lttng-tools: fix rotation-destroy-flush test fails if no kernel module present

lttng-tools supports testing the userspace application without kernel
module since oe-core commit e0d8494b, this is a fix that testcase
rotation-destroy-flush report LTTNG_ABORT_ON_ERROR when no lttng kernel
module present.

Fixes: e0d8494b (lttng-tools: skip kernel tests if no kernel modules present)

(From OE-Core rev: 34b6554f9f889e84ab6004c4af87e0714b8263c4)

Signed-off-by: Xiangyu Chen <xiangyu.chen@windriver.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

2 files changed, 57 insertions, 0 deletions

diff --git a/meta/recipes-kernel/lttng/lttng-tools/0001-Fix-rotation-destroy-flush-fix-session-daemon-abort-.patch b/meta/recipes-kernel/lttng/lttng-tools/0001-Fix-rotation-destroy-flush-fix-session-daemon-abort-.patch
new file mode 100644
index 0000000000..3286dfb5c1
--- /dev/null
+++ b/meta/recipes-kernel/lttng/lttng-tools/0001-Fix-rotation-destroy-flush-fix-session-daemon-abort-.patch
@@ -0,0 +1,56 @@
+From 6b45c5f80d20e7bbf3d98c1fa17d2cf8716af3bb Mon Sep 17 00:00:00 2001
+From: Xiangyu Chen <xiangyu.chen@windriver.com>
+Date: Mon, 25 Mar 2024 18:20:14 +0800
+Subject: [PATCH] Fix: rotation-destroy-flush: fix session daemon abort if no
+ kernel module present
+
+Testing rotation-destroy-flush when no lttng kernel modules present, it would
+be failed with error message:
+
+  Error: Unable to load required module lttng-ring-buffer-client-discard
+  not ok 1 - Start session daemon
+  Failed test 'Start session daemon'
+  not ok 2 - Create session rotation_destroy_flush in -o /tmp/tmp.test_rot ...
+  ...
+
+This because test script that sets the LTTNG_ABORT_ON_ERROR environment
+variable. It's this environment variable that causes the sessiond to handle the
+kernel module loading failure as an abort rather than a warning.
+
+Using "check_skip_kernel_test" to detect whether the kernel module fails to
+load is expected or not. If the failure is expected, the script won't set that
+environment variable any more.
+
+Fixes: 3a174400
+("tests:add check_skip_kernel_test to check root user and lttng kernel modules")
+
+Upstream-Status: Submitted [https://review.lttng.org/c/lttng-tools/+/12155]
+
+Change-Id: I371e9ba717613e2940186f710cf3cccd35baed6c
+Signed-off-by: Xiangyu Chen <xiangyu.chen@windriver.com>
+---
+ .../ust/rotation-destroy-flush/test_rotation_destroy_flush  | 6 +++---
+ 1 file changed, 3 insertions(+), 3 deletions(-)
+
+diff --git a/tests/regression/ust/rotation-destroy-flush/test_rotation_destroy_flush b/tests/regression/ust/rotation-destroy-flush/test_rotation_destroy_flush
+index 669bcbc43..64161768f 100755
+--- a/tests/regression/ust/rotation-destroy-flush/test_rotation_destroy_flush
++++ b/tests/regression/ust/rotation-destroy-flush/test_rotation_destroy_flush
+@@ -23,11 +23,11 @@ SIZE_LIMIT=$PAGE_SIZE
+ NR_ITER=10
+ NUM_TESTS=$((15*$NR_ITER))
+ 
+-# Ensure the daemons invoke abort on error.
+-export LTTNG_ABORT_ON_ERROR=1
+-
+ source $TESTDIR/utils/utils.sh
+ 
++# Ensure the daemons invoke abort on error.
++check_skip_kernel_test || export LTTNG_ABORT_ON_ERROR=1
++
+ # MUST set TESTDIR before calling those functions
+ function run_app()
+ {
+-- 
+2.25.1
+
diff --git a/meta/recipes-kernel/lttng/lttng-tools_2.13.11.bb b/meta/recipes-kernel/lttng/lttng-tools_2.13.11.bb
index 08144e271c..f6abd9e11a 100644
--- a/meta/recipes-kernel/lttng/lttng-tools_2.13.11.bb
+++ b/meta/recipes-kernel/lttng/lttng-tools_2.13.11.bb
@@ -38,6 +38,7 @@ SRC_URI = "https://lttng.org/files/lttng-tools/lttng-tools-${PV}.tar.bz2 \
            file://disable-tests.patch \
            file://0001-compat-Define-off64_t-as-off_t-on-linux.patch \
            file://0001-tests-add-check_skip_kernel_test-to-check-root-user-.patch \
+           file://0001-Fix-rotation-destroy-flush-fix-session-daemon-abort-.patch \
            "
 
 SRC_URI[sha256sum] = "ac5baeef9fa690936b1ca01ecd1742da762c2c08511ff1b4e923938d94d0f979"