^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) // SPDX-License-Identifier: GPL-2.0-or-later
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) * Userspace interface
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) * Linux ethernet bridge
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) * Authors:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) * Lennert Buytenhek <buytenh@gnu.org>
^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/kernel.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) #include <linux/netdevice.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) #include <linux/etherdevice.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) #include <linux/netpoll.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) #include <linux/ethtool.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) #include <linux/if_arp.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) #include <linux/module.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) #include <linux/init.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) #include <linux/rtnetlink.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) #include <linux/if_ether.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) #include <linux/slab.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) #include <net/dsa.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) #include <net/sock.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) #include <linux/if_vlan.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) #include <net/switchdev.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) #include <net/net_namespace.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) #include "br_private.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) * Determine initial path cost based on speed.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) * using recommendations from 802.1d standard
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) * Since driver might sleep need to not be holding any locks.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) static int port_cost(struct net_device *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) struct ethtool_link_ksettings ecmd;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) if (!__ethtool_get_link_ksettings(dev, &ecmd)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) switch (ecmd.base.speed) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) case SPEED_10000:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) return 2;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) case SPEED_1000:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) return 4;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) case SPEED_100:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) return 19;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) case SPEED_10:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) return 100;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) /* Old silly heuristics based on name */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) if (!strncmp(dev->name, "lec", 3))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) return 7;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) if (!strncmp(dev->name, "plip", 4))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) return 2500;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) return 100; /* assume old 10Mbps */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) /* Check for port carrier transitions. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) void br_port_carrier_check(struct net_bridge_port *p, bool *notified)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) struct net_device *dev = p->dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) struct net_bridge *br = p->br;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) if (!(p->flags & BR_ADMIN_COST) &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) netif_running(dev) && netif_oper_up(dev))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) p->path_cost = port_cost(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) *notified = false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) if (!netif_running(br->dev))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) spin_lock_bh(&br->lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) if (netif_running(dev) && netif_oper_up(dev)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) if (p->state == BR_STATE_DISABLED) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) br_stp_enable_port(p);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) *notified = true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) if (p->state != BR_STATE_DISABLED) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) br_stp_disable_port(p);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) *notified = true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) spin_unlock_bh(&br->lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) static void br_port_set_promisc(struct net_bridge_port *p)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) int err = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) if (br_promisc_port(p))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) err = dev_set_promiscuity(p->dev, 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) br_fdb_unsync_static(p->br, p);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) p->flags |= BR_PROMISC;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) static void br_port_clear_promisc(struct net_bridge_port *p)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) int err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) /* Check if the port is already non-promisc or if it doesn't
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) * support UNICAST filtering. Without unicast filtering support
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) * we'll end up re-enabling promisc mode anyway, so just check for
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) * it here.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) if (!br_promisc_port(p) || !(p->dev->priv_flags & IFF_UNICAST_FLT))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) /* Since we'll be clearing the promisc mode, program the port
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) * first so that we don't have interruption in traffic.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) err = br_fdb_sync_static(p->br, p);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) dev_set_promiscuity(p->dev, -1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) p->flags &= ~BR_PROMISC;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) /* When a port is added or removed or when certain port flags
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) * change, this function is called to automatically manage
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) * promiscuity setting of all the bridge ports. We are always called
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) * under RTNL so can skip using rcu primitives.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) void br_manage_promisc(struct net_bridge *br)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) struct net_bridge_port *p;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) bool set_all = false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) /* If vlan filtering is disabled or bridge interface is placed
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) * into promiscuous mode, place all ports in promiscuous mode.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) if ((br->dev->flags & IFF_PROMISC) || !br_vlan_enabled(br->dev))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) set_all = true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) list_for_each_entry(p, &br->port_list, list) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) if (set_all) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) br_port_set_promisc(p);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) /* If the number of auto-ports is <= 1, then all other
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) * ports will have their output configuration
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) * statically specified through fdbs. Since ingress
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) * on the auto-port becomes forwarding/egress to other
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) * ports and egress configuration is statically known,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) * we can say that ingress configuration of the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) * auto-port is also statically known.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) * This lets us disable promiscuous mode and write
