bsd/sys/mount.h

   1 /*
   2  * Copyright (c) 2006 Apple Computer, Inc. All Rights Reserved.
   3  *
   4  * @APPLE_LICENSE_OSREFERENCE_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
  10  * License may not be used to create, or enable the creation or
  11  * redistribution of, unlawful or unlicensed copies of an Apple operating
  12  * system, or to circumvent, violate, or enable the circumvention or
  13  * violation of, any terms of an Apple operating system software license
  14  * agreement.
  15  *
  16  * Please obtain a copy of the License at
  17  * http://www.opensource.apple.com/apsl/ and read it before using this
  18  * file.
  19  *
  20  * The Original Code and all software distributed under the License are
  21  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  22  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  23  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  24  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  25  * Please see the License for the specific language governing rights and
  26  * limitations under the License.
  27  *
  28  * @APPLE_LICENSE_OSREFERENCE_HEADER_END@
  29  */
  30 /* Copyright (c) 1995 NeXT Computer, Inc. All Rights Reserved */
  31 /*
  32  * Copyright (c) 1989, 1991, 1993
  33  *      The Regents of the University of California.  All rights reserved.
  34  *
  35  * Redistribution and use in source and binary forms, with or without
  36  * modification, are permitted provided that the following conditions
  37  * are met:
  38  * 1. Redistributions of source code must retain the above copyright
  39  *    notice, this list of conditions and the following disclaimer.
  40  * 2. Redistributions in binary form must reproduce the above copyright
  41  *    notice, this list of conditions and the following disclaimer in the
  42  *    documentation and/or other materials provided with the distribution.
  43  * 3. All advertising materials mentioning features or use of this software
  44  *    must display the following acknowledgement:
  45  *      This product includes software developed by the University of
  46  *      California, Berkeley and its contributors.
  47  * 4. Neither the name of the University nor the names of its contributors
  48  *    may be used to endorse or promote products derived from this software
  49  *    without specific prior written permission.
  50  *
  51  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  52  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  53  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  54  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  55  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  56  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  57  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  58  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  59  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  60  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  61  * SUCH DAMAGE.
  62  *
  63  *      @(#)mount.h     8.21 (Berkeley) 5/20/95
  64  */
  65
  66 #ifndef _SYS_MOUNT_H_
  67 #define _SYS_MOUNT_H_
  68
  69 #include <sys/appleapiopts.h>
  70 #include <sys/cdefs.h>
  71 #include <sys/attr.h>           /* needed for vol_capabilities_attr_t */
  72
  73 #ifndef KERNEL
  74 #include <stdint.h>
  75 #include <sys/ucred.h>
  76 #include <sys/queue.h>          /* XXX needed for user builds */
  77 #else
  78 #include <sys/kernel_types.h>
  79 #endif
  80
  81 typedef struct fsid { int32_t val[2]; } fsid_t; /* file system id type */
  82
  83 /*
  84  * file system statistics
  85  */
  86
  87 #define MFSNAMELEN      15      /* length of fs type name, not inc. null */
  88 #define MNAMELEN        90      /* length of buffer for returned name */
  89
  90 /*
  91  * LP64 - WARNING - must be kept in sync with struct user_statfs in mount_internal.h.
