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vmm: Add support for multiple virtio-net devices

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Until now, the VMM was only accepting a single instance of virtio-net
device. This commit extends the virtio-net support by allowing several
devices to be created for a single VM.

Fixes #71

Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
This commit is contained in:
Sebastien Boeuf 2019-07-08 15:31:13 -07:00 committed by Rob Bradford
parent a2947f9a9f
commit f0a76ad424
4 changed files with 103 additions and 42 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

78
src/main.rs
View File

@ -58,7 +58,8 @@ fn main() {
"Network parameters \"tap=<if_name>,\
ip=<ip_addr>,mask=<net_mask>,mac=<mac_addr>\"",
)
.takes_value(true),
.takes_value(true)
.min_values(1),
)
.arg(
Arg::with_name("rng")
@ -104,7 +105,7 @@ fn main() {
.expect("Missing argument: disk. Provide at least one")
.collect();
let net = cmd_arguments.value_of("net");
let net: Option<Vec<&str>> = cmd_arguments.values_of("net").map(|x| x.collect());
// This .unwrap() cannot fail as there is a default value defined
let rng = cmd_arguments.value_of("rng").unwrap();
@ -297,7 +298,10 @@ mod tests {
.args(&["--memory", "size=512M"])
.args(&["--kernel", fw_path.as_str()])
.args(&["--disk", disks[0], disks[1]])
.args(&["--net", "tap=,mac=,ip=192.168.2.1,mask=255.255.255.0"])
.args(&[
"--net",
"tap=,mac=12:34:56:78:90:ab,ip=192.168.2.1,mask=255.255.255.0",
])
.spawn()
.unwrap();
@ -325,7 +329,10 @@ mod tests {
.args(&["--memory", "size=512M"])
.args(&["--kernel", fw_path.as_str()])
.args(&["--disk", disks[0], disks[1]])
.args(&["--net", "tap=,mac=,ip=192.168.2.1,mask=255.255.255.0"])
.args(&[
"--net",
"tap=,mac=12:34:56:78:90:ab,ip=192.168.2.1,mask=255.255.255.0",
])
.spawn()
.unwrap();
@ -350,7 +357,10 @@ mod tests {
.args(&["--memory", "size=5120M"])
.args(&["--kernel", fw_path.as_str()])
.args(&["--disk", disks[0], disks[1]])
.args(&["--net", "tap=,mac=,ip=192.168.2.1,mask=255.255.255.0"])
.args(&[
"--net",
"tap=,mac=12:34:56:78:90:ab,ip=192.168.2.1,mask=255.255.255.0",
])
.spawn()
.unwrap();
@ -375,7 +385,10 @@ mod tests {
.args(&["--memory", "size=512M"])
.args(&["--kernel", fw_path.as_str()])
.args(&["--disk", disks[0], disks[1]])
.args(&["--net", "tap=,mac=,ip=192.168.2.1,mask=255.255.255.0"])
.args(&[
"--net",
"tap=,mac=12:34:56:78:90:ab,ip=192.168.2.1,mask=255.255.255.0",
])
.spawn()
.unwrap();
@ -413,7 +426,7 @@ mod tests {
.args(&["--memory", "size=512M"])
.args(&["--kernel", kernel_path.to_str().unwrap()])
.args(&["--disk", disks[0], disks[1]])
.args(&["--net", "tap=,mac=,ip=192.168.2.1,mask=255.255.255.0"])
.args(&["--net", "tap=,mac=12:34:56:78:90:ab,ip=192.168.2.1,mask=255.255.255.0"])
.args(&["--cmdline", "root=PARTUUID=3cb0e0a5-925d-405e-bc55-edf0cec8f10a console=tty0 console=ttyS0,115200n8 console=hvc0 quiet init=/usr/lib/systemd/systemd-bootchart initcall_debug tsc=reliable no_timer_check noreplace-smp cryptomgr.notests rootfstype=ext4,btrfs,xfs kvm-intel.nested=1 rw"])
