kernel - Do a better job with the filesystem background sync
[dragonfly.git] / sys / sys / mount.h
CommitLineData
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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: src/sys/sys/mount.h,v 1.89.2.7 2003/04/04 20:35:57 tegge Exp $
67863d04 35 * $DragonFly: src/sys/sys/mount.h,v 1.47 2008/09/17 21:44:19 dillon Exp $
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36 */
37
38#ifndef _SYS_MOUNT_H_
39#define _SYS_MOUNT_H_
40
41#include <sys/ucred.h>
42
43#ifndef _KERNEL
44#if !defined(_POSIX_C_SOURCE) && !defined(_XOPEN_SOURCE)
45#include <sys/stat.h>
46#endif /* !_POSIX_C_SOURCE */
47#endif /* !_KERNEL */
48
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49#if defined(_KERNEL) || defined(_KERNEL_STRUCTURES)
50#ifndef _SYS_QUEUE_H_
984263bc 51#include <sys/queue.h>
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52#endif
53#ifndef _SYS_LOCK_H_
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54#include <sys/lock.h>
55#endif
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56#ifndef _SYS_NAMECACHE_H_
57#include <sys/namecache.h>
58#endif
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59#ifndef _SYS_STATVFS_H_
60#include <sys/statvfs.h>
61#endif
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62#ifndef _SYS_THREAD_H_
63#include <sys/thread.h>
64#endif
03d6a592 65#endif
984263bc 66
dadab5e9 67struct thread;
2281065e 68struct journal;
0961aa92 69struct vop_ops;
2281065e 70struct vop_mountctl_args;
0e735c8f 71struct statvfs;
dadab5e9 72
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73typedef struct fsid { int32_t val[2]; } fsid_t; /* file system id type */
74
75/*
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76 * File identifier. These are unique per filesystem on a single machine.
77 *
78 * fix_ext is also used by HAMMER.
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79 */
80#define MAXFIDSZ 16
81
82struct fid {
83 u_short fid_len; /* length of data in bytes */
3e3a527f 84 u_short fid_ext; /* extended data */
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85 char fid_data[MAXFIDSZ]; /* data (variable length) */
86};
87
88/*
89 * file system statistics
90 */
91
92#define MFSNAMELEN 16 /* length of fs type name, including null */
984263bc 93#define MNAMELEN 80 /* length of buffer for returned name */
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94
95struct statfs {
96 long f_spare2; /* placeholder */
97 long f_bsize; /* fundamental file system block size */
98 long f_iosize; /* optimal transfer block size */
99 long f_blocks; /* total data blocks in file system */
100 long f_bfree; /* free blocks in fs */
101 long f_bavail; /* free blocks avail to non-superuser */
102 long f_files; /* total file nodes in file system */
103 long f_ffree; /* free file nodes in fs */
104 fsid_t f_fsid; /* file system id */
105 uid_t f_owner; /* user that mounted the filesystem */
106 int f_type; /* type of filesystem */
107 int f_flags; /* copy of mount exported flags */
108 long f_syncwrites; /* count of sync writes since mount */
109 long f_asyncwrites; /* count of async writes since mount */
110 char f_fstypename[MFSNAMELEN]; /* fs type name */
111 char f_mntonname[MNAMELEN]; /* directory on which mounted */
112 long f_syncreads; /* count of sync reads since mount */
113 long f_asyncreads; /* count of async reads since mount */
114 short f_spares1; /* unused spare */
115 char f_mntfromname[MNAMELEN];/* mounted filesystem */
116 short f_spares2; /* unused spare */
117 long f_spare[2]; /* unused spare */
118};
119
ec12abe0 120#if defined(_KERNEL) || defined(_KERNEL_STRUCTURES)
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121
122/*
123 * bio_ops are associated with the mount structure and used in conjuction
124 * with the b_dep field in a buffer. Currently softupdates and HAMMER
125 * utilize this field.
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126 *
127 * All bio_ops callbacks must be MPSAFE and could be called without
128 * the mplock.
