diff options
| author | Vlad Yasevich <vyasevic@redhat.com> | 2014-05-16 17:04:54 -0400 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2014-05-31 13:20:34 -0700 |
| commit | d0166f814a1daef5992c19d5c18f2860e17ad2f1 (patch) | |
| tree | a22b879759637a8841908cd8683d60a84dc8684e /include | |
| parent | 69ab2a8b80f2a479df6728effb935174dd5303bf (diff) | |
net: Allow for more then a single subclass for netif_addr_lock
[ Upstream commit 25175ba5c9bff9aaf0229df34bb5d54c81633ec3 ]
Currently netif_addr_lock_nested assumes that there can be only
a single nesting level between 2 devices. However, if we
have multiple devices of the same type stacked, this fails.
For example:
eth0 <-- vlan0.10 <-- vlan0.10.20
A more complicated configuration may stack more then one type of
device in different order.
Ex:
eth0 <-- vlan0.10 <-- macvlan0 <-- vlan1.10.20 <-- macvlan1
This patch adds an ndo_* function that allows each stackable
device to report its nesting level. If the device doesn't
provide this function default subclass of 1 is used.
Signed-off-by: Vlad Yasevich <vyasevic@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/netdevice.h | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/include/linux/netdevice.h b/include/linux/netdevice.h index 26b30df0dda2..911718fa92ed 100644 --- a/include/linux/netdevice.h +++ b/include/linux/netdevice.h @@ -1145,6 +1145,7 @@ struct net_device_ops { netdev_tx_t (*ndo_dfwd_start_xmit) (struct sk_buff *skb, struct net_device *dev, void *priv); + int (*ndo_get_lock_subclass)(struct net_device *dev); }; /* @@ -2861,7 +2862,12 @@ static inline void netif_addr_lock(struct net_device *dev) static inline void netif_addr_lock_nested(struct net_device *dev) { - spin_lock_nested(&dev->addr_list_lock, SINGLE_DEPTH_NESTING); + int subclass = SINGLE_DEPTH_NESTING; + + if (dev->netdev_ops->ndo_get_lock_subclass) + subclass = dev->netdev_ops->ndo_get_lock_subclass(dev); + + spin_lock_nested(&dev->addr_list_lock, subclass); } static inline void netif_addr_lock_bh(struct net_device *dev) |