+ struct cn_msg *msg = data;
+ struct w1_netlink_msg *m = (struct w1_netlink_msg *)(msg + 1);
+ struct w1_netlink_cmd *cmd;
+ struct w1_slave *sl;
+ struct w1_master *dev;
+ int err = 0;
+
+ while (msg->len && !err) {
+ struct w1_reg_num id;
+ u16 mlen = m->len;
+ u8 *cmd_data = m->data;
+
+ dev = NULL;
+ sl = NULL;
+
+ memcpy(&id, m->id.id, sizeof(id));
+#if 0
+ printk("%s: %02x.%012llx.%02x: type=%02x, len=%u.\n",
+ __func__, id.family, (unsigned long long)id.id, id.crc, m->type, m->len);
+#endif
+ if (m->len + sizeof(struct w1_netlink_msg) > msg->len) {
+ err = -E2BIG;
+ break;
+ }
+
+ if (!mlen)
+ goto out_cont;
+
+ if (m->type == W1_MASTER_CMD) {
+ dev = w1_search_master_id(m->id.mst.id);
+ } else if (m->type == W1_SLAVE_CMD) {
+ sl = w1_search_slave(&id);
+ if (sl)
+ dev = sl->master;
+ }
+
+ if (!dev) {
+ err = -ENODEV;
+ goto out_cont;
+ }
+
+ mutex_lock(&dev->mutex);
+
+ if (sl && w1_reset_select_slave(sl)) {
+ err = -ENODEV;
+ goto out_up;
+ }
+
+ while (mlen) {
+ cmd = (struct w1_netlink_cmd *)cmd_data;
+
+ if (cmd->len + sizeof(struct w1_netlink_cmd) > mlen) {
+ err = -E2BIG;
+ break;
+ }
+
+ if (sl)
+ w1_process_command_slave(sl, msg, m, cmd);
+ else
+ w1_process_command_master(dev, msg, m, cmd);
+
+ cmd_data += cmd->len + sizeof(struct w1_netlink_cmd);
+ mlen -= cmd->len + sizeof(struct w1_netlink_cmd);
+ }
+out_up:
+ atomic_dec(&dev->refcnt);
+ if (sl)
+ atomic_dec(&sl->refcnt);
+ mutex_unlock(&dev->mutex);
+out_cont:
+ msg->len -= sizeof(struct w1_netlink_msg) + m->len;
+ m = (struct w1_netlink_msg *)(((u8 *)m) + sizeof(struct w1_netlink_msg) + m->len);
+
+ /*
+ * Let's allow requests for nonexisting devices.
+ */
+ if (err == -ENODEV)
+ err = 0;
+ }
+#if 0
+ if (err) {
+ printk("%s: malformed message. Dropping.\n", __func__);
+ }
+#endif