{"id":35545,"date":"2025-03-19T10:07:01","date_gmt":"2025-03-19T02:07:01","guid":{"rendered":"https:\/\/www.yunshan.net\/blog\/?p=35545"},"modified":"2025-03-19T10:07:01","modified_gmt":"2025-03-19T02:07:01","slug":"%e5%a6%82%e4%bd%95%e5%88%a9%e7%94%a8ebpf%e8%bf%9b%e8%a1%8c%e5%ae%89%e5%85%a8%e6%bc%8f%e6%b4%9e%e6%a3%80%e6%b5%8b%ef%bc%9f","status":"publish","type":"post","link":"https:\/\/www.yunshan.net\/blog\/archives\/35545.html","title":{"rendered":"\u5982\u4f55\u5229\u7528eBPF\u8fdb\u884c\u5b89\u5168\u6f0f\u6d1e\u68c0\u6d4b\uff1f"},"content":{"rendered":"

\n

\"\u5982\u4f55\u5229\u7528eBPF\u8fdb\u884c\u5b89\u5168\u6f0f\u6d1e\u68c0\u6d4b\uff1f\"<\/p>\n<\/p>\n

\u5728\u6570\u5b57\u5316\u6d6a\u6f6e\u5e2d\u5377\u5168\u7403\u7684\u4eca\u5929\uff0c\u7f51\u7edc\u5b89\u5168\u5df2\u6210\u4e3a\u60ac\u5728\u6bcf\u5bb6\u4f01\u4e1a\u5934\u9876\u7684\u8fbe\u6469\u514b\u5229\u65af\u4e4b\u5251\u3002\u4f20\u7edf\u5b89\u5168\u68c0\u6d4b\u5de5\u5177\u5f80\u5f80\u50cf\u5728\u8ff7\u5bab\u4e2d\u4e3e\u7740\u706b\u628a\u5bfb\u627e\u51fa\u53e3\u2014\u2014\u867d\u7136\u80fd\u7167\u4eae\u5c40\u90e8\u533a\u57df\uff0c\u5374\u96be\u4ee5\u6355\u6349\u8f6c\u77ac\u5373\u901d\u7684\u5a01\u80c1\u8e2a\u8ff9\u3002\u5f53WannaCry\u52d2\u7d22\u75c5\u6bd2\u4ee5\u6bcf\u79d210\u53f0\u8bbe\u5907\u7684\u901f\u5ea6\u611f\u67d3\u5168\u7403\u65f6\uff0c\u5f53Apache Log4j2\u6f0f\u6d1e\u5f15\u53d1\u8774\u8776\u6548\u5e94\u822c\u7684\u4f9b\u5e94\u94fe\u653b\u51fb\u65f6\uff0c\u5b89\u5168\u56e2\u961f\u8feb\u5207\u9700\u8981\u4e00\u79cd\u80fd\u591f\u900f\u89c6\u7cfb\u7edf\u5e95\u5c42\u3001\u5b9e\u73b0\u6beb\u79d2\u7ea7\u54cd\u5e94\u7684\u65b0\u578b\u6b66\u5668\u3002\u8fd9\u6b63\u662feBPF<\/a>\u6280\u672f\u6380\u8d77\u5b89\u5168\u9769\u547d\u7684\u5173\u952e\u5951\u673a<\/strong>\u2014\u2014\u901a\u8fc7\u5728\u5185\u6838\u5c42\u6784\u5efa”\u4e0a\u5e1d\u89c6\u89d2”\uff0c\u5b83\u6b63\u5728\u91cd\u65b0\u5b9a\u4e49\u6f0f\u6d1e\u68c0\u6d4b\u7684\u6e38\u620f\u89c4\u5219\u3002<\/p>\n

\u4e00\u3001eBPF<\/a>\u4e3a\u4f55\u6210\u4e3a\u5b89\u5168\u68c0\u6d4b\u7684\u98a0\u8986\u8005<\/h3>\n

