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| author | Zhu Lingshan <lingshan.zhu@intel.com> | 2024-02-19 02:56:04 +0800 |
|---|---|---|
| committer | Michael S. Tsirkin <mst@redhat.com> | 2024-03-19 02:45:51 -0400 |
| commit | 6bdc7846e627ec21fc79a6d2554f69546a7b4985 (patch) | |
| tree | f794c5d7d50449c3268fcb51305470a590e24ecb | |
| parent | 65848f46e1d6c01fbd0d79a1c051d978a6e6002e (diff) | |
| download | lwn-6bdc7846e627ec21fc79a6d2554f69546a7b4985.tar.gz lwn-6bdc7846e627ec21fc79a6d2554f69546a7b4985.zip | |
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>
| -rw-r--r-- | drivers/vdpa/vdpa.c | 23 | ||||
| -rw-r--r-- | include/uapi/linux/vdpa.h | 2 |
2 files changed, 25 insertions, 0 deletions
diff --git a/drivers/vdpa/vdpa.c b/drivers/vdpa/vdpa.c index 9348818b8bf9..bcea9f880042 100644 --- a/drivers/vdpa/vdpa.c +++ b/drivers/vdpa/vdpa.c @@ -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; } diff --git a/include/uapi/linux/vdpa.h b/include/uapi/linux/vdpa.h index 30887931a220..797d5708492f 100644 --- a/include/uapi/linux/vdpa.h +++ b/include/uapi/linux/vdpa.h @@ -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, |