1/* $OpenBSD: mount.h,v 1.153 2025/01/02 01:19:22 dlg 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
45typedef 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
53struct 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 */
62struct export_args {
63 int ex_flags; /* export related flags */
64 uid_t ex_root; /* mapping for root uid */
65 struct xucred 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 */
75struct 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 */
83struct 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 */
93struct 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 */
110struct 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
135/*
136 * NFS mount option flags
137 */
138#define NFSMNT_RESVPORT 0x00000000 /* always use reserved ports */
139#define NFSMNT_SOFT 0x00000001 /* soft mount (hard is default) */
140#define NFSMNT_WSIZE 0x00000002 /* set write size */
141#define NFSMNT_RSIZE 0x00000004 /* set read size */
142#define NFSMNT_TIMEO 0x00000008 /* set initial timeout */
143#define NFSMNT_RETRANS 0x00000010 /* set number of request retries */
144#define NFSMNT_MAXGRPS 0x00000020 /* set maximum grouplist size */
145#define NFSMNT_INT 0x00000040 /* allow interrupts on hard mount */
146#define NFSMNT_NOCONN 0x00000080 /* Don't Connect the socket */
147#define NFSMNT_NQNFS 0x00000100 /* Use Nqnfs protocol */
148#define NFSMNT_NFSV3 0x00000200 /* Use NFS Version 3 protocol */
149#define NFSMNT_KERB 0x00000400 /* Use Kerberos authentication */
150#define NFSMNT_DUMBTIMR 0x00000800 /* Don't estimate rtt dynamically */
151#define NFSMNT_LEASETERM 0x00001000 /* set lease term (nqnfs) */
152#define NFSMNT_READAHEAD 0x00002000 /* set read ahead */
153#define NFSMNT_DEADTHRESH 0x00004000 /* set dead server retry thresh */
154#define NFSMNT_NOAC 0x00008000 /* disable attribute cache */
155#define NFSMNT_RDIRPLUS 0x00010000 /* Use Readdirplus for V3 */
156#define NFSMNT_READDIRSIZE 0x00020000 /* Set readdir size */
157
158/* Flags valid only in mount syscall arguments */
159#define NFSMNT_ACREGMIN 0x00040000 /* acregmin field valid */
160#define NFSMNT_ACREGMAX 0x00080000 /* acregmax field valid */
161#define NFSMNT_ACDIRMIN 0x00100000 /* acdirmin field valid */
162#define NFSMNT_ACDIRMAX 0x00200000 /* acdirmax field valid */
163
164/* Flags valid only in kernel */
165#define NFSMNT_INTERNAL 0xfffc0000 /* Bits set internally */
166#define NFSMNT_HASWRITEVERF 0x00040000 /* Has write verifier for V3 */
167#define NFSMNT_GOTPATHCONF 0x00080000 /* Got the V3 pathconf info */
168#define NFSMNT_GOTFSINFO 0x00100000 /* Got the V3 fsinfo */
169#define NFSMNT_MNTD 0x00200000 /* Mnt server for mnt point */
170#define NFSMNT_DISMINPROG 0x00400000 /* Dismount in progress */
171#define NFSMNT_DISMNT 0x00800000 /* Dismounted */
172#define NFSMNT_SNDLOCK 0x01000000 /* Send socket lock */
173#define NFSMNT_WANTSND 0x02000000 /* Want above */
174#define NFSMNT_RCVLOCK 0x04000000 /* Rcv socket lock */
175#define NFSMNT_WANTRCV 0x08000000 /* Want above */
176#define NFSMNT_WAITAUTH 0x10000000 /* Wait for authentication */
177#define NFSMNT_HASAUTH 0x20000000 /* Has authenticator */
178#define NFSMNT_WANTAUTH 0x40000000 /* Wants an authenticator */
179#define NFSMNT_AUTHERR 0x80000000 /* Authentication error */
180
181/*
182 * Arguments to mount MSDOS filesystems.
