{"id":36554,"date":"2025-04-11T14:31:34","date_gmt":"2025-04-11T06:31:34","guid":{"rendered":"https:\/\/www.yunshan.net\/blog\/?p=36554"},"modified":"2025-04-11T14:31:34","modified_gmt":"2025-04-11T06:31:34","slug":"ebpf%e5%9c%a8linux%e5%86%85%e6%a0%b8%e4%b8%ad%e7%9a%84%e6%89%a7%e8%a1%8c%e6%9c%ba%e5%88%b6%e6%98%af%e4%bb%80%e4%b9%88%ef%bc%9f","status":"publish","type":"post","link":"https:\/\/www.yunshan.net\/blog\/archives\/36554.html","title":{"rendered":"eBPF\u5728Linux\u5185\u6838\u4e2d\u7684\u6267\u884c\u673a\u5236\u662f\u4ec0\u4e48\uff1f"},"content":{"rendered":"<p style=\"text-align: center;\">\n<p><img decoding=\"async\" src=\"https:\/\/www.yunshan.net\/blog\/wp-content\/uploads\/2025\/04\/7k0lO7w5.jpg\" alt=\"eBPF\u5728Linux\u5185\u6838\u4e2d\u7684\u6267\u884c\u673a\u5236\u662f\u4ec0\u4e48\uff1f\" ><\/p>\n<\/p>\n<hr>\n<p>\u5728\u5f53\u4eca\u4e91\u8ba1\u7b97\u548c\u5fae\u670d\u52a1\u67b6\u6784\u76db\u884c\u7684\u65f6\u4ee3\uff0c<strong>Linux\u5185\u6838<\/strong>\u7684\u6bcf\u4e00\u6b21\u6280\u672f\u9769\u65b0\u90fd\u7275\u52a8\u7740\u5168\u7403\u5f00\u53d1\u8005\u7684\u795e\u7ecf\u3002\u5f53\u4f20\u7edf\u7684\u5185\u6838\u6a21\u5757\u5f00\u53d1\u56e0<strong>\u5b89\u5168\u98ce\u9669<\/strong>\u548c<strong>\u5f00\u53d1\u95e8\u69db<\/strong>\u9971\u53d7\u8bdf\u75c5\u65f6\uff0c\u4e00\u79cd\u540d\u4e3a<strong><a href=\"https:\/\/www.yunshan.net\/\"   target=\"_blank\" style=\"color:blue\">eBPF<\/a><\/strong>\uff08Extended Berkeley Packet Filter\uff09\u7684\u6280\u672f\u6084\u7136\u5d1b\u8d77\u3002\u5b83\u50cf\u4e00\u628a\u94a5\u5319\uff0c\u6253\u5f00\u4e86\u5728<strong>\u4e0d\u4fee\u6539\u5185\u6838\u6e90\u7801<\/strong>\u7684\u524d\u63d0\u4e0b\u52a8\u6001\u6ce8\u5165\u4ee3\u7801\u7684\u6f58\u591a\u62c9\u9b54\u76d2\u3002\u4f46\u8fd9\u573a\u9769\u547d\u80cc\u540e\u7684\u6267\u884c\u673a\u5236\u7a76\u7adf\u5982\u4f55\u8fd0\u8f6c\uff1f\u672c\u6587\u5c06\u4ee5\u5e96\u4e01\u89e3\u725b\u7684\u65b9\u5f0f\uff0c\u4e3a\u60a8\u63ed\u5f00<a href=\"https:\/\/www.yunshan.net\/\"   target=\"_blank\" style=\"color:blue\">eBPF<\/a>\u5728Linux\u5185\u6838\u4e2d\u7cbe\u5999\u8fd0\u4f5c\u7684\u795e\u79d8\u9762\u7eb1\u3002<\/p>\n<hr>\n<h3 