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