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runtime-rs: Add support for configurable block device aio

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AIO is the I/O mechanism used by qemu with options:
- threads
  Pthread based disk I/O.
- native
  Native Linux I/O.
- io_uring (default mode)
  Linux io_uring API. This provides the fastest I/O operations on

Signed-off-by: alex.lyn <alex.lyn@antgroup.com>
This commit is contained in:
alex.lyn
2025-07-10 15:33:10 +08:00
parent 58925714d2
commit 125383e53c
2 changed files with 33 additions and 0 deletions
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3
src/libs/kata-types/src/config/default.rs
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@@ -37,6 +37,9 @@ pub const DEFAULT_INTERNETWORKING_MODEL: &str = "tcfilter";
pub const DEFAULT_BLOCK_DEVICE_TYPE: &str = "virtio-blk-pci";
pub const DEFAULT_VHOST_USER_STORE_PATH: &str = "/var/run/vhost-user";
pub const DEFAULT_BLOCK_NVDIMM_MEM_OFFSET: u64 = 0;
pub const DEFAULT_BLOCK_DEVICE_AIO_THREADS: &str = "threads";
pub const DEFAULT_BLOCK_DEVICE_AIO_NATIVE: &str = "native";
pub const DEFAULT_BLOCK_DEVICE_AIO: &str = "io_uring";
pub const DEFAULT_SHARED_FS_TYPE: &str = "virtio-fs";
pub const DEFAULT_VIRTIO_FS_CACHE_MODE: &str = "never";

30
src/libs/kata-types/src/config/hypervisor/mod.rs
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@@ -107,6 +107,21 @@ pub struct BlockDeviceInfo {
#[serde(default)]
pub block_device_driver: String,
/// Block device AIO is the I/O mechanism specially for Qemu
/// Options:
///
/// - threads
/// Pthread based disk I/O.
///
/// - native
/// Native Linux I/O.
///
/// - io_uring
/// Linux io_uring API. This provides the fastest I/O operations on Linux, requires kernel > 5.1 and
/// qemu >= 5.0.
#[serde(default)]
pub block_device_aio: String,
/// Specifies cache-related options will be set to block devices or not.
#[serde(default)]
pub block_device_cache_set: bool,
@@ -168,6 +183,21 @@ impl BlockDeviceInfo {
if self.block_device_driver.is_empty() {
self.block_device_driver = default::DEFAULT_BLOCK_DEVICE_TYPE.to_string();
}
if self.block_device_aio.is_empty() {
self.block_device_aio = default::DEFAULT_BLOCK_DEVICE_AIO.to_string();
} else {
const VALID_BLOCK_DEVICE_AIO: &[&str] = &[
default::DEFAULT_BLOCK_DEVICE_AIO,
default::DEFAULT_BLOCK_DEVICE_AIO_NATIVE,
default::DEFAULT_BLOCK_DEVICE_AIO_THREADS,
];
if !VALID_BLOCK_DEVICE_AIO.contains(&self.block_device_aio.as_str()) {
return Err(eother!(
"{} is unsupported block device AIO mode.",
self.block_device_aio
));
}
}
if self.memory_offset == 0 {
self.memory_offset = default::DEFAULT_BLOCK_NVDIMM_MEM_OFFSET;
}