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) * this config to hw.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) if (br->auto_cnt == 0 ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) (br->auto_cnt == 1 && br_auto_port(p)))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) br_port_clear_promisc(p);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) br_port_set_promisc(p);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) int nbp_backup_change(struct net_bridge_port *p,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) struct net_device *backup_dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) struct net_bridge_port *old_backup = rtnl_dereference(p->backup_port);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) struct net_bridge_port *backup_p = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) ASSERT_RTNL();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) if (backup_dev) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) if (!netif_is_bridge_port(backup_dev))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) return -ENOENT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) backup_p = br_port_get_rtnl(backup_dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) if (backup_p->br != p->br)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) if (p == backup_p)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) if (old_backup == backup_p)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) /* if the backup link is already set, clear it */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) if (old_backup)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) old_backup->backup_redirected_cnt--;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) if (backup_p)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) backup_p->backup_redirected_cnt++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) rcu_assign_pointer(p->backup_port, backup_p);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) static void nbp_backup_clear(struct net_bridge_port *p)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) nbp_backup_change(p, NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) if (p->backup_redirected_cnt) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) struct net_bridge_port *cur_p;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) list_for_each_entry(cur_p, &p->br->port_list, list) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) struct net_bridge_port *backup_p;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) backup_p = rtnl_dereference(cur_p->backup_port);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) if (backup_p == p)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) nbp_backup_change(cur_p, NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) WARN_ON(rcu_access_pointer(p->backup_port) || p->backup_redirected_cnt);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) static void nbp_update_port_count(struct net_bridge *br)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) struct net_bridge_port *p;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) u32 cnt = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) list_for_each_entry(p, &br->port_list, list) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) if (br_auto_port(p))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) cnt++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) if (br->auto_cnt != cnt) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) br->auto_cnt = cnt;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) br_manage_promisc(br);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236) static void nbp_delete_promisc(struct net_bridge_port *p)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) /* If port is currently promiscuous, unset promiscuity.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) * Otherwise, it is a static port so remove all addresses
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240) * from it.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242) dev_set_allmulti(p->dev, -1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243) if (br_promisc_port(p))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244) dev_set_promiscuity(p->dev, -1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246) br_fdb_unsync_static(p->br, p);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249) static void release_nbp(struct kobject *kobj)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251) struct net_bridge_port *p
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252) = container_of(kobj, struct net_bridge_port, kobj);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253) kfree(p);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256) static void brport_get_ownership(struct kobject *kobj, kuid_t *uid, kgid_t *gid)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258) struct net_bridge_port *p = kobj_to_brport(kobj);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260) net_ns_get_ownership(dev_net(p->dev), uid, gid);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263) static struct kobj_type brport_ktype = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264) #ifdef CONFIG_SYSFS
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 265) .sysfs_ops = &brport_sysfs_ops,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 266) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 267) .release = release_nbp,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 268) .get_ownership = brport_get_ownership,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 269) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 270)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 271) static void destroy_nbp(struct net_bridge_port *p)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 272) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 273) struct net_device *dev = p->dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 274)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 275) p->br = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 276) p->dev = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 277) dev_put(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 278)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 279) kobject_put(&p->kobj);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 280) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 281)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 282) static void destroy_nbp_rcu(struct rcu_head *head)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 283) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 284) struct net_bridge_port *p =
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 285) container_of(head, struct net_bridge_port, rcu);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 286) destroy_nbp(p);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 287) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 288)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 289) static unsigned get_max_headroom(struct net_bridge *br)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 290) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 291) unsigned max_headroom = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 292) struct net_bridge_port *p;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 293)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 294) list_for_each_entry(p, &br->port_list, list) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 295) unsigned dev_headroom = netdev_get_fwd_headroom(p->dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 296)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 297) if (dev_headroom > max_headroom)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 298) max_headroom = dev_headroom;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 299) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 300)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 301) return max_headroom;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 302) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 303)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 304) static void update_headroom(struct net_bridge *br, int new_hr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 305) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 306) struct net_bridge_port *p;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 307)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 308) list_for_each_entry(p, &br->port_list, list)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 309) netdev_set_rx_headroom(p->dev, new_hr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 310)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 311) br->dev->needed_headroom = new_hr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 312) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 313)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 314) /* Delete port(interface) from bridge is done in two steps.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 315) * via RCU. First step, marks device as down. That deletes
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 316) * all the timers and stops new packets from flowing through.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 317) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 318) * Final cleanup doesn't occur until after all CPU's finished
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 319) * processing packets.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 320) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 321) * Protected from multiple admin operations by RTNL mutex
