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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
23#include <uapi/linux/nfsd/debug.h>
24
25#include "netns.h"
26#include "stats.h"
27#include "export.h"
28
29#undef ifdebug
30#ifdef CONFIG_SUNRPC_DEBUG
31# define ifdebug(flag) if (nfsd_debug & NFSDDBG_##flag)
32#else
33# define ifdebug(flag) if (0)
34#endif
35
36
37
38
39#define NFSD_SUPPORTED_MINOR_VERSION 2
40
41
42
43#define NFSSVC_MAXBLKSIZE RPCSVC_MAXPAYLOAD
44
45#define NFSSVC_MAXBLKSIZE_V2 (8*1024)
46
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55
56
57
58#define NFSD_BUFSIZE ((RPC_MAX_HEADER_WITH_AUTH+26)*XDR_UNIT + NFSSVC_MAXBLKSIZE)
59
60struct readdir_cd {
61 __be32 err;
62};
63
64
65extern struct svc_program nfsd_program;
66extern const struct svc_version nfsd_version2, nfsd_version3,
67 nfsd_version4;
68extern struct mutex nfsd_mutex;
69extern spinlock_t nfsd_drc_lock;
70extern unsigned long nfsd_drc_max_mem;
71extern unsigned long nfsd_drc_mem_used;
72
73extern const struct seq_operations nfs_exports_op;
74
75
76
77
78int nfsd_svc(int nrservs, struct net *net, const struct cred *cred);
79int nfsd_dispatch(struct svc_rqst *rqstp, __be32 *statp);
80
81int nfsd_nrthreads(struct net *);
82int nfsd_nrpools(struct net *);
83int nfsd_get_nrthreads(int n, int *, struct net *);
84int nfsd_set_nrthreads(int n, int *, struct net *);
85int nfsd_pool_stats_open(struct inode *, struct file *);
86int nfsd_pool_stats_release(struct inode *, struct file *);
87
88void nfsd_destroy(struct net *net);
89
90struct nfsdfs_client {
91 struct kref cl_ref;
92 void (*cl_release)(struct kref *kref);
93};
94
95struct nfsdfs_client *get_nfsdfs_client(struct inode *);
96struct dentry *nfsd_client_mkdir(struct nfsd_net *nn,
97 struct nfsdfs_client *ncl, u32 id, const struct tree_descr *);
98void nfsd_client_rmdir(struct dentry *dentry);
99
100#if defined(CONFIG_NFSD_V2_ACL) || defined(CONFIG_NFSD_V3_ACL)
101#ifdef CONFIG_NFSD_V2_ACL
102extern const struct svc_version nfsd_acl_version2;
103#else
104#define nfsd_acl_version2 NULL
105#endif
106#ifdef CONFIG_NFSD_V3_ACL
107extern const struct svc_version nfsd_acl_version3;
108#else
109#define nfsd_acl_version3 NULL
110#endif
111#endif
112
113struct nfsd_net;
114
115enum vers_op {NFSD_SET, NFSD_CLEAR, NFSD_TEST, NFSD_AVAIL };
116int nfsd_vers(struct nfsd_net *nn, int vers, enum vers_op change);
117int nfsd_minorversion(struct nfsd_net *nn, u32 minorversion, enum vers_op change);
118void nfsd_reset_versions(struct nfsd_net *nn);
119int nfsd_create_serv(struct net *net);
120
121extern int nfsd_max_blksize;
122
123static inline int nfsd_v4client(struct svc_rqst *rq)
124{
125 return rq->rq_prog == NFS_PROGRAM && rq->rq_vers == 4;
126}
127static inline struct user_namespace *
128nfsd_user_namespace(const struct svc_rqst *rqstp)
