forked from Minki/linux
fb9eb899a6
When link transitions from LINK_FAIL to LINK_UP, the commit phase is not called. This leads to an erroneous state causing slave-link state to get stuck in "going down" state while its speed and duplex are perfectly fine. This issue is a side-effect of splitting link-set into propose and commit phases introduced byde77ecd4ef("bonding: improve link-status update in mii-monitoring") This patch fixes these issues by calling commit phase whenever link state change is proposed. Fixes:de77ecd4ef("bonding: improve link-status update in mii-monitoring") Signed-off-by: Mahesh Bandewar <maheshb@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
4832 lines
133 KiB
C
4832 lines
133 KiB
C
/*
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* originally based on the dummy device.
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*
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* Copyright 1999, Thomas Davis, tadavis@lbl.gov.
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* Licensed under the GPL. Based on dummy.c, and eql.c devices.
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*
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* bonding.c: an Ethernet Bonding driver
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*
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* This is useful to talk to a Cisco EtherChannel compatible equipment:
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* Cisco 5500
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* Sun Trunking (Solaris)
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* Alteon AceDirector Trunks
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* Linux Bonding
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* and probably many L2 switches ...
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*
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* How it works:
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* ifconfig bond0 ipaddress netmask up
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* will setup a network device, with an ip address. No mac address
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* will be assigned at this time. The hw mac address will come from
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* the first slave bonded to the channel. All slaves will then use
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* this hw mac address.
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*
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* ifconfig bond0 down
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* will release all slaves, marking them as down.
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*
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* ifenslave bond0 eth0
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* will attach eth0 to bond0 as a slave. eth0 hw mac address will either
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* a: be used as initial mac address
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* b: if a hw mac address already is there, eth0's hw mac address
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* will then be set from bond0.
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*
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*/
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/types.h>
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#include <linux/fcntl.h>
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#include <linux/interrupt.h>
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#include <linux/ptrace.h>
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#include <linux/ioport.h>
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#include <linux/in.h>
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#include <net/ip.h>
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#include <linux/ip.h>
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#include <linux/tcp.h>
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#include <linux/udp.h>
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#include <linux/slab.h>
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#include <linux/string.h>
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#include <linux/init.h>
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#include <linux/timer.h>
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#include <linux/socket.h>
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#include <linux/ctype.h>
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#include <linux/inet.h>
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#include <linux/bitops.h>
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#include <linux/io.h>
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#include <asm/dma.h>
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#include <linux/uaccess.h>
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#include <linux/errno.h>
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#include <linux/netdevice.h>
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#include <linux/inetdevice.h>
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#include <linux/igmp.h>
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#include <linux/etherdevice.h>
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#include <linux/skbuff.h>
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#include <net/sock.h>
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#include <linux/rtnetlink.h>
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#include <linux/smp.h>
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#include <linux/if_ether.h>
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#include <net/arp.h>
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#include <linux/mii.h>
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#include <linux/ethtool.h>
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#include <linux/if_vlan.h>
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#include <linux/if_bonding.h>
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#include <linux/jiffies.h>
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#include <linux/preempt.h>
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#include <net/route.h>
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#include <net/net_namespace.h>
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#include <net/netns/generic.h>
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#include <net/pkt_sched.h>
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#include <linux/rculist.h>
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#include <net/flow_dissector.h>
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#include <net/switchdev.h>
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#include <net/bonding.h>
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#include <net/bond_3ad.h>
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#include <net/bond_alb.h>
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#include "bonding_priv.h"
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/*---------------------------- Module parameters ----------------------------*/
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/* monitor all links that often (in milliseconds). <=0 disables monitoring */
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static int max_bonds = BOND_DEFAULT_MAX_BONDS;
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static int tx_queues = BOND_DEFAULT_TX_QUEUES;
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static int num_peer_notif = 1;
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static int miimon;
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static int updelay;
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static int downdelay;
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static int use_carrier = 1;
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static char *mode;
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static char *primary;
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static char *primary_reselect;
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static char *lacp_rate;
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static int min_links;
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static char *ad_select;
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static char *xmit_hash_policy;
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static int arp_interval;
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static char *arp_ip_target[BOND_MAX_ARP_TARGETS];
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static char *arp_validate;
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static char *arp_all_targets;
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static char *fail_over_mac;
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static int all_slaves_active;
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static struct bond_params bonding_defaults;
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static int resend_igmp = BOND_DEFAULT_RESEND_IGMP;
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static int packets_per_slave = 1;
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static int lp_interval = BOND_ALB_DEFAULT_LP_INTERVAL;
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module_param(max_bonds, int, 0);
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MODULE_PARM_DESC(max_bonds, "Max number of bonded devices");
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module_param(tx_queues, int, 0);
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MODULE_PARM_DESC(tx_queues, "Max number of transmit queues (default = 16)");
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module_param_named(num_grat_arp, num_peer_notif, int, 0644);
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MODULE_PARM_DESC(num_grat_arp, "Number of peer notifications to send on "
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"failover event (alias of num_unsol_na)");
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module_param_named(num_unsol_na, num_peer_notif, int, 0644);
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MODULE_PARM_DESC(num_unsol_na, "Number of peer notifications to send on "
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"failover event (alias of num_grat_arp)");
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module_param(miimon, int, 0);
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MODULE_PARM_DESC(miimon, "Link check interval in milliseconds");
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module_param(updelay, int, 0);
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MODULE_PARM_DESC(updelay, "Delay before considering link up, in milliseconds");
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module_param(downdelay, int, 0);
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MODULE_PARM_DESC(downdelay, "Delay before considering link down, "
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"in milliseconds");
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module_param(use_carrier, int, 0);
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MODULE_PARM_DESC(use_carrier, "Use netif_carrier_ok (vs MII ioctls) in miimon; "
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"0 for off, 1 for on (default)");
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module_param(mode, charp, 0);
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MODULE_PARM_DESC(mode, "Mode of operation; 0 for balance-rr, "
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"1 for active-backup, 2 for balance-xor, "
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"3 for broadcast, 4 for 802.3ad, 5 for balance-tlb, "
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"6 for balance-alb");
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module_param(primary, charp, 0);
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MODULE_PARM_DESC(primary, "Primary network device to use");
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module_param(primary_reselect, charp, 0);
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MODULE_PARM_DESC(primary_reselect, "Reselect primary slave "
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"once it comes up; "
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"0 for always (default), "
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"1 for only if speed of primary is "
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"better, "
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"2 for only on active slave "
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"failure");
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module_param(lacp_rate, charp, 0);
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MODULE_PARM_DESC(lacp_rate, "LACPDU tx rate to request from 802.3ad partner; "
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"0 for slow, 1 for fast");
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module_param(ad_select, charp, 0);
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MODULE_PARM_DESC(ad_select, "802.3ad aggregation selection logic; "
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"0 for stable (default), 1 for bandwidth, "
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"2 for count");
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module_param(min_links, int, 0);
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MODULE_PARM_DESC(min_links, "Minimum number of available links before turning on carrier");
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module_param(xmit_hash_policy, charp, 0);
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MODULE_PARM_DESC(xmit_hash_policy, "balance-xor and 802.3ad hashing method; "
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"0 for layer 2 (default), 1 for layer 3+4, "
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"2 for layer 2+3, 3 for encap layer 2+3, "
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"4 for encap layer 3+4");
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module_param(arp_interval, int, 0);
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MODULE_PARM_DESC(arp_interval, "arp interval in milliseconds");
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module_param_array(arp_ip_target, charp, NULL, 0);
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MODULE_PARM_DESC(arp_ip_target, "arp targets in n.n.n.n form");
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module_param(arp_validate, charp, 0);
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MODULE_PARM_DESC(arp_validate, "validate src/dst of ARP probes; "
