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bonding: add arp_ip_target netlink support

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Add IFLA_BOND_ARP_IP_TARGET to allow get/set of bonding parameter
arp_ip_target via netlink.

Signed-off-by: Scott Feldman <sfeldma@cumulusnetworks.com>
Signed-off-by: Jiri Pirko <jiri@resnulli.us>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
sfeldma@cumulusnetworks.com 2013-12-12 14:10:31 -08:00 committed by David S. Miller
parent 06151dbcf3
commit 7f28fa10e2
5 changed files with 187 additions and 68 deletions
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36
drivers/net/bonding/bond_netlink.c
View File

@ -29,6 +29,7 @@ static const struct nla_policy bond_policy[IFLA_BOND_MAX + 1] = {
[IFLA_BOND_DOWNDELAY] = { .type = NLA_U32 },
[IFLA_BOND_USE_CARRIER] = { .type = NLA_U8 },
[IFLA_BOND_ARP_INTERVAL] = { .type = NLA_U32 },
[IFLA_BOND_ARP_IP_TARGET] = { .type = NLA_NESTED },
};
static int bond_validate(struct nlattr *tb[], struct nlattr *data[])
@ -116,6 +117,20 @@ static int bond_changelink(struct net_device *bond_dev,
if (err)
return err;
}
if (data[IFLA_BOND_ARP_IP_TARGET]) {
__be32 targets[BOND_MAX_ARP_TARGETS] = { 0, };
struct nlattr *attr;
int i = 0, rem;
nla_for_each_nested(attr, data[IFLA_BOND_ARP_IP_TARGET], rem) {
__be32 target = nla_get_u32(attr);
targets[i++] = target;
}
err = bond_option_arp_ip_targets_set(bond, targets, i);
if (err)
return err;
}
return 0;
}
@ -140,6 +155,8 @@ static size_t bond_get_size(const struct net_device *bond_dev)
nla_total_size(sizeof(u32)) + /* IFLA_BOND_DOWNDELAY */
nla_total_size(sizeof(u8)) + /* IFLA_BOND_USE_CARRIER */
nla_total_size(sizeof(u32)) + /* IFLA_BOND_ARP_INTERVAL */
/* IFLA_BOND_ARP_IP_TARGET */
nla_total_size(sizeof(u32)) * BOND_MAX_ARP_TARGETS +
0;
}
@ -148,6 +165,8 @@ static int bond_fill_info(struct sk_buff *skb,
{
struct bonding *bond = netdev_priv(bond_dev);
struct net_device *slave_dev = bond_option_active_slave_get(bond);
struct nlattr *targets;
int i, targets_added;
if (nla_put_u8(skb, IFLA_BOND_MODE, bond->params.mode))
goto nla_put_failure;
@ -173,6 +192,23 @@ static int bond_fill_info(struct sk_buff *skb,
if (nla_put_u32(skb, IFLA_BOND_ARP_INTERVAL, bond->params.arp_interval))
goto nla_put_failure;
targets = nla_nest_start(skb, IFLA_BOND_ARP_IP_TARGET);
if (!targets)
goto nla_put_failure;
targets_added = 0;
for (i = 0; i < BOND_MAX_ARP_TARGETS; i++) {
if (bond->params.arp_targets[i]) {
nla_put_u32(skb, i, bond->params.arp_targets[i]);
targets_added = 1;
}
}
if (targets_added)
nla_nest_end(skb, targets);
else
nla_nest_cancel(skb, targets);
return 0;
nla_put_failure:

