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tls: rx: strp: factor out copying skb data
We'll need to copy input skbs individually in the next patch. Factor that code out (without assuming we're copying a full record). Tested-by: Shai Amiram <samiram@nvidia.com> Signed-off-by: Jakub Kicinski <kuba@kernel.org> Reviewed-by: Simon Horman <simon.horman@corigine.com> Signed-off-by: David S. Miller <davem@davemloft.net>
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1 changed files with 23 additions and 10 deletions
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@ -34,31 +34,44 @@ static void tls_strp_anchor_free(struct tls_strparser *strp)
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strp->anchor = NULL;
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}
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/* Create a new skb with the contents of input copied to its page frags */
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static struct sk_buff *tls_strp_msg_make_copy(struct tls_strparser *strp)
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static struct sk_buff *
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tls_strp_skb_copy(struct tls_strparser *strp, struct sk_buff *in_skb,
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int offset, int len)
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{
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struct strp_msg *rxm;
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struct sk_buff *skb;
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int i, err, offset;
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int i, err;
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skb = alloc_skb_with_frags(0, strp->stm.full_len, TLS_PAGE_ORDER,
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skb = alloc_skb_with_frags(0, len, TLS_PAGE_ORDER,
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&err, strp->sk->sk_allocation);
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if (!skb)
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return NULL;
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offset = strp->stm.offset;
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for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) {
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skb_frag_t *frag = &skb_shinfo(skb)->frags[i];
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WARN_ON_ONCE(skb_copy_bits(strp->anchor, offset,
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WARN_ON_ONCE(skb_copy_bits(in_skb, offset,
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skb_frag_address(frag),
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skb_frag_size(frag)));
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offset += skb_frag_size(frag);
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}
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skb->len = strp->stm.full_len;
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skb->data_len = strp->stm.full_len;
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skb_copy_header(skb, strp->anchor);
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skb->len = len;
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skb->data_len = len;
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skb_copy_header(skb, in_skb);
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return skb;
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}
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/* Create a new skb with the contents of input copied to its page frags */
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static struct sk_buff *tls_strp_msg_make_copy(struct tls_strparser *strp)
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{
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struct strp_msg *rxm;
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struct sk_buff *skb;
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skb = tls_strp_skb_copy(strp, strp->anchor, strp->stm.offset,
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strp->stm.full_len);
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if (!skb)
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return NULL;
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rxm = strp_msg(skb);
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rxm->offset = 0;
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return skb;
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