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1039 lines
43 KiB
1039 lines
43 KiB
/*
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* Copyright (C) 2017 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#define LOG_TAG "TrafficController"
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#include <inttypes.h>
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#include <linux/bpf.h>
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#include <linux/if_ether.h>
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#include <linux/in.h>
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#include <linux/inet_diag.h>
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#include <linux/netlink.h>
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#include <linux/sock_diag.h>
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#include <linux/unistd.h>
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#include <net/if.h>
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#include <stdlib.h>
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#include <string.h>
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#include <sys/socket.h>
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#include <sys/stat.h>
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#include <sys/types.h>
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#include <sys/utsname.h>
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#include <sys/wait.h>
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#include <mutex>
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#include <unordered_set>
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#include <vector>
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#include <android-base/stringprintf.h>
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#include <android-base/strings.h>
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#include <android-base/unique_fd.h>
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#include <netdutils/StatusOr.h>
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#include <netdutils/Misc.h>
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#include <netdutils/Syscalls.h>
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#include <processgroup/processgroup.h>
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#include "TrafficController.h"
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#include "bpf/BpfMap.h"
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#include "FirewallController.h"
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#include "InterfaceController.h"
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#include "NetlinkListener.h"
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#include "netdutils/DumpWriter.h"
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#include "qtaguid/qtaguid.h"
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namespace android {
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namespace net {
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using base::StringPrintf;
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using base::unique_fd;
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using bpf::getSocketCookie;
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using bpf::NONEXISTENT_COOKIE;
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using bpf::OVERFLOW_COUNTERSET;
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using bpf::retrieveProgram;
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using bpf::synchronizeKernelRCU;
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using netdutils::DumpWriter;
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using netdutils::extract;
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using netdutils::ScopedIndent;
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using netdutils::Slice;
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using netdutils::sSyscalls;
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using netdutils::Status;
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using netdutils::statusFromErrno;
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using netdutils::StatusOr;
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using netdutils::status::ok;
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constexpr int kSockDiagMsgType = SOCK_DIAG_BY_FAMILY;
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constexpr int kSockDiagDoneMsgType = NLMSG_DONE;
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constexpr int PER_UID_STATS_ENTRIES_LIMIT = 500;
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// At most 90% of the stats map may be used by tagged traffic entries. This ensures
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// that 10% of the map is always available to count untagged traffic, one entry per UID.
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// Otherwise, apps would be able to avoid data usage accounting entirely by filling up the
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// map with tagged traffic entries.
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constexpr int TOTAL_UID_STATS_ENTRIES_LIMIT = STATS_MAP_SIZE * 0.9;
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static_assert(BPF_PERMISSION_INTERNET == INetd::PERMISSION_INTERNET,
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"Mismatch between BPF and AIDL permissions: PERMISSION_INTERNET");
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static_assert(BPF_PERMISSION_UPDATE_DEVICE_STATS == INetd::PERMISSION_UPDATE_DEVICE_STATS,
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"Mismatch between BPF and AIDL permissions: PERMISSION_UPDATE_DEVICE_STATS");
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static_assert(STATS_MAP_SIZE - TOTAL_UID_STATS_ENTRIES_LIMIT > 100,
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"The limit for stats map is to high, stats data may be lost due to overflow");
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#define FLAG_MSG_TRANS(result, flag, value) \
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do { \
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if ((value) & (flag)) { \
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(result).append(" " #flag); \
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(value) &= ~(flag); \
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} \
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} while (0)
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const std::string uidMatchTypeToString(uint8_t match) {
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std::string matchType;
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FLAG_MSG_TRANS(matchType, HAPPY_BOX_MATCH, match);
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FLAG_MSG_TRANS(matchType, PENALTY_BOX_MATCH, match);
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FLAG_MSG_TRANS(matchType, DOZABLE_MATCH, match);
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FLAG_MSG_TRANS(matchType, STANDBY_MATCH, match);
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FLAG_MSG_TRANS(matchType, POWERSAVE_MATCH, match);
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FLAG_MSG_TRANS(matchType, RESTRICTED_MATCH, match);
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FLAG_MSG_TRANS(matchType, IIF_MATCH, match);
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if (match) {
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return StringPrintf("Unknown match: %u", match);
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}
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return matchType;
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}
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bool TrafficController::hasUpdateDeviceStatsPermission(uid_t uid) {
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// This implementation is the same logic as method ActivityManager#checkComponentPermission.
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// It implies that the calling uid can never be the same as PER_USER_RANGE.
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uint32_t appId = uid % PER_USER_RANGE;
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return ((appId == AID_ROOT) || (appId == AID_SYSTEM) ||
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mPrivilegedUser.find(appId) != mPrivilegedUser.end());
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}
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const std::string UidPermissionTypeToString(int permission) {
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if (permission == INetd::PERMISSION_NONE) {
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return "PERMISSION_NONE";
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}
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if (permission == INetd::PERMISSION_UNINSTALLED) {
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// This should never appear in the map, complain loudly if it does.
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return "PERMISSION_UNINSTALLED error!";
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}
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std::string permissionType;
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FLAG_MSG_TRANS(permissionType, BPF_PERMISSION_INTERNET, permission);
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FLAG_MSG_TRANS(permissionType, BPF_PERMISSION_UPDATE_DEVICE_STATS, permission);
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if (permission) {
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return StringPrintf("Unknown permission: %u", permission);
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}
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return permissionType;
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}
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StatusOr<std::unique_ptr<NetlinkListenerInterface>> TrafficController::makeSkDestroyListener() {
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const auto& sys = sSyscalls.get();
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ASSIGN_OR_RETURN(auto event, sys.eventfd(0, EFD_CLOEXEC));
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const int domain = AF_NETLINK;
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const int type = SOCK_DGRAM | SOCK_CLOEXEC | SOCK_NONBLOCK;
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const int protocol = NETLINK_INET_DIAG;
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ASSIGN_OR_RETURN(auto sock, sys.socket(domain, type, protocol));
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// TODO: if too many sockets are closed too quickly, we can overflow the socket buffer, and
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// some entries in mCookieTagMap will not be freed. In order to fix this we would need to
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// periodically dump all sockets and remove the tag entries for sockets that have been closed.
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// For now, set a large-enough buffer that we can close hundreds of sockets without getting
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// ENOBUFS and leaking mCookieTagMap entries.
