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/ucred.h> 37 #include <sys/tree.h> 38 39 #ifndef _KERNEL 40 #if !defined(_POSIX_C_SOURCE) && !defined(_XOPEN_SOURCE) 41 #include <sys/stat.h> 42 #endif /* !_POSIX_C_SOURCE */ 43 #endif /* !_KERNEL */ 44 45 #if defined(_KERNEL) || defined(_KERNEL_STRUCTURES) 46 #ifndef _SYS_QUEUE_H_ 47 #include <sys/queue.h> 48 #endif 49 #ifndef _SYS_LOCK_H_ 50 #include <sys/lock.h> 51 #endif 52 #ifndef _SYS_NAMECACHE_H_ 53 #include <sys/namecache.h> 54 #endif 55 #ifndef _SYS_STATVFS_H_ 56 #include <sys/statvfs.h> 57 #endif 58 #ifndef _SYS_THREAD_H_ 59 #include <sys/thread.h> 60 #endif 61 #include <sys/vfs_quota.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 /* 74 * File identifier. These are unique per filesystem on a single machine. 75 * 76 * fix_ext is also used by HAMMER. 77 */ 78 #define MAXFIDSZ 16 79 80 struct fid { 81 u_short fid_len; /* length of data in bytes */ 82 u_short fid_ext; /* extended data */ 83 char fid_data[MAXFIDSZ]; /* data (variable length) */ 84 }; 85 86 /* 87 * file system statistics 88 */ 89 90 #define MFSNAMELEN 16 /* length of fs type name, including null */ 91 #define MNAMELEN 80 /* length of buffer for returned name */ 92 93 struct statfs { 94 long f_spare2; /* placeholder */ 95 long f_bsize; /* fundamental file system block size */ 96 long f_iosize; /* optimal transfer block size */ 97 long f_blocks; /* total data blocks in file system */ 98 long f_bfree; /* free blocks in fs */ 99 long f_bavail; /* free blocks avail to non-superuser */ 100 long f_files; /* total file nodes in file system */ 101 long f_ffree; /* free file nodes in fs */ 102 fsid_t f_fsid; /* file system id */ 103 uid_t f_owner; /* user that mounted the filesystem */ 104 int f_type; /* type of filesystem */ 105 int f_flags; /* copy of mount exported flags */ 106 long f_syncwrites; /* count of sync writes since mount */ 107 long f_asyncwrites; /* count of async writes since mount */ 108 char f_fstypename[MFSNAMELEN]; /* fs type name */ 109 char f_mntonname[MNAMELEN]; /* directory on which mounted */ 110 long f_syncreads; /* count of sync reads since mount */ 111 long f_asyncreads; /* count of async reads since mount */ 112 short f_spares1; /* unused spare */ 113 char f_mntfromname[MNAMELEN];/* mounted filesystem */ 114 short f_spares2; /* unused spare */ 115 long f_spare[2]; /* unused spare */ 116 }; 117 118 #if defined(_KERNEL) || defined(_KERNEL_STRUCTURES) 119 120 /* 121 * bio_ops are associated with the mount structure and used in conjuction 122 * with the b_dep field in a buffer. Currently softupdates and HAMMER 123 * utilize this field. 124 * 125 * All bio_ops callbacks must be MPSAFE and could be called without 126 * the mplock. 127 */ 128 struct buf; 129 130 struct bio_ops { 131 TAILQ_ENTRY(bio_ops) entry; 132 void (*io_start) (struct buf *); 133 void (*io_complete) (struct buf *); 134 void (*io_deallocate) (struct buf *); 135 int (*io_fsync) (struct vnode *); 136 int (*io_sync) (struct mount *); 137 void (*io_movedeps) (struct buf *, struct buf *); 138 int (*io_countdeps) (struct buf *, int); 139 int (*io_checkread) (struct buf *); 140 int (*io_checkwrite) (struct buf *); 141 }; 142 143 #endif 144 145 /* 146 * vfs quota accounting 147 * 148 * uids and gids often come in contiguous blocks; use a small linear 149 * array as the basic in-memory accounting allocation unit 150 */ 151 #define ACCT_CHUNK_BITS 5 152 #define ACCT_CHUNK_NIDS (1<<ACCT_CHUNK_BITS) 153 #define ACCT_CHUNK_MASK (ACCT_CHUNK_NIDS - 1) 154 155 struct ac_counters { 156 uint64_t space; 157 uint64_t limit; 158 }; 159 160 struct ac_unode { 161 RB_ENTRY(ac_unode) rb_entry; 162 uid_t left_bits; 163 struct ac_counters uid_chunk[ACCT_CHUNK_NIDS]; 164 }; 165 166 struct ac_gnode { 167 RB_ENTRY(ac_gnode) rb_entry; 168 gid_t left_bits; 169 struct ac_counters gid_chunk[ACCT_CHUNK_NIDS]; 170 }; 171 172 #if defined(_KERNEL) || defined(_KERNEL_STRUCTURES) 173 174 struct vfs_acct { 175 RB_HEAD(ac_utree,ac_unode) ac_uroot; 176 RB_HEAD(ac_gtree,ac_gnode) ac_groot; 177 uint64_t ac_bytes; /* total bytes used */ 178 uint64_t ac_limit; 179 struct spinlock ac_spin; /* protective spinlock */ 180 }; 181 182 183 /* 184 * Structure per mounted file system. Each mounted file system has an 185 * array of operations and an instance record. The file systems are 186 * put on a doubly linked list. 187 * 188 * NOTE: mnt_nvnodelist and mnt_reservedvnlist. At the moment vnodes 189 * are linked into mnt_nvnodelist. At some point in the near future the 190 * vnode list will be split into a 'dirty' and 'clean' list. mnt_nvnodelist 191 * will become the dirty list and mnt_reservedvnlist will become the 'clean' 192 * list. Filesystem kld's syncing code should remain compatible since 193 * they only need to scan the dirty vnode list (nvnodelist -> dirtyvnodelist). 194 * 195 * NOTE: All VFSs must at least populate mnt_vn_ops or those VOP ops that 196 * only take namecache pointers will not be able to find their operations 197 * vector via namecache->nc_mount. 198 * 199 * MPSAFE NOTES: mnt_lock interlocks mounting and unmounting operations. 200 * 201 * mnt_token interlocks operations which adjust the mount 202 * structure and will also be held through VFS operations 203 * for VFSes not flagged MPSAFE. 204 */ 205 TAILQ_HEAD(vnodelst, vnode); 206 TAILQ_HEAD(journallst, journal); 207 208 struct mount { 209 TAILQ_ENTRY(mount) mnt_list; /* mount list */ 210 struct vfsops *mnt_op; /* operations on fs */ 211 struct vfsconf *mnt_vfc; /* configuration info */ 212 u_int mnt_namecache_gen; /* ++ to clear negative hits */ 213 u_int mnt_unused01; 214 struct vnode *mnt_syncer; /* syncer vnode */ 215 struct syncer_ctx *mnt_syncer_ctx; /* syncer process context */ 216 struct vnodelst mnt_nvnodelist; /* list of vnodes this mount */ 217 TAILQ_HEAD(,vmntvnodescan_info) mnt_vnodescan_list; 218 struct lock mnt_lock; /* mount structure lock */ 219 int mnt_flag; /* flags shared with user */ 220 int mnt_kern_flag; /* kernel only flags */ 221 int mnt_maxsymlinklen; /* max size of short symlink */ 222 struct statfs mnt_stat; /* cache of filesystem stats */ 223 struct statvfs mnt_vstat; /* extended stats */ 224 qaddr_t mnt_data; /* private data */ 225 time_t mnt_time; /* last time written*/ 226 u_int mnt_iosize_max; /* max IO request size */ 227 struct vnodelst mnt_reservedvnlist; /* (future) dirty vnode list */ 228 int mnt_nvnodelistsize; /* # of vnodes on this mount */ 229 230 /* 231 * ops vectors have a fixed stacking order. All primary calls run 232 * through mnt_vn_ops. This field is typically assigned to 233 * mnt_vn_norm_ops. If journaling has been enabled this field is 234 * usually assigned to mnt_vn_journal_ops. 235 */ 236 struct vop_ops *mnt_vn_use_ops; /* current ops set */ 237 238 struct vop_ops *mnt_vn_coherency_ops; /* cache coherency ops */ 239 struct vop_ops *mnt_vn_journal_ops; /* journaling