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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/svc.h>
19#include <linux/sunrpc/msg_prot.h>
20
21#include <uapi/linux/nfsd/debug.h>
22
23#include "stats.h"
24#include "export.h"
25
26#undef ifdebug
27#ifdef CONFIG_SUNRPC_DEBUG
28# define ifdebug(flag) if (nfsd_debug & NFSDDBG_##flag)
29#else
30# define ifdebug(flag) if (0)
31#endif
32
33/*
34 * nfsd version
35 */
36#define NFSD_SUPPORTED_MINOR_VERSION 2
37/*
38 * Maximum blocksizes supported by daemon under various circumstances.
39 */
40#define NFSSVC_MAXBLKSIZE RPCSVC_MAXPAYLOAD
41/* NFSv2 is limited by the protocol specification, see RFC 1094 */
42#define NFSSVC_MAXBLKSIZE_V2 (8*1024)
43
44
45/*
46 * Largest number of bytes we need to allocate for an NFS
47 * call or reply. Used to control buffer sizes. We use
48 * the length of v3 WRITE, READDIR and READDIR replies
49 * which are an RPC header, up to 26 XDR units of reply
50 * data, and some page data.
51 *
52 * Note that accuracy here doesn't matter too much as the
53 * size is rounded up to a page size when allocating space.
54 */
55#define NFSD_BUFSIZE ((RPC_MAX_HEADER_WITH_AUTH+26)*XDR_UNIT + NFSSVC_MAXBLKSIZE)
56
57struct readdir_cd {
58 __be32 err; /* 0, nfserr, or nfserr_eof */
59};
60
61
62extern struct svc_program nfsd_program;
63extern struct svc_version nfsd_version2, nfsd_version3,
64 nfsd_version4;
65extern struct mutex nfsd_mutex;
66extern spinlock_t nfsd_drc_lock;
67extern unsigned long nfsd_drc_max_mem;
68extern unsigned long nfsd_drc_mem_used;
69
70extern const struct seq_operations nfs_exports_op;
71
72/*
73 * Function prototypes.
74 */
75int nfsd_svc(int nrservs, struct net *net);
76int nfsd_dispatch(struct svc_rqst *rqstp, __be32 *statp);
77
78int nfsd_nrthreads(struct net *);
79int nfsd_nrpools(struct net *);
80int nfsd_get_nrthreads(int n, int *, struct net *);
81int nfsd_set_nrthreads(int n, int *, struct net *);
82int nfsd_pool_stats_open(struct inode *, struct file *);
83int nfsd_pool_stats_release(struct inode *, struct file *);
84
85void nfsd_destroy(struct net *net);
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(struct net *net);
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 long max_delegations;
118int nfsd4_init_slabs(void);
119void nfsd4_free_slabs(void);
120int nfs4_state_start(void);
121int nfs4_state_start_net(struct net *net);
122void nfs4_state_shutdown(void);
123void nfs4_state_shutdown_net(struct net *net);
124void nfs4_reset_lease(time_t leasetime);
125int nfs4_reset_recoverydir(char *recdir);
126char * nfs4_recoverydir(void);
127bool nfsd4_spo_must_allow(struct svc_rqst *rqstp);
128#else
129static inline int nfsd4_init_slabs(void) { return 0; }
130static inline void nfsd4_free_slabs(void) { }
131static inline int nfs4_state_start(void) { return 0; }
132static inline int nfs4_state_start_net(struct net *net) { return 0; }
133static inline void nfs4_state_shutdown(void) { }
134static inline void nfs4_state_shutdown_net(struct net *net) { }
135static inline void nfs4_reset_lease(time_t leasetime) { }
136static inline int nfs4_reset_recoverydir(char *recdir) { return 0; }
137static inline char * nfs4_recoverydir(void) {return NULL; }
138static inline bool nfsd4_spo_must_allow(struct svc_rqst *rqstp)
139{
140 return false;
141}
142#endif
143
144/*
145 * lockd binding
146 */
147void nfsd_lockd_init(void);
148void nfsd_lockd_shutdown(void);
149
150
151/*
152 * These macros provide pre-xdr'ed values for faster operation.
153 */
154#define nfs_ok cpu_to_be32(NFS_OK)
155#define nfserr_perm cpu_to_be32(NFSERR_PERM)
156#define nfserr_noent cpu_to_be32(NFSERR_NOENT)
157#define nfserr_io cpu_to_be32(NFSERR_IO)
158#define nfserr_nxio cpu_to_be32(NFSERR_NXIO)
159#define nfserr_eagain cpu_to_be32(NFSERR_EAGAIN)
160#define nfserr_acces cpu_to_be32(NFSERR_ACCES)
161#define nfserr_exist cpu_to_be32(NFSERR_EXIST)
162#define nfserr_xdev cpu_to_be32(NFSERR_XDEV)
163#define nfserr_nodev cpu_to_be32(NFSERR_NODEV)
164#define nfserr_notdir cpu_to_be32(NFSERR_NOTDIR)
165#define nfserr_isdir cpu_to_be32(NFSERR_ISDIR)
166#define nfserr_inval cpu_to_be32(NFSERR_INVAL)
167#define nfserr_fbig cpu_to_be32(NFSERR_FBIG)
168#define nfserr_nospc cpu_to_be32(NFSERR_NOSPC)
169#define nfserr_rofs cpu_to_be32(NFSERR_ROFS)
170#define nfserr_mlink cpu_to_be32(NFSERR_MLINK)
171#define nfserr_opnotsupp cpu_to_be32(NFSERR_OPNOTSUPP)
172#define nfserr_nametoolong cpu_to_be32(NFSERR_NAMETOOLONG)
173#define nfserr_notempty cpu_to_be32(NFSERR_NOTEMPTY)
174#define nfserr_dquot cpu_to_be32(NFSERR_DQUOT)
175#define nfserr_stale cpu_to_be32(NFSERR_STALE)
176#define nfserr_remote cpu_to_be32(NFSERR_REMOTE)
177#define nfserr_wflush cpu_to_be32(NFSERR_WFLUSH)
178#define nfserr_badhandle cpu_to_be32(NFSERR_BADHANDLE)
179#define nfserr_notsync cpu_to_be32(NFSERR_NOT_SYNC)
180#define nfserr_badcookie cpu_to_be32(NFSERR_BAD_COOKIE)
181#define nfserr_notsupp cpu_to_be32(NFSERR_NOTSUPP)
182#define nfserr_toosmall cpu_to_be32(NFSERR_TOOSMALL)
183#define nfserr_serverfault cpu_to_be32(NFSERR_SERVERFAULT)
184#define nfserr_badtype cpu_to_be32(NFSERR_BADTYPE)
