bsd/sys/mount.h

   1 /*
   2  * Copyright (c) 2000-2005 Apple Computer, Inc. All rights reserved.
   3  *
   4  * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
   5  *
   6  * This file contains Original Code and/or Modifications of Original Code
   7  * as defined in and that are subject to the Apple Public Source License
   8  * Version 2.0 (the 'License'). You may not use this file except in
   9  * compliance with the License. The rights granted to you under the License
  10  * may not be used to create, or enable the creation or redistribution of,
  11  * unlawful or unlicensed copies of an Apple operating system, or to
  12  * circumvent, violate, or enable the circumvention or violation of, any
  13  * terms of an Apple operating system software license agreement.
  14  *
  15  * Please obtain a copy of the License at
  16  * http://www.opensource.apple.com/apsl/ and read it before using this file.
  17  *
  18  * The Original Code and all software distributed under the License are
  19  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  20  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  21  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  22  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  23  * Please see the License for the specific language governing rights and
  24  * limitations under the License.
  25  *
  26  * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
  27  */
  28 /* Copyright (c) 1995 NeXT Computer, Inc. All Rights Reserved */
  29 /*
  30  * Copyright (c) 1989, 1991, 1993
  31  *      The Regents of the University of California.  All rights reserved.
  32  *
  33  * Redistribution and use in source and binary forms, with or without
  34  * modification, are permitted provided that the following conditions
  35  * are met:
  36  * 1. Redistributions of source code must retain the above copyright
  37  *    notice, this list of conditions and the following disclaimer.
  38  * 2. Redistributions in binary form must reproduce the above copyright
  39  *    notice, this list of conditions and the following disclaimer in the
  40  *    documentation and/or other materials provided with the distribution.
  41  * 3. All advertising materials mentioning features or use of this software
  42  *    must display the following acknowledgement:
  43  *      This product includes software developed by the University of
  44  *      California, Berkeley and its contributors.
  45  * 4. Neither the name of the University nor the names of its contributors
  46  *    may be used to endorse or promote products derived from this software
  47  *    without specific prior written permission.
  48  *
  49  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  50  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  51  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  52  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  53  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  54  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  55  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  56  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  57  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  58  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  59  * SUCH DAMAGE.
  60  *
  61  *      @(#)mount.h     8.21 (Berkeley) 5/20/95
  62  */
  63
  64 #ifndef _SYS_MOUNT_H_
  65 #define _SYS_MOUNT_H_
  66
  67 #include <sys/appleapiopts.h>
  68 #include <sys/cdefs.h>
  69 #include <sys/attr.h>           /* needed for vol_capabilities_attr_t */
  70
  71 #ifndef KERNEL
  72 #include <stdint.h>
  73 #include <sys/ucred.h>
  74 #include <sys/queue.h>          /* XXX needed for user builds */
  75 #else
  76 #include <sys/kernel_types.h>
  77 #endif
  78
  79 typedef struct fsid { int32_t val[2]; } fsid_t; /* file system id type */
  80
  81 /*
  82  * file system statistics
  83  */
  84
  85 #define MFSNAMELEN      15      /* length of fs type name, not inc. null */
  86 #define MNAMELEN        90      /* length of buffer for returned name */
  87
  88 /*
  89  * LP64 - WARNING - must be kept in sync with struct user_statfs in mount_internal.h.
