linux-toradex.git/include/linux/connector.h, branch v2.6.31.2

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

connector: add a BlackBoard user to connector

2008-07-30T16:41:45+00:00

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 
Acked-by: Evgeniy Polyakov 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

CONNECTOR: make cn_already_initialized static

2008-02-27T02:42:44+00:00

It is used in connector.c only, so make it static.

Signed-off-by: Li Zefan 
Signed-off-by: David S. Miller

[CONNECTOR]: Cleanup struct cn_callback_entry

2008-01-28T23:00:40+00:00

- '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 
Signed-off-by: David S. Miller

[CONNECTOR]: Cleanup struct cn_queue_dev

2008-01-28T23:00:39+00:00

Struct member netlink_groups is never used, and I don't see how it can
be useful.

Signed-off-by: Li Zefan 
Signed-off-by: David S. Miller

uvesafb: add connector entries

2007-10-16T16:43:13+00:00

Add connector idx and val constants for v86d and uvesafb.

Signed-off-by: Michal Januszewski 
Signed-off-by: Antonino Daplas 
Cc: Evgeniy Polyakov 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

connector: change connector's max message size

2007-10-16T16:43:13+00:00

Change the maximum message size to 16k to allow transfers of VBE
data blocks from userspace.

Signed-off-by: Michal Januszewski 
Signed-off-by: Antonino Daplas 
Cc: Evgeniy Polyakov 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds