Signed-off-by: David Sterba <dsterba@xxxxxxxx>
---
fs/btrfs/ctree.h | 5 ++++-
fs/btrfs/volumes.c | 8 ++++----
2 files changed, 8 insertions(+), 5 deletions(-)
diff --git a/fs/btrfs/ctree.h b/fs/btrfs/ctree.h
index ffc081e11277..70054ed2bd7b 100644
--- a/fs/btrfs/ctree.h
+++ b/fs/btrfs/ctree.h
@@ -100,6 +100,9 @@ struct btrfs_ordered_sum;
/* tracks free space in block groups. */
#define BTRFS_FREE_SPACE_TREE_OBJECTID 10ULL
+/* device stats in the device tree */
+#define BTRFS_DEV_STATS_OBJECTID 0ULL
+
/* for storing balance parameters in the root tree */
#define BTRFS_BALANCE_OBJECTID -4ULL
@@ -2219,7 +2222,7 @@ struct btrfs_ioctl_defrag_range_args {
*
* - device statistics, store IO stats in the device tree, one key for all
* stats
- * (0, BTRFS_DEV_STATS_KEY, 0)
+ * (BTRFS_DEV_STATS_OBJECTID, BTRFS_DEV_STATS_KEY, 0)
*/
#define BTRFS_PERSISTENT_ITEM_KEY 249
diff --git a/fs/btrfs/volumes.c b/fs/btrfs/volumes.c
index b306a205504b..177a0a8dfd31 100644
--- a/fs/btrfs/volumes.c
+++ b/fs/btrfs/volumes.c
@@ -6705,8 +6705,8 @@ int btrfs_init_dev_stats(struct btrfs_fs_info *fs_info)
int item_size;
struct btrfs_dev_stats_item *ptr;
- key.objectid = 0;
- key.type = BTRFS_DEV_STATS_KEY;
+ key.objectid = BTRFS_DEV_STATS_OBJECTID;
+ key.type = BTRFS_PERSISTENT_ITEM_KEY;
key.offset = device->devid;
ret = btrfs_search_slot(NULL, dev_root, &key, path, 0, 0);
if (ret) {
@@ -6753,8 +6753,8 @@ static int update_dev_stat_item(struct btrfs_trans_handle *trans,
int ret;
int i;
- key.objectid = 0;
- key.type = BTRFS_DEV_STATS_KEY;
+ key.objectid = BTRFS_DEV_STATS_OBJECTID;
+ key.type = BTRFS_PERSISTENT_ITEM_KEY;
key.offset = device->devid;
path = btrfs_alloc_path();
--
2.7.1
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