90 lines
2.7 KiB
C++
90 lines
2.7 KiB
C++
/*
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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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#include "VintfObjectRecovery.h"
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#include <android-base/properties.h>
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#include <sys/mount.h>
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#include <fs_mgr.h>
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#include "utils.h"
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namespace android {
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namespace vintf {
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namespace details {
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using FstabMgr = std::unique_ptr<struct fstab, decltype(&fs_mgr_free_fstab)>;
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static status_t mountAt(const FstabMgr &fstab, const char* path, const char* mount_point) {
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fstab_rec* rec = fs_mgr_get_entry_for_mount_point(fstab.get(), path);
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if (rec == nullptr) {
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return UNKNOWN_ERROR;
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}
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int result = mount(rec->blk_device, mount_point, rec->fs_type, rec->flags, rec->fs_options);
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return result == 0 ? OK : -errno;
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}
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static FstabMgr defaultFstabMgr() {
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return FstabMgr{fs_mgr_read_fstab_default(), &fs_mgr_free_fstab};
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}
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class RecoveryPartitionMounter : public PartitionMounter {
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public:
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status_t mountSystem() const override {
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FstabMgr fstab = defaultFstabMgr();
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if (fstab == NULL) {
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return UNKNOWN_ERROR;
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}
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if (android::base::GetBoolProperty("ro.build.system_root_image", false)) {
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return mountAt(fstab, "/", "/system_root");
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} else {
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return mountAt(fstab, "/system", "/system");
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}
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}
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status_t mountVendor() const override {
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FstabMgr fstab = defaultFstabMgr();
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if (fstab == NULL) {
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return UNKNOWN_ERROR;
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}
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return mountAt(fstab, "/vendor", "/vendor");
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}
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status_t umountSystem() const override {
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if (android::base::GetBoolProperty("ro.build.system_root_image", false)) {
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return umount("/system_root");
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} else {
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return umount("/system");
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}
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}
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status_t umountVendor() const override {
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return umount("/vendor");
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}
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};
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} // namespace details
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// static
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int32_t VintfObjectRecovery::CheckCompatibility(
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const std::vector<std::string> &xmls, std::string *error) {
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static details::RecoveryPartitionMounter mounter;
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return details::checkCompatibility(xmls, true /* mount */, mounter, error);
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}
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} // namespace vintf
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} // namespace android
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