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linux/tools/testing/selftests/net/forwarding/tc_common.sh
Petr Machata fa61e9aec9 selftests: net: libs: Change variable fallback syntax
The current syntax of X=${X:=X} first evaluates the ${X:=Y} expression,
which either uses the existing value of $X if there is one, or uses the
value of "Y" as a fallback, and assigns it to X. The expression is then
replaced with the now-current value of $X. Assigning that value to X once
more is meaningless.

So avoid the outer X=... bit, and instead express the same idea though the
do-nothing ":" built-in as : "${X:=Y}". This also cleans up the block
nicely and makes it more readable.

Signed-off-by: Petr Machata <petrm@nvidia.com>
Reviewed-by: Benjamin Poirier <bpoirier@nvidia.com>
Link: https://lore.kernel.org/r/1890ddc58420c2c0d5ba3154c87ecc6d9faf6947.1711464583.git.petrm@nvidia.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2024-03-28 18:03:41 -07:00

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#!/bin/bash
# SPDX-License-Identifier: GPL-2.0
CHECK_TC="yes"
# Can be overridden by the configuration file. See lib.sh
: "${TC_HIT_TIMEOUT:=1000}" # ms
tc_check_packets()
{
local id=$1
local handle=$2
local count=$3
busywait "$TC_HIT_TIMEOUT" until_counter_is "== $count" \
tc_rule_handle_stats_get "$id" "$handle" > /dev/null
}
tc_check_at_least_x_packets()
{
local id=$1
local handle=$2
local count=$3
busywait "$TC_HIT_TIMEOUT" until_counter_is ">= $count" \
tc_rule_handle_stats_get "$id" "$handle" > /dev/null
}
tc_check_packets_hitting()
{
local id=$1
local handle=$2
busywait "$TC_HIT_TIMEOUT" until_counter_is "> 0" \
tc_rule_handle_stats_get "$id" "$handle" > /dev/null
}