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int rcvbuf = 512 * 1024;
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auto ret = sys.setsockopt(sock, SOL_SOCKET, SO_RCVBUF, &rcvbuf, sizeof(rcvbuf));
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if (!ret.ok()) {
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ALOGW("Failed to set SkDestroyListener buffer size to %d: %s", rcvbuf, ret.msg().c_str());
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}
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sockaddr_nl addr = {
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.nl_family = AF_NETLINK,
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.nl_groups = 1 << (SKNLGRP_INET_TCP_DESTROY - 1) | 1 << (SKNLGRP_INET_UDP_DESTROY - 1) |
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1 << (SKNLGRP_INET6_TCP_DESTROY - 1) | 1 << (SKNLGRP_INET6_UDP_DESTROY - 1)};
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RETURN_IF_NOT_OK(sys.bind(sock, addr));
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const sockaddr_nl kernel = {.nl_family = AF_NETLINK};
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RETURN_IF_NOT_OK(sys.connect(sock, kernel));
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std::unique_ptr<NetlinkListenerInterface> listener =
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std::make_unique<NetlinkListener>(std::move(event), std::move(sock), "SkDestroyListen");
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return listener;
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}
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TrafficController::TrafficController()
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: mPerUidStatsEntriesLimit(PER_UID_STATS_ENTRIES_LIMIT),
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mTotalUidStatsEntriesLimit(TOTAL_UID_STATS_ENTRIES_LIMIT) {}
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TrafficController::TrafficController(uint32_t perUidLimit, uint32_t totalLimit)
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: mPerUidStatsEntriesLimit(perUidLimit), mTotalUidStatsEntriesLimit(totalLimit) {}
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Status TrafficController::initMaps() {
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std::lock_guard guard(mMutex);
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RETURN_IF_NOT_OK(mCookieTagMap.init(COOKIE_TAG_MAP_PATH));
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RETURN_IF_NOT_OK(mUidCounterSetMap.init(UID_COUNTERSET_MAP_PATH));
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RETURN_IF_NOT_OK(mAppUidStatsMap.init(APP_UID_STATS_MAP_PATH));
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RETURN_IF_NOT_OK(mStatsMapA.init(STATS_MAP_A_PATH));
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RETURN_IF_NOT_OK(mStatsMapB.init(STATS_MAP_B_PATH));
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RETURN_IF_NOT_OK(mIfaceIndexNameMap.init(IFACE_INDEX_NAME_MAP_PATH));
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RETURN_IF_NOT_OK(mIfaceStatsMap.init(IFACE_STATS_MAP_PATH));
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RETURN_IF_NOT_OK(mConfigurationMap.init(CONFIGURATION_MAP_PATH));
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RETURN_IF_NOT_OK(
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mConfigurationMap.writeValue(UID_RULES_CONFIGURATION_KEY, DEFAULT_CONFIG, BPF_ANY));
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RETURN_IF_NOT_OK(mConfigurationMap.writeValue(CURRENT_STATS_MAP_CONFIGURATION_KEY, SELECT_MAP_A,
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BPF_ANY));
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RETURN_IF_NOT_OK(mUidOwnerMap.init(UID_OWNER_MAP_PATH));
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RETURN_IF_NOT_OK(mUidOwnerMap.clear());
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RETURN_IF_NOT_OK(mUidPermissionMap.init(UID_PERMISSION_MAP_PATH));
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return netdutils::status::ok;
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}
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static Status attachProgramToCgroup(const char* programPath, const unique_fd& cgroupFd,
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bpf_attach_type type) {
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unique_fd cgroupProg(retrieveProgram(programPath));
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if (cgroupProg == -1) {
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int ret = errno;
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ALOGE("Failed to get program from %s: %s", programPath, strerror(ret));
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return statusFromErrno(ret, "cgroup program get failed");
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}
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if (android::bpf::attachProgram(type, cgroupProg, cgroupFd)) {
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int ret = errno;
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ALOGE("Program from %s attach failed: %s", programPath, strerror(ret));
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return statusFromErrno(ret, "program attach failed");
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}
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return netdutils::status::ok;
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}
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static Status initPrograms() {
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std::string cg2_path;
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if (!CgroupGetControllerPath(CGROUPV2_CONTROLLER_NAME, &cg2_path)) {
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int ret = errno;
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ALOGE("Failed to find cgroup v2 root");
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return statusFromErrno(ret, "Failed to find cgroup v2 root");
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}
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unique_fd cg_fd(open(cg2_path.c_str(), O_DIRECTORY | O_RDONLY | O_CLOEXEC));
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if (cg_fd == -1) {
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int ret = errno;
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ALOGE("Failed to open the cgroup directory: %s", strerror(ret));
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return statusFromErrno(ret, "Open the cgroup directory failed");
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}
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RETURN_IF_NOT_OK(attachProgramToCgroup(BPF_EGRESS_PROG_PATH, cg_fd, BPF_CGROUP_INET_EGRESS));
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RETURN_IF_NOT_OK(attachProgramToCgroup(BPF_INGRESS_PROG_PATH, cg_fd, BPF_CGROUP_INET_INGRESS));
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// For the devices that support cgroup socket filter, the socket filter
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// should be loaded successfully by bpfloader. So we attach the filter to
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// cgroup if the program is pinned properly.
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// TODO: delete the if statement once all devices should support cgroup
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// socket filter (ie. the minimum kernel version required is 4.14).
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if (!access(CGROUP_SOCKET_PROG_PATH, F_OK)) {
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RETURN_IF_NOT_OK(
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attachProgramToCgroup(CGROUP_SOCKET_PROG_PATH, cg_fd, BPF_CGROUP_INET_SOCK_CREATE));
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}
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return netdutils::status::ok;
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}
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Status TrafficController::start() {
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/* When netd restarts from a crash without total system reboot, the program
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* is still attached to the cgroup, detach it so the program can be freed
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* and we can load and attach new program into the target cgroup.
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*
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* TODO: Scrape existing socket when run-time restart and clean up the map
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* if the socket no longer exist
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*/
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RETURN_IF_NOT_OK(initMaps());
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RETURN_IF_NOT_OK(initPrograms());
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// Fetch the list of currently-existing interfaces. At this point NetlinkHandler is
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// already running, so it will call addInterface() when any new interface appears.
