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 #define VFS_MPLOCK_DECLARE int xlock_mpsafe 396 397 #define VFS_MPLOCK(mp) VFS_MPLOCK_FLAG(mp, MNTK_MPSAFE) 398 399 #define VFS_MPLOCK_FLAG(mp, flag) \ 400 do { \ 401 if (mp->mnt_kern_flag & flag) { \ 402 xlock_mpsafe = 1; \ 403 } else { \ 404 get_mplock(); /* TEMPORARY */ \ 405 lwkt_gettoken(&mp->mnt_token); \ 406 xlock_mpsafe = 0; \ 407 } \ 408 } while(0) 409 410 #define VFS_MPUNLOCK(mp) \ 411 do { \ 412 if (xlock_mpsafe == 0) { \ 413 lwkt_reltoken(&mp->mnt_token); \ 414 rel_mplock(); /* TEMPORARY */ \ 415 } \ 416 } while(0) 417 418 /* 419 * Flags for various system call interfaces. 420 * 421 * waitfor flags to vfs_sync() and getfsstat() 422 */ 423 #define MNT_WAIT 0x0001 /* synchronously wait for I/O to complete */ 424 #define MNT_NOWAIT 0x0002 /* start all I/O, but do not wait for it */ 425 #define MNT_LAZY 0x0004 /* be lazy and do not necessarily push it all */ 426 427 #define VOP_FSYNC_SYSCALL 0x0001 /* from system call */ 428 429 /* 430 * Generic file handle 431 */ 432 struct fhandle { 433 fsid_t fh_fsid; /* File system id of mount point */ 434 struct fid fh_fid; /* File sys specific id */ 435 }; 436 typedef struct fhandle fhandle_t; 437 438 /* 439 * Export arguments for local filesystem mount calls. 440 */ 441 struct export_args { 442 int ex_flags; /* export related flags */ 443 uid_t ex_root; /* mapping for root uid */ 444 struct ucred ex_anon; /* mapping for anonymous user */ 445 struct sockaddr *ex_addr; /* net address to which exported */ 446 int ex_addrlen; /* and the net address length */ 447 struct sockaddr *ex_mask; /* mask of valid bits in saddr */ 448 int ex_masklen; /* and the smask length */ 449 char *ex_indexfile; /* index file for WebNFS URLs */ 450 }; 451 452 /* 453 * Structure holding information for a publicly exported filesystem 454 * (WebNFS). Currently the specs allow just for one such filesystem. 455 */ 456 struct nfs_public { 457 int np_valid; /* Do we hold valid information */ 458 fhandle_t np_handle; /* Filehandle for pub fs (internal) */ 459 struct mount *np_mount; /* Mountpoint of exported fs */ 460 char *np_index; /* Index file */ 461 }; 462 463 /* 464 * Filesystem configuration information. One of these exists for each 465 * type of filesystem supported by the kernel. These are searched at 466 * mount time to identify the requested filesystem. 467 */ 468 struct vfsconf { 469 struct vfsops *vfc_vfsops; /* filesystem operations vector */ 470 char vfc_name[MFSNAMELEN]; /* filesystem type name */ 471 int vfc_typenum; /* historic filesystem type number */ 472 int vfc_refcount; /* number mounted of this type */ 473 int vfc_flags; /* permanent flags */ 474 STAILQ_ENTRY(vfsconf) vfc_next; /* next in list */ 475 }; 476 477 struct ovfsconf { 478 void *vfc_vfsops; 479 char vfc_name[32]; 480 int vfc_index; 481 int vfc_refcount; 482 int vfc_flags; 483 }; 484 485 /* 486 * NB: these flags refer to IMPLEMENTATION properties, not properties of 487 * any actual mounts; i.e., it does not make sense to change the flags. 