vquota(8): add code to manage hard links
[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>
95bf5f78 42#include <sys/tree.h>
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43
44#ifndef _KERNEL
45#if !defined(_POSIX_C_SOURCE) && !defined(_XOPEN_SOURCE)
46#include <sys/stat.h>
47#endif /* !_POSIX_C_SOURCE */
48#endif /* !_KERNEL */
49
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50#if defined(_KERNEL) || defined(_KERNEL_STRUCTURES)
51#ifndef _SYS_QUEUE_H_
984263bc 52#include <sys/queue.h>
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53#endif
54#ifndef _SYS_LOCK_H_
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55#include <sys/lock.h>
56#endif
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57#ifndef _SYS_NAMECACHE_H_
58#include <sys/namecache.h>
59#endif
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60#ifndef _SYS_STATVFS_H_
61#include <sys/statvfs.h>
62#endif
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63#ifndef _SYS_THREAD_H_
64#include <sys/thread.h>
65#endif
e788edda 66#include <sys/vfs_quota.h>
03d6a592 67#endif
984263bc 68
dadab5e9 69struct thread;
2281065e 70struct journal;
0961aa92 71struct vop_ops;
2281065e 72struct vop_mountctl_args;
0e735c8f 73struct statvfs;
dadab5e9 74
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75typedef struct fsid { int32_t val[2]; } fsid_t; /* file system id type */
76
77/*
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78 * File identifier. These are unique per filesystem on a single machine.
79 *
80 * fix_ext is also used by HAMMER.
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81 */
82#define MAXFIDSZ 16
83
84struct fid {
85 u_short fid_len; /* length of data in bytes */
3e3a527f 86 u_short fid_ext; /* extended data */
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87 char fid_data[MAXFIDSZ]; /* data (variable length) */
88};
89
90/*
91 * file system statistics
92 */
93
94#define MFSNAMELEN 16 /* length of fs type name, including null */
984263bc 95#define MNAMELEN 80 /* length of buffer for returned name */
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96
97struct statfs {
98 long f_spare2; /* placeholder */
99 long f_bsize; /* fundamental file system block size */
100 long f_iosize; /* optimal transfer block size */
101 long f_blocks; /* total data blocks in file system */
102 long f_bfree; /* free blocks in fs */
103 long f_bavail; /* free blocks avail to non-superuser */
104 long f_files; /* total file nodes in file system */
105 long f_ffree; /* free file nodes in fs */
106 fsid_t f_fsid; /* file system id */
107 uid_t f_owner; /* user that mounted the filesystem */
108 int f_type; /* type of filesystem */
109 int f_flags; /* copy of mount exported flags */
110 long f_syncwrites; /* count of sync writes since mount */
111 long f_asyncwrites; /* count of async writes since mount */
112 char f_fstypename[MFSNAMELEN]; /* fs type name */
113 char f_mntonname[MNAMELEN]; /* directory on which mounted */
114 long f_syncreads; /* count of sync reads since mount */
115 long f_asyncreads; /* count of async reads since mount */
116 short f_spares1; /* unused spare */
117 char f_mntfromname[MNAMELEN];/* mounted filesystem */
118 short f_spares2; /* unused spare */
119 long f_spare[2]; /* unused spare */
120};
121
ec12abe0 122#if defined(_KERNEL) || defined(_KERNEL_STRUCTURES)
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123
124/*
125 * bio_ops are associated with the mount structure and used in conjuction
126 * with the b_dep field in a buffer. Currently softupdates and HAMMER
127 * utilize this field.
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128 *
129 * All bio_ops callbacks must be MPSAFE and could be called without
130 * the mplock.