  90  */
  91 struct statfs {
  92         short   f_otype;                /* TEMPORARY SHADOW COPY OF f_type */
  93         short   f_oflags;               /* TEMPORARY SHADOW COPY OF f_flags */
  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         short   f_reserved1;    /* spare for later */
 104         short   f_type;                 /* type of filesystem */
 105     long        f_flags;                /* copy of mount exported flags */
 106         long    f_reserved2[2]; /* reserved for future use */
 107         char    f_fstypename[MFSNAMELEN]; /* fs type name */
 108         char    f_mntonname[MNAMELEN];  /* directory on which mounted */
 109         char    f_mntfromname[MNAMELEN];/* mounted filesystem */
 110 #if COMPAT_GETFSSTAT
 111         char    f_reserved3[0]; /* For alignment */
 112         long    f_reserved4[0]; /* For future use */
 113 #else
 114         char    f_reserved3;    /* For alignment */
 115         long    f_reserved4[4]; /* For future use */
 116 #endif
 117 };
 118
 119
 120 #define MFSTYPENAMELEN  16      /* length of fs type name including null */
 121
 122 #if __DARWIN_ALIGN_POWER
 123 #pragma options align=power
 124 #endif
 125
 126 struct vfsstatfs {
 127         uint32_t        f_bsize;        /* fundamental file system block size */
 128         size_t          f_iosize;       /* optimal transfer block size */
 129         uint64_t        f_blocks;       /* total data blocks in file system */
 130         uint64_t        f_bfree;        /* free blocks in fs */
 131         uint64_t        f_bavail;       /* free blocks avail to non-superuser */
 132         uint64_t        f_bused;        /* free blocks avail to non-superuser */
 133         uint64_t        f_files;        /* total file nodes in file system */
 134         uint64_t        f_ffree;        /* free file nodes in fs */
 135         fsid_t          f_fsid;         /* file system id */
 136         uid_t           f_owner;        /* user that mounted the filesystem */
 137         uint64_t        f_flags;        /* copy of mount exported flags */
 138         char            f_fstypename[MFSTYPENAMELEN];/* fs type name inclus */
 139         char            f_mntonname[MAXPATHLEN];/* directory on which mounted */
 140         char            f_mntfromname[MAXPATHLEN];/* mounted filesystem */
 141         uint32_t        f_fssubtype;     /* fs sub-type (flavor) */
 142         void            *f_reserved[2];         /* For future use == 0 */
 143 };
 144
 145 #if __DARWIN_ALIGN_POWER
 146 #pragma options align=reset
 147 #endif
 148
 149 #define VFSATTR_INIT(s)                 ((s)->f_supported = (s)->f_active = 0LL)
 150 #define VFSATTR_SET_SUPPORTED(s, a)     ((s)->f_supported |= VFSATTR_ ## a)
 151 #define VFSATTR_IS_SUPPORTED(s, a)      ((s)->f_supported & VFSATTR_ ## a)
 152 #define VFSATTR_CLEAR_ACTIVE(s, a)      ((s)->f_active &= ~VFSATTR_ ## a)
 153 #define VFSATTR_IS_ACTIVE(s, a)         ((s)->f_active & VFSATTR_ ## a)
 154 #define VFSATTR_ALL_SUPPORTED(s)        (((s)->f_active & (s)->f_supported) == (s)->f_active)
 155 #define VFSATTR_WANTED(s, a)            ((s)->f_active |= VFSATTR_ ## a)
 156 #define VFSATTR_RETURN(s, a, x)         do { (s)-> a = (x); VFSATTR_SET_SUPPORTED(s, a);} while(0)
 157
 158 #define VFSATTR_f_objcount              (1LL<<  0)
 159 #define VFSATTR_f_filecount             (1LL<<  1)
 160 #define VFSATTR_f_dircount              (1LL<<  2)
 161 #define VFSATTR_f_maxobjcount           (1LL<<  3)
 162 #define VFSATTR_f_bsize                 (1LL<< 4)
 163 #define VFSATTR_f_iosize                (1LL<<  5)
 164 #define VFSATTR_f_blocks                (1LL<<  6)
 165 #define VFSATTR_f_bfree                 (1LL<<  7)
 166 #define VFSATTR_f_bavail                (1LL<<  8)
 167 #define VFSATTR_f_bused                 (1LL<<  9)
 168 #define VFSATTR_f_files                 (1LL<< 10)
 169 #define VFSATTR_f_ffree                 (1LL<< 11)
 170 #define VFSATTR_f_fsid                  (1LL<< 12)
 171 #define VFSATTR_f_owner                 (1LL<< 13)
 172 #define VFSATTR_f_capabilities          (1LL<< 14)
 173 #define VFSATTR_f_attributes            (1LL<< 15)
 174 #define VFSATTR_f_create_time           (1LL<< 16)
 175 #define VFSATTR_f_modify_time           (1LL<< 17)
 176 #define VFSATTR_f_access_time           (1LL<< 18)
 177 #define VFSATTR_f_backup_time           (1LL<< 19)
 178 #define VFSATTR_f_fssubtype             (1LL<< 20)
 179 #define VFSATTR_f_vol_name              (1LL<< 21)
 180 #define VFSATTR_f_signature             (1LL<< 22)
 181 #define VFSATTR_f_carbon_fsid           (1LL<< 23)
 182
 183 /*
 184  * New VFS_STAT argument structure.