id=\"\u4e00-ebpf\u7684\u6838\u5fc3\u67b6\u6784\u8bbe\u8ba1\">\u4e00\u3001eBPF\u7684\u6838\u5fc3\u67b6\u6784\u8bbe\u8ba1<\/h3>\n<p>eBPF\u672c\u8d28\u4e0a\u662f\u4e00\u4e2a\u8fd0\u884c\u5728\u5185\u6838\u6001\u7684<strong>\u6c99\u76d2\u865a\u62df\u673a<\/strong>\uff0c\u5176\u67b6\u6784\u8bbe\u8ba1\u4f53\u73b0\u4e86\u73b0\u4ee3\u64cd\u4f5c\u7cfb\u7edf\u7684<strong>\u5b89\u5168\u4f18\u5148<\/strong>\u7406\u5ff5\u3002\u4e0e\u4f20\u7edf\u7684\u5185\u6838\u6a21\u5757\u4e0d\u540c\uff0ceBPF\u7a0b\u5e8f\u901a\u8fc7<strong>\u9a8c\u8bc1\u5668<\/strong>\uff08Verifier\uff09\u7684\u4e25\u683c\u5ba1\u67e5\u540e\u624d\u80fd\u6267\u884c\u3002\u8fd9\u4e2a\u9a8c\u8bc1\u8fc7\u7a0b\u5305\u542b\u8d85\u8fc750\u79cd\u5b89\u5168\u68c0\u67e5\uff0c\u4f8b\u5982\uff1a<\/p>\n<ul>\n<li>\u5faa\u73af\u7ed3\u6784\u5fc5\u987b\u80fd\u88ab\u8bc1\u660e\u5728\u6709\u9650\u6b65\u9aa4\u5185\u7ed3\u675f\n<\/li>\n<li>\u6240\u6709\u5185\u5b58\u8bbf\u95ee\u5fc5\u987b\u7ecf\u8fc7\u8fb9\u754c\u68c0\u67e5\n<\/li>\n<li>\u7a0b\u5e8f\u957f\u5ea6\u9650\u5236\u5728\u767e\u4e07\u6761\u6307\u4ee4\u4ee5\u5185\uff08\u5177\u4f53\u6570\u503c\u968f\u5185\u6838\u7248\u672c\u8fed\u4ee3\u63d0\u5347\uff09\n<\/li>\n<\/ul>\n<p>\u8fd9\u79cd\u8bbe\u8ba1\u4f7f\u5f97eBPF\u5728\u63d0\u4f9b<strong>\u52a8\u6001\u6269\u5c55\u80fd\u529b<\/strong>\u7684\u540c\u65f6\uff0c\u5c06\u5185\u6838\u5d29\u6e83\u7684\u98ce\u9669\u964d\u4f4e\u4e86\u4e09\u4e2a\u6570\u91cf\u7ea7\u3002\u6b63\u5982Linux\u5185\u6838\u7ef4\u62a4\u8005Alexei Starovoitov\u6240\u8bf4\uff1a&rdquo;<em>eBPF\u9a8c\u8bc1\u5668\u662f\u4ee3\u7801\u5b89\u5168\u7684\u5b88\u95e8\u4eba\uff0c\u5b83\u7684\u4e25\u683c\u7a0b\u5ea6\u582a\u6bd4\u822a\u5929\u8f6f\u4ef6\u5ba1\u67e5<\/em>\u3002&rdquo;<\/p>\n<hr>\n<h3 id=\"\u4e8c-\u4ece\u5b57\u8282\u7801\u5230\u673a\u5668\u6307\u4ee4-jit\u7f16\u8bd1\u7684\u9b54\u6cd5\">\u4e8c\u3001\u4ece\u5b57\u8282\u7801\u5230\u673a\u5668\u6307\u4ee4\uff1aJIT\u7f16\u8bd1\u7684\u9b54\u6cd5<\/h3>\n<p>\u5f53eBPF\u7a0b\u5e8f\u901a\u8fc7\u9a8c\u8bc1\u540e\uff0c\u4f1a\u8fdb\u5165<strong>\u5373\u65f6\u7f16\u8bd1<\/strong>\uff08Just-In-Time Compilation\uff09\u9636\u6bb5\u3002\u8fd9\u4e2a\u8fc7\u7a0b\u5c06\u5e73\u53f0\u65e0\u5173\u7684eBPF\u5b57\u8282\u7801\u8f6c\u6362\u4e3a\u5bbf\u4e3b\u673a\u7684\u539f\u751f\u6307\u4ee4\u96c6\u3002\u4ee5x86_64\u67b6\u6784\u4e3a\u4f8b\uff1a<\/p>\n<pre><code class=\"language-c\">\/\/ \u539f\u59cbeBPF\u6307\u4ee4  \r\nBPF_MOV64_REG(BPF_REG_2, BPF_REG_10),  \r\nBPF_ALU64_IMM(BPF_ADD, BPF_REG_2, -8),  \r\n  \r\n\/\/ \u7f16\u8bd1\u540e\u7684x86_64\u673a\u5668\u7801  \r\n0x48 0x89 0xD5          \/\/ mov %rdx, %rbp  \r\n0x48 0x83 0xED 0x08     \/\/ sub $0x8, %rbp  \r\n<\/code><\/pre>\n<p>\u8fd9\u79cd\u8f6c\u6362\u4f7feBPF\u7a0b\u5e8f\u7684\u6267\u884c\u6548\u7387\u63a5\u8fd1\u539f\u751f\u5185\u6838\u4ee3\u7801\u3002\u5b9e\u6d4b\u6570\u636e\u663e\u793a\uff0c\u7ecf\u8fc7JIT\u4f18\u5316\u7684eBPF\u7a0b\u5e8f\u76f8\u6bd4\u89e3\u91ca\u6267\u884c\u6a21\u5f0f\uff0c\u6027\u80fd\u63d0\u5347\u53ef\u8fbe<strong>10\u500d<\/strong>\u4ee5\u4e0a\u3002\u4f46\u8fd9\u4e5f\u5e26\u6765\u4e86\u65b0\u7684\u6311\u6218\u2014\u2014\u4e0d\u540cCPU\u67b6\u6784\u9700\u8981\u7ef4\u62a4\u72ec\u7acb\u7684JIT\u7f16\u8bd1\u5668\uff0c\u8fd9\u6b63\u662f\u5f53\u524d<strong>ARM64<\/strong>\u548c<strong>RISC-V<\/strong>\u67b6\u6784\u652f\u6301\u4ecd\u5728\u6301\u7eed\u5b8c\u5584\u7684\u539f\u56e0\u3002<\/p>\n<hr>\n<h3 id=\"\u4e09-\u4e8b\u4ef6\u9a71\u52a8\u6267\u884c\u6a21\u578b\">\u4e09\u3001\u4e8b\u4ef6\u9a71\u52a8\u6267\u884c\u6a21\u578b<\/h3>\n<p>eBPF\u7a0b\u5e8f\u7684\u6267\u884c\u9075\u5faa<strong>\u4e8b\u4ef6\u9a71\u52a8<\/strong>\u8303\u5f0f\uff0c\u5176\u89e6\u53d1\u6761\u4ef6\u5305\u62ec\u4f46\u4e0d\u9650\u4e8e\uff1a<\/p>\n<ol>\n<li><strong>\u7f51\u7edc\u6570\u636e\u5305<\/strong>\u5230\u8fbe\u7279\u5b9a\u534f\u8bae\u6808\u5c42\u7ea7\n<\/li>\n<li><strong>\u7cfb\u7edf\u8c03\u7528<\/strong>\u8fdb\u5165\/\u9000\u51fa\u4e8b\u4ef6\n<\/li>\n<li><strong>\u5185\u6838\u51fd\u6570<\/strong>\u7684\u6267\u884c\u8ffd\u8e2a\u70b9\n<\/li>\n<li><strong>\u5b9a\u65f6\u5668<\/strong>\u5468\u671f\u6027\u89e6\u53d1\n<\/li>\n<\/ol>\n<p>\u4ee5\u7f51\u7edc\u5305\u5904\u7406\u4e3a\u4f8b\uff0c\u5f53\u6570\u636e\u5305\u7ecf\u8fc7<strong>XDP<\/strong>\uff08eXpress Data Path\uff09\u5c42\u65f6\uff0c\u6302\u8f7d\u7684eBPF\u7a0b\u5e8f\u4f1a\u4ee5\u7ebf\u901f\uff08wire-speed\uff09\u8fdb\u884c\u5904\u7406\u3002\u8fd9\u4e2a\u8fc7\u7a0b\u5b8c\u5168\u7ed5\u8fc7\u4f20\u7edf\u7f51\u7edc\u534f\u8bae\u6808\uff0c\u4f7f\u5f97\u67d0\u4e9b\u573a\u666f\u4e0b\u7684\u5ef6\u8fdf\u4ece\u6beb\u79d2\u7ea7\u9aa4\u964d\u5230<strong>\u5fae\u79d2\u7ea7<\/strong>\u3002\u4e91\u670d\u52a1\u63d0\u4f9b\u5546Cloudflare\u7684\u5b9e\u8df5\u8868\u660e\uff0c\u4f7f\u7528XDP+eBPF\u7ec4\u5408\u6210\u529f\u62b5\u5fa1\u4e86\u6bcf\u79d2<strong>300\u4e07\u6b21<\/strong>\u7684DDoS\u653b\u51fb\u3002<\/p>\n<hr>\n<h3 