InstalldNativeService.cpp revision 451c17d82077cca61d0d04097961e99d84f54146 
1/*
2** Copyright 2008, The Android Open Source Project
3**
4** Licensed under the Apache License, Version 2.0 (the "License");
5** you may not use this file except in compliance with the License.
6** You may obtain a copy of the License at
7**
8**     http://www.apache.org/licenses/LICENSE-2.0
9**
10** Unless required by applicable law or agreed to in writing, software
11** distributed under the License is distributed on an "AS IS" BASIS,
12** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13** See the License for the specific language governing permissions and
14** limitations under the License.
15*/
16
17#include "InstalldNativeService.h"
18
19#include <errno.h>
20#include <inttypes.h>
21#include <regex>
22#include <stdlib.h>
23#include <sys/capability.h>
24#include <sys/file.h>
25#include <sys/resource.h>
26#include <sys/stat.h>
27#include <sys/types.h>
28#include <sys/wait.h>
29#include <sys/xattr.h>
30#include <unistd.h>
31
32#include <android-base/logging.h>
33#include <android-base/stringprintf.h>
34#include <android-base/strings.h>
35#include <android-base/unique_fd.h>
36#include <cutils/fs.h>
37#include <cutils/log.h>               // TODO: Move everything to base/logging.
38#include <cutils/properties.h>
39#include <cutils/sched_policy.h>
40#include <diskusage/dirsize.h>
41#include <logwrap/logwrap.h>
42#include <private/android_filesystem_config.h>
43#include <selinux/android.h>
44#include <system/thread_defs.h>
45
46#include "dexopt.h"
47#include "globals.h"
48#include "installd_deps.h"
49#include "otapreopt_utils.h"
50#include "utils.h"
51
52#ifndef LOG_TAG
53#define LOG_TAG "installd"
54#endif
55
56using android::base::StringPrintf;
57
58namespace android {
59namespace installd {
60
61static constexpr const char* kCpPath = "/system/bin/cp";
62static constexpr const char* kXattrDefault = "user.default";
63
64static constexpr const int MIN_RESTRICTED_HOME_SDK_VERSION = 24; // > M
65
66static constexpr const char* PKG_LIB_POSTFIX = "/lib";
67static constexpr const char* CACHE_DIR_POSTFIX = "/cache";
68static constexpr const char* CODE_CACHE_DIR_POSTFIX = "/code_cache";
69
70static constexpr const char* IDMAP_PREFIX = "/data/resource-cache/";
71static constexpr const char* IDMAP_SUFFIX = "@idmap";
72
73// NOTE: keep in sync with StorageManager
74static constexpr int FLAG_STORAGE_DE = 1 << 0;
75static constexpr int FLAG_STORAGE_CE = 1 << 1;
76
77// NOTE: keep in sync with Installer
78static constexpr int FLAG_CLEAR_CACHE_ONLY = 1 << 8;
79static constexpr int FLAG_CLEAR_CODE_CACHE_ONLY = 1 << 9;
80
81
82namespace {
83
84constexpr const char* kDump = "android.permission.DUMP";
85
86static binder::Status ok() {
87    return binder::Status::ok();
88}
89
90static binder::Status exception(uint32_t code) {
91    return binder::Status::fromExceptionCode(code);
92}
93
94static binder::Status exception(uint32_t code, const std::string& msg) {
95    return binder::Status::fromExceptionCode(code, String8(msg.c_str()));
96}
97
98static binder::Status error() {
99    return binder::Status::fromServiceSpecificError(errno);
100}
101
102static binder::Status error(const std::string& msg) {
103    PLOG(ERROR) << msg;
104    return binder::Status::fromServiceSpecificError(errno, String8(msg.c_str()));
105}
106
107static binder::Status error(uint32_t code, const std::string& msg) {
108    LOG(ERROR) << msg << " (" << code << ")";
109    return binder::Status::fromServiceSpecificError(code, String8(msg.c_str()));
110}
111
112binder::Status checkPermission(const char* permission) {
113    pid_t pid;
114    uid_t uid;
115
116    if (checkCallingPermission(String16(permission), reinterpret_cast<int32_t*>(&pid),
117            reinterpret_cast<int32_t*>(&uid))) {
118        return ok();
119    } else {
120        return exception(binder::Status::EX_SECURITY,
121                StringPrintf("UID %d / PID %d lacks permission %s", uid, pid, permission));
122    }
123}
124
125binder::Status checkUid(uid_t expectedUid) {
126    uid_t uid = IPCThreadState::self()->getCallingUid();
127    if (uid == expectedUid || uid == AID_ROOT) {
128        return ok();
129    } else {
130        return exception(binder::Status::EX_SECURITY,
131                StringPrintf("UID %d is not expected UID %d", uid, expectedUid));
132    }
133}
134
135binder::Status checkArgumentUuid(const std::unique_ptr<std::string>& uuid) {
136    if (!uuid || is_valid_filename(*uuid)) {
137        return ok();
138    } else {
139        return exception(binder::Status::EX_ILLEGAL_ARGUMENT,
140                StringPrintf("UUID %s is malformed", uuid->c_str()));
141    }
142}
143
144binder::Status checkArgumentPackageName(const std::string& packageName) {
145    if (is_valid_package_name(packageName.c_str())) {
146        return ok();
147    } else {
148        return exception(binder::Status::EX_ILLEGAL_ARGUMENT,
149                StringPrintf("Package name %s is malformed", packageName.c_str()));
150    }
151}
152
153#define ENFORCE_UID(uid) {                                  \
154    binder::Status status = checkUid((uid));                \
155    if (!status.isOk()) {                                   \
156        return status;                                      \
157    }                                                       \
158}
159
160#define CHECK_ARGUMENT_UUID(uuid) {                         \
161    binder::Status status = checkArgumentUuid((uuid));      \
162    if (!status.isOk()) {                                   \
163        return status;                                      \
164    }                                                       \
165}
166
167#define CHECK_ARGUMENT_PACKAGE_NAME(packageName) {          \
168    binder::Status status =                                 \
169            checkArgumentPackageName((packageName));        \
170    if (!status.isOk()) {                                   \
171        return status;                                      \
172    }                                                       \
173}
174
175}  // namespace
176
177status_t InstalldNativeService::start() {
178    IPCThreadState::self()->disableBackgroundScheduling(true);
179    status_t ret = BinderService<InstalldNativeService>::publish();
180    if (ret != android::OK) {
181        return ret;
182    }
183    sp<ProcessState> ps(ProcessState::self());
184    ps->startThreadPool();
185    ps->giveThreadPoolName();
186    return android::OK;
187}
188
189status_t InstalldNativeService::dump(int fd, const Vector<String16> & /* args */) {
190    const binder::Status dump_permission = checkPermission(kDump);
191    if (!dump_permission.isOk()) {
192        const String8 msg(dump_permission.toString8());
193        write(fd, msg.string(), msg.size());
194        return PERMISSION_DENIED;
195    }
196
197    std::string msg = "installd is happy\n";
198    write(fd, msg.c_str(), strlen(msg.c_str()));
199    return NO_ERROR;
200}
201
202/**
203 * Perform restorecon of the given path, but only perform recursive restorecon
204 * if the label of that top-level file actually changed.  This can save us
205 * significant time by avoiding no-op traversals of large filesystem trees.
