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 */ 36 37 #ifndef _SYS_MOUNT_H_ 38 #define _SYS_MOUNT_H_ 39 40 #include <sys/ucred.h> 41 #include <sys/tree.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 #include <sys/vfs_quota.h> 66 #endif 67 68 struct thread; 69 struct journal; 70 struct vop_ops; 71 struct vop_mountctl_args; 72 struct statvfs; 73 74 typedef struct fsid { int32_t val[2]; } fsid_t; /* file system id type */ 75 76 /* 77 * File identifier. These are unique per filesystem on a single machine. 78 * 79 * fix_ext is also used by HAMMER. 80 */ 81 #define MAXFIDSZ 16 82 83 struct fid { 84 u_short fid_len; /* length of data in bytes */ 85 u_short fid_ext; /* extended data */ 86 char fid_data[MAXFIDSZ]; /* data (variable length) */ 87 }; 88 89 /* 90 * file system statistics 91 */ 92 93 #define MFSNAMELEN 16 /* length of fs type name, including null */ 94 #define MNAMELEN 80 /* length of buffer for returned name */ 95 96 struct statfs { 97 long f_spare2; /* placeholder */ 98 long f_bsize; /* fundamental file system block size */ 99 long f_iosize; /* optimal transfer block size */ 100 long f_blocks; /* total data blocks in file system */ 101 long f_bfree; /* free blocks in fs */ 102 long f_bavail; /* free blocks avail to non-superuser */ 103 long f_files; /* total file nodes in file system */ 104 long f_ffree; /* free file nodes in fs */ 105 fsid_t f_fsid; /* file system id */ 106 uid_t f_owner; /* user that mounted the filesystem */ 107 int f_type; /* type of filesystem */ 108 int f_flags; /* copy of mount exported flags */ 109 long f_syncwrites; /* count of sync writes since mount */ 110 long f_asyncwrites; /* count of async writes since mount */ 111 char f_fstypename[MFSNAMELEN]; /* fs type name */ 112 char f_mntonname[MNAMELEN]; /* directory on which mounted */ 113 long f_syncreads; /* count of sync reads since mount */ 114 long f_asyncreads; /* count of async reads since mount */ 115 short f_spares1; /* unused spare */ 116 char f_mntfromname[MNAMELEN];/* mounted filesystem */ 117 short f_spares2; /* unused spare */ 118 long f_spare[2]; /* unused spare */ 119 }; 120 121 #if defined(_KERNEL) || defined(_KERNEL_STRUCTURES) 122 123 /* 124 * bio_ops are associated with the mount structure and used in conjuction 125 * with the b_dep field in a buffer. Currently softupdates and HAMMER 126 * utilize this field. 127 * 128 * All bio_ops callbacks must be MPSAFE and could be called without 129 * the mplock. 130 */ 131 struct buf; 132 133 struct bio_ops { 134 TAILQ_ENTRY(bio_ops) entry; 135 void (*io_start) (struct buf *); 136 void (*io_complete) (struct buf *); 137 void (*io_deallocate) (struct buf *); 138 int (*io_fsync) (struct vnode *); 139 int (*io_sync) (struct mount *); 140 void (*io_movedeps) (struct buf *, struct buf *); 141 int (*io_countdeps) (struct buf *, int); 142 int (*io_checkread) (struct buf *); 143 int (*io_checkwrite) (struct buf *); 144 }; 145 146 #endif 147 148 /* 149 * vfs quota accounting 150 * 151 * uids and gids often come in contiguous blocks; use a small linear 152 * array as the basic in-memory accounting allocation unit 153 */ 154 #define ACCT_CHUNK_BITS 5 155 #define ACCT_CHUNK_NIDS (1<<ACCT_CHUNK_BITS) 156 #define ACCT_CHUNK_MASK (ACCT_CHUNK_NIDS - 1) 157 158 struct ac_counters { 159 uint64_t space; 160 uint64_t limit; 161 }; 162 163 struct ac_unode { 164 RB_ENTRY(ac_unode) rb_entry; 165 uid_t left_bits; 166 struct ac_counters uid_chunk[ACCT_CHUNK_NIDS]; 167 }; 168 169 struct ac_gnode { 170 RB_ENTRY(ac_gnode) rb_entry; 171 gid_t