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cfg80211: add channel checking for iface combinations

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.connect cannot be handled since the driver scans
and connects on its own. It is up to the driver
then to refuse a connection (with -EBUSY for
example).

Non-fixed channel IBSSes always take a single
channel resource. For example two non-fixed
channel IBSSes always take up 2
num_different_channels, even if they operate on
the same channel at a given point of time.

Signed-off-by: Michal Kazior <michal.kazior@tieto.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
This commit is contained in:
Michal Kazior
2012-06-29 12:47:07 +02:00
committed by Johannes Berg
parent 2e165b8184
commit d4e50c5917
3 changed files with 88 additions and 8 deletions
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29
net/wireless/core.h
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@@ -428,9 +428,20 @@ int cfg80211_change_iface(struct cfg80211_registered_device *rdev,
u32 *flags, struct vif_params *params);
void cfg80211_process_rdev_events(struct cfg80211_registered_device *rdev);
int cfg80211_can_change_interface(struct cfg80211_registered_device *rdev,
struct wireless_dev *wdev,
enum nl80211_iftype iftype);
int cfg80211_can_use_iftype_chan(struct cfg80211_registered_device *rdev,
struct wireless_dev *wdev,
enum nl80211_iftype iftype,
struct ieee80211_channel *chan,
enum cfg80211_chan_mode chanmode);
static inline int
cfg80211_can_change_interface(struct cfg80211_registered_device *rdev,
struct wireless_dev *wdev,
enum nl80211_iftype iftype)
{
return cfg80211_can_use_iftype_chan(rdev, wdev, iftype, NULL,
CHAN_MODE_UNDEFINED);
}
static inline int
cfg80211_can_add_interface(struct cfg80211_registered_device *rdev,
@@ -439,6 +450,16 @@ cfg80211_can_add_interface(struct cfg80211_registered_device *rdev,
return cfg80211_can_change_interface(rdev, NULL, iftype);
}
static inline int
cfg80211_can_use_chan(struct cfg80211_registered_device *rdev,
struct wireless_dev *wdev,
struct ieee80211_channel *chan,
enum cfg80211_chan_mode chanmode)
{
return cfg80211_can_use_iftype_chan(rdev, wdev, wdev->iftype,
chan, chanmode);
}
void
cfg80211_get_chan_state(struct cfg80211_registered_device *rdev,
struct wireless_dev *wdev,
@@ -461,6 +482,8 @@ int cfg80211_validate_beacon_int(struct cfg80211_registered_device *rdev,
void cfg80211_update_iface_num(struct cfg80211_registered_device *rdev,
enum nl80211_iftype iftype, int num);
#define CFG80211_MAX_NUM_DIFFERENT_CHANNELS 10
#ifdef CONFIG_CFG80211_DEVELOPER_WARNINGS
#define CFG80211_DEV_WARN_ON(cond) WARN_ON(cond)
#else