mount.h revision 133132
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 133132 2004-08-04 18:57:41Z maxim $ 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 void * 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 168struct vnode *__mnt_vnode_next(struct vnode **nvp, struct mount *mp); 169 170#define MNT_VNODE_FOREACH(vp, mp, vp2) \ 171 for ((vp2) = TAILQ_FIRST(&(mp)->mnt_nvnodelist); \ 172 (vp = __mnt_vnode_next(&(vp2), (mp))) != NULL;) 173 174 175#define MNT_ILOCK(mp) mtx_lock(&(mp)->mnt_mtx) 176#define MNT_IUNLOCK(mp) mtx_unlock(&(mp)->mnt_mtx) 177 178#endif /* _KERNEL */ 179 180/* 181 * User specifiable flags. 182 */ 183#define MNT_RDONLY 0x00000001 /* read only filesystem */ 184#define MNT_SYNCHRONOUS 0x00000002 /* filesystem written synchronously */ 185#define MNT_NOEXEC 0x00000004 /* can't exec from filesystem */ 186#define MNT_NOSUID 0x00000008 /* don't honor setuid bits on fs */ 187#define MNT_NODEV 0x00000010 /* don't interpret special files */ 188#define MNT_UNION 0x00000020 /* union with underlying filesystem */ 189#define MNT_ASYNC 0x00000040 /* filesystem written asynchronously */ 190#define MNT_SUIDDIR 0x00100000 /* special handling of SUID on dirs */ 191#define MNT_SOFTDEP 0x00200000 /* soft updates being done */ 192#define MNT_NOSYMFOLLOW 0x00400000 /* do not follow symlinks */ 193#define MNT_JAILDEVFS 0x02000000 /* jail-friendly DEVFS behaviour */ 194#define MNT_MULTILABEL 0x04000000 /* MAC support for individual objects */ 195#define MNT_ACLS 0x08000000 /* ACL support enabled */ 196#define MNT_NOATIME 0x10000000 /* disable update of file access time */ 197#define MNT_NOCLUSTERR 0x40000000 /* disable cluster read */ 198#define MNT_NOCLUSTERW 0x80000000 /* disable cluster write */ 199 200/* 201 * NFS export related mount flags. 202 */ 203#define MNT_EXRDONLY 0x00000080 /* exported read only */ 204#define MNT_EXPORTED 0x00000100 /* filesystem is exported */ 205#define MNT_DEFEXPORTED 0x00000200 /* exported to the world */ 206#define MNT_EXPORTANON 0x00000400 /* use anon uid mapping for everyone */ 207#define MNT_EXKERB 0x00000800 /* exported with Kerberos uid mapping */ 208#define MNT_EXPUBLIC 0x20000000 /* public export (WebNFS) */ 209 210/* 211 * Flags set by internal operations, 212 * but visible to the user. 213 * XXX some of these are not quite right.. (I've never seen the root flag set) 214 */ 215#define MNT_LOCAL 0x00001000 /* filesystem is stored locally */ 216#define MNT_QUOTA 0x00002000 /* quotas are enabled on filesystem */ 217#define MNT_ROOTFS 0x00004000 /* identifies the root filesystem */ 218#define MNT_USER 0x00008000 /* mounted by a user */ 219#define MNT_IGNORE 0x00800000 /* do not show entry in df */ 220 221/* 222 * Mask of flags that are visible to statfs(). 