mirror of https://github.com/Qortal/Brooklyn
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
5493 lines
150 KiB
5493 lines
150 KiB
/* |
|
* originally based on the dummy device. |
|
* |
|
* Copyright 1999, Thomas Davis, [email protected]. |
|
* Licensed under the GPL. Based on dummy.c, and eql.c devices. |
|
* |
|
* bonding.c: an Ethernet Bonding driver |
|
* |
|
* This is useful to talk to a Cisco EtherChannel compatible equipment: |
|
* Cisco 5500 |
|
* Sun Trunking (Solaris) |
|
* Alteon AceDirector Trunks |
|
* Linux Bonding |
|
* and probably many L2 switches ... |
|
* |
|
* How it works: |
|
* ifconfig bond0 ipaddress netmask up |
|
* will setup a network device, with an ip address. No mac address |
|
* will be assigned at this time. The hw mac address will come from |
|
* the first slave bonded to the channel. All slaves will then use |
|
* this hw mac address. |
|
* |
|
* ifconfig bond0 down |
|
* will release all slaves, marking them as down. |
|
* |
|
* ifenslave bond0 eth0 |
|
* will attach eth0 to bond0 as a slave. eth0 hw mac address will either |
|
* a: be used as initial mac address |
|
* b: if a hw mac address already is there, eth0's hw mac address |
|
* will then be set from bond0. |
|
* |
|
*/ |
|
|
|
#include <linux/kernel.h> |
|
#include <linux/module.h> |
|
#include <linux/types.h> |
|
#include <linux/fcntl.h> |
|
#include <linux/interrupt.h> |
|
#include <linux/ptrace.h> |
|
#include <linux/ioport.h> |
|
#include <linux/in.h> |
|
#include <net/ip.h> |
|
#include <linux/ip.h> |
|
#include <linux/icmp.h> |
|
#include <linux/icmpv6.h> |
|
#include <linux/tcp.h> |
|
#include <linux/udp.h> |
|
#include <linux/slab.h> |
|
#include <linux/string.h> |
|
#include <linux/init.h> |
|
#include <linux/timer.h> |
|
#include <linux/socket.h> |
|
#include <linux/ctype.h> |
|
#include <linux/inet.h> |
|
#include <linux/bitops.h> |
|
#include <linux/io.h> |
|
#include <asm/dma.h> |
|
#include <linux/uaccess.h> |
|
#include <linux/errno.h> |
|
#include <linux/netdevice.h> |
|
#include <linux/inetdevice.h> |
|
#include <linux/igmp.h> |
|
#include <linux/etherdevice.h> |
|
#include <linux/skbuff.h> |
|
#include <net/sock.h> |
|
#include <linux/rtnetlink.h> |
|
#include <linux/smp.h> |
|
#include <linux/if_ether.h> |
|
#include <net/arp.h> |
|
#include <linux/mii.h> |
|
#include <linux/ethtool.h> |
|
#include <linux/if_vlan.h> |
|
#include <linux/if_bonding.h> |
|
#include <linux/jiffies.h> |
|
#include <linux/preempt.h> |
|
#include <net/route.h> |
|
#include <net/net_namespace.h> |
|
#include <net/netns/generic.h> |
|
#include <net/pkt_sched.h> |
|
#include <linux/rculist.h> |
|
#include <net/flow_dissector.h> |
|
#include <net/xfrm.h> |
|
#include <net/bonding.h> |
|
#include <net/bond_3ad.h> |
|
#include <net/bond_alb.h> |
|
|
|
#include "bonding_priv.h" |
|
|
|
/*---------------------------- Module parameters ----------------------------*/ |
|
|
|
/* monitor all links that often (in milliseconds). <=0 disables monitoring */ |
|
|
|
static int max_bonds = BOND_DEFAULT_MAX_BONDS; |
|
static int tx_queues = BOND_DEFAULT_TX_QUEUES; |
|
static int num_peer_notif = 1; |
|
static int miimon; |
|
static int updelay; |
|
static int downdelay; |
|
static int use_carrier = 1; |
|
static char *mode; |
|
static char *primary; |
|
static char *primary_reselect; |
|
static char *lacp_rate; |
|
static int min_links; |
|
static char *ad_select; |
|
static char *xmit_hash_policy; |
|
static int arp_interval; |
|
static char *arp_ip_target[BOND_MAX_ARP_TARGETS]; |
|
static char *arp_validate; |
|
static char *arp_all_targets; |
|
static char *fail_over_mac; |
|
static int all_slaves_active; |
|
static struct bond_params bonding_defaults; |
|
static int resend_igmp = BOND_DEFAULT_RESEND_IGMP; |
|
static int packets_per_slave = 1; |
|
static int lp_interval = BOND_ALB_DEFAULT_LP_INTERVAL; |
|
|
|
module_param(max_bonds, int, 0); |
|
MODULE_PARM_DESC(max_bonds, "Max number of bonded devices"); |
|
module_param(tx_queues, int, 0); |
|
MODULE_PARM_DESC(tx_queues, "Max number of transmit queues (default = 16)"); |
|
module_param_named(num_grat_arp, num_peer_notif, int, 0644); |
|
MODULE_PARM_DESC(num_grat_arp, "Number of peer notifications to send on " |
|
"failover event (alias of num_unsol_na)"); |
|
module_param_named(num_unsol_na, num_peer_notif, int, 0644); |
|
MODULE_PARM_DESC(num_unsol_na, "Number of peer notifications to send on " |
|
"failover event (alias of num_grat_arp)"); |
|
module_param(miimon, int, 0); |
|
MODULE_PARM_DESC(miimon, "Link check interval in milliseconds"); |
|
module_param(updelay, int, 0); |
|
MODULE_PARM_DESC(updelay, "Delay before considering link up, in milliseconds"); |
|
module_param(downdelay, int, 0); |
|
MODULE_PARM_DESC(downdelay, "Delay before considering link down, " |
|
"in milliseconds"); |
|
module_param(use_carrier, int, 0); |
|
MODULE_PARM_DESC(use_carrier, "Use netif_carrier_ok (vs MII ioctls) in miimon; " |
|
"0 for off, 1 for on (default)"); |
|
module_param(mode, charp, 0); |
|
MODULE_PARM_DESC(mode, "Mode of operation; 0 for balance-rr, " |
|
"1 for active-backup, 2 for balance-xor, " |
|
"3 for broadcast, 4 for 802.3ad, 5 for balance-tlb, " |
|
"6 for balance-alb"); |
|
module_param(primary, charp, 0); |
|
MODULE_PARM_DESC(primary, "Primary network device to use"); |
|
module_param(primary_reselect, charp, 0); |
|
MODULE_PARM_DESC(primary_reselect, "Reselect primary slave " |
|
"once it comes up; " |
|
"0 for always (default), " |
|
"1 for only if speed of primary is " |
|
"better, " |
|
"2 for only on active slave " |
|
"failure"); |
|
module_param(lacp_rate, charp, 0); |
|
MODULE_PARM_DESC(lacp_rate, "LACPDU tx rate to request from 802.3ad partner; " |
|
"0 for slow, 1 for fast"); |
|
module_param(ad_select, charp, 0); |
|
MODULE_PARM_DESC(ad_select, "802.3ad aggregation selection logic; " |
|
"0 for stable (default), 1 for bandwidth, " |
|
"2 for count"); |
|
module_param(min_links, int, 0); |
|
MODULE_PARM_DESC(min_links, "Minimum number of available links before turning on carrier"); |
|
|
|
module_param(xmit_hash_policy, charp, 0); |
|
MODULE_PARM_DESC(xmit_hash_policy, "balance-alb, balance-tlb, balance-xor, 802.3ad hashing method; " |
|
"0 for layer 2 (default), 1 for layer 3+4, " |
|
"2 for layer 2+3, 3 for encap layer 2+3, " |
|
"4 for encap layer 3+4"); |
|
module_param(arp_interval, int, 0); |
|
MODULE_PARM_DESC(arp_interval, "arp interval in milliseconds"); |
|
module_param_array(arp_ip_target, charp, NULL, 0); |
|
MODULE_PARM_DESC(arp_ip_target, "arp targets in n.n.n.n form"); |
|
module_param(arp_validate, charp, 0); |
|
MODULE_PARM_DESC(arp_validate, "validate src/dst of ARP probes; " |
|
"0 for none (default), 1 for active, " |
|
"2 for backup, 3 for all"); |
|
module_param(arp_all_targets, charp, 0); |
|
MODULE_PARM_DESC(arp_all_targets, "fail on any/all arp targets timeout; 0 for any (default), 1 for all"); |
|
module_param(fail_over_mac, charp, 0); |
|
MODULE_PARM_DESC(fail_over_mac, "For active-backup, do not set all slaves to " |
|
"the same MAC; 0 for none (default), " |
|
"1 for active, 2 for follow"); |
|
module_param(all_slaves_active, int, 0); |
|
MODULE_PARM_DESC(all_slaves_active, "Keep all frames received on an interface " |
|
"by setting active flag for all slaves; " |
|
"0 for never (default), 1 for always."); |
|
module_param(resend_igmp, int, 0); |
|
MODULE_PARM_DESC(resend_igmp, "Number of IGMP membership reports to send on " |
|
"link failure"); |
|
module_param(packets_per_slave, int, 0); |
|
MODULE_PARM_DESC(packets_per_slave, "Packets to send per slave in balance-rr " |
|
"mode; 0 for a random slave, 1 packet per " |
|
"slave (default), >1 packets per slave."); |
|
module_param(lp_interval, uint, 0); |
|
MODULE_PARM_DESC(lp_interval, "The number of seconds between instances where " |
|
"the bonding driver sends learning packets to " |
|
"each slaves peer switch. The default is 1."); |
|
|
|
/*----------------------------- Global variables ----------------------------*/ |
|
|
|
#ifdef CONFIG_NET_POLL_CONTROLLER |
|
atomic_t netpoll_block_tx = ATOMIC_INIT(0); |
|
#endif |
|
|
|
unsigned int bond_net_id __read_mostly; |
|
|
|
static const struct flow_dissector_key flow_keys_bonding_keys[] = { |
|
{ |
|
.key_id = FLOW_DISSECTOR_KEY_CONTROL, |
|
.offset = offsetof(struct flow_keys, control), |
|
}, |
|
{ |
|
.key_id = FLOW_DISSECTOR_KEY_BASIC, |
|
.offset = offsetof(struct flow_keys, basic), |
|
}, |
|
{ |
|
.key_id = FLOW_DISSECTOR_KEY_IPV4_ADDRS, |
|
.offset = offsetof(struct flow_keys, addrs.v4addrs), |
|
}, |
|
{ |
|
.key_id = FLOW_DISSECTOR_KEY_IPV6_ADDRS, |
|
.offset = offsetof(struct flow_keys, addrs.v6addrs), |
|
}, |
|
{ |
|
.key_id = FLOW_DISSECTOR_KEY_TIPC, |
|
.offset = offsetof(struct flow_keys, addrs.tipckey), |
|
}, |
|
{ |
|
.key_id = FLOW_DISSECTOR_KEY_PORTS, |
|
.offset = offsetof(struct flow_keys, ports), |
|
}, |
|
{ |
|
.key_id = FLOW_DISSECTOR_KEY_ICMP, |
|
.offset = offsetof(struct flow_keys, icmp), |
|
}, |
|
{ |
|
.key_id = FLOW_DISSECTOR_KEY_VLAN, |
|
.offset = offsetof(struct flow_keys, vlan), |
|
}, |
|
{ |
|
.key_id = FLOW_DISSECTOR_KEY_FLOW_LABEL, |
|
.offset = offsetof(struct flow_keys, tags), |
|
}, |
|
{ |
|
.key_id = FLOW_DISSECTOR_KEY_GRE_KEYID, |
|
.offset = offsetof(struct flow_keys, keyid), |
|
}, |
|
}; |
|
|
|
static struct flow_dissector flow_keys_bonding __read_mostly; |
|
|
|
/*-------------------------- Forward declarations ---------------------------*/ |
|
|
|
static int bond_init(struct net_device *bond_dev); |
|
static void bond_uninit(struct net_device *bond_dev); |
|
static void bond_get_stats(struct net_device *bond_dev, |
|
struct rtnl_link_stats64 *stats); |
|
static void bond_slave_arr_handler(struct work_struct *work); |
|
static bool bond_time_in_interval(struct bonding *bond, unsigned long last_act, |
|
int mod); |
|
static void bond_netdev_notify_work(struct work_struct *work); |
|
|
|
/*---------------------------- General routines -----------------------------*/ |
|
|
|
const char *bond_mode_name(int mode) |
|
{ |
|
static const char *names[] = { |
|
[BOND_MODE_ROUNDROBIN] = "load balancing (round-robin)", |
|
[BOND_MODE_ACTIVEBACKUP] = "fault-tolerance (active-backup)", |
|
[BOND_MODE_XOR] = "load balancing (xor)", |
|
[BOND_MODE_BROADCAST] = "fault-tolerance (broadcast)", |
|
[BOND_MODE_8023AD] = "IEEE 802.3ad Dynamic link aggregation", |
|
[BOND_MODE_TLB] = "transmit load balancing", |
|
[BOND_MODE_ALB] = "adaptive load balancing", |
|
}; |
|
|
|
if (mode < BOND_MODE_ROUNDROBIN || mode > BOND_MODE_ALB) |
|
return "unknown"; |
|
|
|
return names[mode]; |
|
} |
|
|
|
/** |
|
* bond_dev_queue_xmit - Prepare skb for xmit. |
|
* |
|
* @bond: bond device that got this skb for tx. |
|
* @skb: hw accel VLAN tagged skb to transmit |
|
* @slave_dev: slave that is supposed to xmit this skbuff |
|
*/ |
|
netdev_tx_t bond_dev_queue_xmit(struct bonding *bond, struct sk_buff *skb, |
|
struct net_device *slave_dev) |
|
{ |
|
skb->dev = slave_dev; |
|
|
|
BUILD_BUG_ON(sizeof(skb->queue_mapping) != |
|
sizeof(qdisc_skb_cb(skb)->slave_dev_queue_mapping)); |
|
skb_set_queue_mapping(skb, qdisc_skb_cb(skb)->slave_dev_queue_mapping); |
|
|
|
if (unlikely(netpoll_tx_running(bond->dev))) |
|
return bond_netpoll_send_skb(bond_get_slave_by_dev(bond, slave_dev), skb); |
|
|
|
return dev_queue_xmit(skb); |
|
} |
|
|
|
/*---------------------------------- VLAN -----------------------------------*/ |
|
|
|
/* 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, |
|
* c. Holding a lock with BH disabled while directly calling a base driver |
|
* entry point is generally a BAD idea. |
|
* |
|
* The design of synchronization/protection for this operation in the 8021q |
|
* module is good for one or more VLAN devices over a single physical device |
|
* and cannot be extended for a teaming solution like bonding, so there is a |
|
* potential race condition here where a net device from the vlan group might |
|
* be referenced (either by a base driver or the 8021q code) while it is being |
|
* removed from the system. However, it turns out we're not making matters |
|
* worse, and if it works for regular VLAN usage it will work here too. |
|
*/ |
|
|
|
/** |
|
* bond_vlan_rx_add_vid - Propagates adding an id to slaves |
|
* @bond_dev: bonding net device that got called |
|
* @proto: network protocol ID |
|
* @vid: vlan id being added |
|
*/ |
|
static int bond_vlan_rx_add_vid(struct net_device *bond_dev, |
|
__be16 proto, u16 vid) |
|
{ |
|
struct bonding *bond = netdev_priv(bond_dev); |
|
struct slave *slave, *rollback_slave; |
|
struct list_head *iter; |
|
int res; |
|
|
|
bond_for_each_slave(bond, slave, iter) { |
|
res = vlan_vid_add(slave->dev, proto, vid); |
|
if (res) |
|
goto unwind; |
|
} |
|
|
|
return 0; |
|
|
|
unwind: |
|
/* unwind to the slave that failed */ |
|
bond_for_each_slave(bond, rollback_slave, iter) { |
|
if (rollback_slave == slave) |
|
break; |
|
|
|
vlan_vid_del(rollback_slave->dev, proto, vid); |
|
} |
|
|
|
return res; |
|
} |
|
|
|
/** |
|
* bond_vlan_rx_kill_vid - Propagates deleting an id to slaves |
|
* @bond_dev: bonding net device that got called |
|
* @proto: network protocol ID |
|
* @vid: vlan id being removed |
|
*/ |
|
static int bond_vlan_rx_kill_vid(struct net_device *bond_dev, |
|
__be16 proto, u16 vid) |
|
{ |
|
struct bonding *bond = netdev_priv(bond_dev); |
|
struct list_head *iter; |
|
struct slave *slave; |
|
|
|
bond_for_each_slave(bond, slave, iter) |
|
vlan_vid_del(slave->dev, proto, vid); |
|
|
|
if (bond_is_lb(bond)) |
|
bond_alb_clear_vlan(bond, vid); |
|
|
|
return 0; |
|
} |
|
|
|
/*---------------------------------- XFRM -----------------------------------*/ |
|
|
|
#ifdef CONFIG_XFRM_OFFLOAD |
|
/** |
|
* bond_ipsec_add_sa - program device with a security association |
|
* @xs: pointer to transformer state struct |
|
**/ |
|
static int bond_ipsec_add_sa(struct xfrm_state *xs) |
|
{ |
|
struct net_device *bond_dev = xs->xso.dev; |
|
struct bond_ipsec *ipsec; |
|
struct bonding *bond; |
|
struct slave *slave; |
|
int err; |
|
|
|
if (!bond_dev) |
|
return -EINVAL; |
|
|
|
rcu_read_lock(); |
|
bond = netdev_priv(bond_dev); |
|
slave = rcu_dereference(bond->curr_active_slave); |
|
if (!slave) { |
|
rcu_read_unlock(); |
|
return -ENODEV; |
|
} |
|
|
|
if (!slave->dev->xfrmdev_ops || |
|
!slave->dev->xfrmdev_ops->xdo_dev_state_add || |
|
netif_is_bond_master(slave->dev)) { |
|
slave_warn(bond_dev, slave->dev, "Slave does not support ipsec offload\n"); |
|
rcu_read_unlock(); |
|
return -EINVAL; |
|
} |
|
|
|
ipsec = kmalloc(sizeof(*ipsec), GFP_ATOMIC); |
|
if (!ipsec) { |
|
rcu_read_unlock(); |
|
return -ENOMEM; |
|
} |
|
xs->xso.real_dev = slave->dev; |
|
|
|
err = slave->dev->xfrmdev_ops->xdo_dev_state_add(xs); |
|
if (!err) { |
|
ipsec->xs = xs; |
|
INIT_LIST_HEAD(&ipsec->list); |
|
spin_lock_bh(&bond->ipsec_lock); |
|
list_add(&ipsec->list, &bond->ipsec_list); |
|
spin_unlock_bh(&bond->ipsec_lock); |
|
} else { |
|
kfree(ipsec); |
|
} |
|
rcu_read_unlock(); |
|
return err; |
|
} |
|
|
|
static void bond_ipsec_add_sa_all(struct bonding *bond) |
|
{ |
|
struct net_device *bond_dev = bond->dev; |
|
struct bond_ipsec *ipsec; |
|
struct slave *slave; |
|
|
|
rcu_read_lock(); |
|
slave = rcu_dereference(bond->curr_active_slave); |
|
if (!slave) |
|
goto out; |
|
|
|
if (!slave->dev->xfrmdev_ops || |
|
!slave->dev->xfrmdev_ops->xdo_dev_state_add || |
|
netif_is_bond_master(slave->dev)) { |
|
spin_lock_bh(&bond->ipsec_lock); |
|
if (!list_empty(&bond->ipsec_list)) |
|
slave_warn(bond_dev, slave->dev, |
|
"%s: no slave xdo_dev_state_add\n", |
|
__func__); |
|
spin_unlock_bh(&bond->ipsec_lock); |
|
goto out; |
|
} |
|
|
|
spin_lock_bh(&bond->ipsec_lock); |
|
list_for_each_entry(ipsec, &bond->ipsec_list, list) { |
|
ipsec->xs->xso.real_dev = slave->dev; |
|
if (slave->dev->xfrmdev_ops->xdo_dev_state_add(ipsec->xs)) { |
|
slave_warn(bond_dev, slave->dev, "%s: failed to add SA\n", __func__); |
|
ipsec->xs->xso.real_dev = NULL; |
|
} |
|
} |
|
spin_unlock_bh(&bond->ipsec_lock); |
|
out: |
|
rcu_read_unlock(); |
|
} |
|
|
|
/** |
|
* bond_ipsec_del_sa - clear out this specific SA |
|
* @xs: pointer to transformer state struct |
|
**/ |
|
static void bond_ipsec_del_sa(struct xfrm_state *xs) |
|
{ |
|
struct net_device *bond_dev = xs->xso.dev; |
|
struct bond_ipsec *ipsec; |
|
struct bonding *bond; |
|
struct slave *slave; |
|
|
|
if (!bond_dev) |
|
return; |
|
|
|
rcu_read_lock(); |
|
bond = netdev_priv(bond_dev); |
|
slave = rcu_dereference(bond->curr_active_slave); |
|
|
|
if (!slave) |
|
goto out; |
|
|
|
if (!xs->xso.real_dev) |
|
goto out; |
|
|
|
WARN_ON(xs->xso.real_dev != slave->dev); |
|
|
|
if (!slave->dev->xfrmdev_ops || |
|
!slave->dev->xfrmdev_ops->xdo_dev_state_delete || |
|
netif_is_bond_master(slave->dev)) { |
|
slave_warn(bond_dev, slave->dev, "%s: no slave xdo_dev_state_delete\n", __func__); |
|
goto out; |
|
} |
|
|
|
slave->dev->xfrmdev_ops->xdo_dev_state_delete(xs); |
|
out: |
|
spin_lock_bh(&bond->ipsec_lock); |
|
list_for_each_entry(ipsec, &bond->ipsec_list, list) { |
|
if (ipsec->xs == xs) { |
|
list_del(&ipsec->list); |
|
kfree(ipsec); |
|
break; |
|
} |
|
} |
|
spin_unlock_bh(&bond->ipsec_lock); |
|
rcu_read_unlock(); |
|
} |
|
|
|
static void bond_ipsec_del_sa_all(struct bonding *bond) |
|
{ |
|
struct net_device *bond_dev = bond->dev; |
|
struct bond_ipsec *ipsec; |
|
struct slave *slave; |
|
|
|
rcu_read_lock(); |
|
slave = rcu_dereference(bond->curr_active_slave); |
|
if (!slave) { |
|
rcu_read_unlock(); |
|
return; |
|
} |
|
|
|
spin_lock_bh(&bond->ipsec_lock); |
|
list_for_each_entry(ipsec, &bond->ipsec_list, list) { |
|
if (!ipsec->xs->xso.real_dev) |
|
continue; |
|
|
|
if (!slave->dev->xfrmdev_ops || |
|
!slave->dev->xfrmdev_ops->xdo_dev_state_delete || |
|
netif_is_bond_master(slave->dev)) { |
|
slave_warn(bond_dev, slave->dev, |
|
"%s: no slave xdo_dev_state_delete\n", |
|
__func__); |
|
} else { |
|
slave->dev->xfrmdev_ops->xdo_dev_state_delete(ipsec->xs); |
|
} |
|
ipsec->xs->xso.real_dev = NULL; |
|
} |
|
spin_unlock_bh(&bond->ipsec_lock); |
|
rcu_read_unlock(); |
|
} |
|
|
|
/** |
|
* bond_ipsec_offload_ok - can this packet use the xfrm hw offload |
|
* @skb: current data packet |
|
* @xs: pointer to transformer state struct |
|
**/ |
|
static bool bond_ipsec_offload_ok(struct sk_buff *skb, struct xfrm_state *xs) |
|
{ |
|
struct net_device *bond_dev = xs->xso.dev; |
|
struct net_device *real_dev; |
|
struct slave *curr_active; |
|
struct bonding *bond; |
|
int err; |
|
|
|
bond = netdev_priv(bond_dev); |
|
rcu_read_lock(); |
|
curr_active = rcu_dereference(bond->curr_active_slave); |
|
real_dev = curr_active->dev; |
|
|
|
if (BOND_MODE(bond) != BOND_MODE_ACTIVEBACKUP) { |
|
err = false; |
|
goto out; |
|
} |
|
|
|
if (!xs->xso.real_dev) { |
|
err = false; |
|
goto out; |
|
} |
|
|
|
if (!real_dev->xfrmdev_ops || |
|
!real_dev->xfrmdev_ops->xdo_dev_offload_ok || |
|
netif_is_bond_master(real_dev)) { |
|
err = false; |
|
goto out; |
|
} |
|
|
|
err = real_dev->xfrmdev_ops->xdo_dev_offload_ok(skb, xs); |
|
out: |
|
rcu_read_unlock(); |
|
return err; |
|
} |
|
|
|
static const struct xfrmdev_ops bond_xfrmdev_ops = { |
|
.xdo_dev_state_add = bond_ipsec_add_sa, |
|
.xdo_dev_state_delete = bond_ipsec_del_sa, |
|
.xdo_dev_offload_ok = bond_ipsec_offload_ok, |
|
}; |
|
#endif /* CONFIG_XFRM_OFFLOAD */ |
|
|
|
/*------------------------------- Link status -------------------------------*/ |
|
|
|
/* 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. |
|
* |
|
* Returns zero if carrier state does not change, nonzero if it does. |
|
*/ |
