Unix/ventoy_unix_src/FreeBSD/geom_ventoy_src/9.x/sys/geom/ventoy/g_ventoy.h

   1 /*-
   2  * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
   3  *
   4  * Copyright (c) 2020 longpanda <admin@ventoy.net>
   5  * Copyright (c) 2004-2005 Pawel Jakub Dawidek <pjd@FreeBSD.org>
   6  * All rights reserved.
   7  *
   8  * Redistribution and use in source and binary forms, with or without
   9  * modification, are permitted provided that the following conditions
  10  * are met:
  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 the
  15  *    documentation and/or other materials provided with the distribution.
  16  *
  17  * THIS SOFTWARE IS PROVIDED BY THE AUTHORS AND CONTRIBUTORS ``AS IS'' AND
  18  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  19  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  20  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE LIABLE
  21  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  22  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  23  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  24  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  25  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  26  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  27  * SUCH DAMAGE.
  28  *
  29  * $FreeBSD$
  30  */
  31
  32 #ifndef _G_VENTOY_H_
  33 #define _G_VENTOY_H_
  34
  35 #include <sys/endian.h>
  36
  37 #define G_VENTOY_CLASS_NAME     "VENTOY"
  38
  39 #define G_VENTOY_MAGIC          "GEOM::VENTOY"
  40 /*
  41  * Version history:
  42  * 1 - Initial version number.
  43  * 2 - Added 'stop' command to gconcat(8).
  44  * 3 - Added md_provider field to metadata and '-h' option to gconcat(8).
  45  * 4 - Added md_provsize field to metadata.
  46  */
  47 #define G_VENTOY_VERSION        4
  48
  49 #ifdef _KERNEL
  50 #define G_VENTOY_TYPE_MANUAL    0
  51 #define G_VENTOY_TYPE_AUTOMATIC 1
  52
  53 #define G_DEBUG(...) if (bootverbose) printf(__VA_ARGS__)
  54 #define G_VENTOY_DEBUG(lvl, ...) if (g_ventoy_debug) printf(__VA_ARGS__)
  55 #define G_VENTOY_LOGREQ(bp, ...) if (g_ventoy_debug) printf(__VA_ARGS__)
  56
  57 struct g_ventoy_disk {
  58         struct g_consumer       *d_consumer;
  59         struct g_ventoy_softc   *d_softc;
  60         off_t                    d_start;
  61         off_t                    d_end;
  62     off_t                        d_map_start;
  63     off_t                        d_map_end;
  64         int                      d_candelete;
  65         int                      d_removed;
  66 };
  67
  68 struct g_ventoy_softc {
  69         u_int            sc_type;       /* provider type */
  70         struct g_geom   *sc_geom;
  71         struct g_provider *sc_provider;
  72         uint32_t         sc_id;         /* concat unique ID */
  73
  74         struct g_ventoy_disk *sc_disks;
  75         uint16_t         sc_ndisks;
  76         struct mtx       sc_lock;
  77 };
  78 #define sc_name sc_geom->name
  79 #endif  /* _KERNEL */
  80
  81 struct g_ventoy_metadata {
  82         char            md_magic[16];   /* Magic value. */
  83         uint32_t        md_version;     /* Version number. */
  84         char            md_name[16];    /* Concat name. */
  85         uint32_t        md_id;          /* Unique ID. */
  86         uint16_t        md_no;          /* Disk number. */
  87         uint16_t        md_all;         /* Number of all disks. */
  88         char            md_provider[16]; /* Hardcoded provider. */
  89         uint64_t        md_provsize;    /* Provider's size. */
  90 };
  91 static __inline void
  92 ventoy_metadata_encode(const struct g_ventoy_metadata *md, u_char *data)
  93 {
  94
  95         bcopy(md->md_magic, data, sizeof(md->md_magic));
  96         le32enc(data + 16, md->md_version);
  97         bcopy(md->md_name, data + 20, sizeof(md->md_name));
  98         le32enc(data + 36, md->md_id);
  99         le16enc(data + 40, md->md_no);
 100         le16enc(data + 42, md->md_all);
 101         bcopy(md->md_provider, data + 44, sizeof(md->md_provider));
 102         le64enc(data + 60, md->md_provsize);
 103 }
 104 static __inline void
 105 ventoy_metadata_decode(const u_char *data, struct g_ventoy_metadata *md)
 106 {
 107
 108         bcopy(data, md->md_magic, sizeof(md->md_magic));
 109         md->md_version = le32dec(data + 16);
 110         bcopy(data + 20, md->md_name, sizeof(md->md_name));
 111         md->md_id = le32dec(data + 36);
 112         md->md_no = le16dec(data + 40);
 113         md->md_all = le16dec(data + 42);
 114         bcopy(data + 44, md->md_provider, sizeof(md->md_provider));
 115         md->md_provsize = le64dec(data + 60);
 116 }
 117 #endif  /* _G_VENTOY_H_ */