net: gro: move skb_gro_receive into net/core/gro.c

net/core/gro.c will contain all core gro functions,
to shrink net/core/skbuff.c and net/core/dev.c

Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 0 insertions, 117 deletions

diff --git a/net/core/skbuff.c b/net/core/skbuff.c
index 8560d50c960b..73720bc1daa3 100644
--- a/net/core/skbuff.c
+++ b/net/core/skbuff.c
@@ -64,7 +64,6 @@
 
 #include <net/protocol.h>
 #include <net/dst.h>
-#include <net/gro.h>
 #include <net/sock.h>
 #include <net/checksum.h>
 #include <net/ip6_checksum.h>
@@ -4272,122 +4271,6 @@ err:
 }
 EXPORT_SYMBOL_GPL(skb_segment);
 
-int skb_gro_receive(struct sk_buff *p, struct sk_buff *skb)
-{
-	struct skb_shared_info *pinfo, *skbinfo = skb_shinfo(skb);
-	unsigned int offset = skb_gro_offset(skb);
-	unsigned int headlen = skb_headlen(skb);
-	unsigned int len = skb_gro_len(skb);
-	unsigned int delta_truesize;
-	unsigned int new_truesize;
-	struct sk_buff *lp;
-
-	if (unlikely(p->len + len >= 65536 || NAPI_GRO_CB(skb)->flush))
-		return -E2BIG;
-
-	lp = NAPI_GRO_CB(p)->last;
-	pinfo = skb_shinfo(lp);
-
-	if (headlen <= offset) {
-		skb_frag_t *frag;
-		skb_frag_t *frag2;
-		int i = skbinfo->nr_frags;
-		int nr_frags = pinfo->nr_frags + i;
-
-		if (nr_frags > MAX_SKB_FRAGS)
-			goto merge;
-
-		offset -= headlen;
-		pinfo->nr_frags = nr_frags;
-		skbinfo->nr_frags = 0;
-
-		frag = pinfo->frags + nr_frags;
-		frag2 = skbinfo->frags + i;
-		do {
-			*--frag = *--frag2;
-		} while (--i);
-
-		skb_frag_off_add(frag, offset);
-		skb_frag_size_sub(frag, offset);
-
-		/* all fragments truesize : remove (head size + sk_buff) */
-		new_truesize = SKB_TRUESIZE(skb_end_offset(skb));
-		delta_truesize = skb->truesize - new_truesize;
-
-		skb->truesize = new_truesize;
-		skb->len -= skb->data_len;
-		skb->data_len = 0;
-
-		NAPI_GRO_CB(skb)->free = NAPI_GRO_FREE;
-		goto done;
-	} else if (skb->head_frag) {
-		int nr_frags = pinfo->nr_frags;
-		skb_frag_t *frag = pinfo->frags + nr_frags;
-		struct page *page = virt_to_head_page(skb->head);
-		unsigned int first_size = headlen - offset;
-		unsigned int first_offset;
-
-		if (nr_frags + 1 + skbinfo->nr_frags > MAX_SKB_FRAGS)
-			goto merge;
-
-		first_offset = skb->data -
-			       (unsigned char *)page_address(page) +
-			       offset;
-
-		pinfo->nr_frags = nr_frags + 1 + skbinfo->nr_frags;
-
-		__skb_frag_set_page(frag, page);
-		skb_frag_off_set(frag, first_offset);
-		skb_frag_size_set(frag, first_size);
-
-		memcpy(frag + 1, skbinfo->frags, sizeof(*frag) * skbinfo->nr_frags);
-		/* We dont need to clear skbinfo->nr_frags here */
-
-		new_truesize = SKB_DATA_ALIGN(sizeof(struct sk_buff));
-		delta_truesize = skb->truesize - new_truesize;
-		skb->truesize = new_truesize;
-		NAPI_GRO_CB(skb)->free = NAPI_GRO_FREE_STOLEN_HEAD;
-		goto done;
-	}
-
-merge:
-	/* sk owenrship - if any - completely transferred to the aggregated packet */
-	skb->destructor = NULL;
-	delta_truesize = skb->truesize;
-	if (offset > headlen) {
-		unsigned int eat = offset - headlen;
-
-		skb_frag_off_add(&skbinfo->frags[0], eat);
-		skb_frag_size_sub(&skbinfo->frags[0], eat);
-		skb->data_len -= eat;
-		skb->len -= eat;
-		offset = headlen;
-	}
-
-	__skb_pull(skb, offset);
-
-	if (NAPI_GRO_CB(p)->last == p)
-		skb_shinfo(p)->frag_list = skb;
-	else
-		NAPI_GRO_CB(p)->last->next = skb;
-	NAPI_GRO_CB(p)->last = skb;
-	__skb_header_release(skb);
-	lp = p;
-
-done:
-	NAPI_GRO_CB(p)->count++;
-	p->data_len += len;
-	p->truesize += delta_truesize;
-	p->len += len;
-	if (lp != p) {
-		lp->data_len += len;
-		lp->truesize += delta_truesize;
-		lp->len += len;
-	}
-	NAPI_GRO_CB(skb)->same_flow = 1;
-	return 0;
-}
-
 #ifdef CONFIG_SKB_EXTENSIONS
 #define SKB_EXT_ALIGN_VALUE	8
 #define SKB_EXT_CHUNKSIZEOF(x)	(ALIGN((sizeof(x)), SKB_EXT_ALIGN_VALUE) / SKB_EXT_ALIGN_VALUE)