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: src/sys/sys/mount.h,v 1.89.2.7 2003/04/04 20:35:57 tegge Exp $ 35 * $DragonFly: src/sys/sys/mount.h,v 1.47 2008/09/17 21:44:19 dillon Exp $ 36 */ 37 38 #ifndef _SYS_MOUNT_H_ 39 #define _SYS_MOUNT_H_ 40 41 #include <sys/ucred.h> 42 43 #ifndef _KERNEL 44 #if !defined(_POSIX_C_SOURCE) && !defined(_XOPEN_SOURCE) 45 #include <sys/stat.h> 46 #endif /* !_POSIX_C_SOURCE */ 47 #endif /* !_KERNEL */ 48 49 #if defined(_KERNEL) || defined(_KERNEL_STRUCTURES) 50 #ifndef _SYS_QUEUE_H_ 51 #include <sys/queue.h> 52 #endif 53 #ifndef _SYS_LOCK_H_ 54 #include <sys/lock.h> 55 #endif 56 #ifndef _SYS_NAMECACHE_H_ 57 #include <sys/namecache.h> 58 #endif 59 #ifndef _SYS_STATVFS_H_ 60 #include <sys/statvfs.h> 61 #endif 62 #ifndef _SYS_THREAD_H_ 63 #include <sys/thread.h> 64 #endif 65 #endif 66 67 struct thread; 68 struct journal; 69 struct vop_ops; 70 struct vop_mountctl_args; 71 struct statvfs; 72 73 typedef struct fsid { int32_t val[2]; } fsid_t; /* file system id type */ 74 75 /* 76 * File identifier. These are unique per filesystem on a single machine. 77 * 78 * fix_ext is also used by HAMMER. 79 */ 80 #define MAXFIDSZ 16 81 82 struct fid { 83 u_short fid_len; /* length of data in bytes */ 84 u_short fid_ext; /* extended data */ 85 char fid_data[MAXFIDSZ]; /* data (variable length) */ 86 }; 87 88 /* 89 * file system statistics 90 */ 91 92 #define MFSNAMELEN 16 /* length of fs type name, including null */ 93 #define MNAMELEN 80 /* length of buffer for returned name */ 94 95 struct statfs { 96 long f_spare2; /* placeholder */ 97 long f_bsize; /* fundamental file system block size */ 98 long f_iosize; /* optimal transfer block size */ 99 long f_blocks; /* total data blocks in file system */ 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 file system */ 103 long f_ffree; /* free file nodes in fs */ 104 fsid_t f_fsid; /* file system 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[MFSNAMELEN]; /* fs type name */ 111 char f_mntonname[MNAMELEN]; /* 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[MNAMELEN];/* mounted filesystem */ 116 short f_spares2; /* unused spare */ 117 long f_spare[2]; /* unused spare */ 118 }; 119 120 #if defined(_KERNEL) || defined(_KERNEL_STRUCTURES) 121 122 /* 123 * bio_ops are associated with the mount structure and used in conjuction 124 * with the b_dep field in a buffer. Currently softupdates and HAMMER 125 * utilize this field. 126 */ 127 struct buf; 128 129 struct bio_ops { 130 TAILQ_ENTRY(bio_ops) entry; 131 void (*io_start) (struct buf *); 132 void (*io_complete) (struct buf *); 133 void (*io_deallocate) (struct buf *); 134 int (*io_fsync) (struct vnode *); 135 int (*io_sync) (struct mount *); 136 void (*io_movedeps) (struct buf *, struct buf *); 137 int (*io_countdeps) (struct buf *, int); 138 int (*io_checkread) (struct buf *); 139 int (*io_checkwrite) (struct buf *); 140 }; 141 142 /* 143 * Structure per mounted file system. Each mounted file system has an 144 * array of operations and an instance record. The file systems are 145 * put on a doubly linked list. 146 * 147 * NOTE: mnt_nvnodelist and mnt_reservedvnlist. At the moment vnodes 148 * are linked into mnt_nvnodelist. At some point in the near future the 149 * vnode list will be split into a 'dirty' and 'clean' list. mnt_nvnodelist 150 * will become the dirty list and mnt_reservedvnlist will become the 'clean' 151 * list. Filesystem kld's syncing code should remain compatible since 152 * they only need to scan the dirty vnode list (nvnodelist -> dirtyvnodelist). 