DirectVolume.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#include <sysutils/NetlinkEvent.h>
26
27#include "DirectVolume.h"
28
29DirectVolume::DirectVolume(const char *label, const char *mount_point, int partIdx) :
30              Volume(label, mount_point) {
31    mPartIdx = partIdx;
32
33    mPaths = new PathCollection();
34}
35
36DirectVolume::~DirectVolume() {
37    PathCollection::iterator it;
38
39    for (it = mPaths->begin(); it != mPaths->end(); ++it)
40        free(*it);
41    delete mPaths;
42}
43
44int DirectVolume::addPath(const char *path) {
45    mPaths->push_back(strdup(path));
46    return 0;
47}
48
49int DirectVolume::handleBlockEvent(NetlinkEvent *evt) {
50    const char *dp = evt->findParam("DEVPATH");
51
52    PathCollection::iterator  it;
53    for (it = mPaths->begin(); it != mPaths->end(); ++it) {
54        if (!strncmp(dp, *it, strlen(*it))) {
55            /* We can handle this disk */
56            int action = evt->getAction();
57            const char *devtype = evt->findParam("DEVTYPE");
58
59            if (!strcmp(devtype, "disk")) {
60                if (action == NetlinkEvent::NlActionAdd)
61                    handleDiskAdded(dp, evt);
62                else if (action == NetlinkEvent::NlActionRemove)
63                    handleDiskRemoved(dp, evt);
64                else
65                    LOGD("Ignoring non add/remove event");
66            } else {
67                if (action == NetlinkEvent::NlActionAdd)
68                    handlePartitionAdded(dp, evt);
69                else if (action == NetlinkEvent::NlActionRemove)
70                    handlePartitionRemoved(dp, evt);
71                else
72                    LOGD("Ignoring non add/remove event");
73            }
74
75            return 0;
76        }
77    }
78    errno = ENODEV;
79    return -1;
80}
81
82void DirectVolume::handleDiskAdded(const char *devpath, NetlinkEvent *evt) {
83    mDiskMaj = atoi(evt->findParam("MAJOR"));
84    mDiskNumParts = atoi(evt->findParam("NPARTS"));
85
86    int partmask = 0;
87    int i;
88    for (i = 1; i <= mDiskNumParts; i++) {
89        partmask |= (1 << i);
90    }
91    mPendingPartMap = partmask;
92
93    if (mDiskNumParts == 0) {
94        LOGD("Dv::diskIns - No partitions - good to go son!");
95        setState(Volume::State_Idle);
96    } else {
97        LOGD("Dv::diskIns - waiting for %d partitions (mask 0x%x)",
98             mDiskNumParts, mPendingPartMap);
99        setState(Volume::State_Pending);
100    }
101}
102
103void DirectVolume::handlePartitionAdded(const char *devpath, NetlinkEvent *evt) {
104    int major = atoi(evt->findParam("MAJOR"));
105    int minor = atoi(evt->findParam("MINOR"));
106    int part_num = atoi(evt->findParam("PARTN"));
107
108    mPendingPartMap &= ~(1 << part_num);
109    if (!mPendingPartMap) {
110        LOGD("Dv:partAdd: Got all partitions - ready to rock!");
111        setState(Volume::State_Idle);
112    } else {
113        LOGD("Dv:partAdd: pending mask now = 0x%x", mPendingPartMap);
114    }
115}
116
117void DirectVolume::handleDiskRemoved(const char *devpath, NetlinkEvent *evt) {
118}
119
120void DirectVolume::handlePartitionRemoved(const char *devpath, NetlinkEvent *evt) {
121}
122
123int DirectVolume::prepareToMount(int *major, int *minor) {
124    errno = ENOSYS;
125    return -1;
126}
127