 185  */
 186 #if __DARWIN_ALIGN_POWER
 187 #pragma options align=power
 188 #endif
 189
 190 struct vfs_attr {
 191         uint64_t        f_supported;
 192         uint64_t        f_active;
 193
 194         uint64_t        f_objcount;     /* number of filesystem objects in volume */
 195         uint64_t        f_filecount;    /* ... files */
 196         uint64_t        f_dircount;     /* ... directories */
 197         uint64_t        f_maxobjcount;  /* maximum number of filesystem objects */
 198
 199         uint32_t        f_bsize;        /* block size for the below size values */
 200         size_t          f_iosize;       /* optimal transfer block size */
 201         uint64_t        f_blocks;       /* total data blocks in file system */
 202         uint64_t        f_bfree;        /* free blocks in fs */
 203         uint64_t        f_bavail;       /* free blocks avail to non-superuser */
 204         uint64_t        f_bused;        /* blocks in use */
 205         uint64_t        f_files;        /* total file nodes in file system */
 206         uint64_t        f_ffree;        /* free file nodes in fs */
 207         fsid_t          f_fsid;         /* file system id */
 208         uid_t           f_owner;        /* user that mounted the filesystem */
 209
 210         vol_capabilities_attr_t f_capabilities;
 211         vol_attributes_attr_t f_attributes;
 212
 213         struct timespec f_create_time;  /* creation time */
 214         struct timespec f_modify_time;  /* last modification time */
 215         struct timespec f_access_time;  /* time of last access */
 216         struct timespec f_backup_time;  /* last backup time */
 217
 218         uint32_t        f_fssubtype;    /* filesystem subtype */
 219
 220         char            *f_vol_name;    /* volume name */
 221
 222         uint16_t        f_signature;    /* used for ATTR_VOL_SIGNATURE, Carbon's FSVolumeInfo.signature */
 223         uint16_t        f_carbon_fsid;  /* same as Carbon's FSVolumeInfo.filesystemID */
 224 };
 225
 226 #if __DARWIN_ALIGN_POWER
 227 #pragma options align=reset
 228 #endif
 229
 230 /*
 231  * User specifiable flags.
 232  *
 233  * Unmount uses MNT_FORCE flag.
 234  */
 235 #define MNT_RDONLY      0x00000001      /* read only filesystem */
 236 #define MNT_SYNCHRONOUS 0x00000002      /* file system written synchronously */
 237 #define MNT_NOEXEC      0x00000004      /* can't exec from filesystem */
 238 #define MNT_NOSUID      0x00000008      /* don't honor setuid bits on fs */
 239 #define MNT_NODEV       0x00000010      /* don't interpret special files */
 240 #define MNT_UNION       0x00000020      /* union with underlying filesystem */
 241 #define MNT_ASYNC       0x00000040      /* file system written asynchronously */
 242 #define MNT_DONTBROWSE  0x00100000      /* file system is not appropriate path to user data */
 243 #define MNT_IGNORE_OWNERSHIP 0x00200000 /* VFS will ignore ownership information on filesystem
 244                                          * objects */
 245 #define MNT_AUTOMOUNTED 0x00400000      /* filesystem was mounted by automounter */
 246 #define MNT_JOURNALED   0x00800000  /* filesystem is journaled */
 247 #define MNT_NOUSERXATTR 0x01000000      /* Don't allow user extended attributes */
 248 #define MNT_DEFWRITE    0x02000000      /* filesystem should defer writes */
 249
 250 /* backwards compatibility only */
 251 #define MNT_UNKNOWNPERMISSIONS MNT_IGNORE_OWNERSHIP
 252
 253 /*
 254  * NFS export related mount flags.
 255  */
 256 #define MNT_EXPORTED    0x00000100      /* file system is exported */
 257
 258 /*
 259  * Flags set by internal operations.
