mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
synced 2026-06-11 05:55:28 -04:00
e8c87c643e
the following script:
# tc qdisc add dev crash0 clsact
# tc filter add dev crash0 egress matchall \
> action sample rate 1024 group 4 pass index 90
# tc actions replace action sample \
> rate 1024 group 4 goto chain 42 index 90 cookie c1a0c1a0
# tc actions show action sample
had the following output:
Error: Failed to init TC action chain.
We have an error talking to the kernel
total acts 1
action order 0: sample rate 1/1024 group 4 goto chain 42
index 90 ref 2 bind 1
cookie c1a0c1a0
Then, the first packet transmitted by crash0 made the kernel crash:
BUG: unable to handle kernel NULL pointer dereference at 0000000000000000
#PF error: [normal kernel read fault]
PGD 8000000079966067 P4D 8000000079966067 PUD 7987b067 PMD 0
Oops: 0000 [#1] SMP PTI
CPU: 0 PID: 5 Comm: kworker/0:0 Not tainted 5.0.0-rc4.gotochain_crash+ #536
Hardware name: Red Hat KVM, BIOS 0.5.1 01/01/2011
Workqueue: ipv6_addrconf addrconf_dad_work
RIP: 0010:tcf_action_exec+0xb8/0x100
Code: 00 00 00 20 74 1d 83 f8 03 75 09 49 83 c4 08 4d 39 ec 75 bc 48 83 c4 10 5b 5d 41 5c 41 5d 41 5e 41 5f c3 49 8b 97 a8 00 00 00 <48> 8b 12 48 89 55 00 48 83 c4 10 5b 5d 41 5c 41 5d 41 5e 41 5f c3
RSP: 0018:ffffbee60033fad0 EFLAGS: 00010246
RAX: 000000002000002a RBX: ffff99d7ae6e3b00 RCX: 00000000e555df9b
RDX: 0000000000000000 RSI: 00000000b0352718 RDI: ffff99d7fda1fcf0
RBP: ffffbee60033fb70 R08: 0000000070731ab1 R09: 0000000000000400
R10: 0000000000000000 R11: ffff99d7ac733838 R12: ffff99d7f3c2be00
R13: ffff99d7f3c2be08 R14: 0000000000000001 R15: ffff99d7f3c2b600
FS: 0000000000000000(0000) GS:ffff99d7fda00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000000 CR3: 00000000797de006 CR4: 00000000001606f0
Call Trace:
tcf_classify+0x58/0x120
__dev_queue_xmit+0x40a/0x890
? ndisc_next_option+0x50/0x50
? ___neigh_create+0x4d5/0x680
? ip6_finish_output2+0x1b5/0x590
ip6_finish_output2+0x1b5/0x590
? ip6_output+0x68/0x110
ip6_output+0x68/0x110
? nf_hook.constprop.28+0x79/0xc0
ndisc_send_skb+0x248/0x2e0
ndisc_send_ns+0xf8/0x200
? addrconf_dad_work+0x389/0x4b0
addrconf_dad_work+0x389/0x4b0
? __switch_to_asm+0x34/0x70
? process_one_work+0x195/0x380
? addrconf_dad_completed+0x370/0x370
process_one_work+0x195/0x380
worker_thread+0x30/0x390
? process_one_work+0x380/0x380
kthread+0x113/0x130
? kthread_park+0x90/0x90
ret_from_fork+0x35/0x40
Modules linked in: act_sample psample veth ip6table_filter ip6_tables iptable_filter binfmt_misc ext4 crct10dif_pclmul crc32_pclmul ghash_clmulni_intel mbcache jbd2 snd_hda_codec_generic snd_hda_intel snd_hda_codec snd_hwdep snd_hda_core snd_seq snd_seq_device aesni_intel crypto_simd snd_pcm cryptd glue_helper snd_timer joydev snd pcspkr virtio_balloon i2c_piix4 soundcore nfsd auth_rpcgss nfs_acl lockd grace sunrpc ip_tables xfs ata_generic pata_acpi qxl drm_kms_helper syscopyarea sysfillrect virtio_net sysimgblt fb_sys_fops net_failover ttm failover virtio_blk virtio_console drm ata_piix serio_raw crc32c_intel libata virtio_pci virtio_ring virtio floppy dm_mirror dm_region_hash dm_log dm_mod
CR2: 0000000000000000
Validating the control action within tcf_sample_init() proved to fix the
above issue. A TDC selftest is added to verify the correct behavior.
