5029 lines
131 KiB
C
5029 lines
131 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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//#define BONDING_DEBUG 1
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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 <asm/system.h>
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#include <asm/io.h>
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#include <asm/dma.h>
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#include <asm/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/proc_fs.h>
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#include <linux/seq_file.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 <net/route.h>
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#include <net/net_namespace.h>
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#include "bonding.h"
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#include "bond_3ad.h"
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#include "bond_alb.h"
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/*---------------------------- Module parameters ----------------------------*/
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/* monitor all links that often (in milliseconds). <=0 disables monitoring */
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#define BOND_LINK_MON_INTERV 0
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#define BOND_LINK_ARP_INTERV 0
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static int max_bonds = BOND_DEFAULT_MAX_BONDS;
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static int miimon = BOND_LINK_MON_INTERV;
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static int updelay = 0;
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static int downdelay = 0;
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static int use_carrier = 1;
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static char *mode = NULL;
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static char *primary = NULL;
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static char *lacp_rate = NULL;
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static char *xmit_hash_policy = NULL;
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static int arp_interval = BOND_LINK_ARP_INTERV;
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static char *arp_ip_target[BOND_MAX_ARP_TARGETS] = { NULL, };
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static char *arp_validate = NULL;
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static int fail_over_mac = 0;
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struct bond_params bonding_defaults;
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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(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(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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"(slow/fast)");
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module_param(xmit_hash_policy, charp, 0);
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MODULE_PARM_DESC(xmit_hash_policy, "XOR hashing method: 0 for layer 2 (default)"
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", 1 for 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: none (default), active, backup or all");
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module_param(fail_over_mac, int, 0);
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MODULE_PARM_DESC(fail_over_mac, "For active-backup, do not set all slaves to the same MAC. 0 of off (default), 1 for on.");
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/*----------------------------- Global variables ----------------------------*/
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static const char * const version =
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DRV_DESCRIPTION ": v" DRV_VERSION " (" DRV_RELDATE ")\n";
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LIST_HEAD(bond_dev_list);
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#ifdef CONFIG_PROC_FS
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static struct proc_dir_entry *bond_proc_dir = NULL;
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#endif
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extern struct rw_semaphore bonding_rwsem;
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static __be32 arp_target[BOND_MAX_ARP_TARGETS] = { 0, } ;
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static int arp_ip_count = 0;
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static int bond_mode = BOND_MODE_ROUNDROBIN;
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static int xmit_hashtype= BOND_XMIT_POLICY_LAYER2;
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static int lacp_fast = 0;
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struct bond_parm_tbl bond_lacp_tbl[] = {
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{ "slow", AD_LACP_SLOW},
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{ "fast", AD_LACP_FAST},
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{ NULL, -1},
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};
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struct bond_parm_tbl bond_mode_tbl[] = {
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{ "balance-rr", BOND_MODE_ROUNDROBIN},
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{ "active-backup", BOND_MODE_ACTIVEBACKUP},
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{ "balance-xor", BOND_MODE_XOR},
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{ "broadcast", BOND_MODE_BROADCAST},
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{ "802.3ad", BOND_MODE_8023AD},
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{ "balance-tlb", BOND_MODE_TLB},
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{ "balance-alb", BOND_MODE_ALB},
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{ NULL, -1},
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};
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struct bond_parm_tbl xmit_hashtype_tbl[] = {
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{ "layer2", BOND_XMIT_POLICY_LAYER2},
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{ "layer3+4", BOND_XMIT_POLICY_LAYER34},
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{ "layer2+3", BOND_XMIT_POLICY_LAYER23},
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{ NULL, -1},
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};
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struct bond_parm_tbl arp_validate_tbl[] = {
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{ "none", BOND_ARP_VALIDATE_NONE},
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{ "active", BOND_ARP_VALIDATE_ACTIVE},
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{ "backup", BOND_ARP_VALIDATE_BACKUP},
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{ "all", BOND_ARP_VALIDATE_ALL},
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{ NULL, -1},
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};
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/*-------------------------- Forward declarations ---------------------------*/
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static void bond_send_gratuitous_arp(struct bonding *bond);
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static void bond_deinit(struct net_device *bond_dev);
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/*---------------------------- General routines -----------------------------*/
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static const char *bond_mode_name(int mode)
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{
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switch (mode) {
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case BOND_MODE_ROUNDROBIN :
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return "load balancing (round-robin)";
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case BOND_MODE_ACTIVEBACKUP :
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return "fault-tolerance (active-backup)";
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case BOND_MODE_XOR :
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return "load balancing (xor)";
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case BOND_MODE_BROADCAST :
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return "fault-tolerance (broadcast)";
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case BOND_MODE_8023AD:
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return "IEEE 802.3ad Dynamic link aggregation";
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case BOND_MODE_TLB:
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return "transmit load balancing";
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case BOND_MODE_ALB:
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return "adaptive load balancing";
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default:
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return "unknown";
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}
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}
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/*---------------------------------- VLAN -----------------------------------*/
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/**
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* bond_add_vlan - add a new vlan id on bond
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* @bond: bond that got the notification
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* @vlan_id: the vlan id to add
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*
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* Returns -ENOMEM if allocation failed.
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*/
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static int bond_add_vlan(struct bonding *bond, unsigned short vlan_id)
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{
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struct vlan_entry *vlan;
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dprintk("bond: %s, vlan id %d\n",
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(bond ? bond->dev->name: "None"), vlan_id);
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vlan = kmalloc(sizeof(struct vlan_entry), GFP_KERNEL);
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if (!vlan) {
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return -ENOMEM;
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}
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INIT_LIST_HEAD(&vlan->vlan_list);
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vlan->vlan_id = vlan_id;
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vlan->vlan_ip = 0;
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write_lock_bh(&bond->lock);
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list_add_tail(&vlan->vlan_list, &bond->vlan_list);
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write_unlock_bh(&bond->lock);
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dprintk("added VLAN ID %d on bond %s\n", vlan_id, bond->dev->name);
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return 0;
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}
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/**
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* bond_del_vlan - delete a vlan id from bond
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* @bond: bond that got the notification
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* @vlan_id: the vlan id to delete
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*
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* returns -ENODEV if @vlan_id was not found in @bond.
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*/
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static int bond_del_vlan(struct bonding *bond, unsigned short vlan_id)
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{
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struct vlan_entry *vlan, *next;
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int res = -ENODEV;
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dprintk("bond: %s, vlan id %d\n", bond->dev->name, vlan_id);
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write_lock_bh(&bond->lock);
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list_for_each_entry_safe(vlan, next, &bond->vlan_list, vlan_list) {
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if (vlan->vlan_id == vlan_id) {
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list_del(&vlan->vlan_list);
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if ((bond->params.mode == BOND_MODE_TLB) ||
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(bond->params.mode == BOND_MODE_ALB)) {
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bond_alb_clear_vlan(bond, vlan_id);
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}
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dprintk("removed VLAN ID %d from bond %s\n", vlan_id,
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bond->dev->name);
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kfree(vlan);
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if (list_empty(&bond->vlan_list) &&
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(bond->slave_cnt == 0)) {
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/* Last VLAN removed and no slaves, so
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* restore block on adding VLANs. This will
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* be removed once new slaves that are not
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* VLAN challenged will be added.
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*/
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bond->dev->features |= NETIF_F_VLAN_CHALLENGED;
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}
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res = 0;
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goto out;
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}
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}
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dprintk("couldn't find VLAN ID %d in bond %s\n", vlan_id,
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bond->dev->name);
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out:
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write_unlock_bh(&bond->lock);
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return res;
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}
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/**
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* bond_has_challenged_slaves
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* @bond: the bond we're working on
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*
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* Searches the slave list. Returns 1 if a vlan challenged slave
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* was found, 0 otherwise.
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*
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* Assumes bond->lock is held.
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*/
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static int bond_has_challenged_slaves(struct bonding *bond)
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{
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struct slave *slave;
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int i;
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bond_for_each_slave(bond, slave, i) {
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if (slave->dev->features & NETIF_F_VLAN_CHALLENGED) {
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dprintk("found VLAN challenged slave - %s\n",
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slave->dev->name);
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return 1;
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}
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}
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dprintk("no VLAN challenged slaves found\n");
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return 0;
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}
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/**
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* bond_next_vlan - safely skip to the next item in the vlans list.
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* @bond: the bond we're working on
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* @curr: item we're advancing from
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*
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* Returns %NULL if list is empty, bond->next_vlan if @curr is %NULL,
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* or @curr->next otherwise (even if it is @curr itself again).
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*
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* Caller must hold bond->lock
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*/
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struct vlan_entry *bond_next_vlan(struct bonding *bond, struct vlan_entry *curr)
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{
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struct vlan_entry *next, *last;
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if (list_empty(&bond->vlan_list)) {
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return NULL;
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}
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if (!curr) {
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next = list_entry(bond->vlan_list.next,
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struct vlan_entry, vlan_list);
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} else {
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last = list_entry(bond->vlan_list.prev,
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struct vlan_entry, vlan_list);
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if (last == curr) {
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next = list_entry(bond->vlan_list.next,
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struct vlan_entry, vlan_list);
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} else {
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next = list_entry(curr->vlan_list.next,
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struct vlan_entry, vlan_list);
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}
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}
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return next;
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}
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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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* When the bond gets an skb to transmit that is
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* already hardware accelerated VLAN tagged, and it
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* needs to relay this skb to a slave that is not
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* hw accel capable, the skb needs to be "unaccelerated",
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* i.e. strip the hwaccel tag and re-insert it as part
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* of the payload.
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*/
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int bond_dev_queue_xmit(struct bonding *bond, struct sk_buff *skb, struct net_device *slave_dev)
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{
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unsigned short uninitialized_var(vlan_id);
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if (!list_empty(&bond->vlan_list) &&
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!(slave_dev->features & NETIF_F_HW_VLAN_TX) &&
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vlan_get_tag(skb, &vlan_id) == 0) {
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skb->dev = slave_dev;
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skb = vlan_put_tag(skb, vlan_id);
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if (!skb) {
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/* vlan_put_tag() frees the skb in case of error,
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* so return success here so the calling functions
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* won't attempt to free is again.
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*/
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return 0;
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}
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} else {
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skb->dev = slave_dev;
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}
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skb->priority = 1;
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dev_queue_xmit(skb);
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return 0;
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}
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/*
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* In the following 3 functions, bond_vlan_rx_register(), bond_vlan_rx_add_vid
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* and bond_vlan_rx_kill_vid, We don't protect the slave list iteration with a
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* 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_register - Propagates registration to slaves
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* @bond_dev: bonding net device that got called
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* @grp: vlan group being registered
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*/
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static void bond_vlan_rx_register(struct net_device *bond_dev, struct vlan_group *grp)
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{
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struct bonding *bond = bond_dev->priv;
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struct slave *slave;
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int i;
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bond->vlgrp = grp;
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bond_for_each_slave(bond, slave, i) {
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struct net_device *slave_dev = slave->dev;
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if ((slave_dev->features & NETIF_F_HW_VLAN_RX) &&
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slave_dev->vlan_rx_register) {
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slave_dev->vlan_rx_register(slave_dev, grp);
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}
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}
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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 void bond_vlan_rx_add_vid(struct net_device *bond_dev, uint16_t vid)
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{
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struct bonding *bond = bond_dev->priv;
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struct slave *slave;
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int i, res;
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bond_for_each_slave(bond, slave, i) {
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struct net_device *slave_dev = slave->dev;
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if ((slave_dev->features & NETIF_F_HW_VLAN_FILTER) &&
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slave_dev->vlan_rx_add_vid) {
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slave_dev->vlan_rx_add_vid(slave_dev, vid);
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}
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}
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res = bond_add_vlan(bond, vid);
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if (res) {
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printk(KERN_ERR DRV_NAME
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": %s: Error: Failed to add vlan id %d\n",
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bond_dev->name, vid);
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}
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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 void bond_vlan_rx_kill_vid(struct net_device *bond_dev, uint16_t vid)
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{
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struct bonding *bond = bond_dev->priv;
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struct slave *slave;
|
|
struct net_device *vlan_dev;
|
|
int i, res;
|
|
|
|
bond_for_each_slave(bond, slave, i) {
|
|
struct net_device *slave_dev = slave->dev;
|
|
|
|
if ((slave_dev->features & NETIF_F_HW_VLAN_FILTER) &&
|
|
slave_dev->vlan_rx_kill_vid) {
|
|
/* Save and then restore vlan_dev in the grp array,
|
|
* since the slave's driver might clear it.
|
|
*/
|
|
vlan_dev = vlan_group_get_device(bond->vlgrp, vid);
|
|
slave_dev->vlan_rx_kill_vid(slave_dev, vid);
|
|
vlan_group_set_device(bond->vlgrp, vid, vlan_dev);
|
|
}
|
|
}
|
|
|
|
res = bond_del_vlan(bond, vid);
|
|
if (res) {
|
|
printk(KERN_ERR DRV_NAME
|
|
": %s: Error: Failed to remove vlan id %d\n",
|
|
bond_dev->name, vid);
|
|
}
|
|
}
|
|
|
|
static void bond_add_vlans_on_slave(struct bonding *bond, struct net_device *slave_dev)
|
|
{
|
|
struct vlan_entry *vlan;
|
|
|
|
write_lock_bh(&bond->lock);
|
|
|
|
if (list_empty(&bond->vlan_list)) {
|
|
goto out;
|
|
}
|
|
|
|
if ((slave_dev->features & NETIF_F_HW_VLAN_RX) &&
|
|
slave_dev->vlan_rx_register) {
|
|
slave_dev->vlan_rx_register(slave_dev, bond->vlgrp);
|
|
}
|
|
|
|
if (!(slave_dev->features & NETIF_F_HW_VLAN_FILTER) ||
|
|
!(slave_dev->vlan_rx_add_vid)) {
|
|
goto out;
|
|
}
|
|
|
|
list_for_each_entry(vlan, &bond->vlan_list, vlan_list) {
|
|
slave_dev->vlan_rx_add_vid(slave_dev, vlan->vlan_id);
|
|
}
|
|
|
|
out:
|
|
write_unlock_bh(&bond->lock);
|
|
}
|
|
|
|
static void bond_del_vlans_from_slave(struct bonding *bond, struct net_device *slave_dev)
|
|
{
|
|
struct vlan_entry *vlan;
|
|
struct net_device *vlan_dev;
|
|
|
|
write_lock_bh(&bond->lock);
|
|
|
|
if (list_empty(&bond->vlan_list)) {
|
|
goto out;
|
|
}
|
|
|
|
if (!(slave_dev->features & NETIF_F_HW_VLAN_FILTER) ||
|
|
!(slave_dev->vlan_rx_kill_vid)) {
|
|
goto unreg;
|
|
}
|
|
|
|
list_for_each_entry(vlan, &bond->vlan_list, vlan_list) {
|
|
/* Save and then restore vlan_dev in the grp array,
|
|
* since the slave's driver might clear it.
|
|
*/
|
|
vlan_dev = vlan_group_get_device(bond->vlgrp, vlan->vlan_id);
|
|
slave_dev->vlan_rx_kill_vid(slave_dev, vlan->vlan_id);
|
|
vlan_group_set_device(bond->vlgrp, vlan->vlan_id, vlan_dev);
|
|
}
|
|
|
|
unreg:
|
|
if ((slave_dev->features & NETIF_F_HW_VLAN_RX) &&
|
|
slave_dev->vlan_rx_register) {
|
|
slave_dev->vlan_rx_register(slave_dev, NULL);
|
|
}
|
|
|
|
out:
|
|
write_unlock_bh(&bond->lock);
|
|
}
|
|
|
|
/*------------------------------- Link status -------------------------------*/
|
|
|
|
/*
|
|
* Set the carrier state for the master according to the state of its
|
|
* slaves. If any slaves are up, the master is up. In 802.3ad mode,
|
|
* do special 802.3ad magic.
|
|
*
|
|
* Returns zero if carrier state does not change, nonzero if it does.
|
|
*/
|
|
static int bond_set_carrier(struct bonding *bond)
|
|
{
|
|
struct slave *slave;
|
|
int i;
|
|
|
|
if (bond->slave_cnt == 0)
|
|
goto down;
|
|
|
|
if (bond->params.mode == BOND_MODE_8023AD)
|
|
return bond_3ad_set_carrier(bond);
|
|
|
|
bond_for_each_slave(bond, slave, i) {
|
|
if (slave->link == BOND_LINK_UP) {
|
|
if (!netif_carrier_ok(bond->dev)) {
|
|
netif_carrier_on(bond->dev);
|
|
return 1;
|
|
}
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
down:
|
|
if (netif_carrier_ok(bond->dev)) {
|
|
netif_carrier_off(bond->dev);
|
|
return 1;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Get link speed and duplex from the slave's base driver
|
|
* using ethtool. If for some reason the call fails or the
|
|
* values are invalid, fake speed and duplex to 100/Full
|
|
* and return error.
|
|
*/
|
|
static int bond_update_speed_duplex(struct slave *slave)
|
|
{
|
|
struct net_device *slave_dev = slave->dev;
|
|
struct ethtool_cmd etool;
|
|
int res;
|
|
|
|
/* Fake speed and duplex */
|
|
slave->speed = SPEED_100;
|
|
slave->duplex = DUPLEX_FULL;
|
|
|
|
if (!slave_dev->ethtool_ops || !slave_dev->ethtool_ops->get_settings)
|
|
return -1;
|
|
|
|
res = slave_dev->ethtool_ops->get_settings(slave_dev, &etool);
|
|
if (res < 0)
|
|
return -1;
|
|
|
|
switch (etool.speed) {
|
|
case SPEED_10:
|
|
case SPEED_100:
|
|
case SPEED_1000:
|
|
case SPEED_10000:
|
|
break;
|
|
default:
|
|
return -1;
|
|
}
|
|
|
|
switch (etool.duplex) {
|
|
case DUPLEX_FULL:
|
|
case DUPLEX_HALF:
|
|
break;
|
|
default:
|
|
return -1;
|
|
}
|
|
|
|
slave->speed = etool.speed;
|
|
slave->duplex = etool.duplex;
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* if <dev> supports MII link status reporting, check its link status.
|
|
*
|
|
* We either do MII/ETHTOOL ioctls, or check netif_carrier_ok(),
|
|
* depening upon the setting of the use_carrier parameter.
|
|
*
|
|
* Return either BMSR_LSTATUS, meaning that the link is up (or we
|
|
* can't tell and just pretend it is), or 0, meaning that the link is
|
|
* down.
|
|
*
|
|
* If reporting is non-zero, instead of faking link up, return -1 if
|
|
* both ETHTOOL and MII ioctls fail (meaning the device does not
|
|
* support them). If use_carrier is set, return whatever it says.
|
|
* It'd be nice if there was a good way to tell if a driver supports
|
|
* netif_carrier, but there really isn't.
|
|
*/
|
|
static int bond_check_dev_link(struct bonding *bond, struct net_device *slave_dev, int reporting)
|
|
{
|
|
static int (* ioctl)(struct net_device *, struct ifreq *, int);
|
|
struct ifreq ifr;
|
|
struct mii_ioctl_data *mii;
|
|
|
|
if (bond->params.use_carrier) {
|
|
return netif_carrier_ok(slave_dev) ? BMSR_LSTATUS : 0;
|
|
}
|
|
|
|
ioctl = slave_dev->do_ioctl;
|
|
if (ioctl) {
|
|
/* TODO: set pointer to correct ioctl on a per team member */
|
|
/* bases to make this more efficient. that is, once */
|
|
/* we determine the correct ioctl, we will always */
|
|
/* call it and not the others for that team */
|
|
/* member. */
|
|
|
|
/*
|
|
* We cannot assume that SIOCGMIIPHY will also read a
|
|
* register; not all network drivers (e.g., e100)
|
|
* support that.
|
|
*/
|
|
|
|
/* Yes, the mii is overlaid on the ifreq.ifr_ifru */
|
|
strncpy(ifr.ifr_name, slave_dev->name, IFNAMSIZ);
|
|
mii = if_mii(&ifr);
|
|
if (IOCTL(slave_dev, &ifr, SIOCGMIIPHY) == 0) {
|
|
mii->reg_num = MII_BMSR;
|
|
if (IOCTL(slave_dev, &ifr, SIOCGMIIREG) == 0) {
|
|
return (mii->val_out & BMSR_LSTATUS);
|
|
}
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Some drivers cache ETHTOOL_GLINK for a period of time so we only
|
|
* attempt to get link status from it if the above MII ioctls fail.
