forked from Minki/linux
bonding: change test for presence of VLANs
After commit ad1afb0039
("vlan_dev: VLAN 0 should be treated as "no vlan tag" (802.1p packet)")
it is now regular practice for a VLAN "add vid" for VLAN 0 to
arrive prior to any VLAN registration or creation of a vlan_group.
This patch updates the bonding code that tests for the presence
of VLANs configured above bonding. The new logic tests for bond->vlgrp
to determine if a registration has occured, instead of testing that
bonding's internal vlan_list is empty.
The old code would panic when vlan_list was not empty, but
vlgrp was still NULL (because only an "add vid" for VLAN 0 had occured).
Bonding still adds VLAN 0 to its internal list so that 802.1p
frames are handled correctly on transmit when non-VLAN accelerated
slaves are members of the bond. The test against bond->vlan_list
remains in bond_dev_queue_xmit for this reason.
Modification to the bond->vlgrp now occurs under lock (in
addition to RTNL), because not all inspections of it occur under RTNL.
Additionally, because 8021q will never issue a "kill vid" for
VLAN 0, there is now logic in bond_uninit to release any remaining
entries from vlan_list.
Signed-off-by: Jay Vosburgh <fubar@us.ibm.com>
Cc: Pedro Garcia <pedro.netdev@dondevamos.com>
Cc: Patrick McHardy <kaber@trash.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
parent
4bee1f9ac0
commit
f35188faa0
@ -682,7 +682,7 @@ static struct slave *rlb_choose_channel(struct sk_buff *skb, struct bonding *bon
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client_info->ntt = 0;
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client_info->ntt = 0;
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}
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}
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if (!list_empty(&bond->vlan_list)) {
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if (bond->vlgrp) {
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if (!vlan_get_tag(skb, &client_info->vlan_id))
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if (!vlan_get_tag(skb, &client_info->vlan_id))
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client_info->tag = 1;
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client_info->tag = 1;
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}
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}
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@ -904,7 +904,7 @@ static void alb_send_learning_packets(struct slave *slave, u8 mac_addr[])
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skb->priority = TC_PRIO_CONTROL;
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skb->priority = TC_PRIO_CONTROL;
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skb->dev = slave->dev;
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skb->dev = slave->dev;
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if (!list_empty(&bond->vlan_list)) {
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if (bond->vlgrp) {
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struct vlan_entry *vlan;
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struct vlan_entry *vlan;
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vlan = bond_next_vlan(bond,
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vlan = bond_next_vlan(bond,
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@ -424,6 +424,7 @@ int bond_dev_queue_xmit(struct bonding *bond, struct sk_buff *skb,
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{
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{
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unsigned short uninitialized_var(vlan_id);
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unsigned short uninitialized_var(vlan_id);
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/* Test vlan_list not vlgrp to catch and handle 802.1p tags */
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if (!list_empty(&bond->vlan_list) &&
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if (!list_empty(&bond->vlan_list) &&
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!(slave_dev->features & NETIF_F_HW_VLAN_TX) &&
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!(slave_dev->features & NETIF_F_HW_VLAN_TX) &&
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vlan_get_tag(skb, &vlan_id) == 0) {
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vlan_get_tag(skb, &vlan_id) == 0) {
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@ -487,7 +488,9 @@ static void bond_vlan_rx_register(struct net_device *bond_dev,
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struct slave *slave;
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struct slave *slave;
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int i;
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int i;
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write_lock(&bond->lock);
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bond->vlgrp = grp;
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bond->vlgrp = grp;
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write_unlock(&bond->lock);
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bond_for_each_slave(bond, slave, i) {
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bond_for_each_slave(bond, slave, i) {
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struct net_device *slave_dev = slave->dev;
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struct net_device *slave_dev = slave->dev;
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@ -569,7 +572,7 @@ static void bond_add_vlans_on_slave(struct bonding *bond, struct net_device *sla
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write_lock_bh(&bond->lock);
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write_lock_bh(&bond->lock);
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if (list_empty(&bond->vlan_list))
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if (!bond->vlgrp)
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goto out;
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goto out;
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if ((slave_dev->features & NETIF_F_HW_VLAN_RX) &&
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if ((slave_dev->features & NETIF_F_HW_VLAN_RX) &&
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@ -596,7 +599,7 @@ static void bond_del_vlans_from_slave(struct bonding *bond,
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write_lock_bh(&bond->lock);
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write_lock_bh(&bond->lock);
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if (list_empty(&bond->vlan_list))
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if (!bond->vlgrp)
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goto out;
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goto out;
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if (!(slave_dev->features & NETIF_F_HW_VLAN_FILTER) ||
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if (!(slave_dev->features & NETIF_F_HW_VLAN_FILTER) ||
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@ -604,6 +607,8 @@ static void bond_del_vlans_from_slave(struct bonding *bond,
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goto unreg;
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goto unreg;
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list_for_each_entry(vlan, &bond->vlan_list, vlan_list) {
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list_for_each_entry(vlan, &bond->vlan_list, vlan_list) {
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if (!vlan->vlan_id)
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continue;
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/* Save and then restore vlan_dev in the grp array,
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/* Save and then restore vlan_dev in the grp array,
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* since the slave's driver might clear it.
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* since the slave's driver might clear it.
