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cfg80211: allow survey data to return global data

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Not all devices are able to report survey data (particularly
time spent for various operations) per channel. As all these
statistics already exist in survey data, allow such devices
to report them (if userspace requested it)

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
This commit is contained in:
Johannes Berg
2014-11-14 16:43:50 +01:00
parent 4ed20bebf5
commit 11f78ac32b
3 changed files with 33 additions and 17 deletions
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31
net/wireless/nl80211.c
View File

@@ -6613,12 +6613,17 @@ static int nl80211_dump_scan(struct sk_buff *skb, struct netlink_callback *cb)
}
static int nl80211_send_survey(struct sk_buff *msg, u32 portid, u32 seq,
int flags, struct net_device *dev,
struct survey_info *survey)
int flags, struct net_device *dev,
bool allow_radio_stats,
struct survey_info *survey)
{
void *hdr;
struct nlattr *infoattr;
/* skip radio stats if userspace didn't request them */
if (!survey->channel && !allow_radio_stats)
return 0;
hdr = nl80211hdr_put(msg, portid, seq, flags,
NL80211_CMD_NEW_SURVEY_RESULTS);
if (!hdr)
@@ -6631,7 +6636,8 @@ static int nl80211_send_survey(struct sk_buff *msg, u32 portid, u32 seq,
if (!infoattr)
goto nla_put_failure;
if (nla_put_u32(msg, NL80211_SURVEY_INFO_FREQUENCY,
if (survey->channel &&
nla_put_u32(msg, NL80211_SURVEY_INFO_FREQUENCY,
survey->channel->center_freq))
goto nla_put_failure;
@@ -6671,19 +6677,22 @@ static int nl80211_send_survey(struct sk_buff *msg, u32 portid, u32 seq,
return -EMSGSIZE;
}
static int nl80211_dump_survey(struct sk_buff *skb,
struct netlink_callback *cb)
static int nl80211_dump_survey(struct sk_buff *skb, struct netlink_callback *cb)
{
struct survey_info survey;
struct cfg80211_registered_device *rdev;
struct wireless_dev *wdev;
int survey_idx = cb->args[2];
int res;
bool radio_stats;
res = nl80211_prepare_wdev_dump(skb, cb, &rdev, &wdev);
if (res)
return res;
/* prepare_wdev_dump parsed the attributes */
radio_stats = nl80211_fam.attrbuf[NL80211_ATTR_SURVEY_RADIO_STATS];
if (!wdev->netdev) {
res = -EINVAL;
goto out_err;
@@ -6701,13 +6710,9 @@ static int nl80211_dump_survey(struct sk_buff *skb,
if (res)
goto out_err;
/* Survey without a channel doesn't make sense */
if (!survey.channel) {
res = -EINVAL;
goto out;
}
if (survey.channel->flags & IEEE80211_CHAN_DISABLED) {
/* don't send disabled channels, but do send non-channel data */
if (survey.channel &&
survey.channel->flags & IEEE80211_CHAN_DISABLED) {
survey_idx++;
continue;
}
@@ -6715,7 +6720,7 @@ static int nl80211_dump_survey(struct sk_buff *skb,
if (nl80211_send_survey(skb,
NETLINK_CB(cb->skb).portid,
cb->nlh->nlmsg_seq, NLM_F_MULTI,
wdev->netdev, &survey) < 0)
wdev->netdev, radio_stats, &survey) < 0)
goto out;
survey_idx++;
}