153 * 154 * NOTE: All VFSs must at least populate mnt_vn_ops or those VOP ops that 155 * only take namecache pointers will not be able to find their operations 156 * vector via namecache->nc_mount. 157 * 158 * MPSAFE NOTES: mnt_lock interlocks mounting and unmounting operations. 159 * 160 * mnt_token interlocks operations which adjust the mount 161 * structure and will also be held through VFS operations 162 * for VFSes not flagged MPSAFE. 163 */ 164 TAILQ_HEAD(vnodelst, vnode); 165 TAILQ_HEAD(journallst, journal); 166 167 struct mount { 168 TAILQ_ENTRY(mount) mnt_list; /* mount list */ 169 struct vfsops *mnt_op; /* operations on fs */ 170 struct vfsconf *mnt_vfc; /* configuration info */ 171 long mnt_namecache_gen; /* ++ to clear negative hits */ 172 struct vnode *mnt_syncer; /* syncer vnode */ 173 struct vnodelst mnt_nvnodelist; /* list of vnodes this mount */ 174 struct lock mnt_lock; /* mount structure lock */ 175 int mnt_flag; /* flags shared with user */ 176 int mnt_kern_flag; /* kernel only flags */ 177 int mnt_maxsymlinklen; /* max size of short symlink */ 178 struct statfs mnt_stat; /* cache of filesystem stats */ 179 struct statvfs mnt_vstat; /* extended stats */ 180 qaddr_t mnt_data; /* private data */ 181 time_t mnt_time; /* last time written*/ 182 u_int mnt_iosize_max; /* max IO request size */ 183 struct vnodelst mnt_reservedvnlist; /* (future) dirty vnode list */ 184 int mnt_nvnodelistsize; /* # of vnodes on this mount */ 185 186 /* 187 * ops vectors have a fixed stacking order. All primary calls run 188 * through mnt_vn_ops. This field is typically assigned to 189 * mnt_vn_norm_ops. If journaling has been enabled this field is 190 * usually assigned to mnt_vn_journal_ops. 191 */ 192 struct vop_ops *mnt_vn_use_ops; /* current ops set */ 193 194 struct vop_ops *mnt_vn_coherency_ops; /* cache coherency ops */ 195 struct vop_ops *mnt_vn_journal_ops; /* journaling ops */ 196 struct vop_ops *mnt_vn_norm_ops; /* for use by the VFS */ 197 struct vop_ops *mnt_vn_spec_ops; /* for use by the VFS */ 198 struct vop_ops *mnt_vn_fifo_ops; /* for use by the VFS */ 199 struct nchandle mnt_ncmountpt; /* mount point */ 200 struct nchandle mnt_ncmounton; /* mounted on */ 201 int mnt_refs; /* nchandle references */ 202 struct lwkt_token mnt_token; /* token lock if not MPSAFE */ 203 struct journallst mnt_jlist; /* list of active journals */ 204 u_int8_t *mnt_jbitmap; /* streamid bitmap */ 205 int16_t mnt_streamid; /* last streamid */ 206 207 struct bio_ops *mnt_bioops; /* BIO ops (hammer, softupd) */ 208 }; 209 210 #endif /* _KERNEL || _KERNEL_STRUCTURES */ 211 212 /* 213 * User specifiable flags. 214 */ 215 #define MNT_RDONLY 0x00000001 /* read only filesystem */ 216 #define MNT_SYNCHRONOUS 0x00000002 /* file system written synchronously */ 217 #define MNT_NOEXEC 0x00000004 /* can't exec from filesystem */ 218 #define MNT_NOSUID 0x00000008 /* don't honor setuid bits on fs */ 219 #define MNT_NODEV 0x00000010 /* don't interpret special files */ 220 #define MNT_UNION 0x00000020 /* union with underlying filesystem */ 221 #define MNT_ASYNC 0x00000040 /* file system written asynchronously */ 222 #define MNT_SUIDDIR 0x00100000 /* special handling of SUID on dirs */ 223 #define MNT_SOFTDEP 0x00200000 /* soft updates being done */ 224 #define MNT_NOSYMFOLLOW 0x00400000 /* do not follow symlinks */ 225 #define MNT_NOATIME 0x10000000 /* disable update of file access time */ 226 #define MNT_NOCLUSTERR 0x40000000 /* disable cluster read */ 227 #define MNT_NOCLUSTERW 0x80000000 /* disable cluster write */ 228 229 /* 230 * NFS export related mount flags. 231 */ 232 #define MNT_EXRDONLY 0x00000080 /* exported read only */ 233 #define MNT_EXPORTED 0x00000100 /* file system is exported */ 234 #define MNT_DEFEXPORTED 0x00000200 /* exported to the world */ 235 #define MNT_EXPORTANON 0x00000400 /* use anon uid mapping for everyone */ 236 #define MNT_EXKERB 0x00000800 /* exported with Kerberos uid mapping */ 237 #define MNT_EXPUBLIC 0x20000000 /* public export (WebNFS) */ 238 239 /* 240 * Flags set by internal operations, 241 * but visible to the user. 242 * XXX some of these are not quite right.. (I've never seen the root flag set) 243 */ 244 #define MNT_LOCAL 0x00001000 /* filesystem is stored locally */ 245 #define MNT_QUOTA 0x00002000 /* quotas are enabled on filesystem */ 246 #define MNT_ROOTFS 0x00004000 /* identifies the root filesystem */ 247 #define MNT_USER 0x00008000 /* mounted by a user */ 248 #define MNT_IGNORE 0x00800000 /* do not show entry in df */ 249 250 /* 251 * Mask of flags that are visible to statfs() 252 * XXX I think that this could now become (~(MNT_CMDFLAGS)) 253 * but the 'mount' program may need changing to handle this. 254 */ 255 #define MNT_VISFLAGMASK (MNT_RDONLY | MNT_SYNCHRONOUS | MNT_NOEXEC | \ 256 MNT_NOSUID | MNT_NODEV | MNT_UNION | \ 257 MNT_ASYNC | MNT_EXRDONLY | MNT_EXPORTED | \ 258 MNT_DEFEXPORTED | MNT_EXPORTANON| MNT_EXKERB | \ 259 MNT_LOCAL | MNT_USER | MNT_QUOTA | \ 260 MNT_ROOTFS | MNT_NOATIME | MNT_NOCLUSTERR| \ 261 MNT_NOCLUSTERW | MNT_SUIDDIR | MNT_SOFTDEP | \ 262 MNT_IGNORE | MNT_NOSYMFOLLOW | MNT_EXPUBLIC ) 263 /* 264 * External filesystem command modifier flags. 265 * Unmount can use the MNT_FORCE flag. 266 * XXX These are not STATES and really should be somewhere else. 267 */ 268 #define MNT_UPDATE 0x00010000 /* not a real mount, just an update */ 269 #define MNT_DELEXPORT 0x00020000 /* delete export host lists */ 270 #define MNT_RELOAD 0x00040000 /* reload filesystem data */ 271 #define MNT_FORCE 0x00080000 /* force unmount or readonly change */ 272 #define MNT_CMDFLAGS (MNT_UPDATE|MNT_DELEXPORT|MNT_RELOAD|MNT_FORCE) 273 /* 274 * Internal filesystem control flags stored in mnt_kern_flag. 275 * 276 * MNTK_UNMOUNT locks the mount entry so that name lookup cannot proceed 277 * past the mount point. This keeps the subtree stable during mounts 278 * and unmounts. 