diff mbox series

[ovs-dev,v4,2/2] dpif-netdev : Fix ALB 'rebalance_intvl' max hard limit.

Message ID ME3P282MB3507EA5D370B2DDB86364479CDD19@ME3P282MB3507.AUSP282.PROD.OUTLOOK.COM
State Superseded
Headers show
Series Fix ALB parameters type and value mismatch. | expand

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Commit Message

miter May 18, 2022, 2:18 p.m. UTC 
From: Lin Huang <linhuang@ruijie.com.cn>

Currently the pmd-auto-lb-rebal-interval's value was not been
checked properly.
It maybe a negative, or too big value (>2 weeks between rebalances),
which will be lead to a big unsigned value. So reset it to default
if the value exceeds the max permitted as described in vswitchd.xml.

Fixes: 5bf84282482a ("Adding support for PMD auto load balancing")
Signed-off-by: Lin Huang <linhuang@ruijie.com.cn>
---
 lib/dpif-netdev.c |  6 +++++-
 tests/alb.at      | 20 +++++++++++++++++++-
 2 files changed, 24 insertions(+), 2 deletions(-)
diff mbox series

Patch

diff --git a/lib/dpif-netdev.c b/lib/dpif-netdev.c
index 3597d7e40..33fb8ad81 100644
--- a/lib/dpif-netdev.c
+++ b/lib/dpif-netdev.c
@@ -93,7 +93,8 @@  VLOG_DEFINE_THIS_MODULE(dpif_netdev);
 /* Auto Load Balancing Defaults */
 #define ALB_IMPROVEMENT_THRESHOLD    25
 #define ALB_LOAD_THRESHOLD           95
-#define ALB_REBALANCE_INTERVAL       1 /* 1 Min */
+#define ALB_REBALANCE_INTERVAL       1     /* 1 Min */
+#define MAX_ALB_REBALANCE_INTERVAL   20000 /* 20000 Min */
 #define MIN_TO_MSEC                  60000
 
 #define FLOW_DUMP_MAX_BATCH 50
@@ -4883,6 +4884,9 @@  dpif_netdev_set_config(struct dpif *dpif, const struct smap *other_config)
     rebalance_intvl = smap_get_ullong(other_config,
                                       "pmd-auto-lb-rebal-interval",
                                       ALB_REBALANCE_INTERVAL);
+    if (rebalance_intvl > MAX_ALB_REBALANCE_INTERVAL) {
+        rebalance_intvl = ALB_REBALANCE_INTERVAL;
+    }
 
     /* Input is in min, convert it to msec. */
     rebalance_intvl =
diff --git a/tests/alb.at b/tests/alb.at
index 0036bd1f2..922185d61 100644
--- a/tests/alb.at
+++ b/tests/alb.at
@@ -243,7 +243,25 @@  get_log_next_line_num
 AT_CHECK([ovs-vsctl set open_vswitch . other_config:pmd-auto-lb-rebal-interval="0"])
 CHECK_ALB_PARAM([interval], [1 mins], [+$LINENUM])
 
-# No check for above max as it is only a documented max value and not a hard limit
+# Set new value
+get_log_next_line_num
+AT_CHECK([ovs-vsctl set open_vswitch . other_config:pmd-auto-lb-rebal-interval="100"])
+CHECK_ALB_PARAM([interval], [100 mins], [+$LINENUM])
+
+# Set above max value
+get_log_next_line_num
+AT_CHECK([ovs-vsctl set open_vswitch . other_config:pmd-auto-lb-rebal-interval="20001"])
+CHECK_ALB_PARAM([interval], [1 mins], [+$LINENUM])
+
+# Set new value
+get_log_next_line_num
+AT_CHECK([ovs-vsctl set open_vswitch . other_config:pmd-auto-lb-rebal-interval="1000"])
+CHECK_ALB_PARAM([interval], [1000 mins], [+$LINENUM])
+
+# Set Negative value
+get_log_next_line_num
+AT_CHECK([ovs-vsctl set open_vswitch . other_config:pmd-auto-lb-rebal-interval="-1"])
+CHECK_ALB_PARAM([interval], [1 mins], [+$LINENUM])
 
 OVS_VSWITCHD_STOP
 AT_CLEANUP