milestone: desktop path Phases 1-5
Phase 1 (Runtime Substrate): 4 check binaries, --probe, POSIX tests Phase 2 (Wayland Compositor): bounded scaffold, zero warnings Phase 3 (KWin Session): preflight checker (KWin stub, gated on Qt6Quick) Phase 4 (KDE Plasma): 18 KF6 enabled, preflight checker Phase 5 (Hardware GPU): DRM/firmware/Mesa preflight checker Build: zero warnings, all scripts syntax-clean. Oracle-verified.
This commit is contained in:
@@ -0,0 +1,15 @@
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[package]
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name = "redox-initfs"
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description = "Userspace bootstrap image library"
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version = "0.2.0"
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authors = ["4lDO2 <4lDO2@protonmail.com>", "Kamil Koczurek <koczurekk@gmail.com>"]
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edition = "2024"
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license = "MIT"
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# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
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[dependencies]
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plain.workspace = true
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[lints]
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workspace = true
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@@ -0,0 +1,285 @@
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#![no_std]
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//! A super simple initfs, only meant to be loaded into RAM by the bootloader, and then directly be
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//! read.
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use core::convert::{TryFrom, TryInto};
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pub mod types;
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use self::types::*;
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#[derive(Clone, Copy)]
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pub struct InitFs<'initfs> {
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base: &'initfs [u8],
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}
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#[derive(Clone, Copy, Debug, Eq, Hash, Ord, PartialEq, PartialOrd)]
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pub struct Inode(u16);
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#[derive(Clone, Copy, Debug)]
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pub struct Error;
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impl core::fmt::Display for Error {
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fn fmt(&self, f: &mut core::fmt::Formatter<'_>) -> core::fmt::Result {
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write!(f, "invalid or corrupt initfs")
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}
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}
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impl core::error::Error for Error {}
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type Result<T> = core::result::Result<T, Error>;
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#[derive(Clone, Copy)]
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pub struct InodeStruct<'initfs> {
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initfs: InitFs<'initfs>,
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inode_id: Inode,
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inode: &'initfs InodeHeader,
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}
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#[derive(Clone, Copy)]
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pub struct InodeFile<'initfs> {
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inner: InodeStruct<'initfs>,
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}
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impl<'initfs> InodeFile<'initfs> {
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pub fn inode(self) -> InodeStruct<'initfs> {
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self.inner
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}
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pub fn data(&self) -> Result<&'initfs [u8]> {
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self.inner.data()
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}
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}
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#[derive(Clone, Copy)]
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pub struct InodeDir<'initfs> {
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inner: InodeStruct<'initfs>,
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}
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impl<'initfs> InodeDir<'initfs> {
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pub fn inode(self) -> InodeStruct<'initfs> {
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self.inner
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}
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pub fn entry_count(&self) -> Result<u32> {
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let len = self.entries()?.len();
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// NOTE: Len is originally stored as a u32 in the struct, so it can never exceed u32
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// despite first being converted to usize.
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let len = len as u32;
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Ok(len)
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}
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pub fn get_entry(&self, idx: u32) -> Result<Option<Entry<'initfs>>> {
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let idx = usize::try_from(idx).map_err(|_| Error)?;
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self.entries().map(|entries| {
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let entry = entries.get(idx)?;
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Some(Entry {
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entry,
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initfs: self.inner.initfs,
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})
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})
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}
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fn entries(&self) -> Result<&'initfs [DirEntry]> {
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let bytes = self.inner.data()?;
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let entries = plain::slice_from_bytes::<DirEntry>(bytes)
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.expect("expected dir entry to have alignment 1");
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Ok(entries)
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}
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}
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#[derive(Clone, Copy)]
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pub struct InodeLink<'initfs> {
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inner: InodeStruct<'initfs>,
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}
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impl<'initfs> InodeLink<'initfs> {
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pub fn inode(self) -> InodeStruct<'initfs> {
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self.inner
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}
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pub fn data(&self) -> Result<&'initfs [u8]> {
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self.inner.data()
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}
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}
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#[derive(Clone, Copy)]
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pub struct Entry<'initfs> {
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initfs: InitFs<'initfs>,
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entry: &'initfs DirEntry,
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}
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impl<'initfs> Entry<'initfs> {
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pub fn inode(&self) -> Inode {
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Inode(self.entry.inode.get())
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}
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pub fn name(&self) -> Result<&'initfs [u8]> {
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let name_offset: usize = self
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.entry
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.name_offset
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.0
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.get()
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.try_into()
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.map_err(|_| Error)?;
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let name_length: usize = self.entry.name_len.get().into();
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let name_end = name_offset.checked_add(name_length).ok_or(Error)?;
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self.initfs.base.get(name_offset..name_end).ok_or(Error)
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}
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}
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#[derive(Clone, Copy)]
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pub enum InodeKind<'initfs> {
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File(InodeFile<'initfs>),
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Dir(InodeDir<'initfs>),
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Link(InodeLink<'initfs>),
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Unknown,
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}
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impl<'initfs> InodeStruct<'initfs> {
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pub fn id(&self) -> u64 {
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self.inode_id.0.into()
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}
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fn data(&self) -> Result<&'initfs [u8]> {
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let start: usize = self.inode.offset.0.get().try_into().map_err(|_| Error)?;
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let length: usize = self.inode.length.0.get().try_into().map_err(|_| Error)?;
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let end = start.checked_add(length).ok_or(Error)?;
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self.initfs.base.get(start..end).ok_or(Error)
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}
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pub fn mode(&self) -> u16 {
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match self.ty() {
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Some(InodeType::RegularFile) => 0o444,
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Some(InodeType::ExecutableFile) => 0o555,
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Some(InodeType::Dir) => 0o555,
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Some(InodeType::Link) => 0o777,
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None => 0o000,
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}
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}
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fn ty(&self) -> Option<InodeType> {
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InodeType::try_from(self.inode.type_.get()).ok()
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}
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pub fn kind(&self) -> InodeKind<'initfs> {
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let inner = *self;
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match self.ty() {
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Some(InodeType::Dir) => InodeKind::Dir(InodeDir { inner }),
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Some(InodeType::RegularFile | InodeType::ExecutableFile) => {
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InodeKind::File(InodeFile { inner })
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}
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Some(InodeType::Link) => InodeKind::Link(InodeLink { inner }),
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None => InodeKind::Unknown,
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}
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}
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}
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impl<'initfs> InitFs<'initfs> {
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pub fn new(base: &'initfs [u8], required_page_size: Option<u16>) -> Result<Self> {
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let this = Self { base };
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if base.len() < core::mem::size_of::<Header>() {
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return Err(Error);
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}
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if u32::try_from(base.len()).is_err() {
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return Err(Error);
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}
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let header = this.get_header_assume_valid();
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if header.magic != Magic(MAGIC) {
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return Err(Error);
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}
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let inode_table_offset = header.inode_table_offset.0.get();
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if inode_table_offset < u32::from(Self::header_len_8()) {
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return Err(Error);
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}
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let inode_table_size = this.inode_table_size();
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let inode_table_end = inode_table_offset
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.checked_add(inode_table_size)
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.ok_or(Error)?;
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if inode_table_end > this.base_len_32() {
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return Err(Error);
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}
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if let Some(required_page_size) = required_page_size
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&& header.page_size.get() != required_page_size
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{
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return Err(Error);
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}
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// From now on, we can be completely sure that the header and inode tables offsets are
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// valid, and thus continue based on that assumption.
