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sys/sys/mount.h
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1 /*- 2 * SPDX-License-Identifier: BSD-3-Clause 3 * 4 * Copyright (c) 1989, 1991, 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. Neither the name of the University nor the names of its contributors 16 * may be used to endorse or promote products derived from this software 17 * without specific prior written permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29 * SUCH DAMAGE. 30 * 31 * @(#)mount.h 8.21 (Berkeley) 5/20/95 32 * $FreeBSD$ 33 */ 34 35 #ifndef _SYS_MOUNT_H_ 36 #define _SYS_MOUNT_H_ 37 38 #include <sys/ucred.h> 39 #include <sys/queue.h> 40 #ifdef _KERNEL 41 #include <sys/lock.h> 42 #include <sys/lockmgr.h> 43 #include <sys/tslog.h> 44 #include <sys/_mutex.h> 45 #include <sys/_sx.h> 46 #endif 47 48 /* 49 * NOTE: When changing statfs structure, mount structure, MNT_* flags or 50 * MNTK_* flags also update DDB show mount command in vfs_subr.c. 51 */ 52 53 typedef struct fsid { int32_t val[2]; } fsid_t; /* filesystem id type */ 54 55 #define fsidcmp(a, b) memcmp((a), (b), sizeof(fsid_t)) 56 57 /* 58 * File identifier. 59 * These are unique per filesystem on a single machine. 60 * 61 * Note that the offset of fid_data is 4 bytes, so care must be taken to avoid 62 * undefined behavior accessing unaligned fields within an embedded struct. 63 */ 64 #define MAXFIDSZ 16 65 66 struct fid { 67 u_short fid_len; /* length of data in bytes */ 68 u_short fid_data0; /* force longword alignment */ 69 char fid_data[MAXFIDSZ]; /* data (variable length) */ 70 }; 71 72 /* 73 * filesystem statistics 74 */ 75 #define MFSNAMELEN 16 /* length of type name including null */ 76 #define MNAMELEN 1024 /* size of on/from name bufs */ 77 #define STATFS_VERSION 0x20140518 /* current version number */ 78 struct statfs { 79 uint32_t f_version; /* structure version number */ 80 uint32_t f_type; /* type of filesystem */ 81 uint64_t f_flags; /* copy of mount exported flags */ 82 uint64_t f_bsize; /* filesystem fragment size */ 83 uint64_t f_iosize; /* optimal transfer block size */ 84 uint64_t f_blocks; /* total data blocks in filesystem */ 85 uint64_t f_bfree; /* free blocks in filesystem */ 86 int64_t f_bavail; /* free blocks avail to non-superuser */ 87 uint64_t f_files; /* total file nodes in filesystem */ 88 int64_t f_ffree; /* free nodes avail to non-superuser */ 89 uint64_t f_syncwrites; /* count of sync writes since mount */ 90 uint64_t f_asyncwrites; /* count of async writes since mount */ 91 uint64_t f_syncreads; /* count of sync reads since mount */ 92 uint64_t f_asyncreads; /* count of async reads since mount */ 93 uint64_t f_spare[10]; /* unused spare */ 94 uint32_t f_namemax; /* maximum filename length */ 95 uid_t f_owner; /* user that mounted the filesystem */ 96 fsid_t f_fsid; /* filesystem id */ 97 char f_charspare[80]; /* spare string space */ 98 char f_fstypename[MFSNAMELEN]; /* filesystem type name */ 99 char f_mntfromname[MNAMELEN]; /* mounted filesystem */ 100 char f_mntonname[MNAMELEN]; /* directory on which mounted */ 101 }; 102 103 #if defined(_WANT_FREEBSD11_STATFS) || defined(_KERNEL) 104 #define FREEBSD11_STATFS_VERSION 0x20030518 /* current version number */ 105 struct freebsd11_statfs { 106 uint32_t f_version; /* structure version number */ 107 uint32_t f_type; /* type of filesystem */ 108 uint64_t f_flags; /* copy of mount exported flags */ 109 uint64_t f_bsize; /* filesystem fragment size */ 110 uint64_t f_iosize; /* optimal transfer block size */ 111 uint64_t f_blocks; /* total data blocks in filesystem */ 112 uint64_t f_bfree; /* free blocks in filesystem */ 113 int64_t f_bavail; /* free blocks avail to non-superuser */ 114 uint64_t f_files; /* total file nodes in filesystem */ 115 int64_t f_ffree; /* free nodes avail to non-superuser */ 116 uint64_t f_syncwrites; /* count of sync writes since mount */ 117 uint64_t f_asyncwrites; /* count of async writes since mount */ 118 uint64_t f_syncreads; /* count of sync reads since mount */ 119 uint64_t f_asyncreads; /* count of async reads since mount */ 120 uint64_t f_spare[10]; /* unused spare */ 121 uint32_t f_namemax; /* maximum filename length */ 122 uid_t f_owner; /* user that mounted the filesystem */ 123 fsid_t f_fsid; /* filesystem id */ 124 char f_charspare[80]; /* spare string space */ 125 char f_fstypename[16]; /* filesystem type name */ 126 char f_mntfromname[88]; /* mounted filesystem */ 127 char f_mntonname[88]; /* directory on which mounted */ 128 }; 129 #endif /* _WANT_FREEBSD11_STATFS || _KERNEL */ 130 131 #ifdef _KERNEL 132 #define OMFSNAMELEN 16 /* length of fs type name, including null */ 133 #define OMNAMELEN (88 - 2 * sizeof(long)) /* size of on/from name bufs */ 134 135 /* XXX getfsstat.2 is out of date with write and read counter changes here. */ 