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From 7a7b96246b84ccf533a6f4dc0424830792fdb96a Mon Sep 17 00:00:00 2001
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From: Martin Wilck <mwilck@suse.com>
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Date: Fri, 3 Jul 2020 15:17:09 +0200
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Subject: [PATCH] libmultipath: select_action(): don't drop map if alias
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clashes
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If for a given map, if we find that the requested alias is already
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used by a map with different WWID, while the map's own WWID is
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not used yet, give up the alias and use the WWID instead. This
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is safer than trying to destroy the existing map, which is likely
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to fail.
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This allows us to make use const for the "curmp" parameter.
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Reviewed-by: Benjamin Marzinski <bmarzins@redhat.com>
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---
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libmultipath/configure.c | 11 ++++++-----
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1 file changed, 6 insertions(+), 5 deletions(-)
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diff --git a/libmultipath/configure.c b/libmultipath/configure.c
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index b7113291..2e8f34f9 100644
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--- a/libmultipath/configure.c
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+++ b/libmultipath/configure.c
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@@ -690,12 +690,13 @@ select_action (struct multipath * mpp, vector curmp, int force_reload)
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}
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if (!cmpp) {
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- condlog(2, "%s: remove (wwid changed)", mpp->alias);
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- dm_flush_map(mpp->alias);
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- strlcpy(cmpp_by_name->wwid, mpp->wwid, WWID_SIZE);
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- drop_multipath(curmp, cmpp_by_name->wwid, KEEP_PATHS);
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+ condlog(1, "%s: can't use alias \"%s\" used by %s, falling back to WWID",
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+ mpp->wwid, mpp->alias, cmpp_by_name->wwid);
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+ /* We can do this because wwid wasn't found */
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+ free(mpp->alias);
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+ mpp->alias = strdup(mpp->wwid);
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mpp->action = ACT_CREATE;
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- condlog(3, "%s: set ACT_CREATE (map wwid change)",
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+ condlog(3, "%s: set ACT_CREATE (map does not exist, name changed)",
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mpp->alias);
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return;
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}
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--
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2.17.2
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