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129 */
130struct buf;
131
132struct bio_ops {
133 TAILQ_ENTRY(bio_ops) entry;
134 void (*io_start) (struct buf *);
135 void (*io_complete) (struct buf *);
136 void (*io_deallocate) (struct buf *);
137 int (*io_fsync) (struct vnode *);
138 int (*io_sync) (struct mount *);
139 void (*io_movedeps) (struct buf *, struct buf *);
140 int (*io_countdeps) (struct buf *, int);
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141 int (*io_checkread) (struct buf *);
142 int (*io_checkwrite) (struct buf *);
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143};
144
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145/*
146 * Structure per mounted file system. Each mounted file system has an
147 * array of operations and an instance record. The file systems are
148 * put on a doubly linked list.
149 *
150 * NOTE: mnt_nvnodelist and mnt_reservedvnlist. At the moment vnodes
151 * are linked into mnt_nvnodelist. At some point in the near future the
152 * vnode list will be split into a 'dirty' and 'clean' list. mnt_nvnodelist
153 * will become the dirty list and mnt_reservedvnlist will become the 'clean'
154 * list. Filesystem kld's syncing code should remain compatible since
155 * they only need to scan the dirty vnode list (nvnodelist -> dirtyvnodelist).
41a01a4d 156 *
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157 * NOTE: All VFSs must at least populate mnt_vn_ops or those VOP ops that
158 * only take namecache pointers will not be able to find their operations
159 * vector via namecache->nc_mount.
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160 *
161 * MPSAFE NOTES: mnt_lock interlocks mounting and unmounting operations.
162 *
163 * mnt_token interlocks operations which adjust the mount
164 * structure and will also be held through VFS operations
165 * for VFSes not flagged MPSAFE.
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166 */
167TAILQ_HEAD(vnodelst, vnode);
2281065e 168TAILQ_HEAD(journallst, journal);
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169
170struct mount {
171 TAILQ_ENTRY(mount) mnt_list; /* mount list */
172 struct vfsops *mnt_op; /* operations on fs */
173 struct vfsconf *mnt_vfc; /* configuration info */
4b5bbb78 174 long mnt_namecache_gen; /* ++ to clear negative hits */
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175 struct vnode *mnt_syncer; /* syncer vnode */
176 struct vnodelst mnt_nvnodelist; /* list of vnodes this mount */
177 struct lock mnt_lock; /* mount structure lock */
178 int mnt_flag; /* flags shared with user */
179 int mnt_kern_flag; /* kernel only flags */
180 int mnt_maxsymlinklen; /* max size of short symlink */
181 struct statfs mnt_stat; /* cache of filesystem stats */
d9fad06e 182 struct statvfs mnt_vstat; /* extended stats */
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183 qaddr_t mnt_data; /* private data */
184 time_t mnt_time; /* last time written*/
185 u_int mnt_iosize_max; /* max IO request size */
186 struct vnodelst mnt_reservedvnlist; /* (future) dirty vnode list */
187 int mnt_nvnodelistsize; /* # of vnodes on this mount */
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188
189 /*
190 * ops vectors have a fixed stacking order. All primary calls run
191 * through mnt_vn_ops. This field is typically assigned to
192 * mnt_vn_norm_ops. If journaling has been enabled this field is
193 * usually assigned to mnt_vn_journal_ops.
194 */
195 struct vop_ops *mnt_vn_use_ops; /* current ops set */
196
197 struct vop_ops *mnt_vn_coherency_ops; /* cache coherency ops */
198 struct vop_ops *mnt_vn_journal_ops; /* journaling ops */
199 struct vop_ops *mnt_vn_norm_ops; /* for use by the VFS */
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200 struct vop_ops *mnt_vn_spec_ops; /* for use by the VFS */
201 struct vop_ops *mnt_vn_fifo_ops; /* for use by the VFS */
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202 struct nchandle mnt_ncmountpt; /* mount point */
203 struct nchandle mnt_ncmounton; /* mounted on */
204 int mnt_refs; /* nchandle references */
aac0aabd 205 struct lwkt_token mnt_token; /* token lock if not MPSAFE */
2281065e 206 struct journallst mnt_jlist; /* list of active journals */
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207 u_int8_t *mnt_jbitmap; /* streamid bitmap */
208 int16_t mnt_streamid; /* last streamid */
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209
210 struct bio_ops *mnt_bioops; /* BIO ops (hammer, softupd) */
984263bc 211};
2281065e 212
ec12abe0 213#endif /* _KERNEL || _KERNEL_STRUCTURES */
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214
215/*
216 * User specifiable flags.
