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/queue.h> 37 #include <sys/tree.h> 38 #include <sys/ucred.h> 39 40 #ifndef _KERNEL 41 #if !defined(_POSIX_C_SOURCE) && !defined(_XOPEN_SOURCE) 42 #include <sys/stat.h> 43 #endif /* !_POSIX_C_SOURCE */ 44 #endif /* !_KERNEL */ 45 46 #if defined(_KERNEL) || defined(_KERNEL_STRUCTURES) 47 #ifndef _SYS_LOCK_H_ 48 #include <sys/lock.h> 49 #endif 50 #ifndef _SYS_NAMECACHE_H_ 51 #include <sys/namecache.h> 52 #endif 53 #ifndef _SYS_STATVFS_H_ 54 #include <sys/statvfs.h> 55 #endif 56 #ifndef _SYS_THREAD_H_ 57 #include <sys/thread.h> 58 #endif 59 #include <sys/vfs_quota.h> 60 #endif 61 62 struct thread; 63 struct journal; 64 struct vop_ops; 65 struct vop_mountctl_args; 66 struct statvfs; 67 struct vmntvnodescan_info; 68 69 typedef struct fsid { int32_t val[2]; } fsid_t; /* file system id type */ 70 71 /* 72 * File identifier. These are unique per filesystem on a single machine. 73 * 74 * fix_ext is also used by HAMMER. 75 */ 76 #define MAXFIDSZ 16 77 78 struct fid { 79 u_short fid_len; /* length of data in bytes */ 80 u_short fid_ext; /* extended data */ 81 char fid_data[MAXFIDSZ]; /* data (variable length) */ 82 } __packed; 83 84 /* 85 * file system statistics 86 */ 87 88 #define MFSNAMELEN 16 /* length of fs type name, including null */ 89 #define MNAMELEN 80 /* length of buffer for returned name */ 90 91 struct statfs { 92 long f_spare2; /* placeholder */ 93 long f_bsize; /* fundamental file system block size */ 94 long f_iosize; /* optimal transfer block size */ 95 long f_blocks; /* total data blocks in file system */ 96 long f_bfree; /* free blocks in fs */ 97 long f_bavail; /* free blocks avail to non-superuser */ 98 long f_files; /* total file nodes in file system */ 99 long f_ffree; /* free file nodes in fs */ 100 fsid_t f_fsid; /* file system id */ 101 uid_t f_owner; /* user that mounted the filesystem */ 102 int f_type; /* type of filesystem */ 103 int f_flags; /* copy of mount exported flags */ 104 long f_syncwrites; /* count of sync writes since mount */ 105 long f_asyncwrites; /* count of async writes since mount */ 106 char f_fstypename[MFSNAMELEN]; /* fs type name */ 107 char f_mntonname[MNAMELEN]; /* directory on which mounted */ 108 long f_syncreads; /* count of sync reads since mount */ 109 long f_asyncreads; /* count of async reads since mount */ 110 short f_spares1; /* unused spare */ 111 char f_mntfromname[MNAMELEN];/* mounted filesystem */ 112 short f_spares2; /* unused spare */ 113 long f_spare[2]; /* unused spare */ 114 }; 115 116 #if defined(_KERNEL) || defined(_KERNEL_STRUCTURES) 117 118 /* 119 * bio_ops are associated with the mount structure and used in conjuction 120 * with the b_dep field in a buffer. Currently softupdates and HAMMER 121 * utilize this field. 122 * 123 * All bio_ops callbacks must be MPSAFE and could be called without 124 * the mplock. 125 */ 126 struct buf; 127 128 struct bio_ops { 129 TAILQ_ENTRY(bio_ops) entry; 130 void (*io_start) (struct buf *); 131 void (*io_complete) (struct buf *); 132 void (*io_deallocate) (struct buf *); 133 int (*io_fsync) (struct vnode *); 134 int (*io_sync) (struct mount *); 135 void (*io_movedeps) (struct buf *, struct buf *); 136 int (*io_countdeps) (struct buf *, int); 137 int (*io_checkread) (struct buf *); 138 int (*io_checkwrite) (struct buf *); 139 }; 140 141 #endif 142 143 /* 144 * vfs quota accounting 145 * 146 * uids and gids often come in contiguous blocks; use a small linear 147 * array as the basic in-memory accounting allocation unit 148 */ 149 #define ACCT_CHUNK_BITS 5 150 #define ACCT_CHUNK_NIDS (1<<ACCT_CHUNK_BITS) 151 #define ACCT_CHUNK_MASK (ACCT_CHUNK_NIDS - 1) 152 153 struct ac_counters { 154 uint64_t space; 155 uint64_t limit; 156 }; 157 158 struct ac_unode { 159 RB_ENTRY(ac_unode) rb_entry; 160 