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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12 * documentation and/or other materials provided with the distribution.
13 * 3. Neither the name of the University nor the names of its contributors
14 * may be used to endorse or promote products derived from this software
15 * without specific prior written permission.
17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29 * @(#)mount.h 8.21 (Berkeley) 5/20/95
30 * $FreeBSD: src/sys/sys/mount.h,v 1.89.2.7 2003/04/04 20:35:57 tegge Exp $
36 #include <sys/queue.h>
38 #include <sys/ucred.h>
41 #if !defined(_POSIX_C_SOURCE) && !defined(_XOPEN_SOURCE)
43 #endif /* !_POSIX_C_SOURCE */
46 #if defined(_KERNEL) || defined(_KERNEL_STRUCTURES)
50 #ifndef _SYS_NAMECACHE_H_
51 #include <sys/namecache.h>
53 #ifndef _SYS_STATVFS_H_
54 #include <sys/statvfs.h>
56 #ifndef _SYS_THREAD_H_
57 #include <sys/thread.h>
59 #include <sys/vfs_quota.h>
65 struct vop_mountctl_args;
67 struct vmntvnodescan_info;
69 typedef struct fsid { int32_t val[2]; } fsid_t; /* file system id type */
72 * File identifier. These are unique per filesystem on a single machine.
74 * fix_ext is also used by HAMMER.
79 u_short fid_len; /* length of data in bytes */
80 u_short fid_ext; /* extended data */
81 char fid_data[MAXFIDSZ]; /* data (variable length) */
85 * file system statistics
88 #define MFSNAMELEN 16 /* length of fs type name, including null */
89 #define MNAMELEN 80 /* length of buffer for returned name */
92 long f_spare2; /* placeholder */
93 long f_bsize; /* fundamental file system block size */
94 long f_iosize; /* optimal transfer block size */
95 long f_blocks; /* total data blocks in file system */
96 long f_bfree; /* free blocks in fs */
97 long f_bavail; /* free blocks avail to non-superuser */
98 long f_files; /* total file nodes in file system */
99 long f_ffree; /* free file nodes in fs */
100 fsid_t f_fsid; /* file system id */
101 uid_t f_owner; /* user that mounted the filesystem */
102 int f_type; /* type of filesystem */
103 int f_flags; /* copy of mount exported flags */
104 long f_syncwrites; /* count of sync writes since mount */
105 long f_asyncwrites; /* count of async writes since mount */
106 char f_fstypename[MFSNAMELEN]; /* fs type name */
107 char f_mntonname[MNAMELEN]; /* directory on which mounted */
108 long f_syncreads; /* count of sync reads since mount */
109 long f_asyncreads; /* count of async reads since mount */
110 short f_spares1; /* unused spare */
111 char f_mntfromname[MNAMELEN];/* mounted filesystem */
112 short f_spares2; /* unused spare */
113 long f_spare[2]; /* unused spare */
116 #if defined(_KERNEL) || defined(_KERNEL_STRUCTURES)
119 * bio_ops are associated with the mount structure and used in conjuction
120 * with the b_dep field in a buffer. Currently softupdates and HAMMER
121 * utilize this field.
123 * All bio_ops callbacks must be MPSAFE and could be called without
129 TAILQ_ENTRY(bio_ops) entry;
130 void (*io_start) (struct buf *);
131 void (*io_complete) (struct buf *);
132 void (*io_deallocate) (struct buf *);
133 int (*io_fsync) (struct vnode *);
134 int (*io_sync) (struct mount *);
135 void (*io_movedeps) (struct buf *, struct buf *);
136 int (*io_countdeps) (struct buf *, int);
137 int (*io_checkread) (struct buf *);
138 int (*io_checkwrite) (struct buf *);
144 * vfs quota accounting
146 * uids and gids often come in contiguous blocks; use a small linear
147 * array as the basic in-memory accounting allocation unit
149 #define ACCT_CHUNK_BITS 5
150 #define ACCT_CHUNK_NIDS (1<<ACCT_CHUNK_BITS)
151 #define ACCT_CHUNK_MASK (ACCT_CHUNK_NIDS - 1)
159 RB_ENTRY(ac_unode) rb_entry;
161 struct ac_counters uid_chunk[ACCT_CHUNK_NIDS];
165 RB_ENTRY(ac_gnode) rb_entry;
167 struct ac_counters gid_chunk[ACCT_CHUNK_NIDS];
170 #if defined(_KERNEL) || defined(_KERNEL_STRUCTURES)
173 RB_HEAD(ac_utree,ac_unode) ac_uroot;
174 RB_HEAD(ac_gtree,ac_gnode) ac_groot;
175 uint64_t ac_bytes; /* total bytes used */
177 struct spinlock ac_spin; /* protective spinlock */
182 * Structure per mounted file system. Each mounted file system has an
183 * array of operations and an instance record. The file systems are
184 * put on a doubly linked list.
