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 1.47 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 #ifndef _SYS_THREAD_H_
  63 #include <sys/thread.h>
  64 #endif
  65 #endif
  66
  67 struct thread;
  68 struct journal;
  69 struct vop_ops;
  70 struct vop_mountctl_args;
  71 struct statvfs;
  72
  73 typedef struct fsid { int32_t val[2]; } fsid_t; /* file system id type */
  74
  75 /*
  76  * File identifier.  These are unique per filesystem on a single machine.
  77  *
  78  * fix_ext is also used by HAMMER.
  79  */
  80 #define MAXFIDSZ        16
  81
  82 struct fid {
  83         u_short         fid_len;                /* length of data in bytes */
  84         u_short         fid_ext;                /* extended data           */
  85         char            fid_data[MAXFIDSZ];     /* data (variable length) */
  86 };
  87
  88 /*
  89  * file system statistics
  90  */
  91
  92 #define MFSNAMELEN      16      /* length of fs type name, including null */
  93 #define MNAMELEN        80      /* length of buffer for returned name */
  94
  95 struct statfs {
  96         long    f_spare2;               /* placeholder */
  97         long    f_bsize;                /* fundamental file system block size */
  98         long    f_iosize;               /* optimal transfer block size */
  99         long    f_blocks;               /* total data blocks in file system */
 100         long    f_bfree;                /* free blocks in fs */
 101         long    f_bavail;               /* free blocks avail to non-superuser */
 102         long    f_files;                /* total file nodes in file system */
 103         long    f_ffree;                /* free file nodes in fs */
 104         fsid_t  f_fsid;                 /* file system id */
 105         uid_t   f_owner;                /* user that mounted the filesystem */
 106         int     f_type;                 /* type of filesystem */
 107         int     f_flags;                /* copy of mount exported flags */
 108         long    f_syncwrites;           /* count of sync writes since mount */
 109         long    f_asyncwrites;          /* count of async writes since mount */
 110         char    f_fstypename[MFSNAMELEN]; /* fs type name */
 111         char    f_mntonname[MNAMELEN];  /* directory on which mounted */
 112         long    f_syncreads;            /* count of sync reads since mount */
 113         long    f_asyncreads;           /* count of async reads since mount */
 114         short   f_spares1;              /* unused spare */
 115         char    f_mntfromname[MNAMELEN];/* mounted filesystem */
 116         short   f_spares2;              /* unused spare */
 117         long    f_spare[2];             /* unused spare */
 118 };
 119
 120 #if defined(_KERNEL) || defined(_KERNEL_STRUCTURES)
 121
 122 /*
 123  * bio_ops are associated with the mount structure and used in conjuction
 124  * with the b_dep field in a buffer.  Currently softupdates and HAMMER
 125  * utilize this field.
 126  */
 127 struct buf;
 128
 129 struct bio_ops {
 130         TAILQ_ENTRY(bio_ops) entry;
 131         void    (*io_start) (struct buf *);
 132         void    (*io_complete) (struct buf *);
 133         void    (*io_deallocate) (struct buf *);
 134         int     (*io_fsync) (struct vnode *);
 135         int     (*io_sync) (struct mount *);
 136         void    (*io_movedeps) (struct buf *, struct buf *);
 137         int     (*io_countdeps) (struct buf *, int);
 138         int     (*io_checkread) (struct buf *);
 139         int     (*io_checkwrite) (struct buf *);
 140 };
 141
 142 /*
 143  * Structure per mounted file system.  Each mounted file system has an
 144  * array of operations and an instance record.  The file systems are
 145  * put on a doubly linked list.
 146  *
 147  * NOTE: mnt_nvnodelist and mnt_reservedvnlist.  At the moment vnodes
 148  * are linked into mnt_nvnodelist.  At some point in the near future the
 149  * vnode list will be split into a 'dirty' and 'clean' list. mnt_nvnodelist
 150  * will become the dirty list and mnt_reservedvnlist will become the 'clean'
 151  * list.  Filesystem kld's syncing code should remain compatible since
 152  * they only need to scan the dirty vnode list (nvnodelist -> dirtyvnodelist).
 153  *
 154  * NOTE: All VFSs must at least populate mnt_vn_ops or those VOP ops that
 155  * only take namecache pointers will not be able to find their operations
 156  * vector via namecache->nc_mount.