129{
130 const struct cred *cred = rqstp->rq_xprt->xpt_cred;
131 return cred ? cred->user_ns : &init_user_ns;
132}
133
134
135
136
137#ifdef CONFIG_NFSD_V4
138extern unsigned long max_delegations;
139int nfsd4_init_slabs(void);
140void nfsd4_free_slabs(void);
141int nfs4_state_start(void);
142int nfs4_state_start_net(struct net *net);
143void nfs4_state_shutdown(void);
144void nfs4_state_shutdown_net(struct net *net);
145void nfs4_reset_lease(time_t leasetime);
146int nfs4_reset_recoverydir(char *recdir);
147char * nfs4_recoverydir(void);
148bool nfsd4_spo_must_allow(struct svc_rqst *rqstp);
149#else
150static inline int nfsd4_init_slabs(void) { return 0; }
151static inline void nfsd4_free_slabs(void) { }
152static inline int nfs4_state_start(void) { return 0; }
153static inline int nfs4_state_start_net(struct net *net) { return 0; }
154static inline void nfs4_state_shutdown(void) { }
155static inline void nfs4_state_shutdown_net(struct net *net) { }
156static inline void nfs4_reset_lease(time_t leasetime) { }
157static inline int nfs4_reset_recoverydir(char *recdir) { return 0; }
158static inline char * nfs4_recoverydir(void) {return NULL; }
159static inline bool nfsd4_spo_must_allow(struct svc_rqst *rqstp)
160{
161 return false;
162}
163#endif
164
165
166
167
168void nfsd_lockd_init(void);
169void nfsd_lockd_shutdown(void);
170
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174
175#define nfs_ok cpu_to_be32(NFS_OK)
176#define nfserr_perm cpu_to_be32(NFSERR_PERM)
177#define nfserr_noent cpu_to_be32(NFSERR_NOENT)
178#define nfserr_io cpu_to_be32(NFSERR_IO)
179#define nfserr_nxio cpu_to_be32(NFSERR_NXIO)
180#define nfserr_eagain cpu_to_be32(NFSERR_EAGAIN)
181#define nfserr_acces cpu_to_be32(NFSERR_ACCES)
182#define nfserr_exist cpu_to_be32(NFSERR_EXIST)
183#define nfserr_xdev cpu_to_be32(NFSERR_XDEV)
184#define nfserr_nodev cpu_to_be32(NFSERR_NODEV)
185#define nfserr_notdir cpu_to_be32(NFSERR_NOTDIR)
186#define nfserr_isdir cpu_to_be32(NFSERR_ISDIR)
187#define nfserr_inval cpu_to_be32(NFSERR_INVAL)
188#define nfserr_fbig cpu_to_be32(NFSERR_FBIG)
189#define nfserr_nospc cpu_to_be32(NFSERR_NOSPC)
190#define nfserr_rofs cpu_to_be32(NFSERR_ROFS)
191#define nfserr_mlink cpu_to_be32(NFSERR_MLINK)
192#define nfserr_opnotsupp cpu_to_be32(NFSERR_OPNOTSUPP)
193#define nfserr_nametoolong cpu_to_be32(NFSERR_NAMETOOLONG)
194#define nfserr_notempty cpu_to_be32(NFSERR_NOTEMPTY)
195#define nfserr_dquot cpu_to_be32(NFSERR_DQUOT)
196#define nfserr_stale cpu_to_be32(NFSERR_STALE)
197#define nfserr_remote cpu_to_be32(NFSERR_REMOTE)
198#define nfserr_wflush cpu_to_be32(NFSERR_WFLUSH)
199#define nfserr_badhandle cpu_to_be32(NFSERR_BADHANDLE)
200#define nfserr_notsync cpu_to_be32(NFSERR_NOT_SYNC)
201#define nfserr_badcookie cpu_to_be32(NFSERR_BAD_COOKIE)