  92  */
  93 struct statfs {
  94         short   f_otype;                /* TEMPORARY SHADOW COPY OF f_type */
  95         short   f_oflags;               /* TEMPORARY SHADOW COPY OF f_flags */
  96         long    f_bsize;                /* fundamental file system block size */
  97         long    f_iosize;               /* optimal transfer block size */
  98         long    f_blocks;               /* total data blocks in file system */
  99         long    f_bfree;                /* free blocks in fs */
 100         long    f_bavail;               /* free blocks avail to non-superuser */
 101         long    f_files;                /* total file nodes in file system */
 102         long    f_ffree;                /* free file nodes in fs */
 103         fsid_t  f_fsid;                 /* file system id */
 104         uid_t   f_owner;                /* user that mounted the filesystem */
 105         short   f_reserved1;    /* spare for later */
 106         short   f_type;                 /* type of filesystem */
 107     long        f_flags;                /* copy of mount exported flags */
 108         long    f_reserved2[2]; /* reserved for future use */
 109         char    f_fstypename[MFSNAMELEN]; /* fs type name */
 110         char    f_mntonname[MNAMELEN];  /* directory on which mounted */
 111         char    f_mntfromname[MNAMELEN];/* mounted filesystem */
 112 #if COMPAT_GETFSSTAT
 113         char    f_reserved3[0]; /* For alignment */
 114         long    f_reserved4[0]; /* For future use */
 115 #else
 116         char    f_reserved3;    /* For alignment */
 117         long    f_reserved4[4]; /* For future use */
 118 #endif
 119 };
 120
 121
 122 #define MFSTYPENAMELEN  16      /* length of fs type name including null */
 123
 124 #if __DARWIN_ALIGN_POWER
 125 #pragma options align=power
 126 #endif
 127
 128 struct vfsstatfs {
 129         uint32_t        f_bsize;        /* fundamental file system block size */
 130         size_t          f_iosize;       /* optimal transfer block size */
 131         uint64_t        f_blocks;       /* total data blocks in file system */
 132         uint64_t        f_bfree;        /* free blocks in fs */
 133         uint64_t        f_bavail;       /* free blocks avail to non-superuser */
 134         uint64_t        f_bused;        /* free blocks avail to non-superuser */
 135         uint64_t        f_files;        /* total file nodes in file system */
 136         uint64_t        f_ffree;        /* free file nodes in fs */
 137         fsid_t          f_fsid;         /* file system id */
 138         uid_t           f_owner;        /* user that mounted the filesystem */
 139         uint64_t        f_flags;        /* copy of mount exported flags */
 140         char            f_fstypename[MFSTYPENAMELEN];/* fs type name inclus */
 141         char            f_mntonname[MAXPATHLEN];/* directory on which mounted */
 142         char            f_mntfromname[MAXPATHLEN];/* mounted filesystem */
 143         uint32_t        f_fssubtype;     /* fs sub-type (flavor) */
 144         void            *f_reserved[2];         /* For future use == 0 */
 145 };
 146
 147 #if __DARWIN_ALIGN_POWER
 148 #pragma options align=reset
 149 #endif
 150
 151 #define VFSATTR_INIT(s)                 ((s)->f_supported = (s)->f_active = 0LL)
 152 #define VFSATTR_SET_SUPPORTED(s, a)     ((s)->f_supported |= VFSATTR_ ## a)
 153 #define VFSATTR_IS_SUPPORTED(s, a)      ((s)->f_supported & VFSATTR_ ## a)
 154 #define VFSATTR_CLEAR_ACTIVE(s, a)      ((s)->f_active &= ~VFSATTR_ ## a)
 155 #define VFSATTR_IS_ACTIVE(s, a)         ((s)->f_active & VFSATTR_ ## a)
 156 #define VFSATTR_ALL_SUPPORTED(s)        (((s)->f_active & (s)->f_supported) == (s)->f_active)
 157 #define VFSATTR_WANTED(s, a)            ((s)->f_active |= VFSATTR_ ## a)
 158 #define VFSATTR_RETURN(s, a, x)         do { (s)-> a = (x); VFSATTR_SET_SUPPORTED(s, a);} while(0)
 159
 160 #define VFSATTR_f_objcount              (1LL<<  0)
 161 #define VFSATTR_f_filecount             (1LL<<  1)
 162 #define VFSATTR_f_dircount              (1LL<<  2)
 163 #define VFSATTR_f_maxobjcount           (1LL<<  3)
 164 #define VFSATTR_f_bsize                 (1LL<< 4)
 165 #define VFSATTR_f_iosize                (1LL<<  5)
 166 #define VFSATTR_f_blocks                (1LL<<  6)
 167 #define VFSATTR_f_bfree                 (1LL<<  7)
 168 #define VFSATTR_f_bavail                (1LL<<  8)
 169 #define VFSATTR_f_bused                 (1LL<<  9)
 170 #define VFSATTR_f_files                 (1LL<< 10)
 171 #define VFSATTR_f_ffree                 (1LL<< 11)
 172 #define VFSATTR_f_fsid                  (1LL<< 12)
 173 #define VFSATTR_f_owner                 (1LL<< 13)
 174 #define VFSATTR_f_capabilities          (1LL<< 14)
 175 #define VFSATTR_f_attributes            (1LL<< 15)
 176 #define VFSATTR_f_create_time           (1LL<< 16)
 177 #define VFSATTR_f_modify_time           (1LL<< 17)
 178 #define VFSATTR_f_access_time           (1LL<< 18)
 179 #define VFSATTR_f_backup_time           (1LL<< 19)
 180 #define VFSATTR_f_fssubtype             (1LL<< 20)
 181 #define VFSATTR_f_vol_name              (1LL<< 21)
 182 #define VFSATTR_f_signature             (1LL<< 22)
 183 #define VFSATTR_f_carbon_fsid           (1LL<< 23)
 184
 185 /*
 186  * New VFS_STAT argument structure.