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"0 for none (default), 1 for active, "
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"2 for backup, 3 for all");
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module_param(arp_all_targets, charp, 0);
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MODULE_PARM_DESC(arp_all_targets, "fail on any/all arp targets timeout; 0 for any (default), 1 for all");
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module_param(fail_over_mac, charp, 0);
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MODULE_PARM_DESC(fail_over_mac, "For active-backup, do not set all slaves to "
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"the same MAC; 0 for none (default), "
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"1 for active, 2 for follow");
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module_param(all_slaves_active, int, 0);
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MODULE_PARM_DESC(all_slaves_active, "Keep all frames received on an interface "
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"by setting active flag for all slaves; "
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"0 for never (default), 1 for always.");
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module_param(resend_igmp, int, 0);
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MODULE_PARM_DESC(resend_igmp, "Number of IGMP membership reports to send on "
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"link failure");
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module_param(packets_per_slave, int, 0);
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MODULE_PARM_DESC(packets_per_slave, "Packets to send per slave in balance-rr "
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"mode; 0 for a random slave, 1 packet per "
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"slave (default), >1 packets per slave.");
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module_param(lp_interval, uint, 0);
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MODULE_PARM_DESC(lp_interval, "The number of seconds between instances where "
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"the bonding driver sends learning packets to "
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"each slaves peer switch. The default is 1.");
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/*----------------------------- Global variables ----------------------------*/
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#ifdef CONFIG_NET_POLL_CONTROLLER
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atomic_t netpoll_block_tx = ATOMIC_INIT(0);
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#endif
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unsigned int bond_net_id __read_mostly;
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/*-------------------------- Forward declarations ---------------------------*/
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static int bond_init(struct net_device *bond_dev);
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static void bond_uninit(struct net_device *bond_dev);
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static void bond_get_stats(struct net_device *bond_dev,
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struct rtnl_link_stats64 *stats);
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static void bond_slave_arr_handler(struct work_struct *work);
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static bool bond_time_in_interval(struct bonding *bond, unsigned long last_act,
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int mod);
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/*---------------------------- General routines -----------------------------*/
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const char *bond_mode_name(int mode)
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{
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static const char *names[] = {
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[BOND_MODE_ROUNDROBIN] = "load balancing (round-robin)",
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[BOND_MODE_ACTIVEBACKUP] = "fault-tolerance (active-backup)",
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[BOND_MODE_XOR] = "load balancing (xor)",
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[BOND_MODE_BROADCAST] = "fault-tolerance (broadcast)",
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[BOND_MODE_8023AD] = "IEEE 802.3ad Dynamic link aggregation",
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[BOND_MODE_TLB] = "transmit load balancing",
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[BOND_MODE_ALB] = "adaptive load balancing",
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};
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if (mode < BOND_MODE_ROUNDROBIN || mode > BOND_MODE_ALB)
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return "unknown";
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return names[mode];
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}
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/*---------------------------------- VLAN -----------------------------------*/
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/**
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* bond_dev_queue_xmit - Prepare skb for xmit.
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*
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* @bond: bond device that got this skb for tx.
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* @skb: hw accel VLAN tagged skb to transmit
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* @slave_dev: slave that is supposed to xmit this skbuff
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*/
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void bond_dev_queue_xmit(struct bonding *bond, struct sk_buff *skb,
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struct net_device *slave_dev)
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{
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skb->dev = slave_dev;
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BUILD_BUG_ON(sizeof(skb->queue_mapping) !=
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sizeof(qdisc_skb_cb(skb)->slave_dev_queue_mapping));
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skb->queue_mapping = qdisc_skb_cb(skb)->slave_dev_queue_mapping;
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if (unlikely(netpoll_tx_running(bond->dev)))
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bond_netpoll_send_skb(bond_get_slave_by_dev(bond, slave_dev), skb);
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else
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dev_queue_xmit(skb);
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}
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/* In the following 2 functions, bond_vlan_rx_add_vid and bond_vlan_rx_kill_vid,
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* We don't protect the slave list iteration with a lock because:
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* a. This operation is performed in IOCTL context,
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* b. The operation is protected by the RTNL semaphore in the 8021q code,
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* c. Holding a lock with BH disabled while directly calling a base driver
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* entry point is generally a BAD idea.
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*
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* The design of synchronization/protection for this operation in the 8021q
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* module is good for one or more VLAN devices over a single physical device
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* and cannot be extended for a teaming solution like bonding, so there is a
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* potential race condition here where a net device from the vlan group might
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* be referenced (either by a base driver or the 8021q code) while it is being
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* removed from the system. However, it turns out we're not making matters
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* worse, and if it works for regular VLAN usage it will work here too.
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*/
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/**
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* bond_vlan_rx_add_vid - Propagates adding an id to slaves
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* @bond_dev: bonding net device that got called
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* @vid: vlan id being added
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*/
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static int bond_vlan_rx_add_vid(struct net_device *bond_dev,
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__be16 proto, u16 vid)
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{
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struct bonding *bond = netdev_priv(bond_dev);
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struct slave *slave, *rollback_slave;
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struct list_head *iter;
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int res;
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bond_for_each_slave(bond, slave, iter) {
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res = vlan_vid_add(slave->dev, proto, vid);
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if (res)
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goto unwind;
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}
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return 0;
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unwind:
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/* unwind to the slave that failed */
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bond_for_each_slave(bond, rollback_slave, iter) {
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if (rollback_slave == slave)
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break;
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vlan_vid_del(rollback_slave->dev, proto, vid);
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}
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return res;
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}
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/**
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* bond_vlan_rx_kill_vid - Propagates deleting an id to slaves
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* @bond_dev: bonding net device that got called
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* @vid: vlan id being removed
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*/
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static int bond_vlan_rx_kill_vid(struct net_device *bond_dev,
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__be16 proto, u16 vid)
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{
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struct bonding *bond = netdev_priv(bond_dev);
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struct list_head *iter;
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struct slave *slave;
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bond_for_each_slave(bond, slave, iter)
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vlan_vid_del(slave->dev, proto, vid);
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if (bond_is_lb(bond))
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bond_alb_clear_vlan(bond, vid);
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return 0;
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}
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/*------------------------------- Link status -------------------------------*/
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/* Set the carrier state for the master according to the state of its
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* slaves. If any slaves are up, the master is up. In 802.3ad mode,
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* do special 802.3ad magic.
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*
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* Returns zero if carrier state does not change, nonzero if it does.
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*/
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int bond_set_carrier(struct bonding *bond)
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{
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struct list_head *iter;
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struct slave *slave;
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if (!bond_has_slaves(bond))
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goto down;
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if (BOND_MODE(bond) == BOND_MODE_8023AD)
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return bond_3ad_set_carrier(bond);
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bond_for_each_slave(bond, slave, iter) {
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if (slave->link == BOND_LINK_UP) {
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if (!netif_carrier_ok(bond->dev)) {
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netif_carrier_on(bond->dev);
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return 1;
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}
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return 0;
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}
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}
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down:
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if (netif_carrier_ok(bond->dev)) {
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netif_carrier_off(bond->dev);
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return 1;
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}
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return 0;
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}
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/* Get link speed and duplex from the slave's base driver
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* using ethtool. If for some reason the call fails or the
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* values are invalid, set speed and duplex to -1,
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* and return. Return 1 if speed or duplex settings are
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* UNKNOWN; 0 otherwise.