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131 */
132struct buf;
133
134struct bio_ops {
135 TAILQ_ENTRY(bio_ops) entry;
136 void (*io_start) (struct buf *);
137 void (*io_complete) (struct buf *);
138 void (*io_deallocate) (struct buf *);
139 int (*io_fsync) (struct vnode *);
140 int (*io_sync) (struct mount *);
141 void (*io_movedeps) (struct buf *, struct buf *);
142 int (*io_countdeps) (struct buf *, int);
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143 int (*io_checkread) (struct buf *);
144 int (*io_checkwrite) (struct buf *);
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145};
146
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147/*
148 * storage accounting
149 *
150 * uids and gids often come in contiguous blocks; use a small linear
151 * array as the basic in-memory accounting allocation unit
152 */
153#define ACCT_CHUNK_BITS 5
154#define ACCT_CHUNK_NIDS (1<<ACCT_CHUNK_BITS)
155#define ACCT_CHUNK_MASK (ACCT_CHUNK_NIDS - 1)
156
157struct ac_unode {
158 RB_ENTRY(ac_unode) rb_entry;
159 uid_t left_bits;
160 uint64_t uid_chunk[ACCT_CHUNK_NIDS];
161};
162
163struct ac_gnode {
164 RB_ENTRY(ac_gnode) rb_entry;
165 gid_t left_bits;
166 uint64_t gid_chunk[ACCT_CHUNK_NIDS];
167};
168
169struct vfs_acct {
170 RB_HEAD(ac_utree,ac_unode) ac_uroot;
171 RB_HEAD(ac_gtree,ac_gnode) ac_groot;
172 uint64_t ac_bytes; /* total bytes used */
173 struct spinlock ac_spin; /* protective spinlock */
174};
175
176
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177/*
178 * Structure per mounted file system. Each mounted file system has an
179 * array of operations and an instance record. The file systems are
180 * put on a doubly linked list.
181 *
182 * NOTE: mnt_nvnodelist and mnt_reservedvnlist. At the moment vnodes
183 * are linked into mnt_nvnodelist. At some point in the near future the
184 * vnode list will be split into a 'dirty' and 'clean' list. mnt_nvnodelist
185 * will become the dirty list and mnt_reservedvnlist will become the 'clean'
186 * list. Filesystem kld's syncing code should remain compatible since
187 * they only need to scan the dirty vnode list (nvnodelist -> dirtyvnodelist).
41a01a4d 188 *
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189 * NOTE: All VFSs must at least populate mnt_vn_ops or those VOP ops that
190 * only take namecache pointers will not be able to find their operations
191 * vector via namecache->nc_mount.
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192 *
193 * MPSAFE NOTES: mnt_lock interlocks mounting and unmounting operations.
194 *
195 * mnt_token interlocks operations which adjust the mount
196 * structure and will also be held through VFS operations
197 * for VFSes not flagged MPSAFE.
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198 */
199TAILQ_HEAD(vnodelst, vnode);
2281065e 200TAILQ_HEAD(journallst, journal);
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201
202struct mount {
203 TAILQ_ENTRY(mount) mnt_list; /* mount list */
204 struct vfsops *mnt_op; /* operations on fs */
205 struct vfsconf *mnt_vfc; /* configuration info */
4b5bbb78 206 long mnt_namecache_gen; /* ++ to clear negative hits */
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207 struct vnode *mnt_syncer; /* syncer vnode */
208 struct vnodelst mnt_nvnodelist; /* list of vnodes this mount */
209 struct lock mnt_lock; /* mount structure lock */
210 int mnt_flag; /* flags shared with user */
211 int mnt_kern_flag; /* kernel only flags */
212 int mnt_maxsymlinklen; /* max size of short symlink */
213 struct statfs mnt_stat; /* cache of filesystem stats */
d9fad06e 214 struct statvfs mnt_vstat; /* extended stats */
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215 qaddr_t mnt_data; /* private data */
216 time_t mnt_time; /* last time written*/
217 u_int mnt_iosize_max; /* max IO request size */
218 struct vnodelst mnt_reservedvnlist; /* (future) dirty vnode list */
219 int mnt_nvnodelistsize; /* # of vnodes on this mount */
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220
221 /*
222 * ops vectors have a fixed stacking order. All primary calls run
223 * through mnt_vn_ops. This field is typically assigned to
224 * mnt_vn_norm_ops. If journaling has been enabled this field is
225 * usually assigned to mnt_vn_journal_ops.
226 */
227 struct vop_ops *mnt_vn_use_ops; /* current ops set */
228
229 struct vop_ops *mnt_vn_coherency_ops; /* cache coherency ops */
230 struct vop_ops *mnt_vn_journal_ops; /* journaling ops */
231 struct vop_ops *mnt_vn_norm_ops; /* for use by the VFS */
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232 struct vop_ops *mnt_vn_spec_ops; /* for use by the VFS */
233 struct vop_ops *mnt_vn_fifo_ops; /* for use by the VFS */
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234 struct nchandle mnt_ncmountpt; /* mount point */
235 struct nchandle mnt_ncmounton; /* mounted on */
236 int mnt_refs; /* nchandle references */
aac0aabd 237 struct lwkt_token mnt_token; /* token lock if not MPSAFE */
2281065e 238 struct journallst mnt_jlist; /* list of active journals */
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239 u_int8_t *mnt_jbitmap; /* streamid bitmap */
240 int16_t mnt_streamid; /* last streamid */
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241
242 struct bio_ops *mnt_bioops; /* BIO ops (hammer, softupd) */
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243
244 struct vfs_acct mnt_acct; /* vfs space accounting */
984263bc 245};
2281065e 246
ec12abe0 247#endif /* _KERNEL || _KERNEL_STRUCTURES */
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248
249/*
250 * User specifiable flags.
