FreeBSD/Linux Kernel Cross Reference
sys/sys/mount.h
1 /*
2 * Copyright (c) 1989, 1991, 1993
3 * The Regents of the University of California. All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 * 3. All advertising materials mentioning features or use of this software
14 * must display the following acknowledgement:
15 * This product includes software developed by the University of
16 * California, Berkeley and its contributors.
17 * 4. Neither the name of the University nor the names of its contributors
18 * may be used to endorse or promote products derived from this software
19 * without specific prior written permission.
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 * SUCH DAMAGE.
32 *
33 * @(#)mount.h 8.21 (Berkeley) 5/20/95
34 * $FreeBSD: releng/5.2/sys/sys/mount.h 122537 2003-11-12 08:01:40Z mckusick $
35 */
36
37 #ifndef _SYS_MOUNT_H_
38 #define _SYS_MOUNT_H_
39
40 #include <sys/ucred.h>
41 #include <sys/queue.h>
42 #ifdef _KERNEL
43 #include <sys/lockmgr.h>
44 #include <sys/_lock.h>
45 #include <sys/_mutex.h>
46 #endif
47
48 typedef struct fsid { int32_t val[2]; } fsid_t; /* filesystem id type */
49
50 /*
51 * File identifier.
52 * These are unique per filesystem on a single machine.
53 */
54 #define MAXFIDSZ 16
55
56 struct fid {
57 u_short fid_len; /* length of data in bytes */
58 u_short fid_reserved; /* force longword alignment */
59 char fid_data[MAXFIDSZ]; /* data (variable length) */
60 };
61
62 /*
63 * filesystem statistics
64 */
65 #define MFSNAMELEN 16 /* length of type name including null */
66 #define MNAMELEN 88 /* size of on/from name bufs */
67 #define STATFS_VERSION 0x20030518 /* current version number */
68 struct statfs {
69 uint32_t f_version; /* structure version number */
70 uint32_t f_type; /* type of filesystem */
71 uint64_t f_flags; /* copy of mount exported flags */
72 uint64_t f_bsize; /* filesystem fragment size */
73 uint64_t f_iosize; /* optimal transfer block size */
74 uint64_t f_blocks; /* total data blocks in filesystem */
75 uint64_t f_bfree; /* free blocks in filesystem */
76 int64_t f_bavail; /* free blocks avail to non-superuser */
77 uint64_t f_files; /* total file nodes in filesystem */
78 int64_t f_ffree; /* free nodes avail to non-superuser */
79 uint64_t f_syncwrites; /* count of sync writes since mount */
80 uint64_t f_asyncwrites; /* count of async writes since mount */
81 uint64_t f_syncreads; /* count of sync reads since mount */
82 uint64_t f_asyncreads; /* count of async reads since mount */
83 uint64_t f_spare[10]; /* unused spare */
84 uint32_t f_namemax; /* maximum filename length */
85 uid_t f_owner; /* user that mounted the filesystem */
86 fsid_t f_fsid; /* filesystem id */
87 char f_charspare[80]; /* spare string space */
88 char f_fstypename[MFSNAMELEN]; /* filesystem type name */
89 char f_mntfromname[MNAMELEN]; /* mounted filesystem */
90 char f_mntonname[MNAMELEN]; /* directory on which mounted */
91 };
92
93 #ifdef _KERNEL
94 #define OMFSNAMELEN 16 /* length of fs type name, including null */
95 #define OMNAMELEN (88 - 2 * sizeof(long)) /* size of on/from name bufs */
96
97 /* XXX getfsstat.2 is out of date with write and read counter changes here. */
98 /* XXX statfs.2 is out of date with read counter changes here. */
99 struct ostatfs {
100 long f_spare2; /* placeholder */
101 long f_bsize; /* fundamental filesystem block size */
102 long f_iosize; /* optimal transfer block size */
103 long f_blocks; /* total data blocks in filesystem */
104 long f_bfree; /* free blocks in fs */
105 long f_bavail; /* free blocks avail to non-superuser */
106 long f_files; /* total file nodes in filesystem */
107 long f_ffree; /* free file nodes in fs */
108 fsid_t f_fsid; /* filesystem id */
109 uid_t f_owner; /* user that mounted the filesystem */
110 int f_type; /* type of filesystem */
111 int f_flags; /* copy of mount exported flags */
112 long f_syncwrites; /* count of sync writes since mount */
113 long f_asyncwrites; /* count of async writes since mount */
114 char f_fstypename[OMFSNAMELEN]; /* fs type name */
115 char f_mntonname[OMNAMELEN]; /* directory on which mounted */
116 long f_syncreads; /* count of sync reads since mount */
117 long f_asyncreads; /* count of async reads since mount */
118 short f_spares1; /* unused spare */
119 char f_mntfromname[OMNAMELEN];/* mounted filesystem */
120 short f_spares2; /* unused spare */
121 /*
122 * XXX on machines where longs are aligned to 8-byte boundaries, there
123 * is an unnamed int32_t here. This spare was after the apparent end
124 * of the struct until we bit off the read counters from f_mntonname.
