{"id":37823,"date":"2025-04-22T21:43:46","date_gmt":"2025-04-22T13:43:46","guid":{"rendered":"https:\/\/www.yunshan.net\/blog\/?p=37823"},"modified":"2025-04-22T21:43:46","modified_gmt":"2025-04-22T13:43:46","slug":"ebpf%e5%9c%a8%e7%b3%bb%e7%bb%9f%e5%85%bc%e5%ae%b9%e6%80%a7%e5%92%8c%e4%ba%92%e6%93%8d%e4%bd%9c%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\/37823.html","title":{"rendered":"eBPF\u5728\u7cfb\u7edf\u517c\u5bb9\u6027\u548c\u4e92\u64cd\u4f5c\u6027\u4e2d\u8d77\u5230\u4e86\u4ec0\u4e48\u4f5c\u7528"},"content":{"rendered":"

\n

\"eBPF\u5728\u7cfb\u7edf\u517c\u5bb9\u6027\u548c\u4e92\u64cd\u4f5c\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\u517c\u5bb9\u6027\u548c\u4e92\u64cd\u4f5c\u6027\u65b9\u9762\u53d1\u6325\u7740\u91cd\u8981\u4f5c\u7528\u3002\u672c\u6587\u5c06\u6df1\u5165\u63a2\u8ba8eBPF\u5728\u8fd9\u4e24\u4e2a\u9886\u57df\u7684\u5177\u4f53\u5e94\u7528\u548c\u5f71\u54cd\u3002<\/p>\n

\u4e00\u3001eBPF\u5728\u7cfb\u7edf\u517c\u5bb9\u6027\u4e2d\u7684\u4f5c\u7528<\/h2>\n

1. \u8de8\u5185\u6838\u7684\u53ef\u79fb\u690d\u6027<\/strong><\/p>\n

  • eBPF\u7a0b\u5e8f\u53ef\u4ee5\u8bbf\u95ee\u5185\u6838\u6570\u636e\u7ed3\u6784\uff0c\u4f46\u8fd9\u4e9b\u7ed3\u6784\u5728\u4e0d\u540c\u5185\u6838\u7248\u672c\u4e2d\u53ef\u80fd\u53d1\u751f\u53d8\u5316\u3002\u8fc7\u53bb\u7f16\u8bd1eBPF\u7a0b\u5e8f\u65f6\uff0c\u9700\u57fa\u4e8e\u76ee\u6807\u5185\u6838\u517c\u5bb9\u7684\u5934\u6587\u4ef6\u96c6\u3002\u4f8b\u5982\uff0c\u5728\u4e00\u4e9b\u65e7\u5185\u6838\u7248\u672c\u4e2d\uff0c\u6570\u636e\u7ed3\u6784\u7684\u5b9a\u4e49\u53ef\u80fd\u4e0e\u65b0\u5185\u6838\u6709\u6240\u4e0d\u540c\uff0c\u8fd9\u5c31\u5bfc\u81f4\u4e86\u517c\u5bb9\u6027\u95ee\u9898\u3002<\/li>\n
  • \u4e3a\u89e3\u51b3\u8de8\u5185\u6838\u7684\u53ef\u79fb\u690d\u6027\u95ee\u9898\uff0cBCC\uff08BPF Compiler Collection\uff09\u9879\u76ee\u91c7\u53d6\u5728\u8fd0\u884c\u65f6\u7f16\u8bd1eBPF\u4ee3\u7801\u7684\u65b9\u6cd5\uff0c\u5728\u76ee\u6807\u673a\u5668\u4e0a\u5c31\u5730\u8fdb\u884c\u3002\u4f46\u8fd9\u9700\u8981\u5728\u6bcf\u4e2a\u76ee\u6807\u673a\u5668\u4e0a\u5b89\u88c5\u7f16\u8bd1\u5de5\u5177\u94fe\uff0c\u4e14\u8981\u7b49\u5f85\u7f16\u8bd1\u5b8c\u6210\uff0c\u5e76\u4e14\u6587\u4ef6\u7cfb\u7edf\u4e0a\u5fc5\u987b\u6709\u5185\u6838\u5934\u6587\u4ef6\uff08\u5b9e\u9645\u4e0a\u5e76\u4e0d\u603b\u662f\u8fd9\u6837\uff09\u3002<\/li>\n
