Merge "Don't try to set quotas on sdcardfs."

 */

#define LOG_TAG "StorageManager"

#include <android-base/file.h>

#include <android-base/logging.h>

#include <android-base/unique_fd.h>

#include <fcntl.h>

namespace android {

static const char* kProcFilesystems = "/proc/filesystems";

// Checks whether the passed in filesystem is listed in /proc/filesystems

static bool IsFilesystemSupported(const std::string& fsType) {

    std::string supported;

    if (!android::base::ReadFileToString(kProcFilesystems, &supported)) {

        PLOG(ERROR) << "Failed to read supported filesystems";

        return false;

    }

    return supported.find(fsType + "\n") != std::string::npos;

}

jboolean android_os_storage_StorageManager_setQuotaProjectId(JNIEnv* env, jobject self,

                                                             jstring path, jlong projectId) {

    struct fsxattr fsx;

    ScopedUtfChars utf_chars_path(env, path);

    static bool sdcardFsSupported = IsFilesystemSupported("sdcardfs");

    if (sdcardFsSupported) {

        // sdcardfs doesn't support project ID quota tracking and takes care of quota

        // in a different way.

        return JNI_TRUE;

    }

    if (projectId > UINT32_MAX) {

        LOG(ERROR) << "Invalid project id: " << projectId;

        return JNI_FALSE;