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1/*
2 * Hodge-podge collection of knfsd-related stuff.
3 * I will sort this out later.
4 *
5 * Copyright (C) 1995-1997 Olaf Kirch <okir@monad.swb.de>
6 */
7
8#ifndef LINUX_NFSD_NFSD_H
9#define LINUX_NFSD_NFSD_H
10
11#include <linux/types.h>
12#include <linux/mount.h>
13
14#include <linux/nfs.h>
15#include <linux/nfs2.h>
16#include <linux/nfs3.h>
17#include <linux/nfs4.h>
18#include <linux/sunrpc/msg_prot.h>
19
20#include <linux/nfsd/debug.h>
21#include <linux/nfsd/export.h>
22#include <linux/nfsd/stats.h>
23
24/*
25 * nfsd version
26 */
27#define NFSD_SUPPORTED_MINOR_VERSION 1
28/*
29 * Maximum blocksizes supported by daemon under various circumstances.
30 */
31#define NFSSVC_MAXBLKSIZE RPCSVC_MAXPAYLOAD
32/* NFSv2 is limited by the protocol specification, see RFC 1094 */
33#define NFSSVC_MAXBLKSIZE_V2 (8*1024)
34
35
36/*
37 * Largest number of bytes we need to allocate for an NFS
38 * call or reply. Used to control buffer sizes. We use
39 * the length of v3 WRITE, READDIR and READDIR replies
40 * which are an RPC header, up to 26 XDR units of reply
41 * data, and some page data.
42 *
43 * Note that accuracy here doesn't matter too much as the
44 * size is rounded up to a page size when allocating space.
45 */
46#define NFSD_BUFSIZE ((RPC_MAX_HEADER_WITH_AUTH+26)*XDR_UNIT + NFSSVC_MAXBLKSIZE)
47
48struct readdir_cd {
49 __be32 err; /* 0, nfserr, or nfserr_eof */
50};
51
52
53extern struct svc_program nfsd_program;
54extern struct svc_version nfsd_version2, nfsd_version3,
55 nfsd_version4;
56extern u32 nfsd_supported_minorversion;
57extern struct mutex nfsd_mutex;
58extern struct svc_serv *nfsd_serv;
59extern spinlock_t nfsd_drc_lock;
60extern unsigned int nfsd_drc_max_mem;
61extern unsigned int nfsd_drc_mem_used;
62
63extern const struct seq_operations nfs_exports_op;
64
65/*
66 * Function prototypes.
67 */
68int nfsd_svc(unsigned short port, int nrservs);
69int nfsd_dispatch(struct svc_rqst *rqstp, __be32 *statp);
70
71int nfsd_nrthreads(void);
72int nfsd_nrpools(void);
73int nfsd_get_nrthreads(int n, int *);
74int nfsd_set_nrthreads(int n, int *);
75
76static inline void nfsd_destroy(struct net *net)
77{
78 int destroy = (nfsd_serv->sv_nrthreads == 1);
79
80 if (destroy)
81 svc_shutdown_net(nfsd_serv, net);
82 svc_destroy(nfsd_serv);
83 if (destroy)
84 nfsd_serv = NULL;
85}
86
87#if defined(CONFIG_NFSD_V2_ACL) || defined(CONFIG_NFSD_V3_ACL)
88#ifdef CONFIG_NFSD_V2_ACL
89extern struct svc_version nfsd_acl_version2;
90#else
91#define nfsd_acl_version2 NULL
92#endif
93#ifdef CONFIG_NFSD_V3_ACL
94extern struct svc_version nfsd_acl_version3;
95#else
96#define nfsd_acl_version3 NULL
97#endif
98#endif
99
100enum vers_op {NFSD_SET, NFSD_CLEAR, NFSD_TEST, NFSD_AVAIL };
101int nfsd_vers(int vers, enum vers_op change);
102int nfsd_minorversion(u32 minorversion, enum vers_op change);
103void nfsd_reset_versions(void);
104int nfsd_create_serv(void);
105
106extern int nfsd_max_blksize;
107
108static inline int nfsd_v4client(struct svc_rqst *rq)
109{
110 return rq->rq_prog == NFS_PROGRAM && rq->rq_vers == 4;
111}
112
113/*
114 * NFSv4 State
115 */
116#ifdef CONFIG_NFSD_V4
117extern unsigned int max_delegations;
118void nfs4_state_init(void);
119int nfsd4_init_slabs(void);
120void nfsd4_free_slabs(void);
121int nfs4_state_start(void);
122void nfs4_state_shutdown(void);
123void nfs4_reset_lease(time_t leasetime);
124int nfs4_reset_recoverydir(char *recdir);
125#else
126static inline void nfs4_state_init(void) { }
127static inline int nfsd4_init_slabs(void) { return 0; }
128static inline void nfsd4_free_slabs(void) { }
129static inline int nfs4_state_start(void) { return 0; }
130static inline void nfs4_state_shutdown(void) { }
131static inline void nfs4_reset_lease(time_t leasetime) { }
132static inline int nfs4_reset_recoverydir(char *recdir) { return 0; }
133#endif
134
135/*
136 * lockd binding
137 */
138void nfsd_lockd_init(void);
139void nfsd_lockd_shutdown(void);
140
141
142/*
143 * These macros provide pre-xdr'ed values for faster operation.