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std::map<std::string, uint32_t> ifacePairs;
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ASSIGN_OR_RETURN(ifacePairs, InterfaceController::getIfaceList());
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for (const auto& ifacePair:ifacePairs) {
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addInterface(ifacePair.first.c_str(), ifacePair.second);
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}
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auto result = makeSkDestroyListener();
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if (!isOk(result)) {
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ALOGE("Unable to create SkDestroyListener: %s", toString(result).c_str());
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} else {
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mSkDestroyListener = std::move(result.value());
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}
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// Rx handler extracts nfgenmsg looks up and invokes registered dispatch function.
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const auto rxHandler = [this](const nlmsghdr&, const Slice msg) {
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std::lock_guard guard(mMutex);
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inet_diag_msg diagmsg = {};
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if (extract(msg, diagmsg) < sizeof(inet_diag_msg)) {
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ALOGE("Unrecognized netlink message: %s", toString(msg).c_str());
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return;
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}
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uint64_t sock_cookie = static_cast<uint64_t>(diagmsg.id.idiag_cookie[0]) |
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(static_cast<uint64_t>(diagmsg.id.idiag_cookie[1]) << 32);
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Status s = mCookieTagMap.deleteValue(sock_cookie);
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if (!isOk(s) && s.code() != ENOENT) {
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ALOGE("Failed to delete cookie %" PRIx64 ": %s", sock_cookie, toString(s).c_str());
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return;
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}
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};
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expectOk(mSkDestroyListener->subscribe(kSockDiagMsgType, rxHandler));
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// In case multiple netlink message comes in as a stream, we need to handle the rxDone message
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// properly.
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const auto rxDoneHandler = [](const nlmsghdr&, const Slice msg) {
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// Ignore NLMSG_DONE messages
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inet_diag_msg diagmsg = {};
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extract(msg, diagmsg);
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};
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expectOk(mSkDestroyListener->subscribe(kSockDiagDoneMsgType, rxDoneHandler));
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return netdutils::status::ok;
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}
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int TrafficController::tagSocket(int sockFd, uint32_t tag, uid_t uid, uid_t callingUid) {
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std::lock_guard guard(mMutex);
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if (uid != callingUid && !hasUpdateDeviceStatsPermission(callingUid)) {
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return -EPERM;
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}
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uint64_t sock_cookie = getSocketCookie(sockFd);
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if (sock_cookie == NONEXISTENT_COOKIE) return -errno;
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UidTagValue newKey = {.uid = (uint32_t)uid, .tag = tag};
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uint32_t totalEntryCount = 0;
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uint32_t perUidEntryCount = 0;
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// Now we go through the stats map and count how many entries are associated
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// with target uid. If the uid entry hit the limit for each uid, we block
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// the request to prevent the map from overflow. It is safe here to iterate
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// over the map since when mMutex is hold, system server cannot toggle
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// the live stats map and clean it. So nobody can delete entries from the map.
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const auto countUidStatsEntries = [uid, &totalEntryCount, &perUidEntryCount](
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const StatsKey& key,
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const BpfMap<StatsKey, StatsValue>&) {
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if (key.uid == uid) {
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perUidEntryCount++;
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}
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totalEntryCount++;
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return base::Result<void>();
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};
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auto configuration = mConfigurationMap.readValue(CURRENT_STATS_MAP_CONFIGURATION_KEY);
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if (!configuration.ok()) {
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ALOGE("Failed to get current configuration: %s, fd: %d",
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strerror(configuration.error().code()), mConfigurationMap.getMap().get());
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return -configuration.error().code();
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}
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if (configuration.value() != SELECT_MAP_A && configuration.value() != SELECT_MAP_B) {
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ALOGE("unknown configuration value: %d", configuration.value());
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return -EINVAL;
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}
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BpfMap<StatsKey, StatsValue>& currentMap =
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(configuration.value() == SELECT_MAP_A) ? mStatsMapA : mStatsMapB;
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base::Result<void> res = currentMap.iterate(countUidStatsEntries);
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if (!res.ok()) {
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ALOGE("Failed to count the stats entry in map %d: %s", currentMap.getMap().get(),
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strerror(res.error().code()));
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return -res.error().code();
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}
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if (totalEntryCount > mTotalUidStatsEntriesLimit ||
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perUidEntryCount > mPerUidStatsEntriesLimit) {
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ALOGE("Too many stats entries in the map, total count: %u, uid(%u) count: %u, blocking tag"
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" request to prevent map overflow",
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totalEntryCount, uid, perUidEntryCount);
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return -EMFILE;
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}
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// Update the tag information of a socket to the cookieUidMap. Use BPF_ANY
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// flag so it will insert a new entry to the map if that value doesn't exist
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// yet. And update the tag if there is already a tag stored. Since the eBPF
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// program in kernel only read this map, and is protected by rcu read lock. It
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// should be fine to cocurrently update the map while eBPF program is running.
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res = mCookieTagMap.writeValue(sock_cookie, newKey, BPF_ANY);
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if (!res.ok()) {
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ALOGE("Failed to tag the socket: %s, fd: %d", strerror(res.error().code()),
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mCookieTagMap.getMap().get());
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return -res.error().code();
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}
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return 0;
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}
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int TrafficController::untagSocket(int sockFd) {
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std::lock_guard guard(mMutex);
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uint64_t sock_cookie = getSocketCookie(sockFd);
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if (sock_cookie == NONEXISTENT_COOKIE) return -errno;
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base::Result<void> res = mCookieTagMap.deleteValue(sock_cookie);
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if (!res.ok()) {
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ALOGE("Failed to untag socket: %s\n", strerror(res.error().code()));
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return -res.error().code();
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}
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return 0;
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}
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int TrafficController::setCounterSet(int counterSetNum, uid_t uid, uid_t callingUid) {
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if (counterSetNum < 0 || counterSetNum >= OVERFLOW_COUNTERSET) return -EINVAL;
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std::lock_guard guard(mMutex);
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if (!hasUpdateDeviceStatsPermission(callingUid)) return -EPERM;
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// The default counter set for all uid is 0, so deleting the current counterset for that uid
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// will automatically set it to 0.
