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| author | Joe Thornber <ejt@redhat.com> | 2013-05-10 13:37:20 (GMT) |
|---|---|---|
| committer | Alasdair G Kergon <agk@redhat.com> | 2013-05-10 13:37:20 (GMT) |
| commit | 7c3d3f2a87b01ff167a5f048285d5e3dee920235 (patch) | |
| tree | 44b483cd78221e412b314c872cb5ddedfdfd2abe /drivers/md/persistent-data/dm-space-map-disk.c | |
| parent | 24347e9595704464f62a4ed8f46abf62b4c79cdd (diff) | |
| download | linux-7c3d3f2a87b01ff167a5f048285d5e3dee920235.tar.xz | |
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-disk.c')
| -rw-r--r-- | drivers/md/persistent-data/dm-space-map-disk.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/drivers/md/persistent-data/dm-space-map-disk.c b/drivers/md/persistent-data/dm-space-map-disk.c index f6d29e6..e735a6d 100644 --- a/drivers/md/persistent-data/dm-space-map-disk.c +++ b/drivers/md/persistent-data/dm-space-map-disk.c @@ -248,7 +248,8 @@ static struct dm_space_map ops = { .new_block = sm_disk_new_block, .commit = sm_disk_commit, .root_size = sm_disk_root_size, - .copy_root = sm_disk_copy_root + .copy_root = sm_disk_copy_root, + .register_threshold_callback = NULL }; struct dm_space_map *dm_sm_disk_create(struct dm_transaction_manager *tm, |