diff options
Diffstat (limited to 'net/core/skbuff.c')
| -rw-r--r-- | net/core/skbuff.c | 29 |
1 files changed, 28 insertions, 1 deletions
diff --git a/net/core/skbuff.c b/net/core/skbuff.c index d04c2d1c8c87..4cc594cdaada 100644 --- a/net/core/skbuff.c +++ b/net/core/skbuff.c @@ -3076,8 +3076,9 @@ struct sk_buff *skb_segment(struct sk_buff *head_skb, struct sk_buff *frag_skb = head_skb; unsigned int offset = doffset; unsigned int tnl_hlen = skb_tnl_header_len(head_skb); + unsigned int partial_segs = 0; unsigned int headroom; - unsigned int len; + unsigned int len = head_skb->len; __be16 proto; bool csum; int sg = !!(features & NETIF_F_SG); @@ -3094,6 +3095,15 @@ struct sk_buff *skb_segment(struct sk_buff *head_skb, csum = !!can_checksum_protocol(features, proto); + /* GSO partial only requires that we trim off any excess that + * doesn't fit into an MSS sized block, so take care of that + * now. + */ + if (features & NETIF_F_GSO_PARTIAL) { + partial_segs = len / mss; + mss *= partial_segs; + } + headroom = skb_headroom(head_skb); pos = skb_headlen(head_skb); @@ -3281,6 +3291,23 @@ perform_csum_check: */ segs->prev = tail; + /* Update GSO info on first skb in partial sequence. */ + if (partial_segs) { + int type = skb_shinfo(head_skb)->gso_type; + + /* Update type to add partial and then remove dodgy if set */ + type |= SKB_GSO_PARTIAL; + type &= ~SKB_GSO_DODGY; + + /* Update GSO info and prepare to start updating headers on + * our way back down the stack of protocols. + */ + skb_shinfo(segs)->gso_size = skb_shinfo(head_skb)->gso_size; + skb_shinfo(segs)->gso_segs = partial_segs; + skb_shinfo(segs)->gso_type = type; + SKB_GSO_CB(segs)->data_offset = skb_headroom(segs) + doffset; + } + /* Following permits correct backpressure, for protocols * using skb_set_owner_w(). * Idea is to tranfert ownership from head_skb to last segment. |