136 /* XXX statfs.2 is out of date with read counter changes here. */ 137 struct ostatfs { 138 long f_spare2; /* placeholder */ 139 long f_bsize; /* fundamental filesystem block size */ 140 long f_iosize; /* optimal transfer block size */ 141 long f_blocks; /* total data blocks in filesystem */ 142 long f_bfree; /* free blocks in fs */ 143 long f_bavail; /* free blocks avail to non-superuser */ 144 long f_files; /* total file nodes in filesystem */ 145 long f_ffree; /* free file nodes in fs */ 146 fsid_t f_fsid; /* filesystem id */ 147 uid_t f_owner; /* user that mounted the filesystem */ 148 int f_type; /* type of filesystem */ 149 int f_flags; /* copy of mount exported flags */ 150 long f_syncwrites; /* count of sync writes since mount */ 151 long f_asyncwrites; /* count of async writes since mount */ 152 char f_fstypename[OMFSNAMELEN]; /* fs type name */ 153 char f_mntonname[OMNAMELEN]; /* directory on which mounted */ 154 long f_syncreads; /* count of sync reads since mount */ 155 long f_asyncreads; /* count of async reads since mount */ 156 short f_spares1; /* unused spare */ 157 char f_mntfromname[OMNAMELEN];/* mounted filesystem */ 158 short f_spares2; /* unused spare */ 159 /* 160 * XXX on machines where longs are aligned to 8-byte boundaries, there 161 * is an unnamed int32_t here. This spare was after the apparent end 162 * of the struct until we bit off the read counters from f_mntonname. 163 */ 164 long f_spare[2]; /* unused spare */ 165 }; 166 167 TAILQ_HEAD(vnodelst, vnode); 168 169 /* Mount options list */ 170 TAILQ_HEAD(vfsoptlist, vfsopt); 171 struct vfsopt { 172 TAILQ_ENTRY(vfsopt) link; 173 char *name; 174 void *value; 175 int len; 176 int pos; 177 int seen; 178 }; 179 180 /* 181 * Structure per mounted filesystem. Each mounted filesystem has an 182 * array of operations and an instance record. The filesystems are 183 * put on a doubly linked list. 184 * 185 * Lock reference: 186 * l - mnt_listmtx 187 * m - mountlist_mtx 188 * i - interlock 189 * i* - interlock of uppers' list head 190 * v - vnode freelist mutex 191 * 192 * Unmarked fields are considered stable as long as a ref is held. 193 * 194 */ 195 struct mount { 196 struct mtx mnt_mtx; /* mount structure interlock */ 197 int mnt_gen; /* struct mount generation */ 198 #define mnt_startzero mnt_list 199 TAILQ_ENTRY(mount) mnt_list; /* (m) mount list */ 200 struct vfsops *mnt_op; /* operations on fs */ 201 struct vfsconf *mnt_vfc; /* configuration info */ 202 struct vnode *mnt_vnodecovered; /* vnode we mounted on */ 203 struct vnode *mnt_syncer; /* syncer vnode */ 204 int mnt_ref; /* (i) Reference count */ 205 struct vnodelst mnt_nvnodelist; /* (i) list of vnodes */ 206 int mnt_nvnodelistsize; /* (i) # of vnodes */ 207 int mnt_writeopcount; /* (i) write syscalls pending */ 208 int mnt_kern_flag; /* (i) kernel only flags */ 209 uint64_t mnt_flag; /* (i) flags shared with user */ 210 struct vfsoptlist *mnt_opt; /* current mount options */ 211 struct vfsoptlist *mnt_optnew; /* new options passed to fs */ 212 uint64_t mnt_maxsymlinklen; /* max size of short symlink */ 213 struct statfs mnt_stat; /* cache of filesystem stats */ 214 struct ucred *mnt_cred; /* credentials of mounter */ 215 void * mnt_data; /* private data */ 216 time_t mnt_time; /* last time written*/ 217 int mnt_iosize_max; /* max size for clusters, etc */ 218 struct netexport *mnt_export; /* export list */ 219 struct label *mnt_label; /* MAC label for the fs */ 220 u_int mnt_hashseed; /* Random seed for vfs_hash */ 221 int mnt_lockref; /* (i) Lock reference count */ 222 int mnt_secondary_writes; /* (i) # of secondary writes */ 223 int mnt_secondary_accwrites;/* (i) secondary wr. starts */ 224 struct thread *mnt_susp_owner; /* (i) thread owning suspension */ 225 #define mnt_endzero mnt_gjprovider 226 char *mnt_gjprovider; /* gjournal provider name */ 227 struct mtx mnt_listmtx; 228 struct vnodelst mnt_activevnodelist; /* (l) list of active vnodes */ 229 int mnt_activevnodelistsize;/* (l) # of active vnodes */ 230 struct vnodelst mnt_tmpfreevnodelist; /* (l) list of free vnodes */ 231 int mnt_tmpfreevnodelistsize;/* (l) # of free vnodes */ 232 struct lock mnt_explock; /* vfs_export walkers lock */ 233 TAILQ_ENTRY(mount) mnt_upper_link; /* (i*) we in the all uppers */ 234 TAILQ_HEAD(, mount) mnt_uppers; /* (i) upper mounts over us */ 235 }; 236 237 /* 238 * Definitions for MNT_VNODE_FOREACH_ALL. 239 */ 240 struct vnode *__mnt_vnode_next_all(struct vnode **mvp, struct mount *mp); 241 struct vnode *__mnt_vnode_first_all(struct vnode **mvp, struct mount *mp); 242 void __mnt_vnode_markerfree_all(struct vnode **mvp, struct mount *mp); 243 244 #define MNT_VNODE_FOREACH_ALL(vp, mp, mvp) \ 245 for (vp = __mnt_vnode_first_all(&(mvp), (mp)); \ 246 (vp) != NULL; vp = __mnt_vnode_next_all(&(mvp), (mp))) 247 248 #define MNT_VNODE_FOREACH_ALL_ABORT(mp, mvp) \ 249 do { \ 250 MNT_ILOCK(mp); \ 251 __mnt_vnode_markerfree_all(&(mvp), (mp)); \ 252 /* MNT_IUNLOCK(mp); -- done in above function */ \ 253 mtx_assert(MNT_MTX(mp), MA_NOTOWNED); \ 254 } while (0) 255 256 /* 257 * Definitions for MNT_VNODE_FOREACH_ACTIVE. 