144 */
145#define nfs_ok cpu_to_be32(NFS_OK)
146#define nfserr_perm cpu_to_be32(NFSERR_PERM)
147#define nfserr_noent cpu_to_be32(NFSERR_NOENT)
148#define nfserr_io cpu_to_be32(NFSERR_IO)
149#define nfserr_nxio cpu_to_be32(NFSERR_NXIO)
150#define nfserr_eagain cpu_to_be32(NFSERR_EAGAIN)
151#define nfserr_acces cpu_to_be32(NFSERR_ACCES)
152#define nfserr_exist cpu_to_be32(NFSERR_EXIST)
153#define nfserr_xdev cpu_to_be32(NFSERR_XDEV)
154#define nfserr_nodev cpu_to_be32(NFSERR_NODEV)
155#define nfserr_notdir cpu_to_be32(NFSERR_NOTDIR)
156#define nfserr_isdir cpu_to_be32(NFSERR_ISDIR)
157#define nfserr_inval cpu_to_be32(NFSERR_INVAL)
158#define nfserr_fbig cpu_to_be32(NFSERR_FBIG)
159#define nfserr_nospc cpu_to_be32(NFSERR_NOSPC)
160#define nfserr_rofs cpu_to_be32(NFSERR_ROFS)
161#define nfserr_mlink cpu_to_be32(NFSERR_MLINK)
162#define nfserr_opnotsupp cpu_to_be32(NFSERR_OPNOTSUPP)
163#define nfserr_nametoolong cpu_to_be32(NFSERR_NAMETOOLONG)
164#define nfserr_notempty cpu_to_be32(NFSERR_NOTEMPTY)
165#define nfserr_dquot cpu_to_be32(NFSERR_DQUOT)
166#define nfserr_stale cpu_to_be32(NFSERR_STALE)
167#define nfserr_remote cpu_to_be32(NFSERR_REMOTE)
168#define nfserr_wflush cpu_to_be32(NFSERR_WFLUSH)
169#define nfserr_badhandle cpu_to_be32(NFSERR_BADHANDLE)
170#define nfserr_notsync cpu_to_be32(NFSERR_NOT_SYNC)
171#define nfserr_badcookie cpu_to_be32(NFSERR_BAD_COOKIE)
172#define nfserr_notsupp cpu_to_be32(NFSERR_NOTSUPP)
173#define nfserr_toosmall cpu_to_be32(NFSERR_TOOSMALL)
174#define nfserr_serverfault cpu_to_be32(NFSERR_SERVERFAULT)
175#define nfserr_badtype cpu_to_be32(NFSERR_BADTYPE)
176#define nfserr_jukebox cpu_to_be32(NFSERR_JUKEBOX)
177#define nfserr_denied cpu_to_be32(NFSERR_DENIED)
178#define nfserr_deadlock cpu_to_be32(NFSERR_DEADLOCK)
179#define nfserr_expired cpu_to_be32(NFSERR_EXPIRED)
180#define nfserr_bad_cookie cpu_to_be32(NFSERR_BAD_COOKIE)
181#define nfserr_same cpu_to_be32(NFSERR_SAME)
182#define nfserr_clid_inuse cpu_to_be32(NFSERR_CLID_INUSE)
183#define nfserr_stale_clientid cpu_to_be32(NFSERR_STALE_CLIENTID)
184#define nfserr_resource cpu_to_be32(NFSERR_RESOURCE)
185#define nfserr_moved cpu_to_be32(NFSERR_MOVED)
186#define nfserr_nofilehandle cpu_to_be32(NFSERR_NOFILEHANDLE)
187#define nfserr_minor_vers_mismatch cpu_to_be32(NFSERR_MINOR_VERS_MISMATCH)
188#define nfserr_share_denied cpu_to_be32(NFSERR_SHARE_DENIED)
189#define nfserr_stale_stateid cpu_to_be32(NFSERR_STALE_STATEID)
190#define nfserr_old_stateid cpu_to_be32(NFSERR_OLD_STATEID)
191#define nfserr_bad_stateid cpu_to_be32(NFSERR_BAD_STATEID)
192#define nfserr_bad_seqid cpu_to_be32(NFSERR_BAD_SEQID)
193#define nfserr_symlink cpu_to_be32(NFSERR_SYMLINK)
194#define nfserr_not_same cpu_to_be32(NFSERR_NOT_SAME)
195#define nfserr_lock_range cpu_to_be32(NFSERR_LOCK_RANGE)
196#define nfserr_restorefh cpu_to_be32(NFSERR_RESTOREFH)
197#define nfserr_attrnotsupp cpu_to_be32(NFSERR_ATTRNOTSUPP)
198#define nfserr_bad_xdr cpu_to_be32(NFSERR_BAD_XDR)
199#define nfserr_openmode cpu_to_be32(NFSERR_OPENMODE)
200#define nfserr_badowner cpu_to_be32(NFSERR_BADOWNER)
201#define nfserr_locks_held cpu_to_be32(NFSERR_LOCKS_HELD)
202#define nfserr_op_illegal cpu_to_be32(NFSERR_OP_ILLEGAL)
203#define nfserr_grace cpu_to_be32(NFSERR_GRACE)
204#define nfserr_no_grace cpu_to_be32(NFSERR_NO_GRACE)
205#define nfserr_reclaim_bad cpu_to_be32(NFSERR_RECLAIM_BAD)
206#define nfserr_badname cpu_to_be32(NFSERR_BADNAME)
207#define nfserr_cb_path_down cpu_to_be32(NFSERR_CB_PATH_DOWN)
208#define nfserr_locked cpu_to_be32(NFSERR_LOCKED)
209#define nfserr_wrongsec cpu_to_be32(NFSERR_WRONGSEC)
210#define nfserr_badiomode cpu_to_be32(NFS4ERR_BADIOMODE)
211#define nfserr_badlayout cpu_to_be32(NFS4ERR_BADLAYOUT)
212#define nfserr_bad_session_digest cpu_to_be32(NFS4ERR_BAD_SESSION_DIGEST)
213#define nfserr_badsession cpu_to_be32(NFS4ERR_BADSESSION)
214#define nfserr_badslot cpu_to_be32(NFS4ERR_BADSLOT)
215#define nfserr_complete_already cpu_to_be32(NFS4ERR_COMPLETE_ALREADY)
216#define nfserr_conn_not_bound_to_session cpu_to_be32(NFS4ERR_CONN_NOT_BOUND_TO_SESSION)
217#define nfserr_deleg_already_wanted cpu_to_be32(NFS4ERR_DELEG_ALREADY_WANTED)
218#define nfserr_back_chan_busy cpu_to_be32(NFS4ERR_BACK_CHAN_BUSY)
219#define nfserr_layouttrylater cpu_to_be32(NFS4ERR_LAYOUTTRYLATER)
