device-mapper-dmsetup-export.patch

   1 diff --git a/dmsetup/dmsetup.c b/dmsetup/dmsetup.c
   2 index 25f14a6..b693008 100644
   3 --- a/dmsetup/dmsetup.c
   4 +++ b/dmsetup/dmsetup.c
   5 @@ -995,6 +995,94 @@ static int _status(int argc, char **argv
   6         return r;
   7  }
   8
   9 +static int _export(int argc, char **argv, void *data)
  10 +{
  11 +       int r = 0;
  12 +       struct dm_task *dmt = NULL;
  13 +       void *next = NULL;
  14 +       uint64_t start, length;
  15 +       char *target_type = NULL;
  16 +       char *params;
  17 +       struct dm_names *names = (struct dm_names *) data;
  18 +       const char *name = NULL;
  19 +       const char *uuid = NULL;
  20 +       struct dm_info info;
  21 +
  22 +       if (data)
  23 +               name = names->name;
  24 +       else if (argc == 2)
  25 +               name = argv[1];
  26 +
  27 +       if (!(dmt = dm_task_create(DM_DEVICE_STATUS)))
  28 +               goto out;
  29 +
  30 +       if (!_set_task_device(dmt, name, 0))
  31 +               goto out;
  32 +
  33 +       if (!dm_task_run(dmt))
  34 +               goto out;
  35 +
  36 +       if (!dm_task_get_info(dmt, &info) || !info.exists)
  37 +               goto out;
  38 +
  39 +       if (!name)
  40 +               name = dm_task_get_name(dmt);
  41 +
  42 +       uuid = dm_task_get_uuid(dmt);
  43 +       printf("DM_NAME=%s\n", name);
  44 +
  45 +       if ((uuid = dm_task_get_uuid(dmt)) && *uuid)
  46 +               printf("DM_UUID=%s\n", uuid);
  47 +
  48 +       if (!info.exists) {
  49 +               printf("DM_STATE=NOTPRESENT\n");
  50 +               goto out;
  51 +       }
  52 +
  53 +       printf("DM_STATE=%s\n",
  54 +              info.suspended ? "SUSPENDED" :
  55 +              (info.read_only ? " READONLY" : "ACTIVE"));
  56 +
  57 +       if (!info.live_table && !info.inactive_table)
  58 +               printf("DM_TABLE_STATE=NONE\n");
  59 +       else
  60 +               printf("DM_TABLE_STATE=%s%s%s\n",
  61 +                      info.live_table ? "LIVE" : "",
  62 +                      info.live_table && info.inactive_table ? "/" : "",
  63 +                      info.inactive_table ? "INACTIVE" : "");
  64 +
  65 +       if (info.open_count != -1)
  66 +               printf("DM_OPENCOUNT=%d\n", info.open_count);
  67 +
  68 +       printf("DM_LAST_EVENT_NR=%" PRIu32 "\n", info.event_nr);
  69 +
  70 +       printf("DM_MAJOR=%d\n", info.major);
  71 +       printf("DM_MINOR=%d\n", info.minor);
  72 +
  73 +       if (info.target_count != -1)
  74 +               printf("DM_TARGET_COUNT=%d\n", info.target_count);
  75 +
  76 +       /* export all table types */
  77 +       next = dm_get_next_target(dmt, next, &start, &length,
  78 +                                 &target_type, &params);
  79 +       if (target_type) {
  80 +               printf("DM_TARGET_TYPES=%s", target_type);
  81 +               while (next) {
  82 +                       next = dm_get_next_target(dmt, next, &start, &length,
  83 +                                                 &target_type, &params);
  84 +                       if (target_type)
  85 +                               printf(",%s", target_type);
  86 +               }
  87 +               printf("\n");
  88 +       }
  89 +
  90 +       r = 1;
  91 +      out:
  92 +       if (dmt)
  93 +               dm_task_destroy(dmt);
  94 +       return r;
  95 +}
  96 +
  97  /* Show target names and their version numbers */
  98  static int _targets(int argc __attribute((unused)), char **argv __attribute((unused)), void *data __attribute((unused)))
  99  {
 100 @@ -1699,6 +1787,7 @@ static struct command _commands[] = {
 101         {"info", "[<device>]", 0, 1, _info},
 102         {"deps", "[<device>]", 0, 1, _deps},
 103         {"status", "[<device>] [--target <target_type>]", 0, 1, _status},
 104 +       {"export", "[<device>]", 0, 1, _export},
 105         {"table", "[<device>] [--target <target_type>] [--showkeys]", 0, 1, _status},
 106         {"wait", "<device> [<event_nr>]", 0, 2, _wait},
 107         {"mknodes", "[<device>]", 0, 1, _mknodes},
 108 diff --git a/man/dmsetup.8 b/man/dmsetup.8
 109 index 5b2ed9f..c4524aa 100644
 110 --- a/man/dmsetup.8
 111 +++ b/man/dmsetup.8
 112 @@ -39,13 +39,16 @@ dmsetup \- low level logical volume mana
 113  .B dmsetup ls
 114  .I [--target target_type] [--exec command] [--tree [-o options]]
 115  .br
 116 -.B dmsetup info
 117 +.B dmsetup info
 118  .I [device_name]
 119  .br
 120  .B dmsetup info -c|-C|--columns
 121  .I [--noheadings] [--separator separator] [-o fields] [-O|--sort sort_fields]
 122  .I [device_name]
 123  .br
 124 +.B dmsetup export
 125 +.I [device_name]
 126 +.br
 127  .B dmsetup deps
 128  .I [device_name]
 129  .br
 130 @@ -138,6 +141,10 @@ device_name in subsequent dmsetup comman
 131  If successful a device will appear as
 132  /dev/device-mapper/<device-name>.
 133  See below for information on the table format.
 134 +.IP \fBexport
 135 +.I [device_name]
 136 +.br
 137 +Outputs information in key/value format to be imported by other programs.
 138  .IP \fBdeps
 139  .I [device_name]
 140  .br