Commit 25a860c4 authored by Qu Wenruo's avatar Qu Wenruo Committed by David Sterba
Browse files

btrfs: output human readable space info flag 



For btrfs_space_info, its flags has only 4 possible values:

- BTRFS_BLOCK_GROUP_SYSTEM
- BTRFS_BLOCK_GROUP_METADATA | BTRFS_BLOCK_GROUP_DATA
- BTRFS_BLOCK_GROUP_METADATA
- BTRFS_BLOCK_GROUP_DATA

Make the output more human readable, now it looks like:

  BTRFS info (device dm-1: state A): space_info METADATA has 251494400 free, is not full

Reviewed-by: default avatarJohannes Thumshirn <johannes.thumshirn@wdc.com>
Signed-off-by: default avatarQu Wenruo <wqu@suse.com>
Reviewed-by: default avatarDavid Sterba <dsterba@suse.com>
Signed-off-by: default avatarDavid Sterba <dsterba@suse.com>
parent a05d3c91

fs/btrfs/space-info.c

+20 −3
Original line number Diff line number Diff line
@@ -476,14 +476,31 @@ do { \ 
	spin_unlock(&__rsv->lock);					\

} while (0)



static const char *space_info_flag_to_str(const struct btrfs_space_info *space_info)

{

	switch (space_info->flags) {

	case BTRFS_BLOCK_GROUP_SYSTEM:

		return "SYSTEM";

	case BTRFS_BLOCK_GROUP_METADATA | BTRFS_BLOCK_GROUP_DATA:

		return "DATA+METADATA";

	case BTRFS_BLOCK_GROUP_DATA:

		return "DATA";

	case BTRFS_BLOCK_GROUP_METADATA:

		return "METADATA";

	default:

		return "UNKNOWN";

	}

}



static void __btrfs_dump_space_info(struct btrfs_fs_info *fs_info,

				    struct btrfs_space_info *info)

{

	const char *flag_str = space_info_flag_to_str(info);

	lockdep_assert_held(&info->lock);



	/* The free space could be negative in case of overcommit */

	btrfs_info(fs_info, "space_info %llu has %lld free, is %sfull",

		   info->flags,

	btrfs_info(fs_info, "space_info %s has %lld free, is %sfull",

		   flag_str,

		   (s64)(info->total_bytes - btrfs_space_info_used(info, true)),

		   info->full ? "" : "not ");

	btrfs_info(fs_info,