2 * linux/include/linux/nfsd/nfsd.h
4 * Hodge-podge collection of knfsd-related stuff.
5 * I will sort this out later.
7 * Copyright (C) 1995-1997 Olaf Kirch <okir@monad.swb.de>
10 #ifndef LINUX_NFSD_NFSD_H
11 #define LINUX_NFSD_NFSD_H
13 #include <linux/types.h>
14 #include <linux/unistd.h>
15 #include <linux/dirent.h>
17 #include <linux/posix_acl.h>
18 #include <linux/mount.h>
20 #include <linux/nfsd/debug.h>
21 #include <linux/nfsd/nfsfh.h>
22 #include <linux/nfsd/export.h>
23 #include <linux/nfsd/auth.h>
24 #include <linux/nfsd/stats.h>
25 #include <linux/nfsd/interface.h>
29 #define NFSD_VERSION "0.5"
30 #define NFSD_SUPPORTED_MINOR_VERSION 0
34 * Special flags for nfsd_permission. These must be different from MAY_READ,
35 * MAY_WRITE, and MAY_EXEC.
41 #define MAY_OWNER_OVERRIDE 64
42 #define MAY_LOCAL_ACCESS 128 /* IRIX doing local access check on device special file*/
43 #if (MAY_SATTR | MAY_TRUNC | MAY_LOCK | MAY_OWNER_OVERRIDE | MAY_LOCAL_ACCESS) & (MAY_READ | MAY_WRITE | MAY_EXEC)
44 # error "please use a different value for MAY_SATTR or MAY_TRUNC or MAY_LOCK or MAY_LOCAL_ACCESS or MAY_OWNER_OVERRIDE."
46 #define MAY_CREATE (MAY_EXEC|MAY_WRITE)
47 #define MAY_REMOVE (MAY_EXEC|MAY_WRITE|MAY_TRUNC)
50 * Callback function for readdir
53 __be32 err; /* 0, nfserr, or nfserr_eof */
55 typedef int (*encode_dent_fn)(struct readdir_cd *, const char *,
56 int, loff_t, ino_t, unsigned int);
57 typedef int (*nfsd_dirop_t)(struct inode *, struct dentry *, int, int);
59 extern struct svc_program nfsd_program;
60 extern struct svc_version nfsd_version2, nfsd_version3,
62 extern struct svc_serv *nfsd_serv;
64 * Function prototypes.
66 int nfsd_svc(unsigned short port, int nrservs);
67 int nfsd_dispatch(struct svc_rqst *rqstp, __be32 *statp);
70 int fh_lock_parent(struct svc_fh *, struct dentry *);
71 int nfsd_racache_init(int);
72 void nfsd_racache_shutdown(void);
73 int nfsd_cross_mnt(struct svc_rqst *rqstp, struct dentry **dpp,
74 struct svc_export **expp);
75 __be32 nfsd_lookup(struct svc_rqst *, struct svc_fh *,
76 const char *, int, struct svc_fh *);
77 __be32 nfsd_setattr(struct svc_rqst *, struct svc_fh *,
78 struct iattr *, int, time_t);
80 __be32 nfsd4_set_nfs4_acl(struct svc_rqst *, struct svc_fh *,
82 int nfsd4_get_nfs4_acl(struct svc_rqst *, struct dentry *, struct nfs4_acl **);
83 #endif /* CONFIG_NFSD_V4 */
84 __be32 nfsd_create(struct svc_rqst *, struct svc_fh *,
85 char *name, int len, struct iattr *attrs,
86 int type, dev_t rdev, struct svc_fh *res);
88 __be32 nfsd_access(struct svc_rqst *, struct svc_fh *, u32 *, u32 *);
89 __be32 nfsd_create_v3(struct svc_rqst *, struct svc_fh *,
90 char *name, int len, struct iattr *attrs,
91 struct svc_fh *res, int createmode,
92 u32 *verifier, int *truncp, int *created);
