/* * Change state of port (ie from forwarding to blocking etc) * Used by spanning tree in user space. */ static int br_rtm_setlink(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg) { struct net *net = sock_net(skb->sk); struct ifinfomsg *ifm; struct nlattr *protinfo; struct net_device *dev; struct net_bridge_port *p; u8 new_state; if (nlmsg_len(nlh) < sizeof(*ifm)) return -EINVAL; ifm = nlmsg_data(nlh); if (ifm->ifi_family != AF_BRIDGE) return -EPFNOSUPPORT; protinfo = nlmsg_find_attr(nlh, sizeof(*ifm), IFLA_PROTINFO); if (!protinfo || nla_len(protinfo) < sizeof(u8)) return -EINVAL; new_state = nla_get_u8(protinfo); if (new_state > BR_STATE_BLOCKING) return -EINVAL; dev = __dev_get_by_index(net, ifm->ifi_index); if (!dev) return -ENODEV; p = br_port_get_rtnl(dev); if (!p) return -EINVAL; /* if kernel STP is running, don't allow changes */ if (p->br->stp_enabled == BR_KERNEL_STP) return -EBUSY; if (!netif_running(dev) || (!netif_carrier_ok(dev) && new_state != BR_STATE_DISABLED)) return -ENETDOWN; p->state = new_state; br_log_state(p); spin_lock_bh(&p->br->lock); br_port_state_selection(p->br); spin_unlock_bh(&p->br->lock); br_ifinfo_notify(RTM_NEWLINK, p); return 0; }
/* Change the state of the port and notify spanning tree */ static int br_set_port_state(struct net_bridge_port *p, u8 state) { if (state > BR_STATE_BLOCKING) return -EINVAL; /* if kernel STP is running, don't allow changes */ if (p->br->stp_enabled == BR_KERNEL_STP) return -EBUSY; if (!netif_running(p->dev) || (!netif_carrier_ok(p->dev) && state != BR_STATE_DISABLED)) return -ENETDOWN; p->state = state; br_log_state(p); br_port_state_selection(p->br); return 0; }
/* * Change state of port (ie from forwarding to blocking etc) * Used by spanning tree in user space. */ static int br_rtm_setlink(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg) { struct ifinfomsg *ifm; struct nlattr *protinfo; struct net_device *dev; struct net_bridge_port *p; u8 new_state; if (nlmsg_len(nlh) < sizeof(*ifm)) return -EINVAL; ifm = nlmsg_data(nlh); if (ifm->ifi_family != AF_BRIDGE) return -EPFNOSUPPORT; protinfo = nlmsg_find_attr(nlh, sizeof(*ifm), IFLA_PROTINFO); if (!protinfo || nla_len(protinfo) < sizeof(u8)) return -EINVAL; new_state = nla_get_u8(protinfo); if (new_state > BR_STATE_BLOCKING) return -EINVAL; dev = __if_dev_get_by_index(ifm->ifi_index); if (!dev) return -ENODEV; p = dev->br_port; if (!p) return -EINVAL; /* if kernel STP is running, don't allow changes */ if (p->br->stp_enabled) return -EBUSY; if (!if_dev_admin_up(dev) || (!if_dev_running(dev) && new_state != BR_STATE_DISABLED)) return -ENETDOWN; p->state = new_state; br_log_state(p); return 0; }
/* Change the state of the port and notify spanning tree */ static int br_set_port_state(struct net_bridge_port *p, u8 state) { if (state > BR_STATE_BLOCKING) return -EINVAL; /* if kernel STP is running, don't allow changes */ if (p->br->stp_enabled == BR_KERNEL_STP) return -EBUSY; /* if device is not up, change is not allowed * if link is not present, only allowable state is disabled */ if (!netif_running(p->dev) || (!netif_oper_up(p->dev) && state != BR_STATE_DISABLED)) return -ENETDOWN; p->state = state; br_log_state(p); br_port_state_selection(p->br); return 0; }