.spawn()
.unwrap();
@ -455,7 +468,7 @@ mod tests {
.args(&["--memory", "size=512M"])
.args(&["--kernel", kernel_path.to_str().unwrap()])
.args(&["--disk", disks[0], disks[1]])
.args(&["--net", "tap=,mac=,ip=192.168.2.1,mask=255.255.255.0"])
.args(&["--net", "tap=,mac=12:34:56:78:90:ab,ip=192.168.2.1,mask=255.255.255.0"])
.args(&["--cmdline", "root=PARTUUID=3cb0e0a5-925d-405e-bc55-edf0cec8f10a console=tty0 console=ttyS0,115200n8 console=hvc0 quiet init=/usr/lib/systemd/systemd-bootchart initcall_debug tsc=reliable no_timer_check noreplace-smp cryptomgr.notests rootfstype=ext4,btrfs,xfs kvm-intel.nested=1 rw"])
.spawn()
.unwrap();
@ -491,7 +504,10 @@ mod tests {
.args(&["--memory", "size=512M"])
.args(&["--kernel", fw_path.as_str()])
.args(&["--disk", disks[0], disks[1]])
.args(&["--net", "tap=,mac=,ip=192.168.2.1,mask=255.255.255.0"])
.args(&[
"--net",
"tap=,mac=12:34:56:78:90:ab,ip=192.168.2.1,mask=255.255.255.0",
])
.spawn()
.unwrap();
@ -538,7 +554,7 @@ mod tests {
.args(&["--memory", "size=512M,file=/dev/shm"])
.args(&["--kernel", kernel_path.to_str().unwrap()])
.args(&["--disk", disks[0], disks[1]])
.args(&["--net", "tap=,mac=,ip=192.168.2.1,mask=255.255.255.0"])
.args(&["--net", "tap=,mac=12:34:56:78:90:ab,ip=192.168.2.1,mask=255.255.255.0"])
.args(&[
"--fs",
format!(
@ -608,7 +624,7 @@ mod tests {
.args(&["--memory", "size=512M"])
.args(&["--kernel", kernel_path.to_str().unwrap()])
.args(&["--disk", disks[0], disks[1]])
.args(&["--net", "tap=,mac=,ip=192.168.2.1,mask=255.255.255.0"])
.args(&["--net", "tap=,mac=12:34:56:78:90:ab,ip=192.168.2.1,mask=255.255.255.0"])
.args(&[
"--pmem",
format!(
@ -676,7 +692,7 @@ mod tests {
.args(&["--memory", "size=512M"])
.args(&["--kernel", kernel_path.to_str().unwrap()])
.args(&["--disk", disks[1]])
.args(&["--net", "tap=,mac=,ip=192.168.2.1,mask=255.255.255.0"])
.args(&["--net", "tap=,mac=12:34:56:78:90:ab,ip=192.168.2.1,mask=255.255.255.0"])
.args(&[
"--pmem",
format!(
@ -702,4 +718,42 @@ mod tests {
Ok(())
});
}
#[test]
fn test_multiple_network_interfaces() {
test_block!(tb, "", {
let (disks, fw_path) = prepare_files();
let mut child = Command::new("target/debug/cloud-hypervisor")
.args(&["--cpus", "1"])
.args(&["--memory", "size=512M"])
.args(&["--kernel", fw_path.as_str()])
.args(&["--disk", disks[0], disks[1]])
.args(&[
"--net",
"tap=,mac=12:34:56:78:90:ab,ip=192.168.2.1,mask=255.255.255.0",
"tap=,mac=8a:6b:6f:5a:de:ac,ip=192.168.3.1,mask=255.255.255.0",
"tap=,mac=fe:1f:9e:e1:60:f2,ip=192.168.4.1,mask=255.255.255.0",
])
.spawn()
.unwrap();
thread::sleep(std::time::Duration::new(10, 0));
// 3 network interfaces + default localhost ==> 4 interfaces
aver_eq!(
tb,
ssh_command("ip -o link | wc -l")
.trim()
.parse::<u32>()
.unwrap(),
4
);
ssh_command("sudo reboot");
thread::sleep(std::time::Duration::new(10, 0));
let _ = child.kill();
let _ = child.wait();
Ok(())
});
}
}

