user/sven/linux.git/drivers/connector, branch v3.0

Connector: Correctly set the error code in case of success when dispatching receive callbacks

2011-06-07T19:02:00Z

The recent changes to the connector code introduced this bug where even when a callback was invoked, we would return an error resulting in double freeing of the skb. This patch fixes this bug. Signed-off-by: K. Y. Srinivasan Acked-by: Evgeniy Polyakov Cc: stable [.39] Signed-off-by: Greg Kroah-Hartman

connector: fix skb double free in cn_rx_skb()

2011-04-12T21:38:57Z

When a skb is delivered to a registered callback, cn_call_callback() incorrectly returns -ENODEV after freeing the skb, causing cn_rx_skb() to free the skb a second time. Reported-by: Eric B Munson Signed-off-by: Patrick McHardy Tested-by: Eric B Munson Signed-off-by: David S. Miller

connector: convert to synchronous netlink message processing

2011-03-31T00:14:33Z

Commits 01a16b21 (netlink: kill eff_cap from struct netlink_skb_parms) and c53fa1ed (netlink: kill loginuid/sessionid/sid members from struct netlink_skb_parms) removed some members from struct netlink_skb_parms that depend on the current context, all netlink users are now required to do synchronous message processing. connector however queues received messages and processes them in a work queue, which is not valid anymore. This patch converts connector to do synchronous message processing by invoking the registered callback handler directly from the netlink receive function. In order to avoid invoking the callback with connector locks held, a reference count is added to struct cn_callback_entry, the reference is taken when finding a matching callback entry on the device's queue_list and released after the callback handler has been invoked. Signed-off-by: Patrick McHardy Acked-by: Evgeniy Polyakov Signed-off-by: David S. Miller

connector: Convert char name to const char name

2011-02-23T21:22:26Z

Allow more const declarations. Signed-off-by: Joe Perches Acked-by: Evgeniy Polyakov Signed-off-by: Greg Kroah-Hartman

connector: Use this_cpu operations

2010-12-17T14:18:05Z

The patch was originally in the use cpuops patchset but it needs an inc_return and is therefore dependent on an extension of the cpu ops. Fixed up and verified that it compiles. get_seq can benefit from this_cpu_operations. Address calculation is avoided and the increment is done using an xadd. Cc: Scott James Remnant Cc: Mike Frysinger Acked-by: H. Peter Anvin Signed-off-by: Christoph Lameter Signed-off-by: Tejun Heo

connector: add module alias

2010-12-10T20:27:49Z

Since connector can be built as a module and uses netlink socket to communicate. The module should have an alias to autoload when socket of NETLINK_CONNECTOR type is requested. Signed-off-by: Stephen Hemminger Acked-by: Evgeniy Polyakov Signed-off-by: David S. Miller

connector: remove lazy workqueue creation

2010-10-24T21:20:01Z

Commit 1a5645bc (connector: create connector workqueue only while needed once) implements lazy workqueue creation for connector workqueue. With cmwq now in place, lazy workqueue creation doesn't make much sense while adding a lot of complexity. Remove it and allocate an ordered workqueue during initialization. This also removes a call to flush_scheduled_work() which is deprecated and scheduled to be removed. Signed-off-by: Tejun Heo Cc: Frederic Weisbecker Signed-off-by: David S. Miller

include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h

2010-03-30T13:02:32Z

percpu.h is included by sched.h and module.h and thus ends up being included when building most .c files. percpu.h includes slab.h which in turn includes gfp.h making everything defined by the two files universally available and complicating inclusion dependencies. percpu.h -> slab.h dependency is about to be removed. Prepare for this change by updating users of gfp and slab facilities include those headers directly instead of assuming availability. As this conversion needs to touch large number of source files, the following script is used as the basis of conversion. http://userweb.kernel.org/~tj/misc/slabh-sweep.py The script does the followings. * Scan files for gfp and slab usages and update includes such that only the necessary includes are there. ie. if only gfp is used, gfp.h, if slab is used, slab.h. * When the script inserts a new include, it looks at the include blocks and try to put the new include such that its order conforms to its surrounding. It's put in the include block which contains core kernel includes, in the same order that the rest are ordered - alphabetical, Christmas tree, rev-Xmas-tree or at the end if there doesn't seem to be any matching order. * If the script can't find a place to put a new include (mostly because the file doesn't have fitting include block), it prints out an error message indicating which .h file needs to be added to the file. The conversion was done in the following steps. 1. The initial automatic conversion of all .c files updated slightly over 4000 files, deleting around 700 includes and adding ~480 gfp.h and ~3000 slab.h inclusions. The script emitted errors for ~400 files. 2. Each error was manually checked. Some didn't need the inclusion, some needed manual addition while adding it to implementation .h or embedding .c file was more appropriate for others. This step added inclusions to around 150 files. 3. The script was run again and the output was compared to the edits from #2 to make sure no file was left behind. 4. Several build tests were done and a couple of problems were fixed. e.g. lib/decompress_*.c used malloc/free() wrappers around slab APIs requiring slab.h to be added manually. 5. The script was run on all .h files but without automatically editing them as sprinkling gfp.h and slab.h inclusions around .h files could easily lead to inclusion dependency hell. Most gfp.h inclusion directives were ignored as stuff from gfp.h was usually wildly available and often used in preprocessor macros. Each slab.h inclusion directive was examined and added manually as necessary. 6. percpu.h was updated not to include slab.h. 7. Build test were done on the following configurations and failures were fixed. CONFIG_GCOV_KERNEL was turned off for all tests (as my distributed build env didn't work with gcov compiles) and a few more options had to be turned off depending on archs to make things build (like ipr on powerpc/64 which failed due to missing writeq). * x86 and x86_64 UP and SMP allmodconfig and a custom test config. * powerpc and powerpc64 SMP allmodconfig * sparc and sparc64 SMP allmodconfig * ia64 SMP allmodconfig * s390 SMP allmodconfig * alpha SMP allmodconfig * um on x86_64 SMP allmodconfig 8. percpu.h modifications were reverted so that it could be applied as a separate patch and serve as bisection point. Given the fact that I had only a couple of failures from tests on step 6, I'm fairly confident about the coverage of this conversion patch. If there is a breakage, it's likely to be something in one of the arch headers which should be easily discoverable easily on most builds of the specific arch. Signed-off-by: Tejun Heo Guess-its-ok-by: Christoph Lameter Cc: Ingo Molnar Cc: Lee Schermerhorn

connector: Delete buggy notification code.

2010-02-02T23:58:48Z

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

connector: Fix incompatible pointer type warning

2009-10-06T08:39:51Z

Commit 7069331 (connector: Provide the sender's credentials to the callback, 2009-10-02) changed callbacks to take two arguments but missed this one. drivers/connector/cn_proc.c: In function ‘cn_proc_init’: drivers/connector/cn_proc.c:263: warning: passing argument 3 of ‘cn_add_callback’ from incompatible pointer type Signed-off-by: Stephen Boyd Signed-off-by: David S. Miller