{"id":79223,"date":"2026-03-01T13:18:41","date_gmt":"2026-03-01T05:18:41","guid":{"rendered":"https:\/\/www.wsisp.com\/helps\/79223.html"},"modified":"2026-03-01T13:18:41","modified_gmt":"2026-03-01T05:18:41","slug":"ext-%e7%b3%bb%e5%88%97%e6%96%87%e4%bb%b6%e7%b3%bb%e7%bb%9f%e6%a0%b8%e5%bf%83%ef%bc%9a%e5%9d%97%e3%80%81%e5%88%86%e5%8c%ba%e3%80%81inode-%e4%b8%8e%e5%9d%97%e7%bb%84%e7%bb%93%e6%9e%84%e8%af%a6%e8%a7%a3","status":"publish","type":"post","link":"https:\/\/www.wsisp.com\/helps\/79223.html","title":{"rendered":"Ext \u7cfb\u5217\u6587\u4ef6\u7cfb\u7edf\u6838\u5fc3\uff1a\u5757\u3001\u5206\u533a\u3001inode \u4e0e\u5757\u7ec4\u7ed3\u6784\u8be6\u89e3"},"content":{"rendered":"

\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\"<\/p>\n

🔥\u8349\u8393\u718aLotso：\u4e2a\u4eba\u4e3b\u9875 <\/font><\/p>\n

\u2744\ufe0f\u4e2a\u4eba\u4e13\u680f: \u300aC++\u77e5\u8bc6\u5206\u4eab\u300b \u300aLinux \u5165\u95e8\u5230\u5b9e\u8df5：\u96f6\u57fa\u7840\u4e5f\u80fd\u61c2\u300b <\/font><\/p>\n

\u2728\u751f\u6d3b\u662f\u9ed8\u9ed8\u7684\u575a\u6301，\u6bc5\u529b\u662f\u6c38\u4e45\u7684\u4eab\u53d7！<\/font> <\/p>\n

\n

🎬 \u535a\u4e3b\u7b80\u4ecb：<\/font><\/p>\n

\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\"<\/p>\n

\n

\u6587\u7ae0\u76ee\u5f55<\/h4>\n
    \n
  • \u524d\u8a00：<\/li>\n
  • \u4e00. \u6587\u4ef6\u7cfb\u7edf\u7684\u6838\u5fc3\u94fa\u57ab：\u5757\u3001\u5206\u533a\u3001inode<\/li>\n
  • \n
      \n
    • 1.1 \u5757（Block）：\u6587\u4ef6\u5b58\u53d6\u7684\u6700\u5c0f\u5355\u4f4d<\/li>\n
    • 1.2 \u5206\u533a（Partition）：\u78c1\u76d8\u7684 \u201c\u903b\u8f91\u5207\u7247\u201d<\/li>\n
    • 1.3 inode：\u6587\u4ef6\u5c5e\u6027\u7684 \u201c\u8eab\u4efd\u8bc1\u201d<\/li>\n<\/ul>\n<\/li>\n
    • \u4e8c. Ext \u7cfb\u5217\u6587\u4ef6\u7cfb\u7edf\u6838\u5fc3：\u5757\u7ec4（Block Group）\u7ed3\u6784<\/li>\n
    • \n
        \n
      • 2.1 \u5757\u7ec4\u7684\u6574\u4f53\u7ed3\u6784<\/li>\n
      • 2.2 \u5757\u7ec4\u5185\u90e8\u6838\u5fc3\u6784\u6210（\u4ece\u7ba1\u7406\u5230\u6570\u636e\u7684\u5b8c\u6574\u94fe\u8def）<\/li>\n
      • \n
          \n
        • 2.2.1 \u8d85\u7ea7\u5757（Super Block）：\u6587\u4ef6\u7cfb\u7edf\u7684 \u201c\u603b\u914d\u7f6e\u6587\u4ef6\u201d<\/li>\n
        • 2.2.2 \u5757\u7ec4\u63cf\u8ff0\u7b26\u8868（GDT：Group Descriptor Table）<\/li>\n
        • 2.2.3 \u5757\u4f4d\u56fe（Block Bitmap）：\u5757\u7684 \u201c\u5360\u7528\u72b6\u6001\u8bb0\u5f55\u8868\u201d<\/li>\n
        • 2.2.4 inode \u4f4d\u56fe（Inode Bitmap）：inode \u7684 \u201c\u5360\u7528\u72b6\u6001\u8bb0\u5f55\u8868\u201d<\/li>\n
        • 2.2.5 inode \u8868（Inode Table）：inode \u7684 \u201c\u5b58\u50a8\u4ed3\u5e93\u201d<\/li>\n
        • 2.2.6 \u6570\u636e\u5757（Data Blocks）：\u6587\u4ef6\u5185\u5bb9\u7684 \u201c\u5b58\u50a8\u533a\u57df\u201d<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<\/li>\n
        • \u4e09. \u6587\u4ef6\u7cfb\u7edf\u7684\u6838\u5fc3\u5de5\u4f5c\u6d41\u7a0b：\u521b\u5efa\u4e00\u4e2a\u6587\u4ef6\u7684\u5e95\u5c42\u903b\u8f91（\u5176\u5b83\u7684\u5c31\u4e0d\u5c55\u793a\u4e86）<\/li>\n
        • \u7ed3\u5c3e：<\/li>\n<\/ul>\n
          \n

          \u524d\u8a00：<\/h2>\n

          \u5728\u4e0a\u4e00\u7bc7\u535a\u5ba2\u4e2d，\u6211\u4eec\u641e\u61c2\u4e86\u78c1\u76d8\u7684\u7269\u7406\u7ed3\u6784\u3001\u903b\u8f91\u62bd\u8c61\u548c\u5bfb\u5740\u65b9\u5f0f（CHS\/LBA），\u77e5\u9053\u4e86\u78c1\u76d8\u7684\u6700\u5c0f\u5b58\u50a8\u5355\u4f4d\u662f\u6247\u533a\u3002\u4f46\u6247\u533a\u4ec5 512 \u5b57\u8282，\u76f4\u63a5\u64cd\u4f5c\u6548\u7387\u6781\u4f4e，\u4e14\u6742\u4e71\u65e0\u7ae0\u7684\u6247\u533a\u65e0\u6cd5\u9ad8\u6548\u7ba1\u7406\u6587\u4ef6\u3002\u8fd9\u5c31\u9700\u8981 \u201c\u6587\u4ef6\u7cfb\u7edf\u201d \u767b\u573a \u2014\u2014 \u5b83\u5c31\u50cf\u78c1\u76d8\u7684 \u201c\u7ba1\u7406\u5458\u201d，\u901a\u8fc7\u5212\u5206\u5757\u3001\u5206\u533a\u3001inode \u7b49\u7ed3\u6784，\u5c06\u96f6\u6563\u7684\u6247\u533a\u7ec4\u7ec7\u6210\u6709\u5e8f\u7684\u5b58\u50a8\u4f53\u7cfb，\u8ba9\u6587\u4ef6\u7684\u521b\u5efa\u3001\u8bfb\u53d6\u3001\u4fee\u6539\u3001\u5220\u9664\u53d8\u5f97\u9ad8\u6548\u53ef\u63a7\u3002\u672c\u6587\u4ece \u201c\u5757\u201d\u201c\u5206\u533a\u201d\u201cinode\u201d \u7b49\u57fa\u7840\u6982\u5ff5\u5165\u624b，\u6df1\u5165\u5256\u6790 Ext2\/3\/4 \u6587\u4ef6\u7cfb\u7edf\u7684\u6838\u5fc3\u8bbe\u8ba1 \u2014\u2014 \u5757\u7ec4\u7ed3\u6784，\u5e2e\u4f60\u5f7b\u5e95\u641e\u61c2\u6587\u4ef6\u7cfb\u7edf\u662f\u5982\u4f55\u7ba1\u7406\u78c1\u76d8\u5b58\u50a8\u7684\u3002<\/p>\n

