{"id":254653,"date":"2014-05-16T11:12:42","date_gmt":"2014-05-16T03:12:42","guid":{"rendered":"http:\/\/blog.zhenglei.net\/?p=254653"},"modified":"2014-05-16T11:12:42","modified_gmt":"2014-05-16T03:12:42","slug":"android-mount-sdcard-again","status":"publish","type":"post","link":"https:\/\/blog.zhenglei.net\/?p=254653","title":{"rendered":"Android mount sdcard (again)"},"content":{"rendered":"
\n

===>\u00a0 execute_media_format
\nandroid\/packages\/apps\/Settings\/src\/com\/android\/settings\/MediaFormat.java<\/p>\n

===>\u00a0 mountService.formatVolume(extStoragePath);
\nandroid\/frameworks\/base\/core\/java\/com\/android\/internal\/os\/storage\/ExternalStorageFormatter.java<\/p>\n

====>\u00a0 formatVolume
\n====>\u00a0 doFormatVolume
\nandroid\/frameworks\/base\/services\/java\/com\/android\/server\/MountService.java<\/p>\n

===> int CommandListener::VolumeCmd::runCommand
\n===> rc = vm->formatVolume(argv[2]);
\nandroid\/system\/vold\/CommandListener.cpp<\/p>\n

==> int VolumeManager::formatVolume
\n==> mVolumes = new VolumeCollection();
\n==> return v->formatVol()
\nandroid\/system\/vold\/VolumeManager.h
\nandroid\/system\/vold\/VolumeManager.cpp<\/p>\n

===> int Volume::formatVol
\n===> Fat::format(devicePath, 0))
\nandroid\/system\/vold\/Volume.cpp<\/p>\n

===> int Fat::format(const char *fsPath, unsigned int numSectors)
\n===> static char MKDOSFS_PATH[] = \u201c\/system\/bin\/newfs_msdos\u201d
\nandroid\/system\/vold\/Fat.cpp<\/p>\n

android\/frameworks\/base\/services\/java\/com\/android\/server\/NativeDaemonConnector.java<\/p>\n

# C code
\nandroid\/system\/vold<\/p>\n

# Launch sd formater in setting
\nadb shell
\nam start -n com.android.settings\/.MediaFormat<\/p>\n

##############################################################################<\/p>\n

\u4ee5\u4e0b\u662f\u6253\u5f00\u201c\u65e0\u7ebf\u548c\u7f51\u7edc\u8bbe\u7f6e\u201d\u754c\u9762\uff1a<\/p>\n

Intent intent = new Intent(\u201c\/\u201d);
\nComponentName cm = new ComponentName(\u201ccom.android.settings\u201d,\u201dcom.android.settings.WirelessSettings\u201d);
\nintent.setComponent(cm);
\nintent.setAction(\u201candroid.intent.action.VIEW\u201d);
\nactivity.startActivityForResult( intent , 0);<\/p>\n

\u4ee5\u4e0b\u662f\u53ef\u4ee5\u76f4\u63a5\u6253\u5f00\u7684\u7cfb\u7edf\u754c\u9762\uff1a<\/p>\n

