From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mails.dpdk.org (mails.dpdk.org [217.70.189.124]) by inbox.dpdk.org (Postfix) with ESMTP id E139BA0C4D; Fri, 13 Aug 2021 09:39:07 +0200 (CEST) Received: from [217.70.189.124] (localhost [127.0.0.1]) by mails.dpdk.org (Postfix) with ESMTP id 9FF7240151; Fri, 13 Aug 2021 09:38:59 +0200 (CEST) Received: from linux.microsoft.com (linux.microsoft.com [13.77.154.182]) by mails.dpdk.org (Postfix) with ESMTP id 752E64111C for ; Thu, 12 Aug 2021 22:17:57 +0200 (CEST) Received: by linux.microsoft.com (Postfix, from userid 1065) id 8F9C2209C3BB; Thu, 12 Aug 2021 13:17:56 -0700 (PDT) DKIM-Filter: OpenDKIM Filter v2.11.0 linux.microsoft.com 8F9C2209C3BB DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linux.microsoft.com; s=default; t=1628799476; bh=PVrbHzPtRu8hpnUnpD2FrQ925mcW8oDExHOA+1/B2w8=; h=From:To:Cc:Subject:Date:In-Reply-To:References:In-Reply-To: References:From; b=QXbDRDgDjhGjojEAdRh6h1Rm4cs+KAAy6iCXBGpcmYDtuMsnGst7D7UgWknToibuC 1Y1Zsu4GAdwLT7aju/CWnt9LGl7XEZ2CNrKW3+qnzPoIy/llLlvr9/JanGQtYH/otT xJIhUn9SZLSooN4c3fc8DzoTxReAvv4NCSGnTc8E= From: Sowmini Varadhan To: sowmini05@gmail.com, bernard.iremonger@intel.com, dev@dpdk.org, sovaradh@linux.microsoft.com Cc: thomas@monjalon.net Date: Thu, 12 Aug 2021 13:17:47 -0700 Message-Id: <6929785372a5bbaaa47a273163df7a53c2bf3203.1628796991.git.sovaradh@linux.microsoft.com> X-Mailer: git-send-email 1.8.3.1 In-Reply-To: References: In-Reply-To: References: X-Mailman-Approved-At: Fri, 13 Aug 2021 09:38:55 +0200 Subject: [dpdk-dev] [PATCH 1/2] Hooks to allow the setting of filters on tcp flags X-BeenThere: dev@dpdk.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: DPDK patches and discussions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dev-bounces@dpdk.org Sender: "dev" The rte_eth_ntuple_filter allows tcp_flags which can check for things like #define RTE_TCP_CWR_FLAG 0x80 /**< Congestion Window Reduced */ #define RTE_TCP_ECE_FLAG 0x40 /**< ECN-Echo */ #define RTE_TCP_URG_FLAG 0x20 /**< Urgent Pointer field significant */ #define RTE_TCP_ACK_FLAG 0x10 /**< Acknowledgment field significant */ #define RTE_TCP_PSH_FLAG 0x08 /**< Push Function */ #define RTE_TCP_RST_FLAG 0x04 /**< Reset the connection */ #define RTE_TCP_SYN_FLAG 0x02 /**< Synchronize sequence numbers */ #define RTE_TCP_FIN_FLAG 0x01 /**< No more data from sender */ but there are no existing examples that demonstrate how to use this feature. This patch extends the exisiting classification support to allow an optional flags in the input file. The flags string can be any concatenation of characters from {C, E, U, A, P, R, S, F} and "*" indicates "dont care". These flags are set in the ntuple_filter and are used to construct the tcp_spec and tcp_mask sent to the driver The rte_acl_field_def is updated to use the (u8) tcp flag as lookup key. Note that, as per https://doc.dpdk.org/guides/prog_guide/packet_classif_access_ctrl.html this field MUST be allocated fo4 4 bytes, thus it has sizeof(uint32_t). However, also note the