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 1.46 2008/07/07 22:02:10 nant Exp $
  36  */
  37
  38 #ifndef _SYS_MOUNT_H_
  39 #define _SYS_MOUNT_H_
  40
  41 #include <sys/ucred.h>
  42
  43 #ifndef _KERNEL
  44 #if !defined(_POSIX_C_SOURCE) && !defined(_XOPEN_SOURCE)
  45 #include <sys/stat.h>
  46 #endif /* !_POSIX_C_SOURCE */
  47 #endif /* !_KERNEL */
  48
  49 #if defined(_KERNEL) || defined(_KERNEL_STRUCTURES)
  50 #ifndef _SYS_QUEUE_H_
  51 #include <sys/queue.h>
  52 #endif
  53 #ifndef _SYS_LOCK_H_
  54 #include <sys/lock.h>
  55 #endif
  56 #ifndef _SYS_NAMECACHE_H_
  57 #include <sys/namecache.h>
  58 #endif
  59 #ifndef _SYS_STATVFS_H_
  60 #include <sys/statvfs.h>
  61 #endif
  62 #endif
  63
  64 struct thread;
  65 struct journal;
  66 struct vop_ops;
  67 struct vop_mountctl_args;
  68 struct statvfs;
  69
  70 typedef struct fsid { int32_t val[2]; } fsid_t; /* file system id type */
  71
  72 /*
  73  * File identifier.  These are unique per filesystem on a single machine.
  74  *
  75  * fix_ext is also used by HAMMER.
  76  */
  77 #define MAXFIDSZ        16
  78
  79 struct fid {
  80         u_short         fid_len;                /* length of data in bytes */
  81         u_short         fid_ext;                /* extended data           */
  82         char            fid_data[MAXFIDSZ];     /* data (variable length) */
  83 };
  84
  85 /*
  86  * file system statistics
  87  */
  88
  89 #define MFSNAMELEN      16      /* length of fs type name, including null */
  90 #define MNAMELEN        80      /* length of buffer for returned name */
  91
  92 struct statfs {
  93         long    f_spare2;               /* placeholder */
  94         long    f_bsize;                /* fundamental file system block size */
  95         long    f_iosize;               /* optimal transfer block size */
  96         long    f_blocks;               /* total data blocks in file system */
  97         long    f_bfree;                /* free blocks in fs */
  98         long    f_bavail;               /* free blocks avail to non-superuser */
  99         long    f_files;                /* total file nodes in file system */
 100         long    f_ffree;                /* free file nodes in fs */
 101         fsid_t  f_fsid;                 /* file system id */
 102         uid_t   f_owner;                /* user that mounted the filesystem */
 103         int     f_type;                 /* type of filesystem */
 104         int     f_flags;                /* copy of mount exported flags */
 105         long    f_syncwrites;           /* count of sync writes since mount */
 106         long    f_asyncwrites;          /* count of async writes since mount */
 107         char    f_fstypename[MFSNAMELEN]; /* fs type name */
 108         char    f_mntonname[MNAMELEN];  /* directory on which mounted */
 109         long    f_syncreads;            /* count of sync reads since mount */
 110         long    f_asyncreads;           /* count of async reads since mount */
 111         short   f_spares1;              /* unused spare */
 112         char    f_mntfromname[MNAMELEN];/* mounted filesystem */
 113         short   f_spares2;              /* unused spare */
 114         long    f_spare[2];             /* unused spare */
 115 };
 116
 117 #if defined(_KERNEL) || defined(_KERNEL_STRUCTURES)
 118
 119 /*
 120  * bio_ops are associated with the mount structure and used in conjuction
 121  * with the b_dep field in a buffer.  Currently softupdates and HAMMER
 122  * utilize this field.
