Commit 1ac61ddf authored by Zhu Lingshan's avatar Zhu Lingshan Committed by Michael S. Tsirkin
Browse files

vDPA: report virtio-blk flush info to user space 



This commit reports whether a virtio-blk device
support cache flush command to user space

Signed-off-by: default avatarZhu Lingshan <lingshan.zhu@intel.com>
Message-Id: <20240218185606.13509-11-lingshan.zhu@intel.com>
Signed-off-by: default avatarMichael S. Tsirkin <mst@redhat.com>
parent ae1374b7

drivers/vdpa/vdpa.c

+14 −0
Original line number Diff line number Diff line
@@ -1095,6 +1095,17 @@ static int vdpa_dev_blk_ro_config_fill(struct sk_buff *msg, u64 features) 
	return 0;

}



static int vdpa_dev_blk_flush_config_fill(struct sk_buff *msg, u64 features)

{

	u8 flush;



	flush = ((features & BIT_ULL(VIRTIO_BLK_F_FLUSH)) == 0) ? 0 : 1;

	if (nla_put_u8(msg, VDPA_ATTR_DEV_BLK_CFG_FLUSH, flush))

		return -EMSGSIZE;



	return 0;

}



static int vdpa_dev_blk_config_fill(struct vdpa_device *vdev,

				    struct sk_buff *msg)

{
@@ -1136,6 +1147,9 @@ static int vdpa_dev_blk_config_fill(struct vdpa_device *vdev, 
	if (vdpa_dev_blk_ro_config_fill(msg, features_device))

		return -EMSGSIZE;



	if (vdpa_dev_blk_flush_config_fill(msg, features_device))

		return -EMSGSIZE;



	return 0;

}

include/uapi/linux/vdpa.h

+1 −0
Original line number Diff line number Diff line
@@ -71,6 +71,7 @@ enum vdpa_attr { 
	VDPA_ATTR_DEV_BLK_CFG_MAX_WRITE_ZEROES_SEC,	/* u32 */

	VDPA_ATTR_DEV_BLK_CFG_MAX_WRITE_ZEROES_SEG,	/* u32 */

	VDPA_ATTR_DEV_BLK_CFG_READ_ONLY,		/* u8 */

	VDPA_ATTR_DEV_BLK_CFG_FLUSH,		/* u8 */



	/* new attributes must be added above here */

	VDPA_ATTR_MAX,