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 1.38 2008/02/05 20:49:52 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 #endif
  60
  61 struct thread;
  62 struct journal;
  63 struct vop_ops;
  64 struct vop_mountctl_args;
  65
  66 typedef struct fsid { int32_t val[2]; } fsid_t; /* file system id type */
  67
  68 /*
  69  * File identifier.
  70  * These are unique per filesystem on a single machine.
  71  */
  72 #define MAXFIDSZ        16
  73
  74 struct fid {
  75         u_short         fid_len;                /* length of data in bytes */
  76         u_short         fid_reserved;           /* force longword alignment */
  77         char            fid_data[MAXFIDSZ];     /* data (variable length) */
  78 };
  79
  80 /*
  81  * file system statistics
  82  */
  83
  84 #define MFSNAMELEN      16      /* length of fs type name, including null */
  85 #define MNAMELEN        80      /* length of buffer for returned name */
  86
  87 struct statfs {
  88         long    f_spare2;               /* placeholder */
  89         long    f_bsize;                /* fundamental file system block size */
  90         long    f_iosize;               /* optimal transfer block size */
  91         long    f_blocks;               /* total data blocks in file system */
  92         long    f_bfree;                /* free blocks in fs */
  93         long    f_bavail;               /* free blocks avail to non-superuser */
  94         long    f_files;                /* total file nodes in file system */
  95         long    f_ffree;                /* free file nodes in fs */
  96         fsid_t  f_fsid;                 /* file system id */
  97         uid_t   f_owner;                /* user that mounted the filesystem */
  98         int     f_type;                 /* type of filesystem */
  99         int     f_flags;                /* copy of mount exported flags */
 100         long    f_syncwrites;           /* count of sync writes since mount */
 101         long    f_asyncwrites;          /* count of async writes since mount */
 102         char    f_fstypename[MFSNAMELEN]; /* fs type name */
 103         char    f_mntonname[MNAMELEN];  /* directory on which mounted */
 104         long    f_syncreads;            /* count of sync reads since mount */
 105         long    f_asyncreads;           /* count of async reads since mount */
 106         short   f_spares1;              /* unused spare */
 107         char    f_mntfromname[MNAMELEN];/* mounted filesystem */
 108         short   f_spares2;              /* unused spare */
 109         long    f_spare[2];             /* unused spare */
 110 };
 111
 112 #if defined(_KERNEL) || defined(_KERNEL_STRUCTURES)
 113
 114 /*
 115  * bio_ops are associated with the mount structure and used in conjuction
 116  * with the b_dep field in a buffer.  Currently softupdates and HAMMER
 117  * utilize this field.
 118  */
 119 struct buf;
 120
 121 struct bio_ops {
 122         TAILQ_ENTRY(bio_ops) entry;
 123         void    (*io_start) (struct buf *);
 124         void    (*io_complete) (struct buf *);
 125         void    (*io_deallocate) (struct buf *);
 126         int     (*io_fsync) (struct vnode *);
 127         int     (*io_sync) (struct mount *);
 128         void    (*io_movedeps) (struct buf *, struct buf *);
 129         int     (*io_countdeps) (struct buf *, int);
 130         int     (*io_checkread) (struct buf *);
 131         int     (*io_checkwrite) (struct buf *);
 132 };
 133
 134 /*
 135  * Structure per mounted file system.  Each mounted file system has an
 136  * array of operations and an instance record.  The file systems are
 137  * put on a doubly linked list.
 138  *
 139  * NOTE: mnt_nvnodelist and mnt_reservedvnlist.  At the moment vnodes
 140  * are linked into mnt_nvnodelist.  At some point in the near future the
 141  * vnode list will be split into a 'dirty' and 'clean' list. mnt_nvnodelist
 142  * will become the dirty list and mnt_reservedvnlist will become the 'clean'
 143  * list.  Filesystem kld's syncing code should remain compatible since
 144  * they only need to scan the dirty vnode list (nvnodelist -> dirtyvnodelist).
 145  *
 146  * NOTE: All VFSs must at least populate mnt_vn_ops or those VOP ops that
 147  * only take namecache pointers will not be able to find their operations
 148  * vector via namecache->nc_mount.
