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 * All bio_ops callbacks must be MPSAFE and could be called without 128 * the mplock. 129 */ 130 struct buf; 131 132 struct bio_ops { 133 TAILQ_ENTRY(bio_ops) entry; 134 void (*io_start) (struct buf *); 135 void (*io_complete) (struct buf *); 136 void (*io_deallocate) (struct buf *); 137 int (*io_fsync) (struct vnode *); 138 int (*io_sync) (struct mount *); 139 void (*io_movedeps) (struct buf *, struct buf *); 140 int (*io_countdeps) (struct buf *, int); 141 int (*io_checkread) (struct buf *); 142 int (*io_checkwrite) (struct buf *); 143 }; 144 145 /* 146 * Structure per mounted file system. Each mounted file system has an 147 * array of operations and an instance record. The file systems are 148 * put on a doubly linked list. 149 * 150 * NOTE: mnt_nvnodelist and mnt_reservedvnlist. At the moment vnodes 151 * are linked into mnt_nvnodelist. At some point in the near future the 152 * vnode list will be split into a 'dirty' and 'clean' list. mnt_nvnodelist 153 * will become the dirty list and mnt_reservedvnlist will become the 'clean' 154 * list. Filesystem kld's syncing code should remain compatible since 155 * they only need to scan the dirty vnode list (nvnodelist -> dirtyvnodelist). 156 * 157 * NOTE: All VFSs must at least populate mnt_vn_ops or those VOP ops that 158 * only take namecache pointers will not be able to find their operations 159 * vector via namecache->nc_mount. 160 * 161 * MPSAFE NOTES: mnt_lock interlocks mounting and unmounting operations. 162 * 163 * mnt_token interlocks operations which adjust the mount 164 * structure and will also be held through VFS operations 165 * for VFSes not flagged MPSAFE. 166 */ 167 TAILQ_HEAD(vnodelst, vnode); 168 TAILQ_HEAD(journallst, journal); 169 170 struct mount { 171 TAILQ_ENTRY(mount) mnt_list; /* mount list */ 172 struct vfsops *mnt_op; /* operations on fs */ 173 struct vfsconf *mnt_vfc; /* configuration info */ 174 long mnt_namecache_gen; /* ++ to clear negative hits */ 175 struct vnode *mnt_syncer; /* syncer vnode */ 176 struct vnodelst mnt_nvnodelist; /* list of vnodes this mount */ 177 struct lock mnt_lock; /* mount structure lock */ 178 int mnt_flag; /* flags shared with user */ 179 int mnt_kern_flag; /* kernel only flags */ 180 int mnt_maxsymlinklen; /* max size of short symlink */ 181 struct statfs mnt_stat; /* cache of filesystem stats */ 182 struct statvfs mnt_vstat; /* extended stats */ 183 qaddr_t mnt_data; /* private data */ 184 time_t mnt_time; /* last time written*/ 185 u_int mnt_iosize_max; /* max IO request size */ 186 struct vnodelst mnt_reservedvnlist; /* (future) dirty vnode list */ 187 int mnt_nvnodelistsize; /* # of vnodes on this mount */ 188 189 /* 190 * ops vectors have a fixed stacking order. All primary calls run 191 * through mnt_vn_ops. This field is typically assigned to 192 * mnt_vn_norm_ops. If journaling has been enabled this field is 193 * usually assigned to mnt_vn_journal_ops. 194 */ 195 struct vop_ops *mnt_vn_use_ops; /* current ops set */ 196 197 struct vop_ops *mnt_vn_coherency_ops; /* cache coherency ops */ 198 struct vop_ops *mnt_vn_journal_ops; /* journaling ops */ 199 struct vop_ops *mnt_vn_norm_ops; /* for use by the VFS */ 200 struct vop_ops *mnt_vn_spec_ops; /* for use by the VFS */ 201 struct vop_ops *mnt_vn_fifo_ops; /* for use by the VFS */ 202 struct nchandle mnt_ncmountpt; /* mount point */ 203 struct nchandle mnt_ncmounton; /* mounted on */ 204 int mnt_refs; /* nchandle references */ 205 struct lwkt_token mnt_token; /* token lock if not MPSAFE */ 206 struct journallst mnt_jlist; /* list of active journals */ 207 u_int8_t *mnt_jbitmap; /* streamid bitmap */ 208 int16_t mnt_streamid; /* last streamid */ 209 210 struct bio_ops *mnt_bioops; /* BIO ops (hammer, softupd) */ 211 }; 212 213 #endif /* _KERNEL || _KERNEL_STRUCTURES */ 214 215 /* 216 * User specifiable flags. 217 */ 218 #define MNT_RDONLY 0x00000001 /* read only filesystem */ 219 #define MNT_SYNCHRONOUS 0x00000002 /* file system written synchronously */ 220 #define MNT_NOEXEC 0x00000004 /* can't exec from filesystem */ 221 #define MNT_NOSUID 0x00000008 /* don't honor setuid bits on fs */ 222 #define MNT_NODEV 0x00000010 /* don't interpret special files */ 223 #define MNT_UNION 0x00000020 /* union with underlying filesystem */ 224 #define MNT_ASYNC 0x00000040 /* file system written asynchronously */ 225 #define MNT_SUIDDIR 0x00100000 /* special handling of SUID on dirs */ 226 #define MNT_SOFTDEP 0x00200000 /* soft updates being done */ 227 #define MNT_NOSYMFOLLOW 0x00400000 /* do not follow symlinks */ 228 #define MNT_NOATIME 0x10000000 /* disable update of file access time */ 229 #define MNT_NOCLUSTERR 0x40000000 /* disable cluster read */ 230 #define MNT_NOCLUSTERW 0x80000000 /* disable cluster write */ 231 232 /* 233 * NFS export related mount flags. 234 */ 235 #define MNT_EXRDONLY 0x00000080 /* exported read only */ 236 #define MNT_EXPORTED 0x00000100 /* file system is exported */ 237 #define MNT_DEFEXPORTED 0x00000200 /* exported to the world */ 238 #define MNT_EXPORTANON 0x00000400 /* use anon uid mapping for everyone */ 239 #define MNT_EXKERB 0x00000800 /* exported with Kerberos uid mapping */ 240 #define MNT_EXPUBLIC 0x20000000 /* public export (WebNFS) */ 241 242 /* 243 * Flags set by internal operations, 244 * but visible to the user. 245 * XXX some of these are not quite right.. (I've never seen the root flag set) 246 */ 247 #define MNT_LOCAL 0x00001000 /* filesystem is stored locally */ 248 #define MNT_QUOTA 0x00002000 /* quotas are enabled on filesystem */ 249 #define MNT_ROOTFS 0x00004000 /* identifies the root filesystem */ 250 #define MNT_USER 0x00008000 /* mounted by a user */ 251 #define MNT_IGNORE 0x00800000 /* do not show entry in df */ 252 253 /* 254 * Mask of flags that are visible to statfs() 255 * XXX I think that this could now become (~(MNT_CMDFLAGS)) 256 * but the 'mount' program may need changing to handle this. 257 */ 258 #define MNT_VISFLAGMASK (MNT_RDONLY | MNT_SYNCHRONOUS | MNT_NOEXEC | \ 259 MNT_NOSUID | MNT_NODEV | MNT_UNION | \ 260 MNT_ASYNC | MNT_EXRDONLY | MNT_EXPORTED | \ 261 MNT_DEFEXPORTED | MNT_EXPORTANON| MNT_EXKERB | \ 262 MNT_LOCAL | MNT_USER | MNT_QUOTA | \ 263 MNT_ROOTFS | MNT_NOATIME | MNT_NOCLUSTERR| \ 264 MNT_NOCLUSTERW | MNT_SUIDDIR | MNT_SOFTDEP | \ 265 MNT_IGNORE | MNT_NOSYMFOLLOW | MNT_EXPUBLIC ) 266 /* 267 * External filesystem command modifier flags. 