1 /* $OpenBSD: mount.h,v 1.81 2007/06/01 05:37:14 deraadt Exp $ */
2 /* $NetBSD: mount.h,v 1.48 1996/02/18 11:55:47 fvdl Exp $ */
3
4 /*
5 * Copyright (c) 1989, 1991, 1993
6 * The Regents of the University of California. All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 * 3. Neither the name of the University nor the names of its contributors
17 * may be used to endorse or promote products derived from this software
18 * without specific prior written permission.
19 *
20 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
30 * SUCH DAMAGE.
31 *
32 * @(#)mount.h 8.15 (Berkeley) 7/14/94
33 */
34
35 #ifndef _SYS_MOUNT_H_
36 #define _SYS_MOUNT_H_
37
38 #include <sys/cdefs.h>
39 #ifndef _KERNEL
40 #include <sys/ucred.h>
41 #endif
42 #include <sys/queue.h>
43 #include <sys/rwlock.h>
44
45 typedef struct { int32_t val[2]; } fsid_t; /* file system id type */
46
47 /*
48 * File identifier.
49 * These are unique per filesystem on a single machine.
50 */
51 #define MAXFIDSZ 16
52
53 struct fid {
54 u_short fid_len; /* length of data in bytes */
55 u_short fid_reserved; /* force longword alignment */
56 char fid_data[MAXFIDSZ]; /* data (variable length) */
57 };
58
59 /*
60 * Export arguments for local filesystem mount calls.
61 */
62 struct export_args {
63 int ex_flags; /* export related flags */
64 uid_t ex_root; /* mapping for root uid */
65 struct ucred ex_anon; /* mapping for anonymous user */
66 struct sockaddr *ex_addr; /* net address to which exported */
67 int ex_addrlen; /* and the net address length */
68 struct sockaddr *ex_mask; /* mask of valid bits in saddr */
69 int ex_masklen; /* and the smask length */
70 };
71
72 /*
73 * Arguments to mount UFS-based filesystems
74 */
75 struct ufs_args {
76 char *fspec; /* block special device to mount */
77 struct export_args export_info;/* network export information */
78 };
79
80 /*
81 * Arguments to mount MFS
82 */
83 struct mfs_args {
84 char *fspec; /* name to export for statfs */
85 struct export_args export_info;/* if exported MFSes are supported */
86 caddr_t base; /* base of file system in memory */
87 u_long size; /* size of file system */
88 };
89
90 /*
91 * Arguments to mount ISO 9660 filesystems.
92 */
93 struct iso_args {
94 char *fspec; /* block special device to mount */
95 struct export_args export_info;/* network export info */
96 int flags; /* mounting flags, see below */
97 int sess; /* start sector of session */
98 };
99
100 #define ISOFSMNT_NORRIP 0x00000001 /* disable Rock Ridge Ext.*/
101 #define ISOFSMNT_GENS 0x00000002 /* enable generation numbers */
102 #define ISOFSMNT_EXTATT 0x00000004 /* enable extended attr. */
103 #define ISOFSMNT_NOJOLIET 0x00000008 /* disable Joliet Ext.*/
104 #define ISOFSMNT_SESS 0x00000010 /* use iso_args.sess */
105
106 /*
107 * Arguments to mount NFS
108 */
109 #define NFS_ARGSVERSION 4 /* change when nfs_args changes */
110 struct nfs_args {
111 int version; /* args structure version number */
112 struct sockaddr *addr; /* file server address */
113 int addrlen; /* length of address */
114 int sotype; /* Socket type */
115 int proto; /* and Protocol */
116 u_char *fh; /* File handle to be mounted */
117 int fhsize; /* Size, in bytes, of fh */
118 int flags; /* flags */
119 int wsize; /* write size in bytes */
120 int rsize; /* read size in bytes */
121 int readdirsize; /* readdir size in bytes */
122 int timeo; /* initial timeout in .1 secs */
123 int retrans; /* times to retry send */
124 int maxgrouplist; /* Max. size of group list */
125 int readahead; /* # of blocks to readahead */
126 int leaseterm; /* Term (sec) of lease */
127 int deadthresh; /* Retrans threshold */
128 char *hostname; /* server's name */
129 int acregmin; /* Attr cache file recently modified */
130 int acregmax; /* ac file not recently modified */