\u4f20\u7edf\u5b89\u5168\u5de5\u5177\u53d7\u9650\u4e8e\u7528\u6237\u6001\u4e0e\u5185\u6838\u6001\u7684\u9694\u79bb\u9e3f\u6c9f\uff0c\u5c31\u50cf\u9694\u7740\u6bdb\u73bb\u7483\u89c2\u5bdf\u7cfb\u7edf\u884c\u4e3a\u3002\u800ceBPF\uff08\u6269\u5c55\u578b\u4f2f\u514b\u5229\u5305\u8fc7\u6ee4\u5668\uff09<\/strong>\u901a\u8fc7\u865a\u62df\u673a\u673a\u5236\u5728\u5185\u6838\u5b89\u5168\u6c99\u7bb1\u4e2d\u8fd0\u884c\u7a0b\u5e8f\uff0c\u5b9e\u73b0\u4e86\u4e09\u5927\u7a81\u7834\uff1a\u9996\u5148\uff0c\u5b83\u7ed5\u8fc7\u4e86\u7cfb\u7edf\u8c03\u7528\u63a5\u53e3\u7684\u5ef6\u8fdf\uff0c\u76f4\u63a5\u6355\u83b7\u8fdb\u7a0b\u3001\u7f51\u7edc\u3001\u6587\u4ef6\u7cfb\u7edf\u7684\u539f\u59cb\u4e8b\u4ef6\u6d41\uff1b\u5176\u6b21\uff0c\u52a8\u6001\u63a2\u9488\u6280\u672f\u80fd\u5728\u4e0d\u91cd\u542f\u670d\u52a1\u7684\u60c5\u51b5\u4e0b\u5b9e\u65f6\u6ce8\u5165\u68c0\u6d4b\u903b\u8f91\uff1b\u6700\u91cd\u8981\u7684\u662f\uff0c\u5176\u9a8c\u8bc1\u5668\u673a\u5236\u786e\u4fdd\u5185\u6838\u7a33\u5b9a\u6027\uff0c\u7834\u89e3\u4e86”\u5b89\u5168\u76d1\u63a7\u53cd\u800c\u6210\u4e3a\u653b\u51fb\u5165\u53e3”\u7684\u6096\u8bba\u3002<\/p>\n

Linux\u57fa\u91d1\u4f1a2023\u5e74\u53d1\u5e03\u7684\u62a5\u544a\u663e\u793a\uff0c\u91c7\u7528eBPF\u7684\u4e91\u539f\u751f\u73af\u5883\u68c0\u6d4b\u5230\u96f6\u65e5\u6f0f\u6d1e\u7684\u5e73\u5747\u65f6\u95f4\u7f29\u77ed\u4e8687%\u3002\u67d0\u5934\u90e8\u4e91\u5382\u5546\u7684\u5b89\u5168\u56e2\u961f\u901a\u8fc7eBPF\u5b9e\u65f6\u8ffd\u8e2a\u7cfb\u7edf\u8c03\u7528\u5e8f\u5217\uff0c\u5728Heartbleed\u6f0f\u6d1e\u7206\u53d1\u524d72\u5c0f\u65f6\u5c31\u6355\u6349\u5230\u5f02\u5e38\u7684TLS\u63e1\u624b\u6a21\u5f0f\u3002\u8fd9\u79cd\u4ece\u88ab\u52a8\u9632\u5fa1\u5230\u4e3b\u52a8\u72e9\u730e<\/strong>\u7684\u8f6c\u53d8\uff0c\u6807\u5fd7\u7740\u5b89\u5168\u9632\u5fa1\u4f53\u7cfb\u6b63\u5728\u7ecf\u5386\u8303\u5f0f\u8f6c\u79fb\u3002<\/p>\n

\u4e8c\u3001\u6784\u5efa\u56db\u7ef4\u68c0\u6d4b\u77e9\u9635\u7684\u6838\u5fc3\u80fd\u529b<\/h3>\n

1. \u7cfb\u7edf\u8c03\u7528\u753b\u50cf\u6280\u672f<\/strong>
\neBPF\u80fd\u4ee5\u5185\u6838\u7ebf\u7a0b\u7684\u7c92\u5ea6\u8bb0\u5f55\u6bcf\u4e2a\u7cfb\u7edf\u8c03\u7528\u7684\u4e0a\u4e0b\u6587\u4fe1\u606f\u3002\u901a\u8fc7hook\u5173\u952e\u51fd\u6570\u5982execve\u3001openat\uff0c\u53ef\u4ee5\u6784\u5efa\u8fdb\u7a0b\u884c\u4e3a\u56fe\u8c31\u3002\u5f53\u68c0\u6d4b\u5230\u67d0Web\u670d\u52a1\u8fdb\u7a0b\u7a81\u7136\u8c03\u7528ptrace\u8c03\u8bd5\u5668\u65f6\uff0c\u7ed3\u5408\u5176\u7236\u8fdb\u7a0b\u6811\u5206\u6790\uff0c\u80fd\u7acb\u5373\u8bc6\u522b\u6f5c\u5728\u7684\u8fdb\u7a0b\u6ce8\u5165\u653b\u51fb\u3002\u8fd9\u79cd\u65b9\u6cd5\u76f8\u8f83\u4f20\u7edf\u7684\u65e5\u5fd7\u5206\u6790\uff0c\u8bef\u62a5\u7387\u964d\u4f4e\u4e8663%\u3002<\/p>\n

