Linux下,保存⽂件属性的集合叫做inode,⼀个⽂件,⼀个inode,inode内有⼀个唯⼀的标识符,叫做inode号 所以⼀个⽂件的属性inode⻓什么样⼦呢? 代码语言:javascript 代码运行次数:0 运行 AI代码解释 /* * Structure of an inode on the disk */ struct ext2_inode { __le16 i_mode; /* Fi...
1318 1319 /* Being remounted read-only */ 1320 int s_readonly_remount; 1321 1322 /* AIO completions deferred from interrupt context */ 1323 struct workqueue_struct *s_dio_done_wq; 1324 1325 /* 1326 * Keep the lru lists last in the structure so they always sit on their 1327 * own...
VFS在整个Linux系统中的架构视图如下: Linux系统的User使用GLIBC(POSIX标准、GUN C运行时库)作为应用程序的运行时库,然后通过操作系统,将其转换为系统调用SCI(system-call interface),SCI是操作系统内核定义的系统调用接口,这层抽象允许用户程序的I/O操作转换为内核的接口调用。 2. 用户如何透明的去处理文件? 我们知...
. An important aspect is that an inode does not have information about the file name (it is retained by the associated struct dentry structure). 在linux文件系统中,一个文件只有一个对应的inode索引节点。当要访问一个文件时,一定要通过它的索引节点知道这个文件是什么类型的文件(比如设备文件等)、是...
//include\linux\sched.hstructtask_struct{……/* open file information */structfiles_struct*files;…… } 该结构体定义如下: /* * Open file table structure */structfiles_struct{/* * read mostly part */atomic_tcount;structfdtable__rcu*fdt;structfdtablefdtab;/* ...
//include\linux\sched.hstruct task_struct { …… /* open file information */ struct files_struct *files; ……} 1. 该结构体定义如下: /* * Open file table structure */struct files_struct { /* * read mostly part */atomic_t count;struct fdtable __rcu *fdt;struct fdtable fdtab; ...
总之,在Linux系统中,每个存在于存储设备中的对象都有相应唯一编号,并通过这种编码方式加以管理和访问。对于inode而言,则是通过将这些编号转换成索引节点数据结构(indoe structure)进行处理控制,并连接到其他相关属性和元数据信息上。 除了上述对inode编码格式的介绍,我们还可以进一步探讨inode结构中存储的具体信息和其所扮...
* This is the extent on-disk structure. * It's used at the bottom of the tree. */ struct ext4_extent { __le32 ee_block; /* first logical block extent covers */ __le16 ee_len; /* number of blocks covered by extent */
In older versions of Linux, it was possible to hard link a directory. It was even possible to have a given directory be its own parent. This was made possible because of inode implementation. This is now restricted to prevent users from creating a very confusing structure of directories. ...
Linux将文件系统分为了两层:VFS(虚拟文件系统)、具体文件系统,如下图所示: VFS VFS(Virtual Filesystem Switch)称为虚拟文件系统或虚拟文件系统转换,是一个内核软件层,在具体的文件系统之上抽象的一层,用来处理与Posix文件系统相关的所有调用,表现为能够给各种文件系统提供一个通用的接口,使上层的应用程序能够使用通用...