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| author | Mike Snitzer <snitzer@redhat.com> | 2013-03-20 17:21:27 +0000 |
|---|---|---|
| committer | Alasdair G Kergon <agk@redhat.com> | 2013-03-20 17:21:27 +0000 |
| commit | 4e7f506f6429636115e2f58f9f97089acc62524a (patch) | |
| tree | 8758ebd6ee210ec303b661df775f31b3e9f45dd9 /drivers/md/dm-cache-policy-cleaner.c | |
| parent | e2e74d617eadc15f601983270c4f4a6935c5a943 (diff) | |
| download | lwn-4e7f506f6429636115e2f58f9f97089acc62524a.tar.gz lwn-4e7f506f6429636115e2f58f9f97089acc62524a.zip | |
dm cache: policy change version from string to integer set
Separate dm cache policy version string into 3 unsigned numbers
corresponding to major, minor and patchlevel and store them at the end
of the on-disk metadata so we know which version of the policy generated
the hints in case a future version wants to use them differently.
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
Signed-off-by: Alasdair G Kergon <agk@redhat.com>
Diffstat (limited to 'drivers/md/dm-cache-policy-cleaner.c')
| -rw-r--r-- | drivers/md/dm-cache-policy-cleaner.c | 7 |
1 files changed, 5 insertions, 2 deletions
diff --git a/drivers/md/dm-cache-policy-cleaner.c b/drivers/md/dm-cache-policy-cleaner.c index cc05d70b3cb8..b04d1f904d07 100644 --- a/drivers/md/dm-cache-policy-cleaner.c +++ b/drivers/md/dm-cache-policy-cleaner.c @@ -17,7 +17,6 @@ /*----------------------------------------------------------------*/ #define DM_MSG_PREFIX "cache cleaner" -#define CLEANER_VERSION "1.0.0" /* Cache entry struct. */ struct wb_cache_entry { @@ -434,6 +433,7 @@ static struct dm_cache_policy *wb_create(dm_cblock_t cache_size, static struct dm_cache_policy_type wb_policy_type = { .name = "cleaner", + .version = {1, 0, 0}, .hint_size = 0, .owner = THIS_MODULE, .create = wb_create @@ -446,7 +446,10 @@ static int __init wb_init(void) if (r < 0) DMERR("register failed %d", r); else - DMINFO("version " CLEANER_VERSION " loaded"); + DMINFO("version %u.%u.%u loaded", + wb_policy_type.version[0], + wb_policy_type.version[1], + wb_policy_type.version[2]); return r; } |