ops */ 240 struct vop_ops *mnt_vn_norm_ops; /* for use by the VFS */ 241 struct vop_ops *mnt_vn_spec_ops; /* for use by the VFS */ 242 struct vop_ops *mnt_vn_fifo_ops; /* for use by the VFS */ 243 struct nchandle mnt_ncmountpt; /* mount point */ 244 struct nchandle mnt_ncmounton; /* mounted on */ 245 int mnt_refs; /* nchandle references */ 246 struct lwkt_token mnt_token; /* token lock if not MPSAFE */ 247 struct journallst mnt_jlist; /* list of active journals */ 248 u_int8_t *mnt_jbitmap; /* streamid bitmap */ 249 int16_t mnt_streamid; /* last streamid */ 250 251 struct bio_ops *mnt_bioops; /* BIO ops (hammer, softupd) */ 252 253 struct vfs_acct mnt_acct; /* vfs space accounting */ 254 }; 255 256 #endif /* _KERNEL || _KERNEL_STRUCTURES */ 257 258 /* 259 * User specifiable flags. 260 */ 261 #define MNT_RDONLY 0x00000001 /* read only filesystem */ 262 #define MNT_SYNCHRONOUS 0x00000002 /* file system written synchronously */ 263 #define MNT_NOEXEC 0x00000004 /* can't exec from filesystem */ 264 #define MNT_NOSUID 0x00000008 /* don't honor setuid bits on fs */ 265 #define MNT_NODEV 0x00000010 /* don't interpret special files */ 266 #define MNT_ASYNC 0x00000040 /* file system written asynchronously */ 267 #define MNT_SUIDDIR 0x00100000 /* special handling of SUID on dirs */ 268 #define MNT_SOFTDEP 0x00200000 /* soft updates being done */ 269 #define MNT_NOSYMFOLLOW 0x00400000 /* do not follow symlinks */ 270 #define MNT_TRIM 0x01000000 /* Enable online FS trimming */ 271 #define MNT_NOATIME 0x10000000 /* disable update of file access time */ 272 #define MNT_NOCLUSTERR 0x40000000 /* disable cluster read */ 273 #define MNT_NOCLUSTERW 0x80000000 /* disable cluster write */ 274 275 /* 276 * NFS export related mount flags. 277 */ 278 #define MNT_EXRDONLY 0x00000080 /* exported read only */ 279 #define MNT_EXPORTED 0x00000100 /* file system is exported */ 280 #define MNT_DEFEXPORTED 0x00000200 /* exported to the world */ 281 #define MNT_EXPORTANON 0x00000400 /* use anon uid mapping for everyone */ 282 #define MNT_EXKERB 0x00000800 /* exported with Kerberos uid mapping */ 283 #define MNT_EXPUBLIC 0x20000000 /* public export (WebNFS) */ 284 285 /* 286 * Flags set by internal operations, 287 * but visible to the user. 288 * XXX some of these are not quite right.. (I've never seen the root flag set) 289 */ 290 #define MNT_LOCAL 0x00001000 /* filesystem is stored locally */ 291 #define MNT_QUOTA 0x00002000 /* quotas are enabled on filesystem */ 292 #define MNT_ROOTFS 0x00004000 /* identifies the root filesystem */ 293 #define MNT_USER 0x00008000 /* mounted by a user */ 294 #define MNT_IGNORE 0x00800000 /* do not show entry in df */ 295 296 /* 297 * Mask of flags that are visible to statfs() 298 * XXX I think that this could now become (~(MNT_CMDFLAGS)) 299 * but the 'mount' program may need changing to handle this. 300 */ 301 #define MNT_VISFLAGMASK (MNT_RDONLY | MNT_SYNCHRONOUS | MNT_NOEXEC | \ 302 MNT_NOSUID | MNT_NODEV | \ 303 MNT_ASYNC | MNT_EXRDONLY | MNT_EXPORTED | \ 304 MNT_DEFEXPORTED | MNT_EXPORTANON| MNT_EXKERB | \ 305 MNT_LOCAL | MNT_USER | MNT_QUOTA | \ 306 MNT_ROOTFS | MNT_NOATIME | MNT_NOCLUSTERR| \ 307 MNT_NOCLUSTERW | MNT_SUIDDIR | MNT_SOFTDEP | \ 308 MNT_IGNORE | MNT_NOSYMFOLLOW | MNT_EXPUBLIC| \ 309 MNT_TRIM) 310 /* 311 * External filesystem command modifier flags. 