 260  */
 261 #define MNT_LOCAL       0x00001000      /* filesystem is stored locally */
 262 #define MNT_QUOTA       0x00002000      /* quotas are enabled on filesystem */
 263 #define MNT_ROOTFS      0x00004000      /* identifies the root filesystem */
 264 #define MNT_DOVOLFS     0x00008000      /* FS supports volfs */
 265
 266 /*
 267  * XXX I think that this could now become (~(MNT_CMDFLAGS))
 268  * but the 'mount' program may need changing to handle this.
 269  */
 270 #define MNT_VISFLAGMASK (MNT_RDONLY     | MNT_SYNCHRONOUS | MNT_NOEXEC  | \
 271                         MNT_NOSUID      | MNT_NODEV     | MNT_UNION     | \
 272                         MNT_ASYNC       | MNT_EXPORTED  | \
 273                         MNT_LOCAL       |               MNT_QUOTA       | \
 274                         MNT_ROOTFS      | MNT_DOVOLFS   | MNT_DONTBROWSE | \
 275                         MNT_UNKNOWNPERMISSIONS | MNT_AUTOMOUNTED | MNT_JOURNALED | \
 276                         MNT_DEFWRITE)
 277 /*
 278  * External filesystem command modifier flags.
 279  * Unmount can use the MNT_FORCE flag.
 280  * XXX These are not STATES and really should be somewhere else.
 281  * External filesystem control flags.
 282  */
 283 #define MNT_UPDATE      0x00010000      /* not a real mount, just an update */
 284 #define MNT_RELOAD      0x00040000      /* reload filesystem data */
 285 #define MNT_FORCE       0x00080000      /* force unmount or readonly change */
 286 #define MNT_CMDFLAGS    (MNT_UPDATE|MNT_RELOAD|MNT_FORCE)
 287
 288
 289
 290 /*
 291  * Sysctl CTL_VFS definitions.
 292  *
 293  * Second level identifier specifies which filesystem. Second level
 294  * identifier VFS_GENERIC returns information about all filesystems.
 295  */
 296 #define VFS_GENERIC             0       /* generic filesystem information */
 297 #define VFS_NUMMNTOPS           1       /* int: total num of vfs mount/unmount operations */
 298 /*
 299  * Third level identifiers for VFS_GENERIC are given below; third
 300  * level identifiers for specific filesystems are given in their
 301  * mount specific header files.
 302  */
 303 #define VFS_MAXTYPENUM  1       /* int: highest defined filesystem type */
 304 #define VFS_CONF        2       /* struct: vfsconf for filesystem given
 305                                    as next argument */
 306 #define VFS_SET_PACKAGE_EXTS 3  /* set package extension list */
 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
 316
 317 #ifndef KERNEL
 318 struct mount;
 319 typedef struct mount * mount_t;
 320 struct vnode;
 321 typedef struct vnode * vnode_t;
 322 #endif
 323
 324 struct vfsconf {
 325         struct  vfsops *vfc_vfsops;     /* filesystem operations vector */
 326         char    vfc_name[MFSNAMELEN];   /* filesystem type name */
 327         int     vfc_typenum;            /* historic filesystem type number */
 328         int     vfc_refcount;           /* number mounted of this type */
 329         int     vfc_flags;              /* permanent flags */
 330         int     (*vfc_mountroot)(mount_t, vnode_t);     /* if != NULL, routine to mount root */
 331         struct  vfsconf *vfc_next;      /* next in list */
 332 };
 333
 334 struct vfsidctl {
 335         int             vc_vers;        /* should be VFSIDCTL_VERS1 (below) */
 336         fsid_t          vc_fsid;        /* fsid to operate on. */
 337         void            *vc_ptr;        /* pointer to data structure. */
 338         size_t          vc_len;         /* sizeof said structure. */
 339         u_int32_t       vc_spare[12];   /* spare (must be zero). */
 340 };
 341
 342
 343 /* vfsidctl API version. */
 344 #define VFS_CTL_VERS1   0x01
 345
 346 #ifdef KERNEL
 347 // LP64todo - should this move?
 348
 349 /* LP64 version of vfsconf.  all pointers
 350  * grow when we're dealing with a 64-bit process.