 149  */
 150 TAILQ_HEAD(vnodelst, vnode);
 151 TAILQ_HEAD(journallst, journal);
 152
 153 struct mount {
 154         TAILQ_ENTRY(mount) mnt_list;            /* mount list */
 155         struct vfsops   *mnt_op;                /* operations on fs */
 156         struct vfsconf  *mnt_vfc;               /* configuration info */
 157         void            *mnt_unused01;
 158         struct vnode    *mnt_syncer;            /* syncer vnode */
 159         struct vnodelst mnt_nvnodelist;         /* list of vnodes this mount */
 160         struct lock     mnt_lock;               /* mount structure lock */
 161         int             mnt_flag;               /* flags shared with user */
 162         int             mnt_kern_flag;          /* kernel only flags */
 163         int             mnt_maxsymlinklen;      /* max size of short symlink */
 164         struct statfs   mnt_stat;               /* cache of filesystem stats */
 165         qaddr_t         mnt_data;               /* private data */
 166         time_t          mnt_time;               /* last time written*/
 167         u_int           mnt_iosize_max;         /* max IO request size */
 168         struct vnodelst mnt_reservedvnlist;     /* (future) dirty vnode list */
 169         int             mnt_nvnodelistsize;     /* # of vnodes on this mount */
 170
 171         /*
 172          * ops vectors have a fixed stacking order.  All primary calls run
 173          * through mnt_vn_ops.  This field is typically assigned to
 174          * mnt_vn_norm_ops.  If journaling has been enabled this field is
 175          * usually assigned to mnt_vn_journal_ops.
 176          */
 177         struct vop_ops  *mnt_vn_use_ops;        /* current ops set */
 178
 179         struct vop_ops  *mnt_vn_coherency_ops;  /* cache coherency ops */
 180         struct vop_ops  *mnt_vn_journal_ops;    /* journaling ops */
 181         struct vop_ops  *mnt_vn_norm_ops;       /* for use by the VFS */
 182         struct vop_ops  *mnt_vn_spec_ops;       /* for use by the VFS */
 183         struct vop_ops  *mnt_vn_fifo_ops;       /* for use by the VFS */
 184         struct nchandle mnt_ncmountpt;          /* mount point */
 185         struct nchandle mnt_ncmounton;          /* mounted on */
 186         int             mnt_refs;               /* nchandle references */
 187
 188         struct journallst mnt_jlist;            /* list of active journals */
 189         u_int8_t        *mnt_jbitmap;           /* streamid bitmap */
 190         int16_t         mnt_streamid;           /* last streamid */
 191
 192         struct bio_ops  *mnt_bioops;            /* BIO ops (hammer, softupd) */
 193 };
 194
 195 #endif /* _KERNEL || _KERNEL_STRUCTURES */
 196
 197 /*
 198  * User specifiable flags.
 199  */
 200 #define MNT_RDONLY      0x00000001      /* read only filesystem */
 201 #define MNT_SYNCHRONOUS 0x00000002      /* file system written synchronously */
 202 #define MNT_NOEXEC      0x00000004      /* can't exec from filesystem */
 203 #define MNT_NOSUID      0x00000008      /* don't honor setuid bits on fs */
 204 #define MNT_NODEV       0x00000010      /* don't interpret special files */
 205 #define MNT_UNION       0x00000020      /* union with underlying filesystem */
 206 #define MNT_ASYNC       0x00000040      /* file system written asynchronously */
 207 #define MNT_SUIDDIR     0x00100000      /* special handling of SUID on dirs */
 208 #define MNT_SOFTDEP     0x00200000      /* soft updates being done */
 209 #define MNT_NOSYMFOLLOW 0x00400000      /* do not follow symlinks */
 210 #define MNT_NOATIME     0x10000000      /* disable update of file access time */
 211 #define MNT_NOCLUSTERR  0x40000000      /* disable cluster read */
 212 #define MNT_NOCLUSTERW  0x80000000      /* disable cluster write */
 213
 214 /*
 215  * NFS export related mount flags.
