diff options
| -rw-r--r-- | Documentation/networking/bonding.txt | 33 | ||||
| -rw-r--r-- | drivers/net/bonding/bond_main.c | 57 | ||||
| -rw-r--r-- | drivers/net/bonding/bond_sysfs.c | 49 | ||||
| -rw-r--r-- | drivers/net/bonding/bonding.h | 6 |
4 files changed, 121 insertions, 24 deletions
diff --git a/Documentation/networking/bonding.txt b/Documentation/networking/bonding.txt index 1da566630831..11340625e363 100644 --- a/Documentation/networking/bonding.txt +++ b/Documentation/networking/bonding.txt @@ -281,6 +281,39 @@ downdelay will be rounded down to the nearest multiple. The default value is 0. +fail_over_mac + + Specifies whether active-backup mode should set all slaves to + the same MAC address (the traditional behavior), or, when + enabled, change the bond's MAC address when changing the + active interface (i.e., fail over the MAC address itself). + + Fail over MAC is useful for devices that cannot ever alter + their MAC address, or for devices that refuse incoming + broadcasts with their own source MAC (which interferes with + the ARP monitor). + + The down side of fail over MAC is that every device on the + network must be updated via gratuitous ARP, vs. just updating + a switch or set of switches (which often takes place for any + traffic, not just ARP traffic, if the switch snoops incoming + traffic to update its tables) for the traditional method. If + the gratuitous ARP is lost, communication may be disrupted. + + When fail over MAC is used in conjuction with the mii monitor, + devices which assert link up prior to being able to actually + transmit and receive are particularly susecptible to loss of + the gratuitous ARP, and an appropriate updelay setting may be + required. + + A value of 0 disables fail over MAC, and is the default. A + value of 1 enables fail over MAC. This option is enabled + automatically if the first slave added cannot change its MAC + address. This option may be modified via sysfs only when no + slaves are present in the bond. + + This option was added in bonding version 3.2.0. + lacp_rate Option specifying the rate in which we'll ask our link partner diff --git a/drivers/net/bonding/bond_main.c b/drivers/net/bonding/bond_main.c index 0e198dd87c20..db80f243dd37 100644 --- a/drivers/net/bonding/bond_main.c +++ b/drivers/net/bonding/bond_main.c @@ -98,6 +98,7 @@ static char *xmit_hash_policy = NULL; static int arp_interval = BOND_LINK_ARP_INTERV; static char *arp_ip_target[BOND_MAX_ARP_TARGETS] = { NULL, }; static char *arp_validate = NULL; +static int fail_over_mac = 0; struct bond_params bonding_defaults; module_param(max_bonds, int, 0); @@ -131,6 +132,8 @@ module_param_array(arp_ip_target, charp, NULL, 0); MODULE_PARM_DESC(arp_ip_target, "arp targets in n.n.n.n form"); module_param(arp_validate, charp, 0); MODULE_PARM_DESC(arp_validate, "validate src/dst of ARP probes: none (default), active, backup or all"); +module_param(fail_over_mac, int, 0); +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."); /*----------------------------- Global variables ----------------------------*/ @@ -1100,7 +1103,7 @@ void bond_change_active_slave(struct bonding *bond, struct slave *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->do_set_mac_addr) + 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 && @@ -1367,16 +1370,16 @@ int bond_enslave(struct net_device *bond_dev, struct net_device *slave_dev) if (slave_dev->set_mac_address == NULL) { if (bond->slave_cnt == 0) { printk(KERN_WARNING DRV_NAME - ": %s: Warning: The first slave device you " - "specified does not support setting the MAC " - "address. This bond MAC address would be that " - "of the active slave.\n", bond_dev->name); - bond->do_set_mac_addr = 0; - } else if (bond->do_set_mac_addr) { + ": %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 you specified " - "does not support setting the MAC addres,." - "but this bond uses this practice. \n" + ": %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; @@ -1401,7 +1404,7 @@ int bond_enslave(struct net_device *bond_dev, struct net_device *slave_dev) */ memcpy(new_slave->perm_hwaddr, slave_dev->dev_addr, ETH_ALEN); - if (bond->do_set_mac_addr) { + 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 @@ -1637,7 +1640,7 @@ err_close: dev_close(slave_dev); err_restore_mac: - if (bond->do_set_mac_addr) { + 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); @@ -1814,7 +1817,7 @@ int bond_release(struct net_device *bond_dev, struct net_device *slave_dev) /* close slave before restoring its