{"id":162559,"date":"2024-11-04T16:06:21","date_gmt":"2024-11-04T08:06:21","guid":{"rendered":"https:\/\/server.hk\/cnblog\/162559\/"},"modified":"2024-11-04T16:06:22","modified_gmt":"2024-11-04T08:06:22","slug":"%e7%b0%a1%e6%9e%90-xdp-%e7%9a%84%e9%87%8d%e5%ae%9a%e5%90%91%e6%a9%9f%e5%88%b6","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/162559\/","title":{"rendered":"\u7c21\u6790 XDP \u7684\u91cd\u5b9a\u5411\u6a5f\u5236"},"content":{"rendered":"<h1 id=\"%e7%b0%a1%e6%9e%90-xdp-%e7%9a%84%e9%87%8d%e5%ae%9a%e5%90%91%e6%a9%9f%e5%88%b6-LBDeForUIy\">\u7c21\u6790 XDP \u7684\u91cd\u5b9a\u5411\u6a5f\u5236<\/h1>\n<p>\u5728\u7576\u4eca\u7684\u7db2\u7d61\u74b0\u5883\u4e2d\uff0c\u6578\u64da\u5305\u7684\u8655\u7406\u901f\u5ea6\u548c\u6548\u7387\u81f3\u95dc\u91cd\u8981\u3002XDP\uff08eXpress Data Path\uff09\u4f5c\u70ba\u4e00\u7a2e\u9ad8\u6548\u7684\u6578\u64da\u5305\u8655\u7406\u6280\u8853\uff0c\u5df2\u7d93\u5728\u8a31\u591a\u7db2\u7d61\u61c9\u7528\u4e2d\u5f97\u5230\u4e86\u5ee3\u6cdb\u7684\u61c9\u7528\u3002\u672c\u6587\u5c07\u6df1\u5165\u63a2\u8a0e XDP \u7684\u91cd\u5b9a\u5411\u6a5f\u5236\uff0c\u4e26\u5206\u6790\u5176\u5728\u7db2\u7d61\u6027\u80fd\u512a\u5316\u4e2d\u7684\u91cd\u8981\u6027\u3002<\/p>\n<h2 id=\"xdp-%e7%9a%84%e5%9f%ba%e6%9c%ac%e6%a6%82%e5%bf%b5-LBDeForUIy\">XDP \u7684\u57fa\u672c\u6982\u5ff5<\/h2>\n<p>XDP \u662f\u4e00\u7a2e\u5728 Linux \u6838\u5fc3\u4e2d\u5be6\u73fe\u7684\u6578\u64da\u5305\u8655\u7406\u6846\u67b6\uff0c\u65e8\u5728\u63d0\u9ad8\u6578\u64da\u5305\u7684\u8655\u7406\u901f\u5ea6\u3002\u5b83\u5141\u8a31\u7528\u6236\u5728\u7db2\u7d61\u63a5\u53e3\u5361\uff08NIC\uff09\u4e0a\u76f4\u63a5\u8655\u7406\u6578\u64da\u5305\uff0c\u5f9e\u800c\u6e1b\u5c11\u4e86\u50b3\u7d71\u6578\u64da\u5305\u8655\u7406\u904e\u7a0b\u4e2d\u7684\u5ef6\u9072\u3002XDP \u7684\u8a2d\u8a08\u7406\u5ff5\u662f\u5c07\u6578\u64da\u5305\u8655\u7406\u7684\u908f\u8f2f\u79fb\u5230 NIC \u4e0a\uff0c\u9019\u6a23\u53ef\u4ee5\u5728\u6578\u64da\u5305\u5230\u9054\u6838\u5fc3\u4e4b\u524d\u9032\u884c\u5feb\u901f\u8655\u7406\u3002<\/p>\n<h2 id=\"xdp-%e7%9a%84%e9%87%8d%e5%ae%9a%e5%90%91%e6%a9%9f%e5%88%b6-LBDeForUIy\">XDP \u7684\u91cd\u5b9a\u5411\u6a5f\u5236<\/h2>\n<p>XDP \u7684\u91cd\u5b9a\u5411\u6a5f\u5236\u5141\u8a31\u7528\u6236\u5c07\u63a5\u6536\u5230\u7684\u6578\u64da\u5305\u91cd\u5b9a\u5411\u5230\u5176\u4ed6\u7db2\u7d61\u63a5\u53e3\u6216\u7528\u6236\u7a7a\u9593\u61c9\u7528\u7a0b\u5e8f\u3002\u9019\u4e00\u6a5f\u5236\u7684\u4e3b\u8981\u512a\u52e2\u5728\u65bc\u5b83\u80fd\u5920\u5728\u4e0d\u9032\u5165\u6838\u5fc3\u7684\u60c5\u6cc1\u4e0b\uff0c\u5feb\u901f\u5730\u5c07\u6578\u64da\u5305\u8f49\u767c\u5230\u6307\u5b9a\u7684\u76ee\u7684\u5730\u3002<\/p>\n<h3 