206 */
207static int restorecon_app_data_lazy(const std::string& path, const std::string& seInfo, uid_t uid) {
208    int res = 0;
209    char* before = nullptr;
210    char* after = nullptr;
211
212    // Note that SELINUX_ANDROID_RESTORECON_DATADATA flag is set by
213    // libselinux. Not needed here.
214
215    if (lgetfilecon(path.c_str(), &before) < 0) {
216        PLOG(ERROR) << "Failed before getfilecon for " << path;
217        goto fail;
218    }
219    if (selinux_android_restorecon_pkgdir(path.c_str(), seInfo.c_str(), uid, 0) < 0) {
220        PLOG(ERROR) << "Failed top-level restorecon for " << path;
221        goto fail;
222    }
223    if (lgetfilecon(path.c_str(), &after) < 0) {
224        PLOG(ERROR) << "Failed after getfilecon for " << path;
225        goto fail;
226    }
227
228    // If the initial top-level restorecon above changed the label, then go
229    // back and restorecon everything recursively
230    if (strcmp(before, after)) {
231        LOG(DEBUG) << "Detected label change from " << before << " to " << after << " at " << path
232                << "; running recursive restorecon";
233        if (selinux_android_restorecon_pkgdir(path.c_str(), seInfo.c_str(), uid,
234                SELINUX_ANDROID_RESTORECON_RECURSE) < 0) {
235            PLOG(ERROR) << "Failed recursive restorecon for " << path;
236            goto fail;
237        }
238    }
239
240    goto done;
241fail:
242    res = -1;
243done:
244    free(before);
245    free(after);
246    return res;
247}
248
249static int restorecon_app_data_lazy(const std::string& parent, const char* name,
250        const std::string& seInfo, uid_t uid) {
251    return restorecon_app_data_lazy(StringPrintf("%s/%s", parent.c_str(), name), seInfo, uid);
252}
253
254static int prepare_app_dir(const std::string& path, mode_t target_mode, uid_t uid) {
255    if (fs_prepare_dir_strict(path.c_str(), target_mode, uid, uid) != 0) {
256        PLOG(ERROR) << "Failed to prepare " << path;
257        return -1;
258    }
259    return 0;
260}
261
262static int prepare_app_dir(const std::string& parent, const char* name, mode_t target_mode,
263        uid_t uid) {
264    return prepare_app_dir(StringPrintf("%s/%s", parent.c_str(), name), target_mode, uid);
265}
266
267binder::Status InstalldNativeService::createAppData(const std::unique_ptr<std::string>& uuid,
268        const std::string& packageName, int32_t userId, int32_t flags, int32_t appId,
269        const std::string& seInfo, int32_t targetSdkVersion) {
270    ENFORCE_UID(AID_SYSTEM);
271    CHECK_ARGUMENT_UUID(uuid);
272    CHECK_ARGUMENT_PACKAGE_NAME(packageName);
273
274    const char* uuid_ = uuid ? uuid->c_str() : nullptr;
275    const char* pkgname = packageName.c_str();
276
277    uid_t uid = multiuser_get_uid(userId, appId);
278    mode_t target_mode = targetSdkVersion >= MIN_RESTRICTED_HOME_SDK_VERSION ? 0700 : 0751;
279    if (flags & FLAG_STORAGE_CE) {
280        auto path = create_data_user_ce_package_path(uuid_, userId, pkgname);
281        if (prepare_app_dir(path, target_mode, uid) ||
282                prepare_app_dir(path, "cache", 0771, uid) ||
283                prepare_app_dir(path, "code_cache", 0771, uid)) {
284            return error("Failed to prepare " + path);
285        }
286
287        // Consider restorecon over contents if label changed
288        if (restorecon_app_data_lazy(path, seInfo, uid) ||
289                restorecon_app_data_lazy(path, "cache", seInfo, uid) ||
290                restorecon_app_data_lazy(path, "code_cache", seInfo, uid)) {
291            return error("Failed to restorecon " + path);
292        }
293
294        // Remember inode numbers of cache directories so that we can clear
295        // contents while CE storage is locked
296        if (write_path_inode(path, "cache", kXattrInodeCache) ||
297                write_path_inode(path, "code_cache", kXattrInodeCodeCache)) {
298            return error("Failed to write_path_inode for " + path);
299        }
300    }
301    if (flags & FLAG_STORAGE_DE) {
302        auto path = create_data_user_de_package_path(uuid_, userId, pkgname);
303        if (prepare_app_dir(path, target_mode, uid)) {
304            return error("Failed to prepare " + path);
305        }
306
307        // Consider restorecon over contents if label changed
308        if (restorecon_app_data_lazy(path, seInfo, uid)) {
309            return error("Failed to restorecon " + path);
310        }
311
312        if (property_get_bool("dalvik.vm.usejitprofiles", false)) {
313            const std::string profile_path = create_data_user_profile_package_path(userId, pkgname);
314            // read-write-execute only for the app user.
315            if (fs_prepare_dir_strict(profile_path.c_str(), 0700, uid, uid) != 0) {
316                return error("Failed to prepare " + profile_path);
317            }
318            std::string profile_file = create_primary_profile(profile_path);
319            // read-write only for the app user.
320            if (fs_prepare_file_strict(profile_file.c_str(), 0600, uid, uid) != 0) {
321                return error("Failed to prepare " + profile_path);
322            }
323            const std::string ref_profile_path = create_data_ref_profile_package_path(pkgname);
324            // dex2oat/profman runs under the shared app gid and it needs to read/write reference
325            // profiles.