left_bits; 172 struct ac_counters gid_chunk[ACCT_CHUNK_NIDS]; 173 }; 174 175 #if defined(_KERNEL) || defined(_KERNEL_STRUCTURES) 176 177 struct vfs_acct { 178 RB_HEAD(ac_utree,ac_unode) ac_uroot; 179 RB_HEAD(ac_gtree,ac_gnode) ac_groot; 180 uint64_t ac_bytes; /* total bytes used */ 181 uint64_t ac_limit; 182 struct spinlock ac_spin; /* protective spinlock */ 183 }; 184 185 186 /* 187 * Structure per mounted file system. Each mounted file system has an 188 * array of operations and an instance record. The file systems are 189 * put on a doubly linked list. 190 * 191 * NOTE: mnt_nvnodelist and mnt_reservedvnlist. At the moment vnodes 192 * are linked into mnt_nvnodelist. At some point in the near future the 193 * vnode list will be split into a 'dirty' and 'clean' list. mnt_nvnodelist 194 * will become the dirty list and mnt_reservedvnlist will become the 'clean' 195 * list. Filesystem kld's syncing code should remain compatible since 196 * they only need to scan the dirty vnode list (nvnodelist -> dirtyvnodelist). 197 * 198 * NOTE: All VFSs must at least populate mnt_vn_ops or those VOP ops that 199 * only take namecache pointers will not be able to find their operations 200 * vector via namecache->nc_mount. 201 * 202 * MPSAFE NOTES: mnt_lock interlocks mounting and unmounting operations. 203 * 204 * mnt_token interlocks operations which adjust the mount 205 * structure and will also be held through VFS operations 206 * for VFSes not flagged MPSAFE. 207 */ 208 TAILQ_HEAD(vnodelst, vnode); 209 TAILQ_HEAD(journallst, journal); 210 211 struct mount { 212 TAILQ_ENTRY(mount) mnt_list; /* mount list */ 213 struct vfsops *mnt_op; /* operations on fs */ 214 struct vfsconf *mnt_vfc; /* configuration info */ 215 long mnt_namecache_gen; /* ++ to clear negative hits */ 216 struct vnode *mnt_syncer; /* syncer vnode */ 217 struct syncer_ctx *mnt_syncer_ctx; /* syncer process context */ 218 struct vnodelst mnt_nvnodelist; /* list of vnodes this mount */ 219 struct lock mnt_lock; /* mount structure lock */ 220 int mnt_flag; /* flags shared with user */ 221 int mnt_kern_flag; /* kernel only flags */ 222 int mnt_maxsymlinklen; /* max size of short symlink */ 223 struct statfs mnt_stat; /* cache of filesystem stats */ 224 struct statvfs mnt_vstat; /* extended stats */ 225 qaddr_t mnt_data; /* private data */ 226 time_t mnt_time; /* last time written*/ 227 u_int mnt_iosize_max; /* max IO request size */ 228 struct vnodelst mnt_reservedvnlist; /* (future) dirty vnode list */ 229 int mnt_nvnodelistsize; /* # of vnodes on this mount */ 230 231 /* 232 * ops vectors have a fixed stacking order. All primary calls run 233 * through mnt_vn_ops. This field is typically assigned to 234 * mnt_vn_norm_ops. If journaling has been enabled this field is 235 * usually assigned to mnt_vn_journal_ops. 236 */ 237 struct vop_ops *mnt_vn_use_ops; /* current ops set */ 238 239 struct vop_ops *mnt_vn_coherency_ops; /* cache coherency ops */ 240 struct vop_ops *mnt_vn_journal_ops; /* journaling ops */ 241 struct vop_ops *mnt_vn_norm_ops; /* for use by the VFS */ 242 struct vop_ops *mnt_vn_spec_ops; /* for use by the VFS */ 243 struct vop_ops *mnt_vn_fifo_ops; /* for use by the VFS */ 244 struct nchandle mnt_ncmountpt; /* mount point */ 245 struct nchandle mnt_ncmounton; /* mounted on */ 246 int mnt_refs; /* nchandle references */ 247 struct lwkt_token mnt_token; /* token lock if not MPSAFE */ 248 struct journallst mnt_jlist; /* list of active journals */ 249 u_int8_t *mnt_jbitmap; /* streamid bitmap */ 250 int16_t mnt_streamid; /* last streamid */ 251 252 struct bio_ops *mnt_bioops; /* BIO ops (hammer, softupd) */ 253 254 struct vfs_acct mnt_acct; /* vfs space accounting */ 255 }; 256 257 #endif /* _KERNEL || _KERNEL_STRUCTURES */ 258 259 /* 260 * User specifiable flags. 