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block_util, vhdx: vhdx crate integration with the cloud hypervisor

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vhdx_sync.rs in block_util implements traits to represent the vhdx
crate as a supported block device in the cloud hypervisor. The vhdx
is added to the block device list in device_manager.rs at the vmm
crate so that it can automatically detect a vhdx disk and invoke the
corresponding crate.

Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
Signed-off-by: Fazla Mehrab <akm.fazla.mehrab@intel.com>
This commit is contained in:
Fazla Mehrab
2021-07-26 11:51:03 -04:00
committed by Sebastien Boeuf
parent 452af9b17c
commit 5db4dede28
8 changed files with 185 additions and 1 deletions
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5
block_util/src/lib.rs
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@@ -18,6 +18,7 @@ pub mod qcow_sync;
pub mod raw_async;
pub mod raw_sync;
pub mod vhd;
pub mod vhdx_sync;
use crate::async_io::{AsyncIo, AsyncIoError, AsyncIoResult, DiskFileError, DiskFileResult};
#[cfg(feature = "io_uring")]
@@ -602,9 +603,11 @@ pub enum ImageType {
FixedVhd,
Qcow2,
Raw,
Vhdx,
}
const QCOW_MAGIC: u32 = 0x5146_49fb;
const VHDX_SIGN: u64 = 0x656C_6966_7864_6876;
/// Determine image type through file parsing.
pub fn detect_image_type(f: &mut File) -> std::io::Result<ImageType> {
@@ -623,6 +626,8 @@ pub fn detect_image_type(f: &mut File) -> std::io::Result<ImageType> {
ImageType::Qcow2
} else if vhd::is_fixed_vhd(f)? {
ImageType::FixedVhd
} else if u64::from_le_bytes(s.data[0..8].try_into().unwrap()) == VHDX_SIGN {
ImageType::Vhdx
} else {
ImageType::Raw
};