268 * Unmount can use the MNT_FORCE flag. 269 * XXX These are not STATES and really should be somewhere else. 270 */ 271 #define MNT_UPDATE 0x00010000 /* not a real mount, just an update */ 272 #define MNT_DELEXPORT 0x00020000 /* delete export host lists */ 273 #define MNT_RELOAD 0x00040000 /* reload filesystem data */ 274 #define MNT_FORCE 0x00080000 /* force unmount or readonly change */ 275 #define MNT_CMDFLAGS (MNT_UPDATE|MNT_DELEXPORT|MNT_RELOAD|MNT_FORCE) 276 /* 277 * Internal filesystem control flags stored in mnt_kern_flag. 278 * 279 * MNTK_UNMOUNT locks the mount entry so that name lookup cannot proceed 280 * past the mount point. This keeps the subtree stable during mounts 281 * and unmounts. 282 * 283 * MNTK_UNMOUNTF permits filesystems to detect a forced unmount while 284 * dounmount() is still waiting to lock the mountpoint. This allows 285 * the filesystem to cancel operations that might otherwise deadlock 286 * with the unmount attempt (used by NFS). 287 * 288 * MNTK_NOSTKMNT prevents mounting another filesystem inside the flagged one. 289 */ 290 #define MNTK_UNMOUNTF 0x00000001 /* forced unmount in progress */ 291 #define MNTK_MPSAFE 0x00010000 /* call vops without mnt_token lock */ 292 #define MNTK_RD_MPSAFE 0x00020000 /* vop_read is MPSAFE */ 293 #define MNTK_WR_MPSAFE 0x00040000 /* vop_write is MPSAFE */ 294 #define MNTK_GA_MPSAFE 0x00080000 /* vop_getattr is MPSAFE */ 295 #define MNTK_IN_MPSAFE 0x00100000 /* vop_inactive is MPSAFE */ 296 #define MNTK_SG_MPSAFE 0x00200000 /* vop_strategy is MPSAFE */ 297 #define MNTK_NCALIASED 0x00800000 /* namecached aliased */ 298 #define MNTK_UNMOUNT 0x01000000 /* unmount in progress */ 299 #define MNTK_MWAIT 0x02000000 /* waiting for unmount to finish */ 300 #define MNTK_WANTRDWR 0x04000000 /* upgrade to read/write requested */ 301 #define MNTK_FSMID 0x08000000 /* getattr supports FSMIDs */ 302 #define MNTK_NOSTKMNT 0x10000000 /* no stacked mount point allowed */ 303 #define MNTK_NOMSYNC 0x20000000 /* used by tmpfs */ 304 305 #define MNTK_ALL_MPSAFE (MNTK_MPSAFE | MNTK_RD_MPSAFE | MNTK_WR_MPSAFE | \ 306 MNTK_GA_MPSAFE | MNTK_IN_MPSAFE | MNTK_SG_MPSAFE) 307 308 /* 309 * mountlist_*() defines 310 */ 311 #define MNTSCAN_FORWARD 0x0001 312 #define MNTSCAN_REVERSE 0x0002 313 #define MNTSCAN_NOBUSY 0x0004 314 315 #define MNTINS_FIRST 0x0001 316 #define MNTINS_LAST 0x0002 317 318 /* 319 * Sysctl CTL_VFS definitions. 320 * 321 * Second level identifier specifies which filesystem. Second level 322 * identifier VFS_VFSCONF returns information about all filesystems. 323 * Second level identifier VFS_GENERIC is non-terminal. 324 */ 325 #define VFS_VFSCONF 0 /* get configured filesystems */ 326 #define VFS_GENERIC 0 /* generic filesystem information */ 327 /* 328 * Third level identifiers for VFS_GENERIC are given below; third 329 * level identifiers for specific filesystems are given in their 330 * mount specific header files. 331 */ 332 #define VFS_MAXTYPENUM 1 /* int: highest defined filesystem type */ 333 #define VFS_CONF 2 /* struct: vfsconf for filesystem given 334 as next argument */ 335 336 /* 337 * VFS MPLOCK helper. 