On Tue, 23 Jul 2024 at 14:01, Jason Wang <jasow...@redhat.com> wrote:
>
> On Tue, Jul 23, 2024 at 1:41 PM Cindy Lu <l...@redhat.com> wrote:
> >
> > Add new UAPI to support the mac address from vdpa tool
> > Function vdpa_nl_cmd_dev_attr_set_doit() will get the
> > new MAC address from the vdpa tool and then set it to the device.
> >
> > The usage is: vdpa dev set name vdpa_name mac **:**:**:**:**:**
> >
> > Here is example:
> > root@L1# vdpa -jp dev config show vdpa0
> > {
> > "config": {
> > "vdpa0": {
> > "mac": "82:4d:e9:5d:d7:e6",
> > "link ": "up",
> > "link_announce ": false,
> > "mtu": 1500
> > }
> > }
> > }
> >
> > root@L1# vdpa dev set name vdpa0 mac 00:11:22:33:44:55
> >
> > root@L1# vdpa -jp dev config show vdpa0
> > {
> > "config": {
> > "vdpa0": {
> > "mac": "00:11:22:33:44:55",
> > "link ": "up",
> > "link_announce ": false,
> > "mtu": 1500
> > }
> > }
> > }
> >
> > Signed-off-by: Cindy Lu <l...@redhat.com>
> > ---
> > drivers/vdpa/vdpa.c | 84 +++++++++++++++++++++++++++++++++++++++
> > include/linux/vdpa.h | 9 +++++
> > include/uapi/linux/vdpa.h | 1 +
> > 3 files changed, 94 insertions(+)
> >
> > diff --git a/drivers/vdpa/vdpa.c b/drivers/vdpa/vdpa.c
> > index 8d391947eb8d..07d61ee62839 100644
> > --- a/drivers/vdpa/vdpa.c
> > +++ b/drivers/vdpa/vdpa.c
> > @@ -1361,6 +1361,85 @@ static int vdpa_nl_cmd_dev_config_get_doit(struct
> > sk_buff *skb, struct genl_info
> > return err;
> > }
> >
> > +static int vdpa_dev_net_device_attr_set(struct vdpa_device *vdev,
> > + struct genl_info *info)
> > +{
> > + struct vdpa_dev_set_config set_config = {};
> > + const u8 *macaddr;
> > + struct vdpa_mgmt_dev *mdev = vdev->mdev;
> > + struct nlattr **nl_attrs = info->attrs;
> > + int err = -EINVAL;
> > +
> > + if (!vdev->mdev)
> > + return -EINVAL;
>
> It looks like the caller has already done this check?
>
sure, will remove this
> > +
> > + down_write(&vdev->cf_lock);
> > + if ((mdev->supported_features & BIT_ULL(VIRTIO_NET_F_MAC)) &&
>
> This is not a virtio feature, so I don't get why we need to check
> VIRTIO_NET_F_MAC.
>
will remove this
> > + nl_attrs[VDPA_ATTR_DEV_NET_CFG_MACADDR]) {
> > + set_config.mask |= BIT_ULL(VDPA_ATTR_DEV_NET_CFG_MACADDR);
> > + macaddr = nla_data(nl_attrs[VDPA_ATTR_DEV_NET_CFG_MACADDR]);
> > +
> > + if (is_valid_ether_addr(macaddr)) {
> > + memcpy(set_config.net.mac, macaddr, ETH_ALEN);
> > + if (mdev->ops->dev_set_attr) {
> > + err = mdev->ops->dev_set_attr(mdev, vdev,
> > + &set_config);
> > + } else {
> > + NL_SET_ERR_MSG_FMT_MOD(info->extack,
> > + "device not
> > supported");
>
> "Device does not support setting mac address" ?