 187  */
 188 #if __DARWIN_ALIGN_POWER
 189 #pragma options align=power
 190 #endif
 191
 192 struct vfs_attr {
 193         uint64_t        f_supported;
 194         uint64_t        f_active;
 195
 196         uint64_t        f_objcount;     /* number of filesystem objects in volume */
 197         uint64_t        f_filecount;    /* ... files */
 198         uint64_t        f_dircount;     /* ... directories */
 199         uint64_t        f_maxobjcount;  /* maximum number of filesystem objects */
 200
 201         uint32_t        f_bsize;        /* block size for the below size values */
 202         size_t          f_iosize;       /* optimal transfer block size */
 203         uint64_t        f_blocks;       /* total data blocks in file system */
 204         uint64_t        f_bfree;        /* free blocks in fs */
 205         uint64_t        f_bavail;       /* free blocks avail to non-superuser */
 206         uint64_t        f_bused;        /* blocks in use */
 207         uint64_t        f_files;        /* total file nodes in file system */
 208         uint64_t        f_ffree;        /* free file nodes in fs */
 209         fsid_t          f_fsid;         /* file system id */
 210         uid_t           f_owner;        /* user that mounted the filesystem */
 211
 212         vol_capabilities_attr_t f_capabilities;
 213         vol_attributes_attr_t f_attributes;
 214
 215         struct timespec f_create_time;  /* creation time */
 216         struct timespec f_modify_time;  /* last modification time */
 217         struct timespec f_access_time;  /* time of last access */
 218         struct timespec f_backup_time;  /* last backup time */
 219
 220         uint32_t        f_fssubtype;    /* filesystem subtype */
 221
 222         char            *f_vol_name;    /* volume name */
 223
 224         uint16_t        f_signature;    /* used for ATTR_VOL_SIGNATURE, Carbon's FSVolumeInfo.signature */
 225         uint16_t        f_carbon_fsid;  /* same as Carbon's FSVolumeInfo.filesystemID */
 226 };
 227
 228 #if __DARWIN_ALIGN_POWER
 229 #pragma options align=reset
 230 #endif
 231
 232 /*
 233  * User specifiable flags.
 234  *
 235  * Unmount uses MNT_FORCE flag.
 236  */
 237 #define MNT_RDONLY      0x00000001      /* read only filesystem */
 238 #define MNT_SYNCHRONOUS 0x00000002      /* file system written synchronously */
 239 #define MNT_NOEXEC      0x00000004      /* can't exec from filesystem */
 240 #define MNT_NOSUID      0x00000008      /* don't honor setuid bits on fs */
 241 #define MNT_NODEV       0x00000010      /* don't interpret special files */
 242 #define MNT_UNION       0x00000020      /* union with underlying filesystem */
 243 #define MNT_ASYNC       0x00000040      /* file system written asynchronously */
 244 #define MNT_DONTBROWSE  0x00100000      /* file system is not appropriate path to user data */
 245 #define MNT_IGNORE_OWNERSHIP 0x00200000 /* VFS will ignore ownership information on filesystem
 246                                          * objects */
 247 #define MNT_AUTOMOUNTED 0x00400000      /* filesystem was mounted by automounter */
 248 #define MNT_JOURNALED   0x00800000  /* filesystem is journaled */
 249 #define MNT_NOUSERXATTR 0x01000000      /* Don't allow user extended attributes */
 250 #define MNT_DEFWRITE    0x02000000      /* filesystem should defer writes */
 251
 252 /* backwards compatibility only */
 253 #define MNT_UNKNOWNPERMISSIONS MNT_IGNORE_OWNERSHIP
 254
 255 /*
 256  * NFS export related mount flags.
 257  */
 258 #define MNT_EXPORTED    0x00000100      /* file system is exported */
 259
 260 /*
 261  * Flags set by internal operations.
