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agent/device: Add unit test for pcipath_to_sysfs()

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Port this test from the Kata 1 Go agent to the Kata 2 Rust agent.

Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
This commit is contained in:
David Gibson 2021-02-09 12:05:48 +11:00
parent 066ce7ab51
commit 87c5823c4b
1 changed files with 65 additions and 0 deletions
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65
src/agent/src/device.rs
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@ -435,6 +435,7 @@ pub fn update_device_cgroup(spec: &mut Spec) -> Result<()> {
mod tests {
use super::*;
use oci::Linux;
use tempfile::tempdir;
#[test]
fn test_update_device_cgroup() {
@ -714,4 +715,68 @@ mod tests {
assert_eq!(Some(host_major), specresources.devices[1].major);
assert_eq!(Some(host_minor), specresources.devices[1].minor);
}
#[test]
fn test_pcipath_to_sysfs() {
let testdir = tempdir().expect("failed to create tmpdir");
let rootbuspath = testdir.path().to_str().unwrap();
let path2 = pci::Path::from_str("02").unwrap();
let path23 = pci::Path::from_str("02/03").unwrap();
let path234 = pci::Path::from_str("02/03/04").unwrap();
let relpath = pcipath_to_sysfs(rootbuspath, &path2);
assert_eq!(relpath.unwrap(), "/0000:00:02.0");
let relpath = pcipath_to_sysfs(rootbuspath, &path23);
assert!(relpath.is_err());
let relpath = pcipath_to_sysfs(rootbuspath, &path234);
assert!(relpath.is_err());
// Create mock sysfs files for the device at 0000:00:02.0
let bridge2path = format!("{}{}", rootbuspath, "/0000:00:02.0");
fs::create_dir_all(&bridge2path).unwrap();
let relpath = pcipath_to_sysfs(rootbuspath, &path2);
assert_eq!(relpath.unwrap(), "/0000:00:02.0");
let relpath = pcipath_to_sysfs(rootbuspath, &path23);
assert!(relpath.is_err());
let relpath = pcipath_to_sysfs(rootbuspath, &path234);
assert!(relpath.is_err());
// Create mock sysfs files to indicate that 0000:00:02.0 is a bridge to bus 01
let bridge2bus = "0000:01";
let bus2path = format!("{}/pci_bus/{}", bridge2path, bridge2bus);
fs::create_dir_all(bus2path).unwrap();
let relpath = pcipath_to_sysfs(rootbuspath, &path2);
assert_eq!(relpath.unwrap(), "/0000:00:02.0");
let relpath = pcipath_to_sysfs(rootbuspath, &path23);
assert_eq!(relpath.unwrap(), "/0000:00:02.0/0000:01:03.0");
let relpath = pcipath_to_sysfs(rootbuspath, &path234);
assert!(relpath.is_err());
// Create mock sysfs files for a bridge at 0000:01:03.0 to bus 02
let bridge3path = format!("{}/0000:01:03.0", bridge2path);
let bridge3bus = "0000:02";
let bus3path = format!("{}/pci_bus/{}", bridge3path, bridge3bus);
fs::create_dir_all(bus3path).unwrap();
let relpath = pcipath_to_sysfs(rootbuspath, &path2);
assert_eq!(relpath.unwrap(), "/0000:00:02.0");
let relpath = pcipath_to_sysfs(rootbuspath, &path23);
assert_eq!(relpath.unwrap(), "/0000:00:02.0/0000:01:03.0");
let relpath = pcipath_to_sysfs(rootbuspath, &path234);
assert_eq!(relpath.unwrap(), "/0000:00:02.0/0000:01:03.0/0000:02:04.0");
}
}