device-mapper-multipath/0096-multipathd-check-and-update-all-paths-when-in-cli_re.patch

From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Benjamin Marzinski <bmarzins@redhat.com>
Date: Thu, 9 Nov 2023 18:46:13 -0500
Subject: [PATCH] multipathd: check and update all paths when in cli_resize

When resizing a multipath device, make sure that all the paths have
been updated to the new size first.

Signed-off-by: Benjamin Marzinski <bmarzins@redhat.com>
Reviewed-by: Martin Wilck <mwilck@suse.com>
---
 multipathd/cli_handlers.c | 31 ++++++++++++++++++-------------
 1 file changed, 18 insertions(+), 13 deletions(-)

diff --git a/multipathd/cli_handlers.c b/multipathd/cli_handlers.c
index f322f10f..93c32c5b 100644
--- a/multipathd/cli_handlers.c
+++ b/multipathd/cli_handlers.c
@@ -866,9 +866,11 @@ cli_resize(void *v, char **reply, int *len, void *data)
 	char * mapname = get_keyparam(v, MAP);
 	struct multipath *mpp;
 	int minor;
-	unsigned long long size;
+	unsigned long long size = 0;
 	struct pathgroup *pgp;
 	struct path *pp;
+	unsigned int i, j;
+	bool mismatch = false;
 
 	mapname = convert_dev(mapname, 0);
 	condlog(2, "%s: resize map (operator)", mapname);
@@ -888,21 +890,24 @@ cli_resize(void *v, char **reply, int *len, void *data)
 		return 1;
 	}
 
-	pgp = VECTOR_SLOT(mpp->pg, 0);
-
-	if (!pgp){
-		condlog(0, "%s: couldn't get path group. cannot resize",
-			mapname);
-		return 1;
+	vector_foreach_slot(mpp->pg, pgp, i) {
+		vector_foreach_slot (pgp->paths, pp, j) {
+			sysfs_get_size(pp, &pp->size);
+			if (!pp->size)
+				continue;
+			if (!size)
+				size = pp->size;
+			else if (pp->size != size)
+				mismatch = true;
+		}
 	}
-	pp = VECTOR_SLOT(pgp->paths, 0);
-
-	if (!pp){
-		condlog(0, "%s: couldn't get path. cannot resize", mapname);
+	if (!size) {
+		condlog(0, "%s: couldn't get size from sysfs. cannot resize",
+			mapname);
 		return 1;
 	}
-	if (!pp->udev || sysfs_get_size(pp, &size)) {
-		condlog(0, "%s: couldn't get size for sysfs. cannot resize",
+	if (mismatch) {
+		condlog(0, "%s: path size not consistent. cannot resize",
 			mapname);
 		return 1;
 	}