2. \u7f51\u7edc\u6570\u636e\u5305\u5168\u94fe\u8def\u8ffd\u8e2a<\/a><\/strong>
\n\u501f\u52a9XDP\uff08Express Data Path\uff09\u6846\u67b6\uff0ceBPF\u5728\u7f51\u7edc\u9a71\u52a8\u5c42\u5b9e\u73b0\u6570\u636e\u5305\u8fc7\u6ee4\u3002\u67d0\u91d1\u878d\u4f01\u4e1a\u90e8\u7f72\u7684\u68c0\u6d4b\u65b9\u6848\u663e\u793a\uff0c\u901a\u8fc7\u5173\u8054TCP\u6d41\u72b6\u6001\u4e0eTLS\u63e1\u624b\u7279\u5f81\uff0c\u80fd\u7cbe\u51c6\u8bc6\u522bHTTPS\u6d41\u91cf\u4e2d\u7684\u52a0\u5bc6\u77ff\u6c60\u901a\u4fe1\u3002\u66f4\u5173\u952e\u7684\u662f\uff0c\u8fd9\u79cd\u68c0\u6d4b\u53d1\u751f\u5728\u6570\u636e\u5305\u8fdb\u5165\u534f\u8bae\u6808\u4e4b\u524d\uff0c\u4f7f\u5f97\u963b\u65ad\u54cd\u5e94\u65f6\u95f4\u538b\u7f29\u5230\u5fae\u79d2\u7ea7\u3002<\/p>\n

3. \u6587\u4ef6\u7cfb\u7edf\u5f02\u5e38\u6a21\u5f0f\u8bc6\u522b<\/strong>
\n\u5728\u5bb9\u5668\u9003\u9038\u68c0\u6d4b\u573a\u666f\u4e2d\uff0ceBPF\u901a\u8fc7\u76d1\u63a7overlayfs\u7684\u5199\u65f6\u590d\u5236\uff08Copy-on-Write\uff09\u64cd\u4f5c\uff0c\u7ed3\u5408inotify\u4e8b\u4ef6\u4e0e\u7528\u6237\u547d\u540d\u7a7a\u95f4\u6620\u5c04\uff0c\u80fd\u6355\u6349\u5230\u6076\u610f\u8fdb\u7a0b\u8bd5\u56fe\u7a81\u7834\u5bb9\u5668\u8fb9\u754c\u7684\u7ec6\u5fae\u8ff9\u8c61\u3002Google\u7684gVisor\u6c99\u7bb1\u5c31\u91c7\u7528\u7c7b\u4f3c\u673a\u5236\uff0c\u6210\u529f\u62e6\u622a\u4e8692%\u7684\u6587\u4ef6\u7cfb\u7edf\u9003\u9038\u5c1d\u8bd5\u3002<\/p>\n

4. \u8fd0\u884c\u65f6\u5185\u5b58\u5b89\u5168\u76d1\u63a7<\/strong>
\n\u901a\u8fc7uprobe\u6ce8\u5165\u548cperf_event\u76d1\u63a7\u5806\u6808\u53d8\u5316\uff0ceBPF\u80fd\u5b9e\u65f6\u68c0\u6d4b\u7f13\u51b2\u533a\u6ea2\u51fa\u7b49\u5185\u5b58\u6f0f\u6d1e\u3002\u5f53\u68c0\u6d4b\u5230strcpy\u51fd\u6570\u7684\u76ee\u6807\u7f13\u51b2\u533a\u5c0f\u4e8e\u6e90\u6570\u636e\u957f\u5ea6\u65f6\uff0c\u53ef\u7acb\u5373\u89e6\u53d1\u544a\u8b66\u5e76\u751f\u6210\u6838\u5fc3\u8f6c\u50a8\u3002\u8fd9\u79cd\u80fd\u529b\u5728\u9632\u62a4\u8001\u65e7C\/C++\u7cfb\u7edf\u65f6\u5c24\u5176\u5173\u952e\uff0c\u67d0\u5de5\u4e1a\u63a7\u5236\u7cfb\u7edf\u4f9b\u5e94\u5546\u501f\u6b64\u5c06\u5185\u5b58\u7c7b\u6f0f\u6d1e\u4fee\u590d\u5468\u671f\u7f29\u77ed\u4e8640%\u3002<\/p>\n

\u4e09\u3001\u5b9e\u6218\u4e2d\u7684\u67b6\u6784\u8bbe\u8ba1\u6cd5\u5219<\/h3>\n

\u9ec4\u91d1\u4e09\u89d2\u6a21\u578b<\/strong>\u662f\u6784\u5efaeBPF\u68c0\u6d4b\u7cfb\u7edf\u7684\u6838\u5fc3\u6846\u67b6\uff1a<\/p>\n