Fixes: db50514f9a ("net: sched: add termination action to allow goto chain")
Fixes: 97763dc0f4 ("net_sched: reject unknown tcfa_action values")
Signed-off-by: Davide Caratti <dcaratti@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
614 lines
18 KiB
JSON
614 lines
18 KiB
JSON
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"id": "1886",
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"name": "Add valid sample action with mandatory arguments and jump control action",
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"matchPattern": "action order [0-9]+: sample rate 1/700 group 25 jump 4.*index 200 ref",
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"expExitCode": "255",
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"verifyCmd": "$TC actions list action sample",
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"cmdUnderTest": "$TC actions add action sample group 10 index 1",
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{
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"id": "4203",
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"category": [
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],
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"cmdUnderTest": "$TC actions add action sample rate 100 index 10",
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"verifyCmd": "$TC actions get action sample index 10",
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{
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"id": "14a7",
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"name": "Add invalid sample action without mandatory argument group",
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"category": [
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},
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{
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"id": "8f2e",
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"name": "Add valid sample action with trunc argument",
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"actions",
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"cmdUnderTest": "$TC actions add action sample rate 1024 group 4 trunc 1024 index 10",
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"expExitCode": "0",
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"verifyCmd": "$TC actions get action sample index 10",
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"matchPattern": "action order [0-9]+: sample rate 1/1024 group 4 trunc_size 1024 pipe.*index 10 ref",
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"$TC actions flush action sample"
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]
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},
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{
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"id": "45f8",
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"name": "Add sample action with maximum rate argument",
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"category": [
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"actions",
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"sample"
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],
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"setup": [
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255
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]
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],
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"cmdUnderTest": "$TC actions add action sample rate 4294967295 group 4 index 10",
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"expExitCode": "0",
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"verifyCmd": "$TC actions get action sample index 10",
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"matchPattern": "action order [0-9]+: sample rate 1/4294967295 group 4 pipe.*index 10 ref",
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"matchCount": "1",
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"teardown": [
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"$TC actions flush action sample"
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]
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},
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{
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"id": "ad0c",
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"name": "Add sample action with maximum trunc argument",
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"category": [
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"actions",
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"sample"
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],
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"setup": [
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"$TC actions flush action sample",
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0,
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1,
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255
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]
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],
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"cmdUnderTest": "$TC actions add action sample rate 16000 group 4 trunc 4294967295 index 10",
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"expExitCode": "0",
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"verifyCmd": "$TC actions get action sample index 10",
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"matchPattern": "action order [0-9]+: sample rate 1/16000 group 4 trunc_size 4294967295 pipe.*index 10 ref",
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"matchCount": "1",
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"teardown": [
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"$TC actions flush action sample"
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]
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},
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{
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"id": "83a9",
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"name": "Add sample action with maximum group argument",
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"category": [
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"actions",
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"sample"
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],
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"setup": [
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[
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"$TC actions flush action sample",
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0,
