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Date: Thu, 13 Dec 2018 11:54:30 +0000
From: Petr Machata <petrm@...lanox.com>
To: "netdev@...r.kernel.org" <netdev@...r.kernel.org>
CC: "j.vosburgh@...il.com" <j.vosburgh@...il.com>,
"vfalico@...il.com" <vfalico@...il.com>,
"andy@...yhouse.net" <andy@...yhouse.net>,
"davem@...emloft.net" <davem@...emloft.net>,
Jiri Pirko <jiri@...lanox.com>,
Ido Schimmel <idosch@...lanox.com>,
"roopa@...ulusnetworks.com" <roopa@...ulusnetworks.com>,
"nikolay@...ulusnetworks.com" <nikolay@...ulusnetworks.com>
Subject: [PATCH net-next 01/13] net: dev: Add extack argument to
dev_set_mac_address()
A follow-up patch will add a notifier type NETDEV_PRE_CHANGEADDR, which
allows vetoing of MAC address changes. One prominent path to that
notification is through dev_set_mac_address(). Therefore give this
function an extack argument, so that it can be packed together with the
notification. Thus a textual reason for rejection (or a warning) can be
communicated back to the user.
Signed-off-by: Petr Machata <petrm@...lanox.com>
Acked-by: Jiri Pirko <jiri@...lanox.com>
Reviewed-by: Ido Schimmel <idosch@...lanox.com>
---
drivers/net/bonding/bond_alb.c | 9 +++++----
drivers/net/bonding/bond_main.c | 15 ++++++++-------
drivers/net/hyperv/netvsc_drv.c | 4 ++--
drivers/net/macvlan.c | 4 ++--
drivers/net/tap.c | 2 +-
drivers/net/team/team.c | 2 +-
drivers/net/tun.c | 2 +-
drivers/usb/gadget/function/u_ether.c | 2 +-
include/linux/netdevice.h | 3 ++-
net/core/dev.c | 4 +++-
net/core/dev_ioctl.c | 2 +-
net/core/rtnetlink.c | 2 +-
net/ieee802154/nl-phy.c | 2 +-
13 files changed, 29 insertions(+), 24 deletions(-)
diff --git a/drivers/net/bonding/bond_alb.c b/drivers/net/bonding/bond_alb.c
index e82108c917a6..9431127bbc60 100644
--- a/drivers/net/bonding/bond_alb.c
+++ b/drivers/net/bonding/bond_alb.c
@@ -1031,7 +1031,7 @@ static int alb_set_slave_mac_addr(struct slave *slave, u8 addr[],
*/
memcpy(ss.__data, addr, len);
ss.ss_family = dev->type;
- if (dev_set_mac_address(dev, (struct sockaddr *)&ss)) {
+ if (dev_set_mac_address(dev, (struct sockaddr *)&ss, NULL)) {
netdev_err(slave->bond->dev, "dev_set_mac_address of dev %s failed! ALB mode requires that the base driver support setting the hw address also when the network device's interface is open\n",
dev->name);
return -EOPNOTSUPP;
@@ -1250,7 +1250,7 @@ static int alb_set_mac_address(struct bonding *bond, void *addr)
bond_hw_addr_copy(tmp_addr, slave->dev->dev_addr,
slave->dev->addr_len);
- res = dev_set_mac_address(slave->dev, addr);
+ res = dev_set_mac_address(slave->dev, addr, NULL);
/* restore net_device's hw address */
bond_hw_addr_copy(slave->dev->dev_addr, tmp_addr,
@@ -1273,7 +1273,7 @@ static int alb_set_mac_address(struct bonding *bond, void *addr)
bond_hw_addr_copy(tmp_addr, rollback_slave->dev->dev_addr,
rollback_slave->dev->addr_len);