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 322) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 323) static void del_nbp(struct net_bridge_port *p)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 324) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 325) struct net_bridge *br = p->br;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 326) struct net_device *dev = p->dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 327)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 328) sysfs_remove_link(br->ifobj, p->dev->name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 329)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 330) nbp_delete_promisc(p);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 331)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 332) spin_lock_bh(&br->lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 333) br_stp_disable_port(p);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 334) spin_unlock_bh(&br->lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 335)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 336) br_mrp_port_del(br, p);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 337)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 338) br_ifinfo_notify(RTM_DELLINK, NULL, p);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 339)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 340) list_del_rcu(&p->list);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 341) if (netdev_get_fwd_headroom(dev) == br->dev->needed_headroom)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 342) update_headroom(br, get_max_headroom(br));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 343) netdev_reset_rx_headroom(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 344)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 345) nbp_vlan_flush(p);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 346) br_fdb_delete_by_port(br, p, 0, 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 347) switchdev_deferred_process();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 348) nbp_backup_clear(p);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 349)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 350) nbp_update_port_count(br);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 351)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 352) netdev_upper_dev_unlink(dev, br->dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 353)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 354) dev->priv_flags &= ~IFF_BRIDGE_PORT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 355)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 356) netdev_rx_handler_unregister(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 357)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 358) br_multicast_del_port(p);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 359)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 360) kobject_uevent(&p->kobj, KOBJ_REMOVE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 361) kobject_del(&p->kobj);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 362)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 363) br_netpoll_disable(p);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 364)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 365) call_rcu(&p->rcu, destroy_nbp_rcu);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 366) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 367)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 368) /* Delete bridge device */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 369) void br_dev_delete(struct net_device *dev, struct list_head *head)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 370) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 371) struct net_bridge *br = netdev_priv(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 372) struct net_bridge_port *p, *n;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 373)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 374) list_for_each_entry_safe(p, n, &br->port_list, list) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 375) del_nbp(p);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 376) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 377)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 378) br_recalculate_neigh_suppress_enabled(br);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 379)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 380) br_fdb_delete_by_port(br, NULL, 0, 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 381)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 382) cancel_delayed_work_sync(&br->gc_work);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 383)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 384) br_sysfs_delbr(br->dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 385) unregister_netdevice_queue(br->dev, head);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 386) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 387)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 388) /* find an available port number */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 389) static int find_portno(struct net_bridge *br)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 390) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 391) int index;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 392) struct net_bridge_port *p;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 393) unsigned long *inuse;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 394)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 395) inuse = bitmap_zalloc(BR_MAX_PORTS, GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 396) if (!inuse)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 397) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 398)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 399) set_bit(0, inuse); /* zero is reserved */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 400) list_for_each_entry(p, &br->port_list, list) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 401) set_bit(p->port_no, inuse);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 402) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 403) index = find_first_zero_bit(inuse, BR_MAX_PORTS);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 404) bitmap_free(inuse);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 405)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 406) return (index >= BR_MAX_PORTS) ? -EXFULL : index;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 407) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 408)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 409) /* called with RTNL but without bridge lock */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 410) static struct net_bridge_port *new_nbp(struct net_bridge *br,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 411) struct net_device *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 412) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 413) struct net_bridge_port *p;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 414) int index, err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 415)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 416) index = find_portno(br);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 417) if (index < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 418) return ERR_PTR(index);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 419)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 420) p = kzalloc(sizeof(*p), GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 421) if (p == NULL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 422) return ERR_PTR(-ENOMEM);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 423)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 424) p->br = br;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 425) dev_hold(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 426) p->dev = dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 427) p->path_cost = port_cost(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 428) p->priority = 0x8000 >> BR_PORT_BITS;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 429) p->port_no = index;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 430) p->flags = BR_LEARNING | BR_FLOOD | BR_MCAST_FLOOD | BR_BCAST_FLOOD;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 431) br_init_port(p);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 432) br_set_state(p, BR_STATE_DISABLED);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 433) br_stp_port_timer_init(p);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 434) err = br_multicast_add_port(p);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 435) if (err) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 436) dev_put(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 437) kfree(p);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 438) p = ERR_PTR(err);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 439) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 440)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 441) return p;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 442) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 443)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 444) int br_add_bridge(struct net *net, const char *name)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 445) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 446) struct net_device *dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 447) int res;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 448)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 449) dev = alloc_netdev(sizeof(struct net_bridge), name, NET_NAME_UNKNOWN,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 450) br_dev_setup);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 451)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 452) if (!dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 453) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 454)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 455) dev_net_set(dev, net);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 456) dev->rtnl_link_ops = &br_link_ops;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 457)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 458) res = register_netdev(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 459) if (res)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 460) free_netdev(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 461) return res;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 462) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 463)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 464) int br_del_bridge(struct net *net, const char *name)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 465) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 466) struct net_device *dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 467) int ret = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 468)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 469) rtnl_lock();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 470) dev = __dev_get_by_name(net, name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 471) if (dev == NULL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 472) ret = -ENXIO; /* Could not find device */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 473)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 474) else if (!