130
drivers/net/bonding/bond_options.c
View File

@ -306,3 +306,133 @@ int bond_option_arp_interval_set(struct bonding *bond, int arp_interval)
return 0;
}
static void _bond_options_arp_ip_target_set(struct bonding *bond, int slot,
__be32 target,
unsigned long last_rx)
{
__be32 *targets = bond->params.arp_targets;
struct list_head *iter;
struct slave *slave;
if (slot >= 0 && slot < BOND_MAX_ARP_TARGETS) {
bond_for_each_slave(bond, slave, iter)
slave->target_last_arp_rx[slot] = last_rx;
targets[slot] = target;
}
}
static int _bond_option_arp_ip_target_add(struct bonding *bond, __be32 target)
{
__be32 *targets = bond->params.arp_targets;
int ind;
if (IS_IP_TARGET_UNUSABLE_ADDRESS(target)) {
pr_err("%s: invalid ARP target %pI4 specified for addition\n",
bond->dev->name, &target);
return -EINVAL;
}
if (bond_get_targets_ip(targets, target) != -1) { /* dup */
pr_err("%s: ARP target %pI4 is already present\n",
bond->dev->name, &target);
return -EINVAL;
}
ind = bond_get_targets_ip(targets, 0); /* first free slot */
if (ind == -1) {
pr_err("%s: ARP target table is full!\n",
bond->dev->name);
return -EINVAL;
}
pr_info("%s: adding ARP target %pI4.\n", bond->dev->name, &target);
_bond_options_arp_ip_target_set(bond, ind, target, jiffies);
return 0;
}
int bond_option_arp_ip_target_add(struct bonding *bond, __be32 target)
{
int ret;
/* not to race with bond_arp_rcv */
write_lock_bh(&bond->lock);
ret = _bond_option_arp_ip_target_add(bond, target);
write_unlock_bh(&bond->lock);
return ret;
}
int bond_option_arp_ip_target_rem(struct bonding *bond, __be32 target)
{
__be32 *targets = bond->params.arp_targets;
struct list_head *iter;
struct slave *slave;
unsigned long *targets_rx;
int ind, i;
if (IS_IP_TARGET_UNUSABLE_ADDRESS(target)) {
pr_err("%s: invalid ARP target %pI4 specified for removal\n",
bond->dev->name, &target);
return -EINVAL;
}
ind = bond_get_targets_ip(targets, target);
if (ind == -1) {
pr_err("%s: unable to remove nonexistent ARP target %pI4.\n",
bond->dev->name, &target);
return -EINVAL;
}
if (ind == 0 && !targets[1] && bond->params.arp_interval)
pr_warn("%s: removing last arp target with arp_interval on\n",
bond->dev->name);
pr_info("%s: removing ARP target %pI4.\n", bond->dev->name,
&target);
/* not to race with bond_arp_rcv */
write_lock_bh(&bond->lock);
bond_for_each_slave(bond, slave, iter) {
targets_rx = slave->target_last_arp_rx;
for (i = ind; (i < BOND_MAX_ARP_TARGETS-1) && targets[i+1]; i++)
targets_rx[i] = targets_rx[i+1];
targets_rx[i] = 0;
}
for (i = ind; (i < BOND_MAX_ARP_TARGETS-1) && targets[i+1]; i++)
targets[i] = targets[i+1];
targets[i] = 0;
write_unlock_bh(&bond->lock);
return 0;
}
int bond_option_arp_ip_targets_set(struct bonding *bond, __be32 *targets,
int count)
{
int i, ret = 0;
/* not to race with bond_arp_rcv */
write_lock_bh(&bond->lock);
/* clear table */
for (i = 0; i < BOND_MAX_ARP_TARGETS; i++)
_bond_options_arp_ip_target_set(bond, i, 0, 0);
if (count == 0 && bond->params.arp_interval)
pr_warn("%s: removing last arp target with arp_interval on\n",
bond->dev->name);
for (i = 0; i < count; i++) {
ret = _bond_option_arp_ip_target_add(bond, targets[i]);
if (ret)
break;
}
write_unlock_bh(&bond->lock);
return ret;
}