186 * NOTE: mnt_nvnodelist and mnt_reservedvnlist. At the moment vnodes
187 * are linked into mnt_nvnodelist. At some point in the near future the
188 * vnode list will be split into a 'dirty' and 'clean' list. mnt_nvnodelist
189 * will become the dirty list and mnt_reservedvnlist will become the 'clean'
190 * list. Filesystem kld's syncing code should remain compatible since
191 * they only need to scan the dirty vnode list (nvnodelist -> dirtyvnodelist).
193 * NOTE: All VFSs must at least populate mnt_vn_ops or those VOP ops that
194 * only take namecache pointers will not be able to find their operations
195 * vector via namecache->nc_mount.
197 * MPSAFE NOTES: mnt_lock interlocks mounting and unmounting operations.
199 * mnt_token interlocks operations which adjust the mount
200 * structure and will also be held through VFS operations
201 * for VFSes not flagged MPSAFE.
203 * The VFS should pre-set VFCF_MPSAFE in the VFS_SET() to
204 * avoid use of the mplock during mounting. This will also
205 * cause MNTK_ALL_MPSAFE to be set in mnt_kern_flags. If the
206 * VFS does not set VFCF_MPSAFE then it can set individual
207 * MNTK_*_MPSAFE flags in mnt_kern_flags.
209 TAILQ_HEAD(vnodelst, vnode);
210 TAILQ_HEAD(journallst, journal);
213 TAILQ_ENTRY(mount) mnt_list; /* mount list */
214 struct vfsops *mnt_op; /* operations on fs */
215 struct vfsconf *mnt_vfc; /* configuration info */
216 u_int mnt_namecache_gen; /* ++ to clear negative hits */
217 u_int mnt_pbuf_count; /* pbuf usage limit */
218 struct vnode *mnt_syncer; /* syncer vnode */
219 struct syncer_ctx *mnt_syncer_ctx; /* syncer process context */
220 struct vnodelst mnt_nvnodelist; /* list of vnodes this mount */
221 TAILQ_HEAD(,vmntvnodescan_info) mnt_vnodescan_list;
222 struct lock mnt_lock; /* mount structure lock */
223 int mnt_flag; /* flags shared with user */
224 int mnt_kern_flag; /* kernel only flags */
225 int mnt_maxsymlinklen; /* max size of short symlink */
226 struct statfs mnt_stat; /* cache of filesystem stats */
227 struct statvfs mnt_vstat; /* extended stats */
228 qaddr_t mnt_data; /* private data */
229 time_t mnt_time; /* last time written*/
230 u_int mnt_iosize_max; /* max IO request size */
231 struct vnodelst mnt_reservedvnlist; /* (future) dirty vnode list */
232 int mnt_nvnodelistsize; /* # of vnodes on this mount */
235 * ops vectors have a fixed stacking order. All primary calls run
236 * through mnt_vn_ops. This field is typically assigned to
237 * mnt_vn_norm_ops. If journaling has been enabled this field is
238 * usually assigned to mnt_vn_journal_ops.
240 struct vop_ops *mnt_vn_use_ops; /* current ops set */
242 struct vop_ops *mnt_vn_coherency_ops; /* cache coherency ops */
243 struct vop_ops *mnt_vn_journal_ops; /* journaling ops */
244 struct vop_ops *mnt_vn_norm_ops; /* for use by the VFS */
245 struct vop_ops *mnt_vn_spec_ops; /* for use by the VFS */
246 struct vop_ops *mnt_vn_fifo_ops; /* for use by the VFS */
247 struct nchandle mnt_ncmountpt; /* mount point */
248 struct nchandle mnt_ncmounton; /* mounted on */
249 char mnt_pad[24]; /* (try to cache-align refs) */
250 int mnt_refs; /* nchandle references */
251 int mnt_hold; /* prevent kfree */
252 struct lwkt_token mnt_token; /* token lock if not MPSAFE */
253 struct journallst mnt_jlist; /* list of active journals */
254 u_int8_t *mnt_jbitmap; /* streamid bitmap */
255 int16_t mnt_streamid; /* last streamid */
257 struct bio_ops *mnt_bioops; /* BIO ops (hammer, softupd) */
259 struct vfs_acct mnt_acct; /* vfs space accounting */
262 #endif /* _KERNEL || _KERNEL_STRUCTURES */
265 * User specifiable flags.