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*/
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static int bond_update_speed_duplex(struct slave *slave)
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{
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struct net_device *slave_dev = slave->dev;
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struct ethtool_link_ksettings ecmd;
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int res;
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slave->speed = SPEED_UNKNOWN;
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slave->duplex = DUPLEX_UNKNOWN;
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res = __ethtool_get_link_ksettings(slave_dev, &ecmd);
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if (res < 0)
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return 1;
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if (ecmd.base.speed == 0 || ecmd.base.speed == ((__u32)-1))
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return 1;
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switch (ecmd.base.duplex) {
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case DUPLEX_FULL:
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case DUPLEX_HALF:
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break;
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default:
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return 1;
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}
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slave->speed = ecmd.base.speed;
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slave->duplex = ecmd.base.duplex;
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return 0;
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}
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const char *bond_slave_link_status(s8 link)
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{
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switch (link) {
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case BOND_LINK_UP:
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return "up";
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case BOND_LINK_FAIL:
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return "going down";
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case BOND_LINK_DOWN:
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return "down";
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case BOND_LINK_BACK:
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return "going back";
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default:
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return "unknown";
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}
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}
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/* if <dev> supports MII link status reporting, check its link status.
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*
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* We either do MII/ETHTOOL ioctls, or check netif_carrier_ok(),
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* depending upon the setting of the use_carrier parameter.
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*
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* Return either BMSR_LSTATUS, meaning that the link is up (or we
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* can't tell and just pretend it is), or 0, meaning that the link is
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* down.
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*
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* If reporting is non-zero, instead of faking link up, return -1 if
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* both ETHTOOL and MII ioctls fail (meaning the device does not
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* support them). If use_carrier is set, return whatever it says.
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* It'd be nice if there was a good way to tell if a driver supports
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* netif_carrier, but there really isn't.
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*/
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static int bond_check_dev_link(struct bonding *bond,
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struct net_device *slave_dev, int reporting)
|
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{
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const struct net_device_ops *slave_ops = slave_dev->netdev_ops;
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int (*ioctl)(struct net_device *, struct ifreq *, int);
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struct ifreq ifr;
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struct mii_ioctl_data *mii;
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if (!reporting && !netif_running(slave_dev))
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return 0;
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|
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if (bond->params.use_carrier)
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return netif_carrier_ok(slave_dev) ? BMSR_LSTATUS : 0;
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|
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/* Try to get link status using Ethtool first. */
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if (slave_dev->ethtool_ops->get_link)
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return slave_dev->ethtool_ops->get_link(slave_dev) ?
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BMSR_LSTATUS : 0;
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|
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/* Ethtool can't be used, fallback to MII ioctls. */
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ioctl = slave_ops->ndo_do_ioctl;
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if (ioctl) {
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/* TODO: set pointer to correct ioctl on a per team member
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* bases to make this more efficient. that is, once
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* we determine the correct ioctl, we will always
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* call it and not the others for that team
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* 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 void bond_set_dev_addr(struct net_device *bond_dev,
|
|
struct net_device *slave_dev)
|
|
{
|
|
netdev_dbg(bond_dev, "bond_dev=%p slave_dev=%p slave_dev->name=%s slave_dev->addr_len=%d\n",
|
|
bond_dev, slave_dev, slave_dev->name, slave_dev->addr_len);
|
|
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);
|
|
}
|
|
|
|
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)
|
|
bond_set_dev_addr(bond->dev, new_active->dev);
|
|
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);
|
|
if (rv) {
|
|
netdev_err(bond->dev, "Error %d setting MAC of slave %s\n",
|
|
-rv, new_active->dev->name);
|
|
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);
|
|
if (rv)
|
|
netdev_err(bond->dev, "Error %d setting MAC of slave %s\n",
|
|
-rv, new_active->dev->name);
|
|
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 ||
|
|
!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: 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;
|
|
|
|
if (new_active) {
|
|
new_active->last_link_up = jiffies;
|
|
|
|
if (new_active->link == BOND_LINK_BACK) {
|
|
if (bond_uses_primary(bond)) {
|
|
netdev_info(bond->dev, "making interface %s the new active one %d ms earlier\n",
|
|
new_active->dev->name,
|
|
(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)) {
|
|
netdev_info(bond->dev, "making interface %s the new active one\n",
|
|
new_active->dev->name);
|
|
}
|
|
}
|
|
}
|
|
|
|
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;
|
|
should_notify_peers =
|
|
bond_should_notify_peers(bond);
|
|
}
|
|
|
|
call_netdevice_notifiers(NETDEV_BONDING_FAILOVER, bond->dev);
|
|
if (should_notify_peers)
|
|
call_netdevice_notifiers(NETDEV_NOTIFY_PEERS,
|
|
bond->dev);
|
|
}
|
|
}
|
|
|
|
/* 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, "first 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_async(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;
|
|
struct netpoll_info *ni;
|
|
const struct net_device_ops *ops;
|
|
|
|
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) {
|
|
ops = slave->dev->netdev_ops;
|
|
if (!bond_slave_is_up(slave) || !ops->ndo_poll_controller)
|
|
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;
|
|
}
|
|
|
|
ni = rcu_dereference_bh(slave->dev->npinfo);
|
|
if (down_trylock(&ni->dev_lock))
|
|
continue;
|
|
ops->ndo_poll_controller(slave->dev);
|
|
up(&ni->dev_lock);
|
|
}
|
|
}
|
|
|
|
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)
|
|
|
|
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;
|
|
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;
|
|
|
|
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);
|
|
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);
|
|
}
|
|
|
|
done:
|
|
bond_dev->vlan_features = vlan_features;
|
|
bond_dev->hw_enc_features = enc_features | NETIF_F_GSO_ENCAP_ALL;
|
|
bond_dev->hard_header_len = max_hard_header_len;
|
|
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->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 = ACCESS_ONCE(bond->recv_probe);
|
|
if (recv_probe) {
|
|
ret = recv_probe(skb, bond, slave);
|
|
if (ret == RX_HANDLER_CONSUMED) {
|
|
consume_skb(skb);
|
|
return ret;
|
|
}
|
|
}
|
|
|
|
if (bond_should_deliver_exact_match(skb, slave, bond))
