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1/*
2 * linux/include/linux/nfsd/nfsd.h
3 *
4 * Hodge-podge collection of knfsd-related stuff.
5 * I will sort this out later.
6 *
7 * Copyright (C) 1995-1997 Olaf Kirch <okir@monad.swb.de>
8 */
9
10#ifndef LINUX_NFSD_NFSD_H
11#define LINUX_NFSD_NFSD_H
12
13#include <linux/types.h>
14#include <linux/unistd.h>
15#include <linux/dirent.h>
16#include <linux/fs.h>
17#include <linux/posix_acl.h>
18#include <linux/mount.h>
19
20#include <linux/nfsd/debug.h>
21#include <linux/nfsd/nfsfh.h>
22#include <linux/nfsd/export.h>
23#include <linux/nfsd/stats.h>
24/*
25 * nfsd version
26 */
27#define NFSD_VERSION "0.5"
28#define NFSD_SUPPORTED_MINOR_VERSION 0
29
30/*
31 * Special flags for nfsd_permission. These must be different from MAY_READ,
32 * MAY_WRITE, and MAY_EXEC.
33 */
34#define MAY_NOP 0
35#define MAY_SATTR 8
36#define MAY_TRUNC 16
37#define MAY_LOCK 32
38#define MAY_OWNER_OVERRIDE 64
39#define MAY_LOCAL_ACCESS 128 /* IRIX doing local access check on device special file*/
40#if (MAY_SATTR | MAY_TRUNC | MAY_LOCK | MAY_OWNER_OVERRIDE | MAY_LOCAL_ACCESS) & (MAY_READ | MAY_WRITE | MAY_EXEC)
41# error "please use a different value for MAY_SATTR or MAY_TRUNC or MAY_LOCK or MAY_LOCAL_ACCESS or MAY_OWNER_OVERRIDE."
42#endif
43#define MAY_CREATE (MAY_EXEC|MAY_WRITE)
44#define MAY_REMOVE (MAY_EXEC|MAY_WRITE|MAY_TRUNC)
45
46/*
47 * Callback function for readdir
48 */
49struct readdir_cd {
50 __be32 err; /* 0, nfserr, or nfserr_eof */
51};
52typedef int (*nfsd_dirop_t)(struct inode *, struct dentry *, int, int);
53
54extern struct svc_program nfsd_program;
55extern struct svc_version nfsd_version2, nfsd_version3,
56 nfsd_version4;
57extern struct svc_serv *nfsd_serv;
58
59extern struct seq_operations nfs_exports_op;
60
61/*
62 * Function prototypes.
63 */
64int nfsd_svc(unsigned short port, int nrservs);
65int nfsd_dispatch(struct svc_rqst *rqstp, __be32 *statp);
66
67int nfsd_nrthreads(void);
68int nfsd_nrpools(void);
69int nfsd_get_nrthreads(int n, int *);
70int nfsd_set_nrthreads(int n, int *);
71
72/* nfsd/vfs.c */
73int fh_lock_parent(struct svc_fh *, struct dentry *);
74int nfsd_racache_init(int);
75void nfsd_racache_shutdown(void);
76int nfsd_cross_mnt(struct svc_rqst *rqstp, struct dentry **dpp,
77 struct svc_export **expp);
78__be32 nfsd_lookup(struct svc_rqst *, struct svc_fh *,
79 const char *, unsigned int, struct svc_fh *);
80__be32 nfsd_lookup_dentry(struct svc_rqst *, struct svc_fh *,
81 const char *, unsigned int,
82 struct svc_export **, struct dentry **);
83__be32 nfsd_setattr(struct svc_rqst *, struct svc_fh *,
84 struct iattr *, int, time_t);
85#ifdef CONFIG_NFSD_V4
86__be32 nfsd4_set_nfs4_acl(struct svc_rqst *, struct svc_fh *,
87 struct nfs4_acl *);
88int nfsd4_get_nfs4_acl(struct svc_rqst *, struct dentry *, struct nfs4_acl **);
89#endif /* CONFIG_NFSD_V4 */
90__be32 nfsd_create(struct svc_rqst *, struct svc_fh *,
91 char *name, int len, struct iattr *attrs,
92 int type, dev_t rdev, struct svc_fh *res);
93#ifdef CONFIG_NFSD_V3
94__be32 nfsd_access(struct svc_rqst *, struct svc_fh *, u32 *, u32 *);
95__be32 nfsd_create_v3(struct svc_rqst *, struct svc_fh *,
96 char *name, int len, struct iattr *attrs,
97 struct svc_fh *res, int createmode,
