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2 commits

Author SHA1 Message Date
Daniel Verkamp
95a8868aef qcow: implement WriteZeroes for QcowFile 
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>
 2018-09-05 01:25:50 -07:00
Dylan Reid
76968703ad Add qcow support crate 
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>
 2018-01-19 23:29:52 -08:00