On Wed, Feb 08, 2017 at 05:29:18PM +0200, Roi Dayan wrote:
> From: Paul Blakey <pa...@mellanox.com>
>
> Add a new configuration tc-policy option that controls tc
> flower flag. Possible options are none, skip_sw, skip_hw.
> The default is none which is to insert the rule both to sw and hw.
> This option is only relevant if hw-offload is enabled.
>
> Signed-off-by: Paul Blakey <pa...@mellanox.com>
> Reviewed-by: Roi Dayan <r...@mellanox.com>
> ---
> lib/netdev.c | 6 ++++++
> lib/tc.c | 43 ++++++++++++++++++++++++++++++++++++++++++-
> lib/tc.h | 1 +
> vswitchd/vswitch.xml | 17 +++++++++++++++++
> 4 files changed, 66 insertions(+), 1 deletion(-)
>
> diff --git a/lib/netdev.c b/lib/netdev.c
> index ca727a5..d5935c3 100644
> --- a/lib/netdev.c
> +++ b/lib/netdev.c
> @@ -54,6 +54,9 @@
> #include "openvswitch/vlog.h"
> #include "flow.h"
> #include "util.h"
> +#ifdef __linux__
> +#include "tc.h"
> +#endif
>
> VLOG_DEFINE_THIS_MODULE(netdev);
>
> @@ -2115,6 +2118,9 @@ netdev_set_flow_api_enabled(const struct smap
> *ovs_other_config)
>
> VLOG_INFO("netdev: Flow API Enabled");
>
> + tc_set_policy(smap_get_def(ovs_other_config, "tc-policy",
> + TC_POLICY_DEFAULT));
> +
> ovsthread_once_done(&once);
> }
> }
> diff --git a/lib/tc.c b/lib/tc.c
> index 431242b..b2e3d21 100644
> --- a/lib/tc.c
> +++ b/lib/tc.c
> @@ -38,6 +38,14 @@ VLOG_DEFINE_THIS_MODULE(tc);
>
> static struct vlog_rate_limit parse_err = VLOG_RATE_LIMIT_INIT(5, 5);
>
> +enum tc_offload_policy {
> + TC_POLICY_NONE,
> + TC_POLICY_SKIP_SW,
> + TC_POLICY_SKIP_HW
> +};
> +
> +static enum tc_offload_policy tc_policy = TC_POLICY_NONE;
> +
> /* Returns tc handle 'major':'minor'. */
> unsigned int
> tc_make_handle(unsigned int major, unsigned int minor)
> @@ -719,6 +727,18 @@ tc_get_flower(int ifindex, int prio, int handle, struct
> tc_flower *flower)
> return error;
> }
>
> +static int
> +tc_get_tc_cls_policy(enum tc_offload_policy policy)
> +{
> + if (policy == TC_POLICY_SKIP_HW) {
> + return TCA_CLS_FLAGS_SKIP_HW;
> + } else if (policy == TC_POLICY_SKIP_SW) {
> + return TCA_CLS_FLAGS_SKIP_SW;
> + }
> +
> + return 0;
> +}
> +
> static void
> nl_msg_put_act_push_vlan(struct ofpbuf *request, uint16_t vid, uint8_t prio)
> {
> @@ -989,7 +1009,7 @@ nl_msg_put_flower_options(struct ofpbuf *request, struct
> tc_flower *flower)
> }
> }
>
> - nl_msg_put_u32(request, TCA_FLOWER_FLAGS, 0);
> + nl_msg_put_u32(request, TCA_FLOWER_FLAGS,
> tc_get_tc_cls_policy(tc_policy));
>
> if (flower->tunnel.tunnel) {
> nl_msg_put_flower_tunnel(request, flower);
> @@ -1033,3 +1053,24 @@ tc_replace_flower(int ifindex, uint16_t prio, uint32_t
> handle,
>
> return error;
> }
> +
> +void
> +tc_set_policy(const char *policy)
> +{
> + if (!policy) {
> + return;
> + }
> +
> + if (!strcmp(policy, "skip_sw")) {
> + tc_policy = TC_POLICY_SKIP_SW;
> + } else if (!strcmp(policy, "skip_hw")) {
> + tc_policy = TC_POLICY_SKIP_HW;
> + } else if (!strcmp(policy, "none")) {
> + tc_policy = TC_POLICY_NONE;
> + } else {
> + VLOG_WARN("tc: Invalid policy '%s'", policy);
> + return;
> + }
> +
> + VLOG_INFO("tc: Using policy '%s'", policy);
> +}
> diff --git a/lib/tc.h b/lib/tc.h
> index 5ca6c55..6f6cc09 100644
> --- a/lib/tc.h
> +++ b/lib/tc.h
> @@ -115,5 +115,6 @@ int tc_flush(int ifindex);
> int tc_dump_flower_start(int ifindex, struct nl_dump *dump);
> int parse_netlink_to_tc_flower(struct ofpbuf *reply,
> struct tc_flower *flower);
> +void tc_set_policy(const char *policy);
>
> #endif /* tc.h */
> diff --git a/vswitchd/vswitch.xml b/vswitchd/vswitch.xml
> index 942e68f..8b9bdcb 100644
> --- a/vswitchd/vswitch.xml
> +++ b/vswitchd/vswitch.xml
> @@ -183,6 +183,23 @@
> </p>
> </column>
>
> + <column name="other_config" key="tc-policy"
> + type='{"type": "string"}'>
> + <p>
> + Specified the policy used with HW offloading.
> + Options:
> + <code>none</code> - Add software rule and offload rule to
> HW.
> + <code>skip_sw</code> - Offload rule to HW only.
> + <code>skip_hw</code> - Add software rule without offloading
> rule to HW.
> + </p>
> + <p>
> + This is only relevant if HW offloading is enabled (hw-offload).
> + </p>
> + <p>
> + The default value is <code>false</code>.
netdev_set_flow_api_enabled() seems to implement a default value of
<code>none</code>.
> + </p>
> + </column>
> +
> <column name="other_config" key="dpdk-init"
> type='{"type": "boolean"}'>
> <p>
> --
> 2.7.4
>
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