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,
101 int partnum, int flags,
102 const std::string& fstype, const std::string mntopts) :
103 mSysPattern(sysPattern), mNickname(nickname),
104 mPartNum(partnum), mFlags(flags),
105 mFsType(fstype), mMntOpts(mntopts) {
108 bool matches(const std::string& sysPath) {
109 return !fnmatch(mSysPattern.c_str(), sysPath.c_str(), 0);
112 const std::string& getNickname() { return mNickname; }
113 int getPartNum() { return mPartNum; }
114 int getFlags() { return mFlags; }
115 const std::string& getFsType() { return mFsType; }
116 const std::string& getMntOpts() { return mMntOpts; }
119 std::string mSysPattern;
120 std::string mNickname;
124 std::string mMntOpts;
127 void addDiskSource(const std::shared_ptr<DiskSource>& diskSource);
129 std::shared_ptr<android::vold::Disk> findDisk(const std::string& id);
130 std::shared_ptr<android::vold::VolumeBase> findVolume(const std::string& id);
132 void listVolumes(android::vold::VolumeBase::Type type, std::list<std::string>& list);
134 nsecs_t benchmarkPrivate(const std::string& id);
136 int forgetPartition(const std::string& partGuid);
138 int onUserAdded(userid_t userId, int userSerialNumber);
139 int onUserRemoved(userid_t userId);
140 int onUserStarted(userid_t userId);
141 int onUserStopped(userid_t userId);
143 int setPrimary(const std::shared_ptr<android::vold::VolumeBase>& vol);
145 int remountUid(uid_t uid, const std::string& mode);
147 /* Reset all internal state, typically during framework boot */
149 /* Prepare for device shutdown, safely unmounting all devices */
151 /* Unmount all volumes, usually for encryption */
155 int findAsec(const char *id, char *asecPath = NULL, size_t asecPathLen = 0,
156 const char **directory = NULL) const;
157 int createAsec(const char *id, unsigned long numSectors, const char *fstype,
158 const char *key, const int ownerUid, bool isExternal);
159 int resizeAsec(const char *id, unsigned long numSectors, const char *key);
160 int finalizeAsec(const char *id);
163 * Fixes ASEC permissions on a filesystem that has owners and permissions.
164 * This currently means EXT4-based ASEC containers.
166 * There is a single file that can be marked as "private" and will not have
167 * world-readable permission. The group for that file will be set to the gid
170 * Returns 0 on success.
172 int fixupAsecPermissions(const char *id, gid_t gid, const char* privateFilename);
173 int destroyAsec(const char *id, bool force);
174 int mountAsec(const char *id, const char *key, int ownerUid, bool readOnly);
175 int unmountAsec(const char *id, bool force);
176 int renameAsec(const char *id1, const char *id2);
177 int getAsecMountPath(const char *id, char *buffer, int maxlen);
178 int getAsecFilesystemPath(const char *id, char *buffer, int maxlen);
180 /* Loopback images */
181 int listMountedObbs(SocketClient* cli);
182 int mountObb(const char *fileName, const char *key, int ownerUid);
183 int unmountObb(const char *fileName, bool force);
184 int getObbMountPath(const char *id, char *buffer, int maxlen);
186 /* Shared between ASEC and Loopback images */
187 int unmountLoopImage(const char *containerId, const char *loopId,
188 const char *fileName, const char *mountPoint, bool force);
190 int updateVirtualDisk();
191 int setDebug(bool enable);
193 void setBroadcaster(SocketListener *sl) { mBroadcaster = sl; }
194 SocketListener *getBroadcaster() { return mBroadcaster; }
196 static VolumeManager *Instance();
198 static char *asecHash(const char *id, char *buffer, size_t len);
201 * Ensure that all directories along given path exist, creating parent
202 * directories as needed. Validates that given path is absolute and that
203 * it contains no relative "." or ".." paths or symlinks. Last path segment
204 * is treated as filename and ignored, unless the path ends with "/". Also
205 * ensures that path belongs to a volume managed by vold.
207 int mkdirs(char* path);
211 void readInitialState();
212 bool isMountpointMounted(const char *mp);
213 bool isAsecInDirectory(const char *dir, const char *asec) const;
214 bool isLegalAsecId(const char *id) const;
216 int linkPrimary(userid_t userId);
220 std::list<std::shared_ptr<DiskSource>> mDiskSources;
221 std::list<std::shared_ptr<android::vold::Disk>> mDisks;
223 std::unordered_map<userid_t, int> mAddedUsers;
224 std::unordered_set<userid_t> mStartedUsers;
226 std::string mVirtualDiskPath;
227 std::shared_ptr<android::vold::Disk> mVirtualDisk;
228 std::shared_ptr<android::vold::VolumeBase> mInternalEmulated;
229 std::shared_ptr<android::vold::VolumeBase> mPrimary;
233 #endif /* __cplusplus */
234 #define UNMOUNT_NOT_MOUNTED_ERR (-2)
235 int vold_unmountAll(void);