move_spare function modified and moved to Manage.c

[thirdparty/mdadm.git] / Manage.c

diff --git a/Manage.c b/Manage.c
index 81fa986d770c2f8ee201b61b90944c62390db624..6b0853d70e9159b47c42c152d1bbcff344a5f492 100644 (file)
--- 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