|
 |
c90e5b |
From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
|
|
|
c90e5b |
From: Benjamin Marzinski <bmarzins@redhat.com>
|
|
|
c90e5b |
Date: Fri, 11 Feb 2022 17:23:39 -0600
|
|
|
c90e5b |
Subject: [PATCH] multipathd: disallow changing to/from fpin marginal paths on
|
|
|
c90e5b |
reconfig
|
|
|
c90e5b |
|
|
|
c90e5b |
Setting marginal_pathgroups to fpin causes two new threads to be created
|
|
|
c90e5b |
when multipathd starts. Turning it on after multipathd starts up won't
|
|
|
c90e5b |
cause the theads to start, and turing it off won't keep the threads from
|
|
|
c90e5b |
working. So disallow changing marginal_pathgroups to/from "fpin" on
|
|
|
c90e5b |
reconfigure.
|
|
|
c90e5b |
|
|
|
c90e5b |
Signed-off-by: Benjamin Marzinski <bmarzins@redhat.com>
|
|
|
c90e5b |
---
|
|
|
c90e5b |
multipath/multipath.conf.5 | 13 ++++++++-----
|
|
|
c90e5b |
multipathd/main.c | 9 +++++++++
|
|
|
c90e5b |
2 files changed, 17 insertions(+), 5 deletions(-)
|
|
|
c90e5b |
|
|
|
c90e5b |
diff --git a/multipath/multipath.conf.5 b/multipath/multipath.conf.5
|
|
|
c90e5b |
index 805b7a5e..8e418372 100644
|
|
|
c90e5b |
--- a/multipath/multipath.conf.5
|
|
|
c90e5b |
+++ b/multipath/multipath.conf.5
|
|
|
c90e5b |
@@ -1077,15 +1077,18 @@ have been tried first. This prevents the possibility of IO errors occuring
|
|
|
c90e5b |
while marginal paths are still usable. After the path has been monitored
|
|
|
c90e5b |
for the configured time, and is declared healthy, it will be returned to its
|
|
|
c90e5b |
normal pathgroup.
|
|
|
c90e5b |
-However if this option is set to \fIfpin\fR multipathd will receive fpin
|
|
|
c90e5b |
+If this option is set to \fIfpin\fR, multipathd will receive fpin
|
|
|
c90e5b |
notifications, set path states to "marginal" accordingly, and regroup paths
|
|
|
c90e5b |
-as described for "marginal_pathgroups yes". This option can't be used in combination
|
|
|
c90e5b |
-with other options for "Shaky path detection" (see below).If it is set to fpin,
|
|
|
c90e5b |
-marginal_path_xyz and san_path_err_xyz parameters are implicitly set to 0.
|
|
|
c90e5b |
+as described for \fIon\fR. This option can't be used in combination
|
|
|
c90e5b |
+with other options for "Shaky path detection" (see below). \fBNote:\fR If this
|
|
|
c90e5b |
+is set to \fIfpin\fR, the \fImarginal_path_*\fR and \fIsan_path_err_*\fR
|
|
|
c90e5b |
+options are implicitly set to \fIno\fP. Also, this option cannot be switched
|
|
|
c90e5b |
+either to or from \fIfpin\fR on a multipathd reconfigure. multipathd must be
|
|
|
c90e5b |
+restarted for the change to take effect.
|
|
|
c90e5b |
See "Shaky paths detection" below for more information.
|
|
|
c90e5b |
.RS
|
|
|
c90e5b |
.TP
|
|
|
c90e5b |
-The default is: \fBno\fR
|
|
|
c90e5b |
+The default is: \fBoff\fR
|
|
|
c90e5b |
.RE
|
|
|
c90e5b |
.
|
|
|
c90e5b |
.
|
|
|
c90e5b |
diff --git a/multipathd/main.c b/multipathd/main.c
|
|
|
c90e5b |
index 4cf5bc41..a6ffbe32 100644
|
|
|
c90e5b |
--- a/multipathd/main.c
|
|
|
c90e5b |
+++ b/multipathd/main.c
|
|
|
c90e5b |
@@ -2675,6 +2675,7 @@ int
|
|
|
c90e5b |
reconfigure (struct vectors * vecs)
|
|
|
c90e5b |
{
|
|
|
c90e5b |
struct config * old, *conf;
|
|
|
c90e5b |
+ int old_marginal_pathgroups;
|
|
|
c90e5b |
|
|
|
c90e5b |
conf = load_config(DEFAULT_CONFIGFILE);
|
|
|
c90e5b |
if (!conf)
|
|
|
c90e5b |
@@ -2702,6 +2703,14 @@ reconfigure (struct vectors * vecs)
|
|
|
c90e5b |
uxsock_timeout = conf->uxsock_timeout;
|
|
|
c90e5b |
|
|
|
c90e5b |
old = rcu_dereference(multipath_conf);
|
|
|
c90e5b |
+ old_marginal_pathgroups = old->marginal_pathgroups;
|
|
|
c90e5b |
+ if ((old_marginal_pathgroups == MARGINAL_PATHGROUP_FPIN) !=
|
|
|
c90e5b |
+ (conf->marginal_pathgroups == MARGINAL_PATHGROUP_FPIN)) {
|
|
|
c90e5b |
+ condlog(1, "multipathd must be restarted to turn %s fpin marginal paths",
|
|
|
c90e5b |
+ (old_marginal_pathgroups == MARGINAL_PATHGROUP_FPIN)?
|
|
|
c90e5b |
+ "off" : "on");
|
|
|
c90e5b |
+ conf->marginal_pathgroups = old_marginal_pathgroups;
|
|
|
c90e5b |
+ }
|
|
|
c90e5b |
conf->sequence_nr = old->sequence_nr + 1;
|
|
|
c90e5b |
rcu_assign_pointer(multipath_conf, conf);
|
|
|
c90e5b |
call_rcu(&old->rcu, rcu_free_config);
|