93 __be32 nfsd_commit(struct svc_rqst *, struct svc_fh *,
94 loff_t, unsigned long);
95 #endif /* CONFIG_NFSD_V3 */
96 __be32 nfsd_open(struct svc_rqst *, struct svc_fh *, int,
98 void nfsd_close(struct file *);
99 __be32 nfsd_read(struct svc_rqst *, struct svc_fh *, struct file *,
100 loff_t, struct kvec *, int, unsigned long *);
101 __be32 nfsd_write(struct svc_rqst *, struct svc_fh *,struct file *,
102 loff_t, struct kvec *,int, unsigned long, int *);
103 __be32 nfsd_readlink(struct svc_rqst *, struct svc_fh *,
105 __be32 nfsd_symlink(struct svc_rqst *, struct svc_fh *,
106 char *name, int len, char *path, int plen,
107 struct svc_fh *res, struct iattr *);
108 __be32 nfsd_link(struct svc_rqst *, struct svc_fh *,
109 char *, int, struct svc_fh *);
110 __be32 nfsd_rename(struct svc_rqst *,
111 struct svc_fh *, char *, int,
112 struct svc_fh *, char *, int);
113 __be32 nfsd_remove(struct svc_rqst *,
114 struct svc_fh *, char *, int);
115 __be32 nfsd_unlink(struct svc_rqst *, struct svc_fh *, int type,
116 char *name, int len);
117 int nfsd_truncate(struct svc_rqst *, struct svc_fh *,
119 __be32 nfsd_readdir(struct svc_rqst *, struct svc_fh *,
120 loff_t *, struct readdir_cd *, encode_dent_fn);
121 __be32 nfsd_statfs(struct svc_rqst *, struct svc_fh *,
124 int nfsd_notify_change(struct inode *, struct iattr *);
125 __be32 nfsd_permission(struct svc_export *, struct dentry *, int);
126 int nfsd_sync_dir(struct dentry *dp);
128 #if defined(CONFIG_NFSD_V2_ACL) || defined(CONFIG_NFSD_V3_ACL)
129 #ifdef CONFIG_NFSD_V2_ACL
130 extern struct svc_version nfsd_acl_version2;
132 #define nfsd_acl_version2 NULL
134 #ifdef CONFIG_NFSD_V3_ACL
135 extern struct svc_version nfsd_acl_version3;
137 #define nfsd_acl_version3 NULL
139 struct posix_acl *nfsd_get_posix_acl(struct svc_fh *, int);
140 int nfsd_set_posix_acl(struct svc_fh *, int, struct posix_acl *);
143 enum vers_op {NFSD_SET, NFSD_CLEAR, NFSD_TEST, NFSD_AVAIL };
144 int nfsd_vers(int vers, enum vers_op change);
145 void nfsd_reset_versions(void);
146 int nfsd_create_serv(void);
148 extern int nfsd_max_blksize;
153 #ifdef CONFIG_NFSD_V4
154 void nfs4_state_init(void);
155 int nfs4_state_start(void);
156 void nfs4_state_shutdown(void);
157 time_t nfs4_lease_time(void);
158 void nfs4_reset_lease(time_t leasetime);
159 int nfs4_reset_recoverydir(char *recdir);
161 static inline void nfs4_state_init(void){};
162 static inline int nfs4_state_start(void){return 0;}
163 static inline void nfs4_state_shutdown(void){}
164 static inline time_t nfs4_lease_time(void){return 0;}
165 static inline void nfs4_reset_lease(time_t leasetime){}
166 static inline int nfs4_reset_recoverydir(char *recdir) {return 0;}
172 void nfsd_lockd_init(void);
173 void nfsd_lockd_shutdown(void);
177 * These macros provide pre-xdr'ed values for faster operation.
