{"id":4470,"date":"2015-01-04T13:44:23","date_gmt":"2015-01-04T05:44:23","guid":{"rendered":"http:\/\/edsionte.com\/techblog\/?p=4470"},"modified":"2015-09-07T20:42:11","modified_gmt":"2015-09-07T12:42:11","slug":"open%e5%9c%a8linux%e5%86%85%e6%a0%b8%e7%9a%84%e5%ae%9e%e7%8e%b01-%e5%87%86%e5%a4%87%e5%b7%a5%e4%bd%9c","status":"publish","type":"post","link":"http:\/\/edsionte.com\/techblog\/archives\/4470","title":{"rendered":"open()\u5728Linux\u5185\u6838\u7684\u5b9e\u73b0-\u51c6\u5907\u5de5\u4f5c"},"content":{"rendered":"

1.\u57fa\u672c\u8bf4\u660e<\/h2>\n

\u201copen()\u5728Linux\u5185\u6838\u7684\u5b9e\u73b0\u201d<\/strong>\u7cfb\u5217\u6587\u7ae0\u5c06\u5206\u6790open\u7cfb\u7edf\u8c03\u7528\u5728Linux\u5185\u6838\u4e2d\u7684\u5b9e\u73b0\u8fc7\u7a0b\u3002\u672c\u7cfb\u5217\u6587\u7ae0\u5206\u4e3a\u516d\u7bc7\uff0c\u6bcf\u7bc7\u6587\u7ae0\u90fd\u63cf\u8ff0 open()\u5b9e\u73b0\u7684\u4e00\u90e8\u5206\u5185\u5bb9\uff0c\u4e0e\u524d\u540e\u7684\u7cfb\u5217\u6587\u7ae0\u4fdd\u6301\u76f8\u5bf9\u72ec\u7acb\u3002\u672c\u6587\u5c5e\u4e8e\u524d\u5e8f\u6587\u7ae0\uff0c\u96c6\u4e2d\u8bf4\u660e\u540e\u7eed\u6587\u7ae0\u6d89\u53ca\u5230\u7684\u57fa\u672c\u539f\u7406\u548c\u57fa\u672c\u6570\u636e\u7ed3\u6784\uff0c\u5e76\u4e14\u5bf9\u6574\u4e2a\u5206\u6790\u8fc7\u7a0b\u8fdb\u884cQ&A\u3002<\/p>\n

\u672c\u7cfb\u5217\u6587\u7ae0\u53c2\u8003Linux\u5185\u6838\u6e90\u7801\u7248\u672c\u4e3a3.2.69\u3002<\/p>\n

2.\u6570\u636e\u7ed3\u6784<\/h2>\n

dentry\u7ed3\u6784<\/strong><\/p>\n

\u5bf9\u4e8e\u6253\u5f00\u6587\u4ef6\u8fd9\u4e2a\u64cd\u4f5c\u6765\u8bf4\uff0c\u5b83\u662f\u901a\u8fc7\u8def\u5f84\u540d\u67e5\u627e\u5bf9\u5e94\u6587\u4ef6inode\u7684\u8fc7\u7a0b\uff0c\u8fd9\u91cc\u7528\u6237\u76f4\u9762\u7684\u662f\u6587\u4ef6\u8def\u5f84\uff0c\u800c\u5185\u6838\u5173\u6ce8\u7684inode\u3002\u5728\u6587\u4ef6\u8def\u5f84\u548cinode\u4e4b\u95f4\u901a\u8fc7\u76ee\u5f55\u9879\uff08dentry\uff09\u7f13\u5b58\u8fdb\u884c\u5173\u8054\uff0cdentry\u7f13\u5b58\u52a0\u5feb\u4e86vfs\u5bf9\u6587\u4ef6\u7684\u67e5\u627e\u3002\u6240\u6709\u7684\u76ee\u5f55\u9879\u901a\u8fc7\u6563\u5217\u8868\u8fdb\u884c\u7ec4\u7ec7\uff0c\u8fd9\u6837\u53ef\u4ee5\u5feb\u901f\u5bf9dentry\u8fdb\u884c\u67e5\u627e\uff1b\u6b64\u5916\uff0c\u5185\u6838\u5c06\u5e38\u7528\u7684dentry\u901a\u8fc7LRU\u7b97\u6cd5\u8fdb\u884c\u7ec4\u7ec7\uff0c\u8fd9\u6837\u53ef\u4ee5\u5feb\u901f\u67e5\u5230\u6700\u8fd1\u4e00\u6bb5\u65f6\u95f4\u7ecf\u5e38\u4f7f\u7528\u7684dentry\u3002<\/p>\n

