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authorEvgeniy Polyakov <johnpol@2ka.mipt.ru>2005-09-11 19:15:07 -0700
committerDavid S. Miller <davem@davemloft.net>2005-09-11 19:15:07 -0700
commit7672d0b54411371e0b6a831c1cb2f0ce615de6dc (patch)
tree27d88da3263041b91d18346b3bcd27807d332f1a /drivers/connector/Kconfig
parent357d596bd552ad157a906289ab13ea6ba7e66e3d (diff)
downloadlinux-7672d0b54411371e0b6a831c1cb2f0ce615de6dc.tar.bz2
[NET]: Add netlink connector.
Kernel connector - new userspace <-> kernel space easy to use communication module which implements easy to use bidirectional message bus using netlink as it's backend. Connector was created to eliminate complex skb handling both in send and receive message bus direction. Connector driver adds possibility to connect various agents using as one of it's backends netlink based network. One must register callback and identifier. When driver receives special netlink message with appropriate identifier, appropriate callback will be called. From the userspace point of view it's quite straightforward: socket(); bind(); send(); recv(); But if kernelspace want to use full power of such connections, driver writer must create special sockets, must know about struct sk_buff handling... Connector allows any kernelspace agents to use netlink based networking for inter-process communication in a significantly easier way: int cn_add_callback(struct cb_id *id, char *name, void (*callback) (void *)); void cn_netlink_send(struct cn_msg *msg, u32 __groups, int gfp_mask); struct cb_id { __u32 idx; __u32 val; }; idx and val are unique identifiers which must be registered in connector.h for in-kernel usage. void (*callback) (void *) - is a callback function which will be called when message with above idx.val will be received by connector core. Using connector completely hides low-level transport layer from it's users. Connector uses new netlink ability to have many groups in one socket. [ Incorporating many cleanups and fixes by myself and Andrew Morton -DaveM ] Signed-off-by: Evgeniy Polyakov <johnpol@2ka.mipt.ru> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/connector/Kconfig')
-rw-r--r--drivers/connector/Kconfig13
1 files changed, 13 insertions, 0 deletions
diff --git a/drivers/connector/Kconfig b/drivers/connector/Kconfig
new file mode 100644
index 000000000000..0bc2059c1e08
--- /dev/null
+++ b/drivers/connector/Kconfig
@@ -0,0 +1,13 @@
+menu "Connector - unified userspace <-> kernelspace linker"
+
+config CONNECTOR
+ tristate "Connector - unified userspace <-> kernelspace linker"
+ depends on NET
+ ---help---
+ This is unified userspace <-> kernelspace connector working on top
+ of the netlink socket protocol.
+
+ Connector support can also be built as a module. If so, the module
+ will be called cn.ko.
+
+endmenu