220#define nfserr_layoutunavailable cpu_to_be32(NFS4ERR_LAYOUTUNAVAILABLE)
221#define nfserr_nomatching_layout cpu_to_be32(NFS4ERR_NOMATCHING_LAYOUT)
222#define nfserr_recallconflict cpu_to_be32(NFS4ERR_RECALLCONFLICT)
223#define nfserr_unknown_layouttype cpu_to_be32(NFS4ERR_UNKNOWN_LAYOUTTYPE)
224#define nfserr_seq_misordered cpu_to_be32(NFS4ERR_SEQ_MISORDERED)
225#define nfserr_sequence_pos cpu_to_be32(NFS4ERR_SEQUENCE_POS)
226#define nfserr_req_too_big cpu_to_be32(NFS4ERR_REQ_TOO_BIG)
227#define nfserr_rep_too_big cpu_to_be32(NFS4ERR_REP_TOO_BIG)
228#define nfserr_rep_too_big_to_cache cpu_to_be32(NFS4ERR_REP_TOO_BIG_TO_CACHE)
229#define nfserr_retry_uncached_rep cpu_to_be32(NFS4ERR_RETRY_UNCACHED_REP)
230#define nfserr_unsafe_compound cpu_to_be32(NFS4ERR_UNSAFE_COMPOUND)
231#define nfserr_too_many_ops cpu_to_be32(NFS4ERR_TOO_MANY_OPS)
232#define nfserr_op_not_in_session cpu_to_be32(NFS4ERR_OP_NOT_IN_SESSION)
233#define nfserr_hash_alg_unsupp cpu_to_be32(NFS4ERR_HASH_ALG_UNSUPP)
234#define nfserr_clientid_busy cpu_to_be32(NFS4ERR_CLIENTID_BUSY)
235#define nfserr_pnfs_io_hole cpu_to_be32(NFS4ERR_PNFS_IO_HOLE)
236#define nfserr_seq_false_retry cpu_to_be32(NFS4ERR_SEQ_FALSE_RETRY)
237#define nfserr_bad_high_slot cpu_to_be32(NFS4ERR_BAD_HIGH_SLOT)
238#define nfserr_deadsession cpu_to_be32(NFS4ERR_DEADSESSION)
239#define nfserr_encr_alg_unsupp cpu_to_be32(NFS4ERR_ENCR_ALG_UNSUPP)
240#define nfserr_pnfs_no_layout cpu_to_be32(NFS4ERR_PNFS_NO_LAYOUT)
241#define nfserr_not_only_op cpu_to_be32(NFS4ERR_NOT_ONLY_OP)
242#define nfserr_wrong_cred cpu_to_be32(NFS4ERR_WRONG_CRED)
243#define nfserr_wrong_type cpu_to_be32(NFS4ERR_WRONG_TYPE)
244#define nfserr_dirdeleg_unavail cpu_to_be32(NFS4ERR_DIRDELEG_UNAVAIL)
245#define nfserr_reject_deleg cpu_to_be32(NFS4ERR_REJECT_DELEG)
246#define nfserr_returnconflict cpu_to_be32(NFS4ERR_RETURNCONFLICT)
247#define nfserr_deleg_revoked cpu_to_be32(NFS4ERR_DELEG_REVOKED)
248
249/* error codes for internal use */
250/* if a request fails due to kmalloc failure, it gets dropped.
251 * Client should resend eventually
252 */
253#define nfserr_dropit cpu_to_be32(30000)
254/* end-of-file indicator in readdir */
255#define nfserr_eof cpu_to_be32(30001)
256/* replay detected */
257#define nfserr_replay_me cpu_to_be32(11001)
258/* nfs41 replay detected */
259#define nfserr_replay_cache cpu_to_be32(11002)
260
261/* Check for dir entries '.' and '..' */
262#define isdotent(n, l) (l < 3 && n[0] == '.' && (l == 1 || n[1] == '.'))
263
264/*
265 * Time of server startup
266 */
267extern struct timeval nfssvc_boot;
268
269#ifdef CONFIG_NFSD_V4
270
271extern time_t nfsd4_lease;
272extern time_t nfsd4_grace;
273
274/* before processing a COMPOUND operation, we have to check that there
275 * is enough space in the buffer for XDR encode to succeed. otherwise,
276 * we might process an operation with side effects, and be unable to
277 * tell the client that the operation succeeded.
278 *
279 * COMPOUND_SLACK_SPACE - this is the minimum bytes of buffer space
280 * needed to encode an "ordinary" _successful_ operation. (GETATTR,
281 * READ, READDIR, and READLINK have their own buffer checks.) if we
282 * fall below this level, we fail the next operation with NFS4ERR_RESOURCE.
283 *
284 * COMPOUND_ERR_SLACK_SPACE - this is the minimum bytes of buffer space
285 * needed to encode an operation which has failed with NFS4ERR_RESOURCE.
286 * care is taken to ensure that we never fall below this level for any
287 * reason.
288 */
289#define COMPOUND_SLACK_SPACE 140 /* OP_GETFH */
290#define COMPOUND_ERR_SLACK_SPACE 12 /* OP_SETATTR */
291
292#define NFSD_LAUNDROMAT_MINTIMEOUT 1 /* seconds */
293
294/*
295 * The following attributes are currently not supported by the NFSv4 server:
296 * ARCHIVE (deprecated anyway)
297 * HIDDEN (unlikely to be supported any time soon)
298 * MIMETYPE (unlikely to be supported any time soon)
299 * QUOTA_* (will be supported in a forthcoming patch)
300 * SYSTEM (unlikely to be supported any time soon)
301 * TIME_BACKUP (unlikely to be supported any time soon)
302 * TIME_CREATE (unlikely to be supported any time soon)
303 */
304#define NFSD4_SUPPORTED_ATTRS_WORD0 \
305(FATTR4_WORD0_SUPPORTED_ATTRS | FATTR4_WORD0_TYPE | FATTR4_WORD0_FH_EXPIRE_TYPE \
306 | FATTR4_WORD0_CHANGE | FATTR4_WORD0_SIZE | FATTR4_WORD0_LINK_SUPPORT \