267 #define MNT_RDONLY 0x00000001 /* read only filesystem */
268 #define MNT_SYNCHRONOUS 0x00000002 /* file system written synchronously */
269 #define MNT_NOEXEC 0x00000004 /* can't exec from filesystem */
270 #define MNT_NOSUID 0x00000008 /* don't honor setuid bits on fs */
271 #define MNT_NODEV 0x00000010 /* don't interpret special files */
272 #define MNT_AUTOMOUNTED 0x00000020 /* mounted by automountd(8) */
273 #define MNT_ASYNC 0x00000040 /* file system written asynchronously */
274 #define MNT_SUIDDIR 0x00100000 /* special handling of SUID on dirs */
275 #define MNT_SOFTDEP 0x00200000 /* soft updates being done */
276 #define MNT_NOSYMFOLLOW 0x00400000 /* do not follow symlinks */
277 #define MNT_TRIM 0x01000000 /* Enable online FS trimming */
278 #define MNT_NOATIME 0x10000000 /* disable update of file access time */
279 #define MNT_NOCLUSTERR 0x40000000 /* disable cluster read */
280 #define MNT_NOCLUSTERW 0x80000000 /* disable cluster write */
283 * NFS export related mount flags.
285 #define MNT_EXRDONLY 0x00000080 /* exported read only */
286 #define MNT_EXPORTED 0x00000100 /* file system is exported */
287 #define MNT_DEFEXPORTED 0x00000200 /* exported to the world */
288 #define MNT_EXPORTANON 0x00000400 /* use anon uid mapping for everyone */
289 #define MNT_EXKERB 0x00000800 /* exported with Kerberos uid mapping */
290 #define MNT_EXPUBLIC 0x20000000 /* public export (WebNFS) */
293 * Flags set by internal operations,
294 * but visible to the user.
295 * XXX some of these are not quite right.. (I've never seen the root flag set)
297 #define MNT_LOCAL 0x00001000 /* filesystem is stored locally */
298 #define MNT_QUOTA 0x00002000 /* quotas are enabled on filesystem */
299 #define MNT_ROOTFS 0x00004000 /* identifies the root filesystem */
300 #define MNT_USER 0x00008000 /* mounted by a user */
301 #define MNT_IGNORE 0x00800000 /* do not show entry in df */
304 * Mask of flags that are visible to statfs()
305 * XXX I think that this could now become (~(MNT_CMDFLAGS))
306 * but the 'mount' program may need changing to handle this.
308 #define MNT_VISFLAGMASK (MNT_RDONLY | MNT_SYNCHRONOUS | MNT_NOEXEC | \
309 MNT_NOSUID | MNT_NODEV | \
310 MNT_ASYNC | MNT_EXRDONLY | MNT_EXPORTED | \
311 MNT_DEFEXPORTED | MNT_EXPORTANON| MNT_EXKERB | \
312 MNT_LOCAL | MNT_USER | MNT_QUOTA | \
313 MNT_ROOTFS | MNT_NOATIME | MNT_NOCLUSTERR| \
314 MNT_NOCLUSTERW | MNT_SUIDDIR | MNT_SOFTDEP | \
315 MNT_IGNORE | MNT_NOSYMFOLLOW | MNT_EXPUBLIC| \
316 MNT_TRIM | MNT_AUTOMOUNTED)
318 * External filesystem command modifier flags.
319 * Unmount can use the MNT_FORCE flag.
320 * XXX These are not STATES and really should be somewhere else.
322 #define MNT_UPDATE 0x00010000 /* not a real mount, just an update */
323 #define MNT_DELEXPORT 0x00020000 /* delete export host lists */
324 #define MNT_RELOAD 0x00040000 /* reload filesystem data */
325 #define MNT_FORCE 0x00080000 /* force unmount or readonly change */
326 #define MNT_CMDFLAGS (MNT_UPDATE|MNT_DELEXPORT|MNT_RELOAD|MNT_FORCE)
328 * Internal filesystem control flags stored in mnt_kern_flag.
