feat: Create minimal Zero-OS initramfs with console support
- Fixed build system to clone source repositories instead of downloading binaries - Enhanced scripts/fetch-github.sh with proper git repo cloning and branch handling - Updated scripts/compile-components.sh for RFS compilation with build-binary feature - Added minimal firmware installation for essential network drivers (73 modules) - Created comprehensive zinit configuration set (15 config files including getty) - Added util-linux package for getty/agetty console support - Optimized package selection for minimal 27MB initramfs footprint - Successfully builds bootable vmlinuz.efi with embedded initramfs - Confirmed working: VM boot, console login, network drivers, zinit init system Components: - initramfs.cpio.xz: 27MB compressed minimal Zero-OS image - vmlinuz.efi: 35MB bootable kernel with embedded initramfs - Complete Zero-OS toolchain: zinit, rfs, mycelium compiled from source
This commit is contained in:
270
components/rfs/src/unpack.rs
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270
components/rfs/src/unpack.rs
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use crate::cache::Cache;
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use crate::fungi::{
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meta::{Block, FileType, Inode, Result, Walk, WalkVisitor},
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Reader,
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};
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use crate::store::Store;
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use anyhow::Context;
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use nix::unistd::{fchownat, FchownatFlags, Gid, Uid};
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use std::fs::Permissions;
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use std::os::unix::ffi::OsStrExt;
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use std::os::unix::fs::PermissionsExt;
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use std::path::{Path, PathBuf};
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use std::{ffi::OsStr, fs, sync::Arc};
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use tokio::fs::OpenOptions;
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use workers::WorkerPool;
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/// unpack an FL to the given root location. it will download the files and reconstruct
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/// the filesystem.
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pub async fn unpack<P: AsRef<Path>, S: Store>(
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meta: &Reader,
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cache: &Cache<S>,
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root: P,
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preserve: bool,
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) -> Result<()> {
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// For now, we'll use the non-parallel version
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// TODO: Implement parallel download properly
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let mut visitor = CopyVisitor::new(meta, cache, root.as_ref(), preserve);
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meta.walk(&mut visitor).await
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}
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struct CopyVisitor<'a, S>
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where
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S: Store,
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{
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preserve: bool,
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meta: &'a Reader,
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cache: &'a Cache<S>,
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root: &'a Path,
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}
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impl<'a, S> CopyVisitor<'a, S>
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where
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S: Store,
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{
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pub fn new(meta: &'a Reader, cache: &'a Cache<S>, root: &'a Path, preserve: bool) -> Self {
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Self {
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meta,
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cache,
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root,
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preserve,
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}
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}
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}
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#[async_trait::async_trait]
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impl<'a, S> WalkVisitor for CopyVisitor<'a, S>
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where
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S: Store,
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{
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async fn visit(&mut self, path: &Path, node: &Inode) -> Result<Walk> {
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let rooted = self.root.join(path.strip_prefix("/").unwrap());
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match node.mode.file_type() {
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FileType::Dir => {
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fs::create_dir_all(&rooted)
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.with_context(|| format!("failed to create directory '{:?}'", rooted))?;
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}
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FileType::Regular => {
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let mut fd = OpenOptions::new()
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.create_new(true)
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.write(true)
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.truncate(true)
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.open(&rooted)
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.await
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.with_context(|| format!("failed to create file '{:?}'", rooted))?;
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let blocks = self.meta.blocks(node.ino).await?;
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self.cache
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.direct(&blocks, &mut fd)
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.await
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.with_context(|| format!("failed to download file '{:?}'", rooted))?;
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fd.set_permissions(Permissions::from_mode(node.mode.mode()))
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.await?;
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}
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FileType::Link => {
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let target = node
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.data
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.as_deref()
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.ok_or_else(|| anyhow::anyhow!("link has no target path"))?;
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let target = Path::new(OsStr::from_bytes(target));
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let target = if target.is_relative() {
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target.to_owned()
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} else {
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self.root.join(target)
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};
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std::os::unix::fs::symlink(target, &rooted)
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.with_context(|| format!("failed to create symlink '{:?}'", rooted))?;
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}
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_ => {
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warn!("unknown file kind: {:?}", node.mode.file_type());
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return Ok(Walk::Continue);
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}
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};
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if self.preserve {
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fchownat(
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None,
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&rooted,
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Some(Uid::from_raw(node.uid)),
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Some(Gid::from_raw(node.gid)),
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FchownatFlags::NoFollowSymlink,
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)
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.with_context(|| format!("failed to change ownership of '{:?}'", &rooted))?;
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}
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Ok(Walk::Continue)
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}
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}
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// Parallel download implementation