>
sure, will change this
Thanks
cindy
> > + }
> > + } else {
> > + NL_SET_ERR_MSG_FMT_MOD(info->extack,
> > + "Invalid MAC address");
> > + }
> > + }
> > + up_write(&vdev->cf_lock);
> > + return err;
> > +}
> > +static int vdpa_nl_cmd_dev_attr_set_doit(struct sk_buff *skb,
> > + struct genl_info *info)
> > +{
> > + const char *name;
> > + int err = 0;
> > + struct device *dev;
> > + struct vdpa_device *vdev;
> > + u64 classes;
> > +
> > + if (!info->attrs[VDPA_ATTR_DEV_NAME])
> > + return -EINVAL;
> > +
> > + name = nla_data(info->attrs[VDPA_ATTR_DEV_NAME]);
> > +
> > + down_write(&vdpa_dev_lock);
> > + dev = bus_find_device(&vdpa_bus, NULL, name, vdpa_name_match);
> > + if (!dev) {
> > + NL_SET_ERR_MSG_MOD(info->extack, "device not found");
> > + err = -ENODEV;
> > + goto dev_err;
> > + }
> > + vdev = container_of(dev, struct vdpa_device, dev);
> > + if (!vdev->mdev) {
> > + NL_SET_ERR_MSG_MOD(
> > + info->extack,
> > + "Fail to find the specified management device");
> > + err = -EINVAL;
> > + goto mdev_err;
> > + }
> > + classes = vdpa_mgmtdev_get_classes(vdev->mdev, NULL);
> > + if (classes & BIT_ULL(VIRTIO_ID_NET)) {
> > + err = vdpa_dev_net_device_attr_set(vdev, info);
> > + } else {
> > + NL_SET_ERR_MSG_FMT_MOD(info->extack, "%s device not
> > supported",
> > + name);
> > + }
> > +
> > +mdev_err:
> > + put_device(dev);
> > +dev_err:
> > + up_write(&vdpa_dev_lock);
> > + return err;
> > +}
> > +
> > static int vdpa_dev_config_dump(struct device *dev, void *data)
> > {
> > struct vdpa_device *vdev = container_of(dev, struct vdpa_device,
> > dev);
> > @@ -1497,6 +1576,11 @@ static const struct genl_ops vdpa_nl_ops[] = {
> > .doit = vdpa_nl_cmd_dev_stats_get_doit,
> > .flags = GENL_ADMIN_PERM,
> > },
> > + {
> > + .cmd = VDPA_CMD_DEV_ATTR_SET,
> > + .doit = vdpa_nl_cmd_dev_attr_set_doit,
> > + .flags = GENL_ADMIN_PERM,
> > + },
> > };
> >
> > static struct genl_family vdpa_nl_family __ro_after_init = {
> > diff --git a/include/linux/vdpa.h b/include/linux/vdpa.h
> > index 7977ca03ac7a..3511156c10db 100644
> > --- a/include/linux/vdpa.h
> > +++ b/include/linux/vdpa.h
> > @@ -582,11 +582,20 @@ void vdpa_set_status(struct vdpa_device *vdev, u8
> > status);
> > * @dev: vdpa device to remove
> > * Driver need to remove the specified device by calling
> > * _vdpa_unregister_device().
> > + * @dev_set_attr: change a vdpa device's attr after it was create
> > + * @mdev: parent device to use for device
> > + * @dev: vdpa device structure
> > + * @config:Attributes to be set for the device.
> > + * The driver needs to check the mask of the structure and then
> > set
> > + * the related information to the vdpa device. The driver must
> > return 0
> > + * if set successfully.
> > */
> > struct vdpa_mgmtdev_ops {
> > int (*dev_add)(struct vdpa_mgmt_dev *mdev, const char *name,
> > const struct vdpa_dev_set_config *config);
> > void (*dev_del)(struct vdpa_mgmt_dev *mdev, struct vdpa_device
> > *dev);
> > + int (*dev_set_attr)(struct vdpa_mgmt_dev *mdev, struct vdpa_device
> > *dev,
> > + const struct vdpa_dev_set_config *config);
> > };
> >
> > /**
> > diff --git a/include/uapi/linux/vdpa.h b/include/uapi/linux/vdpa.h
> > index 842bf1201ac4..71edf2c70cc3 100644
> > --- a/include/uapi/linux/vdpa.h
> > +++ b/include/uapi/linux/vdpa.h
> > @@ -19,6 +19,7 @@ enum vdpa_command {
> > VDPA_CMD_DEV_GET, /* can dump */
> > VDPA_CMD_DEV_CONFIG_GET, /* can dump */
> > VDPA_CMD_DEV_VSTATS_GET,
> > + VDPA_CMD_DEV_ATTR_SET,
> > };
> >
> > enum vdpa_attr {
> > --
> > 2.45.0
> >
>
> Thanks
>
