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[SCSI] Better log messages for PQ3 devs 

Some devices report a peripheral qualifier of 3 for LUN 0; with the original
code, we would still try a REPORT_LUNS scan (if SCSI level is >= 3 or if we
have the BLIST_REPORTLUNS2 passed in), but NOT any sequential scan.
Also, the device at LUN 0 (which is not connected according to the PQ) is not
registered with the OS.

Unfortunately, SANs exist that are SCSI-2 and do NOT support REPORT_LUNS, but
report a unknown device with PQ 3 on LUN 0. We still need to scan them, and
most probably we even need BLIST_SPARSELUN (and BLIST_LARGELUN). See the bug
reference for an infamous example.

This patch 2/3:
If a PQ3 device is found, log a message that describes the device
(INQUIRY DATA and C:B:T:U tuple) and make a suggestion for blacklisting
it.

Signed-off-by: Kurt Garloff <garloff@suse.de>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
This commit is contained in:
Kurt Garloff 2006-04-03 15:18:35 +02:00 committed by James Bottomley
parent 4186ab1973
commit 6c7154c97e
1 changed files with 35 additions and 3 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

38
drivers/scsi/scsi_scan.c
View File

@ -808,6 +808,29 @@ static inline void scsi_destroy_sdev(struct scsi_device *sdev)
put_device(&sdev->sdev_gendev);
}
/**
* scsi_inq_str - print INQUIRY data from min to max index,
* strip trailing whitespace
* @buf: Output buffer with at least end-first+1 bytes of space
* @inq: Inquiry buffer (input)
* @first: Offset of string into inq
* @end: Index after last character in inq
*/
static unsigned char* scsi_inq_str(unsigned char* buf, unsigned char *inq,
unsigned first, unsigned end)
{
unsigned term = 0, idx;
for (idx = 0; idx+first < end && idx+first < inq[4]+5; ++idx) {
if (inq[idx+first] > 0x20) {
buf[idx] = inq[idx+first];
term = idx+1;
} else {
buf[idx] = ' ';
}
}
buf[term] = 0;
return buf;
}
/**
* scsi_probe_and_add_lun - probe a LUN, if a LUN is found add it
@ -888,9 +911,18 @@ static int scsi_probe_and_add_lun(struct scsi_target *starget,
* logical disk configured at sdev->lun, but there
* is a target id responding.
*/
SCSI_LOG_SCAN_BUS(3, printk(KERN_INFO
"scsi scan: peripheral qualifier of 3,"
" no device added\n"));
SCSI_LOG_SCAN_BUS(2, sdev_printk(KERN_INFO, sdev, "scsi scan:"
" peripheral qualifier of 3, device not"
" added\n"))
if (lun == 0) {
unsigned char vend[9], mod[17];
SCSI_LOG_SCAN_BUS(1, sdev_printk(KERN_INFO, sdev,
"scsi scan: consider passing scsi_mod."
"dev_flags=%s:%s:0x240 or 0x800240\n",
scsi_inq_str(vend, result, 8, 16),
scsi_inq_str(mod, result, 16, 32)));
}
res = SCSI_SCAN_TARGET_PRESENT;
goto out_free_result;
}