device-mapper-dmsetup-export.patch

   1 diff -urp LVM2.2.02.179.orig/man/dmsetup.8_main LVM2.2.02.179/man/dmsetup.8_main
   2 --- LVM2.2.02.179.orig/man/dmsetup.8_main       2018-06-26 11:40:19.080841000 +0000
   3 +++ LVM2.2.02.179/man/dmsetup.8_main    2018-06-26 11:46:19.184819536 +0000
   4 @@ -59,6 +59,14 @@ dmsetup \(em low level logical volume ma
   5  .
   6  .HP
   7  .B dmsetup
   8 +.de CMD_EXPORT
   9 +.  BR export
  10 +.  RI [ device_name ]
  11 +..
  12 +.CMD_EXPORT
  13 +.
  14 +.HP
  15 +.B dmsetup
  16  .de CMD_HELP
  17  .  BR help
  18  .  RB [ -c | -C | --columns ]
  19 @@ -651,6 +659,9 @@ device. Device names on output can be cu
  20  \fBdevname\fP (map name for device-mapper devices, equal to blkdevname otherwise).
  21  .
  22  .HP
  23 +.CMD_EXPORT
  24 +Outputs information in key/value format to be imported by other programs.
  25 +.HP
  26  .CMD_HELP
  27  .br
  28  Outputs a summary of the commands available, optionally including
  29 diff -urp LVM2.2.02.179.orig/tools/dmsetup.c LVM2.2.02.179/tools/dmsetup.c
  30 --- LVM2.2.02.179.orig/tools/dmsetup.c  2018-06-26 11:40:23.358840745 +0000
  31 +++ LVM2.2.02.179/tools/dmsetup.c       2018-06-26 11:46:19.185819536 +0000
  32 @@ -2568,6 +2568,93 @@ out:
  33         return r;
  34  }
  35
  36 +static int _export(CMD_ARGS)
  37 +{
  38 +       int r = 0;
  39 +       struct dm_task *dmt = NULL;
  40 +       void *next = NULL;
  41 +       uint64_t start, length;
  42 +       char *target_type = NULL;
  43 +       char *params;
  44 +       const char *name = NULL;
  45 +       const char *uuid = NULL;
  46 +       struct dm_info info;
  47 +
  48 +       if (names)
  49 +               name = names->name;
  50 +       else if (argc == 2)
  51 +               name = argv[1];
  52 +
  53 +       if (!(dmt = dm_task_create(DM_DEVICE_STATUS)))
  54 +               goto out;
  55 +
  56 +       if (!_set_task_device(dmt, name, 0))
  57 +               goto out;
  58 +
  59 +       if (!dm_task_run(dmt))
  60 +               goto out;
  61 +
  62 +       if (!dm_task_get_info(dmt, &info) || !info.exists)
  63 +               goto out;
  64 +
  65 +       if (!name)
  66 +               name = dm_task_get_name(dmt);
  67 +
  68 +       uuid = dm_task_get_uuid(dmt);
  69 +       printf("DM_NAME=%s\n", name);
  70 +
  71 +       if ((uuid = dm_task_get_uuid(dmt)) && *uuid)
  72 +               printf("DM_UUID=%s\n", uuid);
  73 +
  74 +       if (!info.exists) {
  75 +               printf("DM_STATE=NOTPRESENT\n");
  76 +               goto out;
  77 +       }
  78 +
  79 +       printf("DM_STATE=%s\n",
  80 +              info.suspended ? "SUSPENDED" :
  81 +              (info.read_only ? "READONLY" : "ACTIVE"));
  82 +
  83 +       if (!info.live_table && !info.inactive_table)
  84 +               printf("DM_TABLE_STATE=NONE\n");
  85 +       else
  86 +               printf("DM_TABLE_STATE=%s%s%s\n",
  87 +                      info.live_table ? "LIVE" : "",
  88 +                      info.live_table && info.inactive_table ? "/" : "",
  89 +                      info.inactive_table ? "INACTIVE" : "");
  90 +
  91 +       if (info.open_count != -1)
  92 +               printf("DM_OPENCOUNT=%d\n", info.open_count);
  93 +
  94 +       printf("DM_LAST_EVENT_NR=%" PRIu32 "\n", info.event_nr);
  95 +
  96 +       printf("DM_MAJOR=%d\n", info.major);
  97 +       printf("DM_MINOR=%d\n", info.minor);
  98 +
  99 +       if (info.target_count != -1)
 100 +               printf("DM_TARGET_COUNT=%d\n", info.target_count);
 101 +
 102 +       /* export all table types */
 103 +       next = dm_get_next_target(dmt, next, &start, &length,
 104 +                                 &target_type, &params);
 105 +       if (target_type) {
 106 +               printf("DM_TARGET_TYPES=%s", target_type);
 107 +               while (next) {
 108 +                       next = dm_get_next_target(dmt, next, &start, &length,
 109 +                                                 &target_type, &params);
 110 +                       if (target_type)
 111 +                               printf(",%s", target_type);
 112 +               }
 113 +               printf("\n");
 114 +       }
 115 +
 116 +       r = 1;
 117 +      out:
 118 +       if (dmt)
 119 +               dm_task_destroy(dmt);
 120 +       return r;
 121 +}
 122 +
 123  /* Show target names and their version numbers */
 124  static int _targets(CMD_ARGS)
 125  {
 126 @@ -6243,6 +6330,7 @@ static struct command _dmsetup_commands[
 127         {"stats", "<command> [<options>] [<device>...]", 1, -1, 1, 1, _stats},
 128         {"status", "[<device>...] [--noflush] [--target <target_type>]", 0, -1, 2, 0, _status},
 129         {"table", "[<device>...] [--concise] [--target <target_type>] [--showkeys]", 0, -1, 2, 0, _status},
 130 +       {"export", "[<device>]", 0, 1, 1, 0, _export},
 131         {"wait", "<device> [<event_nr>] [--noflush]", 0, 2, 0, 0, _wait},
 132         {"mknodes", "[<device>...]", 0, -1, 1, 0, _mknodes},
 133         {"mangle", "[<device>...]", 0, -1, 1, 0, _mangle},