diff options
| author | Donald Hunter <donald.hunter@redhat.com> | 2022-09-26 13:03:50 +0100 |
|---|---|---|
| committer | Jakub Kicinski <kuba@kernel.org> | 2022-09-27 18:05:03 -0700 |
| commit | 0d92efdee9152e400aa973229861c3cb84069a98 (patch) | |
| tree | bfdfb3d6036d9d1287556a4037902293e7462c03 /net/ipv6 | |
| parent | ab7ea1e73532247217d3e450015dd7ece966dc0e (diff) | |
Add skb drop reasons to IPv6 UDP receive path
Enumerate the skb drop reasons in the receive path for IPv6 UDP packets.
Signed-off-by: Donald Hunter <donald.hunter@redhat.com>
Link: https://lore.kernel.org/r/20220926120350.14928-1-donald.hunter@gmail.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Diffstat (limited to 'net/ipv6')
| -rw-r--r-- | net/ipv6/udp.c | 22 |
1 files changed, 16 insertions, 6 deletions
diff --git a/net/ipv6/udp.c b/net/ipv6/udp.c index 3366d6a77ff2..91e795bb9ade 100644 --- a/net/ipv6/udp.c +++ b/net/ipv6/udp.c @@ -650,16 +650,20 @@ static int __udpv6_queue_rcv_skb(struct sock *sk, struct sk_buff *skb) rc = __udp_enqueue_schedule_skb(sk, skb); if (rc < 0) { int is_udplite = IS_UDPLITE(sk); + enum skb_drop_reason drop_reason; /* Note that an ENOMEM error is charged twice */ - if (rc == -ENOMEM) + if (rc == -ENOMEM) { UDP6_INC_STATS(sock_net(sk), UDP_MIB_RCVBUFERRORS, is_udplite); - else + drop_reason = SKB_DROP_REASON_SOCKET_RCVBUFF; + } else { UDP6_INC_STATS(sock_net(sk), UDP_MIB_MEMERRORS, is_udplite); + drop_reason = SKB_DROP_REASON_PROTO_MEM; + } UDP6_INC_STATS(sock_net(sk), UDP_MIB_INERRORS, is_udplite); - kfree_skb(skb); + kfree_skb_reason(skb, drop_reason); return -1; } @@ -675,11 +679,14 @@ static __inline__ int udpv6_err(struct sk_buff *skb, static int udpv6_queue_rcv_one_skb(struct sock *sk, struct sk_buff *skb) { + enum skb_drop_reason drop_reason = SKB_DROP_REASON_NOT_SPECIFIED; struct udp_sock *up = udp_sk(sk); int is_udplite = IS_UDPLITE(sk); - if (!xfrm6_policy_check(sk, XFRM_POLICY_IN, skb)) + if (!xfrm6_policy_check(sk, XFRM_POLICY_IN, skb)) { + drop_reason = SKB_DROP_REASON_XFRM_POLICY; goto drop; + } if (static_branch_unlikely(&udpv6_encap_needed_key) && up->encap_type) { int (*encap_rcv)(struct sock *sk, struct sk_buff *skb); @@ -738,8 +745,10 @@ static int udpv6_queue_rcv_one_skb(struct sock *sk, struct sk_buff *skb) udp_lib_checksum_complete(skb)) goto csum_error; - if (sk_filter_trim_cap(sk, skb, sizeof(struct udphdr))) + if (sk_filter_trim_cap(sk, skb, sizeof(struct udphdr))) { + drop_reason = SKB_DROP_REASON_SOCKET_FILTER; goto drop; + } udp_csum_pull_header(skb); @@ -748,11 +757,12 @@ static int udpv6_queue_rcv_one_skb(struct sock *sk, struct sk_buff *skb) return __udpv6_queue_rcv_skb(sk, skb); csum_error: + drop_reason = SKB_DROP_REASON_UDP_CSUM; __UDP6_INC_STATS(sock_net(sk), UDP_MIB_CSUMERRORS, is_udplite); drop: __UDP6_INC_STATS(sock_net(sk), UDP_MIB_INERRORS, is_udplite); atomic_inc(&sk->sk_drops); - kfree_skb(skb); + kfree_skb_reason(skb, drop_reason); return -1; } |