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1,
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255
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]
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],
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"cmdUnderTest": "$TC actions add action sample rate 4294 group 4294967295 index 1",
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"expExitCode": "0",
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"verifyCmd": "$TC actions get action sample index 1",
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"matchPattern": "action order [0-9]+: sample rate 1/4294 group 4294967295 pipe.*index 1 ref",
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"matchCount": "1",
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"teardown": [
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"$TC actions flush action sample"
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]
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},
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{
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"id": "ed27",
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"name": "Add sample action with invalid rate argument",
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"category": [
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"actions",
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"sample"
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],
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"setup": [
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[
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"$TC actions flush action sample",
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0,
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255
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]
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],
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"cmdUnderTest": "$TC actions add action sample rate 4294967296 group 4 index 10",
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"expExitCode": "255",
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"verifyCmd": "$TC actions get action sample index 10",
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"matchPattern": "action order [0-9]+: sample rate 1/4294967296 group 4 pipe.*index 10 ref",
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"matchCount": "0",
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"teardown": []
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},
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{
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"id": "2eae",
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"name": "Add sample action with invalid group argument",
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"category": [
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"actions",
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"sample"
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],
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"setup": [
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0,
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255
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]
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],
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"cmdUnderTest": "$TC actions add action sample rate 4098 group 5294967299 continue index 1",
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"expExitCode": "255",
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"verifyCmd": "$TC actions get action sample index 1",
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"matchPattern": "action order [0-9]+: sample rate 1/4098 group 5294967299 continue.*index 1 ref",
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"matchCount": "0",
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"teardown": []
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},
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{
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"id": "6ff3",
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"name": "Add sample action with invalid trunc size",
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"category": [
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"actions",
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"sample"
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],
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"setup": [
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0,
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1,
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255
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]
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],
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"cmdUnderTest": "$TC actions add action sample rate 1024 group 4 trunc 112233445566 index 11",
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"expExitCode": "255",
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"verifyCmd": "$TC actions get action sample index 11",
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"matchPattern": "action order [0-9]+: sample rate 1/1024 group 4 trunc_size 112233445566.*index 11 ref",
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"matchCount": "0",
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"teardown": []
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},
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{
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"id": "2b2a",
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"name": "Add sample action with invalid index",
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"category": [
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"actions",
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"sample"
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],
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"setup": [
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[
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"$TC actions flush action sample",
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0,
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1,
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255
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]
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],
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"cmdUnderTest": "$TC actions add action sample rate 1024 group 4 index 5294967299",
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"expExitCode": "255",
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"verifyCmd": "$TC actions get action sample index 5294967299",