|
int bond_set_carrier(struct bonding *bond) |
|
{ |
|
struct list_head *iter; |
|
struct slave *slave; |
|
|
|
if (!bond_has_slaves(bond)) |
|
goto down; |
|
|
|
if (BOND_MODE(bond) == BOND_MODE_8023AD) |
|
return bond_3ad_set_carrier(bond); |
|
|
|
bond_for_each_slave(bond, slave, iter) { |
|
if (slave->link == BOND_LINK_UP) { |
|
if (!netif_carrier_ok(bond->dev)) { |
|
netif_carrier_on(bond->dev); |
|
return 1; |
|
} |
|
return 0; |
|
} |
|
} |
|
|
|
down: |
|
if (netif_carrier_ok(bond->dev)) { |
|
netif_carrier_off(bond->dev); |
|
return 1; |
|
} |
|
return 0; |
|
} |
|
|
|
/* 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. Return 1 if speed or duplex settings are |
|
* UNKNOWN; 0 otherwise. |
|
*/ |
|
static int bond_update_speed_duplex(struct slave *slave) |
|
{ |
|
struct net_device *slave_dev = slave->dev; |
|
struct ethtool_link_ksettings ecmd; |
|
int res; |
|
|
|
slave->speed = SPEED_UNKNOWN; |
|
slave->duplex = DUPLEX_UNKNOWN; |
|
|
|
res = __ethtool_get_link_ksettings(slave_dev, &ecmd); |
|
if (res < 0) |
|
return 1; |
|
if (ecmd.base.speed == 0 || ecmd.base.speed == ((__u32)-1)) |
|
return 1; |
|
switch (ecmd.base.duplex) { |
|
case DUPLEX_FULL: |
|
case DUPLEX_HALF: |
|
break; |
|
default: |
|
return 1; |
|
} |
|
|
|
slave->speed = ecmd.base.speed; |
|
slave->duplex = ecmd.base.duplex; |
|
|
|
return 0; |
|
} |
|
|
|
const char *bond_slave_link_status(s8 link) |
|
{ |
|
switch (link) { |
|
case BOND_LINK_UP: |
|
return "up"; |
|
case BOND_LINK_FAIL: |
|
return "going down"; |
|
case BOND_LINK_DOWN: |
|
return "down"; |
|
case BOND_LINK_BACK: |
|
return "going back"; |
|
default: |
|
return "unknown"; |
|
} |
|
} |
|
|
|
/* 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. |
|
* |
|
* Return either BMSR_LSTATUS, meaning that the link is up (or we |
|
* can't tell and just pretend it is), or 0, meaning that the link is |
|
* down. |
|
* |
|
* If reporting is non-zero, instead of faking link up, return -1 if |
|
* both ETHTOOL and MII ioctls fail (meaning the device does not |
|
* support them). If use_carrier is set, return whatever it says. |
|
* It'd be nice if there was a good way to tell if a driver supports |
|
* netif_carrier, but there really isn't. |
|
*/ |
|
static int bond_check_dev_link(struct bonding *bond, |
|
struct net_device *slave_dev, int reporting) |
|
{ |
|
const struct net_device_ops *slave_ops = slave_dev->netdev_ops; |
|
int (*ioctl)(struct net_device *, struct ifreq *, int); |
|
struct ifreq ifr; |
|
struct mii_ioctl_data *mii; |
|
|
|
if (!reporting && !netif_running(slave_dev)) |
|
return 0; |
|
|
|
if (bond->params.use_carrier) |
|
return netif_carrier_ok(slave_dev) ? BMSR_LSTATUS : 0; |
|
|
|
/* Try to get link status using Ethtool first. */ |
|
if (slave_dev->ethtool_ops->get_link) |
|
return slave_dev->ethtool_ops->get_link(slave_dev) ? |
|
BMSR_LSTATUS : 0; |
|
|
|
/* 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 |
|
* register; not all network drivers (e.g., e100) |
|
* support that. |
|
*/ |
|
|
|
/* Yes, the mii is overlaid on the ifreq.ifr_ifru */ |
|
strncpy(ifr.ifr_name, slave_dev->name, IFNAMSIZ); |
|
mii = if_mii(&ifr); |
|
if (ioctl(slave_dev, &ifr, SIOCGMIIPHY) == 0) { |
|
mii->reg_num = MII_BMSR; |
|
if (ioctl(slave_dev, &ifr, SIOCGMIIREG) == 0) |
|
return mii->val_out & BMSR_LSTATUS; |
|
} |
|
} |
|
|
|
/* 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. |
|
*/ |
|
return reporting ? -1 : BMSR_LSTATUS; |
|
} |
|
|
|
/*----------------------------- Multicast list ------------------------------*/ |
|
|
|
/* Push the promiscuity flag down to appropriate slaves */ |
|
static int bond_set_promiscuity(struct bonding *bond, int inc) |
|
{ |
|
struct list_head *iter; |
|
int err = 0; |
|
|
|
if (bond_uses_primary(bond)) { |
|
struct slave *curr_active = rtnl_dereference(bond->curr_active_slave); |
|
|
|
if (curr_active) |
|
err = dev_set_promiscuity(curr_active->dev, inc); |
|
} else { |
|
struct slave *slave; |
|
|
|
bond_for_each_slave(bond, slave, iter) { |
|
err = dev_set_promiscuity(slave->dev, inc); |
|
if (err) |
|
return err; |
|
} |
|
} |
|
return err; |
|
} |
|
|
|
/* Push the allmulti flag down to all slaves */ |
|
static int bond_set_allmulti(struct bonding *bond, int inc) |
|
{ |
|
struct list_head *iter; |
|
int err = 0; |
|
|
|
if (bond_uses_primary(bond)) { |
|
struct slave *curr_active = rtnl_dereference(bond->curr_active_slave); |
|
|
|
if (curr_active) |
|
err = dev_set_allmulti(curr_active->dev, inc); |
|
} else { |
|
struct slave *slave; |
|
|
|
bond_for_each_slave(bond, slave, iter) { |
|
err = dev_set_allmulti(slave->dev, inc); |
|
if (err) |
|
return err; |
|
} |
|
} |
|
return err; |
|
} |
|
|
|
/* Retrieve the list of registered multicast addresses for the bonding |
|
* device and retransmit an IGMP JOIN request to the current active |
|
* slave. |
|
*/ |
|
static void bond_resend_igmp_join_requests_delayed(struct work_struct *work) |
|
{ |
|
struct bonding *bond = container_of(work, struct bonding, |
|
mcast_work.work); |
|
|
|
if (!rtnl_trylock()) { |
|
queue_delayed_work(bond->wq, &bond->mcast_work, 1); |
|
return; |
|
} |
|
call_netdevice_notifiers(NETDEV_RESEND_IGMP, bond->dev); |
|
|
|
if (bond->igmp_retrans > 1) { |
|
bond->igmp_retrans--; |
|
queue_delayed_work(bond->wq, &bond->mcast_work, HZ/5); |
|
} |
|
rtnl_unlock(); |
|
} |
|
|
|
/* Flush bond's hardware addresses from slave */ |
|
static void bond_hw_addr_flush(struct net_device *bond_dev, |
|
struct net_device *slave_dev) |
|
{ |
|
struct bonding *bond = netdev_priv(bond_dev); |
|
|
|
dev_uc_unsync(slave_dev, bond_dev); |
|
dev_mc_unsync(slave_dev, bond_dev); |
|
|
|
if (BOND_MODE(bond) == BOND_MODE_8023AD) { |
|
/* del lacpdu mc addr from mc list */ |
|
u8 lacpdu_multicast[ETH_ALEN] = MULTICAST_LACPDU_ADDR; |
|
|
|
dev_mc_del(slave_dev, lacpdu_multicast); |
|
} |
|
} |
|
|
|
/*--------------------------- Active slave change ---------------------------*/ |
|
|
|
/* Update the hardware address list and promisc/allmulti for the new and |
|
* old active slaves (if any). Modes that are not using primary keep all |
|
* slaves up date at all times; only the modes that use primary need to call |
|
* this function to swap these settings during a failover. |
|
*/ |
|
static void bond_hw_addr_swap(struct bonding *bond, struct slave *new_active, |
|
struct slave *old_active) |
|
{ |
|
if (old_active) { |
|
if (bond->dev->flags & IFF_PROMISC) |
|
dev_set_promiscuity(old_active->dev, -1); |
|
|
|
if (bond->dev->flags & IFF_ALLMULTI) |
|
dev_set_allmulti(old_active->dev, -1); |
|
|
|
bond_hw_addr_flush(bond->dev, old_active->dev); |
|
} |
|
|
|
if (new_active) { |
|
/* FIXME: Signal errors upstream. */ |
|
if (bond->dev->flags & IFF_PROMISC) |
|
dev_set_promiscuity(new_active->dev, 1); |
|
|
|
if (bond->dev->flags & IFF_ALLMULTI) |
|
dev_set_allmulti(new_active->dev, 1); |
|
|
|
netif_addr_lock_bh(bond->dev); |
|
dev_uc_sync(new_active->dev, bond->dev); |
|
dev_mc_sync(new_active->dev, bond->dev); |
|
netif_addr_unlock_bh(bond->dev); |
|
} |
|
} |
|
|
|
/** |
|
* bond_set_dev_addr - clone slave's address to bond |
|
* @bond_dev: bond net device |
|
* @slave_dev: slave net device |
|
* |
|
* Should be called with RTNL held. |
|
*/ |
|
static int bond_set_dev_addr(struct net_device *bond_dev, |
|
struct net_device *slave_dev) |
|
{ |
|
int err; |
|
|
|
slave_dbg(bond_dev, slave_dev, "bond_dev=%p slave_dev=%p slave_dev->addr_len=%d\n", |
|
bond_dev, slave_dev, slave_dev->addr_len); |
|
err = dev_pre_changeaddr_notify(bond_dev, slave_dev->dev_addr, NULL); |
|
if (err) |
|
return err; |
|
|
|
memcpy(bond_dev->dev_addr, slave_dev->dev_addr, slave_dev->addr_len); |
|
bond_dev->addr_assign_type = NET_ADDR_STOLEN; |
|
call_netdevice_notifiers(NETDEV_CHANGEADDR, bond_dev); |
|
return 0; |
|
} |
|
|
|
static struct slave *bond_get_old_active(struct bonding *bond, |
|
struct slave *new_active) |
|
{ |
|
struct slave *slave; |
|
struct list_head *iter; |
|
|
|
bond_for_each_slave(bond, slave, iter) { |
|
if (slave == new_active) |
|
continue; |
|
|
|
if (ether_addr_equal(bond->dev->dev_addr, slave->dev->dev_addr)) |
|
return slave; |
|
} |
|
|
|
return NULL; |
|
} |
|
|
|
/* bond_do_fail_over_mac |
|
* |
|
* Perform special MAC address swapping for fail_over_mac settings |
|
* |
|
* Called with RTNL |
|
*/ |
|
static void bond_do_fail_over_mac(struct bonding *bond, |
|
struct slave *new_active, |
|
struct slave *old_active) |
|
{ |
|
u8 tmp_mac[MAX_ADDR_LEN]; |
|
struct sockaddr_storage ss; |
|
int rv; |
|
|
|
switch (bond->params.fail_over_mac) { |
|
case BOND_FOM_ACTIVE: |
|
if (new_active) { |
|
rv = bond_set_dev_addr(bond->dev, new_active->dev); |
|
if (rv) |
|
slave_err(bond->dev, new_active->dev, "Error %d setting bond MAC from slave\n", |
|
-rv); |
|
} |
|
break; |
|
case BOND_FOM_FOLLOW: |
|
/* 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; |
|
|
|
if (!old_active) |
|
old_active = bond_get_old_active(bond, new_active); |
|
|
|
if (old_active) { |
|
bond_hw_addr_copy(tmp_mac, new_active->dev->dev_addr, |
|
new_active->dev->addr_len); |
|
bond_hw_addr_copy(ss.__data, |
|
old_active->dev->dev_addr, |
|
old_active->dev->addr_len); |
|
ss.ss_family = new_active->dev->type; |
|
} else { |
|
bond_hw_addr_copy(ss.__data, bond->dev->dev_addr, |
|
bond->dev->addr_len); |
|
ss.ss_family = bond->dev->type; |
|
} |
|
|
|
rv = dev_set_mac_address(new_active->dev, |
|
(struct sockaddr *)&ss, NULL); |
|
if (rv) { |
|
slave_err(bond->dev, new_active->dev, "Error %d setting MAC of new active slave\n", |
|
-rv); |
|
goto out; |
|
} |
|
|
|
if (!old_active) |
|
goto out; |
|
|
|
bond_hw_addr_copy(ss.__data, tmp_mac, |
|
new_active->dev->addr_len); |
|
ss.ss_family = old_active->dev->type; |
|
|
|
rv = dev_set_mac_address(old_active->dev, |
|
(struct sockaddr *)&ss, NULL); |
|
if (rv) |
|
slave_err(bond->dev, old_active->dev, "Error %d setting MAC of old active slave\n", |
|
-rv); |
|
out: |
|
break; |
|
default: |
|
netdev_err(bond->dev, "bond_do_fail_over_mac impossible: bad policy %d\n", |
|
bond->params.fail_over_mac); |
|
break; |
|
} |
|
|
|
} |
|
|
|
static struct slave *bond_choose_primary_or_current(struct bonding *bond) |
|
{ |
|
struct slave *prim = rtnl_dereference(bond->primary_slave); |
|
struct slave *curr = rtnl_dereference(bond->curr_active_slave); |
|
|
|
if (!prim || prim->link != BOND_LINK_UP) { |
|
if (!curr || curr->link != BOND_LINK_UP) |
|
return NULL; |
|
return curr; |
|
} |
|
|
|
if (bond->force_primary) { |
|
bond->force_primary = false; |
|
return prim; |
|
} |
|
|
|
if (!curr || curr->link != BOND_LINK_UP) |
|
return prim; |
|
|
|
/* At this point, prim and curr are both up */ |
|
switch (bond->params.primary_reselect) { |
|
case BOND_PRI_RESELECT_ALWAYS: |
|
return prim; |
|
case BOND_PRI_RESELECT_BETTER: |
|
if (prim->speed < curr->speed) |
|
return curr; |
|
if (prim->speed == curr->speed && prim->duplex <= curr->duplex) |
|
return curr; |
|
return prim; |
|
case BOND_PRI_RESELECT_FAILURE: |
|
return curr; |
|
default: |
|
netdev_err(bond->dev, "impossible primary_reselect %d\n", |
|
bond->params.primary_reselect); |
|
return curr; |
|
} |
|
} |
|
|
|
/** |
|
* bond_find_best_slave - select the best available slave to be the active one |
|
* @bond: our bonding struct |
|
*/ |
|
static struct slave *bond_find_best_slave(struct bonding *bond) |
|
{ |
|
struct slave *slave, *bestslave = NULL; |
|
struct list_head *iter; |
|
int mintime = bond->params.updelay; |
|
|
|
slave = bond_choose_primary_or_current(bond); |
|
if (slave) |
|
return slave; |
|
|
|
bond_for_each_slave(bond, slave, iter) { |
|
if (slave->link == BOND_LINK_UP) |
|
return slave; |
|
if (slave->link == BOND_LINK_BACK && bond_slave_is_up(slave) && |
|
slave->delay < mintime) { |
|
mintime = slave->delay; |
|
bestslave = slave; |
|
} |
|
} |
|
|
|
return bestslave; |
|
} |
|
|
|
static bool bond_should_notify_peers(struct bonding *bond) |
|
{ |
|
struct slave *slave; |
|
|
|
rcu_read_lock(); |
|
slave = rcu_dereference(bond->curr_active_slave); |
|
rcu_read_unlock(); |
|
|
|
netdev_dbg(bond->dev, "bond_should_notify_peers: slave %s\n", |
|
slave ? slave->dev->name : "NULL"); |
|
|
|
if (!slave || !bond->send_peer_notif || |
|
bond->send_peer_notif % |
|
max(1, bond->params.peer_notif_delay) != 0 || |
|
!netif_carrier_ok(bond->dev) || |
|
test_bit(__LINK_STATE_LINKWATCH_PENDING, &slave->dev->state)) |
|
return false; |
|
|
|
return true; |
|
} |
|
|
|
/** |
|
* change_active_interface - change the active slave into the specified one |
|
* @bond: our bonding struct |
|
* @new_active: the new slave to make the active one |
|
* |
|
* Set the new slave to the bond's settings and unset them on the old |
|
* curr_active_slave. |
|
* Setting include flags, mc-list, promiscuity, allmulti, etc. |
|
* |
|
* If @new's link state is %BOND_LINK_BACK we'll set it to %BOND_LINK_UP, |
|
* because it is apparently the best available slave we have, even though its |
|
* updelay hasn't timed out yet. |
|
* |
|
* Caller must hold RTNL. |
|
*/ |
|
void bond_change_active_slave(struct bonding *bond, struct slave *new_active) |
|
{ |
|
struct slave *old_active; |
|
|
|
ASSERT_RTNL(); |
|
|
|
old_active = rtnl_dereference(bond->curr_active_slave); |
|
|
|
if (old_active == new_active) |
|
return; |
|
|
|
#ifdef CONFIG_XFRM_OFFLOAD |
|
bond_ipsec_del_sa_all(bond); |
|
#endif /* CONFIG_XFRM_OFFLOAD */ |
|
|
|
if (new_active) { |
|
new_active->last_link_up = jiffies; |
|
|
|
if (new_active->link == BOND_LINK_BACK) { |
|
if (bond_uses_primary(bond)) { |
|
slave_info(bond->dev, new_active->dev, "making interface the new active one %d ms earlier\n", |
|
(bond->params.updelay - new_active->delay) * bond->params.miimon); |
|
} |
|
|
|
new_active->delay = 0; |
|
bond_set_slave_link_state(new_active, BOND_LINK_UP, |
|
BOND_SLAVE_NOTIFY_NOW); |
|
|
|
if (BOND_MODE(bond) == BOND_MODE_8023AD) |
|
bond_3ad_handle_link_change(new_active, BOND_LINK_UP); |
|
|
|
if (bond_is_lb(bond)) |
|
bond_alb_handle_link_change(bond, new_active, BOND_LINK_UP); |
|
} else { |
|
if (bond_uses_primary(bond)) { |
|
slave_info(bond->dev, new_active->dev, "making interface the new active one\n"); |
|
} |
|
} |
|
} |
|
|
|
if (bond_uses_primary(bond)) |
|
bond_hw_addr_swap(bond, new_active, old_active); |
|
|
|
if (bond_is_lb(bond)) { |
|
bond_alb_handle_active_change(bond, new_active); |
|
if (old_active) |
|
bond_set_slave_inactive_flags(old_active, |
|
BOND_SLAVE_NOTIFY_NOW); |
|
if (new_active) |
|
bond_set_slave_active_flags(new_active, |
|
BOND_SLAVE_NOTIFY_NOW); |
|
} else { |
|
rcu_assign_pointer(bond->curr_active_slave, new_active); |
|
} |
|
|
|
if (BOND_MODE(bond) == BOND_MODE_ACTIVEBACKUP) { |
|
if (old_active) |
|
bond_set_slave_inactive_flags(old_active, |
|
BOND_SLAVE_NOTIFY_NOW); |
|
|
|
if (new_active) { |
|
bool should_notify_peers = false; |
|
|
|
bond_set_slave_active_flags(new_active, |
|
BOND_SLAVE_NOTIFY_NOW); |
|
|
|
if (bond->params.fail_over_mac) |
|
bond_do_fail_over_mac(bond, new_active, |
|
old_active); |
|
|
|
if (netif_running(bond->dev)) { |
|
bond->send_peer_notif = |
|
bond->params.num_peer_notif * |
|
max(1, bond->params.peer_notif_delay); |
|
should_notify_peers = |
|
bond_should_notify_peers(bond); |
|
} |
|
|
|
call_netdevice_notifiers(NETDEV_BONDING_FAILOVER, bond->dev); |
|
if (should_notify_peers) { |
|
bond->send_peer_notif--; |
|
call_netdevice_notifiers(NETDEV_NOTIFY_PEERS, |
|
bond->dev); |
|
} |
|
} |
|
} |
|
|
|
#ifdef CONFIG_XFRM_OFFLOAD |
|
bond_ipsec_add_sa_all(bond); |
|
#endif /* CONFIG_XFRM_OFFLOAD */ |
|
|
|
/* 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 |
|
*/ |
|
if (netif_running(bond->dev) && (bond->params.resend_igmp > 0) && |
|
((bond_uses_primary(bond) && new_active) || |
|
BOND_MODE(bond) == BOND_MODE_ROUNDROBIN)) { |
|
bond->igmp_retrans = bond->params.resend_igmp; |
|
queue_delayed_work(bond->wq, &bond->mcast_work, 1); |
|
} |
|
} |
|
|
|
/** |
|
* bond_select_active_slave - select a new active slave, if needed |
|
* @bond: our bonding struct |
|
* |
|
* This functions should be called when one of the following occurs: |
|
* - The old curr_active_slave has been released or lost its link. |
|
* - 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 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 != rtnl_dereference(bond->curr_active_slave)) { |
|
bond_change_active_slave(bond, best_slave); |
|
rv = bond_set_carrier(bond); |
|
if (!rv) |
|
return; |
|
|
|
if (netif_carrier_ok(bond->dev)) |
|
netdev_info(bond->dev, "active interface up!\n"); |
|
else |
|
netdev_info(bond->dev, "now running without any active interface!\n"); |
|
} |
|
} |
|
|
|
#ifdef CONFIG_NET_POLL_CONTROLLER |
|
static inline int slave_enable_netpoll(struct slave *slave) |
|
{ |
|
struct netpoll *np; |
|
int err = 0; |
|
|
|
np = kzalloc(sizeof(*np), GFP_KERNEL); |
|
err = -ENOMEM; |
|
if (!np) |
|
goto out; |
|
|
|
err = __netpoll_setup(np, slave->dev); |
|
if (err) { |
|
kfree(np); |
|
goto out; |
|
} |
|
slave->np = np; |
|
out: |
|
return err; |
|
} |
|
static inline void slave_disable_netpoll(struct slave *slave) |
|
{ |
|
struct netpoll *np = slave->np; |
|
|
|
if (!np) |
|
return; |
|
|
|
slave->np = NULL; |
|
|
|
__netpoll_free(np); |
|
} |
|
|
|
static void bond_poll_controller(struct net_device *bond_dev) |
|
{ |
|
struct bonding *bond = netdev_priv(bond_dev); |
|
struct slave *slave = NULL; |
|
struct list_head *iter; |
|
struct ad_info ad_info; |
|
|
|
if (BOND_MODE(bond) == BOND_MODE_8023AD) |
|
if (bond_3ad_get_active_agg_info(bond, &ad_info)) |
|
return; |
|
|
|
bond_for_each_slave_rcu(bond, slave, iter) { |
|
if (!bond_slave_is_up(slave)) |
|
continue; |
|
|
|
if (BOND_MODE(bond) == BOND_MODE_8023AD) { |
|
struct aggregator *agg = |
|
SLAVE_AD_INFO(slave)->port.aggregator; |
|
|
|
if (agg && |
|
agg->aggregator_identifier != ad_info.aggregator_id) |
|
continue; |
|
} |
|
|
|
netpoll_poll_dev(slave->dev); |
|
} |
|
} |
|
|
|
static void bond_netpoll_cleanup(struct net_device *bond_dev) |
|
{ |
|
struct bonding *bond = netdev_priv(bond_dev); |
|
struct list_head *iter; |
|
struct slave *slave; |
|
|
|
bond_for_each_slave(bond, slave, iter) |
|
if (bond_slave_is_up(slave)) |
|
slave_disable_netpoll(slave); |
|
} |
|
|
|
static int bond_netpoll_setup(struct net_device *dev, struct netpoll_info *ni) |
|
{ |
|
struct bonding *bond = netdev_priv(dev); |
|
struct list_head *iter; |
|
struct slave *slave; |
|
int err = 0; |
|
|
|
bond_for_each_slave(bond, slave, iter) { |
|
err = slave_enable_netpoll(slave); |
|
if (err) { |
|
bond_netpoll_cleanup(dev); |
|
break; |
|
} |
|
} |
|
return err; |
|
} |
|
#else |
|
static inline int slave_enable_netpoll(struct slave *slave) |
|
{ |
|
return 0; |
|
} |
|
static inline void slave_disable_netpoll(struct slave *slave) |
|
{ |
|
} |
|
static void bond_netpoll_cleanup(struct net_device *bond_dev) |
|
{ |
|
} |
|
#endif |
|
|
|
/*---------------------------------- IOCTL ----------------------------------*/ |
|
|
|
static netdev_features_t bond_fix_features(struct net_device *dev, |
|
netdev_features_t features) |
|
{ |
|
struct bonding *bond = netdev_priv(dev); |
|
struct list_head *iter; |
|
netdev_features_t mask; |
|
struct slave *slave; |
|
|
|
mask = features; |
|
|
|
features &= ~NETIF_F_ONE_FOR_ALL; |
|
features |= NETIF_F_ALL_FOR_ALL; |
|
|
|
bond_for_each_slave(bond, slave, iter) { |
|
features = netdev_increment_features(features, |
|
slave->dev->features, |
|
mask); |
|
} |
|
features = netdev_add_tso_features(features, mask); |
|
|
|
return features; |
|
} |
|
|
|
#define BOND_VLAN_FEATURES (NETIF_F_HW_CSUM | NETIF_F_SG | \ |
|