131 int acdirmin; /* ac for dir recently modified */
132 int acdirmax; /* ac for dir not recently modified */
133 };
134 /* NFS args version 3 (for backwards compatibility) */
135 struct nfs_args3 {
136 int version; /* args structure version number */
137 struct sockaddr *addr; /* file server address */
138 int addrlen; /* length of address */
139 int sotype; /* Socket type */
140 int proto; /* and Protocol */
141 u_char *fh; /* File handle to be mounted */
142 int fhsize; /* Size, in bytes, of fh */
143 int flags; /* flags */
144 int wsize; /* write size in bytes */
145 int rsize; /* read size in bytes */
146 int readdirsize; /* readdir size in bytes */
147 int timeo; /* initial timeout in .1 secs */
148 int retrans; /* times to retry send */
149 int maxgrouplist; /* Max. size of group list */
150 int readahead; /* # of blocks to readahead */
151 int leaseterm; /* Term (sec) of lease */
152 int deadthresh; /* Retrans threshold */
153 char *hostname; /* server's name */
154 };
155
156 /*
157 * NFS mount option flags
158 */
159 #ifndef _KERNEL
160 #define NFSMNT_RESVPORT 0x00000000 /* always use reserved ports */
161 #endif /* ! _KERNEL */
162 #define NFSMNT_SOFT 0x00000001 /* soft mount (hard is default) */
163 #define NFSMNT_WSIZE 0x00000002 /* set write size */
164 #define NFSMNT_RSIZE 0x00000004 /* set read size */
165 #define NFSMNT_TIMEO 0x00000008 /* set initial timeout */
166 #define NFSMNT_RETRANS 0x00000010 /* set number of request retries */
167 #define NFSMNT_MAXGRPS 0x00000020 /* set maximum grouplist size */
168 #define NFSMNT_INT 0x00000040 /* allow interrupts on hard mount */
169 #define NFSMNT_NOCONN 0x00000080 /* Don't Connect the socket */
170 #define NFSMNT_NQNFS 0x00000100 /* Use Nqnfs protocol */
171 #define NFSMNT_NFSV3 0x00000200 /* Use NFS Version 3 protocol */
172 #define NFSMNT_KERB 0x00000400 /* Use Kerberos authentication */
173 #define NFSMNT_DUMBTIMR 0x00000800 /* Don't estimate rtt dynamically */
174 #define NFSMNT_LEASETERM 0x00001000 /* set lease term (nqnfs) */
175 #define NFSMNT_READAHEAD 0x00002000 /* set read ahead */
176 #define NFSMNT_DEADTHRESH 0x00004000 /* set dead server retry thresh */
177 #ifdef _KERNEL /* Coming soon to a system call near you! */
178 #define NFSMNT_NOAC 0x00008000 /* disable attribute cache */
179 #endif /* _KERNEL */
180 #define NFSMNT_RDIRPLUS 0x00010000 /* Use Readdirplus for V3 */
181 #define NFSMNT_READDIRSIZE 0x00020000 /* Set readdir size */
182
183 /* Flags valid only in mount syscall arguments */
184 #define NFSMNT_ACREGMIN 0x00040000 /* acregmin field valid */
185 #define NFSMNT_ACREGMAX 0x00080000 /* acregmax field valid */
186 #define NFSMNT_ACDIRMIN 0x00100000 /* acdirmin field valid */
187 #define NFSMNT_ACDIRMAX 0x00200000 /* acdirmax field valid */
188
189 /* Flags valid only in kernel */
190 #define NFSMNT_INTERNAL 0xfffc0000 /* Bits set internally */
191 #define NFSMNT_HASWRITEVERF 0x00040000 /* Has write verifier for V3 */
192 #define NFSMNT_GOTPATHCONF 0x00080000 /* Got the V3 pathconf info */
193 #define NFSMNT_GOTFSINFO 0x00100000 /* Got the V3 fsinfo */
194 #define NFSMNT_MNTD 0x00200000 /* Mnt server for mnt point */
195 #define NFSMNT_DISMINPROG 0x00400000 /* Dismount in progress */
196 #define NFSMNT_DISMNT 0x00800000 /* Dismounted */
197 #define NFSMNT_SNDLOCK 0x01000000 /* Send socket lock */
198 #define NFSMNT_WANTSND 0x02000000 /* Want above */
199 #define NFSMNT_RCVLOCK 0x04000000 /* Rcv socket lock */
200 #define NFSMNT_WANTRCV 0x08000000 /* Want above */
201 #define NFSMNT_WAITAUTH 0x10000000 /* Wait for authentication */
202 #define NFSMNT_HASAUTH 0x20000000 /* Has authenticator */
203 #define NFSMNT_WANTAUTH 0x40000000 /* Wants an authenticator */
204 #define NFSMNT_AUTHERR 0x80000000 /* Authentication error */
205
206 /*
207 * Arguments to mount MSDOS filesystems.
