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/mplock2.h> 37 #include <sys/queue.h> 38 #include <sys/tree.h> 39 #include <sys/ucred.h> 40 41 #ifndef _KERNEL 42 #if !defined(_POSIX_C_SOURCE) && !defined(_XOPEN_SOURCE) 43 #include <sys/stat.h> 44 #endif /* !_POSIX_C_SOURCE */ 45 #endif /* !_KERNEL */ 46 47 #if defined(_KERNEL) || defined(_KERNEL_STRUCTURES) 48 #ifndef _SYS_LOCK_H_ 49 #include <sys/lock.h> 50 #endif 51 #ifndef _SYS_NAMECACHE_H_ 52 #include <sys/namecache.h> 53 #endif 54 #ifndef _SYS_STATVFS_H_ 55 #include <sys/statvfs.h> 56 #endif 57 #ifndef _SYS_THREAD_H_ 58 #include <sys/thread.h> 59 #endif 60 #include <sys/vfs_quota.h> 61 #endif 62 63 struct thread; 64 struct journal; 65 struct vop_ops; 66 struct vop_mountctl_args; 67 struct statvfs; 68 struct vmntvnodescan_info; 69 70 typedef struct fsid { int32_t val[2]; } fsid_t; /* file system id type */ 71 72 /* 73 * File identifier. These are unique per filesystem on a single machine. 74 * 75 * fix_ext is also used by HAMMER. 76 */ 77 #define MAXFIDSZ 16 78 79 struct fid { 80 u_short fid_len; /* length of data in bytes */ 81 u_short fid_ext; /* extended data */ 82 char fid_data[MAXFIDSZ]; /* data (variable length) */ 83 } __packed; 84 85 /* 86 * file system statistics 87 */ 88 89 #define MFSNAMELEN 16 /* length of fs type name, including null */ 90 #define MNAMELEN 80 /* length of buffer for returned name */ 91 92 struct statfs { 93 long f_spare2; /* placeholder */ 94 long f_bsize; /* fundamental file system block size */ 95 long f_iosize; /* optimal transfer block size */ 96 long f_blocks; /* total data blocks in file system */ 97 long f_bfree; /* free blocks in fs */ 98 long f_bavail; /* free blocks avail to non-superuser */ 99 long f_files; /* total file nodes in file system */ 100 long f_ffree; /* free file nodes in fs */ 101 fsid_t f_fsid; /* file system id */ 102 uid_t f_owner; /* user that mounted the filesystem */ 103 int f_type; /* type of filesystem */ 104 int f_flags; /* copy of mount exported flags */ 105 long f_syncwrites; /* count of sync writes since mount */ 106 long f_asyncwrites; /* count of async writes since mount */ 107 char f_fstypename[MFSNAMELEN]; /* fs type name */ 108 char f_mntonname[MNAMELEN]; /* directory on which mounted */ 109 long f_syncreads; /* count of sync reads since mount */ 110 long f_asyncreads; /* count of async reads since mount */ 111 short f_spares1; /* unused spare */ 112 char f_mntfromname[MNAMELEN];/* mounted filesystem */ 113 short f_spares2; /* unused spare */ 114 long f_spare[2]; /* unused spare */ 115 }; 116 117 #if defined(_KERNEL) || defined(_KERNEL_STRUCTURES) 118 119 /* 120 * bio_ops are associated with the mount structure and used in conjuction 121 * with the b_dep field in a buffer. Currently softupdates and HAMMER 122 * utilize this field. 123 * 124 * All bio_ops callbacks must be MPSAFE and could be called without 125 * the mplock. 126 */ 127 struct buf; 128 129 struct bio_ops { 130 TAILQ_ENTRY(bio_ops) entry; 131 void (*io_start) (struct buf *); 132 void (*io_complete) (struct buf *); 133 void (*io_deallocate) (struct buf *); 134 int (*io_fsync) (struct vnode *); 135 int (*io_sync) (struct mount *); 136 void (*io_movedeps) (struct buf *, struct buf *); 137 int (*io_countdeps) (struct buf *, int); 138 int (*io_checkread) (struct buf *); 139 int (*io_checkwrite) (struct buf *); 140 }; 141 142 #endif 143 144 /* 145 * vfs quota accounting 146 * 147 * uids and gids often come in contiguous blocks; use a small linear 148 * array as the basic in-memory accounting allocation unit 149 */ 150 #define ACCT_CHUNK_BITS 5 151 #define ACCT_CHUNK_NIDS (1<<ACCT_CHUNK_BITS) 152 #define ACCT_CHUNK_MASK (ACCT_CHUNK_NIDS - 1) 153 154 struct ac_counters { 155 uint64_t space; 156 uint64_t limit; 157 }; 158 159 struct ac_unode { 160 RB_ENTRY(ac_unode) rb_entry; 161 uid_t left_bits; 162 