488 */ 489 #define VFCF_STATIC 0x00010000 /* statically compiled into kernel */ 490 #define VFCF_NETWORK 0x00020000 /* may get data over the network */ 491 #define VFCF_READONLY 0x00040000 /* writes are not implemented */ 492 #define VFCF_SYNTHETIC 0x00080000 /* data does not represent real files */ 493 #define VFCF_LOOPBACK 0x00100000 /* aliases some other mounted FS */ 494 #define VFCF_UNICODE 0x00200000 /* stores file names as Unicode*/ 495 #define VFCF_MPSAFE 0x00400000 /* VFS is fully MPSAFE */ 496 497 /* vfsquery flags */ 498 #define VQ_NOTRESP 0x0001 /* server down */ 499 #define VQ_NEEDAUTH 0x0002 /* server bad auth */ 500 #define VQ_LOWDISK 0x0004 /* we're low on space */ 501 #define VQ_MOUNT 0x0008 /* new filesystem arrived */ 502 #define VQ_UNMOUNT 0x0010 /* filesystem has left */ 503 #define VQ_DEAD 0x0020 /* filesystem is dead, needs force unmount */ 504 #define VQ_ASSIST 0x0040 /* filesystem needs assistance from external 505 program */ 506 #define VQ_NOTRESPLOCK 0x0080 /* server lockd down */ 507 #define VQ_FLAG0100 0x0100 /* placeholder */ 508 #define VQ_FLAG0200 0x0200 /* placeholder */ 509 #define VQ_FLAG0400 0x0400 /* placeholder */ 510 #define VQ_FLAG0800 0x0800 /* placeholder */ 511 #define VQ_FLAG1000 0x1000 /* placeholder */ 512 #define VQ_FLAG2000 0x2000 /* placeholder */ 513 #define VQ_FLAG4000 0x4000 /* placeholder */ 514 #define VQ_FLAG8000 0x8000 /* placeholder */ 515 516 #ifdef _KERNEL 517 518 #ifdef MALLOC_DECLARE 519 MALLOC_DECLARE(M_MOUNT); 520 #endif 521 extern int nfs_mount_type; /* vfc_typenum for nfs, or -1 */ 522 523 struct vfsconf *vfsconf_find_by_name(const char *); 524 struct vfsconf *vfsconf_find_by_typenum(int); 525 int vfsconf_get_maxtypenum(void); 526 int vfsconf_each(int (*)(struct vfsconf *, void *), void *); 527 528 #endif 529 530 #if defined(_KERNEL) || defined(_KERNEL_STRUCTURES) 531 532 TAILQ_HEAD(mntlist, mount); /* struct mntlist */ 533 534 /* 535 * Operations supported on mounted file system. 536 */ 537 struct nlookupdata; 538 struct nlookupdata; 539 struct mbuf; 540 541 typedef int vfs_mount_t(struct mount *mp, char *path, caddr_t data, 542 struct ucred *cred); 543 typedef int vfs_start_t(struct mount *mp, int flags); 544 typedef int vfs_unmount_t(struct mount *mp, int mntflags); 545 typedef int vfs_root_t(struct mount *mp, struct vnode **vpp); 546 typedef int vfs_quotactl_t(struct mount *mp, int cmds, uid_t uid, caddr_t arg, 547 struct ucred *cred); 548 typedef int vfs_statfs_t(struct mount *mp, struct statfs *sbp, 549 struct ucred *cred); 550 typedef int vfs_statvfs_t(struct mount *mp, struct statvfs *sbp, 551 struct ucred *cred); 552 typedef int vfs_sync_t(struct mount *mp, int waitfor); 553 typedef int vfs_vget_t(struct mount *mp, struct vnode *dvp, 554 ino_t ino, struct vnode **vpp); 555 typedef int vfs_fhtovp_t(struct mount *mp, struct vnode *rootvp, 556 struct fid *fhp, struct vnode **vpp); 557 typedef int vfs_checkexp_t(struct mount *mp, struct sockaddr *nam, 558 int *extflagsp, struct ucred **credanonp); 559 typedef int vfs_vptofh_t(struct vnode *vp, struct fid *fhp); 560 typedef int vfs_init_t(struct vfsconf *); 561 typedef int vfs_uninit_t(struct vfsconf *); 562 typedef int vfs_extattrctl_t(struct mount *mp, int cmd, struct vnode *vp, 563 int attrnamespace, const char *attrname, 564 struct ucred *cred); 565 typedef int vfs_acinit_t(struct mount *mp); 566 typedef void vfs_acdone_t(struct mount *mp); 567 typedef void vfs_account_t(struct