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