 262  */
 263 #define MNT_LOCAL       0x00001000      /* filesystem is stored locally */
 264 #define MNT_QUOTA       0x00002000      /* quotas are enabled on filesystem */
 265 #define MNT_ROOTFS      0x00004000      /* identifies the root filesystem */
 266 #define MNT_DOVOLFS     0x00008000      /* FS supports volfs */
 267
 268 /*
 269  * XXX I think that this could now become (~(MNT_CMDFLAGS))
 270  * but the 'mount' program may need changing to handle this.
 271  */
 272 #define MNT_VISFLAGMASK (MNT_RDONLY     | MNT_SYNCHRONOUS | MNT_NOEXEC  | \
 273                         MNT_NOSUID      | MNT_NODEV     | MNT_UNION     | \
 274                         MNT_ASYNC       | MNT_EXPORTED  | \
 275                         MNT_LOCAL       |               MNT_QUOTA       | \
 276                         MNT_ROOTFS      | MNT_DOVOLFS   | MNT_DONTBROWSE | \
 277                         MNT_UNKNOWNPERMISSIONS | MNT_AUTOMOUNTED | MNT_JOURNALED | \
 278                         MNT_DEFWRITE)
 279 /*
 280  * External filesystem command modifier flags.
 281  * Unmount can use the MNT_FORCE flag.
 282  * XXX These are not STATES and really should be somewhere else.
 283  * External filesystem control flags.
 284  */
 285 #define MNT_UPDATE      0x00010000      /* not a real mount, just an update */
 286 #define MNT_RELOAD      0x00040000      /* reload filesystem data */
 287 #define MNT_FORCE       0x00080000      /* force unmount or readonly change */
 288 #define MNT_CMDFLAGS    (MNT_UPDATE|MNT_RELOAD|MNT_FORCE)
 289
 290
 291
 292 /*
 293  * Sysctl CTL_VFS definitions.
 294  *
 295  * Second level identifier specifies which filesystem. Second level
 296  * identifier VFS_GENERIC returns information about all filesystems.
 297  */
 298 #define VFS_GENERIC             0       /* generic filesystem information */
 299 #define VFS_NUMMNTOPS           1       /* int: total num of vfs mount/unmount operations */
 300 /*
 301  * Third level identifiers for VFS_GENERIC are given below; third
 302  * level identifiers for specific filesystems are given in their
 303  * mount specific header files.
 304  */
 305 #define VFS_MAXTYPENUM  1       /* int: highest defined filesystem type */
 306 #define VFS_CONF        2       /* struct: vfsconf for filesystem given
 307                                    as next argument */
 308 #define VFS_SET_PACKAGE_EXTS 3  /* set package extension list */
 309
 310 /*
 311  * Flags for various system call interfaces.
 312  *
 313  * waitfor flags to vfs_sync() and getfsstat()
 314  */
 315 #define MNT_WAIT        1       /* synchronously wait for I/O to complete */
 316 #define MNT_NOWAIT      2       /* start all I/O, but do not wait for it */
 317
 318
 319 #ifndef KERNEL
 320 struct mount;
 321 typedef struct mount * mount_t;
 322 struct vnode;
 323 typedef struct vnode * vnode_t;
 324 #endif
 325
 326 struct vfsconf {
 327         struct  vfsops *vfc_vfsops;     /* filesystem operations vector */
 328         char    vfc_name[MFSNAMELEN];   /* filesystem type name */
 329         int     vfc_typenum;            /* historic filesystem type number */
 330         int     vfc_refcount;           /* number mounted of this type */
 331         int     vfc_flags;              /* permanent flags */
 332         int     (*vfc_mountroot)(mount_t, vnode_t);     /* if != NULL, routine to mount root */
 333         struct  vfsconf *vfc_next;      /* next in list */
 334 };
 335
 336 struct vfsidctl {
 337         int             vc_vers;        /* should be VFSIDCTL_VERS1 (below) */
 338         fsid_t          vc_fsid;        /* fsid to operate on. */
 339         void            *vc_ptr;        /* pointer to data structure. */
 340         size_t          vc_len;         /* sizeof said structure. */
 341         u_int32_t       vc_spare[12];   /* spare (must be zero). */
 342 };
 343
 344
 345 /* vfsidctl API version. */
 346 #define VFS_CTL_VERS1   0x01
 347
 348 #ifdef KERNEL
 349 // LP64todo - should this move?
