[ovs-dev] [PATCH] net: openvswitch: use hlist_for_each_entry_rcu instead of hlist_for_each_entry
Gregory Rose
gvrose8192 at gmail.com
Thu Apr 2 19:45:09 UTC 2020
On 3/25/2020 1:27 PM, xiangxia.m.yue at gmail.com wrote:
> From: Tonghao Zhang <xiangxia.m.yue at gmail.com>
>
> The struct sw_flow is protected by RCU, when traversing them,
> use hlist_for_each_entry_rcu.
>
> Signed-off-by: Tonghao Zhang <xiangxia.m.yue at gmail.com>
> ---
> net/openvswitch/flow_table.c | 10 ++++++----
> 1 file changed, 6 insertions(+), 4 deletions(-)
>
> diff --git a/net/openvswitch/flow_table.c b/net/openvswitch/flow_table.c
> index fd8a01c..b7b5744 100644
> --- a/net/openvswitch/flow_table.c
> +++ b/net/openvswitch/flow_table.c
> @@ -462,12 +462,14 @@ static void flow_table_copy_flows(struct table_instance *old,
> struct hlist_head *head = &old->buckets[i];
>
> if (ufid)
> - hlist_for_each_entry(flow, head,
> - ufid_table.node[old_ver])
> + hlist_for_each_entry_rcu(flow, head,
> + ufid_table.node[old_ver],
> + lockdep_ovsl_is_held())
> ufid_table_instance_insert(new, flow);
> else
> - hlist_for_each_entry(flow, head,
> - flow_table.node[old_ver])
> + hlist_for_each_entry_rcu(flow, head,
> + flow_table.node[old_ver],
> + lockdep_ovsl_is_held())
> table_instance_insert(new, flow);
> }
>
>
Applies cleanly and compile test passes. Passes openvswitch kernel
testsuite. Code looks fine to me.
Tested-by: Greg Rose <gvrose8192 at gmail.com>
Reviewed-by: Greg Rose <gvrose8192 at gmail.com>
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