uid_t left_bits; 161 struct ac_counters uid_chunk[ACCT_CHUNK_NIDS]; 162 }; 163 164 struct ac_gnode { 165 RB_ENTRY(ac_gnode) rb_entry; 166 gid_t left_bits; 167 struct ac_counters gid_chunk[ACCT_CHUNK_NIDS]; 168 }; 169 170 #if defined(_KERNEL) || defined(_KERNEL_STRUCTURES) 171 172 struct vfs_acct { 173 RB_HEAD(ac_utree,ac_unode) ac_uroot; 174 RB_HEAD(ac_gtree,ac_gnode) ac_groot; 175 uint64_t ac_bytes; /* total bytes used */ 176 uint64_t ac_limit; 177 struct spinlock ac_spin; /* protective spinlock */ 178 }; 179 180 181 /* 182 * Structure per mounted file system. Each mounted file system has an 183 * array of operations and an instance record. The file systems are 184 * put on a doubly linked list. 185 * 186 * NOTE: mnt_nvnodelist and mnt_reservedvnlist. At the moment vnodes 187 * are linked into mnt_nvnodelist. At some point in the near future the 188 * vnode list will be split into a 'dirty' and 'clean' list. mnt_nvnodelist 189 * will become the dirty list and mnt_reservedvnlist will become the 'clean' 190 * list. Filesystem kld's syncing code should remain compatible since 191 * they only need to scan the dirty vnode list (nvnodelist -> dirtyvnodelist). 192 * 193 * NOTE: All VFSs must at least populate mnt_vn_ops or those VOP ops that 194 * only take namecache pointers will not be able to find their operations 195 * vector via namecache->nc_mount. 196 * 197 * MPSAFE NOTES: mnt_lock interlocks mounting and unmounting operations. 198 * 199 * mnt_token interlocks operations which adjust the mount 200 * structure and will also be held through VFS operations 201 * for VFSes not flagged MPSAFE. 202 * 203 * The VFS should pre-set VFCF_MPSAFE in the VFS_SET() to 204 * avoid use of the mplock during mounting. This will also 205 * cause MNTK_ALL_MPSAFE to be set in mnt_kern_flags. If the 206 * VFS does not set VFCF_MPSAFE then it can set individual 207 * MNTK_*_MPSAFE flags in mnt_kern_flags. 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 u_int mnt_namecache_gen; /* ++ to clear negative hits */ 217 u_int mnt_pbuf_count; /* pbuf usage limit */ 218 struct vnode *mnt_syncer; /* syncer vnode */ 219 struct syncer_ctx *mnt_syncer_ctx; /* syncer process context */ 220 struct vnodelst mnt_nvnodelist; /* list of vnodes this mount */ 221 TAILQ_HEAD(,vmntvnodescan_info) mnt_vnodescan_list; 222 struct lock mnt_lock; /* mount structure lock */ 223 int mnt_flag; /* flags shared with user */ 224 int mnt_kern_flag; /* kernel only flags */ 225 int mnt_maxsymlinklen; /* max size of short symlink */ 226 struct statfs mnt_stat; /* cache of filesystem stats */ 227 struct statvfs mnt_vstat; /* extended stats */ 228 qaddr_t mnt_data; /* private data */ 229 time_t mnt_time; /* last time written*/ 230 u_int mnt_iosize_max; /* max IO request size */ 231 struct vnodelst mnt_reservedvnlist; /* (future) dirty vnode list */ 232 int mnt_nvnodelistsize; /* # of vnodes on this mount */ 233 234 /* 235 * ops vectors have a fixed stacking order. All primary calls run 236 * through mnt_vn_ops. This field is typically assigned to 237 * mnt_vn_norm_ops. If journaling has been enabled this field is 238 * usually assigned to mnt_vn_journal_ops. 239 */ 240 struct vop_ops *mnt_vn_use_ops; /* current ops set */ 241 242 struct vop_ops *mnt_vn_coherency_ops; /* cache coherency ops */ 243 struct vop_ops *mnt_vn_journal_ops; /* journaling ops */ 244 struct vop_ops *mnt_vn_norm_ops; /* for use by the VFS */ 245 struct vop_ops *mnt_vn_spec_ops; /* for use by the VFS */ 246 struct vop_ops *mnt_vn_fifo_ops; /* for use by the VFS */ 247 struct nchandle mnt_ncmountpt; /* mount point */ 248 struct nchandle mnt_ncmounton; /* mounted on */ 249 char mnt_pad[24]; /* (try to cache-align refs) */ 250 int mnt_refs; /* nchandle references */ 251 int mnt_hold; /* prevent kfree */ 252 struct lwkt_token mnt_token; /* token lock if not MPSAFE */ 253 struct journallst mnt_jlist; /* list of active journals */ 254 u_int8_t *mnt_jbitmap; /* streamid bitmap */ 255 int16_t mnt_streamid; /* last streamid */ 256 257 struct bio_ops *mnt_bioops; /* BIO ops (hammer, softupd) */ 258 259 struct vfs_acct mnt_acct; /* vfs space accounting */ 260 RB_ENTRY(mount) mnt_node; /* mnt_stat.f_fsid */ 261 }; 262 263 #endif /* _KERNEL || _KERNEL_STRUCTURES */ 264 265 /* 266 * User specifiable flags. 