251 */
252#define MNT_RDONLY 0x00000001 /* read only filesystem */
253#define MNT_SYNCHRONOUS 0x00000002 /* file system written synchronously */
254#define MNT_NOEXEC 0x00000004 /* can't exec from filesystem */
255#define MNT_NOSUID 0x00000008 /* don't honor setuid bits on fs */
256#define MNT_NODEV 0x00000010 /* don't interpret special files */
257#define MNT_UNION 0x00000020 /* union with underlying filesystem */
258#define MNT_ASYNC 0x00000040 /* file system written asynchronously */
259#define MNT_SUIDDIR 0x00100000 /* special handling of SUID on dirs */
260#define MNT_SOFTDEP 0x00200000 /* soft updates being done */
261#define MNT_NOSYMFOLLOW 0x00400000 /* do not follow symlinks */
e0fb398b 262#define MNT_TRIM 0x01000000 /* Enable online FS trimming */
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263#define MNT_NOATIME 0x10000000 /* disable update of file access time */
264#define MNT_NOCLUSTERR 0x40000000 /* disable cluster read */
265#define MNT_NOCLUSTERW 0x80000000 /* disable cluster write */
266
267/*
268 * NFS export related mount flags.
269 */
270#define MNT_EXRDONLY 0x00000080 /* exported read only */
271#define MNT_EXPORTED 0x00000100 /* file system is exported */
272#define MNT_DEFEXPORTED 0x00000200 /* exported to the world */
273#define MNT_EXPORTANON 0x00000400 /* use anon uid mapping for everyone */
274#define MNT_EXKERB 0x00000800 /* exported with Kerberos uid mapping */
275#define MNT_EXPUBLIC 0x20000000 /* public export (WebNFS) */
276
277/*
278 * Flags set by internal operations,
279 * but visible to the user.
280 * XXX some of these are not quite right.. (I've never seen the root flag set)
281 */
282#define MNT_LOCAL 0x00001000 /* filesystem is stored locally */
283#define MNT_QUOTA 0x00002000 /* quotas are enabled on filesystem */
284#define MNT_ROOTFS 0x00004000 /* identifies the root filesystem */
285#define MNT_USER 0x00008000 /* mounted by a user */
a3dce641 286#define MNT_ACCOUNTING 0x00020000 /* accounting is enabled on filesystem */
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287#define MNT_IGNORE 0x00800000 /* do not show entry in df */
288
289/*
290 * Mask of flags that are visible to statfs()
291 * XXX I think that this could now become (~(MNT_CMDFLAGS))
292 * but the 'mount' program may need changing to handle this.
293 */
294#define MNT_VISFLAGMASK (MNT_RDONLY | MNT_SYNCHRONOUS | MNT_NOEXEC | \
295 MNT_NOSUID | MNT_NODEV | MNT_UNION | \
296 MNT_ASYNC | MNT_EXRDONLY | MNT_EXPORTED | \
297 MNT_DEFEXPORTED | MNT_EXPORTANON| MNT_EXKERB | \
298 MNT_LOCAL | MNT_USER | MNT_QUOTA | \
299 MNT_ROOTFS | MNT_NOATIME | MNT_NOCLUSTERR| \
300 MNT_NOCLUSTERW | MNT_SUIDDIR | MNT_SOFTDEP | \
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301 MNT_IGNORE | MNT_NOSYMFOLLOW | MNT_EXPUBLIC| \
302 MNT_ACCOUNTING | MNT_TRIM)
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303/*
304 * External filesystem command modifier flags.
305 * Unmount can use the MNT_FORCE flag.
306 * XXX These are not STATES and really should be somewhere else.
307 */
308#define MNT_UPDATE 0x00010000 /* not a real mount, just an update */
309#define MNT_DELEXPORT 0x00020000 /* delete export host lists */
310#define MNT_RELOAD 0x00040000 /* reload filesystem data */
311#define MNT_FORCE 0x00080000 /* force unmount or readonly change */
312#define MNT_CMDFLAGS (MNT_UPDATE|MNT_DELEXPORT|MNT_RELOAD|MNT_FORCE)
313/*
314 * Internal filesystem control flags stored in mnt_kern_flag.