 351  * WARNING - keep in sync with vfsconf
 352  */
 353 #if __DARWIN_ALIGN_NATURAL
 354 #pragma options align=natural
 355 #endif
 356
 357 struct user_vfsconf {
 358        user_addr_t      vfc_vfsops;                             /* filesystem operations vector */
 359        char                     vfc_name[MFSNAMELEN];   /* filesystem type name */
 360        int                      vfc_typenum;            /* historic filesystem type number */
 361        int                      vfc_refcount;           /* number mounted of this type */
 362        int                      vfc_flags;                              /* permanent flags */
 363        user_addr_t      vfc_mountroot;          /* if != NULL, routine to mount root */
 364        user_addr_t      vfc_next;                               /* next in list */
 365 };
 366
 367 struct user_vfsidctl {
 368        int                              vc_vers;        /* should be VFSIDCTL_VERS1 (below) */
 369        fsid_t                   vc_fsid;                /* fsid to operate on. */
 370        user_addr_t              vc_ptr;                 /* pointer to data structure. */
 371        user_size_t              vc_len;                 /* sizeof said structure. */
 372        u_int32_t                vc_spare[12];   /* spare (must be zero). */
 373 };
 374
 375 #if __DARWIN_ALIGN_NATURAL
 376 #pragma options align=reset
 377 #endif
 378
 379 #endif /* KERNEL */
 380
 381 /*
 382  * New style VFS sysctls, do not reuse/conflict with the namespace for
 383  * private sysctls.
 384  */
 385 #define VFS_CTL_STATFS  0x00010001      /* statfs */
 386 #define VFS_CTL_UMOUNT  0x00010002      /* unmount */
 387 #define VFS_CTL_QUERY   0x00010003      /* anything wrong? (vfsquery) */
 388 #define VFS_CTL_NEWADDR 0x00010004      /* reconnect to new address */
 389 #define VFS_CTL_TIMEO   0x00010005      /* set timeout for vfs notification */
 390 #define VFS_CTL_NOLOCKS 0x00010006      /* disable file locking */
 391
 392 struct vfsquery {
 393         u_int32_t       vq_flags;
 394         u_int32_t       vq_spare[31];
 395 };
 396
 397 /* vfsquery flags */
 398 #define VQ_NOTRESP      0x0001  /* server down */
 399 #define VQ_NEEDAUTH     0x0002  /* server bad auth */
 400 #define VQ_LOWDISK      0x0004  /* we're low on space */
 401 #define VQ_MOUNT        0x0008  /* new filesystem arrived */
 402 #define VQ_UNMOUNT      0x0010  /* filesystem has left */
 403 #define VQ_DEAD         0x0020  /* filesystem is dead, needs force unmount */
 404 #define VQ_ASSIST       0x0040  /* filesystem needs assistance from external program */
 405 #define VQ_NOTRESPLOCK  0x0080  /* server lockd down */
 406 #define VQ_UPDATE       0x0100  /* filesystem information has changed */
 407 #define VQ_FLAG0200     0x0200  /* placeholder */
 408 #define VQ_FLAG0400     0x0400  /* placeholder */
 409 #define VQ_FLAG0800     0x0800  /* placeholder */
 410 #define VQ_FLAG1000     0x1000  /* placeholder */
 411 #define VQ_FLAG2000     0x2000  /* placeholder */
 412 #define VQ_FLAG4000     0x4000  /* placeholder */
 413 #define VQ_FLAG8000     0x8000  /* placeholder */
 414
 415
 416 #ifdef KERNEL
 417
 418 /* Structure for setting device IO parameters per mount point */
 419 struct vfsioattr {
 420         u_int32_t       io_maxreadcnt;          /* Max. byte count for read */
 421         u_int32_t       io_maxwritecnt;         /* Max. byte count for write */
 422         u_int32_t       io_segreadcnt;          /* Max. segment count for read */
