{"id":37260,"date":"2025-04-18T11:06:03","date_gmt":"2025-04-18T03:06:03","guid":{"rendered":"https:\/\/www.yunshan.net\/blog\/?p=37260"},"modified":"2025-04-18T11:06:03","modified_gmt":"2025-04-18T03:06:03","slug":"%e4%bd%bf%e7%94%a8ebpf%e8%bf%9b%e8%a1%8c%e5%a4%8d%e6%9d%82%e4%ba%8b%e4%bb%b6%e5%a4%84%e7%90%86%e7%ad%96%e7%95%a5%ef%bc%9f","status":"publish","type":"post","link":"https:\/\/www.yunshan.net\/blog\/archives\/37260.html","title":{"rendered":"\u4f7f\u7528eBPF\u8fdb\u884c\u590d\u6742\u4e8b\u4ef6\u5904\u7406\u7b56\u7565\uff1f"},"content":{"rendered":"

\n

\"\u4f7f\u7528eBPF\u8fdb\u884c\u590d\u6742\u4e8b\u4ef6\u5904\u7406\u7b56\u7565\uff1f\"<\/p>\n<\/p>\n

\u5728\u6570\u636e\u6d2a\u6d41\u5e2d\u5377\u5168\u7403\u7684\u4eca\u5929\uff0c\u4f01\u4e1a\u6bcf\u79d2\u9700\u8981\u5904\u7406\u6570\u767e\u4e07\u4e2a\u79bb\u6563\u4e8b\u4ef6\u2014\u2014\u4ece\u7f51\u7edc\u6570\u636e\u5305\u5230\u5bb9\u5668\u65e5\u5fd7\uff0c\u4eceAPI\u8c03\u7528\u5230\u8bbe\u5907\u4f20\u611f\u5668\u4fe1\u53f7\u3002\u5982\u4f55\u5728\u8fd9\u4e9b\u6d77\u91cf\u6570\u636e\u4e2d\u5b9e\u65f6\u6355\u6349\u5173\u952e\u6a21\u5f0f<\/strong>\u5e76\u89e6\u53d1\u7cbe\u51c6\u54cd\u5e94\uff0c\u5df2\u7ecf\u6210\u4e3a\u6570\u5b57\u5316\u4e1a\u52a1\u7684\u6838\u5fc3\u7ade\u4e89\u529b\u3002\u4f20\u7edf\u7684\u4e8b\u4ef6\u5904\u7406\u67b6\u6784\u5f80\u5f80\u53d7\u9650\u4e8e\u7528\u6237\u6001\u4e0e\u5185\u6838\u6001\u7684\u9891\u7e41\u5207\u6362\uff0c\u5728\u6027\u80fd\u4e0e\u7075\u6d3b\u6027\u4e4b\u95f4\u987e\u6b64\u5931\u5f7c\u3002\u800ceBPF<\/a>\uff08Extended Berkeley Packet Filter\uff09<\/strong>\u6280\u672f\u7684\u51fa\u73b0\uff0c\u6b63\u5728\u4ee5\u5185\u6838\u7ea7\u53ef\u7f16\u7a0b<\/strong>\u7684\u7279\u6027\uff0c\u91cd\u65b0\u5b9a\u4e49\u590d\u6742\u4e8b\u4ef6\u5904\u7406\uff08CEP\uff09\u7684\u6280\u672f\u8fb9\u754c\u3002<\/p>\n

\n

\u4e00\u3001eBPF<\/a>\uff1a\u98a0\u8986\u4f20\u7edf\u89c2\u6d4b\u67b6\u6784\u7684\u9769\u547d\u6027\u6280\u672f<\/h3>\n

\u8d77\u6e90\u4e8eLinux\u5185\u6838\u7684eBPF\uff0c\u6700\u521d\u8bbe\u8ba1\u7528\u4e8e\u9ad8\u6548\u7f51\u7edc\u5305\u8fc7\u6ee4\uff0c\u4f46\u7ecf\u8fc7\u5341\u5e74\u6f14\u8fdb\u5df2\u53d1\u5c55\u6210\u901a\u7528\u578b\u5185\u6838\u6267\u884c\u73af\u5883<\/strong>\u3002\u5b83\u901a\u8fc7\u6c99\u76d2\u673a\u5236<\/strong>\u5728\u5185\u6838\u4e2d\u5b89\u5168\u8fd0\u884c\u7528\u6237\u5b9a\u4e49\u7684\u903b\u8f91\uff0c\u5b9e\u73b0\u4e86\u4e09\u5927\u7a81\u7834\uff1a<\/p>\n

