bug: VM driver fails to create rootfs for images with files >2 GiB due to mke2fs -d bug #1762

Adding the output after applying the following patch


diff --git a/crates/openshell-driver-vm/src/rootfs.rs b/crates/openshell-driver-vm/src/rootfs.rs
index 904ed8cd..cb3d222d 100644
--- a/crates/openshell-driver-vm/src/rootfs.rs
+++ b/crates/openshell-driver-vm/src/rootfs.rs
@@ -458,7 +458,7 @@ fn round_up_to_mib(bytes: u64) -> u64 {
 }
 
 fn format_ext4_image_from_dir(source: &Path, image_path: &Path) -> Result<(), String> {
-    let mut last_error = None;
+    let mut errors = Vec::new();
     for tool in ["mke2fs", "mkfs.ext4"] {
         for candidate in e2fs_tool_candidates(tool) {
             let label = candidate.display().to_string();
@@ -467,6 +467,8 @@ fn format_ext4_image_from_dir(source: &Path, image_path: &Path) -> Result<(), St
                 .arg("-F")
                 .arg("-t")
                 .arg("ext4")
+                .arg("-b")
+                .arg("4096")
                 .arg("-E")
                 .arg("root_owner=0:0")
                 .arg("-d")
@@ -476,7 +478,7 @@ fn format_ext4_image_from_dir(source: &Path, image_path: &Path) -> Result<(), St
             match output {
                 Ok(output) if output.status.success() => return Ok(()),
                 Ok(output) => {
-                    last_error = Some(format!(
+                    errors.push(format!(
                         "{label} failed with status {}\nstdout: {}\nstderr: {}",
                         output.status,
                         String::from_utf8_lossy(&output.stdout),
@@ -484,18 +486,18 @@ fn format_ext4_image_from_dir(source: &Path, image_path: &Path) -> Result<(), St
                     ));
                 }
                 Err(err) if err.kind() == std::io::ErrorKind::NotFound => {
-                    last_error = Some(format!("{label} not found"));
+                    errors.push(format!("{label} not found"));
                 }
                 Err(err) => {
-                    last_error = Some(format!("run {label}: {err}"));
+                    errors.push(format!("run {label}: {err} (kind: {:?})", err.kind()));
                 }
             }
         }
     }
     Err(format!(
-        "failed to create ext4 rootfs image from {}: {}. Install e2fsprogs (mke2fs/mkfs.ext4) and retry",
+        "failed to create ext4 rootfs image from {}: [{}]. Install e2fsprogs (mke2fs/mkfs.ext4) and retry",
         source.display(),
-        last_error.unwrap_or_else(|| "no ext4 formatter found".to_string())
+        errors.join("; ")
     ))
 }
 
@@ -736,6 +738,9 @@ fn run_debugfs(image_path: &Path, command: &str) -> Result<(), String> {
 
 fn e2fs_tool_candidates(tool: &str) -> Vec<PathBuf> {
     let mut candidates = vec![PathBuf::from(tool)];
+    for dir in ["/usr/sbin", "/sbin", "/usr/bin"] {
+        candidates.push(Path::new(dir).join(tool));
+    }
     for root in ["/opt/homebrew/opt/e2fsprogs", "/usr/local/opt/e2fsprogs"] {
         candidates.push(Path::new(root).join("sbin").join(tool));
         candidates.push(Path::new(root).join("bin").join(tool));


Output


✗ Error: ProvisioningFailed: failed to create ext4 rootfs image from /home/zakkak/.local/state/openshell/vm-driver/images/sandbox-prepared-rootfs-ext4-umoci-v3-openshell-0.0.56-dev.8-gb41e0df4-sha256-7f5f917046be984da8aa6821cff29b225138033bc0c0387730feca99c5e97b16.staging-1780583285334-0/.openshell-overlay-staging-357730-1780583291284: [mke2fs failed with status exit status: 1
stdout: 
stderr: __populate_fs: Ext2 file too big while writing file "source-rootfs.tar"
mke2fs: Ext2 file too big while populating file system
; /usr/sbin/mke2fs failed with status exit status: 1
stdout: 
stderr: __populate_fs: Ext2 file too big while writing file "source-rootfs.tar"
mke2fs: Ext2 file too big while populating file system
; /sbin/mke2fs failed with status exit status: 1
stdout: 
stderr: __populate_fs: Ext2 file too big while writing file "source-rootfs.tar"
mke2fs: Ext2 file too big while populating file system
; /usr/bin/mke2fs failed with status exit status: 1
stdout: 
stderr: __populate_fs: Ext2 file too big while writing file "source-rootfs.tar"
mke2fs: Ext2 file too big while populating file system
; /opt/homebrew/opt/e2fsprogs/sbin/mke2fs not found; /opt/homebrew/opt/e2fsprogs/bin/mke2fs not found; /usr/local/opt/e2fsprogs/sbin/mke2fs not found; /usr/local/opt/e2fsprogs/bin/mke2fs not found; mkfs.ext4 failed with status exit status: 1
stdout: 
stderr: __populate_fs: Ext2 file too big while writing file "source-rootfs.tar"
mkfs.ext4: Ext2 file too big while populating file system
; /usr/sbin/mkfs.ext4 failed with status exit status: 1
stdout: 
stderr: __populate_fs: Ext2 file too big while writing file "source-rootfs.tar"
mkfs.ext4: Ext2 file too big while populating file system
; /sbin/mkfs.ext4 failed with status exit status: 1
stdout: 
stderr: __populate_fs: Ext2 file too big while writing file "source-rootfs.tar"
mkfs.ext4: Ext2 file too big while populating file system
; /usr/bin/mkfs.ext4 failed with status exit status: 1
stdout: 
stderr: __populate_fs: Ext2 file too big while writing file "source-rootfs.tar"
mkfs.ext4: Ext2 file too big while populating file system
; /opt/homebrew/opt/e2fsprogs/sbin/mkfs.ext4 not found; /opt/homebrew/opt/e2fsprogs/bin/mkfs.ext4 not found; /usr/local/opt/e2fsprogs/sbin/mkfs.ext4 not found; /usr/local/opt/e2fsprogs/bin/mkfs.ext4 not found]. Install e2fsprogs (mke2fs/mkfs.ext4) and retry