98 u32 *verifier, int *truncp, int *created);
99__be32 nfsd_commit(struct svc_rqst *, struct svc_fh *,
100 loff_t, unsigned long);
101#endif /* CONFIG_NFSD_V3 */
102__be32 nfsd_open(struct svc_rqst *, struct svc_fh *, int,
103 int, struct file **);
104void nfsd_close(struct file *);
105__be32 nfsd_read(struct svc_rqst *, struct svc_fh *, struct file *,
106 loff_t, struct kvec *, int, unsigned long *);
107__be32 nfsd_write(struct svc_rqst *, struct svc_fh *,struct file *,
108 loff_t, struct kvec *,int, unsigned long, int *);
109__be32 nfsd_readlink(struct svc_rqst *, struct svc_fh *,
110 char *, int *);
111__be32 nfsd_symlink(struct svc_rqst *, struct svc_fh *,
112 char *name, int len, char *path, int plen,
113 struct svc_fh *res, struct iattr *);
114__be32 nfsd_link(struct svc_rqst *, struct svc_fh *,
115 char *, int, struct svc_fh *);
116__be32 nfsd_rename(struct svc_rqst *,
117 struct svc_fh *, char *, int,
118 struct svc_fh *, char *, int);
119__be32 nfsd_remove(struct svc_rqst *,
120 struct svc_fh *, char *, int);
121__be32 nfsd_unlink(struct svc_rqst *, struct svc_fh *, int type,
122 char *name, int len);
123int nfsd_truncate(struct svc_rqst *, struct svc_fh *,
124 unsigned long size);
125__be32 nfsd_readdir(struct svc_rqst *, struct svc_fh *,
126 loff_t *, struct readdir_cd *, filldir_t);
127__be32 nfsd_statfs(struct svc_rqst *, struct svc_fh *,
128 struct kstatfs *);
129
130int nfsd_notify_change(struct inode *, struct iattr *);
131__be32 nfsd_permission(struct svc_rqst *, struct svc_export *,
132 struct dentry *, int);
133int nfsd_sync_dir(struct dentry *dp);
134
135#if defined(CONFIG_NFSD_V2_ACL) || defined(CONFIG_NFSD_V3_ACL)
136#ifdef CONFIG_NFSD_V2_ACL
137extern struct svc_version nfsd_acl_version2;
138#else
139#define nfsd_acl_version2 NULL
140#endif
141#ifdef CONFIG_NFSD_V3_ACL
142extern struct svc_version nfsd_acl_version3;
143#else
144#define nfsd_acl_version3 NULL
145#endif
146struct posix_acl *nfsd_get_posix_acl(struct svc_fh *, int);
147int nfsd_set_posix_acl(struct svc_fh *, int, struct posix_acl *);
148#endif
149
150enum vers_op {NFSD_SET, NFSD_CLEAR, NFSD_TEST, NFSD_AVAIL };
151int nfsd_vers(int vers, enum vers_op change);
152void nfsd_reset_versions(void);
153int nfsd_create_serv(void);
154
155extern int nfsd_max_blksize;
156
157/*
158 * NFSv4 State
159 */
160#ifdef CONFIG_NFSD_V4
161extern unsigned int max_delegations;
162int nfs4_state_init(void);
163void nfsd4_free_slabs(void);
164void nfs4_state_start(void);
165void nfs4_state_shutdown(void);
166time_t nfs4_lease_time(void);
167void nfs4_reset_lease(time_t leasetime);
168int nfs4_reset_recoverydir(char *recdir);
169#else
170static inline int nfs4_state_init(void) { return 0; }
171static inline void nfsd4_free_slabs(void) { }
172static inline void nfs4_state_start(void) { }
173static inline void nfs4_state_shutdown(void) { }
174static inline time_t nfs4_lease_time(void) { return 0; }
175static inline void nfs4_reset_lease(time_t leasetime) { }
176static inline int nfs4_reset_recoverydir(char *recdir) { return 0; }
177#endif
178
179/*
180 * lockd binding
181 */
182void nfsd_lockd_init(void);
183void nfsd_lockd_shutdown(void);
184
185
186/*
187 * These macros provide pre-xdr'ed values for faster operation.
188 */
189#define nfs_ok __constant_htonl(NFS_OK)
190#define nfserr_perm __constant_htonl(NFSERR_PERM)
191#define nfserr_noent __constant_htonl(NFSERR_NOENT)
192#define nfserr_io __constant_htonl(NFSERR_IO)
193#define nfserr_nxio __constant_htonl(NFSERR_NXIO)
194#define nfserr_eagain __constant_htonl(NFSERR_EAGAIN)
195#define nfserr_acces __constant_htonl(NFSERR_ACCES)
196#define nfserr_exist __constant_htonl(NFSERR_EXIST)
197#define nfserr_xdev __constant_htonl(NFSERR_XDEV)
198#define nfserr_nodev __constant_htonl(NFSERR_NODEV)
199#define nfserr_notdir __constant_htonl(NFSERR_NOTDIR)
200#define nfserr_isdir __constant_htonl(NFSERR_ISDIR)
201#define nfserr_inval __constant_htonl(NFSERR_INVAL)
202#define nfserr_fbig __constant_htonl(NFSERR_FBIG)
203#define nfserr_nospc __constant_htonl(NFSERR_NOSPC)
204#define nfserr_rofs __constant_htonl(NFSERR_ROFS)
205#define nfserr_mlink __constant_htonl(NFSERR_MLINK)
206#define nfserr_opnotsupp __constant_htonl(NFSERR_OPNOTSUPP)
207#define nfserr_nametoolong __constant_htonl(NFSERR_NAMETOOLONG)
208#define nfserr_notempty __constant_htonl(NFSERR_NOTEMPTY)
209#define nfserr_dquot __constant_htonl(NFSERR_DQUOT)
210#define nfserr_stale __constant_htonl(NFSERR_STALE)
211#define nfserr_remote __constant_htonl(NFSERR_REMOTE)
212#define nfserr_wflush __constant_htonl(NFSERR_WFLUSH)
213#define nfserr_badhandle __constant_htonl(NFSERR_BADHANDLE)
214#define nfserr_notsync __constant_htonl(NFSERR_NOT_SYNC)
215#define nfserr_badcookie __constant_htonl(NFSERR_BAD_COOKIE)
216#define nfserr_notsupp __constant_htonl(NFSERR_NOTSUPP)
217#define nfserr_toosmall __constant_htonl(NFSERR_TOOSMALL)
218#define nfserr_serverfault __constant_htonl(NFSERR_SERVERFAULT)
219#define nfserr_badtype __constant_htonl(NFSERR_BADTYPE)
220#define nfserr_jukebox __constant_htonl(NFSERR_JUKEBOX)
221#define nfserr_denied __constant_htonl(NFSERR_DENIED)
222#define nfserr_deadlock __constant_htonl(NFSERR_DEADLOCK)
223#define nfserr_expired __constant_htonl(NFSERR_EXPIRED)
224#define nfserr_bad_cookie __constant_htonl(NFSERR_BAD_COOKIE)
225#define nfserr_same __constant_htonl(NFSERR_SAME)
226#define nfserr_clid_inuse __constant_htonl(NFSERR_CLID_INUSE)
227#define nfserr_stale_clientid __constant_htonl(NFSERR_STALE_CLIENTID)
228#define nfserr_resource __constant_htonl(NFSERR_RESOURCE)
229#define nfserr_moved __constant_htonl(NFSERR_MOVED)
230#define nfserr_nofilehandle __constant_htonl(NFSERR_NOFILEHANDLE)
231#define nfserr_minor_vers_mismatch __constant_htonl(NFSERR_MINOR_VERS_MISMATCH)
232#define nfserr_share_denied __constant_htonl(NFSERR_SHARE_DENIED)