 423         u_int32_t       io_segwritecnt;         /* Max. segment count for write */
 424         u_int32_t       io_maxsegreadsize;      /* Max. segment read size  */
 425         u_int32_t       io_maxsegwritesize;     /* Max. segment write size */
 426         u_int32_t       io_devblocksize;        /* the underlying device block size */
 427         void *          io_reserved[3];         /* extended attribute information */
 428 };
 429
 430
 431 /*
 432  * Filesystem Registration information
 433  */
 434
 435 #define VFS_TBLTHREADSAFE       0x01
 436 #define VFS_TBLFSNODELOCK       0x02
 437 #define VFS_TBLNOTYPENUM        0x08
 438 #define VFS_TBLLOCALVOL         0x10
 439 #define VFS_TBL64BITREADY       0x20
 440
 441 struct vfs_fsentry {
 442         struct vfsops * vfe_vfsops;     /* vfs operations */
 443         int             vfe_vopcnt;     /* # of vnodeopv_desc being registered (reg, spec, fifo ...) */
 444         struct vnodeopv_desc ** vfe_opvdescs; /* null terminated;  */
 445         int                     vfe_fstypenum;  /* historic filesystem type number */
 446         char            vfe_fsname[MFSNAMELEN]; /* filesystem type name */
 447         uint32_t        vfe_flags;              /* defines the FS capabilities */
 448     void *              vfe_reserv[2];  /* reserved for future use; set this to zero*/
 449  };
 450
 451
 452
 453 struct vfsops {
 454         int  (*vfs_mount)(struct mount *mp, vnode_t devvp, user_addr_t data, vfs_context_t context);
 455         int  (*vfs_start)(struct mount *mp, int flags, vfs_context_t context);
 456         int  (*vfs_unmount)(struct mount *mp, int mntflags, vfs_context_t context);
 457         int  (*vfs_root)(struct mount *mp, struct vnode **vpp, vfs_context_t context);
 458         int  (*vfs_quotactl)(struct mount *mp, int cmds, uid_t uid, caddr_t arg, vfs_context_t context);
 459         int  (*vfs_getattr)(struct mount *mp, struct vfs_attr *, vfs_context_t context);
 460 /*      int  (*vfs_statfs)(struct mount *mp, struct vfsstatfs *sbp, vfs_context_t context);*/
 461         int  (*vfs_sync)(struct mount *mp, int waitfor, vfs_context_t context);
 462         int  (*vfs_vget)(struct mount *mp, ino64_t ino, struct vnode **vpp, vfs_context_t context);
 463         int  (*vfs_fhtovp)(struct mount *mp, int fhlen, unsigned char *fhp, struct vnode **vpp,
 464                            vfs_context_t context);
 465         int  (*vfs_vptofh)(struct vnode *vp, int *fhlen, unsigned char *fhp, vfs_context_t context);
 466         int  (*vfs_init)(struct vfsconf *);
 467         int  (*vfs_sysctl)(int *, u_int, user_addr_t, size_t *, user_addr_t, size_t, vfs_context_t context);
 468         int  (*vfs_setattr)(struct mount *mp, struct vfs_attr *, vfs_context_t context);
 469         void *vfs_reserved[7];
 470 };
 471
 472
 473 /*
 474  * flags passed into vfs_iterate
 475  */
 476
 477 /*
 478  * return values from callback
 479  */
 480 #define VFS_RETURNED            0       /* done with vnode, reference can be dropped */
 481 #define VFS_RETURNED_DONE       1       /* done with vnode, reference can be dropped, terminate iteration */
 482 #define VFS_CLAIMED             2       /* don't drop reference */
 483 #define VFS_CLAIMED_DONE        3       /* don't drop reference, terminate iteration */
 484
 485
 486 __BEGIN_DECLS
 487 /*
 488  * prototypes for exported VFS operations
 489  */
 490 extern int VFS_MOUNT(mount_t, vnode_t, user_addr_t, vfs_context_t);
 491 extern int VFS_START(mount_t, int, vfs_context_t);
 492 extern int VFS_UNMOUNT(mount_t, int, vfs_context_t);