330 * MNTK_UNMOUNT locks the mount entry so that name lookup cannot proceed
331 * past the mount point. This keeps the subtree stable during mounts
334 * MNTK_UNMOUNTF permits filesystems to detect a forced unmount while
335 * dounmount() is still waiting to lock the mountpoint. This allows
336 * the filesystem to cancel operations that might otherwise deadlock
337 * with the unmount attempt (used by NFS).
339 * MNTK_NOSTKMNT prevents mounting another filesystem inside the flagged one.
341 #define MNTK_UNMOUNTF 0x00000001 /* forced unmount in progress */
342 #define MNTK_QUICKHALT 0x00008000 /* quick unmount on halt */
343 #define MNTK_MPSAFE 0x00010000 /* call vops without mnt_token lock */
344 #define MNTK_RD_MPSAFE 0x00020000 /* vop_read is MPSAFE */
345 #define MNTK_WR_MPSAFE 0x00040000 /* vop_write is MPSAFE */
346 #define MNTK_GA_MPSAFE 0x00080000 /* vop_getattr is MPSAFE */
347 #define MNTK_IN_MPSAFE 0x00100000 /* vop_inactive is MPSAFE */
348 #define MNTK_SG_MPSAFE 0x00200000 /* vop_strategy is MPSAFE */
349 #define MNTK_NCALIASED 0x00800000 /* namecached aliased */
350 #define MNTK_UNMOUNT 0x01000000 /* unmount in progress */
351 #define MNTK_MWAIT 0x02000000 /* waiting for unmount to finish */
352 #define MNTK_WANTRDWR 0x04000000 /* upgrade to read/write requested */
353 #define MNTK_FSMID 0x08000000 /* getattr supports FSMIDs */
354 #define MNTK_NOSTKMNT 0x10000000 /* no stacked mount point allowed */
355 #define MNTK_NOMSYNC 0x20000000 /* used by tmpfs */
356 #define MNTK_THR_SYNC 0x40000000 /* fs sync thread requested */
357 #define MNTK_ST_MPSAFE 0x80000000 /* (mfs) vfs_start is MPSAFE */
359 #define MNTK_ALL_MPSAFE (MNTK_MPSAFE | MNTK_RD_MPSAFE | MNTK_WR_MPSAFE | \
360 MNTK_GA_MPSAFE | MNTK_IN_MPSAFE | MNTK_SG_MPSAFE | \
364 * mountlist_*() defines
366 #define MNTSCAN_FORWARD 0x0001
367 #define MNTSCAN_REVERSE 0x0002
368 #define MNTSCAN_NOBUSY 0x0004
370 #define MNTINS_FIRST 0x0001
371 #define MNTINS_LAST 0x0002
374 * Sysctl CTL_VFS definitions.
376 * Second level identifier specifies which filesystem. Second level
377 * identifier VFS_VFSCONF returns information about all filesystems.
378 * Second level identifier VFS_GENERIC is non-terminal.
380 #define VFS_VFSCONF 0 /* get configured filesystems */
381 #define VFS_GENERIC 0 /* generic filesystem information */
383 * Third level identifiers for VFS_GENERIC are given below; third
384 * level identifiers for specific filesystems are given in their
385 * mount specific header files.
387 #define VFS_MAXTYPENUM 1 /* int: highest defined filesystem type */
388 #define VFS_CONF 2 /* struct: vfsconf for filesystem given
394 #define VFS_MPLOCK_DECLARE int xlock_mpsafe
396 #define VFS_MPLOCK(mp) VFS_MPLOCK_FLAG(mp, MNTK_MPSAFE)
398 #define VFS_MPLOCK_FLAG(mp, flag) \
400 if (mp->mnt_kern_flag & flag) { \
403 get_mplock(); /* TEMPORARY */ \
404 lwkt_gettoken(&mp->mnt_token); \
409 #define VFS_MPUNLOCK(mp) \
411 if (xlock_mpsafe == 0) { \
412 lwkt_reltoken(&mp->mnt_token); \
413 rel_mplock(); /* TEMPORARY */ \
418 * Flags for various system call interfaces.
420 * waitfor flags to vfs_sync() and getfsstat()
422 #define MNT_WAIT 0x0001 /* synchronously wait for I/O to complete */
423 #define MNT_NOWAIT 0x0002 /* start all I/O, but do not wait for it */
424 #define MNT_LAZY 0x0004 /* be lazy and do not necessarily push it all */
426 #define VOP_FSYNC_SYSCALL 0x0001 /* from system call */
429 * Generic file handle
432 fsid_t fh_fsid; /* File system id of mount point */
433 struct fid fh_fid; /* File sys specific id */
435 typedef struct fhandle fhandle_t;
438 * Export arguments for local filesystem mount calls.
