[PATCH 0/2] support BLKSECDISCARD

From: Yadong Qi Support BLKSECDISCARD passthrough for raw host_device backend. For virtio-blk device: Add new virtio feature: VIRTIO_BLK_F_SECDISCARD. Add new virtio command: VIRTIO_BLK_T_SECDISCARD. Usage: qemu-system-x86_64 \ ... \ -drive file=/dev/mmcblk0p2,if=none

[PATCH 1/2] block:hdev: support BLKSECDISCARD

From: Yadong Qi Add a new option "secdiscard" for block drive. Parse it and record it in bs->open_flags as bit(BDRV_O_SECDISCARD). Add a new BDRV_REQ_SECDISCARD bit for secure discard request from virtual device. For host_device backend: implement by ioctl(BLKSECDISCARD) on re

[PATCH 2/2] virtio-blk: support BLKSECDISCARD

From: Yadong Qi Add new virtio feature: VIRTIO_BLK_F_SECDISCARD. Add new virtio command: VIRTIO_BLK_T_SECDISCARD. This feature is disabled by default, it will check the backend bs->open_flags & BDRV_O_SECDISCARD, enable it if BDRV_O_SECDISCARD is supported. Signed-off-by: Yadong Qi