NETIF_F_FRAGLIST | NETIF_F_ALL_TSO | \ |
|
NETIF_F_HIGHDMA | NETIF_F_LRO) |
|
|
|
#define BOND_ENC_FEATURES (NETIF_F_HW_CSUM | NETIF_F_SG | \ |
|
NETIF_F_RXCSUM | NETIF_F_ALL_TSO) |
|
|
|
#define BOND_MPLS_FEATURES (NETIF_F_HW_CSUM | NETIF_F_SG | \ |
|
NETIF_F_ALL_TSO) |
|
|
|
|
|
static void bond_compute_features(struct bonding *bond) |
|
{ |
|
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; |
|
#ifdef CONFIG_XFRM_OFFLOAD |
|
netdev_features_t xfrm_features = BOND_XFRM_FEATURES; |
|
#endif /* CONFIG_XFRM_OFFLOAD */ |
|
netdev_features_t mpls_features = BOND_MPLS_FEATURES; |
|
struct net_device *bond_dev = bond->dev; |
|
struct list_head *iter; |
|
struct slave *slave; |
|
unsigned short max_hard_header_len = ETH_HLEN; |
|
unsigned int gso_max_size = GSO_MAX_SIZE; |
|
u16 gso_max_segs = GSO_MAX_SEGS; |
|
|
|
if (!bond_has_slaves(bond)) |
|
goto done; |
|
vlan_features &= NETIF_F_ALL_FOR_ALL; |
|
mpls_features &= NETIF_F_ALL_FOR_ALL; |
|
|
|
bond_for_each_slave(bond, slave, iter) { |
|
vlan_features = netdev_increment_features(vlan_features, |
|
slave->dev->vlan_features, BOND_VLAN_FEATURES); |
|
|
|
enc_features = netdev_increment_features(enc_features, |
|
slave->dev->hw_enc_features, |
|
BOND_ENC_FEATURES); |
|
|
|
#ifdef CONFIG_XFRM_OFFLOAD |
|
xfrm_features = netdev_increment_features(xfrm_features, |
|
slave->dev->hw_enc_features, |
|
BOND_XFRM_FEATURES); |
|
#endif /* CONFIG_XFRM_OFFLOAD */ |
|
|
|
mpls_features = netdev_increment_features(mpls_features, |
|
slave->dev->mpls_features, |
|
BOND_MPLS_FEATURES); |
|
|
|
dst_release_flag &= slave->dev->priv_flags; |
|
if (slave->dev->hard_header_len > max_hard_header_len) |
|
max_hard_header_len = slave->dev->hard_header_len; |
|
|
|
gso_max_size = min(gso_max_size, slave->dev->gso_max_size); |
|
gso_max_segs = min(gso_max_segs, slave->dev->gso_max_segs); |
|
} |
|
bond_dev->hard_header_len = max_hard_header_len; |
|
|
|
done: |
|
bond_dev->vlan_features = vlan_features; |
|
bond_dev->hw_enc_features = enc_features | NETIF_F_GSO_ENCAP_ALL | |
|
NETIF_F_HW_VLAN_CTAG_TX | |
|
NETIF_F_HW_VLAN_STAG_TX | |
|
NETIF_F_GSO_UDP_L4; |
|
#ifdef CONFIG_XFRM_OFFLOAD |
|
bond_dev->hw_enc_features |= xfrm_features; |
|
#endif /* CONFIG_XFRM_OFFLOAD */ |
|
bond_dev->mpls_features = mpls_features; |
|
bond_dev->gso_max_segs = gso_max_segs; |
|
netif_set_gso_max_size(bond_dev, gso_max_size); |
|
|
|
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); |
|
} |
|
|
|
static void bond_setup_by_slave(struct net_device *bond_dev, |
|
struct net_device *slave_dev) |
|
{ |
|
bond_dev->header_ops = slave_dev->header_ops; |
|
|
|
bond_dev->type = slave_dev->type; |
|
bond_dev->hard_header_len = slave_dev->hard_header_len; |
|
bond_dev->needed_headroom = slave_dev->needed_headroom; |
|
bond_dev->addr_len = slave_dev->addr_len; |
|
|
|
memcpy(bond_dev->broadcast, slave_dev->broadcast, |
|
slave_dev->addr_len); |
|
} |
|
|
|
/* On bonding slaves other than the currently active slave, suppress |
|
* duplicates except for alb non-mcast/bcast. |
|
*/ |
|
static bool bond_should_deliver_exact_match(struct sk_buff *skb, |
|
struct slave *slave, |
|
struct bonding *bond) |
|
{ |
|
if (bond_is_slave_inactive(slave)) { |
|
if (BOND_MODE(bond) == BOND_MODE_ALB && |
|
skb->pkt_type != PACKET_BROADCAST && |
|
skb->pkt_type != PACKET_MULTICAST) |
|
return false; |
|
return true; |
|
} |
|
return false; |
|
} |
|
|
|
static rx_handler_result_t bond_handle_frame(struct sk_buff **pskb) |
|
{ |
|
struct sk_buff *skb = *pskb; |
|
struct slave *slave; |
|
struct bonding *bond; |
|
int (*recv_probe)(const struct sk_buff *, struct bonding *, |
|
struct slave *); |
|
int ret = RX_HANDLER_ANOTHER; |
|
|
|
skb = skb_share_check(skb, GFP_ATOMIC); |
|
if (unlikely(!skb)) |
|
return RX_HANDLER_CONSUMED; |
|
|
|
*pskb = skb; |
|
|
|
slave = bond_slave_get_rcu(skb->dev); |
|
bond = slave->bond; |
|
|
|
recv_probe = READ_ONCE(bond->recv_probe); |
|
if (recv_probe) { |
|
ret = recv_probe(skb, bond, slave); |
|
if (ret == RX_HANDLER_CONSUMED) { |
|
consume_skb(skb); |
|
return ret; |
|
} |
|
} |
|
|
|
/* |
|
* For packets determined by bond_should_deliver_exact_match() call to |
|
* be suppressed we want to make an exception for link-local packets. |
|
* This is necessary for e.g. LLDP daemons to be able to monitor |
|
* inactive slave links without being forced to bind to them |
|
* explicitly. |
|
* |
|
* At the same time, packets that are passed to the bonding master |
|
* (including link-local ones) can have their originating interface |
|
* determined via PACKET_ORIGDEV socket option. |
|
*/ |
|
if (bond_should_deliver_exact_match(skb, slave, bond)) { |
|
if (is_link_local_ether_addr(eth_hdr(skb)->h_dest)) |
|
return RX_HANDLER_PASS; |
|
return RX_HANDLER_EXACT; |
|
} |
|
|
|
skb->dev = bond->dev; |
|
|
|
if (BOND_MODE(bond) == BOND_MODE_ALB && |
|
netif_is_bridge_port(bond->dev) && |
|
skb->pkt_type == PACKET_HOST) { |
|
|
|
if (unlikely(skb_cow_head(skb, |
|
skb->data - skb_mac_header(skb)))) { |
|
kfree_skb(skb); |
|
return RX_HANDLER_CONSUMED; |
|
} |
|
bond_hw_addr_copy(eth_hdr(skb)->h_dest, bond->dev->dev_addr, |
|
bond->dev->addr_len); |
|
} |
|
|
|
return ret; |
|
} |
|
|
|
static enum netdev_lag_tx_type bond_lag_tx_type(struct bonding *bond) |
|
{ |
|
switch (BOND_MODE(bond)) { |
|
case BOND_MODE_ROUNDROBIN: |
|
return NETDEV_LAG_TX_TYPE_ROUNDROBIN; |
|
case BOND_MODE_ACTIVEBACKUP: |
|
return NETDEV_LAG_TX_TYPE_ACTIVEBACKUP; |
|
case BOND_MODE_BROADCAST: |
|
return NETDEV_LAG_TX_TYPE_BROADCAST; |
|
case BOND_MODE_XOR: |
|
case BOND_MODE_8023AD: |
|
return NETDEV_LAG_TX_TYPE_HASH; |
|
default: |
|
return NETDEV_LAG_TX_TYPE_UNKNOWN; |
|
} |
|
} |
|
|
|
static enum netdev_lag_hash bond_lag_hash_type(struct bonding *bond, |
|
enum netdev_lag_tx_type type) |
|
{ |
|
if (type != NETDEV_LAG_TX_TYPE_HASH) |
|
return NETDEV_LAG_HASH_NONE; |
|
|
|
switch (bond->params.xmit_policy) { |
|
case BOND_XMIT_POLICY_LAYER2: |
|
return NETDEV_LAG_HASH_L2; |
|
case BOND_XMIT_POLICY_LAYER34: |
|
return NETDEV_LAG_HASH_L34; |
|
case BOND_XMIT_POLICY_LAYER23: |
|
return NETDEV_LAG_HASH_L23; |
|
case BOND_XMIT_POLICY_ENCAP23: |
|
return NETDEV_LAG_HASH_E23; |
|
case BOND_XMIT_POLICY_ENCAP34: |
|
return NETDEV_LAG_HASH_E34; |
|
default: |
|
return NETDEV_LAG_HASH_UNKNOWN; |
|
} |
|
} |
|
|
|
static int bond_master_upper_dev_link(struct bonding *bond, struct slave *slave, |
|
struct netlink_ext_ack *extack) |
|
{ |
|
struct netdev_lag_upper_info lag_upper_info; |
|
enum netdev_lag_tx_type type; |
|
|
|
type = bond_lag_tx_type(bond); |
|
lag_upper_info.tx_type = type; |
|
lag_upper_info.hash_type = bond_lag_hash_type(bond, type); |
|
|
|
return netdev_master_upper_dev_link(slave->dev, bond->dev, slave, |
|
&lag_upper_info, extack); |
|
} |
|
|
|
static void bond_upper_dev_unlink(struct bonding *bond, struct slave *slave) |
|
{ |
|
netdev_upper_dev_unlink(slave->dev, bond->dev); |
|
slave->dev->flags &= ~IFF_SLAVE; |
|
} |
|
|
|
static void slave_kobj_release(struct kobject *kobj) |
|
{ |
|
struct slave *slave = to_slave(kobj); |
|
struct bonding *bond = bond_get_bond_by_slave(slave); |
|
|
|
cancel_delayed_work_sync(&slave->notify_work); |
|
if (BOND_MODE(bond) == BOND_MODE_8023AD) |
|
kfree(SLAVE_AD_INFO(slave)); |
|
|
|
kfree(slave); |
|
} |
|
|
|
static struct kobj_type slave_ktype = { |
|
.release = slave_kobj_release, |
|
#ifdef CONFIG_SYSFS |
|
.sysfs_ops = &slave_sysfs_ops, |
|
#endif |
|
}; |
|
|
|
static int bond_kobj_init(struct slave *slave) |
|
{ |
|
int err; |
|
|
|
err = kobject_init_and_add(&slave->kobj, &slave_ktype, |
|
&(slave->dev->dev.kobj), "bonding_slave"); |
|
if (err) |
|
kobject_put(&slave->kobj); |
|
|
|
return err; |
|
} |
|
|
|
static struct slave *bond_alloc_slave(struct bonding *bond, |
|
struct net_device *slave_dev) |
|
{ |
|
struct slave *slave = NULL; |
|
|
|
slave = kzalloc(sizeof(*slave), GFP_KERNEL); |
|
if (!slave) |
|
return NULL; |
|
|
|
slave->bond = bond; |
|
slave->dev = slave_dev; |
|
INIT_DELAYED_WORK(&slave->notify_work, bond_netdev_notify_work); |
|
|
|
if (bond_kobj_init(slave)) |
|
return NULL; |
|
|
|
if (BOND_MODE(bond) == BOND_MODE_8023AD) { |
|
SLAVE_AD_INFO(slave) = kzalloc(sizeof(struct ad_slave_info), |
|
GFP_KERNEL); |
|
if (!SLAVE_AD_INFO(slave)) { |
|
kobject_put(&slave->kobj); |
|
return NULL; |
|
} |
|
} |
|
|
|
return slave; |
|
} |
|
|
|
static void bond_fill_ifbond(struct bonding *bond, struct ifbond *info) |
|
{ |
|
info->bond_mode = BOND_MODE(bond); |
|
info->miimon = bond->params.miimon; |
|
info->num_slaves = bond->slave_cnt; |
|
} |
|
|
|
static void bond_fill_ifslave(struct slave *slave, struct ifslave *info) |
|
{ |
|
strcpy(info->slave_name, slave->dev->name); |
|
info->link = slave->link; |
|
info->state = bond_slave_state(slave); |
|
info->link_failure_count = slave->link_failure_count; |
|
} |
|
|
|
static void bond_netdev_notify_work(struct work_struct *_work) |
|
{ |
|
struct slave *slave = container_of(_work, struct slave, |
|
notify_work.work); |
|
|
|
if (rtnl_trylock()) { |
|
struct netdev_bonding_info binfo; |
|
|
|
bond_fill_ifslave(slave, &binfo.slave); |
|
bond_fill_ifbond(slave->bond, &binfo.master); |
|
netdev_bonding_info_change(slave->dev, &binfo); |
|
rtnl_unlock(); |
|
} else { |
|
queue_delayed_work(slave->bond->wq, &slave->notify_work, 1); |
|
} |
|
} |
|
|
|
void bond_queue_slave_event(struct slave *slave) |
|
{ |
|
queue_delayed_work(slave->bond->wq, &slave->notify_work, 0); |
|
} |
|
|
|
void bond_lower_state_changed(struct slave *slave) |
|
{ |
|
struct netdev_lag_lower_state_info info; |
|
|
|
info.link_up = slave->link == BOND_LINK_UP || |
|
slave->link == BOND_LINK_FAIL; |
|
info.tx_enabled = bond_is_active_slave(slave); |
|
netdev_lower_state_changed(slave->dev, &info); |
|
} |
|
|
|
/* enslave device <slave> to bond device <master> */ |
|
int bond_enslave(struct net_device *bond_dev, struct net_device *slave_dev, |
|
struct netlink_ext_ack *extack) |
|
{ |
|
struct bonding *bond = netdev_priv(bond_dev); |
|
const struct net_device_ops *slave_ops = slave_dev->netdev_ops; |
|
struct slave *new_slave = NULL, *prev_slave; |
|
struct sockaddr_storage ss; |
|
int link_reporting; |
|
int res = 0, i; |
|
|
|
if (!bond->params.use_carrier && |
|
slave_dev->ethtool_ops->get_link == NULL && |
|
slave_ops->ndo_do_ioctl == NULL) { |
|
slave_warn(bond_dev, slave_dev, "no link monitoring support\n"); |
|
} |
|
|
|
/* already in-use? */ |
|
if (netdev_is_rx_handler_busy(slave_dev)) { |
|
NL_SET_ERR_MSG(extack, "Device is in use and cannot be enslaved"); |
|
slave_err(bond_dev, slave_dev, |
|
"Error: Device is in use and cannot be enslaved\n"); |
|
return -EBUSY; |
|
} |
|
|
|
if (bond_dev == slave_dev) { |
|
NL_SET_ERR_MSG(extack, "Cannot enslave bond to itself."); |
|
netdev_err(bond_dev, "cannot enslave bond to itself.\n"); |
|
return -EPERM; |
|
} |
|
|
|
/* vlan challenged mutual exclusion */ |
|
/* no need to lock since we're protected by rtnl_lock */ |
|
if (slave_dev->features & NETIF_F_VLAN_CHALLENGED) { |
|
slave_dbg(bond_dev, slave_dev, "is NETIF_F_VLAN_CHALLENGED\n"); |
|
if (vlan_uses_dev(bond_dev)) { |
|
NL_SET_ERR_MSG(extack, "Can not enslave VLAN challenged device to VLAN enabled bond"); |
|
slave_err(bond_dev, slave_dev, "Error: cannot enslave VLAN challenged slave on VLAN enabled bond\n"); |
|
return -EPERM; |
|
} else { |
|
slave_warn(bond_dev, slave_dev, "enslaved VLAN challenged slave. Adding VLANs will be blocked as long as it is part of bond.\n"); |
|
} |
|
} else { |
|
slave_dbg(bond_dev, slave_dev, "is !NETIF_F_VLAN_CHALLENGED\n"); |
|
} |
|
|
|
if (slave_dev->features & NETIF_F_HW_ESP) |
|
slave_dbg(bond_dev, slave_dev, "is esp-hw-offload capable\n"); |
|
|
|
/* 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. |
|
*/ |
|
if (slave_dev->flags & IFF_UP) { |
|
NL_SET_ERR_MSG(extack, "Device can not be enslaved while up"); |
|
slave_err(bond_dev, slave_dev, "slave is up - this may be due to an out of date ifenslave\n"); |
|
return -EPERM; |
|
} |
|
|
|
/* set bonding device ether type by slave - bonding netdevices are |
|
* created with ether_setup, so when the slave type is not ARPHRD_ETHER |
|
* there is a need to override some of the type dependent attribs/funcs. |
|
* |
|
* bond ether type mutual exclusion - don't allow slaves of dissimilar |
|
* ether type (eg ARPHRD_ETHER and ARPHRD_INFINIBAND) share the same bond |
|
*/ |
|
if (!bond_has_slaves(bond)) { |
|
if (bond_dev->type != slave_dev->type) { |
|
slave_dbg(bond_dev, slave_dev, "change device type from %d to %d\n", |
|
bond_dev->type, slave_dev->type); |
|
|
|
res = call_netdevice_notifiers(NETDEV_PRE_TYPE_CHANGE, |
|
bond_dev); |
|
res = notifier_to_errno(res); |
|
if (res) { |
|
slave_err(bond_dev, slave_dev, "refused to change device type\n"); |
|
return -EBUSY; |
|
} |
|
|
|
/* Flush unicast and multicast addresses */ |
|
dev_uc_flush(bond_dev); |
|
dev_mc_flush(bond_dev); |
|
|
|
if (slave_dev->type != ARPHRD_ETHER) |
|
bond_setup_by_slave(bond_dev, slave_dev); |
|
else { |
|
ether_setup(bond_dev); |
|
bond_dev->priv_flags &= ~IFF_TX_SKB_SHARING; |
|
} |
|
|
|
call_netdevice_notifiers(NETDEV_POST_TYPE_CHANGE, |
|
bond_dev); |
|
} |
|
} else if (bond_dev->type != slave_dev->type) { |
|
NL_SET_ERR_MSG(extack, "Device type is different from other slaves"); |
|
slave_err(bond_dev, slave_dev, "ether type (%d) is different from other slaves (%d), can not enslave it\n", |
|
slave_dev->type, bond_dev->type); |
|
return -EINVAL; |
|
} |
|
|
|
if (slave_dev->type == ARPHRD_INFINIBAND && |
|
BOND_MODE(bond) != BOND_MODE_ACTIVEBACKUP) { |
|
NL_SET_ERR_MSG(extack, "Only active-backup mode is supported for infiniband slaves"); |
|
slave_warn(bond_dev, slave_dev, "Type (%d) supports only active-backup mode\n", |
|
slave_dev->type); |
|
res = -EOPNOTSUPP; |
|
goto err_undo_flags; |
|
} |
|
|
|
if (!slave_ops->ndo_set_mac_address || |
|
slave_dev->type == ARPHRD_INFINIBAND) { |
|
slave_warn(bond_dev, slave_dev, "The slave device specified does not support setting the MAC address\n"); |
|
if (BOND_MODE(bond) == BOND_MODE_ACTIVEBACKUP && |
|
bond->params.fail_over_mac != BOND_FOM_ACTIVE) { |
|
if (!bond_has_slaves(bond)) { |
|
bond->params.fail_over_mac = BOND_FOM_ACTIVE; |
|
slave_warn(bond_dev, slave_dev, "Setting fail_over_mac to active for active-backup mode\n"); |
|
} else { |
|
NL_SET_ERR_MSG(extack, "Slave device does not support setting the MAC address, but fail_over_mac is not set to active"); |
|
slave_err(bond_dev, slave_dev, "The slave device specified does not support setting the MAC address, but fail_over_mac is not set to active\n"); |
|
res = -EOPNOTSUPP; |
|
goto err_undo_flags; |
|
} |
|
} |
|
} |
|
|
|
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. |
|
*/ |
|
if (!bond_has_slaves(bond) && |
|
bond->dev->addr_assign_type == NET_ADDR_RANDOM) { |
|
res = bond_set_dev_addr(bond->dev, slave_dev); |
|
if (res) |
|
goto err_undo_flags; |
|
} |
|
|
|
new_slave = bond_alloc_slave(bond, slave_dev); |
|
if (!new_slave) { |
|
res = -ENOMEM; |
|
goto err_undo_flags; |
|
} |
|
|
|
/* 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; |
|
|
|
/* Save slave's original mtu and then set it to match the bond */ |
|
new_slave->original_mtu = slave_dev->mtu; |
|
res = dev_set_mtu(slave_dev, bond->dev->mtu); |
|
if (res) { |
|
slave_err(bond_dev, slave_dev, "Error %d calling dev_set_mtu\n", res); |
|
goto err_free; |
|
} |
|
|
|
/* 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 |
|
*/ |
|
bond_hw_addr_copy(new_slave->perm_hwaddr, slave_dev->dev_addr, |
|
slave_dev->addr_len); |
|
|
|
if (!bond->params.fail_over_mac || |
|
BOND_MODE(bond) != BOND_MODE_ACTIVEBACKUP) { |
|
/* Set slave to master's mac address. The application already |
|
* set the master's mac address to that of the first slave |
|
*/ |
|
memcpy(ss.__data, bond_dev->dev_addr, bond_dev->addr_len); |
|
ss.ss_family = slave_dev->type; |
|
res = dev_set_mac_address(slave_dev, (struct sockaddr *)&ss, |
|
extack); |
|
if (res) { |
|
slave_err(bond_dev, slave_dev, "Error %d calling set_mac_address\n", res); |
|
goto err_restore_mtu; |
|
} |
|
} |
|
|
|
/* set slave flag before open to prevent IPv6 addrconf */ |
|
slave_dev->flags |= IFF_SLAVE; |
|
|
|
/* open the slave since the application closed it */ |
|
res = dev_open(slave_dev, extack); |
|
if (res) { |
|
slave_err(bond_dev, slave_dev, "Opening slave failed\n"); |
|
goto err_restore_mac; |
|
} |
|
|
|
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 |
|
* it might fail and we do not want to have to undo everything |
|
*/ |
|
res = bond_alb_init_slave(bond, new_slave); |
|
if (res) |
|
goto err_close; |
|
} |
|
|
|
res = vlan_vids_add_by_dev(slave_dev, bond_dev); |
|
if (res) { |
|
slave_err(bond_dev, slave_dev, "Couldn't add bond vlan ids\n"); |
|
goto err_close; |
|
} |
|
|
|
prev_slave = bond_last_slave(bond); |
|
|
|
new_slave->delay = 0; |
|
new_slave->link_failure_count = 0; |
|
|
|
if (bond_update_speed_duplex(new_slave) && |
|
bond_needs_speed_duplex(bond)) |
|
new_slave->link = BOND_LINK_DOWN; |
|
|
|
new_slave->last_rx = jiffies - |
|
(msecs_to_jiffies(bond->params.arp_interval) + 1); |
|
for (i = 0; i < BOND_MAX_ARP_TARGETS; i++) |
|
new_slave->target_last_arp_rx[i] = new_slave->last_rx; |
|
|
|
if (bond->params.miimon && !bond->params.use_carrier) { |
|
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 |
|
* does not support ETHTOOL/MII and |
|
* arp_interval is not set. Note: if |
|
* use_carrier is enabled, we will never go |
|
* here (because netif_carrier is always |
|
* supported); thus, we don't need to change |
|
* the messages for netif_carrier. |
|
*/ |
|
slave_warn(bond_dev, slave_dev, "MII and ETHTOOL support not available for slave, and arp_interval/arp_ip_target module parameters not specified, thus bonding will not detect link failures! see bonding.txt for details\n"); |
|
} else if (link_reporting == -1) { |
|
/* unable get link status using mii/ethtool */ |
|
slave_warn(bond_dev, slave_dev, "can't get link status from slave; the network driver associated with this interface does not support MII or ETHTOOL link status reporting, thus miimon has no effect on this interface\n"); |
|
} |
|
} |
|
|
|
/* check for initial state */ |
|
new_slave->link = BOND_LINK_NOCHANGE; |
|
if (bond->params.miimon) { |
|
if (bond_check_dev_link(bond, slave_dev, 0) == BMSR_LSTATUS) { |
|
if (bond->params.updelay) { |
|
bond_set_slave_link_state(new_slave, |
|
BOND_LINK_BACK, |
|
BOND_SLAVE_NOTIFY_NOW); |
|
new_slave->delay = bond->params.updelay; |
|
} else { |
|
bond_set_slave_link_state(new_slave, |
|
BOND_LINK_UP, |
|
BOND_SLAVE_NOTIFY_NOW); |
|
} |
|
} else { |
|
bond_set_slave_link_state(new_slave, BOND_LINK_DOWN, |
|
BOND_SLAVE_NOTIFY_NOW); |
|
} |
|
} else if (bond->params.arp_interval) { |
|
bond_set_slave_link_state(new_slave, |
|
(netif_carrier_ok(slave_dev) ? |
|
BOND_LINK_UP : BOND_LINK_DOWN), |
|
BOND_SLAVE_NOTIFY_NOW); |
|
} else { |
|
bond_set_slave_link_state(new_slave, BOND_LINK_UP, |
|
BOND_SLAVE_NOTIFY_NOW); |
|
} |
|
|
|
if (new_slave->link != BOND_LINK_DOWN) |
|
new_slave->last_link_up = jiffies; |
|
slave_dbg(bond_dev, slave_dev, "Initial state of slave is BOND_LINK_%s\n", |
|
new_slave->link == BOND_LINK_DOWN ? "DOWN" : |
|
(new_slave->link == BOND_LINK_UP ? "UP" : "BACK")); |
|
|
|
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) { |
|
rcu_assign_pointer(bond->primary_slave, new_slave); |
|
bond->force_primary = true; |
|
} |
|
} |
|
|
|
switch (BOND_MODE(bond)) { |
|
case BOND_MODE_ACTIVEBACKUP: |
|
bond_set_slave_inactive_flags(new_slave, |
|
BOND_SLAVE_NOTIFY_NOW); |
|
break; |
|
case BOND_MODE_8023AD: |