441 int ex_flags; /* export related flags */
442 uid_t ex_root; /* mapping for root uid */
443 struct ucred ex_anon; /* mapping for anonymous user */
444 struct sockaddr *ex_addr; /* net address to which exported */
445 int ex_addrlen; /* and the net address length */
446 struct sockaddr *ex_mask; /* mask of valid bits in saddr */
447 int ex_masklen; /* and the smask length */
448 char *ex_indexfile; /* index file for WebNFS URLs */
452 * Structure holding information for a publicly exported filesystem
453 * (WebNFS). Currently the specs allow just for one such filesystem.
456 int np_valid; /* Do we hold valid information */
457 fhandle_t np_handle; /* Filehandle for pub fs (internal) */
458 struct mount *np_mount; /* Mountpoint of exported fs */
459 char *np_index; /* Index file */
463 * Filesystem configuration information. One of these exists for each
464 * type of filesystem supported by the kernel. These are searched at
465 * mount time to identify the requested filesystem.
468 struct vfsops *vfc_vfsops; /* filesystem operations vector */
469 char vfc_name[MFSNAMELEN]; /* filesystem type name */
470 int vfc_typenum; /* historic filesystem type number */
471 int vfc_refcount; /* number mounted of this type */
472 int vfc_flags; /* permanent flags */
473 STAILQ_ENTRY(vfsconf) vfc_next; /* next in list */
485 * NB: these flags refer to IMPLEMENTATION properties, not properties of
486 * any actual mounts; i.e., it does not make sense to change the flags.
488 #define VFCF_STATIC 0x00010000 /* statically compiled into kernel */
489 #define VFCF_NETWORK 0x00020000 /* may get data over the network */
490 #define VFCF_READONLY 0x00040000 /* writes are not implemented */
491 #define VFCF_SYNTHETIC 0x00080000 /* data does not represent real files */
492 #define VFCF_LOOPBACK 0x00100000 /* aliases some other mounted FS */
493 #define VFCF_UNICODE 0x00200000 /* stores file names as Unicode*/
494 #define VFCF_MPSAFE 0x00400000 /* VFS is fully MPSAFE */
497 #define VQ_NOTRESP 0x0001 /* server down */
498 #define VQ_NEEDAUTH 0x0002 /* server bad auth */
499 #define VQ_LOWDISK 0x0004 /* we're low on space */
500 #define VQ_MOUNT 0x0008 /* new filesystem arrived */
501 #define VQ_UNMOUNT 0x0010 /* filesystem has left */
502 #define VQ_DEAD 0x0020 /* filesystem is dead, needs force unmount */
503 #define VQ_ASSIST 0x0040 /* filesystem needs assistance from external
505 #define VQ_NOTRESPLOCK 0x0080 /* server lockd down */
506 #define VQ_FLAG0100 0x0100 /* placeholder */
507 #define VQ_FLAG0200 0x0200 /* placeholder */
508 #define VQ_FLAG0400 0x0400 /* placeholder */
509 #define VQ_FLAG0800 0x0800 /* placeholder */
510 #define VQ_FLAG1000 0x1000 /* placeholder */
511 #define VQ_FLAG2000 0x2000 /* placeholder */
512 #define VQ_FLAG4000 0x4000 /* placeholder */
513 #define VQ_FLAG8000 0x8000 /* placeholder */
517 #ifdef MALLOC_DECLARE
518 MALLOC_DECLARE(M_MOUNT);
520 extern int nfs_mount_type; /* vfc_typenum for nfs, or -1 */
522 struct vfsconf *vfsconf_find_by_name(const char *);
523 struct vfsconf *vfsconf_find_by_typenum(int);
524 int vfsconf_get_maxtypenum(void);
525 int vfsconf_each(int (*)(struct vfsconf *, void *), void *);
529 #if defined(_KERNEL) || defined(_KERNEL_STRUCTURES)
531 TAILQ_HEAD(mntlist, mount); /* struct mntlist */
534 * Operations supported on mounted file system.