315 *
316 * MNTK_UNMOUNT locks the mount entry so that name lookup cannot proceed
317 * past the mount point. This keeps the subtree stable during mounts
318 * and unmounts.
319 *
320 * MNTK_UNMOUNTF permits filesystems to detect a forced unmount while
321 * dounmount() is still waiting to lock the mountpoint. This allows
322 * the filesystem to cancel operations that might otherwise deadlock
323 * with the unmount attempt (used by NFS).
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324 *
325 * MNTK_NOSTKMNT prevents mounting another filesystem inside the flagged one.
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326 */
327#define MNTK_UNMOUNTF 0x00000001 /* forced unmount in progress */
aac0aabd 328#define MNTK_MPSAFE 0x00010000 /* call vops without mnt_token lock */
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329#define MNTK_RD_MPSAFE 0x00020000 /* vop_read is MPSAFE */
330#define MNTK_WR_MPSAFE 0x00040000 /* vop_write is MPSAFE */
331#define MNTK_GA_MPSAFE 0x00080000 /* vop_getattr is MPSAFE */
332#define MNTK_IN_MPSAFE 0x00100000 /* vop_inactive is MPSAFE */
7a2de9a4 333#define MNTK_SG_MPSAFE 0x00200000 /* vop_strategy is MPSAFE */
28623bf9 334#define MNTK_NCALIASED 0x00800000 /* namecached aliased */
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335#define MNTK_UNMOUNT 0x01000000 /* unmount in progress */
336#define MNTK_MWAIT 0x02000000 /* waiting for unmount to finish */
337#define MNTK_WANTRDWR 0x04000000 /* upgrade to read/write requested */
66a1ddf5 338#define MNTK_FSMID 0x08000000 /* getattr supports FSMIDs */
5dc91765 339#define MNTK_NOSTKMNT 0x10000000 /* no stacked mount point allowed */
2bc7505b 340#define MNTK_NOMSYNC 0x20000000 /* used by tmpfs */
984263bc 341
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342#define MNTK_ALL_MPSAFE (MNTK_MPSAFE | MNTK_RD_MPSAFE | MNTK_WR_MPSAFE | \
343 MNTK_GA_MPSAFE | MNTK_IN_MPSAFE | MNTK_SG_MPSAFE)
344
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345/*
346 * mountlist_*() defines
347 */
348#define MNTSCAN_FORWARD 0x0001
349#define MNTSCAN_REVERSE 0x0002
350#define MNTSCAN_NOBUSY 0x0004
351
352#define MNTINS_FIRST 0x0001
353#define MNTINS_LAST 0x0002
354
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355/*
356 * Sysctl CTL_VFS definitions.
357 *
358 * Second level identifier specifies which filesystem. Second level
359 * identifier VFS_VFSCONF returns information about all filesystems.
360 * Second level identifier VFS_GENERIC is non-terminal.
361 */
362#define VFS_VFSCONF 0 /* get configured filesystems */
363#define VFS_GENERIC 0 /* generic filesystem information */
364/*
365 * Third level identifiers for VFS_GENERIC are given below; third
366 * level identifiers for specific filesystems are given in their
367 * mount specific header files.
368 */
369#define VFS_MAXTYPENUM 1 /* int: highest defined filesystem type */
370#define VFS_CONF 2 /* struct: vfsconf for filesystem given
371 as next argument */
372
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373/*
374 * VFS MPLOCK helper.
375 */
3b998fa9 376#define VFS_MPLOCK_DECLARE int xlock_mpsafe
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377
378#define VFS_MPLOCK1(mp) VFS_MPLOCK_FLAG(mp, MNTK_MPSAFE)
379
380#define VFS_MPLOCK2(mp) \
381 do { \
382 if (xlock_mpsafe) { \
383 get_mplock(); /* TEMPORARY */ \
3b998fa9 384 lwkt_gettoken(&mp->mnt_token); \
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385 xlock_mpsafe = 0; \
386 } \
387 } while(0)
388
389#define VFS_MPLOCK_FLAG(mp, flag) \
390 do { \
391 if (mp->mnt_kern_flag & flag) { \
392 xlock_mpsafe = 1; \
393 } else { \
394 get_mplock(); /* TEMPORARY */ \
3b998fa9 395 lwkt_gettoken(&mp->mnt_token); \
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396 xlock_mpsafe = 0; \
397 } \
398 } while(0)
399
400#define VFS_MPUNLOCK(mp) \
401 do { \
402 if (xlock_mpsafe == 0) { \
3b998fa9 403 lwkt_reltoken(&mp->mnt_token); \
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404 rel_mplock(); /* TEMPORARY */ \
405 } \
406 } while(0)
407
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408/*
409 * Flags for various system call interfaces.
