selftests: tc-testing: remove buildebpf plugin

As tdc only tests loading/deleting and anything more complicated is
better left to the ebpf test suite, provide a pre-compiled version of
'action.c' and don't bother compiling it in kselftests or on the fly
at all.

Cc: Davide Caratti <dcaratti@redhat.com>
Signed-off-by: Pedro Tammela <pctammela@mojatatu.com>
Acked-by: Jamal Hadi Salim <jhs@mojatatu.com>
Link: https://lore.kernel.org/r/20231124154248.315470-2-pctammela@mojatatu.comSigned-off-by: Jakub Kicinski <kuba@kernel.org>

tools/testing/selftests/tc-testing/Makefile

 # SPDX-License-Identifier: GPL-2.0
-include ../../../scripts/Makefile.include
 
-top_srcdir = $(abspath ../../../..)
-APIDIR := $(top_scrdir)/include/uapi
-TEST_GEN_FILES = action.o
+TEST_PROGS += ./tdc.sh
+TEST_FILES := action-ebpf tdc*.py Tdc*.py plugins plugin-lib tc-tests scripts
 
 include ../lib.mk
-
-PROBE := $(shell $(LLC) -march=bpf -mcpu=probe -filetype=null /dev/null 2>&1)
-
-ifeq ($(PROBE),)
-  CPU ?= probe
-else
-  CPU ?= generic
-endif
-
-CLANG_SYS_INCLUDES := $(shell $(CLANG) -v -E - </dev/null 2>&1 \
-	| sed -n '/<...> search starts here:/,/End of search list./{ s| \(/.*\)|-idirafter \1|p }')
-
-CLANG_FLAGS = -I. -I$(APIDIR) \
-	      $(CLANG_SYS_INCLUDES) \
-	      -Wno-compare-distinct-pointer-types
-
-$(OUTPUT)/%.o: %.c
-	$(CLANG) $(CLANG_FLAGS) \
-		 -O2 --target=bpf -emit-llvm -c $< -o - |      \
-	$(LLC) -march=bpf -mcpu=$(CPU) $(LLC_FLAGS) -filetype=obj -o $@
-
-TEST_PROGS += ./tdc.sh
-TEST_FILES := tdc*.py Tdc*.py plugins plugin-lib tc-tests scripts

tools/testing/selftests/tc-testing/README

@@ -195,8 +195,6 @@ directory:
       and the other is a test whether the command leaked memory or not.
       (This one is a preliminary version, it may not work quite right yet,
       but the overall template is there and it should only need tweaks.)
-  - buildebpfPlugin.py:
-      builds all programs in $EBPFDIR.
 
 
 ACKNOWLEDGEMENTS

tools/testing/selftests/tc-testing/plugin-lib/buildebpfPlugin.py

-'''
-build ebpf program
-'''
-
-import os
-import signal
-from string import Template
-import subprocess
-import time
-from TdcPlugin import TdcPlugin
-from tdc_config import *
-
-class SubPlugin(TdcPlugin):
-    def __init__(self):
-        self.sub_class = 'buildebpf/SubPlugin'
-        self.tap = ''
-        super().__init__()
-
-    def pre_suite(self, testcount, testidlist):
-        super().pre_suite(testcount, testidlist)
-
-        if self.args.buildebpf:
-            self._ebpf_makeall()
-
-    def post_suite(self, index):
-        super().post_suite(index)
-
-        self._ebpf_makeclean()
-
-    def add_args(self, parser):
-        super().add_args(parser)
-
-        self.argparser_group = self.argparser.add_argument_group(
-            'buildebpf',
-            'options for buildebpfPlugin')
-        self.argparser_group.add_argument(
-            '--nobuildebpf', action='store_false', default=True,
-            dest='buildebpf',
-            help='Don\'t build eBPF programs')
-
-        return self.argparser
-
-    def _ebpf_makeall(self):
-        if self.args.buildebpf:
-            self._make('all')
-
-    def _ebpf_makeclean(self):
-        if self.args.buildebpf:
-            self._make('clean')
-
-    def _make(self, target):
-        command = 'make -C {} {}'.format(self.args.NAMES['EBPFDIR'], target)
-        proc = subprocess.Popen(command,
-            shell=True,
-            stdout=subprocess.PIPE,
-            stderr=subprocess.PIPE,
-            env=os.environ.copy())
-        (rawout, serr) = proc.communicate()
-
-        if proc.returncode != 0 and len(serr) > 0:
-            foutput = serr.decode("utf-8")
-        else:
-            foutput = rawout.decode("utf-8")
-
-        proc.stdout.close()
-        proc.stderr.close()
-        return proc, foutput

