2 * Copyright (c) 1989, 1991, 1993
3 * The Regents of the University of California. All rights reserved.
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
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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.
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22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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 $
35 * $DragonFly: src/sys/sys/mount.h,v 1.47 2008/09/17 21:44:19 dillon Exp $
41 #include <sys/ucred.h>
44 #if !defined(_POSIX_C_SOURCE) && !defined(_XOPEN_SOURCE)
46 #endif /* !_POSIX_C_SOURCE */
49 #if defined(_KERNEL) || defined(_KERNEL_STRUCTURES)
51 #include <sys/queue.h>
56 #ifndef _SYS_NAMECACHE_H_
57 #include <sys/namecache.h>
59 #ifndef _SYS_STATVFS_H_
60 #include <sys/statvfs.h>
62 #ifndef _SYS_THREAD_H_
63 #include <sys/thread.h>
65 #include <sys/vfs_quota.h>
71 struct vop_mountctl_args;
74 typedef struct fsid { int32_t val[2]; } fsid_t; /* file system id type */
77 * File identifier. These are unique per filesystem on a single machine.
79 * fix_ext is also used by HAMMER.
84 u_short fid_len; /* length of data in bytes */
85 u_short fid_ext; /* extended data */
86 char fid_data[MAXFIDSZ]; /* data (variable length) */
90 * file system statistics
93 #define MFSNAMELEN 16 /* length of fs type name, including null */
94 #define MNAMELEN 80 /* length of buffer for returned name */
97 long f_spare2; /* placeholder */
98 long f_bsize; /* fundamental file system block size */
99 long f_iosize; /* optimal transfer block size */
100 long f_blocks; /* total data blocks in file system */
101 long f_bfree; /* free blocks in fs */
102 long f_bavail; /* free blocks avail to non-superuser */
103 long f_files; /* total file nodes in file system */
104 long f_ffree; /* free file nodes in fs */
105 fsid_t f_fsid; /* file system id */
106 uid_t f_owner; /* user that mounted the filesystem */
107 int f_type; /* type of filesystem */
108 int f_flags; /* copy of mount exported flags */
109 long f_syncwrites; /* count of sync writes since mount */
110 long f_asyncwrites; /* count of async writes since mount */
111 char f_fstypename[MFSNAMELEN]; /* fs type name */
112 char f_mntonname[MNAMELEN]; /* directory on which mounted */
113 long f_syncreads; /* count of sync reads since mount */
114 long f_asyncreads; /* count of async reads since mount */
115 short f_spares1; /* unused spare */
116 char f_mntfromname[MNAMELEN];/* mounted filesystem */
117 short f_spares2; /* unused spare */
118 long f_spare[2]; /* unused spare */
121 #if defined(_KERNEL) || defined(_KERNEL_STRUCTURES)
124 * bio_ops are associated with the mount structure and used in conjuction
125 * with the b_dep field in a buffer. Currently softupdates and HAMMER
126 * utilize this field.
128 * All bio_ops callbacks must be MPSAFE and could be called without
134 TAILQ_ENTRY(bio_ops) entry;
135 void (*io_start) (struct buf *);
136 void (*io_complete) (struct buf *);
137 void (*io_deallocate) (struct buf *);
138 int (*io_fsync) (struct vnode *);
139 int (*io_sync) (struct mount *);
140 void (*io_movedeps) (struct buf *, struct buf *);
141 int (*io_countdeps) (struct buf *, int);
142 int (*io_checkread) (struct buf *);
143 int (*io_checkwrite) (struct buf *);
147 * Structure per mounted file system. Each mounted file system has an
148 * array of operations and an instance record. The file systems are
149 * put on a doubly linked list.
151 * NOTE: mnt_nvnodelist and mnt_reservedvnlist. At the moment vnodes
152 * are linked into mnt_nvnodelist. At some point in the near future the
153 * vnode list will be split into a 'dirty' and 'clean' list. mnt_nvnodelist
154 * will become the dirty list and mnt_reservedvnlist will become the 'clean'
155 * list. Filesystem kld's syncing code should remain compatible since
156 * they only need to scan the dirty vnode list (nvnodelist -> dirtyvnodelist).
158 * NOTE: All VFSs must at least populate mnt_vn_ops or those VOP ops that
159 * only take namecache pointers will not be able to find their operations
160 * vector via namecache->nc_mount.
