kernel - lwkt_token revamp
[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.
126 */
127struct buf;
128
129struct bio_ops {
130 TAILQ_ENTRY(bio_ops) entry;
131 void (*io_start) (struct buf *);
132 void (*io_complete) (struct buf *);
133 void (*io_deallocate) (struct buf *);
134 int (*io_fsync) (struct vnode *);
135 int (*io_sync) (struct mount *);
136 void (*io_movedeps) (struct buf *, struct buf *);
137 int (*io_countdeps) (struct buf *, int);
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138 int (*io_checkread) (struct buf *);
139 int (*io_checkwrite) (struct buf *);
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140};
141
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142/*
143 * Structure per mounted file system. Each mounted file system has an
144 * array of operations and an instance record. The file systems are
145 * put on a doubly linked list.
146 *
147 * NOTE: mnt_nvnodelist and mnt_reservedvnlist. At the moment vnodes
148 * are linked into mnt_nvnodelist. At some point in the near future the
149 * vnode list will be split into a 'dirty' and 'clean' list. mnt_nvnodelist
150 * will become the dirty list and mnt_reservedvnlist will become the 'clean'
151 * list. Filesystem kld's syncing code should remain compatible since
152 * they only need to scan the dirty vnode list (nvnodelist -> dirtyvnodelist).
41a01a4d 153 *
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154 * NOTE: All VFSs must at least populate mnt_vn_ops or those VOP ops that
155 * only take namecache pointers will not be able to find their operations
156 * vector via namecache->nc_mount.
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157 *
158 * MPSAFE NOTES: mnt_lock interlocks mounting and unmounting operations.
159 *
160 * mnt_token interlocks operations which adjust the mount
161 * structure and will also be held through VFS operations
162 * for VFSes not flagged MPSAFE.
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163 */
164TAILQ_HEAD(vnodelst, vnode);
2281065e 165TAILQ_HEAD(journallst, journal);
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166
167struct mount {
168 TAILQ_ENTRY(mount) mnt_list; /* mount list */
169 struct vfsops *mnt_op; /* operations on fs */
170 struct vfsconf *mnt_vfc; /* configuration info */
4b5bbb78 171 long mnt_namecache_gen; /* ++ to clear negative hits */
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172 struct vnode *mnt_syncer; /* syncer vnode */
173 struct vnodelst mnt_nvnodelist; /* list of vnodes this mount */
174 struct lock mnt_lock; /* mount structure lock */
175 int mnt_flag; /* flags shared with user */
176 int mnt_kern_flag; /* kernel only flags */
177 int mnt_maxsymlinklen; /* max size of short symlink */
178 struct statfs mnt_stat; /* cache of filesystem stats */
d9fad06e 179 struct statvfs mnt_vstat; /* extended stats */
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180 qaddr_t mnt_data; /* private data */
181 time_t mnt_time; /* last time written*/
182 u_int mnt_iosize_max; /* max IO request size */
183 struct vnodelst mnt_reservedvnlist; /* (future) dirty vnode list */
184 int mnt_nvnodelistsize; /* # of vnodes on this mount */
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185
186 /*
187 * ops vectors have a fixed stacking order. All primary calls run
188 * through mnt_vn_ops. This field is typically assigned to
189 * mnt_vn_norm_ops. If journaling has been enabled this field is
190 * usually assigned to mnt_vn_journal_ops.
191 */
192 struct vop_ops *mnt_vn_use_ops; /* current ops set */
193
194 struct vop_ops *mnt_vn_coherency_ops; /* cache coherency ops */
195 struct vop_ops *mnt_vn_journal_ops; /* journaling ops */
196 struct vop_ops *mnt_vn_norm_ops; /* for use by the VFS */
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197 struct vop_ops *mnt_vn_spec_ops; /* for use by the VFS */
198 struct vop_ops *mnt_vn_fifo_ops; /* for use by the VFS */
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199 struct nchandle mnt_ncmountpt; /* mount point */
200 struct nchandle mnt_ncmounton; /* mounted on */
201 int mnt_refs; /* nchandle references */
aac0aabd 202 struct lwkt_token mnt_token; /* token lock if not MPSAFE */
2281065e 203 struct journallst mnt_jlist; /* list of active journals */
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204 u_int8_t *mnt_jbitmap; /* streamid bitmap */
205 int16_t mnt_streamid; /* last streamid */
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206
207 struct bio_ops *mnt_bioops; /* BIO ops (hammer, softupd) */
984263bc 208};
2281065e 209
ec12abe0 210#endif /* _KERNEL || _KERNEL_STRUCTURES */
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211
212/*
213 * User specifiable flags.
