From 8cfbccb6d99a1bcfad5b16fb3f0bbca97cb5be4c Mon Sep 17 00:00:00 2001
From: Aleksa Sarai <cyphar@cyphar.com>
Date: Sun, 20 Oct 2024 19:55:00 +1100
Subject: [PATCH] tests: integration: add helper to check if we're in a userns

Signed-off-by: Aleksa Sarai <cyphar@cyphar.com>
---
 tests/integration/helpers.bash | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/tests/integration/helpers.bash b/tests/integration/helpers.bash
index 31e7dee8438..789b83e5b92 100755
--- a/tests/integration/helpers.bash
+++ b/tests/integration/helpers.bash
@@ -368,6 +368,12 @@ function rootless_cgroup() {
 	[[ "$ROOTLESS_FEATURES" == *"cgroup"* || -v RUNC_USE_SYSTEMD ]]
 }
 
+function in_userns() {
+	# The kernel guarantees the root userns inode number (and thus the value of
+	# the magic-link) is always the same value (PROC_USER_INIT_INO).
+	[[ "$(readlink /proc/self/ns/user)" != "user:[$((0xEFFFFFFD))]" ]]
+}
+
 # Check if criu is available and working.
 function have_criu() {
 	command -v criu &>/dev/null || return 1
@@ -396,7 +402,7 @@ function requires() {
 			fi
 			;;
 		root)
-			if [ $EUID -ne 0 ]; then
+			if [ $EUID -ne 0 ] || in_userns; then
 				skip_me=1
 			fi
 			;;