Why does your LLD need to reach up into the block layer to find an i/o ?
Even if you are using tags as an index into something... I would think that
having to go up to the blk layer to retrieve a something that should have
already been known lower in the driver leaves room for race conditions.
-- james s
David C Somayajulu wrote:
This is another resubmission of qla4xxx driver for QLogic Corporation's iSCSI HBAs.
The main changes from the previous submission are
- use block layer tagging
- clean up code and remove unused function for firmware pass thru
Please not that this patch is dependant on the previously posted patch titled
[RFC] [PATCH] helper function for retrieving scsi_cmd given host based block layer tag
( http://marc.theaimsgroup.com/?l=linux-scsi&m=115871027627964&w=2 )
The complete mega patch for the driver is at
ftp://ftp.qlogic.com/outgoing/linux/iSCSI/upstream/5.00.05b10-k/0000-Initial-Commit-qla4xxx.txt
For ease of comprehension the above patch has been broken down into
the following smaller patches:
(located at ftp://ftp.qlogic.com/outgoing/linux/iSCSI/upstream/5.00.05b10-k/ )
0001-qla4xxx-driver-defs.diff
0002-qla4xxx-driver-init.diff
0003-qla4xxx-driver-os.diff
0004-qla4xxx-driver-isr.diff
0005-qla4xxx-driver-mbx.diff
0006-qla4xxx-driver-support.diff
0007-qla4xxx-driver-version.diff
All patches are against scsi-misc-2.6.git
Other items which needs to be done are
- Add support for sysfs attributes.
- Userspace support for session creation/deletion for iscsi HBAs.
- Add support for other discovery modes ie iSNS/SLP.
Here are the links to the previous two submissions
http://marc.theaimsgroup.com/?l=linux-scsi&m=115532714515853&w=2
http://groups.google.com/group/open-iscsi/browse_frm/thread/536ce2edf9a60c48?hl=en
I believe block layer tagging was the gating item in the last submission.
I would really appreciate if it can be merged upstream.
Regards,
David Somayajulu
Qlogic Corporation.
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