mount.h revision 130585
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 * 4. 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. 16 * 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 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 * 29 * @(#)mount.h 8.21 (Berkeley) 5/20/95 30 * $FreeBSD: head/sys/sys/mount.h 130585 2004-06-16 09:47:26Z phk $ 31 */ 32 33#ifndef _SYS_MOUNT_H_ 34#define _SYS_MOUNT_H_ 35 36#include <sys/ucred.h> 37#include <sys/queue.h> 38#ifdef _KERNEL 39#include <sys/lockmgr.h> 40#include <sys/_lock.h> 41#include <sys/_mutex.h> 42#endif 43 44typedef struct fsid { int32_t val[2]; } fsid_t; /* filesystem id type */ 45 46/* 47 * File identifier. 48 * These are unique per filesystem on a single machine. 49 */ 50#define MAXFIDSZ 16 51 52struct fid { 53 u_short fid_len; /* length of data in bytes */ 54 u_short fid_reserved; /* force longword alignment */ 55 char fid_data[MAXFIDSZ]; /* data (variable length) */ 56}; 57 58/* 59 * filesystem statistics 60 */ 61#define MFSNAMELEN 16 /* length of type name including null */ 62#define MNAMELEN 88 /* size of on/from name bufs */ 63#define STATFS_VERSION 0x20030518 /* current version number */ 64struct statfs { 65 uint32_t f_version; /* structure version number */ 66 uint32_t f_type; /* type of filesystem */ 67 uint64_t f_flags; /* copy of mount exported flags */ 68 uint64_t f_bsize; /* filesystem fragment size */ 69 uint64_t f_iosize; /* optimal transfer block size */ 70 uint64_t f_blocks; /* total data blocks in filesystem */ 71 uint64_t f_bfree; /* free blocks in filesystem */ 72 int64_t f_bavail; /* free blocks avail to non-superuser */ 73 uint64_t f_files; /* total file nodes in filesystem */ 74 int64_t f_ffree; /* free nodes avail to non-superuser */ 75 uint64_t f_syncwrites; /* count of sync writes since mount */ 76 uint64_t f_asyncwrites; /* count of async writes since mount */ 77 uint64_t f_syncreads; /* count of sync reads since mount */ 78 uint64_t f_asyncreads; /* count of async reads since mount */ 79 uint64_t f_spare[10]; /* unused spare */ 80 uint32_t f_namemax; /* maximum filename length */ 81 uid_t f_owner; /* user that mounted the filesystem */ 82 fsid_t f_fsid; /* filesystem id */ 83 char f_charspare[80]; /* spare string space */ 84 char f_fstypename[MFSNAMELEN]; /* filesystem type name */ 85 char f_mntfromname[MNAMELEN]; /* mounted filesystem */ 86 char f_mntonname[MNAMELEN]; /* directory on which mounted */ 87}; 88 89#ifdef _KERNEL 90#define OMFSNAMELEN 16 /* length of fs type name, including null */ 91#define OMNAMELEN (88 - 2 * sizeof(long)) /* size of on/from name bufs */ 92 93/* XXX getfsstat.2 is out of date with write and read counter changes here. */ 94/* XXX statfs.2 is out of date with read counter changes here. */ 95struct ostatfs { 96 long f_spare2; /* placeholder */ 97 long f_bsize; /* fundamental filesystem block size */ 98 long f_iosize; /* optimal transfer block size */ 99 long f_blocks; /* total data blocks in filesystem */ 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 filesystem */ 103 long