linux.git/net/core/sysctl_net_core.c, branch v2.6.27

printk ratelimiting rewrite

2008-07-25T17:53:29+00:00

All ratelimit user use same jiffies and burst params, so some messages
(callbacks) will be lost.

For example:
a call printk_ratelimit(5 * HZ, 1)
b call printk_ratelimit(5 * HZ, 1) before the 5*HZ timeout of a, then b will
will be supressed.

- rewrite __ratelimit, and use a ratelimit_state as parameter.  Thanks for
  hints from andrew.

- Add WARN_ON_RATELIMIT, update rcupreempt.h

- remove __printk_ratelimit

- use __ratelimit in net_ratelimit

Signed-off-by: Dave Young 
Cc: "David S. Miller" 
Cc: "Paul E. McKenney" 
Cc: Dave Young 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

netns: Register net/core/ sysctls at read-only root.

2008-05-19T20:49:52+00:00

Most of the net/core/xxx sysctls are read-only now, but this
goal is achieved with excessive memory consumption in each
namespace - the whole table is cloned and most of the entries
in it are ~= 0222.

Split it into two parts and register (the largest) one at the
read-only root.

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

[NETNS]: Introduce a netns_core structure.

2008-04-01T02:41:14+00:00

There's already some stuff on the struct net, that should better
be folded into netns_core structure. I'm making the per-proto inuse 
counter be per-net also, which is also a candidate for this, so 
introduce this structure and populate it a bit.

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

[NET] sysctl: make sysctl_somaxconn per-namespace

2008-01-28T22:56:57+00:00

Just move the variable on the struct net and adjust
its usage.

Others sysctls from sys.net.core table are more
difficult to virtualize (i.e. make them per-namespace),
but I'll look at them as well a bit later.

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

[NET] sysctl: prepare core tables to point to netns variables

2008-01-28T22:56:56+00:00

Some of ctl variables are going to be on the struct
net. Here's the way to adjust the ->data pointer on the
ctl_table-s to point on the right variable.

Since some pointers still point on the global variables,
I keep turning the write bits off on such tables.

This looks to become a common procedure for net sysctls,
so later parts of this code may migrate to some more
generic place.

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

[NET] sysctl: make the sys.net.core sysctls per-namespace

2008-01-28T22:56:56+00:00

Making them per-namespace is required for the following
two reasons:

 First, some ctl values have a per-namespace meaning.
 Second, making them writable from the sub-namespace
 is an isolation hole.

So I introduce the pernet operations to create these
tables. For init_net I use the existing statically
declared tables, for sub-namespace they are duplicated
and the write bits are removed from the mode.

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

[NET]: Isolate the net/core/ sysctl table

2008-01-28T22:56:26+00:00

Using ctl paths we can put all the stuff, related to net/core/
sysctl table, into one file and remove all the references on it.

As a good side effect this hides the "core_table" name from
the global scope :)

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

[NET]: Remove unneeded ifdefs from sysctl_net_core.c

2008-01-28T22:56:25+00:00

This file is already compiled out when the SYSCTL=n, so
these ifdefs, that enclose the whole file, can be removed.

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

[NET]: Don't declare extern variables in net/core/sysctl_net_core.c

2007-10-24T04:27:56+00:00

Some are already declared in include/linux/netdevice.h, while
some others (xfrm ones) need to be declared.

The driver/net/rrunner.c just uses same extern as well, so
cleanup it also.

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

[XFRM]: Allow XFRM_ACQ_EXPIRES to be tunable via sysctl.

2007-05-31T08:23:23+00:00

Signed-off-by: David S. Miller