FreeBSD/Linux Kernel Cross Reference
sys/sys/mount.h
1 /* $NetBSD: mount.h,v 1.118 2003/12/04 19:38:25 atatat Exp $ */
2
3 /*
4 * Copyright (c) 1989, 1991, 1993
5 * The Regents of the University of California. All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 * 3. Neither the name of the University nor the names of its contributors
16 * may be used to endorse or promote products derived from this software
17 * without specific prior written permission.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
22 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29 * SUCH DAMAGE.
30 *
31 * @(#)mount.h 8.21 (Berkeley) 5/20/95
32 */
33
34 #ifndef _SYS_MOUNT_H_
35 #define _SYS_MOUNT_H_
36
37 #ifdef _KERNEL_OPT
38 #include "opt_compat_43.h"
39 #endif
40
41 #ifndef _KERNEL
42 #include <sys/featuretest.h>
43 #include <sys/ucred.h>
44 #if defined(_NETBSD_SOURCE)
45 #include <sys/stat.h>
46 #endif /* _NETBSD_SOURCE */
47 #endif
48 #include <sys/queue.h>
49 #include <sys/lock.h>
50
51 typedef struct { int32_t val[2]; } fsid_t; /* file system id type */
52
53 /*
54 * File identifier.
55 * These are unique per filesystem on a single machine.
56 */
57 #define MAXFIDSZ 16
58
59 struct fid {
60 u_short fid_len; /* length of data in bytes */
61 u_short fid_reserved; /* force longword alignment */
62 char fid_data[MAXFIDSZ]; /* data (variable length) */
63 };
64
65 /*
66 * file system statistics
67 */
68
69 #define MFSNAMELEN 16 /* length of fs type name, including nul */
70 #define MNAMELEN 90 /* length of buffer for returned name */
71
72 struct statfs {
73 short f_type; /* type of file system */
74 u_short f_oflags; /* deprecated copy of mount flags */
75 long f_bsize; /* fundamental file system block size */
76 long f_iosize; /* optimal transfer block size */
77 long f_blocks; /* total data blocks in file system */
78 long f_bfree; /* free blocks in fs */
79 long f_bavail; /* free blocks avail to non-superuser */
80 long f_files; /* total file nodes in file system */
81 long f_ffree; /* free file nodes in fs */
82 fsid_t f_fsid; /* file system id */
83 uid_t f_owner; /* user that mounted the file system */
84 long f_flags; /* copy of mount flags */
85 long f_syncwrites; /* count of sync writes since mount */
86 long f_asyncwrites; /* count of async writes since mount */
87 long f_spare[1]; /* spare for later */
88 char f_fstypename[MFSNAMELEN]; /* fs type name */
89 char f_mntonname[MNAMELEN]; /* directory on which mounted */
90 char f_mntfromname[MNAMELEN]; /* mounted file system */
91 };
92
93 /*
94 * File system types.
95 */
96 #define MOUNT_FFS "ffs" /* UNIX "Fast" Filesystem */
97 #define MOUNT_UFS MOUNT_FFS /* for compatibility */
98 #define MOUNT_NFS "nfs" /* Network Filesystem */
99 #define MOUNT_MFS "mfs" /* Memory Filesystem */
100 #define MOUNT_MSDOS "msdos" /* MSDOS Filesystem */
101 #define MOUNT_LFS "lfs" /* Log-based Filesystem */
102 #define MOUNT_FDESC "fdesc" /* File Descriptor Filesystem */
103 #define MOUNT_PORTAL "portal" /* Portal Filesystem */
104 #define MOUNT_NULL "null" /* Minimal Filesystem Layer */
105 #define MOUNT_OVERLAY "overlay" /* Minimal Overlay Filesystem Layer */
106 #define MOUNT_UMAP "umap" /* User/Group Identifier Remapping Filesystem */
107 #define MOUNT_KERNFS "kernfs" /* Kernel Information Filesystem */
108 #define MOUNT_PROCFS "procfs" /* /proc Filesystem */
109 #define MOUNT_AFS "afs" /* Andrew Filesystem */
110 #define MOUNT_CD9660 "cd9660" /* ISO9660 (aka CDROM) Filesystem */
111 #define MOUNT_UNION "union" /* Union (translucent) Filesystem */
112 #define MOUNT_ADOSFS "adosfs" /* AmigaDOS Filesystem */
113 #define MOUNT_EXT2FS "ext2fs" /* Second Extended Filesystem */
114 #define MOUNT_CFS "coda" /* Coda Filesystem */
115 #define MOUNT_CODA "coda" /* Coda Filesystem */
116 #define MOUNT_FILECORE "filecore" /* Acorn Filecore Filesystem */
117 #define MOUNT_NTFS "ntfs" /* Windows/NT Filesystem */
118 #define MOUNT_SMBFS "smbfs" /* CIFS (SMB) */
119
120 /*
121 * Structure per mounted file system. Each mounted file system has an
122 * array of operations and an instance record. The file systems are
123 * put on a doubly linked list.