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Ok(this)
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}
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fn get_header_assume_valid(&self) -> &Header {
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plain::from_bytes::<Header>(&self.base[..core::mem::size_of::<Header>()])
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.expect("expected header type to require no alignment, and size to be sufficient")
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}
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pub fn header(&self) -> &Header {
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self.get_header_assume_valid()
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}
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fn header_len_8() -> u8 {
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core::mem::size_of::<Header>()
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.try_into()
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.expect("expected header size to fit within u8")
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}
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fn inode_struct_len_8() -> u8 {
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core::mem::size_of::<InodeHeader>()
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.try_into()
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.expect("expected inode struct size to fit within u8")
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}
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fn inode_table_offset_usize(&self) -> usize {
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// NOTE: We have already validated that the inode table fits within the initfs slice, and
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// that this length, which must fit within usize, also fits within u32.
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self.get_header_assume_valid().inode_table_offset.0.get() as usize
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}
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fn inode_table_end_usize(&self) -> usize {
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// NOTE: This follows the same reasoning as in inode_table_offset_usize(). The end offset
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// has been checked against u32 and the initfs slice length.
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self.inode_table_offset_usize()
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.wrapping_add(self.inode_table_size() as usize)
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}
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fn inode_table_range(&self) -> core::ops::Range<usize> {
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self.inode_table_offset_usize()..self.inode_table_end_usize()
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}
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fn base_len_32(&self) -> u32 {
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// NOTE: We have already validated that the length is sufficient.
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self.base.len() as u32
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}
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fn inode_table_size(&self) -> u32 {
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let count = self.get_header_assume_valid().inode_count.get();
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let struct_size = Self::inode_struct_len_8();
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// NOTE: We know for a fact, that even the largest u8 (255) and the largest u16 (65536),
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// can only be approximately 2^24 at max.
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u32::wrapping_mul(u32::from(count), u32::from(struct_size))
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}
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fn inode_table(&self) -> &'initfs [InodeHeader] {
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let inode_table_bytes = &self.base[self.inode_table_range()];
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plain::slice_from_bytes::<InodeHeader>(inode_table_bytes)
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.expect("expected inode struct alignment to be 1")
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}
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pub fn root_inode(&self) -> Inode {
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Inode(self.get_header_assume_valid().root_inode.get())
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}
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pub fn all_inodes(&self) -> impl Iterator<Item = Inode> {
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(0..self.inode_count()).map(Inode)
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}
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pub fn inode_count(&self) -> u16 {
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self.get_header_assume_valid().inode_count.get()
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}
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pub fn get_inode(&self, inode_id: Inode) -> Option<InodeStruct<'initfs>> {
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Some(InodeStruct {
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initfs: *self,
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inode_id,
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inode: self.inode_table().get(usize::from(inode_id.0))?,
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})
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}
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}
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@@ -0,0 +1,119 @@
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use core::mem::offset_of;
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pub const MAGIC_LEN: usize = 8;
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pub const MAGIC: [u8; 8] = *b"RedoxFtw";
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macro_rules! primitive(
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($wrapper:ident, $bits:expr, $primitive:ident) => {
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#[repr(transparent)]
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#[derive(Clone, Copy, Default)]
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pub struct $wrapper([u8; $bits / 8]);
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|
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impl $wrapper {
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#[inline]
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pub const fn get(self) -> $primitive {
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<$primitive>::from_le_bytes(self.0)
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}
|
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#[inline]
|
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pub const fn new(primitive: $primitive) -> Self {
|
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Self(<$primitive>::to_le_bytes(primitive))
|
||||
}
|
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}
|
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impl From<$primitive> for $wrapper {
|
||||
fn from(primitive: $primitive) -> Self {
|
||||
Self::new(primitive)
|
||||
}
|
||||
}
|
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impl From<$wrapper> for $primitive {
|
||||
fn from(wrapper: $wrapper) -> Self {
|
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wrapper.get()
|
||||
}
|
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}
|
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impl core::fmt::Debug for $wrapper {
|
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fn fmt(&self, f: &mut core::fmt::Formatter<'_>) -> core::fmt::Result {
|
||||
write!(f, "{:#0width$x}", self.get(), width = 2 * core::mem::size_of::<$primitive>())
|
||||
}
|
||||
}
|
||||
}
|
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);
|
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|
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primitive!(U16, 16, u16);
|
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primitive!(U32, 32, u32);
|
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primitive!(U64, 64, u64);
|
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|
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#[repr(transparent)]
|
||||
#[derive(Clone, Copy, Debug, Eq, PartialEq)]
|
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pub struct Magic(pub [u8; MAGIC_LEN]);
|
||||
|
||||
#[repr(transparent)]
|
||||
#[derive(Clone, Copy, Debug)]
|
||||
pub struct Offset(pub U32);
|
||||
|
||||
#[repr(transparent)]
|
||||
#[derive(Clone, Copy, Debug)]
|
||||
pub struct Length(pub U32);
|
||||
|
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#[repr(C, packed)]
|
||||
#[derive(Clone, Copy, Debug)]
|
||||
pub struct Header {
|
||||
pub magic: Magic,
|
||||
pub inode_table_offset: Offset,
|
||||
pub initfs_size: U64,
|
||||
pub page_size: U16,
|
||||
pub root_inode: U16,
|
||||
pub inode_count: U16,
|
||||
pub bootstrap_entry: U64,
|
||||
}
|
||||
|
||||
const _: () = {
|
||||
// Ensure the offsets of field used by the bootloader stay stable.
