diff options
Diffstat (limited to 'drivers/net/bonding/bond_main.c')
| -rw-r--r-- | drivers/net/bonding/bond_main.c | 629 |
1 files changed, 326 insertions, 303 deletions
diff --git a/drivers/net/bonding/bond_main.c b/drivers/net/bonding/bond_main.c index 798ae69fb63c..c9ac06cfe6b7 100644 --- a/drivers/net/bonding/bond_main.c +++ b/drivers/net/bonding/bond_main.c @@ -208,6 +208,9 @@ static int lacp_fast; static int bond_init(struct net_device *bond_dev); static void bond_uninit(struct net_device *bond_dev); +static struct rtnl_link_stats64 *bond_get_stats(struct net_device *bond_dev, + struct rtnl_link_stats64 *stats); +static void bond_slave_arr_handler(struct work_struct *work); /*---------------------------- General routines -----------------------------*/ @@ -253,8 +256,7 @@ void bond_dev_queue_xmit(struct bonding *bond, struct sk_buff *skb, dev_queue_xmit(skb); } -/* - * In the following 2 functions, bond_vlan_rx_add_vid and bond_vlan_rx_kill_vid, +/* In the following 2 functions, bond_vlan_rx_add_vid and bond_vlan_rx_kill_vid, * We don't protect the slave list iteration with a lock because: * a. This operation is performed in IOCTL context, * b. The operation is protected by the RTNL semaphore in the 8021q code, @@ -326,8 +328,7 @@ static int bond_vlan_rx_kill_vid(struct net_device *bond_dev, /*------------------------------- Link status -------------------------------*/ -/* - * Set the carrier state for the master according to the state of its +/* Set the carrier state for the master according to the state of its * slaves. If any slaves are up, the master is up. In 802.3ad mode, * do special 802.3ad magic. * @@ -362,8 +363,7 @@ down: return 0; } -/* - * Get link speed and duplex from the slave's base driver +/* Get link speed and duplex from the slave's base driver * using ethtool. If for some reason the call fails or the * values are invalid, set speed and duplex to -1, * and return. @@ -416,8 +416,7 @@ const char *bond_slave_link_status(s8 link) } } -/* - * if <dev> supports MII link status reporting, check its link status. +/* if <dev> supports MII link status reporting, check its link status. * * We either do MII/ETHTOOL ioctls, or check netif_carrier_ok(), * depending upon the setting of the use_carrier parameter. @@ -454,14 +453,14 @@ static int bond_check_dev_link(struct bonding *bond, /* Ethtool can't be used, fallback to MII ioctls. */ ioctl = slave_ops->ndo_do_ioctl; if (ioctl) { - /* TODO: set pointer to correct ioctl on a per team member */ - /* bases to make this more efficient. that is, once */ - /* we determine the correct ioctl, we will always */ - /* call it and not the others for that team */ - /* member. */ - - /* - * We cannot assume that SIOCGMIIPHY will also read a + /* TODO: set pointer to correct ioctl on a per team member + * bases to make this more efficient. that is, once + * we determine the correct ioctl, we will always + * call it and not the others for that team + * member. + */ + + /* We cannot assume that SIOCGMIIPHY will also read a * register; not all network drivers (e.g., e100) * support that. */ @@ -476,8 +475,7 @@ static int bond_check_dev_link(struct bonding *bond, } } - /* - * If reporting, report that either there's no dev->do_ioctl, + /* If reporting, report that either there's no dev->do_ioctl, * or both SIOCGMIIREG and get_link failed (meaning that we * cannot report link status). If not reporting, pretend * we're ok. @@ -487,9 +485,7 @@ static int bond_check_dev_link(struct bonding *bond, /*----------------------------- Multicast list ------------------------------*/ -/* - * Push the promiscuity flag down to appropriate slaves - */ +/* Push the promiscuity flag down to appropriate slaves */ static int bond_set_promiscuity(struct bonding *bond, int inc) { struct list_head *iter; @@ -512,9 +508,7 @@ static int bond_set_promiscuity(struct bonding *bond, int inc) return err; } -/* - * Push the allmulti flag down to all slaves - */ +/* Push the allmulti flag down to all slaves */ static int bond_set_allmulti(struct bonding *bond, int inc) { struct list_head *iter; @@ -537,8 +531,7 @@ static int bond_set_allmulti(struct bonding *bond, int inc) return err; } -/* - * Retrieve the list of registered multicast addresses for the bonding +/* Retrieve the list of registered multicast addresses for the bonding * device and retransmit an IGMP JOIN request to the current active * slave. */ @@ -560,8 +553,7 @@ static void bond_resend_igmp_join_requests_delayed(struct work_struct *work) rtnl_unlock(); } -/* Flush bond's hardware addresses from slave - */ +/* Flush bond's hardware addresses from slave */ static void bond_hw_addr_flush(struct net_device *bond_dev, struct net_device *slave_dev) { @@ -588,8 +580,6 @@ static void bond_hw_addr_flush(struct net_device *bond_dev, static void bond_hw_addr_swap(struct bonding *bond, struct slave *new_active, struct slave *old_active) { - ASSERT_RTNL(); - if (old_active) { if (bond->dev->flags & IFF_PROMISC) dev_set_promiscuity(old_active->dev, -1); @@ -632,18 +622,15 @@ static void bond_set_dev_addr(struct net_device *bond_dev, call_netdevice_notifiers(NETDEV_CHANGEADDR, bond_dev); } -/* - * bond_do_fail_over_mac +/* bond_do_fail_over_mac * * Perform special MAC address swapping for fail_over_mac settings * - * Called with RTNL, curr_slave_lock for write_bh. + * Called with RTNL */ static void bond_do_fail_over_mac(struct bonding *bond, struct slave *new_active, struct slave *old_active) - __releases(&bond->curr_slave_lock) - __acquires(&bond->curr_slave_lock) { u8 tmp_mac[ETH_ALEN]; struct sockaddr saddr; @@ -651,23 +638,17 @@ static void bond_do_fail_over_mac(struct bonding *bond, switch (bond->params.fail_over_mac) { case BOND_FOM_ACTIVE: - if (new_active) { - write_unlock_bh(&bond->curr_slave_lock); + if (new_active) bond_set_dev_addr(bond->dev, new_active->dev); - write_lock_bh(&bond->curr_slave_lock); - } break; case BOND_FOM_FOLLOW: - /* - * if new_active && old_active, swap them + /* if new_active && old_active, swap them * if just old_active, do nothing (going to no active slave) * if just new_active, set new_active to bond's MAC */ if (!new_active) return; - write_unlock_bh(&bond->curr_slave_lock); - if (old_active) { ether_addr_copy(tmp_mac, new_active->dev->dev_addr); ether_addr_copy(saddr.sa_data, @@ -696,7 +677,6 @@ static void bond_do_fail_over_mac(struct bonding *bond, netdev_err(bond->dev, "Error %d setting MAC of slave %s\n", -rv, new_active->dev->name); out: - write_lock_bh(&bond->curr_slave_lock); break; default: netdev_err(bond->dev, "bond_do_fail_over_mac impossible: bad policy %d\n", @@ -708,8 +688,8 @@ out: static bool bond_should_change_active(struct bonding *bond) { - struct slave *prim = bond->primary_slave; - struct slave *curr = bond_deref_active_protected(bond); + struct slave *prim = rtnl_dereference(bond->primary_slave); + struct slave *curr = rtnl_dereference(bond->curr_active_slave); if (!prim || !curr || curr->link != BOND_LINK_UP) return true; @@ -732,13 +712,14 @@ static bool bond_should_change_active(struct bonding *bond) */ static struct slave *bond_find_best_slave(struct bonding *bond) { - struct slave *slave, *bestslave = NULL; + struct slave *slave, *bestslave = NULL, *primary; struct list_head *iter; int mintime = bond->params.updelay; - if (bond->primary_slave && bond->primary_slave->link == BOND_LINK_UP && + primary = rtnl_dereference(bond->primary_slave); + if (primary && primary->link == BOND_LINK_UP && bond_should_change_active(bond)) - return bond->primary_slave; + return primary; bond_for_each_slave(bond, slave, iter) { if (slave->link == BOND_LINK_UP) @@ -784,15 +765,15 @@ static bool bond_should_notify_peers(struct bonding *bond) * because it is apparently the best available slave we have, even though its * updelay hasn't timed out yet. * - * If new_active is not NULL, caller must hold curr_slave_lock for write_bh. + * Caller must hold RTNL. */ void bond_change_active_slave(struct bonding *bond, struct slave *new_active) { struct slave *old_active; - old_active = rcu_dereference_protected(bond->curr_active_slave, - !new_active || - lockdep_is_held(&bond->curr_slave_lock)); + ASSERT_RTNL(); + + old_active = rtnl_dereference(bond->curr_active_slave); if (old_active == new_active) return; @@ -860,21 +841,18 @@ void bond_change_active_slave(struct bonding *bond, struct slave *new_active) bond_should_notify_peers(bond); } - write_unlock_bh(&bond->curr_slave_lock); - call_netdevice_notifiers(NETDEV_BONDING_FAILOVER, bond->dev); if (should_notify_peers) call_netdevice_notifiers(NETDEV_NOTIFY_PEERS, bond->dev); - - write_lock_bh(&bond->curr_slave_lock); } } /* resend IGMP joins since active slave has changed or * all were sent on curr_active_slave. * resend only if bond is brought up with the affected - * bonding modes and the retransmission is enabled */ + * bonding modes and the retransmission is enabled + */ if (netif_running(bond->dev) && (bond->params.resend_igmp > 0) && ((bond_uses_primary(bond) && new_active) || BOND_MODE(bond) == BOND_MODE_ROUNDROBIN)) { @@ -892,15 +870,17 @@ void bond_change_active_slave(struct bonding *bond, struct slave *new_active) * - The primary_slave has got its link back. * - A slave has got its link back and there's no old curr_active_slave. * - * Caller must hold curr_slave_lock for write_bh. + * Caller must hold RTNL. */ void bond_select_active_slave(struct bonding *bond) { struct slave *best_slave; int rv; + ASSERT_RTNL(); + best_slave = bond_find_best_slave(bond); - if (best_slave != bond_deref_active_protected(bond)) { + if (best_slave != rtnl_dereference(bond->curr_active_slave)) { bond_change_active_slave(bond, best_slave); rv = bond_set_carrier(bond); if (!rv) @@ -1022,7 +1002,8 @@ static netdev_features_t bond_fix_features(struct net_device *dev, static void bond_compute_features(struct bonding *bond) { - unsigned int flags, dst_release_flag = IFF_XMIT_DST_RELEASE; + unsigned int dst_release_flag = IFF_XMIT_DST_RELEASE | + IFF_XMIT_DST_RELEASE_PERM; netdev_features_t vlan_features = BOND_VLAN_FEATURES; netdev_features_t enc_features = BOND_ENC_FEATURES; struct net_device *bond_dev = bond->dev; @@ -1058,8 +1039,10 @@ done: bond_dev->gso_max_segs = gso_max_segs; netif_set_gso_max_size(bond_dev, gso_max_size); - flags = bond_dev->priv_flags & ~IFF_XMIT_DST_RELEASE; - bond_dev->priv_flags = flags | dst_release_flag; + bond_dev->priv_flags &= ~IFF_XMIT_DST_RELEASE; + if ((bond_dev->priv_flags & IFF_XMIT_DST_RELEASE_PERM) && + dst_release_flag == (IFF_XMIT_DST_RELEASE | IFF_XMIT_DST_RELEASE_PERM)) + bond_dev->priv_flags |= IFF_XMIT_DST_RELEASE; netdev_change_features(bond_dev); } @@ -1240,8 +1223,7 @@ int bond_enslave(struct net_device *bond_dev, struct net_device *slave_dev) slave_dev->name); } - /* - * Old ifenslave binaries are no longer supported. These can + /* Old ifenslave binaries are no longer supported. These can * be identified with moderate accuracy by the state of the slave: * the current ifenslave will set the interface down prior to * enslaving it; the old ifenslave will not. @@ -1313,7 +1295,8 @@ int bond_enslave(struct net_device *bond_dev, struct net_device *slave_dev) call_netdevice_notifiers(NETDEV_JOIN, slave_dev); /* If this is the first slave, then we need to set the master's hardware - * address to be the same as the slave's. */ + * address to be the same as the slave's. + */ if (!bond_has_slaves(bond) && bond->dev->addr_assign_type == NET_ADDR_RANDOM) bond_set_dev_addr(bond->dev, slave_dev); @@ -1326,8 +1309,7 @@ int bond_enslave(struct net_device *bond_dev, struct net_device *slave_dev) new_slave->bond = bond; new_slave->dev = slave_dev; - /* - * Set the new_slave's queue_id to be zero. Queue ID mapping + /* Set the new_slave's queue_id to be zero. Queue ID mapping * is set via sysfs or module option if desired. */ new_slave->queue_id = 0; @@ -1340,8 +1322,7 @@ int bond_enslave(struct net_device *bond_dev, struct net_device *slave_dev) goto err_free; } - /* - * Save slave's original ("permanent") mac address for modes + /* Save slave's original ("permanent") mac address for modes * that need it, and for restoring it upon release, and then * set it to the master's address */ @@ -1349,8 +1330,7 @@ int bond_enslave(struct net_device *bond_dev, struct net_device *slave_dev) if (!bond->params.fail_over_mac || BOND_MODE(bond) != BOND_MODE_ACTIVEBACKUP) { - /* - * Set slave to master's mac address. The application already + /* Set slave to master's mac address. The application already * set the master's mac address to that of the first slave */ memcpy(addr.sa_data, bond_dev->dev_addr, bond_dev->addr_len); @@ -1370,6 +1350,8 @@ int bond_enslave(struct net_device *bond_dev, struct net_device *slave_dev) } slave_dev->priv_flags |= IFF_BONDING; + /* initialize slave stats */ + dev_get_stats(new_slave->dev, &new_slave->slave_stats); if (bond_is_lb(bond)) { /* bond_alb_init_slave() must be called before all other stages since @@ -1436,8 +1418,7 @@ int bond_enslave(struct net_device *bond_dev, struct net_device *slave_dev) link_reporting = bond_check_dev_link(bond, slave_dev, 1); if ((link_reporting == -1) && !bond->params.arp_interval) { - /* - * miimon is set but a bonded network driver + /* miimon is set but a bonded network driver * does not support ETHTOOL/MII and * arp_interval is not set. Note: if * use_carrier is enabled, we will never go @@ -1482,7 +1463,7 @@ int bond_enslave(struct net_device *bond_dev, struct net_device *slave_dev) if (bond_uses_primary(bond) && bond->params.primary[0]) { /* if there is a primary slave, remember it */ if (strcmp(bond->params.primary, new_slave->dev->name) == 0) { - bond->primary_slave = new_slave; + rcu_assign_pointer(bond->primary_slave, new_slave); bond->force_primary = true; } } @@ -1570,12 +1551,13 @@ int bond_enslave(struct net_device *bond_dev, struct net_device *slave_dev) if (bond_uses_primary(bond)) { block_netpoll_tx(); - write_lock_bh(&bond->curr_slave_lock); bond_select_active_slave(bond); - write_unlock_bh(&bond->curr_slave_lock); unblock_netpoll_tx(); } + if (bond_mode_uses_xmit_hash(bond)) + bond_update_slave_arr(bond, NULL); + netdev_info(bond_dev, "Enslaving %s as %s interface with %s link\n", slave_dev->name, bond_is_active_slave(new_slave) ? "an active" : "a backup", @@ -1596,16 +1578,16 @@ err_detach: bond_hw_addr_flush(bond_dev, slave_dev); vlan_vids_del_by_dev(slave_dev, bond_dev); - if (bond->primary_slave == new_slave) - bond->primary_slave = NULL; + if (rcu_access_pointer(bond->primary_slave) == new_slave) + RCU_INIT_POINTER(bond->primary_slave, NULL); if (rcu_access_pointer(bond->curr_active_slave) == new_slave) { block_netpoll_tx(); - write_lock_bh(&bond->curr_slave_lock); bond_change_active_slave(bond, NULL); bond_select_active_slave(bond); - write_unlock_bh(&bond->curr_slave_lock); unblock_netpoll_tx(); } + /* either primary_slave or curr_active_slave might've changed */ + synchronize_rcu(); slave_disable_netpoll(new_slave); err_close: @@ -1639,10 +1621,9 @@ err_undo_flags: return res; } -/* - * Try to release the slave device <slave> from the bond device <master> +/* Try to release the slave device <slave> from the bond device <master> * It is legal to access curr_active_slave without a lock because all the function - * is write-locked. If "all" is true it means that the function is being called + * is RTNL-locked. If "all" is true it means that the function is being called * while destroying a bond interface and all slaves are being released. * * The rules for slave state should be: @@ -1682,18 +1663,20 @@ static int __bond_release_one(struct net_device *bond_dev, bond_sysfs_slave_del(slave); + /* recompute stats just before removing the slave */ + bond_get_stats(bond->dev, &bond->bond_stats); + bond_upper_dev_unlink(bond_dev, slave_dev); /* unregister rx_handler early so bond_handle_frame wouldn't be called * for this slave anymore. */ netdev_rx_handler_unregister(slave_dev); - write_lock_bh(&bond->lock); - /* Inform AD package of unbinding of slave. */ if (BOND_MODE(bond) == BOND_MODE_8023AD) bond_3ad_unbind_slave(slave); - write_unlock_bh(&bond->lock); + if (bond_mode_uses_xmit_hash(bond)) + bond_update_slave_arr(bond, slave); netdev_info(bond_dev, "Releasing %s interface %s\n", bond_is_active_slave(slave) ? "active" : "backup", @@ -1712,14 +1695,11 @@ static int __bond_release_one(struct net_device *bond_dev, bond_dev->name, slave_dev->name); } - if (bond->primary_slave == slave) - bond->primary_slave = NULL; + if (rtnl_dereference(bond->primary_slave) == slave) + RCU_INIT_POINTER(bond->primary_slave, NULL); - if (oldcurrent == slave) { - write_lock_bh(&bond->curr_slave_lock); + if (oldcurrent == slave) bond_change_active_slave(bond, NULL); - write_unlock_bh(&bond->curr_slave_lock); - } if (bond_is_lb(bond)) { /* Must be called only after the slave has been @@ -1733,16 +1713,11 @@ static int __bond_release_one(struct net_device *bond_dev, if (all) { RCU_INIT_POINTER(bond->curr_active_slave, NULL); } else if (oldcurrent == slave) { - /* - * Note that we hold RTNL over this sequence, so there + /* Note that we hold RTNL over this sequence, so there * is no concern that another slave add/remove event * will interfere. */ - write_lock_bh(&bond->curr_slave_lock); - bond_select_active_slave(bond); - - write_unlock_bh(&bond->curr_slave_lock); } if (!bond_has_slaves(bond)) { @@ -1765,10 +1740,9 @@ static int __bond_release_one(struct net_device *bond_dev, netdev_info(bond_dev, "last VLAN challenged slave %s left bond %s - VLAN blocking is removed\n", slave_dev->name, bond_dev->name); - /* must do this from outside any spinlocks */ vlan_vids_del_by_dev(slave_dev, bond_dev); - /* If the mode uses primary, then this cases was handled above by + /* If the mode uses primary, then this case was handled above by * bond_change_active_slave(..., NULL) */ if (!bond_uses_primary(bond)) { @@ -1808,7 +1782,7 @@ static int __bond_release_one(struct net_device *bond_dev, bond_free_slave(slave); - return 0; /* deletion OK */ + return 0; } /* A wrapper used because of ndo_del_link */ @@ -1817,10 +1791,9 @@ int bond_release(struct net_device *bond_dev, struct net_device *slave_dev) return __bond_release_one(bond_dev, slave_dev, false); } -/* -* First release a slave and then destroy the bond if no more slaves are left. -* Must be under rtnl_lock when this function is called. -*/ +/* First release a slave and then destroy the bond if no more slaves are