202#define nfserr_notsupp cpu_to_be32(NFSERR_NOTSUPP)
203#define nfserr_toosmall cpu_to_be32(NFSERR_TOOSMALL)
204#define nfserr_serverfault cpu_to_be32(NFSERR_SERVERFAULT)
205#define nfserr_badtype cpu_to_be32(NFSERR_BADTYPE)
206#define nfserr_jukebox cpu_to_be32(NFSERR_JUKEBOX)
207#define nfserr_denied cpu_to_be32(NFSERR_DENIED)
208#define nfserr_deadlock cpu_to_be32(NFSERR_DEADLOCK)
209#define nfserr_expired cpu_to_be32(NFSERR_EXPIRED)
210#define nfserr_bad_cookie cpu_to_be32(NFSERR_BAD_COOKIE)
211#define nfserr_same cpu_to_be32(NFSERR_SAME)
212#define nfserr_clid_inuse cpu_to_be32(NFSERR_CLID_INUSE)
213#define nfserr_stale_clientid cpu_to_be32(NFSERR_STALE_CLIENTID)
214#define nfserr_resource cpu_to_be32(NFSERR_RESOURCE)
215#define nfserr_moved cpu_to_be32(NFSERR_MOVED)
216#define nfserr_nofilehandle cpu_to_be32(NFSERR_NOFILEHANDLE)
217#define nfserr_minor_vers_mismatch cpu_to_be32(NFSERR_MINOR_VERS_MISMATCH)
218#define nfserr_share_denied cpu_to_be32(NFSERR_SHARE_DENIED)
219#define nfserr_stale_stateid cpu_to_be32(NFSERR_STALE_STATEID)
220#define nfserr_old_stateid cpu_to_be32(NFSERR_OLD_STATEID)
221#define nfserr_bad_stateid cpu_to_be32(NFSERR_BAD_STATEID)
222#define nfserr_bad_seqid cpu_to_be32(NFSERR_BAD_SEQID)
223#define nfserr_symlink cpu_to_be32(NFSERR_SYMLINK)
224#define nfserr_not_same cpu_to_be32(NFSERR_NOT_SAME)
225#define nfserr_lock_range cpu_to_be32(NFSERR_LOCK_RANGE)
226#define nfserr_restorefh cpu_to_be32(NFSERR_RESTOREFH)
227#define nfserr_attrnotsupp cpu_to_be32(NFSERR_ATTRNOTSUPP)
228#define nfserr_bad_xdr cpu_to_be32(NFSERR_BAD_XDR)
229#define nfserr_openmode cpu_to_be32(NFSERR_OPENMODE)
230#define nfserr_badowner cpu_to_be32(NFSERR_BADOWNER)
231#define nfserr_locks_held cpu_to_be32(NFSERR_LOCKS_HELD)
232#define nfserr_op_illegal cpu_to_be32(NFSERR_OP_ILLEGAL)
233#define nfserr_grace cpu_to_be32(NFSERR_GRACE)
234#define nfserr_no_grace cpu_to_be32(NFSERR_NO_GRACE)
235#define nfserr_reclaim_bad cpu_to_be32(NFSERR_RECLAIM_BAD)
236#define nfserr_badname cpu_to_be32(NFSERR_BADNAME)
237#define nfserr_cb_path_down cpu_to_be32(NFSERR_CB_PATH_DOWN)
238#define nfserr_locked cpu_to_be32(NFSERR_LOCKED)
239#define nfserr_wrongsec cpu_to_be32(NFSERR_WRONGSEC)
240#define nfserr_badiomode cpu_to_be32(NFS4ERR_BADIOMODE)
241#define nfserr_badlayout cpu_to_be32(NFS4ERR_BADLAYOUT)
242#define nfserr_bad_session_digest cpu_to_be32(NFS4ERR_BAD_SESSION_DIGEST)
243#define nfserr_badsession cpu_to_be32(NFS4ERR_BADSESSION)
244#define nfserr_badslot cpu_to_be32(NFS4ERR_BADSLOT)
245#define nfserr_complete_already cpu_to_be32(NFS4ERR_COMPLETE_ALREADY)
246#define nfserr_conn_not_bound_to_session cpu_to_be32(NFS4ERR_CONN_NOT_BOUND_TO_SESSION)
247#define nfserr_deleg_already_wanted cpu_to_be32(NFS4ERR_DELEG_ALREADY_WANTED)