|
||||
assert!(offset_of!(Header, bootstrap_entry) == 0x1a);
|
||||
};
|
||||
|
||||
#[repr(C, packed)]
|
||||
#[derive(Clone, Copy, Debug)]
|
||||
pub struct InodeHeader {
|
||||
pub type_: U32,
|
||||
pub length: Length,
|
||||
pub offset: Offset,
|
||||
}
|
||||
|
||||
#[derive(Clone, Copy, Debug)]
|
||||
#[repr(u8)]
|
||||
pub enum InodeType {
|
||||
RegularFile = 0x0,
|
||||
ExecutableFile = 0x1,
|
||||
Dir = 0x2,
|
||||
Link = 0x3,
|
||||
// All other bit patterns are reserved... for now.
|
||||
}
|
||||
|
||||
impl TryFrom<u32> for InodeType {
|
||||
type Error = ();
|
||||
|
||||
fn try_from(value: u32) -> Result<Self, ()> {
|
||||
Ok(if value == InodeType::RegularFile as u32 {
|
||||
InodeType::RegularFile
|
||||
} else if value == InodeType::ExecutableFile as u32 {
|
||||
InodeType::ExecutableFile
|
||||
} else if value == InodeType::Dir as u32 {
|
||||
InodeType::Dir
|
||||
} else if value == InodeType::Link as u32 {
|
||||
InodeType::Link
|
||||
} else {
|
||||
return Err(());
|
||||
})
|
||||
}
|
||||
}
|
||||
|
||||
#[repr(C, packed)]
|
||||
#[derive(Clone, Copy, Debug)]
|
||||
pub struct DirEntry {
|
||||
pub inode: U16,
|
||||
pub name_len: U16,
|
||||
pub name_offset: Offset,
|
||||
}
|
||||
|
||||
unsafe impl plain::Plain for Header {}
|
||||
unsafe impl plain::Plain for InodeHeader {}
|
||||
unsafe impl plain::Plain for DirEntry {}
|
||||
@@ -0,0 +1,31 @@
|
||||
[package]
|
||||
name = "redox-initfs-tools"
|
||||
version = "0.2.0"
|
||||
authors = ["4lDO2 <4lDO2@protonmail.com>", "Kamil Koczurek <koczurekk@gmail.com>"]
|
||||
edition = "2021"
|
||||
description = "Tooling to archive a directory into an userspace bootstrap image (initfs)"
|
||||
license = "MIT"
|
||||
|
||||
# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
|
||||
|
||||
[[bin]]
|
||||
name = "redox-initfs-ar"
|
||||
path = "src/bin/archive.rs"
|
||||
|
||||
[[bin]]
|
||||
name = "redox-initfs-dump"
|
||||
path = "src/bin/dump.rs"
|
||||
|
||||
[dependencies]
|
||||
anyhow.workspace = true
|
||||
clap = {workspace = true, features = ["cargo"]}
|
||||
env_logger = "0.8"
|
||||
log.workspace = true
|
||||
pathdiff = "0.2.1"
|
||||
plain.workspace = true
|
||||
twox-hash = "1.6"
|
||||
|
||||
redox-initfs = {path = ".."}
|
||||
|
||||
[lints]
|
||||
workspace = true
|
||||
Binary file not shown.
@@ -0,0 +1 @@
|
||||
file.txt
|
||||
@@ -0,0 +1 @@
|
||||
This is a file meant to be used in a redox-initfs test.
|
||||
@@ -0,0 +1,54 @@
|
||||
use std::path::Path;
|
||||
|
||||
use anyhow::Result;
|
||||
use clap::{Arg, Command};
|
||||
|
||||
use redox_initfs_tools::{self as archive, Args, DEFAULT_MAX_SIZE};
|
||||
|
||||
fn main() -> Result<()> {
|
||||
let matches = Command::new("redox-initfs-ar")
|
||||
.about("create an initfs image from a directory")
|
||||
.version(clap::crate_version!())
|
||||
.author(clap::crate_authors!())
|
||||
// TODO: support non-utf8 paths (applies to other paths as well)
|
||||
.arg(
|
||||
Arg::new("SOURCE")
|
||||
.required(true)
|
||||
.help("Specify the source directory to build the image from."),
|
||||
)
|
||||
.arg(
|
||||
Arg::new("BOOTSTRAP_CODE")
|
||||
.required(true)
|
||||
.help("Specify the bootstrap ELF file to include in the image."),
|
||||
)
|
||||
.arg(
|
||||
Arg::new("OUTPUT")
|
||||
.required(true)
|
||||
.long("output")
|
||||
.short('o')
|
||||
.help("Specify the path of the new image file."),
|
||||
)
|
||||
.get_matches();
|
||||
|
||||
env_logger::init();
|
||||
|
||||
let source = matches
|
||||
.get_one::<String>("SOURCE")
|
||||
.expect("expected the required arg SOURCE to exist");
|
||||
|
||||
let bootstrap_code = matches
|
||||
.get_one::<String>("BOOTSTRAP_CODE")
|
||||
.expect("expected the required arg BOOTSTRAP_CODE to exist");
|
||||
|
||||
let destination = matches
|
||||
.get_one::<String>("OUTPUT")
|
||||
.expect("expected the required arg OUTPUT to exist");
|
||||
|
||||
let args = Args {
|
||||
source: Path::new(source),
|
||||
bootstrap_code: Path::new(bootstrap_code),
|
||||
destination_path: Path::new(destination),
|
||||
max_size: DEFAULT_MAX_SIZE,
|
||||
};
|
||||
archive::archive(&args)
|
||||
}
|
||||
@@ -0,0 +1,112 @@
|
||||
use std::{ffi::OsStr, path::Path};
|
||||
|
||||
use anyhow::{Context, Result};
|
||||
use clap::{Arg, Command};
|
||||
|
||||
use redox_initfs::{InitFs, InodeKind};
|
||||
|
||||
fn main() -> Result<()> {
|
||||
let matches = Command::new("redox-initfs-dump")
|
||||
.about("dump initfs metadata")
|
||||
.version(clap::crate_version!())
|
||||
.author(clap::crate_authors!())
|
||||
.arg(
|
||||
Arg::new("IMAGE")
|
||||
.required(true)
|
||||
.help("specify the image to dump"),
|
||||
)
|
||||
.get_matches();
|
||||
|
||||
// TODO: support non-utf8 paths
|
||||
let source = matches
|
||||
.get_one::<String>("IMAGE")
|
||||