312 * Unmount can use the MNT_FORCE flag. 313 * XXX These are not STATES and really should be somewhere else. 314 */ 315 #define MNT_UPDATE 0x00010000 /* not a real mount, just an update */ 316 #define MNT_DELEXPORT 0x00020000 /* delete export host lists */ 317 #define MNT_RELOAD 0x00040000 /* reload filesystem data */ 318 #define MNT_FORCE 0x00080000 /* force unmount or readonly change */ 319 #define MNT_CMDFLAGS (MNT_UPDATE|MNT_DELEXPORT|MNT_RELOAD|MNT_FORCE) 320 /* 321 * Internal filesystem control flags stored in mnt_kern_flag. 322 * 323 * MNTK_UNMOUNT locks the mount entry so that name lookup cannot proceed 324 * past the mount point. This keeps the subtree stable during mounts 325 * and unmounts. 326 * 327 * MNTK_UNMOUNTF permits filesystems to detect a forced unmount while 328 * dounmount() is still waiting to lock the mountpoint. This allows 329 * the filesystem to cancel operations that might otherwise deadlock 330 * with the unmount attempt (used by NFS). 331 * 332 * MNTK_NOSTKMNT prevents mounting another filesystem inside the flagged one. 333 */ 334 #define MNTK_UNMOUNTF 0x00000001 /* forced unmount in progress */ 335 #define MNTK_MPSAFE 0x00010000 /* call vops without mnt_token lock */ 336 #define MNTK_RD_MPSAFE 0x00020000 /* vop_read is MPSAFE */ 337 #define MNTK_WR_MPSAFE 0x00040000 /* vop_write is MPSAFE */ 338 #define MNTK_GA_MPSAFE 0x00080000 /* vop_getattr is MPSAFE */ 339 #define MNTK_IN_MPSAFE 0x00100000 /* vop_inactive is MPSAFE */ 340 #define MNTK_SG_MPSAFE 0x00200000 /* vop_strategy is MPSAFE */ 341 #define MNTK_NCALIASED 0x00800000 /* namecached aliased */ 342 #define MNTK_UNMOUNT 0x01000000 /* unmount in progress */ 343 #define MNTK_MWAIT 0x02000000 /* waiting for unmount to finish */ 344 #define MNTK_WANTRDWR 0x04000000 /* upgrade to read/write requested */ 345 #define MNTK_FSMID 0x08000000 /* getattr supports FSMIDs */ 346 #define MNTK_NOSTKMNT 0x10000000 /* no stacked mount point allowed */ 347 #define MNTK_NOMSYNC 0x20000000 /* used by tmpfs */ 348 #define MNTK_THR_SYNC 0x40000000 /* fs sync thread requested */ 349 #define MNTK_ST_MPSAFE 0x80000000 /* (mfs) vfs_start is MPSAFE */ 350 351 #define MNTK_ALL_MPSAFE (MNTK_MPSAFE | MNTK_RD_MPSAFE | MNTK_WR_MPSAFE | \ 352 MNTK_GA_MPSAFE | MNTK_IN_MPSAFE | MNTK_SG_MPSAFE | \ 353 MNTK_ST_MPSAFE) 354 355 /* 356 * mountlist_*() defines 357 */ 358 #define MNTSCAN_FORWARD 0x0001 359 #define MNTSCAN_REVERSE 0x0002 360 #define MNTSCAN_NOBUSY 0x0004 361 362 #define MNTINS_FIRST 0x0001 363 #define MNTINS_LAST 0x0002 364 365 /* 366 * Sysctl CTL_VFS definitions. 367 * 368 * Second level identifier specifies which filesystem. Second level 369 * identifier VFS_VFSCONF returns information about all filesystems. 370 * Second level identifier VFS_GENERIC is non-terminal. 371 */ 372 #define VFS_VFSCONF 0 /* get configured filesystems */ 373 #define VFS_GENERIC 0 /* generic filesystem information */ 374 /* 375 * Third level identifiers for VFS_GENERIC are given below; third 376 * level identifiers for specific filesystems are given in their 377 * mount specific header files. 378 */ 379 #define VFS_MAXTYPENUM 1 /* int: highest defined filesystem type */ 380 #define VFS_CONF 2 /* struct: vfsconf for filesystem given 381 as next argument */ 382 383 /* 384 * VFS MPLOCK helper. 385 */ 386 #define VFS_MPLOCK_DECLARE int xlock_mpsafe 387 388 #define VFS_MPLOCK(mp) VFS_MPLOCK_FLAG(mp, MNTK_MPSAFE) 389 390 #define VFS_MPLOCK_FLAG(mp, flag) \ 391 do { \ 392 if (mp->mnt_kern_flag & flag) { \ 393 xlock_mpsafe = 1; \ 394 } else { \ 395 get_mplock(); /* TEMPORARY */ \ 396 lwkt_gettoken(&mp->mnt_token); \ 397 xlock_mpsafe = 0; \ 398 } \ 399 } while(0) 400 401 #define VFS_MPUNLOCK(mp) \ 402 do { \ 403 if (xlock_mpsafe == 0) { \ 404 lwkt_reltoken(&mp->mnt_token); \ 405 rel_mplock(); /* TEMPORARY */ \ 406 } \ 407 } while(0) 408 409 /* 410 * Flags for various system call interfaces. 411 * 412 * waitfor flags to vfs_sync() and getfsstat() 413 */ 414 #define MNT_WAIT 0x0001 /* synchronously wait for I/O to complete */ 415 #define MNT_NOWAIT 0x0002 /* start all I/O, but do not wait for it */ 416 #define MNT_LAZY 0x0004 /* be lazy and do not necessarily push it all */ 417 418 #define VOP_FSYNC_SYSCALL 0x0001 /* from system call */ 419 420 /* 421 * Generic file handle 422 */ 423 struct fhandle { 424 fsid_t fh_fsid; /* File system id of mount point */ 425 struct fid fh_fid; /* File sys specific id */ 426 }; 427 typedef struct fhandle fhandle_t; 428 429 /* 430 * Export arguments for local filesystem mount calls. 431 */ 432 struct export_args { 433 int ex_flags; /* export related flags */ 434 uid_t ex_root; /* mapping for root uid */ 435 struct ucred ex_anon; /* mapping for anonymous user */ 436 struct sockaddr *ex_addr; /* net address to which exported */ 437 int ex_addrlen; /* and the net address length */ 438 struct sockaddr *ex_mask; /* mask of valid bits in saddr */ 439 int ex_masklen; /* and the smask length */ 440 char *ex_indexfile; /* index file for WebNFS URLs */ 441 }; 442 443 /* 444 * Structure holding information for a publicly exported filesystem 445 * (WebNFS). Currently the specs allow just for one such filesystem. 446 */ 447 struct nfs_public { 448 int np_valid; /* Do we hold valid information */ 449 fhandle_t np_handle; /* Filehandle for pub fs (internal) */ 450 struct mount *np_mount; /* Mountpoint of exported fs */ 451 char *np_index; /* Index file */ 452 }; 453 454 /* 455 * Filesystem configuration information. One of these exists for each 456 * type of filesystem supported by the kernel. These are searched at 457 * mount time to identify the requested filesystem. 458 */ 459 #ifndef _SYS_QUEUE_H_ 460 #include <sys/queue.h> 461 #endif 462 struct vfsconf { 463 struct vfsops *vfc_vfsops; /* filesystem operations vector */ 464 char vfc_name[MFSNAMELEN]; /* filesystem type name */ 465 int vfc_typenum; /* historic filesystem type number */ 466 int vfc_refcount; /* number mounted of this type */ 467 int vfc_flags; /* permanent flags */ 468 STAILQ_ENTRY(vfsconf) vfc_next; /* next in list */ 469 }; 470 471 struct ovfsconf { 472 void *vfc_vfsops; 473 char vfc_name[32]; 474 int vfc_index; 475 int vfc_refcount; 476 int vfc_flags; 477 }; 478 479 /* 480 * NB: these flags refer to IMPLEMENTATION properties, not properties of 481 * any actual mounts; i.e., it does not make sense to change the flags. 482 */ 483 #define VFCF_STATIC 0x00010000 /* statically compiled into kernel */ 484 #define VFCF_NETWORK 0x00020000 /* may get data over the network */ 485 #define VFCF_READONLY 0x00040000 /* writes are not implemented */ 486 #define VFCF_SYNTHETIC 0x00080000 /* data does not represent real files */ 487 #define VFCF_LOOPBACK 0x00100000 /* aliases some other mounted FS */ 488 #define VFCF_UNICODE 0x00200000 /* stores file names as Unicode*/ 489 490 #ifdef _KERNEL 491 492 #ifdef MALLOC_DECLARE 493 MALLOC_DECLARE(M_MOUNT); 494 #endif 495 extern int nfs_mount_type; /* vfc_typenum for nfs, or -1 */ 496 497 struct vfsconf *vfsconf_find_by_name(const char *); 498 struct vfsconf *vfsconf_find_by_typenum(int); 499 int vfsconf_get_maxtypenum(void); 500 int vfsconf_each(int (*)(struct vfsconf *, void *), void *); 501 502 #endif 503 504 #if defined(_KERNEL) || defined(_KERNEL_STRUCTURES) 505 506 TAILQ_HEAD(mntlist, mount); /* struct mntlist */ 507 508 /* 509 * Operations supported on mounted file system. 