          \n

          \u4e00. \u6587\u4ef6\u7cfb\u7edf\u7684\u6838\u5fc3\u94fa\u57ab：\u5757\u3001\u5206\u533a\u3001inode<\/h2>\n

          \u5728\u8ba4\u8bc6 Ext \u7cfb\u5217\u6587\u4ef6\u7cfb\u7edf\u4e4b\u524d，\u5fc5\u987b\u5148\u638c\u63e1\u4e09\u4e2a\u6838\u5fc3\u524d\u7f6e\u6982\u5ff5，\u5b83\u4eec\u662f\u6587\u4ef6\u7cfb\u7edf\u8bbe\u8ba1\u7684\u57fa\u77f3\u3002<\/p>\n

          1.1 \u5757（Block）：\u6587\u4ef6\u5b58\u53d6\u7684\u6700\u5c0f\u5355\u4f4d<\/h3>\n

          \u5757\u7684\u5f15\u5165\u539f\u56e0： \u6247\u533a\u662f\u78c1\u76d8\u7684\u6700\u5c0f\u7269\u7406\u5b58\u50a8\u5355\u4f4d（512 \u5b57\u8282），\u4f46\u9891\u7e41\u64cd\u4f5c\u5355\u4e2a\u6247\u533a\u4f1a\u5bfc\u81f4\u7cfb\u7edf\u8c03\u7528\u8fc7\u591a（\u6bcf\u6b21 IO \u90fd\u8981\u5207\u6362\u5185\u6838\u6001），\u6548\u7387\u6781\u4f4e\u3002\u56e0\u6b64\u6587\u4ef6\u7cfb\u7edf\u5f15\u5165 \u201c\u5757\u201d \u7684\u6982\u5ff5，\u5c06\u8fde\u7eed\u7684\u591a\u4e2a\u6247\u533a\u6253\u5305\u6210\u4e00\u4e2a\u5757，\u4f5c\u4e3a\u6587\u4ef6\u5b58\u53d6\u7684\u6700\u5c0f\u5355\u4f4d\u3002 \u5757\u7684\u5173\u952e\u7279\u6027：<\/p>\n

            \n
          • \u5757\u5927\u5c0f\u7531\u683c\u5f0f\u5316\u65f6\u6307\u5b9a（\u5e38\u89c1 4KB=8 \u4e2a\u6247\u533a），\u4e00\u65e6\u786e\u5b9a\u4e0d\u53ef\u4fee\u6539；<\/li>\n
          • \u5757\u662f\u6587\u4ef6\u7cfb\u7edf\u5c42\u9762\u7684\u903b\u8f91\u6982\u5ff5，\u5c4f\u853d\u4e86\u6247\u533a\u7684\u7269\u7406\u7ec6\u8282；<\/li>\n
          • \u6587\u4ef6\u7684\u5185\u5bb9\u6570\u636e\u4f1a\u88ab\u5206\u5272\u6210\u82e5\u5e72\u4e2a\u5757\u5b58\u50a8（\u4e0d\u8db3\u4e00\u5757\u5219\u5360\u7528\u4e00\u5757）\u3002<\/li>\n<\/ul>\n

            \u9a8c\u8bc1\u5757\u5927\u5c0f： \u901a\u8fc7stat\u547d\u4ee4\u53ef\u67e5\u770b\u6587\u4ef6\u7684\u5757\u76f8\u5173\u4fe1\u606f：<\/p>\n

            \"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\"<\/p>\n

            \u8f93\u51fa\u5173\u952e\u4fe1\u606f\u89e3\u8bfb：<\/p>\n

              \n
            • Blocks: 8：\u6587\u4ef6\u5360\u7528 8 \u4e2a \u201c\u78c1\u76d8\u5757\u201d（\u4e0d\u540c\u7cfb\u7edf\u5757\u8ba1\u6570\u89c4\u5219\u53ef\u80fd\u4e0d\u540c）；<\/li>\n
            • IO Block: 4096：\u6587\u4ef6\u7cfb\u7edf\u7684\u5757\u5927\u5c0f\u4e3a 4KB（\u5373 8 \u4e2a\u6247\u533a）\u3002<\/li>\n<\/ul>\n

              \u6ce8\u610f：<\/p>\n

                \n
              • \u78c1\u76d8\u5c31\u662f\u2f00\u4e2a\u4e09\u7ef4\u6570\u7ec4，\u6211\u4eec\u628a\u5b83\u770b\u5f85\u6210\u4e3a\u2f00\u4e2a"\u2f00\u7ef4\u6570\u7ec4"，\u6570\u7ec4\u4e0b\u6807\u5c31\u662fLBA，\u6bcf\u4e2a\u5143\u7d20\u90fd\u662f\u6247\u533a<\/li>\n
              • \u6bcf\u4e2a\u6247\u533a\u90fd\u6709LBA，\u90a3\u4e488\u4e2a\u6247\u533a\u2f00\u4e2a\u5757，\u6bcf\u2f00\u4e2a\u5757\u7684\u5730\u5740\u6211\u4eec\u4e5f\u80fd\u7b97\u51fa\u6765\u3002<\/li>\n
              • \u77e5\u9053LBA：\u5757\u53f7 = LBA\/8<\/li>\n
              • \u77e5\u9053\u5757\u53f7：LAB=\u5757\u53f7*8 + n (n\u662f\u5757\u5185\u7b2c\u51e0\u4e2a\u6247\u533a) \"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\"<\/li>\n<\/ul>\n

                1.2 \u5206\u533a（Partition）：\u78c1\u76d8\u7684 \u201c\u903b\u8f91\u5207\u7247\u201d<\/h3>\n

                \u5206\u533a\u7684\u6838\u5fc3\u4f5c\u7528： \u4e00\u5757\u7269\u7406\u78c1\u76d8\u5bb9\u91cf\u53ef\u80fd\u5f88\u5927（\u5982 1TB），\u82e5\u5168\u76d8\u53ea\u88c5\u4e00\u4e2a\u6587\u4ef6\u7cfb\u7edf，\u4e00\u65e6\u635f\u574f\u4f1a\u5bfc\u81f4\u6240\u6709\u6570\u636e\u4e22\u5931\u3002\u5206\u533a\u5c31\u662f\u5c06\u78c1\u76d8\u6309\u67f1\u9762（\u78c1\u76d8\u7269\u7406\u7ed3\u6784\u7684\u6838\u5fc3）\u5206\u5272\u6210\u591a\u4e2a\u72ec\u7acb\u7684 \u201c\u903b\u8f91\u78c1\u76d8\u201d，\u6bcf\u4e2a\u5206\u533a\u53ef\u5355\u72ec\u683c\u5f0f\u5316\u3001\u6302\u8f7d\u4f7f\u7528，\u5b9e\u73b0\u6570\u636e\u9694\u79bb\u548c\u7075\u6d3b\u7ba1\u7406\u3002 \u5206\u533a\u7684\u672c\u8d28：<\/p>\n

                  \n
                • \u5206\u533a\u7684\u6700\u5c0f\u5355\u4f4d\u662f\u67f1\u9762，\u6bcf\u4e2a\u5206\u533a\u6709\u72ec\u7acb\u7684\u8d77\u59cb\u548c\u7ed3\u675f\u67f1\u9762；<\/li>\n
                • \u4ece\u903b\u8f91\u4e0a\u770b，\u5206\u533a\u5c31\u662f\u78c1\u76d8\u7684 \u201c\u5207\u7247\u201d，\u6bcf\u4e2a\u5207\u7247\u90fd\u662f\u4e00\u4e2a\u72ec\u7acb\u7684\u5b58\u50a8\u533a\u57df；<\/li>\n
                • Linux \u4e2d\u5206\u533a\u8bbe\u5907\u6587\u4ef6\u4ee5\/dev\/sda1\u3001\/dev\/vda1\u7b49\u5f62\u5f0f\u5b58\u5728（\u5982\/dev\/vda1\u8868\u793a\u7b2c\u4e00\u5757\u865a\u62df\u78c1\u76d8\u7684\u7b2c\u4e00\u4e2a\u5206\u533a）\u3002<\/li>\n<\/ul>\n