214 */
215#define MNT_RDONLY 0x00000001 /* read only filesystem */
216#define MNT_SYNCHRONOUS 0x00000002 /* file system written synchronously */
217#define MNT_NOEXEC 0x00000004 /* can't exec from filesystem */
218#define MNT_NOSUID 0x00000008 /* don't honor setuid bits on fs */
219#define MNT_NODEV 0x00000010 /* don't interpret special files */
220#define MNT_UNION 0x00000020 /* union with underlying filesystem */
221#define MNT_ASYNC 0x00000040 /* file system written asynchronously */
222#define MNT_SUIDDIR 0x00100000 /* special handling of SUID on dirs */
223#define MNT_SOFTDEP 0x00200000 /* soft updates being done */
224#define MNT_NOSYMFOLLOW 0x00400000 /* do not follow symlinks */
225#define MNT_NOATIME 0x10000000 /* disable update of file access time */
226#define MNT_NOCLUSTERR 0x40000000 /* disable cluster read */
227#define MNT_NOCLUSTERW 0x80000000 /* disable cluster write */
228
229/*
230 * NFS export related mount flags.
231 */
232#define MNT_EXRDONLY 0x00000080 /* exported read only */
233#define MNT_EXPORTED 0x00000100 /* file system is exported */
234#define MNT_DEFEXPORTED 0x00000200 /* exported to the world */
235#define MNT_EXPORTANON 0x00000400 /* use anon uid mapping for everyone */
236#define MNT_EXKERB 0x00000800 /* exported with Kerberos uid mapping */
237#define MNT_EXPUBLIC 0x20000000 /* public export (WebNFS) */
238
239/*
240 * Flags set by internal operations,
241 * but visible to the user.
242 * XXX some of these are not quite right.. (I've never seen the root flag set)
243 */
244#define MNT_LOCAL 0x00001000 /* filesystem is stored locally */
245#define MNT_QUOTA 0x00002000 /* quotas are enabled on filesystem */
246#define MNT_ROOTFS 0x00004000 /* identifies the root filesystem */
247#define MNT_USER 0x00008000 /* mounted by a user */
248#define MNT_IGNORE 0x00800000 /* do not show entry in df */
249
250/*
251 * Mask of flags that are visible to statfs()
252 * XXX I think that this could now become (~(MNT_CMDFLAGS))
253 * but the 'mount' program may need changing to handle this.
254 */
255#define MNT_VISFLAGMASK (MNT_RDONLY | MNT_SYNCHRONOUS | MNT_NOEXEC | \
256 MNT_NOSUID | MNT_NODEV | MNT_UNION | \
257 MNT_ASYNC | MNT_EXRDONLY | MNT_EXPORTED | \
258 MNT_DEFEXPORTED | MNT_EXPORTANON| MNT_EXKERB | \
259 MNT_LOCAL | MNT_USER | MNT_QUOTA | \
260 MNT_ROOTFS | MNT_NOATIME | MNT_NOCLUSTERR| \
261 MNT_NOCLUSTERW | MNT_SUIDDIR | MNT_SOFTDEP | \
262 MNT_IGNORE | MNT_NOSYMFOLLOW | MNT_EXPUBLIC )
263/*
264 * External filesystem command modifier flags.
265 * Unmount can use the MNT_FORCE flag.
266 * XXX These are not STATES and really should be somewhere else.
267 */
268#define MNT_UPDATE 0x00010000 /* not a real mount, just an update */
269#define MNT_DELEXPORT 0x00020000 /* delete export host lists */
270#define MNT_RELOAD 0x00040000 /* reload filesystem data */
271#define MNT_FORCE 0x00080000 /* force unmount or readonly change */
272#define MNT_CMDFLAGS (MNT_UPDATE|MNT_DELEXPORT|MNT_RELOAD|MNT_FORCE)
273/*
274 * Internal filesystem control flags stored in mnt_kern_flag.
