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authorLuciano Coelho <luciano.coelho@intel.com>2014-11-10 16:13:46 +0200
committerJohannes Berg <johannes.berg@intel.com>2014-11-19 18:45:42 +0100
commit256da02d1806c740be97576a5e8548d658858319 (patch)
tree18eb9845e6f71eeec8b3c6b4e917f66971c3e9f5 /net/wireless
parentb6da911b3cf1d342f2f7123c9eb6463d299bca4e (diff)
downloadlinux-256da02d1806c740be97576a5e8548d658858319.tar.bz2
cfg80211: refactor nl80211_start_sched_scan so it can be reused
For net detect, we will need to reuse most of the scheduled scan parsing function, but not all, so split out the attributes parsing part out of the main start sched_scan function. Signed-off-by: Luciano Coelho <luciano.coelho@intel.com> Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Diffstat (limited to 'net/wireless')
-rw-r--r--net/wireless/nl80211.c130
1 files changed, 72 insertions, 58 deletions
diff --git a/net/wireless/nl80211.c b/net/wireless/nl80211.c
index 27666f5e5050..03a302b884fd 100644
--- a/net/wireless/nl80211.c
+++ b/net/wireless/nl80211.c
@@ -5681,14 +5681,12 @@ static int nl80211_trigger_scan(struct sk_buff *skb, struct genl_info *info)
return err;
}
-static int nl80211_start_sched_scan(struct sk_buff *skb,
- struct genl_info *info)
+static struct cfg80211_sched_scan_request *
+nl80211_parse_sched_scan(struct wiphy *wiphy,
+ struct nlattr **attrs)
{
struct cfg80211_sched_scan_request *request;
- struct cfg80211_registered_device *rdev = info->user_ptr[0];
- struct net_device *dev = info->user_ptr[1];
struct nlattr *attr;
- struct wiphy *wiphy;
int err, tmp, n_ssids = 0, n_match_sets = 0, n_channels, i;
u32 interval;
enum ieee80211_band band;
@@ -5696,38 +5694,32 @@ static int nl80211_start_sched_scan(struct sk_buff *skb,
struct nlattr *tb[NL80211_SCHED_SCAN_MATCH_ATTR_MAX + 1];
s32 default_match_rssi = NL80211_SCAN_RSSI_THOLD_OFF;
- if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_SCHED_SCAN) ||
- !rdev->ops->sched_scan_start)
- return -EOPNOTSUPP;
-
- if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
- return -EINVAL;
+ if (!is_valid_ie_attr(attrs[NL80211_ATTR_IE]))
+ return ERR_PTR(-EINVAL);
- if (!info->attrs[NL80211_ATTR_SCHED_SCAN_INTERVAL])
- return -EINVAL;
+ if (!attrs[NL80211_ATTR_SCHED_SCAN_INTERVAL])
+ return ERR_PTR(-EINVAL);
- interval = nla_get_u32(info->attrs[NL80211_ATTR_SCHED_SCAN_INTERVAL]);
+ interval = nla_get_u32(attrs[NL80211_ATTR_SCHED_SCAN_INTERVAL]);
if (interval == 0)
- return -EINVAL;
-
- wiphy = &rdev->wiphy;
+ return ERR_PTR(-EINVAL);
- if (info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
+ if (attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
n_channels = validate_scan_freqs(
- info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]);
+ attrs[NL80211_ATTR_SCAN_FREQUENCIES]);
if (!n_channels)
- return -EINVAL;
+ return ERR_PTR(-EINVAL);
} else {
n_channels = ieee80211_get_num_supported_channels(wiphy);
}
- if (info->attrs[NL80211_ATTR_SCAN_SSIDS])
- nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_SSIDS],
+ if (attrs[NL80211_ATTR_SCAN_SSIDS])
+ nla_for_each_nested(attr, attrs[NL80211_ATTR_SCAN_SSIDS],
tmp)
n_ssids++;
if (n_ssids > wiphy->max_sched_scan_ssids)
- return -EINVAL;
+ return ERR_PTR(-EINVAL);
/*
* First, count the number of 'real' matchsets. Due to an issue with
@@ -5738,9 +5730,9 @@ static int nl80211_start_sched_scan(struct sk_buff *skb,
* older userspace that treated a matchset with only the RSSI as the
* global RSSI for all other matchsets - if there are other matchsets.