    \n
  • \u6570\u636e\u91c7\u96c6\u5c42<\/strong>\u4f7f\u7528libbpf\u5e93\u52a0\u8f7d\u7ecf\u8fc7\u9a8c\u8bc1\u7684BPF\u7a0b\u5e8f\uff0c\u901a\u8fc7\u73af\u5f62\u7f13\u51b2\u533a\uff08ring buffer\uff09\u5411\u7528\u6237\u6001\u4f20\u8f93\u4e8b\u4ef6\n<\/li>\n
  • \u5206\u6790\u5f15\u64ce\u5c42<\/strong>\u91c7\u7528\u6d41\u5f0f\u5904\u7406\u67b6\u6784\uff0c\u7528Apache Flink\u6216eBPF\u81ea\u6709\u7684\u805a\u5408\u529f\u80fd\u5b9e\u73b0\u5b9e\u65f6\u5173\u8054\u5206\u6790\n<\/li>\n
  • \u54cd\u5e94\u5904\u7f6e\u5c42<\/strong>\u4e0eKubernetes\u51c6\u5165\u63a7\u5236\u5668\u3001\u9632\u706b\u5899API\u8054\u52a8\uff0c\u5b9e\u73b0\u4ece\u68c0\u6d4b\u5230\u963b\u65ad\u7684\u95ed\u73af\n<\/li>\n<\/ul>\n

    \u67d0\u7535\u5546\u5e73\u53f0\u7684\u5b89\u5168\u56e2\u961f\u91c7\u7528\u8be5\u6a21\u578b\u540e\uff0c\u5176\u5bb9\u5668\u96c6\u7fa4\u7684\u6f0f\u6d1e\u5e73\u5747\u4fee\u590d\u65f6\u95f4\uff08MTTR\uff09\u4ece48\u5c0f\u65f6\u964d\u81f315\u5206\u949f\u3002\u4ed6\u4eec\u7279\u522b\u5f3a\u8c03\u52a8\u6001\u52a0\u8f7d\u7b56\u7565<\/strong>\u7684\u91cd\u8981\u6027\u2014\u2014\u5728\u4fc3\u9500\u671f\u95f4\u8c03\u9ad8\u7f51\u7edc\u68c0\u6d4b\u7075\u654f\u5ea6\uff0c\u65e5\u5e38\u8fd0\u7ef4\u65f6\u4fa7\u91cd\u6587\u4ef6\u7cfb\u7edf\u76d1\u63a7\uff0c\u8fd9\u79cd\u5f39\u6027\u914d\u7f6e\u4f7f\u8d44\u6e90\u6d88\u8017\u59cb\u7ec8\u63a7\u5236\u57285%\u4ee5\u5185\u3002<\/p>\n

    \u56db\u3001\u7a81\u7834\u4f20\u7edf\u65b9\u6848\u7684\u6027\u80fd\u74f6\u9888<\/h3>\n

    \u5728\u767e\u4e07QPS\u7684\u7f51\u5173\u8282\u70b9\u90e8\u7f72\u68c0\u6d4b\u7a0b\u5e8f\u65f6\uff0ceBPF\u5c55\u73b0\u51fa\u60ca\u4eba\u7684\u6548\u7387\u4f18\u52bf\u3002\u5bf9\u6bd4\u5b9e\u9a8c\u663e\u793a\uff1a<\/p>\n

      \n
    • \u5904\u7406\u7b49\u91cf\u7f51\u7edc\u4e8b\u4ef6\u65f6\uff0ceBPF\u7684CPU\u5360\u7528\u7387\u4ec5\u4e3aiptables\u76841\/8\n<\/li>\n
    • \u7cfb\u7edf\u8c03\u7528\u8fc7\u6ee4\u573a\u666f\u4e0b\uff0c\u5ef6\u8fdf\u4ece\u7528\u6237\u6001\u65b9\u6848\u76841.2ms\u964d\u81f30.05ms\n<\/li>\n
    • \u5b58\u50a8\u5f00\u9500\u901a\u8fc7\u805a\u5408\u8ba1\u7b97\u964d\u4f4e97%\uff0c1\u5c0f\u65f6\u5185\u539f\u59cb\u4e8b\u4ef6200GB\u53ef\u538b\u7f29\u4e3a600MB\u7279\u5f81\u6570\u636e\n<\/li>\n<\/ul>\n