|
|
return RX_HANDLER_EXACT;
|
|
|
|
skb->dev = bond->dev;
|
|
|
|
if (BOND_MODE(bond) == BOND_MODE_ALB &&
|
|
bond->dev->priv_flags & IFF_BRIDGE_PORT &&
|
|
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 int bond_master_upper_dev_link(struct bonding *bond, struct slave *slave)
|
|
{
|
|
struct netdev_lag_upper_info lag_upper_info;
|
|
int err;
|
|
|
|
lag_upper_info.tx_type = bond_lag_tx_type(bond);
|
|
err = netdev_master_upper_dev_link(slave->dev, bond->dev, slave,
|
|
&lag_upper_info);
|
|
if (err)
|
|
return err;
|
|
rtmsg_ifinfo(RTM_NEWLINK, slave->dev, IFF_SLAVE, GFP_KERNEL);
|
|
return 0;
|
|
}
|
|
|
|
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;
|
|
rtmsg_ifinfo(RTM_NEWLINK, slave->dev, IFF_SLAVE, GFP_KERNEL);
|
|
}
|
|
|
|
static struct slave *bond_alloc_slave(struct bonding *bond)
|
|
{
|
|
struct slave *slave = NULL;
|
|
|
|
slave = kzalloc(sizeof(*slave), GFP_KERNEL);
|
|
if (!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)) {
|
|
kfree(slave);
|
|
return NULL;
|
|
}
|
|
}
|
|
return slave;
|
|
}
|
|
|
|
static void bond_free_slave(struct slave *slave)
|
|
{
|
|
struct bonding *bond = bond_get_bond_by_slave(slave);
|
|
|
|
if (BOND_MODE(bond) == BOND_MODE_8023AD)
|
|
kfree(SLAVE_AD_INFO(slave));
|
|
|
|
kfree(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(struct net_device *dev,
|
|
struct netdev_bonding_info *info)
|
|
{
|
|
rtnl_lock();
|
|
netdev_bonding_info_change(dev, info);
|
|
rtnl_unlock();
|
|
}
|
|
|
|
static void bond_netdev_notify_work(struct work_struct *_work)
|
|
{
|
|
struct netdev_notify_work *w =
|
|
container_of(_work, struct netdev_notify_work, work.work);
|
|
|
|
bond_netdev_notify(w->dev, &w->bonding_info);
|
|
dev_put(w->dev);
|
|
kfree(w);
|
|
}
|
|
|
|
void bond_queue_slave_event(struct slave *slave)
|
|
{
|
|
struct bonding *bond = slave->bond;
|
|
struct netdev_notify_work *nnw = kzalloc(sizeof(*nnw), GFP_ATOMIC);
|
|
|
|
if (!nnw)
|
|
return;
|
|
|
|
dev_hold(slave->dev);
|
|
nnw->dev = slave->dev;
|
|
bond_fill_ifslave(slave, &nnw->bonding_info.slave);
|
|
bond_fill_ifbond(bond, &nnw->bonding_info.master);
|
|
INIT_DELAYED_WORK(&nnw->work, bond_netdev_notify_work);
|
|
|
|
queue_delayed_work(slave->bond->wq, &nnw->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 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) {
|
|
netdev_warn(bond_dev, "no link monitoring support for %s\n",
|
|
slave_dev->name);
|
|
}
|
|
|
|
/* already in-use? */
|
|
if (netdev_is_rx_handler_busy(slave_dev)) {
|
|
netdev_err(bond_dev,
|
|
"Error: Device is in use and cannot be enslaved\n");
|
|
return -EBUSY;
|
|
}
|
|
|
|
if (bond_dev == slave_dev) {
|
|
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) {
|
|
netdev_dbg(bond_dev, "%s is NETIF_F_VLAN_CHALLENGED\n",
|
|
slave_dev->name);
|
|
if (vlan_uses_dev(bond_dev)) {
|
|
netdev_err(bond_dev, "Error: cannot enslave VLAN challenged slave %s on VLAN enabled bond %s\n",
|
|
slave_dev->name, bond_dev->name);
|
|
return -EPERM;
|
|
} else {
|
|
netdev_warn(bond_dev, "enslaved VLAN challenged slave %s. Adding VLANs will be blocked as long as %s is part of bond %s\n",
|
|
slave_dev->name, slave_dev->name,
|
|
bond_dev->name);
|
|
}
|
|
} else {
|
|
netdev_dbg(bond_dev, "%s is !NETIF_F_VLAN_CHALLENGED\n",
|
|
slave_dev->name);
|
|
}
|
|
|
|
/* 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) {
|
|
netdev_err(bond_dev, "%s is up - this may be due to an out of date ifenslave\n",
|
|
slave_dev->name);
|
|
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) {
|
|
netdev_dbg(bond_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) {
|
|
netdev_err(bond_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) {
|
|
netdev_err(bond_dev, "%s ether type (%d) is different from other slaves (%d), can not enslave it\n",
|
|
slave_dev->name, slave_dev->type, bond_dev->type);
|
|
return -EINVAL;
|
|
}
|
|
|
|
if (slave_dev->type == ARPHRD_INFINIBAND &&
|
|
BOND_MODE(bond) != BOND_MODE_ACTIVEBACKUP) {
|
|
netdev_warn(bond_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) {
|
|
netdev_warn(bond_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;
|
|
netdev_warn(bond_dev, "Setting fail_over_mac to active for active-backup mode\n");
|
|
} else {
|
|
netdev_err(bond_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)
|
|
bond_set_dev_addr(bond->dev, slave_dev);
|
|
|
|
new_slave = bond_alloc_slave(bond);
|
|
if (!new_slave) {
|
|
res = -ENOMEM;
|
|
goto err_undo_flags;
|
|
}
|
|
|
|
new_slave->bond = bond;
|
|
new_slave->dev = slave_dev;
|
|
/* 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) {
|
|
netdev_dbg(bond_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);
|
|
if (res) {
|
|
netdev_dbg(bond_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);
|
|
if (res) {
|
|
netdev_dbg(bond_dev, "Opening slave %s failed\n", slave_dev->name);
|
|
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;
|
|
}
|
|
|
|
/* 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_close;
|
|
}
|
|
|
|
/* set allmulti level to new slave */
|
|
if (bond_dev->flags & IFF_ALLMULTI) {
|
|
res = dev_set_allmulti(slave_dev, 1);
|
|
if (res)
|
|
goto err_close;
|
|
}
|
|
|
|
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);
|
|
}
|
|
|
|
res = vlan_vids_add_by_dev(slave_dev, bond_dev);
|
|
if (res) {
|
|
netdev_err(bond_dev, "Couldn't add bond vlan ids to %s\n",
|
|
slave_dev->name);
|
|
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))
|
|
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.
|
|
*/
|
|
netdev_warn(bond_dev, "MII and ETHTOOL support not available for interface %s, and arp_interval/arp_ip_target module parameters not specified, thus bonding will not detect link failures! see bonding.txt for details\n",
|
|
slave_dev->name);
|
|
} else if (link_reporting == -1) {
|
|
/* unable get link status using mii/ethtool */
|
|
netdev_warn(bond_dev, "can't get link status from interface %s; 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",
|
|
slave_dev->name);
|
|
}
|
|
}
|
|
|
|
/* 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;
|
|
netdev_dbg(bond_dev, "Initial state of slave_dev 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:
|
|
netdev_dbg(bond_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
|
|
slave_dev->npinfo = bond->dev->npinfo;
|
|
if (slave_dev->npinfo) {
|
|
if (slave_enable_netpoll(new_slave)) {
|
|
netdev_info(bond_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) {
|
|
netdev_dbg(bond_dev, "Error %d calling netdev_rx_handler_register\n", res);
|
|
goto err_detach;
|
|
}
|
|
|
|
res = bond_master_upper_dev_link(bond, new_slave);
|
|
if (res) {
|
|
netdev_dbg(bond_dev, "Error %d calling bond_master_upper_dev_link\n", res);
|
|
goto err_unregister;
|
|
}
|
|
|
|
res = bond_sysfs_slave_add(new_slave);
|
|
if (res) {
|
|
netdev_dbg(bond_dev, "Error %d calling bond_sysfs_slave_add\n", res);
|
|
goto err_upper_unlink;
|
|
}
|
|
|
|
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_uses_xmit_hash(bond))
|
|
bond_update_slave_arr(bond, NULL);
|
|
|
|
netdev_info(bond_dev, "Enslaving %s as %s interface with %s link\n",
|
|
slave_dev->name,
|
|
bond_is_active_slave(new_slave) ? "an active" : "a backup",
|
|
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_upper_unlink:
|
|
bond_upper_dev_unlink(bond, new_slave);
|
|
|
|
err_unregister:
|
|
netdev_rx_handler_unregister(slave_dev);
|
|
|
|
err_detach:
|
|
if (!bond_uses_primary(bond))
|
|
bond_hw_addr_flush(bond_dev, slave_dev);
|
|
|
|
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:
|
|
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);
|
|
}
|
|
|
|
err_restore_mtu:
|
|
dev_set_mtu(slave_dev, new_slave->original_mtu);
|
|
|
|
err_free:
|
|
bond_free_slave(new_slave);
|
|
|
|
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)
|
|
{
|
|
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)) {
|
|
netdev_dbg(bond_dev, "cannot release %s\n",
|
|
slave_dev->name);
|
|
return -EINVAL;
|
|
}
|
|
|
|
block_netpoll_tx();
|
|
|
|
slave = bond_get_slave_by_dev(bond, slave_dev);
|
|
if (!slave) {
|
|
/* not a slave of this bond */
|
|
netdev_info(bond_dev, "%s not enslaved\n",
|
|
slave_dev->name);
|
|
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_uses_xmit_hash(bond))
|
|
bond_update_slave_arr(bond, slave);
|
|
|
|
netdev_info(bond_dev, "Releasing %s interface %s\n",
|
|
bond_is_active_slave(slave) ? "active" : "backup",
|
|
slave_dev->name);
|
|
|
|
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))
|
|
netdev_warn(bond_dev, "the permanent HWaddr of %s - %pM - is still in use by %s - set the HWaddr of %s to a different address to avoid conflicts\n",
|
|
slave_dev->name, slave->perm_hwaddr,
|
|
bond_dev->name, slave_dev->name);
|
|
}
|
|
|
|
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))
|
|
netdev_info(bond_dev, "last VLAN challenged slave %s left bond %s - VLAN blocking is removed\n",
|
|
slave_dev->name, bond_dev->name);
|
|
|
|
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);
|
|
}
|
|
|
|
dev_set_mtu(slave_dev, slave->original_mtu);
|
|
|
|
slave_dev->priv_flags &= ~IFF_BONDING;
|
|
|
|
bond_free_slave(slave);
|
|
|
|
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);
|
|
}
|
|
|
|
/* 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(bond_dev, slave_dev);
|
|
if (ret == 0 && !bond_has_slaves(bond)) {
|
|
bond_dev->priv_flags |= IFF_DISABLE_NETPOLL;
|
|
netdev_info(bond_dev, "Destroying bond %s\n",
|
|
bond_dev->name);
|
|
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) {
|
|
slave->new_link = 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);
|
|
slave->delay = bond->params.downdelay;
|
|
if (slave->delay) {
|
|
netdev_info(bond->dev, "link status down for %sinterface %s, disabling it in %d ms\n",
|
|
(BOND_MODE(bond) ==
|
|
BOND_MODE_ACTIVEBACKUP) ?
