forked from Minki/linux
6791e4661c
This patch allows user to randomize the system-priority in an ad-system.
The allowed range is 1 - 0xFFFF while default value is 0xFFFF. If user
does not specify this value, the system defaults to 0xFFFF, which is
what it was before this patch.
Following example code could set the value -
# modprobe bonding mode=4
# sys_prio=$(( 1 + RANDOM + RANDOM ))
# echo $sys_prio > /sys/class/net/bond0/bonding/ad_actor_sys_prio
# echo +eth1 > /sys/class/net/bond0/bonding/slaves
...
# ip link set bond0 up
Signed-off-by: Mahesh Bandewar <maheshb@google.com>
Reviewed-by: Nikolay Aleksandrov <nikolay@redhat.com>
[jt: * fixed up style issues reported by checkpatch
* changed how the default value is set in bond_check_params(), this
makes the default consistent between what gets set for a new bond
and what the default is claimed to be in the bonding options.]
Signed-off-by: Jonathan Toppins <jtoppins@cumulusnetworks.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
667 lines
18 KiB
C
667 lines
18 KiB
C
/*
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* Bond several ethernet interfaces into a Cisco, running 'Etherchannel'.
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*
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* Portions are (c) Copyright 1995 Simon "Guru Aleph-Null" Janes
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* NCM: Network and Communications Management, Inc.
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*
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* BUT, I'm the one who modified it for ethernet, so:
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* (c) Copyright 1999, Thomas Davis, tadavis@lbl.gov
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*
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* This software may be used and distributed according to the terms
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* of the GNU Public License, incorporated herein by reference.
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*
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*/
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#ifndef _NET_BONDING_H
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#define _NET_BONDING_H
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#include <linux/timer.h>
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#include <linux/proc_fs.h>
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#include <linux/if_bonding.h>
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#include <linux/cpumask.h>
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#include <linux/in6.h>
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#include <linux/netpoll.h>
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#include <linux/inetdevice.h>
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#include <linux/etherdevice.h>
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#include <linux/reciprocal_div.h>
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#include <linux/if_link.h>
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#include <net/bond_3ad.h>
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#include <net/bond_alb.h>
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#include <net/bond_options.h>
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#define BOND_MAX_ARP_TARGETS 16
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#define BOND_DEFAULT_MIIMON 100
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/*
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* Less bad way to call ioctl from within the kernel; this needs to be
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* done some other way to get the call out of interrupt context.
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* Needs "ioctl" variable to be supplied by calling context.
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*/
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#define IOCTL(dev, arg, cmd) ({ \
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int res = 0; \
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mm_segment_t fs = get_fs(); \
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set_fs(get_ds()); \
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res = ioctl(dev, arg, cmd); \
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set_fs(fs); \
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res; })
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#define BOND_MODE(bond) ((bond)->params.mode)
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/* slave list primitives */
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#define bond_slave_list(bond) (&(bond)->dev->adj_list.lower)
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#define bond_has_slaves(bond) !list_empty(bond_slave_list(bond))
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/* IMPORTANT: bond_first/last_slave can return NULL in case of an empty list */
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#define bond_first_slave(bond) \
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(bond_has_slaves(bond) ? \
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netdev_adjacent_get_private(bond_slave_list(bond)->next) : \
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NULL)
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#define bond_last_slave(bond) \
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(bond_has_slaves(bond) ? \
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netdev_adjacent_get_private(bond_slave_list(bond)->prev) : \
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NULL)
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/* Caller must have rcu_read_lock */
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#define bond_first_slave_rcu(bond) \
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netdev_lower_get_first_private_rcu(bond->dev)
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#define bond_is_first_slave(bond, pos) (pos == bond_first_slave(bond))
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#define bond_is_last_slave(bond, pos) (pos == bond_last_slave(bond))
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/**
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* bond_for_each_slave - iterate over all slaves
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* @bond: the bond holding this list
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* @pos: current slave
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* @iter: list_head * iterator
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*
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* Caller must hold RTNL
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*/
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#define bond_for_each_slave(bond, pos, iter) \
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netdev_for_each_lower_private((bond)->dev, pos, iter)
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/* Caller must have rcu_read_lock */
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#define bond_for_each_slave_rcu(bond, pos, iter) \
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netdev_for_each_lower_private_rcu((bond)->dev, pos, iter)
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#ifdef CONFIG_NET_POLL_CONTROLLER
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extern atomic_t netpoll_block_tx;
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static inline void block_netpoll_tx(void)
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{
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atomic_inc(&netpoll_block_tx);
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}
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static inline void unblock_netpoll_tx(void)
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{
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atomic_dec(&netpoll_block_tx);
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}
