sys/sys/mount.h

   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 1.21 2005/07/26 15:43:35 hmp 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 #include <sys/queue.h>
  50 #ifdef _KERNEL
  51 #include <sys/lock.h>
  52 #endif
  53
  54 struct thread;
  55 struct journal;
  56 struct vop_ops;
  57 struct vop_mountctl_args;
  58
  59 typedef struct fsid { int32_t val[2]; } fsid_t; /* file system id type */
  60
  61 /*
  62  * File identifier.
  63  * These are unique per filesystem on a single machine.
  64  */
  65 #define MAXFIDSZ        16
  66
  67 struct fid {
  68         u_short         fid_len;                /* length of data in bytes */
  69         u_short         fid_reserved;           /* force longword alignment */
  70         char            fid_data[MAXFIDSZ];     /* data (variable length) */
  71 };
  72
  73 /*
  74  * file system statistics
  75  */
  76
  77 #define MFSNAMELEN      16      /* length of fs type name, including null */
  78 #define MNAMELEN        80      /* length of buffer for returned name */
  79
  80 struct statfs {
  81         long    f_spare2;               /* placeholder */
  82         long    f_bsize;                /* fundamental file system block size */
  83         long    f_iosize;               /* optimal transfer block size */
  84         long    f_blocks;               /* total data blocks in file system */
  85         long    f_bfree;                /* free blocks in fs */
  86         long    f_bavail;               /* free blocks avail to non-superuser */
  87         long    f_files;                /* total file nodes in file system */
  88         long    f_ffree;                /* free file nodes in fs */
  89         fsid_t  f_fsid;                 /* file system id */
  90         uid_t   f_owner;                /* user that mounted the filesystem */
  91         int     f_type;                 /* type of filesystem */
  92         int     f_flags;                /* copy of mount exported flags */
  93         long    f_syncwrites;           /* count of sync writes since mount */
  94         long    f_asyncwrites;          /* count of async writes since mount */
  95         char    f_fstypename[MFSNAMELEN]; /* fs type name */
  96         char    f_mntonname[MNAMELEN];  /* directory on which mounted */
  97         long    f_syncreads;            /* count of sync reads since mount */
  98         long    f_asyncreads;           /* count of async reads since mount */
  99         short   f_spares1;              /* unused spare */
 100         char    f_mntfromname[MNAMELEN];/* mounted filesystem */
 101         short   f_spares2;              /* unused spare */
 102         long    f_spare[2];             /* unused spare */
 103 };
 104
 105 #if defined(_KERNEL) || defined(_KERNEL_STRUCTURES)
 106 /*
 107  * Structure per mounted file system.  Each mounted file system has an
 108  * array of operations and an instance record.  The file systems are
 109  * put on a doubly linked list.
 110  *
 111  * NOTE: mnt_nvnodelist and mnt_reservedvnlist.  At the moment vnodes
 112  * are linked into mnt_nvnodelist.  At some point in the near future the
 113  * vnode list will be split into a 'dirty' and 'clean' list. mnt_nvnodelist
 114  * will become the dirty list and mnt_reservedvnlist will become the 'clean'
 115  * list.  Filesystem kld's syncing code should remain compatible since
 116  * they only need to scan the dirty vnode list (nvnodelist -> dirtyvnodelist).
 117  *
 118  * NOTE: mnt_fsmanage structures.  These structures are required by the new
 119  * vnode operations vector abstraction.  Each one contains its own operations
 120  * vector which is registered just like VNODEOP_SET/vnodeopv_desc except it
 121  * is done in the mount code rather then on vfs initialization.  This
 122  * structure is responsible for per-mount management, including vfs threading,
 123  * journaling, and so forth.
 124  *
 125  * NOTE: All VFSs must at least populate mnt_vn_ops or those VOP ops that
 126  * only take namecache pointers will not be able to find their operations
 127  * vector via namecache->nc_mount.