275 *
276 * MNTK_UNMOUNT locks the mount entry so that name lookup cannot proceed
277 * past the mount point. This keeps the subtree stable during mounts
278 * and unmounts.
279 *
280 * MNTK_UNMOUNTF permits filesystems to detect a forced unmount while
281 * dounmount() is still waiting to lock the mountpoint. This allows
282 * the filesystem to cancel operations that might otherwise deadlock
283 * with the unmount attempt (used by NFS).
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284 *
285 * MNTK_NOSTKMNT prevents mounting another filesystem inside the flagged one.
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286 */
287#define MNTK_UNMOUNTF 0x00000001 /* forced unmount in progress */
aac0aabd 288#define MNTK_MPSAFE 0x00010000 /* call vops without mnt_token lock */
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289#define MNTK_RD_MPSAFE 0x00020000 /* vop_read is MPSAFE */
290#define MNTK_WR_MPSAFE 0x00040000 /* vop_write is MPSAFE */
291#define MNTK_GA_MPSAFE 0x00080000 /* vop_getattr is MPSAFE */
292#define MNTK_IN_MPSAFE 0x00100000 /* vop_inactive is MPSAFE */
7a2de9a4 293#define MNTK_SG_MPSAFE 0x00200000 /* vop_strategy is MPSAFE */
28623bf9 294#define MNTK_NCALIASED 0x00800000 /* namecached aliased */
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295#define MNTK_UNMOUNT 0x01000000 /* unmount in progress */
296#define MNTK_MWAIT 0x02000000 /* waiting for unmount to finish */
297#define MNTK_WANTRDWR 0x04000000 /* upgrade to read/write requested */
66a1ddf5 298#define MNTK_FSMID 0x08000000 /* getattr supports FSMIDs */
5dc91765 299#define MNTK_NOSTKMNT 0x10000000 /* no stacked mount point allowed */
2bc7505b 300#define MNTK_NOMSYNC 0x20000000 /* used by tmpfs */
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301
302/*
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303 * mountlist_*() defines
304 */
305#define MNTSCAN_FORWARD 0x0001
306#define MNTSCAN_REVERSE 0x0002
307#define MNTSCAN_NOBUSY 0x0004
308
309#define MNTINS_FIRST 0x0001
310#define MNTINS_LAST 0x0002
311
312/*
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313 * Sysctl CTL_VFS definitions.
314 *
315 * Second level identifier specifies which filesystem. Second level
316 * identifier VFS_VFSCONF returns information about all filesystems.
317 * Second level identifier VFS_GENERIC is non-terminal.
318 */
319#define VFS_VFSCONF 0 /* get configured filesystems */
320#define VFS_GENERIC 0 /* generic filesystem information */
321/*
322 * Third level identifiers for VFS_GENERIC are given below; third
323 * level identifiers for specific filesystems are given in their
324 * mount specific header files.
325 */
326#define VFS_MAXTYPENUM 1 /* int: highest defined filesystem type */
327#define VFS_CONF 2 /* struct: vfsconf for filesystem given
328 as next argument */
329
330/*
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331 * VFS MPLOCK helper.
332 */
3b998fa9 333#define VFS_MPLOCK_DECLARE int xlock_mpsafe
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334
335#define VFS_MPLOCK1(mp) VFS_MPLOCK_FLAG(mp, MNTK_MPSAFE)
336
337#define VFS_MPLOCK2(mp) \
338 do { \
339 if (xlock_mpsafe) { \
340 get_mplock(); /* TEMPORARY */ \
3b998fa9 341 lwkt_gettoken(&mp->mnt_token); \
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342 xlock_mpsafe = 0; \
343 } \
344 } while(0)
345
346#define VFS_MPLOCK_FLAG(mp, flag) \
347 do { \
348 if (mp->mnt_kern_flag & flag) { \
349 xlock_mpsafe = 1; \
350 } else { \
351 get_mplock(); /* TEMPORARY */ \
3b998fa9 352 lwkt_gettoken(&mp->mnt_token); \
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353 xlock_mpsafe = 0; \
354 } \
355 } while(0)
356
357#define VFS_MPUNLOCK(mp) \
358 do { \
359 if (xlock_mpsafe == 0) { \
3b998fa9 360 lwkt_reltoken(&mp->mnt_token); \
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361 rel_mplock(); /* TEMPORARY */ \
362 } \
363 } while(0)
364
365/*
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366 * Flags for various system call interfaces.
