linux-toradex.git/net/unix, branch v2.6.25.17

Introduce path_put()

2008-02-15T05:13:33+00:00

* Add path_put() functions for releasing a reference to the dentry and
  vfsmount of a struct path in the right order

* Switch from path_release(nd) to path_put(&nd->path)

* Rename dput_path() to path_put_conditional()

[akpm@linux-foundation.org: fix cifs]
Signed-off-by: Jan Blunck 
Signed-off-by: Andreas Gruenbacher 
Acked-by: Christoph Hellwig 
Cc: 
Cc: Al Viro 
Cc: Steven French 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

Embed a struct path into struct nameidata instead of nd->{dentry,mnt}

2008-02-15T05:13:33+00:00

This is the central patch of a cleanup series. In most cases there is no good
reason why someone would want to use a dentry for itself. This series reflects
that fact and embeds a struct path into nameidata.

Together with the other patches of this series
- it enforced the correct order of getting/releasing the reference count on
   pairs
- it prepares the VFS for stacking support since it is essential to have a
  struct path in every place where the stack can be traversed
- it reduces the overall code size:

without patch series:
   text    data     bss     dec     hex filename
5321639  858418  715768 6895825  6938d1 vmlinux

with patch series:
   text    data     bss     dec     hex filename
5320026  858418  715768 6894212  693284 vmlinux

This patch:

Switch from nd->{dentry,mnt} to nd->path.{dentry,mnt} everywhere.

[akpm@linux-foundation.org: coding-style fixes]
[akpm@linux-foundation.org: fix cifs]
[akpm@linux-foundation.org: fix smack]
Signed-off-by: Jan Blunck 
Signed-off-by: Andreas Gruenbacher 
Acked-by: Christoph Hellwig 
Cc: Al Viro 
Cc: Casey Schaufler 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

[NET]: Add some acquires/releases sparse annotations.

2008-01-28T23:00:31+00:00

Add __acquires() and __releases() annotations to suppress some sparse
warnings.

example of warnings :

net/ipv4/udp.c:1555:14: warning: context imbalance in 'udp_seq_start' - wrong
count at exit
net/ipv4/udp.c:1571:13: warning: context imbalance in 'udp_seq_stop' -
unexpected unlock

Signed-off-by: Eric Dumazet 
Signed-off-by: David S. Miller

[NETNS]: struct net content re-work (v3)

2008-01-28T22:57:14+00:00

Recently David Miller and Herbert Xu pointed out that struct net becomes
overbloated and un-maintainable. There are two solutions:
- provide a pointer to a network subsystem definition from struct net.
  This costs an additional dereferrence
- place sub-system definition into the structure itself. This will speedup
  run-time access at the cost of recompilation time

The second approach looks better for us. Other sub-systems will follow.

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

[UNIX]: Make the unix sysctl tables per-namespace

2008-01-28T22:55:23+00:00

This is the core.

 * add the ctl_table_header on the struct net;
 * make the unix_sysctl_register and _unregister clone the table;
 * moves calls to them into per-net init and exit callbacks;
 * move the .data pointer in the proper place.

Signed-off-by: Pavel Emelyanov 
Acked-by: Eric W. Biederman 
Signed-off-by: Herbert Xu 
Signed-off-by: David S. Miller

[UNIX]: Use ctl paths to register unix ctl tables

2008-01-28T22:55:22+00:00

Unlike previous ones, this patch is useful by its own,
as it decreases the vmlinux size :)

But it will be used later, when the per-namespace sysctl
is added.

Signed-off-by: Pavel Emelyanov 
Acked-by: Eric W. Biederman 
Signed-off-by: Herbert Xu 
Signed-off-by: David S. Miller

[UNIX]: Move the sysctl_unix_max_dgram_qlen

2008-01-28T22:55:22+00:00

This will make all the sub-namespaces always use the
default value (10) and leave the tuning via sysctl
to the init namespace only.

Per-namespace tuning is coming.

Signed-off-by: Pavel Emelyanov 
Acked-by: Eric W. Biederman 
Signed-off-by: Herbert Xu 
Signed-off-by: David S. Miller

[UNIX]: Extend unix_sysctl_(un)register prototypes

2008-01-28T22:55:21+00:00

Add the struct net * argument to both of them to use in
the future. Also make the register one return an error code.

It is useless right now, but will make the future patches
much simpler.

Signed-off-by: Pavel Emelyanov 
Acked-by: Eric W. Biederman 
Signed-off-by: Herbert Xu 
Signed-off-by: David S. Miller

[NET]: Name magic constants in sock_wake_async()

2008-01-28T22:55:03+00:00

The sock_wake_async() performs a bit different actions
depending on "how" argument. Unfortunately this argument
ony has numerical magic values.

I propose to give names to their constants to help people
reading this function callers understand what's going on
without looking into this function all the time.

I suppose this is 2.6.25 material, but if it's not (or the
naming seems poor/bad/awful), I can rework it against the
current net-2.6 tree.

Signed-off-by: Pavel Emelyanov 
Signed-off-by: Herbert Xu 
Signed-off-by: David S. Miller

[UNIX] Move the unix sock iterators in to proper place

2008-01-28T22:54:49+00:00

The first_unix_socket() and next_unix_sockets() are now used
in proc file and in forall_unix_socets macro only.

The forall_unix_sockets is not used in this file at all so
remove it. After this move the helpers to where they really
belong, i.e. closer to proc code under the #ifdef CONFIG_PROC_FS
option.

Signed-off-by: Pavel Emelyanov 
Signed-off-by: Herbert Xu 
Signed-off-by: David S. Miller