279 * 280 * MNTK_UNMOUNTF permits filesystems to detect a forced unmount while 281 * dounmount() is still waiting to lock the mountpoint. This allows 282 * the filesystem to cancel operations that might otherwise deadlock 283 * with the unmount attempt (used by NFS). 284 * 285 * MNTK_NOSTKMNT prevents mounting another filesystem inside the flagged one. 286 */ 287 #define MNTK_UNMOUNTF 0x00000001 /* forced unmount in progress */ 288 #define MNTK_MPSAFE 0x00010000 /* call vops without mnt_token lock */ 289 #define MNTK_RD_MPSAFE 0x00020000 /* vop_read is MPSAFE */ 290 #define MNTK_WR_MPSAFE 0x00040000 /* vop_write is MPSAFE */ 291 #define MNTK_GA_MPSAFE 0x00080000 /* vop_getattr is MPSAFE */ 292 #define MNTK_IN_MPSAFE 0x00100000 /* vop_inactive is MPSAFE */ 293 #define MNTK_SG_MPSAFE 0x00200000 /* vop_strategy is MPSAFE */ 294 #define MNTK_NCALIASED 0x00800000 /* namecached aliased */ 295 #define MNTK_UNMOUNT 0x01000000 /* unmount in progress */ 296 #define MNTK_MWAIT 0x02000000 /* waiting for unmount to finish */ 297 #define MNTK_WANTRDWR 0x04000000 /* upgrade to read/write requested */ 298 #define MNTK_FSMID 0x08000000 /* getattr supports FSMIDs */ 299 #define MNTK_NOSTKMNT 0x10000000 /* no stacked mount point allowed */ 300 #define MNTK_NOMSYNC 0x20000000 /* used by tmpfs */ 301 302 /* 303 * mountlist_*() defines 304 */ 305 #define MNTSCAN_FORWARD 0x0001 306 #define MNTSCAN_REVERSE 0x0002 307 #define MNTSCAN_NOBUSY 0x0004 308 309 #define MNTINS_FIRST 0x0001 310 #define MNTINS_LAST 0x0002 311 312 /* 313 * Sysctl CTL_VFS definitions. 314 * 315 * Second level identifier specifies which filesystem. Second level 316 * identifier VFS_VFSCONF returns information about all filesystems. 317 * Second level identifier VFS_GENERIC is non-terminal. 318 */ 319 #define VFS_VFSCONF 0 /* get configured filesystems */ 320 #define VFS_GENERIC 0 /* generic filesystem information */ 321 /* 322 * Third level identifiers for VFS_GENERIC are given below; third 323 * level identifiers for specific filesystems are given in their 324 * mount specific header files. 325 */ 326 #define VFS_MAXTYPENUM 1 /* int: highest defined filesystem type */ 327 #define VFS_CONF 2 /* struct: vfsconf for filesystem given 328 as next argument */ 329 330 /* 331 * VFS MPLOCK helper. 332 */ 333 #define VFS_MPLOCK_DECLARE int xlock_mpsafe 334 335 #define VFS_MPLOCK1(mp) VFS_MPLOCK_FLAG(mp, MNTK_MPSAFE) 336 337 #define VFS_MPLOCK2(mp) \ 338 do { \ 339 if (xlock_mpsafe) { \ 340 get_mplock(); /* TEMPORARY */ \ 341 lwkt_gettoken(&mp->mnt_token); \ 342 xlock_mpsafe = 0; \ 343 } \ 344 } while(0) 345 346 #define VFS_MPLOCK_FLAG(mp, flag) \ 347 do { \ 348 if (mp->mnt_kern_flag & flag) { \ 349 xlock_mpsafe = 1; \ 350 } else { \ 351 get_mplock(); /* TEMPORARY */ \ 352 lwkt_gettoken(&mp->mnt_token); \ 353 xlock_mpsafe = 0; \ 354 } \ 355 } while(0) 356 357 #define VFS_MPUNLOCK(mp) \ 358 do { \ 359 if (xlock_mpsafe == 0) { \ 360 lwkt_reltoken(&mp->mnt_token); \ 361 rel_mplock(); /* TEMPORARY */ \ 362 } \ 363 } while(0) 364 365 /* 366 * Flags for various system call interfaces. 