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| author | Menglong Dong <imagedong@tencent.com> | 2022-02-05 10:47:35 +0300 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2022-02-07 14:18:49 +0300 |
| commit | 33cba42985c8144eef78d618fc1e51aaa074b169 (patch) | |
| tree | 80cafa612b8048e554cce205ab3a378c4e833af7 /net | |
| parent | 2df3041ba3be950376e8c25a8f6da22f7fcc765c (diff) | |
| download | linux-33cba42985c8144eef78d618fc1e51aaa074b169.tar.xz | |
net: ipv4: use kfree_skb_reason() in ip_rcv_core()
Replace kfree_skb() with kfree_skb_reason() in ip_rcv_core(). Three new
drop reasons are introduced:
SKB_DROP_REASON_OTHERHOST
SKB_DROP_REASON_IP_CSUM
SKB_DROP_REASON_IP_INHDR
Signed-off-by: Menglong Dong <imagedong@tencent.com>
Reviewed-by: David Ahern <dsahern@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net')
| -rw-r--r-- | net/ipv4/ip_input.c | 12 |
1 files changed, 10 insertions, 2 deletions
diff --git a/net/ipv4/ip_input.c b/net/ipv4/ip_input.c index 3a025c011971..7be18de32e16 100644 --- a/net/ipv4/ip_input.c +++ b/net/ipv4/ip_input.c @@ -436,13 +436,16 @@ static int ip_rcv_finish(struct net *net, struct sock *sk, struct sk_buff *skb) static struct sk_buff *ip_rcv_core(struct sk_buff *skb, struct net *net) { const struct iphdr *iph; + int drop_reason; u32 len; /* When the interface is in promisc. mode, drop all the crap * that it receives, do not try to analyse it. */ - if (skb->pkt_type == PACKET_OTHERHOST) + if (skb->pkt_type == PACKET_OTHERHOST) { + drop_reason = SKB_DROP_REASON_OTHERHOST; goto drop; + } __IP_UPD_PO_STATS(net, IPSTATS_MIB_IN, skb->len); @@ -452,6 +455,7 @@ static struct sk_buff *ip_rcv_core(struct sk_buff *skb, struct net *net) goto out; } + drop_reason = SKB_DROP_REASON_NOT_SPECIFIED; if (!pskb_may_pull(skb, sizeof(struct iphdr))) goto inhdr_error; @@ -488,6 +492,7 @@ static struct sk_buff *ip_rcv_core(struct sk_buff *skb, struct net *net) len = ntohs(iph->tot_len); if (skb->len < len) { + drop_reason = SKB_DROP_REASON_PKT_TOO_SMALL; __IP_INC_STATS(net, IPSTATS_MIB_INTRUNCATEDPKTS); goto drop; } else if (len < (iph->ihl*4)) @@ -516,11 +521,14 @@ static struct sk_buff *ip_rcv_core(struct sk_buff *skb, struct net *net) return skb; csum_error: + drop_reason = SKB_DROP_REASON_IP_CSUM; __IP_INC_STATS(net, IPSTATS_MIB_CSUMERRORS); inhdr_error: + if (drop_reason == SKB_DROP_REASON_NOT_SPECIFIED) + drop_reason = SKB_DROP_REASON_IP_INHDR; __IP_INC_STATS(net, IPSTATS_MIB_INHDRERRORS); drop: - kfree_skb(skb); + kfree_skb_reason(skb, drop_reason); out: return NULL; } |