\u4e0b\u9762\u5c06\u5bf9dentry\u4e2d\u7684\u90e8\u5206\u5b57\u6bb5\u8fdb\u884c\u8bf4\u660e\u3002<\/p>\n

d_inode\uff1a\u8be5\u5b57\u6bb5\u6307\u5411\u76ee\u5f55\u9879\u6240\u5173\u8054\u7684\u6587\u4ef6\u3002\u5982\u679c\u8be5\u5b57\u6bb5\u4e3a\u7a7a\uff0c\u5219\u8bf4\u660e\u5f53\u524d\u76ee\u5f55\u9879\u6307\u5411\u7684\u662f\u4e00\u4e2a\u5e76\u4e0d\u5b58\u5728\u7684\u6587\u4ef6\u3002<\/p>\n

d_name:\u8be5\u5b57\u6bb5\u8868\u793a\u76ee\u5f55\u9879\u540d\u79f0\uff08\u5e76\u4e0d\u662f\u6574\u4e2a\u8def\u5f84\u540d\uff09\uff0c\u4f46\u5b83\u5e76\u4e0d\u662f\u5355\u7eaf\u7684\u5b57\u7b26\u4e32\uff0c\u800c\u662f\u5c06\u5b57\u7b26\u4e32\u6587\u4ef6\u540d\u3001\u5b57\u7b26\u4e32\u957f\u5ea6\u548c\u6563\u5217\u503c\u5c01\u88c5\u6210qstr\uff08quick string\uff09\u7ed3\u6784\uff0c\u8fd9\u6837\u53ef\u4ee5\u52a0\u901f\u76ee\u5f55\u9879\u7684\u67e5\u627e\u5de5\u4f5c\uff1b<\/p>\n

d_iname\uff1a\u5f53\u76ee\u5f55\u9879\u540d\u79f0\u957f\u5ea6\u5c0f\u4e8eDNAME_INLINE_LEN\u65f6\uff0c\u5219\u8be5\u5b57\u7b26\u4e32\u540d\u79f0\u5219\u76f4\u63a5\u901a\u8fc7\u8be5\u5b57\u6bb5\u8fdb\u884c\u5b58\u50a8\uff1b<\/p>\n

d_parent\uff1a\u4e00\u4e2a\u8def\u5f84\u4e2d\u7684\u76ee\u5f55\u9879\u5f62\u6210\u5c42\u7ea7\u7ed3\u6784\u3002\u8be5\u5b57\u6bb5\u6307\u5411\u5f53\u524d\u76ee\u5f55\u9879\u7684\u7236\u76ee\u5f55dentry\u5b9e\u4f8b\uff1b\u7279\u522b\u7684\uff0c\u5bf9\u4e8e\u6839\u76ee\u5f55\u9879\u6765\u8bf4\uff0c\u8fd9\u4e2a\u5b57\u6bb5\u6307\u5411\u81ea\u5df1\uff1b<\/p>\n

d_subdirs\uff1a\u5f53\u524d\u76ee\u5f55\u9879\u5982\u679c\u4ee3\u8868\u76ee\u5f55\uff0c\u5219\u8be5\u76ee\u5f55\u4e0b\u7684\u6240\u6709\u6587\u4ef6\u5bf9\u5e94\u7684dentry\u5c06\u5f62\u6210d_subdirs\u94fe\u8868\uff08\u8868\u5934\uff09\uff1b<\/p>\n

d_child\uff1a\u8fd9\u4e2a\u5b57\u6bb5\u662f\u7236\u76ee\u5f55dentry\u4e2dd_subdirs\u94fe\u8868\u4e2d\u7684\u7ed3\u70b9\uff1b<\/p>\n

d_alias\uff1a\u4e00\u4e2a\u6587\u4ef6\u53ef\u80fd\u6709\u591a\u4e2a\u540d\u79f0\uff08\u786c\u94fe\u63a5\uff09\uff0c\u5373\u591a\u4e2adentry\uff0c\u5219\u4e00\u4e2a\u6587\u4ef6\u7684\u6240\u6709\u76ee\u5f55\u9879\u5219\u5f62\u6210\u4e00\u4e2a\u94fe\u8868\uff0c\u8fd9\u4e2a\u94fe\u8868\u5934\u4f4d\u4e8e\u8be5\u6587\u4ef6inode\u4e2d\u7684i_dentry\u5b57\u6bb5\uff0cd_alias\u5145\u5f53\u7684\u8be5\u94fe\u8868\u4e2d\u7684\u7ed3\u70b9\uff1b<\/p>\n