id=\"\u56db-\u5b89\u5168\u673a\u5236\u7684\u7acb\u4f53\u9632\u5fa1\">\u56db\u3001\u5b89\u5168\u673a\u5236\u7684\u7acb\u4f53\u9632\u5fa1<\/h3>\n<p>eBPF\u7684\u5b89\u5168\u4f53\u7cfb\u6784\u5efa\u5728<strong>\u7eb5\u6df1\u9632\u5fa1<\/strong>\u7406\u5ff5\u4e4b\u4e0a\uff1a<\/p>\n<ul>\n<li><strong>\u9759\u6001\u9a8c\u8bc1<\/strong>\uff1a\u9a8c\u8bc1\u5668\u5bf9\u63a7\u5236\u6d41\u3001\u5185\u5b58\u8bbf\u95ee\u7b49\u8fdb\u884c\u7b26\u53f7\u6267\u884c\n<\/li>\n<li><strong>\u8fd0\u884c\u65f6\u4fdd\u62a4<\/strong>\uff1a\u6240\u6709\u8f85\u52a9\u51fd\u6570\u5fc5\u987b\u901a\u8fc7\u767d\u540d\u5355\u6821\u9a8c\n<\/li>\n<li><strong>\u6743\u9650\u63a7\u5236<\/strong>\uff1aCAP_BPF\u7b49\u80fd\u529b\u673a\u5236\u9650\u5236\u7279\u6743\u64cd\u4f5c\n<\/li>\n<li><strong>\u5185\u5b58\u9694\u79bb<\/strong>\uff1a\u4f7f\u7528\u72ec\u7acb\u7684\u5806\u6808\u548c\u4e0a\u4e0b\u6587\u73af\u5883\n<\/li>\n<\/ul>\n<p>\u8fd9\u79cd\u591a\u5c42\u6b21\u7684\u9632\u62a4\u4f7f\u5f97\u5373\u4f7f\u5b58\u5728\u6f0f\u6d1e\u7684eBPF\u7a0b\u5e8f\uff0c\u5176\u7834\u574f\u8303\u56f4\u4e5f\u88ab\u4e25\u683c\u9650\u5236\u30022022\u5e74CVE-2022-23222\u6f0f\u6d1e\u7684\u4fee\u590d\u8fc7\u7a0b\u9a8c\u8bc1\u4e86\u8be5\u673a\u5236\u7684\u6709\u6548\u6027\u2014\u2014\u5c3d\u7ba1\u53d1\u73b0\u9a8c\u8bc1\u5668\u5b58\u5728\u903b\u8f91\u7f3a\u9677\uff0c\u4f46\u5b9e\u9645\u5229\u7528\u8be5\u6f0f\u6d1e\u9700\u8981\u5df2\u5177\u5907<strong>root\u6743\u9650<\/strong>\u3002<\/p>\n<hr>\n<h3 id=\"\u4e94-\u6570\u636e\u5e73\u9762\u7684\u9ec4\u91d1\u642d\u6863\">\u4e94\u3001\u6570\u636e\u5e73\u9762\u7684\u9ec4\u91d1\u642d\u6863<\/h3>\n<p>eBPF\u4e0e\u5185\u6838\u7684\u4ea4\u4e92\u901a\u8fc7<strong>\u6620\u5c04<\/strong>\uff08Map\uff09\u673a\u5236\u5b9e\u73b0\uff0c\u8fd9\u4e9b\u7279\u6b8a\u6570\u636e\u7ed3\u6784\u652f\u6301\uff1a<\/p>\n<ul>\n<li><strong>\u952e\u503c\u5b58\u50a8<\/strong>\uff08Hash\/Array Map\uff09\n<\/li>\n<li><strong>\u73af\u5f62\u7f13\u51b2\u533a<\/strong>\uff08Ring