struct ac_counters uid_chunk[ACCT_CHUNK_NIDS]; 163 }; 164 165 struct ac_gnode { 166 RB_ENTRY(ac_gnode) rb_entry; 167 gid_t left_bits; 168 struct ac_counters gid_chunk[ACCT_CHUNK_NIDS]; 169 }; 170 171 #if defined(_KERNEL) || defined(_KERNEL_STRUCTURES) 172 173 struct vfs_acct { 174 RB_HEAD(ac_utree,ac_unode) ac_uroot; 175 RB_HEAD(ac_gtree,ac_gnode) ac_groot; 176 uint64_t ac_bytes; /* total bytes used */ 177 uint64_t ac_limit; 178 struct spinlock ac_spin; /* protective spinlock */ 179 }; 180 181 182 /* 183 * Structure per mounted file system. Each mounted file system has an 184 * array of operations and an instance record. The file systems are 185 * put on a doubly linked list. 186 * 187 * NOTE: mnt_nvnodelist and mnt_reservedvnlist. At the moment vnodes 188 * are linked into mnt_nvnodelist. At some point in the near future the 189 * vnode list will be split into a 'dirty' and 'clean' list. mnt_nvnodelist 190 * will become the dirty list and mnt_reservedvnlist will become the 'clean' 191 * list. Filesystem kld's syncing code should remain compatible since 192 * they only need to scan the dirty vnode list (nvnodelist -> dirtyvnodelist). 193 * 194 * NOTE: All VFSs must at least populate mnt_vn_ops or those VOP ops that 195 * only take namecache pointers will not be able to find their operations 196 * vector via namecache->nc_mount. 197 * 198 * MPSAFE NOTES: mnt_lock interlocks mounting and unmounting operations. 199 * 200 * mnt_token interlocks operations which adjust the mount 201 * structure and will also be held through VFS operations 202 * for VFSes not flagged MPSAFE. 203 * 204 * The VFS should pre-set VFCF_MPSAFE in the VFS_SET() to 205 * avoid use of the mplock during mounting. This will also 206 * cause MNTK_ALL_MPSAFE to be set in mnt_kern_flags. If the 207 * VFS does not set VFCF_MPSAFE then it can set individual 208 * MNTK_*_MPSAFE flags in mnt_kern_flags. 209 */ 210 TAILQ_HEAD(vnodelst, vnode); 211 TAILQ_HEAD(journallst, journal); 212 213 struct mount { 214 TAILQ_ENTRY(mount) mnt_list; /* mount list */ 215 struct vfsops *mnt_op; /* operations on fs */ 216 struct vfsconf *mnt_vfc; /* configuration info */ 217 u_int mnt_namecache_gen; /* ++ to clear negative hits */ 218 u_int mnt_pbuf_count; /* pbuf usage limit */ 219 struct vnode *mnt_syncer; /* syncer vnode */ 220 struct syncer_ctx *mnt_syncer_ctx; /* syncer process context */ 221 struct vnodelst mnt_nvnodelist; /* list of vnodes this mount */ 222 TAILQ_HEAD(,vmntvnodescan_info) mnt_vnodescan_list; 223 struct lock mnt_lock; /* mount structure lock */ 224 int mnt_flag; /* flags shared with user */ 225 int mnt_kern_flag; /* kernel only flags */ 226 int mnt_maxsymlinklen; /* max size of short symlink */ 227 struct statfs mnt_stat; /* cache of filesystem stats */ 228 struct statvfs mnt_vstat; /* extended stats */ 229 qaddr_t mnt_data; /* private data */ 230 time_t mnt_time; /* last time written*/ 231 u_int mnt_iosize_max; /* max IO request size */ 232 struct vnodelst mnt_reservedvnlist; /* (future) dirty vnode list */ 233 int mnt_nvnodelistsize; /* # of vnodes on this mount */ 234 235 /* 236 * ops vectors have a fixed stacking order. All primary calls run 237 * through mnt_vn_ops. This field is typically assigned to 238 * mnt_vn_norm_ops. If journaling has been enabled this field is 239 * usually assigned to mnt_vn_journal_ops. 240 */ 241 struct vop_ops *mnt_vn_use_ops; /* current ops set */ 242 243 struct vop_ops *mnt_vn_coherency_ops; /* cache coherency ops */ 244 struct vop_ops *mnt_vn_journal_ops; /* journaling ops */ 245 struct vop_ops *mnt_vn_norm_ops; /* for use by the VFS */ 246 struct vop_ops *mnt_vn_spec_ops; /* for use by the VFS */ 247 struct vop_ops *mnt_vn_fifo_ops; /* for use by the VFS */ 248 struct nchandle mnt_ncmountpt; /* mount point */ 249 struct nchandle mnt_ncmounton; /* mounted on */ 250 char mnt_pad[16]; /* (try