510 */ 511 struct nlookupdata; 512 struct nlookupdata; 513 struct mbuf; 514 515 typedef int vfs_mount_t(struct mount *mp, char *path, caddr_t data, 516 struct ucred *cred); 517 typedef int vfs_start_t(struct mount *mp, int flags); 518 typedef int vfs_unmount_t(struct mount *mp, int mntflags); 519 typedef int vfs_root_t(struct mount *mp, struct vnode **vpp); 520 typedef int vfs_quotactl_t(struct mount *mp, int cmds, uid_t uid, caddr_t arg, 521 struct ucred *cred); 522 typedef int vfs_statfs_t(struct mount *mp, struct statfs *sbp, 523 struct ucred *cred); 524 typedef int vfs_statvfs_t(struct mount *mp, struct statvfs *sbp, 525 struct ucred *cred); 526 typedef int vfs_sync_t(struct mount *mp, int waitfor); 527 typedef int vfs_vget_t(struct mount *mp, struct vnode *dvp, 528 ino_t ino, struct vnode **vpp); 529 typedef int vfs_fhtovp_t(struct mount *mp, struct vnode *rootvp, 530 struct fid *fhp, struct vnode **vpp); 531 typedef int vfs_checkexp_t(struct mount *mp, struct sockaddr *nam, 532 int *extflagsp, struct ucred **credanonp); 533 typedef int vfs_vptofh_t(struct vnode *vp, struct fid *fhp); 534 typedef int vfs_init_t(struct vfsconf *); 535 typedef int vfs_uninit_t(struct vfsconf *); 536 typedef int vfs_extattrctl_t(struct mount *mp, int cmd, struct vnode *vp, 537 int attrnamespace, const char *attrname, 538 struct ucred *cred); 539 typedef int vfs_acinit_t(struct mount *mp); 540 typedef void vfs_acdone_t(struct mount *mp); 541 typedef void vfs_account_t(struct mount *mp, 542 uid_t uid, gid_t gid, int64_t delta); 543 typedef void vfs_ncpgen_set_t(struct mount *mp, struct namecache *ncp); 544 typedef int vfs_ncpgen_test_t(struct mount *mp, struct namecache *ncp); 545 546 int vfs_mount(struct mount *mp, char *path, caddr_t data, struct ucred *cred); 547 int vfs_start(struct mount *mp, int flags); 548 int vfs_unmount(struct mount *mp, int mntflags); 549 int vfs_root(struct mount *mp, struct vnode **vpp); 550 int vfs_quotactl(struct mount *mp, int cmds, uid_t uid, caddr_t arg, 551 struct ucred *cred); 552 int vfs_statfs(struct mount *mp, struct statfs *sbp, struct ucred *cred); 553 int vfs_statvfs(struct mount *mp, struct statvfs *sbp, struct ucred *cred); 554 int vfs_sync(struct mount *mp, int waitfor); 555 int vfs_vget(struct mount *mp, struct vnode *dvp, 556 ino_t ino, struct vnode **vpp); 557 int vfs_fhtovp(struct mount *mp, struct vnode *rootvp, 558 struct fid *fhp, struct vnode **vpp); 559 int vfs_checkexp(struct mount *mp, struct sockaddr *nam, 560 int *extflagsp, struct ucred **credanonp); 561 int vfs_vptofh(struct vnode *vp, struct fid *fhp); 562 int vfs_init(struct vfsconf *vfc); 563 int vfs_uninit(struct vfsconf *vfc, struct vfsconf *vfsp); 564 int vfs_extattrctl(struct mount *mp, int cmd, struct vnode *vp, 565 int attrnamespace, const char *attrname, 566 struct ucred *cred); 567 568 569 struct vfsops { 570 vfs_mount_t *vfs_mount; 571 vfs_start_t *vfs_start; 572 vfs_unmount_t *vfs_unmount; 573 vfs_root_t *vfs_root; 574 vfs_quotactl_t *vfs_quotactl; 575 vfs_statfs_t *vfs_statfs; 576 vfs_sync_t *vfs_sync; 577 