                  \u5b9e\u6218\u67e5\u770b\u5206\u533a\u4fe1\u606f： \u901a\u8fc7fdisk\u547d\u4ee4\u67e5\u770b\u7cfb\u7edf\u5206\u533a： \"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\"<\/p>\n

                    \n
                  • Start\/End：\u5206\u533a\u7684\u8d77\u59cb \/ \u7ed3\u675f\u6247\u533a\u53f7；<\/li>\n
                  • Blocks：\u5206\u533a\u603b\u5757\u6570（1 \u5757 = 1KB，\u6b64\u5904 41936658+ KB\u224840GB）；<\/li>\n
                  • System：\u5206\u533a\u7684\u6587\u4ef6\u7cfb\u7edf\u7c7b\u578b（83 \u5bf9\u5e94 Linux \u7cfb\u7edf）\u3002<\/li>\n<\/ul>\n

                    \u67f1\u9762\u662f\u5206\u533a\u7684\u6700\u5c0f\u5355\u4f4d，\u6211\u4eec\u53ef\u4ee5\u5229\u7528\u53c2\u8003\u67f1\u9762\u53f7\u7801\u7684\u65b9\u5f0f\u6765\u8fdb\u884c\u5206\u533a，\u5176\u672c\u8d28\u5c31\u662f\u8bbe\u7f6e\u6bcf\u4e2a\u533a\u7684\u8d77\u59cb\u67f1\u9762\u548c\u7ed3\u675f\u67f1\u9762\u53f7\u7801\u3002 \u6b64\u65f6\u6211\u4eec\u53ef\u4ee5\u5c06\u786c\u76d8\u4e0a\u7684\u67f1\u9762（\u5206\u533a）\u8fdb\u884c\u5e73\u94fa，\u5c06\u5176\u60f3\u8c61\u6210\u4e00\u4e2a\u5927\u7684\u5e73\u9762，\u5982\u4e0b\u56fe\u6240\u793a： \"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\" \"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\" \u5176\u5b9e\u5206\u533a\u8fd8\u53ef\u4ee5\u7ee7\u7eed\u5206\u4e3a\u4e00\u4e2a\u4e2a\u7ec4，\u8fd9\u4e2a\u6211\u4eec\u540e\u9762\u8fd8\u4f1a\u518d\u8bb2\u7684\u3002<\/p>\n

                    1.3 inode：\u6587\u4ef6\u5c5e\u6027\u7684 \u201c\u8eab\u4efd\u8bc1\u201d<\/h3>\n

                    inode \u7684\u6838\u5fc3\u4f5c\u7528： \u6587\u4ef6 = \u5c5e\u6027（\u5143\u6570\u636e）+ \u5185\u5bb9\u3002\u6587\u4ef6\u7684\u5185\u5bb9\u5b58\u50a8\u5728\u5757\u4e2d，\u800c\u6587\u4ef6\u7684\u5c5e\u6027（\u6240\u6709\u8005\u3001\u6743\u9650\u3001\u5927\u5c0f\u3001\u521b\u5efa\u65f6\u95f4\u3001\u5757\u6620\u5c04\u5173\u7cfb\u7b49）\u9700\u8981\u5355\u72ec\u5b58\u50a8 \u2014\u2014 \u8fd9\u5c31\u662f inode（\u7d22\u5f15\u8282\u70b9）\u7684\u804c\u8d23\u3002 inode \u7684\u5173\u952e\u7279\u6027：<\/p>\n

                      \n
                    • \u6bcf\u4e2a\u6587\u4ef6\u5bf9\u5e94\u552f\u4e00\u7684 inode，\u5305\u542b\u552f\u4e00\u7684 inode \u53f7；<\/li>\n
                    • inode \u5927\u5c0f\u56fa\u5b9a（\u5e38\u89c1 128 \u5b57\u8282\u6216 256 \u5b57\u8282），\u4e0e\u6587\u4ef6\u5185\u5bb9\u5927\u5c0f\u65e0\u5173；<\/li>\n
                    • \u6587\u4ef6\u540d\u4e0d\u5b58\u50a8\u5728 inode \u4e2d，\u800c\u662f\u5b58\u50a8\u5728\u76ee\u5f55\u7684\u5757\u6570\u636e\u4e2d（\u76ee\u5f55\u672c\u8d28\u4e5f\u662f\u6587\u4ef6，\u6211\u4eec\u4e4b\u540e\u518d\u6765\u8be6\u7ec6\u4e86\u89e3）；<\/li>\n
                    • inode \u4e2d\u6700\u6838\u5fc3\u7684\u5b57\u6bb5\u662fi_block[EXT2_N_BLOCKS]（15 \u4e2a\u6307\u9488），\u8bb0\u5f55\u6587\u4ef6\u5185\u5bb9\u6240\u5728\u7684\u5757\u7f16\u53f7\u3002<\/li>\n<\/ul>\n

                      inode \u7ed3\u6784\u6838\u5fc3\u5b57\u6bb5（Ext2 \u793a\u4f8b）：<\/p>\n

                      struct<\/span> ext2_inode<\/span> {<\/span>
                      \n __le16 i_mode;<\/span> \/\/ \u6587\u4ef6\u6743\u9650（\u59820644）<\/span>
                      \n __le16 i_uid;<\/span> \/\/ \u6240\u6709\u8005ID<\/span>
                      \n __le32 i_size;<\/span> \/\/ \u6587\u4ef6\u5927\u5c0f（\u5b57\u8282）<\/span>
                      \n __le32 i_atime;<\/span> \/\/ \u6700\u540e\u8bbf\u95ee\u65f6\u95f4<\/span>
                      \n __le32 i_mtime;<\/span> \/\/ \u6700\u540e\u4fee\u6539\u65f6\u95f4（\u5185\u5bb9）<\/span>
                      \n __le32 i_ctime;<\/span> \/\/ \u6700\u540e\u53d8\u66f4\u65f6\u95f4（\u5c5e\u6027）<\/span>
                      \n __le16 i_gid;<\/span> \/\/ \u6240\u5c5e\u7ec4ID<\/span>
                      \n __le16 i_links_count;<\/span> \/\/ \u786c\u94fe\u63a5\u6570<\/span>
                      \n __le32 i_blocks;<\/span> \/\/ \u5360\u7528\u5757\u6570<\/span>
                      \n __le32 i_block[<\/span>15<\/span>]<\/span>;<\/span> \/\/ \u5757\u6620\u5c04\u6307\u9488（12\u76f4\u63a5+1\u4e00\u7ea7\u95f4\u63a5+1\u4e8c\u7ea7\u95f4\u63a5+1\u4e09\u7ea7\u95f4\u63a5）<\/span>
                      \n}<\/span>;<\/span><\/p>\n

                      \u5b9e\u6218\u67e5\u770b inode \u4fe1\u606f： \u901a\u8fc7ls -li\u547d\u4ee4\u53ef\u67e5\u770b\u6587\u4ef6\u7684 inode \u53f7：<\/p>\n

                      \"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\" \u5f00\u5934\u7684\u53f7\u7801\u5c31\u662f\u8be5\u6587\u4ef6\u7684 inode \u53f7，\u901a\u8fc7 inode \u53f7\u53ef\u552f\u4e00\u5b9a\u4f4d\u6587\u4ef6\u3002<\/p>\n

                      \n

                      \u4e8c. Ext \u7cfb\u5217\u6587\u4ef6\u7cfb\u7edf\u6838\u5fc3：\u5757\u7ec4（Block Group）\u7ed3\u6784<\/h2>\n

