2007-07-05 16:01:35 +00:00
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#ifndef __FS_H
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#define __FS_H
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#include <driver.h>
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#define FS_TYPE_CRAMFS 1
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#define FS_TYPE_RAMFS 2
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#define FS_TYPE_DEVFS 3
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2007-07-05 16:01:35 +00:00
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2007-07-05 16:01:37 +00:00
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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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ulong pos; /* current position in stream */
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ulong 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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ulong type;
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char *name;
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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 (*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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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 (*erase)(struct device_d *dev, FILE *f, size_t count,
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unsigned long offset);
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int (*protect)(struct device_d *dev, FILE *f, size_t count,
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unsigned long offset, int prot);
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2007-07-15 11:50:04 +00:00
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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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unsigned long flags;
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};
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2007-10-19 06:45:57 +00:00
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struct mtab_entry {
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char path[PATH_MAX];
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struct mtab_entry *next;
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struct device_d *dev;
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struct device_d *parent_device;
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};
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struct fs_device_d {
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struct device_d *parent; /* 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 mtab_entry mtab;
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};
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2007-07-05 16:02:12 +00:00
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/*
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* standard posix file functions
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*/
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2007-09-24 15:03:20 +00:00
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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 stat(const char *filename, struct stat *s);
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int read(int fd, void *buf, size_t count);
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ssize_t write(int fd, const void *buf, size_t count);
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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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off_t lseek(int fildes, off_t offset, int whence);
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2007-09-24 15:03:20 +00:00
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int mkdir (const char *pathname, mode_t mode);
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2007-09-27 09:59:18 +00:00
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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 mount (const char *device, const char *fsname, const char *path);
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int umount(const char *pathname);
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2007-07-16 08:29:28 +00:00
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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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2007-07-15 11:50:04 +00:00
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void *memmap(int fd, int flags);
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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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int ls(const char *path, ulong flags);
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char *mkmodestr(unsigned long mode, char *str);
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2007-07-05 16:02:12 +00:00
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/*
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* Information about mounted devices.
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* Note that we only support mounting on directories lying
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* directly in / and of course the root directory itself
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*/
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struct mtab_entry *get_mtab_entry_by_path(const char *path);
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struct mtab_entry *mtab_next_entry(struct mtab_entry *entry);
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2007-10-19 06:45:57 +00:00
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const char *fsdev_get_mountpoint(struct fs_device_d *fsdev);
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2007-07-05 16:02:12 +00:00
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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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2007-09-27 14:33:35 +00:00
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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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2007-07-05 16:02:12 +00:00
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/*
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* This function turn '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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#endif /* __FS_H */
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