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* Staging: dst: core files.Evgeniy Polyakov2009-04-031-1/+3
| | | | | | | | | | | | | | | | | | | | | | | | This patch contains DST core files, which introduce block layer, connector and sysfs registration glue and main headers. Connector is used for the configuration of the node (its type, address, device name and so on). Sysfs provides bits of information about running devices in the following format: +/* + * DST sysfs tree for device called 'storage': + * + * /sys/bus/dst/devices/storage/ + * /sys/bus/dst/devices/storage/type : 192.168.4.80:1025 + * /sys/bus/dst/devices/storage/size : 800 + * /sys/bus/dst/devices/storage/name : storage + */ DST header contains structure definitions and protocol command description. Signed-off-by: Evgeniy Polyakov <zbr@ioremap.net> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
* connector: create connector workqueue only while needed onceFrederic Weisbecker2009-02-021-0/+8
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The netlink connector uses its own workqueue to relay the datas sent from userspace to the appropriate callback. If you launch the test from Documentation/connector and change it a bit to send a high flow of data, you will see thousands of events coming to the "cqueue" workqueue by looking at the workqueue tracer. This flow of events can be sent very quickly. So, to not encumber the kevent workqueue and delay other jobs, the "cqueue" workqueue should remain. But this workqueue is pointless most of the time, it will always be created (assuming you have built it of course) although only developpers with specific needs will use it. So avoid this "most of the time useless task", this patch proposes to create this workqueue only when needed once. The first jobs to be sent to connector callbacks will be sent to kevent while the "cqueue" thread creation will be scheduled to kevent too. The following jobs will continue to be scheduled to keventd until the cqueue workqueue is created, and then the rest of the jobs will continue to perform as usual, through this dedicated workqueue. Each time I tested this patch, only the first event was sent to keventd, the rest has been sent to cqueue which have been created quickly. Also, this patch fixes some trailing whitespaces on the connector files. Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com> Acked-by: Evgeniy Polyakov <zbr@ioremap.net> Signed-off-by: David S. Miller <davem@davemloft.net>
* include of <linux/types.h> is preferred over <asm/types.h>Jaswinder Singh Rajput2009-01-151-1/+1
| | | | | | | | | | | | Impact: fix 15 make headers_check warnings: include of <linux/types.h> is preferred over <asm/types.h> Signed-off-by: Jaswinder Singh Rajput <jaswinderrajput@gmail.com> Cc: Ingo Molnar <mingo@elte.hu> Cc: Sam Ravnborg <sam@ravnborg.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* connector: add a BlackBoard user to connectorJerome Arbez-Gindre2008-07-301-1/+2
| | | | | | | | | | | Add a BlackBoard user to connector. BlackBoard is part of the TSP GPL sampling framework (http://savannah.nongnu.org/p/tsp) [akpm@linux-foundation.org: add comment] Signed-off-by: Jerome Arbez-Gindre <jeromearbezgindre@gmail.com> Acked-by: Evgeniy Polyakov <johnpol@2ka.mipt.ru> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* CONNECTOR: make cn_already_initialized staticLi Zefan2008-02-261-2/+0
| | | | | | | It is used in connector.c only, so make it static. Signed-off-by: Li Zefan <lizf@cn.fujitsu.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* [CONNECTOR]: Cleanup struct cn_callback_entryLi Zefan2008-01-281-3/+1
| | | | | | | | | | | | | | | - 'cb' is a fake struct member. In a previous patch struct cn_callback was renamed to cn_callback_id, so 'cb' should have been deleted at that time. - 'nls' isn't used and is redundant, we can retrieve this data through cn_callback_entry.pdev->nls. - 'seq' and 'group' should be u32, as they are declared to be u32 in other places. Signed-off-by: Li Zefan <lizf@cn.fujitsu.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* [CONNECTOR]: Cleanup struct cn_queue_devLi Zefan2008-01-281-1/+0
| | | | | | | | Struct member netlink_groups is never used, and I don't see how it can be useful. Signed-off-by: Li Zefan <lizf@cn.fujitsu.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* uvesafb: add connector entriesMichal Januszewski2007-10-161-2/+3