367 * 368 * waitfor flags to vfs_sync() and getfsstat() 369 */ 370 #define MNT_WAIT 1 /* synchronously wait for I/O to complete */ 371 #define MNT_NOWAIT 2 /* start all I/O, but do not wait for it */ 372 #define MNT_LAZY 4 /* be lazy and do not necessarily push it all */ 373 374 #define VOP_FSYNC_SYSCALL 0x0001 /* from system call */ 375 376 /* 377 * Generic file handle 378 */ 379 struct fhandle { 380 fsid_t fh_fsid; /* File system id of mount point */ 381 struct fid fh_fid; /* File sys specific id */ 382 }; 383 typedef struct fhandle fhandle_t; 384 385 /* 386 * Export arguments for local filesystem mount calls. 387 */ 388 struct export_args { 389 int ex_flags; /* export related flags */ 390 uid_t ex_root; /* mapping for root uid */ 391 struct ucred ex_anon; /* mapping for anonymous user */ 392 struct sockaddr *ex_addr; /* net address to which exported */ 393 int ex_addrlen; /* and the net address length */ 394 struct sockaddr *ex_mask; /* mask of valid bits in saddr */ 395 int ex_masklen; /* and the smask length */ 396 char *ex_indexfile; /* index file for WebNFS URLs */ 397 }; 398 399 /* 400 * Structure holding information for a publicly exported filesystem 401 * (WebNFS). Currently the specs allow just for one such filesystem. 402 */ 403 struct nfs_public { 404 int np_valid; /* Do we hold valid information */ 405 fhandle_t np_handle; /* Filehandle for pub fs (internal) */ 406 struct mount *np_mount; /* Mountpoint of exported fs */ 407 char *np_index; /* Index file */ 408 }; 409 410 /* 411 * Filesystem configuration information. One of these exists for each 412 * type of filesystem supported by the kernel. These are searched at 413 * mount time to identify the requested filesystem. 414 */ 415 #ifndef _SYS_QUEUE_H_ 416 #include <sys/queue.h> 417 #endif 418 struct vfsconf { 419 struct vfsops *vfc_vfsops; /* filesystem operations vector */ 420 char vfc_name[MFSNAMELEN]; /* filesystem type name */ 421 int vfc_typenum; /* historic filesystem type number */ 422 int vfc_refcount; /* number mounted of this type */ 423 int vfc_flags; /* permanent flags */ 424 STAILQ_ENTRY(vfsconf) vfc_next; /* next in list */ 425 }; 426 427 struct ovfsconf { 428 void *vfc_vfsops; 429 char vfc_name[32]; 430 int vfc_index; 431 int vfc_refcount; 432 int vfc_flags; 433 }; 434 435 /* 436 * NB: these flags refer to IMPLEMENTATION properties, not properties of 437 * any actual mounts; i.e., it does not make sense to change the flags. 438 */ 439 #define VFCF_STATIC 0x00010000 /* statically compiled into kernel */ 440 #define VFCF_NETWORK 0x00020000 /* may get data over the network */ 441 #define VFCF_READONLY 0x00040000 /* writes are not implemented */ 442 #define VFCF_SYNTHETIC 0x00080000 /* data does not represent real files */ 443 #define VFCF_LOOPBACK 0x00100000 /* aliases some other mounted FS */ 444 #define VFCF_UNICODE 0x00200000 /* stores file names as Unicode*/ 445 446 #ifdef _KERNEL 447 448 #ifdef MALLOC_DECLARE 449 MALLOC_DECLARE(M_MOUNT); 450 #endif 451 extern int nfs_mount_type; /* vfc_typenum for nfs, or -1 */ 452 453 struct vfsconf *vfsconf_find_by_name(const char *); 454 struct vfsconf *vfsconf_find_by_typenum(int); 455 int vfsconf_get_maxtypenum(void); 456 int vfsconf_each(int (*)(struct vfsconf *, void *), void *); 457 458 #endif 459 460 #if defined(_KERNEL) || defined(_KERNEL_STRUCTURES) 461 462 TAILQ_HEAD(mntlist, mount); /* struct mntlist */ 463 464 /* 465 * Operations supported on mounted file system. 