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