208 */
209 struct msdosfs_args {
210 char *fspec; /* blocks special holding the fs to mount */
211 struct export_args export_info;
212 /* network export information */
213 uid_t uid; /* uid that owns msdosfs files */
214 gid_t gid; /* gid that owns msdosfs files */
215 mode_t mask; /* mask to be applied for msdosfs perms */
216 int flags; /* see below */
217 };
218
219 /*
220 * Msdosfs mount options:
221 */
222 #define MSDOSFSMNT_SHORTNAME 0x01 /* Force old DOS short names only */
223 #define MSDOSFSMNT_LONGNAME 0x02 /* Force Win'95 long names */
224 #define MSDOSFSMNT_NOWIN95 0x04 /* Completely ignore Win95 entries */
225 #define MSDOSFSMNT_ALLOWDIRX 0x10 /* dir is mode +x if r */
226
227 /*
228 * Arguments to mount ntfs filesystems
229 */
230 struct ntfs_args {
231 char *fspec; /* block special device to mount */
232 struct export_args export_info;/* network export information */
233 uid_t uid; /* uid that owns ntfs files */
234 gid_t gid; /* gid that owns ntfs files */
235 mode_t mode; /* mask to be applied for ntfs perms */
236 u_long flag; /* additional flags */
237 };
238
239 /*
240 * ntfs mount options:
241 */
242 #define NTFS_MFLAG_CASEINS 0x00000001
243 #define NTFS_MFLAG_ALLNAMES 0x00000002
244
245 /* Arguments to mount UDF file systems */
246 struct udf_args {
247 char *fspec; /* Block special device to mount */
248 u_int32_t lastblock; /* Special device last block */
249 };
250
251 /*
252 * Arguments to mount procfs filesystems
253 */
254 struct procfs_args {
255 int version;
256 int flags;
257 };
258
259 /*
260 * procfs mount options:
261 */
262 #define PROCFS_ARGSVERSION 1
263 #define PROCFSMNT_LINUXCOMPAT 0x01
264
265
266 /*
267 * file system statistics
268 */
269
270 #define MFSNAMELEN 16 /* length of fs type name, including nul */
271 #define MNAMELEN 90 /* length of buffer for returned name */
272
273 /* per-filesystem mount options */
274 union mount_info {
275 struct ufs_args ufs_args;
276 struct mfs_args mfs_args;
277 struct nfs_args nfs_args;
278 struct iso_args iso_args;
279 struct procfs_args procfs_args;
280 struct msdosfs_args msdosfs_args;
281 struct ntfs_args ntfs_args;
282 char __align[160]; /* 64-bit alignment and room to grow */
283 };
284
285 /* new statfs structure with mount options */
286 struct statfs {
287 u_int32_t f_flags; /* copy of mount flags */
288 int32_t f_bsize; /* fundamental file system block size */
289 u_int32_t f_iosize; /* optimal transfer block size */
290 u_int32_t f_blocks; /* total data blocks in file system */
291 u_int32_t f_bfree; /* free blocks in fs */
292 int32_t f_bavail; /* free blocks avail to non-superuser */
293 u_int32_t f_files; /* total file nodes in file system */
294 u_int32_t f_ffree; /* free file nodes in fs */
295 fsid_t f_fsid; /* file system id */
296 uid_t f_owner; /* user that mounted the file system */
297 u_int32_t f_syncwrites; /* count of sync writes since mount */
298 u_int32_t f_asyncwrites; /* count of async writes since mount */
299 u_int32_t f_ctime; /* last mount [-u] time */