267 */ 268 #define MNT_RDONLY 0x00000001 /* read only filesystem */ 269 #define MNT_SYNCHRONOUS 0x00000002 /* file system written synchronously */ 270 #define MNT_NOEXEC 0x00000004 /* can't exec from filesystem */ 271 #define MNT_NOSUID 0x00000008 /* don't honor setuid bits on fs */ 272 #define MNT_NODEV 0x00000010 /* don't interpret special files */ 273 #define MNT_AUTOMOUNTED 0x00000020 /* mounted by automountd(8) */ 274 #define MNT_ASYNC 0x00000040 /* file system written asynchronously */ 275 #define MNT_SUIDDIR 0x00100000 /* special handling of SUID on dirs */ 276 #define MNT_SOFTDEP 0x00200000 /* soft updates being done */ 277 #define MNT_NOSYMFOLLOW 0x00400000 /* do not follow symlinks */ 278 #define MNT_TRIM 0x01000000 /* Enable online FS trimming */ 279 #define MNT_NOATIME 0x10000000 /* disable update of file access time */ 280 #define MNT_NOCLUSTERR 0x40000000 /* disable cluster read */ 281 #define MNT_NOCLUSTERW 0x80000000 /* disable cluster write */ 282 283 /* 284 * NFS export related mount flags. 285 */ 286 #define MNT_EXRDONLY 0x00000080 /* exported read only */ 287 #define MNT_EXPORTED 0x00000100 /* file system is exported */ 288 #define MNT_DEFEXPORTED 0x00000200 /* exported to the world */ 289 #define MNT_EXPORTANON 0x00000400 /* use anon uid mapping for everyone */ 290 #define MNT_EXKERB 0x00000800 /* exported with Kerberos uid mapping */ 291 #define MNT_EXPUBLIC 0x20000000 /* public export (WebNFS) */ 292 293 /* 294 * Flags set by internal operations, 295 * but visible to the user. 296 * XXX some of these are not quite right.. (I've never seen the root flag set) 297 */ 298 #define MNT_LOCAL 0x00001000 /* filesystem is stored locally */ 299 #define MNT_QUOTA 0x00002000 /* quotas are enabled on filesystem */ 300 #define MNT_ROOTFS 0x00004000 /* identifies the root filesystem */ 301 #define MNT_USER 0x00008000 /* mounted by a user */ 302 #define MNT_IGNORE 0x00800000 /* do not show entry in df */ 303 304 /* 305 * Mask of flags that are visible to statfs() 306 * XXX I think that this could now become (~(MNT_CMDFLAGS)) 307 * but the 'mount' program may need changing to handle this. 308 */ 309 #define MNT_VISFLAGMASK (MNT_RDONLY | MNT_SYNCHRONOUS | MNT_NOEXEC | \ 310 MNT_NOSUID | MNT_NODEV | \ 311 MNT_ASYNC | MNT_EXRDONLY | MNT_EXPORTED | \ 312 MNT_DEFEXPORTED | MNT_EXPORTANON| MNT_EXKERB | \ 313 MNT_LOCAL | MNT_USER | MNT_QUOTA | \ 314 MNT_ROOTFS | MNT_NOATIME | MNT_NOCLUSTERR| \ 315 MNT_NOCLUSTERW | MNT_SUIDDIR | MNT_SOFTDEP | \ 316 MNT_IGNORE | MNT_NOSYMFOLLOW | MNT_EXPUBLIC| \ 317 MNT_TRIM | MNT_AUTOMOUNTED) 318 /* 319 * External filesystem command modifier flags. 320 * Unmount can use the MNT_FORCE flag. 321 * XXX These are not STATES and really should be somewhere else. 322 */ 323 #define MNT_UPDATE 0x00010000 /* not a real mount, just an update */ 324 #define MNT_DELEXPORT 0x00020000 /* delete export host lists */ 325 #define MNT_RELOAD 0x00040000 /* reload filesystem data */ 326 #define MNT_FORCE 0x00080000 /* force unmount or readonly change */ 327 #define MNT_CMDFLAGS (MNT_UPDATE|MNT_DELEXPORT|MNT_RELOAD|MNT_FORCE) 328 /* 329 * Internal filesystem control flags stored in mnt_kern_flag. 330 * 331 * MNTK_UNMOUNT locks the mount entry so that name lookup cannot proceed 332 * past the mount point. This keeps the subtree stable during mounts 333 * and unmounts. 