mac address */ dev_close(slave_dev); - if (bond->do_set_mac_addr) { + 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; @@ -1935,7 +1938,7 @@ static int bond_release_all(struct net_device *bond_dev) /* close slave before restoring its mac address */ dev_close(slave_dev); - if (bond->do_set_mac_addr) { + 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; @@ -3060,9 +3063,15 @@ static void bond_info_show_master(struct seq_file *seq) curr = bond->curr_active_slave; read_unlock(&bond->curr_slave_lock); - seq_printf(seq, "Bonding Mode: %s\n", + 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", @@ -3994,8 +4003,12 @@ static int bond_set_mac_address(struct net_device *bond_dev, void *addr) dprintk("bond=%p, name=%s\n", bond, (bond_dev ? bond_dev->name : "None")); - if (!bond->do_set_mac_addr) - return -EOPNOTSUPP; + /* + * 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; @@ -4384,10 +4397,6 @@ static int bond_init(struct net_device *bond_dev, struct bond_params *params) #ifdef CONFIG_PROC_FS bond_create_proc_entry(bond); #endif - - /* set do_set_mac_addr to true on startup */ - bond->do_set_mac_addr = 1; - list_add_tail(&bond->bond_list, &bond_dev_list); return 0; @@ -4721,6 +4730,11 @@ static int bond_check_params(struct bond_params *params) 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; @@ -4732,6 +4746,7 @@ static int bond_check_params(struct bond_params *params) 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); diff --git a/drivers/net/bonding/bond_sysfs.c b/drivers/net/bonding/bond_sysfs.c index b5d2a13fe627..80c0c8c415ed 100644 --- a/drivers/net/bonding/bond_sysfs.c +++ b/drivers/net/bonding/bond_sysfs.c @@ -568,6 +568,54 @@ static ssize_t bonding_store_arp_validate(struct device *d, static DEVICE_ATTR(arp_validate, S_IRUGO | S_IWUSR, bonding_show_arp_validate, bonding_store_arp_validate); /* + * Show and store fail_over_mac. User only allowed to change the + * value when there are no slaves. + */ +static ssize_t bonding_show_fail_over_mac(struct device *d, struct device_attribute *attr, char *buf) +{ + struct bonding *bond = to_bond(d); + + return sprintf(buf, "%d\n", bond->params.fail_over_mac) + 1; +} + +static ssize_t bonding_store_fail_over_mac(struct device *d, struct device_attribute *attr, const char *buf, size_t count) +{ + int new_value; + int ret = count; + struct bonding *bond = to_bond(d); + + if (bond->slave_cnt != 0) { + printk(KERN_ERR DRV_NAME + ": %s: Can't alter fail_over_mac with slaves in bond.\n", + bond->dev->name); + ret = -EPERM; + goto out; + } + + if (sscanf(buf, "%d", &new_value) != 1) { + printk(KERN_ERR DRV_NAME + ": %s: no fail_over_mac value specified.\n", + bond->dev->name); + ret = -EINVAL; + goto out; + } + + if ((new_value == 0) || (new_value == 1)) { + bond->params.fail_over_mac = new_value; + printk(KERN_INFO DRV_NAME ": %s: Setting fail_over_mac to %d.\n", + bond->dev->name, new_value); + } else { + printk(KERN_INFO DRV_NAME + ": %s: Ignoring invalid fail_over_mac value %d.\n", + bond->dev->name, new_value); + } +out: + return ret; +} + +static DEVICE_ATTR(fail_over_mac, S_IRUGO | S_IWUSR, bonding_show_fail_over_mac, bonding_store_fail_over_mac); + +/* * Show and set the arp timer interval. There are two tricky bits * here. First, if ARP monitoring is activated, then we must disable * MII monitoring. Second, if the ARP timer isn't running, we must @@ -1388,6 +1436,7 @@ static DEVICE_ATTR(ad_partner_mac, S_IRUGO, bonding_show_ad_partner_mac, NULL); static struct attribute *per_bond_attrs[] = { &dev_attr_slaves.attr, &dev_attr_mode.attr, + &dev_attr_fail_over_mac.attr, &dev_attr_arp_validate.attr, &dev_attr_arp_interval.attr, &dev_attr_arp_ip_target.attr, diff --git a/drivers/net/bonding/bonding.h b/drivers/net/bonding/bonding.h index 85e579b0d6f4..a8bbd563265c 100644 --- a/drivers/net/bonding/bonding.h +++ b/drivers/net/bonding/bonding.h @@ -22,8 +22,8 @@ #include "bond_3ad.h" #include "bond_alb.h" -#define DRV_VERSION "3.1.3" -#define DRV_RELDATE "June 13, 2007" +#define DRV_VERSION "3.2.0" +#define DRV_RELDATE "September 13, 2007" #define DRV_NAME "bonding" #define DRV_DESCRIPTION "Ethernet Channel Bonding Driver" @@ -128,6 +128,7 @@ struct bond_params { int arp_interval; int arp_validate; int use_carrier; + int fail_over_mac; int updelay; int downdelay; int lacp_fast; @@ -186,7 +187,6 @@ struct bonding { struct timer_list mii_timer; struct timer_list arp_timer; s8 kill_timers; - s8 do_set_mac_addr; s8 send_grat_arp; s8 setup_by_slave; struct net_device_stats stats; |