258 */ 259 struct vnode *__mnt_vnode_next_active(struct vnode **mvp, struct mount *mp); 260 struct vnode *__mnt_vnode_first_active(struct vnode **mvp, struct mount *mp); 261 void __mnt_vnode_markerfree_active(struct vnode **mvp, struct mount *); 262 263 #define MNT_VNODE_FOREACH_ACTIVE(vp, mp, mvp) \ 264 for (vp = __mnt_vnode_first_active(&(mvp), (mp)); \ 265 (vp) != NULL; vp = __mnt_vnode_next_active(&(mvp), (mp))) 266 267 #define MNT_VNODE_FOREACH_ACTIVE_ABORT(mp, mvp) \ 268 __mnt_vnode_markerfree_active(&(mvp), (mp)) 269 270 #define MNT_ILOCK(mp) mtx_lock(&(mp)->mnt_mtx) 271 #define MNT_ITRYLOCK(mp) mtx_trylock(&(mp)->mnt_mtx) 272 #define MNT_IUNLOCK(mp) mtx_unlock(&(mp)->mnt_mtx) 273 #define MNT_MTX(mp) (&(mp)->mnt_mtx) 274 #define MNT_REF(mp) (mp)->mnt_ref++ 275 #define MNT_REL(mp) do { \ 276 KASSERT((mp)->mnt_ref > 0, ("negative mnt_ref")); \ 277 (mp)->mnt_ref--; \ 278 if ((mp)->mnt_ref == 0) \ 279 wakeup((mp)); \ 280 } while (0) 281 282 #endif /* _KERNEL */ 283 284 /* 285 * User specifiable flags, stored in mnt_flag. 286 */ 287 #define MNT_RDONLY 0x0000000000000001ULL /* read only filesystem */ 288 #define MNT_SYNCHRONOUS 0x0000000000000002ULL /* fs written synchronously */ 289 #define MNT_NOEXEC 0x0000000000000004ULL /* can't exec from filesystem */ 290 #define MNT_NOSUID 0x0000000000000008ULL /* don't honor setuid fs bits */ 291 #define MNT_NFS4ACLS 0x0000000000000010ULL /* enable NFS version 4 ACLs */ 292 #define MNT_UNION 0x0000000000000020ULL /* union with underlying fs */ 293 #define MNT_ASYNC 0x0000000000000040ULL /* fs written asynchronously */ 294 #define MNT_SUIDDIR 0x0000000000100000ULL /* special SUID dir handling */ 295 #define MNT_SOFTDEP 0x0000000000200000ULL /* using soft updates */ 296 #define MNT_NOSYMFOLLOW 0x0000000000400000ULL /* do not follow symlinks */ 297 #define MNT_GJOURNAL 0x0000000002000000ULL /* GEOM journal support enabled */ 298 #define MNT_MULTILABEL 0x0000000004000000ULL /* MAC support for objects */ 299 #define MNT_ACLS 0x0000000008000000ULL /* ACL support enabled */ 300 #define MNT_NOATIME 0x0000000010000000ULL /* dont update file access time */ 301 #define MNT_NOCLUSTERR 0x0000000040000000ULL /* disable cluster read */ 302 #define MNT_NOCLUSTERW 0x0000000080000000ULL /* disable cluster write */ 303 #define MNT_SUJ 0x0000000100000000ULL /* using journaled soft updates */ 304 #define MNT_AUTOMOUNTED 0x0000000200000000ULL /* mounted by automountd(8) */ 305 #define MNT_UNTRUSTED 0x0000000800000000ULL /* filesys metadata untrusted */ 306 307 /* 308 * NFS export related mount flags. 309 */ 310 #define MNT_EXRDONLY 0x0000000000000080ULL /* exported read only */ 311 #define MNT_EXPORTED 0x0000000000000100ULL /* filesystem is exported */ 312 #define MNT_DEFEXPORTED 0x0000000000000200ULL /* exported to the world */ 313 #define MNT_EXPORTANON 0x0000000000000400ULL /* anon uid mapping for all */ 314 #define MNT_EXKERB 0x0000000000000800ULL /* exported with Kerberos */ 315 #define MNT_EXPUBLIC 0x0000000020000000ULL /* public export (WebNFS) */ 316 317 /* 318 * Flags set by internal operations, 319 * but visible to the user. 320 * XXX some of these are not quite right.. (I've never seen the root flag set) 321 */ 322 #define MNT_LOCAL 0x0000000000001000ULL /* filesystem is stored locally */ 323 #define MNT_QUOTA 0x0000000000002000ULL /* quotas are enabled on fs */ 324 #define MNT_ROOTFS 0x0000000000004000ULL /* identifies the root fs */ 325 #define MNT_USER 0x0000000000008000ULL /* mounted by a user */ 326 #define MNT_IGNORE 0x0000000000800000ULL /* do not show entry in df */ 327 #define MNT_VERIFIED 0x0000000400000000ULL /* filesystem is verified */ 328 329 /* 330 * Mask of flags that are visible to statfs(). 331 * XXX I think that this could now become (~(MNT_CMDFLAGS)) 332 * but the 'mount' program may need changing to handle this. 333 */ 334 #define MNT_VISFLAGMASK (MNT_RDONLY | MNT_SYNCHRONOUS | MNT_NOEXEC | \ 335 MNT_NOSUID | MNT_UNION | MNT_SUJ | \ 336 MNT_ASYNC | MNT_EXRDONLY | MNT_EXPORTED | \ 337 MNT_DEFEXPORTED | MNT_EXPORTANON| MNT_EXKERB | \ 338 MNT_LOCAL | MNT_USER | MNT_QUOTA | \ 339 MNT_ROOTFS | MNT_NOATIME | MNT_NOCLUSTERR| \ 340 MNT_NOCLUSTERW | MNT_SUIDDIR | MNT_SOFTDEP | \ 341 MNT_IGNORE | MNT_EXPUBLIC | MNT_NOSYMFOLLOW | \ 342 MNT_GJOURNAL | MNT_MULTILABEL | MNT_ACLS | \ 343 MNT_NFS4ACLS | MNT_AUTOMOUNTED | MNT_VERIFIED | \ 344 MNT_UNTRUSTED) 345 346 /* Mask of flags that can be updated. */ 347 #define MNT_UPDATEMASK (MNT_NOSUID | MNT_NOEXEC | \ 348 MNT_SYNCHRONOUS | MNT_UNION | MNT_ASYNC | \ 349 MNT_NOATIME | \ 350 MNT_NOSYMFOLLOW | MNT_IGNORE | \ 351 MNT_NOCLUSTERR | MNT_NOCLUSTERW | MNT_SUIDDIR | \ 352 MNT_ACLS | MNT_USER | MNT_NFS4ACLS | \ 353 MNT_AUTOMOUNTED | MNT_UNTRUSTED) 354 355 /* 356 * External filesystem command modifier flags. 