  • CO\n
  • RE\uff08Compile Once\uff0cRun Everyone\uff0c\u7f16\u8bd1\u4e00\u6b21\uff0c\u5230\u5904\u8fd0\u884c\uff09\u65b9\u6cd5\u7684\u51fa\u73b0\u6539\u5584\u4e86\u8fd9\u79cd\u60c5\u51b5\u3002\u5b83\u7531BTF\uff08BPF Type Format\uff09\u3001libbpf\uff08BPF\u5e93\uff09\u3001\u7f16\u8bd1\u5668\u652f\u6301\u548c\u53ef\u9009\u7684BPF\u9aa8\u67b6\u7b49\u5143\u7d20\u7ec4\u6210\u3002BTF\u662f\u4e00\u79cd\u7528\u4e8e\u8868\u8fbe\u6570\u636e\u7ed3\u6784\u548c\u51fd\u6570\u7b7e\u540d\u5e03\u5c40\u7684\u683c\u5f0f\uff0c\u73b0\u4ee3Linux\u5185\u6838\u652f\u6301BTF\uff0c\u53ef\u4ece\u8fd0\u884c\u4e2d\u7684\u7cfb\u7edf\u4e2d\u751f\u6210\u5305\u542bBPF\u7a0b\u5e8f\u53ef\u80fd\u9700\u8981\u7684\u5185\u6838\u6570\u636e\u7ed3\u6784\u4fe1\u606f\u7684vmlinux.h\u5934\u6587\u4ef6\u3002libbpf\u4e00\u65b9\u9762\u63d0\u4f9b\u52a0\u8f7deBPF\u7a0b\u5e8f\u548c\u6620\u5c04\u5230\u5185\u6838\u7684\u529f\u80fd\uff0c\u53e6\u4e00\u65b9\u9762\u4f9d\u9760BTF\u4fe1\u606f\u8c03\u6574eBPF\u4ee3\u7801\uff0c\u4ee5\u5f25\u8865\u7f16\u8bd1\u65f6\u4e0e\u76ee\u6807\u673a\u5668\u4e0a\u6570\u636e\u7ed3\u6784\u7684\u5dee\u5f02\u3002clang\u7f16\u8bd1\u5668\u7f16\u8bd1eBPF\u7a0b\u5e8f\u65f6\u5305\u62ecBTF\u91cd\u5b9a\u4f4d\uff0c\u4f7f\u5f97libbpf\u5728\u52a0\u8f7dBPF\u7a0b\u5e8f\u548c\u6620\u5c04\u5230\u5185\u6838\u65f6\u77e5\u9053\u8981\u8c03\u6574\u4ec0\u4e48\u3002\u4f7f\u7528bpftool gen skeleton\u53ef\u4ece\u7f16\u8bd1\u7684BPF\u5bf9\u8c61\u6587\u4ef6\u4e2d\u81ea\u52a8\u751f\u6210\u9aa8\u67b6\uff0c\u5305\u542b\u7528\u6237\u7a7a\u95f4\u4ee3\u7801\u53ef\u65b9\u4fbf\u8c03\u7528\u7684\u51fd\u6570\uff0c\u7ba1\u7406BPF\u7a0b\u5e8f\u7684\u751f\u547d\u5468\u671f\u3002<\/li>\n<\/li>\n

    2. \u7528\u6237\u7a7a\u95f4eBPF\u8fd0\u884c\u65f6\u7684\u517c\u5bb9\u6027\u6269\u5c55<\/strong><\/p>\n

  • \u867d\u7136eBPF\u6700\u521d\u4e3a\u5185\u6838\u8bbe\u8ba1\uff0c\u4f46\u5185\u6838\u5bf9\u4e8eGPL LICENSE\u7684\u9650\u5236\u4ee5\u53ca\u7528\u6237\u7a7a\u95f4\u7684\u5de8\u5927\u6f5c\u529b\u50ac\u751f\u4e86\u7528\u6237\u7a7a\u95f4eBPF\u8fd0\u884c\u65f6\u3002\u8fd9\u4e9b\u8fd0\u884c\u65f6\u5141\u8bb8\u5f00\u53d1\u8005\u5728\u5185\u6838\u4e4b\u5916\u5229\u7528eBPF\u7684\u80fd\u529b\uff0c\u63d0\u4f9b\u4e86\u5185\u6838\u4e4b\u5916\u7684\u8fd0\u884c\u5e73\u53f0\uff0c\u6269\u5c55\u4e86\u5176\u5b9e\u7528\u6027\u548c\u9002\u7528\u6027\uff0c\u540c\u65f6\u4e0d\u53d7\u9650\u4e8eGPL