183 */
184struct msdosfs_args {
185 char *fspec; /* blocks special holding the fs to mount */
186 struct export_args export_info;
187 /* network export information */
188 uid_t uid; /* uid that owns msdosfs files */
189 gid_t gid; /* gid that owns msdosfs files */
190 mode_t mask; /* mask to be applied for msdosfs perms */
191 int flags; /* see below */
192};
193
194/*
195 * Msdosfs mount options:
196 */
197#define MSDOSFSMNT_SHORTNAME 0x01 /* Force old DOS short names only */
198#define MSDOSFSMNT_LONGNAME 0x02 /* Force Win'95 long names */
199#define MSDOSFSMNT_NOWIN95 0x04 /* Completely ignore Win95 entries */
200
201/*
202 * Arguments to mount ntfs filesystems
203 */
204struct ntfs_args {
205 char *fspec; /* block special device to mount */
206 struct export_args export_info;/* network export information */
207 uid_t uid; /* uid that owns ntfs files */
208 gid_t gid; /* gid that owns ntfs files */
209 mode_t mode; /* mask to be applied for ntfs perms */
210 u_long flag; /* additional flags */
211};
212
213/*
214 * ntfs mount options:
215 */
216#define NTFS_MFLAG_CASEINS 0x00000001
217#define NTFS_MFLAG_ALLNAMES 0x00000002
218
219/* Arguments to mount UDF file systems */
220struct udf_args {
221 char *fspec; /* Block special device to mount */
222 u_int32_t lastblock; /* Special device last block */
223};
224
225/*
226 * Arguments to mount tmpfs file systems
227 */
228#define TMPFS_ARGS_VERSION 1
229struct tmpfs_args {
230 int ta_version;
231
232 /* Size counters. */
233 ino_t ta_nodes_max;
234 off_t ta_size_max;
235
236 /* Root node attributes. */
237 uid_t ta_root_uid;
238 gid_t ta_root_gid;
239 mode_t ta_root_mode;
240};
241
242/*
243 * Arguments to mount fusefs filesystems
244 */
245struct fusefs_args {
246 char *name;
247 int fd;
248 int max_read;
249
250 /*
251 * FUSE does not allow the file system to be accessed by other users
252 * unless this option is specified. This is to prevent unintentional
253 * denial of service to other users if the file system is not
254 * responding. e.g. user executes df(1) or cron job that scans mounted
255 * file systems.
256 */
257 int allow_other;
258};
259
260/*
261 * file system statistics
262 */
263
264#define MFSNAMELEN 16 /* length of fs type name, including nul */
265#define MNAMELEN 90 /* length of buffer for returned name */
266
267/* per-filesystem mount options */
268union mount_info {
269 struct ufs_args ufs_args;
270 struct mfs_args mfs_args;
271 struct nfs_args nfs_args;
272 struct iso_args iso_args;
273 struct msdosfs_args msdosfs_args;
274 struct ntfs_args ntfs_args;
275 struct tmpfs_args tmpfs_args;
276 char __align[160]; /* 64-bit alignment and room to grow */
277};
278
279/* new statfs structure with mount options and statvfs fields */
280struct statfs {
281 u_int32_t f_flags; /* copy of mount flags */
282 u_int32_t f_bsize; /* file system block size */
283 u_int32_t f_iosize; /* optimal transfer block size */
284
285 /* unit is f_bsize */
286 u_int64_t f_blocks; /* total data blocks in file system */
287 u_int64_t f_bfree; /* free blocks in fs */
288 int64_t f_bavail; /* free blocks avail to non-superuser */
289
290 u_int64_t f_files; /* total file nodes in file system */
291 u_int64_t f_ffree; /* free file nodes in fs */
292 int64_t f_favail; /* free file nodes avail to non-root */
293
294 u_int64_t f_syncwrites; /* count of sync writes since mount */
295 u_int64_t f_syncreads; /* count of sync reads since mount */
296 u_int64_t f_asyncwrites; /* count of async writes since mount */
297 u_int64_t f_asyncreads; /* count of async reads since mount */
298
299 fsid_t f_fsid; /* file system id */
300 u_int32_t f_namemax; /* maximum filename length */
301 uid_t f_owner; /* user that mounted the file system */
302 u_int64_t f_ctime; /* last mount [-u] time */
303
304 char f_fstypename[MFSNAMELEN]; /* fs type name */
305 char f_mntonname[MNAMELEN]; /* directory on which mounted */
306 char f_mntfromname[MNAMELEN]; /* mounted file system */
307 char f_mntfromspec[MNAMELEN]; /* special for mount request */
308 union mount_info mount_info; /* per-filesystem mount options */
309};
310
311
312/*
313 * File system types.