223 * XXX I think that this could now become (~(MNT_CMDFLAGS)) 224 * but the 'mount' program may need changing to handle this. 225 */ 226#define MNT_VISFLAGMASK (MNT_RDONLY | MNT_SYNCHRONOUS | MNT_NOEXEC | \ 227 MNT_NOSUID | MNT_NODEV | MNT_UNION | \ 228 MNT_ASYNC | MNT_EXRDONLY | MNT_EXPORTED | \ 229 MNT_DEFEXPORTED | MNT_EXPORTANON| MNT_EXKERB | \ 230 MNT_LOCAL | MNT_USER | MNT_QUOTA | \ 231 MNT_ROOTFS | MNT_NOATIME | MNT_NOCLUSTERR| \ 232 MNT_NOCLUSTERW | MNT_SUIDDIR | MNT_SOFTDEP | \ 233 MNT_IGNORE | MNT_EXPUBLIC | MNT_NOSYMFOLLOW | \ 234 MNT_JAILDEVFS | MNT_MULTILABEL | MNT_ACLS) 235 236/* Mask of flags that can be updated. */ 237#define MNT_UPDATEMASK (MNT_NOSUID | MNT_NOEXEC | MNT_NODEV | \ 238 MNT_SYNCHRONOUS | MNT_UNION | MNT_ASYNC | \ 239 MNT_NOATIME | \ 240 MNT_NOSYMFOLLOW | MNT_IGNORE | MNT_JAILDEVFS | \ 241 MNT_NOCLUSTERR | MNT_NOCLUSTERW | MNT_SUIDDIR | \ 242 MNT_ACLS | MNT_USER) 243 244/* 245 * External filesystem command modifier flags. 246 * Unmount can use the MNT_FORCE flag. 247 * XXX These are not STATES and really should be somewhere else. 248 */ 249#define MNT_UPDATE 0x00010000 /* not a real mount, just an update */ 250#define MNT_DELEXPORT 0x00020000 /* delete export host lists */ 251#define MNT_RELOAD 0x00040000 /* reload filesystem data */ 252#define MNT_FORCE 0x00080000 /* force unmount or readonly change */ 253#define MNT_SNAPSHOT 0x01000000 /* snapshot the filesystem */ 254#define MNT_BYFSID 0x08000000 /* specify filesystem by ID. */ 255#define MNT_CMDFLAGS (MNT_UPDATE | MNT_DELEXPORT | MNT_RELOAD | \ 256 MNT_FORCE | MNT_SNAPSHOT | MNT_BYFSID) 257/* 258 * Internal filesystem control flags stored in mnt_kern_flag. 259 * 260 * MNTK_UNMOUNT locks the mount entry so that name lookup cannot proceed 261 * past the mount point. This keeps the subtree stable during mounts 262 * and unmounts. 263 * 264 * MNTK_UNMOUNTF permits filesystems to detect a forced unmount while 265 * dounmount() is still waiting to lock the mountpoint. This allows 266 * the filesystem to cancel operations that might otherwise deadlock 267 * with the unmount attempt (used by NFS). 268 */ 269#define MNTK_UNMOUNTF 0x00000001 /* forced unmount in progress */ 270#define MNTK_UNMOUNT 0x01000000 /* unmount in progress */ 271#define MNTK_MWAIT 0x02000000 /* waiting for unmount to finish */ 272#define MNTK_WANTRDWR 0x04000000 /* upgrade to read/write requested */ 273#define MNTK_SUSPEND 0x08000000 /* request write suspension */ 274#define MNTK_SUSPENDED 0x10000000 /* write operations are suspended */ 275 276/* 277 * Sysctl CTL_VFS definitions. 278 * 279 * Second level identifier specifies which filesystem. Second level 280 * identifier VFS_VFSCONF returns information about all filesystems. 281 * Second level identifier VFS_GENERIC is non-terminal. 282 */ 283#define VFS_VFSCONF 0 /* get configured filesystems */ 284#define VFS_GENERIC 0 /* generic filesystem information */ 285/* 286 * Third level identifiers for VFS_GENERIC are given below; third 287 * level identifiers for specific filesystems are given in their 288 * mount specific header files. 289 */ 290#define VFS_MAXTYPENUM 1 /* int: highest defined filesystem type */ 291#define VFS_CONF 2 /* struct: vfsconf for filesystem given 292 as next argument */ 293 294/* 295 * Flags for various system call interfaces. 296 * 297 * waitfor flags to vfs_sync() and getfsstat() 298 */ 299#define MNT_WAIT 1 /* synchronously wait for I/O to complete */ 300#define MNT_NOWAIT 2 /* start all I/O, but do not wait for it */ 301#define MNT_LAZY 3 /* push data not written by filesystem syncer */ 302 303/* 304 * Generic file handle 305 */ 306struct fhandle { 307 fsid_t fh_fsid; /* Filesystem id of mount point */ 308 struct fid fh_fid; /* Filesys specific id */ 309}; 310typedef struct fhandle fhandle_t; 311 312/* 313 * Export arguments for local filesystem mount calls. 