2 * Copyright (C) 2008 The Android Open Source Project
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
8 * http://www.apache.org/licenses/LICENSE-2.0
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.
17 #ifndef ANDROID_VOLD_VOLUME_MANAGER_H
18 #define ANDROID_VOLD_VOLUME_MANAGER_H
29 #include <unordered_map>
30 #include <unordered_set>
32 #include <cutils/multiuser.h>
33 #include <utils/List.h>
34 #include <utils/Timers.h>
35 #include <sysutils/SocketListener.h>
36 #include <sysutils/NetlinkEvent.h>
39 #include "DiskPartition.h"
40 #include "VolumeBase.h"
42 /* The length of an MD5 hash when encoded into ASCII hex characters */
43 #define MD5_ASCII_LENGTH_PLUS_NULL ((MD5_DIGEST_LENGTH*2)+1)
45 typedef enum { ASEC, OBB } container_type_t;
49 ContainerData(char* _id, container_type_t _type)
62 container_type_t type;
65 typedef android::List<ContainerData*> AsecIdCollection;
69 static const char *SEC_ASECDIR_EXT;
70 static const char *SEC_ASECDIR_INT;
71 static const char *ASECDIR;
72 static const char *LOOPDIR;
75 static VolumeManager *sInstance;
77 SocketListener *mBroadcaster;
79 AsecIdCollection *mActiveContainers;
82 // for adjusting /proc/sys/vm/dirty_ratio when UMS is active
88 virtual ~VolumeManager();
90 // TODO: pipe all requests through VM to avoid exposing this lock
91 std::mutex& getLock() { return mLock; }
96 void handleBlockEvent(NetlinkEvent *evt);
100 DiskSource(const std::string& sysPattern, const std::string& nickname, int partnum, int flags) :
101 mSysPattern(sysPattern), mNickname(nickname), mPartNum(partnum), mFlags(flags) {
104 bool matches(const std::string& sysPath) {
105 return !fnmatch(mSysPattern.c_str(), sysPath.c_str(), 0);
108 const std::string& getNickname() { return mNickname; }
109 int getPartNum() { return mPartNum; }
110 int getFlags() { return mFlags; }
113 std::string mSysPattern;
114 std::string mNickname;
119 void addDiskSource(const std::shared_ptr<DiskSource>& diskSource);
121 std::shared_ptr<android::vold::Disk> findDisk(const std::string& id);
122 std::shared_ptr<android::vold::VolumeBase> findVolume(const std::string& id);
124 void listVolumes(android::vold::VolumeBase::Type type, std::list<std::string>& list);
126 nsecs_t benchmarkPrivate(const std::string& id);
128 int forgetPartition(const std::string& partGuid);
130 int onUserAdded(userid_t userId, int userSerialNumber);
131 int onUserRemoved(userid_t userId);
132 int onUserStarted(userid_t userId);
133 int onUserStopped(userid_t userId);
135 int setPrimary(const std::shared_ptr<android::vold::VolumeBase>& vol);
137 int remountUid(uid_t uid, const std::string& mode);
139 /* Reset all internal state, typically during framework boot */
141 /* Prepare for device shutdown, safely unmounting all devices */
143 /* Unmount all volumes, usually for encryption */
147 int findAsec(const char *id, char *asecPath = NULL, size_t asecPathLen = 0,
148 const char **directory = NULL) const;
149 int createAsec(const char *id, unsigned long numSectors, const char *fstype,
150 const char *key, const int ownerUid, bool isExternal);
151 int resizeAsec(const char *id, unsigned long numSectors, const char *key);
152 int finalizeAsec(const char *id);
155 * Fixes ASEC permissions on a filesystem that has owners and permissions.
156 * This currently means EXT4-based ASEC containers.
158 * There is a single file that can be marked as "private" and will not have
159 * world-readable permission. The group for that file will be set to the gid
162 * Returns 0 on success.
164 int fixupAsecPermissions(const char *id, gid_t gid, const char* privateFilename);
165 int destroyAsec(const char *id, bool force);
166 int mountAsec(const char *id, const char *key, int ownerUid, bool readOnly);
167 int unmountAsec(const char *id, bool force);
168 int renameAsec(const char *id1, const char *id2);
169 int getAsecMountPath(const char *id, char *buffer, int maxlen);
170 int getAsecFilesystemPath(const char *id, char *buffer, int maxlen);
172 /* Loopback images */
173 int listMountedObbs(SocketClient* cli);
174 int mountObb(const char *fileName, const char *key, int ownerUid);
175 int unmountObb(const char *fileName, bool force);
176 int getObbMountPath(const char *id, char *buffer, int maxlen);
178 /* Shared between ASEC and Loopback images */
179 int unmountLoopImage(const char *containerId, const char *loopId,
180 const char *fileName, const char *mountPoint, bool force);
182 int updateVirtualDisk();
183 int setDebug(bool enable);
185 void setBroadcaster(SocketListener *sl) { mBroadcaster = sl; }
186 SocketListener *getBroadcaster() { return mBroadcaster; }
188 static VolumeManager *Instance();
190 static char *asecHash(const char *id, char *buffer, size_t len);
193 * Ensure that all directories along given path exist, creating parent
194 * directories as needed. Validates that given path is absolute and that
195 * it contains no relative "." or ".." paths or symlinks. Last path segment
196 * is treated as filename and ignored, unless the path ends with "/". Also
197 * ensures that path belongs to a volume managed by vold.
199 int mkdirs(char* path);
203 void readInitialState();
204 bool isMountpointMounted(const char *mp);
205 bool isAsecInDirectory(const char *dir, const char *asec) const;
206 bool isLegalAsecId(const char *id) const;
208 int linkPrimary(userid_t userId);
212 std::list<std::shared_ptr<DiskSource>> mDiskSources;
213 std::list<std::shared_ptr<android::vold::Disk>> mDisks;
215 std::unordered_map<userid_t, int> mAddedUsers;
216 std::unordered_set<userid_t> mStartedUsers;
218 std::string mVirtualDiskPath;
219 std::shared_ptr<android::vold::Disk> mVirtualDisk;
220 std::shared_ptr<android::vold::VolumeBase> mInternalEmulated;
221 std::shared_ptr<android::vold::VolumeBase> mPrimary;
225 #endif /* __cplusplus */
226 #define UNMOUNT_NOT_MOUNTED_ERR (-2)
227 int vold_unmountAll(void);