Return to nf_conntrack_ecache.c CVS log

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Update 2.6.x-xfs to 2.6.23-rc4.

Also update fs/xfs with external mainline changes.
There were 12 such missing commits that I detected:

--------
commit ad690ef9e690f6c31f7d310b09ef1314bcec9033
Author: Al Viro <viro@ftp.linux.org.uk>
    xfs ioctl __user annotations

commit 20c2df83d25c6a95affe6157a4c9cac4cf5ffaac
Author: Paul Mundt <lethal@linux-sh.org>
    mm: Remove slab destructors from kmem_cache_create().

commit d0217ac04ca6591841e5665f518e38064f4e65bd
Author: Nick Piggin <npiggin@suse.de>
    mm: fault feedback #1

commit 54cb8821de07f2ffcd28c380ce9b93d5784b40d7
Author: Nick Piggin <npiggin@suse.de>
    mm: merge populate and nopage into fault (fixes nonlinear)

commit d00806b183152af6d24f46f0c33f14162ca1262a
Author: Nick Piggin <npiggin@suse.de>
    mm: fix fault vs invalidate race for linear mappings

commit a569425512253992cc64ebf8b6d00a62f986db3e
Author: Christoph Hellwig <hch@infradead.org>
    knfsd: exportfs: add exportfs.h header

commit 831441862956fffa17b9801db37e6ea1650b0f69
Author: Rafael J. Wysocki <rjw@sisk.pl>
    Freezer: make kernel threads nonfreezable by default

commit 8e1f936b73150f5095448a0fee6d4f30a1f9001d
Author: Rusty Russell <rusty@rustcorp.com.au>
    mm: clean up and kernelify shrinker registration

commit 5ffc4ef45b3b0a57872f631b4e4ceb8ace0d7496
Author: Jens Axboe <jens.axboe@oracle.com>
    sendfile: remove .sendfile from filesystems that use generic_file_sendfile()

commit 8bb7844286fb8c9fce6f65d8288aeb09d03a5e0d
Author: Rafael J. Wysocki <rjw@sisk.pl>
    Add suspend-related notifications for CPU hotplug

commit 59c51591a0ac7568824f541f57de967e88adaa07
Author: Michael Opdenacker <michael@free-electrons.com>
    Fix occurrences of "the the "

commit 0ceb331433e8aad9c5f441a965d7c681f8b9046f
Author: Dmitriy Monakhov <dmonakhov@openvz.org>
    mm: move common segment checks to separate helper function
--------
Merge of 2.6.x-xfs-melb:linux:29656b by kenmcd.

/* Event cache for netfilter. */

/* (C) 1999-2001 Paul `Rusty' Russell
 * (C) 2002-2006 Netfilter Core Team <coreteam@netfilter.org>
 * (C) 2003,2004 USAGI/WIDE Project <http://www.linux-ipv6.org>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 */

#include <linux/types.h>
#include <linux/netfilter.h>
#include <linux/skbuff.h>
#include <linux/vmalloc.h>
#include <linux/stddef.h>
#include <linux/err.h>
#include <linux/percpu.h>
#include <linux/notifier.h>
#include <linux/kernel.h>
#include <linux/netdevice.h>

#include <net/netfilter/nf_conntrack.h>
#include <net/netfilter/nf_conntrack_core.h>

ATOMIC_NOTIFIER_HEAD(nf_conntrack_chain);
EXPORT_SYMBOL_GPL(nf_conntrack_chain);

ATOMIC_NOTIFIER_HEAD(nf_ct_expect_chain);
EXPORT_SYMBOL_GPL(nf_ct_expect_chain);

DEFINE_PER_CPU(struct nf_conntrack_ecache, nf_conntrack_ecache);
EXPORT_PER_CPU_SYMBOL_GPL(nf_conntrack_ecache);

/* deliver cached events and clear cache entry - must be called with locally
 * disabled softirqs */
static inline void
__nf_ct_deliver_cached_events(struct nf_conntrack_ecache *ecache)
{
	if (nf_ct_is_confirmed(ecache->ct) && !nf_ct_is_dying(ecache->ct)
	    && ecache->events)
		atomic_notifier_call_chain(&nf_conntrack_chain, ecache->events,
				    ecache->ct);

	ecache->events = 0;
	nf_ct_put(ecache->ct);
	ecache->ct = NULL;
}

/* Deliver all cached events for a particular conntrack. This is called
 * by code prior to async packet handling for freeing the skb */
void nf_ct_deliver_cached_events(const struct nf_conn *ct)
{
	struct nf_conntrack_ecache *ecache;

	local_bh_disable();
	ecache = &__get_cpu_var(nf_conntrack_ecache);
	if (ecache->ct == ct)
		__nf_ct_deliver_cached_events(ecache);
	local_bh_enable();
}
EXPORT_SYMBOL_GPL(nf_ct_deliver_cached_events);

/* Deliver cached events for old pending events, if current conntrack != old */
void __nf_ct_event_cache_init(struct nf_conn *ct)
{
	struct nf_conntrack_ecache *ecache;

	/* take care of delivering potentially old events */
	ecache = &__get_cpu_var(nf_conntrack_ecache);
	BUG_ON(ecache->ct == ct);
	if (ecache->ct)
		__nf_ct_deliver_cached_events(ecache);
	/* initialize for this conntrack/packet */
	ecache->ct = ct;
	nf_conntrack_get(&ct->ct_general);
}
EXPORT_SYMBOL_GPL(__nf_ct_event_cache_init);

/* flush the event cache - touches other CPU's data and must not be called
 * while packets are still passing through the code */
void nf_ct_event_cache_flush(void)
{
	struct nf_conntrack_ecache *ecache;
	int cpu;

	for_each_possible_cpu(cpu) {
		ecache = &per_cpu(nf_conntrack_ecache, cpu);
		if (ecache->ct)
			nf_ct_put(ecache->ct);
	}
}

int nf_conntrack_register_notifier(struct notifier_block *nb)
{
	return atomic_notifier_chain_register(&nf_conntrack_chain, nb);
}
EXPORT_SYMBOL_GPL(nf_conntrack_register_notifier);

int nf_conntrack_unregister_notifier(struct notifier_block *nb)
{
	return atomic_notifier_chain_unregister(&nf_conntrack_chain, nb);
}
EXPORT_SYMBOL_GPL(nf_conntrack_unregister_notifier);

int nf_ct_expect_register_notifier(struct notifier_block *nb)
{
	return atomic_notifier_chain_register(&nf_ct_expect_chain, nb);
}
EXPORT_SYMBOL_GPL(nf_ct_expect_register_notifier);

int nf_ct_expect_unregister_notifier(struct notifier_block *nb)
{
	return atomic_notifier_chain_unregister(&nf_ct_expect_chain, nb);
}
EXPORT_SYMBOL_GPL(nf_ct_expect_unregister_notifier);