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新版文件系统重构完成 (#198)
1.重构：VFS 2. 重构：ProcFS 3. 重构：DevFS 4. 重构：FAT32 5. 重构：AHCI驱动 6. 新增：RamFS 7. 新增：MountFS 8. 新增：FAT12 9. 新增：FAT16 10. 重构：设备抽象 Co-authored-by: guanjinquan <1666320330@qq.com> Co-authored-by: DaJiYuQia <88259094+DaJiYuQia@users.noreply.github.com>
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@ -5,15 +5,59 @@
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extern "C" {
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#endif
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/**
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* @brief inode的属性（copy from vfs.h）
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/*
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* This is a header for the common implementation of dirent
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* to fs on-disk file type conversion. Although the fs on-disk
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* bits are specific to every file system, in practice, many
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* file systems use the exact same on-disk format to describe
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* the lower 3 file type bits that represent the 7 POSIX file
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* types.
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*
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* It is important to note that the definitions in this
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* header MUST NOT change. This would break both the
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* userspace ABI and the on-disk format of filesystems
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* using this code.
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*
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* All those file systems can use this generic code for the
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* conversions.
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*/
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#define VFS_IF_FILE (1UL << 0)
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#define VFS_IF_DIR (1UL << 1)
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#define VFS_IF_DEVICE (1UL << 2)
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/*
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* struct dirent file types
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* exposed to user via getdents(2), readdir(3)
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*
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* These match bits 12..15 of stat.st_mode
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* (ie "(i_mode >> 12) & 15").
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*/
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// 完整含义请见 http://www.gnu.org/software/libc/manual/html_node/Directory-Entries.html
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#define S_DT_SHIFT 12
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#define S_DT(mode) (((mode) & S_IFMT) >> S_DT_SHIFT)
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#define S_DT_MASK (S_IFMT >> S_DT_SHIFT)
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/* these are defined by POSIX and also present in glibc's dirent.h */
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#define DT_UNKNOWN 0
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// 命名管道，或者FIFO
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#define DT_FIFO 1
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// 字符设备
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#define DT_CHR 2
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// 目录
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#define DT_DIR 4
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// 块设备
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#define DT_BLK 6
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// 常规文件
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#define DT_REG 8
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// 符号链接
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#define DT_LNK 10
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// 是一个socket
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#define DT_SOCK 12
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// 这个是抄Linux的，还不知道含义
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#define DT_WHT 14
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#define DT_MAX (S_DT_MASK + 1) /* 16 */
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#define DIR_BUF_SIZE 256
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/**
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* @brief 文件夹结构体
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*
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@ -10,63 +10,64 @@
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*/
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#pragma once
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#if defined(__cplusplus)
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extern "C" {
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#if defined(__cplusplus)
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extern "C"
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{
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#endif
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#define E2BIG 1 /* 参数列表过长，或者在输出buffer中缺少空间 或者参数比系统内建的最大值要大 Argument list too long. */
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#define EACCES 2 /* 访问被拒绝 Permission denied */
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#define EADDRINUSE 3 /* 地址正在被使用 Address in use.*/
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#define EADDRNOTAVAIL 4 /* 地址不可用 Address not available.*/
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#define EAFNOSUPPORT 5 /* 地址family不支持 Address family not supported. */
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#define EAGAIN 6 /* 资源不可用，请重试。 Resource unavailable, try again (may be the same value as [EWOULDBLOCK]).*/
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#define EALREADY 7 /* 连接已经在处理 Connection already in progress. */
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#define EBADF 8 /* 错误的文件描述符 Bad file descriptor. */
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#define EBADMSG 9 /* 错误的消息 Bad message. */
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#define E2BIG 1 /* 参数列表过长，或者在输出buffer中缺少空间 或者参数比系统内建的最大值要大 Argument list too long. */
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#define EACCES 2 /* 访问被拒绝 Permission denied */
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#define EADDRINUSE 3 /* 地址正在被使用 Address in use.*/
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#define EADDRNOTAVAIL 4 /* 地址不可用 Address not available.*/
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#define EAFNOSUPPORT 5 /* 地址family不支持 Address family not supported. */
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#define EAGAIN 6 /* 资源不可用，请重试。 Resource unavailable, try again (may be the same value as [EWOULDBLOCK]).*/
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#define EALREADY 7 /* 连接已经在处理 Connection already in progress. */
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#define EBADF 8 /* 错误的文件描述符 Bad file descriptor. */
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#define EBADMSG 9 /* 错误的消息 Bad message. */
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#define EBUSY 10 /* 设备或资源忙 Device or resource busy. */
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#define ECANCELED 11 /* 操作被取消 Operation canceled. */
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#define ECHILD 12 /* 没有子进程 No child processes. */
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#define ECONNABORTED 13 /* 连接已断开 Connection aborted. */
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#define ECONNREFUSED 14 /* 连接被拒绝 Connection refused. */
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#define ECONNRESET 15 /* 连接被重置 Connection reset. */
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#define EDEADLK 16 /* 资源死锁将要发生 Resource deadlock would occur. */
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#define EDESTADDRREQ 17 /* 需要目标地址 Destination address required.*/
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#define EDOM 18 /* 数学参数超出作用域 Mathematics argument out of domain of function. */
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#define EDQUOT 19 /* 保留使用 Reserved */
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#define EBUSY 10 /* 设备或资源忙 Device or resource busy. */
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#define ECANCELED 11 /* 操作被取消 Operation canceled. */
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#define ECHILD 12 /* 没有子进程 No child processes. */
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#define ECONNABORTED 13 /* 连接已断开 Connection aborted. */
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#define ECONNREFUSED 14 /* 连接被拒绝 Connection refused. */
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#define ECONNRESET 15 /* 连接被重置 Connection reset. */
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#define EDEADLK 16 /* 资源死锁将要发生 Resource deadlock would occur. */
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#define EDESTADDRREQ 17 /* 需要目标地址 Destination address required.*/
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#define EDOM 18 /* 数学参数超出作用域 Mathematics argument out of domain of function. */
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#define EDQUOT 19 /* 保留使用 Reserved */
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#define EEXIST 20 /* 文件已存在 File exists. */
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#define EFAULT 21 /* 错误的地址 Bad address */
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#define EFBIG 22 /* 文件太大 File too large. */
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#define EHOSTUNREACH 23 /* 主机不可达 Host is unreachable.*/
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#define EIDRM 24 /* 标志符被移除 Identifier removed. */
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#define EILSEQ 25 /* 不合法的字符序列 Illegal byte sequence. */
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#define EINPROGRESS 26 /* 操作正在处理 Operation in progress. */
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#define EINTR 27 /* 被中断的函数 Interrupted function. */
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#define EINVAL 28 /* 不可用的参数 Invalid argument. */
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#define EIO 29 /* I/O错误 I/O error. */
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#define EEXIST 20 /* 文件已存在 File exists. */
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#define EFAULT 21 /* 错误的地址 Bad address */
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#define EFBIG 22 /* 文件太大 File too large. */
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#define EHOSTUNREACH 23 /* 主机不可达 Host is unreachable.*/
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#define EIDRM 24 /* 标志符被移除 Identifier removed. */
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#define EILSEQ 25 /* 不合法的字符序列 Illegal byte sequence. */
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#define EINPROGRESS 26 /* 操作正在处理 Operation in progress. */
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#define EINTR 27 /* 被中断的函数 Interrupted function. */
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#define EINVAL 28 /* 不可用的参数 Invalid argument. */
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#define EIO 29 /* I/O错误 I/O error. */
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#define EISCONN 30 /* 套接字已连接 Socket is connected. */
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#define EISDIR 31 /* 是一个目录 Is a directory */
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#define ELOOP 32 /* 符号链接级别过多 Too many levels of symbolic links. */
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#define EMFILE 33 /* 文件描述符的值过大 File descriptor value too large. */
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#define EMLINK 34 /* 链接数过多 Too many links. */
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#define EMSGSIZE 35 /* 消息过大 Message too large. */
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#define EMULTIHOP 36 /* 保留使用 Reserved. */