LICENSE\u3002\u4f8b\u5982\uff0cuBPF\u662f\u5c06eBPF\u5f15\u5165\u7528\u6237\u7a7a\u95f4\u7684\u65e9\u671f\u5c1d\u8bd5\u4e4b\u4e00\uff0c\u5176\u975eGPL\u8bb8\u53ef\u8bc1\uff08Apache\uff09\u4f7f\u5176\u9002\u7528\u4e8e\u5404\u79cd\u9879\u76ee\uff0c\u5305\u62ec\u975e\u5f00\u6e90\u9879\u76ee\u3002uBPF\u6b63\u5728\u8fce\u5934\u8d76\u4e0a\u5185\u6838\u53d1\u5c55\uff0c\u7279\u522b\u662f\u5fae\u8f6f\u4e3a\u5176eBPF Windows\u5b9e\u73b0\u505a\u51fa\u7684\u8d21\u732e\uff0c\u5e76\u4e14\u5f00\u53d1uBPF\u548crbPF\u7a0b\u5e8f\u53ef\u80fd\u9700\u8981\u7279\u5b9a\u5de5\u5177\u94fe\uff0c\u5bf9\u4e00\u4e9b\u7528\u6237\u662f\u969c\u788d\uff0c\u4e14uBPF\u53ea\u6709\u6709\u9650\u7684\u54c8\u5e0cmaps\u5b9e\u73b0\uff0c\u5bf9\u5927\u591a\u6570\u573a\u666f\u53ef\u80fd\u4e0d\u591f\uff0c\u672c\u8eab\u53ea\u662f\u865a\u62df\u673a\/\u89e3\u91ca\u5668\uff0c\u5728\u5b9e\u9645\u4f7f\u7528\u4e2d\u9700\u7f16\u5199\u80f6\u6c34\u4ee3\u7801\uff0c\u548c\u5176\u4ed6\u7528\u6237\u7a7a\u95f4\u7a0b\u5e8f\u7f16\u8bd1\u3001\u94fe\u63a5\u540e\u624d\u80fd\u4f7f\u7528\u3002rbPF\u548cuBPF\u76f8\u4f3c\uff0c\u91cd\u70b9\u662f\u4f7f\u7528Rust\u5f00\u53d1\uff0c\u5176\u8bb8\u53ef\u8bc1\uff08MIT\uff09\u5141\u8bb8\u5728\u5404\u79cd\u9879\u76ee\u4e2d\u5e7f\u6cdb\u91cd\u7528\uff0c\u4f46\u7f3a\u4e4feBPF Maps\u652f\u6301\uff0c\u4ec5\u4e3ax86_64\u63d0\u4f9bJIT\u652f\u6301\uff0c\u4e5f\u9700\u8981\u7f16\u8bd1\u548c\u624b\u52a8\u5d4c\u5165\u5bf9\u5e94\u7684\u5e94\u7528\u7a0b\u5e8f\u4e2d\u624d\u53ef\u4ee5\u4f7f\u7528\u3002\u8fd8\u6709bpftime\u8fd9\u79cd\u7528\u6237\u6001eBPF\u8fd0\u884c\u65f6\uff0c\u8fdb\u4e00\u6b65\u62d3\u5c55\u4e86eBPF\u7684\u80fd\u529b\uff0c\u4f7f\u73b0\u6709\u7684eBPF\u5de5\u5177\u548c\u5e94\u7528\uff0c\u4f8b\u5982BCC tools\uff0cbpftrace\uff0cDeepflow\u7b49\uff0c\u80fd\u591f\u4e0d\u9700\u8981\u8fdb\u884c\u4ee3\u7801\u4fee\u6539\u5373\u53ef\u5728\u975e\u7279\u6743\u7528\u6237\u7a7a\u95f4\u8fd0\u884c\uff0c\u540c\u65f6\u4f7f\u7528\u548c\u5185\u6838eBPF\u76f8\u540c\u7684\u5e93\u548c\u5de5\u5177\u94fe\uff0c\u4e0d\u4ec5\u63d0\u4f9bUprobe\u548c\u7cfb\u7edf\u8c03\u7528\u8ffd\u8e2a\u70b9\u7b49\u52a8\u6001\u8ffd\u8e2a\u6216\u6269\u5c55\u673a\u5236\uff0c\u8fd8\u76f8\u6bd4\u5185\u6838Uprobe\u6709\u4e00\u4e2a\u6570\u91cf\u7ea7\u7684\u6027\u80fd\u63d0\u5347\uff0c\u5e76\u4e14\u548c\u5185\u6838eBPF\u4e00\u6837\uff0c\u65e0\u9700\u624b\u52a8\u8fdb\u884c\u4ee3\u7801\u63d2\u6869\u6216\u91cd\u542f\u8fdb\u7a0b\uff0c\u901a\u8fc7\u7528\u6237\u6001\u5171\u4eab\u5185\u5b58\u652f\u6301\u8fdb\u7a0b\u95f4eBPF