f_ffree; /* free file nodes in fs */ 104 fsid_t f_fsid; /* filesystem 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[OMFSNAMELEN]; /* fs type name */ 111 char f_mntonname[OMNAMELEN]; /* 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[OMNAMELEN];/* mounted filesystem */ 116 short f_spares2; /* unused spare */ 117 /* 118 * XXX on machines where longs are aligned to 8-byte boundaries, there 119 * is an unnamed int32_t here. This spare was after the apparent end 120 * of the struct until we bit off the read counters from f_mntonname. 121 */ 122 long f_spare[2]; /* unused spare */ 123}; 124 125#define MMAXOPTIONLEN 65536 /* maximum length of a mount option */ 126 127TAILQ_HEAD(vnodelst, vnode); 128TAILQ_HEAD(vfsoptlist, vfsopt); 129struct vfsopt { 130 TAILQ_ENTRY(vfsopt) link; 131 char *name; 132 void *value; 133 int len; 134}; 135 136/* 137 * Structure per mounted filesystem. Each mounted filesystem has an 138 * array of operations and an instance record. The filesystems are 139 * put on a doubly linked list. 140 * 141 */ 142struct mount { 143 TAILQ_ENTRY(mount) mnt_list; /* mount list */ 144 struct vfsops *mnt_op; /* operations on fs */ 145 struct vfsconf *mnt_vfc; /* configuration info */ 146 struct vnode *mnt_vnodecovered; /* vnode we mounted on */ 147 struct vnode *mnt_syncer; /* syncer vnode */ 148 struct vnodelst mnt_nvnodelist; /* list of vnodes this mount */ 149 struct lock mnt_lock; /* mount structure lock */ 150 struct mtx mnt_mtx; /* mount structure interlock */ 151 int mnt_writeopcount; /* write syscalls in progress */ 152 int mnt_flag; /* flags shared with user */ 153 struct vfsoptlist *mnt_opt; /* current mount options */ 154 struct vfsoptlist *mnt_optnew; /* new options passed to fs */ 155 int mnt_kern_flag; /* kernel only flags */ 156 int mnt_maxsymlinklen; /* max size of short symlink */ 157 struct statfs mnt_stat; /* cache of filesystem stats */ 158 struct ucred *mnt_cred; /* credentials of mounter */ 159 qaddr_t mnt_data; /* private data */ 160 time_t mnt_time; /* last time written*/ 161 int mnt_iosize_max; /* max size for clusters, etc */ 162 struct netexport *mnt_export; /* export list */ 163 struct label *mnt_mntlabel; /* MAC label for the mount */ 164 struct label *mnt_fslabel; /* MAC label for the fs */ 165 int mnt_nvnodelistsize; /* # of vnodes on this mount */ 166}; 167 168 169#define MNT_ILOCK(mp) mtx_lock(&(mp)->mnt_mtx) 170#define MNT_IUNLOCK(mp) mtx_unlock(&(mp)->mnt_mtx) 171 172#endif /* _KERNEL */ 173 174/* 175 * User specifiable flags. 176 */ 177#define MNT_RDONLY 0x00000001 /* read only filesystem */ 178#define MNT_SYNCHRONOUS 0x00000002 /* filesystem written synchronously */ 179#define MNT_NOEXEC 0x00000004 /* can't exec from filesystem */ 180#define MNT_NOSUID 0x00000008 /* don't honor setuid bits on fs */ 181#define MNT_NODEV 0x00000010 /* don't interpret special files */ 182#define MNT_UNION 0x00000020 /* union with underlying filesystem */ 183#define MNT_ASYNC 0x00000040 /* filesystem written asynchronously */ 184#define MNT_SUIDDIR 0x00100000 /* special handling of SUID on