CMGS f50b5ab1f2 block: qcow: Add aligned bounce buffers for O_DIRECT I/O ...

When the data file is opened with O_DIRECT, buffer address, length,
and file offset must satisfy the device alignment.

Add AlignedBuf RAII wrapper and aligned_pread/aligned_pwrite helpers
in qcow_common that use bounce buffers when alignment constraints
are not met. For writes with misaligned offset, a read modify write
is performed on the aligned region.

gather_from_iovecs_into gathers iovec data directly into a caller
provided buffer, avoiding an intermediate Vec allocation.

Fixes: #8007
Signed-off-by: CMGS <ilskdw@gmail.com>
Co-authored-by: Anatol Belski <anbelski@linux.microsoft.com>
Signed-off-by: Anatol Belski <anbelski@linux.microsoft.com>

2026-04-15 17:28:58 +00:00

..

src

block: qcow: Add aligned bounce buffers for O_DIRECT I/O

2026-04-15 17:28:58 +00:00

Cargo.toml

misc: make MSRV workspace-wide for cloud-hypervisor dependencies

2026-03-13 01:30:25 +00:00