261 */ 262 #define MNT_RDONLY 0x00000001 /* read only filesystem */ 263 #define MNT_SYNCHRONOUS 0x00000002 /* file system written synchronously */ 264 #define MNT_NOEXEC 0x00000004 /* can't exec from filesystem */ 265 #define MNT_NOSUID 0x00000008 /* don't honor setuid bits on fs */ 266 #define MNT_NODEV 0x00000010 /* don't interpret special files */ 267 #define MNT_UNION 0x00000020 /* union with underlying filesystem */ 268 #define MNT_ASYNC 0x00000040 /* file system written asynchronously */ 269 #define MNT_SUIDDIR 0x00100000 /* special handling of SUID on dirs */ 270 #define MNT_SOFTDEP 0x00200000 /* soft updates being done */ 271 #define MNT_NOSYMFOLLOW 0x00400000 /* do not follow symlinks */ 272 #define MNT_TRIM 0x01000000 /* Enable online FS trimming */ 273 #define MNT_NOATIME 0x10000000 /* disable update of file access time */ 274 #define MNT_NOCLUSTERR 0x40000000 /* disable cluster read */ 275 #define MNT_NOCLUSTERW 0x80000000 /* disable cluster write */ 276 277 /* 278 * NFS export related mount flags. 279 */ 280 #define MNT_EXRDONLY 0x00000080 /* exported read only */ 281 #define MNT_EXPORTED 0x00000100 /* file system is exported */ 282 #define MNT_DEFEXPORTED 0x00000200 /* exported to the world */ 283 #define MNT_EXPORTANON 0x00000400 /* use anon uid mapping for everyone */ 284 #define MNT_EXKERB 0x00000800 /* exported with Kerberos uid mapping */ 285 #define MNT_EXPUBLIC 0x20000000 /* public export (WebNFS) */ 286 287 /* 288 * Flags set by internal operations, 289 * but visible to the user. 290 * XXX some of these are not quite right.. (I've never seen the root flag set) 291 */ 292 #define MNT_LOCAL 0x00001000 /* filesystem is stored locally */ 293 #define MNT_QUOTA 0x00002000 /* quotas are enabled on filesystem */ 294 #define MNT_ROOTFS 0x00004000 /* identifies the root filesystem */ 295 #define MNT_USER 0x00008000 /* mounted by a user */ 296 #define MNT_IGNORE 0x00800000 /* do not show entry in df */ 297 298 /* 299 * Mask of flags that are visible to statfs() 300 * XXX I think that this could now become (~(MNT_CMDFLAGS)) 301 * but the 'mount' program may need changing to handle this. 302 */ 303 #define MNT_VISFLAGMASK (MNT_RDONLY | MNT_SYNCHRONOUS | MNT_NOEXEC | \ 304 MNT_NOSUID | MNT_NODEV | MNT_UNION | \ 305 MNT_ASYNC | MNT_EXRDONLY | MNT_EXPORTED | \ 306 MNT_DEFEXPORTED | MNT_EXPORTANON| MNT_EXKERB | \ 307 MNT_LOCAL | MNT_USER | MNT_QUOTA | \ 308 MNT_ROOTFS | MNT_NOATIME | MNT_NOCLUSTERR| \ 309 MNT_NOCLUSTERW | MNT_SUIDDIR | MNT_SOFTDEP | \ 310 MNT_IGNORE | MNT_NOSYMFOLLOW | MNT_EXPUBLIC| \ 311 MNT_TRIM) 312 /* 313 * External filesystem command modifier flags. 314 * Unmount can use the MNT_FORCE flag. 315 * XXX These are not STATES and really should be somewhere else. 316 */ 317 #define MNT_UPDATE 0x00010000 /* not a real mount, just an update */ 318 #define MNT_DELEXPORT 0x00020000 /* delete export host lists */ 319 #define MNT_RELOAD 0x00040000 /* reload filesystem data */ 320 #define MNT_FORCE 0x00080000 /* force unmount or readonly change */ 321 #define MNT_CMDFLAGS (MNT_UPDATE|MNT_DELEXPORT|MNT_RELOAD|MNT_FORCE) 322 /* 323 * Internal filesystem control flags stored in mnt_kern_flag. 324 * 325 * MNTK_UNMOUNT locks the mount entry so that name lookup cannot proceed 326 * past the mount point. This keeps the subtree stable during mounts 327 * and unmounts. 