217 */
218#define MNT_RDONLY 0x00000001 /* read only filesystem */
219#define MNT_SYNCHRONOUS 0x00000002 /* file system written synchronously */
220#define MNT_NOEXEC 0x00000004 /* can't exec from filesystem */
221#define MNT_NOSUID 0x00000008 /* don't honor setuid bits on fs */
222#define MNT_NODEV 0x00000010 /* don't interpret special files */
223#define MNT_UNION 0x00000020 /* union with underlying filesystem */
224#define MNT_ASYNC 0x00000040 /* file system written asynchronously */
225#define MNT_SUIDDIR 0x00100000 /* special handling of SUID on dirs */
226#define MNT_SOFTDEP 0x00200000 /* soft updates being done */
227#define MNT_NOSYMFOLLOW 0x00400000 /* do not follow symlinks */
228#define MNT_NOATIME 0x10000000 /* disable update of file access time */
229#define MNT_NOCLUSTERR 0x40000000 /* disable cluster read */
230#define MNT_NOCLUSTERW 0x80000000 /* disable cluster write */
231
232/*
233 * NFS export related mount flags.
234 */
235#define MNT_EXRDONLY 0x00000080 /* exported read only */
236#define MNT_EXPORTED 0x00000100 /* file system is exported */
237#define MNT_DEFEXPORTED 0x00000200 /* exported to the world */
238#define MNT_EXPORTANON 0x00000400 /* use anon uid mapping for everyone */
239#define MNT_EXKERB 0x00000800 /* exported with Kerberos uid mapping */
240#define MNT_EXPUBLIC 0x20000000 /* public export (WebNFS) */
241
242/*
243 * Flags set by internal operations,
244 * but visible to the user.
245 * XXX some of these are not quite right.. (I've never seen the root flag set)
246 */
247#define MNT_LOCAL 0x00001000 /* filesystem is stored locally */
248#define MNT_QUOTA 0x00002000 /* quotas are enabled on filesystem */
249#define MNT_ROOTFS 0x00004000 /* identifies the root filesystem */
250#define MNT_USER 0x00008000 /* mounted by a user */
251#define MNT_IGNORE 0x00800000 /* do not show entry in df */
252
253/*
254 * Mask of flags that are visible to statfs()
255 * XXX I think that this could now become (~(MNT_CMDFLAGS))
256 * but the 'mount' program may need changing to handle this.
257 */
258#define MNT_VISFLAGMASK (MNT_RDONLY | MNT_SYNCHRONOUS | MNT_NOEXEC | \
259 MNT_NOSUID | MNT_NODEV | MNT_UNION | \
260 MNT_ASYNC | MNT_EXRDONLY | MNT_EXPORTED | \
261 MNT_DEFEXPORTED | MNT_EXPORTANON| MNT_EXKERB | \
262 MNT_LOCAL | MNT_USER | MNT_QUOTA | \
263 MNT_ROOTFS | MNT_NOATIME | MNT_NOCLUSTERR| \
264 MNT_NOCLUSTERW | MNT_SUIDDIR | MNT_SOFTDEP | \
265 MNT_IGNORE | MNT_NOSYMFOLLOW | MNT_EXPUBLIC )
266/*
267 * External filesystem command modifier flags.
268 * Unmount can use the MNT_FORCE flag.
269 * XXX These are not STATES and really should be somewhere else.
270 */
271#define MNT_UPDATE 0x00010000 /* not a real mount, just an update */
272#define MNT_DELEXPORT 0x00020000 /* delete export host lists */
273#define MNT_RELOAD 0x00040000 /* reload filesystem data */
274#define MNT_FORCE 0x00080000 /* force unmount or readonly change */
275#define MNT_CMDFLAGS (MNT_UPDATE|MNT_DELEXPORT|MNT_RELOAD|MNT_FORCE)
276/*
277 * Internal filesystem control flags stored in mnt_kern_flag.
278 *
279 * MNTK_UNMOUNT locks the mount entry so that name lookup cannot proceed
280 * past the mount point. This keeps the subtree stable during mounts
281 * and unmounts.
282 *
283 * MNTK_UNMOUNTF permits filesystems to detect a forced unmount while
284 * dounmount() is still waiting to lock the mountpoint. This allows
285 * the filesystem to cancel operations that might otherwise deadlock
286 * with the unmount attempt (used by NFS).