                      Ext2\/3\/4 \u6587\u4ef6\u7cfb\u7edf\u7684\u6838\u5fc3\u8bbe\u8ba1\u662f \u201c\u5757\u7ec4\u201d\u2014\u2014 \u5c06\u4e00\u4e2a\u5206\u533a\u8fdb\u4e00\u6b65\u5212\u5206\u4e3a\u591a\u4e2a\u5927\u5c0f\u76f8\u7b49\u7684\u5757\u7ec4（\u7c7b\u4f3c \u201c\u5c0f\u533a\u5212\u5206\u201d），\u6bcf\u4e2a\u5757\u7ec4\u5305\u542b\u5b8c\u6574\u7684\u7ba1\u7406\u7ed3\u6784\u548c\u6570\u636e\u5b58\u50a8\u533a\u57df\u3002\u8fd9\u79cd\u8bbe\u8ba1\u7684\u4f18\u52bf\u662f：\u5206\u6563\u98ce\u9669（\u5355\u4e2a\u5757\u7ec4\u635f\u574f\u4e0d\u5f71\u54cd\u5168\u5c40）\u3001\u63d0\u5347\u6548\u7387（IO \u64cd\u4f5c\u96c6\u4e2d\u5728\u5355\u4e2a\u5757\u7ec4，\u51cf\u5c11\u78c1\u5934\u79fb\u52a8）\u3002<\/p>\n

                      2.1 \u5757\u7ec4\u7684\u6574\u4f53\u7ed3\u6784<\/h3>\n

                      \u4e00\u4e2a Ext2 \u5206\u533a\u7684\u7ed3\u6784\u5982\u4e0b（\u4ece\u78c1\u76d8\u8d77\u59cb\u4f4d\u7f6e\u5230\u672b\u5c3e）： \"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\"<\/p>\n

                        \n
                      • Boot Block：\u56fa\u5b9a 1KB，\u5b58\u50a8\u5206\u533a\u8868\u548c\u542f\u52a8\u4fe1\u606f，\u6587\u4ef6\u7cfb\u7edf\u4e0d\u53ef\u4fee\u6539；<\/li>\n
                      • \u6bcf\u4e2a Block Group \u7ed3\u6784\u5b8c\u5168\u76f8\u540c，\u5305\u542b：\u8d85\u7ea7\u5757\u3001\u5757\u7ec4\u63cf\u8ff0\u7b26\u8868\u3001\u5757\u4f4d\u56fe\u3001inode \u4f4d\u56fe\u3001inode \u8868\u3001\u6570\u636e\u5757\u3002<\/li>\n<\/ul>\n

                        2.2 \u5757\u7ec4\u5185\u90e8\u6838\u5fc3\u6784\u6210（\u4ece\u7ba1\u7406\u5230\u6570\u636e\u7684\u5b8c\u6574\u94fe\u8def）<\/h3>\n

                        \u6bcf\u4e2a\u5757\u7ec4\u5c31\u50cf\u4e00\u4e2a \u201c\u72ec\u7acb\u7684\u5c0f\u6587\u4ef6\u7cfb\u7edf\u201d，\u5185\u90e8\u7ed3\u6784\u5c42\u5c42\u9012\u8fdb，\u5404\u53f8\u5176\u804c：<\/p>\n

                          \n
                        • \u6211\u4eec\u5148\u6765\u770b\u770b\u6574\u4f53\u56fe\u793a\u89e3\u6790(\u5f88\u91cd\u8981)，\u518d\u7ee7\u7eed\u5f80\u4e0b\u770b \"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\" \"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\"<\/li>\n
                        • \u5173\u952e\u95ee\u9898\u89e3\u7b54(\u4e5f\u53ef\u4ee5\u5148\u770b\u4e0b\u9762\u7684\u518d\u8fd4\u56de\u8fc7\u6765\u7406\u89e3)： \"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\"<\/li>\n<\/ul>\n

                          2.2.1 \u8d85\u7ea7\u5757（Super Block）：\u6587\u4ef6\u7cfb\u7edf\u7684 \u201c\u603b\u914d\u7f6e\u6587\u4ef6\u201d<\/h4>\n
                            \n
                          • \u6838\u5fc3\u4f5c\u7528：\u5b58\u50a8\u6574\u4e2a\u5206\u533a\u7684\u6587\u4ef6\u7cfb\u7edf\u5168\u5c40\u4fe1\u606f，\u662f\u6587\u4ef6\u7cfb\u7edf\u7684 \u201c\u5927\u8111\u201d；<\/li>\n
                          • \u5173\u952e\u5b58\u50a8\u5185\u5bb9：\n
                              \n
                            • \u5757\u5927\u5c0f\u3001inode \u5927\u5c0f；<\/li>\n
                            • \u5757\u603b\u6570\u3001inode \u603b\u6570\u3001\u7a7a\u95f2\u5757\u6570\u3001\u7a7a\u95f2 inode \u6570；<\/li>\n
                            • \u6700\u8fd1\u6302\u8f7d\u65f6\u95f4\u3001\u6700\u8fd1\u5199\u5165\u65f6\u95f4\u3001\u6700\u8fd1\u78c1\u76d8\u68c0\u67e5\u65f6\u95f4；<\/li>\n
                            • \u9b54\u6570（s_magic，Ext2 \u9b54\u6570\u4e3a 0xEF53，\u7528\u4e8e\u8bc6\u522b\u6587\u4ef6\u7cfb\u7edf\u7c7b\u578b）；<\/li>\n<\/ul>\n<\/li>\n
                            • \u5197\u4f59\u8bbe\u8ba1：\u8d85\u7ea7\u5757\u4f1a\u5728\u591a\u4e2a\u5757\u7ec4\u4e2d\u5907\u4efd（Block Group 0 \u5fc5\u5b58），\u9632\u6b62\u5355\u70b9\u635f\u574f\u5bfc\u81f4\u6574\u4e2a\u6587\u4ef6\u7cfb\u7edf\u5d29\u6e83\u3002<\/li>\n
                            • \u90e8\u5206\u6e90\u7801(\u9009\u62e9\u6027\u7684\u770b)：<\/li>\n<\/ul>\n

