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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>
This commit is contained in:
Qu Wenruo 2021-12-16 19:47:36 +08:00 committed by David Sterba
parent c2f822635d
commit 36c86a9e1b
1 changed files with 43 additions and 1 deletions
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44
fs/btrfs/disk-io.c
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@ -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);