124 */
125 LIST_HEAD(vnodelst, vnode);
126
127 struct mount {
128 CIRCLEQ_ENTRY(mount) mnt_list; /* mount list */
129 struct vfsops *mnt_op; /* operations on fs */
130 struct vnode *mnt_vnodecovered; /* vnode we mounted on */
131 struct vnode *mnt_syncer; /* syncer vnode */
132 struct vnodelst mnt_vnodelist; /* list of vnodes this mount */
133 struct lock mnt_lock; /* mount structure lock */
134 int mnt_flag; /* flags */
135 int mnt_iflag; /* internal flags */
136 int mnt_maxsymlinklen; /* max size of short symlink */
137 int mnt_fs_bshift; /* offset shift for lblkno */
138 int mnt_dev_bshift; /* shift for device sectors */
139 struct statfs mnt_stat; /* cache of filesystem stats */
140 void *mnt_data; /* private data */
141 int mnt_wcnt; /* count of vfs_busy waiters */
142 struct proc *mnt_unmounter; /* who is unmounting */
143 int mnt_writeopcountupper; /* upper writeops in progress */
144 int mnt_writeopcountlower; /* lower writeops in progress */
145 };
146
147 /*
148 * Mount flags. XXX BEWARE: these are not in numerical order!
149 *
150 * Unmount uses MNT_FORCE flag.
151 *
152 * Note that all mount flags are listed here. if you need to add one, take
153 * one of the __MNT_UNUSED flags.
154 */
155
156 #define __MNT_UNUSED3 0x00800000
157 #define __MNT_UNUSED4 0x00200000
158 #define __MNT_UNUSED5 0x01000000
159 #define __MNT_UNUSED6 0x02000000
160
161 #define MNT_RDONLY 0x00000001 /* read only filesystem */
162 #define MNT_SYNCHRONOUS 0x00000002 /* file system written synchronously */
163 #define MNT_NOEXEC 0x00000004 /* can't exec from filesystem */
164 #define MNT_NOSUID 0x00000008 /* don't honor setuid bits on fs */
165 #define MNT_NODEV 0x00000010 /* don't interpret special files */
166 #define MNT_UNION 0x00000020 /* union with underlying filesystem */
167 #define MNT_ASYNC 0x00000040 /* file system written asynchronously */
168 #define MNT_NOCOREDUMP 0x00008000 /* don't write core dumps to this FS */
169 #define MNT_IGNORE 0x00100000 /* don't show entry in df */
170 #define MNT_NOATIME 0x04000000 /* Never update access times in fs */
171 #define MNT_SYMPERM 0x20000000 /* recognize symlink permission */
172 #define MNT_NODEVMTIME 0x40000000 /* Never update mod times for devs */
173 #define MNT_SOFTDEP 0x80000000 /* Use soft dependencies */
174
175 #define __MNT_BASIC_FLAGS \
176 { MNT_RDONLY, 0, "read-only" }, \
177 { MNT_SYNCHRONOUS, 0, "synchronous" }, \
178 { MNT_NOEXEC, 0, "noexec" }, \
179 { MNT_NOSUID, 0, "nosuid" }, \
180 { MNT_NODEV, 0, "nodev" }, \
181 { MNT_UNION, 0, "union" }, \
182 { MNT_ASYNC, 0, "asynchronous" }, \
183 { MNT_NOCOREDUMP, 0, "nocoredump" }, \
184 { MNT_IGNORE, 0, "hidden" }, \
185 { MNT_NOATIME, 0, "noatime" }, \
186 { MNT_SYMPERM, 0, "symperm" }, \
187 { MNT_NODEVMTIME, 0, "nodevmtime" }, \
188 { MNT_SOFTDEP, 0, "soft dependencies" },
189
190 /*
191 * exported mount flags.
