3.17-stable review patch. If anyone has any objections, please let me know.
------------------
From: David Sterba <dsterba@xxxxxxx>
commit 0d95c1bec906dd1ad951c9c001e798ca52baeb0f upstream.
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@xxxxxxxxxxxx>
Fixes: ba7b6e62f420 ("btrfs: adjust statfs calculations according to raid profiles")
Signed-off-by: David Sterba <dsterba@xxxxxxx>
Signed-off-by: Chris Mason <clm@xxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
fs/btrfs/super.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/fs/btrfs/super.c
+++ b/fs/btrfs/super.c
@@ -1731,7 +1731,7 @@ static int btrfs_statfs(struct dentry *d
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);
--
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