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From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
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From: Benjamin Marzinski <bmarzins@redhat.com>
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Date: Tue, 9 Aug 2022 16:46:26 -0500
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Subject: [PATCH] multipathd: factor out the code to flush a map with no paths
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The code to flush a multipath device because all of its paths have
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been removed will be used by another caller, so factor it out of
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ev_remove_path().
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Signed-off-by: Benjamin Marzinski <bmarzins@redhat.com>
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Reviewed-by: Martin Wilck <mwilck@suse.com>
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---
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multipathd/main.c | 56 ++++++++++++++++++++++++-----------------------
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1 file changed, 29 insertions(+), 27 deletions(-)
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diff --git a/multipathd/main.c b/multipathd/main.c
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index ed2515e5..b00eae3f 100644
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--- a/multipathd/main.c
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+++ b/multipathd/main.c
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@@ -488,6 +488,30 @@ int update_multipath (struct vectors *vecs, char *mapname, int reset)
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return 0;
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}
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+static bool
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+flush_map_nopaths(struct multipath *mpp, struct vectors *vecs) {
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+ char alias[WWID_SIZE];
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+
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+ /*
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+ * flush_map will fail if the device is open
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+ */
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+ strlcpy(alias, mpp->alias, WWID_SIZE);
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+ if (mpp->flush_on_last_del == FLUSH_ENABLED) {
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+ condlog(2, "%s Last path deleted, disabling queueing",
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+ mpp->alias);
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+ mpp->retry_tick = 0;
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+ mpp->no_path_retry = NO_PATH_RETRY_FAIL;
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+ mpp->disable_queueing = 1;
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+ mpp->stat_map_failures++;
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+ dm_queue_if_no_path(mpp->alias, 0);
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+ }
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+ if (!flush_map(mpp, vecs, 1)) {
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+ condlog(2, "%s: removed map after removing all paths", alias);
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+ return true;
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+ }
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+ return false;
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+}
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+
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static int
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update_map (struct multipath *mpp, struct vectors *vecs, int new_map)
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{
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@@ -1247,34 +1271,12 @@ ev_remove_path (struct path *pp, struct vectors * vecs, int need_do_map)
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vector_del_slot(mpp->paths, i);
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/*
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- * remove the map IF removing the last path
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+ * remove the map IF removing the last path. If
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+ * flush_map_nopaths succeeds, the path has been removed.
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*/
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- if (VECTOR_SIZE(mpp->paths) == 0) {
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- char alias[WWID_SIZE];
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-
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- /*
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- * flush_map will fail if the device is open
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- */
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- strlcpy(alias, mpp->alias, WWID_SIZE);
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- if (mpp->flush_on_last_del == FLUSH_ENABLED) {
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- condlog(2, "%s Last path deleted, disabling queueing", mpp->alias);
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- mpp->retry_tick = 0;
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- mpp->no_path_retry = NO_PATH_RETRY_FAIL;
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- mpp->disable_queueing = 1;
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- mpp->stat_map_failures++;
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- dm_queue_if_no_path(mpp->alias, 0);
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- }
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- if (!flush_map(mpp, vecs, 1)) {
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- condlog(2, "%s: removed map after"
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- " removing all paths",
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- alias);
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- /* flush_map() has freed the path */
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- goto out;
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- }
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- /*
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- * Not an error, continue
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- */
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- }
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+ if (VECTOR_SIZE(mpp->paths) == 0 &&
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+ flush_map_nopaths(mpp, vecs))
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+ goto out;
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if (setup_map(mpp, ¶ms, vecs)) {
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condlog(0, "%s: failed to setup map for"
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