192 */
193 #define MNT_EXRDONLY 0x00000080 /* exported read only */
194 #define MNT_EXPORTED 0x00000100 /* file system is exported */
195 #define MNT_DEFEXPORTED 0x00000200 /* exported to the world */
196 #define MNT_EXPORTANON 0x00000400 /* use anon uid mapping for everyone */
197 #define MNT_EXKERB 0x00000800 /* exported with Kerberos uid mapping */
198 #define MNT_EXNORESPORT 0x08000000 /* don't enforce reserved ports (NFS) */
199 #define MNT_EXPUBLIC 0x10000000 /* public export (WebNFS) */
200
201 #define __MNT_EXPORTED_FLAGS \
202 { MNT_EXRDONLY, 1, "exported read-only" }, \
203 { MNT_EXPORTED, 0, "NFS exported" }, \
204 { MNT_DEFEXPORTED, 1, "exported to the world" }, \
205 { MNT_EXPORTANON, 1, "anon uid mapping" }, \
206 { MNT_EXKERB, 1, "kerberos uid mapping" }, \
207 { MNT_EXNORESPORT, 0, "non-reserved ports" }, \
208 { MNT_EXPUBLIC, 0, "WebNFS exports" },
209
210 /*
211 * Flags set by internal operations.
212 */
213 #define MNT_LOCAL 0x00001000 /* filesystem is stored locally */
214 #define MNT_QUOTA 0x00002000 /* quotas are enabled on filesystem */
215 #define MNT_ROOTFS 0x00004000 /* identifies the root filesystem */
216
217 #define __MNT_INTERNAL_FLAGS \
218 { MNT_LOCAL, 0, "local" }, \
219 { MNT_QUOTA, 0, "with quotas" }, \
220 { MNT_ROOTFS, 1, "root file system" },
221
222 /*
223 * Mask of flags that are visible to statfs()
224 */
225 #define MNT_VISFLAGMASK \
226 (MNT_SOFTDEP | MNT_NODEVMTIME | MNT_SYMPERM | MNT_EXPUBLIC | \
227 MNT_EXNORESPORT | MNT_NOATIME | \
228 MNT_IGNORE | \
229 MNT_NOCOREDUMP | MNT_ROOTFS | MNT_QUOTA | MNT_LOCAL | \
230 MNT_EXKERB | MNT_EXPORTANON | MNT_DEFEXPORTED | MNT_EXPORTED | \
231 MNT_EXRDONLY | MNT_ASYNC | MNT_UNION | MNT_NODEV | \
232 MNT_NOSUID | MNT_NOEXEC | MNT_SYNCHRONOUS | MNT_RDONLY)
233
234 /*
235 * External filesystem control flags.
236 */
237 #define MNT_UPDATE 0x00010000 /* not a real mount, just an update */
238 #define MNT_DELEXPORT 0x00020000 /* delete export host lists */
239 #define MNT_RELOAD 0x00040000 /* reload filesystem data */
240 #define MNT_FORCE 0x00080000 /* force unmount or readonly change */
241 #define MNT_GETARGS 0x00400000 /* retrieve file system specific args */
242
243 #define __MNT_EXTERNAL_FLAGS \
244 { MNT_UPDATE, 1, "being updated" }, \
245 { MNT_DELEXPORT, 1, "delete export list" }, \
246 { MNT_RELOAD, 1, "reload filesystem data" }, \
247 { MNT_FORCE, 1, "force unmount or readonly change" }, \
248 { MNT_GETARGS, 1, "retrieve mount arguments" },
249
250 /*
251 * Internal filesystem control flags.
