[2/2,-,linux-stable-4.4] ath10k: rebuild crypto header in rx data frames

Message ID	1525069587-19281-3-git-send-email-srirrama@codeaurora.org (mailing list archive)
State	New, archived
Headers	show Return-Path: <ath10k-bounces+patchwork-ath10k=patchwork.kernel.org@lists.infradead.org> sender: srirrama@smtp.codeaurora.org) by smtp.codeaurora.org (Postfix) with ESMTPSA id B7A5A601A1; Mon, 30 Apr 2018 06:27:41 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 smtp.codeaurora.org B7A5A601A1 From: Sriram R <srirrama@codeaurora.org> To: stable@vger.kernel.org Subject: [PATCH 2/2 - linux-stable-4.4] ath10k: rebuild crypto header in rx data frames Date: Mon, 30 Apr 2018 11:56:27 +0530 Message-Id: <1525069587-19281-3-git-send-email-srirrama@codeaurora.org> In-Reply-To: <1525069587-19281-1-git-send-email-srirrama@codeaurora.org> References: <1525069587-19281-1-git-send-email-srirrama@codeaurora.org> Precedence: list Cc: Vasanthakumar Thiagarajan <vthiagar@codeaurora.org>, linux-wireless@vger.kernel.org, Sriram R <srirrama@codeaurora.org>, ath10k@lists.infradead.org MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "ath10k" <ath10k-bounces@lists.infradead.org> Errors-To: ath10k-bounces+patchwork-ath10k=patchwork.kernel.org@lists.infradead.org

diff --git a/drivers/net/wireless/ath/ath10k/htt_rx.c b/drivers/net/wireless/ath/ath10k/htt_rx.c index 8d20ecc..d26cb37 100644 --- a/drivers/net/wireless/ath/ath10k/htt_rx.c +++ b/drivers/net/wireless/ath/ath10k/htt_rx.c @@ -1076,7 +1076,21 @@ static void ath10k_htt_rx_h_undecap_raw(struct ath10k *ar, hdr = (void *)msdu->data; /* Tail */ - skb_trim(msdu, msdu->len - ath10k_htt_rx_crypto_tail_len(ar, enctype)); + if (status->flag & RX_FLAG_IV_STRIPPED) { + skb_trim(msdu, msdu->len - + ath10k_htt_rx_crypto_tail_len(ar, enctype)); + } else { + /* MIC */ + if ((status->flag & RX_FLAG_MIC_STRIPPED) && + enctype == HTT_RX_MPDU_ENCRYPT_AES_CCM_WPA2) + skb_trim(msdu, msdu->len - 8); + + /* ICV */ + if (status->flag & RX_FLAG_ICV_STRIPPED && + enctype != HTT_RX_MPDU_ENCRYPT_AES_CCM_WPA2) + skb_trim(msdu, msdu->len - + ath10k_htt_rx_crypto_tail_len(ar, enctype)); + } /* MMIC */ if (!ieee80211_has_morefrags(hdr->frame_control) && @@ -1095,12 +1109,14 @@ static void ath10k_htt_rx_h_undecap_raw(struct ath10k *ar, static void ath10k_htt_rx_h_undecap_nwifi(struct ath10k *ar, struct sk_buff *msdu, struct ieee80211_rx_status *status, - const u8 first_hdr[64]) + const u8 first_hdr[64], + enum htt_rx_mpdu_encrypt_type enctype) { struct ieee80211_hdr *hdr; size_t hdr_len; u8 da[ETH_ALEN]; u8 sa[ETH_ALEN]; + int bytes_aligned = ar->hw_params.decap_align_bytes; /* Delivered decapped frame: * [nwifi 802.11 header] <-- replaced with 802.11 hdr @@ -1123,6 +1139,14 @@ static void ath10k_htt_rx_h_undecap_nwifi(struct ath10k *ar, /* push original 802.11 header */ hdr = (struct ieee80211_hdr *)first_hdr; hdr_len = ieee80211_hdrlen(hdr->frame_control); + + if (!