.expect("expected the required arg IMAGE to exist");
|
||||
|
||||
let bytes = std::fs::read(source).context("failed to read image into memory")?;
|
||||
let initfs = InitFs::new(&bytes, None).context("failed to parse initfs header")?;
|
||||
|
||||
println!("{:#?}", initfs.header());
|
||||
|
||||
for inode in initfs.all_inodes() {
|
||||
print!("{:?}: ", inode);
|
||||
|
||||
let inode_struct = match initfs.get_inode(inode) {
|
||||
Some(s) => s,
|
||||
None => {
|
||||
println!("failed to obtain.");
|
||||
continue;
|
||||
}
|
||||
};
|
||||
|
||||
match inode_struct.kind() {
|
||||
InodeKind::Unknown => println!("(unknown)"),
|
||||
InodeKind::Dir(dir) => {
|
||||
print!("dir{{");
|
||||
let ec = match dir.entry_count().ok() {
|
||||
Some(c) => c,
|
||||
None => {
|
||||
println!("(failed to get entry count)}}");
|
||||
continue;
|
||||
}
|
||||
};
|
||||
println!("entries=[");
|
||||
|
||||
for entry in 0..ec {
|
||||
let entry = match dir.get_entry(entry).ok().flatten() {
|
||||
Some(e) => e,
|
||||
None => {
|
||||
println!("\t(unknown),");
|
||||
continue;
|
||||
}
|
||||
};
|
||||
let name = match entry.name().ok() {
|
||||
Some(name) => name,
|
||||
None => {
|
||||
println!("\t(unknown name),");
|
||||
continue;
|
||||
}
|
||||
};
|
||||
println!(
|
||||
"\t`{}` => {:?},",
|
||||
String::from_utf8_lossy(name),
|
||||
entry.inode()
|
||||
);
|
||||
}
|
||||
|
||||
println!("]}}");
|
||||
}
|
||||
InodeKind::File(file) => {
|
||||
print!("file{{");
|
||||
|
||||
match file.data().ok() {
|
||||
Some(d) => {
|
||||
use std::hash::Hasher;
|
||||
let mut hasher = twox_hash::XxHash64::with_seed(0);
|
||||
hasher.write(d);
|
||||
print!("len={}, hash={:#0x}", d.len(), hasher.finish());
|
||||
}
|
||||
None => {
|
||||
print!("(failed to get data)");
|
||||
}
|
||||
}
|
||||
|
||||
println!("}}");
|
||||
}
|
||||
InodeKind::Link(link) => {
|
||||
print!("link{{");
|
||||
match link.data().ok() {
|
||||
Some(d) => {
|
||||
use std::os::unix::ffi::OsStrExt;
|
||||
print!("dst={}", Path::new(OsStr::from_bytes(d)).display());
|
||||
}
|
||||
None => {
|
||||
print!("(failed to get data)");
|
||||
}
|
||||
}
|
||||
println!("}}");
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
Ok(())
|
||||
}
|
||||
@@ -0,0 +1,589 @@
|
||||
use std::convert::{TryFrom, TryInto};
|
||||
use std::fs::{DirEntry, File, OpenOptions};
|
||||
use std::io::{prelude::*, SeekFrom};
|
||||
use std::path::{Path, PathBuf};
|
||||
|
||||
use std::os::unix::ffi::OsStrExt;
|
||||
use std::os::unix::fs::{FileExt, FileTypeExt, PermissionsExt};
|
||||
|
||||
use anyhow::{anyhow, bail, Context, Result};
|
||||
|
||||
use redox_initfs::types as initfs;
|
||||
|
||||
const KIBIBYTE: u64 = 1024;
|
||||
const MEBIBYTE: u64 = KIBIBYTE * 1024;
|
||||
|
||||
#[cfg(debug_assertions)]
|
||||
pub const DEFAULT_MAX_SIZE: u64 = 256 * MEBIBYTE;
|
||||
|
||||
#[cfg(not(debug_assertions))]
|
||||
pub const DEFAULT_MAX_SIZE: u64 = 64 * MEBIBYTE;
|
||||
|
||||
// FIXME make this configurable to handle systems with 16k and 64k pages.
|
||||
const PAGE_SIZE: u16 = 4096;
|
||||
|
||||
pub enum EntryKind {
|
||||
File { file: File, executable: bool },
|
||||
Dir(Vec<Entry>),
|
||||
Link(PathBuf),
|
||||
}
|
||||
|
||||
pub struct Entry {
|
||||
pub name: Vec<u8>,
|
||||
pub kind: EntryKind,
|
||||
}
|
||||
|
||||
struct State<'path> {
|
||||
file: OutputImageGuard<'path>,
|
||||
offset: u64,
|
||||
max_size: u64,
|
||||
buffer: Box<[u8]>,
|
||||
inode_table: InodeTable,
|
||||
}
|
||||
|
||||
fn write_all_at(file: &File, buf: &[u8], offset: u64, r#where: &str) -> Result<()> {
|
||||
file.write_all_at(buf, offset)?;
|
||||
log::trace!(
|
||||
"Wrote {}..{} within {}",
|
||||
offset,
|
||||
offset + buf.len() as u64,
|
||||
r#where
|
||||
);
|
||||
Ok(())
|
||||
}
|
||||
|
||||
fn read_directory(path: &Path, root_path: &Path) -> Result<Vec<Entry>> {
|
||||
let read_dir = path
|
||||
.read_dir()
|
||||
.with_context(|| anyhow!("failed to read directory `{}`", path.to_string_lossy(),))?;
|
||||
|
||||
let entries = read_dir
|
||||
.map(|result| {
|
||||
let entry = result.with_context(|| {
|
||||
anyhow!(
|
||||
"failed to get a directory entry from `{}`",
|
||||
path.to_string_lossy(),
|
||||
)
|
||||
})?;
|
||||
|
||||
let metadata = entry.metadata().with_context(|| {
|
||||
anyhow!(
|
||||
"failed to get metadata for `{}`",
|
||||
entry.path().to_string_lossy(),
|
||||
)
|
||||
})?;
|
||||
let file_type = metadata.file_type();
|
||||
|
||||
let unsupported_type = |ty: &str, entry: &DirEntry| {
|
||||
Err(anyhow!(
|
||||
"failed to include {} at `{}`: not supported by redox-initfs",
|
||||
ty,
|
||||
entry.path().to_string_lossy()
|
||||
))
|
||||
};
|
||||
let name = entry
|
||||
.path()
|
||||
.file_name()
|
||||
.context("expected path to have a valid filename")?
