#!/bin/bash
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# SPDX-License-Identifier: GPL-2.0
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# This test is for checking the A-TCAM and C-TCAM operation in Spectrum-2.
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# It tries to exercise as many code paths in the eRP state machine as
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# possible.
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lib_dir=$(dirname $0)/../../../../net/forwarding
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ALL_TESTS="single_mask_test identical_filters_test two_masks_test \
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multiple_masks_test ctcam_edge_cases_test"
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NUM_NETIFS=2
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source $lib_dir/tc_common.sh
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source $lib_dir/lib.sh
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tcflags="skip_hw"
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h1_create()
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{
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simple_if_init $h1 192.0.2.1/24 198.51.100.1/24
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}
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h1_destroy()
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{
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simple_if_fini $h1 192.0.2.1/24 198.51.100.1/24
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}
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h2_create()
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{
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simple_if_init $h2 192.0.2.2/24 198.51.100.2/24
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tc qdisc add dev $h2 clsact
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}
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h2_destroy()
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{
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tc qdisc del dev $h2 clsact
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simple_if_fini $h2 192.0.2.2/24 198.51.100.2/24
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}
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single_mask_test()
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{
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# When only a single mask is required, the device uses the master
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# mask and not the eRP table. Verify that under this mode the right
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# filter is matched
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RET=0
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tc filter add dev $h2 ingress protocol ip pref 1 handle 101 flower \
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$tcflags dst_ip 192.0.2.2 action drop
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$MZ $h1 -c 1 -p 64 -a $h1mac -b $h2mac -A 192.0.2.1 -B 192.0.2.2 \
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-t ip -q
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tc_check_packets "dev $h2 ingress" 101 1
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check_err $? "Single filter - did not match"
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tc filter add dev $h2 ingress protocol ip pref 2 handle 102 flower \
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$tcflags dst_ip 198.51.100.2 action drop
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$MZ $h1 -c 1 -p 64 -a $h1mac -b $h2mac -A 192.0.2.1 -B 192.0.2.2 \
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-t ip -q
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tc_check_packets "dev $h2 ingress" 101 2
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check_err $? "Two filters - did not match highest priority"
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$MZ $h1 -c 1 -p 64 -a $h1mac -b $h2mac -A 198.51.100.1 -B 198.51.100.2 \
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-t ip -q
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tc_check_packets "dev $h2 ingress" 102 1
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check_err $? "Two filters - did not match lowest priority"
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tc filter del dev $h2 ingress protocol ip pref 1 handle 101 flower
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$MZ $h1 -c 1 -p 64 -a $h1mac -b $h2mac -A 198.51.100.1 -B 198.51.100.2 \
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-t ip -q
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tc_check_packets "dev $h2 ingress" 102 2
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check_err $? "Single filter - did not match after delete"
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tc filter del dev $h2 ingress protocol ip pref 2 handle 102 flower
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log_test "single mask test ($tcflags)"
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}
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identical_filters_test()
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{
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# When two filters that only differ in their priority are used,
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# one needs to be inserted into the C-TCAM. This test verifies
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# that filters are correctly spilled to C-TCAM and that the right
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# filter is matched
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RET=0
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tc filter add dev $h2 ingress protocol ip pref 1 handle 101 flower \
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$tcflags dst_ip 192.0.2.2 action drop
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tc filter add dev $h2 ingress protocol ip pref 2 handle 102 flower \
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$tcflags dst_ip 192.0.2.2 action drop
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$MZ $h1 -c 1 -p 64 -a $h1mac -b $h2mac -A 192.0.2.1 -B 192.0.2.2 \
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-t ip -q
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tc_check_packets "dev $h2 ingress" 101 1
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check_err $? "Did not match A-TCAM filter"
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tc filter del dev $h2 ingress protocol ip pref 1 handle 101 flower
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$MZ $h1 -c 1 -p 64 -a $h1mac -b $h2mac -A 192.0.2.1 -B 192.0.2.2 \
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-t ip -q
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tc_check_packets "dev $h2 ingress" 102 1
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check_err $? "Did not match C-TCAM filter after A-TCAM delete"
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tc filter add dev $h2 ingress protocol ip pref 3 handle 103 flower \