162 * MPSAFE NOTES: mnt_lock interlocks mounting and unmounting operations.
164 * mnt_token interlocks operations which adjust the mount
165 * structure and will also be held through VFS operations
166 * for VFSes not flagged MPSAFE.
168 TAILQ_HEAD(vnodelst, vnode);
169 TAILQ_HEAD(journallst, journal);
172 TAILQ_ENTRY(mount) mnt_list; /* mount list */
173 struct vfsops *mnt_op; /* operations on fs */
174 struct vfsconf *mnt_vfc; /* configuration info */
175 long mnt_namecache_gen; /* ++ to clear negative hits */
176 struct vnode *mnt_syncer; /* syncer vnode */
177 struct vnodelst mnt_nvnodelist; /* list of vnodes this mount */
178 struct lock mnt_lock; /* mount structure lock */
179 int mnt_flag; /* flags shared with user */
180 int mnt_kern_flag; /* kernel only flags */
181 int mnt_maxsymlinklen; /* max size of short symlink */
182 struct statfs mnt_stat; /* cache of filesystem stats */
183 struct statvfs mnt_vstat; /* extended stats */
184 qaddr_t mnt_data; /* private data */
185 time_t mnt_time; /* last time written*/
186 u_int mnt_iosize_max; /* max IO request size */
187 struct vnodelst mnt_reservedvnlist; /* (future) dirty vnode list */
188 int mnt_nvnodelistsize; /* # of vnodes on this mount */
191 * ops vectors have a fixed stacking order. All primary calls run
192 * through mnt_vn_ops. This field is typically assigned to
193 * mnt_vn_norm_ops. If journaling has been enabled this field is
194 * usually assigned to mnt_vn_journal_ops.
196 struct vop_ops *mnt_vn_use_ops; /* current ops set */
198 struct vop_ops *mnt_vn_coherency_ops; /* cache coherency ops */
199 struct vop_ops *mnt_vn_journal_ops; /* journaling ops */
200 struct vop_ops *mnt_vn_norm_ops; /* for use by the VFS */
201 struct vop_ops *mnt_vn_spec_ops; /* for use by the VFS */
202 struct vop_ops *mnt_vn_fifo_ops; /* for use by the VFS */
203 struct nchandle mnt_ncmountpt; /* mount point */
204 struct nchandle mnt_ncmounton; /* mounted on */
205 int mnt_refs; /* nchandle references */
206 struct lwkt_token mnt_token; /* token lock if not MPSAFE */
207 struct journallst mnt_jlist; /* list of active journals */
208 u_int8_t *mnt_jbitmap; /* streamid bitmap */
209 int16_t mnt_streamid; /* last streamid */
211 struct bio_ops *mnt_bioops; /* BIO ops (hammer, softupd) */
214 #endif /* _KERNEL || _KERNEL_STRUCTURES */
217 * User specifiable flags.
219 #define MNT_RDONLY 0x00000001 /* read only filesystem */
220 #define MNT_SYNCHRONOUS 0x00000002 /* file system written synchronously */
221 #define MNT_NOEXEC 0x00000004 /* can't exec from filesystem */
222 #define MNT_NOSUID 0x00000008 /* don't honor setuid bits on fs */
223 #define MNT_NODEV 0x00000010 /* don't interpret special files */
224 #define MNT_UNION 0x00000020 /* union with underlying filesystem */
225 #define MNT_ASYNC 0x00000040 /* file system written asynchronously */
226 #define MNT_SUIDDIR 0x00100000 /* special handling of SUID on dirs */
227 #define MNT_SOFTDEP 0x00200000 /* soft updates being done */
228 #define MNT_NOSYMFOLLOW 0x00400000 /* do not follow symlinks */
229 #define MNT_TRIM 0x01000000 /* Enable online FS trimming */
230 #define MNT_NOATIME 0x10000000 /* disable update of file access time */
231 #define MNT_NOCLUSTERR 0x40000000 /* disable cluster read */
232 #define MNT_NOCLUSTERW 0x80000000 /* disable cluster write */
235 * NFS export related mount flags.
237 #define MNT_EXRDONLY 0x00000080 /* exported read only */
238 #define MNT_EXPORTED 0x00000100 /* file system is exported */
239 #define MNT_DEFEXPORTED 0x00000200 /* exported to the world */
240 #define MNT_EXPORTANON 0x00000400 /* use anon uid mapping for everyone */
241 #define MNT_EXKERB 0x00000800 /* exported with Kerberos uid mapping */
242 #define MNT_EXPUBLIC 0x20000000 /* public export (WebNFS) */
245 * Flags set by internal operations,
246 * but visible to the user.
