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| author | Mike Snitzer <snitzer@redhat.com> | 2014-01-16 03:06:55 +0100 |
|---|---|---|
| committer | Mike Snitzer <snitzer@redhat.com> | 2014-01-16 19:44:11 +0100 |
| commit | 2e68c4e6caad9fdadc1cef8b6cb9569192e8a42b (patch) | |
| tree | fdc0a4f6b3eaba7979b613b9423ec4ef23a64ca5 /drivers/md/dm-cache-target.c | |
| parent | dm thin: fix pool feature parsing (diff) | |
| download | linux-2e68c4e6caad9fdadc1cef8b6cb9569192e8a42b.tar.xz linux-2e68c4e6caad9fdadc1cef8b6cb9569192e8a42b.zip | |
dm cache: add policy name to status output
The cache's policy may have been established using the "default" alias,
which is currently the "mq" policy but the default policy may change in
the future. It is useful to know exactly which policy is being used.
Add a 'real' member to the dm_cache_policy_type structure and have the
"default" dm_cache_policy_type point to the real "mq"
dm_cache_policy_type. Update dm_cache_policy_get_name() to check if
real is set, if so report the name of the real policy (not the alias).
Requested-by: Jonathan Brassow <jbrassow@redhat.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
Diffstat (limited to 'drivers/md/dm-cache-target.c')
| -rw-r--r-- | drivers/md/dm-cache-target.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/drivers/md/dm-cache-target.c b/drivers/md/dm-cache-target.c index 11ad70540d40..09334c275c79 100644 --- a/drivers/md/dm-cache-target.c +++ b/drivers/md/dm-cache-target.c @@ -2832,7 +2832,7 @@ static void cache_resume(struct dm_target *ti) * <#demotions> <#promotions> <#dirty> * <#features> <features>* * <#core args> <core args> - * <#policy args> <policy args>* + * <policy name> <#policy args> <policy args>* */ static void cache_status(struct dm_target *ti, status_type_t type, unsigned status_flags, char *result, unsigned maxlen) @@ -2900,6 +2900,8 @@ static void cache_status(struct dm_target *ti, status_type_t type, } DMEMIT("2 migration_threshold %llu ", (unsigned long long) cache->migration_threshold); + + DMEMIT("%s ", dm_cache_policy_get_name(cache->policy)); if (sz < maxlen) { r = policy_emit_config_values(cache->policy, result + sz, maxlen - sz); if (r) |