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static inline int is_netpoll_tx_blocked(struct net_device *dev)
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{
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if (unlikely(netpoll_tx_running(dev)))
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return atomic_read(&netpoll_block_tx);
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return 0;
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}
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#else
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#define block_netpoll_tx()
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#define unblock_netpoll_tx()
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#define is_netpoll_tx_blocked(dev) (0)
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#endif
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struct bond_params {
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int mode;
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int xmit_policy;
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int miimon;
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u8 num_peer_notif;
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int arp_interval;
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int arp_validate;
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int arp_all_targets;
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int use_carrier;
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int fail_over_mac;
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int updelay;
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int downdelay;
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int lacp_fast;
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unsigned int min_links;
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int ad_select;
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char primary[IFNAMSIZ];
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int primary_reselect;
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__be32 arp_targets[BOND_MAX_ARP_TARGETS];
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int tx_queues;
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int all_slaves_active;
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int resend_igmp;
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int lp_interval;
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int packets_per_slave;
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int tlb_dynamic_lb;
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struct reciprocal_value reciprocal_packets_per_slave;
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u16 ad_actor_sys_prio;
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};
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struct bond_parm_tbl {
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char *modename;
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int mode;
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};
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struct netdev_notify_work {
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struct delayed_work work;
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struct net_device *dev;
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struct netdev_bonding_info bonding_info;
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};
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struct slave {
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struct net_device *dev; /* first - useful for panic debug */
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struct bonding *bond; /* our master */
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int delay;
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/* all three in jiffies */
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unsigned long last_link_up;
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unsigned long last_rx;
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unsigned long target_last_arp_rx[BOND_MAX_ARP_TARGETS];
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s8 link; /* one of BOND_LINK_XXXX */
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s8 new_link;
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u8 backup:1, /* indicates backup slave. Value corresponds with
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BOND_STATE_ACTIVE and BOND_STATE_BACKUP */
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inactive:1, /* indicates inactive slave */
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should_notify:1; /* indicateds whether the state changed */
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u8 duplex;
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u32 original_mtu;
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u32 link_failure_count;
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u32 speed;
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u16 queue_id;
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u8 perm_hwaddr[ETH_ALEN];
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struct ad_slave_info *ad_info;
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struct tlb_slave_info tlb_info;
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#ifdef CONFIG_NET_POLL_CONTROLLER
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struct netpoll *np;
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#endif
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struct kobject kobj;
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struct rtnl_link_stats64 slave_stats;
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};
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struct bond_up_slave {
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unsigned int count;
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struct rcu_head rcu;
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struct slave *arr[0];
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};
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/*
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* Link pseudo-state only used internally by monitors
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*/
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#define BOND_LINK_NOCHANGE -1
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/*
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* Here are the locking policies for the two bonding locks:
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* Get rcu_read_lock when reading or RTNL when writing slave list.
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*/
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struct bonding {
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struct net_device *dev; /* first - useful for panic debug */
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struct slave __rcu *curr_active_slave;
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struct slave __rcu *current_arp_slave;
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struct slave __rcu *primary_slave;
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struct bond_up_slave __rcu *slave_arr; /* Array of usable slaves */
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bool force_primary;
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s32 slave_cnt; /* never change this value outside the attach/detach wrappers */
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int (*recv_probe)(const struct sk_buff *, struct bonding *,
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struct slave *);
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/* mode_lock is used for mode-specific locking needs, currently used by:
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* 3ad mode (4) - protect against running bond_3ad_unbind_slave() and
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* bond_3ad_state_machine_handler() concurrently and also
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* the access to the state machine shared variables.