maps\uff0c\u540c\u65f6\u517c\u5bb9\u5185\u6838eBPF maps\uff0c\u80fd\u591f\u5b9e\u73b0\u4e0e\u5185\u6838eBPF\u57fa\u7840\u8bbe\u65bd\u7684\u65e0\u7f1d\u64cd\u4f5c\uff0c\u5305\u542b\u9488\u5bf9\u591a\u79cd\u67b6\u6784\u7684\u9ad8\u6027\u80fdLLVM JIT\/AOT\u7f16\u8bd1\u5668\u3002<\/li>\n

    \u4e8c\u3001eBPF\u5728\u4e92\u64cd\u4f5c\u6027\u4e2d\u7684\u4f5c\u7528<\/h2>\n

    1. \u5f62\u6210\u66f4\u6210\u719f\u7684\u6807\u51c6\u4fc3\u8fdb\u4e92\u64cd\u4f5c\u6027\u548c\u53ef\u79fb\u690d\u6027<\/strong><\/p>\n

  • \u66f4\u6210\u719f\u7684eBPF\u6807\u51c6\u6709\u52a9\u4e8e\u4fc3\u8fdbeBPF\u7684\u4e92\u64cd\u4f5c\u6027\u548c\u53ef\u79fb\u690d\u6027\u3002\u5f53\u4e0d\u540c\u7684\u7cfb\u7edf\u6216\u5e94\u7528\u90fd\u9075\u5faa\u76f8\u540c\u7684eBPF\u6807\u51c6\u65f6\uff0c\u5b83\u4eec\u4e4b\u95f4\u7684\u4e92\u64cd\u4f5c\u6027\u4f1a\u5927\u5927\u589e\u5f3a\u3002\u4f8b\u5982\uff0c\u5728\u4e0d\u540c\u7684Linux\u53d1\u884c\u7248\u6216\u8005\u4e0d\u540c\u7684\u4e91\u5e73\u53f0\u4e0a\uff0c\u5982\u679c\u90fd\u91c7\u7528\u4e86\u7edf\u4e00\u7684eBPF\u6807\u51c6\uff0c\u90a3\u4e48\u57fa\u4e8eeBPF\u5f00\u53d1\u7684\u5de5\u5177\u548c\u5e94\u7528\u5c31\u53ef\u4ee5\u66f4\u5bb9\u6613\u5730\u5728\u8fd9\u4e9b\u73af\u5883\u4e2d\u8fd0\u884c\uff0c\u800c\u4e0d\u4f1a\u56e0\u4e3a\u73af\u5883\u7684\u5dee\u5f02\u800c\u51fa\u73b0\u517c\u5bb9\u6027\u95ee\u9898\u3002<\/li>\n

    2. \u5728\u5b89\u5168\u53ef\u4fe1\u534f\u8bae\u6808\u4e2d\u7684\u4e92\u64cd\u4f5c\u6027\u5e94\u7528<\/strong><\/p>\n

  • \u4ee5\u6e05\u534e\u5927\u5b66\u5f90\u606a\u8001\u5e08\u56e2\u961f\u63d0\u51fa\u7684\u9762\u5411\u65e0\u72b6\u6001\u534f\u8bae\u653b\u51fb\u7684\u9632\u5fa1\u7cfb\u7edf\u2014\u2014ICMP