 128  */
 129 TAILQ_HEAD(vnodelst, vnode);
 130 TAILQ_HEAD(journallst, journal);
 131
 132 struct mount {
 133         TAILQ_ENTRY(mount) mnt_list;            /* mount list */
 134         struct vfsops   *mnt_op;                /* operations on fs */
 135         struct vfsconf  *mnt_vfc;               /* configuration info */
 136         struct vnode    *mnt_vnodecovered;      /* vnode we mounted on */
 137         struct vnode    *mnt_syncer;            /* syncer vnode */
 138         struct vnodelst mnt_nvnodelist;         /* list of vnodes this mount */
 139         struct lock     mnt_lock;               /* mount structure lock */
 140         int             mnt_flag;               /* flags shared with user */
 141         int             mnt_kern_flag;          /* kernel only flags */
 142         int             mnt_maxsymlinklen;      /* max size of short symlink */
 143         struct statfs   mnt_stat;               /* cache of filesystem stats */
 144         qaddr_t         mnt_data;               /* private data */
 145         time_t          mnt_time;               /* last time written*/
 146         u_int           mnt_iosize_max;         /* max IO request size */
 147         struct vnodelst mnt_reservedvnlist;     /* (future) dirty vnode list */
 148         int             mnt_nvnodelistsize;     /* # of vnodes on this mount */
 149
 150         /*
 151          * ops vectors have a fixed stacking order.  All primary calls run
 152          * through mnt_vn_ops.  This field is typically assigned to
 153          * mnt_vn_norm_ops.  If journaling has been enabled this field is
 154          * usually assigned to mnt_vn_journal_ops.
 155          */
 156         struct vop_ops  *mnt_vn_use_ops;        /* current ops set */
 157
 158         struct vop_ops  *mnt_vn_coherency_ops;  /* cache coherency ops */
 159         struct vop_ops  *mnt_vn_journal_ops;    /* journaling ops */
 160         struct vop_ops  *mnt_vn_norm_ops;       /* for use by the VFS */
 161         struct vop_ops  *mnt_vn_spec_ops;       /* for use by the VFS */
 162         struct vop_ops  *mnt_vn_fifo_ops;       /* for use by the VFS */
 163         struct namecache *mnt_ncp;              /* NCF_MNTPT ncp */
 164
 165         struct journallst mnt_jlist;            /* list of active journals */
 166 };
 167
 168 #endif /* _KERNEL || _KERNEL_STRUCTURES */
 169
 170 /*
 171  * User specifiable flags.
 172  */
 173 #define MNT_RDONLY      0x00000001      /* read only filesystem */
 174 #define MNT_SYNCHRONOUS 0x00000002      /* file system written synchronously */
 175 #define MNT_NOEXEC      0x00000004      /* can't exec from filesystem */
 176 #define MNT_NOSUID      0x00000008      /* don't honor setuid bits on fs */
 177 #define MNT_NODEV       0x00000010      /* don't interpret special files */
 178 #define MNT_UNION       0x00000020      /* union with underlying filesystem */
 179 #define MNT_ASYNC       0x00000040      /* file system written asynchronously */
 180 #define MNT_SUIDDIR     0x00100000      /* special handling of SUID on dirs */
 181 #define MNT_SOFTDEP     0x00200000      /* soft updates being done */
 182 #define MNT_NOSYMFOLLOW 0x00400000      /* do not follow symlinks */
 183 #define MNT_NOATIME     0x10000000      /* disable update of file access time */
 184 #define MNT_NOCLUSTERR  0x40000000      /* disable cluster read */
 185 #define MNT_NOCLUSTERW  0x80000000      /* disable cluster write */
 186
 187 /*
 188  * NFS export related mount flags.