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#define ENAMETOOLONG 37 /* 文件名过长 Filename too long. */
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#define ENETDOWN 38 /* 网络已关闭 Network is down. */
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#define ENETRESET 39 /* 网络连接已断开 Connection aborted by network. */
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#define EISCONN 30 /* 套接字已连接 Socket is connected. */
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#define EISDIR 31 /* 是一个目录 Is a directory */
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#define ELOOP 32 /* 符号链接级别过多 Too many levels of symbolic links. */
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#define EMFILE 33 /* 文件描述符的值过大 File descriptor value too large. */
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#define EMLINK 34 /* 链接数过多 Too many links. */
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#define EMSGSIZE 35 /* 消息过大 Message too large. */
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#define EMULTIHOP 36 /* 保留使用 Reserved. */
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#define ENAMETOOLONG 37 /* 文件名过长 Filename too long. */
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#define ENETDOWN 38 /* 网络已关闭 Network is down. */
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#define ENETRESET 39 /* 网络连接已断开 Connection aborted by network. */
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#define ENETUNREACH 40 /* 网络不可达 Network unreachable. */
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#define ENFILE 41 /* 系统中打开的文件过多 Too many files open in system.*/
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#define ENOBUFS 42 /* 缓冲区空间不足 No buffer space available. */
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#define ENODATA 43 /* 队列头没有可读取的消息 No message is available on the STREAM head read queue. */
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#define ENODEV 44 /* 没有指定的设备 No such device. */
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#define ENOENT 45 /* 没有指定的文件或目录 No such file or directory. */
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#define ENOEXEC 46 /* 可执行文件格式错误 Executable file format error. */
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#define ENOLCK 47 /* 没有可用的锁 No locks available. */
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#define ENOLINK 48 /* 保留 Reserved. */
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#define ENOMEM 49 /* 没有足够的空间 Not enough space. */
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#define ENETUNREACH 40 /* 网络不可达 Network unreachable. */
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#define ENFILE 41 /* 系统中打开的文件过多 Too many files open in system.*/
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#define ENOBUFS 42 /* 缓冲区空间不足 No buffer space available. */
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#define ENODATA 43 /* 队列头没有可读取的消息 No message is available on the STREAM head read queue. */
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#define ENODEV 44 /* 没有指定的设备 No such device. */
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#define ENOENT 45 /* 没有指定的文件或目录 No such file or directory. */
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#define ENOEXEC 46 /* 可执行文件格式错误 Executable file format error. */
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#define ENOLCK 47 /* 没有可用的锁 No locks available. */
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#define ENOLINK 48 /* 保留 Reserved. */
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#define ENOMEM 49 /* 没有足够的空间 Not enough space. */
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#define ENOMSG 50 /* 没有期待类型的消息 No message of the desired type. */
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#define ENOPROTOOPT 51 /* 协议不可用 Protocol not available. */
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@ -77,35 +78,35 @@ extern "C" {
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#define ENOTCONN 56 /* 套接字未连接 The socket is not connected. */
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#define ENOTDIR 57 /* 不是目录 Not a directory. */
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#define ENOTEMPTY 58 /* 目录非空 Directory not empty. */
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#define ENOTRECOVERABLE 59 /* 状态不可覆盖 State not recoverable. */
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#define ENOTRECOVERABLE 59 /* 状态不可恢复 State not recoverable. */
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#define ENOTSOCK 60 /* 不是一个套接字 Not a socket.*/
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#define ENOTSUP 61 /* 不被支持 Not supported (may be the same value as [EOPNOTSUPP]). */
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#define ENOTTY 62 /* 不正确的I/O控制操作 Inappropriate I/O control operation. */
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#define ENXIO 63 /* 没有这样的设备或地址 No such device or address. */
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#define EOPNOTSUPP 64 /* 套接字不支持该操作 Operation not supported on socket (may be the same value as [ENOTSUP]). */
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#define EOVERFLOW 65 /* 数值过大，产生溢出 Value too large to be stored in data type. */
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#define EOWNERDEAD 66 /* 之前的拥有者挂了 Previous owner died. */
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#define EPERM 67 /* 操作不被允许 Operation not permitted. */
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#define EPIPE 68 /* 断开的管道 Broken pipe. */
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#define EPROTO 69 /* 协议错误 Protocol error. */
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#define ENOTSOCK 60 /* 不是一个套接字 Not a socket.*/
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#define ENOTSUP 61 /* 不被支持 Not supported (may be the same value as [EOPNOTSUPP]). */
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#define ENOTTY 62 /* 不正确的I/O控制操作 Inappropriate I/O control operation. */
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#define ENXIO 63 /* 没有这样的设备或地址 No such device or address. */