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if (counterSetNum == 0) {
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Status res = mUidCounterSetMap.deleteValue(uid);
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if (isOk(res) || (!isOk(res) && res.code() == ENOENT)) {
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return 0;
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} else {
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ALOGE("Failed to delete the counterSet: %s\n", strerror(res.code()));
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return -res.code();
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}
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}
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uint8_t tmpCounterSetNum = (uint8_t)counterSetNum;
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Status res = mUidCounterSetMap.writeValue(uid, tmpCounterSetNum, BPF_ANY);
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if (!isOk(res)) {
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ALOGE("Failed to set the counterSet: %s, fd: %d", strerror(res.code()),
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mUidCounterSetMap.getMap().get());
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return -res.code();
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}
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return 0;
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}
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// This method only get called by system_server when an app get uinstalled, it
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// is called inside removeUidsLocked() while holding mStatsLock. So it is safe
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// to iterate and modify the stats maps.
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int TrafficController::deleteTagData(uint32_t tag, uid_t uid, uid_t callingUid) {
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std::lock_guard guard(mMutex);
|
|
if (!hasUpdateDeviceStatsPermission(callingUid)) return -EPERM;
|
|
|
|
// First we go through the cookieTagMap to delete the target uid tag combination. Or delete all
|
|
// the tags related to the uid if the tag is 0.
|
|
const auto deleteMatchedCookieEntries = [uid, tag](const uint64_t& key,
|
|
const UidTagValue& value,
|
|
BpfMap<uint64_t, UidTagValue>& map) {
|
|
if (value.uid == uid && (value.tag == tag || tag == 0)) {
|
|
auto res = map.deleteValue(key);
|
|
if (res.ok() || (res.error().code() == ENOENT)) {
|
|
return base::Result<void>();
|
|
}
|
|
ALOGE("Failed to delete data(cookie = %" PRIu64 "): %s\n", key,
|
|
strerror(res.error().code()));
|
|
}
|
|
// Move forward to next cookie in the map.
|
|
return base::Result<void>();
|
|
};
|
|
mCookieTagMap.iterateWithValue(deleteMatchedCookieEntries);
|
|
// Now we go through the Tag stats map and delete the data entry with correct uid and tag
|
|
// combination. Or all tag stats under that uid if the target tag is 0.
|
|
const auto deleteMatchedUidTagEntries = [uid, tag](const StatsKey& key,
|
|
BpfMap<StatsKey, StatsValue>& map) {
|
|
if (key.uid == uid && (key.tag == tag || tag == 0)) {
|
|
auto res = map.deleteValue(key);
|
|
if (res.ok() || (res.error().code() == ENOENT)) {
|
|
//Entry is deleted, use the current key to get a new nextKey;
|
|
return base::Result<void>();
|
|
}
|
|
ALOGE("Failed to delete data(uid=%u, tag=%u): %s\n", key.uid, key.tag,
|
|
strerror(res.error().code()));
|
|
}
|
|
return base::Result<void>();
|
|
};
|
|
mStatsMapB.iterate(deleteMatchedUidTagEntries);
|
|
mStatsMapA.iterate(deleteMatchedUidTagEntries);
|
|
// If the tag is not zero, we already deleted all the data entry required. If tag is 0, we also
|
|
// need to delete the stats stored in uidStatsMap and counterSet map.
|
|
if (tag != 0) return 0;
|
|
|
|
auto res = mUidCounterSetMap.deleteValue(uid);
|
|
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()));
|
|
}
|
|
|
|
auto deleteAppUidStatsEntry = [uid](const uint32_t& key,
|
|
BpfMap<uint32_t, StatsValue>& map) -> base::Result<void> {
|
|
if (key == uid) {
|
|
auto res = map.deleteValue(key);
|
|
if (res.ok() || (res.error().code() == ENOENT)) {
|
|
return {};
|
|
}
|
|
ALOGE("Failed to delete data(uid=%u): %s", key, strerror(res.error().code()));
|
|
}
|
|
return {};
|
|
};
|
|
mAppUidStatsMap.iterate(deleteAppUidStatsEntry);
|
|
return 0;
|
|
}
|
|
|
|
int TrafficController::addInterface(const char* name, uint32_t ifaceIndex) {
|
|
IfaceValue iface;
|
|
if (ifaceIndex == 0) {
|
|
ALOGE("Unknown interface %s(%d)", name, ifaceIndex);
|
|
return -1;
|
|
}
|
|
|
|
strlcpy(iface.name, name, sizeof(IfaceValue));
|
|
Status res = mIfaceIndexNameMap.writeValue(ifaceIndex, iface, BPF_ANY);
|
|
if (!isOk(res)) {
|
|
ALOGE("Failed to add iface %s(%d): %s", name, ifaceIndex, strerror(res.code()));
|
|
return -res.code();
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
Status TrafficController::updateOwnerMapEntry(UidOwnerMatchType match, uid_t uid, FirewallRule rule,
|
|
FirewallType type) {
|
|
std::lock_guard guard(mMutex);
|
|
if ((rule == ALLOW && type == ALLOWLIST) || (rule == DENY && type == DENYLIST)) {
|
|
RETURN_IF_NOT_OK(addRule(uid, match));
|
|
} else if ((rule == ALLOW && type == DENYLIST) || (rule == DENY && type == ALLOWLIST)) {
|
|
RETURN_IF_NOT_OK(removeRule(uid, match));
|
|
} else {
|
|
//Cannot happen.