vfsmount\u7ed3\u6784<\/strong><\/p>\n

\u6bcf\u4e2a\u6302\u8f7d\u5728\u5185\u6838\u76ee\u5f55\u6811\u4e2d\u7684\u6587\u4ef6\u7cfb\u7edf\u90fd\u5c06\u5bf9\u5e94\u4e00\u4e2avfsmount\u7ed3\u6784\uff0c\u4e0b\u9762\u5c06\u5bf9\u8be5\u7ed3\u6784\u4e2d\u7684\u90e8\u5206\u5b57\u6bb5\u8fdb\u884c\u8bf4\u660e\u3002\u5047\u8bbe\u8bbe\u5907\/dev\/sdc\u4e3antfs\u6587\u4ef6\u7cfb\u7edf\uff0c\u73b0\u9700\u8981\u5c06\u5176\u6302\u8f7d\u5728\u6587\u4ef6\u7cfb\u7edf\u4e3aext3\u7684\/home\/edsionte\/work\u4e0b\u3002\u56e0\u6b64\uff0c\/home\/edsionte\/work\u53ef\u4ee5\u88ab\u79f0\u4e3antfs\u6587\u4ef6\u7cfb\u7edf\u7684\u6302\u8f7d\u70b9\uff0c\u5e76\u4e14\u79f0ntfs\u6587\u4ef6\u7cfb\u7edf\u4e0eext3\u6587\u4ef6\u7cfb\u7edf\u5f62\u6210\u7236\u5b50\u6587\u4ef6\u6587\u4ef6\u7cfb\u7edf\u5173\u7cfb\u3002\u540c\u65f6ntfs\u4e5f\u53ef\u79f0\u4e3a\u6e90\u6587\u4ef6\u7cfb\u7edf\uff0c\u800cext3\u4e5f\u53ef\u79f0\u4e3a\u76ee\u7684\u6587\u4ef6\u7cfb\u7edf\u3002<\/p>\n

mnt_hash\uff1a\u5185\u6838\u5c06\u7cfb\u7edf\u5185\u6240\u6709\u5df2\u6302\u8f7d\u7684\u6587\u4ef6\u7cfb\u7edf\u901a\u8fc7\u6563\u5217\u8868\u7684\u5f62\u5f0f\u8fdb\u884c\u7ec4\u7ec7\uff0c\u6bcf\u4e2avfsmount\u5c06\u5904\u4e8e\u5176\u5bf9\u5e94\u54c8\u5e0c\u503c\u7684\u51b2\u7a81\u94fe\u8868\u5f53\u4e2d\u3002mnt_hash\u5b57\u6bb5\u5219\u4e3a\u5177\u4f53\u51b2\u7a81\u94fe\u8868\u7684\u5143\u7d20\u3002<\/p>\n

mnt_mounts\uff1a\u5982\u679c\u5f53\u524d\u6587\u4ef6\u7cfb\u7edf\u4e0b\u6302\u8f7d\u4e86\u5176\u4ed6\u7684\u5b50\u6587\u4ef6\u7cfb\u7edf\uff0c\u90a3\u4e48\u8fd9\u4e9b\u5b50\u6587\u4ef6\u7cfb\u7edf\u5c06\u901a\u8fc7\u81ea\u8eabvfsmount\u4e2d\u7684mnt_child\u5b57\u6bb5\u7ec4\u6210\u4e00\u4e2a\u94fe\u8868\uff0c\u8be5\u94fe\u8868\u5934\u4e3a\u7236\u6587\u4ef6\u7cfb\u7edf\u4e2d\u7684mnt_mounts\u5b57\u6bb5\u3002<\/p>\n

mnt_child\uff1a\u5f53\u524d\u6587\u4ef6\u7cfb\u7edf\u5c06\u901a\u8fc7\u8be5\u5b57\u6bb5\u4e0e\u5176\u4ed6\u7236\u6587\u4ef6\u7cfb\u7edf\u4e0b\u7684\u5b50\u6587\u4ef6\u7cfb\u7edf\u7ec4\u6210\u4e00\u4e2a\u94fe\u8868\u3002<\/p>\n