|
|
*/
|
|
if (slave_dev->ethtool_ops) {
|
|
if (slave_dev->ethtool_ops->get_link) {
|
|
u32 link;
|
|
|
|
link = slave_dev->ethtool_ops->get_link(slave_dev);
|
|
|
|
return link ? BMSR_LSTATUS : 0;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* 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 ------------------------------*/
|
|
|
|
/*
|
|
* Returns 0 if dmi1 and dmi2 are the same, non-0 otherwise
|
|
*/
|
|
static inline int bond_is_dmi_same(struct dev_mc_list *dmi1, struct dev_mc_list *dmi2)
|
|
{
|
|
return memcmp(dmi1->dmi_addr, dmi2->dmi_addr, dmi1->dmi_addrlen) == 0 &&
|
|
dmi1->dmi_addrlen == dmi2->dmi_addrlen;
|
|
}
|
|
|
|
/*
|
|
* returns dmi entry if found, NULL otherwise
|
|
*/
|
|
static struct dev_mc_list *bond_mc_list_find_dmi(struct dev_mc_list *dmi, struct dev_mc_list *mc_list)
|
|
{
|
|
struct dev_mc_list *idmi;
|
|
|
|
for (idmi = mc_list; idmi; idmi = idmi->next) {
|
|
if (bond_is_dmi_same(dmi, idmi)) {
|
|
return idmi;
|
|
}
|
|
}
|
|
|
|
return NULL;
|
|
}
|
|
|
|
/*
|
|
* Push the promiscuity flag down to appropriate slaves
|
|
*/
|
|
static void bond_set_promiscuity(struct bonding *bond, int inc)
|
|
{
|
|
if (USES_PRIMARY(bond->params.mode)) {
|
|
/* write lock already acquired */
|
|
if (bond->curr_active_slave) {
|
|
dev_set_promiscuity(bond->curr_active_slave->dev, inc);
|
|
}
|
|
} else {
|
|
struct slave *slave;
|
|
int i;
|
|
bond_for_each_slave(bond, slave, i) {
|
|
dev_set_promiscuity(slave->dev, inc);
|
|
}
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Push the allmulti flag down to all slaves
|
|
*/
|
|
static void bond_set_allmulti(struct bonding *bond, int inc)
|
|
{
|
|
if (USES_PRIMARY(bond->params.mode)) {
|
|
/* write lock already acquired */
|
|
if (bond->curr_active_slave) {
|
|
dev_set_allmulti(bond->curr_active_slave->dev, inc);
|
|
}
|
|
} else {
|
|
struct slave *slave;
|
|
int i;
|
|
bond_for_each_slave(bond, slave, i) {
|
|
dev_set_allmulti(slave->dev, inc);
|
|
}
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Add a Multicast address to slaves
|
|
* according to mode
|
|
*/
|
|
static void bond_mc_add(struct bonding *bond, void *addr, int alen)
|
|
{
|
|
if (USES_PRIMARY(bond->params.mode)) {
|
|
/* write lock already acquired */
|
|
if (bond->curr_active_slave) {
|
|
dev_mc_add(bond->curr_active_slave->dev, addr, alen, 0);
|
|
}
|
|
} else {
|
|
struct slave *slave;
|
|
int i;
|
|
bond_for_each_slave(bond, slave, i) {
|
|
dev_mc_add(slave->dev, addr, alen, 0);
|
|
}
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Remove a multicast address from slave
|
|
* according to mode
|
|
*/
|
|
static void bond_mc_delete(struct bonding *bond, void *addr, int alen)
|
|
{
|
|
if (USES_PRIMARY(bond->params.mode)) {
|
|
/* write lock already acquired */
|
|
if (bond->curr_active_slave) {
|
|
dev_mc_delete(bond->curr_active_slave->dev, addr, alen, 0);
|
|
}
|
|
} else {
|
|
struct slave *slave;
|
|
int i;
|
|
bond_for_each_slave(bond, slave, i) {
|
|
dev_mc_delete(slave->dev, addr, alen, 0);
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
/*
|
|
* 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(struct bonding *bond)
|
|
{
|
|
struct in_device *in_dev;
|
|
struct ip_mc_list *im;
|
|
|
|
rcu_read_lock();
|
|
in_dev = __in_dev_get_rcu(bond->dev);
|
|
if (in_dev) {
|
|
for (im = in_dev->mc_list; im; im = im->next) {
|
|
ip_mc_rejoin_group(im);
|
|
}
|
|
}
|
|
|
|
rcu_read_unlock();
|
|
}
|
|
|
|
/*
|
|
* Totally destroys the mc_list in bond
|
|
*/
|
|
static void bond_mc_list_destroy(struct bonding *bond)
|
|
{
|
|
struct dev_mc_list *dmi;
|
|
|
|
dmi = bond->mc_list;
|
|
while (dmi) {
|
|
bond->mc_list = dmi->next;
|
|
kfree(dmi);
|
|
dmi = bond->mc_list;
|
|
}
|
|
bond->mc_list = NULL;
|
|
}
|
|
|
|
/*
|
|
* Copy all the Multicast addresses from src to the bonding device dst
|
|
*/
|
|
static int bond_mc_list_copy(struct dev_mc_list *mc_list, struct bonding *bond,
|
|
gfp_t gfp_flag)
|
|
{
|
|
struct dev_mc_list *dmi, *new_dmi;
|
|
|
|
for (dmi = mc_list; dmi; dmi = dmi->next) {
|
|
new_dmi = kmalloc(sizeof(struct dev_mc_list), gfp_flag);
|
|
|
|
if (!new_dmi) {
|
|
/* FIXME: Potential memory leak !!! */
|
|
return -ENOMEM;
|
|
}
|
|
|
|
new_dmi->next = bond->mc_list;
|
|
bond->mc_list = new_dmi;
|
|
new_dmi->dmi_addrlen = dmi->dmi_addrlen;
|
|
memcpy(new_dmi->dmi_addr, dmi->dmi_addr, dmi->dmi_addrlen);
|
|
new_dmi->dmi_users = dmi->dmi_users;
|
|
new_dmi->dmi_gusers = dmi->dmi_gusers;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* flush all members of flush->mc_list from device dev->mc_list
|
|
*/
|
|
static void bond_mc_list_flush(struct net_device *bond_dev, struct net_device *slave_dev)
|
|
{
|
|
struct bonding *bond = bond_dev->priv;
|
|
struct dev_mc_list *dmi;
|
|
|
|
for (dmi = bond_dev->mc_list; dmi; dmi = dmi->next) {
|
|
dev_mc_delete(slave_dev, dmi->dmi_addr, dmi->dmi_addrlen, 0);
|
|
}
|
|
|
|
if (bond->params.mode == BOND_MODE_8023AD) {
|
|
/* del lacpdu mc addr from mc list */
|
|
u8 lacpdu_multicast[ETH_ALEN] = MULTICAST_LACPDU_ADDR;
|
|
|
|
dev_mc_delete(slave_dev, lacpdu_multicast, ETH_ALEN, 0);
|
|
}
|
|
}
|
|
|
|
/*--------------------------- Active slave change ---------------------------*/
|
|
|
|
/*
|
|
* Update the mc list and multicast-related flags for the new and
|
|
* old active slaves (if any) according to the multicast mode, and
|
|
* promiscuous flags unconditionally.
|
|
*/
|
|
static void bond_mc_swap(struct bonding *bond, struct slave *new_active, struct slave *old_active)
|
|
{
|
|
struct dev_mc_list *dmi;
|
|
|
|
if (!USES_PRIMARY(bond->params.mode)) {
|
|
/* nothing to do - mc list is already up-to-date on
|
|
* all slaves
|
|
*/
|
|
return;
|
|
}
|
|
|
|
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);
|
|
}
|
|
|
|
for (dmi = bond->dev->mc_list; dmi; dmi = dmi->next) {
|
|
dev_mc_delete(old_active->dev, dmi->dmi_addr, dmi->dmi_addrlen, 0);
|
|
}
|
|
}
|
|
|
|
if (new_active) {
|
|
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);
|
|
}
|
|
|
|
for (dmi = bond->dev->mc_list; dmi; dmi = dmi->next) {
|
|
dev_mc_add(new_active->dev, dmi->dmi_addr, dmi->dmi_addrlen, 0);
|
|
}
|
|
bond_resend_igmp_join_requests(bond);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* find_best_interface - select the best available slave to be the active one
|
|
* @bond: our bonding struct
|
|
*
|
|
* Warning: Caller must hold curr_slave_lock for writing.
|
|
*/
|
|
static struct slave *bond_find_best_slave(struct bonding *bond)
|
|
{
|
|
struct slave *new_active, *old_active;
|
|
struct slave *bestslave = NULL;
|
|
int mintime = bond->params.updelay;
|
|
int i;
|
|
|
|
new_active = old_active = bond->curr_active_slave;
|
|
|
|
if (!new_active) { /* there were no active slaves left */
|
|
if (bond->slave_cnt > 0) { /* found one slave */
|
|
new_active = bond->first_slave;
|
|
} else {
|
|
return NULL; /* still no slave, return NULL */
|
|
}
|
|
}
|
|
|
|
/* first try the primary link; if arping, a link must tx/rx traffic
|
|
* before it can be considered the curr_active_slave - also, we would skip
|
|
* slaves between the curr_active_slave and primary_slave that may be up
|
|
* and able to arp
|
|
*/
|
|
if ((bond->primary_slave) &&
|
|
(!bond->params.arp_interval) &&
|
|
(IS_UP(bond->primary_slave->dev))) {
|
|
new_active = bond->primary_slave;
|
|
}
|
|
|
|
/* remember where to stop iterating over the slaves */
|
|
old_active = new_active;
|
|
|
|
bond_for_each_slave_from(bond, new_active, i, old_active) {
|
|
if (IS_UP(new_active->dev)) {
|
|
if (new_active->link == BOND_LINK_UP) {
|
|
return new_active;
|
|
} else if (new_active->link == BOND_LINK_BACK) {
|
|
/* link up, but waiting for stabilization */
|
|
if (new_active->delay < mintime) {
|
|
mintime = new_active->delay;
|
|
bestslave = new_active;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
return bestslave;
|
|
}
|
|
|
|
/**
|
|
* 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.
|
|
*
|
|
* Warning: Caller must hold curr_slave_lock for writing.
|
|
*/
|
|
void bond_change_active_slave(struct bonding *bond, struct slave *new_active)
|
|
{
|
|
struct slave *old_active = bond->curr_active_slave;
|
|
|
|
if (old_active == new_active) {
|
|
return;
|
|
}
|
|
|
|
if (new_active) {
|
|
if (new_active->link == BOND_LINK_BACK) {
|
|
if (USES_PRIMARY(bond->params.mode)) {
|
|
printk(KERN_INFO DRV_NAME
|
|
": %s: making interface %s the new "
|
|
"active one %d ms earlier.\n",
|
|
bond->dev->name, new_active->dev->name,
|
|
(bond->params.updelay - new_active->delay) * bond->params.miimon);
|
|
}
|
|
|
|
new_active->delay = 0;
|
|
new_active->link = BOND_LINK_UP;
|
|
new_active->jiffies = jiffies;
|
|
|
|
if (bond->params.mode == BOND_MODE_8023AD) {
|
|
bond_3ad_handle_link_change(new_active, BOND_LINK_UP);
|
|
}
|
|
|
|
if ((bond->params.mode == BOND_MODE_TLB) ||
|
|
(bond->params.mode == BOND_MODE_ALB)) {
|
|
bond_alb_handle_link_change(bond, new_active, BOND_LINK_UP);
|
|
}
|
|
} else {
|
|
if (USES_PRIMARY(bond->params.mode)) {
|
|
printk(KERN_INFO DRV_NAME
|
|
": %s: making interface %s the new "
|
|
"active one.\n",
|
|
bond->dev->name, new_active->dev->name);
|
|
}
|
|
}
|
|
}
|
|
|
|
if (USES_PRIMARY(bond->params.mode)) {
|
|
bond_mc_swap(bond, new_active, old_active);
|
|
}
|
|
|
|
if ((bond->params.mode == BOND_MODE_TLB) ||
|
|
(bond->params.mode == BOND_MODE_ALB)) {
|
|
bond_alb_handle_active_change(bond, new_active);
|
|
if (old_active)
|
|
bond_set_slave_inactive_flags(old_active);
|
|
if (new_active)
|
|
bond_set_slave_active_flags(new_active);
|
|
} else {
|
|
bond->curr_active_slave = new_active;
|
|
}
|
|
|
|
if (bond->params.mode == BOND_MODE_ACTIVEBACKUP) {
|
|
if (old_active) {
|
|
bond_set_slave_inactive_flags(old_active);
|
|
}
|
|
|
|
if (new_active) {
|
|
bond_set_slave_active_flags(new_active);
|
|
}
|
|
|
|
/* when bonding does not set the slave MAC address, the bond MAC
|
|
* address is the one of the active slave.
|
|
*/
|
|
if (new_active && bond->params.fail_over_mac)
|
|
memcpy(bond->dev->dev_addr, new_active->dev->dev_addr,
|
|
new_active->dev->addr_len);
|
|
if (bond->curr_active_slave &&
|
|
test_bit(__LINK_STATE_LINKWATCH_PENDING,
|
|
&bond->curr_active_slave->dev->state)) {
|
|
dprintk("delaying gratuitous arp on %s\n",
|
|
bond->curr_active_slave->dev->name);
|
|
bond->send_grat_arp = 1;
|
|
} else
|
|
bond_send_gratuitous_arp(bond);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* bond_select_active_slave - select a new active slave, if needed
|
|
* @bond: our bonding struct
|
|
*
|
|
* This functions shoud 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.
|
|
*
|
|
* Warning: Caller must hold curr_slave_lock for writing.
|
|
*/
|
|
void bond_select_active_slave(struct bonding *bond)
|
|
{
|
|
struct slave *best_slave;
|
|
int rv;
|
|
|
|
best_slave = bond_find_best_slave(bond);
|
|
if (best_slave != 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)) {
|
|
printk(KERN_INFO DRV_NAME
|
|
": %s: first active interface up!\n",
|
|
bond->dev->name);
|
|
} else {
|
|
printk(KERN_INFO DRV_NAME ": %s: "
|
|
"now running without any active interface !\n",
|
|
bond->dev->name);
|
|
}
|
|
}
|
|
}
|
|
|
|
/*--------------------------- slave list handling ---------------------------*/
|
|
|
|
/*
|
|
* This function attaches the slave to the end of list.
|
|
*
|
|
* bond->lock held for writing by caller.
|
|
*/
|
|
static void bond_attach_slave(struct bonding *bond, struct slave *new_slave)
|
|
{
|
|
if (bond->first_slave == NULL) { /* attaching the first slave */
|
|
new_slave->next = new_slave;
|
|
new_slave->prev = new_slave;
|
|
bond->first_slave = new_slave;
|
|
} else {
|
|
new_slave->next = bond->first_slave;
|
|
new_slave->prev = bond->first_slave->prev;
|
|
new_slave->next->prev = new_slave;
|
|
new_slave->prev->next = new_slave;
|
|
}
|
|
|
|
bond->slave_cnt++;
|
|
}
|
|
|
|
/*
|
|
* This function detaches the slave from the list.
|
|
* WARNING: no check is made to verify if the slave effectively
|
|
* belongs to <bond>.
|
|
* Nothing is freed on return, structures are just unchained.
|
|
* If any slave pointer in bond was pointing to <slave>,
|
|
* it should be changed by the calling function.
|
|
*
|
|
* bond->lock held for writing by caller.
|
|
*/
|
|
static void bond_detach_slave(struct bonding *bond, struct slave *slave)
|
|
{
|
|
if (slave->next) {
|
|
slave->next->prev = slave->prev;
|
|
}
|
|
|
|
if (slave->prev) {
|
|
slave->prev->next = slave->next;
|
|
}
|
|
|
|
if (bond->first_slave == slave) { /* slave is the first slave */
|
|
if (bond->slave_cnt > 1) { /* there are more slave */
|
|
bond->first_slave = slave->next;
|
|
} else {
|
|
bond->first_slave = NULL; /* slave was the last one */
|
|
}
|
|
}
|
|
|
|
slave->next = NULL;
|
|
slave->prev = NULL;
|
|
bond->slave_cnt--;
|
|
}
|
|
|
|
/*---------------------------------- IOCTL ----------------------------------*/
|
|
|
|
static int bond_sethwaddr(struct net_device *bond_dev,
|
|
struct net_device *slave_dev)
|
|
{
|
|
dprintk("bond_dev=%p\n", bond_dev);
|
|
dprintk("slave_dev=%p\n", slave_dev);
|
|
dprintk("slave_dev->addr_len=%d\n", slave_dev->addr_len);
|
|
memcpy(bond_dev->dev_addr, slave_dev->dev_addr, slave_dev->addr_len);
|
|
return 0;
|
|
}
|
|
|
|
#define BOND_VLAN_FEATURES \
|
|
(NETIF_F_VLAN_CHALLENGED | NETIF_F_HW_VLAN_RX | NETIF_F_HW_VLAN_TX | \
|
|
NETIF_F_HW_VLAN_FILTER)
|
|
|
|
/*
|
|
* Compute the common dev->feature set available to all slaves. Some
|
|
* feature bits are managed elsewhere, so preserve those feature bits
|
|
* on the master device.
|
|
*/
|
|
static int bond_compute_features(struct bonding *bond)
|
|
{
|
|
struct slave *slave;
|
|
struct net_device *bond_dev = bond->dev;
|
|
unsigned long features = bond_dev->features;
|
|
unsigned short max_hard_header_len = max((u16)ETH_HLEN,
|
|
bond_dev->hard_header_len);
|
|
int i;
|
|
|
|
features &= ~(NETIF_F_ALL_CSUM | BOND_VLAN_FEATURES);
|
|
features |= NETIF_F_SG | NETIF_F_FRAGLIST | NETIF_F_HIGHDMA |
|
|
NETIF_F_GSO_MASK | NETIF_F_NO_CSUM;
|
|
|
|
bond_for_each_slave(bond, slave, i) {
|
|
features = netdev_compute_features(features,
|
|
slave->dev->features);
|
|
if (slave->dev->hard_header_len > max_hard_header_len)
|
|
max_hard_header_len = slave->dev->hard_header_len;
|
|
}
|
|
|
|
features |= (bond_dev->features & BOND_VLAN_FEATURES);
|
|
bond_dev->features = features;
|
|
bond_dev->hard_header_len = max_hard_header_len;
|
|
|
|
return 0;
|
|
}
|
|
|
|
|
|
static void bond_setup_by_slave(struct net_device *bond_dev,
|
|
struct net_device *slave_dev)
|
|
{
|
|
struct bonding *bond = bond_dev->priv;
|
|
|
|
bond_dev->neigh_setup = slave_dev->neigh_setup;
|
|
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);
|
|
bond->setup_by_slave = 1;
|
|
}
|
|
|
|
/* enslave device <slave> to bond device <master> */
|
|
int bond_enslave(struct net_device *bond_dev, struct net_device *slave_dev)
|
|
{
|
|
struct bonding *bond = bond_dev->priv;
|
|
struct slave *new_slave = NULL;
|
|
struct dev_mc_list *dmi;
|
|
struct sockaddr addr;
|
|
int link_reporting;
|
|
int old_features = bond_dev->features;
|
|
int res = 0;
|
|
|
|
if (!bond->params.use_carrier && slave_dev->ethtool_ops == NULL &&
|
|
slave_dev->do_ioctl == NULL) {
|
|
printk(KERN_WARNING DRV_NAME
|
|
": %s: Warning: no link monitoring support for %s\n",
|
|
bond_dev->name, slave_dev->name);
|
|
}
|
|
|
|
/* bond must be initialized by bond_open() before enslaving */
|
|
if (!(bond_dev->flags & IFF_UP)) {
|
|
printk(KERN_WARNING DRV_NAME
|
|
" %s: master_dev is not up in bond_enslave\n",
|
|
bond_dev->name);
|
|
}
|
|
|
|
/* already enslaved */
|
|
if (slave_dev->flags & IFF_SLAVE) {
|
|
dprintk("Error, Device was already enslaved\n");
|
|
return -EBUSY;
|
|
}
|
|
|
|
/* vlan challenged mutual exclusion */
|
|
/* no need to lock since we're protected by rtnl_lock */
|
|
if (slave_dev->features & NETIF_F_VLAN_CHALLENGED) {
|
|
dprintk("%s: NETIF_F_VLAN_CHALLENGED\n", slave_dev->name);
|
|
if (!list_empty(&bond->vlan_list)) {
|
|
printk(KERN_ERR DRV_NAME
|
|
": %s: Error: cannot enslave VLAN "
|
|
"challenged slave %s on VLAN enabled "
|
|
"bond %s\n", bond_dev->name, slave_dev->name,
|
|
bond_dev->name);
|
|
return -EPERM;
|
|
} else {
|
|
printk(KERN_WARNING DRV_NAME
|
|
": %s: Warning: enslaved VLAN challenged "
|
|
"slave %s. Adding VLANs will be blocked as "
|
|
"long as %s is part of bond %s\n",
|
|
bond_dev->name, slave_dev->name, slave_dev->name,
|
|
bond_dev->name);
|
|
bond_dev->features |= NETIF_F_VLAN_CHALLENGED;
|
|
}
|
|
} else {
|
|
dprintk("%s: ! NETIF_F_VLAN_CHALLENGED\n", slave_dev->name);
|
|
if (bond->slave_cnt == 0) {
|
|
/* First slave, and it is not VLAN challenged,
|
|
* so remove the block of adding VLANs over the bond.
