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vDPA: report virtio-block write zeroes configuration to user space 

This commits reports write zeroes configuration of
virtio-block devices to user space, includes:
1)maximum write zeroes sectors size
2)maximum write zeroes segment number

Signed-off-by: Zhu Lingshan <lingshan.zhu@intel.com>
Message-Id: <20240218185606.13509-9-lingshan.zhu@intel.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
This commit is contained in:
Zhu Lingshan 2024-02-19 02:56:04 +08:00 committed by Michael S. Tsirkin
parent 65848f46e1
commit 6bdc7846e6
2 changed files with 25 additions and 0 deletions
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23
drivers/vdpa/vdpa.c
View File

@ -1064,6 +1064,26 @@ static int vdpa_dev_blk_discard_config_fill(struct sk_buff *msg, u64 features,
return 0;
}
static int
vdpa_dev_blk_write_zeroes_config_fill(struct sk_buff *msg, u64 features,
const struct virtio_blk_config *config)
{
u32 val_u32;
if ((features & BIT_ULL(VIRTIO_BLK_F_WRITE_ZEROES)) == 0)
return 0;
val_u32 = __virtio32_to_cpu(true, config->max_write_zeroes_sectors);
if (nla_put_u32(msg, VDPA_ATTR_DEV_BLK_CFG_MAX_WRITE_ZEROES_SEC, val_u32))
return -EMSGSIZE;
val_u32 = __virtio32_to_cpu(true, config->max_write_zeroes_seg);
if (nla_put_u32(msg, VDPA_ATTR_DEV_BLK_CFG_MAX_WRITE_ZEROES_SEG, val_u32))
return -EMSGSIZE;
return 0;
}
static int vdpa_dev_blk_config_fill(struct vdpa_device *vdev,
struct sk_buff *msg)
{
@ -1099,6 +1119,9 @@ static int vdpa_dev_blk_config_fill(struct vdpa_device *vdev,
if (vdpa_dev_blk_discard_config_fill(msg, features_device, &config))
return -EMSGSIZE;
if (vdpa_dev_blk_write_zeroes_config_fill(msg, features_device, &config))
return -EMSGSIZE;
return 0;
}

2
include/uapi/linux/vdpa.h
View File

@ -68,6 +68,8 @@ enum vdpa_attr {
VDPA_ATTR_DEV_BLK_CFG_MAX_DISCARD_SEC, /* u32 */
VDPA_ATTR_DEV_BLK_CFG_MAX_DISCARD_SEG, /* u32 */
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 */
/* new attributes must be added above here */
VDPA_ATTR_MAX,