248#define nfserr_back_chan_busy cpu_to_be32(NFS4ERR_BACK_CHAN_BUSY)
249#define nfserr_layouttrylater cpu_to_be32(NFS4ERR_LAYOUTTRYLATER)
250#define nfserr_layoutunavailable cpu_to_be32(NFS4ERR_LAYOUTUNAVAILABLE)
251#define nfserr_nomatching_layout cpu_to_be32(NFS4ERR_NOMATCHING_LAYOUT)
252#define nfserr_recallconflict cpu_to_be32(NFS4ERR_RECALLCONFLICT)
253#define nfserr_unknown_layouttype cpu_to_be32(NFS4ERR_UNKNOWN_LAYOUTTYPE)
254#define nfserr_seq_misordered cpu_to_be32(NFS4ERR_SEQ_MISORDERED)
255#define nfserr_sequence_pos cpu_to_be32(NFS4ERR_SEQUENCE_POS)
256#define nfserr_req_too_big cpu_to_be32(NFS4ERR_REQ_TOO_BIG)
257#define nfserr_rep_too_big cpu_to_be32(NFS4ERR_REP_TOO_BIG)
258#define nfserr_rep_too_big_to_cache cpu_to_be32(NFS4ERR_REP_TOO_BIG_TO_CACHE)
259#define nfserr_retry_uncached_rep cpu_to_be32(NFS4ERR_RETRY_UNCACHED_REP)
260#define nfserr_unsafe_compound cpu_to_be32(NFS4ERR_UNSAFE_COMPOUND)
261#define nfserr_too_many_ops cpu_to_be32(NFS4ERR_TOO_MANY_OPS)
262#define nfserr_op_not_in_session cpu_to_be32(NFS4ERR_OP_NOT_IN_SESSION)
263#define nfserr_hash_alg_unsupp cpu_to_be32(NFS4ERR_HASH_ALG_UNSUPP)
264#define nfserr_clientid_busy cpu_to_be32(NFS4ERR_CLIENTID_BUSY)
265#define nfserr_pnfs_io_hole cpu_to_be32(NFS4ERR_PNFS_IO_HOLE)
266#define nfserr_seq_false_retry cpu_to_be32(NFS4ERR_SEQ_FALSE_RETRY)
267#define nfserr_bad_high_slot cpu_to_be32(NFS4ERR_BAD_HIGH_SLOT)
268#define nfserr_deadsession cpu_to_be32(NFS4ERR_DEADSESSION)
269#define nfserr_encr_alg_unsupp cpu_to_be32(NFS4ERR_ENCR_ALG_UNSUPP)
270#define nfserr_pnfs_no_layout cpu_to_be32(NFS4ERR_PNFS_NO_LAYOUT)
271#define nfserr_not_only_op cpu_to_be32(NFS4ERR_NOT_ONLY_OP)
272#define nfserr_wrong_cred cpu_to_be32(NFS4ERR_WRONG_CRED)
273#define nfserr_wrong_type cpu_to_be32(NFS4ERR_WRONG_TYPE)
274#define nfserr_dirdeleg_unavail cpu_to_be32(NFS4ERR_DIRDELEG_UNAVAIL)
275#define nfserr_reject_deleg cpu_to_be32(NFS4ERR_REJECT_DELEG)
276#define nfserr_returnconflict cpu_to_be32(NFS4ERR_RETURNCONFLICT)
277#define nfserr_deleg_revoked cpu_to_be32(NFS4ERR_DELEG_REVOKED)
278#define nfserr_partner_notsupp cpu_to_be32(NFS4ERR_PARTNER_NOTSUPP)
279#define nfserr_partner_no_auth cpu_to_be32(NFS4ERR_PARTNER_NO_AUTH)
280#define nfserr_union_notsupp cpu_to_be32(NFS4ERR_UNION_NOTSUPP)
281#define nfserr_offload_denied cpu_to_be32(NFS4ERR_OFFLOAD_DENIED)
282#define nfserr_wrong_lfs cpu_to_be32(NFS4ERR_WRONG_LFS)
283#define nfserr_badlabel cpu_to_be32(NFS4ERR_BADLABEL)
284
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288
289#define nfserr_dropit cpu_to_be32(30000)
290
291#define nfserr_eof cpu_to_be32(30001)
292
293#define nfserr_replay_me cpu_to_be32(11001)
294
295#define nfserr_replay_cache cpu_to_be32(11002)
296
297
298#define isdotent(n, l) (l < 3 && n[0] == '.' && (l == 1 || n[1] == '.'))