|
|
*/
|
|
bond_dev->features &= ~NETIF_F_VLAN_CHALLENGED;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Old ifenslave binaries are no longer supported. These can
|
|
* be identified with moderate accurary 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)) {
|
|
printk(KERN_ERR DRV_NAME ": %s is up. "
|
|
"This may be due to an out of date ifenslave.\n",
|
|
slave_dev->name);
|
|
res = -EPERM;
|
|
goto err_undo_flags;
|
|
}
|
|
|
|
/* 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->slave_cnt == 0) {
|
|
if (slave_dev->type != ARPHRD_ETHER)
|
|
bond_setup_by_slave(bond_dev, slave_dev);
|
|
} else if (bond_dev->type != slave_dev->type) {
|
|
printk(KERN_ERR DRV_NAME ": %s ether type (%d) is different "
|
|
"from other slaves (%d), can not enslave it.\n",
|
|
slave_dev->name,
|
|
slave_dev->type, bond_dev->type);
|
|
res = -EINVAL;
|
|
goto err_undo_flags;
|
|
}
|
|
|
|
if (slave_dev->set_mac_address == NULL) {
|
|
if (bond->slave_cnt == 0) {
|
|
printk(KERN_WARNING DRV_NAME
|
|
": %s: Warning: The first slave device "
|
|
"specified does not support setting the MAC "
|
|
"address. Enabling the fail_over_mac option.",
|
|
bond_dev->name);
|
|
bond->params.fail_over_mac = 1;
|
|
} else if (!bond->params.fail_over_mac) {
|
|
printk(KERN_ERR DRV_NAME
|
|
": %s: Error: The slave device specified "
|
|
"does not support setting the MAC address, "
|
|
"but fail_over_mac is not enabled.\n"
|
|
, bond_dev->name);
|
|
res = -EOPNOTSUPP;
|
|
goto err_undo_flags;
|
|
}
|
|
}
|
|
|
|
new_slave = kzalloc(sizeof(struct slave), GFP_KERNEL);
|
|
if (!new_slave) {
|
|
res = -ENOMEM;
|
|
goto err_undo_flags;
|
|
}
|
|
|
|
/* save slave's original flags before calling
|
|
* netdev_set_master and dev_open
|
|
*/
|
|
new_slave->original_flags = slave_dev->flags;
|
|
|
|
/*
|
|
* 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
|
|
*/
|
|
memcpy(new_slave->perm_hwaddr, slave_dev->dev_addr, ETH_ALEN);
|
|
|
|
if (!bond->params.fail_over_mac) {
|
|
/*
|
|
* Set slave to master's mac address. The application already
|
|
* set the master's mac address to that of the first slave
|
|
*/
|
|
memcpy(addr.sa_data, bond_dev->dev_addr, bond_dev->addr_len);
|
|
addr.sa_family = slave_dev->type;
|
|
res = dev_set_mac_address(slave_dev, &addr);
|
|
if (res) {
|
|
dprintk("Error %d calling set_mac_address\n", res);
|
|
goto err_free;
|
|
}
|
|
}
|
|
|
|
res = netdev_set_master(slave_dev, bond_dev);
|
|
if (res) {
|
|
dprintk("Error %d calling netdev_set_master\n", res);
|
|
goto err_close;
|
|
}
|
|
/* open the slave since the application closed it */
|
|
res = dev_open(slave_dev);
|
|
if (res) {
|
|
dprintk("Openning slave %s failed\n", slave_dev->name);
|
|
goto err_restore_mac;
|
|
}
|
|
|
|
new_slave->dev = slave_dev;
|
|
slave_dev->priv_flags |= IFF_BONDING;
|
|
|
|
if ((bond->params.mode == BOND_MODE_TLB) ||
|
|
(bond->params.mode == BOND_MODE_ALB)) {
|
|
/* 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_unset_master;
|
|
}
|
|
}
|
|
|
|
/* If the mode USES_PRIMARY, then the new slave gets the
|
|
* master's promisc (and mc) settings only if it becomes the
|
|
* curr_active_slave, and that is taken care of later when calling
|
|
* bond_change_active()
|
|
*/
|
|
if (!USES_PRIMARY(bond->params.mode)) {
|
|
/* set promiscuity level to new slave */
|
|
if (bond_dev->flags & IFF_PROMISC) {
|
|
dev_set_promiscuity(slave_dev, 1);
|
|
}
|
|
|
|
/* set allmulti level to new slave */
|
|
if (bond_dev->flags & IFF_ALLMULTI) {
|
|
dev_set_allmulti(slave_dev, 1);
|
|
}
|
|
|
|
netif_tx_lock_bh(bond_dev);
|
|
/* upload master's mc_list to new slave */
|
|
for (dmi = bond_dev->mc_list; dmi; dmi = dmi->next) {
|
|
dev_mc_add (slave_dev, dmi->dmi_addr, dmi->dmi_addrlen, 0);
|
|
}
|
|
netif_tx_unlock_bh(bond_dev);
|
|
}
|
|
|
|
if (bond->params.mode == 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, ETH_ALEN, 0);
|
|
}
|
|
|
|
bond_add_vlans_on_slave(bond, slave_dev);
|
|
|
|
write_lock_bh(&bond->lock);
|
|
|
|
bond_attach_slave(bond, new_slave);
|
|
|
|
new_slave->delay = 0;
|
|
new_slave->link_failure_count = 0;
|
|
|
|
bond_compute_features(bond);
|
|
|
|
new_slave->last_arp_rx = jiffies;
|
|
|
|
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.
|
|
*/
|
|
printk(KERN_WARNING DRV_NAME
|
|
": %s: Warning: 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",
|
|
bond_dev->name, slave_dev->name);
|
|
} else if (link_reporting == -1) {
|
|
/* unable get link status using mii/ethtool */
|
|
printk(KERN_WARNING DRV_NAME
|
|
": %s: Warning: 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",
|
|
bond_dev->name, slave_dev->name);
|
|
}
|
|
}
|
|
|
|
/* check for initial state */
|
|
if (!bond->params.miimon ||
|
|
(bond_check_dev_link(bond, slave_dev, 0) == BMSR_LSTATUS)) {
|
|
if (bond->params.updelay) {
|
|
dprintk("Initial state of slave_dev is "
|
|
"BOND_LINK_BACK\n");
|
|
new_slave->link = BOND_LINK_BACK;
|
|
new_slave->delay = bond->params.updelay;
|
|
} else {
|
|
dprintk("Initial state of slave_dev is "
|
|
"BOND_LINK_UP\n");
|
|
new_slave->link = BOND_LINK_UP;
|
|
}
|
|
new_slave->jiffies = jiffies;
|
|
} else {
|
|
dprintk("Initial state of slave_dev is "
|
|
"BOND_LINK_DOWN\n");
|
|
new_slave->link = BOND_LINK_DOWN;
|
|
}
|
|
|
|
if (bond_update_speed_duplex(new_slave) &&
|
|
(new_slave->link != BOND_LINK_DOWN)) {
|
|
printk(KERN_WARNING DRV_NAME
|
|
": %s: Warning: failed to get speed and duplex from %s, "
|
|
"assumed to be 100Mb/sec and Full.\n",
|
|
bond_dev->name, new_slave->dev->name);
|
|
|
|
if (bond->params.mode == BOND_MODE_8023AD) {
|
|
printk(KERN_WARNING DRV_NAME
|
|
": %s: Warning: Operation of 802.3ad mode requires ETHTOOL "
|
|
"support in base driver for proper aggregator "
|
|
"selection.\n", bond_dev->name);
|
|
}
|
|
}
|
|
|
|
if (USES_PRIMARY(bond->params.mode) && bond->params.primary[0]) {
|
|
/* if there is a primary slave, remember it */
|
|
if (strcmp(bond->params.primary, new_slave->dev->name) == 0) {
|
|
bond->primary_slave = new_slave;
|
|
}
|
|
}
|
|
|
|
switch (bond->params.mode) {
|
|
case BOND_MODE_ACTIVEBACKUP:
|
|
bond_set_slave_inactive_flags(new_slave);
|
|
bond_select_active_slave(bond);
|
|
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);
|
|
/* if this is the first slave */
|
|
if (bond->slave_cnt == 1) {
|
|
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,
|
|
bond->params.lacp_fast);
|
|
} else {
|
|
SLAVE_AD_INFO(new_slave).id =
|
|
SLAVE_AD_INFO(new_slave->prev).id + 1;
|
|
}
|
|
|
|
bond_3ad_bind_slave(new_slave);
|
|
break;
|
|
case BOND_MODE_TLB:
|
|
case BOND_MODE_ALB:
|
|
new_slave->state = BOND_STATE_ACTIVE;
|
|
bond_set_slave_inactive_flags(new_slave);
|
|
break;
|
|
default:
|
|
dprintk("This slave is always active in trunk mode\n");
|
|
|
|
/* always active in trunk mode */
|
|
new_slave->state = BOND_STATE_ACTIVE;
|
|
|
|
/* 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 (!bond->curr_active_slave) {
|
|
bond->curr_active_slave = new_slave;
|
|
}
|
|
break;
|
|
} /* switch(bond_mode) */
|
|
|
|
bond_set_carrier(bond);
|
|
|
|
write_unlock_bh(&bond->lock);
|
|
|
|
res = bond_create_slave_symlinks(bond_dev, slave_dev);
|
|
if (res)
|
|
goto err_unset_master;
|
|
|
|
printk(KERN_INFO DRV_NAME
|
|
": %s: enslaving %s as a%s interface with a%s link.\n",
|
|
bond_dev->name, slave_dev->name,
|
|
new_slave->state == BOND_STATE_ACTIVE ? "n active" : " backup",
|
|
new_slave->link != BOND_LINK_DOWN ? "n up" : " down");
|
|
|
|
/* enslave is successful */
|
|
return 0;
|
|
|
|
/* Undo stages on error */
|
|
err_unset_master:
|
|
netdev_set_master(slave_dev, NULL);
|
|
|
|
err_close:
|
|
dev_close(slave_dev);
|
|
|
|
err_restore_mac:
|
|
if (!bond->params.fail_over_mac) {
|
|
memcpy(addr.sa_data, new_slave->perm_hwaddr, ETH_ALEN);
|
|
addr.sa_family = slave_dev->type;
|
|
dev_set_mac_address(slave_dev, &addr);
|
|
}
|
|
|
|
err_free:
|
|
kfree(new_slave);
|
|
|
|
err_undo_flags:
|
|
bond_dev->features = old_features;
|
|
|
|
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 write-locked.
|
|
*
|
|
* 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.
|
|
*/
|
|
int bond_release(struct net_device *bond_dev, struct net_device *slave_dev)
|
|
{
|
|
struct bonding *bond = bond_dev->priv;
|
|
struct slave *slave, *oldcurrent;
|
|
struct sockaddr addr;
|
|
int mac_addr_differ;
|
|
DECLARE_MAC_BUF(mac);
|
|
|
|
/* slave is not a slave or master is not master of this slave */
|
|
if (!(slave_dev->flags & IFF_SLAVE) ||
|
|
(slave_dev->master != bond_dev)) {
|
|
printk(KERN_ERR DRV_NAME
|
|
": %s: Error: cannot release %s.\n",
|
|
bond_dev->name, slave_dev->name);
|
|
return -EINVAL;
|
|
}
|
|
|
|
write_lock_bh(&bond->lock);
|
|
|
|
slave = bond_get_slave_by_dev(bond, slave_dev);
|
|
if (!slave) {
|
|
/* not a slave of this bond */
|
|
printk(KERN_INFO DRV_NAME
|
|
": %s: %s not enslaved\n",
|
|
bond_dev->name, slave_dev->name);
|
|
write_unlock_bh(&bond->lock);
|
|
return -EINVAL;
|
|
}
|
|
|
|
mac_addr_differ = memcmp(bond_dev->dev_addr,
|
|
slave->perm_hwaddr,
|
|
ETH_ALEN);
|
|
if (!mac_addr_differ && (bond->slave_cnt > 1)) {
|
|
printk(KERN_WARNING DRV_NAME
|
|
": %s: Warning: the permanent HWaddr of %s - "
|
|
"%s - is still in use by %s. "
|
|
"Set the HWaddr of %s to a different address "
|
|
"to avoid conflicts.\n",
|
|
bond_dev->name,
|
|
slave_dev->name,
|
|
print_mac(mac, slave->perm_hwaddr),
|
|
bond_dev->name,
|
|
slave_dev->name);
|
|
}
|
|
|
|
/* Inform AD package of unbinding of slave. */
|
|
if (bond->params.mode == BOND_MODE_8023AD) {
|
|
/* must be called before the slave is
|
|
* detached from the list
|
|
*/
|
|
bond_3ad_unbind_slave(slave);
|
|
}
|
|
|
|
printk(KERN_INFO DRV_NAME
|
|
": %s: releasing %s interface %s\n",
|
|
bond_dev->name,
|
|
(slave->state == BOND_STATE_ACTIVE)
|
|
? "active" : "backup",
|
|
slave_dev->name);
|
|
|
|
oldcurrent = bond->curr_active_slave;
|
|
|
|
bond->current_arp_slave = NULL;
|
|
|
|
/* release the slave from its bond */
|
|
bond_detach_slave(bond, slave);
|
|
|
|
bond_compute_features(bond);
|
|
|
|
if (bond->primary_slave == slave) {
|
|
bond->primary_slave = NULL;
|
|
}
|
|
|
|
if (oldcurrent == slave) {
|
|
bond_change_active_slave(bond, NULL);
|
|
}
|
|
|
|
if ((bond->params.mode == BOND_MODE_TLB) ||
|
|
(bond->params.mode == BOND_MODE_ALB)) {
|
|
/* 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.
|
|
*/
|
|
write_unlock_bh(&bond->lock);
|
|
bond_alb_deinit_slave(bond, slave);
|
|
write_lock_bh(&bond->lock);
|
|
}
|
|
|
|
if (oldcurrent == slave) {
|
|
/*
|
|
* Note that we hold RTNL over this sequence, so there
|
|
* is no concern that another slave add/remove event
|
|
* will interfere.
|
|
*/
|
|
write_unlock_bh(&bond->lock);
|
|
read_lock(&bond->lock);
|
|
write_lock_bh(&bond->curr_slave_lock);
|
|
|
|
bond_select_active_slave(bond);
|
|
|
|
write_unlock_bh(&bond->curr_slave_lock);
|
|
read_unlock(&bond->lock);
|
|
write_lock_bh(&bond->lock);
|
|
}
|
|
|
|
if (bond->slave_cnt == 0) {
|
|
bond_set_carrier(bond);
|
|
|
|
/* if the last slave was removed, zero the mac address
|
|
* of the master so it will be set by the application
|
|
* to the mac address of the first slave
|
|
*/
|
|
memset(bond_dev->dev_addr, 0, bond_dev->addr_len);
|
|
|
|
if (list_empty(&bond->vlan_list)) {
|
|
bond_dev->features |= NETIF_F_VLAN_CHALLENGED;
|
|
} else {
|
|
printk(KERN_WARNING DRV_NAME
|
|
": %s: Warning: clearing HW address of %s while it "
|
|
"still has VLANs.\n",
|
|
bond_dev->name, bond_dev->name);
|
|
printk(KERN_WARNING DRV_NAME
|
|
": %s: When re-adding slaves, make sure the bond's "
|
|
"HW address matches its VLANs'.\n",
|
|
bond_dev->name);
|
|
}
|
|
} else if ((bond_dev->features & NETIF_F_VLAN_CHALLENGED) &&
|
|
!bond_has_challenged_slaves(bond)) {
|
|
printk(KERN_INFO DRV_NAME
|
|
": %s: last VLAN challenged slave %s "
|
|
"left bond %s. VLAN blocking is removed\n",
|
|
bond_dev->name, slave_dev->name, bond_dev->name);
|
|
bond_dev->features &= ~NETIF_F_VLAN_CHALLENGED;
|
|
}
|
|
|
|
write_unlock_bh(&bond->lock);
|
|
|
|
/* must do this from outside any spinlocks */
|
|
bond_destroy_slave_symlinks(bond_dev, slave_dev);
|
|
|
|
bond_del_vlans_from_slave(bond, slave_dev);
|
|
|
|
/* If the mode USES_PRIMARY, then we should only remove its
|
|
* promisc and mc settings if it was the curr_active_slave, but that was
|
|
* already taken care of above when we detached the slave
|
|
*/
|
|
if (!USES_PRIMARY(bond->params.mode)) {
|
|
/* unset promiscuity level from slave */
|
|
if (bond_dev->flags & IFF_PROMISC) {
|
|
dev_set_promiscuity(slave_dev, -1);
|
|
}
|
|
|
|
/* unset allmulti level from slave */
|
|
if (bond_dev->flags & IFF_ALLMULTI) {
|
|
dev_set_allmulti(slave_dev, -1);
|
|
}
|
|
|
|
/* flush master's mc_list from slave */
|
|
netif_tx_lock_bh(bond_dev);
|
|
bond_mc_list_flush(bond_dev, slave_dev);
|
|
netif_tx_unlock_bh(bond_dev);
|
|
}
|
|
|
|
netdev_set_master(slave_dev, NULL);
|
|
|
|
/* close slave before restoring its mac address */
|
|
dev_close(slave_dev);
|
|
|
|
if (!bond->params.fail_over_mac) {
|
|
/* restore original ("permanent") mac address */
|
|
memcpy(addr.sa_data, slave->perm_hwaddr, ETH_ALEN);
|
|
addr.sa_family = slave_dev->type;
|
|
dev_set_mac_address(slave_dev, &addr);
|
|
}
|
|
|
|
slave_dev->priv_flags &= ~(IFF_MASTER_8023AD | IFF_MASTER_ALB |
|
|
IFF_SLAVE_INACTIVE | IFF_BONDING |
|
|
IFF_SLAVE_NEEDARP);
|
|
|
|
kfree(slave);
|
|
|
|
return 0; /* deletion OK */
|
|
}
|
|
|
|
/*
|
|
* Destroy a bonding device.
|
|
* Must be under rtnl_lock when this function is called.
|
|
*/
|
|
void bond_destroy(struct bonding *bond)
|
|
{
|
|
bond_deinit(bond->dev);
|
|
bond_destroy_sysfs_entry(bond);
|
|
unregister_netdevice(bond->dev);
|
|
}
|
|
|
|
/*
|
|
* First release a slave and than destroy the bond if no more slaves iare left.
|
|
* Must be under rtnl_lock when this function is called.
|
|
*/
|
|
int bond_release_and_destroy(struct net_device *bond_dev, struct net_device *slave_dev)
|
|
{
|
|
struct bonding *bond = bond_dev->priv;
|
|
int ret;
|
|
|
|
ret = bond_release(bond_dev, slave_dev);
|
|
if ((ret == 0) && (bond->slave_cnt == 0)) {
|
|
printk(KERN_INFO DRV_NAME ": %s: destroying bond %s.\n",
|
|
bond_dev->name, bond_dev->name);
|
|
bond_destroy(bond);
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
/*
|
|
* This function releases all slaves.
|
|
*/
|
|
static int bond_release_all(struct net_device *bond_dev)
|
|
{
|
|
struct bonding *bond = bond_dev->priv;
|
|
struct slave *slave;
|
|
struct net_device *slave_dev;
|
|
struct sockaddr addr;
|
|
|
|
write_lock_bh(&bond->lock);
|
|
|
|
netif_carrier_off(bond_dev);
|
|
|
|
if (bond->slave_cnt == 0) {
|
|
goto out;
|
|
}
|
|
|
|
bond->current_arp_slave = NULL;
|
|
bond->primary_slave = NULL;
|
|
bond_change_active_slave(bond, NULL);
|
|
|
|
while ((slave = bond->first_slave) != NULL) {
|
|
/* Inform AD package of unbinding of slave
|
|
* before slave is detached from the list.
|
|
*/
|
|
if (bond->params.mode == BOND_MODE_8023AD) {
|
|
bond_3ad_unbind_slave(slave);
|
|
}
|
|
|
|
slave_dev = slave->dev;
|
|
bond_detach_slave(bond, slave);
|
|
|
|
/* now that the slave is detached, unlock and perform
|
|
* all the undo steps that should not be called from
|
|
* within a lock.