410 *
411 * waitfor flags to vfs_sync() and getfsstat()
412 */
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413#define MNT_WAIT 0x0001 /* synchronously wait for I/O to complete */
414#define MNT_NOWAIT 0x0002 /* start all I/O, but do not wait for it */
415#define MNT_LAZY 0x0004 /* be lazy and do not necessarily push it all */
984263bc 416
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417#define VOP_FSYNC_SYSCALL 0x0001 /* from system call */
418
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419/*
420 * Generic file handle
421 */
422struct fhandle {
423 fsid_t fh_fsid; /* File system id of mount point */
424 struct fid fh_fid; /* File sys specific id */
425};
426typedef struct fhandle fhandle_t;
427
428/*
429 * Export arguments for local filesystem mount calls.
430 */
431struct export_args {
432 int ex_flags; /* export related flags */
433 uid_t ex_root; /* mapping for root uid */
434 struct ucred ex_anon; /* mapping for anonymous user */
435 struct sockaddr *ex_addr; /* net address to which exported */
436 int ex_addrlen; /* and the net address length */
437 struct sockaddr *ex_mask; /* mask of valid bits in saddr */
438 int ex_masklen; /* and the smask length */
439 char *ex_indexfile; /* index file for WebNFS URLs */
440};
441
442/*
443 * Structure holding information for a publicly exported filesystem
444 * (WebNFS). Currently the specs allow just for one such filesystem.
445 */
446struct nfs_public {
447 int np_valid; /* Do we hold valid information */
448 fhandle_t np_handle; /* Filehandle for pub fs (internal) */
449 struct mount *np_mount; /* Mountpoint of exported fs */
450 char *np_index; /* Index file */
451};
452
453/*
454 * Filesystem configuration information. One of these exists for each
455 * type of filesystem supported by the kernel. These are searched at
456 * mount time to identify the requested filesystem.
457 */
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458#ifndef _SYS_QUEUE_H_
459#include <sys/queue.h>
460#endif
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461struct vfsconf {
462 struct vfsops *vfc_vfsops; /* filesystem operations vector */
463 char vfc_name[MFSNAMELEN]; /* filesystem type name */
464 int vfc_typenum; /* historic filesystem type number */
465 int vfc_refcount; /* number mounted of this type */
466 int vfc_flags; /* permanent flags */
2613053d 467 STAILQ_ENTRY(vfsconf) vfc_next; /* next in list */
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468};
469
470struct ovfsconf {
471 void *vfc_vfsops;
472 char vfc_name[32];
473 int vfc_index;
474 int vfc_refcount;
475 int vfc_flags;
476};
477
478/*
479 * NB: these flags refer to IMPLEMENTATION properties, not properties of
480 * any actual mounts; i.e., it does not make sense to change the flags.
481 */
482#define VFCF_STATIC 0x00010000 /* statically compiled into kernel */
483#define VFCF_NETWORK 0x00020000 /* may get data over the network */
484#define VFCF_READONLY 0x00040000 /* writes are not implemented */
485#define VFCF_SYNTHETIC 0x00080000 /* data does not represent real files */
486#define VFCF_LOOPBACK 0x00100000 /* aliases some other mounted FS */
487#define VFCF_UNICODE 0x00200000 /* stores file names as Unicode*/
488
489#ifdef _KERNEL
490
491#ifdef MALLOC_DECLARE
492MALLOC_DECLARE(M_MOUNT);
493#endif
984263bc 494extern int nfs_mount_type; /* vfc_typenum for nfs, or -1 */
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495
496struct vfsconf *vfsconf_find_by_name(const char *);
497struct vfsconf *vfsconf_find_by_typenum(int);
498int vfsconf_get_maxtypenum(void);
499int vfsconf_each(int (*)(struct vfsconf *, void *), void *);
984263bc 500
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501#endif
502
503#if defined(_KERNEL) || defined(_KERNEL_STRUCTURES)
504
505TAILQ_HEAD(mntlist, mount); /* struct mntlist */
506
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507/*
508 * Operations supported on mounted file system.
