[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]
Message-Id: <20220407062052.15907-2-imagedong@tencent.com>
Date: Thu, 7 Apr 2022 14:20:49 +0800
From: menglong8.dong@...il.com
To: dsahern@...nel.org, kuba@...nel.org, pabeni@...hat.com
Cc: rostedt@...dmis.org, mingo@...hat.com, xeb@...l.ru,
davem@...emloft.net, yoshfuji@...ux-ipv6.org,
imagedong@...cent.com, edumazet@...gle.com, kafai@...com,
talalahmad@...gle.com, keescook@...omium.org, alobakin@...me,
flyingpeng@...cent.com, mengensun@...cent.com,
dongli.zhang@...cle.com, linux-kernel@...r.kernel.org,
netdev@...r.kernel.org, benbjiang@...cent.com
Subject: [PATCH RESEND net-next v5 1/4] net: sock: introduce sock_queue_rcv_skb_reason()
From: Menglong Dong <imagedong@...cent.com>
In order to report the reasons of skb drops in 'sock_queue_rcv_skb()',
introduce the function 'sock_queue_rcv_skb_reason()'.
As the return value of 'sock_queue_rcv_skb()' is used as the error code,
we can't make it as drop reason and have to pass extra output argument.
'sock_queue_rcv_skb()' is used in many places, so we can't change it
directly.
Introduce the new function 'sock_queue_rcv_skb_reason()' and make
'sock_queue_rcv_skb()' an inline call to it.
Reviewed-by: Hao Peng <flyingpeng@...cent.com>
Reviewed-by: Jiang Biao <benbjiang@...cent.com>
Signed-off-by: Menglong Dong <imagedong@...cent.com>
---
include/net/sock.h | 9 ++++++++-
net/core/sock.c | 30 ++++++++++++++++++++++++------
2 files changed, 32 insertions(+), 7 deletions(-)
diff --git a/include/net/sock.h b/include/net/sock.h
index c4b91fc19b9c..1a988e605f09 100644
--- a/include/net/sock.h
+++ b/include/net/sock.h
@@ -2392,7 +2392,14 @@ int __sk_queue_drop_skb(struct sock *sk, struct sk_buff_head *sk_queue,
void (*destructor)(struct sock *sk,
struct sk_buff *skb));
int __sock_queue_rcv_skb(struct sock *sk, struct sk_buff *skb);
-int sock_queue_rcv_skb(struct sock *sk, struct sk_buff *skb);
+
+int sock_queue_rcv_skb_reason(struct sock *sk, struct sk_buff *skb,
+ enum skb_drop_reason *reason);
+
+static inline int sock_queue_rcv_skb(struct sock *sk, struct sk_buff *skb)
+{
+ return sock_queue_rcv_skb_reason(sk, skb, NULL);
+}
int sock_queue_err_skb(struct sock *sk, struct sk_buff *skb);
struct sk_buff *sock_dequeue_err_skb(struct sock *sk);
diff --git a/net/core/sock.c b/net/core/sock.c
index 1180a0cb0110..2cae991f817e 100644
--- a/net/core/sock.c
+++ b/net/core/sock.c
@@ -503,17 +503,35 @@ int __sock_queue_rcv_skb(struct sock *sk, struct sk_buff *skb)
}
EXPORT_SYMBOL(__sock_queue_rcv_skb);
-int sock_queue_rcv_skb(struct sock *sk, struct sk_buff *skb)
+int sock_queue_rcv_skb_reason(struct sock *sk, struct sk_buff *skb,
+ enum skb_drop_reason *reason)
{
+ enum skb_drop_reason drop_reason;
int err;
err = sk_filter(sk, skb);
- if (err)
- return err;
-
- return __sock_queue_rcv_skb(sk, skb);
+ if (err) {
+ drop_reason = SKB_DROP_REASON_SOCKET_FILTER;
+ goto out;
+ }
+ err = __sock_queue_rcv_skb(sk, skb);
+ switch (err) {
+ case -ENOMEM:
+ drop_reason = SKB_DROP_REASON_SOCKET_RCVBUFF;
+ break;
+ case -ENOBUFS:
+ drop_reason = SKB_DROP_REASON_PROTO_MEM;
+ break;
+ default:
+ drop_reason = SKB_NOT_DROPPED_YET;
+ break;
+ }
+out:
+ if (reason)
+ *reason = drop_reason;
+ return err;
}
-EXPORT_SYMBOL(sock_queue_rcv_skb);
+EXPORT_SYMBOL(sock_queue_rcv_skb_reason);
int __sk_receive_skb(struct sock *sk, struct sk_buff *skb,
const int nested, unsigned int trim_cap, bool refcounted)
--
2.35.1
Powered by blists - more mailing lists