Separated out of CL:1513058 to make it possible to land parts
individually while the affected crate has no other significant CLs
pending. This avoids repeatedly introducing non-textual conflicts with
new code that adds `use` statements.
TEST=cargo check
TEST=cargo check --all-features
TEST=cargo check --target aarch64-unknown-linux-gnu
Change-Id: Ief3fb967df340a99b8263ac185207e30e096105a
Reviewed-on: https://chromium-review.googlesource.com/1519704
Commit-Ready: David Tolnay <dtolnay@chromium.org>
Tested-by: David Tolnay <dtolnay@chromium.org>
Tested-by: kokoro <noreply+kokoro@google.com>
Reviewed-by: David Tolnay <dtolnay@chromium.org>
Add a simple implementation of WriteZeroes for QcowFile that just
writes zeroes to allocated clusters and skips clusters that are already
unallocated (since they already read back as zeroes).
BUG=chromium:850998
TEST=cargo test -p qcow
Change-Id: I8f26c8cc4016c129850aaf08c7188dfe08d6dacb
Signed-off-by: Daniel Verkamp <dverkamp@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/1187018
Reviewed-by: Dylan Reid <dgreid@chromium.org>
Reviewed-by: Zach Reizner <zachr@chromium.org>
QCOW2 files will be used to store the VM's data on ChromeOS. Add
support for basic reading and writing of qcow files.
CQ-DEPEND=CL:872451
BUG=none
TEST=qcow unit tests and use "qemu-image check" to verify generated qcow
files.
Change-Id: I4b9e77e58edca69f894ede19e79ebd2cd7b2623e
Signed-off-by: Dylan Reid <dgreid@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/862628
Reviewed-by: Stephen Barber <smbarber@chromium.org>