dev_set_mac_address(rollback_slave->dev,
- (struct sockaddr *)&ss);
+ (struct sockaddr *)&ss, NULL);
bond_hw_addr_copy(rollback_slave->dev->dev_addr, tmp_addr,
rollback_slave->dev->addr_len);
}
@@ -1732,7 +1732,8 @@ void bond_alb_handle_active_change(struct bonding *bond, struct slave *new_slave
bond->dev->addr_len);
ss.ss_family = bond->dev->type;
/* we don't care if it can't change its mac, best effort */
- dev_set_mac_address(new_slave->dev, (struct sockaddr *)&ss);
+ dev_set_mac_address(new_slave->dev, (struct sockaddr *)&ss,
+ NULL);
bond_hw_addr_copy(new_slave->dev->dev_addr, tmp_addr,
new_slave->dev->addr_len);
diff --git a/drivers/net/bonding/bond_main.c b/drivers/net/bonding/bond_main.c
index 6b34dbefa7dd..06039be63034 100644
--- a/drivers/net/bonding/bond_main.c
+++ b/drivers/net/bonding/bond_main.c
@@ -680,7 +680,7 @@ static void bond_do_fail_over_mac(struct bonding *bond,
}
rv = dev_set_mac_address(new_active->dev,
- (struct sockaddr *)&ss);
+ (struct sockaddr *)&ss, NULL);
if (rv) {
netdev_err(bond->dev, "Error %d setting MAC of slave %s\n",
-rv, new_active->dev->name);
@@ -695,7 +695,7 @@ static void bond_do_fail_over_mac(struct bonding *bond,
ss.ss_family = old_active->dev->type;
rv = dev_set_mac_address(old_active->dev,
- (struct sockaddr *)&ss);
+ (struct sockaddr *)&ss, NULL);
if (rv)
netdev_err(bond->dev, "Error %d setting MAC of slave %s\n",
-rv, new_active->dev->name);
@@ -1527,7 +1527,8 @@ int bond_enslave(struct net_device *bond_dev, struct net_device *slave_dev,
*/
memcpy(ss.__data, bond_dev->dev_addr, bond_dev->addr_len);
ss.ss_family = slave_dev->type;
- res = dev_set_mac_address(slave_dev, (struct sockaddr *)&ss);
+ res = dev_set_mac_address(slave_dev, (struct sockaddr *)&ss,
+ extack);
if (res) {
netdev_dbg(bond_dev, "Error %d calling set_mac_address\n", res);
goto err_restore_mtu;
@@ -1818,7 +1819,7 @@ int bond_enslave(struct net_device *bond_dev, struct net_device *slave_dev,
bond_hw_addr_copy(ss.__data, new_slave->perm_hwaddr,
new_slave->dev->addr_len);
ss.ss_family = slave_dev->type;
- dev_set_mac_address(slave_dev, (struct sockaddr *)&ss);
+ dev_set_mac_address(slave_dev, (struct sockaddr *)&ss, NULL);
}
err_restore_mtu:
@@ -1999,7 +2000,7 @@ static int __bond_release_one(struct net_device *bond_dev,
bond_hw_addr_copy(ss.__data, slave->perm_hwaddr,
slave->dev->addr_len);
ss.ss_family = slave_dev->type;
- dev_set_mac_address(slave_dev, (struct sockaddr *)&ss);
+ dev_set_mac_address(slave_dev, (struct sockaddr *)&ss, NULL);
}
if (unregister)
@@ -3732,7 +3733,7 @@ static int bond_set_mac_address(struct net_device *bond_dev, void *addr)
bond_for_each_slave(bond, slave, iter) {
netdev_dbg(bond_dev, "slave %p %s\n", slave, slave->dev->name);
- res = dev_set_mac_address(slave->dev, addr);
+ res = dev_set_mac_address(slave->dev, addr, NULL);
if (res) {
/* TODO: consider downing the slave
* and retry ?