314 */ 315struct export_args { 316 int ex_flags; /* export related flags */ 317 uid_t ex_root; /* mapping for root uid */ 318 struct xucred ex_anon; /* mapping for anonymous user */ 319 struct sockaddr *ex_addr; /* net address to which exported */ 320 u_char ex_addrlen; /* and the net address length */ 321 struct sockaddr *ex_mask; /* mask of valid bits in saddr */ 322 u_char ex_masklen; /* and the smask length */ 323 char *ex_indexfile; /* index file for WebNFS URLs */ 324}; 325 326/* 327 * Structure holding information for a publicly exported filesystem 328 * (WebNFS). Currently the specs allow just for one such filesystem. 329 */ 330struct nfs_public { 331 int np_valid; /* Do we hold valid information */ 332 fhandle_t np_handle; /* Filehandle for pub fs (internal) */ 333 struct mount *np_mount; /* Mountpoint of exported fs */ 334 char *np_index; /* Index file */ 335}; 336 337/* 338 * Filesystem configuration information. One of these exists for each 339 * type of filesystem supported by the kernel. These are searched at 340 * mount time to identify the requested filesystem. 341 * 342 * XXX: Never change the first two arguments! 343 */ 344struct vfsconf { 345 u_int vfc_version; /* ABI version number */ 346 char vfc_name[MFSNAMELEN]; /* filesystem type name */ 347 struct vfsops *vfc_vfsops; /* filesystem operations vector */ 348 int vfc_typenum; /* historic filesystem type number */ 349 int vfc_refcount; /* number mounted of this type */ 350 int vfc_flags; /* permanent flags */ 351 struct vfsoptdecl *vfc_opts; /* mount options */ 352 TAILQ_ENTRY(vfsconf) vfc_list; /* list of vfscons */ 353}; 354 355/* Userland version of the struct vfsconf. */ 356struct xvfsconf { 357 struct vfsops *vfc_vfsops; /* filesystem operations vector */ 358 char vfc_name[MFSNAMELEN]; /* filesystem type name */ 359 int vfc_typenum; /* historic filesystem type number */ 360 int vfc_refcount; /* number mounted of this type */ 361 int vfc_flags; /* permanent flags */ 362 struct vfsconf *vfc_next; /* next in list */ 363}; 364 365#ifndef BURN_BRIDGES 366struct ovfsconf { 367 void *vfc_vfsops; 368 char vfc_name[32]; 369 int vfc_index; 370 int vfc_refcount; 371 int vfc_flags; 372}; 373#endif 374 375/* 376 * NB: these flags refer to IMPLEMENTATION properties, not properties of 377 * any actual mounts; i.e., it does not make sense to change the flags. 378 */ 379#define VFCF_STATIC 0x00010000 /* statically compiled into kernel */ 380#define VFCF_NETWORK 0x00020000 /* may get data over the network */ 381#define VFCF_READONLY 0x00040000 /* writes are not implemented */ 382#define VFCF_SYNTHETIC 0x00080000 /* data does not represent real files */ 383#define VFCF_LOOPBACK 0x00100000 /* aliases some other mounted FS */ 384#define VFCF_UNICODE 0x00200000 /* stores file names as Unicode*/ 385 386typedef uint32_t fsctlop_t; 387 388struct vfsidctl { 389 int vc_vers; /* should be VFSIDCTL_VERS1 (below) */ 390 fsid_t vc_fsid; /* fsid to operate on. */ 391 char vc_fstypename[MFSNAMELEN]; 392 /* type of fs 'nfs' or '*' */ 393 fsctlop_t vc_op; /* operation VFS_CTL_* (below) */ 394 void *vc_ptr; /* pointer to data structure. */ 395 size_t vc_len; /* sizeof said structure. */ 396 u_int32_t vc_spare[12]; /* spare (must be zero). */ 397}; 398 399/* vfsidctl API version. */ 400#define VFS_CTL_VERS1 0x01 401 402/* 403 * New style VFS sysctls, do not reuse/conflict with the namespace for 404 * private sysctls. 