300 u_int32_t f_spare[3]; /* spare for later */
301 char f_fstypename[MFSNAMELEN]; /* fs type name */
302 char f_mntonname[MNAMELEN]; /* directory on which mounted */
303 char f_mntfromname[MNAMELEN]; /* mounted file system */
304 union mount_info mount_info; /* per-filesystem mount options */
305 };
306
307 /* old (pre-2.6) statfs structure */
308 struct ostatfs {
309 short f_type; /* type of file system (unused; zero) */
310 short f_flags; /* copy of mount flags */
311 long f_bsize; /* fundamental file system block size */
312 long f_iosize; /* optimal transfer block size */
313 long f_blocks; /* total data blocks in file system */
314 long f_bfree; /* free blocks in fs */
315 long f_bavail; /* free blocks avail to non-superuser */
316 long f_files; /* total file nodes in file system */
317 long f_ffree; /* free file nodes in fs */
318 fsid_t f_fsid; /* file system id */
319 uid_t f_owner; /* user that mounted the file system */
320 long f_syncwrites; /* count of sync writes since mount */
321 long f_asyncwrites; /* count of async writes since mount */
322 long f_spare[2]; /* spare for later */
323 char f_fstypename[MFSNAMELEN]; /* fs type name */
324 char f_mntonname[MNAMELEN]; /* directory on which mounted */
325 char f_mntfromname[MNAMELEN]; /* mounted file system */
326 };
327
328 /*
329 * File system types.
330 */
331 #define MOUNT_FFS "ffs" /* UNIX "Fast" Filesystem */
332 #define MOUNT_UFS MOUNT_FFS /* for compatibility */
333 #define MOUNT_NFS "nfs" /* Network Filesystem */
334 #define MOUNT_MFS "mfs" /* Memory Filesystem */
335 #define MOUNT_MSDOS "msdos" /* MSDOS Filesystem */
336 #define MOUNT_PORTAL "portal" /* Portal Filesystem */
337 #define MOUNT_PROCFS "procfs" /* /proc Filesystem */
338 #define MOUNT_AFS "afs" /* Andrew Filesystem */
339 #define MOUNT_CD9660 "cd9660" /* ISO9660 (aka CDROM) Filesystem */
340 #define MOUNT_EXT2FS "ext2fs" /* Second Extended Filesystem */
341 #define MOUNT_NCPFS "ncpfs" /* NetWare Network File System */
342 #define MOUNT_XFS "xfs" /* xfs */
343 #define MOUNT_NTFS "ntfs" /* NTFS */
344 #define MOUNT_UDF "udf" /* UDF */
345
346 /*
347 * Structure per mounted file system. Each mounted file system has an
348 * array of operations and an instance record. The file systems are
349 * put on a doubly linked list.
350 */
351 LIST_HEAD(vnodelst, vnode);
352
353 struct mount {
354 CIRCLEQ_ENTRY(mount) mnt_list; /* mount list */
355 const struct vfsops *mnt_op; /* operations on fs */
356 struct vfsconf *mnt_vfc; /* configuration info */
357 struct vnode *mnt_vnodecovered; /* vnode we mounted on */
358 struct vnode *mnt_syncer; /* syncer vnode */
359 struct vnodelst mnt_vnodelist; /* list of vnodes this mount */
360 struct rwlock mnt_lock; /* mount structure lock */
361 int mnt_flag; /* flags */
362 int mnt_maxsymlinklen; /* max size of short symlink */
363 struct statfs mnt_stat; /* cache of filesystem stats */
364 void *mnt_data; /* private data */
365 };
366
367 /*
368 * Mount flags.
