bsd/sys/mount.h

   1 /*
   2  * Copyright (c) 2000-2005 Apple Computer, Inc. All rights reserved.
   3  *
   4  * @APPLE_LICENSE_HEADER_START@
   5  *
   6  * The contents of this file constitute Original Code as defined in and
   7  * are subject to the Apple Public Source License Version 1.1 (the
   8  * "License").  You may not use this file except in compliance with the
   9  * License.  Please obtain a copy of the License at
  10  * http://www.apple.com/publicsource and read it before using this file.
  11  *
  12  * This Original Code and all software distributed under the License are
  13  * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  14  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  15  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  16  * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT.  Please see the
  17  * License for the specific language governing rights and limitations
  18  * under the License.
  19  *
  20  * @APPLE_LICENSE_HEADER_END@
  21  */
  22 /* Copyright (c) 1995 NeXT Computer, Inc. All Rights Reserved */
  23 /*
  24  * Copyright (c) 1989, 1991, 1993
  25  *      The Regents of the University of California.  All rights reserved.
  26  *
  27  * Redistribution and use in source and binary forms, with or without
  28  * modification, are permitted provided that the following conditions
  29  * are met:
  30  * 1. Redistributions of source code must retain the above copyright
  31  *    notice, this list of conditions and the following disclaimer.
  32  * 2. Redistributions in binary form must reproduce the above copyright
  33  *    notice, this list of conditions and the following disclaimer in the
  34  *    documentation and/or other materials provided with the distribution.
  35  * 3. All advertising materials mentioning features or use of this software
  36  *    must display the following acknowledgement:
  37  *      This product includes software developed by the University of
  38  *      California, Berkeley and its contributors.
  39  * 4. Neither the name of the University nor the names of its contributors
  40  *    may be used to endorse or promote products derived from this software
  41  *    without specific prior written permission.
  42  *
  43  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  44  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  45  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  46  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  47  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  48  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  49  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  50  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  51  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  52  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  53  * SUCH DAMAGE.
  54  *
  55  *      @(#)mount.h     8.21 (Berkeley) 5/20/95
  56  */
  57
  58 #ifndef _SYS_MOUNT_H_
  59 #define _SYS_MOUNT_H_
  60
  61 #include <sys/appleapiopts.h>
  62 #include <sys/cdefs.h>
  63 #include <sys/attr.h>           /* needed for vol_capabilities_attr_t */
  64
  65 #ifndef KERNEL
  66 #include <stdint.h>
  67 #include <sys/ucred.h>
  68 #include <sys/queue.h>          /* XXX needed for user builds */
  69 #else
  70 #include <sys/kernel_types.h>
  71 #endif
  72
  73 typedef struct fsid { int32_t val[2]; } fsid_t; /* file system id type */
  74
  75 /*
  76  * file system statistics
  77  */
  78
  79 #define MFSNAMELEN      15      /* length of fs type name, not inc. null */
  80 #define MNAMELEN        90      /* length of buffer for returned name */
  81
  82 /*
  83  * LP64 - WARNING - must be kept in sync with struct user_statfs in mount_internal.h.
