1 /* 2 * Copyright (c) 1989, 1991, 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. All advertising materials mentioning features or use of this software 14 * must display the following acknowledgement: 15 * This product includes software developed by the University of 16 * California, Berkeley and its contributors. 17 * 4. Neither the name of the University nor the names of its contributors 18 * may be used to endorse or promote products derived from this software 19 * without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 * 33 * @(#)mount.h 8.21 (Berkeley) 5/20/95 34 * $FreeBSD: src/sys/sys/mount.h,v 1.89.2.7 2003/04/04 20:35:57 tegge Exp $ 35 * $DragonFly: src/sys/sys/mount.h,v 1.47 2008/09/17 21:44:19 dillon Exp $ 36 */ 37 38 #ifndef _SYS_MOUNT_H_ 39 #define _SYS_MOUNT_H_ 40 41 #include <sys/ucred.h> 42 43 #ifndef _KERNEL 44 #if !defined(_POSIX_C_SOURCE) && !defined(_XOPEN_SOURCE) 45 #include <sys/stat.h> 46 #endif /* !_POSIX_C_SOURCE */ 47 #endif /* !_KERNEL */ 48 49 #if defined(_KERNEL) || defined(_KERNEL_STRUCTURES) 50 #ifndef _SYS_QUEUE_H_ 51 #include <sys/queue.h> 52 #endif 53 #ifndef _SYS_LOCK_H_ 54 #include <sys/lock.h> 55 #endif 56 #ifndef _SYS_NAMECACHE_H_ 57 #include <sys/namecache.h> 58 #endif 59 #ifndef _SYS_STATVFS_H_ 60 #include <sys/statvfs.h> 61 #endif 62 #endif 63 64 struct thread; 65 struct journal; 66 struct vop_ops; 67 struct vop_mountctl_args; 68 struct statvfs; 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 }; 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 struct buf; 125 126 struct bio_ops { 127 TAILQ_ENTRY(bio_ops) entry; 128 void (*io_start) (struct buf *); 129 void (*io_complete) (struct buf *); 130 void (*io_deallocate) (struct buf *); 131 int (*io_fsync) (struct vnode *); 132 int (*io_sync) (struct mount *); 133 void (*io_movedeps) (struct buf *, struct buf *); 134 int (*io_countdeps) (struct buf *, int); 135 int (*io_checkread) (struct buf *); 136 int (*io_checkwrite) (struct buf *); 137 }; 138 139 /* 140 * Structure per mounted file system. Each mounted file system has an 141 * array of operations and an instance record. The file systems are 142 * put on a doubly linked list. 143 * 144 * NOTE: mnt_nvnodelist and mnt_reservedvnlist. At the moment vnodes 145 * are linked into mnt_nvnodelist. At some point in the near future the 146 * vnode list will be split into a 'dirty' and 'clean' list. mnt_nvnodelist 147 * will become the dirty list and mnt_reservedvnlist will become the 'clean' 148 * list. Filesystem kld's syncing code should remain compatible since 149 * they only need to scan the dirty vnode list (nvnodelist -> dirtyvnodelist). 150 * 151 * NOTE: All VFSs must at least populate mnt_vn_ops or those VOP ops that 152 * only take namecache pointers will not be able to find their operations 153 * vector via namecache->nc_mount. 