Pull bugzilla-5764 into release branch

[linux-2.6] / net / core / skbuff.c

diff --git a/net/core/skbuff.c b/net/core/skbuff.c
index 01abf1e8990bd9129fbb87c8a571f8aed15a7dc9..fb3770f9c09405f3dce34e2b429e74d4a9761508 100644 (file)
--- a/net/core/skbuff.c
+++ b/net/core/skbuff.c
@@ -112,6 +112,14 @@ void skb_under_panic(struct sk_buff *skb, int sz, void *here)
        BUG();
 }
 
+void skb_truesize_bug(struct sk_buff *skb)
+{
+       printk(KERN_ERR "SKB BUG: Invalid truesize (%u) "
+              "len=%u, sizeof(sk_buff)=%Zd\n",
+              skb->truesize, skb->len, sizeof(struct sk_buff));
+}
+EXPORT_SYMBOL(skb_truesize_bug);
+
 /*     Allocate a new skbuff. We do this ourselves so we can fill in a few
  *     'private' fields and also do memory statistics to find all the
  *     [BEEP] leaks.
@@ -149,7 +157,7 @@ struct sk_buff *__alloc_skb(unsigned int size, gfp_t gfp_mask,
 
        /* Get the DATA. Size must match skb_add_mtu(). */
        size = SKB_DATA_ALIGN(size);
-       data = kmalloc(size + sizeof(struct skb_shared_info), gfp_mask);
+       data = ____kmalloc(size + sizeof(struct skb_shared_info), gfp_mask);
        if (!data)
                goto nodata;
 
@@ -1795,6 +1803,29 @@ int skb_append_datato_frags(struct sock *sk, struct sk_buff *skb,
        return 0;
 }
 
+/**
+ *     skb_pull_rcsum - pull skb and update receive checksum
+ *     @skb: buffer to update
+ *     @start: start of data before pull
+ *     @len: length of data pulled
+ *
+ *     This function performs an skb_pull on the packet and updates
+ *     update the CHECKSUM_HW checksum.  It should be used on receive
+ *     path processing instead of skb_pull unless you know that the
+ *     checksum difference is zero (e.g., a valid IP header) or you
+ *     are setting ip_summed to CHECKSUM_NONE.
+ */
+unsigned char *skb_pull_rcsum(struct sk_buff *skb, unsigned int len)
+{
+       BUG_ON(len > skb->len);
+       skb->len -= len;
+       BUG_ON(skb->len < skb->data_len);
+       skb_postpull_rcsum(skb, skb->data, len);
+       return skb->data += len;
+}
+
+EXPORT_SYMBOL_GPL(skb_pull_rcsum);
+
 void __init skb_init(void)
 {
        skbuff_head_cache = kmem_cache_create("skbuff_head_cache",