Hi, This is an alternative approach to changing null-co driver default 'read-zeroes' option to true: https://www.mail-archive.com/qemu-block@nongnu.org/msg80873.html
Instead we introduce yet another block driver with an explicit name: 'zeroes-co'. We then clarify in secure-coding-practices.rst that security reports have to be sent using this new driver. The 2nd patch is RFC because I won't spend time converting the tests until the first patch is discussed, as I already spent enough time doing that in the previous mentioned series. Regards, Phil. Philippe Mathieu-Daudé (3): block: Introduce the 'zeroes-co' driver tests/test-blockjob: Use zeroes-co instead of null-co,read-zeroes=on docs/secure-coding-practices: Describe null-co/zeroes-co block drivers docs/devel/secure-coding-practices.rst | 7 + block/zeroes.c | 306 +++++++++++++++++++++++++ tests/test-blockjob.c | 4 +- block/meson.build | 1 + 4 files changed, 315 insertions(+), 3 deletions(-) create mode 100644 block/zeroes.c -- 2.26.2