Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/sage/ceph...

[firefly-linux-kernel-4.4.55.git] / drivers / md / dm-thin-metadata.c

diff --git a/drivers/md/dm-thin-metadata.c b/drivers/md/dm-thin-metadata.c
index 00cee02f8fc9b299788941c9b4147abdfc56c83c..60bce435f4fa1443c2994bd483e70ea096c7aa92 100644 (file)
--- 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;
+}