vfs_vget_t *vfs_vget; 578 vfs_fhtovp_t *vfs_fhtovp; 579 vfs_checkexp_t *vfs_checkexp; 580 vfs_vptofh_t *vfs_vptofh; 581 vfs_init_t *vfs_init; 582 vfs_uninit_t *vfs_uninit; 583 vfs_extattrctl_t *vfs_extattrctl; 584 vfs_statvfs_t *vfs_statvfs; 585 vfs_acinit_t *vfs_acinit; 586 vfs_acdone_t *vfs_acdone; 587 vfs_account_t *vfs_account; 588 vfs_ncpgen_set_t *vfs_ncpgen_set; 589 vfs_ncpgen_test_t *vfs_ncpgen_test; 590 }; 591 592 #define VFS_MOUNT(MP, PATH, DATA, CRED) \ 593 vfs_mount(MP, PATH, DATA, CRED) 594 #define VFS_START(MP, FLAGS) \ 595 vfs_start(MP, FLAGS) 596 #define VFS_UNMOUNT(MP, FORCE) \ 597 vfs_unmount(MP, FORCE) 598 #define VFS_ROOT(MP, VPP) \ 599 vfs_root(MP, VPP) 600 #define VFS_QUOTACTL(MP, C, U, A, CRED) \ 601 vfs_quotactl(MP, C, U, A, CRED) 602 #define VFS_STATFS(MP, SBP, CRED) \ 603 vfs_statfs(MP, SBP, CRED) 604 #define VFS_STATVFS(MP, SBP, CRED) \ 605 vfs_statvfs(MP, SBP, CRED) 606 #define VFS_SYNC(MP, WAIT) \ 607 vfs_sync(MP, WAIT) 608 #define VFS_VGET(MP, DVP, INO, VPP) \ 609 vfs_vget(MP, DVP, INO, VPP) 610 #define VFS_FHTOVP(MP, ROOTVP, FIDP, VPP) \ 611 vfs_fhtovp(MP, ROOTVP, FIDP, VPP) 612 #define VFS_VPTOFH(VP, FIDP) \ 613 vfs_vptofh(VP, FIDP) 614 #define VFS_CHECKEXP(MP, NAM, EXFLG, CRED) \ 615 vfs_checkexp(MP, NAM, EXFLG, CRED) 616 #define VFS_EXTATTRCTL(MP, C, FVP, NS, N, CRED) \ 617 vfs_extattrctl(MP, C, FVP, NS, N, CRED) 618 #define VFS_ACCOUNT(MP, U, G, D) \ 619 if ((MP->mnt_op->vfs_account != NULL) && (D != 0)) \ 620 MP->mnt_op->vfs_account(MP, U, G, D); 621 #define VFS_ACINIT(MP, ERROR) \ 622 if (vfs_quota_enabled && MP->mnt_op->vfs_acinit != NULL) \ 623 ERROR = MP->mnt_op->vfs_acinit(MP); 624 #define VFS_ACDONE(MP) \ 625 if (vfs_quota_enabled && MP->mnt_op->vfs_acdone != NULL) \ 626 MP->mnt_op->vfs_acdone(MP); 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_inethead; /* IPv4 radix */ 677 struct radix_node_head *ne_inet6head; /* IPv6 radix */ 678 struct radix_node_head *ne_maskhead; /* Shared mask radix */ 679 }; 680 #define NE_LOCK(nep) lwkt_getpooltoken(nep) 681 #define NE_UNLOCK(nep) lwkt_relpooltoken(nep) 682 #define NE_ASSERT_LOCKED(nep) \ 683 ASSERT_LWKT_TOKEN_HELD(lwkt_token_pool_lookup(nep)) 684 685 #endif 686 687 #ifdef _KERNEL 688 689 extern char *mountrootfsname; 690 691 /* 692 * exported vnode operations 693 */ 694 int dounmount (struct mount *, int); 695 int vfs_setpublicfs /* set publicly exported fs */ 696 (struct mount *, struct netexport *, const struct export_args *); 697 int vfs_lock (struct mount *); /* lock a vfs */ 698 void vfs_msync (struct mount *, int); 699 void vfs_unlock (struct mount *); /* unlock a vfs */ 700 int vfs_busy (struct mount *, int); 701 int vfs_export /* process mount export info */ 702 (struct mount *, struct netexport *, const struct export_args *); 703 struct netcred *vfs_export_lookup /* lookup host in fs export list */ 704 (struct mount *, struct netexport *, struct sockaddr *); 705 int vfs_allocate_syncvnode (struct mount *); 706 void vfs_getnewfsid (struct mount *); 707 int vfs_setfsid(struct mount *mp, fsid_t *template); 708 cdev_t vfs_getrootfsid (struct mount *); 709 struct mount *vfs_getvfs (fsid_t *); /* return vfs given fsid */ 710 int vfs_modevent (module_t, int, void *); 711 int vfs_mountedon (struct vnode *); /* is a vfs mounted on vp */ 712 int vfs_rootmountalloc (char *, char *, struct mount **); 713 void vfs_unbusy (struct mount *); 714 void vfs_unmountall (void); 715 int vfs_register (struct vfsconf *); 716 int vfs_unregister (struct vfsconf *); 717 extern struct nfs_public nfs_pub; 718 719 /* 720 * Declarations for these vfs default operations are located in 721 * kern/vfs_default.c, they should be used instead of making "dummy" 722 * functions or casting entries in the VFS op table to "enopnotsupp()". 