 157  *
 158  * MPSAFE NOTES: mnt_lock interlocks mounting and unmounting operations.
 159  *
 160  *               mnt_token interlocks operations which adjust the mount
 161  *               structure and will also be held through VFS operations
 162  *               for VFSes not flagged MPSAFE.
 163  */
 164 TAILQ_HEAD(vnodelst, vnode);
 165 TAILQ_HEAD(journallst, journal);
 166
 167 struct mount {
 168         TAILQ_ENTRY(mount) mnt_list;            /* mount list */
 169         struct vfsops   *mnt_op;                /* operations on fs */
 170         struct vfsconf  *mnt_vfc;               /* configuration info */
 171         long            mnt_namecache_gen;      /* ++ to clear negative hits */
 172         struct vnode    *mnt_syncer;            /* syncer vnode */
 173         struct vnodelst mnt_nvnodelist;         /* list of vnodes this mount */
 174         struct lock     mnt_lock;               /* mount structure lock */
 175         int             mnt_flag;               /* flags shared with user */
 176         int             mnt_kern_flag;          /* kernel only flags */
 177         int             mnt_maxsymlinklen;      /* max size of short symlink */
 178         struct statfs   mnt_stat;               /* cache of filesystem stats */
 179         struct statvfs  mnt_vstat;              /* extended stats */
 180         qaddr_t         mnt_data;               /* private data */
 181         time_t          mnt_time;               /* last time written*/
 182         u_int           mnt_iosize_max;         /* max IO request size */
 183         struct vnodelst mnt_reservedvnlist;     /* (future) dirty vnode list */
 184         int             mnt_nvnodelistsize;     /* # of vnodes on this mount */
 185
 186         /*
 187          * ops vectors have a fixed stacking order.  All primary calls run
 188          * through mnt_vn_ops.  This field is typically assigned to
 189          * mnt_vn_norm_ops.  If journaling has been enabled this field is
 190          * usually assigned to mnt_vn_journal_ops.
 191          */
 192         struct vop_ops  *mnt_vn_use_ops;        /* current ops set */
 193
 194         struct vop_ops  *mnt_vn_coherency_ops;  /* cache coherency ops */
 195         struct vop_ops  *mnt_vn_journal_ops;    /* journaling ops */
 196         struct vop_ops  *mnt_vn_norm_ops;       /* for use by the VFS */
 197         struct vop_ops  *mnt_vn_spec_ops;       /* for use by the VFS */
 198         struct vop_ops  *mnt_vn_fifo_ops;       /* for use by the VFS */
 199         struct nchandle mnt_ncmountpt;          /* mount point */
 200         struct nchandle mnt_ncmounton;          /* mounted on */
 201         int             mnt_refs;               /* nchandle references */
 202         struct lwkt_token mnt_token;            /* token lock if not MPSAFE */
 203         struct journallst mnt_jlist;            /* list of active journals */
 204         u_int8_t        *mnt_jbitmap;           /* streamid bitmap */
 205         int16_t         mnt_streamid;           /* last streamid */
 206
 207         struct bio_ops  *mnt_bioops;            /* BIO ops (hammer, softupd) */
 208 };
 209
 210 #endif /* _KERNEL || _KERNEL_STRUCTURES */
 211
 212 /*
 213  * User specifiable flags.
 214  */
 215 #define MNT_RDONLY      0x00000001      /* read only filesystem */
 216 #define MNT_SYNCHRONOUS 0x00000002      /* file system written synchronously */
 217 #define MNT_NOEXEC      0x00000004      /* can't exec from filesystem */
 218 #define MNT_NOSUID      0x00000008      /* don't honor setuid bits on fs */
 219 #define MNT_NODEV       0x00000010      /* don't interpret special files */
 220 #define MNT_UNION       0x00000020      /* union with underlying filesystem */
 221 #define MNT_ASYNC       0x00000040      /* file system written asynchronously */
 222 #define MNT_SUIDDIR     0x00100000      /* special handling of SUID on dirs */
 223 #define MNT_SOFTDEP     0x00200000      /* soft updates being done */
 224 #define MNT_NOSYMFOLLOW 0x00400000      /* do not follow symlinks */
 225 #define MNT_NOATIME     0x10000000      /* disable update of file access time */
 226 #define MNT_NOCLUSTERR  0x40000000      /* disable cluster read */
 227 #define MNT_NOCLUSTERW  0x80000000      /* disable cluster write */
 228
 229 /*
 230  * NFS export related mount flags.
