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path: root/drivers/md/dm-thin-metadata.c
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Diffstat (limited to 'drivers/md/dm-thin-metadata.c')
-rw-r--r--drivers/md/dm-thin-metadata.c36
1 files changed, 31 insertions, 5 deletions
diff --git a/drivers/md/dm-thin-metadata.c b/drivers/md/dm-thin-metadata.c
index 00cee02f8fc..60bce435f4f 100644
--- a/drivers/md/dm-thin-metadata.c
+++ b/drivers/md/dm-thin-metadata.c
@@ -1645,12 +1645,12 @@ int dm_thin_get_highest_mapped_block(struct dm_thin_device *td,
return r;
}
-static int __resize_data_dev(struct dm_pool_metadata *pmd, dm_block_t new_count)
+static int __resize_space_map(struct dm_space_map *sm, dm_block_t new_count)
{
int r;
dm_block_t old_count;
- r = dm_sm_get_nr_blocks(pmd->data_sm, &old_count);
+ r = dm_sm_get_nr_blocks(sm, &old_count);
if (r)
return r;
@@ -1658,11 +1658,11 @@ static int __resize_data_dev(struct dm_pool_metadata *pmd, dm_block_t new_count)
return 0;
if (new_count < old_count) {
- DMERR("cannot reduce size of data device");
+ DMERR("cannot reduce size of space map");
return -EINVAL;
}
- return dm_sm_extend(pmd->data_sm, new_count - old_count);
+ return dm_sm_extend(sm, new_count - old_count);
}
int dm_pool_resize_data_dev(struct dm_pool_metadata *pmd, dm_block_t new_count)
@@ -1671,7 +1671,19 @@ int dm_pool_resize_data_dev(struct dm_pool_metadata *pmd, dm_block_t new_count)
down_write(&pmd->root_lock);
if (!pmd->fail_io)
- r = __resize_data_dev(pmd, new_count);
+ r = __resize_space_map(pmd->data_sm, new_count);
+ up_write(&pmd->root_lock);
+
+ return r;
+}
+
+int dm_pool_resize_metadata_dev(struct dm_pool_metadata *pmd, dm_block_t new_count)
+{
+ int r = -EINVAL;
+
+ down_write(&pmd->root_lock);
+ if (!pmd->fail_io)
+ r = __resize_space_map(pmd->metadata_sm, new_count);
up_write(&pmd->root_lock);
return r;
@@ -1684,3 +1696,17 @@ void dm_pool_metadata_read_only(struct dm_pool_metadata *pmd)
dm_bm_set_read_only(pmd->bm);
up_write(&pmd->root_lock);
}
+
+int dm_pool_register_metadata_threshold(struct dm_pool_metadata *pmd,
+ dm_block_t threshold,
+ dm_sm_threshold_fn fn,
+ void *context)
+{
+ int r;
+
+ down_write(&pmd->root_lock);
+ r = dm_sm_register_threshold_callback(pmd->metadata_sm, threshold, fn, context);
+ up_write(&pmd->root_lock);
+
+ return r;
+}