|
|
return statusFromErrno(EINVAL, "");
|
|
}
|
|
return netdutils::status::ok;
|
|
}
|
|
|
|
Status TrafficController::removeRule(uint32_t uid, UidOwnerMatchType match) {
|
|
auto oldMatch = mUidOwnerMap.readValue(uid);
|
|
if (oldMatch.ok()) {
|
|
UidOwnerValue newMatch = {
|
|
.iif = (match == IIF_MATCH) ? 0 : oldMatch.value().iif,
|
|
.rule = static_cast<uint8_t>(oldMatch.value().rule & ~match),
|
|
};
|
|
if (newMatch.rule == 0) {
|
|
RETURN_IF_NOT_OK(mUidOwnerMap.deleteValue(uid));
|
|
} else {
|
|
RETURN_IF_NOT_OK(mUidOwnerMap.writeValue(uid, newMatch, BPF_ANY));
|
|
}
|
|
} else {
|
|
return statusFromErrno(ENOENT, StringPrintf("uid: %u does not exist in map", uid));
|
|
}
|
|
return netdutils::status::ok;
|
|
}
|
|
|
|
Status TrafficController::addRule(uint32_t uid, UidOwnerMatchType match, uint32_t iif) {
|
|
// iif should be non-zero if and only if match == MATCH_IIF
|
|
if (match == IIF_MATCH && iif == 0) {
|
|
return statusFromErrno(EINVAL, "Interface match must have nonzero interface index");
|
|
} else if (match != IIF_MATCH && iif != 0) {
|
|
return statusFromErrno(EINVAL, "Non-interface match must have zero interface index");
|
|
}
|
|
auto oldMatch = mUidOwnerMap.readValue(uid);
|
|
if (oldMatch.ok()) {
|
|
UidOwnerValue newMatch = {
|
|
.iif = iif ? iif : oldMatch.value().iif,
|
|
.rule = static_cast<uint8_t>(oldMatch.value().rule | match),
|
|
};
|
|
RETURN_IF_NOT_OK(mUidOwnerMap.writeValue(uid, newMatch, BPF_ANY));
|
|
} else {
|
|
UidOwnerValue newMatch = {
|
|
.iif = iif,
|
|
.rule = static_cast<uint8_t>(match),
|
|
};
|
|
RETURN_IF_NOT_OK(mUidOwnerMap.writeValue(uid, newMatch, BPF_ANY));
|
|
}
|
|
return netdutils::status::ok;
|
|
}
|
|
|
|
Status TrafficController::updateUidOwnerMap(const std::vector<uint32_t>& appUids,
|
|
UidOwnerMatchType matchType,
|
|
BandwidthController::IptOp op) {
|
|
std::lock_guard guard(mMutex);
|
|
for (uint32_t uid : appUids) {
|
|
if (op == BandwidthController::IptOpDelete) {
|
|
RETURN_IF_NOT_OK(removeRule(uid, matchType));
|
|
} else if (op == BandwidthController::IptOpInsert) {
|
|
RETURN_IF_NOT_OK(addRule(uid, matchType));
|
|
} else {
|
|
// Cannot happen.
|
|
return statusFromErrno(EINVAL, StringPrintf("invalid IptOp: %d, %d", op, matchType));
|
|
}
|
|
}
|
|
return netdutils::status::ok;
|
|
}
|
|
|
|
int TrafficController::changeUidOwnerRule(ChildChain chain, uid_t uid, FirewallRule rule,
|
|
FirewallType type) {
|
|
Status res;
|
|
switch (chain) {
|
|
case DOZABLE:
|
|
res = updateOwnerMapEntry(DOZABLE_MATCH, uid, rule, type);
|
|
break;
|
|
case STANDBY:
|
|
res = updateOwnerMapEntry(STANDBY_MATCH, uid, rule, type);
|
|
break;
|
|
case POWERSAVE:
|
|
res = updateOwnerMapEntry(POWERSAVE_MATCH, uid, rule, type);
|
|
break;
|
|
case RESTRICTED:
|
|
res = updateOwnerMapEntry(RESTRICTED_MATCH, uid, rule, type);
|
|
break;
|
|
case NONE:
|
|
default:
|
|
return -EINVAL;
|
|
}
|
|
if (!isOk(res)) {
|
|
ALOGE("change uid(%u) rule of %d failed: %s, rule: %d, type: %d", uid, chain,
|
|
res.msg().c_str(), rule, type);
|
|
return -res.code();
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
Status TrafficController::replaceRulesInMap(const UidOwnerMatchType match,
|
|
const std::vector<int32_t>& uids) {
|
|
std::lock_guard guard(mMutex);
|
|
std::set<int32_t> uidSet(uids.begin(), uids.end());
|
|
std::vector<uint32_t> uidsToDelete;
|
|
auto getUidsToDelete = [&uidsToDelete, &uidSet](const uint32_t& key,
|
|
const BpfMap<uint32_t, UidOwnerValue>&) {
|
|
if (uidSet.find((int32_t) key) == uidSet.end()) {
|
|
uidsToDelete.push_back(key);
|
|
}
|
|
return base::Result<void>();
|
|
};
|
|
RETURN_IF_NOT_OK(mUidOwnerMap.iterate(getUidsToDelete));
|
|
|
|
for(auto uid : uidsToDelete) {
|
|
RETURN_IF_NOT_OK(removeRule(uid, match));
|
|
}
|
|
|
|
for (auto uid : uids) {
|
|
RETURN_IF_NOT_OK(addRule(uid, match));
|
|
}
|
|
return netdutils::status::ok;
|
|
}
|
|
|
|
Status TrafficController::addUidInterfaceRules(const int iif,
|
|
const std::vector<int32_t>& uidsToAdd) {
|
|
if (!iif) {
|
|
return statusFromErrno(EINVAL, "Interface rule must specify interface");
|
|
}
|
|
std::lock_guard guard(mMutex);
|
|
|
|
for (auto uid : uidsToAdd) {
|
|
netdutils::Status result = addRule(uid, IIF_MATCH, iif);
|
|
if (!isOk(result)) {
|
|
ALOGW("addRule failed(%d): uid=%d iif=%d", result.code(), uid, iif);
|
|
}
|
|
}
|
|
return netdutils::status::ok;
|
|
}
|
|
|
|
Status TrafficController::removeUidInterfaceRules(const std::vector<int32_t>& uidsToDelete) {
|
|
std::lock_guard guard(mMutex);
|
|
|
|
for (auto uid : uidsToDelete) {
|
|
netdutils::Status result = removeRule(uid, IIF_MATCH);
|
|
if (!isOk(result)) {
|
|
ALOGW("removeRule failed(%d): uid=%d", result.code(), uid);
|
|
}