 231  */
 232 #define MNT_EXRDONLY    0x00000080      /* exported read only */
 233 #define MNT_EXPORTED    0x00000100      /* file system is exported */
 234 #define MNT_DEFEXPORTED 0x00000200      /* exported to the world */
 235 #define MNT_EXPORTANON  0x00000400      /* use anon uid mapping for everyone */
 236 #define MNT_EXKERB      0x00000800      /* exported with Kerberos uid mapping */
 237 #define MNT_EXPUBLIC    0x20000000      /* public export (WebNFS) */
 238
 239 /*
 240  * Flags set by internal operations,
 241  * but visible to the user.
 242  * XXX some of these are not quite right.. (I've never seen the root flag set)
 243  */
 244 #define MNT_LOCAL       0x00001000      /* filesystem is stored locally */
 245 #define MNT_QUOTA       0x00002000      /* quotas are enabled on filesystem */
 246 #define MNT_ROOTFS      0x00004000      /* identifies the root filesystem */
 247 #define MNT_USER        0x00008000      /* mounted by a user */
 248 #define MNT_IGNORE      0x00800000      /* do not show entry in df */
 249
 250 /*
 251  * Mask of flags that are visible to statfs()
 252  * XXX I think that this could now become (~(MNT_CMDFLAGS))
 253  * but the 'mount' program may need changing to handle this.
 254  */
 255 #define MNT_VISFLAGMASK (MNT_RDONLY     | MNT_SYNCHRONOUS | MNT_NOEXEC  | \
 256                         MNT_NOSUID      | MNT_NODEV     | MNT_UNION     | \
 257                         MNT_ASYNC       | MNT_EXRDONLY  | MNT_EXPORTED  | \
 258                         MNT_DEFEXPORTED | MNT_EXPORTANON| MNT_EXKERB    | \
 259                         MNT_LOCAL       | MNT_USER      | MNT_QUOTA     | \
 260                         MNT_ROOTFS      | MNT_NOATIME   | MNT_NOCLUSTERR| \
 261                         MNT_NOCLUSTERW  | MNT_SUIDDIR   | MNT_SOFTDEP   | \
 262                         MNT_IGNORE      | MNT_NOSYMFOLLOW | MNT_EXPUBLIC )
 263 /*
 264  * External filesystem command modifier flags.
 265  * Unmount can use the MNT_FORCE flag.
 266  * XXX These are not STATES and really should be somewhere else.
 267  */
 268 #define MNT_UPDATE      0x00010000      /* not a real mount, just an update */
 269 #define MNT_DELEXPORT   0x00020000      /* delete export host lists */
 270 #define MNT_RELOAD      0x00040000      /* reload filesystem data */
 271 #define MNT_FORCE       0x00080000      /* force unmount or readonly change */
 272 #define MNT_CMDFLAGS    (MNT_UPDATE|MNT_DELEXPORT|MNT_RELOAD|MNT_FORCE)
 273 /*
 274  * Internal filesystem control flags stored in mnt_kern_flag.
 275  *
 276  * MNTK_UNMOUNT locks the mount entry so that name lookup cannot proceed
 277  * past the mount point.  This keeps the subtree stable during mounts
 278  * and unmounts.
 279  *
 280  * MNTK_UNMOUNTF permits filesystems to detect a forced unmount while
 281  * dounmount() is still waiting to lock the mountpoint. This allows
 282  * the filesystem to cancel operations that might otherwise deadlock
 283  * with the unmount attempt (used by NFS).
 284  *
 285  * MNTK_NOSTKMNT prevents mounting another filesystem inside the flagged one.
