| 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. Neither the name of the University nor the names of its contributors |
| 14 | * may be used to endorse or promote products derived from this software |
| 15 | * without specific prior written permission. |
| 16 | * |
| 17 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND |
| 18 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| 19 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| 20 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE |
| 21 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
| 22 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
| 23 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| 24 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
| 25 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
| 26 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| 27 | * SUCH DAMAGE. |
| 28 | * |
| 29 | * @(#)mount.h 8.21 (Berkeley) 5/20/95 |
| 30 | * $FreeBSD: src/sys/sys/mount.h,v 1.89.2.7 2003/04/04 20:35:57 tegge Exp $ |
| 31 | */ |
| 32 | |
| 33 | #ifndef _SYS_MOUNT_H_ |
| 34 | #define _SYS_MOUNT_H_ |
| 35 | |
| 36 | #include <sys/cdefs.h> |
| 37 | #include <sys/queue.h> |
| 38 | #include <sys/tree.h> |
| 39 | #include <sys/ucred.h> |
| 40 | |
| 41 | #ifndef _KERNEL |
| 42 | #if __BSD_VISIBLE |
| 43 | #include <sys/stat.h> |
| 44 | #endif /* __BSD_VISIBLE */ |
| 45 | #endif /* !_KERNEL */ |
| 46 | |
| 47 | #if defined(_KERNEL) || defined(_KERNEL_STRUCTURES) |
| 48 | #ifndef _SYS_LOCK_H_ |
| 49 | #include <sys/lock.h> |
| 50 | #endif |
| 51 | #ifndef _SYS_NAMECACHE_H_ |
| 52 | #include <sys/namecache.h> |
| 53 | #endif |
| 54 | #ifndef _SYS_STATVFS_H_ |
| 55 | #include <sys/statvfs.h> |
| 56 | #endif |
| 57 | #ifndef _SYS_THREAD_H_ |
| 58 | #include <sys/thread.h> |
| 59 | #endif |
| 60 | #include <sys/vfs_quota.h> |
| 61 | #include <sys/mplock2.h> |
| 62 | #endif |
| 63 | |
| 64 | struct thread; |
| 65 | struct journal; |
| 66 | struct vop_ops; |
| 67 | struct vop_mountctl_args; |
| 68 | struct statvfs; |
| 69 | struct vmntvnodescan_info; |
| 70 | |
| 71 | typedef struct fsid { int32_t val[2]; } fsid_t; /* file system id type */ |
| 72 | |
| 73 | #define fsidcmp(a, b) memcmp((a), (b), sizeof(fsid_t)) |
| 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 | } __packed; |
| 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 | #endif |
| 146 | |
| 147 | /* |
| 148 | * vfs quota accounting |
| 149 | * |
| 150 | * uids and gids often come in contiguous blocks; use a small linear |
| 151 | * array as the basic in-memory accounting allocation unit |
| 152 | */ |
| 153 | #define ACCT_CHUNK_BITS 5 |
| 154 | #define ACCT_CHUNK_NIDS (1<<ACCT_CHUNK_BITS) |
| 155 | #define ACCT_CHUNK_MASK (ACCT_CHUNK_NIDS - 1) |
| 156 | |
| 157 | struct ac_counters { |
| 158 | uint64_t space; |
| 159 | uint64_t limit; |
| 160 | }; |
| 161 | |
| 162 | struct ac_unode { |
| 163 | RB_ENTRY(ac_unode) rb_entry; |
| 164 | uid_t left_bits; |
| 165 | struct ac_counters uid_chunk[ACCT_CHUNK_NIDS]; |
| 166 | }; |
| 167 | |
| 168 | struct ac_gnode { |
| 169 | RB_ENTRY(ac_gnode) rb_entry; |
| 170 | gid_t left_bits; |
| 171 | struct ac_counters gid_chunk[ACCT_CHUNK_NIDS]; |
| 172 | }; |
| 173 | |
| 174 | #if defined(_KERNEL) || defined(_KERNEL_STRUCTURES) |
| 175 | |
| 176 | struct vfs_acct { |
| 177 | RB_HEAD(ac_utree,ac_unode) ac_uroot; |
| 178 | RB_HEAD(ac_gtree,ac_gnode) ac_groot; |
| 179 | uint64_t ac_bytes; /* total bytes used */ |
| 180 | uint64_t ac_limit; |
| 181 | struct spinlock ac_spin; /* protective spinlock */ |
| 182 | }; |
| 183 | |
| 184 | |
| 185 | /* |
| 186 | * Structure per mounted file system. Each mounted file system has an |
| 187 | * array of operations and an instance record. The file systems are |
| 188 | * put on a doubly linked list. |
| 189 | * |
| 190 | * NOTE: mnt_nvnodelist and mnt_reservedvnlist. At the moment vnodes |
| 191 | * are linked into mnt_nvnodelist. At some point in the near future the |
| 192 | * vnode list will be split into a 'dirty' and 'clean' list. mnt_nvnodelist |
| 193 | * will become the dirty list and mnt_reservedvnlist will become the 'clean' |
| 194 | * list. Filesystem kld's syncing code should remain compatible since |
