143 lines
4.7 KiB
C
143 lines
4.7 KiB
C
/* vim: tabstop=4 shiftwidth=4 noexpandtab
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*/
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#ifndef FS_H
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#define FS_H
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#define PATH_SEPARATOR '/'
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#define PATH_SEPARATOR_STRING "/"
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#define PATH_UP ".."
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#define PATH_DOT "."
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#define O_RDONLY 0x0000
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#define O_WRONLY 0x0001
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#define O_RDWR 0x0002
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#define O_APPEND 0x0008
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#define O_CREAT 0x0200
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#define O_TRUNC 0x0400
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#define O_EXCL 0x0800
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#define FS_FILE 0x01
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#define FS_DIRECTORY 0x02
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#define FS_CHARDEVICE 0x04
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#define FS_BLOCKDEVICE 0x08
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#define FS_PIPE 0x10
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#define FS_SYMLINK 0x20
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#define FS_MOUNTPOINT 0x40
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#define _IFMT 0170000 /* type of file */
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#define _IFDIR 0040000 /* directory */
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#define _IFCHR 0020000 /* character special */
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#define _IFBLK 0060000 /* block special */
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#define _IFREG 0100000 /* regular */
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#define _IFLNK 0120000 /* symbolic link */
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#define _IFSOCK 0140000 /* socket */
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#define _IFIFO 0010000 /* fifo */
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struct fs_node;
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typedef uint32_t (*read_type_t) (struct fs_node *, uint32_t, uint32_t, uint8_t *);
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typedef uint32_t (*write_type_t) (struct fs_node *, uint32_t, uint32_t, uint8_t *);
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typedef void (*open_type_t) (struct fs_node *, unsigned int flags);
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typedef void (*close_type_t) (struct fs_node *);
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typedef struct dirent *(*readdir_type_t) (struct fs_node *, uint32_t);
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typedef struct fs_node *(*finddir_type_t) (struct fs_node *, char *name);
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typedef void (*create_type_t) (struct fs_node *, char *name, uint16_t permission);
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typedef void (*unlink_type_t) (struct fs_node *, char *name);
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typedef void (*mkdir_type_t) (struct fs_node *, char *name, uint16_t permission);
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typedef int (*ioctl_type_t) (struct fs_node *, int request, void * argp);
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typedef int (*get_size_type_t) (struct fs_node *);
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typedef int (*chmod_type_t) (struct fs_node *, int mode);
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typedef struct fs_node {
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char name[256]; /* The filename. */
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void * device; /* Device object (optional) */
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uint32_t mask; /* The permissions mask. */
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uint32_t uid; /* The owning user. */
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uint32_t gid; /* The owning group. */
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uint32_t flags; /* Flags (node type, etc). */
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uint32_t inode; /* Inode number. */
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uint32_t length; /* Size of the file, in byte. */
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uint32_t impl; /* Used to keep track which fs it belongs to. */
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uint32_t open_flags; /* Flags passed to open (read/write/append, etc.) */
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/* times */
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uint32_t atime; /* Accessed */
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uint32_t mtime; /* Modified */
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uint32_t ctime; /* Created */
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/* File operations */
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read_type_t read;
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write_type_t write;
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open_type_t open;
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close_type_t close;
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readdir_type_t readdir;
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finddir_type_t finddir;
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create_type_t create;
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mkdir_type_t mkdir;
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ioctl_type_t ioctl;
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get_size_type_t get_size;
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chmod_type_t chmod;
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unlink_type_t unlink;
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struct fs_node *ptr; /* Alias pointer, for symlinks. */
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uint32_t offset; /* Offset for read operations XXX move this to new "file descriptor" entry */
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int32_t shared_with; /* File descriptor sharing XXX */
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} fs_node_t;
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struct dirent {
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uint32_t ino; /* Inode number. */
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char name[256]; /* The filename. */
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};
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struct stat {
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uint16_t st_dev;
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uint16_t st_ino;
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uint32_t st_mode;
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uint16_t st_nlink;
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uint16_t st_uid;
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uint16_t st_gid;
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uint16_t st_rdev;
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uint32_t st_size;
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uint32_t st_atime;
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uint32_t __unused1;
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uint32_t st_mtime;
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uint32_t __unused2;
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uint32_t st_ctime;
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uint32_t __unused3;
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};
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extern fs_node_t *fs_root;
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extern fs_node_t * null_device_create(void);
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extern fs_node_t * zero_device_create(void);
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extern fs_node_t * serial_device_create(int device);
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extern fs_node_t * procfs_create(void);
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extern fs_node_t * tmpfs_create(void);
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extern void serial_mount_devices(void);
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extern int openpty(int * master, int * slave, char * name, void * _ign0, void * size);
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extern fs_node_t * hello_device_create(void);
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extern fs_node_t * random_device_create(void);
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uint32_t read_fs(fs_node_t *node, uint32_t offset, uint32_t size, uint8_t *buffer);
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uint32_t write_fs(fs_node_t *node, uint32_t offset, uint32_t size, uint8_t *buffer);
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void open_fs(fs_node_t *node, unsigned int flags);
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void close_fs(fs_node_t *node);
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struct dirent *readdir_fs(fs_node_t *node, uint32_t index);
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fs_node_t *finddir_fs(fs_node_t *node, char *name);
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int mkdir_fs(char *name, uint16_t permission);
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int create_file_fs(char *name, uint16_t permission);
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fs_node_t *kopen(char *filename, uint32_t flags);
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char *canonicalize_path(char *cwd, char *input);
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fs_node_t *clone_fs(fs_node_t * source);
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int ioctl_fs(fs_node_t *node, int request, void * argp);
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int chmod_fs(fs_node_t *node, int mode);
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int unlink_fs(char * name);
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void vfs_install(void);
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int vfs_mount(char * path, fs_node_t * local_root);
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/* Debug purposes only, please */
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void debug_print_vfs_tree(void);
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#endif
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