 286  */
 287 #define MNTK_UNMOUNTF   0x00000001      /* forced unmount in progress */
 288 #define MNTK_MPSAFE     0x00010000      /* call vops without mnt_token lock */
 289 #define MNTK_RD_MPSAFE  0x00020000      /* vop_read is MPSAFE */
 290 #define MNTK_WR_MPSAFE  0x00040000      /* vop_write is MPSAFE */
 291 #define MNTK_GA_MPSAFE  0x00080000      /* vop_getattr is MPSAFE */
 292 #define MNTK_IN_MPSAFE  0x00100000      /* vop_inactive is MPSAFE */
 293 #define MNTK_SG_MPSAFE  0x00200000      /* vop_strategy is MPSAFE */
 294 #define MNTK_NCALIASED  0x00800000      /* namecached aliased */
 295 #define MNTK_UNMOUNT    0x01000000      /* unmount in progress */
 296 #define MNTK_MWAIT      0x02000000      /* waiting for unmount to finish */
 297 #define MNTK_WANTRDWR   0x04000000      /* upgrade to read/write requested */
 298 #define MNTK_FSMID      0x08000000      /* getattr supports FSMIDs */
 299 #define MNTK_NOSTKMNT   0x10000000      /* no stacked mount point allowed */
 300
 301 /*
 302  * mountlist_*() defines
 303  */
 304 #define MNTSCAN_FORWARD         0x0001
 305 #define MNTSCAN_REVERSE         0x0002
 306 #define MNTSCAN_NOBUSY          0x0004
 307
 308 #define MNTINS_FIRST            0x0001
 309 #define MNTINS_LAST             0x0002
 310
 311 /*
 312  * Sysctl CTL_VFS definitions.
 313  *
 314  * Second level identifier specifies which filesystem. Second level
 315  * identifier VFS_VFSCONF returns information about all filesystems.
 316  * Second level identifier VFS_GENERIC is non-terminal.
 317  */
 318 #define VFS_VFSCONF             0       /* get configured filesystems */
 319 #define VFS_GENERIC             0       /* generic filesystem information */
 320 /*
 321  * Third level identifiers for VFS_GENERIC are given below; third
 322  * level identifiers for specific filesystems are given in their
 323  * mount specific header files.
 324  */
 325 #define VFS_MAXTYPENUM  1       /* int: highest defined filesystem type */
 326 #define VFS_CONF        2       /* struct: vfsconf for filesystem given
 327                                    as next argument */
 328
 329 /*
 330  * VFS MPLOCK helper.
 331  */
 332 #define VFS_MPLOCK_DECLARE      struct lwkt_tokref xlock; int xlock_mpsafe
 333
 334 #define VFS_MPLOCK1(mp)         VFS_MPLOCK_FLAG(mp, MNTK_MPSAFE)
 335
 336 #define VFS_MPLOCK2(mp)                                                 \
 337                 do {                                                    \
 338                         if (xlock_mpsafe) {                             \
 339                                 get_mplock();   /* TEMPORARY */         \
 340                                 lwkt_gettoken(&xlock, &mp->mnt_token);  \
 341                                 xlock_mpsafe = 0;                       \
 342                         }                                               \
 343                 } while(0)
 344
 345 #define VFS_MPLOCK_FLAG(mp, flag)                                       \
 346                 do {                                                    \
 347                         if (mp->mnt_kern_flag & flag) {                 \
 348                                 xlock_mpsafe = 1;                       \
 349                         } else {                                        \
 350                                 get_mplock();   /* TEMPORARY */         \
 351                                 lwkt_gettoken(&xlock, &mp->mnt_token);  \
 352                                 xlock_mpsafe = 0;                       \
 353                         }                                               \
 354                 } while(0)
 355
 356 #define VFS_MPUNLOCK(mp)                                                \
 357                 do {                                                    \
 358                         if (xlock_mpsafe == 0) {                        \
 359                                 lwkt_reltoken(&xlock);                  \
 360                                 rel_mplock();   /* TEMPORARY */         \
 361                         }                                               \
 362                 } while(0)
 363
 364 /*
 365  * Flags for various system call interfaces.
 366  *
 367  * waitfor flags to vfs_sync() and getfsstat()
 368  */
 369 #define MNT_WAIT        1       /* synchronously wait for I/O to complete */
 370 #define MNT_NOWAIT      2       /* start all I/O, but do not wait for it */
 371 #define MNT_LAZY        4       /* be lazy and do not necessarily push it all */
 372
 373 #define VOP_FSYNC_SYSCALL       0x0001  /* from system call */
 374
 375 /*
 376  * Generic file handle
 377  */
 378 struct fhandle {
 379         fsid_t  fh_fsid;        /* File system id of mount point */
 380         struct  fid fh_fid;     /* File sys specific id */
 381 };
 382 typedef struct fhandle  fhandle_t;
 383
 384 /*
 385  * Export arguments for local filesystem mount calls.