| 195 | * they only need to scan the dirty vnode list (nvnodelist -> dirtyvnodelist). |
| 196 | * |
| 197 | * NOTE: All VFSs must at least populate mnt_vn_ops or those VOP ops that |
| 198 | * only take namecache pointers will not be able to find their operations |
| 199 | * vector via namecache->nc_mount. |
| 200 | * |
| 201 | * MPSAFE NOTES: mnt_lock interlocks mounting and unmounting operations. |
| 202 | * |
| 203 | * mnt_token interlocks operations which adjust the mount |
| 204 | * structure and will also be held through VFS operations |
| 205 | * for VFSes not flagged MPSAFE. |
| 206 | * |
| 207 | * The VFS should pre-set VFCF_MPSAFE in the VFS_SET() to |
| 208 | * avoid use of the mplock during mounting. This will also |
| 209 | * cause MNTK_ALL_MPSAFE to be set in mnt_kern_flags. If the |
| 210 | * VFS does not set VFCF_MPSAFE then it can set individual |
| 211 | * MNTK_*_MPSAFE flags in mnt_kern_flags. |
| 212 | */ |
| 213 | TAILQ_HEAD(vnodelst, vnode); |
| 214 | TAILQ_HEAD(journallst, journal); |
| 215 | |
| 216 | struct mount { |
| 217 | TAILQ_ENTRY(mount) mnt_list; /* mount list */ |
| 218 | struct vfsops *mnt_op; /* operations on fs */ |
| 219 | struct vfsconf *mnt_vfc; /* configuration info */ |
| 220 | u_int mnt_namecache_gen; /* ++ to clear negative hits */ |
| 221 | u_int mnt_pbuf_count; /* pbuf usage limit */ |
| 222 | struct vnode *mnt_syncer; /* syncer vnode */ |
| 223 | struct syncer_ctx *mnt_syncer_ctx; /* syncer process context */ |
| 224 | struct vnodelst mnt_nvnodelist; /* list of vnodes this mount */ |
| 225 | TAILQ_HEAD(,vmntvnodescan_info) mnt_vnodescan_list; |
| 226 | struct lock mnt_lock; /* mount structure lock */ |
| 227 | int mnt_flag; /* flags shared with user */ |
| 228 | int mnt_kern_flag; /* kernel only flags */ |
| 229 | int mnt_maxsymlinklen; /* max size of short symlink */ |
| 230 | struct statfs mnt_stat; /* cache of filesystem stats */ |
| 231 | struct statvfs mnt_vstat; /* extended stats */ |
| 232 | qaddr_t mnt_data; /* private data */ |
| 233 | time_t mnt_time; /* last time written*/ |
| 234 | u_int mnt_iosize_max; /* max IO request size */ |
| 235 | struct vnodelst mnt_reservedvnlist; /* (future) dirty vnode list */ |
| 236 | int mnt_nvnodelistsize; /* # of vnodes on this mount */ |
| 237 | |
| 238 | /* |
| 239 | * ops vectors have a fixed stacking order. All primary calls run |
| 240 | * through mnt_vn_ops. This field is typically assigned to |
| 241 | * mnt_vn_norm_ops. If journaling has been enabled this field is |
| 242 | * usually assigned to mnt_vn_journal_ops. |
| 243 | */ |
| 244 | struct vop_ops *mnt_vn_use_ops; /* current ops set */ |
| 245 | |
| 246 | struct vop_ops *mnt_vn_coherency_ops; /* cache coherency ops */ |
| 247 | struct vop_ops *mnt_vn_journal_ops; /* journaling ops */ |
| 248 | struct vop_ops *mnt_vn_norm_ops; /* for use by the VFS */ |
| 249 | struct vop_ops *mnt_vn_spec_ops; /* for use by the VFS */ |
| 250 | struct vop_ops *mnt_vn_fifo_ops; /* for use by the VFS */ |
| 251 | struct nchandle mnt_ncmountpt; /* mount point */ |
| 252 | struct nchandle mnt_ncmounton; /* mounted on */ |
| 253 | char mnt_pad[16]; /* (try to cache-align refs) */ |
| 254 | struct ucred *mnt_cred; /* for cr_prison */ |
| 255 | int mnt_refs; /* nchandle references */ |
| 256 | int mnt_hold; /* prevent kfree */ |
| 257 | struct lwkt_token mnt_token; /* token lock if not MPSAFE */ |
| 258 | struct journallst mnt_jlist; /* list of active journals */ |
| 259 | u_int8_t *mnt_jbitmap; /* streamid bitmap */ |
| 260 | int16_t mnt_streamid; /* last streamid */ |
| 261 | |
| 262 | struct bio_ops *mnt_bioops; /* BIO ops (hammer, softupd) */ |
| 263 | struct lock mnt_renlock; /* rename directory lock */ |
| 264 | |
| 265 | struct vfs_acct mnt_acct; /* vfs space accounting */ |
| 266 | RB_ENTRY(mount) mnt_node; /* mnt_stat.f_fsid */ |
| 267 | }; |
| 268 | |
| 269 | #endif /* _KERNEL || _KERNEL_STRUCTURES */ |
| 270 | |
| 271 | /* |
| 272 | * User specifiable flags. |
| 273 | */ |
| 274 | #define MNT_RDONLY 0x00000001 /* read only filesystem */ |
| 275 | #define MNT_SYNCHRONOUS 0x00000002 /* file system written synchronously */ |
| 276 | #define MNT_NOEXEC 0x00000004 /* can't exec from filesystem */ |
| 277 | #define MNT_NOSUID 0x00000008 /* don't honor setuid bits on fs */ |
