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Zero metadata if on-disk version differs from current

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Kernel adapter now returns is_cache_device=1 and newly added
metadata_compatible=0 in case of metadata detected with
differing version (instead of is_cache_device = 0).

This allows zero-superblock command to recognize old
cache instance and clear it.

casadm --script --check-cache-device still returns 'Is cache'='no'
in this case, as this layer only cares about metadata in current
version to be able to detect dirty datas tatus.

Signed-off-by: Adam Rutkowski <adam.j.rutkowski@intel.com>
This commit is contained in:
Adam Rutkowski
2021-01-21 14:31:00 -06:00
parent 63eb23ba40
commit 68b68db9c0
3 changed files with 14 additions and 3 deletions
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2
casadm/cas_lib.c
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@@ -2894,7 +2894,7 @@ int check_cache_device(const char *device_path)
fprintf(intermediate_file[1], TAG(TABLE_HEADER) "Is cache,Clean Shutdown,Cache dirty\n");
fprintf(intermediate_file[1], TAG(TABLE_ROW));
if (cmd_info.is_cache_device) {
if (cmd_info.is_cache_device && cmd_info.metadata_compatible) {
fprintf(intermediate_file[1], "yes,%s,%s\n",
cmd_info.clean_shutdown ? "yes" : "no",
cmd_info.cache_dirty ? "yes" : "no");