314 */
315#define MOUNT_FFS "ffs" /* UNIX "Fast" Filesystem */
316#define MOUNT_UFS MOUNT_FFS /* for compatibility */
317#define MOUNT_NFS "nfs" /* Network Filesystem */
318#define MOUNT_MFS "mfs" /* Memory Filesystem */
319#define MOUNT_MSDOS "msdos" /* MSDOS Filesystem */
320#define MOUNT_AFS "afs" /* Andrew Filesystem */
321#define MOUNT_CD9660 "cd9660" /* ISO9660 (aka CDROM) Filesystem */
322#define MOUNT_EXT2FS "ext2fs" /* Second Extended Filesystem */
323#define MOUNT_NCPFS "ncpfs" /* NetWare Network File System */
324#define MOUNT_NTFS "ntfs" /* NTFS */
325#define MOUNT_UDF "udf" /* UDF */
326#define MOUNT_TMPFS "tmpfs" /* tmpfs */
327#define MOUNT_FUSEFS "fuse" /* FUSE */
328
329/*
330 * Structure per mounted file system. Each mounted file system has an
331 * array of operations and an instance record. The file systems are
332 * put on a doubly linked list.
333 */
334struct mount {
335 TAILQ_ENTRY(mount) mnt_list; /* mount list */
336 SLIST_ENTRY(mount) mnt_dounmount; /* unmount work queue */
337 const struct vfsops *mnt_op; /* operations on fs */
338 struct vfsconf *mnt_vfc; /* configuration info */
339 struct vnode *mnt_vnodecovered; /* vnode we mounted on */
340 struct vnode *mnt_syncer; /* syncer vnode */
341 TAILQ_HEAD(, vnode) mnt_vnodelist; /* list of vnodes this mount */
342 struct rwlock mnt_lock; /* mount structure lock */
343 struct refcnt mnt_refs;
344 int mnt_flag; /* flags */
345 struct statfs mnt_stat; /* cache of filesystem stats */
346 void *mnt_data; /* private data */
347};
348
349/*
350 * Mount flags.
351 *
352 * Unmount uses MNT_FORCE flag.
353 */
354#define MNT_RDONLY 0x00000001 /* read only filesystem */
355#define MNT_SYNCHRONOUS 0x00000002 /* file system written synchronously */
356#define MNT_NOEXEC 0x00000004 /* can't exec from filesystem */
357#define MNT_NOSUID 0x00000008 /* don't honor setuid bits on fs */
358#define MNT_NODEV 0x00000010 /* don't interpret special files */
359#define MNT_NOPERM 0x00000020 /* don't enforce permission checks */
360#define MNT_ASYNC 0x00000040 /* file system written asynchronously */
361#define MNT_WXALLOWED 0x00000800 /* filesystem allows W|X mappings */
362
363/*
364 * exported mount flags.
365 */
366#define MNT_EXRDONLY 0x00000080 /* exported read only */
367#define MNT_EXPORTED 0x00000100 /* file system is exported */
368#define MNT_DEFEXPORTED 0x00000200 /* exported to the world */
369#define MNT_EXPORTANON 0x00000400 /* use anon uid mapping for everyone */
370
371/*
372 * Flags set by internal operations.
373 */
374#define MNT_LOCAL 0x00001000 /* filesystem is stored locally */
375#define MNT_QUOTA 0x00002000 /* quotas are enabled on filesystem */
376#define MNT_ROOTFS 0x00004000 /* identifies the root filesystem */
377
378/*
379 * Extra post 4.4BSD-lite2 mount flags.
