cfg80211: remove unused function ieee80211_data_from_8023() (a6bcda44) · Commits · 戴 / test

Documentation/driver-api/80211/cfg80211.rst

+0 −3

Original line number	Diff line number	Diff line
		@@ -299,9 +299,6 @@ Data path helpers
		.. kernel-doc:: include/net/cfg80211.h
		:functions: ieee80211_data_to_8023

		.. kernel-doc:: include/net/cfg80211.h
		:functions: ieee80211_data_from_8023

		.. kernel-doc:: include/net/cfg80211.h
		:functions: ieee80211_amsdu_to_8023s

include/net/cfg80211.h

+0 −13

Original line number	Diff line number	Diff line
		@@ -4346,19 +4346,6 @@ static inline int ieee80211_data_to_8023(struct sk_buff skb, const u8 addr,
		return ieee80211_data_to_8023_exthdr(skb, NULL, addr, iftype);
		}

		/**
		* ieee80211_data_from_8023 - convert an 802.3 frame to 802.11
		* @skb: the 802.3 frame
		* @addr: the device MAC address
		* @iftype: the virtual interface type
		* @bssid: the network bssid (used only for iftype STATION and ADHOC)
		* @qos: build 802.11 QoS data frame
		* Return: 0 on success, or a negative error code.
		*/
		int ieee80211_data_from_8023(struct sk_buff skb, const u8 addr,
		enum nl80211_iftype iftype, const u8 *bssid,
		bool qos);

		/**
		* ieee80211_amsdu_to_8023s - decode an IEEE 802.11n A-MSDU frame
		*

net/wireless/util.c

+0 −115

Original line number	Diff line number	Diff line
		@@ -529,121 +529,6 @@ int ieee80211_data_to_8023_exthdr(struct sk_buff skb, struct ethhdr ehdr,
		}
		EXPORT_SYMBOL(ieee80211_data_to_8023_exthdr);

		int ieee80211_data_from_8023(struct sk_buff skb, const u8 addr,
		enum nl80211_iftype iftype,
		const u8 *bssid, bool qos)
		{
		struct ieee80211_hdr hdr;
		u16 hdrlen, ethertype;
		__le16 fc;
		const u8 *encaps_data;
		int encaps_len, skip_header_bytes;
		int nh_pos, h_pos;
		int head_need;

		if (unlikely(skb->len < ETH_HLEN))
		return -EINVAL;

		nh_pos = skb_network_header(skb) - skb->data;
		h_pos = skb_transport_header(skb) - skb->data;

		/* convert Ethernet header to proper 802.11 header (based on
		* operation mode) */
		ethertype = (skb->data[12] << 8) \| skb->data[13];
		fc = cpu_to_le16(IEEE80211_FTYPE_DATA \| IEEE80211_STYPE_DATA);

		switch (iftype) {
		case NL80211_IFTYPE_AP:
		case NL80211_IFTYPE_AP_VLAN:
		case NL80211_IFTYPE_P2P_GO:
		fc \|= cpu_to_le16(IEEE80211_FCTL_FROMDS);
		/* DA BSSID SA */
		memcpy(hdr.addr1, skb->data, ETH_ALEN);
		memcpy(hdr.addr2, addr, ETH_ALEN);
		memcpy(hdr.addr3, skb->data + ETH_ALEN, ETH_ALEN);
		hdrlen = 24;
		break;
		case NL80211_IFTYPE_STATION:
		case NL80211_IFTYPE_P2P_CLIENT:
		fc \|= cpu_to_le16(IEEE80211_FCTL_TODS);
		/* BSSID SA DA */
		memcpy(hdr.addr1, bssid, ETH_ALEN);
		memcpy(hdr.addr2, skb->data + ETH_ALEN, ETH_ALEN);
		memcpy(hdr.addr3, skb->data, ETH_ALEN);
		hdrlen = 24;
		break;
		case NL80211_IFTYPE_OCB:
		case NL80211_IFTYPE_ADHOC:
		/* DA SA BSSID */
		memcpy(hdr.addr1, skb->data, ETH_ALEN);
		memcpy(hdr.addr2, skb->data + ETH_ALEN, ETH_ALEN);
		memcpy(hdr.addr3, bssid, ETH_ALEN);
		hdrlen = 24;
		break;
		default:
		return -EOPNOTSUPP;
		}

		if (qos) {
		fc \|= cpu_to_le16(IEEE80211_STYPE_QOS_DATA);
		hdrlen += 2;
		}

		hdr.frame_control = fc;
		hdr.duration_id = 0;
		hdr.seq_ctrl = 0;

		skip_header_bytes = ETH_HLEN;
		if (ethertype == ETH_P_AARP \|\| ethertype == ETH_P_IPX) {
		encaps_data = bridge_tunnel_header;
		encaps_len = sizeof(bridge_tunnel_header);
		skip_header_bytes -= 2;
		} else if (ethertype >= ETH_P_802_3_MIN) {
		encaps_data = rfc1042_header;
		encaps_len = sizeof(rfc1042_header);
		skip_header_bytes -= 2;
		} else {
		encaps_data = NULL;
		encaps_len = 0;
		}

		skb_pull(skb, skip_header_bytes);
		nh_pos -= skip_header_bytes;
		h_pos -= skip_header_bytes;

		head_need = hdrlen + encaps_len - skb_headroom(skb);

		if (head_need > 0 \|\| skb_cloned(skb)) {
		head_need = max(head_need, 0);
		if (head_need)
		skb_orphan(skb);

		if (pskb_expand_head(skb, head_need, 0, GFP_ATOMIC))
		return -ENOMEM;
		}

		if (encaps_data) {
		memcpy(skb_push(skb, encaps_len), encaps_data, encaps_len);
		nh_pos += encaps_len;
		h_pos += encaps_len;
		}

		memcpy(skb_push(skb, hdrlen), &hdr, hdrlen);

		nh_pos += hdrlen;
		h_pos += hdrlen;

		/* Update skb pointers to various headers since this modified frame
		* is going to go through Linux networking code that may potentially
		* need things like pointer to IP header. */
		skb_reset_mac_header(skb);
		skb_set_network_header(skb, nh_pos);
		skb_set_transport_header(skb, h_pos);

		return 0;
		}
		EXPORT_SYMBOL(ieee80211_data_from_8023);

		static void
		__frame_add_frag(struct sk_buff skb, struct page page,
		void *ptr, int len, int size)

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