Max allowed userspace dp conntrack entries is configurable with
'ovs-appctl dpctl/ct-set-maxconns' command. In real scenarios,
this configuration is expected to survive from host reboot, from
ovs service restart.
Signed-off-by: lic121 <lic...@chinatelecom.cn>
---
Notes:
v3:
- add a warning to dpctl_ct_set_maxconns
- add NEWS entry
v2:
- rename "ct-maxconns" to "userspace-ct-maxconns"
NEWS | 5 +++++
lib/dpctl.c | 3 +++
lib/dpctl.man | 4 +++-
lib/dpif-netdev.c | 11 +++++++++++
tests/system-traffic.at | 10 ++++++++++
vswitchd/vswitch.xml | 7 +++++++
6 files changed, 39 insertions(+), 1 deletion(-)
diff --git a/NEWS b/NEWS
index eece0d0..e75b2af 100644
--- a/NEWS
+++ b/NEWS
@@ -29,6 +29,11 @@ Post-v2.17.0
- Windows:
* Conntrack support for TCPv6, UDPv6, ICMPv6, FTPv6.
* IPv6 Geneve tunnel support.
+ - Userspace datapath:
+ * 'ovs-appctl dpctl/ct-set-maxconns' is deprecated for lack of persistence
+ capabilitiy.
+ * New configuration knob 'other_config:userspace-ct-maxconns' to set
+ maximum number of connection tracker entries for userspace datapath.
v2.17.0 - 17 Feb 2022
diff --git a/lib/dpctl.c b/lib/dpctl.c
index 29041fa..73cf14c 100644
--- a/lib/dpctl.c
+++ b/lib/dpctl.c
@@ -1990,6 +1990,9 @@ dpctl_ct_set_maxconns(int argc, const char *argv[],
struct dpif *dpif;
int error = opt_dpif_open(argc, argv, dpctl_p, 3, &dpif);
if (!error) {
+ dpctl_print(dpctl_p,
+ "Warning: dpctl/ct-set-maxconns is deprecated by "
+ "other_config:userspace-ct-maxconns");
uint32_t maxconns;
if (ovs_scan(argv[argc - 1], "%"SCNu32, &maxconns)) {
error = ct_dpif_set_maxconns(dpif, maxconns);
diff --git a/lib/dpctl.man b/lib/dpctl.man
index c100d0a..4f08a3f 100644
--- a/lib/dpctl.man
+++ b/lib/dpctl.man
@@ -343,7 +343,9 @@ system due to connection tracking or simply limiting
connection
tracking. If the number of connections is already over the new maximum
limit request then the new maximum limit will be enforced when the
number of connections decreases to that limit, which normally happens
-due to connection expiry. Only supported for userspace datapath.
+due to connection expiry. Only supported for userspace datapath. This
+command is deprecated by ovsdb cfg other_config:userspace-ct-maxconns
+because of persistence capability.
.
.TP
\*(DX\fBct\-get\-maxconns\fR [\fIdp\fR]
diff --git a/lib/dpif-netdev.c b/lib/dpif-netdev.c
index 21277b2..bfbe6db 100644
--- a/lib/dpif-netdev.c
+++ b/lib/dpif-netdev.c
@@ -4828,6 +4828,17 @@ dpif_netdev_set_config(struct dpif *dpif, const struct
smap *other_config)
}
}
+ uint32_t ct_maxconns, cur_maxconns;
+ ct_maxconns = smap_get_int(other_config, "userspace-ct-maxconns",
+ UINT32_MAX);
+ /* Leave runtime value as it is when cfg is removed. */
+ if (ct_maxconns < UINT32_MAX) {
+ conntrack_get_maxconns(dp->conntrack, &cur_maxconns);
+ if (ct_maxconns != cur_maxconns) {
+ conntrack_set_maxconns(dp->conntrack, ct_maxconns);
+ }
+ }
+
bool smc_enable = smap_get_bool(other_config, "smc-enable", false);
bool cur_smc;
atomic_read_relaxed(&dp->smc_enable_db, &cur_smc);
diff --git a/tests/system-traffic.at b/tests/system-traffic.at
index 1d20366..cb1eb16 100644
--- a/tests/system-traffic.at
+++ b/tests/system-traffic.at
@@ -2305,6 +2305,16 @@ AT_CHECK([ovs-appctl dpctl/ct-get-maxconns], [], [dnl
10
])
+AT_CHECK([ovs-vsctl set Open_vswitch . other_config:userspace-ct-maxconns=20],
[0])
+AT_CHECK([ovs-appctl dpctl/ct-get-maxconns], [], [dnl
+20
+])
+
+AT_CHECK([ovs-vsctl remove Open_vswitch . other_config userspace-ct-maxconns],
[0])
+AT_CHECK([ovs-appctl dpctl/ct-get-maxconns], [], [dnl
+20
+])
+
OVS_TRAFFIC_VSWITCHD_STOP
AT_CLEANUP
diff --git a/vswitchd/vswitch.xml b/vswitchd/vswitch.xml
index cc1dd77..f2324be 100644
--- a/vswitchd/vswitch.xml
+++ b/vswitchd/vswitch.xml
@@ -183,6 +183,13 @@
</p>
</column>
+ <column name="other_config" key="userspace-ct-maxconns"
+ type='{"type": "integer", "minInteger": 0}'>
+ The maximum number of connection tracker entries allowed in the
+ userspace datapath. This deprecates "ovs-appctl dpctl/ct-set-maxconns"
+ command.
+ </column>
+
<column name="other_config" key="max-idle"
type='{"type": "integer", "minInteger": 500}'>
<p>
--
1.8.3.1
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