 216  */
 217 #define MNT_EXRDONLY    0x00000080      /* exported read only */
 218 #define MNT_EXPORTED    0x00000100      /* file system is exported */
 219 #define MNT_DEFEXPORTED 0x00000200      /* exported to the world */
 220 #define MNT_EXPORTANON  0x00000400      /* use anon uid mapping for everyone */
 221 #define MNT_EXKERB      0x00000800      /* exported with Kerberos uid mapping */
 222 #define MNT_EXPUBLIC    0x20000000      /* public export (WebNFS) */
 223
 224 /*
 225  * Flags set by internal operations,
 226  * but visible to the user.
 227  * XXX some of these are not quite right.. (I've never seen the root flag set)
 228  */
 229 #define MNT_LOCAL       0x00001000      /* filesystem is stored locally */
 230 #define MNT_QUOTA       0x00002000      /* quotas are enabled on filesystem */
 231 #define MNT_ROOTFS      0x00004000      /* identifies the root filesystem */
 232 #define MNT_USER        0x00008000      /* mounted by a user */
 233 #define MNT_IGNORE      0x00800000      /* do not show entry in df */
 234
 235 /*
 236  * Mask of flags that are visible to statfs()
 237  * XXX I think that this could now become (~(MNT_CMDFLAGS))
 238  * but the 'mount' program may need changing to handle this.
 239  */
 240 #define MNT_VISFLAGMASK (MNT_RDONLY     | MNT_SYNCHRONOUS | MNT_NOEXEC  | \
 241                         MNT_NOSUID      | MNT_NODEV     | MNT_UNION     | \
 242                         MNT_ASYNC       | MNT_EXRDONLY  | MNT_EXPORTED  | \
 243                         MNT_DEFEXPORTED | MNT_EXPORTANON| MNT_EXKERB    | \
 244                         MNT_LOCAL       | MNT_USER      | MNT_QUOTA     | \
 245                         MNT_ROOTFS      | MNT_NOATIME   | MNT_NOCLUSTERR| \
 246                         MNT_NOCLUSTERW  | MNT_SUIDDIR   | MNT_SOFTDEP   | \
 247                         MNT_IGNORE      | MNT_NOSYMFOLLOW | MNT_EXPUBLIC )
 248 /*
 249  * External filesystem command modifier flags.
 250  * Unmount can use the MNT_FORCE flag.
 251  * XXX These are not STATES and really should be somewhere else.
 252  */
 253 #define MNT_UPDATE      0x00010000      /* not a real mount, just an update */
 254 #define MNT_DELEXPORT   0x00020000      /* delete export host lists */
 255 #define MNT_RELOAD      0x00040000      /* reload filesystem data */
 256 #define MNT_FORCE       0x00080000      /* force unmount or readonly change */
 257 #define MNT_CMDFLAGS    (MNT_UPDATE|MNT_DELEXPORT|MNT_RELOAD|MNT_FORCE)
 258 /*
 259  * Internal filesystem control flags stored in mnt_kern_flag.
 260  *
 261  * MNTK_UNMOUNT locks the mount entry so that name lookup cannot proceed
 262  * past the mount point.  This keeps the subtree stable during mounts
 263  * and unmounts.
 264  *
 265  * MNTK_UNMOUNTF permits filesystems to detect a forced unmount while
 266  * dounmount() is still waiting to lock the mountpoint. This allows
 267  * the filesystem to cancel operations that might otherwise deadlock
 268  * with the unmount attempt (used by NFS).
 269  *
 270  * MNTK_NOSTKMNT prevents mounting another filesystem inside the flagged one.
 271  */
 272 #define MNTK_UNMOUNTF   0x00000001      /* forced unmount in progress */
 273 #define MNTK_NCALIASED  0x00800000      /* namecached aliased */
 274 #define MNTK_UNMOUNT    0x01000000      /* unmount in progress */
 275 #define MNTK_MWAIT      0x02000000      /* waiting for unmount to finish */
 276 #define MNTK_WANTRDWR   0x04000000      /* upgrade to read/write requested */
 277 #define MNTK_FSMID      0x08000000      /* getattr supports FSMIDs */
 278 #define MNTK_NOSTKMNT   0x10000000      /* no stacked mount point allowed */
 279
 280 /*
 281  * mountlist_*() defines
 282  */
 283 #define MNTSCAN_FORWARD         0x0001
 284 #define MNTSCAN_REVERSE         0x0002
 285 #define MNTSCAN_NOBUSY          0x0004
 286
 287 #define MNTINS_FIRST            0x0001
 288 #define MNTINS_LAST             0x0002
 289
 290 /*
 291  * Sysctl CTL_VFS definitions.
