This is a note to let you know that I've just added the patch titled
target: Allow READ_CAPACITY opcode in ALUA Standby access state
to the 3.14-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
target-allow-read_capacity-opcode-in-alua-standby-access-state.patch
and it can be found in the queue-3.14 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From e7810c2d2c37fa8e58dda74b00790dab60fe6fba Mon Sep 17 00:00:00 2001
From: Nicholas Bellinger <nab@xxxxxxxxxxxxxxx>
Date: Thu, 5 Jun 2014 23:37:00 -0700
Subject: target: Allow READ_CAPACITY opcode in ALUA Standby access state
From: Nicholas Bellinger <nab@xxxxxxxxxxxxxxx>
commit e7810c2d2c37fa8e58dda74b00790dab60fe6fba upstream.
This patch allows READ_CAPACITY + SAI_READ_CAPACITY_16 opcode
processing to occur while the associated ALUA group is in Standby
access state.
This is required to avoid host side LUN probe failures during the
initial scan if an ALUA group has already implicitly changed into
Standby access state.
This addresses a bug reported by Chris + Philip using dm-multipath
+ ESX hosts configured with ALUA multipath.
(Drop v3.15 specific set_ascq usage - nab)
Reported-by: Chris Boot <crb@xxxxxxxxxxxxxxxxxxxxx>
Reported-by: Philip Gaw <pgaw@xxxxxxxxxxxxxxx>
Cc: Chris Boot <crb@xxxxxxxxxxxxxxxxxxxxx>
Cc: Philip Gaw <pgaw@xxxxxxxxxxxxxxx>
Cc: Hannes Reinecke <hare@xxxxxxx>
Signed-off-by: Nicholas Bellinger <nab@xxxxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/target/target_core_alua.c | 9 +++++++++
1 file changed, 9 insertions(+)
--- a/drivers/target/target_core_alua.c
+++ b/drivers/target/target_core_alua.c
@@ -564,7 +564,16 @@ static inline int core_alua_state_standb
case REPORT_LUNS:
case RECEIVE_DIAGNOSTIC:
case SEND_DIAGNOSTIC:
+ case READ_CAPACITY:
return 0;
+ case SERVICE_ACTION_IN:
+ switch (cdb[1] & 0x1f) {
+ case SAI_READ_CAPACITY_16:
+ return 0;
+ default:
+ *alua_ascq = ASCQ_04H_ALUA_TG_PT_STANDBY;
+ return 1;
+ }
case MAINTENANCE_IN:
switch (cdb[1] & 0x1f) {
case MI_REPORT_TARGET_PGS:
Patches currently in stable-queue which might be from nab@xxxxxxxxxxxxxxx are
queue-3.14/target-allow-read_capacity-opcode-in-alua-standby-access-state.patch
queue-3.14/iser-target-fix-multi-network-portal-shutdown-regression.patch
queue-3.14/target-iscsi-iser-avoid-accepting-transport-connections-during-stop-stage.patch
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