct nfsd_net *nn);
553
554 #else /* CONFIG_NFSD_V4 */
nfsd4_is_junction(struct dentry * dentry)555 static inline int nfsd4_is_junction(struct dentry *dentry)
556 {
557 return 0;
558 }
559
nfsd4_init_leases_net(struct nfsd_net * nn)560 static inline void nfsd4_init_leases_net(struct nfsd_net *nn) { };
561
562 #define register_cld_notifier() 0
563 #define unregister_cld_notifier() do { } while(0)
564
565 #endif /* CONFIG_NFSD_V4 */
566
567 #endif /* LINUX_NFSD_NFSD_H */
568