[Bridge] [patch net-next v2 10/15] qeth: ensure that __vlan_find_dev_deep() is called with rcu_read_lock
From: Jiri Pirko <jiri@resnulli.us>
Date: 2012-08-14 15:09:30
Also in:
linux-rdma, linux-s390, lkml, netdev
Subsystem:
networking drivers, s390 architecture, s390 network drivers, the rest · Maintainers:
Andrew Lunn, "David S. Miller", Eric Dumazet, Jakub Kicinski, Paolo Abeni, Heiko Carstens, Vasily Gorbik, Alexander Gordeev, Alexandra Winter, Aswin Karuvally, Linus Torvalds
Also benefit from rcu_read_lock held and use __in_dev_get_rcu() in ipv4 case. Signed-off-by: Jiri Pirko <jiri@resnulli.us> --- drivers/s390/net/qeth_l3_main.c | 21 +++++++++++---------- 1 file changed, 11 insertions(+), 10 deletions(-)
diff --git a/drivers/s390/net/qeth_l3_main.c b/drivers/s390/net/qeth_l3_main.c
index c5f03fa..6b3988b 100644
--- a/drivers/s390/net/qeth_l3_main.c
+++ b/drivers/s390/net/qeth_l3_main.c@@ -1638,6 +1638,7 @@ static void qeth_l3_add_mc(struct qeth_card *card, struct in_device *in4_dev) } } +/* called with rcu_read_lock */ static void qeth_l3_add_vlan_mc(struct qeth_card *card) { struct in_device *in_dev;
@@ -1650,19 +1651,14 @@ static void qeth_l3_add_vlan_mc(struct qeth_card *card) for_each_set_bit(vid, card->active_vlans, VLAN_N_VID) { struct net_device *netdev; - rcu_read_lock(); netdev = __vlan_find_dev_deep(card->dev, vid); - rcu_read_unlock(); if (netdev == NULL || !(netdev->flags & IFF_UP)) continue; - in_dev = in_dev_get(netdev); + in_dev = __in_dev_get_rcu(netdev); if (!in_dev) continue; - rcu_read_lock(); qeth_l3_add_mc(card, in_dev); - rcu_read_unlock(); - in_dev_put(in_dev); } }
@@ -1671,14 +1667,14 @@ static void qeth_l3_add_multicast_ipv4(struct qeth_card *card) struct in_device *in4_dev; QETH_CARD_TEXT(card, 4, "chkmcv4"); - in4_dev = in_dev_get(card->dev); - if (in4_dev == NULL) - return; rcu_read_lock(); + in4_dev = __in_dev_get_rcu(card->dev); + if (in4_dev == NULL) + goto unlock; qeth_l3_add_mc(card, in4_dev); qeth_l3_add_vlan_mc(card); +unlock: rcu_read_unlock(); - in_dev_put(in4_dev); } #ifdef CONFIG_QETH_IPV6
@@ -1703,6 +1699,7 @@ static void qeth_l3_add_mc6(struct qeth_card *card, struct inet6_dev *in6_dev) } } +/* called with rcu_read_lock */ static void qeth_l3_add_vlan_mc6(struct qeth_card *card) { struct inet6_dev *in_dev;
@@ -1739,10 +1736,12 @@ static void qeth_l3_add_multicast_ipv6(struct qeth_card *card) in6_dev = in6_dev_get(card->dev); if (in6_dev == NULL) return; + rcu_read_lock(); read_lock_bh(&in6_dev->lock); qeth_l3_add_mc6(card, in6_dev); qeth_l3_add_vlan_mc6(card); read_unlock_bh(&in6_dev->lock); + rcu_read_unlock(); in6_dev_put(in6_dev); } #endif /* CONFIG_QETH_IPV6 */
@@ -1811,8 +1810,10 @@ static void qeth_l3_free_vlan_addresses6(struct qeth_card *card, static void qeth_l3_free_vlan_addresses(struct qeth_card *card, unsigned short vid) { + rcu_read_lock(); qeth_l3_free_vlan_addresses4(card, vid); qeth_l3_free_vlan_addresses6(card, vid); + rcu_read_unlock(); } static int qeth_l3_vlan_rx_add_vid(struct net_device *dev, unsigned short vid)
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1.7.10.4