mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-08-23 01:10:04 +00:00
![Florian Westphal](/assets/img/avatar_default.png)
These no longer register/unregister a meaningful structure so remove it. Cc: Paul Blakey <paulb@nvidia.com> Signed-off-by: Florian Westphal <fw@strlen.de> Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
82 lines
1.7 KiB
C
82 lines
1.7 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
|
|
/*
|
|
* test/set flag bits stored in conntrack extension area.
|
|
*
|
|
* (C) 2013 Astaro GmbH & Co KG
|
|
*/
|
|
|
|
#include <linux/export.h>
|
|
#include <linux/types.h>
|
|
|
|
#include <net/netfilter/nf_conntrack_ecache.h>
|
|
#include <net/netfilter/nf_conntrack_labels.h>
|
|
|
|
static DEFINE_SPINLOCK(nf_connlabels_lock);
|
|
|
|
static int replace_u32(u32 *address, u32 mask, u32 new)
|
|
{
|
|
u32 old, tmp;
|
|
|
|
do {
|
|
old = *address;
|
|
tmp = (old & mask) ^ new;
|
|
if (old == tmp)
|
|
return 0;
|
|
} while (cmpxchg(address, old, tmp) != old);
|
|
|
|
return 1;
|
|
}
|
|
|
|
int nf_connlabels_replace(struct nf_conn *ct,
|
|
const u32 *data,
|
|
const u32 *mask, unsigned int words32)
|
|
{
|
|
struct nf_conn_labels *labels;
|
|
unsigned int size, i;
|
|
int changed = 0;
|
|
u32 *dst;
|
|
|
|
labels = nf_ct_labels_find(ct);
|
|
if (!labels)
|
|
return -ENOSPC;
|
|
|
|
size = sizeof(labels->bits);
|
|
if (size < (words32 * sizeof(u32)))
|
|
words32 = size / sizeof(u32);
|
|
|
|
dst = (u32 *) labels->bits;
|
|
for (i = 0; i < words32; i++)
|
|
changed |= replace_u32(&dst[i], mask ? ~mask[i] : 0, data[i]);
|
|
|
|
size /= sizeof(u32);
|
|
for (i = words32; i < size; i++) /* pad */
|
|
replace_u32(&dst[i], 0, 0);
|
|
|
|
if (changed)
|
|
nf_conntrack_event_cache(IPCT_LABEL, ct);
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL_GPL(nf_connlabels_replace);
|
|
|
|
int nf_connlabels_get(struct net *net, unsigned int bits)
|
|
{
|
|
if (BIT_WORD(bits) >= NF_CT_LABELS_MAX_SIZE / sizeof(long))
|
|
return -ERANGE;
|
|
|
|
spin_lock(&nf_connlabels_lock);
|
|
net->ct.labels_used++;
|
|
spin_unlock(&nf_connlabels_lock);
|
|
|
|
BUILD_BUG_ON(NF_CT_LABELS_MAX_SIZE / sizeof(long) >= U8_MAX);
|
|
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL_GPL(nf_connlabels_get);
|
|
|
|
void nf_connlabels_put(struct net *net)
|
|
{
|
|
spin_lock(&nf_connlabels_lock);
|
|
net->ct.labels_used--;
|
|
spin_unlock(&nf_connlabels_lock);
|
|
}
|
|
EXPORT_SYMBOL_GPL(nf_connlabels_put);
|