*/
- if (info->attrs[NL80211_ATTR_SCHED_SCAN_MATCH]) {
+ if (attrs[NL80211_ATTR_SCHED_SCAN_MATCH]) {
nla_for_each_nested(attr,
- info->attrs[NL80211_ATTR_SCHED_SCAN_MATCH],
+ attrs[NL80211_ATTR_SCHED_SCAN_MATCH],
tmp) {
struct nlattr *rssi;
@@ -5748,7 +5740,7 @@ static int nl80211_start_sched_scan(struct sk_buff *skb,
nla_data(attr), nla_len(attr),
nl80211_match_policy);
if (err)
- return err;
+ return ERR_PTR(err);
/* add other standalone attributes here */
if (tb[NL80211_SCHED_SCAN_MATCH_ATTR_SSID]) {
n_match_sets++;
@@ -5765,30 +5757,23 @@ static int nl80211_start_sched_scan(struct sk_buff *skb,
n_match_sets = 1;
if (n_match_sets > wiphy->max_match_sets)
- return -EINVAL;
+ return ERR_PTR(-EINVAL);
- if (info->attrs[NL80211_ATTR_IE])
- ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
+ if (attrs[NL80211_ATTR_IE])
+ ie_len = nla_len(attrs[NL80211_ATTR_IE]);
else
ie_len = 0;
if (ie_len > wiphy->max_sched_scan_ie_len)
- return -EINVAL;
-
- if (rdev->sched_scan_req) {
- err = -EINPROGRESS;
- goto out;
- }
+ return ERR_PTR(-EINVAL);
request = kzalloc(sizeof(*request)
+ sizeof(*request->ssids) * n_ssids
+ sizeof(*request->match_sets) * n_match_sets
+ sizeof(*request->channels) * n_channels
+ ie_len, GFP_KERNEL);
- if (!request) {
- err = -ENOMEM;
- goto out;
- }
+ if (!request)
+ return ERR_PTR(-ENOMEM);
if (n_ssids)
request->ssids = (void *)&request->channels[n_channels];
@@ -5813,10 +5798,10 @@ static int nl80211_start_sched_scan(struct sk_buff *skb,
request->n_match_sets = n_match_sets;
i = 0;
- if (info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
+ if (attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
/* user specified, bail out if channel not found */
nla_for_each_nested(attr,
- info->attrs[NL80211_ATTR_SCAN_FREQUENCIES],
+ attrs[NL80211_ATTR_SCAN_FREQUENCIES],
tmp) {
struct ieee80211_channel *chan;
@@ -5862,8 +5847,8 @@ static int nl80211_start_sched_scan(struct sk_buff *skb,
request->n_channels = i;
i = 0;
- if (info->attrs[NL80211_ATTR_SCAN_SSIDS]) {
- nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_SSIDS],
+ if (attrs[NL80211_ATTR_SCAN_SSIDS]) {
+ nla_for_each_nested(attr, attrs[NL80211_ATTR_SCAN_SSIDS],
tmp) {
if (nla_len(attr) > IEEE80211_MAX_SSID_LEN) {
err = -EINVAL;
@@ -5877,9 +5862,9 @@ static int nl80211_start_sched_scan(struct sk_buff *skb,
}
i = 0;
- if (info->attrs[NL80211_ATTR_SCHED_SCAN_MATCH]) {
+ if (attrs[NL80211_ATTR_SCHED_SCAN_MATCH]) {
nla_for_each_nested(attr,
- info->attrs[NL80211_ATTR_SCHED_SCAN_MATCH],
+ attrs[NL80211_ATTR_SCHED_SCAN_MATCH],
tmp) {
struct nlattr *ssid, *rssi;
@@ -5934,13 +5919,13 @@ static int nl80211_start_sched_scan(struct sk_buff *skb,
if (ie_len) {
request->ie_len = ie_len;
memcpy((void *)request->ie,
- nla_data(info->attrs[NL80211_ATTR_IE]),
+ nla_data(attrs[NL80211_ATTR_IE]),
request->ie_len);
}
- if (info->attrs[NL80211_ATTR_SCAN_FLAGS]) {
+ if (attrs[NL80211_ATTR_SCAN_FLAGS]) {
request->flags = nla_get_u32(
- info->attrs[NL80211_ATTR_SCAN_FLAGS]);
+ attrs[NL80211_ATTR_SCAN_FLAGS]);
if ((request->flags & NL80211_SCAN_FLAG_LOW_PRIORITY) &&
!(wiphy->features & NL80211_FEATURE_LOW_PRIORITY_SCAN)) {
err = -EOPNOTSUPP;
@@ -5948,22 +5933,51 @@ static int nl80211_start_sched_scan(struct sk_buff *skb,
}
}
- request->dev = dev;
- request->wiphy = &rdev->wiphy;
request->interval = interval;
request->scan_start = jiffies;
- err = rdev_sched_scan_start(rdev, dev, request);
- if (!err) {
- rdev->sched_scan_req = request;
- nl80211_send_sched_scan(rdev, dev,
- NL80211_CMD_START_SCHED_SCAN);
- goto out;
- }
+ return request;
out_free:
kfree(request);
-out:
+ return ERR_PTR(err);
+}
+
+static int nl80211_start_sched_scan(struct sk_buff *skb,
+ struct genl_info *info)
+{
+ struct cfg80211_registered_device *rdev = info->user_ptr[0];
+ struct net_device *dev = info->user_ptr[1];
+ int err;
+
+ if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_SCHED_SCAN) ||
+ !rdev->ops->sched_scan_start)
+ return -EOPNOTSUPP;
+
+ if (rdev->sched_scan_req)
+ return -EINPROGRESS;
+
+ rdev->sched_scan_req = nl80211_parse_sched_scan(&rdev->wiphy,
+ info->attrs);
+ err = PTR_ERR_OR_ZERO(rdev->sched_scan_req);
+ if (err)
+ goto out_err;
+
+ err = rdev_sched_scan_start(rdev, dev, rdev->sched_scan_req);
+ if (err)
+ goto out_free;
+
+ rdev->sched_scan_req->dev = dev;
+ rdev->sched_scan_req->wiphy = &rdev->wiphy;
+
+ nl80211_send_sched_scan(rdev, dev,
+ NL80211_CMD_START_SCHED_SCAN);
+ return 0;
+
+out_free:
+ kfree(rdev->sched_scan_req);
+out_err:
+ rdev->sched_scan_req = NULL;
return err;
}