338 */ 339 #define VFS_MPLOCK_DECLARE int xlock_mpsafe 340 341 #define VFS_MPLOCK1(mp) VFS_MPLOCK_FLAG(mp, MNTK_MPSAFE) 342 343 #define VFS_MPLOCK2(mp) \ 344 do { \ 345 if (xlock_mpsafe) { \ 346 get_mplock(); /* TEMPORARY */ \ 347 lwkt_gettoken(&mp->mnt_token); \ 348 xlock_mpsafe = 0; \ 349 } \ 350 } while(0) 351 352 #define VFS_MPLOCK_FLAG(mp, flag) \ 353 do { \ 354 if (mp->mnt_kern_flag & flag) { \ 355 xlock_mpsafe = 1; \ 356 } else { \ 357 get_mplock(); /* TEMPORARY */ \ 358 lwkt_gettoken(&mp->mnt_token); \ 359 xlock_mpsafe = 0; \ 360 } \ 361 } while(0) 362 363 #define VFS_MPUNLOCK(mp) \ 364 do { \ 365 if (xlock_mpsafe == 0) { \ 366 lwkt_reltoken(&mp->mnt_token); \ 367 rel_mplock(); /* TEMPORARY */ \ 368 } \ 369 } while(0) 370 371 /* 372 * Flags for various system call interfaces. 373 * 374 * waitfor flags to vfs_sync() and getfsstat() 375 */ 376 #define MNT_WAIT 1 /* synchronously wait for I/O to complete */ 377 #define MNT_NOWAIT 2 /* start all I/O, but do not wait for it */ 378 #define MNT_LAZY 4 /* be lazy and do not necessarily push it all */ 379 380 #define VOP_FSYNC_SYSCALL 0x0001 /* from system call */ 381 382 /* 383 * Generic file handle 384 */ 385 struct fhandle { 386 fsid_t fh_fsid; /* File system id of mount point */ 387 struct fid fh_fid; /* File sys specific id */ 388 }; 389 typedef struct fhandle fhandle_t; 390 391 /* 392 * Export arguments for local filesystem mount calls. 393 */ 394 struct export_args { 395 int ex_flags; /* export related flags */ 396 uid_t ex_root; /* mapping for root uid */ 397 struct ucred ex_anon; /* mapping for anonymous user */ 398 struct sockaddr *ex_addr; /* net address to which exported */ 399 int ex_addrlen; /* and the net address length */ 400 struct sockaddr *ex_mask; /* mask of valid bits in saddr */ 401 int ex_masklen; /* and the smask length */ 402 char *ex_indexfile; /* index file for WebNFS URLs */ 403 }; 404 405 /* 406 * Structure holding information for a publicly exported filesystem 407 * (WebNFS). Currently the specs allow just for one such filesystem. 408 */ 409 struct nfs_public { 410 int np_valid; /* Do we hold valid information */ 411 fhandle_t np_handle; /* Filehandle for pub fs (internal) */ 412 struct mount *np_mount; /* Mountpoint of exported fs */ 413 char *np_index; /* Index file */ 414 }; 415 416 /* 417 * Filesystem configuration information. One of these exists for each 418 * type of filesystem supported by the kernel. These are searched at 419 * mount time to identify the requested filesystem. 420 */ 421 #ifndef _SYS_QUEUE_H_ 422 #include <sys/queue.h> 423 #endif 424 struct vfsconf { 425 struct vfsops *vfc_vfsops; /* filesystem operations vector */ 426 char vfc_name[MFSNAMELEN]; /* filesystem type name */ 427 int vfc_typenum; /* historic filesystem type number */ 428 int vfc_refcount; /* number mounted of this type */ 429 int vfc_flags; /* permanent flags */ 430 STAILQ_ENTRY(vfsconf) vfc_next; /* next in list */ 431 }; 432 433 struct ovfsconf { 434 void *vfc_vfsops; 435 char vfc_name[32]; 436 int vfc_index; 437 int vfc_refcount; 438 int vfc_flags; 439 }; 440 441 /* 442 * NB: these flags refer to IMPLEMENTATION properties, not properties of 443 * any actual mounts; i.e., it does not make sense to change the flags. 