82
drivers/net/bonding/bond_sysfs.c
View File

@ -552,81 +552,29 @@ static ssize_t bonding_store_arp_targets(struct device *d,
const char *buf, size_t count)
{
struct bonding *bond = to_bond(d);
struct list_head *iter;
struct slave *slave;
__be32 newtarget, *targets;
unsigned long *targets_rx;
int ind, i, j, ret = -EINVAL;
__be32 target;
int ret = -EPERM;
if (!in4_pton(buf + 1, -1, (u8 *)&target, -1, NULL)) {
pr_err("%s: invalid ARP target %pI4 specified\n",
bond->dev->name, &target);
return -EPERM;
}
if (!rtnl_trylock())
return restart_syscall();
targets = bond->params.arp_targets;
if (!in4_pton(buf + 1, -1, (u8 *)&newtarget, -1, NULL) ||
IS_IP_TARGET_UNUSABLE_ADDRESS(newtarget)) {
pr_err("%s: invalid ARP target %pI4 specified for addition\n",
bond->dev->name, &newtarget);
goto out;
}
/* look for adds */
if (buf[0] == '+') {
if (bond_get_targets_ip(targets, newtarget) != -1) { /* dup */
pr_err("%s: ARP target %pI4 is already present\n",
bond->dev->name, &newtarget);
goto out;
}
ind = bond_get_targets_ip(targets, 0); /* first free slot */
if (ind == -1) {
pr_err("%s: ARP target table is full!\n",
bond->dev->name);
goto out;
}
pr_info("%s: adding ARP target %pI4.\n", bond->dev->name,
&newtarget);
/* not to race with bond_arp_rcv */
write_lock_bh(&bond->lock);
bond_for_each_slave(bond, slave, iter)
slave->target_last_arp_rx[ind] = jiffies;
targets[ind] = newtarget;
write_unlock_bh(&bond->lock);
} else if (buf[0] == '-') {
ind = bond_get_targets_ip(targets, newtarget);
if (ind == -1) {
pr_err("%s: unable to remove nonexistent ARP target %pI4.\n",
bond->dev->name, &newtarget);
goto out;
}
if (ind == 0 && !targets[1] && bond->params.arp_interval)
pr_warn("%s: removing last arp target with arp_interval on\n",
bond->dev->name);
pr_info("%s: removing ARP target %pI4.\n", bond->dev->name,
&newtarget);
write_lock_bh(&bond->lock);
bond_for_each_slave(bond, slave, iter) {
targets_rx = slave->target_last_arp_rx;
j = ind;
for (; (j < BOND_MAX_ARP_TARGETS-1) && targets[j+1]; j++)
targets_rx[j] = targets_rx[j+1];
targets_rx[j] = 0;
}
for (i = ind; (i < BOND_MAX_ARP_TARGETS-1) && targets[i+1]; i++)
targets[i] = targets[i+1];
targets[i] = 0;
write_unlock_bh(&bond->lock);
} else {
if (buf[0] == '+')
ret = bond_option_arp_ip_target_add(bond, target);
else if (buf[0] == '-')
ret = bond_option_arp_ip_target_rem(bond, target);
else
pr_err("no command found in arp_ip_targets file for bond %s. Use +<addr> or -<addr>.\n",
bond->dev->name);
ret = -EPERM;
goto out;
}
if (!ret)
ret = count;
out:
rtnl_unlock();
return ret;
}

4
drivers/net/bonding/bonding.h
View File

@ -444,6 +444,10 @@ int bond_option_updelay_set(struct bonding *bond, int updelay);
int bond_option_downdelay_set(struct bonding *bond, int downdelay);
int bond_option_use_carrier_set(struct bonding *bond, int use_carrier);
int bond_option_arp_interval_set(struct bonding *bond, int arp_interval);
int bond_option_arp_ip_targets_set(struct bonding *bond, __be32 *targets,
int count);
int bond_option_arp_ip_target_add(struct bonding *bond, __be32 target);
int bond_option_arp_ip_target_rem(struct bonding *bond, __be32 target);
struct net_device *bond_option_active_slave_get_rcu(struct bonding *bond);
struct net_device *bond_option_active_slave_get(struct bonding *bond);

1
include/uapi/linux/if_link.h
View File

@ -336,6 +336,7 @@ enum {
IFLA_BOND_DOWNDELAY,
IFLA_BOND_USE_CARRIER,
IFLA_BOND_ARP_INTERVAL,
IFLA_BOND_ARP_IP_TARGET,
__IFLA_BOND_MAX,
};