|
/* in 802.3ad mode, the internal mechanism |
|
* will activate the slaves in the selected |
|
* aggregator |
|
*/ |
|
bond_set_slave_inactive_flags(new_slave, BOND_SLAVE_NOTIFY_NOW); |
|
/* if this is the first slave */ |
|
if (!prev_slave) { |
|
SLAVE_AD_INFO(new_slave)->id = 1; |
|
/* Initialize AD with the number of times that the AD timer is called in 1 second |
|
* can be called only after the mac address of the bond is set |
|
*/ |
|
bond_3ad_initialize(bond, 1000/AD_TIMER_INTERVAL); |
|
} else { |
|
SLAVE_AD_INFO(new_slave)->id = |
|
SLAVE_AD_INFO(prev_slave)->id + 1; |
|
} |
|
|
|
bond_3ad_bind_slave(new_slave); |
|
break; |
|
case BOND_MODE_TLB: |
|
case BOND_MODE_ALB: |
|
bond_set_active_slave(new_slave); |
|
bond_set_slave_inactive_flags(new_slave, BOND_SLAVE_NOTIFY_NOW); |
|
break; |
|
default: |
|
slave_dbg(bond_dev, slave_dev, "This slave is always active in trunk mode\n"); |
|
|
|
/* always active in trunk mode */ |
|
bond_set_active_slave(new_slave); |
|
|
|
/* In trunking mode there is little meaning to curr_active_slave |
|
* anyway (it holds no special properties of the bond device), |
|
* so we can change it without calling change_active_interface() |
|
*/ |
|
if (!rcu_access_pointer(bond->curr_active_slave) && |
|
new_slave->link == BOND_LINK_UP) |
|
rcu_assign_pointer(bond->curr_active_slave, new_slave); |
|
|
|
break; |
|
} /* switch(bond_mode) */ |
|
|
|
#ifdef CONFIG_NET_POLL_CONTROLLER |
|
if (bond->dev->npinfo) { |
|
if (slave_enable_netpoll(new_slave)) { |
|
slave_info(bond_dev, slave_dev, "master_dev is using netpoll, but new slave device does not support netpoll\n"); |
|
res = -EBUSY; |
|
goto err_detach; |
|
} |
|
} |
|
#endif |
|
|
|
if (!(bond_dev->features & NETIF_F_LRO)) |
|
dev_disable_lro(slave_dev); |
|
|
|
res = netdev_rx_handler_register(slave_dev, bond_handle_frame, |
|
new_slave); |
|
if (res) { |
|
slave_dbg(bond_dev, slave_dev, "Error %d calling netdev_rx_handler_register\n", res); |
|
goto err_detach; |
|
} |
|
|
|
res = bond_master_upper_dev_link(bond, new_slave, extack); |
|
if (res) { |
|
slave_dbg(bond_dev, slave_dev, "Error %d calling bond_master_upper_dev_link\n", res); |
|
goto err_unregister; |
|
} |
|
|
|
res = bond_sysfs_slave_add(new_slave); |
|
if (res) { |
|
slave_dbg(bond_dev, slave_dev, "Error %d calling bond_sysfs_slave_add\n", res); |
|
goto err_upper_unlink; |
|
} |
|
|
|
/* If the mode uses primary, then the following is handled by |
|
* bond_change_active_slave(). |
|
*/ |
|
if (!bond_uses_primary(bond)) { |
|
/* set promiscuity level to new slave */ |
|
if (bond_dev->flags & IFF_PROMISC) { |
|
res = dev_set_promiscuity(slave_dev, 1); |
|
if (res) |
|
goto err_sysfs_del; |
|
} |
|
|
|
/* set allmulti level to new slave */ |
|
if (bond_dev->flags & IFF_ALLMULTI) { |
|
res = dev_set_allmulti(slave_dev, 1); |
|
if (res) { |
|
if (bond_dev->flags & IFF_PROMISC) |
|
dev_set_promiscuity(slave_dev, -1); |
|
goto err_sysfs_del; |
|
} |
|
} |
|
|
|
netif_addr_lock_bh(bond_dev); |
|
dev_mc_sync_multiple(slave_dev, bond_dev); |
|
dev_uc_sync_multiple(slave_dev, bond_dev); |
|
netif_addr_unlock_bh(bond_dev); |
|
|
|
if (BOND_MODE(bond) == BOND_MODE_8023AD) { |
|
/* add lacpdu mc addr to mc list */ |
|
u8 lacpdu_multicast[ETH_ALEN] = MULTICAST_LACPDU_ADDR; |
|
|
|
dev_mc_add(slave_dev, lacpdu_multicast); |
|
} |
|
} |
|
|
|
bond->slave_cnt++; |
|
bond_compute_features(bond); |
|
bond_set_carrier(bond); |
|
|
|
if (bond_uses_primary(bond)) { |
|
block_netpoll_tx(); |
|
bond_select_active_slave(bond); |
|
unblock_netpoll_tx(); |
|
} |
|
|
|
if (bond_mode_can_use_xmit_hash(bond)) |
|
bond_update_slave_arr(bond, NULL); |
|
|
|
|
|
slave_info(bond_dev, slave_dev, "Enslaving as %s interface with %s link\n", |
|
bond_is_active_slave(new_slave) ? "an active" : "a backup", |
|
new_slave->link != BOND_LINK_DOWN ? "an up" : "a down"); |
|
|
|
/* enslave is successful */ |
|
bond_queue_slave_event(new_slave); |
|
return 0; |
|
|
|
/* Undo stages on error */ |
|
err_sysfs_del: |
|
bond_sysfs_slave_del(new_slave); |
|
|
|
err_upper_unlink: |
|
bond_upper_dev_unlink(bond, new_slave); |
|
|
|
err_unregister: |
|
netdev_rx_handler_unregister(slave_dev); |
|
|
|
err_detach: |
|
vlan_vids_del_by_dev(slave_dev, bond_dev); |
|
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(); |
|
bond_change_active_slave(bond, NULL); |
|
bond_select_active_slave(bond); |
|
unblock_netpoll_tx(); |
|
} |
|
/* either primary_slave or curr_active_slave might've changed */ |
|
synchronize_rcu(); |
|
slave_disable_netpoll(new_slave); |
|
|
|
err_close: |
|
if (!netif_is_bond_master(slave_dev)) |
|
slave_dev->priv_flags &= ~IFF_BONDING; |
|
dev_close(slave_dev); |
|
|
|
err_restore_mac: |
|
slave_dev->flags &= ~IFF_SLAVE; |
|
if (!bond->params.fail_over_mac || |
|
BOND_MODE(bond) != BOND_MODE_ACTIVEBACKUP) { |
|
/* XXX TODO - fom follow mode needs to change master's |
|
* MAC if this slave's MAC is in use by the bond, or at |
|
* least print a warning. |
|
*/ |
|
bond_hw_addr_copy(ss.__data, new_slave->perm_hwaddr, |
|
new_slave->dev->addr_len); |
|
ss.ss_family = slave_dev->type; |
|
dev_set_mac_address(slave_dev, (struct sockaddr *)&ss, NULL); |
|
} |
|
|
|
err_restore_mtu: |
|
dev_set_mtu(slave_dev, new_slave->original_mtu); |
|
|
|
err_free: |
|
kobject_put(&new_slave->kobj); |
|
|
|
err_undo_flags: |
|
/* Enslave of first slave has failed and we need to fix master's mac */ |
|
if (!bond_has_slaves(bond)) { |
|
if (ether_addr_equal_64bits(bond_dev->dev_addr, |
|
slave_dev->dev_addr)) |
|
eth_hw_addr_random(bond_dev); |
|
if (bond_dev->type != ARPHRD_ETHER) { |
|
dev_close(bond_dev); |
|
ether_setup(bond_dev); |
|
bond_dev->flags |= IFF_MASTER; |
|
bond_dev->priv_flags &= ~IFF_TX_SKB_SHARING; |
|
} |
|
} |
|
|
|
return res; |
|
} |
|
|
|
/* 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 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: |
|
* for Active/Backup: |
|
* Active stays on all backups go down |
|
* for Bonded connections: |
|
* The first up interface should be left on and all others downed. |
|
*/ |
|
static int __bond_release_one(struct net_device *bond_dev, |
|
struct net_device *slave_dev, |
|
bool all, bool unregister) |
|
{ |
|
struct bonding *bond = netdev_priv(bond_dev); |
|
struct slave *slave, *oldcurrent; |
|
struct sockaddr_storage ss; |
|
int old_flags = bond_dev->flags; |
|
netdev_features_t old_features = bond_dev->features; |
|
|
|
/* slave is not a slave or master is not master of this slave */ |
|
if (!(slave_dev->flags & IFF_SLAVE) || |
|
!netdev_has_upper_dev(slave_dev, bond_dev)) { |
|
slave_dbg(bond_dev, slave_dev, "cannot release slave\n"); |
|
return -EINVAL; |
|
} |
|
|
|
block_netpoll_tx(); |
|
|
|
slave = bond_get_slave_by_dev(bond, slave_dev); |
|
if (!slave) { |
|
/* not a slave of this bond */ |
|
slave_info(bond_dev, slave_dev, "interface not enslaved\n"); |
|
unblock_netpoll_tx(); |
|
return -EINVAL; |
|
} |
|
|
|
bond_set_slave_inactive_flags(slave, BOND_SLAVE_NOTIFY_NOW); |
|
|
|
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, slave); |
|
/* unregister rx_handler early so bond_handle_frame wouldn't be called |
|
* for this slave anymore. |
|
*/ |
|
netdev_rx_handler_unregister(slave_dev); |
|
|
|
if (BOND_MODE(bond) == BOND_MODE_8023AD) |
|
bond_3ad_unbind_slave(slave); |
|
|
|
if (bond_mode_can_use_xmit_hash(bond)) |
|
bond_update_slave_arr(bond, slave); |
|
|
|
slave_info(bond_dev, slave_dev, "Releasing %s interface\n", |
|
bond_is_active_slave(slave) ? "active" : "backup"); |
|
|
|
oldcurrent = rcu_access_pointer(bond->curr_active_slave); |
|
|
|
RCU_INIT_POINTER(bond->current_arp_slave, NULL); |
|
|
|
if (!all && (!bond->params.fail_over_mac || |
|
BOND_MODE(bond) != BOND_MODE_ACTIVEBACKUP)) { |
|
if (ether_addr_equal_64bits(bond_dev->dev_addr, slave->perm_hwaddr) && |
|
bond_has_slaves(bond)) |
|
slave_warn(bond_dev, slave_dev, "the permanent HWaddr of slave - %pM - is still in use by bond - set the HWaddr of slave to a different address to avoid conflicts\n", |
|
slave->perm_hwaddr); |
|
} |
|
|
|
if (rtnl_dereference(bond->primary_slave) == slave) |
|
RCU_INIT_POINTER(bond->primary_slave, NULL); |
|
|
|
if (oldcurrent == slave) |
|
bond_change_active_slave(bond, NULL); |
|
|
|
if (bond_is_lb(bond)) { |
|
/* Must be called only after the slave has been |
|
* detached from the list and the curr_active_slave |
|
* has been cleared (if our_slave == old_current), |
|
* but before a new active slave is selected. |
|
*/ |
|
bond_alb_deinit_slave(bond, slave); |
|
} |
|
|
|
if (all) { |
|
RCU_INIT_POINTER(bond->curr_active_slave, NULL); |
|
} else if (oldcurrent == slave) { |
|
/* Note that we hold RTNL over this sequence, so there |
|
* is no concern that another slave add/remove event |
|
* will interfere. |
|
*/ |
|
bond_select_active_slave(bond); |
|
} |
|
|
|
if (!bond_has_slaves(bond)) { |
|
bond_set_carrier(bond); |
|
eth_hw_addr_random(bond_dev); |
|
} |
|
|
|
unblock_netpoll_tx(); |
|
synchronize_rcu(); |
|
bond->slave_cnt--; |
|
|
|
if (!bond_has_slaves(bond)) { |
|
call_netdevice_notifiers(NETDEV_CHANGEADDR, bond->dev); |
|
call_netdevice_notifiers(NETDEV_RELEASE, bond->dev); |
|
} |
|
|
|
bond_compute_features(bond); |
|
if (!(bond_dev->features & NETIF_F_VLAN_CHALLENGED) && |
|
(old_features & NETIF_F_VLAN_CHALLENGED)) |
|
slave_info(bond_dev, slave_dev, "last VLAN challenged slave left bond - VLAN blocking is removed\n"); |
|
|
|
vlan_vids_del_by_dev(slave_dev, bond_dev); |
|
|
|
/* If the mode uses primary, then this case was handled above by |
|
* bond_change_active_slave(..., NULL) |
|
*/ |
|
if (!bond_uses_primary(bond)) { |
|
/* unset promiscuity level from slave |
|
* NOTE: The NETDEV_CHANGEADDR call above may change the value |
|
* of the IFF_PROMISC flag in the bond_dev, but we need the |
|
* value of that flag before that change, as that was the value |
|
* when this slave was attached, so we cache at the start of the |
|
* function and use it here. Same goes for ALLMULTI below |
|
*/ |
|
if (old_flags & IFF_PROMISC) |
|
dev_set_promiscuity(slave_dev, -1); |
|
|
|
/* unset allmulti level from slave */ |
|
if (old_flags & IFF_ALLMULTI) |
|
dev_set_allmulti(slave_dev, -1); |
|
|
|
bond_hw_addr_flush(bond_dev, slave_dev); |
|
} |
|
|
|
slave_disable_netpoll(slave); |
|
|
|
/* close slave before restoring its mac address */ |
|
dev_close(slave_dev); |
|
|
|
if (bond->params.fail_over_mac != BOND_FOM_ACTIVE || |
|
BOND_MODE(bond) != BOND_MODE_ACTIVEBACKUP) { |
|
/* restore original ("permanent") mac address */ |
|
bond_hw_addr_copy(ss.__data, slave->perm_hwaddr, |
|
slave->dev->addr_len); |
|
ss.ss_family = slave_dev->type; |
|
dev_set_mac_address(slave_dev, (struct sockaddr *)&ss, NULL); |
|
} |
|
|
|
if (unregister) |
|
__dev_set_mtu(slave_dev, slave->original_mtu); |
|
else |
|
dev_set_mtu(slave_dev, slave->original_mtu); |
|
|
|
if (!netif_is_bond_master(slave_dev)) |
|
slave_dev->priv_flags &= ~IFF_BONDING; |
|
|
|
kobject_put(&slave->kobj); |
|
|
|
return 0; |
|
} |
|
|
|
/* A wrapper used because of ndo_del_link */ |
|
int bond_release(struct net_device *bond_dev, struct net_device *slave_dev) |
|
{ |
|
return __bond_release_one(bond_dev, slave_dev, false, 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. |
|
*/ |
|
static int bond_release_and_destroy(struct net_device *bond_dev, |
|
struct net_device *slave_dev) |
|
{ |
|
struct bonding *bond = netdev_priv(bond_dev); |
|
int ret; |
|
|
|
ret = __bond_release_one(bond_dev, slave_dev, false, true); |
|
if (ret == 0 && !bond_has_slaves(bond) && |
|
bond_dev->reg_state != NETREG_UNREGISTERING) { |
|
bond_dev->priv_flags |= IFF_DISABLE_NETPOLL; |
|
netdev_info(bond_dev, "Destroying bond\n"); |
|
bond_remove_proc_entry(bond); |
|
unregister_netdevice(bond_dev); |
|
} |
|
return ret; |
|
} |
|
|
|
static void bond_info_query(struct net_device *bond_dev, struct ifbond *info) |
|
{ |
|
struct bonding *bond = netdev_priv(bond_dev); |
|
bond_fill_ifbond(bond, info); |
|
} |
|
|
|
static int bond_slave_info_query(struct net_device *bond_dev, struct ifslave *info) |
|
{ |
|
struct bonding *bond = netdev_priv(bond_dev); |
|
struct list_head *iter; |
|
int i = 0, res = -ENODEV; |
|
struct slave *slave; |
|
|
|
bond_for_each_slave(bond, slave, iter) { |
|
if (i++ == (int)info->slave_id) { |
|
res = 0; |
|
bond_fill_ifslave(slave, info); |
|
break; |
|
} |
|
} |
|
|
|
return res; |
|
} |
|
|
|
/*-------------------------------- Monitoring -------------------------------*/ |
|
|
|
/* called with rcu_read_lock() */ |
|
static int bond_miimon_inspect(struct bonding *bond) |
|
{ |
|
int link_state, commit = 0; |
|
struct list_head *iter; |
|
struct slave *slave; |
|
bool ignore_updelay; |
|
|
|
ignore_updelay = !rcu_dereference(bond->curr_active_slave); |
|
|
|
bond_for_each_slave_rcu(bond, slave, iter) { |
|
bond_propose_link_state(slave, BOND_LINK_NOCHANGE); |
|
|
|
link_state = bond_check_dev_link(bond, slave->dev, 0); |
|
|
|
switch (slave->link) { |
|
case BOND_LINK_UP: |
|
if (link_state) |
|
continue; |
|
|
|
bond_propose_link_state(slave, BOND_LINK_FAIL); |
|
commit++; |
|
slave->delay = bond->params.downdelay; |
|
if (slave->delay) { |
|
slave_info(bond->dev, slave->dev, "link status down for %sinterface, disabling it in %d ms\n", |
|
(BOND_MODE(bond) == |
|
BOND_MODE_ACTIVEBACKUP) ? |
|
(bond_is_active_slave(slave) ? |
|
"active " : "backup ") : "", |
|
bond->params.downdelay * bond->params.miimon); |
|
} |
|
fallthrough; |
|
case BOND_LINK_FAIL: |
|
if (link_state) { |
|
/* recovered before downdelay expired */ |
|
bond_propose_link_state(slave, BOND_LINK_UP); |
|
slave->last_link_up = jiffies; |
|
slave_info(bond->dev, slave->dev, "link status up again after %d ms\n", |
|
(bond->params.downdelay - slave->delay) * |
|
bond->params.miimon); |
|
commit++; |
|
continue; |
|
} |
|
|
|
if (slave->delay <= 0) { |
|
bond_propose_link_state(slave, BOND_LINK_DOWN); |
|
commit++; |
|
continue; |
|
} |
|
|
|
slave->delay--; |
|
break; |
|
|
|
case BOND_LINK_DOWN: |
|
if (!link_state) |
|
continue; |
|
|
|
bond_propose_link_state(slave, BOND_LINK_BACK); |
|
commit++; |
|
slave->delay = bond->params.updelay; |
|
|
|
if (slave->delay) { |
|
slave_info(bond->dev, slave->dev, "link status up, enabling it in %d ms\n", |
|
ignore_updelay ? 0 : |
|
bond->params.updelay * |
|
bond->params.miimon); |
|
} |
|
fallthrough; |
|
case BOND_LINK_BACK: |
|
if (!link_state) { |
|
bond_propose_link_state(slave, BOND_LINK_DOWN); |
|
slave_info(bond->dev, slave->dev, "link status down again after %d ms\n", |
|
(bond->params.updelay - slave->delay) * |
|
bond->params.miimon); |
|
commit++; |
|
continue; |
|
} |
|
|
|
if (ignore_updelay) |
|
slave->delay = 0; |
|
|
|
if (slave->delay <= 0) { |
|
bond_propose_link_state(slave, BOND_LINK_UP); |
|
commit++; |
|
ignore_updelay = false; |
|
continue; |
|
} |
|
|
|
slave->delay--; |
|
break; |
|
} |
|
} |
|
|
|
return commit; |
|
} |
|
|
|
static void bond_miimon_link_change(struct bonding *bond, |
|
struct slave *slave, |
|
char link) |
|
{ |
|
switch (BOND_MODE(bond)) { |
|
case BOND_MODE_8023AD: |
|
bond_3ad_handle_link_change(slave, link); |
|
break; |
|
case BOND_MODE_TLB: |
|
case BOND_MODE_ALB: |
|
bond_alb_handle_link_change(bond, slave, link); |
|
break; |
|
case BOND_MODE_XOR: |
|
bond_update_slave_arr(bond, NULL); |
|
break; |
|
} |
|
} |
|
|
|
static void bond_miimon_commit(struct bonding *bond) |
|
{ |
|
struct list_head *iter; |
|
struct slave *slave, *primary; |
|
|
|
bond_for_each_slave(bond, slave, iter) { |
|
switch (slave->link_new_state) { |
|
case BOND_LINK_NOCHANGE: |
|
/* For 802.3ad mode, check current slave speed and |
|
* duplex again in case its port was disabled after |
|
* invalid speed/duplex reporting but recovered before |
|
* link monitoring could make a decision on the actual |
|
* link status |
|
*/ |
|
if (BOND_MODE(bond) == BOND_MODE_8023AD && |
|
slave->link == BOND_LINK_UP) |
|
bond_3ad_adapter_speed_duplex_changed(slave); |
|
continue; |
|
|
|
case BOND_LINK_UP: |
|
if (bond_update_speed_duplex(slave) && |
|
bond_needs_speed_duplex(bond)) { |
|
slave->link = BOND_LINK_DOWN; |
|
if (net_ratelimit()) |
|
slave_warn(bond->dev, slave->dev, |
|
"failed to get link speed/duplex\n"); |
|
continue; |
|
} |
|
bond_set_slave_link_state(slave, BOND_LINK_UP, |
|
BOND_SLAVE_NOTIFY_NOW); |
|
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); |
|
} |
|
|
|
slave_info(bond->dev, slave->dev, "link status definitely up, %u Mbps %s duplex\n", |
|
slave->speed == SPEED_UNKNOWN ? 0 : slave->speed, |
|
slave->duplex ? "full" : "half"); |
|
|
|
bond_miimon_link_change(bond, slave, BOND_LINK_UP); |
|
|
|
if (!bond->curr_active_slave || slave == primary) |
|
goto do_failover; |
|
|
|
continue; |
|
|
|
case BOND_LINK_DOWN: |
|
if (slave->link_failure_count < UINT_MAX) |
|
slave->link_failure_count++; |
|
|
|
bond_set_slave_link_state(slave, BOND_LINK_DOWN, |
|
BOND_SLAVE_NOTIFY_NOW); |
|
|
|
if (BOND_MODE(bond) == BOND_MODE_ACTIVEBACKUP || |
|
BOND_MODE(bond) == BOND_MODE_8023AD) |
|
bond_set_slave_inactive_flags(slave, |
|
BOND_SLAVE_NOTIFY_NOW); |
|
|
|
slave_info(bond->dev, slave->dev, "link status definitely down, disabling slave\n"); |
|
|
|
bond_miimon_link_change(bond, slave, BOND_LINK_DOWN); |
|
|
|
if (slave == rcu_access_pointer(bond->curr_active_slave)) |
|
goto do_failover; |
|
|
|
continue; |
|
|
|
default: |
|
slave_err(bond->dev, slave->dev, "invalid new link %d on slave\n", |
|
slave->link_new_state); |
|
bond_propose_link_state(slave, BOND_LINK_NOCHANGE); |
|
|
|
continue; |
|
} |
|
|
|
do_failover: |
|
block_netpoll_tx(); |
|
bond_select_active_slave(bond); |
|
unblock_netpoll_tx(); |
|
} |
|
|
|
bond_set_carrier(bond); |
|
} |
|
|
|
/* 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) |
|
* an acquisition of appropriate locks followed by a commit phase to |
|
* implement whatever link state changes are indicated. |
|
*/ |
|
static void bond_mii_monitor(struct work_struct *work) |
|
{ |
|
struct bonding *bond = container_of(work, struct bonding, |
|
mii_work.work); |
|
bool should_notify_peers = false; |
|
bool commit; |
|
unsigned long delay; |
|
struct slave *slave; |
|
struct list_head *iter; |
|
|
|
delay = msecs_to_jiffies(bond->params.miimon); |
|
|
|
if (!bond_has_slaves(bond)) |
|
goto re_arm; |
|
|
|
rcu_read_lock(); |
|
should_notify_peers = bond_should_notify_peers(bond); |
|
commit = !!bond_miimon_inspect(bond); |
|
if (bond->send_peer_notif) { |
|
rcu_read_unlock(); |
|
if (rtnl_trylock()) { |
|
bond->send_peer_notif--; |
|
rtnl_unlock(); |
|
} |
|
} else { |
|
rcu_read_unlock(); |
|
} |
|
|
|
if (commit) { |
|
/* Race avoidance with bond_close cancel of workqueue */ |
|
if (!rtnl_trylock()) { |
|
delay = 1; |
|
should_notify_peers = false; |
|
goto re_arm; |
|
} |
|
|
|
bond_for_each_slave(bond, slave, iter) { |
|
bond_commit_link_state(slave, BOND_SLAVE_NOTIFY_LATER); |
|
} |
|
bond_miimon_commit(bond); |
|
|
|
rtnl_unlock(); /* might sleep, hold no other locks */ |
|
} |
|
|
|
re_arm: |
|
if (bond->params.miimon) |
|
queue_delayed_work(bond->wq, &bond->mii_work, delay); |
|
|
|
if (should_notify_peers) { |
|
if (!rtnl_trylock()) |
|
return; |
|
call_netdevice_notifiers(NETDEV_NOTIFY_PEERS, bond->dev); |
|
rtnl_unlock(); |
|
} |
|
} |
|
|
|
static int bond_upper_dev_walk(struct net_device *upper, |
|
struct netdev_nested_priv *priv) |
|
{ |
|
__be32 ip = *(__be32 *)priv->data; |
|
|
|
return ip == bond_confirm_addr(upper, 0, ip); |
|
} |
|
|
|
static bool bond_has_this_ip(struct bonding *bond, __be32 ip) |
|
{ |
|
struct netdev_nested_priv priv = { |
|
.data = (void *)&ip, |
|
}; |
|
