xiaomi-sm8450/android_kernel_xiaomi_sm8450
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

dm persistent data: add threshold callback to space map

Browse Source 
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>
This commit is contained in:
Joe Thornber
2013-05-10 14:37:20 +01:00
committed by Alasdair G Kergon
parent 24347e9595
commit 7c3d3f2a87
3 changed files with 29 additions and 3 deletions
Download Patch File Download Diff File Expand all files Collapse all files

6
drivers/md/persistent-data/dm-space-map-metadata.c
View File

@@ -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
};
/*----------------------------------------------------------------*/