252 * These are set in struct mount mnt_iflag.
253 *
254 * IMNT_UNMOUNT locks the mount entry so that name lookup cannot proceed
255 * past the mount point. This keeps the subtree stable during mounts
256 * and unmounts.
257 */
258 #define IMNT_GONE 0x00000001 /* filesystem is gone.. */
259 #define IMNT_UNMOUNT 0x00000002 /* unmount in progress */
260 #define IMNT_WANTRDWR 0x00000004 /* upgrade to read/write requested */
261 #define IMNT_SUSPEND 0x00000008 /* request upper write suspension */
262 #define IMNT_SUSPENDLOW 0x00000010 /* request lower write suspension */
263 #define IMNT_SUSPENDED 0x00000020 /* write operations are suspended */
264
265 #define __MNT_FLAGS \
266 __MNT_BASIC_FLAGS \
267 __MNT_EXPORTED_FLAGS \
268 __MNT_INTERNAL_FLAGS \
269 __MNT_EXTERNAL_FLAGS
270
271 #define __MNT_FLAG_BITS \
272 "\2" \
273 "\40MNT_SOFTDEP" \
274 "\37MNT_NODEVMTIME" \
275 "\36MNT_SYMPERM" \
276 "\35MNT_EXPUBLIC" \
277 "\34MNT_EXNORESPORT" \
278 "\33MNT_NOATIME" \
279 "\32MNT_UNUSED6" \
280 "\31MNT_UNUSED5" \
281 "\30MNT_UNUSED3" \
282 "\27MNT_GETARGS" \
283 "\26MNT_UNUSED4" \
284 "\25MNT_IGNORE" \
285 "\24MNT_FORCE" \
286 "\23MNT_RELOAD" \
287 "\22MNT_DELEXPORT" \
288 "\21MNT_UPDATE" \
289 "\20MNT_NOCOREDUMP" \
290 "\17MNT_ROOTFS" \
291 "\16MNT_QUOTA" \
292 "\15MNT_LOCAL" \
293 "\14MNT_EXKERB" \
294 "\13MNT_EXPORTANON" \
295 "\12MNT_DEFEXPORTED" \
296 "\11MNT_EXPORTED" \
297 "\10MNT_EXRDONLY" \
298 "\07MNT_ASYNC" \
299 "\06MNT_UNION" \
300 "\05MNT_NODEV" \
301 "\04MNT_NOSUID" \
302 "\03MNT_NOEXEC" \
303 "\02MNT_SYNCHRONOUS" \
304 "\01MNT_RDONLY"
305
306 #define __IMNT_FLAG_BITS \
307 "\2" \
308 "\06IMNT_SUSPENDED" \
309 "\05IMNT_SUSPENDLOW" \
310 "\04IMNT_SUSPEND" \
311 "\03IMNT_WANTRDWR" \
312 "\02IMNT_UNMOUNT" \
313 "\01IMNT_GONE"
314
315 /*
316 * Sysctl CTL_VFS definitions.
317 *
318 * Second level identifier specifies which filesystem. Second level
319 * identifier VFS_GENERIC returns information about all filesystems.
320 *
321 * Note the slightly non-flat nature of these sysctl numbers. Oh for
322 * a better sysctl interface.
323 */
324 #define VFS_GENERIC 0 /* generic filesystem information */
325 #define VFS_MAXTYPENUM 1 /* int: highest defined fs type */
326 #define VFS_CONF 2 /* struct: vfsconf for filesystem given
327 as next argument */
328 #define VFS_USERMOUNT 3 /* enable/disable fs mnt by non-root */
329 #define VFSGEN_MAXID 4 /* number of valid vfs.generic ids */
330
331 /*
332 * USE THE SAME NAMES AS MOUNT_*!