XXX in this commit: additional updates are needed to the rte_flow_classify_table_entry_add() so that it does not ignore any key fields other than the 5-tuple. Signed-off-by: Sowmini Varadhan --- examples/flow_classify/flow_classify.c | 87 ++++++++++++++++++++-- examples/flow_classify/ipv4_rules_file.txt | 22 +++--- 2 files changed, 91 insertions(+), 18 deletions(-) diff --git a/examples/flow_classify/flow_classify.c b/examples/flow_classify/flow_classify.c index db71f5aa04..772b15adf2 100644 --- a/examples/flow_classify/flow_classify.c +++ b/examples/flow_classify/flow_classify.c @@ -51,6 +51,7 @@ enum { CB_FLD_DST_PORT_MASK, CB_FLD_PROTO, CB_FLD_PRIORITY, + CB_FLD_TCP_FLAGS, CB_FLD_NUM, }; @@ -86,6 +87,7 @@ enum { DST_FIELD_IPV4, SRCP_FIELD_IPV4, DSTP_FIELD_IPV4, + TCP_FLAGS_FIELD, NUM_FIELDS_IPV4 }; @@ -93,7 +95,8 @@ enum { PROTO_INPUT_IPV4, SRC_INPUT_IPV4, DST_INPUT_IPV4, - SRCP_DESTP_INPUT_IPV4 + SRCP_DESTP_INPUT_IPV4, + TCP_FLAGS_INDEX, }; static struct rte_acl_field_def ipv4_defs[NUM_FIELDS_IPV4] = { @@ -150,6 +153,17 @@ static struct rte_acl_field_def ipv4_defs[NUM_FIELDS_IPV4] = { sizeof(struct rte_ipv4_hdr) + offsetof(struct rte_tcp_hdr, dst_port), }, + /* next field must be 4 bytes, even though flags is only 1 byte */ + { + /* rte_flags */ + .type = RTE_ACL_FIELD_TYPE_BITMASK, + .size = sizeof(uint32_t), + .field_index = TCP_FLAGS_FIELD, + .input_index = TCP_FLAGS_INDEX, + .offset = sizeof(struct rte_ether_hdr) + + sizeof(struct rte_ipv4_hdr) + + offsetof(struct rte_tcp_hdr, tcp_flags), + }, }; /* >8 End of creation of ACL table. */ @@ -285,12 +299,14 @@ lcore_main(struct flow_classifier *cls_app) int ret; int i = 0; - ret = rte_flow_classify_table_entry_delete(cls_app->cls, - rules[7]); - if (ret) - printf("table_entry_delete failed [7] %d\n\n", ret); - else - printf("table_entry_delete succeeded [7]\n\n"); + if (rules[7]) { + ret = rte_flow_classify_table_entry_delete(cls_app->cls, + rules[7]); + if (ret) + printf("table_entry_delete failed [7] %d\n\n", ret); + else + printf("table_entry_delete succeeded [7]\n\n"); + } /* * Check that the port is on the same NUMA node as the polling thread @@ -410,6 +426,53 @@ parse_ipv4_net(char *in, uint32_t *addr, uint32_t *mask_len) return 0; } +static int +get_tcp_flags(char *in, struct rte_eth_ntuple_filter *ntuple_filter) +{ + int len = strlen(in); + int i; + uint8_t flags = 0; + + if (strcmp(in, "*") == 0) { + ntuple_filter->tcp_flags = 0; + return 0; + } + + for (i = 0; i < len; i++) { + switch (in[i]) { + case 'S': + flags |= RTE_TCP_SYN_FLAG; + break; + case 'F': + flags |= RTE_TCP_FIN_FLAG; + break; + case 'R': + flags |= RTE_TCP_RST_FLAG; + break; + case 'P': + flags |= RTE_TCP_PSH_FLAG; + break; + case 'A': + flags |= RTE_TCP_ACK_FLAG; + break; + case 'U': + flags |= RTE_TCP_URG_FLAG; + break; + case 'E': + flags |= RTE_TCP_ECE_FLAG; + break; + case 'C': + flags |= RTE_TCP_CWR_FLAG; + break; + default: + fprintf(stderr, "unknown flag %c\n", in[i]); + return -1; + } + } + ntuple_filter->tcp_flags = flags; + return 0; +} + static