367 *
368 * waitfor flags to vfs_sync() and getfsstat()
369 */
370#define MNT_WAIT 1 /* synchronously wait for I/O to complete */
371#define MNT_NOWAIT 2 /* start all I/O, but do not wait for it */
6bae6177 372#define MNT_LAZY 4 /* be lazy and do not necessarily push it all */
984263bc 373
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374#define VOP_FSYNC_SYSCALL 0x0001 /* from system call */
375
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376/*
377 * Generic file handle
378 */
379struct fhandle {
380 fsid_t fh_fsid; /* File system id of mount point */
381 struct fid fh_fid; /* File sys specific id */
382};
383typedef struct fhandle fhandle_t;
384
385/*
386 * Export arguments for local filesystem mount calls.
387 */
388struct export_args {
389 int ex_flags; /* export related flags */
390 uid_t ex_root; /* mapping for root uid */
391 struct ucred ex_anon; /* mapping for anonymous user */
392 struct sockaddr *ex_addr; /* net address to which exported */
393 int ex_addrlen; /* and the net address length */
394 struct sockaddr *ex_mask; /* mask of valid bits in saddr */
395 int ex_masklen; /* and the smask length */
396 char *ex_indexfile; /* index file for WebNFS URLs */
397};
398
399/*
400 * Structure holding information for a publicly exported filesystem
401 * (WebNFS). Currently the specs allow just for one such filesystem.
402 */
403struct nfs_public {
404 int np_valid; /* Do we hold valid information */
405 fhandle_t np_handle; /* Filehandle for pub fs (internal) */
406 struct mount *np_mount; /* Mountpoint of exported fs */
407 char *np_index; /* Index file */
408};
409
410/*
411 * Filesystem configuration information. One of these exists for each
412 * type of filesystem supported by the kernel. These are searched at
413 * mount time to identify the requested filesystem.
414 */
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415#ifndef _SYS_QUEUE_H_
416#include <sys/queue.h>
417#endif
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418struct vfsconf {
419 struct vfsops *vfc_vfsops; /* filesystem operations vector */
420 char vfc_name[MFSNAMELEN]; /* filesystem type name */
421 int vfc_typenum; /* historic filesystem type number */
422 int vfc_refcount; /* number mounted of this type */
423 int vfc_flags; /* permanent flags */
2613053d 424 STAILQ_ENTRY(vfsconf) vfc_next; /* next in list */
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425};
426
427struct ovfsconf {
428 void *vfc_vfsops;
429 char vfc_name[32];
430 int vfc_index;
431 int vfc_refcount;
432 int vfc_flags;
433};
434
435/*
436 * NB: these flags refer to IMPLEMENTATION properties, not properties of
437 * any actual mounts; i.e., it does not make sense to change the flags.
438 */
439#define VFCF_STATIC 0x00010000 /* statically compiled into kernel */
440#define VFCF_NETWORK 0x00020000 /* may get data over the network */
441#define VFCF_READONLY 0x00040000 /* writes are not implemented */
442#define VFCF_SYNTHETIC 0x00080000 /* data does not represent real files */
443#define VFCF_LOOPBACK 0x00100000 /* aliases some other mounted FS */
444#define VFCF_UNICODE 0x00200000 /* stores file names as Unicode*/
445
446#ifdef _KERNEL
447
448#ifdef MALLOC_DECLARE
449MALLOC_DECLARE(M_MOUNT);
450#endif
984263bc 451extern int nfs_mount_type; /* vfc_typenum for nfs, or -1 */
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452
453struct vfsconf *vfsconf_find_by_name(const char *);
454struct vfsconf *vfsconf_find_by_typenum(int);
455int vfsconf_get_maxtypenum(void);
456int vfsconf_each(int (*)(struct vfsconf *, void *), void *);
984263bc 457
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458#endif
459
460#if defined(_KERNEL) || defined(_KERNEL_STRUCTURES)
461
462TAILQ_HEAD(mntlist, mount); /* struct mntlist */
463
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464/*
465 * Operations supported on mounted file system.