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* TLB mode (5) - to sync the use and modifications of its hash table
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* ALB mode (6) - to sync the use and modifications of its hash table
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*/
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spinlock_t mode_lock;
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u8 send_peer_notif;
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u8 igmp_retrans;
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#ifdef CONFIG_PROC_FS
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struct proc_dir_entry *proc_entry;
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char proc_file_name[IFNAMSIZ];
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#endif /* CONFIG_PROC_FS */
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struct list_head bond_list;
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u32 rr_tx_counter;
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struct ad_bond_info ad_info;
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struct alb_bond_info alb_info;
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struct bond_params params;
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struct workqueue_struct *wq;
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struct delayed_work mii_work;
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struct delayed_work arp_work;
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struct delayed_work alb_work;
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struct delayed_work ad_work;
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struct delayed_work mcast_work;
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struct delayed_work slave_arr_work;
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#ifdef CONFIG_DEBUG_FS
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/* debugging support via debugfs */
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struct dentry *debug_dir;
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#endif /* CONFIG_DEBUG_FS */
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struct rtnl_link_stats64 bond_stats;
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};
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#define bond_slave_get_rcu(dev) \
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((struct slave *) rcu_dereference(dev->rx_handler_data))
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#define bond_slave_get_rtnl(dev) \
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((struct slave *) rtnl_dereference(dev->rx_handler_data))
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void bond_queue_slave_event(struct slave *slave);
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struct bond_vlan_tag {
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__be16 vlan_proto;
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unsigned short vlan_id;
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};
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/**
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* Returns NULL if the net_device does not belong to any of the bond's slaves
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*
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* Caller must hold bond lock for read
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*/
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static inline struct slave *bond_get_slave_by_dev(struct bonding *bond,
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struct net_device *slave_dev)
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{
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return netdev_lower_dev_get_private(bond->dev, slave_dev);
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}
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static inline struct bonding *bond_get_bond_by_slave(struct slave *slave)
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{
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return slave->bond;
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}
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static inline bool bond_should_override_tx_queue(struct bonding *bond)
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{
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return BOND_MODE(bond) == BOND_MODE_ACTIVEBACKUP ||
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BOND_MODE(bond) == BOND_MODE_ROUNDROBIN;
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}
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static inline bool bond_is_lb(const struct bonding *bond)
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{
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return BOND_MODE(bond) == BOND_MODE_TLB ||
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BOND_MODE(bond) == BOND_MODE_ALB;
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}
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static inline bool bond_is_nondyn_tlb(const struct bonding *bond)
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{
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return (BOND_MODE(bond) == BOND_MODE_TLB) &&
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(bond->params.tlb_dynamic_lb == 0);
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}
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static inline bool bond_mode_uses_xmit_hash(const struct bonding *bond)
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{
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return (BOND_MODE(bond) == BOND_MODE_8023AD ||
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BOND_MODE(bond) == BOND_MODE_XOR ||
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bond_is_nondyn_tlb(bond));
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}
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static inline bool bond_mode_uses_arp(int mode)
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{
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return mode != BOND_MODE_8023AD && mode != BOND_MODE_TLB &&
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mode != BOND_MODE_ALB;
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}
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static inline bool bond_mode_uses_primary(int mode)
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{
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return mode == BOND_MODE_ACTIVEBACKUP || mode == BOND_MODE_TLB ||
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mode == BOND_MODE_ALB;
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}
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static inline bool bond_uses_primary(struct bonding *bond)
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{
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return bond_mode_uses_primary(BOND_MODE(bond));
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}
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static inline bool bond_slave_is_up(struct slave *slave)
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{
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return netif_running(slave->dev) && netif_carrier_ok(slave->dev);
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}
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static inline void bond_set_active_slave(struct slave *slave)
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{
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if (slave->backup) {
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slave->backup = 0;
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bond_queue_slave_event(slave);