2
test_data/cloud-init/openstack/latest/user_data
View File

@ -10,7 +10,7 @@ write_files:
permissions: 0644
content: |
[Match]
Name=en*
MACAddress=12:34:56:78:90:ab
[Network]
Address=192.168.2.2/24

25
vmm/src/config.rs
View File

@ -59,7 +59,7 @@ pub struct VmParams<'a> {
pub kernel: &'a str,
pub cmdline: Option<&'a str>,
pub disks: Vec<&'a str>,
pub net: Option<&'a str>,
pub net: Option<Vec<&'a str>>,
pub rng: &'a str,
pub fs: Option<Vec<&'a str>>,
pub pmem: Option<Vec<&'a str>>,
@ -192,13 +192,9 @@ pub struct NetConfig<'a> {
}
impl<'a> NetConfig<'a> {
pub fn parse(net: Option<&'a str>) -> Result<Option<Self>> {
if net.is_none() {
return Ok(None);
}
pub fn parse(net: &'a str) -> Result<Self> {
// Split the parameters based on the comma delimiter
let params_list: Vec<&str> = net.unwrap().split(',').collect();
let params_list: Vec<&str> = net.split(',').collect();
let mut tap_str: &str = "";
let mut ip_str: &str = "";
@ -235,7 +231,7 @@ impl<'a> NetConfig<'a> {
mac = MacAddr::parse_str(mac_str).map_err(Error::ParseNetMacParam)?;
}
Ok(Some(NetConfig { tap, ip, mask, mac }))
Ok(NetConfig { tap, ip, mask, mac })
}
}
@ -348,7 +344,7 @@ pub struct VmConfig<'a> {
pub kernel: KernelConfig<'a>,
pub cmdline: CmdlineConfig,
pub disks: Vec<DiskConfig<'a>>,
pub net: Option<NetConfig<'a>>,
pub net: Option<Vec<NetConfig<'a>>>,
pub rng: RngConfig<'a>,
pub fs: Option<Vec<FsConfig<'a>>>,
pub pmem: Option<Vec<PmemConfig<'a>>>,
@ -361,6 +357,15 @@ impl<'a> VmConfig<'a> {
disks.push(DiskConfig::parse(disk)?);
}
let mut net: Option<Vec<NetConfig>> = None;
if let Some(net_list) = &vm_params.net {
let mut net_config_list = Vec::new();
for item in net_list.iter() {
net_config_list.push(NetConfig::parse(item)?);
}
net = Some(net_config_list);
}
let mut fs: Option<Vec<FsConfig>> = None;
if let Some(fs_list) = &vm_params.fs {
let mut fs_config_list = Vec::new();
@ -385,7 +390,7 @@ impl<'a> VmConfig<'a> {
kernel: KernelConfig::parse(vm_params.kernel)?,
cmdline: CmdlineConfig::parse(vm_params.cmdline)?,
disks,
net: NetConfig::parse(vm_params.net)?,
net,
rng: RngConfig::parse(vm_params.rng)?,
fs,
pmem,

40
vmm/src/vm.rs
View File

@ -567,28 +567,30 @@ impl DeviceManager {
}
// Add virtio-net if required
if let Some(net_cfg) = &vm_cfg.net {
let mut virtio_net_device: vm_virtio::Net;
if let Some(net_list_cfg) = &vm_cfg.net {
for net_cfg in net_list_cfg.iter() {
let mut virtio_net_device: vm_virtio::Net;
if let Some(tap_if_name) = net_cfg.tap {
let tap = Tap::open_named(tap_if_name).map_err(DeviceManagerError::OpenTap)?;
virtio_net_device = vm_virtio::Net::new_with_tap(tap, Some(&net_cfg.mac))
.map_err(DeviceManagerError::CreateVirtioNet)?;
} else {
virtio_net_device =
vm_virtio::Net::new(net_cfg.ip, net_cfg.mask, Some(&net_cfg.mac))
if let Some(tap_if_name) = net_cfg.tap {
let tap = Tap::open_named(tap_if_name).map_err(DeviceManagerError::OpenTap)?;
virtio_net_device = vm_virtio::Net::new_with_tap(tap, Some(&net_cfg.mac))
.map_err(DeviceManagerError::CreateVirtioNet)?;
}
} else {
virtio_net_device =
vm_virtio::Net::new(net_cfg.ip, net_cfg.mask, Some(&net_cfg.mac))
.map_err(DeviceManagerError::CreateVirtioNet)?;
}
DeviceManager::add_virtio_pci_device(
Box::new(virtio_net_device),
memory.clone(),
allocator,
vm_fd,
&mut pci,
&mut mmio_bus,
&interrupt_info,
)?;
DeviceManager::add_virtio_pci_device(
Box::new(virtio_net_device),
memory.clone(),
allocator,
vm_fd,
&mut pci,
&mut mmio_bus,
&interrupt_info,
)?;
}
}
// Add virtio-rng if required