left. + * Must be under rtnl_lock when this function is called. + */ static int bond_release_and_destroy(struct net_device *bond_dev, struct net_device *slave_dev) { @@ -1843,7 +1816,6 @@ static int bond_info_query(struct net_device *bond_dev, struct ifbond *info) info->bond_mode = BOND_MODE(bond); info->miimon = bond->params.miimon; - info->num_slaves = bond->slave_cnt; return 0; @@ -1906,9 +1878,7 @@ static int bond_miimon_inspect(struct bonding *bond) /*FALLTHRU*/ case BOND_LINK_FAIL: if (link_state) { - /* - * recovered before downdelay expired - */ + /* recovered before downdelay expired */ slave->link = BOND_LINK_UP; slave->last_link_up = jiffies; netdev_info(bond->dev, "link status up again after %d ms for interface %s\n", @@ -1974,7 +1944,7 @@ static int bond_miimon_inspect(struct bonding *bond) static void bond_miimon_commit(struct bonding *bond) { struct list_head *iter; - struct slave *slave; + struct slave *slave, *primary; bond_for_each_slave(bond, slave, iter) { switch (slave->new_link) { @@ -1985,13 +1955,14 @@ static void bond_miimon_commit(struct bonding *bond) slave->link = BOND_LINK_UP; slave->last_link_up = jiffies; + primary = rtnl_dereference(bond->primary_slave); if (BOND_MODE(bond) == BOND_MODE_8023AD) { /* prevent it from being the active one */ bond_set_backup_slave(slave); } else if (BOND_MODE(bond) != BOND_MODE_ACTIVEBACKUP) { /* make it immediately active */ bond_set_active_slave(slave); - } else if (slave != bond->primary_slave) { + } else if (slave != primary) { /* prevent it from being the active one */ bond_set_backup_slave(slave); } @@ -2009,8 +1980,10 @@ static void bond_miimon_commit(struct bonding *bond) bond_alb_handle_link_change(bond, slave, BOND_LINK_UP); - if (!bond->curr_active_slave || - (slave == bond->primary_slave)) + if (BOND_MODE(bond) == BOND_MODE_XOR) + bond_update_slave_arr(bond, NULL); + + if (!bond->curr_active_slave || slave == primary) goto do_failover; continue; @@ -2037,6 +2010,9 @@ static void bond_miimon_commit(struct bonding *bond) bond_alb_handle_link_change(bond, slave, BOND_LINK_DOWN); + if (BOND_MODE(bond) == BOND_MODE_XOR) + bond_update_slave_arr(bond, NULL); + if (slave == rcu_access_pointer(bond->curr_active_slave)) goto do_failover; @@ -2051,19 +2027,15 @@ static void bond_miimon_commit(struct bonding *bond) } do_failover: - ASSERT_RTNL(); block_netpoll_tx(); - write_lock_bh(&bond->curr_slave_lock); bond_select_active_slave(bond); - write_unlock_bh(&bond->curr_slave_lock); unblock_netpoll_tx(); } bond_set_carrier(bond); } -/* - * bond_mii_monitor +/* bond_mii_monitor * * Really a wrapper that splits the mii monitor into two phases: an * inspection, then (if inspection indicates something needs to be done) @@ -2135,8 +2107,7 @@ static bool bond_has_this_ip(struct bonding *bond, __be32 ip) return ret; } -/* - * We go to the (large) trouble of VLAN tagging ARP frames because +/* We go to the (large) trouble of VLAN tagging ARP frames because * switches in VLAN mode (especially if ports are configured as * "native" to a VLAN) might not pass non-tagged frames. */ @@ -2363,8 +2334,7 @@ int bond_arp_rcv(const struct sk_buff *skb, struct bonding *bond, curr_active_slave = rcu_dereference(bond->curr_active_slave); - /* - * Backup slaves won't see the ARP reply, but do come through + /* Backup slaves won't see the ARP reply, but do come through * here for each ARP probe (so we swap the sip/tip to validate * the probe). In a "redundant switch, common router" type of * configuration, the ARP probe will (hopefully) travel from @@ -2404,8 +2374,7 @@ static bool bond_time_in_interval(struct bonding *bond, unsigned long last_act, last_act + mod * delta_in_ticks + delta_in_ticks/2); } -/* - * this function is called regularly to monitor each slave's link +/* This function is called regularly to monitor each slave's link * ensuring that traffic is being sent and received when arp monitoring * is used in load-balancing mode. if the adapter has been dormant, then an * arp is transmitted to generate traffic. see activebackup_arp_monitor for @@ -2500,16 +2469,11 @@ static void bond_loadbalance_arp_mon(struct work_struct *work) if (slave_state_changed) { bond_slave_state_change(bond); + if (BOND_MODE(bond) == BOND_MODE_XOR) + bond_update_slave_arr(bond, NULL); } else if (do_failover) { - /* the bond_select_active_slave must hold RTNL - * and curr_slave_lock for write. - */ block_netpoll_tx(); - write_lock_bh(&bond->curr_slave_lock); - bond_select_active_slave(bond); - - write_unlock_bh(&bond->curr_slave_lock); unblock_netpoll_tx(); } rtnl_unlock(); @@ -2521,13 +2485,12 @@ re_arm: msecs_to_jiffies(bond->params.arp_interval)); } -/* - * Called to inspect slaves for active-backup mode ARP monitor link state +/* Called to inspect slaves for active-backup mode ARP monitor link state * changes. Sets new_link in slaves to specify what action should take * place for the slave. Returns 0 if no changes are found, >0 if changes * to link states must be committed. * - * Called with rcu_read_lock hold. + * Called with rcu_read_lock held. */ static int bond_ab_arp_inspect(struct bonding *bond) { @@ -2548,16 +2511,14 @@ static int bond_ab_arp_inspect(struct bonding *bond) continue; } - /* - * Give slaves 2*delta after being enslaved or made + /* Give slaves 2*delta after being enslaved or made * active. This avoids bouncing, as the last receive * times need a full ARP monitor cycle to be updated. */ if (bond_time_in_interval(bond, slave->last_link_up, 2)) continue; - /* - * Backup slave is down if: + /* Backup slave is down if: * - No current_arp_slave AND * - more than 3*delta since last receive AND * - the bond has an IP address @@ -2576,8 +2537,7 @@ static int bond_ab_arp_inspect(struct bonding *bond) commit++; } - /* - * Active slave is down if: + /* Active slave is down if: * - more than 2*delta since transmitting OR * - (more than 2*delta since receive AND * the bond has an IP address) @@ -2594,8 +2554,7 @@ static int bond_ab_arp_inspect(struct bonding *bond) return commit; } -/* - * Called to commit link state changes noted by inspection step of +/* Called to commit link state changes noted