| 278 | #define MNT_NODEV 0x00000010 /* don't interpret special files */ |
| 279 | #define MNT_AUTOMOUNTED 0x00000020 /* mounted by automountd(8) */ |
| 280 | #define MNT_ASYNC 0x00000040 /* file system written asynchronously */ |
| 281 | #define MNT_SUIDDIR 0x00100000 /* special handling of SUID on dirs */ |
| 282 | #define MNT_SOFTDEP 0x00200000 /* soft updates being done */ |
| 283 | #define MNT_NOSYMFOLLOW 0x00400000 /* do not follow symlinks */ |
| 284 | #define MNT_TRIM 0x01000000 /* Enable online FS trimming */ |
| 285 | #define MNT_NOATIME 0x10000000 /* disable update of file access time */ |
| 286 | #define MNT_NOCLUSTERR 0x40000000 /* disable cluster read */ |
| 287 | #define MNT_NOCLUSTERW 0x80000000 /* disable cluster write */ |
| 288 | |
| 289 | /* |
| 290 | * NFS export related mount flags. |
| 291 | */ |
| 292 | #define MNT_EXRDONLY 0x00000080 /* exported read only */ |
| 293 | #define MNT_EXPORTED 0x00000100 /* file system is exported */ |
| 294 | #define MNT_DEFEXPORTED 0x00000200 /* exported to the world */ |
| 295 | #define MNT_EXPORTANON 0x00000400 /* use anon uid mapping for everyone */ |
| 296 | #define MNT_EXKERB 0x00000800 /* exported with Kerberos uid mapping */ |
| 297 | #define MNT_EXPUBLIC 0x20000000 /* public export (WebNFS) */ |
| 298 | |
| 299 | /* |
| 300 | * Flags set by internal operations, |
| 301 | * but visible to the user. |
| 302 | * XXX some of these are not quite right.. (I've never seen the root flag set) |
| 303 | */ |
| 304 | #define MNT_LOCAL 0x00001000 /* filesystem is stored locally */ |
| 305 | #define MNT_QUOTA 0x00002000 /* quotas are enabled on filesystem */ |
| 306 | #define MNT_ROOTFS 0x00004000 /* identifies the root filesystem */ |
| 307 | #define MNT_USER 0x00008000 /* mounted by a user */ |
| 308 | #define MNT_IGNORE 0x00800000 /* do not show entry in df */ |
| 309 | |
| 310 | /* |
| 311 | * Mask of flags that are visible to statfs() |
| 312 | * XXX I think that this could now become (~(MNT_CMDFLAGS)) |
| 313 | * but the 'mount' program may need changing to handle this. |
| 314 | */ |
| 315 | #define MNT_VISFLAGMASK (MNT_RDONLY | MNT_SYNCHRONOUS | MNT_NOEXEC | \ |
| 316 | MNT_NOSUID | MNT_NODEV | \ |
| 317 | MNT_ASYNC | MNT_EXRDONLY | MNT_EXPORTED | \ |
| 318 | MNT_DEFEXPORTED | MNT_EXPORTANON| MNT_EXKERB | \ |
| 319 | MNT_LOCAL | MNT_USER | MNT_QUOTA | \ |
| 320 | MNT_ROOTFS | MNT_NOATIME | MNT_NOCLUSTERR| \ |
| 321 | MNT_NOCLUSTERW | MNT_SUIDDIR | MNT_SOFTDEP | \ |
| 322 | MNT_IGNORE | MNT_NOSYMFOLLOW | MNT_EXPUBLIC| \ |
| 323 | MNT_TRIM | MNT_AUTOMOUNTED) |
| 324 | /* |
| 325 | * External filesystem command modifier flags. |
| 326 | * Unmount can use the MNT_FORCE flag. |
| 327 | * XXX These are not STATES and really should be somewhere else. |
| 328 | */ |
| 329 | #define MNT_UPDATE 0x00010000 /* not a real mount, just an update */ |
| 330 | #define MNT_DELEXPORT 0x00020000 /* delete export host lists */ |
| 331 | #define MNT_RELOAD 0x00040000 /* reload filesystem data */ |
| 332 | #define MNT_FORCE 0x00080000 /* force unmount or readonly change */ |
| 333 | #define MNT_CMDFLAGS (MNT_UPDATE|MNT_DELEXPORT|MNT_RELOAD|MNT_FORCE) |
| 334 | /* |
| 335 | * Internal filesystem control flags stored in mnt_kern_flag. |
| 336 | * |
| 337 | * MNTK_UNMOUNT locks the mount entry so that name lookup cannot proceed |
| 338 | * past the mount point. This keeps the subtree stable during mounts |
| 339 | * and unmounts. |
| 340 | * |
| 341 | * MNTK_UNMOUNTF permits filesystems to detect a forced unmount while |
| 342 | * dounmount() is still waiting to lock the mountpoint. This allows |
| 343 | * the filesystem to cancel operations that might otherwise deadlock |
| 344 | * with the unmount attempt (used by NFS). |
| 345 | * |
| 346 | * MNTK_NOSTKMNT prevents mounting another filesystem inside the flagged one. |
| 347 | */ |
| 348 | #define MNTK_UNMOUNTF 0x00000001 /* forced unmount in progress */ |
| 349 | #define MNTK_QUICKHALT 0x00008000 /* quick unmount on halt */ |
| 350 | #define MNTK_MPSAFE 0x00010000 /* call vops without mnt_token lock */ |
| 351 | #define MNTK_RD_MPSAFE 0x00020000 /* vop_read is MPSAFE */ |
| 352 | #define MNTK_WR_MPSAFE 0x00040000 /* vop_write is MPSAFE */ |