185#define nfserr_jukebox cpu_to_be32(NFSERR_JUKEBOX)
186#define nfserr_denied cpu_to_be32(NFSERR_DENIED)
187#define nfserr_deadlock cpu_to_be32(NFSERR_DEADLOCK)
188#define nfserr_expired cpu_to_be32(NFSERR_EXPIRED)
189#define nfserr_bad_cookie cpu_to_be32(NFSERR_BAD_COOKIE)
190#define nfserr_same cpu_to_be32(NFSERR_SAME)
191#define nfserr_clid_inuse cpu_to_be32(NFSERR_CLID_INUSE)
192#define nfserr_stale_clientid cpu_to_be32(NFSERR_STALE_CLIENTID)
193#define nfserr_resource cpu_to_be32(NFSERR_RESOURCE)
194#define nfserr_moved cpu_to_be32(NFSERR_MOVED)
195#define nfserr_nofilehandle cpu_to_be32(NFSERR_NOFILEHANDLE)
196#define nfserr_minor_vers_mismatch cpu_to_be32(NFSERR_MINOR_VERS_MISMATCH)
197#define nfserr_share_denied cpu_to_be32(NFSERR_SHARE_DENIED)
198#define nfserr_stale_stateid cpu_to_be32(NFSERR_STALE_STATEID)
199#define nfserr_old_stateid cpu_to_be32(NFSERR_OLD_STATEID)
200#define nfserr_bad_stateid cpu_to_be32(NFSERR_BAD_STATEID)
201#define nfserr_bad_seqid cpu_to_be32(NFSERR_BAD_SEQID)
202#define nfserr_symlink cpu_to_be32(NFSERR_SYMLINK)
203#define nfserr_not_same cpu_to_be32(NFSERR_NOT_SAME)
204#define nfserr_lock_range cpu_to_be32(NFSERR_LOCK_RANGE)
205#define nfserr_restorefh cpu_to_be32(NFSERR_RESTOREFH)
206#define nfserr_attrnotsupp cpu_to_be32(NFSERR_ATTRNOTSUPP)
207#define nfserr_bad_xdr cpu_to_be32(NFSERR_BAD_XDR)
208#define nfserr_openmode cpu_to_be32(NFSERR_OPENMODE)
209#define nfserr_badowner cpu_to_be32(NFSERR_BADOWNER)
210#define nfserr_locks_held cpu_to_be32(NFSERR_LOCKS_HELD)
211#define nfserr_op_illegal cpu_to_be32(NFSERR_OP_ILLEGAL)
212#define nfserr_grace cpu_to_be32(NFSERR_GRACE)
213#define nfserr_no_grace cpu_to_be32(NFSERR_NO_GRACE)
214#define nfserr_reclaim_bad cpu_to_be32(NFSERR_RECLAIM_BAD)
215#define nfserr_badname cpu_to_be32(NFSERR_BADNAME)
216#define nfserr_cb_path_down cpu_to_be32(NFSERR_CB_PATH_DOWN)
217#define nfserr_locked cpu_to_be32(NFSERR_LOCKED)
218#define nfserr_wrongsec cpu_to_be32(NFSERR_WRONGSEC)
219#define nfserr_badiomode cpu_to_be32(NFS4ERR_BADIOMODE)
220#define nfserr_badlayout cpu_to_be32(NFS4ERR_BADLAYOUT)
221#define nfserr_bad_session_digest cpu_to_be32(NFS4ERR_BAD_SESSION_DIGEST)
222#define nfserr_badsession cpu_to_be32(NFS4ERR_BADSESSION)
223#define nfserr_badslot cpu_to_be32(NFS4ERR_BADSLOT)
224#define nfserr_complete_already cpu_to_be32(NFS4ERR_COMPLETE_ALREADY)
225#define nfserr_conn_not_bound_to_session cpu_to_be32(NFS4ERR_CONN_NOT_BOUND_TO_SESSION)
226#define nfserr_deleg_already_wanted cpu_to_be32(NFS4ERR_DELEG_ALREADY_WANTED)
227#define nfserr_back_chan_busy cpu_to_be32(NFS4ERR_BACK_CHAN_BUSY)
228#define nfserr_layouttrylater cpu_to_be32(NFS4ERR_LAYOUTTRYLATER)
229#define nfserr_layoutunavailable cpu_to_be32(NFS4ERR_LAYOUTUNAVAILABLE)
230#define nfserr_nomatching_layout cpu_to_be32(NFS4ERR_NOMATCHING_LAYOUT)
231#define nfserr_recallconflict cpu_to_be32(NFS4ERR_RECALLCONFLICT)
232#define nfserr_unknown_layouttype cpu_to_be32(NFS4ERR_UNKNOWN_LAYOUTTYPE)
233#define nfserr_seq_misordered cpu_to_be32(NFS4ERR_SEQ_MISORDERED)
234#define nfserr_sequence_pos cpu_to_be32(NFS4ERR_SEQUENCE_POS)
235#define nfserr_req_too_big cpu_to_be32(NFS4ERR_REQ_TOO_BIG)
236#define nfserr_rep_too_big cpu_to_be32(NFS4ERR_REP_TOO_BIG)
237#define nfserr_rep_too_big_to_cache cpu_to_be32(NFS4ERR_REP_TOO_BIG_TO_CACHE)
238#define nfserr_retry_uncached_rep cpu_to_be32(NFS4ERR_RETRY_UNCACHED_REP)
239#define nfserr_unsafe_compound cpu_to_be32(NFS4ERR_UNSAFE_COMPOUND)
240#define nfserr_too_many_ops cpu_to_be32(NFS4ERR_TOO_MANY_OPS)
241#define nfserr_op_not_in_session cpu_to_be32(NFS4ERR_OP_NOT_IN_SESSION)
242#define nfserr_hash_alg_unsupp cpu_to_be32(NFS4ERR_HASH_ALG_UNSUPP)
243#define nfserr_clientid_busy cpu_to_be32(NFS4ERR_CLIENTID_BUSY)
244#define nfserr_pnfs_io_hole cpu_to_be32(NFS4ERR_PNFS_IO_HOLE)
245#define nfserr_seq_false_retry cpu_to_be32(NFS4ERR_SEQ_FALSE_RETRY)
246#define nfserr_bad_high_slot cpu_to_be32(NFS4ERR_BAD_HIGH_SLOT)
247#define nfserr_deadsession cpu_to_be32(NFS4ERR_DEADSESSION)
248#define nfserr_encr_alg_unsupp cpu_to_be32(NFS4ERR_ENCR_ALG_UNSUPP)
249#define nfserr_pnfs_no_layout cpu_to_be32(NFS4ERR_PNFS_NO_LAYOUT)
250#define nfserr_not_only_op cpu_to_be32(NFS4ERR_NOT_ONLY_OP)
251#define nfserr_wrong_cred cpu_to_be32(NFS4ERR_WRONG_CRED)
252#define nfserr_wrong_type cpu_to_be32(NFS4ERR_WRONG_TYPE)
253#define nfserr_dirdeleg_unavail cpu_to_be32(NFS4ERR_DIRDELEG_UNAVAIL)
254#define nfserr_reject_deleg cpu_to_be32(NFS4ERR_REJECT_DELEG)
255#define nfserr_returnconflict cpu_to_be32(NFS4ERR_RETURNCONFLICT)
256#define nfserr_deleg_revoked cpu_to_be32(NFS4ERR_DELEG_REVOKED)
257#define nfserr_partner_notsupp cpu_to_be32(NFS4ERR_PARTNER_NOTSUPP)
258#define nfserr_partner_no_auth cpu_to_be32(NFS4ERR_PARTNER_NO_AUTH)
259#define nfserr_union_notsupp cpu_to_be32(NFS4ERR_UNION_NOTSUPP)
260#define nfserr_offload_denied cpu_to_be32(NFS4ERR_OFFLOAD_DENIED)
261#define nfserr_wrong_lfs cpu_to_be32(NFS4ERR_WRONG_LFS)
262#define nfserr_badlabel cpu_to_be32(NFS4ERR_BADLABEL)
263
264/* error codes for internal use */
265/* if a request fails due to kmalloc failure, it gets dropped.
