diff --git a/dmsetup/dmsetup.c b/dmsetup/dmsetup.c index 25f14a6..b693008 100644 --- a/dmsetup/dmsetup.c +++ b/dmsetup/dmsetup.c @@ -995,6 +995,94 @@ static int _status(int argc, char **argv return r; } +static int _export(int argc, char **argv, void *data) +{ + int r = 0; + struct dm_task *dmt = NULL; + void *next = NULL; + uint64_t start, length; + char *target_type = NULL; + char *params; + struct dm_names *names = (struct dm_names *) data; + const char *name = NULL; + const char *uuid = NULL; + struct dm_info info; + + if (data) + name = names->name; + else if (argc == 2) + name = argv[1]; + + if (!(dmt = dm_task_create(DM_DEVICE_STATUS))) + goto out; + + if (!_set_task_device(dmt, name, 0)) + goto out; + + if (!dm_task_run(dmt)) + goto out; + + if (!dm_task_get_info(dmt, &info) || !info.exists) + goto out; + + if (!name) + name = dm_task_get_name(dmt); + + uuid = dm_task_get_uuid(dmt); + printf("DM_NAME=%s\n", name); + + if ((uuid = dm_task_get_uuid(dmt)) && *uuid) + printf("DM_UUID=%s\n", uuid); + + if (!info.exists) { + printf("DM_STATE=NOTPRESENT\n"); + goto out; + } + + printf("DM_STATE=%s\n", + info.suspended ? "SUSPENDED" : + (info.read_only ? " READONLY" : "ACTIVE")); + + if (!info.live_table && !info.inactive_table) + printf("DM_TABLE_STATE=NONE\n"); + else + printf("DM_TABLE_STATE=%s%s%s\n", + info.live_table ? "LIVE" : "", + info.live_table && info.inactive_table ? "/" : "", + info.inactive_table ? "INACTIVE" : ""); + + if (info.open_count != -1) + printf("DM_OPENCOUNT=%d\n", info.open_count); + + printf("DM_LAST_EVENT_NR=%" PRIu32 "\n", info.event_nr); + + printf("DM_MAJOR=%d\n", info.major); + printf("DM_MINOR=%d\n", info.minor); + + if (info.target_count != -1) + printf("DM_TARGET_COUNT=%d\n", info.target_count); + + /* export all table types */ + next = dm_get_next_target(dmt, next, &start, &length, + &target_type, ¶ms); + if (target_type) { + printf("DM_TARGET_TYPES=%s", target_type); + while (next) { + next = dm_get_next_target(dmt, next, &start, &length, + &target_type, ¶ms); + if (target_type) + printf(",%s", target_type); + } + printf("\n"); + } + + r = 1; + out: + if (dmt) + dm_task_destroy(dmt); + return r; +} + /* Show target names and their version numbers */ static int _targets(int argc __attribute((unused)), char **argv __attribute((unused)), void *data __attribute((unused))) { @@ -1699,6 +1787,7 @@ static struct command _commands[] = { {"info", "[]", 0, 1, _info}, {"deps", "[]", 0, 1, _deps}, {"status", "[] [--target ]", 0, 1, _status}, + {"export", "[]", 0, 1, _export}, {"table", "[] [--target ] [--showkeys]", 0, 1, _status}, {"wait", " []", 0, 2, _wait}, {"mknodes", "[]", 0, 1, _mknodes}, diff --git a/man/dmsetup.8 b/man/dmsetup.8 index 5b2ed9f..c4524aa 100644 --- a/man/dmsetup.8 +++ b/man/dmsetup.8 @@ -39,13 +39,16 @@ dmsetup \- low level logical volume mana .B dmsetup ls .I [--target target_type] [--exec command] [--tree [-o options]] .br -.B dmsetup info +.B dmsetup info .I [device_name] .br .B dmsetup info -c|-C|--columns .I [--noheadings] [--separator separator] [-o fields] [-O|--sort sort_fields] .I [device_name] .br +.B dmsetup export +.I [device_name] +.br .B dmsetup deps .I [device_name] .br @@ -138,6 +141,10 @@ device_name in subsequent dmsetup comman If successful a device will appear as /dev/device-mapper/. See below for information on the table format. +.IP \fBexport +.I [device_name] +.br +Outputs information in key/value format to be imported by other programs. .IP \fBdeps .I [device_name] .br