380 */
381#define MNT_NOATIME 0x00008000 /* don't update access times on fs */
382
383/*
384 * Mask of flags that are visible to statfs()
385 */
386#define MNT_VISFLAGMASK 0x0400ffff
387
388#define MNT_BITS \
389 "\20\001RDONLY\002SYNCHRONOUS\003NOEXEC\004NOSUID\005NODEV\006NOPERM" \
390 "\007ASYNC\010EXRDONLY\011EXPORTED\012DEFEXPORTED\013EXPORTANON" \
391 "\014WXALLOWED\015LOCAL\016QUOTA\017ROOTFS\020NOATIME\021UPDATE" \
392 "\022DELEXPORT\023RELOAD\024FORCE\025STALLED\026SWAPPABLE\031UNMOUNT" \
393 "\032WANTRDWR\033SOFTDEP\034DOOMED"
394
395/*
396 * filesystem control flags.
397 */
398#define MNT_UPDATE 0x00010000 /* not a real mount, just an update */
399#define MNT_DELEXPORT 0x00020000 /* delete export host lists */
400#define MNT_RELOAD 0x00040000 /* reload filesystem data */
401#define MNT_FORCE 0x00080000 /* force unmount or readonly change */
402#define MNT_STALLED 0x00100000 /* filesystem stalled */
403#define MNT_SWAPPABLE 0x00200000 /* filesystem can be used for swap */
404#define MNT_UNMOUNT 0x01000000 /* unmount in progress */
405#define MNT_WANTRDWR 0x02000000 /* want upgrade to read/write */
406#define MNT_SOFTDEP 0x04000000 /* soft dependencies being done - now ignored */
407#define MNT_DOOMED 0x08000000 /* device behind filesystem is gone */
408
409#ifdef _KERNEL
410#define MNT_OP_FLAGS (MNT_UPDATE | MNT_RELOAD | MNT_FORCE | MNT_WANTRDWR)
411#endif
412
413/*
414 * Flags for various system call interfaces.
415 *
416 * waitfor flags to vfs_sync() and getfsstat()
417 */
418#define MNT_WAIT 1 /* synchronously wait for I/O to complete */
419#define MNT_NOWAIT 2 /* start all I/O, but do not wait for it */
420#define MNT_LAZY 3 /* push data not written by filesystem syncer */
421
422/*
423 * Generic file handle
424 */
425struct fhandle {
426 fsid_t fh_fsid; /* File system id of mount point */
427 struct fid fh_fid; /* File sys specific id */
428};
429typedef struct fhandle fhandle_t;
430
431/*
432 * Sysctl CTL_VFS definitions.
433 *
434 * Second level identifier specifies which filesystem. Second level
435 * identifier VFS_GENERIC returns information about all filesystems.
436 */
437#define VFS_GENERIC 0 /* generic filesystem information */
438/*
439 * Third level identifiers for VFS_GENERIC are given below; third
440 * level identifiers for specific filesystems are given in their
441 * mount specific header files.
442 */
443#define VFS_MAXTYPENUM 1 /* int: highest defined filesystem type */
444#define VFS_CONF 2 /* struct: vfsconf for filesystem given
445 as next argument */
446#define VFS_BCACHESTAT 3 /* struct: buffer cache statistics given
447 as next argument */
448#define CTL_VFSGENCTL_NAMES { \
449 { 0, 0 }, \
450 { "maxtypenum", CTLTYPE_INT }, \
451 { "conf", CTLTYPE_NODE }, \
452 { "bcachestat", CTLTYPE_STRUCT } \
453}
454
455/*
456 * Filesystem configuration information. One of these exists for each
457 * type of filesystem supported by the kernel. These are searched at
458 * mount time to identify the requested filesystem.