  84  */
  85 struct statfs {
  86         short   f_otype;                /* TEMPORARY SHADOW COPY OF f_type */
  87         short   f_oflags;               /* TEMPORARY SHADOW COPY OF f_flags */
  88         long    f_bsize;                /* fundamental file system block size */
  89         long    f_iosize;               /* optimal transfer block size */
  90         long    f_blocks;               /* total data blocks in file system */
  91         long    f_bfree;                /* free blocks in fs */
  92         long    f_bavail;               /* free blocks avail to non-superuser */
  93         long    f_files;                /* total file nodes in file system */
  94         long    f_ffree;                /* free file nodes in fs */
  95         fsid_t  f_fsid;                 /* file system id */
  96         uid_t   f_owner;                /* user that mounted the filesystem */
  97         short   f_reserved1;    /* spare for later */
  98         short   f_type;                 /* type of filesystem */
  99     long        f_flags;                /* copy of mount exported flags */
 100         long    f_reserved2[2]; /* reserved for future use */
 101         char    f_fstypename[MFSNAMELEN]; /* fs type name */
 102         char    f_mntonname[MNAMELEN];  /* directory on which mounted */
 103         char    f_mntfromname[MNAMELEN];/* mounted filesystem */
 104 #if COMPAT_GETFSSTAT
 105         char    f_reserved3[0]; /* For alignment */
 106         long    f_reserved4[0]; /* For future use */
 107 #else
 108         char    f_reserved3;    /* For alignment */
 109         long    f_reserved4[4]; /* For future use */
 110 #endif
 111 };
 112
 113
 114 #define MFSTYPENAMELEN  16      /* length of fs type name including null */
 115
 116 #if __DARWIN_ALIGN_POWER
 117 #pragma options align=power
 118 #endif
 119
 120 struct vfsstatfs {
 121         uint32_t        f_bsize;        /* fundamental file system block size */
 122         size_t          f_iosize;       /* optimal transfer block size */
 123         uint64_t        f_blocks;       /* total data blocks in file system */
 124         uint64_t        f_bfree;        /* free blocks in fs */
 125         uint64_t        f_bavail;       /* free blocks avail to non-superuser */
 126         uint64_t        f_bused;        /* free blocks avail to non-superuser */
 127         uint64_t        f_files;        /* total file nodes in file system */
 128         uint64_t        f_ffree;        /* free file nodes in fs */
 129         fsid_t          f_fsid;         /* file system id */
 130         uid_t           f_owner;        /* user that mounted the filesystem */
 131         uint64_t        f_flags;        /* copy of mount exported flags */
 132         char            f_fstypename[MFSTYPENAMELEN];/* fs type name inclus */
 133         char            f_mntonname[MAXPATHLEN];/* directory on which mounted */
 134         char            f_mntfromname[MAXPATHLEN];/* mounted filesystem */
 135         uint32_t        f_fssubtype;     /* fs sub-type (flavor) */
 136         void            *f_reserved[2];         /* For future use == 0 */
 137 };
 138
 139 #if __DARWIN_ALIGN_POWER
 140 #pragma options align=reset
 141 #endif
 142
 143 #define VFSATTR_INIT(s)                 ((s)->f_supported = (s)->f_active = 0LL)
 144 #define VFSATTR_SET_SUPPORTED(s, a)     ((s)->f_supported |= VFSATTR_ ## a)
 145 #define VFSATTR_IS_SUPPORTED(s, a)      ((s)->f_supported & VFSATTR_ ## a)
 146 #define VFSATTR_CLEAR_ACTIVE(s, a)      ((s)->f_active &= ~VFSATTR_ ## a)
 147 #define VFSATTR_IS_ACTIVE(s, a)         ((s)->f_active & VFSATTR_ ## a)
 148 #define VFSATTR_ALL_SUPPORTED(s)        (((s)->f_active & (s)->f_supported) == (s)->f_active)
 149 #define VFSATTR_WANTED(s, a)            ((s)->f_active |= VFSATTR_ ## a)
 150 #define VFSATTR_RETURN(s, a, x)         do { (s)-> a = (x); VFSATTR_SET_SUPPORTED(s, a);} while(0)
 151
 152 #define VFSATTR_f_objcount              (1LL<<  0)
 153 #define VFSATTR_f_filecount             (1LL<<  1)
 154 #define VFSATTR_f_dircount              (1LL<<  2)
 155 #define VFSATTR_f_maxobjcount           (1LL<<  3)
 156 #define VFSATTR_f_bsize                 (1LL<< 4)
 157 #define VFSATTR_f_iosize                (1LL<<  5)
 158 #define VFSATTR_f_blocks                (1LL<<  6)
 159 #define VFSATTR_f_bfree                 (1LL<<  7)
 160 #define VFSATTR_f_bavail                (1LL<<  8)
 161 #define VFSATTR_f_bused                 (1LL<<  9)
 162 #define VFSATTR_f_files                 (1LL<< 10)
 163 #define VFSATTR_f_ffree                 (1LL<< 11)
 164 #define VFSATTR_f_fsid                  (1LL<< 12)
 165 #define VFSATTR_f_owner                 (1LL<< 13)
 166 #define VFSATTR_f_capabilities          (1LL<< 14)
 167 #define VFSATTR_f_attributes            (1LL<< 15)
 168 #define VFSATTR_f_create_time           (1LL<< 16)
 169 #define VFSATTR_f_modify_time           (1LL<< 17)
 170 #define VFSATTR_f_access_time           (1LL<< 18)
 171 #define VFSATTR_f_backup_time           (1LL<< 19)
 172 #define VFSATTR_f_fssubtype             (1LL<< 20)
 173 #define VFSATTR_f_vol_name              (1LL<< 21)
 174 #define VFSATTR_f_signature             (1LL<< 22)
 175 #define VFSATTR_f_carbon_fsid           (1LL<< 23)
 176
 177 /*
 178  * New VFS_STAT argument structure.