723 */ 724 vfs_start_t vfs_stdstart; 725 vfs_root_t vfs_stdroot; 726 vfs_quotactl_t vfs_stdquotactl; 727 vfs_statfs_t vfs_stdstatfs; 728 vfs_statvfs_t vfs_stdstatvfs; 729 vfs_sync_t vfs_stdsync; 730 vfs_sync_t vfs_stdnosync; 731 vfs_vget_t vfs_stdvget; 732 vfs_fhtovp_t vfs_stdfhtovp; 733 vfs_checkexp_t vfs_stdcheckexp; 734 vfs_vptofh_t vfs_stdvptofh; 735 vfs_init_t vfs_stdinit; 736 vfs_uninit_t vfs_stduninit; 737 vfs_extattrctl_t vfs_stdextattrctl; 738 vfs_acinit_t vfs_stdac_init; 739 vfs_acdone_t vfs_stdac_done; 740 vfs_account_t vfs_stdaccount; 741 vfs_account_t vfs_noaccount; 742 vfs_ncpgen_set_t vfs_stdncpgen_set; 743 vfs_ncpgen_test_t vfs_stdncpgen_test; 744 745 struct vop_access_args; 746 int vop_helper_access(struct vop_access_args *ap, uid_t ino_uid, gid_t ino_gid, 747 mode_t ino_mode, u_int32_t ino_flags); 748 int vop_helper_setattr_flags(u_int32_t *ino_flags, u_int32_t vaflags, 749 uid_t uid, struct ucred *cred); 750 uid_t vop_helper_create_uid(struct mount *mp, mode_t dmode, uid_t duid, 751 struct ucred *cred, mode_t *modep); 752 int vop_helper_chmod(struct vnode *vp, mode_t new_mode, struct ucred *cred, 753 uid_t cur_uid, gid_t cur_gid, mode_t *cur_modep); 754 int vop_helper_chown(struct vnode *vp, uid_t new_uid, gid_t new_gid, 755 struct ucred *cred, 756 uid_t *cur_uidp, gid_t *cur_gidp, mode_t *cur_modep); 757 int vop_helper_read_shortcut(struct vop_read_args *ap); 758 759 void add_bio_ops(struct bio_ops *ops); 760 void rem_bio_ops(struct bio_ops *ops); 761 762 int journal_mountctl(struct vop_mountctl_args *ap); 763 void journal_remove_all_journals(struct mount *mp, int flags); 764 765 void mountlist_insert(struct mount *, int); 766 int mountlist_interlock(int (*callback)(struct mount *), struct mount *); 767 struct mount *mountlist_boot_getfirst(void); 768 void mountlist_remove(struct mount *mp); 769 int mountlist_exists(struct mount *mp); 770 int mountlist_scan(int (*callback)(struct mount *, void *), void *, int); 771 struct mount *mount_get_by_nc(struct namecache *ncp); 772 #else /* !_KERNEL */ 773 774 #include <sys/cdefs.h> 775 776 __BEGIN_DECLS 777 int fstatfs (int, struct statfs *); 778 int getfh (const char *, fhandle_t *); 779 int getfsstat (struct statfs *, long, int); 780 int getmntinfo (struct statfs **, int); 781 int getmntvinfo (struct statfs **, struct statvfs **, int); 782 int mount (const char *, const char *, int, void *); 783 int statfs (const char *, struct statfs *); 784 int unmount (const char *, int); 785 int fhopen (const struct fhandle *, int); 786 int fhstat (const struct fhandle *, struct stat *); 787 int fhstatfs (const struct fhandle *, struct statfs *); 788 789 /* C library stuff */ 790 void endvfsent (void); 791 struct ovfsconf *getvfsbyname (const char *); 792 struct ovfsconf *getvfsbytype (int); 793 struct ovfsconf *getvfsent (void); 794 #define getvfsbyname new_getvfsbyname 795 int new_getvfsbyname (const char *, struct vfsconf *); 796 void setvfsent (int); 797 int vfsisloadable (const char *); 798 int vfsload (const char *); 799 __END_DECLS 800 801 #endif /* _KERNEL */ 802 803 #endif /* !_SYS_MOUNT_H_ */ 804 805