    \n
  • \u96f6\u6027\u80fd\u635f\u8017<\/strong>\uff1a\u5728\u6570\u636e\u6e90\u5934\uff08\u5982\u7f51\u7edc\u9a71\u52a8\u5c42\uff09\u76f4\u63a5\u5904\u7406\u4e8b\u4ef6\uff0c\u907f\u514d\u6570\u636e\u590d\u5236\u5e26\u6765\u7684\u5ef6\u8fdf\n<\/li>\n
  • \u52a8\u6001\u53ef\u89c2\u6d4b<\/strong>\uff1a\u65e0\u9700\u91cd\u542f\u670d\u52a1\u6216\u4fee\u6539\u5e94\u7528\u4ee3\u7801\uff0c\u5b9e\u65f6\u6ce8\u5165\u76d1\u63a7\u903b\u8f91\n<\/li>\n
  • \u5168\u6808\u53ef\u89c1\u6027<\/strong>\uff1a\u8de8\u8d8a\u7cfb\u7edf\u8c03\u7528\u3001\u7f51\u7edc\u6808\u3001\u5e94\u7528\u8fd0\u884c\u65f6\u7b49\u591a\u5c42\u7ea7\u6355\u6349\u4e8b\u4ef6\n<\/li>\n<\/ul>\n

    \u8fd9\u79cd\u7279\u6027\u4f7f\u5f97eBPF\u6210\u4e3a\u5904\u7406\u65f6\u5e8f\u5173\u8054\u4e8b\u4ef6<\/strong>\u7684\u7406\u60f3\u8f7d\u4f53\u3002\u4f8b\u5982\uff0c\u5728\u5fae\u670d\u52a1\u67b6\u6784\u4e2d\uff0c\u5355\u4e2a\u7528\u6237\u8bf7\u6c42\u53ef\u80fd\u89e6\u53d1\u6570\u5341\u4e2a\u8de8\u670d\u52a1\u4e8b\u4ef6\uff0c\u4f20\u7edf\u65b9\u6848\u9700\u8981\u805a\u5408\u591a\u4e2a\u76d1\u63a7\u7cfb\u7edf\u7684\u6570\u636e\uff0c\u800ceBPF\u53ef\u76f4\u63a5\u5728\u5185\u6838\u5c42\u6784\u5efa\u7aef\u5230\u7aef\u4e8b\u52a1\u8ffd\u8e2a<\/strong>\u3002<\/p>\n

    \n

    \u4e8c\u3001\u590d\u6742\u4e8b\u4ef6\u5904\u7406\u7684\u4e09\u5927\u6280\u672f\u6311\u6218<\/h3>\n

    \u590d\u6742\u4e8b\u4ef6\u5904\u7406\uff08Complex Event Processing\uff09\u9700\u8981\u5b9e\u73b0\u6a21\u5f0f\u8bc6\u522b\u3001\u4e0a\u4e0b\u6587\u5173\u8054\u3001\u5b9e\u65f6\u54cd\u5e94<\/strong>\u7684\u95ed\u73af\uff0c\u4f20\u7edf\u65b9\u6848\u5e38\u9762\u4e34\u4e09\u91cd\u56f0\u5883\uff1a<\/p>\n

      \n
    1. \n

      \u6570\u636e\u91c7\u96c6\u74f6\u9888<\/strong>
      \n\u7528\u6237\u6001\u4ee3\u7406\uff08\u5982Logstash\uff09\u5728\u91c7\u96c6\u7f51\u7edc\u3001\u7cfb\u7edf\u8c03\u7528\u7b49\u4e8b\u4ef6\u65f6\uff0c\u9891\u7e41\u7684\u4e0a\u4e0b\u6587\u5207\u6362\u53ef\u80fd\u5bfc\u81f4\u9ad8\u8fbe30%\u7684\u6027\u80fd\u635f\u5931\u3002\u4e91\u539f\u751f\u73af\u5883\u4e2d\uff0c\u6bcf\u79d2\u767e\u4e07\u7ea7\u7684\u4e8b\u4ef6\u6d41\u53ef\u80fd\u76f4\u63a5\u538b\u57ae\u91c7\u96c6\u7ba1\u9053\u3002<\/p>\n<\/li>\n