266 * Client should resend eventually
267 */
268#define nfserr_dropit cpu_to_be32(30000)
269/* end-of-file indicator in readdir */
270#define nfserr_eof cpu_to_be32(30001)
271/* replay detected */
272#define nfserr_replay_me cpu_to_be32(11001)
273/* nfs41 replay detected */
274#define nfserr_replay_cache cpu_to_be32(11002)
275
276/* Check for dir entries '.' and '..' */
277#define isdotent(n, l) (l < 3 && n[0] == '.' && (l == 1 || n[1] == '.'))
278
279#ifdef CONFIG_NFSD_V4
280
281/* before processing a COMPOUND operation, we have to check that there
282 * is enough space in the buffer for XDR encode to succeed. otherwise,
283 * we might process an operation with side effects, and be unable to
284 * tell the client that the operation succeeded.
285 *
286 * COMPOUND_SLACK_SPACE - this is the minimum bytes of buffer space
287 * needed to encode an "ordinary" _successful_ operation. (GETATTR,
288 * READ, READDIR, and READLINK have their own buffer checks.) if we
289 * fall below this level, we fail the next operation with NFS4ERR_RESOURCE.
290 *
291 * COMPOUND_ERR_SLACK_SPACE - this is the minimum bytes of buffer space
292 * needed to encode an operation which has failed with NFS4ERR_RESOURCE.
293 * care is taken to ensure that we never fall below this level for any
294 * reason.
295 */
296#define COMPOUND_SLACK_SPACE 140 /* OP_GETFH */
297#define COMPOUND_ERR_SLACK_SPACE 16 /* OP_SETATTR */
298
299#define NFSD_LAUNDROMAT_MINTIMEOUT 1 /* seconds */
300
301/*
302 * The following attributes are currently not supported by the NFSv4 server:
303 * ARCHIVE (deprecated anyway)
304 * HIDDEN (unlikely to be supported any time soon)
305 * MIMETYPE (unlikely to be supported any time soon)
306 * QUOTA_* (will be supported in a forthcoming patch)
307 * SYSTEM (unlikely to be supported any time soon)
308 * TIME_BACKUP (unlikely to be supported any time soon)
309 * TIME_CREATE (unlikely to be supported any time soon)
310 */
311#define NFSD4_SUPPORTED_ATTRS_WORD0 \
312(FATTR4_WORD0_SUPPORTED_ATTRS | FATTR4_WORD0_TYPE | FATTR4_WORD0_FH_EXPIRE_TYPE \
313 | FATTR4_WORD0_CHANGE | FATTR4_WORD0_SIZE | FATTR4_WORD0_LINK_SUPPORT \
314 | FATTR4_WORD0_SYMLINK_SUPPORT | FATTR4_WORD0_NAMED_ATTR | FATTR4_WORD0_FSID \
315 | FATTR4_WORD0_UNIQUE_HANDLES | FATTR4_WORD0_LEASE_TIME | FATTR4_WORD0_RDATTR_ERROR \
316 | FATTR4_WORD0_ACLSUPPORT | FATTR4_WORD0_CANSETTIME | FATTR4_WORD0_CASE_INSENSITIVE \
317 | FATTR4_WORD0_CASE_PRESERVING | FATTR4_WORD0_CHOWN_RESTRICTED \
318 | FATTR4_WORD0_FILEHANDLE | FATTR4_WORD0_FILEID | FATTR4_WORD0_FILES_AVAIL \
319 | FATTR4_WORD0_FILES_FREE | FATTR4_WORD0_FILES_TOTAL | FATTR4_WORD0_FS_LOCATIONS | FATTR4_WORD0_HOMOGENEOUS \
320 | FATTR4_WORD0_MAXFILESIZE | FATTR4_WORD0_MAXLINK | FATTR4_WORD0_MAXNAME \
321 | FATTR4_WORD0_MAXREAD | FATTR4_WORD0_MAXWRITE | FATTR4_WORD0_ACL)
322
323#define NFSD4_SUPPORTED_ATTRS_WORD1 \
324(FATTR4_WORD1_MODE | FATTR4_WORD1_NO_TRUNC | FATTR4_WORD1_NUMLINKS \
325 | FATTR4_WORD1_OWNER | FATTR4_WORD1_OWNER_GROUP | FATTR4_WORD1_RAWDEV \
326 | FATTR4_WORD1_SPACE_AVAIL | FATTR4_WORD1_SPACE_FREE | FATTR4_WORD1_SPACE_TOTAL \
327 | FATTR4_WORD1_SPACE_USED | FATTR4_WORD1_TIME_ACCESS | FATTR4_WORD1_TIME_ACCESS_SET \
328 | FATTR4_WORD1_TIME_DELTA | FATTR4_WORD1_TIME_METADATA \
329 | FATTR4_WORD1_TIME_MODIFY | FATTR4_WORD1_TIME_MODIFY_SET | FATTR4_WORD1_MOUNTED_ON_FILEID)
330
331#define NFSD4_SUPPORTED_ATTRS_WORD2 0
332
333/* 4.1 */
334#ifdef CONFIG_NFSD_PNFS
335#define PNFSD_SUPPORTED_ATTRS_WORD1 FATTR4_WORD1_FS_LAYOUT_TYPES
336#define PNFSD_SUPPORTED_ATTRS_WORD2 \