326            int shared_app_gid = multiuser_get_shared_app_gid(uid);
327            if ((shared_app_gid != -1) && fs_prepare_dir_strict(
328                    ref_profile_path.c_str(), 0700, shared_app_gid, shared_app_gid) != 0) {
329                return error("Failed to prepare " + ref_profile_path);
330            }
331        }
332    }
333    return ok();
334}
335
336binder::Status InstalldNativeService::migrateAppData(const std::unique_ptr<std::string>& uuid,
337        const std::string& packageName, int32_t userId, int32_t flags) {
338    ENFORCE_UID(AID_SYSTEM);
339    CHECK_ARGUMENT_UUID(uuid);
340    CHECK_ARGUMENT_PACKAGE_NAME(packageName);
341
342    const char* uuid_ = uuid ? uuid->c_str() : nullptr;
343    const char* pkgname = packageName.c_str();
344
345    // This method only exists to upgrade system apps that have requested
346    // forceDeviceEncrypted, so their default storage always lives in a
347    // consistent location.  This only works on non-FBE devices, since we
348    // never want to risk exposing data on a device with real CE/DE storage.
349
350    auto ce_path = create_data_user_ce_package_path(uuid_, userId, pkgname);
351    auto de_path = create_data_user_de_package_path(uuid_, userId, pkgname);
352
353    // If neither directory is marked as default, assume CE is default
354    if (getxattr(ce_path.c_str(), kXattrDefault, nullptr, 0) == -1
355            && getxattr(de_path.c_str(), kXattrDefault, nullptr, 0) == -1) {
356        if (setxattr(ce_path.c_str(), kXattrDefault, nullptr, 0, 0) != 0) {
357            return error("Failed to mark default storage " + ce_path);
358        }
359    }
360
361    // Migrate default data location if needed
362    auto target = (flags & FLAG_STORAGE_DE) ? de_path : ce_path;
363    auto source = (flags & FLAG_STORAGE_DE) ? ce_path : de_path;
364
365    if (getxattr(target.c_str(), kXattrDefault, nullptr, 0) == -1) {
366        LOG(WARNING) << "Requested default storage " << target
367                << " is not active; migrating from " << source;
368        if (delete_dir_contents_and_dir(target) != 0) {
369            return error("Failed to delete " + target);
370        }
371        if (rename(source.c_str(), target.c_str()) != 0) {
372            return error("Failed to rename " + source + " to " + target);
373        }
374    }
375
376    return ok();
377}
378
379
380binder::Status InstalldNativeService::clearAppProfiles(const std::string& packageName) {
381    ENFORCE_UID(AID_SYSTEM);
382    CHECK_ARGUMENT_PACKAGE_NAME(packageName);
383
384    const char* pkgname = packageName.c_str();
385    binder::Status res = ok();
386    if (!clear_reference_profile(pkgname)) {
387        res = error("Failed to clear reference profile for " + packageName);
388    }
389    if (!clear_current_profiles(pkgname)) {
390        res = error("Failed to clear current profiles for " + packageName);
391    }
392    return res;
393}
394
395binder::Status InstalldNativeService::clearAppData(const std::unique_ptr<std::string>& uuid,
396        const std::string& packageName, int32_t userId, int32_t flags, int64_t ceDataInode) {
397    ENFORCE_UID(AID_SYSTEM);
398    CHECK_ARGUMENT_UUID(uuid);
399    CHECK_ARGUMENT_PACKAGE_NAME(packageName);
400
401    const char* uuid_ = uuid ? uuid->c_str() : nullptr;
402    const char* pkgname = packageName.c_str();
403
404    binder::Status res = ok();
405    if (flags & FLAG_STORAGE_CE) {
406        auto path = create_data_user_ce_package_path(uuid_, userId, pkgname, ceDataInode);
407        if (flags & FLAG_CLEAR_CACHE_ONLY) {
408            path = read_path_inode(path, "cache", kXattrInodeCache);
409        } else if (flags & FLAG_CLEAR_CODE_CACHE_ONLY) {
410            path = read_path_inode(path, "code_cache", kXattrInodeCodeCache);
411        }
412        if (access(path.c_str(), F_OK) == 0) {
413            if (delete_dir_contents(path) != 0) {
414                res = error("Failed to delete contents of " + path);
415            }
416        }
417    }
418    if (flags & FLAG_STORAGE_DE) {
419        std::string suffix = "";
420        bool only_cache = false;
421        if (flags & FLAG_CLEAR_CACHE_ONLY) {
422            suffix = CACHE_DIR_POSTFIX;
423            only_cache = true;
424        } else if (flags & FLAG_CLEAR_CODE_CACHE_ONLY) {
425            suffix = CODE_CACHE_DIR_POSTFIX;
426            only_cache = true;
427        }
428
429        auto path = create_data_user_de_package_path(uuid_, userId, pkgname) + suffix;
430        if (access(path.c_str(), F_OK) == 0) {
431            if (delete_dir_contents(path) != 0) {
432                res = error("Failed to delete contents of " + path);
433            }
434        }
435        if (!only_cache) {
436            if (!clear_current_profile(pkgname, userId)) {
437                res = error("Failed to clear current profile for " + packageName);
438            }
439        }
440    }
441    return res;
442}
443
444static int destroy_app_reference_profile(const char *pkgname) {
445    return delete_dir_contents_and_dir(
446        create_data_ref_profile_package_path(pkgname),
447        /*ignore_if_missing*/ true);
448}
449
450static int destroy_app_current_profiles(const char *pkgname, userid_t userid) {
451    return delete_dir_contents_and_dir(
452        create_data_user_profile_package_path(userid, pkgname),
453        /*ignore_if_missing*/ true);
454}
455
456binder::Status InstalldNativeService::destroyAppProfiles(const std::string& packageName) {
457    ENFORCE_UID(AID_SYSTEM);
458    CHECK_ARGUMENT_PACKAGE_NAME(packageName);
459
460    const char* pkgname = packageName.c_str();
461    binder::Status res = ok();
462    std::vector<userid_t> users = get_known_users(/*volume_uuid*/ nullptr);
463    for (auto user : users) {
464        if (destroy_app_current_profiles(pkgname, user) != 0) {
465            res = error("Failed to destroy current profiles for " + packageName);
466        }
467    }
468    if (destroy_app_reference_profile(pkgname) != 0) {
469        res = error("Failed to destroy reference profile for " + packageName);
470    }
471    return res;
472}
473
474binder::Status InstalldNativeService::destroyAppData(const std::unique_ptr<std::string>& uuid,
475        const std::string& packageName, int32_t userId, int32_t flags, int64_t ceDataInode) {
476    ENFORCE_UID(AID_SYSTEM);
477    CHECK_ARGUMENT_UUID(uuid);
478    CHECK_ARGUMENT_PACKAGE_NAME(packageName);
479
480    const char* uuid_ = uuid ? uuid->c_str() : nullptr;
481    const char* pkgname = packageName.c_str();
482
483    binder::Status res = ok();
484    if (flags & FLAG_STORAGE_CE) {
485        auto path = create_data_user_ce_package_path(uuid_, userId, pkgname, ceDataInode);
486        if (delete_dir_contents_and_dir(path) != 0) {
487            res = error("Failed to delete " + path);
488        }
489    }
490    if (flags & FLAG_STORAGE_DE) {
491        auto path = create_data_user_de_package_path(uuid_, userId, pkgname);
492        if (delete_dir_contents_and_dir(path) != 0) {
493            res = error("Failed to delete " + path);
494        }
495        destroy_app_current_profiles(pkgname, userId);
496        // TODO(calin): If the package is still installed by other users it's probably
497        // beneficial to keep the reference profile around.