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#define EOPNOTSUPP 64 /* 套接字不支持该操作 Operation not supported on socket (may be the same value as [ENOTSUP]). */
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#define EOVERFLOW 65 /* 数值过大，产生溢出 Value too large to be stored in data type. */
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#define EOWNERDEAD 66 /* 之前的拥有者挂了 Previous owner died. */
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#define EPERM 67 /* 操作不被允许 Operation not permitted. */
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#define EPIPE 68 /* 断开的管道 Broken pipe. */
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#define EPROTO 69 /* 协议错误 Protocol error. */
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#define EPROTONOSUPPORT 70 /* 协议不被支持 Protocol not supported. */
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#define EPROTOTYPE 71 /* 对于套接字而言，错误的协议 Protocol wrong type for socket. */
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#define ERANGE 72 /* 结果过大 Result too large. */
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#define EROFS 73 /* 只读的文件系统 Read-only file system. */
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#define ESPIPE 74 /* 错误的寻道 Invalid seek. */
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#define ESPIPE 74 /* 错误的寻道.当前文件是pipe，不允许seek请求 Invalid seek. */
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#define ESRCH 75 /* 没有这样的进程 No such process. */
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#define ESTALE 76 /* 保留 Reserved. */
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#define ETIME 77 /* 流式ioctl()超时 Stream ioctl() timeout */
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#define ETIMEDOUT 78 /* 连接超时 Connection timed out.*/
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#define ETXTBSY 79 /* 文本文件忙 Text file busy. */
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#define EWOULDBLOCK 80 /* 操作将被禁止 Operation would block (may be the same value as [EAGAIN]). */
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#define EXDEV 81 /* 跨设备连接 Cross-device link. */
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#define EWOULDBLOCK 80 /* 操作将被禁止 Operation would block (may be the same value as [EAGAIN]). */
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#define EXDEV 81 /* 跨设备连接 Cross-device link. */
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extern int errno;
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extern int errno;
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#if defined(__cplusplus)
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} /* extern "C" */
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#if defined(__cplusplus)
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} /* extern "C" */
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#endif
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@ -12,27 +12,31 @@
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#if defined(__cplusplus)
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extern "C" {
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#endif
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#define O_RDONLY 00000000 // Open Read-only
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#define O_WRONLY 00000001 // Open Write-only
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#define O_RDWR 00000002 // Open read/write
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#endif
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#define O_RDONLY 00000000 // Open Read-only
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#define O_WRONLY 00000001 // Open Write-only
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#define O_RDWR 00000002 // Open read/write
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#define O_ACCMODE 00000003 // Mask for file access modes
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#define O_CREAT 00000100 // Create file if it does not exist
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#define O_EXCL 00000200 // Fail if file already exists
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#define O_CREAT 00000100 // Create file if it does not exist
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#define O_EXCL 00000200 // Fail if file already exists
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#define O_NOCTTY 00000400 // Do not assign controlling terminal
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#define O_TRUNC 00001000 // 文件存在且是普通文件，并以O_RDWR或O_WRONLY打开，则它会被清空
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#define O_APPEND 00002000 // 文件指针会被移动到文件末尾
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#define O_APPEND 00002000 // 文件指针会被移动到文件末尾
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#define O_NONBLOCK 00004000 // 非阻塞式IO模式
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#define O_EXEC 00010000 // 以仅执行的方式打开（非目录文件）
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#define O_SEARCH 00020000 // Open the directory for search only
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#define O_DIRECTORY 00040000 // 打开的必须是一个目录
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#define O_NOFOLLOW 00100000 // Do not follow symbolic links
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#define O_DSYNC 00010000 // used to be O_SYNC, see below
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#define FASYNC 00020000 // fcntl, for BSD compatibility
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#define O_DIRECT 00040000 // direct disk access hint
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#define O_LARGEFILE 00100000
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#define O_DIRECTORY 00200000 // 打开的必须是一个目录
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#define O_NOFOLLOW 00400000 // Do not follow symbolic links
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#define O_NOATIME 01000000
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#define O_CLOEXEC 02000000 // set close_on_exec
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/*
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* The constants AT_REMOVEDIR and AT_EACCESS have the same value. AT_EACCESS is
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