Commit ae1374b7 authored by Zhu Lingshan's avatar Zhu Lingshan Committed by Michael S. Tsirkin
Browse files

vDPA: report virtio-block read-only info to user space 



This commit report read-only information of
virtio-blk devices to user space.

Signed-off-by: default avatarZhu Lingshan <lingshan.zhu@intel.com>
Message-Id: <20240218185606.13509-10-lingshan.zhu@intel.com>
Signed-off-by: default avatarMichael S. Tsirkin <mst@redhat.com>
parent 6bdc7846

drivers/vdpa/vdpa.c

+14 −0
Original line number Diff line number Diff line
@@ -1084,6 +1084,17 @@ vdpa_dev_blk_write_zeroes_config_fill(struct sk_buff *msg, u64 features, 
	return 0;

}



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

{

	u8 ro;



	ro = ((features & BIT_ULL(VIRTIO_BLK_F_RO)) == 0) ? 0 : 1;

	if (nla_put_u8(msg, VDPA_ATTR_DEV_BLK_CFG_READ_ONLY, ro))

		return -EMSGSIZE;



	return 0;

}



static int vdpa_dev_blk_config_fill(struct vdpa_device *vdev,

				    struct sk_buff *msg)

{
@@ -1122,6 +1133,9 @@ static int vdpa_dev_blk_config_fill(struct vdpa_device *vdev, 
	if (vdpa_dev_blk_write_zeroes_config_fill(msg, features_device, &config))

		return -EMSGSIZE;



	if (vdpa_dev_blk_ro_config_fill(msg, features_device))

		return -EMSGSIZE;



	return 0;

}

include/uapi/linux/vdpa.h

+1 −0
Original line number Diff line number Diff line
@@ -70,6 +70,7 @@ enum vdpa_attr { 
	VDPA_ATTR_DEV_BLK_CFG_DISCARD_SEC_ALIGN,/* u32 */

	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 */



	/* new attributes must be added above here */

	VDPA_ATTR_MAX,