337(FATTR4_WORD2_LAYOUT_BLKSIZE | FATTR4_WORD2_LAYOUT_TYPES)
338#else
339#define PNFSD_SUPPORTED_ATTRS_WORD1 0
340#define PNFSD_SUPPORTED_ATTRS_WORD2 0
341#endif /* CONFIG_NFSD_PNFS */
342
343#define NFSD4_1_SUPPORTED_ATTRS_WORD0 \
344 NFSD4_SUPPORTED_ATTRS_WORD0
345
346#define NFSD4_1_SUPPORTED_ATTRS_WORD1 \
347 (NFSD4_SUPPORTED_ATTRS_WORD1 | PNFSD_SUPPORTED_ATTRS_WORD1)
348
349#define NFSD4_1_SUPPORTED_ATTRS_WORD2 \
350 (NFSD4_SUPPORTED_ATTRS_WORD2 | PNFSD_SUPPORTED_ATTRS_WORD2 | \
351 FATTR4_WORD2_SUPPATTR_EXCLCREAT)
352
353/* 4.2 */
354#ifdef CONFIG_NFSD_V4_SECURITY_LABEL
355#define NFSD4_2_SECURITY_ATTRS FATTR4_WORD2_SECURITY_LABEL
356#else
357#define NFSD4_2_SECURITY_ATTRS 0
358#endif
359
360#define NFSD4_2_SUPPORTED_ATTRS_WORD2 \
361 (NFSD4_1_SUPPORTED_ATTRS_WORD2 | \
362 FATTR4_WORD2_MODE_UMASK | \
363 NFSD4_2_SECURITY_ATTRS)
364
365extern u32 nfsd_suppattrs[3][3];
366
367static inline bool bmval_is_subset(u32 *bm1, u32 *bm2)
368{
369 return !((bm1[0] & ~bm2[0]) ||
370 (bm1[1] & ~bm2[1]) ||
371 (bm1[2] & ~bm2[2]));
372}
373
374static inline bool nfsd_attrs_supported(u32 minorversion, u32 *bmval)
375{
376 return bmval_is_subset(bmval, nfsd_suppattrs[minorversion]);
377}
378
379/* These will return ERR_INVAL if specified in GETATTR or READDIR. */
380#define NFSD_WRITEONLY_ATTRS_WORD1 \
381 (FATTR4_WORD1_TIME_ACCESS_SET | FATTR4_WORD1_TIME_MODIFY_SET)
382
383/*
384 * These are the only attrs allowed in CREATE/OPEN/SETATTR. Don't add
385 * a writeable attribute here without also adding code to parse it to
386 * nfsd4_decode_fattr().
387 */
388#define NFSD_WRITEABLE_ATTRS_WORD0 \
389 (FATTR4_WORD0_SIZE | FATTR4_WORD0_ACL)
390#define NFSD_WRITEABLE_ATTRS_WORD1 \
391 (FATTR4_WORD1_MODE | FATTR4_WORD1_OWNER | FATTR4_WORD1_OWNER_GROUP \
392 | FATTR4_WORD1_TIME_ACCESS_SET | FATTR4_WORD1_TIME_MODIFY_SET)
393#ifdef CONFIG_NFSD_V4_SECURITY_LABEL
394#define MAYBE_FATTR4_WORD2_SECURITY_LABEL \
395 FATTR4_WORD2_SECURITY_LABEL
396#else
397#define MAYBE_FATTR4_WORD2_SECURITY_LABEL 0
398#endif
399#define NFSD_WRITEABLE_ATTRS_WORD2 \
400 (FATTR4_WORD2_MODE_UMASK \
401 | MAYBE_FATTR4_WORD2_SECURITY_LABEL)
402
403#define NFSD_SUPPATTR_EXCLCREAT_WORD0 \
404 NFSD_WRITEABLE_ATTRS_WORD0
405/*
406 * we currently store the exclusive create verifier in the v_{a,m}time
407 * attributes so the client can't set these at create time using EXCLUSIVE4_1
408 */
409#define NFSD_SUPPATTR_EXCLCREAT_WORD1 \
410 (NFSD_WRITEABLE_ATTRS_WORD1 & \
411 ~(FATTR4_WORD1_TIME_ACCESS_SET | FATTR4_WORD1_TIME_MODIFY_SET))
412#define NFSD_SUPPATTR_EXCLCREAT_WORD2 \
413 NFSD_WRITEABLE_ATTRS_WORD2
414
415extern int nfsd4_is_junction(struct dentry *dentry);
416extern int register_cld_notifier(void);
417extern void unregister_cld_notifier(void);
418#else /* CONFIG_NFSD_V4 */
419static inline int nfsd4_is_junction(struct dentry *dentry)
420{
421 return 0;
422}
423
424#define register_cld_notifier() 0
425#define unregister_cld_notifier() do { } while(0)
426
427#endif /* CONFIG_NFSD_V4 */
428
429#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 "stats.h"
28#include "export.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
66extern struct svc_program nfsd_program;
67extern const struct svc_version nfsd_version2, nfsd_version3,
68 nfsd_version4;
69extern struct mutex nfsd_mutex;
70extern spinlock_t nfsd_drc_lock;
71extern unsigned long nfsd_drc_max_mem;
72extern unsigned long nfsd_drc_mem_used;
73
74extern const struct seq_operations nfs_exports_op;
75
76/*
77 * Function prototypes.
