vasilito
b9874d0941
Add redbear-usb-storage-check in-guest binary that validates USB mass storage read and write I/O: discovers /scheme/disk/ devices, writes a test pattern to sector 2048, reads it back, verifies match, restores original content. Updates test-usb-storage-qemu.sh with write-proof verification step. Includes all accumulated Red Bear OS work: kernel patches, relibc patches, driver infrastructure, DRM/GPU, KDE recipes, firmware, validation tooling, build system hardening, and documentation.
58 lines
1.4 KiB
Rust
58 lines
1.4 KiB
Rust
use scroll::{Pread, Pwrite};
|
|
use std::io::{self, Read, Seek};
|
|
|
|
#[derive(Clone, Copy, Debug, Pread, Pwrite)]
|
|
pub(crate) struct Entry {
|
|
pub(crate) drive_attrs: u8,
|
|
pub(crate) start_head: u8,
|
|
pub(crate) start_cs: u16,
|
|
pub(crate) sys_id: u8,
|
|
pub(crate) end_head: u8,
|
|
pub(crate) end_cs: u16,
|
|
pub(crate) rel_sector: u32,
|
|
pub(crate) len: u32,
|
|
}
|
|
|
|
#[derive(Pread, Pwrite)]
|
|
pub(crate) struct Header {
|
|
pub(crate) bootstrap: [u8; 446],
|
|
pub(crate) first_entry: Entry,
|
|
pub(crate) second_entry: Entry,
|
|
pub(crate) third_entry: Entry,
|
|
pub(crate) fourth_entry: Entry,
|
|
pub(crate) last_signature: u16, // 0xAA55
|
|
}
|
|
|
|
pub(crate) fn read_header<D: Read + Seek>(device: &mut D) -> io::Result<Option<Header>> {
|
|
device.seek(io::SeekFrom::Start(0))?;
|
|
|
|
let mut bytes = [0u8; 512];
|
|
device.read_exact(&mut bytes)?;
|
|
|
|
let header: Header = bytes.pread_with(0, scroll::LE).unwrap();
|
|
|
|
if header.last_signature != 0xAA55 {
|
|
return Ok(None);
|
|
}
|
|
|
|
Ok(Some(header))
|
|
}
|
|
|
|
impl Header {
|
|
pub(crate) fn partitions(&self) -> impl Iterator<Item = Entry> {
|
|
[
|
|
self.first_entry,
|
|
self.second_entry,
|
|
self.third_entry,
|
|
self.fourth_entry,
|
|
]
|
|
.into_iter()
|
|
.filter(Entry::is_valid)
|
|
}
|
|
}
|
|
impl Entry {
|
|
fn is_valid(&self) -> bool {
|
|
(self.drive_attrs == 0 || self.drive_attrs == 0x80) && self.len != 0
|
|
}
|
|
}
|