$ vdpa dev add name bar mgmtdev vdpasim_net
$ vdpa dev config set bar mac 00:11:22:33:44:55 mtu 9000
$ vdpa dev config show
bar: mac 00:11:22:33:44:55 link up link_announce false mtu 9000 speed 0 duplex 0
$ vdpa dev config show -jp
{
"config": {
"bar": {
"mac": "00:11:22:33:44:55",
"link ": "up",
"link_announce ": false,
"mtu": 9000,
"speed": 0,
"duplex": 0
}
}
}
Signed-off-by: Parav Pandit <parav@xxxxxxxxxx>
Reviewed-by: Eli Cohen <elic@xxxxxxxxxx>
---
changelog:
v1->v2:
- fixed mtu range checking for max
- using NLA_POLICY_ETH_ADDR
- set config moved to device ops instead of mgmtdev ops
- merged build and set to single routine
- ensuring that user has NET_ADMIN capability for configuring network
attributes
---
drivers/vdpa/vdpa.c | 90 +++++++++++++++++++++++++++++++++++++++
include/linux/vdpa.h | 15 +++++++
include/uapi/linux/vdpa.h | 1 +
3 files changed, 106 insertions(+)
diff --git a/drivers/vdpa/vdpa.c b/drivers/vdpa/vdpa.c
index 9da8deb8c0f2..6a6ef1a085e8 100644
--- a/drivers/vdpa/vdpa.c
+++ b/drivers/vdpa/vdpa.c
@@ -881,10 +881,94 @@ vdpa_nl_cmd_dev_config_get_dumpit(struct sk_buff *msg, struct netlink_callback *
return msg->len;
}
+static int vdpa_dev_net_config_set(struct vdpa_device *vdev,
+ struct sk_buff *skb, struct genl_info *info)
+{
+ struct nlattr **nl_attrs = info->attrs;
+ struct vdpa_dev_set_config config = {};
+ const u8 *macaddr;
+ int err;
+
+ if (!vdev->config->set_ce_config)
+ return -EOPNOTSUPP;
+
+ if (!netlink_capable(skb, CAP_NET_ADMIN))
+ return -EPERM;
+
+ if (nl_attrs[VDPA_ATTR_DEV_NET_CFG_MACADDR]) {
+ macaddr = nla_data(nl_attrs[VDPA_ATTR_DEV_NET_CFG_MACADDR]);
+ memcpy(config.net.mac, macaddr, sizeof(config.net.mac));
+ config.net_mask.mac_valid = true;
+ }
+ if (nl_attrs[VDPA_ATTR_DEV_NET_CFG_MTU]) {
+ config.net.mtu =
+ nla_get_u16(nl_attrs[VDPA_ATTR_DEV_NET_CFG_MTU]);
+ config.net_mask.mtu_valid = true;
+ }
+
+ mutex_lock(&vdev->cf_mutex);
+ err = vdev->config->set_ce_config(vdev, &config);
+ mutex_unlock(&vdev->cf_mutex);
+ return err;
+}
+
+static int vdpa_dev_config_set(struct vdpa_device *vdev, struct sk_buff *skb,
+ struct genl_info *info)
+{
+ int err = -EOPNOTSUPP;
+ u32 device_id;
+
+ if (!vdev->mdev)
+ return -EOPNOTSUPP;
+
+ device_id = vdev->config->get_device_id(vdev);
+ switch (device_id) {
+ case VIRTIO_ID_NET:
+ err = vdpa_dev_net_config_set(vdev, skb, info);
+ break;
+ default:
+ break;
+ }
+ return err;
+}
+
+static int vdpa_nl_cmd_dev_config_set_doit(struct sk_buff *skb, struct genl_info *info)
+{
+ struct vdpa_device *vdev;
+ const char *devname;
+ struct device *dev;
+ int err;
+
+ if (!info->attrs[VDPA_ATTR_DEV_NAME])
+ return -EINVAL;
+ devname = nla_data(info->attrs[VDPA_ATTR_DEV_NAME]);
+
+ mutex_lock(&vdpa_dev_mutex);
+ dev = bus_find_device(&vdpa_bus, NULL, devname, vdpa_name_match);
+ if (!dev) {