307 | FATTR4_WORD0_SYMLINK_SUPPORT | FATTR4_WORD0_NAMED_ATTR | FATTR4_WORD0_FSID \
308 | FATTR4_WORD0_UNIQUE_HANDLES | FATTR4_WORD0_LEASE_TIME | FATTR4_WORD0_RDATTR_ERROR \
309 | FATTR4_WORD0_ACLSUPPORT | FATTR4_WORD0_CANSETTIME | FATTR4_WORD0_CASE_INSENSITIVE \
310 | FATTR4_WORD0_CASE_PRESERVING | FATTR4_WORD0_CHOWN_RESTRICTED \
311 | FATTR4_WORD0_FILEHANDLE | FATTR4_WORD0_FILEID | FATTR4_WORD0_FILES_AVAIL \
312 | FATTR4_WORD0_FILES_FREE | FATTR4_WORD0_FILES_TOTAL | FATTR4_WORD0_FS_LOCATIONS | FATTR4_WORD0_HOMOGENEOUS \
313 | FATTR4_WORD0_MAXFILESIZE | FATTR4_WORD0_MAXLINK | FATTR4_WORD0_MAXNAME \
314 | FATTR4_WORD0_MAXREAD | FATTR4_WORD0_MAXWRITE | FATTR4_WORD0_ACL)
315
316#define NFSD4_SUPPORTED_ATTRS_WORD1 \
317(FATTR4_WORD1_MODE | FATTR4_WORD1_NO_TRUNC | FATTR4_WORD1_NUMLINKS \
318 | FATTR4_WORD1_OWNER | FATTR4_WORD1_OWNER_GROUP | FATTR4_WORD1_RAWDEV \
319 | FATTR4_WORD1_SPACE_AVAIL | FATTR4_WORD1_SPACE_FREE | FATTR4_WORD1_SPACE_TOTAL \
320 | FATTR4_WORD1_SPACE_USED | FATTR4_WORD1_TIME_ACCESS | FATTR4_WORD1_TIME_ACCESS_SET \
321 | FATTR4_WORD1_TIME_DELTA | FATTR4_WORD1_TIME_METADATA \
322 | FATTR4_WORD1_TIME_MODIFY | FATTR4_WORD1_TIME_MODIFY_SET | FATTR4_WORD1_MOUNTED_ON_FILEID)
323
324#define NFSD4_SUPPORTED_ATTRS_WORD2 0
325
326#define NFSD4_1_SUPPORTED_ATTRS_WORD0 \
327 NFSD4_SUPPORTED_ATTRS_WORD0
328
329#define NFSD4_1_SUPPORTED_ATTRS_WORD1 \
330 NFSD4_SUPPORTED_ATTRS_WORD1
331
332#define NFSD4_1_SUPPORTED_ATTRS_WORD2 \
333 (NFSD4_SUPPORTED_ATTRS_WORD2 | FATTR4_WORD2_SUPPATTR_EXCLCREAT)
334
335static inline u32 nfsd_suppattrs0(u32 minorversion)
336{
337 return minorversion ? NFSD4_1_SUPPORTED_ATTRS_WORD0
338 : NFSD4_SUPPORTED_ATTRS_WORD0;
339}
340
341static inline u32 nfsd_suppattrs1(u32 minorversion)
342{
343 return minorversion ? NFSD4_1_SUPPORTED_ATTRS_WORD1
344 : NFSD4_SUPPORTED_ATTRS_WORD1;
345}
346
347static inline u32 nfsd_suppattrs2(u32 minorversion)
348{
349 return minorversion ? NFSD4_1_SUPPORTED_ATTRS_WORD2
350 : NFSD4_SUPPORTED_ATTRS_WORD2;
351}
352
353/* These will return ERR_INVAL if specified in GETATTR or READDIR. */
354#define NFSD_WRITEONLY_ATTRS_WORD1 \
355 (FATTR4_WORD1_TIME_ACCESS_SET | FATTR4_WORD1_TIME_MODIFY_SET)
356
357/* These are the only attrs allowed in CREATE/OPEN/SETATTR. */
358#define NFSD_WRITEABLE_ATTRS_WORD0 \
359 (FATTR4_WORD0_SIZE | FATTR4_WORD0_ACL)
360#define NFSD_WRITEABLE_ATTRS_WORD1 \
361 (FATTR4_WORD1_MODE | FATTR4_WORD1_OWNER | FATTR4_WORD1_OWNER_GROUP \
362 | FATTR4_WORD1_TIME_ACCESS_SET | FATTR4_WORD1_TIME_MODIFY_SET)
363#define NFSD_WRITEABLE_ATTRS_WORD2 0
364
365#define NFSD_SUPPATTR_EXCLCREAT_WORD0 \
366 NFSD_WRITEABLE_ATTRS_WORD0
367/*
368 * we currently store the exclusive create verifier in the v_{a,m}time
369 * attributes so the client can't set these at create time using EXCLUSIVE4_1
370 */
371#define NFSD_SUPPATTR_EXCLCREAT_WORD1 \
372 (NFSD_WRITEABLE_ATTRS_WORD1 & \
373 ~(FATTR4_WORD1_TIME_ACCESS_SET | FATTR4_WORD1_TIME_MODIFY_SET))
374#define NFSD_SUPPATTR_EXCLCREAT_WORD2 \
375 NFSD_WRITEABLE_ATTRS_WORD2
376
377extern int nfsd4_is_junction(struct dentry *dentry);
378extern int register_cld_notifier(void);
379extern void unregister_cld_notifier(void);
380#else /* CONFIG_NFSD_V4 */
381static inline int nfsd4_is_junction(struct dentry *dentry)
382{
383 return 0;
384}
385
386#define register_cld_notifier() 0
387#define unregister_cld_notifier() do { } while(0)
388
389#endif /* CONFIG_NFSD_V4 */
390
391#endif /* LINUX_NFSD_NFSD_H */
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
61struct 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
68struct 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
83extern struct svc_program nfsd_program;
84extern const struct svc_version nfsd_version2, nfsd_version3, nfsd_version4;
85extern struct mutex nfsd_mutex;
86extern spinlock_t nfsd_drc_lock;
87extern unsigned long nfsd_drc_max_mem;
88extern unsigned long nfsd_drc_mem_used;
89
90extern const struct seq_operations nfs_exports_op;
91
92/*
93 * Common void argument and result helpers
94 */
95struct nfsd_voidargs { };
96struct nfsd_voidres { };
97bool nfssvc_decode_voidarg(struct svc_rqst *rqstp,
98 struct xdr_stream *xdr);
99bool nfssvc_encode_voidres(struct svc_rqst *rqstp,
100 struct xdr_stream *xdr);
101
102/*
103 * Function prototypes.