Filter\u4e3a\u4f8b\uff0c\u5176\u57fa\u4e8eLinux\u5185\u6838\u7684eBPF\u5b50\u7cfb\u7edf\u5b9e\u73b0\u3002eBPF\u80fd\u591f\u5728\u4e0d\u6539\u53d8\u5185\u6838\u6e90\u7801\u6216\u52a0\u8f7d\u5185\u6838\u6a21\u5757\u7684\u524d\u63d0\u4e0b\u5e2e\u52a9\u7528\u6237\u6269\u5c55\u989d\u5916\u529f\u80fd\uff0c\u5982\u4eca\u5df2\u88ab\u5b9e\u73b0\u5728Linux\u4e3b\u7ebf\u4e2d\u3002eBPF\u7684\u6838\u5fc3\u5b9e\u73b0\u662f\u4e00\u4e2a\u865a\u62df\u673a\uff0c\u80fd\u591f\u8fd0\u884c\u81ea\u5b9a\u4e49\u768464\u4f4d\u7684RISC\u6307\u4ee4\u96c6\u3002\u7528\u6237\u901a\u8fc7\u7f16\u5199\u81ea\u5b9a\u4e49\u7684eBPF\u7a0b\u5e8f\uff0c\u901a\u8fc7\u7f16\u8bd1\u5668\u751f\u6210BPF\u5b57\u8282\u7801\uff0c\u968f\u540e\u52a0\u8f7d\u8fdb\u5185\u6838\u4e2d\u7684eBPF\u5b50\u7cfb\u7edf\u6267\u884cJIT\uff08Just\n
  • in – Time\uff09\u7f16\u8bd1\u548c\u9a8c\u8bc1\uff0c\u5e76\u8c03\u7528helper API\u4e0e\u64cd\u4f5c\u7cfb\u7edf\u8fd0\u884c\u65f6\u8fdb\u884c\u4ea4\u4e92\u3002eBPF\u5b50\u7cfb\u7edf\u4e2d\u540c\u65f6\u5b9e\u73b0\u4e86eBPF Map\uff0c\u7528\u6237\u53ef\u4ee5\u901a\u8fc7eBPF\u7a0b\u5e8f\u548c\u7cfb\u7edf\u8c03\u7528\u4e24\u79cd\u65b9\u5f0f\u8bbf\u95eeeBPF Map\uff0c\u4f7f\u7528API\u5bf9\u6570\u636e\u8fdb\u884c\u8bfb\u5199\uff0c\u4ee5\u5b9e\u73b0\u72b6\u6001\u5b58\u50a8\u4e0e\u901a\u4fe1\u9700\u6c42\u3002eBPF\u901a\u8fc7\u6307\u5b9a\u7a0b\u5e8f\u7c7b\u578b\u4ee5\u5c06eBPF\u7a0b\u5e8f\u6302\u8f7d\u81f3\u5185\u6838\u4e2d\u9884\u8bbe\u7684\u4e0d\u540c\u7684\u94a9\u5b50\u5904\uff0c\u622a\u81f3\u76ee\u524deBPF\u4e2d\u8d1f\u8d23\u534f\u8bae\u6808\u5165\u7ad9\u6570\u636e\u5305\u5904\u7406\u7684\u7a0b\u5e8f\u7c7b\u578b\u4e3b\u8981\u67093\u7c7b\uff0cxdp\uff08Linux 4.8\u5f15\u5165\uff09\uff0ctc\uff08Linux 4.1\u5f15\u5165\uff09\u548cnetfilter\uff08Linux 6.4\u5f15\u5165\uff09\u3002ICMP Filter\u9632\u5fa1\u673a\u5236\u4ee5eBPF\u7684netfilter\u7c7b\u7a0b\u5e8f\u7684\u65b9\u5f0f\u5b9e\u73b0\uff0c\u6302\u8f7d\u5728NF_INET_LOCAL_IN\u94a9\u5b50\u5904\uff0c\u8be5\u94a9\u5b50\u4f4d\u4e8eLinux\u5185\u6838\u7684IP\u6570\u636e\u5305\u5165\u7ad9\u8def\u5f84\u4e0a\uff0c\u5bf9\u4e8e\u6240\u6709\u7684\u5165\u7ad9\u6570\u636e\u5305\u7684\u5904\u7406\uff0c\u5747\u4f1a\u8c03\u7528\u8be5eBPF\u7a0b\u5e8f\u8fdb\u884c\u989d\u5916\u7684\u8fc7\u6ee4\u548c\u9632\u5fa1\u3002\u8fd9\u4f53\u73b0\u4e86eBPF\u5728\u4e0d\u540c\u7684\u5b89\u5168\u534f\u8bae\u6808\u4e2d\u7684\u4e92\u64cd\u4f5c\u6027\u5e94\u7528\uff0c\u80fd\u591f\u4ee5\u9632\u5fa1\u7ec4\u4ef6\u7684\u5f62\u5f0f\u70ed\u52a0\u8f7d\u8fdbLinux\u5185\u6838\u4e2d\uff0c\u76d1\u6d4b\u5165\u7ad9ICMP\u62a5\u6587\u7684\u9891\u7387\u548c\u8bed\u4e49\u7279\u6027\uff0c\u5728\u7ef4\u6301\u8f7b\u91cf\u5316\u8bbe\u8ba1\u7684\u5bf9\u6f5c\u5728\u7684\u6076\u610f\u653b\u51fb\u62a5\u6587\u8fdb\u884c\u63d0\u524d\u8fc7\u6ee4\uff0c\u5e76\u5411\u7528\u6237\u53ca\u65f6\u53cd\u9988\u9632\u5fa1\u65e5\u5fd7\u3002<\/li>\n<\/li>\n

