1/* $OpenBSD: mount.h,v 1.151 2024/02/03 18:51:58 beck Exp $ */ 2/* $NetBSD: mount.h,v 1.48 1996/02/18 11:55:47 fvdl Exp $ */ 3 4/* 5 * Copyright (c) 1989, 1991, 1993 6 * The Regents of the University of California. All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 3. Neither the name of the University nor the names of its contributors 17 * may be used to endorse or promote products derived from this software 18 * without specific prior written permission. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 23 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 30 * SUCH DAMAGE. 31 * 32 * @(#)mount.h 8.15 (Berkeley) 7/14/94 33 */ 34 35#ifndef _SYS_MOUNT_H_ 36#define _SYS_MOUNT_H_ 37 38#include <sys/cdefs.h> 39#ifndef _KERNEL 40#include <sys/ucred.h> 41#endif 42#include <sys/queue.h> 43#include <sys/rwlock.h> 44 45typedef struct { int32_t val[2]; } fsid_t; /* file system id type */ 46 47/* 48 * File identifier. 49 * These are unique per filesystem on a single machine. 50 */ 51#define MAXFIDSZ 16 52 53struct fid { 54 u_short fid_len; /* length of data in bytes */ 55 u_short fid_reserved; /* force longword alignment */ 56 char fid_data[MAXFIDSZ]; /* data (variable length) */ 57}; 58 59/* 60 * Export arguments for local filesystem mount calls. 61 */ 62struct export_args { 63 int ex_flags; /* export related flags */ 64 uid_t ex_root; /* mapping for root uid */ 65 struct xucred ex_anon; /* mapping for anonymous user */ 66 struct sockaddr *ex_addr; /* net address to which exported */ 67 int ex_addrlen; /* and the net address length */ 68 struct sockaddr *ex_mask; /* mask of valid bits in saddr */ 69 int ex_masklen; /* and the smask length */ 70}; 71 72/* 73 * Arguments to mount UFS-based filesystems 74 */ 75struct ufs_args { 76 char *fspec; /* block special device to mount */ 77 struct export_args export_info;/* network export information */ 78}; 79 80/* 81 * Arguments to mount MFS 82 */ 83struct mfs_args { 84 char *fspec; /* name to export for statfs */ 85 struct export_args export_info;/* if exported MFSes are supported */ 86 caddr_t base; /* base of file system in memory */ 87 u_long size; /* size of file system */ 88}; 89 90/* 91 * Arguments to mount ISO 9660 filesystems. 92 */ 93struct iso_args { 94 char *fspec; /* block special device to mount */ 95 struct export_args export_info;/* network export info */ 96 int flags; /* mounting flags, see below */ 97 int sess; /* start sector of session */ 98}; 99 100#define ISOFSMNT_NORRIP 0x00000001 /* disable Rock Ridge Ext.*/ 101#define ISOFSMNT_GENS 0x00000002 /* enable generation numbers */ 102#define ISOFSMNT_EXTATT 0x00000004 /* enable extended attr. */ 103#define ISOFSMNT_NOJOLIET 0x00000008 /* disable Joliet Ext.*/ 104#define ISOFSMNT_SESS 0x00000010 /* use iso_args.sess */ 105 106/* 107 * Arguments to mount NFS 108 */ 109#define NFS_ARGSVERSION 4 /* change when nfs_args changes */ 110struct nfs_args { 111 int version; /* args structure version number */ 112 struct sockaddr *addr; /* file server address */ 113 int addrlen; /* length of address */ 114 int sotype; /* Socket type */ 115 int proto; /* and Protocol */ 116 u_char *fh; /* File handle to be mounted */ 117 int fhsize; /* Size, in bytes, of fh */ 118 int flags; /* flags */ 119 int wsize; /* write size in bytes */ 120 int rsize; /* read size in bytes */ 121 int readdirsize; /* readdir size in bytes */ 122 