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net: sched: Change the block's chain list to an rcu list

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To allow lookup of a block's chain under atomic context.

Co-developed-by: Vlad Buslov <vladbu@mellanox.com>
Signed-off-by: Vlad Buslov <vladbu@mellanox.com>
Signed-off-by: Paul Blakey <paulb@mellanox.com>
Reviewed-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
This commit is contained in:
Paul Blakey 2020-02-16 12:01:23 +02:00 committed by Saeed Mahameed
parent 7d17c544cd
commit 4371929819
1 changed files with 3 additions and 2 deletions
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5
net/sched/cls_api.c
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@ -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;