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use core::{mem, slice};
use crate::data::*;
use crate::error::*;
use crate::flag::*;
use crate::number::*;
use crate::scheme::str_from_raw_parts;
pub trait Scheme {
fn handle(&self, packet: &mut Packet) {
let res = match packet.a {
SYS_OPEN => if let Some(path) = unsafe { str_from_raw_parts(packet.b as *const u8, packet.c) } {
self.open(path, packet.d, packet.uid, packet.gid)
} else {
Err(Error::new(EINVAL))
},
SYS_RMDIR => if let Some(path) = unsafe { str_from_raw_parts(packet.b as *const u8, packet.c) } {
self.rmdir(path, packet.uid, packet.gid)
} else {
Err(Error::new(EINVAL))
},
SYS_UNLINK => if let Some(path) = unsafe { str_from_raw_parts(packet.b as *const u8, packet.c) } {
self.unlink(path, packet.uid, packet.gid)
} else {
Err(Error::new(EINVAL))
},
SYS_DUP => self.dup(packet.b, unsafe { slice::from_raw_parts(packet.c as *const u8, packet.d) }),
SYS_READ => self.read(packet.b, unsafe { slice::from_raw_parts_mut(packet.c as *mut u8, packet.d) }),
SYS_WRITE => self.write(packet.b, unsafe { slice::from_raw_parts(packet.c as *const u8, packet.d) }),
SYS_LSEEK => self.seek(packet.b, packet.c as isize, packet.d).map(|o| o as usize),
SYS_FCHMOD => self.fchmod(packet.b, packet.c as u16),
SYS_FCHOWN => self.fchown(packet.b, packet.c as u32, packet.d as u32),
SYS_FCNTL => self.fcntl(packet.b, packet.c, packet.d),
SYS_FEVENT => self.fevent(packet.b, EventFlags::from_bits_truncate(packet.c)).map(|f| f.bits()),
SYS_FMAP_OLD => if packet.d >= mem::size_of::<OldMap>() {
self.fmap_old(packet.b, unsafe { &*(packet.c as *const OldMap) })
} else {
Err(Error::new(EFAULT))
},
SYS_FMAP => if packet.d >= mem::size_of::<Map>() {
self.fmap(packet.b, unsafe { &*(packet.c as *const Map) })
} else {
Err(Error::new(EFAULT))
},
SYS_FUNMAP_OLD => self.funmap_old(packet.b),
SYS_FUNMAP => self.funmap(packet.b, packet.c),
SYS_FPATH => self.fpath(packet.b, unsafe { slice::from_raw_parts_mut(packet.c as *mut u8, packet.d) }),
SYS_FRENAME => if let Some(path) = unsafe { str_from_raw_parts(packet.c as *const u8, packet.d) } {
self.frename(packet.b, path, packet.uid, packet.gid)
} else {
Err(Error::new(EINVAL))
},
SYS_FSTAT => if packet.d >= mem::size_of::<Stat>() {
self.fstat(packet.b, unsafe { &mut *(packet.c as *mut Stat) })
} else {
Err(Error::new(EFAULT))
},
SYS_FSTATVFS => if packet.d >= mem::size_of::<StatVfs>() {
self.fstatvfs(packet.b, unsafe { &mut *(packet.c as *mut StatVfs) })
} else {
Err(Error::new(EFAULT))
},
SYS_FSYNC => self.fsync(packet.b),
SYS_FTRUNCATE => self.ftruncate(packet.b, packet.c),
SYS_FUTIMENS => if packet.d >= mem::size_of::<TimeSpec>() {
self.futimens(packet.b, unsafe { slice::from_raw_parts(packet.c as *const TimeSpec, packet.d / mem::size_of::<TimeSpec>()) })
} else {
Err(Error::new(EFAULT))
},
SYS_CLOSE => self.close(packet.b),
_ => Err(Error::new(ENOSYS))
};
packet.a = Error::mux(res);
}
/* Scheme operations */
