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fix: harden stage1 path and archive identity

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This commit is contained in:
Valentin Popov
2026-06-30 01:40:47 +04:00
parent 7db0bf8e3d
commit 146446d3e2
3 changed files with 439 additions and 136 deletions
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crates/fparkan-path/src/lib.rs
+67 -6
View File
@@ -20,7 +20,9 @@
)]
//! Legacy path normalization and ASCII lookup semantics.
use std::cmp::Ordering;
use std::fmt;
use std::hash::{Hash, Hasher};
use std::path::{Path, PathBuf};
/// Original bytes.
@@ -42,23 +44,41 @@ impl OriginalPathBytes {
}
/// Normalized relative path.
#[derive(Clone, Debug, Eq, Ord, PartialEq, PartialOrd)]
#[derive(Clone, Debug)]
pub struct NormalizedPath {
raw: Vec<u8>,
display: String,
}
impl NormalizedPath {
/// Returns string view.
/// Returns normalized byte view used for identity, ordering, and hashing.
#[must_use]
pub fn as_str(&self) -> &str {
&self.display
pub fn identity_bytes(&self) -> &[u8] {
&self.raw
}
/// Returns an ASCII-only lookup key for case-insensitive archive matching.
#[must_use]
pub fn lookup_key(&self) -> LookupKey {
ascii_lookup_key(&self.raw)
}
/// Returns normalized byte view.
#[must_use]
pub fn as_bytes(&self) -> &[u8] {
&self.raw
self.identity_bytes()
}
/// Returns a lossy display representation.
#[must_use]
pub fn display_lossy(&self) -> &str {
&self.display
}
/// Returns a lossy string view for UI and diagnostics only.
#[must_use]
pub fn as_str(&self) -> &str {
self.display_lossy()
}
/// Returns an OS path owned path buffer.
@@ -68,6 +88,32 @@ impl NormalizedPath {
}
}
impl PartialEq for NormalizedPath {
fn eq(&self, other: &Self) -> bool {
self.raw == other.raw
}
}
impl Eq for NormalizedPath {}
impl PartialOrd for NormalizedPath {
fn partial_cmp(&self, other: &Self) -> Option<Ordering> {
Some(self.cmp(other))
}
}
impl Ord for NormalizedPath {
fn cmp(&self, other: &Self) -> Ordering {
self.raw.cmp(&other.raw)
}
}
impl Hash for NormalizedPath {
fn hash<H: Hasher>(&self, state: &mut H) {
self.raw.hash(state);
}
}
/// Normalized path paired with its original byte image.
#[derive(Clone, Debug, Eq, PartialEq)]
pub struct NormalizedPathWithOriginal {
@@ -353,7 +399,8 @@ mod tests {
let path = normalize_relative(b"DATA/\xFF.bin", PathPolicy::HostCompatible)
.expect("raw legacy bytes");
assert_eq!(path.as_str(), "DATA/\u{FFFD}.bin");
assert_eq!(path.display_lossy(), "DATA/\u{FFFD}.bin");
assert_eq!(path.identity_bytes(), b"DATA/\xFF.bin");
}
#[test]
@@ -364,4 +411,18 @@ mod tests {
assert_eq!(path.normalized().as_str(), "DATA/Maps/Intro/Land.msh");
assert_eq!(path.original().as_bytes(), raw);
}
#[test]
fn lossy_display_does_not_affect_identity_or_ordering() {
let first = normalize_relative(b"DATA/\xFF.bin", PathPolicy::HostCompatible)
.expect("first raw path");
let second = normalize_relative(b"DATA/\xFE.bin", PathPolicy::HostCompatible)
.expect("second raw path");
assert_eq!(first.display_lossy(), second.display_lossy());
assert_ne!(first, second);
assert_ne!(first.identity_bytes(), second.identity_bytes());
assert_ne!(first.cmp(&second), Ordering::Equal);
assert_ne!(first.lookup_key(), second.lookup_key());
}
}
crates/fparkan-resource/src/lib.rs
+247 -61
View File
@@ -20,7 +20,7 @@
)]
//! Resource identity and repository ports.
use fparkan_binary::Sha256Digest;
use fparkan_binary::{sha256, Sha256Digest};
use fparkan_path::{normalize_relative, NormalizedPath, PathPolicy, ResourceName};
use fparkan_vfs::{Vfs, VfsError};
use std::collections::BTreeMap;
@@ -222,6 +222,30 @@ pub struct CachedResourceRepository {
state: Mutex<RepositoryState>,
}
/// Repository-wide archive and payload cache limits.
