mount.h revision 122524
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: head/sys/sys/mount.h 122524 2003-11-12 03:14:31Z rwatson $ 35 */ 36 37#ifndef _SYS_MOUNT_H_ 38#define _SYS_MOUNT_H_ 39 40#include <sys/ucred.h> 41#include <sys/queue.h> 42#ifdef _KERNEL 43#include <sys/lockmgr.h> 44#include <sys/_lock.h> 45#include <sys/_mutex.h> 46#endif 47 48typedef struct fsid { int32_t val[2]; } fsid_t; /* filesystem id type */ 49 50/* 51 * File identifier. 52 * These are unique per filesystem on a single machine. 53 */ 54#define MAXFIDSZ 16 55 56struct fid { 57 u_short fid_len; /* length of data in bytes */ 58 u_short fid_reserved; /* force longword alignment */ 59 char fid_data[MAXFIDSZ]; /* data (variable length) */ 60}; 61 62/* 63 * filesystem statistics 64 */ 65 66#define MFSNAMELEN 16 /* length of fs type name, including null */ 67#define MNAMELEN (88 - 2 * sizeof(long)) /* size of on/from name bufs */ 68 69/* XXX getfsstat.2 is out of date with write and read counter changes here. */ 70/* XXX statfs.2 is out of date with read counter changes here. */ 71struct statfs { 72 long f_spare2; /* placeholder */ 73 long f_bsize; /* fundamental filesystem block size */ 74 long f_iosize; /* optimal transfer block size */ 75 long f_blocks; /* total data blocks in filesystem */ 76 long f_bfree; /* free blocks in fs */ 77 long f_bavail; /* free blocks avail to non-superuser */ 78 long f_files; /* total file nodes in filesystem */ 79 long f_ffree; /* free file nodes in fs */ 80 fsid_t f_fsid; /* filesystem id */ 81 uid_t f_owner; /* user that mounted the filesystem */ 82 int f_type; /* type of filesystem */ 83 int f_flags; /* copy of mount exported flags */ 84 long f_syncwrites; /* count of sync writes since mount */ 85 long f_asyncwrites; /* count of async writes since mount */ 86 char f_fstypename[MFSNAMELEN]; /* fs type name */ 87 char f_mntonname[MNAMELEN]; /* directory on which mounted */ 88 long f_syncreads; /* count of sync reads since mount */ 89 long f_asyncreads; /* count of async reads since mount */ 90 short f_spares1; /* unused spare */ 91 char f_mntfromname[MNAMELEN];/* mounted filesystem */ 92 short f_spares2; /* unused spare */ 93 /* 94 * XXX on machines where longs are aligned to 8-byte boundaries, there 95 * is an unnamed int32_t here. This spare was after the apparent end 96 * of the struct until we bit off the read counters from f_mntonname. 97 */ 98 long f_spare[2]; /* unused spare */ 99}; 100 101#ifdef _KERNEL 102#define MMAXOPTIONLEN 65536 /* maximum length of a mount option */ 103 104TAILQ_HEAD(vnodelst, vnode); 105TAILQ_HEAD(vfsoptlist, vfsopt); 106struct vfsopt { 107 TAILQ_ENTRY(vfsopt) link; 108 char *name; 109 void *value; 110 int len; 111}; 112 113/* 114 * Structure per mounted filesystem. Each mounted filesystem has an 115 * array of operations and an instance record. The filesystems are 116 * put on a doubly linked list. 117 * 118 * NOTE: mnt_nvnodelist and mnt_reservedvnlist. At the moment vnodes 119 * are linked into mnt_nvnodelist. At some point in the near future the 120 * vnode list will be split into a 'dirty' and 'clean' list. mnt_nvnodelist 121 * will become the dirty list and mnt_reservedvnlist will become the 'clean' 122 * list. Filesystem kld's syncing code should remain compatible since 123 * they only need to scan the dirty vnode list (nvnodelist -> dirtyvnodelist). 