|
|
}
|
|
return netdutils::status::ok;
|
|
}
|
|
|
|
int TrafficController::replaceUidOwnerMap(const std::string& name, bool isAllowlist __unused,
|
|
const std::vector<int32_t>& uids) {
|
|
// FirewallRule rule = isAllowlist ? ALLOW : DENY;
|
|
// FirewallType type = isAllowlist ? ALLOWLIST : DENYLIST;
|
|
Status res;
|
|
if (!name.compare(FirewallController::LOCAL_DOZABLE)) {
|
|
res = replaceRulesInMap(DOZABLE_MATCH, uids);
|
|
} else if (!name.compare(FirewallController::LOCAL_STANDBY)) {
|
|
res = replaceRulesInMap(STANDBY_MATCH, uids);
|
|
} else if (!name.compare(FirewallController::LOCAL_POWERSAVE)) {
|
|
res = replaceRulesInMap(POWERSAVE_MATCH, uids);
|
|
} else if (!name.compare(FirewallController::LOCAL_RESTRICTED)) {
|
|
res = replaceRulesInMap(RESTRICTED_MATCH, uids);
|
|
} else {
|
|
ALOGE("unknown chain name: %s", name.c_str());
|
|
return -EINVAL;
|
|
}
|
|
if (!isOk(res)) {
|
|
ALOGE("Failed to clean up chain: %s: %s", name.c_str(), res.msg().c_str());
|
|
return -res.code();
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
int TrafficController::toggleUidOwnerMap(ChildChain chain, bool enable) {
|
|
std::lock_guard guard(mMutex);
|
|
uint32_t key = UID_RULES_CONFIGURATION_KEY;
|
|
auto oldConfiguration = mConfigurationMap.readValue(key);
|
|
if (!oldConfiguration.ok()) {
|
|
ALOGE("Cannot read the old configuration from map: %s",
|
|
oldConfiguration.error().message().c_str());
|
|
return -oldConfiguration.error().code();
|
|
}
|
|
Status res;
|
|
BpfConfig newConfiguration;
|
|
uint8_t match;
|
|
switch (chain) {
|
|
case DOZABLE:
|
|
match = DOZABLE_MATCH;
|
|
break;
|
|
case STANDBY:
|
|
match = STANDBY_MATCH;
|
|
break;
|
|
case POWERSAVE:
|
|
match = POWERSAVE_MATCH;
|
|
break;
|
|
case RESTRICTED:
|
|
match = RESTRICTED_MATCH;
|
|
break;
|
|
default:
|
|
return -EINVAL;
|
|
}
|
|
newConfiguration =
|
|
enable ? (oldConfiguration.value() | match) : (oldConfiguration.value() & (~match));
|
|
res = mConfigurationMap.writeValue(key, newConfiguration, BPF_EXIST);
|
|
if (!isOk(res)) {
|
|
ALOGE("Failed to toggleUidOwnerMap(%d): %s", chain, res.msg().c_str());
|
|
}
|
|
return -res.code();
|
|
}
|
|
|
|
Status TrafficController::swapActiveStatsMap() {
|
|
std::lock_guard guard(mMutex);
|
|
|
|
uint32_t key = CURRENT_STATS_MAP_CONFIGURATION_KEY;
|
|
auto oldConfiguration = mConfigurationMap.readValue(key);
|
|
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());
|
|
}
|
|
|
|
// Write to the configuration map to inform the kernel eBPF program to switch
|
|
// from using one map to the other. Use flag BPF_EXIST here since the map should
|
|
// be already populated in initMaps.
|
|
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.ok()) {
|
|
ALOGE("Failed to toggle the stats map: %s", strerror(res.error().code()));
|
|
return res;
|
|
}
|
|
// After changing the config, we need to make sure all the current running
|
|
// eBPF programs are finished and all the CPUs are aware of this config change
|
|
// before we modify the old map. So we do a special hack here to wait for
|
|
// the kernel to do a synchronize_rcu(). Once the kernel called
|
|
// synchronize_rcu(), the config we just updated will be available to all cores
|
|
// and the next eBPF programs triggered inside the kernel will use the new
|
|
// map configuration. So once this function returns we can safely modify the
|
|
// old stats map without concerning about race between the kernel and
|
|
// userspace.
|
|
int ret = synchronizeKernelRCU();
|
|
if (ret) {
|
|
ALOGE("map swap synchronize_rcu() ended with failure: %s", strerror(-ret));
|
|
return statusFromErrno(-ret, "map swap synchronize_rcu() failed");
|
|
}
|
|
return netdutils::status::ok;
|
|
}
|
|
|
|
void TrafficController::setPermissionForUids(int permission, const std::vector<uid_t>& uids) {
|
|
std::lock_guard guard(mMutex);
|
|
if (permission == INetd::PERMISSION_UNINSTALLED) {
|
|
for (uid_t uid : uids) {
|
|
// Clean up all permission information for the related uid if all the
|
|
// packages related to it are uninstalled.
|
|
mPrivilegedUser.erase(uid);
|
|
Status ret = mUidPermissionMap.deleteValue(uid);
|
|
if (!isOk(ret) && ret.code() != ENOENT) {
|
|
ALOGE("Failed to clean up the permission for %u: %s", uid, strerror(ret.code()));
|
|
}
|
|
}
|
|
return;
|
|
}
|
|
|
|
bool privileged = (permission & INetd::PERMISSION_UPDATE_DEVICE_STATS);
|
|
|
|
for (uid_t uid : uids) {
|
|
if (privileged) {
|
|
mPrivilegedUser.insert(uid);
|
|
} else {
|
|
mPrivilegedUser.erase(uid);
|
|
}
|
|
|
|
// The map stores all the permissions that the UID has, except if the only permission
|
|
// the UID has is the INTERNET permission, then the UID should not appear in the map.