125 */
126 long f_spare[2]; /* unused spare */
127 };
128
129 #define MMAXOPTIONLEN 65536 /* maximum length of a mount option */
130
131 TAILQ_HEAD(vnodelst, vnode);
132 TAILQ_HEAD(vfsoptlist, vfsopt);
133 struct vfsopt {
134 TAILQ_ENTRY(vfsopt) link;
135 char *name;
136 void *value;
137 int len;
138 };
139
140 /*
141 * Structure per mounted filesystem. Each mounted filesystem has an
142 * array of operations and an instance record. The filesystems are
143 * put on a doubly linked list.
144 *
145 * NOTE: mnt_nvnodelist and mnt_reservedvnlist. At the moment vnodes
146 * are linked into mnt_nvnodelist. At some point in the near future the
147 * vnode list will be split into a 'dirty' and 'clean' list. mnt_nvnodelist
148 * will become the dirty list and mnt_reservedvnlist will become the 'clean'
149 * list. Filesystem kld's syncing code should remain compatible since
150 * they only need to scan the dirty vnode list (nvnodelist -> dirtyvnodelist).
151 */
152 struct mount {
153 TAILQ_ENTRY(mount) mnt_list; /* mount list */
154 struct vfsops *mnt_op; /* operations on fs */
155 struct vfsconf *mnt_vfc; /* configuration info */
156 struct vnode *mnt_vnodecovered; /* vnode we mounted on */
157 struct vnode *mnt_syncer; /* syncer vnode */
158 struct vnodelst mnt_nvnodelist; /* list of vnodes this mount */
159 struct vnodelst mnt_reservedvnlist; /* (future) dirty vnode list */
160 struct lock mnt_lock; /* mount structure lock */
161 struct mtx mnt_mtx; /* mount structure interlock */
162 int mnt_writeopcount; /* write syscalls in progress */
163 int mnt_flag; /* flags shared with user */
164 struct vfsoptlist *mnt_opt; /* current mount options */
165 struct vfsoptlist *mnt_optnew; /* new options passed to fs */
166 int mnt_kern_flag; /* kernel only flags */
167 int mnt_maxsymlinklen; /* max size of short symlink */
168 struct statfs mnt_stat; /* cache of filesystem stats */
169 struct ucred *mnt_cred; /* credentials of mounter */
170 qaddr_t mnt_data; /* private data */
171 time_t mnt_time; /* last time written*/
172 int mnt_iosize_max; /* max size for clusters, etc */
173 struct netexport *mnt_export; /* export list */
174 struct label *mnt_mntlabel; /* MAC label for the mount */
175 struct label *mnt_fslabel; /* MAC label for the fs */
176 int mnt_nvnodelistsize; /* # of vnodes on this mount */
177 };
178
179
180 #define MNT_ILOCK(mp) mtx_lock(&(mp)->mnt_mtx)
181 #define MNT_IUNLOCK(mp) mtx_unlock(&(mp)->mnt_mtx)
182
183 #endif /* _KERNEL */
184
185 /*
186 * User specifiable flags.