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$tcflags dst_ip 192.0.2.2 action drop
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$MZ $h1 -c 1 -p 64 -a $h1mac -b $h2mac -A 192.0.2.1 -B 192.0.2.2 \
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-t ip -q
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tc_check_packets "dev $h2 ingress" 102 2
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check_err $? "Did not match C-TCAM filter after A-TCAM add"
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tc filter del dev $h2 ingress protocol ip pref 2 handle 102 flower
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$MZ $h1 -c 1 -p 64 -a $h1mac -b $h2mac -A 192.0.2.1 -B 192.0.2.2 \
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-t ip -q
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tc_check_packets "dev $h2 ingress" 103 1
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check_err $? "Did not match A-TCAM filter after C-TCAM delete"
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tc filter del dev $h2 ingress protocol ip pref 3 handle 103 flower
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log_test "identical filters test ($tcflags)"
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}
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two_masks_test()
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{
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# When more than one mask is required, the eRP table is used. This
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# test verifies that the eRP table is correctly allocated and used
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RET=0
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tc filter add dev $h2 ingress protocol ip pref 1 handle 101 flower \
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$tcflags dst_ip 192.0.2.2 action drop
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tc filter add dev $h2 ingress protocol ip pref 3 handle 103 flower \
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$tcflags dst_ip 192.0.0.0/16 action drop
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$MZ $h1 -c 1 -p 64 -a $h1mac -b $h2mac -A 192.0.2.1 -B 192.0.2.2 \
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-t ip -q
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tc_check_packets "dev $h2 ingress" 101 1
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check_err $? "Two filters - did not match highest priority"
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tc filter del dev $h2 ingress protocol ip pref 1 handle 101 flower
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$MZ $h1 -c 1 -p 64 -a $h1mac -b $h2mac -A 192.0.2.1 -B 192.0.2.2 \
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-t ip -q
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tc_check_packets "dev $h2 ingress" 103 1
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check_err $? "Single filter - did not match"
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tc filter add dev $h2 ingress protocol ip pref 2 handle 102 flower \
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$tcflags dst_ip 192.0.2.0/24 action drop
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$MZ $h1 -c 1 -p 64 -a $h1mac -b $h2mac -A 192.0.2.1 -B 192.0.2.2 \
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-t ip -q
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tc_check_packets "dev $h2 ingress" 102 1
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check_err $? "Two filters - did not match highest priority after add"
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tc filter del dev $h2 ingress protocol ip pref 3 handle 103 flower
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tc filter del dev $h2 ingress protocol ip pref 2 handle 102 flower
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log_test "two masks test ($tcflags)"
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}
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multiple_masks_test()
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{
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# The number of masks in a region is limited. Once the maximum
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# number of masks has been reached filters that require new
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# masks are spilled to the C-TCAM. This test verifies that
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# spillage is performed correctly and that the right filter is
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# matched
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local index
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RET=0
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NUM_MASKS=32
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BASE_INDEX=100
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for i in $(eval echo {1..$NUM_MASKS}); do
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index=$((BASE_INDEX - i))
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tc filter add dev $h2 ingress protocol ip pref $index \
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handle $index \
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flower $tcflags dst_ip 192.0.2.2/${i} src_ip 192.0.2.1 \
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action drop
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$MZ $h1 -c 1 -p 64 -a $h1mac -b $h2mac -A 192.0.2.1 \
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-B 192.0.2.2 -t ip -q
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tc_check_packets "dev $h2 ingress" $index 1
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check_err $? "$i filters - did not match highest priority (add)"
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done
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for i in $(eval echo {$NUM_MASKS..1}); do
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index=$((BASE_INDEX - i))
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$MZ $h1 -c 1 -p 64 -a $h1mac -b $h2mac -A 192.0.2.1 \
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-B 192.0.2.2 -t ip -q
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tc_check_packets "dev $h2 ingress" $index 2
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check_err $? "$i filters - did not match highest priority (del)"
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tc filter del dev $h2 ingress protocol ip pref $index \
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handle $index flower
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done
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log_test "multiple masks test ($tcflags)"
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}
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ctcam_two_atcam_masks_test()
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{
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RET=0
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# First case: C-TCAM is disabled when there are two A-TCAM masks.