124 */ 125struct mount { 126 TAILQ_ENTRY(mount) mnt_list; /* mount list */ 127 struct vfsops *mnt_op; /* operations on fs */ 128 struct vfsconf *mnt_vfc; /* configuration info */ 129 struct vnode *mnt_vnodecovered; /* vnode we mounted on */ 130 struct vnode *mnt_syncer; /* syncer vnode */ 131 struct vnodelst mnt_nvnodelist; /* list of vnodes this mount */ 132 struct vnodelst mnt_reservedvnlist; /* (future) dirty vnode list */ 133 struct lock mnt_lock; /* mount structure lock */ 134 struct mtx mnt_mtx; /* mount structure interlock */ 135 int mnt_writeopcount; /* write syscalls in progress */ 136 int mnt_flag; /* flags shared with user */ 137 struct vfsoptlist *mnt_opt; /* current mount options */ 138 struct vfsoptlist *mnt_optnew; /* new options passed to fs */ 139 int mnt_kern_flag; /* kernel only flags */ 140 int mnt_maxsymlinklen; /* max size of short symlink */ 141 struct statfs mnt_stat; /* cache of filesystem stats */ 142 struct ucred *mnt_cred; /* credentials of mounter */ 143 qaddr_t mnt_data; /* private data */ 144 time_t mnt_time; /* last time written*/ 145 int mnt_iosize_max; /* max size for clusters, etc */ 146 struct netexport *mnt_export; /* export list */ 147 struct label *mnt_mntlabel; /* MAC label for the mount */ 148 struct label *mnt_fslabel; /* MAC label for the fs */ 149 int mnt_nvnodelistsize; /* # of vnodes on this mount */ 150}; 151 152 153#define MNT_ILOCK(mp) mtx_lock(&(mp)->mnt_mtx) 154#define MNT_IUNLOCK(mp) mtx_unlock(&(mp)->mnt_mtx) 155 156#endif /* _KERNEL */ 157 158/* 159 * User specifiable flags. 160 */ 161#define MNT_RDONLY 0x00000001 /* read only filesystem */ 162#define MNT_SYNCHRONOUS 0x00000002 /* filesystem written synchronously */ 163#define MNT_NOEXEC 0x00000004 /* can't exec from filesystem */ 164#define MNT_NOSUID 0x00000008 /* don't honor setuid bits on fs */ 165#define MNT_NODEV 0x00000010 /* don't interpret special files */ 166#define MNT_UNION 0x00000020 /* union with underlying filesystem */ 167#define MNT_ASYNC 0x00000040 /* filesystem written asynchronously */ 168#define MNT_SUIDDIR 0x00100000 /* special handling of SUID on dirs */ 169#define MNT_SOFTDEP 0x00200000 /* soft updates being done */ 170#define MNT_NOSYMFOLLOW 0x00400000 /* do not follow symlinks */ 171#define MNT_JAILDEVFS 0x02000000 /* jail-friendly DEVFS behaviour */ 172#define MNT_MULTILABEL 0x04000000 /* MAC support for individual objects */ 173#define MNT_ACLS 0x08000000 /* ACL support enabled */ 174#define MNT_NOATIME 0x10000000 /* disable update of file access time */ 175#define MNT_NOCLUSTERR 0x40000000 /* disable cluster read */ 176#define MNT_NOCLUSTERW 0x80000000 /* disable cluster write */ 177 178/* 179 * NFS export related mount flags. 180 */ 181#define MNT_EXRDONLY 0x00000080 /* exported read only */ 182#define MNT_EXPORTED 0x00000100 /* filesystem is exported */ 183#define MNT_DEFEXPORTED 0x00000200 /* exported to the world */ 184#define MNT_EXPORTANON 0x00000400 /* use anon uid mapping for everyone */ 185#define MNT_EXKERB 0x00000800 /* exported with Kerberos uid mapping */ 186#define MNT_EXPUBLIC 0x20000000 /* public export (WebNFS) */ 187 188/* 189 * Flags set by internal operations, 190 * but visible to the user. 191 * XXX some of these are not quite right.. (I've never seen the root flag set) 192 */ 193#define MNT_LOCAL 0x00001000 /* filesystem is stored locally */ 194#define MNT_QUOTA 0x00002000 /* quotas are enabled on filesystem */ 195#define MNT_ROOTFS 0x00004000 /* identifies the root filesystem */ 196#define MNT_USER 0x00008000 /* mounted by a user */ 197#define MNT_IGNORE 0x00800000 /* do not show entry in df */ 198 199/* 200 * Mask of flags that are visible to statfs(). 