diff options
Diffstat (limited to 'package/kernel/mac80211/patches/320-cfg80211-add-support-for-non-linear-skbs-in-ieee8021.patch')
| -rw-r--r-- | package/kernel/mac80211/patches/320-cfg80211-add-support-for-non-linear-skbs-in-ieee8021.patch | 159 |
1 files changed, 0 insertions, 159 deletions
diff --git a/package/kernel/mac80211/patches/320-cfg80211-add-support-for-non-linear-skbs-in-ieee8021.patch b/package/kernel/mac80211/patches/320-cfg80211-add-support-for-non-linear-skbs-in-ieee8021.patch deleted file mode 100644 index 8081f4b643..0000000000 --- a/package/kernel/mac80211/patches/320-cfg80211-add-support-for-non-linear-skbs-in-ieee8021.patch +++ /dev/null @@ -1,159 +0,0 @@ -From: Felix Fietkau <nbd@nbd.name> -Date: Tue, 2 Feb 2016 14:39:10 +0100 -Subject: [PATCH] cfg80211: add support for non-linear skbs in - ieee80211_amsdu_to_8023s - -Signed-off-by: Felix Fietkau <nbd@nbd.name> -Signed-off-by: Johannes Berg <johannes.berg@intel.com> ---- - ---- a/net/wireless/util.c -+++ b/net/wireless/util.c -@@ -644,73 +644,75 @@ int ieee80211_data_from_8023(struct sk_b - } - EXPORT_SYMBOL(ieee80211_data_from_8023); - -+static struct sk_buff * -+__ieee80211_amsdu_copy(struct sk_buff *skb, unsigned int hlen, -+ int offset, int len) -+{ -+ struct sk_buff *frame; -+ -+ if (skb->len - offset < len) -+ return NULL; -+ -+ /* -+ * Allocate and reserve two bytes more for payload -+ * alignment since sizeof(struct ethhdr) is 14. -+ */ -+ frame = dev_alloc_skb(hlen + sizeof(struct ethhdr) + 2 + len); -+ -+ skb_reserve(frame, hlen + sizeof(struct ethhdr) + 2); -+ skb_copy_bits(skb, offset, skb_put(frame, len), len); -+ -+ return frame; -+} - - void ieee80211_amsdu_to_8023s(struct sk_buff *skb, struct sk_buff_head *list, - const u8 *addr, enum nl80211_iftype iftype, - const unsigned int extra_headroom, - bool has_80211_header) - { -+ unsigned int hlen = ALIGN(extra_headroom, 4); - struct sk_buff *frame = NULL; - u16 ethertype; - u8 *payload; -- const struct ethhdr *eth; -- int remaining, err; -- u8 dst[ETH_ALEN], src[ETH_ALEN]; -- -- if (skb_linearize(skb)) -- goto out; -+ int offset = 0, remaining, err; -+ struct ethhdr eth; -+ bool reuse_skb = true; -+ bool last = false; - - if (has_80211_header) { -- err = ieee80211_data_to_8023(skb, addr, iftype); -+ err = __ieee80211_data_to_8023(skb, ð, addr, iftype); - if (err) - goto out; -- -- /* skip the wrapping header */ -- eth = (struct ethhdr *) skb_pull(skb, sizeof(struct ethhdr)); -- if (!eth) -- goto out; -- } else { -- eth = (struct ethhdr *) skb->data; - } - -- while (skb != frame) { -+ while (!last) { -+ unsigned int subframe_len; -+ int len; - u8 padding; -- __be16 len = eth->h_proto; -- unsigned int subframe_len = sizeof(struct ethhdr) + ntohs(len); -- -- remaining = skb->len; -- memcpy(dst, eth->h_dest, ETH_ALEN); -- memcpy(src, eth->h_source, ETH_ALEN); - -+ skb_copy_bits(skb, offset, ð, sizeof(eth)); -+ len = ntohs(eth.h_proto); -+ subframe_len = sizeof(struct ethhdr) + len; - padding = (4 - subframe_len) & 0x3; -+ - /* the last MSDU has no padding */ -+ remaining = skb->len - offset; - if (subframe_len > remaining) - goto purge; - -- skb_pull(skb, sizeof(struct ethhdr)); -+ offset += sizeof(struct ethhdr); - /* reuse skb for the last subframe */ -- if (remaining <= subframe_len + padding) -+ last = remaining <= subframe_len + padding; -+ if (!skb_is_nonlinear(skb) && last) { -+ skb_pull(skb, offset); - frame = skb; -- else { -- unsigned int hlen = ALIGN(extra_headroom, 4); -- /* -- * Allocate and reserve two bytes more for payload -- * alignment since sizeof(struct ethhdr) is 14. -- */ -- frame = dev_alloc_skb(hlen + subframe_len + 2); -+ reuse_skb = true; -+ } else { -+ frame = __ieee80211_amsdu_copy(skb, hlen, offset, len); - if (!frame) - goto purge; - -- skb_reserve(frame, hlen + sizeof(struct ethhdr) + 2); -- memcpy(skb_put(frame, ntohs(len)), skb->data, -- ntohs(len)); -- -- eth = (struct ethhdr *)skb_pull(skb, ntohs(len) + -- padding); -- if (!eth) { -- dev_kfree_skb(frame); -- goto purge; -- } -+ offset += len + padding; - } - - skb_reset_network_header(frame); -@@ -719,24 +721,20 @@ void ieee80211_amsdu_to_8023s(struct sk_ - - payload = frame->data; - ethertype = (payload[6] << 8) | payload[7]; -- - if (likely((ether_addr_equal(payload, rfc1042_header) && - ethertype != ETH_P_AARP && ethertype != ETH_P_IPX) || - ether_addr_equal(payload, bridge_tunnel_header))) { -- /* remove RFC1042 or Bridge-Tunnel -- * encapsulation and replace EtherType */ -- skb_pull(frame, 6); -- memcpy(skb_push(frame, ETH_ALEN), src, ETH_ALEN); -- memcpy(skb_push(frame, ETH_ALEN), dst, ETH_ALEN); -- } else { -- memcpy(skb_push(frame, sizeof(__be16)), &len, -- sizeof(__be16)); -- memcpy(skb_push(frame, ETH_ALEN), src, ETH_ALEN); -- memcpy(skb_push(frame, ETH_ALEN), dst, ETH_ALEN); -+ eth.h_proto = htons(ethertype); -+ skb_pull(frame, ETH_ALEN + 2); - } -+ -+ memcpy(skb_push(frame, sizeof(eth)), ð, sizeof(eth)); - __skb_queue_tail(list, frame); - } - -+ if (!reuse_skb) -+ dev_kfree_skb(skb); -+ - return; - - purge: |