#[derive(Clone, Copy, Debug, Eq, PartialEq)]
pub struct RepositoryLimits {
/// Maximum number of decoded archives retained in memory.
pub max_open_archives: usize,
/// Maximum total retained source archive bytes.
pub max_archive_bytes: usize,
/// Maximum cached decoded payload entries.
pub max_decoded_payload_entries: usize,
/// Maximum cached decoded payload bytes.
pub max_decoded_payload_bytes: usize,
}
impl Default for RepositoryLimits {
fn default() -> Self {
Self {
max_open_archives: 32,
max_archive_bytes: 256 * 1024 * 1024,
max_decoded_payload_entries: 64,
max_decoded_payload_bytes: 64 * 1024 * 1024,
}
}
}
/// Decoded payload cache limits.
#[derive(Clone, Copy, Debug, Eq, PartialEq)]
pub struct PayloadCacheLimits {
@@ -233,17 +257,23 @@ pub struct PayloadCacheLimits {
impl Default for PayloadCacheLimits {
fn default() -> Self {
let limits = RepositoryLimits::default();
Self {
max_entries: 64,
max_bytes: 64 * 1024 * 1024,
max_entries: limits.max_decoded_payload_entries,
max_bytes: limits.max_decoded_payload_bytes,
}
}
}
#[derive(Default)]
struct RepositoryState {
paths: BTreeMap<String, ArchiveId>,
paths: BTreeMap<Vec<u8>, ArchiveId>,
archives: Vec<ArchiveSlot>,
max_open_archives: usize,
max_archive_bytes: usize,
current_open_archives: usize,
current_archive_bytes: usize,
archive_access_generation: u64,
payload_cache: DecodedPayloadCache,
}
@@ -252,7 +282,9 @@ struct ArchiveSlot {
fingerprint: Sha256Digest,
generation: u64,
kind: ArchiveKind,
document: Arc<ArchiveDocument>,
document: Option<Arc<ArchiveDocument>>,
archive_bytes: usize,
last_access: u64,
}
enum ArchiveDocument {
@@ -284,31 +316,41 @@ impl CachedResourceRepository {
/// Creates a cached repository.
#[must_use]
pub fn new(vfs: Arc<dyn Vfs>) -> Self {
Self::with_payload_cache_limits(vfs, PayloadCacheLimits::default())
Self::with_limits(vfs, RepositoryLimits::default())
}
/// Creates a cached repository with explicit archive and payload budgets.
#[must_use]
pub fn with_limits(vfs: Arc<dyn Vfs>, limits: RepositoryLimits) -> Self {
Self {
vfs,
state: Mutex::new(RepositoryState {
max_open_archives: limits.max_open_archives,
max_archive_bytes: limits.max_archive_bytes,
payload_cache: DecodedPayloadCache::new(PayloadCacheLimits {
max_entries: limits.max_decoded_payload_entries,
max_bytes: limits.max_decoded_payload_bytes,
}),
..RepositoryState::default()
}),
}
}
/// Creates a cached repository with a decoded payload entry budget.
#[must_use]
pub fn with_payload_cache_budget(vfs: Arc<dyn Vfs>, max_payload_entries: usize) -> Self {
Self::with_payload_cache_limits(
vfs,
PayloadCacheLimits {
max_entries: max_payload_entries,
..PayloadCacheLimits::default()
},
)
let mut limits = RepositoryLimits::default();
limits.max_decoded_payload_entries = max_payload_entries;
Self::with_limits(vfs, limits)
}
/// Creates a cached repository with decoded payload entry and byte budgets.
#[must_use]
pub fn with_payload_cache_limits(vfs: Arc<dyn Vfs>, limits: PayloadCacheLimits) -> Self {
Self {
vfs,
state: Mutex::new(RepositoryState {
payload_cache: DecodedPayloadCache::new(limits),
..RepositoryState::default()
}),
}
let mut repository_limits = RepositoryLimits::default();
repository_limits.max_decoded_payload_entries = limits.max_entries;
repository_limits.max_decoded_payload_bytes = limits.max_bytes;
Self::with_limits(vfs, repository_limits)
}
/// Returns the archive kind for an opened archive.