498        // Verify if it's ok to do that.
499        destroy_app_reference_profile(pkgname);
500    }
501    return res;
502}
503
504binder::Status InstalldNativeService::moveCompleteApp(const std::unique_ptr<std::string>& fromUuid,
505        const std::unique_ptr<std::string>& toUuid, const std::string& packageName,
506        const std::string& dataAppName, int32_t appId, const std::string& seInfo,
507        int32_t targetSdkVersion) {
508    ENFORCE_UID(AID_SYSTEM);
509    CHECK_ARGUMENT_UUID(fromUuid);
510    CHECK_ARGUMENT_UUID(toUuid);
511    CHECK_ARGUMENT_PACKAGE_NAME(packageName);
512
513    const char* from_uuid = fromUuid ? fromUuid->c_str() : nullptr;
514    const char* to_uuid = toUuid ? toUuid->c_str() : nullptr;
515    const char* package_name = packageName.c_str();
516    const char* data_app_name = dataAppName.c_str();
517
518    binder::Status res = ok();
519    std::vector<userid_t> users = get_known_users(from_uuid);
520
521    // Copy app
522    {
523        auto from = create_data_app_package_path(from_uuid, data_app_name);
524        auto to = create_data_app_package_path(to_uuid, data_app_name);
525        auto to_parent = create_data_app_path(to_uuid);
526
527        char *argv[] = {
528            (char*) kCpPath,
529            (char*) "-F", /* delete any existing destination file first (--remove-destination) */
530            (char*) "-p", /* preserve timestamps, ownership, and permissions */
531            (char*) "-R", /* recurse into subdirectories (DEST must be a directory) */
532            (char*) "-P", /* Do not follow symlinks [default] */
533            (char*) "-d", /* don't dereference symlinks */
534            (char*) from.c_str(),
535            (char*) to_parent.c_str()
536        };
537
538        LOG(DEBUG) << "Copying " << from << " to " << to;
539        int rc = android_fork_execvp(ARRAY_SIZE(argv), argv, NULL, false, true);
540        if (rc != 0) {
541            res = error(rc, "Failed copying " + from + " to " + to);
542            goto fail;
543        }
544
545        if (selinux_android_restorecon(to.c_str(), SELINUX_ANDROID_RESTORECON_RECURSE) != 0) {
546            res = error("Failed to restorecon " + to);
547            goto fail;
548        }
549    }
550
551    // Copy private data for all known users
552    for (auto user : users) {
553
554        // Data source may not exist for all users; that's okay
555        auto from_ce = create_data_user_ce_package_path(from_uuid, user, package_name);
556        if (access(from_ce.c_str(), F_OK) != 0) {
557            LOG(INFO) << "Missing source " << from_ce;
558            continue;
559        }
560
561        if (!createAppData(toUuid, packageName, user, FLAG_STORAGE_CE | FLAG_STORAGE_DE, appId,
562                seInfo, targetSdkVersion).isOk()) {
563            res = error("Failed to create package target");
564            goto fail;
565        }
566
567        char *argv[] = {
568            (char*) kCpPath,
569            (char*) "-F", /* delete any existing destination file first (--remove-destination) */
570            (char*) "-p", /* preserve timestamps, ownership, and permissions */
571            (char*) "-R", /* recurse into subdirectories (DEST must be a directory) */
572            (char*) "-P", /* Do not follow symlinks [default] */
573            (char*) "-d", /* don't dereference symlinks */
574            nullptr,
575            nullptr
576        };
577
578        {
579            auto from = create_data_user_de_package_path(from_uuid, user, package_name);
580            auto to = create_data_user_de_path(to_uuid, user);
581            argv[6] = (char*) from.c_str();
582            argv[7] = (char*) to.c_str();
583
584            LOG(DEBUG) << "Copying " << from << " to " << to;
585            int rc = android_fork_execvp(ARRAY_SIZE(argv), argv, NULL, false, true);
586            if (rc != 0) {
587                res = error(rc, "Failed copying " + from + " to " + to);
588                goto fail;
589            }
590        }
591        {
592            auto from = create_data_user_ce_package_path(from_uuid, user, package_name);
593            auto to = create_data_user_ce_path(to_uuid, user);
594            argv[6] = (char*) from.c_str();
595            argv[7] = (char*) to.c_str();
596
597            LOG(DEBUG) << "Copying " << from << " to " << to;
598            int rc = android_fork_execvp(ARRAY_SIZE(argv), argv, NULL, false, true);
599            if (rc != 0) {
600                res = error(rc, "Failed copying " + from + " to " + to);
601                goto fail;
602            }
603        }
604
605        if (!restoreconAppData(toUuid, packageName, user, FLAG_STORAGE_CE | FLAG_STORAGE_DE,
606                appId, seInfo).isOk()) {
607            res = error("Failed to restorecon");
608            goto fail;
609        }
610    }
611
612    // We let the framework scan the new location and persist that before
613    // deleting the data in the old location; this ordering ensures that
614    // we can recover from things like battery pulls.
615    return ok();
616
617fail:
618    // Nuke everything we might have already copied
619    {
620        auto to = create_data_app_package_path(to_uuid, data_app_name);
621        if (delete_dir_contents(to.c_str(), 1, NULL) != 0) {
622            LOG(WARNING) << "Failed to rollback " << to;
623        }
624    }
625    for (auto user : users) {
626        {
627            auto to = create_data_user_de_package_path(to_uuid, user, package_name);
628            if (delete_dir_contents(to.c_str(), 1, NULL) != 0) {
629                LOG(WARNING) << "Failed to rollback " << to;
630            }
631        }
632        {
633            auto to = create_data_user_ce_package_path(to_uuid, user, package_name);
634            if (delete_dir_contents(to.c_str(), 1, NULL) != 0) {
635                LOG(WARNING) << "Failed to rollback " << to;
636            }
637        }
638    }
639    return res;
640}
641
642binder::Status InstalldNativeService::createUserData(const std::unique_ptr<std::string>& uuid,
643        int32_t userId, int32_t userSerial ATTRIBUTE_UNUSED, int32_t flags) {
644    ENFORCE_UID(AID_SYSTEM);
645    CHECK_ARGUMENT_UUID(uuid);
646
647    const char* uuid_ = uuid ? uuid->c_str() : nullptr;
648    if (flags & FLAG_STORAGE_DE) {
649        if (uuid_ == nullptr) {
650            if (ensure_config_user_dirs(userId) != 0) {
651                return error(StringPrintf("Failed to ensure dirs for %d", userId));
652            }
653        }
654    }
655    return ok();
656}
657
658binder::Status InstalldNativeService::destroyUserData(const std::unique_ptr<std::string>& uuid,
659        int32_t userId, int32_t flags) {
660    ENFORCE_UID(AID_SYSTEM);
661    CHECK_ARGUMENT_UUID(uuid);
662
663    const char* uuid_ = uuid ? uuid->c_str() : nullptr;
664    binder::Status res = ok();
665    if (flags & FLAG_STORAGE_DE) {
666        auto path = create_data_user_de_path(uuid_, userId);
667        if (delete_dir_contents_and_dir(path, true) != 0) {
668            res = error("Failed to delete " + path);
669        }
670        if (uuid_ == nullptr) {
671            path = create_data_misc_legacy_path(userId);
672            if (delete_dir_contents_and_dir(path, true) != 0) {
673                res = error("Failed to delete " + path);
674            }
675            path = create_data_user_profiles_path(userId);
676            if (delete_dir_contents_and_dir(path, true) != 0) {
677                res = error("Failed to delete " + path);
678            }
679        }
680    }
681    if (flags & FLAG_STORAGE_CE) {
682        auto path = create_data_user_ce_path(uuid_, userId);
683        if (delete_dir_contents_and_dir(path, true) != 0) {
684            res = error("Failed to delete " + path);
685        }
686        path = create_data_media_path(uuid_, userId);
687        if (delete_dir_contents_and_dir(path, true) != 0) {
688            res = error("Failed to delete " + path);
689        }
690    }
691    return res;
692}
693
694/* Try to ensure free_size bytes of storage are available.
695 * Returns 0 on success.
696 * This is rather simple-minded because doing a full LRU would
697 * be potentially memory-intensive, and without atime it would
698 * also require that apps constantly modify file metadata even
699 * when just reading from the cache, which is pretty awful.
700 */
701binder::Status InstalldNativeService::freeCache(const std::unique_ptr<std::string>& uuid,
702        int64_t freeStorageSize) {
703    ENFORCE_UID(AID_SYSTEM);
704    CHECK_ARGUMENT_UUID(uuid);
705
706    const char* uuid_ = uuid ? uuid->c_str() : nullptr;
707    cache_t* cache;
708    int64_t avail;
709
710    auto data_path = create_data_path(uuid_);
711
712    avail = data_disk_free(data_path);
713    if (avail < 0) {
714        return error("Failed to determine free space for " + data_path);
715    }
716
717    ALOGI("free_cache(%" PRId64 ") avail %" PRId64 "\n", freeStorageSize, avail);
718    if (avail >= freeStorageSize) {
719        return ok();
720    }
721
722    cache = start_cache_collection();
723
724    auto users = get_known_users(uuid_);
725    for (auto user : users) {
726        add_cache_files(cache, create_data_user_ce_path(uuid_, user));
727        add_cache_files(cache, create_data_user_de_path(uuid_, user));
728        add_cache_files(cache,
729                StringPrintf("%s/Android/data", create_data_media_path(uuid_, user).c_str()));
730    }
731
732    clear_cache_files(data_path, cache, freeStorageSize);
733    finish_cache_collection(cache);
734
735    avail = data_disk_free(data_path);
736    if (avail >= freeStorageSize) {
737        return ok();
738    } else {
739        return error(StringPrintf("Failed to free up %" PRId64 " on %s; final free space %" PRId64,
740                freeStorageSize, data_path.c_str(), avail));
741    }
742}
743
744binder::Status InstalldNativeService::rmdex(const std::string& codePath,
745        const std::string& instructionSet) {
746    ENFORCE_UID(AID_SYSTEM);
747    char dex_path[PKG_PATH_MAX];
748
749    const char* path = codePath.c_str();
750    const char* instruction_set = instructionSet.c_str();
751
752    if (validate_apk_path(path) && validate_system_app_path(path)) {
753        return error("Invalid path " + codePath);
754    }
755
756    if (!create_cache_path(dex_path, path, instruction_set)) {
757        return error("Failed to create cache path for " + codePath);
758    }
759
760    ALOGV("unlink %s\n", dex_path);
761    if (unlink(dex_path) < 0) {
762        return error(StringPrintf("Failed to unlink %s", dex_path));
763    } else {
764        return ok();
765    }
766}
767
768static void add_app_data_size(std::string& path, int64_t *codesize, int64_t *datasize,
769        int64_t *cachesize) {
770    DIR *d;
771    int dfd;
772    struct dirent *de;
773    struct stat s;
774
775    d = opendir(path.c_str());
776    if (d == nullptr) {
777        PLOG(WARNING) << "Failed to open " << path;
778        return;
779    }
780    dfd = dirfd(d);
781    while ((de = readdir(d))) {
782        const char *name = de->d_name;
783
784        int64_t statsize = 0;
785        if (fstatat(dfd, name, &s, AT_SYMLINK_NOFOLLOW) == 0) {
786            statsize = stat_size(&s);
787        }
788
789        if (de->d_type == DT_DIR) {
790            int subfd;
791            int64_t dirsize = 0;
792            /* always skip "." and ".." */
793            if (name[0] == '.') {
794                if (name[1] == 0) continue;
795                if ((name[1] == '.') && (name[2] == 0)) continue;
796            }
797            subfd = openat(dfd, name, O_RDONLY | O_DIRECTORY);
798            if (subfd >= 0) {
799                dirsize = calculate_dir_size(subfd);
800                close(subfd);
801            }
802            // TODO: check xattrs!