dirs */ 185#define MNT_SOFTDEP 0x00200000 /* soft updates being done */ 186#define MNT_NOSYMFOLLOW 0x00400000 /* do not follow symlinks */ 187#define MNT_JAILDEVFS 0x02000000 /* jail-friendly DEVFS behaviour */ 188#define MNT_MULTILABEL 0x04000000 /* MAC support for individual objects */ 189#define MNT_ACLS 0x08000000 /* ACL support enabled */ 190#define MNT_NOATIME 0x10000000 /* disable update of file access time */ 191#define MNT_NOCLUSTERR 0x40000000 /* disable cluster read */ 192#define MNT_NOCLUSTERW 0x80000000 /* disable cluster write */ 193 194/* 195 * NFS export related mount flags. 196 */ 197#define MNT_EXRDONLY 0x00000080 /* exported read only */ 198#define MNT_EXPORTED 0x00000100 /* filesystem is exported */ 199#define MNT_DEFEXPORTED 0x00000200 /* exported to the world */ 200#define MNT_EXPORTANON 0x00000400 /* use anon uid mapping for everyone */ 201#define MNT_EXKERB 0x00000800 /* exported with Kerberos uid mapping */ 202#define MNT_EXPUBLIC 0x20000000 /* public export (WebNFS) */ 203 204/* 205 * Flags set by internal operations, 206 * but visible to the user. 207 * XXX some of these are not quite right.. (I've never seen the root flag set) 208 */ 209#define MNT_LOCAL 0x00001000 /* filesystem is stored locally */ 210#define MNT_QUOTA 0x00002000 /* quotas are enabled on filesystem */ 211#define MNT_ROOTFS 0x00004000 /* identifies the root filesystem */ 212#define MNT_USER 0x00008000 /* mounted by a user */ 213#define MNT_IGNORE 0x00800000 /* do not show entry in df */ 214 215/* 216 * Mask of flags that are visible to statfs(). 217 * XXX I think that this could now become (~(MNT_CMDFLAGS)) 218 * but the 'mount' program may need changing to handle this. 219 */ 220#define MNT_VISFLAGMASK (MNT_RDONLY | MNT_SYNCHRONOUS | MNT_NOEXEC | \ 221 MNT_NOSUID | MNT_NODEV | MNT_UNION | \ 222 MNT_ASYNC | MNT_EXRDONLY | MNT_EXPORTED | \ 223 MNT_DEFEXPORTED | MNT_EXPORTANON| MNT_EXKERB | \ 224 MNT_LOCAL | MNT_USER | MNT_QUOTA | \ 225 MNT_ROOTFS | MNT_NOATIME | MNT_NOCLUSTERR| \ 226 MNT_NOCLUSTERW | MNT_SUIDDIR | MNT_SOFTDEP | \ 227 MNT_IGNORE | MNT_EXPUBLIC | MNT_NOSYMFOLLOW | \ 228 MNT_JAILDEVFS | MNT_MULTILABEL | MNT_ACLS) 229 230/* Mask of flags that can be updated. */ 231#define MNT_UPDATEMASK (MNT_NOSUID | MNT_NOEXEC | MNT_NODEV | \ 232 MNT_SYNCHRONOUS | MNT_UNION | MNT_ASYNC | \ 233 MNT_NOATIME | \ 234 MNT_NOSYMFOLLOW | MNT_IGNORE | MNT_JAILDEVFS | \ 235 MNT_NOCLUSTERR | MNT_NOCLUSTERW | MNT_SUIDDIR | \ 236 MNT_ACLS | MNT_USER) 237 238/* 239 * External filesystem command modifier flags. 240 * Unmount can use the MNT_FORCE flag. 241 * XXX These are not STATES and really should be somewhere else. 242 */ 243#define MNT_UPDATE 0x00010000 /* not a real mount, just an update */ 244#define MNT_DELEXPORT 0x00020000 /* delete export host lists */ 245#define MNT_RELOAD 0x00040000 /* reload filesystem data */ 246#define MNT_FORCE 0x00080000 /* force unmount or readonly change */ 247#define MNT_SNAPSHOT 0x01000000 /* snapshot the filesystem */ 248#define MNT_BYFSID 0x08000000 /* specify filesystem by ID. */ 249#define MNT_CMDFLAGS (MNT_UPDATE | MNT_DELEXPORT | MNT_RELOAD | \ 250 MNT_FORCE | MNT_SNAPSHOT | MNT_BYFSID) 251/* 252 * Internal filesystem control flags stored in mnt_kern_flag. 253 * 254 * MNTK_UNMOUNT locks the mount entry so that name lookup cannot proceed 255 * past the mount point. This keeps the subtree stable during mounts 256 * and unmounts. 