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From: "Ewan D. Milne" <emilne@redhat.com>
To: linux-scsi@vger.kernel.org
Subject: [PATCH RFC 3/9] [SCSI] Add a kernel config option for enhanced Unit Attention support
Date: Fri, 18 Jan 2013 11:27:08 -0500	[thread overview]
Message-ID: <1358526434-1173-4-git-send-email-emilne@redhat.com> (raw)
In-Reply-To: <1358526434-1173-1-git-send-email-emilne@redhat.com>

From: "Ewan D. Milne" <emilne@redhat.com>

Added CONFIG_SCSI_ENHANCED_UA kernel config option to enable changes
in the SCSI mid-layer which detect and report certain Unit Attention
conditions reported by devices.  These changes are primarily useful
when storage arrays that can be reconfigured are being used, so the
config option would normally not be used unless it was needed.

Signed-off-by: Ewan D. Milne <emilne@redhat.com>
---
 drivers/scsi/Kconfig | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/drivers/scsi/Kconfig b/drivers/scsi/Kconfig
index e955978..52836e7 100644
--- a/drivers/scsi/Kconfig
+++ b/drivers/scsi/Kconfig
@@ -280,6 +280,18 @@ config SCSI_WAIT_SCAN
 # disabling it, whereas people who accidentally switch it off may wonder why
 # their mkinitrd gets into trouble.
 
+config SCSI_ENHANCED_UA
+       bool "Enhanced SCSI Unit Attention handling"
+       depends on SCSI
+       help
+	 Certain SCSI devices report changes via a UNIT ATTENTION code.
+	 (For example, the addition or removal of LUNs from a target, or
+	 changing the number of logical blocks on a a LUN.)  This option
+	 enables reporting of these changes via udev events, so that the
+	 device can be rescanned to find out what has changed.  This is
+	 primarily useful when storage arrays that can be reconfigured
+	 are attached to the system, otherwise you can say N here.
+
 menu "SCSI Transports"
 	depends on SCSI
 
-- 
1.7.11.7


  parent reply	other threads:[~2013-01-18 16:27 UTC|newest]

Thread overview: 49+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2013-01-18 16:27 [PATCH RFC 0/9] [SCSI] Enhanced sense and Unit Attention handling Ewan D. Milne
2013-01-18 16:27 ` [PATCH RFC 1/9] [SCSI] Detect overflow of sense data buffer Ewan D. Milne
2013-01-18 16:46   ` James Bottomley
2013-01-21  7:26     ` Hannes Reinecke
2013-01-21  8:58       ` James Bottomley
2013-01-21 17:42       ` Douglas Gilbert
2013-01-22 15:10       ` Ewan Milne
2013-01-23  7:16         ` Hannes Reinecke
2013-01-22 15:08     ` Ewan Milne
2013-01-23 10:44       ` Hannes Reinecke
2013-01-23 13:06       ` James Bottomley
2013-01-23 21:21         ` Ewan Milne
2013-01-18 16:27 ` [PATCH RFC 2/9] [SCSI] Generate uevent on sd capacity change Ewan D. Milne
2013-01-18 16:27 ` Ewan D. Milne [this message]
2013-01-18 16:27 ` [PATCH RFC 4/9] [SCSI] Rename scsi_evt_xxx to sdev_evt_xxx and scsi_event to sdev_event Ewan D. Milne
2013-01-22 17:33   ` Bart Van Assche
2013-01-23 21:08     ` Ewan Milne
2013-01-22 17:38   ` Bart Van Assche
2013-01-23 20:39     ` Ewan Milne
2013-01-18 16:27 ` [PATCH RFC 5/9] [SCSI] Add support for scsi_target events Ewan D. Milne
2013-01-18 16:27 ` [PATCH RFC 6/9] [SCSI] Generate uevents for certain Unit Attention codes Ewan D. Milne
2013-01-18 16:27 ` [PATCH RFC 7/9] [SCSI] Add sysfs support for enhanced Unit Attention handling Ewan D. Milne
2013-01-18 16:27 ` [PATCH RFC 8/9] [SCSI] Add sense and Unit Attention generation to scsi_debug Ewan D. Milne
2013-01-19 18:43   ` Douglas Gilbert
2013-01-22 15:12     ` Ewan Milne
2013-01-18 16:27 ` [PATCH RFC 9/9] [SCSI] Streamline detection of FM/EOM/ILI status Ewan D. Milne
2013-01-24  0:19 ` [PATCH RFC 0/9] [SCSI] Enhanced sense and Unit Attention handling Bart Van Assche
2013-01-24 11:38   ` Hannes Reinecke
2013-01-24 14:00     ` Ewan Milne
2013-01-24 14:01     ` Mike Christie
2013-01-24 22:02       ` Ewan Milne
2013-01-24 22:47         ` Mike Christie
2013-01-24 14:38     ` Bart Van Assche
2013-01-24 14:51       ` Hannes Reinecke
2013-01-24 15:00         ` Mike Christie
2013-01-24 15:15           ` Hannes Reinecke
2013-01-24 22:00             ` Ewan Milne
2013-01-26 18:20             ` Mike Christie
2013-01-28  6:56               ` Hannes Reinecke
2013-01-28 15:05       ` Jeremy Linton
2013-01-28 15:44         ` Bart Van Assche
2013-01-28 15:48           ` Hannes Reinecke
2013-01-28 20:26             ` James Bottomley
2013-01-28 15:52           ` Jeremy Linton
2013-01-28 16:04             ` Ewan Milne
2013-01-28 16:18             ` Mike Christie
2013-01-29  5:01         ` Shyam_Iyer
2013-01-24 13:53   ` Ewan Milne
2013-01-31 16:27 ` Ewan Milne

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