diff --git a/server/TrafficController.cpp b/server/TrafficController.cpp
index 7e3b005..c18ac08 100644
--- a/server/TrafficController.cpp
+++ b/server/TrafficController.cpp
@@ -387,7 +387,7 @@
         return base::Result<void>();
     };
     auto configuration = mConfigurationMap.readValue(CURRENT_STATS_MAP_CONFIGURATION_KEY);
-    if (!configuration) {
+    if (!configuration.ok()) {
         ALOGE("Failed to get current configuration: %s, fd: %d",
               strerror(configuration.error().code()), mConfigurationMap.getMap().get());
         return -configuration.error().code();
@@ -400,7 +400,7 @@
     BpfMap<StatsKey, StatsValue>& currentMap =
             (configuration.value() == SELECT_MAP_A) ? mStatsMapA : mStatsMapB;
     base::Result<void> res = currentMap.iterate(countUidStatsEntries);
-    if (!res) {
+    if (!res.ok()) {
         ALOGE("Failed to count the stats entry in map %d: %s", currentMap.getMap().get(),
               strerror(res.error().code()));
         return -res.error().code();
@@ -419,7 +419,7 @@
     // program in kernel only read this map, and is protected by rcu read lock. It
     // should be fine to cocurrently update the map while eBPF program is running.
     res = mCookieTagMap.writeValue(sock_cookie, newKey, BPF_ANY);
-    if (!res) {
+    if (!res.ok()) {
         ALOGE("Failed to tag the socket: %s, fd: %d", strerror(res.error().code()),
               mCookieTagMap.getMap().get());
         return -res.error().code();
@@ -437,7 +437,7 @@
 
     if (sock_cookie == NONEXISTENT_COOKIE) return -errno;
     base::Result<void> res = mCookieTagMap.deleteValue(sock_cookie);
-    if (!res) {
+    if (!res.ok()) {
         ALOGE("Failed to untag socket: %s\n", strerror(res.error().code()));
         return -res.error().code();
     }
@@ -495,7 +495,7 @@
                                                        BpfMap<uint64_t, UidTagValue>& map) {
         if (value.uid == uid && (value.tag == tag || tag == 0)) {
             auto res = map.deleteValue(key);
-            if (res || (res.error().code() == ENOENT)) {
+            if (res.ok() || (res.error().code() == ENOENT)) {
                 return base::Result<void>();
             }
             ALOGE("Failed to delete data(cookie = %" PRIu64 "): %s\n", key,
@@ -511,7 +511,7 @@
                                                        BpfMap<StatsKey, StatsValue>& map) {
         if (key.uid == uid && (key.tag == tag || tag == 0)) {
             auto res = map.deleteValue(key);
-            if (res || (res.error().code() == ENOENT)) {
+            if (res.ok() || (res.error().code() == ENOENT)) {
                 //Entry is deleted, use the current key to get a new nextKey;
                 return base::Result<void>();
             }
@@ -527,7 +527,7 @@
     if (tag != 0) return 0;
 
     auto res = mUidCounterSetMap.deleteValue(uid);
-    if (!res && res.error().code() != ENOENT) {
+    if (!res.ok() && res.error().code() != ENOENT) {
         ALOGE("Failed to delete counterSet data(uid=%u, tag=%u): %s\n", uid, tag,
               strerror(res.error().code()));
     }
@@ -536,7 +536,7 @@
                                         BpfMap<uint32_t, StatsValue>& map) -> base::Result<void> {
         if (key == uid) {
             auto res = map.deleteValue(key);
-            if (res || (res.error().code() == ENOENT)) {
+            if (res.ok() || (res.error().code() == ENOENT)) {
                 return {};
             }
             ALOGE("Failed to delete data(uid=%u): %s", key, strerror(res.error().code()));
@@ -593,7 +593,7 @@
 Status TrafficController::removeRule(BpfMap<uint32_t, UidOwnerValue>& map, uint32_t uid,
                                      UidOwnerMatchType match) {
     auto oldMatch = map.readValue(uid);
-    if (oldMatch) {
+    if (oldMatch.ok()) {
         UidOwnerValue newMatch = {
                 .iif = (match == IIF_MATCH) ? 0 : oldMatch.value().iif,
                 .rule = static_cast<uint8_t>(oldMatch.value().rule & ~match),
@@ -618,7 +618,7 @@
         return statusFromErrno(EINVAL, "Non-interface match must have zero interface index");
     }
     auto oldMatch = map.readValue(uid);
-    if (oldMatch) {
+    if (oldMatch.ok()) {
         UidOwnerValue newMatch = {
                 .iif = iif ? iif : oldMatch.value().iif,
                 .rule = static_cast<uint8_t>(oldMatch.value().rule | match),
@@ -785,7 +785,7 @@
     std::lock_guard guard(mMutex);
     uint32_t key = UID_RULES_CONFIGURATION_KEY;
     auto oldConfiguration = mConfigurationMap.readValue(key);
-    if (!oldConfiguration) {
+    if (!oldConfiguration.ok()) {
         ALOGE("Cannot read the old configuration from map: %s",
               oldConfiguration.error().message().c_str());
         return -oldConfiguration.error().code();
@@ -828,7 +828,7 @@
 
     uint32_t key = CURRENT_STATS_MAP_CONFIGURATION_KEY;
     auto oldConfiguration = mConfigurationMap.readValue(key);
-    if (!oldConfiguration) {
+    if (!oldConfiguration.ok()) {
         ALOGE("Cannot read the old configuration from map: %s",
               oldConfiguration.error().message().c_str());
         return Status(oldConfiguration.error().code(), oldConfiguration.error().message());
@@ -840,7 +840,7 @@
     uint8_t newConfigure = (oldConfiguration.value() == SELECT_MAP_A) ? SELECT_MAP_B : SELECT_MAP_A;
     auto res = mConfigurationMap.writeValue(CURRENT_STATS_MAP_CONFIGURATION_KEY, newConfigure,
                                             BPF_EXIST);
-    if (!res) {
+    if (!res.ok()) {
         ALOGE("Failed to toggle the stats map: %s", strerror(res.error().code()));
         return res;
     }
@@ -1003,7 +1003,7 @@
         return base::Result<void>();
     };
     base::Result<void> res = mCookieTagMap.iterateWithValue(printCookieTagInfo);
-    if (!res) {
+    if (!res.ok()) {
         dw.println("mCookieTagMap print end with error: %s", res.error().message().c_str());
     }
 