Buffer\uff09\n<\/li>\n<li><strong>LRU\u7f13\u5b58<\/strong>\n<\/li>\n<li><strong>\u6027\u80fd\u8ba1\u6570\u5668<\/strong>\n<\/li>\n<\/ul>\n<p>\u4ee5BCC\u5de5\u5177\u96c6\u4e3a\u4f8b\uff0c\u7528\u6237\u6001\u7a0b\u5e8f\u901a\u8fc7<code>bpf_map_lookup_elem<\/code>\u63a5\u53e3\u8bfb\u53d6\u5185\u6838\u6570\u636e\u3002\u8fd9\u79cd\u8bbe\u8ba1\u5e26\u6765\u4e86\u60ca\u4eba\u7684\u7075\u6d3b\u6027\uff1aFacebook\u7684<strong>Katran<\/strong>\u8d1f\u8f7d\u5747\u8861\u5668\u6b63\u662f\u5229\u7528\u81ea\u5b9a\u4e49Map\u7ed3\u6784\uff0c\u5728\u5355\u8282\u70b9\u5b9e\u73b0\u4e86\u6bcf\u79d2<strong>1000\u4e07\u6b21<\/strong>\u7684\u8bf7\u6c42\u5206\u53d1\u3002<\/p>\n<hr>\n<h3 id=\"\u516d-\u6027\u80fd\u4e0e\u5b89\u5168\u7684\u5e73\u8861\u827a\u672f\">\u516d\u3001\u6027\u80fd\u4e0e\u5b89\u5168\u7684\u5e73\u8861\u827a\u672f<\/h3>\n<p>\u867d\u7136eBPF\u5c55\u73b0\u51fa\u9769\u547d\u6027\u7684\u4f18\u52bf\uff0c\u4f46\u5f00\u53d1\u8005\u4ecd\u9700\u6ce8\u610f\u5176<strong>\u4f7f\u7528\u8fb9\u754c<\/strong>\uff1a<\/p>\n<ul>\n<li><strong>\u6307\u4ee4\u6570\u9650\u5236<\/strong>\u5bfc\u81f4\u590d\u6742\u903b\u8f91\u9700\u8981\u62c6\u5206\n<\/li>\n<li><strong>\u6808\u7a7a\u95f4<\/strong>\u4ec5512\u5b57\u8282\uff085.x\u5185\u6838\u540e\u6269\u5c55\u81f3256KB\uff09\n<\/li>\n<li><strong>\u517c\u5bb9\u6027<\/strong>\u95ee\u9898\u5b58\u5728\u4e8e\u65e7\u7248\u672c\u5185\u6838\n<\/li>\n<\/ul>\n<p>\u793e\u533a\u901a\u8fc7<strong>BPF Type Format<\/strong>\uff08BTF\uff09\u548c<strong>CO-RE<\/strong>\uff08Compile Once &#8211; Run Everywhere\uff09\u6280\u672f\u9010\u6b65\u89e3\u51b3\u8fd9\u4e9b\u95ee\u9898\u3002\u4f8b\u5982\uff0c\u57285.16\u5185\u6838\u4e2d\u5f15\u5165\u7684<strong>\u52a8\u6001\u6307\u9488<\/strong>\u652f\u6301\uff0c\u4f7f\u5f97\u6570\u636e\u7ed3\u6784\u517c\u5bb9\u6027\u68c0\u67e5\u6548\u7387\u63d0\u5347\u4e86<strong>40%<\/strong>\u3002<\/p>\n<hr>\n<h3 id=\"\u4e03-\u672a\u6765\u6f14\u8fdb\u65b9\u5411\">\u4e03\u3001\u672a\u6765\u6f14\u8fdb\u65b9\u5411<\/h3>\n<p>\u968f\u7740Linux 6.0\u5185\u6838\u5f15\u5165<strong>BPF Token<\/strong>\u673a\u5236\uff0ceBPF\u6b63\u5728\u5411<strong>\u6743\u9650\u7ec6\u5206<\/strong>\u65b9\u5411\u53d1\u5c55\u3002\u5fae\u8f6f\u7684\u7814\u7a76\u8868\u660e\uff0c\u5728Windows Subsystem for