[RTNETLINK]: rtnl_link: allow specifying initial device address
Drivers need to validate the initial addresses in their netlink attribute
validation function or manually reject them if they can't support this.
Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/drivers/net/dummy.c b/drivers/net/dummy.c
index 373ff70..756a6bc 100644
--- a/drivers/net/dummy.c
+++ b/drivers/net/dummy.c
@@ -84,9 +84,21 @@
return 0;
}
+static int dummy_validate(struct nlattr *tb[], struct nlattr *data[])
+{
+ if (tb[IFLA_ADDRESS]) {
+ if (nla_len(tb[IFLA_ADDRESS]) != ETH_ALEN)
+ return -EINVAL;
+ if (!is_valid_ether_addr(nla_data(tb[IFLA_ADDRESS])))
+ return -EADDRNOTAVAIL;
+ }
+ return 0;
+}
+
static struct rtnl_link_ops dummy_link_ops __read_mostly = {
.kind = "dummy",
.setup = dummy_setup,
+ .validate = dummy_validate,
};
/* Number of dummy devices to be set up by this module. */
diff --git a/drivers/net/ifb.c b/drivers/net/ifb.c
index c8e7c8f..f5c3598 100644
--- a/drivers/net/ifb.c
+++ b/drivers/net/ifb.c
@@ -221,10 +221,22 @@
return 0;
}
+static int ifb_validate(struct nlattr *tb[], struct nlattr *data[])
+{
+ if (tb[IFLA_ADDRESS]) {
+ if (nla_len(tb[IFLA_ADDRESS]) != ETH_ALEN)
+ return -EINVAL;
+ if (!is_valid_ether_addr(nla_data(tb[IFLA_ADDRESS])))
+ return -EADDRNOTAVAIL;
+ }
+ return 0;
+}
+
static struct rtnl_link_ops ifb_link_ops __read_mostly = {
.kind = "ifb",
.priv_size = sizeof(struct ifb_private),
.setup = ifb_setup,
+ .validate = ifb_validate,
};
/* Number of ifb devices to be set up by this module. */
diff --git a/net/8021q/vlan.c b/net/8021q/vlan.c
index 34c1d0b..abb9900 100644
--- a/net/8021q/vlan.c
+++ b/net/8021q/vlan.c
@@ -324,8 +324,10 @@
(1<<__LINK_STATE_DORMANT))) |
(1<<__LINK_STATE_PRESENT);
- memcpy(dev->broadcast, real_dev->broadcast, real_dev->addr_len);
- memcpy(dev->dev_addr, real_dev->dev_addr, real_dev->addr_len);
+ if (is_zero_ether_addr(dev->dev_addr))
+ memcpy(dev->dev_addr, real_dev->dev_addr, dev->addr_len);
+ if (is_zero_ether_addr(dev->broadcast))
+ memcpy(dev->broadcast, real_dev->broadcast, dev->addr_len);
if (real_dev->features & NETIF_F_HW_VLAN_TX) {
dev->hard_header = real_dev->hard_header;
@@ -373,6 +375,8 @@
new_dev->set_multicast_list = vlan_dev_set_multicast_list;
new_dev->destructor = free_netdev;
new_dev->do_ioctl = vlan_dev_ioctl;
+
+ memset(new_dev->broadcast, 0, sizeof(ETH_ALEN));
}
static void vlan_transfer_operstate(const struct net_device *dev, struct net_device *vlandev)
diff --git a/net/8021q/vlan_netlink.c b/net/8021q/vlan_netlink.c
index 844c7e4..6cdd1e0 100644
--- a/net/8021q/vlan_netlink.c
+++ b/net/8021q/vlan_netlink.c
@@ -41,6 +41,13 @@
u16 id;
int err;
+ if (tb[IFLA_ADDRESS]) {
+ if (nla_len(tb[IFLA_ADDRESS]) != ETH_ALEN)
+ return -EINVAL;
+ if (!is_valid_ether_addr(nla_data(tb[IFLA_ADDRESS])))
+ return -EADDRNOTAVAIL;
+ }
+
if (!data)
return -EINVAL;
diff --git a/net/core/rtnetlink.c b/net/core/rtnetlink.c
index 7b6b163..864cbdf 100644
--- a/net/core/rtnetlink.c
+++ b/net/core/rtnetlink.c
@@ -1032,8 +1032,7 @@
if (ifm->ifi_index || ifm->ifi_flags || ifm->ifi_change)
return -EOPNOTSUPP;
- if (tb[IFLA_ADDRESS] || tb[IFLA_BROADCAST] || tb[IFLA_MAP] ||
- tb[IFLA_MASTER] || tb[IFLA_PROTINFO])
+ if (tb[IFLA_MAP] || tb[IFLA_MASTER] || tb[IFLA_PROTINFO])
return -EOPNOTSUPP;
if (!ops) {
@@ -1065,6 +1064,12 @@
if (tb[IFLA_MTU])
dev->mtu = nla_get_u32(tb[IFLA_MTU]);
+ if (tb[IFLA_ADDRESS])
+ memcpy(dev->dev_addr, nla_data(tb[IFLA_ADDRESS]),
+ nla_len(tb[IFLA_ADDRESS]));
+ if (tb[IFLA_BROADCAST])
+ memcpy(dev->broadcast, nla_data(tb[IFLA_BROADCAST]),
+ nla_len(tb[IFLA_BROADCAST]));
if (tb[IFLA_TXQLEN])
dev->tx_queue_len = nla_get_u32(tb[IFLA_TXQLEN]);
if (tb[IFLA_WEIGHT])