^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) // SPDX-License-Identifier: GPL-2.0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) /* Copyright 2011-2014 Autronica Fire and Security AS
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) * Author(s):
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) * 2011-2014 Arvid Brodin, arvid.brodin@alten.se
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) * Event handling for HSR and PRP devices.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) #include <linux/netdevice.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) #include <net/rtnetlink.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) #include <linux/rculist.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) #include <linux/timer.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) #include <linux/etherdevice.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) #include "hsr_main.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) #include "hsr_device.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) #include "hsr_netlink.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) #include "hsr_framereg.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) #include "hsr_slave.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) static bool hsr_slave_empty(struct hsr_priv *hsr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) struct hsr_port *port;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) hsr_for_each_port(hsr, port)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) if (port->type != HSR_PT_MASTER)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) return false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) return true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) static int hsr_netdev_notify(struct notifier_block *nb, unsigned long event,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) void *ptr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) struct hsr_port *port, *master;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) struct net_device *dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) struct hsr_priv *hsr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) LIST_HEAD(list_kill);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) int mtu_max;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) int res;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) dev = netdev_notifier_info_to_dev(ptr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) port = hsr_port_get_rtnl(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) if (!port) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) if (!is_hsr_master(dev))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) return NOTIFY_DONE; /* Not an HSR device */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) hsr = netdev_priv(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) port = hsr_port_get_hsr(hsr, HSR_PT_MASTER);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) if (!port) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) /* Resend of notification concerning removed device? */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) return NOTIFY_DONE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) hsr = port->hsr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) switch (event) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) case NETDEV_UP: /* Administrative state DOWN */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) case NETDEV_DOWN: /* Administrative state UP */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) case NETDEV_CHANGE: /* Link (carrier) state changes */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) hsr_check_carrier_and_operstate(hsr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) case NETDEV_CHANGENAME:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) if (is_hsr_master(dev))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) hsr_debugfs_rename(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) case NETDEV_CHANGEADDR:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) if (port->type == HSR_PT_MASTER) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) /* This should not happen since there's no
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) * ndo_set_mac_address() for HSR devices - i.e. not
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) * supported.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) master = hsr_port_get_hsr(hsr, HSR_PT_MASTER);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) if (port->type == HSR_PT_SLAVE_A) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) ether_addr_copy(master->dev->dev_addr, dev->dev_addr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) call_netdevice_notifiers(NETDEV_CHANGEADDR,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) master->dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) /* Make sure we recognize frames from ourselves in hsr_rcv() */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) port = hsr_port_get_hsr(hsr, HSR_PT_SLAVE_B);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) res = hsr_create_self_node(hsr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) master->dev->dev_addr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) port ?
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) port->dev->dev_addr :
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) master->dev->dev_addr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) if (res)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) netdev_warn(master->dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) "Could not update HSR node address.\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) case NETDEV_CHANGEMTU:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) if (port->type == HSR_PT_MASTER)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) break; /* Handled in ndo_change_mtu() */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) mtu_max = hsr_get_max_mtu(port->hsr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) master = hsr_port_get_hsr(port->hsr, HSR_PT_MASTER);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) master->dev->mtu = mtu_max;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) case NETDEV_UNREGISTER:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) if (!is_hsr_master(dev)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) master = hsr_port_get_hsr(port->hsr, HSR_PT_MASTER);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) hsr_del_port(port);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) if (hsr_slave_empty(master->hsr)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) const struct rtnl_link_ops *ops;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) ops = master->dev->rtnl_link_ops;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) ops->dellink(master->dev, &list_kill);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) unregister_netdevice_many(&list_kill);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) case NETDEV_PRE_TYPE_CHANGE:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) /* HSR works only on Ethernet devices. Refuse slave to change
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) * its type.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) return NOTIFY_BAD;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) return NOTIFY_DONE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) struct hsr_port *hsr_port_get_hsr(struct hsr_priv *hsr, enum hsr_port_type pt)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) struct hsr_port *port;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) hsr_for_each_port(hsr, port)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) if (port->type == pt)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) return port;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) return NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) static struct notifier_block hsr_nb = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) .notifier_call = hsr_netdev_notify, /* Slave event notifications */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) static int __init hsr_init(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) int res;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) BUILD_BUG_ON(sizeof(struct hsr_tag) != HSR_HLEN);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) register_netdevice_notifier(&hsr_nb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) res = hsr_netlink_init();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) return res;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) static void __exit hsr_exit(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) hsr_netlink_exit();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) hsr_debugfs_remove_root();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) unregister_netdevice_notifier(&hsr_nb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) module_init(hsr_init);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) module_exit(hsr_exit);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) MODULE_LICENSE("GPL");
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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