forked from luck/tmp_suning_uos_patched
netfilter: ebt_ulog: add net namespace support for ebt_ulog
Add pernet support to ebt_ulog by means of the new nf_log_set
function added in (30e0c6a
netfilter: nf_log: prepare net
namespace support for loggers).
This patch also make ulog_buffers and netlink socket
ebtulognl per netns.
Signed-off-by: Gao feng <gaofeng@cn.fujitsu.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
This commit is contained in:
parent
69b34fb996
commit
5b175b7ebd
|
@ -41,6 +41,7 @@
|
|||
#include <linux/netfilter_bridge/ebtables.h>
|
||||
#include <linux/netfilter_bridge/ebt_ulog.h>
|
||||
#include <net/netfilter/nf_log.h>
|
||||
#include <net/netns/generic.h>
|
||||
#include <net/sock.h>
|
||||
#include "../br_private.h"
|
||||
|
||||
|
@ -62,13 +63,22 @@ typedef struct {
|
|||
spinlock_t lock; /* the per-queue lock */
|
||||
} ebt_ulog_buff_t;
|
||||
|
||||
static ebt_ulog_buff_t ulog_buffers[EBT_ULOG_MAXNLGROUPS];
|
||||
static struct sock *ebtulognl;
|
||||
static int ebt_ulog_net_id __read_mostly;
|
||||
struct ebt_ulog_net {
|
||||
unsigned int nlgroup[EBT_ULOG_MAXNLGROUPS];
|
||||
ebt_ulog_buff_t ulog_buffers[EBT_ULOG_MAXNLGROUPS];
|
||||
struct sock *ebtulognl;
|
||||
};
|
||||
|
||||
static struct ebt_ulog_net *ebt_ulog_pernet(struct net *net)
|
||||
{
|
||||
return net_generic(net, ebt_ulog_net_id);
|
||||
}
|
||||
|
||||
/* send one ulog_buff_t to userspace */
|
||||
static void ulog_send(unsigned int nlgroup)
|
||||
static void ulog_send(struct ebt_ulog_net *ebt, unsigned int nlgroup)
|
||||
{
|
||||
ebt_ulog_buff_t *ub = &ulog_buffers[nlgroup];
|
||||
ebt_ulog_buff_t *ub = &ebt->ulog_buffers[nlgroup];
|
||||
|
||||
del_timer(&ub->timer);
|
||||
|
||||
|
@ -80,7 +90,7 @@ static void ulog_send(unsigned int nlgroup)
|
|||
ub->lastnlh->nlmsg_type = NLMSG_DONE;
|
||||
|
||||
NETLINK_CB(ub->skb).dst_group = nlgroup + 1;
|
||||
netlink_broadcast(ebtulognl, ub->skb, 0, nlgroup + 1, GFP_ATOMIC);
|
||||
netlink_broadcast(ebt->ebtulognl, ub->skb, 0, nlgroup + 1, GFP_ATOMIC);
|
||||
|
||||
ub->qlen = 0;
|
||||
ub->skb = NULL;
|
||||
|
@ -89,10 +99,15 @@ static void ulog_send(unsigned int nlgroup)
|
|||
/* timer function to flush queue in flushtimeout time */
|
||||
static void ulog_timer(unsigned long data)
|
||||
{
|
||||
spin_lock_bh(&ulog_buffers[data].lock);
|
||||
if (ulog_buffers[data].skb)
|
||||
ulog_send(data);
|
||||
spin_unlock_bh(&ulog_buffers[data].lock);
|
||||
struct ebt_ulog_net *ebt = container_of((void *)data,
|
||||
struct ebt_ulog_net,
|
||||
nlgroup[*(unsigned int *)data]);
|
||||
|
||||
ebt_ulog_buff_t *ub = &ebt->ulog_buffers[*(unsigned int *)data];
|
||||
spin_lock_bh(&ub->lock);
|
||||
if (ub->skb)
|
||||
ulog_send(ebt, *(unsigned int *)data);
|
||||
spin_unlock_bh(&ub->lock);
|
||||
}
|
||||
|
||||
static struct sk_buff *ulog_alloc_skb(unsigned int size)
|
||||
|
@ -123,8 +138,10 @@ static void ebt_ulog_packet(unsigned int hooknr, const struct sk_buff *skb,
|
|||
ebt_ulog_packet_msg_t *pm;
|
||||
size_t size, copy_len;
|
||||
struct nlmsghdr *nlh;
|
||||
struct net *net = dev_net(in ? in : out);
|
||||
struct ebt_ulog_net *ebt = ebt_ulog_pernet(net);
|
||||
unsigned int group = uloginfo->nlgroup;
|
||||
ebt_ulog_buff_t *ub = &ulog_buffers[group];
|
||||
ebt_ulog_buff_t *ub = &ebt->ulog_buffers[group];
|
||||
spinlock_t *lock = &ub->lock;
|
||||
ktime_t kt;
|
||||
|
||||
|
@ -146,7 +163,7 @@ static void ebt_ulog_packet(unsigned int hooknr, const struct sk_buff *skb,
|
|||
if (!(ub->skb = ulog_alloc_skb(size)))
|
||||
goto unlock;
|
||||
} else if (size > skb_tailroom(ub->skb)) {
|
||||
ulog_send(group);
|
||||
ulog_send(ebt, group);
|
||||
|
||||
if (!(ub->skb = ulog_alloc_skb(size)))
|
||||
goto unlock;
|
||||
|
@ -205,7 +222,7 @@ static void ebt_ulog_packet(unsigned int hooknr, const struct sk_buff *skb,
