2 files changed, 54 insertions, 0 deletions

diff --git a/meta/recipes-kernel/lttng/lttng-modules/0001-fix-net-skb-introduce-kfree_skb_reason-v5.15.58.v5.1.patch b/meta/recipes-kernel/lttng/lttng-modules/0001-fix-net-skb-introduce-kfree_skb_reason-v5.15.58.v5.1.patch
new file mode 100644
index 0000000000..ca6abea9c0
--- /dev/null
+++ b/meta/recipes-kernel/lttng/lttng-modules/0001-fix-net-skb-introduce-kfree_skb_reason-v5.15.58.v5.1.patch
@@ -0,0 +1,53 @@
+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
+
diff --git a/meta/recipes-kernel/lttng/lttng-modules_2.13.4.bb b/meta/recipes-kernel/lttng/lttng-modules_2.13.4.bb
index 90d48e5867..bee2204b42 100644
--- a/meta/recipes-kernel/lttng/lttng-modules_2.13.4.bb
+++ b/meta/recipes-kernel/lttng/lttng-modules_2.13.4.bb
@@ -11,6 +11,7 @@ include lttng-platforms.inc
 
 SRC_URI = "https://lttng.org/files/${BPN}/${BPN}-${PV}.tar.bz2 \
            file://0009-Rename-genhd-wrapper-to-blkdev.patch \
+           file://0001-fix-net-skb-introduce-kfree_skb_reason-v5.15.58.v5.1.patch \
            "
 
 # Use :append here so that the patch is applied also when using devupstream