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[SCSI] BLIST_ATTACH_PQ3 flags

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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 is patch 3/3:
3. Implement the blacklist flag BLIST_ATTACH_PQ3 that makes the scsi
   scanning code register PQ3 devices and continues scanning; only sg
   will attach thanks to scsi_bus_match().

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 15:20:08 +02:00 committed by James Bottomley
parent 6c7154c97e
commit 13f7e5acc8
3 changed files with 4 additions and 1 deletions
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2
drivers/scsi/scsi_devinfo.c
View File

@ -155,6 +155,8 @@ static struct {
{"HITACHI", "DF400", "*", BLIST_SPARSELUN},
{"HITACHI", "DF500", "*", BLIST_SPARSELUN},
{"HITACHI", "DF600", "*", BLIST_SPARSELUN},
{"HITACHI", "DISK-SUBSYSTEM", "*", BLIST_ATTACH_PQ3 | BLIST_SPARSELUN | BLIST_LARGELUN},
{"HITACHI", "OPEN-E", "*", BLIST_ATTACH_PQ3 | BLIST_SPARSELUN | BLIST_LARGELUN},
{"HP", "A6189A", NULL, BLIST_SPARSELUN | BLIST_LARGELUN}, /* HP VA7400 */
{"HP", "OPEN-", "*", BLIST_SPARSELUN | BLIST_LARGELUN}, /* HP XP Arrays */
{"HP", "NetRAID-4M", NULL, BLIST_FORCELUN},

2
drivers/scsi/scsi_scan.c
View File

@ -900,7 +900,7 @@ static int scsi_probe_and_add_lun(struct scsi_target *starget,
/*
* result contains valid SCSI INQUIRY data.
*/
if ((result[0] >> 5) == 3) {
if (((result[0] >> 5) == 3) && !(bflags & BLIST_ATTACH_PQ3)) {
/*
* For a Peripheral qualifier 3 (011b), the SCSI
* spec says: The device server is not capable of

1
include/scsi/scsi_devinfo.h
View File

@ -28,4 +28,5 @@
#define BLIST_NO_ULD_ATTACH 0x100000 /* device is actually for RAID config */
#define BLIST_SELECT_NO_ATN 0x200000 /* select without ATN */
#define BLIST_RETRY_HWERROR 0x400000 /* retry HARDWARE_ERROR */
#define BLIST_ATTACH_PQ3 0x800000 /* Scan: Attach to PQ3 devices */
#endif