net: ipv4: convert to SKB frag APIs

Signed-off-by: Ian Campbell <ian.campbell@citrix.com>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Alexey Kuznetsov <kuznet@ms2.inr.ac.ru>
Cc: "Pekka Savola (ipv6)" <pekkas@netcore.fi>
Cc: James Morris <jmorris@namei.org>
Cc: Hideaki YOSHIFUJI <yoshfuji@linux-ipv6.org>
Cc: Patrick McHardy <kaber@trash.net>
Cc: netdev@vger.kernel.org
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/net/ipv4/inet_lro.c b/net/ipv4/inet_lro.c
index ef7ae60..8e6be5a 100644 (file)
--- a/net/ipv4/inet_lro.c
+++ b/net/ipv4/inet_lro.c
@@ -433,7 +433,7 @@ static struct sk_buff *__lro_proc_segment(struct net_lro_mgr *lro_mgr,
        if (!lro_mgr->get_frag_header ||
            lro_mgr->get_frag_header(frags, (void *)&mac_hdr, (void *)&iph,
                                     (void *)&tcph, &flags, priv)) {
-               mac_hdr = page_address(frags->page) + frags->page_offset;
+               mac_hdr = skb_frag_address(frags);
                goto out1;
        }
 

diff --git a/net/ipv4/ip_output.c b/net/ipv4/ip_output.c
index 8c65633..ae3bb14 100644 (file)
--- a/net/ipv4/ip_output.c
+++ b/net/ipv4/ip_output.c
@@ -989,13 +989,13 @@ alloc_new_skb:
                        if (page && (left = PAGE_SIZE - off) > 0) {
                                if (copy >= left)
                                        copy = left;
-                               if (page != frag->page) {
+                               if (page != skb_frag_page(frag)) {
                                        if (i == MAX_SKB_FRAGS) {
                                                err = -EMSGSIZE;
                                                goto error;
                                        }
-                                       get_page(page);
                                        skb_fill_page_desc(skb, i, page, off, 0);
+                                       skb_frag_ref(skb, i);
                                        frag = &skb_shinfo(skb)->frags[i];
                                }
                        } else if (i < MAX_SKB_FRAGS) {
@@ -1015,7 +1015,8 @@ alloc_new_skb:
                                err = -EMSGSIZE;
                                goto error;
                        }
-                       if (getfrag(from, page_address(frag->page)+frag->page_offset+frag->size, offset, copy, skb->len, skb) < 0) {
+                       if (getfrag(from, skb_frag_address(frag)+frag->size,
+                                   offset, copy, skb->len, skb) < 0) {
                                err = -EFAULT;
                                goto error;
                        }

diff --git a/net/ipv4/tcp.c b/net/ipv4/tcp.c
index 46febca..5fe632c 100644 (file)
--- a/net/ipv4/tcp.c
+++ b/net/ipv4/tcp.c
@@ -3035,7 +3035,8 @@ int tcp_md5_hash_skb_data(struct tcp_md5sig_pool *hp,
 
        for (i = 0; i < shi->nr_frags; ++i) {
                const struct skb_frag_struct *f = &shi->frags[i];
-               sg_set_page(&sg, f->page, f->size, f->page_offset);
+               struct page *page = skb_frag_page(f);
+               sg_set_page(&sg, page, f->size, f->page_offset);
                if (crypto_hash_update(desc, &sg, f->size))
                        return 1;
        }

diff --git a/net/ipv4/tcp_output.c b/net/ipv4/tcp_output.c
index 882e0b0..0377c06 100644 (file)
--- a/net/ipv4/tcp_output.c
+++ b/net/ipv4/tcp_output.c
@@ -1095,7 +1095,7 @@ static void __pskb_trim_head(struct sk_buff *skb, int len)
        k = 0;
        for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) {
                if (skb_shinfo(skb)->frags[i].size <= eat) {
-                       put_page(skb_shinfo(skb)->frags[i].page);
+                       skb_frag_unref(skb, i);
                        eat -= skb_shinfo(skb)->frags[i].size;
                } else {
                        skb_shinfo(skb)->frags[k] = skb_shinfo(skb)->frags[i];