sys/sys/vfscache.h

   1 /*
   2  * Copyright (c) 2004 The DragonFly Project.  All rights reserved.
   3  *
   4  * This code is derived from software contributed to The DragonFly Project
   5  * by Matthew Dillon <dillon@backplane.com>
   6  *
   7  * Redistribution and use in source and binary forms, with or without
   8  * modification, are permitted provided that the following conditions
   9  * are met:
  10  *
  11  * 1. Redistributions of source code must retain the above copyright
  12  *    notice, this list of conditions and the following disclaimer.
  13  * 2. Redistributions in binary form must reproduce the above copyright
  14  *    notice, this list of conditions and the following disclaimer in
  15  *    the documentation and/or other materials provided with the
  16  *    distribution.
  17  * 3. Neither the name of The DragonFly Project nor the names of its
  18  *    contributors may be used to endorse or promote products derived
  19  *    from this software without specific, prior written permission.
  20  *
  21  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  22  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  23  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
  24  * FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE
  25  * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
  26  * INCIDENTAL, SPECIAL, EXEMPLARY OR CONSEQUENTIAL DAMAGES (INCLUDING,
  27  * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  28  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
  29  * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
  30  * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
  31  * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  32  * SUCH DAMAGE.
  33  *
  34  *
  35  * Copyright (c) 1989, 1993
  36  *      The Regents of the University of California.  All rights reserved.
  37  *
  38  * Redistribution and use in source and binary forms, with or without
  39  * modification, are permitted provided that the following conditions
  40  * are met:
  41  * 1. Redistributions of source code must retain the above copyright
  42  *    notice, this list of conditions and the following disclaimer.
  43  * 2. Redistributions in binary form must reproduce the above copyright
  44  *    notice, this list of conditions and the following disclaimer in the
  45  *    documentation and/or other materials provided with the distribution.
  46  * 3. Neither the name of the University nor the names of its contributors
  47  *    may be used to endorse or promote products derived from this software
  48  *    without specific prior written permission.
  49  *
  50  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  51  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  52  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  53  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  54  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  55  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  56  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  57  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  58  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  59  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  60  * SUCH DAMAGE.
  61  */
  62 /*
  63  * This module serves as a focal point for virtually all filesystem and
  64  * device related calls.  It is or will be responsible for all high level
  65  * kernel management for filesystem and device operations, including but
  66  * limited to:
  67  *
  68  *      Function                        Status
  69  *      ----------------                -----
  70  *      Journaling                      TODO
  71  *      Range Locking                   TODO
  72  *      Cache Coherency                 TODO
  73  *      VNode Operations Dispatch       TODO
  74  *      Mount Point Operations          TODO
  75  *      FileOps Operations              TODO
  76  */
  77
  78 #ifndef _SYS_VFSCACHE_H_
  79 #define _SYS_VFSCACHE_H_
  80
  81 #ifndef _SYS_TYPES_H_
  82 #include <sys/types.h>
  83 #endif
  84 #ifndef _SYS_TIME_H_
  85 #include <sys/time.h>
  86 #endif
  87 #ifndef _SYS_VFSOPS_H_
  88 #include <sys/vfsops.h>
  89 #endif
  90 #ifndef _SYS_UUID_H_
  91 #include <sys/uuid.h>
  92 #endif
  93
  94 /*
  95  * Vnode types.  VNON means no type or transitory type.  VINT is used
  96  * for internal types.  Note that VNON is skipped by the vnode scan.
  97  */
  98 enum vtype      { VNON, VREG, VDIR, VBLK, VCHR, VLNK, VSOCK, VFIFO, VBAD,
  99                   VDATABASE, VINT };
 100
 101 /*
 102  * Vnode tag types.
 103  * These are for the benefit of external programs only (e.g., pstat)
 104  * and should NEVER be inspected by the kernel.
 105  */
 106 enum vtagtype   {
 107         VT_NON, VT_UFS, VT_NFS, VT_MFS, VT_UNUSED4, VT_UNUSED5, VT_UNUSED6,
 108         VT_UNUSED7, VT_UNUSED8, VT_NULL, VT_UNUSED10, VT_UNUSED11, VT_PROCFS,
 109         VT_UNUSED13, VT_ISOFS, VT_UNUSED15, VT_MSDOSFS, VT_UNUSED17, VT_VFS,
 110         VT_UNUSED19, VT_NTFS, VT_HPFS, VT_SMBFS, VT_UDF, VT_EXT2FS, VT_SYNTH,
 111         VT_HAMMER, VT_HAMMER2, VT_DEVFS, VT_TMPFS, VT_AUTOFS
 112 };
 113
 114 /*
 115  * Vnode attributes.  A field value of VNOVAL represents a field whose value
 116  * is unavailable (getattr) or which is not to be changed (setattr).
 117  *
 118  * Some vattr fields may be wider then what is reported to userland.
 119  */
 120 struct vattr {
 121         enum vtype      va_type;        /* vnode type (for create) */
 122         u_int64_t       va_nlink;       /* number of references to file */
 123         u_short         va_mode;        /* files access mode and type */
 124         uid_t           va_uid;         /* owner user id */
 125         gid_t           va_gid;         /* owner group id */
 126         udev_t          va_fsid;        /* file system id */
 127         ino_t           va_fileid;      /* file id */
 128         u_quad_t        va_size;        /* file size in bytes */
 129         long            va_blocksize;   /* blocksize preferred for i/o */
 130         struct timespec va_atime;       /* time of last access */
 131         struct timespec va_mtime;       /* time of last modification */
 132         struct timespec va_ctime;       /* time file changed */
 133         u_int64_t       va_gen;         /* generation number of file */
 134         u_long          va_flags;       /* flags defined for file */
 135         int             va_rmajor;      /* device the special file represents */
 136         int             va_rminor;
 137         u_quad_t        va_bytes;       /* bytes of disk space held by file */
 138         u_quad_t        va_filerev;     /* file modification number */
 139         u_int           va_vaflags;     /* operations flags, see below */
 140         long            va_spare;       /* remain quad aligned */
 141         int64_t         va_unused01;
 142         uuid_t          va_uid_uuid;    /* native uuids if available */
 143         uuid_t          va_gid_uuid;
 144         uuid_t          va_fsid_uuid;
 145 };
 146
 147 /*
 148  * Flags for va_vaflags.
 149  *
 150  * NOTE: The short versions for the uid, gid, and fsid are always populated
 151  * even when the uuid versions are available.
 152  */
 153 #define VA_UTIMES_NULL          0x0001  /* utimes argument was NULL */
 154 #define VA_EXCLUSIVE            0x0002  /* exclusive create request */
 155 #define VA_UID_UUID_VALID       0x0004  /* uuid fields also populated */
 156 #define VA_GID_UUID_VALID       0x0008  /* uuid fields also populated */
 157 #define VA_FSID_UUID_VALID      0x0010  /* uuid fields also populated */
 158
 159 #endif
 160