Merge changes Ie73ba058,I4393afcb,Ifebd946e,Ib12ee882,Ia171b779
* changes: fix com.android.server.net.NetworkStatsFactoryTest#testDoubleClatAccounting100MBDownload fix com.android.server.net.NetworkStatsFactoryTest#testDoubleClatAccounting fix com.android.server.net.NetworkStatsFactoryTest#testDoubleClatAccountingSimple fix android.net.NetworkStatsTest#testApply464xlatAdjustments NetworkStats - no need for xt_qtaguid clat bw fixups
This commit is contained in:
Maciej Żenczykowski
@@ -1047,22 +1047,22 @@ public final class NetworkStats implements Parcelable {
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}
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/**
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* Calculate and apply adjustments to captured statistics for 464xlat traffic counted twice.
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* Calculate and apply adjustments to captured statistics for 464xlat traffic.
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*
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* <p>This mutates both base and stacked traffic stats, to account respectively for
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* double-counted traffic and IPv4/IPv6 header size difference.
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* <p>This mutates stacked traffic stats, to account for IPv4/IPv6 header size difference.
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*
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* <p>For 464xlat traffic, xt_qtaguid sees every IPv4 packet twice, once as a native IPv4
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* packet on the stacked interface, and once as translated to an IPv6 packet on the
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* base interface. For correct stats accounting on the base interface, if using xt_qtaguid,
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* every rx 464xlat packet needs to be subtracted from the root UID on the base interface
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* (http://b/12249687, http:/b/33681750), and every tx 464xlat packet which was counted onto
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* clat uid should be ignored.
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* <p>UID stats, which are only accounted on the stacked interface, need to be increased
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* by 20 bytes/packet to account for translation overhead.
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*
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* As for eBPF, the per uid stats is collected by different hook, the rx packets on base
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* interface will not be counted. Thus, the adjustment on root uid is not needed. However, the
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* tx traffic counted in the same way xt_qtaguid does, so the traffic on clat uid still
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* needs to be ignored.
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* <p>The potential additional overhead of 8 bytes/packet for ip fragments is ignored.
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*
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* <p>Interface stats need to sum traffic on both stacked and base interface because:
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* - eBPF offloaded packets appear only on the stacked interface
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* - Non-offloaded ingress packets appear only on the stacked interface
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* (due to iptables raw PREROUTING drop rules)
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* - Non-offloaded egress packets appear only on the stacked interface
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* (due to ignoring traffic from clat daemon by uid match)
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* (and of course the 20 bytes/packet overhead needs to be applied to stacked interface stats)
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*
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* <p>This method will behave fine if {@code stackedIfaces} is an non-synchronized but add-only
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* {@code ConcurrentHashMap}
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@@ -1074,46 +1074,34 @@ public final class NetworkStats implements Parcelable {
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*/
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public static void apply464xlatAdjustments(NetworkStats baseTraffic,
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NetworkStats stackedTraffic, Map<String, String> stackedIfaces, boolean useBpfStats) {
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// Total 464xlat traffic to subtract from uid 0 on all base interfaces.
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// stackedIfaces may grow afterwards, but NetworkStats will just be resized automatically.
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final NetworkStats adjustments = new NetworkStats(0, stackedIfaces.size());
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// For recycling
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Entry entry = null;
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Entry adjust = new NetworkStats.Entry(IFACE_ALL, 0, 0, 0, 0, 0, 0, 0L, 0L, 0L, 0L, 0L);
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for (int i = 0; i < stackedTraffic.size; i++) {
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entry = stackedTraffic.getValues(i, entry);
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if (entry.iface == null || !entry.iface.startsWith(CLATD_INTERFACE_PREFIX)) {
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continue;
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}
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final String baseIface = stackedIfaces.get(entry.iface);
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if (baseIface == null) {
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continue;
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}
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// Subtract xt_qtaguid 464lat rx traffic seen for the root UID on the current base
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// interface. As for eBPF, the per uid stats is collected by different hook, the rx
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// packets on base interface will not be counted.
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adjust.iface = baseIface;
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if (!useBpfStats) {
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adjust.rxBytes = -(entry.rxBytes + entry.rxPackets * IPV4V6_HEADER_DELTA);
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adjust.rxPackets = -entry.rxPackets;
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}
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adjustments.combineValues(adjust);
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if (entry == null) continue;
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if (entry.iface == null) continue;
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if (!entry.iface.startsWith(CLATD_INTERFACE_PREFIX)) continue;
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// For 464xlat traffic, per uid stats only counts the bytes of the native IPv4 packet
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// sent on the stacked interface with prefix "v4-" and drops the IPv6 header size after
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// unwrapping. To account correctly for on-the-wire traffic, add the 20 additional bytes
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// difference for all packets (http://b/12249687, http:/b/33681750).
