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ksud: Fix overlayfs mount

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weishu
2024-02-01 16:30:18 +08:00
parent 0fc25cf091
commit 4efc8164f1
1 changed files with 12 additions and 10 deletions
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22
userspace/ksud/src/mount.rs
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@@ -75,29 +75,31 @@ pub fn mount_ext4(source: impl AsRef<Path>, target: impl AsRef<Path>) -> Result<
#[cfg(any(target_os = "linux", target_os = "android"))]
pub fn umount_dir(src: impl AsRef<Path>) -> Result<()> {
unmount(src.as_ref(), UnmountFlags::empty()).with_context(|| format!("Failed to umount {}", src.as_ref().display()))?;
unmount(src.as_ref(), UnmountFlags::empty())
.with_context(|| format!("Failed to umount {}", src.as_ref().display()))?;
Ok(())
}
#[cfg(any(target_os = "linux", target_os = "android"))]
fn mount_overlayfs(
pub fn mount_overlayfs(
lower_dirs: &[String],
lowest: impl AsRef<Path>,
lowest: &str,
dest: impl AsRef<Path>,
) -> Result<()> {
let options = format!(
"lowerdir={}:{}",
lower_dirs.join(":"),
lowest.as_ref().display()
);
let lowerdir_config = lower_dirs
.iter()
.map(|s| s.as_ref())
.chain(std::iter::once(lowest))
.collect::<Vec<_>>()
.join(":");
info!(
"mount overlayfs on {}, options={}",
dest.as_ref().display(),
options
lowerdir_config
);
let fs = fsopen("overlay", FsOpenFlags::FSOPEN_CLOEXEC)?;
let fs = fs.as_fd();
fsconfig_set_string(fs, "lowerdir", lower_dirs.join(":"))?;
fsconfig_set_string(fs, "lowerdir", lowerdir_config)?;
fsconfig_set_string(fs, "source", KSU_OVERLAY_SOURCE)?;
fsconfig_create(fs)?;
let mount = fsmount(fs, FsMountFlags::FSMOUNT_CLOEXEC, MountAttrFlags::empty())?;