247 * XXX some of these are not quite right.. (I've never seen the root flag set)
249 #define MNT_LOCAL 0x00001000 /* filesystem is stored locally */
250 #define MNT_QUOTA 0x00002000 /* quotas are enabled on filesystem */
251 #define MNT_ROOTFS 0x00004000 /* identifies the root filesystem */
252 #define MNT_USER 0x00008000 /* mounted by a user */
253 #define MNT_IGNORE 0x00800000 /* do not show entry in df */
256 * Mask of flags that are visible to statfs()
257 * XXX I think that this could now become (~(MNT_CMDFLAGS))
258 * but the 'mount' program may need changing to handle this.
260 #define MNT_VISFLAGMASK (MNT_RDONLY | MNT_SYNCHRONOUS | MNT_NOEXEC | \
261 MNT_NOSUID | MNT_NODEV | MNT_UNION | \
262 MNT_ASYNC | MNT_EXRDONLY | MNT_EXPORTED | \
263 MNT_DEFEXPORTED | MNT_EXPORTANON| MNT_EXKERB | \
264 MNT_LOCAL | MNT_USER | MNT_QUOTA | \
265 MNT_ROOTFS | MNT_NOATIME | MNT_NOCLUSTERR| \
266 MNT_NOCLUSTERW | MNT_SUIDDIR | MNT_SOFTDEP | \
267 MNT_IGNORE | MNT_NOSYMFOLLOW | MNT_EXPUBLIC | MNT_TRIM)
269 * External filesystem command modifier flags.
270 * Unmount can use the MNT_FORCE flag.
271 * XXX These are not STATES and really should be somewhere else.
273 #define MNT_UPDATE 0x00010000 /* not a real mount, just an update */
274 #define MNT_DELEXPORT 0x00020000 /* delete export host lists */
275 #define MNT_RELOAD 0x00040000 /* reload filesystem data */
276 #define MNT_FORCE 0x00080000 /* force unmount or readonly change */
277 #define MNT_CMDFLAGS (MNT_UPDATE|MNT_DELEXPORT|MNT_RELOAD|MNT_FORCE)
279 * Internal filesystem control flags stored in mnt_kern_flag.
281 * MNTK_UNMOUNT locks the mount entry so that name lookup cannot proceed
282 * past the mount point. This keeps the subtree stable during mounts
285 * MNTK_UNMOUNTF permits filesystems to detect a forced unmount while
286 * dounmount() is still waiting to lock the mountpoint. This allows
287 * the filesystem to cancel operations that might otherwise deadlock
288 * with the unmount attempt (used by NFS).
290 * MNTK_NOSTKMNT prevents mounting another filesystem inside the flagged one.
292 #define MNTK_UNMOUNTF 0x00000001 /* forced unmount in progress */
293 #define MNTK_MPSAFE 0x00010000 /* call vops without mnt_token lock */
294 #define MNTK_RD_MPSAFE 0x00020000 /* vop_read is MPSAFE */
295 #define MNTK_WR_MPSAFE 0x00040000 /* vop_write is MPSAFE */
296 #define MNTK_GA_MPSAFE 0x00080000 /* vop_getattr is MPSAFE */
297 #define MNTK_IN_MPSAFE 0x00100000 /* vop_inactive is MPSAFE */
298 #define MNTK_SG_MPSAFE 0x00200000 /* vop_strategy is MPSAFE */
299 #define MNTK_NCALIASED 0x00800000 /* namecached aliased */
300 #define MNTK_UNMOUNT 0x01000000 /* unmount in progress */
301 #define MNTK_MWAIT 0x02000000 /* waiting for unmount to finish */
302 #define MNTK_WANTRDWR 0x04000000 /* upgrade to read/write requested */
303 #define MNTK_FSMID 0x08000000 /* getattr supports FSMIDs */
304 #define MNTK_NOSTKMNT 0x10000000 /* no stacked mount point allowed */
305 #define MNTK_NOMSYNC 0x20000000 /* used by tmpfs */
307 #define MNTK_ALL_MPSAFE (MNTK_MPSAFE | MNTK_RD_MPSAFE | MNTK_WR_MPSAFE | \
308 MNTK_GA_MPSAFE | MNTK_IN_MPSAFE | MNTK_SG_MPSAFE)
311 * mountlist_*() defines
313 #define MNTSCAN_FORWARD 0x0001
314 #define MNTSCAN_REVERSE 0x0002
315 #define MNTSCAN_NOBUSY 0x0004
317 #define MNTINS_FIRST 0x0001
318 #define MNTINS_LAST 0x0002
321 * Sysctl CTL_VFS definitions.