(dev->priv_flags & IFF_EBRIDGE)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 475) /* Attempt to delete non bridge device! */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 476) ret = -EPERM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 477) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 478)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 479) else if (dev->flags & IFF_UP) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 480) /* Not shutdown yet. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 481) ret = -EBUSY;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 482) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 483)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 484) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 485) br_dev_delete(dev, NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 486)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 487) rtnl_unlock();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 488) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 489) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 490)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 491) /* MTU of the bridge pseudo-device: ETH_DATA_LEN or the minimum of the ports */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 492) static int br_mtu_min(const struct net_bridge *br)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 493) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 494) const struct net_bridge_port *p;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 495) int ret_mtu = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 496)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 497) list_for_each_entry(p, &br->port_list, list)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 498) if (!ret_mtu || ret_mtu > p->dev->mtu)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 499) ret_mtu = p->dev->mtu;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 500)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 501) return ret_mtu ? ret_mtu : ETH_DATA_LEN;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 502) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 503)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 504) void br_mtu_auto_adjust(struct net_bridge *br)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 505) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 506) ASSERT_RTNL();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 507)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 508) /* if the bridge MTU was manually configured don't mess with it */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 509) if (br_opt_get(br, BROPT_MTU_SET_BY_USER))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 510) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 511)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 512) /* change to the minimum MTU and clear the flag which was set by
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 513) * the bridge ndo_change_mtu callback
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 514) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 515) dev_set_mtu(br->dev, br_mtu_min(br));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 516) br_opt_toggle(br, BROPT_MTU_SET_BY_USER, false);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 517) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 518)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 519) static void br_set_gso_limits(struct net_bridge *br)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 520) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 521) unsigned int gso_max_size = GSO_MAX_SIZE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 522) u16 gso_max_segs = GSO_MAX_SEGS;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 523) const struct net_bridge_port *p;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 524)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 525) list_for_each_entry(p, &br->port_list, list) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 526) gso_max_size = min(gso_max_size, p->dev->gso_max_size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 527) gso_max_segs = min(gso_max_segs, p->dev->gso_max_segs);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 528) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 529) br->dev->gso_max_size = gso_max_size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 530) br->dev->gso_max_segs = gso_max_segs;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 531) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 532)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 533) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 534) * Recomputes features using slave's features
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 535) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 536) netdev_features_t br_features_recompute(struct net_bridge *br,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 537) netdev_features_t features)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 538) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 539) struct net_bridge_port *p;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 540) netdev_features_t mask;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 541)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 542) if (list_empty(&br->port_list))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 543) return features;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 544)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 545) mask = features;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 546) features &= ~NETIF_F_ONE_FOR_ALL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 547)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 548) list_for_each_entry(p, &br->port_list, list) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 549) features = netdev_increment_features(features,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 550) p->dev->features, mask);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 551) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 552) features = netdev_add_tso_features(features, mask);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 553)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 554) return features;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 555) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 556)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 557) /* called with RTNL */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 558) int br_add_if(struct net_bridge *br, struct net_device *dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 559) struct netlink_ext_ack *extack)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 560) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 561) struct net_bridge_port *p;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 562) int err = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 563) unsigned br_hr, dev_hr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 564) bool changed_addr, fdb_synced = false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 565)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 566) /* Don't allow bridging non-ethernet like devices. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 567) if ((dev->flags & IFF_LOOPBACK) ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 568) dev->type != ARPHRD_ETHER || dev->addr_len != ETH_ALEN ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 569) !is_valid_ether_addr(dev->dev_addr))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 570) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 571)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 572) /* Also don't allow bridging of net devices that are DSA masters, since
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 573) * the bridge layer rx_handler prevents the DSA fake ethertype handler
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 574) * to be invoked, so we don't get the chance to strip off and parse the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 575) * DSA switch tag protocol header (the bridge layer just returns
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 576) * RX_HANDLER_CONSUMED, stopping RX processing for these frames).
