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selftests: tc-testing: u32: Add tests covering sample option

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Kernel's key folding basically consists of shifting away least
significant zero bits in mask and masking the resulting value with
(divisor - 1). Test for u32's 'sample' option to behave identical.

Suggested-by: Jamal Hadi Salim <jhs@mojatatu.com>
Signed-off-by: Phil Sutter <phil@nwl.cc>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Phil Sutter 2021-02-08 16:10:04 +01:00 committed by David S. Miller
parent 1a9b86c9fd
commit 373e13bc63
1 changed files with 46 additions and 0 deletions
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46
tools/testing/selftests/tc-testing/tc-tests/filters/u32.json
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@ -201,5 +201,51 @@
"teardown": [
"$TC qdisc del dev $DEV1 ingress"
]
},
{
"id": "0692",
"name": "Test u32 sample option, divisor 256",
"category": [
"filter",
"u32"
],
"plugins": {
"requires": "nsPlugin"
},
"setup": [
"$TC qdisc add dev $DEV1 ingress",
"$TC filter add dev $DEV1 ingress prio 99 handle 1: u32 divisor 256"
],
"cmdUnderTest": "bash -c \"for mask in ff ffff ffffff ffffffff ff00ff ff0000ff ffff00ff; do $TC filter add dev $DEV1 ingress prio 99 u32 ht 1: sample u32 0x10203040 \\$mask match u8 0 0 classid 1:1; done\"",
"expExitCode": "0",
"verifyCmd": "$TC filter show dev $DEV1 ingress",
"matchPattern": "filter protocol all pref 99 u32( (chain|fh|order) [0-9:]+){3} key ht 1 bkt 40 flowid 1:1",
"matchCount": "7",
"teardown": [
"$TC qdisc del dev $DEV1 ingress"
]
},
{
"id": "2478",
"name": "Test u32 sample option, divisor 16",
"category": [
"filter",
"u32"
],
"plugins": {
"requires": "nsPlugin"
},
"setup": [
"$TC qdisc add dev $DEV1 ingress",
"$TC filter add dev $DEV1 ingress prio 99 handle 1: u32 divisor 256"
],
"cmdUnderTest": "bash -c \"for mask in 70 f0 ff0 fff0 ff00f0; do $TC filter add dev $DEV1 ingress prio 99 u32 ht 1: sample u32 0x10203040 \\$mask match u8 0 0 classid 1:1; done\"",
"expExitCode": "0",
"verifyCmd": "$TC filter show dev $DEV1 ingress",
"matchPattern": "filter protocol all pref 99 u32( (chain|fh|order) [0-9:]+){3} key ht 1 bkt 4 flowid 1:1",
"matchCount": "5",
"teardown": [
"$TC qdisc del dev $DEV1 ingress"
]
}
]