405 * All "global" sysctl ops have the 33rd bit set: 406 * 0x...1.... 407 * Private sysctl ops should have the 33rd bit unset. 408 */ 409#define VFS_CTL_QUERY 0x00010001 /* anything wrong? (vfsquery) */ 410#define VFS_CTL_TIMEO 0x00010002 /* set timeout for vfs notification */ 411#define VFS_CTL_NOLOCKS 0x00010003 /* disable file locking */ 412 413struct vfsquery { 414 u_int32_t vq_flags; 415 u_int32_t vq_spare[31]; 416}; 417 418/* vfsquery flags */ 419#define VQ_NOTRESP 0x0001 /* server down */ 420#define VQ_NEEDAUTH 0x0002 /* server bad auth */ 421#define VQ_LOWDISK 0x0004 /* we're low on space */ 422#define VQ_MOUNT 0x0008 /* new filesystem arrived */ 423#define VQ_UNMOUNT 0x0010 /* filesystem has left */ 424#define VQ_DEAD 0x0020 /* filesystem is dead, needs force unmount */ 425#define VQ_ASSIST 0x0040 /* filesystem needs assistance from external 426 program */ 427#define VQ_NOTRESPLOCK 0x0080 /* server lockd down */ 428#define VQ_FLAG0100 0x0100 /* placeholder */ 429#define VQ_FLAG0200 0x0200 /* placeholder */ 430#define VQ_FLAG0400 0x0400 /* placeholder */ 431#define VQ_FLAG0800 0x0800 /* placeholder */ 432#define VQ_FLAG1000 0x1000 /* placeholder */ 433#define VQ_FLAG2000 0x2000 /* placeholder */ 434#define VQ_FLAG4000 0x4000 /* placeholder */ 435#define VQ_FLAG8000 0x8000 /* placeholder */ 436 437#ifdef _KERNEL 438/* Point a sysctl request at a vfsidctl's data. */ 439#define VCTLTOREQ(vc, req) \ 440 do { \ 441 (req)->newptr = (vc)->vc_ptr; \ 442 (req)->newlen = (vc)->vc_len; \ 443 (req)->newidx = 0; \ 444 } while (0) 445#endif 446 447struct iovec; 448struct uio; 449 450#ifdef _KERNEL 451 452#ifdef MALLOC_DECLARE 453MALLOC_DECLARE(M_MOUNT); 454#endif 455extern int maxvfsconf; /* highest defined filesystem type */ 456extern int nfs_mount_type; /* vfc_typenum for nfs, or -1 */ 457 458TAILQ_HEAD(vfsconfhead, vfsconf); 459extern struct vfsconfhead vfsconf; 460 461/* 462 * Operations supported on mounted filesystem. 463 */ 464struct mount_args; 465struct nameidata; 466struct sysctl_req; 467 468typedef int vfs_omount_t(struct mount *mp, char *path, caddr_t data, 469 struct thread *td); 470typedef int vfs_start_t(struct mount *mp, int flags, struct thread *td); 471typedef int vfs_unmount_t(struct mount *mp, int mntflags, struct thread *td); 472typedef int vfs_root_t(struct mount *mp, struct vnode **vpp, struct thread *td); 473typedef int vfs_quotactl_t(struct mount *mp, int cmds, uid_t uid, 474 caddr_t arg, struct thread *td); 475typedef int vfs_statfs_t(struct mount *mp, struct statfs *sbp, 476 struct thread *td); 477typedef int vfs_sync_t(struct mount *mp, int waitfor, struct ucred *cred, 478 struct thread *td); 479typedef int vfs_vget_t(struct mount *mp, ino_t ino, int flags, 480 struct vnode **vpp); 481typedef int vfs_fhtovp_t(struct mount *mp, struct fid *fhp, struct vnode **vpp); 482typedef int