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 577) * The only case where that would not be an issue is when bridging can
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 578) * already be offloaded, such as when the DSA master is itself a DSA
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 579) * or plain switchdev port, and is bridged only with other ports from
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 580) * the same hardware device.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 581) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 582) if (netdev_uses_dsa(dev)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 583) list_for_each_entry(p, &br->port_list, list) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 584) if (!netdev_port_same_parent_id(dev, p->dev)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 585) NL_SET_ERR_MSG(extack,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 586) "Cannot do software bridging with a DSA master");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 587) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 588) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 589) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 590) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 591)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 592) /* No bridging of bridges */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 593) if (dev->netdev_ops->ndo_start_xmit == br_dev_xmit) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 594) NL_SET_ERR_MSG(extack,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 595) "Can not enslave a bridge to a bridge");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 596) return -ELOOP;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 597) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 598)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 599) /* Device has master upper dev */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 600) if (netdev_master_upper_dev_get(dev))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 601) return -EBUSY;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 602)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 603) /* No bridging devices that dislike that (e.g. wireless) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 604) if (dev->priv_flags & IFF_DONT_BRIDGE) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 605) NL_SET_ERR_MSG(extack,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 606) "Device does not allow enslaving to a bridge");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 607) return -EOPNOTSUPP;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 608) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 609)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 610) p = new_nbp(br, dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 611) if (IS_ERR(p))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 612) return PTR_ERR(p);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 613)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 614) call_netdevice_notifiers(NETDEV_JOIN, dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 615)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 616) err = dev_set_allmulti(dev, 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 617) if (err) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 618) br_multicast_del_port(p);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 619) kfree(p); /* kobject not yet init'd, manually free */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 620) goto err1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 621) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 622)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 623) err = kobject_init_and_add(&p->kobj, &brport_ktype, &(dev->dev.kobj),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 624) SYSFS_BRIDGE_PORT_ATTR);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 625) if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 626) goto err2;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 627)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 628) err = br_sysfs_addif(p);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 629) if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 630) goto err2;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 631)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 632) err = br_netpoll_enable(p);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 633) if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 634) goto err3;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 635)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 636) err = netdev_rx_handler_register(dev, br_get_rx_handler(dev), p);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 637) if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 638) goto err4;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 639)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 640) dev->priv_flags |= IFF_BRIDGE_PORT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 641)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 642) err = netdev_master_upper_dev_link(dev, br->dev, NULL, NULL, extack);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 643) if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 644) goto err5;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 645)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 646) err = nbp_switchdev_mark_set(p);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 647) if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 648) goto err6;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 649)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 650) dev_disable_lro(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 651)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 652) list_add_rcu(&p->list, &br->port_list);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 653)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 654) nbp_update_port_count(br);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 655) if (!br_promisc_port(p) && (p->dev->priv_flags & IFF_UNICAST_FLT)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 656) /* When updating the port count we also update all ports'
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 657) * promiscuous mode.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 658) * A port leaving promiscuous mode normally gets the bridge's
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 659) * fdb synced to the unicast filter (if supported), however,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 660) * `br_port_clear_promisc` does not distinguish between
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 661) * non-promiscuous ports and *new* ports, so we need to
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 662) * sync explicitly here.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 663) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 664) fdb_synced = br_fdb_sync_static(br, p) == 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 665) if (!fdb_synced)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 666) netdev_err(dev, "failed to sync bridge static fdb addresses to this port\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 667) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 668)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 669) netdev_update_features(br->dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 670)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 671) br_hr = br->dev->needed_headroom;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 672) dev_hr = netdev_get_fwd_headroom(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 673) if (br_hr < dev_hr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 674) update_headroom(br, dev_hr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 675) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 676) netdev_set_rx_headroom(dev, br_hr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 677)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 678) if (br_fdb_insert(br, p, dev->dev_addr, 0))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 679) netdev_err(dev, "failed insert local address bridge forwarding table\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 680)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 681) if (br->dev->addr_assign_type != NET_ADDR_SET) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 682) /* Ask for permission to use this MAC address now, even if we
