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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: Zhu Lingshan <lingshan.zhu@intel.com>
Message-Id: <20240218185606.13509-10-lingshan.zhu@intel.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
This commit is contained in:
Zhu Lingshan 2024-02-19 02:56:05 +08:00 committed by Michael S. Tsirkin
parent 6bdc7846e6
commit ae1374b7f7
2 changed files with 15 additions and 0 deletions
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14
drivers/vdpa/vdpa.c
View File

@ -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;
}

1
include/uapi/linux/vdpa.h
View File

@ -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,