 292  *
 293  * Second level identifier specifies which filesystem. Second level
 294  * identifier VFS_VFSCONF returns information about all filesystems.
 295  * Second level identifier VFS_GENERIC is non-terminal.
 296  */
 297 #define VFS_VFSCONF             0       /* get configured filesystems */
 298 #define VFS_GENERIC             0       /* generic filesystem information */
 299 /*
 300  * Third level identifiers for VFS_GENERIC are given below; third
 301  * level identifiers for specific filesystems are given in their
 302  * mount specific header files.
 303  */
 304 #define VFS_MAXTYPENUM  1       /* int: highest defined filesystem type */
 305 #define VFS_CONF        2       /* struct: vfsconf for filesystem given
 306                                    as next argument */
 307
 308 /*
 309  * Flags for various system call interfaces.
 310  *
 311  * waitfor flags to vfs_sync() and getfsstat()
 312  */
 313 #define MNT_WAIT        1       /* synchronously wait for I/O to complete */
 314 #define MNT_NOWAIT      2       /* start all I/O, but do not wait for it */
 315 #define MNT_LAZY        4       /* be lazy and do not necessarily push it all */
 316
 317 /*
 318  * Generic file handle
 319  */
 320 struct fhandle {
 321         fsid_t  fh_fsid;        /* File system id of mount point */
 322         struct  fid fh_fid;     /* File sys specific id */
 323 };
 324 typedef struct fhandle  fhandle_t;
 325
 326 /*
 327  * Export arguments for local filesystem mount calls.
 328  */
 329 struct export_args {
 330         int     ex_flags;               /* export related flags */
 331         uid_t   ex_root;                /* mapping for root uid */
 332         struct  ucred ex_anon;          /* mapping for anonymous user */
 333         struct  sockaddr *ex_addr;      /* net address to which exported */
 334         int     ex_addrlen;             /* and the net address length */
 335         struct  sockaddr *ex_mask;      /* mask of valid bits in saddr */
 336         int     ex_masklen;             /* and the smask length */
 337         char    *ex_indexfile;          /* index file for WebNFS URLs */
 338 };
 339
 340 /*
 341  * Structure holding information for a publicly exported filesystem
 342  * (WebNFS). Currently the specs allow just for one such filesystem.
 343  */
 344 struct nfs_public {
 345         int             np_valid;       /* Do we hold valid information */
 346         fhandle_t       np_handle;      /* Filehandle for pub fs (internal) */
 347         struct mount    *np_mount;      /* Mountpoint of exported fs */
 348         char            *np_index;      /* Index file */
 349 };
 350
 351 /*
 352  * Filesystem configuration information. One of these exists for each
 353  * type of filesystem supported by the kernel. These are searched at
 354  * mount time to identify the requested filesystem.
 355  */
 356 struct vfsconf {
 357         struct  vfsops *vfc_vfsops;     /* filesystem operations vector */
 358         char    vfc_name[MFSNAMELEN];   /* filesystem type name */
 359         int     vfc_typenum;            /* historic filesystem type number */
 360         int     vfc_refcount;           /* number mounted of this type */
 361         int     vfc_flags;              /* permanent flags */
 362         struct  vfsconf *vfc_next;      /* next in list */
 363 };
 364
 365 struct ovfsconf {
 366         void    *vfc_vfsops;
 367         char    vfc_name[32];
 368         int     vfc_index;
 369         int     vfc_refcount;
 370         int     vfc_flags;
 371 };
 372
 373 /*
 374  * NB: these flags refer to IMPLEMENTATION properties, not properties of
 375  * any actual mounts; i.e., it does not make sense to change the flags.
