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authorHannes Frederic Sowa <hannes@stressinduktion.org>2015-05-21 16:59:58 +0200
committerDavid S. Miller <davem@davemloft.net>2015-05-25 00:06:58 -0400
commitbe12a1fe298e8be04d5215364f94654dff81b0bc (patch)
tree46d7ade56605d55a306c400ab54fed896ec63361 /net
parentd98c3edcbbbfae903f138edd7855544cd8d09bc2 (diff)
net: skbuff: add skb_append_pagefrags and use it
Signed-off-by: Hannes Frederic Sowa <hannes@stressinduktion.org> Acked-by: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net')
-rw-r--r--net/core/skbuff.c18
-rw-r--r--net/ipv4/ip_output.c15
2 files changed, 22 insertions, 11 deletions
diff --git a/net/core/skbuff.c b/net/core/skbuff.c
index f3fe9bd9e672..4f2babeaf18d 100644
--- a/net/core/skbuff.c
+++ b/net/core/skbuff.c
@@ -2915,6 +2915,24 @@ int skb_append_datato_frags(struct sock *sk, struct sk_buff *skb,
}
EXPORT_SYMBOL(skb_append_datato_frags);
+int skb_append_pagefrags(struct sk_buff *skb, struct page *page,
+ int offset, size_t size)
+{
+ int i = skb_shinfo(skb)->nr_frags;
+
+ if (skb_can_coalesce(skb, i, page, offset)) {
+ skb_frag_size_add(&skb_shinfo(skb)->frags[i - 1], size);
+ } else if (i < MAX_SKB_FRAGS) {
+ get_page(page);
+ skb_fill_page_desc(skb, i, page, offset, size);
+ } else {
+ return -EMSGSIZE;
+ }
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(skb_append_pagefrags);
+
/**
* skb_pull_rcsum - pull skb and update receive checksum
* @skb: buffer to update
diff --git a/net/ipv4/ip_output.c b/net/ipv4/ip_output.c
index 8d91b922fcfe..451b009dae75 100644
--- a/net/ipv4/ip_output.c
+++ b/net/ipv4/ip_output.c
@@ -1233,11 +1233,9 @@ ssize_t ip_append_page(struct sock *sk, struct flowi4 *fl4, struct page *page,
}
while (size > 0) {
- int i;
-
- if (skb_is_gso(skb))
+ if (skb_is_gso(skb)) {
len = size;
- else {
+ } else {
/* Check if the remaining data fits into current packet. */
len = mtu - skb->len;
@@ -1289,15 +1287,10 @@ ssize_t ip_append_page(struct sock *sk, struct flowi4 *fl4, struct page *page,
continue;
}
- i = skb_shinfo(skb)->nr_frags;
if (len > size)
len = size;
- if (skb_can_coalesce(skb, i, page, offset)) {
- skb_frag_size_add(&skb_shinfo(skb)->frags[i-1], len);
- } else if (i < MAX_SKB_FRAGS) {
- get_page(page);
- skb_fill_page_desc(skb, i, page, offset, len);
- } else {
+
+ if (skb_append_pagefrags(skb, page, offset, len)) {
err = -EMSGSIZE;
goto error;
}

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