Linux\uff08WSL2\uff09\u4e2d\u96c6\u6210eBPF\u540e\uff0c\u8de8\u7cfb\u7edf\u8c03\u7528\u7684\u8ffd\u8e2a\u6548\u7387\u63d0\u5347\u4e86**<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u5728\u5f53\u4eca\u4e91\u8ba1\u7b97\u548c\u5fae\u670d\u52a1\u67b6\u6784\u76db\u884c\u7684\u65f6\u4ee3\uff0cLinux\u5185\u6838\u7684\u6bcf\u4e00\u6b21\u6280\u672f\u9769\u65b0\u90fd\u7275\u52a8\u7740\u5168\u7403\u5f00\u53d1\u8005\u7684\u795e\u7ecf\u3002\u5f53\u4f20\u7edf\u7684\u5185\u6838\u6a21\u5757\u5f00\u53d1\u56e0\u5b89\u5168\u98ce\u9669\u548c\u5f00\u53d1\u95e8\u69db\u9971\u53d7\u8bdf\u75c5\u65f6\uff0c\u4e00\u79cd\u540d\u4e3aeBPF\uff08Extended Berkeley Packet Filter\uff09\u7684\u6280\u672f\u6084\u7136\u5d1b\u8d77\u3002\u5b83\u50cf\u4e00\u628a\u94a5\u5319\uff0c\u6253\u5f00\u4e86\u5728\u4e0d\u4fee\u6539\u5185\u6838\u6e90\u7801\u7684\u524d\u63d0\u4e0b\u52a8\u6001\u6ce8\u5165\u4ee3\u7801\u7684\u6f58\u591a\u62c9\u9b54\u76d2\u3002\u4f46\u8fd9\u573a\u9769\u547d\u80cc\u540e\u7684\u6267\u884c\u673a\u5236\u7a76\u7adf\u5982\u4f55\u8fd0\u8f6c\uff1f\u672c\u6587\u5c06\u4ee5\u5e96\u4e01\u89e3\u725b\u7684\u65b9\u5f0f\uff0c\u4e3a\u60a8\u63ed\u5f00eBPF\u5728Linux\u5185\u6838\u4e2d\u7cbe\u5999\u8fd0\u4f5c\u7684\u795e\u79d8\u9762\u7eb1\u3002 \u4e00\u3001eBPF\u7684\u6838\u5fc3\u67b6\u6784\u8bbe\u8ba1 eBPF\u672c\u8d28\u4e0a\u662f\u4e00\u4e2a\u8fd0\u884c\u5728\u5185\u6838\u6001\u7684\u6c99\u76d2\u865a\u62df\u673a\uff0c\u5176\u67b6\u6784\u8bbe\u8ba1\u4f53\u73b0\u4e86\u73b0\u4ee3\u64cd\u4f5c\u7cfb\u7edf\u7684\u5b89\u5168\u4f18\u5148\u7406\u5ff5\u3002\u4e0e\u4f20\u7edf\u7684\u5185\u6838\u6a21\u5757\u4e0d\u540c\uff0ceBPF\u7a0b\u5e8f\u901a\u8fc7\u9a8c\u8bc1\u5668\uff08Verifier\uff09\u7684\u4e25\u683c\u5ba1\u67e5\u540e\u624d\u80fd\u6267\u884c\u3002\u8fd9\u4e2a\u9a8c\u8bc1\u8fc7\u7a0b\u5305\u542b\u8d85\u8fc750\u79cd\u5b89\u5168\u68c0\u67e5\uff0c\u4f8b\u5982\uff1a \u5faa\u73af\u7ed3\u6784\u5fc5\u987b\u80fd\u88ab\u8bc1\u660e\u5728\u6709\u9650\u6b65\u9aa4\u5185\u7ed3\u675f \u6240\u6709\u5185\u5b58\u8bbf\u95ee\u5fc5\u987b\u7ecf\u8fc7\u8fb9\u754c\u68c0\u67e5 \u7a0b\u5e8f\u957f\u5ea6\u9650\u5236\u5728\u767e\u4e07\u6761\u6307\u4ee4\u4ee5\u5185\uff08\u5177\u4f53\u6570\u503c\u968f\u5185\u6838\u7248\u672c\u8fed\u4ee3\u63d0\u5347\uff09 \u8fd9\u79cd\u8bbe\u8ba1\u4f7f\u5f97eBPF\u5728\u63d0\u4f9b\u52a8\u6001\u6269\u5c55\u80fd\u529b\u7684\u540c\u65f6\uff0c\u5c06\u5185\u6838\u5d29\u6e83\u7684\u98ce\u9669\u964d\u4f4e\u4e86\u4e09\u4e2a\u6570\u91cf\u7ea7\u3002\u6b63\u5982Linux\u5185\u6838\u7ef4\u62a4\u8005Alexei