summaryrefslogtreecommitdiffstats
path: root/native/android/storage_manager.cpp
blob: 5e05045418d7f75b17ac887f7bb92e5c2b040128 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
/*
 * Copyright (C) 2010 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

#define LOG_TAG "NStorage"

#include <android/storage_manager.h>
#include <storage/IMountService.h>

#include <binder/Binder.h>
#include <binder/IServiceManager.h>
#include <utils/Atomic.h>
#include <utils/Log.h>
#include <utils/RefBase.h>
#include <utils/String8.h>
#include <utils/String16.h>
#include <utils/Vector.h>
#include <utils/threads.h>


using namespace android;

struct ObbActionListener : public BnObbActionListener {
private:
    sp<AStorageManager> mStorageManager;

public:
    ObbActionListener(AStorageManager* mgr) :
            mStorageManager(mgr)
    {}

    virtual void onObbResult(const android::String16& filename, const int32_t nonce,
            const int32_t state);
};

class ObbCallback {
public:
    ObbCallback(int32_t _nonce, AStorageManager_obbCallbackFunc _cb, void* _data)
            : nonce(_nonce)
            , cb(_cb)
            , data(_data)
    {}

    int32_t nonce;
    AStorageManager_obbCallbackFunc cb;
    void* data;
};

struct AStorageManager : public RefBase {
protected:
    Mutex mCallbackLock;
    Vector<ObbCallback*> mCallbacks;
    volatile int32_t mNextNonce;
    sp<ObbActionListener> mObbActionListener;
    sp<IMountService> mMountService;

    int32_t getNextNonce() {
        return android_atomic_inc(&mNextNonce);
    }

    ObbCallback* registerObbCallback(AStorageManager_obbCallbackFunc func, void* data) {
        ObbCallback* cb = new ObbCallback(getNextNonce(), func, data);
        {
            AutoMutex _l(mCallbackLock);
            mCallbacks.push(cb);
        }
        return cb;
    }

public:
    AStorageManager()
    {
    }

    bool initialize() {
        sp<IServiceManager> sm = defaultServiceManager();
        if (sm == NULL) {
            LOGE("Couldn't get default ServiceManager\n");
            return false;
        }

        mMountService = interface_cast<IMountService>(sm->getService(String16("mount")));
        if (mMountService == NULL) {
            LOGE("Couldn't get connection to MountService\n");
            return false;
        }

        mObbActionListener = new ObbActionListener(this);

        return true;
    }

    void fireCallback(const char* filename, const int32_t nonce, const int32_t state) {
        ObbCallback* target = NULL;
        {
            AutoMutex _l(mCallbackLock);
            int N = mCallbacks.size();
            for (int i = 0; i < N; i++) {
                ObbCallback* cb = mCallbacks.editItemAt(i);
                if (cb->nonce == nonce) {
                    target = cb;
                    mCallbacks.removeAt(i);
                    break;
                }
            }
        }

        if (target != NULL) {
            target->cb(filename, state, target->data);
            delete target;
        } else {
            ALOGI("Didn't find the callback handler for: %s\n", filename);
        }
    }

    void mountObb(const char* filename, const char* key, AStorageManager_obbCallbackFunc func, void* data) {
        ObbCallback* cb = registerObbCallback(func, data);
        String16 filename16(filename);
        String16 key16(key);
        mMountService->mountObb(filename16, key16, mObbActionListener, cb->nonce);
    }

    void unmountObb(const char* filename, const bool force, AStorageManager_obbCallbackFunc func, void* data) {
        ObbCallback* cb = registerObbCallback(func, data);
        String16 filename16(filename);
        mMountService->unmountObb(filename16, force, mObbActionListener, cb->nonce);
    }

    int isObbMounted(const char* filename) {
        String16 filename16(filename);
        return mMountService->isObbMounted(filename16);
    }

    const char* getMountedObbPath(const char* filename) {
        String16 filename16(filename);
        String16 path16;
        if (mMountService->getMountedObbPath(filename16, path16)) {
            return String8(path16).string();
        } else {
            return NULL;
        }
    }
};

void ObbActionListener::onObbResult(const android::String16& filename, const int32_t nonce, const int32_t state) {
    mStorageManager->fireCallback(String8(filename).string(), nonce, state);
}


AStorageManager* AStorageManager_new() {
    sp<AStorageManager> mgr = new AStorageManager();
    if (mgr == NULL || !mgr->initialize()) {
        return NULL;
    }
    mgr->incStrong((void*)AStorageManager_new);
    return static_cast<AStorageManager*>(mgr.get());
}

void AStorageManager_delete(AStorageManager* mgr) {
    if (mgr) {
        mgr->decStrong((void*)AStorageManager_new);
    }
}

void AStorageManager_mountObb(AStorageManager* mgr, const char* filename, const char* key,
        AStorageManager_obbCallbackFunc cb, void* data) {
    mgr->mountObb(filename, key, cb, data);
}

void AStorageManager_unmountObb(AStorageManager* mgr, const char* filename, const int force,
        AStorageManager_obbCallbackFunc cb, void* data) {
    mgr->unmountObb(filename, force != 0, cb, data);
}

int AStorageManager_isObbMounted(AStorageManager* mgr, const char* filename) {
    return mgr->isObbMounted(filename) != 0;
}

const char* AStorageManager_getMountedObbPath(AStorageManager* mgr, const char* filename) {
    return mgr->getMountedObbPath(filename);
}