From: menglong8.dong@gmail.com
To: dsahern@kernel.org, kuba@kernel.org
Cc: edumazet@google.com, davem@davemloft.net, rostedt@goodmis.org,
mingo@redhat.com, yoshfuji@linux-ipv6.org, ast@kernel.org,
daniel@iogearbox.net, hawk@kernel.org, john.fastabend@gmail.com,
imagedong@tencent.com, talalahmad@google.com,
keescook@chromium.org, ilias.apalodimas@linaro.org,
alobakin@pm.me, memxor@gmail.com, atenart@kernel.org,
bigeasy@linutronix.de, pabeni@redhat.com, linyunsheng@huawei.com,
arnd@arndb.de, yajun.deng@linux.dev, roopa@nvidia.com,
willemb@google.com, vvs@virtuozzo.com, cong.wang@bytedance.com,
luiz.von.dentz@intel.com, linux-kernel@vger.kernel.org,
netdev@vger.kernel.org, bpf@vger.kernel.org,
flyingpeng@tencent.com
Subject: [PATCH net-next 11/19] net: neigh: use kfree_skb_reason() for __neigh_event_send()
Date: Tue, 15 Feb 2022 19:28:04 +0800 [thread overview]
Message-ID: <20220215112812.2093852-12-imagedong@tencent.com> (raw)
In-Reply-To: <20220215112812.2093852-1-imagedong@tencent.com>
From: Menglong Dong <imagedong@tencent.com>
Replace kfree_skb() used in __neigh_event_send() with
kfree_skb_reason(). Following drop reasons are added:
SKB_DROP_REASON_NEIGH_FAILED
SKB_DROP_REASON_NEIGH_QUEUEFULL
The two reasons above should be the hot path that skb drops in neighbour
layer.
Signed-off-by: Menglong Dong <imagedong@tencent.com>
---
include/linux/skbuff.h | 9 +++++++++
include/trace/events/skb.h | 2 ++
net/core/neighbour.c | 4 ++--
3 files changed, 13 insertions(+), 2 deletions(-)
diff --git a/include/linux/skbuff.h b/include/linux/skbuff.h
index c7394b4790a0..136af29be256 100644
--- a/include/linux/skbuff.h
+++ b/include/linux/skbuff.h
@@ -387,6 +387,15 @@ enum skb_drop_reason {
* see the doc for disable_ipv6
* in ip-sysctl.rst for detail
*/
+ SKB_DROP_REASON_NEIGH_FAILED, /* dropped as the state of
+ * neighbour is NUD_FAILED
+ */
+ SKB_DROP_REASON_NEIGH_QUEUEFULL, /* the skbs that waiting
+ * for sending on the queue
+ * of neigh->arp_queue is
+ * full, and the skbs on the
+ * tail will be dropped
+ */
SKB_DROP_REASON_MAX,
};
diff --git a/include/trace/events/skb.h b/include/trace/events/skb.h
index 47dedef7b6b8..dd06366ded4a 100644
--- a/include/trace/events/skb.h
+++ b/include/trace/events/skb.h
@@ -41,6 +41,8 @@
EM(SKB_DROP_REASON_BPF_CGROUP_EGRESS, \
BPF_CGROUP_EGRESS) \
EM(SKB_DROP_REASON_IPV6DSIABLED, IPV6DSIABLED) \
+ EM(SKB_DROP_REASON_NEIGH_FAILED, NEIGH_FAILED) \
+ EM(SKB_DROP_REASON_NEIGH_QUEUEFULL, NEIGH_QUEUEFULL) \
EMe(SKB_DROP_REASON_MAX, MAX)
#undef EM
diff --git a/net/core/neighbour.c b/net/core/neighbour.c
index ec0bf737b076..c353834e8fa9 100644
--- a/net/core/neighbour.c
+++ b/net/core/neighbour.c
@@ -1171,7 +1171,7 @@ int __neigh_event_send(struct neighbour *neigh, struct sk_buff *skb,
neigh->updated = jiffies;
write_unlock_bh(&neigh->lock);
- kfree_skb(skb);
+ kfree_skb_reason(skb, SKB_DROP_REASON_NEIGH_FAILED);
return 1;
}
} else if (neigh->nud_state & NUD_STALE) {