mount *mp, 568 uid_t uid, gid_t gid, int64_t delta); 569 typedef void vfs_ncpgen_set_t(struct mount *mp, struct namecache *ncp); 570 typedef int vfs_ncpgen_test_t(struct mount *mp, struct namecache *ncp); 571 typedef void vfs_modifying_t(struct mount *mp); 572 573 int vfs_mount(struct mount *mp, char *path, caddr_t data, struct ucred *cred); 574 int vfs_start(struct mount *mp, int flags); 575 int vfs_unmount(struct mount *mp, int mntflags); 576 int vfs_root(struct mount *mp, struct vnode **vpp); 577 int vfs_quotactl(struct mount *mp, int cmds, uid_t uid, caddr_t arg, 578 struct ucred *cred); 579 int vfs_statfs(struct mount *mp, struct statfs *sbp, struct ucred *cred); 580 int vfs_statvfs(struct mount *mp, struct statvfs *sbp, struct ucred *cred); 581 int vfs_sync(struct mount *mp, int waitfor); 582 int vfs_vget(struct mount *mp, struct vnode *dvp, 583 ino_t ino, struct vnode **vpp); 584 int vfs_fhtovp(struct mount *mp, struct vnode *rootvp, 585 struct fid *fhp, struct vnode **vpp); 586 int vfs_checkexp(struct mount *mp, struct sockaddr *nam, 587 int *extflagsp, struct ucred **credanonp); 588 int vfs_vptofh(struct vnode *vp, struct fid *fhp); 589 int vfs_init(struct vfsconf *vfc); 590 int vfs_uninit(struct vfsconf *vfc, struct vfsconf *vfsp); 591 int vfs_extattrctl(struct mount *mp, int cmd, struct vnode *vp, 592 int attrnamespace, const char *attrname, 593 struct ucred *cred); 594 int vfs_modifying(struct mount *mp); 595 596 struct vfsops { 597 vfs_mount_t *vfs_mount; 598 vfs_start_t *vfs_start; 599 vfs_unmount_t *vfs_unmount; 600 vfs_root_t *vfs_root; 601 vfs_quotactl_t *vfs_quotactl; 602 vfs_statfs_t *vfs_statfs; 603 vfs_sync_t *vfs_sync; 604 vfs_vget_t *vfs_vget; 605 vfs_fhtovp_t *vfs_fhtovp; 606 vfs_checkexp_t *vfs_checkexp; 607 vfs_vptofh_t *vfs_vptofh; 608 vfs_init_t *vfs_init; 609 vfs_uninit_t *vfs_uninit; 610 vfs_extattrctl_t *vfs_extattrctl; 611 vfs_statvfs_t *vfs_statvfs; 612 vfs_acinit_t *vfs_acinit; 613 vfs_acdone_t *vfs_acdone; 614 vfs_account_t *vfs_account; 615 vfs_ncpgen_set_t *vfs_ncpgen_set; 616 vfs_ncpgen_test_t *vfs_ncpgen_test; 617 vfs_modifying_t *vfs_modifying; 618 }; 619 620 #define VFS_MOUNT(MP, PATH, DATA, CRED) \ 621 vfs_mount(MP, PATH, DATA, CRED) 622 #define VFS_START(MP, FLAGS) \ 623 vfs_start(MP, FLAGS) 624 #define VFS_UNMOUNT(MP, FORCE) \ 625 vfs_unmount(MP, FORCE) 626 #define VFS_ROOT(MP, VPP) \ 627 vfs_root(MP, VPP) 628 #define VFS_QUOTACTL(MP, C, U, A, CRED) \ 629 vfs_quotactl(MP, C, U, A, CRED) 630 #define VFS_STATFS(MP, SBP, CRED) \ 631 vfs_statfs(MP, SBP, CRED) 632 #define VFS_STATVFS(MP, SBP, CRED) \ 633 vfs_statvfs(MP, SBP, CRED) 634 #define VFS_SYNC(MP, WAIT) \ 635 vfs_sync(MP, WAIT) 636 #define VFS_VGET(MP, DVP, INO, VPP) \ 637 vfs_vget(MP, DVP, INO, VPP) 638 #define VFS_FHTOVP(MP, ROOTVP, FIDP, VPP) \ 639 vfs_fhtovp(MP, ROOTVP, FIDP, VPP) 640 #define VFS_VPTOFH(VP, FIDP) \ 641 vfs_vptofh(VP, FIDP) 642 #define VFS_CHECKEXP(MP, NAM, EXFLG, CRED) \ 643 vfs_checkexp(MP, NAM, EXFLG, CRED) 644 #define VFS_EXTATTRCTL(MP, C, FVP, NS, N, CRED) \ 645 vfs_extattrctl(MP, C, FVP, NS, N, CRED) 646 #define VFS_ACCOUNT(MP, U, G, D) \ 647 if ((MP->mnt_op->vfs_account != NULL) && (D != 0)) \ 648 MP->mnt_op->vfs_account(MP, U, G, D); 649 #define VFS_ACINIT(MP, ERROR) \ 650 