 386  */
 387 struct export_args {
 388         int     ex_flags;               /* export related flags */
 389         uid_t   ex_root;                /* mapping for root uid */
 390         struct  ucred ex_anon;          /* mapping for anonymous user */
 391         struct  sockaddr *ex_addr;      /* net address to which exported */
 392         int     ex_addrlen;             /* and the net address length */
 393         struct  sockaddr *ex_mask;      /* mask of valid bits in saddr */
 394         int     ex_masklen;             /* and the smask length */
 395         char    *ex_indexfile;          /* index file for WebNFS URLs */
 396 };
 397
 398 /*
 399  * Structure holding information for a publicly exported filesystem
 400  * (WebNFS). Currently the specs allow just for one such filesystem.
 401  */
 402 struct nfs_public {
 403         int             np_valid;       /* Do we hold valid information */
 404         fhandle_t       np_handle;      /* Filehandle for pub fs (internal) */
 405         struct mount    *np_mount;      /* Mountpoint of exported fs */
 406         char            *np_index;      /* Index file */
 407 };
 408
 409 /*
 410  * Filesystem configuration information. One of these exists for each
 411  * type of filesystem supported by the kernel. These are searched at
 412  * mount time to identify the requested filesystem.
 413  */
 414 #ifndef _SYS_QUEUE_H_
 415 #include <sys/queue.h>
 416 #endif
 417 struct vfsconf {
 418         struct  vfsops *vfc_vfsops;     /* filesystem operations vector */
 419         char    vfc_name[MFSNAMELEN];   /* filesystem type name */
 420         int     vfc_typenum;            /* historic filesystem type number */
 421         int     vfc_refcount;           /* number mounted of this type */
 422         int     vfc_flags;              /* permanent flags */
 423         STAILQ_ENTRY(vfsconf) vfc_next; /* next in list */
 424 };
 425
 426 struct ovfsconf {
 427         void    *vfc_vfsops;
 428         char    vfc_name[32];
 429         int     vfc_index;
 430         int     vfc_refcount;
 431         int     vfc_flags;
 432 };
 433
 434 /*
 435  * NB: these flags refer to IMPLEMENTATION properties, not properties of
 436  * any actual mounts; i.e., it does not make sense to change the flags.
 437  */
 438 #define VFCF_STATIC     0x00010000      /* statically compiled into kernel */
 439 #define VFCF_NETWORK    0x00020000      /* may get data over the network */
 440 #define VFCF_READONLY   0x00040000      /* writes are not implemented */
 441 #define VFCF_SYNTHETIC  0x00080000      /* data does not represent real files */
 442 #define VFCF_LOOPBACK   0x00100000      /* aliases some other mounted FS */
 443 #define VFCF_UNICODE    0x00200000      /* stores file names as Unicode*/
 444
 445 #ifdef _KERNEL
 446
 447 #ifdef MALLOC_DECLARE
 448 MALLOC_DECLARE(M_MOUNT);
 449 #endif
 450 extern int nfs_mount_type;      /* vfc_typenum for nfs, or -1 */
 451
 452 struct vfsconf *vfsconf_find_by_name(const char *);
 453 struct vfsconf *vfsconf_find_by_typenum(int);
 454 int vfsconf_get_maxtypenum(void);
 455 int vfsconf_each(int (*)(struct vfsconf *, void *), void *);
 456
 457 #endif
 458
 459 #if defined(_KERNEL) || defined(_KERNEL_STRUCTURES)
 460
 461 TAILQ_HEAD(mntlist, mount);     /* struct mntlist */
 462
 463 /*
 464  * Operations supported on mounted file system.