78 */
79int nfsd_svc(int nrservs, struct net *net, const struct cred *cred);
80int nfsd_dispatch(struct svc_rqst *rqstp, __be32 *statp);
81
82int nfsd_nrthreads(struct net *);
83int nfsd_nrpools(struct net *);
84int nfsd_get_nrthreads(int n, int *, struct net *);
85int nfsd_set_nrthreads(int n, int *, struct net *);
86int nfsd_pool_stats_open(struct inode *, struct file *);
87int nfsd_pool_stats_release(struct inode *, struct file *);
88
89void nfsd_destroy(struct net *net);
90
91bool i_am_nfsd(void);
92
93int get_nfsdfs(struct net *);
94
95struct nfsdfs_client {
96 struct kref cl_ref;
97 void (*cl_release)(struct kref *kref);
98};
99
100struct nfsdfs_client *get_nfsdfs_client(struct inode *);
101struct dentry *nfsd_client_mkdir(struct nfsd_net *nn,
102 struct nfsdfs_client *ncl, u32 id, const struct tree_descr *);
103void nfsd_client_rmdir(struct dentry *dentry);
104
105
106#if defined(CONFIG_NFSD_V2_ACL) || defined(CONFIG_NFSD_V3_ACL)
107#ifdef CONFIG_NFSD_V2_ACL
108extern const struct svc_version nfsd_acl_version2;
109#else
110#define nfsd_acl_version2 NULL
111#endif
112#ifdef CONFIG_NFSD_V3_ACL
113extern const struct svc_version nfsd_acl_version3;
114#else
115#define nfsd_acl_version3 NULL
116#endif
117#endif
118
119struct nfsd_net;
120
121enum vers_op {NFSD_SET, NFSD_CLEAR, NFSD_TEST, NFSD_AVAIL };
122int nfsd_vers(struct nfsd_net *nn, int vers, enum vers_op change);
123int nfsd_minorversion(struct nfsd_net *nn, u32 minorversion, enum vers_op change);
124void nfsd_reset_versions(struct nfsd_net *nn);
125int nfsd_create_serv(struct net *net);
126
127extern int nfsd_max_blksize;
128
129static inline int nfsd_v4client(struct svc_rqst *rq)
130{
131 return rq->rq_prog == NFS_PROGRAM && rq->rq_vers == 4;
132}
133static inline struct user_namespace *
134nfsd_user_namespace(const struct svc_rqst *rqstp)
135{
136 const struct cred *cred = rqstp->rq_xprt->xpt_cred;
137 return cred ? cred->user_ns : &init_user_ns;
138}
139
140/*
141 * NFSv4 State
142 */
143#ifdef CONFIG_NFSD_V4
144extern unsigned long max_delegations;
145int nfsd4_init_slabs(void);
146void nfsd4_free_slabs(void);
147int nfs4_state_start(void);
148int nfs4_state_start_net(struct net *net);
149void nfs4_state_shutdown(void);
150void nfs4_state_shutdown_net(struct net *net);
151int nfs4_reset_recoverydir(char *recdir);
152char * nfs4_recoverydir(void);
153bool nfsd4_spo_must_allow(struct svc_rqst *rqstp);
154#else
155static inline int nfsd4_init_slabs(void) { return 0; }
156static inline void nfsd4_free_slabs(void) { }
157static inline int nfs4_state_start(void) { return 0; }
158static inline int nfs4_state_start_net(struct net *net) { return 0; }
159static inline void nfs4_state_shutdown(void) { }
160static inline void nfs4_state_shutdown_net(struct net *net) { }
161static inline int nfs4_reset_recoverydir(char *recdir) { return 0; }
162static inline char * nfs4_recoverydir(void) {return NULL; }
163static inline bool nfsd4_spo_must_allow(struct svc_rqst *rqstp)
164{
165 return false;
166}
167#endif
168
169/*
170 * lockd binding
171 */
172void nfsd_lockd_init(void);
173void nfsd_lockd_shutdown(void);
174
175
176/*
177 * These macros provide pre-xdr'ed values for faster operation.
178 */
179#define nfs_ok cpu_to_be32(NFS_OK)
180#define nfserr_perm cpu_to_be32(NFSERR_PERM)
181#define nfserr_noent cpu_to_be32(NFSERR_NOENT)
182#define nfserr_io cpu_to_be32(NFSERR_IO)
183#define nfserr_nxio cpu_to_be32(NFSERR_NXIO)
184#define nfserr_eagain cpu_to_be32(NFSERR_EAGAIN)
185#define nfserr_acces cpu_to_be32(NFSERR_ACCES)
186#define nfserr_exist cpu_to_be32(NFSERR_EXIST)
187#define nfserr_xdev cpu_to_be32(NFSERR_XDEV)
188#define nfserr_nodev cpu_to_be32(NFSERR_NODEV)
189#define nfserr_notdir cpu_to_be32(NFSERR_NOTDIR)
190#define nfserr_isdir cpu_to_be32(NFSERR_ISDIR)
191#define nfserr_inval cpu_to_be32(NFSERR_INVAL)
192#define nfserr_fbig cpu_to_be32(NFSERR_FBIG)
193#define nfserr_nospc cpu_to_be32(NFSERR_NOSPC)
194#define nfserr_rofs cpu_to_be32(NFSERR_ROFS)
195#define nfserr_mlink cpu_to_be32(NFSERR_MLINK)
196#define nfserr_opnotsupp cpu_to_be32(NFSERR_OPNOTSUPP)
197#define nfserr_nametoolong cpu_to_be32(NFSERR_NAMETOOLONG)
198#define nfserr_notempty cpu_to_be32(NFSERR_NOTEMPTY)
199#define nfserr_dquot cpu_to_be32(NFSERR_DQUOT)
200#define nfserr_stale cpu_to_be32(NFSERR_STALE)
201#define nfserr_remote cpu_to_be32(NFSERR_REMOTE)
202#define nfserr_wflush cpu_to_be32(NFSERR_WFLUSH)
203#define nfserr_badhandle cpu_to_be32(NFSERR_BADHANDLE)
204#define nfserr_notsync cpu_to_be32(NFSERR_NOT_SYNC)
205#define nfserr_badcookie cpu_to_be32(NFSERR_BAD_COOKIE)
206#define nfserr_notsupp cpu_to_be32(NFSERR_NOTSUPP)
207#define nfserr_toosmall cpu_to_be32(NFSERR_TOOSMALL)
208#define nfserr_serverfault cpu_to_be32(NFSERR_SERVERFAULT)
209#define nfserr_badtype cpu_to_be32(NFSERR_BADTYPE)
210#define nfserr_jukebox cpu_to_be32(NFSERR_JUKEBOX)
211#define nfserr_denied cpu_to_be32(NFSERR_DENIED)
212#define nfserr_deadlock cpu_to_be32(NFSERR_DEADLOCK)
213#define nfserr_expired cpu_to_be32(NFSERR_EXPIRED)