@@ -3761,7 +3762,7 @@ static int bond_set_mac_address(struct net_device *bond_dev, void *addr)
break;
tmp_res = dev_set_mac_address(rollback_slave->dev,
- (struct sockaddr *)&tmp_ss);
+ (struct sockaddr *)&tmp_ss, NULL);
if (tmp_res) {
netdev_dbg(bond_dev, "unwind err %d dev %s\n",
tmp_res, rollback_slave->dev->name);
diff --git a/drivers/net/hyperv/netvsc_drv.c b/drivers/net/hyperv/netvsc_drv.c
index 18b5584d6377..91ed15ea5883 100644
--- a/drivers/net/hyperv/netvsc_drv.c
+++ b/drivers/net/hyperv/netvsc_drv.c
@@ -1247,7 +1247,7 @@ static int netvsc_set_mac_addr(struct net_device *ndev, void *p)
return -ENODEV;
if (vf_netdev) {
- err = dev_set_mac_address(vf_netdev, addr);
+ err = dev_set_mac_address(vf_netdev, addr, NULL);
if (err)
return err;
}
@@ -1258,7 +1258,7 @@ static int netvsc_set_mac_addr(struct net_device *ndev, void *p)
} else if (vf_netdev) {
/* rollback change on VF */
memcpy(addr->sa_data, ndev->dev_addr, ETH_ALEN);
- dev_set_mac_address(vf_netdev, addr);
+ dev_set_mac_address(vf_netdev, addr, NULL);
}
return err;
diff --git a/drivers/net/macvlan.c b/drivers/net/macvlan.c
index 0da3d36b283b..fc726ce4c164 100644
--- a/drivers/net/macvlan.c
+++ b/drivers/net/macvlan.c
@@ -744,7 +744,7 @@ static int macvlan_set_mac_address(struct net_device *dev, void *p)
if (vlan->mode == MACVLAN_MODE_PASSTHRU) {
macvlan_set_addr_change(vlan->port);
- return dev_set_mac_address(vlan->lowerdev, addr);
+ return dev_set_mac_address(vlan->lowerdev, addr, NULL);
}
if (macvlan_addr_busy(vlan->port, addr->sa_data))
@@ -1213,7 +1213,7 @@ static void macvlan_port_destroy(struct net_device *dev)
sa.sa_family = port->dev->type;
memcpy(&sa.sa_data, port->perm_addr, port->dev->addr_len);
- dev_set_mac_address(port->dev, &sa);
+ dev_set_mac_address(port->dev, &sa, NULL);
}
kfree(port);
diff --git a/drivers/net/tap.c b/drivers/net/tap.c
index f03004f37eca..443b2694130c 100644
--- a/drivers/net/tap.c
+++ b/drivers/net/tap.c
@@ -1113,7 +1113,7 @@ static long tap_ioctl(struct file *file, unsigned int cmd,
rtnl_unlock();
return -ENOLINK;
}
- ret = dev_set_mac_address(tap->dev, &sa);
+ ret = dev_set_mac_address(tap->dev, &sa, NULL);
tap_put_tap_dev(tap);
rtnl_unlock();
return ret;
diff --git a/drivers/net/team/team.c b/drivers/net/team/team.c
index 93576e0240dd..afd9d25d1992 100644
--- a/drivers/net/team/team.c
+++ b/drivers/net/team/team.c
@@ -59,7 +59,7 @@ static int __set_port_dev_addr(struct net_device *port_dev,
memcpy(addr.__data, dev_addr, port_dev->addr_len);
addr.ss_family = port_dev->type;
- return dev_set_mac_address(port_dev, (struct sockaddr *)&addr);
+ return dev_set_mac_address(port_dev, (struct sockaddr *)&addr, NULL);
}
static int team_port_set_orig_dev_addr(struct team_port *port)
diff --git a/drivers/net/tun.c b/drivers/net/tun.c
index ea528248d7d0..72577aa35b06 100644
--- a/drivers/net/tun.c
+++ b/drivers/net/tun.c
@@ -3202,7 +3202,7 @@ static long __tun_chr_ioctl(struct file *file, unsigned int cmd,
tun_debug(KERN_DEBUG, tun, "set hw address: %pM\n",
ifr.ifr_hwaddr.sa_data);
- ret = dev_set_mac_address(tun->dev, &ifr.ifr_hwaddr);
+ ret = dev_set_mac_address(tun->dev, &ifr.ifr_hwaddr, NULL);
break;
case TUNGETSNDBUF:
diff --git a/drivers/usb/gadget/function/u_ether.c b/drivers/usb/gadget/function/u_ether.c
