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dm cache: display 'needs_check' in status if it is set

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There is currently no way to see that the needs_check flag has been set
in the metadata.  Display 'needs_check' in the cache status if it is set
in the cache metadata.

Also, update cache documentation.

Signed-off-by: Mike Snitzer <[email protected]>
This commit is contained in:
Mike Snitzer 2015-07-15 11:42:59 -04:00
commit 255eac2005
2 changed files with 13 additions and 2 deletions
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9
drivers/md/dm-cache-target.c
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@ -3496,7 +3496,7 @@ static void cache_resume(struct dm_target *ti)
* <#demotions> <#promotions> <#dirty>
* <#features> <features>*
* <#core args> <core args>
* <policy name> <#policy args> <policy args>* <cache metadata mode>
* <policy name> <#policy args> <policy args>* <cache metadata mode> <needs_check>
*/
static void cache_status(struct dm_target *ti, status_type_t type,
unsigned status_flags, char *result, unsigned maxlen)
@ -3582,6 +3582,11 @@ static void cache_status(struct dm_target *ti, status_type_t type,
else
DMEMIT("rw ");
if (dm_cache_metadata_needs_check(cache->cmd))
DMEMIT("needs_check ");
else
DMEMIT("- ");
break;
case STATUSTYPE_TABLE:
@ -3820,7 +3825,7 @@ static void cache_io_hints(struct dm_target *ti, struct queue_limits *limits)
static struct target_type cache_target = {
.name = "cache",
.version = {1, 7, 0},
.version = {1, 8, 0},
.module = THIS_MODULE,
.ctr = cache_ctr,
.dtr = cache_dtr,