206 lines
6.2 KiB
C
206 lines
6.2 KiB
C
#ifndef __FS_H
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#define __FS_H
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#include <driver.h>
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#include <filetype.h>
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#define PATH_MAX 1024 /* include/linux/limits.h */
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struct partition;
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struct node_d;
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struct stat;
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struct dirent {
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char d_name[256];
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};
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typedef struct dir {
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struct device_d *dev;
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struct fs_driver_d *fsdrv;
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struct node_d *node;
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struct dirent d;
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void *priv; /* private data for the fs driver */
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} DIR;
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typedef struct filep {
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struct device_d *dev; /* The device this FILE belongs to */
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loff_t pos; /* current position in stream */
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#define FILE_SIZE_STREAM ((loff_t) -1)
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loff_t size; /* The size of this inode */
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ulong flags; /* the O_* flags from open */
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void *inode; /* private to the filesystem driver */
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/* private fields. Mapping between FILE and filedescriptor number */
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int no;
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char in_use;
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} FILE;
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#define FS_DRIVER_NO_DEV 1
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struct fs_driver_d {
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int (*probe) (struct device_d *dev);
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int (*mkdir)(struct device_d *dev, const char *pathname);
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int (*rmdir)(struct device_d *dev, const char *pathname);
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/* create a file. The file is guaranteed to not exist */
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int (*create)(struct device_d *dev, const char *pathname, mode_t mode);
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int (*unlink)(struct device_d *dev, const char *pathname);
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/* Truncate a file to given size */
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int (*truncate)(struct device_d *dev, FILE *f, ulong size);
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int (*symlink)(struct device_d *dev, const char *pathname,
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const char *newpath);
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int (*readlink)(struct device_d *dev, const char *pathname, char *name,
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size_t size);
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int (*open)(struct device_d *dev, FILE *f, const char *pathname);
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int (*close)(struct device_d *dev, FILE *f);
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int (*read)(struct device_d *dev, FILE *f, void *buf, size_t size);
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int (*write)(struct device_d *dev, FILE *f, const void *buf, size_t size);
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int (*flush)(struct device_d *dev, FILE *f);
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loff_t (*lseek)(struct device_d *dev, FILE *f, loff_t pos);
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struct dir* (*opendir)(struct device_d *dev, const char *pathname);
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struct dirent* (*readdir)(struct device_d *dev, struct dir *dir);
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int (*closedir)(struct device_d *dev, DIR *dir);
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int (*stat)(struct device_d *dev, const char *file, struct stat *stat);
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int (*ioctl)(struct device_d *dev, FILE *f, int request, void *buf);
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int (*erase)(struct device_d *dev, FILE *f, size_t count,
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loff_t offset);
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int (*protect)(struct device_d *dev, FILE *f, size_t count,
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loff_t offset, int prot);
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int (*memmap)(struct device_d *dev, FILE *f, void **map, int flags);
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struct driver_d drv;
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enum filetype type;
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unsigned long flags;
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};
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#define dev_to_fs_driver(d) container_of(d->driver, struct fs_driver_d, drv)
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#define dev_to_fs_device(d) container_of(d, struct fs_device_d, dev)
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extern struct list_head fs_device_list;
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#define for_each_fs_device(f) list_for_each_entry(f, &fs_device_list, list)
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extern struct bus_type fs_bus;
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struct fs_device_d {
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char *backingstore; /* the device we are associated with */
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struct device_d dev; /* our own device */
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struct fs_driver_d *driver;
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struct cdev *cdev;
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char *path;
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struct device_d *parent_device;
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struct list_head list;
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char *options;
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};
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#define drv_to_fs_driver(d) container_of(d, struct fs_driver_d, drv)
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/*
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* standard posix file functions
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*/
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int open(const char *pathname, int flags, ...);
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int creat(const char *pathname, mode_t mode);
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int unlink(const char *pathname);
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int close(int fd);
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int flush(int fd);
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int lstat(const char *filename, struct stat *s);
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int stat(const char *filename, struct stat *s);
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ssize_t read(int fd, void *buf, size_t count);
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ssize_t pread(int fd, void *buf, size_t count, loff_t offset);
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int ioctl(int fd, int request, void *buf);
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ssize_t write(int fd, const void *buf, size_t count);
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ssize_t pwrite(int fd, const void *buf, size_t count, loff_t offset);
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#define SEEK_SET 1
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#define SEEK_CUR 2
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#define SEEK_END 3
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loff_t lseek(int fildes, loff_t offset, int whence);
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int mkdir (const char *pathname, mode_t mode);
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/* Create a directory and its parents */
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int make_directory(const char *pathname);
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int rmdir (const char *pathname);
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const char *getcwd(void);
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int chdir(const char *pathname);
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DIR *opendir(const char *pathname);
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struct dirent *readdir(DIR *dir);
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int closedir(DIR *dir);
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int symlink(const char *pathname, const char *newpath);
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int readlink(const char *path, char *buf, size_t bufsiz);
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int mount (const char *device, const char *fsname, const char *path,
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const char *fsoptions);
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int umount(const char *pathname);
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/* not-so-standard functions */
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int erase(int fd, size_t count, unsigned long offset);
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int protect(int fd, size_t count, unsigned long offset, int prot);
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int protect_file(const char *file, int prot);
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void *memmap(int fd, int flags);
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#define FILESIZE_MAX ((loff_t)-1)
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#define PROT_READ 1
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#define PROT_WRITE 2
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#define LS_RECURSIVE 1
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#define LS_SHOWARG 2
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#define LS_COLUMN 4
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int ls(const char *path, ulong flags);
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char *mkmodestr(unsigned long mode, char *str);
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/*
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* Read a file into memory. Memory is allocated with malloc and must
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* be freed with free() afterwards. This function allocates one
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* byte more than actually needed and sets this to zero, so that
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* it can be used for text files.
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* If size is nonzero it s set to the file size.
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*/
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void *read_file(const char *filename, size_t *size);
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/*
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* Write a buffer to a file. This file is newly created.
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*/
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int write_file(const char *filename, void *buf, size_t size);
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/*
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* This function turns 'path' into an absolute path and removes all occurrences
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* of "..", "." and double slashes. The returned string must be freed wit free().
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*/
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char *normalise_path(const char *path);
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char *normalise_link(const char *pathname, const char* symlink);
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char *get_mounted_path(const char *path);
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struct cdev *get_cdev_by_mountpath(const char *path);
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/* Register a new filesystem driver */
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int register_fs_driver(struct fs_driver_d *fsdrv);
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void automount_remove(const char *_path);
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int automount_add(const char *path, const char *cmd);
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void automount_print(void);
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int unlink_recursive(const char *path, char **failedpath);
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int fsdev_open_cdev(struct fs_device_d *fsdev);
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const char *cdev_get_mount_path(struct cdev *cdev);
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const char *cdev_mount_default(struct cdev *cdev, const char *fsoptions);
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void mount_all(void);
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#endif /* __FS_H */
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