summaryrefslogtreecommitdiffstats
path: root/tools/testing/selftests/bpf/test_offload.py
blob: 43c9cda199b82b69ceda9eabacc25527b57516cd (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
1158
1159
1160
1161
1162
1163
1164
1165
1166
1167
1168
1169
1170
1171
1172
1173
1174
1175
1176
1177
1178
1179
1180
1181
1182
1183
1184
1185
1186
1187
1188
1189
1190
1191
1192
1193
1194
1195
1196
1197
1198
1199
1200
1201
1202
1203
1204
1205
1206
1207
1208
1209
1210
1211
1212
1213
1214
1215
1216
1217
1218
1219
1220
1221
1222
1223
1224
1225
1226
1227
1228
1229
1230
1231
1232
1233
1234
1235
1236
1237
1238
1239
1240
1241
1242
1243
1244
1245
1246
1247
1248
1249
1250
1251
1252
1253
1254
1255
1256
1257
1258
1259
1260
1261
1262
1263
1264
1265
1266
1267
1268
1269
1270
1271
1272
1273
1274
1275
1276
1277
1278
1279
1280
1281
1282
1283
1284
1285
1286
1287
1288
1289
1290
1291
1292
1293
1294
1295
1296
1297
1298
1299
1300
1301
1302
1303
1304
1305
1306
1307
1308
1309
1310
1311
1312
1313
1314
1315
1316
1317
1318
1319
1320
1321
1322
1323
1324
1325
1326
1327
1328
1329
1330
1331
1332
1333
1334
1335
1336
1337
1338
1339
1340
1341
1342
1343
1344
1345
1346
1347
1348
1349
1350
1351
1352
1353
1354
1355
1356
1357
1358
1359
1360
1361
1362
1363
1364
1365
1366
1367
1368
1369
1370
1371
1372
1373
1374
1375
1376
1377
1378
1379
1380
1381
1382
1383
1384
1385
1386
1387
1388
1389
1390
1391
1392
1393
1394
1395
1396
1397
1398
1399
1400
1401
#!/usr/bin/python3

# Copyright (C) 2017 Netronome Systems, Inc.
# Copyright (c) 2019 Mellanox Technologies. All rights reserved
#
# This software is licensed under the GNU General License Version 2,
# June 1991 as shown in the file COPYING in the top-level directory of this
# source tree.
#
# THE COPYRIGHT HOLDERS AND/OR OTHER PARTIES PROVIDE THE PROGRAM "AS IS"
# WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING,
# BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
# FOR A PARTICULAR PURPOSE. THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE
# OF THE PROGRAM IS WITH YOU. SHOULD THE PROGRAM PROVE DEFECTIVE, YOU ASSUME
# THE COST OF ALL NECESSARY SERVICING, REPAIR OR CORRECTION.

from datetime import datetime
import argparse
import errno
import json
import os
import pprint
import random
import re
import stat
import string
import struct
import subprocess
import time
import traceback

logfile = None
log_level = 1
skip_extack = False
bpf_test_dir = os.path.dirname(os.path.realpath(__file__))
pp = pprint.PrettyPrinter()
devs = [] # devices we created for clean up
files = [] # files to be removed
netns = [] # net namespaces to be removed

def log_get_sec(level=0):
    return "*" * (log_level + level)

def log_level_inc(add=1):
    global log_level
    log_level += add

def log_level_dec(sub=1):
    global log_level
    log_level -= sub

def log_level_set(level):
    global log_level
    log_level = level

def log(header, data, level=None):
    """
    Output to an optional log.
    """
    if logfile is None:
        return
    if level is not None:
        log_level_set(level)

    if not isinstance(data, str):
        data = pp.pformat(data)

    if len(header):
        logfile.write("\n" + log_get_sec() + " ")
        logfile.write(header)
    if len(header) and len(data.strip()):
        logfile.write("\n")
    logfile.write(data)

def skip(cond, msg):
    if not cond:
        return
    print("SKIP: " + msg)
    log("SKIP: " + msg, "", level=1)
    os.sys.exit(0)

def fail(cond, msg):
    if not cond:
        return
    print("FAIL: " + msg)
    tb = "".join(traceback.extract_stack().format())
    print(tb)
    log("FAIL: " + msg, tb, level=1)
    os.sys.exit(1)

def start_test(msg):
    log(msg, "", level=1)
    log_level_inc()
    print(msg)

def cmd(cmd, shell=True, include_stderr=False, background=False, fail=True):
    """
    Run a command in subprocess and return tuple of (retval, stdout);
    optionally return stderr as well as third value.
    """
    proc = subprocess.Popen(cmd, shell=shell, stdout=subprocess.PIPE,
                            stderr=subprocess.PIPE)
    if background:
        msg = "%s START: %s" % (log_get_sec(1),
                                datetime.now().strftime("%H:%M:%S.%f"))
        log("BKG " + proc.args, msg)
        return proc

    return cmd_result(proc, include_stderr=include_stderr, fail=fail)

def cmd_result(proc, include_stderr=False, fail=False):
    stdout, stderr = proc.communicate()
    stdout = stdout.decode("utf-8")
    stderr = stderr.decode("utf-8")
    proc.stdout.close()
    proc.stderr.close()

    stderr = "\n" + stderr
    if stderr[-1] == "\n":
        stderr = stderr[:-1]

    sec = log_get_sec(1)
    log("CMD " + proc.args,
        "RETCODE: %d\n%s STDOUT:\n%s%s STDERR:%s\n%s END: %s" %
        (proc.returncode, sec, stdout, sec, stderr,
         sec, datetime.now().strftime("%H:%M:%S.%f")))

    if proc.returncode != 0 and fail:
        if len(stderr) > 0 and stderr[-1] == "\n":
            stderr = stderr[:-1]
        raise Exception("Command failed: %s\n%s" % (proc.args, stderr))

    if include_stderr:
        return proc.returncode, stdout, stderr
    else:
        return proc.returncode, stdout

def rm(f):
    cmd("rm -f %s" % (f))
    if f in files:
        files.remove(f)

def tool(name, args, flags, JSON=True, ns="", fail=True, include_stderr=False):
    params = ""
    if JSON:
        params += "%s " % (flags["json"])

    if ns != "":
        ns = "ip netns exec %s " % (ns)

    if include_stderr:
        ret, stdout, stderr = cmd(ns + name + " " + params + args,
                                  fail=fail, include_stderr=True)
    else:
        ret, stdout = cmd(ns + name + " " + params + args,
                          fail=fail, include_stderr=False)

    if JSON and len(stdout.strip()) != 0:
        out = json.loads(stdout)
    else:
        out = stdout

    if include_stderr:
        return ret, out, stderr
    else:
        return ret, out

def bpftool(args, JSON=True, ns="", fail=True, include_stderr=False):
    return tool("bpftool", args, {"json":"-p"}, JSON=JSON, ns=ns,
                fail=fail, include_stderr=include_stderr)