803            if (!strcmp(name, "cache") || !strcmp(name, "code_cache")) {
804                *datasize += statsize;
805                *cachesize += dirsize;
806            } else {
807                *datasize += dirsize + statsize;
808            }
809        } else if (de->d_type == DT_LNK && !strcmp(name, "lib")) {
810            *codesize += statsize;
811        } else {
812            *datasize += statsize;
813        }
814    }
815    closedir(d);
816}
817
818binder::Status InstalldNativeService::getAppSize(const std::unique_ptr<std::string>& uuid,
819        const std::string& packageName, int32_t userId, int32_t flags, int64_t ceDataInode,
820        const std::string& codePath, std::vector<int64_t>* _aidl_return) {
821    ENFORCE_UID(AID_SYSTEM);
822    CHECK_ARGUMENT_UUID(uuid);
823    CHECK_ARGUMENT_PACKAGE_NAME(packageName);
824
825    const char* uuid_ = uuid ? uuid->c_str() : nullptr;
826    const char* pkgname = packageName.c_str();
827    const char* code_path = codePath.c_str();
828
829    DIR *d;
830    int dfd;
831    int64_t codesize = 0;
832    int64_t datasize = 0;
833    int64_t cachesize = 0;
834    int64_t asecsize = 0;
835
836    d = opendir(code_path);
837    if (d != nullptr) {
838        dfd = dirfd(d);
839        codesize += calculate_dir_size(dfd);
840        closedir(d);
841    }
842
843    if (flags & FLAG_STORAGE_CE) {
844        auto path = create_data_user_ce_package_path(uuid_, userId, pkgname, ceDataInode);
845        add_app_data_size(path, &codesize, &datasize, &cachesize);
846    }
847    if (flags & FLAG_STORAGE_DE) {
848        auto path = create_data_user_de_package_path(uuid_, userId, pkgname);
849        add_app_data_size(path, &codesize, &datasize, &cachesize);
850    }
851
852    std::vector<int64_t> res;
853    res.push_back(codesize);
854    res.push_back(datasize);
855    res.push_back(cachesize);
856    res.push_back(asecsize);
857    *_aidl_return = res;
858    return ok();
859}
860
861binder::Status InstalldNativeService::getAppDataInode(const std::unique_ptr<std::string>& uuid,
862        const std::string& packageName, int32_t userId, int32_t flags, int64_t* _aidl_return) {
863    ENFORCE_UID(AID_SYSTEM);
864    CHECK_ARGUMENT_UUID(uuid);
865    CHECK_ARGUMENT_PACKAGE_NAME(packageName);
866
867    const char* uuid_ = uuid ? uuid->c_str() : nullptr;
868    const char* pkgname = packageName.c_str();
869
870    if (flags & FLAG_STORAGE_CE) {
871        auto path = create_data_user_ce_package_path(uuid_, userId, pkgname);
872        if (get_path_inode(path, reinterpret_cast<ino_t*>(_aidl_return)) == 0) {
873            return ok();
874        } else {
875            return error("Failed to get_path_inode for " + path);
876        }
877    }
878    return exception(binder::Status::EX_UNSUPPORTED_OPERATION);
879}
880
881// Dumps the contents of a profile file, using pkgname's dex files for pretty
882// printing the result.
883binder::Status InstalldNativeService::dumpProfiles(int32_t uid, const std::string& packageName,
884        const std::string& codePaths, bool* _aidl_return) {
885    ENFORCE_UID(AID_SYSTEM);
886    CHECK_ARGUMENT_PACKAGE_NAME(packageName);
887
888    const char* pkgname = packageName.c_str();
889    const char* code_paths = codePaths.c_str();
890
891    *_aidl_return = dump_profiles(uid, pkgname, code_paths);
892    return ok();
893}
894
895// TODO: Consider returning error codes.
896binder::Status InstalldNativeService::mergeProfiles(int32_t uid, const std::string& packageName,
897        bool* _aidl_return) {
898    ENFORCE_UID(AID_SYSTEM);
899    CHECK_ARGUMENT_PACKAGE_NAME(packageName);
900
901    const char* pkgname = packageName.c_str();
902    *_aidl_return = analyse_profiles(uid, pkgname);
903    return ok();
904}
905
906binder::Status InstalldNativeService::dexopt(const std::string& apkPath, int32_t uid,
907        const std::unique_ptr<std::string>& packageName, const std::string& instructionSet,
908        int32_t dexoptNeeded, const std::unique_ptr<std::string>& outputPath, int32_t dexFlags,
909        const std::string& compilerFilter, const std::unique_ptr<std::string>& uuid,
910        const std::unique_ptr<std::string>& sharedLibraries) {
911    ENFORCE_UID(AID_SYSTEM);
912    CHECK_ARGUMENT_UUID(uuid);
913    if (packageName && *packageName != "*") {
914        CHECK_ARGUMENT_PACKAGE_NAME(*packageName);
915    }
916
917    const char* apk_path = apkPath.c_str();
918    const char* pkgname = packageName ? packageName->c_str() : "*";
919    const char* instruction_set = instructionSet.c_str();
920    const char* oat_dir = outputPath ? outputPath->c_str() : nullptr;
921    const char* compiler_filter = compilerFilter.c_str();
922    const char* volume_uuid = uuid ? uuid->c_str() : nullptr;
923    const char* shared_libraries = sharedLibraries ? sharedLibraries->c_str() : nullptr;
924
925    int res = android::installd::dexopt(apk_path, uid, pkgname, instruction_set, dexoptNeeded,
926            oat_dir, dexFlags, compiler_filter, volume_uuid, shared_libraries);
927    return res ? error(res, "Failed to dexopt") : ok();
928}
929
930binder::Status InstalldNativeService::markBootComplete(const std::string& instructionSet) {
931    ENFORCE_UID(AID_SYSTEM);
932    const char* instruction_set = instructionSet.c_str();
933
934    char boot_marker_path[PKG_PATH_MAX];
935    sprintf(boot_marker_path,
936          "%s/%s/%s/.booting",
937          android_data_dir.path,
938          DALVIK_CACHE,
939          instruction_set);
940
941    ALOGV("mark_boot_complete : %s", boot_marker_path);
942    if (unlink(boot_marker_path) != 0) {
943        return error(StringPrintf("Failed to unlink %s", boot_marker_path));
944    }
945    return ok();
946}
947
948void mkinnerdirs(char* path, int basepos, mode_t mode, int uid, int gid,
949        struct stat* statbuf)
950{
951    while (path[basepos] != 0) {
952        if (path[basepos] == '/') {
953            path[basepos] = 0;
954            if (lstat(path, statbuf) < 0) {
955                ALOGV("Making directory: %s\n", path);
956                if (mkdir(path, mode) == 0) {
957                    chown(path, uid, gid);
958                } else {
959                    ALOGW("Unable to make directory %s: %s\n", path, strerror(errno));
960                }
961            }
962            path[basepos] = '/';
963            basepos++;
964        }
965        basepos++;
966    }
967}
968
969binder::Status InstalldNativeService::linkNativeLibraryDirectory(
970        const std::unique_ptr<std::string>& uuid, const std::string& packageName,
971        const std::string& nativeLibPath32, int32_t userId) {
972    ENFORCE_UID(AID_SYSTEM);
973    CHECK_ARGUMENT_UUID(uuid);
974    CHECK_ARGUMENT_PACKAGE_NAME(packageName);
975
976    const char* uuid_ = uuid ? uuid->c_str() : nullptr;
977    const char* pkgname = packageName.c_str();
