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net/bonding: Optionally allow ethernet slaves to keep own MAC

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Update the "don't change MAC of slaves" functionality added in
previous changes to be a generic option, rather than something tied to
IB devices, as it's occasionally useful for regular ethernet devices as
well.

	Adds "fail_over_mac" option (which is automatically enabled for IB
slaves), applicable only to active-backup mode.

	Includes documentation update.

	Updates bonding driver version to 3.2.0.

Signed-off-by: Jay Vosburgh <fubar@us.ibm.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
This commit is contained in:
Jay Vosburgh
2007-10-09 19:57:24 -07:00
committed by Jeff Garzik
parent d90a162a4e
commit dd957c57c5
4 changed files with 121 additions and 24 deletions
Download Patch File Download Diff File Expand all files Collapse all files

57
drivers/net/bonding/bond_main.c
View File

@@ -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);

49
drivers/net/bonding/bond_sysfs.c
View File

@@ -567,6 +567,54 @@ 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
@@ -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,

6
drivers/net/bonding/bonding.h
View File

@@ -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;