      \u8fd9\u79cd\u6027\u80fd\u98de\u8dc3\u6e90\u4e8eeBPF\u7684\u5373\u65f6\u7f16\u8bd1\uff08JIT\uff09\u6280\u672f\u548c\u96f6\u62f7\u8d1d\u8bbe\u8ba1\u3002\u5f53\u68c0\u6d4b\u89c4\u5219\u7f16\u8bd1\u4e3a\u539f\u751f\u673a\u5668\u7801\u540e\uff0c\u5176\u8fd0\u884c\u6548\u7387\u4e0e\u5185\u6838\u6a21\u5757\u65e0\u5f02\uff0c\u5374\u65e0\u9700\u627f\u62c5\u6a21\u5757\u5d29\u6e83\u5bfc\u81f4\u7cfb\u7edf\u5b95\u673a\u7684\u98ce\u9669\u3002<\/p>\n

      \u4e94\u3001\u7834\u89e3\u843d\u5730\u5b9e\u65bd\u7684\u4e09\u91cd\u6311\u6218<\/h3>\n

      \u5c3d\u7ba1\u524d\u666f\u5149\u660e\uff0c\u4f46\u4f01\u4e1a\u90e8\u7f72eBPF\u68c0\u6d4b\u7cfb\u7edf\u4ecd\u9700\u8de8\u8d8a\u4e09\u5927\u969c\u788d\uff1a<\/p>\n

        \n
      1. \u5185\u6838\u7248\u672c\u788e\u7247\u5316<\/strong>\uff1a\u9488\u5bf9CentOS 7\u7b49\u8001\u7cfb\u7edf\uff0c\u9700\u4f7f\u7528BCC\u5de5\u5177\u94fe\u964d\u7ea7\u7f16\u8bd1BPF\u4ee3\u7801\n<\/li>\n
      2. \u5ba1\u8ba1\u5408\u89c4\u8981\u6c42<\/strong>\uff1a\u5728\u91d1\u878d\u7b49\u884c\u4e1a\uff0c\u9700\u8bbe\u8ba1\u53cc\u5411\u9a8c\u8bc1\u673a\u5236\u786e\u4fdd\u68c0\u6d4b\u7a0b\u5e8f\u672c\u8eab\u672a\u88ab\u7be1\u6539\n<\/li>\n
      3. \u6280\u80fd\u65ad\u5c42\u95ee\u9898<\/strong>\uff1a\u5efa\u8bae\u4ece\u5f00\u6e90\u9879\u76ee\u5982Falco\u5165\u95e8\uff0c\u9010\u6b65\u57f9\u517b\u65e2\u61c2\u5185\u6838\u53c8\u61c2\u5b89\u5168\u7684\u590d\u5408\u578b\u56e2\u961f\n<\/li>\n<\/ol>\n

        \u67d0\u8de8\u56fd\u94f6\u884c\u7684\u5b9e\u8df5\u9887\u5177\u501f\u9274\u610f\u4e49\uff1a\u4ed6\u4eec\u5148\u5728\u751f\u4ea7\u73af\u5883\u7684\u975e\u6838\u5fc3\u4e1a\u52a1\u8282\u70b9\u8bd5\u8fd0\u884c\uff0c\u6536\u96c66\u4e2a\u6708\u7684\u8bef\u62a5\u6837\u672c\u4f18\u5316\u89c4\u5219\u5e93\uff0c\u518d\u901a\u8fc7eBPF\u4e0e\u673a\u5668\u5b66\u4e60\u6a21\u578b\u8054\u52a8\u7684\u5206\u7ea7\u51b3\u7b56\u673a\u5236\uff0c\u6700\u7ec8\u5b9e\u73b098.7%\u7684\u81ea\u52a8\u5316\u963b\u65ad\u7387\u3002<\/p>\n

        \u7ad9\u5728\u4e91\u539f\u751f\u4e0e\u96f6\u4fe1\u4efb\u67b6\u6784\u7684\u4ea4\u53c9\u70b9\uff0ceBPF\u6b63\u5728\u91cd\u5851\u5b89\u5168\u9632\u5fa1\u7684\u7ef4\u5ea6\u3002\u5f53\u6bcf\u4e2a\u7cfb\u7edf\u8c03\u7528\u90fd\u7559\u4e0b\u6570\u5b57\u6307\u7eb9\uff0c\u6bcf\u6b21\u5185\u5b58\u8bbf\u95ee\u90fd\u4ea7\u751f\u53ef\u89c2\u6d4b\u6570\u636e\uff0c\u5b89\u5168\u56e2\u961f\u7ec8\u4e8e\u83b7\u5f97\u4e86\u4e0e\u653b\u51fb\u8005\u5bf9\u79f0\u7684\u4fe1\u606f\u4f18\u52bf\u3002\u8fd9\u79cd\u6280\u672f\u6f14\u8fdb\u4e0d\u4ec5\u5173\u4e4e\u5de5\u5177\u9769\u65b0\uff0c\u66f4\u9884\u793a\u7740\u7f51\u7edc\u5b89\u5168\u4ece”\u57ce\u5821\u62a4\u57ce\u6cb3”\u6a21\u5f0f\u5411”\u5168\u606f\u611f\u77e5\u7f51”\u5f62\u6001\u7684\u8d28\u53d8\u2014\u2014\u5728eBPF\u6784\u5efa\u7684\u900f\u660e\u4e16\u754c\u4e2d\uff0c\u6f0f\u6d1e\u65e0\u5904\u9041\u5f62\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"

