net: sched: Change the block's chain list to an rcu list (43719298) · Commits · 戴 / test

To allow lookup of a block's chain under atomic context. Co-developed-by:

net/sched/cls_api.c

+3 −2

Original line number	Diff line number	Diff line
		@@ -22,6 +22,7 @@
		#include <linux/idr.h>
		#include <linux/rhashtable.h>
		#include <linux/jhash.h>
		#include <linux/rculist.h>
		#include <net/net_namespace.h>
		#include <net/sock.h>
		#include <net/netlink.h>
		@@ -354,7 +355,7 @@ static struct tcf_chain tcf_chain_create(struct tcf_block block,
		chain = kzalloc(sizeof(*chain), GFP_KERNEL);
		if (!chain)
		return NULL;
		list_add_tail(&chain->list, &block->chain_list);
		list_add_tail_rcu(&chain->list, &block->chain_list);
		mutex_init(&chain->filter_chain_lock);
		chain->block = block;
		chain->index = chain_index;
		@@ -394,7 +395,7 @@ static bool tcf_chain_detach(struct tcf_chain *chain)

		ASSERT_BLOCK_LOCKED(block);

		list_del(&chain->list);
		list_del_rcu(&chain->list);
		if (!chain->index)
		block->chain0.chain = NULL;