334 * 335 * MNTK_UNMOUNTF permits filesystems to detect a forced unmount while 336 * dounmount() is still waiting to lock the mountpoint. This allows 337 * the filesystem to cancel operations that might otherwise deadlock 338 * with the unmount attempt (used by NFS). 339 * 340 * MNTK_NOSTKMNT prevents mounting another filesystem inside the flagged one. 341 */ 342 #define MNTK_UNMOUNTF 0x00000001 /* forced unmount in progress */ 343 #define MNTK_QUICKHALT 0x00008000 /* quick unmount on halt */ 344 #define MNTK_MPSAFE 0x00010000 /* call vops without mnt_token lock */ 345 #define MNTK_RD_MPSAFE 0x00020000 /* vop_read is MPSAFE */ 346 #define MNTK_WR_MPSAFE 0x00040000 /* vop_write is MPSAFE */ 347 #define MNTK_GA_MPSAFE 0x00080000 /* vop_getattr is MPSAFE */ 348 #define MNTK_IN_MPSAFE 0x00100000 /* vop_inactive is MPSAFE */ 349 #define MNTK_SG_MPSAFE 0x00200000 /* vop_strategy is MPSAFE */ 350 #define MNTK_NCALIASED 0x00800000 /* namecached aliased */ 351 #define MNTK_UNMOUNT 0x01000000 /* unmount in progress */ 352 #define MNTK_MWAIT 0x02000000 /* waiting for unmount to finish */ 353 #define MNTK_WANTRDWR 0x04000000 /* upgrade to read/write requested */ 354 #define MNTK_FSMID 0x08000000 /* getattr supports FSMIDs */ 355 #define MNTK_NOSTKMNT 0x10000000 /* no stacked mount point allowed */ 356 #define MNTK_NOMSYNC 0x20000000 /* used by tmpfs */ 357 #define MNTK_THR_SYNC 0x40000000 /* fs sync thread requested */ 358 #define MNTK_ST_MPSAFE 0x80000000 /* (mfs) vfs_start is MPSAFE */ 359 360 #define MNTK_ALL_MPSAFE (MNTK_MPSAFE | MNTK_RD_MPSAFE | MNTK_WR_MPSAFE | \ 361 MNTK_GA_MPSAFE | MNTK_IN_MPSAFE | MNTK_SG_MPSAFE | \ 362 MNTK_ST_MPSAFE) 363 364 /* 365 * mountlist_*() defines 366 */ 367 #define MNTSCAN_FORWARD 0x0001 368 #define MNTSCAN_REVERSE 0x0002 369 #define MNTSCAN_NOBUSY 0x0004 370 371 #define MNTINS_FIRST 0x0001 372 #define MNTINS_LAST 0x0002 373 374 /* 375 * Sysctl CTL_VFS definitions. 376 * 377 * Second level identifier specifies which filesystem. Second level 378 * identifier VFS_VFSCONF returns information about all filesystems. 379 * Second level identifier VFS_GENERIC is non-terminal. 380 */ 381 #define VFS_VFSCONF 0 /* get configured filesystems */ 382 #define VFS_GENERIC 0 /* generic filesystem information */ 383 /* 384 * Third level identifiers for VFS_GENERIC are given below; third 385 * level identifiers for specific filesystems are given in their 386 * mount specific header files. 387 */ 388 #define VFS_MAXTYPENUM 1 /* int: highest defined filesystem type */ 389 #define VFS_CONF 2 /* struct: vfsconf for filesystem given 390 as next argument */ 391 392 /* 393 * VFS MPLOCK helper. 394 * 395 * We have to cache the supplied mp because in certain situations 396 * the related vnode might go away across the use case (vop_strategy()). 397 */ 398 #define VFS_MPLOCK_DECLARE struct mount *xlock_mp 399 400 #define VFS_MPLOCK(mp) VFS_MPLOCK_FLAG(mp, MNTK_MPSAFE) 401 402 #define VFS_MPLOCK_FLAG(mp, flag) \ 403 do { \ 404 if (mp->mnt_kern_flag & flag) { \ 405 xlock_mp = NULL; \ 406 } else { \ 407 xlock_mp = (mp); \ 408 get_mplock(); /* TEMPORARY */ \ 409 lwkt_gettoken(&xlock_mp->mnt_token); \ 410 } \ 411 } while(0) 412 413 #define VFS_MPUNLOCK() \ 414 do { \ 415 if (xlock_mp) { \ 416 lwkt_reltoken(&xlock_mp->mnt_token); \ 417 rel_mplock(); /* TEMPORARY */ \ 418 } \ 419 } while(0) 420 421 /* 422 * Flags for various system call interfaces. 423 * 424 * waitfor flags to vfs_sync() and getfsstat() 425 */ 426 #define MNT_WAIT 0x0001 /* synchronously wait for I/O to complete */ 427 #define MNT_NOWAIT 0x0002 /* start all I/O, but do not wait for it */ 428 #define MNT_LAZY 0x0004 /* be lazy and do not necessarily push it all */ 429 430 #define VOP_FSYNC_SYSCALL 0x0001 /* from system call */ 431 432 /* 433 * Generic file handle 434 */ 435 struct fhandle { 436 fsid_t fh_fsid; /* File system id of mount point */ 437 struct fid fh_fid; /* File sys specific id */ 438 }; 439 typedef struct fhandle fhandle_t; 440 441 /* 442 * Export arguments for local filesystem mount calls. 