154 */ 155 TAILQ_HEAD(vnodelst, vnode); 156 TAILQ_HEAD(journallst, journal); 157 158 struct mount { 159 TAILQ_ENTRY(mount) mnt_list; /* mount list */ 160 struct vfsops *mnt_op; /* operations on fs */ 161 struct vfsconf *mnt_vfc; /* configuration info */ 162 void *mnt_unused01; 163 struct vnode *mnt_syncer; /* syncer vnode */ 164 struct vnodelst mnt_nvnodelist; /* list of vnodes this mount */ 165 struct lock mnt_lock; /* mount structure lock */ 166 int mnt_flag; /* flags shared with user */ 167 int mnt_kern_flag; /* kernel only flags */ 168 int mnt_maxsymlinklen; /* max size of short symlink */ 169 struct statfs mnt_stat; /* cache of filesystem stats */ 170 struct statvfs mnt_vstat; /* extended stats */ 171 qaddr_t mnt_data; /* private data */ 172 time_t mnt_time; /* last time written*/ 173 u_int mnt_iosize_max; /* max IO request size */ 174 struct vnodelst mnt_reservedvnlist; /* (future) dirty vnode list */ 175 int mnt_nvnodelistsize; /* # of vnodes on this mount */ 176 177 /* 178 * ops vectors have a fixed stacking order. All primary calls run 179 * through mnt_vn_ops. This field is typically assigned to 180 * mnt_vn_norm_ops. If journaling has been enabled this field is 181 * usually assigned to mnt_vn_journal_ops. 182 */ 183 struct vop_ops *mnt_vn_use_ops; /* current ops set */ 184 185 struct vop_ops *mnt_vn_coherency_ops; /* cache coherency ops */ 186 struct vop_ops *mnt_vn_journal_ops; /* journaling ops */ 187 struct vop_ops *mnt_vn_norm_ops; /* for use by the VFS */ 188 struct vop_ops *mnt_vn_spec_ops; /* for use by the VFS */ 189 struct vop_ops *mnt_vn_fifo_ops; /* for use by the VFS */ 190 struct nchandle mnt_ncmountpt; /* mount point */ 191 struct nchandle mnt_ncmounton; /* mounted on */ 192 int mnt_refs; /* nchandle references */ 193 194 struct journallst mnt_jlist; /* list of active journals */ 195 u_int8_t *mnt_jbitmap; /* streamid bitmap */ 196 int16_t mnt_streamid; /* last streamid */ 197 198 struct bio_ops *mnt_bioops; /* BIO ops (hammer, softupd) */ 199 }; 200 201 #endif /* _KERNEL || _KERNEL_STRUCTURES */ 202 203 /* 204 * User specifiable flags. 205 */ 206 #define MNT_RDONLY 0x00000001 /* read only filesystem */ 207 #define MNT_SYNCHRONOUS 0x00000002 /* file system written synchronously */ 208 #define MNT_NOEXEC 0x00000004 /* can't exec from filesystem */ 209 #define MNT_NOSUID 0x00000008 /* don't honor setuid bits on fs */ 210 #define MNT_NODEV 0x00000010 /* don't interpret special files */ 211 #define MNT_UNION 0x00000020 /* union with underlying filesystem */ 212 #define MNT_ASYNC 0x00000040 /* file system written asynchronously */ 213 #define MNT_SUIDDIR 0x00100000 /* special handling of SUID on dirs */ 214 #define MNT_SOFTDEP 0x00200000 /* soft updates being done */ 215 #define MNT_NOSYMFOLLOW 0x00400000 /* do not follow symlinks */ 216 #define MNT_NOATIME 0x10000000 /* disable update of file access time */ 217 #define MNT_NOCLUSTERR 0x40000000 /* disable cluster read */ 218 #define MNT_NOCLUSTERW 0x80000000 /* disable cluster write */ 219 220 /* 221 * NFS export related mount flags. 