{"id":37826,"date":"2025-04-22T21:48:55","date_gmt":"2025-04-22T13:48:55","guid":{"rendered":"https:\/\/www.yunshan.net\/blog\/?p=37826"},"modified":"2025-04-22T21:48:55","modified_gmt":"2025-04-22T13:48:55","slug":"ebpf%e5%9c%a8%e7%b3%bb%e7%bb%9f%e5%8f%af%e9%9d%a0%e6%80%a7%e5%92%8c%e7%a8%b3%e5%ae%9a%e6%80%a7%e4%b8%ad%e8%b5%b7%e5%88%b0%e4%ba%86%e4%bb%80%e4%b9%88%e4%bd%9c%e7%94%a8","status":"publish","type":"post","link":"https:\/\/www.yunshan.net\/blog\/archives\/37826.html","title":{"rendered":"eBPF\u5728\u7cfb\u7edf\u53ef\u9760\u6027\u548c\u7a33\u5b9a\u6027\u4e2d\u8d77\u5230\u4e86\u4ec0\u4e48\u4f5c\u7528"},"content":{"rendered":"

\n

\"eBPF\u5728\u7cfb\u7edf\u53ef\u9760\u6027\u548c\u7a33\u5b9a\u6027\u4e2d\u8d77\u5230\u4e86\u4ec0\u4e48\u4f5c\u7528\"<\/p>\n<\/p>\n

eBPF\uff08Extended Berkeley Packet Filter\uff09\u4f5c\u4e3a\u4e00\u9879\u9769\u547d\u6027\u7684\u6280\u672f\uff0c\u5728\u7cfb\u7edf\u53ef\u9760\u6027\u548c\u7a33\u5b9a\u6027\u65b9\u9762\u53d1\u6325\u7740\u91cd\u8981\u4f5c\u7528\u3002\u672c\u6587\u5c06\u6df1\u5165\u63a2\u8ba8eBPF\u5982\u4f55\u901a\u8fc7\u589e\u5f3a\u7cfb\u7edf\u7684\u5b89\u5168\u6027\u3001\u63d0\u4f9b\u52a8\u6001\u7f16\u7a0b\u80fd\u529b\u4ee5\u53ca\u4f18\u5316\u6027\u80fd\uff0c\u4e3a\u73b0\u4ee3\u7cfb\u7edf\u7684\u53ef\u9760\u6027\u548c\u7a33\u5b9a\u6027\u63d0\u4f9b\u652f\u6301\u3002<\/p>\n

\u4e00\u3001eBPF\u5728\u7cfb\u7edf\u53ef\u9760\u6027\u4e2d\u7684\u4f5c\u7528<\/h2>\n

1. \u589e\u5f3a\u5b89\u5168\u6027<\/strong><\/p>\n

  • \u9632\u6b62\u6076\u610f\u7a0b\u5e8f\u6267\u884c<\/strong>\uff1aeBPF\u7a0b\u5e8f\u5728\u53d7\u9650\u7684\u865a\u62df\u673a\u4e2d\u8fd0\u884c\uff0c\u5185\u6838\u4f1a\u5bf9\u5176\u4ee3\u7801\u8fdb\u884c\u5206\u6790\uff0c\u786e\u4fdd\u4e0d\u4f1a\u8fdb\u884c\u7cfb\u7edf\u8c03\u7528\u3001\u5185\u5b58\u8bbf\u95ee\u7b49\u6076\u610f\u64cd\u4f5c\uff0c\u4ece\u800c\u9632\u6b62\u6076\u610f\u7a0b\u5e8f\u5bf9\u7cfb\u7edf\u7684\u7834\u574f\uff0c\u4fdd\u969c\u7cfb\u7edf\u53ef\u9760\u6027\u3002<\/li>\n
  • \u534f\u8bae\u6808\u9632\u62a4<\/strong>\uff1a\u4f8b\u5982\u5728\u57fa\u4e8eeBPF\u7684\u5b89\u5168\u53ef\u4fe1\u534f\u8bae\u6808\u4e2d\uff0c\u901a\u8fc7\u5728NF_INET_LOCAL_IN\u94a9\u5b50\u5904\u6302\u8f7deBPF\u7a0b\u5e8f\uff0c\u53ef\u4ee5\u5bf9\u5165\u7ad9\u6570\u636e\u5305\u8fdb\u884c\u989d\u5916\u7684\u8fc7\u6ee4\u548c\u9632\u5fa1\uff0c\u9632\u6b62\u653b\u51fb\u8005\u5229\u7528\u65e0\u72b6\u6001\u534f\u8bae\u7684\u8bed\u4e49\u7f3a\u5931\u95ee\u9898\u8fdb\u884c\u653b\u51fb\uff0c\u589e\u5f3a\u7cfb\u7edf\u7684\u5b89\u5168\u6027\u548c\u53ef\u9760\u6027\u3002<\/li>\n

