[ovs-dev] [PATCH 4/4] bfd: Add unit tests for BFD decay.

Alex Wang alexw at nicira.com
Mon Aug 5 21:04:37 UTC 2013


This commit adds unit tests for BFD decay feature.

Signed-off-by: Alex Wang <alexw at nicira.com>
---
 tests/bfd.at |  189 +++++++++++++++++++++++++++++++++++++++++++++++++++++++---
 1 file changed, 180 insertions(+), 9 deletions(-)

diff --git a/tests/bfd.at b/tests/bfd.at
index c54fff0..c1f78d2 100644
--- a/tests/bfd.at
+++ b/tests/bfd.at
@@ -20,9 +20,9 @@ AT_CHECK([ovs-appctl bfd/show $1 | sed -e '/Time:/d' | sed -e '/Discriminator/d'
 m4_define([BFD_CHECK_TX], [
 AT_CHECK([ovs-appctl bfd/show $1 | sed -n '/TX Interval/p'],[0],
 [dnl
-	TX Interval: Approx 1000ms
-	Local Minimum TX Interval: $2
-	Remote Minimum TX Interval: $3
+	TX Interval: Approx $2
+	Local Minimum TX Interval: $3
+	Remote Minimum TX Interval: $4
 ])
 ])
 
@@ -30,8 +30,8 @@ m4_define([BFD_CHECK_RX], [
 AT_CHECK([ovs-appctl bfd/show $1 | sed -n '/RX Interval/p'],[0],
 [dnl
 	RX Interval: Approx $2
-	Local Minimum RX Interval: $2
-	Remote Minimum RX Interval: $3
+	Local Minimum RX Interval: $3
+	Remote Minimum RX Interval: $4
 ])
 ])
 AT_SETUP([bfd - basic config on different bridges])
@@ -202,14 +202,185 @@ BFD_CHECK([p0], [true], [false], [none], [up], [No Diagnostic], [none], [up], [N
 #Edit the min Tx value.
 AT_CHECK([ovs-vsctl set interface p0 bfd:min_tx=200])
 for i in `seq 0 20`; do ovs-appctl time/warp 100; done
-BFD_CHECK_TX([p0], [200ms], [100ms])
-BFD_CHECK_TX([p1], [100ms], [200ms])
+BFD_CHECK_TX([p0], [1000ms], [200ms], [100ms])
+BFD_CHECK_TX([p1], [1000ms], [100ms], [200ms])
 
 #Edit the min Rx value.
 AT_CHECK([ovs-vsctl set interface p1 bfd:min_rx=300])
 for i in `seq 0 20`; do ovs-appctl time/warp 100; done
-BFD_CHECK_RX([p1], [300ms], [1000ms])
-BFD_CHECK_RX([p0], [1000ms], [300ms])
+BFD_CHECK_RX([p1], [300ms], [300ms], [1000ms])
+BFD_CHECK_RX([p0], [1000ms], [1000ms], [300ms])
 
