| From 6e9d0d578fdf90901507dd9f9929d0e6fcdd3211 Mon Sep 17 00:00:00 2001 |
| From: Michael Jeanson <mjeanson@efficios.com> |
| Date: Wed, 26 Jan 2022 14:49:11 -0500 |
| Subject: [PATCH 6/7] fix: net: skb: introduce kfree_skb_reason() (v5.17) |
| |
| See upstream commit : |
| |
| commit c504e5c2f9648a1e5c2be01e8c3f59d394192bd3 |
| Author: Menglong Dong <imagedong@tencent.com> |
| Date: Sun Jan 9 14:36:26 2022 +0800 |
| |
| net: skb: introduce kfree_skb_reason() |
| |
| Introduce the interface kfree_skb_reason(), which is able to pass |
| the reason why the skb is dropped to 'kfree_skb' tracepoint. |
| |
| Add the 'reason' field to 'trace_kfree_skb', therefor user can get |
| more detail information about abnormal skb with 'drop_monitor' or |
| eBPF. |
| |
| All drop reasons are defined in the enum 'skb_drop_reason', and |
| they will be print as string in 'kfree_skb' tracepoint in format |
| of 'reason: XXX'. |
| |
| ( Maybe the reasons should be defined in a uapi header file, so that |
| user space can use them? ) |
| |
| Upstream-Status: Backport [lttng-modules commit 6e9d0d578fdf90901507dd9f9929d0e6fcdd3211] |
| |
| Change-Id: I6766678a288da959498a4736fc3f95bf239c3e94 |
| Signed-off-by: Michael Jeanson <mjeanson@efficios.com> |
| Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com> |
| --- |
| include/instrumentation/events/skb.h | 31 ++++++++++++++++++++++++++++ |
| 1 file changed, 31 insertions(+) |
| |
| diff --git a/include/instrumentation/events/skb.h b/include/instrumentation/events/skb.h |
| index d6579363..c6d7095d 100644 |
| --- a/include/instrumentation/events/skb.h |
| +++ b/include/instrumentation/events/skb.h |
| @@ -13,6 +13,36 @@ |
| /* |
| * Tracepoint for free an sk_buff: |
| */ |
| +#if (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(5,17,0)) |
| +LTTNG_TRACEPOINT_ENUM(skb_drop_reason, |
| + TP_ENUM_VALUES( |
| + ctf_enum_value("NOT_SPECIFIED", SKB_DROP_REASON_NOT_SPECIFIED) |
| + ctf_enum_value("NO_SOCKET", SKB_DROP_REASON_NO_SOCKET) |
| + ctf_enum_value("PKT_TOO_SMALL", SKB_DROP_REASON_PKT_TOO_SMALL) |
| + ctf_enum_value("TCP_CSUM", SKB_DROP_REASON_TCP_CSUM) |
| + ctf_enum_value("TCP_FILTER", SKB_DROP_REASON_TCP_FILTER) |
| + ctf_enum_value("UDP_CSUM", SKB_DROP_REASON_UDP_CSUM) |
| + ctf_enum_value("MAX", SKB_DROP_REASON_MAX) |
| + ) |
| +) |
| + |
| +LTTNG_TRACEPOINT_EVENT_MAP(kfree_skb, |
| + |
| + skb_kfree, |
| + |
| + TP_PROTO(struct sk_buff *skb, void *location, |
| + enum skb_drop_reason reason), |
| + |
| + TP_ARGS(skb, location, reason), |
| + |
| + TP_FIELDS( |
| + ctf_integer_hex(void *, skbaddr, skb) |
| + ctf_integer_hex(void *, location, location) |
| + ctf_integer_network(unsigned short, protocol, skb->protocol) |
| + ctf_enum(skb_drop_reason, uint8_t, reason, reason) |
| + ) |
| +) |
| +#else |
| LTTNG_TRACEPOINT_EVENT_MAP(kfree_skb, |
| |
| skb_kfree, |
| @@ -27,6 +57,7 @@ LTTNG_TRACEPOINT_EVENT_MAP(kfree_skb, |
| ctf_integer_network(unsigned short, protocol, skb->protocol) |
| ) |
| ) |
| +#endif |
| |
| LTTNG_TRACEPOINT_EVENT_MAP(consume_skb, |
| |
| -- |
| 2.19.1 |
| |