linux-toradex.git/include/linux/connector.h, branch v2.6.36-rc5

connector: Delete buggy notification code.

2010-02-02T23:58:48+00:00

On Tue, Feb 02, 2010 at 02:57:14PM -0800, Greg KH (gregkh@suse.de) wrote:
> > There are at least two ways to fix it: using a big cannon and a small
> > one. The former way is to disable notification registration, since it is
> > not used by anyone at all. Second way is to check whether calling
> > process is root and its destination group is -1 (kind of priveledged
> > one) before command is dispatched to workqueue.
> 
> Well if no one is using it, removing it makes the most sense, right?
> 
> No objection from me, care to make up a patch either way for this?

Getting it is not used, let's drop support for notifications about
(un)registered events from connector.
Another option was to check credentials on receiving, but we can always
restore it without bugs if needed, but genetlink has a wider code base
and none complained, that userspace can not get notification when some
other clients were (un)registered.

Kudos for Sebastian Krahmer , who found a bug in the
code.

Signed-off-by: Evgeniy Polyakov 
Acked-by: Greg Kroah-Hartman 
Signed-off-by: David S. Miller

drbd: moved CN_IDX_DRBD and CN_VAL_DRBD to the right file

2009-11-25T16:57:36+00:00

Signed-off-by: Philipp Reisner 
Signed-off-by: Lars Ellenberg

connector: Removed the destruct_data callback since it is always kfree_skb()

2009-10-02T17:54:05+00:00

Signed-off-by: Philipp Reisner 
Acked-by: Lars Ellenberg 
Acked-by: Evgeniy Polyakov 
Signed-off-by: David S. Miller

connector: Provide the sender's credentials to the callback

2009-10-02T17:54:01+00:00

Signed-off-by: Philipp Reisner 
Acked-by: Lars Ellenberg 
Acked-by: Evgeniy Polyakov 
Signed-off-by: David S. Miller

connector: Keep the skb in cn_callback_data

2009-10-02T17:53:58+00:00

Signed-off-by: Philipp Reisner 
Acked-by: Lars Ellenberg 
Acked-by: Evgeniy Polyakov 
Signed-off-by: David S. Miller

connector: make callback argument type explicit

2009-07-17T17:13:21+00:00

The connector documentation states that the argument to the callback
function is always a pointer to a struct cn_msg, but rather than encode it
in the API itself, it uses a void pointer everywhere.  This doesn't make
much sense to encode the pointer in documentation as it prevents proper C
type checking from occurring and can easily allow people to use the wrong
pointer type.  So convert the argument type to an explicit struct cn_msg
pointer.

Signed-off-by: Mike Frysinger 
Signed-off-by: David S. Miller

dm raid1: add userspace log

2009-06-22T09:12:35+00:00

This patch contains a device-mapper mirror log module that forwards
requests to userspace for processing.

The structures used for communication between kernel and userspace are
located in include/linux/dm-log-userspace.h.  Due to the frequency,
diversity, and 2-way communication nature of the exchanges between
kernel and userspace, 'connector' was chosen as the interface for
communication.

The first log implementations written in userspace - "clustered-disk"
and "clustered-core" - support clustered shared storage.   A userspace
daemon (in the LVM2 source code repository) uses openAIS/corosync to
process requests in an ordered fashion with the rest of the nodes in the
cluster so as to prevent log state corruption.  Other implementations
with no association to LVM or openAIS/corosync, are certainly possible.

(Imagine if two machines are writing to the same region of a mirror.
They would both mark the region dirty, but you need a cluster-aware
entity that can handle properly marking the region clean when they are
done.  Otherwise, you might clear the region when the first machine is
done, not the second.)

Signed-off-by: Jonathan Brassow 
Cc: Evgeniy Polyakov 
Signed-off-by: Alasdair G Kergon

Staging: dst: core files.

2009-04-03T21:53:32+00:00

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 
Signed-off-by: Greg Kroah-Hartman

connector: create connector workqueue only while needed once

2009-02-03T07:22:04+00:00

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 
Acked-by: Evgeniy Polyakov 
Signed-off-by: David S. Miller

include of is preferred over

2009-01-16T00:39:41+00:00

Impact: fix 15 make headers_check warnings:

include of  is preferred over 

Signed-off-by: Jaswinder Singh Rajput 
Cc: Ingo Molnar 
Cc: Sam Ravnborg 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds