linux-kernel - [PATCH v2] dlm: Make dismatch error message more clear

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Date:   Thu, 18 May 2017 10:42:12 +0800
From:   Gang He <ghe@...e.com>
To:     ccaulfie@...hat.com, teigland@...hat.com
Cc:     Gang He <ghe@...e.com>, hch@....de, cluster-devel@...hat.com,
        linux-kernel@...r.kernel.org
Subject: [PATCH v2] dlm: Make dismatch error message more clear

This change will try to make this error message more clear,
since the upper applications (e.g. ocfs2) invoke dlm_new_lockspace
to create a new lockspace with passing a cluster name. Sometimes,
dlm_new_lockspace return failure while two cluster names dismatch,
the user is a little confused since this line error message is not
enough obvious.

Signed-off-by: Gang He <ghe@...e.com>
---
 fs/dlm/lockspace.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/fs/dlm/lockspace.c b/fs/dlm/lockspace.c
index 91592b7..b03d808 100644
--- a/fs/dlm/lockspace.c
+++ b/fs/dlm/lockspace.c
@@ -455,7 +455,8 @@ static int new_lockspace(const char *name, const char *cluster,
 
 	if (dlm_config.ci_recover_callbacks && cluster &&
 	    strncmp(cluster, dlm_config.ci_cluster_name, DLM_LOCKSPACE_LEN)) {
-		log_print("dlm cluster name %s mismatch %s",
+		log_print("dlm cluster name '%s' does not match "
+			  "the application cluster name '%s'",
 			  dlm_config.ci_cluster_name, cluster);
 		error = -EBADR;
 		goto out;
-- 
1.8.5.6