int timeo; /* initial timeout in .1 secs */ 123 int retrans; /* times to retry send */ 124 int maxgrouplist; /* Max. size of group list */ 125 int readahead; /* # of blocks to readahead */ 126 int leaseterm; /* Term (sec) of lease */ 127 int deadthresh; /* Retrans threshold */ 128 char *hostname; /* server's name */ 129 int acregmin; /* Attr cache file recently modified */ 130 int acregmax; /* ac file not recently modified */ 131 int acdirmin; /* ac for dir recently modified */ 132 int acdirmax; /* ac for dir not recently modified */ 133}; 134 135/* 136 * NFS mount option flags 137 */ 138#define NFSMNT_RESVPORT 0x00000000 /* always use reserved ports */ 139#define NFSMNT_SOFT 0x00000001 /* soft mount (hard is default) */ 140#define NFSMNT_WSIZE 0x00000002 /* set write size */ 141#define NFSMNT_RSIZE 0x00000004 /* set read size */ 142#define NFSMNT_TIMEO 0x00000008 /* set initial timeout */ 143#define NFSMNT_RETRANS 0x00000010 /* set number of request retries */ 144#define NFSMNT_MAXGRPS 0x00000020 /* set maximum grouplist size */ 145#define NFSMNT_INT 0x00000040 /* allow interrupts on hard mount */ 146#define NFSMNT_NOCONN 0x00000080 /* Don't Connect the socket */ 147#define NFSMNT_NQNFS 0x00000100 /* Use Nqnfs protocol */ 148#define NFSMNT_NFSV3 0x00000200 /* Use NFS Version 3 protocol */ 149#define NFSMNT_KERB 0x00000400 /* Use Kerberos authentication */ 150#define NFSMNT_DUMBTIMR 0x00000800 /* Don't estimate rtt dynamically */ 151#define NFSMNT_LEASETERM 0x00001000 /* set lease term (nqnfs) */ 152#define NFSMNT_READAHEAD 0x00002000 /* set read ahead */ 153#define NFSMNT_DEADTHRESH 0x00004000 /* set dead server retry thresh */ 154#define NFSMNT_NOAC 0x00008000 /* disable attribute cache */ 155#define NFSMNT_RDIRPLUS 0x00010000 /* Use Readdirplus for V3 */ 156#define NFSMNT_READDIRSIZE 0x00020000 /* Set readdir size */ 157 158/* Flags valid only in mount syscall arguments */ 159#define NFSMNT_ACREGMIN 0x00040000 /* acregmin field valid */ 160#define NFSMNT_ACREGMAX 0x00080000 /* acregmax field valid */ 161#define NFSMNT_ACDIRMIN 0x00100000 /* acdirmin field valid */ 162#define NFSMNT_ACDIRMAX 0x00200000 /* acdirmax field valid */ 163 164/* Flags valid only in kernel */ 165#define NFSMNT_INTERNAL 0xfffc0000 /* Bits set internally */ 166#define NFSMNT_HASWRITEVERF 0x00040000 /* Has write verifier for V3 */ 167#define NFSMNT_GOTPATHCONF 0x00080000 /* Got the V3 pathconf info */ 168#define NFSMNT_GOTFSINFO 0x00100000 /* Got the V3 fsinfo */ 169#define NFSMNT_MNTD 0x00200000 /* Mnt server for mnt point */ 170#define NFSMNT_DISMINPROG 0x00400000 /* Dismount in progress */ 171#define NFSMNT_DISMNT 0x00800000 /* Dismounted */ 172#define NFSMNT_SNDLOCK 0x01000000 /* Send socket lock */ 173#define NFSMNT_WANTSND 0x02000000 /* Want above */ 174#define NFSMNT_RCVLOCK 0x04000000 /* Rcv socket lock */ 175#define NFSMNT_WANTRCV 0x08000000 /* Want above */ 176#define NFSMNT_WAITAUTH 0x10000000 /* Wait for authentication */ 177#define NFSMNT_HASAUTH 0x20000000 /* Has authenticator */ 178#define NFSMNT_WANTAUTH 0x40000000 /* Wants an authenticator */ 179#define NFSMNT_AUTHERR 0x80000000 /* Authentication error */ 180 181/* 182 * Arguments to mount MSDOS filesystems. 