to cache-align refs) */ 251 struct ucred *mnt_cred; /* for cr_prison */ 252 int mnt_refs; /* nchandle references */ 253 int mnt_hold; /* prevent kfree */ 254 struct lwkt_token mnt_token; /* token lock if not MPSAFE */ 255 struct journallst mnt_jlist; /* list of active journals */ 256 u_int8_t *mnt_jbitmap; /* streamid bitmap */ 257 int16_t mnt_streamid; /* last streamid */ 258 259 struct bio_ops *mnt_bioops; /* BIO ops (hammer, softupd) */ 260 261 struct vfs_acct mnt_acct; /* vfs space accounting */ 262 RB_ENTRY(mount) mnt_node; /* mnt_stat.f_fsid */ 263 }; 264 265 #endif /* _KERNEL || _KERNEL_STRUCTURES */ 266 267 /* 268 * User specifiable flags. 269 */ 270 #define MNT_RDONLY 0x00000001 /* read only filesystem */ 271 #define MNT_SYNCHRONOUS 0x00000002 /* file system written synchronously */ 272 #define MNT_NOEXEC 0x00000004 /* can't exec from filesystem */ 273 #define MNT_NOSUID 0x00000008 /* don't honor setuid bits on fs */ 274 #define MNT_NODEV 0x00000010 /* don't interpret special files */ 275 #define MNT_AUTOMOUNTED 0x00000020 /* mounted by automountd(8) */ 276 #define MNT_ASYNC 0x00000040 /* file system written asynchronously */ 277 #define MNT_SUIDDIR 0x00100000 /* special handling of SUID on dirs */ 278 #define MNT_SOFTDEP 0x00200000 /* soft updates being done */ 279 #define MNT_NOSYMFOLLOW 0x00400000 /* do not follow symlinks */ 280 #define MNT_TRIM 0x01000000 /* Enable online FS trimming */ 281 #define MNT_NOATIME 0x10000000 /* disable update of file access time */ 282 #define MNT_NOCLUSTERR 0x40000000 /* disable cluster read */ 283 #define MNT_NOCLUSTERW 0x80000000 /* disable cluster write */ 284 285 /* 286 * NFS export related mount flags. 287 */ 288 #define MNT_EXRDONLY 0x00000080 /* exported read only */ 289 #define MNT_EXPORTED 0x00000100 /* file system is exported */ 290 #define MNT_DEFEXPORTED 0x00000200 /* exported to the world */ 291 #define MNT_EXPORTANON 0x00000400 /* use anon uid mapping for everyone */ 292 #define MNT_EXKERB 0x00000800 /* exported with Kerberos uid mapping */ 293 #define MNT_EXPUBLIC 0x20000000 /* public export (WebNFS) */ 294 295 /* 296 * Flags set by internal operations, 297 * but visible to the user. 298 * XXX some of these are not quite right.. (I've never seen the root flag set) 299 */ 300 #define MNT_LOCAL 0x00001000 /* filesystem is stored locally */ 301 #define MNT_QUOTA 0x00002000 /* quotas are enabled on filesystem */ 302 #define MNT_ROOTFS 0x00004000 /* identifies the root filesystem */ 303 #define MNT_USER 0x00008000 /* mounted by a user */ 304 #define MNT_IGNORE 0x00800000 /* do not show entry in df */ 305 306 /* 307 * Mask of flags that are visible to statfs() 308 * XXX I think that this could now become (~(MNT_CMDFLAGS)) 309 * but the 'mount' program may need changing to handle this. 310 */ 311 #define MNT_VISFLAGMASK (MNT_RDONLY | MNT_SYNCHRONOUS | MNT_NOEXEC | \ 312 MNT_NOSUID | MNT_NODEV | \ 313 MNT_ASYNC | MNT_EXRDONLY | MNT_EXPORTED | \ 314 MNT_DEFEXPORTED | MNT_EXPORTANON| MNT_EXKERB | \ 315 MNT_LOCAL | MNT_USER | MNT_QUOTA | \ 316 MNT_ROOTFS | MNT_NOATIME | MNT_NOCLUSTERR| \ 317 MNT_NOCLUSTERW | MNT_SUIDDIR | MNT_SOFTDEP | \ 318 MNT_IGNORE | MNT_NOSYMFOLLOW | MNT_EXPUBLIC| \ 319 MNT_TRIM | MNT_AUTOMOUNTED) 320 /* 321 * External filesystem command modifier flags. 322 * Unmount can use the MNT_FORCE flag. 323 * XXX These are not STATES and really should be somewhere else. 324 */ 325 #define MNT_UPDATE 0x00010000 /* not a real mount, just an update */ 326 #define MNT_DELEXPORT 0x00020000 /* delete export host lists */ 327 #define MNT_RELOAD 0x00040000 /* reload filesystem data */ 328 #define MNT_FORCE 0x00080000 /* force unmount or readonly change */ 329 #define MNT_CMDFLAGS (MNT_UPDATE|MNT_DELEXPORT|MNT_RELOAD|MNT_FORCE) 330 /* 331 * Internal filesystem control flags stored in mnt_kern_flag. 332 * 333 * MNTK_UNMOUNT locks the mount entry so that name lookup cannot proceed 334 * past the mount point. This keeps the subtree stable during mounts 335 * and unmounts. 