|
|
(bond_is_active_slave(slave) ?
|
|
"active " : "backup ") : "",
|
|
slave->dev->name,
|
|
bond->params.downdelay * bond->params.miimon);
|
|
}
|
|
/*FALLTHRU*/
|
|
case BOND_LINK_FAIL:
|
|
if (link_state) {
|
|
/* recovered before downdelay expired */
|
|
bond_propose_link_state(slave, BOND_LINK_UP);
|
|
slave->last_link_up = jiffies;
|
|
netdev_info(bond->dev, "link status up again after %d ms for interface %s\n",
|
|
(bond->params.downdelay - slave->delay) *
|
|
bond->params.miimon,
|
|
slave->dev->name);
|
|
commit++;
|
|
continue;
|
|
}
|
|
|
|
if (slave->delay <= 0) {
|
|
slave->new_link = BOND_LINK_DOWN;
|
|
commit++;
|
|
continue;
|
|
}
|
|
|
|
slave->delay--;
|
|
break;
|
|
|
|
case BOND_LINK_DOWN:
|
|
if (!link_state)
|
|
continue;
|
|
|
|
bond_propose_link_state(slave, BOND_LINK_BACK);
|
|
slave->delay = bond->params.updelay;
|
|
|
|
if (slave->delay) {
|
|
netdev_info(bond->dev, "link status up for interface %s, enabling it in %d ms\n",
|
|
slave->dev->name,
|
|
ignore_updelay ? 0 :
|
|
bond->params.updelay *
|
|
bond->params.miimon);
|
|
}
|
|
/*FALLTHRU*/
|
|
case BOND_LINK_BACK:
|
|
if (!link_state) {
|
|
bond_propose_link_state(slave, BOND_LINK_DOWN);
|
|
netdev_info(bond->dev, "link status down again after %d ms for interface %s\n",
|
|
(bond->params.updelay - slave->delay) *
|
|
bond->params.miimon,
|
|
slave->dev->name);
|
|
commit++;
|
|
continue;
|
|
}
|
|
|
|
if (ignore_updelay)
|
|
slave->delay = 0;
|
|
|
|
if (slave->delay <= 0) {
|
|
slave->new_link = BOND_LINK_UP;
|
|
commit++;
|
|
ignore_updelay = false;
|
|
continue;
|
|
}
|
|
|
|
slave->delay--;
|
|
break;
|
|
}
|
|
}
|
|
|
|
return commit;
|
|
}
|
|
|
|
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->new_link) {
|
|
case BOND_LINK_NOCHANGE:
|
|
continue;
|
|
|
|
case BOND_LINK_UP:
|
|
if (bond_update_speed_duplex(slave)) {
|
|
slave->link = BOND_LINK_DOWN;
|
|
netdev_warn(bond->dev,
|
|
"failed to get link speed/duplex for %s\n",
|
|
slave->dev->name);
|
|
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);
|
|
} else if (slave != primary) {
|
|
/* prevent it from being the active one */
|
|
bond_set_backup_slave(slave);
|
|
}
|
|
|
|
netdev_info(bond->dev, "link status definitely up for interface %s, %u Mbps %s duplex\n",
|
|
slave->dev->name,
|
|
slave->speed == SPEED_UNKNOWN ? 0 : slave->speed,
|
|
slave->duplex ? "full" : "half");
|
|
|
|
/* notify ad that the link status has changed */
|
|
if (BOND_MODE(bond) == BOND_MODE_8023AD)
|
|
bond_3ad_handle_link_change(slave, BOND_LINK_UP);
|
|
|
|
if (bond_is_lb(bond))
|
|
bond_alb_handle_link_change(bond, slave,
|
|
BOND_LINK_UP);
|
|
|
|
if (BOND_MODE(bond) == BOND_MODE_XOR)
|
|
bond_update_slave_arr(bond, NULL);
|
|
|
|
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);
|
|
|
|
netdev_info(bond->dev, "link status definitely down for interface %s, disabling it\n",
|
|
slave->dev->name);
|
|
|
|
if (BOND_MODE(bond) == BOND_MODE_8023AD)
|
|
bond_3ad_handle_link_change(slave,
|
|
BOND_LINK_DOWN);
|
|
|
|
if (bond_is_lb(bond))
|
|
bond_alb_handle_link_change(bond, slave,
|
|
BOND_LINK_DOWN);
|
|
|
|
if (BOND_MODE(bond) == BOND_MODE_XOR)
|
|
bond_update_slave_arr(bond, NULL);
|
|
|
|
if (slave == rcu_access_pointer(bond->curr_active_slave))
|
|
goto do_failover;
|
|
|
|
continue;
|
|
|
|
default:
|
|
netdev_err(bond->dev, "invalid new link %d on slave %s\n",
|
|
slave->new_link, slave->dev->name);
|
|
slave->new_link = 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;
|
|
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);
|
|
|
|
if (bond_miimon_inspect(bond)) {
|
|
rcu_read_unlock();
|
|
|
|
/* 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 */
|
|
} else
|
|
rcu_read_unlock();
|
|
|
|
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, void *data)
|
|
{
|
|
__be32 ip = *((__be32 *)data);
|
|
|
|
return ip == bond_confirm_addr(upper, 0, ip);
|
|
}
|
|
|
|
static bool bond_has_this_ip(struct bonding *bond, __be32 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, &ip))
|
|
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 net_device *slave_dev, 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;
|
|
|
|
netdev_dbg(slave_dev, "arp %d on slave %s: dst %pI4 src %pI4\n",
|
|
arp_op, slave_dev->name, &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;
|
|
}
|
|
|
|
netdev_dbg(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) {
|
|
netdev_dbg(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 = kzalloc(sizeof(*tags) * (level + 1), 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++) {
|
|
netdev_dbg(bond->dev, "basa: target %pI4\n", &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->dev, 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 */
|
|
netdev_dbg(bond->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->dev, 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)) {
|
|
netdev_dbg(bond->dev, "bva: sip %pI4 tip %pI4 not found\n",
|
|
&sip, &tip);
|
|
return;
|
|
}
|
|
|
|
i = bond_get_targets_ip(bond->params.arp_targets, sip);
|
|
if (i == -1) {
|
|
netdev_dbg(bond->dev, "bva: sip %pI4 not found in targets\n",
|
|
&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 alen, is_arp = skb->protocol == __cpu_to_be16(ETH_P_ARP);
|
|
|
|
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);
|
|
|
|
netdev_dbg(bond->dev, "bond_arp_rcv: skb->dev %s\n",
|
|
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);
|
|
|
|
netdev_dbg(bond->dev, "bond_arp_rcv: %s/%d av %d sv %d sip %pI4 tip %pI4\n",
|
|
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);
|
|
|
|
if (slave->link != BOND_LINK_UP) {
|
|
if (bond_time_in_interval(bond, trans_start, 1) &&
|
|
bond_time_in_interval(bond, slave->last_rx, 1)) {
|
|
|
|
slave->link = 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) {
|
|
netdev_info(bond->dev, "link status definitely up for interface %s\n",
|
|
slave->dev->name);
|
|
do_failover = 1;
|
|
} else {
|
|
netdev_info(bond->dev, "interface %s is now up\n",
|
|
slave->dev->name);
|
|
}
|
|
}
|
|
} 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)) {
|
|
|
|
slave->link = BOND_LINK_DOWN;
|
|
slave_state_changed = 1;
|
|
|
|
if (slave->link_failure_count < UINT_MAX)
|
|
slave->link_failure_count++;
|
|
|
|
netdev_info(bond->dev, "interface %s is now down\n",
|
|
slave->dev->name);
|
|
|
|
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;
|
|
|
|
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 new_link in slaves to specify what action should take
|
|
* place for the slave. Returns 0 if no changes are found, >0 if changes
|
|
* to link states must be committed.