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287 *
288 * MNTK_NOSTKMNT prevents mounting another filesystem inside the flagged one.
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289 */
290#define MNTK_UNMOUNTF 0x00000001 /* forced unmount in progress */
aac0aabd 291#define MNTK_MPSAFE 0x00010000 /* call vops without mnt_token lock */
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292#define MNTK_RD_MPSAFE 0x00020000 /* vop_read is MPSAFE */
293#define MNTK_WR_MPSAFE 0x00040000 /* vop_write is MPSAFE */
294#define MNTK_GA_MPSAFE 0x00080000 /* vop_getattr is MPSAFE */
295#define MNTK_IN_MPSAFE 0x00100000 /* vop_inactive is MPSAFE */
7a2de9a4 296#define MNTK_SG_MPSAFE 0x00200000 /* vop_strategy is MPSAFE */
28623bf9 297#define MNTK_NCALIASED 0x00800000 /* namecached aliased */
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298#define MNTK_UNMOUNT 0x01000000 /* unmount in progress */
299#define MNTK_MWAIT 0x02000000 /* waiting for unmount to finish */
300#define MNTK_WANTRDWR 0x04000000 /* upgrade to read/write requested */
66a1ddf5 301#define MNTK_FSMID 0x08000000 /* getattr supports FSMIDs */
5dc91765 302#define MNTK_NOSTKMNT 0x10000000 /* no stacked mount point allowed */
2bc7505b 303#define MNTK_NOMSYNC 0x20000000 /* used by tmpfs */
984263bc 304
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305#define MNTK_ALL_MPSAFE (MNTK_MPSAFE | MNTK_RD_MPSAFE | MNTK_WR_MPSAFE | \
306 MNTK_GA_MPSAFE | MNTK_IN_MPSAFE | MNTK_SG_MPSAFE)
307
984263bc 308/*
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309 * mountlist_*() defines
310 */
311#define MNTSCAN_FORWARD 0x0001
312#define MNTSCAN_REVERSE 0x0002
313#define MNTSCAN_NOBUSY 0x0004
314
315#define MNTINS_FIRST 0x0001
316#define MNTINS_LAST 0x0002
317
318/*
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319 * Sysctl CTL_VFS definitions.
320 *
321 * Second level identifier specifies which filesystem. Second level
322 * identifier VFS_VFSCONF returns information about all filesystems.
323 * Second level identifier VFS_GENERIC is non-terminal.
324 */
325#define VFS_VFSCONF 0 /* get configured filesystems */
326#define VFS_GENERIC 0 /* generic filesystem information */
327/*
328 * Third level identifiers for VFS_GENERIC are given below; third
329 * level identifiers for specific filesystems are given in their
330 * mount specific header files.
331 */
332#define VFS_MAXTYPENUM 1 /* int: highest defined filesystem type */
333#define VFS_CONF 2 /* struct: vfsconf for filesystem given
334 as next argument */
335
336/*
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337 * VFS MPLOCK helper.
338 */
3b998fa9 339#define VFS_MPLOCK_DECLARE int xlock_mpsafe
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340
341#define VFS_MPLOCK1(mp) VFS_MPLOCK_FLAG(mp, MNTK_MPSAFE)
342
343#define VFS_MPLOCK2(mp) \
344 do { \
345 if (xlock_mpsafe) { \
346 get_mplock(); /* TEMPORARY */ \
3b998fa9 347 lwkt_gettoken(&mp->mnt_token); \
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348 xlock_mpsafe = 0; \
349 } \
350 } while(0)
351
352#define VFS_MPLOCK_FLAG(mp, flag) \
353 do { \
354 if (mp->mnt_kern_flag & flag) { \
355 xlock_mpsafe = 1; \
356 } else { \
357 get_mplock(); /* TEMPORARY */ \
3b998fa9 358 lwkt_gettoken(&mp->mnt_token); \
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359 xlock_mpsafe = 0; \
360 } \
361 } while(0)
362
363#define VFS_MPUNLOCK(mp) \
364 do { \
365 if (xlock_mpsafe == 0) { \
3b998fa9 366 lwkt_reltoken(&mp->mnt_token); \
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367 rel_mplock(); /* TEMPORARY */ \
368 } \
369 } while(0)
370
371/*
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372 * Flags for various system call interfaces.