222 */ 223 #define MNT_EXRDONLY 0x00000080 /* exported read only */ 224 #define MNT_EXPORTED 0x00000100 /* file system is exported */ 225 #define MNT_DEFEXPORTED 0x00000200 /* exported to the world */ 226 #define MNT_EXPORTANON 0x00000400 /* use anon uid mapping for everyone */ 227 #define MNT_EXKERB 0x00000800 /* exported with Kerberos uid mapping */ 228 #define MNT_EXPUBLIC 0x20000000 /* public export (WebNFS) */ 229 230 /* 231 * Flags set by internal operations, 232 * but visible to the user. 233 * XXX some of these are not quite right.. (I've never seen the root flag set) 234 */ 235 #define MNT_LOCAL 0x00001000 /* filesystem is stored locally */ 236 #define MNT_QUOTA 0x00002000 /* quotas are enabled on filesystem */ 237 #define MNT_ROOTFS 0x00004000 /* identifies the root filesystem */ 238 #define MNT_USER 0x00008000 /* mounted by a user */ 239 #define MNT_IGNORE 0x00800000 /* do not show entry in df */ 240 241 /* 242 * Mask of flags that are visible to statfs() 243 * XXX I think that this could now become (~(MNT_CMDFLAGS)) 244 * but the 'mount' program may need changing to handle this. 245 */ 246 #define MNT_VISFLAGMASK (MNT_RDONLY | MNT_SYNCHRONOUS | MNT_NOEXEC | \ 247 MNT_NOSUID | MNT_NODEV | MNT_UNION | \ 248 MNT_ASYNC | MNT_EXRDONLY | MNT_EXPORTED | \ 249 MNT_DEFEXPORTED | MNT_EXPORTANON| MNT_EXKERB | \ 250 MNT_LOCAL | MNT_USER | MNT_QUOTA | \ 251 MNT_ROOTFS | MNT_NOATIME | MNT_NOCLUSTERR| \ 252 MNT_NOCLUSTERW | MNT_SUIDDIR | MNT_SOFTDEP | \ 253 MNT_IGNORE | MNT_NOSYMFOLLOW | MNT_EXPUBLIC ) 254 /* 255 * External filesystem command modifier flags. 256 * Unmount can use the MNT_FORCE flag. 257 * XXX These are not STATES and really should be somewhere else. 258 */ 259 #define MNT_UPDATE 0x00010000 /* not a real mount, just an update */ 260 #define MNT_DELEXPORT 0x00020000 /* delete export host lists */ 261 #define MNT_RELOAD 0x00040000 /* reload filesystem data */ 262 #define MNT_FORCE 0x00080000 /* force unmount or readonly change */ 263 #define MNT_CMDFLAGS (MNT_UPDATE|MNT_DELEXPORT|MNT_RELOAD|MNT_FORCE) 264 /* 265 * Internal filesystem control flags stored in mnt_kern_flag. 266 * 267 * MNTK_UNMOUNT locks the mount entry so that name lookup cannot proceed 268 * past the mount point. This keeps the subtree stable during mounts 269 * and unmounts. 270 * 271 * MNTK_UNMOUNTF permits filesystems to detect a forced unmount while 272 * dounmount() is still waiting to lock the mountpoint. This allows 273 * the filesystem to cancel operations that might otherwise deadlock 274 * with the unmount attempt (used by NFS). 275 * 276 * MNTK_NOSTKMNT prevents mounting another filesystem inside the flagged one. 277 */ 278 #define MNTK_UNMOUNTF 0x00000001 /* forced unmount in progress */ 279 #define MNTK_NCALIASED 0x00800000 /* namecached aliased */ 280 #define MNTK_UNMOUNT 0x01000000 /* unmount in progress */ 281 #define MNTK_MWAIT 0x02000000 /* waiting for unmount to finish */ 282 #define MNTK_WANTRDWR 0x04000000 /* upgrade to read/write requested */ 283 #define MNTK_FSMID 0x08000000 /* getattr supports FSMIDs */ 284 #define MNTK_NOSTKMNT 0x10000000 /* no stacked mount point allowed */ 285 286 /* 287 * mountlist_*() defines 288 */ 289 #define MNTSCAN_FORWARD 0x0001 290 #define MNTSCAN_REVERSE 0x0002 291 #define MNTSCAN_NOBUSY 0x0004 292 293 #define MNTINS_FIRST 0x0001 294 #define MNTINS_LAST 0x0002 295 296 /* 297 * Sysctl CTL_VFS definitions. 