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nl80211: Broadcast CMD_NEW_INTERFACE and CMD_DEL_INTERFACE

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Let the other listeners being notified when a new or del interface
command has been issued, thus reducing later necessary request to be in
sync with current context.

Signed-off-by: Tomasz Bursztyka <tomasz.bursztyka@linux.intel.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
This commit is contained in:
Tomasz Bursztyka 2014-11-12 16:26:45 +02:00 committed by Johannes Berg
parent 93d638d49c
commit 8f894be2df
1 changed files with 41 additions and 7 deletions
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48
net/wireless/nl80211.c
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@ -2345,12 +2345,16 @@ static int nl80211_send_chandef(struct sk_buff *msg,
static int nl80211_send_iface(struct sk_buff *msg, u32 portid, u32 seq, int flags,
struct cfg80211_registered_device *rdev,
struct wireless_dev *wdev)
struct wireless_dev *wdev, bool removal)
{
struct net_device *dev = wdev->netdev;
u8 cmd = NL80211_CMD_NEW_INTERFACE;
void *hdr;
hdr = nl80211hdr_put(msg, portid, seq, flags, NL80211_CMD_NEW_INTERFACE);
if (removal)
cmd = NL80211_CMD_DEL_INTERFACE;
hdr = nl80211hdr_put(msg, portid, seq, flags, cmd);
if (!hdr)
return -1;
@ -2417,7 +2421,7 @@ static int nl80211_dump_interface(struct sk_buff *skb, struct netlink_callback *
}
if (nl80211_send_iface(skb, NETLINK_CB(cb->skb).portid,
cb->nlh->nlmsg_seq, NLM_F_MULTI,
rdev, wdev) < 0) {
rdev, wdev, false) < 0) {
goto out;
}
if_idx++;
@ -2445,7 +2449,7 @@ static int nl80211_get_interface(struct sk_buff *skb, struct genl_info *info)
return -ENOMEM;
if (nl80211_send_iface(msg, info->snd_portid, info->snd_seq, 0,
rdev, wdev) < 0) {
rdev, wdev, false) < 0) {
nlmsg_free(msg);
return -ENOBUFS;
}
@ -2591,7 +2595,7 @@ static int nl80211_new_interface(struct sk_buff *skb, struct genl_info *info)
struct cfg80211_registered_device *rdev = info->user_ptr[0];
struct vif_params params;
struct wireless_dev *wdev;
struct sk_buff *msg;
struct sk_buff *msg, *event;
int err;
enum nl80211_iftype type = NL80211_IFTYPE_UNSPECIFIED;
u32 flags;
@ -2689,11 +2693,25 @@ static int nl80211_new_interface(struct sk_buff *skb, struct genl_info *info)
}
if (nl80211_send_iface(msg, info->snd_portid, info->snd_seq, 0,
rdev, wdev) < 0) {
rdev, wdev, false) < 0) {
nlmsg_free(msg);
return -ENOBUFS;
}
event = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
if (event) {
if (nl80211_send_iface(event, 0, 0, 0,
rdev, wdev, false) < 0) {
nlmsg_free(event);
goto out;
}
genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy),
event, 0, NL80211_MCGRP_CONFIG,
GFP_KERNEL);
}
out:
return genlmsg_reply(msg, info);
}
@ -2701,10 +2719,18 @@ static int nl80211_del_interface(struct sk_buff *skb, struct genl_info *info)
{
struct cfg80211_registered_device *rdev = info->user_ptr[0];
struct wireless_dev *wdev = info->user_ptr[1];
struct sk_buff *msg;
int status;
if (!rdev->ops->del_virtual_intf)
return -EOPNOTSUPP;
msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
if (msg && nl80211_send_iface(msg, 0, 0, 0, rdev, wdev, true) < 0) {
nlmsg_free(msg);
msg = NULL;
}
/*
* If we remove a wireless device without a netdev then clear
* user_ptr[1] so that nl80211_post_doit won't dereference it
@ -2715,7 +2741,15 @@ static int nl80211_del_interface(struct sk_buff *skb, struct genl_info *info)
if (!wdev->netdev)
info->user_ptr[1] = NULL;
return rdev_del_virtual_intf(rdev, wdev);
status = rdev_del_virtual_intf(rdev, wdev);
if (status >= 0 && msg)
genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy),
msg, 0, NL80211_MCGRP_CONFIG,
GFP_KERNEL);
else
nlmsg_free(msg);
return status;
}
static int nl80211_set_noack_map(struct sk_buff *skb, struct genl_info *info)