com.android.settings.AccessibilitySettings \u8f85\u52a9\u529f\u80fd\u8bbe\u7f6e
\ncom.android.settings.ActivityPicker \u9009\u62e9\u6d3b\u52a8
\ncom.android.settings.ApnSettings APN\u8bbe\u7f6e
\ncom.android.settings.ApplicationSettings \u5e94\u7528\u7a0b\u5e8f\u8bbe\u7f6e
\ncom.android.settings.BandMode \u8bbe\u7f6eGSM\/UMTS\u6ce2\u6bb5
\ncom.android.settings.BatteryInfo \u7535\u6c60\u4fe1\u606f
\ncom.android.settings.DateTimeSettings \u65e5\u671f\u548c\u65f6\u95f4\u8bbe\u7f6e
\ncom.android.settings.DateTimeSettingsSetupWizard \u65e5\u671f\u548c\u65f6\u95f4\u8bbe\u7f6e
\ncom.android.settings.DevelopmentSettings \u5e94\u7528\u7a0b\u5e8f\u8bbe\u7f6e=\u300b\u5f00\u53d1\u8bbe\u7f6e
\ncom.android.settings.DeviceAdminSettings \u8bbe\u5907\u7ba1\u7406\u5668
\ncom.android.settings.DeviceInfoSettings \u5173\u4e8e\u624b\u673a
\ncom.android.settings.Display \u663e\u793a\u2014\u2014\u8bbe\u7f6e\u663e\u793a\u5b57\u4f53\u5927\u5c0f\u53ca\u9884\u89c8
\ncom.android.settings.DisplaySettings \u663e\u793a\u8bbe\u7f6e
\ncom.android.settings.DockSettings \u5e95\u5ea7\u8bbe\u7f6e
\ncom.android.settings.IccLockSettings SIM\u5361\u9501\u5b9a\u8bbe\u7f6e
\ncom.android.settings.InstalledAppDetails \u8bed\u8a00\u548c\u952e\u76d8\u8bbe\u7f6e
\ncom.android.settings.LanguageSettings \u8bed\u8a00\u548c\u952e\u76d8\u8bbe\u7f6e
\ncom.android.settings.LocalePicker \u9009\u62e9\u624b\u673a\u8bed\u8a00
\ncom.android.settings.LocalePickerInSetupWizard \u9009\u62e9\u624b\u673a\u8bed\u8a00
\ncom.android.settings.ManageApplications \u5df2\u4e0b\u8f7d\uff08\u5b89\u88c5\uff09\u8f6f\u4ef6\u5217\u8868
\ncom.android.settings.MasterClear \u6062\u590d\u51fa\u5382\u8bbe\u7f6e
\ncom.android.settings.MediaFormat \u683c\u5f0f\u5316\u624b\u673a\u95ea\u5b58
\ncom.android.settings.PhysicalKeyboardSettings \u8bbe\u7f6e\u952e\u76d8
\ncom.android.settings.PrivacySettings \u9690\u79c1\u8bbe\u7f6e
\ncom.android.settings.ProxySelector \u4ee3\u7406\u8bbe\u7f6e
\ncom.android.settings.RadioInfo \u624b\u673a\u4fe1\u606f
\ncom.android.settings.RunningServices \u6b63\u5728\u8fd0\u884c\u7684\u7a0b\u5e8f\uff08\u670d\u52a1\uff09
\ncom.android.settings.SecuritySettings \u4f4d\u7f6e\u548c\u5b89\u5168\u8bbe\u7f6e
\ncom.android.settings.Settings \u7cfb\u7edf\u8bbe\u7f6e
\ncom.android.settings.SettingsSafetyLegalActivity \u5b89\u5168\u4fe1\u606f
\ncom.android.settings.SoundSettings \u58f0\u97f3\u8bbe\u7f6e
\ncom.android.settings.TestingSettings \u6d4b\u8bd5\u2014\u2014\u663e\u793a\u624b\u673a\u4fe1\u606f\u3001\u7535\u6c60\u4fe1\u606f\u3001\u4f7f\u7528\u60c5\u51b5\u7edf\u8ba1\u3001Wifi information\u3001\u670d\u52a1\u4fe1\u606f
\ncom.android.settings.TetherSettings \u7ed1\u5b9a\u4e0e\u4fbf\u643a\u5f0f\u70ed\u70b9
\ncom.android.settings.TextToSpeechSettings \u6587\u5b57\u8f6c\u8bed\u97f3\u8bbe\u7f6e
\ncom.android.settings.UsageStats \u4f7f\u7528\u60c5\u51b5\u7edf\u8ba1
\ncom.android.settings.UserDictionarySettings \u7528\u6237\u8bcd\u5178
\ncom.android.settings.VoiceInputOutputSettings \u8bed\u97f3\u8f93\u5165\u4e0e\u8f93\u51fa\u8bbe\u7f6e
\ncom.android.settings.WirelessSettings \u65e0\u7ebf\u548c\u7f51\u7edc\u8bbe\u7f6e<\/p>\n