298 * 299 * Second level identifier specifies which filesystem. Second level 300 * identifier VFS_VFSCONF returns information about all filesystems. 301 * Second level identifier VFS_GENERIC is non-terminal. 302 */ 303 #define VFS_VFSCONF 0 /* get configured filesystems */ 304 #define VFS_GENERIC 0 /* generic filesystem information */ 305 /* 306 * Third level identifiers for VFS_GENERIC are given below; third 307 * level identifiers for specific filesystems are given in their 308 * mount specific header files. 309 */ 310 #define VFS_MAXTYPENUM 1 /* int: highest defined filesystem type */ 311 #define VFS_CONF 2 /* struct: vfsconf for filesystem given 312 as next argument */ 313 314 /* 315 * Flags for various system call interfaces. 316 * 317 * waitfor flags to vfs_sync() and getfsstat() 318 */ 319 #define MNT_WAIT 1 /* synchronously wait for I/O to complete */ 320 #define MNT_NOWAIT 2 /* start all I/O, but do not wait for it */ 321 #define MNT_LAZY 4 /* be lazy and do not necessarily push it all */ 322 323 /* 324 * Generic file handle 325 */ 326 struct fhandle { 327 fsid_t fh_fsid; /* File system id of mount point */ 328 struct fid fh_fid; /* File sys specific id */ 329 }; 330 typedef struct fhandle fhandle_t; 331 332 /* 333 * Export arguments for local filesystem mount calls. 334 */ 335 struct export_args { 336 int ex_flags; /* export related flags */ 337 uid_t ex_root; /* mapping for root uid */ 338 struct ucred ex_anon; /* mapping for anonymous user */ 339 struct sockaddr *ex_addr; /* net address to which exported */ 340 int ex_addrlen; /* and the net address length */ 341 struct sockaddr *ex_mask; /* mask of valid bits in saddr */ 342 int ex_masklen; /* and the smask length */ 343 char *ex_indexfile; /* index file for WebNFS URLs */ 344 }; 345 346 /* 347 * Structure holding information for a publicly exported filesystem 348 * (WebNFS). Currently the specs allow just for one such filesystem. 349 */ 350 struct nfs_public { 351 int np_valid; /* Do we hold valid information */ 352 fhandle_t np_handle; /* Filehandle for pub fs (internal) */ 353 struct mount *np_mount; /* Mountpoint of exported fs */ 354 char *np_index; /* Index file */ 355 }; 356 357 /* 358 * Filesystem configuration information. One of these exists for each 359 * type of filesystem supported by the kernel. These are searched at 360 * mount time to identify the requested filesystem. 361 */ 362 struct vfsconf { 363 struct vfsops *vfc_vfsops; /* filesystem operations vector */ 364 char vfc_name[MFSNAMELEN]; /* filesystem type name */ 365 int vfc_typenum; /* historic filesystem type number */ 366 int vfc_refcount; /* number mounted of this type */ 367 int vfc_flags; /* permanent flags */ 368 struct vfsconf *vfc_next; /* next in list */ 369 }; 370 371 struct ovfsconf { 372 void *vfc_vfsops; 373 char vfc_name[32]; 374 int vfc_index; 375 int vfc_refcount; 376 int vfc_flags; 377 }; 378 379 /* 380 * NB: these flags refer to IMPLEMENTATION properties, not properties of 381 * any actual mounts; i.e., it does not make sense to change the flags. 