540 typedef int vfs_mount_t(struct mount *mp, char *path, caddr_t data,
542 typedef int vfs_start_t(struct mount *mp, int flags);
543 typedef int vfs_unmount_t(struct mount *mp, int mntflags);
544 typedef int vfs_root_t(struct mount *mp, struct vnode **vpp);
545 typedef int vfs_quotactl_t(struct mount *mp, int cmds, uid_t uid, caddr_t arg,
547 typedef int vfs_statfs_t(struct mount *mp, struct statfs *sbp,
549 typedef int vfs_statvfs_t(struct mount *mp, struct statvfs *sbp,
551 typedef int vfs_sync_t(struct mount *mp, int waitfor);
552 typedef int vfs_vget_t(struct mount *mp, struct vnode *dvp,
553 ino_t ino, struct vnode **vpp);
554 typedef int vfs_fhtovp_t(struct mount *mp, struct vnode *rootvp,
555 struct fid *fhp, struct vnode **vpp);
556 typedef int vfs_checkexp_t(struct mount *mp, struct sockaddr *nam,
557 int *extflagsp, struct ucred **credanonp);
558 typedef int vfs_vptofh_t(struct vnode *vp, struct fid *fhp);
559 typedef int vfs_init_t(struct vfsconf *);
560 typedef int vfs_uninit_t(struct vfsconf *);
561 typedef int vfs_extattrctl_t(struct mount *mp, int cmd, struct vnode *vp,
562 int attrnamespace, const char *attrname,
564 typedef int vfs_acinit_t(struct mount *mp);
565 typedef void vfs_acdone_t(struct mount *mp);
566 typedef void vfs_account_t(struct mount *mp,
567 uid_t uid, gid_t gid, int64_t delta);
568 typedef void vfs_ncpgen_set_t(struct mount *mp, struct namecache *ncp);
569 typedef int vfs_ncpgen_test_t(struct mount *mp, struct namecache *ncp);
571 int vfs_mount(struct mount *mp, char *path, caddr_t data, struct ucred *cred);
572 int vfs_start(struct mount *mp, int flags);
573 int vfs_unmount(struct mount *mp, int mntflags);
574 int vfs_root(struct mount *mp, struct vnode **vpp);
575 int vfs_quotactl(struct mount *mp, int cmds, uid_t uid, caddr_t arg,
577 int vfs_statfs(struct mount *mp, struct statfs *sbp, struct ucred *cred);
578 int vfs_statvfs(struct mount *mp, struct statvfs *sbp, struct ucred *cred);
579 int vfs_sync(struct mount *mp, int waitfor);
580 int vfs_vget(struct mount *mp, struct vnode *dvp,
581 ino_t ino, struct vnode **vpp);
582 int vfs_fhtovp(struct mount *mp, struct vnode *rootvp,
583 struct fid *fhp, struct vnode **vpp);
584 int vfs_checkexp(struct mount *mp, struct sockaddr *nam,
585 int *extflagsp, struct ucred **credanonp);
586 int vfs_vptofh(struct vnode *vp, struct fid *fhp);
587 int vfs_init(struct vfsconf *vfc);
588 int vfs_uninit(struct vfsconf *vfc, struct vfsconf *vfsp);
589 int vfs_extattrctl(struct mount *mp, int cmd, struct vnode *vp,
590 int attrnamespace, const char *attrname,
595 vfs_mount_t *vfs_mount;
596 vfs_start_t *vfs_start;
597 vfs_unmount_t *vfs_unmount;
598 vfs_root_t *vfs_root;
599 vfs_quotactl_t *vfs_quotactl;
600 vfs_statfs_t *vfs_statfs;
601 vfs_sync_t *vfs_sync;
602 vfs_vget_t *vfs_vget;
603 vfs_fhtovp_t *vfs_fhtovp;
604 vfs_checkexp_t *vfs_checkexp;
605 vfs_vptofh_t *vfs_vptofh;
606 vfs_init_t *vfs_init;
607 vfs_uninit_t *vfs_uninit;
608 vfs_extattrctl_t *vfs_extattrctl;
609 vfs_statvfs_t *vfs_statvfs;
610 vfs_acinit_t *vfs_acinit;
611 vfs_acdone_t *vfs_acdone;
612 vfs_account_t *vfs_account;
613 vfs_ncpgen_set_t *vfs_ncpgen_set;
614 vfs_ncpgen_test_t *vfs_ncpgen_test;
617 #define VFS_MOUNT(MP, PATH, DATA, CRED) \
618 vfs_mount(MP, PATH, DATA, CRED)
619 #define VFS_START(MP, FLAGS) \
621 #define VFS_UNMOUNT(MP, FORCE) \
622 vfs_unmount(MP, FORCE)
623 #define VFS_ROOT(MP, VPP) \
625 #define VFS_QUOTACTL(MP, C, U, A, CRED) \
626 vfs_quotactl(MP, C, U, A, CRED)
627 #define VFS_STATFS(MP, SBP, CRED) \
628 vfs_statfs(MP, SBP, CRED)