 350
 351 /* LP64 version of vfsconf.  all pointers
 352  * grow when we're dealing with a 64-bit process.
 353  * WARNING - keep in sync with vfsconf
 354  */
 355 #if __DARWIN_ALIGN_NATURAL
 356 #pragma options align=natural
 357 #endif
 358
 359 struct user_vfsconf {
 360        user_addr_t      vfc_vfsops;                             /* filesystem operations vector */
 361        char                     vfc_name[MFSNAMELEN];   /* filesystem type name */
 362        int                      vfc_typenum;            /* historic filesystem type number */
 363        int                      vfc_refcount;           /* number mounted of this type */
 364        int                      vfc_flags;                              /* permanent flags */
 365        user_addr_t      vfc_mountroot;          /* if != NULL, routine to mount root */
 366        user_addr_t      vfc_next;                               /* next in list */
 367 };
 368
 369 struct user_vfsidctl {
 370        int                              vc_vers;        /* should be VFSIDCTL_VERS1 (below) */
 371        fsid_t                   vc_fsid;                /* fsid to operate on. */
 372        user_addr_t              vc_ptr;                 /* pointer to data structure. */
 373        user_size_t              vc_len;                 /* sizeof said structure. */
 374        u_int32_t                vc_spare[12];   /* spare (must be zero). */
 375 };
 376
 377 #if __DARWIN_ALIGN_NATURAL
 378 #pragma options align=reset
 379 #endif
 380
 381 #endif /* KERNEL */
 382
 383 /*
 384  * New style VFS sysctls, do not reuse/conflict with the namespace for
 385  * private sysctls.
 386  */
 387 #define VFS_CTL_STATFS  0x00010001      /* statfs */
 388 #define VFS_CTL_UMOUNT  0x00010002      /* unmount */
 389 #define VFS_CTL_QUERY   0x00010003      /* anything wrong? (vfsquery) */
 390 #define VFS_CTL_NEWADDR 0x00010004      /* reconnect to new address */
 391 #define VFS_CTL_TIMEO   0x00010005      /* set timeout for vfs notification */
 392 #define VFS_CTL_NOLOCKS 0x00010006      /* disable file locking */
 393
 394 struct vfsquery {
 395         u_int32_t       vq_flags;
 396         u_int32_t       vq_spare[31];
 397 };
 398
 399 /* vfsquery flags */
 400 #define VQ_NOTRESP      0x0001  /* server down */
 401 #define VQ_NEEDAUTH     0x0002  /* server bad auth */
 402 #define VQ_LOWDISK      0x0004  /* we're low on space */
 403 #define VQ_MOUNT        0x0008  /* new filesystem arrived */
 404 #define VQ_UNMOUNT      0x0010  /* filesystem has left */
 405 #define VQ_DEAD         0x0020  /* filesystem is dead, needs force unmount */
 406 #define VQ_ASSIST       0x0040  /* filesystem needs assistance from external program */
 407 #define VQ_NOTRESPLOCK  0x0080  /* server lockd down */
 408 #define VQ_UPDATE       0x0100  /* filesystem information has changed */
 409 #define VQ_FLAG0200     0x0200  /* placeholder */
 410 #define VQ_FLAG0400     0x0400  /* placeholder */
 411 #define VQ_FLAG0800     0x0800  /* placeholder */
 412 #define VQ_FLAG1000     0x1000  /* placeholder */
 413 #define VQ_FLAG2000     0x2000  /* placeholder */
 414 #define VQ_FLAG4000     0x4000  /* placeholder */
 415 #define VQ_FLAG8000     0x8000  /* placeholder */
 416
 417
 418 #ifdef KERNEL
 419
 420 /* Structure for setting device IO parameters per mount point */
 421 struct vfsioattr {
 422         u_int32_t       io_maxreadcnt;          /* Max. byte count for read */
 423         u_int32_t       io_maxwritecnt;         /* Max. byte count for write */
 424         u_int32_t       io_segreadcnt;          /* Max. segment count for read */