 123  */
 124 struct buf;
 125
 126 struct bio_ops {
 127         TAILQ_ENTRY(bio_ops) entry;
 128         void    (*io_start) (struct buf *);
 129         void    (*io_complete) (struct buf *);
 130         void    (*io_deallocate) (struct buf *);
 131         int     (*io_fsync) (struct vnode *);
 132         int     (*io_sync) (struct mount *);
 133         void    (*io_movedeps) (struct buf *, struct buf *);
 134         int     (*io_countdeps) (struct buf *, int);
 135         int     (*io_checkread) (struct buf *);
 136         int     (*io_checkwrite) (struct buf *);
 137 };
 138
 139 /*
 140  * Structure per mounted file system.  Each mounted file system has an
 141  * array of operations and an instance record.  The file systems are
 142  * put on a doubly linked list.
 143  *
 144  * NOTE: mnt_nvnodelist and mnt_reservedvnlist.  At the moment vnodes
 145  * are linked into mnt_nvnodelist.  At some point in the near future the
 146  * vnode list will be split into a 'dirty' and 'clean' list. mnt_nvnodelist
 147  * will become the dirty list and mnt_reservedvnlist will become the 'clean'
 148  * list.  Filesystem kld's syncing code should remain compatible since
 149  * they only need to scan the dirty vnode list (nvnodelist -> dirtyvnodelist).
 150  *
 151  * NOTE: All VFSs must at least populate mnt_vn_ops or those VOP ops that
 152  * only take namecache pointers will not be able to find their operations
 153  * vector via namecache->nc_mount.
 154  */
 155 TAILQ_HEAD(vnodelst, vnode);
 156 TAILQ_HEAD(journallst, journal);
 157
 158 struct mount {
 159         TAILQ_ENTRY(mount) mnt_list;            /* mount list */
 160         struct vfsops   *mnt_op;                /* operations on fs */
 161         struct vfsconf  *mnt_vfc;               /* configuration info */
 162         void            *mnt_unused01;
 163         struct vnode    *mnt_syncer;            /* syncer vnode */
 164         struct vnodelst mnt_nvnodelist;         /* list of vnodes this mount */
 165         struct lock     mnt_lock;               /* mount structure lock */
 166         int             mnt_flag;               /* flags shared with user */
 167         int             mnt_kern_flag;          /* kernel only flags */
 168         int             mnt_maxsymlinklen;      /* max size of short symlink */
 169         struct statfs   mnt_stat;               /* cache of filesystem stats */
 170         struct statvfs  mnt_vstat;              /* extended stats */
 171         qaddr_t         mnt_data;               /* private data */
 172         time_t          mnt_time;               /* last time written*/
 173         u_int           mnt_iosize_max;         /* max IO request size */
 174         struct vnodelst mnt_reservedvnlist;     /* (future) dirty vnode list */
 175         int             mnt_nvnodelistsize;     /* # of vnodes on this mount */
 176
 177         /*
 178          * ops vectors have a fixed stacking order.  All primary calls run
 179          * through mnt_vn_ops.  This field is typically assigned to
 180          * mnt_vn_norm_ops.  If journaling has been enabled this field is
 181          * usually assigned to mnt_vn_journal_ops.
 182          */
 183         struct vop_ops  *mnt_vn_use_ops;        /* current ops set */
 184
 185         struct vop_ops  *mnt_vn_coherency_ops;  /* cache coherency ops */
 186         struct vop_ops  *mnt_vn_journal_ops;    /* journaling ops */
 187         struct vop_ops  *mnt_vn_norm_ops;       /* for use by the VFS */
 188         struct vop_ops  *mnt_vn_spec_ops;       /* for use by the VFS */
 189         struct vop_ops  *mnt_vn_fifo_ops;       /* for use by the VFS */
 190         struct nchandle mnt_ncmountpt;          /* mount point */
 191         struct nchandle mnt_ncmounton;          /* mounted on */
 192         int             mnt_refs;               /* nchandle references */
 193
 194         struct journallst mnt_jlist;            /* list of active journals */
 195         u_int8_t        *mnt_jbitmap;           /* streamid bitmap */
 196         int16_t         mnt_streamid;           /* last streamid */
 197
 198         struct bio_ops  *mnt_bioops;            /* BIO ops (hammer, softupd) */
 199 };
 200
 201 #endif /* _KERNEL || _KERNEL_STRUCTURES */
 202
 203 /*
 204  * User specifiable flags.
