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btrfs: switch dev stats item to the permanent item key

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Signed-off-by: David Sterba <dsterba@suse.com>
This commit is contained in:
David Sterba 2016-01-25 17:51:31 +01:00
parent 50c2d5abe6
commit 242e2956e4
2 changed files with 8 additions and 5 deletions
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5
fs/btrfs/ctree.h
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@ -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

8
fs/btrfs/volumes.c
View File

@ -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();