Signed-off-by: Ian Campbell <ian.campbell@xxxxxxxxxx>
Cc: "David S. Miller" <davem@xxxxxxxxxxxxx>
Cc: Alexey Kuznetsov <kuznet@xxxxxxxxxxxxx>
Cc: "Pekka Savola (ipv6)" <pekkas@xxxxxxxxxx>
Cc: James Morris <jmorris@xxxxxxxxx>
Cc: Hideaki YOSHIFUJI <yoshfuji@xxxxxxxxxxxxxx>
Cc: Patrick McHardy <kaber@xxxxxxxxx>
Cc: Eric Dumazet <eric.dumazet@xxxxxxxxx>
Cc: "Michał Mirosław" <mirq-linux@xxxxxxxxxxxx>
Cc: netdev@xxxxxxxxxxxxxxx
---
include/linux/skbuff.h | 7 +++++--
net/core/skbuff.c | 1 +
net/ipv4/ip_output.c | 2 +-
net/ipv4/tcp.c | 2 +-
4 files changed, 8 insertions(+), 4 deletions(-)
diff --git a/include/linux/skbuff.h b/include/linux/skbuff.h
index faee8d3..fb64a0e 100644
--- a/include/linux/skbuff.h
+++ b/include/linux/skbuff.h
@@ -1931,13 +1931,16 @@ static inline int skb_add_data(struct sk_buff *skb,
}
static inline int skb_can_coalesce(struct sk_buff *skb, int i,
- const struct page *page, int off)
+ const struct page *page,
+ const struct skb_frag_destructor *destroy,
+ int off)
{
if (i) {
struct skb_frag_struct *frag = &skb_shinfo(skb)->frags[i - 1];
return page == skb_frag_page(frag) &&
- off == frag->page_offset + frag->size;
+ off == frag->page_offset + frag->size &&
+ frag->page.destructor == destroy;
}
return 0;
}
diff --git a/net/core/skbuff.c b/net/core/skbuff.c
index 101c9cc..3d89b1a 100644
--- a/net/core/skbuff.c
+++ b/net/core/skbuff.c
@@ -2152,6 +2152,7 @@ int skb_shift(struct sk_buff *tgt, struct sk_buff *skb, int shiftlen)
*/
if (!to ||
!skb_can_coalesce(tgt, to, skb_frag_page(fragfrom),
+ fragfrom->page.destructor,
fragfrom->page_offset)) {
merge = -1;
} else {
diff --git a/net/ipv4/ip_output.c b/net/ipv4/ip_output.c
index 5946de2..c4326fb 100644
--- a/net/ipv4/ip_output.c
+++ b/net/ipv4/ip_output.c
@@ -1224,7 +1224,7 @@ ssize_t ip_append_page(struct sock *sk, struct flowi4 *fl4, struct page *page,
i = skb_shinfo(skb)->nr_frags;
if (len > size)
len = size;
- if (skb_can_coalesce(skb, i, page, offset)) {
+ if (skb_can_coalesce(skb, i, page, NULL, offset)) {
skb_shinfo(skb)->frags[i-1].size += len;
} else if (i < MAX_SKB_FRAGS) {
get_page(page);
diff --git a/net/ipv4/tcp.c b/net/ipv4/tcp.c
index 2f0e985..a1a0ccd 100644
--- a/net/ipv4/tcp.c
+++ b/net/ipv4/tcp.c
@@ -1008,7 +1008,7 @@ new_segment:
struct page *page = TCP_PAGE(sk);
int off = TCP_OFF(sk);
- if (skb_can_coalesce(skb, i, page, off) &&
+ if (skb_can_coalesce(skb, i, page, NULL, off) &&
off != PAGE_SIZE) {
/* We can extend the last page
* fragment. */
--
1.7.2.5
--
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