def bpftool_prog_list(expected=None, ns=""):
    _, progs = bpftool("prog show", JSON=True, ns=ns, fail=True)
    # Remove the base progs
    for p in base_progs:
        if p in progs:
            progs.remove(p)
    if expected is not None:
        if len(progs) != expected:
            fail(True, "%d BPF programs loaded, expected %d" %
                 (len(progs), expected))
    return progs

def bpftool_map_list(expected=None, ns=""):
    _, maps = bpftool("map show", JSON=True, ns=ns, fail=True)
    # Remove the base maps
    for m in base_maps:
        if m in maps:
            maps.remove(m)
    if expected is not None:
        if len(maps) != expected:
            fail(True, "%d BPF maps loaded, expected %d" %
                 (len(maps), expected))
    return maps

def bpftool_prog_list_wait(expected=0, n_retry=20):
    for i in range(n_retry):
        nprogs = len(bpftool_prog_list())
        if nprogs == expected:
            return
        time.sleep(0.05)
    raise Exception("Time out waiting for program counts to stabilize want %d, have %d" % (expected, nprogs))

def bpftool_map_list_wait(expected=0, n_retry=20):
    for i in range(n_retry):
        nmaps = len(bpftool_map_list())
        if nmaps == expected:
            return
        time.sleep(0.05)
    raise Exception("Time out waiting for map counts to stabilize want %d, have %d" % (expected, nmaps))

def bpftool_prog_load(sample, file_name, maps=[], prog_type="xdp", dev=None,
                      fail=True, include_stderr=False):
    args = "prog load %s %s" % (os.path.join(bpf_test_dir, sample), file_name)
    if prog_type is not None:
        args += " type " + prog_type
    if dev is not None:
        args += " dev " + dev
    if len(maps):
        args += " map " + " map ".join(maps)

    res = bpftool(args, fail=fail, include_stderr=include_stderr)
    if res[0] == 0:
        files.append(file_name)
    return res

def ip(args, force=False, JSON=True, ns="", fail=True, include_stderr=False):
    if force:
        args = "-force " + args
    return tool("ip", args, {"json":"-j"}, JSON=JSON, ns=ns,
                fail=fail, include_stderr=include_stderr)

def tc(args, JSON=True, ns="", fail=True, include_stderr=False):
    return tool("tc", args, {"json":"-p"}, JSON=JSON, ns=ns,
                fail=fail, include_stderr=include_stderr)

def ethtool(dev, opt, args, fail=True):
    return cmd("ethtool %s %s %s" % (opt, dev["ifname"], args), fail=fail)

def bpf_obj(name, sec=".text", path=bpf_test_dir,):
    return "obj %s sec %s" % (os.path.join(path, name), sec)

def bpf_pinned(name):
    return "pinned %s" % (name)

def bpf_bytecode(bytecode):
    return "bytecode \"%s\"" % (bytecode)

def mknetns(n_retry=10):
    for i in range(n_retry):
        name = ''.join([random.choice(string.ascii_letters) for i in range(8)])
        ret, _ = ip("netns add %s" % (name), fail=False)
        if ret == 0:
            netns.append(name)
            return name
    return None

def int2str(fmt, val):
    ret = []
    for b in struct.pack(fmt, val):
        ret.append(int(b))
    return " ".join(map(lambda x: str(x), ret))

def str2int(strtab):
    inttab = []
    for i in strtab:
        inttab.append(int(i, 16))
    ba = bytearray(inttab)
    if len(strtab) == 4:
        fmt = "I"
    elif len(strtab) == 8:
        fmt = "Q"
    else:
        raise Exception("String array of len %d can't be unpacked to an int" %
                        (len(strtab)))
    return struct.unpack(fmt, ba)[0]

class DebugfsDir:
    """
    Class for accessing DebugFS directories as a dictionary.
    """

    def __init__(self, path):
        self.path = path
        self._dict = self._debugfs_dir_read(path)

    def __len__(self):
        return len(self._dict.keys())

    def __getitem__(self, key):
        if type(key) is int:
            key = list(self._dict.keys())[key]
        return self._dict[key]

    def __setitem__(self, key, value):
        log("DebugFS set %s = %s" % (key, value), "")
        log_level_inc()

        cmd("echo '%s' > %s/%s" % (value, self.path, key))
        log_level_dec()

        _, out = cmd('cat %s/%s' % (self.path, key))
        self._dict[key] = out.strip()

    def _debugfs_dir_read(self, path):
        dfs = {}

        log("DebugFS state for %s" % (path), "")
        log_level_inc(add=2)

        _, out = cmd('ls ' + path)
        for f in out.split():
            if f == "ports":
                continue

            p = os.path.join(path, f)
            if not os.stat(p).st_mode & stat.S_IRUSR:
                continue

            if os.path.isfile(p):
                # We need to init trap_flow_action_cookie before read it
                if f == "trap_flow_action_cookie":
                    cmd('echo deadbeef > %s/%s' % (path, f))
                _, out = cmd('cat %s/%s' % (path, f))
                dfs[f] = out.strip()
            elif os.path.isdir(p):
                dfs[f] = DebugfsDir(p)
            else:
                raise Exception("%s is neither file nor directory" % (p))

        log_level_dec()
        log("DebugFS state", dfs)
        log_level_dec()

        return dfs

class NetdevSimDev:
    """
    Class for netdevsim bus device and its attributes.
    """
    @staticmethod
    def ctrl_write(path, val):
        fullpath = os.path.join("/sys/bus/netdevsim/", path)
        try:
            with open(fullpath, "w") as f:
                f.write(val)
        except OSError as e:
            log("WRITE %s: %r" % (fullpath, val), -e.errno)
            raise e
        log("WRITE %s: %r" % (fullpath, val), 0)

    def __init__(self, port_count=1):
        addr = 0
        while True:
            try:
                self.ctrl_write("new_device", "%u %u" % (addr, port_count))
            except OSError as e:
                if e.errno == errno.ENOSPC:
                    addr += 1
                    continue
                raise e
            break
        self.addr = addr

        # As probe of netdevsim device might happen from a workqueue,
        # so wait here until all netdevs appear.
        self.wait_for_netdevs(port_count)

        ret, out = cmd("udevadm settle", fail=False)
        if ret:
            raise Exception("udevadm settle failed")
        ifnames = self.get_ifnames()

        devs.append(self)
        self.dfs_dir = "/sys/kernel/debug/netdevsim/netdevsim%u/" % addr

        self.nsims = []
        for port_index in range(port_count):
            self.nsims.append(NetdevSim(self, port_index, ifnames[port_index]))

    def get_ifnames(self):
        ifnames = []
        listdir = os.listdir("/sys/bus/netdevsim/devices/netdevsim%u/net/" % self.addr)
        for ifname in listdir:
            ifnames.append(ifname)
        ifnames.sort()
        return ifnames

    def wait_for_netdevs(self, port_count):
        timeout = 5
        timeout_start = time.time()

        while True:
            try:
                ifnames = self.get_ifnames()
            except FileNotFoundError as e:
                ifnames = []
            if len(ifnames) == port_count:
                break
            if time.time() < timeout_start + timeout:
                continue
            raise Exception("netdevices did not appear within timeout")