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rtmsg_ifinfo(RTM_NEWLINK, slave->dev, 0, GFP_ATOMIC);
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}
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}
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static inline void bond_set_backup_slave(struct slave *slave)
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{
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if (!slave->backup) {
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slave->backup = 1;
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bond_queue_slave_event(slave);
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rtmsg_ifinfo(RTM_NEWLINK, slave->dev, 0, GFP_ATOMIC);
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}
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}
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static inline void bond_set_slave_state(struct slave *slave,
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int slave_state, bool notify)
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{
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if (slave->backup == slave_state)
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return;
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slave->backup = slave_state;
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if (notify) {
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rtmsg_ifinfo(RTM_NEWLINK, slave->dev, 0, GFP_ATOMIC);
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bond_queue_slave_event(slave);
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slave->should_notify = 0;
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} else {
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if (slave->should_notify)
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slave->should_notify = 0;
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else
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slave->should_notify = 1;
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}
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}
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static inline void bond_slave_state_change(struct bonding *bond)
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{
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struct list_head *iter;
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struct slave *tmp;
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bond_for_each_slave(bond, tmp, iter) {
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if (tmp->link == BOND_LINK_UP)
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bond_set_active_slave(tmp);
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else if (tmp->link == BOND_LINK_DOWN)
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bond_set_backup_slave(tmp);
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}
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}
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static inline void bond_slave_state_notify(struct bonding *bond)
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{
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struct list_head *iter;
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struct slave *tmp;
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bond_for_each_slave(bond, tmp, iter) {
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if (tmp->should_notify) {
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rtmsg_ifinfo(RTM_NEWLINK, tmp->dev, 0, GFP_ATOMIC);
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tmp->should_notify = 0;
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}
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}
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}
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static inline int bond_slave_state(struct slave *slave)
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{
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return slave->backup;
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}
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static inline bool bond_is_active_slave(struct slave *slave)
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{
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return !bond_slave_state(slave);
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}
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static inline bool bond_slave_can_tx(struct slave *slave)
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{
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return bond_slave_is_up(slave) && slave->link == BOND_LINK_UP &&
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bond_is_active_slave(slave);
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}
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#define BOND_PRI_RESELECT_ALWAYS 0
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#define BOND_PRI_RESELECT_BETTER 1
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#define BOND_PRI_RESELECT_FAILURE 2
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#define BOND_FOM_NONE 0
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#define BOND_FOM_ACTIVE 1
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#define BOND_FOM_FOLLOW 2
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#define BOND_ARP_TARGETS_ANY 0
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#define BOND_ARP_TARGETS_ALL 1
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#define BOND_ARP_VALIDATE_NONE 0
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#define BOND_ARP_VALIDATE_ACTIVE (1 << BOND_STATE_ACTIVE)
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#define BOND_ARP_VALIDATE_BACKUP (1 << BOND_STATE_BACKUP)
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#define BOND_ARP_VALIDATE_ALL (BOND_ARP_VALIDATE_ACTIVE | \
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BOND_ARP_VALIDATE_BACKUP)
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#define BOND_ARP_FILTER (BOND_ARP_VALIDATE_ALL + 1)
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#define BOND_ARP_FILTER_ACTIVE (BOND_ARP_VALIDATE_ACTIVE | \
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BOND_ARP_FILTER)
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#define BOND_ARP_FILTER_BACKUP (BOND_ARP_VALIDATE_BACKUP | \
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BOND_ARP_FILTER)
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#define BOND_SLAVE_NOTIFY_NOW true
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#define BOND_SLAVE_NOTIFY_LATER false
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static inline int slave_do_arp_validate(struct bonding *bond,
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struct slave *slave)
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{
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return bond->params.arp_validate & (1 << bond_slave_state(slave));
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}
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static inline int slave_do_arp_validate_only(struct bonding *bond)
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{
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return bond->params.arp_validate & BOND_ARP_FILTER;
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}
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static inline int bond_is_ip_target_ok(__be32 addr)
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{
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return !ipv4_is_lbcast(addr) && !ipv4_is_zeronet(addr);
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}
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/* Get the oldest arp which we've received on this slave for bond's
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* arp_targets.
