|
|
//! C Interfaces for ucore
|
|
|
|
|
|
/// Abstract low-level file.
|
|
|
///
|
|
|
/// Match struct `inode` in ucore `kern/fs/vfs/inode.h`
|
|
|
#[repr(C)]
|
|
|
struct INode {
|
|
|
// TODO: full the struct
|
|
|
}
|
|
|
|
|
|
/// A buffer Rd/Wr status record
|
|
|
///
|
|
|
/// Match struct `iobuf` in ucore `kern/fs/iobuf.h`
|
|
|
#[repr(C)]
|
|
|
struct IoBuf {
|
|
|
/// the base addr of buffer (used for Rd/Wr)
|
|
|
base: *mut u8,
|
|
|
/// current Rd/Wr position in buffer, will have been incremented by the amount transferred
|
|
|
offset: i32,
|
|
|
/// the length of buffer (used for Rd/Wr)
|
|
|
len: u32,
|
|
|
/// current resident length need to Rd/Wr, will have been decremented by the amount transferred.
|
|
|
resident: u32,
|
|
|
}
|
|
|
|
|
|
/// Information about a file
|
|
|
///
|
|
|
/// Match struct `stat` in ucore `libs/stat.h`
|
|
|
#[repr(C)]
|
|
|
struct Stat {
|
|
|
/// protection mode and file type
|
|
|
mode: u32,
|
|
|
/// number of hard links
|
|
|
nlinks: u32,
|
|
|
/// number of blocks file is using
|
|
|
blocks: u32,
|
|
|
/// file size (bytes)
|
|
|
size: u32,
|
|
|
}
|
|
|
|
|
|
const S_IFMT : u32 = 070000; // mask for type of file
|
|
|
const S_IFREG: u32 = 010000; // ordinary regular file
|
|
|
const S_IFDIR: u32 = 020000; // directory
|
|
|
const S_IFLNK: u32 = 030000; // symbolic link
|
|
|
const S_IFCHR: u32 = 040000; // character device
|
|
|
const S_IFBLK: u32 = 050000; // block device
|
|
|
|
|
|
/// Abstract operations on a inode.
|
|
|
///
|
|
|
/// Match struct `inode_ops` in ucore `kern/fs/vfs/inode.h`
|
|
|
// TODO: Append docs from ucore
|
|
|
#[repr(C)]
|
|
|
struct INodeOps {
|
|
|
magic: u64,
|
|
|
open: extern fn(*mut INode, flags: u32) -> i32,
|
|
|
close: extern fn(*mut INode) -> i32,
|
|
|
read: extern fn(*mut INode, *mut IoBuf) -> i32,
|
|
|
write: extern fn(*mut INode, *mut IoBuf) -> i32,
|
|
|
fstat: extern fn(*mut INode, *mut Stat) -> i32,
|
|
|
fsync: extern fn(*mut INode) -> i32,
|
|
|
namefile: extern fn(*mut INode, *mut IoBuf) -> i32,
|
|
|
getdirentry: extern fn(*mut INode, *mut IoBuf) -> i32,
|
|
|
reclaim: extern fn(*mut INode) -> i32,
|
|
|
gettype: extern fn(*mut INode, type_store: *mut u32) -> i32,
|
|
|
tryseek: extern fn(*mut INode, pos: i32) -> i32,
|
|
|
truncate: extern fn(*mut INode, len: i32) -> i32,
|
|
|
create: extern fn(*mut INode, name: *const u8, excl: bool, inode_store: *mut *mut INode) -> i32,
|
|
|
lookup: extern fn(*mut INode, path: *mut u8, inode_store: *mut *mut INode) -> i32,
|
|
|
ioctl: extern fn(*mut INode, op: i32, data: *mut u8) -> i32,
|
|
|
} |