| 353 | #define MNTK_GA_MPSAFE 0x00080000 /* vop_getattr is MPSAFE */ |
| 354 | #define MNTK_IN_MPSAFE 0x00100000 /* vop_inactive is MPSAFE */ |
| 355 | #define MNTK_SG_MPSAFE 0x00200000 /* vop_strategy is MPSAFE */ |
| 356 | #define MNTK_NCALIASED 0x00800000 /* namecached aliased */ |
| 357 | #define MNTK_UNMOUNT 0x01000000 /* unmount in progress */ |
| 358 | #define MNTK_MWAIT 0x02000000 /* waiting for unmount to finish */ |
| 359 | #define MNTK_WANTRDWR 0x04000000 /* upgrade to read/write requested */ |
| 360 | #define MNTK_NOSTKMNT 0x10000000 /* no stacked mount point allowed */ |
| 361 | #define MNTK_NOMSYNC 0x20000000 /* used by tmpfs */ |
| 362 | #define MNTK_THR_SYNC 0x40000000 /* fs sync thread requested */ |
| 363 | #define MNTK_ST_MPSAFE 0x80000000 /* (mfs) vfs_start is MPSAFE */ |
| 364 | |
| 365 | #define MNTK_ALL_MPSAFE (MNTK_MPSAFE | MNTK_RD_MPSAFE | MNTK_WR_MPSAFE | \ |
| 366 | MNTK_GA_MPSAFE | MNTK_IN_MPSAFE | MNTK_SG_MPSAFE | \ |
| 367 | MNTK_ST_MPSAFE) |
| 368 | |
| 369 | /* |
| 370 | * mountlist_*() defines |
| 371 | */ |
| 372 | #define MNTSCAN_FORWARD 0x0001 |
| 373 | #define MNTSCAN_REVERSE 0x0002 |
| 374 | #define MNTSCAN_NOBUSY 0x0004 |
| 375 | #define MNTSCAN_NOUNLOCK 0x0008 |
| 376 | |
| 377 | #define MNTINS_FIRST 0x0001 |
| 378 | #define MNTINS_LAST 0x0002 |
| 379 | |
| 380 | /* |
| 381 | * Sysctl CTL_VFS definitions. |
| 382 | * |
| 383 | * Second level identifier specifies which filesystem. Second level |
| 384 | * identifier VFS_VFSCONF returns information about all filesystems. |
| 385 | * Second level identifier VFS_GENERIC is non-terminal. |
| 386 | */ |
| 387 | #define VFS_VFSCONF 0 /* get configured filesystems */ |
| 388 | #define VFS_GENERIC 0 /* generic filesystem information */ |
| 389 | /* |
| 390 | * Third level identifiers for VFS_GENERIC are given below; third |
| 391 | * level identifiers for specific filesystems are given in their |
| 392 | * mount specific header files. |
| 393 | */ |
| 394 | #define VFS_MAXTYPENUM 1 /* int: highest defined filesystem type */ |
| 395 | #define VFS_CONF 2 /* struct: vfsconf for filesystem given |
| 396 | as next argument */ |
| 397 | |
| 398 | /* |
| 399 | * VFS MPLOCK helper. |
| 400 | * |
| 401 | * We have to cache the supplied mp because in certain situations |
| 402 | * the related vnode might go away across the use case (vop_strategy()). |
| 403 | */ |
| 404 | #define VFS_MPLOCK_DECLARE struct mount *xlock_mp |
| 405 | |
| 406 | #define VFS_MPLOCK(mp) VFS_MPLOCK_FLAG(mp, MNTK_MPSAFE) |
| 407 | |
| 408 | #define VFS_MPLOCK_FLAG(mp, flag) \ |
| 409 | do { \ |
| 410 | if (mp->mnt_kern_flag & flag) { \ |
| 411 | xlock_mp = NULL; \ |
| 412 | } else { \ |
| 413 | xlock_mp = (mp); \ |
| 414 | get_mplock(); /* TEMPORARY */ \ |
| 415 | lwkt_gettoken(&xlock_mp->mnt_token); \ |
| 416 | } \ |
| 417 | } while(0) |
| 418 | |
| 419 | #define VFS_MPUNLOCK() \ |
| 420 | do { \ |
| 421 | if (xlock_mp) { \ |
| 422 | lwkt_reltoken(&xlock_mp->mnt_token); \ |
| 423 | rel_mplock(); /* TEMPORARY */ \ |
| 424 | } \ |
| 425 | } while(0) |
| 426 | |
| 427 | /* |
| 428 | * Flags for various system call interfaces. |
| 429 | * |
| 430 | * waitfor flags to vfs_sync() and getfsstat() |
| 431 | */ |
| 432 | #define MNT_WAIT 0x0001 /* synchronously wait for I/O to complete */ |
| 433 | #define MNT_NOWAIT 0x0002 /* start all I/O, but do not wait for it */ |
| 434 | #define MNT_LAZY 0x0004 /* be lazy and do not necessarily push it all */ |
| 435 | |
| 436 | #define VOP_FSYNC_SYSCALL 0x0001 /* from system call */ |
| 437 | |
| 438 | /* |
| 439 | * Generic file handle |
| 440 | */ |
| 441 | struct fhandle { |
| 442 | fsid_t fh_fsid; /* File system id of mount point */ |
| 443 | struct fid fh_fid; /* File sys specific id */ |
| 444 | }; |
| 445 | typedef struct fhandle fhandle_t; |
| 446 | |
| 447 | /* |
| 448 | * Export arguments for local filesystem mount calls. |
| 449 | */ |
| 450 | struct export_args { |
| 451 | int ex_flags; /* export related flags */ |
| 452 | uid_t ex_root; /* mapping for root uid */ |
| 453 | struct ucred ex_anon; /* mapping for anonymous user */ |
| 454 | struct sockaddr *ex_addr; /* net address to which exported */ |
| 455 | int ex_addrlen; /* and the net address length */ |