328 * 329 * MNTK_UNMOUNTF permits filesystems to detect a forced unmount while 330 * dounmount() is still waiting to lock the mountpoint. This allows 331 * the filesystem to cancel operations that might otherwise deadlock 332 * with the unmount attempt (used by NFS). 333 * 334 * MNTK_NOSTKMNT prevents mounting another filesystem inside the flagged one. 335 */ 336 #define MNTK_UNMOUNTF 0x00000001 /* forced unmount in progress */ 337 #define MNTK_MPSAFE 0x00010000 /* call vops without mnt_token lock */ 338 #define MNTK_RD_MPSAFE 0x00020000 /* vop_read is MPSAFE */ 339 #define MNTK_WR_MPSAFE 0x00040000 /* vop_write is MPSAFE */ 340 #define MNTK_GA_MPSAFE 0x00080000 /* vop_getattr is MPSAFE */ 341 #define MNTK_IN_MPSAFE 0x00100000 /* vop_inactive is MPSAFE */ 342 #define MNTK_SG_MPSAFE 0x00200000 /* vop_strategy is MPSAFE */ 343 #define MNTK_NCALIASED 0x00800000 /* namecached aliased */ 344 #define MNTK_UNMOUNT 0x01000000 /* unmount in progress */ 345 #define MNTK_MWAIT 0x02000000 /* waiting for unmount to finish */ 346 #define MNTK_WANTRDWR 0x04000000 /* upgrade to read/write requested */ 347 #define MNTK_FSMID 0x08000000 /* getattr supports FSMIDs */ 348 #define MNTK_NOSTKMNT 0x10000000 /* no stacked mount point allowed */ 349 #define MNTK_NOMSYNC 0x20000000 /* used by tmpfs */ 350 #define MNTK_THR_SYNC 0x40000000 /* fs sync thread requested */ 351 #define MNTK_ST_MPSAFE 0x80000000 /* (mfs) vfs_start is MPSAFE */ 352 353 #define MNTK_ALL_MPSAFE (MNTK_MPSAFE | MNTK_RD_MPSAFE | MNTK_WR_MPSAFE | \ 354 MNTK_GA_MPSAFE | MNTK_IN_MPSAFE | MNTK_SG_MPSAFE | \ 355 MNTK_ST_MPSAFE) 356 357 /* 358 * mountlist_*() defines 359 */ 360 #define MNTSCAN_FORWARD 0x0001 361 #define MNTSCAN_REVERSE 0x0002 362 #define MNTSCAN_NOBUSY 0x0004 363 364 #define MNTINS_FIRST 0x0001 365 #define MNTINS_LAST 0x0002 366 367 /* 368 * Sysctl CTL_VFS definitions. 369 * 370 * Second level identifier specifies which filesystem. Second level 371 * identifier VFS_VFSCONF returns information about all filesystems. 372 * Second level identifier VFS_GENERIC is non-terminal. 373 */ 374 #define VFS_VFSCONF 0 /* get configured filesystems */ 375 #define VFS_GENERIC 0 /* generic filesystem information */ 376 /* 377 * Third level identifiers for VFS_GENERIC are given below; third 378 * level identifiers for specific filesystems are given in their 379 * mount specific header files. 380 */ 381 #define VFS_MAXTYPENUM 1 /* int: highest defined filesystem type */ 382 #define VFS_CONF 2 /* struct: vfsconf for filesystem given 383 as next argument */ 384 385 /* 386 * VFS MPLOCK helper. 387 */ 388 #define VFS_MPLOCK_DECLARE int xlock_mpsafe 389 390 #define VFS_MPLOCK1(mp) VFS_MPLOCK_FLAG(mp, MNTK_MPSAFE) 391 392 #define VFS_MPLOCK2(mp) \ 393 do { \ 394 if (xlock_mpsafe) { \ 395 get_mplock(); /* TEMPORARY */ \ 396 lwkt_gettoken(&mp->mnt_token); \ 397 xlock_mpsafe = 0; \ 398 } \ 399 } while(0) 400 401 #define VFS_MPLOCK_FLAG(mp, flag) \ 402 do { \ 403 if (mp->mnt_kern_flag & flag) { \ 404 xlock_mpsafe = 1; \ 405 } else { \ 406 get_mplock(); /* TEMPORARY */ \ 407 lwkt_gettoken(&mp->mnt_token); \ 408 xlock_mpsafe = 0; \ 409 } \ 410 } while(0) 411 412 #define VFS_MPUNLOCK(mp) \ 413 do { \ 414 if (xlock_mpsafe == 0) { \ 415 lwkt_reltoken(&mp->mnt_token); \ 416 rel_mplock(); /* TEMPORARY */ \ 417 } \ 418 } while(0) 419 420 /* 421 * Flags for various system call interfaces. 