 465  */
 466 #ifdef __STDC__
 467 struct nlookupdata;
 468 struct nlookupdata;
 469 struct mbuf;
 470 #endif
 471
 472 typedef int vfs_mount_t(struct mount *mp, char *path, caddr_t data,
 473                                     struct ucred *cred);
 474 typedef int vfs_start_t(struct mount *mp, int flags);
 475 typedef int vfs_unmount_t(struct mount *mp, int mntflags);
 476 typedef int vfs_root_t(struct mount *mp, struct vnode **vpp);
 477 typedef int vfs_quotactl_t(struct mount *mp, int cmds, uid_t uid, caddr_t arg,
 478                                     struct ucred *cred);
 479 typedef int vfs_statfs_t(struct mount *mp, struct statfs *sbp,
 480                                     struct ucred *cred);
 481 typedef int vfs_statvfs_t(struct mount *mp, struct statvfs *sbp,
 482                                     struct ucred *cred);
 483 typedef int vfs_sync_t(struct mount *mp, int waitfor);
 484 typedef int vfs_vget_t(struct mount *mp, struct vnode *dvp,
 485                                     ino_t ino, struct vnode **vpp);
 486 typedef int vfs_fhtovp_t(struct mount *mp, struct vnode *rootvp,
 487                                     struct fid *fhp, struct vnode **vpp);
 488 typedef int vfs_checkexp_t(struct mount *mp, struct sockaddr *nam,
 489                                     int *extflagsp, struct ucred **credanonp);
 490 typedef int vfs_vptofh_t(struct vnode *vp, struct fid *fhp);
 491 typedef int vfs_init_t(struct vfsconf *);
 492 typedef int vfs_uninit_t(struct vfsconf *);
 493 typedef int vfs_extattrctl_t(struct mount *mp, int cmd,const char *attrname,
 494                     caddr_t arg, struct ucred *cred);
 495
 496 int vfs_mount(struct mount *mp, char *path, caddr_t data, struct ucred *cred);
 497 int vfs_start(struct mount *mp, int flags);
 498 int vfs_unmount(struct mount *mp, int mntflags);
 499 int vfs_root(struct mount *mp, struct vnode **vpp);
 500 int vfs_quotactl(struct mount *mp, int cmds, uid_t uid, caddr_t arg,
 501                                 struct ucred *cred);
 502 int vfs_statfs(struct mount *mp, struct statfs *sbp, struct ucred *cred);
 503 int vfs_statvfs(struct mount *mp, struct statvfs *sbp, struct ucred *cred);
 504 int vfs_sync(struct mount *mp, int waitfor);
 505 int vfs_vget(struct mount *mp, struct vnode *dvp,
 506                                 ino_t ino, struct vnode **vpp);
 507 int vfs_fhtovp(struct mount *mp, struct vnode *rootvp,
 508                                 struct fid *fhp, struct vnode **vpp);
 509 int vfs_checkexp(struct mount *mp, struct sockaddr *nam,
 510                                 int *extflagsp, struct ucred **credanonp);
 511 int vfs_vptofh(struct vnode *vp, struct fid *fhp);
 512 int vfs_init(struct vfsconf *vfc);
 513 int vfs_uninit(struct vfsconf *vfc, struct vfsconf *vfsp);
 514 int vfs_extattrctl(struct mount *mp, int cmd,const char *attrname,
 515                                 caddr_t arg, struct ucred *cred);
 516
 517
 518 struct vfsops {
 519         vfs_mount_t     *vfs_mount;
 520         vfs_start_t     *vfs_start;
 521         vfs_unmount_t   *vfs_unmount;
 522         vfs_root_t      *vfs_root;
 523         vfs_quotactl_t  *vfs_quotactl;
 524         vfs_statfs_t    *vfs_statfs;
 525         vfs_sync_t      *vfs_sync;
 526         vfs_vget_t      *vfs_vget;
 527         vfs_fhtovp_t    *vfs_fhtovp;
 528         vfs_checkexp_t  *vfs_checkexp;
 529         vfs_vptofh_t    *vfs_vptofh;
 530         vfs_init_t      *vfs_init;
 531         vfs_uninit_t    *vfs_uninit;
 532         vfs_extattrctl_t *vfs_extattrctl;
 533         vfs_statvfs_t   *vfs_statvfs;
 534 };
 535
 536 #define VFS_MOUNT(MP, PATH, DATA, CRED)         \
 537         vfs_mount(MP, PATH, DATA, CRED)
 538 #define VFS_START(MP, FLAGS)                    \
 539         vfs_start(MP, FLAGS)
 540 #define VFS_UNMOUNT(MP, FORCE)                  \
 541         vfs_unmount(MP, FORCE)
 542 #define VFS_ROOT(MP, VPP)                       \
 543         vfs_root(MP, VPP)
 544 #define VFS_QUOTACTL(MP, C, U, A, CRED)         \
 545         vfs_quotactl(MP, C, U, A, CRED)
 546 #define VFS_STATFS(MP, SBP, CRED)               \
 547         vfs_statfs(MP, SBP, CRED)
 548 #define VFS_STATVFS(MP, SBP, CRED)              \