@@ -334,29 +376,38 @@ impl CachedResourceRepository {
impl ResourceRepository for CachedResourceRepository {
fn open_archive(&self, path: &NormalizedPath) -> Result<ArchiveId, ResourceError> {
let metadata = self.vfs.metadata(path).map_err(resource_error_from_vfs)?;
let fingerprint = metadata.fingerprint;
if let Some(id) = self.cached_id(path, fingerprint)? {
return Ok(id);
}
let bytes = self.vfs.read(path).map_err(resource_error_from_vfs)?;
let fingerprint = sha256(&bytes);
let mut slot = decode_archive(path.clone(), bytes, fingerprint)?;
let mut state = self.state.lock().map_err(|_| ResourceError::Poisoned)?;
if let Some(id) = state.paths.get(path.as_str()).copied() {
if state.archive(id)?.fingerprint == fingerprint {
let key = path.identity_bytes().to_vec();
if let Some(id) = state.paths.get(&key).copied() {
let current = state.archive(id)?;
if current.fingerprint == fingerprint && current.document.is_some() {
state.touch_archive(id)?;
return Ok(id);
}
slot.generation = state.archive(id)?.generation.saturating_add(1);
let current_generation = current.generation;
let current_fingerprint = current.fingerprint;
if current_fingerprint != fingerprint {
slot.generation = current_generation.saturating_add(1);
state.payload_cache.remove_archive(id);
} else {
slot.generation = current_generation;
}
state.unload_archive(id)?;
*state.archive_mut(id)? = slot;
state.payload_cache.remove_archive(id);
state.load_archive(id)?;
state.evict_archives(id)?;
return Ok(id);
}
let id = ArchiveId(u64::try_from(state.archives.len()).map_err(|_| {
ResourceError::Format("too many open archives for handle space".to_string())
})?);
state.paths.insert(path.as_str().to_string(), id);
state.paths.insert(key, id);
state.archives.push(slot);
state.load_archive(id)?;
state.evict_archives(id)?;
Ok(id)
}
@@ -367,7 +418,8 @@ impl ResourceRepository for CachedResourceRepository {
) -> Result<Option<EntryHandle>, ResourceError> {
let state = self.state.lock().map_err(|_| ResourceError::Poisoned)?;
let slot = state.archive(archive)?;
let local = match slot.document.as_ref() {
let document = slot.document.as_ref().ok_or(ResourceError::InvalidHandle)?;
let local = match document.as_ref() {
ArchiveDocument::Nres(document) => document.find_bytes(&name.0).map(|id| id.0),
ArchiveDocument::Rsli(document) => document.find_bytes(&name.0).map(|id| id.0),
};
@@ -381,7 +433,8 @@ impl ResourceRepository for CachedResourceRepository {
fn first_entry(&self, archive: ArchiveId) -> Result<Option<EntryHandle>, ResourceError> {
let state = self.state.lock().map_err(|_| ResourceError::Poisoned)?;
let slot = state.archive(archive)?;
let local = match slot.document.as_ref() {
let document = slot.document.as_ref().ok_or(ResourceError::InvalidHandle)?;
let local = match document.as_ref() {
ArchiveDocument::Nres(document) => document.entries().first().map(|entry| entry.id().0),
ArchiveDocument::Rsli(document) => document.entry(fparkan_rsli::EntryId(0)).map(|_| 0),
};
@@ -421,7 +474,8 @@ impl ResourceRepository for CachedResourceRepository {
fn entry_info(&self, entry: EntryHandle) -> Result<ResourceEntryInfo, ResourceError> {
let state = self.state.lock().map_err(|_| ResourceError::Poisoned)?;
let slot = state.entry_archive(entry)?;
match slot.document.as_ref() {
let document = slot.document.as_ref().ok_or(ResourceError::InvalidHandle)?;
match document.as_ref() {
ArchiveDocument::Nres(document) => {
let local =
usize::try_from(entry.local).map_err(|_| ResourceError::InvalidHandle)?;
@@ -448,7 +502,7 @@ impl ResourceRepository for CachedResourceRepository {
Ok(ResourceEntryInfo {
key: ResourceKey {
archive: slot.path.clone(),
name: ResourceName(meta.name_raw.to_vec()),
name: ResourceName(c_name_bytes(&meta.name_raw).to_vec()),
type_id: None,
},
attr1: u32::try_from(meta.flags).unwrap_or_default(),
@@ -460,24 +514,6 @@ impl ResourceRepository for CachedResourceRepository {
}
}
impl CachedResourceRepository {
fn cached_id(
&self,
path: &NormalizedPath,
fingerprint: Sha256Digest,
) -> Result<Option<ArchiveId>, ResourceError> {
let state = self.state.lock().map_err(|_| ResourceError::Poisoned)?;
let Some(id) = state.paths.get(path.as_str()).copied() else {
return Ok(None);
};