vfs_checkexp_t(struct mount *mp, struct sockaddr *nam, 483 int *extflagsp, struct ucred **credanonp); 484typedef int vfs_vptofh_t(struct vnode *vp, struct fid *fhp); 485typedef int vfs_init_t(struct vfsconf *); 486typedef int vfs_uninit_t(struct vfsconf *); 487typedef int vfs_extattrctl_t(struct mount *mp, int cmd, 488 struct vnode *filename_vp, int attrnamespace, 489 const char *attrname, struct thread *td); 490typedef int vfs_mount_t(struct mount *mp, struct thread *td); 491typedef int vfs_sysctl_t(struct mount *mp, fsctlop_t op, 492 struct sysctl_req *req); 493 494struct vfsops { 495 vfs_mount_t *vfs_mount; 496 vfs_omount_t *vfs_omount; 497 vfs_start_t *vfs_start; 498 vfs_unmount_t *vfs_unmount; 499 vfs_root_t *vfs_root; 500 vfs_quotactl_t *vfs_quotactl; 501 vfs_statfs_t *vfs_statfs; 502 vfs_sync_t *vfs_sync; 503 vfs_vget_t *vfs_vget; 504 vfs_fhtovp_t *vfs_fhtovp; 505 vfs_checkexp_t *vfs_checkexp; 506 vfs_vptofh_t *vfs_vptofh; 507 vfs_init_t *vfs_init; 508 vfs_uninit_t *vfs_uninit; 509 vfs_extattrctl_t *vfs_extattrctl; 510 /* Additions below are not binary compatible with 5.0 and below. */ 511 vfs_sysctl_t *vfs_sysctl; 512}; 513 514#define VFS_MOUNT(MP, P) (*(MP)->mnt_op->vfs_mount)(MP, P) 515#define VFS_OMOUNT(MP, PATH, DATA, P) \ 516 (*(MP)->mnt_op->vfs_omount)(MP, PATH, DATA, P) 517#define VFS_START(MP, FLAGS, P) (*(MP)->mnt_op->vfs_start)(MP, FLAGS, P) 518#define VFS_UNMOUNT(MP, FORCE, P) (*(MP)->mnt_op->vfs_unmount)(MP, FORCE, P) 519#define VFS_ROOT(MP, VPP, P) (*(MP)->mnt_op->vfs_root)(MP, VPP, P) 520#define VFS_QUOTACTL(MP,C,U,A,P) (*(MP)->mnt_op->vfs_quotactl)(MP, C, U, A, P) 521#define VFS_STATFS(MP, SBP, P) (*(MP)->mnt_op->vfs_statfs)(MP, SBP, P) 522#define VFS_SYNC(MP, WAIT, C, P) (*(MP)->mnt_op->vfs_sync)(MP, WAIT, C, P) 523#define VFS_VGET(MP, INO, FLAGS, VPP) \ 524 (*(MP)->mnt_op->vfs_vget)(MP, INO, FLAGS, VPP) 525#define VFS_FHTOVP(MP, FIDP, VPP) \ 526 (*(MP)->mnt_op->vfs_fhtovp)(MP, FIDP, VPP) 527#define VFS_VPTOFH(VP, FIDP) (*(VP)->v_mount->mnt_op->vfs_vptofh)(VP, FIDP) 528#define VFS_CHECKEXP(MP, NAM, EXFLG, CRED) \ 529 (*(MP)->mnt_op->vfs_checkexp)(MP, NAM, EXFLG, CRED) 530#define VFS_EXTATTRCTL(MP, C, FN, NS, N, P) \ 531 (*(MP)->mnt_op->vfs_extattrctl)(MP, C, FN, NS, N, P) 532#define VFS_SYSCTL(MP, OP, REQ) \ 533 (*(MP)->mnt_op->vfs_sysctl)(MP, OP, REQ) 534 535#include <sys/module.h> 536 537/* 538 * Version numbers. 539 */ 540#define VFS_VERSION_00 0x19660120 541#define VFS_VERSION VFS_VERSION_00 542 543#define VFS_SET(vfsops, fsname, flags) \ 544 static struct vfsconf fsname ## _vfsconf = { \ 545 .vfc_version = VFS_VERSION, \ 546 .vfc_name = #fsname, \ 547 .vfc_vfsops = &vfsops, \ 548 .vfc_typenum = -1, \ 549 .vfc_flags = flags, \ 550 }; \ 551 static moduledata_t fsname ## _mod = { \ 552 #fsname, \ 553 vfs_modevent, \ 554 & fsname ## _vfsconf \ 555 }; \ 556 DECLARE_MODULE(fsname, fsname ## _mod, SI_SUB_VFS, SI_ORDER_MIDDLE) 557 558extern char *mountrootfsname; 559 560/* 561 * exported vnode operations 562 */ 563int dounmount(struct mount *, int, struct thread *); 564int kernel_mount(struct iovec *, u_int, int); 565int kernel_vmount(int flags, ...); 566struct vfsconf *vfs_byname(const char *); 567void vfs_event_signal(fsid_t *, u_int32_t, intptr_t); 