| 456 | struct sockaddr *ex_mask; /* mask of valid bits in saddr */ |
| 457 | int ex_masklen; /* and the smask length */ |
| 458 | char *ex_indexfile; /* index file for WebNFS URLs */ |
| 459 | }; |
| 460 | |
| 461 | /* |
| 462 | * Structure holding information for a publicly exported filesystem |
| 463 | * (WebNFS). Currently the specs allow just for one such filesystem. |
| 464 | */ |
| 465 | struct nfs_public { |
| 466 | int np_valid; /* Do we hold valid information */ |
| 467 | fhandle_t np_handle; /* Filehandle for pub fs (internal) */ |
| 468 | struct mount *np_mount; /* Mountpoint of exported fs */ |
| 469 | char *np_index; /* Index file */ |
| 470 | }; |
| 471 | |
| 472 | /* |
| 473 | * Filesystem configuration information. One of these exists for each |
| 474 | * type of filesystem supported by the kernel. These are searched at |
| 475 | * mount time to identify the requested filesystem. |
| 476 | */ |
| 477 | struct vfsconf { |
| 478 | struct vfsops *vfc_vfsops; /* filesystem operations vector */ |
| 479 | char vfc_name[MFSNAMELEN]; /* filesystem type name */ |
| 480 | int vfc_typenum; /* historic filesystem type number */ |
| 481 | int vfc_refcount; /* number mounted of this type */ |
| 482 | int vfc_flags; /* permanent flags */ |
| 483 | STAILQ_ENTRY(vfsconf) vfc_next; /* next in list */ |
| 484 | }; |
| 485 | |
| 486 | struct ovfsconf { |
| 487 | void *vfc_vfsops; |
| 488 | char vfc_name[32]; |
| 489 | int vfc_index; |
| 490 | int vfc_refcount; |
| 491 | int vfc_flags; |
| 492 | }; |
| 493 | |
| 494 | /* |
| 495 | * NB: these flags refer to IMPLEMENTATION properties, not properties of |
| 496 | * any actual mounts; i.e., it does not make sense to change the flags. |
| 497 | */ |
| 498 | #define VFCF_STATIC 0x00010000 /* statically compiled into kernel */ |
| 499 | #define VFCF_NETWORK 0x00020000 /* may get data over the network */ |
| 500 | #define VFCF_READONLY 0x00040000 /* writes are not implemented */ |
| 501 | #define VFCF_SYNTHETIC 0x00080000 /* data does not represent real files */ |
| 502 | #define VFCF_LOOPBACK 0x00100000 /* aliases some other mounted FS */ |
| 503 | #define VFCF_UNICODE 0x00200000 /* stores file names as Unicode*/ |
| 504 | #define VFCF_MPSAFE 0x00400000 /* VFS is fully MPSAFE */ |
| 505 | |
| 506 | /* vfsquery flags */ |
| 507 | #define VQ_NOTRESP 0x0001 /* server down */ |
| 508 | #define VQ_NEEDAUTH 0x0002 /* server bad auth */ |
| 509 | #define VQ_LOWDISK 0x0004 /* we're low on space */ |
| 510 | #define VQ_MOUNT 0x0008 /* new filesystem arrived */ |
| 511 | #define VQ_UNMOUNT 0x0010 /* filesystem has left */ |
| 512 | #define VQ_DEAD 0x0020 /* filesystem is dead, needs force unmount */ |
| 513 | #define VQ_ASSIST 0x0040 /* filesystem needs assistance from external |
| 514 | program */ |
| 515 | #define VQ_NOTRESPLOCK 0x0080 /* server lockd down */ |
| 516 | #define VQ_FLAG0100 0x0100 /* placeholder */ |
| 517 | #define VQ_FLAG0200 0x0200 /* placeholder */ |
| 518 | #define VQ_FLAG0400 0x0400 /* placeholder */ |
| 519 | #define VQ_FLAG0800 0x0800 /* placeholder */ |
| 520 | #define VQ_FLAG1000 0x1000 /* placeholder */ |
| 521 | #define VQ_FLAG2000 0x2000 /* placeholder */ |
| 522 | #define VQ_FLAG4000 0x4000 /* placeholder */ |
| 523 | #define VQ_FLAG8000 0x8000 /* placeholder */ |
| 524 | |
| 525 | #ifdef _KERNEL |
| 526 | |
| 527 | #ifdef MALLOC_DECLARE |
| 528 | MALLOC_DECLARE(M_MOUNT); |
| 529 | #endif |
| 530 | extern int nfs_mount_type; /* vfc_typenum for nfs, or -1 */ |
| 531 | |
| 532 | struct vfsconf *vfsconf_find_by_name(const char *); |
| 533 | struct vfsconf *vfsconf_find_by_typenum(int); |
| 534 | int vfsconf_get_maxtypenum(void); |
| 535 | int vfsconf_each(int (*)(struct vfsconf *, void *), void *); |
| 536 | |
| 537 | #endif |
| 538 | |
| 539 | #if defined(_KERNEL) || defined(_KERNEL_STRUCTURES) |
| 540 | |
| 541 | TAILQ_HEAD(mntlist, mount); /* struct mntlist */ |
| 542 | |
| 543 | /* |
| 544 | * Operations supported on mounted file system. |
| 545 | */ |
| 546 | struct nlookupdata; |
| 547 | struct mbuf; |
| 548 | |
| 549 | typedef int vfs_mount_t(struct mount *mp, char *path, caddr_t data, |
| 550 | struct ucred *cred); |
| 551 | typedef int vfs_start_t(struct mount *mp, int flags); |
| 552 | typedef int vfs_unmount_t(struct mount *mp, int mntflags); |
