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authorJohannes Berg <johannes.berg@intel.com>2017-04-12 11:36:31 +0200
committerJohannes Berg <johannes.berg@intel.com>2017-04-13 13:41:39 +0200
commit1db77596e4c6b653f3cd001073a14dd09b8deb4a (patch)
tree30e7bd6d4e22c460044cc048fde35033993d9cca /net/wireless
parent818a986e4ebacea2020622e48c8bc04b7f500d89 (diff)
downloadlinux-1db77596e4c6b653f3cd001073a14dd09b8deb4a.tar.bz2
cfg80211: refactor nl80211 monitor option parsing
Refactor the parsing of monitor flags and the MU-MIMO options. This will allow adding more things cleanly in the future and also allows setting the latter already when creating a monitor interface. Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Diffstat (limited to 'net/wireless')
-rw-r--r--net/wireless/nl80211.c126
1 files changed, 70 insertions, 56 deletions
diff --git a/net/wireless/nl80211.c b/net/wireless/nl80211.c
index a07a55eda55b..671b635c0625 100644
--- a/net/wireless/nl80211.c
+++ b/net/wireless/nl80211.c
@@ -2731,6 +2731,69 @@ static int parse_monitor_flags(struct nlattr *nla, u32 *mntrflags)
return 0;
}
+static int nl80211_parse_mon_options(struct cfg80211_registered_device *rdev,
+ enum nl80211_iftype type,
+ struct genl_info *info,
+ struct vif_params *params)
+{
+ bool change = false;
+ int err;
+
+ if (info->attrs[NL80211_ATTR_MNTR_FLAGS]) {
+ if (type != NL80211_IFTYPE_MONITOR)
+ return -EINVAL;
+
+ err = parse_monitor_flags(info->attrs[NL80211_ATTR_MNTR_FLAGS],
+ &params->flags);
+ if (err)
+ return err;
+
+ change = true;
+ }
+
+ if (params->flags & MONITOR_FLAG_ACTIVE &&
+ !(rdev->wiphy.features & NL80211_FEATURE_ACTIVE_MONITOR))
+ return -EOPNOTSUPP;
+
+ if (info->attrs[NL80211_ATTR_MU_MIMO_GROUP_DATA]) {
+ const u8 *mumimo_groups;
+ u32 cap_flag = NL80211_EXT_FEATURE_MU_MIMO_AIR_SNIFFER;
+
+ if (type != NL80211_IFTYPE_MONITOR)
+ return -EINVAL;
+
+ if (!wiphy_ext_feature_isset(&rdev->wiphy, cap_flag))
+ return -EOPNOTSUPP;
+
+ mumimo_groups =
+ nla_data(info->attrs[NL80211_ATTR_MU_MIMO_GROUP_DATA]);
+
+ /* bits 0 and 63 are reserved and must be zero */
+ if ((mumimo_groups[0] & BIT(7)) ||
+ (mumimo_groups[VHT_MUMIMO_GROUPS_DATA_LEN - 1] & BIT(0)))
+ return -EINVAL;
+
+ params->vht_mumimo_groups = mumimo_groups;
+ change = true;
+ }
+
+ if (info->attrs[NL80211_ATTR_MU_MIMO_FOLLOW_MAC_ADDR]) {
+ u32 cap_flag = NL80211_EXT_FEATURE_MU_MIMO_AIR_SNIFFER;
+
+ if (type != NL80211_IFTYPE_MONITOR)
+ return -EINVAL;
+
+ if (!wiphy_ext_feature_isset(&rdev->wiphy, cap_flag))
+ return -EOPNOTSUPP;
+
+ params->vht_mumimo_follow_addr =
+ nla_data(info->attrs[NL80211_ATTR_MU_MIMO_FOLLOW_MAC_ADDR]);
+ change = true;
+ }
+
+ return change ? 1 : 0;
+}
+
static int nl80211_valid_4addr(struct cfg80211_registered_device *rdev,
struct net_device *netdev, u8 use_4addr,
enum nl80211_iftype iftype)
@@ -2806,50 +2869,11 @@ static int nl80211_set_interface(struct sk_buff *skb, struct genl_info *info)
params.use_4addr = -1;
}
- if (info->attrs[NL80211_ATTR_MNTR_FLAGS]) {
- if (ntype != NL80211_IFTYPE_MONITOR)
- return -EINVAL;
- err = parse_monitor_flags(info->attrs[NL80211_ATTR_MNTR_FLAGS],
- &params.flags);
- if (err)
- return err;
-
- change = true;
- }
-
- if (params.flags & MONITOR_FLAG_ACTIVE &&
- !(rdev->wiphy.features & NL80211_FEATURE_ACTIVE_MONITOR))
- return -EOPNOTSUPP;
-
- if (info->attrs[NL80211_ATTR_MU_MIMO_GROUP_DATA]) {
- const u8 *mumimo_groups;
- u32 cap_flag = NL80211_EXT_FEATURE_MU_MIMO_AIR_SNIFFER;
-
- if (!wiphy_ext_feature_isset(&rdev->wiphy, cap_flag))
- return -EOPNOTSUPP;
-
- mumimo_groups =
- nla_data(info->attrs[NL80211_ATTR_MU_MIMO_GROUP_DATA]);
-
- /* bits 0 and 63 are reserved and must be zero */
- if ((mumimo_groups[0] & BIT(7)) ||
- (mumimo_groups[VHT_MUMIMO_GROUPS_DATA_LEN - 1] & BIT(0)))
- return -EINVAL;
-
- params.vht_mumimo_groups = mumimo_groups;
- change = true;
- }
-
- if (info->attrs[NL80211_ATTR_MU_MIMO_FOLLOW_MAC_ADDR]) {
- u32 cap_flag = NL80211_EXT_FEATURE_MU_MIMO_AIR_SNIFFER;
-
- if (!wiphy_ext_feature_isset(&rdev->wiphy, cap_flag))
- return -EOPNOTSUPP;
-
- params.vht_mumimo_follow_addr =
- nla_data(info->attrs[NL80211_ATTR_MU_MIMO_FOLLOW_MAC_ADDR]);
+ err = nl80211_parse_mon_options(rdev, ntype, info, &params);
+ if (err < 0)
+ return err;
+ if (err > 0)
change = true;
- }
if (change)
err = cfg80211_change_iface(rdev, dev, ntype, &params);
@@ -2905,19 +2929,9 @@ static int nl80211_new_interface(struct sk_buff *skb, struct genl_info *info)
return err;
}
- if (info->attrs[NL80211_ATTR_MNTR_FLAGS]) {
- if (type != NL80211_IFTYPE_MONITOR)
- return -EINVAL;
-
- err = parse_monitor_flags(info->attrs[NL80211_ATTR_MNTR_FLAGS],
- &params.flags);
- if (err)
- return err;
- }
-
- if (params.flags & MONITOR_FLAG_ACTIVE &&
- !(rdev->wiphy.features & NL80211_FEATURE_ACTIVE_MONITOR))
- return -EOPNOTSUPP;
+ err = nl80211_parse_mon_options(rdev, type, info, &params);
+ if (err < 0)
+ return err;
msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
if (!msg)