629 #define VFS_STATVFS(MP, SBP, CRED) \
630 vfs_statvfs(MP, SBP, CRED)
631 #define VFS_SYNC(MP, WAIT) \
633 #define VFS_VGET(MP, DVP, INO, VPP) \
634 vfs_vget(MP, DVP, INO, VPP)
635 #define VFS_FHTOVP(MP, ROOTVP, FIDP, VPP) \
636 vfs_fhtovp(MP, ROOTVP, FIDP, VPP)
637 #define VFS_VPTOFH(VP, FIDP) \
639 #define VFS_CHECKEXP(MP, NAM, EXFLG, CRED) \
640 vfs_checkexp(MP, NAM, EXFLG, CRED)
641 #define VFS_EXTATTRCTL(MP, C, FVP, NS, N, CRED) \
642 vfs_extattrctl(MP, C, FVP, NS, N, CRED)
643 #define VFS_ACCOUNT(MP, U, G, D) \
644 if ((MP->mnt_op->vfs_account != NULL) && (D != 0)) \
645 MP->mnt_op->vfs_account(MP, U, G, D);
646 #define VFS_ACINIT(MP, ERROR) \
647 if (vfs_quota_enabled && MP->mnt_op->vfs_acinit != NULL) \
648 ERROR = MP->mnt_op->vfs_acinit(MP);
649 #define VFS_ACDONE(MP) \
650 if (vfs_quota_enabled && MP->mnt_op->vfs_acdone != NULL) \
651 MP->mnt_op->vfs_acdone(MP);
652 #define VFS_NCPGEN_SET(MP, NCP) \
653 MP->mnt_op->vfs_ncpgen_set(MP, NCP)
654 #define VFS_NCPGEN_TEST(MP, NCP) \
655 MP->mnt_op->vfs_ncpgen_test(MP, NCP)
661 #include <sys/module.h>
663 #define VFS_SET(vfsops, fsname, flags) \
664 static struct vfsconf fsname ## _vfsconf = { \
672 static moduledata_t fsname ## _mod = { \
675 & fsname ## _vfsconf \
677 DECLARE_MODULE(fsname, fsname ## _mod, SI_SUB_VFS, SI_ORDER_MIDDLE)
681 #if defined(_KERNEL) || defined(_KERNEL_STRUCTURES)
683 #include <net/radix.h>
685 #define AF_MAX 36 /* XXX */
688 * Network address lookup element
691 struct radix_node netc_rnodes[2];
693 struct ucred netc_anon;
697 * Network export information
700 struct netcred ne_defexported; /* Default export */
701 struct radix_node_head *ne_inethead; /* IPv4 radix */
702 struct radix_node_head *ne_inet6head; /* IPv6 radix */
703 struct radix_node_head *ne_maskhead; /* Shared mask radix */
705 #define NE_LOCK(nep) lwkt_getpooltoken(nep)
706 #define NE_UNLOCK(nep) lwkt_relpooltoken(nep)
707 #define NE_ASSERT_LOCKED(nep) \
708 ASSERT_LWKT_TOKEN_HELD(lwkt_token_pool_lookup(nep))
714 * exported vnode operations
716 void mount_hold(struct mount *);
717 void mount_drop(struct mount *);
718 int dounmount (struct mount *, int, int);
719 int vfs_setpublicfs /* set publicly exported fs */
720 (struct mount *, struct netexport *, const struct export_args *);
721 int vfs_lock (struct mount *); /* lock a vfs */
722 void vfs_msync (struct mount *, int);
723 void vfs_unlock (struct mount *); /* unlock a vfs */
724 int vfs_busy (struct mount *, int);
725 int vfs_export /* process mount export info */
726 (struct mount *, struct netexport *, const struct export_args *);
727 struct netcred *vfs_export_lookup /* lookup host in fs export list */
728 (struct mount *, struct netexport *, struct sockaddr *);
729 int vfs_allocate_syncvnode (struct mount *);
730 void vfs_getnewfsid (struct mount *);
731 int vfs_setfsid(struct mount *mp, fsid_t *template);
732 cdev_t vfs_getrootfsid (struct mount *);
733 struct mount *vfs_getvfs (fsid_t *); /* return vfs given fsid */
734 int vfs_modevent (module_t, int, void *);
735 int vfs_mountedon (struct vnode *); /* is a vfs mounted on vp */
736 int vfs_rootmountalloc (char *, char *, struct mount **);
737 void vfs_unbusy (struct mount *);
738 void vfs_unmountall (int halting);
739 int vfs_register (struct vfsconf *);
740 int vfs_unregister (struct vfsconf *);
741 extern struct nfs_public nfs_pub;
744 * Declarations for these vfs default operations are located in
745 * kern/vfs_default.c, they should be used instead of making "dummy"
746 * functions or casting entries in the VFS op table to "enopnotsupp()".
