btrfs: output more debug messages for uncommitted transaction
Print extra information about how many dirty bytes an uncommitted
has at the end of mount.
Signed-off-by: Qu Wenruo <wqu@suse.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 41dea24..87a5add 100644
--- a/fs/btrfs/disk-io.c
+++ b/fs/btrfs/disk-io.c
@@ -4483,6 +4483,48 @@ int btrfs_commit_super(struct btrfs_fs_info *fs_info)
return btrfs_commit_transaction(trans);
}
+static void warn_about_uncommitted_trans(struct btrfs_fs_info *fs_info)
+{
+ struct btrfs_transaction *trans;
+ struct btrfs_transaction *tmp;
+ bool found = false;
+
+ if (list_empty(&fs_info->trans_list))
+ return;
+
+ /*
+ * This function is only called at the very end of close_ctree(),
+ * thus no other running transaction, no need to take trans_lock.
+ */
+ ASSERT(test_bit(BTRFS_FS_CLOSING_DONE, &fs_info->flags));
+ list_for_each_entry_safe(trans, tmp, &fs_info->trans_list, list) {
+ struct extent_state *cached = NULL;
+ u64 dirty_bytes = 0;
+ u64 cur = 0;
+ u64 found_start;
+ u64 found_end;
+
+ found = true;
+ while (!find_first_extent_bit(&trans->dirty_pages, cur,
+ &found_start, &found_end, EXTENT_DIRTY, &cached)) {
+ dirty_bytes += found_end + 1 - found_start;
+ cur = found_end + 1;
+ }
+ btrfs_warn(fs_info,
+ "transaction %llu (with %llu dirty metadata bytes) is not committed",
+ trans->transid, dirty_bytes);
+ btrfs_cleanup_one_transaction(trans, fs_info);
+
+ if (trans == fs_info->running_transaction)
+ fs_info->running_transaction = NULL;
+ list_del_init(&trans->list);
+
+ btrfs_put_transaction(trans);
+ trace_btrfs_transaction_commit(fs_info);
+ }
+ ASSERT(!found);
+}
+
void __cold close_ctree(struct btrfs_fs_info *fs_info)
{
int ret;
@@ -4591,7 +4633,7 @@ void __cold close_ctree(struct btrfs_fs_info *fs_info)
btrfs_stop_all_workers(fs_info);
/* We shouldn't have any transaction open at this point */
- ASSERT(list_empty(&fs_info->trans_list));
+ warn_about_uncommitted_trans(fs_info);
clear_bit(BTRFS_FS_OPEN, &fs_info->flags);
free_root_pointers(fs_info, true);
