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 9396C41D63; Fri, 24 Feb 2023 12:06:30 +0100 (CET) Received: from mails.dpdk.org (localhost [127.0.0.1]) by mails.dpdk.org (Postfix) with ESMTP id 73AD040697; Fri, 24 Feb 2023 12:06:30 +0100 (CET) Received: from mail-wm1-f53.google.com (mail-wm1-f53.google.com [209.85.128.53]) by mails.dpdk.org (Postfix) with ESMTP id 1D55240693 for ; Fri, 24 Feb 2023 12:06:29 +0100 (CET) Received: by mail-wm1-f53.google.com with SMTP id d41-20020a05600c4c2900b003e9e066550fso1488847wmp.4 for ; Fri, 24 Feb 2023 03:06:29 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20210112; h=content-transfer-encoding:mime-version:message-id:date:subject:cc :to:from:from:to:cc:subject:date:message-id:reply-to; bh=NpwUD7q1UT78xG4hzHuN3KGwnr20rw/6fGf1ERB3cA0=; b=SvKB7IMyX2KfJY5iKJpwHPjOC2q1IJJ5JubBTxr9X6XF3rhoXLf4nLt7ryCP/h1FJ2 51G6rtTocxbjjbi10qSyWgcSoLGOCQs5ldSxCGZgYuBiIRTFRvSCh7w99NrGE5mv8h+3 Xzy9uDqX/KIINCIQ7cQ9997G+GBwovM1PTY/7VxzSnXUMjLzTsX3nOvxRa66VXA+UeKg 9KbPs5bXKJGWQ+ypgCgFe5yESPhlmgp8t+NQy7TvEYrTubYSY4YH7l125pwVRTwcZXgz VJlHimwoFxzbTCXudjdr3C8Kvtqxj/oHlilKjmK5/EwIHDUjKvdQRTC+XCBefiEzM8Wk Yj3Q== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=content-transfer-encoding:mime-version:message-id:date:subject:cc :to:from:x-gm-message-state:from:to:cc:subject:date:message-id :reply-to; bh=NpwUD7q1UT78xG4hzHuN3KGwnr20rw/6fGf1ERB3cA0=; b=W7l69QS47hg5UHeqXohlrzMeafsUzO8DKyPFgoRIHSSxbZ55sxMKs7sn6Jgx4d3SRl 9cFFmjd/ssYT0JCsZta1wd1qFKjjxli4P1HVquhMDKa5G1b7MMyLIE1O8r7mEHRp8BI2 rBs1BnMZNx3XJmBs0J8b9aHcwQCe2zBvmIW2n5GGwzvEVyBEfeMDfFf/bJ41fsFdy630 JxYgerhcBfx3uvuLFwtPIVmkWOrJ7KPkfT+WFLbnOLHvGsPd9nFwom5GRK+5d3qoY6jC j8LvZ6rw5sqMNvlfMbMRv9W5nzj6g5HLuT71vjIADr9E3ZxJ+pBEno4BMircFy5mzV71 G1Nw== X-Gm-Message-State: AO0yUKXzqtW1n+OtIIW44uQDM1vJuH/mO+Pmdg6wWYLdOfvqRfYq+//I 2xAPiljvz3EOIjKlDROvYks= X-Google-Smtp-Source: AK7set/PnmTcXqfH7iaEGE4izVPr3UvVHADcd4TbogrTanyvrOz3ffJdvyukSWz/+wlSe4tSGf2AtA== X-Received: by 2002:a05:600c:1d0a:b0:3ea:c654:acf1 with SMTP id l10-20020a05600c1d0a00b003eac654acf1mr3226792wms.3.1677236788717; Fri, 24 Feb 2023 03:06:28 -0800 (PST) Received: from DESKTOP-KPIMD3E.localdomain ([2407:d000:f:9db9:a92c:5562:804c:14b1]) by smtp.gmail.com with ESMTPSA id q15-20020a05600000cf00b002c559843748sm13880991wrx.10.2023.02.24.03.06.27 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 24 Feb 2023 03:06:28 -0800 (PST) From: Tanzeel-inline To: olivier.matz@6wind.com, thomas@monjalon.net, tanzeelahmed713@gmail.com Cc: dev@dpdk.org, Tanzeel Ahmed Subject: [PATCH v3] lib/net: add MPLS insert and strip functionality Date: Fri, 24 Feb 2023 16:06:19 +0500 Message-Id: <20230224110619.665-1-tanxeel1.ahmed@gmail.com> X-Mailer: git-send-email 2.34.1 MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 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 From: Tanzeel Ahmed This patch is new version of [PATCH] lib/net: added push MPLS header API. I have also added the MPLS strip functionality to address the question asked in last patch. > You should explain why you add this function. None of the foundational NICs currently supports MPLS insertion and stripping, this functionality can help users who rely on MPLS in their network application. > I'm not sure it should be inline I did for performance in high-traffic application. Signed-off-by: Tanzeel Ahmed --- v3: * fixed patch checks failure