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 
MtpStorage(MtpStorageID id,const char * filePath,const char * description,uint64_t reserveSpace,bool removable,uint64_t maxFileSize)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 
~MtpStorage()49 MtpStorage::~MtpStorage() {
50 }
51 
getType() const52 int MtpStorage::getType() const {
53     return (mRemovable ? MTP_STORAGE_REMOVABLE_RAM :  MTP_STORAGE_FIXED_RAM);
54 }
55 
getFileSystemType() const56 int MtpStorage::getFileSystemType() const {
57     return MTP_STORAGE_FILESYSTEM_HIERARCHICAL;
58 }
59 
getAccessCapability() const60 int MtpStorage::getAccessCapability() const {
61     return MTP_STORAGE_READ_WRITE;
62 }
63 
getMaxCapacity()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 
getFreeSpace()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 
getDescription() const82 const char* MtpStorage::getDescription() const {
83     return (const char *)mDescription;
84 }
85 
86 }  // namespace android
87