382 */ 383 #define VFCF_STATIC 0x00010000 /* statically compiled into kernel */ 384 #define VFCF_NETWORK 0x00020000 /* may get data over the network */ 385 #define VFCF_READONLY 0x00040000 /* writes are not implemented */ 386 #define VFCF_SYNTHETIC 0x00080000 /* data does not represent real files */ 387 #define VFCF_LOOPBACK 0x00100000 /* aliases some other mounted FS */ 388 #define VFCF_UNICODE 0x00200000 /* stores file names as Unicode*/ 389 390 #ifdef _KERNEL 391 392 #ifdef MALLOC_DECLARE 393 MALLOC_DECLARE(M_MOUNT); 394 #endif 395 extern int maxvfsconf; /* highest defined filesystem type */ 396 extern int nfs_mount_type; /* vfc_typenum for nfs, or -1 */ 397 extern struct vfsconf *vfsconf; /* head of list of filesystem types */ 398 399 #endif 400 401 #if defined(_KERNEL) || defined(_KERNEL_STRUCTURES) 402 403 TAILQ_HEAD(mntlist, mount); /* struct mntlist */ 404 405 /* 406 * Operations supported on mounted file system. 407 */ 408 #ifdef __STDC__ 409 struct nlookupdata; 410 struct nlookupdata; 411 struct mbuf; 412 #endif 413 414 typedef int vfs_mount_t(struct mount *mp, char *path, caddr_t data, 415 struct ucred *cred); 416 typedef int vfs_start_t(struct mount *mp, int flags); 417 typedef int vfs_unmount_t(struct mount *mp, int mntflags); 418 typedef int vfs_root_t(struct mount *mp, struct vnode **vpp); 419 typedef int vfs_quotactl_t(struct mount *mp, int cmds, uid_t uid, caddr_t arg, 420 struct ucred *cred); 421 typedef int vfs_statfs_t(struct mount *mp, struct statfs *sbp, 422 struct ucred *cred); 423 typedef int vfs_statvfs_t(struct mount *mp, struct statvfs *sbp, 424 struct ucred *cred); 425 typedef int vfs_sync_t(struct mount *mp, int waitfor); 426 typedef int vfs_vget_t(struct mount *mp, ino_t ino, struct vnode **vpp); 427 typedef int vfs_fhtovp_t(struct mount *mp, struct vnode *rootvp, 428 struct fid *fhp, struct vnode **vpp); 429 typedef int vfs_checkexp_t(struct mount *mp, struct sockaddr *nam, 430 int *extflagsp, struct ucred **credanonp); 431 typedef int vfs_vptofh_t(struct vnode *vp, struct fid *fhp); 432 typedef int vfs_init_t(struct vfsconf *); 433 typedef int vfs_uninit_t(struct vfsconf *); 434 typedef int vfs_extattrctl_t(struct mount *mp, int cmd,const char *attrname, 435 caddr_t arg, struct ucred *cred); 436 437 struct vfsops { 438 vfs_mount_t *vfs_mount; 439 vfs_start_t *vfs_start; 440 vfs_unmount_t *vfs_unmount; 441 vfs_root_t *vfs_root; 442 vfs_quotactl_t *vfs_quotactl; 443 vfs_statfs_t *vfs_statfs; 444 vfs_sync_t *vfs_sync; 445 vfs_vget_t *vfs_vget; 446 vfs_fhtovp_t *vfs_fhtovp; 447 vfs_checkexp_t *vfs_checkexp; 448 vfs_vptofh_t *vfs_vptofh; 449 vfs_init_t *vfs_init; 450 vfs_uninit_t *vfs_uninit; 451 vfs_extattrctl_t *vfs_extattrctl; 452 vfs_statvfs_t *vfs_statvfs; 453 }; 454 455 #define VFS_MOUNT(MP, PATH, DATA, CRED) \ 456 (*(MP)->mnt_op->vfs_mount)(MP, PATH, DATA, CRED) 457 #define VFS_START(MP, FLAGS) (*(MP)->mnt_op->vfs_start)(MP, FLAGS) 458 #define VFS_UNMOUNT(MP, FORCE) (*(MP)->mnt_op->vfs_unmount)(MP, FORCE) 459 #define VFS_ROOT(MP, VPP) (*(MP)->mnt_op->vfs_root)(MP, VPP) 460 #define