move_spare function modified and moved to Manage.c

It will also be needed for Incremental.

Signed-off-by: Anna Czarnowska <anna.czarnowska@intel.com>
Signed-off-by: NeilBrown <neilb@suse.de>

1 files changed, 44 insertions, 0 deletions

diff --git a/Manage.c b/Manage.c
index 81fa986..6b0853d 100644
--- a/Manage.c
+++ b/Manage.c
@@ -1096,4 +1096,48 @@ int Update_subarray(char *dev, char *subarray, char *update, struct mddev_ident
 
 	return rv;
 }
+
+/* Move spare from one array to another
+ * If adding to destination array fails
+ * add back to original array
+ * Returns 1 on success, 0 on failure */
+int move_spare(char *from_devname, char *to_devname, dev_t devid)
+{
+	struct mddev_dev devlist;
+	char devname[20];
+
+	/* try to remove and add */
+	int fd1 = open(to_devname, O_RDONLY);
+	int fd2 = open(from_devname, O_RDONLY);
+
+	if (fd1 < 0 || fd2 < 0) {
+		if (fd1>=0) close(fd1);
+		if (fd2>=0) close(fd2);
+		return 0;
+	}
+
+	devlist.next = NULL;
+	devlist.used = 0;
+	devlist.re_add = 0;
+	devlist.writemostly = 0;
+	devlist.devname = devname;
+	sprintf(devname, "%d:%d", major(devid), minor(devid));
+
+	devlist.disposition = 'r';
+	if (Manage_subdevs(from_devname, fd2, &devlist, -1, 0, NULL) == 0) {
+		devlist.disposition = 'a';
+		if (Manage_subdevs(to_devname, fd1, &devlist, -1, 0, NULL) == 0) {
+			/* make sure manager is aware of changes */
+			ping_manager(to_devname);
+			ping_manager(from_devname);
+			close(fd1);
+			close(fd2);
+			return 1;
+		}
+		else Manage_subdevs(from_devname, fd2, &devlist, -1, 0, NULL);
+	}
+	close(fd1);
+	close(fd2);
+	return 0;
+}
 #endif