 179  */
 180 #if __DARWIN_ALIGN_POWER
 181 #pragma options align=power
 182 #endif
 183
 184 struct vfs_attr {
 185         uint64_t        f_supported;
 186         uint64_t        f_active;
 187
 188         uint64_t        f_objcount;     /* number of filesystem objects in volume */
 189         uint64_t        f_filecount;    /* ... files */
 190         uint64_t        f_dircount;     /* ... directories */
 191         uint64_t        f_maxobjcount;  /* maximum number of filesystem objects */
 192
 193         uint32_t        f_bsize;        /* block size for the below size values */
 194         size_t          f_iosize;       /* optimal transfer block size */
 195         uint64_t        f_blocks;       /* total data blocks in file system */
 196         uint64_t        f_bfree;        /* free blocks in fs */
 197         uint64_t        f_bavail;       /* free blocks avail to non-superuser */
 198         uint64_t        f_bused;        /* blocks in use */
 199         uint64_t        f_files;        /* total file nodes in file system */
 200         uint64_t        f_ffree;        /* free file nodes in fs */
 201         fsid_t          f_fsid;         /* file system id */
 202         uid_t           f_owner;        /* user that mounted the filesystem */
 203
 204         vol_capabilities_attr_t f_capabilities;
 205         vol_attributes_attr_t f_attributes;
 206
 207         struct timespec f_create_time;  /* creation time */
 208         struct timespec f_modify_time;  /* last modification time */
 209         struct timespec f_access_time;  /* time of last access */
 210         struct timespec f_backup_time;  /* last backup time */
 211
 212         uint32_t        f_fssubtype;    /* filesystem subtype */
 213
 214         char            *f_vol_name;    /* volume name */
 215
 216         uint16_t        f_signature;    /* used for ATTR_VOL_SIGNATURE, Carbon's FSVolumeInfo.signature */
 217         uint16_t        f_carbon_fsid;  /* same as Carbon's FSVolumeInfo.filesystemID */
 218 };
 219
 220 #if __DARWIN_ALIGN_POWER
 221 #pragma options align=reset
 222 #endif
 223
 224 /*
 225  * User specifiable flags.
 226  *
 227  * Unmount uses MNT_FORCE flag.
 228  */
 229 #define MNT_RDONLY      0x00000001      /* read only filesystem */
 230 #define MNT_SYNCHRONOUS 0x00000002      /* file system written synchronously */
 231 #define MNT_NOEXEC      0x00000004      /* can't exec from filesystem */
 232 #define MNT_NOSUID      0x00000008      /* don't honor setuid bits on fs */
 233 #define MNT_NODEV       0x00000010      /* don't interpret special files */
 234 #define MNT_UNION       0x00000020      /* union with underlying filesystem */
 235 #define MNT_ASYNC       0x00000040      /* file system written asynchronously */
 236 #define MNT_DONTBROWSE  0x00100000      /* file system is not appropriate path to user data */
 237 #define MNT_IGNORE_OWNERSHIP 0x00200000 /* VFS will ignore ownership information on filesystem
 238                                          * objects */
 239 #define MNT_AUTOMOUNTED 0x00400000      /* filesystem was mounted by automounter */
 240 #define MNT_JOURNALED   0x00800000  /* filesystem is journaled */
 241 #define MNT_NOUSERXATTR 0x01000000      /* Don't allow user extended attributes */
 242 #define MNT_DEFWRITE    0x02000000      /* filesystem should defer writes */
 243
 244 /* backwards compatibility only */
 245 #define MNT_UNKNOWNPERMISSIONS MNT_IGNORE_OWNERSHIP
 246
 247 /*
 248  * NFS export related mount flags.
 249  */
 250 #define MNT_EXPORTED    0x00000100      /* file system is exported */
 251
 252 /*
 253  * Flags set by internal operations.