373 *
374 * waitfor flags to vfs_sync() and getfsstat()
375 */
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376#define MNT_WAIT 0x0001 /* synchronously wait for I/O to complete */
377#define MNT_NOWAIT 0x0002 /* start all I/O, but do not wait for it */
378#define MNT_LAZY 0x0004 /* be lazy and do not necessarily push it all */
984263bc 379
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380#define VOP_FSYNC_SYSCALL 0x0001 /* from system call */
381
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382/*
383 * Generic file handle
384 */
385struct fhandle {
386 fsid_t fh_fsid; /* File system id of mount point */
387 struct fid fh_fid; /* File sys specific id */
388};
389typedef struct fhandle fhandle_t;
390
391/*
392 * Export arguments for local filesystem mount calls.
393 */
394struct export_args {
395 int ex_flags; /* export related flags */
396 uid_t ex_root; /* mapping for root uid */
397 struct ucred ex_anon; /* mapping for anonymous user */
398 struct sockaddr *ex_addr; /* net address to which exported */
399 int ex_addrlen; /* and the net address length */
400 struct sockaddr *ex_mask; /* mask of valid bits in saddr */
401 int ex_masklen; /* and the smask length */
402 char *ex_indexfile; /* index file for WebNFS URLs */
403};
404
405/*
406 * Structure holding information for a publicly exported filesystem
407 * (WebNFS). Currently the specs allow just for one such filesystem.
408 */
409struct nfs_public {
410 int np_valid; /* Do we hold valid information */
411 fhandle_t np_handle; /* Filehandle for pub fs (internal) */
412 struct mount *np_mount; /* Mountpoint of exported fs */
413 char *np_index; /* Index file */
414};
415
416/*
417 * Filesystem configuration information. One of these exists for each
418 * type of filesystem supported by the kernel. These are searched at
419 * mount time to identify the requested filesystem.
420 */
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421#ifndef _SYS_QUEUE_H_
422#include <sys/queue.h>
423#endif
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424struct vfsconf {
425 struct vfsops *vfc_vfsops; /* filesystem operations vector */
426 char vfc_name[MFSNAMELEN]; /* filesystem type name */
427 int vfc_typenum; /* historic filesystem type number */
428 int vfc_refcount; /* number mounted of this type */
429 int vfc_flags; /* permanent flags */
2613053d 430 STAILQ_ENTRY(vfsconf) vfc_next; /* next in list */
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431};
432
433struct ovfsconf {
434 void *vfc_vfsops;
435 char vfc_name[32];
436 int vfc_index;
437 int vfc_refcount;
438 int vfc_flags;
439};
440
441/*
442 * NB: these flags refer to IMPLEMENTATION properties, not properties of
443 * any actual mounts; i.e., it does not make sense to change the flags.
444 */
445#define VFCF_STATIC 0x00010000 /* statically compiled into kernel */
446#define VFCF_NETWORK 0x00020000 /* may get data over the network */
447#define VFCF_READONLY 0x00040000 /* writes are not implemented */
448#define VFCF_SYNTHETIC 0x00080000 /* data does not represent real files */
449#define VFCF_LOOPBACK 0x00100000 /* aliases some other mounted FS */
450#define VFCF_UNICODE 0x00200000 /* stores file names as Unicode*/
451
452#ifdef _KERNEL
453
454#ifdef MALLOC_DECLARE
455MALLOC_DECLARE(M_MOUNT);
456#endif
984263bc 457extern int nfs_mount_type; /* vfc_typenum for nfs, or -1 */
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458
459struct vfsconf *vfsconf_find_by_name(const char *);
460struct vfsconf *vfsconf_find_by_typenum(int);
461int vfsconf_get_maxtypenum(void);
462int vfsconf_each(int (*)(struct vfsconf *, void *), void *);
984263bc 463
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464#endif
465
466#if defined(_KERNEL) || defined(_KERNEL_STRUCTURES)
467
468TAILQ_HEAD(mntlist, mount); /* struct mntlist */
469
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470/*
471 * Operations supported on mounted file system.