 189  */
 190 #define MNT_EXRDONLY    0x00000080      /* exported read only */
 191 #define MNT_EXPORTED    0x00000100      /* file system is exported */
 192 #define MNT_DEFEXPORTED 0x00000200      /* exported to the world */
 193 #define MNT_EXPORTANON  0x00000400      /* use anon uid mapping for everyone */
 194 #define MNT_EXKERB      0x00000800      /* exported with Kerberos uid mapping */
 195 #define MNT_EXPUBLIC    0x20000000      /* public export (WebNFS) */
 196
 197 /*
 198  * Flags set by internal operations,
 199  * but visible to the user.
 200  * XXX some of these are not quite right.. (I've never seen the root flag set)
 201  */
 202 #define MNT_LOCAL       0x00001000      /* filesystem is stored locally */
 203 #define MNT_QUOTA       0x00002000      /* quotas are enabled on filesystem */
 204 #define MNT_ROOTFS      0x00004000      /* identifies the root filesystem */
 205 #define MNT_USER        0x00008000      /* mounted by a user */
 206 #define MNT_IGNORE      0x00800000      /* do not show entry in df */
 207
 208 /*
 209  * Mask of flags that are visible to statfs()
 210  * XXX I think that this could now become (~(MNT_CMDFLAGS))
 211  * but the 'mount' program may need changing to handle this.
 212  */
 213 #define MNT_VISFLAGMASK (MNT_RDONLY     | MNT_SYNCHRONOUS | MNT_NOEXEC  | \
 214                         MNT_NOSUID      | MNT_NODEV     | MNT_UNION     | \
 215                         MNT_ASYNC       | MNT_EXRDONLY  | MNT_EXPORTED  | \
 216                         MNT_DEFEXPORTED | MNT_EXPORTANON| MNT_EXKERB    | \
 217                         MNT_LOCAL       | MNT_USER      | MNT_QUOTA     | \
 218                         MNT_ROOTFS      | MNT_NOATIME   | MNT_NOCLUSTERR| \
 219                         MNT_NOCLUSTERW  | MNT_SUIDDIR   | MNT_SOFTDEP   | \
 220                         MNT_IGNORE      | MNT_NOSYMFOLLOW | MNT_EXPUBLIC )
 221 /*
 222  * External filesystem command modifier flags.
 223  * Unmount can use the MNT_FORCE flag.
 224  * XXX These are not STATES and really should be somewhere else.
 225  */
 226 #define MNT_UPDATE      0x00010000      /* not a real mount, just an update */
 227 #define MNT_DELEXPORT   0x00020000      /* delete export host lists */
 228 #define MNT_RELOAD      0x00040000      /* reload filesystem data */
 229 #define MNT_FORCE       0x00080000      /* force unmount or readonly change */
 230 #define MNT_CMDFLAGS    (MNT_UPDATE|MNT_DELEXPORT|MNT_RELOAD|MNT_FORCE)
 231 /*
 232  * Internal filesystem control flags stored in mnt_kern_flag.
 233  *
 234  * MNTK_UNMOUNT locks the mount entry so that name lookup cannot proceed
 235  * past the mount point.  This keeps the subtree stable during mounts
 236  * and unmounts.
 237  *
 238  * MNTK_UNMOUNTF permits filesystems to detect a forced unmount while
 239  * dounmount() is still waiting to lock the mountpoint. This allows
 240  * the filesystem to cancel operations that might otherwise deadlock
 241  * with the unmount attempt (used by NFS).
 242  */
 243 #define MNTK_UNMOUNTF   0x00000001      /* forced unmount in progress */
 244 #define MNTK_UNMOUNT    0x01000000      /* unmount in progress */
 245 #define MNTK_MWAIT      0x02000000      /* waiting for unmount to finish */
 246 #define MNTK_WANTRDWR   0x04000000      /* upgrade to read/write requested */
 247
 248 /*
 249  * mountlist_*() defines
 250  */
 251 #define MNTSCAN_FORWARD         0x0001
 252 #define MNTSCAN_REVERSE         0x0002
 253 #define MNTSCAN_NOBUSY          0x0004
 254
 255 #define MNTINS_FIRST            0x0001
 256 #define MNTINS_LAST             0x0002
 257
 258 /*
 259  * Sysctl CTL_VFS definitions.