187 */
188 #define MNT_RDONLY 0x00000001 /* read only filesystem */
189 #define MNT_SYNCHRONOUS 0x00000002 /* filesystem written synchronously */
190 #define MNT_NOEXEC 0x00000004 /* can't exec from filesystem */
191 #define MNT_NOSUID 0x00000008 /* don't honor setuid bits on fs */
192 #define MNT_NODEV 0x00000010 /* don't interpret special files */
193 #define MNT_UNION 0x00000020 /* union with underlying filesystem */
194 #define MNT_ASYNC 0x00000040 /* filesystem written asynchronously */
195 #define MNT_SUIDDIR 0x00100000 /* special handling of SUID on dirs */
196 #define MNT_SOFTDEP 0x00200000 /* soft updates being done */
197 #define MNT_NOSYMFOLLOW 0x00400000 /* do not follow symlinks */
198 #define MNT_JAILDEVFS 0x02000000 /* jail-friendly DEVFS behaviour */
199 #define MNT_MULTILABEL 0x04000000 /* MAC support for individual objects */
200 #define MNT_ACLS 0x08000000 /* ACL support enabled */
201 #define MNT_NOATIME 0x10000000 /* disable update of file access time */
202 #define MNT_NOCLUSTERR 0x40000000 /* disable cluster read */
203 #define MNT_NOCLUSTERW 0x80000000 /* disable cluster write */
204
205 /*
206 * NFS export related mount flags.
207 */
208 #define MNT_EXRDONLY 0x00000080 /* exported read only */
209 #define MNT_EXPORTED 0x00000100 /* filesystem is exported */
210 #define MNT_DEFEXPORTED 0x00000200 /* exported to the world */
211 #define MNT_EXPORTANON 0x00000400 /* use anon uid mapping for everyone */
212 #define MNT_EXKERB 0x00000800 /* exported with Kerberos uid mapping */
213 #define MNT_EXPUBLIC 0x20000000 /* public export (WebNFS) */
214
215 /*
216 * Flags set by internal operations,
217 * but visible to the user.
218 * XXX some of these are not quite right.. (I've never seen the root flag set)
219 */
220 #define MNT_LOCAL 0x00001000 /* filesystem is stored locally */
221 #define MNT_QUOTA 0x00002000 /* quotas are enabled on filesystem */
222 #define MNT_ROOTFS 0x00004000 /* identifies the root filesystem */
223 #define MNT_USER 0x00008000 /* mounted by a user */
224 #define MNT_IGNORE 0x00800000 /* do not show entry in df */
225
226 /*
227 * Mask of flags that are visible to statfs().
228 * XXX I think that this could now become (~(MNT_CMDFLAGS))
229 * but the 'mount' program may need changing to handle this.
230 */
231 #define MNT_VISFLAGMASK (MNT_RDONLY | MNT_SYNCHRONOUS | MNT_NOEXEC | \
232 MNT_NOSUID | MNT_NODEV | MNT_UNION | \
233 MNT_ASYNC | MNT_EXRDONLY | MNT_EXPORTED | \
234 MNT_DEFEXPORTED | MNT_EXPORTANON| MNT_EXKERB | \
235 MNT_LOCAL | MNT_USER | MNT_QUOTA | \
236 MNT_ROOTFS | MNT_NOATIME | MNT_NOCLUSTERR| \
237 MNT_NOCLUSTERW | MNT_SUIDDIR | MNT_SOFTDEP | \
238 MNT_IGNORE | MNT_EXPUBLIC | MNT_NOSYMFOLLOW | \
239 MNT_JAILDEVFS | MNT_MULTILABEL | MNT_ACLS)
240
241 /* Mask of flags that can be updated. */
242 #define MNT_UPDATEMASK (MNT_NOSUID | MNT_NOEXEC | MNT_NODEV | \
243 MNT_SYNCHRONOUS | MNT_UNION | MNT_ASYNC | \
244 MNT_NOATIME | \
245 MNT_NOSYMFOLLOW | MNT_IGNORE | MNT_JAILDEVFS | \
246 MNT_NOCLUSTERR | MNT_NOCLUSTERW | MNT_SUIDDIR | \
247 MNT_ACLS )
248
249 /*
250 * External filesystem command modifier flags.