233#define nfserr_stale_stateid __constant_htonl(NFSERR_STALE_STATEID)
234#define nfserr_old_stateid __constant_htonl(NFSERR_OLD_STATEID)
235#define nfserr_bad_stateid __constant_htonl(NFSERR_BAD_STATEID)
236#define nfserr_bad_seqid __constant_htonl(NFSERR_BAD_SEQID)
237#define nfserr_symlink __constant_htonl(NFSERR_SYMLINK)
238#define nfserr_not_same __constant_htonl(NFSERR_NOT_SAME)
239#define nfserr_restorefh __constant_htonl(NFSERR_RESTOREFH)
240#define nfserr_attrnotsupp __constant_htonl(NFSERR_ATTRNOTSUPP)
241#define nfserr_bad_xdr __constant_htonl(NFSERR_BAD_XDR)
242#define nfserr_openmode __constant_htonl(NFSERR_OPENMODE)
243#define nfserr_locks_held __constant_htonl(NFSERR_LOCKS_HELD)
244#define nfserr_op_illegal __constant_htonl(NFSERR_OP_ILLEGAL)
245#define nfserr_grace __constant_htonl(NFSERR_GRACE)
246#define nfserr_no_grace __constant_htonl(NFSERR_NO_GRACE)
247#define nfserr_reclaim_bad __constant_htonl(NFSERR_RECLAIM_BAD)
248#define nfserr_badname __constant_htonl(NFSERR_BADNAME)
249#define nfserr_cb_path_down __constant_htonl(NFSERR_CB_PATH_DOWN)
250#define nfserr_locked __constant_htonl(NFSERR_LOCKED)
251#define nfserr_wrongsec __constant_htonl(NFSERR_WRONGSEC)
252#define nfserr_replay_me __constant_htonl(NFSERR_REPLAY_ME)
253
254/* error codes for internal use */
255/* if a request fails due to kmalloc failure, it gets dropped.
256 * Client should resend eventually
257 */
258#define nfserr_dropit __constant_htonl(30000)
259/* end-of-file indicator in readdir */
260#define nfserr_eof __constant_htonl(30001)
261
262/* Check for dir entries '.' and '..' */
263#define isdotent(n, l) (l < 3 && n[0] == '.' && (l == 1 || n[1] == '.'))
264
265/*
266 * Time of server startup
267 */
268extern struct timeval nfssvc_boot;
269
270#ifdef CONFIG_NFSD_V4
271
272/* before processing a COMPOUND operation, we have to check that there
273 * is enough space in the buffer for XDR encode to succeed. otherwise,
274 * we might process an operation with side effects, and be unable to
275 * tell the client that the operation succeeded.
276 *
277 * COMPOUND_SLACK_SPACE - this is the minimum bytes of buffer space
278 * needed to encode an "ordinary" _successful_ operation. (GETATTR,
279 * READ, READDIR, and READLINK have their own buffer checks.) if we
280 * fall below this level, we fail the next operation with NFS4ERR_RESOURCE.
281 *
282 * COMPOUND_ERR_SLACK_SPACE - this is the minimum bytes of buffer space
283 * needed to encode an operation which has failed with NFS4ERR_RESOURCE.
284 * care is taken to ensure that we never fall below this level for any
285 * reason.
