From: David S. Miller Date: Mon, 30 Jul 2018 16:31:14 +0000 (-0700) Subject: Merge branch 'TC-refactor-act_mirred-packets-re-injection' X-Git-Tag: v4.19-rc1~140^2~193 X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=8f3f6500c74935bfe5a9067e3106b806f336facf;p=thirdparty%2Flinux.git Merge branch 'TC-refactor-act_mirred-packets-re-injection' Paolo Abeni says: ==================== TC: refactor act_mirred packets re-injection This series is aimed at improving the act_mirred redirect performances. Such action is used by OVS to represent TC S/W flows, and it's current largest bottle-neck is the need for a skb_clone() for each packet. The first 2 patches introduce some cleanup and safeguards to allow extending tca_result - we will use it to store RCU protected redirect information - and introduce a clear separation between user-space accessible tcfa_action values and internal values accessible only by the kernel. Then a new tcfa_action value is introduced: TC_ACT_REINJECT, similar to TC_ACT_REDIRECT, but preserving the mirred semantic. Such value is not accessible from user-space. The last patch exploits the newly introduced infrastructure in the act_mirred action, to avoid a skb_clone, when possible. Overall this the above gives a ~10% performance improvement in forwarding tput, when using the TC S/W datapath. v1 -> v2: - preserve the rcu lock in act_bpf - add and use a new action value to reinject the packets, preserving the mirred semantic v2 -> v3: - renamed to new action as TC_ACT_REINJECT - TC_ACT_REINJECT is not exposed to user-space v3 -> v4: - dropped the TC_ACT_REDIRECT patch - report failure via extack, too - rename the new action as TC_ACT_REINSERT - skip clone only if the control action don't touch tcf_result v4 -> v5: - fix a couple of build issue reported by kbuild bot - dont split messages ==================== Signed-off-by: David S. Miller --- 8f3f6500c74935bfe5a9067e3106b806f336facf