                              \/*
                              \n * \u8d85\u7ea7\u5757\u7ed3\u6784
                              \n *\/<\/span>
                              \nstruct<\/span> ext2_super_block<\/span> {<\/span>
                              \n __le32 s_inodes_count;<\/span> \/* Inodes\u603b\u6570 *\/<\/span>
                              \n __le32 s_blocks_count;<\/span> \/* \u5757\u603b\u6570 *\/<\/span>
                              \n __le32 s_r_blocks_count;<\/span> \/* \u4fdd\u7559\u5757\u6570 *\/<\/span>
                              \n __le32 s_free_blocks_count;<\/span> \/* \u7a7a\u95f2\u5757\u6570 *\/<\/span>
                              \n __le32 s_free_inodes_count;<\/span> \/* \u7a7a\u95f2Inodes\u6570 *\/<\/span>
                              \n __le32 s_first_data_block;<\/span> \/* \u7b2c\u4e00\u4e2a\u6570\u636e\u5757 *\/<\/span>
                              \n __le32 s_log_block_size;<\/span> \/* \u5757\u5927\u5c0f（\u5bf9\u6570\u5f62\u5f0f） *\/<\/span>
                              \n __le32 s_log_frag_size;<\/span> \/* \u7247\u6bb5\u5927\u5c0f（\u5bf9\u6570\u5f62\u5f0f） *\/<\/span>
                              \n __le32 s_blocks_per_group;<\/span> \/* \u6bcf\u7ec4\u7684\u5757\u6570 *\/<\/span>
                              \n __le32 s_frags_per_group;<\/span> \/* \u6bcf\u7ec4\u7684\u7247\u6bb5\u6570 *\/<\/span>
                              \n __le32 s_inodes_per_group;<\/span> \/* \u6bcf\u7ec4\u7684Inodes\u6570 *\/<\/span>
                              \n __le32 s_mtime;<\/span> \/* \u6302\u8f7d\u65f6\u95f4 *\/<\/span>
                              \n __le32 s_wtime;<\/span> \/* \u5199\u5165\u65f6\u95f4 *\/<\/span>
                              \n __le16 s_mnt_count;<\/span> \/* \u6302\u8f7d\u6b21\u6570 *\/<\/span>
                              \n __le16 s_max_mnt_count;<\/span> \/* \u6700\u5927\u6302\u8f7d\u6b21\u6570 *\/<\/span>
                              \n __le16 s_magic;<\/span> \/* \u9b54\u6570\u7b7e\u540d（0xEF53） *\/<\/span>
                              \n __le16 s_state;<\/span> \/* \u6587\u4ef6\u7cfb\u7edf\u72b6\u6001 *\/<\/span>
                              \n __le16 s_errors;<\/span> \/* \u9519\u8bef\u68c0\u6d4b\u65f6\u7684\u884c\u4e3a *\/<\/span>
                              \n __le16 s_minor_rev_level;<\/span> \/* \u6b21\u4fee\u8ba2\u7ea7\u522b *\/<\/span>
                              \n __le32 s_lastcheck;<\/span> \/* \u4e0a\u6b21\u68c0\u67e5\u65f6\u95f4 *\/<\/span>
                              \n __le32 s_checkinterval;<\/span> \/* \u68c0\u67e5\u6700\u5927\u95f4\u9694\u65f6\u95f4 *\/<\/span>
                              \n __le32 s_creator_os;<\/span> \/* \u521b\u5efa\u64cd\u4f5c\u7cfb\u7edf *\/<\/span>
                              \n __le32 s_rev_level;<\/span> \/* \u4fee\u8ba2\u7ea7\u522b *\/<\/span>
                              \n __le16 s_def_resuid;<\/span> \/* \u4fdd\u7559\u5757\u7684\u9ed8\u8ba4\u7528\u6237ID *\/<\/span>
                              \n __le16 s_def_resgid;<\/span> \/* \u4fdd\u7559\u5757\u7684\u9ed8\u8ba4\u7ec4ID *\/<\/span><\/p>\n

                              \/*
                              \n * \u4ee5\u4e0b\u5b57\u6bb5\u4ec5\u7528\u4e8eEXT2_DYNAMIC_REV\u7248\u672c\u7684\u8d85\u7ea7\u5757
                              \n *
                              \n * \u6ce8\u610f：\u517c\u5bb9\u7279\u6027\u96c6\u4e0e\u4e0d\u517c\u5bb9\u7279\u6027\u96c6\u7684\u533a\u522b\u5728\u4e8e，
                              \n * \u5982\u679c\u4e0d\u517c\u5bb9\u7279\u6027\u96c6\u4e2d\u6709\u5185\u6838\u4e0d\u8ba4\u8bc6\u7684\u4f4d，\u5185\u6838\u5e94\u62d2\u7edd\u6302\u8f7d\u8be5\u6587\u4ef6\u7cfb\u7edf\u3002
                              \n *
                              \n * e2fsck\u7684\u8981\u6c42\u66f4\u4e25\u683c：\u5982\u679c\u5b83\u4e0d\u77e5\u9053\u517c\u5bb9\u6216\u4e0d\u517c\u5bb9\u7279\u6027\u96c6\u4e2d\u7684\u67d0\u4e2a\u7279\u6027，
                              \n * \u5b83\u5fc5\u987b\u4e2d\u6b62，\u5e76\u4e14\u4e0d\u5c1d\u8bd5\u4fee\u6539\u5b83\u4e0d\u7406\u89e3\u7684\u5185\u5bb9…
                              \n *\/<\/span>
                              \n __le32 s_first_ino;<\/span> \/* \u7b2c\u4e00\u4e2a\u975e\u4fdd\u7559inode\u7f16\u53f7 *\/<\/span>
                              \n __le16 s_inode_size;<\/span> \/* inode\u7ed3\u6784\u5927\u5c0f *\/<\/span>
                              \n __le16 s_block_group_nr;<\/span> \/* \u5f53\u524d\u8d85\u7ea7\u5757\u6240\u5728\u7684\u5757\u7ec4\u53f7 *\/<\/span>
                              \n __le32 s_feature_compat;<\/span> \/* \u517c\u5bb9\u7279\u6027\u96c6 *\/<\/span>
                              \n __le32 s_feature_incompat;<\/span> \/* \u4e0d\u517c\u5bb9\u7279\u6027\u96c6 *\/<\/span>
                              \n __le32 s_feature_ro_compat;<\/span> \/* \u53ea\u8bfb\u517c\u5bb9\u7279\u6027\u96c6 *\/<\/span>
                              \n __u8 s_uuid[<\/span>16<\/span>]<\/span>;<\/span> \/* 128\u4f4d\u5377UUID *\/<\/span>
                              \n char<\/span> s_volume_name[<\/span>16<\/span>]<\/span>;<\/span> \/* \u5377\u540d\u79f0 *\/<\/span>
                              \n char<\/span> s_last_mounted[<\/span>64<\/span>]<\/span>;<\/span> \/* \u4e0a\u6b21\u6302\u8f7d\u7684\u76ee\u5f55 *\/<\/span>
                              \n __le32 s_algorithm_usage_bitmap;<\/span> \/* \u538b\u7f29\u7b97\u6cd5\u4f7f\u7528\u4f4d\u56fe *\/<\/span><\/p>\n

                              \/*
                              \n * \u6027\u80fd\u63d0\u793a\u3002\u4ec5\u5f53EXT2_COMPAT_PREALLOC\u6807\u5fd7\u5f00\u542f\u65f6，
                              \n * \u76ee\u5f55\u9884\u5206\u914d\u624d\u4f1a\u751f\u6548\u3002
                              \n *\/<\/span>
                              \n __u8 s_prealloc_blocks;<\/span> \/* \u5c1d\u8bd5\u9884\u5206\u914d\u7684\u5757\u6570 *\/<\/span>
                              \n __u8 s_prealloc_dir_blocks;<\/span> \/* \u4e3a\u76ee\u5f55\u9884\u5206\u914d\u7684\u5757\u6570 *\/<\/span>
                              \n __u16 s_padding1;<\/span> \/* \u586b\u5145 *\/<\/span><\/p>\n

                              \/*
                              \n * \u65e5\u5fd7\u652f\u6301（\u5f53EXT3_FEATURE_COMPAT_HAS_JOURNAL\u8bbe\u7f6e\u65f6\u6709\u6548）
                              \n *\/<\/span>
                              \n __u8 s_journal_uuid[<\/span>16<\/span>]<\/span>;<\/span> \/* \u65e5\u5fd7\u8d85\u7ea7\u5757UUID *\/<\/span>
                              \n __u32 s_journal_inum;<\/span> \/* \u65e5\u5fd7\u6587\u4ef6\u7684inode\u7f16\u53f7 *\/<\/span>
                              \n __u32 s_journal_dev;<\/span> \/* \u65e5\u5fd7\u6587\u4ef6\u7684\u8bbe\u5907\u7f16\u53f7 *\/<\/span>
                              \n __u32 s_last_orphan;<\/span> \/* \u5f85\u5220\u9664inode\u5217\u8868\u7684\u8d77\u59cb *\/<\/span>
                              \n __u32 s_hash_seed[<\/span>4<\/span>]<\/span>;<\/span> \/* HTREE\u54c8\u5e0c\u79cd\u5b50 *\/<\/span>
                              \n __u8 s_def_hash_version;<\/span> \/* \u9ed8\u8ba4\u4f7f\u7528\u7684\u54c8\u5e0c\u7248\u672c *\/<\/span>
                              \n __u8 s_reserved_char_pad;<\/span> \/* \u4fdd\u7559\u5b57\u7b26\u586b\u5145 *\/<\/span>
                              \n __u16 s_reserved_word_pad;<\/span> \/* \u4fdd\u7559\u5b57\u586b\u5145 *\/<\/span>
                              \n __le32 s_default_mount_opts;<\/span> \/* \u9ed8\u8ba4\u6302\u8f7d\u9009\u9879 *\/<\/span>
                              \n __le32 s_first_meta_bg;<\/span> \/* \u7b2c\u4e00\u4e2a\u5143\u6570\u636e\u5757\u7ec4 *\/<\/span>
                              \n __u32 s_reserved[<\/span>190<\/span>]<\/span>;<\/span> \/* \u586b\u5145\u5230\u5757\u672b\u5c3e *\/<\/span>
                              \n}<\/span>;<\/span><\/p>\n