    2. \n

      \u89c4\u5219\u5f15\u64ce\u5c40\u9650\u6027<\/strong>
      \n\u57fa\u4e8eSQL\u6216CEP\u4e13\u7528\u8bed\u8a00\uff08\u5982Esper EPL\uff09\u7684\u89c4\u5219\u5f15\u64ce\uff0c\u96be\u4ee5\u5904\u7406\u9700\u8981\u5185\u6838\u72b6\u6001\u611f\u77e5<\/strong>\u7684\u590d\u6742\u573a\u666f\u3002\u4f8b\u5982\uff0c\u68c0\u6d4b\u5206\u5e03\u5f0f\u62d2\u7edd\u670d\u52a1\u653b\u51fb\uff08DDoS\uff09\u9700\u8981\u540c\u65f6\u5206\u6790TCP\u63e1\u624b\u72b6\u6001\u3001\u5305\u901f\u7387\u3001\u8fde\u63a5\u62d3\u6251\u7b49\u591a\u7ef4\u7279\u5f81\u3002<\/p>\n<\/li>\n

    3. \n

      \u54cd\u5e94\u5ef6\u8fdf\u4e0d\u53ef\u63a7<\/strong>
      \n\u4ece\u4e8b\u4ef6\u4ea7\u751f\u5230\u89c4\u5219\u89e6\u53d1\u7684\u65f6\u95f4\u6296\u52a8\uff0c\u5728\u91d1\u878d\u4ea4\u6613\u3001\u5de5\u4e1a\u63a7\u5236\u7b49\u573a\u666f\u53ef\u80fd\u5bfc\u81f4\u707e\u96be\u6027\u540e\u679c\u3002\u4f20\u7edf\u67b6\u6784\u4e2d\u591a\u4e2a\u5c42\u7ea7\u7684\u4e8b\u4ef6\u4f20\u9012\u94fe\u6761\uff0c\u4f7f\u5f97\u7aef\u5230\u7aef\u5ef6\u8fdf\u96be\u4ee5\u538b\u7f29\u5230\u5fae\u79d2\u7ea7\u3002<\/p>\n<\/li>\n<\/ol>\n

      \n

      \u4e09\u3001eBPF\u9a71\u52a8\u7684CEP\u67b6\u6784\u521b\u65b0<\/h3>\n

      \u901a\u8fc7\u5c06\u4e8b\u4ef6\u5904\u7406\u903b\u8f91\u4e0b\u6c89\u5230\u5185\u6838\uff0ceBPF\u4e3a\u4e0a\u8ff0\u6311\u6218\u63d0\u4f9b\u4e86\u7a81\u7834\u6027\u89e3\u51b3\u65b9\u6848\uff1a<\/p>\n

      3.1 \u6570\u636e\u91c7\u96c6\u5c42\u4f18\u5316<\/strong><\/h4>\n
        \n
      • XDP\uff08eXpress Data Path\uff09<\/strong>\uff1a\u5728\u7f51\u7edc\u9a71\u52a8\u5c42\u76f4\u63a5\u5904\u7406\u6570\u636e\u5305\uff0c\u5b9e\u73b0\u7ebf\u901f\u8fc7\u6ee4<\/strong>\u3002\u4f8b\u5982\uff0c\u4ec5\u6355\u83b7\u7b26\u5408\u7279\u5b9a\u7279\u5f81\uff08\u5982\u5f02\u5e38HTTP\u5934\uff09\u7684\u6d41\u91cf\uff0c\u5c06\u6570\u636e\u91c7\u96c6\u5f00\u9500\u964d\u4f4e90%\n<\/li>\n
      • \u5185\u6838\u6001\u805a\u5408<\/strong>\uff1a\u5229\u7528eBPF Map\u7ed3\u6784\u5728\u6570\u636e\u6e90\u4fa7\u5b8c\u6210\u521d\u6b65\u7edf\u8ba1\u3002\u7edf\u8ba1TCP\u91cd\u4f20\u7387\u65f6\uff0c\u65e0\u9700\u5c06\u6bcf\u4e2a\u6570\u636e\u5305\u4e0a\u62a5\u7528\u6237\u6001\n<\/li>\n<\/ul>\n