 493 extern int VFS_ROOT(mount_t, vnode_t *, vfs_context_t);
 494 extern int VFS_QUOTACTL(mount_t, int, uid_t, caddr_t, vfs_context_t);
 495 extern int VFS_SYNC(mount_t, int, vfs_context_t);
 496 extern int VFS_VGET(mount_t, ino64_t, vnode_t *, vfs_context_t);
 497 extern int VFS_FHTOVP(mount_t, int, unsigned char *, vnode_t *, vfs_context_t);
 498 extern int VFS_VPTOFH(vnode_t, int *, unsigned char *, vfs_context_t);
 499
 500 /* The file system registrartion KPI */
 501 int vfs_fsadd(struct vfs_fsentry *, vfstable_t *);
 502 int vfs_fsremove(vfstable_t);
 503 int     vfs_iterate(int, int (*)(struct mount *, void *), void *);
 504
 505 uint64_t vfs_flags(mount_t);
 506 void    vfs_setflags(mount_t, uint64_t);
 507 void    vfs_clearflags(mount_t, uint64_t);
 508
 509 int     vfs_issynchronous(mount_t);
 510 int     vfs_iswriteupgrade(mount_t);
 511 int     vfs_isupdate(mount_t);
 512 int     vfs_isreload(mount_t);
 513 int     vfs_isforce(mount_t);
 514 int     vfs_isrdonly(mount_t);
 515 int     vfs_isrdwr(mount_t);
 516 int     vfs_authopaque(mount_t);
 517 int     vfs_authopaqueaccess(mount_t);
 518 void    vfs_setauthopaque(mount_t);
 519 void    vfs_setauthopaqueaccess(mount_t);
 520 void    vfs_clearauthopaque(mount_t);
 521 void    vfs_clearauthopaqueaccess(mount_t);
 522 int     vfs_extendedsecurity(mount_t);
 523 void    vfs_setextendedsecurity(mount_t);
 524 void    vfs_clearextendedsecurity(mount_t);
 525 void    vfs_setlocklocal(mount_t);
 526
 527
 528
 529 uint32_t vfs_maxsymlen(mount_t);
 530 void    vfs_setmaxsymlen(mount_t, uint32_t);
 531 void *  vfs_fsprivate(mount_t);
 532 void    vfs_setfsprivate(mount_t, void *mntdata);
 533
 534 struct vfsstatfs *      vfs_statfs(mount_t);
 535 int     vfs_update_vfsstat(mount_t, vfs_context_t);
 536 int     vfs_getattr(mount_t mp, struct vfs_attr *vfa, vfs_context_t ctx);
 537 int     vfs_setattr(mount_t mp, struct vfs_attr *vfa, vfs_context_t ctx);
 538
 539 int     vfs_typenum(mount_t);
 540 void    vfs_name(mount_t, char *);
 541 int     vfs_devblocksize(mount_t);
 542 void    vfs_ioattr(mount_t, struct vfsioattr *);
 543 void    vfs_setioattr(mount_t, struct vfsioattr *);
 544 int     vfs_64bitready(mount_t);
 545
 546
 547 int     vfs_busy(mount_t, int);
 548 void    vfs_unbusy(mount_t);
 549
 550 void    vfs_getnewfsid(struct mount *);
 551 mount_t vfs_getvfs(fsid_t *);
 552 mount_t vfs_getvfs_by_mntonname(u_char *);
 553 int     vfs_mountedon(struct vnode *);
 554
 555 void    vfs_event_signal(fsid_t *, u_int32_t, intptr_t);
 556 void    vfs_event_init(void);
 557 __END_DECLS
 558
 559 #endif /* KERNEL */
 560
 561 #ifndef KERNEL
 562
 563 /*
 564  * Generic file handle
 565  */
 566 #define NFS_MAX_FH_SIZE         64
 567 #define NFSV2_MAX_FH_SIZE       32
 568 struct fhandle {
 569         int             fh_len;                         /* length of file handle */
 570         unsigned char   fh_data[NFS_MAX_FH_SIZE];       /* file handle value */
 571 };
 572 typedef struct fhandle  fhandle_t;
 573
 574
 575 __BEGIN_DECLS
 576 int     fhopen(const struct fhandle *, int);
 577 int     fstatfs(int, struct statfs *);
 578 int     getfh(const char *, fhandle_t *);
 579 int     getfsstat(struct statfs *, int, int);
 580 int     getmntinfo(struct statfs **, int);
 581 int     mount(const char *, const char *, int, void *);
 582 int     statfs(const char *, struct statfs *);
 583 int     unmount(const char *, int);
 584 int     getvfsbyname(const char *, struct vfsconf *);
 585 __END_DECLS
 586
 587 #endif /* KERNEL */
 588 #endif /* !_SYS_MOUNT_H_ */