422 * 423 * waitfor flags to vfs_sync() and getfsstat() 424 */ 425 #define MNT_WAIT 0x0001 /* synchronously wait for I/O to complete */ 426 #define MNT_NOWAIT 0x0002 /* start all I/O, but do not wait for it */ 427 #define MNT_LAZY 0x0004 /* be lazy and do not necessarily push it all */ 428 429 #define VOP_FSYNC_SYSCALL 0x0001 /* from system call */ 430 431 /* 432 * Generic file handle 433 */ 434 struct fhandle { 435 fsid_t fh_fsid; /* File system id of mount point */ 436 struct fid fh_fid; /* File sys specific id */ 437 }; 438 typedef struct fhandle fhandle_t; 439 440 /* 441 * Export arguments for local filesystem mount calls. 442 */ 443 struct export_args { 444 int ex_flags; /* export related flags */ 445 uid_t ex_root; /* mapping for root uid */ 446 struct ucred ex_anon; /* mapping for anonymous user */ 447 struct sockaddr *ex_addr; /* net address to which exported */ 448 int ex_addrlen; /* and the net address length */ 449 struct sockaddr *ex_mask; /* mask of valid bits in saddr */ 450 int ex_masklen; /* and the smask length */ 451 char *ex_indexfile; /* index file for WebNFS URLs */ 452 }; 453 454 /* 455 * Structure holding information for a publicly exported filesystem 456 * (WebNFS). Currently the specs allow just for one such filesystem. 457 */ 458 struct nfs_public { 459 int np_valid; /* Do we hold valid information */ 460 fhandle_t np_handle; /* Filehandle for pub fs (internal) */ 461 struct mount *np_mount; /* Mountpoint of exported fs */ 462 char *np_index; /* Index file */ 463 }; 464 465 /* 466 * Filesystem configuration information. One of these exists for each 467 * type of filesystem supported by the kernel. These are searched at 468 * mount time to identify the requested filesystem. 469 */ 470 #ifndef _SYS_QUEUE_H_ 471 #include <sys/queue.h> 472 #endif 473 struct vfsconf { 474 struct vfsops *vfc_vfsops; /* filesystem operations vector */ 475 char vfc_name[MFSNAMELEN]; /* filesystem type name */ 476 int vfc_typenum; /* historic filesystem type number */ 477 int vfc_refcount; /* number mounted of this type */ 478 int vfc_flags; /* permanent flags */ 479 STAILQ_ENTRY(vfsconf) vfc_next; /* next in list */ 480 }; 481 482 struct ovfsconf { 483 void *vfc_vfsops; 484 char vfc_name[32]; 485 int vfc_index; 486 int vfc_refcount; 487 int vfc_flags; 488 }; 489 490 /* 491 * NB: these flags refer to IMPLEMENTATION properties, not properties of 492 * any actual mounts; i.e., it does not make sense to change the flags. 493 */ 494 #define VFCF_STATIC 0x00010000 /* statically compiled into kernel */ 495 #define VFCF_NETWORK 0x00020000 /* may get data over the network */ 496 #define VFCF_READONLY 0x00040000 /* writes are not implemented */ 497 #define VFCF_SYNTHETIC 0x00080000 /* data does not represent real files */ 498 #define VFCF_LOOPBACK 0x00100000 /* aliases some other mounted FS */ 499 #define VFCF_UNICODE 0x00200000 /* stores file names as Unicode*/ 500 501 #ifdef _KERNEL 502 503 #ifdef MALLOC_DECLARE 504 MALLOC_DECLARE(M_MOUNT); 505 #endif 506 extern int nfs_mount_type; /* vfc_typenum for nfs, or -1 */ 507 508 struct vfsconf *vfsconf_find_by_name(const char *); 509 struct vfsconf *vfsconf_find_by_typenum(int); 510 int vfsconf_get_maxtypenum(void); 511 int vfsconf_each(int (*)(struct vfsconf *, void *), void *); 512 513 #endif 514 515 #if defined(_KERNEL) || defined(_KERNEL_STRUCTURES) 516 517 TAILQ_HEAD(mntlist, mount); /* struct mntlist */ 518 519 /* 520 * Operations supported on mounted file system. 