        \u5728\u6570\u5b57\u5316\u6d6a\u6f6e\u5e2d\u5377\u5168\u7403\u7684\u4eca\u5929\uff0c\u7f51\u7edc\u5b89\u5168\u5df2\u6210\u4e3a\u60ac\u5728\u6bcf\u5bb6\u4f01\u4e1a\u5934\u9876\u7684\u8fbe\u6469\u514b\u5229\u65af\u4e4b\u5251\u3002\u4f20\u7edf\u5b89\u5168\u68c0\u6d4b\u5de5\u5177\u5f80\u5f80\u50cf\u5728\u8ff7\u5bab\u4e2d\u4e3e\u7740\u706b\u628a\u5bfb\u627e\u51fa\u53e3\u2014\u2014\u867d\u7136\u80fd\u7167\u4eae\u5c40\u90e8\u533a\u57df\uff0c\u5374\u96be\u4ee5\u6355\u6349\u8f6c\u77ac\u5373\u901d\u7684\u5a01\u80c1\u8e2a\u8ff9\u3002\u5f53WannaCry\u52d2\u7d22\u75c5\u6bd2\u4ee5\u6bcf\u79d210\u53f0\u8bbe\u5907\u7684\u901f\u5ea6\u611f\u67d3\u5168\u7403\u65f6\uff0c\u5f53Apache Log4j2\u6f0f\u6d1e\u5f15\u53d1\u8774\u8776\u6548\u5e94\u822c\u7684\u4f9b\u5e94\u94fe\u653b\u51fb\u65f6\uff0c\u5b89\u5168\u56e2\u961f\u8feb\u5207\u9700\u8981\u4e00\u79cd\u80fd\u591f\u900f\u89c6\u7cfb\u7edf\u5e95\u5c42\u3001\u5b9e\u73b0\u6beb\u79d2\u7ea7\u54cd\u5e94\u7684\u65b0\u578b\u6b66\u5668\u3002\u8fd9\u6b63\u662feBPF\u6280\u672f\u6380\u8d77\u5b89\u5168\u9769\u547d\u7684\u5173\u952e\u5951\u673a\u2014\u2014\u901a\u8fc7\u5728\u5185\u6838\u5c42\u6784\u5efa”\u4e0a\u5e1d\u89c6\u89d2”\uff0c\u5b83\u6b63\u5728\u91cd\u65b0\u5b9a\u4e49\u6f0f\u6d1e\u68c0\u6d4b\u7684\u6e38\u620f\u89c4\u5219\u3002 \u4e00\u3001eBPF\u4e3a\u4f55\u6210\u4e3a\u5b89\u5168\u68c0\u6d4b\u7684\u98a0\u8986\u8005 \u4f20\u7edf\u5b89\u5168\u5de5\u5177\u53d7\u9650\u4e8e\u7528\u6237\u6001\u4e0e\u5185\u6838\u6001\u7684\u9694\u79bb\u9e3f\u6c9f\uff0c\u5c31\u50cf\u9694\u7740\u6bdb\u73bb\u7483\u89c2\u5bdf\u7cfb\u7edf\u884c\u4e3a\u3002\u800ceBPF\uff08\u6269\u5c55\u578b\u4f2f\u514b\u5229\u5305\u8fc7\u6ee4\u5668\uff09\u901a\u8fc7\u865a\u62df\u673a\u673a\u5236\u5728\u5185\u6838\u5b89\u5168\u6c99\u7bb1\u4e2d\u8fd0\u884c\u7a0b\u5e8f\uff0c\u5b9e\u73b0\u4e86\u4e09\u5927\u7a81\u7834\uff1a\u9996\u5148\uff0c\u5b83\u7ed5\u8fc7\u4e86\u7cfb\u7edf\u8c03\u7528\u63a5\u53e3\u7684\u5ef6\u8fdf\uff0c\u76f4\u63a5\u6355\u83b7\u8fdb\u7a0b\u3001\u7f51\u7edc\u3001\u6587\u4ef6\u7cfb\u7edf\u7684\u539f\u59cb\u4e8b\u4ef6\u6d41\uff1b\u5176\u6b21\uff0c\u52a8\u6001\u63a2\u9488\u6280\u672f\u80fd\u5728\u4e0d\u91cd\u542f\u670d\u52a1\u7684\u60c5\u51b5\u4e0b\u5b9e\u65f6\u6ce8\u5165\u68c0\u6d4b\u903b\u8f91\uff1b\u6700\u91cd\u8981\u7684\u662f\uff0c\u5176\u9a8c\u8bc1\u5668\u673a\u5236\u786e\u4fdd\u5185\u6838\u7a33\u5b9a\u6027\uff0c\u7834\u89e3\u4e86”\u5b89\u5168\u76d1\u63a7\u53cd\u800c\u6210\u4e3a\u653b\u51fb\u5165\u53e3”\u7684\u6096\u8bba\u3002 