if state.archive(id)?.fingerprint == fingerprint {
Ok(Some(id))
} else {
Ok(None)
}
}
}
impl DecodedPayloadCache {
fn new(limits: PayloadCacheLimits) -> Self {
Self {
@@ -568,16 +604,77 @@ impl RepositoryState {
fn payload_decode_task(&self, entry: EntryHandle) -> Result<PayloadDecodeTask, ResourceError> {
let slot = self.entry_archive(entry)?;
let document = slot.document.as_ref().ok_or(ResourceError::InvalidHandle)?;
Ok(PayloadDecodeTask {
document: Arc::clone(&slot.document),
document: Arc::clone(document),
key: slot.entry_key(entry.local)?,
})
}
fn touch_archive(&mut self, id: ArchiveId) -> Result<(), ResourceError> {
self.archive_access_generation = self.archive_access_generation.saturating_add(1);
let access = self.archive_access_generation;
self.archive_mut(id)?.last_access = access;
Ok(())
}
fn load_archive(&mut self, id: ArchiveId) -> Result<(), ResourceError> {
let archive_bytes = self.archive(id)?.archive_bytes;
if self.archive(id)?.document.is_none() {
return Err(ResourceError::InvalidHandle);
}
self.current_open_archives = self.current_open_archives.saturating_add(1);
self.current_archive_bytes = self.current_archive_bytes.saturating_add(archive_bytes);
self.touch_archive(id)
}
fn unload_archive(&mut self, id: ArchiveId) -> Result<(), ResourceError> {
let (was_loaded, archive_bytes) = {
let slot = self.archive(id)?;
(slot.document.is_some(), slot.archive_bytes)
};
if was_loaded {
self.current_open_archives = self.current_open_archives.saturating_sub(1);
self.current_archive_bytes = self.current_archive_bytes.saturating_sub(archive_bytes);
self.payload_cache.remove_archive(id);
let slot = self.archive_mut(id)?;
slot.document = None;
slot.archive_bytes = 0;
slot.generation = slot.generation.saturating_add(1);
}
Ok(())
}
fn evict_archives(&mut self, protected: ArchiveId) -> Result<(), ResourceError> {
while self.current_open_archives > self.max_open_archives
|| self.current_archive_bytes > self.max_archive_bytes
{
let Some(victim) = self
.archives
.iter()
.enumerate()
.filter_map(|(index, slot)| {
let id = ArchiveId(u64::try_from(index).ok()?);
if id == protected || slot.document.is_none() {
return None;
}
Some((id, slot.last_access))
})
.min_by_key(|(_, access)| *access)
.map(|(id, _)| id)
else {
break;
};
self.unload_archive(victim)?;
}
Ok(())
}
}
impl ArchiveSlot {
fn entry_key(&self, local: u32) -> Result<ResourceKey, ResourceError> {
match self.document.as_ref() {
let document = self.document.as_ref().ok_or(ResourceError::InvalidHandle)?;
match document.as_ref() {
ArchiveDocument::Nres(document) => {
let local = usize::try_from(local).map_err(|_| ResourceError::InvalidHandle)?;
let entry = document
@@ -623,6 +720,7 @@ fn decode_archive(
bytes: Arc<[u8]>,
fingerprint: Sha256Digest,
) -> Result<ArchiveSlot, ResourceError> {
let archive_bytes = bytes.len();
if bytes.starts_with(b"NRes") {
let document = fparkan_nres::decode(bytes, fparkan_nres::ReadProfile::Compatible)
.map_err(|err| ResourceError::Format(err.to_string()))?;
@@ -631,7 +729,9 @@ fn decode_archive(
fingerprint,
generation: 0,
kind: ArchiveKind::Nres,
document: Arc::new(ArchiveDocument::Nres(document)),
archive_bytes,
last_access: 0,
document: Some(Arc::new(ArchiveDocument::Nres(document))),
});
}
if bytes.get(0..4) == Some(b"NL\0\x01") {
@@ -642,7 +742,9 @@ fn decode_archive(
fingerprint,
generation: 0,
kind: ArchiveKind::Rsli,
document: Arc::new(ArchiveDocument::Rsli(document)),
archive_bytes,
last_access: 0,
document: Some(Arc::new(ArchiveDocument::Rsli(document))),
});
}
Err(ResourceError::Format(
@@ -780,7 +882,7 @@ mod tests {
let state = repo.state.lock().expect("state");
assert_eq!(state.archives.len(), 1);
assert_eq!(state.payload_cache.entries.len(), 1);
assert_eq!(state.paths.get(path.as_str()).copied(), Some(archive));
assert_eq!(state.paths.get(path.identity_bytes()).copied(), Some(archive));
drop(state);
assert_eq!(repo.open_archive(&path).expect("cached archive"), archive);
@@ -865,7 +967,7 @@ mod tests {
fn archive_cache_invalidates_when_vfs_bytes_change() {
let root = temp_dir("archive-invalidate");
let path = archive_path(b"cache/test.lib").expect("path");
let host_path = root.join(path.as_str());
let host_path = root.join(path.as_path());