 205  */
 206 #define MNT_RDONLY      0x00000001      /* read only filesystem */
 207 #define MNT_SYNCHRONOUS 0x00000002      /* file system written synchronously */
 208 #define MNT_NOEXEC      0x00000004      /* can't exec from filesystem */
 209 #define MNT_NOSUID      0x00000008      /* don't honor setuid bits on fs */
 210 #define MNT_NODEV       0x00000010      /* don't interpret special files */
 211 #define MNT_UNION       0x00000020      /* union with underlying filesystem */
 212 #define MNT_ASYNC       0x00000040      /* file system written asynchronously */
 213 #define MNT_SUIDDIR     0x00100000      /* special handling of SUID on dirs */
 214 #define MNT_SOFTDEP     0x00200000      /* soft updates being done */
 215 #define MNT_NOSYMFOLLOW 0x00400000      /* do not follow symlinks */
 216 #define MNT_NOATIME     0x10000000      /* disable update of file access time */
 217 #define MNT_NOCLUSTERR  0x40000000      /* disable cluster read */
 218 #define MNT_NOCLUSTERW  0x80000000      /* disable cluster write */
 219
 220 /*
 221  * NFS export related mount flags.
 222  */
 223 #define MNT_EXRDONLY    0x00000080      /* exported read only */
 224 #define MNT_EXPORTED    0x00000100      /* file system is exported */
 225 #define MNT_DEFEXPORTED 0x00000200      /* exported to the world */
 226 #define MNT_EXPORTANON  0x00000400      /* use anon uid mapping for everyone */
 227 #define MNT_EXKERB      0x00000800      /* exported with Kerberos uid mapping */
 228 #define MNT_EXPUBLIC    0x20000000      /* public export (WebNFS) */
 229
 230 /*
 231  * Flags set by internal operations,
 232  * but visible to the user.
 233  * XXX some of these are not quite right.. (I've never seen the root flag set)
 234  */
 235 #define MNT_LOCAL       0x00001000      /* filesystem is stored locally */
 236 #define MNT_QUOTA       0x00002000      /* quotas are enabled on filesystem */
 237 #define MNT_ROOTFS      0x00004000      /* identifies the root filesystem */
 238 #define MNT_USER        0x00008000      /* mounted by a user */
 239 #define MNT_IGNORE      0x00800000      /* do not show entry in df */
 240
 241 /*
 242  * Mask of flags that are visible to statfs()
 243  * XXX I think that this could now become (~(MNT_CMDFLAGS))
 244  * but the 'mount' program may need changing to handle this.
 245  */
 246 #define MNT_VISFLAGMASK (MNT_RDONLY     | MNT_SYNCHRONOUS | MNT_NOEXEC  | \
 247                         MNT_NOSUID      | MNT_NODEV     | MNT_UNION     | \
 248                         MNT_ASYNC       | MNT_EXRDONLY  | MNT_EXPORTED  | \
 249                         MNT_DEFEXPORTED | MNT_EXPORTANON| MNT_EXKERB    | \
 250                         MNT_LOCAL       | MNT_USER      | MNT_QUOTA     | \
 251                         MNT_ROOTFS      | MNT_NOATIME   | MNT_NOCLUSTERR| \
 252                         MNT_NOCLUSTERW  | MNT_SUIDDIR   | MNT_SOFTDEP   | \
 253                         MNT_IGNORE      | MNT_NOSYMFOLLOW | MNT_EXPUBLIC )
 254 /*
 255  * External filesystem command modifier flags.
 256  * Unmount can use the MNT_FORCE flag.
