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s390/qeth: simplify card look-up on IP notification 

On an IP event, current code tries to determine if the netdev belongs
to a L3 card by walking all qeth cards in the system, and then all of
their VLAN devices too. Short-cut the whole thing by identifying a L3
device through its netdev_ops.

Signed-off-by: Julian Wiedmann <jwi@linux.vnet.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Julian Wiedmann 2018-03-09 18:13:01 +01:00 committed by David S. Miller
parent d66b1c0df3
commit b9caa98c51
2 changed files with 12 additions and 67 deletions
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2
drivers/s390/net/qeth_core.h
View File

@ -233,8 +233,6 @@ static inline int qeth_is_ipa_enabled(struct qeth_ipa_info *ipa,
#define QETH_IDX_FUNC_LEVEL_OSD 0x0101
#define QETH_IDX_FUNC_LEVEL_IQD 0x4108
#define QETH_REAL_CARD 1
#define QETH_VLAN_CARD 2
#define QETH_BUFSIZE 4096
/**

77
drivers/s390/net/qeth_l3_main.c
View File

@ -1594,69 +1594,6 @@ static int qeth_l3_process_inbound_buffer(struct qeth_card *card,
return work_done;
}
static int qeth_l3_verify_vlan_dev(struct net_device *dev,
struct qeth_card *card)
{
int rc = 0;
u16 vid;
for_each_set_bit(vid, card->active_vlans, VLAN_N_VID) {
struct net_device *netdev;
rcu_read_lock();
netdev = __vlan_find_dev_deep_rcu(card->dev, htons(ETH_P_8021Q),
vid);
rcu_read_unlock();
if (netdev == dev) {
rc = QETH_VLAN_CARD;
break;
}
}
if (rc && !(vlan_dev_real_dev(dev)->ml_priv == (void *)card))
return 0;
return rc;
}
static int qeth_l3_verify_dev(struct net_device *dev)
{
struct qeth_card *card;
int rc = 0;
unsigned long flags;
read_lock_irqsave(&qeth_core_card_list.rwlock, flags);
list_for_each_entry(card, &qeth_core_card_list.list, list) {
if (card->dev == dev) {
rc = QETH_REAL_CARD;
break;
}
rc = qeth_l3_verify_vlan_dev(dev, card);
if (rc)
break;
}
read_unlock_irqrestore(&qeth_core_card_list.rwlock, flags);
return rc;
}
static struct qeth_card *qeth_l3_get_card_from_dev(struct net_device *dev)
{
struct qeth_card *card = NULL;
int rc;
rc = qeth_l3_verify_dev(dev);
if (rc == QETH_REAL_CARD)
card = dev->ml_priv;
else if (rc == QETH_VLAN_CARD)
card = vlan_dev_real_dev(dev)->ml_priv;
if (card && card->options.layer2)
card = NULL;
if (card)
QETH_CARD_TEXT_(card, 4, "%d", rc);
return card ;
}
static void qeth_l3_stop_card(struct qeth_card *card, int recovery_mode)
{
QETH_DBF_TEXT(SETUP, 2, "stopcard");
@ -3132,12 +3069,22 @@ static int qeth_l3_handle_ip_event(struct qeth_card *card,
}
}
static struct qeth_card *qeth_l3_get_card_from_dev(struct net_device *dev)
{
if (is_vlan_dev(dev))
dev = vlan_dev_real_dev(dev);
if (dev->netdev_ops == &qeth_l3_osa_netdev_ops ||
dev->netdev_ops == &qeth_l3_netdev_ops)
return (struct qeth_card *) dev->ml_priv;
return NULL;
}
static int qeth_l3_ip_event(struct notifier_block *this,
unsigned long event, void *ptr)
{
struct in_ifaddr *ifa = (struct in_ifaddr *)ptr;
struct net_device *dev = (struct net_device *)ifa->ifa_dev->dev;
struct net_device *dev = ifa->ifa_dev->dev;
struct qeth_ipaddr addr;
struct qeth_card *card;
@ -3165,7 +3112,7 @@ static int qeth_l3_ip6_event(struct notifier_block *this,
unsigned long event, void *ptr)
{
struct inet6_ifaddr *ifa = (struct inet6_ifaddr *)ptr;
struct net_device *dev = (struct net_device *)ifa->idev->dev;
struct net_device *dev = ifa->idev->dev;
struct qeth_ipaddr addr;
struct qeth_card *card;