For location and connectivity services, userspace would often like to know the time when the BSS was last seen. The current "last seen" value is calculated in a way that makes it less useful, especially if the system suspended in the meantime. Add the ability for the driver to report a real CLOCK_BOOTTIME stamp that can then be reported to userspace (if present). Drivers wishing to use this must be converted to the new API to call cfg80211_inform_bss_data() or cfg80211_inform_bss_frame_data(). They need to ensure the reported value is accurate enough even when the frame might have been buffered in the device (e.g. firmware.)
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| @@ -3364,6 +3364,9 @@ enum nl80211_bss_scan_width { · 3363 unmodified lines | ||
| 3364 | 3364 | * (not present if no beacon frame has been received yet) |
| 3365 | 3365 | * @NL80211_BSS_PRESP_DATA: the data in @NL80211_BSS_INFORMATION_ELEMENTS and |
| 3366 | 3366 | * @NL80211_BSS_TSF is known to be from a probe response (flag attribute) |
| 3367 | + * @NL80211_BSS_LAST_SEEN_BOOTTIME: CLOCK_BOOTTIME timestamp when this entry | |
| 3368 | + * was last updated by a received frame. The value is expected to be | |
| 3369 | + * accurate to about 10ms. (u64, nanoseconds) | |
| 3367 | 3370 | * @__NL80211_BSS_AFTER_LAST: internal |
| 3368 | 3371 | * @NL80211_BSS_MAX: highest BSS attribute |
| 3369 | 3372 | */ |
| @@ -3383,6 +3386,7 @@ enum nl80211_bss { · 13 unmodified lines | ||
| 3383 | 3386 | NL80211_BSS_CHAN_WIDTH, |
| 3384 | 3387 | NL80211_BSS_BEACON_TSF, |
| 3385 | 3388 | NL80211_BSS_PRESP_DATA, |
| 3389 | + NL80211_BSS_LAST_SEEN_BOOTTIME, | |
| 3386 | 3390 | |
| 3387 | 3391 | /* keep last */ |
| 3388 | 3392 | __NL80211_BSS_AFTER_LAST, |