299
300#ifdef CONFIG_NFSD_V4
301
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317#define COMPOUND_SLACK_SPACE 140
318#define COMPOUND_ERR_SLACK_SPACE 16
319
320#define NFSD_LAUNDROMAT_MINTIMEOUT 1
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331
332#define NFSD4_SUPPORTED_ATTRS_WORD0 \
333(FATTR4_WORD0_SUPPORTED_ATTRS | FATTR4_WORD0_TYPE | FATTR4_WORD0_FH_EXPIRE_TYPE \
334 | FATTR4_WORD0_CHANGE | FATTR4_WORD0_SIZE | FATTR4_WORD0_LINK_SUPPORT \
335 | FATTR4_WORD0_SYMLINK_SUPPORT | FATTR4_WORD0_NAMED_ATTR | FATTR4_WORD0_FSID \
336 | FATTR4_WORD0_UNIQUE_HANDLES | FATTR4_WORD0_LEASE_TIME | FATTR4_WORD0_RDATTR_ERROR \
337 | FATTR4_WORD0_ACLSUPPORT | FATTR4_WORD0_CANSETTIME | FATTR4_WORD0_CASE_INSENSITIVE \
338 | FATTR4_WORD0_CASE_PRESERVING | FATTR4_WORD0_CHOWN_RESTRICTED \
339 | FATTR4_WORD0_FILEHANDLE | FATTR4_WORD0_FILEID | FATTR4_WORD0_FILES_AVAIL \
340 | FATTR4_WORD0_FILES_FREE | FATTR4_WORD0_FILES_TOTAL | FATTR4_WORD0_FS_LOCATIONS | FATTR4_WORD0_HOMOGENEOUS \
341 | FATTR4_WORD0_MAXFILESIZE | FATTR4_WORD0_MAXLINK | FATTR4_WORD0_MAXNAME \
342 | FATTR4_WORD0_MAXREAD | FATTR4_WORD0_MAXWRITE | FATTR4_WORD0_ACL)
343
344#define NFSD4_SUPPORTED_ATTRS_WORD1 \
345(FATTR4_WORD1_MODE | FATTR4_WORD1_NO_TRUNC | FATTR4_WORD1_NUMLINKS \
346 | FATTR4_WORD1_OWNER | FATTR4_WORD1_OWNER_GROUP | FATTR4_WORD1_RAWDEV \
347 | FATTR4_WORD1_SPACE_AVAIL | FATTR4_WORD1_SPACE_FREE | FATTR4_WORD1_SPACE_TOTAL \
348 | FATTR4_WORD1_SPACE_USED | FATTR4_WORD1_TIME_ACCESS | FATTR4_WORD1_TIME_ACCESS_SET \
349 | FATTR4_WORD1_TIME_DELTA | FATTR4_WORD1_TIME_METADATA \
350 | FATTR4_WORD1_TIME_MODIFY | FATTR4_WORD1_TIME_MODIFY_SET | FATTR4_WORD1_MOUNTED_ON_FILEID)
351
352#define NFSD4_SUPPORTED_ATTRS_WORD2 0
353
354
355#ifdef CONFIG_NFSD_PNFS
356#define PNFSD_SUPPORTED_ATTRS_WORD1 FATTR4_WORD1_FS_LAYOUT_TYPES
357#define PNFSD_SUPPORTED_ATTRS_WORD2 \
358(FATTR4_WORD2_LAYOUT_BLKSIZE | FATTR4_WORD2_LAYOUT_TYPES)
359#else
360#define PNFSD_SUPPORTED_ATTRS_WORD1 0
361#define PNFSD_SUPPORTED_ATTRS_WORD2 0
362#endif
363
364#define NFSD4_1_SUPPORTED_ATTRS_WORD0 \
365 NFSD4_SUPPORTED_ATTRS_WORD0
366
367#define NFSD4_1_SUPPORTED_ATTRS_WORD1 \
368 (NFSD4_SUPPORTED_ATTRS_WORD1 | PNFSD_SUPPORTED_ATTRS_WORD1)
369
370#define NFSD4_1_SUPPORTED_ATTRS_WORD2 \
