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Date: Thu, 07 Nov 2013 01:43:15 -0800
From: Scott Feldman <sfeldma@...ulusnetworks.com>
To: vfalico@...hat.com, fubar@...ibm.com, andy@...yhouse.net
Cc: netdev@...r.kernel.org, shm@...ulusnetworks.com
Subject: [PATCH net-next 4/8] bonding: add use_carrier netlink support
Add IFLA_BOND_USE_CARRIER to allow get/set of bonding parameter
use_carrier via netlink.
Signed-off-by: Scott Feldman <sfeldma@...ulusnetworks.com>
---
drivers/net/bonding/bond_netlink.c | 12 ++++++++++++
drivers/net/bonding/bond_options.c | 14 ++++++++++++++
drivers/net/bonding/bond_sysfs.c | 24 +++++++++++-------------
drivers/net/bonding/bonding.h | 1 +
include/uapi/linux/if_link.h | 1 +
5 files changed, 39 insertions(+), 13 deletions(-)
diff --git a/drivers/net/bonding/bond_netlink.c b/drivers/net/bonding/bond_netlink.c
index e684713..4f81d87 100644
--- a/drivers/net/bonding/bond_netlink.c
+++ b/drivers/net/bonding/bond_netlink.c
@@ -27,6 +27,7 @@ static const struct nla_policy bond_policy[IFLA_BOND_MAX + 1] = {
[IFLA_BOND_MIIMON] = { .type = NLA_U32 },
[IFLA_BOND_UPDELAY] = { .type = NLA_U32 },
[IFLA_BOND_DOWNDELAY] = { .type = NLA_U32 },
+ [IFLA_BOND_USE_CARRIER] = { .type = NLA_U8 },
};
static int bond_validate(struct nlattr *tb[], struct nlattr *data[])
@@ -93,6 +94,13 @@ static int bond_changelink(struct net_device *bond_dev,
if (err)
return err;
}
+ if (data[IFLA_BOND_USE_CARRIER]) {
+ int use_carrier = nla_get_u8(data[IFLA_BOND_USE_CARRIER]);
+
+ err = bond_option_use_carrier_set(bond, use_carrier);
+ if (err)
+ return err;
+ }
return 0;
}
@@ -115,6 +123,7 @@ static size_t bond_get_size(const struct net_device *bond_dev)
nla_total_size(sizeof(u32)) + /* IFLA_BOND_MIIMON */
nla_total_size(sizeof(u32)) + /* IFLA_BOND_UPDELAY */
nla_total_size(sizeof(u32)) + /* IFLA_BOND_DOWNDELAY */
+ nla_total_size(sizeof(u8)) + /* IFLA_BOND_USE_CARRIER */
0;
}
@@ -140,6 +149,9 @@ static int bond_fill_info(struct sk_buff *skb,
if (nla_put_u32(skb, IFLA_BOND_DOWNDELAY, bond->params.downdelay))
goto nla_put_failure;
+ if (nla_put_u8(skb, IFLA_BOND_USE_CARRIER, bond->params.use_carrier))
+ goto nla_put_failure;
+
return 0;
nla_put_failure:
diff --git a/drivers/net/bonding/bond_options.c b/drivers/net/bonding/bond_options.c
index 738be5f..8743d6b 100644
--- a/drivers/net/bonding/bond_options.c
+++ b/drivers/net/bonding/bond_options.c
@@ -240,3 +240,17 @@ int bond_option_downdelay_set(struct bonding *bond, int downdelay)
return 0;
}
+
+int bond_option_use_carrier_set(struct bonding *bond, int use_carrier)
+{
+ if ((use_carrier == 0) || (use_carrier == 1)) {
+ bond->params.use_carrier = use_carrier;
+ pr_info("%s: Setting use_carrier to %d.\n",
+ bond->dev->name, use_carrier);
+ } else {
+ pr_info("%s: Ignoring invalid use_carrier value %d.\n",
+ bond->dev->name, use_carrier);
+ }
+
+ return 0;
+}
diff --git a/drivers/net/bonding/bond_sysfs.c b/drivers/net/bonding/bond_sysfs.c
index 41a62ac..c74d430 100644
--- a/drivers/net/bonding/bond_sysfs.c
+++ b/drivers/net/bonding/bond_sysfs.c
@@ -1114,25 +1114,23 @@ static ssize_t bonding_store_carrier(struct device *d,
struct device_attribute *attr,
const char *buf, size_t count)
{
- int new_value, ret = count;
+ int new_value, ret;
struct bonding *bond = to_bond(d);
-
if (sscanf(buf, "%d", &new_value) != 1) {
pr_err("%s: no use_carrier value specified.\n",
bond->dev->name);
- ret = -EINVAL;
- goto out;
- }
- if ((new_value == 0) || (new_value == 1)) {
- bond->params.use_carrier = new_value;
- pr_info("%s: Setting use_carrier to %d.\n",
- bond->dev->name, new_value);
- } else {
- pr_info("%s: Ignoring invalid use_carrier value %d.\n",
- bond->dev->name, new_value);
+ return -EINVAL;
}
-out:
+
+ if (!rtnl_trylock())
+ return restart_syscall();
+
+ ret = bond_option_use_carrier_set(bond, new_value);
+ if (!ret)
+ ret = count;
+
+ rtnl_unlock();
return ret;
}
static DEVICE_ATTR(use_carrier, S_IRUGO | S_IWUSR,
diff --git a/drivers/net/bonding/bonding.h b/drivers/net/bonding/bonding.h
index 40987f3..1f3aef6 100644
--- a/drivers/net/bonding/bonding.h
+++ b/drivers/net/bonding/bonding.h
@@ -431,6 +431,7 @@ int bond_option_active_slave_set(struct bonding *bond, struct net_device *slave_
int bond_option_miimon_set(struct bonding *bond, int miimon);
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);
struct net_device *bond_option_active_slave_get_rcu(struct bonding *bond);
struct net_device *bond_option_active_slave_get(struct bonding *bond);
diff --git a/include/uapi/linux/if_link.h b/include/uapi/linux/if_link.h
index a372831..6101db7 100644
--- a/include/uapi/linux/if_link.h
+++ b/include/uapi/linux/if_link.h
@@ -334,6 +334,7 @@ enum {
IFLA_BOND_MIIMON,
IFLA_BOND_UPDELAY,
IFLA_BOND_DOWNDELAY,
+ IFLA_BOND_USE_CARRIER,
__IFLA_BOND_MAX,
};
--
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