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"matchPattern": "action order [0-9]+: sample rate 1/1024 group 4 pipe.*index 5294967299 ref",
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"matchCount": "0",
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"teardown": []
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},
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{
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"id": "dee2",
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"name": "Add sample action with maximum allowed index",
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"category": [
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"actions",
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"sample"
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],
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"setup": [
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[
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"$TC actions flush action sample",
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0,
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1,
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255
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]
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],
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"cmdUnderTest": "$TC actions add action sample rate 1024 group 4 index 4294967295",
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"expExitCode": "0",
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"verifyCmd": "$TC actions get action sample index 4294967295",
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"matchPattern": "action order [0-9]+: sample rate 1/1024 group 4 pipe.*index 4294967295 ref",
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"matchCount": "1",
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"teardown": [
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"$TC actions flush action sample"
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]
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},
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{
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"id": "560e",
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"name": "Add sample action with cookie",
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"category": [
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"actions",
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"sample"
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],
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"setup": [
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[
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"$TC actions flush action sample",
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0,
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1,
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255
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|
]
|
|
],
|
|
"cmdUnderTest": "$TC actions add action sample rate 1024 group 4 index 45 cookie aabbccdd",
|
|
"expExitCode": "0",
|
|
"verifyCmd": "$TC actions get action sample index 45",
|
|
"matchPattern": "action order [0-9]+: sample rate 1/1024 group 4 pipe.*index 45.*cookie aabbccdd",
|
|
"matchCount": "1",
|
|
"teardown": [
|
|
"$TC actions flush action sample"
|
|
]
|
|
},
|
|
{
|
|
"id": "704a",
|
|
"name": "Replace existing sample action with new rate argument",
|
|
"category": [
|
|
"actions",
|
|
"sample"
|
|
],
|
|
"setup": [
|
|
[
|
|
"$TC actions flush action sample",
|
|
0,
|
|
1,
|
|
255
|
|
],
|
|
"$TC actions add action sample rate 1024 group 4 index 4"
|
|
],
|
|
"cmdUnderTest": "$TC actions replace action sample rate 2048 group 4 index 4",
|
|
"expExitCode": "0",
|
|
"verifyCmd": "$TC actions list action sample",
|
|
"matchPattern": "action order [0-9]+: sample rate 1/2048 group 4 pipe.*index 4",
|
|
"matchCount": "1",
|
|
"teardown": [
|
|
"$TC actions flush action sample"
|
|
]
|
|
},
|
|
{
|
|
"id": "60eb",
|
|
"name": "Replace existing sample action with new group argument",
|
|
"category": [
|
|
"actions",
|
|
"sample"
|
|
],
|
|
"setup": [
|
|
[
|
|
"$TC actions flush action sample",
|
|
0,
|
|
1,
|
|
255
|
|
],
|
|
"$TC actions add action sample rate 1024 group 4 index 4"
|
|
],
|
|
"cmdUnderTest": "$TC actions replace action sample rate 1024 group 7 index 4",
|
|
"expExitCode": "0",
|
|
"verifyCmd": "$TC actions list action sample",
|
|
"matchPattern": "action order [0-9]+: sample rate 1/1024 group 7 pipe.*index 4",
|
|
"matchCount": "1",
|
|
"teardown": [
|
|
"$TC actions flush action sample"
|
|
]
|
|
},
|
|
{
|
|
"id": "2cce",
|
|
"name": "Replace existing sample action with new trunc argument",
|
|
"category": [
|
|
"actions",
|
|
"sample"
|
|
],
|
|
"setup": [
|
|
[
|
|
"$TC actions flush action sample",
|
|
0,
|
|
1,
|
|
255
|
|
],
|
|
"$TC actions add action sample rate 1024 group 4 trunc 48 index 4"
|
|
],
|
|
"cmdUnderTest": "$TC actions replace action sample rate 1024 group 7 trunc 64 index 4",
|
|
"expExitCode": "0",
|
|
"verifyCmd": "$TC actions list action sample",
|
|
"matchPattern": "action order [0-9]+: sample rate 1/1024 group 7 trunc_size 64 pipe.*index 4",
|
|
"matchCount": "1",
|
|
"teardown": [
|
|
"$TC actions flush action sample"
|
|
]
|
|
},
|
|
{
|
|
"id": "59d1",
|
|
"name": "Replace existing sample action with new control argument",
|
|
"category": [
|
|
"actions",
|
|
"sample"
|
|
],
|
|
"setup": [
|
|
[
|
|
"$TC actions flush action sample",
|
|
0,
|
|
1,
|
|
255
|
|
],
|
|
"$TC actions add action sample rate 1024 group 4 reclassify index 4"
|
|
],
|
|
"cmdUnderTest": "$TC actions replace action sample rate 1024 group 7 pipe index 4",
|
|
"expExitCode": "0",
|
|
"verifyCmd": "$TC actions list action sample",
|
|
"matchPattern": "action order [0-9]+: sample rate 1/1024 group 7 pipe.*index 4",
|
|
"matchCount": "1",
|
|
"teardown": [
|
|
"$TC actions flush action sample"
|
|
]
|
|
},
|
|
{
|
|
"id": "0a6e",
|
|
"name": "Replace sample action with invalid goto chain control",
|
|
"category": [
|
|
"actions",
|
|
"sample"
|
|
],
|
|
"setup": [
|
|
[
|
|
"$TC actions flush action sample",
|
|
0,
|
|
1,
|
|
255
|
|
],
|
|
"$TC actions add action sample rate 1024 group 4 pass index 90"
|
|
],
|
|
"cmdUnderTest": "$TC actions replace action sample rate 1024 group 7 goto chain 42 index 90 cookie c1a0c1a0",
|
|
"expExitCode": "255",
|
|
"verifyCmd": "$TC actions list action sample",
|
|
"matchPattern": "action order [0-9]+: sample rate 1/1024 group 4 pass.*index 90",
|
|
"matchCount": "1",
|
|
"teardown": [
|
|
"$TC actions flush action sample"
|
|
]
|
|
}
|
|
]
|