371 (NFSD4_SUPPORTED_ATTRS_WORD2 | PNFSD_SUPPORTED_ATTRS_WORD2 | \
372 FATTR4_WORD2_SUPPATTR_EXCLCREAT)
373
374
375#ifdef CONFIG_NFSD_V4_SECURITY_LABEL
376#define NFSD4_2_SECURITY_ATTRS FATTR4_WORD2_SECURITY_LABEL
377#else
378#define NFSD4_2_SECURITY_ATTRS 0
379#endif
380
381#define NFSD4_2_SUPPORTED_ATTRS_WORD2 \
382 (NFSD4_1_SUPPORTED_ATTRS_WORD2 | \
383 FATTR4_WORD2_CHANGE_ATTR_TYPE | \
384 FATTR4_WORD2_MODE_UMASK | \
385 NFSD4_2_SECURITY_ATTRS)
386
387extern const u32 nfsd_suppattrs[3][3];
388
389static inline bool bmval_is_subset(const u32 *bm1, const u32 *bm2)
390{
391 return !((bm1[0] & ~bm2[0]) ||
392 (bm1[1] & ~bm2[1]) ||
393 (bm1[2] & ~bm2[2]));
394}
395
396static inline bool nfsd_attrs_supported(u32 minorversion, const u32 *bmval)
397{
398 return bmval_is_subset(bmval, nfsd_suppattrs[minorversion]);
399}
400
401
402#define NFSD_WRITEONLY_ATTRS_WORD1 \
403 (FATTR4_WORD1_TIME_ACCESS_SET | FATTR4_WORD1_TIME_MODIFY_SET)
404
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409
410#define NFSD_WRITEABLE_ATTRS_WORD0 \
411 (FATTR4_WORD0_SIZE | FATTR4_WORD0_ACL)
412#define NFSD_WRITEABLE_ATTRS_WORD1 \
413 (FATTR4_WORD1_MODE | FATTR4_WORD1_OWNER | FATTR4_WORD1_OWNER_GROUP \
414 | FATTR4_WORD1_TIME_ACCESS_SET | FATTR4_WORD1_TIME_MODIFY_SET)
415#ifdef CONFIG_NFSD_V4_SECURITY_LABEL
416#define MAYBE_FATTR4_WORD2_SECURITY_LABEL \
417 FATTR4_WORD2_SECURITY_LABEL
418#else
419#define MAYBE_FATTR4_WORD2_SECURITY_LABEL 0
420#endif
421#define NFSD_WRITEABLE_ATTRS_WORD2 \
422 (FATTR4_WORD2_MODE_UMASK \
423 | MAYBE_FATTR4_WORD2_SECURITY_LABEL)
424
425#define NFSD_SUPPATTR_EXCLCREAT_WORD0 \
426 NFSD_WRITEABLE_ATTRS_WORD0
427
428
429
430
431#define NFSD_SUPPATTR_EXCLCREAT_WORD1 \
432 (NFSD_WRITEABLE_ATTRS_WORD1 & \
433 ~(FATTR4_WORD1_TIME_ACCESS_SET | FATTR4_WORD1_TIME_MODIFY_SET))
434#define NFSD_SUPPATTR_EXCLCREAT_WORD2 \
435 NFSD_WRITEABLE_ATTRS_WORD2
436
437extern int nfsd4_is_junction(struct dentry *dentry);
438extern int register_cld_notifier(void);
439extern void unregister_cld_notifier(void);
440#else
441static inline int nfsd4_is_junction(struct dentry *dentry)
442{
443 return 0;
444}
445
446#define register_cld_notifier() 0
447#define unregister_cld_notifier() do { } while(0)
448
449#endif
450
451#endif
452