336 * 337 * MNTK_UNMOUNTF permits filesystems to detect a forced unmount while 338 * dounmount() is still waiting to lock the mountpoint. This allows 339 * the filesystem to cancel operations that might otherwise deadlock 340 * with the unmount attempt (used by NFS). 341 * 342 * MNTK_NOSTKMNT prevents mounting another filesystem inside the flagged one. 343 */ 344 #define MNTK_UNMOUNTF 0x00000001 /* forced unmount in progress */ 345 #define MNTK_QUICKHALT 0x00008000 /* quick unmount on halt */ 346 #define MNTK_MPSAFE 0x00010000 /* call vops without mnt_token lock */ 347 #define MNTK_RD_MPSAFE 0x00020000 /* vop_read is MPSAFE */ 348 #define MNTK_WR_MPSAFE 0x00040000 /* vop_write is MPSAFE */ 349 #define MNTK_GA_MPSAFE 0x00080000 /* vop_getattr is MPSAFE */ 350 #define MNTK_IN_MPSAFE 0x00100000 /* vop_inactive is MPSAFE */ 351 #define MNTK_SG_MPSAFE 0x00200000 /* vop_strategy is MPSAFE */ 352 #define MNTK_NCALIASED 0x00800000 /* namecached aliased */ 353 #define MNTK_UNMOUNT 0x01000000 /* unmount in progress */ 354 #define MNTK_MWAIT 0x02000000 /* waiting for unmount to finish */ 355 #define MNTK_WANTRDWR 0x04000000 /* upgrade to read/write requested */ 356 #define MNTK_FSMID 0x08000000 /* getattr supports FSMIDs */ 357 #define MNTK_NOSTKMNT 0x10000000 /* no stacked mount point allowed */ 358 #define MNTK_NOMSYNC 0x20000000 /* used by tmpfs */ 359 #define MNTK_THR_SYNC 0x40000000 /* fs sync thread requested */ 360 #define MNTK_ST_MPSAFE 0x80000000 /* (mfs) vfs_start is MPSAFE */ 361 362 #define MNTK_ALL_MPSAFE (MNTK_MPSAFE | MNTK_RD_MPSAFE | MNTK_WR_MPSAFE | \ 363 MNTK_GA_MPSAFE | MNTK_IN_MPSAFE | MNTK_SG_MPSAFE | \ 364 MNTK_ST_MPSAFE) 365 366 /* 367 * mountlist_*() defines 368 */ 369 #define MNTSCAN_FORWARD 0x0001 370 #define MNTSCAN_REVERSE 0x0002 371 #define MNTSCAN_NOBUSY 0x0004 372 #define MNTSCAN_NOUNLOCK 0x0008 373 374 #define MNTINS_FIRST 0x0001 375 #define MNTINS_LAST 0x0002 376 377 /* 378 * Sysctl CTL_VFS definitions. 379 * 380 * Second level identifier specifies which filesystem. Second level 381 * identifier VFS_VFSCONF returns information about all filesystems. 382 * Second level identifier VFS_GENERIC is non-terminal. 383 */ 384 #define VFS_VFSCONF 0 /* get configured filesystems */ 385 #define VFS_GENERIC 0 /* generic filesystem information */ 386 /* 387 * Third level identifiers for VFS_GENERIC are given below; third 388 * level identifiers for specific filesystems are given in their 389 * mount specific header files. 390 */ 391 #define VFS_MAXTYPENUM 1 /* int: highest defined filesystem type */ 392 #define VFS_CONF 2 /* struct: vfsconf for filesystem given 393 as next argument */ 394 395 /* 396 * VFS MPLOCK helper. 397 * 398 * We have to cache the supplied mp because in certain situations 399 * the related vnode might go away across the use case (vop_strategy()). 400 */ 401 #define VFS_MPLOCK_DECLARE struct mount *xlock_mp 402 403 #define VFS_MPLOCK(mp) VFS_MPLOCK_FLAG(mp, MNTK_MPSAFE) 404 405 #define VFS_MPLOCK_FLAG(mp, flag) \ 406 do { \ 407 if (mp->mnt_kern_flag & flag) { \ 408 xlock_mp = NULL; \ 409 } else { \ 410 xlock_mp = (mp); \ 411 get_mplock(); /* TEMPORARY */ \ 412 lwkt_gettoken(&xlock_mp->mnt_token); \ 413 } \ 414 } while(0) 415 416 #define VFS_MPUNLOCK() \ 417 do { \ 418 if (xlock_mp) { \ 419 lwkt_reltoken(&xlock_mp->mnt_token); \ 420 rel_mplock(); /* TEMPORARY */ \ 421 } \ 422 } while(0) 423 424 /* 425 * Flags for various system call interfaces. 