Merge lp://qastaging/~csurbhi/upstart/upstart-add-pivot-handling into lp://qastaging/upstart
| Status: | Work in progress |
|---|---|
| Proposed branch: | lp://qastaging/~csurbhi/upstart/upstart-add-pivot-handling |
| Merge into: | lp://qastaging/upstart |
| Diff against target: |
1254 lines (+972/-15) 12 files modified
dbus/com.ubuntu.Upstart.xml (+7/-1) init/Makefile.am (+12/-11) init/conf.c (+35/-0) init/conf.h (+1/-0) init/control.c (+35/-0) init/control.h (+3/-0) init/events.h (+8/-1) init/paths.h (+8/-0) init/pivot.c (+616/-0) init/pivot.h (+66/-0) init/tests/test_control.c (+106/-1) util/initctl.c (+75/-1) |
| To merge this branch: | bzr merge lp://qastaging/~csurbhi/upstart/upstart-add-pivot-handling |
| Related bugs: |
| Reviewer | Review Type | Date Requested | Status |
|---|---|---|---|
| Scott James Remnant | Pending | ||
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Review via email:
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Description of the change
The pivot command is used for changing the root filesystem in the initramfs from the memory based "/" to the disk based real root filesystem. This command can be issued as follows:
initctl pivot <ROOTFS> <INIT>
where ROOTFS is the root filesystem that we want to move to while in the initramfs. INIT is the first program that we wish to execute once this move to the real root filesystem is made.
This command is intended to be used when upstart is executed in initramfs for making the initramfs event driven.
It is assumed that a user can specify a different ROOTFS, INIT or arguments to this new INIT at the grub command prompt. The console used for logging the messages is /dev/console and is a not a boot argument which can be changed.
This command has no effect when it is executed from a non memory based root filesystem.
This change shall enable upstart to be used as init in the initramfs for making the initramfs event driven. Please do let me know your thoughts on this change.
Thanks!
Unmerged revisions
- 1318. By Surbhi Palande
-
One more typo fix
- 1317. By Surbhi Palande
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Some cleanup related fixes. Expecting one or two more!
- 1316. By Surbhi Palande
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Initial support to handle a new initctl command: pivot.
Usage: initctl pivot <ROOTFS> <INIT>" "<args>"This command can be used to change the root filesystem from a initramfs
based rootfs to the new requested <ROOTFS>. On successfully changing the root
filesystem the new <INIT> shall be executed. On failure in handling this
command a pivot-failed event is emitted. This command works as intended
only when fired from initramfs. When fired from any other filesystem, this
command has no effect other than the emission of the "pivot-failed" event.