251 * Unmount can use the MNT_FORCE flag.
252 * XXX These are not STATES and really should be somewhere else.
253 */
254 #define MNT_UPDATE 0x00010000 /* not a real mount, just an update */
255 #define MNT_DELEXPORT 0x00020000 /* delete export host lists */
256 #define MNT_RELOAD 0x00040000 /* reload filesystem data */
257 #define MNT_FORCE 0x00080000 /* force unmount or readonly change */
258 #define MNT_SNAPSHOT 0x01000000 /* snapshot the filesystem */
259 #define MNT_BYFSID 0x08000000 /* specify filesystem by ID. */
260 #define MNT_CMDFLAGS (MNT_UPDATE | MNT_DELEXPORT | MNT_RELOAD | \
261 MNT_FORCE | MNT_SNAPSHOT | MNT_BYFSID)
262 /*
263 * Internal filesystem control flags stored in mnt_kern_flag.
264 *
265 * MNTK_UNMOUNT locks the mount entry so that name lookup cannot proceed
266 * past the mount point. This keeps the subtree stable during mounts
267 * and unmounts.
268 *
269 * MNTK_UNMOUNTF permits filesystems to detect a forced unmount while
270 * dounmount() is still waiting to lock the mountpoint. This allows
271 * the filesystem to cancel operations that might otherwise deadlock
272 * with the unmount attempt (used by NFS).
273 */
274 #define MNTK_UNMOUNTF 0x00000001 /* forced unmount in progress */
275 #define MNTK_UNMOUNT 0x01000000 /* unmount in progress */
276 #define MNTK_MWAIT 0x02000000 /* waiting for unmount to finish */
277 #define MNTK_WANTRDWR 0x04000000 /* upgrade to read/write requested */
278 #define MNTK_SUSPEND 0x08000000 /* request write suspension */
279 #define MNTK_SUSPENDED 0x10000000 /* write operations are suspended */
280
281 /*
282 * Sysctl CTL_VFS definitions.
283 *
284 * Second level identifier specifies which filesystem. Second level
285 * identifier VFS_VFSCONF returns information about all filesystems.
286 * Second level identifier VFS_GENERIC is non-terminal.
287 */
288 #define VFS_VFSCONF 0 /* get configured filesystems */
289 #define VFS_GENERIC 0 /* generic filesystem information */
290 /*
291 * Third level identifiers for VFS_GENERIC are given below; third
292 * level identifiers for specific filesystems are given in their
293 * mount specific header files.
294 */
295 #define VFS_MAXTYPENUM 1 /* int: highest defined filesystem type */
296 #define VFS_CONF 2 /* struct: vfsconf for filesystem given
297 as next argument */
298
299 /*
300 * Flags for various system call interfaces.
301 *
302 * waitfor flags to vfs_sync() and getfsstat()
303 */
304 #define MNT_WAIT 1 /* synchronously wait for I/O to complete */
305 #define MNT_NOWAIT 2 /* start all I/O, but do not wait for it */
306 #define MNT_LAZY 3 /* push data not written by filesystem syncer */
307
308 /*
309 * Generic file handle
310 */
311 struct fhandle {
312 fsid_t fh_fsid; /* Filesystem id of mount point */
313 struct fid fh_fid; /* Filesys specific id */
314 };
315 typedef struct fhandle fhandle_t;
316
317 /*
318 * Export arguments for local filesystem mount calls.
319 */
320 struct export_args {
321 int ex_flags; /* export related flags */
322 uid_t ex_root; /* mapping for root uid */
323 struct xucred ex_anon; /* mapping for anonymous user */
324 struct sockaddr *ex_addr; /* net address to which exported */
325 u_char ex_addrlen; /* and the net address length */
326 struct sockaddr *ex_mask; /* mask of valid bits in saddr */
327 u_char ex_masklen; /* and the smask length */
328 char *ex_indexfile; /* index file for WebNFS URLs */
329 };
330
331 /*
332 * Structure holding information for a publicly exported filesystem
333 * (WebNFS). Currently the specs allow just for one such filesystem.
