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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: Mon, 18 Jan 2021 22:46:04 -0600
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Subject: [PATCH] multipathd: cleanup logging for marginal paths
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io_err_stat logged at level 2 whenever it enqueued a path to check,
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which could happen multiple times while a path was marginal. On the
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other hand if marginal_pathgroups wasn't set, multipathd didn't log when
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paths were set to marginal. Now io_err_stat only logs at level 2 when
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something unexpected happens, but multipathd will always log when a
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path switches its marginal state.
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This patch also fixes an issue where paths in the delayed state could
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get set to the pending state if they could not be checked in time.
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Aside from going against the idea the paths should not be set to pending
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if they already have a valid state, this caused multipathd to log a
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message whenever the path state switched to from delayed to pending and
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then back.
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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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libmultipath/io_err_stat.c | 7 +++----
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multipathd/main.c | 20 +++++++++++++-------
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2 files changed, 16 insertions(+), 11 deletions(-)
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diff --git a/libmultipath/io_err_stat.c b/libmultipath/io_err_stat.c
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index bf1d3910..ee711f7f 100644
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--- a/libmultipath/io_err_stat.c
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+++ b/libmultipath/io_err_stat.c
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@@ -254,7 +254,7 @@ static int enqueue_io_err_stat_by_path(struct path *path)
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vector_set_slot(io_err_pathvec, p);
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pthread_mutex_unlock(&io_err_pathvec_lock);
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- io_err_stat_log(2, "%s: enqueue path %s to check",
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+ io_err_stat_log(3, "%s: enqueue path %s to check",
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path->mpp->alias, path->dev);
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return 0;
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@@ -353,7 +353,7 @@ int need_io_err_check(struct path *pp)
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if (uatomic_read(&io_err_thread_running) == 0)
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return 0;
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if (count_active_paths(pp->mpp) <= 0) {
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- io_err_stat_log(2, "%s: recover path early", pp->dev);
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+ io_err_stat_log(2, "%s: no paths. recovering early", pp->dev);
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goto recover;
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}
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if (pp->io_err_pathfail_cnt != PATH_IO_ERR_WAITING_TO_CHECK)
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@@ -371,8 +371,7 @@ int need_io_err_check(struct path *pp)
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* Or else, return 1 to set path state to PATH_SHAKY
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*/
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if (r == 1) {
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- io_err_stat_log(3, "%s: enqueue fails, to recover",
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- pp->dev);
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+ io_err_stat_log(2, "%s: enqueue failed. recovering early", pp->dev);
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goto recover;
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} else
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pp->io_err_pathfail_cnt = PATH_IO_ERR_IN_CHECKING;
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diff --git a/multipathd/main.c b/multipathd/main.c
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index 1d0579e9..cc1aeea2 100644
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--- a/multipathd/main.c
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+++ b/multipathd/main.c
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@@ -2041,8 +2041,8 @@ check_path (struct vectors * vecs, struct path * pp, unsigned int ticks)
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pathinfo(pp, conf, 0);
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pthread_cleanup_pop(1);
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return 1;
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- } else if ((newstate != PATH_UP && newstate != PATH_GHOST) &&
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- (pp->state == PATH_DELAYED)) {
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+ } else if ((newstate != PATH_UP && newstate != PATH_GHOST &&
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+ newstate != PATH_PENDING) && (pp->state == PATH_DELAYED)) {
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/* If path state become failed again cancel path delay state */
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pp->state = newstate;
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return 1;
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@@ -2104,8 +2104,9 @@ check_path (struct vectors * vecs, struct path * pp, unsigned int ticks)
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if ((newstate == PATH_UP || newstate == PATH_GHOST) &&
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(san_path_check_enabled(pp->mpp) ||
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marginal_path_check_enabled(pp->mpp))) {
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- int was_marginal = pp->marginal;
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if (should_skip_path(pp)) {
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+ if (!pp->marginal && pp->state != PATH_DELAYED)
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+ condlog(2, "%s: path is now marginal", pp->dev);
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if (!marginal_pathgroups) {
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if (marginal_path_check_enabled(pp->mpp))
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/* to reschedule as soon as possible,
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@@ -2115,13 +2116,18 @@ check_path (struct vectors * vecs, struct path * pp, unsigned int ticks)
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pp->state = PATH_DELAYED;
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return 1;
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}
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- if (!was_marginal) {
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+ if (!pp->marginal) {
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pp->marginal = 1;
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marginal_changed = 1;
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}
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- } else if (marginal_pathgroups && was_marginal) {
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- pp->marginal = 0;
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- marginal_changed = 1;
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+ } else {
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+ if (pp->marginal || pp->state == PATH_DELAYED)
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+ condlog(2, "%s: path is no longer marginal",
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+ pp->dev);
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+ if (marginal_pathgroups && pp->marginal) {
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+ pp->marginal = 0;
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+ marginal_changed = 1;
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+ }
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}
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}
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--
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2.17.2
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