 257  * XXX These are not STATES and really should be somewhere else.
 258  */
 259 #define MNT_UPDATE      0x00010000      /* not a real mount, just an update */
 260 #define MNT_DELEXPORT   0x00020000      /* delete export host lists */
 261 #define MNT_RELOAD      0x00040000      /* reload filesystem data */
 262 #define MNT_FORCE       0x00080000      /* force unmount or readonly change */
 263 #define MNT_CMDFLAGS    (MNT_UPDATE|MNT_DELEXPORT|MNT_RELOAD|MNT_FORCE)
 264 /*
 265  * Internal filesystem control flags stored in mnt_kern_flag.
 266  *
 267  * MNTK_UNMOUNT locks the mount entry so that name lookup cannot proceed
 268  * past the mount point.  This keeps the subtree stable during mounts
 269  * and unmounts.
 270  *
 271  * MNTK_UNMOUNTF permits filesystems to detect a forced unmount while
 272  * dounmount() is still waiting to lock the mountpoint. This allows
 273  * the filesystem to cancel operations that might otherwise deadlock
 274  * with the unmount attempt (used by NFS).
 275  *
 276  * MNTK_NOSTKMNT prevents mounting another filesystem inside the flagged one.
 277  */
 278 #define MNTK_UNMOUNTF   0x00000001      /* forced unmount in progress */
 279 #define MNTK_NCALIASED  0x00800000      /* namecached aliased */
 280 #define MNTK_UNMOUNT    0x01000000      /* unmount in progress */
 281 #define MNTK_MWAIT      0x02000000      /* waiting for unmount to finish */
 282 #define MNTK_WANTRDWR   0x04000000      /* upgrade to read/write requested */
 283 #define MNTK_FSMID      0x08000000      /* getattr supports FSMIDs */
 284 #define MNTK_NOSTKMNT   0x10000000      /* no stacked mount point allowed */
 285
 286 /*
 287  * mountlist_*() defines
 288  */
 289 #define MNTSCAN_FORWARD         0x0001
 290 #define MNTSCAN_REVERSE         0x0002
 291 #define MNTSCAN_NOBUSY          0x0004
 292
 293 #define MNTINS_FIRST            0x0001
 294 #define MNTINS_LAST             0x0002
 295
 296 /*
 297  * Sysctl CTL_VFS definitions.
 298  *
 299  * Second level identifier specifies which filesystem. Second level
 300  * identifier VFS_VFSCONF returns information about all filesystems.
 301  * Second level identifier VFS_GENERIC is non-terminal.
 302  */
 303 #define VFS_VFSCONF             0       /* get configured filesystems */
 304 #define VFS_GENERIC             0       /* generic filesystem information */
 305 /*
 306  * Third level identifiers for VFS_GENERIC are given below; third
 307  * level identifiers for specific filesystems are given in their
 308  * mount specific header files.
 309  */
 310 #define VFS_MAXTYPENUM  1       /* int: highest defined filesystem type */
 311 #define VFS_CONF        2       /* struct: vfsconf for filesystem given
 312                                    as next argument */
 313
 314 /*
 315  * Flags for various system call interfaces.
 316  *
 317  * waitfor flags to vfs_sync() and getfsstat()
 318  */
 319 #define MNT_WAIT        1       /* synchronously wait for I/O to complete */
 320 #define MNT_NOWAIT      2       /* start all I/O, but do not wait for it */
 321 #define MNT_LAZY        4       /* be lazy and do not necessarily push it all */
 322
 323 /*
 324  * Generic file handle
 325  */
 326 struct fhandle {
 327         fsid_t  fh_fsid;        /* File system id of mount point */
 328         struct  fid fh_fid;     /* File sys specific id */
 329 };
 330 typedef struct fhandle  fhandle_t;
 331
 332 /*
 333  * Export arguments for local filesystem mount calls.
