mac80211: support A-MPDU status reporting
Support getting A-MPDU status information from the
drivers and reporting it to userspace via radiotap
in the standard fields.
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
diff --git a/net/mac80211/rx.c b/net/mac80211/rx.c
index 0cb4ede..78bf6c7 100644
--- a/net/mac80211/rx.c
+++ b/net/mac80211/rx.c
@@ -60,7 +60,9 @@
struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(skb);
struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
- if (status->flag & (RX_FLAG_FAILED_FCS_CRC | RX_FLAG_FAILED_PLCP_CRC))
+ if (status->flag & (RX_FLAG_FAILED_FCS_CRC |
+ RX_FLAG_FAILED_PLCP_CRC |
+ RX_FLAG_AMPDU_IS_ZEROLEN))
return 1;
if (unlikely(skb->len < 16 + present_fcs_len))
return 1;
@@ -91,6 +93,13 @@
if (status->flag & RX_FLAG_HT) /* HT info */
len += 3;
+ if (status->flag & RX_FLAG_AMPDU_DETAILS) {
+ /* padding */
+ while (len & 3)
+ len++;
+ len += 8;
+ }
+
return len;
}
@@ -215,6 +224,37 @@
pos++;
*pos++ = status->rate_idx;
}
+
+ if (status->flag & RX_FLAG_AMPDU_DETAILS) {
+ u16 flags = 0;
+
+ /* ensure 4 byte alignment */
+ while ((pos - (u8 *)rthdr) & 3)
+ pos++;
+ rthdr->it_present |=
+ cpu_to_le32(1 << IEEE80211_RADIOTAP_AMPDU_STATUS);
+ put_unaligned_le32(status->ampdu_reference, pos);
+ pos += 4;
+ if (status->flag & RX_FLAG_AMPDU_REPORT_ZEROLEN)
+ flags |= IEEE80211_RADIOTAP_AMPDU_REPORT_ZEROLEN;
+ if (status->flag & RX_FLAG_AMPDU_IS_ZEROLEN)
+ flags |= IEEE80211_RADIOTAP_AMPDU_IS_ZEROLEN;
+ if (status->flag & RX_FLAG_AMPDU_LAST_KNOWN)
+ flags |= IEEE80211_RADIOTAP_AMPDU_LAST_KNOWN;
+ if (status->flag & RX_FLAG_AMPDU_IS_LAST)
+ flags |= IEEE80211_RADIOTAP_AMPDU_IS_LAST;
+ if (status->flag & RX_FLAG_AMPDU_DELIM_CRC_ERROR)
+ flags |= IEEE80211_RADIOTAP_AMPDU_DELIM_CRC_ERR;
+ if (status->flag & RX_FLAG_AMPDU_DELIM_CRC_KNOWN)
+ flags |= IEEE80211_RADIOTAP_AMPDU_DELIM_CRC_KNOWN;
+ put_unaligned_le16(flags, pos);
+ pos += 2;
+ if (status->flag & RX_FLAG_AMPDU_DELIM_CRC_KNOWN)
+ *pos++ = status->ampdu_delimiter_crc;
+ else
+ *pos++ = 0;
+ *pos++ = 0;
+ }
}
/*