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 683) * don't end up choosing it below.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 684) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 685) err = dev_pre_changeaddr_notify(br->dev, dev->dev_addr, extack);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 686) if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 687) goto err7;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 688) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 689)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 690) err = nbp_vlan_init(p, extack);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 691) if (err) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 692) netdev_err(dev, "failed to initialize vlan filtering on this port\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 693) goto err7;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 694) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 695)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 696) spin_lock_bh(&br->lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 697) changed_addr = br_stp_recalculate_bridge_id(br);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 698)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 699) if (netif_running(dev) && netif_oper_up(dev) &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 700) (br->dev->flags & IFF_UP))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 701) br_stp_enable_port(p);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 702) spin_unlock_bh(&br->lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 703)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 704) br_ifinfo_notify(RTM_NEWLINK, NULL, p);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 705)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 706) if (changed_addr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 707) call_netdevice_notifiers(NETDEV_CHANGEADDR, br->dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 708)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 709) br_mtu_auto_adjust(br);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 710) br_set_gso_limits(br);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 711)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 712) kobject_uevent(&p->kobj, KOBJ_ADD);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 713)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 714) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 715)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 716) err7:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 717) if (fdb_synced)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 718) br_fdb_unsync_static(br, p);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 719) list_del_rcu(&p->list);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 720) br_fdb_delete_by_port(br, p, 0, 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 721) nbp_update_port_count(br);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 722) err6:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 723) netdev_upper_dev_unlink(dev, br->dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 724) err5:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 725) dev->priv_flags &= ~IFF_BRIDGE_PORT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 726) netdev_rx_handler_unregister(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 727) err4:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 728) br_netpoll_disable(p);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 729) err3:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 730) sysfs_remove_link(br->ifobj, p->dev->name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 731) err2:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 732) br_multicast_del_port(p);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 733) kobject_put(&p->kobj);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 734) dev_set_allmulti(dev, -1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 735) err1:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 736) dev_put(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 737) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 738) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 739)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 740) /* called with RTNL */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 741) int br_del_if(struct net_bridge *br, struct net_device *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 742) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 743) struct net_bridge_port *p;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 744) bool changed_addr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 745)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 746) p = br_port_get_rtnl(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 747) if (!p || p->br != br)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 748) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 749)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 750) /* Since more than one interface can be attached to a bridge,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 751) * there still maybe an alternate path for netconsole to use;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 752) * therefore there is no reason for a NETDEV_RELEASE event.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 753) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 754) del_nbp(p);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 755)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 756) br_mtu_auto_adjust(br);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 757) br_set_gso_limits(br);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 758)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 759) spin_lock_bh(&br->lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 760) changed_addr = br_stp_recalculate_bridge_id(br);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 761) spin_unlock_bh(&br->lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 762)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 763) if (changed_addr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 764) call_netdevice_notifiers(NETDEV_CHANGEADDR, br->dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 765)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 766) netdev_update_features(br->dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 767)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 768) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 769) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 770)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 771) void br_port_flags_change(struct net_bridge_port *p, unsigned long mask)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 772) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 773) struct net_bridge *br = p->br;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 774)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 775) if (mask & BR_AUTO_MASK)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 776) nbp_update_port_count(br);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 777)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 778) if (mask & BR_NEIGH_SUPPRESS)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 779) br_recalculate_neigh_suppress_enabled(br);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 780) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 781)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 782) bool br_port_flag_is_set(const struct net_device *dev, unsigned long flag)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 783) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 784) struct net_bridge_port *p;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 785)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 786) p = br_port_get_rtnl_rcu(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 787) if (!p)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 788) return false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 789)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 790) return p->flags & flag;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 791) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 792) EXPORT_SYMBOL_GPL(br_port_flag_is_set);
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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