 334  */
 335 struct export_args {
 336         int     ex_flags;               /* export related flags */
 337         uid_t   ex_root;                /* mapping for root uid */
 338         struct  ucred ex_anon;          /* mapping for anonymous user */
 339         struct  sockaddr *ex_addr;      /* net address to which exported */
 340         int     ex_addrlen;             /* and the net address length */
 341         struct  sockaddr *ex_mask;      /* mask of valid bits in saddr */
 342         int     ex_masklen;             /* and the smask length */
 343         char    *ex_indexfile;          /* index file for WebNFS URLs */
 344 };
 345
 346 /*
 347  * Structure holding information for a publicly exported filesystem
 348  * (WebNFS). Currently the specs allow just for one such filesystem.
 349  */
 350 struct nfs_public {
 351         int             np_valid;       /* Do we hold valid information */
 352         fhandle_t       np_handle;      /* Filehandle for pub fs (internal) */
 353         struct mount    *np_mount;      /* Mountpoint of exported fs */
 354         char            *np_index;      /* Index file */
 355 };
 356
 357 /*
 358  * Filesystem configuration information. One of these exists for each
 359  * type of filesystem supported by the kernel. These are searched at
 360  * mount time to identify the requested filesystem.
 361  */
 362 struct vfsconf {
 363         struct  vfsops *vfc_vfsops;     /* filesystem operations vector */
 364         char    vfc_name[MFSNAMELEN];   /* filesystem type name */
 365         int     vfc_typenum;            /* historic filesystem type number */
 366         int     vfc_refcount;           /* number mounted of this type */
 367         int     vfc_flags;              /* permanent flags */
 368         struct  vfsconf *vfc_next;      /* next in list */
 369 };
 370
 371 struct ovfsconf {
 372         void    *vfc_vfsops;
 373         char    vfc_name[32];
 374         int     vfc_index;
 375         int     vfc_refcount;
 376         int     vfc_flags;
 377 };
 378
 379 /*
 380  * NB: these flags refer to IMPLEMENTATION properties, not properties of
 381  * any actual mounts; i.e., it does not make sense to change the flags.
 382  */
 383 #define VFCF_STATIC     0x00010000      /* statically compiled into kernel */
 384 #define VFCF_NETWORK    0x00020000      /* may get data over the network */
 385 #define VFCF_READONLY   0x00040000      /* writes are not implemented */
 386 #define VFCF_SYNTHETIC  0x00080000      /* data does not represent real files */
 387 #define VFCF_LOOPBACK   0x00100000      /* aliases some other mounted FS */
 388 #define VFCF_UNICODE    0x00200000      /* stores file names as Unicode*/
 389
 390 #ifdef _KERNEL
 391
 392 #ifdef MALLOC_DECLARE
 393 MALLOC_DECLARE(M_MOUNT);
 394 #endif
 395 extern int maxvfsconf;          /* highest defined filesystem type */
 396 extern int nfs_mount_type;      /* vfc_typenum for nfs, or -1 */
 397 extern struct vfsconf *vfsconf; /* head of list of filesystem types */
 398
 399 #endif
 400
 401 #if defined(_KERNEL) || defined(_KERNEL_STRUCTURES)
 402
 403 TAILQ_HEAD(mntlist, mount);     /* struct mntlist */
 404
 405 /*
 406  * Operations supported on mounted file system.