183 */ 184struct msdosfs_args { 185 char *fspec; /* blocks special holding the fs to mount */ 186 struct export_args export_info; 187 /* network export information */ 188 uid_t uid; /* uid that owns msdosfs files */ 189 gid_t gid; /* gid that owns msdosfs files */ 190 mode_t mask; /* mask to be applied for msdosfs perms */ 191 int flags; /* see below */ 192}; 193 194/* 195 * Msdosfs mount options: 196 */ 197#define MSDOSFSMNT_SHORTNAME 0x01 /* Force old DOS short names only */ 198#define MSDOSFSMNT_LONGNAME 0x02 /* Force Win'95 long names */ 199#define MSDOSFSMNT_NOWIN95 0x04 /* Completely ignore Win95 entries */ 200 201/* 202 * Arguments to mount ntfs filesystems 203 */ 204struct ntfs_args { 205 char *fspec; /* block special device to mount */ 206 struct export_args export_info;/* network export information */ 207 uid_t uid; /* uid that owns ntfs files */ 208 gid_t gid; /* gid that owns ntfs files */ 209 mode_t mode; /* mask to be applied for ntfs perms */ 210 u_long flag; /* additional flags */ 211}; 212 213/* 214 * ntfs mount options: 215 */ 216#define NTFS_MFLAG_CASEINS 0x00000001 217#define NTFS_MFLAG_ALLNAMES 0x00000002 218 219/* Arguments to mount UDF file systems */ 220struct udf_args { 221 char *fspec; /* Block special device to mount */ 222 u_int32_t lastblock; /* Special device last block */ 223}; 224 225/* 226 * Arguments to mount tmpfs file systems 227 */ 228#define TMPFS_ARGS_VERSION 1 229struct tmpfs_args { 230 int ta_version; 231 232 /* Size counters. */ 233 ino_t ta_nodes_max; 234 off_t ta_size_max; 235 236 /* Root node attributes. */ 237 uid_t ta_root_uid; 238 gid_t ta_root_gid; 239 mode_t ta_root_mode; 240}; 241 242/* 243 * Arguments to mount fusefs filesystems 244 */ 245struct fusefs_args { 246 char *name; 247 int fd; 248 int max_read; 249 250 /* 251 * FUSE does not allow the file system to be accessed by other users 252 * unless this option is specified. This is to prevent unintentional 253 * denial of service to other users if the file system is not 254 * responding. e.g. user executes df(1) or cron job that scans mounted 255 * file systems. 256 */ 257 int allow_other; 258}; 259 260/* 261 * file system statistics 262 */ 263 264#define MFSNAMELEN 16 /* length of fs type name, including nul */ 265#define MNAMELEN 90 /* length of buffer for returned name */ 266 267/* per-filesystem mount options */ 268union mount_info { 269 struct ufs_args ufs_args; 270 struct mfs_args mfs_args; 271 struct nfs_args nfs_args; 272 struct iso_args iso_args; 273 struct msdosfs_args msdosfs_args; 274 struct ntfs_args ntfs_args; 275 struct tmpfs_args tmpfs_args; 276 char __align[160]; /* 64-bit alignment and room to grow */ 277}; 278 279/* new statfs structure with mount options and statvfs fields */ 280struct statfs { 281 u_int32_t f_flags; /* copy of mount flags */ 282 u_int32_t f_bsize; /* file system block size */ 283 u_int32_t f_iosize; /* optimal transfer block size */ 284 285 /* unit is f_bsize */ 286 u_int64_t f_blocks; /* total data blocks in file system */ 287 u_int64_t f_bfree; /* free blocks in fs */ 288 int64_t f_bavail; /* free blocks avail to non-superuser */ 289 290 u_int64_t f_files; /* total file nodes in file system */ 291 u_int64_t f_ffree; /* free file nodes in fs */ 292 int64_t f_favail; /* free file nodes avail to non-root */ 293 294 u_int64_t f_syncwrites; /* count of sync writes since mount */ 295 u_int64_t f_syncreads; /* count of sync reads since mount */ 296 u_int64_t f_asyncwrites; /* count of async writes since mount */ 297 u_int64_t f_asyncreads; /* count of