    2. \u63d0\u4f9b\u52a8\u6001\u7f16\u7a0b\u80fd\u529b<\/strong><\/p>\n

  • \u52a8\u6001\u52a0\u8f7d\u548c\u66f4\u65b0<\/strong>\uff1aeBPF\u5141\u8bb8\u7528\u6237\u5728\u4e0d\u66f4\u6539\u5185\u6838\u6e90\u4ee3\u7801\u6216\u91cd\u65b0\u7f16\u8bd1\u7684\u60c5\u51b5\u4e0b\uff0c\u52a8\u6001\u52a0\u8f7d\u3001\u5378\u8f7d\u548c\u66f4\u65b0eBPF\u7a0b\u5e8f\u3002\u8fd9\u610f\u5473\u7740\u5728\u7cfb\u7edf\u8fd0\u884c\u65f6\uff0c\u53ef\u4ee5\u6839\u636e\u9700\u8981\u7075\u6d3b\u5730\u8c03\u6574\u5185\u6838\u529f\u80fd\uff0c\u800c\u65e0\u9700\u91cd\u542f\u7cfb\u7edf\uff0c\u63d0\u9ad8\u4e86\u7cfb\u7edf\u7684\u53ef\u9760\u6027\u548c\u53ef\u7528\u6027\u3002<\/li>\n
  • \u529f\u80fd\u6269\u5c55<\/strong>\uff1a\u7528\u6237\u53ef\u4ee5\u7f16\u5199\u81ea\u5b9a\u4e49\u7684eBPF\u7a0b\u5e8f\uff0c\u901a\u8fc7Hook\u673a\u5236\u4e0e\u5185\u6838\u4ea4\u4e92\uff0c\u5b9e\u73b0\u5bf9\u5185\u6838\u529f\u80fd\u7684\u6269\u5c55\u3002\u4f8b\u5982\uff0c\u5728\u4e0d\u4fee\u6539\u5185\u6838\u7684\u60c5\u51b5\u4e0b\uff0c\u5b9e\u73b0\u7f51\u7edc\u6570\u636e\u5305\u7684\u76d1\u63a7\u3001\u6027\u80fd\u7edf\u8ba1\u548c\u5b89\u5168\u5ba1\u8ba1\u7b49\u529f\u80fd\uff0c\u4e3a\u7cfb\u7edf\u7684\u53ef\u9760\u8fd0\u884c\u63d0\u4f9b\u4fdd\u969c\u3002<\/li>\n

    \u4e8c\u3001eBPF\u5728\u7cfb\u7edf\u7a33\u5b9a\u6027\u4e2d\u7684\u4f5c\u7528<\/h2>\n

    1. \u9a8c\u8bc1\u5668\u786e\u4fdd\u7a0b\u5e8f\u6b63\u786e\u6027<\/strong><\/p>\n

  • \u63a7\u5236\u6d41\u9a8c\u8bc1<\/strong>\uff1aeBPF\u9a8c\u8bc1\u5668\u4f7f\u7528\u6df1\u5ea6\u4f18\u5148\u641c\u7d22\uff08DFS\uff09\u7b97\u6cd5\u904d\u5386\u7a0b\u5e8f\u7684\u63a7\u5236\u6d41\u56fe\uff0c\u786e\u4fdd\u5b83\u662f\u4e00\u4e2a\u6709\u5411\u65e0\u73af\u56fe\uff08DAG\uff09\uff0c\u9632\u6b62\u7a0b\u5e8f\u8fdb\u5165\u65e0\u9650\u5faa\u73af\uff0c\u4ece\u800c\u786e\u4fdd\u7a0b\u5e8f\u7684\u7ec8\u6b62\u6027\uff0c\u7ef4\u62a4\u7cfb\u7edf\u7684\u7a33\u5b9a\u6027\u3002<\/li>\n
  • \u5185\u5b58\u548c\u7c7b\u578b\u5b89\u5168\u68c0\u67e5<\/strong>\uff1a\u9a8c\u8bc1\u5668\u68c0\u67e5\u53ef\u80fd\u7684\u8d8a\u754c\u5185\u5b58\u8bbf\u95ee\u3001\u4f7f\u7528\u540e\u91ca\u653e\u7684\u9519\u8bef\u548c\u5bf9\u8c61\u6cc4\u6f0f\u7b49\uff0c\u9632\u8303\u5e38\u89c1\u7684\u53ef\u88ab\u5229\u7528\u7684\u6f0f\u6d1e\u3002\u5229\u7528BPF\u7c7b\u578b\u683c\u5f0f\uff08BTF\uff09\u786e\u4fdd\u7c7b\u578b\u5b89\u5168\uff0c\u9632\u6b62\u7c7b\u578b\u6df7\u6dc6\u9519\u8bef\uff0c\u7ef4\u62a4\u5185\u6838\u6570\u636e\u7684\u5b8c\u6574\u6027\u3002<\/li>\n
  • \u786c\u4ef6\u5f02\u5e38\u5904\u7406<\/strong>\uff1a\u9a8c\u8bc1\u5668\u5305\u62ec\u68c0\u67e5\u672a\u77e5\u6807\u91cf\u7684\u9664\u6cd5\u7b49\u786c\u4ef6\u5f02\u5e38\uff0c\u786e\u4fdd\u6307\u4ee4\u6309\u7167\u5b89\u5168\u7684\u65b9\u5f0f\u5904\u7406\uff0c\u9632\u6b62\u7a0b\u5e8f\u7a81\u7136\u7ec8\u6b62\u548c\u5185\u6838\u6050\u614c\u3002<\/li>\n

