Currently HW offload is accelerating only the rule matching sequence. Introduce a framework for offloading rule actions as a pre-step for processing the rule actions in HW. In case of a failure, fallback to the legacy partial offload scheme.
Note: a flow will be fully offloaded only if it can process all its actions in HW. Signed-off-by: Eli Britstein <[email protected]> Reviewed-by: Oz Shlomo <[email protected]> --- lib/netdev-offload-dpdk.c | 101 +++++++++++++++++++++++++++++++++++++++------- 1 file changed, 86 insertions(+), 15 deletions(-) diff --git a/lib/netdev-offload-dpdk.c b/lib/netdev-offload-dpdk.c index e95db821e..905cf7f50 100644 --- a/lib/netdev-offload-dpdk.c +++ b/lib/netdev-offload-dpdk.c @@ -56,6 +56,7 @@ struct ufid_to_rte_flow_data { struct cmap_node node; ovs_u128 ufid; struct rte_flow *rte_flow; + bool actions_offloaded; }; /* Find rte_flow with @ufid. */ @@ -76,7 +77,7 @@ ufid_to_rte_flow_data_find(const ovs_u128 *ufid) static inline void ufid_to_rte_flow_associate(const ovs_u128 *ufid, - struct rte_flow *rte_flow) + struct rte_flow *rte_flow, bool actions_offloaded) { size_t hash = hash_bytes(ufid, sizeof *ufid, 0); struct ufid_to_rte_flow_data *data = xzalloc(sizeof *data); @@ -95,6 +96,7 @@ ufid_to_rte_flow_associate(const ovs_u128 *ufid, data->ufid = *ufid; data->rte_flow = rte_flow; + data->actions_offloaded = actions_offloaded; cmap_insert(&ufid_to_rte_flow, CONST_CAST(struct cmap_node *, &data->node), hash); @@ -692,6 +694,78 @@ add_flow_mark_rss_actions(struct flow_actions *actions, add_flow_action(actions, RTE_FLOW_ACTION_TYPE_END, NULL); } +static struct rte_flow * +netdev_offload_dpdk_mark_rss(struct flow_patterns *patterns, + struct netdev *netdev, + uint32_t flow_mark) +{ + struct flow_actions actions = { .actions = NULL, .cnt = 0 }; + const struct rte_flow_attr flow_attr = { + .group = 0, + .priority = 0, + .ingress = 1, + .egress = 0 + }; + struct rte_flow_error error; + struct rte_flow *flow; + + add_flow_mark_rss_actions(&actions, flow_mark, netdev); + + flow = netdev_offload_dpdk_flow_create(netdev, &flow_attr, patterns->items, + actions.actions, &error); + + free_flow_actions(&actions); + return flow; +} + +static int +parse_flow_actions(struct netdev *netdev OVS_UNUSED, + struct flow_actions *actions, + struct nlattr *nl_actions, + size_t nl_actions_len, + struct offload_info *info OVS_UNUSED) +{ + struct nlattr *nla; + size_t left; + + NL_ATTR_FOR_EACH_UNSAFE (nla, left, nl_actions, nl_actions_len) { + VLOG_DBG_RL(&rl, "Unsupported action type %d", nl_attr_type(nla)); + return -1; + } + + if (nl_actions_len == 0) { + VLOG_DBG_RL(&rl, "Unsupported action type drop"); + return -1; + } + + add_flow_action(actions, RTE_FLOW_ACTION_TYPE_END, NULL); + return 0; +} + +static struct rte_flow * +netdev_offload_dpdk_actions(struct netdev *netdev, + struct flow_patterns *patterns, + struct nlattr *nl_actions, + size_t actions_len, + struct offload_info *info) +{ + const struct rte_flow_attr flow_attr = { .ingress = 1, .transfer = 1 }; + struct flow_actions actions = { .actions = NULL, .cnt = 0 }; + struct rte_flow *flow = NULL; + struct rte_flow_error error; + int ret; + + ret = parse_flow_actions(netdev, &actions, nl_actions, actions_len, info); + if (ret) { + goto out; + } + flow = netdev_offload_dpdk_flow_create(netdev, &flow_attr, patterns->items, + actions.actions, &error); +out: + free_flow_actions(&actions); + return flow; +} + static int netdev_offload_dpdk_add_flow(struct netdev *netdev, const struct match *match, @@ -700,16 +774,9 @@ netdev_offload_dpdk_add_flow(struct netdev *netdev, const ovs_u128 *ufid, struct offload_info *info) { - const struct rte_flow_attr flow_attr = { - .group = 0, - .priority = 0, - .ingress = 1, - .egress = 0 - }; struct flow_patterns patterns = { .items = NULL, .cnt = 0 }; - struct flow_actions actions = { .actions = NULL, .cnt = 0 }; + bool actions_offloaded = true; struct rte_flow *flow; - struct rte_flow_error error; int ret = 0; ret = parse_flow_match(&patterns, match); @@ -717,22 +784,26 @@ netdev_offload_dpdk_add_flow(struct netdev *netdev, goto out; } - add_flow_mark_rss_actions(&actions, info->flow_mark, netdev); - - flow = netdev_offload_dpdk_flow_create(netdev, &flow_attr, patterns.items, - actions.actions, &error); + flow = netdev_offload_dpdk_actions(netdev, &patterns, nl_actions, + actions_len, info); + if (!flow) { + /* if we failed to offload the rule actions fallback to mark rss + * actions. + */ + flow = netdev_offload_dpdk_mark_rss(&patterns, netdev, info->flow_mark); + actions_offloaded = false; + } if (!flow) { ret = -1; goto out; } - ufid_to_rte_flow_associate(ufid, flow); + ufid_to_rte_flow_associate(ufid, flow, actions_offloaded); VLOG_DBG("%s: installed flow %p by ufid "UUID_FMT"\n", netdev_get_name(netdev), flow, UUID_ARGS((struct uuid *)ufid)); out: free_flow_patterns(&patterns); - free_flow_actions(&actions); return ret; } -- 2.14.5 _______________________________________________ dev mailing list [email protected] https://mail.openvswitch.org/mailman/listinfo/ovs-dev