357 * Unmount can use the MNT_FORCE flag. 358 * XXX: These are not STATES and really should be somewhere else. 359 * XXX: MNT_BYFSID and MNT_NONBUSY collide with MNT_ACLS and MNT_MULTILABEL, 360 * but because MNT_ACLS and MNT_MULTILABEL are only used for mount(2), 361 * and MNT_BYFSID and MNT_NONBUSY are only used for unmount(2), 362 * it's harmless. 363 */ 364 #define MNT_UPDATE 0x0000000000010000ULL /* not real mount, just update */ 365 #define MNT_DELEXPORT 0x0000000000020000ULL /* delete export host lists */ 366 #define MNT_RELOAD 0x0000000000040000ULL /* reload filesystem data */ 367 #define MNT_FORCE 0x0000000000080000ULL /* force unmount or readonly */ 368 #define MNT_SNAPSHOT 0x0000000001000000ULL /* snapshot the filesystem */ 369 #define MNT_NONBUSY 0x0000000004000000ULL /* check vnode use counts. */ 370 #define MNT_BYFSID 0x0000000008000000ULL /* specify filesystem by ID. */ 371 #define MNT_CMDFLAGS (MNT_UPDATE | MNT_DELEXPORT | MNT_RELOAD | \ 372 MNT_FORCE | MNT_SNAPSHOT | MNT_NONBUSY | \ 373 MNT_BYFSID) 374 /* 375 * Internal filesystem control flags stored in mnt_kern_flag. 376 * 377 * MNTK_UNMOUNT locks the mount entry so that name lookup cannot 378 * proceed past the mount point. This keeps the subtree stable during 379 * mounts and unmounts. When non-forced unmount flushes all vnodes 380 * from the mp queue, the MNTK_UNMOUNT flag prevents insmntque() from 381 * queueing new vnodes. 382 * 383 * MNTK_UNMOUNTF permits filesystems to detect a forced unmount while 384 * dounmount() is still waiting to lock the mountpoint. This allows 385 * the filesystem to cancel operations that might otherwise deadlock 386 * with the unmount attempt (used by NFS). 387 */ 388 #define MNTK_UNMOUNTF 0x00000001 /* forced unmount in progress */ 389 #define MNTK_ASYNC 0x00000002 /* filtered async flag */ 390 #define MNTK_SOFTDEP 0x00000004 /* async disabled by softdep */ 391 #define MNTK_DRAINING 0x00000010 /* lock draining is happening */ 392 #define MNTK_REFEXPIRE 0x00000020 /* refcount expiring is happening */ 393 #define MNTK_EXTENDED_SHARED 0x00000040 /* Allow shared locking for more ops */ 394 #define MNTK_SHARED_WRITES 0x00000080 /* Allow shared locking for writes */ 395 #define MNTK_NO_IOPF 0x00000100 /* Disallow page faults during reads 396 and writes. Filesystem shall properly 397 handle i/o state on EFAULT. */ 398 #define MNTK_VGONE_UPPER 0x00000200 399 #define MNTK_VGONE_WAITER 0x00000400 400 #define MNTK_LOOKUP_EXCL_DOTDOT 0x00000800 401 #define MNTK_MARKER 0x00001000 402 #define MNTK_UNMAPPED_BUFS 0x00002000 403 #define MNTK_USES_BCACHE 0x00004000 /* FS uses the buffer cache. */ 404 #define MNTK_TEXT_REFS 0x00008000 /* Keep use ref for text */ 405 #define MNTK_VMSETSIZE_BUG 0x00010000 406 #define MNTK_SUSPEND_ALL 0x00080000 /* Suspended by all-fs suspension */ 407 #define MNTK_NOASYNC 0x00800000 /* disable async */ 408 #define MNTK_UNMOUNT 0x01000000 /* unmount in progress */ 409 #define MNTK_MWAIT 0x02000000 /* waiting for unmount to finish */ 410 #define MNTK_SUSPEND 0x08000000 /* request write suspension */ 411 #define MNTK_SUSPEND2 0x04000000 /* block secondary writes */ 412 #define MNTK_SUSPENDED 0x10000000 /* write operations are suspended */ 413 #define MNTK_NULL_NOCACHE 0x20000000 /* auto disable cache for nullfs 414 mounts over this fs */ 415 #define MNTK_LOOKUP_SHARED 0x40000000 /* FS supports shared lock lookups */ 416 #define MNTK_NOKNOTE 0x80000000 /* Don't send KNOTEs from VOP hooks */ 417 418 #ifdef _KERNEL 419 static inline int 420 MNT_SHARED_WRITES(struct mount *mp) 421 { 422 423 return (mp != NULL && (mp->mnt_kern_flag & MNTK_SHARED_WRITES) != 0); 424 } 425 426 static inline int 427 MNT_EXTENDED_SHARED(struct mount *mp) 428 { 429 430 return (mp != NULL && (mp->mnt_kern_flag & MNTK_EXTENDED_SHARED) != 0); 431 } 432 #endif 433 434 /* 435 * Sysctl CTL_VFS definitions. 436 * 437 * Second level identifier specifies which filesystem. Second level 438 * identifier VFS_VFSCONF returns information about all filesystems. 439 * Second level identifier VFS_GENERIC is non-terminal. 440 */ 441 #define VFS_VFSCONF 0 /* get configured filesystems */ 442 #define VFS_GENERIC 0 /* generic filesystem information */ 443 /* 444 * Third level identifiers for VFS_GENERIC are given below; third 445 * level identifiers for specific filesystems are given in their 446 * mount specific header files. 447 */ 448 #define VFS_MAXTYPENUM 1 /* int: highest defined filesystem type */ 449 #define VFS_CONF 2 /* struct: vfsconf for filesystem given 450 as next argument */ 451 452 /* 453 * Flags for various system call interfaces. 