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/*
* Copyright (c) 2012 Mellanox Technologies. - All rights reserved.
*
* This software is available to you under a choice of one of two
* licenses. You may choose to be licensed under the terms of the GNU
* General Public License (GPL) Version 2, available from the file
* COPYING in the main directory of this source tree, or the
* OpenIB.org BSD license below:
*
* Redistribution and use in source and binary forms, with or
* without modification, are permitted provided that the following
* conditions are met:
*
* - Redistributions of source code must retain the above
* copyright notice, this list of conditions and the following
* disclaimer.
*
* - Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following
* disclaimer in the documentation and/or other materials
* provided with the distribution.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
#include <linux/netdevice.h>
#include <linux/if_arp.h> /* For ARPHRD_xxx */
#include <linux/module.h>
#include <net/rtnetlink.h>
#include "ipoib.h"
static const struct nla_policy ipoib_policy[IFLA_IPOIB_MAX + 1] = {
[IFLA_IPOIB_PKEY] = { .type = NLA_U16 },
[IFLA_IPOIB_MODE] = { .type = NLA_U16 },
[IFLA_IPOIB_UMCAST] = { .type = NLA_U16 },
};
static int ipoib_fill_info(struct sk_buff *skb, const struct net_device *dev)
{
struct ipoib_dev_priv *priv = ipoib_priv(dev);
u16 val;
if (nla_put_u16(skb, IFLA_IPOIB_PKEY, priv->pkey))
goto nla_put_failure;
val = test_bit(IPOIB_FLAG_ADMIN_CM, &priv->flags);
if (nla_put_u16(skb, IFLA_IPOIB_MODE, val))
goto nla_put_failure;
val = test_bit(IPOIB_FLAG_UMCAST, &priv->flags);
if (nla_put_u16(skb, IFLA_IPOIB_UMCAST, val))
goto nla_put_failure;
return 0;
nla_put_failure:
return -EMSGSIZE;
}
static int ipoib_changelink(struct net_device *dev,
struct nlattr *tb[], struct nlattr *data[])
{
u16 mode, umcast;
int ret = 0;
if (data[IFLA_IPOIB_MODE]) {
mode = nla_get_u16(data[IFLA_IPOIB_MODE]);
if (mode == IPOIB_MODE_DATAGRAM)
ret = ipoib_set_mode(dev, "datagram\n");
else if (mode == IPOIB_MODE_CONNECTED)
ret = ipoib_set_mode(dev, "connected\n");
else
ret = -EINVAL;
if (ret < 0)
goto out_err;
}
if (data[IFLA_IPOIB_UMCAST]) {
umcast = nla_get_u16(data[IFLA_IPOIB_UMCAST]);
ipoib_set_umcast(dev, umcast);
}
out_err:
return ret;
}
static int ipoib_new_child_link(struct net *src_net, struct net_device *dev,
struct nlattr *tb[], struct nlattr *data[])
{
struct net_device *pdev;
struct ipoib_dev_priv *ppriv;
u16 child_pkey;
int err;
if (!tb[IFLA_LINK])
return -EINVAL;
pdev = __dev_get_by_index(src_net, nla_get_u32(tb[IFLA_LINK]));
if (!pdev || pdev->type != ARPHRD_INFINIBAND)
return -ENODEV;
ppriv = ipoib_priv(pdev);
if (test_bit(IPOIB_FLAG_SUBINTERFACE, &ppriv->flags)) {
ipoib_warn(ppriv, "child creation disallowed for child devices\n");
return -EINVAL;
}
if (!data || !data[IFLA_IPOIB_PKEY]) {
ipoib_dbg(ppriv, "no pkey specified, using parent pkey\n");
child_pkey = ppriv->pkey;
} else
child_pkey = nla_get_u16(data[IFLA_IPOIB_PKEY]);
if (child_pkey == 0 || child_pkey == 0x8000)
return -EINVAL;
/*
* Set the full membership bit, so that we join the right
* broadcast group, etc.
*/
child_pkey |= 0x8000;
err = __ipoib_vlan_add(ppriv, ipoib_priv(dev),
child_pkey, IPOIB_RTNL_CHILD);
if (!err && data)
err = ipoib_changelink(dev, tb, data);
return err;
}
static void ipoib_unregister_child_dev(struct net_device *dev, struct list_head *head)
{
struct ipoib_dev_priv *priv, *ppriv;
priv = ipoib_priv(dev);
ppriv = ipoib_priv(priv->parent);
down_write(&ppriv->vlan_rwsem);
unregister_netdevice_queue(dev, head);
list_del(&priv->list);
up_write(&ppriv->vlan_rwsem);
}
static size_t ipoib_get_size(const struct net_device *dev)
{
return nla_total_size(2) + /* IFLA_IPOIB_PKEY */
nla_total_size(2) + /* IFLA_IPOIB_MODE */
nla_total_size(2); /* IFLA_IPOIB_UMCAST */
}
static struct rtnl_link_ops ipoib_link_ops __read_mostly = {
.kind = "ipoib",
.maxtype = IFLA_IPOIB_MAX,
.policy = ipoib_policy,
.priv_size = sizeof(struct ipoib_dev_priv),
.setup = ipoib_setup_common,
.newlink = ipoib_new_child_link,
.changelink = ipoib_changelink,
.dellink = ipoib_unregister_child_dev,
.get_size = ipoib_get_size,
.fill_info = ipoib_fill_info,
};
int __init ipoib_netlink_init(void)
{
return rtnl_link_register(&ipoib_link_ops);
}
void __exit ipoib_netlink_fini(void)
{
rtnl_link_unregister(&ipoib_link_ops);
}
MODULE_ALIAS_RTNL_LINK("ipoib");
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