|
|
*/
|
|
write_unlock_bh(&bond->lock);
|
|
|
|
if ((bond->params.mode == BOND_MODE_TLB) ||
|
|
(bond->params.mode == BOND_MODE_ALB)) {
|
|
/* must be called only after the slave
|
|
* has been detached from the list
|
|
*/
|
|
bond_alb_deinit_slave(bond, slave);
|
|
}
|
|
|
|
bond_compute_features(bond);
|
|
|
|
bond_destroy_slave_symlinks(bond_dev, slave_dev);
|
|
bond_del_vlans_from_slave(bond, slave_dev);
|
|
|
|
/* If the mode USES_PRIMARY, then we should only remove its
|
|
* promisc and mc settings if it was the curr_active_slave, but that was
|
|
* already taken care of above when we detached the slave
|
|
*/
|
|
if (!USES_PRIMARY(bond->params.mode)) {
|
|
/* unset promiscuity level from slave */
|
|
if (bond_dev->flags & IFF_PROMISC) {
|
|
dev_set_promiscuity(slave_dev, -1);
|
|
}
|
|
|
|
/* unset allmulti level from slave */
|
|
if (bond_dev->flags & IFF_ALLMULTI) {
|
|
dev_set_allmulti(slave_dev, -1);
|
|
}
|
|
|
|
/* flush master's mc_list from slave */
|
|
netif_tx_lock_bh(bond_dev);
|
|
bond_mc_list_flush(bond_dev, slave_dev);
|
|
netif_tx_unlock_bh(bond_dev);
|
|
}
|
|
|
|
netdev_set_master(slave_dev, NULL);
|
|
|
|
/* close slave before restoring its mac address */
|
|
dev_close(slave_dev);
|
|
|
|
if (!bond->params.fail_over_mac) {
|
|
/* restore original ("permanent") mac address*/
|
|
memcpy(addr.sa_data, slave->perm_hwaddr, ETH_ALEN);
|
|
addr.sa_family = slave_dev->type;
|
|
dev_set_mac_address(slave_dev, &addr);
|
|
}
|
|
|
|
slave_dev->priv_flags &= ~(IFF_MASTER_8023AD | IFF_MASTER_ALB |
|
|
IFF_SLAVE_INACTIVE);
|
|
|
|
kfree(slave);
|
|
|
|
/* re-acquire the lock before getting the next slave */
|
|
write_lock_bh(&bond->lock);
|
|
}
|
|
|
|
/* zero the mac address of the master so it will be
|
|
* set by the application to the mac address of the
|
|
* first slave
|
|
*/
|
|
memset(bond_dev->dev_addr, 0, bond_dev->addr_len);
|
|
|
|
if (list_empty(&bond->vlan_list)) {
|
|
bond_dev->features |= NETIF_F_VLAN_CHALLENGED;
|
|
} else {
|
|
printk(KERN_WARNING DRV_NAME
|
|
": %s: Warning: clearing HW address of %s while it "
|
|
"still has VLANs.\n",
|
|
bond_dev->name, bond_dev->name);
|
|
printk(KERN_WARNING DRV_NAME
|
|
": %s: When re-adding slaves, make sure the bond's "
|
|
"HW address matches its VLANs'.\n",
|
|
bond_dev->name);
|
|
}
|
|
|
|
printk(KERN_INFO DRV_NAME
|
|
": %s: released all slaves\n",
|
|
bond_dev->name);
|
|
|
|
out:
|
|
write_unlock_bh(&bond->lock);
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* This function changes the active slave to slave <slave_dev>.
|
|
* It returns -EINVAL in the following cases.
|
|
* - <slave_dev> is not found in the list.
|
|
* - There is not active slave now.
|
|
* - <slave_dev> is already active.
|
|
* - The link state of <slave_dev> is not BOND_LINK_UP.
|
|
* - <slave_dev> is not running.
|
|
* In these cases, this fuction does nothing.
|
|
* In the other cases, currnt_slave pointer is changed and 0 is returned.
|
|
*/
|
|
static int bond_ioctl_change_active(struct net_device *bond_dev, struct net_device *slave_dev)
|
|
{
|
|
struct bonding *bond = bond_dev->priv;
|
|
struct slave *old_active = NULL;
|
|
struct slave *new_active = NULL;
|
|
int res = 0;
|
|
|
|
if (!USES_PRIMARY(bond->params.mode)) {
|
|
return -EINVAL;
|
|
}
|
|
|
|
/* Verify that master_dev is indeed the master of slave_dev */
|
|
if (!(slave_dev->flags & IFF_SLAVE) ||
|
|
(slave_dev->master != bond_dev)) {
|
|
return -EINVAL;
|
|
}
|
|
|
|
read_lock(&bond->lock);
|
|
|
|
read_lock(&bond->curr_slave_lock);
|
|
old_active = bond->curr_active_slave;
|
|
read_unlock(&bond->curr_slave_lock);
|
|
|
|
new_active = bond_get_slave_by_dev(bond, slave_dev);
|
|
|
|
/*
|
|
* Changing to the current active: do nothing; return success.
|
|
*/
|
|
if (new_active && (new_active == old_active)) {
|
|
read_unlock(&bond->lock);
|
|
return 0;
|
|
}
|
|
|
|
if ((new_active) &&
|
|
(old_active) &&
|
|
(new_active->link == BOND_LINK_UP) &&
|
|
IS_UP(new_active->dev)) {
|
|
write_lock_bh(&bond->curr_slave_lock);
|
|
bond_change_active_slave(bond, new_active);
|
|
write_unlock_bh(&bond->curr_slave_lock);
|
|
} else {
|
|
res = -EINVAL;
|
|
}
|
|
|
|
read_unlock(&bond->lock);
|
|
|
|
return res;
|
|
}
|
|
|
|
static int bond_info_query(struct net_device *bond_dev, struct ifbond *info)
|
|
{
|
|
struct bonding *bond = bond_dev->priv;
|
|
|
|
info->bond_mode = bond->params.mode;
|
|
info->miimon = bond->params.miimon;
|
|
|
|
read_lock(&bond->lock);
|
|
info->num_slaves = bond->slave_cnt;
|
|
read_unlock(&bond->lock);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int bond_slave_info_query(struct net_device *bond_dev, struct ifslave *info)
|
|
{
|
|
struct bonding *bond = bond_dev->priv;
|
|
struct slave *slave;
|
|
int i, found = 0;
|
|
|
|
if (info->slave_id < 0) {
|
|
return -ENODEV;
|
|
}
|
|
|
|
read_lock(&bond->lock);
|
|
|
|
bond_for_each_slave(bond, slave, i) {
|
|
if (i == (int)info->slave_id) {
|
|
found = 1;
|
|
break;
|
|
}
|
|
}
|
|
|
|
read_unlock(&bond->lock);
|
|
|
|
if (found) {
|
|
strcpy(info->slave_name, slave->dev->name);
|
|
info->link = slave->link;
|
|
info->state = slave->state;
|
|
info->link_failure_count = slave->link_failure_count;
|
|
} else {
|
|
return -ENODEV;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*-------------------------------- Monitoring -------------------------------*/
|
|
|
|
/*
|
|
* if !have_locks, return nonzero if a failover is necessary. if
|
|
* have_locks, do whatever failover activities are needed.
|
|
*
|
|
* This is to separate the inspection and failover steps for locking
|
|
* purposes; failover requires rtnl, but acquiring it for every
|
|
* inspection is undesirable, so a wrapper first does inspection, and
|
|
* the acquires the necessary locks and calls again to perform
|
|
* failover if needed. Since all locks are dropped, a complete
|
|
* restart is needed between calls.
|
|
*/
|
|
static int __bond_mii_monitor(struct bonding *bond, int have_locks)
|
|
{
|
|
struct slave *slave, *oldcurrent;
|
|
int do_failover = 0;
|
|
int i;
|
|
|
|
if (bond->slave_cnt == 0)
|
|
goto out;
|
|
|
|
/* we will try to read the link status of each of our slaves, and
|
|
* set their IFF_RUNNING flag appropriately. For each slave not
|
|
* supporting MII status, we won't do anything so that a user-space
|
|
* program could monitor the link itself if needed.
|
|
*/
|
|
|
|
if (bond->send_grat_arp) {
|
|
if (bond->curr_active_slave && test_bit(__LINK_STATE_LINKWATCH_PENDING,
|
|
&bond->curr_active_slave->dev->state))
|
|
dprintk("Needs to send gratuitous arp but not yet\n");
|
|
else {
|
|
dprintk("sending delayed gratuitous arp on on %s\n",
|
|
bond->curr_active_slave->dev->name);
|
|
bond_send_gratuitous_arp(bond);
|
|
bond->send_grat_arp = 0;
|
|
}
|
|
}
|
|
read_lock(&bond->curr_slave_lock);
|
|
oldcurrent = bond->curr_active_slave;
|
|
read_unlock(&bond->curr_slave_lock);
|
|
|
|
bond_for_each_slave(bond, slave, i) {
|
|
struct net_device *slave_dev = slave->dev;
|
|
int link_state;
|
|
u16 old_speed = slave->speed;
|
|
u8 old_duplex = slave->duplex;
|
|
|
|
link_state = bond_check_dev_link(bond, slave_dev, 0);
|
|
|
|
switch (slave->link) {
|
|
case BOND_LINK_UP: /* the link was up */
|
|
if (link_state == BMSR_LSTATUS) {
|
|
if (!oldcurrent) {
|
|
if (!have_locks)
|
|
return 1;
|
|
do_failover = 1;
|
|
}
|
|
break;
|
|
} else { /* link going down */
|
|
slave->link = BOND_LINK_FAIL;
|
|
slave->delay = bond->params.downdelay;
|
|
|
|
if (slave->link_failure_count < UINT_MAX) {
|
|
slave->link_failure_count++;
|
|
}
|
|
|
|
if (bond->params.downdelay) {
|
|
printk(KERN_INFO DRV_NAME
|
|
": %s: link status down for %s "
|
|
"interface %s, disabling it in "
|
|
"%d ms.\n",
|
|
bond->dev->name,
|
|
IS_UP(slave_dev)
|
|
? ((bond->params.mode == BOND_MODE_ACTIVEBACKUP)
|
|
? ((slave == oldcurrent)
|
|
? "active " : "backup ")
|
|
: "")
|
|
: "idle ",
|
|
slave_dev->name,
|
|
bond->params.downdelay * bond->params.miimon);
|
|
}
|
|
}
|
|
/* no break ! fall through the BOND_LINK_FAIL test to
|
|
ensure proper action to be taken
|
|
*/
|
|
case BOND_LINK_FAIL: /* the link has just gone down */
|
|
if (link_state != BMSR_LSTATUS) {
|
|
/* link stays down */
|
|
if (slave->delay <= 0) {
|
|
if (!have_locks)
|
|
return 1;
|
|
|
|
/* link down for too long time */
|
|
slave->link = BOND_LINK_DOWN;
|
|
|
|
/* in active/backup mode, we must
|
|
* completely disable this interface
|
|
*/
|
|
if ((bond->params.mode == BOND_MODE_ACTIVEBACKUP) ||
|
|
(bond->params.mode == BOND_MODE_8023AD)) {
|
|
bond_set_slave_inactive_flags(slave);
|
|
}
|
|
|
|
printk(KERN_INFO DRV_NAME
|
|
": %s: link status definitely "
|
|
"down for interface %s, "
|
|
"disabling it\n",
|
|
bond->dev->name,
|
|
slave_dev->name);
|
|
|
|
/* notify ad that the link status has changed */
|
|
if (bond->params.mode == BOND_MODE_8023AD) {
|
|
bond_3ad_handle_link_change(slave, BOND_LINK_DOWN);
|
|
}
|
|
|
|
if ((bond->params.mode == BOND_MODE_TLB) ||
|
|
(bond->params.mode == BOND_MODE_ALB)) {
|
|
bond_alb_handle_link_change(bond, slave, BOND_LINK_DOWN);
|
|
}
|
|
|
|
if (slave == oldcurrent) {
|
|
do_failover = 1;
|
|
}
|
|
} else {
|
|
slave->delay--;
|
|
}
|
|
} else {
|
|
/* link up again */
|
|
slave->link = BOND_LINK_UP;
|
|
slave->jiffies = jiffies;
|
|
printk(KERN_INFO DRV_NAME
|
|
": %s: link status up again after %d "
|
|
"ms for interface %s.\n",
|
|
bond->dev->name,
|
|
(bond->params.downdelay - slave->delay) * bond->params.miimon,
|
|
slave_dev->name);
|
|
}
|
|
break;
|
|
case BOND_LINK_DOWN: /* the link was down */
|
|
if (link_state != BMSR_LSTATUS) {
|
|
/* the link stays down, nothing more to do */
|
|
break;
|
|
} else { /* link going up */
|
|
slave->link = BOND_LINK_BACK;
|
|
slave->delay = bond->params.updelay;
|
|
|
|
if (bond->params.updelay) {
|
|
/* if updelay == 0, no need to
|
|
advertise about a 0 ms delay */
|
|
printk(KERN_INFO DRV_NAME
|
|
": %s: link status up for "
|
|
"interface %s, enabling it "
|
|
"in %d ms.\n",
|
|
bond->dev->name,
|
|
slave_dev->name,
|
|
bond->params.updelay * bond->params.miimon);
|
|
}
|
|
}
|
|
/* no break ! fall through the BOND_LINK_BACK state in
|
|
case there's something to do.
|
|
*/
|
|
case BOND_LINK_BACK: /* the link has just come back */
|
|
if (link_state != BMSR_LSTATUS) {
|
|
/* link down again */
|
|
slave->link = BOND_LINK_DOWN;
|
|
|
|
printk(KERN_INFO DRV_NAME
|
|
": %s: link status down again after %d "
|
|
"ms for interface %s.\n",
|
|
bond->dev->name,
|
|
(bond->params.updelay - slave->delay) * bond->params.miimon,
|
|
slave_dev->name);
|
|
} else {
|
|
/* link stays up */
|
|
if (slave->delay == 0) {
|
|
if (!have_locks)
|
|
return 1;
|
|
|
|
/* now the link has been up for long time enough */
|
|
slave->link = BOND_LINK_UP;
|
|
slave->jiffies = jiffies;
|
|
|
|
if (bond->params.mode == BOND_MODE_8023AD) {
|
|
/* prevent it from being the active one */
|
|
slave->state = BOND_STATE_BACKUP;
|
|
} else if (bond->params.mode != BOND_MODE_ACTIVEBACKUP) {
|
|
/* make it immediately active */
|
|
slave->state = BOND_STATE_ACTIVE;
|
|
} else if (slave != bond->primary_slave) {
|
|
/* prevent it from being the active one */
|
|
slave->state = BOND_STATE_BACKUP;
|
|
}
|
|
|
|
printk(KERN_INFO DRV_NAME
|
|
": %s: link status definitely "
|
|
"up for interface %s.\n",
|
|
bond->dev->name,
|
|
slave_dev->name);
|
|
|
|
/* notify ad that the link status has changed */
|
|
if (bond->params.mode == BOND_MODE_8023AD) {
|
|
bond_3ad_handle_link_change(slave, BOND_LINK_UP);
|
|
}
|
|
|
|
if ((bond->params.mode == BOND_MODE_TLB) ||
|
|
(bond->params.mode == BOND_MODE_ALB)) {
|
|
bond_alb_handle_link_change(bond, slave, BOND_LINK_UP);
|
|
}
|
|
|
|
if ((!oldcurrent) ||
|
|
(slave == bond->primary_slave)) {
|
|
do_failover = 1;
|
|
}
|
|
} else {
|
|
slave->delay--;
|
|
}
|
|
}
|
|
break;
|
|
default:
|
|
/* Should not happen */
|
|
printk(KERN_ERR DRV_NAME
|
|
": %s: Error: %s Illegal value (link=%d)\n",
|
|
bond->dev->name,
|
|
slave->dev->name,
|
|
slave->link);
|
|
goto out;
|
|
} /* end of switch (slave->link) */
|
|
|
|
bond_update_speed_duplex(slave);
|
|
|
|
if (bond->params.mode == BOND_MODE_8023AD) {
|
|
if (old_speed != slave->speed) {
|
|
bond_3ad_adapter_speed_changed(slave);
|
|
}
|
|
|
|
if (old_duplex != slave->duplex) {
|
|
bond_3ad_adapter_duplex_changed(slave);
|
|
}
|
|
}
|
|
|
|
} /* end of for */
|
|
|
|
if (do_failover) {
|
|
ASSERT_RTNL();
|
|
|
|
write_lock_bh(&bond->curr_slave_lock);
|
|
|
|
bond_select_active_slave(bond);
|
|
|
|
write_unlock_bh(&bond->curr_slave_lock);
|
|
|
|
} else
|
|
bond_set_carrier(bond);
|
|
|
|
out:
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* 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 another pass
|
|
* to implement whatever link state changes are indicated.
|
|
*/
|
|
void bond_mii_monitor(struct work_struct *work)
|
|
{
|
|
struct bonding *bond = container_of(work, struct bonding,
|
|
mii_work.work);
|
|
unsigned long delay;
|
|
|
|
read_lock(&bond->lock);
|
|
if (bond->kill_timers) {
|
|
read_unlock(&bond->lock);
|
|
return;
|
|
}
|
|
if (__bond_mii_monitor(bond, 0)) {
|
|
read_unlock(&bond->lock);
|
|
rtnl_lock();
|
|
read_lock(&bond->lock);
|
|
__bond_mii_monitor(bond, 1);
|
|
read_unlock(&bond->lock);
|
|
rtnl_unlock(); /* might sleep, hold no other locks */
|
|
read_lock(&bond->lock);
|
|
}
|
|
|
|
delay = ((bond->params.miimon * HZ) / 1000) ? : 1;
|
|
read_unlock(&bond->lock);
|
|
queue_delayed_work(bond->wq, &bond->mii_work, delay);
|
|
}
|
|
|
|
static __be32 bond_glean_dev_ip(struct net_device *dev)
|
|
{
|
|
struct in_device *idev;
|
|
struct in_ifaddr *ifa;
|
|
__be32 addr = 0;
|
|
|
|
if (!dev)
|
|
return 0;
|
|
|
|
rcu_read_lock();
|
|
idev = __in_dev_get_rcu(dev);
|
|
if (!idev)
|
|
goto out;
|
|
|
|
ifa = idev->ifa_list;
|
|
if (!ifa)
|
|
goto out;
|
|
|
|
addr = ifa->ifa_local;
|
|
out:
|
|
rcu_read_unlock();
|
|
return addr;
|
|
}
|
|
|
|
static int bond_has_ip(struct bonding *bond)
|
|
{
|
|
struct vlan_entry *vlan, *vlan_next;
|
|
|
|
if (bond->master_ip)
|
|
return 1;
|
|
|
|
if (list_empty(&bond->vlan_list))
|
|
return 0;
|
|
|
|
list_for_each_entry_safe(vlan, vlan_next, &bond->vlan_list,
|
|
vlan_list) {
|
|
if (vlan->vlan_ip)
|
|
return 1;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int bond_has_this_ip(struct bonding *bond, __be32 ip)
|
|
{
|
|
struct vlan_entry *vlan, *vlan_next;
|
|
|
|
if (ip == bond->master_ip)
|
|
return 1;
|
|
|
|
if (list_empty(&bond->vlan_list))
|
|
return 0;
|
|
|
|
list_for_each_entry_safe(vlan, vlan_next, &bond->vlan_list,
|
|
vlan_list) {
|
|
if (ip == vlan->vlan_ip)
|
|
return 1;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* 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, unsigned short vlan_id)
|
|
{
|
|
struct sk_buff *skb;
|
|
|
|
dprintk("arp %d on slave %s: dst %x src %x vid %d\n", arp_op,
|
|
slave_dev->name, dest_ip, src_ip, vlan_id);
|
|
|
|
skb = arp_create(arp_op, ETH_P_ARP, dest_ip, slave_dev, src_ip,
|
|
NULL, slave_dev->dev_addr, NULL);
|
|
|
|
if (!skb) {
|
|
printk(KERN_ERR DRV_NAME ": ARP packet allocation failed\n");
|
|
return;
|
|
}
|
|
if (vlan_id) {
|
|
skb = vlan_put_tag(skb, vlan_id);
|
|
if (!skb) {
|
|
printk(KERN_ERR DRV_NAME ": failed to insert VLAN tag\n");
|
|
return;
|
|
}
|
|
}
|
|
arp_xmit(skb);
|
|
}
|
|
|
|
|
|
static void bond_arp_send_all(struct bonding *bond, struct slave *slave)
|
|
{
|
|
int i, vlan_id, rv;
|
|
__be32 *targets = bond->params.arp_targets;
|
|
struct vlan_entry *vlan, *vlan_next;
|
|
struct net_device *vlan_dev;
|
|
struct flowi fl;
|
|
struct rtable *rt;
|
|
|
|
for (i = 0; (i < BOND_MAX_ARP_TARGETS); i++) {
|
|
if (!targets[i])
|
|
continue;
|
|
dprintk("basa: target %x\n", targets[i]);
|
|
if (list_empty(&bond->vlan_list)) {
|
|
dprintk("basa: empty vlan: arp_send\n");
|
|
bond_arp_send(slave->dev, ARPOP_REQUEST, targets[i],
|
|
bond->master_ip, 0);
|
|
continue;
|
|
}
|
|
|
|
/*
|
|
* If VLANs are configured, we do a route lookup to
|
|
* determine which VLAN interface would be used, so we
|
|
* can tag the ARP with the proper VLAN tag.