568int vfs_getopt(struct vfsoptlist *, const char *, void **, int *); 569int vfs_copyopt(struct vfsoptlist *, const char *, void *, int); 570int vfs_mount(struct thread *, const char *, char *, int, void *); 571int vfs_setpublicfs /* set publicly exported fs */ 572 (struct mount *, struct netexport *, struct export_args *); 573int vfs_lock(struct mount *); /* lock a vfs */ 574void vfs_msync(struct mount *, int); 575void vfs_unlock(struct mount *); /* unlock a vfs */ 576int vfs_busy(struct mount *, int, struct mtx *, struct thread *); 577int vfs_export /* process mount export info */ 578 (struct mount *, struct export_args *); 579struct netcred *vfs_export_lookup /* lookup host in fs export list */ 580 (struct mount *, struct sockaddr *); 581int vfs_allocate_syncvnode(struct mount *); 582void vfs_getnewfsid(struct mount *); 583struct cdev *vfs_getrootfsid(struct mount *); 584struct mount *vfs_getvfs(fsid_t *); /* return vfs given fsid */ 585int vfs_modevent(module_t, int, void *); 586int vfs_mountedon(struct vnode *); /* is a vfs mounted on vp */ 587void vfs_mountroot(void); /* mount our root filesystem */ 588int vfs_rootmountalloc(char *, char *, struct mount **); 589void vfs_mount_destroy(struct mount *, struct thread *); 590int vfs_suser(struct mount *, struct thread *); 591void vfs_unbusy(struct mount *, struct thread *); 592void vfs_unmountall(void); 593int vfs_register(struct vfsconf *); 594int vfs_unregister(struct vfsconf *); 595extern TAILQ_HEAD(mntlist, mount) mountlist; /* mounted filesystem list */ 596extern struct mtx mountlist_mtx; 597extern struct nfs_public nfs_pub; 598 599/* 600 * Declarations for these vfs default operations are located in 601 * kern/vfs_default.c, they should be used instead of making "dummy" 602 * functions or casting entries in the VFS op table to "enopnotsupp()". 603 */ 604vfs_start_t vfs_stdstart; 605vfs_root_t vfs_stdroot; 606vfs_quotactl_t vfs_stdquotactl; 607vfs_statfs_t vfs_stdstatfs; 608vfs_sync_t vfs_stdsync; 609vfs_sync_t vfs_stdnosync; 610vfs_vget_t vfs_stdvget; 611vfs_fhtovp_t vfs_stdfhtovp; 612vfs_checkexp_t vfs_stdcheckexp; 613vfs_vptofh_t vfs_stdvptofh; 614vfs_init_t vfs_stdinit; 615vfs_uninit_t vfs_stduninit; 616vfs_extattrctl_t vfs_stdextattrctl; 617vfs_sysctl_t vfs_stdsysctl; 618 619/* XXX - these should be indirect functions!!! */ 620int softdep_fsync(struct vnode *); 621int softdep_process_worklist(struct mount *); 622 623#else /* !_KERNEL */ 624 625#include <sys/cdefs.h> 626 627struct stat; 628 629__BEGIN_DECLS 630int fhopen(const struct fhandle *, int); 631int fhstat(const struct fhandle *, struct stat *); 632int fhstatfs(const struct fhandle *, struct statfs *); 633int fstatfs(int, struct statfs *); 634int getfh(const char *, fhandle_t *); 635int getfsstat(struct statfs *, long, int); 636int getmntinfo(struct statfs **, int); 637int lgetfh(const char *, fhandle_t *); 638int mount(const char *, const char *, int, void *); 639int nmount(struct iovec *, unsigned int, int); 640int statfs(const char *, struct statfs *); 641int unmount(const char *, int); 642 643/* C library stuff */ 644int getvfsbyname(const char *, struct xvfsconf *); 645__END_DECLS 646 647#endif /* _KERNEL */ 648 649#endif /* !_SYS_MOUNT_H_ */ 650