426 * 427 * waitfor flags to vfs_sync() and getfsstat() 428 */ 429 #define MNT_WAIT 0x0001 /* synchronously wait for I/O to complete */ 430 #define MNT_NOWAIT 0x0002 /* start all I/O, but do not wait for it */ 431 #define MNT_LAZY 0x0004 /* be lazy and do not necessarily push it all */ 432 433 #define VOP_FSYNC_SYSCALL 0x0001 /* from system call */ 434 435 /* 436 * Generic file handle 437 */ 438 struct fhandle { 439 fsid_t fh_fsid; /* File system id of mount point */ 440 struct fid fh_fid; /* File sys specific id */ 441 }; 442 typedef struct fhandle fhandle_t; 443 444 /* 445 * Export arguments for local filesystem mount calls. 446 */ 447 struct export_args { 448 int ex_flags; /* export related flags */ 449 uid_t ex_root; /* mapping for root uid */ 450 struct ucred ex_anon; /* mapping for anonymous user */ 451 struct sockaddr *ex_addr; /* net address to which exported */ 452 int ex_addrlen; /* and the net address length */ 453 struct sockaddr *ex_mask; /* mask of valid bits in saddr */ 454 int ex_masklen; /* and the smask length */ 455 char *ex_indexfile; /* index file for WebNFS URLs */ 456 }; 457 458 /* 459 * Structure holding information for a publicly exported filesystem 460 * (WebNFS). Currently the specs allow just for one such filesystem. 461 */ 462 struct nfs_public { 463 int np_valid; /* Do we hold valid information */ 464 fhandle_t np_handle; /* Filehandle for pub fs (internal) */ 465 struct mount *np_mount; /* Mountpoint of exported fs */ 466 char *np_index; /* Index file */ 467 }; 468 469 /* 470 * Filesystem configuration information. One of these exists for each 471 * type of filesystem supported by the kernel. These are searched at 472 * mount time to identify the requested filesystem. 473 */ 474 struct vfsconf { 475 struct vfsops *vfc_vfsops; /* filesystem operations vector */ 476 char vfc_name[MFSNAMELEN]; /* filesystem type name */ 477 int vfc_typenum; /* historic filesystem type number */ 478 int vfc_refcount; /* number mounted of this type */ 479 int vfc_flags; /* permanent flags */ 480 STAILQ_ENTRY(vfsconf) vfc_next; /* next in list */ 481 }; 482 483 struct ovfsconf { 484 void *vfc_vfsops; 485 char vfc_name[32]; 486 int vfc_index; 487 int vfc_refcount; 488 int vfc_flags; 489 }; 490 491 /* 492 * NB: these flags refer to IMPLEMENTATION properties, not properties of 493 * any actual mounts; i.e., it does not make sense to change the flags. 494 */ 495 #define VFCF_STATIC 0x00010000 /* statically compiled into kernel */ 496 #define VFCF_NETWORK 0x00020000 /* may get data over the network */ 497 #define VFCF_READONLY 0x00040000 /* writes are not implemented */ 498 #define VFCF_SYNTHETIC 0x00080000 /* data does not represent real files */ 499 #define VFCF_LOOPBACK 0x00100000 /* aliases some other mounted FS */ 500 #define VFCF_UNICODE 0x00200000 /* stores file names as Unicode*/ 501 #define VFCF_MPSAFE 0x00400000 /* VFS is fully MPSAFE */ 502 503 /* vfsquery flags */ 504 #define VQ_NOTRESP 0x0001 /* server down */ 505 #define VQ_NEEDAUTH 0x0002 /* server bad auth */ 506 #define VQ_LOWDISK 0x0004 /* we're low on space */ 507 #define VQ_MOUNT 0x0008 /* new filesystem arrived */ 508 #define VQ_UNMOUNT 0x0010 /* filesystem has left */ 509 #define VQ_DEAD 0x0020 /* filesystem is dead, needs force unmount */ 510 #define VQ_ASSIST 0x0040 /* filesystem needs assistance from external 511 program */ 512 #define VQ_NOTRESPLOCK 0x0080 /* server lockd down */ 513 #define VQ_FLAG0100 0x0100 /* placeholder */ 514 #define VQ_FLAG0200 0x0200 /* placeholder */ 515 #define VQ_FLAG0400 0x0400 /* placeholder */ 516 #define VQ_FLAG0800 0x0800 /* placeholder */ 517 #define VQ_FLAG1000 0x1000 /* placeholder */ 518 #define VQ_FLAG2000 0x2000 /* placeholder */ 519 #define VQ_FLAG4000 0x4000 /* placeholder */ 520 #define VQ_FLAG8000 0x8000 /* placeholder */ 521 522 #ifdef _KERNEL 523 524 #ifdef MALLOC_DECLARE 525 MALLOC_DECLARE(M_MOUNT); 526 #endif 527 extern int nfs_mount_type; /* vfc_typenum for nfs, or -1 */ 528 529 struct vfsconf *vfsconf_find_by_name(const char *); 530 struct vfsconf *vfsconf_find_by_typenum(int); 531 int vfsconf_get_maxtypenum(void); 532 int vfsconf_each(int (*)(struct vfsconf *, void *), void *); 533 534 #endif 535 536 #if defined(_KERNEL) || defined(_KERNEL_STRUCTURES) 537 538 TAILQ_HEAD(mntlist, mount); /* struct mntlist */ 539 540 /* 541 * Operations supported on mounted file system. 