257 * 258 * MNTK_UNMOUNTF permits filesystems to detect a forced unmount while 259 * dounmount() is still waiting to lock the mountpoint. This allows 260 * the filesystem to cancel operations that might otherwise deadlock 261 * with the unmount attempt (used by NFS). 262 */ 263#define MNTK_UNMOUNTF 0x00000001 /* forced unmount in progress */ 264#define MNTK_UNMOUNT 0x01000000 /* unmount in progress */ 265#define MNTK_MWAIT 0x02000000 /* waiting for unmount to finish */ 266#define MNTK_WANTRDWR 0x04000000 /* upgrade to read/write requested */ 267#define MNTK_SUSPEND 0x08000000 /* request write suspension */ 268#define MNTK_SUSPENDED 0x10000000 /* write operations are suspended */ 269 270/* 271 * Sysctl CTL_VFS definitions. 272 * 273 * Second level identifier specifies which filesystem. Second level 274 * identifier VFS_VFSCONF returns information about all filesystems. 275 * Second level identifier VFS_GENERIC is non-terminal. 276 */ 277#define VFS_VFSCONF 0 /* get configured filesystems */ 278#define VFS_GENERIC 0 /* generic filesystem information */ 279/* 280 * Third level identifiers for VFS_GENERIC are given below; third 281 * level identifiers for specific filesystems are given in their 282 * mount specific header files. 283 */ 284#define VFS_MAXTYPENUM 1 /* int: highest defined filesystem type */ 285#define VFS_CONF 2 /* struct: vfsconf for filesystem given 286 as next argument */ 287 288/* 289 * Flags for various system call interfaces. 290 * 291 * waitfor flags to vfs_sync() and getfsstat() 292 */ 293#define MNT_WAIT 1 /* synchronously wait for I/O to complete */ 294#define MNT_NOWAIT 2 /* start all I/O, but do not wait for it */ 295#define MNT_LAZY 3 /* push data not written by filesystem syncer */ 296 297/* 298 * Generic file handle 299 */ 300struct fhandle { 301 fsid_t fh_fsid; /* Filesystem id of mount point */ 302 struct fid fh_fid; /* Filesys specific id */ 303}; 304typedef struct fhandle fhandle_t; 305 306/* 307 * Export arguments for local filesystem mount calls. 308 */ 309struct export_args { 310 int ex_flags; /* export related flags */ 311 uid_t ex_root; /* mapping for root uid */ 312 struct xucred ex_anon; /* mapping for anonymous user */ 313 struct sockaddr *ex_addr; /* net address to which exported */ 314 u_char ex_addrlen; /* and the net address length */ 315 struct sockaddr *ex_mask; /* mask of valid bits in saddr */ 316 u_char ex_masklen; /* and the smask length */ 317 char *ex_indexfile; /* index file for WebNFS URLs */ 318}; 319 320/* 321 * Structure holding information for a publicly exported filesystem 322 * (WebNFS). Currently the specs allow just for one such filesystem. 