454 * 455 * waitfor flags to vfs_sync() and getfsstat() 456 */ 457 #define MNT_WAIT 1 /* synchronously wait for I/O to complete */ 458 #define MNT_NOWAIT 2 /* start all I/O, but do not wait for it */ 459 #define MNT_LAZY 3 /* push data not written by filesystem syncer */ 460 #define MNT_SUSPEND 4 /* Suspend file system after sync */ 461 462 /* 463 * Generic file handle 464 */ 465 struct fhandle { 466 fsid_t fh_fsid; /* Filesystem id of mount point */ 467 struct fid fh_fid; /* Filesys specific id */ 468 }; 469 typedef struct fhandle fhandle_t; 470 471 /* 472 * Old export arguments without security flavor list 473 */ 474 struct oexport_args { 475 int ex_flags; /* export related flags */ 476 uid_t ex_root; /* mapping for root uid */ 477 struct xucred ex_anon; /* mapping for anonymous user */ 478 struct sockaddr *ex_addr; /* net address to which exported */ 479 u_char ex_addrlen; /* and the net address length */ 480 struct sockaddr *ex_mask; /* mask of valid bits in saddr */ 481 u_char ex_masklen; /* and the smask length */ 482 char *ex_indexfile; /* index file for WebNFS URLs */ 483 }; 484 485 /* 486 * Export arguments for local filesystem mount calls. 487 */ 488 #define MAXSECFLAVORS 5 489 struct export_args { 490 int ex_flags; /* export related flags */ 491 uid_t ex_root; /* mapping for root uid */ 492 struct xucred ex_anon; /* mapping for anonymous user */ 493 struct sockaddr *ex_addr; /* net address to which exported */ 494 u_char ex_addrlen; /* and the net address length */ 495 struct sockaddr *ex_mask; /* mask of valid bits in saddr */ 496 u_char ex_masklen; /* and the smask length */ 497 char *ex_indexfile; /* index file for WebNFS URLs */ 498 int ex_numsecflavors; /* security flavor count */ 499 int ex_secflavors[MAXSECFLAVORS]; /* list of security flavors */ 500 }; 501 502 /* 503 * Structure holding information for a publicly exported filesystem 504 * (WebNFS). Currently the specs allow just for one such filesystem. 505 */ 506 struct nfs_public { 507 int np_valid; /* Do we hold valid information */ 508 fhandle_t np_handle; /* Filehandle for pub fs (internal) */ 509 struct mount *np_mount; /* Mountpoint of exported fs */ 510 char *np_index; /* Index file */ 511 }; 512 513 /* 514 * Filesystem configuration information. One of these exists for each 515 * type of filesystem supported by the kernel. These are searched at 516 * mount time to identify the requested filesystem. 517 * 518 * XXX: Never change the first two arguments! 519 */ 520 struct vfsconf { 521 u_int vfc_version; /* ABI version number */ 522 char vfc_name[MFSNAMELEN]; /* filesystem type name */ 523 struct vfsops *vfc_vfsops; /* filesystem operations vector */ 524 int vfc_typenum; /* historic filesystem type number */ 525 int vfc_refcount; /* number mounted of this type */ 526 int vfc_flags; /* permanent flags */ 527 int vfc_prison_flag; /* prison allow.mount.* flag */ 528 struct vfsoptdecl *vfc_opts; /* mount options */ 529 TAILQ_ENTRY(vfsconf) vfc_list; /* list of vfscons */ 530 }; 531 532 /* Userland version of the struct vfsconf. */ 533 struct xvfsconf { 534 struct vfsops *vfc_vfsops; /* filesystem operations vector */ 535 char vfc_name[MFSNAMELEN]; /* filesystem type name */ 536 int vfc_typenum; /* historic filesystem type number */ 537 int vfc_refcount; /* number mounted of this type */ 538 int vfc_flags; /* permanent flags */ 539 struct vfsconf *vfc_next; /* next in list */ 540 }; 541 542 #ifndef BURN_BRIDGES 543 struct ovfsconf { 544 void *vfc_vfsops; 545 char vfc_name[32]; 546 int vfc_index; 547 int vfc_refcount; 548 int vfc_flags; 549 }; 550 #endif 551 552 /* 553 * NB: these flags refer to IMPLEMENTATION properties, not properties of 554 * any actual mounts; i.e., it does not make sense to change the flags. 555 */ 556 #define VFCF_STATIC 0x00010000 /* statically compiled into kernel */ 557 #define VFCF_NETWORK 0x00020000 /* may get data over the network */ 558 #define VFCF_READONLY 0x00040000 /* writes are not implemented */ 559 #define VFCF_SYNTHETIC 0x00080000 /* data does not represent real files */ 560 #define VFCF_LOOPBACK 0x00100000 /* aliases some other mounted FS */ 561 #define VFCF_UNICODE 0x00200000 /* stores file names as Unicode */ 562 #define VFCF_JAIL 0x00400000 /* can be mounted from within a jail */ 563 #define VFCF_DELEGADMIN 0x00800000 /* supports delegated administration */ 564 #define VFCF_SBDRY 0x01000000 /* Stop at Boundary: defer stop requests 565 to kernel->user (AST) transition */ 566 567 typedef uint32_t fsctlop_t; 568 569 struct vfsidctl { 570 int vc_vers; /* should be VFSIDCTL_VERS1 (below) */ 571 fsid_t vc_fsid; /* fsid to operate on */ 572 char vc_fstypename[MFSNAMELEN]; 573 /* type of fs 'nfs' or '*' */ 574 fsctlop_t vc_op; /* operation VFS_CTL_* (below) */ 575 void *vc_ptr; /* pointer to data structure */ 576 size_t vc_len; /* sizeof said structure */ 577 u_int32_t vc_spare[12]; /* spare (must be zero) */ 578 }; 579 580 /* vfsidctl API version. */ 581 #define VFS_CTL_VERS1 0x01 582 583 /* 584 * New style VFS sysctls, do not reuse/conflict with the namespace for 585 * private sysctls. 