748 vfs_start_t vfs_stdstart;
749 vfs_root_t vfs_stdroot;
750 vfs_quotactl_t vfs_stdquotactl;
751 vfs_statfs_t vfs_stdstatfs;
752 vfs_statvfs_t vfs_stdstatvfs;
753 vfs_sync_t vfs_stdsync;
754 vfs_sync_t vfs_stdnosync;
755 vfs_vget_t vfs_stdvget;
756 vfs_fhtovp_t vfs_stdfhtovp;
757 vfs_checkexp_t vfs_stdcheckexp;
758 vfs_vptofh_t vfs_stdvptofh;
759 vfs_init_t vfs_stdinit;
760 vfs_uninit_t vfs_stduninit;
761 vfs_extattrctl_t vfs_stdextattrctl;
762 vfs_acinit_t vfs_stdac_init;
763 vfs_acdone_t vfs_stdac_done;
764 vfs_account_t vfs_stdaccount;
765 vfs_account_t vfs_noaccount;
766 vfs_ncpgen_set_t vfs_stdncpgen_set;
767 vfs_ncpgen_test_t vfs_stdncpgen_test;
769 struct vop_access_args;
770 int vop_helper_access(struct vop_access_args *ap, uid_t ino_uid, gid_t ino_gid,
771 mode_t ino_mode, u_int32_t ino_flags);
772 int vop_helper_setattr_flags(u_int32_t *ino_flags, u_int32_t vaflags,
773 uid_t uid, struct ucred *cred);
774 uid_t vop_helper_create_uid(struct mount *mp, mode_t dmode, uid_t duid,
775 struct ucred *cred, mode_t *modep);
776 int vop_helper_chmod(struct vnode *vp, mode_t new_mode, struct ucred *cred,
777 uid_t cur_uid, gid_t cur_gid, mode_t *cur_modep);
778 int vop_helper_chown(struct vnode *vp, uid_t new_uid, gid_t new_gid,
780 uid_t *cur_uidp, gid_t *cur_gidp, mode_t *cur_modep);
781 int vop_helper_read_shortcut(struct vop_read_args *ap);
783 void add_bio_ops(struct bio_ops *ops);
784 void rem_bio_ops(struct bio_ops *ops);
786 int journal_mountctl(struct vop_mountctl_args *ap);
787 void journal_remove_all_journals(struct mount *mp, int flags);
789 void mountlist_insert(struct mount *, int);
790 int mountlist_interlock(int (*callback)(struct mount *), struct mount *);
791 struct mount *mountlist_boot_getfirst(void);
792 void mountlist_remove(struct mount *mp);
793 int mountlist_exists(struct mount *mp);
794 int mountlist_scan(int (*callback)(struct mount *, void *), void *, int);
795 struct mount *mount_get_by_nc(struct namecache *ncp);
798 #include <sys/cdefs.h>
801 int fstatfs (int, struct statfs *);
802 int getfh (const char *, fhandle_t *);
803 int getfsstat (struct statfs *, long, int);
804 int getmntinfo (struct statfs **, int);
805 int getmntvinfo (struct statfs **, struct statvfs **, int);
806 int mount (const char *, const char *, int, void *);
807 int statfs (const char *, struct statfs *);
808 int unmount (const char *, int);
809 int fhopen (const struct fhandle *, int);
810 int fhstat (const struct fhandle *, struct stat *);
811 int fhstatfs (const struct fhandle *, struct statfs *);
813 /* C library stuff */
814 void endvfsent (void);
815 struct ovfsconf *getvfsbyname (const char *);
816 struct ovfsconf *getvfsbytype (int);
817 struct ovfsconf *getvfsent (void);
818 #define getvfsbyname new_getvfsbyname
819 int new_getvfsbyname (const char *, struct vfsconf *);
820 void setvfsent (int);
821 int vfsisloadable (const char *);
822 int vfsload (const char *);
827 #endif /* !_SYS_MOUNT_H_ */