async reads since mount */ 298 299 fsid_t f_fsid; /* file system id */ 300 u_int32_t f_namemax; /* maximum filename length */ 301 uid_t f_owner; /* user that mounted the file system */ 302 u_int64_t f_ctime; /* last mount [-u] time */ 303 304 char f_fstypename[MFSNAMELEN]; /* fs type name */ 305 char f_mntonname[MNAMELEN]; /* directory on which mounted */ 306 char f_mntfromname[MNAMELEN]; /* mounted file system */ 307 char f_mntfromspec[MNAMELEN]; /* special for mount request */ 308 union mount_info mount_info; /* per-filesystem mount options */ 309}; 310 311 312/* 313 * File system types. 314 */ 315#define MOUNT_FFS "ffs" /* UNIX "Fast" Filesystem */ 316#define MOUNT_UFS MOUNT_FFS /* for compatibility */ 317#define MOUNT_NFS "nfs" /* Network Filesystem */ 318#define MOUNT_MFS "mfs" /* Memory Filesystem */ 319#define MOUNT_MSDOS "msdos" /* MSDOS Filesystem */ 320#define MOUNT_AFS "afs" /* Andrew Filesystem */ 321#define MOUNT_CD9660 "cd9660" /* ISO9660 (aka CDROM) Filesystem */ 322#define MOUNT_EXT2FS "ext2fs" /* Second Extended Filesystem */ 323#define MOUNT_NCPFS "ncpfs" /* NetWare Network File System */ 324#define MOUNT_NTFS "ntfs" /* NTFS */ 325#define MOUNT_UDF "udf" /* UDF */ 326#define MOUNT_TMPFS "tmpfs" /* tmpfs */ 327#define MOUNT_FUSEFS "fuse" /* FUSE */ 328 329/* 330 * Structure per mounted file system. Each mounted file system has an 331 * array of operations and an instance record. The file systems are 332 * put on a doubly linked list. 333 */ 334struct mount { 335 TAILQ_ENTRY(mount) mnt_list; /* mount list */ 336 SLIST_ENTRY(mount) mnt_dounmount; /* unmount work queue */ 337 const struct vfsops *mnt_op; /* operations on fs */ 338 struct vfsconf *mnt_vfc; /* configuration info */ 339 struct vnode *mnt_vnodecovered; /* vnode we mounted on */ 340 struct vnode *mnt_syncer; /* syncer vnode */ 341 TAILQ_HEAD(, vnode) mnt_vnodelist; /* list of vnodes this mount */ 342 struct rwlock mnt_lock; /* mount structure lock */ 343 int mnt_flag; /* flags */ 344 struct statfs mnt_stat; /* cache of filesystem stats */ 345 void *mnt_data; /* private data */ 346}; 347 348/* 349 * Mount flags. 350 * 351 * Unmount uses MNT_FORCE flag. 352 */ 353#define MNT_RDONLY 0x00000001 /* read only filesystem */ 354#define MNT_SYNCHRONOUS 0x00000002 /* file system written synchronously */ 355#define MNT_NOEXEC 0x00000004 /* can't exec from filesystem */ 356#define MNT_NOSUID 0x00000008 /* don't honor setuid bits on fs */ 357#define MNT_NODEV 0x00000010 /* don't interpret special files */ 358#define MNT_NOPERM 0x00000020 /* don't enforce permission checks */ 359#define MNT_ASYNC 0x00000040 /* file system written asynchronously */ 360#define MNT_WXALLOWED 0x00000800 /* filesystem allows W|X mappings */ 361 362/* 363 * exported mount flags. 364 */ 365#define MNT_EXRDONLY 0x00000080 /* exported read only */ 366#define MNT_EXPORTED 0x00000100 /* file system is exported */ 367#define MNT_DEFEXPORTED 0x00000200 /* exported to the world */ 368#define MNT_EXPORTANON 0x00000400 /* use anon uid mapping for everyone */ 369 370/* 371 * Flags set by internal operations. 372 */ 373#define MNT_LOCAL 0x00001000 /* filesystem is stored locally */ 374#define MNT_QUOTA 0x00002000 /* quotas are enabled on filesystem */ 375#define MNT_ROOTFS 0x00004000 /* identifies the root filesystem */ 376 377/* 378 * Extra post 4.4BSD-lite2 mount flags. 