btrfs: Introduce mount time chunk <-> dev extent mapping check
This patch will introduce chunk <-> dev extent mapping check, to protect
us against invalid dev extents or chunks.
Since chunk mapping is the fundamental infrastructure of btrfs, extra
check at mount time could prevent a lot of unexpected behavior (BUG_ON).
Reported-by: Xu Wen <wen.xu@gatech.edu>
Link: https://bugzilla.kernel.org/show_bug.cgi?id=200403
Link: https://bugzilla.kernel.org/show_bug.cgi?id=200407
Signed-off-by: Qu Wenruo <wqu@suse.com>
Reviewed-by: Su Yue <suy.fnst@cn.fujitsu.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
diff --git a/fs/btrfs/disk-io.c b/fs/btrfs/disk-io.c
index 6a5a3cd..5124c15 100644
--- a/fs/btrfs/disk-io.c
+++ b/fs/btrfs/disk-io.c
@@ -3030,6 +3030,13 @@ int open_ctree(struct super_block *sb,
fs_info->generation = generation;
fs_info->last_trans_committed = generation;
+ ret = btrfs_verify_dev_extents(fs_info);
+ if (ret) {
+ btrfs_err(fs_info,
+ "failed to verify dev extents against chunks: %d",
+ ret);
+ goto fail_block_groups;
+ }
ret = btrfs_recover_balance(fs_info);
if (ret) {
btrfs_err(fs_info, "failed to recover balance: %d", ret);