| 553 | typedef int vfs_root_t(struct mount *mp, struct vnode **vpp); |
| 554 | typedef int vfs_quotactl_t(struct mount *mp, int cmds, uid_t uid, caddr_t arg, |
| 555 | struct ucred *cred); |
| 556 | typedef int vfs_statfs_t(struct mount *mp, struct statfs *sbp, |
| 557 | struct ucred *cred); |
| 558 | typedef int vfs_statvfs_t(struct mount *mp, struct statvfs *sbp, |
| 559 | struct ucred *cred); |
| 560 | typedef int vfs_sync_t(struct mount *mp, int waitfor); |
| 561 | typedef int vfs_vget_t(struct mount *mp, struct vnode *dvp, |
| 562 | ino_t ino, struct vnode **vpp); |
| 563 | typedef int vfs_fhtovp_t(struct mount *mp, struct vnode *rootvp, |
| 564 | struct fid *fhp, struct vnode **vpp); |
| 565 | typedef int vfs_checkexp_t(struct mount *mp, struct sockaddr *nam, |
| 566 | int *extflagsp, struct ucred **credanonp); |
| 567 | typedef int vfs_vptofh_t(struct vnode *vp, struct fid *fhp); |
| 568 | typedef int vfs_init_t(struct vfsconf *); |
| 569 | typedef int vfs_uninit_t(struct vfsconf *); |
| 570 | typedef int vfs_extattrctl_t(struct mount *mp, int cmd, struct vnode *vp, |
| 571 | int attrnamespace, const char *attrname, |
| 572 | struct ucred *cred); |
| 573 | typedef int vfs_acinit_t(struct mount *mp); |
| 574 | typedef void vfs_acdone_t(struct mount *mp); |
| 575 | typedef void vfs_account_t(struct mount *mp, |
| 576 | uid_t uid, gid_t gid, int64_t delta); |
| 577 | typedef void vfs_ncpgen_set_t(struct mount *mp, struct namecache *ncp); |
| 578 | typedef int vfs_ncpgen_test_t(struct mount *mp, struct namecache *ncp); |
| 579 | typedef int vfs_modifying_t(struct mount *mp); |
| 580 | |
| 581 | int vfs_mount(struct mount *mp, char *path, caddr_t data, struct ucred *cred); |
| 582 | int vfs_start(struct mount *mp, int flags); |
| 583 | int vfs_unmount(struct mount *mp, int mntflags); |
| 584 | int vfs_root(struct mount *mp, struct vnode **vpp); |
| 585 | int vfs_quotactl(struct mount *mp, int cmds, uid_t uid, caddr_t arg, |
| 586 | struct ucred *cred); |
| 587 | int vfs_statfs(struct mount *mp, struct statfs *sbp, struct ucred *cred); |
| 588 | int vfs_statvfs(struct mount *mp, struct statvfs *sbp, struct ucred *cred); |
| 589 | int vfs_sync(struct mount *mp, int waitfor); |
| 590 | int vfs_vget(struct mount *mp, struct vnode *dvp, |
| 591 | ino_t ino, struct vnode **vpp); |
| 592 | int vfs_fhtovp(struct mount *mp, struct vnode *rootvp, |
| 593 | struct fid *fhp, struct vnode **vpp); |
| 594 | int vfs_checkexp(struct mount *mp, struct sockaddr *nam, |
| 595 | int *extflagsp, struct ucred **credanonp); |
| 596 | int vfs_vptofh(struct vnode *vp, struct fid *fhp); |
| 597 | int vfs_init(struct vfsconf *vfc); |
| 598 | int vfs_uninit(struct vfsconf *vfc, struct vfsconf *vfsp); |
| 599 | int vfs_extattrctl(struct mount *mp, int cmd, struct vnode *vp, |
| 600 | int attrnamespace, const char *attrname, |
| 601 | struct ucred *cred); |
| 602 | int vfs_modifying(struct mount *mp); |
| 603 | |
| 604 | struct vfsops { |
| 605 | long vfs_flags; |
| 606 | vfs_mount_t *vfs_mount; |
| 607 | vfs_start_t *vfs_start; |
| 608 | vfs_unmount_t *vfs_unmount; |
| 609 | vfs_root_t *vfs_root; |
| 610 | vfs_quotactl_t *vfs_quotactl; |
| 611 | vfs_statfs_t *vfs_statfs; |
| 612 | vfs_sync_t *vfs_sync; |
| 613 | vfs_vget_t *vfs_vget; |
| 614 | vfs_fhtovp_t *vfs_fhtovp; |
| 615 | vfs_checkexp_t *vfs_checkexp; |
| 616 | vfs_vptofh_t *vfs_vptofh; |
| 617 | vfs_init_t *vfs_init; |
| 618 | vfs_uninit_t *vfs_uninit; |
| 619 | vfs_extattrctl_t *vfs_extattrctl; |
| 620 | vfs_statvfs_t *vfs_statvfs; |
| 621 | vfs_acinit_t *vfs_acinit; |
| 622 | vfs_acdone_t *vfs_acdone; |
| 623 | vfs_account_t *vfs_account; |
| 624 | vfs_ncpgen_set_t *vfs_ncpgen_set; |
| 625 | vfs_ncpgen_test_t *vfs_ncpgen_test; |
| 626 | vfs_modifying_t *vfs_modifying; |
| 627 | }; |
| 628 | |
| 629 | #define VFSOPSF_NOSYNCERTHR 0x00000001 |
| 630 | |
| 631 | #define VFS_MOUNT(MP, PATH, DATA, CRED) \ |
| 632 | vfs_mount(MP, PATH, DATA, CRED) |
| 633 | #define VFS_START(MP, FLAGS) \ |
| 634 | vfs_start(MP, FLAGS) |
| 635 | #define VFS_UNMOUNT(MP, FORCE) \ |
| 636 | vfs_unmount(MP, FORCE) |
| 637 | #define VFS_ROOT(MP, VPP) \ |
| 638 | vfs_root(MP, VPP) |
| 639 | #define VFS_QUOTACTL(MP, C, U, A, CRED) \ |
