[PATCH 1/1 V4] selftests: net: improve missing modules error message

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The error message describing the required modules is inaccurate.
Currently, only  "SKIP: Need act_mirred module" is printed when any of
the modules are missing. As a result, users might only include that
module; however, three modules are required.

Fix the error message to show any/all modules needed for the script file
to properly execute.

Signed-off-by: David Hunter <david.hunter.linux@xxxxxxxxx>
---

V1 
	- https://lore.kernel.org/all/20240820202116.6124-1-david.hunter.linux@xxxxxxxxx/
V2
	- https://lore.kernel.org/all/20240823054833.144612-1-david.hunter.linux@xxxxxxxxx/
	- included subject prefixes
	- split the patch into two separate patches (one for each issue)
	- fixed typos in message body
	- removed second, unnecessary for loop
V3
	- https://lore.kernel.org/all/20240827205629.51004-1-david.hunter.linux@xxxxxxxxx/#r
	- fixed subject prefix (omit capitilization)
	- fixed spelling mistake in commit message
	- fixed coding style based on recommendations
---
 .../selftests/net/test_ingress_egress_chaining.sh    | 12 +++++++++++-
 1 file changed, 11 insertions(+), 1 deletion(-)

diff --git a/tools/testing/selftests/net/test_ingress_egress_chaining.sh b/tools/testing/selftests/net/test_ingress_egress_chaining.sh
index 08adff6bb3b6..007a5d04c3e1 100644
--- a/tools/testing/selftests/net/test_ingress_egress_chaining.sh
+++ b/tools/testing/selftests/net/test_ingress_egress_chaining.sh
@@ -13,10 +13,20 @@ if [ "$(id -u)" -ne 0 ];then
 fi
 
 needed_mods="act_mirred cls_flower sch_ingress"
+mods_missing=""
+numb_mods_needed=0
+
 for mod in $needed_mods; do
-	modinfo $mod &>/dev/null || { echo "SKIP: Need act_mirred module"; exit $ksft_skip; }
+	modinfo $mod &>/dev/null && continue
+	mods_missing="$mods_missing$mod "
+	numb_mods_needed=$(expr $numb_mods_needed + 1)
 done
 
+if [ $numb_mods_needed -gt 0 ]; then
+	echo "SKIP: $numb_mods_needed modules needed: $mods_missing"
+	exit $ksft_skip
+fi
+
 ns="ns$((RANDOM%899+100))"
 veth1="veth1$((RANDOM%899+100))"
 veth2="veth2$((RANDOM%899+100))"
-- 
2.43.0





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