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diff --git a/tests/sys/netpfil/common/dummynet.sh b/tests/sys/netpfil/common/dummynet.sh
--- a/tests/sys/netpfil/common/dummynet.sh
+++ b/tests/sys/netpfil/common/dummynet.sh
@@ -610,6 +610,133 @@
+aqm_masked_head()
+{
+ atf_set descr 'CoDel/PIE on a masked pipe or scheduler'
+ atf_set require.user root
+}
+
+aqm_masked_body()
+{
+ fw=$1
+ firewall_init $fw
+ dummynet_init $fw
+
+ epair=$(vnet_mkepair)
+ vnet_mkjail alcatraz ${epair}b
+
+ ifconfig ${epair}a 192.0.2.1/24 up
+ jexec alcatraz ifconfig ${epair}b 192.0.2.2/24 up
+
+ # Sanity check
+ atf_check -s exit:0 -o ignore ping -i .1 -c 3 -s 1200 192.0.2.2
+
+ # The mask goes to the FIFO scheduler of the pipe, which always has
+ # a hash table for its instances. That is not a busy flowset.
+ jexec alcatraz dnctl pipe 1 config bw 10Mb mask dst-ip 0xffffffff codel
+ atf_check -s exit:0 -o match:"AQM CoDel" jexec alcatraz dnctl pipe 1 show
+ jexec alcatraz dnctl pipe 2 config bw 10Mb mask dst-ip 0xffffffff pie
+ atf_check -s exit:0 -o match:"AQM type PIE" jexec alcatraz dnctl pipe 2 show
+
+ jexec alcatraz dnctl sched 3 config type wf2q+ mask dst-ip 0xffffffff
+ jexec alcatraz dnctl queue 3 config sched 3 codel
+ atf_check -s exit:0 -o match:"AQM CoDel" jexec alcatraz dnctl queue 3 show
+
+ firewall_config alcatraz ${fw} \
+ "ipfw" \
+ "ipfw add 1000 pipe 1 ip from any to any" \
+ "pf" \
+ "pass dnpipe 1"
+
+ atf_check -s exit:0 -o ignore ping -i .1 -c 3 192.0.2.2
+}
+
+aqm_masked_cleanup()
+{
+ firewall_cleanup $1
+}
+
+aqm_reconfig_head()
+{
+ atf_set descr 'Reconfigure CoDel/PIE flowsets that have traffic'
+ atf_set require.user root
+}
+
+aqm_reconfig_body()
+{
+ fw=$1
+ firewall_init $fw
+ dummynet_init $fw
+
+ epair=$(vnet_mkepair)
+ vnet_mkjail alcatraz ${epair}b
+
+ ifconfig ${epair}a 192.0.2.1/24 up
+ jexec alcatraz ifconfig ${epair}b 192.0.2.2/24 up
+
+ # Sanity check
+ atf_check -s exit:0 -o ignore ping -i .1 -c 3 -s 1200 192.0.2.2
+
+ # Flowset of a pipe (FIFO scheduler, queue inside the instance).
+ jexec alcatraz dnctl pipe 1 config bw 10Mb codel
+
+ firewall_config alcatraz ${fw} \
+ "ipfw" \
+ "ipfw add 1000 pipe 1 ip from any to any" \
+ "pf" \
+ "pass dnpipe 1"
+
+ # Keep an instance alive while we reconfigure.
+ ping -i .1 -c 30 192.0.2.2 > /dev/null &
+ sleep 1
+
+ # Changed parameters: the flowset is detached and attached again.
+ jexec alcatraz dnctl pipe 1 config bw 10Mb queue 100 codel
+ atf_check -s exit:0 -o match:"AQM CoDel" jexec alcatraz dnctl pipe 1 show
+ # Unchanged parameters, new AQM.
+ jexec alcatraz dnctl pipe 1 config bw 10Mb queue 100 pie
+ atf_check -s exit:0 -o match:"AQM type PIE" jexec alcatraz dnctl pipe 1 show
+ wait
+
+ # The existing instance needs a working AQM state, or it drops all.
+ atf_check -s exit:0 -o ignore ping -i .1 -c 3 192.0.2.2
+
+ # Queues of a WF2Q+ scheduler, one with a mask.
+ jexec alcatraz dnctl pipe 2 config bw 10Mb
+ jexec alcatraz dnctl queue 2 config pipe 2 weight 10 codel
+ jexec alcatraz dnctl queue 3 config pipe 2 mask dst-ip 0xffffffff weight 10 codel
+
+ firewall_config alcatraz ${fw} \
+ "ipfw" \
+ "ipfw add 1000 queue 2 icmp from any to any" \
+ "ipfw add 1010 queue 3 ip from any to any" \
+ "pf" \
+ "pass dnqueue 3" \
+ "pass proto icmp dnqueue 2"
+
+ ping -i .1 -c 30 192.0.2.2 > /dev/null &
+ sleep 1
+
+ # Unchanged parameters, new AQM parameters.
+ jexec alcatraz dnctl queue 2 config pipe 2 weight 10 codel target 20ms
+ atf_check -s exit:0 -o match:"AQM CoDel target 20ms" \
+ jexec alcatraz dnctl queue 2 show
+ # Changed parameters.
+ jexec alcatraz dnctl queue 2 config pipe 2 weight 20 codel
+ atf_check -s exit:0 -o match:"AQM CoDel" jexec alcatraz dnctl queue 2 show
+ # Same line again on a masked queue.
+ jexec alcatraz dnctl queue 3 config pipe 2 mask dst-ip 0xffffffff weight 10 codel
+ atf_check -s exit:0 -o match:"AQM CoDel" jexec alcatraz dnctl queue 3 show
+ wait
+
+ atf_check -s exit:0 -o ignore ping -i .1 -c 3 192.0.2.2
+}
+
+aqm_reconfig_cleanup()
+{
+ firewall_cleanup $1
+}
+
setup_tests \
interface_removal \
ipfw \
@@ -637,5 +764,11 @@
ipfw \
pf \
pls_gilbert \
+ ipfw \
+ pf \
+ aqm_masked \
+ ipfw \
+ pf \
+ aqm_reconfig \
ipfw \
pf

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