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nl80211: Allow set network namespace by fd 

Added new NL80211_ATTR_NETNS_FD which allows to
set namespace via nl80211 by fd.

Signed-off-by: Vadim Kochan <vadim4j@gmail.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
This commit is contained in:
Vadim Kochan 2015-01-12 16:34:05 +02:00 committed by Johannes Berg
parent fa7e1fbcb5
commit 4b681c82d2
3 changed files with 14 additions and 5 deletions
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2
include/uapi/linux/nl80211.h
View File

@ -2098,6 +2098,8 @@ enum nl80211_attrs {
NL80211_ATTR_SURVEY_RADIO_STATS,
NL80211_ATTR_NETNS_FD,
/* add attributes here, update the policy in nl80211.c */
__NL80211_ATTR_AFTER_LAST,

1
net/core/net_namespace.c
View File

@ -361,6 +361,7 @@ struct net *get_net_ns_by_fd(int fd)
return ERR_PTR(-EINVAL);
}
#endif
EXPORT_SYMBOL_GPL(get_net_ns_by_fd);
struct net *get_net_ns_by_pid(pid_t pid)
{

16
net/wireless/nl80211.c
View File

@ -397,6 +397,7 @@ static const struct nla_policy nl80211_policy[NUM_NL80211_ATTR] = {
[NL80211_ATTR_SMPS_MODE] = { .type = NLA_U8 },
[NL80211_ATTR_MAC_MASK] = { .len = ETH_ALEN },
[NL80211_ATTR_WIPHY_SELF_MANAGED_REG] = { .type = NLA_FLAG },
[NL80211_ATTR_NETNS_FD] = { .type = NLA_U32 },
};
/* policy for the key attributes */
@ -7762,14 +7763,19 @@ static int nl80211_wiphy_netns(struct sk_buff *skb, struct genl_info *info)
struct cfg80211_registered_device *rdev = info->user_ptr[0];
struct net *net;
int err;
u32 pid;
if (!info->attrs[NL80211_ATTR_PID])
if (info->attrs[NL80211_ATTR_PID]) {
u32 pid = nla_get_u32(info->attrs[NL80211_ATTR_PID]);
net = get_net_ns_by_pid(pid);
} else if (info->attrs[NL80211_ATTR_NETNS_FD]) {
u32 fd = nla_get_u32(info->attrs[NL80211_ATTR_NETNS_FD]);
net = get_net_ns_by_fd(fd);
} else {
return -EINVAL;
}
pid = nla_get_u32(info->attrs[NL80211_ATTR_PID]);
net = get_net_ns_by_pid(pid);
if (IS_ERR(net))
return PTR_ERR(net);