466 */
467#ifdef __STDC__
21739618 468struct nlookupdata;
fad57d0e 469struct nlookupdata;
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470struct mbuf;
471#endif
472
43c45e8f 473typedef int vfs_mount_t(struct mount *mp, char *path, caddr_t data,
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474 struct ucred *cred);
475typedef int vfs_start_t(struct mount *mp, int flags);
476typedef int vfs_unmount_t(struct mount *mp, int mntflags);
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477typedef int vfs_root_t(struct mount *mp, struct vnode **vpp);
478typedef int vfs_quotactl_t(struct mount *mp, int cmds, uid_t uid, caddr_t arg,
acde96db 479 struct ucred *cred);
43c45e8f 480typedef int vfs_statfs_t(struct mount *mp, struct statfs *sbp,
acde96db 481 struct ucred *cred);
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482typedef int vfs_statvfs_t(struct mount *mp, struct statvfs *sbp,
483 struct ucred *cred);
87de5057 484typedef int vfs_sync_t(struct mount *mp, int waitfor);
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485typedef int vfs_vget_t(struct mount *mp, struct vnode *dvp,
486 ino_t ino, struct vnode **vpp);
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487typedef int vfs_fhtovp_t(struct mount *mp, struct vnode *rootvp,
488 struct fid *fhp, struct vnode **vpp);
43c45e8f 489typedef int vfs_checkexp_t(struct mount *mp, struct sockaddr *nam,
b153f746 490 int *extflagsp, struct ucred **credanonp);
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491typedef int vfs_vptofh_t(struct vnode *vp, struct fid *fhp);
492typedef int vfs_init_t(struct vfsconf *);
493typedef int vfs_uninit_t(struct vfsconf *);
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494typedef int vfs_extattrctl_t(struct mount *mp, int cmd, struct vnode *vp,
495 int attrnamespace, const char *attrname,
496 struct ucred *cred);
43c45e8f 497
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498int vfs_mount(struct mount *mp, char *path, caddr_t data, struct ucred *cred);
499int vfs_start(struct mount *mp, int flags);
500int vfs_unmount(struct mount *mp, int mntflags);
501int vfs_root(struct mount *mp, struct vnode **vpp);
502int vfs_quotactl(struct mount *mp, int cmds, uid_t uid, caddr_t arg,
503 struct ucred *cred);
504int vfs_statfs(struct mount *mp, struct statfs *sbp, struct ucred *cred);
505int vfs_statvfs(struct mount *mp, struct statvfs *sbp, struct ucred *cred);
506int vfs_sync(struct mount *mp, int waitfor);
507int vfs_vget(struct mount *mp, struct vnode *dvp,
508 ino_t ino, struct vnode **vpp);
509int vfs_fhtovp(struct mount *mp, struct vnode *rootvp,
510 struct fid *fhp, struct vnode **vpp);
511int vfs_checkexp(struct mount *mp, struct sockaddr *nam,
512 int *extflagsp, struct ucred **credanonp);
513int vfs_vptofh(struct vnode *vp, struct fid *fhp);
514int vfs_init(struct vfsconf *vfc);
515int vfs_uninit(struct vfsconf *vfc, struct vfsconf *vfsp);
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516int vfs_extattrctl(struct mount *mp, int cmd, struct vnode *vp,
517 int attrnamespace, const char *attrname,
518 struct ucred *cred);
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519
520
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521struct vfsops {
522 vfs_mount_t *vfs_mount;
523 vfs_start_t *vfs_start;
524 vfs_unmount_t *vfs_unmount;
525 vfs_root_t *vfs_root;
526 vfs_quotactl_t *vfs_quotactl;
527 vfs_statfs_t *vfs_statfs;
528 vfs_sync_t *vfs_sync;
529 vfs_vget_t *vfs_vget;
530 vfs_fhtovp_t *vfs_fhtovp;
531 vfs_checkexp_t *vfs_checkexp;
532 vfs_vptofh_t *vfs_vptofh;
533 vfs_init_t *vfs_init;
534 vfs_uninit_t *vfs_uninit;
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535 vfs_extattrctl_t *vfs_extattrctl;
536 vfs_statvfs_t *vfs_statvfs;
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537};
538
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539#define VFS_MOUNT(MP, PATH, DATA, CRED) \
540 vfs_mount(MP, PATH, DATA, CRED)
541#define VFS_START(MP, FLAGS) \
542 vfs_start(MP, FLAGS)
543#define VFS_UNMOUNT(MP, FORCE) \
544 vfs_unmount(MP, FORCE)
545#define VFS_ROOT(MP, VPP) \
546 vfs_root(MP, VPP)
547#define VFS_QUOTACTL(MP, C, U, A, CRED) \