|
|
*
|
|
* Called with rcu_read_lock 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) {
|
|
slave->new_link = 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)) {
|
|
slave->new_link = BOND_LINK_UP;
|
|
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)) {
|
|
slave->new_link = 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))) {
|
|
slave->new_link = 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->new_link) {
|
|
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);
|
|
}
|
|
|
|
netdev_info(bond->dev, "link status definitely up for interface %s\n",
|
|
slave->dev->name);
|
|
|
|
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);
|
|
|
|
netdev_info(bond->dev, "link status definitely down for interface %s, disabling it\n",
|
|
slave->dev->name);
|
|
|
|
if (slave == rtnl_dereference(bond->curr_active_slave)) {
|
|
RCU_INIT_POINTER(bond->current_arp_slave, NULL);
|
|
goto do_failover;
|
|
}
|
|
|
|
continue;
|
|
|
|
default:
|
|
netdev_err(bond->dev, "impossible: new_link %d on slave %s\n",
|
|
slave->new_link, slave->dev->name);
|
|
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_set_slave_inactive_flags(curr_arp_slave, BOND_SLAVE_NOTIFY_LATER);
|
|
|
|
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);
|
|
|
|
netdev_info(bond->dev, "backup interface %s is now down\n",
|
|
slave->dev->name);
|
|
}
|
|
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);
|
|
|
|
switch (event) {
|
|
case NETDEV_CHANGENAME:
|
|
return bond_event_changename(event_bond);
|
|
case NETDEV_UNREGISTER:
|
|
bond_remove_proc_entry(event_bond);
|
|
break;
|
|
case NETDEV_REGISTER:
|
|
bond_create_proc_entry(event_bond);
|
|
break;
|
|
case NETDEV_NOTIFY_PEERS:
|
|
if (event_bond->send_peer_notif)
|
|
event_bond->send_peer_notif--;
|
|
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)
|
|
return NOTIFY_DONE;
|
|
bond_dev = slave->bond->dev;
|
|
bond = slave->bond;
|
|
primary = rtnl_dereference(bond->primary_slave);
|
|
|
|
switch (event) {
|
|
case NETDEV_UNREGISTER:
|
|
if (bond_dev->type != ARPHRD_ETHER)
|
|
bond_release_and_destroy(bond_dev, slave_dev);
|
|
else
|
|
bond_release(bond_dev, slave_dev);
|
|
break;
|
|
case NETDEV_UP:
|
|
case NETDEV_CHANGE:
|
|
bond_update_speed_duplex(slave);
|
|
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_uses_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, "event: %lx\n", event);
|
|
|
|
if (!(event_dev->priv_flags & IFF_BONDING))
|
|
return NOTIFY_DONE;
|
|
|
|
if (event_dev->flags & IFF_MASTER) {
|
|
netdev_dbg(event_dev, "IFF_MASTER\n");
|
|
return bond_master_netdev_event(event, event_dev);
|
|
}
|
|
|
|
if (event_dev->flags & IFF_SLAVE) {
|
|
netdev_dbg(event_dev, "IFF_SLAVE\n");
|
|
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;
|
|
}
|
|
|
|
/* 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)
|
|
{
|
|
const struct ipv6hdr *iph6;
|
|
const struct iphdr *iph;
|
|
int noff, proto = -1;
|
|
|
|
if (bond->params.xmit_policy > BOND_XMIT_POLICY_LAYER23)
|
|
return skb_flow_dissect_flow_keys(skb, fk, 0);
|
|
|
|
fk->ports.ports = 0;
|
|
noff = skb_network_offset(skb);
|
|
if (skb->protocol == htons(ETH_P_IP)) {
|
|
if (unlikely(!pskb_may_pull(skb, noff + sizeof(*iph))))
|
|
return false;
|
|
iph = ip_hdr(skb);
|
|
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 = ipv6_hdr(skb);
|
|
iph_to_flow_copy_v6addrs(fk, iph6);
|
|
noff += sizeof(*iph6);
|
|
proto = iph6->nexthdr;
|
|
} else {
|
|
return false;
|
|
}
|
|
if (bond->params.xmit_policy == BOND_XMIT_POLICY_LAYER34 && proto >= 0)
|
|
fk->ports.ports = skb_flow_get_ports(skb, noff, proto);
|
|
|
|
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
|
|
hash = (__force u32)flow.ports.ports;
|
|
hash ^= (__force u32)flow_get_u32_dst(&flow) ^
|
|
(__force u32)flow_get_u32_src(&flow);
|
|
hash ^= (hash >> 16);
|
|
hash ^= (hash >> 8);
|
|
|
|
return hash;
|
|
}
|
|
|
|
/*-------------------------- Device entry points ----------------------------*/
|
|
|
|
static 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)
|
|
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_uses_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;
|
|
}
|
|
}
|
|
|
|
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;
|
|
|
|
spin_lock(&bond->stats_lock);
|
|
memcpy(stats, &bond->bond_stats, sizeof(*stats));
|
|
|
|
rcu_read_lock();
|
|
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));
|
|
}
|
|
rcu_read_unlock();
|
|
|
|
memcpy(&bond->bond_stats, stats, sizeof(*stats));
|
|
spin_unlock(&bond->stats_lock);
|
|
}
|
|
|
|
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;
|
|
/* Fall Through */
|
|
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);
|
|
|
|
netdev_dbg(bond_dev, "slave_dev=%p:\n", slave_dev);
|
|
|
|
if (!slave_dev)
|
|
return -ENODEV;
|
|
|
|
netdev_dbg(bond_dev, "slave_dev->name=%s:\n", slave_dev->name);
|
|
switch (cmd) {
|
|
case BOND_ENSLAVE_OLD:
|
|
case SIOCBONDENSLAVE:
|
|
res = bond_enslave(bond_dev, slave_dev);
|
|
break;
|
|
case BOND_RELEASE_OLD:
|
|
case SIOCBONDRELEASE:
|
|
res = bond_release(bond_dev, slave_dev);
|
|
break;
|
|
case BOND_SETHWADDR_OLD:
|
|
case SIOCBONDSETHWADDR:
|
|
bond_set_dev_addr(bond_dev, slave_dev);
|
|
res = 0;
|
|
break;
|
|
case BOND_CHANGE_ACTIVE_OLD:
|
|
case SIOCBONDCHANGEACTIVE:
|
|
bond_opt_initstr(&newval, slave_dev->name);
|
|
res = __bond_opt_set(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;
|
|
|
|
slave = bond_first_slave(bond);
|
|
if (!slave)
|
|
return 0;
|
|
slave_ops = slave->dev->netdev_ops;
|
|
if (!slave_ops->ndo_neigh_setup)
|
|
return 0;
|
|
|
|
parms.neigh_setup = NULL;
|
|
parms.neigh_cleanup = NULL;
|
|
ret = slave_ops->ndo_neigh_setup(slave->dev, &parms);
|
|
if (ret)
|
|
return ret;
|
|
|
|
/* Assign slave's neigh_cleanup to neighbour in case cleanup is called
|
|
* after the last slave has been detached. Assumes that all slaves
|
|
* utilize the same neigh_cleanup (true at this writing as only user
|
|
* is ipoib).