466 */ 467 #ifdef __STDC__ 468 struct nlookupdata; 469 struct nlookupdata; 470 struct mbuf; 471 #endif 472 473 typedef int vfs_mount_t(struct mount *mp, char *path, caddr_t data, 474 struct ucred *cred); 475 typedef int vfs_start_t(struct mount *mp, int flags); 476 typedef int vfs_unmount_t(struct mount *mp, int mntflags); 477 typedef int vfs_root_t(struct mount *mp, struct vnode **vpp); 478 typedef int vfs_quotactl_t(struct mount *mp, int cmds, uid_t uid, caddr_t arg, 479 struct ucred *cred); 480 typedef int vfs_statfs_t(struct mount *mp, struct statfs *sbp, 481 struct ucred *cred); 482 typedef int vfs_statvfs_t(struct mount *mp, struct statvfs *sbp, 483 struct ucred *cred); 484 typedef int vfs_sync_t(struct mount *mp, int waitfor); 485 typedef int vfs_vget_t(struct mount *mp, struct vnode *dvp, 486 ino_t ino, struct vnode **vpp); 487 typedef int vfs_fhtovp_t(struct mount *mp, struct vnode *rootvp, 488 struct fid *fhp, struct vnode **vpp); 489 typedef int vfs_checkexp_t(struct mount *mp, struct sockaddr *nam, 490 int *extflagsp, struct ucred **credanonp); 491 typedef int vfs_vptofh_t(struct vnode *vp, struct fid *fhp); 492 typedef int vfs_init_t(struct vfsconf *); 493 typedef int vfs_uninit_t(struct vfsconf *); 494 typedef int vfs_extattrctl_t(struct mount *mp, int cmd, struct vnode *vp, 495 int attrnamespace, const char *attrname, 496 struct ucred *cred); 497 498 int vfs_mount(struct mount *mp, char *path, caddr_t data, struct ucred *cred); 499 int vfs_start(struct mount *mp, int flags); 500 int vfs_unmount(struct mount *mp, int mntflags); 501 int vfs_root(struct mount *mp, struct vnode **vpp); 502 int vfs_quotactl(struct mount *mp, int cmds, uid_t uid, caddr_t arg, 503 struct ucred *cred); 504 int vfs_statfs(struct mount *mp, struct statfs *sbp, struct ucred *cred); 505 int vfs_statvfs(struct mount *mp, struct statvfs *sbp, struct ucred *cred); 506 int vfs_sync(struct mount *mp, int waitfor); 507 int vfs_vget(struct mount *mp, struct vnode *dvp, 508 ino_t ino, struct vnode **vpp); 509 int vfs_fhtovp(struct mount *mp, struct vnode *rootvp, 510 struct fid *fhp, struct vnode **vpp); 511 int vfs_checkexp(struct mount *mp, struct sockaddr *nam, 512 int *extflagsp, struct ucred **credanonp); 513 int vfs_vptofh(struct vnode *vp, struct fid *fhp); 514 int vfs_init(struct vfsconf *vfc); 515 int vfs_uninit(struct vfsconf *vfc, struct vfsconf *vfsp); 516 int vfs_extattrctl(struct mount *mp, int cmd, struct vnode *vp, 517 int attrnamespace, const char *attrname, 518 struct ucred *cred); 519 520 521 struct vfsops { 522 vfs_mount_t *vfs_mount; 523 vfs_start_t *vfs_start; 524 vfs_unmount_t *vfs_unmount; 525 vfs_root_t *vfs_root; 526 vfs_quotactl_t *vfs_quotactl; 527 vfs_statfs_t *vfs_statfs; 528 vfs_sync_t *vfs_sync; 529 vfs_vget_t *vfs_vget; 530 vfs_fhtovp_t *vfs_fhtovp; 531 vfs_checkexp_t *vfs_checkexp; 532 vfs_vptofh_t *vfs_vptofh; 533 vfs_init_t *vfs_init; 534 vfs_uninit_t *vfs_uninit; 535 vfs_extattrctl_t *vfs_extattrctl; 536 vfs_statvfs_t *vfs_statvfs; 537 }; 538 539 #define VFS_MOUNT(MP, PATH, DATA, CRED) \ 540 