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GET /api/patches/2308/?format=api
https://patches.dpdk.org/api/patches/2308/?format=api", "web_url": "https://patches.dpdk.org/project/dpdk/patch/1421298930-15210-6-git-send-email-changchun.ouyang@intel.com/", "project": { "id": 1, "url": "https://patches.dpdk.org/api/projects/1/?format=api", "name": "DPDK", "link_name": "dpdk", "list_id": "dev.dpdk.org", "list_email": "dev@dpdk.org", "web_url": "http://core.dpdk.org", "scm_url": "git://dpdk.org/dpdk", "webscm_url": "http://git.dpdk.org/dpdk", "list_archive_url": "https://inbox.dpdk.org/dev", "list_archive_url_format": "https://inbox.dpdk.org/dev/{}", "commit_url_format": "" }, "msgid": "<1421298930-15210-6-git-send-email-changchun.ouyang@intel.com>", "list_archive_url": "https://inbox.dpdk.org/dev/1421298930-15210-6-git-send-email-changchun.ouyang@intel.com", "date": "2015-01-15T05:15:13", "name": "[dpdk-dev,05/22] ether: Add soft vlan encap/decap functions", "commit_ref": null, "pull_url": null, "state": "superseded", "archived": true, "hash": "378d2412870d81c5c1c12eca2d614a466acb4db7", "submitter": { "id": 31, "url": "https://patches.dpdk.org/api/people/31/?format=api", "name": "Ouyang Changchun", "email": "changchun.ouyang@intel.com" }, "delegate": null, "mbox": "https://patches.dpdk.org/project/dpdk/patch/1421298930-15210-6-git-send-email-changchun.ouyang@intel.com/mbox/", "series": [], "comments": "https://patches.dpdk.org/api/patches/2308/comments/", "check": "pending", "checks": "https://patches.dpdk.org/api/patches/2308/checks/", "tags": {}, "related": [], "headers": { "Return-Path": "<dev-bounces@dpdk.org>", "X-Original-To": "patchwork@dpdk.org", "Delivered-To": "patchwork@dpdk.org", "Received": [ "from [92.243.14.124] (localhost [IPv6:::1])\n\tby dpdk.org (Postfix) with ESMTP id 3F0185AA1;\n\tThu, 15 Jan 2015 06:16:01 +0100 (CET)", "from mga11.intel.com (mga11.intel.com [192.55.52.93])\n\tby dpdk.org (Postfix) with ESMTP id 8BE4A5686\n\tfor <dev@dpdk.org>; Thu, 15 Jan 2015 06:15:54 +0100 (CET)", "from fmsmga002.fm.intel.com ([10.253.24.26])\n\tby fmsmga102.fm.intel.com with ESMTP; 14 Jan 2015 21:15:54 -0800", "from shvmail01.sh.intel.com ([10.239.29.42])\n\tby fmsmga002.fm.intel.com with ESMTP; 14 Jan 2015 21:15:53 -0800", "from shecgisg004.sh.intel.com (shecgisg004.sh.intel.com\n\t[10.239.29.89])\n\tby shvmail01.sh.intel.com with ESMTP id t0F5FkRJ032081;\n\tThu, 15 Jan 2015 13:15:46 +0800", "from shecgisg004.sh.intel.com (localhost [127.0.0.1])\n\tby shecgisg004.sh.intel.com (8.13.6/8.13.6/SuSE Linux 0.8) with ESMTP\n\tid t0F5Fhe0015278; Thu, 15 Jan 2015 13:15:45 +0800", "(from couyang@localhost)\n\tby shecgisg004.sh.intel.com (8.13.6/8.13.6/Submit) id t0F5FhRE015274; \n\tThu, 15 Jan 2015 13:15:43 +0800" ], "X-ExtLoop1": "1", "X-IronPort-AV": "E=Sophos;i=\"5.09,401,1418112000\"; d=\"scan'208\";a=\"662127847\"", "From": "Ouyang Changchun <changchun.ouyang@intel.com>", "To": "dev@dpdk.org", "Date": "Thu, 15 Jan 2015 13:15:13 +0800", "Message-Id": "<1421298930-15210-6-git-send-email-changchun.ouyang@intel.com>", "X-Mailer": "git-send-email 1.7.12.2", "In-Reply-To": "<1421298930-15210-1-git-send-email-changchun.ouyang@intel.com>", "References": "<1421298930-15210-1-git-send-email-changchun.ouyang@intel.com>", "Subject": "[dpdk-dev] [PATCH 05/22] ether: Add soft vlan encap/decap functions", "X-BeenThere": "dev@dpdk.org", "X-Mailman-Version": "2.1.15", "Precedence": "list", "List-Id": "patches and discussions about DPDK <dev.dpdk.org>", "List-Unsubscribe": "<http://dpdk.org/ml/options/dev>,\n\t<mailto:dev-request@dpdk.org?subject=unsubscribe>", "List-Archive": "<http://dpdk.org/ml/archives/dev/>", "List-Post": "<mailto:dev@dpdk.org>", "List-Help": "<mailto:dev-request@dpdk.org?subject=help>", "List-Subscribe": "<http://dpdk.org/ml/listinfo/dev>,\n\t<mailto:dev-request@dpdk.org?subject=subscribe>", "Errors-To": "dev-bounces@dpdk.org", "Sender": "\"dev\" <dev-bounces@dpdk.org>" }, "content": "It is helpful to allow device drivers that don't support hardware\nVLAN stripping to emulate this in software. This allows application\nto be device independent.\n\nAvoid discarding shared mbufs. Make a copy in rte_vlan_insert() of any\npacket to be tagged that has a reference count > 1.\n\nSigned-off-by: Stephen Hemminger <stephen@networkplumber.org>\nSigned-off-by: Changchun Ouyang <changchun.ouyang@intel.com>\n---\n lib/librte_ether/rte_ether.h | 76 ++++++++++++++++++++++++++++++++++++++++++++\n 1 file changed, 76 insertions(+)", "diff": "diff --git a/lib/librte_ether/rte_ether.h b/lib/librte_ether/rte_ether.h\nindex 187608d..3b6ab4b 100644\n--- a/lib/librte_ether/rte_ether.h\n+++ b/lib/librte_ether/rte_ether.h\n@@ -49,6 +49,8 @@ extern \"C\" {\n \n #include <rte_memcpy.h>\n #include <rte_random.h>\n+#include <rte_mbuf.h>\n+#include <rte_byteorder.h>\n \n #define ETHER_ADDR_LEN 6 /**< Length of Ethernet address. */\n #define ETHER_TYPE_LEN 2 /**< Length of Ethernet type field. */\n@@ -332,6 +334,80 @@ struct vxlan_hdr {\n #define ETHER_VXLAN_HLEN (sizeof(struct udp_hdr) + sizeof(struct vxlan_hdr))\n /**< VXLAN tunnel header length. */\n \n+/**\n+ * Extract VLAN tag information into mbuf\n+ *\n+ * Software version of VLAN stripping\n+ *\n+ * @param m\n+ * The packet mbuf.\n+ * @return\n+ * - 0: Success\n+ * - 1: not a vlan packet\n+ */\n+static inline int rte_vlan_strip(struct rte_mbuf *m)\n+{\n+\tstruct ether_hdr *eh\n+\t\t = rte_pktmbuf_mtod(m, struct ether_hdr *);\n+\n+\tif (eh->ether_type != ETHER_TYPE_VLAN)\n+\t\treturn -1;\n+\n+\tstruct vlan_hdr *vh = (struct vlan_hdr *)(eh + 1);\n+\tm->ol_flags |= PKT_RX_VLAN_PKT;\n+\tm->vlan_tci = rte_be_to_cpu_16(vh->vlan_tci);\n+\n+\t/* Copy ether header over rather than moving whole packet */\n+\tmemmove(rte_pktmbuf_adj(m, sizeof(struct vlan_hdr)),\n+\t\teh, 2 * ETHER_ADDR_LEN);\n+\n+\treturn 0;\n+}\n+\n+/**\n+ * Insert VLAN tag into mbuf.\n+ *\n+ * Software version of VLAN unstripping\n+ *\n+ * @param m\n+ * The packet mbuf.\n+ * @return\n+ * - 0: On success\n+ * -EPERM: mbuf is is shared overwriting would be unsafe\n+ * -ENOSPC: not enough headroom in mbuf\n+ */\n+static inline int rte_vlan_insert(struct rte_mbuf **m)\n+{\n+\tstruct ether_hdr *oh, *nh;\n+\tstruct vlan_hdr *vh;\n+\n+#ifdef RTE_MBUF_REFCNT\n+\t/* Can't insert header if mbuf is shared */\n+\tif (rte_mbuf_refcnt_read(*m) > 1) {\n+\t\tstruct rte_mbuf *copy;\n+\n+\t\tcopy = rte_pktmbuf_clone(*m, (*m)->pool);\n+\t\tif (unlikely(copy == NULL))\n+\t\t\treturn -ENOMEM;\n+\t\trte_pktmbuf_free(*m);\n+\t\t*m = copy;\n+\t}\n+#endif\n+\toh = rte_pktmbuf_mtod(*m, struct ether_hdr *);\n+\tnh = (struct ether_hdr *)\n+\t\trte_pktmbuf_prepend(*m, sizeof(struct vlan_hdr));\n+\tif (nh == NULL)\n+\t\treturn -ENOSPC;\n+\n+\tmemmove(nh, oh, 2 * ETHER_ADDR_LEN);\n+\tnh->ether_type = ETHER_TYPE_VLAN;\n+\n+\tvh = (struct vlan_hdr *) (nh + 1);\n+\tvh->vlan_tci = rte_cpu_to_be_16((*m)->vlan_tci);\n+\n+\treturn 0;\n+}\n+\n #ifdef __cplusplus\n }\n #endif\n", "prefixes": [ "dpdk-dev", "05/22" ] }{ "id": 2308, "url": "