444 */ 445 #define VFCF_STATIC 0x00010000 /* statically compiled into kernel */ 446 #define VFCF_NETWORK 0x00020000 /* may get data over the network */ 447 #define VFCF_READONLY 0x00040000 /* writes are not implemented */ 448 #define VFCF_SYNTHETIC 0x00080000 /* data does not represent real files */ 449 #define VFCF_LOOPBACK 0x00100000 /* aliases some other mounted FS */ 450 #define VFCF_UNICODE 0x00200000 /* stores file names as Unicode*/ 451 452 #ifdef _KERNEL 453 454 #ifdef MALLOC_DECLARE 455 MALLOC_DECLARE(M_MOUNT); 456 #endif 457 extern int nfs_mount_type; /* vfc_typenum for nfs, or -1 */ 458 459 struct vfsconf *vfsconf_find_by_name(const char *); 460 struct vfsconf *vfsconf_find_by_typenum(int); 461 int vfsconf_get_maxtypenum(void); 462 int vfsconf_each(int (*)(struct vfsconf *, void *), void *); 463 464 #endif 465 466 #if defined(_KERNEL) || defined(_KERNEL_STRUCTURES) 467 468 TAILQ_HEAD(mntlist, mount); /* struct mntlist */ 469 470 /* 471 * Operations supported on mounted file system. 472 */ 473 #ifdef __STDC__ 474 struct nlookupdata; 475 struct nlookupdata; 476 struct mbuf; 477 #endif 478 479 typedef int vfs_mount_t(struct mount *mp, char *path, caddr_t data, 480 struct ucred *cred); 481 typedef int vfs_start_t(struct mount *mp, int flags); 482 typedef int vfs_unmount_t(struct mount *mp, int mntflags); 483 typedef int vfs_root_t(struct mount *mp, struct vnode **vpp); 484 typedef int vfs_quotactl_t(struct mount *mp, int cmds, uid_t uid, caddr_t arg, 485 struct ucred *cred); 486 typedef int vfs_statfs_t(struct mount *mp, struct statfs *sbp, 487 struct ucred *cred); 488 typedef int vfs_statvfs_t(struct mount *mp, struct statvfs *sbp, 489 struct ucred *cred); 490 typedef int vfs_sync_t(struct mount *mp, int waitfor); 491 typedef int vfs_vget_t(struct mount *mp, struct vnode *dvp, 492 ino_t ino, struct vnode **vpp); 493 typedef int vfs_fhtovp_t(struct mount *mp, struct vnode *rootvp, 494 struct fid *fhp, struct vnode **vpp); 495 typedef int vfs_checkexp_t(struct mount *mp, struct sockaddr *nam, 496 int *extflagsp, struct ucred **credanonp); 497 typedef int vfs_vptofh_t(struct vnode *vp, struct fid *fhp); 498 typedef int vfs_init_t(struct vfsconf *); 499 typedef int vfs_uninit_t(struct vfsconf *); 500 typedef int vfs_extattrctl_t(struct mount *mp, int cmd, struct vnode *vp, 501 int attrnamespace, const char *attrname, 502 struct ucred *cred); 503 504 int vfs_mount(struct mount *mp, char *path, caddr_t data, struct ucred *cred); 505 int vfs_start(struct mount *mp, int flags); 506 int vfs_unmount(struct mount *mp, int mntflags); 507 int vfs_root(struct mount *mp, struct vnode **vpp); 508 int vfs_quotactl(struct mount *mp, int cmds, uid_t uid, caddr_t arg, 509 struct ucred *cred); 510 int vfs_statfs(struct mount *mp, struct statfs *sbp, struct ucred *cred); 511 int vfs_statvfs(struct mount *mp, struct statvfs *sbp, struct ucred *cred); 512 int vfs_sync(struct mount *mp, int waitfor); 513 int vfs_vget(struct mount *mp, struct vnode *dvp, 514 ino_t ino, struct vnode **vpp); 515 int vfs_fhtovp(struct mount *mp, struct vnode *rootvp, 516 struct fid *fhp, struct vnode **vpp); 517 int vfs_checkexp(struct mount *mp, struct sockaddr *nam, 518 int *extflagsp, struct ucred **credanonp); 519 int vfs_vptofh(struct vnode *vp, struct fid *fhp); 520 int vfs_init(struct vfsconf *vfc); 521 int vfs_uninit(struct vfsconf *vfc, struct vfsconf *vfsp); 522 int vfs_extattrctl(struct mount *mp, int cmd, struct vnode *vp, 523 int attrnamespace, const char *attrname, 524 struct ucred *cred); 525 526 527 struct vfsops { 528 vfs_mount_t *vfs_mount; 529 vfs_start_t *vfs_start; 530 vfs_unmount_t *vfs_unmount; 531 vfs_root_t *vfs_root; 532 vfs_quotactl_t *vfs_quotactl; 533 vfs_statfs_t *vfs_statfs; 534 vfs_sync_t *vfs_sync; 535 vfs_vget_t *vfs_vget; 536 vfs_fhtovp_t *vfs_fhtovp; 537 vfs_checkexp_t *vfs_checkexp; 538 vfs_vptofh_t *vfs_vptofh; 539 vfs_init_t *vfs_init; 540 vfs_uninit_t *vfs_uninit; 541 vfs_extattrctl_t *vfs_extattrctl; 542 vfs_statvfs_t *vfs_statvfs; 543 }; 544 545 #define VFS_MOUNT(MP, PATH, DATA, CRED) \ 546 vfs_mount(MP, PATH, DATA, CRED) 547 #define VFS_START(MP, FLAGS) \ 548 vfs_start(MP, FLAGS) 549 #define VFS_UNMOUNT(MP, FORCE) \ 550 vfs_unmount(MP, FORCE) 551 #define VFS_ROOT(MP, VPP) \ 552 vfs_root(MP, VPP) 553 #define VFS_QUOTACTL(MP, C, U, A, CRED) \ 554 vfs_quotactl(MP, C, U, A, CRED) 555 #define VFS_STATFS(MP, SBP, CRED) \ 556 vfs_statfs(MP, SBP, CRED) 557 #define VFS_STATVFS(MP, SBP, CRED) \ 558 vfs_statvfs(MP, SBP, CRED) 559 #define VFS_SYNC(MP, WAIT) \ 560 vfs_sync(MP, WAIT) 561 #define VFS_VGET(MP, DVP, INO, VPP) \ 562 vfs_vget(MP, DVP, INO, VPP) 563 #define VFS_FHTOVP(MP, ROOTVP, FIDP, VPP) \ 564 vfs_fhtovp(MP, ROOTVP, FIDP, VPP) 565 #define VFS_VPTOFH(VP, FIDP) \ 566 vfs_vptofh(VP, FIDP) 567 #define VFS_CHECKEXP(MP, NAM, EXFLG, CRED) \ 568 vfs_checkexp(MP, NAM, EXFLG, CRED) 569 #define VFS_EXTATTRCTL(MP, C, FVP, NS, N, CRED) \ 570 vfs_extattrctl(MP, C, FVP, NS, N, CRED) 571 572 #endif 573 574 #ifdef _KERNEL 575 576 #include <sys/module.h> 577 578 #define VFS_SET(vfsops, fsname, flags) \ 579 static struct vfsconf fsname ## _vfsconf = { \ 580 &vfsops, \ 581 #fsname, \ 582 -1, \ 583 0, \ 584 flags, \ 585 { NULL }, \ 586 }; \ 587 static moduledata_t fsname ## _mod = { \ 588 #fsname, \ 589 vfs_modevent, \ 590 & fsname ## _vfsconf \ 591 }; \ 592 DECLARE_MODULE(fsname, fsname ## _mod, SI_SUB_VFS, SI_ORDER_MIDDLE) 593 594 #endif 595 596 #if defined(_KERNEL) || defined(_KERNEL_STRUCTURES) 597 598 #include <net/radix.h> 599 600 #define AF_MAX 36 /* XXX */ 601 602 /* 603 * Network address lookup element 604 */ 605 struct netcred { 606 struct radix_node netc_rnodes[2]; 607 int netc_exflags; 608 struct ucred netc_anon; 609 }; 610 611 /* 612 * Network export information 613 */ 614 struct netexport { 615 struct netcred ne_defexported; /* Default export */ 616 struct radix_node_head *ne_rtable[AF_MAX+1]; /* Individual exports */ 617 }; 618 619 #endif 620 621 #ifdef _KERNEL 622 623 extern char *mountrootfsname; 624 625 /* 626 * exported vnode operations 627 */ 628 int dounmount (struct mount *, int); 629 int vfs_setpublicfs /* set publicly exported fs */ 630 (struct mount *, struct netexport *, const struct export_args *); 631 int vfs_lock (struct mount *); /* lock a vfs */ 632 void vfs_msync (struct mount *, int); 633 void vfs_unlock (struct mount *); /* unlock a vfs */ 634 int vfs_busy (struct mount *, int); 635 void vfs_bufstats(void); 636 int vfs_export /* process mount export info */ 637 (struct mount *, struct netexport *, const struct export_args *); 638 struct netcred *vfs_export_lookup /* lookup host in fs export list */ 639 (struct mount *, struct netexport *, struct sockaddr *); 640 int vfs_allocate_syncvnode (struct mount *); 641 void vfs_getnewfsid (struct mount *); 642 int vfs_setfsid(struct mount *mp, fsid_t *template); 643 cdev_t vfs_getrootfsid (struct mount *); 644 struct mount *vfs_getvfs (fsid_t *); /* return vfs given fsid */ 645 int vfs_modevent (module_t, int, void *); 646 int vfs_mountedon (struct vnode *); /* is a vfs mounted on vp */ 647 int vfs_rootmountalloc (char *, char *, struct mount **); 648 void vfs_unbusy (struct mount *); 649 void vfs_unmountall (void); 650 int vfs_register (struct vfsconf *); 651 int vfs_unregister (struct vfsconf *); 652 extern struct nfs_public nfs_pub; 653 654 /* 655 * Declarations for these vfs default operations are located in 656 * kern/vfs_default.c, they should be used instead of making "dummy" 657 * functions or casting entries in the VFS op table to "enopnotsupp()". 