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bond: Add support for multiple network namespaces
Signed-off-by: Eric W. Biederman <ebiederm@aristanetworks.com> Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Eric W. Biederman
David S. Miller
parent
88ead97710
commit
ec87fd3b4e
@ -2445,9 +2445,6 @@ int bond_3ad_lacpdu_recv(struct sk_buff *skb, struct net_device *dev, struct pac
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struct slave *slave = NULL;
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int ret = NET_RX_DROP;
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if (dev_net(dev) != &init_net)
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goto out;
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if (!(dev->flags & IFF_MASTER))
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goto out;
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@ -355,9 +355,6 @@ static int rlb_arp_recv(struct sk_buff *skb, struct net_device *bond_dev, struct
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struct arp_pkt *arp = (struct arp_pkt *)skb->data;
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int res = NET_RX_DROP;
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if (dev_net(bond_dev) != &init_net)
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goto out;
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while (bond_dev->priv_flags & IFF_802_1Q_VLAN)
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bond_dev = vlan_dev_real_dev(bond_dev);
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@ -25,6 +25,7 @@
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#include <net/ipv6.h>
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#include <net/ndisc.h>
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#include <net/addrconf.h>
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#include <net/netns/generic.h>
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#include "bonding.h"
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/*
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@ -152,11 +153,9 @@ static int bond_inet6addr_event(struct notifier_block *this,
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struct net_device *vlan_dev, *event_dev = ifa->idev->dev;
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struct bonding *bond;
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struct vlan_entry *vlan;
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struct bond_net *bn = net_generic(dev_net(event_dev), bond_net_id);
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if (dev_net(event_dev) != &init_net)
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return NOTIFY_DONE;
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list_for_each_entry(bond, &bond_dev_list, bond_list) {
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list_for_each_entry(bond, &bn->dev_list, bond_list) {
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if (bond->dev == event_dev) {
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switch (event) {
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case NETDEV_UP:
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@ -75,6 +75,7 @@
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#include <linux/jiffies.h>
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#include <net/route.h>
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#include <net/net_namespace.h>
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#include <net/netns/generic.h>
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#include "bonding.h"
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#include "bond_3ad.h"
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#include "bond_alb.h"
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@ -157,11 +158,7 @@ MODULE_PARM_DESC(fail_over_mac, "For active-backup, do not set all slaves to the
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static const char * const version =
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DRV_DESCRIPTION ": v" DRV_VERSION " (" DRV_RELDATE ")\n";
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LIST_HEAD(bond_dev_list);
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#ifdef CONFIG_PROC_FS
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static struct proc_dir_entry *bond_proc_dir;
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#endif
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int bond_net_id;
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static __be32 arp_target[BOND_MAX_ARP_TARGETS];
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static int arp_ip_count;
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@ -2586,7 +2583,7 @@ static void bond_arp_send_all(struct bonding *bond, struct slave *slave)
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fl.fl4_dst = targets[i];
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fl.fl4_tos = RTO_ONLINK;
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rv = ip_route_output_key(&init_net, &rt, &fl);
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rv = ip_route_output_key(dev_net(bond->dev), &rt, &fl);
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if (rv) {
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if (net_ratelimit()) {
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pr_warning(DRV_NAME
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@ -2694,9 +2691,6 @@ static int bond_arp_rcv(struct sk_buff *skb, struct net_device *dev, struct pack
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unsigned char *arp_ptr;
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__be32 sip, tip;
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if (dev_net(dev) != &init_net)
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goto out;
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if (!(dev->priv_flags & IFF_BONDING) || !(dev->flags & IFF_MASTER))
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goto out;
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@ -3359,10 +3353,11 @@ static const struct file_operations bond_info_fops = {
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static void bond_create_proc_entry(struct bonding *bond)
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{
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struct net_device *bond_dev = bond->dev;
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struct bond_net *bn = net_generic(dev_net(bond_dev), bond_net_id);
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if (bond_proc_dir) {
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if (bn->proc_dir) {
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bond->proc_entry = proc_create_data(bond_dev->name,
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S_IRUGO, bond_proc_dir,
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S_IRUGO, bn->proc_dir,
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&bond_info_fops, bond);
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if (bond->proc_entry == NULL)
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pr_warning(DRV_NAME
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@ -3375,8 +3370,11 @@ static void bond_create_proc_entry(struct bonding *bond)
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static void bond_remove_proc_entry(struct bonding *bond)
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{
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if (bond_proc_dir && bond->proc_entry) {
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remove_proc_entry(bond->proc_file_name, bond_proc_dir);
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struct net_device *bond_dev = bond->dev;
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struct bond_net *bn = net_generic(dev_net(bond_dev), bond_net_id);
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if (bn->proc_dir && bond->proc_entry) {
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remove_proc_entry(bond->proc_file_name, bn->proc_dir);
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memset(bond->proc_file_name, 0, IFNAMSIZ);
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bond->proc_entry = NULL;
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}
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@ -3385,11 +3383,11 @@ static void bond_remove_proc_entry(struct bonding *bond)
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/* Create the bonding directory under /proc/net, if doesn't exist yet.
