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vm-virtio: Implement userspace_mappings() for virtio-fs

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This will help when we will implement the hot-unplug of the virtio-fs
device, as we will have to remove correctly the userspace mappings
associated with the device.

Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
This commit is contained in:
Sebastien Boeuf 2020-04-20 16:12:59 +02:00 committed by Rob Bradford
parent 3fb0a02fa2
commit b0353992d6
1 changed files with 17 additions and 2 deletions
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19
vm-virtio/src/vhost_user/fs.rs
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@ -6,8 +6,8 @@ use super::Error as DeviceError;
use super::{Error, Result};
use crate::vhost_user::handler::{VhostUserEpollConfig, VhostUserEpollHandler};
use crate::{
ActivateError, ActivateResult, Queue, VirtioDevice, VirtioDeviceType, VirtioInterrupt,
VirtioSharedMemoryList, VIRTIO_F_VERSION_1,
ActivateError, ActivateResult, Queue, UserspaceMapping, VirtioDevice, VirtioDeviceType,
VirtioInterrupt, VirtioSharedMemoryList, VIRTIO_F_VERSION_1,
};
use libc::{self, c_void, off64_t, pread64, pwrite64, EFD_NONBLOCK};
use std::cmp;
@ -567,6 +567,21 @@ impl VirtioDevice for Fs {
fn update_memory(&mut self, mem: &GuestMemoryMmap) -> std::result::Result<(), crate::Error> {
update_mem_table(&mut self.vu, mem).map_err(crate::Error::VhostUserUpdateMemory)
}
fn userspace_mappings(&self) -> Vec<UserspaceMapping> {
let mut mappings = Vec::new();
if let Some(cache) = self.cache.as_ref() {
mappings.push(UserspaceMapping {
host_addr: cache.0.host_addr,
mem_slot: cache.0.mem_slot,
addr: cache.0.addr,
len: cache.0.len,
mergeable: false,
})
}
mappings
}
}
virtio_pausable!(Fs);