323 * Second level identifier specifies which filesystem. Second level
324 * identifier VFS_VFSCONF returns information about all filesystems.
325 * Second level identifier VFS_GENERIC is non-terminal.
327 #define VFS_VFSCONF 0 /* get configured filesystems */
328 #define VFS_GENERIC 0 /* generic filesystem information */
330 * Third level identifiers for VFS_GENERIC are given below; third
331 * level identifiers for specific filesystems are given in their
332 * mount specific header files.
334 #define VFS_MAXTYPENUM 1 /* int: highest defined filesystem type */
335 #define VFS_CONF 2 /* struct: vfsconf for filesystem given
341 #define VFS_MPLOCK_DECLARE int xlock_mpsafe
343 #define VFS_MPLOCK1(mp) VFS_MPLOCK_FLAG(mp, MNTK_MPSAFE)
345 #define VFS_MPLOCK2(mp) \
347 if (xlock_mpsafe) { \
348 get_mplock(); /* TEMPORARY */ \
349 lwkt_gettoken(&mp->mnt_token); \
354 #define VFS_MPLOCK_FLAG(mp, flag) \
356 if (mp->mnt_kern_flag & flag) { \
359 get_mplock(); /* TEMPORARY */ \
360 lwkt_gettoken(&mp->mnt_token); \
365 #define VFS_MPUNLOCK(mp) \
367 if (xlock_mpsafe == 0) { \
368 lwkt_reltoken(&mp->mnt_token); \
369 rel_mplock(); /* TEMPORARY */ \
374 * Flags for various system call interfaces.
376 * waitfor flags to vfs_sync() and getfsstat()
378 #define MNT_WAIT 0x0001 /* synchronously wait for I/O to complete */
379 #define MNT_NOWAIT 0x0002 /* start all I/O, but do not wait for it */
380 #define MNT_LAZY 0x0004 /* be lazy and do not necessarily push it all */
382 #define VOP_FSYNC_SYSCALL 0x0001 /* from system call */
385 * Generic file handle
388 fsid_t fh_fsid; /* File system id of mount point */
389 struct fid fh_fid; /* File sys specific id */
391 typedef struct fhandle fhandle_t;
394 * Export arguments for local filesystem mount calls.
397 int ex_flags; /* export related flags */
398 uid_t ex_root; /* mapping for root uid */
399 struct ucred ex_anon; /* mapping for anonymous user */
400 struct sockaddr *ex_addr; /* net address to which exported */
401 int ex_addrlen; /* and the net address length */
402 struct sockaddr *ex_mask; /* mask of valid bits in saddr */
403 int ex_masklen; /* and the smask length */
404 char *ex_indexfile; /* index file for WebNFS URLs */
408 * Structure holding information for a publicly exported filesystem
409 * (WebNFS). Currently the specs allow just for one such filesystem.
412 int np_valid; /* Do we hold valid information */
413 fhandle_t np_handle; /* Filehandle for pub fs (internal) */
414 struct mount *np_mount; /* Mountpoint of exported fs */
415 char *np_index; /* Index file */
419 * Filesystem configuration information. One of these exists for each
420 * type of filesystem supported by the kernel. These are searched at
421 * mount time to identify the requested filesystem.
423 #ifndef _SYS_QUEUE_H_
424 #include <sys/queue.h>
427 struct vfsops *vfc_vfsops; /* filesystem operations vector */
428 char vfc_name[MFSNAMELEN]; /* filesystem type name */
429 int vfc_typenum; /* historic filesystem type number */
430 int vfc_refcount; /* number mounted of this type */
431 int vfc_flags; /* permanent flags */
432 STAILQ_ENTRY(vfsconf) vfc_next; /* next in list */
444 * NB: these flags refer to IMPLEMENTATION properties, not properties of
445 * any actual mounts; i.e., it does not make sense to change the flags.
