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net: Do not check multiqueue for new interface

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If tun_flags file does not exist, check should not be fatal.

Signed-off-by: Jose Carlos Venegas Munoz <jose.carlos.venegas.munoz@intel.com>
This commit is contained in:
Jose Carlos Venegas Munoz 2020-03-05 17:15:41 +00:00 committed by Rob Bradford
parent 7d75b1f938
commit df794993f8
1 changed files with 5 additions and 0 deletions
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5
vm-virtio/src/net_util.rs
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@ -11,6 +11,7 @@ use std::io::{self, Write};
use std::mem;
use std::net::Ipv4Addr;
use std::os::unix::io::{AsRawFd, RawFd};
use std::path::Path;
use std::sync::atomic::{AtomicBool, Ordering};
use std::sync::Arc;
use virtio_bindings::bindings::virtio_net::*;
@ -465,6 +466,10 @@ fn check_mq_support(if_name: &Option<&str>, queue_pairs: usize) -> Result<()> {
if let Some(tap_name) = if_name {
let mq = queue_pairs > 1;
let path = format!("/sys/class/net/{}/tun_flags", tap_name);
// interface does not exist, check is not required
if !Path::new(&path).exists() {
return Ok(());
}
let tun_flags_str = fs::read_to_string(path).map_err(Error::ReadSysfsTunFlags)?;
let tun_flags = u32::from_str_radix(tun_flags_str.trim().trim_start_matches("0x"), 16)
.map_err(Error::ConvertHexStringToInt)?;