Commit 6550f075 authored by Joe Thornber's avatar Joe Thornber Committed by Mike Snitzer

dm thin metadata: add dm_thin_remove_range()

Removes a range of blocks from the btree.
Signed-off-by: default avatarJoe Thornber <ejt@redhat.com>
Signed-off-by: default avatarMike Snitzer <snitzer@redhat.com>
parent a5d895a9
......@@ -1526,6 +1526,47 @@ static int __remove(struct dm_thin_device *td, dm_block_t block)
return 0;
}
static int __remove_range(struct dm_thin_device *td, dm_block_t begin, dm_block_t end)
{
int r;
unsigned count;
struct dm_pool_metadata *pmd = td->pmd;
dm_block_t keys[1] = { td->id };
__le64 value;
dm_block_t mapping_root;
/*
* Find the mapping tree
*/
r = dm_btree_lookup(&pmd->tl_info, pmd->root, keys, &value);
if (r)
return r;
/*
* Remove from the mapping tree, taking care to inc the
* ref count so it doesn't get deleted.
*/
mapping_root = le64_to_cpu(value);
dm_tm_inc(pmd->tm, mapping_root);
r = dm_btree_remove(&pmd->tl_info, pmd->root, keys, &pmd->root);
if (r)
return r;
r = dm_btree_remove_leaves(&pmd->bl_info, mapping_root, &begin, end, &mapping_root, &count);
if (r)
return r;
td->mapped_blocks -= count;
td->changed = 1;
/*
* Reinsert the mapping tree.
*/
value = cpu_to_le64(mapping_root);
__dm_bless_for_disk(&value);
return dm_btree_insert(&pmd->tl_info, pmd->root, keys, &value, &pmd->root);
}
int dm_thin_remove_block(struct dm_thin_device *td, dm_block_t block)
{
int r = -EINVAL;
......@@ -1538,6 +1579,19 @@ int dm_thin_remove_block(struct dm_thin_device *td, dm_block_t block)
return r;
}
int dm_thin_remove_range(struct dm_thin_device *td,
dm_block_t begin, dm_block_t end)
{
int r = -EINVAL;
down_write(&td->pmd->root_lock);
if (!td->pmd->fail_io)
r = __remove_range(td, begin, end);
up_write(&td->pmd->root_lock);
return r;
}
int dm_pool_block_is_used(struct dm_pool_metadata *pmd, dm_block_t b, bool *result)
{
int r;
......
......@@ -167,6 +167,8 @@ int dm_thin_insert_block(struct dm_thin_device *td, dm_block_t block,
dm_block_t data_block);
int dm_thin_remove_block(struct dm_thin_device *td, dm_block_t block);
int dm_thin_remove_range(struct dm_thin_device *td,
dm_block_t begin, dm_block_t end);
/*
* Queries.
......
Markdown is supported
0%
or
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment