linux-kernel - [PATCH 10/10] UML net: set addr_assign_type if random_ether

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Message-Id: <1329493411-25750-11-git-send-email-danny.kukawka@bisect.de>
Date:	Fri, 17 Feb 2012 16:43:31 +0100
From:	Danny Kukawka <danny.kukawka@...ect.de>
To:	Jeff Dike <jdike@...toit.com>
Cc:	Danny Kukawka <dkukawka@...e.de>,
	Richard Weinberger <richard@....at>,
	Andrew Morton <akpm@...ux-foundation.org>,
	"David S. Miller" <davem@...emloft.net>,
	Jiri Pirko <jpirko@...hat.com>,
	user-mode-linux-devel@...ts.sourceforge.net,
	linux-kernel@...r.kernel.org
Subject: [PATCH 10/10] UML net: set addr_assign_type if random_ether_addr() used

Set addr_assign_type correctly to NET_ADDR_RANDOM in case
a random MAC address was generated and assigned to the netdevice.

Return state from setup_etheraddr() about returning a random
MAC address or not and check this state in eth_configure().

Signed-off-by: Danny Kukawka <danny.kukawka@...ect.de>
---
 arch/um/drivers/net_kern.c |   11 ++++++++---
 1 files changed, 8 insertions(+), 3 deletions(-)

diff --git a/arch/um/drivers/net_kern.c b/arch/um/drivers/net_kern.c
index a492e59..d299618 100644
--- a/arch/um/drivers/net_kern.c
+++ b/arch/um/drivers/net_kern.c
@@ -293,7 +293,7 @@ static void uml_net_user_timer_expire(unsigned long _conn)
 #endif
 }
 
-static void setup_etheraddr(char *str, unsigned char *addr, char *name)
+static int setup_etheraddr(char *str, unsigned char *addr, char *name)
 {
 	char *end;
 	int i;
@@ -334,12 +334,13 @@ static void setup_etheraddr(char *str, unsigned char *addr, char *name)
 		       addr[0] | 0x02, addr[1], addr[2], addr[3], addr[4],
 		       addr[5]);
 	}
-	return;
+	return 0;
 
 random:
 	printk(KERN_INFO
 	       "Choosing a random ethernet address for device %s\n", name);
 	random_ether_addr(addr);
+	return 1;
 }
 
 static DEFINE_SPINLOCK(devices_lock);
@@ -391,6 +392,7 @@ static void eth_configure(int n, void *init, char *mac,
 	struct net_device *dev;
 	struct uml_net_private *lp;
 	int err, size;
+	int random_mac;
 
 	size = transport->private_size + sizeof(struct uml_net_private);
 
@@ -417,7 +419,7 @@ static void eth_configure(int n, void *init, char *mac,
 	 */
 	snprintf(dev->name, sizeof(dev->name), "eth%d", n);
 
-	setup_etheraddr(mac, device->mac, dev->name);
+	random_mac = setup_etheraddr(mac, device->mac, dev->name);
 
 	printk(KERN_INFO "Netdevice %d (%pM) : ", n, device->mac);
 
@@ -474,6 +476,9 @@ static void eth_configure(int n, void *init, char *mac,
 
 	/* don't use eth_mac_addr, it will not work here */
 	memcpy(dev->dev_addr, device->mac, ETH_ALEN);
+	if (random_mac)
+		dev->addr_assign_type |= NET_ADDR_RANDOM;
+
 	dev->mtu = transport->user->mtu;
 	dev->netdev_ops = &uml_netdev_ops;
 	dev->ethtool_ops = &uml_net_ethtool_ops;
-- 
1.7.8.3

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