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*/
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static inline unsigned long slave_oldest_target_arp_rx(struct bonding *bond,
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struct slave *slave)
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{
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int i = 1;
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unsigned long ret = slave->target_last_arp_rx[0];
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for (; (i < BOND_MAX_ARP_TARGETS) && bond->params.arp_targets[i]; i++)
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if (time_before(slave->target_last_arp_rx[i], ret))
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ret = slave->target_last_arp_rx[i];
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return ret;
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}
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static inline unsigned long slave_last_rx(struct bonding *bond,
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struct slave *slave)
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{
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if (bond->params.arp_all_targets == BOND_ARP_TARGETS_ALL)
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return slave_oldest_target_arp_rx(bond, slave);
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return slave->last_rx;
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}
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#ifdef CONFIG_NET_POLL_CONTROLLER
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static inline void bond_netpoll_send_skb(const struct slave *slave,
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struct sk_buff *skb)
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{
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struct netpoll *np = slave->np;
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if (np)
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netpoll_send_skb(np, skb);
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}
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#else
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static inline void bond_netpoll_send_skb(const struct slave *slave,
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struct sk_buff *skb)
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{
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}
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#endif
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static inline void bond_set_slave_inactive_flags(struct slave *slave,
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bool notify)
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{
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if (!bond_is_lb(slave->bond))
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bond_set_slave_state(slave, BOND_STATE_BACKUP, notify);
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if (!slave->bond->params.all_slaves_active)
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slave->inactive = 1;
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}
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static inline void bond_set_slave_active_flags(struct slave *slave,
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bool notify)
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{
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bond_set_slave_state(slave, BOND_STATE_ACTIVE, notify);
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slave->inactive = 0;
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}
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static inline bool bond_is_slave_inactive(struct slave *slave)
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{
|
|
return slave->inactive;
|
|
}
|
|
|
|
static inline void bond_set_slave_link_state(struct slave *slave, int state)
|
|
{
|
|
slave->link = state;
|
|
bond_queue_slave_event(slave);
|
|
}
|
|
|
|
static inline __be32 bond_confirm_addr(struct net_device *dev, __be32 dst, __be32 local)
|
|
{
|
|
struct in_device *in_dev;
|
|
__be32 addr = 0;
|
|
|
|
rcu_read_lock();
|
|
in_dev = __in_dev_get_rcu(dev);
|
|
|
|
if (in_dev)
|
|
addr = inet_confirm_addr(dev_net(dev), in_dev, dst, local,
|
|
RT_SCOPE_HOST);
|
|
rcu_read_unlock();
|
|
return addr;
|
|
}
|
|
|
|
struct bond_net {
|
|
struct net *net; /* Associated network namespace */
|
|
struct list_head dev_list;
|
|
#ifdef CONFIG_PROC_FS
|
|
struct proc_dir_entry *proc_dir;
|
|
#endif
|
|
struct class_attribute class_attr_bonding_masters;
|
|
};
|
|
|
|