 549         vfs_statvfs(MP, SBP, CRED)
 550 #define VFS_SYNC(MP, WAIT)                      \
 551         vfs_sync(MP, WAIT)
 552 #define VFS_VGET(MP, DVP, INO, VPP)             \
 553         vfs_vget(MP, DVP, INO, VPP)
 554 #define VFS_FHTOVP(MP, ROOTVP, FIDP, VPP)       \
 555         vfs_fhtovp(MP, ROOTVP, FIDP, VPP)
 556 #define VFS_VPTOFH(VP, FIDP)                    \
 557         vfs_vptofh(VP, FIDP)
 558 #define VFS_CHECKEXP(MP, NAM, EXFLG, CRED)      \
 559         vfs_checkexp(MP, NAM, EXFLG, CRED)
 560 #define VFS_EXTATTRCTL(MP, C, N, A, CRED)       \
 561         vfs_extattrctl(MP, C, N, A, CRED)
 562
 563 #endif
 564
 565 #ifdef _KERNEL
 566
 567 #include <sys/module.h>
 568
 569 #define VFS_SET(vfsops, fsname, flags) \
 570         static struct vfsconf fsname ## _vfsconf = {            \
 571                 &vfsops,                                        \
 572                 #fsname,                                        \
 573                 -1,                                             \
 574                 0,                                              \
 575                 flags,                                          \
 576                 { NULL },                                       \
 577         };                                                      \
 578         static moduledata_t fsname ## _mod = {                  \
 579                 #fsname,                                        \
 580                 vfs_modevent,                                   \
 581                 & fsname ## _vfsconf                            \
 582         };                                                      \
 583         DECLARE_MODULE(fsname, fsname ## _mod, SI_SUB_VFS, SI_ORDER_MIDDLE)
 584
 585 #endif
 586
 587 #if defined(_KERNEL) || defined(_KERNEL_STRUCTURES)
 588
 589 #include <net/radix.h>
 590
 591 #define AF_MAX          35      /* XXX */
 592
 593 /*
 594  * Network address lookup element
 595  */
 596 struct netcred {
 597         struct  radix_node netc_rnodes[2];
 598         int     netc_exflags;
 599         struct  ucred netc_anon;
 600 };
 601
 602 /*
 603  * Network export information
 604  */
 605 struct netexport {
 606         struct  netcred ne_defexported;               /* Default export */
 607         struct  radix_node_head *ne_rtable[AF_MAX+1]; /* Individual exports */
 608 };
 609
 610 #endif
 611
 612 #ifdef _KERNEL
 613
 614 extern  char *mountrootfsname;
 615
 616 /*
 617  * exported vnode operations
 618  */
 619 int     dounmount (struct mount *, int);
 620 int     vfs_setpublicfs                     /* set publicly exported fs */
 621           (struct mount *, struct netexport *, const struct export_args *);
 622 int     vfs_lock (struct mount *);         /* lock a vfs */
 623 void    vfs_msync (struct mount *, int);
 624 void    vfs_unlock (struct mount *);       /* unlock a vfs */
 625 int     vfs_busy (struct mount *, int);
 626 void    vfs_bufstats(void);
 627 int     vfs_export                          /* process mount export info */
 628           (struct mount *, struct netexport *, const struct export_args *);
 629 struct  netcred *vfs_export_lookup          /* lookup host in fs export list */
 630           (struct mount *, struct netexport *, struct sockaddr *);
 631 int     vfs_allocate_syncvnode (struct mount *);
 632 void    vfs_getnewfsid (struct mount *);
 633 int     vfs_setfsid(struct mount *mp, fsid_t *template);
 634 cdev_t  vfs_getrootfsid (struct mount *);
 635 struct  mount *vfs_getvfs (fsid_t *);      /* return vfs given fsid */
 636 int     vfs_modevent (module_t, int, void *);
 637 int     vfs_mountedon (struct vnode *);    /* is a vfs mounted on vp */
 638 int     vfs_rootmountalloc (char *, char *, struct mount **);
 639 void    vfs_unbusy (struct mount *);
 640 void    vfs_unmountall (void);
 641 int     vfs_register (struct vfsconf *);
 642 int     vfs_unregister (struct vfsconf *);
 643 extern  struct nfs_public nfs_pub;
 644
 645 /*
 646  * Declarations for these vfs default operations are located in
 647  * kern/vfs_default.c, they should be used instead of making "dummy"
 648  * functions or casting entries in the VFS op table to "enopnotsupp()".