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//
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// Note: this doesn't account for LRO/GRO/GSO/TSO (ie. >mtu) traffic correctly, nor
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// does it correctly account for the 8 extra bytes in the IPv6 fragmentation header.
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//
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// While the ebpf code path does try to simulate proper post segmentation packet
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// counts, we have nothing of the sort of xt_qtaguid stats.
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entry.rxBytes += entry.rxPackets * IPV4V6_HEADER_DELTA;
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entry.txBytes += entry.txPackets * IPV4V6_HEADER_DELTA;
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stackedTraffic.setValues(i, entry);
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}
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// Traffic on clat uid is v6 tx traffic that is already counted with app uid on the stacked
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// v4 interface, so it needs to be removed to avoid double-counting.
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// Theoretically there should be no traffic accounted to the clat daemon's uid:
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// see ebpf program 'netd.c's early returns
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// and iptables '-m owner --uid-owner clat -j RETURN' rules prior to accounting
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// TODO: remove this - should definitely be safe once ebpf only.
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baseTraffic.removeUids(new int[] {CLAT_UID});
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baseTraffic.combineAllValues(adjustments);
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}
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/**
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@@ -909,8 +909,8 @@ public class NetworkStatsTest {
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13805 /* txPackets */,
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0 /* operations */);
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// Traffic measured for the root uid on the base interface if eBPF is in use.
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final NetworkStats.Entry ebpfRootUidEntry = new NetworkStats.Entry(
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// Traffic measured for the root uid on the base interface.
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final NetworkStats.Entry rootUidEntry = new NetworkStats.Entry(
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baseIface, rootUid, SET_DEFAULT, TAG_NONE,
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163577 /* rxBytes */,
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187 /* rxPackets */,
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@@ -918,17 +918,6 @@ public class NetworkStatsTest {
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97 /* txPackets */,
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0 /* operations */);
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// Traffic measured for the root uid on the base interface if xt_qtaguid is in use.
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// Incorrectly includes appEntry's bytes and packets, plus IPv4-IPv6 translation
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// overhead (20 bytes per packet), in rx direction.
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final NetworkStats.Entry xtRootUidEntry = new NetworkStats.Entry(
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baseIface, rootUid, SET_DEFAULT, TAG_NONE,
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31113087 /* rxBytes */,
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22588 /* rxPackets */,
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17607 /* txBytes */,
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97 /* txPackets */,
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0 /* operations */);
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final NetworkStats.Entry otherEntry = new NetworkStats.Entry(
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otherIface, appUid, SET_DEFAULT, TAG_NONE,
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2600 /* rxBytes */,
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@@ -939,12 +928,12 @@ public class NetworkStatsTest {
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final NetworkStats statsXt = new NetworkStats(TEST_START, 3)
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.insertEntry(appEntry)
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.insertEntry(xtRootUidEntry)
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.insertEntry(rootUidEntry)
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.insertEntry(otherEntry);
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final NetworkStats statsEbpf = new NetworkStats(TEST_START, 3)
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.insertEntry(appEntry)
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.insertEntry(ebpfRootUidEntry)
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.insertEntry(rootUidEntry)
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.insertEntry(otherEntry);
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statsXt.apply464xlatAdjustments(stackedIface, false);
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@@ -446,7 +446,7 @@ public class NetworkStatsFactoryTest extends NetworkStatsBaseTest {
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assertStatsEntry(stats, "v4-wlan0", 1000, SET_DEFAULT, 0x0, 30812L, 2310L);
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assertStatsEntry(stats, "v4-wlan0", 10102, SET_DEFAULT, 0x0, 10022L, 3330L);
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assertStatsEntry(stats, "v4-wlan0", 10060, SET_DEFAULT, 0x0, 9532772L, 254112L);
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assertStatsEntry(stats, "wlan0", 0, SET_DEFAULT, 0x0, 15229L, 0L);