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* Caller must hold rtnl_lock.
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*/
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static void bond_create_proc_dir(void)
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static void bond_create_proc_dir(struct bond_net *bn)
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{
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if (!bond_proc_dir) {
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bond_proc_dir = proc_mkdir(DRV_NAME, init_net.proc_net);
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if (!bond_proc_dir)
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if (!bn->proc_dir) {
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bn->proc_dir = proc_mkdir(DRV_NAME, bn->net->proc_net);
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if (!bn->proc_dir)
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pr_warning(DRV_NAME
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": Warning: cannot create /proc/net/%s\n",
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DRV_NAME);
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@ -3399,11 +3397,11 @@ static void bond_create_proc_dir(void)
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/* Destroy the bonding directory under /proc/net, if empty.
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* Caller must hold rtnl_lock.
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*/
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static void bond_destroy_proc_dir(void)
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static void bond_destroy_proc_dir(struct bond_net *bn)
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{
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if (bond_proc_dir) {
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remove_proc_entry(DRV_NAME, init_net.proc_net);
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bond_proc_dir = NULL;
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if (bn->proc_dir) {
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remove_proc_entry(DRV_NAME, bn->net->proc_net);
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bn->proc_dir = NULL;
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}
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}
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@ -3417,11 +3415,11 @@ static void bond_remove_proc_entry(struct bonding *bond)
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{
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}
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static void bond_create_proc_dir(void)
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static void bond_create_proc_dir(struct bond_net *bn)
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{
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}
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static void bond_destroy_proc_dir(void)
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static void bond_destroy_proc_dir(struct bond_net *bn)
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{
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}
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@ -3540,9 +3538,6 @@ static int bond_netdev_event(struct notifier_block *this,
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{
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struct net_device *event_dev = (struct net_device *)ptr;
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if (dev_net(event_dev) != &init_net)
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return NOTIFY_DONE;
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pr_debug("event_dev: %s, event: %lx\n",
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(event_dev ? event_dev->name : "None"),
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event);
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@ -3575,13 +3570,11 @@ static int bond_inetaddr_event(struct notifier_block *this, unsigned long event,
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{
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struct in_ifaddr *ifa = ptr;
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struct net_device *vlan_dev, *event_dev = ifa->ifa_dev->dev;
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struct bond_net *bn = net_generic(dev_net(event_dev), bond_net_id);
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struct bonding *bond;
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struct vlan_entry *vlan;
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if (dev_net(ifa->ifa_dev->dev) != &init_net)
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return NOTIFY_DONE;
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list_for_each_entry(bond, &bond_dev_list, bond_list) {
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list_for_each_entry(bond, &bn->dev_list, bond_list) {
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if (bond->dev == event_dev) {
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switch (event) {
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case NETDEV_UP:
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@ -3950,7 +3943,7 @@ static int bond_do_ioctl(struct net_device *bond_dev, struct ifreq *ifr, int cmd
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if (!capable(CAP_NET_ADMIN))
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return -EPERM;
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slave_dev = dev_get_by_name(&init_net, ifr->ifr_slave);
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slave_dev = dev_get_by_name(dev_net(bond_dev), ifr->ifr_slave);
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pr_debug("slave_dev=%p: \n", slave_dev);
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@ -5031,6 +5024,7 @@ static void bond_set_lockdep_class(struct net_device *dev)
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static int bond_init(struct net_device *bond_dev)
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{
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struct bonding *bond = netdev_priv(bond_dev);
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struct bond_net *bn = net_generic(dev_net(bond_dev), bond_net_id);
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pr_debug("Begin bond_init for %s\n", bond_dev->name);
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@ -5043,7 +5037,7 @@ static int bond_init(struct net_device *bond_dev)
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netif_carrier_off(bond_dev);
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bond_create_proc_entry(bond);
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list_add_tail(&bond->bond_list, &bond_dev_list);
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list_add_tail(&bond->bond_list, &bn->dev_list);
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bond_prepare_sysfs_group(bond);
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return 0;
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@ -5071,7 +5065,7 @@ static struct rtnl_link_ops bond_link_ops __read_mostly = {
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* Caller must NOT hold rtnl_lock; we need to release it here before we
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* set up our sysfs entries.