 425         u_int32_t       io_segwritecnt;         /* Max. segment count for write */
 426         u_int32_t       io_maxsegreadsize;      /* Max. segment read size  */
 427         u_int32_t       io_maxsegwritesize;     /* Max. segment write size */
 428         u_int32_t       io_devblocksize;        /* the underlying device block size */
 429         void *          io_reserved[3];         /* extended attribute information */
 430 };
 431
 432
 433 /*
 434  * Filesystem Registration information
 435  */
 436
 437 #define VFS_TBLTHREADSAFE       0x01
 438 #define VFS_TBLFSNODELOCK       0x02
 439 #define VFS_TBLNOTYPENUM        0x08
 440 #define VFS_TBLLOCALVOL         0x10
 441 #define VFS_TBL64BITREADY       0x20
 442
 443 struct vfs_fsentry {
 444         struct vfsops * vfe_vfsops;     /* vfs operations */
 445         int             vfe_vopcnt;     /* # of vnodeopv_desc being registered (reg, spec, fifo ...) */
 446         struct vnodeopv_desc ** vfe_opvdescs; /* null terminated;  */
 447         int                     vfe_fstypenum;  /* historic filesystem type number */
 448         char            vfe_fsname[MFSNAMELEN]; /* filesystem type name */
 449         uint32_t        vfe_flags;              /* defines the FS capabilities */
 450     void *              vfe_reserv[2];  /* reserved for future use; set this to zero*/
 451  };
 452
 453
 454
 455 struct vfsops {
 456         int  (*vfs_mount)(struct mount *mp, vnode_t devvp, user_addr_t data, vfs_context_t context);
 457         int  (*vfs_start)(struct mount *mp, int flags, vfs_context_t context);
 458         int  (*vfs_unmount)(struct mount *mp, int mntflags, vfs_context_t context);
 459         int  (*vfs_root)(struct mount *mp, struct vnode **vpp, vfs_context_t context);
 460         int  (*vfs_quotactl)(struct mount *mp, int cmds, uid_t uid, caddr_t arg, vfs_context_t context);
 461         int  (*vfs_getattr)(struct mount *mp, struct vfs_attr *, vfs_context_t context);
 462 /*      int  (*vfs_statfs)(struct mount *mp, struct vfsstatfs *sbp, vfs_context_t context);*/
 463         int  (*vfs_sync)(struct mount *mp, int waitfor, vfs_context_t context);
 464         int  (*vfs_vget)(struct mount *mp, ino64_t ino, struct vnode **vpp, vfs_context_t context);
 465         int  (*vfs_fhtovp)(struct mount *mp, int fhlen, unsigned char *fhp, struct vnode **vpp,
 466                            vfs_context_t context);
 467         int  (*vfs_vptofh)(struct vnode *vp, int *fhlen, unsigned char *fhp, vfs_context_t context);
 468         int  (*vfs_init)(struct vfsconf *);
 469         int  (*vfs_sysctl)(int *, u_int, user_addr_t, size_t *, user_addr_t, size_t, vfs_context_t context);
 470         int  (*vfs_setattr)(struct mount *mp, struct vfs_attr *, vfs_context_t context);
 471         void *vfs_reserved[7];
 472 };
 473
 474
 475 /*
 476  * flags passed into vfs_iterate
 477  */
 478
 479 /*
 480  * return values from callback
 481  */
 482 #define VFS_RETURNED            0       /* done with vnode, reference can be dropped */
 483 #define VFS_RETURNED_DONE       1       /* done with vnode, reference can be dropped, terminate iteration */
 484 #define VFS_CLAIMED             2       /* don't drop reference */
 485 #define VFS_CLAIMED_DONE        3       /* don't drop reference, terminate iteration */
 486
 487
 488 __BEGIN_DECLS
 489 /*
 490  * prototypes for exported VFS operations
 491  */
 492 extern int VFS_MOUNT(mount_t, vnode_t, user_addr_t, vfs_context_t);
 493 extern int VFS_START(mount_t, int, vfs_context_t);