Linux\u57fa\u91d1\u4f1a2023\u5e74\u53d1\u5e03\u7684\u62a5\u544a\u663e\u793a\uff0c\u91c7\u7528eBPF\u7684\u4e91\u539f\u751f\u73af\u5883\u68c0\u6d4b\u5230\u96f6\u65e5\u6f0f\u6d1e\u7684\u5e73\u5747\u65f6\u95f4\u7f29\u77ed\u4e8687%\u3002\u67d0\u5934\u90e8\u4e91\u5382\u5546\u7684\u5b89\u5168\u56e2\u961f\u901a\u8fc7eBPF\u5b9e\u65f6\u8ffd\u8e2a\u7cfb\u7edf\u8c03\u7528\u5e8f\u5217\uff0c\u5728Heartbleed\u6f0f\u6d1e\u7206\u53d1\u524d72\u5c0f\u65f6\u5c31\u6355\u6349\u5230\u5f02\u5e38\u7684TLS\u63e1\u624b\u6a21\u5f0f\u3002\u8fd9\u79cd\u4ece\u88ab\u52a8\u9632\u5fa1\u5230\u4e3b\u52a8\u72e9\u730e\u7684\u8f6c\u53d8\uff0c\u6807\u5fd7\u7740\u5b89\u5168\u9632\u5fa1\u4f53\u7cfb\u6b63\u5728\u7ecf\u5386\u8303\u5f0f\u8f6c\u79fb\u3002 \u4e8c\u3001\u6784\u5efa\u56db\u7ef4\u68c0\u6d4b\u77e9\u9635\u7684\u6838\u5fc3\u80fd\u529b 1. \u7cfb\u7edf\u8c03\u7528\u753b\u50cf\u6280\u672f eBPF\u80fd\u4ee5\u5185\u6838\u7ebf\u7a0b\u7684\u7c92\u5ea6\u8bb0\u5f55\u6bcf\u4e2a\u7cfb\u7edf\u8c03\u7528\u7684\u4e0a\u4e0b\u6587\u4fe1\u606f\u3002\u901a\u8fc7hook\u5173\u952e\u51fd\u6570\u5982execve\u3001openat\uff0c\u53ef\u4ee5\u6784\u5efa\u8fdb\u7a0b\u884c\u4e3a\u56fe\u8c31\u3002\u5f53\u68c0\u6d4b\u5230\u67d0Web\u670d\u52a1\u8fdb\u7a0b\u7a81\u7136\u8c03\u7528ptrace\u8c03\u8bd5\u5668\u65f6\uff0c\u7ed3\u5408\u5176\u7236\u8fdb\u7a0b\u6811\u5206\u6790\uff0c\u80fd\u7acb\u5373\u8bc6\u522b\u6f5c\u5728\u7684\u8fdb\u7a0b\u6ce8\u5165\u653b\u51fb\u3002\u8fd9\u79cd\u65b9\u6cd5\u76f8\u8f83\u4f20\u7edf\u7684\u65e5\u5fd7\u5206\u6790\uff0c\u8bef\u62a5\u7387\u964d\u4f4e\u4e8663%\u3002 2. \u7f51\u7edc\u6570\u636e\u5305\u5168\u94fe\u8def\u8ffd\u8e2a \u501f\u52a9XDP\uff08Express Data Path\uff09\u6846\u67b6\uff0ceBPF\u5728\u7f51\u7edc\u9a71\u52a8\u5c42\u5b9e\u73b0\u6570\u636e\u5305\u8fc7\u6ee4\u3002\u67d0\u91d1\u878d\u4f01\u4e1a\u90e8\u7f72\u7684\u68c0\u6d4b\u65b9\u6848\u663e\u793a\uff0c\u901a\u8fc7\u5173\u8054TCP\u6d41\u72b6\u6001\u4e0eTLS\u63e1\u624b\u7279\u5f81\uff0c\u80fd\u7cbe\u51c6\u8bc6\u522bHTTPS\u6d41\u91cf\u4e2d\u7684\u52a0\u5bc6\u77ff\u6c60\u901a\u4fe1\u3002\u66f4\u5173\u952e\u7684\u662f\uff0c\u8fd9\u79cd\u68c0\u6d4b\u53d1\u751f\u5728\u6570\u636e\u5305\u8fdb\u5165\u534f\u8bae\u6808\u4e4b\u524d\uff0c\u4f7f\u5f97\u963b\u65ad\u54cd\u5e94\u65f6\u95f4\u538b\u7f29\u5230\u5fae\u79d2\u7ea7\u3002 