 407  */
 408 #ifdef __STDC__
 409 struct nlookupdata;
 410 struct nlookupdata;
 411 struct mbuf;
 412 #endif
 413
 414 typedef int vfs_mount_t(struct mount *mp, char *path, caddr_t data,
 415                                     struct ucred *cred);
 416 typedef int vfs_start_t(struct mount *mp, int flags);
 417 typedef int vfs_unmount_t(struct mount *mp, int mntflags);
 418 typedef int vfs_root_t(struct mount *mp, struct vnode **vpp);
 419 typedef int vfs_quotactl_t(struct mount *mp, int cmds, uid_t uid, caddr_t arg,
 420                                     struct ucred *cred);
 421 typedef int vfs_statfs_t(struct mount *mp, struct statfs *sbp,
 422                                     struct ucred *cred);
 423 typedef int vfs_statvfs_t(struct mount *mp, struct statvfs *sbp,
 424                                     struct ucred *cred);
 425 typedef int vfs_sync_t(struct mount *mp, int waitfor);
 426 typedef int vfs_vget_t(struct mount *mp, ino_t ino, struct vnode **vpp);
 427 typedef int vfs_fhtovp_t(struct mount *mp, struct fid *fhp,
 428                                     struct vnode **vpp);
 429 typedef int vfs_checkexp_t(struct mount *mp, struct sockaddr *nam,
 430                                     int *extflagsp, struct ucred **credanonp);
 431 typedef int vfs_vptofh_t(struct vnode *vp, struct fid *fhp);
 432 typedef int vfs_init_t(struct vfsconf *);
 433 typedef int vfs_uninit_t(struct vfsconf *);
 434 typedef int vfs_extattrctl_t(struct mount *mp, int cmd,const char *attrname,
 435                     caddr_t arg, struct ucred *cred);
 436
 437 struct vfsops {
 438         vfs_mount_t     *vfs_mount;
 439         vfs_start_t     *vfs_start;
 440         vfs_unmount_t   *vfs_unmount;
 441         vfs_root_t      *vfs_root;
 442         vfs_quotactl_t  *vfs_quotactl;
 443         vfs_statfs_t    *vfs_statfs;
 444         vfs_sync_t      *vfs_sync;
 445         vfs_vget_t      *vfs_vget;
 446         vfs_fhtovp_t    *vfs_fhtovp;
 447         vfs_checkexp_t  *vfs_checkexp;
 448         vfs_vptofh_t    *vfs_vptofh;
 449         vfs_init_t      *vfs_init;
 450         vfs_uninit_t    *vfs_uninit;
 451         vfs_extattrctl_t *vfs_extattrctl;
 452         vfs_statvfs_t   *vfs_statvfs;
 453 };
 454
 455 #define VFS_MOUNT(MP, PATH, DATA, CRED) \
 456         (*(MP)->mnt_op->vfs_mount)(MP, PATH, DATA, CRED)
 457 #define VFS_START(MP, FLAGS)      (*(MP)->mnt_op->vfs_start)(MP, FLAGS)
 458 #define VFS_UNMOUNT(MP, FORCE)    (*(MP)->mnt_op->vfs_unmount)(MP, FORCE)
 459 #define VFS_ROOT(MP, VPP)         (*(MP)->mnt_op->vfs_root)(MP, VPP)
 460 #define VFS_QUOTACTL(MP,C,U,A,CRED)     \
 461         (*(MP)->mnt_op->vfs_quotactl)(MP, C, U, A, CRED)
 462 #define VFS_STATFS(MP, SBP, CRED) (*(MP)->mnt_op->vfs_statfs)(MP, SBP, CRED)
 463 #define VFS_STATVFS(MP, SBP, CRED) (*(MP)->mnt_op->vfs_statvfs)(MP, SBP, CRED)
 464 #define VFS_SYNC(MP, WAIT)        (*(MP)->mnt_op->vfs_sync)(MP, WAIT)
 465 #define VFS_VGET(MP, INO, VPP)    (*(MP)->mnt_op->vfs_vget)(MP, INO, VPP)
 466 #define VFS_FHTOVP(MP, FIDP, VPP)       \
 467         (*(MP)->mnt_op->vfs_fhtovp)(MP, FIDP, VPP)
 468 #define VFS_VPTOFH(VP, FIDP)      (*(VP)->v_mount->mnt_op->vfs_vptofh)(VP, FIDP)
 469 #define VFS_CHECKEXP(MP, NAM, EXFLG, CRED) \
 470         (*(MP)->mnt_op->vfs_checkexp)(MP, NAM, EXFLG, CRED)
 471 #define VFS_EXTATTRCTL(MP, C, N, A, CRED) \
 472         (*(MP)->mnt_op->vfs_extattrctl)(MP, C, N, A, CRED)
 473
 474 #endif
 475
 476 #ifdef _KERNEL
 477
