Patrick Williams | db4c27e | 2022-08-05 08:10:29 -0500 | [diff] [blame^] | 1 | From d8254360c7f2ff9b3f945e9668d89c0b56b9bd91 Mon Sep 17 00:00:00 2001 |
| 2 | From: Mathieu Desnoyers <mathieu.desnoyers@efficios.com> |
| 3 | Date: Fri, 29 Jul 2022 15:37:43 -0400 |
| 4 | Subject: [PATCH] fix: net: skb: introduce kfree_skb_reason() (v5.15.58..v5.16) |
| 5 | |
| 6 | See upstream commit : |
| 7 | |
| 8 | commit c504e5c2f9648a1e5c2be01e8c3f59d394192bd3 |
| 9 | Author: Menglong Dong <imagedong@tencent.com> |
| 10 | Date: Sun Jan 9 14:36:26 2022 +0800 |
| 11 | |
| 12 | net: skb: introduce kfree_skb_reason() |
| 13 | |
| 14 | Introduce the interface kfree_skb_reason(), which is able to pass |
| 15 | the reason why the skb is dropped to 'kfree_skb' tracepoint. |
| 16 | |
| 17 | Add the 'reason' field to 'trace_kfree_skb', therefor user can get |
| 18 | more detail information about abnormal skb with 'drop_monitor' or |
| 19 | eBPF. |
| 20 | |
| 21 | All drop reasons are defined in the enum 'skb_drop_reason', and |
| 22 | they will be print as string in 'kfree_skb' tracepoint in format |
| 23 | of 'reason: XXX'. |
| 24 | |
| 25 | ( Maybe the reasons should be defined in a uapi header file, so that |
| 26 | user space can use them? ) |
| 27 | |
| 28 | Upstream-Status: Backport |
| 29 | |
| 30 | Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com> |
| 31 | Change-Id: Ib3c039207739dad10f097cf76474e0822e351273 |
| 32 | --- |
| 33 | include/instrumentation/events/skb.h | 4 +++- |
| 34 | 1 file changed, 3 insertions(+), 1 deletion(-) |
| 35 | |
| 36 | diff --git a/include/instrumentation/events/skb.h b/include/instrumentation/events/skb.h |
| 37 | index 237e54ad..186732ea 100644 |
| 38 | --- a/include/instrumentation/events/skb.h |
| 39 | +++ b/include/instrumentation/events/skb.h |
| 40 | @@ -13,7 +13,9 @@ |
| 41 | /* |
| 42 | * Tracepoint for free an sk_buff: |
| 43 | */ |
| 44 | -#if (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(5,17,0)) |
| 45 | +#if (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(5,17,0) \ |
| 46 | + || LTTNG_KERNEL_RANGE(5,15,58, 5,16,0)) |
| 47 | + |
| 48 | LTTNG_TRACEPOINT_ENUM(skb_drop_reason, |
| 49 | TP_ENUM_VALUES( |
| 50 | ctf_enum_value("NOT_SPECIFIED", SKB_DROP_REASON_NOT_SPECIFIED) |
| 51 | -- |
| 52 | 2.17.1 |
| 53 | |