323 */ 324struct nfs_public { 325 int np_valid; /* Do we hold valid information */ 326 fhandle_t np_handle; /* Filehandle for pub fs (internal) */ 327 struct mount *np_mount; /* Mountpoint of exported fs */ 328 char *np_index; /* Index file */ 329}; 330 331/* 332 * Filesystem configuration information. One of these exists for each 333 * type of filesystem supported by the kernel. These are searched at 334 * mount time to identify the requested filesystem. 335 */ 336struct vfsconf { 337 struct vfsops *vfc_vfsops; /* filesystem operations vector */ 338 char vfc_name[MFSNAMELEN]; /* filesystem type name */ 339 int vfc_typenum; /* historic filesystem type number */ 340 int vfc_refcount; /* number mounted of this type */ 341 int vfc_flags; /* permanent flags */ 342 struct vfsoptdecl *vfc_opts; /* mount options */ 343 struct vfsconf *vfc_next; /* next in list */ 344}; 345 346/* Userland version of the struct vfsconf. */ 347struct xvfsconf { 348 struct vfsops *vfc_vfsops; /* filesystem operations vector */ 349 char vfc_name[MFSNAMELEN]; /* filesystem type name */ 350 int vfc_typenum; /* historic filesystem type number */ 351 int vfc_refcount; /* number mounted of this type */ 352 int vfc_flags; /* permanent flags */ 353 struct vfsconf *vfc_next; /* next in list */ 354}; 355 356#ifndef BURN_BRIDGES 357struct ovfsconf { 358 void *vfc_vfsops; 359 char vfc_name[32]; 360 int vfc_index; 361 int vfc_refcount; 362 int vfc_flags; 363}; 364#endif 365 366/* 367 * NB: these flags refer to IMPLEMENTATION properties, not properties of 368 * any actual mounts; i.e., it does not make sense to change the flags. 369 */ 370#define VFCF_STATIC 0x00010000 /* statically compiled into kernel */ 371#define VFCF_NETWORK 0x00020000 /* may get data over the network */ 372#define VFCF_READONLY 0x00040000 /* writes are not implemented */ 373#define VFCF_SYNTHETIC 0x00080000 /* data does not represent real files */ 374#define VFCF_LOOPBACK 0x00100000 /* aliases some other mounted FS */ 375#define VFCF_UNICODE 0x00200000 /* stores file names as Unicode*/ 376 377struct iovec; 378struct uio; 379 380#ifdef _KERNEL 381 382#ifdef MALLOC_DECLARE 383MALLOC_DECLARE(M_MOUNT); 384#endif 385extern int maxvfsconf; /* highest defined filesystem type */ 386extern int nfs_mount_type; /* vfc_typenum for nfs, or -1 */ 387extern struct vfsconf *vfsconf; /* head of list of filesystem types */ 388 389/* 390 * Operations supported on mounted filesystem. 391 */ 392struct mount_args; 393struct nameidata; 394 395typedef int vfs_mount_t(struct mount *mp, char *path, caddr_t data, 396 struct nameidata *ndp, struct thread *td); 397typedef int vfs_start_t(struct mount *mp, int flags, struct thread *td); 398typedef int vfs_unmount_t(struct mount *mp, int mntflags, struct thread *td); 399typedef int vfs_root_t(struct mount *mp, struct vnode **vpp); 400typedef int vfs_quotactl_t(struct mount *mp, int cmds, uid_t uid, 401 caddr_t arg, struct thread *td); 402typedef int vfs_statfs_t(struct mount *mp, struct statfs *sbp, 403 struct thread *td); 404typedef int vfs_sync_t(struct mount *mp, int waitfor, struct ucred *cred, 405 struct thread *td); 406typedef int vfs_vget_t(struct