334 */
335 struct nfs_public {
336 int np_valid; /* Do we hold valid information */
337 fhandle_t np_handle; /* Filehandle for pub fs (internal) */
338 struct mount *np_mount; /* Mountpoint of exported fs */
339 char *np_index; /* Index file */
340 };
341
342 /*
343 * Filesystem configuration information. One of these exists for each
344 * type of filesystem supported by the kernel. These are searched at
345 * mount time to identify the requested filesystem.
346 */
347 struct vfsconf {
348 struct vfsops *vfc_vfsops; /* filesystem operations vector */
349 char vfc_name[MFSNAMELEN]; /* filesystem type name */
350 int vfc_typenum; /* historic filesystem type number */
351 int vfc_refcount; /* number mounted of this type */
352 int vfc_flags; /* permanent flags */
353 struct vfsoptdecl *vfc_opts; /* mount options */
354 struct vfsconf *vfc_next; /* next in list */
355 };
356
357 /* Userland version of the struct vfsconf. */
358 struct xvfsconf {
359 struct vfsops *vfc_vfsops; /* filesystem operations vector */
360 char vfc_name[MFSNAMELEN]; /* filesystem type name */
361 int vfc_typenum; /* historic filesystem type number */
362 int vfc_refcount; /* number mounted of this type */
363 int vfc_flags; /* permanent flags */
364 struct vfsconf *vfc_next; /* next in list */
365 };
366
367 struct ovfsconf {
368 void *vfc_vfsops;
369 char vfc_name[32];
370 int vfc_index;
371 int vfc_refcount;
372 int vfc_flags;
373 };
374
375 /*
376 * NB: these flags refer to IMPLEMENTATION properties, not properties of
377 * any actual mounts; i.e., it does not make sense to change the flags.
378 */
379 #define VFCF_STATIC 0x00010000 /* statically compiled into kernel */
380 #define VFCF_NETWORK 0x00020000 /* may get data over the network */
381 #define VFCF_READONLY 0x00040000 /* writes are not implemented */
382 #define VFCF_SYNTHETIC 0x00080000 /* data does not represent real files */
383 #define VFCF_LOOPBACK 0x00100000 /* aliases some other mounted FS */
384 #define VFCF_UNICODE 0x00200000 /* stores file names as Unicode*/
385
386 struct iovec;
387 struct uio;
388
389 #ifdef _KERNEL
390
391 #ifdef MALLOC_DECLARE
392 MALLOC_DECLARE(M_MOUNT);
393 #endif
394 extern int maxvfsconf; /* highest defined filesystem type */
395 extern int nfs_mount_type; /* vfc_typenum for nfs, or -1 */
396 extern struct vfsconf *vfsconf; /* head of list of filesystem types */
397
398 /*
399 * Operations supported on mounted filesystem.
400 */
401 struct mount_args;
402 struct nameidata;
403
404 typedef int vfs_mount_t(struct mount *mp, char *path, caddr_t data,
405 struct nameidata *ndp, struct thread *td);
406 typedef int vfs_start_t(struct mount *mp, int flags, struct thread *td);
407 typedef int vfs_unmount_t(struct mount *mp, int mntflags, struct thread *td);
408 typedef int vfs_root_t(struct mount *mp, struct vnode **vpp);
409 typedef int vfs_quotactl_t(struct mount *mp, int cmds, uid_t uid,
410 caddr_t arg, struct thread *td);
411 typedef int vfs_statfs_t(struct mount *mp, struct statfs *sbp,
412 struct thread *td);
413 typedef int vfs_sync_t(struct mount *mp, int waitfor, struct ucred *cred,
414 struct thread *td);
415 typedef int vfs_vget_t(struct mount *mp, ino_t ino, int flags,