201 * XXX I think that this could now become (~(MNT_CMDFLAGS)) 202 * but the 'mount' program may need changing to handle this. 203 */ 204#define MNT_VISFLAGMASK (MNT_RDONLY | MNT_SYNCHRONOUS | MNT_NOEXEC | \ 205 MNT_NOSUID | MNT_NODEV | MNT_UNION | \ 206 MNT_ASYNC | MNT_EXRDONLY | MNT_EXPORTED | \ 207 MNT_DEFEXPORTED | MNT_EXPORTANON| MNT_EXKERB | \ 208 MNT_LOCAL | MNT_USER | MNT_QUOTA | \ 209 MNT_ROOTFS | MNT_NOATIME | MNT_NOCLUSTERR| \ 210 MNT_NOCLUSTERW | MNT_SUIDDIR | MNT_SOFTDEP | \ 211 MNT_IGNORE | MNT_EXPUBLIC | MNT_NOSYMFOLLOW | \ 212 MNT_JAILDEVFS | MNT_MULTILABEL | MNT_ACLS) 213 214/* Mask of flags that can be updated. */ 215#define MNT_UPDATEMASK (MNT_NOSUID | MNT_NOEXEC | MNT_NODEV | \ 216 MNT_SYNCHRONOUS | MNT_UNION | MNT_ASYNC | \ 217 MNT_NOATIME | \ 218 MNT_NOSYMFOLLOW | MNT_IGNORE | MNT_JAILDEVFS | \ 219 MNT_NOCLUSTERR | MNT_NOCLUSTERW | MNT_SUIDDIR | \ 220 MNT_ACLS ) 221 222/* 223 * External filesystem command modifier flags. 224 * Unmount can use the MNT_FORCE flag. 225 * XXX These are not STATES and really should be somewhere else. 226 */ 227#define MNT_UPDATE 0x00010000 /* not a real mount, just an update */ 228#define MNT_DELEXPORT 0x00020000 /* delete export host lists */ 229#define MNT_RELOAD 0x00040000 /* reload filesystem data */ 230#define MNT_FORCE 0x00080000 /* force unmount or readonly change */ 231#define MNT_SNAPSHOT 0x01000000 /* snapshot the filesystem */ 232#define MNT_BYFSID 0x08000000 /* specify filesystem by ID. */ 233#define MNT_CMDFLAGS (MNT_UPDATE | MNT_DELEXPORT | MNT_RELOAD | \ 234 MNT_FORCE | MNT_SNAPSHOT | MNT_BYFSID) 235/* 236 * Internal filesystem control flags stored in mnt_kern_flag. 237 * 238 * MNTK_UNMOUNT locks the mount entry so that name lookup cannot proceed 239 * past the mount point. This keeps the subtree stable during mounts 240 * and unmounts. 241 * 242 * MNTK_UNMOUNTF permits filesystems to detect a forced unmount while 243 * dounmount() is still waiting to lock the mountpoint. This allows 244 * the filesystem to cancel operations that might otherwise deadlock 245 * with the unmount attempt (used by NFS). 246 */ 247#define MNTK_UNMOUNTF 0x00000001 /* forced unmount in progress */ 248#define MNTK_UNMOUNT 0x01000000 /* unmount in progress */ 249#define MNTK_MWAIT 0x02000000 /* waiting for unmount to finish */ 250#define MNTK_WANTRDWR 0x04000000 /* upgrade to read/write requested */ 251#define MNTK_SUSPEND 0x08000000 /* request write suspension */ 252#define MNTK_SUSPENDED 0x10000000 /* write operations are suspended */ 253 254/* 255 * Sysctl CTL_VFS definitions. 256 * 257 * Second level identifier specifies which filesystem. Second level 258 * identifier VFS_VFSCONF returns information about all filesystems. 259 * Second level identifier VFS_GENERIC is non-terminal. 260 */ 261#define VFS_VFSCONF 0 /* get configured filesystems */ 262#define VFS_GENERIC 0 /* generic filesystem information */ 263/* 264 * Third level identifiers for VFS_GENERIC are given below; third 265 * level identifiers for specific filesystems are given in their 266 * mount specific header files. 267 */ 268#define VFS_MAXTYPENUM 1 /* int: highest defined filesystem type */ 269#define VFS_CONF 2 /* struct: vfsconf for filesystem given 270 as next argument */ 271 272/* 273 * Flags for various system call interfaces. 