 376  */
 377 #define VFCF_STATIC     0x00010000      /* statically compiled into kernel */
 378 #define VFCF_NETWORK    0x00020000      /* may get data over the network */
 379 #define VFCF_READONLY   0x00040000      /* writes are not implemented */
 380 #define VFCF_SYNTHETIC  0x00080000      /* data does not represent real files */
 381 #define VFCF_LOOPBACK   0x00100000      /* aliases some other mounted FS */
 382 #define VFCF_UNICODE    0x00200000      /* stores file names as Unicode*/
 383
 384 #ifdef _KERNEL
 385
 386 #ifdef MALLOC_DECLARE
 387 MALLOC_DECLARE(M_MOUNT);
 388 #endif
 389 extern int maxvfsconf;          /* highest defined filesystem type */
 390 extern int nfs_mount_type;      /* vfc_typenum for nfs, or -1 */
 391 extern struct vfsconf *vfsconf; /* head of list of filesystem types */
 392
 393 #endif
 394
 395 #if defined(_KERNEL) || defined(_KERNEL_STRUCTURES)
 396
 397 TAILQ_HEAD(mntlist, mount);     /* struct mntlist */
 398
 399 /*
 400  * Operations supported on mounted file system.
 401  */
 402 #ifdef __STDC__
 403 struct nlookupdata;
 404 struct nlookupdata;
 405 struct mbuf;
 406 #endif
 407
 408 typedef int vfs_mount_t(struct mount *mp, char *path, caddr_t data,
 409                                     struct ucred *cred);
 410 typedef int vfs_start_t(struct mount *mp, int flags);
 411 typedef int vfs_unmount_t(struct mount *mp, int mntflags);
 412 typedef int vfs_root_t(struct mount *mp, struct vnode **vpp);
 413 typedef int vfs_quotactl_t(struct mount *mp, int cmds, uid_t uid, caddr_t arg,
 414                                     struct ucred *cred);
 415 typedef int vfs_statfs_t(struct mount *mp, struct statfs *sbp,
 416                                     struct ucred *cred);
 417 typedef int vfs_sync_t(struct mount *mp, int waitfor);
 418 typedef int vfs_vget_t(struct mount *mp, ino_t ino, struct vnode **vpp);
 419 typedef int vfs_fhtovp_t(struct mount *mp, struct fid *fhp,
 420                                     struct vnode **vpp);
 421 typedef int vfs_checkexp_t(struct mount *mp, struct sockaddr *nam,
 422                                     int *extflagsp, struct ucred **credanonp);
 423 typedef int vfs_vptofh_t(struct vnode *vp, struct fid *fhp);
 424 typedef int vfs_init_t(struct vfsconf *);
 425 typedef int vfs_uninit_t(struct vfsconf *);
 426 typedef int vfs_extattrctl_t(struct mount *mp, int cmd,const char *attrname,
 427                     caddr_t arg, struct ucred *cred);
 428
 429 struct vfsops {
 430         vfs_mount_t     *vfs_mount;
 431         vfs_start_t     *vfs_start;
 432         vfs_unmount_t   *vfs_unmount;
 433         vfs_root_t      *vfs_root;
 434         vfs_quotactl_t  *vfs_quotactl;
 435         vfs_statfs_t    *vfs_statfs;
 436         vfs_sync_t      *vfs_sync;
 437         vfs_vget_t      *vfs_vget;
 438         vfs_fhtovp_t    *vfs_fhtovp;
 439         vfs_checkexp_t  *vfs_checkexp;
 440         vfs_vptofh_t    *vfs_vptofh;
 441         vfs_init_t      *vfs_init;
 442         vfs_uninit_t    *vfs_uninit;
 443         vfs_extattrctl_t        *vfs_extattrctl;
 444 };
 445
 446 #define VFS_MOUNT(MP, PATH, DATA, CRED) \
 447         (*(MP)->mnt_op->vfs_mount)(MP, PATH, DATA, CRED)
 448 #define VFS_START(MP, FLAGS)      (*(MP)->mnt_op->vfs_start)(MP, FLAGS)
 449 #define VFS_UNMOUNT(MP, FORCE)    (*(MP)->mnt_op->vfs_unmount)(MP, FORCE)
 450 #define VFS_ROOT(MP, VPP)         (*(MP)->mnt_op->vfs_root)(MP, VPP)
 451 #define VFS_QUOTACTL(MP,C,U,A,CRED)     \
 452         (*(MP)->mnt_op->vfs_quotactl)(MP, C, U, A, CRED)
 453 #define VFS_STATFS(MP, SBP, CRED) (*(MP)->mnt_op->vfs_statfs)(MP, SBP, CRED)
 454 #define VFS_SYNC(MP, WAIT)        (*(MP)->mnt_op->vfs_sync)(MP, WAIT)
 455 #define VFS_VGET(MP, INO, VPP)    (*(MP)->mnt_op->vfs_vget)(MP, INO, VPP)
 456 #define VFS_FHTOVP(MP, FIDP, VPP)       \
 457         (*(MP)->mnt_op->vfs_fhtovp)(MP, FIDP, VPP)
