tag rc6

[openwrt/svn-archive/openwrt.git] / openwrt / target / linux / linux-2.4 / patches / generic / 224-tun_get_user_backport.patch

diff --git a/openwrt/target/linux/linux-2.4/patches/generic/224-tun_get_user_backport.patch b/openwrt/target/linux/linux-2.4/patches/generic/224-tun_get_user_backport.patch
deleted file mode 100644 (file)
index 636ffec..0000000
--- a/openwrt/target/linux/linux-2.4/patches/generic/224-tun_get_user_backport.patch
+++ /dev/null
@@ -1,102 +0,0 @@
---- linux-2.4.32/drivers/net/tun.c 2006-10-28 18:21:45.000000000 +0100
-+++ new.linux-2.4.32/drivers/net/tun.c 2006-10-28 18:50:53.000000000 +0100
-@@ -185,22 +185,31 @@
- {
-       struct tun_pi pi = { 0, __constant_htons(ETH_P_IP) };
-       struct sk_buff *skb;
--      size_t len = count;
-+      size_t len = count, align = 0;
- 
-       if (!(tun->flags & TUN_NO_PI)) {
-               if ((len -= sizeof(pi)) > count)
-                       return -EINVAL;
- 
--              memcpy_fromiovec((void *)&pi, iv, sizeof(pi));
-+              if(memcpy_fromiovec((void *)&pi, iv, sizeof(pi)))
-+                      return -EFAULT;
-       }
-- 
--      if (!(skb = alloc_skb(len + 2, GFP_KERNEL))) {
-+
-+      if ((tun->flags & TUN_TYPE_MASK) == TUN_TAP_DEV)
-+              align = NET_IP_ALIGN;
-+  
-+      if (!(skb = alloc_skb(len + align, GFP_KERNEL))) {
-               tun->stats.rx_dropped++;
-               return -ENOMEM;
-       }
- 
--      skb_reserve(skb, 2);
--      memcpy_fromiovec(skb_put(skb, len), iv, len);
-+      if (align)
-+              skb_reserve(skb, align);
-+      if (memcpy_fromiovec(skb_put(skb, len), iv, len)) {
-+              tun->stats.rx_dropped++;
-+              kfree_skb(skb);
-+              return -EFAULT;
-+      }
- 
-       skb->dev = &tun->dev;
-       switch (tun->flags & TUN_TYPE_MASK) {
-@@ -271,7 +271,8 @@
-                       pi.flags |= TUN_PKT_STRIP;
-               }
-  
--              memcpy_toiovec(iv, (void *) &pi, sizeof(pi));
-+              if(memcpy_toiovec(iv, (void *) &pi, sizeof(pi)))
-+                      return -EFAULT;
-               total += sizeof(pi);
-       }       
- 
---- linux-2.4.32/include/linux/skbuff.h        2006-10-28 19:31:31.000000000 +0100
-+++ new.linux-2.4.32/include/linux/skbuff.h    2006-10-28 19:29:27.000000000 +0100
-@@ -918,6 +918,49 @@
-       skb->tail+=len;
- }
- 
-+/*
-+ * CPUs often take a performance hit when accessing unaligned memory
-+ * locations. The actual performance hit varies, it can be small if the
-+ * hardware handles it or large if we have to take an exception and fix it
-+ * in software.
-+ *
-+ * Since an ethernet header is 14 bytes network drivers often end up with
-+ * the IP header at an unaligned offset. The IP header can be aligned by
-+ * shifting the start of the packet by 2 bytes. Drivers should do this
-+ * with:
-+ *
-+ * skb_reserve(NET_IP_ALIGN);
-+ *
-+ * The downside to this alignment of the IP header is that the DMA is now
-+ * unaligned. On some architectures the cost of an unaligned DMA is high
-+ * and this cost outweighs the gains made by aligning the IP header.
-+ * 
-+ * Since this trade off varies between architectures, we allow NET_IP_ALIGN
-+ * to be overridden.
-+ */
-+#ifndef NET_IP_ALIGN
-+#define NET_IP_ALIGN    2
-+#endif
-+
-+/*
-+ * The networking layer reserves some headroom in skb data (via
-+ * dev_alloc_skb). This is used to avoid having to reallocate skb data when
-+ * the header has to grow. In the default case, if the header has to grow
-+ * 16 bytes or less we avoid the reallocation.
-+ *
-+ * Unfortunately this headroom changes the DMA alignment of the resulting
-+ * network packet. As for NET_IP_ALIGN, this unaligned DMA is expensive
-+ * on some architectures. An architecture can override this value,
-+ * perhaps setting it to a cacheline in size (since that will maintain
-+ * cacheline alignment of the DMA). It must be a power of 2.
-+ *
-+ * Various parts of the networking layer expect at least 16 bytes of
-+ * headroom, you should not reduce this.
-+ */
-+#ifndef NET_SKB_PAD
-+#define NET_SKB_PAD     16
-+#endif
-+ 
- extern int ___pskb_trim(struct sk_buff *skb, unsigned int len, int realloc);
- 
- static inline void __skb_trim(struct sk_buff *skb, unsigned int len)