|
|
if (permission != INetd::PERMISSION_INTERNET) {
|
|
Status ret = mUidPermissionMap.writeValue(uid, permission, BPF_ANY);
|
|
if (!isOk(ret)) {
|
|
ALOGE("Failed to set permission: %s of uid(%u) to permission map: %s",
|
|
UidPermissionTypeToString(permission).c_str(), uid, strerror(ret.code()));
|
|
}
|
|
} else {
|
|
Status ret = mUidPermissionMap.deleteValue(uid);
|
|
if (!isOk(ret) && ret.code() != ENOENT) {
|
|
ALOGE("Failed to remove uid %u from permission map: %s", uid, strerror(ret.code()));
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
std::string getProgramStatus(const char *path) {
|
|
int ret = access(path, R_OK);
|
|
if (ret == 0) {
|
|
return StringPrintf("OK");
|
|
}
|
|
if (ret != 0 && errno == ENOENT) {
|
|
return StringPrintf("program is missing at: %s", path);
|
|
}
|
|
return StringPrintf("check Program %s error: %s", path, strerror(errno));
|
|
}
|
|
|
|
std::string getMapStatus(const base::unique_fd& map_fd, const char* path) {
|
|
if (map_fd.get() < 0) {
|
|
return StringPrintf("map fd lost");
|
|
}
|
|
if (access(path, F_OK) != 0) {
|
|
return StringPrintf("map not pinned to location: %s", path);
|
|
}
|
|
return StringPrintf("OK");
|
|
}
|
|
|
|
// NOLINTNEXTLINE(google-runtime-references): grandfathered pass by non-const reference
|
|
void dumpBpfMap(const std::string& mapName, DumpWriter& dw, const std::string& header) {
|
|
dw.blankline();
|
|
dw.println("%s:", mapName.c_str());
|
|
if (!header.empty()) {
|
|
dw.println(header);
|
|
}
|
|
}
|
|
|
|
const String16 TrafficController::DUMP_KEYWORD = String16("trafficcontroller");
|
|
|
|
void TrafficController::dump(DumpWriter& dw, bool verbose) {
|
|
std::lock_guard guard(mMutex);
|
|
ScopedIndent indentTop(dw);
|
|
dw.println("TrafficController");
|
|
|
|
ScopedIndent indentPreBpfModule(dw);
|
|
|
|
dw.blankline();
|
|
dw.println("mCookieTagMap status: %s",
|
|
getMapStatus(mCookieTagMap.getMap(), COOKIE_TAG_MAP_PATH).c_str());
|
|
dw.println("mUidCounterSetMap status: %s",
|
|
getMapStatus(mUidCounterSetMap.getMap(), UID_COUNTERSET_MAP_PATH).c_str());
|
|
dw.println("mAppUidStatsMap status: %s",
|
|
getMapStatus(mAppUidStatsMap.getMap(), APP_UID_STATS_MAP_PATH).c_str());
|
|
dw.println("mStatsMapA status: %s",
|
|
getMapStatus(mStatsMapA.getMap(), STATS_MAP_A_PATH).c_str());
|
|
dw.println("mStatsMapB status: %s",
|
|
getMapStatus(mStatsMapB.getMap(), STATS_MAP_B_PATH).c_str());
|
|
dw.println("mIfaceIndexNameMap status: %s",
|
|
getMapStatus(mIfaceIndexNameMap.getMap(), IFACE_INDEX_NAME_MAP_PATH).c_str());
|
|
dw.println("mIfaceStatsMap status: %s",
|
|
getMapStatus(mIfaceStatsMap.getMap(), IFACE_STATS_MAP_PATH).c_str());
|
|
dw.println("mConfigurationMap status: %s",
|
|
getMapStatus(mConfigurationMap.getMap(), CONFIGURATION_MAP_PATH).c_str());
|
|
dw.println("mUidOwnerMap status: %s",
|
|
getMapStatus(mUidOwnerMap.getMap(), UID_OWNER_MAP_PATH).c_str());
|
|
|
|
dw.blankline();
|
|
dw.println("Cgroup ingress program status: %s",
|
|
getProgramStatus(BPF_INGRESS_PROG_PATH).c_str());
|
|
dw.println("Cgroup egress program status: %s", getProgramStatus(BPF_EGRESS_PROG_PATH).c_str());
|
|
dw.println("xt_bpf ingress program status: %s",
|
|
getProgramStatus(XT_BPF_INGRESS_PROG_PATH).c_str());
|
|
dw.println("xt_bpf egress program status: %s",
|
|
getProgramStatus(XT_BPF_EGRESS_PROG_PATH).c_str());
|
|
dw.println("xt_bpf bandwidth allowlist program status: %s",
|
|
getProgramStatus(XT_BPF_ALLOWLIST_PROG_PATH).c_str());
|
|
dw.println("xt_bpf bandwidth denylist program status: %s",
|
|
getProgramStatus(XT_BPF_DENYLIST_PROG_PATH).c_str());
|
|
|
|
if (!verbose) {
|
|
return;
|
|
}
|
|
|
|
dw.blankline();
|
|
dw.println("BPF map content:");
|
|
|
|
ScopedIndent indentForMapContent(dw);
|
|
|
|
// Print CookieTagMap content.
|
|
dumpBpfMap("mCookieTagMap", dw, "");
|
|
const auto printCookieTagInfo = [&dw](const uint64_t& key, const UidTagValue& value,
|
|
const BpfMap<uint64_t, UidTagValue>&) {
|
|
dw.println("cookie=%" PRIu64 " tag=0x%x uid=%u", key, value.tag, value.uid);
|
|
return base::Result<void>();
|
|
};
|
|
base::Result<void> res = mCookieTagMap.iterateWithValue(printCookieTagInfo);
|
|
if (!res.ok()) {
|
|
dw.println("mCookieTagMap print end with error: %s", res.error().message().c_str());
|
|
}
|
|
|
|
// Print UidCounterSetMap Content
|
|
dumpBpfMap("mUidCounterSetMap", dw, "");
|
|
const auto printUidInfo = [&dw](const uint32_t& key, const uint8_t& value,
|
|
const BpfMap<uint32_t, uint8_t>&) {
|
|
dw.println("%u %u", key, value);
|
|
return base::Result<void>();
|
|
};
|
|
res = mUidCounterSetMap.iterateWithValue(printUidInfo);
|
|
if (!res.ok()) {
|
|
dw.println("mUidCounterSetMap print end with error: %s", res.error().message().c_str());
|
|
}
|
|
|
|
// Print AppUidStatsMap content
|
|
std::string appUidStatsHeader = StringPrintf("uid rxBytes rxPackets txBytes txPackets");
|
|
dumpBpfMap("mAppUidStatsMap:", dw, appUidStatsHeader);
|
|
auto printAppUidStatsInfo = [&dw](const uint32_t& key, const StatsValue& value,
|
|
const BpfMap<uint32_t, StatsValue>&) {
|
|
dw.println("%u %" PRIu64 " %" PRIu64 " %" PRIu64 " %" PRIu64, key, value.rxBytes,
|
|
value.rxPackets, value.txBytes, value.txPackets);
|
|
return base::Result<void>();
|
|
};
|
|
res = mAppUidStatsMap.iterateWithValue(printAppUidStatsInfo);
|
|
if (!res.ok()) {
|
|
dw.println("mAppUidStatsMap print end with error: %s", res.error().message().c_str());
|
|
}
|
|
|
|
// Print uidStatsMap content
|
|
std::string statsHeader = StringPrintf("ifaceIndex ifaceName tag_hex uid_int cnt_set rxBytes"
|
|
" rxPackets txBytes txPackets");
|
|
dumpBpfMap("mStatsMapA", dw, statsHeader);
|
|
const auto printStatsInfo = [&dw, this](const StatsKey& key, const StatsValue& value,
|
|
const BpfMap<StatsKey, StatsValue>&) {
|
|
uint32_t ifIndex = key.ifaceIndex;
|
|
auto ifname = mIfaceIndexNameMap.readValue(ifIndex);
|
|
if (!ifname.ok()) {
|
|
ifname = IfaceValue{"unknown"};
|
|
}
|
|
dw.println("%u %s 0x%x %u %u %" PRIu64 " %" PRIu64 " %" PRIu64 " %" PRIu64, ifIndex,
|
|
ifname.value().name, key.tag, key.uid, key.counterSet, value.rxBytes,
|
|
value.rxPackets, value.txBytes, value.txPackets);
|
|
return base::Result<void>();
|
|
};
|
|
res = mStatsMapA.iterateWithValue(printStatsInfo);
|
|
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.ok()) {
|
|
dw.println("mStatsMapB print end with error: %s", res.error().message().c_str());
|
|
}
|
|
|
|
// Print ifaceIndexToNameMap content.