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*/
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int bond_create(const char *name)
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int bond_create(struct net *net, const char *name)
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{
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struct net_device *bond_dev;
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int res;
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@ -5087,6 +5081,7 @@ int bond_create(const char *name)
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goto out;
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}
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dev_net_set(bond_dev, net);
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bond_dev->rtnl_link_ops = &bond_link_ops;
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if (!name) {
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@ -5105,6 +5100,46 @@ out_netdev:
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goto out;
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}
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static int bond_net_init(struct net *net)
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{
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struct bond_net *bn;
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int err;
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err = -ENOMEM;
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bn = kzalloc(sizeof(struct bond_net), GFP_KERNEL);
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if (bn == NULL)
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goto out;
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bn->net = net;
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INIT_LIST_HEAD(&bn->dev_list);
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err = net_assign_generic(net, bond_net_id, bn);
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if (err)
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goto out_free;
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bond_create_proc_dir(bn);
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out:
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return err;
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out_free:
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kfree(bn);
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goto out;
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}
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static void bond_net_exit(struct net *net)
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{
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struct bond_net *bn;
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bn = net_generic(net, bond_net_id);
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bond_destroy_proc_dir(bn);
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kfree(bn);
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}
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static struct pernet_operations bond_net_ops = {
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.init = bond_net_init,
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.exit = bond_net_exit,
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};
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static int __init bonding_init(void)
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{
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int i;
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@ -5116,14 +5151,16 @@ static int __init bonding_init(void)
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if (res)
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goto out;
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bond_create_proc_dir();
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res = register_pernet_gen_subsys(&bond_net_id, &bond_net_ops);
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if (res)
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goto out;
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res = rtnl_link_register(&bond_link_ops);
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if (res)
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goto err;
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for (i = 0; i < max_bonds; i++) {
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res = bond_create(NULL);
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res = bond_create(&init_net, NULL);
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if (res)
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goto err;
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}
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@ -5139,7 +5176,7 @@ out:
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return res;
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err:
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rtnl_link_unregister(&bond_link_ops);
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bond_destroy_proc_dir();
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unregister_pernet_gen_subsys(bond_net_id, &bond_net_ops);
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goto out;
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}
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@ -5153,7 +5190,7 @@ static void __exit bonding_exit(void)
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bond_destroy_sysfs();
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rtnl_link_unregister(&bond_link_ops);
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bond_destroy_proc_dir();
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unregister_pernet_gen_subsys(bond_net_id, &bond_net_ops);
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}
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module_init(bonding_init);
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@ -35,6 +35,8 @@
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#include <linux/rtnetlink.h>
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#include <linux/etherdevice.h>
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#include <net/net_namespace.h>
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#include <net/netns/generic.h>
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#include <linux/nsproxy.h>
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#include "bonding.h"
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@ -47,12 +49,14 @@
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*/
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static ssize_t bonding_show_bonds(struct class *cls, char *buf)
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{
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struct net *net = current->nsproxy->net_ns;
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struct bond_net *bn = net_generic(net, bond_net_id);
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int res = 0;
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struct bonding *bond;
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rtnl_lock();
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list_for_each_entry(bond, &bond_dev_list, bond_list) {
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list_for_each_entry(bond, &bn->dev_list, bond_list) {
