On 8/4/15 1:55 AM, Daniel Borkmann wrote:
Okay, what happens however, when we have an action attached to a
classifier and do a replace on that action, meaning one CPU is still
executing the filter inside tcf_bpf(), while another one is already
running tcf_bpf_cfg_cleanup() on that prog? Afaik, th
On 08/04/2015 07:09 AM, Alexei Starovoitov wrote:
Similar to act_gact/act_mirred, act_bpf can be lockless in packet processing.
Also similar to gact/mirred there is a race between prog->filter and
prog->tcf_action. Meaning that the program being replaced may use
previous default action if it hap
Similar to act_gact/act_mirred, act_bpf can be lockless in packet processing.
Also similar to gact/mirred there is a race between prog->filter and
prog->tcf_action. Meaning that the program being replaced may use
previous default action if it happened to return TC_ACT_UNSPEC.
act_mirred race betwe