214#define nfserr_bad_cookie cpu_to_be32(NFSERR_BAD_COOKIE)
215#define nfserr_same cpu_to_be32(NFSERR_SAME)
216#define nfserr_clid_inuse cpu_to_be32(NFSERR_CLID_INUSE)
217#define nfserr_stale_clientid cpu_to_be32(NFSERR_STALE_CLIENTID)
218#define nfserr_resource cpu_to_be32(NFSERR_RESOURCE)
219#define nfserr_moved cpu_to_be32(NFSERR_MOVED)
220#define nfserr_nofilehandle cpu_to_be32(NFSERR_NOFILEHANDLE)
221#define nfserr_minor_vers_mismatch cpu_to_be32(NFSERR_MINOR_VERS_MISMATCH)
222#define nfserr_share_denied cpu_to_be32(NFSERR_SHARE_DENIED)
223#define nfserr_stale_stateid cpu_to_be32(NFSERR_STALE_STATEID)
224#define nfserr_old_stateid cpu_to_be32(NFSERR_OLD_STATEID)
225#define nfserr_bad_stateid cpu_to_be32(NFSERR_BAD_STATEID)
226#define nfserr_bad_seqid cpu_to_be32(NFSERR_BAD_SEQID)
227#define nfserr_symlink cpu_to_be32(NFSERR_SYMLINK)
228#define nfserr_not_same cpu_to_be32(NFSERR_NOT_SAME)
229#define nfserr_lock_range cpu_to_be32(NFSERR_LOCK_RANGE)
230#define nfserr_restorefh cpu_to_be32(NFSERR_RESTOREFH)
231#define nfserr_attrnotsupp cpu_to_be32(NFSERR_ATTRNOTSUPP)
232#define nfserr_bad_xdr cpu_to_be32(NFSERR_BAD_XDR)
233#define nfserr_openmode cpu_to_be32(NFSERR_OPENMODE)
234#define nfserr_badowner cpu_to_be32(NFSERR_BADOWNER)
235#define nfserr_locks_held cpu_to_be32(NFSERR_LOCKS_HELD)
236#define nfserr_op_illegal cpu_to_be32(NFSERR_OP_ILLEGAL)
237#define nfserr_grace cpu_to_be32(NFSERR_GRACE)
238#define nfserr_no_grace cpu_to_be32(NFSERR_NO_GRACE)
239#define nfserr_reclaim_bad cpu_to_be32(NFSERR_RECLAIM_BAD)
240#define nfserr_badname cpu_to_be32(NFSERR_BADNAME)
241#define nfserr_cb_path_down cpu_to_be32(NFSERR_CB_PATH_DOWN)
242#define nfserr_locked cpu_to_be32(NFSERR_LOCKED)
243#define nfserr_wrongsec cpu_to_be32(NFSERR_WRONGSEC)
244#define nfserr_badiomode cpu_to_be32(NFS4ERR_BADIOMODE)
245#define nfserr_badlayout cpu_to_be32(NFS4ERR_BADLAYOUT)
246#define nfserr_bad_session_digest cpu_to_be32(NFS4ERR_BAD_SESSION_DIGEST)
247#define nfserr_badsession cpu_to_be32(NFS4ERR_BADSESSION)
248#define nfserr_badslot cpu_to_be32(NFS4ERR_BADSLOT)
249#define nfserr_complete_already cpu_to_be32(NFS4ERR_COMPLETE_ALREADY)
250#define nfserr_conn_not_bound_to_session cpu_to_be32(NFS4ERR_CONN_NOT_BOUND_TO_SESSION)
251#define nfserr_deleg_already_wanted cpu_to_be32(NFS4ERR_DELEG_ALREADY_WANTED)
252#define nfserr_back_chan_busy cpu_to_be32(NFS4ERR_BACK_CHAN_BUSY)
253#define nfserr_layouttrylater cpu_to_be32(NFS4ERR_LAYOUTTRYLATER)
254#define nfserr_layoutunavailable cpu_to_be32(NFS4ERR_LAYOUTUNAVAILABLE)
255#define nfserr_nomatching_layout cpu_to_be32(NFS4ERR_NOMATCHING_LAYOUT)
256#define nfserr_recallconflict cpu_to_be32(NFS4ERR_RECALLCONFLICT)
257#define nfserr_unknown_layouttype cpu_to_be32(NFS4ERR_UNKNOWN_LAYOUTTYPE)
258#define nfserr_seq_misordered cpu_to_be32(NFS4ERR_SEQ_MISORDERED)
259#define nfserr_sequence_pos cpu_to_be32(NFS4ERR_SEQUENCE_POS)
260#define nfserr_req_too_big cpu_to_be32(NFS4ERR_REQ_TOO_BIG)
261#define nfserr_rep_too_big cpu_to_be32(NFS4ERR_REP_TOO_BIG)
262#define nfserr_rep_too_big_to_cache cpu_to_be32(NFS4ERR_REP_TOO_BIG_TO_CACHE)
263#define nfserr_retry_uncached_rep cpu_to_be32(NFS4ERR_RETRY_UNCACHED_REP)
264#define nfserr_unsafe_compound cpu_to_be32(NFS4ERR_UNSAFE_COMPOUND)
265#define nfserr_too_many_ops cpu_to_be32(NFS4ERR_TOO_MANY_OPS)
266#define nfserr_op_not_in_session cpu_to_be32(NFS4ERR_OP_NOT_IN_SESSION)
267#define nfserr_hash_alg_unsupp cpu_to_be32(NFS4ERR_HASH_ALG_UNSUPP)
268#define nfserr_clientid_busy cpu_to_be32(NFS4ERR_CLIENTID_BUSY)
269#define nfserr_pnfs_io_hole cpu_to_be32(NFS4ERR_PNFS_IO_HOLE)
270#define nfserr_seq_false_retry cpu_to_be32(NFS4ERR_SEQ_FALSE_RETRY)
271#define nfserr_bad_high_slot cpu_to_be32(NFS4ERR_BAD_HIGH_SLOT)
272#define nfserr_deadsession cpu_to_be32(NFS4ERR_DEADSESSION)
273#define nfserr_encr_alg_unsupp cpu_to_be32(NFS4ERR_ENCR_ALG_UNSUPP)
274#define nfserr_pnfs_no_layout cpu_to_be32(NFS4ERR_PNFS_NO_LAYOUT)
275#define nfserr_not_only_op cpu_to_be32(NFS4ERR_NOT_ONLY_OP)
276#define nfserr_wrong_cred cpu_to_be32(NFS4ERR_WRONG_CRED)
277#define nfserr_wrong_type cpu_to_be32(NFS4ERR_WRONG_TYPE)
278#define nfserr_dirdeleg_unavail cpu_to_be32(NFS4ERR_DIRDELEG_UNAVAIL)
279#define nfserr_reject_deleg cpu_to_be32(NFS4ERR_REJECT_DELEG)
280#define nfserr_returnconflict cpu_to_be32(NFS4ERR_RETURNCONFLICT)
281#define nfserr_deleg_revoked cpu_to_be32(NFS4ERR_DELEG_REVOKED)
282#define nfserr_partner_notsupp cpu_to_be32(NFS4ERR_PARTNER_NOTSUPP)
283#define nfserr_partner_no_auth cpu_to_be32(NFS4ERR_PARTNER_NO_AUTH)
284#define nfserr_union_notsupp cpu_to_be32(NFS4ERR_UNION_NOTSUPP)
285#define nfserr_offload_denied cpu_to_be32(NFS4ERR_OFFLOAD_DENIED)
286#define nfserr_wrong_lfs cpu_to_be32(NFS4ERR_WRONG_LFS)
287#define nfserr_badlabel cpu_to_be32(NFS4ERR_BADLABEL)
288#define nfserr_file_open cpu_to_be32(NFS4ERR_FILE_OPEN)
289#define nfserr_xattr2big cpu_to_be32(NFS4ERR_XATTR2BIG)
290#define nfserr_noxattr cpu_to_be32(NFS4ERR_NOXATTR)
291
292/* error codes for internal use */
293/* if a request fails due to kmalloc failure, it gets dropped.