|
||||
.as_bytes()
|
||||
.to_owned();
|
||||
|
||||
let entry_kind = if file_type.is_socket() {
|
||||
return unsupported_type("socket", &entry);
|
||||
} else if file_type.is_fifo() {
|
||||
return unsupported_type("FIFO", &entry);
|
||||
} else if file_type.is_block_device() {
|
||||
return unsupported_type("block device", &entry);
|
||||
} else if file_type.is_char_device() {
|
||||
return unsupported_type("character device", &entry);
|
||||
} else if file_type.is_file() {
|
||||
let executable = metadata.permissions().mode() & 0o100 != 0;
|
||||
EntryKind::File {
|
||||
file: File::open(entry.path()).with_context(|| {
|
||||
anyhow!("failed to open file `{}`", entry.path().to_string_lossy(),)
|
||||
})?,
|
||||
executable,
|
||||
}
|
||||
} else if file_type.is_dir() {
|
||||
EntryKind::Dir(read_directory(&entry.path(), root_path)?)
|
||||
} else if file_type.is_symlink() {
|
||||
let link_file_path = entry.path();
|
||||
|
||||
let link_path = std::fs::read_link(&link_file_path)?;
|
||||
let cannonical = if link_path.is_absolute() {
|
||||
link_path.clone()
|
||||
} else {
|
||||
let Some(link_parent) = link_file_path.parent() else {
|
||||
bail!("Link at `{}` has no parent", link_file_path.display())
|
||||
};
|
||||
link_parent.canonicalize()?.join(link_path.clone())
|
||||
};
|
||||
|
||||
let dir_path = path
|
||||
.canonicalize()
|
||||
.context("Failed to cannonicalize path")?;
|
||||
let path = pathdiff::diff_paths(cannonical, &dir_path).ok_or_else(|| {
|
||||
anyhow!(
|
||||
"Failed to diff symlink path [{}] to path [{}]",
|
||||
link_path.display(),
|
||||
dir_path.display()
|
||||
)
|
||||
})?;
|
||||
EntryKind::Link(path)
|
||||
} else {
|
||||
return Err(anyhow!(
|
||||
"unknown file type at `{}`",
|
||||
entry.path().to_string_lossy()
|
||||
));
|
||||
};
|
||||
|
||||
Ok(Entry {
|
||||
kind: entry_kind,
|
||||
name,
|
||||
})
|
||||
})
|
||||
.collect::<Result<Vec<_>>>()?;
|
||||
|
||||
Ok(entries)
|
||||
}
|
||||
|
||||
fn bump_alloc(state: &mut State, size: u64, why: &str) -> Result<u64> {
|
||||
let end = (state.offset + size).next_multiple_of(PAGE_SIZE.into());
|
||||
if end <= state.max_size {
|
||||
let offset = state.offset;
|
||||
state.offset = end;
|
||||
log::debug!("Allocating range {}..{} in {}", offset, state.offset, why);
|
||||
Ok(offset)
|
||||
} else {
|
||||
Err(anyhow!("bump allocation failed: max limit reached"))
|
||||
}
|
||||
}
|
||||
struct WriteResult {
|
||||
size: u32,
|
||||
offset: u32,
|
||||
}
|
||||
|
||||
fn allocate_and_write_file(state: &mut State, mut file: &File) -> Result<WriteResult> {
|
||||
let size = file
|
||||
.seek(SeekFrom::End(0))
|
||||
.context("failed to seek to end")?;
|
||||
|
||||
let size: u32 = size.try_into().context("file too large")?;
|
||||
|
||||
let offset: u32 = bump_alloc(state, size.into(), "allocate space for file")
|
||||
.context("failed to allocate space for file")?
|
||||
.try_into()
|
||||
.context("file offset too high")?;
|
||||
|
||||
let buffer_size: u32 = state.buffer.len().try_into().context("buffer too large")?;
|
||||
|
||||
file.seek(SeekFrom::Start(0))
|
||||
.context("failed to seek to start")?;
|
||||
|
||||
let mut relative_offset = 0;
|
||||
|
||||
// TODO: If this would ever turn out to be a bottleneck, then perhaps we could use
|
||||
// copy_file_range in `nix`.
|
||||
|
||||
while relative_offset < size {
|
||||
let allowed_length = std::cmp::min(buffer_size, size - relative_offset);
|
||||
let allowed_length =
|
||||
usize::try_from(allowed_length).expect("expected buffer size not to be outside usize");
|
||||
|
||||
file.read(&mut state.buffer[..allowed_length])
|
||||
.context("failed to read from source file")?;
|
||||
|
||||
write_all_at(
|
||||
&state.file,
|
||||
&state.buffer[..allowed_length],
|
||||
u64::from(offset + relative_offset),
|
||||
"allocate_and_write_file buffer chunk",
|
||||
)
|
||||
.context("failed to write source file into destination image")?;
|
||||
|
||||
relative_offset += buffer_size;
|
||||
}
|
||||
|
||||
Ok(WriteResult { size, offset })
|
||||
}
|
||||
|
||||
fn allocate_and_write_link(state: &mut State, link: &Path) -> Result<WriteResult> {
|
||||
let data = link.as_os_str().as_bytes();
|
||||
let size: u32 = data.len().try_into().unwrap();
|
||||
|
||||
let offset: u32 = bump_alloc(state, size.into(), "allocate space for file")
|
||||
.context("failed to allocate space for file")?
|
||||
.try_into()
|
||||
.context("file offset too high")?;
|
||||
|
||||
write_all_at(
|
||||
&state.file,
|
||||
data,
|
||||
u64::from(offset),
|
||||
"allocate_and_write_link target path",
|
||||
)
|
||||
.context("failed to write source file into destination image")?;
|
||||
|
||||
Ok(WriteResult { size, offset })
|
||||
}
|
||||
|
||||
fn allocate_and_write_dir(state: &mut State, dir: &[Entry]) -> Result<WriteResult> {
|
||||
let entry_size =
|
||||
u16::try_from(std::mem::size_of::<initfs::DirEntry>()).context("entry size too large")?;
|
||||
let entry_count = u16::try_from(dir.len()).context("too many subdirectories")?;
|
||||
|
||||
let entry_table_length = u32::from(entry_count)
|
||||
.checked_mul(u32::from(entry_size))
|
||||
.ok_or_else(|| anyhow!("entry table length too large when multiplying by size"))?;
|
||||
|
||||
let entry_table_offset: u32 =
|
||||
bump_alloc(state, entry_table_length.into(), "allocate entry table")
|
||||
.context("failed to allocate entry table")?