+ mutex_unlock(&vdpa_dev_mutex);
+ NL_SET_ERR_MSG_MOD(info->extack, "device not found");
+ return -ENODEV;
+ }
+ vdev = container_of(dev, struct vdpa_device, dev);
+ if (!vdev->mdev) {
+ mutex_unlock(&vdpa_dev_mutex);
+ put_device(dev);
+ return -EINVAL;
+ }
+ err = vdpa_dev_config_set(vdev, skb, info);
+ put_device(dev);
+ mutex_unlock(&vdpa_dev_mutex);
+ return err;
+}
+
static const struct nla_policy vdpa_nl_policy[VDPA_ATTR_MAX + 1] = {
[VDPA_ATTR_MGMTDEV_BUS_NAME] = { .type = NLA_NUL_STRING },
[VDPA_ATTR_MGMTDEV_DEV_NAME] = { .type = NLA_STRING },
[VDPA_ATTR_DEV_NAME] = { .type = NLA_STRING },
+ [VDPA_ATTR_DEV_NET_CFG_MACADDR] = NLA_POLICY_ETH_ADDR,
+ /* virtio spec 1.1 section 5.1.4.1 for valid MTU range */
+ [VDPA_ATTR_DEV_NET_CFG_MTU] = NLA_POLICY_MIN(NLA_U16, 68),
};
static const struct genl_ops vdpa_nl_ops[] = {
@@ -919,6 +1003,12 @@ static const struct genl_ops vdpa_nl_ops[] = {
.dumpit = vdpa_nl_cmd_dev_config_get_dumpit,
.flags = GENL_ADMIN_PERM,
},
+ {
+ .cmd = VDPA_CMD_DEV_CONFIG_SET,
+ .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
+ .doit = vdpa_nl_cmd_dev_config_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 dcbbecb5dea8..b59e1a214161 100644
--- a/include/linux/vdpa.h
+++ b/include/linux/vdpa.h
@@ -104,6 +104,14 @@ struct vdpa_dev_config {
struct vdpa_net_dev_config net;
};
+struct vdpa_dev_set_config {
+ struct vdpa_net_dev_config net;
+ struct {
+ u8 mac_valid: 1;
+ u8 mtu_valid: 1;
+ } net_mask;
+};
+
/**
* struct vdpa_config_ops - operations for configuring a vDPA device.
* Note: vDPA device drivers are required to implement all of the
@@ -204,6 +212,11 @@ struct vdpa_dev_config {
* cpu endianness.
* @vdev: vdpa device
* @config: pointer to config buffer used to read to
+ * @set_ce_config: Set one or more device configuration in
+ * cpu endianness.
+ * @vdev: vdpa device
+ * @config: configuration to update
+ * Returns 0 on success or error code
* @get_generation: Get device config generation (optional)
* @vdev: vdpa device
* Returns u32: device generation
@@ -277,6 +290,8 @@ struct vdpa_config_ops {
const void *buf, unsigned int len);
void (*get_ce_config)(struct vdpa_device *vdev,
struct vdpa_dev_config *config);
+ int (*set_ce_config)(struct vdpa_device *vdev,
+ const struct vdpa_dev_set_config *config);
u32 (*get_generation)(struct vdpa_device *vdev);
struct vdpa_iova_range (*get_iova_range)(struct vdpa_device *vdev);
diff --git a/include/uapi/linux/vdpa.h b/include/uapi/linux/vdpa.h
index 5c31ecc3b956..ec349789b8d1 100644
--- a/include/uapi/linux/vdpa.h
+++ b/include/uapi/linux/vdpa.h
@@ -18,6 +18,7 @@ enum vdpa_command {
VDPA_CMD_DEV_DEL,
VDPA_CMD_DEV_GET, /* can dump */
VDPA_CMD_DEV_CONFIG_GET, /* can dump */
+ VDPA_CMD_DEV_CONFIG_SET,
};
enum vdpa_attr {
--
2.26.2
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