mnt_parent\uff1a\u8be5\u5b57\u6bb5\u6307\u5411\u7236\u6587\u4ef6\u7cfb\u7edf\u5bf9\u5e94\u7684vfsmount\u7ed3\u6784\u3002\u5373\u6307\u5411ext3\u6587\u4ef6\u7cfb\u7edf\u5bf9\u5e94\u7684vfsmount\u7ed3\u6784\u3002<\/p>\n

mnt_mountpoint\uff1a\u8be5\u5b57\u6bb5\u8868\u793a\u6e90\u6587\u4ef6\u7cfb\u7edf\u5728\u76ee\u7684\u6587\u4ef6\u7cfb\u7edf\u4e2d\u6302\u8f7d\u70b9\u5bf9\u5e94\u7684dentry\u7ed3\u6784\u3002\/home\/edsionte\/work\u4e3a\u6302\u8f7d\u70b9\uff0c\u5219\u8be5\u5b57\u6bb5\u6307\u5411\u76ee\u5f55\u9879work\u3002<\/p>\n

mnt_root\uff1a\u6307\u5411\u5f53\u524d\u6587\u4ef6\u7cfb\u7edf\u7684\u6839\u76ee\u5f55\u9879\u3002\u5bf9\u4e8e\u6e90\u6587\u4ef6\u7cfb\u7edfntfs\u6765\u8bf4\uff0c\u6839\u76ee\u5f55\u9879\u76f8\u5bf9\u4e3a\/\uff0c\u4f46\u5728\u6574\u4e2a\u7cfb\u7edf\u76ee\u5f55\u6811\u4e2d\uff0c\u6839\u76ee\u5f55\u9879\u4e3awork\u3002<\/p>\n

mnt_sb\uff1a\u6bcf\u4e2a\u6587\u4ef6\u7cfb\u7edf\u90fd\u5c06\u5bf9\u5e94\u4e00\u4e2asuper_block\u7ed3\u6784\uff0c\u8be5\u5b57\u6bb5\u6307\u5411\/dev\/sdc\u8bbe\u5907\u4e0a\u6587\u4ef6\u7cfb\u7edf\u5bf9\u5e94\u7684\u8d85\u7ea7\u5757\u3002<\/p>\n

mnt_list\uff1a\u6240\u6709\u5904\u4e8e\u4e00\u4e2a\u540d\u5b57\u7a7a\u95f4\u7684\u6587\u4ef6\u7cfb\u7edf\u901a\u8fc7mnt_list\u5b57\u6bb5\u94fe\u63a5\u5728\u4e00\u8d77\uff0c\u800c\u8be5\u94fe\u8868\u7684\u8868\u5934\u4e3a\u8be5\u540d\u5b57\u7a7a\u95f4\u7ed3\u6784\u4e2d\u7684list\u5b57\u6bb5\u3002<\/p>\n

mnt_ns\uff1a\u8be5\u5b57\u6bb5\u8868\u793a\u5f53\u524dvfsmount\u6240\u5bf9\u5e94\u7684\u540d\u5b57\u7a7a\u95f4\u7ed3\u6784\u3002<\/p>\n

nameidata\u7ed3\u6784<\/strong><\/p>\n

\u6587\u4ef6\u8def\u5f84\u662f\u7531\u5404\u7ea7\u522b\u7684\u76ee\u5f55\u9879\u7ec4\u6210\u7684\uff0c\u56e0\u6b64\u8def\u5f84\u7684\u67e5\u627e\u8fc7\u7a0b\u662f\u5bf9\u76ee\u5f55\u9879\u7684\u9010\u7ea7\u67e5\u627e\u3002nameidata\u7ed3\u6784\u662f\u8def\u5f84\u67e5\u627e\u8fc7\u7a0b\u4e2d\u7684\u6838\u5fc3\u6570\u636e\u7ed3\u6784\uff0c\u5728\u6bcf\u4e00\u7ea7\u76ee\u5f55\u9879\u67e5\u627e\u8fc7\u7a0b\u4e2d\uff0c\u5b83\u5411\u67e5\u627e\u51fd\u6570\u8f93\u5165\u53c2\u6570\uff0c\u5e76\u4e14\u4fdd\u5b58\u672c\u6b21\u67e5\u627e\u7684\u7ed3\u679c\uff0c\u56e0\u6b64\u5b83\u662f\u4e0d\u65ad\u53d8\u5316\u7684\u3002<\/p>\n