 494 extern int VFS_UNMOUNT(mount_t, int, vfs_context_t);
 495 extern int VFS_ROOT(mount_t, vnode_t *, vfs_context_t);
 496 extern int VFS_QUOTACTL(mount_t, int, uid_t, caddr_t, vfs_context_t);
 497 extern int VFS_SYNC(mount_t, int, vfs_context_t);
 498 extern int VFS_VGET(mount_t, ino64_t, vnode_t *, vfs_context_t);
 499 extern int VFS_FHTOVP(mount_t, int, unsigned char *, vnode_t *, vfs_context_t);
 500 extern int VFS_VPTOFH(vnode_t, int *, unsigned char *, vfs_context_t);
 501
 502 /* The file system registrartion KPI */
 503 int vfs_fsadd(struct vfs_fsentry *, vfstable_t *);
 504 int vfs_fsremove(vfstable_t);
 505 int     vfs_iterate(int, int (*)(struct mount *, void *), void *);
 506
 507 uint64_t vfs_flags(mount_t);
 508 void    vfs_setflags(mount_t, uint64_t);
 509 void    vfs_clearflags(mount_t, uint64_t);
 510
 511 int     vfs_issynchronous(mount_t);
 512 int     vfs_iswriteupgrade(mount_t);
 513 int     vfs_isupdate(mount_t);
 514 int     vfs_isreload(mount_t);
 515 int     vfs_isforce(mount_t);
 516 int     vfs_isrdonly(mount_t);
 517 int     vfs_isrdwr(mount_t);
 518 int     vfs_authopaque(mount_t);
 519 int     vfs_authopaqueaccess(mount_t);
 520 void    vfs_setauthopaque(mount_t);
 521 void    vfs_setauthopaqueaccess(mount_t);
 522 void    vfs_clearauthopaque(mount_t);
 523 void    vfs_clearauthopaqueaccess(mount_t);
 524 int     vfs_extendedsecurity(mount_t);
 525 void    vfs_setextendedsecurity(mount_t);
 526 void    vfs_clearextendedsecurity(mount_t);
 527 void    vfs_setlocklocal(mount_t);
 528
 529
 530
 531 uint32_t vfs_maxsymlen(mount_t);
 532 void    vfs_setmaxsymlen(mount_t, uint32_t);
 533 void *  vfs_fsprivate(mount_t);
 534 void    vfs_setfsprivate(mount_t, void *mntdata);
 535
 536 struct vfsstatfs *      vfs_statfs(mount_t);
 537 int     vfs_update_vfsstat(mount_t, vfs_context_t);
 538 int     vfs_getattr(mount_t mp, struct vfs_attr *vfa, vfs_context_t ctx);
 539 int     vfs_setattr(mount_t mp, struct vfs_attr *vfa, vfs_context_t ctx);
 540
 541 int     vfs_typenum(mount_t);
 542 void    vfs_name(mount_t, char *);
 543 int     vfs_devblocksize(mount_t);
 544 void    vfs_ioattr(mount_t, struct vfsioattr *);
 545 void    vfs_setioattr(mount_t, struct vfsioattr *);
 546 int     vfs_64bitready(mount_t);
 547
 548
 549 int     vfs_busy(mount_t, int);
 550 void    vfs_unbusy(mount_t);
 551
 552 void    vfs_getnewfsid(struct mount *);
 553 mount_t vfs_getvfs(fsid_t *);
 554 mount_t vfs_getvfs_by_mntonname(u_char *);
 555 int     vfs_mountedon(struct vnode *);
 556
 557 void    vfs_event_signal(fsid_t *, u_int32_t, intptr_t);
 558 void    vfs_event_init(void);
 559 __END_DECLS
 560
 561 #endif /* KERNEL */
 562
 563 #ifndef KERNEL
 564
 565 /*
 566  * Generic file handle
 567  */
 568 #define NFS_MAX_FH_SIZE         64
 569 #define NFSV2_MAX_FH_SIZE       32
 570 struct fhandle {
 571         int             fh_len;                         /* length of file handle */
 572         unsigned char   fh_data[NFS_MAX_FH_SIZE];       /* file handle value */
 573 };
 574 typedef struct fhandle  fhandle_t;
 575
 576
 577 __BEGIN_DECLS
 578 int     fhopen(const struct fhandle *, int);
 579 int     fstatfs(int, struct statfs *);
 580 int     getfh(const char *, fhandle_t *);
 581 int     getfsstat(struct statfs *, int, int);
 582 int     getmntinfo(struct statfs **, int);
 583 int     mount(const char *, const char *, int, void *);
 584 int     statfs(const char *, struct statfs *);
 585 int     unmount(const char *, int);
 586 int     getvfsbyname(const char *, struct vfsconf *);
 587 __END_DECLS
 588
 589 #endif /* KERNEL */
 590 #endif /* !_SYS_MOUNT_H_ */