mirror of
https://github.com/openwrt/openwrt.git
synced 2024-12-30 02:29:01 +00:00
216 lines
6.4 KiB
Diff
216 lines
6.4 KiB
Diff
--- a/ath/if_ath.c
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+++ b/ath/if_ath.c
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@@ -3334,7 +3334,6 @@
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struct ath_softc *sc = dev->priv;
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struct ieee80211_node *ni = NULL;
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struct ath_buf *bf = NULL;
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- struct ether_header *eh;
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ath_bufhead bf_head;
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struct ath_buf *tbf;
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struct sk_buff *tskb;
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@@ -3349,6 +3348,7 @@
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*/
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int requeue = 0;
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#ifdef ATH_SUPERG_FF
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+ struct ether_header *eh;
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unsigned int pktlen;
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struct ieee80211com *ic = &sc->sc_ic;
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struct ath_txq *txq = NULL;
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--- a/net80211/ieee80211_output.c
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+++ b/net80211/ieee80211_output.c
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@@ -280,7 +280,7 @@
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* normal vap. */
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if (vap->iv_xrvap && (ni == vap->iv_bss) &&
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vap->iv_xrvap->iv_sta_assoc) {
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- struct sk_buff *skb1 = skb_copy(skb, GFP_ATOMIC);
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+ struct sk_buff *skb1 = skb_clone(skb, GFP_ATOMIC);
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if (skb1) {
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memset(SKB_CB(skb1), 0, sizeof(struct ieee80211_cb));
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#ifdef IEEE80211_DEBUG_REFCNT
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@@ -561,7 +561,7 @@
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struct ieee80211_key *key, struct sk_buff *skb, int ismulticast)
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{
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/* XXX pre-calculate per node? */
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- int need_headroom = LLC_SNAPFRAMELEN + hdrsize + IEEE80211_ADDR_LEN;
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+ int need_headroom = LLC_SNAPFRAMELEN + hdrsize;
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int need_tailroom = 0;
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#ifdef ATH_SUPERG_FF
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int isff = ATH_FF_MAGIC_PRESENT(skb);
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@@ -603,109 +603,56 @@
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need_tailroom += cip->ic_miclen;
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}
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- if (skb_shared(skb)) {
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- /* Take our own reference to the node in the clone */
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- ieee80211_ref_node(SKB_NI(skb));
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- /* Unshare the node, decrementing users in the old skb */
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- skb = skb_unshare(skb, GFP_ATOMIC);
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+ need_headroom -= skb_headroom(skb);
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+ if (isff)
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+ need_tailroom -= skb_tailroom(skb2);
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+ else
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+ need_tailroom -= skb_tailroom(skb);
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+
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+ if (need_headroom < 0)
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+ need_headroom = 0;
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+ if (need_tailroom < 0)
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+ need_tailroom = 0;
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+
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+ if (skb_cloned(skb) || (need_headroom > 0) ||
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+ (!isff && (need_tailroom > 0))) {
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+
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+ if (pskb_expand_head(skb, need_headroom, need_tailroom, GFP_ATOMIC)) {
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+ IEEE80211_DPRINTF(vap, IEEE80211_MSG_OUTPUT,
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+ "%s: cannot expand storage (tail)\n", __func__);
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+ goto error;
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+ }
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}
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#ifdef ATH_SUPERG_FF
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if (isff) {
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- if (skb == NULL) {
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- IEEE80211_DPRINTF(vap, IEEE80211_MSG_OUTPUT,
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- "%s: cannot unshare for encapsulation\n",
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- __func__);
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- vap->iv_stats.is_tx_nobuf++;
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- ieee80211_dev_kfree_skb(&skb2);
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-
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- return NULL;
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- }
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+ inter_headroom -= skb_headroom(skb2);
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+ if (inter_headroom < 0)
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+ inter_headroom = 0;
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+ if ((skb_cloned(skb2) ||
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+ (inter_headroom > 0) || (need_tailroom > 0))) {
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- /* first skb header */
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- if (skb_headroom(skb) < need_headroom) {
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- struct sk_buff *tmp = skb;
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- skb = skb_realloc_headroom(skb, need_headroom);
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- if (skb == NULL) {
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+ if (pskb_expand_head(skb2, inter_headroom,
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+ need_tailroom, GFP_ATOMIC)) {
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IEEE80211_DPRINTF(vap, IEEE80211_MSG_OUTPUT,
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- "%s: cannot expand storage (head1)\n",
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- __func__);
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- vap->iv_stats.is_tx_nobuf++;
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- ieee80211_dev_kfree_skb(&skb2);
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- return NULL;
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- } else
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- ieee80211_skb_copy_noderef(tmp, skb);
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- ieee80211_dev_kfree_skb(&tmp);
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- /* NB: cb[] area was copied, but not next ptr. must do that
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- * prior to return on success. */
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- }
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-
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- /* second skb with header and tail adjustments possible */
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- if (skb_tailroom(skb2) < need_tailroom) {