(status->flag & RX_FLAG_IV_STRIPPED)) { + memcpy(skb_push(msdu, + ath10k_htt_rx_crypto_param_len(ar, enctype)), + (void *)hdr + round_up(hdr_len, bytes_aligned), + ath10k_htt_rx_crypto_param_len(ar, enctype)); + } + memcpy(skb_push(msdu, hdr_len), hdr, hdr_len); /* original 802.11 header has a different DA and in @@ -1180,6 +1204,7 @@ static void ath10k_htt_rx_h_undecap_eth(struct ath10k *ar, void *rfc1042; u8 da[ETH_ALEN]; u8 sa[ETH_ALEN]; + int bytes_aligned = ar->hw_params.decap_align_bytes; /* Delivered decapped frame: * [eth header] <-- replaced with 802.11 hdr & rfc1042/llc @@ -1203,6 +1228,14 @@ static void ath10k_htt_rx_h_undecap_eth(struct ath10k *ar, /* push original 802.11 header */ hdr = (struct ieee80211_hdr *)first_hdr; hdr_len = ieee80211_hdrlen(hdr->frame_control); + + if (!(status->flag & RX_FLAG_IV_STRIPPED)) { + memcpy(skb_push(msdu, + ath10k_htt_rx_crypto_param_len(ar, enctype)), + (void *)hdr + round_up(hdr_len, bytes_aligned), + ath10k_htt_rx_crypto_param_len(ar, enctype)); + } + memcpy(skb_push(msdu, hdr_len), hdr, hdr_len); /* original 802.11 header has a different DA and in @@ -1216,10 +1249,12 @@ static void ath10k_htt_rx_h_undecap_eth(struct ath10k *ar, static void ath10k_htt_rx_h_undecap_snap(struct ath10k *ar, struct sk_buff *msdu, struct ieee80211_rx_status *status, - const u8 first_hdr[64]) + const u8 first_hdr[64], + enum htt_rx_mpdu_encrypt_type enctype) { struct ieee80211_hdr *hdr; size_t hdr_len; + int bytes_aligned = ar->hw_params.decap_align_bytes; /* Delivered decapped frame: * [amsdu header] <-- replaced with 802.11 hdr @@ -1231,6 +1266,14 @@ static void ath10k_htt_rx_h_undecap_snap(struct ath10k *ar, hdr = (struct ieee80211_hdr *)first_hdr; hdr_len = ieee80211_hdrlen(hdr->frame_control); + + if (!(status->flag & RX_FLAG_IV_STRIPPED)) { + memcpy(skb_push(msdu, + ath10k_htt_rx_crypto_param_len(ar, enctype)), + (void *)hdr + round_up(hdr_len, bytes_aligned), + ath10k_htt_rx_crypto_param_len(ar, enctype)); + } + memcpy(skb_push(msdu, hdr_len), hdr, hdr_len); } @@ -1265,13 +1308,15 @@ static void ath10k_htt_rx_h_undecap(struct ath10k *ar, is_decrypted); break; case RX_MSDU_DECAP_NATIVE_WIFI: - ath10k_htt_rx_h_undecap_nwifi(ar, msdu, status, first_hdr); + ath10k_htt_rx_h_undecap_nwifi(ar, msdu, status, first_hdr, + enctype); break; case RX_MSDU_DECAP_ETHERNET2_DIX: ath10k_htt_rx_h_undecap_eth(ar, msdu, status, first_hdr, enctype); break; case RX_MSDU_DECAP_8023_SNAP_LLC: - ath10k_htt_rx_h_undecap_snap(ar, msdu, status, first_hdr); + ath10k_htt_rx_h_undecap_snap(ar, msdu, status, first_hdr, + enctype); break; } } @@ -1314,7 +1359,8 @@ static void ath10k_htt_rx_h_csum_offload(struct sk_buff *msdu) static void ath10k_htt_rx_h_mpdu(struct ath10k *ar, struct sk_buff_head *amsdu, - struct ieee80211_rx_status *status) + struct ieee80211_rx_status *status, + bool fill_crypt_header) { struct sk_buff *first; struct sk_buff *last; @@ -1324,7 +1370,6 @@ static void ath10k_htt_rx_h_mpdu(struct ath10k *ar, enum htt_rx_mpdu_encrypt_type enctype; u8 first_hdr[64]; u8 *qos; - size_t hdr_len; bool has_fcs_err; bool has_crypto_err; bool has_tkip_err; @@ -1345,15 +1390,17 @@ static void ath10k_htt_rx_h_mpdu(struct ath10k *ar, * decapped header. It'll be used for undecapping of each MSDU. */ hdr = (void *)rxd->rx_hdr_status; - hdr_len = ieee80211_hdrlen(hdr->frame_control); - memcpy(first_hdr, hdr, hdr_len); + memcpy(first_hdr, hdr, RX_HTT_HDR_STATUS_LEN); /* Each A-MSDU subframe will use the original header as the base and be * reported as a separate MSDU so strip the A-MSDU bit from QoS Ctl. */ hdr = (void *)first_hdr; - qos = ieee80211_get_qos_ctl(hdr); - qos[0] &= ~IEEE80211_QOS_CTL_A_MSDU_PRESENT; + + if (ieee80211_is_data_qos(hdr->frame_control)) { + qos = ieee80211_get_qos_ctl(hdr); + qos[0] &= ~IEEE80211_QOS_CTL_A_MSDU_PRESENT; + } /* Some attention flags are valid only in the last MSDU. */ last = skb_peek_tail(amsdu); @@ -1387,11 +1434,17 @@ static void ath10k_htt_rx_h_mpdu(struct ath10k *ar, if (has_tkip_err) status->flag |= RX_FLAG_MMIC_ERROR; - if (is_decrypted) + if (is_decrypted) { status->flag |= RX_FLAG_DECRYPTED | - RX_FLAG_IV_STRIPPED | RX_FLAG_MMIC_STRIPPED; + if (fill_crypt_header) + status->flag |= RX_FLAG_MIC_STRIPPED | + RX_FLAG_ICV_STRIPPED; + else + status->flag |= RX_FLAG_IV_STRIPPED; + } + skb_queue_walk(amsdu, msdu) { ath10k_htt_rx_h_csum_offload(msdu); ath10k_htt_rx_h_undecap(ar, msdu, status, first_hdr, enctype, @@ -1404,6 +1457,9 @@ static void ath10k_htt_rx_h_mpdu(struct ath10k *ar, if (!is_decrypted) continue; + if (fill_crypt_header) + continue; + hdr = (void *)msdu->data; hdr->frame_control &= ~__cpu_to_le16(IEEE80211_FCTL_PROTECTED); } @@ -1414,6 +1470,9 @@ static void ath10k_htt_rx_h_deliver(struct ath10k *ar, struct ieee80211_rx_status *status) { struct sk_buff *msdu; + struct sk_buff *first_subframe; + + first_subframe = skb_peek(amsdu); while ((msdu = __skb_dequeue(amsdu))) { /* Setup per-MSDU flags */ @@ -1422,6 +1481,13 @@ static void ath10k_htt_rx_h_deliver(struct ath10k *ar, else status->flag |= RX_FLAG_AMSDU_MORE; + if (msdu == first_subframe) { + first_subframe = NULL; + status->flag &= ~RX_FLAG_ALLOW_SAME_PN; + } else { + status->flag |= RX_FLAG_ALLOW_SAME_PN; + } + ath10k_process_rx(ar, status, msdu); } } @@ -1607,7 +1673,7 @@ static void ath10k_htt_rx_handler(struct ath10k_htt *htt, ath10k_htt_rx_h_ppdu(ar, &amsdu, rx_status, 0xffff); ath10k_htt_rx_h_unchain(ar, &amsdu, ret > 0); ath10k_htt_rx_h_filter(ar, &amsdu, rx_status); - ath10k_htt_rx_h_mpdu(ar, &amsdu, rx_status); + ath10k_htt_rx_h_mpdu(ar, &amsdu, rx_status, true); ath10k_htt_rx_h_deliver(ar, &amsdu, rx_status); } @@ -1653,7 +1719,7 @@ static void ath10k_htt_rx_frag_handler(struct ath10k_htt *htt, ath10k_htt_rx_h_ppdu(ar, &amsdu, rx_status, 0xffff); ath10k_htt_rx_h_filter(ar, &amsdu, rx_status); - ath10k_htt_rx_h_mpdu(ar, &amsdu, rx_status); + ath10k_htt_rx_h_mpdu(ar, &amsdu, rx_status, true); ath10k_htt_rx_h_deliver(ar, &amsdu, rx_status); if (fw_desc_len > 0) { @@ -1952,7 +2018,7 @@ static void ath10k_htt_rx_in_ord_ind(struct ath10k *ar, struct sk_buff *skb) */ ath10k_htt_rx_h_ppdu(ar, &amsdu, status, vdev_id); ath10k_htt_rx_h_filter(ar, &amsdu, status); - ath10k_htt_rx_h_mpdu(ar, &amsdu, status); + ath10k_htt_rx_h_mpdu(ar, &amsdu, status, false); ath10k_htt_rx_h_deliver(ar, &amsdu, status); break; case -EAGAIN:

[2/2,-,linux-stable-4.4] ath10k: rebuild crypto header in rx data frames

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