179 #define nfs_ok __constant_htonl(NFS_OK)
180 #define nfserr_perm __constant_htonl(NFSERR_PERM)
181 #define nfserr_noent __constant_htonl(NFSERR_NOENT)
182 #define nfserr_io __constant_htonl(NFSERR_IO)
183 #define nfserr_nxio __constant_htonl(NFSERR_NXIO)
184 #define nfserr_eagain __constant_htonl(NFSERR_EAGAIN)
185 #define nfserr_acces __constant_htonl(NFSERR_ACCES)
186 #define nfserr_exist __constant_htonl(NFSERR_EXIST)
187 #define nfserr_xdev __constant_htonl(NFSERR_XDEV)
188 #define nfserr_nodev __constant_htonl(NFSERR_NODEV)
189 #define nfserr_notdir __constant_htonl(NFSERR_NOTDIR)
190 #define nfserr_isdir __constant_htonl(NFSERR_ISDIR)
191 #define nfserr_inval __constant_htonl(NFSERR_INVAL)
192 #define nfserr_fbig __constant_htonl(NFSERR_FBIG)
193 #define nfserr_nospc __constant_htonl(NFSERR_NOSPC)
194 #define nfserr_rofs __constant_htonl(NFSERR_ROFS)
195 #define nfserr_mlink __constant_htonl(NFSERR_MLINK)
196 #define nfserr_opnotsupp __constant_htonl(NFSERR_OPNOTSUPP)
197 #define nfserr_nametoolong __constant_htonl(NFSERR_NAMETOOLONG)
198 #define nfserr_notempty __constant_htonl(NFSERR_NOTEMPTY)
199 #define nfserr_dquot __constant_htonl(NFSERR_DQUOT)
200 #define nfserr_stale __constant_htonl(NFSERR_STALE)
201 #define nfserr_remote __constant_htonl(NFSERR_REMOTE)
202 #define nfserr_wflush __constant_htonl(NFSERR_WFLUSH)
203 #define nfserr_badhandle __constant_htonl(NFSERR_BADHANDLE)
204 #define nfserr_notsync __constant_htonl(NFSERR_NOT_SYNC)
205 #define nfserr_badcookie __constant_htonl(NFSERR_BAD_COOKIE)
206 #define nfserr_notsupp __constant_htonl(NFSERR_NOTSUPP)
207 #define nfserr_toosmall __constant_htonl(NFSERR_TOOSMALL)
208 #define nfserr_serverfault __constant_htonl(NFSERR_SERVERFAULT)
209 #define nfserr_badtype __constant_htonl(NFSERR_BADTYPE)
210 #define nfserr_jukebox __constant_htonl(NFSERR_JUKEBOX)
211 #define nfserr_denied __constant_htonl(NFSERR_DENIED)
212 #define nfserr_deadlock __constant_htonl(NFSERR_DEADLOCK)
213 #define nfserr_expired __constant_htonl(NFSERR_EXPIRED)
214 #define nfserr_bad_cookie __constant_htonl(NFSERR_BAD_COOKIE)
215 #define nfserr_same __constant_htonl(NFSERR_SAME)
216 #define nfserr_clid_inuse __constant_htonl(NFSERR_CLID_INUSE)
217 #define nfserr_stale_clientid __constant_htonl(NFSERR_STALE_CLIENTID)
218 #define nfserr_resource __constant_htonl(NFSERR_RESOURCE)
219 #define nfserr_moved __constant_htonl(NFSERR_MOVED)
220 #define nfserr_nofilehandle __constant_htonl(NFSERR_NOFILEHANDLE)
221 #define nfserr_minor_vers_mismatch __constant_htonl(NFSERR_MINOR_VERS_MISMATCH)
222 #define nfserr_share_denied __constant_htonl(NFSERR_SHARE_DENIED)
223 #define nfserr_stale_stateid __constant_htonl(NFSERR_STALE_STATEID)
224 #define nfserr_old_stateid __constant_htonl(NFSERR_OLD_STATEID)
225 #define nfserr_bad_stateid __constant_htonl(NFSERR_BAD_STATEID)
226 #define nfserr_bad_seqid __constant_htonl(NFSERR_BAD_SEQID)
227 #define nfserr_symlink __constant_htonl(NFSERR_SYMLINK)
228 #define nfserr_not_same __constant_htonl(NFSERR_NOT_SAME)
229 #define nfserr_restorefh __constant_htonl(NFSERR_RESTOREFH)
230 #define nfserr_attrnotsupp __constant_htonl(NFSERR_ATTRNOTSUPP)
231 #define nfserr_bad_xdr __constant_htonl(NFSERR_BAD_XDR)
232 #define nfserr_openmode __constant_htonl(NFSERR_OPENMODE)
233 #define nfserr_locks_held __constant_htonl(NFSERR_LOCKS_HELD)
234 #define nfserr_op_illegal __constant_htonl(NFSERR_OP_ILLEGAL)
235 #define nfserr_grace __constant_htonl(NFSERR_GRACE)
236 #define nfserr_no_grace __constant_htonl(NFSERR_NO_GRACE)
237 #define nfserr_reclaim_bad __constant_htonl(NFSERR_RECLAIM_BAD)
238 #define nfserr_badname __constant_htonl(NFSERR_BADNAME)
239 #define nfserr_cb_path_down __constant_htonl(NFSERR_CB_PATH_DOWN)
240 #define nfserr_locked __constant_htonl(NFSERR_LOCKED)
241 #define nfserr_replay_me __constant_htonl(NFSERR_REPLAY_ME)
243 /* error codes for internal use */
244 /* if a request fails due to kmalloc failure, it gets dropped.