274 * 275 * waitfor flags to vfs_sync() and getfsstat() 276 */ 277#define MNT_WAIT 1 /* synchronously wait for I/O to complete */ 278#define MNT_NOWAIT 2 /* start all I/O, but do not wait for it */ 279#define MNT_LAZY 3 /* push data not written by filesystem syncer */ 280 281/* 282 * Generic file handle 283 */ 284struct fhandle { 285 fsid_t fh_fsid; /* Filesystem id of mount point */ 286 struct fid fh_fid; /* Filesys specific id */ 287}; 288typedef struct fhandle fhandle_t; 289 290/* 291 * Export arguments for local filesystem mount calls. 292 */ 293struct export_args { 294 int ex_flags; /* export related flags */ 295 uid_t ex_root; /* mapping for root uid */ 296 struct xucred ex_anon; /* mapping for anonymous user */ 297 struct sockaddr *ex_addr; /* net address to which exported */ 298 u_char ex_addrlen; /* and the net address length */ 299 struct sockaddr *ex_mask; /* mask of valid bits in saddr */ 300 u_char ex_masklen; /* and the smask length */ 301 char *ex_indexfile; /* index file for WebNFS URLs */ 302}; 303 304/* 305 * Structure holding information for a publicly exported filesystem 306 * (WebNFS). Currently the specs allow just for one such filesystem. 307 */ 308struct nfs_public { 309 int np_valid; /* Do we hold valid information */ 310 fhandle_t np_handle; /* Filehandle for pub fs (internal) */ 311 struct mount *np_mount; /* Mountpoint of exported fs */ 312 char *np_index; /* Index file */ 313}; 314 315/* 316 * Filesystem configuration information. One of these exists for each 317 * type of filesystem supported by the kernel. These are searched at 318 * mount time to identify the requested filesystem. 319 */ 320struct vfsconf { 321 struct vfsops *vfc_vfsops; /* filesystem operations vector */ 322 char vfc_name[MFSNAMELEN]; /* filesystem type name */ 323 int vfc_typenum; /* historic filesystem type number */ 324 int vfc_refcount; /* number mounted of this type */ 325 int vfc_flags; /* permanent flags */ 326 struct vfsoptdecl *vfc_opts; /* mount options */ 327 struct vfsconf *vfc_next; /* next in list */ 328}; 329 330/* Userland version of the struct vfsconf. */ 331struct xvfsconf { 332 struct vfsops *vfc_vfsops; /* filesystem operations vector */ 333 char vfc_name[MFSNAMELEN]; /* filesystem type name */ 334 int vfc_typenum; /* historic filesystem type number */ 335 int vfc_refcount; /* number mounted of this type */ 336 int vfc_flags; /* permanent flags */ 337 struct vfsconf *vfc_next; /* next in list */ 338}; 339 340struct ovfsconf { 341 void *vfc_vfsops; 342 char vfc_name[32]; 343 int vfc_index; 344 int vfc_refcount; 345 int vfc_flags; 346}; 347 348/* 349 * NB: these flags refer to IMPLEMENTATION properties, not properties of 350 * any actual mounts; i.e., it does not make sense to change the flags. 351 */ 352#define VFCF_STATIC 0x00010000 /* statically compiled into kernel */ 353#define VFCF_NETWORK 0x00020000 /* may get data over the network */ 354#define VFCF_READONLY 0x00040000 /* writes are not implemented */ 355#define VFCF_SYNTHETIC 0x00080000 /* data does not represent real files */ 356#define VFCF_LOOPBACK 0x00100000 /* aliases some other mounted FS */ 357#define VFCF_UNICODE 0x00200000 /* stores file names as Unicode*/ 358 359struct iovec; 360struct uio; 361 362#ifdef _KERNEL 363 364#ifdef MALLOC_DECLARE 365MALLOC_DECLARE(M_MOUNT); 366#endif 367extern int maxvfsconf; /* highest defined filesystem type */ 368extern int nfs_mount_type; /* vfc_typenum for nfs, or -1 */ 369extern struct vfsconf *vfsconf; /* head of list of filesystem types */ 370 371/* 372 * Operations supported on mounted filesystem. 