 260  *
 261  * Second level identifier specifies which filesystem. Second level
 262  * identifier VFS_VFSCONF returns information about all filesystems.
 263  * Second level identifier VFS_GENERIC is non-terminal.
 264  */
 265 #define VFS_VFSCONF             0       /* get configured filesystems */
 266 #define VFS_GENERIC             0       /* generic filesystem information */
 267 /*
 268  * Third level identifiers for VFS_GENERIC are given below; third
 269  * level identifiers for specific filesystems are given in their
 270  * mount specific header files.
 271  */
 272 #define VFS_MAXTYPENUM  1       /* int: highest defined filesystem type */
 273 #define VFS_CONF        2       /* struct: vfsconf for filesystem given
 274                                    as next argument */
 275
 276 /*
 277  * Flags for various system call interfaces.
 278  *
 279  * waitfor flags to vfs_sync() and getfsstat()
 280  */
 281 #define MNT_WAIT        1       /* synchronously wait for I/O to complete */
 282 #define MNT_NOWAIT      2       /* start all I/O, but do not wait for it */
 283 #define MNT_LAZY        4       /* be lazy and do not necessarily push it all */
 284
 285 /*
 286  * Generic file handle
 287  */
 288 struct fhandle {
 289         fsid_t  fh_fsid;        /* File system id of mount point */
 290         struct  fid fh_fid;     /* File sys specific id */
 291 };
 292 typedef struct fhandle  fhandle_t;
 293
 294 /*
 295  * Export arguments for local filesystem mount calls.
 296  */
 297 struct export_args {
 298         int     ex_flags;               /* export related flags */
 299         uid_t   ex_root;                /* mapping for root uid */
 300         struct  ucred ex_anon;          /* mapping for anonymous user */
 301         struct  sockaddr *ex_addr;      /* net address to which exported */
 302         int     ex_addrlen;             /* and the net address length */
 303         struct  sockaddr *ex_mask;      /* mask of valid bits in saddr */
 304         int     ex_masklen;             /* and the smask length */
 305         char    *ex_indexfile;          /* index file for WebNFS URLs */
 306 };
 307
 308 /*
 309  * Structure holding information for a publicly exported filesystem
 310  * (WebNFS). Currently the specs allow just for one such filesystem.
 311  */
 312 struct nfs_public {
 313         int             np_valid;       /* Do we hold valid information */
 314         fhandle_t       np_handle;      /* Filehandle for pub fs (internal) */
 315         struct mount    *np_mount;      /* Mountpoint of exported fs */
 316         char            *np_index;      /* Index file */
 317 };
 318
 319 /*
 320  * Filesystem configuration information. One of these exists for each
 321  * type of filesystem supported by the kernel. These are searched at
 322  * mount time to identify the requested filesystem.
 323  */
 324 struct vfsconf {
 325         struct  vfsops *vfc_vfsops;     /* filesystem operations vector */
 326         char    vfc_name[MFSNAMELEN];   /* filesystem type name */
 327         int     vfc_typenum;            /* historic filesystem type number */
 328         int     vfc_refcount;           /* number mounted of this type */
 329         int     vfc_flags;              /* permanent flags */
 330         struct  vfsconf *vfc_next;      /* next in list */
 331 };
 332
 333 struct ovfsconf {
 334         void    *vfc_vfsops;
 335         char    vfc_name[32];
 336         int     vfc_index;
 337         int     vfc_refcount;
 338         int     vfc_flags;
 339 };
 340
 341 /*
 342  * NB: these flags refer to IMPLEMENTATION properties, not properties of
 343  * any actual mounts; i.e., it does not make sense to change the flags.
