use core::{mem, slice};
use crate::{data::*, error::*, flag::*, number::*, scheme::*, CallerCtx, OpenResult};
pub trait SchemeBlock {
fn handle(&self, packet: &Packet) -> Option<usize> {
let res = match packet.a {
SYS_OPEN => {
if let Some(path) = unsafe { str_from_raw_parts(packet.b as *const u8, packet.c) } {
convert_in_scheme_handle_block(
packet,
self.xopen(path, packet.d, &CallerCtx::from_packet(&packet)),
)
} 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 => convert_in_scheme_handle_block(
packet,
self.xdup(
packet.b,
unsafe { slice::from_raw_parts(packet.c as *const u8, packet.d) },
&CallerCtx::from_packet(&packet),
),
),
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.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.map(|f| f.bits())),
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),
KSMSG_MMAP_PREP => self.mmap_prep(
packet.b,
u64::from(packet.uid) | (u64::from(packet.gid) << 32),
packet.c,
MapFlags::from_bits_truncate(packet.d),
),
KSMSG_MUNMAP => self.munmap(
packet.b,
u64::from(packet.uid) | (u64::from(packet.gid) << 32),
packet.c,
MunmapFlags::from_bits_truncate(packet.d),
),
_ => Err(Error::new(ENOSYS)),
};
res.transpose().map(Error::mux)
}
#[allow(unused_variables)]
fn open(&self, path: &str, flags: usize, uid: u32, gid: u32) -> Result<Option<usize>> {
Err(Error::new(ENOENT))
}
#[allow(unused_variables)]
fn xopen(&self, path: &str, flags: usize, ctx: &CallerCtx) -> Result<Option<OpenResult>> {
convert_to_this_scheme_block(self.open(path, flags, ctx.uid, ctx.gid))
}
#[allow(unused_variables)]
fn chmod(&self, path: &str, mode: u16, uid: u32, gid: u32) -> Result<Option<usize>> {
Err(Error::new(ENOENT))
}
#[allow(unused_variables)]
fn rmdir(&self, path: &str, uid: u32, gid: u32) -> Result<Option<usize>> {
Err(Error::new(ENOENT))
}
#[allow(unused_variables)]
fn unlink(&self, path: &str, uid: u32, gid: u32) -> Result<Option<usize>> {
Err(Error::new(ENOENT))
}
#[allow(unused_variables)]
fn dup(&self, old_id: usize, buf: &[u8]) -> Result<Option<usize>> {
Err(Error::new(EBADF))
}
#[allow(unused_variables)]
fn xdup(&self, old_id: usize, buf: &[u8], ctx: &CallerCtx) -> Result<Option<OpenResult>> {
convert_to_this_scheme_block(self.dup(old_id, buf))
}
#[allow(unused_variables)]
fn read(&self, id: usize, buf: &mut [u8]) -> Result<Option<usize>> {
Err(Error::new(EBADF))
}
#[allow(unused_variables)]
fn write(&self, id: usize, buf: &[u8]) -> Result<Option<usize>> {
Err(Error::new(EBADF))
}
#[allow(unused_variables)]
fn seek(&self, id: usize, pos: isize, whence: usize) -> Result<Option<isize>> {
Err(Error::new(EBADF))
}
#[allow(unused_variables)]
fn fchmod(&self, id: usize, mode: u16) -> Result<Option<usize>> {
Err(Error::new(EBADF))
}
#[allow(unused_variables)]
fn fchown(&self, id: usize, uid: u32, gid: u32) -> Result<Option<usize>> {
Err(Error::new(EBADF))
}
#[allow(unused_variables)]
fn fcntl(&self, id: usize, cmd: usize, arg: usize) -> Result<Option<usize>> {
Err(Error::new(EBADF))
}
#[allow(unused_variables)]
fn fevent(&self, id: usize, flags: EventFlags) -> Result<Option<EventFlags>> {
Err(Error::new(EBADF))
}
#[allow(unused_variables)]
fn fpath(&self, id: usize, buf: &mut [u8]) -> Result<Option<usize>> {
Err(Error::new(EBADF))
}
#[allow(unused_variables)]
fn frename(&self, id: usize, path: &str, uid: u32, gid: u32) -> Result<Option<usize>> {
Err(Error::new(EBADF))
}
#[allow(unused_variables)]
fn fstat(&self, id: usize, stat: &mut Stat) -> Result<Option<usize>> {
Err(Error::new(EBADF))
}
#[allow(unused_variables)]
fn fstatvfs(&self, id: usize, stat: &mut StatVfs) -> Result<Option<usize>> {
Err(Error::new(EBADF))
}
#[allow(unused_variables)]
fn fsync(&self, id: usize) -> Result<Option<usize>> {
Err(Error::new(EBADF))
}
#[allow(unused_variables)]
fn ftruncate(&self, id: usize, len: usize) -> Result<Option<usize>> {
Err(Error::new(EBADF))
}
#[allow(unused_variables)]
fn futimens(&self, id: usize, times: &[TimeSpec]) -> Result<Option<usize>> {
Err(Error::new(EBADF))
}
#[allow(unused_variables)]
fn close(&self, id: usize) -> Result<Option<usize>> {
Err(Error::new(EBADF))
}
#[allow(unused_variables)]
fn mmap_prep(
&self,
id: usize,
offset: u64,
size: usize,
flags: MapFlags,
) -> Result<Option<usize>> {
Err(Error::new(EOPNOTSUPP))
}
#[allow(unused_variables)]
fn munmap(
&self,
id: usize,
offset: u64,
size: usize,
flags: MunmapFlags,
) -> Result<Option<usize>> {
Err(Error::new(EOPNOTSUPP))
}
}