Re: Request for review of Linux iSCSI driver version 4.0.0.1

['Christoph Hellwig' <hch@infradead.org>]

On Tue, Nov 11, 2003 at 05:26:36PM +0530, Naveen Burmi wrote:
> During shutdown iSCSI driver gets signal to stop itself. In turn iSCSI driver 
> umounts all the partitions present of iSCSI disks, makes all the iSCSI disks 
> unavailble to the system and gracefully terminate. 
> But if iSCSI disk contains the root partition OR is part of root partition 
> then iSCSI driver must not try to umount the root partition and the iSCSI 
> disks must be available until the buffer cache gets flushed properly. For 
> this to happen iSCSI driver must be aware of all the iSCSI disk(s) that 
> constitute the root partition/devices.

I think you'd rather want a reboot notifier for after the final sync..

> 	Q. What kernel data structures/API's are available that provide the 
> information about root device(s)?

there is no such information.  you can only know the root device of a
particular process and that information is not available to drivers.

> > that instead of creating such bogus hacks.  A driver has no business
> > dealing with the network configuration.
> 
> During shutdown iSCSI driver must bring up the network interface, if it goes 
> down, so to make available the iSCSI disk(s) on which the root partition 
> exists. iscsi_set_if_addr is used to bring up the newtwork interface at the 
> time of shutdown. 

you don't need to shut down interfaces on system shutdown.

> Q. Is ip autoconfig code helps us to bring up the newtwork interface at the 
> time of shutdown?

no.