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authorNeil Horman <nhorman@tuxdriver.com>2011-07-26 06:05:38 +0000
committerGreg Kroah-Hartman <gregkh@suse.de>2011-08-15 18:31:38 -0700
commit9cf81e790a0d8709cbadbaff73ee40aa944e2ea1 (patch)
tree461eef924ffafe4de495a6fb0379d1c0efd88e85
parent60f17a7798369bec34f171ca126f8247c773763b (diff)
downloadlinux-linaro-9cf81e790a0d8709cbadbaff73ee40aa944e2ea1.tar.gz
net: Audit drivers to identify those needing IFF_TX_SKB_SHARING cleared
[ Upstream commit 550fd08c2cebad61c548def135f67aba284c6162 ] After the last patch, We are left in a state in which only drivers calling ether_setup have IFF_TX_SKB_SHARING set (we assume that drivers touching real hardware call ether_setup for their net_devices and don't hold any state in their skbs. There are a handful of drivers that violate this assumption of course, and need to be fixed up. This patch identifies those drivers, and marks them as not being able to support the safe transmission of skbs by clearning the IFF_TX_SKB_SHARING flag in priv_flags Signed-off-by: Neil Horman <nhorman@tuxdriver.com> CC: Karsten Keil <isdn@linux-pingi.de> CC: "David S. Miller" <davem@davemloft.net> CC: Jay Vosburgh <fubar@us.ibm.com> CC: Andy Gospodarek <andy@greyhouse.net> CC: Patrick McHardy <kaber@trash.net> CC: Krzysztof Halasa <khc@pm.waw.pl> CC: "John W. Linville" <linville@tuxdriver.com> CC: Greg Kroah-Hartman <gregkh@suse.de> CC: Marcel Holtmann <marcel@holtmann.org> CC: Johannes Berg <johannes@sipsolutions.net> Signed-off-by: David S. Miller <davem@davemloft.net> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
-rw-r--r--drivers/isdn/i4l/isdn_net.c3
-rw-r--r--drivers/net/bonding/bond_main.c6
-rw-r--r--drivers/net/ifb.c2
-rw-r--r--drivers/net/macvlan.c2
-rw-r--r--drivers/net/tun.c1
-rw-r--r--drivers/net/veth.c2
-rw-r--r--drivers/net/wan/hdlc_fr.c5
-rw-r--r--drivers/net/wireless/airo.c1
-rw-r--r--drivers/net/wireless/hostap/hostap_main.c1
-rw-r--r--drivers/staging/ath6kl/os/linux/ar6000_drv.c1
-rw-r--r--net/8021q/vlan_dev.c2
-rw-r--r--net/bluetooth/bnep/netdev.c1
-rw-r--r--net/l2tp/l2tp_eth.c2
-rw-r--r--net/mac80211/iface.c1
14 files changed, 22 insertions, 8 deletions
diff --git a/drivers/isdn/i4l/isdn_net.c b/drivers/isdn/i4l/isdn_net.c
index 97988111e45..b145b5acee9 100644
--- a/drivers/isdn/i4l/isdn_net.c
+++ b/drivers/isdn/i4l/isdn_net.c
@@ -2531,6 +2531,9 @@ static void _isdn_setup(struct net_device *dev)
/* Setup the generic properties */
dev->flags = IFF_NOARP|IFF_POINTOPOINT;
+
+ /* isdn prepends a header in the tx path, can't share skbs */
+ dev->priv_flags &= ~IFF_TX_SKB_SHARING;
dev->header_ops = NULL;
dev->netdev_ops = &isdn_netdev_ops;
diff --git a/drivers/net/bonding/bond_main.c b/drivers/net/bonding/bond_main.c
index 63c22b0bb5a..9ea2f21443e 100644
--- a/drivers/net/bonding/bond_main.c
+++ b/drivers/net/bonding/bond_main.c
@@ -1625,8 +1625,10 @@ int bond_enslave(struct net_device *bond_dev, struct net_device *slave_dev)
