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uuid: add more private uuid sufixes

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Use suffixes for easier detection of private volumes.

This commit makes older volume UUIDs incompatible and
it most probably needs machine reboot after upgrade.
This commit is contained in:
Zdenek Kabelac 2014-06-27 00:03:31 +02:00
parent 2ada685216
commit 667f93b7d9
2 changed files with 19 additions and 2 deletions
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1
WHATS_NEW
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@ -1,5 +1,6 @@
Version 2.02.108 -
=================================
Enhance private volumes UUIDs with suffixed for easier detection.
Do not use reserved _[tc]meta volumes for temporary LVs.
Leave backup pool metadata with _meta%d suffix instead of reserved _tmeta%d.
Allow RAID repair to reuse PVs from same image that suffered a failure.

20
lib/misc/lvm-string.c
View File

@ -178,8 +178,24 @@ char *build_dm_uuid(struct dm_pool *mem, const struct logical_volume *lv,
{
const char *lvid = lv->lvid.s;
if (!layer && lv_is_thin_pool(lv))
layer = "pool";
if (!layer) {
/*
* Mark internal LVs with layer suffix
* so tools like blkid may immeditelly see it's
* an internal LV they should not scan
* Should also make internal detection simpler
*/
layer = lv_is_cache_pool_data(lv) ? "cdata" :
lv_is_cache_pool_metadata(lv) ? "cmeta" :
lv_is_mirror_image(lv) ? "mimage" :
lv_is_mirror_log(lv) ? "mlog" :
lv_is_raid_image(lv) ? "rimage" :
lv_is_raid_metadata(lv) ? "rmeta" :
lv_is_thin_pool(lv) ? "pool" :
lv_is_thin_pool_data(lv) ? "tdata" :
lv_is_thin_pool_metadata(lv) ? "tmeta" :
NULL;
}
return dm_build_dm_uuid(mem, UUID_PREFIX, lvid, layer);
}