 OVS_VSWITCHD_STOP
 AT_CLEANUP
+
+# Tests below are for bfd decay features.
+AT_SETUP([bfd - bfd decay])
+OVS_VSWITCHD_START([add-br br1 -- set bridge br1 datapath-type=dummy -- \
+                    add-port br1 p1 -- set Interface p1 type=patch \
+                    options:peer=p0 ofport_request=2 -- \
+                    add-port br0 p0 -- set Interface p0 type=patch \
+                    options:peer=p1 ofport_request=1 -- \
+                    set Interface p0 bfd:enable=true bfd:min_tx=300 bfd:min_rx=300 bfd:decay_min_rx=3000 -- \
+                    set Interface p1 bfd:enable=true bfd:min_tx=500 bfd:min_rx=500 -- \
+                    add-port br1 p2 -- set Interface p2 type=internal ofport_request=3])
+
+ovs-appctl time/stop
+
+
+# Test-1 BFD decay to 3000ms
+# bfd:decay_min_rx is set to 3000ms after the first 2500ms,
+# the bfd should up.
+for i in `seq 0 4`; do ovs-appctl time/warp 500; done
+BFD_CHECK([p0], [true], [false], [none], [up], [No Diagnostic], [none], [up], [No Diagnostic])
+BFD_CHECK_TX([p0], [500ms], [300ms], [500ms])
+BFD_CHECK_RX([p0], [500ms], [300ms], [500ms])
+
+# advance the clock by 500ms.
+ovs-appctl time/warp 500
+# now at 3000ms, expect to see poll related flags at p0 and p1
+BFD_CHECK([p0], [true], [false], [none], [up], [No Diagnostic], [final], [up], [No Diagnostic])
+BFD_CHECK([p1], [true], [false], [none], [up], [No Diagnostic], [poll], [up], [No Diagnostic])
+BFD_CHECK_TX([p0], [500ms], [300ms], [500ms])
+BFD_CHECK_RX([p0], [3000ms], [3000ms], [500ms])
+
+# since the tx_min of p0 is still 500ms, after 500ms from decay,
+# the control message will be sent p1 and p1 flag will back to none.
+ovs-appctl time/warp 500
+BFD_CHECK([p1], [true], [false], [none], [up], [No Diagnostic], [none], [up], [No Diagnostic])
+# the rx_min of p0 is 3000ms now. and p1 will send next control message
+# 3000ms after decay.
+for i in `seq 0 4`; do ovs-appctl time/warp 500; done
+BFD_CHECK([p0], [true], [false], [none], [up], [No Diagnostic], [none], [up], [No Diagnostic])
+BFD_CHECK_TX([p0], [500ms], [300ms], [500ms])
+BFD_CHECK_RX([p0], [3000ms], [3000ms], [500ms])
+
+
+# Test-2 BFD decay go back to cfg_min_rx when there is traffic
+# receive packet at 1/100ms rate for 3000ms.
+for i in `seq 0 30`
+do
+    ovs-appctl time/warp 100
+    AT_CHECK([ovs-ofctl packet-out br1 3 2  "90e2ba01475000101856b2e80806000108000604000100101856b2e80202020300000000000002020202"],
+             [0], [stdout], [])
+done
+# after a decay interval (3000ms), the p0 min_rx will go back to
+# cfg_min_rx.
+BFD_CHECK([p0], [true], [false], [none], [up], [No Diagnostic], [none], [up], [No Diagnostic])
+BFD_CHECK_TX([p0], [500ms], [300ms], [500ms])
+BFD_CHECK_RX([p0], [500ms], [300ms], [500ms])
+
+
+# Test-3 BFD decay go back to cfg_min_rx when decay_min_rx is changed.
+# advance the clock by 4000ms, so p0 is decayed.
+for i in `seq 0 5`; do ovs-appctl time/warp 500; done
+BFD_CHECK([p0], [true], [false], [none], [up], [No Diagnostic], [none], [up], [No Diagnostic])
+BFD_CHECK([p1], [true], [false], [none], [up], [No Diagnostic], [none], [up], [No Diagnostic])
+BFD_CHECK_TX([p0], [500ms], [300ms], [500ms])
+BFD_CHECK_RX([p0], [3000ms], [3000ms], [500ms])
+
+# change decay_min_rx to 1000ms.
+# for decay_min_rx < 2000ms, the decay detection time is set to 2000ms.
+# this should firstly reset the min_rx and then start poll.
+AT_CHECK([ovs-vsctl set Interface p0 bfd:decay_min_rx=1000])
+BFD_CHECK([p0], [true], [false], [none], [up], [No Diagnostic], [final], [up], [No Diagnostic])
+BFD_CHECK([p1], [true], [false], [none], [up], [No Diagnostic], [poll], [up], [No Diagnostic])
+BFD_CHECK_TX([p0], [500ms], [300ms], [500ms])
+BFD_CHECK_RX([p0], [500ms], [300ms], [500ms])
+
+# for the following 1500ms, there should be no decay,
+# since the decay_detect_time is set to 2000ms.
+for i in `seq 0 2`
+do
+    ovs-appctl time/warp 500
+    BFD_CHECK([p0], [true], [false], [none], [up], [No Diagnostic], [none], [up], [No Diagnostic])
+    BFD_CHECK([p1], [true], [false], [none], [up], [No Diagnostic], [none], [up], [No Diagnostic])
+    BFD_CHECK_TX([p0], [500ms], [300ms], [500ms])
+    BFD_CHECK_RX([p0], [500ms], [300ms], [500ms])
+done
+
+ovs-appctl time/warp 500