978    const char* asecLibDir = nativeLibPath32.c_str();
979    struct stat s, libStat;
980    binder::Status res = ok();
981
982    auto _pkgdir = create_data_user_ce_package_path(uuid_, userId, pkgname);
983    auto _libsymlink = _pkgdir + PKG_LIB_POSTFIX;
984
985    const char* pkgdir = _pkgdir.c_str();
986    const char* libsymlink = _libsymlink.c_str();
987
988    if (stat(pkgdir, &s) < 0) {
989        return error("Failed to stat " + _pkgdir);
990    }
991
992    if (chown(pkgdir, AID_INSTALL, AID_INSTALL) < 0) {
993        return error("Failed to chown " + _pkgdir);
994    }
995
996    if (chmod(pkgdir, 0700) < 0) {
997        res = error("Failed to chmod " + _pkgdir);
998        goto out;
999    }
1000
1001    if (lstat(libsymlink, &libStat) < 0) {
1002        if (errno != ENOENT) {
1003            res = error("Failed to stat " + _libsymlink);
1004            goto out;
1005        }
1006    } else {
1007        if (S_ISDIR(libStat.st_mode)) {
1008            if (delete_dir_contents(libsymlink, 1, NULL) < 0) {
1009                res = error("Failed to delete " + _libsymlink);
1010                goto out;
1011            }
1012        } else if (S_ISLNK(libStat.st_mode)) {
1013            if (unlink(libsymlink) < 0) {
1014                res = error("Failed to unlink " + _libsymlink);
1015                goto out;
1016            }
1017        }
1018    }
1019
1020    if (symlink(asecLibDir, libsymlink) < 0) {
1021        res = error("Failed to symlink " + _libsymlink + " to " + nativeLibPath32);
1022        goto out;
1023    }
1024
1025out:
1026    if (chmod(pkgdir, s.st_mode) < 0) {
1027        auto msg = "Failed to cleanup chmod " + _pkgdir;
1028        if (res.isOk()) {
1029            res = error(msg);
1030        } else {
1031            PLOG(ERROR) << msg;
1032        }
1033    }
1034
1035    if (chown(pkgdir, s.st_uid, s.st_gid) < 0) {
1036        auto msg = "Failed to cleanup chown " + _pkgdir;
1037        if (res.isOk()) {
1038            res = error(msg);
1039        } else {
1040            PLOG(ERROR) << msg;
1041        }
1042    }
1043
1044    return res;
1045}
1046
1047static void run_idmap(const char *target_apk, const char *overlay_apk, int idmap_fd)
1048{
1049    static const char *IDMAP_BIN = "/system/bin/idmap";
1050    static const size_t MAX_INT_LEN = 32;
1051    char idmap_str[MAX_INT_LEN];
1052
1053    snprintf(idmap_str, sizeof(idmap_str), "%d", idmap_fd);
1054
1055    execl(IDMAP_BIN, IDMAP_BIN, "--fd", target_apk, overlay_apk, idmap_str, (char*)NULL);
1056    ALOGE("execl(%s) failed: %s\n", IDMAP_BIN, strerror(errno));
1057}
1058
1059// Transform string /a/b/c.apk to (prefix)/a@b@c.apk@(suffix)
1060// eg /a/b/c.apk to /data/resource-cache/a@b@c.apk@idmap
1061static int flatten_path(const char *prefix, const char *suffix,
1062        const char *overlay_path, char *idmap_path, size_t N)
1063{
1064    if (overlay_path == NULL || idmap_path == NULL) {
1065        return -1;
1066    }
1067    const size_t len_overlay_path = strlen(overlay_path);
1068    // will access overlay_path + 1 further below; requires absolute path
1069    if (len_overlay_path < 2 || *overlay_path != '/') {
1070        return -1;
1071    }
1072    const size_t len_idmap_root = strlen(prefix);
1073    const size_t len_suffix = strlen(suffix);
1074    if (SIZE_MAX - len_idmap_root < len_overlay_path ||
1075            SIZE_MAX - (len_idmap_root + len_overlay_path) < len_suffix) {
1076        // additions below would cause overflow
1077        return -1;
1078    }
1079    if (N < len_idmap_root + len_overlay_path + len_suffix) {
1080        return -1;
1081    }
1082    memset(idmap_path, 0, N);
1083    snprintf(idmap_path, N, "%s%s%s", prefix, overlay_path + 1, suffix);
1084    char *ch = idmap_path + len_idmap_root;
1085    while (*ch != '\0') {
1086        if (*ch == '/') {
1087            *ch = '@';
1088        }
1089        ++ch;
1090    }
1091    return 0;
1092}
1093
1094binder::Status InstalldNativeService::idmap(const std::string& targetApkPath,
1095        const std::string& overlayApkPath, int32_t uid) {
1096    ENFORCE_UID(AID_SYSTEM);
1097    const char* target_apk = targetApkPath.c_str();
1098    const char* overlay_apk = overlayApkPath.c_str();
1099    ALOGV("idmap target_apk=%s overlay_apk=%s uid=%d\n", target_apk, overlay_apk, uid);
1100
1101    int idmap_fd = -1;
1102    char idmap_path[PATH_MAX];
1103
1104    if (flatten_path(IDMAP_PREFIX, IDMAP_SUFFIX, overlay_apk,
1105                idmap_path, sizeof(idmap_path)) == -1) {
1106        ALOGE("idmap cannot generate idmap path for overlay %s\n", overlay_apk);
1107        goto fail;
1108    }
1109
1110    unlink(idmap_path);
1111    idmap_fd = open(idmap_path, O_RDWR | O_CREAT | O_EXCL, 0644);
1112    if (idmap_fd < 0) {
1113        ALOGE("idmap cannot open '%s' for output: %s\n", idmap_path, strerror(errno));
1114        goto fail;
1115    }
1116    if (fchown(idmap_fd, AID_SYSTEM, uid) < 0) {
1117        ALOGE("idmap cannot chown '%s'\n", idmap_path);
1118        goto fail;
1119    }
1120    if (fchmod(idmap_fd, S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH) < 0) {
1121        ALOGE("idmap cannot chmod '%s'\n", idmap_path);
1122        goto fail;
1123    }
1124
1125    pid_t pid;
1126    pid = fork();
1127    if (pid == 0) {
1128        /* child -- drop privileges before continuing */
1129        if (setgid(uid) != 0) {
1130            ALOGE("setgid(%d) failed during idmap\n", uid);
1131            exit(1);
1132        }
1133        if (setuid(uid) != 0) {
1134            ALOGE("setuid(%d) failed during idmap\n", uid);
1135            exit(1);
1136        }
1137        if (flock(idmap_fd, LOCK_EX | LOCK_NB) != 0) {
1138            ALOGE("flock(%s) failed during idmap: %s\n", idmap_path, strerror(errno));
1139            exit(1);
1140        }
1141
1142        run_idmap(target_apk, overlay_apk, idmap_fd);
1143        exit(1); /* only if exec call to idmap failed */
1144    } else {
1145        int status = wait_child(pid);
1146        if (status != 0) {
1147            ALOGE("idmap failed, status=0x%04x\n", status);
1148            goto fail;
1149        }
1150    }
1151
1152    close(idmap_fd);
1153    return ok();
1154fail:
1155    if (idmap_fd >= 0) {
1156        close(idmap_fd);
1157        unlink(idmap_path);
1158    }
1159    return error();
1160}
1161
1162binder::Status InstalldNativeService::restoreconAppData(const std::unique_ptr<std::string>& uuid,
1163        const std::string& packageName, int32_t userId, int32_t flags, int32_t appId,
1164        const std::string& seInfo) {
1165    ENFORCE_UID(AID_SYSTEM);
1166    CHECK_ARGUMENT_UUID(uuid);
1167    CHECK_ARGUMENT_PACKAGE_NAME(packageName);
1168
1169    binder::Status res = ok();
1170
1171    // SELINUX_ANDROID_RESTORECON_DATADATA flag is set by libselinux. Not needed here.