373 */ 374struct mount_args; 375struct nameidata; 376 377typedef int vfs_mount_t(struct mount *mp, char *path, caddr_t data, 378 struct nameidata *ndp, struct thread *td); 379typedef int vfs_start_t(struct mount *mp, int flags, struct thread *td); 380typedef int vfs_unmount_t(struct mount *mp, int mntflags, struct thread *td); 381typedef int vfs_root_t(struct mount *mp, struct vnode **vpp); 382typedef int vfs_quotactl_t(struct mount *mp, int cmds, uid_t uid, 383 caddr_t arg, struct thread *td); 384typedef int vfs_statfs_t(struct mount *mp, struct statfs *sbp, 385 struct thread *td); 386typedef int vfs_sync_t(struct mount *mp, int waitfor, struct ucred *cred, 387 struct thread *td); 388typedef int vfs_vget_t(struct mount *mp, ino_t ino, int flags, 389 struct vnode **vpp); 390typedef int vfs_fhtovp_t(struct mount *mp, struct fid *fhp, struct vnode **vpp); 391typedef int vfs_checkexp_t(struct mount *mp, struct sockaddr *nam, 392 int *extflagsp, struct ucred **credanonp); 393typedef int vfs_vptofh_t(struct vnode *vp, struct fid *fhp); 394typedef int vfs_init_t(struct vfsconf *); 395typedef int vfs_uninit_t(struct vfsconf *); 396typedef int vfs_extattrctl_t(struct mount *mp, int cmd, 397 struct vnode *filename_vp, int attrnamespace, 398 const char *attrname, struct thread *td); 399typedef int vfs_nmount_t(struct mount *mp, struct nameidata *ndp, 400 struct thread *td); 401 402struct vfsops { 403 vfs_mount_t *vfs_mount; 404 vfs_start_t *vfs_start; 405 vfs_unmount_t *vfs_unmount; 406 vfs_root_t *vfs_root; 407 vfs_quotactl_t *vfs_quotactl; 408 vfs_statfs_t *vfs_statfs; 409 vfs_sync_t *vfs_sync; 410 vfs_vget_t *vfs_vget; 411 vfs_fhtovp_t *vfs_fhtovp; 412 vfs_checkexp_t *vfs_checkexp; 413 vfs_vptofh_t *vfs_vptofh; 414 vfs_init_t *vfs_init; 415 vfs_uninit_t *vfs_uninit; 416 vfs_extattrctl_t *vfs_extattrctl; 417 /* Additions below are not binary compatible with 5.0 and below. */ 418 vfs_nmount_t *vfs_nmount; 419}; 420 421#define VFS_NMOUNT(MP, NDP, P) (*(MP)->mnt_op->vfs_nmount)(MP, NDP, P) 422#define VFS_MOUNT(MP, PATH, DATA, NDP, P) \ 423 (*(MP)->mnt_op->vfs_mount)(MP, PATH, DATA, NDP, P) 424#define VFS_START(MP, FLAGS, P) (*(MP)->mnt_op->vfs_start)(MP, FLAGS, P) 425#define VFS_UNMOUNT(MP, FORCE, P) (*(MP)->mnt_op->vfs_unmount)(MP, FORCE, P) 426#define VFS_ROOT(MP, VPP) (*(MP)->mnt_op->vfs_root)(MP, VPP) 427#define VFS_QUOTACTL(MP,C,U,A,P) (*(MP)->mnt_op->vfs_quotactl)(MP, C, U, A, P) 428#define VFS_STATFS(MP, SBP, P) (*(MP)->mnt_op->vfs_statfs)(MP, SBP, P) 429#define VFS_SYNC(MP, WAIT, C, P) (*(MP)->mnt_op->vfs_sync)(MP, WAIT, C, P) 430#define VFS_VGET(MP, INO, FLAGS, VPP) \ 431 (*(MP)->mnt_op->vfs_vget)(MP, INO, FLAGS, VPP) 432#define VFS_FHTOVP(MP, FIDP, VPP) \ 433 (*(MP)->mnt_op->vfs_fhtovp)(MP, FIDP, VPP) 434#define VFS_VPTOFH(VP, FIDP) (*(VP)->v_mount->mnt_op->vfs_vptofh)(VP, FIDP) 435#define VFS_CHECKEXP(MP, NAM, EXFLG, CRED) \ 436 (*(MP)->mnt_op->vfs_checkexp)(MP, NAM, EXFLG, CRED) 437#define VFS_EXTATTRCTL(MP, C, FN, NS, N, P) \ 438 (*(MP)->mnt_op->vfs_extattrctl)(MP, C, FN, NS, N, P) 439 440#include <sys/module.h> 441 442#define VFS_SET(vfsops, fsname, flags) \ 443 static struct vfsconf fsname ## _vfsconf = { \ 444 &vfsops, \ 445 #fsname, \ 446 -1, \ 447 0, \ 448 flags \ 449 }; \ 450 static moduledata_t fsname ## _mod = { \ 451 #fsname, \ 452 vfs_modevent, \ 453 & fsname ## _vfsconf \ 454 }; \ 455 DECLARE_MODULE(fsname, fsname ## _mod, SI_SUB_VFS, SI_ORDER_MIDDLE) 456 457extern char *mountrootfsname; 458 459/* 460 * exported vnode operations 