File 0015-bcache-tools-make-permit-only-one-cache-device-to-be.patch of Package bcache-tools

From 67163cc86255bb93d524051e488de15172ab396c Mon Sep 17 00:00:00 2001
From: Coly Li <colyli@suse.de>
Date: Sun, 23 Aug 2020 00:26:31 +0800
Subject: [PATCH 15/17] bcache-tools: make: permit only one cache device to be
 specified
Git-commit: 67163cc86255bb93d524051e488de15172ab396c
Patch-mainline: bcache-tools-1.1
References: jsc#SLE-9807

Now a cache set only has a single cache, therefore "bcache make" should
permit only one cache device to be specified for a cache set.

This patch checks if more than one cache devices are specified by "-C"
an error message "Please specify only one cache device" will be printed
and bcache exits with usage information.

Signed-off-by: Coly Li <colyli@suse.de>
---
 make.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/make.c b/make.c
index 9631857..ad89377 100644
--- a/make.c
+++ b/make.c
@@ -604,6 +604,11 @@ int make_bcache(int argc, char **argv)
 		usage();
 	}
 
+	if (ncache_devices > 1) {
+		fprintf(stderr, "Please specify only one cache device\n");
+		usage();
+	}
+
 	if (bucket_size < block_size) {
 		fprintf(stderr,
 			"Bucket size cannot be smaller than block size\n");
-- 
2.26.2