245 * Client should resend eventually
247 #define nfserr_dropit __constant_htonl(30000)
248 /* end-of-file indicator in readdir */
249 #define nfserr_eof __constant_htonl(30001)
251 /* Check for dir entries '.' and '..' */
252 #define isdotent(n, l) (l < 3 && n[0] == '.' && (l == 1 || n[1] == '.'))
255 * Time of server startup
257 extern struct timeval nfssvc_boot;
259 static inline int is_fsid(struct svc_fh *fh, struct knfsd_fh *reffh)
261 if (fh->fh_export->ex_flags & NFSEXP_FSID) {
262 struct vfsmount *mnt = fh->fh_export->ex_mnt;
263 if (!old_valid_dev(mnt->mnt_sb->s_dev) ||
264 (reffh->fh_version == 1 && reffh->fh_fsid_type == 1))
271 #ifdef CONFIG_NFSD_V4
273 /* before processing a COMPOUND operation, we have to check that there
274 * is enough space in the buffer for XDR encode to succeed. otherwise,
275 * we might process an operation with side effects, and be unable to
276 * tell the client that the operation succeeded.
278 * COMPOUND_SLACK_SPACE - this is the minimum amount of buffer space
279 * needed to encode an "ordinary" _successful_ operation. (GETATTR,
280 * READ, READDIR, and READLINK have their own buffer checks.) if we
281 * fall below this level, we fail the next operation with NFS4ERR_RESOURCE.
283 * COMPOUND_ERR_SLACK_SPACE - this is the minimum amount of buffer space
284 * needed to encode an operation which has failed with NFS4ERR_RESOURCE.
285 * care is taken to ensure that we never fall below this level for any
288 #define COMPOUND_SLACK_SPACE 140 /* OP_GETFH */
289 #define COMPOUND_ERR_SLACK_SPACE 12 /* OP_SETATTR */
291 #define NFSD_LEASE_TIME (nfs4_lease_time())
292 #define NFSD_LAUNDROMAT_MINTIMEOUT 10 /* seconds */
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)
304 #define NFSD_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)
316 #define NFSD_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)
324 /* These will return ERR_INVAL if specified in GETATTR or READDIR. */
325 #define NFSD_WRITEONLY_ATTRS_WORD1 \
326 (FATTR4_WORD1_TIME_ACCESS_SET | FATTR4_WORD1_TIME_MODIFY_SET)
328 /* These are the only attrs allowed in CREATE/OPEN/SETATTR. */
329 #define NFSD_WRITEABLE_ATTRS_WORD0 \
330 (FATTR4_WORD0_SIZE | FATTR4_WORD0_ACL )
331 #define NFSD_WRITEABLE_ATTRS_WORD1 \
332 (FATTR4_WORD1_MODE | FATTR4_WORD1_OWNER | FATTR4_WORD1_OWNER_GROUP \
333 | FATTR4_WORD1_TIME_ACCESS_SET | FATTR4_WORD1_TIME_METADATA | FATTR4_WORD1_TIME_MODIFY_SET)
335 #endif /* CONFIG_NFSD_V4 */
337 #endif /* __KERNEL__ */
339 #endif /* LINUX_NFSD_NFSD_H */