 478 #include <sys/module.h>
 479
 480 #define VFS_SET(vfsops, fsname, flags) \
 481         static struct vfsconf fsname ## _vfsconf = {            \
 482                 &vfsops,                                        \
 483                 #fsname,                                        \
 484                 -1,                                             \
 485                 0,                                              \
 486                 flags,                                          \
 487                 NULL                                            \
 488         };                                                      \
 489         static moduledata_t fsname ## _mod = {                  \
 490                 #fsname,                                        \
 491                 vfs_modevent,                                   \
 492                 & fsname ## _vfsconf                            \
 493         };                                                      \
 494         DECLARE_MODULE(fsname, fsname ## _mod, SI_SUB_VFS, SI_ORDER_MIDDLE)
 495
 496 #endif
 497
 498 #if defined(_KERNEL) || defined(_KERNEL_STRUCTURES)
 499
 500 #include <net/radix.h>
 501
 502 #define AF_MAX          35      /* XXX */
 503
 504 /*
 505  * Network address lookup element
 506  */
 507 struct netcred {
 508         struct  radix_node netc_rnodes[2];
 509         int     netc_exflags;
 510         struct  ucred netc_anon;
 511 };
 512
 513 /*
 514  * Network export information
 515  */
 516 struct netexport {
 517         struct  netcred ne_defexported;               /* Default export */
 518         struct  radix_node_head *ne_rtable[AF_MAX+1]; /* Individual exports */
 519 };
 520
 521 #endif
 522
 523 #ifdef _KERNEL
 524
 525 extern  char *mountrootfsname;
 526
 527 /*
 528  * exported vnode operations
 529  */
 530 int     dounmount (struct mount *, int);
 531 int     vfs_setpublicfs                     /* set publicly exported fs */
 532           (struct mount *, struct netexport *, const struct export_args *);
 533 int     vfs_lock (struct mount *);         /* lock a vfs */
 534 void    vfs_msync (struct mount *, int);
 535 void    vfs_unlock (struct mount *);       /* unlock a vfs */
 536 int     vfs_busy (struct mount *, int);
 537 void    vfs_bufstats(void);
 538 int     vfs_export                          /* process mount export info */
 539           (struct mount *, struct netexport *, const struct export_args *);
 540 struct  netcred *vfs_export_lookup          /* lookup host in fs export list */
 541           (struct mount *, struct netexport *, struct sockaddr *);
 542 int     vfs_allocate_syncvnode (struct mount *);
 543 void    vfs_getnewfsid (struct mount *);
 544 cdev_t  vfs_getrootfsid (struct mount *);
 545 struct  mount *vfs_getvfs (fsid_t *);      /* return vfs given fsid */
 546 int     vfs_modevent (module_t, int, void *);
 547 int     vfs_mountedon (struct vnode *);    /* is a vfs mounted on vp */
 548 int     vfs_rootmountalloc (char *, char *, struct mount **);
 549 void    vfs_unbusy (struct mount *);
 550 void    vfs_unmountall (void);
 551 int     vfs_register (struct vfsconf *);
 552 int     vfs_unregister (struct vfsconf *);
 553 extern  struct nfs_public nfs_pub;
 554
 555 /*
 556  * Declarations for these vfs default operations are located in
 557  * kern/vfs_default.c, they should be used instead of making "dummy"
 558  * functions or casting entries in the VFS op table to "enopnotsupp()".
