btrfs: rename BTRFS_FS_NO_OVERCOMMIT to BTRFS_FS_ACTIVE_ZONE_TRACKING

This flag only gets set when we're doing active zone tracking, and we're
going to need to use this flag for things related to this behavior.
Rename the flag to represent what it actually means for the file system
so it can be used in other ways and still make sense.

Reviewed-by: Naohiro Aota <naohiro.aota@wdc.com>
Reviewed-by: Johannes Thumshirn <johannes.thumshirn@wdc.com>
Reviewed-by: Anand Jain <anand.jain@oracle.com>
Signed-off-by: Josef Bacik <josef@toxicpanda.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>

fs/btrfs/fs.h

@@ -120,11 +120,8 @@ enum {
 	/* Indicate that we want to commit the transaction. */
 	BTRFS_FS_NEED_TRANS_COMMIT,
 
-	/*
-	 * Indicate metadata over-commit is disabled. This is set when active
-	 * zone tracking is needed.
-	 */
-	BTRFS_FS_NO_OVERCOMMIT,
+	/* This is set when active zone tracking is needed. */
+	BTRFS_FS_ACTIVE_ZONE_TRACKING,
 
 	/*
 	 * Indicate if we have some features changed, this is mostly for

fs/btrfs/space-info.c

@@ -407,7 +407,7 @@ int btrfs_can_overcommit(struct btrfs_fs_info *fs_info,
 		return 0;
 
 	used = btrfs_space_info_used(space_info, true);
-	if (test_bit(BTRFS_FS_NO_OVERCOMMIT, &fs_info->flags) &&
+	if (test_bit(BTRFS_FS_ACTIVE_ZONE_TRACKING, &fs_info->flags) &&
 	    (space_info->flags & BTRFS_BLOCK_GROUP_METADATA))
 		avail = 0;
 	else

fs/btrfs/zoned.c

@@ -524,8 +524,7 @@ int btrfs_get_dev_zone_info(struct btrfs_device *device, bool populate_cache)
 		}
 		atomic_set(&zone_info->active_zones_left,
 			   max_active_zones - nactive);
-		/* Overcommit does not work well with active zone tacking. */
-		set_bit(BTRFS_FS_NO_OVERCOMMIT, &fs_info->flags);
+		set_bit(BTRFS_FS_ACTIVE_ZONE_TRACKING, &fs_info->flags);
 	}
 
 	/* Validate superblock log */