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Add tether BPF offload config to device config and resource

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The tether bpf offload can be enabled by resource config and
device config. The device config has higher priority and it
could override this config which is set by resource config.

Bug: 149997301
Test: -build, flash, boot
      -atest TetheringConfigurationTest
Change-Id: I9c26852d2c926786e141ece6da53df3801c049b2
This commit is contained in:
Hungming Chen
2020-04-02 18:47:19 +08:00
parent 80ab95927b
commit 8bf2e7e05b
4 changed files with 95 additions and 4 deletions
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42
Tethering/src/com/android/networkstack/tethering/TetheringConfiguration.java
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@@ -72,6 +72,12 @@ public class TetheringConfiguration {
private static final String[] DEFAULT_IPV4_DNS = {"8.8.4.4", "8.8.8.8"};
/**
* Override enabling BPF offload configuration for tethering.
*/
public static final String OVERRIDE_TETHER_ENABLE_BPF_OFFLOAD =
"override_tether_enable_bpf_offload";
/**
* Use the old dnsmasq DHCP server for tethering instead of the framework implementation.
*/
@@ -95,6 +101,8 @@ public class TetheringConfiguration {
public final String[] legacyDhcpRanges;
public final String[] defaultIPv4DNS;
public final boolean enableLegacyDhcpServer;
// TODO: Add to TetheringConfigurationParcel if required.
public final boolean enableBpfOffload;
public final String[] provisioningApp;
public final String provisioningAppNoUi;
@@ -124,11 +132,12 @@ public class TetheringConfiguration {
isDunRequired = checkDunRequired(ctx);
chooseUpstreamAutomatically = getResourceBoolean(
res, R.bool.config_tether_upstream_automatic);
res, R.bool.config_tether_upstream_automatic, false /** default value */);
preferredUpstreamIfaceTypes = getUpstreamIfaceTypes(res, isDunRequired);
legacyDhcpRanges = getLegacyDhcpRanges(res);
defaultIPv4DNS = copy(DEFAULT_IPV4_DNS);
enableBpfOffload = getEnableBpfOffload(res);
enableLegacyDhcpServer = getEnableLegacyDhcpServer(res);
provisioningApp = getResourceStringArray(res, R.array.config_mobile_hotspot_provision_app);
@@ -208,6 +217,9 @@ public class TetheringConfiguration {
pw.print("provisioningAppNoUi: ");
pw.println(provisioningAppNoUi);
pw.print("enableBpfOffload: ");
pw.println(enableBpfOffload);
pw.print("enableLegacyDhcpServer: ");
pw.println(enableLegacyDhcpServer);
}
@@ -228,6 +240,7 @@ public class TetheringConfiguration {
toIntArray(preferredUpstreamIfaceTypes)));
sj.add(String.format("provisioningApp:%s", makeString(provisioningApp)));
sj.add(String.format("provisioningAppNoUi:%s", provisioningAppNoUi));
sj.add(String.format("enableBpfOffload:%s", enableBpfOffload));
sj.add(String.format("enableLegacyDhcpServer:%s", enableLegacyDhcpServer));
return String.format("TetheringConfiguration{%s}", sj.toString());
}
@@ -332,11 +345,11 @@ public class TetheringConfiguration {
}
}
private static boolean getResourceBoolean(Resources res, int resId) {
private static boolean getResourceBoolean(Resources res, int resId, boolean defaultValue) {
try {
return res.getBoolean(resId);
} catch (Resources.NotFoundException e404) {
return false;
return defaultValue;
}
}
@@ -357,8 +370,29 @@ public class TetheringConfiguration {
}
}
private boolean getEnableBpfOffload(final Resources res) {
// Get BPF offload config
// Priority 1: Device config
// Priority 2: Resource config
// Priority 3: Default value
final boolean resourceValue = getResourceBoolean(
res, R.bool.config_tether_enable_bpf_offload, true /** default value */);
// Due to the limitation of static mock for testing, using #getProperty directly instead
// of getDeviceConfigBoolean. getDeviceConfigBoolean is not invoked because it uses
// #getBoolean to get the boolean device config. The test can't know that the returned
// boolean value comes from device config or default value (because of null property
// string). Because the test would like to verify null property boolean string case,
// use DeviceConfig.getProperty here. See also the test case testBpfOffload{*} in
// TetheringConfigurationTest.java.
final String value = DeviceConfig.getProperty(
NAMESPACE_CONNECTIVITY, OVERRIDE_TETHER_ENABLE_BPF_OFFLOAD);
return (value != null) ? Boolean.parseBoolean(value) : resourceValue;
}
private boolean getEnableLegacyDhcpServer(final Resources res) {
return getResourceBoolean(res, R.bool.config_tether_enable_legacy_dhcp_server)
return getResourceBoolean(
res, R.bool.config_tether_enable_legacy_dhcp_server, false /** default value */)
|| getDeviceConfigBoolean(TETHER_ENABLE_LEGACY_DHCP_SERVER);
}