294 * Client should resend eventually
295 */
296#define nfserr_dropit cpu_to_be32(30000)
297/* end-of-file indicator in readdir */
298#define nfserr_eof cpu_to_be32(30001)
299/* replay detected */
300#define nfserr_replay_me cpu_to_be32(11001)
301/* nfs41 replay detected */
302#define nfserr_replay_cache cpu_to_be32(11002)
303
304/* Check for dir entries '.' and '..' */
305#define isdotent(n, l) (l < 3 && n[0] == '.' && (l == 1 || n[1] == '.'))
306
307#ifdef CONFIG_NFSD_V4
308
309/* before processing a COMPOUND operation, we have to check that there
310 * is enough space in the buffer for XDR encode to succeed. otherwise,
311 * we might process an operation with side effects, and be unable to
312 * tell the client that the operation succeeded.
313 *
314 * COMPOUND_SLACK_SPACE - this is the minimum bytes of buffer space
315 * needed to encode an "ordinary" _successful_ operation. (GETATTR,
316 * READ, READDIR, and READLINK have their own buffer checks.) if we
317 * fall below this level, we fail the next operation with NFS4ERR_RESOURCE.
318 *
319 * COMPOUND_ERR_SLACK_SPACE - this is the minimum bytes of buffer space
320 * needed to encode an operation which has failed with NFS4ERR_RESOURCE.
321 * care is taken to ensure that we never fall below this level for any
322 * reason.
323 */
324#define COMPOUND_SLACK_SPACE 140 /* OP_GETFH */
325#define COMPOUND_ERR_SLACK_SPACE 16 /* OP_SETATTR */
326
327#define NFSD_LAUNDROMAT_MINTIMEOUT 1 /* seconds */
328
329/*
330 * The following attributes are currently not supported by the NFSv4 server:
331 * ARCHIVE (deprecated anyway)
332 * HIDDEN (unlikely to be supported any time soon)
333 * MIMETYPE (unlikely to be supported any time soon)
334 * QUOTA_* (will be supported in a forthcoming patch)
335 * SYSTEM (unlikely to be supported any time soon)
336 * TIME_BACKUP (unlikely to be supported any time soon)
337 * TIME_CREATE (unlikely to be supported any time soon)
338 */
339#define NFSD4_SUPPORTED_ATTRS_WORD0 \
340(FATTR4_WORD0_SUPPORTED_ATTRS | FATTR4_WORD0_TYPE | FATTR4_WORD0_FH_EXPIRE_TYPE \
341 | FATTR4_WORD0_CHANGE | FATTR4_WORD0_SIZE | FATTR4_WORD0_LINK_SUPPORT \
342 | FATTR4_WORD0_SYMLINK_SUPPORT | FATTR4_WORD0_NAMED_ATTR | FATTR4_WORD0_FSID \
343 | FATTR4_WORD0_UNIQUE_HANDLES | FATTR4_WORD0_LEASE_TIME | FATTR4_WORD0_RDATTR_ERROR \
344 | FATTR4_WORD0_ACLSUPPORT | FATTR4_WORD0_CANSETTIME | FATTR4_WORD0_CASE_INSENSITIVE \
345 | FATTR4_WORD0_CASE_PRESERVING | FATTR4_WORD0_CHOWN_RESTRICTED \
346 | FATTR4_WORD0_FILEHANDLE | FATTR4_WORD0_FILEID | FATTR4_WORD0_FILES_AVAIL \
347 | FATTR4_WORD0_FILES_FREE | FATTR4_WORD0_FILES_TOTAL | FATTR4_WORD0_FS_LOCATIONS | FATTR4_WORD0_HOMOGENEOUS \
348 | FATTR4_WORD0_MAXFILESIZE | FATTR4_WORD0_MAXLINK | FATTR4_WORD0_MAXNAME \
349 | FATTR4_WORD0_MAXREAD | FATTR4_WORD0_MAXWRITE | FATTR4_WORD0_ACL)
350
351#define NFSD4_SUPPORTED_ATTRS_WORD1 \
352(FATTR4_WORD1_MODE | FATTR4_WORD1_NO_TRUNC | FATTR4_WORD1_NUMLINKS \
353 | FATTR4_WORD1_OWNER | FATTR4_WORD1_OWNER_GROUP | FATTR4_WORD1_RAWDEV \
354 | FATTR4_WORD1_SPACE_AVAIL | FATTR4_WORD1_SPACE_FREE | FATTR4_WORD1_SPACE_TOTAL \
355 | FATTR4_WORD1_SPACE_USED | FATTR4_WORD1_TIME_ACCESS | FATTR4_WORD1_TIME_ACCESS_SET \
356 | FATTR4_WORD1_TIME_DELTA | FATTR4_WORD1_TIME_METADATA \
357 | FATTR4_WORD1_TIME_MODIFY | FATTR4_WORD1_TIME_MODIFY_SET | FATTR4_WORD1_MOUNTED_ON_FILEID)
358
359#define NFSD4_SUPPORTED_ATTRS_WORD2 0
360
361/* 4.1 */
362#ifdef CONFIG_NFSD_PNFS
363#define PNFSD_SUPPORTED_ATTRS_WORD1 FATTR4_WORD1_FS_LAYOUT_TYPES
364#define PNFSD_SUPPORTED_ATTRS_WORD2 \
365(FATTR4_WORD2_LAYOUT_BLKSIZE | FATTR4_WORD2_LAYOUT_TYPES)
366#else
367#define PNFSD_SUPPORTED_ATTRS_WORD1 0
368#define PNFSD_SUPPORTED_ATTRS_WORD2 0
369#endif /* CONFIG_NFSD_PNFS */
370
371#define NFSD4_1_SUPPORTED_ATTRS_WORD0 \
372 NFSD4_SUPPORTED_ATTRS_WORD0