379 */ 380#define MNT_NOATIME 0x00008000 /* don't update access times on fs */ 381 382/* 383 * Mask of flags that are visible to statfs() 384 */ 385#define MNT_VISFLAGMASK 0x0400ffff 386 387#define MNT_BITS \ 388 "\20\001RDONLY\002SYNCHRONOUS\003NOEXEC\004NOSUID\005NODEV\006NOPERM" \ 389 "\007ASYNC\010EXRDONLY\011EXPORTED\012DEFEXPORTED\013EXPORTANON" \ 390 "\014WXALLOWED\015LOCAL\016QUOTA\017ROOTFS\020NOATIME\021UPDATE" \ 391 "\022DELEXPORT\023RELOAD\024FORCE\025STALLED\026SWAPPABLE\032WANTRDWR" \ 392 "\033SOFTDEP\034DOOMED" 393 394/* 395 * filesystem control flags. 396 */ 397#define MNT_UPDATE 0x00010000 /* not a real mount, just an update */ 398#define MNT_DELEXPORT 0x00020000 /* delete export host lists */ 399#define MNT_RELOAD 0x00040000 /* reload filesystem data */ 400#define MNT_FORCE 0x00080000 /* force unmount or readonly change */ 401#define MNT_STALLED 0x00100000 /* filesystem stalled */ 402#define MNT_SWAPPABLE 0x00200000 /* filesystem can be used for swap */ 403#define MNT_WANTRDWR 0x02000000 /* want upgrade to read/write */ 404#define MNT_SOFTDEP 0x04000000 /* soft dependencies being done - now ignored */ 405#define MNT_DOOMED 0x08000000 /* device behind filesystem is gone */ 406 407#ifdef _KERNEL 408#define MNT_OP_FLAGS (MNT_UPDATE | MNT_RELOAD | MNT_FORCE | MNT_WANTRDWR) 409#endif 410 411/* 412 * Flags for various system call interfaces. 413 * 414 * waitfor flags to vfs_sync() and getfsstat() 415 */ 416#define MNT_WAIT 1 /* synchronously wait for I/O to complete */ 417#define MNT_NOWAIT 2 /* start all I/O, but do not wait for it */ 418#define MNT_LAZY 3 /* push data not written by filesystem syncer */ 419 420/* 421 * Generic file handle 422 */ 423struct fhandle { 424 fsid_t fh_fsid; /* File system id of mount point */ 425 struct fid fh_fid; /* File sys specific id */ 426}; 427typedef struct fhandle fhandle_t; 428 429/* 430 * Sysctl CTL_VFS definitions. 431 * 432 * Second level identifier specifies which filesystem. Second level 433 * identifier VFS_GENERIC returns information about all filesystems. 434 */ 435#define VFS_GENERIC 0 /* generic filesystem information */ 436/* 437 * Third level identifiers for VFS_GENERIC are given below; third 438 * level identifiers for specific filesystems are given in their 439 * mount specific header files. 440 */ 441#define VFS_MAXTYPENUM 1 /* int: highest defined filesystem type */ 442#define VFS_CONF 2 /* struct: vfsconf for filesystem given 443 as next argument */ 444#define VFS_BCACHESTAT 3 /* struct: buffer cache statistics given 445 as next argument */ 446#define CTL_VFSGENCTL_NAMES { \ 447 { 0, 0 }, \ 448 { "maxtypenum", CTLTYPE_INT }, \ 449 { "conf", CTLTYPE_NODE }, \ 450 { "bcachestat", CTLTYPE_STRUCT } \ 451} 452 453/* 454 * Filesystem configuration information. One of these exists for each 455 * type of filesystem supported by the kernel. These are searched at 456 * mount time to identify the requested filesystem. 