    eBPF\u5728\u7cfb\u7edf\u517c\u5bb9\u6027\u548c\u4e92\u64cd\u4f5c\u6027\u65b9\u9762\u7684\u4f5c\u7528\u663e\u8457\u3002\u5728\u7cfb\u7edf\u517c\u5bb9\u6027\u65b9\u9762\uff0c\u5b83\u901a\u8fc7\u8de8\u5185\u6838\u7684\u53ef\u79fb\u690d\u6027\u89e3\u51b3\u65b9\u6848\uff08\u5982CO – RE\u65b9\u6cd5\uff09\u548c\u7528\u6237\u7a7a\u95f4eBPF\u8fd0\u884c\u65f6\u7684\u53d1\u5c55\uff0c\u5927\u5927\u63d0\u9ad8\u4e86eBPF\u7a0b\u5e8f\u5728\u4e0d\u540c\u5185\u6838\u7248\u672c\u548c\u7528\u6237\u7a7a\u95f4\u7684\u517c\u5bb9\u6027\u3002\u5728\u4e92\u64cd\u4f5c\u6027\u65b9\u9762\uff0ceBPF\u901a\u8fc7\u5f62\u6210\u66f4\u6210\u719f\u7684\u6807\u51c6\u548c\u5728\u5b89\u5168\u53ef\u4fe1\u534f\u8bae\u6808\u4e2d\u7684\u5e94\u7528\uff0c\u4fc3\u8fdb\u4e86\u4e0d\u540c\u7cfb\u7edf\u548c\u5e94\u7528\u4e4b\u95f4\u7684\u4e92\u64cd\u4f5c\u6027\u548c\u53ef\u79fb\u690d\u6027\u3002\u8fd9\u4e9b\u8fdb\u6b65\u4e0d\u4ec5\u63a8\u52a8\u4e86eBPF\u6280\u672f\u7684\u53d1\u5c55\uff0c\u4e5f\u4e3a\u6574\u4e2a\u7cfb\u7edf\u7684\u517c\u5bb9\u6027\u548c\u4e92\u64cd\u4f5c\u6027\u63d0\u4f9b\u4e86\u65b0\u7684\u89e3\u51b3\u65b9\u6848\u3002\u968f\u7740eBPF\u6280\u672f\u7684\u4e0d\u65ad\u53d1\u5c55\u548c\u5b8c\u5584\uff0c\u6211\u4eec\u53ef\u4ee5\u671f\u5f85\u5b83\u5728\u672a\u6765\u7684\u7cfb\u7edf\u517c\u5bb9\u6027\u548c\u4e92\u64cd\u4f5c\u6027\u65b9\u9762\u53d1\u6325\u66f4\u5927\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\u517c\u5bb9\u6027\u548c\u4e92\u64cd\u4f5c\u6027\u65b9\u9762\u53d1\u6325\u7740\u91cd\u8981\u4f5c\u7528\u3002\u672c\u6587\u5c06\u6df1\u5165\u63a2\u8ba8eBPF\u5728\u8fd9\u4e24\u4e2a\u9886\u57df\u7684\u5177\u4f53\u5e94\u7528\u548c\u5f71\u54cd\u3002 \u4e00\u3001eBPF\u5728\u7cfb\u7edf\u517c\u5bb9\u6027\u4e2d\u7684\u4f5c\u7528 1. \u8de8\u5185\u6838\u7684\u53ef\u79fb\u690d\u6027 