459 */
460struct vfsconf {
461 const struct vfsops *vfc_vfsops; /* filesystem operations vector */
462 char vfc_name[MFSNAMELEN]; /* filesystem type name */
463 int vfc_typenum; /* historic filesystem type number */
464 u_int vfc_refcount; /* number mounted of this type */
465 int vfc_flags; /* permanent flags */
466 size_t vfc_datasize; /* size of data args */
467};
468
469/* buffer cache statistics */
470struct bcachestats {
471 int64_t numbufs; /* number of buffers allocated */
472 int64_t numbufpages; /* number of pages in buffer cache */
473 int64_t numdirtypages; /* number of dirty free pages */
474 int64_t numcleanpages; /* number of clean free pages */
475 int64_t pendingwrites; /* number of pending writes */
476 int64_t pendingreads; /* number of pending reads */
477 int64_t numwrites; /* total writes started */
478 int64_t numreads; /* total reads started */
479 int64_t cachehits; /* total reads found in cache */
480 int64_t busymapped; /* number of busy and mapped buffers */
481 int64_t dmapages; /* dma reachable pages in buffer cache */
482 int64_t highpages; /* pages above dma region */
483 int64_t delwribufs; /* delayed write buffers */
484 int64_t kvaslots; /* kva slots total */
485 int64_t kvaslots_avail; /* available kva slots */
486 int64_t highflips; /* total flips to above DMA */
487 int64_t highflops; /* total failed flips to above DMA */
488 int64_t dmaflips; /* total flips from high to DMA */
489};
490#ifdef _KERNEL
491extern struct bcachestats bcstats;
492extern long buflowpages, bufhighpages, bufbackpages;
493#define BUFPAGES_DEFICIT (((buflowpages - bcstats.numbufpages) < 0) ? 0 \
494 : buflowpages - bcstats.numbufpages)
495#define BUFPAGES_INACT (((bcstats.numcleanpages - buflowpages) < 0) ? 0 \
496 : bcstats.numcleanpages - buflowpages)
497extern int bufcachepercent;
498extern void bufadjust(int);
499struct uvm_constraint_range;
500extern unsigned long bufbackoff(struct uvm_constraint_range*, long);
501
502/*
503 * Operations supported on mounted file system.
504 */
505struct nameidata;
506struct mbuf;
507
508extern int maxvfsconf; /* highest defined filesystem type */
509
510struct vfsops {
511 int (*vfs_mount)(struct mount *mp, const char *path,
512 void *data,
513 struct nameidata *ndp, struct proc *p);
514 int (*vfs_start)(struct mount *mp, int flags,
515 struct proc *p);
516 int (*vfs_unmount)(struct mount *mp, int mntflags,
517 struct proc *p);
518 int (*vfs_root)(struct mount *mp, struct vnode **vpp);
519 int (*vfs_quotactl)(struct mount *mp, int cmds, uid_t uid,
520 caddr_t arg, struct proc *p);
521 int (*vfs_statfs)(struct mount *mp, struct statfs *sbp,
522 struct proc *p);
523 int (*vfs_sync)(struct mount *mp, int waitfor, int stall,
524 struct ucred *cred, struct proc *p);
525 int (*vfs_vget)(struct mount *mp, ino_t ino,
526 struct vnode **vpp);
527 int (*vfs_fhtovp)(struct mount *mp, struct fid *fhp,
528 struct vnode **vpp);
529 int (*vfs_vptofh)(struct vnode *vp, struct fid *fhp);
530 int (*vfs_init)(struct vfsconf *);
531 int (*vfs_sysctl)(int *, u_int, void *, size_t *, void *,
532 size_t, struct proc *);
533 int (*vfs_checkexp)(struct mount *mp, struct mbuf *nam,
534 int *extflagsp, struct ucred **credanonp);
535};
536
537#define VFS_MOUNT(MP, PATH, DATA, NDP, P) \
538 (*(MP)->mnt_op->vfs_mount)(MP, PATH, DATA, NDP, P)
539#define VFS_START(MP, FLAGS, P) (*(MP)->mnt_op->vfs_start)(MP, FLAGS, P)
540#define VFS_UNMOUNT(MP, FORCE, P) (*(MP)->mnt_op->vfs_unmount)(MP, FORCE, P)
541#define VFS_ROOT(MP, VPP) (*(MP)->mnt_op->vfs_root)(MP, VPP)
542#define VFS_QUOTACTL(MP,C,U,A,P) (*(MP)->mnt_op->vfs_quotactl)(MP, C, U, A, P)