447 #define VFCF_STATIC 0x00010000 /* statically compiled into kernel */
448 #define VFCF_NETWORK 0x00020000 /* may get data over the network */
449 #define VFCF_READONLY 0x00040000 /* writes are not implemented */
450 #define VFCF_SYNTHETIC 0x00080000 /* data does not represent real files */
451 #define VFCF_LOOPBACK 0x00100000 /* aliases some other mounted FS */
452 #define VFCF_UNICODE 0x00200000 /* stores file names as Unicode*/
456 #ifdef MALLOC_DECLARE
457 MALLOC_DECLARE(M_MOUNT);
459 extern int nfs_mount_type; /* vfc_typenum for nfs, or -1 */
461 struct vfsconf *vfsconf_find_by_name(const char *);
462 struct vfsconf *vfsconf_find_by_typenum(int);
463 int vfsconf_get_maxtypenum(void);
464 int vfsconf_each(int (*)(struct vfsconf *, void *), void *);
468 #if defined(_KERNEL) || defined(_KERNEL_STRUCTURES)
470 TAILQ_HEAD(mntlist, mount); /* struct mntlist */
473 * Operations supported on mounted file system.
481 typedef int vfs_mount_t(struct mount *mp, char *path, caddr_t data,
483 typedef int vfs_start_t(struct mount *mp, int flags);
484 typedef int vfs_unmount_t(struct mount *mp, int mntflags);
485 typedef int vfs_root_t(struct mount *mp, struct vnode **vpp);
486 typedef int vfs_quotactl_t(struct mount *mp, int cmds, uid_t uid, caddr_t arg,
488 typedef int vfs_statfs_t(struct mount *mp, struct statfs *sbp,
490 typedef int vfs_statvfs_t(struct mount *mp, struct statvfs *sbp,
492 typedef int vfs_sync_t(struct mount *mp, int waitfor);
493 typedef int vfs_vget_t(struct mount *mp, struct vnode *dvp,
494 ino_t ino, struct vnode **vpp);
495 typedef int vfs_fhtovp_t(struct mount *mp, struct vnode *rootvp,
496 struct fid *fhp, struct vnode **vpp);
497 typedef int vfs_checkexp_t(struct mount *mp, struct sockaddr *nam,
498 int *extflagsp, struct ucred **credanonp);
499 typedef int vfs_vptofh_t(struct vnode *vp, struct fid *fhp);
500 typedef int vfs_init_t(struct vfsconf *);
501 typedef int vfs_uninit_t(struct vfsconf *);
502 typedef int vfs_extattrctl_t(struct mount *mp, int cmd, struct vnode *vp,
503 int attrnamespace, const char *attrname,
505 typedef int vfs_acinit_t(struct mount *mp);
506 typedef int vfs_acdone_t(struct mount *mp);
507 typedef int vfs_account_t(struct mount *mp,
508 uid_t uid, gid_t gid, int64_t delta);
510 int vfs_mount(struct mount *mp, char *path, caddr_t data, struct ucred *cred);
511 int vfs_start(struct mount *mp, int flags);
512 int vfs_unmount(struct mount *mp, int mntflags);
513 int vfs_root(struct mount *mp, struct vnode **vpp);
514 int vfs_quotactl(struct mount *mp, int cmds, uid_t uid, caddr_t arg,
516 int vfs_statfs(struct mount *mp, struct statfs *sbp, struct ucred *cred);
517 int vfs_statvfs(struct mount *mp, struct statvfs *sbp, struct ucred *cred);
518 int vfs_sync(struct mount *mp, int waitfor);
519 int vfs_vget(struct mount *mp, struct vnode *dvp,
520 ino_t ino, struct vnode **vpp);
521 int vfs_fhtovp(struct mount *mp, struct vnode *rootvp,
522 struct fid *fhp, struct vnode **vpp);
523 int vfs_checkexp(struct mount *mp, struct sockaddr *nam,
524 int *extflagsp, struct ucred **credanonp);
525 int vfs_vptofh(struct vnode *vp, struct fid *fhp);
526 int vfs_init(struct vfsconf *vfc);
527 int vfs_uninit(struct vfsconf *vfc, struct vfsconf *vfsp);
528 int vfs_extattrctl(struct mount *mp, int cmd, struct vnode *vp,
529 int attrnamespace, const char *attrname,
534 vfs_mount_t *vfs_mount;
535 vfs_start_t *vfs_start;
536 vfs_unmount_t *vfs_unmount;
537 vfs_root_t *vfs_root;