472 */
473#ifdef __STDC__
21739618 474struct nlookupdata;
fad57d0e 475struct nlookupdata;
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476struct mbuf;
477#endif
478
43c45e8f 479typedef int vfs_mount_t(struct mount *mp, char *path, caddr_t data,
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480 struct ucred *cred);
481typedef int vfs_start_t(struct mount *mp, int flags);
482typedef int vfs_unmount_t(struct mount *mp, int mntflags);
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483typedef int vfs_root_t(struct mount *mp, struct vnode **vpp);
484typedef int vfs_quotactl_t(struct mount *mp, int cmds, uid_t uid, caddr_t arg,
acde96db 485 struct ucred *cred);
43c45e8f 486typedef int vfs_statfs_t(struct mount *mp, struct statfs *sbp,
acde96db 487 struct ucred *cred);
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488typedef int vfs_statvfs_t(struct mount *mp, struct statvfs *sbp,
489 struct ucred *cred);
87de5057 490typedef int vfs_sync_t(struct mount *mp, int waitfor);
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491typedef int vfs_vget_t(struct mount *mp, struct vnode *dvp,
492 ino_t ino, struct vnode **vpp);
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493typedef int vfs_fhtovp_t(struct mount *mp, struct vnode *rootvp,
494 struct fid *fhp, struct vnode **vpp);
43c45e8f 495typedef int vfs_checkexp_t(struct mount *mp, struct sockaddr *nam,
b153f746 496 int *extflagsp, struct ucred **credanonp);
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497typedef int vfs_vptofh_t(struct vnode *vp, struct fid *fhp);
498typedef int vfs_init_t(struct vfsconf *);
499typedef int vfs_uninit_t(struct vfsconf *);
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500typedef int vfs_extattrctl_t(struct mount *mp, int cmd, struct vnode *vp,
501 int attrnamespace, const char *attrname,
502 struct ucred *cred);
43c45e8f 503
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504int vfs_mount(struct mount *mp, char *path, caddr_t data, struct ucred *cred);
505int vfs_start(struct mount *mp, int flags);
506int vfs_unmount(struct mount *mp, int mntflags);
507int vfs_root(struct mount *mp, struct vnode **vpp);
508int vfs_quotactl(struct mount *mp, int cmds, uid_t uid, caddr_t arg,
509 struct ucred *cred);
510int vfs_statfs(struct mount *mp, struct statfs *sbp, struct ucred *cred);
511int vfs_statvfs(struct mount *mp, struct statvfs *sbp, struct ucred *cred);
512int vfs_sync(struct mount *mp, int waitfor);
513int vfs_vget(struct mount *mp, struct vnode *dvp,
514 ino_t ino, struct vnode **vpp);
515int vfs_fhtovp(struct mount *mp, struct vnode *rootvp,
516 struct fid *fhp, struct vnode **vpp);
517int vfs_checkexp(struct mount *mp, struct sockaddr *nam,
518 int *extflagsp, struct ucred **credanonp);
519int vfs_vptofh(struct vnode *vp, struct fid *fhp);
520int vfs_init(struct vfsconf *vfc);
521int vfs_uninit(struct vfsconf *vfc, struct vfsconf *vfsp);
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522int vfs_extattrctl(struct mount *mp, int cmd, struct vnode *vp,
523 int attrnamespace, const char *attrname,
524 struct ucred *cred);
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525
526
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527struct vfsops {
528 vfs_mount_t *vfs_mount;
529 vfs_start_t *vfs_start;
530 vfs_unmount_t *vfs_unmount;
531 vfs_root_t *vfs_root;
532 vfs_quotactl_t *vfs_quotactl;
533 vfs_statfs_t *vfs_statfs;
534 vfs_sync_t *vfs_sync;
535 vfs_vget_t *vfs_vget;
536 vfs_fhtovp_t *vfs_fhtovp;
537 vfs_checkexp_t *vfs_checkexp;
538 vfs_vptofh_t *vfs_vptofh;
539 vfs_init_t *vfs_init;
540 vfs_uninit_t *vfs_uninit;
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541 vfs_extattrctl_t *vfs_extattrctl;
542 vfs_statvfs_t *vfs_statvfs;
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543};
544
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545#define VFS_MOUNT(MP, PATH, DATA, CRED) \
546 vfs_mount(MP, PATH, DATA, CRED)
547#define VFS_START(MP, FLAGS) \
548 vfs_start(MP, FLAGS)
549#define VFS_UNMOUNT(MP, FORCE) \
550 vfs_unmount(MP, FORCE)
551#define VFS_ROOT(MP, VPP) \
552 vfs_root(MP, VPP)
553#define VFS_QUOTACTL(MP, C, U, A, CRED) \
