1 use core::{mem, slice}; 2 3 use crate::data::*; 4 use crate::error::*; 5 use crate::flag::*; 6 use crate::number::*; 7 use crate::scheme::str_from_raw_parts; 8 9 pub trait Scheme { handle(&self, packet: &mut Packet)10 fn handle(&self, packet: &mut Packet) { 11 let res = match packet.a { 12 SYS_OPEN => if let Some(path) = unsafe { str_from_raw_parts(packet.b as *const u8, packet.c) } { 13 self.open(path, packet.d, packet.uid, packet.gid) 14 } else { 15 Err(Error::new(EINVAL)) 16 }, 17 SYS_CHMOD => if let Some(path) = unsafe { str_from_raw_parts(packet.b as *const u8, packet.c) } { 18 self.chmod(path, packet.d as u16, packet.uid, packet.gid) 19 } else { 20 Err(Error::new(EINVAL)) 21 }, 22 SYS_RMDIR => if let Some(path) = unsafe { str_from_raw_parts(packet.b as *const u8, packet.c) } { 23 self.rmdir(path, packet.uid, packet.gid) 24 } else { 25 Err(Error::new(EINVAL)) 26 }, 27 SYS_UNLINK => if let Some(path) = unsafe { str_from_raw_parts(packet.b as *const u8, packet.c) } { 28 self.unlink(path, packet.uid, packet.gid) 29 } else { 30 Err(Error::new(EINVAL)) 31 }, 32 33 SYS_DUP => self.dup(packet.b, unsafe { slice::from_raw_parts(packet.c as *const u8, packet.d) }), 34 SYS_READ => self.read(packet.b, unsafe { slice::from_raw_parts_mut(packet.c as *mut u8, packet.d) }), 35 SYS_WRITE => self.write(packet.b, unsafe { slice::from_raw_parts(packet.c as *const u8, packet.d) }), 36 SYS_LSEEK => self.seek(packet.b, packet.c as isize, packet.d).map(|o| o as usize), 37 SYS_FCHMOD => self.fchmod(packet.b, packet.c as u16), 38 SYS_FCHOWN => self.fchown(packet.b, packet.c as u32, packet.d as u32), 39 SYS_FCNTL => self.fcntl(packet.b, packet.c, packet.d), 40 SYS_FEVENT => self.fevent(packet.b, EventFlags::from_bits_truncate(packet.c)).map(|f| f.bits()), 41 SYS_FMAP_OLD => if packet.d >= mem::size_of::<OldMap>() { 42 self.fmap_old(packet.b, unsafe { &*(packet.c as *const OldMap) }) 43 } else { 44 Err(Error::new(EFAULT)) 45 }, 46 SYS_FMAP => if packet.d >= mem::size_of::<Map>() { 47 self.fmap(packet.b, unsafe { &*(packet.c as *const Map) }) 48 } else { 49 Err(Error::new(EFAULT)) 50 }, 51 SYS_FUNMAP_OLD => self.funmap_old(packet.b), 52 SYS_FUNMAP => self.funmap(packet.b, packet.c), 53 SYS_FPATH => self.fpath(packet.b, unsafe { slice::from_raw_parts_mut(packet.c as *mut u8, packet.d) }), 54 SYS_FRENAME => if let Some(path) = unsafe { str_from_raw_parts(packet.c as *const u8, packet.d) } { 55 self.frename(packet.b, path, packet.uid, packet.gid) 56 } else { 57 Err(Error::new(EINVAL)) 58 }, 59 SYS_FSTAT => if packet.d >= mem::size_of::<Stat>() { 60 self.fstat(packet.b, unsafe { &mut *(packet.c as *mut Stat) }) 61 } else { 62 Err(Error::new(EFAULT)) 63 }, 64 SYS_FSTATVFS => if packet.d >= mem::size_of::<StatVfs>() { 65 self.fstatvfs(packet.b, unsafe { &mut *(packet.c as *mut StatVfs) }) 66 } else { 67 Err(Error::new(EFAULT)) 68 }, 69 SYS_FSYNC => self.fsync(packet.b), 70 SYS_FTRUNCATE => self.ftruncate(packet.b, packet.c), 71 SYS_FUTIMENS => if packet.d >= mem::size_of::<TimeSpec>() { 72 self.futimens(packet.b, unsafe { slice::from_raw_parts(packet.c as *const TimeSpec, packet.d / mem::size_of::<TimeSpec>()) }) 73 } else { 74 Err(Error::new(EFAULT)) 75 }, 76 SYS_CLOSE => self.close(packet.b), 77 _ => Err(Error::new(ENOSYS)) 78 }; 79 80 packet.a = Error::mux(res); 81 } 82 83 /* Scheme operations */ 84 85 #[allow(unused_variables)] open(&self, path: &str, flags: usize, uid: u32, gid: u32) -> Result<usize>86 fn open(&self, path: &str, flags: usize, uid: u32, gid: u32) -> Result<usize> { 87 Err(Error::new(ENOENT)) 88 } 89 90 #[allow(unused_variables)] chmod(&self, path: &str, mode: u16, uid: u32, gid: u32) -> Result<usize>91 fn chmod(&self, path: &str, mode: u16, uid: u32, gid: u32) -> Result<usize> { 92 Err(Error::new(ENOENT)) 93 } 94 95 #[allow(unused_variables)] rmdir(&self, path: &str, uid: u32, gid: u32) -> Result<usize>96 fn rmdir(&self, path: &str, uid: u32, gid: u32) -> Result<usize> { 97 Err(Error::new(ENOENT)) 98 } 99 100 #[allow(unused_variables)] unlink(&self, path: &str, uid: u32, gid: u32) -> Result<usize>101 fn unlink(&self, path: &str, uid: u32, gid: u32) -> Result<usize> { 102 Err(Error::new(ENOENT)) 103 } 104 105 /* Resource operations */ 106 #[allow(unused_variables)] dup(&self, old_id: usize, buf: &[u8]) -> Result<usize>107 fn dup(&self, old_id: usize, buf: &[u8]) -> Result<usize> { 108 Err(Error::new(EBADF)) 109 } 110 111 #[allow(unused_variables)] read(&self, id: usize, buf: &mut [u8]) -> Result<usize>112 fn read(&self, id: usize, buf: &mut [u8]) -> Result<usize> { 113 Err(Error::new(EBADF)) 114 } 115 116 #[allow(unused_variables)] write(&self, id: usize, buf: &[u8]) -> Result<usize>117 fn write(&self, id: usize, buf: &[u8]) -> Result<usize> { 118 Err(Error::new(EBADF)) 119 } 120 121 #[allow(unused_variables)] seek(&self, id: usize, pos: isize, whence: usize) -> Result<isize>122 fn seek(&self, id: usize, pos: isize, whence: usize) -> Result<isize> { 123 Err(Error::new(EBADF)) 124 } 125 126 #[allow(unused_variables)] fchmod(&self, id: usize, mode: u16) -> Result<usize>127 fn fchmod(&self, id: usize, mode: u16) -> Result<usize> { 128 Err(Error::new(EBADF)) 129 } 130 131 #[allow(unused_variables)] fchown(&self, id: usize, uid: u32, gid: u32) -> Result<usize>132 fn fchown(&self, id: usize, uid: u32, gid: u32) -> Result<usize> { 133 Err(Error::new(EBADF)) 134 } 135 136 #[allow(unused_variables)] fcntl(&self, id: usize, cmd: usize, arg: usize) -> Result<usize>137 fn fcntl(&self, id: usize, cmd: usize, arg: usize) -> Result<usize> { 138 Err(Error::new(EBADF)) 139 } 140 141 #[allow(unused_variables)] fevent(&self, id: usize, flags: EventFlags) -> Result<EventFlags>142 fn fevent(&self, id: usize, flags: EventFlags) -> Result<EventFlags> { 143 Err(Error::new(EBADF)) 144 } 145 146 #[allow(unused_variables)] fmap_old(&self, id: usize, map: &OldMap) -> Result<usize>147 fn fmap_old(&self, id: usize, map: &OldMap) -> Result<usize> { 148 Err(Error::new(EBADF)) 149 } 150 #[allow(unused_variables)] fmap(&self, id: usize, map: &Map) -> Result<usize>151 fn fmap(&self, id: usize, map: &Map) -> Result<usize> { 152 if map.flags.contains(MapFlags::MAP_FIXED) { 153 return Err(Error::new(EINVAL)); 154 } 155 self.fmap_old(id, &OldMap { 156 offset: map.offset, 157 size: map.size, 158 flags: map.flags, 159 }) 160 } 161 162 #[allow(unused_variables)] funmap_old(&self, address: usize) -> Result<usize>163 fn funmap_old(&self, address: usize) -> Result<usize> { 164 Ok(0) 165 } 166 167 #[allow(unused_variables)] funmap(&self, address: usize, length: usize) -> Result<usize>168 fn funmap(&self, address: usize, length: usize) -> Result<usize> { 169 Ok(0) 170 } 171 172 #[allow(unused_variables)] fpath(&self, id: usize, buf: &mut [u8]) -> Result<usize>173 fn fpath(&self, id: usize, buf: &mut [u8]) -> Result<usize> { 174 Err(Error::new(EBADF)) 175 } 176 177 #[allow(unused_variables)] frename(&self, id: usize, path: &str, uid: u32, gid: u32) -> Result<usize>178 fn frename(&self, id: usize, path: &str, uid: u32, gid: u32) -> Result<usize> { 179 Err(Error::new(EBADF)) 180 } 181 182 #[allow(unused_variables)] fstat(&self, id: usize, stat: &mut Stat) -> Result<usize>183 fn fstat(&self, id: usize, stat: &mut Stat) -> Result<usize> { 184 Err(Error::new(EBADF)) 185 } 186 187 #[allow(unused_variables)] fstatvfs(&self, id: usize, stat: &mut StatVfs) -> Result<usize>188 fn fstatvfs(&self, id: usize, stat: &mut StatVfs) -> Result<usize> { 189 Err(Error::new(EBADF)) 190 } 191 192 #[allow(unused_variables)] fsync(&self, id: usize) -> Result<usize>193 fn fsync(&self, id: usize) -> Result<usize> { 194 Err(Error::new(EBADF)) 195 } 196 197 #[allow(unused_variables)] ftruncate(&self, id: usize, len: usize) -> Result<usize>198 fn ftruncate(&self, id: usize, len: usize) -> Result<usize> { 199 Err(Error::new(EBADF)) 200 } 201 202 #[allow(unused_variables)] futimens(&self, id: usize, times: &[TimeSpec]) -> Result<usize>203 fn futimens(&self, id: usize, times: &[TimeSpec]) -> Result<usize> { 204 Err(Error::new(EBADF)) 205 } 206 207 #[allow(unused_variables)] close(&self, id: usize) -> Result<usize>208 fn close(&self, id: usize) -> Result<usize> { 209 Err(Error::new(EBADF)) 210 } 211 } 212