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vmm: Add valid FDs for TAP devices to 'VmConfig::preserved_fds'

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In this way, valid FDs for TAP devices will be closed when the holding
VmConfig instance is destroyed.

Signed-off-by: Bo Chen <chen.bo@intel.com>
This commit is contained in:
Bo Chen 2023-04-14 17:47:58 -07:00 committed by Rob Bradford
parent 4baf85857a
commit a9623c7a28
1 changed files with 25 additions and 20 deletions
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45
vmm/src/device_manager.rs
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@ -2413,26 +2413,31 @@ impl DeviceManager {
.map_err(DeviceManagerError::CreateVirtioNet)?,
))
} else if let Some(fds) = &net_cfg.fds {
Arc::new(Mutex::new(
virtio_devices::Net::from_tap_fds(
id.clone(),
fds,
Some(net_cfg.mac),
net_cfg.mtu,
self.force_iommu | net_cfg.iommu,
net_cfg.queue_size,
self.seccomp_action.clone(),
net_cfg.rate_limiter_config,
self.exit_evt
.try_clone()
.map_err(DeviceManagerError::EventFd)?,
state,
net_cfg.offload_tso,
net_cfg.offload_ufo,
net_cfg.offload_csum,
)
.map_err(DeviceManagerError::CreateVirtioNet)?,
))
let net = virtio_devices::Net::from_tap_fds(
id.clone(),
fds,
Some(net_cfg.mac),
net_cfg.mtu,
self.force_iommu | net_cfg.iommu,
net_cfg.queue_size,
self.seccomp_action.clone(),
net_cfg.rate_limiter_config,
self.exit_evt
.try_clone()
.map_err(DeviceManagerError::EventFd)?,
state,
net_cfg.offload_tso,
net_cfg.offload_ufo,
net_cfg.offload_csum,
)
.map_err(DeviceManagerError::CreateVirtioNet)?;
// SAFETY: 'fds' are valid because TAP devices are created successfully
unsafe {
self.config.lock().unwrap().add_preserved_fds(fds.clone());
}
Arc::new(Mutex::new(net))
} else {
Arc::new(Mutex::new(
virtio_devices::Net::new(