554 vfs_quotactl(MP, C, U, A, CRED)
555#define VFS_STATFS(MP, SBP, CRED) \
556 vfs_statfs(MP, SBP, CRED)
557#define VFS_STATVFS(MP, SBP, CRED) \
558 vfs_statvfs(MP, SBP, CRED)
559#define VFS_SYNC(MP, WAIT) \
560 vfs_sync(MP, WAIT)
561#define VFS_VGET(MP, DVP, INO, VPP) \
562 vfs_vget(MP, DVP, INO, VPP)
67863d04 563#define VFS_FHTOVP(MP, ROOTVP, FIDP, VPP) \
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564 vfs_fhtovp(MP, ROOTVP, FIDP, VPP)
565#define VFS_VPTOFH(VP, FIDP) \
566 vfs_vptofh(VP, FIDP)
567#define VFS_CHECKEXP(MP, NAM, EXFLG, CRED) \
568 vfs_checkexp(MP, NAM, EXFLG, CRED)
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569#define VFS_EXTATTRCTL(MP, C, FVP, NS, N, CRED) \
570 vfs_extattrctl(MP, C, FVP, NS, N, CRED)
984263bc 571
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572#endif
573
574#ifdef _KERNEL
575
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576#include <sys/module.h>
577
578#define VFS_SET(vfsops, fsname, flags) \
579 static struct vfsconf fsname ## _vfsconf = { \
580 &vfsops, \
581 #fsname, \
582 -1, \
583 0, \
58661e79 584 flags, \
37c1c8fc 585 { NULL }, \
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586 }; \
587 static moduledata_t fsname ## _mod = { \
588 #fsname, \
589 vfs_modevent, \
590 & fsname ## _vfsconf \
591 }; \
592 DECLARE_MODULE(fsname, fsname ## _mod, SI_SUB_VFS, SI_ORDER_MIDDLE)
593
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594#endif
595
596#if defined(_KERNEL) || defined(_KERNEL_STRUCTURES)
597
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598#include <net/radix.h>
599
fbb5a20f 600#define AF_MAX 36 /* XXX */
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601
602/*
603 * Network address lookup element
604 */
605struct netcred {
606 struct radix_node netc_rnodes[2];
607 int netc_exflags;
608 struct ucred netc_anon;
609};
610
611/*
612 * Network export information
613 */
614struct netexport {
615 struct netcred ne_defexported; /* Default export */
616 struct radix_node_head *ne_rtable[AF_MAX+1]; /* Individual exports */
617};
618
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619#endif
620
621#ifdef _KERNEL
622
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623extern char *mountrootfsname;
624
625/*
626 * exported vnode operations
627 */
acde96db 628int dounmount (struct mount *, int);
984263bc 629int vfs_setpublicfs /* set publicly exported fs */
1aa89f17 630 (struct mount *, struct netexport *, const struct export_args *);
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631int vfs_lock (struct mount *); /* lock a vfs */
632void vfs_msync (struct mount *, int);
633void vfs_unlock (struct mount *); /* unlock a vfs */
f9642f56 634int vfs_busy (struct mount *, int);
6bdbb368 635void vfs_bufstats(void);
984263bc 636int vfs_export /* process mount export info */
1aa89f17 637 (struct mount *, struct netexport *, const struct export_args *);
984263bc 638struct netcred *vfs_export_lookup /* lookup host in fs export list */
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639 (struct mount *, struct netexport *, struct sockaddr *);
640int vfs_allocate_syncvnode (struct mount *);
641void vfs_getnewfsid (struct mount *);
67863d04 642int vfs_setfsid(struct mount *mp, fsid_t *template);
b13267a5 643cdev_t vfs_getrootfsid (struct mount *);
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644struct mount *vfs_getvfs (fsid_t *); /* return vfs given fsid */
645int vfs_modevent (module_t, int, void *);
646int vfs_mountedon (struct vnode *); /* is a vfs mounted on vp */
647int vfs_rootmountalloc (char *, char *, struct mount **);
f9642f56 648void vfs_unbusy (struct mount *);
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649void vfs_unmountall (void);
650int vfs_register (struct vfsconf *);
651int vfs_unregister (struct vfsconf *);
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652extern struct nfs_public nfs_pub;
653
654/*
655 * Declarations for these vfs default operations are located in
656 * kern/vfs_default.c, they should be used instead of making "dummy"
657 * functions or casting entries in the VFS op table to "enopnotsupp()".