|
|
*/
|
|
n->parms->neigh_cleanup = parms.neigh_cleanup;
|
|
|
|
if (!parms.neigh_setup)
|
|
return 0;
|
|
|
|
return parms.neigh_setup(n);
|
|
}
|
|
|
|
/* 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) {
|
|
netdev_dbg(bond_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.
|
|
*/
|
|
netdev_dbg(bond_dev, "err %d %s\n", res,
|
|
slave->dev->name);
|
|
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) {
|
|
netdev_dbg(bond_dev, "unwind err %d dev %s\n",
|
|
tmp_res, rollback_slave->dev->name);
|
|
}
|
|
}
|
|
|
|
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, "bond=%p\n", 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) {
|
|
netdev_dbg(bond_dev, "slave %p %s\n", slave, slave->dev->name);
|
|
res = dev_set_mac_address(slave->dev, addr);
|
|
if (res) {
|
|
/* TODO: consider downing the slave
|
|
* and retry ?
|
|
* User should expect communications
|
|
* breakage anyway until ARP finish
|
|
* updating, so...
|
|
*/
|
|
netdev_dbg(bond_dev, "err %d %s\n", res, slave->dev->name);
|
|
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);
|
|
if (tmp_res) {
|
|
netdev_dbg(bond_dev, "unwind err %d dev %s\n",
|
|
tmp_res, rollback_slave->dev->name);
|
|
}
|
|
}
|
|
|
|
return res;
|
|
}
|
|
|
|
/**
|
|
* bond_xmit_slave_id - transmit skb through slave with slave_id
|
|
* @bond: bonding device that is transmitting
|
|
* @skb: buffer to transmit
|
|
* @slave_id: slave id up to slave_cnt-1 through which to transmit
|
|
*
|
|
* This function tries to transmit through slave with slave_id but in case
|
|
* it fails, it tries to find the first available slave for transmission.
|
|
* The skb is consumed in all cases, thus the function is void.
|
|
*/
|
|
static void bond_xmit_slave_id(struct bonding *bond, struct sk_buff *skb, 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)) {
|
|
bond_dev_queue_xmit(bond, skb, slave->dev);
|
|
return;
|
|
}
|
|
}
|
|
}
|
|
|
|
/* 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)) {
|
|
bond_dev_queue_xmit(bond, skb, slave->dev);
|
|
return;
|
|
}
|
|
}
|
|
/* no slave that can tx has been found */
|
|
bond_tx_drop(bond->dev, skb);
|
|
}
|
|
|
|
/**
|
|
* 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 int bond_xmit_roundrobin(struct sk_buff *skb, struct net_device *bond_dev)
|
|
{
|
|
struct bonding *bond = netdev_priv(bond_dev);
|
|
struct iphdr *iph = ip_hdr(skb);
|
|
struct slave *slave;
|
|
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 (iph->protocol == IPPROTO_IGMP && skb->protocol == htons(ETH_P_IP)) {
|
|
slave = rcu_dereference(bond->curr_active_slave);
|
|
if (slave)
|
|
bond_dev_queue_xmit(bond, skb, slave->dev);
|
|
else
|
|
bond_xmit_slave_id(bond, skb, 0);
|
|
} else {
|
|
int slave_cnt = ACCESS_ONCE(bond->slave_cnt);
|
|
|
|
if (likely(slave_cnt)) {
|
|
slave_id = bond_rr_gen_slave_id(bond);
|
|
bond_xmit_slave_id(bond, skb, slave_id % slave_cnt);
|
|
} else {
|
|
bond_tx_drop(bond_dev, skb);
|
|
}
|
|
}
|
|
|
|
return NETDEV_TX_OK;
|
|
}
|
|
|
|
/* In active-backup mode, we know that bond->curr_active_slave is always valid if
|
|
* the bond has a usable interface.
|
|
*/
|
|
static int bond_xmit_activebackup(struct sk_buff *skb, struct net_device *bond_dev)
|
|
{
|
|
struct bonding *bond = netdev_priv(bond_dev);
|
|
struct slave *slave;
|
|
|
|
slave = rcu_dereference(bond->curr_active_slave);
|
|
if (slave)
|
|
bond_dev_queue_xmit(bond, skb, slave->dev);
|
|
else
|
|
bond_tx_drop(bond_dev, skb);
|
|
|
|
return NETDEV_TX_OK;
|
|
}
|
|
|
|
/* 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);
|
|
}
|
|
|
|
/* Build the usable slaves array in control path for modes that use xmit-hash
|
|
* to determine the slave interface -
|
|
* (a) BOND_MODE_8023AD
|
|
* (b) BOND_MODE_XOR
|
|
* (c) BOND_MODE_TLB && tlb_dynamic_lb == 0
|
|
*
|
|
* The caller is expected to hold RTNL only and NO other lock!
|
|
*/
|
|
int bond_update_slave_arr(struct bonding *bond, struct slave *skipslave)
|
|
{
|
|
struct slave *slave;
|
|
struct list_head *iter;
|
|
struct bond_up_slave *new_arr, *old_arr;
|
|
int agg_id = 0;
|
|
int ret = 0;
|
|
|
|
#ifdef CONFIG_LOCKDEP
|
|
WARN_ON(lockdep_is_held(&bond->mode_lock));
|
|
#endif
|
|
|
|
new_arr = kzalloc(offsetof(struct bond_up_slave, arr[bond->slave_cnt]),
|
|
GFP_KERNEL);
|
|
if (!new_arr) {
|
|
ret = -ENOMEM;
|
|
pr_err("Failed to build slave-array.\n");
|
|
goto out;
|
|
}
|
|
if (BOND_MODE(bond) == BOND_MODE_8023AD) {
|
|
struct ad_info ad_info;
|
|
|
|
if (bond_3ad_get_active_agg_info(bond, &ad_info)) {
|
|
pr_debug("bond_3ad_get_active_agg_info failed\n");
|
|
kfree_rcu(new_arr, rcu);
|
|
/* No active aggragator means it's not safe to use
|
|
* the previous array.
