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runtime-rs: ch: source virtio-fs queue size from toml

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Now that `prepare_virtiofs` populates `ShareFsConfig` from
`SharedFsInfo.virtio_fs_queue_size`, the CH-side fallback that
substitutes `DEFAULT_FS_QUEUE_SIZE` (1024) when the incoming
`queue_num`/`queue_size` are zero is no longer needed. Drop it from
both `handle_share_fs_device` and `TryFrom<ShareFsSettings> for
FsConfig` and use the values straight from the config. Drop the now
unused `DEFAULT_FS_QUEUES` and `DEFAULT_FS_QUEUE_SIZE` constants.

This also removes a latent bug in both call sites: the previous code
gated `queue_size` on `queue_num > 0`, so a user setting only the
queue size and not the (currently unconfigurable) queue count would
have had their `queue_size` silently overwritten by the default.

The CH config template (`configuration-clh-runtime-rs.toml.in`) did
not ship the `virtio_fs_queue_size` key (unlike the qemu-runtime-rs
templates), so without an explicit override the field would have
deserialized to 0 and the fallback would have been the only thing
keeping CH working. Add the key to the template, defaulted to
`@DEFVIRTIOFSQUEUESIZE@` (1024), matching the qemu-runtime-rs
templates.

Signed-off-by: Aurélien Bombo <abombo@microsoft.com>
This commit is contained in:
Aurélien Bombo
2026-05-01 15:11:42 -05:00
committed by Fabiano Fidêncio
parent 0d5bde2181
commit e2240b694a
2 changed files with 7 additions and 25 deletions
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3
src/runtime-rs/config/configuration-clh-runtime-rs.toml.in
View File

@@ -97,6 +97,9 @@ virtio_fs_daemon = "@DEFVIRTIOFSDAEMON@"
# Default size of DAX cache in MiB
virtio_fs_cache_size = @DEFVIRTIOFSCACHESIZE@
# Default size of virtqueues
virtio_fs_queue_size = @DEFVIRTIOFSQUEUESIZE@
# Extra args for virtiofsd daemon
#
# Format example:

29
src/runtime-rs/crates/hypervisor/src/ch/inner_device.rs
View File

@@ -45,9 +45,6 @@ use std::path::PathBuf;
const VIRTIO_FS: &str = "virtio-fs";
pub const DEFAULT_FS_QUEUES: usize = 1;
const DEFAULT_FS_QUEUE_SIZE: u16 = 1024;
impl CloudHypervisorInner {
pub(crate) async fn add_device(&mut self, device: DeviceType) -> Result<DeviceType> {
if self.state != VmmState::VmRunning {
@@ -143,17 +140,8 @@ impl CloudHypervisorInner {
));
}
let num_queues: usize = if device.config.queue_num > 0 {
device.config.queue_num as usize
} else {
DEFAULT_FS_QUEUES
};
let queue_size: u16 = if device.config.queue_num > 0 {
u16::try_from(device.config.queue_size)?
} else {
DEFAULT_FS_QUEUE_SIZE
};
let num_queues = device.config.queue_num as usize;
let queue_size = u16::try_from(device.config.queue_size)?;
let socket_path = if device.config.sock_path.starts_with('/') {
PathBuf::from(device.config.sock_path)
@@ -545,17 +533,8 @@ impl TryFrom<ShareFsSettings> for FsConfig {
let cfg = settings.cfg;
let vm_path = settings.vm_path;
let num_queues: usize = if cfg.queue_num > 0 {
cfg.queue_num as usize
} else {
DEFAULT_FS_QUEUES
};
let queue_size: u16 = if cfg.queue_num > 0 {
u16::try_from(cfg.queue_size)?
} else {
DEFAULT_FS_QUEUE_SIZE
};
let num_queues = cfg.queue_num as usize;
let queue_size = u16::try_from(cfg.queue_size)?;
let socket_path = if cfg.sock_path.starts_with('/') {
PathBuf::from(cfg.sock_path)