443 */ 444 struct export_args { 445 int ex_flags; /* export related flags */ 446 uid_t ex_root; /* mapping for root uid */ 447 struct ucred ex_anon; /* mapping for anonymous user */ 448 struct sockaddr *ex_addr; /* net address to which exported */ 449 int ex_addrlen; /* and the net address length */ 450 struct sockaddr *ex_mask; /* mask of valid bits in saddr */ 451 int ex_masklen; /* and the smask length */ 452 char *ex_indexfile; /* index file for WebNFS URLs */ 453 }; 454 455 /* 456 * Structure holding information for a publicly exported filesystem 457 * (WebNFS). Currently the specs allow just for one such filesystem. 458 */ 459 struct nfs_public { 460 int np_valid; /* Do we hold valid information */ 461 fhandle_t np_handle; /* Filehandle for pub fs (internal) */ 462 struct mount *np_mount; /* Mountpoint of exported fs */ 463 char *np_index; /* Index file */ 464 }; 465 466 /* 467 * Filesystem configuration information. One of these exists for each 468 * type of filesystem supported by the kernel. These are searched at 469 * mount time to identify the requested filesystem. 470 */ 471 struct vfsconf { 472 struct vfsops *vfc_vfsops; /* filesystem operations vector */ 473 char vfc_name[MFSNAMELEN]; /* filesystem type name */ 474 int vfc_typenum; /* historic filesystem type number */ 475 int vfc_refcount; /* number mounted of this type */ 476 int vfc_flags; /* permanent flags */ 477 STAILQ_ENTRY(vfsconf) vfc_next; /* next in list */ 478 }; 479 480 struct ovfsconf { 481 void *vfc_vfsops; 482 char vfc_name[32]; 483 int vfc_index; 484 int vfc_refcount; 485 int vfc_flags; 486 }; 487 488 /* 489 * NB: these flags refer to IMPLEMENTATION properties, not properties of 490 * any actual mounts; i.e., it does not make sense to change the flags. 491 */ 492 #define VFCF_STATIC 0x00010000 /* statically compiled into kernel */ 493 #define VFCF_NETWORK 0x00020000 /* may get data over the network */ 494 #define VFCF_READONLY 0x00040000 /* writes are not implemented */ 495 #define VFCF_SYNTHETIC 0x00080000 /* data does not represent real files */ 496 #define VFCF_LOOPBACK 0x00100000 /* aliases some other mounted FS */ 497 #define VFCF_UNICODE 0x00200000 /* stores file names as Unicode*/ 498 #define VFCF_MPSAFE 0x00400000 /* VFS is fully MPSAFE */ 499 500 /* vfsquery flags */ 501 #define VQ_NOTRESP 0x0001 /* server down */ 502 #define VQ_NEEDAUTH 0x0002 /* server bad auth */ 503 #define VQ_LOWDISK 0x0004 /* we're low on space */ 504 #define VQ_MOUNT 0x0008 /* new filesystem arrived */ 505 #define VQ_UNMOUNT 0x0010 /* filesystem has left */ 506 #define VQ_DEAD 0x0020 /* filesystem is dead, needs force unmount */ 507 #define VQ_ASSIST 0x0040 /* filesystem needs assistance from external 508 program */ 509 #define VQ_NOTRESPLOCK 0x0080 /* server lockd down */ 510 #define VQ_FLAG0100 0x0100 /* placeholder */ 511 #define VQ_FLAG0200 0x0200 /* placeholder */ 512 #define VQ_FLAG0400 0x0400 /* placeholder */ 513 #define VQ_FLAG0800 0x0800 /* placeholder */ 514 #define VQ_FLAG1000 0x1000 /* placeholder */ 515 #define VQ_FLAG2000 0x2000 /* placeholder */ 516 #define VQ_FLAG4000 0x4000 /* placeholder */ 517 #define VQ_FLAG8000 0x8000 /* placeholder */ 518 519 #ifdef _KERNEL 520 521 #ifdef MALLOC_DECLARE 522 MALLOC_DECLARE(M_MOUNT); 523 #endif 524 extern int nfs_mount_type; /* vfc_typenum for nfs, or -1 */ 525 526 struct vfsconf *vfsconf_find_by_name(const char *); 527 struct vfsconf *vfsconf_find_by_typenum(int); 528 int vfsconf_get_maxtypenum(void); 529 int vfsconf_each(int (*)(struct vfsconf *, void *), void *); 530 531 #endif 532 533 #if defined(_KERNEL) || defined(_KERNEL_STRUCTURES) 534 535 TAILQ_HEAD(mntlist, mount); /* struct mntlist */ 536 537 /* 538 * Operations supported on mounted file system. 