@@ -1015,7 +1015,7 @@
         return base::Result<void>();
     };
     res = mUidCounterSetMap.iterateWithValue(printUidInfo);
-    if (!res) {
+    if (!res.ok()) {
         dw.println("mUidCounterSetMap print end with error: %s", res.error().message().c_str());
     }
 
@@ -1029,7 +1029,7 @@
         return base::Result<void>();
     };
     res = mAppUidStatsMap.iterateWithValue(printAppUidStatsInfo);
-    if (!res) {
+    if (!res.ok()) {
         dw.println("mAppUidStatsMap print end with error: %s", res.error().message().c_str());
     }
 
@@ -1041,7 +1041,7 @@
                                             const BpfMap<StatsKey, StatsValue>&) {
         uint32_t ifIndex = key.ifaceIndex;
         auto ifname = mIfaceIndexNameMap.readValue(ifIndex);
-        if (!ifname) {
+        if (!ifname.ok()) {
             ifname = IfaceValue{"unknown"};
         }
         dw.println("%u %s 0x%x %u %u %" PRIu64 " %" PRIu64 " %" PRIu64 " %" PRIu64, ifIndex,
@@ -1050,14 +1050,14 @@
         return base::Result<void>();
     };
     res = mStatsMapA.iterateWithValue(printStatsInfo);
-    if (!res) {
+    if (!res.ok()) {
         dw.println("mStatsMapA print end with error: %s", res.error().message().c_str());
     }
 
     // Print TagStatsMap content.
     dumpBpfMap("mStatsMapB", dw, statsHeader);
     res = mStatsMapB.iterateWithValue(printStatsInfo);
-    if (!res) {
+    if (!res.ok()) {
         dw.println("mStatsMapB print end with error: %s", res.error().message().c_str());
     }
 
@@ -1070,7 +1070,7 @@
         return base::Result<void>();
     };
     res = mIfaceIndexNameMap.iterateWithValue(printIfaceNameInfo);
-    if (!res) {
+    if (!res.ok()) {
         dw.println("mIfaceIndexNameMap print end with error: %s", res.error().message().c_str());
     }
 
@@ -1081,7 +1081,7 @@
     const auto printIfaceStatsInfo = [&dw, this](const uint32_t& key, const StatsValue& value,
                                                  const BpfMap<uint32_t, StatsValue>&) {
         auto ifname = mIfaceIndexNameMap.readValue(key);
-        if (!ifname) {
+        if (!ifname.ok()) {
             ifname = IfaceValue{"unknown"};
         }
         dw.println("%u %s %" PRIu64 " %" PRIu64 " %" PRIu64 " %" PRIu64, key, ifname.value().name,
@@ -1089,7 +1089,7 @@
         return base::Result<void>();
     };
     res = mIfaceStatsMap.iterateWithValue(printIfaceStatsInfo);
-    if (!res) {
+    if (!res.ok()) {
         dw.println("mIfaceStatsMap print end with error: %s", res.error().message().c_str());
     }
 
@@ -1097,7 +1097,7 @@
 
     uint32_t key = UID_RULES_CONFIGURATION_KEY;
     auto configuration = mConfigurationMap.readValue(key);
-    if (configuration) {
+    if (configuration.ok()) {
         dw.println("current ownerMatch configuration: %d%s", configuration.value(),
                    uidMatchTypeToString(configuration.value()).c_str());
     } else {
@@ -1107,7 +1107,7 @@
 
     key = CURRENT_STATS_MAP_CONFIGURATION_KEY;
     configuration = mConfigurationMap.readValue(key);
-    if (configuration) {
+    if (configuration.ok()) {
         const char* statsMapDescription = "???";
         switch (configuration.value()) {
             case SELECT_MAP_A:
@@ -1129,7 +1129,7 @@
                                                const BpfMap<uint32_t, UidOwnerValue>&) {
         if (value.rule & IIF_MATCH) {
             auto ifname = mIfaceIndexNameMap.readValue(value.iif);
-            if (ifname) {
+            if (ifname.ok()) {
                 dw.println("%u %s %s", key, uidMatchTypeToString(value.rule).c_str(),
                            ifname.value().name);
             } else {
@@ -1141,7 +1141,7 @@
         return base::Result<void>();
     };
     res = mUidOwnerMap.iterateWithValue(printUidMatchInfo);
-    if (!res) {
+    if (!res.ok()) {
         dw.println("mUidOwnerMap print end with error: %s", res.error().message().c_str());
     }
     dumpBpfMap("mUidPermissionMap", dw, "");
@@ -1151,7 +1151,7 @@
         return base::Result<void>();
     };
     res = mUidPermissionMap.iterateWithValue(printUidPermissionInfo);
-    if (!res) {
+    if (!res.ok()) {
         dw.println("mUidPermissionMap print end with error: %s", res.error().message().c_str());
     }