Donate to e Foundation | Murena handsets with /e/OS | Own a part of Murena! Learn more

Commit 04f721c6 authored by Eric W. Biederman's avatar Eric W. Biederman Committed by David S. Miller
Browse files

tcp_metrics: Rewrite tcp_metrics_flush_all 



Rewrite tcp_metrics_flush_all so that it can cope with entries from
different network namespaces on it's hash chain.

This is based on the logic in tcp_metrics_nl_cmd_del for deleting
a selection of entries from a tcp metrics hash chain.

Signed-off-by: default avatar"Eric W. Biederman" <ebiederm@xmission.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 8a4bff71

net/ipv4/tcp_metrics.c

+11 −10
Original line number Diff line number Diff line
@@ -1051,18 +1051,19 @@ static void tcp_metrics_flush_all(struct net *net) 
	unsigned int row;



	for (row = 0; row < max_rows; row++, hb++) {

		struct tcp_metrics_block __rcu **pp;

		spin_lock_bh(&tcp_metrics_lock);

		tm = deref_locked_genl(hb->chain);

		if (tm)

			hb->chain = NULL;

		spin_unlock_bh(&tcp_metrics_lock);

		while (tm) {

			struct tcp_metrics_block *next;



			next = deref_genl(tm->tcpm_next);

		pp = &hb->chain;

		for (tm = deref_locked_genl(*pp); tm;

		     tm = deref_locked_genl(*pp)) {

			if (net_eq(tm_net(tm), net)) {

				*pp = tm->tcpm_next;

				kfree_rcu(tm, rcu_head);

			tm = next;

			} else {

				pp = &tm->tcpm_next;

			}

		}

		spin_unlock_bh(&tcp_metrics_lock);

	}

}