    2. \u4f18\u5316\u6027\u80fd<\/strong><\/p>\n

  • \u9ad8\u6548\u6267\u884c<\/strong>\uff1aeBPF\u7a0b\u5e8f\u7ecf\u8fc7\u4f18\u5316\uff0c\u80fd\u591f\u5728\u5185\u6838\u4e2d\u9ad8\u6548\u6267\u884c\u3002\u4f8b\u5982\uff0cXRP\u6846\u67b6\u5141\u8bb8\u5e94\u7528\u7a0b\u5e8f\u4eceeBPF\u5728NVMe\u9a71\u52a8\u7a0b\u5e8f\u4e2d\u7684\u94a9\u5b50\u6267\u884c\u7528\u6237\u5b9a\u4e49\u7684\u5b58\u50a8\u529f\u80fd\uff0c\u663e\u8457\u63d0\u9ad8\u952e\u503c\u5b58\u50a8\u7684\u541e\u5410\u91cf\u548c\u5ef6\u8fdf\uff0c\u63d0\u5347\u7cfb\u7edf\u7684\u6574\u4f53\u6027\u80fd\u548c\u7a33\u5b9a\u6027\u3002<\/li>\n
  • \u51cf\u5c11\u5185\u6838\u5f00\u9500<\/strong>\uff1a\u901a\u8fc7\u5728\u7279\u6743\u7ea7\u4e0a\u4e0b\u6587\uff08\u5982\u64cd\u4f5c\u7cfb\u7edf\u5185\u6838\uff09\u4e2d\u8fd0\u884c\u7528\u6237\u81ea\u5b9a\u4e49\u7a0b\u5e8f\uff0c\u51cf\u5c11\u4e86\u4f20\u7edf\u7528\u6237\u7a7a\u95f4\u5b9e\u73b0\u7684\u5f00\u9500\uff0c\u63d0\u9ad8\u4e86\u7cfb\u7edf\u7684\u8fd0\u884c\u6548\u7387\u548c\u7a33\u5b9a\u6027\u3002<\/li>\n

    eBPF\u5728\u7cfb\u7edf\u53ef\u9760\u6027\u548c\u7a33\u5b9a\u6027\u65b9\u9762\u7684\u4f5c\u7528\u4e0d\u53ef\u5ffd\u89c6\u3002\u5b83\u901a\u8fc7\u589e\u5f3a\u5b89\u5168\u6027\u3001\u63d0\u4f9b\u52a8\u6001\u7f16\u7a0b\u80fd\u529b\u3001\u786e\u4fdd\u7a0b\u5e8f\u6b63\u786e\u6027\u4ee5\u53ca\u4f18\u5316\u6027\u80fd\uff0c\u4e3a\u73b0\u4ee3\u7cfb\u7edf\u7684\u7a33\u5b9a\u8fd0\u884c\u63d0\u4f9b\u4e86\u5f3a\u6709\u529b\u7684\u652f\u6301\u3002\u968f\u7740\u6280\u672f\u7684\u4e0d\u65ad\u53d1\u5c55\uff0ceBPF\u6709\u671b\u5728\u672a\u6765\u7684\u7cfb\u7edf\u8bbe\u8ba1\u4e2d\u53d1\u6325\u66f4\u52a0\u91cd\u8981\u7684\u4f5c\u7528\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"