| | | | | | | | | | Add connector idx and val constants for v86d and uvesafb. Signed-off-by: Michal Januszewski <spock@gentoo.org> Signed-off-by: Antonino Daplas <adaplas@gmail.com> Cc: Evgeniy Polyakov <johnpol@2ka.mipt.ru> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* connector: change connector's max message sizeMichal Januszewski2007-10-161-1/+1
| | | | | | | | | | | Change the maximum message size to 16k to allow transfers of VBE data blocks from userspace. Signed-off-by: Michal Januszewski <spock@gentoo.org> Signed-off-by: Antonino Daplas <adaplas@gmail.com> Cc: Evgeniy Polyakov <johnpol@2ka.mipt.ru> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* [NET]: make netlink user -> kernel interface synchroniousDenis V. Lunev2007-10-101-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch make processing netlink user -> kernel messages synchronious. This change was inspired by the talk with Alexey Kuznetsov about current netlink messages processing. He says that he was badly wrong when introduced asynchronious user -> kernel communication. The call netlink_unicast is the only path to send message to the kernel netlink socket. But, unfortunately, it is also used to send data to the user. Before this change the user message has been attached to the socket queue and sk->sk_data_ready was called. The process has been blocked until all pending messages were processed. The bad thing is that this processing may occur in the arbitrary process context. This patch changes nlk->data_ready callback to get 1 skb and force packet processing right in the netlink_unicast. Kernel -> user path in netlink_unicast remains untouched. EINTR processing for in netlink_run_queue was changed. It forces rtnl_lock drop, but the process remains in the cycle until the message will be fully processed. So, there is no need to use this kludges now. Signed-off-by: Denis V. Lunev <den@openvz.org> Acked-by: Alexey Kuznetsov <kuznet@ms2.inr.ac.ru> Signed-off-by: David S. Miller <davem@davemloft.net>
* [CONNECTOR]: Replace delayed work with usual work queue.Evgeniy Polyakov2006-12-181-1/+1
| | | | | Signed-off-by: Evgeniy Polyakov <johnpol@2ka.mipt.ru> Signed-off-by: David S. Miller <davem@davemloft.net>
* WorkStruct: make allyesconfigDavid Howells2006-11-221-2/+2
| | | | | | Fix up for make allyesconfig. Signed-Off-By: David Howells <dhowells@redhat.com>
* [PATCH] w1: Move w1-connector definitions into linux/include/connector.hEvgeniy Polyakov2006-06-221-1/+4
| | | | | Signed-off-by: Evgeniy Polyakov <johnpol@2ka.mipt.ru> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
* [CIFS] Reserve upcall IDX value for CIFS with connector header and addSteve French2005-11-101-0/+2
| | | | | | Kconfig option for CIFS upcall. Signed-off-by: Steve French <sfrench@us.ibm.com>
* [PATCH] Process Events ConnectorMatt Helsley2005-11-071-0/+6
| | | | | | | | | | | | 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>
* [PATCH] gfp flags annotations - part 1Al Viro2005-10-081-1/+1
| | | | | | | | | | | | - added typedef unsigned int __nocast gfp_t; - replaced __nocast uses for gfp flags with gfp_t - it gives exactly the same warnings as far as sparse is concerned, doesn't change generated code (from gcc point of view we replaced unsigned int with typedef) and documents what's going on far better. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [CONNECTOR]: fix sparse gfp nocast warningsRandy Dunlap2005-10-041-1/+1
| | | | | | | | | Fix implicit nocast warnings in connector code: drivers/connector/connector.c:102:24: warning: implicit cast to nocast type drivers/connector/connector.c:114:45: warning: implicit cast to nocast type Signed-off-by: Randy Dunlap <rdunlap@xenotime.net> Signed-off-by: David S. Miller <davem@davemloft.net>
* [CONNECTOR]: async connector mode.Evgeniy Polyakov2005-09-261-6/+15
| | | | | | | | | | | | If input message rate from userspace is too high, do not drop them, but try to deliver using work queue allocation. Failing there is some kind of congestion control. It also removes warn_on on this condition, which scares people. Signed-off-by: Evgeniy Polyakov <johnpol@2ka.mipt.ru> Signed-off-by: David S. Miller <davem@davemloft.net>
* [NET]: Add netlink connector.Evgeniy Polyakov2005-09-111-0/+158
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>
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