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feat(storage): full file protocol over per-client shared region (badged clients, owned handles, clamped lengths, ReadOnly on unwritable disk); init loads via libkos::fs; drop boot shared buffer

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This commit is contained in:
Gabriel Kaszewski
2026-10-27 12:42:37 +01:00
parent 694c675a40
commit 909b3f0503
19 changed files with 827 additions and 506 deletions
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28
crates/adapter-riscv/src/devices/mod.rs
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@@ -1,12 +1,13 @@
// What boot still sets up for userspace, all through the kernel's mapping
// API: a buffer init and storage share, the display's page quota, and the
// BootInfo page that tells init where its device capabilities are. Drivers
// set up their own devices with the capabilities init hands them.
// API: the display's page quota and the BootInfo page that tells init
// where its device capabilities are. Drivers set up their own devices
// with the capabilities init hands them; processes share memory through
// regions they create.
use crate::hw::uart::Uart;
use types::address::VirtualAddress;
use types::bootinfo::{BOOT_INFO_VA, BootDevice, BootInfo, MAGIC, MAX_BOOT_DEVICES, NO_SLOT};
use types::bounded::{CapSlot, PageCount};
use types::bounded::CapSlot;
use types::id::ProcessId;
use types::mapping::PagePerms;
@@ -17,25 +18,6 @@ fn kern() -> &'static mut kernel::Kernel<crate::platform::RiscVPlatform> {
unsafe { &mut *crate::kernel_ptr() }
}
fn pages(uart: &Uart, n: usize) -> PageCount {
u16::try_from(n)
.ok()
.and_then(PageCount::new)
.unwrap_or_else(|| crate::halt(uart, "bad page count"))
}
/// Shares a fresh region between `owner` and `other` at the same `va`.
pub(crate) fn shared_buffer(uart: &Uart, owner: ProcessId, other: ProcessId, va: usize, n: usize) {
let id = kern()
.create_pool_region(owner, pages(uart, n))
.unwrap_or_else(|_| crate::halt(uart, "shared region failed"));
for pid in [owner, other] {
kern()
.map_region(id, pid, VirtualAddress::from_raw(va), PagePerms::ReadWrite)
.unwrap_or_else(|_| crate::halt(uart, "shared map failed"));
}
}
/// Lets the display server hold a framebuffer.
pub(crate) fn display_quota(uart: &Uart, display: ProcessId) {
kern()