509 */
510#ifdef __STDC__
21739618 511struct nlookupdata;
fad57d0e 512struct nlookupdata;
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513struct mbuf;
514#endif
515
43c45e8f 516typedef int vfs_mount_t(struct mount *mp, char *path, caddr_t data,
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517 struct ucred *cred);
518typedef int vfs_start_t(struct mount *mp, int flags);
519typedef int vfs_unmount_t(struct mount *mp, int mntflags);
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520typedef int vfs_root_t(struct mount *mp, struct vnode **vpp);
521typedef int vfs_quotactl_t(struct mount *mp, int cmds, uid_t uid, caddr_t arg,
acde96db 522 struct ucred *cred);
43c45e8f 523typedef int vfs_statfs_t(struct mount *mp, struct statfs *sbp,
acde96db 524 struct ucred *cred);
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525typedef int vfs_statvfs_t(struct mount *mp, struct statvfs *sbp,
526 struct ucred *cred);
87de5057 527typedef int vfs_sync_t(struct mount *mp, int waitfor);
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528typedef int vfs_vget_t(struct mount *mp, struct vnode *dvp,
529 ino_t ino, struct vnode **vpp);
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530typedef int vfs_fhtovp_t(struct mount *mp, struct vnode *rootvp,
531 struct fid *fhp, struct vnode **vpp);
43c45e8f 532typedef int vfs_checkexp_t(struct mount *mp, struct sockaddr *nam,
b153f746 533 int *extflagsp, struct ucred **credanonp);
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534typedef int vfs_vptofh_t(struct vnode *vp, struct fid *fhp);
535typedef int vfs_init_t(struct vfsconf *);
536typedef int vfs_uninit_t(struct vfsconf *);
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537typedef int vfs_extattrctl_t(struct mount *mp, int cmd, struct vnode *vp,
538 int attrnamespace, const char *attrname,
539 struct ucred *cred);
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540typedef int vfs_acinit_t(struct mount *mp);
541typedef int vfs_acdone_t(struct mount *mp);
95bf5f78 542typedef void vfs_account_t(struct mount *mp,
1c18cfd0 543 uid_t uid, gid_t gid, int64_t delta);
43c45e8f 544
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545int vfs_mount(struct mount *mp, char *path, caddr_t data, struct ucred *cred);
546int vfs_start(struct mount *mp, int flags);
547int vfs_unmount(struct mount *mp, int mntflags);
548int vfs_root(struct mount *mp, struct vnode **vpp);
549int vfs_quotactl(struct mount *mp, int cmds, uid_t uid, caddr_t arg,
550 struct ucred *cred);
551int vfs_statfs(struct mount *mp, struct statfs *sbp, struct ucred *cred);
552int vfs_statvfs(struct mount *mp, struct statvfs *sbp, struct ucred *cred);
553int vfs_sync(struct mount *mp, int waitfor);
554int vfs_vget(struct mount *mp, struct vnode *dvp,
555 ino_t ino, struct vnode **vpp);
556int vfs_fhtovp(struct mount *mp, struct vnode *rootvp,
557 struct fid *fhp, struct vnode **vpp);
558int vfs_checkexp(struct mount *mp, struct sockaddr *nam,
559 int *extflagsp, struct ucred **credanonp);
560int vfs_vptofh(struct vnode *vp, struct fid *fhp);
561int vfs_init(struct vfsconf *vfc);
562int vfs_uninit(struct vfsconf *vfc, struct vfsconf *vfsp);
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563int vfs_extattrctl(struct mount *mp, int cmd, struct vnode *vp,
564 int attrnamespace, const char *attrname,
565 struct ucred *cred);
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566
567
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568struct vfsops {
569 vfs_mount_t *vfs_mount;
570 vfs_start_t *vfs_start;
571 vfs_unmount_t *vfs_unmount;
572 vfs_root_t *vfs_root;
573 vfs_quotactl_t *vfs_quotactl;
574 vfs_statfs_t *vfs_statfs;
575 vfs_sync_t *vfs_sync;
576 vfs_vget_t *vfs_vget;
577 vfs_fhtovp_t *vfs_fhtovp;
578 vfs_checkexp_t *vfs_checkexp;
579 vfs_vptofh_t *vfs_vptofh;
580 vfs_init_t *vfs_init;
581 vfs_uninit_t *vfs_uninit;
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582 vfs_extattrctl_t *vfs_extattrctl;
583 vfs_statvfs_t *vfs_statvfs;
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584 vfs_acinit_t *vfs_acinit;
585 vfs_acdone_t *vfs_acdone;
1c18cfd0 586 vfs_account_t *vfs_account;
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587};
588
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589#define VFS_MOUNT(MP, PATH, DATA, CRED) \
590 vfs_mount(MP, PATH, DATA, CRED)
591#define VFS_START(MP, FLAGS) \
592 vfs_start(MP, FLAGS)
593#define VFS_UNMOUNT(MP, FORCE) \