369 *
370 * Unmount uses MNT_FORCE flag.
371 */
372 #define MNT_RDONLY 0x00000001 /* read only filesystem */
373 #define MNT_SYNCHRONOUS 0x00000002 /* file system written synchronously */
374 #define MNT_NOEXEC 0x00000004 /* can't exec from filesystem */
375 #define MNT_NOSUID 0x00000008 /* don't honor setuid bits on fs */
376 #define MNT_NODEV 0x00000010 /* don't interpret special files */
377 #define MNT_ASYNC 0x00000040 /* file system written asynchronously */
378
379 /*
380 * exported mount flags.
381 */
382 #define MNT_EXRDONLY 0x00000080 /* exported read only */
383 #define MNT_EXPORTED 0x00000100 /* file system is exported */
384 #define MNT_DEFEXPORTED 0x00000200 /* exported to the world */
385 #define MNT_EXPORTANON 0x00000400 /* use anon uid mapping for everyone */
386 #define MNT_EXKERB 0x00000800 /* exported with Kerberos uid mapping */
387
388 /*
389 * Flags set by internal operations.
390 */
391 #define MNT_LOCAL 0x00001000 /* filesystem is stored locally */
392 #define MNT_QUOTA 0x00002000 /* quotas are enabled on filesystem */
393 #define MNT_ROOTFS 0x00004000 /* identifies the root filesystem */
394
395 /*
396 * Extra post 4.4BSD-lite2 mount flags.
397 */
398 #define MNT_NOATIME 0x00008000 /* don't update access times on fs */
399
400 /*
401 * Mask of flags that are visible to statfs()
402 */
403 #define MNT_VISFLAGMASK 0x0400ffff
404
405 #define MNT_BITS \
406 "\010\001RDONLY\002SYNCHRONOUS\003NOEXEC\004NOSUID\005NODEV" \
407 "\007ASYNC\010EXRDONLY\011EXPORTED\012DEFEXPORTED\013EXPORTANON" \
408 "\014EXKERB\015LOCAL\016QUOTA\017ROOTFS"
409
410 /*
411 * filesystem control flags.
412 */
413 #define MNT_UPDATE 0x00010000 /* not a real mount, just an update */
414 #define MNT_DELEXPORT 0x00020000 /* delete export host lists */
415 #define MNT_RELOAD 0x00040000 /* reload filesystem data */
416 #define MNT_FORCE 0x00080000 /* force unmount or readonly change */
417 #define MNT_WANTRDWR 0x02000000 /* want upgrade to read/write */
418 #define MNT_SOFTDEP 0x04000000 /* soft dependencies being done */
419 #define MNT_DOOMED 0x08000000 /* device behind filesystem is gone */
420
421 /*
422 * Sysctl CTL_VFS definitions.
423 *
424 * Second level identifier specifies which filesystem. Second level
425 * identifier VFS_GENERIC returns information about all filesystems.
426 */
427 #define VFS_GENERIC 0 /* generic filesystem information */
428 /*
429 * Third level identifiers for VFS_GENERIC are given below; third
430 * level identifiers for specific filesystems are given in their
431 * mount specific header files.
432 */
433 #define VFS_MAXTYPENUM 1 /* int: highest defined filesystem type */
434 #define VFS_CONF 2 /* struct: vfsconf for filesystem given
435 as next argument */
436 #define CTL_VFSGENCTL_NAMES { \
437 { 0, 0 }, \
438 { "maxtypenum", CTLTYPE_INT }, \
439 { "conf", CTLTYPE_NODE } \
440 }
441
442 /*
443 * Filesystem configuration information. One of these exists for each
444 * type of filesystem supported by the kernel. These are searched at
445 * mount time to identify the requested filesystem.