539 */ 540 struct nlookupdata; 541 struct nlookupdata; 542 struct mbuf; 543 544 typedef int vfs_mount_t(struct mount *mp, char *path, caddr_t data, 545 struct ucred *cred); 546 typedef int vfs_start_t(struct mount *mp, int flags); 547 typedef int vfs_unmount_t(struct mount *mp, int mntflags); 548 typedef int vfs_root_t(struct mount *mp, struct vnode **vpp); 549 typedef int vfs_quotactl_t(struct mount *mp, int cmds, uid_t uid, caddr_t arg, 550 struct ucred *cred); 551 typedef int vfs_statfs_t(struct mount *mp, struct statfs *sbp, 552 struct ucred *cred); 553 typedef int vfs_statvfs_t(struct mount *mp, struct statvfs *sbp, 554 struct ucred *cred); 555 typedef int vfs_sync_t(struct mount *mp, int waitfor); 556 typedef int vfs_vget_t(struct mount *mp, struct vnode *dvp, 557 ino_t ino, struct vnode **vpp); 558 typedef int vfs_fhtovp_t(struct mount *mp, struct vnode *rootvp, 559 struct fid *fhp, struct vnode **vpp); 560 typedef int vfs_checkexp_t(struct mount *mp, struct sockaddr *nam, 561 int *extflagsp, struct ucred **credanonp); 562 typedef int vfs_vptofh_t(struct vnode *vp, struct fid *fhp); 563 typedef int vfs_init_t(struct vfsconf *); 564 typedef int vfs_uninit_t(struct vfsconf *); 565 typedef int vfs_extattrctl_t(struct mount *mp, int cmd, struct vnode *vp, 566 int attrnamespace, const char *attrname, 567 struct ucred *cred); 568 typedef int vfs_acinit_t(struct mount *mp); 569 typedef void vfs_acdone_t(struct mount *mp); 570 typedef void vfs_account_t(struct mount *mp, 571 uid_t uid, gid_t gid, int64_t delta); 572 typedef void vfs_ncpgen_set_t(struct mount *mp, struct namecache *ncp); 573 typedef int vfs_ncpgen_test_t(struct mount *mp, struct namecache *ncp); 574 typedef void vfs_modifying_t(struct mount *mp); 575 576 int vfs_mount(struct mount *mp, char *path, caddr_t data, struct ucred *cred); 577 int vfs_start(struct mount *mp, int flags); 578 int vfs_unmount(struct mount *mp, int mntflags); 579 int vfs_root(struct mount *mp, struct vnode **vpp); 580 int vfs_quotactl(struct mount *mp, int cmds, uid_t uid, caddr_t arg, 581 struct ucred *cred); 582 int vfs_statfs(struct mount *mp, struct statfs *sbp, struct ucred *cred); 583 int vfs_statvfs(struct mount *mp, struct statvfs *sbp, struct ucred *cred); 584 int vfs_sync(struct mount *mp, int waitfor); 585 int vfs_vget(struct mount *mp, struct vnode *dvp, 586 ino_t ino, struct vnode **vpp); 587 int vfs_fhtovp(struct mount *mp, struct vnode *rootvp, 588 struct fid *fhp, struct vnode **vpp); 589 int vfs_checkexp(struct mount *mp, struct sockaddr *nam, 590 int *extflagsp, struct ucred **credanonp); 591 int vfs_vptofh(struct vnode *vp, struct fid *fhp); 592 int vfs_init(struct vfsconf *vfc); 593 int vfs_uninit(struct vfsconf *vfc, struct vfsconf *vfsp); 594 int vfs_extattrctl(struct mount *mp, int cmd, struct vnode *vp, 595 int attrnamespace, const char *attrname, 596 struct ucred *cred); 597 int vfs_modifying(struct mount *mp); 598 599 struct vfsops { 600 vfs_mount_t *vfs_mount; 601 vfs_start_t *vfs_start; 602 vfs_unmount_t *vfs_unmount; 603 vfs_root_t *vfs_root; 604 vfs_quotactl_t *vfs_quotactl; 605 vfs_statfs_t *vfs_statfs; 606 vfs_sync_t *vfs_sync; 607 vfs_vget_t *vfs_vget; 608 vfs_fhtovp_t *vfs_fhtovp; 609 vfs_checkexp_t *vfs_checkexp; 610 vfs_vptofh_t *vfs_vptofh; 611 vfs_init_t *vfs_init; 612 vfs_uninit_t *vfs_uninit; 613 vfs_extattrctl_t *vfs_extattrctl; 614 vfs_statvfs_t *vfs_statvfs; 615 vfs_acinit_t *vfs_acinit; 616 vfs_acdone_t *vfs_acdone; 617 vfs_account_t *vfs_account; 618 vfs_ncpgen_set_t *vfs_ncpgen_set; 619 vfs_ncpgen_test_t *vfs_ncpgen_test; 620 vfs_modifying_t *vfs_modifying; 621 }; 622 623 #define