 344  */
 345 #define VFCF_STATIC     0x00010000      /* statically compiled into kernel */
 346 #define VFCF_NETWORK    0x00020000      /* may get data over the network */
 347 #define VFCF_READONLY   0x00040000      /* writes are not implemented */
 348 #define VFCF_SYNTHETIC  0x00080000      /* data does not represent real files */
 349 #define VFCF_LOOPBACK   0x00100000      /* aliases some other mounted FS */
 350 #define VFCF_UNICODE    0x00200000      /* stores file names as Unicode*/
 351
 352 #ifdef _KERNEL
 353
 354 #ifdef MALLOC_DECLARE
 355 MALLOC_DECLARE(M_MOUNT);
 356 #endif
 357 extern int maxvfsconf;          /* highest defined filesystem type */
 358 extern int nfs_mount_type;      /* vfc_typenum for nfs, or -1 */
 359 extern struct vfsconf *vfsconf; /* head of list of filesystem types */
 360
 361 #endif
 362
 363 #if defined(_KERNEL) || defined(_KERNEL_STRUCTURES)
 364
 365 TAILQ_HEAD(mntlist, mount);     /* struct mntlist */
 366
 367 /*
 368  * Operations supported on mounted file system.
 369  */
 370 #ifdef __STDC__
 371 struct nlookupdata;
 372 struct nlookupdata;
 373 struct mbuf;
 374 #endif
 375
 376 typedef int vfs_mount_t(struct mount *mp, char *path, caddr_t data,
 377                                     struct thread *td);
 378 typedef int vfs_start_t(struct mount *mp, int flags, struct thread *td);
 379 typedef int vfs_unmount_t(struct mount *mp, int mntflags,
 380                                     struct thread *td);
 381 typedef int vfs_root_t(struct mount *mp, struct vnode **vpp);
 382 typedef int vfs_quotactl_t(struct mount *mp, int cmds, uid_t uid, caddr_t arg,
 383                                     struct thread *td);
 384 typedef int vfs_statfs_t(struct mount *mp, struct statfs *sbp,
 385                                     struct thread *td);
 386 typedef int vfs_sync_t(struct mount *mp, int waitfor, struct thread *td);
 387 typedef int vfs_vget_t(struct mount *mp, ino_t ino, struct vnode **vpp);
 388 typedef int vfs_fhtovp_t(struct mount *mp, struct fid *fhp,
 389                                     struct vnode **vpp);
 390 typedef int vfs_checkexp_t(struct mount *mp, struct sockaddr *nam,
 391                                     int *extflagsp, struct ucred **credanonp);
 392 typedef int vfs_vptofh_t(struct vnode *vp, struct fid *fhp);
 393 typedef int vfs_init_t(struct vfsconf *);
 394 typedef int vfs_uninit_t(struct vfsconf *);
 395 typedef int vfs_extattrctl_t(struct mount *mp, int cmd,const char *attrname,
 396                     caddr_t arg, struct thread *td);
 397
 398 struct vfsops {
 399         vfs_mount_t     *vfs_mount;
 400         vfs_start_t     *vfs_start;
 401         vfs_unmount_t   *vfs_unmount;
 402         vfs_root_t      *vfs_root;
 403         vfs_quotactl_t  *vfs_quotactl;
 404         vfs_statfs_t    *vfs_statfs;
 405         vfs_sync_t      *vfs_sync;
 406         vfs_vget_t      *vfs_vget;
 407         vfs_fhtovp_t    *vfs_fhtovp;
 408         vfs_checkexp_t  *vfs_checkexp;
 409         vfs_vptofh_t    *vfs_vptofh;
 410         vfs_init_t      *vfs_init;
 411         vfs_uninit_t    *vfs_uninit;
 412         vfs_extattrctl_t        *vfs_extattrctl;
 413 };
 414
 415 #define VFS_MOUNT(MP, PATH, DATA, P) \
 416         (*(MP)->mnt_op->vfs_mount)(MP, PATH, DATA, P)
 417 #define VFS_START(MP, FLAGS, P)   (*(MP)->mnt_op->vfs_start)(MP, FLAGS, P)
 418 #define VFS_UNMOUNT(MP, FORCE, P) (*(MP)->mnt_op->vfs_unmount)(MP, FORCE, P)
 419 #define VFS_ROOT(MP, VPP)         (*(MP)->mnt_op->vfs_root)(MP, VPP)
 420 #define VFS_QUOTACTL(MP,C,U,A,P)  (*(MP)->mnt_op->vfs_quotactl)(MP, C, U, A, P)
 421 #define VFS_STATFS(MP, SBP, P)    (*(MP)->mnt_op->vfs_statfs)(MP, SBP, P)
 422 #define VFS_SYNC(MP, WAIT, P)     (*(MP)->mnt_op->vfs_sync)(MP, WAIT, P)
 423 #define VFS_VGET(MP, INO, VPP)    (*(MP)->mnt_op->vfs_vget)(MP, INO, VPP)
 424 #define VFS_FHTOVP(MP, FIDP, VPP) \