if (slave_dev->type != ARPHRD_ETHER)
bond_setup_by_slave(bond_dev, slave_dev);
- else
+ else {
ether_setup(bond_dev);
+ bond_dev->priv_flags &= ~IFF_TX_SKB_SHARING;
+ }
netdev_bonding_change(bond_dev,
NETDEV_POST_TYPE_CHANGE);
@@ -4398,7 +4400,7 @@ static void bond_setup(struct net_device *bond_dev)
bond_dev->tx_queue_len = 0;
bond_dev->flags |= IFF_MASTER|IFF_MULTICAST;
bond_dev->priv_flags |= IFF_BONDING;
- bond_dev->priv_flags &= ~IFF_XMIT_DST_RELEASE;
+ bond_dev->priv_flags &= ~(IFF_XMIT_DST_RELEASE | IFF_TX_SKB_SHARING);
/* At first, we block adding VLANs. That's the only way to
* prevent problems that occur when adding VLANs over an
diff --git a/drivers/net/ifb.c b/drivers/net/ifb.c
index 4fecaed67fc..2b98461cb72 100644
--- a/drivers/net/ifb.c
+++ b/drivers/net/ifb.c
@@ -145,7 +145,7 @@ static void ifb_setup(struct net_device *dev)
dev->flags |= IFF_NOARP;
dev->flags &= ~IFF_MULTICAST;
- dev->priv_flags &= ~IFF_XMIT_DST_RELEASE;
+ dev->priv_flags &= ~(IFF_XMIT_DST_RELEASE | IFF_TX_SKB_SHARING);
random_ether_addr(dev->dev_addr);
}
diff --git a/drivers/net/macvlan.c b/drivers/net/macvlan.c
index d6aeaa5f25e..2f3c48da586 100644
--- a/drivers/net/macvlan.c
+++ b/drivers/net/macvlan.c
@@ -547,7 +547,7 @@ void macvlan_common_setup(struct net_device *dev)
{
ether_setup(dev);
- dev->priv_flags &= ~IFF_XMIT_DST_RELEASE;
+ dev->priv_flags &= ~(IFF_XMIT_DST_RELEASE | IFF_TX_SKB_SHARING);
dev->netdev_ops = &macvlan_netdev_ops;
dev->destructor = free_netdev;
dev->header_ops = &macvlan_hard_header_ops,
diff --git a/drivers/net/tun.c b/drivers/net/tun.c
index 5235f48be1b..fb50e5a542f 100644
--- a/drivers/net/tun.c
+++ b/drivers/net/tun.c
@@ -528,6 +528,7 @@ static void tun_net_init(struct net_device *dev)
dev->netdev_ops = &tap_netdev_ops;
/* Ethernet TAP Device */
ether_setup(dev);
+ dev->priv_flags &= ~IFF_TX_SKB_SHARING;
random_ether_addr(dev->dev_addr);
diff --git a/drivers/net/veth.c b/drivers/net/veth.c
index 8461576fa01..4bf7c6d4ab9 100644
--- a/drivers/net/veth.c
+++ b/drivers/net/veth.c
@@ -262,6 +262,8 @@ static void veth_setup(struct net_device *dev)
{
ether_setup(dev);
+ dev->priv_flags &= ~IFF_TX_SKB_SHARING;
+
dev->netdev_ops = &veth_netdev_ops;
dev->ethtool_ops = &veth_ethtool_ops;
dev->features |= NETIF_F_LLTX;
diff --git a/drivers/net/wan/hdlc_fr.c b/drivers/net/wan/hdlc_fr.c
index fc433f28c04..13f9997ede4 100644
--- a/drivers/net/wan/hdlc_fr.c
+++ b/drivers/net/wan/hdlc_fr.c
@@ -1083,9 +1083,10 @@ static int fr_add_pvc(struct net_device *frad, unsigned int dlci, int type)
used = pvc_is_used(pvc);
- if (type == ARPHRD_ETHER)
+ if (type == ARPHRD_ETHER) {
dev = alloc_netdev(0, "pvceth%d", ether_setup);
- else
+ dev->priv_flags &= ~IFF_TX_SKB_SHARING;
+ } else
dev = alloc_netdev(0, "pvc%d", pvc_setup);
if (!dev) {
diff --git a/drivers/net/wireless/airo.c b/drivers/net/wireless/airo.c
index 55cf71fbffe..e1b3e3c134f 100644
--- a/drivers/net/wireless/airo.c