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- int n = 0;
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- if (inter_headroom > skb_headroom(skb2))
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- n = inter_headroom - skb_headroom(skb2);
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- if (pskb_expand_head(skb2, n,
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- need_tailroom - skb_tailroom(skb2), GFP_ATOMIC)) {
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- ieee80211_dev_kfree_skb(&skb2);
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- IEEE80211_DPRINTF(vap, IEEE80211_MSG_OUTPUT,
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- "%s: cannot expand storage (tail2)\n",
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- __func__);
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- vap->iv_stats.is_tx_nobuf++;
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- /* this shouldn't happen, but don't send first ff either */
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- ieee80211_dev_kfree_skb(&skb);
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+ "%s: cannot expand storage (tail)\n", __func__);
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+ goto error;
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}
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- } else if (skb_headroom(skb2) < inter_headroom) {
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- struct sk_buff *tmp = skb2;
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-
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- skb2 = skb_realloc_headroom(skb2, inter_headroom);
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- if (skb2 == NULL) {
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- IEEE80211_DPRINTF(vap, IEEE80211_MSG_OUTPUT,
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- "%s: cannot expand storage (head2)\n",
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- __func__);
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- vap->iv_stats.is_tx_nobuf++;
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- /* this shouldn't happen, but don't send first ff either */
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- ieee80211_dev_kfree_skb(&skb);
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- skb = NULL;
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- } else
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- ieee80211_skb_copy_noderef(tmp, skb);
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- ieee80211_dev_kfree_skb(&tmp);
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}
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- if (skb) {
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- skb->next = skb2;
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- }
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- return skb;
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+ skb->next = skb2;
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}
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#endif /* ATH_SUPERG_FF */
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- if (skb == NULL) {
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- IEEE80211_DPRINTF(vap, IEEE80211_MSG_OUTPUT,
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- "%s: cannot unshare for encapsulation\n", __func__);
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- vap->iv_stats.is_tx_nobuf++;
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- } else if (skb_tailroom(skb) < need_tailroom) {
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- int n = 0;
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- if (need_headroom > skb_headroom(skb))
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- n = need_headroom - skb_headroom(skb);
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- if (pskb_expand_head(skb, n, need_tailroom -
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- skb_tailroom(skb), GFP_ATOMIC)) {
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- IEEE80211_DPRINTF(vap, IEEE80211_MSG_OUTPUT,
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- "%s: cannot expand storage (tail)\n", __func__);
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- vap->iv_stats.is_tx_nobuf++;
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- ieee80211_dev_kfree_skb(&skb);
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- }
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- } else if (skb_headroom(skb) < need_headroom) {
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- struct sk_buff *tmp = skb;
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- skb = skb_realloc_headroom(skb, need_headroom);
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- /* Increment reference count after copy */
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- if (skb == NULL) {
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- IEEE80211_DPRINTF(vap, IEEE80211_MSG_OUTPUT,
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- "%s: cannot expand storage (head)\n", __func__);
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- vap->iv_stats.is_tx_nobuf++;
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- } else
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- ieee80211_skb_copy_noderef(tmp, skb);
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- ieee80211_dev_kfree_skb(&tmp);
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- }
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return skb;
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+
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+error:
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+ vap->iv_stats.is_tx_nobuf++;
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+ ieee80211_dev_kfree_skb(&skb);
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+#ifdef ATH_SUPERG_FF
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+ if (skb2)
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+ ieee80211_dev_kfree_skb(&skb2);
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+#endif
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+ return NULL;
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}
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#define KEY_UNDEFINED(k) ((k).wk_cipher == &ieee80211_cipher_none)
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--- a/net80211/ieee80211_input.c
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+++ b/net80211/ieee80211_input.c
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@@ -713,7 +713,7 @@
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/* ether_type must be length as FF frames are always LLC/SNAP encap'd */
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frame_len = ntohs(eh_tmp->ether_type);
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- skb1 = skb_copy(skb, GFP_ATOMIC);
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+ skb1 = skb_clone(skb, GFP_ATOMIC);
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if (skb1 == NULL)
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goto err;
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ieee80211_skb_copy_noderef(skb, skb1);
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@@ -1118,7 +1118,7 @@
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if (ETHER_IS_MULTICAST(eh->ether_dhost) && !netif_queue_stopped(dev)) {
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/* Create a SKB for the BSS to send out. */
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- skb1 = skb_copy(skb, GFP_ATOMIC);
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+ skb1 = skb_clone(skb, GFP_ATOMIC);
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if (skb1)
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SKB_NI(skb1) = ieee80211_ref_node(vap->iv_bss);
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}
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@@ -2265,7 +2265,7 @@
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if (filter_type && ((vap->app_filter & filter_type) == filter_type)) {
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struct sk_buff *skb1;
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- skb1 = skb_copy(skb, GFP_ATOMIC);
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+ skb1 = skb_clone(skb, GFP_ATOMIC);
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if (skb1 == NULL)
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return;
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/* We duplicate the reference after skb_copy */
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