542 */ 543 struct nlookupdata; 544 struct nlookupdata; 545 struct mbuf; 546 547 typedef int vfs_mount_t(struct mount *mp, char *path, caddr_t data, 548 struct ucred *cred); 549 typedef int vfs_start_t(struct mount *mp, int flags); 550 typedef int vfs_unmount_t(struct mount *mp, int mntflags); 551 typedef int vfs_root_t(struct mount *mp, struct vnode **vpp); 552 typedef int vfs_quotactl_t(struct mount *mp, int cmds, uid_t uid, caddr_t arg, 553 struct ucred *cred); 554 typedef int vfs_statfs_t(struct mount *mp, struct statfs *sbp, 555 struct ucred *cred); 556 typedef int vfs_statvfs_t(struct mount *mp, struct statvfs *sbp, 557 struct ucred *cred); 558 typedef int vfs_sync_t(struct mount *mp, int waitfor); 559 typedef int vfs_vget_t(struct mount *mp, struct vnode *dvp, 560 ino_t ino, struct vnode **vpp); 561 typedef int vfs_fhtovp_t(struct mount *mp, struct vnode *rootvp, 562 struct fid *fhp, struct vnode **vpp); 563 typedef int vfs_checkexp_t(struct mount *mp, struct sockaddr *nam, 564 int *extflagsp, struct ucred **credanonp); 565 typedef int vfs_vptofh_t(struct vnode *vp, struct fid *fhp); 566 typedef int vfs_init_t(struct vfsconf *); 567 typedef int vfs_uninit_t(struct vfsconf *); 568 typedef int vfs_extattrctl_t(struct mount *mp, int cmd, struct vnode *vp, 569 int attrnamespace, const char *attrname, 570 struct ucred *cred); 571 typedef int vfs_acinit_t(struct mount *mp); 572 typedef void vfs_acdone_t(struct mount *mp); 573 typedef void vfs_account_t(struct mount *mp, 574 uid_t uid, gid_t gid, int64_t delta); 575 typedef void vfs_ncpgen_set_t(struct mount *mp, struct namecache *ncp); 576 typedef int vfs_ncpgen_test_t(struct mount *mp, struct namecache *ncp); 577 typedef int vfs_modifying_t(struct mount *mp); 578 579 int vfs_mount(struct mount *mp, char *path, caddr_t data, struct ucred *cred); 580 int vfs_start(struct mount *mp, int flags); 581 int vfs_unmount(struct mount *mp, int mntflags); 582 int vfs_root(struct mount *mp, struct vnode **vpp); 583 int vfs_quotactl(struct mount *mp, int cmds, uid_t uid, caddr_t arg, 584 struct ucred *cred); 585 int vfs_statfs(struct mount *mp, struct statfs *sbp, struct ucred *cred); 586 int vfs_statvfs(struct mount *mp, struct statvfs *sbp, struct ucred *cred); 587 int vfs_sync(struct mount *mp, int waitfor); 588 int vfs_vget(struct mount *mp, struct vnode *dvp, 589 ino_t ino, struct vnode **vpp); 590 int vfs_fhtovp(struct mount *mp, struct vnode *rootvp, 591 struct fid *fhp, struct vnode **vpp); 592 int vfs_checkexp(struct mount *mp, struct sockaddr *nam, 593 int *extflagsp, struct ucred **credanonp); 594 int vfs_vptofh(struct vnode *vp, struct fid *fhp); 595 int vfs_init(struct vfsconf *vfc); 596 int vfs_uninit(struct vfsconf *vfc, struct vfsconf *vfsp); 597 int vfs_extattrctl(struct mount *mp, int cmd, struct vnode *vp, 598 int attrnamespace, const char *attrname, 599 struct ucred *cred); 600 int vfs_modifying(struct mount *mp); 601 602 struct vfsops { 603 long vfs_flags; 604 vfs_mount_t *vfs_mount; 605 vfs_start_t *vfs_start; 606 vfs_unmount_t *vfs_unmount; 607 vfs_root_t *vfs_root; 608 vfs_quotactl_t *vfs_quotactl; 609 vfs_statfs_t *vfs_statfs; 610 vfs_sync_t *vfs_sync; 611 vfs_vget_t *vfs_vget; 612 vfs_fhtovp_t *vfs_fhtovp; 613 vfs_checkexp_t *vfs_checkexp; 614 vfs_vptofh_t *vfs_vptofh; 615 vfs_init_t *vfs_init; 616 vfs_uninit_t *vfs_uninit; 617 vfs_extattrctl_t *vfs_extattrctl; 618 vfs_statvfs_t *vfs_statvfs; 619 vfs_acinit_t *vfs_acinit; 620 vfs_acdone_t *vfs_acdone; 621 vfs_account_t *vfs_account; 622 vfs_ncpgen_set_t *vfs_ncpgen_set; 623 vfs_ncpgen_test_t *vfs_ncpgen_test; 624 vfs_modifying_t *vfs_modifying; 625 }; 626 627 #define VFSOPSF_NOSYNCERTHR 0x00000001 628 629 #define VFS_MOUNT(MP, PATH, DATA, CRED) \ 630 vfs_mount(MP, PATH, DATA, CRED) 631 #define VFS_START(MP, FLAGS) \ 632 vfs_start(MP, FLAGS) 633 #define VFS_UNMOUNT(MP, FORCE) \ 634 vfs_unmount(MP, FORCE) 635 #define VFS_ROOT(MP, VPP) \ 636 vfs_root(MP, VPP) 637 #define VFS_QUOTACTL(MP, C, U, A, CRED) \ 638 vfs_quotactl(MP, C, U, A, CRED) 639 #define VFS_STATFS(MP, SBP, CRED) \ 640 vfs_statfs(MP, SBP, CRED) 641 #define VFS_STATVFS(MP, SBP, CRED) \ 642 vfs_statvfs(MP, SBP, CRED) 643 #define VFS_SYNC(MP, WAIT) \ 644 vfs_sync(MP, WAIT) 645 #define VFS_VGET(MP, DVP, INO, VPP) \ 646 vfs_vget(MP, DVP, INO, VPP) 647 #define VFS_FHTOVP(MP, ROOTVP, FIDP, VPP) \ 648 vfs_fhtovp(MP, ROOTVP, FIDP, VPP) 649 #define VFS_VPTOFH(VP, FIDP) \ 650 vfs_vptofh(VP, FIDP) 651 #define VFS_CHECKEXP(MP, NAM, EXFLG, CRED) \ 652 vfs_checkexp(MP, NAM, EXFLG, CRED) 653 #define VFS_EXTATTRCTL(MP, C, FVP, NS, N, CRED) \ 654 vfs_extattrctl(MP, C, FVP, NS, N, CRED) 655 #define VFS_ACCOUNT(MP, U, G, D) \ 656 if ((MP->mnt_op->vfs_account != NULL) && (D != 0)) \ 657 MP->mnt_op->vfs_account(MP, U, G, D); 658 #define VFS_ACINIT(MP, ERROR) \ 659 if (vfs_quota_enabled && MP->mnt_op->vfs_acinit != NULL) \ 660 ERROR = MP->mnt_op->vfs_acinit(MP); 661 #define VFS_ACDONE(MP) \ 662 if (vfs_quota_enabled && MP->mnt_op->vfs_acdone != NULL) \ 663 MP->mnt_op->vfs_acdone(MP); 664 #define VFS_NCPGEN_SET(MP, NCP) \ 665 MP->mnt_op->vfs_ncpgen_set(MP, NCP) 666 #define VFS_NCPGEN_TEST(MP, NCP) \ 667 MP->mnt_op->vfs_ncpgen_test(MP, NCP) 668 #define VFS_MODIFYING(MP) \ 669 MP->mnt_op->vfs_modifying(MP) 670 671 #endif 672 673 #ifdef _KERNEL 674 675 #include <sys/module.h> 676 677 #define VFS_SET(vfsops, fsname, flags) \ 678 static struct vfsconf fsname ## _vfsconf = { \ 679 &vfsops, \ 680 #fsname, \ 681 -1, \ 682 0, \ 683 flags, \ 684 { NULL }, \ 685 }; \ 686 static moduledata_t fsname ## _mod = { \ 687 #fsname, \ 688 vfs_modevent, \ 689 & fsname ## _vfsconf \ 690 }; \ 691 DECLARE_MODULE(fsname, fsname ## _mod, SI_SUB_VFS, SI_ORDER_MIDDLE) 692 693 #endif 694 695 #if defined(_KERNEL) || defined(_KERNEL_STRUCTURES) 696 697 #include <net/radix.h> 698 699 #define AF_MAX 36 /* XXX */ 700 701 /* 702 * Network address lookup element 703 */ 704 struct netcred { 705 struct radix_node netc_rnodes[2]; 706 int netc_exflags; 707 struct ucred netc_anon; 708 }; 709 710 /* 711 * Network export information 712 */ 713 struct netexport { 714 struct netcred ne_defexported; /* Default export */ 715 struct radix_node_head *ne_inethead; /* IPv4 radix */ 716 struct radix_node_head *ne_inet6head; /* IPv6 radix */ 717 struct radix_node_head *ne_maskhead; /* Shared mask radix */ 718 }; 719 #define NE_LOCK(nep) lwkt_getpooltoken(nep) 720 #define NE_UNLOCK(nep) lwkt_relpooltoken(nep) 721 #define NE_ASSERT_LOCKED(nep) \ 722 ASSERT_LWKT_TOKEN_HELD(lwkt_token_pool_lookup(nep)) 723 724 #endif 725 726 #ifdef _KERNEL 727 /* 728 * exported vnode operations 729 */ 730 void mount_hold(struct mount *); 731 void mount_drop(struct mount *); 732 int dounmount (struct mount *, int, int); 733 int vfs_setpublicfs /* set publicly exported fs */ 734 (struct mount *, struct netexport *, const struct export_args *); 735 int vfs_lock (struct mount *); /* lock a vfs */ 736 void vfs_msync (struct mount *, int); 737 void vfs_unlock (struct mount *); /* unlock a vfs */ 738 int vfs_busy (struct mount *, int); 739 int vfs_export /* process mount export info */ 740 (struct mount *, struct netexport *, const struct export_args *); 741 struct netcred *vfs_export_lookup /* lookup host in fs export list */ 742 (struct mount *, struct netexport *, struct sockaddr *); 743 int vfs_allocate_syncvnode (struct mount *); 744 void vfs_getnewfsid (struct mount *); 745 void vfs_setfsid(struct mount *mp, fsid_t *template); 746 cdev_t