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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
..
src qcow: implement WriteZeroes for QcowFile 2018-09-05 01:25:50 -07:00
Cargo.toml qcow: implement WriteZeroes for QcowFile 2018-09-05 01:25:50 -07:00