594 vfs_unmount(MP, FORCE)
595#define VFS_ROOT(MP, VPP) \
596 vfs_root(MP, VPP)
597#define VFS_QUOTACTL(MP, C, U, A, CRED) \
598 vfs_quotactl(MP, C, U, A, CRED)
599#define VFS_STATFS(MP, SBP, CRED) \
600 vfs_statfs(MP, SBP, CRED)
601#define VFS_STATVFS(MP, SBP, CRED) \
602 vfs_statvfs(MP, SBP, CRED)
603#define VFS_SYNC(MP, WAIT) \
604 vfs_sync(MP, WAIT)
605#define VFS_VGET(MP, DVP, INO, VPP) \
606 vfs_vget(MP, DVP, INO, VPP)
67863d04 607#define VFS_FHTOVP(MP, ROOTVP, FIDP, VPP) \
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608 vfs_fhtovp(MP, ROOTVP, FIDP, VPP)
609#define VFS_VPTOFH(VP, FIDP) \
610 vfs_vptofh(VP, FIDP)
611#define VFS_CHECKEXP(MP, NAM, EXFLG, CRED) \
612 vfs_checkexp(MP, NAM, EXFLG, CRED)
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613#define VFS_EXTATTRCTL(MP, C, FVP, NS, N, CRED) \
614 vfs_extattrctl(MP, C, FVP, NS, N, CRED)
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615#define VFS_ACCOUNT(MP, U, G, D) \
616 if (MP->mnt_op->vfs_account != NULL) \
617 MP->mnt_op->vfs_account(MP, U, G, D);
984263bc 618
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619#endif
620
621#ifdef _KERNEL
622
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623#include <sys/module.h>
624
625#define VFS_SET(vfsops, fsname, flags) \
626 static struct vfsconf fsname ## _vfsconf = { \
627 &vfsops, \
628 #fsname, \
629 -1, \
630 0, \
58661e79 631 flags, \
37c1c8fc 632 { NULL }, \
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633 }; \
634 static moduledata_t fsname ## _mod = { \
635 #fsname, \
636 vfs_modevent, \
637 & fsname ## _vfsconf \
638 }; \
639 DECLARE_MODULE(fsname, fsname ## _mod, SI_SUB_VFS, SI_ORDER_MIDDLE)
640
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641#endif
642
643#if defined(_KERNEL) || defined(_KERNEL_STRUCTURES)
644
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645#include <net/radix.h>
646
fbb5a20f 647#define AF_MAX 36 /* XXX */
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648
649/*
650 * Network address lookup element
651 */
652struct netcred {
653 struct radix_node netc_rnodes[2];
654 int netc_exflags;
655 struct ucred netc_anon;
656};
657
658/*
659 * Network export information
660 */
661struct netexport {
662 struct netcred ne_defexported; /* Default export */
663 struct radix_node_head *ne_rtable[AF_MAX+1]; /* Individual exports */
664};
665
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666#endif
667
668#ifdef _KERNEL
669
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670extern char *mountrootfsname;
671
672/*
673 * exported vnode operations
674 */
acde96db 675int dounmount (struct mount *, int);
984263bc 676int vfs_setpublicfs /* set publicly exported fs */
1aa89f17 677 (struct mount *, struct netexport *, const struct export_args *);
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678int vfs_lock (struct mount *); /* lock a vfs */
679void vfs_msync (struct mount *, int);
680void vfs_unlock (struct mount *); /* unlock a vfs */
f9642f56 681int vfs_busy (struct mount *, int);
6bdbb368 682void vfs_bufstats(void);
984263bc 683int vfs_export /* process mount export info */
1aa89f17 684 (struct mount *, struct netexport *, const struct export_args *);
984263bc 685struct netcred *vfs_export_lookup /* lookup host in fs export list */
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686 (struct mount *, struct netexport *, struct sockaddr *);
687int vfs_allocate_syncvnode (struct mount *);
688void vfs_getnewfsid (struct mount *);
67863d04 689int vfs_setfsid(struct mount *mp, fsid_t *template);
b13267a5 690cdev_t vfs_getrootfsid (struct mount *);
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691struct mount *vfs_getvfs (fsid_t *); /* return vfs given fsid */
692int vfs_modevent (module_t, int, void *);
693int vfs_mountedon (struct vnode *); /* is a vfs mounted on vp */
694int vfs_rootmountalloc (char *, char *, struct mount **);
f9642f56 695void vfs_unbusy (struct mount *);
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696void vfs_unmountall (void);
697int vfs_register (struct vfsconf *);
698int vfs_unregister (struct vfsconf *);
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699extern struct nfs_public nfs_pub;
700
701/*
702 * Declarations for these vfs default operations are located in
703 * kern/vfs_default.c, they should be used instead of making "dummy"
704 * functions or casting entries in the VFS op table to "enopnotsupp()".
