Jeff Sharkey | deb2405 | 2015-03-02 21:01:40 -0800 | [diff] [blame^] | 1 | /* |
| 2 | * Copyright (C) 2015 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 "Vold" |
| 18 | |
| 19 | #include "Utils.h" |
| 20 | #include "VolumeBase.h" |
| 21 | |
| 22 | #include <cutils/log.h> |
| 23 | |
| 24 | #include <fcntl.h> |
| 25 | #include <stdlib.h> |
| 26 | #include <sys/mount.h> |
| 27 | #include <sys/stat.h> |
| 28 | #include <sys/types.h> |
| 29 | |
| 30 | namespace android { |
| 31 | namespace vold { |
| 32 | |
| 33 | VolumeBase::VolumeBase(VolumeType type) : |
| 34 | mType(type), mState(VolumeState::kUnmounted) { |
| 35 | } |
| 36 | |
| 37 | VolumeBase::~VolumeBase() { |
| 38 | } |
| 39 | |
| 40 | void VolumeBase::setState(VolumeState state) { |
| 41 | mState = state; |
| 42 | |
| 43 | // TODO: publish state up to framework |
| 44 | } |
| 45 | |
| 46 | void VolumeBase::stackVolume(const std::shared_ptr<VolumeBase>& volume) { |
| 47 | mStacked.push_back(volume); |
| 48 | } |
| 49 | |
| 50 | void VolumeBase::unstackVolume(const std::shared_ptr<VolumeBase>& volume) { |
| 51 | mStacked.remove(volume); |
| 52 | } |
| 53 | |
| 54 | status_t VolumeBase::mount() { |
| 55 | if (getState() != VolumeState::kUnmounted) { |
| 56 | SLOGE("Must be unmounted to mount %s", getId().c_str()); |
| 57 | return -EBUSY; |
| 58 | } |
| 59 | |
| 60 | setState(VolumeState::kMounting); |
| 61 | status_t res = doMount(); |
| 62 | if (!res) { |
| 63 | setState(VolumeState::kMounted); |
| 64 | } else { |
| 65 | setState(VolumeState::kCorrupt); |
| 66 | } |
| 67 | |
| 68 | return res; |
| 69 | } |
| 70 | |
| 71 | status_t VolumeBase::unmount() { |
| 72 | if (getState() != VolumeState::kMounted) { |
| 73 | SLOGE("Must be mounted to unmount %s", getId().c_str()); |
| 74 | return -EBUSY; |
| 75 | } |
| 76 | |
| 77 | setState(VolumeState::kUnmounting); |
| 78 | |
| 79 | for (std::string target : mBindTargets) { |
| 80 | ForceUnmount(target); |
| 81 | } |
| 82 | mBindTargets.clear(); |
| 83 | |
| 84 | for (std::shared_ptr<VolumeBase> v : mStacked) { |
| 85 | if (v->unmount()) { |
| 86 | ALOGW("Failed to unmount %s stacked above %s", v->getId().c_str(), |
| 87 | getId().c_str()); |
| 88 | } |
| 89 | } |
| 90 | mStacked.clear(); |
| 91 | |
| 92 | status_t res = doUnmount(); |
| 93 | setState(VolumeState::kUnmounted); |
| 94 | return res; |
| 95 | } |
| 96 | |
| 97 | status_t VolumeBase::format() { |
| 98 | if (getState() != VolumeState::kUnmounted |
| 99 | || getState() != VolumeState::kCorrupt) { |
| 100 | SLOGE("Must be unmounted or corrupt to format %s", getId().c_str()); |
| 101 | return -EBUSY; |
| 102 | } |
| 103 | |
| 104 | setState(VolumeState::kFormatting); |
| 105 | status_t res = doFormat(); |
| 106 | setState(VolumeState::kUnmounted); |
| 107 | return res; |
| 108 | } |
| 109 | |
| 110 | status_t VolumeBase::doFormat() { |
| 111 | return -ENOTSUP; |
| 112 | } |
| 113 | |
| 114 | status_t VolumeBase::mountBind(const std::string& source, const std::string& target) { |
| 115 | if (::mount(source.c_str(), target.c_str(), "", MS_BIND, NULL)) { |
| 116 | SLOGE("Failed to bind mount %s to %s: %s", source.c_str(), |
| 117 | target.c_str(), strerror(errno)); |
| 118 | return -errno; |
| 119 | } |
| 120 | mBindTargets.push_back(target); |
| 121 | return OK; |
| 122 | } |
| 123 | |
| 124 | status_t VolumeBase::unmountBind(const std::string& target) { |
| 125 | ForceUnmount(target); |
| 126 | mBindTargets.remove(target); |
| 127 | return OK; |
| 128 | } |
| 129 | |
| 130 | } // namespace vold |
| 131 | } // namespace android |