658 */
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659vfs_start_t vfs_stdstart;
660vfs_mount_t vfs_stdmount;
661vfs_unmount_t vfs_stdunmount;
662vfs_root_t vfs_stdroot;
663vfs_quotactl_t vfs_stdquotactl;
664vfs_statfs_t vfs_stdstatfs;
d9fad06e 665vfs_statvfs_t vfs_stdstatvfs;
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666vfs_sync_t vfs_stdsync;
667vfs_sync_t vfs_stdnosync;
668vfs_vget_t vfs_stdvget;
669vfs_fhtovp_t vfs_stdfhtovp;
670vfs_checkexp_t vfs_stdcheckexp;
671vfs_vptofh_t vfs_stdvptofh;
672vfs_init_t vfs_stdinit;
673vfs_uninit_t vfs_stduninit;
acde96db 674vfs_extattrctl_t vfs_stdextattrctl;
43c45e8f 675
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676struct vop_access_args;
677int vop_helper_access(struct vop_access_args *ap, uid_t ino_uid, gid_t ino_gid,
fb356552 678 mode_t ino_mode, u_int32_t ino_flags);
1399fa3b 679int vop_helper_setattr_flags(u_int32_t *ino_flags, u_int32_t vaflags,
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680 uid_t uid, struct ucred *cred);
681uid_t vop_helper_create_uid(struct mount *mp, mode_t dmode, uid_t duid,
682 struct ucred *cred, mode_t *modep);
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683int vop_helper_chmod(struct vnode *vp, mode_t new_mode, struct ucred *cred,
684 uid_t cur_uid, gid_t cur_gid, mode_t *cur_modep);
685int vop_helper_chown(struct vnode *vp, uid_t new_uid, gid_t new_gid,
686 struct ucred *cred,
687 uid_t *cur_uidp, gid_t *cur_gidp, mode_t *cur_modep);
1399fa3b 688
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689void add_bio_ops(struct bio_ops *ops);
690void rem_bio_ops(struct bio_ops *ops);
9340415c 691
2281065e 692int journal_mountctl(struct vop_mountctl_args *ap);
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693void journal_remove_all_journals(struct mount *mp, int flags);
694
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695void mountlist_insert(struct mount *, int);
696int mountlist_interlock(int (*callback)(struct mount *), struct mount *);
697struct mount *mountlist_boot_getfirst(void);
698void mountlist_remove(struct mount *mp);
699int mountlist_scan(int (*callback)(struct mount *, void *), void *, int);
5b4cfb7e 700struct mount *mount_get_by_nc(struct namecache *ncp);
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701#else /* !_KERNEL */
702
703#include <sys/cdefs.h>
704
705__BEGIN_DECLS
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706int fstatfs (int, struct statfs *);
707int getfh (const char *, fhandle_t *);
708int getfsstat (struct statfs *, long, int);
709int getmntinfo (struct statfs **, int);
0e735c8f 710int getmntvinfo (struct statfs **, struct statvfs **, int);
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711int mount (const char *, const char *, int, void *);
712int statfs (const char *, struct statfs *);
713int unmount (const char *, int);
714int fhopen (const struct fhandle *, int);
715int fhstat (const struct fhandle *, struct stat *);
716int fhstatfs (const struct fhandle *, struct statfs *);
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717
718/* C library stuff */
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719void endvfsent (void);
720struct ovfsconf *getvfsbyname (const char *);
721struct ovfsconf *getvfsbytype (int);
722struct ovfsconf *getvfsent (void);
984263bc 723#define getvfsbyname new_getvfsbyname
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724int new_getvfsbyname (const char *, struct vfsconf *);
725void setvfsent (int);
726int vfsisloadable (const char *);
727int vfsload (const char *);
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728__END_DECLS
729
730#endif /* _KERNEL */
731
732#endif /* !_SYS_MOUNT_H_ */
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