521 */ 522 struct nlookupdata; 523 struct nlookupdata; 524 struct mbuf; 525 526 typedef int vfs_mount_t(struct mount *mp, char *path, caddr_t data, 527 struct ucred *cred); 528 typedef int vfs_start_t(struct mount *mp, int flags); 529 typedef int vfs_unmount_t(struct mount *mp, int mntflags); 530 typedef int vfs_root_t(struct mount *mp, struct vnode **vpp); 531 typedef int vfs_quotactl_t(struct mount *mp, int cmds, uid_t uid, caddr_t arg, 532 struct ucred *cred); 533 typedef int vfs_statfs_t(struct mount *mp, struct statfs *sbp, 534 struct ucred *cred); 535 typedef int vfs_statvfs_t(struct mount *mp, struct statvfs *sbp, 536 struct ucred *cred); 537 typedef int vfs_sync_t(struct mount *mp, int waitfor); 538 typedef int vfs_vget_t(struct mount *mp, struct vnode *dvp, 539 ino_t ino, struct vnode **vpp); 540 typedef int vfs_fhtovp_t(struct mount *mp, struct vnode *rootvp, 541 struct fid *fhp, struct vnode **vpp); 542 typedef int vfs_checkexp_t(struct mount *mp, struct sockaddr *nam, 543 int *extflagsp, struct ucred **credanonp); 544 typedef int vfs_vptofh_t(struct vnode *vp, struct fid *fhp); 545 typedef int vfs_init_t(struct vfsconf *); 546 typedef int vfs_uninit_t(struct vfsconf *); 547 typedef int vfs_extattrctl_t(struct mount *mp, int cmd, struct vnode *vp, 548 int attrnamespace, const char *attrname, 549 struct ucred *cred); 550 typedef int vfs_acinit_t(struct mount *mp); 551 typedef void vfs_acdone_t(struct mount *mp); 552 typedef void vfs_account_t(struct mount *mp, 553 uid_t uid, gid_t gid, int64_t delta); 554 typedef void vfs_ncpgen_set_t(struct mount *mp, struct namecache *ncp); 555 typedef int vfs_ncpgen_test_t(struct mount *mp, struct namecache *ncp); 556 557 int vfs_mount(struct mount *mp, char *path, caddr_t data, struct ucred *cred); 558 int vfs_start(struct mount *mp, int flags); 559 int vfs_unmount(struct mount *mp, int mntflags); 560 int vfs_root(struct mount *mp, struct vnode **vpp); 561 int vfs_quotactl(struct mount *mp, int cmds, uid_t uid, caddr_t arg, 562 struct ucred *cred); 563 int vfs_statfs(struct mount *mp, struct statfs *sbp, struct ucred *cred); 564 int vfs_statvfs(struct mount *mp, struct statvfs *sbp, struct ucred *cred); 565 int vfs_sync(struct mount *mp, int waitfor); 566 int vfs_vget(struct mount *mp, struct vnode *dvp, 567 ino_t ino, struct vnode **vpp); 568 int vfs_fhtovp(struct mount *mp, struct vnode *rootvp, 569 struct fid *fhp, struct vnode **vpp); 570 int vfs_checkexp(struct mount *mp, struct sockaddr *nam, 571 int *extflagsp, struct ucred **credanonp); 572 int vfs_vptofh(struct vnode *vp, struct fid *fhp); 573 int vfs_init(struct vfsconf *vfc); 574 int vfs_uninit(struct vfsconf *vfc, struct vfsconf *vfsp); 575 int vfs_extattrctl(struct mount *mp, int cmd, struct vnode *vp, 576 int attrnamespace, const char *attrname, 577 struct ucred *cred); 578 579 580 struct vfsops { 581 vfs_mount_t *vfs_mount; 582 vfs_start_t *vfs_start; 583 vfs_unmount_t *vfs_unmount; 584 vfs_root_t *vfs_root; 585 vfs_quotactl_t *vfs_quotactl; 586 vfs_statfs_t *vfs_statfs; 587 vfs_sync_t *vfs_sync; 588 vfs_vget_t *vfs_vget; 589 vfs_fhtovp_t *vfs_fhtovp; 590 vfs_checkexp_t *vfs_checkexp; 591 vfs_vptofh_t *vfs_vptofh; 592 vfs_init_t *vfs_init; 593 vfs_uninit_t *vfs_uninit; 594 vfs_extattrctl_t *vfs_extattrctl; 595 vfs_statvfs_t *vfs_statvfs; 596 vfs_acinit_t *vfs_acinit; 597 vfs_acdone_t *vfs_acdone; 598 vfs_account_t *vfs_account; 599 vfs_ncpgen_set_t *vfs_ncpgen_set; 600 vfs_ncpgen_test_t *vfs_ncpgen_test; 601 }; 602 603 #define VFS_MOUNT(MP, PATH, DATA, CRED) \ 604 vfs_mount(MP, PATH, DATA, CRED) 605 #define VFS_START(MP, FLAGS) \ 606 vfs_start(MP, FLAGS) 607 #define VFS_UNMOUNT(MP, FORCE) \ 608 vfs_unmount(MP, FORCE) 609 #define VFS_ROOT(MP, VPP) \ 610 vfs_root(MP, VPP) 611 #define VFS_QUOTACTL(MP, C, U, A, CRED) \ 612 vfs_quotactl(MP, C, U, A, CRED) 613 #define VFS_STATFS(MP, SBP, CRED) \ 614 vfs_statfs(MP, SBP, CRED) 615 #define VFS_STATVFS(MP, SBP, CRED) \ 616 vfs_statvfs(MP, SBP, CRED) 617 #define VFS_SYNC(MP, WAIT) \ 618 vfs_sync(MP, WAIT) 619 #define VFS_VGET(MP, DVP, INO, VPP) \ 620 vfs_vget(MP, DVP, INO, VPP) 621 #define VFS_FHTOVP(MP, ROOTVP, FIDP, VPP) \ 622 vfs_fhtovp(MP, ROOTVP, FIDP, VPP) 623 #define VFS_VPTOFH(VP, FIDP) \ 624 vfs_vptofh(VP, FIDP) 625 #define VFS_CHECKEXP(MP, NAM, EXFLG, CRED) \ 626 vfs_checkexp(MP, NAM, EXFLG, CRED) 627 #define VFS_EXTATTRCTL(MP, C, FVP, NS, N, CRED) \ 628 vfs_extattrctl(MP, C, FVP, NS, N, CRED) 629 #define VFS_ACCOUNT(MP, U, G, D) \ 630 if ((MP->mnt_op->vfs_account != NULL) && (D != 0)) \ 631 MP->mnt_op->vfs_account(MP, U, G, D); 632 #define VFS_ACINIT(MP, ERROR) \ 633 if (vfs_quota_enabled && MP->mnt_op->vfs_acinit != NULL) \ 634 ERROR = MP->mnt_op->vfs_acinit(MP); 635 #define VFS_ACDONE(MP) \ 636 if (vfs_quota_enabled && MP->mnt_op->vfs_acdone != NULL) \ 637 MP->mnt_op->vfs_acdone(MP); 638 #define VFS_NCPGEN_SET(MP, NCP) \ 639 MP->mnt_op->vfs_ncpgen_set(MP, NCP) 640 #define VFS_NCPGEN_TEST(MP, NCP) \ 641 MP->mnt_op->vfs_ncpgen_test(MP, NCP) 642 643 #endif 644 645 #ifdef _KERNEL 646 647 #include <sys/module.h> 648 649 #define VFS_SET(vfsops, fsname, flags) \ 650 static struct vfsconf fsname ## _vfsconf = { \ 651 &vfsops, \ 652 #fsname, \ 653 -1, \ 654 0, \ 655 flags, \ 656 { NULL }, \ 657 }; \ 658 static moduledata_t fsname ## _mod = { \ 659 #fsname, \ 660 vfs_modevent, \ 661 & fsname ## _vfsconf \ 662 }; \ 663 DECLARE_MODULE(fsname, fsname ## _mod, SI_SUB_VFS, SI_ORDER_MIDDLE) 664 665 #endif 666 667 #if defined(_KERNEL) || defined(_KERNEL_STRUCTURES) 668 669 #include <net/radix.h> 670 671 #define AF_MAX 36 /* XXX */ 672 673 /* 674 * Network address lookup element 675 */ 676 struct netcred { 677 struct radix_node netc_rnodes[2]; 678 int netc_exflags; 679 struct ucred netc_anon; 680 }; 681 682 /* 683 * Network export information 684 */ 685 struct netexport { 686 struct netcred ne_defexported; /* Default export */ 687 struct radix_node_head *ne_rtable[AF_MAX+1]; /* Individual exports */ 688 }; 689 690 #endif 691 692 #ifdef _KERNEL 693 694 extern char *mountrootfsname; 695 696 /* 697 * exported vnode operations 698 */ 699 int dounmount (struct mount *, int); 700 int vfs_setpublicfs /* set publicly exported fs */ 701 (struct mount *, struct netexport *, const struct export_args *); 702 int vfs_lock (struct mount *); /* lock a vfs */ 703 void vfs_msync (struct mount *, int); 704 void vfs_unlock (struct mount *); /* unlock a vfs */ 705 int vfs_busy (struct mount *, int); 706 void vfs_bufstats(void); 707 int vfs_export /* process mount export info */ 708 (struct mount *, struct netexport *, const struct export_args *); 709 struct netcred *vfs_export_lookup /* lookup host in fs export list */ 710 (struct mount *, struct netexport *, struct sockaddr *); 711 int vfs_allocate_syncvnode (struct mount *); 712 void vfs_getnewfsid (struct mount *); 713 int vfs_setfsid(struct mount *mp, fsid_t *template); 714 cdev_t vfs_getrootfsid (struct mount *); 715 struct mount *vfs_getvfs (fsid_t *); /* return vfs given fsid */ 716 int vfs_modevent (module_t, int, void *); 717 int vfs_mountedon (struct vnode *); /* is a vfs mounted on vp */ 718 int vfs_rootmountalloc (char *, char *, struct mount **); 719 void vfs_unbusy (struct mount *); 720 void vfs_unmountall (void); 721 int vfs_register (struct vfsconf *); 722 int vfs_unregister (struct vfsconf *); 723 extern struct nfs_public nfs_pub; 724 725 /* 726 * Declarations for these vfs default operations are located in 727 * kern/vfs_default.c, they should be used instead of making "dummy" 728 * functions or casting entries in the VFS op table to "enopnotsupp()". 