std::fs::create_dir_all(host_path.parent().expect("parent")).expect("cache dir");
std::fs::write(&host_path, build_nres(&[("a.bin", b"before".as_slice())]))
.expect("initial archive");
@@ -926,6 +1028,90 @@ mod tests {
}
}
#[test]
fn lossy_equivalent_archive_paths_remain_distinct() {
let first_path = archive_path(b"DATA/\xFF.lib").expect("first path");
let second_path = archive_path(b"DATA/\xFE.lib").expect("second path");
let mut vfs = MemoryVfs::default();
vfs.insert(
first_path.clone(),
Arc::from(build_nres(&[("same.bin", b"first".as_slice())]).into_boxed_slice()),
);
vfs.insert(
second_path.clone(),
Arc::from(build_nres(&[("same.bin", b"second".as_slice())]).into_boxed_slice()),
);
let repo = CachedResourceRepository::new(Arc::new(vfs));
let first_archive = repo.open_archive(&first_path).expect("first archive");
let second_archive = repo.open_archive(&second_path).expect("second archive");
assert_ne!(first_archive, second_archive);
assert_eq!(
repo.read(
repo.find(first_archive, &resource_name(b"same.bin"))
.expect("find first")
.expect("first handle")
)
.expect("read first")
.as_slice(),
b"first"
);
assert_eq!(
repo.read(
repo.find(second_archive, &resource_name(b"same.bin"))
.expect("find second")
.expect("second handle")
)
.expect("read second")
.as_slice(),
b"second"
);
}
#[test]
fn archive_cache_eviction_makes_old_handles_stale() {
let first_path = archive_path(b"cache/first.lib").expect("first path");
let second_path = archive_path(b"cache/second.lib").expect("second path");
let mut vfs = MemoryVfs::default();
vfs.insert(
first_path.clone(),
Arc::from(build_nres(&[("a.bin", b"first".as_slice())]).into_boxed_slice()),
);
vfs.insert(
second_path.clone(),
Arc::from(build_nres(&[("b.bin", b"second".as_slice())]).into_boxed_slice()),
);
let repo = CachedResourceRepository::with_limits(
Arc::new(vfs),
RepositoryLimits {
max_open_archives: 1,
max_archive_bytes: usize::MAX,
max_decoded_payload_entries: 64,
max_decoded_payload_bytes: 64 * 1024 * 1024,
},
);
let first_archive = repo.open_archive(&first_path).expect("open first");
let first_handle = repo
.find(first_archive, &resource_name(b"a.bin"))
.expect("find first")
.expect("first handle");
assert_eq!(repo.read(first_handle).expect("read first").as_slice(), b"first");
let _second_archive = repo.open_archive(&second_path).expect("open second");
assert!(matches!(repo.read(first_handle), Err(ResourceError::StaleHandle)));
let reopened = repo.open_archive(&first_path).expect("reopen first");
let refreshed = repo
.find(reopened, &resource_name(b"a.bin"))
.expect("find refreshed")
.expect("refreshed handle");
assert_eq!(reopened, first_archive);
assert_ne!(refreshed, first_handle);
assert_eq!(repo.read(refreshed).expect("read refreshed").as_slice(), b"first");
}
#[test]
fn resource_error_display_is_actionable() {
let path = archive_path(b"bad/rsli.lib").expect("path");
@@ -974,7 +1160,7 @@ mod tests {
let material_path = archive_path(b"Material.lib").map_err(|err| err.to_string())?;
let material_bytes =
std::fs::read(root.join(material_path.as_str())).map_err(|err| err.to_string())?;
std::fs::read(root.join(material_path.as_path())).map_err(|err| err.to_string())?;
let material_doc = fparkan_nres::decode(
Arc::from(material_bytes.clone().into_boxed_slice()),
fparkan_nres::ReadProfile::Compatible,
@@ -1008,7 +1194,7 @@ mod tests {
let font_path = archive_path(b"gamefont.rlb").map_err(|err| err.to_string())?;
let font_bytes =
std::fs::read(root.join(font_path.as_str())).map_err(|err| err.to_string())?;
std::fs::read(root.join(font_path.as_path())).map_err(|err| err.to_string())?;
let font_doc = fparkan_rsli::decode(
Arc::from(font_bytes.into_boxed_slice()),
fparkan_rsli::ReadProfile::Compatible,
crates/fparkan-vfs/src/lib.rs
+125 -69
View File
@@ -25,12 +25,13 @@ use fparkan_path::{ascii_lookup_key, join_under, NormalizedPath};
use std::collections::BTreeMap;
use std::fs;
#[cfg(unix)]
use std::os::unix::ffi::OsStrExt;
#[cfg(unix)]
use std::os::unix::fs::MetadataExt;
#[cfg(windows)]
use std::os::windows::fs::MetadataExt;
use std::path::{Path, PathBuf};
use std::sync::{Arc, Mutex};
use std::time::SystemTime;
use std::sync::Arc;
/// VFS metadata.
