VolumeManager.cpp revision 49e2bce5b74129c26a35e25d4693cbfe98c4688e 
1/*
2 * Copyright (C) 2008 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#include <stdio.h>
18#include <stdlib.h>
19#include <string.h>
20#include <errno.h>
21
22#define LOG_TAG "Vold"
23
24#include <cutils/log.h>
25
26#include <sysutils/NetlinkEvent.h>
27
28#include "VolumeManager.h"
29#include "DirectVolume.h"
30#include "ErrorCode.h"
31
32VolumeManager *VolumeManager::sInstance = NULL;
33
34VolumeManager *VolumeManager::Instance() {
35    if (!sInstance)
36        sInstance = new VolumeManager();
37    return sInstance;
38}
39
40VolumeManager::VolumeManager() {
41    mBlockDevices = new BlockDeviceCollection();
42    mVolumes = new VolumeCollection();
43    mBroadcaster = NULL;
44}
45
46VolumeManager::~VolumeManager() {
47    delete mBlockDevices;
48}
49
50int VolumeManager::start() {
51    return 0;
52}
53
54int VolumeManager::stop() {
55    return 0;
56}
57
58int VolumeManager::addVolume(Volume *v) {
59    mVolumes->push_back(v);
60    return 0;
61}
62
63void VolumeManager::handleBlockEvent(NetlinkEvent *evt) {
64    const char *devpath = evt->findParam("DEVPATH");
65
66    /* Lookup a volume to handle this device */
67    VolumeCollection::iterator it;
68    bool hit = false;
69    for (it = mVolumes->begin(); it != mVolumes->end(); ++it) {
70        if (!(*it)->handleBlockEvent(evt)) {
71            hit = true;
72            break;
73        }
74    }
75
76    if (!hit) {
77        LOGW("No volumes handled block event for '%s'", devpath);
78    }
79}
80
81int VolumeManager::listVolumes(SocketClient *cli) {
82    VolumeCollection::iterator i;
83
84    for (i = mVolumes->begin(); i != mVolumes->end(); ++i) {
85        char *buffer;
86        asprintf(&buffer, "%s %s %d",
87                 (*i)->getLabel(), (*i)->getMountpoint(),
88                 (*i)->getState());
89        cli->sendMsg(ErrorCode::VolumeListResult, buffer, false);
90        free(buffer);
91    }
92    cli->sendMsg(ErrorCode::CommandOkay, "Volumes listed.", false);
93    return 0;
94}
95
96int VolumeManager::mountVolume(const char *label) {
97    Volume *v = lookupVolume(label);
98
99    if (!v) {
100        errno = ENOENT;
101        return -1;
102    }
103
104    if (v->getState() != Volume::State_Idle) {
105        errno = EBUSY;
106        return -1;
107    }
108
109    return v->mount();
110}
111
112int VolumeManager::unmountVolume(const char *label) {
113    Volume *v = lookupVolume(label);
114
115    if (!v) {
116        errno = ENOENT;
117        return -1;
118    }
119
120    if (v->getState() != Volume::State_Mounted) {
121        errno = EBUSY;
122        return -1;
123    }
124
125    return v->unmount();
126}
127
128Volume *VolumeManager::lookupVolume(const char *label) {
129    VolumeCollection::iterator i;
130
131    for (i = mVolumes->begin(); i != mVolumes->end(); ++i) {
132        if (!strcmp(label, (*i)->getLabel()))
133            return (*i);
134    }
135    return NULL;
136}
137