+++ b/drivers/net/wireless/airo.c
@@ -2823,6 +2823,7 @@ static struct net_device *_init_airo_card( unsigned short irq, int port,
dev->wireless_data = &ai->wireless_data;
dev->irq = irq;
dev->base_addr = port;
+ dev->priv_flags &= ~IFF_TX_SKB_SHARING;
SET_NETDEV_DEV(dev, dmdev);
diff --git a/drivers/net/wireless/hostap/hostap_main.c b/drivers/net/wireless/hostap/hostap_main.c
index d5084829c9e..89a116fba1d 100644
--- a/drivers/net/wireless/hostap/hostap_main.c
+++ b/drivers/net/wireless/hostap/hostap_main.c
@@ -855,6 +855,7 @@ void hostap_setup_dev(struct net_device *dev, local_info_t *local,
iface = netdev_priv(dev);
ether_setup(dev);
+ dev->priv_flags &= ~IFF_TX_SKB_SHARING;
/* kernel callbacks */
if (iface) {
diff --git a/drivers/staging/ath6kl/os/linux/ar6000_drv.c b/drivers/staging/ath6kl/os/linux/ar6000_drv.c
index aa97efc0e4e..62487a76900 100644
--- a/drivers/staging/ath6kl/os/linux/ar6000_drv.c
+++ b/drivers/staging/ath6kl/os/linux/ar6000_drv.c
@@ -6198,6 +6198,7 @@ int ar6000_create_ap_interface(struct ar6_softc *ar, char *ap_ifname)
ether_setup(dev);
init_netdev(dev, ap_ifname);
+ dev->priv_flags &= ~IFF_TX_SKB_SHARING;
if (register_netdev(dev)) {
AR_DEBUG_PRINTF(ATH_DEBUG_ERR,("ar6000_create_ap_interface: register_netdev failed\n"));
diff --git a/net/8021q/vlan_dev.c b/net/8021q/vlan_dev.c
index 6e82148edfc..5b4f51d440f 100644
--- a/net/8021q/vlan_dev.c
+++ b/net/8021q/vlan_dev.c
@@ -694,7 +694,7 @@ void vlan_setup(struct net_device *dev)
ether_setup(dev);
dev->priv_flags |= IFF_802_1Q_VLAN;
- dev->priv_flags &= ~IFF_XMIT_DST_RELEASE;
+ dev->priv_flags &= ~(IFF_XMIT_DST_RELEASE | IFF_TX_SKB_SHARING);
dev->tx_queue_len = 0;
dev->netdev_ops = &vlan_netdev_ops;
diff --git a/net/bluetooth/bnep/netdev.c b/net/bluetooth/bnep/netdev.c
index 8c100c9dae2..d4f5dff7c95 100644
--- a/net/bluetooth/bnep/netdev.c
+++ b/net/bluetooth/bnep/netdev.c
@@ -231,6 +231,7 @@ void bnep_net_setup(struct net_device *dev)
dev->addr_len = ETH_ALEN;
ether_setup(dev);
+ dev->priv_flags &= ~IFF_TX_SKB_SHARING;
dev->netdev_ops = &bnep_netdev_ops;
dev->watchdog_timeo = HZ * 2;
diff --git a/net/l2tp/l2tp_eth.c b/net/l2tp/l2tp_eth.c
index a8193f52c13..d2726a74597 100644
--- a/net/l2tp/l2tp_eth.c
+++ b/net/l2tp/l2tp_eth.c
@@ -103,7 +103,7 @@ static struct net_device_ops l2tp_eth_netdev_ops = {
static void l2tp_eth_dev_setup(struct net_device *dev)
{
ether_setup(dev);
-
+ dev->priv_flags &= ~IFF_TX_SKB_SHARING;
dev->netdev_ops = &l2tp_eth_netdev_ops;
dev->destructor = free_netdev;
}
diff --git a/net/mac80211/iface.c b/net/mac80211/iface.c
index dee30aea9ab..895eec19f2e 100644
--- a/net/mac80211/iface.c
+++ b/net/mac80211/iface.c
@@ -699,6 +699,7 @@ static const struct net_device_ops ieee80211_monitorif_ops = {
static void ieee80211_if_setup(struct net_device *dev)
{
ether_setup(dev);
+ dev->priv_flags &= ~IFF_TX_SKB_SHARING;
dev->netdev_ops = &ieee80211_dataif_ops;
dev->destructor = free_netdev;
}