    def dfs_num_bound_progs(self):
        path = os.path.join(self.dfs_dir, "bpf_bound_progs")
        _, progs = cmd('ls %s' % (path))
        return len(progs.split())

    def dfs_get_bound_progs(self, expected):
        progs = DebugfsDir(os.path.join(self.dfs_dir, "bpf_bound_progs"))
        if expected is not None:
            if len(progs) != expected:
                fail(True, "%d BPF programs bound, expected %d" %
                     (len(progs), expected))
        return progs

    def remove(self):
        self.ctrl_write("del_device", "%u" % (self.addr, ))
        devs.remove(self)

    def remove_nsim(self, nsim):
        self.nsims.remove(nsim)
        self.ctrl_write("devices/netdevsim%u/del_port" % (self.addr, ),
                        "%u" % (nsim.port_index, ))

class NetdevSim:
    """
    Class for netdevsim netdevice and its attributes.
    """

    def __init__(self, nsimdev, port_index, ifname):
        # In case udev renamed the netdev to according to new schema,
        # check if the name matches the port_index.
        nsimnamere = re.compile("eni\d+np(\d+)")
        match = nsimnamere.match(ifname)
        if match and int(match.groups()[0]) != port_index + 1:
            raise Exception("netdevice name mismatches the expected one")

        self.nsimdev = nsimdev
        self.port_index = port_index
        self.ns = ""
        self.dfs_dir = "%s/ports/%u/" % (nsimdev.dfs_dir, port_index)
        self.dfs_refresh()
        _, [self.dev] = ip("link show dev %s" % ifname)

    def __getitem__(self, key):
        return self.dev[key]

    def remove(self):
        self.nsimdev.remove_nsim(self)

    def dfs_refresh(self):
        self.dfs = DebugfsDir(self.dfs_dir)
        return self.dfs

    def dfs_read(self, f):
        path = os.path.join(self.dfs_dir, f)
        _, data = cmd('cat %s' % (path))
        return data.strip()

    def wait_for_flush(self, bound=0, total=0, n_retry=20):
        for i in range(n_retry):
            nbound = self.nsimdev.dfs_num_bound_progs()
            nprogs = len(bpftool_prog_list())
            if nbound == bound and nprogs == total:
                return
            time.sleep(0.05)
        raise Exception("Time out waiting for program counts to stabilize want %d/%d, have %d bound, %d loaded" % (bound, total, nbound, nprogs))

    def set_ns(self, ns):
        name = "1" if ns == "" else ns
        ip("link set dev %s netns %s" % (self.dev["ifname"], name), ns=self.ns)
        self.ns = ns

    def set_mtu(self, mtu, fail=True):
        return ip("link set dev %s mtu %d" % (self.dev["ifname"], mtu),
                  fail=fail)

    def set_xdp(self, bpf, mode, force=False, JSON=True, verbose=False,
                fail=True, include_stderr=False):
        if verbose:
            bpf += " verbose"
        return ip("link set dev %s xdp%s %s" % (self.dev["ifname"], mode, bpf),
                  force=force, JSON=JSON,
                  fail=fail, include_stderr=include_stderr)

    def unset_xdp(self, mode, force=False, JSON=True,
                  fail=True, include_stderr=False):
        return ip("link set dev %s xdp%s off" % (self.dev["ifname"], mode),
                  force=force, JSON=JSON,
                  fail=fail, include_stderr=include_stderr)

    def ip_link_show(self, xdp):
        _, link = ip("link show dev %s" % (self['ifname']))
        if len(link) > 1:
            raise Exception("Multiple objects on ip link show")
        if len(link) < 1:
            return {}
        fail(xdp != "xdp" in link,
             "XDP program not reporting in iplink (reported %s, expected %s)" %
             ("xdp" in link, xdp))
        return link[0]

    def tc_add_ingress(self):
        tc("qdisc add dev %s ingress" % (self['ifname']))

    def tc_del_ingress(self):
        tc("qdisc del dev %s ingress" % (self['ifname']))

    def tc_flush_filters(self, bound=0, total=0):
        self.tc_del_ingress()
        self.tc_add_ingress()
        self.wait_for_flush(bound=bound, total=total)

    def tc_show_ingress(self, expected=None):
        # No JSON support, oh well...
        flags = ["skip_sw", "skip_hw", "in_hw"]
        named = ["protocol", "pref", "chain", "handle", "id", "tag"]

        args = "-s filter show dev %s ingress" % (self['ifname'])
        _, out = tc(args, JSON=False)

        filters = []
        lines = out.split('\n')
        for line in lines:
            words = line.split()
            if "handle" not in words:
                continue
            fltr = {}
            for flag in flags:
                fltr[flag] = flag in words
            for name in named:
                try:
                    idx = words.index(name)
                    fltr[name] = words[idx + 1]
                except ValueError:
                    pass
            filters.append(fltr)

        if expected is not None:
            fail(len(filters) != expected,
                 "%d ingress filters loaded, expected %d" %
                 (len(filters), expected))
        return filters

    def cls_filter_op(self, op, qdisc="ingress", prio=None, handle=None,
                      chain=None, cls="", params="",
                      fail=True, include_stderr=False):
        spec = ""
        if prio is not None:
            spec += " prio %d" % (prio)
        if handle:
            spec += " handle %s" % (handle)
        if chain is not None:
            spec += " chain %d" % (chain)

        return tc("filter {op} dev {dev} {qdisc} {spec} {cls} {params}"\
                  .format(op=op, dev=self['ifname'], qdisc=qdisc, spec=spec,
                          cls=cls, params=params),
                  fail=fail, include_stderr=include_stderr)

    def cls_bpf_add_filter(self, bpf, op="add", prio=None, handle=None,
                           chain=None, da=False, verbose=False,
                           skip_sw=False, skip_hw=False,
                           fail=True, include_stderr=False):
        cls = "bpf " + bpf

        params = ""
        if da:
            params += " da"
        if verbose:
            params += " verbose"
        if skip_sw:
            params += " skip_sw"
        if skip_hw:
            params += " skip_hw"

        return self.cls_filter_op(op=op, prio=prio, handle=handle, cls=cls,
                                  chain=chain, params=params,
                                  fail=fail, include_stderr=include_stderr)

    def set_ethtool_tc_offloads(self, enable, fail=True):
        args = "hw-tc-offload %s" % ("on" if enable else "off")
        return ethtool(self, "-K", args, fail=fail)

