diff options
| author | Zhu Lingshan <lingshan.zhu@intel.com> | 2024-02-19 02:55:58 +0800 |
|---|---|---|
| committer | Michael S. Tsirkin <mst@redhat.com> | 2024-03-19 02:45:51 -0400 |
| commit | 330b8aea692410fbe8f0d058e01aea2986613ff7 (patch) | |
| tree | f822ae43be1d9981bacb1db4ea2497a17fe48eef | |
| parent | c2475a9a789721bfdcc1b16aaf61ccfecb891914 (diff) | |
vDPA: report virtio-block max segment size to user space
This commit allows reporting the max size of any
single segment of virtio-block devices to user space.
Signed-off-by: Zhu Lingshan <lingshan.zhu@intel.com>
Message-Id: <20240218185606.13509-3-lingshan.zhu@intel.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
| -rw-r--r-- | drivers/vdpa/vdpa.c | 17 | ||||
| -rw-r--r-- | include/uapi/linux/vdpa.h | 1 |
2 files changed, 18 insertions, 0 deletions
diff --git a/drivers/vdpa/vdpa.c b/drivers/vdpa/vdpa.c index 613bec31f59e..db355d4683ba 100644 --- a/drivers/vdpa/vdpa.c +++ b/drivers/vdpa/vdpa.c @@ -956,6 +956,20 @@ vdpa_dev_blk_capacity_config_fill(struct sk_buff *msg, val_u64, VDPA_ATTR_PAD); } +static int +vdpa_dev_blk_seg_size_config_fill(struct sk_buff *msg, u64 features, + const struct virtio_blk_config *config) +{ + u32 val_u32; + + if ((features & BIT_ULL(VIRTIO_BLK_F_SIZE_MAX)) == 0) + return 0; + + val_u32 = __virtio32_to_cpu(true, config->size_max); + + return nla_put_u32(msg, VDPA_ATTR_DEV_BLK_CFG_SEG_SIZE, val_u32); +} + static int vdpa_dev_blk_config_fill(struct vdpa_device *vdev, struct sk_buff *msg) { @@ -973,6 +987,9 @@ static int vdpa_dev_blk_config_fill(struct vdpa_device *vdev, if (vdpa_dev_blk_capacity_config_fill(msg, &config)) return -EMSGSIZE; + if (vdpa_dev_blk_seg_size_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 1bf69226cb96..586bce3c906a 100644 --- a/include/uapi/linux/vdpa.h +++ b/include/uapi/linux/vdpa.h @@ -57,6 +57,7 @@ enum vdpa_attr { VDPA_ATTR_DEV_FEATURES, /* u64 */ VDPA_ATTR_DEV_BLK_CFG_CAPACITY, /* u64 */ + VDPA_ATTR_DEV_BLK_CFG_SEG_SIZE, /* u32 */ /* new attributes must be added above here */ VDPA_ATTR_MAX, |