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From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
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From: Xose Vazquez Perez <xose.vazquez@gmail.com>
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Date: Tue, 28 Sep 2021 18:52:10 +0200
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Subject: [PATCH] multipath-tools: make IBM/2107900 (DS8000) config work with
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alua and multibus
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ALUA is supported since the beginning:
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https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/drivers/scsi/device_handler/scsi_dh_alua.c?id=057ea7c9683c3d684128cced796f03c179ecf1c2#n683
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... the DS8000 is an Asymmetric Logical Unit Access (ALUA) capable storage array,
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pag#160(144): https://www.redbooks.ibm.com/redbooks/pdfs/sg248887.pdf
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kernel log:
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https://marc.info/?l=linux-scsi&m=156407413807511&q=mbox
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Cc: Martin Wilck <mwilck@suse.com>
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Cc: Benjamin Marzinski <bmarzins@redhat.com>
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Cc: Christophe Varoqui <christophe.varoqui@opensvc.com>
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Cc: DM-DEVEL ML <dm-devel@redhat.com>
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Signed-off-by: Xose Vazquez Perez <xose.vazquez@gmail.com>
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Reviewed-by: Martin Wilck <mwilck@suse.com>
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Signed-off-by: Benjamin Marzinski <bmarzins@redhat.com>
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---
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libmultipath/hwtable.c | 3 ++-
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1 file changed, 2 insertions(+), 1 deletion(-)
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diff --git a/libmultipath/hwtable.c b/libmultipath/hwtable.c
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index 72f81c60..f115c4f9 100644
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--- a/libmultipath/hwtable.c
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+++ b/libmultipath/hwtable.c
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@@ -656,7 +656,8 @@ static struct hwentry default_hw[] = {
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.vendor = "IBM",
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.product = "^2107900",
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.no_path_retry = NO_PATH_RETRY_QUEUE,
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- .pgpolicy = MULTIBUS,
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+ .pgpolicy = GROUP_BY_PRIO,
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+ .pgfailback = -FAILBACK_IMMEDIATE,
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},
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{
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// Storwize V5000 and V7000 lines / SAN Volume Controller (SVC) / Flex System V7000 /
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