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authorNeil Horman <nhorman@tuxdriver.com>2012-05-29 09:30:41 +0000
committerDavid S. Miller <davem@davemloft.net>2012-05-29 22:33:56 -0400
commite9412c37082b5c932e83364aaed0c38c2ce33acb (patch)
tree479e716c478173830e378f432d3d0b24c6979541 /include
parent2033e9bf06f07e049bbc77e9452856df846714cc (diff)
genetlink: Build a generic netlink family module alias
Generic netlink searches for -type- formatted aliases when requesting a module to fulfill a protocol request (i.e. net-pf-16-proto-16-type-<x>, where x is a type value). However generic netlink protocols have no well defined type numbers, they have string names. Modify genl_ctrl_getfamily to request an alias in the format net-pf-16-proto-16-family-<x> instead, where x is a generic string, and add a macro that builds on the previously added MODULE_ALIAS_NET_PF_PROTO_NAME macro to allow modules to specifify those generic strings. Note, l2tp previously hacked together an net-pf-16-proto-16-type-l2tp alias using the MODULE_ALIAS macro, with these updates we can convert that to use the PROTO_NAME macro. Signed-off-by: Neil Horman <nhorman@tuxdriver.com> CC: Eric Dumazet <eric.dumazet@gmail.com> CC: James Chapman <jchapman@katalix.com> CC: David Miller <davem@davemloft.net> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include')
-rw-r--r--include/linux/genetlink.h3
1 files changed, 3 insertions, 0 deletions
diff --git a/include/linux/genetlink.h b/include/linux/genetlink.h
index 73c28dea10ae..7a114016ac7d 100644
--- a/include/linux/genetlink.h
+++ b/include/linux/genetlink.h
@@ -110,6 +110,9 @@ extern int lockdep_genl_is_held(void);
#define genl_dereference(p) \
rcu_dereference_protected(p, lockdep_genl_is_held())
+#define MODULE_ALIAS_GENL_FAMILY(family)\
+ MODULE_ALIAS_NET_PF_PROTO_NAME(PF_NETLINK, NETLINK_GENERIC, "-family-" family)
+
#endif /* __KERNEL__ */
#endif /* __LINUX_GENERIC_NETLINK_H */