 254  */
 255 #define MNT_LOCAL       0x00001000      /* filesystem is stored locally */
 256 #define MNT_QUOTA       0x00002000      /* quotas are enabled on filesystem */
 257 #define MNT_ROOTFS      0x00004000      /* identifies the root filesystem */
 258 #define MNT_DOVOLFS     0x00008000      /* FS supports volfs */
 259
 260 /*
 261  * XXX I think that this could now become (~(MNT_CMDFLAGS))
 262  * but the 'mount' program may need changing to handle this.
 263  */
 264 #define MNT_VISFLAGMASK (MNT_RDONLY     | MNT_SYNCHRONOUS | MNT_NOEXEC  | \
 265                         MNT_NOSUID      | MNT_NODEV     | MNT_UNION     | \
 266                         MNT_ASYNC       | MNT_EXPORTED  | \
 267                         MNT_LOCAL       |               MNT_QUOTA       | \
 268                         MNT_ROOTFS      | MNT_DOVOLFS   | MNT_DONTBROWSE | \
 269                         MNT_UNKNOWNPERMISSIONS | MNT_AUTOMOUNTED | MNT_JOURNALED | \
 270                         MNT_DEFWRITE)
 271 /*
 272  * External filesystem command modifier flags.
 273  * Unmount can use the MNT_FORCE flag.
 274  * XXX These are not STATES and really should be somewhere else.
 275  * External filesystem control flags.
 276  */
 277 #define MNT_UPDATE      0x00010000      /* not a real mount, just an update */
 278 #define MNT_RELOAD      0x00040000      /* reload filesystem data */
 279 #define MNT_FORCE       0x00080000      /* force unmount or readonly change */
 280 #define MNT_CMDFLAGS    (MNT_UPDATE|MNT_RELOAD|MNT_FORCE)
 281
 282
 283
 284 /*
 285  * Sysctl CTL_VFS definitions.
 286  *
 287  * Second level identifier specifies which filesystem. Second level
 288  * identifier VFS_GENERIC returns information about all filesystems.
 289  */
 290 #define VFS_GENERIC             0       /* generic filesystem information */
 291 #define VFS_NUMMNTOPS           1       /* int: total num of vfs mount/unmount operations */
 292 /*
 293  * Third level identifiers for VFS_GENERIC are given below; third
 294  * level identifiers for specific filesystems are given in their
 295  * mount specific header files.
 296  */
 297 #define VFS_MAXTYPENUM  1       /* int: highest defined filesystem type */
 298 #define VFS_CONF        2       /* struct: vfsconf for filesystem given
 299                                    as next argument */
 300 #define VFS_SET_PACKAGE_EXTS 3  /* set package extension list */
 301
 302 /*
 303  * Flags for various system call interfaces.
 304  *
 305  * waitfor flags to vfs_sync() and getfsstat()
 306  */
 307 #define MNT_WAIT        1       /* synchronously wait for I/O to complete */
 308 #define MNT_NOWAIT      2       /* start all I/O, but do not wait for it */
 309
 310
 311 #ifndef KERNEL
 312 struct mount;
 313 typedef struct mount * mount_t;
 314 struct vnode;
 315 typedef struct vnode * vnode_t;
 316 #endif
 317
 318 struct vfsconf {
 319         struct  vfsops *vfc_vfsops;     /* filesystem operations vector */
 320         char    vfc_name[MFSNAMELEN];   /* filesystem type name */
 321         int     vfc_typenum;            /* historic filesystem type number */
 322         int     vfc_refcount;           /* number mounted of this type */
 323         int     vfc_flags;              /* permanent flags */
 324         int     (*vfc_mountroot)(mount_t, vnode_t);     /* if != NULL, routine to mount root */
 325         struct  vfsconf *vfc_next;      /* next in list */
 326 };
 327
 328 struct vfsidctl {
 329         int             vc_vers;        /* should be VFSIDCTL_VERS1 (below) */
 330         fsid_t          vc_fsid;        /* fsid to operate on. */
 331         void            *vc_ptr;        /* pointer to data structure. */
 332         size_t          vc_len;         /* sizeof said structure. */
 333         u_int32_t       vc_spare[12];   /* spare (must be zero). */
 334 };
 335
 336
 337 /* vfsidctl API version. */
 338 #define VFS_CTL_VERS1   0x01
 339
 340 #ifdef KERNEL
 341 // LP64todo - should this move?