 458 #define VFS_VPTOFH(VP, FIDP)      (*(VP)->v_mount->mnt_op->vfs_vptofh)(VP, FIDP)
 459 #define VFS_CHECKEXP(MP, NAM, EXFLG, CRED) \
 460         (*(MP)->mnt_op->vfs_checkexp)(MP, NAM, EXFLG, CRED)
 461 #define VFS_EXTATTRCTL(MP, C, N, A, CRED) \
 462         (*(MP)->mnt_op->vfs_extattrctl)(MP, C, N, A, CRED)
 463
 464 #endif
 465
 466 #ifdef _KERNEL
 467
 468 #include <sys/module.h>
 469
 470 #define VFS_SET(vfsops, fsname, flags) \
 471         static struct vfsconf fsname ## _vfsconf = {            \
 472                 &vfsops,                                        \
 473                 #fsname,                                        \
 474                 -1,                                             \
 475                 0,                                              \
 476                 flags,                                          \
 477                 NULL                                            \
 478         };                                                      \
 479         static moduledata_t fsname ## _mod = {                  \
 480                 #fsname,                                        \
 481                 vfs_modevent,                                   \
 482                 & fsname ## _vfsconf                            \
 483         };                                                      \
 484         DECLARE_MODULE(fsname, fsname ## _mod, SI_SUB_VFS, SI_ORDER_MIDDLE)
 485
 486 #endif
 487
 488 #if defined(_KERNEL) || defined(_KERNEL_STRUCTURES)
 489
 490 #include <net/radix.h>
 491
 492 #define AF_MAX          34      /* XXX */
 493
 494 /*
 495  * Network address lookup element
 496  */
 497 struct netcred {
 498         struct  radix_node netc_rnodes[2];
 499         int     netc_exflags;
 500         struct  ucred netc_anon;
 501 };
 502
 503 /*
 504  * Network export information
 505  */
 506 struct netexport {
 507         struct  netcred ne_defexported;               /* Default export */
 508         struct  radix_node_head *ne_rtable[AF_MAX+1]; /* Individual exports */
 509 };
 510
 511 #endif
 512
 513 #ifdef _KERNEL
 514
 515 extern  char *mountrootfsname;
 516
 517 /*
 518  * exported vnode operations
 519  */
 520 int     dounmount (struct mount *, int);
 521 int     vfs_setpublicfs                     /* set publicly exported fs */
 522           (struct mount *, struct netexport *, const struct export_args *);
 523 int     vfs_lock (struct mount *);         /* lock a vfs */
 524 void    vfs_msync (struct mount *, int);
 525 void    vfs_unlock (struct mount *);       /* unlock a vfs */
 526 int     vfs_busy (struct mount *, int);
 527 void    vfs_bufstats(void);
 528 int     vfs_export                          /* process mount export info */
 529           (struct mount *, struct netexport *, const struct export_args *);
 530 struct  netcred *vfs_export_lookup          /* lookup host in fs export list */
 531           (struct mount *, struct netexport *, struct sockaddr *);
 532 int     vfs_allocate_syncvnode (struct mount *);
 533 void    vfs_getnewfsid (struct mount *);
 534 cdev_t  vfs_getrootfsid (struct mount *);
 535 struct  mount *vfs_getvfs (fsid_t *);      /* return vfs given fsid */
 536 int     vfs_modevent (module_t, int, void *);
 537 int     vfs_mountedon (struct vnode *);    /* is a vfs mounted on vp */
 538 int     vfs_rootmountalloc (char *, char *, struct mount **);
 539 void    vfs_unbusy (struct mount *);
 540 void    vfs_unmountall (void);
 541 int     vfs_register (struct vfsconf *);
 542 int     vfs_unregister (struct vfsconf *);
 543 extern  struct nfs_public nfs_pub;
 544
 545 /*
 546  * Declarations for these vfs default operations are located in
 547  * kern/vfs_default.c, they should be used instead of making "dummy"
 548  * functions or casting entries in the VFS op table to "enopnotsupp()".
