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vmm: Add an identifier to the --fs device

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By giving the devices ids this effectively enables the removal of the
device.

Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
This commit is contained in:
Sebastien Boeuf 2020-04-27 09:55:25 +02:00 committed by Rob Bradford
parent 7e0ab6b56d
commit 9ed880d74e
2 changed files with 18 additions and 6 deletions
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8
vmm/src/config.rs
View File

@ -865,6 +865,8 @@ pub struct FsConfig {
pub dax: bool,
#[serde(default = "default_fsconfig_cache_size")]
pub cache_size: u64,
#[serde(default)]
pub id: Option<String>,
}
fn default_fsconfig_num_queues() -> usize {
@ -892,6 +894,7 @@ impl Default for FsConfig {
queue_size: default_fsconfig_queue_size(),
dax: default_fsconfig_dax(),
cache_size: default_fsconfig_cache_size(),
id: None,
}
}
}
@ -900,7 +903,7 @@ impl FsConfig {
pub const SYNTAX: &'static str = "virtio-fs parameters \
\"tag=<tag_name>,sock=<socket_path>,num_queues=<number_of_queues>,\
queue_size=<size_of_each_queue>,dax=on|off,cache_size=<DAX cache size: \
default 8Gib>\"";
default 8Gib>,id=<device_id>\"";
pub fn parse(fs: &str) -> Result<Self> {
let mut parser = OptionParser::new();
@ -941,6 +944,8 @@ impl FsConfig {
.unwrap_or_else(|| ByteSized(default_fsconfig_cache_size()))
.0;
let id = parser.get("id");
Ok(FsConfig {
tag,
sock,
@ -948,6 +953,7 @@ impl FsConfig {
queue_size,
dax,
cache_size,
id,
})
}
}

16
vmm/src/device_manager.rs
View File

@ -74,6 +74,7 @@ const MMIO_LEN: u64 = 0x1000;
const VFIO_DEVICE_NAME_PREFIX: &str = "vfio";
const DISK_DEVICE_NAME_PREFIX: &str = "disk";
const FS_DEVICE_NAME_PREFIX: &str = "fs";
const NET_DEVICE_NAME_PREFIX: &str = "net";
const PMEM_DEVICE_NAME_PREFIX: &str = "pmem";
const VSOCK_DEVICE_NAME_PREFIX: &str = "vsock";
@ -1426,8 +1427,12 @@ impl DeviceManager {
fn make_virtio_fs_device(
&mut self,
fs_cfg: &FsConfig,
fs_cfg: &mut FsConfig,
) -> DeviceManagerResult<(VirtioDeviceArc, bool, Option<String>)> {
if fs_cfg.id.is_none() {
fs_cfg.id = self.next_device_name(FS_DEVICE_NAME_PREFIX)?;
}
if let Some(fs_sock) = fs_cfg.sock.to_str() {
let cache = if fs_cfg.dax {
let fs_cache = fs_cfg.cache_size;
@ -1499,7 +1504,7 @@ impl DeviceManager {
Ok((
Arc::clone(&virtio_fs_device) as VirtioDeviceArc,
false,
None,
fs_cfg.id.clone(),
))
} else {
Err(DeviceManagerError::NoVirtioFsSock)
@ -1511,12 +1516,13 @@ impl DeviceManager {
) -> DeviceManagerResult<Vec<(VirtioDeviceArc, bool, Option<String>)>> {
let mut devices = Vec::new();
let fs_devices = self.config.lock().unwrap().fs.clone();
if let Some(fs_list_cfg) = &fs_devices {
for fs_cfg in fs_list_cfg.iter() {
let mut fs_devices = self.config.lock().unwrap().fs.clone();
if let Some(fs_list_cfg) = &mut fs_devices {
for fs_cfg in fs_list_cfg.iter_mut() {
devices.push(self.make_virtio_fs_device(fs_cfg)?);
}
}
self.config.lock().unwrap().fs = fs_devices;
Ok(devices)
}