vfs_getrootfsid (struct mount *); 747 struct mount *vfs_getvfs (fsid_t *); /* return vfs given fsid */ 748 int vfs_modevent (module_t, int, void *); 749 int vfs_mountedon (struct vnode *); /* is a vfs mounted on vp */ 750 int vfs_rootmountalloc (char *, char *, struct mount **); 751 void vfs_unbusy (struct mount *); 752 void vfs_unmountall (int halting); 753 int vfs_register (struct vfsconf *); 754 int vfs_unregister (struct vfsconf *); 755 extern struct nfs_public nfs_pub; 756 757 /* 758 * Declarations for these vfs default operations are located in 759 * kern/vfs_default.c, they should be used instead of making "dummy" 760 * functions or casting entries in the VFS op table to "enopnotsupp()". 761 */ 762 vfs_start_t vfs_stdstart; 763 vfs_root_t vfs_stdroot; 764 vfs_quotactl_t vfs_stdquotactl; 765 vfs_statfs_t vfs_stdstatfs; 766 vfs_statvfs_t vfs_stdstatvfs; 767 vfs_sync_t vfs_stdsync; 768 vfs_sync_t vfs_stdnosync; 769 vfs_vget_t vfs_stdvget; 770 vfs_fhtovp_t vfs_stdfhtovp; 771 vfs_checkexp_t vfs_stdcheckexp; 772 vfs_vptofh_t vfs_stdvptofh; 773 vfs_init_t vfs_stdinit; 774 vfs_uninit_t vfs_stduninit; 775 vfs_extattrctl_t vfs_stdextattrctl; 776 vfs_acinit_t vfs_stdac_init; 777 vfs_acdone_t vfs_stdac_done; 778 vfs_account_t vfs_stdaccount; 779 vfs_account_t vfs_noaccount; 780 vfs_ncpgen_set_t vfs_stdncpgen_set; 781 vfs_ncpgen_test_t vfs_stdncpgen_test; 782 vfs_modifying_t vfs_stdmodifying; 783 784 struct vop_access_args; 785 int vop_helper_access(struct vop_access_args *ap, uid_t ino_uid, gid_t ino_gid, 786 mode_t ino_mode, u_int32_t ino_flags); 787 int vop_helper_setattr_flags(u_int32_t *ino_flags, u_int32_t vaflags, 788 uid_t uid, struct ucred *cred); 789 uid_t vop_helper_create_uid(struct mount *mp, mode_t dmode, uid_t duid, 790 struct ucred *cred, mode_t *modep); 791 int vop_helper_chmod(struct vnode *vp, mode_t new_mode, struct ucred *cred, 792 uid_t cur_uid, gid_t cur_gid, mode_t *cur_modep); 793 int vop_helper_chown(struct vnode *vp, uid_t new_uid, gid_t new_gid, 794 struct ucred *cred, 795 uid_t *cur_uidp, gid_t *cur_gidp, mode_t *cur_modep); 796 int vop_helper_read_shortcut(struct vop_read_args *ap); 797 798 void add_bio_ops(struct bio_ops *ops); 799 void rem_bio_ops(struct bio_ops *ops); 800 801 int journal_mountctl(struct vop_mountctl_args *ap); 802 void journal_remove_all_journals(struct mount *mp, int flags); 803 804 void mountlist_insert(struct mount *, int); 805 int mountlist_interlock(int (*callback)(struct mount *), struct mount *); 806 struct mount *mountlist_boot_getfirst(void); 807 void mountlist_remove(struct mount *mp); 808 int mountlist_exists(struct mount *mp); 809 int mountlist_scan(int (*callback)(struct mount *, void *), void *, int); 810 struct mount *mount_get_by_nc(struct namecache *ncp); 811 #else /* !_KERNEL */ 812 813 #include <sys/cdefs.h> 814 815 __BEGIN_DECLS 816 int fstatfs (int, struct statfs *); 817 int getfh (const char *, fhandle_t *); 818 int getfsstat (struct statfs *, long, int); 819 int getmntinfo (struct statfs **, int); 820 int getmntvinfo (struct statfs **, struct statvfs **, int); 821 int mount (const char *, const char *, int, void *); 822 int statfs (const char *, struct statfs *); 823 int unmount (const char *, int); 824 int fhopen (const struct fhandle *, int); 825 int fhstat (const struct fhandle *, struct stat *); 826 int fhstatfs (const struct fhandle *, struct statfs *); 827 828 /* C library stuff */ 829 void endvfsent (void); 830 struct ovfsconf *getvfsbyname (const char *); 831 struct ovfsconf *getvfsbytype (int); 832 struct ovfsconf *getvfsent (void); 833 #define getvfsbyname new_getvfsbyname 834 int new_getvfsbyname (const char *, struct vfsconf *); 835 void setvfsent (int); 836 int vfsisloadable (const char *); 837 int vfsload (const char *); 838 __END_DECLS 839 840 #endif /* _KERNEL */ 841 842 #endif /* !_SYS_MOUNT_H_ */ 843 844