548 vfs_quotactl(MP, C, U, A, CRED)
549#define VFS_STATFS(MP, SBP, CRED) \
550 vfs_statfs(MP, SBP, CRED)
551#define VFS_STATVFS(MP, SBP, CRED) \
552 vfs_statvfs(MP, SBP, CRED)
553#define VFS_SYNC(MP, WAIT) \
554 vfs_sync(MP, WAIT)
555#define VFS_VGET(MP, DVP, INO, VPP) \
556 vfs_vget(MP, DVP, INO, VPP)
67863d04 557#define VFS_FHTOVP(MP, ROOTVP, FIDP, VPP) \
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558 vfs_fhtovp(MP, ROOTVP, FIDP, VPP)
559#define VFS_VPTOFH(VP, FIDP) \
560 vfs_vptofh(VP, FIDP)
561#define VFS_CHECKEXP(MP, NAM, EXFLG, CRED) \
562 vfs_checkexp(MP, NAM, EXFLG, CRED)
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563#define VFS_EXTATTRCTL(MP, C, FVP, NS, N, CRED) \
564 vfs_extattrctl(MP, C, FVP, NS, N, CRED)
984263bc 565
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566#endif
567
568#ifdef _KERNEL
569
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570#include <sys/module.h>
571
572#define VFS_SET(vfsops, fsname, flags) \
573 static struct vfsconf fsname ## _vfsconf = { \
574 &vfsops, \
575 #fsname, \
576 -1, \
577 0, \
58661e79 578 flags, \
37c1c8fc 579 { NULL }, \
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580 }; \
581 static moduledata_t fsname ## _mod = { \
582 #fsname, \
583 vfs_modevent, \
584 & fsname ## _vfsconf \
585 }; \
586 DECLARE_MODULE(fsname, fsname ## _mod, SI_SUB_VFS, SI_ORDER_MIDDLE)
587
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588#endif
589
590#if defined(_KERNEL) || defined(_KERNEL_STRUCTURES)
591
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592#include <net/radix.h>
593
fbb5a20f 594#define AF_MAX 36 /* XXX */
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595
596/*
597 * Network address lookup element
598 */
599struct netcred {
600 struct radix_node netc_rnodes[2];
601 int netc_exflags;
602 struct ucred netc_anon;
603};
604
605/*
606 * Network export information
607 */
608struct netexport {
609 struct netcred ne_defexported; /* Default export */
610 struct radix_node_head *ne_rtable[AF_MAX+1]; /* Individual exports */
611};
612
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613#endif
614
615#ifdef _KERNEL
616
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617extern char *mountrootfsname;
618
619/*
620 * exported vnode operations
621 */
acde96db 622int dounmount (struct mount *, int);
984263bc 623int vfs_setpublicfs /* set publicly exported fs */
1aa89f17 624 (struct mount *, struct netexport *, const struct export_args *);
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625int vfs_lock (struct mount *); /* lock a vfs */
626void vfs_msync (struct mount *, int);
627void vfs_unlock (struct mount *); /* unlock a vfs */
f9642f56 628int vfs_busy (struct mount *, int);
6bdbb368 629void vfs_bufstats(void);
984263bc 630int vfs_export /* process mount export info */
1aa89f17 631 (struct mount *, struct netexport *, const struct export_args *);
984263bc 632struct netcred *vfs_export_lookup /* lookup host in fs export list */
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633 (struct mount *, struct netexport *, struct sockaddr *);
634int vfs_allocate_syncvnode (struct mount *);
635void vfs_getnewfsid (struct mount *);
67863d04 636int vfs_setfsid(struct mount *mp, fsid_t *template);
b13267a5 637cdev_t vfs_getrootfsid (struct mount *);
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638struct mount *vfs_getvfs (fsid_t *); /* return vfs given fsid */
639int vfs_modevent (module_t, int, void *);
640int vfs_mountedon (struct vnode *); /* is a vfs mounted on vp */
641int vfs_rootmountalloc (char *, char *, struct mount **);
f9642f56 642void vfs_unbusy (struct mount *);
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643void vfs_unmountall (void);
644int vfs_register (struct vfsconf *);
645int vfs_unregister (struct vfsconf *);
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646extern struct nfs_public nfs_pub;
647
648/*
649 * Declarations for these vfs default operations are located in
650 * kern/vfs_default.c, they should be used instead of making "dummy"
651 * functions or casting entries in the VFS op table to "enopnotsupp()".