#[derive(Clone, Debug, Eq, PartialEq)]
@@ -105,7 +106,6 @@ pub trait Vfs: Send + Sync {
#[derive(Clone, Debug)]
pub struct DirectoryVfs {
root: PathBuf,
fingerprint_cache: Arc<Mutex<BTreeMap<PathBuf, CachedHostFingerprint>>>,
}
impl DirectoryVfs {
@@ -114,29 +114,20 @@ impl DirectoryVfs {
pub fn new(root: impl AsRef<Path>) -> Self {
Self {
root: root.as_ref().to_path_buf(),
fingerprint_cache: Arc::default(),
}
}
fn host_path(&self, path: &NormalizedPath) -> Result<PathBuf, VfsError> {
join_under(&self.root, path).map_err(|_| VfsError::Path)?;
resolve_casefolded(&self.root, path.as_str())
resolve_casefolded(&self.root, path)
}
fn metadata_from_host_file(&self, path: &Path) -> Result<VfsMetadata, VfsError> {
let metadata = fs::symlink_metadata(path).map_err(VfsError::Io)?;
metadata_from_host_file_with_cache(path, &metadata, &self.fingerprint_cache)
metadata_from_host_file(path, &metadata)
}
}
#[derive(Clone, Debug, Eq, PartialEq)]
struct CachedHostFingerprint {
len: u64,
modified: Option<SystemTime>,
identity: Option<u64>,
fingerprint: Sha256Digest,
}
impl Vfs for DirectoryVfs {
fn metadata(&self, path: &NormalizedPath) -> Result<VfsMetadata, VfsError> {
self.metadata_from_host_file(&self.host_path(path)?)
@@ -171,21 +162,60 @@ impl Vfs for DirectoryVfs {
let metadata = fs::symlink_metadata(&base).map_err(VfsError::Io)?;
entries.push(VfsEntry {
path: prefix.clone(),
metadata: metadata_from_host_file_with_cache(
&base,
&metadata,
&self.fingerprint_cache,
)?,
metadata: metadata_from_host_file(&base, &metadata)?,
});
return Ok(entries);
}
list_recursive(&self.root, &base, &self.fingerprint_cache, &mut entries)?;
entries.sort_by(|a, b| a.path.as_str().cmp(b.path.as_str()));
list_recursive(&self.root, &base, &mut entries)?;
entries.sort_by(|a, b| a.path.as_bytes().cmp(b.path.as_bytes()));
Ok(entries)
}
}
fn resolve_casefolded(root: &Path, normalized: &str) -> Result<PathBuf, VfsError> {
fn resolve_casefolded(root: &Path, normalized: &NormalizedPath) -> Result<PathBuf, VfsError> {
#[cfg(unix)]
{
return resolve_casefolded_unix(root, normalized);
}
#[cfg(not(unix))]
{
resolve_casefolded_text(root, normalized.display_lossy())
}
}
#[cfg(unix)]
fn resolve_casefolded_unix(root: &Path, normalized: &NormalizedPath) -> Result<PathBuf, VfsError> {
let mut current = root.to_path_buf();
for segment in normalized.as_bytes().split(|byte| *byte == b'/') {
current = resolve_casefolded_segment(&current, segment, normalized)?;
}
Ok(current)
}
#[cfg(unix)]
fn resolve_casefolded_segment(
dir: &Path,
segment: &[u8],
normalized: &NormalizedPath,
) -> Result<PathBuf, VfsError> {
let read_dir = fs::read_dir(dir).map_err(VfsError::Io)?;
let mut matches = Vec::new();
for entry in read_dir {
let entry = entry.map_err(VfsError::Io)?;
let name = entry.file_name();
if name.as_bytes().eq_ignore_ascii_case(segment) {
if entry.file_type().map_err(VfsError::Io)?.is_symlink() {
return Err(VfsError::Path);
}
matches.push(entry.path());
}
}
select_casefolded_match(normalized.display_lossy(), dir, segment, matches)
}
#[cfg(not(unix))]
fn resolve_casefolded_text(root: &Path, normalized: &str) -> Result<PathBuf, VfsError> {
let mut current = root.to_path_buf();
for segment in normalized.split('/') {
let read_dir = fs::read_dir(&current).map_err(VfsError::Io)?;
@@ -211,10 +241,11 @@ fn resolve_casefolded(root: &Path, normalized: &str) -> Result<PathBuf, VfsError
fn select_casefolded_match(
normalized: &str,
current: &Path,
