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| author | Joe Thornber <ejt@redhat.com> | 2013-05-10 15:37:20 +0200 |
|---|---|---|
| committer | Alasdair G Kergon <agk@redhat.com> | 2013-05-10 15:37:20 +0200 |
| commit | 7c3d3f2a87b01ff167a5f048285d5e3dee920235 (patch) | |
| tree | 44b483cd78221e412b314c872cb5ddedfdfd2abe /drivers/md/persistent-data/dm-space-map-metadata.c | |
| parent | dm thin: detect metadata device resizing (diff) | |
| download | linux-7c3d3f2a87b01ff167a5f048285d5e3dee920235.tar.xz linux-7c3d3f2a87b01ff167a5f048285d5e3dee920235.zip | |
dm persistent data: add threshold callback to space map
Add a threshold callback function to the persistent data space map
interface for a subsequent patch to use.
dm-thin and dm-cache are interested in knowing when they're getting
low on metadata or data blocks. This patch introduces a new method
for registering a callback against a threshold.
Signed-off-by: Joe Thornber <ejt@redhat.com>
Signed-off-by: Alasdair G Kergon <agk@redhat.com>
Diffstat (limited to 'drivers/md/persistent-data/dm-space-map-metadata.c')
| -rw-r--r-- | drivers/md/persistent-data/dm-space-map-metadata.c | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/drivers/md/persistent-data/dm-space-map-metadata.c b/drivers/md/persistent-data/dm-space-map-metadata.c index 51ca9edef444..883b465794d4 100644 --- a/drivers/md/persistent-data/dm-space-map-metadata.c +++ b/drivers/md/persistent-data/dm-space-map-metadata.c @@ -391,7 +391,8 @@ static struct dm_space_map ops = { .new_block = sm_metadata_new_block, .commit = sm_metadata_commit, .root_size = sm_metadata_root_size, - .copy_root = sm_metadata_copy_root + .copy_root = sm_metadata_copy_root, + .register_threshold_callback = NULL }; /*----------------------------------------------------------------*/ @@ -513,7 +514,8 @@ static struct dm_space_map bootstrap_ops = { .new_block = sm_bootstrap_new_block, .commit = sm_bootstrap_commit, .root_size = sm_bootstrap_root_size, - .copy_root = sm_bootstrap_copy_root + .copy_root = sm_bootstrap_copy_root, + .register_threshold_callback = NULL }; /*----------------------------------------------------------------*/ |