eBPF\u7a0b\u5e8f\u53ef\u4ee5\u8bbf\u95ee\u5185\u6838\u6570\u636e\u7ed3\u6784\uff0c\u4f46\u8fd9\u4e9b\u7ed3\u6784\u5728\u4e0d\u540c\u5185\u6838\u7248\u672c\u4e2d\u53ef\u80fd\u53d1\u751f\u53d8\u5316\u3002\u8fc7\u53bb\u7f16\u8bd1eBPF\u7a0b\u5e8f\u65f6\uff0c\u9700\u57fa\u4e8e\u76ee\u6807\u5185\u6838\u517c\u5bb9\u7684\u5934\u6587\u4ef6\u96c6\u3002\u4f8b\u5982\uff0c\u5728\u4e00\u4e9b\u65e7\u5185\u6838\u7248\u672c\u4e2d\uff0c\u6570\u636e\u7ed3\u6784\u7684\u5b9a\u4e49\u53ef\u80fd\u4e0e\u65b0\u5185\u6838\u6709\u6240\u4e0d\u540c\uff0c\u8fd9\u5c31\u5bfc\u81f4\u4e86\u517c\u5bb9\u6027\u95ee\u9898\u3002 \u4e3a\u89e3\u51b3\u8de8\u5185\u6838\u7684\u53ef\u79fb\u690d\u6027\u95ee\u9898\uff0cBCC\uff08BPF Compiler Collection\uff09\u9879\u76ee\u91c7\u53d6\u5728\u8fd0\u884c\u65f6\u7f16\u8bd1eBPF\u4ee3\u7801\u7684\u65b9\u6cd5\uff0c\u5728\u76ee\u6807\u673a\u5668\u4e0a\u5c31\u5730\u8fdb\u884c\u3002\u4f46\u8fd9\u9700\u8981\u5728\u6bcf\u4e2a\u76ee\u6807\u673a\u5668\u4e0a\u5b89\u88c5\u7f16\u8bd1\u5de5\u5177\u94fe\uff0c\u4e14\u8981\u7b49\u5f85\u7f16\u8bd1\u5b8c\u6210\uff0c\u5e76\u4e14\u6587\u4ef6\u7cfb\u7edf\u4e0a\u5fc5\u987b\u6709\u5185\u6838\u5934\u6587\u4ef6\uff08\u5b9e\u9645\u4e0a\u5e76\u4e0d\u603b\u662f\u8fd9\u6837\uff09\u3002 CO RE\uff08Compile Once\uff0cRun Everyone\uff0c\u7f16\u8bd1\u4e00\u6b21\uff0c\u5230\u5904\u8fd0\u884c\uff09\u65b9\u6cd5\u7684\u51fa\u73b0\u6539\u5584\u4e86\u8fd9\u79cd\u60c5\u51b5\u3002\u5b83\u7531BTF\uff08BPF Type Format\uff09\u3001libbpf\uff08BPF\u5e93\uff09\u3001\u7f16\u8bd1\u5668\u652f\u6301\u548c\u53ef\u9009\u7684BPF\u9aa8\u67b6\u7b49\u5143\u7d20\u7ec4\u6210\u3002BTF\u662f\u4e00\u79cd\u7528\u4e8e\u8868\u8fbe\u6570\u636e\u7ed3\u6784\u548c\u51fd\u6570\u7b7e\u540d\u5e03\u5c40\u7684\u683c\u5f0f\uff0c\u73b0\u4ee3Linux\u5185\u6838\u652f\u6301BTF\uff0c\u53ef\u4ece\u8fd0\u884c\u4e2d\u7684\u7cfb\u7edf\u4e2d\u751f\u6210\u5305\u542bBPF\u7a0b\u5e8f\u53ef\u80fd\u9700\u8981\u7684\u5185\u6838\u6570\u636e\u7ed3\u6784\u4fe1\u606f\u7684vmlinux.h\u5934\u6587\u4ef6\u3002libbpf\u4e00\u65b9\u9762\u63d0\u4f9b\u52a0\u8f7deBPF\u7a0b\u5e8f\u548c\u6620\u5c04\u5230\u5185\u6838\u7684\u529f\u80fd\uff0c\u53e6\u4e00\u65b9\u9762\u4f9d\u9760BTF\u4fe1\u606f\u8c03\u6574eBPF\u4ee3\u7801\uff0c\u4ee5\u5f25\u8865\u7f16\u8bd1\u65f6\u4e0e\u76ee\u6807\u673a\u5668\u4e0a\u6570\u636e\u7ed3\u6784\u7684\u5dee\u5f02\u3002clang\u7f16\u8bd1\u5668\u7f16\u8bd1eBPF\u7a0b\u5e8f\u65f6\u5305\u62ecBTF\u91cd\u5b9a\u4f4d\uff0c\u4f7f\u5f97libbpf\u5728\u52a0\u8f7dBPF\u7a0b\u5e8f\u548c\u6620\u5c04\u5230\u5185\u6838\u65f6\u77e5\u9053\u8981\u8c03\u6574\u4ec0\u4e48\u3002\u4f7f\u7528bpftool