################################################################################
def clean_up():
    global files, netns, devs

    for dev in devs:
        dev.remove()
    for f in files:
        cmd("rm -f %s" % (f))
    for ns in netns:
        cmd("ip netns delete %s" % (ns))
    files = []
    netns = []

def pin_prog(file_name, idx=0):
    progs = bpftool_prog_list(expected=(idx + 1))
    prog = progs[idx]
    bpftool("prog pin id %d %s" % (prog["id"], file_name))
    files.append(file_name)

    return file_name, bpf_pinned(file_name)

def pin_map(file_name, idx=0, expected=1):
    maps = bpftool_map_list(expected=expected)
    m = maps[idx]
    bpftool("map pin id %d %s" % (m["id"], file_name))
    files.append(file_name)

    return file_name, bpf_pinned(file_name)

def check_dev_info_removed(prog_file=None, map_file=None):
    bpftool_prog_list(expected=0)
    ret, err = bpftool("prog show pin %s" % (prog_file), fail=False)
    fail(ret == 0, "Showing prog with removed device did not fail")
    fail(err["error"].find("No such device") == -1,
         "Showing prog with removed device expected ENODEV, error is %s" %
         (err["error"]))

    bpftool_map_list(expected=0)
    ret, err = bpftool("map show pin %s" % (map_file), fail=False)
    fail(ret == 0, "Showing map with removed device did not fail")
    fail(err["error"].find("No such device") == -1,
         "Showing map with removed device expected ENODEV, error is %s" %
         (err["error"]))

def check_dev_info(other_ns, ns, prog_file=None, map_file=None, removed=False):
    progs = bpftool_prog_list(expected=1, ns=ns)
    prog = progs[0]

    fail("dev" not in prog.keys(), "Device parameters not reported")
    dev = prog["dev"]
    fail("ifindex" not in dev.keys(), "Device parameters not reported")
    fail("ns_dev" not in dev.keys(), "Device parameters not reported")
    fail("ns_inode" not in dev.keys(), "Device parameters not reported")

    if not other_ns:
        fail("ifname" not in dev.keys(), "Ifname not reported")
        fail(dev["ifname"] != sim["ifname"],
             "Ifname incorrect %s vs %s" % (dev["ifname"], sim["ifname"]))
    else:
        fail("ifname" in dev.keys(), "Ifname is reported for other ns")

    maps = bpftool_map_list(expected=2, ns=ns)
    for m in maps:
        fail("dev" not in m.keys(), "Device parameters not reported")
        fail(dev != m["dev"], "Map's device different than program's")

def check_extack(output, reference, args):
    if skip_extack:
        return
    lines = output.split("\n")
    comp = len(lines) >= 2 and lines[1] == 'Error: ' + reference
    fail(not comp, "Missing or incorrect netlink extack message")

def check_extack_nsim(output, reference, args):
    check_extack(output, "netdevsim: " + reference, args)

def check_no_extack(res, needle):
    fail((res[1] + res[2]).count(needle) or (res[1] + res[2]).count("Warning:"),
         "Found '%s' in command output, leaky extack?" % (needle))

def check_verifier_log(output, reference):
    lines = output.split("\n")
    for l in reversed(lines):
        if l == reference:
            return
    fail(True, "Missing or incorrect message from netdevsim in verifier log")

def check_multi_basic(two_xdps):
    fail(two_xdps["mode"] != 4, "Bad mode reported with multiple programs")
    fail("prog" in two_xdps, "Base program reported in multi program mode")
    fail(len(two_xdps["attached"]) != 2,
         "Wrong attached program count with two programs")
    fail(two_xdps["attached"][0]["prog"]["id"] ==
         two_xdps["attached"][1]["prog"]["id"],
         "Offloaded and other programs have the same id")

def test_spurios_extack(sim, obj, skip_hw, needle):
    res = sim.cls_bpf_add_filter(obj, prio=1, handle=1, skip_hw=skip_hw,
                                 include_stderr=True)
    check_no_extack(res, needle)
    res = sim.cls_bpf_add_filter(obj, op="replace", prio=1, handle=1,
                                 skip_hw=skip_hw, include_stderr=True)
    check_no_extack(res, needle)
    res = sim.cls_filter_op(op="delete", prio=1, handle=1, cls="bpf",
                            include_stderr=True)
    check_no_extack(res, needle)

def test_multi_prog(simdev, sim, obj, modename, modeid):
    start_test("Test multi-attachment XDP - %s + offload..." %
               (modename or "default", ))
    sim.set_xdp(obj, "offload")
    xdp = sim.ip_link_show(xdp=True)["xdp"]
    offloaded = sim.dfs_read("bpf_offloaded_id")
    fail("prog" not in xdp, "Base program not reported in single program mode")
    fail(len(xdp["attached"]) != 1,
         "Wrong attached program count with one program")

    sim.set_xdp(obj, modename)
    two_xdps = sim.ip_link_show(xdp=True)["xdp"]

    fail(xdp["attached"][0] not in two_xdps["attached"],
         "Offload program not reported after other activated")
    check_multi_basic(two_xdps)

    offloaded2 = sim.dfs_read("bpf_offloaded_id")
    fail(offloaded != offloaded2,
         "Offload ID changed after loading other program")

    start_test("Test multi-attachment XDP - replace...")
    ret, _, err = sim.set_xdp(obj, "offload", fail=False, include_stderr=True)
    fail(ret == 0, "Replaced one of programs without -force")
    check_extack(err, "XDP program already attached.", args)

    if modename == "" or modename == "drv":
        othermode = "" if modename == "drv" else "drv"
        start_test("Test multi-attachment XDP - detach...")
        ret, _, err = sim.unset_xdp(othermode, force=True,
                                    fail=False, include_stderr=True)
        fail(ret == 0, "Removed program with a bad mode")
        check_extack(err, "program loaded with different flags.", args)

    sim.unset_xdp("offload")
    xdp = sim.ip_link_show(xdp=True)["xdp"]
    offloaded = sim.dfs_read("bpf_offloaded_id")

    fail(xdp["mode"] != modeid, "Bad mode reported after multiple programs")
    fail("prog" not in xdp,
         "Base program not reported after multi program mode")
    fail(xdp["attached"][0] not in two_xdps["attached"],
         "Offload program not reported after other activated")
    fail(len(xdp["attached"]) != 1,
         "Wrong attached program count with remaining programs")
    fail(offloaded != "0", "Offload ID reported with only other program left")

    start_test("Test multi-attachment XDP - reattach...")
    sim.set_xdp(obj, "offload")
    two_xdps = sim.ip_link_show(xdp=True)["xdp"]

    fail(xdp["attached"][0] not in two_xdps["attached"],
         "Other program not reported after offload activated")
    check_multi_basic(two_xdps)

    start_test("Test multi-attachment XDP - device remove...")
    simdev.remove()

    simdev = NetdevSimDev()
    sim, = simdev.nsims
    sim.set_ethtool_tc_offloads(True)
    return [simdev, sim]

# Parse command line
parser = argparse.ArgumentParser()
parser.add_argument("--log", help="output verbose log to given file")
args = parser.parse_args()
if args.log:
    logfile = open(args.log, 'w+')
    logfile.write("# -*-Org-*-")

log("Prepare...", "", level=1)
log_level_inc()

# Check permissions
skip(os.getuid() != 0, "test must be run as root")

# Check tools
ret, progs = bpftool("prog", fail=False)
skip(ret != 0, "bpftool not installed")
base_progs = progs
_, base_maps = bpftool("map")

# Check netdevsim
ret, out = cmd("modprobe netdevsim", fail=False)
skip(ret != 0, "netdevsim module could not be loaded")

