User-space needs to know real time from boot (including suspend)
of bss entry for location and connectivity services.
Change-Id: I7d5db4378d7941ccecf8ac675425024c2aafe62b
Signed-off-by: Dmitry Shmidt <dimitrysh@xxxxxxxxxx>
---
include/uapi/linux/nl80211.h | 2 ++
net/wireless/core.h | 1 +
net/wireless/nl80211.c | 3 ++-
net/wireless/scan.c | 3 +++
4 files changed, 8 insertions(+), 1 deletion(-)
diff --git a/include/uapi/linux/nl80211.h b/include/uapi/linux/nl80211.h
index c0ab6b0..173b6a5 100644
--- a/include/uapi/linux/nl80211.h
+++ b/include/uapi/linux/nl80211.h
@@ -3364,6 +3364,7 @@ enum nl80211_bss_scan_width {
* (not present if no beacon frame has been received yet)
* @NL80211_BSS_PRESP_DATA: the data in @NL80211_BSS_INFORMATION_ELEMENTS and
* @NL80211_BSS_TSF is known to be from a probe response (flag attribute)
+ * @NL80211_BSS_LAST_SEEN_BOOTTIME: age of this BSS entry in us from boot
* @__NL80211_BSS_AFTER_LAST: internal
* @NL80211_BSS_MAX: highest BSS attribute
*/
@@ -3383,6 +3384,7 @@ enum nl80211_bss {
NL80211_BSS_CHAN_WIDTH,
NL80211_BSS_BEACON_TSF,
NL80211_BSS_PRESP_DATA,
+ NL80211_BSS_LAST_SEEN_BOOTTIME,
/* keep last */
__NL80211_BSS_AFTER_LAST,
diff --git a/net/wireless/core.h b/net/wireless/core.h
index b9d5bc8..261e159 100644
--- a/net/wireless/core.h
+++ b/net/wireless/core.h
@@ -140,6 +140,7 @@ struct cfg80211_internal_bss {
unsigned long ts;
unsigned long refcount;
atomic_t hold;
+ u64 tfb;
/* must be last because of priv member */
struct cfg80211_bss pub;
diff --git a/net/wireless/nl80211.c b/net/wireless/nl80211.c
index f05ba8b..a9ed2da 100644
--- a/net/wireless/nl80211.c
+++ b/net/wireless/nl80211.c
@@ -6602,7 +6602,8 @@ static int nl80211_send_bss(struct sk_buff *msg,
struct netlink_callback *cb,
nla_put_u32(msg, NL80211_BSS_FREQUENCY, res->channel->center_freq) ||
nla_put_u32(msg, NL80211_BSS_CHAN_WIDTH, res->scan_width) ||
nla_put_u32(msg, NL80211_BSS_SEEN_MS_AGO,
- jiffies_to_msecs(jiffies - intbss->ts)))
+ jiffies_to_msecs(jiffies - intbss->ts)) ||
+ nla_put_u64(msg, NL80211_BSS_LAST_SEEN_BOOTTIME, intbss->tfb))
goto nla_put_failure;
switch (rdev->wiphy.signal_type) {
diff --git a/net/wireless/scan.c b/net/wireless/scan.c
index 3a50aa2..275cc92 100644
--- a/net/wireless/scan.c
+++ b/net/wireless/scan.c
@@ -749,10 +749,12 @@ cfg80211_bss_update(struct
cfg80211_registered_device *rdev,
bool signal_valid)
{
struct cfg80211_internal_bss *found = NULL;
+ struct timespec tfb;
if (WARN_ON(!tmp->pub.channel))
return NULL;
+ get_monotonic_boottime(&tfb);
tmp->ts = jiffies;
spin_lock_bh(&rdev->bss_lock);
@@ -895,6 +897,7 @@ cfg80211_bss_update(struct cfg80211_registered_device *rdev,
found = new;
}
+ found->tfb = (u64)(timespec_to_ns(&tfb) / 1000);
rdev->bss_generation++;
bss_ref_get(rdev, found);
spin_unlock_bh(&rdev->bss_lock);
--
2.6.0.rc2.230.g3dd15c0
Attachment:
0001-nl80211-report-age-of-bss-entry-from-boot-in-microse.patch
Description: Binary data