@@ -1193,7 +1193,7 @@ int __neigh_event_send(struct neighbour *neigh, struct sk_buff *skb,
if (!buff)
break;
neigh->arp_queue_len_bytes -= buff->truesize;
- kfree_skb(buff);
+ kfree_skb_reason(buff, SKB_DROP_REASON_NEIGH_QUEUEFULL);
NEIGH_CACHE_STAT_INC(neigh->tbl, unres_discards);
}
skb_dst_force(skb);
--
2.34.1
next prev parent reply other threads:[~2022-02-15 11:32 UTC|newest]
Thread overview: 27+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-02-15 11:27 [PATCH net-next 00/19] net: add skb drop reasons for TCP, IP, dev and neigh menglong8.dong
2022-02-15 11:27 ` [PATCH net-next 01/19] net: tcp: introduce tcp_drop_reason() menglong8.dong
2022-02-15 17:34 ` Eric Dumazet
2022-02-15 18:47 ` David Ahern
2022-02-16 2:38 ` Menglong Dong
2022-02-16 2:31 ` Menglong Dong
2022-02-15 11:27 ` [PATCH net-next 02/19] net: tcp: add skb drop reasons to tcp_v4_rcv() menglong8.dong
2022-02-15 11:27 ` [PATCH net-next 03/19] net: tcp: use kfree_skb_reason() for tcp_v6_rcv() menglong8.dong
2022-02-15 11:27 ` [PATCH net-next 04/19] net: tcp: add skb drop reasons to tcp_v{4,6}_inbound_md5_hash() menglong8.dong
2022-02-15 11:27 ` [PATCH net-next 05/19] net: tcp: add skb drop reasons to tcp_add_backlog() menglong8.dong
2022-02-15 11:27 ` [PATCH net-next 06/19] net: tcp: use kfree_skb_reason() for tcp_v{4,6}_do_rcv() menglong8.dong
2022-02-15 11:28 ` [PATCH net-next 07/19] net: tcp: use tcp_drop_reason() for tcp_rcv_established() menglong8.dong
2022-02-15 11:28 ` [PATCH net-next 08/19] net: tcp: use tcp_drop_reason() for tcp_data_queue() menglong8.dong
2022-02-15 11:28 ` [PATCH net-next 09/19] net: tcp: use tcp_drop_reason() for tcp_data_queue_ofo() menglong8.dong
2022-02-15 11:28 ` [PATCH net-next 10/19] net: ip: add skb drop reasons during ip outputting menglong8.dong
2022-02-15 11:28 ` menglong8.dong [this message]
2022-02-15 11:28 ` [PATCH net-next 12/19] net: neigh: add skb drop reasons to arp_error_report() menglong8.dong
2022-02-15 11:28 ` [PATCH net-next 13/19] net: dev: use kfree_skb_reason() for sch_handle_egress() menglong8.dong
2022-02-15 11:28 ` [PATCH net-next 14/19] net: skb: introduce the function kfree_skb_list_reason() menglong8.dong
2022-02-15 11:28 ` [PATCH net-next 15/19] net: dev: add skb drop reasons to __dev_xmit_skb() menglong8.dong
2022-02-15 11:28 ` [PATCH net-next 16/19] net: dev: use kfree_skb_reason() for enqueue_to_backlog() menglong8.dong
2022-02-15 11:28 ` [PATCH net-next 17/19] net: dev: use kfree_skb_reason() for do_xdp_generic() menglong8.dong
2022-02-15 11:28 ` [PATCH net-next 18/19] net: dev: use kfree_skb_reason() for sch_handle_ingress() menglong8.dong
2022-02-15 11:28 ` [PATCH net-next 19/19] net: dev: use kfree_skb_reason() for __netif_receive_skb_core() menglong8.dong
2022-02-15 16:04 ` [PATCH net-next 00/19] net: add skb drop reasons for TCP, IP, dev and neigh Jakub Kicinski
2022-02-15 16:09 ` David Ahern
2022-02-16 1:55 ` Menglong Dong
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