104 */
105int nfsd_svc(int nrservs, struct net *net, const struct cred *cred);
106int nfsd_dispatch(struct svc_rqst *rqstp);
107
108int nfsd_nrthreads(struct net *);
109int nfsd_nrpools(struct net *);
110int nfsd_get_nrthreads(int n, int *, struct net *);
111int nfsd_set_nrthreads(int n, int *, struct net *);
112int nfsd_pool_stats_open(struct inode *, struct file *);
113int nfsd_pool_stats_release(struct inode *, struct file *);
114void nfsd_shutdown_threads(struct net *net);
115
116bool i_am_nfsd(void);
117
118struct nfsdfs_client {
119 struct kref cl_ref;
120 void (*cl_release)(struct kref *kref);
121};
122
123struct nfsdfs_client *get_nfsdfs_client(struct inode *);
124struct dentry *nfsd_client_mkdir(struct nfsd_net *nn,
125 struct nfsdfs_client *ncl, u32 id,
126 const struct tree_descr *,
127 struct dentry **fdentries);
128void nfsd_client_rmdir(struct dentry *dentry);
129
130
131#if defined(CONFIG_NFSD_V2_ACL) || defined(CONFIG_NFSD_V3_ACL)
132#ifdef CONFIG_NFSD_V2_ACL
133extern const struct svc_version nfsd_acl_version2;
134#else
135#define nfsd_acl_version2 NULL
136#endif
137#ifdef CONFIG_NFSD_V3_ACL
138extern const struct svc_version nfsd_acl_version3;
139#else
140#define nfsd_acl_version3 NULL
141#endif
142#endif
143
144struct nfsd_net;
145
146enum vers_op {NFSD_SET, NFSD_CLEAR, NFSD_TEST, NFSD_AVAIL };
147int nfsd_vers(struct nfsd_net *nn, int vers, enum vers_op change);
148int nfsd_minorversion(struct nfsd_net *nn, u32 minorversion, enum vers_op change);
149void nfsd_reset_versions(struct nfsd_net *nn);
150int nfsd_create_serv(struct net *net);
151void nfsd_destroy_serv(struct net *net);
152
153extern int nfsd_max_blksize;
154
155static inline int nfsd_v4client(struct svc_rqst *rq)
156{
157 return rq->rq_prog == NFS_PROGRAM && rq->rq_vers == 4;
158}
159static inline struct user_namespace *
160nfsd_user_namespace(const struct svc_rqst *rqstp)
161{
162 const struct cred *cred = rqstp->rq_xprt->xpt_cred;
163 return cred ? cred->user_ns : &init_user_ns;
164}
165
166/*
167 * NFSv4 State
168 */
169#ifdef CONFIG_NFSD_V4
170extern unsigned long max_delegations;
171int nfsd4_init_slabs(void);
172void nfsd4_free_slabs(void);
173int nfs4_state_start(void);
174int nfs4_state_start_net(struct net *net);
175void nfs4_state_shutdown(void);
176void nfs4_state_shutdown_net(struct net *net);
177int nfs4_reset_recoverydir(char *recdir);
178char * nfs4_recoverydir(void);
179bool nfsd4_spo_must_allow(struct svc_rqst *rqstp);
180int nfsd4_create_laundry_wq(void);
181void nfsd4_destroy_laundry_wq(void);
182bool nfsd_wait_for_delegreturn(struct svc_rqst *rqstp, struct inode *inode);
183#else
184static inline int nfsd4_init_slabs(void) { return 0; }
185static inline void nfsd4_free_slabs(void) { }
186static inline int nfs4_state_start(void) { return 0; }
187static inline int nfs4_state_start_net(struct net *net) { return 0; }
188static inline void nfs4_state_shutdown(void) { }
189static inline void nfs4_state_shutdown_net(struct net *net) { }
190static inline int nfs4_reset_recoverydir(char *recdir) { return 0; }
191static inline char * nfs4_recoverydir(void) {return NULL; }
192static inline bool nfsd4_spo_must_allow(struct svc_rqst *rqstp)
193{
194 return false;
195}
196static inline int nfsd4_create_laundry_wq(void) { return 0; };
197static inline void nfsd4_destroy_laundry_wq(void) {};
198static inline bool nfsd_wait_for_delegreturn(struct svc_rqst *rqstp,
199 struct inode *inode)
200{
201 return false;
202}
203#endif
204
205/*
206 * lockd binding
207 */
208void nfsd_lockd_init(void);
209void nfsd_lockd_shutdown(void);
210
211
212/*
213 * These macros provide pre-xdr'ed values for faster operation.
214 */
215#define nfs_ok cpu_to_be32(NFS_OK)
216#define nfserr_perm cpu_to_be32(NFSERR_PERM)
217#define nfserr_noent cpu_to_be32(NFSERR_NOENT)
218#define nfserr_io cpu_to_be32(NFSERR_IO)
219#define nfserr_nxio cpu_to_be32(NFSERR_NXIO)
220#define nfserr_eagain cpu_to_be32(NFSERR_EAGAIN)
221#define nfserr_acces cpu_to_be32(NFSERR_ACCES)
222#define nfserr_exist cpu_to_be32(NFSERR_EXIST)
223#define nfserr_xdev cpu_to_be32(NFSERR_XDEV)
224#define nfserr_nodev cpu_to_be32(NFSERR_NODEV)
225#define nfserr_notdir cpu_to_be32(NFSERR_NOTDIR)
226#define nfserr_isdir cpu_to_be32(NFSERR_ISDIR)
227#define nfserr_inval cpu_to_be32(NFSERR_INVAL)
228#define nfserr_fbig cpu_to_be32(NFSERR_FBIG)
229#define nfserr_nospc cpu_to_be32(NFSERR_NOSPC)
230#define nfserr_rofs cpu_to_be32(NFSERR_ROFS)
231#define nfserr_mlink cpu_to_be32(NFSERR_MLINK)
232#define nfserr_opnotsupp cpu_to_be32(NFSERR_OPNOTSUPP)
233#define nfserr_nametoolong cpu_to_be32(NFSERR_NAMETOOLONG)
234#define nfserr_notempty cpu_to_be32(NFSERR_NOTEMPTY)
235#define nfserr_dquot cpu_to_be32(NFSERR_DQUOT)
236#define nfserr_stale cpu_to_be32(NFSERR_STALE)
237#define nfserr_remote cpu_to_be32(NFSERR_REMOTE)
238#define nfserr_wflush cpu_to_be32(NFSERR_WFLUSH)
239#define nfserr_badhandle cpu_to_be32(NFSERR_BADHANDLE)
240#define nfserr_notsync cpu_to_be32(NFSERR_NOT_SYNC)
241#define nfserr_badcookie cpu_to_be32(NFSERR_BAD_COOKIE)
242#define nfserr_notsupp cpu_to_be32(NFSERR_NOTSUPP)
243#define nfserr_toosmall cpu_to_be32(NFSERR_TOOSMALL)
244#define nfserr_serverfault cpu_to_be32(NFSERR_SERVERFAULT)
245#define nfserr_badtype cpu_to_be32(NFSERR_BADTYPE)