538 vfs_quotactl_t *vfs_quotactl;
539 vfs_statfs_t *vfs_statfs;
540 vfs_sync_t *vfs_sync;
541 vfs_vget_t *vfs_vget;
542 vfs_fhtovp_t *vfs_fhtovp;
543 vfs_checkexp_t *vfs_checkexp;
544 vfs_vptofh_t *vfs_vptofh;
545 vfs_init_t *vfs_init;
546 vfs_uninit_t *vfs_uninit;
547 vfs_extattrctl_t *vfs_extattrctl;
548 vfs_statvfs_t *vfs_statvfs;
549 vfs_acinit_t *vfs_acinit;
550 vfs_acdone_t *vfs_acdone;
551 vfs_account_t *vfs_account;
554 #define VFS_MOUNT(MP, PATH, DATA, CRED) \
555 vfs_mount(MP, PATH, DATA, CRED)
556 #define VFS_START(MP, FLAGS) \
558 #define VFS_UNMOUNT(MP, FORCE) \
559 vfs_unmount(MP, FORCE)
560 #define VFS_ROOT(MP, VPP) \
562 #define VFS_QUOTACTL(MP, C, U, A, CRED) \
563 vfs_quotactl(MP, C, U, A, CRED)
564 #define VFS_STATFS(MP, SBP, CRED) \
565 vfs_statfs(MP, SBP, CRED)
566 #define VFS_STATVFS(MP, SBP, CRED) \
567 vfs_statvfs(MP, SBP, CRED)
568 #define VFS_SYNC(MP, WAIT) \
570 #define VFS_VGET(MP, DVP, INO, VPP) \
571 vfs_vget(MP, DVP, INO, VPP)
572 #define VFS_FHTOVP(MP, ROOTVP, FIDP, VPP) \
573 vfs_fhtovp(MP, ROOTVP, FIDP, VPP)
574 #define VFS_VPTOFH(VP, FIDP) \
576 #define VFS_CHECKEXP(MP, NAM, EXFLG, CRED) \
577 vfs_checkexp(MP, NAM, EXFLG, CRED)
578 #define VFS_EXTATTRCTL(MP, C, FVP, NS, N, CRED) \
579 vfs_extattrctl(MP, C, FVP, NS, N, CRED)
585 #include <sys/module.h>
587 #define VFS_SET(vfsops, fsname, flags) \
588 static struct vfsconf fsname ## _vfsconf = { \
596 static moduledata_t fsname ## _mod = { \
599 & fsname ## _vfsconf \
601 DECLARE_MODULE(fsname, fsname ## _mod, SI_SUB_VFS, SI_ORDER_MIDDLE)
605 #if defined(_KERNEL) || defined(_KERNEL_STRUCTURES)
607 #include <net/radix.h>
609 #define AF_MAX 36 /* XXX */
612 * Network address lookup element
615 struct radix_node netc_rnodes[2];
617 struct ucred netc_anon;
621 * Network export information
624 struct netcred ne_defexported; /* Default export */
625 struct radix_node_head *ne_rtable[AF_MAX+1]; /* Individual exports */
632 extern char *mountrootfsname;
635 * exported vnode operations
637 int dounmount (struct mount *, int);
638 int vfs_setpublicfs /* set publicly exported fs */
639 (struct mount *, struct netexport *, const struct export_args *);
640 int vfs_lock (struct mount *); /* lock a vfs */
641 void vfs_msync (struct mount *, int);
642 void vfs_unlock (struct mount *); /* unlock a vfs */
643 int vfs_busy (struct mount *, int);
644 void vfs_bufstats(void);
645 int vfs_export /* process mount export info */
646 (struct mount *, struct netexport *, const struct export_args *);
647 struct netcred *vfs_export_lookup /* lookup host in fs export list */
648 (struct mount *, struct netexport *, struct sockaddr *);
649 int vfs_allocate_syncvnode (struct mount *);
650 void vfs_getnewfsid (struct mount *);
651 int vfs_setfsid(struct mount *mp, fsid_t *template);
652 cdev_t vfs_getrootfsid (struct mount *);
653 struct mount *vfs_getvfs (fsid_t *); /* return vfs given fsid */
654 int vfs_modevent (module_t, int, void *);
655 int vfs_mountedon (struct vnode *); /* is a vfs mounted on vp */
656 int vfs_rootmountalloc (char *, char *, struct mount **);
657 void vfs_unbusy (struct mount *);
658 void vfs_unmountall (void);
659 int vfs_register (struct vfsconf *);
660 int vfs_unregister (struct vfsconf *);
661 extern struct nfs_public nfs_pub;
664 * Declarations for these vfs default operations are located in
665 * kern/vfs_default.c, they should be used instead of making "dummy"
666 * functions or casting entries in the VFS op table to "enopnotsupp()".