\u4e0b\u9762\u5bf9nameidata\u7ed3\u6784\u4e2d\u7684\u90e8\u5206\u5b57\u6bb5\u8fdb\u884c\u8bf4\u660e\u3002<\/p>\n

path\uff1a\u8be5\u5b57\u6bb5\u7528\u4e8e\u4fdd\u5b58\u5f53\u524d\u76ee\u5f55\u9879\u3002\u8be5\u5b57\u6bb5\u662fpath\u7ed3\u6784\uff0c\u8be5\u7ed3\u6784\u5c06\u76ee\u5f55\u9879\u548c\u8be5\u76ee\u5f55\u9879\u6240\u5173\u8054\u7684vfsmount\u7ed3\u6784\u8fdb\u884c\u5c01\u88c5\u3002<\/p>\n

last\uff1a\u8be5\u5b57\u6bb5\u4e3aqstr\u7ed3\u6784\uff0c\u8868\u793a\u5f53\u524d\u76ee\u5f55\u9879\u7684\u540d\u79f0\u3002<\/p>\n

root\uff1a\u8be5\u5b57\u6bb5\u4e3apath\u7ed3\u6784\uff0c\u8868\u793a\u6839\u76ee\u5f55\u3002<\/p>\n

last_type\uff1a\u8868\u793a\u5f53\u524d\u76ee\u5f55\u9879\u7684\u7c7b\u578b\u3002<\/p>\n

inode\uff1a\u8868\u793a\u5f53\u524d\u76ee\u5f55\u9879\u5bf9\u5e94\u7684inode\uff0c\u5b83\u7684\u53d6\u503c\u6765\u81ea\u4e8epath.dentry.d_inode\u3002<\/p>\n

depth\uff1a\u8868\u793a\u7b26\u53f7\u94fe\u63a5\u5f53\u524d\u7684\u5d4c\u5957\u7ea7\u522b\uff0c\u6700\u5927\u4e0d\u80fd\u8d85\u8fc7MAX_NESTED_LINKS\uff1b<\/p>\n

saved_names\uff1a\u8be5\u5b57\u7b26\u4e32\u6570\u7ec4\u8868\u793a\u7b26\u53f7\u94fe\u63a5\u6bcf\u4e2a\u5d4c\u5957\u7ea7\u522b\u7684\u540d\u79f0\uff1b<\/p>\n

\u76ee\u5f55\u9879\u7684\u7c7b\u578b\u5305\u62ec\u4ee5\u4e0b\u51e0\u79cd\u60c5\u51b5\uff1a<\/p>\n

LAST_NORM:\u666e\u901a\u76ee\u5f55\u9879\uff1b<\/p>\n

LAST_ROOT\uff1a\u5f53\u524d\u76ee\u5f55\u9879\u4e3a\/\uff1b<\/p>\n

LAST_DOT\uff1a\u5f53\u524d\u76ee\u5f55\u9879\u4e3a.\uff1b<\/p>\n

LAST_DOTDOT\uff1a\u5f53\u524d\u76ee\u5f55\u9879\u4e3a..\uff1b<\/p>\n

LAST_BIND\uff1a\u5f53\u524d\u76ee\u5f55\u9879\u4e3a\u7b26\u53f7\u94fe\u63a5\u6587\u4ef6\uff1b<\/p>\n

3.\u57fa\u672c\u539f\u7406<\/h2>\n

rcu\u673a\u5236<\/strong><\/p>\n

\u5199\u65f6\u62f7\u8d1d\uff08rcu\uff0cRead-Copy-Update\uff09\u662fLinux\u5185\u6838\u7684\u4e00\u79cd\u9501\u673a\u5236\uff0c\u5b83\u662f\u4e00\u79cd\u6539\u826f\u7684rwlock\uff08\u4f46\u5e76\u4e0d\u80fd\u4ee3\u66ff\uff09\uff0c\u9002\u5408\u8bfb\u8005\u591a\u5199\u8005\u5c11\u7684\u60c5\u666f\uff0c\u53ef\u4ee5\u4fdd\u8bc1\u8bfb\u5199\u8005\u64cd\u4f5c\u540c\u65f6\u8fdb\u884c\u3002<\/p>\n

