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      1 /*
      2  * Copyright (C) 2010 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 #define LOG_TAG "MtpStorage"
     18 
     19 #include "MtpDebug.h"
     20 #include "MtpDatabase.h"
     21 #include "MtpStorage.h"
     22 
     23 #include <sys/types.h>
     24 #include <sys/stat.h>
     25 #include <sys/statfs.h>
     26 #include <unistd.h>
     27 #include <dirent.h>
     28 #include <errno.h>
     29 #include <string.h>
     30 #include <stdio.h>
     31 #include <limits.h>
     32 
     33 namespace android {
     34 
     35 MtpStorage::MtpStorage(MtpStorageID id, const char* filePath,
     36         const char* description, uint64_t reserveSpace,
     37         bool removable, uint64_t maxFileSize)
     38     :   mStorageID(id),
     39         mFilePath(filePath),
     40         mDescription(description),
     41         mMaxCapacity(0),
     42         mMaxFileSize(maxFileSize),
     43         mReserveSpace(reserveSpace),
     44         mRemovable(removable)
     45 {
     46     ALOGV("MtpStorage id: %d path: %s\n", id, filePath);
     47 }
     48 
     49 MtpStorage::~MtpStorage() {
     50 }
     51 
     52 int MtpStorage::getType() const {
     53     return (mRemovable ? MTP_STORAGE_REMOVABLE_RAM :  MTP_STORAGE_FIXED_RAM);
     54 }
     55 
     56 int MtpStorage::getFileSystemType() const {
     57     return MTP_STORAGE_FILESYSTEM_HIERARCHICAL;
     58 }
     59 
     60 int MtpStorage::getAccessCapability() const {
     61     return MTP_STORAGE_READ_WRITE;
     62 }
     63 
     64 uint64_t MtpStorage::getMaxCapacity() {
     65     if (mMaxCapacity == 0) {
     66         struct statfs   stat;
     67         if (statfs(getPath(), &stat))
     68             return -1;
     69         mMaxCapacity = (uint64_t)stat.f_blocks * (uint64_t)stat.f_bsize;
     70     }
     71     return mMaxCapacity;
     72 }
     73 
     74 uint64_t MtpStorage::getFreeSpace() {
     75     struct statfs   stat;
     76     if (statfs(getPath(), &stat))
     77         return -1;
     78     uint64_t freeSpace = (uint64_t)stat.f_bavail * (uint64_t)stat.f_bsize;
     79     return (freeSpace > mReserveSpace ? freeSpace - mReserveSpace : 0);
     80 }
     81 
     82 const char* MtpStorage::getDescription() const {
     83     return (const char *)mDescription;
     84 }
     85 
     86 }  // namespace android
     87