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c0375944d9
Add a selftest for the protodown mechanism.
Five test cases are included:
1. Basic protodown toggling: Verify that setting protodown on macvlan
results in DOWN operational state and clearing it restores UP.
2. Same as the previous test case, but with vxlan.
3. Protodown reasons: Verify that protodown cannot be cleared while
there are active protodown reasons, but can be cleared once all
reasons are removed.
4. Protodown with lower device being toggled: Verify that toggling the
lower device's carrier while protodown is on does not cause the
macvlan to gain carrier.
5. Protodown with lower device down: Verify that toggling protodown
while the lower device has no carrier does not cause the macvlan to
gain carrier.
Note that the last two test cases fail without "net: Do not turn on
carrier when protodown is on" and "net: Do not unconditionally turn on
carrier when turning off protodown":
# ./protodown.sh
TEST: Basic protodown on/off with macvlan [ OK ]
TEST: Basic protodown on/off with vxlan [ OK ]
TEST: Protodown reasons [ OK ]
TEST: Protodown with lower device toggled [FAIL]
Macvlan operational state is not DOWN despite protodown
TEST: Protodown with lower device down [FAIL]
Macvlan is not LOWERLAYERDOWN after clearing protodown
Assisted-by: Claude:claude-opus-4-6
Signed-off-by: Ido Schimmel <idosch@nvidia.com>
Link: https://patch.msgid.link/20260507105906.891817-5-idosch@nvidia.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
183 lines
4.7 KiB
Bash
Executable File
183 lines
4.7 KiB
Bash
Executable File
#!/bin/bash
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# SPDX-License-Identifier: GPL-2.0
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#
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# Test the protodown mechanism. Verify basic protodown toggling, protodown
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# reasons, operational state when the lower device carrier changes, and correct
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# operational state when the lower device has no carrier.
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# shellcheck disable=SC1091,SC2034,SC2154,SC2317
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source lib.sh
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require_command jq
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ALL_TESTS="
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protodown_basic_macvlan
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protodown_basic_vxlan
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protodown_reasons
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protodown_lower_toggle
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protodown_lower_down
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"
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operstate_get()
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{
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local ns=$1; shift
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local dev=$1; shift
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ip -n "$ns" -j link show dev "$dev" | jq -r '.[].operstate'
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}
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operstate_check()
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{
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local ns=$1; shift
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local dev=$1; shift
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local expected=$1; shift
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local current
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current=$(operstate_get "$ns" "$dev")
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[ "$current" = "$expected" ]
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}
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setup_prepare()
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{
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setup_ns NS
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defer cleanup_all_ns
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ip -n "$NS" link add name dummy0 up type dummy
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ip -n "$NS" link add name macvlan0 link dummy0 up type macvlan mode bridge
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ip -n "$NS" link add name vxlan0 up type vxlan id 10010 dstport 4789
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}
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protodown_basic()
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{
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local dev=$1; shift
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ip -n "$NS" link set dev "$dev" protodown on
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check_err $? "Failed to set protodown on"
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busywait "$BUSYWAIT_TIMEOUT" operstate_check "$NS" "$dev" DOWN
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check_err $? "Operational state is not DOWN after setting protodown"
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ip -n "$NS" link set dev "$dev" protodown off
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check_err $? "Failed to set protodown off"
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busywait "$BUSYWAIT_TIMEOUT" operstate_check "$NS" "$dev" UP
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check_err $? "Operational state is not UP after clearing protodown"
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}
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protodown_basic_macvlan()
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{
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RET=0
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protodown_basic macvlan0
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log_test "Basic protodown on/off with macvlan"
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}
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protodown_basic_vxlan()
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{
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RET=0
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protodown_basic vxlan0
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log_test "Basic protodown on/off with vxlan"
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}
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protodown_reasons()
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{
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RET=0
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ip -n "$NS" link set dev macvlan0 protodown on
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ip -n "$NS" link set dev macvlan0 protodown_reason 0 on
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check_err $? "Failed to set protodown reason bit 0"
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# Cannot clear protodown while reasons are active.
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ip -n "$NS" link set dev macvlan0 protodown off 2>/dev/null
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check_fail $? "Clearing protodown succeeded with active reasons"
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ip -n "$NS" link set dev macvlan0 protodown_reason 0 off
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check_err $? "Failed to clear protodown reason bit 0"
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# Can clear protodown when no reasons are active.
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ip -n "$NS" link set dev macvlan0 protodown off
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check_err $? "Failed to clear protodown with no active reasons"
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busywait "$BUSYWAIT_TIMEOUT" operstate_check "$NS" macvlan0 UP
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check_err $? "Operational state is not UP after clearing protodown"
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log_test "Protodown reasons"
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}
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protodown_lower_toggle()
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{
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RET=0
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ip -n "$NS" link set dev macvlan0 protodown on
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busywait "$BUSYWAIT_TIMEOUT" operstate_check "$NS" macvlan0 DOWN
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check_err $? "Operational state is not DOWN after setting protodown"
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# Toggle carrier on the lower device. The macvlan should stay DOWN
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# because protodown is on.
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ip -n "$NS" link set dev dummy0 carrier off
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ip -n "$NS" link set dev dummy0 carrier on
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busywait "$BUSYWAIT_TIMEOUT" operstate_check "$NS" dummy0 UP
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check_err $? "Lower device is not UP after carrier on"
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busywait "$BUSYWAIT_TIMEOUT" operstate_check "$NS" macvlan0 DOWN
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check_err $? "Macvlan operational state is not DOWN despite protodown"
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# Clear protodown and verify the macvlan comes back up.
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ip -n "$NS" link set dev macvlan0 protodown off
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busywait "$BUSYWAIT_TIMEOUT" operstate_check "$NS" macvlan0 UP
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check_err $? "Operational state is not UP after clearing protodown"
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log_test "Protodown with lower device toggled"
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}
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protodown_lower_down()
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{
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RET=0
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# Bring the lower device carrier down first.
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ip -n "$NS" link set dev dummy0 carrier off
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busywait "$BUSYWAIT_TIMEOUT" operstate_check "$NS" macvlan0 LOWERLAYERDOWN
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check_err $? "Macvlan is not LOWERLAYERDOWN with lower carrier off"
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# Toggle protodown on and off while lower has no carrier. The macvlan
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# should not transition to UP.
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ip -n "$NS" link set dev macvlan0 protodown on
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busywait "$BUSYWAIT_TIMEOUT" operstate_check "$NS" macvlan0 LOWERLAYERDOWN
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check_err $? "Macvlan is not LOWERLAYERDOWN after setting protodown"
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ip -n "$NS" link set dev macvlan0 protodown off
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busywait "$BUSYWAIT_TIMEOUT" operstate_check "$NS" macvlan0 LOWERLAYERDOWN
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check_err $? "Macvlan is not LOWERLAYERDOWN after clearing protodown"
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# Bring the lower device carrier up. The macvlan should transition to
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# UP.
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ip -n "$NS" link set dev dummy0 carrier on
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busywait "$BUSYWAIT_TIMEOUT" operstate_check "$NS" dummy0 UP
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check_err $? "Lower device is not UP after carrier on"
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busywait "$BUSYWAIT_TIMEOUT" operstate_check "$NS" macvlan0 UP
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check_err $? "Macvlan is not UP after lower device is UP"
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log_test "Protodown with lower device down"
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}
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trap defer_scopes_cleanup EXIT
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setup_prepare
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tests_run
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exit "$EXIT_STATUS"
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