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cache: use writethrough cache_mode for older metadata

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When cache_mode is undefined, the read of metadata will miss to
set a bit with mode and fails to process metadata on internal
error:

  Internal error: LV vg/lvol1 has uknown feature flags 0.

Fix it by setting it to writethrough mode.
This commit is contained in:
Zdenek Kabelac 2015-01-29 12:05:58 +01:00
parent bfeabea631
commit 8dc1da2cbe
2 changed files with 4 additions and 1 deletions
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1
WHATS_NEW
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@ -1,5 +1,6 @@
Version 2.02.116 - Version 2.02.116 -
==================================== ====================================
Set default cache_mode to writehrough when missing in metadata.
Preserve chunk size with repair and metadata swap of a thin pool. Preserve chunk size with repair and metadata swap of a thin pool.
Fix raid --splitmirror 1 functionality (2.02.112). Fix raid --splitmirror 1 functionality (2.02.112).
Fix tree preload to handle splitting raid images. Fix tree preload to handle splitting raid images.

4
lib/cache_segtype/cache.c
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@ -68,7 +68,9 @@ static int _cache_pool_text_import(struct lv_segment *seg,
return SEG_LOG_ERROR("cache_mode must be a string in"); return SEG_LOG_ERROR("cache_mode must be a string in");
if (!set_cache_pool_feature(&seg->feature_flags, str)) if (!set_cache_pool_feature(&seg->feature_flags, str))
return SEG_LOG_ERROR("Unknown cache_mode in"); return SEG_LOG_ERROR("Unknown cache_mode in");
} } else
/* When missed in metadata, it's an old stuff - use writethrough */
seg->feature_flags |= DM_CACHE_FEATURE_WRITETHROUGH;
if (dm_config_has_node(sn, "policy")) { if (dm_config_has_node(sn, "policy")) {
if (!(str = dm_config_find_str(sn, "policy", NULL))) if (!(str = dm_config_find_str(sn, "policy", NULL)))