From: Jason Xing <kernelx...@tencent.com>
Reuse the dropreason logic to show the exact reason of tcp reset,
so we can finally display the corresponding item in enum sk_reset_reason
instead of reinventing new reset reasons. This patch replaces all
the prior NOT_SPECIFIED reasons.
Signed-off-by: Jason Xing <kernelx...@tencent.com>
---
include/net/rstreason.h | 15 +++++++++++++++
net/ipv4/tcp_ipv4.c | 11 +++++++----
net/ipv6/tcp_ipv6.c | 11 +++++++----
3 files changed, 29 insertions(+), 8 deletions(-)
diff --git a/include/net/rstreason.h b/include/net/rstreason.h
index bc53b5a24505..df3b6ac0c9b3 100644
--- a/include/net/rstreason.h
+++ b/include/net/rstreason.h
@@ -103,4 +103,19 @@ enum sk_rst_reason {
*/
SK_RST_REASON_MAX,
};
+
+/* Convert skb drop reasons to enum sk_rst_reason type */
+static inline enum sk_rst_reason
+sk_rst_convert_drop_reason(enum skb_drop_reason reason)
+{
+ switch (reason) {
+ case SKB_DROP_REASON_NOT_SPECIFIED:
+ return SK_RST_REASON_NOT_SPECIFIED;
+ case SKB_DROP_REASON_NO_SOCKET:
+ return SK_RST_REASON_NO_SOCKET;
+ default:
+ /* If we don't have our own corresponding reason */
+ return SK_RST_REASON_NOT_SPECIFIED;
+ }
+}
#endif
diff --git a/net/ipv4/tcp_ipv4.c b/net/ipv4/tcp_ipv4.c
index 418d11902fa7..6bd3a0fb9439 100644
--- a/net/ipv4/tcp_ipv4.c
+++ b/net/ipv4/tcp_ipv4.c
@@ -1936,7 +1936,7 @@ int tcp_v4_do_rcv(struct sock *sk, struct sk_buff *skb)
return 0;
reset:
- tcp_v4_send_reset(rsk, skb, SK_RST_REASON_NOT_SPECIFIED);
+ tcp_v4_send_reset(rsk, skb, sk_rst_convert_drop_reason(reason));
discard:
kfree_skb_reason(skb, reason);
/* Be careful here. If this function gets more complicated and
@@ -2278,7 +2278,10 @@ int tcp_v4_rcv(struct sk_buff *skb)
} else {
drop_reason = tcp_child_process(sk, nsk, skb);
if (drop_reason) {
- tcp_v4_send_reset(nsk, skb,
SK_RST_REASON_NOT_SPECIFIED);
+ enum sk_rst_reason rst_reason;
+
+ rst_reason =
sk_rst_convert_drop_reason(drop_reason);
+ tcp_v4_send_reset(nsk, skb, rst_reason);
goto discard_and_relse;
}
sock_put(sk);
@@ -2357,7 +2360,7 @@ int tcp_v4_rcv(struct sk_buff *skb)
bad_packet:
__TCP_INC_STATS(net, TCP_MIB_INERRS);
} else {
- tcp_v4_send_reset(NULL, skb, SK_RST_REASON_NOT_SPECIFIED);
+ tcp_v4_send_reset(NULL, skb,
sk_rst_convert_drop_reason(drop_reason));
}
discard_it:
@@ -2409,7 +2412,7 @@ int tcp_v4_rcv(struct sk_buff *skb)
tcp_v4_timewait_ack(sk, skb);
break;
case TCP_TW_RST:
- tcp_v4_send_reset(sk, skb, SK_RST_REASON_NOT_SPECIFIED);
+ tcp_v4_send_reset(sk, skb,
sk_rst_convert_drop_reason(drop_reason));
inet_twsk_deschedule_put(inet_twsk(sk));
goto discard_it;
case TCP_TW_SUCCESS:;
diff --git a/net/ipv6/tcp_ipv6.c b/net/ipv6/tcp_ipv6.c
index 017f6293b5f4..317d7a6e6b01 100644
--- a/net/ipv6/tcp_ipv6.c
+++ b/net/ipv6/tcp_ipv6.c
@@ -1680,7 +1680,7 @@ int tcp_v6_do_rcv(struct sock *sk, struct sk_buff *skb)
return 0;
reset:
- tcp_v6_send_reset(sk, skb, SK_RST_REASON_NOT_SPECIFIED);
+ tcp_v6_send_reset(sk, skb, sk_rst_convert_drop_reason(reason));
discard:
if (opt_skb)
__kfree_skb(opt_skb);
@@ -1865,7 +1865,10 @@ INDIRECT_CALLABLE_SCOPE int tcp_v6_rcv(struct sk_buff
*skb)
} else {
drop_reason = tcp_child_process(sk, nsk, skb);
if (drop_reason) {
- tcp_v6_send_reset(nsk, skb,
SK_RST_REASON_NOT_SPECIFIED);
+ enum sk_rst_reason rst_reason;
+
+ rst_reason =
sk_rst_convert_drop_reason(drop_reason);
+ tcp_v6_send_reset(nsk, skb, rst_reason);
goto discard_and_relse;
}
sock_put(sk);
@@ -1942,7 +1945,7 @@ INDIRECT_CALLABLE_SCOPE int tcp_v6_rcv(struct sk_buff
*skb)
bad_packet:
__TCP_INC_STATS(net, TCP_MIB_INERRS);
} else {
- tcp_v6_send_reset(NULL, skb, SK_RST_REASON_NOT_SPECIFIED);
+ tcp_v6_send_reset(NULL, skb,
sk_rst_convert_drop_reason(drop_reason));
}
discard_it:
@@ -1998,7 +2001,7 @@ INDIRECT_CALLABLE_SCOPE int tcp_v6_rcv(struct sk_buff
*skb)
tcp_v6_timewait_ack(sk, skb);
break;
case TCP_TW_RST:
- tcp_v6_send_reset(sk, skb, SK_RST_REASON_NOT_SPECIFIED);
+ tcp_v6_send_reset(sk, skb,
sk_rst_convert_drop_reason(drop_reason));
inet_twsk_deschedule_put(inet_twsk(sk));
goto discard_it;
case TCP_TW_SUCCESS:
--
2.37.3