|
|
*/
|
|
memset(&fl, 0, sizeof(fl));
|
|
fl.fl4_dst = targets[i];
|
|
fl.fl4_tos = RTO_ONLINK;
|
|
|
|
rv = ip_route_output_key(&init_net, &rt, &fl);
|
|
if (rv) {
|
|
if (net_ratelimit()) {
|
|
printk(KERN_WARNING DRV_NAME
|
|
": %s: no route to arp_ip_target %u.%u.%u.%u\n",
|
|
bond->dev->name, NIPQUAD(fl.fl4_dst));
|
|
}
|
|
continue;
|
|
}
|
|
|
|
/*
|
|
* This target is not on a VLAN
|
|
*/
|
|
if (rt->u.dst.dev == bond->dev) {
|
|
ip_rt_put(rt);
|
|
dprintk("basa: rtdev == bond->dev: arp_send\n");
|
|
bond_arp_send(slave->dev, ARPOP_REQUEST, targets[i],
|
|
bond->master_ip, 0);
|
|
continue;
|
|
}
|
|
|
|
vlan_id = 0;
|
|
list_for_each_entry_safe(vlan, vlan_next, &bond->vlan_list,
|
|
vlan_list) {
|
|
vlan_dev = vlan_group_get_device(bond->vlgrp, vlan->vlan_id);
|
|
if (vlan_dev == rt->u.dst.dev) {
|
|
vlan_id = vlan->vlan_id;
|
|
dprintk("basa: vlan match on %s %d\n",
|
|
vlan_dev->name, vlan_id);
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (vlan_id) {
|
|
ip_rt_put(rt);
|
|
bond_arp_send(slave->dev, ARPOP_REQUEST, targets[i],
|
|
vlan->vlan_ip, vlan_id);
|
|
continue;
|
|
}
|
|
|
|
if (net_ratelimit()) {
|
|
printk(KERN_WARNING DRV_NAME
|
|
": %s: no path to arp_ip_target %u.%u.%u.%u via rt.dev %s\n",
|
|
bond->dev->name, NIPQUAD(fl.fl4_dst),
|
|
rt->u.dst.dev ? rt->u.dst.dev->name : "NULL");
|
|
}
|
|
ip_rt_put(rt);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Kick out a gratuitous ARP for an IP on the bonding master plus one
|
|
* for each VLAN above us.
|
|
*/
|
|
static void bond_send_gratuitous_arp(struct bonding *bond)
|
|
{
|
|
struct slave *slave = bond->curr_active_slave;
|
|
struct vlan_entry *vlan;
|
|
struct net_device *vlan_dev;
|
|
|
|
dprintk("bond_send_grat_arp: bond %s slave %s\n", bond->dev->name,
|
|
slave ? slave->dev->name : "NULL");
|
|
if (!slave)
|
|
return;
|
|
|
|
if (bond->master_ip) {
|
|
bond_arp_send(slave->dev, ARPOP_REPLY, bond->master_ip,
|
|
bond->master_ip, 0);
|
|
}
|
|
|
|
list_for_each_entry(vlan, &bond->vlan_list, vlan_list) {
|
|
vlan_dev = vlan_group_get_device(bond->vlgrp, vlan->vlan_id);
|
|
if (vlan->vlan_ip) {
|
|
bond_arp_send(slave->dev, ARPOP_REPLY, vlan->vlan_ip,
|
|
vlan->vlan_ip, vlan->vlan_id);
|
|
}
|
|
}
|
|
}
|
|
|
|
static void bond_validate_arp(struct bonding *bond, struct slave *slave, __be32 sip, __be32 tip)
|
|
{
|
|
int i;
|
|
__be32 *targets = bond->params.arp_targets;
|
|
|
|
targets = bond->params.arp_targets;
|
|
for (i = 0; (i < BOND_MAX_ARP_TARGETS) && targets[i]; i++) {
|
|
dprintk("bva: sip %u.%u.%u.%u tip %u.%u.%u.%u t[%d] "
|
|
"%u.%u.%u.%u bhti(tip) %d\n",
|
|
NIPQUAD(sip), NIPQUAD(tip), i, NIPQUAD(targets[i]),
|
|
bond_has_this_ip(bond, tip));
|
|
if (sip == targets[i]) {
|
|
if (bond_has_this_ip(bond, tip))
|
|
slave->last_arp_rx = jiffies;
|
|
return;
|
|
}
|
|
}
|
|
}
|
|
|
|
static int bond_arp_rcv(struct sk_buff *skb, struct net_device *dev, struct packet_type *pt, struct net_device *orig_dev)
|
|
{
|
|
struct arphdr *arp;
|
|
struct slave *slave;
|
|
struct bonding *bond;
|
|
unsigned char *arp_ptr;
|
|
__be32 sip, tip;
|
|
|
|
if (dev_net(dev) != &init_net)
|
|
goto out;
|
|
|
|
if (!(dev->priv_flags & IFF_BONDING) || !(dev->flags & IFF_MASTER))
|
|
goto out;
|
|
|
|
bond = dev->priv;
|
|
read_lock(&bond->lock);
|
|
|
|
dprintk("bond_arp_rcv: bond %s skb->dev %s orig_dev %s\n",
|
|
bond->dev->name, skb->dev ? skb->dev->name : "NULL",
|
|
orig_dev ? orig_dev->name : "NULL");
|
|
|
|
slave = bond_get_slave_by_dev(bond, orig_dev);
|
|
if (!slave || !slave_do_arp_validate(bond, slave))
|
|
goto out_unlock;
|
|
|
|
if (!pskb_may_pull(skb, arp_hdr_len(dev)))
|
|
goto out_unlock;
|
|
|
|
arp = arp_hdr(skb);
|
|
if (arp->ar_hln != 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 += dev->addr_len;
|
|
memcpy(&sip, arp_ptr, 4);
|
|
arp_ptr += 4 + dev->addr_len;
|
|
memcpy(&tip, arp_ptr, 4);
|
|
|
|
dprintk("bond_arp_rcv: %s %s/%d av %d sv %d sip %u.%u.%u.%u"
|
|
" tip %u.%u.%u.%u\n", bond->dev->name, slave->dev->name,
|
|
slave->state, bond->params.arp_validate,
|
|
slave_do_arp_validate(bond, slave), NIPQUAD(sip), NIPQUAD(tip));
|
|
|
|
/*
|
|
* Backup slaves won't see the ARP reply, but do come through
|
|
* here for each ARP probe (so we swap the sip/tip to validate
|
|
* the probe). In a "redundant switch, common router" type of
|
|
* configuration, the ARP probe will (hopefully) travel from
|
|
* the active, through one switch, the router, then the other
|
|
* switch before reaching the backup.
|
|
*/
|
|
if (slave->state == BOND_STATE_ACTIVE)
|
|
bond_validate_arp(bond, slave, sip, tip);
|
|
else
|
|
bond_validate_arp(bond, slave, tip, sip);
|
|
|
|
out_unlock:
|
|
read_unlock(&bond->lock);
|
|
out:
|
|
dev_kfree_skb(skb);
|
|
return NET_RX_SUCCESS;
|
|
}
|
|
|
|
/*
|
|
* 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.
|
|
*/
|
|
void bond_loadbalance_arp_mon(struct work_struct *work)
|
|
{
|
|
struct bonding *bond = container_of(work, struct bonding,
|
|
arp_work.work);
|
|
struct slave *slave, *oldcurrent;
|
|
int do_failover = 0;
|
|
int delta_in_ticks;
|
|
int i;
|
|
|
|
read_lock(&bond->lock);
|
|
|
|
delta_in_ticks = (bond->params.arp_interval * HZ) / 1000;
|
|
|
|
if (bond->kill_timers) {
|
|
goto out;
|
|
}
|
|
|
|
if (bond->slave_cnt == 0) {
|
|
goto re_arm;
|
|
}
|
|
|
|
read_lock(&bond->curr_slave_lock);
|
|
oldcurrent = bond->curr_active_slave;
|
|
read_unlock(&bond->curr_slave_lock);
|
|
|
|
/* 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->jiffies 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(bond, slave, i) {
|
|
if (slave->link != BOND_LINK_UP) {
|
|
if (time_before_eq(jiffies, slave->dev->trans_start + delta_in_ticks) &&
|
|
time_before_eq(jiffies, slave->dev->last_rx + delta_in_ticks)) {
|
|
|
|
slave->link = BOND_LINK_UP;
|
|
slave->state = BOND_STATE_ACTIVE;
|
|
|
|
/* 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) {
|
|
printk(KERN_INFO DRV_NAME
|
|
": %s: link status definitely "
|
|
"up for interface %s, ",
|
|
bond->dev->name,
|
|
slave->dev->name);
|
|
do_failover = 1;
|
|
} else {
|
|
printk(KERN_INFO DRV_NAME
|
|
": %s: interface %s is now up\n",
|
|
bond->dev->name,
|
|
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 (time_after_eq(jiffies, slave->dev->trans_start + 2*delta_in_ticks) ||
|
|
(time_after_eq(jiffies, slave->dev->last_rx + 2*delta_in_ticks) &&
|
|
bond_has_ip(bond))) {
|
|
|
|
slave->link = BOND_LINK_DOWN;
|
|
slave->state = BOND_STATE_BACKUP;
|
|
|
|
if (slave->link_failure_count < UINT_MAX) {
|
|
slave->link_failure_count++;
|
|
}
|
|
|
|
printk(KERN_INFO DRV_NAME
|
|
": %s: interface %s is now down.\n",
|
|
bond->dev->name,
|
|
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 (IS_UP(slave->dev)) {
|
|
bond_arp_send_all(bond, slave);
|
|
}
|
|
}
|
|
|
|
if (do_failover) {
|
|
write_lock_bh(&bond->curr_slave_lock);
|
|
|
|
bond_select_active_slave(bond);
|
|
|
|
write_unlock_bh(&bond->curr_slave_lock);
|
|
}
|
|
|
|
re_arm:
|
|
if (bond->params.arp_interval)
|
|
queue_delayed_work(bond->wq, &bond->arp_work, delta_in_ticks);
|
|
out:
|
|
read_unlock(&bond->lock);
|
|
}
|
|
|
|
/*
|
|
* When using arp monitoring in active-backup mode, this function is
|
|
* called to determine if any backup slaves have went down or a new
|
|
* current slave needs to be found.
|
|
* The backup slaves never generate traffic, they are considered up by merely
|
|
* receiving traffic. If the current slave goes down, each backup slave will
|
|
* be given the opportunity to tx/rx an arp before being taken down - this
|
|
* prevents all slaves from being taken down due to the current slave not
|
|
* sending any traffic for the backups to receive. The arps are not necessarily
|
|
* necessary, any tx and rx traffic will keep the current slave up. While any
|
|
* rx traffic will keep the backup slaves up, the current slave is responsible
|
|
* for generating traffic to keep them up regardless of any other traffic they
|
|
* may have received.
|
|
* see loadbalance_arp_monitor for arp monitoring in load balancing mode
|
|
*/
|
|
void bond_activebackup_arp_mon(struct work_struct *work)
|
|
{
|
|
struct bonding *bond = container_of(work, struct bonding,
|
|
arp_work.work);
|
|
struct slave *slave;
|
|
int delta_in_ticks;
|
|
int i;
|
|
|
|
read_lock(&bond->lock);
|
|
|
|
delta_in_ticks = (bond->params.arp_interval * HZ) / 1000;
|
|
|
|
if (bond->kill_timers) {
|
|
goto out;
|
|
}
|
|
|
|
if (bond->slave_cnt == 0) {
|
|
goto re_arm;
|
|
}
|
|
|
|
/* determine if any slave has come up or any backup slave has
|
|
* gone down
|
|
* TODO: what about up/down delay in arp mode? it wasn't here before
|
|
* so it can wait
|
|
*/
|
|
bond_for_each_slave(bond, slave, i) {
|
|
if (slave->link != BOND_LINK_UP) {
|
|
if (time_before_eq(jiffies,
|
|
slave_last_rx(bond, slave) + delta_in_ticks)) {
|
|
|
|
slave->link = BOND_LINK_UP;
|
|
|
|
write_lock_bh(&bond->curr_slave_lock);
|
|
|
|
if ((!bond->curr_active_slave) &&
|
|
time_before_eq(jiffies, slave->dev->trans_start + delta_in_ticks)) {
|
|
bond_change_active_slave(bond, slave);
|
|
bond->current_arp_slave = NULL;
|
|
} else if (bond->curr_active_slave != slave) {
|
|
/* this slave has just come up but we
|
|
* already have a current slave; this
|
|
* can also happen if bond_enslave adds
|
|
* a new slave that is up while we are
|
|
* searching for a new slave
|
|
*/
|
|
bond_set_slave_inactive_flags(slave);
|
|
bond->current_arp_slave = NULL;
|
|
}
|
|
|
|
bond_set_carrier(bond);
|
|
|
|
if (slave == bond->curr_active_slave) {
|
|
printk(KERN_INFO DRV_NAME
|
|
": %s: %s is up and now the "
|
|
"active interface\n",
|
|
bond->dev->name,
|
|
slave->dev->name);
|
|
netif_carrier_on(bond->dev);
|
|
} else {
|
|
printk(KERN_INFO DRV_NAME
|
|
": %s: backup interface %s is "
|
|
"now up\n",
|
|
bond->dev->name,
|
|
slave->dev->name);
|
|
}
|
|
|
|
write_unlock_bh(&bond->curr_slave_lock);
|
|
}
|
|
} else {
|
|
read_lock(&bond->curr_slave_lock);
|
|
|
|
if ((slave != bond->curr_active_slave) &&
|
|
(!bond->current_arp_slave) &&
|
|
(time_after_eq(jiffies, slave_last_rx(bond, slave) + 3*delta_in_ticks) &&
|
|
bond_has_ip(bond))) {
|
|
/* a backup slave has gone down; three times
|
|
* the delta allows the current slave to be
|
|
* taken out before the backup slave.
|
|
* 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
|
|
*/
|
|
|
|
read_unlock(&bond->curr_slave_lock);
|
|
|
|
slave->link = BOND_LINK_DOWN;
|
|
|
|
if (slave->link_failure_count < UINT_MAX) {
|
|
slave->link_failure_count++;
|
|
}
|
|
|
|
bond_set_slave_inactive_flags(slave);
|
|
|
|
printk(KERN_INFO DRV_NAME
|
|
": %s: backup interface %s is now down\n",
|
|
bond->dev->name,
|
|
slave->dev->name);
|
|
} else {
|
|
read_unlock(&bond->curr_slave_lock);
|
|
}
|
|
}
|
|
}
|
|
|
|
read_lock(&bond->curr_slave_lock);
|
|
slave = bond->curr_active_slave;
|
|
read_unlock(&bond->curr_slave_lock);
|
|
|
|
if (slave) {
|
|
/* if we have sent traffic in the past 2*arp_intervals but
|
|
* haven't xmit and rx traffic in that time interval, select
|
|
* a different slave. slave->jiffies is only updated when
|
|
* a slave first becomes the curr_active_slave - not necessarily
|
|
* after every arp; this ensures the slave has a full 2*delta
|
|
* before being taken out. if a primary is being used, check
|
|
* if it is up and needs to take over as the curr_active_slave
|
|
*/
|
|
if ((time_after_eq(jiffies, slave->dev->trans_start + 2*delta_in_ticks) ||
|
|
(time_after_eq(jiffies, slave_last_rx(bond, slave) + 2*delta_in_ticks) &&
|
|
bond_has_ip(bond))) &&
|
|
time_after_eq(jiffies, slave->jiffies + 2*delta_in_ticks)) {
|
|
|
|
slave->link = BOND_LINK_DOWN;
|
|
|
|
if (slave->link_failure_count < UINT_MAX) {
|
|
slave->link_failure_count++;
|
|
}
|
|
|
|
printk(KERN_INFO DRV_NAME
|
|
": %s: link status down for active interface "
|
|
"%s, disabling it\n",
|
|
bond->dev->name,
|
|
slave->dev->name);
|
|
|
|
write_lock_bh(&bond->curr_slave_lock);
|
|
|
|
bond_select_active_slave(bond);
|
|
slave = bond->curr_active_slave;
|
|
|
|
write_unlock_bh(&bond->curr_slave_lock);
|
|
|
|
bond->current_arp_slave = slave;
|
|
|
|
if (slave) {
|
|
slave->jiffies = jiffies;
|
|
}
|
|
} else if ((bond->primary_slave) &&
|
|
(bond->primary_slave != slave) &&
|
|
(bond->primary_slave->link == BOND_LINK_UP)) {
|
|
/* at this point, slave is the curr_active_slave */
|
|
printk(KERN_INFO DRV_NAME
|
|
": %s: changing from interface %s to primary "
|
|
"interface %s\n",
|
|
bond->dev->name,
|
|
slave->dev->name,
|
|
bond->primary_slave->dev->name);
|
|
|
|
/* primary is up so switch to it */
|
|
write_lock_bh(&bond->curr_slave_lock);
|
|
bond_change_active_slave(bond, bond->primary_slave);
|
|
write_unlock_bh(&bond->curr_slave_lock);
|
|
|
|
slave = bond->primary_slave;
|
|
slave->jiffies = jiffies;
|
|
} else {
|
|
bond->current_arp_slave = NULL;
|
|
}
|
|
|
|
/* the current slave must tx an arp to ensure backup slaves
|
|
* rx traffic
|
|
*/
|
|
if (slave && bond_has_ip(bond)) {
|
|
bond_arp_send_all(bond, slave);
|
|
}
|
|
}
|
|
|
|
/* 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 (!slave) {
|
|
if (!bond->current_arp_slave) {
|
|
bond->current_arp_slave = bond->first_slave;
|
|
}
|
|
|
|
if (bond->current_arp_slave) {
|
|
bond_set_slave_inactive_flags(bond->current_arp_slave);
|
|
|
|
/* search for next candidate */
|
|
bond_for_each_slave_from(bond, slave, i, bond->current_arp_slave->next) {
|
|
if (IS_UP(slave->dev)) {
|
|
slave->link = BOND_LINK_BACK;
|
|
bond_set_slave_active_flags(slave);
|
|
bond_arp_send_all(bond, slave);
|
|
slave->jiffies = jiffies;
|
|
bond->current_arp_slave = slave;
|
|
break;
|
|
}
|
|
|
|
/* 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 (slave->link == BOND_LINK_UP) {
|
|
slave->link = BOND_LINK_DOWN;
|
|
if (slave->link_failure_count < UINT_MAX) {
|
|
slave->link_failure_count++;
|
|
}
|
|
|
|
bond_set_slave_inactive_flags(slave);
|
|
|
|
printk(KERN_INFO DRV_NAME
|
|
": %s: backup interface %s is "
|
|
"now down.\n",
|
|
bond->dev->name,
|
|
slave->dev->name);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
re_arm:
|
|
if (bond->params.arp_interval) {
|
|
queue_delayed_work(bond->wq, &bond->arp_work, delta_in_ticks);
|
|
}
|
|
out:
|
|
read_unlock(&bond->lock);
|
|
}
|
|
|
|
/*------------------------------ proc/seq_file-------------------------------*/
|
|
|
|
#ifdef CONFIG_PROC_FS
|
|
|
|
static void *bond_info_seq_start(struct seq_file *seq, loff_t *pos)
|
|
{
|
|
struct bonding *bond = seq->private;
|
|
loff_t off = 0;
|
|
struct slave *slave;
|
|
int i;
|
|
|
|
/* make sure the bond won't be taken away */
|
|
read_lock(&dev_base_lock);
|
|
read_lock(&bond->lock);
|
|
|
|
if (*pos == 0) {
|
|
return SEQ_START_TOKEN;
|
|
}
|
|
|
|
bond_for_each_slave(bond, slave, i) {
|
|
if (++off == *pos) {
|
|
return slave;
|
|
}
|
|
}
|
|
|
|
return NULL;
|
|
}
|
|
|
|
static void *bond_info_seq_next(struct seq_file *seq, void *v, loff_t *pos)
|
|
{
|
|
struct bonding *bond = seq->private;
|
|
struct slave *slave = v;
|
|
|
|
++*pos;
|
|
if (v == SEQ_START_TOKEN) {
|
|
return bond->first_slave;
|
|
}
|
|
|
|
slave = slave->next;
|
|
|
|
return (slave == bond->first_slave) ? NULL : slave;
|
|
}
|
|
|
|
static void bond_info_seq_stop(struct seq_file *seq, void *v)
|
|
{
|
|
struct bonding *bond = seq->private;
|
|
|
|
read_unlock(&bond->lock);
|
|
read_unlock(&dev_base_lock);
|
|
}
|
|
|
|
static void bond_info_show_master(struct seq_file *seq)
|
|
{
|
|
struct bonding *bond = seq->private;
|
|
struct slave *curr;
|
|
int i;
|
|
u32 target;
|
|
|
|
read_lock(&bond->curr_slave_lock);
|
|
curr = bond->curr_active_slave;
|
|
read_unlock(&bond->curr_slave_lock);
|
|
|
|
seq_printf(seq, "Bonding Mode: %s",
|
|
bond_mode_name(bond->params.mode));
|
|
|
|
if (bond->params.mode == BOND_MODE_ACTIVEBACKUP &&
|
|
bond->params.fail_over_mac)
|
|
seq_printf(seq, " (fail_over_mac)");
|
|
|
|
seq_printf(seq, "\n");
|
|
|
|
if (bond->params.mode == BOND_MODE_XOR ||
|
|
bond->params.mode == BOND_MODE_8023AD) {
|
|
seq_printf(seq, "Transmit Hash Policy: %s (%d)\n",
|
|
xmit_hashtype_tbl[bond->params.xmit_policy].modename,
|
|
bond->params.xmit_policy);
|
|
}
|
|
|
|
if (USES_PRIMARY(bond->params.mode)) {
|
|
seq_printf(seq, "Primary Slave: %s\n",
|
|
(bond->primary_slave) ?
