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| author | Hannes Frederic Sowa <hannes@stressinduktion.org> | 2015-05-21 16:59:58 +0200 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2015-05-25 00:06:58 -0400 |
| commit | be12a1fe298e8be04d5215364f94654dff81b0bc (patch) | |
| tree | 46d7ade56605d55a306c400ab54fed896ec63361 | |
| parent | d98c3edcbbbfae903f138edd7855544cd8d09bc2 (diff) | |
| download | lwn-be12a1fe298e8be04d5215364f94654dff81b0bc.tar.gz lwn-be12a1fe298e8be04d5215364f94654dff81b0bc.zip | |
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>
| -rw-r--r-- | include/linux/skbuff.h | 3 | ||||
| -rw-r--r-- | net/core/skbuff.c | 18 | ||||
| -rw-r--r-- | net/ipv4/ip_output.c | 15 |
3 files changed, 25 insertions, 11 deletions
diff --git a/include/linux/skbuff.h b/include/linux/skbuff.h index b617095adb88..f708936cdd23 100644 --- a/include/linux/skbuff.h +++ b/include/linux/skbuff.h @@ -861,6 +861,9 @@ int skb_append_datato_frags(struct sock *sk, struct sk_buff *skb, int len, int odd, struct sk_buff *skb), void *from, int length); +int skb_append_pagefrags(struct sk_buff *skb, struct page *page, + int offset, size_t size); + struct skb_seq_state { __u32 lower_offset; __u32 upper_offset; 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; } |