729 */ 730 vfs_start_t vfs_stdstart; 731 vfs_mount_t vfs_stdmount; 732 vfs_unmount_t vfs_stdunmount; 733 vfs_root_t vfs_stdroot; 734 vfs_quotactl_t vfs_stdquotactl; 735 vfs_statfs_t vfs_stdstatfs; 736 vfs_statvfs_t vfs_stdstatvfs; 737 vfs_sync_t vfs_stdsync; 738 vfs_sync_t vfs_stdnosync; 739 vfs_vget_t vfs_stdvget; 740 vfs_fhtovp_t vfs_stdfhtovp; 741 vfs_checkexp_t vfs_stdcheckexp; 742 vfs_vptofh_t vfs_stdvptofh; 743 vfs_init_t vfs_stdinit; 744 vfs_uninit_t vfs_stduninit; 745 vfs_extattrctl_t vfs_stdextattrctl; 746 vfs_acinit_t vfs_stdac_init; 747 vfs_acdone_t vfs_stdac_done; 748 vfs_account_t vfs_stdaccount; 749 vfs_account_t vfs_noaccount; 750 vfs_ncpgen_set_t vfs_stdncpgen_set; 751 vfs_ncpgen_test_t vfs_stdncpgen_test; 752 753 struct vop_access_args; 754 int vop_helper_access(struct vop_access_args *ap, uid_t ino_uid, gid_t ino_gid, 755 mode_t ino_mode, u_int32_t ino_flags); 756 int vop_helper_setattr_flags(u_int32_t *ino_flags, u_int32_t vaflags, 757 uid_t uid, struct ucred *cred); 758 uid_t vop_helper_create_uid(struct mount *mp, mode_t dmode, uid_t duid, 759 struct ucred *cred, mode_t *modep); 760 int vop_helper_chmod(struct vnode *vp, mode_t new_mode, struct ucred *cred, 761 uid_t cur_uid, gid_t cur_gid, mode_t *cur_modep); 762 int vop_helper_chown(struct vnode *vp, uid_t new_uid, gid_t new_gid, 763 struct ucred *cred, 764 uid_t *cur_uidp, gid_t *cur_gidp, mode_t *cur_modep); 765 int vop_helper_read_shortcut(struct vop_read_args *ap); 766 767 void add_bio_ops(struct bio_ops *ops); 768 void rem_bio_ops(struct bio_ops *ops); 769 770 int journal_mountctl(struct vop_mountctl_args *ap); 771 void journal_remove_all_journals(struct mount *mp, int flags); 772 773 void mountlist_insert(struct mount *, int); 774 int mountlist_interlock(int (*callback)(struct mount *), struct mount *); 775 struct mount *mountlist_boot_getfirst(void); 776 void mountlist_remove(struct mount *mp); 777 int mountlist_exists(struct mount *mp); 778 int mountlist_scan(int (*callback)(struct mount *, void *), void *, int); 779 struct mount *mount_get_by_nc(struct namecache *ncp); 780 #else /* !_KERNEL */ 781 782 #include <sys/cdefs.h> 783 784 __BEGIN_DECLS 785 int fstatfs (int, struct statfs *); 786 int getfh (const char *, fhandle_t *); 787 int getfsstat (struct statfs *, long, int); 788 int getmntinfo (struct statfs **, int); 789 int getmntvinfo (struct statfs **, struct statvfs **, int); 790 int mount (const char *, const char *, int, void *); 791 int statfs (const char *, struct statfs *); 792 int unmount (const char *, int); 793 int fhopen (const struct fhandle *, int); 794 int fhstat (const struct fhandle *, struct stat *); 795 int fhstatfs (const struct fhandle *, struct statfs *); 796 797 /* C library stuff */ 798 void endvfsent (void); 799 struct ovfsconf *getvfsbyname (const char *); 800 struct ovfsconf *getvfsbytype (int); 801 struct ovfsconf *getvfsent (void); 802 #define getvfsbyname new_getvfsbyname 803 int new_getvfsbyname (const char *, struct vfsconf *); 804 void setvfsent (int); 805 int vfsisloadable (const char *); 806 int vfsload (const char *); 807 __END_DECLS 808 809 #endif /* _KERNEL */ 810 811 #endif /* !_SYS_MOUNT_H_ */ 812 813