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| author | Joe Thornber <ejt@redhat.com> | 2013-05-10 15:37:21 +0200 |
|---|---|---|
| committer | Alasdair G Kergon <agk@redhat.com> | 2013-05-10 15:37:21 +0200 |
| commit | ac8c3f3df65e487bbcabf274eeeb9cd222f5da1e (patch) | |
| tree | e1ab6d4662834bbbf248b1ad6224c9b7c3faa15e /drivers/md/dm-thin-metadata.h | |
| parent | dm persistent metadata: add space map threshold callback (diff) | |
| download | linux-ac8c3f3df65e487bbcabf274eeeb9cd222f5da1e.tar.xz linux-ac8c3f3df65e487bbcabf274eeeb9cd222f5da1e.zip | |
dm thin: generate event when metadata threshold passed
Generate a dm event when the amount of remaining thin pool metadata
space falls below a certain level.
The threshold is taken to be a quarter of the size of the metadata
device with a minimum threshold of 4MB.
Signed-off-by: Joe Thornber <ejt@redhat.com>
Signed-off-by: Alasdair G Kergon <agk@redhat.com>
Diffstat (limited to 'drivers/md/dm-thin-metadata.h')
| -rw-r--r-- | drivers/md/dm-thin-metadata.h | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/drivers/md/dm-thin-metadata.h b/drivers/md/dm-thin-metadata.h index ef8dd709e34e..845ebbe589a9 100644 --- a/drivers/md/dm-thin-metadata.h +++ b/drivers/md/dm-thin-metadata.h @@ -8,6 +8,7 @@ #define DM_THIN_METADATA_H #include "persistent-data/dm-block-manager.h" +#include "persistent-data/dm-space-map.h" #define THIN_METADATA_BLOCK_SIZE 4096 @@ -193,6 +194,11 @@ int dm_pool_resize_metadata_dev(struct dm_pool_metadata *pmd, dm_block_t new_siz */ void dm_pool_metadata_read_only(struct dm_pool_metadata *pmd); +int dm_pool_register_metadata_threshold(struct dm_pool_metadata *pmd, + dm_block_t threshold, + dm_sm_threshold_fn fn, + void *context); + /*----------------------------------------------------------------*/ #endif |