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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: Zhu Lingshan <lingshan.zhu@intel.com>
Message-Id: <20240218185606.13509-11-lingshan.zhu@intel.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
This commit is contained in:
Zhu Lingshan 2024-02-19 02:56:06 +08:00 committed by Michael S. Tsirkin
parent ae1374b7f7
commit 1ac61ddfee
2 changed files with 15 additions and 0 deletions
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14
drivers/vdpa/vdpa.c
View File

@ -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;
}

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

@ -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,