+ return (error);
+}
+
+/*
+ * Determine if the given path is a hot spare within the given configuration.
+ * If no configuration is given we rely solely on the label.
+ */
+static boolean_t
+is_spare(nvlist_t *config, const char *path)
+{
+ int fd;
+ pool_state_t state;
+ char *name = NULL;
+ nvlist_t *label;
+ uint64_t guid, spareguid;
+ nvlist_t *nvroot;
+ nvlist_t **spares;
+ uint_t i, nspares;
+ boolean_t inuse;
+
+ if ((fd = open(path, O_RDONLY)) < 0)
+ return (B_FALSE);
+
+ if (zpool_in_use(g_zfs, fd, &state, &name, &inuse) != 0 ||
+ !inuse ||
+ state != POOL_STATE_SPARE ||
+ zpool_read_label(fd, &label) != 0) {
+ free(name);
+ (void) close(fd);
+ return (B_FALSE);
+ }
+ free(name);
+ (void) close(fd);
+
+ if (config == NULL)
+ return (B_TRUE);
+
+ verify(nvlist_lookup_uint64(label, ZPOOL_CONFIG_GUID, &guid) == 0);
+ nvlist_free(label);
+
+ verify(nvlist_lookup_nvlist(config, ZPOOL_CONFIG_VDEV_TREE,
+ &nvroot) == 0);
+ if (nvlist_lookup_nvlist_array(nvroot, ZPOOL_CONFIG_SPARES,
+ &spares, &nspares) == 0) {
+ for (i = 0; i < nspares; i++) {
+ verify(nvlist_lookup_uint64(spares[i],
+ ZPOOL_CONFIG_GUID, &spareguid) == 0);
+ if (spareguid == guid)
+ return (B_TRUE);
+ }
+ }
+
+ return (B_FALSE);