416 struct vnode **vpp);
417 typedef int vfs_fhtovp_t(struct mount *mp, struct fid *fhp, struct vnode **vpp);
418 typedef int vfs_checkexp_t(struct mount *mp, struct sockaddr *nam,
419 int *extflagsp, struct ucred **credanonp);
420 typedef int vfs_vptofh_t(struct vnode *vp, struct fid *fhp);
421 typedef int vfs_init_t(struct vfsconf *);
422 typedef int vfs_uninit_t(struct vfsconf *);
423 typedef int vfs_extattrctl_t(struct mount *mp, int cmd,
424 struct vnode *filename_vp, int attrnamespace,
425 const char *attrname, struct thread *td);
426 typedef int vfs_nmount_t(struct mount *mp, struct nameidata *ndp,
427 struct thread *td);
428
429 struct vfsops {
430 vfs_mount_t *vfs_mount;
431 vfs_start_t *vfs_start;
432 vfs_unmount_t *vfs_unmount;
433 vfs_root_t *vfs_root;
434 vfs_quotactl_t *vfs_quotactl;
435 vfs_statfs_t *vfs_statfs;
436 vfs_sync_t *vfs_sync;
437 vfs_vget_t *vfs_vget;
438 vfs_fhtovp_t *vfs_fhtovp;
439 vfs_checkexp_t *vfs_checkexp;
440 vfs_vptofh_t *vfs_vptofh;
441 vfs_init_t *vfs_init;
442 vfs_uninit_t *vfs_uninit;
443 vfs_extattrctl_t *vfs_extattrctl;
444 /* Additions below are not binary compatible with 5.0 and below. */
445 vfs_nmount_t *vfs_nmount;
446 };
447
448 #define VFS_NMOUNT(MP, NDP, P) (*(MP)->mnt_op->vfs_nmount)(MP, NDP, P)
449 #define VFS_MOUNT(MP, PATH, DATA, NDP, P) \
450 (*(MP)->mnt_op->vfs_mount)(MP, PATH, DATA, NDP, P)
451 #define VFS_START(MP, FLAGS, P) (*(MP)->mnt_op->vfs_start)(MP, FLAGS, P)
452 #define VFS_UNMOUNT(MP, FORCE, P) (*(MP)->mnt_op->vfs_unmount)(MP, FORCE, P)
453 #define VFS_ROOT(MP, VPP) (*(MP)->mnt_op->vfs_root)(MP, VPP)
454 #define VFS_QUOTACTL(MP,C,U,A,P) (*(MP)->mnt_op->vfs_quotactl)(MP, C, U, A, P)
455 #define VFS_STATFS(MP, SBP, P) (*(MP)->mnt_op->vfs_statfs)(MP, SBP, P)
456 #define VFS_SYNC(MP, WAIT, C, P) (*(MP)->mnt_op->vfs_sync)(MP, WAIT, C, P)
457 #define VFS_VGET(MP, INO, FLAGS, VPP) \
458 (*(MP)->mnt_op->vfs_vget)(MP, INO, FLAGS, VPP)
459 #define VFS_FHTOVP(MP, FIDP, VPP) \
460 (*(MP)->mnt_op->vfs_fhtovp)(MP, FIDP, VPP)
461 #define VFS_VPTOFH(VP, FIDP) (*(VP)->v_mount->mnt_op->vfs_vptofh)(VP, FIDP)
462 #define VFS_CHECKEXP(MP, NAM, EXFLG, CRED) \
463 (*(MP)->mnt_op->vfs_checkexp)(MP, NAM, EXFLG, CRED)
464 #define VFS_EXTATTRCTL(MP, C, FN, NS, N, P) \
465 (*(MP)->mnt_op->vfs_extattrctl)(MP, C, FN, NS, N, P)
466
467 #include <sys/module.h>
468
469 #define VFS_SET(vfsops, fsname, flags) \
470 static struct vfsconf fsname ## _vfsconf = { \
471 &vfsops, \
472 #fsname, \
473 -1, \
474 0, \
475 flags \
476 }; \
477 static moduledata_t fsname ## _mod = { \
478 #fsname, \
479 vfs_modevent, \
480 & fsname ## _vfsconf \
481 }; \
482 DECLARE_MODULE(fsname, fsname ## _mod, SI_SUB_VFS, SI_ORDER_MIDDLE)
483
484 extern char *mountrootfsname;
485
486 /*
487 * exported vnode operations
488 */
489 int dounmount(struct mount *, int, struct thread *td);
490 int kernel_mount(struct iovec *iovp, unsigned int iovcnt, int flags);
491 int kernel_vmount(int flags, ...);
492 int vfs_getopt(struct vfsoptlist *, const char *, void **, int *);
493 int vfs_copyopt(struct vfsoptlist *, const char *, void *, int);
494 int vfs_mount(struct thread *td, const char *type, char *path,
495 int flags, void *data);
