diff options
| author | Menglong Dong <imagedong@tencent.com> | 2022-04-07 14:20:49 +0800 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2022-04-11 10:38:37 +0100 |
| commit | c1b8a56755ee121f9fa374de9eec36c91a7da25f (patch) | |
| tree | 987b15d7503971ee4c415d23967212a641924883 /net/core/sock.c | |
| parent | 516a2f1f6f3ce1a87931579cc21de6e7e33440bd (diff) | |
net: sock: introduce sock_queue_rcv_skb_reason()
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@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>
Diffstat (limited to 'net/core/sock.c')
| -rw-r--r-- | net/core/sock.c | 30 |
1 files changed, 24 insertions, 6 deletions
diff --git a/net/core/sock.c b/net/core/sock.c index 7000403eaeb2..05e0cfa064b6 100644 --- a/net/core/sock.c +++ b/net/core/sock.c @@ -505,17 +505,35 @@ 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) |