segment: &str,
segment: impl AsRef<[u8]>,
mut matches: Vec<PathBuf>,
) -> Result<PathBuf, VfsError> {
matches.sort();
let segment = String::from_utf8_lossy(segment.as_ref());
match matches.len() {
0 => Err(VfsError::NotFound(normalized.to_string())),
1 => Ok(matches.remove(0)),
@@ -229,7 +260,6 @@ fn select_casefolded_match(
fn list_recursive(
root: &Path,
dir: &Path,
fingerprint_cache: &Mutex<BTreeMap<PathBuf, CachedHostFingerprint>>,
out: &mut Vec<VfsEntry>,
) -> Result<(), VfsError> {
let read_dir = fs::read_dir(dir).map_err(VfsError::Io)?;
@@ -245,68 +275,40 @@ fn list_recursive(
return Err(VfsError::Path);
}
if metadata.is_dir() {
list_recursive(root, &child, fingerprint_cache, out)?;
list_recursive(root, &child, out)?;
continue;
}
if !metadata.is_file() {
continue;
}
let rel = child.strip_prefix(root).map_err(|_| VfsError::Path)?;
let rel_text = rel.to_str().ok_or(VfsError::Path)?;
#[cfg(unix)]
let rel_bytes = rel.as_os_str().as_bytes();
#[cfg(not(unix))]
let rel_bytes = rel.to_str().ok_or(VfsError::Path)?.as_bytes();
let path = fparkan_path::normalize_relative(
rel_text.as_bytes(),
rel_bytes,
fparkan_path::PathPolicy::HostCompatible,
)
.map_err(|_| VfsError::Path)?;
out.push(VfsEntry {
path,
metadata: metadata_from_host_file_with_cache(&child, &metadata, fingerprint_cache)?,
metadata: metadata_from_host_file(&child, &metadata)?,
});
}
Ok(())
}
fn metadata_from_host_file_with_cache(
fn metadata_from_host_file(
path: &Path,
metadata: &fs::Metadata,
fingerprint_cache: &Mutex<BTreeMap<PathBuf, CachedHostFingerprint>>,
) -> Result<VfsMetadata, VfsError> {
if !metadata.is_file() {
return Err(VfsError::Path);
}
let len = metadata.len();
let modified = metadata.modified().ok();
if let Some(cached) = fingerprint_cache
.lock()
.map_err(|_| VfsError::Path)?
.get(path)
.cloned()
.filter(|cached| {
cached.len == len
&& cached.modified == modified
&& cached.identity == file_identity(metadata)
})
{
return Ok(VfsMetadata {
len,
fingerprint: cached.fingerprint,
});
}
let bytes = fs::read(path).map_err(VfsError::Io)?;
let fingerprint = sha256(&bytes);
fingerprint_cache
.lock()
.map_err(|_| VfsError::Path)?
.insert(
path.to_path_buf(),
CachedHostFingerprint {
len,
modified,
identity: file_identity(metadata),
fingerprint,
},
);
Ok(VfsMetadata { len, fingerprint })
}
@@ -344,11 +346,11 @@ impl MemoryVfs {
let matches = self
.lookup
.get(&key)
.ok_or_else(|| VfsError::NotFound(path.as_str().to_string()))?;
.ok_or_else(|| VfsError::NotFound(path.display_lossy().to_string()))?;
match matches.as_slice() {
[single] => Ok(single.as_slice()),
[] => Err(VfsError::NotFound(path.as_str().to_string())),
_ => Err(VfsError::Ambiguous(path.as_str().to_string())),
[] => Err(VfsError::NotFound(path.display_lossy().to_string())),
_ => Err(VfsError::Ambiguous(path.display_lossy().to_string())),
}
}
}
@@ -380,7 +382,7 @@ impl Vfs for MemoryVfs {
let bytes = self
.files
.get(resolved)
.ok_or_else(|| VfsError::NotFound(path.as_str().to_string()))?;
.ok_or_else(|| VfsError::NotFound(path.display_lossy().to_string()))?;
Ok(VfsMetadata {
len: bytes.len() as u64,
fingerprint: sha256(bytes),
@@ -392,7 +394,7 @@ impl Vfs for MemoryVfs {
self.files
.get(resolved)
.cloned()
.ok_or_else(|| VfsError::NotFound(path.as_str().to_string()))
.ok_or_else(|| VfsError::NotFound(path.display_lossy().to_string()))
}
fn list(&self, prefix: &NormalizedPath) -> Result<Vec<VfsEntry>, VfsError> {
@@ -476,7 +478,7 @@ impl Vfs for OverlayVfs {
