btrfs-progs: mkfs: Round device size down to sectorsize

When do following command in a vm, whose disks are created by
qemu-img create -f raw 11 2.6G:
 # mkfs.btrfs -f /dev/vdd /dev/vde /dev/vdf
 # btrfs-show-super /dev/vdd /dev/vde /dev/vdf | grep dev_item.total_bytes
 dev_item.total_bytes    2791727104
 dev_item.total_bytes    2791729152
 dev_item.total_bytes    2791729152
We can see that the first device's size is little smaller.

And it fails xfstests btrfs/011.

Reason:
 First device's size is rounded down to sectorsize in make_btrfs(),
 but other devices are not.

Fix:
 Round down remain devices' size in btrfs_add_to_fsid().

Reported-by: Qu Wenruo <quwenruo@cn.fujitsu.com>
Signed-off-by: Zhao Lei <zhaolei@cn.fujitsu.com>
Signed-off-by: David Sterba <dsterba@suse.com>

1 files changed, 2 insertions, 0 deletions

diff --git a/utils.c b/utils.c
index 93338beb..d546bea2 100644
--- a/utils.c
+++ b/utils.c
@@ -736,6 +736,8 @@ int btrfs_add_to_fsid(struct btrfs_trans_handle *trans,
 	u64 num_devs;
 	int ret;
 
+	device_total_bytes = (device_total_bytes / sectorsize) * sectorsize;
+
 	device = kzalloc(sizeof(*device), GFP_NOFS);
 	if (!device)
 		goto err_nomem;