vfs_mount(MP, PATH, DATA, CRED) 541 #define VFS_START(MP, FLAGS) \ 542 vfs_start(MP, FLAGS) 543 #define VFS_UNMOUNT(MP, FORCE) \ 544 vfs_unmount(MP, FORCE) 545 #define VFS_ROOT(MP, VPP) \ 546 vfs_root(MP, VPP) 547 #define VFS_QUOTACTL(MP, C, U, A, CRED) \ 548 vfs_quotactl(MP, C, U, A, CRED) 549 #define VFS_STATFS(MP, SBP, CRED) \ 550 vfs_statfs(MP, SBP, CRED) 551 #define VFS_STATVFS(MP, SBP, CRED) \ 552 vfs_statvfs(MP, SBP, CRED) 553 #define VFS_SYNC(MP, WAIT) \ 554 vfs_sync(MP, WAIT) 555 #define VFS_VGET(MP, DVP, INO, VPP) \ 556 vfs_vget(MP, DVP, INO, VPP) 557 #define VFS_FHTOVP(MP, ROOTVP, FIDP, VPP) \ 558 vfs_fhtovp(MP, ROOTVP, FIDP, VPP) 559 #define VFS_VPTOFH(VP, FIDP) \ 560 vfs_vptofh(VP, FIDP) 561 #define VFS_CHECKEXP(MP, NAM, EXFLG, CRED) \ 562 vfs_checkexp(MP, NAM, EXFLG, CRED) 563 #define VFS_EXTATTRCTL(MP, C, FVP, NS, N, CRED) \ 564 vfs_extattrctl(MP, C, FVP, NS, N, CRED) 565 566 #endif 567 568 #ifdef _KERNEL 569 570 #include <sys/module.h> 571 572 #define VFS_SET(vfsops, fsname, flags) \ 573 static struct vfsconf fsname ## _vfsconf = { \ 574 &vfsops, \ 575 #fsname, \ 576 -1, \ 577 0, \ 578 flags, \ 579 { NULL }, \ 580 }; \ 581 static moduledata_t fsname ## _mod = { \ 582 #fsname, \ 583 vfs_modevent, \ 584 & fsname ## _vfsconf \ 585 }; \ 586 DECLARE_MODULE(fsname, fsname ## _mod, SI_SUB_VFS, SI_ORDER_MIDDLE) 587 588 #endif 589 590 #if defined(_KERNEL) || defined(_KERNEL_STRUCTURES) 591 592 #include <net/radix.h> 593 594 #define AF_MAX 36 /* XXX */ 595 596 /* 597 * Network address lookup element 598 */ 599 struct netcred { 600 struct radix_node netc_rnodes[2]; 601 int netc_exflags; 602 struct ucred netc_anon; 603 }; 604 605 /* 606 * Network export information 607 */ 608 struct netexport { 609 struct netcred ne_defexported; /* Default export */ 610 struct radix_node_head *ne_rtable[AF_MAX+1]; /* Individual exports */ 611 }; 612 613 #endif 614 615 #ifdef _KERNEL 616 617 extern char *mountrootfsname; 618 619 /* 620 * exported vnode operations 621 */ 622 int dounmount (struct mount *, int); 623 int vfs_setpublicfs /* set publicly exported fs */ 624 (struct mount *, struct netexport *, const struct export_args *); 625 int vfs_lock (struct mount *); /* lock a vfs */ 626 void vfs_msync (struct mount *, int); 627 void vfs_unlock (struct mount *); /* unlock a vfs */ 628 int vfs_busy (struct mount *, int); 629 void vfs_bufstats(void); 630 int vfs_export /* process mount export info */ 631 (struct mount *, struct netexport *, const struct export_args *); 632 struct netcred *vfs_export_lookup /* lookup host in fs export list */ 633 (struct mount *, struct netexport *, struct sockaddr *); 634 int vfs_allocate_syncvnode (struct mount *); 635 void vfs_getnewfsid (struct mount *); 636 int vfs_setfsid(struct mount *mp, fsid_t *template); 637 cdev_t vfs_getrootfsid (struct mount *); 638 struct mount *vfs_getvfs (fsid_t *); /* return vfs given fsid */ 639 int vfs_modevent (module_t, int, void *); 640 int vfs_mountedon (struct vnode *); /* is a vfs mounted on vp */ 641 int vfs_rootmountalloc (char *, char *, struct mount **); 642 void vfs_unbusy (struct mount *); 643 void vfs_unmountall (void); 644 int vfs_register (struct vfsconf *); 645 int vfs_unregister (struct vfsconf *); 646 extern struct nfs_public nfs_pub; 647 648 /* 649 * Declarations for these vfs default operations are located in 650 * kern/vfs_default.c, they should be used instead of making "dummy" 651 * functions or casting entries in the VFS op table to "enopnotsupp()". 