 549  */
 550 vfs_start_t     vfs_stdstart;
 551 vfs_mount_t     vfs_stdmount;
 552 vfs_unmount_t   vfs_stdunmount;
 553 vfs_root_t      vfs_stdroot;
 554 vfs_quotactl_t  vfs_stdquotactl;
 555 vfs_statfs_t    vfs_stdstatfs;
 556 vfs_sync_t      vfs_stdsync;
 557 vfs_sync_t      vfs_stdnosync;
 558 vfs_vget_t      vfs_stdvget;
 559 vfs_fhtovp_t    vfs_stdfhtovp;
 560 vfs_checkexp_t  vfs_stdcheckexp;
 561 vfs_vptofh_t    vfs_stdvptofh;
 562 vfs_init_t      vfs_stdinit;
 563 vfs_uninit_t    vfs_stduninit;
 564 vfs_extattrctl_t vfs_stdextattrctl;
 565
 566 struct vop_access_args;
 567 int vop_helper_access(struct vop_access_args *ap, uid_t ino_uid, gid_t ino_gid,
 568                         mode_t ino_mode, u_int32_t ino_flags);
 569 int vop_helper_setattr_flags(u_int32_t *ino_flags, u_int32_t vaflags,
 570                         uid_t uid, struct ucred *cred);
 571 uid_t vop_helper_create_uid(struct mount *mp, mode_t dmode, uid_t duid,
 572                         struct ucred *cred, mode_t *modep);
 573
 574 void    add_bio_ops(struct bio_ops *ops);
 575 void    rem_bio_ops(struct bio_ops *ops);
 576
 577 int     journal_mountctl(struct vop_mountctl_args *ap);
 578 void    journal_remove_all_journals(struct mount *mp, int flags);
 579
 580 void    mountlist_insert(struct mount *, int);
 581 int     mountlist_interlock(int (*callback)(struct mount *), struct mount *);
 582 struct mount *mountlist_boot_getfirst(void);
 583 void    mountlist_remove(struct mount *mp);
 584 int     mountlist_scan(int (*callback)(struct mount *, void *), void *, int);
 585
 586 #else /* !_KERNEL */
 587
 588 #include <sys/cdefs.h>
 589
 590 __BEGIN_DECLS
 591 int     fstatfs (int, struct statfs *);
 592 int     getfh (const char *, fhandle_t *);
 593 int     getfsstat (struct statfs *, long, int);
 594 int     getmntinfo (struct statfs **, int);
 595 int     mount (const char *, const char *, int, void *);
 596 int     statfs (const char *, struct statfs *);
 597 int     unmount (const char *, int);
 598 int     fhopen (const struct fhandle *, int);
 599 int     fhstat (const struct fhandle *, struct stat *);
 600 int     fhstatfs (const struct fhandle *, struct statfs *);
 601
 602 /* C library stuff */
 603 void    endvfsent (void);
 604 struct  ovfsconf *getvfsbyname (const char *);
 605 struct  ovfsconf *getvfsbytype (int);
 606 struct  ovfsconf *getvfsent (void);
 607 #define getvfsbyname    new_getvfsbyname
 608 int     new_getvfsbyname (const char *, struct vfsconf *);
 609 void    setvfsent (int);
 610 int     vfsisloadable (const char *);
 611 int     vfsload (const char *);
 612 __END_DECLS
 613
 614 #endif /* _KERNEL */
 615
 616 #endif /* !_SYS_MOUNT_H_ */
 617