 342
 343 /* LP64 version of vfsconf.  all pointers
 344  * grow when we're dealing with a 64-bit process.
 345  * WARNING - keep in sync with vfsconf
 346  */
 347 #if __DARWIN_ALIGN_NATURAL
 348 #pragma options align=natural
 349 #endif
 350
 351 struct user_vfsconf {
 352        user_addr_t      vfc_vfsops;                             /* filesystem operations vector */
 353        char                     vfc_name[MFSNAMELEN];   /* filesystem type name */
 354        int                      vfc_typenum;            /* historic filesystem type number */
 355        int                      vfc_refcount;           /* number mounted of this type */
 356        int                      vfc_flags;                              /* permanent flags */
 357        user_addr_t      vfc_mountroot;          /* if != NULL, routine to mount root */
 358        user_addr_t      vfc_next;                               /* next in list */
 359 };
 360
 361 struct user_vfsidctl {
 362        int                              vc_vers;        /* should be VFSIDCTL_VERS1 (below) */
 363        fsid_t                   vc_fsid;                /* fsid to operate on. */
 364        user_addr_t              vc_ptr;                 /* pointer to data structure. */
 365        user_size_t              vc_len;                 /* sizeof said structure. */
 366        u_int32_t                vc_spare[12];   /* spare (must be zero). */
 367 };
 368
 369 #if __DARWIN_ALIGN_NATURAL
 370 #pragma options align=reset
 371 #endif
 372
 373 #endif /* KERNEL */
 374
 375 /*
 376  * New style VFS sysctls, do not reuse/conflict with the namespace for
 377  * private sysctls.
 378  */
 379 #define VFS_CTL_STATFS  0x00010001      /* statfs */
 380 #define VFS_CTL_UMOUNT  0x00010002      /* unmount */
 381 #define VFS_CTL_QUERY   0x00010003      /* anything wrong? (vfsquery) */
 382 #define VFS_CTL_NEWADDR 0x00010004      /* reconnect to new address */
 383 #define VFS_CTL_TIMEO   0x00010005      /* set timeout for vfs notification */
 384 #define VFS_CTL_NOLOCKS 0x00010006      /* disable file locking */
 385
 386 struct vfsquery {
 387         u_int32_t       vq_flags;
 388         u_int32_t       vq_spare[31];
 389 };
 390
 391 /* vfsquery flags */
 392 #define VQ_NOTRESP      0x0001  /* server down */
 393 #define VQ_NEEDAUTH     0x0002  /* server bad auth */
 394 #define VQ_LOWDISK      0x0004  /* we're low on space */
 395 #define VQ_MOUNT        0x0008  /* new filesystem arrived */
 396 #define VQ_UNMOUNT      0x0010  /* filesystem has left */
 397 #define VQ_DEAD         0x0020  /* filesystem is dead, needs force unmount */
 398 #define VQ_ASSIST       0x0040  /* filesystem needs assistance from external program */
 399 #define VQ_NOTRESPLOCK  0x0080  /* server lockd down */
 400 #define VQ_UPDATE       0x0100  /* filesystem information has changed */
 401 #define VQ_FLAG0200     0x0200  /* placeholder */
 402 #define VQ_FLAG0400     0x0400  /* placeholder */
 403 #define VQ_FLAG0800     0x0800  /* placeholder */
 404 #define VQ_FLAG1000     0x1000  /* placeholder */
 405 #define VQ_FLAG2000     0x2000  /* placeholder */
 406 #define VQ_FLAG4000     0x4000  /* placeholder */
 407 #define VQ_FLAG8000     0x8000  /* placeholder */
 408
 409
 410 #ifdef KERNEL
 411
 412 /* Structure for setting device IO parameters per mount point */
 413 struct vfsioattr {
 414         u_int32_t       io_maxreadcnt;          /* Max. byte count for read */
 415         u_int32_t       io_maxwritecnt;         /* Max. byte count for write */
 416         u_int32_t       io_segreadcnt;          /* Max. segment count for read */
 417         u_int32_t       io_segwritecnt;         /* Max. segment count for write */
 418         u_int32_t       io_maxsegreadsize;      /* Max. segment read size  */
 419         u_int32_t       io_maxsegwritesize;     /* Max. segment write size */
 420         u_int32_t       io_devblocksize;        /* the underlying device block size */
 421         void *          io_reserved[3];         /* extended attribute information */
 422 };
 423
 424
 425 /*
 426  * Filesystem Registration information
 427  */
 428
 429 #define VFS_TBLTHREADSAFE       0x01
 430 #define VFS_TBLFSNODELOCK       0x02
 431 #define VFS_TBLNOTYPENUM        0x08
 432 #define VFS_TBLLOCALVOL         0x10
 433 #define VFS_TBL64BITREADY       0x20
 434
 435 struct vfs_fsentry {
 436         struct vfsops * vfe_vfsops;     /* vfs operations */
 437         int             vfe_vopcnt;     /* # of vnodeopv_desc being registered (reg, spec, fifo ...) */
 438         struct vnodeopv_desc ** vfe_opvdescs; /* null terminated;  */
 439         int                     vfe_fstypenum;  /* historic filesystem type number */
 440         char            vfe_fsname[MFSNAMELEN]; /* filesystem type name */
 441         uint32_t        vfe_flags;              /* defines the FS capabilities */
 442     void *              vfe_reserv[2];  /* reserved for future use; set this to zero*/
 443  };
 444
 445
 446
 447 struct vfsops {
 448         int  (*vfs_mount)(struct mount *mp, vnode_t devvp, user_addr_t data, vfs_context_t context);
 449         int  (*vfs_start)(struct mount *mp, int flags, vfs_context_t context);
 450         int  (*vfs_unmount)(struct mount *mp, int mntflags, vfs_context_t context);
 451         int  (*vfs_root)(struct mount *mp, struct vnode **vpp, vfs_context_t context);
 452         int  (*vfs_quotactl)(struct mount *mp, int cmds, uid_t uid, caddr_t arg, vfs_context_t context);
 453         int  (*vfs_getattr)(struct mount *mp, struct vfs_attr *, vfs_context_t context);
 454 /*      int  (*vfs_statfs)(struct mount *mp, struct vfsstatfs *sbp, vfs_context_t context);*/
 455         int  (*vfs_sync)(struct mount *mp, int waitfor, vfs_context_t context);
 456         int  (*vfs_vget)(struct mount *mp, ino64_t ino, struct vnode **vpp, vfs_context_t context);
 457         int  (*vfs_fhtovp)(struct mount *mp, int fhlen, unsigned char *fhp, struct vnode **vpp,
 458                            vfs_context_t context);
 459         int  (*vfs_vptofh)(struct vnode *vp, int *fhlen, unsigned char *fhp, vfs_context_t context);
 460         int  (*vfs_init)(struct vfsconf *);
 461         int  (*vfs_sysctl)(int *, u_int, user_addr_t, size_t *, user_addr_t, size_t, vfs_context_t context);
 462         int  (*vfs_setattr)(struct mount *mp, struct vfs_attr *, vfs_context_t context);
 463         void *vfs_reserved[7];
 464 };
 465
 466
 467 /*
 468  * flags passed into vfs_iterate
 469  */
 470
 471 /*
 472  * return values from callback
 473  */
 474 #define VFS_RETURNED            0       /* done with vnode, reference can be dropped */
 475 #define VFS_RETURNED_DONE       1       /* done with vnode, reference can be dropped, terminate iteration */
 476 #define VFS_CLAIMED             2       /* don't drop reference */
 477 #define VFS_CLAIMED_DONE        3       /* don't drop reference, terminate iteration */
 478
 479
 480 __BEGIN_DECLS
 481 /*
 482  * prototypes for exported VFS operations
 483  */
 484 extern int VFS_MOUNT(mount_t, vnode_t, user_addr_t, vfs_context_t);
 485 extern int VFS_START(mount_t, int, vfs_context_t);