##############################################################################
\nGenerate SD Card Image file<\/p>\n

#64G:
\ndd if=\/dev\/zero of=64G.img\u00a0 count=0 seek=128M<\/p>\n

#8G:
\ndd if=\/dev\/zero of=64G.img\u00a0 count=0 seek=16M<\/p>\n

#8G (with zero filled)
\ndd if=\/dev\/zero of=64G.img count=16M<\/p>\n

##############################################################################
\nLoop device<\/p>\n

#List loop devices:
\nlosetup -a<\/p>\n

#Add a loop device
\nlosetup \/dev\/loop1 8G_zero.img<\/p>\n

#Delete loop device
\nlosetup -d \/dev\/loop1<\/p>\n

find . -type f |xargs grep sd_format
\nfind . -name *.java |xargs grep sd_format<\/p>\n

###################################################################
\nModify sd_format of android\/packages\/apps\/Settings\/res\/values, impact on:<\/p>\n

target R.java\/Manifest.java: Settings (out\/target\/common\/obj\/APPS\/Settings_intermediates\/src\/R.stamp)
\ntarget Java: Settings (out\/target\/common\/obj\/APPS\/Settings_intermediates\/classes)
\nNote: Some input files use or override a deprecated API.
\nNote: Recompile with -Xlint:deprecation for details.
\nNote: Some input files use unchecked or unsafe operations.
\nNote: Recompile with -Xlint:unchecked for details.
\nCopying: out\/target\/common\/obj\/APPS\/Settings_intermediates\/classes-jarjar.jar
\nCopying: out\/target\/common\/obj\/APPS\/Settings_intermediates\/emma_out\/lib\/classes-jarjar.jar
\nCopying: out\/target\/common\/obj\/APPS\/Settings_intermediates\/classes.jar
\nCopying: out\/target\/common\/obj\/APPS\/Settings_intermediates\/noproguard.classes.jar
\ntarget Dex: Settings
\nCopying: out\/target\/common\/obj\/APPS\/Settings_intermediates\/noproguard.classes.dex
\ntarget Package: Settings (out\/target\/product\/generic\/obj\/APPS\/Settings_intermediates\/package.apk)
\n\u2018out\/target\/common\/obj\/APPS\/Settings_intermediates\/classes.dex\u2019 as \u2018classes.dex\u2019\u2026
\nProcessing target\/product\/generic\/obj\/APPS\/Settings_intermediates\/package.apk
\nDone!
\nInstall: out\/target\/product\/generic\/system\/app\/Settings.odex
\nInstall: out\/target\/product\/generic\/system\/app\/Settings.apk
\nFinding NOTICE files: out\/target\/product\/generic\/obj\/NOTICE_FILES\/hash-timestamp
\nCombining NOTICE files: out\/target\/product\/generic\/obj\/NOTICE.html
\ntarget Java: SettingsTests (out\/target\/common\/obj\/APPS\/SettingsTests_intermediates\/classes)
\nNote: Some input files use or override a deprecated API.
\nNote: Recompile with -Xlint:deprecation for details.
\nInstalled file list: out\/target\/product\/generic\/installed-files.txt
\nTarget system fs image: out\/target\/product\/generic\/obj\/PACKAGING\/systemimage_intermediates\/system.img
\nInstall system fs image: out\/target\/product\/generic\/system.img<\/p>\n

******************************************************
\nSD FORMAT<\/p>\n

==> StorageVolumePreferenceCategory
\n==> mAllowFormat = mStorageVolume != null && !mStorageVolume.isEmulated()
\nandroid\/packages\/apps\/Settings\/src\/com\/android\/settings\/deviceinfo\/StorageVolumePreferenceCategory.java<\/p>\n