|
|
bond->primary_slave->dev->name : "None");
|
|
|
|
seq_printf(seq, "Currently Active Slave: %s\n",
|
|
(curr) ? curr->dev->name : "None");
|
|
}
|
|
|
|
seq_printf(seq, "MII Status: %s\n", netif_carrier_ok(bond->dev) ?
|
|
"up" : "down");
|
|
seq_printf(seq, "MII Polling Interval (ms): %d\n", bond->params.miimon);
|
|
seq_printf(seq, "Up Delay (ms): %d\n",
|
|
bond->params.updelay * bond->params.miimon);
|
|
seq_printf(seq, "Down Delay (ms): %d\n",
|
|
bond->params.downdelay * bond->params.miimon);
|
|
|
|
|
|
/* ARP information */
|
|
if(bond->params.arp_interval > 0) {
|
|
int printed=0;
|
|
seq_printf(seq, "ARP Polling Interval (ms): %d\n",
|
|
bond->params.arp_interval);
|
|
|
|
seq_printf(seq, "ARP IP target/s (n.n.n.n form):");
|
|
|
|
for(i = 0; (i < BOND_MAX_ARP_TARGETS) ;i++) {
|
|
if (!bond->params.arp_targets[i])
|
|
continue;
|
|
if (printed)
|
|
seq_printf(seq, ",");
|
|
target = ntohl(bond->params.arp_targets[i]);
|
|
seq_printf(seq, " %d.%d.%d.%d", HIPQUAD(target));
|
|
printed = 1;
|
|
}
|
|
seq_printf(seq, "\n");
|
|
}
|
|
|
|
if (bond->params.mode == BOND_MODE_8023AD) {
|
|
struct ad_info ad_info;
|
|
DECLARE_MAC_BUF(mac);
|
|
|
|
seq_puts(seq, "\n802.3ad info\n");
|
|
seq_printf(seq, "LACP rate: %s\n",
|
|
(bond->params.lacp_fast) ? "fast" : "slow");
|
|
|
|
if (bond_3ad_get_active_agg_info(bond, &ad_info)) {
|
|
seq_printf(seq, "bond %s has no active aggregator\n",
|
|
bond->dev->name);
|
|
} else {
|
|
seq_printf(seq, "Active Aggregator Info:\n");
|
|
|
|
seq_printf(seq, "\tAggregator ID: %d\n",
|
|
ad_info.aggregator_id);
|
|
seq_printf(seq, "\tNumber of ports: %d\n",
|
|
ad_info.ports);
|
|
seq_printf(seq, "\tActor Key: %d\n",
|
|
ad_info.actor_key);
|
|
seq_printf(seq, "\tPartner Key: %d\n",
|
|
ad_info.partner_key);
|
|
seq_printf(seq, "\tPartner Mac Address: %s\n",
|
|
print_mac(mac, ad_info.partner_system));
|
|
}
|
|
}
|
|
}
|
|
|
|
static void bond_info_show_slave(struct seq_file *seq, const struct slave *slave)
|
|
{
|
|
struct bonding *bond = seq->private;
|
|
DECLARE_MAC_BUF(mac);
|
|
|
|
seq_printf(seq, "\nSlave Interface: %s\n", slave->dev->name);
|
|
seq_printf(seq, "MII Status: %s\n",
|
|
(slave->link == BOND_LINK_UP) ? "up" : "down");
|
|
seq_printf(seq, "Link Failure Count: %u\n",
|
|
slave->link_failure_count);
|
|
|
|
seq_printf(seq,
|
|
"Permanent HW addr: %s\n",
|
|
print_mac(mac, slave->perm_hwaddr));
|
|
|
|
if (bond->params.mode == BOND_MODE_8023AD) {
|
|
const struct aggregator *agg
|
|
= SLAVE_AD_INFO(slave).port.aggregator;
|
|
|
|
if (agg) {
|
|
seq_printf(seq, "Aggregator ID: %d\n",
|
|
agg->aggregator_identifier);
|
|
} else {
|
|
seq_puts(seq, "Aggregator ID: N/A\n");
|
|
}
|
|
}
|
|
}
|
|
|
|
static int bond_info_seq_show(struct seq_file *seq, void *v)
|
|
{
|
|
if (v == SEQ_START_TOKEN) {
|
|
seq_printf(seq, "%s\n", version);
|
|
bond_info_show_master(seq);
|
|
} else {
|
|
bond_info_show_slave(seq, v);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static struct seq_operations bond_info_seq_ops = {
|
|
.start = bond_info_seq_start,
|
|
.next = bond_info_seq_next,
|
|
.stop = bond_info_seq_stop,
|
|
.show = bond_info_seq_show,
|
|
};
|
|
|
|
static int bond_info_open(struct inode *inode, struct file *file)
|
|
{
|
|
struct seq_file *seq;
|
|
struct proc_dir_entry *proc;
|
|
int res;
|
|
|
|
res = seq_open(file, &bond_info_seq_ops);
|
|
if (!res) {
|
|
/* recover the pointer buried in proc_dir_entry data */
|
|
seq = file->private_data;
|
|
proc = PDE(inode);
|
|
seq->private = proc->data;
|
|
}
|
|
|
|
return res;
|
|
}
|
|
|
|
static const struct file_operations bond_info_fops = {
|
|
.owner = THIS_MODULE,
|
|
.open = bond_info_open,
|
|
.read = seq_read,
|
|
.llseek = seq_lseek,
|
|
.release = seq_release,
|
|
};
|
|
|
|
static int bond_create_proc_entry(struct bonding *bond)
|
|
{
|
|
struct net_device *bond_dev = bond->dev;
|
|
|
|
if (bond_proc_dir) {
|
|
bond->proc_entry = proc_create_data(bond_dev->name,
|
|
S_IRUGO, bond_proc_dir,
|
|
&bond_info_fops, bond);
|
|
if (bond->proc_entry == NULL) {
|
|
printk(KERN_WARNING DRV_NAME
|
|
": Warning: Cannot create /proc/net/%s/%s\n",
|
|
DRV_NAME, bond_dev->name);
|
|
} else {
|
|
memcpy(bond->proc_file_name, bond_dev->name, IFNAMSIZ);
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void bond_remove_proc_entry(struct bonding *bond)
|
|
{
|
|
if (bond_proc_dir && bond->proc_entry) {
|
|
remove_proc_entry(bond->proc_file_name, bond_proc_dir);
|
|
memset(bond->proc_file_name, 0, IFNAMSIZ);
|
|
bond->proc_entry = NULL;
|
|
}
|
|
}
|
|
|
|
/* Create the bonding directory under /proc/net, if doesn't exist yet.
|
|
* Caller must hold rtnl_lock.
|
|
*/
|
|
static void bond_create_proc_dir(void)
|
|
{
|
|
int len = strlen(DRV_NAME);
|
|
|
|
for (bond_proc_dir = init_net.proc_net->subdir; bond_proc_dir;
|
|
bond_proc_dir = bond_proc_dir->next) {
|
|
if ((bond_proc_dir->namelen == len) &&
|
|
!memcmp(bond_proc_dir->name, DRV_NAME, len)) {
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (!bond_proc_dir) {
|
|
bond_proc_dir = proc_mkdir(DRV_NAME, init_net.proc_net);
|
|
if (bond_proc_dir) {
|
|
bond_proc_dir->owner = THIS_MODULE;
|
|
} else {
|
|
printk(KERN_WARNING DRV_NAME
|
|
": Warning: cannot create /proc/net/%s\n",
|
|
DRV_NAME);
|
|
}
|
|
}
|
|
}
|
|
|
|
/* Destroy the bonding directory under /proc/net, if empty.
|
|
* Caller must hold rtnl_lock.
|
|
*/
|
|
static void bond_destroy_proc_dir(void)
|
|
{
|
|
struct proc_dir_entry *de;
|
|
|
|
if (!bond_proc_dir) {
|
|
return;
|
|
}
|
|
|
|
/* verify that the /proc dir is empty */
|
|
for (de = bond_proc_dir->subdir; de; de = de->next) {
|
|
/* ignore . and .. */
|
|
if (*(de->name) != '.') {
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (de) {
|
|
if (bond_proc_dir->owner == THIS_MODULE) {
|
|
bond_proc_dir->owner = NULL;
|
|
}
|
|
} else {
|
|
remove_proc_entry(DRV_NAME, init_net.proc_net);
|
|
bond_proc_dir = NULL;
|
|
}
|
|
}
|
|
#endif /* CONFIG_PROC_FS */
|
|
|
|
/*-------------------------- netdev event handling --------------------------*/
|
|
|
|
/*
|
|
* Change device name
|
|
*/
|
|
static int bond_event_changename(struct bonding *bond)
|
|
{
|
|
#ifdef CONFIG_PROC_FS
|
|
bond_remove_proc_entry(bond);
|
|
bond_create_proc_entry(bond);
|
|
#endif
|
|
down_write(&(bonding_rwsem));
|
|
bond_destroy_sysfs_entry(bond);
|
|
bond_create_sysfs_entry(bond);
|
|
up_write(&(bonding_rwsem));
|
|
return NOTIFY_DONE;
|
|
}
|
|
|
|
static int bond_master_netdev_event(unsigned long event, struct net_device *bond_dev)
|
|
{
|
|
struct bonding *event_bond = bond_dev->priv;
|
|
|
|
switch (event) {
|
|
case NETDEV_CHANGENAME:
|
|
return bond_event_changename(event_bond);
|
|
case NETDEV_UNREGISTER:
|
|
bond_release_all(event_bond->dev);
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
|
|
return NOTIFY_DONE;
|
|
}
|
|
|
|
static int bond_slave_netdev_event(unsigned long event, struct net_device *slave_dev)
|
|
{
|
|
struct net_device *bond_dev = slave_dev->master;
|
|
struct bonding *bond = bond_dev->priv;
|
|
|
|
switch (event) {
|
|
case NETDEV_UNREGISTER:
|
|
if (bond_dev) {
|
|
if (bond->setup_by_slave)
|
|
bond_release_and_destroy(bond_dev, slave_dev);
|
|
else
|
|
bond_release(bond_dev, slave_dev);
|
|
}
|
|
break;
|
|
case NETDEV_CHANGE:
|
|
/*
|
|
* TODO: is this what we get if somebody
|
|
* sets up a hierarchical bond, then rmmod's
|
|
* one of the slave bonding devices?
|
|
*/
|
|
break;
|
|
case NETDEV_DOWN:
|
|
/*
|
|
* ... Or is it this?
|
|
*/
|
|
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:
|
|
/*
|
|
* TODO: handle changing the primary's name
|
|
*/
|
|
break;
|
|
case NETDEV_FEAT_CHANGE:
|
|
bond_compute_features(bond);
|
|
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 = (struct net_device *)ptr;
|
|
|
|
if (dev_net(event_dev) != &init_net)
|
|
return NOTIFY_DONE;
|
|
|
|
dprintk("event_dev: %s, event: %lx\n",
|
|
(event_dev ? event_dev->name : "None"),
|
|
event);
|
|
|
|
if (!(event_dev->priv_flags & IFF_BONDING))
|
|
return NOTIFY_DONE;
|
|
|
|
if (event_dev->flags & IFF_MASTER) {
|
|
dprintk("IFF_MASTER\n");
|
|
return bond_master_netdev_event(event, event_dev);
|
|
}
|
|
|
|
if (event_dev->flags & IFF_SLAVE) {
|
|
dprintk("IFF_SLAVE\n");
|
|
return bond_slave_netdev_event(event, event_dev);
|
|
}
|
|
|
|
return NOTIFY_DONE;
|
|
}
|
|
|
|
/*
|
|
* bond_inetaddr_event: handle inetaddr notifier chain events.
|
|
*
|
|
* We keep track of device IPs primarily to use as source addresses in
|
|
* ARP monitor probes (rather than spewing out broadcasts all the time).
|
|
*
|
|
* We track one IP for the main device (if it has one), plus one per VLAN.
|
|
*/
|
|
static int bond_inetaddr_event(struct notifier_block *this, unsigned long event, void *ptr)
|
|
{
|
|
struct in_ifaddr *ifa = ptr;
|
|
struct net_device *vlan_dev, *event_dev = ifa->ifa_dev->dev;
|
|
struct bonding *bond, *bond_next;
|
|
struct vlan_entry *vlan, *vlan_next;
|
|
|
|
if (dev_net(ifa->ifa_dev->dev) != &init_net)
|
|
return NOTIFY_DONE;
|
|
|
|
list_for_each_entry_safe(bond, bond_next, &bond_dev_list, bond_list) {
|
|
if (bond->dev == event_dev) {
|
|
switch (event) {
|
|
case NETDEV_UP:
|
|
bond->master_ip = ifa->ifa_local;
|
|
return NOTIFY_OK;
|
|
case NETDEV_DOWN:
|
|
bond->master_ip = bond_glean_dev_ip(bond->dev);
|
|
return NOTIFY_OK;
|
|
default:
|
|
return NOTIFY_DONE;
|
|
}
|
|
}
|
|
|
|
if (list_empty(&bond->vlan_list))
|
|
continue;
|
|
|
|
list_for_each_entry_safe(vlan, vlan_next, &bond->vlan_list,
|
|
vlan_list) {
|
|
vlan_dev = vlan_group_get_device(bond->vlgrp, vlan->vlan_id);
|
|
if (vlan_dev == event_dev) {
|
|
switch (event) {
|
|
case NETDEV_UP:
|
|
vlan->vlan_ip = ifa->ifa_local;
|
|
return NOTIFY_OK;
|
|
case NETDEV_DOWN:
|
|
vlan->vlan_ip =
|
|
bond_glean_dev_ip(vlan_dev);
|
|
return NOTIFY_OK;
|
|
default:
|
|
return NOTIFY_DONE;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
return NOTIFY_DONE;
|
|
}
|
|
|
|
static struct notifier_block bond_netdev_notifier = {
|
|
.notifier_call = bond_netdev_event,
|
|
};
|
|
|
|
static struct notifier_block bond_inetaddr_notifier = {
|
|
.notifier_call = bond_inetaddr_event,
|
|
};
|
|
|
|
/*-------------------------- Packet type handling ---------------------------*/
|
|
|
|
/* register to receive lacpdus on a bond */
|
|
static void bond_register_lacpdu(struct bonding *bond)
|
|
{
|
|
struct packet_type *pk_type = &(BOND_AD_INFO(bond).ad_pkt_type);
|
|
|
|
/* initialize packet type */
|
|
pk_type->type = PKT_TYPE_LACPDU;
|
|
pk_type->dev = bond->dev;
|
|
pk_type->func = bond_3ad_lacpdu_recv;
|
|
|
|
dev_add_pack(pk_type);
|
|
}
|
|
|
|
/* unregister to receive lacpdus on a bond */
|
|
static void bond_unregister_lacpdu(struct bonding *bond)
|
|
{
|
|
dev_remove_pack(&(BOND_AD_INFO(bond).ad_pkt_type));
|
|
}
|
|
|
|
void bond_register_arp(struct bonding *bond)
|
|
{
|
|
struct packet_type *pt = &bond->arp_mon_pt;
|
|
|
|
if (pt->type)
|
|
return;
|
|
|
|
pt->type = htons(ETH_P_ARP);
|
|
pt->dev = bond->dev;
|
|
pt->func = bond_arp_rcv;
|
|
dev_add_pack(pt);
|
|
}
|
|
|
|
void bond_unregister_arp(struct bonding *bond)
|
|
{
|
|
struct packet_type *pt = &bond->arp_mon_pt;
|
|
|
|
dev_remove_pack(pt);
|
|
pt->type = 0;
|
|
}
|
|
|
|
/*---------------------------- Hashing Policies -----------------------------*/
|
|
|
|
/*
|
|
* Hash for the output device based upon layer 2 and layer 3 data. If
|
|
* the packet is not IP mimic bond_xmit_hash_policy_l2()
|
|
*/
|
|
static int bond_xmit_hash_policy_l23(struct sk_buff *skb,
|
|
struct net_device *bond_dev, int count)
|
|
{
|
|
struct ethhdr *data = (struct ethhdr *)skb->data;
|
|
struct iphdr *iph = ip_hdr(skb);
|
|
|
|
if (skb->protocol == __constant_htons(ETH_P_IP)) {
|
|
return ((ntohl(iph->saddr ^ iph->daddr) & 0xffff) ^
|
|
(data->h_dest[5] ^ bond_dev->dev_addr[5])) % count;
|
|
}
|
|
|
|
return (data->h_dest[5] ^ bond_dev->dev_addr[5]) % count;
|
|
}
|
|
|
|
/*
|
|
* Hash for the output device based upon layer 3 and layer 4 data. If
|
|
* the packet is a frag or not TCP or UDP, just use layer 3 data. If it is
|
|
* altogether not IP, mimic bond_xmit_hash_policy_l2()
|
|
*/
|
|
static int bond_xmit_hash_policy_l34(struct sk_buff *skb,
|
|
struct net_device *bond_dev, int count)
|
|
{
|
|
struct ethhdr *data = (struct ethhdr *)skb->data;
|
|
struct iphdr *iph = ip_hdr(skb);
|
|
__be16 *layer4hdr = (__be16 *)((u32 *)iph + iph->ihl);
|
|
int layer4_xor = 0;
|
|
|
|
if (skb->protocol == __constant_htons(ETH_P_IP)) {
|
|
if (!(iph->frag_off & __constant_htons(IP_MF|IP_OFFSET)) &&
|
|
(iph->protocol == IPPROTO_TCP ||
|
|
iph->protocol == IPPROTO_UDP)) {
|
|
layer4_xor = ntohs((*layer4hdr ^ *(layer4hdr + 1)));
|
|
}
|
|
return (layer4_xor ^
|
|
((ntohl(iph->saddr ^ iph->daddr)) & 0xffff)) % count;
|
|
|
|
}
|
|
|
|
return (data->h_dest[5] ^ bond_dev->dev_addr[5]) % count;
|
|
}
|
|
|
|
/*
|
|
* Hash for the output device based upon layer 2 data
|
|
*/
|
|
static int bond_xmit_hash_policy_l2(struct sk_buff *skb,
|
|
struct net_device *bond_dev, int count)
|
|
{
|
|
struct ethhdr *data = (struct ethhdr *)skb->data;
|
|
|
|
return (data->h_dest[5] ^ bond_dev->dev_addr[5]) % count;
|
|
}
|
|
|
|
/*-------------------------- Device entry points ----------------------------*/
|
|
|
|
static int bond_open(struct net_device *bond_dev)
|
|
{
|
|
struct bonding *bond = bond_dev->priv;
|
|
|
|
bond->kill_timers = 0;
|
|
|
|
if ((bond->params.mode == BOND_MODE_TLB) ||
|
|
(bond->params.mode == BOND_MODE_ALB)) {
|
|
/* bond_alb_initialize must be called before the timer
|
|
* is started.