 486 extern int VFS_UNMOUNT(mount_t, int, vfs_context_t);
 487 extern int VFS_ROOT(mount_t, vnode_t *, vfs_context_t);
 488 extern int VFS_QUOTACTL(mount_t, int, uid_t, caddr_t, vfs_context_t);
 489 extern int VFS_SYNC(mount_t, int, vfs_context_t);
 490 extern int VFS_VGET(mount_t, ino64_t, vnode_t *, vfs_context_t);
 491 extern int VFS_FHTOVP(mount_t, int, unsigned char *, vnode_t *, vfs_context_t);
 492 extern int VFS_VPTOFH(vnode_t, int *, unsigned char *, vfs_context_t);
 493
 494 /* The file system registrartion KPI */
 495 int vfs_fsadd(struct vfs_fsentry *, vfstable_t *);
 496 int vfs_fsremove(vfstable_t);
 497 int     vfs_iterate(int, int (*)(struct mount *, void *), void *);
 498
 499 uint64_t vfs_flags(mount_t);
 500 void    vfs_setflags(mount_t, uint64_t);
 501 void    vfs_clearflags(mount_t, uint64_t);
 502
 503 int     vfs_issynchronous(mount_t);
 504 int     vfs_iswriteupgrade(mount_t);
 505 int     vfs_isupdate(mount_t);
 506 int     vfs_isreload(mount_t);
 507 int     vfs_isforce(mount_t);
 508 int     vfs_isrdonly(mount_t);
 509 int     vfs_isrdwr(mount_t);
 510 int     vfs_authopaque(mount_t);
 511 int     vfs_authopaqueaccess(mount_t);
 512 void    vfs_setauthopaque(mount_t);
 513 void    vfs_setauthopaqueaccess(mount_t);
 514 void    vfs_clearauthopaque(mount_t);
 515 void    vfs_clearauthopaqueaccess(mount_t);
 516 int     vfs_extendedsecurity(mount_t);
 517 void    vfs_setextendedsecurity(mount_t);
 518 void    vfs_clearextendedsecurity(mount_t);
 519 void    vfs_setlocklocal(mount_t);
 520
 521
 522
 523 uint32_t vfs_maxsymlen(mount_t);
 524 void    vfs_setmaxsymlen(mount_t, uint32_t);
 525 void *  vfs_fsprivate(mount_t);
 526 void    vfs_setfsprivate(mount_t, void *mntdata);
 527
 528 struct vfsstatfs *      vfs_statfs(mount_t);
 529 int     vfs_update_vfsstat(mount_t, vfs_context_t);
 530 int     vfs_getattr(mount_t mp, struct vfs_attr *vfa, vfs_context_t ctx);
 531 int     vfs_setattr(mount_t mp, struct vfs_attr *vfa, vfs_context_t ctx);
 532
 533 int     vfs_typenum(mount_t);
 534 void    vfs_name(mount_t, char *);
 535 int     vfs_devblocksize(mount_t);
 536 void    vfs_ioattr(mount_t, struct vfsioattr *);
 537 void    vfs_setioattr(mount_t, struct vfsioattr *);
 538 int     vfs_64bitready(mount_t);
 539
 540
 541 int     vfs_busy(mount_t, int);
 542 void    vfs_unbusy(mount_t);
 543
 544 void    vfs_getnewfsid(struct mount *);
 545 mount_t vfs_getvfs(fsid_t *);
 546 mount_t vfs_getvfs_by_mntonname(u_char *);
 547 int     vfs_mountedon(struct vnode *);
 548
 549 void    vfs_event_signal(fsid_t *, u_int32_t, intptr_t);
 550 void    vfs_event_init(void);
 551 __END_DECLS
 552
 553 #endif /* KERNEL */
 554
 555 #ifndef KERNEL
 556
 557 /*
 558  * Generic file handle
 559  */
 560 #define NFS_MAX_FH_SIZE         64
 561 #define NFSV2_MAX_FH_SIZE       32
 562 struct fhandle {
 563         int             fh_len;                         /* length of file handle */
 564         unsigned char   fh_data[NFS_MAX_FH_SIZE];       /* file handle value */
 565 };
 566 typedef struct fhandle  fhandle_t;
 567
 568
 569 __BEGIN_DECLS
 570 int     fhopen(const struct fhandle *, int);
 571 int     fstatfs(int, struct statfs *);
 572 int     getfh(const char *, fhandle_t *);
 573 int     getfsstat(struct statfs *, int, int);
 574 int     getmntinfo(struct statfs **, int);
 575 int     mount(const char *, const char *, int, void *);
 576 int     statfs(const char *, struct statfs *);
 577 int     unmount(const char *, int);
 578 int     getvfsbyname(const char *, struct vfsconf *);
 579 __END_DECLS
 580
 581 #endif /* KERNEL */
 582 #endif /* !_SYS_MOUNT_H_ */