bool ret = false; |
|
|
|
if (ip == bond_confirm_addr(bond->dev, 0, ip)) |
|
return true; |
|
|
|
rcu_read_lock(); |
|
if (netdev_walk_all_upper_dev_rcu(bond->dev, bond_upper_dev_walk, &priv)) |
|
ret = true; |
|
rcu_read_unlock(); |
|
|
|
return ret; |
|
} |
|
|
|
/* 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. |
|
*/ |
|
static void bond_arp_send(struct slave *slave, int arp_op, __be32 dest_ip, |
|
__be32 src_ip, struct bond_vlan_tag *tags) |
|
{ |
|
struct sk_buff *skb; |
|
struct bond_vlan_tag *outer_tag = tags; |
|
struct net_device *slave_dev = slave->dev; |
|
struct net_device *bond_dev = slave->bond->dev; |
|
|
|
slave_dbg(bond_dev, slave_dev, "arp %d on slave: dst %pI4 src %pI4\n", |
|
arp_op, &dest_ip, &src_ip); |
|
|
|
skb = arp_create(arp_op, ETH_P_ARP, dest_ip, slave_dev, src_ip, |
|
NULL, slave_dev->dev_addr, NULL); |
|
|
|
if (!skb) { |
|
net_err_ratelimited("ARP packet allocation failed\n"); |
|
return; |
|
} |
|
|
|
if (!tags || tags->vlan_proto == VLAN_N_VID) |
|
goto xmit; |
|
|
|
tags++; |
|
|
|
/* Go through all the tags backwards and add them to the packet */ |
|
while (tags->vlan_proto != VLAN_N_VID) { |
|
if (!tags->vlan_id) { |
|
tags++; |
|
continue; |
|
} |
|
|
|
slave_dbg(bond_dev, slave_dev, "inner tag: proto %X vid %X\n", |
|
ntohs(outer_tag->vlan_proto), tags->vlan_id); |
|
skb = vlan_insert_tag_set_proto(skb, tags->vlan_proto, |
|
tags->vlan_id); |
|
if (!skb) { |
|
net_err_ratelimited("failed to insert inner VLAN tag\n"); |
|
return; |
|
} |
|
|
|
tags++; |
|
} |
|
/* Set the outer tag */ |
|
if (outer_tag->vlan_id) { |
|
slave_dbg(bond_dev, slave_dev, "outer tag: proto %X vid %X\n", |
|
ntohs(outer_tag->vlan_proto), outer_tag->vlan_id); |
|
__vlan_hwaccel_put_tag(skb, outer_tag->vlan_proto, |
|
outer_tag->vlan_id); |
|
} |
|
|
|
xmit: |
|
arp_xmit(skb); |
|
} |
|
|
|
/* Validate the device path between the @start_dev and the @end_dev. |
|
* The path is valid if the @end_dev is reachable through device |
|
* stacking. |
|
* When the path is validated, collect any vlan information in the |
|
* path. |
|
*/ |
|
struct bond_vlan_tag *bond_verify_device_path(struct net_device *start_dev, |
|
struct net_device *end_dev, |
|
int level) |
|
{ |
|
struct bond_vlan_tag *tags; |
|
struct net_device *upper; |
|
struct list_head *iter; |
|
|
|
if (start_dev == end_dev) { |
|
tags = kcalloc(level + 1, sizeof(*tags), GFP_ATOMIC); |
|
if (!tags) |
|
return ERR_PTR(-ENOMEM); |
|
tags[level].vlan_proto = VLAN_N_VID; |
|
return tags; |
|
} |
|
|
|
netdev_for_each_upper_dev_rcu(start_dev, upper, iter) { |
|
tags = bond_verify_device_path(upper, end_dev, level + 1); |
|
if (IS_ERR_OR_NULL(tags)) { |
|
if (IS_ERR(tags)) |
|
return tags; |
|
continue; |
|
} |
|
if (is_vlan_dev(upper)) { |
|
tags[level].vlan_proto = vlan_dev_vlan_proto(upper); |
|
tags[level].vlan_id = vlan_dev_vlan_id(upper); |
|
} |
|
|
|
return tags; |
|
} |
|
|
|
return NULL; |
|
} |
|
|
|
static void bond_arp_send_all(struct bonding *bond, struct slave *slave) |
|
{ |
|
struct rtable *rt; |
|
struct bond_vlan_tag *tags; |
|
__be32 *targets = bond->params.arp_targets, addr; |
|
int i; |
|
|
|
for (i = 0; i < BOND_MAX_ARP_TARGETS && targets[i]; i++) { |
|
slave_dbg(bond->dev, slave->dev, "%s: target %pI4\n", |
|
__func__, &targets[i]); |
|
tags = NULL; |
|
|
|
/* Find out through which dev should the packet go */ |
|
rt = ip_route_output(dev_net(bond->dev), targets[i], 0, |
|
RTO_ONLINK, 0); |
|
if (IS_ERR(rt)) { |
|
/* there's no route to target - try to send arp |
|
* probe to generate any traffic (arp_validate=0) |
|
*/ |
|
if (bond->params.arp_validate) |
|
net_warn_ratelimited("%s: no route to arp_ip_target %pI4 and arp_validate is set\n", |
|
bond->dev->name, |
|
&targets[i]); |
|
bond_arp_send(slave, ARPOP_REQUEST, targets[i], |
|
0, tags); |
|
continue; |
|
} |
|
|
|
/* bond device itself */ |
|
if (rt->dst.dev == bond->dev) |
|
goto found; |
|
|
|
rcu_read_lock(); |
|
tags = bond_verify_device_path(bond->dev, rt->dst.dev, 0); |
|
rcu_read_unlock(); |
|
|
|
if (!IS_ERR_OR_NULL(tags)) |
|
goto found; |
|
|
|
/* Not our device - skip */ |
|
slave_dbg(bond->dev, slave->dev, "no path to arp_ip_target %pI4 via rt.dev %s\n", |
|
&targets[i], rt->dst.dev ? rt->dst.dev->name : "NULL"); |
|
|
|
ip_rt_put(rt); |
|
continue; |
|
|
|
found: |
|
addr = bond_confirm_addr(rt->dst.dev, targets[i], 0); |
|
ip_rt_put(rt); |
|
bond_arp_send(slave, ARPOP_REQUEST, targets[i], addr, tags); |
|
kfree(tags); |
|
} |
|
} |
|
|
|
static void bond_validate_arp(struct bonding *bond, struct slave *slave, __be32 sip, __be32 tip) |
|
{ |
|
int i; |
|
|
|
if (!sip || !bond_has_this_ip(bond, tip)) { |
|
slave_dbg(bond->dev, slave->dev, "%s: sip %pI4 tip %pI4 not found\n", |
|
__func__, &sip, &tip); |
|
return; |
|
} |
|
|
|
i = bond_get_targets_ip(bond->params.arp_targets, sip); |
|
if (i == -1) { |
|
slave_dbg(bond->dev, slave->dev, "%s: sip %pI4 not found in targets\n", |
|
__func__, &sip); |
|
return; |
|
} |
|
slave->last_rx = jiffies; |
|
slave->target_last_arp_rx[i] = jiffies; |
|
} |
|
|
|
int bond_arp_rcv(const struct sk_buff *skb, struct bonding *bond, |
|
struct slave *slave) |
|
{ |
|
struct arphdr *arp = (struct arphdr *)skb->data; |
|
struct slave *curr_active_slave, *curr_arp_slave; |
|
unsigned char *arp_ptr; |
|
__be32 sip, tip; |
|
int is_arp = skb->protocol == __cpu_to_be16(ETH_P_ARP); |
|
unsigned int alen; |
|
|
|
if (!slave_do_arp_validate(bond, slave)) { |
|
if ((slave_do_arp_validate_only(bond) && is_arp) || |
|
!slave_do_arp_validate_only(bond)) |
|
slave->last_rx = jiffies; |
|
return RX_HANDLER_ANOTHER; |
|
} else if (!is_arp) { |
|
return RX_HANDLER_ANOTHER; |
|
} |
|
|
|
alen = arp_hdr_len(bond->dev); |
|
|
|
slave_dbg(bond->dev, slave->dev, "%s: skb->dev %s\n", |
|
__func__, skb->dev->name); |
|
|
|
if (alen > skb_headlen(skb)) { |
|
arp = kmalloc(alen, GFP_ATOMIC); |
|
if (!arp) |
|
goto out_unlock; |
|
if (skb_copy_bits(skb, 0, arp, alen) < 0) |
|
goto out_unlock; |
|
} |
|
|
|
if (arp->ar_hln != bond->dev->addr_len || |
|
skb->pkt_type == PACKET_OTHERHOST || |
|
skb->pkt_type == PACKET_LOOPBACK || |
|
arp->ar_hrd != htons(ARPHRD_ETHER) || |
|
arp->ar_pro != htons(ETH_P_IP) || |
|
arp->ar_pln != 4) |
|
goto out_unlock; |
|
|
|
arp_ptr = (unsigned char *)(arp + 1); |
|
arp_ptr += bond->dev->addr_len; |
|
memcpy(&sip, arp_ptr, 4); |
|
arp_ptr += 4 + bond->dev->addr_len; |
|
memcpy(&tip, arp_ptr, 4); |
|
|
|
slave_dbg(bond->dev, slave->dev, "%s: %s/%d av %d sv %d sip %pI4 tip %pI4\n", |
|
__func__, slave->dev->name, bond_slave_state(slave), |
|
bond->params.arp_validate, slave_do_arp_validate(bond, slave), |
|
&sip, &tip); |
|
|
|
curr_active_slave = rcu_dereference(bond->curr_active_slave); |
|
curr_arp_slave = rcu_dereference(bond->current_arp_slave); |
|
|
|
/* We 'trust' the received ARP enough to validate it if: |
|
* |
|
* (a) the slave receiving the ARP is active (which includes the |
|
* current ARP slave, if any), or |
|
* |
|
* (b) the receiving slave isn't active, but there is a currently |
|
* active slave and it received valid arp reply(s) after it became |
|
* the currently active slave, or |
|
* |
|
* (c) there is an ARP slave that sent an ARP during the prior ARP |
|
* interval, and we receive an ARP reply on any slave. We accept |
|
* these because switch FDB update delays may deliver the ARP |
|
* reply to a slave other than the sender of the ARP request. |
|
* |
|
* Note: for (b), backup slaves are receiving the broadcast ARP |
|
* request, not a reply. This request passes from the sending |
|
* slave through the L2 switch(es) to the receiving slave. Since |
|
* this is checking the request, sip/tip are swapped for |
|
* validation. |
|
* |
|
* This is done to avoid endless looping when we can't reach the |
|
* arp_ip_target and fool ourselves with our own arp requests. |
|
*/ |
|
if (bond_is_active_slave(slave)) |
|
bond_validate_arp(bond, slave, sip, tip); |
|
else if (curr_active_slave && |
|
time_after(slave_last_rx(bond, curr_active_slave), |
|
curr_active_slave->last_link_up)) |
|
bond_validate_arp(bond, slave, tip, sip); |
|
else if (curr_arp_slave && (arp->ar_op == htons(ARPOP_REPLY)) && |
|
bond_time_in_interval(bond, |
|
dev_trans_start(curr_arp_slave->dev), 1)) |
|
bond_validate_arp(bond, slave, sip, tip); |
|
|
|
out_unlock: |
|
if (arp != (struct arphdr *)skb->data) |
|
kfree(arp); |
|
return RX_HANDLER_ANOTHER; |
|
} |
|
|
|
/* function to verify if we're in the arp_interval timeslice, returns true if |
|
* (last_act - arp_interval) <= jiffies <= (last_act + mod * arp_interval + |
|
* arp_interval/2) . the arp_interval/2 is needed for really fast networks. |
|
*/ |
|
static bool bond_time_in_interval(struct bonding *bond, unsigned long last_act, |
|
int mod) |
|
{ |
|
int delta_in_ticks = msecs_to_jiffies(bond->params.arp_interval); |
|
|
|
return time_in_range(jiffies, |
|
last_act - delta_in_ticks, |
|
last_act + mod * delta_in_ticks + delta_in_ticks/2); |
|
} |
|
|
|
/* 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 |
|
* arp monitoring in active backup mode. |
|
*/ |
|
static void bond_loadbalance_arp_mon(struct bonding *bond) |
|
{ |
|
struct slave *slave, *oldcurrent; |
|
struct list_head *iter; |
|
int do_failover = 0, slave_state_changed = 0; |
|
|
|
if (!bond_has_slaves(bond)) |
|
goto re_arm; |
|
|
|
rcu_read_lock(); |
|
|
|
oldcurrent = rcu_dereference(bond->curr_active_slave); |
|
/* see if any of the previous devices are up now (i.e. they have |
|
* xmt and rcv traffic). the curr_active_slave does not come into |
|
* the picture unless it is null. also, slave->last_link_up is not |
|
* needed here because we send an arp on each slave and give a slave |
|
* as long as it needs to get the tx/rx within the delta. |
|
* TODO: what about up/down delay in arp mode? it wasn't here before |
|
* so it can wait |
|
*/ |
|
bond_for_each_slave_rcu(bond, slave, iter) { |
|
unsigned long trans_start = dev_trans_start(slave->dev); |
|
|
|
bond_propose_link_state(slave, BOND_LINK_NOCHANGE); |
|
|
|
if (slave->link != BOND_LINK_UP) { |
|
if (bond_time_in_interval(bond, trans_start, 1) && |
|
bond_time_in_interval(bond, slave->last_rx, 1)) { |
|
|
|
bond_propose_link_state(slave, BOND_LINK_UP); |
|
slave_state_changed = 1; |
|
|
|
/* primary_slave has no meaning in round-robin |
|
* mode. the window of a slave being up and |
|
* curr_active_slave being null after enslaving |
|
* is closed. |
|
*/ |
|
if (!oldcurrent) { |
|
slave_info(bond->dev, slave->dev, "link status definitely up\n"); |
|
do_failover = 1; |
|
} else { |
|
slave_info(bond->dev, slave->dev, "interface is now up\n"); |
|
} |
|
} |
|
} else { |
|
/* slave->link == BOND_LINK_UP */ |
|
|
|
/* not all switches will respond to an arp request |
|
* when the source ip is 0, so don't take the link down |
|
* if we don't know our ip yet |
|
*/ |
|
if (!bond_time_in_interval(bond, trans_start, 2) || |
|
!bond_time_in_interval(bond, slave->last_rx, 2)) { |
|
|
|
bond_propose_link_state(slave, BOND_LINK_DOWN); |
|
slave_state_changed = 1; |
|
|
|
if (slave->link_failure_count < UINT_MAX) |
|
slave->link_failure_count++; |
|
|
|
slave_info(bond->dev, slave->dev, "interface is now down\n"); |
|
|
|
if (slave == oldcurrent) |
|
do_failover = 1; |
|
} |
|
} |
|
|
|
/* note: if switch is in round-robin mode, all links |
|
* must tx arp to ensure all links rx an arp - otherwise |
|
* links may oscillate or not come up at all; if switch is |
|
* in something like xor mode, there is nothing we can |
|
* do - all replies will be rx'ed on same link causing slaves |
|
* to be unstable during low/no traffic periods |
|
*/ |
|
if (bond_slave_is_up(slave)) |
|
bond_arp_send_all(bond, slave); |
|
} |
|
|
|
rcu_read_unlock(); |
|
|
|
if (do_failover || slave_state_changed) { |
|
if (!rtnl_trylock()) |
|
goto re_arm; |
|
|
|
bond_for_each_slave(bond, slave, iter) { |
|
if (slave->link_new_state != BOND_LINK_NOCHANGE) |
|
slave->link = slave->link_new_state; |
|
} |
|
|
|
if (slave_state_changed) { |
|
bond_slave_state_change(bond); |
|
if (BOND_MODE(bond) == BOND_MODE_XOR) |
|
bond_update_slave_arr(bond, NULL); |
|
} |
|
if (do_failover) { |
|
block_netpoll_tx(); |
|
bond_select_active_slave(bond); |
|
unblock_netpoll_tx(); |
|
} |
|
rtnl_unlock(); |
|
} |
|
|
|
re_arm: |
|
if (bond->params.arp_interval) |
|
queue_delayed_work(bond->wq, &bond->arp_work, |
|
msecs_to_jiffies(bond->params.arp_interval)); |
|
} |
|
|
|
/* Called to inspect slaves for active-backup mode ARP monitor link state |
|
* changes. Sets proposed link state 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 held. |
|
*/ |
|
static int bond_ab_arp_inspect(struct bonding *bond) |
|
{ |
|
unsigned long trans_start, last_rx; |
|
struct list_head *iter; |
|
struct slave *slave; |
|
int commit = 0; |
|
|
|
bond_for_each_slave_rcu(bond, slave, iter) { |
|
bond_propose_link_state(slave, BOND_LINK_NOCHANGE); |
|
last_rx = slave_last_rx(bond, slave); |
|
|
|
if (slave->link != BOND_LINK_UP) { |
|
if (bond_time_in_interval(bond, last_rx, 1)) { |
|
bond_propose_link_state(slave, BOND_LINK_UP); |
|
commit++; |
|
} else if (slave->link == BOND_LINK_BACK) { |
|
bond_propose_link_state(slave, BOND_LINK_FAIL); |
|
commit++; |
|
} |
|
continue; |
|
} |
|
|
|
/* 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: |
|
* - No current_arp_slave AND |
|
* - more than 3*delta since last receive AND |
|
* - the bond has an IP address |
|
* |
|
* Note: a non-null current_arp_slave indicates |
|
* the curr_active_slave went down and we are |
|
* searching for a new one; under this condition |
|
* we only take the curr_active_slave down - this |
|
* gives each slave a chance to tx/rx traffic |
|
* before being taken out |
|
*/ |
|
if (!bond_is_active_slave(slave) && |
|
!rcu_access_pointer(bond->current_arp_slave) && |
|
!bond_time_in_interval(bond, last_rx, 3)) { |
|
bond_propose_link_state(slave, BOND_LINK_DOWN); |
|
commit++; |
|
} |
|
|
|
/* 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) |
|
*/ |
|
trans_start = dev_trans_start(slave->dev); |
|
if (bond_is_active_slave(slave) && |
|
(!bond_time_in_interval(bond, trans_start, 2) || |
|
!bond_time_in_interval(bond, last_rx, 2))) { |
|
bond_propose_link_state(slave, BOND_LINK_DOWN); |
|
commit++; |
|
} |
|
} |
|
|
|
return commit; |
|
} |
|
|
|
/* Called to commit link state changes noted by inspection step of |
|
* active-backup mode ARP monitor. |
|
* |
|
* Called with RTNL hold. |
|
*/ |
|
static void bond_ab_arp_commit(struct bonding *bond) |
|
{ |
|
unsigned long trans_start; |
|
struct list_head *iter; |
|
struct slave *slave; |
|
|
|
bond_for_each_slave(bond, slave, iter) { |
|
switch (slave->link_new_state) { |
|
case BOND_LINK_NOCHANGE: |
|
continue; |
|
|
|
case BOND_LINK_UP: |
|
trans_start = dev_trans_start(slave->dev); |
|
if (rtnl_dereference(bond->curr_active_slave) != slave || |
|
(!rtnl_dereference(bond->curr_active_slave) && |
|
bond_time_in_interval(bond, trans_start, 1))) { |
|
struct slave *current_arp_slave; |
|
|
|
current_arp_slave = rtnl_dereference(bond->current_arp_slave); |
|
bond_set_slave_link_state(slave, BOND_LINK_UP, |
|
BOND_SLAVE_NOTIFY_NOW); |
|
if (current_arp_slave) { |
|
bond_set_slave_inactive_flags( |
|
current_arp_slave, |
|
BOND_SLAVE_NOTIFY_NOW); |
|
RCU_INIT_POINTER(bond->current_arp_slave, NULL); |
|
} |
|
|
|
slave_info(bond->dev, slave->dev, "link status definitely up\n"); |
|
|
|
if (!rtnl_dereference(bond->curr_active_slave) || |
|
slave == rtnl_dereference(bond->primary_slave)) |
|
goto do_failover; |
|
|
|
} |
|
|
|
continue; |
|
|
|
case BOND_LINK_DOWN: |
|
if (slave->link_failure_count < UINT_MAX) |
|
slave->link_failure_count++; |
|
|
|
bond_set_slave_link_state(slave, BOND_LINK_DOWN, |
|
BOND_SLAVE_NOTIFY_NOW); |
|
bond_set_slave_inactive_flags(slave, |
|
BOND_SLAVE_NOTIFY_NOW); |
|
|
|
slave_info(bond->dev, slave->dev, "link status definitely down, disabling slave\n"); |
|
|
|
if (slave == rtnl_dereference(bond->curr_active_slave)) { |
|
RCU_INIT_POINTER(bond->current_arp_slave, NULL); |
|
goto do_failover; |
|
} |
|
|
|
continue; |
|
|
|
case BOND_LINK_FAIL: |
|
bond_set_slave_link_state(slave, BOND_LINK_FAIL, |
|
BOND_SLAVE_NOTIFY_NOW); |
|
bond_set_slave_inactive_flags(slave, |
|
BOND_SLAVE_NOTIFY_NOW); |
|
|
|
/* A slave has just been enslaved and has become |
|
* the current active slave. |
|
*/ |
|
if (rtnl_dereference(bond->curr_active_slave)) |
|
RCU_INIT_POINTER(bond->current_arp_slave, NULL); |
|
continue; |
|
|
|
default: |
|
slave_err(bond->dev, slave->dev, |
|
"impossible: link_new_state %d on slave\n", |
|
slave->link_new_state); |
|
continue; |
|
} |
|
|
|
do_failover: |
|
block_netpoll_tx(); |
|
bond_select_active_slave(bond); |
|
unblock_netpoll_tx(); |
|
} |
|
|
|
bond_set_carrier(bond); |
|
} |
|
|
|
/* Send ARP probes for active-backup mode ARP monitor. |
|
* |
|
* Called with rcu_read_lock held. |
|
*/ |
|
static bool bond_ab_arp_probe(struct bonding *bond) |
|
{ |
|
struct slave *slave, *before = NULL, *new_slave = NULL, |
|
*curr_arp_slave = rcu_dereference(bond->current_arp_slave), |
|
*curr_active_slave = rcu_dereference(bond->curr_active_slave); |
|
struct list_head *iter; |
|
bool found = false; |
|
bool should_notify_rtnl = BOND_SLAVE_NOTIFY_LATER; |
|
|
|
if (curr_arp_slave && curr_active_slave) |
|
netdev_info(bond->dev, "PROBE: c_arp %s && cas %s BAD\n", |
|
curr_arp_slave->dev->name, |
|
curr_active_slave->dev->name); |
|
|
|
if (curr_active_slave) { |
|
bond_arp_send_all(bond, curr_active_slave); |
|
return should_notify_rtnl; |
|
} |
|
|
|
/* if we don't have a curr_active_slave, search for the next available |
|
* backup slave from the current_arp_slave and make it the candidate |
|
* for becoming the curr_active_slave |
|
*/ |
|
|
|
if (!curr_arp_slave) { |
|
curr_arp_slave = bond_first_slave_rcu(bond); |
|
if (!curr_arp_slave) |
|
return should_notify_rtnl; |
|
} |
|
|
|
bond_for_each_slave_rcu(bond, slave, iter) { |
|
if (!found && !before && bond_slave_is_up(slave)) |
|
before = slave; |
|
|
|
if (found && !new_slave && bond_slave_is_up(slave)) |
|
new_slave = slave; |
|
/* if the link state is up at this point, we |
|
* mark it down - this can happen if we have |
|
* simultaneous link failures and |
|
* reselect_active_interface doesn't make this |
|
* one the current slave so it is still marked |
|
* up when it is actually down |
|
*/ |
|
if (!bond_slave_is_up(slave) && slave->link == BOND_LINK_UP) { |
|
bond_set_slave_link_state(slave, BOND_LINK_DOWN, |
|
BOND_SLAVE_NOTIFY_LATER); |
|
if (slave->link_failure_count < UINT_MAX) |
|
slave->link_failure_count++; |
|
|
|
bond_set_slave_inactive_flags(slave, |
|
BOND_SLAVE_NOTIFY_LATER); |
|
|
|
slave_info(bond->dev, slave->dev, "backup interface is now down\n"); |
|
} |
|
if (slave == curr_arp_slave) |
|
found = true; |
|
} |
|
|
|
if (!new_slave && before) |
|
new_slave = before; |
|
|
|
if (!new_slave) |
|
goto check_state; |
|
|
|
bond_set_slave_link_state(new_slave, BOND_LINK_BACK, |
|
BOND_SLAVE_NOTIFY_LATER); |
|
bond_set_slave_active_flags(new_slave, BOND_SLAVE_NOTIFY_LATER); |
|
bond_arp_send_all(bond, new_slave); |
|
new_slave->last_link_up = jiffies; |
|
rcu_assign_pointer(bond->current_arp_slave, new_slave); |
|
|
|
check_state: |
|
bond_for_each_slave_rcu(bond, slave, iter) { |
|
if (slave->should_notify || slave->should_notify_link) { |
|
should_notify_rtnl = BOND_SLAVE_NOTIFY_NOW; |
|
break; |
|
} |
|
} |
|
return should_notify_rtnl; |
|
} |
|
|
|
static void bond_activebackup_arp_mon(struct bonding *bond) |
|
{ |
|
bool should_notify_peers = false; |
|
bool should_notify_rtnl = false; |
