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[SCSI] osd_uld: Bump MAX_OSD_DEVICES from 64 to 1,048,576 

It used to be that minors where 8 bit. But now they
are actually 20 bit. So the fix is simplicity itself.

I've tested with 300 devices and all user-mode utils
work just fine. I have also mechanically added 10,000
to the ida (so devices are /dev/osd10000, /dev/osd10001 ...)
and was able to mkfs an exofs filesystem and access osds
from user-mode.

All the open-osd user-mode code uses the same library
to access devices through their symbolic names in
/dev/osdX so I'd say it's pretty safe. (Well tested)

This patch is very important because some of the systems
that will be deploying the 3.2 pnfs-objects code are larger
than 64 OSDs and will stop to work properly when reaching
that number.

CC: Stable <stable@vger.kernel.org>
Signed-off-by: Boaz Harrosh <bharrosh@panasas.com>
Signed-off-by: James Bottomley <JBottomley@Parallels.com>
hifive-unleashed-5.1
Boaz Harrosh 2012-01-25 21:42:58 +02:00 committed by James Bottomley
parent b52b80023f
commit 41f8ad7636
1 changed files with 2 additions and 2 deletions
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4
drivers/scsi/osd/osd_uld.c
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@ -69,10 +69,10 @@
#ifndef SCSI_OSD_MAJOR
# define SCSI_OSD_MAJOR 260
#endif
#define SCSI_OSD_MAX_MINOR 64
#define SCSI_OSD_MAX_MINOR MINORMASK
static const char osd_name[] = "osd";
static const char *osd_version_string = "open-osd 0.2.0";
static const char *osd_version_string = "open-osd 0.2.1";
MODULE_AUTHOR("Boaz Harrosh <bharrosh@panasas.com>");
MODULE_DESCRIPTION("open-osd Upper-Layer-Driver osd.ko");