1172    unsigned int seflags = SELINUX_ANDROID_RESTORECON_RECURSE;
1173    const char* uuid_ = uuid ? uuid->c_str() : nullptr;
1174    const char* pkgName = packageName.c_str();
1175    const char* seinfo = seInfo.c_str();
1176
1177    uid_t uid = multiuser_get_uid(userId, appId);
1178    if (flags & FLAG_STORAGE_CE) {
1179        auto path = create_data_user_ce_package_path(uuid_, userId, pkgName);
1180        if (selinux_android_restorecon_pkgdir(path.c_str(), seinfo, uid, seflags) < 0) {
1181            res = error("restorecon failed for " + path);
1182        }
1183    }
1184    if (flags & FLAG_STORAGE_DE) {
1185        auto path = create_data_user_de_package_path(uuid_, userId, pkgName);
1186        if (selinux_android_restorecon_pkgdir(path.c_str(), seinfo, uid, seflags) < 0) {
1187            res = error("restorecon failed for " + path);
1188        }
1189    }
1190    return res;
1191}
1192
1193binder::Status InstalldNativeService::createOatDir(const std::string& oatDir,
1194        const std::string& instructionSet) {
1195    ENFORCE_UID(AID_SYSTEM);
1196    const char* oat_dir = oatDir.c_str();
1197    const char* instruction_set = instructionSet.c_str();
1198    char oat_instr_dir[PKG_PATH_MAX];
1199
1200    if (validate_apk_path(oat_dir)) {
1201        return error("Invalid path " + oatDir);
1202    }
1203    if (fs_prepare_dir(oat_dir, S_IRWXU | S_IRWXG | S_IXOTH, AID_SYSTEM, AID_INSTALL)) {
1204        return error("Failed to prepare " + oatDir);
1205    }
1206    if (selinux_android_restorecon(oat_dir, 0)) {
1207        return error("Failed to restorecon " + oatDir);
1208    }
1209    snprintf(oat_instr_dir, PKG_PATH_MAX, "%s/%s", oat_dir, instruction_set);
1210    if (fs_prepare_dir(oat_instr_dir, S_IRWXU | S_IRWXG | S_IXOTH, AID_SYSTEM, AID_INSTALL)) {
1211        return error(StringPrintf("Failed to prepare %s", oat_instr_dir));
1212    }
1213    return ok();
1214}
1215
1216binder::Status InstalldNativeService::rmPackageDir(const std::string& packageDir) {
1217    ENFORCE_UID(AID_SYSTEM);
1218    if (validate_apk_path(packageDir.c_str())) {
1219        return error("Invalid path " + packageDir);
1220    }
1221    if (delete_dir_contents_and_dir(packageDir) != 0) {
1222        return error("Failed to delete " + packageDir);
1223    }
1224    return ok();
1225}
1226
1227binder::Status InstalldNativeService::linkFile(const std::string& relativePath,
1228        const std::string& fromBase, const std::string& toBase) {
1229    ENFORCE_UID(AID_SYSTEM);
1230    const char* relative_path = relativePath.c_str();
1231    const char* from_base = fromBase.c_str();
1232    const char* to_base = toBase.c_str();
1233    char from_path[PKG_PATH_MAX];
1234    char to_path[PKG_PATH_MAX];
1235    snprintf(from_path, PKG_PATH_MAX, "%s/%s", from_base, relative_path);
1236    snprintf(to_path, PKG_PATH_MAX, "%s/%s", to_base, relative_path);
1237
1238    if (validate_apk_path_subdirs(from_path)) {
1239        return error(StringPrintf("Invalid from path %s", from_path));
1240    }
1241
1242    if (validate_apk_path_subdirs(to_path)) {
1243        return error(StringPrintf("Invalid to path %s", to_path));
1244    }
1245
1246    if (link(from_path, to_path) < 0) {
1247        return error(StringPrintf("Failed to link from %s to %s", from_path, to_path));
1248    }
1249
1250    return ok();
1251}
1252
1253binder::Status InstalldNativeService::moveAb(const std::string& apkPath,
1254        const std::string& instructionSet, const std::string& outputPath) {
1255    ENFORCE_UID(AID_SYSTEM);
1256
1257    const char* apk_path = apkPath.c_str();
1258    const char* instruction_set = instructionSet.c_str();
1259    const char* oat_dir = outputPath.c_str();
1260
1261    bool success = move_ab(apk_path, instruction_set, oat_dir);
1262    return success ? ok() : error();
1263}
1264
1265binder::Status InstalldNativeService::deleteOdex(const std::string& apkPath,
1266        const std::string& instructionSet, const std::string& outputPath) {
1267    ENFORCE_UID(AID_SYSTEM);
1268
1269    const char* apk_path = apkPath.c_str();
1270    const char* instruction_set = instructionSet.c_str();
1271    const char* oat_dir = outputPath.c_str();
1272
1273    bool res = delete_odex(apk_path, instruction_set, oat_dir);
1274    return res ? ok() : error();
1275}
1276
1277}  // namespace installd
1278}  // namespace android
1279