                              2.2.2 \u5757\u7ec4\u63cf\u8ff0\u7b26\u8868（GDT：Group Descriptor Table）<\/h4>\n
                                \n
                              • \u6838\u5fc3\u4f5c\u7528：\u6bcf\u4e2a\u5757\u7ec4\u5bf9\u5e94\u5176\u4e2d\u4e00\u4e2a\u63cf\u8ff0\u7b26，\u8bb0\u5f55\u8be5\u5757\u7ec4\u7684\u8be6\u7ec6\u5c5e\u6027\u4fe1\u606f；<\/li>\n
                              • \u5173\u952e\u5b58\u50a8\u5185\u5bb9：\n
                                  \n
                                • \u5757\u4f4d\u56fe\u7684\u5757\u7f16\u53f7（bg_block_bitmap）；<\/li>\n
                                • inode \u4f4d\u56fe\u7684\u5757\u7f16\u53f7（bg_inode_bitmap）；<\/li>\n
                                • inode \u8868\u7684\u8d77\u59cb\u5757\u7f16\u53f7（bg_inode_table）；<\/li>\n
                                • \u8be5\u5757\u7ec4\u7684\u7a7a\u95f2\u5757\u6570\u3001\u7a7a\u95f2 inode \u6570\u3001\u76ee\u5f55\u6570；<\/li>\n<\/ul>\n<\/li>\n
                                • \u5197\u4f59\u8bbe\u8ba1：\u4e0e\u8d85\u7ea7\u5757\u7c7b\u4f3c，GDT \u4e5f\u4f1a\u5728\u591a\u4e2a\u5757\u7ec4\u4e2d\u5907\u4efd<\/li>\n<\/ul>\n

                                  \u5757\u7ec40: | \u8d85\u7ea7\u5757 | GDT | \u5757\u4f4d\u56fe | inode\u4f4d\u56fe | inode\u8868 | \u6570\u636e\u5757 |
                                  \n\u5757\u7ec41: | \u8d85\u7ea7\u5757\u5907\u4efd | GDT\u5907\u4efd | \u5757\u4f4d\u56fe | inode\u4f4d\u56fe | inode\u8868 | \u6570\u636e\u5757 |
                                  \n\u5757\u7ec43: | \u8d85\u7ea7\u5757\u5907\u4efd | GDT\u5907\u4efd | \u5757\u4f4d\u56fe | inode\u4f4d\u56fe | inode\u8868 | \u6570\u636e\u5757 |
                                  \n\u5757\u7ec45: | \u8d85\u7ea7\u5757\u5907\u4efd | GDT\u5907\u4efd | \u5757\u4f4d\u56fe | inode\u4f4d\u56fe | inode\u8868 | \u6570\u636e\u5757 |
                                  \n\u5757\u7ec47: | \u8d85\u7ea7\u5757\u5907\u4efd | GDT\u5907\u4efd | \u5757\u4f4d\u56fe | inode\u4f4d\u56fe | inode\u8868 | \u6570\u636e\u5757 |
                                  \n…<\/p>\n

                                    \n
                                  • \u90e8\u5206\u6e90\u7801(\u9009\u62e9\u6027\u7684\u770b)：<\/li>\n<\/ul>\n

                                    \/*
                                    \n * \u5757\u7ec4\u63cf\u8ff0\u7b26\u7ed3\u6784（\u78c1\u76d8\u7ea7）
                                    \n *\/<\/span>
                                    \nstruct<\/span> ext2_group_desc<\/span> {<\/span>
                                    \n __le32 bg_block_bitmap;<\/span> \/* \u5757\u4f4d\u56fe\u6240\u5728\u5757\u53f7 *\/<\/span>
                                    \n __le32 bg_inode_bitmap;<\/span> \/* Inode\u4f4d\u56fe\u6240\u5728\u5757\u53f7 *\/<\/span>
                                    \n __le32 bg_inode_table;<\/span> \/* Inode\u8868\u8d77\u59cb\u5757\u53f7 *\/<\/span>
                                    \n __le16 bg_free_blocks_count;<\/span> \/* \u7a7a\u95f2\u5757\u6570\u91cf *\/<\/span>
                                    \n __le16 bg_free_inodes_count;<\/span> \/* \u7a7a\u95f2Inode\u6570\u91cf *\/<\/span>
                                    \n __le16 bg_used_dirs_count;<\/span> \/* \u76ee\u5f55\u6570\u91cf（\u5df2\u4f7f\u7528\u7684\u76ee\u5f55\u9879） *\/<\/span>
                                    \n __le16 bg_pad;<\/span> \/* \u586b\u5145\u5bf9\u9f50 *\/<\/span>
                                    \n __le32 bg_reserved[<\/span>3<\/span>]<\/span>;<\/span> \/* \u4fdd\u7559\u5b57\u6bb5 *\/<\/span>
                                    \n}<\/span>;<\/span><\/p>\n

                                      \n
                                    • \u8865\u5145\u8bf4\u660e：\n
                                        \n
                                      • \u6bcf\u4e2a\u5757\u7ec4\u5728GDT（\u7ec4\u63cf\u8ff0\u7b26\u8868）\u4e2d\u90fd\u6709\u4e00\u4e2a\u5bf9\u5e94\u7684ext2_group_desc\u7ed3\u6784<\/li>\n
                                      • \u8fd9\u4e2a\u7ed3\u6784\u63cf\u8ff0\u7684\u662f\u7279\u5b9a\u5757\u7ec4\u7684\u5143\u6570\u636e\u4f4d\u7f6e\u548c\u7edf\u8ba1\u4fe1\u606f<\/li>\n
                                      • \u6240\u6709\u5757\u7ec4\u7684\u63cf\u8ff0\u7b26\u6309\u987a\u5e8f\u7ec4\u6210GDT，\u5b58\u50a8\u5728\u591a\u4e2a\u4f4d\u7f6e\u8fdb\u884c\u5907\u4efd<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n

                                        2.2.3 \u5757\u4f4d\u56fe（Block Bitmap）：\u5757\u7684 \u201c\u5360\u7528\u72b6\u6001\u8bb0\u5f55\u8868\u201d<\/h4>\n
                                          \n
                                        • \u6838\u5fc3\u4f5c\u7528：\u7528\u4e00\u4e2a bit \u4f4d\u6807\u8bb0\u4e00\u4e2a\u5757\u7684\u72b6\u6001（0 = \u7a7a\u95f2，1 = \u5df2\u5360\u7528）；<\/li>\n
                                        • \u9ad8\u6548\u6027：\u67e5\u627e\u7a7a\u95f2\u5757\u65f6，\u53ea\u9700\u904d\u5386\u4f4d\u56fe\u4e2d\u7684 bit \u4f4d，\u65e0\u9700\u626b\u63cf\u6240\u6709\u5757；<\/li>\n
                                        • \u793a\u4f8b：\u82e5\u5757\u4f4d\u56fe\u7684\u7b2c 3 \u4e2a bit \u4e3a 1，\u8868\u793a\u8be5\u5757\u7ec4\u7684\u7b2c 3 \u4e2a\u5757\u5df2\u88ab\u5360\u7528\u3002<\/li>\n<\/ul>\n