by inspection step of * active-backup mode ARP monitor. * * Called with RTNL hold. @@ -2631,7 +2590,7 @@ static void bond_ab_arp_commit(struct bonding *bond) slave->dev->name); if (!rtnl_dereference(bond->curr_active_slave) || - (slave == bond->primary_slave)) + slave == rtnl_dereference(bond->primary_slave)) goto do_failover; } @@ -2663,21 +2622,17 @@ static void bond_ab_arp_commit(struct bonding *bond) } do_failover: - ASSERT_RTNL(); block_netpoll_tx(); - write_lock_bh(&bond->curr_slave_lock); bond_select_active_slave(bond); - write_unlock_bh(&bond->curr_slave_lock); unblock_netpoll_tx(); } bond_set_carrier(bond); } -/* - * Send ARP probes for active-backup mode ARP monitor. +/* Send ARP probes for active-backup mode ARP monitor. * - * Called with rcu_read_lock hold. + * Called with rcu_read_lock held. */ static bool bond_ab_arp_probe(struct bonding *bond) { @@ -2817,9 +2772,7 @@ re_arm: /*-------------------------- netdev event handling --------------------------*/ -/* - * Change device name - */ +/* Change device name */ static int bond_event_changename(struct bonding *bond) { bond_remove_proc_entry(bond); @@ -2858,7 +2811,7 @@ static int bond_master_netdev_event(unsigned long event, static int bond_slave_netdev_event(unsigned long event, struct net_device *slave_dev) { - struct slave *slave = bond_slave_get_rtnl(slave_dev); + struct slave *slave = bond_slave_get_rtnl(slave_dev), *primary; struct bonding *bond; struct net_device *bond_dev; u32 old_speed; @@ -2872,6 +2825,7 @@ static int bond_slave_netdev_event(unsigned long event, return NOTIFY_DONE; bond_dev = slave->bond->dev; bond = slave->bond; + primary = rtnl_dereference(bond->primary_slave); switch (event) { case NETDEV_UNREGISTER: @@ -2893,15 +2847,23 @@ static int bond_slave_netdev_event(unsigned long event, if (old_duplex != slave->duplex) bond_3ad_adapter_duplex_changed(slave); } + /* Refresh slave-array if applicable! + * If the setup does not use miimon or arpmon (mode-specific!), + * then these events will not cause the slave-array to be + * refreshed. This will cause xmit to use a slave that is not + * usable. Avoid such situation by refeshing the array at these + * events. If these (miimon/arpmon) parameters are configured + * then array gets refreshed twice and that should be fine! + */ + if (bond_mode_uses_xmit_hash(bond)) + bond_update_slave_arr(bond, NULL); break; case NETDEV_DOWN: - /* - * ... Or is it this? - */ + if (bond_mode_uses_xmit_hash(bond)) + bond_update_slave_arr(bond, NULL); break; case NETDEV_CHANGEMTU: - /* - * TODO: Should slaves be allowed to + /* TODO: Should slaves be allowed to * independently alter their MTU? For * an active-backup bond, slaves need * not be the same type of device, so @@ -2919,23 +2881,21 @@ static int bond_slave_netdev_event(unsigned long event, !bond->params.primary[0]) break; - if (slave == bond->primary_slave) { + if (slave == primary) { /* slave's name changed - he's no longer primary */ - bond->primary_slave = NULL; + RCU_INIT_POINTER(bond->primary_slave, NULL); } else if (!strcmp(slave_dev->name, bond->params.primary)) { /* we have a new primary slave */ - bond->primary_slave = slave; + rcu_assign_pointer(bond->primary_slave, slave); } else { /* we didn't change primary - exit */ break; } netdev_info(bond->dev, "Primary slave changed to %s, reselecting active slave\n", - bond->primary_slave ? slave_dev->name : "none"); + primary ? slave_dev->name : "none"); block_netpoll_tx(); - write_lock_bh(&bond->curr_slave_lock); bond_select_active_slave(bond); - write_unlock_bh(&bond->curr_slave_lock); unblock_netpoll_tx(); break; case NETDEV_FEAT_CHANGE: @@ -2952,8 +2912,7 @@ static int bond_slave_netdev_event(unsigned long event, return NOTIFY_DONE; } -/* - * bond_netdev_event: handle netdev notifier chain events. +/* bond_netdev_event: handle netdev notifier chain events. * * This function receives events for the netdev chain. The caller (an * ioctl handler calling blocking_notifier_call_chain) holds the necessary @@ -3081,6 +3040,7 @@ static void bond_work_init_all(struct bonding *bond) else INIT_DELAYED_WORK(&bond->arp_work, bond_loadbalance_arp_mon); INIT_DELAYED_WORK(&bond->ad_work, bond_3ad_state_machine_handler); + INIT_DELAYED_WORK(&bond->slave_arr_work, bond_slave_arr_handler); } static void bond_work_cancel_all(struct bonding *bond) @@ -3090,6 +3050,7 @@ static void bond_work_cancel_all(struct bonding *bond) cancel_delayed_work_sync(&bond->alb_work); cancel_delayed_work_sync(&bond->ad_work); cancel_delayed_work_sync(&bond->mcast_work); + cancel_delayed_work_sync(&bond->slave_arr_work); } static int bond_open(struct net_device *bond_dev) @@ -3099,9 +3060,7 @@ static int bond_open(struct net_device *bond_dev) struct slave *slave; /* reset slave->backup and slave->inactive */ - read_lock(&bond->lock); if (bond_has_slaves(bond)) { - read_lock(&bond->curr_slave_lock); bond_for_each_slave(bond, slave, iter) { if (bond_uses_primary(bond) && slave != rcu_access_pointer(bond->curr_active_slave)) { @@ -3112,9 +3071,7 @@ static int bond_open(struct net_device *bond_dev) BOND_SLAVE_NOTIFY_NOW); } } - read_unlock(&bond->curr_slave_lock); } - read_unlock(&bond->lock); bond_work_init_all(bond); @@ -3143,6 +3100,9 @@ static int bond_open(struct net_device *bond_dev) bond_3ad_initiate_agg_selection(bond, 1); } + if (bond_mode_uses_xmit_hash(bond)) + bond_update_slave_arr(bond, NULL); + return 0; } @@ -3167,40 +3127,43 @@ static struct rtnl_link_stats64 *bond_get_stats(struct net_device *bond_dev, struct list_head *iter; struct slave *slave; - memset(stats, 0, sizeof(*stats)); + memcpy(stats, &bond->bond_stats, sizeof(*stats)); - read_lock_bh(&bond->lock); bond_for_each_slave(bond, slave, iter) { const struct rtnl_link_stats64 *sstats = dev_get_stats(slave->dev, &temp); + struct rtnl_link_stats64 *pstats = &slave->slave_stats; - stats->rx_packets += sstats->rx_packets; - stats->rx_bytes += sstats->rx_bytes; - stats->rx_errors += sstats->rx_errors; - stats->rx_dropped += sstats->rx_dropped; + stats->rx_packets += sstats->rx_packets - pstats->rx_packets; + stats->rx_bytes += sstats->rx_bytes - pstats->rx_bytes; + stats->rx_errors += sstats->rx_errors - pstats->rx_errors; + stats->rx_dropped += sstats->rx_dropped - pstats->rx_dropped; - stats->tx_packets += sstats->tx_packets; - stats->tx_bytes += sstats->tx_bytes; - stats->tx_errors += sstats->tx_errors; - stats->tx_dropped += sstats->tx_dropped; + stats->tx_packets += sstats->tx_packets - pstats->tx_packets;; + stats->tx_bytes += sstats->tx_bytes - pstats->tx_bytes; + stats->tx_errors += sstats->tx_errors - pstats->tx_errors; + stats->tx_dropped += sstats->tx_dropped - pstats->tx_dropped; - stats->multicast += sstats->multicast; - stats->collisions += sstats->collisions; + stats->multicast += sstats->multicast - pstats->multicast; + stats->collisions += sstats->collisions - pstats->collisions; - stats->rx_length_errors += sstats->rx_length_errors; - stats->rx_over_errors += sstats->rx_over_errors; - stats->rx_crc_errors += sstats->rx_crc_errors; - stats->rx_frame_errors += sstats->rx_frame_errors; - stats->rx_fifo_errors += sstats->rx_fifo_errors; - stats->rx_missed_errors += sstats->rx_missed_errors; + stats->rx_length_errors += sstats->rx_length_errors - pstats->rx_length_errors; + stats->rx_over_errors += sstats->rx_over_errors - pstats->rx_over_errors; + stats->rx_crc_errors += sstats->rx_crc_errors - pstats->rx_crc_errors; + stats->rx_frame_errors += sstats->rx_frame_errors - pstats->rx_frame_errors; + stats->rx_fifo_errors += sstats->rx_fifo_errors - pstats->rx_fifo_errors; + stats->rx_missed_errors += sstats->rx_missed_errors - pstats->rx_missed_errors; - stats->tx_aborted_errors += sstats->tx_aborted_errors; - stats->tx_carrier_errors += sstats->tx_carrier_errors; - stats->tx_fifo_errors += sstats->tx_fifo_errors; - stats->tx_heartbeat_errors += sstats->tx_heartbeat_errors; - stats->tx_window_errors += sstats->tx_window_errors; + stats->tx_aborted_errors += sstats->tx_aborted_errors - pstats->tx_aborted_errors; + stats->tx_carrier_errors += sstats->tx_carrier_errors - pstats->tx_carrier_errors; + stats->tx_fifo_errors += sstats->tx_fifo_errors - pstats->tx_fifo_errors; + stats->tx_heartbeat_errors += sstats->tx_heartbeat_errors - pstats->tx_heartbeat_errors; + stats->tx_window_errors += sstats->tx_window_errors - pstats->tx_window_errors; + + /* save off the slave stats for the next run */ + memcpy(pstats, sstats, sizeof(*sstats)); } - read_unlock_bh(&bond->lock); + memcpy(&bond->bond_stats, stats, sizeof(*stats)); return stats; } @@ -3229,24 +3192,17 @@ static int bond_do_ioctl(struct net_device *bond_dev, struct ifreq *ifr, int cmd mii->phy_id = 0; /* Fall Through */ case SIOCGMIIREG: - /* - * We do this again just in case we were called by SIOCGMIIREG + /* We do this again just in case we were called by SIOCGMIIREG * instead of SIOCGMIIPHY. */ mii = if_mii(ifr); if (!mii) return -EINVAL; - if (mii->reg_num == 1) { mii->val_out = 0; - read_lock(&bond->lock); - read_lock(&bond->curr_slave_lock); if (netif_carrier_ok(bond->dev)) mii->val_out = BMSR_LSTATUS; - - read_unlock(&bond->curr_slave_lock); - read_unlock(&bond->lock); } return 0; @@ -3277,7 +3233,6 @@ static int bond_do_ioctl(struct net_device *bond_dev, struct ifreq *ifr, int cmd return res; default: - /* Go on */ break; } @@ -3339,7 +3294,6 @@ static void bond_set_rx_mode(struct net_device *bond_dev) struct list_head *iter; struct slave *slave; - rcu_read_lock(); if (bond_uses_primary(bond)) { slave = rcu_dereference(bond->curr_active_slave); @@ -3377,8 +3331,7 @@ static int bond_neigh_init(struct neighbour *n) if (ret) return ret; - /* - * Assign slave's neigh_cleanup to neighbour in case cleanup is called + /* Assign slave's neigh_cleanup to neighbour in case cleanup is called * after the last slave has been detached. Assumes that all slaves * utilize the same neigh_cleanup (true at this writing as only user * is ipoib). @@ -3391,8 +3344,7 @@ static int bond_neigh_init(struct neighbour *n) return parms.neigh_setup(n); } -/* - * The bonding ndo_neigh_setup is called at init time beofre any +/* The bonding ndo_neigh_setup is called at init time beofre any * slave exists. So we must declare proxy setup function which will * be used at run time to resolve the actual slave neigh param setup. * @@ -3410,9 +3362,7 @@ static int bond_neigh_setup(struct net_device *dev, return 0; } -/* - * Change the MTU of all of a master's slaves to match the master - */ +/* Change the MTU of all of a master's slaves to match the master */ static int bond_change_mtu(struct net_device *bond_dev, int new_mtu) { struct bonding *bond = netdev_priv(bond_dev); @@ -3422,21 +3372,6 @@ static int bond_change_mtu(struct net_device *bond_dev, int new_mtu) netdev_dbg(bond_dev, "bond=%p, new_mtu=%d\n", bond, new_mtu); - /* Can't hold bond->lock with bh disabled here since - * some base drivers panic. On the other hand we can't - * hold bond->lock without bh disabled because we'll - * deadlock. The only solution is to rely on the fact - * that we're under rtnl_lock here, and the slaves - * list won't change. This doesn't solve the problem - * of setting the slave's MTU while it is - * transmitting, but the assumption is that the base - * driver can handle that. - * - * TODO: figure out a way to safely iterate the slaves - * list, but without holding a lock around the actual - * call to the base driver. - */ - bond_for_each_slave(bond, slave, iter) { netdev_dbg(bond_dev, "s %p c_m %p\n", slave, slave->dev->netdev_ops->ndo_change_mtu); @@ -3480,8 +3415,7 @@ unwind: return res; } -/* - * Change HW address +/* Change HW address * * Note that many devices must be down to change the HW address, and * downing the master releases all slaves. We can make bonds full of @@ -3511,21 +3445,6 @@ static int bond_set_mac_address(struct net_device *bond_dev, void *addr) if (!is_valid_ether_addr(sa->sa_data)) return -EADDRNOTAVAIL; - /* Can't hold bond->lock with bh disabled here since - * some base drivers panic. On the other hand we can't - * hold bond->lock without bh disabled because we'll - * deadlock. The only solution is to rely on the fact - * that we're under rtnl_lock here, and the slaves - * list won't change. This doesn't solve the problem - * of setting the slave's hw address