373
374#define NFSD4_1_SUPPORTED_ATTRS_WORD1 \
375 (NFSD4_SUPPORTED_ATTRS_WORD1 | PNFSD_SUPPORTED_ATTRS_WORD1)
376
377#define NFSD4_1_SUPPORTED_ATTRS_WORD2 \
378 (NFSD4_SUPPORTED_ATTRS_WORD2 | PNFSD_SUPPORTED_ATTRS_WORD2 | \
379 FATTR4_WORD2_SUPPATTR_EXCLCREAT)
380
381/* 4.2 */
382#ifdef CONFIG_NFSD_V4_SECURITY_LABEL
383#define NFSD4_2_SECURITY_ATTRS FATTR4_WORD2_SECURITY_LABEL
384#else
385#define NFSD4_2_SECURITY_ATTRS 0
386#endif
387
388#define NFSD4_2_SUPPORTED_ATTRS_WORD2 \
389 (NFSD4_1_SUPPORTED_ATTRS_WORD2 | \
390 FATTR4_WORD2_CHANGE_ATTR_TYPE | \
391 FATTR4_WORD2_MODE_UMASK | \
392 NFSD4_2_SECURITY_ATTRS | \
393 FATTR4_WORD2_XATTR_SUPPORT)
394
395extern const u32 nfsd_suppattrs[3][3];
396
397static inline __be32 nfsd4_set_netaddr(struct sockaddr *addr,
398 struct nfs42_netaddr *netaddr)
399{
400 struct sockaddr_in *sin = (struct sockaddr_in *)addr;
401 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)addr;
402 unsigned int port;
403 size_t ret_addr, ret_port;
404
405 switch (addr->sa_family) {
406 case AF_INET:
407 port = ntohs(sin->sin_port);
408 sprintf(netaddr->netid, "tcp");
409 netaddr->netid_len = 3;
410 break;
411 case AF_INET6:
412 port = ntohs(sin6->sin6_port);
413 sprintf(netaddr->netid, "tcp6");
414 netaddr->netid_len = 4;
415 break;
416 default:
417 return nfserr_inval;
418 }
419 ret_addr = rpc_ntop(addr, netaddr->addr, sizeof(netaddr->addr));
420 ret_port = snprintf(netaddr->addr + ret_addr,
421 RPCBIND_MAXUADDRLEN + 1 - ret_addr,
422 ".%u.%u", port >> 8, port & 0xff);
423 WARN_ON(ret_port >= RPCBIND_MAXUADDRLEN + 1 - ret_addr);
424 netaddr->addr_len = ret_addr + ret_port;
425 return 0;
426}
427
428static inline bool bmval_is_subset(const u32 *bm1, const u32 *bm2)
429{
430 return !((bm1[0] & ~bm2[0]) ||
431 (bm1[1] & ~bm2[1]) ||
432 (bm1[2] & ~bm2[2]));
433}
434
435static inline bool nfsd_attrs_supported(u32 minorversion, const u32 *bmval)
436{
437 return bmval_is_subset(bmval, nfsd_suppattrs[minorversion]);
438}
439
440/* These will return ERR_INVAL if specified in GETATTR or READDIR. */
441#define NFSD_WRITEONLY_ATTRS_WORD1 \
442 (FATTR4_WORD1_TIME_ACCESS_SET | FATTR4_WORD1_TIME_MODIFY_SET)
443
444/*
445 * These are the only attrs allowed in CREATE/OPEN/SETATTR. Don't add
446 * a writeable attribute here without also adding code to parse it to
447 * nfsd4_decode_fattr().
448 */
449#define NFSD_WRITEABLE_ATTRS_WORD0 \
450 (FATTR4_WORD0_SIZE | FATTR4_WORD0_ACL)
451#define NFSD_WRITEABLE_ATTRS_WORD1 \
452 (FATTR4_WORD1_MODE | FATTR4_WORD1_OWNER | FATTR4_WORD1_OWNER_GROUP \
453 | FATTR4_WORD1_TIME_ACCESS_SET | FATTR4_WORD1_TIME_MODIFY_SET)
454#ifdef CONFIG_NFSD_V4_SECURITY_LABEL
455#define MAYBE_FATTR4_WORD2_SECURITY_LABEL \
456 FATTR4_WORD2_SECURITY_LABEL
457#else
458#define MAYBE_FATTR4_WORD2_SECURITY_LABEL 0
459#endif
460#define NFSD_WRITEABLE_ATTRS_WORD2 \
461 (FATTR4_WORD2_MODE_UMASK \
462 | MAYBE_FATTR4_WORD2_SECURITY_LABEL)
463
464#define NFSD_SUPPATTR_EXCLCREAT_WORD0 \
465 NFSD_WRITEABLE_ATTRS_WORD0
466/*
467 * we currently store the exclusive create verifier in the v_{a,m}time
468 * attributes so the client can't set these at create time using EXCLUSIVE4_1
469 */
470#define NFSD_SUPPATTR_EXCLCREAT_WORD1 \
471 (NFSD_WRITEABLE_ATTRS_WORD1 & \
472 ~(FATTR4_WORD1_TIME_ACCESS_SET | FATTR4_WORD1_TIME_MODIFY_SET))
473#define NFSD_SUPPATTR_EXCLCREAT_WORD2 \
474 NFSD_WRITEABLE_ATTRS_WORD2
475
476extern int nfsd4_is_junction(struct dentry *dentry);
477extern int register_cld_notifier(void);
478extern void unregister_cld_notifier(void);
479#else /* CONFIG_NFSD_V4 */
480static inline int nfsd4_is_junction(struct dentry *dentry)
481{
482 return 0;
483}
484
485#define register_cld_notifier() 0
486#define unregister_cld_notifier() do { } while(0)
487
488#endif /* CONFIG_NFSD_V4 */
489
490#endif /* LINUX_NFSD_NFSD_H */