246#define nfserr_jukebox cpu_to_be32(NFSERR_JUKEBOX)
247#define nfserr_denied cpu_to_be32(NFSERR_DENIED)
248#define nfserr_deadlock cpu_to_be32(NFSERR_DEADLOCK)
249#define nfserr_expired cpu_to_be32(NFSERR_EXPIRED)
250#define nfserr_bad_cookie cpu_to_be32(NFSERR_BAD_COOKIE)
251#define nfserr_same cpu_to_be32(NFSERR_SAME)
252#define nfserr_clid_inuse cpu_to_be32(NFSERR_CLID_INUSE)
253#define nfserr_stale_clientid cpu_to_be32(NFSERR_STALE_CLIENTID)
254#define nfserr_resource cpu_to_be32(NFSERR_RESOURCE)
255#define nfserr_moved cpu_to_be32(NFSERR_MOVED)
256#define nfserr_nofilehandle cpu_to_be32(NFSERR_NOFILEHANDLE)
257#define nfserr_minor_vers_mismatch cpu_to_be32(NFSERR_MINOR_VERS_MISMATCH)
258#define nfserr_share_denied cpu_to_be32(NFSERR_SHARE_DENIED)
259#define nfserr_stale_stateid cpu_to_be32(NFSERR_STALE_STATEID)
260#define nfserr_old_stateid cpu_to_be32(NFSERR_OLD_STATEID)
261#define nfserr_bad_stateid cpu_to_be32(NFSERR_BAD_STATEID)
262#define nfserr_bad_seqid cpu_to_be32(NFSERR_BAD_SEQID)
263#define nfserr_symlink cpu_to_be32(NFSERR_SYMLINK)
264#define nfserr_not_same cpu_to_be32(NFSERR_NOT_SAME)
265#define nfserr_lock_range cpu_to_be32(NFSERR_LOCK_RANGE)
266#define nfserr_restorefh cpu_to_be32(NFSERR_RESTOREFH)
267#define nfserr_attrnotsupp cpu_to_be32(NFSERR_ATTRNOTSUPP)
268#define nfserr_bad_xdr cpu_to_be32(NFSERR_BAD_XDR)
269#define nfserr_openmode cpu_to_be32(NFSERR_OPENMODE)
270#define nfserr_badowner cpu_to_be32(NFSERR_BADOWNER)
271#define nfserr_locks_held cpu_to_be32(NFSERR_LOCKS_HELD)
272#define nfserr_op_illegal cpu_to_be32(NFSERR_OP_ILLEGAL)
273#define nfserr_grace cpu_to_be32(NFSERR_GRACE)
274#define nfserr_no_grace cpu_to_be32(NFSERR_NO_GRACE)
275#define nfserr_reclaim_bad cpu_to_be32(NFSERR_RECLAIM_BAD)
276#define nfserr_badname cpu_to_be32(NFSERR_BADNAME)
277#define nfserr_cb_path_down cpu_to_be32(NFSERR_CB_PATH_DOWN)
278#define nfserr_locked cpu_to_be32(NFSERR_LOCKED)
279#define nfserr_wrongsec cpu_to_be32(NFSERR_WRONGSEC)
280#define nfserr_badiomode cpu_to_be32(NFS4ERR_BADIOMODE)
281#define nfserr_badlayout cpu_to_be32(NFS4ERR_BADLAYOUT)
282#define nfserr_bad_session_digest cpu_to_be32(NFS4ERR_BAD_SESSION_DIGEST)
283#define nfserr_badsession cpu_to_be32(NFS4ERR_BADSESSION)
284#define nfserr_badslot cpu_to_be32(NFS4ERR_BADSLOT)
285#define nfserr_complete_already cpu_to_be32(NFS4ERR_COMPLETE_ALREADY)
286#define nfserr_conn_not_bound_to_session cpu_to_be32(NFS4ERR_CONN_NOT_BOUND_TO_SESSION)
287#define nfserr_deleg_already_wanted cpu_to_be32(NFS4ERR_DELEG_ALREADY_WANTED)
288#define nfserr_back_chan_busy cpu_to_be32(NFS4ERR_BACK_CHAN_BUSY)
289#define nfserr_layouttrylater cpu_to_be32(NFS4ERR_LAYOUTTRYLATER)
290#define nfserr_layoutunavailable cpu_to_be32(NFS4ERR_LAYOUTUNAVAILABLE)
291#define nfserr_nomatching_layout cpu_to_be32(NFS4ERR_NOMATCHING_LAYOUT)
292#define nfserr_recallconflict cpu_to_be32(NFS4ERR_RECALLCONFLICT)
293#define nfserr_unknown_layouttype cpu_to_be32(NFS4ERR_UNKNOWN_LAYOUTTYPE)
294#define nfserr_seq_misordered cpu_to_be32(NFS4ERR_SEQ_MISORDERED)
295#define nfserr_sequence_pos cpu_to_be32(NFS4ERR_SEQUENCE_POS)
296#define nfserr_req_too_big cpu_to_be32(NFS4ERR_REQ_TOO_BIG)
297#define nfserr_rep_too_big cpu_to_be32(NFS4ERR_REP_TOO_BIG)
298#define nfserr_rep_too_big_to_cache cpu_to_be32(NFS4ERR_REP_TOO_BIG_TO_CACHE)
299#define nfserr_retry_uncached_rep cpu_to_be32(NFS4ERR_RETRY_UNCACHED_REP)
300#define nfserr_unsafe_compound cpu_to_be32(NFS4ERR_UNSAFE_COMPOUND)
301#define nfserr_too_many_ops cpu_to_be32(NFS4ERR_TOO_MANY_OPS)
302#define nfserr_op_not_in_session cpu_to_be32(NFS4ERR_OP_NOT_IN_SESSION)
303#define nfserr_hash_alg_unsupp cpu_to_be32(NFS4ERR_HASH_ALG_UNSUPP)
304#define nfserr_clientid_busy cpu_to_be32(NFS4ERR_CLIENTID_BUSY)
305#define nfserr_pnfs_io_hole cpu_to_be32(NFS4ERR_PNFS_IO_HOLE)
306#define nfserr_seq_false_retry cpu_to_be32(NFS4ERR_SEQ_FALSE_RETRY)
307#define nfserr_bad_high_slot cpu_to_be32(NFS4ERR_BAD_HIGH_SLOT)
308#define nfserr_deadsession cpu_to_be32(NFS4ERR_DEADSESSION)
309#define nfserr_encr_alg_unsupp cpu_to_be32(NFS4ERR_ENCR_ALG_UNSUPP)
310#define nfserr_pnfs_no_layout cpu_to_be32(NFS4ERR_PNFS_NO_LAYOUT)
311#define nfserr_not_only_op cpu_to_be32(NFS4ERR_NOT_ONLY_OP)
312#define nfserr_wrong_cred cpu_to_be32(NFS4ERR_WRONG_CRED)
313#define nfserr_wrong_type cpu_to_be32(NFS4ERR_WRONG_TYPE)
314#define nfserr_dirdeleg_unavail cpu_to_be32(NFS4ERR_DIRDELEG_UNAVAIL)
315#define nfserr_reject_deleg cpu_to_be32(NFS4ERR_REJECT_DELEG)
316#define nfserr_returnconflict cpu_to_be32(NFS4ERR_RETURNCONFLICT)
317#define nfserr_deleg_revoked cpu_to_be32(NFS4ERR_DELEG_REVOKED)
318#define nfserr_partner_notsupp cpu_to_be32(NFS4ERR_PARTNER_NOTSUPP)
319#define nfserr_partner_no_auth cpu_to_be32(NFS4ERR_PARTNER_NO_AUTH)
320#define nfserr_union_notsupp cpu_to_be32(NFS4ERR_UNION_NOTSUPP)
321#define nfserr_offload_denied cpu_to_be32(NFS4ERR_OFFLOAD_DENIED)
322#define nfserr_wrong_lfs cpu_to_be32(NFS4ERR_WRONG_LFS)
323#define nfserr_badlabel cpu_to_be32(NFS4ERR_BADLABEL)
324#define nfserr_file_open cpu_to_be32(NFS4ERR_FILE_OPEN)
325#define nfserr_xattr2big cpu_to_be32(NFS4ERR_XATTR2BIG)
326#define nfserr_noxattr cpu_to_be32(NFS4ERR_NOXATTR)
327
328/* error codes for internal use */
329/* if a request fails due to kmalloc failure, it gets dropped.