|
int delta_in_ticks; |
|
|
|
delta_in_ticks = msecs_to_jiffies(bond->params.arp_interval); |
|
|
|
if (!bond_has_slaves(bond)) |
|
goto re_arm; |
|
|
|
rcu_read_lock(); |
|
|
|
should_notify_peers = bond_should_notify_peers(bond); |
|
|
|
if (bond_ab_arp_inspect(bond)) { |
|
rcu_read_unlock(); |
|
|
|
/* Race avoidance with bond_close flush of workqueue */ |
|
if (!rtnl_trylock()) { |
|
delta_in_ticks = 1; |
|
should_notify_peers = false; |
|
goto re_arm; |
|
} |
|
|
|
bond_ab_arp_commit(bond); |
|
|
|
rtnl_unlock(); |
|
rcu_read_lock(); |
|
} |
|
|
|
should_notify_rtnl = bond_ab_arp_probe(bond); |
|
rcu_read_unlock(); |
|
|
|
re_arm: |
|
if (bond->params.arp_interval) |
|
queue_delayed_work(bond->wq, &bond->arp_work, delta_in_ticks); |
|
|
|
if (should_notify_peers || should_notify_rtnl) { |
|
if (!rtnl_trylock()) |
|
return; |
|
|
|
if (should_notify_peers) |
|
call_netdevice_notifiers(NETDEV_NOTIFY_PEERS, |
|
bond->dev); |
|
if (should_notify_rtnl) { |
|
bond_slave_state_notify(bond); |
|
bond_slave_link_notify(bond); |
|
} |
|
|
|
rtnl_unlock(); |
|
} |
|
} |
|
|
|
static void bond_arp_monitor(struct work_struct *work) |
|
{ |
|
struct bonding *bond = container_of(work, struct bonding, |
|
arp_work.work); |
|
|
|
if (BOND_MODE(bond) == BOND_MODE_ACTIVEBACKUP) |
|
bond_activebackup_arp_mon(bond); |
|
else |
|
bond_loadbalance_arp_mon(bond); |
|
} |
|
|
|
/*-------------------------- netdev event handling --------------------------*/ |
|
|
|
/* Change device name */ |
|
static int bond_event_changename(struct bonding *bond) |
|
{ |
|
bond_remove_proc_entry(bond); |
|
bond_create_proc_entry(bond); |
|
|
|
bond_debug_reregister(bond); |
|
|
|
return NOTIFY_DONE; |
|
} |
|
|
|
static int bond_master_netdev_event(unsigned long event, |
|
struct net_device *bond_dev) |
|
{ |
|
struct bonding *event_bond = netdev_priv(bond_dev); |
|
|
|
netdev_dbg(bond_dev, "%s called\n", __func__); |
|
|
|
switch (event) { |
|
case NETDEV_CHANGENAME: |
|
return bond_event_changename(event_bond); |
|
case NETDEV_UNREGISTER: |
|
bond_remove_proc_entry(event_bond); |
|
#ifdef CONFIG_XFRM_OFFLOAD |
|
xfrm_dev_state_flush(dev_net(bond_dev), bond_dev, true); |
|
#endif /* CONFIG_XFRM_OFFLOAD */ |
|
break; |
|
case NETDEV_REGISTER: |
|
bond_create_proc_entry(event_bond); |
|
break; |
|
default: |
|
break; |
|
} |
|
|
|
return NOTIFY_DONE; |
|
} |
|
|
|
static int bond_slave_netdev_event(unsigned long event, |
|
struct net_device *slave_dev) |
|
{ |
|
struct slave *slave = bond_slave_get_rtnl(slave_dev), *primary; |
|
struct bonding *bond; |
|
struct net_device *bond_dev; |
|
|
|
/* A netdev event can be generated while enslaving a device |
|
* before netdev_rx_handler_register is called in which case |
|
* slave will be NULL |
|
*/ |
|
if (!slave) { |
|
netdev_dbg(slave_dev, "%s called on NULL slave\n", __func__); |
|
return NOTIFY_DONE; |
|
} |
|
|
|
bond_dev = slave->bond->dev; |
|
bond = slave->bond; |
|
primary = rtnl_dereference(bond->primary_slave); |
|
|
|
slave_dbg(bond_dev, slave_dev, "%s called\n", __func__); |
|
|
|
switch (event) { |
|
case NETDEV_UNREGISTER: |
|
if (bond_dev->type != ARPHRD_ETHER) |
|
bond_release_and_destroy(bond_dev, slave_dev); |
|
else |
|
__bond_release_one(bond_dev, slave_dev, false, true); |
|
break; |
|
case NETDEV_UP: |
|
case NETDEV_CHANGE: |
|
/* For 802.3ad mode only: |
|
* Getting invalid Speed/Duplex values here will put slave |
|
* in weird state. Mark it as link-fail if the link was |
|
* previously up or link-down if it hasn't yet come up, and |
|
* let link-monitoring (miimon) set it right when correct |
|
* speeds/duplex are available. |
|
*/ |
|
if (bond_update_speed_duplex(slave) && |
|
BOND_MODE(bond) == BOND_MODE_8023AD) { |
|
if (slave->last_link_up) |
|
slave->link = BOND_LINK_FAIL; |
|
else |
|
slave->link = BOND_LINK_DOWN; |
|
} |
|
|
|
if (BOND_MODE(bond) == BOND_MODE_8023AD) |
|
bond_3ad_adapter_speed_duplex_changed(slave); |
|
fallthrough; |
|
case NETDEV_DOWN: |
|
/* 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_can_use_xmit_hash(bond)) |
|
bond_update_slave_arr(bond, NULL); |
|
break; |
|
case NETDEV_CHANGEMTU: |
|
/* 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 |
|
* MTUs may vary. For other modes, |
|
* slaves arguably should have the |
|
* same MTUs. To do this, we'd need to |
|
* take over the slave's change_mtu |
|
* function for the duration of their |
|
* servitude. |
|
*/ |
|
break; |
|
case NETDEV_CHANGENAME: |
|
/* we don't care if we don't have primary set */ |
|
if (!bond_uses_primary(bond) || |
|
!bond->params.primary[0]) |
|
break; |
|
|
|
if (slave == primary) { |
|
/* slave's name changed - he's no longer primary */ |
|
RCU_INIT_POINTER(bond->primary_slave, NULL); |
|
} else if (!strcmp(slave_dev->name, bond->params.primary)) { |
|
/* we have a new primary 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", |
|
primary ? slave_dev->name : "none"); |
|
|
|
block_netpoll_tx(); |
|
bond_select_active_slave(bond); |
|
unblock_netpoll_tx(); |
|
break; |
|
case NETDEV_FEAT_CHANGE: |
|
bond_compute_features(bond); |
|
break; |
|
case NETDEV_RESEND_IGMP: |
|
/* Propagate to master device */ |
|
call_netdevice_notifiers(event, slave->bond->dev); |
|
break; |
|
default: |
|
break; |
|
} |
|
|
|
return NOTIFY_DONE; |
|
} |
|
|
|
/* 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 |
|
* locks for us to safely manipulate the slave devices (RTNL lock, |
|
* dev_probe_lock). |
|
*/ |
|
static int bond_netdev_event(struct notifier_block *this, |
|
unsigned long event, void *ptr) |
|
{ |
|
struct net_device *event_dev = netdev_notifier_info_to_dev(ptr); |
|
|
|
netdev_dbg(event_dev, "%s received %s\n", |
|
__func__, netdev_cmd_to_name(event)); |
|
|
|
if (!(event_dev->priv_flags & IFF_BONDING)) |
|
return NOTIFY_DONE; |
|
|
|
if (event_dev->flags & IFF_MASTER) { |
|
int ret; |
|
|
|
ret = bond_master_netdev_event(event, event_dev); |
|
if (ret != NOTIFY_DONE) |
|
return ret; |
|
} |
|
|
|
if (event_dev->flags & IFF_SLAVE) |
|
return bond_slave_netdev_event(event, event_dev); |
|
|
|
return NOTIFY_DONE; |
|
} |
|
|
|
static struct notifier_block bond_netdev_notifier = { |
|
.notifier_call = bond_netdev_event, |
|
}; |
|
|
|
/*---------------------------- Hashing Policies -----------------------------*/ |
|
|
|
/* L2 hash helper */ |
|
static inline u32 bond_eth_hash(struct sk_buff *skb) |
|
{ |
|
struct ethhdr *ep, hdr_tmp; |
|
|
|
ep = skb_header_pointer(skb, 0, sizeof(hdr_tmp), &hdr_tmp); |
|
if (ep) |
|
return ep->h_dest[5] ^ ep->h_source[5] ^ ep->h_proto; |
|
return 0; |
|
} |
|
|
|
static bool bond_flow_ip(struct sk_buff *skb, struct flow_keys *fk, |
|
int *noff, int *proto, bool l34) |
|
{ |
|
const struct ipv6hdr *iph6; |
|
const struct iphdr *iph; |
|
|
|
if (skb->protocol == htons(ETH_P_IP)) { |
|
if (unlikely(!pskb_may_pull(skb, *noff + sizeof(*iph)))) |
|
return false; |
|
iph = (const struct iphdr *)(skb->data + *noff); |
|
iph_to_flow_copy_v4addrs(fk, iph); |
|
*noff += iph->ihl << 2; |
|
if (!ip_is_fragment(iph)) |
|
*proto = iph->protocol; |
|
} else if (skb->protocol == htons(ETH_P_IPV6)) { |
|
if (unlikely(!pskb_may_pull(skb, *noff + sizeof(*iph6)))) |
|
return false; |
|
iph6 = (const struct ipv6hdr *)(skb->data + *noff); |
|
iph_to_flow_copy_v6addrs(fk, iph6); |
|
*noff += sizeof(*iph6); |
|
*proto = iph6->nexthdr; |
|
} else { |
|
return false; |
|
} |
|
|
|
if (l34 && *proto >= 0) |
|
fk->ports.ports = skb_flow_get_ports(skb, *noff, *proto); |
|
|
|
return true; |
|
} |
|
|
|
/* Extract the appropriate headers based on bond's xmit policy */ |
|
static bool bond_flow_dissect(struct bonding *bond, struct sk_buff *skb, |
|
struct flow_keys *fk) |
|
{ |
|
bool l34 = bond->params.xmit_policy == BOND_XMIT_POLICY_LAYER34; |
|
int noff, proto = -1; |
|
|
|
if (bond->params.xmit_policy > BOND_XMIT_POLICY_LAYER23) { |
|
memset(fk, 0, sizeof(*fk)); |
|
return __skb_flow_dissect(NULL, skb, &flow_keys_bonding, |
|
fk, NULL, 0, 0, 0, 0); |
|
} |
|
|
|
fk->ports.ports = 0; |
|
memset(&fk->icmp, 0, sizeof(fk->icmp)); |
|
noff = skb_network_offset(skb); |
|
if (!bond_flow_ip(skb, fk, &noff, &proto, l34)) |
|
return false; |
|
|
|
/* ICMP error packets contains at least 8 bytes of the header |
|
* of the packet which generated the error. Use this information |
|
* to correlate ICMP error packets within the same flow which |
|
* generated the error. |
|
*/ |
|
if (proto == IPPROTO_ICMP || proto == IPPROTO_ICMPV6) { |
|
skb_flow_get_icmp_tci(skb, &fk->icmp, skb->data, |
|
skb_transport_offset(skb), |
|
skb_headlen(skb)); |
|
if (proto == IPPROTO_ICMP) { |
|
if (!icmp_is_err(fk->icmp.type)) |
|
return true; |
|
|
|
noff += sizeof(struct icmphdr); |
|
} else if (proto == IPPROTO_ICMPV6) { |
|
if (!icmpv6_is_err(fk->icmp.type)) |
|
return true; |
|
|
|
noff += sizeof(struct icmp6hdr); |
|
} |
|
return bond_flow_ip(skb, fk, &noff, &proto, l34); |
|
} |
|
|
|
return true; |
|
} |
|
|
|
/** |
|
* bond_xmit_hash - generate a hash value based on the xmit policy |
|
* @bond: bonding device |
|
* @skb: buffer to use for headers |
|
* |
|
* This function will extract the necessary headers from the skb buffer and use |
|
* them to generate a hash based on the xmit_policy set in the bonding device |
|
*/ |
|
u32 bond_xmit_hash(struct bonding *bond, struct sk_buff *skb) |
|
{ |
|
struct flow_keys flow; |
|
u32 hash; |
|
|
|
if (bond->params.xmit_policy == BOND_XMIT_POLICY_ENCAP34 && |
|
skb->l4_hash) |
|
return skb->hash; |
|
|
|
if (bond->params.xmit_policy == BOND_XMIT_POLICY_LAYER2 || |
|
!bond_flow_dissect(bond, skb, &flow)) |
|
return bond_eth_hash(skb); |
|
|
|
if (bond->params.xmit_policy == BOND_XMIT_POLICY_LAYER23 || |
|
bond->params.xmit_policy == BOND_XMIT_POLICY_ENCAP23) { |
|
hash = bond_eth_hash(skb); |
|
} else { |
|
if (flow.icmp.id) |
|
memcpy(&hash, &flow.icmp, sizeof(hash)); |
|
else |
|
memcpy(&hash, &flow.ports.ports, sizeof(hash)); |
|
} |
|
hash ^= (__force u32)flow_get_u32_dst(&flow) ^ |
|
(__force u32)flow_get_u32_src(&flow); |
|
hash ^= (hash >> 16); |
|
hash ^= (hash >> 8); |
|
|
|
return hash >> 1; |
|
} |
|
|
|
/*-------------------------- Device entry points ----------------------------*/ |
|
|
|
void bond_work_init_all(struct bonding *bond) |
|
{ |
|
INIT_DELAYED_WORK(&bond->mcast_work, |
|
bond_resend_igmp_join_requests_delayed); |
|
INIT_DELAYED_WORK(&bond->alb_work, bond_alb_monitor); |
|
INIT_DELAYED_WORK(&bond->mii_work, bond_mii_monitor); |
|
INIT_DELAYED_WORK(&bond->arp_work, bond_arp_monitor); |
|
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) |
|
{ |
|
cancel_delayed_work_sync(&bond->mii_work); |
|
cancel_delayed_work_sync(&bond->arp_work); |
|
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) |
|
{ |
|
struct bonding *bond = netdev_priv(bond_dev); |
|
struct list_head *iter; |
|
struct slave *slave; |
|
|
|
/* reset slave->backup and slave->inactive */ |
|
if (bond_has_slaves(bond)) { |
|
bond_for_each_slave(bond, slave, iter) { |
|
if (bond_uses_primary(bond) && |
|
slave != rcu_access_pointer(bond->curr_active_slave)) { |
|
bond_set_slave_inactive_flags(slave, |
|
BOND_SLAVE_NOTIFY_NOW); |
|
} else if (BOND_MODE(bond) != BOND_MODE_8023AD) { |
|
bond_set_slave_active_flags(slave, |
|
BOND_SLAVE_NOTIFY_NOW); |
|
} |
|
} |
|
} |
|
|
|
if (bond_is_lb(bond)) { |
|
/* bond_alb_initialize must be called before the timer |
|
* is started. |
|
*/ |
|
if (bond_alb_initialize(bond, (BOND_MODE(bond) == BOND_MODE_ALB))) |
|
return -ENOMEM; |
|
if (bond->params.tlb_dynamic_lb || BOND_MODE(bond) == BOND_MODE_ALB) |
|
queue_delayed_work(bond->wq, &bond->alb_work, 0); |
|
} |
|
|
|
if (bond->params.miimon) /* link check interval, in milliseconds. */ |
|
queue_delayed_work(bond->wq, &bond->mii_work, 0); |
|
|
|
if (bond->params.arp_interval) { /* arp interval, in milliseconds. */ |
|
queue_delayed_work(bond->wq, &bond->arp_work, 0); |
|
bond->recv_probe = bond_arp_rcv; |
|
} |
|
|
|
if (BOND_MODE(bond) == BOND_MODE_8023AD) { |
|
queue_delayed_work(bond->wq, &bond->ad_work, 0); |
|
/* register to receive LACPDUs */ |
|
bond->recv_probe = bond_3ad_lacpdu_recv; |
|
bond_3ad_initiate_agg_selection(bond, 1); |
|
} |
|
|
|
if (bond_mode_can_use_xmit_hash(bond)) |
|
bond_update_slave_arr(bond, NULL); |
|
|
|
return 0; |
|
} |
|
|
|
static int bond_close(struct net_device *bond_dev) |
|
{ |
|
struct bonding *bond = netdev_priv(bond_dev); |
|
|
|
bond_work_cancel_all(bond); |
|
bond->send_peer_notif = 0; |
|
if (bond_is_lb(bond)) |
|
bond_alb_deinitialize(bond); |
|
bond->recv_probe = NULL; |
|
|
|
return 0; |
|
} |
|
|
|
/* fold stats, assuming all rtnl_link_stats64 fields are u64, but |
|
* that some drivers can provide 32bit values only. |
|
*/ |
|
static void bond_fold_stats(struct rtnl_link_stats64 *_res, |
|
const struct rtnl_link_stats64 *_new, |
|
const struct rtnl_link_stats64 *_old) |
|
{ |
|
const u64 *new = (const u64 *)_new; |
|
const u64 *old = (const u64 *)_old; |
|
u64 *res = (u64 *)_res; |
|
int i; |
|
|
|
for (i = 0; i < sizeof(*_res) / sizeof(u64); i++) { |
|
u64 nv = new[i]; |
|
u64 ov = old[i]; |
|
s64 delta = nv - ov; |
|
|
|
/* detects if this particular field is 32bit only */ |
|
if (((nv | ov) >> 32) == 0) |
|
delta = (s64)(s32)((u32)nv - (u32)ov); |
|
|
|
/* filter anomalies, some drivers reset their stats |
|
* at down/up events. |
|
*/ |
|
if (delta > 0) |
|
res[i] += delta; |
|
} |
|
} |
|
|
|
#ifdef CONFIG_LOCKDEP |
|
static int bond_get_lowest_level_rcu(struct net_device *dev) |
|
{ |
|
struct net_device *ldev, *next, *now, *dev_stack[MAX_NEST_DEV + 1]; |
|
struct list_head *niter, *iter, *iter_stack[MAX_NEST_DEV + 1]; |
|
int cur = 0, max = 0; |
|
|
|
now = dev; |
|
iter = &dev->adj_list.lower; |
|
|
|
while (1) { |
|
next = NULL; |
|
while (1) { |
|
ldev = netdev_next_lower_dev_rcu(now, &iter); |
|
if (!ldev) |
|
break; |
|
|
|
next = ldev; |
|
niter = &ldev->adj_list.lower; |
|
dev_stack[cur] = now; |
|
iter_stack[cur++] = iter; |
|
if (max <= cur) |
|
max = cur; |
|
break; |
|
} |
|
|
|
if (!next) { |
|
if (!cur) |
|
return max; |
|
next = dev_stack[--cur]; |
|
niter = iter_stack[cur]; |
|
} |
|
|
|
now = next; |
|
iter = niter; |
|
} |
|
|
|
return max; |
|
} |
|
#endif |
|
|
|
static void bond_get_stats(struct net_device *bond_dev, |
|
struct rtnl_link_stats64 *stats) |
|
{ |
|
struct bonding *bond = netdev_priv(bond_dev); |
|
struct rtnl_link_stats64 temp; |
|
struct list_head *iter; |
|
struct slave *slave; |
|
int nest_level = 0; |
|
|
|
|
|
rcu_read_lock(); |
|
#ifdef CONFIG_LOCKDEP |
|
nest_level = bond_get_lowest_level_rcu(bond_dev); |
|
#endif |
|
|
|
spin_lock_nested(&bond->stats_lock, nest_level); |
|
memcpy(stats, &bond->bond_stats, sizeof(*stats)); |
|
|
|
bond_for_each_slave_rcu(bond, slave, iter) { |
|
const struct rtnl_link_stats64 *new = |
|
dev_get_stats(slave->dev, &temp); |
|
|
|
bond_fold_stats(stats, new, &slave->slave_stats); |
|
|
|
/* save off the slave stats for the next run */ |
|
memcpy(&slave->slave_stats, new, sizeof(*new)); |
|
} |
|
|
|
memcpy(&bond->bond_stats, stats, sizeof(*stats)); |
|
spin_unlock(&bond->stats_lock); |
|
rcu_read_unlock(); |
|
} |
|
|
|
static int bond_do_ioctl(struct net_device *bond_dev, struct ifreq *ifr, int cmd) |
|
{ |
|
struct bonding *bond = netdev_priv(bond_dev); |
|
struct net_device *slave_dev = NULL; |
|
struct ifbond k_binfo; |
|
struct ifbond __user *u_binfo = NULL; |
|
struct ifslave k_sinfo; |
|
struct ifslave __user *u_sinfo = NULL; |
|
struct mii_ioctl_data *mii = NULL; |
|
struct bond_opt_value newval; |
|
struct net *net; |
|
int res = 0; |
|
|
|
netdev_dbg(bond_dev, "bond_ioctl: cmd=%d\n", cmd); |
|
|
|
switch (cmd) { |
|
case SIOCGMIIPHY: |
|
mii = if_mii(ifr); |
|
if (!mii) |
|
return -EINVAL; |
|
|
|
mii->phy_id = 0; |
|
fallthrough; |
|
case 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; |
|
if (netif_carrier_ok(bond->dev)) |
|
mii->val_out = BMSR_LSTATUS; |
|
} |
|
|
|
return 0; |
|
case BOND_INFO_QUERY_OLD: |
|
case SIOCBONDINFOQUERY: |
|
u_binfo = (struct ifbond __user *)ifr->ifr_data; |
|
|
|
if (copy_from_user(&k_binfo, u_binfo, sizeof(ifbond))) |
|
return -EFAULT; |
|
|
|
bond_info_query(bond_dev, &k_binfo); |
|
if (copy_to_user(u_binfo, &k_binfo, sizeof(ifbond))) |
|
return -EFAULT; |
|
|
|
return 0; |
|
case BOND_SLAVE_INFO_QUERY_OLD: |
|
case SIOCBONDSLAVEINFOQUERY: |
|
u_sinfo = (struct ifslave __user *)ifr->ifr_data; |
|
|
|
if (copy_from_user(&k_sinfo, u_sinfo, sizeof(ifslave))) |
|
return -EFAULT; |
|
|
|
res = bond_slave_info_query(bond_dev, &k_sinfo); |
|
if (res == 0 && |
|
copy_to_user(u_sinfo, &k_sinfo, sizeof(ifslave))) |
|
return -EFAULT; |
|
|
|
return res; |
|
default: |
|
break; |
|
} |
|
|
|
net = dev_net(bond_dev); |
|
|
|
if (!ns_capable(net->user_ns, CAP_NET_ADMIN)) |
|
return -EPERM; |
|
|
|
slave_dev = __dev_get_by_name(net, ifr->ifr_slave); |
|
|
|
slave_dbg(bond_dev, slave_dev, "slave_dev=%p:\n", slave_dev); |
|
|
|
if (!slave_dev) |
|
return -ENODEV; |
|
|
|
switch (cmd) { |
|
case BOND_ENSLAVE_OLD: |
|
case SIOCBONDENSLAVE: |
|
res = bond_enslave(bond_dev, slave_dev, NULL); |
|
break; |
|
case BOND_RELEASE_OLD: |
|
case SIOCBONDRELEASE: |
|
res = bond_release(bond_dev, slave_dev); |
|
break; |
|
case BOND_SETHWADDR_OLD: |
|
case SIOCBONDSETHWADDR: |
|
res = bond_set_dev_addr(bond_dev, slave_dev); |
|
break; |
|
case BOND_CHANGE_ACTIVE_OLD: |
|
case SIOCBONDCHANGEACTIVE: |
|
bond_opt_initstr(&newval, slave_dev->name); |
|
res = __bond_opt_set_notify(bond, BOND_OPT_ACTIVE_SLAVE, |
|
&newval); |
|
break; |
|
default: |
|
res = -EOPNOTSUPP; |
|
} |
|
|
|
return res; |
|
} |
|
|
|
static void bond_change_rx_flags(struct net_device *bond_dev, int change) |
|
{ |
|
struct bonding *bond = netdev_priv(bond_dev); |
|
|
|
if (change & IFF_PROMISC) |
|
bond_set_promiscuity(bond, |
|
bond_dev->flags & IFF_PROMISC ? 1 : -1); |
|
|
|
if (change & IFF_ALLMULTI) |
|
bond_set_allmulti(bond, |
|
bond_dev->flags & IFF_ALLMULTI ? 1 : -1); |
|
} |
|
|
|
static void bond_set_rx_mode(struct net_device *bond_dev) |
|
{ |
|
struct bonding *bond = netdev_priv(bond_dev); |
|
struct list_head *iter; |
|
struct slave *slave; |
|
|
|
rcu_read_lock(); |
|
if (bond_uses_primary(bond)) { |
|
slave = rcu_dereference(bond->curr_active_slave); |
|
if (slave) { |
|
dev_uc_sync(slave->dev, bond_dev); |
|
dev_mc_sync(slave->dev, bond_dev); |
|
} |
|
} else { |
|
bond_for_each_slave_rcu(bond, slave, iter) { |
|
dev_uc_sync_multiple(slave->dev, bond_dev); |
|
dev_mc_sync_multiple(slave->dev, bond_dev); |
|
} |
|
} |
|
rcu_read_unlock(); |
|
} |
|
|
|
static int bond_neigh_init(struct neighbour *n) |
|
{ |
|
struct bonding *bond = netdev_priv(n->dev); |
|
const struct net_device_ops *slave_ops; |
|
struct neigh_parms parms; |
|
struct slave *slave; |
|
int ret = 0; |
|
|
|
rcu_read_lock(); |
|
slave = bond_first_slave_rcu(bond); |
|
if (!slave) |
|
goto out; |
|
slave_ops = slave->dev->netdev_ops; |
|
if (!slave_ops->ndo_neigh_setup) |
|
goto out; |
|
|
|
/* TODO: find another way [1] to implement this. |
|
* Passing a zeroed structure is fragile, |
|
* but at least we do not pass garbage. |
|
* |
|
* [1] One way would be that ndo_neigh_setup() never touch |
|
* struct neigh_parms, but propagate the new neigh_setup() |
|
* back to ___neigh_create() / neigh_parms_alloc() |
|
*/ |
|
memset(&parms, 0, sizeof(parms)); |
|
ret = slave_ops->ndo_neigh_setup(slave->dev, &parms); |
|
|
|
if (ret) |
|
goto out; |
|
|
|
if (parms.neigh_setup) |
|
ret = parms.neigh_setup(n); |
|
out: |
|
rcu_read_unlock(); |
|
return ret; |
|
} |
|
|
|
/* 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. |
|
* |
|