543#define VFS_STATFS(MP, SBP, P) (*(MP)->mnt_op->vfs_statfs)(MP, SBP, P)
544#define VFS_SYNC(MP, W, S, C, P) (*(MP)->mnt_op->vfs_sync)(MP, W, S, C, P)
545#define VFS_VGET(MP, INO, VPP) (*(MP)->mnt_op->vfs_vget)(MP, INO, VPP)
546#define VFS_FHTOVP(MP, FIDP, VPP) \
547 (*(MP)->mnt_op->vfs_fhtovp)(MP, FIDP, VPP)
548#define VFS_VPTOFH(VP, FIDP) (*(VP)->v_mount->mnt_op->vfs_vptofh)(VP, FIDP)
549#define VFS_CHECKEXP(MP, NAM, EXFLG, CRED) \
550 (*(MP)->mnt_op->vfs_checkexp)(MP, NAM, EXFLG, CRED)
551
552/* Set up the filesystem operations for vnodes. */
553extern const struct vfsops ffs_vfsops;
554extern const struct vfsops mfs_vfsops;
555extern const struct vfsops msdosfs_vfsops;
556extern const struct vfsops nfs_vfsops;
557extern const struct vfsops cd9660_vfsops;
558extern const struct vfsops ext2fs_vfsops;
559extern const struct vfsops ntfs_vfsops;
560extern const struct vfsops udf_vfsops;
561extern const struct vfsops fusefs_vfsops;
562extern const struct vfsops tmpfs_vfsops;
563
564#include <net/radix.h>
565#include <sys/socket.h> /* XXX for AF_MAX */
566
567/*
568 * Network address lookup element
569 */
570struct netcred {
571 struct radix_node netc_rnodes[2];
572 int netc_exflags;
573 int netc_len; /* size of the allocation */
574 struct ucred netc_anon;
575};
576
577/*
578 * Network export information
579 */
580struct netexport {
581 struct netcred ne_defexported; /* Default export */
582 struct radix_node_head *ne_rtable_inet;/* Individual exports */
583};
584
585/*
586 * exported vnode operations
587 */
588int vfs_busy(struct mount *, int);
589#define VB_READ 0x01
590#define VB_WRITE 0x02
591#define VB_NOWAIT 0x04 /* immediately fail on busy lock */
592#define VB_WAIT 0x08 /* sleep fail on busy lock */
593#define VB_DUPOK 0x10 /* permit duplicate mount busying */
594
595int vfs_isbusy(struct mount *);
596struct mount *vfs_mount_alloc(struct vnode *, struct vfsconf *);
597void vfs_mount_free(struct mount *);
598int vfs_mount_foreach_vnode(struct mount *, int (*func)(struct vnode *,
599 void *), void *);
600void vfs_getnewfsid(struct mount *);
601struct mount *vfs_getvfs(fsid_t *);
602int vfs_mountedon(struct vnode *);
603int vfs_rootmountalloc(char *, char *, struct mount **);
604void vfs_unbusy(struct mount *);
605extern TAILQ_HEAD(mntlist, mount) mountlist;
606int vfs_stall(struct proc *, int);
607void vfs_stall_barrier(void);
608
609 /* process mount export info */
610int vfs_export(struct mount *, struct netexport *, struct export_args *);
611 /* lookup host in fs export list */
612struct netcred *vfs_export_lookup(struct mount *, struct netexport *,
613 struct mbuf *);
614int vfs_allocate_syncvnode(struct mount *);
615
616int vfs_syncwait(struct proc *, int); /* sync and wait for complete */
617void vfs_shutdown(struct proc *); /* unmount and sync file systems */
618int dounmount(struct mount *, int, struct proc *);
619void vfsinit(void);
620struct vfsconf *vfs_byname(const char *);
621struct vfsconf *vfs_bytypenum(int);
622#else /* _KERNEL */
623__BEGIN_DECLS
624int fstatfs(int, struct statfs *);
625int getfh(const char *, fhandle_t *);
626int getfsstat(struct statfs *, size_t, int);
627int getmntinfo(struct statfs **, int);
628int mount(const char *, const char *, int, void *);
629int statfs(const char *, struct statfs *);
630int unmount(const char *, int);
631#if __BSD_VISIBLE
632struct stat;
633int fhopen(const fhandle_t *, int);
634int fhstat(const fhandle_t *, struct stat *);
635int fhstatfs(const fhandle_t *, struct statfs *);
636#endif /* __BSD_VISIBLE */
637__END_DECLS
638#endif /* _KERNEL */
639#endif /* !_SYS_MOUNT_H_ */