333 *
334 * Only need to add new entry here if the filesystem actually supports
335 * sysctl(2).
336 */
337 #define CTL_VFS_NAMES { \
338 { "generic", CTLTYPE_NODE }, \
339 { MOUNT_FFS, CTLTYPE_NODE }, \
340 { MOUNT_NFS, CTLTYPE_NODE }, \
341 { MOUNT_MFS, CTLTYPE_NODE }, \
342 { MOUNT_MSDOS, CTLTYPE_NODE }, \
343 { MOUNT_LFS, CTLTYPE_NODE }, \
344 { 0, 0 }, /* MOUNT_LOFS */ \
345 { MOUNT_FDESC, CTLTYPE_NODE }, \
346 { MOUNT_PORTAL, CTLTYPE_NODE }, \
347 { MOUNT_NULL, CTLTYPE_NODE }, \
348 { MOUNT_UMAP, CTLTYPE_NODE }, \
349 { MOUNT_KERNFS, CTLTYPE_NODE }, \
350 { MOUNT_PROCFS, CTLTYPE_NODE }, \
351 { MOUNT_AFS, CTLTYPE_NODE }, \
352 { MOUNT_CD9660, CTLTYPE_NODE }, \
353 { MOUNT_UNION, CTLTYPE_NODE }, \
354 { MOUNT_ADOSFS, CTLTYPE_NODE }, \
355 { MOUNT_EXT2FS, CTLTYPE_NODE }, \
356 { MOUNT_CODA, CTLTYPE_NODE }, \
357 { MOUNT_FILECORE, CTLTYPE_NODE }, \
358 { MOUNT_NTFS, CTLTYPE_NODE }, \
359 }
360
361 #define VFS_MAXID 20 /* number of valid vfs ids */
362
363 #define CTL_VFSGENCTL_NAMES { \
364 { 0, 0 }, \
365 { "maxtypenum", CTLTYPE_INT }, \
366 { "conf", CTLTYPE_NODE }, /* Special */ \
367 { "usermount", CTLTYPE_INT }, \
368 }
369
370 /*
371 * Operations supported on mounted file system.
372 */
373 #ifdef _KERNEL
374
375 #if defined(COMPAT_09) || defined(COMPAT_43) || defined(COMPAT_44)
376
377 /*
378 * Filesystem configuration information. Not used by NetBSD, but
379 * defined here to provide a compatible sysctl interface to Lite2.
380 */
381 struct vfsconf {
382 struct vfsops *vfc_vfsops; /* filesystem operations vector */
383 char vfc_name[MFSNAMELEN]; /* filesystem type name */
384 int vfc_typenum; /* historic filesystem type number */
385 int vfc_refcount; /* number mounted of this type */
386 int vfc_flags; /* permanent flags */
387 int (*vfc_mountroot)(void); /* if != NULL, routine to mount root */
388 struct vfsconf *vfc_next; /* next in list */
389 };
390
391 #endif
392
393 #if __STDC__
394 struct nameidata;
395 struct mbuf;
396 struct vnodeopv_desc;
397 #endif
398
399 struct vfsops {
400 const char *vfs_name;
401 int (*vfs_mount) __P((struct mount *, const char *, void *,
402 struct nameidata *, struct proc *));
403 int (*vfs_start) __P((struct mount *, int, struct proc *));
404 int (*vfs_unmount) __P((struct mount *, int, struct proc *));
405 int (*vfs_root) __P((struct mount *, struct vnode **));
406 int (*vfs_quotactl) __P((struct mount *, int, uid_t, caddr_t,
407 struct proc *));
408 int (*vfs_statfs) __P((struct mount *, struct statfs *,
409 struct proc *));
410 int (*vfs_sync) __P((struct mount *, int, struct ucred *,
411 struct proc *));
412 int (*vfs_vget) __P((struct mount *, ino_t, struct vnode **));
413 int (*vfs_fhtovp) __P((struct mount *, struct fid *,
414 struct vnode **));
415 int (*vfs_vptofh) __P((struct vnode *, struct fid *));
416 void (*vfs_init) __P((void));
417 void (*vfs_reinit) __P((void));
418 void (*vfs_done) __P((void));
419 int *vfs_wassysctl; /* @@@ no longer useful */