652 */ 653 vfs_start_t vfs_stdstart; 654 vfs_mount_t vfs_stdmount; 655 vfs_unmount_t vfs_stdunmount; 656 vfs_root_t vfs_stdroot; 657 vfs_quotactl_t vfs_stdquotactl; 658 vfs_statfs_t vfs_stdstatfs; 659 vfs_statvfs_t vfs_stdstatvfs; 660 vfs_sync_t vfs_stdsync; 661 vfs_sync_t vfs_stdnosync; 662 vfs_vget_t vfs_stdvget; 663 vfs_fhtovp_t vfs_stdfhtovp; 664 vfs_checkexp_t vfs_stdcheckexp; 665 vfs_vptofh_t vfs_stdvptofh; 666 vfs_init_t vfs_stdinit; 667 vfs_uninit_t vfs_stduninit; 668 vfs_extattrctl_t vfs_stdextattrctl; 669 670 struct vop_access_args; 671 int vop_helper_access(struct vop_access_args *ap, uid_t ino_uid, gid_t ino_gid, 672 mode_t ino_mode, u_int32_t ino_flags); 673 int vop_helper_setattr_flags(u_int32_t *ino_flags, u_int32_t vaflags, 674 uid_t uid, struct ucred *cred); 675 uid_t vop_helper_create_uid(struct mount *mp, mode_t dmode, uid_t duid, 676 struct ucred *cred, mode_t *modep); 677 int vop_helper_chmod(struct vnode *vp, mode_t new_mode, struct ucred *cred, 678 uid_t cur_uid, gid_t cur_gid, mode_t *cur_modep); 679 int vop_helper_chown(struct vnode *vp, uid_t new_uid, gid_t new_gid, 680 struct ucred *cred, 681 uid_t *cur_uidp, gid_t *cur_gidp, mode_t *cur_modep); 682 683 void add_bio_ops(struct bio_ops *ops); 684 void rem_bio_ops(struct bio_ops *ops); 685 686 int journal_mountctl(struct vop_mountctl_args *ap); 687 void journal_remove_all_journals(struct mount *mp, int flags); 688 689 void mountlist_insert(struct mount *, int); 690 int mountlist_interlock(int (*callback)(struct mount *), struct mount *); 691 struct mount *mountlist_boot_getfirst(void); 692 void mountlist_remove(struct mount *mp); 693 int mountlist_scan(int (*callback)(struct mount *, void *), void *, int); 694 struct mount *mount_get_by_nc(struct namecache *ncp); 695 #else /* !_KERNEL */ 696 697 #include <sys/cdefs.h> 698 699 __BEGIN_DECLS 700 int fstatfs (int, struct statfs *); 701 int getfh (const char *, fhandle_t *); 702 int getfsstat (struct statfs *, long, int); 703 int getmntinfo (struct statfs **, int); 704 int getmntvinfo (struct statfs **, struct statvfs **, int); 705 int mount (const char *, const char *, int, void *); 706 int statfs (const char *, struct statfs *); 707 int unmount (const char *, int); 708 int fhopen (const struct fhandle *, int); 709 int fhstat (const struct fhandle *, struct stat *); 710 int fhstatfs (const struct fhandle *, struct statfs *); 711 712 /* C library stuff */ 713 void endvfsent (void); 714 struct ovfsconf *getvfsbyname (const char *); 715 struct ovfsconf *getvfsbytype (int); 716 struct ovfsconf *getvfsent (void); 717 #define getvfsbyname new_getvfsbyname 718 int new_getvfsbyname (const char *, struct vfsconf *); 719 void setvfsent (int); 720 int vfsisloadable (const char *); 721 int vfsload (const char *); 722 __END_DECLS 723 724 #endif /* _KERNEL */ 725 726 #endif /* !_SYS_MOUNT_H_ */ 727 728