- Emergency shutdown just marks the fs as clean while leaving fs
in the middle of any state. Do not use it anymore.
- Changed android_reboot to set sys.powerctl property so that
all shutdown can be done by init.
- Normal reboot sequence changed to
1. Terminate processes (give time to clean up). And wait for
completion based on ro.build.shutdown_timeout.
Default value (when not set) is changed to 3 secs. If it is 0, do not
terminate processes.
2. Kill all remaining services except critical services for shutdown.
3. Shutdown vold using "vdc volume shutdown"
4. umount all emulated partitions. If it fails, just detach.
Wait in step 5 can handle it.
5. Try umounting R/W block devices for up to max timeout.
If it fails, try DETACH.
If umount fails to complete before reboot, it can be detected when
system reboots.
6. Reboot
- Log shutdown time and umount stat to log so that it can be collected after reboot
- To umount emulated partitions, all pending writes inside kernel should
be completed.
- To umount /data partition, all emulated partitions on top of /data should
be umounted and all pending writes should be completed.
- umount retry will only wait up to timeout. If there are too many pending
writes, reboot will discard them and e2fsck after reboot will fix any file system
issues.
bug: 36004738
bug: 32246772
Test: many reboots combining reboot from UI and adb reboot. Check last_kmsg and
fs_stat after reboot.
Change-Id: I6e74d6c68a21e76e08cc0438573d1586fd9aaee2
Save a string identifying the reason for last Android reboot or power
off in file /data/misc/recovery/last_reboot_reason . This file may
be used for informing users of reboot or shutdown reasons at next
boot, and for other diagnostic purposes.
Bug: 30994946
Test: Manual: reboot, setprop sys.powerctl
Change-Id: I01e44473fdd21b33e9e4dced77aba9a66b6d3755
Add ANDROID_RB_THERMOFF command to android_reboot(), denoting a power
off due to thermal limits exceeded. When this command is used, Android
may provide notification to the user about the potentially unexpected
power off at next boot.
Bug: 30994946
Test: Manual: setprop sys.powerctl thermal-shutdown
Change-Id: If2cde1b6a3c281a5750b50295412a4801ed5b2f2
and run fsck with -f on clean shutdown instead.
With -f, fsck.f2fs always performs a full scan of the /data
partition regardless of whether the partition is clean or not.
The full scan takes more than 2 seconds on volantis-userdebug
and delays the OS boot.
With -a, the command does almost nothing when the partition
is clean and finishes within 20-30ms on volantis-userdebug.
When the partition has an error or its check point has
CP_FSCK_FLAG (aka "need_fsck"), the command does exactly the
same full scan as -f to fix it.
Bug: 21853106
Change-Id: I126263caf34c0f5bb8f5e6794454d4e72526ce38
In some condition, some of FS would set disable_roll_forward option.
In this case, when we do power off or reboot, the power down progress
would stuck at android_reboot for 360 sec.
The reason is, remount_ro_done function check key word "rw" to determine
whether all the read-write FS has been remounted as read-only FS.
Unfortunately, it takes disable_roll_forward as a rw flag too by
mistake, so the check would always fail, until reach 360 sec threshold.
The patch would match "rw," from mount options, this can avoid the issue
successfully.
Change-Id: I409f9dc88c9ee5cf049615ea9dcccaf195b6bc5a
Signed-off-by: Hong-Mei Li <a21834@motorola.com>
__reboot is hidden for 64-bits and should be hidden on others
Change-Id: Ib6435269aac7fa726e49cc02f8f76d2be2875bc6
Signed-off-by: Pavel Chupin <pavel.v.chupin@intel.com>
Move the responsibility for rebooting the system from the
reboot command to init. Init is in a better position to take
actions to bring the system down cleanly, including making sure
filesystems are mounted read-only.
The only UIDs which can perform an init triggered reboot are
root, system, and shell.
Modify the reboot command so that it calls into init to perform
the reboot. The reboot command no longer requires CAP_SYS_BOOT.
Remove the -n reboot option and code which supports it. Anyone needing
to do an unclean shutdown can just do a 'echo c > /proc/sysrq-trigger'.
Modify adb so that it calls into init to perform a shutdown.
Bug: 8646621
Change-Id: I84c0513acb549720cb0e8c9fcbda0050f5c396f5
Ext4 filesystems like to be unmounted before rebooting. The Android system
doesn't have a traditional Linux init setup, and shutting down the system
was not much more than calling sync(2) and reboot(2). This adds a new
function to libcutils called android_reboot(). By default, it calls sync()
and then remounts all writable filesystems as read-only and marks them clean.
There is a flag parameter in which the caller can ask for sync() not to be
called, or to not remount the filesystems as read-only. Then it will call
reboot(2) as directed by the other parameters. This change also updates
adb, init and toolbox to call the new android_reboot() function.
Fixes bugs 3350709 and 3495575.
Change-Id: I16d71ffce3134310d7a260f61ec6f4dd204124a7
Keun-young Park