\u5bf9\u4e8e\u8bfb\u8005\u800c\u8a00\uff0crcu\u673a\u5236\u53ef\u4ee5\u4fdd\u8bc1\u591a\u4e2a\u8bfb\u8005\u5728\u4e0d\u7533\u8bf7\u9501\u7684\u60c5\u51b5\u4e0b\u76f4\u63a5\u5bf9\u4e34\u754c\u533a\u8d44\u6e90\u8fdb\u884c\u8bbf\u95ee\u3002\u5bf9\u4e8e\u5199\u8005\u800c\u8a00\uff0c\u5b83\u4e4b\u6240\u4ee5\u53ef\u4ee5\u4e0e\u8bfb\u8005\u540c\u65f6\u8bbf\u95ee\u5171\u4eab\u8d44\u6e90\uff0c\u662f\u56e0\u4e3a\u5728\u8bfb\u8005\u8bfb\u53d6\u539f\u59cb\u6570\u636e\u7684\u540c\u65f6\u5b83\u4fee\u6539\u7684\u662f\u539f\u59cb\u6570\u636e\u7684\u5907\u4efd\u3002\u5f53\u6240\u6709\u8bfb\u8005\u90fd\u9000\u51fa\u8bbf\u95ee\u8be5\u5171\u4eab\u8d44\u6e90\u65f6\uff0c\u5199\u7740\u5c06\u7528\u4fee\u6539\u540e\u7684\u65b0\u6570\u636e\u66ff\u6362\u539f\u59cb\u6570\u636e\u3002\u540c\u65f6\uff0crcu\u4e2d\u7684\u56de\u6536\u673a\u5236\u5c06\u5bf9\u539f\u59cb\u6570\u636e\u8fdb\u884c\u56de\u6536\u3002<\/p>\n

\u4e0erwlock\u76f8\u6bd4\uff0c\u5728\u8bfb\u591a\u5199\u5c11\u7684\u60c5\u51b5\u4e0b\uff0crcu\u7684\u6548\u7387\u4f1a\u9ad8\u5f88\u591a\u3002\u56e0\u4e3arcu\u6240\u63d0\u4f9b\u7684\u62f7\u8d1d\u6280\u672f\u4f7f\u8bfb\u5199\u8005\u53ef\u4ee5\u540c\u65f6\u8bbf\u95ee\u5171\u4eab\u8d44\u6e90\uff0c\u56e0\u6b64\u514d\u53bb\u4e86\u8bfb\u5199\u8005\u7533\u8bf7\u9501\u65f6\u6240\u82b1\u8d39\u7684\u5f00\u9500\u3002<\/p>\n

\u7531\u4e8ercu\u673a\u5236\u7684\u81ea\u8eab\u7279\u70b9\uff0c\u5b83\u6240\u4f7f\u7528\u7684\u4e0a\u4e0b\u6587\u5fc5\u987b\u662f\u4e0d\u53ef\u7761\u7720\u7684\u3002\u56e0\u4e3a\uff0c\u5199\u8005\u5728\u66ff\u6362\u539f\u59cb\u6570\u636e\u4e4b\u524d\u4f1a\u7b49\u5f85\u6240\u6709\u8bfb\u8005\u9000\u51fa\u4e34\u754c\u533a\uff0c\u800c\u6b64\u65f6\u5982\u679c\u8bfb\u8005\u5904\u4e8e\u963b\u585e\u72b6\u6001\uff0c\u90a3\u4e48\u7cfb\u7edf\u5c06\u8fdb\u5165\u6b7b\u9501\u72b6\u6001\u3002<\/p>\n