457 */ 458struct vfsconf { 459 const struct vfsops *vfc_vfsops; /* filesystem operations vector */ 460 char vfc_name[MFSNAMELEN]; /* filesystem type name */ 461 int vfc_typenum; /* historic filesystem type number */ 462 u_int vfc_refcount; /* number mounted of this type */ 463 int vfc_flags; /* permanent flags */ 464 size_t vfc_datasize; /* size of data args */ 465}; 466 467/* buffer cache statistics */ 468struct bcachestats { 469 int64_t numbufs; /* number of buffers allocated */ 470 int64_t numbufpages; /* number of pages in buffer cache */ 471 int64_t numdirtypages; /* number of dirty free pages */ 472 int64_t numcleanpages; /* number of clean free pages */ 473 int64_t pendingwrites; /* number of pending writes */ 474 int64_t pendingreads; /* number of pending reads */ 475 int64_t numwrites; /* total writes started */ 476 int64_t numreads; /* total reads started */ 477 int64_t cachehits; /* total reads found in cache */ 478 int64_t busymapped; /* number of busy and mapped buffers */ 479 int64_t dmapages; /* dma reachable pages in buffer cache */ 480 int64_t highpages; /* pages above dma region */ 481 int64_t delwribufs; /* delayed write buffers */ 482 int64_t kvaslots; /* kva slots total */ 483 int64_t kvaslots_avail; /* available kva slots */ 484 int64_t highflips; /* total flips to above DMA */ 485 int64_t highflops; /* total failed flips to above DMA */ 486 int64_t dmaflips; /* total flips from high to DMA */ 487}; 488#ifdef _KERNEL 489extern struct bcachestats bcstats; 490extern long buflowpages, bufhighpages, bufbackpages; 491#define BUFPAGES_DEFICIT (((buflowpages - bcstats.numbufpages) < 0) ? 0 \ 492 : buflowpages - bcstats.numbufpages) 493#define BUFPAGES_INACT (((bcstats.numcleanpages - buflowpages) < 0) ? 0 \ 494 : bcstats.numcleanpages - buflowpages) 495extern int bufcachepercent; 496extern void bufadjust(int); 497struct uvm_constraint_range; 498extern int bufbackoff(struct uvm_constraint_range*, long); 499 500/* 501 * Operations supported on mounted file system. 502 */ 503struct nameidata; 504struct mbuf; 505 506extern int maxvfsconf; /* highest defined filesystem type */ 507 508struct vfsops { 509 int (*vfs_mount)(struct mount *mp, const char *path, 510 void *data, 511 struct nameidata *ndp, struct proc *p); 512 int (*vfs_start)(struct mount *mp, int flags, 513 struct proc *p); 514 int (*vfs_unmount)(struct mount *mp, int mntflags, 515 struct proc *p); 516 int (*vfs_root)(struct mount *mp, struct vnode **vpp); 517 int (*vfs_quotactl)(struct mount *mp, int cmds, uid_t uid, 518 caddr_t arg, struct proc *p); 519 int (*vfs_statfs)(struct mount *mp, struct statfs *sbp, 520 struct proc *p); 521 int (*vfs_sync)(struct mount *mp, int waitfor, int stall, 522 struct ucred *cred, struct proc *p); 523 int (*vfs_vget)(struct mount *mp, ino_t ino, 524 struct vnode **vpp); 525 int (*vfs_fhtovp)(struct mount *mp, struct fid *fhp, 526 struct vnode **vpp); 527 int (*vfs_vptofh)(struct vnode *vp, struct fid *fhp); 528 int (*vfs_init)(struct vfsconf *); 529 int (*vfs_sysctl)(int *, u_int, void *, size_t *, void *, 530 size_t, struct proc *); 531 int (*vfs_checkexp)(struct mount *mp, struct mbuf *nam, 532 int *extflagsp, struct ucred **credanonp); 533}; 534 535#define VFS_MOUNT(MP, PATH, DATA, NDP, P) \ 536 (*(MP)->mnt_op->vfs_mount)(MP, PATH, DATA, NDP, P) 537#define VFS_START(MP, FLAGS, P) (*(MP)->mnt_op->vfs_start)(MP, FLAGS, P) 538#define VFS_UNMOUNT(MP, FORCE, P) (*(MP)->mnt_op->vfs_unmount)(MP, FORCE, P) 539#define VFS_ROOT(MP, VPP) (*(MP)->mnt_op->vfs_root)(MP, VPP) 540#define VFS_QUOTACTL(MP,C,U,A,P) (*(MP)->mnt_op->vfs_quotactl)(MP, C, U, A, P) 541#define VFS_STATFS(MP, SBP, P) (*(MP)->mnt_op->vfs_statfs)(MP, SBP, P) 542#define VFS_SYNC(MP, W, S, C, P) (*(MP)->mnt_op->vfs_sync)(MP, W, S, C, P) 543#define VFS_VGET(MP, INO, VPP) (*(MP)->mnt_op->vfs_vget)(MP, INO, VPP) 