Starovoitov\u6240\u8bf4\uff1a&rdquo;eBPF\u9a8c\u8bc1\u5668\u662f\u4ee3\u7801\u5b89\u5168\u7684\u5b88\u95e8\u4eba\uff0c\u5b83\u7684\u4e25\u683c\u7a0b\u5ea6\u582a\u6bd4\u822a\u5929\u8f6f\u4ef6\u5ba1\u67e5\u3002&rdquo; \u4e8c\u3001\u4ece\u5b57\u8282\u7801\u5230\u673a\u5668\u6307\u4ee4\uff1aJIT\u7f16\u8bd1\u7684\u9b54\u6cd5 \u5f53eBPF\u7a0b\u5e8f\u901a\u8fc7\u9a8c\u8bc1\u540e\uff0c\u4f1a\u8fdb\u5165\u5373\u65f6\u7f16\u8bd1\uff08Just-In-Time Compilation\uff09\u9636\u6bb5\u3002\u8fd9\u4e2a\u8fc7\u7a0b\u5c06\u5e73\u53f0\u65e0\u5173\u7684eBPF\u5b57\u8282\u7801\u8f6c\u6362\u4e3a\u5bbf\u4e3b\u673a\u7684\u539f\u751f\u6307\u4ee4\u96c6\u3002\u4ee5x86_64\u67b6\u6784\u4e3a\u4f8b\uff1a \/\/ \u539f\u59cbeBPF\u6307\u4ee4 BPF_MOV64_REG(BPF_REG_2, BPF_REG_10), BPF_ALU64_IMM(BPF_ADD, BPF_REG_2, -8), \/\/ \u7f16\u8bd1\u540e\u7684x86_64\u673a\u5668\u7801 0x48 0x89 0xD5 \/\/ mov %rdx, %rbp 0x48 0x83 0xED 0x08 \/\/ sub $0x8, %rbp \u8fd9\u79cd\u8f6c\u6362\u4f7feBPF\u7a0b\u5e8f\u7684\u6267\u884c\u6548\u7387\u63a5\u8fd1\u539f\u751f\u5185\u6838\u4ee3\u7801\u3002\u5b9e\u6d4b\u6570\u636e\u663e\u793a\uff0c\u7ecf\u8fc7JIT\u4f18\u5316\u7684eBPF\u7a0b\u5e8f\u76f8\u6bd4\u89e3\u91ca\u6267\u884c\u6a21\u5f0f\uff0c\u6027\u80fd\u63d0\u5347\u53ef\u8fbe10\u500d\u4ee5\u4e0a\u3002\u4f46\u8fd9\u4e5f\u5e26\u6765\u4e86\u65b0\u7684\u6311\u6218\u2014\u2014\u4e0d\u540cCPU\u67b6\u6784\u9700\u8981\u7ef4\u62a4\u72ec\u7acb\u7684JIT\u7f16\u8bd1\u5668\uff0c\u8fd9\u6b63\u662f\u5f53\u524dARM64\u548cRISC-V\u67b6\u6784\u652f\u6301\u4ecd\u5728\u6301\u7eed\u5b8c\u5584\u7684\u539f\u56e0\u3002 \u4e09\u3001\u4e8b\u4ef6\u9a71\u52a8\u6267\u884c\u6a21\u578b eBPF\u7a0b\u5e8f\u7684\u6267\u884c\u9075\u5faa\u4e8b\u4ef6\u9a71\u52a8\u8303\u5f0f\uff0c\u5176\u89e6\u53d1\u6761\u4ef6\u5305\u62ec\u4f46\u4e0d\u9650\u4e8e\uff1a \u7f51\u7edc\u6570\u636e\u5305\u5230\u8fbe\u7279\u5b9a\u534f\u8bae\u6808\u5c42\u7ea7 \u7cfb\u7edf\u8c03\u7528\u8fdb\u5165\/\u9000\u51fa\u4e8b\u4ef6 \u5185\u6838\u51fd\u6570\u7684\u6267\u884c\u8ffd\u8e2a\u70b9 \u5b9a\u65f6\u5668\u5468\u671f\u6027\u89e6\u53d1 \u4ee5\u7f51\u7edc\u5305\u5904\u7406\u4e3a\u4f8b\uff0c\u5f53\u6570\u636e\u5305\u7ecf\u8fc7XDP\uff08eXpress Data