496 int vfs_setpublicfs /* set publicly exported fs */
497 (struct mount *, struct netexport *, struct export_args *);
498 int vfs_lock(struct mount *); /* lock a vfs */
499 void vfs_msync(struct mount *, int);
500 void vfs_unlock(struct mount *); /* unlock a vfs */
501 int vfs_busy(struct mount *, int, struct mtx *, struct thread *td);
502 int vfs_export /* process mount export info */
503 (struct mount *, struct export_args *);
504 struct netcred *vfs_export_lookup /* lookup host in fs export list */
505 (struct mount *, struct sockaddr *);
506 int vfs_allocate_syncvnode(struct mount *);
507 void vfs_getnewfsid(struct mount *);
508 dev_t vfs_getrootfsid(struct mount *);
509 struct mount *vfs_getvfs(fsid_t *); /* return vfs given fsid */
510 int vfs_modevent(module_t, int, void *);
511 int vfs_mountedon(struct vnode *); /* is a vfs mounted on vp */
512 void vfs_mountroot(void); /* mount our root filesystem */
513 int vfs_rootmountalloc(char *, char *, struct mount **);
514 void vfs_mount_destroy(struct mount *, struct thread *);
515 void vfs_unbusy(struct mount *, struct thread *td);
516 void vfs_unmountall(void);
517 int vfs_register(struct vfsconf *);
518 int vfs_unregister(struct vfsconf *);
519 extern TAILQ_HEAD(mntlist, mount) mountlist; /* mounted filesystem list */
520 extern struct mtx mountlist_mtx;
521 extern struct nfs_public nfs_pub;
522
523 /*
524 * Declarations for these vfs default operations are located in
525 * kern/vfs_default.c, they should be used instead of making "dummy"
526 * functions or casting entries in the VFS op table to "enopnotsupp()".
527 */
528 vfs_start_t vfs_stdstart;
529 vfs_root_t vfs_stdroot;
530 vfs_quotactl_t vfs_stdquotactl;
531 vfs_statfs_t vfs_stdstatfs;
532 vfs_sync_t vfs_stdsync;
533 vfs_sync_t vfs_stdnosync;
534 vfs_vget_t vfs_stdvget;
535 vfs_fhtovp_t vfs_stdfhtovp;
536 vfs_checkexp_t vfs_stdcheckexp;
537 vfs_vptofh_t vfs_stdvptofh;
538 vfs_init_t vfs_stdinit;
539 vfs_uninit_t vfs_stduninit;
540 vfs_extattrctl_t vfs_stdextattrctl;
541
542 /* XXX - these should be indirect functions!!! */
543 int softdep_fsync(struct vnode *);
544 int softdep_process_worklist(struct mount *);
545
546 #else /* !_KERNEL */
547
548 #include <sys/cdefs.h>
549
550 struct stat;
551
552 __BEGIN_DECLS
553 int fhopen(const struct fhandle *, int);
554 int fhstat(const struct fhandle *, struct stat *);
555 int fhstatfs(const struct fhandle *, struct statfs *);
556 int fstatfs(int, struct statfs *);
557 int getfh(const char *, fhandle_t *);
558 int getfsstat(struct statfs *, long, int);
559 int getmntinfo(struct statfs **, int);
560 int mount(const char *, const char *, int, void *);
561 int nmount(struct iovec *, u_int, int);
562 int statfs(const char *, struct statfs *);
563 int unmount(const char *, int);
564
565 /* C library stuff */
566 void endvfsent(void);
567 struct ovfsconf *getvfsbytype(int);
568 struct ovfsconf *getvfsent(void);
569 int getvfsbyname(const char *, struct xvfsconf *);
570 void setvfsent(int);
571 int vfsisloadable(const char *);
572 int vfsload(const char *);
573 __END_DECLS
574
575 #endif /* _KERNEL */
576
577 #endif /* !_SYS_MOUNT_H_ */
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