446 */
447 struct vfsconf {
448 const struct vfsops *vfc_vfsops; /* filesystem operations vector */
449 char vfc_name[MFSNAMELEN]; /* filesystem type name */
450 int vfc_typenum; /* historic filesystem type number */
451 int vfc_refcount; /* number mounted of this type */
452 int vfc_flags; /* permanent flags */
453 int (*vfc_mountroot)(void); /* if != NULL, routine to mount root */
454 struct vfsconf *vfc_next; /* next in list */
455 };
456
457 /*
458 * Operations supported on mounted file system.
459 */
460 #ifdef _KERNEL
461 #ifdef __STDC__
462 struct nameidata;
463 struct mbuf;
464 #endif
465
466 extern int maxvfsconf; /* highest defined filesystem type */
467 extern struct vfsconf *vfsconf; /* head of list of filesystem types */
468
469 struct vfsops {
470 int (*vfs_mount)(struct mount *mp, const char *path,
471 void *data,
472 struct nameidata *ndp, struct proc *p);
473 int (*vfs_start)(struct mount *mp, int flags,
474 struct proc *p);
475 int (*vfs_unmount)(struct mount *mp, int mntflags,
476 struct proc *p);
477 int (*vfs_root)(struct mount *mp, struct vnode **vpp);
478 int (*vfs_quotactl)(struct mount *mp, int cmds, uid_t uid,
479 caddr_t arg, struct proc *p);
480 int (*vfs_statfs)(struct mount *mp, struct statfs *sbp,
481 struct proc *p);
482 int (*vfs_sync)(struct mount *mp, int waitfor,
483 struct ucred *cred, struct proc *p);
484 int (*vfs_vget)(struct mount *mp, ino_t ino,
485 struct vnode **vpp);
486 int (*vfs_fhtovp)(struct mount *mp, struct fid *fhp,
487 struct vnode **vpp);
488 int (*vfs_vptofh)(struct vnode *vp, struct fid *fhp);
489 int (*vfs_init)(struct vfsconf *);
490 int (*vfs_sysctl)(int *, u_int, void *, size_t *, void *,
491 size_t, struct proc *);
492 int (*vfs_checkexp)(struct mount *mp, struct mbuf *nam,
493 int *extflagsp, struct ucred **credanonp);
494 };
495
496 #define VFS_MOUNT(MP, PATH, DATA, NDP, P) \
497 (*(MP)->mnt_op->vfs_mount)(MP, PATH, DATA, NDP, P)
498 #define VFS_START(MP, FLAGS, P) (*(MP)->mnt_op->vfs_start)(MP, FLAGS, P)
499 #define VFS_UNMOUNT(MP, FORCE, P) (*(MP)->mnt_op->vfs_unmount)(MP, FORCE, P)
500 #define VFS_ROOT(MP, VPP) (*(MP)->mnt_op->vfs_root)(MP, VPP)
501 #define VFS_QUOTACTL(MP,C,U,A,P) (*(MP)->mnt_op->vfs_quotactl)(MP, C, U, A, P)
502 #define VFS_STATFS(MP, SBP, P) (*(MP)->mnt_op->vfs_statfs)(MP, SBP, P)
503 #define VFS_SYNC(MP, WAIT, C, P) (*(MP)->mnt_op->vfs_sync)(MP, WAIT, C, P)
504 #define VFS_VGET(MP, INO, VPP) (*(MP)->mnt_op->vfs_vget)(MP, INO, VPP)
505 #define VFS_FHTOVP(MP, FIDP, VPP) \
506 (*(MP)->mnt_op->vfs_fhtovp)(MP, FIDP, VPP)
507 #define VFS_VPTOFH(VP, FIDP) (*(VP)->v_mount->mnt_op->vfs_vptofh)(VP, FIDP)
508 #define VFS_CHECKEXP(MP, NAM, EXFLG, CRED) \
509 (*(MP)->mnt_op->vfs_checkexp)(MP, NAM, EXFLG, CRED)
510 #endif /* _KERNEL */
511
512 /*
513 * Flags for various system call interfaces.
