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Message-ID: <20240708064820.88955-2-lulu@redhat.com>
Date: Mon, 8 Jul 2024 14:47:02 +0800
From: Cindy Lu <lulu@...hat.com>
To: lulu@...hat.com,
dtatulea@...dia.com,
mst@...hat.com,
jasowang@...hat.com,
parav@...dia.com,
sgarzare@...hat.com,
netdev@...r.kernel.org,
virtualization@...ts.linux-foundation.org,
linux-kernel@...r.kernel.org,
kvm@...r.kernel.org
Subject: [PATCH v3 1/2] vdpa: support set mac address from vdpa tool
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 <lulu@...hat.com>
---
drivers/vdpa/vdpa.c | 81 +++++++++++++++++++++++++++++++++++++++
include/linux/vdpa.h | 9 +++++
include/uapi/linux/vdpa.h | 1 +
3 files changed, 91 insertions(+)
diff --git a/drivers/vdpa/vdpa.c b/drivers/vdpa/vdpa.c
index a7612e0783b3..ca97ad43e1bd 100644
--- a/drivers/vdpa/vdpa.c
+++ b/drivers/vdpa/vdpa.c
@@ -1149,6 +1149,82 @@ 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;
+
+ if (!vdev->mdev)
+ return -EINVAL;
+
+ down_write(&vdev->cf_lock);
+ if ((mdev->supported_features & BIT_ULL(VIRTIO_NET_F_MAC)) &&
+ 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]);
+ 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,
+ "features 0x%llx not supported",
+ BIT_ULL(VIRTIO_NET_F_MAC));
+ err = -EINVAL;
+ }
+ }
+ 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);
@@ -1285,6 +1361,11 @@ 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 db15ac07f8a6..14afa6d59098 100644
--- a/include/linux/vdpa.h
+++ b/include/linux/vdpa.h
@@ -576,11 +576,20 @@ 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 54b649ab0f22..76b3a1fd13f3 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
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