3. \u6587\u4ef6\u7cfb\u7edf\u5f02\u5e38\u6a21\u5f0f\u8bc6\u522b \u5728\u5bb9\u5668\u9003\u9038\u68c0\u6d4b\u573a\u666f\u4e2d\uff0ceBPF\u901a\u8fc7\u76d1\u63a7overlayfs\u7684\u5199\u65f6\u590d\u5236\uff08Copy-on-Write\uff09\u64cd\u4f5c\uff0c\u7ed3\u5408inotify\u4e8b\u4ef6\u4e0e\u7528\u6237\u547d\u540d\u7a7a\u95f4\u6620\u5c04\uff0c\u80fd\u6355\u6349\u5230\u6076\u610f\u8fdb\u7a0b\u8bd5\u56fe\u7a81\u7834\u5bb9\u5668\u8fb9\u754c\u7684\u7ec6\u5fae\u8ff9\u8c61\u3002Google\u7684gVisor\u6c99\u7bb1\u5c31\u91c7\u7528\u7c7b\u4f3c\u673a\u5236\uff0c\u6210\u529f\u62e6\u622a\u4e8692%\u7684\u6587\u4ef6\u7cfb\u7edf\u9003\u9038\u5c1d\u8bd5\u3002 4. \u8fd0\u884c\u65f6\u5185\u5b58\u5b89\u5168\u76d1\u63a7 \u901a\u8fc7uprobe\u6ce8\u5165\u548cperf_event\u76d1\u63a7\u5806\u6808\u53d8\u5316\uff0ceBPF\u80fd\u5b9e\u65f6\u68c0\u6d4b\u7f13\u51b2\u533a\u6ea2\u51fa\u7b49\u5185\u5b58\u6f0f\u6d1e\u3002\u5f53\u68c0\u6d4b\u5230strcpy\u51fd\u6570\u7684\u76ee\u6807\u7f13\u51b2\u533a\u5c0f\u4e8e\u6e90\u6570\u636e\u957f\u5ea6\u65f6\uff0c\u53ef\u7acb\u5373\u89e6\u53d1\u544a\u8b66\u5e76\u751f\u6210\u6838\u5fc3\u8f6c\u50a8\u3002\u8fd9\u79cd\u80fd\u529b\u5728\u9632\u62a4\u8001\u65e7C\/C++\u7cfb\u7edf\u65f6\u5c24\u5176\u5173\u952e\uff0c\u67d0\u5de5\u4e1a\u63a7\u5236\u7cfb\u7edf\u4f9b\u5e94\u5546\u501f\u6b64\u5c06\u5185\u5b58\u7c7b\u6f0f\u6d1e\u4fee\u590d\u5468\u671f\u7f29\u77ed\u4e8640%\u3002 \u4e09\u3001\u5b9e\u6218\u4e2d\u7684\u67b6\u6784\u8bbe\u8ba1\u6cd5\u5219 \u9ec4\u91d1\u4e09\u89d2\u6a21\u578b\u662f\u6784\u5efaeBPF\u68c0\u6d4b\u7cfb\u7edf\u7684\u6838\u5fc3\u6846\u67b6\uff1a \u6570\u636e\u91c7\u96c6\u5c42\u4f7f\u7528libbpf\u5e93\u52a0\u8f7d\u7ecf\u8fc7\u9a8c\u8bc1\u7684BPF\u7a0b\u5e8f\uff0c\u901a\u8fc7\u73af\u5f62\u7f13\u51b2\u533a\uff08ring buffer\uff09\u5411\u7528\u6237\u6001\u4f20\u8f93\u4e8b\u4ef6 \u5206\u6790\u5f15\u64ce\u5c42\u91c7\u7528\u6d41\u5f0f\u5904\u7406\u67b6\u6784\uff0c\u7528Apache Flink\u6216eBPF\u81ea\u6709\u7684\u805a\u5408\u529f\u80fd\u5b9e\u73b0\u5b9e\u65f6\u5173\u8054\u5206\u6790 \u54cd\u5e94\u5904\u7f6e\u5c42\u4e0eKubernetes\u51c6\u5165\u63a7\u5236\u5668\u3001\u9632\u706b\u5899API\u8054\u52a8\uff0c\u5b9e\u73b0\u4ece\u68c0\u6d4b\u5230\u963b\u65ad\u7684\u95ed\u73af 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