* It's also called by master devices (such as vlans) to setup their |
|
* underlying devices. In that case - do nothing, we're already set up from |
|
* our init. |
|
*/ |
|
static int bond_neigh_setup(struct net_device *dev, |
|
struct neigh_parms *parms) |
|
{ |
|
/* modify only our neigh_parms */ |
|
if (parms->dev == dev) |
|
parms->neigh_setup = bond_neigh_init; |
|
|
|
return 0; |
|
} |
|
|
|
/* 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); |
|
struct slave *slave, *rollback_slave; |
|
struct list_head *iter; |
|
int res = 0; |
|
|
|
netdev_dbg(bond_dev, "bond=%p, new_mtu=%d\n", bond, new_mtu); |
|
|
|
bond_for_each_slave(bond, slave, iter) { |
|
slave_dbg(bond_dev, slave->dev, "s %p c_m %p\n", |
|
slave, slave->dev->netdev_ops->ndo_change_mtu); |
|
|
|
res = dev_set_mtu(slave->dev, new_mtu); |
|
|
|
if (res) { |
|
/* If we failed to set the slave's mtu to the new value |
|
* we must abort the operation even in ACTIVE_BACKUP |
|
* mode, because if we allow the backup slaves to have |
|
* different mtu values than the active slave we'll |
|
* need to change their mtu when doing a failover. That |
|
* means changing their mtu from timer context, which |
|
* is probably not a good idea. |
|
*/ |
|
slave_dbg(bond_dev, slave->dev, "err %d setting mtu to %d\n", |
|
res, new_mtu); |
|
goto unwind; |
|
} |
|
} |
|
|
|
bond_dev->mtu = new_mtu; |
|
|
|
return 0; |
|
|
|
unwind: |
|
/* unwind from head to the slave that failed */ |
|
bond_for_each_slave(bond, rollback_slave, iter) { |
|
int tmp_res; |
|
|
|
if (rollback_slave == slave) |
|
break; |
|
|
|
tmp_res = dev_set_mtu(rollback_slave->dev, bond_dev->mtu); |
|
if (tmp_res) |
|
slave_dbg(bond_dev, rollback_slave->dev, "unwind err %d\n", |
|
tmp_res); |
|
} |
|
|
|
return res; |
|
} |
|
|
|
/* 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 |
|
* bonding devices to test this, however. |
|
*/ |
|
static int bond_set_mac_address(struct net_device *bond_dev, void *addr) |
|
{ |
|
struct bonding *bond = netdev_priv(bond_dev); |
|
struct slave *slave, *rollback_slave; |
|
struct sockaddr_storage *ss = addr, tmp_ss; |
|
struct list_head *iter; |
|
int res = 0; |
|
|
|
if (BOND_MODE(bond) == BOND_MODE_ALB) |
|
return bond_alb_set_mac_address(bond_dev, addr); |
|
|
|
|
|
netdev_dbg(bond_dev, "%s: bond=%p\n", __func__, bond); |
|
|
|
/* If fail_over_mac is enabled, do nothing and return success. |
|
* Returning an error causes ifenslave to fail. |
|
*/ |
|
if (bond->params.fail_over_mac && |
|
BOND_MODE(bond) == BOND_MODE_ACTIVEBACKUP) |
|
return 0; |
|
|
|
if (!is_valid_ether_addr(ss->__data)) |
|
return -EADDRNOTAVAIL; |
|
|
|
bond_for_each_slave(bond, slave, iter) { |
|
slave_dbg(bond_dev, slave->dev, "%s: slave=%p\n", |
|
__func__, slave); |
|
res = dev_set_mac_address(slave->dev, addr, NULL); |
|
if (res) { |
|
/* TODO: consider downing the slave |
|
* and retry ? |
|
* User should expect communications |
|
* breakage anyway until ARP finish |
|
* updating, so... |
|
*/ |
|
slave_dbg(bond_dev, slave->dev, "%s: err %d\n", |
|
__func__, res); |
|
goto unwind; |
|
} |
|
} |
|
|
|
/* success */ |
|
memcpy(bond_dev->dev_addr, ss->__data, bond_dev->addr_len); |
|
return 0; |
|
|
|
unwind: |
|
memcpy(tmp_ss.__data, bond_dev->dev_addr, bond_dev->addr_len); |
|
tmp_ss.ss_family = bond_dev->type; |
|
|
|
/* unwind from head to the slave that failed */ |
|
bond_for_each_slave(bond, rollback_slave, iter) { |
|
int tmp_res; |
|
|
|
if (rollback_slave == slave) |
|
break; |
|
|
|
tmp_res = dev_set_mac_address(rollback_slave->dev, |
|
(struct sockaddr *)&tmp_ss, NULL); |
|
if (tmp_res) { |
|
slave_dbg(bond_dev, rollback_slave->dev, "%s: unwind err %d\n", |
|
__func__, tmp_res); |
|
} |
|
} |
|
|
|
return res; |
|
} |
|
|
|
/** |
|
* bond_get_slave_by_id - get xmit slave with slave_id |
|
* @bond: bonding device that is transmitting |
|
* @slave_id: slave id up to slave_cnt-1 through which to transmit |
|
* |
|
* This function tries to get slave with slave_id but in case |
|
* it fails, it tries to find the first available slave for transmission. |
|
*/ |
|
static struct slave *bond_get_slave_by_id(struct bonding *bond, |
|
int slave_id) |
|
{ |
|
struct list_head *iter; |
|
struct slave *slave; |
|
int i = slave_id; |
|
|
|
/* Here we start from the slave with slave_id */ |
|
bond_for_each_slave_rcu(bond, slave, iter) { |
|
if (--i < 0) { |
|
if (bond_slave_can_tx(slave)) |
|
return slave; |
|
} |
|
} |
|
|
|
/* Here we start from the first slave up to slave_id */ |
|
i = slave_id; |
|
bond_for_each_slave_rcu(bond, slave, iter) { |
|
if (--i < 0) |
|
break; |
|
if (bond_slave_can_tx(slave)) |
|
return slave; |
|
} |
|
/* no slave that can tx has been found */ |
|
return NULL; |
|
} |
|
|
|
/** |
|
* bond_rr_gen_slave_id - generate slave id based on packets_per_slave |
|
* @bond: bonding device to use |
|
* |
|
* Based on the value of the bonding device's packets_per_slave parameter |
|
* this function generates a slave id, which is usually used as the next |
|
* slave to transmit through. |
|
*/ |
|
static u32 bond_rr_gen_slave_id(struct bonding *bond) |
|
{ |
|
u32 slave_id; |
|
struct reciprocal_value reciprocal_packets_per_slave; |
|
int packets_per_slave = bond->params.packets_per_slave; |
|
|
|
switch (packets_per_slave) { |
|
case 0: |
|
slave_id = prandom_u32(); |
|
break; |
|
case 1: |
|
slave_id = bond->rr_tx_counter; |
|
break; |
|
default: |
|
reciprocal_packets_per_slave = |
|
bond->params.reciprocal_packets_per_slave; |
|
slave_id = reciprocal_divide(bond->rr_tx_counter, |
|
reciprocal_packets_per_slave); |
|
break; |
|
} |
|
bond->rr_tx_counter++; |
|
|
|
return slave_id; |
|
} |
|
|
|
static struct slave *bond_xmit_roundrobin_slave_get(struct bonding *bond, |
|
struct sk_buff *skb) |
|
{ |
|
struct slave *slave; |
|
int slave_cnt; |
|
u32 slave_id; |
|
|
|
/* Start with the curr_active_slave that joined the bond as the |
|
* default for sending IGMP traffic. For failover purposes one |
|
* needs to maintain some consistency for the interface that will |
|
* send the join/membership reports. The curr_active_slave found |
|
* will send all of this type of traffic. |
|
*/ |
|
if (skb->protocol == htons(ETH_P_IP)) { |
|
int noff = skb_network_offset(skb); |
|
struct iphdr *iph; |
|
|
|
if (unlikely(!pskb_may_pull(skb, noff + sizeof(*iph)))) |
|
goto non_igmp; |
|
|
|
iph = ip_hdr(skb); |
|
if (iph->protocol == IPPROTO_IGMP) { |
|
slave = rcu_dereference(bond->curr_active_slave); |
|
if (slave) |
|
return slave; |
|
return bond_get_slave_by_id(bond, 0); |
|
} |
|
} |
|
|
|
non_igmp: |
|
slave_cnt = READ_ONCE(bond->slave_cnt); |
|
if (likely(slave_cnt)) { |
|
slave_id = bond_rr_gen_slave_id(bond) % slave_cnt; |
|
return bond_get_slave_by_id(bond, slave_id); |
|
} |
|
return NULL; |
|
} |
|
|
|
static netdev_tx_t bond_xmit_roundrobin(struct sk_buff *skb, |
|
struct net_device *bond_dev) |
|
{ |
|
struct bonding *bond = netdev_priv(bond_dev); |
|
struct slave *slave; |
|
|
|
slave = bond_xmit_roundrobin_slave_get(bond, skb); |
|
if (likely(slave)) |
|
return bond_dev_queue_xmit(bond, skb, slave->dev); |
|
|
|
return bond_tx_drop(bond_dev, skb); |
|
} |
|
|
|
static struct slave *bond_xmit_activebackup_slave_get(struct bonding *bond, |
|
struct sk_buff *skb) |
|
{ |
|
return rcu_dereference(bond->curr_active_slave); |
|
} |
|
|
|
/* In active-backup mode, we know that bond->curr_active_slave is always valid if |
|
* the bond has a usable interface. |
|
*/ |
|
static netdev_tx_t bond_xmit_activebackup(struct sk_buff *skb, |
|
struct net_device *bond_dev) |
|
{ |
|
struct bonding *bond = netdev_priv(bond_dev); |
|
struct slave *slave; |
|
|
|
slave = bond_xmit_activebackup_slave_get(bond, skb); |
|
if (slave) |
|
return bond_dev_queue_xmit(bond, skb, slave->dev); |
|
|
|
return bond_tx_drop(bond_dev, skb); |
|
} |
|
|
|
/* 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. |
|
*/ |
|
void bond_slave_arr_work_rearm(struct bonding *bond, unsigned long delay) |
|
{ |
|
queue_delayed_work(bond->wq, &bond->slave_arr_work, delay); |
|
} |
|
|
|
/* 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); |
|
} |
|
|
|
static void bond_skip_slave(struct bond_up_slave *slaves, |
|
struct slave *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. |
|
*/ |
|
for (idx = 0; slaves && idx < slaves->count; idx++) { |
|
if (skipslave == slaves->arr[idx]) { |
|
slaves->arr[idx] = |
|
slaves->arr[slaves->count - 1]; |
|
slaves->count--; |
|
break; |
|
} |
|
} |
|
} |
|
|
|
static void bond_set_slave_arr(struct bonding *bond, |
|
struct bond_up_slave *usable_slaves, |
|
struct bond_up_slave *all_slaves) |
|
{ |
|
struct bond_up_slave *usable, *all; |
|
|
|
usable = rtnl_dereference(bond->usable_slaves); |
|
rcu_assign_pointer(bond->usable_slaves, usable_slaves); |
|
kfree_rcu(usable, rcu); |
|
|
|
all = rtnl_dereference(bond->all_slaves); |
|
rcu_assign_pointer(bond->all_slaves, all_slaves); |
|
kfree_rcu(all, rcu); |
|
} |
|
|
|
static void bond_reset_slave_arr(struct bonding *bond) |
|
{ |
|
struct bond_up_slave *usable, *all; |
|
|
|
usable = rtnl_dereference(bond->usable_slaves); |
|
if (usable) { |
|
RCU_INIT_POINTER(bond->usable_slaves, NULL); |
|
kfree_rcu(usable, rcu); |
|
} |
|
|
|
all = rtnl_dereference(bond->all_slaves); |
|
if (all) { |
|
RCU_INIT_POINTER(bond->all_slaves, NULL); |
|
kfree_rcu(all, rcu); |
|
} |
|
} |
|
|
|
/* 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 || BOND_MODE_ALB) && 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 bond_up_slave *usable_slaves = NULL, *all_slaves = NULL; |
|
struct slave *slave; |
|
struct list_head *iter; |
|
int agg_id = 0; |
|
int ret = 0; |
|
|
|
#ifdef CONFIG_LOCKDEP |
|
WARN_ON(lockdep_is_held(&bond->mode_lock)); |
|
#endif |
|
|
|
usable_slaves = kzalloc(struct_size(usable_slaves, arr, |
|
bond->slave_cnt), GFP_KERNEL); |
|
all_slaves = kzalloc(struct_size(all_slaves, arr, |
|
bond->slave_cnt), GFP_KERNEL); |
|
if (!usable_slaves || !all_slaves) { |
|
ret = -ENOMEM; |
|
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"); |
|
/* No active aggragator means it's not safe to use |
|
* the previous array. |
|
*/ |
|
bond_reset_slave_arr(bond); |
|
goto out; |
|
} |
|
agg_id = ad_info.aggregator_id; |
|
} |
|
bond_for_each_slave(bond, slave, iter) { |
|
if (skipslave == slave) |
|
continue; |
|
|
|
all_slaves->arr[all_slaves->count++] = slave; |
|
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; |
|
|
|
slave_dbg(bond->dev, slave->dev, "Adding slave to tx hash array[%d]\n", |
|
usable_slaves->count); |
|
|
|
usable_slaves->arr[usable_slaves->count++] = slave; |
|
} |
|
|
|
bond_set_slave_arr(bond, usable_slaves, all_slaves); |
|
return ret; |
|
out: |
|
if (ret != 0 && skipslave) { |
|
bond_skip_slave(rtnl_dereference(bond->all_slaves), |
|
skipslave); |
|
bond_skip_slave(rtnl_dereference(bond->usable_slaves), |
|
skipslave); |
|
} |
|
kfree_rcu(all_slaves, rcu); |
|
kfree_rcu(usable_slaves, rcu); |
|
|
|
return ret; |
|
} |
|
|
|
static struct slave *bond_xmit_3ad_xor_slave_get(struct bonding *bond, |
|
struct sk_buff *skb, |
|
struct bond_up_slave *slaves) |
|
{ |
|
struct slave *slave; |
|
unsigned int count; |
|
u32 hash; |
|
|
|
hash = bond_xmit_hash(bond, skb); |
|
count = slaves ? READ_ONCE(slaves->count) : 0; |
|
if (unlikely(!count)) |
|
return NULL; |
|
|
|
slave = slaves->arr[hash % count]; |
|
return slave; |
|
} |
|
|
|
/* 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. |
|
*/ |
|
static netdev_tx_t bond_3ad_xor_xmit(struct sk_buff *skb, |
|
struct net_device *dev) |
|
{ |
|
struct bonding *bond = netdev_priv(dev); |
|
struct bond_up_slave *slaves; |
|
struct slave *slave; |
|
|
|
slaves = rcu_dereference(bond->usable_slaves); |
|
slave = bond_xmit_3ad_xor_slave_get(bond, skb, slaves); |
|
if (likely(slave)) |
|
return bond_dev_queue_xmit(bond, skb, slave->dev); |
|
|
|
return bond_tx_drop(dev, skb); |
|
} |
|
|
|
/* in broadcast mode, we send everything to all usable interfaces. */ |
|
static netdev_tx_t bond_xmit_broadcast(struct sk_buff *skb, |
|
struct net_device *bond_dev) |
|
{ |
|
struct bonding *bond = netdev_priv(bond_dev); |
|
struct slave *slave = NULL; |
|
struct list_head *iter; |
|
|
|
bond_for_each_slave_rcu(bond, slave, iter) { |
|
if (bond_is_last_slave(bond, slave)) |
|
break; |
|
if (bond_slave_is_up(slave) && slave->link == BOND_LINK_UP) { |
|
struct sk_buff *skb2 = skb_clone(skb, GFP_ATOMIC); |
|
|
|
if (!skb2) { |
|
net_err_ratelimited("%s: Error: %s: skb_clone() failed\n", |
|
bond_dev->name, __func__); |
|
continue; |
|
} |
|
bond_dev_queue_xmit(bond, skb2, slave->dev); |
|
} |
|
} |
|
if (slave && bond_slave_is_up(slave) && slave->link == BOND_LINK_UP) |
|
return bond_dev_queue_xmit(bond, skb, slave->dev); |
|
|
|
return bond_tx_drop(bond_dev, skb); |
|
} |
|
|
|
/*------------------------- Device initialization ---------------------------*/ |
|
|
|
/* Lookup the slave that corresponds to a qid */ |
|
static inline int bond_slave_override(struct bonding *bond, |
|
struct sk_buff *skb) |
|
{ |
|
struct slave *slave = NULL; |
|
struct list_head *iter; |
|
|
|
if (!skb_rx_queue_recorded(skb)) |
|
return 1; |
|
|
|
/* Find out if any slaves have the same mapping as this skb. */ |
|
bond_for_each_slave_rcu(bond, slave, iter) { |
|
if (slave->queue_id == skb_get_queue_mapping(skb)) { |
|
if (bond_slave_is_up(slave) && |
|
slave->link == BOND_LINK_UP) { |
|
bond_dev_queue_xmit(bond, skb, slave->dev); |
|
return 0; |
|
} |
|
/* If the slave isn't UP, use default transmit policy. */ |
|
break; |
|
} |
|
} |
|
|
|
return 1; |
|
} |
|
|
|
|
|
static u16 bond_select_queue(struct net_device *dev, struct sk_buff *skb, |
|
struct net_device *sb_dev) |
|
{ |
|
/* 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 */ |
|
qdisc_skb_cb(skb)->slave_dev_queue_mapping = skb_get_queue_mapping(skb); |
|
|
|
if (unlikely(txq >= dev->real_num_tx_queues)) { |
|
do { |
|
txq -= dev->real_num_tx_queues; |
|
} while (txq >= dev->real_num_tx_queues); |
|
} |
|
return txq; |
|
} |
|
|
|
static struct net_device *bond_xmit_get_slave(struct net_device *master_dev, |
|
struct sk_buff *skb, |
|
bool all_slaves) |
|
{ |
|
struct bonding *bond = netdev_priv(master_dev); |
|
struct bond_up_slave *slaves; |
|
struct slave *slave = NULL; |
|
|
|
switch (BOND_MODE(bond)) { |
|
case BOND_MODE_ROUNDROBIN: |
|
slave = bond_xmit_roundrobin_slave_get(bond, skb); |
|
break; |
|
case BOND_MODE_ACTIVEBACKUP: |
|
slave = bond_xmit_activebackup_slave_get(bond, skb); |
|
break; |
|
case BOND_MODE_8023AD: |
|
case BOND_MODE_XOR: |
|
if (all_slaves) |
|
slaves = rcu_dereference(bond->all_slaves); |
|
else |
|
slaves = rcu_dereference(bond->usable_slaves); |
|
slave = bond_xmit_3ad_xor_slave_get(bond, skb, slaves); |
|
break; |
|
case BOND_MODE_BROADCAST: |
|
break; |
|
case BOND_MODE_ALB: |
|
slave = bond_xmit_alb_slave_get(bond, skb); |
|
break; |
|
case BOND_MODE_TLB: |
|
slave = bond_xmit_tlb_slave_get(bond, skb); |
|
break; |
|
default: |
|
/* Should never happen, mode already checked */ |
|
WARN_ONCE(true, "Unknown bonding mode"); |
|
break; |
|
} |
|
|
|
if (slave) |
|
return slave->dev; |
|
return NULL; |
|
} |
|
|
|
static netdev_tx_t __bond_start_xmit(struct sk_buff *skb, struct net_device *dev) |
|
{ |
|
struct bonding *bond = netdev_priv(dev); |
|
|
|
if (bond_should_override_tx_queue(bond) && |
|
!bond_slave_override(bond, skb)) |
|
return NETDEV_TX_OK; |
|
|
|
switch (BOND_MODE(bond)) { |
|
case BOND_MODE_ROUNDROBIN: |
|
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_3ad_xor_xmit(skb, dev); |
|
case BOND_MODE_BROADCAST: |
|
return bond_xmit_broadcast(skb, dev); |
|
case BOND_MODE_ALB: |
|
return bond_alb_xmit(skb, dev); |
|
case BOND_MODE_TLB: |
|
return bond_tlb_xmit(skb, dev); |
|
default: |
|
/* Should never happen, mode already checked */ |
|
netdev_err(dev, "Unknown bonding mode %d\n", BOND_MODE(bond)); |
|
WARN_ON_ONCE(1); |
|
return bond_tx_drop(dev, skb); |
|
} |
|
} |
|
|
|
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 |
|
* netpoll path, tell netpoll to queue the frame for later tx |
|
*/ |
|
if (unlikely(is_netpoll_tx_blocked(dev))) |
|
return NETDEV_TX_BUSY; |
|
|
|
rcu_read_lock(); |
|
if (bond_has_slaves(bond)) |
|
ret = __bond_start_xmit(skb, dev); |
|
else |
|
ret = bond_tx_drop(dev, skb); |
|
rcu_read_unlock(); |
|
|
|
return ret; |
|
} |
|
|
|
static u32 bond_mode_bcast_speed(struct slave *slave, u32 speed) |
|
{ |
|
if (speed == 0 || speed == SPEED_UNKNOWN) |
|
speed = slave->speed; |
|
else |
|
speed = min(speed, slave->speed); |
|
|
|
return speed; |
|
} |
|
|
|
static int bond_ethtool_get_link_ksettings(struct net_device *bond_dev, |
|
struct ethtool_link_ksettings *cmd) |
|
{ |
|
struct bonding *bond = netdev_priv(bond_dev); |
|
struct list_head *iter; |
|
struct slave *slave; |
|
u32 speed = 0; |
|
|
|
cmd->base.duplex = DUPLEX_UNKNOWN; |
|
cmd->base.port = PORT_OTHER; |
|
|
|
/* Since bond_slave_can_tx returns false for all inactive or down slaves, we |
|
* do not need to check mode. Though link speed might not represent |
|
* the true receive or transmit bandwidth (not all modes are symmetric) |
|
* this is an accurate maximum. |
|
*/ |
|
bond_for_each_slave(bond, slave, iter) { |
|
if (bond_slave_can_tx(slave)) { |
|
if (slave->speed != SPEED_UNKNOWN) { |
|
if (BOND_MODE(bond) == BOND_MODE_BROADCAST) |
|
speed = bond_mode_bcast_speed(slave, |
|
speed); |
|
else |
|
speed += slave->speed; |
|
} |
|
if (cmd->base.duplex == DUPLEX_UNKNOWN && |
|
slave->duplex != DUPLEX_UNKNOWN) |
|
cmd->base.duplex = slave->duplex; |
|
} |
|
} |
|
cmd->base.speed = speed ? : SPEED_UNKNOWN; |
|
|
|
return 0; |
|
} |
|
|
|
static void bond_ethtool_get_drvinfo(struct net_device *bond_dev, |
|
struct ethtool_drvinfo *drvinfo) |
|
{ |
|
strlcpy(drvinfo->driver, DRV_NAME, sizeof(drvinfo->driver)); |
|
snprintf(drvinfo->fw_version, sizeof(drvinfo->fw_version), "%d", |
|
BOND_ABI_VERSION); |
|
} |
|
|
|
static const struct ethtool_ops bond_ethtool_ops = { |
|
.get_drvinfo = bond_ethtool_get_drvinfo, |
|
.get_link = ethtool_op_get_link, |
|
.get_link_ksettings = bond_ethtool_get_link_ksettings, |
|
}; |
|
|
|
static const struct net_device_ops bond_netdev_ops = { |
|
.ndo_init = bond_init, |
|
.ndo_uninit = bond_uninit, |
|
.ndo_open = bond_open, |
|
.ndo_stop = bond_close, |
|
.ndo_start_xmit = bond_start_xmit, |
|
.ndo_select_queue = bond_select_queue, |
|
.ndo_get_stats64 = bond_get_stats, |
|
.ndo_do_ioctl = bond_do_ioctl, |
|
.ndo_change_rx_flags = bond_change_rx_flags, |
|
.ndo_set_rx_mode = bond_set_rx_mode, |
|
.ndo_change_mtu = bond_change_mtu, |
|
.ndo_set_mac_address = bond_set_mac_address, |
|
.ndo_neigh_setup = bond_neigh_setup, |
|
.ndo_vlan_rx_add_vid = bond_vlan_rx_add_vid, |
|
.ndo_vlan_rx_kill_vid = bond_vlan_rx_kill_vid, |
|
#ifdef CONFIG_NET_POLL_CONTROLLER |
|
.ndo_netpoll_setup = bond_netpoll_setup, |
|
.ndo_netpoll_cleanup = bond_netpoll_cleanup, |
|
.ndo_poll_controller = bond_poll_controller, |
|
#endif |
|
.ndo_add_slave = bond_enslave, |
|
.ndo_del_slave = bond_release, |
|
.ndo_fix_features = bond_fix_features, |
|
.ndo_features_check = passthru_features_check, |
|
.ndo_get_xmit_slave = bond_xmit_get_slave, |
|
}; |
|
|
|
static const struct device_type bond_type = { |
|
.name = "bond", |
|
}; |
|
|
|
static void bond_destructor(struct net_device *bond_dev) |
|
{ |
|
struct bonding *bond = netdev_priv(bond_dev); |
|
if (bond->wq) |
|
destroy_workqueue(bond->wq); |
|
} |
|
|
|
void bond_setup(struct net_device *bond_dev) |
|
{ |
|
struct bonding *bond = netdev_priv(bond_dev); |
|
|
|
spin_lock_init(&bond->mode_lock); |
|
bond->params = bonding_defaults; |
|
|
|