461 */ 462int dounmount(struct mount *, int, struct thread *td); 463int kernel_mount(struct iovec *iovp, unsigned int iovcnt, int flags); 464int kernel_vmount(int flags, ...); 465int vfs_getopt(struct vfsoptlist *, const char *, void **, int *); 466int vfs_copyopt(struct vfsoptlist *, const char *, void *, int); 467int vfs_mount(struct thread *td, const char *type, char *path, 468 int flags, void *data); 469int vfs_setpublicfs /* set publicly exported fs */ 470 (struct mount *, struct netexport *, struct export_args *); 471int vfs_lock(struct mount *); /* lock a vfs */ 472void vfs_msync(struct mount *, int); 473void vfs_unlock(struct mount *); /* unlock a vfs */ 474int vfs_busy(struct mount *, int, struct mtx *, struct thread *td); 475int vfs_export /* process mount export info */ 476 (struct mount *, struct export_args *); 477struct netcred *vfs_export_lookup /* lookup host in fs export list */ 478 (struct mount *, struct sockaddr *); 479int vfs_allocate_syncvnode(struct mount *); 480void vfs_getnewfsid(struct mount *); 481dev_t vfs_getrootfsid(struct mount *); 482struct mount *vfs_getvfs(fsid_t *); /* return vfs given fsid */ 483int vfs_modevent(module_t, int, void *); 484int vfs_mountedon(struct vnode *); /* is a vfs mounted on vp */ 485void vfs_mountroot(void); /* mount our root filesystem */ 486int vfs_rootmountalloc(char *, char *, struct mount **); 487void vfs_mount_destroy(struct mount *, struct thread *); 488void vfs_unbusy(struct mount *, struct thread *td); 489void vfs_unmountall(void); 490int vfs_register(struct vfsconf *); 491int vfs_unregister(struct vfsconf *); 492extern TAILQ_HEAD(mntlist, mount) mountlist; /* mounted filesystem list */ 493extern struct mtx mountlist_mtx; 494extern struct nfs_public nfs_pub; 495 496/* 497 * Declarations for these vfs default operations are located in 498 * kern/vfs_default.c, they should be used instead of making "dummy" 499 * functions or casting entries in the VFS op table to "enopnotsupp()". 500 */ 501vfs_start_t vfs_stdstart; 502vfs_root_t vfs_stdroot; 503vfs_quotactl_t vfs_stdquotactl; 504vfs_statfs_t vfs_stdstatfs; 505vfs_sync_t vfs_stdsync; 506vfs_sync_t vfs_stdnosync; 507vfs_vget_t vfs_stdvget; 508vfs_fhtovp_t vfs_stdfhtovp; 509vfs_checkexp_t vfs_stdcheckexp; 510vfs_vptofh_t vfs_stdvptofh; 511vfs_init_t vfs_stdinit; 512vfs_uninit_t vfs_stduninit; 513vfs_extattrctl_t vfs_stdextattrctl; 514 515/* XXX - these should be indirect functions!!! */ 516int softdep_fsync(struct vnode *); 517int softdep_process_worklist(struct mount *); 518 519#else /* !_KERNEL */ 520 521#include <sys/cdefs.h> 522 523struct stat; 524 525__BEGIN_DECLS 526int fhopen(const struct fhandle *, int); 527int fhstat(const struct fhandle *, struct stat *); 528int fhstatfs(const struct fhandle *, struct statfs *); 529int fstatfs(int, struct statfs *); 530int getfh(const char *, fhandle_t *); 531int getfsstat(struct statfs *, long, int); 532int getmntinfo(struct statfs **, int); 533int mount(const char *, const char *, int, void *); 534int nmount(struct iovec *, u_int, int); 535int statfs(const char *, struct statfs *); 536int unmount(const char *, int); 537 538/* C library stuff */ 539void endvfsent(void); 540struct ovfsconf *getvfsbytype(int); 541struct ovfsconf *getvfsent(void); 542int getvfsbyname(const char *, struct xvfsconf *); 543void setvfsent(int); 544int vfsisloadable(const char *); 545int vfsload(const char *); 546__END_DECLS 547 548#endif /* _KERNEL */ 549 550#endif /* !_SYS_MOUNT_H_ */ 551