 425         (*(MP)->mnt_op->vfs_fhtovp)(MP, FIDP, VPP)
 426 #define VFS_VPTOFH(VP, FIDP)      (*(VP)->v_mount->mnt_op->vfs_vptofh)(VP, FIDP)
 427 #define VFS_CHECKEXP(MP, NAM, EXFLG, CRED) \
 428         (*(MP)->mnt_op->vfs_checkexp)(MP, NAM, EXFLG, CRED)
 429 #define VFS_EXTATTRCTL(MP, C, N, A, P) \
 430         (*(MP)->mnt_op->vfs_extattrctl)(MP, C, N, A, P)
 431
 432 #endif
 433
 434 #ifdef _KERNEL
 435
 436 #include <sys/module.h>
 437
 438 #define VFS_SET(vfsops, fsname, flags) \
 439         static struct vfsconf fsname ## _vfsconf = {            \
 440                 &vfsops,                                        \
 441                 #fsname,                                        \
 442                 -1,                                             \
 443                 0,                                              \
 444                 flags,                                          \
 445                 NULL                                            \
 446         };                                                      \
 447         static moduledata_t fsname ## _mod = {                  \
 448                 #fsname,                                        \
 449                 vfs_modevent,                                   \
 450                 & fsname ## _vfsconf                            \
 451         };                                                      \
 452         DECLARE_MODULE(fsname, fsname ## _mod, SI_SUB_VFS, SI_ORDER_MIDDLE)
 453
 454 #endif
 455
 456 #if defined(_KERNEL) || defined(_KERNEL_STRUCTURES)
 457
 458 #include <net/radix.h>
 459
 460 #define AF_MAX          33      /* XXX */
 461
 462 /*
 463  * Network address lookup element
 464  */
 465 struct netcred {
 466         struct  radix_node netc_rnodes[2];
 467         int     netc_exflags;
 468         struct  ucred netc_anon;
 469 };
 470
 471 /*
 472  * Network export information
 473  */
 474 struct netexport {
 475         struct  netcred ne_defexported;               /* Default export */
 476         struct  radix_node_head *ne_rtable[AF_MAX+1]; /* Individual exports */
 477 };
 478
 479 #endif
 480
 481 #ifdef _KERNEL
 482
 483 extern  char *mountrootfsname;
 484
 485 /*
 486  * exported vnode operations
 487  */
 488 int     dounmount (struct mount *, int, struct thread *);
 489 int     vfs_setpublicfs                     /* set publicly exported fs */
 490           (struct mount *, struct netexport *, struct export_args *);
 491 int     vfs_lock (struct mount *);         /* lock a vfs */
 492 void    vfs_msync (struct mount *, int);
 493 void    vfs_unlock (struct mount *);       /* unlock a vfs */
 494 int     vfs_busy (struct mount *, int, struct thread *);
 495 void    vfs_bufstats(void);
 496 int     vfs_export                          /* process mount export info */
 497           (struct mount *, struct netexport *, struct export_args *);
 498 struct  netcred *vfs_export_lookup          /* lookup host in fs export list */
 499           (struct mount *, struct netexport *, struct sockaddr *);
 500 int     vfs_allocate_syncvnode (struct mount *);
 501 void    vfs_getnewfsid (struct mount *);
 502 dev_t   vfs_getrootfsid (struct mount *);
 503 struct  mount *vfs_getvfs (fsid_t *);      /* return vfs given fsid */
 504 int     vfs_modevent (module_t, int, void *);
 505 int     vfs_mountedon (struct vnode *);    /* is a vfs mounted on vp */
 506 int     vfs_rootmountalloc (char *, char *, struct mount **);
 507 void    vfs_unbusy (struct mount *, struct thread *);
 508 void    vfs_unmountall (void);
 509 int     vfs_register (struct vfsconf *);
 510 int     vfs_unregister (struct vfsconf *);
 511 extern  struct nfs_public nfs_pub;
 512
 513 /*
 514  * Declarations for these vfs default operations are located in
 515  * kern/vfs_default.c, they should be used instead of making "dummy"
 516  * functions or casting entries in the VFS op table to "enopnotsupp()".
