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netfilter: nf_log: prepare net namespace support for loggers

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This patch adds netns support to nf_log and it prepares netns
support for existing loggers. It is composed of four major
changes.

1) nf_log_register has been split to two functions: nf_log_register
   and nf_log_set. The new nf_log_register is used to globally
   register the nf_logger and nf_log_set is used for enabling
   pernet support from nf_loggers.

   Per netns is not yet complete after this patch, it comes in
   separate follow up patches.

2) Add net as a parameter of nf_log_bind_pf. Per netns is not
   yet complete after this patch, it only allows to bind the
   nf_logger to the protocol family from init_net and it skips
   other cases.

3) Adapt all nf_log_packet callers to pass netns as parameter.
   After this patch, this function only works for init_net.

4) Make the sysctl net/netfilter/nf_log pernet.

Signed-off-by: Gao feng <[email protected]>
Signed-off-by: Pablo Neira Ayuso <[email protected]>
This commit is contained in:
Gao feng 2013-03-24 23:50:40 +00:00 • committed by Pablo Neira Ayuso
commit 30e0c6a6be
16 changed files with 233 additions and 100 deletions
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7
net/bridge/netfilter/ebt_log.c
View file

@ -176,17 +176,18 @@ ebt_log_tg(struct sk_buff *skb, const struct xt_action_param *par)
{
const struct ebt_log_info *info = par->targinfo;
struct nf_loginfo li;
struct net *net = dev_net(par->in ? par->in : par->out);
li.type = NF_LOG_TYPE_LOG;
li.u.log.level = info->loglevel;
li.u.log.logflags = info->bitmask;
if (info->bitmask & EBT_LOG_NFLOG)
nf_log_packet(NFPROTO_BRIDGE, par->hooknum, skb, par->in,
par->out, &li, "%s", info->prefix);
nf_log_packet(net, NFPROTO_BRIDGE, par->hooknum, skb,
par->in, par->out, &li, "%s", info->prefix);
else
ebt_log_packet(NFPROTO_BRIDGE, par->hooknum, skb, par->in,
par->out, &li, info->prefix);
par->out, &li, info->prefix);
return EBT_CONTINUE;
}

5
net/bridge/netfilter/ebt_nflog.c
View file

@ -24,14 +24,15 @@ ebt_nflog_tg(struct sk_buff *skb, const struct xt_action_param *par)
{
const struct ebt_nflog_info *info = par->targinfo;
struct nf_loginfo li;
struct net *net = dev_net(par->in ? par->in : par->out);
li.type = NF_LOG_TYPE_ULOG;
li.u.ulog.copy_len = info->len;
li.u.ulog.group = info->group;
li.u.ulog.qthreshold = info->threshold;
nf_log_packet(PF_BRIDGE, par->hooknum, skb, par->in, par->out,
&li, "%s", info->prefix);
nf_log_packet(net, PF_BRIDGE, par->hooknum, skb, par->in,
par->out, &li, "%s", info->prefix);
return EBT_CONTINUE;
}