SD Card Mount<\/p>\n

=> \u201cPreparing SD card\u201d
\n=> \u201cDamaged SD card\u201d
\n==> ext_media_checking_notification_title
\n==> ext_media_unmountable_notification_title
\nframeworks\/base\/core\/res\/res\/values\/strings.xml
\nframeworks\/base\/packages\/SystemUI\/src\/com\/android\/systemui\/usb\/StorageNotification.java
\n===>MEDIA_UNMOUNTABLE<\/p>\n

*****************************************************<\/p>\n

#\/system\/etc\/vold.fatab
\n#\/system\/etc\/vold.conf<\/p>\n

=>fatab
\n==>system\/vold\/main.cpp
\n===>process_config
\n====>VolumeManager
\n=====>system\/vold\/VolumeManager.cpp
\n=======>CommandListener
\n========>system\/vold\/CommandListener.cpp<\/p>\n

********************************
\nFAT
\n===> system\/vold\/Fat.cpp
\n====> FSCK_MSDOS_PATH
\n=====> Fat::check
\n======>system\/vold\/Volume.cpp
\n=======>createDeviceNode
\n=========>Volume::mountVol
\n=========>DirectVolume::handleBlockEvent<\/p>\n

Volume::mountVol
\n==> No impact on SDCard Mount, just for security fs<\/p>\n

DirectVolume::handleBlockEvent
\n==>NetlinkEvent
\n===>system\/core\/include\/sysutils\/NetlinkEvent.h
\n=====>NetlinkEvent.mSubsystem==\u201dblock\u201d, send to volume manage ==> DirectVolume::handleBlockEvent
\n======>NlActionAdd
\n========>system\/core\/libsysutils\/src\/NetlinkEvent.cpp<\/p>\n

==========>system\/core\/libsysutils\/src\/NetlinkListener.cpp
\n==========>NetlinkListener::onDataAvailable<\/p>\n

============>system\/core\/libsysutils\/src\/SocketListener.cpp
\n============>system\/core\/include\/sysutils\/NetlinkListener.h
\n============>class NetlinkListener : public SocketListener<\/p>\n

***************************************************************************************
\n*** Triger of\u00a0 NlActionAdd ***<\/p>\n

\u201cadd\u201d:
\n=>NetlinkEvent::parseAsciiNetlinkMessage,\u00a0\u00a0\u00a0 system\/core\/libsysutils\/src\/NetlinkEvent.cpp
\n==>NetlinkEvent::decode
\n===>NetlinkListener::onDataAvailable,\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 system\/core\/libsysutils\/src\/NetlinkListener.cpp
\n====>SocketListener::runListener,\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 system\/core\/libsysutils\/src\/SocketListener.cpp
\n=====>SocketListener::threadStart,\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 system\/core\/libsysutils\/src\/SocketListener.cpp
\n======>SocketListener::startListener,\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 system\/core\/libsysutils\/src\/SocketListener.cpp
\n=======>main,\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 system\/vold\/main.cpp
\n=======>NetlinkHandler::start,\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 system\/vold\/NetlinkHandler.cpp<\/p>\n

*** Handle of NlActionAdd ***<\/p>\n

\u201cNlActionAdd\u201d
\n=>DirectVolume::handleBlockEvent,\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 system\/vold\/DirectVolume.cpp
\n==>VolumeManager::handleBlockEvent,\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 system\/vold\/VolumeManager.cpp
\n==>NetlinkHandler::onEvent,\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 system\/vold\/NetlinkHandler.cpp<\/p>\n