|
|
*/
|
|
if (bond_alb_initialize(bond, (bond->params.mode == BOND_MODE_ALB))) {
|
|
/* something went wrong - fail the open operation */
|
|
return -1;
|
|
}
|
|
|
|
INIT_DELAYED_WORK(&bond->alb_work, bond_alb_monitor);
|
|
queue_delayed_work(bond->wq, &bond->alb_work, 0);
|
|
}
|
|
|
|
if (bond->params.miimon) { /* link check interval, in milliseconds. */
|
|
INIT_DELAYED_WORK(&bond->mii_work, bond_mii_monitor);
|
|
queue_delayed_work(bond->wq, &bond->mii_work, 0);
|
|
}
|
|
|
|
if (bond->params.arp_interval) { /* arp interval, in milliseconds. */
|
|
if (bond->params.mode == BOND_MODE_ACTIVEBACKUP)
|
|
INIT_DELAYED_WORK(&bond->arp_work,
|
|
bond_activebackup_arp_mon);
|
|
else
|
|
INIT_DELAYED_WORK(&bond->arp_work,
|
|
bond_loadbalance_arp_mon);
|
|
|
|
queue_delayed_work(bond->wq, &bond->arp_work, 0);
|
|
if (bond->params.arp_validate)
|
|
bond_register_arp(bond);
|
|
}
|
|
|
|
if (bond->params.mode == BOND_MODE_8023AD) {
|
|
INIT_DELAYED_WORK(&bond->ad_work, bond_3ad_state_machine_handler);
|
|
queue_delayed_work(bond->wq, &bond->ad_work, 0);
|
|
/* register to receive LACPDUs */
|
|
bond_register_lacpdu(bond);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int bond_close(struct net_device *bond_dev)
|
|
{
|
|
struct bonding *bond = bond_dev->priv;
|
|
|
|
if (bond->params.mode == BOND_MODE_8023AD) {
|
|
/* Unregister the receive of LACPDUs */
|
|
bond_unregister_lacpdu(bond);
|
|
}
|
|
|
|
if (bond->params.arp_validate)
|
|
bond_unregister_arp(bond);
|
|
|
|
write_lock_bh(&bond->lock);
|
|
|
|
|
|
/* signal timers not to re-arm */
|
|
bond->kill_timers = 1;
|
|
|
|
write_unlock_bh(&bond->lock);
|
|
|
|
if (bond->params.miimon) { /* link check interval, in milliseconds. */
|
|
cancel_delayed_work(&bond->mii_work);
|
|
}
|
|
|
|
if (bond->params.arp_interval) { /* arp interval, in milliseconds. */
|
|
cancel_delayed_work(&bond->arp_work);
|
|
}
|
|
|
|
switch (bond->params.mode) {
|
|
case BOND_MODE_8023AD:
|
|
cancel_delayed_work(&bond->ad_work);
|
|
break;
|
|
case BOND_MODE_TLB:
|
|
case BOND_MODE_ALB:
|
|
cancel_delayed_work(&bond->alb_work);
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
|
|
|
|
if ((bond->params.mode == BOND_MODE_TLB) ||
|
|
(bond->params.mode == BOND_MODE_ALB)) {
|
|
/* Must be called only after all
|
|
* slaves have been released
|
|
*/
|
|
bond_alb_deinitialize(bond);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static struct net_device_stats *bond_get_stats(struct net_device *bond_dev)
|
|
{
|
|
struct bonding *bond = bond_dev->priv;
|
|
struct net_device_stats *stats = &(bond->stats), *sstats;
|
|
struct net_device_stats local_stats;
|
|
struct slave *slave;
|
|
int i;
|
|
|
|
memset(&local_stats, 0, sizeof(struct net_device_stats));
|
|
|
|
read_lock_bh(&bond->lock);
|
|
|
|
bond_for_each_slave(bond, slave, i) {
|
|
sstats = slave->dev->get_stats(slave->dev);
|
|
local_stats.rx_packets += sstats->rx_packets;
|
|
local_stats.rx_bytes += sstats->rx_bytes;
|
|
local_stats.rx_errors += sstats->rx_errors;
|
|
local_stats.rx_dropped += sstats->rx_dropped;
|
|
|
|
local_stats.tx_packets += sstats->tx_packets;
|
|
local_stats.tx_bytes += sstats->tx_bytes;
|
|
local_stats.tx_errors += sstats->tx_errors;
|
|
local_stats.tx_dropped += sstats->tx_dropped;
|
|
|
|
local_stats.multicast += sstats->multicast;
|
|
local_stats.collisions += sstats->collisions;
|
|
|
|
local_stats.rx_length_errors += sstats->rx_length_errors;
|
|
local_stats.rx_over_errors += sstats->rx_over_errors;
|
|
local_stats.rx_crc_errors += sstats->rx_crc_errors;
|
|
local_stats.rx_frame_errors += sstats->rx_frame_errors;
|
|
local_stats.rx_fifo_errors += sstats->rx_fifo_errors;
|
|
local_stats.rx_missed_errors += sstats->rx_missed_errors;
|
|
|
|
local_stats.tx_aborted_errors += sstats->tx_aborted_errors;
|
|
local_stats.tx_carrier_errors += sstats->tx_carrier_errors;
|
|
local_stats.tx_fifo_errors += sstats->tx_fifo_errors;
|
|
local_stats.tx_heartbeat_errors += sstats->tx_heartbeat_errors;
|
|
local_stats.tx_window_errors += sstats->tx_window_errors;
|
|
}
|
|
|
|
memcpy(stats, &local_stats, sizeof(struct net_device_stats));
|
|
|
|
read_unlock_bh(&bond->lock);
|
|
|
|
return stats;
|
|
}
|
|
|
|
static int bond_do_ioctl(struct net_device *bond_dev, struct ifreq *ifr, int cmd)
|
|
{
|
|
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;
|
|
int res = 0;
|
|
|
|
dprintk("bond_ioctl: master=%s, cmd=%d\n",
|
|
bond_dev->name, 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) {
|
|
struct bonding *bond = bond_dev->priv;
|
|
mii->val_out = 0;
|
|
read_lock(&bond->lock);
|
|
read_lock(&bond->curr_slave_lock);
|
|
if (netif_carrier_ok(bond->dev)) {
|
|
mii->val_out = BMSR_LSTATUS;
|
|
}
|
|
read_unlock(&bond->curr_slave_lock);
|
|
read_unlock(&bond->lock);
|
|
}
|
|
|
|
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;
|
|
}
|
|
|
|
res = bond_info_query(bond_dev, &k_binfo);
|
|
if (res == 0) {
|
|
if (copy_to_user(u_binfo, &k_binfo, sizeof(ifbond))) {
|
|
return -EFAULT;
|
|
}
|
|
}
|
|
|
|
return res;
|
|
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) {
|
|
if (copy_to_user(u_sinfo, &k_sinfo, sizeof(ifslave))) {
|
|
return -EFAULT;
|
|
}
|
|
}
|
|
|
|
return res;
|
|
default:
|
|
/* Go on */
|
|
break;
|
|
}
|
|
|
|
if (!capable(CAP_NET_ADMIN)) {
|
|
return -EPERM;
|
|
}
|
|
|
|
down_write(&(bonding_rwsem));
|
|
slave_dev = dev_get_by_name(&init_net, ifr->ifr_slave);
|
|
|
|
dprintk("slave_dev=%p: \n", slave_dev);
|
|
|
|
if (!slave_dev) {
|
|
res = -ENODEV;
|
|
} else {
|
|
dprintk("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:
|
|
res = bond_sethwaddr(bond_dev, slave_dev);
|
|
break;
|
|
case BOND_CHANGE_ACTIVE_OLD:
|
|
case SIOCBONDCHANGEACTIVE:
|
|
res = bond_ioctl_change_active(bond_dev, slave_dev);
|
|
break;
|
|
default:
|
|
res = -EOPNOTSUPP;
|
|
}
|
|
|
|
dev_put(slave_dev);
|
|
}
|
|
|
|
up_write(&(bonding_rwsem));
|
|
return res;
|
|
}
|
|
|
|
static void bond_set_multicast_list(struct net_device *bond_dev)
|
|
{
|
|
struct bonding *bond = bond_dev->priv;
|
|
struct dev_mc_list *dmi;
|
|
|
|
/*
|
|
* Do promisc before checking multicast_mode
|
|
*/
|
|
if ((bond_dev->flags & IFF_PROMISC) && !(bond->flags & IFF_PROMISC)) {
|
|
bond_set_promiscuity(bond, 1);
|
|
}
|
|
|
|
if (!(bond_dev->flags & IFF_PROMISC) && (bond->flags & IFF_PROMISC)) {
|
|
bond_set_promiscuity(bond, -1);
|
|
}
|
|
|
|
/* set allmulti flag to slaves */
|
|
if ((bond_dev->flags & IFF_ALLMULTI) && !(bond->flags & IFF_ALLMULTI)) {
|
|
bond_set_allmulti(bond, 1);
|
|
}
|
|
|
|
if (!(bond_dev->flags & IFF_ALLMULTI) && (bond->flags & IFF_ALLMULTI)) {
|
|
bond_set_allmulti(bond, -1);
|
|
}
|
|
|
|
read_lock(&bond->lock);
|
|
|
|
bond->flags = bond_dev->flags;
|
|
|
|
/* looking for addresses to add to slaves' mc list */
|
|
for (dmi = bond_dev->mc_list; dmi; dmi = dmi->next) {
|
|
if (!bond_mc_list_find_dmi(dmi, bond->mc_list)) {
|
|
bond_mc_add(bond, dmi->dmi_addr, dmi->dmi_addrlen);
|
|
}
|
|
}
|
|
|
|
/* looking for addresses to delete from slaves' list */
|
|
for (dmi = bond->mc_list; dmi; dmi = dmi->next) {
|
|
if (!bond_mc_list_find_dmi(dmi, bond_dev->mc_list)) {
|
|
bond_mc_delete(bond, dmi->dmi_addr, dmi->dmi_addrlen);
|
|
}
|
|
}
|
|
|
|
/* save master's multicast list */
|
|
bond_mc_list_destroy(bond);
|
|
bond_mc_list_copy(bond_dev->mc_list, bond, GFP_ATOMIC);
|
|
|
|
read_unlock(&bond->lock);
|
|
}
|
|
|
|
/*
|
|
* 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 = bond_dev->priv;
|
|
struct slave *slave, *stop_at;
|
|
int res = 0;
|
|
int i;
|
|
|
|
dprintk("bond=%p, name=%s, new_mtu=%d\n", bond,
|
|
(bond_dev ? bond_dev->name : "None"), new_mtu);
|
|
|
|
/* Can't hold bond->lock with bh disabled here since
|
|
* some base drivers panic. On the other hand we can't
|
|
* hold bond->lock without bh disabled because we'll
|
|
* deadlock. The only solution is to rely on the fact
|
|
* that we're under rtnl_lock here, and the slaves
|
|
* list won't change. This doesn't solve the problem
|
|
* of setting the slave's MTU while it is
|
|
* transmitting, but the assumption is that the base
|
|
* driver can handle that.
|
|
*
|
|
* TODO: figure out a way to safely iterate the slaves
|
|
* list, but without holding a lock around the actual
|
|
* call to the base driver.
|
|
*/
|
|
|
|
bond_for_each_slave(bond, slave, i) {
|
|
dprintk("s %p s->p %p c_m %p\n", slave,
|
|
slave->prev, slave->dev->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.
|
|
*/
|
|
dprintk("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 */
|
|
stop_at = slave;
|
|
bond_for_each_slave_from_to(bond, slave, i, bond->first_slave, stop_at) {
|
|
int tmp_res;
|
|
|
|
tmp_res = dev_set_mtu(slave->dev, bond_dev->mtu);
|
|
if (tmp_res) {
|
|
dprintk("unwind err %d dev %s\n", tmp_res,
|
|
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 = bond_dev->priv;
|
|
struct sockaddr *sa = addr, tmp_sa;
|
|
struct slave *slave, *stop_at;
|
|
int res = 0;
|
|
int i;
|
|
|
|
dprintk("bond=%p, name=%s\n", bond, (bond_dev ? bond_dev->name : "None"));
|
|
|
|
/*
|
|
* If fail_over_mac is enabled, do nothing and return success.
|
|
* Returning an error causes ifenslave to fail.
|
|
*/
|
|
if (bond->params.fail_over_mac)
|
|
return 0;
|
|
|
|
if (!is_valid_ether_addr(sa->sa_data)) {
|
|
return -EADDRNOTAVAIL;
|
|
}
|
|
|
|
/* Can't hold bond->lock with bh disabled here since
|
|
* some base drivers panic. On the other hand we can't
|
|
* hold bond->lock without bh disabled because we'll
|
|
* deadlock. The only solution is to rely on the fact
|
|
* that we're under rtnl_lock here, and the slaves
|
|
* list won't change. This doesn't solve the problem
|
|
* of setting the slave's hw address while it is
|
|
* transmitting, but the assumption is that the base
|
|
* driver can handle that.
|
|
*
|
|
* TODO: figure out a way to safely iterate the slaves
|
|
* list, but without holding a lock around the actual
|
|
* call to the base driver.
|
|
*/
|
|
|
|
bond_for_each_slave(bond, slave, i) {
|
|
dprintk("slave %p %s\n", slave, slave->dev->name);
|
|
|
|
if (slave->dev->set_mac_address == NULL) {
|
|
res = -EOPNOTSUPP;
|
|
dprintk("EOPNOTSUPP %s\n", slave->dev->name);
|
|
goto unwind;
|
|
}
|
|
|
|
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...
|
|
*/
|
|
dprintk("err %d %s\n", res, slave->dev->name);
|
|
goto unwind;
|
|
}
|
|
}
|
|
|
|
/* success */
|
|
memcpy(bond_dev->dev_addr, sa->sa_data, bond_dev->addr_len);
|
|
return 0;
|
|
|
|
unwind:
|
|
memcpy(tmp_sa.sa_data, bond_dev->dev_addr, bond_dev->addr_len);
|
|
tmp_sa.sa_family = bond_dev->type;
|
|
|
|
/* unwind from head to the slave that failed */
|
|
stop_at = slave;
|
|
bond_for_each_slave_from_to(bond, slave, i, bond->first_slave, stop_at) {
|
|
int tmp_res;
|
|
|
|
tmp_res = dev_set_mac_address(slave->dev, &tmp_sa);
|
|
if (tmp_res) {
|
|
dprintk("unwind err %d dev %s\n", tmp_res,
|
|
slave->dev->name);
|
|
}
|
|
}
|
|
|
|
return res;
|
|
}
|
|
|
|
static int bond_xmit_roundrobin(struct sk_buff *skb, struct net_device *bond_dev)
|
|
{
|
|
struct bonding *bond = bond_dev->priv;
|
|
struct slave *slave, *start_at;
|
|
int i, slave_no, res = 1;
|
|
|
|
read_lock(&bond->lock);
|
|
|
|
if (!BOND_IS_OK(bond)) {
|
|
goto out;
|
|
}
|
|
|
|
/*
|
|
* Concurrent TX may collide on rr_tx_counter; we accept that
|
|
* as being rare enough not to justify using an atomic op here
|
|
*/
|
|
slave_no = bond->rr_tx_counter++ % bond->slave_cnt;
|
|
|
|
bond_for_each_slave(bond, slave, i) {
|
|
slave_no--;
|
|
if (slave_no < 0) {
|
|
break;
|
|
}
|
|
}
|
|
|
|
start_at = slave;
|
|
bond_for_each_slave_from(bond, slave, i, start_at) {
|
|
if (IS_UP(slave->dev) &&
|
|
(slave->link == BOND_LINK_UP) &&
|
|
(slave->state == BOND_STATE_ACTIVE)) {
|
|
res = bond_dev_queue_xmit(bond, skb, slave->dev);
|
|
break;
|
|
}
|
|
}
|
|
|
|
out:
|
|
if (res) {
|
|
/* no suitable interface, frame not sent */
|
|
dev_kfree_skb(skb);
|
|
}
|
|
read_unlock(&bond->lock);
|
|
return 0;
|
|
}
|
|
|
|
|
|
/*
|
|
* 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 = bond_dev->priv;
|
|
int res = 1;
|
|
|
|
read_lock(&bond->lock);
|
|
read_lock(&bond->curr_slave_lock);
|
|
|
|
if (!BOND_IS_OK(bond)) {
|
|
goto out;
|
|
}
|
|
|
|
if (!bond->curr_active_slave)
|
|
goto out;
|
|
|
|
res = bond_dev_queue_xmit(bond, skb, bond->curr_active_slave->dev);
|
|
|
|
out:
|
|
if (res) {
|
|
/* no suitable interface, frame not sent */
|
|
dev_kfree_skb(skb);
|
|
}
|
|
read_unlock(&bond->curr_slave_lock);
|
|
read_unlock(&bond->lock);
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* In bond_xmit_xor() , we determine the output device by using a pre-
|
|
* determined xmit_hash_policy(), If the selected device is not enabled,
|
|
* find the next active slave.
|
|
*/
|
|
static int bond_xmit_xor(struct sk_buff *skb, struct net_device *bond_dev)
|
|
{
|
|
struct bonding *bond = bond_dev->priv;
|
|
struct slave *slave, *start_at;
|
|
int slave_no;
|
|
int i;
|
|
int res = 1;
|
|
|
|
read_lock(&bond->lock);
|
|
|
|
if (!BOND_IS_OK(bond)) {
|
|
goto out;
|
|
}
|
|
|
|
slave_no = bond->xmit_hash_policy(skb, bond_dev, bond->slave_cnt);
|
|
|
|
bond_for_each_slave(bond, slave, i) {
|
|
slave_no--;
|
|
if (slave_no < 0) {
|
|
break;
|
|
}
|
|
}
|
|
|
|
start_at = slave;
|
|
|
|
bond_for_each_slave_from(bond, slave, i, start_at) {
|
|
if (IS_UP(slave->dev) &&
|
|
(slave->link == BOND_LINK_UP) &&
|
|
(slave->state == BOND_STATE_ACTIVE)) {
|
|
res = bond_dev_queue_xmit(bond, skb, slave->dev);
|
|
break;
|
|
}
|
|
}
|
|
|
|
out:
|
|
if (res) {
|
|
/* no suitable interface, frame not sent */
|
|
dev_kfree_skb(skb);
|
|
}
|
|
read_unlock(&bond->lock);
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* 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 = bond_dev->priv;
|
|
struct slave *slave, *start_at;
|
|
struct net_device *tx_dev = NULL;
|
|
int i;
|
|
int res = 1;
|
|
|
|
read_lock(&bond->lock);
|
|
|
|
if (!BOND_IS_OK(bond)) {
|
|
goto out;
|
|
}
|
|
|
|
read_lock(&bond->curr_slave_lock);
|
|
start_at = bond->curr_active_slave;
|
|
read_unlock(&bond->curr_slave_lock);
|
|
|
|
if (!start_at) {
|
|
goto out;
|
|
}
|
|
|
|
bond_for_each_slave_from(bond, slave, i, start_at) {
|
|
if (IS_UP(slave->dev) &&
|
|
(slave->link == BOND_LINK_UP) &&
|
|
(slave->state == BOND_STATE_ACTIVE)) {
|
|
if (tx_dev) {
|
|
struct sk_buff *skb2 = skb_clone(skb, GFP_ATOMIC);
|
|
if (!skb2) {
|
|
printk(KERN_ERR DRV_NAME
|
|
": %s: Error: bond_xmit_broadcast(): "
|
|
"skb_clone() failed\n",
|
|
bond_dev->name);
|
|
continue;
|
|
}
|
|
|
|
res = bond_dev_queue_xmit(bond, skb2, tx_dev);
|
|
if (res) {
|
|
dev_kfree_skb(skb2);
|
|
continue;
|
|
}
|
|
}
|
|
tx_dev = slave->dev;
|
|
}
|
|
}
|
|
|
|
if (tx_dev) {
|
|
res = bond_dev_queue_xmit(bond, skb, tx_dev);
|
|
}
|
|
|
|
out:
|
|
if (res) {
|
|
/* no suitable interface, frame not sent */
|
|
dev_kfree_skb(skb);
|
|
}
|
|
/* frame sent to all suitable interfaces */
|
|
read_unlock(&bond->lock);
|
|
return 0;
|
|
}
|
|
|
|
/*------------------------- Device initialization ---------------------------*/
|
|
|
|
static void bond_set_xmit_hash_policy(struct bonding *bond)
|
|
{
|
|
switch (bond->params.xmit_policy) {
|
|
case BOND_XMIT_POLICY_LAYER23:
|
|
bond->xmit_hash_policy = bond_xmit_hash_policy_l23;
|
|
break;
|
|
case BOND_XMIT_POLICY_LAYER34:
|
|
bond->xmit_hash_policy = bond_xmit_hash_policy_l34;
|
|
break;
|
|
case BOND_XMIT_POLICY_LAYER2:
|
|
default:
|
|
bond->xmit_hash_policy = bond_xmit_hash_policy_l2;
|
|
break;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* set bond mode specific net device operations
|
|
*/
|
|
void bond_set_mode_ops(struct bonding *bond, int mode)
|
|
{
|
|
struct net_device *bond_dev = bond->dev;
|
|
|
|
switch (mode) {
|
|
case BOND_MODE_ROUNDROBIN:
|
|
bond_dev->hard_start_xmit = bond_xmit_roundrobin;
|
|
break;
|
|
case BOND_MODE_ACTIVEBACKUP:
|
|
bond_dev->hard_start_xmit = bond_xmit_activebackup;
|
|
break;
|
|
case BOND_MODE_XOR:
|
|
bond_dev->hard_start_xmit = bond_xmit_xor;
|
|
bond_set_xmit_hash_policy(bond);
|
|
break;
|
|
case BOND_MODE_BROADCAST:
|
|
bond_dev->hard_start_xmit = bond_xmit_broadcast;
|
|
break;
|
|
case BOND_MODE_8023AD:
|
|
bond_set_master_3ad_flags(bond);
|
|
bond_dev->hard_start_xmit = bond_3ad_xmit_xor;
|
|
bond_set_xmit_hash_policy(bond);
|
|
break;
|
|
case BOND_MODE_ALB:
|
|
bond_set_master_alb_flags(bond);
|
|
/* FALLTHRU */
|
|
case BOND_MODE_TLB:
|
|
bond_dev->hard_start_xmit = bond_alb_xmit;
|
|
bond_dev->set_mac_address = bond_alb_set_mac_address;
|
|
break;
|
|
default:
|
|
/* Should never happen, mode already checked */
|
|
printk(KERN_ERR DRV_NAME
|
|
": %s: Error: Unknown bonding mode %d\n",
|
|
bond_dev->name,
|
|
mode);
|
|
break;
|
|
}
|
|
}
|
|
|
|
static void bond_ethtool_get_drvinfo(struct net_device *bond_dev,
|
|
struct ethtool_drvinfo *drvinfo)
|
|
{
|
|
strncpy(drvinfo->driver, DRV_NAME, 32);
|
|
strncpy(drvinfo->version, DRV_VERSION, 32);
|
|
snprintf(drvinfo->fw_version, 32, "%d", BOND_ABI_VERSION);
|
|
}
|
|
|
|
static const struct ethtool_ops bond_ethtool_ops = {
|
|
.get_drvinfo = bond_ethtool_get_drvinfo,
|
|
};
|
|
|
|
/*
|
|
* Does not allocate but creates a /proc entry.
|
|
* Allowed to fail.