 559  */
 560 vfs_start_t     vfs_stdstart;
 561 vfs_mount_t     vfs_stdmount;
 562 vfs_unmount_t   vfs_stdunmount;
 563 vfs_root_t      vfs_stdroot;
 564 vfs_quotactl_t  vfs_stdquotactl;
 565 vfs_statfs_t    vfs_stdstatfs;
 566 vfs_statvfs_t   vfs_stdstatvfs;
 567 vfs_sync_t      vfs_stdsync;
 568 vfs_sync_t      vfs_stdnosync;
 569 vfs_vget_t      vfs_stdvget;
 570 vfs_fhtovp_t    vfs_stdfhtovp;
 571 vfs_checkexp_t  vfs_stdcheckexp;
 572 vfs_vptofh_t    vfs_stdvptofh;
 573 vfs_init_t      vfs_stdinit;
 574 vfs_uninit_t    vfs_stduninit;
 575 vfs_extattrctl_t vfs_stdextattrctl;
 576
 577 struct vop_access_args;
 578 int vop_helper_access(struct vop_access_args *ap, uid_t ino_uid, gid_t ino_gid,
 579                         mode_t ino_mode, u_int32_t ino_flags);
 580 int vop_helper_setattr_flags(u_int32_t *ino_flags, u_int32_t vaflags,
 581                         uid_t uid, struct ucred *cred);
 582 uid_t vop_helper_create_uid(struct mount *mp, mode_t dmode, uid_t duid,
 583                         struct ucred *cred, mode_t *modep);
 584 int vop_helper_chmod(struct vnode *vp, mode_t new_mode, struct ucred *cred,
 585                         uid_t cur_uid, gid_t cur_gid, mode_t *cur_modep);
 586 int vop_helper_chown(struct vnode *vp, uid_t new_uid, gid_t new_gid,
 587                         struct ucred *cred,
 588                         uid_t *cur_uidp, gid_t *cur_gidp, mode_t *cur_modep);
 589
 590 void    add_bio_ops(struct bio_ops *ops);
 591 void    rem_bio_ops(struct bio_ops *ops);
 592
 593 int     journal_mountctl(struct vop_mountctl_args *ap);
 594 void    journal_remove_all_journals(struct mount *mp, int flags);
 595
 596 void    mountlist_insert(struct mount *, int);
 597 int     mountlist_interlock(int (*callback)(struct mount *), struct mount *);
 598 struct mount *mountlist_boot_getfirst(void);
 599 void    mountlist_remove(struct mount *mp);
 600 int     mountlist_scan(int (*callback)(struct mount *, void *), void *, int);
 601
 602 #else /* !_KERNEL */
 603
 604 #include <sys/cdefs.h>
 605
 606 __BEGIN_DECLS
 607 int     fstatfs (int, struct statfs *);
 608 int     getfh (const char *, fhandle_t *);
 609 int     getfsstat (struct statfs *, long, int);
 610 int     getmntinfo (struct statfs **, int);
 611 int     getmntvinfo (struct statfs **, struct statvfs **, int);
 612 int     mount (const char *, const char *, int, void *);
 613 int     statfs (const char *, struct statfs *);
 614 int     unmount (const char *, int);
 615 int     fhopen (const struct fhandle *, int);
 616 int     fhstat (const struct fhandle *, struct stat *);
 617 int     fhstatfs (const struct fhandle *, struct statfs *);
 618
 619 /* C library stuff */
 620 void    endvfsent (void);
 621 struct  ovfsconf *getvfsbyname (const char *);
 622 struct  ovfsconf *getvfsbytype (int);
 623 struct  ovfsconf *getvfsent (void);
 624 #define getvfsbyname    new_getvfsbyname
 625 int     new_getvfsbyname (const char *, struct vfsconf *);
 626 void    setvfsent (int);
 627 int     vfsisloadable (const char *);
 628 int     vfsload (const char *);
 629 __END_DECLS
 630
 631 #endif /* _KERNEL */
 632
 633 #endif /* !_SYS_MOUNT_H_ */
 634