544#define VFS_FHTOVP(MP, FIDP, VPP) \ 545 (*(MP)->mnt_op->vfs_fhtovp)(MP, FIDP, VPP) 546#define VFS_VPTOFH(VP, FIDP) (*(VP)->v_mount->mnt_op->vfs_vptofh)(VP, FIDP) 547#define VFS_CHECKEXP(MP, NAM, EXFLG, CRED) \ 548 (*(MP)->mnt_op->vfs_checkexp)(MP, NAM, EXFLG, CRED) 549 550/* Set up the filesystem operations for vnodes. */ 551extern const struct vfsops ffs_vfsops; 552extern const struct vfsops mfs_vfsops; 553extern const struct vfsops msdosfs_vfsops; 554extern const struct vfsops nfs_vfsops; 555extern const struct vfsops cd9660_vfsops; 556extern const struct vfsops ext2fs_vfsops; 557extern const struct vfsops ntfs_vfsops; 558extern const struct vfsops udf_vfsops; 559extern const struct vfsops fusefs_vfsops; 560extern const struct vfsops tmpfs_vfsops; 561 562#include <net/radix.h> 563#include <sys/socket.h> /* XXX for AF_MAX */ 564 565/* 566 * Network address lookup element 567 */ 568struct netcred { 569 struct radix_node netc_rnodes[2]; 570 int netc_exflags; 571 int netc_len; /* size of the allocation */ 572 struct ucred netc_anon; 573}; 574 575/* 576 * Network export information 577 */ 578struct netexport { 579 struct netcred ne_defexported; /* Default export */ 580 struct radix_node_head *ne_rtable_inet;/* Individual exports */ 581}; 582 583/* 584 * exported vnode operations 585 */ 586int vfs_busy(struct mount *, int); 587#define VB_READ 0x01 588#define VB_WRITE 0x02 589#define VB_NOWAIT 0x04 /* immediately fail on busy lock */ 590#define VB_WAIT 0x08 /* sleep fail on busy lock */ 591#define VB_DUPOK 0x10 /* permit duplicate mount busying */ 592 593int vfs_isbusy(struct mount *); 594struct mount *vfs_mount_alloc(struct vnode *, struct vfsconf *); 595void vfs_mount_free(struct mount *); 596int vfs_mount_foreach_vnode(struct mount *, int (*func)(struct vnode *, 597 void *), void *); 598void vfs_getnewfsid(struct mount *); 599struct mount *vfs_getvfs(fsid_t *); 600int vfs_mountedon(struct vnode *); 601int vfs_rootmountalloc(char *, char *, struct mount **); 602void vfs_unbusy(struct mount *); 603extern TAILQ_HEAD(mntlist, mount) mountlist; 604int vfs_stall(struct proc *, int); 605void vfs_stall_barrier(void); 606 607 /* process mount export info */ 608int vfs_export(struct mount *, struct netexport *, struct export_args *); 609 /* lookup host in fs export list */ 610struct netcred *vfs_export_lookup(struct mount *, struct netexport *, 611 struct mbuf *); 612int vfs_allocate_syncvnode(struct mount *); 613 614int vfs_syncwait(struct proc *, int); /* sync and wait for complete */ 615void vfs_shutdown(struct proc *); /* unmount and sync file systems */ 616int dounmount(struct mount *, int, struct proc *); 617void vfsinit(void); 618struct vfsconf *vfs_byname(const char *); 619struct vfsconf *vfs_bytypenum(int); 620#else /* _KERNEL */ 621__BEGIN_DECLS 622int fstatfs(int, struct statfs *); 623int getfh(const char *, fhandle_t *); 624int getfsstat(struct statfs *, size_t, int); 625int getmntinfo(struct statfs **, int); 626int mount(const char *, const char *, int, void *); 627int statfs(const char *, struct statfs *); 628int unmount(const char *, int); 629#if __BSD_VISIBLE 630struct stat; 631int fhopen(const fhandle_t *, int); 632int fhstat(const fhandle_t *, struct stat *); 633int fhstatfs(const fhandle_t *, struct statfs *); 634#endif /* __BSD_VISIBLE */ 635__END_DECLS 636#endif /* _KERNEL */ 637#endif /* !_SYS_MOUNT_H_ */ 638