Re: [PATCH 0/2] scsi_transport_fc: LUN masking

[Hannes Reinecke <hare@suse.de>]

On 11/11/2015 11:34 AM, Hannes Reinecke wrote:
> Hi all,
> 
> having been subjected to the pain of trying to bootstrap a really
> large machine with systemd I decided to implement LUN masking in
> scsi_transport_fc.
> The principle is simple: disallow the automated LUN scanning when
> discovering a rport, and create udev rules which selectively
> enable individual LUNs by echoing the relevant values in the 'scan'
> attribute of the SCSI host.
> With that I'm able to boot an arbitrary large machine without
> running into any udev or systemd imposed timeout.
> To _disable_ LUN masking and restoring the original behaviour
> I've noticed that the 'scan' sysfs attribute is actually synchronous,
> ie the calling process will be blocked until the entire LUN scan
> is completed.
> So I've added another module parameter 'async_user_scan' to
> move the scanning onto the existing scan workqueue, and unblock
> the calling process.
> 
> As usual, comments and reviews are welcome.
> 
> Hannes Reinecke (2):
>   scsi_transport_fc: implement 'disable_target_scan' module parameter
>   scsi_transport_fc: Implement 'async_user_scan' module parameter
> 
>  drivers/scsi/scsi_transport_fc.c | 47 +++++++++++++++++++++++++++++++++++++---
>  1 file changed, 44 insertions(+), 3 deletions(-)
> 
Hmm. this seemed to have fallen through

-- 
Dr. Hannes Reinecke		   Teamlead Storage & Networking
hare@suse.de			               +49 911 74053 688
SUSE LINUX GmbH, Maxfeldstr. 5, 90409 Nürnberg
GF: F. Imendörffer, J. Smithard, J. Guild, D. Upmanyu, G. Norton
HRB 21284 (AG Nürnberg)
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