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# We push a filter into the C-TCAM by using two identical filters
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# as in identical_filters_test()
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# Filter goes into A-TCAM
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tc filter add dev $h2 ingress protocol ip pref 1 handle 101 flower \
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$tcflags dst_ip 192.0.2.2 action drop
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# Filter goes into C-TCAM
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tc filter add dev $h2 ingress protocol ip pref 2 handle 102 flower \
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$tcflags dst_ip 192.0.2.2 action drop
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# Filter goes into A-TCAM
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tc filter add dev $h2 ingress protocol ip pref 3 handle 103 flower \
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$tcflags dst_ip 192.0.2.0/24 action drop
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$MZ $h1 -c 1 -p 64 -a $h1mac -b $h2mac -A 192.0.2.1 -B 192.0.2.2 \
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-t ip -q
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tc_check_packets "dev $h2 ingress" 101 1
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check_err $? "Did not match A-TCAM filter"
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# Delete both A-TCAM and C-TCAM filters and make sure the remaining
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# A-TCAM filter still works
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tc filter del dev $h2 ingress protocol ip pref 2 handle 102 flower
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tc filter del dev $h2 ingress protocol ip pref 1 handle 101 flower
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$MZ $h1 -c 1 -p 64 -a $h1mac -b $h2mac -A 192.0.2.1 -B 192.0.2.2 \
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-t ip -q
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tc_check_packets "dev $h2 ingress" 103 1
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check_err $? "Did not match A-TCAM filter"
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tc filter del dev $h2 ingress protocol ip pref 3 handle 103 flower
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log_test "ctcam with two atcam masks test ($tcflags)"
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}
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ctcam_one_atcam_mask_test()
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{
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RET=0
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# Second case: C-TCAM is disabled when there is one A-TCAM mask.
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# The test is similar to identical_filters_test()
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# Filter goes into A-TCAM
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tc filter add dev $h2 ingress protocol ip pref 2 handle 102 flower \
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$tcflags dst_ip 192.0.2.2 action drop
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# Filter goes into C-TCAM
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tc filter add dev $h2 ingress protocol ip pref 1 handle 101 flower \
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$tcflags dst_ip 192.0.2.2 action drop
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$MZ $h1 -c 1 -p 64 -a $h1mac -b $h2mac -A 192.0.2.1 -B 192.0.2.2 \
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-t ip -q
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tc_check_packets "dev $h2 ingress" 101 1
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check_err $? "Did not match C-TCAM filter"
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tc filter del dev $h2 ingress protocol ip pref 1 handle 101 flower
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$MZ $h1 -c 1 -p 64 -a $h1mac -b $h2mac -A 192.0.2.1 -B 192.0.2.2 \
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-t ip -q
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tc_check_packets "dev $h2 ingress" 102 1
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check_err $? "Did not match A-TCAM filter"
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tc filter del dev $h2 ingress protocol ip pref 2 handle 102 flower
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log_test "ctcam with one atcam mask test ($tcflags)"
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}
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ctcam_no_atcam_masks_test()
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{
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RET=0
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# Third case: C-TCAM is disabled when there are no A-TCAM masks
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# This test exercises the code path that transitions the eRP table
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# to its initial state after deleting the last C-TCAM mask
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# Filter goes into A-TCAM
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tc filter add dev $h2 ingress protocol ip pref 1 handle 101 flower \
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$tcflags dst_ip 192.0.2.2 action drop
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# Filter goes into C-TCAM
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tc filter add dev $h2 ingress protocol ip pref 2 handle 102 flower \
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$tcflags dst_ip 192.0.2.2 action drop
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tc filter del dev $h2 ingress protocol ip pref 1 handle 101 flower
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tc filter del dev $h2 ingress protocol ip pref 2 handle 102 flower
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log_test "ctcam with no atcam masks test ($tcflags)"
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}
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ctcam_edge_cases_test()
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{
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# When the C-TCAM is disabled after deleting the last C-TCAM
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# mask, we want to make sure the eRP state machine is put in
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# the correct state
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ctcam_two_atcam_masks_test
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ctcam_one_atcam_mask_test
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ctcam_no_atcam_masks_test
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}
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setup_prepare()
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{
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h1=${NETIFS[p1]}
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h2=${NETIFS[p2]}
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h1mac=$(mac_get $h1)
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h2mac=$(mac_get $h2)
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vrf_prepare
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h1_create
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h2_create
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}
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cleanup()
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{
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pre_cleanup
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h2_destroy
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h1_destroy
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vrf_cleanup
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}
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trap cleanup EXIT
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setup_prepare
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setup_wait
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tests_run
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if ! tc_offload_check; then
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check_err 1 "Could not test offloaded functionality"
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log_test "mlxsw-specific tests for tc flower"
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exit
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else
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tcflags="skip_sw"
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tests_run
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fi
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exit $EXIT_STATUS
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