    eBPF\uff08Extended Berkeley Packet Filter\uff09\u4f5c\u4e3a\u4e00\u9879\u9769\u547d\u6027\u7684\u6280\u672f\uff0c\u5728\u7cfb\u7edf\u53ef\u9760\u6027\u548c\u7a33\u5b9a\u6027\u65b9\u9762\u53d1\u6325\u7740\u91cd\u8981\u4f5c\u7528\u3002\u672c\u6587\u5c06\u6df1\u5165\u63a2\u8ba8eBPF\u5982\u4f55\u901a\u8fc7\u589e\u5f3a\u7cfb\u7edf\u7684\u5b89\u5168\u6027\u3001\u63d0\u4f9b\u52a8\u6001\u7f16\u7a0b\u80fd\u529b\u4ee5\u53ca\u4f18\u5316\u6027\u80fd\uff0c\u4e3a\u73b0\u4ee3\u7cfb\u7edf\u7684\u53ef\u9760\u6027\u548c\u7a33\u5b9a\u6027\u63d0\u4f9b\u652f\u6301\u3002 \u4e00\u3001eBPF\u5728\u7cfb\u7edf\u53ef\u9760\u6027\u4e2d\u7684\u4f5c\u7528 1. \u589e\u5f3a\u5b89\u5168\u6027 \u9632\u6b62\u6076\u610f\u7a0b\u5e8f\u6267\u884c\uff1aeBPF\u7a0b\u5e8f\u5728\u53d7\u9650\u7684\u865a\u62df\u673a\u4e2d\u8fd0\u884c\uff0c\u5185\u6838\u4f1a\u5bf9\u5176\u4ee3\u7801\u8fdb\u884c\u5206\u6790\uff0c\u786e\u4fdd\u4e0d\u4f1a\u8fdb\u884c\u7cfb\u7edf\u8c03\u7528\u3001\u5185\u5b58\u8bbf\u95ee\u7b49\u6076\u610f\u64cd\u4f5c\uff0c\u4ece\u800c\u9632\u6b62\u6076\u610f\u7a0b\u5e8f\u5bf9\u7cfb\u7edf\u7684\u7834\u574f\uff0c\u4fdd\u969c\u7cfb\u7edf\u53ef\u9760\u6027\u3002 \u534f\u8bae\u6808\u9632\u62a4\uff1a\u4f8b\u5982\u5728\u57fa\u4e8eeBPF\u7684\u5b89\u5168\u53ef\u4fe1\u534f\u8bae\u6808\u4e2d\uff0c\u901a\u8fc7\u5728NF_INET_LOCAL_IN\u94a9\u5b50\u5904\u6302\u8f7deBPF\u7a0b\u5e8f\uff0c\u53ef\u4ee5\u5bf9\u5165\u7ad9\u6570\u636e\u5305\u8fdb\u884c\u989d\u5916\u7684\u8fc7\u6ee4\u548c\u9632\u5fa1\uff0c\u9632\u6b62\u653b\u51fb\u8005\u5229\u7528\u65e0\u72b6\u6001\u534f\u8bae\u7684\u8bed\u4e49\u7f3a\u5931\u95ee\u9898\u8fdb\u884c\u653b\u51fb\uff0c\u589e\u5f3a\u7cfb\u7edf\u7684\u5b89\u5168\u6027\u548c\u53ef\u9760\u6027\u3002 2. \u63d0\u4f9b\u52a8\u6001\u7f16\u7a0b\u80fd\u529b \u52a8\u6001\u52a0\u8f7d\u548c\u66f4\u65b0\uff1aeBPF\u5141\u8bb8\u7528\u6237\u5728\u4e0d\u66f4\u6539\u5185\u6838\u6e90\u4ee3\u7801\u6216\u91cd\u65b0\u7f16\u8bd1\u7684\u60c5\u51b5\u4e0b\uff0c\u52a8\u6001\u52a0\u8f7d\u3001\u5378\u8f7d\u548c\u66f4\u65b0eBPF\u7a0b\u5e8f\u3002\u8fd9\u610f\u5473\u7740\u5728\u7cfb\u7edf\u8fd0\u884c\u65f6\uff0c\u53ef\u4ee5\u6839\u636e\u9700\u8981\u7075\u6d3b\u5730\u8c03\u6574\u5185\u6838\u529f\u80fd\uff0c\u800c\u65e0\u9700\u91cd\u542f\u7cfb\u7edf\uff0c\u63d0\u9ad8\u4e86\u7cfb\u7edf\u7684\u53ef\u9760\u6027\u548c\u53ef\u7528\u6027\u3002 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