[ANNOUNCE] [PATCHES] Advanced TCA Hotswap Support in Linux Kernel

Steven Dake
2002-10-14T18:33:56Z

lkml,

http://www.sourceforge.net/project/showfiles.php?group_id=64580

I am announcing a sourceforge project for developing support in Linux
kernel for Advanced TCA (PICMG 3.0) architecture. Advanced TCA is a
technology where boards exist in a chassis and can either be processor
nodes or storage nodes. All boards in the chassis are connected by
FibreChannel and Ethernet. The blades can be hot added or hot removed
while the Linux processor nodes are active, meaning, that the SCSI
subsystem must add devices on insertion request and remove devices on
ejection requests. Further the typical /dev/sda naming of devices is
not appropriate since device nodes can change depending on the insertion
order of disks.

These patches are for Linux 2.4.19 and work with the Qlogic 2300
FibreChannel driver and at this point mostly support hotswap of the disk
subsystem.

The patches consist of a SCSI hotswap patch for 2.4 kernel and QLA 2300
support.

The patches also consist of a GA Mapper library which maps fibrechannel
WWNs to devices in devfs filesystems such as /dev/scsi/chassis/slot/disc.

The sourceforge project also contains a userland library for each patch
and userland applications such that these operations can be scripted.

Advanced TCA uses IPMI, so this project will use the IPMI driver being
developed by Corey Minyard.

To be posted are userland or kernel hotswap managers. I've not decided
how to do this yet, so I'll post the bits when they are done.

I welcome comments questions or code to be added to the sourceforge project.

Thanks,
-steve