+# at 2000ms, decay should happen and there should be the poll.
+BFD_CHECK([p0], [true], [false], [none], [up], [No Diagnostic], [final], [up], [No Diagnostic])
+BFD_CHECK([p1], [true], [false], [none], [up], [No Diagnostic], [poll], [up], [No Diagnostic])
+BFD_CHECK_TX([p0], [500ms], [300ms], [500ms])
+BFD_CHECK_RX([p0], [1000ms], [1000ms], [500ms])
+for i in `seq 0 4`; do ovs-appctl time/warp 500; done
+
+# Test-4 set min_rx to 800ms.
+# This should firstly reset the min_rx and then re-decay to 2000ms.
+AT_CHECK([ovs-vsctl set Interface p0 bfd:min_rx=800])
+BFD_CHECK([p0], [true], [false], [none], [up], [No Diagnostic], [final], [up], [No Diagnostic])
+BFD_CHECK([p1], [true], [false], [none], [up], [No Diagnostic], [poll], [up], [No Diagnostic])
+BFD_CHECK_TX([p0], [500ms], [300ms], [500ms])
+BFD_CHECK_RX([p0], [800ms], [800ms], [500ms])
+
+# for the following 1600ms, there should be no decay,
+# since the decay detection time is set to 2000ms.
+for i in `seq 0 1`
+do
+    ovs-appctl time/warp 800
+    BFD_CHECK([p0], [true], [false], [none], [up], [No Diagnostic], [none], [up], [No Diagnostic])
+    BFD_CHECK([p1], [true], [false], [none], [up], [No Diagnostic], [none], [up], [No Diagnostic])
+    BFD_CHECK_TX([p0], [500ms], [300ms], [500ms])
+    BFD_CHECK_RX([p0], [800ms], [800ms], [500ms])
+done
+
+ovs-appctl time/warp 500
+# at 2000ms, decay should happen and there should be the poll.
+BFD_CHECK([p0], [true], [false], [none], [up], [No Diagnostic], [final], [up], [No Diagnostic])
+BFD_CHECK([p1], [true], [false], [none], [up], [No Diagnostic], [poll], [up], [No Diagnostic])
+BFD_CHECK_TX([p0], [500ms], [300ms], [500ms])
+BFD_CHECK_RX([p0], [1000ms], [1000ms], [500ms])
+for i in `seq 0 4`; do ovs-appctl time/warp 500; done
+
+
+# Test-5 set min_rx to 300ms and decay_min_rx to 5000ms.
+AT_CHECK([ovs-vsctl set Interface p0 bfd:min_rx=300 bfd:decay_min_rx=5000])
+BFD_CHECK([p0], [true], [false], [none], [up], [No Diagnostic], [final], [up], [No Diagnostic])
+BFD_CHECK([p1], [true], [false], [none], [up], [No Diagnostic], [poll], [up], [No Diagnostic])
+BFD_CHECK_TX([p0], [500ms], [300ms], [500ms])
+BFD_CHECK_RX([p0], [500ms], [300ms], [500ms])
+
+# for decay_min_rx > 2000ms, the decay detection time is set to
+# decay_min_rx.
+# for the following 4500ms, there should be no decay,
+# since the decay detection time is set to 5000ms.
+for i in `seq 0 8`
+do
+    ovs-appctl time/warp 500
+    BFD_CHECK([p0], [true], [false], [none], [up], [No Diagnostic], [none], [up], [No Diagnostic])
+    BFD_CHECK([p1], [true], [false], [none], [up], [No Diagnostic], [none], [up], [No Diagnostic])
+    BFD_CHECK_TX([p0], [500ms], [300ms], [500ms])
+    BFD_CHECK_RX([p0], [500ms], [300ms], [500ms])
+done
+
+ovs-appctl time/warp 500
+# at 5000ms, decay should happen and there should be the poll.
+BFD_CHECK([p0], [true], [false], [none], [up], [No Diagnostic], [final], [up], [No Diagnostic])
+BFD_CHECK([p1], [true], [false], [none], [up], [No Diagnostic], [poll], [up], [No Diagnostic])
+BFD_CHECK_TX([p0], [500ms], [300ms], [500ms])
+BFD_CHECK_RX([p0], [5000ms], [5000ms], [500ms])
+for i in `seq 0 9`; do ovs-appctl time/warp 500; done
+
+
+# Test-6 set decay_min_rx to 0 to disable bfd decay.
+AT_CHECK([ovs-vsctl set Interface p0 bfd:decay_min_rx=0])
+AT_CHECK([ovs-appctl bfd/show], [0], [stdout], [])
+# The final flag must be set, since the configuration of bfd related variables triggers a bfd poll.
+BFD_CHECK([p0], [true], [false], [none], [up], [No Diagnostic], [final], [up], [No Diagnostic])
+BFD_CHECK([p1], [true], [false], [none], [up], [No Diagnostic], [poll], [up], [No Diagnostic])
+BFD_CHECK_TX([p0], [500ms], [300ms], [500ms])
+BFD_CHECK_RX([p0], [500ms], [300ms], [500ms])
+for i in `seq 0 20`
+do
+    ovs-appctl time/warp 500
+    BFD_CHECK([p0], [true], [false], [none], [up], [No Diagnostic], [none], [up], [No Diagnostic])
+    BFD_CHECK([p1], [true], [false], [none], [up], [No Diagnostic], [none], [up], [No Diagnostic])
+    BFD_CHECK_TX([p0], [500ms], [300ms], [500ms])
+    BFD_CHECK_RX([p0], [500ms], [300ms], [500ms])
+done
+
+AT_CHECK([ovs-vsctl del-br br1], [0], [ignore])
+AT_CLEANUP
+
-- 
1.7.9.5




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