        3.2 \u89c4\u5219\u6267\u884c\u5f15\u64ce\u5f3a\u5316<\/strong><\/h4>\n
          \n
        • \u72b6\u6001\u611f\u77e5\u8ba1\u7b97<\/strong>\uff1a\u5728\u5185\u6838\u7ef4\u62a4\u8de8\u4e8b\u4ef6\u7684\u4e0a\u4e0b\u6587\u72b6\u6001\u3002\u68c0\u6d4b\u7aef\u53e3\u626b\u63cf\u653b\u51fb\u65f6\uff0c\u53ef\u5b9e\u65f6\u8ddf\u8e2a\u4e0d\u540cIP\u7684\u8fde\u63a5\u5c1d\u8bd5\u8ba1\u6570\n<\/li>\n
        • \u591a\u7ef4\u5173\u8054\u5206\u6790<\/strong>\uff1a\u901a\u8fc7\u7ec4\u5408\u591a\u4e2aeBPF\u7a0b\u5e8f\uff0c\u540c\u65f6\u89c2\u6d4b\u7cfb\u7edf\u8c03\u7528\u3001\u7f51\u7edc\u6d41\u91cf\u3001\u8fdb\u7a0b\u884c\u4e3a\u7b49\u6570\u636e\u6e90\u3002\u8bc6\u522b\u52a0\u5bc6\u8d27\u5e01\u6316\u77ff\u653b\u51fb\u65f6\uff0c\u53ef\u5173\u8054GPU\u4f7f\u7528\u6fc0\u589e\u4e0e\u5f02\u5e38\u5916\u8054\u6d41\u91cf\n<\/li>\n<\/ul>\n
          \/\/ \u793a\u4f8b\uff1aeBPF\u7a0b\u5e8f\u68c0\u6d4b\u5f02\u5e38\u8fdb\u7a0b\u521b\u5efa  \r\nSEC("tracepoint\/syscalls\/sys_enter_execve")  \r\nint handle_execve(struct trace_event_raw_sys_enter* ctx) {  \r\nchar comm[TASK_COMM_LEN];  \r\nbpf_get_current_comm(&comm, sizeof(comm));  \r\nif (comm[0] == 'm' && comm[1] == 'i' && comm[2] == 'n' && comm[3] == 'e') {  \r\nbpf_override_return(ctx, -EPERM); \/\/ \u62e6\u622a\u53ef\u7591\u8fdb\u7a0b  \r\n}  \r\nreturn 0;  \r\n}  \r\n<\/code><\/pre>\n
          3.3 \u52a8\u6001\u7b56\u7565\u52a0\u8f7d\u673a\u5236<\/strong><\/h4>\n
            \n
          • \u539f\u5b50\u6027\u66f4\u65b0<\/strong>\uff1a\u901a\u8fc7BPF_PROG_LOAD\u548cBPF_PROG_ATTACH\u547d\u4ee4\uff0c\u65e0\u9700\u670d\u52a1\u4e2d\u65ad\u5373\u53ef\u5207\u6362\u68c0\u6d4b\u89c4\u5219\n<\/li>\n
          • \u6761\u4ef6\u89e6\u53d1<\/strong>\uff1a\u7ed3\u5408Kubernetes\u7b49\u7f16\u6392\u7cfb\u7edf\uff0c\u5f53\u96c6\u7fa4\u6269\u5bb9\u65f6\u81ea\u52a8\u52a0\u8f7d\u65b0\u7684\u6d41\u91cf\u63a7\u5236\u7b56\u7565\n<\/li>\n<\/ul>\n
            \n
            \u56db\u3001\u5b9e\u8df5\u573a\u666f\uff1a\u4ece\u7406\u8bba\u5230\u843d\u5730<\/h3>\n
            4.1 \u4e91\u539f\u751f\u5b89\u5168\u9632\u62a4<\/h4>\n
            \u5728\u670d\u52a1\u7f51\u683c\u4e2d\u90e8\u7f72eBPF\u7a0b\u5e8f\uff0c\u53ef\u5b9e\u65f6\u68c0\u6d4b\u6a2a\u5411\u79fb\u52a8\u653b\u51fb<\/strong>\uff1a<\/p>\n
