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agent/device: Pass root bus sysfs path to pcipath_to_sysfs()

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Currently pcipath_to_sysfs() generates the path to the root bus node in
sysfs via create_pci_root_bus_path().  This is inconvenient for testing,
though, so instead make it take this as a parameter and generate the path
in the (single) caller.  As a bonus this will make life a bit easier when
we want to support machines with multiple PCI roots.

Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
This commit is contained in:
David Gibson 2021-02-09 10:58:30 +11:00
parent fda48a9bf0
commit 066ce7ab51
1 changed files with 3 additions and 3 deletions
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6
src/agent/src/device.rs
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@ -50,10 +50,9 @@ pub fn online_device(path: &str) -> Result<()> {
// pciPathToSysfs fetches the sysfs path for a PCI path, relative to
// the syfs path for the PCI host bridge, based on the PCI path
// provided.
fn pcipath_to_sysfs(pcipath: &pci::Path) -> Result<String> {
fn pcipath_to_sysfs(root_bus_sysfs: &str, pcipath: &pci::Path) -> Result<String> {
let mut bus = "0000:00".to_string();
let mut relpath = String::new();
let root_bus_sysfs = format!("{}{}", SYSFS_DIR, create_pci_root_bus_path());
for i in 0..pcipath.len() {
let bdf = format!("{}:{}.0", bus, pcipath[i]);
@ -148,7 +147,8 @@ pub async fn get_pci_device_name(
sandbox: &Arc<Mutex<Sandbox>>,
pcipath: &pci::Path,
) -> Result<String> {
let sysfs_rel_path = pcipath_to_sysfs(pcipath)?;
let root_bus_sysfs = format!("{}{}", SYSFS_DIR, create_pci_root_bus_path());
let sysfs_rel_path = pcipath_to_sysfs(&root_bus_sysfs, pcipath)?;
rescan_pci_bus()?;
get_device_name(sandbox, &sysfs_rel_path).await