                                          \u5b57\u82820: [bit7][bit6][bit5][bit4][bit3][bit2][bit1][bit0]
                                          \n \u7b2c8\u5757 \u7b2c7\u5757 \u7b2c6\u5757 \u7b2c5\u5757 \u7b2c4\u5757 \u7b2c3\u5757 \u7b2c2\u5757 \u7b2c1\u5757
                                          \n \u2191 \u2191 \u2191 \u2191 \u2191 \u2191 \u2191 \u2191
                                          \n \u6700\u9ad8\u4f4d \u2190——– \u5b57\u8282\u5185\u6bd4\u7279\u4f4d\u987a\u5e8f ——–\u2192 \u6700\u4f4e\u4f4d<\/p>\n

                                          2.2.4 inode \u4f4d\u56fe（Inode Bitmap）：inode \u7684 \u201c\u5360\u7528\u72b6\u6001\u8bb0\u5f55\u8868\u201d<\/h4>\n
                                            \n
                                          • \u6838\u5fc3\u4f5c\u7528：\u4e0e\u5757\u4f4d\u56fe\u903b\u8f91\u4e00\u81f4，\u7528\u4e00\u4e2a bit \u4f4d\u6807\u8bb0\u4e00\u4e2a inode \u7684\u72b6\u6001（0 = \u7a7a\u95f2，1 = \u5df2\u5360\u7528）；<\/li>\n
                                          • \u5173\u952e\u7279\u6027：inode \u7f16\u53f7\u662f\u5206\u533a\u7ea7\u5168\u5c40\u552f\u4e00\u7684，\u7531\u5757\u7ec4\u53f7 + \u5757\u7ec4\u5185 inode \u504f\u79fb\u91cf\u7ec4\u6210\u3002<\/li>\n<\/ul>\n

                                            2.2.5 inode \u8868（Inode Table）：inode \u7684 \u201c\u5b58\u50a8\u4ed3\u5e93\u201d<\/h4>\n
                                              \n
                                            • \u6838\u5fc3\u4f5c\u7528：\u8fde\u7eed\u7684\u5757\u7ec4\u6210 inode \u8868，\u6bcf\u4e2a\u5757\u5b58\u50a8\u591a\u4e2a inode（\u5982 4KB \u5757\u53ef\u5b58\u50a8 32 \u4e2a 128 \u5b57\u8282\u7684 inode）；<\/li>\n
                                            • \u5173\u952e\u7279\u6027：inode \u8868\u7684\u8d77\u59cb\u4f4d\u7f6e\u7531 GDT \u4e2d\u7684bg_inode_table\u6307\u5b9a，\u901a\u8fc7 inode \u53f7\u53ef\u5feb\u901f\u8ba1\u7b97\u51fa\u5176\u5728 inode \u8868\u4e2d\u7684\u4f4d\u7f6e\u3002<\/li>\n<\/ul>\n

                                              2.2.6 \u6570\u636e\u5757（Data Blocks）：\u6587\u4ef6\u5185\u5bb9\u7684 \u201c\u5b58\u50a8\u533a\u57df\u201d<\/h4>\n
                                                \n
                                              • \u6838\u5fc3\u4f5c\u7528：\u5b58\u50a8\u6587\u4ef6\u7684\u5185\u5bb9\u6570\u636e，\u662f\u5757\u7ec4\u4e2d\u6700\u5927\u7684\u533a\u57df；<\/li>\n
                                              • \u5b58\u50a8\u7c7b\u578b：\n
                                                  \n
                                                • \u666e\u901a\u6587\u4ef6：\u76f4\u63a5\u5b58\u50a8\u6587\u4ef6\u5185\u5bb9；<\/li>\n
                                                • \u76ee\u5f55\u6587\u4ef6：\u5b58\u50a8\u8be5\u76ee\u5f55\u4e0b\u7684 \u201c\u6587\u4ef6\u540d\u2192inode \u53f7\u201d \u6620\u5c04\u5173\u7cfb；<\/li>\n
                                                • \u94fe\u63a5\u6587\u4ef6：\u786c\u94fe\u63a5\u4ec5\u589e\u52a0 inode \u7684\u94fe\u63a5\u6570，\u8f6f\u94fe\u63a5\u5b58\u50a8\u76ee\u6807\u6587\u4ef6\u8def\u5f84\u3002<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n
                                                  \n

                                                  \u4e09. \u6587\u4ef6\u7cfb\u7edf\u7684\u6838\u5fc3\u5de5\u4f5c\u6d41\u7a0b：\u521b\u5efa\u4e00\u4e2a\u6587\u4ef6\u7684\u5e95\u5c42\u903b\u8f91（\u5176\u5b83\u7684\u5c31\u4e0d\u5c55\u793a\u4e86）<\/h2>\n

                                                  \u7ed3\u5408\u4e0a\u8ff0\u7ed3\u6784，\u6211\u4eec\u4ee5\u521b\u5efa\u4e00\u4e2a\u666e\u901a\u6587\u4ef6（touch test.txt）\u4e3a\u4f8b，\u770b\u770b\u6587\u4ef6\u7cfb\u7edf\u7684\u5e95\u5c42\u64cd\u4f5c\u6d41\u7a0b：<\/p>\n

                                                    \n
                                                  • \u67e5\u627e\u7a7a\u95f2 inode：\u904d\u5386 inode \u4f4d\u56fe，\u627e\u5230\u7b2c\u4e00\u4e2a\u503c\u4e3a 0 \u7684 bit \u4f4d，\u6807\u8bb0\u4e3a 1（\u5360\u7528），\u5206\u914d\u5bf9\u5e94\u7684 inode；<\/li>\n
                                                  • \u5199\u5165 inode \u5c5e\u6027：\u5c06\u6587\u4ef6\u7684\u5c5e\u6027（\u6240\u6709\u8005\u3001\u6743\u9650\u3001\u521b\u5efa\u65f6\u95f4\u7b49）\u5199\u5165 inode \u8868\u4e2d\u5bf9\u5e94\u7684 inode，i_block\u6570\u7ec4\u521d\u59cb\u5316\u4e3a 0；<\/li>\n
                                                  • \u67e5\u627e\u7a7a\u95f2\u5757：\u904d\u5386\u5757\u4f4d\u56fe，\u627e\u5230\u7a7a\u95f2\u5757，\u6807\u8bb0\u4e3a 1（\u5360\u7528），\u82e5\u6587\u4ef6\u6709\u5185\u5bb9\u5219\u5c06\u5185\u5bb9\u5199\u5165\u8be5\u5757，\u5e76\u66f4\u65b0 inode \u7684i_block\u6570\u7ec4（\u8bb0\u5f55\u5757\u7f16\u53f7）；<\/li>\n
                                                  • \u66f4\u65b0\u76ee\u5f55\u6570\u636e：\u5728\u5f53\u524d\u76ee\u5f55\u7684\u6570\u636e\u5757\u4e2d，\u6dfb\u52a0\u4e00\u6761 \u201c\u6587\u4ef6\u540d（test.txt）\u2192inode \u53f7\u201d \u7684\u6620\u5c04\u8bb0\u5f55\u3002<\/li>\n<\/ul>\n

                                                    \u6574\u4e2a\u8fc7\u7a0b\u4e2d，\u6587\u4ef6\u7cfb\u7edf\u901a\u8fc7\u5757\u4f4d\u56fe\u3001inode \u4f4d\u56fe\u5feb\u901f\u5b9a\u4f4d\u7a7a\u95f2\u8d44\u6e90，\u901a\u8fc7 inode \u5173\u8054\u6587\u4ef6\u5c5e\u6027\u4e0e\u5185\u5bb9，\u901a\u8fc7\u76ee\u5f55\u7ef4\u62a4\u6587\u4ef6\u540d\u4e0e inode \u7684\u6620\u5c04，\u9ad8\u6548\u5b8c\u6210\u6587\u4ef6\u521b\u5efa\u3002<\/p>\n

