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ieee802154: add netns support

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This patch adds netns support for 802.15.4 subsystem. Most parts are
copy&pasted from wireless subsystem, it has the identically userspace
API.

Cc: Nicolas Dichtel <nicolas.dichtel@6wind.com>
Reviewed-by: Stefan Schmidt <stefan@osg.samsung.com>
Signed-off-by: Alexander Aring <aar@pengutronix.de>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
This commit is contained in:
Alexander Aring 2016-06-18 10:45:34 +02:00 committed by Marcel Holtmann
parent aece0c3fe1
commit 66e5c2672c
5 changed files with 138 additions and 6 deletions
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13
include/net/cfg802154.h
View File

@ -219,9 +219,22 @@ struct wpan_phy {
struct device dev;
/* the network namespace this phy lives in currently */
possible_net_t _net;
char priv[0] __aligned(NETDEV_ALIGN);
};
static inline struct net *wpan_phy_net(struct wpan_phy *wpan_phy)
{
return read_pnet(&wpan_phy->_net);
}
static inline void wpan_phy_net_set(struct wpan_phy *wpan_phy, struct net *net)
{
write_pnet(&wpan_phy->_net, net);
}
struct ieee802154_addr {
u8 mode;
__le16 pan_id;

5
include/net/nl802154.h
View File

@ -54,6 +54,8 @@ enum nl802154_commands {
NL802154_CMD_SET_ACKREQ_DEFAULT,
NL802154_CMD_SET_WPAN_PHY_NETNS,
/* add new commands above here */
#ifdef CONFIG_IEEE802154_NL802154_EXPERIMENTAL
@ -126,6 +128,9 @@ enum nl802154_attrs {
NL802154_ATTR_PAD,
NL802154_ATTR_PID,
NL802154_ATTR_NETNS_FD,
/* add attributes here, update the policy in nl802154.c */
#ifdef CONFIG_IEEE802154_NL802154_EXPERIMENTAL

70
net/ieee802154/core.c
View File

@ -140,6 +140,8 @@ wpan_phy_new(const struct cfg802154_ops *ops, size_t priv_size)
rdev->wpan_phy.dev.class = &wpan_phy_class;
rdev->wpan_phy.dev.platform_data = rdev;
wpan_phy_net_set(&rdev->wpan_phy, &init_net);
init_waitqueue_head(&rdev->dev_wait);
return &rdev->wpan_phy;
@ -207,6 +209,49 @@ void wpan_phy_free(struct wpan_phy *phy)
}
EXPORT_SYMBOL(wpan_phy_free);
int cfg802154_switch_netns(struct cfg802154_registered_device *rdev,
struct net *net)
{
struct wpan_dev *wpan_dev;
int err = 0;
list_for_each_entry(wpan_dev, &rdev->wpan_dev_list, list) {
if (!wpan_dev->netdev)
continue;
wpan_dev->netdev->features &= ~NETIF_F_NETNS_LOCAL;
err = dev_change_net_namespace(wpan_dev->netdev, net, "wpan%d");
if (err)
break;
wpan_dev->netdev->features |= NETIF_F_NETNS_LOCAL;
}
if (err) {
/* failed -- clean up to old netns */
net = wpan_phy_net(&rdev->wpan_phy);
list_for_each_entry_continue_reverse(wpan_dev,
&rdev->wpan_dev_list,
list) {
if (!wpan_dev->netdev)
continue;
wpan_dev->netdev->features &= ~NETIF_F_NETNS_LOCAL;
err = dev_change_net_namespace(wpan_dev->netdev, net,
"wpan%d");
WARN_ON(err);
wpan_dev->netdev->features |= NETIF_F_NETNS_LOCAL;
}
return err;
}
wpan_phy_net_set(&rdev->wpan_phy, net);
err = device_rename(&rdev->wpan_phy.dev, dev_name(&rdev->wpan_phy.dev));
WARN_ON(err);
return 0;
}
void cfg802154_dev_free(struct cfg802154_registered_device *rdev)
{
kfree(rdev);
@ -286,14 +331,34 @@ static struct notifier_block cfg802154_netdev_notifier = {
.notifier_call = cfg802154_netdev_notifier_call,
};
static void __net_exit cfg802154_pernet_exit(struct net *net)
{
struct cfg802154_registered_device *rdev;
rtnl_lock();
list_for_each_entry(rdev, &cfg802154_rdev_list, list) {
if (net_eq(wpan_phy_net(&rdev->wpan_phy), net))
WARN_ON(cfg802154_switch_netns(rdev, &init_net));
}
rtnl_unlock();
}
static struct pernet_operations cfg802154_pernet_ops = {
.exit = cfg802154_pernet_exit,
};
static int __init wpan_phy_class_init(void)
{
int rc;
rc = wpan_phy_sysfs_init();
rc = register_pernet_device(&cfg802154_pernet_ops);
if (rc)
goto err;
rc = wpan_phy_sysfs_init();
if (rc)
goto err_sysfs;
rc = register_netdevice_notifier(&cfg802154_netdev_notifier);
if (rc)
goto err_nl;
@ -315,6 +380,8 @@ static int __init wpan_phy_class_init(void)
unregister_netdevice_notifier(&cfg802154_netdev_notifier);
err_nl:
wpan_phy_sysfs_exit();
err_sysfs:
unregister_pernet_device(&cfg802154_pernet_ops);
err:
return rc;
}
@ -326,6 +393,7 @@ static void __exit wpan_phy_class_exit(void)
ieee802154_nl_exit();
unregister_netdevice_notifier(&cfg802154_netdev_notifier);
wpan_phy_sysfs_exit();
unregister_pernet_device(&cfg802154_pernet_ops);
}
module_exit(wpan_phy_class_exit);