#[allow(unused_variables)]
fn open(&self, path: &str, flags: usize, uid: u32, gid: u32) -> Result<usize> {
Err(Error::new(ENOENT))
}
#[allow(unused_variables)]
fn chmod(&self, path: &str, mode: u16, uid: u32, gid: u32) -> Result<usize> {
Err(Error::new(ENOENT))
}
#[allow(unused_variables)]
fn rmdir(&self, path: &str, uid: u32, gid: u32) -> Result<usize> {
Err(Error::new(ENOENT))
}
#[allow(unused_variables)]
fn unlink(&self, path: &str, uid: u32, gid: u32) -> Result<usize> {
Err(Error::new(ENOENT))
}
/* Resource operations */
#[allow(unused_variables)]
fn dup(&self, old_id: usize, buf: &[u8]) -> Result<usize> {
Err(Error::new(EBADF))
}
#[allow(unused_variables)]
fn read(&self, id: usize, buf: &mut [u8]) -> Result<usize> {
Err(Error::new(EBADF))
}
#[allow(unused_variables)]
fn write(&self, id: usize, buf: &[u8]) -> Result<usize> {
Err(Error::new(EBADF))
}
#[allow(unused_variables)]
fn seek(&self, id: usize, pos: isize, whence: usize) -> Result<isize> {
Err(Error::new(EBADF))
}
#[allow(unused_variables)]
fn fchmod(&self, id: usize, mode: u16) -> Result<usize> {
Err(Error::new(EBADF))
}
#[allow(unused_variables)]
fn fchown(&self, id: usize, uid: u32, gid: u32) -> Result<usize> {
Err(Error::new(EBADF))
}
#[allow(unused_variables)]
fn fcntl(&self, id: usize, cmd: usize, arg: usize) -> Result<usize> {
Err(Error::new(EBADF))
}
#[allow(unused_variables)]
fn fevent(&self, id: usize, flags: EventFlags) -> Result<EventFlags> {
Err(Error::new(EBADF))
}
#[allow(unused_variables)]
fn fmap_old(&self, id: usize, map: &OldMap) -> Result<usize> {
Err(Error::new(EBADF))
}
#[allow(unused_variables)]
fn fmap(&self, id: usize, map: &Map) -> Result<usize> {
if map.flags.contains(MapFlags::MAP_FIXED) {
return Err(Error::new(EINVAL));
}
self.fmap_old(id, &OldMap {
offset: map.offset,
size: map.size,
flags: map.flags,
})
}
#[allow(unused_variables)]
fn funmap_old(&self, address: usize) -> Result<usize> {
Ok(0)
}
#[allow(unused_variables)]
fn funmap(&self, address: usize, length: usize) -> Result<usize> {
Ok(0)
}
#[allow(unused_variables)]
fn fpath(&self, id: usize, buf: &mut [u8]) -> Result<usize> {
Err(Error::new(EBADF))
}
#[allow(unused_variables)]
fn frename(&self, id: usize, path: &str, uid: u32, gid: u32) -> Result<usize> {
Err(Error::new(EBADF))
}
#[allow(unused_variables)]
fn fstat(&self, id: usize, stat: &mut Stat) -> Result<usize> {
Err(Error::new(EBADF))
}
#[allow(unused_variables)]
fn fstatvfs(&self, id: usize, stat: &mut StatVfs) -> Result<usize> {
Err(Error::new(EBADF))
}
#[allow(unused_variables)]
fn fsync(&self, id: usize) -> Result<usize> {
Err(Error::new(EBADF))
}
#[allow(unused_variables)]
fn ftruncate(&self, id: usize, len: usize) -> Result<usize> {
Err(Error::new(EBADF))
}
#[allow(unused_variables)]
fn futimens(&self, id: usize, times: &[TimeSpec]) -> Result<usize> {
Err(Error::new(EBADF))
}
#[allow(unused_variables)]
fn close(&self, id: usize) -> Result<usize> {
Err(Error::new(EBADF))
}
}
|