# Check debugfs
_, out = cmd("mount")
if out.find("/sys/kernel/debug type debugfs") == -1:
    cmd("mount -t debugfs none /sys/kernel/debug")

# Check samples are compiled
samples = ["sample_ret0.o", "sample_map_ret0.o"]
for s in samples:
    ret, out = cmd("ls %s/%s" % (bpf_test_dir, s), fail=False)
    skip(ret != 0, "sample %s/%s not found, please compile it" %
         (bpf_test_dir, s))

# Check if iproute2 is built with libmnl (needed by extack support)
_, _, err = cmd("tc qdisc delete dev lo handle 0",
                fail=False, include_stderr=True)
if err.find("Error: Failed to find qdisc with specified handle.") == -1:
    print("Warning: no extack message in iproute2 output, libmnl missing?")
    log("Warning: no extack message in iproute2 output, libmnl missing?", "")
    skip_extack = True

# Check if net namespaces seem to work
ns = mknetns()
skip(ns is None, "Could not create a net namespace")
cmd("ip netns delete %s" % (ns))
netns = []

try:
    obj = bpf_obj("sample_ret0.o")
    bytecode = bpf_bytecode("1,6 0 0 4294967295,")

    start_test("Test destruction of generic XDP...")
    simdev = NetdevSimDev()
    sim, = simdev.nsims
    sim.set_xdp(obj, "generic")
    simdev.remove()
    bpftool_prog_list_wait(expected=0)

    simdev = NetdevSimDev()
    sim, = simdev.nsims
    sim.tc_add_ingress()

    start_test("Test TC non-offloaded...")
    ret, _ = sim.cls_bpf_add_filter(obj, skip_hw=True, fail=False)
    fail(ret != 0, "Software TC filter did not load")

    start_test("Test TC non-offloaded isn't getting bound...")
    ret, _ = sim.cls_bpf_add_filter(obj, fail=False)
    fail(ret != 0, "Software TC filter did not load")
    simdev.dfs_get_bound_progs(expected=0)

    sim.tc_flush_filters()

    start_test("Test TC offloads are off by default...")
    ret, _, err = sim.cls_bpf_add_filter(obj, skip_sw=True,
                                         fail=False, include_stderr=True)
    fail(ret == 0, "TC filter loaded without enabling TC offloads")
    check_extack(err, "TC offload is disabled on net device.", args)
    sim.wait_for_flush()

    sim.set_ethtool_tc_offloads(True)
    sim.dfs["bpf_tc_non_bound_accept"] = "Y"

    start_test("Test TC offload by default...")
    ret, _ = sim.cls_bpf_add_filter(obj, fail=False)
    fail(ret != 0, "Software TC filter did not load")
    simdev.dfs_get_bound_progs(expected=0)
    ingress = sim.tc_show_ingress(expected=1)
    fltr = ingress[0]
    fail(not fltr["in_hw"], "Filter not offloaded by default")

    sim.tc_flush_filters()

    start_test("Test TC cBPF bytcode tries offload by default...")
    ret, _ = sim.cls_bpf_add_filter(bytecode, fail=False)
    fail(ret != 0, "Software TC filter did not load")
    simdev.dfs_get_bound_progs(expected=0)
    ingress = sim.tc_show_ingress(expected=1)
    fltr = ingress[0]
    fail(not fltr["in_hw"], "Bytecode not offloaded by default")

    sim.tc_flush_filters()
    sim.dfs["bpf_tc_non_bound_accept"] = "N"

    start_test("Test TC cBPF unbound bytecode doesn't offload...")
    ret, _, err = sim.cls_bpf_add_filter(bytecode, skip_sw=True,
                                         fail=False, include_stderr=True)
    fail(ret == 0, "TC bytecode loaded for offload")
    check_extack_nsim(err, "netdevsim configured to reject unbound programs.",
                      args)
    sim.wait_for_flush()

    start_test("Test non-0 chain offload...")
    ret, _, err = sim.cls_bpf_add_filter(obj, chain=1, prio=1, handle=1,
                                         skip_sw=True,
                                         fail=False, include_stderr=True)
    fail(ret == 0, "Offloaded a filter to chain other than 0")
    check_extack(err, "Driver supports only offload of chain 0.", args)
    sim.tc_flush_filters()

    start_test("Test TC replace...")
    sim.cls_bpf_add_filter(obj, prio=1, handle=1)
    sim.cls_bpf_add_filter(obj, op="replace", prio=1, handle=1)
    sim.cls_filter_op(op="delete", prio=1, handle=1, cls="bpf")

    sim.cls_bpf_add_filter(obj, prio=1, handle=1, skip_sw=True)
    sim.cls_bpf_add_filter(obj, op="replace", prio=1, handle=1, skip_sw=True)
    sim.cls_filter_op(op="delete", prio=1, handle=1, cls="bpf")

    sim.cls_bpf_add_filter(obj, prio=1, handle=1, skip_hw=True)
    sim.cls_bpf_add_filter(obj, op="replace", prio=1, handle=1, skip_hw=True)
    sim.cls_filter_op(op="delete", prio=1, handle=1, cls="bpf")

    start_test("Test TC replace bad flags...")
    for i in range(3):
        for j in range(3):
            ret, _ = sim.cls_bpf_add_filter(obj, op="replace", prio=1, handle=1,
                                            skip_sw=(j == 1), skip_hw=(j == 2),
                                            fail=False)
            fail(bool(ret) != bool(j),
                 "Software TC incorrect load in replace test, iteration %d" %
                 (j))
        sim.cls_filter_op(op="delete", prio=1, handle=1, cls="bpf")

    start_test("Test spurious extack from the driver...")
    test_spurios_extack(sim, obj, False, "netdevsim")
    test_spurios_extack(sim, obj, True, "netdevsim")

    sim.set_ethtool_tc_offloads(False)

    test_spurios_extack(sim, obj, False, "TC offload is disabled")
    test_spurios_extack(sim, obj, True, "TC offload is disabled")

    sim.set_ethtool_tc_offloads(True)

    sim.tc_flush_filters()

    start_test("Test TC offloads work...")
    ret, _, err = sim.cls_bpf_add_filter(obj, verbose=True, skip_sw=True,
                                         fail=False, include_stderr=True)
    fail(ret != 0, "TC filter did not load with TC offloads enabled")
    check_verifier_log(err, "[netdevsim] Hello from netdevsim!")

    start_test("Test TC offload basics...")
    dfs = simdev.dfs_get_bound_progs(expected=1)
    progs = bpftool_prog_list(expected=1)
    ingress = sim.tc_show_ingress(expected=1)

    dprog = dfs[0]
    prog = progs[0]
    fltr = ingress[0]
    fail(fltr["skip_hw"], "TC does reports 'skip_hw' on offloaded filter")
    fail(not fltr["in_hw"], "TC does not report 'in_hw' for offloaded filter")
    fail(not fltr["skip_sw"], "TC does not report 'skip_sw' back")

    start_test("Test TC offload is device-bound...")
    fail(str(prog["id"]) != fltr["id"], "Program IDs don't match")
    fail(prog["tag"] != fltr["tag"], "Program tags don't match")
    fail(fltr["id"] != dprog["id"], "Program IDs don't match")
    fail(dprog["state"] != "xlated", "Offloaded program state not translated")
    fail(dprog["loaded"] != "Y", "Offloaded program is not loaded")

    start_test("Test disabling TC offloads is rejected while filters installed...")
    ret, _ = sim.set_ethtool_tc_offloads(False, fail=False)
    fail(ret == 0, "Driver should refuse to disable TC offloads with filters installed...")

    start_test("Test qdisc removal frees things...")
    sim.tc_flush_filters()
    sim.tc_show_ingress(expected=0)

    start_test("Test disabling TC offloads is OK without filters...")
    ret, _ = sim.set_ethtool_tc_offloads(False, fail=False)
    fail(ret != 0,
         "Driver refused to disable TC offloads without filters installed...")

    sim.set_ethtool_tc_offloads(True)

    start_test("Test destroying device gets rid of TC filters...")
    sim.cls_bpf_add_filter(obj, skip_sw=True)
    simdev.remove()
    bpftool_prog_list_wait(expected=0)

    simdev = NetdevSimDev()
    sim, = simdev.nsims
    sim.set_ethtool_tc_offloads(True)

    start_test("Test destroying device gets rid of XDP...")
    sim.set_xdp(obj, "offload")
    simdev.remove()
    bpftool_prog_list_wait(expected=0)

    simdev = NetdevSimDev()
    sim, = simdev.nsims
    sim.set_ethtool_tc_offloads(True)

    start_test("Test XDP prog reporting...")
    sim.set_xdp(obj, "drv")
    ipl = sim.ip_link_show(xdp=True)
    progs = bpftool_prog_list(expected=1)
    fail(ipl["xdp"]["prog"]["id"] != progs[0]["id"],
         "Loaded program has wrong ID")

    start_test("Test XDP prog replace without force...")
    ret, _ = sim.set_xdp(obj, "drv", fail=False)
    fail(ret == 0, "Replaced XDP program without -force")
    sim.wait_for_flush(total=1)

    start_test("Test XDP prog replace with force...")
    ret, _ = sim.set_xdp(obj, "drv", force=True, fail=False)
    fail(ret != 0, "Could not replace XDP program with -force")
    bpftool_prog_list_wait(expected=1)
    ipl = sim.ip_link_show(xdp=True)
    progs = bpftool_prog_list(expected=1)
    fail(ipl["xdp"]["prog"]["id"] != progs[0]["id"],
         "Loaded program has wrong ID")
    fail("dev" in progs[0].keys(),
         "Device parameters reported for non-offloaded program")

    start_test("Test XDP prog replace with bad flags...")
    ret, _, err = sim.set_xdp(obj, "generic", force=True,
                              fail=False, include_stderr=True)
    fail(ret == 0, "Replaced XDP program with a program in different mode")
    check_extack(err,
                 "native and generic XDP can't be active at the same time.",
                 args)
    ret, _, err = sim.set_xdp(obj, "", force=True,
                              fail=False, include_stderr=True)
    fail(ret == 0, "Replaced XDP program with a program in different mode")
    check_extack(err, "program loaded with different flags.", args)

    start_test("Test XDP prog remove with bad flags...")
    ret, _, err = sim.unset_xdp("", force=True,
                                fail=False, include_stderr=True)
    fail(ret == 0, "Removed program with a bad mode")
    check_extack(err, "program loaded with different flags.", args)

    start_test("Test MTU restrictions...")
    ret, _ = sim.set_mtu(9000, fail=False)
    fail(ret == 0,
         "Driver should refuse to increase MTU to 9000 with XDP loaded...")
    sim.unset_xdp("drv")
    bpftool_prog_list_wait(expected=0)
    sim.set_mtu(9000)
    ret, _, err = sim.set_xdp(obj, "drv", fail=False, include_stderr=True)
    fail(ret == 0, "Driver should refuse to load program with MTU of 9000...")
    check_extack_nsim(err, "MTU too large w/ XDP enabled.", args)
    sim.set_mtu(1500)

    sim.wait_for_flush()
    start_test("Test non-offload XDP attaching to HW...")
    bpftool_prog_load("sample_ret0.o", "/sys/fs/bpf/nooffload")
    nooffload = bpf_pinned("/sys/fs/bpf/nooffload")
    ret, _, err = sim.set_xdp(nooffload, "offload",
                              fail=False, include_stderr=True)
    fail(ret == 0, "attached non-offloaded XDP program to HW")
    check_extack_nsim(err, "xdpoffload of non-bound program.", args)
    rm("/sys/fs/bpf/nooffload")

    start_test("Test offload XDP attaching to drv...")
    bpftool_prog_load("sample_ret0.o", "/sys/fs/bpf/offload",
                      dev=sim['ifname'])
    offload = bpf_pinned("/sys/fs/bpf/offload")
    ret, _, err = sim.set_xdp(offload, "drv", fail=False, include_stderr=True)
    fail(ret == 0, "attached offloaded XDP program to drv")
    check_extack(err, "using device-bound program without HW_MODE flag is not supported.", args)
    rm("/sys/fs/bpf/offload")
    sim.wait_for_flush()

    start_test("Test XDP offload...")
    _, _, err = sim.set_xdp(obj, "offload", verbose=True, include_stderr=True)
    ipl = sim.ip_link_show(xdp=True)
    link_xdp = ipl["xdp"]["prog"]
    progs = bpftool_prog_list(expected=1)
    prog = progs[0]
    fail(link_xdp["id"] != prog["id"], "Loaded program has wrong ID")
    check_verifier_log(err, "[netdevsim] Hello from netdevsim!")

    start_test("Test XDP offload is device bound...")
    dfs = simdev.dfs_get_bound_progs(expected=1)
    dprog = dfs[0]

    fail(prog["id"] != link_xdp["id"], "Program IDs don't match")
    fail(prog["tag"] != link_xdp["tag"], "Program tags don't match")
    fail(str(link_xdp["id"]) != dprog["id"], "Program IDs don't match")
    fail(dprog["state"] != "xlated", "Offloaded program state not translated")
    fail(dprog["loaded"] != "Y", "Offloaded program is not loaded")

    start_test("Test removing XDP program many times...")
    sim.unset_xdp("offload")
    sim.unset_xdp("offload")
    sim.unset_xdp("drv")
    sim.unset_xdp("drv")
    sim.unset_xdp("")
    sim.unset_xdp("")
    bpftool_prog_list_wait(expected=0)

    start_test("Test attempt to use a program for a wrong device...")
    simdev2 = NetdevSimDev()
    sim2, = simdev2.nsims
    sim2.set_xdp(obj, "offload")
    pin_file, pinned = pin_prog("/sys/fs/bpf/tmp")

    ret, _, err = sim.set_xdp(pinned, "offload",
                              fail=False, include_stderr=True)
    fail(ret == 0, "Pinned program loaded for a different device accepted")
    check_extack_nsim(err, "program bound to different dev.", args)
    simdev2.remove()
    ret, _, err = sim.set_xdp(pinned, "offload",
                              fail=False, include_stderr=True)
    fail(ret == 0, "Pinned program loaded for a removed device accepted")
    check_extack_nsim(err, "xdpoffload of non-bound program.", args)
    rm(pin_file)
    bpftool_prog_list_wait(expected=0)

    simdev, sim = test_multi_prog(simdev, sim, obj, "", 1)
    simdev, sim = test_multi_prog(simdev, sim, obj, "drv", 1)
    simdev, sim = test_multi_prog(simdev, sim, obj, "generic", 2)

    start_test("Test mixing of TC and XDP...")
    sim.tc_add_ingress()
    sim.set_xdp(obj, "offload")
    ret, _, err = sim.cls_bpf_add_filter(obj, skip_sw=True,
                                         fail=False, include_stderr=True)
    fail(ret == 0, "Loading TC when XDP active should fail")
    check_extack_nsim(err, "driver and netdev offload states mismatch.", args)
    sim.unset_xdp("offload")
    sim.wait_for_flush()

    sim.cls_bpf_add_filter(obj, skip_sw=True)
    ret, _, err = sim.set_xdp(obj, "offload", fail=False, include_stderr=True)
    fail(ret == 0, "Loading XDP when TC active should fail")
    check_extack_nsim(err, "TC program is already loaded.", args)

    start_test("Test binding TC from pinned...")
    pin_file, pinned = pin_prog("/sys/fs/bpf/tmp")
    sim.tc_flush_filters(bound=1, total=1)
    sim.cls_bpf_add_filter(pinned, da=True, skip_sw=True)
    sim.tc_flush_filters(bound=1, total=1)

    start_test("Test binding XDP from pinned...")
    sim.set_xdp(obj, "offload")
    pin_file, pinned = pin_prog("/sys/fs/bpf/tmp2", idx=1)

    sim.set_xdp(pinned, "offload", force=True)
    sim.unset_xdp("offload")
    sim.set_xdp(pinned, "offload", force=True)
    sim.unset_xdp("offload")

    start_test("Test offload of wrong type fails...")
    ret, _ = sim.cls_bpf_add_filter(pinned, da=True, skip_sw=True, fail=False)
    fail(ret == 0, "Managed to attach XDP program to TC")

    start_test("Test asking for TC offload of two filters...")
    sim.cls_bpf_add_filter(obj, da=True, skip_sw=True)
    ret, _, err = sim.cls_bpf_add_filter(obj, da=True, skip_sw=True,
                                         fail=False, include_stderr=True)
    fail(ret == 0, "Managed to offload two TC filters at the same time")
    check_extack_nsim(err, "driver and netdev offload states mismatch.", args)

    sim.tc_flush_filters(bound=2, total=2)

    start_test("Test if netdev removal waits for translation...")
    delay_msec = 500
    sim.dfs["dev/bpf_bind_verifier_delay"] = delay_msec
    start = time.time()
    cmd_line = "tc filter add dev %s ingress bpf %s da skip_sw" % \
               (sim['ifname'], obj)
    tc_proc = cmd(cmd_line, background=True, fail=False)
    # Wait for the verifier to start
    while simdev.dfs_num_bound_progs() <= 2:
        pass
    simdev.remove()
    end = time.time()
    ret, _ = cmd_result(tc_proc, fail=False)
    time_diff = end - start
    log("Time", "start:\t%s\nend:\t%s\ndiff:\t%s" % (start, end, time_diff))

    fail(ret == 0, "Managed to load TC filter on a unregistering device")
    delay_sec = delay_msec * 0.001
    fail(time_diff < delay_sec, "Removal process took %s, expected %s" %
         (time_diff, delay_sec))

    # Remove all pinned files and reinstantiate the netdev
    clean_up()
    bpftool_prog_list_wait(expected=0)

    simdev = NetdevSimDev()
    sim, = simdev.nsims
    map_obj = bpf_obj("sample_map_ret0.o")
    start_test("Test loading program with maps...")
    sim.set_xdp(map_obj, "offload", JSON=False) # map fixup msg breaks JSON

    start_test("Test bpftool bound info reporting (own ns)...")
    check_dev_info(False, "")

    start_test("Test bpftool bound info reporting (other ns)...")
    ns = mknetns()
    sim.set_ns(ns)
    check_dev_info(True, "")

    start_test("Test bpftool bound info reporting (remote ns)...")
    check_dev_info(False, ns)

    start_test("Test bpftool bound info reporting (back to own ns)...")
    sim.set_ns("")
    check_dev_info(False, "")

    prog_file, _ = pin_prog("/sys/fs/bpf/tmp_prog")
    map_file, _ = pin_map("/sys/fs/bpf/tmp_map", idx=1, expected=2)
    simdev.remove()

    start_test("Test bpftool bound info reporting (removed dev)...")
    check_dev_info_removed(prog_file=prog_file, map_file=map_file)

    # Remove all pinned files and reinstantiate the netdev
    clean_up()
    bpftool_prog_list_wait(expected=0)

    simdev = NetdevSimDev()
    sim, = simdev.nsims

    start_test("Test map update (no flags)...")
    sim.set_xdp(map_obj, "offload", JSON=False) # map fixup msg breaks JSON
    maps = bpftool_map_list(expected=2)
    array = maps[0] if maps[0]["type"] == "array" else maps[1]
    htab = maps[0] if maps[0]["type"] == "hash" else maps[1]
    for m in maps:
        for i in range(2):
            bpftool("map update id %d key %s value %s" %
                    (m["id"], int2str("I", i), int2str("Q", i * 3)))

    for m in maps:
        ret, _ = bpftool("map update id %d key %s value %s" %
                         (m["id"], int2str("I", 3), int2str("Q", 3 * 3)),
                         fail=False)
        fail(ret == 0, "added too many entries")

    start_test("Test map update (exists)...")
    for m in maps:
        for i in range(2):
            bpftool("map update id %d key %s value %s exist" %
                    (m["id"], int2str("I", i), int2str("Q", i * 3)))

    for m in maps:
        ret, err = bpftool("map update id %d key %s value %s exist" %
                           (m["id"], int2str("I", 3), int2str("Q", 3 * 3)),
                           fail=False)
        fail(ret == 0, "updated non-existing key")
        fail(err["error"].find("No such file or directory") == -1,
             "expected ENOENT, error is '%s'" % (err["error"]))

    start_test("Test map update (noexist)...")
    for m in maps:
        for i in range(2):
            ret, err = bpftool("map update id %d key %s value %s noexist" %
                               (m["id"], int2str("I", i), int2str("Q", i * 3)),
                               fail=False)
        fail(ret == 0, "updated existing key")
        fail(err["error"].find("File exists") == -1,
             "expected EEXIST, error is '%s'" % (err["error"]))

    start_test("Test map dump...")
    for m in maps:
        _, entries = bpftool("map dump id %d" % (m["id"]))
        for i in range(2):
            key = str2int(entries[i]["key"])
            fail(key != i, "expected key %d, got %d" % (key, i))
            val = str2int(entries[i]["value"])
            fail(val != i * 3, "expected value %d, got %d" % (val, i * 3))