|
|||
ub->lastnlh = nlh;
|
||||
|
||||
if (ub->qlen >= uloginfo->qthreshold)
|
||||
ulog_send(group);
|
||||
ulog_send(ebt, group);
|
||||
else if (!timer_pending(&ub->timer)) {
|
||||
ub->timer.expires = jiffies + flushtimeout * HZ / 100;
|
||||
add_timer(&ub->timer);
|
||||
|
@ -277,47 +294,39 @@ static struct nf_logger ebt_ulog_logger __read_mostly = {
|
|||
.me = THIS_MODULE,
|
||||
};
|
||||
|
||||
static int __init ebt_ulog_init(void)
|
||||
static int __net_init ebt_ulog_net_init(struct net *net)
|
||||
{
|
||||
int ret;
|
||||
int i;
|
||||
struct ebt_ulog_net *ebt = ebt_ulog_pernet(net);
|
||||
|
||||
struct netlink_kernel_cfg cfg = {
|
||||
.groups = EBT_ULOG_MAXNLGROUPS,
|
||||
};
|
||||
|
||||
if (nlbufsiz >= 128*1024) {
|
||||
pr_warning("Netlink buffer has to be <= 128kB,"
|
||||
" please try a smaller nlbufsiz parameter.\n");
|
||||
return -EINVAL;
|
||||
}
|
||||
|
||||
/* initialize ulog_buffers */
|
||||
for (i = 0; i < EBT_ULOG_MAXNLGROUPS; i++) {
|
||||
setup_timer(&ulog_buffers[i].timer, ulog_timer, i);
|
||||
spin_lock_init(&ulog_buffers[i].lock);
|
||||
ebt->nlgroup[i] = i;
|
||||
setup_timer(&ebt->ulog_buffers[i].timer, ulog_timer,
|
||||
(unsigned long)&ebt->nlgroup[i]);
|
||||
spin_lock_init(&ebt->ulog_buffers[i].lock);
|
||||
}
|
||||
|
||||
ebtulognl = netlink_kernel_create(&init_net, NETLINK_NFLOG, &cfg);
|
||||
if (!ebtulognl)
|
||||
ret = -ENOMEM;
|
||||
else if ((ret = xt_register_target(&ebt_ulog_tg_reg)) != 0)
|
||||
netlink_kernel_release(ebtulognl);
|
||||
ebt->ebtulognl = netlink_kernel_create(net, NETLINK_NFLOG, &cfg);
|
||||
if (!ebt->ebtulognl)
|
||||
return -ENOMEM;
|
||||
|
||||
if (ret == 0)
|
||||
nf_log_register(NFPROTO_BRIDGE, &ebt_ulog_logger);
|
||||
|
||||
return ret;
|
||||
nf_log_set(net, NFPROTO_BRIDGE, &ebt_ulog_logger);
|
||||
return 0;
|
||||
}
|
||||
|
||||
static void __exit ebt_ulog_fini(void)
|
||||
static void __net_exit ebt_ulog_net_fini(struct net *net)
|
||||
{
|
||||
ebt_ulog_buff_t *ub;
|
||||
int i;
|
||||
struct ebt_ulog_net *ebt = ebt_ulog_pernet(net);
|
||||
|
||||
nf_log_unregister(&ebt_ulog_logger);
|
||||
xt_unregister_target(&ebt_ulog_tg_reg);
|
||||
nf_log_unset(net, &ebt_ulog_logger);
|
||||
for (i = 0; i < EBT_ULOG_MAXNLGROUPS; i++) {
|
||||
ub = &ulog_buffers[i];
|
||||
ebt_ulog_buff_t *ub = &ebt->ulog_buffers[i];
|
||||
del_timer(&ub->timer);
|
||||
|
||||
if (ub->skb) {
|
||||
|
@ -325,7 +334,49 @@ static void __exit ebt_ulog_fini(void)
|
|||
ub->skb = NULL;
|
||||
}
|
||||
}
|
||||
netlink_kernel_release(ebtulognl);
|
||||
netlink_kernel_release(ebt->ebtulognl);
|
||||
}
|
||||
|
||||
static struct pernet_operations ebt_ulog_net_ops = {
|
||||
.init = ebt_ulog_net_init,
|
||||
.exit = ebt_ulog_net_fini,
|
||||
.id = &ebt_ulog_net_id,
|
||||
.size = sizeof(struct ebt_ulog_net),
|
||||
};
|
||||
|
||||
static int __init ebt_ulog_init(void)
|
||||
{
|
||||
int ret;
|
||||
|
||||
if (nlbufsiz >= 128*1024) {
|
||||
pr_warn("Netlink buffer has to be <= 128kB,"
|
||||
"please try a smaller nlbufsiz parameter.\n");
|
||||
return -EINVAL;
|
||||
}
|
||||
|
||||
ret = register_pernet_subsys(&ebt_ulog_net_ops);
|
||||
if (ret)
|
||||
goto out_pernet;
|
||||
|
||||
ret = xt_register_target(&ebt_ulog_tg_reg);
|
||||
if (ret)
|
||||
goto out_target;
|
||||
|
||||
nf_log_register(NFPROTO_BRIDGE, &ebt_ulog_logger);
|
||||
|
||||
return 0;
|
||||
|
||||
out_target:
|
||||
unregister_pernet_subsys(&ebt_ulog_net_ops);
|
||||
out_pernet:
|
||||
return ret;
|
||||
}
|
||||
|
||||
static void __exit ebt_ulog_fini(void)
|
||||
{
|
||||
nf_log_unregister(&ebt_ulog_logger);
|
||||
xt_unregister_target(&ebt_ulog_tg_reg);
|
||||
unregister_pernet_subsys(&ebt_ulog_net_ops);
|
||||
}
|
||||
|
||||
module_init(ebt_ulog_init);
|
||||
|
|
Loading…
Reference in New Issue
Block a user