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cfg80211/mac80211: move more combination checks to mac80211

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Get rid of the cfg80211_can_add_interface() and
cfg80211_can_change_interface() functions by moving that functionality
to mac80211.  With this patch all interface combination checks are now
out of cfg80211 (except for the channel switch case which will be
addressed in a future commit).

Additionally, modify the ieee80211_check_combinations() function so
that an undefined chandef can be passed, in order to use it before a
channel is defined.

Signed-off-by: Luciano Coelho <luciano.coelho@intel.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
This commit is contained in:
Luciano Coelho 2014-02-27 11:07:21 +02:00 committed by Johannes Berg
parent 71965c1d04
commit b6a550156b
7 changed files with 26 additions and 42 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

9
net/mac80211/cfg.c
View File

@ -109,6 +109,15 @@ static int ieee80211_change_iface(struct wiphy *wiphy,
static int ieee80211_start_p2p_device(struct wiphy *wiphy,
struct wireless_dev *wdev)
{
struct ieee80211_sub_if_data *sdata = IEEE80211_WDEV_TO_SUB_IF(wdev);
int ret;
mutex_lock(&sdata->local->chanctx_mtx);
ret = ieee80211_check_combinations(sdata, NULL, 0, 0);
mutex_unlock(&sdata->local->chanctx_mtx);
if (ret < 0)
return ret;
return ieee80211_do_open(wdev, true);
}

6
net/mac80211/iface.c
View File

@ -250,6 +250,7 @@ static int ieee80211_check_concurrent_iface(struct ieee80211_sub_if_data *sdata,
{
struct ieee80211_local *local = sdata->local;
struct ieee80211_sub_if_data *nsdata;
int ret;
ASSERT_RTNL();
@ -300,7 +301,10 @@ static int ieee80211_check_concurrent_iface(struct ieee80211_sub_if_data *sdata,
}
}
return 0;
mutex_lock(&local->chanctx_mtx);
ret = ieee80211_check_combinations(sdata, NULL, 0, 0);
mutex_unlock(&local->chanctx_mtx);
return ret;
}
static int ieee80211_check_queues(struct ieee80211_sub_if_data *sdata,

10
net/mac80211/util.c
View File

@ -2808,7 +2808,7 @@ int ieee80211_check_combinations(struct ieee80211_sub_if_data *sdata,
enum nl80211_iftype iftype = sdata->wdev.iftype;
int num[NUM_NL80211_IFTYPES];
struct ieee80211_chanctx *ctx;
int num_different_channels = 1;
int num_different_channels = 0;
int total = 1;
lockdep_assert_held(&local->chanctx_mtx);
@ -2816,9 +2816,13 @@ int ieee80211_check_combinations(struct ieee80211_sub_if_data *sdata,
if (WARN_ON(hweight32(radar_detect) > 1))
return -EINVAL;
if (WARN_ON(chanmode == IEEE80211_CHANCTX_SHARED && !chandef->chan))
if (WARN_ON(chandef && chanmode == IEEE80211_CHANCTX_SHARED &&
!chandef->chan))
return -EINVAL;
if (chandef)
num_different_channels = 1;
if (WARN_ON(iftype >= NUM_NL80211_IFTYPES))
return -EINVAL;
@ -2841,7 +2845,7 @@ int ieee80211_check_combinations(struct ieee80211_sub_if_data *sdata,
num_different_channels++;
continue;
}
if ((chanmode == IEEE80211_CHANCTX_SHARED) &&
if (chandef && chanmode == IEEE80211_CHANCTX_SHARED &&
cfg80211_chandef_compatible(chandef,
&ctx->conf.def))
continue;

11
net/wireless/core.c
View File

@ -439,10 +439,7 @@ static int wiphy_verify_combinations(struct wiphy *wiphy)
for (j = 0; j < c->n_limits; j++) {
u16 types = c->limits[j].types;
/*
* interface types shouldn't overlap, this is
* used in cfg80211_can_change_interface()
*/
/* interface types shouldn't overlap */
if (WARN_ON(types & all_iftypes))
return -EINVAL;
all_iftypes |= types;
@ -840,7 +837,6 @@ static int cfg80211_netdev_notifier_call(struct notifier_block *nb,
struct net_device *dev = netdev_notifier_info_to_dev(ptr);
struct wireless_dev *wdev = dev->ieee80211_ptr;
struct cfg80211_registered_device *rdev;
int ret;
if (!wdev)
return NOTIFY_DONE;
@ -1003,9 +999,8 @@ static int cfg80211_netdev_notifier_call(struct notifier_block *nb,
case NETDEV_PRE_UP:
if (!(wdev->wiphy->interface_modes & BIT(wdev->iftype)))
return notifier_from_errno(-EOPNOTSUPP);
ret = cfg80211_can_add_interface(rdev, wdev->iftype);
if (ret)
return notifier_from_errno(ret);
if (rfkill_blocked(rdev->rfkill))
return notifier_from_errno(-ERFKILL);
break;
}

22
net/wireless/core.h
View File

@ -412,28 +412,6 @@ unsigned int
cfg80211_chandef_dfs_cac_time(struct wiphy *wiphy,
const struct cfg80211_chan_def *chandef);
static inline int
cfg80211_can_change_interface(struct cfg80211_registered_device *rdev,
struct wireless_dev *wdev,
enum nl80211_iftype iftype)
{
/* TODO: For this function, we'll probably need to keep some
* kind of interface combination check in cfg80211...
*/
return cfg80211_can_use_iftype_chan(rdev, wdev, iftype, NULL,
CHAN_MODE_UNDEFINED, 0);
}
static inline int
cfg80211_can_add_interface(struct cfg80211_registered_device *rdev,
enum nl80211_iftype iftype)
{
if (rfkill_blocked(rdev->rfkill))
return -ERFKILL;
return cfg80211_can_change_interface(rdev, NULL, iftype);
}
static inline unsigned int elapsed_jiffies_msecs(unsigned long start)
{
unsigned long end = jiffies;

5
net/wireless/nl80211.c
View File

@ -8969,9 +8969,8 @@ static int nl80211_start_p2p_device(struct sk_buff *skb, struct genl_info *info)
if (wdev->p2p_started)
return 0;
err = cfg80211_can_add_interface(rdev, wdev->iftype);
if (err)
return err;
if (rfkill_blocked(rdev->rfkill))
return -ERFKILL;
err = rdev_start_p2p_device(rdev, wdev);
if (err)

5
net/wireless/util.c
View File

@ -888,11 +888,6 @@ int cfg80211_change_iface(struct cfg80211_registered_device *rdev,
return -EBUSY;
if (ntype != otype && netif_running(dev)) {
err = cfg80211_can_change_interface(rdev, dev->ieee80211_ptr,
ntype);
if (err)
return err;
dev->ieee80211_ptr->use_4addr = false;
dev->ieee80211_ptr->mesh_id_up_len = 0;
wdev_lock(dev->ieee80211_ptr);