tools/testing/selftests/tc-testing/tc-tests/actions/bpf.json

@@ -54,9 +54,6 @@
             "actions",
             "bpf"
         ],
-        "plugins": {
-                "requires": "buildebpfPlugin"
-        },
         "setup": [
             [
                 "$TC action flush action bpf",
@@ -65,10 +62,10 @@
                 255
             ]
         ],
-        "cmdUnderTest": "$TC action add action bpf object-file $EBPFDIR/action.o section action-ok index 667",
+        "cmdUnderTest": "$TC action add action bpf object-file $EBPFDIR/action-ebpf section action-ok index 667",
         "expExitCode": "0",
         "verifyCmd": "$TC action get action bpf index 667",
-        "matchPattern": "action order [0-9]*: bpf action.o:\\[action-ok\\] id [0-9].* tag [0-9a-f]{16}( jited)? default-action pipe.*index 667 ref",
+        "matchPattern": "action order [0-9]*: bpf action-ebpf:\\[action-ok\\] id [0-9].* tag [0-9a-f]{16}( jited)? default-action pipe.*index 667 ref",
         "matchCount": "1",
         "teardown": [
             "$TC action flush action bpf"
@@ -81,9 +78,6 @@
             "actions",
             "bpf"
         ],
-        "plugins": {
-                "requires": "buildebpfPlugin"
-        },
         "setup": [
             [
                 "$TC action flush action bpf",
@@ -92,10 +86,10 @@
                 255
             ]
         ],
-        "cmdUnderTest": "$TC action add action bpf object-file $EBPFDIR/action.o section action-ko index 667",
+        "cmdUnderTest": "$TC action add action bpf object-file $EBPFDIR/action-ebpf section action-ko index 667",
         "expExitCode": "255",
         "verifyCmd": "$TC action get action bpf index 667",
-        "matchPattern": "action order [0-9]*: bpf action.o:\\[action-ko\\] id [0-9].*index 667 ref",
+        "matchPattern": "action order [0-9]*: bpf action-ebpf:\\[action-ko\\] id [0-9].*index 667 ref",
         "matchCount": "0",
         "teardown": [
             [

tools/testing/selftests/tc-testing/tc-tests/filters/bpf.json

@@ -52,17 +52,16 @@
         ],
         "plugins": {
             "requires": [
-               "buildebpfPlugin",
                "nsPlugin"
             ]
         },
         "setup": [
             "$TC qdisc add dev $DEV1 ingress"
         ],
-        "cmdUnderTest": "$TC filter add dev $DEV1 parent ffff: handle 1 protocol ip prio 100 bpf object-file $EBPFDIR/action.o section action-ok",
+        "cmdUnderTest": "$TC filter add dev $DEV1 parent ffff: handle 1 protocol ip prio 100 bpf object-file $EBPFDIR/action-ebpf section action-ok",
         "expExitCode": "0",
         "verifyCmd": "$TC filter get dev $DEV1 parent ffff: handle 1 protocol ip prio 100 bpf",
-        "matchPattern": "filter parent ffff: protocol ip pref 100 bpf chain [0-9]+ handle 0x1 action.o:\\[action-ok\\].*tag [0-9a-f]{16}( jited)?",
+        "matchPattern": "filter parent ffff: protocol ip pref 100 bpf chain [0-9]+ handle 0x1 action-ebpf:\\[action-ok\\].*tag [0-9a-f]{16}( jited)?",
         "matchCount": "1",
         "teardown": [
             "$TC qdisc del dev $DEV1 ingress"
@@ -77,17 +76,16 @@
         ],
         "plugins": {
             "requires": [
-               "buildebpfPlugin",
                "nsPlugin"
             ]
         },
         "setup": [
             "$TC qdisc add dev $DEV1 ingress"
         ],
-        "cmdUnderTest": "$TC filter add dev $DEV1 parent ffff: handle 1 protocol ip prio 100 bpf object-file $EBPFDIR/action.o section action-ko",
+        "cmdUnderTest": "$TC filter add dev $DEV1 parent ffff: handle 1 protocol ip prio 100 bpf object-file $EBPFDIR/action-ebpf section action-ko",
         "expExitCode": "1",
         "verifyCmd": "$TC filter get dev $DEV1 parent ffff: handle 1 protocol ip prio 100 bpf",
-        "matchPattern": "filter parent ffff: protocol ip pref 100 bpf chain [0-9]+ handle 0x1 action.o:\\[action-ko\\].*tag [0-9a-f]{16}( jited)?",
+        "matchPattern": "filter parent ffff: protocol ip pref 100 bpf chain [0-9]+ handle 0x1 action-ebpf:\\[action-ko\\].*tag [0-9a-f]{16}( jited)?",
         "matchCount": "0",
         "teardown": [
             "$TC qdisc del dev $DEV1 ingress"

tools/testing/selftests/tc-testing/tdc.sh

@@ -64,5 +64,5 @@ try_modprobe sch_hfsc
 try_modprobe sch_hhf
 try_modprobe sch_htb
 try_modprobe sch_teql
-./tdc.py -J`nproc` -c actions --nobuildebpf
+./tdc.py -J`nproc` -c actions
 ./tdc.py -J`nproc` -c qdisc