From: Jeff Mahoney jeffm@suse.com
commit 81f7eb00ff5bb8326e82503a32809421d14abb8a upstream.
We clean up the delayed references when we abort a transaction but we leave the pending qgroup extent records behind, leaking memory.
This patch destroys the extent records when we destroy the delayed refs and makes sure ensure they're gone before releasing the transaction.
Fixes: 3368d001ba5d ("btrfs: qgroup: Record possible quota-related extent for qgroup.") CC: stable@vger.kernel.org # 4.4+ Reviewed-by: Josef Bacik josef@toxicpanda.com Signed-off-by: Jeff Mahoney jeffm@suse.com [ Rebased to latest upstream, remove to_qgroup() helper, use rbtree_postorder_for_each_entry_safe() wrapper ] Signed-off-by: Qu Wenruo wqu@suse.com Reviewed-by: David Sterba dsterba@suse.com Signed-off-by: David Sterba dsterba@suse.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org
--- fs/btrfs/disk-io.c | 1 + fs/btrfs/qgroup.c | 13 +++++++++++++ fs/btrfs/qgroup.h | 1 + fs/btrfs/transaction.c | 2 ++ 4 files changed, 17 insertions(+)
--- a/fs/btrfs/disk-io.c +++ b/fs/btrfs/disk-io.c @@ -4272,6 +4272,7 @@ static int btrfs_destroy_delayed_refs(st cond_resched(); spin_lock(&delayed_refs->lock); } + btrfs_qgroup_destroy_extent_records(trans);
spin_unlock(&delayed_refs->lock);
--- a/fs/btrfs/qgroup.c +++ b/fs/btrfs/qgroup.c @@ -4016,3 +4016,16 @@ out: } return ret; } + +void btrfs_qgroup_destroy_extent_records(struct btrfs_transaction *trans) +{ + struct btrfs_qgroup_extent_record *entry; + struct btrfs_qgroup_extent_record *next; + struct rb_root *root; + + root = &trans->delayed_refs.dirty_extent_root; + rbtree_postorder_for_each_entry_safe(entry, next, root, node) { + ulist_free(entry->old_roots); + kfree(entry); + } +} --- a/fs/btrfs/qgroup.h +++ b/fs/btrfs/qgroup.h @@ -414,5 +414,6 @@ int btrfs_qgroup_add_swapped_blocks(stru u64 last_snapshot); int btrfs_qgroup_trace_subtree_after_cow(struct btrfs_trans_handle *trans, struct btrfs_root *root, struct extent_buffer *eb); +void btrfs_qgroup_destroy_extent_records(struct btrfs_transaction *trans);
#endif --- a/fs/btrfs/transaction.c +++ b/fs/btrfs/transaction.c @@ -121,6 +121,8 @@ void btrfs_put_transaction(struct btrfs_ BUG_ON(!list_empty(&transaction->list)); WARN_ON(!RB_EMPTY_ROOT( &transaction->delayed_refs.href_root.rb_root)); + WARN_ON(!RB_EMPTY_ROOT( + &transaction->delayed_refs.dirty_extent_root)); if (transaction->delayed_refs.pending_csums) btrfs_err(transaction->fs_info, "pending csums is %llu",