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btrfs-progs: switch dev stats item to the permanent item key 

[ kernel patch 242e2956e4afde7727fffe21adc0a7b198b77f96 ]
Signed-off-by: David Sterba <dsterba@suse.com>
master
David Sterba 2016-11-01 13:34:13 +01:00
parent e244550b42
commit 2add123c8e
1 changed files with 4 additions and 1 deletions
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5
ctree.h
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@ -85,6 +85,9 @@ struct btrfs_free_space_ctl;
/* 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
@ -1244,7 +1247,7 @@ struct btrfs_root {
*
* - 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