linux/drivers/connector/Kconfig

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.

config PROC_EVENTS
	boolean "Report process events to userspace"
	depends on CONNECTOR=y
	default y
	---help---
	  Provide a connector that reports process events to userspace. Send
	  events such as fork, exec, id change (uid, gid, suid, etc), and exit.

endmenu
[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> 2005-09-12 02:15:07 +00:00			`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.`

[PATCH] Process Events Connector This patch adds a connector that reports fork, exec, id change, and exit events for all processes to userspace. It replaces the fork_advisor patch that ELSA is currently using. Applications that may find these events useful include accounting/auditing (e.g. ELSA), system activity monitoring (e.g. top), security, and resource management (e.g. CKRM). Signed-off-by: Matt Helsley <matthltc@us.ibm.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org> 2005-11-07 08:59:16 +00:00			`config PROC_EVENTS`
			`boolean "Report process events to userspace"`
			`depends on CONNECTOR=y`
			`default y`
			`---help---`
			`Provide a connector that reports process events to userspace. Send`
			`events such as fork, exec, id change (uid, gid, suid, etc), and exit.`

[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> 2005-09-12 02:15:07 +00:00			`endmenu`