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 <quwen...@cn.fujitsu.com>
Signed-off-by: Zhao Lei <zhao...@cn.fujitsu.com>
---
utils.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/utils.c b/utils.c
index d17291a..b7752df 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;
--
1.8.5.1
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