420 int (*vfs_mountroot) __P((void));
421 int (*vfs_checkexp) __P((struct mount *, struct mbuf *, int *,
422 struct ucred **));
423 const struct vnodeopv_desc * const *vfs_opv_descs;
424 int vfs_refcount;
425 LIST_ENTRY(vfsops) vfs_list;
426 };
427
428 #define VFS_MOUNT(MP, PATH, DATA, NDP, P) \
429 (*(MP)->mnt_op->vfs_mount)(MP, PATH, DATA, NDP, P)
430 #define VFS_START(MP, FLAGS, P) (*(MP)->mnt_op->vfs_start)(MP, FLAGS, P)
431 #define VFS_UNMOUNT(MP, FORCE, P) (*(MP)->mnt_op->vfs_unmount)(MP, FORCE, P)
432 #define VFS_ROOT(MP, VPP) (*(MP)->mnt_op->vfs_root)(MP, VPP)
433 #define VFS_QUOTACTL(MP,C,U,A,P) (*(MP)->mnt_op->vfs_quotactl)(MP, C, U, A, P)
434 #define VFS_STATFS(MP, SBP, P) (*(MP)->mnt_op->vfs_statfs)(MP, SBP, P)
435 #define VFS_SYNC(MP, WAIT, C, P) (*(MP)->mnt_op->vfs_sync)(MP, WAIT, C, P)
436 #define VFS_VGET(MP, INO, VPP) (*(MP)->mnt_op->vfs_vget)(MP, INO, VPP)
437 #define VFS_FHTOVP(MP, FIDP, VPP) (*(MP)->mnt_op->vfs_fhtovp)(MP, FIDP, VPP)
438 #define VFS_CHECKEXP(MP, NAM, EXFLG, CRED) \
439 (*(MP)->mnt_op->vfs_checkexp)(MP, NAM, EXFLG, CRED)
440 #define VFS_VPTOFH(VP, FIDP) (*(VP)->v_mount->mnt_op->vfs_vptofh)(VP, FIDP)
441 #endif /* _KERNEL */
442
443 /*
444 * Flags for various system call interfaces.
445 *
446 * waitfor flags to vfs_sync() and getfsstat()
447 */
448 #define MNT_WAIT 1 /* synchronously wait for I/O to complete */
449 #define MNT_NOWAIT 2 /* start all I/O, but do not wait for it */
450 #define MNT_LAZY 3 /* push data not written by filesystem syncer */
451
452 /*
453 * Generic file handle
454 */
455 struct fhandle {
456 fsid_t fh_fsid; /* File system id of mount point */
457 struct fid fh_fid; /* File sys specific id */
458 };
459 typedef struct fhandle fhandle_t;
460
461 #ifdef _KERNEL
462 #include <net/radix.h>
463 #include <sys/socket.h> /* XXX for AF_MAX */
464
465 /*
466 * Network address lookup element
467 */
468 struct netcred {
469 struct radix_node netc_rnodes[2];
470 int netc_refcnt;
471 int netc_exflags;
472 struct ucred netc_anon;
473 };
474
475 /*
476 * Network export information
477 */
478 struct netexport {
479 struct netcred ne_defexported; /* Default export */
480 struct radix_node_head *ne_rtable[AF_MAX+1]; /* Individual exports */
481 };
482 #endif /* _KERNEL */
483
484 /*
485 * Export arguments for local filesystem mount calls.
486 */
487 struct export_args {
488 int ex_flags; /* export related flags */
489 uid_t ex_root; /* mapping for root uid */
490 struct uucred ex_anon; /* mapping for anonymous user */
491 struct sockaddr *ex_addr; /* net address to which exported */
492 int ex_addrlen; /* and the net address length */
493 struct sockaddr *ex_mask; /* mask of valid bits in saddr */
494 int ex_masklen; /* and the smask length */
495 char *ex_indexfile; /* index file for WebNFS URLs */
496 };
497
498 /*
499 * Structure holding information for a publicly exported filesystem
500 * (WebNFS). Currently the specs allow just for one such filesystem.
