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Merge pull request #10938 from Apokleos/fix-iommugrp-symlink

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runtime-rs: Simplify iommu group base name extraction from symlink
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Xuewei Niu 2025-04-09 19:23:48 +08:00 committed by GitHub
commit 5774f131ec
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1 changed files with 13 additions and 5 deletions
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18
src/runtime-rs/crates/hypervisor/src/device/driver/vfio.rs
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@ -5,6 +5,7 @@
//
use std::{
ffi::OsStr,
fs,
path::{Path, PathBuf},
process::Command,
@ -759,14 +760,21 @@ pub fn get_vfio_iommu_group(bdf: String) -> Result<String> {
let iommugrp_symlink = fs::read_link(&iommugrp_path)
.map_err(|e| anyhow!("read iommu group symlink failed {:?}", e))?;
// get base name from iommu group symlink: X
let iommu_group = get_base_name(iommugrp_symlink)?
.into_string()
.map_err(|e| anyhow!("failed to get iommu group {:?}", e))?;
// Just get base name from iommu group symlink is enough as it will be checked
// within the full path /sys/kernel/iommu_groups/$iommu_group in the subsequent step.
let iommu_group = iommugrp_symlink
.file_name()
.and_then(OsStr::to_str)
.ok_or_else(|| {
anyhow!(
"failed to get iommu group with symlink {:?}",
iommugrp_symlink
)
})?;
// we'd better verify the path to ensure it dose exist.
if !Path::new(SYS_KERN_IOMMU_GROUPS)
.join(&iommu_group)
.join(iommu_group)
.join("devices")
.join(dbdf.as_str())
.exists()