705 */
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706vfs_start_t vfs_stdstart;
707vfs_mount_t vfs_stdmount;
708vfs_unmount_t vfs_stdunmount;
709vfs_root_t vfs_stdroot;
710vfs_quotactl_t vfs_stdquotactl;
711vfs_statfs_t vfs_stdstatfs;
d9fad06e 712vfs_statvfs_t vfs_stdstatvfs;
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713vfs_sync_t vfs_stdsync;
714vfs_sync_t vfs_stdnosync;
715vfs_vget_t vfs_stdvget;
716vfs_fhtovp_t vfs_stdfhtovp;
717vfs_checkexp_t vfs_stdcheckexp;
718vfs_vptofh_t vfs_stdvptofh;
719vfs_init_t vfs_stdinit;
720vfs_uninit_t vfs_stduninit;
acde96db 721vfs_extattrctl_t vfs_stdextattrctl;
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722vfs_acinit_t vfs_stdac_init;
723vfs_acdone_t vfs_stdac_done;
1c18cfd0 724vfs_account_t vfs_stdaccount;
e788edda 725vfs_account_t vfs_noaccount;
43c45e8f 726
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727struct vop_access_args;
728int vop_helper_access(struct vop_access_args *ap, uid_t ino_uid, gid_t ino_gid,
fb356552 729 mode_t ino_mode, u_int32_t ino_flags);
1399fa3b 730int vop_helper_setattr_flags(u_int32_t *ino_flags, u_int32_t vaflags,
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731 uid_t uid, struct ucred *cred);
732uid_t vop_helper_create_uid(struct mount *mp, mode_t dmode, uid_t duid,
733 struct ucred *cred, mode_t *modep);
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734int vop_helper_chmod(struct vnode *vp, mode_t new_mode, struct ucred *cred,
735 uid_t cur_uid, gid_t cur_gid, mode_t *cur_modep);
736int vop_helper_chown(struct vnode *vp, uid_t new_uid, gid_t new_gid,
737 struct ucred *cred,
738 uid_t *cur_uidp, gid_t *cur_gidp, mode_t *cur_modep);
1399fa3b 739
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740void add_bio_ops(struct bio_ops *ops);
741void rem_bio_ops(struct bio_ops *ops);
9340415c 742
2281065e 743int journal_mountctl(struct vop_mountctl_args *ap);
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744void journal_remove_all_journals(struct mount *mp, int flags);
745
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746void mountlist_insert(struct mount *, int);
747int mountlist_interlock(int (*callback)(struct mount *), struct mount *);
748struct mount *mountlist_boot_getfirst(void);
749void mountlist_remove(struct mount *mp);
750int mountlist_scan(int (*callback)(struct mount *, void *), void *, int);
5b4cfb7e 751struct mount *mount_get_by_nc(struct namecache *ncp);
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752#else /* !_KERNEL */
753
754#include <sys/cdefs.h>
755
756__BEGIN_DECLS
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757int fstatfs (int, struct statfs *);
758int getfh (const char *, fhandle_t *);
759int getfsstat (struct statfs *, long, int);
760int getmntinfo (struct statfs **, int);
0e735c8f 761int getmntvinfo (struct statfs **, struct statvfs **, int);
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762int mount (const char *, const char *, int, void *);
763int statfs (const char *, struct statfs *);
764int unmount (const char *, int);
765int fhopen (const struct fhandle *, int);
766int fhstat (const struct fhandle *, struct stat *);
767int fhstatfs (const struct fhandle *, struct statfs *);
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768
769/* C library stuff */
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770void endvfsent (void);
771struct ovfsconf *getvfsbyname (const char *);
772struct ovfsconf *getvfsbytype (int);
773struct ovfsconf *getvfsent (void);
984263bc 774#define getvfsbyname new_getvfsbyname
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775int new_getvfsbyname (const char *, struct vfsconf *);
776void setvfsent (int);
777int vfsisloadable (const char *);
778int vfsload (const char *);
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779__END_DECLS
780
781#endif /* _KERNEL */
782
783#endif /* !_SYS_MOUNT_H_ */
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