 517  */
 518 vfs_start_t     vfs_stdstart;
 519 vfs_mount_t     vfs_stdmount;
 520 vfs_unmount_t   vfs_stdunmount;
 521 vfs_root_t      vfs_stdroot;
 522 vfs_quotactl_t  vfs_stdquotactl;
 523 vfs_statfs_t    vfs_stdstatfs;
 524 vfs_sync_t      vfs_stdsync;
 525 vfs_sync_t      vfs_stdnosync;
 526 vfs_vget_t      vfs_stdvget;
 527 vfs_fhtovp_t    vfs_stdfhtovp;
 528 vfs_checkexp_t  vfs_stdcheckexp;
 529 vfs_vptofh_t    vfs_stdvptofh;
 530 vfs_init_t      vfs_stdinit;
 531 vfs_uninit_t    vfs_stduninit;
 532 vfs_extattrctl_t        vfs_stdextattrctl;
 533
 534 int     journal_mountctl(struct vop_mountctl_args *ap);
 535 void    journal_remove_all_journals(struct mount *mp, int flags);
 536
 537 void    mountlist_insert(struct mount *, int);
 538 int     mountlist_interlock(int (*callback)(struct mount *), struct mount *);
 539 struct mount *mountlist_boot_getfirst(void);
 540 void    mountlist_remove(struct mount *mp);
 541 int     mountlist_scan(int (*callback)(struct mount *, void *), void *, int);
 542
 543 #else /* !_KERNEL */
 544
 545 #include <sys/cdefs.h>
 546
 547 __BEGIN_DECLS
 548 int     fstatfs (int, struct statfs *);
 549 int     getfh (const char *, fhandle_t *);
 550 int     getfsstat (struct statfs *, long, int);
 551 int     getmntinfo (struct statfs **, int);
 552 int     mount (const char *, const char *, int, void *);
 553 int     statfs (const char *, struct statfs *);
 554 int     unmount (const char *, int);
 555 int     fhopen (const struct fhandle *, int);
 556 int     fhstat (const struct fhandle *, struct stat *);
 557 int     fhstatfs (const struct fhandle *, struct statfs *);
 558
 559 /* C library stuff */
 560 void    endvfsent (void);
 561 struct  ovfsconf *getvfsbyname (const char *);
 562 struct  ovfsconf *getvfsbytype (int);
 563 struct  ovfsconf *getvfsent (void);
 564 #define getvfsbyname    new_getvfsbyname
 565 int     new_getvfsbyname (const char *, struct vfsconf *);
 566 void    setvfsent (int);
 567 int     vfsisloadable (const char *);
 568 int     vfsload (const char *);
 569 __END_DECLS
 570
 571 #endif /* _KERNEL */
 572
 573 #endif /* !_SYS_MOUNT_H_ */
 574