| 640 | vfs_quotactl(MP, C, U, A, CRED) |
| 641 | #define VFS_STATFS(MP, SBP, CRED) \ |
| 642 | vfs_statfs(MP, SBP, CRED) |
| 643 | #define VFS_STATVFS(MP, SBP, CRED) \ |
| 644 | vfs_statvfs(MP, SBP, CRED) |
| 645 | #define VFS_SYNC(MP, WAIT) \ |
| 646 | vfs_sync(MP, WAIT) |
| 647 | #define VFS_VGET(MP, DVP, INO, VPP) \ |
| 648 | vfs_vget(MP, DVP, INO, VPP) |
| 649 | #define VFS_FHTOVP(MP, ROOTVP, FIDP, VPP) \ |
| 650 | vfs_fhtovp(MP, ROOTVP, FIDP, VPP) |
| 651 | #define VFS_VPTOFH(VP, FIDP) \ |
| 652 | vfs_vptofh(VP, FIDP) |
| 653 | #define VFS_CHECKEXP(MP, NAM, EXFLG, CRED) \ |
| 654 | vfs_checkexp(MP, NAM, EXFLG, CRED) |
| 655 | #define VFS_EXTATTRCTL(MP, C, FVP, NS, N, CRED) \ |
| 656 | vfs_extattrctl(MP, C, FVP, NS, N, CRED) |
| 657 | #define VFS_ACCOUNT(MP, U, G, D) \ |
| 658 | if ((MP->mnt_op->vfs_account != NULL) && (D != 0)) \ |
| 659 | MP->mnt_op->vfs_account(MP, U, G, D); |
| 660 | #define VFS_ACINIT(MP, ERROR) \ |
| 661 | if (vfs_quota_enabled && MP->mnt_op->vfs_acinit != NULL) \ |
| 662 | ERROR = MP->mnt_op->vfs_acinit(MP); |
| 663 | #define VFS_ACDONE(MP) \ |
| 664 | if (vfs_quota_enabled && MP->mnt_op->vfs_acdone != NULL) \ |
| 665 | MP->mnt_op->vfs_acdone(MP); |
| 666 | #define VFS_NCPGEN_SET(MP, NCP) \ |
| 667 | MP->mnt_op->vfs_ncpgen_set(MP, NCP) |
| 668 | #define VFS_NCPGEN_TEST(MP, NCP) \ |
| 669 | MP->mnt_op->vfs_ncpgen_test(MP, NCP) |
| 670 | #define VFS_MODIFYING(MP) \ |
| 671 | MP->mnt_op->vfs_modifying(MP) |
| 672 | |
| 673 | #endif |
| 674 | |
| 675 | #ifdef _KERNEL |
| 676 | |
| 677 | #include <sys/module.h> |
| 678 | |
| 679 | #define VFS_SET(vfsops, fsname, flags) \ |
| 680 | static struct vfsconf fsname ## _vfsconf = { \ |
| 681 | &vfsops, \ |
| 682 | #fsname, \ |
| 683 | -1, \ |
| 684 | 0, \ |
| 685 | flags, \ |
| 686 | { NULL }, \ |
| 687 | }; \ |
| 688 | static moduledata_t fsname ## _mod = { \ |
| 689 | #fsname, \ |
| 690 | vfs_modevent, \ |
| 691 | & fsname ## _vfsconf \ |
| 692 | }; \ |
| 693 | DECLARE_MODULE(fsname, fsname ## _mod, SI_SUB_VFS, SI_ORDER_MIDDLE) |
| 694 | |
| 695 | #endif |
| 696 | |
| 697 | #if defined(_KERNEL) || defined(_KERNEL_STRUCTURES) |
| 698 | |
| 699 | #include <net/radix.h> |
| 700 | |
| 701 | /* |
| 702 | * Network address lookup element |
| 703 | */ |
| 704 | struct netcred { |
| 705 | struct radix_node netc_rnodes[2]; |
| 706 | int netc_exflags; |
| 707 | struct ucred netc_anon; |
| 708 | }; |
| 709 | |
| 710 | /* |
| 711 | * Network export information |
| 712 | */ |
| 713 | struct netexport { |
| 714 | struct netcred ne_defexported; /* Default export */ |
| 715 | struct radix_node_head *ne_inethead; /* IPv4 radix */ |
| 716 | struct radix_node_head *ne_inet6head; /* IPv6 radix */ |
| 717 | struct radix_node_head *ne_maskhead; /* Shared mask radix */ |
| 718 | }; |
| 719 | #define NE_LOCK(nep) lwkt_getpooltoken(nep) |
| 720 | #define NE_UNLOCK(nep) lwkt_relpooltoken(nep) |
| 721 | #define NE_ASSERT_LOCKED(nep) \ |
| 722 | ASSERT_LWKT_TOKEN_HELD(lwkt_token_pool_lookup(nep)) |
| 723 | |
| 724 | #endif |
| 725 | |
| 726 | #ifdef _KERNEL |
| 727 | /* |
| 728 | * exported vnode operations |
| 729 | */ |
| 730 | void mount_hold(struct mount *); |
| 731 | void mount_drop(struct mount *); |
| 732 | int dounmount (struct mount *, int, int); |
| 733 | int vfs_setpublicfs /* set publicly exported fs */ |
| 734 | (struct mount *, struct netexport *, const struct export_args *); |
| 735 | int vfs_lock (struct mount *); /* lock a vfs */ |
| 736 | void vfs_msync (struct mount *, int); |
| 737 | void vfs_unlock (struct mount *); /* unlock a vfs */ |
| 738 | int vfs_busy (struct mount *, int); |
| 739 | int vfs_export /* process mount export info */ |
| 740 | (struct mount *, struct netexport *, const struct export_args *); |
| 741 | struct netcred *vfs_export_lookup /* lookup host in fs export list */ |
| 742 | (struct mount *, struct netexport *, struct sockaddr *); |
| 743 | int vfs_allocate_syncvnode (struct mount *); |
| 744 | void vfs_getnewfsid (struct mount *); |
| 745 | void vfs_setfsid(struct mount *mp, fsid_t *template); |
| 746 | cdev_t vfs_getrootfsid (struct mount *); |
| 747 | struct mount *vfs_getvfs (fsid_t *); /* return vfs given fsid */ |
| 748 | int vfs_modevent (module_t, int, void *); |