668 vfs_start_t vfs_stdstart;
669 vfs_mount_t vfs_stdmount;
670 vfs_unmount_t vfs_stdunmount;
671 vfs_root_t vfs_stdroot;
672 vfs_quotactl_t vfs_stdquotactl;
673 vfs_statfs_t vfs_stdstatfs;
674 vfs_statvfs_t vfs_stdstatvfs;
675 vfs_sync_t vfs_stdsync;
676 vfs_sync_t vfs_stdnosync;
677 vfs_vget_t vfs_stdvget;
678 vfs_fhtovp_t vfs_stdfhtovp;
679 vfs_checkexp_t vfs_stdcheckexp;
680 vfs_vptofh_t vfs_stdvptofh;
681 vfs_init_t vfs_stdinit;
682 vfs_uninit_t vfs_stduninit;
683 vfs_extattrctl_t vfs_stdextattrctl;
684 vfs_acinit_t vfs_stdac_init;
685 vfs_acdone_t vfs_stdac_done;
686 vfs_account_t vfs_stdaccount;
687 vfs_account_t vfs_noaccount;
689 struct vop_access_args;
690 int vop_helper_access(struct vop_access_args *ap, uid_t ino_uid, gid_t ino_gid,
691 mode_t ino_mode, u_int32_t ino_flags);
692 int vop_helper_setattr_flags(u_int32_t *ino_flags, u_int32_t vaflags,
693 uid_t uid, struct ucred *cred);
694 uid_t vop_helper_create_uid(struct mount *mp, mode_t dmode, uid_t duid,
695 struct ucred *cred, mode_t *modep);
696 int vop_helper_chmod(struct vnode *vp, mode_t new_mode, struct ucred *cred,
697 uid_t cur_uid, gid_t cur_gid, mode_t *cur_modep);
698 int vop_helper_chown(struct vnode *vp, uid_t new_uid, gid_t new_gid,
700 uid_t *cur_uidp, gid_t *cur_gidp, mode_t *cur_modep);
702 void add_bio_ops(struct bio_ops *ops);
703 void rem_bio_ops(struct bio_ops *ops);
705 int journal_mountctl(struct vop_mountctl_args *ap);
706 void journal_remove_all_journals(struct mount *mp, int flags);
708 void mountlist_insert(struct mount *, int);
709 int mountlist_interlock(int (*callback)(struct mount *), struct mount *);
710 struct mount *mountlist_boot_getfirst(void);
711 void mountlist_remove(struct mount *mp);
712 int mountlist_scan(int (*callback)(struct mount *, void *), void *, int);
713 struct mount *mount_get_by_nc(struct namecache *ncp);
716 #include <sys/cdefs.h>
719 int fstatfs (int, struct statfs *);
720 int getfh (const char *, fhandle_t *);
721 int getfsstat (struct statfs *, long, int);
722 int getmntinfo (struct statfs **, int);
723 int getmntvinfo (struct statfs **, struct statvfs **, int);
724 int mount (const char *, const char *, int, void *);
725 int statfs (const char *, struct statfs *);
726 int unmount (const char *, int);
727 int fhopen (const struct fhandle *, int);
728 int fhstat (const struct fhandle *, struct stat *);
729 int fhstatfs (const struct fhandle *, struct statfs *);
731 /* C library stuff */
732 void endvfsent (void);
733 struct ovfsconf *getvfsbyname (const char *);
734 struct ovfsconf *getvfsbytype (int);
735 struct ovfsconf *getvfsent (void);
736 #define getvfsbyname new_getvfsbyname
737 int new_getvfsbyname (const char *, struct vfsconf *);
738 void setvfsent (int);
739 int vfsisloadable (const char *);
740 int vfsload (const char *);
745 #endif /* !_SYS_MOUNT_H_ */