int parse_ipv4_5tuple_rule(char *str, struct rte_eth_ntuple_filter *ntuple_filter) { @@ -481,6 +544,8 @@ parse_ipv4_5tuple_rule(char *str, struct rte_eth_ntuple_filter *ntuple_filter) ntuple_filter->priority = (uint16_t)temp; if (ntuple_filter->priority > FLOW_CLASSIFY_MAX_PRIORITY) ret = -EINVAL; + if (get_tcp_flags(in[CB_FLD_TCP_FLAGS], ntuple_filter)) + return -EINVAL; return ret; } @@ -597,10 +662,13 @@ add_classify_rule(struct rte_eth_ntuple_filter *ntuple_filter, memset(&tcp_spec, 0, sizeof(tcp_spec)); tcp_spec.hdr.src_port = ntuple_filter->src_port; tcp_spec.hdr.dst_port = ntuple_filter->dst_port; + tcp_spec.hdr.tcp_flags = ntuple_filter->tcp_flags; memset(&tcp_mask, 0, sizeof(tcp_mask)); tcp_mask.hdr.src_port = ntuple_filter->src_port_mask; tcp_mask.hdr.dst_port = ntuple_filter->dst_port_mask; + if (tcp_spec.hdr.tcp_flags != 0) + tcp_mask.hdr.tcp_flags = 0xff; tcp_item.type = RTE_FLOW_ITEM_TYPE_TCP; tcp_item.spec = &tcp_spec; @@ -655,6 +723,11 @@ add_classify_rule(struct rte_eth_ntuple_filter *ntuple_filter, return ret; } + /* XXX but this only adds table_type of + * RTE_FLOW_CLASSIFY_TABLE_ACL_IP4_5TUPLE + * i.e., it only ever does allocate_acl_ipv4_5tuple_rule() + * so the tcp_flags is ignored! + */ rule = rte_flow_classify_table_entry_add( cls_app->cls, &attr, pattern_ipv4_5tuple, actions, &key_found, &error); diff --git a/examples/flow_classify/ipv4_rules_file.txt b/examples/flow_classify/ipv4_rules_file.txt index dfa0631fcc..415573732a 100644 --- a/examples/flow_classify/ipv4_rules_file.txt +++ b/examples/flow_classify/ipv4_rules_file.txt @@ -1,14 +1,14 @@ #file format: -#src_ip/masklen dst_ip/masklen src_port : mask dst_port : mask proto/mask priority +#src_ip/masklen dst_ip/masklen src_port : mask dst_port : mask proto/mask priority tcp_flags # -2.2.2.3/24 2.2.2.7/24 32 : 0xffff 33 : 0xffff 17/0xff 0 -9.9.9.3/24 9.9.9.7/24 32 : 0xffff 33 : 0xffff 17/0xff 1 -9.9.9.3/24 9.9.9.7/24 32 : 0xffff 33 : 0xffff 6/0xff 2 -9.9.8.3/24 9.9.8.7/24 32 : 0xffff 33 : 0xffff 6/0xff 3 -6.7.8.9/24 2.3.4.5/24 32 : 0x0000 33 : 0x0000 132/0xff 4 -6.7.8.9/32 192.168.0.36/32 10 : 0xffff 11 : 0xffff 6/0xfe 5 -6.7.8.9/24 192.168.0.36/24 10 : 0xffff 11 : 0xffff 6/0xfe 6 -6.7.8.9/16 192.168.0.36/16 10 : 0xffff 11 : 0xffff 6/0xfe 7 -6.7.8.9/8 192.168.0.36/8 10 : 0xffff 11 : 0xffff 6/0xfe 8 +2.2.2.3/24 2.2.2.7/24 32 : 0xffff 33 : 0xffff 17/0xff 0 * +9.9.9.3/24 9.9.9.7/24 32 : 0xffff 33 : 0xffff 17/0xff 1 * +9.9.9.3/24 9.9.9.7/24 32 : 0xffff 33 : 0xffff 6/0xff 2 * +9.9.8.3/24 9.9.8.7/24 32 : 0xffff 33 : 0xffff 6/0xff 3 * +6.7.8.9/24 2.3.4.5/24 32 : 0x0000 33 : 0x0000 132/0xff 4 * +6.7.8.9/32 192.168.0.36/32 10 : 0xffff 11 : 0xffff 6/0xfe 5 * +6.7.8.9/24 192.168.0.36/24 10 : 0xffff 11 : 0xffff 6/0xfe 6 * +6.7.8.9/16 192.168.0.36/16 10 : 0xffff 11 : 0xffff 6/0xfe 7 * +6.7.8.9/8 192.168.0.36/8 10 : 0xffff 11 : 0xffff 6/0xfe 8 * #error rules -#9.8.7.6/8 192.168.0.36/8 10 : 0xffff 11 : 0xffff 6/0xfe 9 \ No newline at end of file +#9.8.7.6/8 192.168.0.36/8 10 : 0xffff 11 : 0xffff 6/0xfe 9 * -- 2.17.1