652 */
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653vfs_start_t vfs_stdstart;
654vfs_mount_t vfs_stdmount;
655vfs_unmount_t vfs_stdunmount;
656vfs_root_t vfs_stdroot;
657vfs_quotactl_t vfs_stdquotactl;
658vfs_statfs_t vfs_stdstatfs;
d9fad06e 659vfs_statvfs_t vfs_stdstatvfs;
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660vfs_sync_t vfs_stdsync;
661vfs_sync_t vfs_stdnosync;
662vfs_vget_t vfs_stdvget;
663vfs_fhtovp_t vfs_stdfhtovp;
664vfs_checkexp_t vfs_stdcheckexp;
665vfs_vptofh_t vfs_stdvptofh;
666vfs_init_t vfs_stdinit;
667vfs_uninit_t vfs_stduninit;
acde96db 668vfs_extattrctl_t vfs_stdextattrctl;
43c45e8f 669
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670struct vop_access_args;
671int vop_helper_access(struct vop_access_args *ap, uid_t ino_uid, gid_t ino_gid,
fb356552 672 mode_t ino_mode, u_int32_t ino_flags);
1399fa3b 673int vop_helper_setattr_flags(u_int32_t *ino_flags, u_int32_t vaflags,
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674 uid_t uid, struct ucred *cred);
675uid_t vop_helper_create_uid(struct mount *mp, mode_t dmode, uid_t duid,
676 struct ucred *cred, mode_t *modep);
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677int vop_helper_chmod(struct vnode *vp, mode_t new_mode, struct ucred *cred,
678 uid_t cur_uid, gid_t cur_gid, mode_t *cur_modep);
679int vop_helper_chown(struct vnode *vp, uid_t new_uid, gid_t new_gid,
680 struct ucred *cred,
681 uid_t *cur_uidp, gid_t *cur_gidp, mode_t *cur_modep);
1399fa3b 682
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683void add_bio_ops(struct bio_ops *ops);
684void rem_bio_ops(struct bio_ops *ops);
9340415c 685
2281065e 686int journal_mountctl(struct vop_mountctl_args *ap);
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687void journal_remove_all_journals(struct mount *mp, int flags);
688
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689void mountlist_insert(struct mount *, int);
690int mountlist_interlock(int (*callback)(struct mount *), struct mount *);
691struct mount *mountlist_boot_getfirst(void);
692void mountlist_remove(struct mount *mp);
693int mountlist_scan(int (*callback)(struct mount *, void *), void *, int);
5b4cfb7e 694struct mount *mount_get_by_nc(struct namecache *ncp);
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695#else /* !_KERNEL */
696
697#include <sys/cdefs.h>
698
699__BEGIN_DECLS
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700int fstatfs (int, struct statfs *);
701int getfh (const char *, fhandle_t *);
702int getfsstat (struct statfs *, long, int);
703int getmntinfo (struct statfs **, int);
0e735c8f 704int getmntvinfo (struct statfs **, struct statvfs **, int);
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705int mount (const char *, const char *, int, void *);
706int statfs (const char *, struct statfs *);
707int unmount (const char *, int);
708int fhopen (const struct fhandle *, int);
709int fhstat (const struct fhandle *, struct stat *);
710int fhstatfs (const struct fhandle *, struct statfs *);
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711
712/* C library stuff */
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713void endvfsent (void);
714struct ovfsconf *getvfsbyname (const char *);
715struct ovfsconf *getvfsbytype (int);
716struct ovfsconf *getvfsent (void);
984263bc 717#define getvfsbyname new_getvfsbyname
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718int new_getvfsbyname (const char *, struct vfsconf *);
719void setvfsent (int);
720int vfsisloadable (const char *);
721int vfsload (const char *);
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722__END_DECLS
723
724#endif /* _KERNEL */
725
726#endif /* !_SYS_MOUNT_H_ */
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