Err(err) => return Err(err),
}
}
Err(VfsError::NotFound(path.as_str().to_string()))
Err(VfsError::NotFound(path.display_lossy().to_string()))
}
fn read(&self, path: &NormalizedPath) -> Result<Arc<[u8]>, VfsError> {
@@ -487,7 +489,7 @@ impl Vfs for OverlayVfs {
Err(err) => return Err(err),
}
}
Err(VfsError::NotFound(path.as_str().to_string()))
Err(VfsError::NotFound(path.display_lossy().to_string()))
}
fn list(&self, prefix: &NormalizedPath) -> Result<Vec<VfsEntry>, VfsError> {
@@ -496,7 +498,7 @@ impl Vfs for OverlayVfs {
match layer.list(prefix) {
Ok(entries) => {
for entry in entries {
let key = entry.path.as_str().to_ascii_uppercase();
let key = ascii_lookup_key(entry.path.as_bytes()).0;
by_key.entry(key).or_insert(entry);
}
}
@@ -505,7 +507,7 @@ impl Vfs for OverlayVfs {
}
}
let mut entries: Vec<_> = by_key.into_values().collect();
entries.sort_by(|a, b| a.path.as_str().cmp(b.path.as_str()));
entries.sort_by(|a, b| a.path.as_bytes().cmp(b.path.as_bytes()));
Ok(entries)
}
}
@@ -514,6 +516,10 @@ impl Vfs for OverlayVfs {
mod tests {
use super::*;
use fparkan_path::{normalize_relative, PathPolicy};
#[cfg(unix)]
use std::ffi::OsString;
#[cfg(unix)]
use std::os::unix::ffi::OsStringExt;
#[test]
fn directory_vfs_resolves_ascii_casefolded_segments() {
@@ -634,6 +640,34 @@ mod tests {
std::fs::remove_dir_all(outside).expect("cleanup outside");
}
#[cfg(unix)]
#[test]
fn directory_vfs_resolves_non_utf8_host_entries_by_raw_bytes() {
let root = unique_test_dir("non-utf8");
let data_dir = root.join("DATA");
std::fs::create_dir_all(&data_dir).expect("mkdir");
let file_name = OsString::from_vec(vec![0xFF, b'.', b'b', b'i', b'n']);
let raw_path = data_dir.join(&file_name);
if let Err(err) = std::fs::write(&raw_path, b"raw") {
assert_eq!(err.kind(), std::io::ErrorKind::PermissionDenied);
std::fs::remove_dir_all(root).expect("cleanup");
return;
}
let vfs = DirectoryVfs::new(&root);
let path =
normalize_relative(b"data/\xFF.bin", PathPolicy::HostCompatible).expect("path");
assert_eq!(vfs.read(&path).expect("read raw path").as_ref(), b"raw");
let entries = vfs
.list(&normalize_relative(b"DATA", PathPolicy::StrictLegacy).expect("prefix"))
.expect("list");
assert_eq!(entries.len(), 1);
assert_eq!(entries[0].path.identity_bytes(), b"DATA/\xFF.bin");
std::fs::remove_dir_all(root).expect("cleanup");
}
#[test]
fn casefold_selector_reports_ambiguous_segments() {
let err = select_casefolded_match(
@@ -714,6 +748,28 @@ mod tests {
assert_eq!(entries[0].metadata.len, 4);
}
#[test]
fn overlay_vfs_keeps_lossy_equivalent_entries_distinct() {
let prefix = normalize_relative(b"DATA", PathPolicy::StrictLegacy).expect("prefix");
let mut high = MemoryVfs::default();
let mut low = MemoryVfs::default();
high.insert(
normalize_relative(b"DATA/\xFF.bin", PathPolicy::HostCompatible).expect("high path"),
Arc::from(b"high".as_slice()),
);
low.insert(
normalize_relative(b"DATA/\xFE.bin", PathPolicy::HostCompatible).expect("low path"),
Arc::from(b"low".as_slice()),
);
let overlay = OverlayVfs::from_layers(vec![Arc::new(high), Arc::new(low)]);
let entries = overlay.list(&prefix).expect("list");
assert_eq!(entries.len(), 2);
assert_eq!(entries[0].path.display_lossy(), entries[1].path.display_lossy());
assert_ne!(entries[0].path.identity_bytes(), entries[1].path.identity_bytes());
}
fn unique_test_dir(name: &str) -> PathBuf {
let mut path = std::env::temp_dir();
path.push(format!("fparkan-vfs-{name}-{}", std::process::id()));