586 * All "global" sysctl ops have the 33rd bit set: 587 * 0x...1.... 588 * Private sysctl ops should have the 33rd bit unset. 589 */ 590 #define VFS_CTL_QUERY 0x00010001 /* anything wrong? (vfsquery) */ 591 #define VFS_CTL_TIMEO 0x00010002 /* set timeout for vfs notification */ 592 #define VFS_CTL_NOLOCKS 0x00010003 /* disable file locking */ 593 594 struct vfsquery { 595 u_int32_t vq_flags; 596 u_int32_t vq_spare[31]; 597 }; 598 599 /* vfsquery flags */ 600 #define VQ_NOTRESP 0x0001 /* server down */ 601 #define VQ_NEEDAUTH 0x0002 /* server bad auth */ 602 #define VQ_LOWDISK 0x0004 /* we're low on space */ 603 #define VQ_MOUNT 0x0008 /* new filesystem arrived */ 604 #define VQ_UNMOUNT 0x0010 /* filesystem has left */ 605 #define VQ_DEAD 0x0020 /* filesystem is dead, needs force unmount */ 606 #define VQ_ASSIST 0x0040 /* filesystem needs assistance from external 607 program */ 608 #define VQ_NOTRESPLOCK 0x0080 /* server lockd down */ 609 #define VQ_FLAG0100 0x0100 /* placeholder */ 610 #define VQ_FLAG0200 0x0200 /* placeholder */ 611 #define VQ_FLAG0400 0x0400 /* placeholder */ 612 #define VQ_FLAG0800 0x0800 /* placeholder */ 613 #define VQ_FLAG1000 0x1000 /* placeholder */ 614 #define VQ_FLAG2000 0x2000 /* placeholder */ 615 #define VQ_FLAG4000 0x4000 /* placeholder */ 616 #define VQ_FLAG8000 0x8000 /* placeholder */ 617 618 #ifdef _KERNEL 619 /* Point a sysctl request at a vfsidctl's data. */ 620 #define VCTLTOREQ(vc, req) \ 621 do { \ 622 (req)->newptr = (vc)->vc_ptr; \ 623 (req)->newlen = (vc)->vc_len; \ 624 (req)->newidx = 0; \ 625 } while (0) 626 #endif 627 628 struct iovec; 629 struct uio; 630 631 #ifdef _KERNEL 632 633 /* 634 * vfs_busy specific flags and mask. 635 */ 636 #define MBF_NOWAIT 0x01 637 #define MBF_MNTLSTLOCK 0x02 638 #define MBF_MASK (MBF_NOWAIT | MBF_MNTLSTLOCK) 639 640 #ifdef MALLOC_DECLARE 641 MALLOC_DECLARE(M_MOUNT); 642 MALLOC_DECLARE(M_STATFS); 643 #endif 644 extern int maxvfsconf; /* highest defined filesystem type */ 645 646 TAILQ_HEAD(vfsconfhead, vfsconf); 647 extern struct vfsconfhead vfsconf; 648 649 /* 650 * Operations supported on mounted filesystem. 651 */ 652 struct mount_args; 653 struct nameidata; 654 struct sysctl_req; 655 struct mntarg; 656 657 typedef int vfs_cmount_t(struct mntarg *ma, void *data, uint64_t flags); 658 typedef int vfs_unmount_t(struct mount *mp, int mntflags); 659 typedef int vfs_root_t(struct mount *mp, int flags, struct vnode **vpp); 660 typedef int vfs_quotactl_t(struct mount *mp, int cmds, uid_t uid, void *arg); 661 typedef int vfs_statfs_t(struct mount *mp, struct statfs *sbp); 662 typedef int vfs_sync_t(struct mount *mp, int waitfor); 663 typedef int vfs_vget_t(struct mount *mp, ino_t ino, int flags, 664 struct vnode **vpp); 665 typedef int vfs_fhtovp_t(struct mount *mp, struct fid *fhp, 666 int flags, struct vnode **vpp); 667 typedef int vfs_checkexp_t(struct mount *mp, struct sockaddr *nam, 668 int *extflagsp, struct ucred **credanonp, 669 int *numsecflavors, int **secflavors); 670 typedef int vfs_init_t(struct vfsconf *); 671 typedef int vfs_uninit_t(struct vfsconf *); 672 typedef int vfs_extattrctl_t(struct mount *mp, int cmd, 673 struct vnode *filename_vp, int attrnamespace, 674 const char *attrname); 675 typedef int vfs_mount_t(struct mount *mp); 676 typedef int vfs_sysctl_t(struct mount *mp, fsctlop_t op, 677 struct sysctl_req *req); 678 typedef void vfs_susp_clean_t(struct mount *mp); 679 typedef void vfs_notify_lowervp_t(struct mount *mp, struct vnode *lowervp); 680 typedef void vfs_purge_t(struct mount *mp); 681 682 struct vfsops { 683 vfs_mount_t *vfs_mount; 684 vfs_cmount_t *vfs_cmount; 685 vfs_unmount_t *vfs_unmount; 686 vfs_root_t *vfs_root; 687 vfs_quotactl_t *vfs_quotactl; 688 vfs_statfs_t *vfs_statfs; 689 vfs_sync_t *vfs_sync; 690 vfs_vget_t *vfs_vget; 691 vfs_fhtovp_t *vfs_fhtovp; 692 vfs_checkexp_t *vfs_checkexp; 693 vfs_init_t *vfs_init; 694 vfs_uninit_t *vfs_uninit; 695 vfs_extattrctl_t *vfs_extattrctl; 696 vfs_sysctl_t *vfs_sysctl; 697 vfs_susp_clean_t *vfs_susp_clean; 698 vfs_notify_lowervp_t *vfs_reclaim_lowervp; 699 vfs_notify_lowervp_t *vfs_unlink_lowervp; 700 vfs_purge_t *vfs_purge; 701 vfs_mount_t *vfs_spare[6]; /* spares for ABI compat */ 702 }; 703 704 vfs_statfs_t __vfs_statfs; 705 706 #define VFS_PROLOGUE(MP) do { \ 707 struct mount *mp__; \ 708 int _prev_stops; \ 709 \ 710 mp__ = (MP); \ 711 _prev_stops = sigdeferstop((mp__ != NULL && \ 712 (mp__->mnt_vfc->vfc_flags & VFCF_SBDRY) != 0) ? \ 713 SIGDEFERSTOP_SILENT : SIGDEFERSTOP_NOP); 714 715 #define VFS_EPILOGUE(MP) \ 716 sigallowstop(_prev_stops); \ 717 } while (0) 718 719 #define VFS_MOUNT(MP) ({ \ 720 int _rc; \ 721 \ 722 TSRAW(curthread, TS_ENTER, "VFS_MOUNT", (MP)->mnt_vfc->vfc_name);\ 723 VFS_PROLOGUE(MP); \ 724 _rc = (*(MP)->mnt_op->vfs_mount)(MP); \ 725 VFS_EPILOGUE(MP); \ 726 TSRAW(curthread, TS_EXIT, "VFS_MOUNT", (MP)->mnt_vfc->vfc_name);\ 727 _rc; }) 728 729 #define VFS_UNMOUNT(MP, FORCE) ({ \ 730 int _rc; \ 731 \ 732 VFS_PROLOGUE(MP); \ 733 _rc = (*(MP)->mnt_op->vfs_unmount)(MP, FORCE); \ 734 VFS_EPILOGUE(MP); \ 735 _rc; }) 736 737 #define VFS_ROOT(MP, FLAGS, VPP) ({ \ 738 int _rc; \ 739 \ 740 VFS_PROLOGUE(MP); \ 741 _rc = (*(MP)->mnt_op->vfs_root)(MP, FLAGS, VPP); \ 742 VFS_EPILOGUE(MP); \ 743 _rc; }) 744 745 #define VFS_QUOTACTL(MP, C, U, A) ({ \ 746 int _rc; \ 747 \ 748 VFS_PROLOGUE(MP); \ 749 _rc = (*(MP)->mnt_op->vfs_quotactl)(MP, C, U, A); \ 750 VFS_EPILOGUE(MP); \ 751 _rc; }) 752 753 #define VFS_STATFS(MP, SBP) ({ \ 754 int _rc; \ 755 \ 756 VFS_PROLOGUE(MP); \ 757 _rc = __vfs_statfs((MP), (SBP)); \ 758 VFS_EPILOGUE(MP); \ 759 _rc; }) 760 761 #define VFS_SYNC(MP, WAIT) ({ \ 762 int _rc; \ 763 \ 764 VFS_PROLOGUE(MP); \ 765 _rc = (*(MP)->mnt_op->vfs_sync)(MP, WAIT); \ 766 VFS_EPILOGUE(MP); \ 767 _rc; }) 768 769 #define VFS_VGET(MP, INO, FLAGS, VPP) ({ \ 770 int _rc; \ 771 \ 772 VFS_PROLOGUE(MP); \ 773 _rc = (*(MP)->mnt_op->vfs_vget)(MP, INO, FLAGS, VPP); \ 774 VFS_EPILOGUE(MP); \ 775 _rc; }) 776 777 #define VFS_FHTOVP(MP, FIDP, FLAGS, VPP) ({ \ 778 int _rc; \ 779 \ 780 VFS_PROLOGUE(MP); \ 781 _rc = (*(MP)->mnt_op->vfs_fhtovp)(MP, FIDP, FLAGS, VPP); \ 782 VFS_EPILOGUE(MP); \ 783 _rc; }) 784 785 #define VFS_CHECKEXP(MP, NAM, EXFLG, CRED, NUMSEC, SEC) ({ \ 786 int _rc; \ 787 \ 788 VFS_PROLOGUE(MP); \ 789 _rc = (*(MP)->mnt_op->vfs_checkexp)(MP, NAM, EXFLG, CRED, NUMSEC,\ 790 SEC); \ 791 VFS_EPILOGUE(MP); \ 792 _rc; }) 793 794 #define VFS_EXTATTRCTL(MP, C, FN, NS, N) ({ \ 795 int _rc; \ 796 \ 797 VFS_PROLOGUE(MP); \ 798 _rc = (*(MP)->mnt_op->vfs_extattrctl)(MP, C, FN, NS, N); \ 799 VFS_EPILOGUE(MP); \ 800 _rc; }) 801 802 #define VFS_SYSCTL(MP, OP, REQ) ({ \ 803 int _rc; \ 804 \ 805 VFS_PROLOGUE(MP); \ 806 _rc = (*(MP)->mnt_op->vfs_sysctl)(MP, OP, REQ); \ 807 VFS_EPILOGUE(MP); \ 808 _rc; }) 809 810 #define VFS_SUSP_CLEAN(MP) do { \ 811 if (*(MP)->mnt_op->vfs_susp_clean != NULL) { \ 812 VFS_PROLOGUE(MP); \ 813 (*(MP)->mnt_op->vfs_susp_clean)(MP); \ 814 VFS_EPILOGUE(MP); \ 815 } \ 816 } while (0) 817 818 #define VFS_RECLAIM_LOWERVP(MP, VP) do { \ 819 if (*(MP)->mnt_op->vfs_reclaim_lowervp != NULL) { \ 820 VFS_PROLOGUE(MP); \ 821 (*(MP)->mnt_op->vfs_reclaim_lowervp)((MP), (VP)); \ 822 VFS_EPILOGUE(MP); \ 823 } \ 824 } while (0) 825 826 #define VFS_UNLINK_LOWERVP(MP, VP) do { \ 827 if (*(MP)->mnt_op->vfs_unlink_lowervp != NULL) { \ 828 VFS_PROLOGUE(MP); \ 829 (*(MP)->mnt_op->vfs_unlink_lowervp)((MP), (VP)); \ 830 VFS_EPILOGUE(MP); \ 831 } \ 832 } while (0) 833 834 #define VFS_PURGE(MP) do { \ 835 if (*(MP)->mnt_op->vfs_purge != NULL) { \ 836 VFS_PROLOGUE(MP); \ 837 (*(MP)->mnt_op->vfs_purge)(MP); \ 838 VFS_EPILOGUE(MP); \ 839 } \ 840 } while (0) 841 842 #define VFS_KNOTE_LOCKED(vp, hint) do \ 843 { \ 844 if (((vp)->v_vflag & VV_NOKNOTE) == 0) \ 845 VN_KNOTE((vp), (hint), KNF_LISTLOCKED); \ 846 } while (0) 847 848 #define VFS_KNOTE_UNLOCKED(vp, hint) do \ 849 { \ 850 if (((vp)->v_vflag & VV_NOKNOTE) == 0) \ 851 VN_KNOTE((vp), (hint), 0); \ 852 } while (0) 853 854 #define VFS_NOTIFY_UPPER_RECLAIM 1 855 #define VFS_NOTIFY_UPPER_UNLINK 2 856 857 #include <sys/module.h> 858 859 /* 860 * Version numbers. 861 */ 862 #define VFS_VERSION_00 0x19660120 863 #define VFS_VERSION_01 0x20121030 864 #define VFS_VERSION_02 0x20180504 865 #define VFS_VERSION VFS_VERSION_02 866 867 #define VFS_SET(vfsops, fsname, flags) \ 868 static struct vfsconf fsname ## _vfsconf = { \ 869 .vfc_version = VFS_VERSION, \ 870 .vfc_name = #fsname, \ 871 .vfc_vfsops = &vfsops, \ 872 .vfc_typenum = -1, \ 873 .vfc_flags = flags, \ 874 }; \ 875 static moduledata_t fsname ## _mod = { \ 876 #fsname, \ 877 vfs_modevent, \ 878 & fsname ## _vfsconf \ 879 }; \ 880 DECLARE_MODULE(fsname, fsname ## _mod, SI_SUB_VFS, SI_ORDER_MIDDLE) 881 882 /* 883 * exported vnode operations 884 */ 885 886 int dounmount(struct mount *, int, struct thread *); 887 888 int kernel_mount(struct mntarg *ma, uint64_t flags); 889 int kernel_vmount(int flags, ...); 890 struct mntarg *mount_arg(struct mntarg *ma, const char *name, const void *val, int len); 891 struct mntarg *mount_argb(struct mntarg *ma, int flag, const char *name); 892 struct mntarg *mount_argf(struct mntarg *ma, const char *name, const char *fmt, ...); 893 struct mntarg *mount_argsu(struct mntarg *ma, const char *name, const void *val, int len); 894 void statfs_scale_blocks(struct statfs *sf, long max_size); 895 struct vfsconf *vfs_byname(const char *); 896 struct vfsconf *vfs_byname_kld(const char *, struct thread *td, int *); 897 void vfs_mount_destroy(struct mount *); 898 void vfs_event_signal(fsid_t *, u_int32_t, intptr_t); 899 void vfs_freeopts(struct vfsoptlist *opts); 900 void vfs_deleteopt(struct vfsoptlist *opts, const char *name); 901 int vfs_buildopts(struct uio *auio, struct vfsoptlist **options); 902 int vfs_flagopt(struct vfsoptlist *opts, const char *name, uint64_t *w, 903 uint64_t val); 904 int vfs_getopt(struct vfsoptlist *, const char *, void **, int *); 905 int vfs_getopt_pos(struct vfsoptlist *opts, const char *name); 906 int vfs_getopt_size(struct vfsoptlist *opts, const char *name, 907 off_t *value); 908 char *vfs_getopts(struct vfsoptlist *, const char *, int *error); 909 int vfs_copyopt(struct vfsoptlist *, const char *, void *, int); 910 int vfs_filteropt(struct vfsoptlist *, const char **legal); 911 void vfs_opterror(struct vfsoptlist *opts, const char *fmt, ...); 912 int vfs_scanopt(struct vfsoptlist *opts, const char *name, const char *fmt, ...); 913 int vfs_setopt(struct vfsoptlist *opts, const char *name, void *value, 914 int len); 915 int vfs_setopt_part(struct vfsoptlist *opts, const char *name, void *value, 916 int len); 917 int vfs_setopts(struct vfsoptlist *opts, const char *name, 918 const char *value); 919 int vfs_setpublicfs /* set publicly exported fs */ 920 (struct mount *, struct netexport *, struct export_args *); 921 void vfs_msync(struct mount *, int); 922 int vfs_busy(struct mount *, int); 923 int vfs_export /* process mount export info */ 924 (struct mount *, struct export_args *); 925 void vfs_allocate_syncvnode(struct mount *); 926 void vfs_deallocate_syncvnode(struct mount *); 927 int vfs_donmount(struct thread *td, uint64_t fsflags, 928 struct uio *fsoptions); 929 void vfs_getnewfsid(struct mount *); 930 struct cdev *vfs_getrootfsid(struct mount *); 931 struct mount *vfs_getvfs(fsid_t *); /* return vfs given fsid */ 932 struct mount *vfs_busyfs(fsid_t *); 933 int vfs_modevent(module_t, int, void *); 934 void vfs_mount_error(struct mount *, const char *, ...); 935 void vfs_mountroot(void); /* mount our root filesystem */ 936 void vfs_mountedfrom(struct mount *, const char *from); 937 void vfs_notify_upper(struct vnode *, int); 938 void vfs_oexport_conv(const struct oexport_args *oexp, 939 struct export_args *exp); 940 void vfs_ref(struct mount *); 941 void vfs_rel(struct mount *); 942 struct mount *vfs_mount_alloc(struct vnode *, struct vfsconf *, const char *, 943 struct ucred *); 944 int vfs_suser(struct mount *, struct thread *); 945 void vfs_unbusy(struct mount *); 946 void vfs_unmountall(void); 947 extern TAILQ_HEAD(mntlist, mount) mountlist; /* mounted filesystem list */ 948 extern struct mtx mountlist_mtx; 949 extern struct nfs_public nfs_pub; 950 extern struct sx vfsconf_sx; 951 #define vfsconf_lock() sx_xlock(&vfsconf_sx) 952 #define vfsconf_unlock() sx_xunlock(&vfsconf_sx) 953 #define vfsconf_slock() sx_slock(&vfsconf_sx) 954 #define vfsconf_sunlock() sx_sunlock(&vfsconf_sx) 955 956 /* 957 * Declarations for these vfs default operations are located in 958 * kern/vfs_default.c. They will be automatically used to replace 959 * null entries in VFS ops tables when registering a new filesystem 960 * type in the global table. 961 */ 962 vfs_root_t vfs_stdroot; 963 vfs_quotactl_t vfs_stdquotactl; 964 vfs_statfs_t vfs_stdstatfs; 965 vfs_sync_t vfs_stdsync; 966 vfs_sync_t vfs_stdnosync; 967 vfs_vget_t vfs_stdvget; 968 vfs_fhtovp_t vfs_stdfhtovp; 969 vfs_checkexp_t vfs_stdcheckexp; 970 vfs_init_t vfs_stdinit; 971 vfs_uninit_t vfs_stduninit; 972 vfs_extattrctl_t vfs_stdextattrctl; 973 vfs_sysctl_t vfs_stdsysctl; 974 975 void syncer_suspend(void); 976 void syncer_resume(void); 977 978 void suspend_all_fs(void); 979 void resume_all_fs(void); 980 981 #else /* !_KERNEL */ 982 983 #include <sys/cdefs.h> 984 985 struct stat; 986 987 __BEGIN_DECLS 988 int fhlink(struct fhandle *, const char *); 989 int fhlinkat(struct fhandle *, int, const char *); 990 int fhopen(const struct fhandle *, int); 991 int fhreadlink(struct fhandle *, char *, size_t); 992 int fhstat(const struct fhandle *, struct stat *); 993 int fhstatfs(const struct fhandle *, struct statfs *); 994 int fstatfs(int, struct statfs *); 995 int getfh(const char *, fhandle_t *); 996 int getfhat(int, char *, struct fhandle *, int); 997 int getfsstat(struct statfs *, long, int); 998 int getmntinfo(struct statfs **, int); 999 int lgetfh(const char *, fhandle_t *); 1000 int mount(const char *, const char *, int, void *); 1001 int nmount(struct iovec *, unsigned int, int); 1002 int statfs(const char *, struct statfs *); 1003 int unmount(const char *, int); 1004 1005 /* C library stuff */ 1006 int getvfsbyname(const char *, struct xvfsconf *); 1007 __END_DECLS 1008 1009 #endif /* _KERNEL */ 1010 1011 #endif /* !_SYS_MOUNT_H_ */
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