index 0f026d445e31..737bd77a575d 100644
--- a/drivers/usb/gadget/function/u_ether.c
+++ b/drivers/usb/gadget/function/u_ether.c
@@ -879,7 +879,7 @@ int gether_register_netdev(struct net_device *net)
sa.sa_family = net->type;
memcpy(sa.sa_data, dev->dev_mac, ETH_ALEN);
rtnl_lock();
- status = dev_set_mac_address(net, &sa);
+ status = dev_set_mac_address(net, &sa, NULL);
rtnl_unlock();
if (status)
pr_warn("cannot set self ethernet address: %d\n", status);
diff --git a/include/linux/netdevice.h b/include/linux/netdevice.h
index 36ca5f50f822..d89875ec21ac 100644
--- a/include/linux/netdevice.h
+++ b/include/linux/netdevice.h
@@ -3628,7 +3628,8 @@ int dev_set_mtu_ext(struct net_device *dev, int mtu,
int dev_set_mtu(struct net_device *, int);
int dev_change_tx_queue_len(struct net_device *, unsigned long);
void dev_set_group(struct net_device *, int);
-int dev_set_mac_address(struct net_device *, struct sockaddr *);
+int dev_set_mac_address(struct net_device *dev, struct sockaddr *sa,
+ struct netlink_ext_ack *extack);
int dev_change_carrier(struct net_device *, bool new_carrier);
int dev_get_phys_port_id(struct net_device *dev,
struct netdev_phys_item_id *ppid);
diff --git a/net/core/dev.c b/net/core/dev.c
index 754284873355..7250a3a73fa4 100644
--- a/net/core/dev.c
+++ b/net/core/dev.c
@@ -7759,10 +7759,12 @@ EXPORT_SYMBOL(dev_set_group);
* dev_set_mac_address - Change Media Access Control Address
* @dev: device
* @sa: new address
+ * @extack: netlink extended ack
*
* Change the hardware (MAC) address of the device
*/
-int dev_set_mac_address(struct net_device *dev, struct sockaddr *sa)
+int dev_set_mac_address(struct net_device *dev, struct sockaddr *sa,
+ struct netlink_ext_ack *extack)
{
const struct net_device_ops *ops = dev->netdev_ops;
int err;
diff --git a/net/core/dev_ioctl.c b/net/core/dev_ioctl.c
index da273ec3cc57..31380fd5a4e2 100644
--- a/net/core/dev_ioctl.c
+++ b/net/core/dev_ioctl.c
@@ -246,7 +246,7 @@ static int dev_ifsioc(struct net *net, struct ifreq *ifr, unsigned int cmd)
case SIOCSIFHWADDR:
if (dev->addr_len > sizeof(struct sockaddr))
return -EINVAL;
- return dev_set_mac_address(dev, &ifr->ifr_hwaddr);
+ return dev_set_mac_address(dev, &ifr->ifr_hwaddr, NULL);
case SIOCSIFHWBROADCAST:
if (ifr->ifr_hwaddr.sa_family != dev->type)
diff --git a/net/core/rtnetlink.c b/net/core/rtnetlink.c
index 3b6e551f9e69..f8bdb8adab2c 100644
--- a/net/core/rtnetlink.c
+++ b/net/core/rtnetlink.c
@@ -2444,7 +2444,7 @@ static int do_setlink(const struct sk_buff *skb,
sa->sa_family = dev->type;
memcpy(sa->sa_data, nla_data(tb[IFLA_ADDRESS]),
dev->addr_len);
- err = dev_set_mac_address(dev, sa);
+ err = dev_set_mac_address(dev, sa, extack);
kfree(sa);
if (err)
goto errout;
diff --git a/net/ieee802154/nl-phy.c b/net/ieee802154/nl-phy.c
index b231e40f006a..0c25c0bcc4da 100644
--- a/net/ieee802154/nl-phy.c
+++ b/net/ieee802154/nl-phy.c
@@ -242,7 +242,7 @@ int ieee802154_add_iface(struct sk_buff *skb, struct genl_info *info)
* dev_set_mac_address require RTNL_LOCK
*/
rtnl_lock();
- rc = dev_set_mac_address(dev, &addr);
+ rc = dev_set_mac_address(dev, &addr, NULL);
rtnl_unlock();
if (rc)
goto dev_unregister;
--
2.4.11
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