              \n
            1. \u901a\u8fc7sock_ops\u7a0b\u5e8f\u76d1\u63a7Pod\u95f4\u901a\u4fe1\n<\/li>\n
            2. \u5f53\u67d0\u4e2a\u670d\u52a1\u7a81\u7136\u8bbf\u95ee\u6570\u636e\u5e93\u7ba1\u63a7\u7aef\u53e3\u65f6\u89e6\u53d1\u544a\u8b66\n<\/li>\n
            3. \u81ea\u52a8\u751f\u6210iptables\u89c4\u5219\u9694\u79bb\u53d7\u635f\u8282\u70b9\n<\/li>\n<\/ol>\n
              4.2<\/h4>\n","protected":false},"excerpt":{"rendered":"
              \u5728\u6570\u636e\u6d2a\u6d41\u5e2d\u5377\u5168\u7403\u7684\u4eca\u5929\uff0c\u4f01\u4e1a\u6bcf\u79d2\u9700\u8981\u5904\u7406\u6570\u767e\u4e07\u4e2a\u79bb\u6563\u4e8b\u4ef6\u2014\u2014\u4ece\u7f51\u7edc\u6570\u636e\u5305\u5230\u5bb9\u5668\u65e5\u5fd7\uff0c\u4eceAPI\u8c03\u7528\u5230\u8bbe\u5907\u4f20\u611f\u5668\u4fe1\u53f7\u3002\u5982\u4f55\u5728\u8fd9\u4e9b\u6d77\u91cf\u6570\u636e\u4e2d\u5b9e\u65f6\u6355\u6349\u5173\u952e\u6a21\u5f0f\u5e76\u89e6\u53d1\u7cbe\u51c6\u54cd\u5e94\uff0c\u5df2\u7ecf\u6210\u4e3a\u6570\u5b57\u5316\u4e1a\u52a1\u7684\u6838\u5fc3\u7ade\u4e89\u529b\u3002\u4f20\u7edf\u7684\u4e8b\u4ef6\u5904\u7406\u67b6\u6784\u5f80\u5f80\u53d7\u9650\u4e8e\u7528\u6237\u6001\u4e0e\u5185\u6838\u6001\u7684\u9891\u7e41\u5207\u6362\uff0c\u5728\u6027\u80fd\u4e0e\u7075\u6d3b\u6027\u4e4b\u95f4\u987e\u6b64\u5931\u5f7c\u3002\u800ceBPF\uff08Extended Berkeley Packet Filter\uff09\u6280\u672f\u7684\u51fa\u73b0\uff0c\u6b63\u5728\u4ee5\u5185\u6838\u7ea7\u53ef\u7f16\u7a0b\u7684\u7279\u6027\uff0c\u91cd\u65b0\u5b9a\u4e49\u590d\u6742\u4e8b\u4ef6\u5904\u7406\uff08CEP\uff09\u7684\u6280\u672f\u8fb9\u754c\u3002 \u4e00\u3001eBPF\uff1a\u98a0\u8986\u4f20\u7edf\u89c2\u6d4b\u67b6\u6784\u7684\u9769\u547d\u6027\u6280\u672f \u8d77\u6e90\u4e8eLinux\u5185\u6838\u7684eBPF\uff0c\u6700\u521d\u8bbe\u8ba1\u7528\u4e8e\u9ad8\u6548\u7f51\u7edc\u5305\u8fc7\u6ee4\uff0c\u4f46\u7ecf\u8fc7\u5341\u5e74\u6f14\u8fdb\u5df2\u53d1\u5c55\u6210\u901a\u7528\u578b\u5185\u6838\u6267\u884c\u73af\u5883\u3002\u5b83\u901a\u8fc7\u6c99\u76d2\u673a\u5236\u5728\u5185\u6838\u4e2d\u5b89\u5168\u8fd0\u884c\u7528\u6237\u5b9a\u4e49\u7684\u903b\u8f91\uff0c\u5b9e\u73b0\u4e86\u4e09\u5927\u7a81\u7834\uff1a 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