From 1848b117cca159cc4e5f287876491e86e3413f21 Mon Sep 17 00:00:00 2001 From: Lijun Ou Date: Wed, 21 Oct 2020 18:07:10 +0800 Subject: [PATCH] app/testpmd: fix RSS key for flow API RSS rule When a flow API RSS rule is issued in testpmd, device RSS key is changed unexpectedly, device RSS key is changed to the testpmd default RSS key. Consider the following usage with testpmd: 1. first, startup testpmd: testpmd> show port 0 rss-hash key RSS functions: all ipv4-frag ipv4-other ipv6-frag ipv6-other ip RSS key: 6D5A56DA255B0EC24167253D43A38FB0D0CA2BCBAE7B30B477CB2DA38030F 20C6A42B73BBEAC01FA 2. create a rss rule testpmd> flow create 0 ingress pattern eth / ipv4 / udp / end \ actions rss types ipv4-udp end queues end / end 3. show rss-hash key testpmd> show port 0 rss-hash key RSS functions: all ipv4-udp udp RSS key: 74657374706D6427732064656661756C74205253532068617368206B65792 C206F76657272696465 This is because testpmd always sends a key with the RSS rule, if user provides a key as part of the rule that key is used, if user doesn't provide a key, testpmd default key is sent to the PMDs, which is causing device programmed RSS key to be changed. There was a previous attempt to fix the same issue [1], but it has been reverted back [2] because of the crash when 'key_len' is provided without 'key'. This patch follows the same approach with the initial fix [1] but also addresses the crash. After change, testpmd RSS key is 'NULL' by default, if user provides a key as part of rule it is used, if not no key is sent to the PMDs at all [1] Commit a4391f8bae85 ("app/testpmd: set default RSS key as null") [2] Commit f3698c3d09a6 ("app/testpmd: revert setting default RSS") Fixes: d0ad8648b1c5 ("app/testpmd: fix RSS flow action configuration") Cc: stable@dpdk.org Signed-off-by: Lijun Ou Signed-off-by: Ophir Munk Signed-off-by: Ferruh Yigit --- app/test-pmd/cmdline_flow.c | 19 ++----------------- lib/librte_ethdev/rte_flow.c | 2 +- 2 files changed, 3 insertions(+), 18 deletions(-) diff --git a/app/test-pmd/cmdline_flow.c b/app/test-pmd/cmdline_flow.c index cd35d5b9cc..3d1dd05953 100644 --- a/app/test-pmd/cmdline_flow.c +++ b/app/test-pmd/cmdline_flow.c @@ -4850,30 +4850,15 @@ parse_vc_action_rss(struct context *ctx, const struct token *token, .func = RTE_ETH_HASH_FUNCTION_DEFAULT, .level = 0, .types = rss_hf, - .key_len = sizeof(action_rss_data->key), + .key_len = 0, .queue_num = RTE_MIN(nb_rxq, ACTION_RSS_QUEUE_NUM), - .key = action_rss_data->key, + .key = NULL, .queue = action_rss_data->queue, }, - .key = "testpmd's default RSS hash key, " - "override it for better balancing", .queue = { 0 }, }; for (i = 0; i < action_rss_data->conf.queue_num; ++i) action_rss_data->queue[i] = i; - if (!port_id_is_invalid(ctx->port, DISABLED_WARN) && - ctx->port != (portid_t)RTE_PORT_ALL) { - struct rte_eth_dev_info info; - int ret2; - - ret2 = rte_eth_dev_info_get(ctx->port, &info); - if (ret2 != 0) - return ret2; - - action_rss_data->conf.key_len = - RTE_MIN(sizeof(action_rss_data->key), - info.hash_key_size); - } action->conf = &action_rss_data->conf; return ret; } diff --git a/lib/librte_ethdev/rte_flow.c b/lib/librte_ethdev/rte_flow.c index d3e5cbc194..a06f64c271 100644 --- a/lib/librte_ethdev/rte_flow.c +++ b/lib/librte_ethdev/rte_flow.c @@ -577,7 +577,7 @@ rte_flow_conv_action_conf(void *buf, const size_t size, }), size > sizeof(*dst.rss) ? sizeof(*dst.rss) : size); off = sizeof(*dst.rss); - if (src.rss->key_len) { + if (src.rss->key_len && src.rss->key) { off = RTE_ALIGN_CEIL(off, sizeof(*dst.rss->key)); tmp = sizeof(*src.rss->key) * src.rss->key_len; if (size >= off + tmp) -- 2.20.1