Handle-Based I/O and Path Caching

.github/workflows/release.yml

@@ -0,0 +1,59 @@
+name: Release
+
+on:
+  push:
+    tags:
+      - 'v*'
+
+env:
+  CARGO_TERM_COLOR: always
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Set up Rust 1.80
+        uses: dtolnay/rust-toolchain@master
+        with:
+          toolchain: 1.80.1
+          targets: x86_64-unknown-linux-musl
+
+      - name: Install musl-tools
+        run: sudo apt-get update && sudo apt-get install -y musl-tools
+
+      - name: Cache cargo build
+        uses: actions/cache@v4
+        with:
+          path: |
+            ~/.cargo/registry
+            ~/.cargo/git
+            target
+          key: ${{ runner.os }}-cargo-musl-${{ hashFiles('**/Cargo.lock') }}
+
+      - name: Build release (static musl)
+        run: cargo build --release --target x86_64-unknown-linux-musl
+
+      - name: Strip binary
+        run: strip target/x86_64-unknown-linux-musl/release/pbkfs
+
+      - name: Get version from tag
+        id: version
+        run: echo "VERSION=${GITHUB_REF#refs/tags/}" >> $GITHUB_OUTPUT
+
+      - name: Prepare release artifact
+        run: |
+          mkdir -p release
+          cp target/x86_64-unknown-linux-musl/release/pbkfs release/pbkfs-${{ steps.version.outputs.VERSION }}-linux-x86_64
+          cd release && sha256sum pbkfs-* > checksums.txt
+
+      - name: Create GitHub Release
+        uses: softprops/action-gh-release@v2
+        with:
+          files: |
+            release/pbkfs-${{ steps.version.outputs.VERSION }}-linux-x86_64
+            release/checksums.txt
+          generate_release_notes: true
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}

Cargo.toml

@@ -29,6 +29,8 @@ flate2 = "1.0"
 lz4_flex = { version = "0.10", features = ["std"] }
 zstd = "0.13"
 crossbeam-channel = "0.5"
+dashmap = "6.1"
+parking_lot = "0.12"
 
 [dev-dependencies]
 tempfile = "3.10"

src/cli/mount.rs

@@ -9,7 +9,7 @@ use std::{
 
 use clap::Args;
 use serde_json;
-use tracing::{info, instrument, warn};
+use tracing::{debug, info, instrument, warn};
 
 use crate::{
     backup::{
@@ -272,6 +272,8 @@ pub fn mount(args: MountArgs) -> Result<MountContext> {
     }
 
     let overlay = Overlay::new_with_layers(&store.path, &diff_dir.path, layers)?;
+    let layer_roots = overlay.layer_roots();
+    debug!(?layer_roots, "overlay_layers_order");
 
     // Persist lock markers before mounting so writes hit the real FS, not the FUSE layer.
     let mut session = MountSession::new(binding.binding_id, &mnt_path);