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net: icmp: introduce __ping_queue_rcv_skb() to report drop reasons 

In order to avoid to change the return value of ping_queue_rcv_skb(),
introduce the function __ping_queue_rcv_skb(), which is able to report
the reasons of skb drop as its return value, as Paolo suggested.

Meanwhile, make ping_queue_rcv_skb() a simple call to
__ping_queue_rcv_skb().

The kfree_skb() and sock_queue_rcv_skb() used in ping_queue_rcv_skb()
are replaced with kfree_skb_reason() and sock_queue_rcv_skb_reason()
now.

Reviewed-by: Hao Peng <flyingpeng@tencent.com>
Reviewed-by: Jiang Biao <benbjiang@tencent.com>
Signed-off-by: Menglong Dong <imagedong@tencent.com>
Reviewed-by: David Ahern <dsahern@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Menglong Dong 2022-04-07 14:20:51 +08:00 committed by David S. Miller
parent 9f8ed577c2
commit 41a95a00eb
1 changed files with 13 additions and 5 deletions
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18
net/ipv4/ping.c
View File

@ -935,16 +935,24 @@ out:
}
EXPORT_SYMBOL_GPL(ping_recvmsg);
int ping_queue_rcv_skb(struct sock *sk, struct sk_buff *skb)
static enum skb_drop_reason __ping_queue_rcv_skb(struct sock *sk,
struct sk_buff *skb)
{
enum skb_drop_reason reason;
pr_debug("ping_queue_rcv_skb(sk=%p,sk->num=%d,skb=%p)\n",
inet_sk(sk), inet_sk(sk)->inet_num, skb);
if (sock_queue_rcv_skb(sk, skb) < 0) {
kfree_skb(skb);
if (sock_queue_rcv_skb_reason(sk, skb, &reason) < 0) {
kfree_skb_reason(skb, reason);
pr_debug("ping_queue_rcv_skb -> failed\n");
return -1;
return reason;
}
return 0;
return SKB_NOT_DROPPED_YET;
}
int ping_queue_rcv_skb(struct sock *sk, struct sk_buff *skb)
{
return __ping_queue_rcv_skb(sk, skb) ? -1 : 0;
}
EXPORT_SYMBOL_GPL(ping_queue_rcv_skb);