if (vfs_quota_enabled && MP->mnt_op->vfs_acinit != NULL) \ 651 ERROR = MP->mnt_op->vfs_acinit(MP); 652 #define VFS_ACDONE(MP) \ 653 if (vfs_quota_enabled && MP->mnt_op->vfs_acdone != NULL) \ 654 MP->mnt_op->vfs_acdone(MP); 655 #define VFS_NCPGEN_SET(MP, NCP) \ 656 MP->mnt_op->vfs_ncpgen_set(MP, NCP) 657 #define VFS_NCPGEN_TEST(MP, NCP) \ 658 MP->mnt_op->vfs_ncpgen_test(MP, NCP) 659 #define VFS_MODIFYING(MP) \ 660 MP->mnt_op->vfs_modifying(MP) 661 662 #endif 663 664 #ifdef _KERNEL 665 666 #include <sys/module.h> 667 668 #define VFS_SET(vfsops, fsname, flags) \ 669 static struct vfsconf fsname ## _vfsconf = { \ 670 &vfsops, \ 671 #fsname, \ 672 -1, \ 673 0, \ 674 flags, \ 675 { NULL }, \ 676 }; \ 677 static moduledata_t fsname ## _mod = { \ 678 #fsname, \ 679 vfs_modevent, \ 680 & fsname ## _vfsconf \ 681 }; \ 682 DECLARE_MODULE(fsname, fsname ## _mod, SI_SUB_VFS, SI_ORDER_MIDDLE) 683 684 #endif 685 686 #if defined(_KERNEL) || defined(_KERNEL_STRUCTURES) 687 688 #include <net/radix.h> 689 690 #define AF_MAX 36 /* XXX */ 691 692 /* 693 * Network address lookup element 694 */ 695 struct netcred { 696 struct radix_node netc_rnodes[2]; 697 int netc_exflags; 698 struct ucred netc_anon; 699 }; 700 701 /* 702 * Network export information 703 */ 704 struct netexport { 705 struct netcred ne_defexported; /* Default export */ 706 struct radix_node_head *ne_inethead; /* IPv4 radix */ 707 struct radix_node_head *ne_inet6head; /* IPv6 radix */ 708 struct radix_node_head *ne_maskhead; /* Shared mask radix */ 709 }; 710 #define NE_LOCK(nep) lwkt_getpooltoken(nep) 711 #define NE_UNLOCK(nep) lwkt_relpooltoken(nep) 712 #define NE_ASSERT_LOCKED(nep) \ 713 ASSERT_LWKT_TOKEN_HELD(lwkt_token_pool_lookup(nep)) 714 715 #endif 716 717 #ifdef _KERNEL 718 /* 719 * exported vnode operations 720 */ 721 void mount_hold(struct mount *); 722 void mount_drop(struct mount *); 723 int dounmount (struct mount *, int, int); 724 int vfs_setpublicfs /* set publicly exported fs */ 725 (struct mount *, struct netexport *, const struct export_args *); 726 int vfs_lock (struct mount *); /* lock a vfs */ 727 void vfs_msync (struct mount *, int); 728 void vfs_unlock (struct mount *); /* unlock a vfs */ 729 int vfs_busy (struct mount *, int); 730 int vfs_export /* process mount export info */ 731 (struct mount *, struct netexport *, const struct export_args *); 732 struct netcred *vfs_export_lookup /* lookup host in fs export list */ 733 (struct mount *, struct netexport *, struct sockaddr *); 734 int vfs_allocate_syncvnode (struct mount *); 735 void vfs_getnewfsid (struct mount *); 736 void vfs_setfsid(struct mount *mp, fsid_t *template); 737 cdev_t vfs_getrootfsid (struct mount *); 738 struct mount *vfs_getvfs (fsid_t *); /* return vfs given fsid */ 739 int vfs_modevent (module_t, int, void *); 740 int vfs_mountedon (struct vnode *); /* is a vfs mounted on vp */ 741 int vfs_rootmountalloc (char *, char *, struct mount **); 742 void vfs_unbusy (struct mount *); 743 void vfs_unmountall (int halting); 744 int vfs_register (struct vfsconf *); 745 int vfs_unregister (struct vfsconf *); 746 extern struct nfs_public nfs_pub; 747 748 /* 749 * Declarations for these vfs default operations are located in 750 * kern/vfs_default.c, they should be used instead of making "dummy" 751 * functions or casting entries in the VFS op table to "enopnotsupp()". 