The big problem of MIT license is that the companies love take the project and close it or not colaborate in the main or parent project. Because MIT license has not the "Freedom 3: The freedom to improve the program, and release your improvements (and modified versions in general) to the public, so that the whole community benefits." .

There are a lot of links about this:

• https://www.lesinskis.com/MIT-licence-community-hostile.html
• https://www.gnu.org/philosophy/open-source-misses-the-point.en.html
• https://www.quora.com/What-are-the-key-differences-between-the-GNU-General-Public-license-and-the-MIT-License

IMHO: GPLv3 is better.

Summary

it's better to merge this ext2 library once it got a MVP feature like

tasklist

• [ ] defined struct
• [ ] try to read super block ... to be continue🤔

This PR works towards resolving #74.

Checklist Towards Completion

• [x] Complete function to handle interrupts
• [x] Handle PCI and MMIO
• [x] Enable block device from qemu side
• [x] Register Device
  • [x] Resolve kernel panic upon block driver initialization
• [ ] Ensure Driver works

Github is nice and all for posting issues, but perhaps this project would benefit from a community chatroom somewhere?

I know I'd like to dive in and hack at a system call or two, but the real-time collaboration a chatroom could provide would help immensely.

I'd prefer a Discord server myself, but I'm amicable to anything really. Whatever it is, I think it's something @nuta should start to avoid any conflicts of interest :-)

It looks like I have encountered the limitation of grpc transfer file size, But I can't find where I can set this value.

     BUILD  testing
[+] Building 3.6s (17/42)
 => [internal] load build definition from Dockerfile                                                               0.0s
 => => transferring dockerfile: 32B                                                                                0.0s
 => [internal] load .dockerignore                                                                                  0.0s
 => => transferring context: 2B                                                                                    0.0s
 => [internal] load metadata for docker.io/library/ubuntu:20.04                                                    0.0s
 => [internal] load build context                                                                                  0.0s
 => => transferring context: 536B                                                                                  0.0s
 => [curl 1/8] FROM docker.io/library/ubuntu:20.04                                                                 0.0s
 => CACHED [curl 2/8] RUN apt-get update && apt-get install -qy build-essential curl sed                           0.0s
 => CACHED [curl 3/8] RUN apt-get install -qy musl-tools                                                           0.0s
 => CACHED [dropbear 4/11] RUN curl -fsSL --output tarball.tar.bz2 "https://matt.ucc.asn.au/dropbear/releases/dro  0.0s
 => CACHED [dropbear 5/11] RUN mkdir /build && tar xf tarball.tar.bz2 --strip-components=1 -C /build               0.0s
 => CACHED [dropbear 6/11] ADD dropbear/accept-empty-password-root-login.patch /build/accept-empty-password-root-  0.0s
 => CACHED [dropbear 7/11] ADD dropbear/localoptions.h /build/localoptions.h                                       0.0s
 => CACHED [dropbear 8/11] WORKDIR /build                                                                          0.0s
 => CACHED [dropbear 9/11] RUN sh -c 'patch --ignore-whitespace -p1 < accept-empty-password-root-login.patch'      0.0s
 => [dropbear 10/11] RUN ./configure CC=musl-gcc --enable-static --disable-largefile --disable-zlib --disable-sys  3.5s
 => => # checking for endutent... yes
 => => # checking for getutent... yes
 => => # checking for getutid... yes
 => => # checking for getutline... yes
 => => # checking for pututline... yes
 => => # checking for setutent... yes
 => CACHED [busybox 4/8] RUN curl -fsSL --output tarball.tar.bz2 "https://busybox.net/downloads/busybox-1.31.1.ta  0.0s
 => CACHED [busybox 5/8] RUN mkdir /build && tar xf tarball.tar.bz2 --strip-components=1 -C /build                 0.0s
 => CACHED [busybox 6/8] WORKDIR /build                                                                            0.0s
 => CACHED [busybox 7/8] ADD busybox/config /build/.config                                                         0.0s
 => [busybox 8/8] RUN yes n | make oldconfig     && ln -s /usr/bin/ar /usr/bin/musl-ar     && ln -s /usr/bin/stri  3.5s
 => => # ) [6] (NEW) Minimum password length (PASSWORD_MINLEN) [6] (NEW) Minimum password length (PASSWORD_MINLEN) [6]
 => => # (NEW) Minimum password length (PASSWORD_MINLEN) [6] (NEW) Minimum password length (PASSWORD_MINLEN) [6] (NEW)
 => => # Minimum password length (PASSWORD_MINLEN) [6] (NEW) Minimum password length (PASSWORD_MINLEN) [6] (NEW) Minimu
 => => # m password length (PASSWORD_MINLEN) [6] (NEW) Minimum password length (PASSWORD_MINLEN) [6] (NEW) Minimum pass
 => => # word length (PASSWORD_MINLEN) [6] (NEW) Minimum password length (PASSWORD_MINLEN) [6] (NEW) Minimum password l
 => => # ength (PASSWORD_MINLEN) [6] (NEW) Minimum password length (PASSWORD_MINLEN) [6] (NEW)
failed to receive status: rpc error: code = ResourceExhausted desc = grpc: received message larger than max (5417870 vs. 4194304)
make[2]: *** [Makefile:193: build/kerla.initramfs] Error 1
make[1]: *** [Makefile:92: build-crate] Error 2
make: *** [Makefile:78: build] Error 2

I followed the steps of quickstart.md to try to compile and run from the source code. When I executed make run, I got an error:

sorry, I personally don’t know how to solve it, so I created this issues.