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assertStatsEntry(stats, "wlan0", 0, SET_DEFAULT, 0x0, 0L, 0L);
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assertStatsEntry(stats, "wlan0", 1000, SET_DEFAULT, 0x0, 6126L, 2013L);
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assertStatsEntry(stats, "wlan0", 10013, SET_DEFAULT, 0x0, 0L, 144L);
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assertStatsEntry(stats, "wlan0", 10018, SET_DEFAULT, 0x0, 5980263L, 167667L);
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@@ -468,9 +468,7 @@ public class NetworkStatsFactoryTest extends NetworkStatsBaseTest {
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long appRxBytesAfter = 439237478L;
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assertEquals("App traffic should be ~100MB", 110553449, appRxBytesAfter - appRxBytesBefore);
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long rootRxBytesBefore = 1394011L;
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long rootRxBytesAfter = 1398634L;
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assertEquals("UID 0 traffic should be ~0", 4623, rootRxBytesAfter - rootRxBytesBefore);
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long rootRxBytes = 330187296L;
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mFactory.noteStackedIface("v4-wlan0", "wlan0");
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NetworkStats stats;
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@@ -478,12 +476,12 @@ public class NetworkStatsFactoryTest extends NetworkStatsBaseTest {
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// Stats snapshot before the download
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stats = parseDetailedStats(R.raw.xt_qtaguid_with_clat_100mb_download_before);
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assertStatsEntry(stats, "v4-wlan0", 10106, SET_FOREGROUND, 0x0, appRxBytesBefore, 5199872L);
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assertStatsEntry(stats, "wlan0", 0, SET_DEFAULT, 0x0, rootRxBytesBefore, 0L);
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assertStatsEntry(stats, "wlan0", 0, SET_DEFAULT, 0x0, rootRxBytes, 0L);
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// Stats snapshot after the download
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stats = parseDetailedStats(R.raw.xt_qtaguid_with_clat_100mb_download_after);
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assertStatsEntry(stats, "v4-wlan0", 10106, SET_FOREGROUND, 0x0, appRxBytesAfter, 7867488L);
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assertStatsEntry(stats, "wlan0", 0, SET_DEFAULT, 0x0, rootRxBytesAfter, 0L);
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assertStatsEntry(stats, "wlan0", 0, SET_DEFAULT, 0x0, rootRxBytes, 0L);
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}
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/**
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@@ -7,7 +7,7 @@ idx iface acct_tag_hex uid_tag_int cnt_set rx_bytes rx_packets tx_bytes tx_packe
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7 v4-wlan0 0x0 10060 1 1448660 1041 31192 753 1448660 1041 0 0 0 0 31192 753 0 0 0 0
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8 v4-wlan0 0x0 10102 0 9702 16 2870 23 9702 16 0 0 0 0 2870 23 0 0 0 0
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9 v4-wlan0 0x0 10102 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
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10 wlan0 0x0 0 0 11058671 7892 0 0 11043898 7811 13117 61 1656 20 0 0 0 0 0 0
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10 wlan0 0x0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
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11 wlan0 0x0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
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12 wlan0 0x0 1000 0 6126 13 2013 16 5934 11 192 2 0 0 1821 14 192 2 0 0
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13 wlan0 0x0 1000 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
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@@ -9,7 +9,7 @@ idx iface acct_tag_hex uid_tag_int cnt_set rx_bytes rx_packets tx_bytes tx_packe
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9 v4-wlan0 0x0 10057 1 728 7 392 7 0 0 728 7 0 0 0 0 392 7 0 0
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10 v4-wlan0 0x0 10106 0 2232 18 2232 18 0 0 2232 18 0 0 0 0 2232 18 0 0
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11 v4-wlan0 0x0 10106 1 432952718 314238 5442288 121260 432950238 314218 2480 20 0 0 5433900 121029 8388 231 0 0
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12 wlan0 0x0 0 0 440746376 329772 0 0 439660007 315369 232001 1276 854368 13127 0 0 0 0 0 0
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12 wlan0 0x0 0 0 330187296 250652 0 0 329106990 236273 226202 1255 854104 13124 0 0 0 0 0 0
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13 wlan0 0x0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
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14 wlan0 0x0 1000 0 77113 272 56151 575 77113 272 0 0 0 0 19191 190 36960 385 0 0
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15 wlan0 0x0 1000 1 20227 80 8356 72 18539 74 1688 6 0 0 7562 66 794 6 0 0
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@@ -1,5 +1,5 @@
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idx iface acct_tag_hex uid_tag_int cnt_set rx_bytes rx_packets tx_bytes tx_packets rx_tcp_bytes rx_tcp_packets rx_udp_bytes rx_udp_packets rx_other_bytes rx_other_packets tx_tcp_bytes tx_tcp_packets tx_udp_bytes tx_udp_packets tx_other_bytes tx_other_packets
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2 v4-wlan0 0x0 10060 0 42600 213 4100 41 42600 213 0 0 0 0 4100 41 0 0 0 0
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3 v4-wlan0 0x0 10060 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
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4 wlan0 0x0 0 0 46860 213 0 0 46860 213 0 0 0 0 0 0 0 0 0 0
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4 wlan0 0x0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
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5 wlan0 0x0 1029 0 0 0 4920 41 0 0 0 0 0 0 4920 41 0 0 0 0
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