330 * Client should resend eventually
331 */
332#define nfserr_dropit cpu_to_be32(30000)
333/* end-of-file indicator in readdir */
334#define nfserr_eof cpu_to_be32(30001)
335/* replay detected */
336#define nfserr_replay_me cpu_to_be32(11001)
337/* nfs41 replay detected */
338#define nfserr_replay_cache cpu_to_be32(11002)
339
340/* Check for dir entries '.' and '..' */
341#define isdotent(n, l) (l < 3 && n[0] == '.' && (l == 1 || n[1] == '.'))
342
343#ifdef CONFIG_NFSD_V4
344
345/* before processing a COMPOUND operation, we have to check that there
346 * is enough space in the buffer for XDR encode to succeed. otherwise,
347 * we might process an operation with side effects, and be unable to
348 * tell the client that the operation succeeded.
349 *
350 * COMPOUND_SLACK_SPACE - this is the minimum bytes of buffer space
351 * needed to encode an "ordinary" _successful_ operation. (GETATTR,
352 * READ, READDIR, and READLINK have their own buffer checks.) if we
353 * fall below this level, we fail the next operation with NFS4ERR_RESOURCE.
354 *
355 * COMPOUND_ERR_SLACK_SPACE - this is the minimum bytes of buffer space
356 * needed to encode an operation which has failed with NFS4ERR_RESOURCE.
357 * care is taken to ensure that we never fall below this level for any
358 * reason.
359 */
360#define COMPOUND_SLACK_SPACE 140 /* OP_GETFH */
361#define COMPOUND_ERR_SLACK_SPACE 16 /* OP_SETATTR */
362
363#define NFSD_LAUNDROMAT_MINTIMEOUT 1 /* seconds */
364#define NFSD_COURTESY_CLIENT_TIMEOUT (24 * 60 * 60) /* seconds */
365#define NFSD_CLIENT_MAX_TRIM_PER_RUN 128
366#define NFS4_CLIENTS_PER_GB 1024
367#define NFSD_DELEGRETURN_TIMEOUT (HZ / 34) /* 30ms */
368
369/*
370 * The following attributes are currently not supported by the NFSv4 server:
371 * ARCHIVE (deprecated anyway)
372 * HIDDEN (unlikely to be supported any time soon)
373 * MIMETYPE (unlikely to be supported any time soon)
374 * QUOTA_* (will be supported in a forthcoming patch)
375 * SYSTEM (unlikely to be supported any time soon)
376 * TIME_BACKUP (unlikely to be supported any time soon)
377 * TIME_CREATE (unlikely to be supported any time soon)
378 */
379#define NFSD4_SUPPORTED_ATTRS_WORD0 \
380(FATTR4_WORD0_SUPPORTED_ATTRS | FATTR4_WORD0_TYPE | FATTR4_WORD0_FH_EXPIRE_TYPE \
381 | FATTR4_WORD0_CHANGE | FATTR4_WORD0_SIZE | FATTR4_WORD0_LINK_SUPPORT \
382 | FATTR4_WORD0_SYMLINK_SUPPORT | FATTR4_WORD0_NAMED_ATTR | FATTR4_WORD0_FSID \
383 | FATTR4_WORD0_UNIQUE_HANDLES | FATTR4_WORD0_LEASE_TIME | FATTR4_WORD0_RDATTR_ERROR \
384 | FATTR4_WORD0_ACLSUPPORT | FATTR4_WORD0_CANSETTIME | FATTR4_WORD0_CASE_INSENSITIVE \
385 | FATTR4_WORD0_CASE_PRESERVING | FATTR4_WORD0_CHOWN_RESTRICTED \
386 | FATTR4_WORD0_FILEHANDLE | FATTR4_WORD0_FILEID | FATTR4_WORD0_FILES_AVAIL \
387 | FATTR4_WORD0_FILES_FREE | FATTR4_WORD0_FILES_TOTAL | FATTR4_WORD0_FS_LOCATIONS | FATTR4_WORD0_HOMOGENEOUS \
388 | FATTR4_WORD0_MAXFILESIZE | FATTR4_WORD0_MAXLINK | FATTR4_WORD0_MAXNAME \
389 | FATTR4_WORD0_MAXREAD | FATTR4_WORD0_MAXWRITE | FATTR4_WORD0_ACL)
390
391#define NFSD4_SUPPORTED_ATTRS_WORD1 \
392(FATTR4_WORD1_MODE | FATTR4_WORD1_NO_TRUNC | FATTR4_WORD1_NUMLINKS \
393 | FATTR4_WORD1_OWNER | FATTR4_WORD1_OWNER_GROUP | FATTR4_WORD1_RAWDEV \
394 | FATTR4_WORD1_SPACE_AVAIL | FATTR4_WORD1_SPACE_FREE | FATTR4_WORD1_SPACE_TOTAL \
395 | FATTR4_WORD1_SPACE_USED | FATTR4_WORD1_TIME_ACCESS | FATTR4_WORD1_TIME_ACCESS_SET \
396 | FATTR4_WORD1_TIME_DELTA | FATTR4_WORD1_TIME_METADATA | FATTR4_WORD1_TIME_CREATE \
397 | FATTR4_WORD1_TIME_MODIFY | FATTR4_WORD1_TIME_MODIFY_SET | FATTR4_WORD1_MOUNTED_ON_FILEID)
398
399#define NFSD4_SUPPORTED_ATTRS_WORD2 0
400
401/* 4.1 */
402#ifdef CONFIG_NFSD_PNFS
403#define PNFSD_SUPPORTED_ATTRS_WORD1 FATTR4_WORD1_FS_LAYOUT_TYPES
404#define PNFSD_SUPPORTED_ATTRS_WORD2 \
405(FATTR4_WORD2_LAYOUT_BLKSIZE | FATTR4_WORD2_LAYOUT_TYPES)
406#else
407#define PNFSD_SUPPORTED_ATTRS_WORD1 0
408#define PNFSD_SUPPORTED_ATTRS_WORD2 0
409#endif /* CONFIG_NFSD_PNFS */
410
411#define NFSD4_1_SUPPORTED_ATTRS_WORD0 \
412 NFSD4_SUPPORTED_ATTRS_WORD0
413