**************************************************************************
\nFramework:\u00a0\u00a0 MountService<\/p>\n

frameworks\/base\/services\/java\/com\/android\/server\/SystemServer.java
\n=>public MountService(Context context),\u00a0\u00a0\u00a0\u00a0 frameworks\/base\/services\/java\/com\/android\/server\/MountService.java
\n==>mContext.registerReceiver(mBroadcastReceiver, filter, null, null);
\n===>BroadcastReceiver mBroadcastReceiver = new BroadcastReceiver()
\n====>action.equals(Intent.ACTION_BOOT_COMPLETED)
\n=====>if (state.equals(Environment.MEDIA_UNMOUNTED)) {
\nint rc = doMountVolume(path);
\nif (rc != StorageResultCode.OperationSucceeded) {
\nSlog.e(TAG, String.format(\u201cBoot-time mount failed (%d)\u201d,
\nrc));
\n}
\n======>private int doMountVolume(String path)
\n=======>mConnector.doCommand(String.format(\u201cvolume mount %s\u201d, path));<\/p>\n

==>mConnector = new NativeDaemonConnector
\n===>class NativeDaemonConnector,\u00a0\u00a0\u00a0 frameworks\/base\/services\/java\/com\/android\/server\/NativeDaemonConnector
\n====>public void run(),\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 frameworks\/base\/services\/java\/com\/android\/server\/NativeDaemonConnector.java
\n=====>listenToSocket,\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 frameworks\/base\/services\/java\/com\/android\/server\/NativeDaemonConnector.java
\n======>mCallbacks.onDaemonConnected();\u00a0\u00a0\u00a0\u00a0 (mCallbacks=MountService)
\n=======>onDaemonConnected()\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 frameworks\/base\/services\/java\/com\/android\/server\/MountService.java<\/p>\n

**********************************************************************************
\nSd Card Mount Summary:<\/p>\n

frameworks\/base\/services\/java\/com\/android\/server\/MountService.java:
\nprivate int doMountVolume(String path):<\/p>\n

Use case of doMountVolume<\/p>\n

Case 1:\u00a0 private final BroadcastReceiver mBroadcastReceiver = new BroadcastReceiver()
\n===> Boot up SD Card mount<\/p>\n

Case 2:\u00a0 public boolean onEvent(int code, String raw, String[] cooked)
\n===>frameworks\/base\/services\/java\/com\/android\/server\/NativeDaemonConnector.java
\n===>Callback
\n===>public boolean handleMessage(Message msg)
\n===> SD Card Insert mount<\/p>\n

Case 3: public int mountVolume(String path)
\n==> packages\/apps\/Settings\/src\/com\/android\/settings\/deviceinfo\/Memory.java
\n==> User Setting\/Mount<\/p>\n

Case 4: public int mountVolume(String path)
\n===> frameworks\/base\/core\/java\/com\/android\/internal\/os\/storage\/ExternalStorageFormatter.java
\n===> Factory Reset<\/p>\n<\/div>\n","protected":false},"excerpt":{"rendered":"

===>\u00a0 execute_media_format android\/pa … \u7ee7\u7eed\u9605\u8bfb →<\/span><\/a><\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[5,2,18],"tags":[129],"class_list":["post-254653","post","type-post","status-publish","format-standard","hentry","category-android","category-linux","category-software-download","tag-sdcard"],"_links":{"self":[{"href":"https:\/\/blog.zhenglei.net\/index.php?rest_route=\/wp\/v2\/posts\/254653","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/blog.zhenglei.net\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/blog.zhenglei.net\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/blog.zhenglei.net\/index.php?rest_route=\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/blog.zhenglei.net\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=254653"}],"version-history":[{"count":1,"href":"https:\/\/blog.zhenglei.net\/index.php?rest_route=\/wp\/v2\/posts\/254653\/revisions"}],"predecessor-version":[{"id":254654,"href":"https:\/\/blog.zhenglei.net\/index.php?rest_route=\/wp\/v2\/posts\/254653\/revisions\/254654"}],"wp:attachment":[{"href":"https:\/\/blog.zhenglei.net\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=254653"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/blog.zhenglei.net\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=254653"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/blog.zhenglei.net\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=254653"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}