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struct ParallelCopyVisitor<'a, S>
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where
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S: Store,
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{
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meta: &'a Reader,
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root: &'a Path,
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preserve: bool,
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pool: &'a mut WorkerPool<Downloader<S>>,
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}
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impl<'a, S> ParallelCopyVisitor<'a, S>
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where
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S: Store,
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{
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pub fn new(
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meta: &'a Reader,
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root: &'a Path,
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preserve: bool,
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pool: &'a mut WorkerPool<Downloader<S>>,
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) -> Self {
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Self {
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meta,
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root,
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preserve,
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pool,
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}
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}
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}
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#[async_trait::async_trait]
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impl<'a, S> WalkVisitor for ParallelCopyVisitor<'a, S>
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where
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S: Store,
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{
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async fn visit(&mut self, path: &Path, node: &Inode) -> Result<Walk> {
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let rooted = self.root.join(path.strip_prefix("/").unwrap());
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match node.mode.file_type() {
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FileType::Dir => {
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fs::create_dir_all(&rooted)
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.with_context(|| format!("failed to create directory '{:?}'", rooted))?;
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}
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FileType::Regular => {
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let blocks = self.meta.blocks(node.ino).await?;
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let worker = self.pool.get().await;
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worker.send((rooted.clone(), blocks, node.mode.mode()))?;
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}
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FileType::Link => {
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let target = node
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.data
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.as_deref()
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.ok_or_else(|| anyhow::anyhow!("link has no target path"))?;
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let target = Path::new(OsStr::from_bytes(target));
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let target = if target.is_relative() {
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target.to_owned()
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} else {
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self.root.join(target)
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};
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std::os::unix::fs::symlink(target, &rooted)
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.with_context(|| format!("failed to create symlink '{:?}'", rooted))?;
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}
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_ => {
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warn!("unknown file kind: {:?}", node.mode.file_type());
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return Ok(Walk::Continue);
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}
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};
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if self.preserve {
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fchownat(
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None,
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&rooted,
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Some(Uid::from_raw(node.uid)),
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Some(Gid::from_raw(node.gid)),
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FchownatFlags::NoFollowSymlink,
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)
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.with_context(|| format!("failed to change ownership of '{:?}'", &rooted))?;
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}
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Ok(Walk::Continue)
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}
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}
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struct Downloader<S>
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where
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S: Store,
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{
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cache: Arc<Cache<S>>,
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}
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impl<S> Downloader<S>
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where
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S: Store,
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{
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fn new(cache: Cache<S>) -> Self {
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Self {
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cache: Arc::new(cache),
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}
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}
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async fn download(&self, path: &Path, blocks: &[Block], mode: u32) -> Result<()> {
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let mut fd = OpenOptions::new()
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.create_new(true)
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.write(true)
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.truncate(true)
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.open(&path)
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.await
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.with_context(|| format!("failed to create file '{:?}'", path))?;
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self.cache
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.direct(&blocks, &mut fd)
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.await
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.with_context(|| format!("failed to download file '{:?}'", path))?;
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fd.set_permissions(Permissions::from_mode(mode)).await?;
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Ok(())
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}
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}
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impl<S> Clone for Downloader<S>
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where
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S: Store,
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{
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fn clone(&self) -> Self {
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Self {
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cache: Arc::clone(&self.cache),
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}
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}
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}
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#[async_trait::async_trait]
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impl<S> workers::Work for Downloader<S>
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where
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S: Store,
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{
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type Input = (PathBuf, Vec<Block>, u32);
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type Output = ();
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async fn run(&mut self, (path, blocks, mode): Self::Input) -> Self::Output {
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log::info!("downloading file {:?}", path);
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if let Err(err) = self.download(&path, &blocks, mode).await {
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log::error!("failed to download file {:?}: {}", path, err);
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}
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}
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}
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