int bond_arp_rcv(const struct sk_buff *skb, struct bonding *bond, struct slave *slave);
|
|
void bond_dev_queue_xmit(struct bonding *bond, struct sk_buff *skb, struct net_device *slave_dev);
|
|
int bond_create(struct net *net, const char *name);
|
|
int bond_create_sysfs(struct bond_net *net);
|
|
void bond_destroy_sysfs(struct bond_net *net);
|
|
void bond_prepare_sysfs_group(struct bonding *bond);
|
|
int bond_sysfs_slave_add(struct slave *slave);
|
|
void bond_sysfs_slave_del(struct slave *slave);
|
|
int bond_enslave(struct net_device *bond_dev, struct net_device *slave_dev);
|
|
int bond_release(struct net_device *bond_dev, struct net_device *slave_dev);
|
|
u32 bond_xmit_hash(struct bonding *bond, struct sk_buff *skb);
|
|
int bond_set_carrier(struct bonding *bond);
|
|
void bond_select_active_slave(struct bonding *bond);
|
|
void bond_change_active_slave(struct bonding *bond, struct slave *new_active);
|
|
void bond_create_debugfs(void);
|
|
void bond_destroy_debugfs(void);
|
|
void bond_debug_register(struct bonding *bond);
|
|
void bond_debug_unregister(struct bonding *bond);
|
|
void bond_debug_reregister(struct bonding *bond);
|
|
const char *bond_mode_name(int mode);
|
|
void bond_setup(struct net_device *bond_dev);
|
|
unsigned int bond_get_num_tx_queues(void);
|
|
int bond_netlink_init(void);
|
|
void bond_netlink_fini(void);
|
|
struct net_device *bond_option_active_slave_get_rcu(struct bonding *bond);
|
|
const char *bond_slave_link_status(s8 link);
|
|
struct bond_vlan_tag *bond_verify_device_path(struct net_device *start_dev,
|
|
struct net_device *end_dev,
|
|
int level);
|
|
int bond_update_slave_arr(struct bonding *bond, struct slave *skipslave);
|
|
void bond_slave_arr_work_rearm(struct bonding *bond, unsigned long delay);
|
|
|
|
#ifdef CONFIG_PROC_FS
|
|
void bond_create_proc_entry(struct bonding *bond);
|
|
void bond_remove_proc_entry(struct bonding *bond);
|
|
void bond_create_proc_dir(struct bond_net *bn);
|
|
void bond_destroy_proc_dir(struct bond_net *bn);
|
|
#else
|
|
static inline void bond_create_proc_entry(struct bonding *bond)
|
|
{
|
|
}
|
|
|
|
static inline void bond_remove_proc_entry(struct bonding *bond)
|
|
{
|
|
}
|
|
|
|
static inline void bond_create_proc_dir(struct bond_net *bn)
|
|
{
|
|
}
|
|
|
|
static inline void bond_destroy_proc_dir(struct bond_net *bn)
|
|
{
|
|
}
|
|
#endif
|
|
|
|
static inline struct slave *bond_slave_has_mac(struct bonding *bond,
|
|
const u8 *mac)
|
|
{
|
|
struct list_head *iter;
|
|
struct slave *tmp;
|
|
|
|
bond_for_each_slave(bond, tmp, iter)
|
|
if (ether_addr_equal_64bits(mac, tmp->dev->dev_addr))
|
|
return tmp;
|
|
|
|
return NULL;
|
|
}
|
|
|
|
/* Caller must hold rcu_read_lock() for read */
|
|
static inline struct slave *bond_slave_has_mac_rcu(struct bonding *bond,
|
|
const u8 *mac)
|
|
{
|
|
struct list_head *iter;
|
|
struct slave *tmp;
|
|
|
|
bond_for_each_slave_rcu(bond, tmp, iter)
|
|
if (ether_addr_equal_64bits(mac, tmp->dev->dev_addr))
|
|
return tmp;
|
|
|
|
return NULL;
|
|
}
|
|
|
|
/* Caller must hold rcu_read_lock() for read */
|
|
static inline bool bond_slave_has_mac_rx(struct bonding *bond, const u8 *mac)
|
|
{
|
|
struct list_head *iter;
|
|
struct slave *tmp;
|
|
struct netdev_hw_addr *ha;
|
|
|
|
bond_for_each_slave_rcu(bond, tmp, iter)
|
|
if (ether_addr_equal_64bits(mac, tmp->dev->dev_addr))
|
|
return true;
|
|
|
|
if (netdev_uc_empty(bond->dev))
|
|
return false;
|
|
|
|
netdev_for_each_uc_addr(ha, bond->dev)
|
|
if (ether_addr_equal_64bits(mac, ha->addr))
|
|
return true;
|
|
|
|
return false;
|
|
}
|
|
|
|
/* Check if the ip is present in arp ip list, or first free slot if ip == 0
|
|
* Returns -1 if not found, index if found
|
|
*/
|
|
static inline int bond_get_targets_ip(__be32 *targets, __be32 ip)
|
|
{
|
|
int i;
|
|
|
|
for (i = 0; i < BOND_MAX_ARP_TARGETS; i++)
|
|
if (targets[i] == ip)
|
|
return i;
|
|
else if (targets[i] == 0)
|
|
break;
|
|
|
|
return -1;
|
|
}
|
|
|
|
/* exported from bond_main.c */
|
|
extern int bond_net_id;
|
|
extern const struct bond_parm_tbl bond_lacp_tbl[];
|
|
extern const struct bond_parm_tbl xmit_hashtype_tbl[];
|
|
extern const struct bond_parm_tbl arp_validate_tbl[];
|
|
extern const struct bond_parm_tbl arp_all_targets_tbl[];
|
|
extern const struct bond_parm_tbl fail_over_mac_tbl[];
|
|
extern const struct bond_parm_tbl pri_reselect_tbl[];
|
|
extern struct bond_parm_tbl ad_select_tbl[];
|
|
|
|
/* exported from bond_netlink.c */
|
|
extern struct rtnl_link_ops bond_link_ops;
|
|
|
|
static inline void bond_tx_drop(struct net_device *dev, struct sk_buff *skb)
|
|
{
|
|
atomic_long_inc(&dev->tx_dropped);
|
|
dev_kfree_skb_any(skb);
|
|
}
|
|
|
|
#endif /* _NET_BONDING_H */
|