|
|
dumpBpfMap("mIfaceIndexNameMap", dw, "");
|
|
const auto printIfaceNameInfo = [&dw](const uint32_t& key, const IfaceValue& value,
|
|
const BpfMap<uint32_t, IfaceValue>&) {
|
|
const char* ifname = value.name;
|
|
dw.println("ifaceIndex=%u ifaceName=%s", key, ifname);
|
|
return base::Result<void>();
|
|
};
|
|
res = mIfaceIndexNameMap.iterateWithValue(printIfaceNameInfo);
|
|
if (!res.ok()) {
|
|
dw.println("mIfaceIndexNameMap print end with error: %s", res.error().message().c_str());
|
|
}
|
|
|
|
// Print ifaceStatsMap content
|
|
std::string ifaceStatsHeader = StringPrintf("ifaceIndex ifaceName rxBytes rxPackets txBytes"
|
|
" txPackets");
|
|
dumpBpfMap("mIfaceStatsMap:", dw, ifaceStatsHeader);
|
|
const auto printIfaceStatsInfo = [&dw, this](const uint32_t& key, const StatsValue& value,
|
|
const BpfMap<uint32_t, StatsValue>&) {
|
|
auto ifname = mIfaceIndexNameMap.readValue(key);
|
|
if (!ifname.ok()) {
|
|
ifname = IfaceValue{"unknown"};
|
|
}
|
|
dw.println("%u %s %" PRIu64 " %" PRIu64 " %" PRIu64 " %" PRIu64, key, ifname.value().name,
|
|
value.rxBytes, value.rxPackets, value.txBytes, value.txPackets);
|
|
return base::Result<void>();
|
|
};
|
|
res = mIfaceStatsMap.iterateWithValue(printIfaceStatsInfo);
|
|
if (!res.ok()) {
|
|
dw.println("mIfaceStatsMap print end with error: %s", res.error().message().c_str());
|
|
}
|
|
|
|
dw.blankline();
|
|
|
|
uint32_t key = UID_RULES_CONFIGURATION_KEY;
|
|
auto configuration = mConfigurationMap.readValue(key);
|
|
if (configuration.ok()) {
|
|
dw.println("current ownerMatch configuration: %d%s", configuration.value(),
|
|
uidMatchTypeToString(configuration.value()).c_str());
|
|
} else {
|
|
dw.println("mConfigurationMap read ownerMatch configure failed with error: %s",
|
|
configuration.error().message().c_str());
|
|
}
|
|
|
|
key = CURRENT_STATS_MAP_CONFIGURATION_KEY;
|
|
configuration = mConfigurationMap.readValue(key);
|
|
if (configuration.ok()) {
|
|
const char* statsMapDescription = "???";
|
|
switch (configuration.value()) {
|
|
case SELECT_MAP_A:
|
|
statsMapDescription = "SELECT_MAP_A";
|
|
break;
|
|
case SELECT_MAP_B:
|
|
statsMapDescription = "SELECT_MAP_B";
|
|
break;
|
|
// No default clause, so if we ever add a third map, this code will fail to build.
|
|
}
|
|
dw.println("current statsMap configuration: %d %s", configuration.value(),
|
|
statsMapDescription);
|
|
} else {
|
|
dw.println("mConfigurationMap read stats map configure failed with error: %s",
|
|
configuration.error().message().c_str());
|
|
}
|
|
dumpBpfMap("mUidOwnerMap", dw, "");
|
|
const auto printUidMatchInfo = [&dw, this](const uint32_t& key, const UidOwnerValue& value,
|
|
const BpfMap<uint32_t, UidOwnerValue>&) {
|
|
if (value.rule & IIF_MATCH) {
|
|
auto ifname = mIfaceIndexNameMap.readValue(value.iif);
|
|
if (ifname.ok()) {
|
|
dw.println("%u %s %s", key, uidMatchTypeToString(value.rule).c_str(),
|
|
ifname.value().name);
|
|
} else {
|
|
dw.println("%u %s %u", key, uidMatchTypeToString(value.rule).c_str(), value.iif);
|
|
}
|
|
} else {
|
|
dw.println("%u %s", key, uidMatchTypeToString(value.rule).c_str());
|
|
}
|
|
return base::Result<void>();
|
|
};
|
|
res = mUidOwnerMap.iterateWithValue(printUidMatchInfo);
|
|
if (!res.ok()) {
|
|
dw.println("mUidOwnerMap print end with error: %s", res.error().message().c_str());
|
|
}
|
|
dumpBpfMap("mUidPermissionMap", dw, "");
|
|
const auto printUidPermissionInfo = [&dw](const uint32_t& key, const int& value,
|
|
const BpfMap<uint32_t, uint8_t>&) {
|
|
dw.println("%u %s", key, UidPermissionTypeToString(value).c_str());
|
|
return base::Result<void>();
|
|
};
|
|
res = mUidPermissionMap.iterateWithValue(printUidPermissionInfo);
|
|
if (!res.ok()) {
|
|
dw.println("mUidPermissionMap print end with error: %s", res.error().message().c_str());
|
|
}
|
|
|
|
dumpBpfMap("mPrivilegedUser", dw, "");
|
|
for (uid_t uid : mPrivilegedUser) {
|
|
dw.println("%u ALLOW_UPDATE_DEVICE_STATS", (uint32_t)uid);
|
|
}
|
|
}
|
|
|
|
} // namespace net
|
|
} // namespace android
|