/* Initialize pointers */ |
|
bond->dev = bond_dev; |
|
|
|
/* Initialize the device entry points */ |
|
ether_setup(bond_dev); |
|
bond_dev->max_mtu = ETH_MAX_MTU; |
|
bond_dev->netdev_ops = &bond_netdev_ops; |
|
bond_dev->ethtool_ops = &bond_ethtool_ops; |
|
|
|
bond_dev->needs_free_netdev = true; |
|
bond_dev->priv_destructor = bond_destructor; |
|
|
|
SET_NETDEV_DEVTYPE(bond_dev, &bond_type); |
|
|
|
/* Initialize the device options */ |
|
bond_dev->flags |= IFF_MASTER; |
|
bond_dev->priv_flags |= IFF_BONDING | IFF_UNICAST_FLT | IFF_NO_QUEUE; |
|
bond_dev->priv_flags &= ~(IFF_XMIT_DST_RELEASE | IFF_TX_SKB_SHARING); |
|
|
|
#ifdef CONFIG_XFRM_OFFLOAD |
|
/* set up xfrm device ops (only supported in active-backup right now) */ |
|
bond_dev->xfrmdev_ops = &bond_xfrmdev_ops; |
|
INIT_LIST_HEAD(&bond->ipsec_list); |
|
spin_lock_init(&bond->ipsec_lock); |
|
#endif /* CONFIG_XFRM_OFFLOAD */ |
|
|
|
/* 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 |
|
* VLAN hardware accelerated capable. Special |
|
* care is taken in the various xmit functions |
|
* when there are slaves that are not hw accel |
|
* capable |
|
*/ |
|
|
|
/* Don't allow bond devices to change network namespaces. */ |
|
bond_dev->features |= NETIF_F_NETNS_LOCAL; |
|
|
|
bond_dev->hw_features = BOND_VLAN_FEATURES | |
|
NETIF_F_HW_VLAN_CTAG_RX | |
|
NETIF_F_HW_VLAN_CTAG_FILTER; |
|
|
|
bond_dev->hw_features |= NETIF_F_GSO_ENCAP_ALL | NETIF_F_GSO_UDP_L4; |
|
#ifdef CONFIG_XFRM_OFFLOAD |
|
bond_dev->hw_features |= BOND_XFRM_FEATURES; |
|
#endif /* CONFIG_XFRM_OFFLOAD */ |
|
bond_dev->features |= bond_dev->hw_features; |
|
bond_dev->features |= NETIF_F_HW_VLAN_CTAG_TX | NETIF_F_HW_VLAN_STAG_TX; |
|
#ifdef CONFIG_XFRM_OFFLOAD |
|
/* Disable XFRM features if this isn't an active-backup config */ |
|
if (BOND_MODE(bond) != BOND_MODE_ACTIVEBACKUP) |
|
bond_dev->features &= ~BOND_XFRM_FEATURES; |
|
#endif /* CONFIG_XFRM_OFFLOAD */ |
|
} |
|
|
|
/* 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 bond_up_slave *usable, *all; |
|
struct list_head *iter; |
|
struct slave *slave; |
|
|
|
bond_netpoll_cleanup(bond_dev); |
|
|
|
/* Release the bonded slaves */ |
|
bond_for_each_slave(bond, slave, iter) |
|
__bond_release_one(bond_dev, slave->dev, true, true); |
|
netdev_info(bond_dev, "Released all slaves\n"); |
|
|
|
usable = rtnl_dereference(bond->usable_slaves); |
|
if (usable) { |
|
RCU_INIT_POINTER(bond->usable_slaves, NULL); |
|
kfree_rcu(usable, rcu); |
|
} |
|
|
|
all = rtnl_dereference(bond->all_slaves); |
|
if (all) { |
|
RCU_INIT_POINTER(bond->all_slaves, NULL); |
|
kfree_rcu(all, rcu); |
|
} |
|
|
|
list_del(&bond->bond_list); |
|
|
|
bond_debug_unregister(bond); |
|
} |
|
|
|
/*------------------------- Module initialization ---------------------------*/ |
|
|
|
static int bond_check_params(struct bond_params *params) |
|
{ |
|
int arp_validate_value, fail_over_mac_value, primary_reselect_value, i; |
|
struct bond_opt_value newval; |
|
const struct bond_opt_value *valptr; |
|
int arp_all_targets_value = 0; |
|
u16 ad_actor_sys_prio = 0; |
|
u16 ad_user_port_key = 0; |
|
__be32 arp_target[BOND_MAX_ARP_TARGETS] = { 0 }; |
|
int arp_ip_count; |
|
int bond_mode = BOND_MODE_ROUNDROBIN; |
|
int xmit_hashtype = BOND_XMIT_POLICY_LAYER2; |
|
int lacp_fast = 0; |
|
int tlb_dynamic_lb; |
|
|
|
/* Convert string parameters. */ |
|
if (mode) { |
|
bond_opt_initstr(&newval, mode); |
|
valptr = bond_opt_parse(bond_opt_get(BOND_OPT_MODE), &newval); |
|
if (!valptr) { |
|
pr_err("Error: Invalid bonding mode \"%s\"\n", mode); |
|
return -EINVAL; |
|
} |
|
bond_mode = valptr->value; |
|
} |
|
|
|
if (xmit_hash_policy) { |
|
if (bond_mode == BOND_MODE_ROUNDROBIN || |
|
bond_mode == BOND_MODE_ACTIVEBACKUP || |
|
bond_mode == BOND_MODE_BROADCAST) { |
|
pr_info("xmit_hash_policy param is irrelevant in mode %s\n", |
|
bond_mode_name(bond_mode)); |
|
} else { |
|
bond_opt_initstr(&newval, xmit_hash_policy); |
|
valptr = bond_opt_parse(bond_opt_get(BOND_OPT_XMIT_HASH), |
|
&newval); |
|
if (!valptr) { |
|
pr_err("Error: Invalid xmit_hash_policy \"%s\"\n", |
|
xmit_hash_policy); |
|
return -EINVAL; |
|
} |
|
xmit_hashtype = valptr->value; |
|
} |
|
} |
|
|
|
if (lacp_rate) { |
|
if (bond_mode != BOND_MODE_8023AD) { |
|
pr_info("lacp_rate param is irrelevant in mode %s\n", |
|
bond_mode_name(bond_mode)); |
|
} else { |
|
bond_opt_initstr(&newval, lacp_rate); |
|
valptr = bond_opt_parse(bond_opt_get(BOND_OPT_LACP_RATE), |
|
&newval); |
|
if (!valptr) { |
|
pr_err("Error: Invalid lacp rate \"%s\"\n", |
|
lacp_rate); |
|
return -EINVAL; |
|
} |
|
lacp_fast = valptr->value; |
|
} |
|
} |
|
|
|
if (ad_select) { |
|
bond_opt_initstr(&newval, ad_select); |
|
valptr = bond_opt_parse(bond_opt_get(BOND_OPT_AD_SELECT), |
|
&newval); |
|
if (!valptr) { |
|
pr_err("Error: Invalid ad_select \"%s\"\n", ad_select); |
|
return -EINVAL; |
|
} |
|
params->ad_select = valptr->value; |
|
if (bond_mode != BOND_MODE_8023AD) |
|
pr_warn("ad_select param only affects 802.3ad mode\n"); |
|
} else { |
|
params->ad_select = BOND_AD_STABLE; |
|
} |
|
|
|
if (max_bonds < 0) { |
|
pr_warn("Warning: max_bonds (%d) not in range %d-%d, so it was reset to BOND_DEFAULT_MAX_BONDS (%d)\n", |
|
max_bonds, 0, INT_MAX, BOND_DEFAULT_MAX_BONDS); |
|
max_bonds = BOND_DEFAULT_MAX_BONDS; |
|
} |
|
|
|
if (miimon < 0) { |
|
pr_warn("Warning: miimon module parameter (%d), not in range 0-%d, so it was reset to 0\n", |
|
miimon, INT_MAX); |
|
miimon = 0; |
|
} |
|
|
|
if (updelay < 0) { |
|
pr_warn("Warning: updelay module parameter (%d), not in range 0-%d, so it was reset to 0\n", |
|
updelay, INT_MAX); |
|
updelay = 0; |
|
} |
|
|
|
if (downdelay < 0) { |
|
pr_warn("Warning: downdelay module parameter (%d), not in range 0-%d, so it was reset to 0\n", |
|
downdelay, INT_MAX); |
|
downdelay = 0; |
|
} |
|
|
|
if ((use_carrier != 0) && (use_carrier != 1)) { |
|
pr_warn("Warning: use_carrier module parameter (%d), not of valid value (0/1), so it was set to 1\n", |
|
use_carrier); |
|
use_carrier = 1; |
|
} |
|
|
|
if (num_peer_notif < 0 || num_peer_notif > 255) { |
|
pr_warn("Warning: num_grat_arp/num_unsol_na (%d) not in range 0-255 so it was reset to 1\n", |
|
num_peer_notif); |
|
num_peer_notif = 1; |
|
} |
|
|
|
/* reset values for 802.3ad/TLB/ALB */ |
|
if (!bond_mode_uses_arp(bond_mode)) { |
|
if (!miimon) { |
|
pr_warn("Warning: miimon must be specified, otherwise bonding will not detect link failure, speed and duplex which are essential for 802.3ad operation\n"); |
|
pr_warn("Forcing miimon to 100msec\n"); |
|
miimon = BOND_DEFAULT_MIIMON; |
|
} |
|
} |
|
|
|
if (tx_queues < 1 || tx_queues > 255) { |
|
pr_warn("Warning: tx_queues (%d) should be between 1 and 255, resetting to %d\n", |
|
tx_queues, BOND_DEFAULT_TX_QUEUES); |
|
tx_queues = BOND_DEFAULT_TX_QUEUES; |
|
} |
|
|
|
if ((all_slaves_active != 0) && (all_slaves_active != 1)) { |
|
pr_warn("Warning: all_slaves_active module parameter (%d), not of valid value (0/1), so it was set to 0\n", |
|
all_slaves_active); |
|
all_slaves_active = 0; |
|
} |
|
|
|
if (resend_igmp < 0 || resend_igmp > 255) { |
|
pr_warn("Warning: resend_igmp (%d) should be between 0 and 255, resetting to %d\n", |
|
resend_igmp, BOND_DEFAULT_RESEND_IGMP); |
|
resend_igmp = BOND_DEFAULT_RESEND_IGMP; |
|
} |
|
|
|
bond_opt_initval(&newval, packets_per_slave); |
|
if (!bond_opt_parse(bond_opt_get(BOND_OPT_PACKETS_PER_SLAVE), &newval)) { |
|
pr_warn("Warning: packets_per_slave (%d) should be between 0 and %u resetting to 1\n", |
|
packets_per_slave, USHRT_MAX); |
|
packets_per_slave = 1; |
|
} |
|
|
|
if (bond_mode == BOND_MODE_ALB) { |
|
pr_notice("In ALB mode you might experience client disconnections upon reconnection of a link if the bonding module updelay parameter (%d msec) is incompatible with the forwarding delay time of the switch\n", |
|
updelay); |
|
} |
|
|
|
if (!miimon) { |
|
if (updelay || downdelay) { |
|
/* just warn the user the up/down delay will have |
|
* no effect since miimon is zero... |
|
*/ |
|
pr_warn("Warning: miimon module parameter not set and updelay (%d) or downdelay (%d) module parameter is set; updelay and downdelay have no effect unless miimon is set\n", |
|
updelay, downdelay); |
|
} |
|
} else { |
|
/* don't allow arp monitoring */ |
|
if (arp_interval) { |
|
pr_warn("Warning: miimon (%d) and arp_interval (%d) can't be used simultaneously, disabling ARP monitoring\n", |
|
miimon, arp_interval); |
|
arp_interval = 0; |
|
} |
|
|
|
if ((updelay % miimon) != 0) { |
|
pr_warn("Warning: updelay (%d) is not a multiple of miimon (%d), updelay rounded to %d ms\n", |
|
updelay, miimon, (updelay / miimon) * miimon); |
|
} |
|
|
|
updelay /= miimon; |
|
|
|
if ((downdelay % miimon) != 0) { |
|
pr_warn("Warning: downdelay (%d) is not a multiple of miimon (%d), downdelay rounded to %d ms\n", |
|
downdelay, miimon, |
|
(downdelay / miimon) * miimon); |
|
} |
|
|
|
downdelay /= miimon; |
|
} |
|
|
|
if (arp_interval < 0) { |
|
pr_warn("Warning: arp_interval module parameter (%d), not in range 0-%d, so it was reset to 0\n", |
|
arp_interval, INT_MAX); |
|
arp_interval = 0; |
|
} |
|
|
|
for (arp_ip_count = 0, i = 0; |
|
(arp_ip_count < BOND_MAX_ARP_TARGETS) && arp_ip_target[i]; i++) { |
|
__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", |
|
arp_ip_target[i]); |
|
arp_interval = 0; |
|
} else { |
|
if (bond_get_targets_ip(arp_target, ip) == -1) |
|
arp_target[arp_ip_count++] = ip; |
|
else |
|
pr_warn("Warning: duplicate address %pI4 in arp_ip_target, skipping\n", |
|
&ip); |
|
} |
|
} |
|
|
|
if (arp_interval && !arp_ip_count) { |
|
/* don't allow arping if no arp_ip_target given... */ |
|
pr_warn("Warning: arp_interval module parameter (%d) specified without providing an arp_ip_target parameter, arp_interval was reset to 0\n", |
|
arp_interval); |
|
arp_interval = 0; |
|
} |
|
|
|
if (arp_validate) { |
|
if (!arp_interval) { |
|
pr_err("arp_validate requires arp_interval\n"); |
|
return -EINVAL; |
|
} |
|
|
|
bond_opt_initstr(&newval, arp_validate); |
|
valptr = bond_opt_parse(bond_opt_get(BOND_OPT_ARP_VALIDATE), |
|
&newval); |
|
if (!valptr) { |
|
pr_err("Error: invalid arp_validate \"%s\"\n", |
|
arp_validate); |
|
return -EINVAL; |
|
} |
|
arp_validate_value = valptr->value; |
|
} else { |
|
arp_validate_value = 0; |
|
} |
|
|
|
if (arp_all_targets) { |
|
bond_opt_initstr(&newval, arp_all_targets); |
|
valptr = bond_opt_parse(bond_opt_get(BOND_OPT_ARP_ALL_TARGETS), |
|
&newval); |
|
if (!valptr) { |
|
pr_err("Error: invalid arp_all_targets_value \"%s\"\n", |
|
arp_all_targets); |
|
arp_all_targets_value = 0; |
|
} else { |
|
arp_all_targets_value = valptr->value; |
|
} |
|
} |
|
|
|
if (miimon) { |
|
pr_info("MII link monitoring set to %d ms\n", miimon); |
|
} else if (arp_interval) { |
|
valptr = bond_opt_get_val(BOND_OPT_ARP_VALIDATE, |
|
arp_validate_value); |
|
pr_info("ARP monitoring set to %d ms, validate %s, with %d target(s):", |
|
arp_interval, valptr->string, arp_ip_count); |
|
|
|
for (i = 0; i < arp_ip_count; i++) |
|
pr_cont(" %s", arp_ip_target[i]); |
|
|
|
pr_cont("\n"); |
|
|
|
} else if (max_bonds) { |
|
/* miimon and arp_interval not set, we need one so things |
|
* work as expected, see bonding.txt for details |
|
*/ |
|
pr_debug("Warning: either miimon or arp_interval and arp_ip_target module parameters must be specified, otherwise bonding will not detect link failures! see bonding.txt for details\n"); |
|
} |
|
|
|
if (primary && !bond_mode_uses_primary(bond_mode)) { |
|
/* currently, using a primary only makes sense |
|
* in active backup, TLB or ALB modes |
|
*/ |
|
pr_warn("Warning: %s primary device specified but has no effect in %s mode\n", |
|
primary, bond_mode_name(bond_mode)); |
|
primary = NULL; |
|
} |
|
|
|
if (primary && primary_reselect) { |
|
bond_opt_initstr(&newval, primary_reselect); |
|
valptr = bond_opt_parse(bond_opt_get(BOND_OPT_PRIMARY_RESELECT), |
|
&newval); |
|
if (!valptr) { |
|
pr_err("Error: Invalid primary_reselect \"%s\"\n", |
|
primary_reselect); |
|
return -EINVAL; |
|
} |
|
primary_reselect_value = valptr->value; |
|
} else { |
|
primary_reselect_value = BOND_PRI_RESELECT_ALWAYS; |
|
} |
|
|
|
if (fail_over_mac) { |
|
bond_opt_initstr(&newval, fail_over_mac); |
|
valptr = bond_opt_parse(bond_opt_get(BOND_OPT_FAIL_OVER_MAC), |
|
&newval); |
|
if (!valptr) { |
|
pr_err("Error: invalid fail_over_mac \"%s\"\n", |
|
fail_over_mac); |
|
return -EINVAL; |
|
} |
|
fail_over_mac_value = valptr->value; |
|
if (bond_mode != BOND_MODE_ACTIVEBACKUP) |
|
pr_warn("Warning: fail_over_mac only affects active-backup mode\n"); |
|
} else { |
|
fail_over_mac_value = BOND_FOM_NONE; |
|
} |
|
|
|
bond_opt_initstr(&newval, "default"); |
|
valptr = bond_opt_parse( |
|
bond_opt_get(BOND_OPT_AD_ACTOR_SYS_PRIO), |
|
&newval); |
|
if (!valptr) { |
|
pr_err("Error: No ad_actor_sys_prio default value"); |
|
return -EINVAL; |
|
} |
|
ad_actor_sys_prio = valptr->value; |
|
|
|
valptr = bond_opt_parse(bond_opt_get(BOND_OPT_AD_USER_PORT_KEY), |
|
&newval); |
|
if (!valptr) { |
|
pr_err("Error: No ad_user_port_key default value"); |
|
return -EINVAL; |
|
} |
|
ad_user_port_key = valptr->value; |
|
|
|
bond_opt_initstr(&newval, "default"); |
|
valptr = bond_opt_parse(bond_opt_get(BOND_OPT_TLB_DYNAMIC_LB), &newval); |
|
if (!valptr) { |
|
pr_err("Error: No tlb_dynamic_lb default value"); |
|
return -EINVAL; |
|
} |
|
tlb_dynamic_lb = valptr->value; |
|
|
|
if (lp_interval == 0) { |
|
pr_warn("Warning: ip_interval must be between 1 and %d, so it was reset to %d\n", |
|
INT_MAX, BOND_ALB_DEFAULT_LP_INTERVAL); |
|
lp_interval = BOND_ALB_DEFAULT_LP_INTERVAL; |
|
} |
|
|
|
/* fill params struct with the proper values */ |
|
params->mode = bond_mode; |
|
params->xmit_policy = xmit_hashtype; |
|
params->miimon = miimon; |
|
params->num_peer_notif = num_peer_notif; |
|
params->arp_interval = arp_interval; |
|
params->arp_validate = arp_validate_value; |
|
params->arp_all_targets = arp_all_targets_value; |
|
params->updelay = updelay; |
|
params->downdelay = downdelay; |
|
params->peer_notif_delay = 0; |
|
params->use_carrier = use_carrier; |
|
params->lacp_fast = lacp_fast; |
|
params->primary[0] = 0; |
|
params->primary_reselect = primary_reselect_value; |
|
params->fail_over_mac = fail_over_mac_value; |
|
params->tx_queues = tx_queues; |
|
params->all_slaves_active = all_slaves_active; |
|
params->resend_igmp = resend_igmp; |
|
params->min_links = min_links; |
|
params->lp_interval = lp_interval; |
|
params->packets_per_slave = packets_per_slave; |
|
params->tlb_dynamic_lb = tlb_dynamic_lb; |
|
params->ad_actor_sys_prio = ad_actor_sys_prio; |
|
eth_zero_addr(params->ad_actor_system); |
|
params->ad_user_port_key = ad_user_port_key; |
|
if (packets_per_slave > 0) { |
|
params->reciprocal_packets_per_slave = |
|
reciprocal_value(packets_per_slave); |
|
} else { |
|
/* reciprocal_packets_per_slave is unused if |
|
* packets_per_slave is 0 or 1, just initialize it |
|
*/ |
|
params->reciprocal_packets_per_slave = |
|
(struct reciprocal_value) { 0 }; |
|
} |
|
|
|
if (primary) { |
|
strncpy(params->primary, primary, IFNAMSIZ); |
|
params->primary[IFNAMSIZ - 1] = 0; |
|
} |
|
|
|
memcpy(params->arp_targets, arp_target, sizeof(arp_target)); |
|
|
|
return 0; |
|
} |
|
|
|
/* 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); |
|
|
|
netdev_dbg(bond_dev, "Begin bond_init\n"); |
|
|
|
bond->wq = alloc_ordered_workqueue(bond_dev->name, WQ_MEM_RECLAIM); |
|
if (!bond->wq) |
|
return -ENOMEM; |
|
|
|
spin_lock_init(&bond->stats_lock); |
|
netdev_lockdep_set_classes(bond_dev); |
|
|
|
list_add_tail(&bond->bond_list, &bn->dev_list); |
|
|
|
bond_prepare_sysfs_group(bond); |
|
|
|
bond_debug_register(bond); |
|
|
|
/* Ensure valid dev_addr */ |
|
if (is_zero_ether_addr(bond_dev->dev_addr) && |
|
bond_dev->addr_assign_type == NET_ADDR_PERM) |
|
eth_hw_addr_random(bond_dev); |
|
|
|
return 0; |
|
} |
|
|
|
unsigned int bond_get_num_tx_queues(void) |
|
{ |
|
return tx_queues; |
|
} |
|
|
|
/* Create a new bond based on the specified name and bonding parameters. |
|
* If name is NULL, obtain a suitable "bond%d" name for us. |
|
* Caller must NOT hold rtnl_lock; we need to release it here before we |
|
* set up our sysfs entries. |
|
*/ |
|
int bond_create(struct net *net, const char *name) |
|
{ |
|
struct net_device *bond_dev; |
|
struct bonding *bond; |
|
struct alb_bond_info *bond_info; |
|
int res; |
|
|
|
rtnl_lock(); |
|
|
|
bond_dev = alloc_netdev_mq(sizeof(struct bonding), |
|
name ? name : "bond%d", NET_NAME_UNKNOWN, |
|
bond_setup, tx_queues); |
|
if (!bond_dev) { |
|
pr_err("%s: eek! can't alloc netdev!\n", name); |
|
rtnl_unlock(); |
|
return -ENOMEM; |
|
} |
|
|
|
/* |
|
* Initialize rx_hashtbl_used_head to RLB_NULL_INDEX. |
|
* It is set to 0 by default which is wrong. |
|
*/ |
|
bond = netdev_priv(bond_dev); |
|
bond_info = &(BOND_ALB_INFO(bond)); |
|
bond_info->rx_hashtbl_used_head = RLB_NULL_INDEX; |
|
|
|
dev_net_set(bond_dev, net); |
|
bond_dev->rtnl_link_ops = &bond_link_ops; |
|
|
|
res = register_netdevice(bond_dev); |
|
if (res < 0) { |
|
free_netdev(bond_dev); |
|
rtnl_unlock(); |
|
|
|
return res; |
|
} |
|
|
|
netif_carrier_off(bond_dev); |
|
|
|
bond_work_init_all(bond); |
|
|
|
rtnl_unlock(); |
|
return 0; |
|
} |
|
|
|
static int __net_init bond_net_init(struct net *net) |
|
{ |
|
struct bond_net *bn = net_generic(net, bond_net_id); |
|
|
|
bn->net = net; |
|
INIT_LIST_HEAD(&bn->dev_list); |
|
|
|
bond_create_proc_dir(bn); |
|
bond_create_sysfs(bn); |
|
|
|
return 0; |
|
} |
|
|
|
static void __net_exit bond_net_exit(struct net *net) |
|
{ |
|
struct bond_net *bn = net_generic(net, bond_net_id); |
|
struct bonding *bond, *tmp_bond; |
|
LIST_HEAD(list); |
|
|
|
bond_destroy_sysfs(bn); |
|
|
|
/* Kill off any bonds created after unregistering bond rtnl ops */ |
|
rtnl_lock(); |
|
list_for_each_entry_safe(bond, tmp_bond, &bn->dev_list, bond_list) |
|
unregister_netdevice_queue(bond->dev, &list); |
|
unregister_netdevice_many(&list); |
|
rtnl_unlock(); |
|
|
|
bond_destroy_proc_dir(bn); |
|
} |
|
|
|
static struct pernet_operations bond_net_ops = { |
|
.init = bond_net_init, |
|
.exit = bond_net_exit, |
|
.id = &bond_net_id, |
|
.size = sizeof(struct bond_net), |
|
}; |
|
|
|
static int __init bonding_init(void) |
|
{ |
|
int i; |
|
int res; |
|
|
|
res = bond_check_params(&bonding_defaults); |
|
if (res) |
|
goto out; |
|
|
|
res = register_pernet_subsys(&bond_net_ops); |
|
if (res) |
|
goto out; |
|
|
|
res = bond_netlink_init(); |
|
if (res) |
|
goto err_link; |
|
|
|
bond_create_debugfs(); |
|
|
|
for (i = 0; i < max_bonds; i++) { |
|
res = bond_create(&init_net, NULL); |
|
if (res) |
|
goto err; |
|
} |
|
|
|
skb_flow_dissector_init(&flow_keys_bonding, |
|
flow_keys_bonding_keys, |
|
ARRAY_SIZE(flow_keys_bonding_keys)); |
|
|
|
register_netdevice_notifier(&bond_netdev_notifier); |
|
out: |
|
return res; |
|
err: |
|
bond_destroy_debugfs(); |
|
bond_netlink_fini(); |
|
err_link: |
|
unregister_pernet_subsys(&bond_net_ops); |
|
goto out; |
|
|
|
} |
|
|
|
static void __exit bonding_exit(void) |
|
{ |
|
unregister_netdevice_notifier(&bond_netdev_notifier); |
|
|
|
bond_destroy_debugfs(); |
|
|
|
bond_netlink_fini(); |
|
unregister_pernet_subsys(&bond_net_ops); |
|
|
|
#ifdef CONFIG_NET_POLL_CONTROLLER |
|
/* Make sure we don't have an imbalance on our netpoll blocking */ |
|
WARN_ON(atomic_read(&netpoll_block_tx)); |
|
#endif |
|
} |
|
|
|
module_init(bonding_init); |
|
module_exit(bonding_exit); |
|
MODULE_LICENSE("GPL"); |
|
MODULE_DESCRIPTION(DRV_DESCRIPTION); |
|
MODULE_AUTHOR("Thomas Davis, [email protected] and many others");
|
|
|