VFS_QUOTACTL(MP,C,U,A,CRED) \ 461 (*(MP)->mnt_op->vfs_quotactl)(MP, C, U, A, CRED) 462 #define VFS_STATFS(MP, SBP, CRED) (*(MP)->mnt_op->vfs_statfs)(MP, SBP, CRED) 463 #define VFS_STATVFS(MP, SBP, CRED) (*(MP)->mnt_op->vfs_statvfs)(MP, SBP, CRED) 464 #define VFS_SYNC(MP, WAIT) (*(MP)->mnt_op->vfs_sync)(MP, WAIT) 465 #define VFS_VGET(MP, INO, VPP) (*(MP)->mnt_op->vfs_vget)(MP, INO, VPP) 466 #define VFS_FHTOVP(MP, ROOTVP, FIDP, VPP) \ 467 (*(MP)->mnt_op->vfs_fhtovp)(MP, ROOTVP, FIDP, VPP) 468 #define VFS_VPTOFH(VP, FIDP) (*(VP)->v_mount->mnt_op->vfs_vptofh)(VP, FIDP) 469 #define VFS_CHECKEXP(MP, NAM, EXFLG, CRED) \ 470 (*(MP)->mnt_op->vfs_checkexp)(MP, NAM, EXFLG, CRED) 471 #define VFS_EXTATTRCTL(MP, C, N, A, CRED) \ 472 (*(MP)->mnt_op->vfs_extattrctl)(MP, C, N, A, CRED) 473 474 #endif 475 476 #ifdef _KERNEL 477 478 #include <sys/module.h> 479 480 #define VFS_SET(vfsops, fsname, flags) \ 481 static struct vfsconf fsname ## _vfsconf = { \ 482 &vfsops, \ 483 #fsname, \ 484 -1, \ 485 0, \ 486 flags, \ 487 NULL \ 488 }; \ 489 static moduledata_t fsname ## _mod = { \ 490 #fsname, \ 491 vfs_modevent, \ 492 & fsname ## _vfsconf \ 493 }; \ 494 DECLARE_MODULE(fsname, fsname ## _mod, SI_SUB_VFS, SI_ORDER_MIDDLE) 495 496 #endif 497 498 #if defined(_KERNEL) || defined(_KERNEL_STRUCTURES) 499 500 #include <net/radix.h> 501 502 #define AF_MAX 35 /* XXX */ 503 504 /* 505 * Network address lookup element 506 */ 507 struct netcred { 508 struct radix_node netc_rnodes[2]; 509 int netc_exflags; 510 struct ucred netc_anon; 511 }; 512 513 /* 514 * Network export information 515 */ 516 struct netexport { 517 struct netcred ne_defexported; /* Default export */ 518 struct radix_node_head *ne_rtable[AF_MAX+1]; /* Individual exports */ 519 }; 520 521 #endif 522 523 #ifdef _KERNEL 524 525 extern char *mountrootfsname; 526 527 /* 528 * exported vnode operations 529 */ 530 int dounmount (struct mount *, int); 531 int vfs_setpublicfs /* set publicly exported fs */ 532 (struct mount *, struct netexport *, const struct export_args *); 533 int vfs_lock (struct mount *); /* lock a vfs */ 534 void vfs_msync (struct mount *, int); 535 void vfs_unlock (struct mount *); /* unlock a vfs */ 536 int vfs_busy (struct mount *, int); 537 void vfs_bufstats(void); 538 int vfs_export /* process mount export info */ 539 (struct mount *, struct netexport *, const struct export_args *); 540 struct netcred *vfs_export_lookup /* lookup host in fs export list */ 541 (struct mount *, struct netexport *, struct sockaddr *); 542 int vfs_allocate_syncvnode (struct mount *); 543 void vfs_getnewfsid (struct mount *); 544 int vfs_setfsid(struct mount *mp, fsid_t *template); 545 cdev_t vfs_getrootfsid (struct mount *); 546 struct mount *vfs_getvfs (fsid_t *); /* return vfs given fsid */ 547 int vfs_modevent (module_t, int, void *); 548 int vfs_mountedon (struct vnode *); /* is a vfs mounted on vp */ 549 int vfs_rootmountalloc (char *, char *, struct mount **); 550 void vfs_unbusy (struct mount *); 551 void vfs_unmountall (void); 552 int vfs_register (struct vfsconf *); 553 int vfs_unregister (struct vfsconf *); 554 extern struct nfs_public nfs_pub; 555 556 /* 557 * Declarations for these vfs default operations are located in 558 * kern/vfs_default.c, they should be used instead of making "dummy" 559 * functions or casting entries in the VFS op table to "enopnotsupp()". 