id=\"%e9%87%8d%e5%ae%9a%e5%90%91%e7%9a%84%e5%b7%a5%e4%bd%9c%e5%8e%9f%e7%90%86-LBDeForUIy\">\u91cd\u5b9a\u5411\u7684\u5de5\u4f5c\u539f\u7406<\/h3>\n<p>\u7576\u4e00\u500b\u6578\u64da\u5305\u5230\u9054 NIC \u6642\uff0cXDP \u6703\u9996\u5148\u6355\u7372\u9019\u500b\u6578\u64da\u5305\u3002\u6839\u64da\u7528\u6236\u5b9a\u7fa9\u7684 XDP \u7a0b\u5e8f\uff0cXDP \u53ef\u4ee5\u6c7a\u5b9a\u5982\u4f55\u8655\u7406\u9019\u500b\u6578\u64da\u5305\u3002\u91cd\u5b9a\u5411\u7684\u904e\u7a0b\u901a\u5e38\u6d89\u53ca\u4ee5\u4e0b\u5e7e\u500b\u6b65\u9a5f\uff1a<\/p>\n<ul>\n<li>\u6355\u7372\u6578\u64da\u5305\uff1aXDP \u7a0b\u5e8f\u5728 NIC \u4e0a\u904b\u884c\uff0c\u6355\u7372\u5230\u9054\u7684\u6578\u64da\u5305\u3002<\/li>\n<li>\u8655\u7406\u6578\u64da\u5305\uff1a\u6839\u64da\u7528\u6236\u7684\u908f\u8f2f\uff0c\u5c0d\u6578\u64da\u5305\u9032\u884c\u5fc5\u8981\u7684\u8655\u7406\uff0c\u4f8b\u5982\u904e\u6ffe\u6216\u4fee\u6539\u3002<\/li>\n<li>\u91cd\u5b9a\u5411\u6578\u64da\u5305\uff1a\u4f7f\u7528 XDP \u63d0\u4f9b\u7684 API \u5c07\u6578\u64da\u5305\u91cd\u5b9a\u5411\u5230\u53e6\u4e00\u500b\u7db2\u7d61\u63a5\u53e3\u6216\u7528\u6236\u7a7a\u9593\u3002<\/li>\n<\/ul>\n<h3 id=\"%e9%87%8d%e5%ae%9a%e5%90%91%e7%9a%84%e5%af%a6%e7%8f%be%e7%a4%ba%e4%be%8b-LBDeForUIy\">\u91cd\u5b9a\u5411\u7684\u5be6\u73fe\u793a\u4f8b<\/h3>\n<p>\u4ee5\u4e0b\u662f\u4e00\u500b\u7c21\u55ae\u7684 XDP \u7a0b\u5e8f\u793a\u4f8b\uff0c\u5c55\u793a\u4e86\u5982\u4f55\u5be6\u73fe\u6578\u64da\u5305\u7684\u91cd\u5b9a\u5411\uff1a<\/p>\n<pre><code>\n#include &lt;linux\/bpf.h&gt;\n#include &lt;linux\/if_ether.h&gt;\n#include &lt;linux\/ip.h&gt;\n#include &lt;linux\/udp.h&gt;\n#include &lt;linux\/xdp.h&gt;\n\nSEC(\"filter\/xdp_redirect\")\nint xdp_redirect(struct xdp_md *ctx) {\n    \/\/ \u7372\u53d6\u6578\u64da\u5305\u7684\u6307\u91dd\n    void *data = (void *)(long)ctx-&gt;data;\n    struct ethhdr *eth = data;\n\n    \/\/ \u6aa2\u67e5\u4ee5\u592a\u7db2\u5e40\u985e\u578b\n    if (eth-&gt;h_proto == htons(ETH_P_IP)) {\n        \/\/ \u91cd\u5b9a\u5411\u5230\u53e6\u4e00\u500b\u63a5\u53e3\n        return XDP_REDIRECT;\n    }\n\n    return XDP_PASS;\n}\n<\/code><\/pre>\n<p>\u5728\u9019\u500b\u793a\u4f8b\u4e2d\uff0c\u7576\u63a5\u6536\u5230 IP \u6578\u64da\u5305\u6642\uff0cXDP \u7a0b\u5e8f\u6703\u5c07\u5176\u91cd\u5b9a\u5411\u5230\u53e6\u4e00\u500b\u63a5\u53e3\u3002\u9019\u6a23\u7684\u8655\u7406\u65b9\u5f0f\u80fd\u5920\u986f\u8457\u63d0\u9ad8\u6578\u64da\u5305\u7684\u8655\u7406\u6548\u7387\u3002<\/p>\n<h2 id=\"xdp-%e9%87%8d%e5%ae%9a%e5%90%91%e7%9a%84%e6%87%89%e7%94%a8%e5%a0%b4%e6%99%af-LBDeForUIy\">XDP \u91cd\u5b9a\u5411\u7684\u61c9\u7528\u5834\u666f<\/h2>\n<p>XDP \u7684\u91cd\u5b9a\u5411\u6a5f\u5236\u5728\u591a\u7a2e\u5834\u666f\u4e2d\u90fd\u80fd\u767c\u63ee\u91cd\u8981\u4f5c\u7528\uff0c\u5305\u62ec\uff1a<\/p>\n<ul>\n<li><strong>\u6d41\u91cf\u76e3\u63a7\uff1a<\/strong>\u901a\u904e\u5c07\u7279\u5b9a\u6d41\u91cf\u91cd\u5b9a\u5411\u5230\u76e3\u63a7\u7cfb\u7d71\uff0c\u53ef\u4ee5\u5be6\u6642\u5206\u6790\u7db2\u7d61\u6d41\u91cf\u3002<\/li>\n<li><strong>\u8ca0\u8f09\u5747\u8861\uff1a<\/strong>\u5c07\u6d41\u91cf\u91cd\u5b9a\u5411\u5230\u4e0d\u540c\u7684\u670d\u52d9\u5668\uff0c\u4ee5\u5be6\u73fe\u8ca0\u8f09\u5747\u8861\uff0c\u63d0\u9ad8\u7cfb\u7d71\u7684\u53ef\u7528\u6027\u3002<\/li>\n<li><strong>\u5b89\u5168\u9632\u8b77\uff1a<\/strong>\u5c0d\u53ef\u7591\u6d41\u91cf\u9032\u884c\u91cd\u5b9a\u5411\uff0c\u9032\u884c\u6df1\u5ea6\u6aa2\u67e5\u6216\u4e1f\u68c4\u3002<\/li>\n<\/ul>\n<h2 id=\"%e7%b8%bd%e7%b5%90-LBDeForUIy\">\u7e3d\u7d50<\/h2>\n<p>XDP \u7684\u91cd\u5b9a\u5411\u6a5f\u5236\u70ba\u7db2\u7d61\u6578\u64da\u5305\u7684\u8655\u7406\u63d0\u4f9b\u4e86\u4e00\u7a2e\u9ad8\u6548\u7684\u89e3\u6c7a\u65b9\u6848\u3002\u901a\u904e\u5c07\u6578\u64da\u5305\u8655\u7406\u908f\u8f2f\u79fb\u81f3 NIC\uff0cXDP \u80fd\u5920\u986f\u8457\u964d\u4f4e\u5ef6\u9072\u4e26\u63d0\u9ad8\u6574\u9ad4\u6027\u80fd\u3002\u96a8\u8457\u7db2\u7d61\u6280\u8853\u7684\u767c\u5c55\uff0cXDP \u5c07\u5728\u66f4\u591a\u7684\u61c9\u7528\u5834\u666f\u4e2d\u767c\u63ee\u5176\u6f5b\u529b\uff0c\u6210\u70ba\u7db2\u7d61\u6027\u80fd\u512a\u5316\u7684\u91cd\u8981\u5de5\u5177\u3002<\/p>\n<p>\u5982\u679c\u60a8\u5c0d\u65bc <a href=\"https:\/\/server.hk\">\u9999\u6e2fVPS<\/a> \u53ca\u5176\u76f8\u95dc\u6280\u8853\u6709\u8208\u8da3\uff0c\u6b61\u8fce\u8a2a\u554f\u6211\u5011\u7684\u7db2\u7ad9\u4ee5\u7372\u53d6\u66f4\u591a\u8cc7\u8a0a\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u7c21\u6790 XDP \u7684\u91cd\u5b9a\u5411\u6a5f\u5236\uff0c\u63a2\u8a0e\u5176\u5728\u9ad8\u6548\u80fd\u7db2\u8def\u6578\u64da\u8655\u7406\u4e2d\u7684\u61c9\u7528\u8207\u512a\u52e2\u3002<\/p>\n","protected":false},"author":0,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[101],"tags":[],"class_list":["post-162559","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/162559","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/types\/post"}],"replies":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/comments?post=162559"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/162559\/revisions"}],"predecessor-version":[{"id":162560,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/162559\/revisions\/162560"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=162559"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=162559"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=162559"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}