From: Alexei Starovoitov
Date: Tue, 25 Aug 2015 20:06:30 -0700
> v1 version had a race condition in cleanup path of bpf_prog.
> I tried to fix it by adding new callback 'cleanup_rcu' to 'struct tcf_common'
> and call it out of act_api cleanup path, but Daniel noticed
> (thanks for the idea!) that
v1 version had a race condition in cleanup path of bpf_prog.
I tried to fix it by adding new callback 'cleanup_rcu' to 'struct tcf_common'
and call it out of act_api cleanup path, but Daniel noticed
(thanks for the idea!) that most of the classifiers already do action cleanup
out of rcu callback.
S
