device-mapper-dmsetup-export.patch

   1 ---
   2  man/dmsetup.8.in |    7 ++++
   3  tools/dmsetup.c  |   88 +++++++++++++++++++++++++++++++++++++++++++++++++++++++
   4  2 files changed, 95 insertions(+)
   5
   6 Index: LVM2.2.02.98/man/dmsetup.8.in
   7 ===================================================================
   8 --- LVM2.2.02.116.orig/man/dmsetup.8.in 2015-01-30 16:19:53.000000000 +0000
   9 +++ LVM2.2.02.116/man/dmsetup.8.in      2015-02-03 21:05:01.635601115 +0000
  10 @@ -48,6 +48,14 @@ dmsetup \(em low level logical volume ma
  11  .
  12  .HP
  13  .B dmsetup
  14 +.de CMD_EXPORT
  15 +.  BR export
  16 +.  RI [ device_name ]
  17 +..
  18 +.CMD_EXPORT
  19 +.
  20 +.HP
  21 +.B dmsetup
  22  .de CMD_HELP
  23  .  BR help
  24  .  RB [ \-c | \-C | \-\-columns ]
  25 @@ -629,6 +637,11 @@ device. Device names on output can be cu
  26  \fBdevname\fP (map name for device-mapper devices, equal to blkdevname otherwise).
  27  .
  28  .HP
  29 +.CMD_EXPORT
  30 +.br
  31 +Outputs information in key/value format to be imported by other programs.
  32 +.
  33 +.HP
  34  .CMD_HELP
  35  .br
  36  Outputs a summary of the commands available, optionally including
  37 Index: LVM2.2.02.98/tools/dmsetup.c
  38 ===================================================================
  39 --- LVM2.2.02.98.orig/tools/dmsetup.c
  40 +++ LVM2.2.02.98/tools/dmsetup.c
  41 @@ -2194,6 +2194,93 @@ out:
  42         return r;
  43  }
  44
  45 +static int _export(CMD_ARGS)
  46 +{
  47 +       int r = 0;
  48 +       struct dm_task *dmt = NULL;
  49 +       void *next = NULL;
  50 +       uint64_t start, length;
  51 +       char *target_type = NULL;
  52 +       char *params;
  53 +       const char *name = NULL;
  54 +       const char *uuid = NULL;
  55 +       struct dm_info info;
  56 +
  57 +       if (names)
  58 +               name = names->name;
  59 +       else if (argc == 2)
  60 +               name = argv[1];
  61 +
  62 +       if (!(dmt = dm_task_create(DM_DEVICE_STATUS)))
  63 +               goto out;
  64 +
  65 +       if (!_set_task_device(dmt, name, 0))
  66 +               goto out;
  67 +
  68 +       if (!dm_task_run(dmt))
  69 +               goto out;
  70 +
  71 +       if (!dm_task_get_info(dmt, &info) || !info.exists)
  72 +               goto out;
  73 +
  74 +       if (!name)
  75 +               name = dm_task_get_name(dmt);
  76 +
  77 +       uuid = dm_task_get_uuid(dmt);
  78 +       printf("DM_NAME=%s\n", name);
  79 +
  80 +       if ((uuid = dm_task_get_uuid(dmt)) && *uuid)
  81 +               printf("DM_UUID=%s\n", uuid);
  82 +
  83 +       if (!info.exists) {
  84 +               printf("DM_STATE=NOTPRESENT\n");
  85 +               goto out;
  86 +       }
  87 +
  88 +       printf("DM_STATE=%s\n",
  89 +              info.suspended ? "SUSPENDED" :
  90 +              (info.read_only ? "READONLY" : "ACTIVE"));
  91 +
  92 +       if (!info.live_table && !info.inactive_table)
  93 +               printf("DM_TABLE_STATE=NONE\n");
  94 +       else
  95 +               printf("DM_TABLE_STATE=%s%s%s\n",
  96 +                      info.live_table ? "LIVE" : "",
  97 +                      info.live_table && info.inactive_table ? "/" : "",
  98 +                      info.inactive_table ? "INACTIVE" : "");
  99 +
 100 +       if (info.open_count != -1)
 101 +               printf("DM_OPENCOUNT=%d\n", info.open_count);
 102 +
 103 +       printf("DM_LAST_EVENT_NR=%" PRIu32 "\n", info.event_nr);
 104 +
 105 +       printf("DM_MAJOR=%d\n", info.major);
 106 +       printf("DM_MINOR=%d\n", info.minor);
 107 +
 108 +       if (info.target_count != -1)
 109 +               printf("DM_TARGET_COUNT=%d\n", info.target_count);
 110 +
 111 +       /* export all table types */
 112 +       next = dm_get_next_target(dmt, next, &start, &length,
 113 +                                 &target_type, &params);
 114 +       if (target_type) {
 115 +               printf("DM_TARGET_TYPES=%s", target_type);
 116 +               while (next) {
 117 +                       next = dm_get_next_target(dmt, next, &start, &length,
 118 +                                                 &target_type, &params);
 119 +                       if (target_type)
 120 +                               printf(",%s", target_type);
 121 +               }
 122 +               printf("\n");
 123 +       }
 124 +
 125 +       r = 1;
 126 +      out:
 127 +       if (dmt)
 128 +               dm_task_destroy(dmt);
 129 +       return r;
 130 +}
 131 +
 132  /* Show target names and their version numbers */
 133  static int _targets(CMD_ARGS)
 134  {
 135 @@ -5155,6 +5242,7 @@ static struct command _dmsetup_commands[
 136         {"deps", "[-o <options>] [<device>]", 0, -1, 1, 0, _deps},
 137         {"stats", "<command> [<options>] [<devices>]", 1, -1, 1, 1, _stats},
 138         {"status", "[<device>] [--noflush] [--target <target_type>]", 0, -1, 1, 0, _status},
 139 +       {"export", "[<device>]", 0, 1, 1, 0, _export},
 140         {"table", "[<device>] [--target <target_type>] [--showkeys]", 0, -1, 1, 0, _status},
 141         {"wait", "<device> [<event_nr>] [--noflush]", 0, 2, 0, 0, _wait},
 142         {"mknodes", "[<device>]", 0, -1, 1, 0, _mknodes},