Vesion python 3.9.7 rustc 1.58.0-nightly

OS Version:

To deal with discussions of Contracts/Documentations for rights of other people who fork the code in https://github.com/nuta/kerla/issues/5 & proposed changes in https://github.com/nuta/kerla/issues/99

Closes #99 & #5

Fixes #50

In this PR we introduce struct IrqHandler.

struct IrqHandler {
    callback: Box<dyn FnMut() + Send + Sync>,
    attached: bool,
}

Right now there is only one ancillary field - attached, which allows an "overwrite" check. But potentially opens the way to build something like /proc/interrupts.

This pull request adds rt_sigprocmask syscall handler (https://man7.org/linux/man-pages/man2/sigprocmask.2.html).

Before adding signal filtering, I want to discuss the general approach.

Things that bother me:

I feel like the how argument should be an enum, but how to handle EINVAL in that case?

And the length argument doesn't make any sense to me. According to the manual, it is sizeof(kernel_sigset_t), and according to kernel sources, kernel_sigset_t is 1024 bits. So it always, according to POSIX, should be 128 bytes, unless we will run on something exotic like PDP-6/10 or DSP. If you can point me to some document or discussion to make sense of it, I would be grateful.

Also set and oldset are 1024 bits in length. I am using a slightly modified BitMap from kerla_utils, but it is suboptimal. It is [u8;128], which means we have 128 iterations on SIG_BLOCK and SIG_UNBLOCK. The solution can be generic over the type BitMap. Or create a new LongBitMap, which will use u128 under the hood. Or, maybe we can use or take inspiration from something like https://docs.rs/bitmaps/latest/bitmaps/. But I have a feeling that this is a task by itself, and should be discussed in a separate issue/PR.

hey @nuta team so I am facing this issue

     CARGO  kernel
error: no such subcommand: `+nightly`
make[1]: *** [build-crate] Error 101
make: *** [build] Error 2

any ideas on fixing this issue?? pls help me

I'm using archlinux and I installed the cargo and rustup dependencies , and docker,qemu,python3,gdb

and I'm getting this error

warning: kerla (bin "kerla") generated 9 warnings (1 duplicate) Finished dev [unoptimized + debuginfo] target(s) in 2.11s make[1]: Leaving directory '/home/coolpp/github/kerla' NM kerla.x64.symbols /bin/sh: line 1: rust-nm: command not found /bin/sh: line 1: rustfilt: command not found SYMBOLS kerla.x64.elf STRIP kerla.x64.stripped.elf make: rust-strip: No such file or directory make: *** [Makefile:67: build] Error 127

Description

An unfinished attempt to add lifetimes to VAddr & PAddr (as per #142).

@nuta I stuck with:

error[E0308]: mismatched types
   --> runtime/backtrace.rs:113:56
    |
113 |         Backtrace::current_frame().traverse(|_, vaddr: VAddr<'memory>| {
    |                                                        ^^^^^^^^^^^^^^ lifetime mismatch
    |
    = note: expected struct `address::VAddr<'_>`
               found struct `address::VAddr<'memory>`
note: the anonymous lifetime #1 defined here...
   --> runtime/backtrace.rs:113:45
    |
113 |           Backtrace::current_frame().traverse(|_, vaddr: VAddr<'memory>| {
    |  _____________________________________________^
114 | |             if let Some(symbol) = resolve_symbol(vaddr) {
115 | |                 let _ = trace.try_push(CapturedBacktraceFrame::<'memory> {
116 | |                     vaddr,
...   |
120 | |             }
121 | |         });
    | |_________^
note: ...does not necessarily outlive the lifetime `'memory` as defined here
   --> runtime/backtrace.rs:111:43
    |
111 |     pub fn capture() -> CapturedBacktrace<'memory> {
    |                                           ^^^^^^^

I'm not the expert of lifetimes, but I read this a problem with the lifetime of the closure as argument of traverse(). Any suggestions welcome.

Pre-Submission Checklist

When you submit a PR, please make sure your PR satisfies the following checklist:

• [X] I assert this contribution was authored by me.
• [X] I license this contribution under the license of this project.
• [X] The PR title describes your changes briefly and uses the present tense, without a trailing full stop.
• [X] The PR description describes the reason why we need the change.
• [X] This is an isolated change. No multiple changes and no unrelated changes are included.
• [ ] Fixed all cargo clippy warnings.
• [ ] Applied rustfmt.

In #141, I noticed that we need to track the lifetime of a PAddr object which references to OwnedPages. It's problematic because it lead to memory leaks or nasty use-after-free bugs. In this issue, I'll replace PAddr and VAddr as:

#[repr(transparent)]
pub struct PAddr<'a> {
    value: usize,
    _pd: PhantomData<&'a ()>,
}

This is draft for bringing in resolution for #88. The whole work is pretty complex, so probably would need to be split into pieces. I already defined a few things to fix first for get this any further.

I don't have much time to work on it, but I'll tray to add bits into it as time allows. Till then please look and comment.

Any input appreciated.

Currently, a symbol table reserves 2MiB space to store symbols (e.g. function names) of the kernel. Because symbols in Rust tend to be lengthy, they are truncated to 55 characters.

This issue aims to implement a simple symbol table compression to:

• Decrease the kernel image size.
• Print the whole symbol name (avoid truncating).

At the moment Process::fork() seem to clone the Arc<RootFs> instead of content of the RootFs itself, what leads to shared RootFs between processes, not independent file system states.

Found during work on #88 and belongs to Multithreading milestone (I can't add myself).

More details in the flags mask of clone(2), scroll down to CLONE_FS. I haven't checked yet how it's implemented in Linux Kernel.