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[RTNETLINK]: Use generic netlink receive queue processor

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Signed-off-by: Thomas Graf <tgraf@suug.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Thomas Graf 2005-11-10 02:25:55 +01:00 committed by Thomas Graf
parent 88fc2c8431
commit 9ac4a16983
1 changed files with 5 additions and 70 deletions
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75
net/core/rtnetlink.c
View file

@ -49,6 +49,7 @@
#include <net/udp.h>
#include <net/sock.h>
#include <net/pkt_sched.h>
#include <net/netlink.h>
DECLARE_MUTEX(rtnl_sem);
@ -519,8 +520,6 @@ rtnetlink_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh, int *errp)
}
if (kind == 2 && nlh->nlmsg_flags&NLM_F_DUMP) {
u32 rlen;
if (link->dumpit == NULL)
link = &(rtnetlink_links[PF_UNSPEC][type]);
@ -531,10 +530,8 @@ rtnetlink_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh, int *errp)
link->dumpit, NULL)) != 0) {
return -1;
}
rlen = NLMSG_ALIGN(nlh->nlmsg_len);
if (rlen > skb->len)
rlen = skb->len;
skb_pull(skb, rlen);
netlink_queue_skip(nlh, skb);
return -1;
}
@ -573,75 +570,13 @@ rtnetlink_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh, int *errp)
return -1;
}
/*
* Process one packet of messages.
* Malformed skbs with wrong lengths of messages are discarded silently.
*/
static inline int rtnetlink_rcv_skb(struct sk_buff *skb)
{
int err;
struct nlmsghdr * nlh;
while (skb->len >= NLMSG_SPACE(0)) {
u32 rlen;
nlh = (struct nlmsghdr *)skb->data;
if (nlh->nlmsg_len < sizeof(*nlh) || skb->len < nlh->nlmsg_len)
return 0;
rlen = NLMSG_ALIGN(nlh->nlmsg_len);
if (rlen > skb->len)
rlen = skb->len;
if (rtnetlink_rcv_msg(skb, nlh, &err)) {
/* Not error, but we must interrupt processing here:
* Note, that in this case we do not pull message
* from skb, it will be processed later.
*/
if (err == 0)
return -1;
netlink_ack(skb, nlh, err);
} else if (nlh->nlmsg_flags&NLM_F_ACK)
netlink_ack(skb, nlh, 0);
skb_pull(skb, rlen);
}
return 0;
}
/*
* rtnetlink input queue processing routine:
* - process as much as there was in the queue upon entry.
* - feed skbs to rtnetlink_rcv_skb, until it refuse a message,
* that will occur, when a dump started.
*/
static void rtnetlink_rcv(struct sock *sk, int len)
{
unsigned int qlen = skb_queue_len(&sk->sk_receive_queue);
unsigned int qlen = 0;
do {
struct sk_buff *skb;
rtnl_lock();
if (qlen > skb_queue_len(&sk->sk_receive_queue))
qlen = skb_queue_len(&sk->sk_receive_queue);
for (; qlen; qlen--) {
skb = skb_dequeue(&sk->sk_receive_queue);
if (rtnetlink_rcv_skb(skb)) {
if (skb->len)
skb_queue_head(&sk->sk_receive_queue,
skb);
else {
kfree_skb(skb);
qlen--;
}
break;
}
kfree_skb(skb);
}
netlink_run_queue(sk, &qlen, &rtnetlink_rcv_msg);
up(&rtnl_sem);
netdev_run_todo();