 649  */
 650 vfs_start_t     vfs_stdstart;
 651 vfs_mount_t     vfs_stdmount;
 652 vfs_unmount_t   vfs_stdunmount;
 653 vfs_root_t      vfs_stdroot;
 654 vfs_quotactl_t  vfs_stdquotactl;
 655 vfs_statfs_t    vfs_stdstatfs;
 656 vfs_statvfs_t   vfs_stdstatvfs;
 657 vfs_sync_t      vfs_stdsync;
 658 vfs_sync_t      vfs_stdnosync;
 659 vfs_vget_t      vfs_stdvget;
 660 vfs_fhtovp_t    vfs_stdfhtovp;
 661 vfs_checkexp_t  vfs_stdcheckexp;
 662 vfs_vptofh_t    vfs_stdvptofh;
 663 vfs_init_t      vfs_stdinit;
 664 vfs_uninit_t    vfs_stduninit;
 665 vfs_extattrctl_t vfs_stdextattrctl;
 666
 667 struct vop_access_args;
 668 int vop_helper_access(struct vop_access_args *ap, uid_t ino_uid, gid_t ino_gid,
 669                         mode_t ino_mode, u_int32_t ino_flags);
 670 int vop_helper_setattr_flags(u_int32_t *ino_flags, u_int32_t vaflags,
 671                         uid_t uid, struct ucred *cred);
 672 uid_t vop_helper_create_uid(struct mount *mp, mode_t dmode, uid_t duid,
 673                         struct ucred *cred, mode_t *modep);
 674 int vop_helper_chmod(struct vnode *vp, mode_t new_mode, struct ucred *cred,
 675                         uid_t cur_uid, gid_t cur_gid, mode_t *cur_modep);
 676 int vop_helper_chown(struct vnode *vp, uid_t new_uid, gid_t new_gid,
 677                         struct ucred *cred,
 678                         uid_t *cur_uidp, gid_t *cur_gidp, mode_t *cur_modep);
 679
 680 void    add_bio_ops(struct bio_ops *ops);
 681 void    rem_bio_ops(struct bio_ops *ops);
 682
 683 int     journal_mountctl(struct vop_mountctl_args *ap);
 684 void    journal_remove_all_journals(struct mount *mp, int flags);
 685
 686 void    mountlist_insert(struct mount *, int);
 687 int     mountlist_interlock(int (*callback)(struct mount *), struct mount *);
 688 struct mount *mountlist_boot_getfirst(void);
 689 void    mountlist_remove(struct mount *mp);
 690 int     mountlist_scan(int (*callback)(struct mount *, void *), void *, int);
 691
 692 #else /* !_KERNEL */
 693
 694 #include <sys/cdefs.h>
 695
 696 __BEGIN_DECLS
 697 int     fstatfs (int, struct statfs *);
 698 int     getfh (const char *, fhandle_t *);
 699 int     getfsstat (struct statfs *, long, int);
 700 int     getmntinfo (struct statfs **, int);
 701 int     getmntvinfo (struct statfs **, struct statvfs **, int);
 702 int     mount (const char *, const char *, int, void *);
 703 int     statfs (const char *, struct statfs *);
 704 int     unmount (const char *, int);
 705 int     fhopen (const struct fhandle *, int);
 706 int     fhstat (const struct fhandle *, struct stat *);
 707 int     fhstatfs (const struct fhandle *, struct statfs *);
 708
 709 /* C library stuff */
 710 void    endvfsent (void);
 711 struct  ovfsconf *getvfsbyname (const char *);
 712 struct  ovfsconf *getvfsbytype (int);
 713 struct  ovfsconf *getvfsent (void);
 714 #define getvfsbyname    new_getvfsbyname
 715 int     new_getvfsbyname (const char *, struct vfsconf *);
 716 void    setvfsent (int);
 717 int     vfsisloadable (const char *);
 718 int     vfsload (const char *);
 719 __END_DECLS
 720
 721 #endif /* _KERNEL */
 722
 723 #endif /* !_SYS_MOUNT_H_ */
 724