bcacheadm: fix variable bucket size input

If the user added n caches but <n bucket_sizes, print a message
saying that cache# will be using the default bucket_size

Change-Id: I025474ca672bf79d1c88813e6f030ba7590e820d
Signed-off-by: Jacob Malevich <jam@daterainc.com>

1 files changed, 11 insertions, 3 deletions

diff --git a/bcache.c b/bcache.c
index 2bc32c0..f64fda7 100644
--- a/bcache.c
+++ b/bcache.c
@@ -582,10 +582,18 @@ void write_cache_sbs(int *fds, struct cache_sb *sb,
 	for (i = 0; i < sb->nr_in_set; i++) {
 		struct cache_member *m = sb->members + i;
 
-		if (num_bucket_sizes <= 1)
+		if (num_bucket_sizes <= 1) {
 			sb->bucket_size = bucket_sizes[0];
-		else
-			sb->bucket_size	= bucket_sizes[i];
+		} else {
+			if (!bucket_sizes[i]) {
+				printf("No bucket size specified for cache %d,"
+				       " using the default of %d",
+				       i, bucket_sizes[0]);
+				sb->bucket_size = bucket_sizes[0];
+			} else {
+				sb->bucket_size	= bucket_sizes[i];
+			}
+		}
 		SET_CACHE_BTREE_NODE_SIZE(sb, min_size);