VFS_MOUNT(MP, PATH, DATA, CRED) \ 624 vfs_mount(MP, PATH, DATA, CRED) 625 #define VFS_START(MP, FLAGS) \ 626 vfs_start(MP, FLAGS) 627 #define VFS_UNMOUNT(MP, FORCE) \ 628 vfs_unmount(MP, FORCE) 629 #define VFS_ROOT(MP, VPP) \ 630 vfs_root(MP, VPP) 631 #define VFS_QUOTACTL(MP, C, U, A, CRED) \ 632 vfs_quotactl(MP, C, U, A, CRED) 633 #define VFS_STATFS(MP, SBP, CRED) \ 634 vfs_statfs(MP, SBP, CRED) 635 #define VFS_STATVFS(MP, SBP, CRED) \ 636 vfs_statvfs(MP, SBP, CRED) 637 #define VFS_SYNC(MP, WAIT) \ 638 vfs_sync(MP, WAIT) 639 #define VFS_VGET(MP, DVP, INO, VPP) \ 640 vfs_vget(MP, DVP, INO, VPP) 641 #define VFS_FHTOVP(MP, ROOTVP, FIDP, VPP) \ 642 vfs_fhtovp(MP, ROOTVP, FIDP, VPP) 643 #define VFS_VPTOFH(VP, FIDP) \ 644 vfs_vptofh(VP, FIDP) 645 #define VFS_CHECKEXP(MP, NAM, EXFLG, CRED) \ 646 vfs_checkexp(MP, NAM, EXFLG, CRED) 647 #define VFS_EXTATTRCTL(MP, C, FVP, NS, N, CRED) \ 648 vfs_extattrctl(MP, C, FVP, NS, N, CRED) 649 #define VFS_ACCOUNT(MP, U, G, D) \ 650 if ((MP->mnt_op->vfs_account != NULL) && (D != 0)) \ 651 MP->mnt_op->vfs_account(MP, U, G, D); 652 #define VFS_ACINIT(MP, ERROR) \ 653 if (vfs_quota_enabled && MP->mnt_op->vfs_acinit != NULL) \ 654 ERROR = MP->mnt_op->vfs_acinit(MP); 655 #define VFS_ACDONE(MP) \ 656 if (vfs_quota_enabled && MP->mnt_op->vfs_acdone != NULL) \ 657 MP->mnt_op->vfs_acdone(MP); 658 #define VFS_NCPGEN_SET(MP, NCP) \ 659 MP->mnt_op->vfs_ncpgen_set(MP, NCP) 660 #define VFS_NCPGEN_TEST(MP, NCP) \ 661 MP->mnt_op->vfs_ncpgen_test(MP, NCP) 662 #define VFS_MODIFYING(MP) \ 663 MP->mnt_op->vfs_modifying(MP) 664 665 #endif 666 667 #ifdef _KERNEL 668 669 #include <sys/module.h> 670 671 #define VFS_SET(vfsops, fsname, flags) \ 672 static struct vfsconf fsname ## _vfsconf = { \ 673 &vfsops, \ 674 #fsname, \ 675 -1, \ 676 0, \ 677 flags, \ 678 { NULL }, \ 679 }; \ 680 static moduledata_t fsname ## _mod = { \ 681 #fsname, \ 682 vfs_modevent, \ 683 & fsname ## _vfsconf \ 684 }; \ 685 DECLARE_MODULE(fsname, fsname ## _mod, SI_SUB_VFS, SI_ORDER_MIDDLE) 686 687 #endif 688 689 #if defined(_KERNEL) || defined(_KERNEL_STRUCTURES) 690 691 #include <net/radix.h> 692 693 #define AF_MAX 36 /* XXX */ 694 695 /* 696 * Network address lookup element 697 */ 698 struct netcred { 699 struct radix_node netc_rnodes[2]; 700 int netc_exflags; 701 struct ucred netc_anon; 702 }; 703 704 /* 705 * Network export information 706 */ 707 struct netexport { 708 struct netcred ne_defexported; /* Default export */ 709 struct radix_node_head *ne_inethead; /* IPv4 radix */ 710 struct radix_node_head *ne_inet6head; /* IPv6 radix */ 711 struct radix_node_head *ne_maskhead; /* Shared mask radix */ 712 }; 713 #define NE_LOCK(nep) lwkt_getpooltoken(nep) 714 #define NE_UNLOCK(nep) lwkt_relpooltoken(nep) 715 #define NE_ASSERT_LOCKED(nep) \ 716 ASSERT_LWKT_TOKEN_HELD(lwkt_token_pool_lookup(nep)) 717 718 #endif 719 720 #ifdef _KERNEL 721 /* 722 * exported vnode operations 723 */ 724 void mount_hold(struct mount *); 725 void mount_drop(struct mount *); 726 int dounmount (struct mount *, int, int); 727 int vfs_setpublicfs /* set publicly exported fs */ 728 (struct mount *, struct netexport *, const struct export_args *); 729 int vfs_lock (struct mount *); /* lock a vfs */ 730 void vfs_msync (struct mount *, int); 731 void vfs_unlock (struct mount *); /* unlock a vfs */ 732 int vfs_busy (struct mount *, int); 733 int vfs_export /* process mount export info */ 734 (struct mount *, struct netexport *, const struct export_args *); 735 struct netcred *vfs_export_lookup /* lookup host in fs export list */ 736 (struct mount *, struct netexport *, struct sockaddr *); 737 int vfs_allocate_syncvnode (struct mount *); 738 void vfs_getnewfsid (struct mount *); 739 void vfs_setfsid(struct mount *mp, fsid_t *template); 740 cdev_t vfs_getrootfsid (struct mount *); 741 struct mount *vfs_getvfs (fsid_t *); /* return vfs given fsid */ 742 int vfs_modevent (module_t, int, void *); 743 int vfs_mountedon (struct vnode *); /* is a vfs mounted on vp */ 744 int vfs_rootmountalloc (char *, char *, struct mount **); 745 void vfs_unbusy (struct mount *); 746 void vfs_unmountall (int halting); 747 int vfs_register (struct vfsconf *); 748 int vfs_unregister (struct vfsconf *); 749 extern struct nfs_public nfs_pub; 750 751 /* 752 * Declarations for these vfs default operations are located in 753 * kern/vfs_default.c, they should be used instead of making "dummy" 754 * functions or casting entries in the VFS op table to "enopnotsupp()". 755 */ 756 vfs_start_t vfs_stdstart; 757 vfs_root_t vfs_stdroot; 758 vfs_quotactl_t vfs_stdquotactl; 759 vfs_statfs_t vfs_stdstatfs; 760 vfs_statvfs_t vfs_stdstatvfs; 761 vfs_sync_t vfs_stdsync; 762 vfs_sync_t vfs_stdnosync; 763 vfs_vget_t vfs_stdvget; 764 vfs_fhtovp_t vfs_stdfhtovp; 765 vfs_checkexp_t vfs_stdcheckexp; 766 vfs_vptofh_t vfs_stdvptofh; 767 vfs_init_t vfs_stdinit; 768 vfs_uninit_t vfs_stduninit; 769 vfs_extattrctl_t vfs_stdextattrctl; 770 vfs_acinit_t vfs_stdac_init; 771 vfs_acdone_t vfs_stdac_done; 772 vfs_account_t vfs_stdaccount; 773 vfs_account_t vfs_noaccount; 774 vfs_ncpgen_set_t vfs_stdncpgen_set; 775 vfs_ncpgen_test_t vfs_stdncpgen_test; 776 vfs_modifying_t vfs_stdmodifying; 777 778 struct vop_access_args; 779 int vop_helper_access(struct vop_access_args *ap, uid_t ino_uid, gid_t ino_gid, 780 mode_t ino_mode, u_int32_t ino_flags); 781 int vop_helper_setattr_flags(u_int32_t *ino_flags, u_int32_t vaflags, 782 uid_t uid, struct ucred *cred); 783 uid_t vop_helper_create_uid(struct mount *mp, mode_t dmode, uid_t duid, 784 struct ucred *cred, mode_t *modep); 785 int vop_helper_chmod(struct vnode *vp, mode_t new_mode, struct ucred *cred, 786 uid_t cur_uid, gid_t cur_gid, mode_t *cur_modep); 787 int vop_helper_chown(struct vnode *vp, uid_t new_uid, gid_t new_gid, 788 struct ucred *cred, 789 uid_t *cur_uidp, gid_t *cur_gidp, mode_t *cur_modep); 790 int vop_helper_read_shortcut(struct vop_read_args *ap); 791 792 void add_bio_ops(struct bio_ops *ops); 793 void rem_bio_ops(struct bio_ops *ops); 794 795 int journal_mountctl(struct vop_mountctl_args *ap); 796 void journal_remove_all_journals(struct mount *mp, int flags); 797 798 void mountlist_insert(struct mount *, int); 799 int mountlist_interlock(int (*callback)(struct mount *), struct mount *); 800 struct mount *mountlist_boot_getfirst(void); 801 void mountlist_remove(struct mount *mp); 802 int mountlist_exists(struct mount *mp); 803 int mountlist_scan(int (*callback)(struct mount *, void *), void *, int); 804 struct mount *mount_get_by_nc(struct namecache *ncp); 805 #else /* !_KERNEL */ 806 807 #include <sys/cdefs.h> 808 809 __BEGIN_DECLS 810 int fstatfs (int, struct statfs *); 811 int getfh (const char *, fhandle_t *); 812 int getfsstat (struct statfs *, long, int); 813 int getmntinfo (struct statfs **, int); 814 int getmntvinfo (struct statfs **, struct statvfs **, int); 815 int mount (const char *, const char *, int, void *); 816 int statfs (const char *, struct statfs *); 817 int unmount (const char *, int); 818 int fhopen (const struct fhandle *, int); 819 int fhstat (const struct fhandle *, struct stat *); 820 int fhstatfs (const struct fhandle *, struct statfs *); 821 822 /* C library stuff */ 823 void endvfsent (void); 824 struct ovfsconf *getvfsbyname (const char *); 825 struct ovfsconf *getvfsbytype (int); 826 struct ovfsconf *getvfsent (void); 827 #define getvfsbyname new_getvfsbyname 828 int new_getvfsbyname (const char *, struct vfsconf *); 829 void setvfsent (int); 830 int vfsisloadable (const char *); 831 int vfsload (const char *); 832 __END_DECLS 833 834 #endif /* _KERNEL */ 835 836 #endif /* !_SYS_MOUNT_H_ */ 837 838