mount *mp, ino_t ino, int flags, 407 struct vnode **vpp); 408typedef int vfs_fhtovp_t(struct mount *mp, struct fid *fhp, struct vnode **vpp); 409typedef int vfs_checkexp_t(struct mount *mp, struct sockaddr *nam, 410 int *extflagsp, struct ucred **credanonp); 411typedef int vfs_vptofh_t(struct vnode *vp, struct fid *fhp); 412typedef int vfs_init_t(struct vfsconf *); 413typedef int vfs_uninit_t(struct vfsconf *); 414typedef int vfs_extattrctl_t(struct mount *mp, int cmd, 415 struct vnode *filename_vp, int attrnamespace, 416 const char *attrname, struct thread *td); 417typedef int vfs_nmount_t(struct mount *mp, struct nameidata *ndp, 418 struct thread *td); 419 420struct vfsops { 421 vfs_mount_t *vfs_mount; 422 vfs_start_t *vfs_start; 423 vfs_unmount_t *vfs_unmount; 424 vfs_root_t *vfs_root; 425 vfs_quotactl_t *vfs_quotactl; 426 vfs_statfs_t *vfs_statfs; 427 vfs_sync_t *vfs_sync; 428 vfs_vget_t *vfs_vget; 429 vfs_fhtovp_t *vfs_fhtovp; 430 vfs_checkexp_t *vfs_checkexp; 431 vfs_vptofh_t *vfs_vptofh; 432 vfs_init_t *vfs_init; 433 vfs_uninit_t *vfs_uninit; 434 vfs_extattrctl_t *vfs_extattrctl; 435 /* Additions below are not binary compatible with 5.0 and below. */ 436 vfs_nmount_t *vfs_nmount; 437}; 438 439#define VFS_NMOUNT(MP, NDP, P) (*(MP)->mnt_op->vfs_nmount)(MP, NDP, P) 440#define VFS_MOUNT(MP, PATH, DATA, NDP, P) \ 441 (*(MP)->mnt_op->vfs_mount)(MP, PATH, DATA, NDP, P) 442#define VFS_START(MP, FLAGS, P) (*(MP)->mnt_op->vfs_start)(MP, FLAGS, P) 443#define VFS_UNMOUNT(MP, FORCE, P) (*(MP)->mnt_op->vfs_unmount)(MP, FORCE, P) 444#define VFS_ROOT(MP, VPP) (*(MP)->mnt_op->vfs_root)(MP, VPP) 445#define VFS_QUOTACTL(MP,C,U,A,P) (*(MP)->mnt_op->vfs_quotactl)(MP, C, U, A, P) 446#define VFS_STATFS(MP, SBP, P) (*(MP)->mnt_op->vfs_statfs)(MP, SBP, P) 447#define VFS_SYNC(MP, WAIT, C, P) (*(MP)->mnt_op->vfs_sync)(MP, WAIT, C, P) 448#define VFS_VGET(MP, INO, FLAGS, VPP) \ 449 (*(MP)->mnt_op->vfs_vget)(MP, INO, FLAGS, VPP) 450#define VFS_FHTOVP(MP, FIDP, VPP) \ 451 (*(MP)->mnt_op->vfs_fhtovp)(MP, FIDP, VPP) 452#define VFS_VPTOFH(VP, FIDP) (*(VP)->v_mount->mnt_op->vfs_vptofh)(VP, FIDP) 453#define VFS_CHECKEXP(MP, NAM, EXFLG, CRED) \ 454 (*(MP)->mnt_op->vfs_checkexp)(MP, NAM, EXFLG, CRED) 455#define VFS_EXTATTRCTL(MP, C, FN, NS, N, P) \ 456 (*(MP)->mnt_op->vfs_extattrctl)(MP, C, FN, NS, N, P) 457 458#include <sys/module.h> 459 460#define VFS_SET(vfsops, fsname, flags) \ 461 static struct vfsconf fsname ## _vfsconf = { \ 462 &vfsops, \ 463 #fsname, \ 464 -1, \ 465 0, \ 466 flags \ 467 }; \ 468 static moduledata_t fsname ## _mod = { \ 469 #fsname, \ 470 vfs_modevent, \ 471 & fsname ## _vfsconf \ 472 }; \ 473 DECLARE_MODULE(fsname, fsname ## _mod, SI_SUB_VFS, SI_ORDER_MIDDLE) 474 475extern char *mountrootfsname; 476 477/* 478 * exported vnode operations 479 */ 480int dounmount(struct mount *, int, struct thread *); 481int kernel_mount(struct iovec *, u_int, int); 482int kernel_vmount(int flags, ...); 483int vfs_getopt(struct vfsoptlist *, const char *, void **, int *); 484int vfs_copyopt(struct vfsoptlist *, const char *, void *, int); 485int vfs_mount(struct thread *, const char *, char *, int, void *); 486int vfs_nmount(struct thread *, int, struct uio *); 487int vfs_setpublicfs /* set publicly exported fs */ 488 (struct mount *, struct netexport *, struct export_args *); 489int vfs_lock(struct mount *); /* lock a vfs */ 490void vfs_msync(struct mount *, int); 491void vfs_unlock(struct mount *); /* unlock a vfs */ 492int vfs_busy(struct mount *, int, struct mtx *, struct thread *); 493int vfs_export /* process mount export info */ 494 (struct mount *, struct export_args *); 495struct netcred *vfs_export_lookup /* lookup host in fs export list */ 496 (struct mount *, struct sockaddr *); 497int vfs_allocate_syncvnode(struct mount *); 498void vfs_getnewfsid(struct mount *); 499struct cdev *vfs_getrootfsid(struct mount *); 500struct mount *vfs_getvfs(fsid_t *); /* return vfs given fsid */ 501int vfs_modevent(module_t, int, void *); 502int vfs_mountedon(struct vnode *); /* is a vfs mounted on vp */ 503void vfs_mountroot(void); /* mount our root filesystem */ 504int vfs_rootmountalloc(char *, char *, struct mount **); 505void vfs_mount_destroy(struct mount *, struct thread *); 506void vfs_unbusy(struct mount *, struct thread *); 507void vfs_unmountall(void); 508int vfs_register(struct vfsconf *); 509int vfs_unregister(struct vfsconf *); 510extern TAILQ_HEAD(mntlist, mount) mountlist; /* mounted filesystem list */ 511extern struct mtx mountlist_mtx; 512extern struct nfs_public nfs_pub; 513 514/* 515 * Declarations for these vfs default operations are located in 516 * kern/vfs_default.c, they should be used instead of making "dummy" 517 * functions or casting entries in the VFS op table to "enopnotsupp()". 518 */ 519vfs_start_t vfs_stdstart; 520vfs_root_t vfs_stdroot; 521vfs_quotactl_t vfs_stdquotactl; 522vfs_statfs_t vfs_stdstatfs; 523vfs_sync_t vfs_stdsync; 524vfs_sync_t vfs_stdnosync; 525vfs_vget_t vfs_stdvget; 526vfs_fhtovp_t vfs_stdfhtovp; 527vfs_checkexp_t vfs_stdcheckexp; 528vfs_vptofh_t vfs_stdvptofh; 529vfs_init_t vfs_stdinit; 530vfs_uninit_t vfs_stduninit; 531vfs_extattrctl_t vfs_stdextattrctl; 532 533/* XXX - these should be indirect functions!!! */ 534int softdep_fsync(struct vnode *); 535int softdep_process_worklist(struct mount *); 536 537#else /* !_KERNEL */ 538 539#include <sys/cdefs.h> 540 541struct stat; 542 543__BEGIN_DECLS 544int fhopen(const struct fhandle *, int); 545int fhstat(const struct fhandle *, struct stat *); 546int fhstatfs(const struct fhandle *, struct statfs *); 547int fstatfs(int, struct statfs *); 548int getfh(const char *, fhandle_t *); 549int getfsstat(struct statfs *, long, int); 550int getmntinfo(struct statfs **, int); 551int lgetfh(const char *, fhandle_t *); 552int mount(const char *, const char *, int, void *); 553int nmount(struct iovec *, unsigned int, int); 554int statfs(const char *, struct statfs *); 555int unmount(const char *, int); 556 557/* C library stuff */ 558int getvfsbyname(const char *, struct xvfsconf *); 559__END_DECLS 560 561#endif /* _KERNEL */ 562 563#endif /* !_SYS_MOUNT_H_ */ 564