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Convert to lower fs path for createObb().

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Since /storage/emulated/userId isn't accessible for users != userId,
and vold should anyway try to avoid accessing the FUSE filesystem itself.

Bug: 172078780
Test: atest StorageManagerTest --user-type secondary_user
Change-Id: I98222bf844a6b7d8ec0d9873eddc71f61aa68c90
Merged-In: I98222bf844a6b7d8ec0d9873eddc71f61aa68c90
This commit is contained in:
Martijn Coenen 2020-11-19 10:49:45 +01:00
parent 2c9d6d6675
commit 772008dbca
1 changed files with 35 additions and 1 deletions
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36
VolumeManager.cpp
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@ -1066,8 +1066,42 @@ int VolumeManager::createObb(const std::string& sourcePath, const std::string& s
int32_t ownerGid, std::string* outVolId) {
int id = mNextObbId++;
std::string lowerSourcePath;
// Convert to lower filesystem path
if (StartsWith(sourcePath, "/storage/")) {
auto filter_fn = [&](const VolumeBase& vol) {
if (vol.getState() != VolumeBase::State::kMounted) {
// The volume must be mounted
return false;
}
if ((vol.getMountFlags() & VolumeBase::MountFlags::kVisible) == 0) {
// and visible
return false;
}
if (vol.getInternalPath().empty()) {
return false;
}
if (!sourcePath.empty() && StartsWith(sourcePath, vol.getPath())) {
return true;
}
return false;
};
auto volume = findVolumeWithFilter(filter_fn);
if (volume == nullptr) {
LOG(ERROR) << "Failed to find mounted volume for " << sourcePath;
return -EINVAL;
} else {
lowerSourcePath =
volume->getInternalPath() + sourcePath.substr(volume->getPath().length());
}
} else {
lowerSourcePath = sourcePath;
}
auto vol = std::shared_ptr<android::vold::VolumeBase>(
new android::vold::ObbVolume(id, sourcePath, sourceKey, ownerGid));
new android::vold::ObbVolume(id, lowerSourcePath, sourceKey, ownerGid));
vol->create();
mObbVolumes.push_back(vol);