gen skeleton\u53ef\u4ece\u7f16\u8bd1\u7684BPF\u5bf9\u8c61\u6587\u4ef6\u4e2d\u81ea\u52a8\u751f\u6210\u9aa8\u67b6\uff0c\u5305\u542b\u7528\u6237\u7a7a\u95f4\u4ee3\u7801\u53ef\u65b9\u4fbf\u8c03\u7528\u7684\u51fd\u6570\uff0c\u7ba1\u7406BPF\u7a0b\u5e8f\u7684\u751f\u547d\u5468\u671f\u3002 2. \u7528\u6237\u7a7a\u95f4eBPF\u8fd0\u884c\u65f6\u7684\u517c\u5bb9\u6027\u6269\u5c55 \u867d\u7136eBPF\u6700\u521d\u4e3a\u5185\u6838\u8bbe\u8ba1\uff0c\u4f46\u5185\u6838\u5bf9\u4e8eGPL LICENSE\u7684\u9650\u5236\u4ee5\u53ca\u7528\u6237\u7a7a\u95f4\u7684\u5de8\u5927\u6f5c\u529b\u50ac\u751f\u4e86\u7528\u6237\u7a7a\u95f4eBPF\u8fd0\u884c\u65f6\u3002\u8fd9\u4e9b\u8fd0\u884c\u65f6\u5141\u8bb8\u5f00\u53d1\u8005\u5728\u5185\u6838\u4e4b\u5916\u5229\u7528eBPF\u7684\u80fd\u529b\uff0c\u63d0\u4f9b\u4e86\u5185\u6838\u4e4b\u5916\u7684\u8fd0\u884c\u5e73\u53f0\uff0c\u6269\u5c55\u4e86\u5176\u5b9e\u7528\u6027\u548c\u9002\u7528\u6027\uff0c\u540c\u65f6\u4e0d\u53d7\u9650\u4e8eGPL LICENSE\u3002\u4f8b\u5982\uff0cuBPF\u662f\u5c06eBPF\u5f15\u5165\u7528\u6237\u7a7a\u95f4\u7684\u65e9\u671f\u5c1d\u8bd5\u4e4b\u4e00\uff0c\u5176\u975eGPL\u8bb8\u53ef\u8bc1\uff08Apache\uff09\u4f7f\u5176\u9002\u7528\u4e8e\u5404\u79cd\u9879\u76ee\uff0c\u5305\u62ec\u975e\u5f00\u6e90\u9879\u76ee\u3002uBPF\u6b63\u5728\u8fce\u5934\u8d76\u4e0a\u5185\u6838\u53d1\u5c55\uff0c\u7279\u522b\u662f\u5fae\u8f6f\u4e3a\u5176eBPF Windows\u5b9e\u73b0\u505a\u51fa\u7684\u8d21\u732e\uff0c\u5e76\u4e14\u5f00\u53d1uBPF\u548crbPF\u7a0b\u5e8f\u53ef\u80fd\u9700\u8981\u7279\u5b9a\u5de5\u5177\u94fe\uff0c\u5bf9\u4e00\u4e9b\u7528\u6237\u662f\u969c\u788d\uff0c\u4e14uBPF\u53ea\u6709\u6709\u9650\u7684\u54c8\u5e0cmaps\u5b9e\u73b0\uff0c\u5bf9\u5927\u591a\u6570\u573a\u666f\u53ef\u80fd\u4e0d\u591f\uff0c\u672c\u8eab\u53ea\u662f\u865a\u62df\u673a\/\u89e3\u91ca\u5668\uff0c\u5728\u5b9e\u9645\u4f7f\u7528\u4e2d\u9700\u7f16\u5199\u80f6\u6c34\u4ee3\u7801\uff0c\u548c\u5176\u4ed6\u7528\u6237\u7a7a\u95f4\u7a0b\u5e8f\u7f16\u8bd1\u3001\u94fe\u63a5\u540e\u624d\u80fd\u4f7f\u7528\u3002rbPF\u548cuBPF\u76f8\u4f3c\uff0c\u91cd\u70b9\u662f\u4f7f\u7528Rust\u5f00\u53d1\uff0c\u5176\u8bb8\u53ef\u8bc1\uff08MIT\uff09\u5141\u8bb8\u5728\u5404\u79cd\u9879\u76ee\u4e2d\u5e7f\u6cdb\u91cd\u7528\uff0c\u4f46\u7f3a\u4e4feBPF 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