| From d8254360c7f2ff9b3f945e9668d89c0b56b9bd91 Mon Sep 17 00:00:00 2001 |
| From: Mathieu Desnoyers <mathieu.desnoyers@efficios.com> |
| Date: Fri, 29 Jul 2022 15:37:43 -0400 |
| Subject: [PATCH] fix: net: skb: introduce kfree_skb_reason() (v5.15.58..v5.16) |
| |
| 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 |
| |
| Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com> |
| Change-Id: Ib3c039207739dad10f097cf76474e0822e351273 |
| --- |
| include/instrumentation/events/skb.h | 4 +++- |
| 1 file changed, 3 insertions(+), 1 deletion(-) |
| |
| diff --git a/include/instrumentation/events/skb.h b/include/instrumentation/events/skb.h |
| index 237e54ad..186732ea 100644 |
| --- a/include/instrumentation/events/skb.h |
| +++ b/include/instrumentation/events/skb.h |
| @@ -13,7 +13,9 @@ |
| /* |
| * Tracepoint for free an sk_buff: |
| */ |
| -#if (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(5,17,0)) |
| +#if (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(5,17,0) \ |
| + || LTTNG_KERNEL_RANGE(5,15,58, 5,16,0)) |
| + |
| LTTNG_TRACEPOINT_ENUM(skb_drop_reason, |
| TP_ENUM_VALUES( |
| ctf_enum_value("NOT_SPECIFIED", SKB_DROP_REASON_NOT_SPECIFIED) |
| -- |
| 2.17.1 |
| |