658 */ 659 vfs_start_t vfs_stdstart; 660 vfs_mount_t vfs_stdmount; 661 vfs_unmount_t vfs_stdunmount; 662 vfs_root_t vfs_stdroot; 663 vfs_quotactl_t vfs_stdquotactl; 664 vfs_statfs_t vfs_stdstatfs; 665 vfs_statvfs_t vfs_stdstatvfs; 666 vfs_sync_t vfs_stdsync; 667 vfs_sync_t vfs_stdnosync; 668 vfs_vget_t vfs_stdvget; 669 vfs_fhtovp_t vfs_stdfhtovp; 670 vfs_checkexp_t vfs_stdcheckexp; 671 vfs_vptofh_t vfs_stdvptofh; 672 vfs_init_t vfs_stdinit; 673 vfs_uninit_t vfs_stduninit; 674 vfs_extattrctl_t vfs_stdextattrctl; 675 676 struct vop_access_args; 677 int vop_helper_access(struct vop_access_args *ap, uid_t ino_uid, gid_t ino_gid, 678 mode_t ino_mode, u_int32_t ino_flags); 679 int vop_helper_setattr_flags(u_int32_t *ino_flags, u_int32_t vaflags, 680 uid_t uid, struct ucred *cred); 681 uid_t vop_helper_create_uid(struct mount *mp, mode_t dmode, uid_t duid, 682 struct ucred *cred, mode_t *modep); 683 int vop_helper_chmod(struct vnode *vp, mode_t new_mode, struct ucred *cred, 684 uid_t cur_uid, gid_t cur_gid, mode_t *cur_modep); 685 int vop_helper_chown(struct vnode *vp, uid_t new_uid, gid_t new_gid, 686 struct ucred *cred, 687 uid_t *cur_uidp, gid_t *cur_gidp, mode_t *cur_modep); 688 689 void add_bio_ops(struct bio_ops *ops); 690 void rem_bio_ops(struct bio_ops *ops); 691 692 int journal_mountctl(struct vop_mountctl_args *ap); 693 void journal_remove_all_journals(struct mount *mp, int flags); 694 695 void mountlist_insert(struct mount *, int); 696 int mountlist_interlock(int (*callback)(struct mount *), struct mount *); 697 struct mount *mountlist_boot_getfirst(void); 698 void mountlist_remove(struct mount *mp); 699 int mountlist_scan(int (*callback)(struct mount *, void *), void *, int); 700 struct mount *mount_get_by_nc(struct namecache *ncp); 701 #else /* !_KERNEL */ 702 703 #include <sys/cdefs.h> 704 705 __BEGIN_DECLS 706 int fstatfs (int, struct statfs *); 707 int getfh (const char *, fhandle_t *); 708 int getfsstat (struct statfs *, long, int); 709 int getmntinfo (struct statfs **, int); 710 int getmntvinfo (struct statfs **, struct statvfs **, int); 711 int mount (const char *, const char *, int, void *); 712 int statfs (const char *, struct statfs *); 713 int unmount (const char *, int); 714 int fhopen (const struct fhandle *, int); 715 int fhstat (const struct fhandle *, struct stat *); 716 int fhstatfs (const struct fhandle *, struct statfs *); 717 718 /* C library stuff */ 719 void endvfsent (void); 720 struct ovfsconf *getvfsbyname (const char *); 721 struct ovfsconf *getvfsbytype (int); 722 struct ovfsconf *getvfsent (void); 723 #define getvfsbyname new_getvfsbyname 724 int new_getvfsbyname (const char *, struct vfsconf *); 725 void setvfsent (int); 726 int vfsisloadable (const char *); 727 int vfsload (const char *); 728 __END_DECLS 729 730 #endif /* _KERNEL */ 731 732 #endif /* !_SYS_MOUNT_H_ */ 733 734