David Sterba
2014-Nov-14 14:05 UTC
[PATCH] btrfs: fix wrong accounting of raid1 data profile in statfs
The sizes that are obtained from space infos are in raw units and have
to be adjusted according to the raid factor. This was missing for
f_bavail and df reported doubled size for raid1.
Reported-by: Martin Steigerwald <Martin@lichtvoll.de>
Fixes: ba7b6e62f420 ("btrfs: adjust statfs calculations according to raid
profiles")
CC: stable@vger.kernel.org
Signed-off-by: David Sterba <dsterba@suse.cz>
---
fs/btrfs/super.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/fs/btrfs/super.c b/fs/btrfs/super.c
index 54bd91ece35b..cde9c03e3913 100644
--- a/fs/btrfs/super.c
+++ b/fs/btrfs/super.c
@@ -1824,7 +1824,7 @@ static int btrfs_statfs(struct dentry *dentry, struct
kstatfs *buf)
buf->f_bfree -= block_rsv->size >> bits;
spin_unlock(&block_rsv->lock);
- buf->f_bavail = total_free_data;
+ buf->f_bavail = div_u64(total_free_data, factor);
ret = btrfs_calc_avail_data_space(fs_info->tree_root,
&total_free_data);
if (ret) {
mutex_unlock(&fs_info->chunk_mutex);
--
1.8.4.5