514 *
515 * waitfor flags to vfs_sync() and getfsstat()
516 */
517 #define MNT_WAIT 1 /* synchronously wait for I/O to complete */
518 #define MNT_NOWAIT 2 /* start all I/O, but do not wait for it */
519 #define MNT_LAZY 3 /* push data not written by filesystem syncer */
520
521 /*
522 * Generic file handle
523 */
524 struct fhandle {
525 fsid_t fh_fsid; /* File system id of mount point */
526 struct fid fh_fid; /* File sys specific id */
527 };
528 typedef struct fhandle fhandle_t;
529
530 #ifdef _KERNEL
531 #include <net/radix.h>
532 #include <sys/socket.h> /* XXX for AF_MAX */
533
534 /*
535 * Network address lookup element
536 */
537 struct netcred {
538 struct radix_node netc_rnodes[2];
539 int netc_exflags;
540 struct ucred netc_anon;
541 };
542
543 /*
544 * Network export information
545 */
546 struct netexport {
547 struct netcred ne_defexported; /* Default export */
548 struct radix_node_head *ne_rtable[AF_MAX+1]; /* Individual exports */
549 };
550 #endif /* _KERNEL */
551
552 #ifdef _KERNEL
553 /*
554 * exported vnode operations
555 */
556 int vfs_busy(struct mount *, int);
557 #define VB_READ 0x01
558 #define VB_WRITE 0x02
559 #define VB_NOWAIT 0x04 /* immediately fail on busy lock */
560 #define VB_WAIT 0x08 /* sleep fail on busy lock */
561
562 int vfs_isbusy(struct mount *);
563 int vfs_mount_foreach_vnode(struct mount *, int (*func)(struct vnode *,
564 void *), void *);
565 void vfs_getnewfsid(struct mount *);
566 struct mount *vfs_getvfs(fsid_t *);
567 int vfs_mountedon(struct vnode *);
568 int vfs_mountroot(void);
569 int vfs_rootmountalloc(char *, char *, struct mount **);
570 void vfs_unbusy(struct mount *);
571 void vfs_unmountall(void);
572 extern CIRCLEQ_HEAD(mntlist, mount) mountlist;
573
574 struct mount *getvfs(fsid_t *); /* return vfs given fsid */
575 /* process mount export info */
576 int vfs_export(struct mount *, struct netexport *, struct export_args *);
577 /* lookup host in fs export list */
578 struct netcred *vfs_export_lookup(struct mount *, struct netexport *,
579 struct mbuf *);
580 int vfs_allocate_syncvnode(struct mount *);
581 int speedup_syncer(void);
582
583 int vfs_syncwait(int); /* sync and wait for complete */
584 void vfs_shutdown(void); /* unmount and sync file systems */
585 long makefstype(char *);
586 int dounmount(struct mount *, int, struct proc *, struct vnode *);
587 void vfsinit(void);
588 void vfs_bufstats(void);
589 int vfs_register(struct vfsconf *);
590 int vfs_unregister(struct vfsconf *);
591 #else /* _KERNEL */
592
593 #ifndef _SYS_STAT_H_
594 struct stat;
595 #endif
596
597 __BEGIN_DECLS
598 int fstatfs(int, struct statfs *);
599 int getfh(const char *, fhandle_t *);
600 int getfsstat(struct statfs *, size_t, int);
601 int getmntinfo(struct statfs **, int);
602 int mount(const char *, const char *, int, void *);
603 int statfs(const char *, struct statfs *);
604 int unmount(const char *, int);
605 #if __BSD_VISIBLE
606 int fhopen(const fhandle_t *, int);
607 int fhstat(const fhandle_t *, struct stat *);
608 int fhstatfs(const fhandle_t *, struct statfs *);
609 #endif /* __BSD_VISIBLE */
610
611 __END_DECLS
612
613 #endif /* _KERNEL */
614 #endif /* !_SYS_MOUNT_H_ */