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if (res > (PAGE_SIZE - IFNAMSIZ)) {
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/* not enough space for another interface name */
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if ((PAGE_SIZE - res) > 10)
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@ -69,11 +73,12 @@ static ssize_t bonding_show_bonds(struct class *cls, char *buf)
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return res;
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}
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static struct net_device *bond_get_by_name(const char *ifname)
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static struct net_device *bond_get_by_name(struct net *net, const char *ifname)
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{
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struct bond_net *bn = net_generic(net, bond_net_id);
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struct bonding *bond;
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list_for_each_entry(bond, &bond_dev_list, bond_list) {
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list_for_each_entry(bond, &bn->dev_list, bond_list) {
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if (strncmp(bond->dev->name, ifname, IFNAMSIZ) == 0)
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return bond->dev;
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}
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@ -91,6 +96,7 @@ static struct net_device *bond_get_by_name(const char *ifname)
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static ssize_t bonding_store_bonds(struct class *cls,
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const char *buffer, size_t count)
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{
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struct net *net = current->nsproxy->net_ns;
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char command[IFNAMSIZ + 1] = {0, };
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char *ifname;
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int rv, res = count;
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@ -104,7 +110,7 @@ static ssize_t bonding_store_bonds(struct class *cls,
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if (command[0] == '+') {
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pr_info(DRV_NAME
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": %s is being created...\n", ifname);
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rv = bond_create(ifname);
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rv = bond_create(net, ifname);
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if (rv) {
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pr_info(DRV_NAME ": Bond creation failed.\n");
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res = rv;
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@ -113,7 +119,7 @@ static ssize_t bonding_store_bonds(struct class *cls,
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struct net_device *bond_dev;
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rtnl_lock();
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bond_dev = bond_get_by_name(ifname);
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bond_dev = bond_get_by_name(net, ifname);
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if (bond_dev) {
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pr_info(DRV_NAME ": %s is being deleted...\n",
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ifname);
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@ -238,8 +244,7 @@ static ssize_t bonding_store_slaves(struct device *d,
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/* Got a slave name in ifname. Is it already in the list? */
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found = 0;
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/* FIXME: get netns from sysfs object */
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dev = __dev_get_by_name(&init_net, ifname);
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dev = __dev_get_by_name(dev_net(bond->dev), ifname);
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if (!dev) {
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pr_info(DRV_NAME
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": %s: Interface %s does not exist!\n",
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@ -30,8 +30,6 @@
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#define BOND_MAX_ARP_TARGETS 16
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extern struct list_head bond_dev_list;
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#define IS_UP(dev) \
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((((dev)->flags & IFF_UP) == IFF_UP) && \
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netif_running(dev) && \
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@ -327,7 +325,7 @@ static inline void bond_unset_master_alb_flags(struct bonding *bond)
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struct vlan_entry *bond_next_vlan(struct bonding *bond, struct vlan_entry *curr);
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int bond_dev_queue_xmit(struct bonding *bond, struct sk_buff *skb, struct net_device *slave_dev);
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int bond_create(const char *name);
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int bond_create(struct net *net, const char *name);
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int bond_release_and_destroy(struct net_device *bond_dev, struct net_device *slave_dev);
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int bond_create_sysfs(void);
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void bond_destroy_sysfs(void);
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@ -346,8 +344,16 @@ void bond_change_active_slave(struct bonding *bond, struct slave *new_active);
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void bond_register_arp(struct bonding *);
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void bond_unregister_arp(struct bonding *);
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struct bond_net {
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struct net * net; /* Associated network namespace */
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struct list_head dev_list;
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#ifdef CONFIG_PROC_FS
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struct proc_dir_entry * proc_dir;
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#endif
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};
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/* exported from bond_main.c */
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extern struct list_head bond_dev_list;
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extern int bond_net_id;
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extern const struct bond_parm_tbl bond_lacp_tbl[];
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extern const struct bond_parm_tbl bond_mode_tbl[];
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extern const struct bond_parm_tbl xmit_hashtype_tbl[];
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