v2: * marked experimental * coding style fixed * changed rte_memcpy to memcpy * mpls header marked as const in parameter * added MPLS stripping functionality --- .mailmap | 1 + lib/net/rte_mpls.h | 97 ++++++++++++++++++++++++++++++++++++++++++++++++++++++ 2 files changed, 98 insertions(+) diff --git a/.mailmap b/.mailmap index a9f4f28..2af4e0d 100644 --- a/.mailmap +++ b/.mailmap @@ -1312,6 +1312,7 @@ Takeshi Yoshimura Takuya Asada Tal Avraham Tal Shnaiderman +Tanzeel Ahmed Tao Y Yang Tao Zhu Taripin Samuel diff --git a/lib/net/rte_mpls.h b/lib/net/rte_mpls.h index 51523e7..14b55fe 100644 --- a/lib/net/rte_mpls.h +++ b/lib/net/rte_mpls.h @@ -13,6 +13,8 @@ #include #include +#include +#include #ifdef __cplusplus extern "C" { @@ -36,6 +38,101 @@ struct rte_mpls_hdr { uint8_t ttl; /**< Time to live. */ } __rte_packed; +#define RTE_MPLS_HLEN 4 /**< Length of MPLS header. */ + +/** + * @warning + * @b EXPERIMENTAL: this API may change without prior notice. + * + * Insert MPLS header into the packet. + * If it's first MPLS header to be inserted in the packet, + * - Updates the ether type. + * - Sets the MPLS bottom-of-stack bit to 1. + * + * @param m + * The pointer to the mbuf. + * @param mp + * The pointer to the MPLS header. + * @return + * 0 on success, -1 on error + */ +__rte_experimental +static inline int +rte_mpls_push_over_l2(struct rte_mbuf **m, const struct rte_mpls_hdr *mp) +{ + struct rte_ether_hdr *oh, *nh; + struct rte_mpls_hdr *mph; + + /* Can't insert header if mbuf is shared */ + if (!RTE_MBUF_DIRECT(*m) || rte_mbuf_refcnt_read(*m) > 1) + return -EINVAL; + + /* Can't insert header if ethernet frame doesn't exist */ + if (rte_pktmbuf_data_len(*m) < RTE_ETHER_HDR_LEN) + return -EINVAL; + + oh = rte_pktmbuf_mtod(*m, struct rte_ether_hdr *); + nh = (struct rte_ether_hdr *)(void *) + rte_pktmbuf_prepend(*m, sizeof(struct rte_mpls_hdr)); + if (nh == NULL) + return -ENOSPC; + + memmove(nh, oh, RTE_ETHER_HDR_LEN); + + /* Copy the MPLS header after ethernet frame */ + mph = rte_pktmbuf_mtod_offset(*m, struct rte_mpls_hdr*, + sizeof(struct rte_ether_hdr)); + memcpy(mph, mp, RTE_MPLS_HLEN); + + mph->tag_msb = rte_cpu_to_be_16(mp->tag_msb); + + /* If first MPLS header, update ether type and bottom-of-stack bit */ + if (nh->ether_type != rte_cpu_to_be_16(RTE_ETHER_TYPE_MPLS)) { + nh->ether_type = rte_cpu_to_be_16(RTE_ETHER_TYPE_MPLS); + mph->bs = 1; + } else { + mph->bs = 0; + } + + return 0; +} + +/** + * @warning + * @b EXPERIMENTAL: this API may change without prior notice. + * + * Strips MPLS from the packet. Doesn't update the ether type + * + * @param m + * The pointer to the mbuf. + * @return + * 0 on success, -1 on error + */ +__rte_experimental +static inline int +rte_mpls_strip_over_l2(struct rte_mbuf *m) +{ + struct rte_ether_hdr *eh = rte_pktmbuf_mtod(m, struct rte_ether_hdr *); + struct rte_mpls_hdr *mph; + bool mpls_exist = true; + + if (eh->ether_type != rte_cpu_to_be_16(RTE_ETHER_TYPE_MPLS)) + return -1; + + /* Stripping all MPLS header */ + while (mpls_exist) { + mph = rte_pktmbuf_mtod_offset(m, struct rte_mpls_hdr*, + sizeof(struct rte_ether_hdr)); + if (mph->bs & 1) + mpls_exist = false; + memmove(rte_pktmbuf_adj(m, sizeof(struct rte_mpls_hdr)), + eh, sizeof(struct rte_ether_hdr)); + eh = rte_pktmbuf_mtod(m, struct rte_ether_hdr *); + } + + return 0; +} + #ifdef __cplusplus } #endif -- 1.8.3.1