multipath-tools/0005-fix-multipathd-resize-when-not-all-paths-size-are-eq.patch

From 8e3c6debb3ed286f94af230f59a0fb9f6a449687 Mon Sep 17 00:00:00 2001
From: Lixiaokeng <lixiaokeng@huawei.com>
Date: Tue, 23 Nov 2021 20:14:23 +0800
Subject: [PATCH] fix multipathd resize when not all paths size are equal

---
 multipathd/cli_handlers.c | 19 ++++++++++++++++++-
 1 file changed, 18 insertions(+), 1 deletion(-)

diff --git a/multipathd/cli_handlers.c b/multipathd/cli_handlers.c
index 44bf43d..8b59d88 100644
--- a/multipathd/cli_handlers.c
+++ b/multipathd/cli_handlers.c
@@ -845,9 +845,10 @@ cli_resize(void *v, struct strbuf *reply, void *data)
 	char * mapname = get_keyparam(v, KEY_MAP);
 	struct multipath *mpp;
 	int minor;
-	unsigned long long size;
+	unsigned long long size, sz;
 	struct pathgroup *pgp;
 	struct path *pp;
+	int i,j;
 
 	mapname = convert_dev(mapname, 0);
 	condlog(2, "%s: resize map (operator)", mapname);
@@ -885,6 +886,22 @@ cli_resize(void *v, struct strbuf *reply, void *data)
 			mapname);
 		return 1;
 	}
+
+	vector_foreach_slot (mpp->pg, pgp, i) {
+		vector_foreach_slot (pgp->paths, pp, j) {
+			if (!pp->udev || sysfs_get_size(pp, &sz)) {
+				condlog(0, "%s: couldn't get size for sysfs. cannot resize",
+					mapname);
+				return 1;
+			}
+			if (size != sz) {
+				condlog(0, "%s: not all path sizes are equal, please check. cannot resize",
+					mapname);
+				return 1;
+			}
+		}
+	}
+
 	if (size == mpp->size) {
 		condlog(0, "%s: map is still the same size (%llu)", mapname,
 			mpp->size);
-- 
2.33.0