501 */
502 struct nfs_public {
503 int np_valid; /* Do we hold valid information */
504 fhandle_t np_handle; /* Filehandle for pub fs (internal) */
505 struct mount *np_mount; /* Mountpoint of exported fs */
506 char *np_index; /* Index file */
507 };
508
509 #ifdef _KERNEL
510 #include <sys/mallocvar.h>
511 MALLOC_DECLARE(M_MOUNT);
512
513 /*
514 * exported VFS interface (see vfssubr(9))
515 */
516 struct mount *vfs_getvfs __P((fsid_t *)); /* return vfs given fsid */
517 int vfs_export /* process mount export info */
518 __P((struct mount *, struct netexport *, struct export_args *));
519 #define vfs_showexport(a, b, c) (void)memset((b), 0, sizeof(*(b)))
520 struct netcred *vfs_export_lookup /* lookup host in fs export list */
521 __P((struct mount *, struct netexport *, struct mbuf *));
522 int vfs_setpublicfs /* set publicly exported fs */
523 __P((struct mount *, struct netexport *, struct export_args *));
524 int vfs_mountedon __P((struct vnode *));/* is a vfs mounted on vp */
525 int vfs_mountroot __P((void));
526 void vfs_shutdown __P((void)); /* unmount and sync file systems */
527 void vfs_unmountall __P((struct proc *)); /* unmount file systems */
528 int vfs_busy __P((struct mount *, int, struct simplelock *));
529 int vfs_rootmountalloc __P((char *, char *, struct mount **));
530 void vfs_unbusy __P((struct mount *));
531 int vfs_attach __P((struct vfsops *));
532 int vfs_detach __P((struct vfsops *));
533 void vfs_reinit __P((void));
534 struct vfsops *vfs_getopsbyname __P((const char *));
535
536 extern CIRCLEQ_HEAD(mntlist, mount) mountlist; /* mounted filesystem list */
537 extern struct vfsops *vfssw[]; /* filesystem type table */
538 extern int nvfssw;
539 extern struct nfs_public nfs_pub;
540 extern struct simplelock mountlist_slock;
541 extern struct simplelock spechash_slock;
542 long makefstype __P((const char *));
543 int dounmount __P((struct mount *, int, struct proc *));
544 void vfsinit __P((void));
545 void vfs_opv_init __P((const struct vnodeopv_desc * const *));
546 void vfs_opv_free __P((const struct vnodeopv_desc * const *));
547 #ifdef DEBUG
548 void vfs_bufstats __P((void));
549 #endif
550
551 LIST_HEAD(vfs_list_head, vfsops);
552 extern struct vfs_list_head vfs_list;
553
554 int set_statfs_info __P((const char *, int, const char *, int,
555 struct mount *, struct proc *));
556 void copy_statfs_info __P((struct statfs *, const struct mount *));
557
558
559 #else /* _KERNEL */
560
561 #include <sys/cdefs.h>
562
563 __BEGIN_DECLS
564 int fstatfs __P((int, struct statfs *));
565 int getfh __P((const char *, fhandle_t *));
566 int getfsstat __P((struct statfs *, long, int));
567 int getmntinfo __P((struct statfs **, int));
568 int mount __P((const char *, const char *, int, void *));
569 int statfs __P((const char *, struct statfs *));
570 int unmount __P((const char *, int));
571 #if defined(_NETBSD_SOURCE)
572 int fhopen __P((const fhandle_t *, int));
573 int fhstat __P((const fhandle_t *, struct stat *));
574 int fhstatfs __P((const fhandle_t *, struct statfs *));
575 #endif /* _NETBSD_SOURCE */
576 __END_DECLS
577
578 #endif /* _KERNEL */
579
580 #endif /* !_SYS_MOUNT_H_ */
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