Commit 1ff9fee3 authored by Filipe Manana's avatar Filipe Manana Committed by David Sterba
Browse files

btrfs: print available space across all block groups when dumping space info 



When dumping a space info also sum the available space for all block
groups and then print it. This often useful for debugging -ENOSPC
related problems.

Signed-off-by: default avatarFilipe Manana <fdmanana@suse.com>
Signed-off-by: default avatarDavid Sterba <dsterba@suse.com>
parent e50b122b

fs/btrfs/space-info.c

+4 −0
Original line number Diff line number Diff line
@@ -510,6 +510,7 @@ void btrfs_dump_space_info(struct btrfs_fs_info *fs_info, 
			   int dump_block_groups)

{

	struct btrfs_block_group *cache;

	u64 total_avail = 0;

	int index = 0;



	spin_lock(&info->lock);
@@ -537,10 +538,13 @@ void btrfs_dump_space_info(struct btrfs_fs_info *fs_info, 
			   avail, cache->ro ? "[readonly]" : "");

		spin_unlock(&cache->lock);

		btrfs_dump_free_space(cache, bytes);

		total_avail += avail;

	}

	if (++index < BTRFS_NR_RAID_TYPES)

		goto again;

	up_read(&info->groups_sem);



	btrfs_info(fs_info, "%llu bytes available across all block groups", total_avail);

}



static inline u64 calc_reclaim_items_nr(const struct btrfs_fs_info *fs_info,