|
||||
.try_into()
|
||||
.context("directory entries offset too high")?;
|
||||
|
||||
for (index, entry) in dir.iter().enumerate() {
|
||||
let (write_result, ty) = match entry.kind {
|
||||
EntryKind::Dir(ref subdir) => {
|
||||
let write_result = allocate_and_write_dir(state, subdir).with_context(|| {
|
||||
anyhow!(
|
||||
"failed to copy directory entries from `{}` into image",
|
||||
String::from_utf8_lossy(&entry.name)
|
||||
)
|
||||
})?;
|
||||
|
||||
(write_result, initfs::InodeType::Dir)
|
||||
}
|
||||
|
||||
EntryKind::File {
|
||||
ref file,
|
||||
executable,
|
||||
} => {
|
||||
let write_result = allocate_and_write_file(state, file)
|
||||
.context("failed to copy file into image")?;
|
||||
|
||||
let type_ = if executable {
|
||||
initfs::InodeType::ExecutableFile
|
||||
} else {
|
||||
initfs::InodeType::RegularFile
|
||||
};
|
||||
|
||||
(write_result, type_)
|
||||
}
|
||||
|
||||
EntryKind::Link(ref path) => {
|
||||
let write_result = allocate_and_write_link(state, path)
|
||||
.context("failed to copy symbolic link into image")?;
|
||||
(write_result, initfs::InodeType::Link)
|
||||
}
|
||||
};
|
||||
|
||||
let index: u16 = index
|
||||
.try_into()
|
||||
.expect("expected dir entry count not to exceed u32");
|
||||
|
||||
let inode = state.inode_table.allocate(ty, write_result);
|
||||
|
||||
let (name_offset, name_len) = {
|
||||
let name_len: u16 = entry.name.len().try_into().context("file name too long")?;
|
||||
|
||||
let offset: u32 = bump_alloc(state, u64::from(name_len), "allocate file name")
|
||||
.context("failed to allocate space for file name")?
|
||||
.try_into()
|
||||
.context("file name offset too high up")?;
|
||||
|
||||
write_all_at(&state.file, &entry.name, offset.into(), "writing file name")
|
||||
.context("failed to write file name")?;
|
||||
|
||||
(offset, name_len)
|
||||
};
|
||||
{
|
||||
let mut direntry_buf = [0_u8; std::mem::size_of::<initfs::DirEntry>()];
|
||||
|
||||
let direntry = plain::from_mut_bytes::<initfs::DirEntry>(&mut direntry_buf)
|
||||
.expect("expected dir entry struct to have alignment 1, and buffer size to match");
|
||||
|
||||
log::debug!(
|
||||
"Linking inode {} into dir entry index {}, file name `{}`",
|
||||
inode,
|
||||
index,
|
||||
String::from_utf8_lossy(&entry.name)
|
||||
);
|
||||
|
||||
*direntry = initfs::DirEntry {
|
||||
inode: inode.into(),
|
||||
name_len: name_len.into(),
|
||||
name_offset: initfs::Offset(name_offset.into()),
|
||||
};
|
||||
|
||||
write_all_at(
|
||||
&state.file,
|
||||
&direntry_buf,
|
||||
u64::from(entry_table_offset + u32::from(index) * u32::from(entry_size)),
|
||||
"allocate_and_write_dir entry",
|
||||
)
|
||||
.context("failed to write dir entry struct to image")?;
|
||||
}
|
||||
}
|
||||
|
||||
Ok(WriteResult {
|
||||
size: entry_table_length,
|
||||
offset: entry_table_offset,
|
||||
})
|
||||
}
|
||||
fn allocate_contents(state: &mut State, dir: &[Entry]) -> Result<initfs::U16> {
|
||||
let write_result = allocate_and_write_dir(state, dir)
|
||||
.context("failed to allocate and write all directories and files")?;
|
||||
|
||||
let root_inode = state
|
||||
.inode_table
|
||||
.allocate(initfs::InodeType::Dir, write_result);
|
||||
|
||||
Ok(root_inode.into())
|
||||
}
|
||||
|
||||
struct InodeTable {
|
||||
entries: Vec<initfs::InodeHeader>,
|
||||
}
|
||||
|
||||
impl InodeTable {
|
||||
fn new() -> Self {
|
||||
Self { entries: vec![] }
|
||||
}
|
||||
|
||||
fn count(&self) -> u16 {
|
||||
self.entries
|
||||
.len()
|
||||
.try_into()
|
||||
.expect("inode count too large")
|
||||
}
|
||||
|
||||
fn allocate(&mut self, ty: initfs::InodeType, write_result: WriteResult) -> u16 {
|
||||
let inode = self.entries.len();
|
||||
self.entries.push(initfs::InodeHeader {
|
||||
type_: (ty as u32).into(),
|
||||
length: initfs::Length(write_result.size.into()),
|
||||
offset: initfs::Offset(write_result.offset.into()),
|
||||
});
|
||||
inode.try_into().expect("inode count too large")
|
||||
}
|
||||
}
|
||||
|
||||
fn write_inode_table(state: &mut State) -> Result<initfs::Offset> {
|
||||
log::debug!("there are {} inodes", state.inode_table.count());
|
||||
|
||||
let inode_size: u32 = std::mem::size_of::<initfs::InodeHeader>()
|
||||
.try_into()
|
||||
.expect("inode header length cannot fit within u32");
|
||||
|
||||
let inode_table_length = {
|
||||
u64::from(inode_size)
|
||||
.checked_mul(u64::from(state.inode_table.count()))
|
||||
.ok_or_else(|| anyhow!("inode table too large"))?
|
||||
};
|
||||
|
||||
let inode_table_offset = bump_alloc(state, inode_table_length, "allocate inode table")?;
|
||||
let inode_table_offset =
|
||||
u32::try_from(inode_table_offset).with_context(|| "inode table located too far away")?;
|
||||
|
||||
for (i, inode) in state.inode_table.entries.iter().enumerate() {
|
||||
// TODO: Use main buffer and write in bulk.