    start_test("Test map getnext...")
    for m in maps:
        _, entry = bpftool("map getnext id %d" % (m["id"]))
        key = str2int(entry["next_key"])
        fail(key != 0, "next key %d, expected %d" % (key, 0))
        _, entry = bpftool("map getnext id %d key %s" %
                           (m["id"], int2str("I", 0)))
        key = str2int(entry["next_key"])
        fail(key != 1, "next key %d, expected %d" % (key, 1))
        ret, err = bpftool("map getnext id %d key %s" %
                           (m["id"], int2str("I", 1)), fail=False)
        fail(ret == 0, "got next key past the end of map")
        fail(err["error"].find("No such file or directory") == -1,
             "expected ENOENT, error is '%s'" % (err["error"]))

    start_test("Test map delete (htab)...")
    for i in range(2):
        bpftool("map delete id %d key %s" % (htab["id"], int2str("I", i)))

    start_test("Test map delete (array)...")
    for i in range(2):
        ret, err = bpftool("map delete id %d key %s" %
                           (htab["id"], int2str("I", i)), fail=False)
        fail(ret == 0, "removed entry from an array")
        fail(err["error"].find("No such file or directory") == -1,
             "expected ENOENT, error is '%s'" % (err["error"]))

    start_test("Test map remove...")
    sim.unset_xdp("offload")
    bpftool_map_list_wait(expected=0)
    simdev.remove()

    simdev = NetdevSimDev()
    sim, = simdev.nsims
    sim.set_xdp(map_obj, "offload", JSON=False) # map fixup msg breaks JSON
    simdev.remove()
    bpftool_map_list_wait(expected=0)

    start_test("Test map creation fail path...")
    simdev = NetdevSimDev()
    sim, = simdev.nsims
    sim.dfs["bpf_map_accept"] = "N"
    ret, _ = sim.set_xdp(map_obj, "offload", JSON=False, fail=False)
    fail(ret == 0,
         "netdevsim didn't refuse to create a map with offload disabled")

    simdev.remove()

    start_test("Test multi-dev ASIC program reuse...")
    simdevA = NetdevSimDev()
    simA, = simdevA.nsims
    simdevB = NetdevSimDev(3)
    simB1, simB2, simB3 = simdevB.nsims
    sims = (simA, simB1, simB2, simB3)
    simB = (simB1, simB2, simB3)

    bpftool_prog_load("sample_map_ret0.o", "/sys/fs/bpf/nsimA",
                      dev=simA['ifname'])
    progA = bpf_pinned("/sys/fs/bpf/nsimA")
    bpftool_prog_load("sample_map_ret0.o", "/sys/fs/bpf/nsimB",
                      dev=simB1['ifname'])
    progB = bpf_pinned("/sys/fs/bpf/nsimB")

    simA.set_xdp(progA, "offload", JSON=False)
    for d in simdevB.nsims:
        d.set_xdp(progB, "offload", JSON=False)

    start_test("Test multi-dev ASIC cross-dev replace...")
    ret, _ = simA.set_xdp(progB, "offload", force=True, JSON=False, fail=False)
    fail(ret == 0, "cross-ASIC program allowed")
    for d in simdevB.nsims:
        ret, _ = d.set_xdp(progA, "offload", force=True, JSON=False, fail=False)
        fail(ret == 0, "cross-ASIC program allowed")

    start_test("Test multi-dev ASIC cross-dev install...")
    for d in sims:
        d.unset_xdp("offload")

    ret, _, err = simA.set_xdp(progB, "offload", force=True, JSON=False,
                               fail=False, include_stderr=True)
    fail(ret == 0, "cross-ASIC program allowed")
    check_extack_nsim(err, "program bound to different dev.", args)
    for d in simdevB.nsims:
        ret, _, err = d.set_xdp(progA, "offload", force=True, JSON=False,
                                fail=False, include_stderr=True)
        fail(ret == 0, "cross-ASIC program allowed")
        check_extack_nsim(err, "program bound to different dev.", args)

    start_test("Test multi-dev ASIC cross-dev map reuse...")

    mapA = bpftool("prog show %s" % (progA))[1]["map_ids"][0]
    mapB = bpftool("prog show %s" % (progB))[1]["map_ids"][0]

    ret, _ = bpftool_prog_load("sample_map_ret0.o", "/sys/fs/bpf/nsimB_",
                               dev=simB3['ifname'],
                               maps=["idx 0 id %d" % (mapB)],
                               fail=False)
    fail(ret != 0, "couldn't reuse a map on the same ASIC")
    rm("/sys/fs/bpf/nsimB_")

    ret, _, err = bpftool_prog_load("sample_map_ret0.o", "/sys/fs/bpf/nsimA_",
                                    dev=simA['ifname'],
                                    maps=["idx 0 id %d" % (mapB)],
                                    fail=False, include_stderr=True)
    fail(ret == 0, "could reuse a map on a different ASIC")
    fail(err.count("offload device mismatch between prog and map") == 0,
         "error message missing for cross-ASIC map")

    ret, _, err = bpftool_prog_load("sample_map_ret0.o", "/sys/fs/bpf/nsimB_",
                                    dev=simB1['ifname'],
                                    maps=["idx 0 id %d" % (mapA)],
                                    fail=False, include_stderr=True)
    fail(ret == 0, "could reuse a map on a different ASIC")
    fail(err.count("offload device mismatch between prog and map") == 0,
         "error message missing for cross-ASIC map")

    start_test("Test multi-dev ASIC cross-dev destruction...")
    bpftool_prog_list_wait(expected=2)

    simdevA.remove()
    bpftool_prog_list_wait(expected=1)

    ifnameB = bpftool("prog show %s" % (progB))[1]["dev"]["ifname"]
    fail(ifnameB != simB1['ifname'], "program not bound to original device")
    simB1.remove()
    bpftool_prog_list_wait(expected=1)

    start_test("Test multi-dev ASIC cross-dev destruction - move...")
    ifnameB = bpftool("prog show %s" % (progB))[1]["dev"]["ifname"]
    fail(ifnameB not in (simB2['ifname'], simB3['ifname']),
         "program not bound to remaining devices")

    simB2.remove()
    ifnameB = bpftool("prog show %s" % (progB))[1]["dev"]["ifname"]
    fail(ifnameB != simB3['ifname'], "program not bound to remaining device")

    simB3.remove()
    simdevB.remove()
    bpftool_prog_list_wait(expected=0)

    start_test("Test multi-dev ASIC cross-dev destruction - orphaned...")
    ret, out = bpftool("prog show %s" % (progB), fail=False)
    fail(ret == 0, "got information about orphaned program")
    fail("error" not in out, "no error reported for get info on orphaned")
    fail(out["error"] != "can't get prog info: No such device",
         "wrong error for get info on orphaned")

    print("%s: OK" % (os.path.basename(__file__)))

finally:
    log("Clean up...", "", level=1)
    log_level_inc()
    clean_up()