                                                    \u5b9e\u9645\u793a\u4f8b： \"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\" 4 \u4e2a\u6b65\u9aa4：<\/p>\n

                                                      \n
                                                    • \u5b58\u50a8\u5c5e\u6027 \u5185\u6838\u627e\u5230\u4e00\u4e2a\u7a7a\u95f2\u7684 i \u8282\u70b9（\u8fd9\u91cc\u662f 263466），\u5e76\u5c06\u6587\u4ef6\u5c5e\u6027（\u5982\u6743\u9650\u3001\u65f6\u95f4\u6233\u3001\u6240\u6709\u8005\u7b49）\u8bb0\u5f55\u5728\u5176\u4e2d\u3002<\/li>\n
                                                    • \u5b58\u50a8\u6570\u636e \u6587\u4ef6\u9700\u8981\u5b58\u50a8\u5728\u4e09\u4e2a\u78c1\u76d8\u5757\u4e2d\u3002\u5185\u6838\u627e\u5230\u7a7a\u95f2\u5757：300\u3001500\u3001800，\u5e76\u6309\u987a\u5e8f\u5c06\u7f13\u51b2\u533a\u6570\u636e\u590d\u5236\u5230\u8fd9\u4e9b\u5757\u4e2d\u3002<\/li>\n
                                                    • \u8bb0\u5f55\u5206\u914d\u60c5\u51b5 \u6587\u4ef6\u6570\u636e\u5757\u6309\u987a\u5e8f 300\u3001500\u3001800 \u5b58\u653e\u3002\u5185\u6838\u5728 i \u8282\u70b9\u7684\u78c1\u76d8\u5206\u5e03\u533a\u8bb0\u5f55\u8fd9\u4e2a\u5757\u5217\u8868\u3002<\/li>\n
                                                    • \u6dfb\u52a0\u6587\u4ef6\u540d\u5230\u76ee\u5f55 \u6587\u4ef6\u540d\u662f abc\u3002\u5185\u6838\u5728\u5f53\u524d\u76ee\u5f55\u7684\u76ee\u5f55\u6587\u4ef6\u4e2d\u6dfb\u52a0\u4e00\u4e2a\u6761\u76ee（\u5165\u53e3）： (i\u8282\u70b9\u53f7: 263466, \u6587\u4ef6\u540d: abc) \u8fd9\u4e2a\u6761\u76ee\u5efa\u7acb\u4e86\u6587\u4ef6\u540d\u4e0e\u6587\u4ef6\u5185\u5bb9\u548c\u5c5e\u6027\u4e4b\u95f4\u7684\u8fde\u63a5\u3002<\/li>\n<\/ul>\n

                                                      \u8865\u5145\u51e0\u4e2a\u6838\u5fc3\u6ce8\u610f\u4e8b\u9879：<\/p>\n

                                                        \n
                                                      • \u5757\u548c inode \u7684\u6570\u91cf\u5728\u683c\u5f0f\u5316\u65f6\u786e\u5b9a，\u82e5 inode \u8017\u5c3d（\u5982\u5927\u91cf\u5c0f\u6587\u4ef6），\u5373\u4f7f\u6709\u7a7a\u95f2\u5757\u4e5f\u65e0\u6cd5\u521b\u5efa\u65b0\u6587\u4ef6；<\/li>\n
                                                      • \u8d85\u7ea7\u5757\u548c GDT \u7684\u5197\u4f59\u5907\u4efd\u662f\u6587\u4ef6\u7cfb\u7edf\u7684 \u201c\u6551\u547d\u7a3b\u8349\u201d，\u82e5\u4e3b\u8d85\u7ea7\u5757\u635f\u574f，\u53ef\u901a\u8fc7\u5907\u4efd\u6062\u590d；<\/li>\n
                                                      • \u76ee\u5f55\u4e5f\u662f\u6587\u4ef6，\u5176\u5185\u5bb9\u662f \u201c\u6587\u4ef6\u540d\u2192inode \u53f7\u201d \u7684\u6620\u5c04，\u5220\u9664\u6587\u4ef6\u672c\u8d28\u662f\u5220\u9664\u76ee\u5f55\u4e2d\u7684\u8be5\u6620\u5c04，\u5e76\u5c06 inode \u548c\u5757\u6807\u8bb0\u4e3a\u7a7a\u95f2(\u5173\u4e8e\u8fd9\u4e2a\u95ee\u9898，\u6211\u4eec\u4e0b\u7bc7\u535a\u5ba2\u8fd8\u4f1a\u518d\u7ee7\u7eed\u8bb2\u7684)\u3002 \"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\"<\/li>\n<\/ul>\n
                                                        \n

                                                        \u7ed3\u5c3e：<\/h2>\n

                                                        🍓 \u6211\u662f\u8349\u8393\u718a Lotso！\u82e5\u8fd9\u7bc7\u6280\u672f\u5e72\u8d27\u5e2e\u4f60\u6253\u901a\u4e86\u5b66\u4e60\u4e2d\u7684\u5361\u70b9：
                                                        \n👀 \u3010\u5173\u6ce8\u3011\u8ddf\u6211\u4e00\u8d77\u6df1\u8015\u6280\u672f\u9886\u57df，\u4ece\u57fa\u7840\u5230\u8fdb\u9636，\u89c1\u8bc1\u6bcf\u4e00\u6b21\u6210\u957f
                                                        \n\u2764\ufe0f \u3010\u70b9\u8d5e\u3011\u8ba9\u4f18\u8d28\u5185\u5bb9\u88ab\u66f4\u591a\u4eba\u770b\u89c1，\u8ba9\u77e5\u8bc6\u4f20\u9012\u66f4\u6709\u529b\u91cf
                                                        \n\u2b50 \u3010\u6536\u85cf\u3011\u628a\u6838\u5fc3\u77e5\u8bc6\u70b9\u3001\u5b9e\u6218\u6280\u5de7\u5b58\u597d，\u9700\u8981\u65f6\u76f4\u63a5\u67e5\u3001\u968f\u65f6\u7528
                                                        \n💬 \u3010\u8bc4\u8bba\u3011\u5206\u4eab\u4f60\u7684\u7ecf\u9a8c\u6216\u7591\u95ee（\u6bd4\u5982\u66fe\u8e29\u8fc7\u7684\u6280\u672f\u5751？），\u4e00\u8d77\u4ea4\u6d41\u907f\u5751
                                                        \n🗳\ufe0f \u3010\u6295\u7968\u3011\u7528\u4f60\u7684\u9009\u62e9\u52a9\u529b\u793e\u533a\u5185\u5bb9\u65b9\u5411，\u544a\u8bc9\u5927\u5bb6\u54ea\u4e2a\u6280\u672f\u70b9\u6700\u8be5\u91cd\u70b9\u62c6\u89e3
                                                        \n\u6280\u672f\u4e4b\u8def\u96be\u514d\u6709\u56f0\u60d1，\u4f46\u540c\u884c\u7684\u4eba\u4f1a\u8ba9\u524d\u8fdb\u66f4\u6709\u65b9\u5411～\u613f\u6211\u4eec\u90fd\u80fd\u5728\u81ea\u5df1\u4e13\u6ce8\u7684\u9886\u57df\u91cc，\u4e00\u6b65\u6b65\u9760\u8fd1\u5fc3\u4e2d\u7684\u6280\u672f\u76ee\u6807！<\/p>\n

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                                                        \"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\"<\/p>\n","protected":false},"excerpt":{"rendered":"

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