tcp_metrics: Rewrite tcp_metrics_flush_all (04f721c6) · Commits · 戴 / test

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:

"Eric W. Biederman" <ebiederm@xmission.com> Signed-off-by:

David S. Miller <davem@davemloft.net>

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);
		}
		}

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