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nfnetlink: add support for memory mapped netlink

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Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Patrick McHardy 2013-04-17 06:47:09 +00:00 committed by David S. Miller
parent ec464e5dc5
commit 3ab1f683bf
4 changed files with 17 additions and 5 deletions
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2
include/linux/netfilter/nfnetlink.h
View File

@ -29,6 +29,8 @@ extern int nfnetlink_subsys_register(const struct nfnetlink_subsystem *n);
extern int nfnetlink_subsys_unregister(const struct nfnetlink_subsystem *n);
extern int nfnetlink_has_listeners(struct net *net, unsigned int group);
extern struct sk_buff *nfnetlink_alloc_skb(struct net *net, unsigned int size,
u32 dst_portid, gfp_t gfp_mask);
extern int nfnetlink_send(struct sk_buff *skb, struct net *net, u32 portid,
unsigned int group, int echo, gfp_t flags);
extern int nfnetlink_set_err(struct net *net, u32 portid, u32 group, int error);

7
net/netfilter/nfnetlink.c
View File

@ -112,6 +112,13 @@ int nfnetlink_has_listeners(struct net *net, unsigned int group)
}
EXPORT_SYMBOL_GPL(nfnetlink_has_listeners);
struct sk_buff *nfnetlink_alloc_skb(struct net *net, unsigned int size,
u32 dst_portid, gfp_t gfp_mask)
{
return netlink_alloc_skb(net->nfnl, size, dst_portid, gfp_mask);
}
EXPORT_SYMBOL_GPL(nfnetlink_alloc_skb);
int nfnetlink_send(struct sk_buff *skb, struct net *net, u32 portid,
unsigned int group, int echo, gfp_t flags)
{

10
net/netfilter/nfnetlink_log.c
View File

@ -318,7 +318,7 @@ nfulnl_set_flags(struct nfulnl_instance *inst, u_int16_t flags)
}
static struct sk_buff *
nfulnl_alloc_skb(unsigned int inst_size, unsigned int pkt_size)
nfulnl_alloc_skb(u32 peer_portid, unsigned int inst_size, unsigned int pkt_size)
{
struct sk_buff *skb;
unsigned int n;
@ -327,13 +327,14 @@ nfulnl_alloc_skb(unsigned int inst_size, unsigned int pkt_size)
* message. WARNING: has to be <= 128k due to slab restrictions */
n = max(inst_size, pkt_size);
skb = alloc_skb(n, GFP_ATOMIC);
skb = nfnetlink_alloc_skb(&init_net, n, peer_portid, GFP_ATOMIC);
if (!skb) {
if (n > pkt_size) {
/* try to allocate only as much as we need for current
* packet */
skb = alloc_skb(pkt_size, GFP_ATOMIC);
skb = nfnetlink_alloc_skb(&init_net, pkt_size,
peer_portid, GFP_ATOMIC);
if (!skb)
pr_err("nfnetlink_log: can't even alloc %u bytes\n",
pkt_size);
@ -696,7 +697,8 @@ nfulnl_log_packet(u_int8_t pf,
}
if (!inst->skb) {
inst->skb = nfulnl_alloc_skb(inst->nlbufsiz, size);
inst->skb = nfulnl_alloc_skb(inst->peer_portid, inst->nlbufsiz,
size);
if (!inst->skb)
goto alloc_failure;
}

3
net/netfilter/nfnetlink_queue_core.c
View File

@ -339,7 +339,8 @@ nfqnl_build_packet_message(struct nfqnl_instance *queue,
if (queue->flags & NFQA_CFG_F_CONNTRACK)
ct = nfqnl_ct_get(entskb, &size, &ctinfo);
skb = alloc_skb(size, GFP_ATOMIC);
skb = nfnetlink_alloc_skb(&init_net, size, queue->peer_portid,
GFP_ATOMIC);
if (!skb)
return NULL;