[B.A.T.M.A.N.] [PATCH 03/20] batman-adv: compat macros/defines for local multicast group fetching

Linus Lüssing
2010-12-07T22:32:13Z

The data structures and locking mechanisms for fetching multicast mac
addresses from a net_device have changed a little between kernel
versions 2.6.21 to 2.6.35.

Therefore this commit backports two macros (netdev_mc_count(),
netdev_for_each_mc_addr()) for older kernel versions and abstracts the
way of locking and accessing the variables with own customized macros.

Signed-off-by: Linus Lüssing <linus.luessing@saxnet.de>
---
compat.h | 49 +++++++++++++++++++++++++++++++++++++++++++++++++
1 files changed, 49 insertions(+), 0 deletions(-)

diff --git a/compat.h b/compat.h
index b01455f..bbb1dad 100644
--- a/compat.h
+++ b/compat.h
@@ -264,4 +264,53 @@ int bat_seq_printf(struct seq_file *m, const char *f, ...);

#endif /* < KERNEL_VERSION(2, 6, 29) */

+#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 34)
+
+#define netdev_mc_count(dev) ((dev)->mc_count)
+#define netdev_for_each_mc_addr(mclist, dev) \
+ for (mclist = dev->mc_list; mclist; mclist = mclist->next)
+
+#endif /* < KERNEL_VERSION(2, 6, 34) */
+
+
+/*
+ * net_device - multicast list handling
+ * structures
+ */
+#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 35)
+
+#define MC_LIST struct dev_addr_list
+#define MC_LIST_ADDR da_addr
+
+#endif /* < KERNEL_VERSION(2, 6, 35) */
+
+#if LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 34)
+
+#define MC_LIST struct netdev_hw_addr_list_mc
+#define MC_LIST_ADDR addr
+
+#endif /* > KERNEL_VERSION(2, 6, 34) */
+
+/*
+ * net_device - multicast list handling
+ * locking
+ */
+#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 27)
+
+#define MC_LIST_LOCK(soft_iface, flags) \
+ spin_lock_irqsave(&soft_iface->_xmit_lock, flags)
+#define MC_LIST_UNLOCK(soft_iface, flags) \
+ spin_unlock_irqrestore(&soft_iface->_xmit_lock, flags)
+
+#endif /* LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 27) */
+
+#if LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 26)
+
+#define MC_LIST_LOCK(soft_iface, flags) \
+ spin_lock_irqsave(&soft_iface->addr_list_lock, flags)
+#define MC_LIST_UNLOCK(soft_iface, flags) \
+ spin_unlock_irqrestore(&soft_iface->addr_list_lock, flags)
+
+#endif /* > KERNEL_VERSION(2, 6, 26) */
+
#endif /* _NET_BATMAN_ADV_COMPAT_H_ */
--
1.7.1