Path\uff09\u5c42\u65f6\uff0c\u6302\u8f7d\u7684eBPF\u7a0b\u5e8f\u4f1a\u4ee5\u7ebf\u901f\uff08wire-speed\uff09\u8fdb\u884c\u5904\u7406\u3002\u8fd9\u4e2a\u8fc7\u7a0b\u5b8c\u5168\u7ed5\u8fc7\u4f20\u7edf\u7f51\u7edc\u534f\u8bae\u6808\uff0c\u4f7f\u5f97\u67d0\u4e9b\u573a\u666f\u4e0b\u7684\u5ef6\u8fdf\u4ece\u6beb\u79d2\u7ea7\u9aa4\u964d\u5230\u5fae\u79d2\u7ea7\u3002\u4e91\u670d\u52a1\u63d0\u4f9b\u5546Cloudflare\u7684\u5b9e\u8df5\u8868\u660e\uff0c\u4f7f\u7528XDP+eBPF\u7ec4\u5408\u6210\u529f\u62b5\u5fa1\u4e86\u6bcf\u79d2300\u4e07\u6b21\u7684DDoS\u653b\u51fb\u3002 \u56db\u3001\u5b89\u5168\u673a\u5236\u7684\u7acb\u4f53\u9632\u5fa1 eBPF\u7684\u5b89\u5168\u4f53\u7cfb\u6784\u5efa\u5728\u7eb5\u6df1\u9632\u5fa1\u7406\u5ff5\u4e4b\u4e0a\uff1a \u9759\u6001\u9a8c\u8bc1\uff1a\u9a8c\u8bc1\u5668\u5bf9\u63a7\u5236\u6d41\u3001\u5185\u5b58\u8bbf\u95ee\u7b49\u8fdb\u884c\u7b26\u53f7\u6267\u884c 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[&hellip;]<\/p>\n","protected":false},"author":4,"featured_media":36555,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[14],"tags":[],"class_list":["post-36554","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-product-news"],"_links":{"self":[{"href":"https:\/\/www.yunshan.net\/blog\/wp-json\/wp\/v2\/posts\/36554","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.yunshan.net\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.yunshan.net\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.yunshan.net\/blog\/wp-json\/wp\/v2\/users\/4"}],"replies":[{"embeddable":true,"href":"https:\/\/www.yunshan.net\/blog\/wp-json\/wp\/v2\/comments?post=36554"}],"version-history":[{"count":1,"href":"https:\/\/www.yunshan.net\/blog\/wp-json\/wp\/v2\/posts\/36554\/revisions"}],"predecessor-version":[{"id":36556,"href":"https:\/\/www.yunshan.net\/blog\/wp-json\/wp\/v2\/posts\/36554\/revisions\/36556"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.yunshan.net\/blog\/wp-json\/wp\/v2\/media\/36555"}],"wp:attachment":[{"href":"https:\/\/www.yunshan.net\/blog\/wp-json\/wp\/v2\/media?parent=36554"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.yunshan.net\/blog\/wp-json\/wp\/v2\/categories?post=36554"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.yunshan.net\/blog\/wp-json\/wp\/v2\/tags?post=36554"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}