while it is - * transmitting, but the assumption is that the base - * driver can handle that. - * - * TODO: figure out a way to safely iterate the slaves - * list, but without holding a lock around the actual - * call to the base driver. - */ - bond_for_each_slave(bond, slave, iter) { netdev_dbg(bond_dev, "slave %p %s\n", slave, slave->dev->name); res = dev_set_mac_address(slave->dev, addr); @@ -3654,7 +3573,7 @@ static int bond_xmit_roundrobin(struct sk_buff *skb, struct net_device *bond_dev */ if (iph->protocol == IPPROTO_IGMP && skb->protocol == htons(ETH_P_IP)) { slave = rcu_dereference(bond->curr_active_slave); - if (slave && bond_slave_can_tx(slave)) + if (slave) bond_dev_queue_xmit(bond, skb, slave->dev); else bond_xmit_slave_id(bond, skb, 0); @@ -3672,8 +3591,7 @@ static int bond_xmit_roundrobin(struct sk_buff *skb, struct net_device *bond_dev return NETDEV_TX_OK; } -/* - * in active-backup mode, we know that bond->curr_active_slave is always valid if +/* In active-backup mode, we know that bond->curr_active_slave is always valid if * the bond has a usable interface. */ static int bond_xmit_activebackup(struct sk_buff *skb, struct net_device *bond_dev) @@ -3690,20 +3608,148 @@ static int bond_xmit_activebackup(struct sk_buff *skb, struct net_device *bond_d return NETDEV_TX_OK; } -/* In bond_xmit_xor() , we determine the output device by using a pre- - * determined xmit_hash_policy(), If the selected device is not enabled, - * find the next active slave. +/* Use this to update slave_array when (a) it's not appropriate to update + * slave_array right away (note that update_slave_array() may sleep) + * and / or (b) RTNL is not held. */ -static int bond_xmit_xor(struct sk_buff *skb, struct net_device *bond_dev) +void bond_slave_arr_work_rearm(struct bonding *bond, unsigned long delay) { - struct bonding *bond = netdev_priv(bond_dev); - int slave_cnt = ACCESS_ONCE(bond->slave_cnt); + queue_delayed_work(bond->wq, &bond->slave_arr_work, delay); +} - if (likely(slave_cnt)) - bond_xmit_slave_id(bond, skb, - bond_xmit_hash(bond, skb) % slave_cnt); - else +/* Slave array work handler. Holds only RTNL */ +static void bond_slave_arr_handler(struct work_struct *work) +{ + struct bonding *bond = container_of(work, struct bonding, + slave_arr_work.work); + int ret; + + if (!rtnl_trylock()) + goto err; + + ret = bond_update_slave_arr(bond, NULL); + rtnl_unlock(); + if (ret) { + pr_warn_ratelimited("Failed to update slave array from WT\n"); + goto err; + } + return; + +err: + bond_slave_arr_work_rearm(bond, 1); +} + +/* Build the usable slaves array in control path for modes that use xmit-hash + * to determine the slave interface - + * (a) BOND_MODE_8023AD + * (b) BOND_MODE_XOR + * (c) BOND_MODE_TLB && tlb_dynamic_lb == 0 + * + * The caller is expected to hold RTNL only and NO other lock! + */ +int bond_update_slave_arr(struct bonding *bond, struct slave *skipslave) +{ + struct slave *slave; + struct list_head *iter; + struct bond_up_slave *new_arr, *old_arr; + int slaves_in_agg; + int agg_id = 0; + int ret = 0; + +#ifdef CONFIG_LOCKDEP + WARN_ON(lockdep_is_held(&bond->mode_lock)); +#endif + + new_arr = kzalloc(offsetof(struct bond_up_slave, arr[bond->slave_cnt]), + GFP_KERNEL); + if (!new_arr) { + ret = -ENOMEM; + pr_err("Failed to build slave-array.\n"); + goto out; + } + if (BOND_MODE(bond) == BOND_MODE_8023AD) { + struct ad_info ad_info; + + if (bond_3ad_get_active_agg_info(bond, &ad_info)) { + pr_debug("bond_3ad_get_active_agg_info failed\n"); + kfree_rcu(new_arr, rcu); + /* No active aggragator means it's not safe to use + * the previous array. + */ + old_arr = rtnl_dereference(bond->slave_arr); + if (old_arr) { + RCU_INIT_POINTER(bond->slave_arr, NULL); + kfree_rcu(old_arr, rcu); + } + goto out; + } + slaves_in_agg = ad_info.ports; + agg_id = ad_info.aggregator_id; + } + bond_for_each_slave(bond, slave, iter) { + if (BOND_MODE(bond) == BOND_MODE_8023AD) { + struct aggregator *agg; + + agg = SLAVE_AD_INFO(slave)->port.aggregator; + if (!agg || agg->aggregator_identifier != agg_id) + continue; + } + if (!bond_slave_can_tx(slave)) + continue; + if (skipslave == slave) + continue; + new_arr->arr[new_arr->count++] = slave; + } + + old_arr = rtnl_dereference(bond->slave_arr); + rcu_assign_pointer(bond->slave_arr, new_arr); + if (old_arr) + kfree_rcu(old_arr, rcu); +out: + if (ret != 0 && skipslave) { + int idx; + + /* Rare situation where caller has asked to skip a specific + * slave but allocation failed (most likely!). BTW this is + * only possible when the call is initiated from + * __bond_release_one(). In this situation; overwrite the + * skipslave entry in the array with the last entry from the + * array to avoid a situation where the xmit path may choose + * this to-be-skipped slave to send a packet out. + */ + old_arr = rtnl_dereference(bond->slave_arr); + for (idx = 0; idx < old_arr->count; idx++) { + if (skipslave == old_arr->arr[idx]) { + old_arr->arr[idx] = + old_arr->arr[old_arr->count-1]; + old_arr->count--; + break; + } + } + } + return ret; +} + +/* Use this Xmit function for 3AD as well as XOR modes. The current + * usable slave array is formed in the control path. The xmit function + * just calculates hash and sends the packet out. + */ +int bond_3ad_xor_xmit(struct sk_buff *skb, struct net_device *dev) +{ + struct bonding *bond = netdev_priv(dev); + struct slave *slave; + struct bond_up_slave *slaves; + unsigned int count; + + slaves = rcu_dereference(bond->slave_arr); + count = slaves ? ACCESS_ONCE(slaves->count) : 0; + if (likely(count)) { + slave = slaves->arr[bond_xmit_hash(bond, skb) % count]; + bond_dev_queue_xmit(bond, skb, slave->dev); + } else { dev_kfree_skb_any(skb); + atomic_long_inc(&dev->tx_dropped); + } return NETDEV_TX_OK; } @@ -3726,7 +3772,6 @@ static int bond_xmit_broadcast(struct sk_buff *skb, struct net_device *bond_dev) bond_dev->name, __func__); continue; } - /* bond_dev_queue_xmit always returns 0 */ bond_dev_queue_xmit(bond, skb2, slave->dev); } } @@ -3740,9 +3785,7 @@ static int bond_xmit_broadcast(struct sk_buff *skb, struct net_device *bond_dev) /*------------------------- Device initialization ---------------------------*/ -/* - * Lookup the slave that corresponds to a qid - */ +/* Lookup the slave that corresponds to a qid */ static inline int bond_slave_override(struct bonding *bond, struct sk_buff *skb) { @@ -3771,17 +3814,14 @@ static inline int bond_slave_override(struct bonding *bond, static u16 bond_select_queue(struct net_device *dev, struct sk_buff *skb, void *accel_priv, select_queue_fallback_t fallback) { - /* - * This helper function exists to help dev_pick_tx get the correct + /* This helper function exists to help dev_pick_tx get the correct * destination queue. Using a helper function skips a call to * skb_tx_hash and will put the skbs in the queue we expect on their * way down to the bonding driver. */ u16 txq = skb_rx_queue_recorded(skb) ? skb_get_rx_queue(skb) : 0; - /* - * Save the original txq to restore before passing to the driver - */ + /* Save the original txq to restore before passing to the driver */ qdisc_skb_cb(skb)->slave_dev_queue_mapping = skb->queue_mapping; if (unlikely(txq >= dev->real_num_tx_queues)) { @@ -3805,12 +3845,11 @@ static netdev_tx_t __bond_start_xmit(struct sk_buff *skb, struct net_device *dev return bond_xmit_roundrobin(skb, dev); case BOND_MODE_ACTIVEBACKUP: return bond_xmit_activebackup(skb, dev); + case BOND_MODE_8023AD: case BOND_MODE_XOR: - return bond_xmit_xor(skb, dev); + return bond_3ad_xor_xmit(skb, dev); case BOND_MODE_BROADCAST: return bond_xmit_broadcast(skb, dev); - case BOND_MODE_8023AD: - return bond_3ad_xmit_xor(skb, dev); case BOND_MODE_ALB: return bond_alb_xmit(skb, dev); case BOND_MODE_TLB: @@ -3829,8 +3868,7 @@ static netdev_tx_t bond_start_xmit(struct sk_buff *skb, struct net_device *dev) struct bonding *bond = netdev_priv(dev); netdev_tx_t ret = NETDEV_TX_OK; - /* - * If we risk deadlock from transmitting this in the + /* If we risk deadlock from transmitting this in the * netpoll path, tell netpoll to queue the frame for later tx */ if (unlikely(is_netpoll_tx_blocked(dev))) @@ -3862,7 +3900,6 @@ static int bond_ethtool_get_settings(struct net_device *bond_dev, * the true receive or transmit bandwidth (not all modes are symmetric) * this is an accurate maximum. */ - read_lock(&bond->lock); bond_for_each_slave(bond, slave, iter) { if (bond_slave_can_tx(slave)) { if (slave->speed != SPEED_UNKNOWN) @@ -3873,7 +3910,6 @@ static int bond_ethtool_get_settings(struct net_device *bond_dev, } } ethtool_cmd_speed_set(ecmd, speed ? : SPEED_UNKNOWN); - read_unlock(&bond->lock); return 0; } @@ -3935,9 +3971,7 @@ void bond_setup(struct net_device *bond_dev) { struct bonding *bond = netdev_priv(bond_dev); - /* initialize rwlocks */ - rwlock_init(&bond->lock); - rwlock_init(&bond->curr_slave_lock); + spin_lock_init(&bond->mode_lock); bond->params = bonding_defaults; /* Initialize pointers */ @@ -3958,8 +3992,7 @@ void bond_setup(struct net_device *bond_dev) bond_dev->priv_flags |= IFF_BONDING | IFF_UNICAST_FLT; bond_dev->priv_flags &= ~(IFF_XMIT_DST_RELEASE | IFF_TX_SKB_SHARING); - /* don't acquire bond device's netif_tx_lock when - * transmitting */ + /* don't acquire bond device's netif_tx_lock when transmitting */ bond_dev->features |= NETIF_F_LLTX; /* By default, we declare the bond to be fully @@ -3982,15 +4015,15 @@ void bond_setup(struct net_device *bond_dev) bond_dev->features |= bond_dev->hw_features; } -/* -* Destroy a bonding device. -* Must be under rtnl_lock when this function is called. -*/ +/* Destroy a bonding device. + * Must be under rtnl_lock when this function is called. + */ static void bond_uninit(struct net_device *bond_dev) { struct bonding *bond = netdev_priv(bond_dev); struct list_head *iter; struct slave *slave; + struct bond_up_slave *arr; bond_netpoll_cleanup(bond_dev); @@ -3999,6 +4032,12 @@ static void bond_uninit(struct net_device *bond_dev) __bond_release_one(bond_dev, slave->dev, true); netdev_info(bond_dev, "Released all slaves\n"); + arr = rtnl_dereference(bond->slave_arr); + if (arr) { + RCU_INIT_POINTER(bond->slave_arr, NULL); + kfree_rcu(arr, rcu); + } + list_del(&bond->bond_list); bond_debug_unregister(bond); @@ -4013,9 +4052,7 @@ static int bond_check_params(struct bond_params *params) const struct bond_opt_value *valptr; int arp_all_targets_value; - /* - * Convert string parameters. - */ + /* Convert string parameters. */ if (mode) { bond_opt_initstr(&newval, mode); valptr = bond_opt_parse(bond_opt_get(BOND_OPT_MODE), &newval); @@ -4192,9 +4229,9 @@ static int bond_check_params(struct bond_params *params) for (arp_ip_count = 0, i = 0; (arp_ip_count < BOND_MAX_ARP_TARGETS) && arp_ip_target[i]; i++) { - /* not complete check, but should be good enough to - catch mistakes */ __be32 ip; + + /* not a complete check, but good enough to catch mistakes */ if (!in4_pton(arp_ip_target[i], -1, (u8 *)&ip, -1, NULL) || !bond_is_ip_target_ok(ip)) { pr_warn("Warning: bad arp_ip_target module parameter (%s), ARP monitoring will not be performed\n", @@ -4377,26 +4414,14 @@ static void bond_set_lockdep_class(struct net_device *dev) dev->qdisc_tx_busylock = &bonding_tx_busylock_key; } -/* - * Called from registration process - */ +/* Called from registration process */ static int bond_init(struct net_device *bond_dev) { struct bonding *bond = netdev_priv(bond_dev); struct bond_net *bn = net_generic(dev_net(bond_dev), bond_net_id); - struct alb_bond_info *bond_info = &(BOND_ALB_INFO(bond)); netdev_dbg(bond_dev, "Begin bond_init\n"); - /* - * Initialize locks that may be required during - * en/deslave operations. All of the bond_open work - * (of which this is part) should really be moved to - * a phase prior to dev_open - */ - spin_lock_init(&(bond_info->tx_hashtbl_lock)); - spin_lock_init(&(bond_info->rx_hashtbl_lock)); - bond->wq = create_singlethread_workqueue(bond_dev->name); if (!bond->wq) return -ENOMEM; @@ -4543,9 +4568,7 @@ static void __exit bonding_exit(void) unregister_pernet_subsys(&bond_net_ops); #ifdef CONFIG_NET_POLL_CONTROLLER - /* - * Make sure we don't have an imbalance on our netpoll blocking - */ + /* Make sure we don't have an imbalance on our netpoll blocking */ WARN_ON(atomic_read(&netpoll_block_tx)); #endif } |
