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mac802154: iface: check concurrent ifaces

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This patch adds a check for concurrent interfaces while calling
interface up. This avoids to have different mac parameters on one phy.
Otherwise it could be that a interface can overwrite current phy mac
settings which is set by an another interface.

Signed-off-by: Alexander Aring <alex.aring@gmail.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
This commit is contained in:
Alexander Aring 2014-12-19 23:45:58 +01:00 committed by Marcel Holtmann
parent 405a26110a
commit bd37a78de9
1 changed files with 77 additions and 0 deletions
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77
net/mac802154/iface.c
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@ -175,6 +175,79 @@ err:
return res;
}
static int
ieee802154_check_mac_settings(struct ieee802154_local *local,
struct wpan_dev *wpan_dev,
struct wpan_dev *nwpan_dev)
{
ASSERT_RTNL();
if (local->hw.flags & IEEE802154_HW_PROMISCUOUS) {
if (wpan_dev->promiscuous_mode != nwpan_dev->promiscuous_mode)
return -EBUSY;
}
if (local->hw.flags & IEEE802154_HW_AFILT) {
if (wpan_dev->pan_id != nwpan_dev->pan_id)
return -EBUSY;
if (wpan_dev->short_addr != nwpan_dev->short_addr)
return -EBUSY;
if (wpan_dev->extended_addr != nwpan_dev->extended_addr)
return -EBUSY;
}
if (local->hw.flags & IEEE802154_HW_CSMA_PARAMS) {
if (wpan_dev->min_be != nwpan_dev->min_be)
return -EBUSY;
if (wpan_dev->max_be != nwpan_dev->max_be)
return -EBUSY;
if (wpan_dev->csma_retries != nwpan_dev->csma_retries)
return -EBUSY;
}
if (local->hw.flags & IEEE802154_HW_FRAME_RETRIES) {
if (wpan_dev->frame_retries != nwpan_dev->frame_retries)
return -EBUSY;
}
if (local->hw.flags & IEEE802154_HW_LBT) {
if (wpan_dev->lbt != nwpan_dev->lbt)
return -EBUSY;
}
return 0;
}
static int
ieee802154_check_concurrent_iface(struct ieee802154_sub_if_data *sdata,
enum nl802154_iftype iftype)
{
struct ieee802154_local *local = sdata->local;
struct wpan_dev *wpan_dev = &sdata->wpan_dev;
struct ieee802154_sub_if_data *nsdata;
/* we hold the RTNL here so can safely walk the list */
list_for_each_entry(nsdata, &local->interfaces, list) {
if (nsdata != sdata && ieee802154_sdata_running(nsdata)) {
int ret;
/* check all phy mac sublayer settings are the same.
* We have only one phy, different values makes trouble.
*/
ret = ieee802154_check_mac_settings(local, wpan_dev,
&nsdata->wpan_dev);
if (ret < 0)
return ret;
}
}
return 0;
}
static int mac802154_wpan_open(struct net_device *dev)
{
int rc;
@ -183,6 +256,10 @@ static int mac802154_wpan_open(struct net_device *dev)
struct wpan_dev *wpan_dev = &sdata->wpan_dev;
struct wpan_phy *phy = sdata->local->phy;
rc = ieee802154_check_concurrent_iface(sdata, sdata->vif.type);
if (rc < 0)
return rc;
rc = mac802154_slave_open(dev);
if (rc < 0)
return rc;