286 */
287#define COMPOUND_SLACK_SPACE 140 /* OP_GETFH */
288#define COMPOUND_ERR_SLACK_SPACE 12 /* OP_SETATTR */
289
290#define NFSD_LEASE_TIME (nfs4_lease_time())
291#define NFSD_LAUNDROMAT_MINTIMEOUT 10 /* seconds */
292
293/*
294 * The following attributes are currently not supported by the NFSv4 server:
295 * ARCHIVE (deprecated anyway)
296 * HIDDEN (unlikely to be supported any time soon)
297 * MIMETYPE (unlikely to be supported any time soon)
298 * QUOTA_* (will be supported in a forthcoming patch)
299 * SYSTEM (unlikely to be supported any time soon)
300 * TIME_BACKUP (unlikely to be supported any time soon)
301 * TIME_CREATE (unlikely to be supported any time soon)
302 */
303#define NFSD_SUPPORTED_ATTRS_WORD0 \
304(FATTR4_WORD0_SUPPORTED_ATTRS | FATTR4_WORD0_TYPE | FATTR4_WORD0_FH_EXPIRE_TYPE \
305 | FATTR4_WORD0_CHANGE | FATTR4_WORD0_SIZE | FATTR4_WORD0_LINK_SUPPORT \
306 | FATTR4_WORD0_SYMLINK_SUPPORT | FATTR4_WORD0_NAMED_ATTR | FATTR4_WORD0_FSID \
307 | FATTR4_WORD0_UNIQUE_HANDLES | FATTR4_WORD0_LEASE_TIME | FATTR4_WORD0_RDATTR_ERROR \
308 | FATTR4_WORD0_ACLSUPPORT | FATTR4_WORD0_CANSETTIME | FATTR4_WORD0_CASE_INSENSITIVE \
309 | FATTR4_WORD0_CASE_PRESERVING | FATTR4_WORD0_CHOWN_RESTRICTED \
310 | FATTR4_WORD0_FILEHANDLE | FATTR4_WORD0_FILEID | FATTR4_WORD0_FILES_AVAIL \
311 | FATTR4_WORD0_FILES_FREE | FATTR4_WORD0_FILES_TOTAL | FATTR4_WORD0_FS_LOCATIONS | FATTR4_WORD0_HOMOGENEOUS \
312 | FATTR4_WORD0_MAXFILESIZE | FATTR4_WORD0_MAXLINK | FATTR4_WORD0_MAXNAME \
313 | FATTR4_WORD0_MAXREAD | FATTR4_WORD0_MAXWRITE | FATTR4_WORD0_ACL)
314
315#define NFSD_SUPPORTED_ATTRS_WORD1 \
316(FATTR4_WORD1_MODE | FATTR4_WORD1_NO_TRUNC | FATTR4_WORD1_NUMLINKS \
317 | FATTR4_WORD1_OWNER | FATTR4_WORD1_OWNER_GROUP | FATTR4_WORD1_RAWDEV \
318 | FATTR4_WORD1_SPACE_AVAIL | FATTR4_WORD1_SPACE_FREE | FATTR4_WORD1_SPACE_TOTAL \
319 | FATTR4_WORD1_SPACE_USED | FATTR4_WORD1_TIME_ACCESS | FATTR4_WORD1_TIME_ACCESS_SET \
320 | FATTR4_WORD1_TIME_DELTA | FATTR4_WORD1_TIME_METADATA \
321 | FATTR4_WORD1_TIME_MODIFY | FATTR4_WORD1_TIME_MODIFY_SET | FATTR4_WORD1_MOUNTED_ON_FILEID)
322
323/* These will return ERR_INVAL if specified in GETATTR or READDIR. */
324#define NFSD_WRITEONLY_ATTRS_WORD1 \
325(FATTR4_WORD1_TIME_ACCESS_SET | FATTR4_WORD1_TIME_MODIFY_SET)
326
327/* These are the only attrs allowed in CREATE/OPEN/SETATTR. */
328#define NFSD_WRITEABLE_ATTRS_WORD0 \
329(FATTR4_WORD0_SIZE | FATTR4_WORD0_ACL )
330#define NFSD_WRITEABLE_ATTRS_WORD1 \
331(FATTR4_WORD1_MODE | FATTR4_WORD1_OWNER | FATTR4_WORD1_OWNER_GROUP \
332 | FATTR4_WORD1_TIME_ACCESS_SET | FATTR4_WORD1_TIME_MODIFY_SET)
333
334#endif /* CONFIG_NFSD_V4 */
335
336#endif /* LINUX_NFSD_NFSD_H */