|
|
*/
|
|
static int bond_init(struct net_device *bond_dev, struct bond_params *params)
|
|
{
|
|
struct bonding *bond = bond_dev->priv;
|
|
|
|
dprintk("Begin bond_init for %s\n", bond_dev->name);
|
|
|
|
/* initialize rwlocks */
|
|
rwlock_init(&bond->lock);
|
|
rwlock_init(&bond->curr_slave_lock);
|
|
|
|
bond->params = *params; /* copy params struct */
|
|
|
|
bond->wq = create_singlethread_workqueue(bond_dev->name);
|
|
if (!bond->wq)
|
|
return -ENOMEM;
|
|
|
|
/* Initialize pointers */
|
|
bond->first_slave = NULL;
|
|
bond->curr_active_slave = NULL;
|
|
bond->current_arp_slave = NULL;
|
|
bond->primary_slave = NULL;
|
|
bond->dev = bond_dev;
|
|
bond->send_grat_arp = 0;
|
|
bond->setup_by_slave = 0;
|
|
INIT_LIST_HEAD(&bond->vlan_list);
|
|
|
|
/* Initialize the device entry points */
|
|
bond_dev->open = bond_open;
|
|
bond_dev->stop = bond_close;
|
|
bond_dev->get_stats = bond_get_stats;
|
|
bond_dev->do_ioctl = bond_do_ioctl;
|
|
bond_dev->ethtool_ops = &bond_ethtool_ops;
|
|
bond_dev->set_multicast_list = bond_set_multicast_list;
|
|
bond_dev->change_mtu = bond_change_mtu;
|
|
bond_dev->set_mac_address = bond_set_mac_address;
|
|
bond_dev->validate_addr = NULL;
|
|
|
|
bond_set_mode_ops(bond, bond->params.mode);
|
|
|
|
bond_dev->destructor = free_netdev;
|
|
|
|
/* Initialize the device options */
|
|
bond_dev->tx_queue_len = 0;
|
|
bond_dev->flags |= IFF_MASTER|IFF_MULTICAST;
|
|
bond_dev->priv_flags |= IFF_BONDING;
|
|
|
|
/* At first, we block adding VLANs. That's the only way to
|
|
* prevent problems that occur when adding VLANs over an
|
|
* empty bond. The block will be removed once non-challenged
|
|
* slaves are enslaved.
|
|
*/
|
|
bond_dev->features |= NETIF_F_VLAN_CHALLENGED;
|
|
|
|
/* 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
|
|
*/
|
|
bond_dev->vlan_rx_register = bond_vlan_rx_register;
|
|
bond_dev->vlan_rx_add_vid = bond_vlan_rx_add_vid;
|
|
bond_dev->vlan_rx_kill_vid = bond_vlan_rx_kill_vid;
|
|
bond_dev->features |= (NETIF_F_HW_VLAN_TX |
|
|
NETIF_F_HW_VLAN_RX |
|
|
NETIF_F_HW_VLAN_FILTER);
|
|
|
|
#ifdef CONFIG_PROC_FS
|
|
bond_create_proc_entry(bond);
|
|
#endif
|
|
list_add_tail(&bond->bond_list, &bond_dev_list);
|
|
|
|
return 0;
|
|
}
|
|
|
|
/* De-initialize device specific data.
|
|
* Caller must hold rtnl_lock.
|
|
*/
|
|
static void bond_deinit(struct net_device *bond_dev)
|
|
{
|
|
struct bonding *bond = bond_dev->priv;
|
|
|
|
list_del(&bond->bond_list);
|
|
|
|
#ifdef CONFIG_PROC_FS
|
|
bond_remove_proc_entry(bond);
|
|
#endif
|
|
}
|
|
|
|
static void bond_work_cancel_all(struct bonding *bond)
|
|
{
|
|
write_lock_bh(&bond->lock);
|
|
bond->kill_timers = 1;
|
|
write_unlock_bh(&bond->lock);
|
|
|
|
if (bond->params.miimon && delayed_work_pending(&bond->mii_work))
|
|
cancel_delayed_work(&bond->mii_work);
|
|
|
|
if (bond->params.arp_interval && delayed_work_pending(&bond->arp_work))
|
|
cancel_delayed_work(&bond->arp_work);
|
|
|
|
if (bond->params.mode == BOND_MODE_ALB &&
|
|
delayed_work_pending(&bond->alb_work))
|
|
cancel_delayed_work(&bond->alb_work);
|
|
|
|
if (bond->params.mode == BOND_MODE_8023AD &&
|
|
delayed_work_pending(&bond->ad_work))
|
|
cancel_delayed_work(&bond->ad_work);
|
|
}
|
|
|
|
/* Unregister and free all bond devices.
|
|
* Caller must hold rtnl_lock.
|
|
*/
|
|
static void bond_free_all(void)
|
|
{
|
|
struct bonding *bond, *nxt;
|
|
|
|
list_for_each_entry_safe(bond, nxt, &bond_dev_list, bond_list) {
|
|
struct net_device *bond_dev = bond->dev;
|
|
|
|
bond_work_cancel_all(bond);
|
|
netif_tx_lock_bh(bond_dev);
|
|
bond_mc_list_destroy(bond);
|
|
netif_tx_unlock_bh(bond_dev);
|
|
/* Release the bonded slaves */
|
|
bond_release_all(bond_dev);
|
|
bond_destroy(bond);
|
|
}
|
|
|
|
#ifdef CONFIG_PROC_FS
|
|
bond_destroy_proc_dir();
|
|
#endif
|
|
}
|
|
|
|
/*------------------------- Module initialization ---------------------------*/
|
|
|
|
/*
|
|
* Convert string input module parms. Accept either the
|
|
* number of the mode or its string name. A bit complicated because
|
|
* some mode names are substrings of other names, and calls from sysfs
|
|
* may have whitespace in the name (trailing newlines, for example).
|
|
*/
|
|
int bond_parse_parm(const char *buf, struct bond_parm_tbl *tbl)
|
|
{
|
|
int mode = -1, i, rv;
|
|
char *p, modestr[BOND_MAX_MODENAME_LEN + 1] = { 0, };
|
|
|
|
for (p = (char *)buf; *p; p++)
|
|
if (!(isdigit(*p) || isspace(*p)))
|
|
break;
|
|
|
|
if (*p)
|
|
rv = sscanf(buf, "%20s", modestr);
|
|
else
|
|
rv = sscanf(buf, "%d", &mode);
|
|
|
|
if (!rv)
|
|
return -1;
|
|
|
|
for (i = 0; tbl[i].modename; i++) {
|
|
if (mode == tbl[i].mode)
|
|
return tbl[i].mode;
|
|
if (strcmp(modestr, tbl[i].modename) == 0)
|
|
return tbl[i].mode;
|
|
}
|
|
|
|
return -1;
|
|
}
|
|
|
|
static int bond_check_params(struct bond_params *params)
|
|
{
|
|
int arp_validate_value;
|
|
|
|
/*
|
|
* Convert string parameters.
|
|
*/
|
|
if (mode) {
|
|
bond_mode = bond_parse_parm(mode, bond_mode_tbl);
|
|
if (bond_mode == -1) {
|
|
printk(KERN_ERR DRV_NAME
|
|
": Error: Invalid bonding mode \"%s\"\n",
|
|
mode == NULL ? "NULL" : mode);
|
|
return -EINVAL;
|
|
}
|
|
}
|
|
|
|
if (xmit_hash_policy) {
|
|
if ((bond_mode != BOND_MODE_XOR) &&
|
|
(bond_mode != BOND_MODE_8023AD)) {
|
|
printk(KERN_INFO DRV_NAME
|
|
": xor_mode param is irrelevant in mode %s\n",
|
|
bond_mode_name(bond_mode));
|
|
} else {
|
|
xmit_hashtype = bond_parse_parm(xmit_hash_policy,
|
|
xmit_hashtype_tbl);
|
|
if (xmit_hashtype == -1) {
|
|
printk(KERN_ERR DRV_NAME
|
|
": Error: Invalid xmit_hash_policy \"%s\"\n",
|
|
xmit_hash_policy == NULL ? "NULL" :
|
|
xmit_hash_policy);
|
|
return -EINVAL;
|
|
}
|
|
}
|
|
}
|
|
|
|
if (lacp_rate) {
|
|
if (bond_mode != BOND_MODE_8023AD) {
|
|
printk(KERN_INFO DRV_NAME
|
|
": lacp_rate param is irrelevant in mode %s\n",
|
|
bond_mode_name(bond_mode));
|
|
} else {
|
|
lacp_fast = bond_parse_parm(lacp_rate, bond_lacp_tbl);
|
|
if (lacp_fast == -1) {
|
|
printk(KERN_ERR DRV_NAME
|
|
": Error: Invalid lacp rate \"%s\"\n",
|
|
lacp_rate == NULL ? "NULL" : lacp_rate);
|
|
return -EINVAL;
|
|
}
|
|
}
|
|
}
|
|
|
|
if (max_bonds < 1 || max_bonds > INT_MAX) {
|
|
printk(KERN_WARNING DRV_NAME
|
|
": Warning: max_bonds (%d) not in range %d-%d, so it "
|
|
"was reset to BOND_DEFAULT_MAX_BONDS (%d)\n",
|
|
max_bonds, 1, INT_MAX, BOND_DEFAULT_MAX_BONDS);
|
|
max_bonds = BOND_DEFAULT_MAX_BONDS;
|
|
}
|
|
|
|
if (miimon < 0) {
|
|
printk(KERN_WARNING DRV_NAME
|
|
": Warning: miimon module parameter (%d), "
|
|
"not in range 0-%d, so it was reset to %d\n",
|
|
miimon, INT_MAX, BOND_LINK_MON_INTERV);
|
|
miimon = BOND_LINK_MON_INTERV;
|
|
}
|
|
|
|
if (updelay < 0) {
|
|
printk(KERN_WARNING DRV_NAME
|
|
": 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) {
|
|
printk(KERN_WARNING DRV_NAME
|
|
": 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)) {
|
|
printk(KERN_WARNING DRV_NAME
|
|
": Warning: use_carrier module parameter (%d), "
|
|
"not of valid value (0/1), so it was set to 1\n",
|
|
use_carrier);
|
|
use_carrier = 1;
|
|
}
|
|
|
|
/* reset values for 802.3ad */
|
|
if (bond_mode == BOND_MODE_8023AD) {
|
|
if (!miimon) {
|
|
printk(KERN_WARNING DRV_NAME
|
|
": Warning: miimon must be specified, "
|
|
"otherwise bonding will not detect link "
|
|
"failure, speed and duplex which are "
|
|
"essential for 802.3ad operation\n");
|
|
printk(KERN_WARNING "Forcing miimon to 100msec\n");
|
|
miimon = 100;
|
|
}
|
|
}
|
|
|
|
/* reset values for TLB/ALB */
|
|
if ((bond_mode == BOND_MODE_TLB) ||
|
|
(bond_mode == BOND_MODE_ALB)) {
|
|
if (!miimon) {
|
|
printk(KERN_WARNING DRV_NAME
|
|
": Warning: miimon must be specified, "
|
|
"otherwise bonding will not detect link "
|
|
"failure and link speed which are essential "
|
|
"for TLB/ALB load balancing\n");
|
|
printk(KERN_WARNING "Forcing miimon to 100msec\n");
|
|
miimon = 100;
|
|
}
|
|
}
|
|
|
|
if (bond_mode == BOND_MODE_ALB) {
|
|
printk(KERN_NOTICE DRV_NAME
|
|
": 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...
|
|
*/
|
|
printk(KERN_WARNING DRV_NAME
|
|
": 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) {
|
|
printk(KERN_WARNING DRV_NAME
|
|
": 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) {
|
|
printk(KERN_WARNING DRV_NAME
|
|
": 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) {
|
|
printk(KERN_WARNING DRV_NAME
|
|
": 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) {
|
|
printk(KERN_WARNING DRV_NAME
|
|
": Warning: arp_interval module parameter (%d) "
|
|
", not in range 0-%d, so it was reset to %d\n",
|
|
arp_interval, INT_MAX, BOND_LINK_ARP_INTERV);
|
|
arp_interval = BOND_LINK_ARP_INTERV;
|
|
}
|
|
|
|
for (arp_ip_count = 0;
|
|
(arp_ip_count < BOND_MAX_ARP_TARGETS) && arp_ip_target[arp_ip_count];
|
|
arp_ip_count++) {
|
|
/* not complete check, but should be good enough to
|
|
catch mistakes */
|
|
if (!isdigit(arp_ip_target[arp_ip_count][0])) {
|
|
printk(KERN_WARNING DRV_NAME
|
|
": Warning: bad arp_ip_target module parameter "
|
|
"(%s), ARP monitoring will not be performed\n",
|
|
arp_ip_target[arp_ip_count]);
|
|
arp_interval = 0;
|
|
} else {
|
|
__be32 ip = in_aton(arp_ip_target[arp_ip_count]);
|
|
arp_target[arp_ip_count] = ip;
|
|
}
|
|
}
|
|
|
|
if (arp_interval && !arp_ip_count) {
|
|
/* don't allow arping if no arp_ip_target given... */
|
|
printk(KERN_WARNING DRV_NAME
|
|
": 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 (bond_mode != BOND_MODE_ACTIVEBACKUP) {
|
|
printk(KERN_ERR DRV_NAME
|
|
": arp_validate only supported in active-backup mode\n");
|
|
return -EINVAL;
|
|
}
|
|
if (!arp_interval) {
|
|
printk(KERN_ERR DRV_NAME
|
|
": arp_validate requires arp_interval\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
arp_validate_value = bond_parse_parm(arp_validate,
|
|
arp_validate_tbl);
|
|
if (arp_validate_value == -1) {
|
|
printk(KERN_ERR DRV_NAME
|
|
": Error: invalid arp_validate \"%s\"\n",
|
|
arp_validate == NULL ? "NULL" : arp_validate);
|
|
return -EINVAL;
|
|
}
|
|
} else
|
|
arp_validate_value = 0;
|
|
|
|
if (miimon) {
|
|
printk(KERN_INFO DRV_NAME
|
|
": MII link monitoring set to %d ms\n",
|
|
miimon);
|
|
} else if (arp_interval) {
|
|
int i;
|
|
|
|
printk(KERN_INFO DRV_NAME
|
|
": ARP monitoring set to %d ms, validate %s, with %d target(s):",
|
|
arp_interval,
|
|
arp_validate_tbl[arp_validate_value].modename,
|
|
arp_ip_count);
|
|
|
|
for (i = 0; i < arp_ip_count; i++)
|
|
printk (" %s", arp_ip_target[i]);
|
|
|
|
printk("\n");
|
|
|
|
} else {
|
|
/* miimon and arp_interval not set, we need one so things
|
|
* work as expected, see bonding.txt for details
|
|
*/
|
|
printk(KERN_WARNING DRV_NAME
|
|
": 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 && !USES_PRIMARY(bond_mode)) {
|
|
/* currently, using a primary only makes sense
|
|
* in active backup, TLB or ALB modes
|
|
*/
|
|
printk(KERN_WARNING DRV_NAME
|
|
": Warning: %s primary device specified but has no "
|
|
"effect in %s mode\n",
|
|
primary, bond_mode_name(bond_mode));
|
|
primary = NULL;
|
|
}
|
|
|
|
if (fail_over_mac && (bond_mode != BOND_MODE_ACTIVEBACKUP))
|
|
printk(KERN_WARNING DRV_NAME
|
|
": Warning: fail_over_mac only affects "
|
|
"active-backup mode.\n");
|
|
|
|
/* fill params struct with the proper values */
|
|
params->mode = bond_mode;
|
|
params->xmit_policy = xmit_hashtype;
|
|
params->miimon = miimon;
|
|
params->arp_interval = arp_interval;
|
|
params->arp_validate = arp_validate_value;
|
|
params->updelay = updelay;
|
|
params->downdelay = downdelay;
|
|
params->use_carrier = use_carrier;
|
|
params->lacp_fast = lacp_fast;
|
|
params->primary[0] = 0;
|
|
params->fail_over_mac = fail_over_mac;
|
|
|
|
if (primary) {
|
|
strncpy(params->primary, primary, IFNAMSIZ);
|
|
params->primary[IFNAMSIZ - 1] = 0;
|
|
}
|
|
|
|
memcpy(params->arp_targets, arp_target, sizeof(arp_target));
|
|
|
|
return 0;
|
|
}
|
|
|
|
static struct lock_class_key bonding_netdev_xmit_lock_key;
|
|
|
|
/* 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(char *name, struct bond_params *params, struct bonding **newbond)
|
|
{
|
|
struct net_device *bond_dev;
|
|
struct bonding *bond, *nxt;
|
|
int res;
|
|
|
|
rtnl_lock();
|
|
down_write(&bonding_rwsem);
|
|
|
|
/* Check to see if the bond already exists. */
|
|
if (name) {
|
|
list_for_each_entry_safe(bond, nxt, &bond_dev_list, bond_list)
|
|
if (strnicmp(bond->dev->name, name, IFNAMSIZ) == 0) {
|
|
printk(KERN_ERR DRV_NAME
|
|
": cannot add bond %s; it already exists\n",
|
|
name);
|
|
res = -EPERM;
|
|
goto out_rtnl;
|
|
}
|
|
}
|
|
|
|
bond_dev = alloc_netdev(sizeof(struct bonding), name ? name : "",
|
|
ether_setup);
|
|
if (!bond_dev) {
|
|
printk(KERN_ERR DRV_NAME
|
|
": %s: eek! can't alloc netdev!\n",
|
|
name);
|
|
res = -ENOMEM;
|
|
goto out_rtnl;
|
|
}
|
|
|
|
if (!name) {
|
|
res = dev_alloc_name(bond_dev, "bond%d");
|
|
if (res < 0)
|
|
goto out_netdev;
|
|
}
|
|
|
|
/* bond_init() must be called after dev_alloc_name() (for the
|
|
* /proc files), but before register_netdevice(), because we
|
|
* need to set function pointers.
|
|
*/
|
|
|
|
res = bond_init(bond_dev, params);
|
|
if (res < 0) {
|
|
goto out_netdev;
|
|
}
|
|
|
|
res = register_netdevice(bond_dev);
|
|
if (res < 0) {
|
|
goto out_bond;
|
|
}
|
|
|
|
lockdep_set_class(&bond_dev->_xmit_lock, &bonding_netdev_xmit_lock_key);
|
|
|
|
if (newbond)
|
|
*newbond = bond_dev->priv;
|
|
|
|
netif_carrier_off(bond_dev);
|
|
|
|
up_write(&bonding_rwsem);
|
|
rtnl_unlock(); /* allows sysfs registration of net device */
|
|
res = bond_create_sysfs_entry(bond_dev->priv);
|
|
if (res < 0) {
|
|
rtnl_lock();
|
|
down_write(&bonding_rwsem);
|
|
goto out_bond;
|
|
}
|
|
|
|
return 0;
|
|
|
|
out_bond:
|
|
bond_deinit(bond_dev);
|
|
out_netdev:
|
|
free_netdev(bond_dev);
|
|
out_rtnl:
|
|
up_write(&bonding_rwsem);
|
|
rtnl_unlock();
|
|
return res;
|
|
}
|
|
|
|
static int __init bonding_init(void)
|
|
{
|
|
int i;
|
|
int res;
|
|
struct bonding *bond, *nxt;
|
|
|
|
printk(KERN_INFO "%s", version);
|
|
|
|
res = bond_check_params(&bonding_defaults);
|
|
if (res) {
|
|
goto out;
|
|
}
|
|
|
|
#ifdef CONFIG_PROC_FS
|
|
bond_create_proc_dir();
|
|
#endif
|
|
|
|
init_rwsem(&bonding_rwsem);
|
|
|
|
for (i = 0; i < max_bonds; i++) {
|
|
res = bond_create(NULL, &bonding_defaults, NULL);
|
|
if (res)
|
|
goto err;
|
|
}
|
|
|
|
res = bond_create_sysfs();
|
|
if (res)
|
|
goto err;
|
|
|
|
register_netdevice_notifier(&bond_netdev_notifier);
|
|
register_inetaddr_notifier(&bond_inetaddr_notifier);
|
|
|
|
goto out;
|
|
err:
|
|
list_for_each_entry_safe(bond, nxt, &bond_dev_list, bond_list) {
|
|
bond_work_cancel_all(bond);
|
|
destroy_workqueue(bond->wq);
|
|
}
|
|
|
|
rtnl_lock();
|
|
bond_free_all();
|
|
bond_destroy_sysfs();
|
|
rtnl_unlock();
|
|
out:
|
|
return res;
|
|
|
|
}
|
|
|
|
static void __exit bonding_exit(void)
|
|
{
|
|
unregister_netdevice_notifier(&bond_netdev_notifier);
|
|
unregister_inetaddr_notifier(&bond_inetaddr_notifier);
|
|
|
|
rtnl_lock();
|
|
bond_free_all();
|
|
bond_destroy_sysfs();
|
|
rtnl_unlock();
|
|
}
|
|
|
|
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");
|
|
MODULE_SUPPORTED_DEVICE("most ethernet devices");
|
|
|
|
/*
|
|
* Local variables:
|
|
* c-indent-level: 8
|
|
* c-basic-offset: 8
|
|
* tab-width: 8
|
|
* End:
|
|
*/
|
|
|