linux-toradex.git/ipc/mqueue.c, branch v2.6.27.43

mqueue: fix si_pid value in mqueue do_notify()

2009-02-20T22:36:54+00:00

commit a6684999f7c6bddd75cf9755ad7ff44435f72fff upstream.

If a process registers for asynchronous notification on a POSIX message
queue, it gets a signal and a siginfo_t structure when a message arrives
on the message queue.  The si_pid in the siginfo_t structure is set to the
PID of the process that sent the message to the message queue.

The principle is the following:
. when mq_notify(SIGEV_SIGNAL) is called, the caller registers for
  notification when a msg arrives. The associated pid structure is stroed into
  inode_info->notify_owner. Let's call this process P1.
. when mq_send() is called by say P2, P2 sends a signal to P1 to notify
  him about msg arrival.

The way .si_pid is set today is not correct, since it doesn't take into account
the fact that the process that is sending the message might not be in the
same namespace as the notified one.

This patch proposes to set si_pid to the sender's pid into the notify_owner
namespace.

Signed-off-by: Nadia Derbey 
Signed-off-by: Sukadev Bhattiprolu 
Acked-by: Oleg Nesterov 
Cc: Roland McGrath 
Cc: Bastian Blank 
Cc: Pavel Emelyanov 
Cc: Eric W. Biederman 
Acked-by: Serge Hallyn 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds 
Signed-off-by: Greg Kroah-Hartman

System call wrappers part 26

2009-01-18T18:35:39+00:00

commit c4ea37c26a691ad0b7e86aa5884aab27830e95c9 upstream.

Signed-off-by: Heiko Carstens 
Signed-off-by: Greg Kroah-Hartman

System call wrappers part 25

2009-01-18T18:35:39+00:00

commit d5460c9974a321a194aded4a8c4daaac68ea8171 upstream.

Signed-off-by: Heiko Carstens 
Signed-off-by: Greg Kroah-Hartman

Convert all system calls to return a long

2009-01-18T18:35:30+00:00

commit 2ed7c03ec17779afb4fcfa3b8c61df61bd4879ba upstream.

Convert all system calls to return a long. This should be a NOP since all
converted types should have the same size anyway.
With the exception of sys_exit_group which returned void. But that doesn't
matter since the system call doesn't return.

Signed-off-by: Heiko Carstens 
Signed-off-by: Greg Kroah-Hartman

[PATCH] kill nameidata passing to permission(), rename to inode_permission()

2008-07-27T00:53:31+00:00

Incidentally, the name that gives hundreds of false positives on grep
is not a good idea...

Signed-off-by: Al Viro

SL*B: drop kmem cache argument from constructor

2008-07-26T19:00:07+00:00

Kmem cache passed to constructor is only needed for constructors that are
themselves multiplexeres.  Nobody uses this "feature", nor does anybody uses
passed kmem cache in non-trivial way, so pass only pointer to object.

Non-trivial places are:
	arch/powerpc/mm/init_64.c
	arch/powerpc/mm/hugetlbpage.c

This is flag day, yes.

Signed-off-by: Alexey Dobriyan 
Acked-by: Pekka Enberg 
Acked-by: Christoph Lameter 
Cc: Jon Tollefson 
Cc: Nick Piggin 
Cc: Matt Mackall 
[akpm@linux-foundation.org: fix arch/powerpc/mm/hugetlbpage.c]
[akpm@linux-foundation.org: fix mm/slab.c]
[akpm@linux-foundation.org: fix ubifs]
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

ipc: use simple_read_from_buffer()

2008-07-25T17:53:42+00:00

Also this patch kills unneccesary trailing NULL character.

Signed-off-by: Akinobu Mita 
Cc: Nadia Derbey 
Cc: Manfred Spraul 
Cc: Pierre Peiffer 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

netlink: Remove nonblock parameter from netlink_attachskb

2008-06-05T18:23:39+00:00

Signed-off-by: Denis V. Lunev 
Signed-off-by: David S. Miller

tiny mq_open optimization

2008-05-03T20:50:33+00:00

A very small cleanup for mq_open.

We do not have to call set_close_on_exit if we create the file
descriptor right away with the flag set.  We have a function for this
now.  The resulting code is smaller and a tiny bit faster.

Signed-off-by: Ulrich Drepper 
Signed-off-by: Linus Torvalds

[PATCH] r/o bind mounts: elevate write count for open()s

2008-04-19T04:29:25+00:00

This is the first really tricky patch in the series.  It elevates the writer
count on a mount each time a non-special file is opened for write.

We used to do this in may_open(), but Miklos pointed out that __dentry_open()
is used as well to create filps.  This will cover even those cases, while a
call in may_open() would not have.

There is also an elevated count around the vfs_create() call in open_namei().
See the comments for more details, but we need this to fix a 'create, remount,
fail r/w open()' race.

Some filesystems forego the use of normal vfs calls to create
struct files.   Make sure that these users elevate the mnt
writer count because they will get __fput(), and we need
to make sure they're balanced.

Acked-by: Al Viro 
Signed-off-by: Christoph Hellwig 
Signed-off-by: Dave Hansen 
Signed-off-by: Andrew Morton 
Signed-off-by: Al Viro