| 749 | int vfs_mountedon (struct vnode *); /* is a vfs mounted on vp */ |
| 750 | int vfs_rootmountalloc (char *, char *, struct mount **); |
| 751 | void vfs_unbusy (struct mount *); |
| 752 | void vfs_unmountall (int halting); |
| 753 | int vfs_register (struct vfsconf *); |
| 754 | int vfs_unregister (struct vfsconf *); |
| 755 | extern struct nfs_public nfs_pub; |
| 756 | |
| 757 | /* |
| 758 | * Declarations for these vfs default operations are located in |
| 759 | * kern/vfs_default.c, they should be used instead of making "dummy" |
| 760 | * functions or casting entries in the VFS op table to "enopnotsupp()". |
| 761 | */ |
| 762 | vfs_start_t vfs_stdstart; |
| 763 | vfs_root_t vfs_stdroot; |
| 764 | vfs_quotactl_t vfs_stdquotactl; |
| 765 | vfs_statfs_t vfs_stdstatfs; |
| 766 | vfs_statvfs_t vfs_stdstatvfs; |
| 767 | vfs_sync_t vfs_stdsync; |
| 768 | vfs_sync_t vfs_stdnosync; |
| 769 | vfs_vget_t vfs_stdvget; |
| 770 | vfs_fhtovp_t vfs_stdfhtovp; |
| 771 | vfs_checkexp_t vfs_stdcheckexp; |
| 772 | vfs_vptofh_t vfs_stdvptofh; |
| 773 | vfs_init_t vfs_stdinit; |
| 774 | vfs_uninit_t vfs_stduninit; |
| 775 | vfs_extattrctl_t vfs_stdextattrctl; |
| 776 | vfs_acinit_t vfs_stdac_init; |
| 777 | vfs_acdone_t vfs_stdac_done; |
| 778 | vfs_account_t vfs_stdaccount; |
| 779 | vfs_account_t vfs_noaccount; |
| 780 | vfs_ncpgen_set_t vfs_stdncpgen_set; |
| 781 | vfs_ncpgen_test_t vfs_stdncpgen_test; |
| 782 | vfs_modifying_t vfs_stdmodifying; |
| 783 | |
| 784 | struct vop_access_args; |
| 785 | int vop_helper_access(struct vop_access_args *ap, uid_t ino_uid, gid_t ino_gid, |
| 786 | mode_t ino_mode, u_int32_t ino_flags); |
| 787 | int vop_helper_setattr_flags(u_int32_t *ino_flags, u_int32_t vaflags, |
| 788 | uid_t uid, struct ucred *cred); |
| 789 | uid_t vop_helper_create_uid(struct mount *mp, mode_t dmode, uid_t duid, |
| 790 | struct ucred *cred, mode_t *modep); |
| 791 | int vop_helper_chmod(struct vnode *vp, mode_t new_mode, struct ucred *cred, |
| 792 | uid_t cur_uid, gid_t cur_gid, mode_t *cur_modep); |
| 793 | int vop_helper_chown(struct vnode *vp, uid_t new_uid, gid_t new_gid, |
| 794 | struct ucred *cred, |
| 795 | uid_t *cur_uidp, gid_t *cur_gidp, mode_t *cur_modep); |
| 796 | int vop_helper_read_shortcut(struct vop_read_args *ap); |
| 797 | |
| 798 | void add_bio_ops(struct bio_ops *ops); |
| 799 | void rem_bio_ops(struct bio_ops *ops); |
| 800 | |
| 801 | int journal_mountctl(struct vop_mountctl_args *ap); |
| 802 | void journal_remove_all_journals(struct mount *mp, int flags); |
| 803 | |
| 804 | void mountlist_insert(struct mount *, int); |
| 805 | int mountlist_interlock(int (*callback)(struct mount *), struct mount *); |
| 806 | struct mount *mountlist_boot_getfirst(void); |
| 807 | void mountlist_remove(struct mount *mp); |
| 808 | int mountlist_exists(struct mount *mp); |
| 809 | int mountlist_scan(int (*callback)(struct mount *, void *), void *, int); |
| 810 | struct mount *mount_get_by_nc(struct namecache *ncp); |
| 811 | #else /* !_KERNEL */ |
| 812 | |
| 813 | __BEGIN_DECLS |
| 814 | int fstatfs (int, struct statfs *); |
| 815 | int getfh (const char *, fhandle_t *); |
| 816 | int getfsstat (struct statfs *, long, int); |
| 817 | int getmntinfo (struct statfs **, int); |
| 818 | int getmntvinfo (struct statfs **, struct statvfs **, int); |
| 819 | int mount (const char *, const char *, int, void *); |
| 820 | int statfs (const char *, struct statfs *); |
| 821 | int unmount (const char *, int); |
| 822 | int fhopen (const struct fhandle *, int); |
| 823 | int fhstat (const struct fhandle *, struct stat *); |
| 824 | int fhstatfs (const struct fhandle *, struct statfs *); |
| 825 | |
| 826 | /* C library stuff */ |
| 827 | void endvfsent (void); |
| 828 | struct ovfsconf *getvfsbyname (const char *); |
| 829 | struct ovfsconf *getvfsbytype (int); |
| 830 | struct ovfsconf *getvfsent (void); |
| 831 | #define getvfsbyname new_getvfsbyname |
| 832 | int new_getvfsbyname (const char *, struct vfsconf *); |
| 833 | void setvfsent (int); |
| 834 | int vfsisloadable (const char *); |
| 835 | int vfsload (const char *); |
| 836 | __END_DECLS |
| 837 | |
| 838 | #endif /* _KERNEL */ |
| 839 | |
| 840 | #endif /* !_SYS_MOUNT_H_ */ |
| 841 | |