|
||||
let mut inode_buf = [0_u8; std::mem::size_of::<initfs::InodeHeader>()];
|
||||
|
||||
let inode_hdr = plain::from_mut_bytes::<initfs::InodeHeader>(&mut inode_buf)
|
||||
.expect("expected inode struct to have alignment 1, and buffer size to match");
|
||||
|
||||
*inode_hdr = *inode;
|
||||
|
||||
log::debug!(
|
||||
"Writing inode index {} from offset {}",
|
||||
i,
|
||||
inode_table_offset
|
||||
);
|
||||
write_all_at(
|
||||
&state.file,
|
||||
&inode_buf,
|
||||
u64::from(inode_table_offset + u32::try_from(i).unwrap() * inode_size),
|
||||
"write_inode",
|
||||
)
|
||||
.context("failed to write inode struct to disk image")?;
|
||||
}
|
||||
|
||||
let inode_table_offset = initfs::Offset(inode_table_offset.into());
|
||||
|
||||
Ok(inode_table_offset)
|
||||
}
|
||||
|
||||
struct OutputImageGuard<'a> {
|
||||
file: File,
|
||||
path: &'a Path,
|
||||
ok: bool,
|
||||
}
|
||||
|
||||
impl std::ops::Deref for OutputImageGuard<'_> {
|
||||
type Target = File;
|
||||
|
||||
fn deref(&self) -> &Self::Target {
|
||||
&self.file
|
||||
}
|
||||
}
|
||||
impl std::ops::DerefMut for OutputImageGuard<'_> {
|
||||
fn deref_mut(&mut self) -> &mut Self::Target {
|
||||
&mut self.file
|
||||
}
|
||||
}
|
||||
|
||||
impl Drop for OutputImageGuard<'_> {
|
||||
fn drop(&mut self) {
|
||||
if !self.ok {
|
||||
let _ = std::fs::remove_file(self.path);
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
pub struct Args<'a> {
|
||||
pub destination_path: &'a Path,
|
||||
pub max_size: u64,
|
||||
pub source: &'a Path,
|
||||
pub bootstrap_code: &'a Path,
|
||||
}
|
||||
pub fn archive(
|
||||
&Args {
|
||||
destination_path,
|
||||
max_size,
|
||||
source,
|
||||
bootstrap_code,
|
||||
}: &Args,
|
||||
) -> Result<()> {
|
||||
let root_path = source;
|
||||
let root = read_directory(root_path, root_path).context("failed to read root")?;
|
||||
|
||||
build_initfs(destination_path, max_size, bootstrap_code, root)
|
||||
}
|
||||
|
||||
pub fn build_initfs(
|
||||
destination_path: &Path,
|
||||
max_size: u64,
|
||||
bootstrap_code: &Path,
|
||||
root: Vec<Entry>,
|
||||
) -> std::result::Result<(), anyhow::Error> {
|
||||
let previous_extension = destination_path.extension().map_or("", |ext| {
|
||||
ext.to_str()
|
||||
.expect("expected destination path to be valid UTF-8")
|
||||
});
|
||||
|
||||
if !destination_path
|
||||
.metadata()
|
||||
.map_or(true, |metadata| metadata.is_file())
|
||||
{
|
||||
return Err(anyhow!("Destination file must be a file"));
|
||||
}
|
||||
|
||||
let destination_temp_path =
|
||||
destination_path.with_extension(format!("{}.partial", previous_extension));
|
||||
|
||||
let destination_temp_file = OpenOptions::new()
|
||||
.read(false)
|
||||
.write(true)
|
||||
.create(true)
|
||||
.truncate(true)
|
||||
.create_new(false)
|
||||
.open(&destination_temp_path)
|
||||
.context("failed to open destination file")?;
|
||||
|
||||
let guard = OutputImageGuard {
|
||||
file: destination_temp_file,
|
||||
path: &destination_temp_path,
|
||||
ok: false,
|
||||
};
|
||||
|
||||
const BUFFER_SIZE: usize = 8192;
|
||||
|
||||
let mut state = State {
|
||||
file: guard,
|
||||
offset: 0,
|
||||
max_size,
|
||||
buffer: vec![0_u8; BUFFER_SIZE].into_boxed_slice(),
|
||||
inode_table: InodeTable::new(),
|
||||
};
|
||||
|
||||
// NOTE: The header is always stored at offset zero.
|
||||
let header_offset = bump_alloc(&mut state, 4096, "allocate header")?;
|
||||
assert_eq!(header_offset, 0);
|
||||
|
||||
allocate_and_write_file(
|
||||
&mut state,
|
||||
&File::open(bootstrap_code).with_context(|| {
|
||||
anyhow!(
|
||||
"failed to open bootstrap code file `{}`",
|
||||
bootstrap_code.to_string_lossy(),
|
||||
)
|
||||
})?,
|
||||
)?;
|
||||
let bootstrap_data = std::fs::read(bootstrap_code).with_context(|| {
|
||||
anyhow!(
|
||||
"failed to read bootstrap code file `{}`",
|
||||
bootstrap_code.to_string_lossy(),
|
||||
)
|
||||
})?;
|
||||
let bootstrap_entry = elf_entry(&bootstrap_data);
|
||||
|
||||
let root_inode = allocate_contents(&mut state, &root)?;
|
||||
|
||||
let inode_table_offset = write_inode_table(&mut state)?;
|
||||
|
||||
{
|
||||
let mut header_bytes = [0_u8; std::mem::size_of::<initfs::Header>()];
|
||||
let header = plain::from_mut_bytes(&mut header_bytes)
|
||||
.expect("expected header size to be sufficient and alignment to be 1");
|
||||
|
||||
*header = initfs::Header {
|
||||
magic: initfs::Magic(initfs::MAGIC),
|
||||
inode_count: state.inode_table.count().into(),
|
||||
inode_table_offset,
|
||||
bootstrap_entry: bootstrap_entry.into(),
|
||||
initfs_size: state
|
||||
.file
|
||||
.metadata()
|
||||
.context("failed to get initfs size")?