752 */ 753 vfs_start_t vfs_stdstart; 754 vfs_root_t vfs_stdroot; 755 vfs_quotactl_t vfs_stdquotactl; 756 vfs_statfs_t vfs_stdstatfs; 757 vfs_statvfs_t vfs_stdstatvfs; 758 vfs_sync_t vfs_stdsync; 759 vfs_sync_t vfs_stdnosync; 760 vfs_vget_t vfs_stdvget; 761 vfs_fhtovp_t vfs_stdfhtovp; 762 vfs_checkexp_t vfs_stdcheckexp; 763 vfs_vptofh_t vfs_stdvptofh; 764 vfs_init_t vfs_stdinit; 765 vfs_uninit_t vfs_stduninit; 766 vfs_extattrctl_t vfs_stdextattrctl; 767 vfs_acinit_t vfs_stdac_init; 768 vfs_acdone_t vfs_stdac_done; 769 vfs_account_t vfs_stdaccount; 770 vfs_account_t vfs_noaccount; 771 vfs_ncpgen_set_t vfs_stdncpgen_set; 772 vfs_ncpgen_test_t vfs_stdncpgen_test; 773 vfs_modifying_t vfs_stdmodifying; 774 775 struct vop_access_args; 776 int vop_helper_access(struct vop_access_args *ap, uid_t ino_uid, gid_t ino_gid, 777 mode_t ino_mode, u_int32_t ino_flags); 778 int vop_helper_setattr_flags(u_int32_t *ino_flags, u_int32_t vaflags, 779 uid_t uid, struct ucred *cred); 780 uid_t vop_helper_create_uid(struct mount *mp, mode_t dmode, uid_t duid, 781 struct ucred *cred, mode_t *modep); 782 int vop_helper_chmod(struct vnode *vp, mode_t new_mode, struct ucred *cred, 783 uid_t cur_uid, gid_t cur_gid, mode_t *cur_modep); 784 int vop_helper_chown(struct vnode *vp, uid_t new_uid, gid_t new_gid, 785 struct ucred *cred, 786 uid_t *cur_uidp, gid_t *cur_gidp, mode_t *cur_modep); 787 int vop_helper_read_shortcut(struct vop_read_args *ap); 788 789 void add_bio_ops(struct bio_ops *ops); 790 void rem_bio_ops(struct bio_ops *ops); 791 792 int journal_mountctl(struct vop_mountctl_args *ap); 793 void journal_remove_all_journals(struct mount *mp, int flags); 794 795 void mountlist_insert(struct mount *, int); 796 int mountlist_interlock(int (*callback)(struct mount *), struct mount *); 797 struct mount *mountlist_boot_getfirst(void); 798 void mountlist_remove(struct mount *mp); 799 int mountlist_exists(struct mount *mp); 800 int mountlist_scan(int (*callback)(struct mount *, void *), void *, int); 801 struct mount *mount_get_by_nc(struct namecache *ncp); 802 #else /* !_KERNEL */ 803 804 #include <sys/cdefs.h> 805 806 __BEGIN_DECLS 807 int fstatfs (int, struct statfs *); 808 int getfh (const char *, fhandle_t *); 809 int getfsstat (struct statfs *, long, int); 810 int getmntinfo (struct statfs **, int); 811 int getmntvinfo (struct statfs **, struct statvfs **, int); 812 int mount (const char *, const char *, int, void *); 813 int statfs (const char *, struct statfs *); 814 int unmount (const char *, int); 815 int fhopen (const struct fhandle *, int); 816 int fhstat (const struct fhandle *, struct stat *); 817 int fhstatfs (const struct fhandle *, struct statfs *); 818 819 /* C library stuff */ 820 void endvfsent (void); 821 struct ovfsconf *getvfsbyname (const char *); 822 struct ovfsconf *getvfsbytype (int); 823 struct ovfsconf *getvfsent (void); 824 #define getvfsbyname new_getvfsbyname 825 int new_getvfsbyname (const char *, struct vfsconf *); 826 void setvfsent (int); 827 int vfsisloadable (const char *); 828 int vfsload (const char *); 829 __END_DECLS 830 831 #endif /* _KERNEL */ 832 833 #endif /* !_SYS_MOUNT_H_ */ 834 835