rcu-walk\u548cref-walk<\/strong><\/p>\n

\u5185\u6838\u4e2d\u7684\u8def\u5f84\u67e5\u627e\u63d0\u4f9b\u4e24\u79cd\u6a21\u5f0f\uff1aref-walk\u548crcu-walk\u3002\u524d\u8005\u662f\u5185\u6838\u4e2d\u4f20\u7edf\u7684\u8def\u5f84\u67e5\u627e\u65b9\u5f0f\uff0c\u800cref-walk\u662f\u57fa\u4e8ercu\u6240\u673a\u5236\u7684\u4e00\u79cd\u8def\u5f84\u67e5\u627e\u6a21\u5f0f\u3002\u7531\u4e8e\u8def\u5f84\u67e5\u627e\u6b63\u597d\u662f\u4e00\u4e2a\u8bfb\u591a\u5199\u5c11\u7684\u60c5\u666f\uff0c\u57fa\u4e8ercu\u673a\u5236\u5feb\u901f\u9ad8\u6548\u7684\u7279\u70b9\uff0c\u8be5\u6a21\u5f0f\u53ef\u4ee5\u9ad8\u6548\u7684\u8fdb\u884c\u8def\u5f84\u67e5\u627e\u3002\u4e0d\u8fc7\uff0crcu-walk\u5e76\u4e0d\u662f\u4e07\u80fd\u7684\uff0c\u5982\u679c\u8def\u5f84\u67e5\u627e\u8fc7\u7a0b\u4e2d\u9700\u8981\u7761\u7720\uff0c\u90a3\u4e48\u5fc5\u987b\u5c06\u67e5\u627e\u6a21\u5f0f\u7531rcu-walk\u5207\u6362\u5230ref-walk\u3002<\/p>\n

4.\u603b\u7ed3<\/h2>\n

\u672c\u7bc7\u5bf9open()\u5728\u5185\u6838\u5b9e\u73b0\u4e2d\u6240\u6d89\u53ca\u7684\u6570\u636e\u7ed3\u6784\u548c\u539f\u7406\u8fdb\u884c\u5b9e\u73b0\u8bf4\u660e\uff0c\u5e76\u4e14\u9488\u5bf9open()\u5b9e\u73b0\u8fc7\u7a0b\u7684\u4e00\u4e9b\u95ee\u9898\u8fdb\u884cQ&A\u3002\u53ef\u4ee5\u5728\u9605\u8bfbopen()\u5185\u6838\u6e90\u7801\u4e4b\u524d\u9605\u8bfb\u672c\u6587\uff0c\u4e5f\u53ef\u5728\u9605\u8bfb\u4e4b\u540e\u518d\u6b21\u9605\u8bfb\u672c\u6587\u3002<\/p>\n

\u53c2\u8003\u8d44\u6599\uff1a<\/strong><\/p>\n

1.Linux\u6e90\u78013.2.69\uff1b<\/strong><\/p>\n

2.\u6df1\u5165\u7406\u89e3Linux\u5185\u6838\uff1ahttp:\/\/book.douban.com\/subject\/2287506\/\uff1b<\/strong><\/p>\n

3.\u6df1\u5165Linux\u5185\u6838\u67b6\u6784\uff1ahttp:\/\/book.douban.com\/subject\/4843567\/\uff1b<\/strong><\/p>\n

4.Linux\u5185\u6838\u63a2\u79d8\uff1ahttp:\/\/book.douban.com\/subject\/25817503\/\uff1b<\/strong><\/p>\n","protected":false},"excerpt":{"rendered":"

1.\u57fa\u672c\u8bf4\u660e \u201copen()\u5728Linux\u5185\u6838\u7684\u5b9e\u73b0\u201d\u7cfb\u5217\u6587\u7ae0\u5c06\u5206\u6790open\u7cfb\u7edf\u8c03\u7528\u5728Linux\u5185\u6838\u4e2d\u7684\u5b9e\u73b0\u8fc7\u7a0b […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[110,175],"tags":[390,181,151,179],"class_list":["post-4470","post","type-post","status-publish","format-standard","hentry","category-linux","category-175","tag-open","tag-181","tag-151","tag-179"],"views":8615,"_links":{"self":[{"href":"http:\/\/edsionte.com\/techblog\/wp-json\/wp\/v2\/posts\/4470","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/edsionte.com\/techblog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/edsionte.com\/techblog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/edsionte.com\/techblog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/edsionte.com\/techblog\/wp-json\/wp\/v2\/comments?post=4470"}],"version-history":[{"count":11,"href":"http:\/\/edsionte.com\/techblog\/wp-json\/wp\/v2\/posts\/4470\/revisions"}],"predecessor-version":[{"id":4544,"href":"http:\/\/edsionte.com\/techblog\/wp-json\/wp\/v2\/posts\/4470\/revisions\/4544"}],"wp:attachment":[{"href":"http:\/\/edsionte.com\/techblog\/wp-json\/wp\/v2\/media?parent=4470"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/edsionte.com\/techblog\/wp-json\/wp\/v2\/categories?post=4470"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/edsionte.com\/techblog\/wp-json\/wp\/v2\/tags?post=4470"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}