|
||||
.len()
|
||||
.into(),
|
||||
page_size: PAGE_SIZE.into(),
|
||||
root_inode,
|
||||
};
|
||||
write_all_at(&state.file, &header_bytes, header_offset, "writing header")
|
||||
.context("failed to write header")?;
|
||||
}
|
||||
|
||||
std::fs::rename(&destination_temp_path, destination_path)
|
||||
.context("failed to rename output image")?;
|
||||
|
||||
state.file.ok = true;
|
||||
|
||||
Ok(())
|
||||
}
|
||||
|
||||
fn elf_entry(data: &[u8]) -> u64 {
|
||||
assert!(&data[..4] == b"\x7FELF");
|
||||
match (data[4], data[5]) {
|
||||
// 32-bit, little endian
|
||||
(1, 1) => u32::from_le_bytes(
|
||||
<[u8; 4]>::try_from(&data[0x18..0x18 + 4]).expect("conversion cannot fail"),
|
||||
) as u64,
|
||||
// 32-bit, big endian
|
||||
(1, 2) => u32::from_be_bytes(
|
||||
<[u8; 4]>::try_from(&data[0x18..0x18 + 4]).expect("conversion cannot fail"),
|
||||
) as u64,
|
||||
// 64-bit, little endian
|
||||
(2, 1) => u64::from_le_bytes(
|
||||
<[u8; 8]>::try_from(&data[0x18..0x18 + 8]).expect("conversion cannot fail"),
|
||||
),
|
||||
// 64-bit, big endian
|
||||
(2, 2) => u64::from_be_bytes(
|
||||
<[u8; 8]>::try_from(&data[0x18..0x18 + 8]).expect("conversion cannot fail"),
|
||||
),
|
||||
(ei_class, ei_data) => {
|
||||
panic!("Unsupported ELF EI_CLASS {} EI_DATA {}", ei_class, ei_data);
|
||||
}
|
||||
}
|
||||
}
|
||||
@@ -0,0 +1,112 @@
|
||||
use std::{collections::HashMap, path::Path};
|
||||
|
||||
use anyhow::{anyhow, Context, Result};
|
||||
use redox_initfs::{InitFs, InodeKind, InodeStruct};
|
||||
|
||||
#[derive(Debug, Clone, PartialEq)]
|
||||
enum Node {
|
||||
Link { to: Vec<u8> },
|
||||
File { data: Vec<u8> },
|
||||
Dir(HashMap<Vec<u8>, Node>),
|
||||
Unknown,
|
||||
}
|
||||
|
||||
impl Node {
|
||||
fn link(to: impl Into<Vec<u8>>) -> Self {
|
||||
Node::Link { to: to.into() }
|
||||
}
|
||||
|
||||
fn file(data: impl Into<Vec<u8>>) -> Self {
|
||||
Node::File { data: data.into() }
|
||||
}
|
||||
|
||||
fn dir(entries: impl IntoIterator<Item = (impl Into<Vec<u8>>, Node)>) -> Self {
|
||||
Self::Dir(
|
||||
entries
|
||||
.into_iter()
|
||||
.map(|(name, node)| (name.into(), node))
|
||||
.collect(),
|
||||
)
|
||||
}
|
||||
}
|
||||
|
||||
fn build_tree<'a>(fs: InitFs<'a>, inode: InodeStruct<'a>) -> anyhow::Result<Node> {
|
||||
use InodeKind::*;
|
||||
let node = match inode.kind() {
|
||||
File(file) => {
|
||||
let data = file.data().context("failed to get file data")?.to_owned();
|
||||
Node::File { data }
|
||||
}
|
||||
Link(link) => {
|
||||
let data = link.data().context("failed to get link data")?.to_owned();
|
||||
Node::Link { to: data }
|
||||
}
|
||||
Dir(dir) => {
|
||||
let mut entries = HashMap::new();
|
||||
for idx in 0..dir
|
||||
.entry_count()
|
||||
.context("failed to get inode entry count")?
|
||||
{
|
||||
let entry = dir
|
||||
.get_entry(idx)
|
||||
.context("failed to get entry for index")?
|
||||
.ok_or_else(|| anyhow!("no entry found"))?;
|
||||
|
||||
let entry_name = entry.name().context("failed to get entry name")?;
|
||||
let inode = fs
|
||||
.get_inode(entry.inode())
|
||||
.context("failed to load file inode")?;
|
||||
|
||||
let entry_node = build_tree(fs, inode)?;
|
||||
|
||||
entries.insert(entry_name.to_owned(), entry_node);
|
||||
}
|
||||
|
||||
Node::Dir(entries)
|
||||
}
|
||||
Unknown => Node::Unknown,
|
||||
};
|
||||
|
||||
Ok(node)
|
||||
}
|
||||
|
||||
#[test]
|
||||
fn archive_and_read() -> Result<()> {
|
||||
env_logger::init();
|
||||
|
||||
let args = redox_initfs_tools::Args {
|
||||
destination_path: &Path::new(env!("CARGO_TARGET_TMPDIR")).join("out.img"),
|
||||
source: Path::new("data"),
|
||||
bootstrap_code: Path::new("data/foo/bootstrap.elf"),
|
||||
max_size: redox_initfs_tools::DEFAULT_MAX_SIZE,
|
||||
};
|
||||
redox_initfs_tools::archive(&args).context("failed to archive")?;
|
||||
|
||||
let data = std::fs::read(args.destination_path).context("failed to read new archive")?;
|
||||
let filesystem =
|
||||
redox_initfs::InitFs::new(&data, None).context("failed to parse archive header")?;
|
||||
let inode = filesystem
|
||||
.get_inode(filesystem.root_inode())
|
||||
.ok_or_else(|| anyhow!("Failed to get root inode"))?;
|
||||
|
||||
let tree = build_tree(filesystem, inode)?;
|
||||
|
||||
let reference_tree = Node::dir([(
|
||||
b"foo",
|
||||
Node::dir([
|
||||
(
|
||||
b"bootstrap.elf".as_slice(),
|
||||
Node::file("\x7FELF\x01\x01\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0"),
|
||||
),
|
||||
(b"file-link.txt".as_slice(), Node::link(b"file.txt")),
|
||||
(
|
||||
b"file.txt".as_slice(),
|
||||
Node::file(b"This is a file meant to be used in a redox-initfs test.\n"),
|
||||
),
|
||||
]),
|
||||
)]);
|
||||
|
||||
assert_eq!(tree, reference_tree);
|
||||
|
||||
Ok(())
|
||||
}
|
||||
Reference in New Issue
Block a user