414#define NFSD4_1_SUPPORTED_ATTRS_WORD1 \
415 (NFSD4_SUPPORTED_ATTRS_WORD1 | PNFSD_SUPPORTED_ATTRS_WORD1)
416
417#define NFSD4_1_SUPPORTED_ATTRS_WORD2 \
418 (NFSD4_SUPPORTED_ATTRS_WORD2 | PNFSD_SUPPORTED_ATTRS_WORD2 | \
419 FATTR4_WORD2_SUPPATTR_EXCLCREAT)
420
421/* 4.2 */
422#ifdef CONFIG_NFSD_V4_SECURITY_LABEL
423#define NFSD4_2_SECURITY_ATTRS FATTR4_WORD2_SECURITY_LABEL
424#else
425#define NFSD4_2_SECURITY_ATTRS 0
426#endif
427
428#define NFSD4_2_SUPPORTED_ATTRS_WORD2 \
429 (NFSD4_1_SUPPORTED_ATTRS_WORD2 | \
430 FATTR4_WORD2_MODE_UMASK | \
431 NFSD4_2_SECURITY_ATTRS | \
432 FATTR4_WORD2_XATTR_SUPPORT)
433
434extern const u32 nfsd_suppattrs[3][3];
435
436static inline __be32 nfsd4_set_netaddr(struct sockaddr *addr,
437 struct nfs42_netaddr *netaddr)
438{
439 struct sockaddr_in *sin = (struct sockaddr_in *)addr;
440 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)addr;
441 unsigned int port;
442 size_t ret_addr, ret_port;
443
444 switch (addr->sa_family) {
445 case AF_INET:
446 port = ntohs(sin->sin_port);
447 sprintf(netaddr->netid, "tcp");
448 netaddr->netid_len = 3;
449 break;
450 case AF_INET6:
451 port = ntohs(sin6->sin6_port);
452 sprintf(netaddr->netid, "tcp6");
453 netaddr->netid_len = 4;
454 break;
455 default:
456 return nfserr_inval;
457 }
458 ret_addr = rpc_ntop(addr, netaddr->addr, sizeof(netaddr->addr));
459 ret_port = snprintf(netaddr->addr + ret_addr,
460 RPCBIND_MAXUADDRLEN + 1 - ret_addr,
461 ".%u.%u", port >> 8, port & 0xff);
462 WARN_ON(ret_port >= RPCBIND_MAXUADDRLEN + 1 - ret_addr);
463 netaddr->addr_len = ret_addr + ret_port;
464 return 0;
465}
466
467static inline bool bmval_is_subset(const u32 *bm1, const u32 *bm2)
468{
469 return !((bm1[0] & ~bm2[0]) ||
470 (bm1[1] & ~bm2[1]) ||
471 (bm1[2] & ~bm2[2]));
472}
473
474static inline bool nfsd_attrs_supported(u32 minorversion, const u32 *bmval)
475{
476 return bmval_is_subset(bmval, nfsd_suppattrs[minorversion]);
477}
478
479/* These will return ERR_INVAL if specified in GETATTR or READDIR. */
480#define NFSD_WRITEONLY_ATTRS_WORD1 \
481 (FATTR4_WORD1_TIME_ACCESS_SET | FATTR4_WORD1_TIME_MODIFY_SET)
482
483/*
484 * These are the only attrs allowed in CREATE/OPEN/SETATTR. Don't add
485 * a writeable attribute here without also adding code to parse it to
486 * nfsd4_decode_fattr().
487 */
488#define NFSD_WRITEABLE_ATTRS_WORD0 \
489 (FATTR4_WORD0_SIZE | FATTR4_WORD0_ACL)
490#define NFSD_WRITEABLE_ATTRS_WORD1 \
491 (FATTR4_WORD1_MODE | FATTR4_WORD1_OWNER | FATTR4_WORD1_OWNER_GROUP \
492 | FATTR4_WORD1_TIME_ACCESS_SET | FATTR4_WORD1_TIME_CREATE \
493 | FATTR4_WORD1_TIME_MODIFY_SET)
494#ifdef CONFIG_NFSD_V4_SECURITY_LABEL
495#define MAYBE_FATTR4_WORD2_SECURITY_LABEL \
496 FATTR4_WORD2_SECURITY_LABEL
497#else
498#define MAYBE_FATTR4_WORD2_SECURITY_LABEL 0
499#endif
500#define NFSD_WRITEABLE_ATTRS_WORD2 \
501 (FATTR4_WORD2_MODE_UMASK \
502 | MAYBE_FATTR4_WORD2_SECURITY_LABEL)
503
504#define NFSD_SUPPATTR_EXCLCREAT_WORD0 \
505 NFSD_WRITEABLE_ATTRS_WORD0
506/*
507 * we currently store the exclusive create verifier in the v_{a,m}time
508 * attributes so the client can't set these at create time using EXCLUSIVE4_1
509 */
510#define NFSD_SUPPATTR_EXCLCREAT_WORD1 \
511 (NFSD_WRITEABLE_ATTRS_WORD1 & \
512 ~(FATTR4_WORD1_TIME_ACCESS_SET | FATTR4_WORD1_TIME_MODIFY_SET))
513#define NFSD_SUPPATTR_EXCLCREAT_WORD2 \
514 NFSD_WRITEABLE_ATTRS_WORD2
515
516extern int nfsd4_is_junction(struct dentry *dentry);
517extern int register_cld_notifier(void);
518extern void unregister_cld_notifier(void);
519#ifdef CONFIG_NFSD_V4_2_INTER_SSC
520extern void nfsd4_ssc_init_umount_work(struct nfsd_net *nn);
521#endif
522
523extern void nfsd4_init_leases_net(struct nfsd_net *nn);
524
525#else /* CONFIG_NFSD_V4 */
526static inline int nfsd4_is_junction(struct dentry *dentry)
527{
528 return 0;
529}
530
531static inline void nfsd4_init_leases_net(struct nfsd_net *nn) { };
532
533#define register_cld_notifier() 0
534#define unregister_cld_notifier() do { } while(0)
535
536#endif /* CONFIG_NFSD_V4 */
537
538#endif /* LINUX_NFSD_NFSD_H */