560 */ 561 vfs_start_t vfs_stdstart; 562 vfs_mount_t vfs_stdmount; 563 vfs_unmount_t vfs_stdunmount; 564 vfs_root_t vfs_stdroot; 565 vfs_quotactl_t vfs_stdquotactl; 566 vfs_statfs_t vfs_stdstatfs; 567 vfs_statvfs_t vfs_stdstatvfs; 568 vfs_sync_t vfs_stdsync; 569 vfs_sync_t vfs_stdnosync; 570 vfs_vget_t vfs_stdvget; 571 vfs_fhtovp_t vfs_stdfhtovp; 572 vfs_checkexp_t vfs_stdcheckexp; 573 vfs_vptofh_t vfs_stdvptofh; 574 vfs_init_t vfs_stdinit; 575 vfs_uninit_t vfs_stduninit; 576 vfs_extattrctl_t vfs_stdextattrctl; 577 578 struct vop_access_args; 579 int vop_helper_access(struct vop_access_args *ap, uid_t ino_uid, gid_t ino_gid, 580 mode_t ino_mode, u_int32_t ino_flags); 581 int vop_helper_setattr_flags(u_int32_t *ino_flags, u_int32_t vaflags, 582 uid_t uid, struct ucred *cred); 583 uid_t vop_helper_create_uid(struct mount *mp, mode_t dmode, uid_t duid, 584 struct ucred *cred, mode_t *modep); 585 int vop_helper_chmod(struct vnode *vp, mode_t new_mode, struct ucred *cred, 586 uid_t cur_uid, gid_t cur_gid, mode_t *cur_modep); 587 int vop_helper_chown(struct vnode *vp, uid_t new_uid, gid_t new_gid, 588 struct ucred *cred, 589 uid_t *cur_uidp, gid_t *cur_gidp, mode_t *cur_modep); 590 591 void add_bio_ops(struct bio_ops *ops); 592 void rem_bio_ops(struct bio_ops *ops); 593 594 int journal_mountctl(struct vop_mountctl_args *ap); 595 void journal_remove_all_journals(struct mount *mp, int flags); 596 597 void mountlist_insert(struct mount *, int); 598 int mountlist_interlock(int (*callback)(struct mount *), struct mount *); 599 struct mount *mountlist_boot_getfirst(void); 600 void mountlist_remove(struct mount *mp); 601 int mountlist_scan(int (*callback)(struct mount *, void *), void *, int); 602 603 #else /* !_KERNEL */ 604 605 #include <sys/cdefs.h> 606 607 __BEGIN_DECLS 608 int fstatfs (int, struct statfs *); 609 int getfh (const char *, fhandle_t *); 610 int getfsstat (struct statfs *, long, int); 611 int getmntinfo (struct statfs **, int); 612 int getmntvinfo (struct statfs **, struct statvfs **, int); 613 int mount (const char *, const char *, int, void *); 614 int statfs (const char *, struct statfs *); 615 int unmount (const char *, int); 616 int fhopen (const struct fhandle *, int); 617 int fhstat (const struct fhandle *, struct stat *); 618 int fhstatfs (const struct fhandle *, struct statfs *); 619 620 /* C library stuff */ 621 void endvfsent (void); 622 struct ovfsconf *getvfsbyname (const char *); 623 struct ovfsconf *getvfsbytype (int); 624 struct ovfsconf *getvfsent (void); 625 #define getvfsbyname new_getvfsbyname 626 int new_getvfsbyname (const char *, struct vfsconf *); 627 void setvfsent (int); 628 int vfsisloadable (const char *); 629 int vfsload (const char *); 630 __END_DECLS 631 632 #endif /* _KERNEL */ 633 634 #endif /* !_SYS_MOUNT_H_ */ 635 636