|
|
*/
|
|
old_arr = rtnl_dereference(bond->slave_arr);
|
|
if (old_arr) {
|
|
RCU_INIT_POINTER(bond->slave_arr, NULL);
|
|
kfree_rcu(old_arr, rcu);
|
|
}
|
|
goto out;
|
|
}
|
|
agg_id = ad_info.aggregator_id;
|
|
}
|
|
bond_for_each_slave(bond, slave, iter) {
|
|
if (BOND_MODE(bond) == BOND_MODE_8023AD) {
|
|
struct aggregator *agg;
|
|
|
|
agg = SLAVE_AD_INFO(slave)->port.aggregator;
|
|
if (!agg || agg->aggregator_identifier != agg_id)
|
|
continue;
|
|
}
|
|
if (!bond_slave_can_tx(slave))
|
|
continue;
|
|
if (skipslave == slave)
|
|
continue;
|
|
new_arr->arr[new_arr->count++] = slave;
|
|
}
|
|
|
|
old_arr = rtnl_dereference(bond->slave_arr);
|
|
rcu_assign_pointer(bond->slave_arr, new_arr);
|
|
if (old_arr)
|
|
kfree_rcu(old_arr, rcu);
|
|
out:
|
|
if (ret != 0 && skipslave) {
|
|
int idx;
|
|
|
|
/* Rare situation where caller has asked to skip a specific
|
|
* slave but allocation failed (most likely!). BTW this is
|
|
* only possible when the call is initiated from
|
|
* __bond_release_one(). In this situation; overwrite the
|
|
* skipslave entry in the array with the last entry from the
|
|
* array to avoid a situation where the xmit path may choose
|
|
* this to-be-skipped slave to send a packet out.
|
|
*/
|
|
old_arr = rtnl_dereference(bond->slave_arr);
|
|
for (idx = 0; idx < old_arr->count; idx++) {
|
|
if (skipslave == old_arr->arr[idx]) {
|
|
old_arr->arr[idx] =
|
|
old_arr->arr[old_arr->count-1];
|
|
old_arr->count--;
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
/* Use this Xmit function for 3AD as well as XOR modes. The current
|
|
* usable slave array is formed in the control path. The xmit function
|
|
* just calculates hash and sends the packet out.
|
|
*/
|
|
static int bond_3ad_xor_xmit(struct sk_buff *skb, struct net_device *dev)
|
|
{
|
|
struct bonding *bond = netdev_priv(dev);
|
|
struct slave *slave;
|
|
struct bond_up_slave *slaves;
|
|
unsigned int count;
|
|
|
|
slaves = rcu_dereference(bond->slave_arr);
|
|
count = slaves ? ACCESS_ONCE(slaves->count) : 0;
|
|
if (likely(count)) {
|
|
slave = slaves->arr[bond_xmit_hash(bond, skb) % count];
|
|
bond_dev_queue_xmit(bond, skb, slave->dev);
|
|
} else {
|
|
bond_tx_drop(dev, skb);
|
|
}
|
|
|
|
return NETDEV_TX_OK;
|
|
}
|
|
|
|
/* in broadcast mode, we send everything to all usable interfaces. */
|
|
static int 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)
|
|
bond_dev_queue_xmit(bond, skb, slave->dev);
|
|
else
|
|
bond_tx_drop(bond_dev, skb);
|
|
|
|
return NETDEV_TX_OK;
|
|
}
|
|
|
|
/*------------------------- 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->queue_mapping)
|
|
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->queue_mapping) {
|
|
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,
|
|
void *accel_priv, select_queue_fallback_t fallback)
|
|
{
|
|
/* 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->queue_mapping;
|
|
|
|
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 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);
|
|
bond_tx_drop(dev, skb);
|
|
return NETDEV_TX_OK;
|
|
}
|
|
}
|
|
|
|
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
|
|
bond_tx_drop(dev, skb);
|
|
rcu_read_unlock();
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int bond_ethtool_get_link_ksettings(struct net_device *bond_dev,
|
|
struct ethtool_link_ksettings *cmd)
|
|
{
|
|
struct bonding *bond = netdev_priv(bond_dev);
|
|
unsigned long speed = 0;
|
|
struct list_head *iter;
|
|
struct slave *slave;
|
|
|
|
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)
|
|
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));
|
|
strlcpy(drvinfo->version, DRV_VERSION, sizeof(drvinfo->version));
|
|
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_bridge_setlink = switchdev_port_bridge_setlink,
|
|
.ndo_bridge_getlink = switchdev_port_bridge_getlink,
|
|
.ndo_bridge_dellink = switchdev_port_bridge_dellink,
|
|
.ndo_fdb_add = switchdev_port_fdb_add,
|
|
.ndo_fdb_del = switchdev_port_fdb_del,
|
|
.ndo_fdb_dump = switchdev_port_fdb_dump,
|
|
.ndo_features_check = passthru_features_check,
|
|
};
|
|
|
|
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);
|
|
free_netdev(bond_dev);
|
|
}
|
|
|
|
void bond_setup(struct net_device *bond_dev)
|
|
{
|
|
struct bonding *bond = netdev_priv(bond_dev);
|
|
|
|
spin_lock_init(&bond->mode_lock);
|
|
spin_lock_init(&bond->stats_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->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);
|
|
|
|
/* 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_TX |
|
|
NETIF_F_HW_VLAN_CTAG_RX |
|
|
NETIF_F_HW_VLAN_CTAG_FILTER;
|
|
|
|
bond_dev->hw_features |= NETIF_F_GSO_ENCAP_ALL;
|
|
bond_dev->features |= bond_dev->hw_features;
|
|
}
|
|
|
|
/* Destroy a bonding device.
|
|
* Must be under rtnl_lock when this function is called.
|
|
*/
|
|
static void bond_uninit(struct net_device *bond_dev)
|
|
{
|
|
struct bonding *bond = netdev_priv(bond_dev);
|
|
struct list_head *iter;
|
|
struct slave *slave;
|
|
struct bond_up_slave *arr;
|
|
|
|
bond_netpoll_cleanup(bond_dev);
|
|
|
|
/* Release the bonded slaves */
|
|
bond_for_each_slave(bond, slave, iter)
|
|
__bond_release_one(bond_dev, slave->dev, true);
|
|
netdev_info(bond_dev, "Released all slaves\n");
|
|
|
|
arr = rtnl_dereference(bond->slave_arr);
|
|
if (arr) {
|
|
RCU_INIT_POINTER(bond->slave_arr, NULL);
|
|
kfree_rcu(arr, rcu);
|
|
}
|
|
|
|
list_del(&bond->bond_list);
|
|
|
|
bond_debug_unregister(bond);
|
|
}
|
|
|
|
/*------------------------- 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;
|
|
u16 ad_actor_sys_prio = 0;
|
|
u16 ad_user_port_key = 0;
|
|
__be32 arp_target[BOND_MAX_ARP_TARGETS];
|
|
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 = 0;
|
|
|
|
/* 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_XOR) &&
|
|
(bond_mode != BOND_MODE_8023AD) &&
|
|
(bond_mode != BOND_MODE_TLB)) {
|
|
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;
|
|
}
|
|
|
|
arp_all_targets_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;
|
|
|
|
if (bond_mode == BOND_MODE_TLB) {
|
|
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->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;
|
|
|
|
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);
|
|
|
|
netif_carrier_off(bond_dev);
|
|
|
|
bond_work_init_all(bond);
|
|
|
|
rtnl_unlock();
|
|
if (res < 0)
|
|
bond_destructor(bond_dev);
|
|
return res;
|
|
}
|
|
|
|
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;
|
|
|
|
pr_info("%s", bond_version);
|
|
|
|
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;
|
|
}
|
|
|
|
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_VERSION(DRV_VERSION);
|
|
MODULE_DESCRIPTION(DRV_DESCRIPTION ", v" DRV_VERSION);
|
|
MODULE_AUTHOR("Thomas Davis, tadavis@lbl.gov and many others");
|