2
net/ieee802154/core.h
View File

@ -38,6 +38,8 @@ wpan_phy_to_rdev(struct wpan_phy *wpan_phy)
extern struct list_head cfg802154_rdev_list;
extern int cfg802154_rdev_list_generation;
int cfg802154_switch_netns(struct cfg802154_registered_device *rdev,
struct net *net);
/* free object */
void cfg802154_dev_free(struct cfg802154_registered_device *rdev);
struct cfg802154_registered_device *

54
net/ieee802154/nl802154.c
View File

@ -80,7 +80,8 @@ __cfg802154_wpan_dev_from_attrs(struct net *netns, struct nlattr **attrs)
list_for_each_entry(rdev, &cfg802154_rdev_list, list) {
struct wpan_dev *wpan_dev;
/* TODO netns compare */
if (wpan_phy_net(&rdev->wpan_phy) != netns)
continue;
if (have_wpan_dev_id && rdev->wpan_phy_idx != wpan_phy_idx)
continue;
@ -175,7 +176,8 @@ __cfg802154_rdev_from_attrs(struct net *netns, struct nlattr **attrs)
if (!rdev)
return ERR_PTR(-ENODEV);
/* TODO netns compare */
if (netns != wpan_phy_net(&rdev->wpan_phy))
return ERR_PTR(-ENODEV);
return rdev;
}
@ -233,6 +235,8 @@ static const struct nla_policy nl802154_policy[NL802154_ATTR_MAX+1] = {
[NL802154_ATTR_ACKREQ_DEFAULT] = { .type = NLA_U8 },
[NL802154_ATTR_PID] = { .type = NLA_U32 },
[NL802154_ATTR_NETNS_FD] = { .type = NLA_U32 },
#ifdef CONFIG_IEEE802154_NL802154_EXPERIMENTAL
[NL802154_ATTR_SEC_ENABLED] = { .type = NLA_U8, },
[NL802154_ATTR_SEC_OUT_LEVEL] = { .type = NLA_U32, },
@ -590,7 +594,6 @@ static int nl802154_dump_wpan_phy_parse(struct sk_buff *skb,
struct cfg802154_registered_device *rdev;
int ifidx = nla_get_u32(tb[NL802154_ATTR_IFINDEX]);
/* TODO netns */
netdev = __dev_get_by_index(&init_net, ifidx);
if (!netdev)
return -ENODEV;
@ -629,7 +632,8 @@ nl802154_dump_wpan_phy(struct sk_buff *skb, struct netlink_callback *cb)
}
list_for_each_entry(rdev, &cfg802154_rdev_list, list) {
/* TODO net ns compare */
if (!net_eq(wpan_phy_net(&rdev->wpan_phy), sock_net(skb->sk)))
continue;
if (++idx <= state->start)
continue;
if (state->filter_wpan_phy != -1 &&
@ -871,7 +875,8 @@ nl802154_dump_interface(struct sk_buff *skb, struct netlink_callback *cb)
rtnl_lock();
list_for_each_entry(rdev, &cfg802154_rdev_list, list) {
/* TODO netns compare */
if (!net_eq(wpan_phy_net(&rdev->wpan_phy), sock_net(skb->sk)))
continue;
if (wp_idx < wp_start) {
wp_idx++;
continue;
@ -1271,6 +1276,37 @@ nl802154_set_ackreq_default(struct sk_buff *skb, struct genl_info *info)
return rdev_set_ackreq_default(rdev, wpan_dev, ackreq);
}
static int nl802154_wpan_phy_netns(struct sk_buff *skb, struct genl_info *info)
{
struct cfg802154_registered_device *rdev = info->user_ptr[0];
struct net *net;
int err;
if (info->attrs[NL802154_ATTR_PID]) {
u32 pid = nla_get_u32(info->attrs[NL802154_ATTR_PID]);
net = get_net_ns_by_pid(pid);
} else if (info->attrs[NL802154_ATTR_NETNS_FD]) {
u32 fd = nla_get_u32(info->attrs[NL802154_ATTR_NETNS_FD]);
net = get_net_ns_by_fd(fd);
} else {
return -EINVAL;
}
if (IS_ERR(net))
return PTR_ERR(net);
err = 0;
/* check if anything to do */
if (!net_eq(wpan_phy_net(&rdev->wpan_phy), net))
err = cfg802154_switch_netns(rdev, net);
put_net(net);
return err;
}
#ifdef CONFIG_IEEE802154_NL802154_EXPERIMENTAL
static const struct nla_policy nl802154_dev_addr_policy[NL802154_DEV_ADDR_ATTR_MAX + 1] = {
[NL802154_DEV_ADDR_ATTR_PAN_ID] = { .type = NLA_U16 },
@ -2261,6 +2297,14 @@ static const struct genl_ops nl802154_ops[] = {
.internal_flags = NL802154_FLAG_NEED_WPAN_PHY |
NL802154_FLAG_NEED_RTNL,
},
{
.cmd = NL802154_CMD_SET_WPAN_PHY_NETNS,
.doit = nl802154_wpan_phy_netns,
.policy = nl802154_policy,
.flags = GENL_ADMIN_PERM,
.internal_flags = NL802154_FLAG_NEED_WPAN_PHY |
NL802154_FLAG_NEED_RTNL,
},
{
.cmd = NL802154_CMD_SET_PAN_ID,
.doit = nl802154_set_pan_id,