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*/
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*/
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@ -1443,7 +1448,7 @@ int bond_enslave(struct net_device *bond_dev, struct net_device *slave_dev)
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/* no need to lock since we're protected by rtnl_lock */
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/* no need to lock since we're protected by rtnl_lock */
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if (slave_dev->features & NETIF_F_VLAN_CHALLENGED) {
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if (slave_dev->features & NETIF_F_VLAN_CHALLENGED) {
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pr_debug("%s: NETIF_F_VLAN_CHALLENGED\n", slave_dev->name);
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pr_debug("%s: NETIF_F_VLAN_CHALLENGED\n", slave_dev->name);
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if (!list_empty(&bond->vlan_list)) {
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if (bond->vlgrp) {
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pr_err("%s: Error: cannot enslave VLAN challenged slave %s on VLAN enabled bond %s\n",
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pr_err("%s: Error: cannot enslave VLAN challenged slave %s on VLAN enabled bond %s\n",
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bond_dev->name, slave_dev->name, bond_dev->name);
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bond_dev->name, slave_dev->name, bond_dev->name);
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return -EPERM;
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return -EPERM;
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@ -1942,7 +1947,7 @@ int bond_release(struct net_device *bond_dev, struct net_device *slave_dev)
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*/
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*/
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memset(bond_dev->dev_addr, 0, bond_dev->addr_len);
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memset(bond_dev->dev_addr, 0, bond_dev->addr_len);
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if (list_empty(&bond->vlan_list)) {
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if (!bond->vlgrp) {
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bond_dev->features |= NETIF_F_VLAN_CHALLENGED;
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bond_dev->features |= NETIF_F_VLAN_CHALLENGED;
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} else {
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} else {
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pr_warning("%s: Warning: clearing HW address of %s while it still has VLANs.\n",
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pr_warning("%s: Warning: clearing HW address of %s while it still has VLANs.\n",
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@ -2134,9 +2139,9 @@ static int bond_release_all(struct net_device *bond_dev)
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*/
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*/
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memset(bond_dev->dev_addr, 0, bond_dev->addr_len);
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memset(bond_dev->dev_addr, 0, bond_dev->addr_len);
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if (list_empty(&bond->vlan_list))
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if (!bond->vlgrp) {
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bond_dev->features |= NETIF_F_VLAN_CHALLENGED;
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bond_dev->features |= NETIF_F_VLAN_CHALLENGED;
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else {
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} else {
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pr_warning("%s: Warning: clearing HW address of %s while it still has VLANs.\n",
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pr_warning("%s: Warning: clearing HW address of %s while it still has VLANs.\n",
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bond_dev->name, bond_dev->name);
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bond_dev->name, bond_dev->name);
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pr_warning("%s: When re-adding slaves, make sure the bond's HW address matches its VLANs'.\n",
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pr_warning("%s: When re-adding slaves, make sure the bond's HW address matches its VLANs'.\n",
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@ -2569,7 +2574,7 @@ static void bond_arp_send_all(struct bonding *bond, struct slave *slave)
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if (!targets[i])
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if (!targets[i])
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break;
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break;
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pr_debug("basa: target %x\n", targets[i]);
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pr_debug("basa: target %x\n", targets[i]);
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if (list_empty(&bond->vlan_list)) {
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if (!bond->vlgrp) {
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pr_debug("basa: empty vlan: arp_send\n");
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pr_debug("basa: empty vlan: arp_send\n");
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bond_arp_send(slave->dev, ARPOP_REQUEST, targets[i],
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bond_arp_send(slave->dev, ARPOP_REQUEST, targets[i],
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bond->master_ip, 0);
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bond->master_ip, 0);
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@ -2658,6 +2663,9 @@ static void bond_send_gratuitous_arp(struct bonding *bond)
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bond->master_ip, 0);
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bond->master_ip, 0);
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}
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}
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if (!bond->vlgrp)
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return;
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list_for_each_entry(vlan, &bond->vlan_list, vlan_list) {
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list_for_each_entry(vlan, &bond->vlan_list, vlan_list) {
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vlan_dev = vlan_group_get_device(bond->vlgrp, vlan->vlan_id);
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vlan_dev = vlan_group_get_device(bond->vlgrp, vlan->vlan_id);
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if (vlan->vlan_ip) {
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if (vlan->vlan_ip) {
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@ -3590,6 +3598,8 @@ static int bond_inetaddr_event(struct notifier_block *this, unsigned long event,
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}
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}
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list_for_each_entry(vlan, &bond->vlan_list, vlan_list) {
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list_for_each_entry(vlan, &bond->vlan_list, vlan_list) {
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if (!bond->vlgrp)
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continue;
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vlan_dev = vlan_group_get_device(bond->vlgrp, vlan->vlan_id);
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vlan_dev = vlan_group_get_device(bond->vlgrp, vlan->vlan_id);
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if (vlan_dev == event_dev) {
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if (vlan_dev == event_dev) {
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switch (event) {
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switch (event) {
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@ -4686,6 +4696,7 @@ static void bond_work_cancel_all(struct bonding *bond)
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static void bond_uninit(struct net_device *bond_dev)
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static void bond_uninit(struct net_device *bond_dev)
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{
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{
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struct bonding *bond = netdev_priv(bond_dev);
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struct bonding *bond = netdev_priv(bond_dev);
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struct vlan_entry *vlan, *tmp;
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bond_netpoll_cleanup(bond_dev);
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bond_netpoll_cleanup(bond_dev);
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@ -4699,6 +4710,11 @@ static void bond_uninit(struct net_device *bond_dev)
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bond_remove_proc_entry(bond);
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bond_remove_proc_entry(bond);
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__hw_addr_flush(&bond->mc_list);
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__hw_addr_flush(&bond->mc_list);
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list_for_each_entry_safe(vlan, tmp, &bond->vlan_list, vlan_list) {
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list_del(&vlan->vlan_list);
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kfree(vlan);
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}
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}
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}
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/*------------------------- Module initialization ---------------------------*/
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/*------------------------- Module initialization ---------------------------*/
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