diff options
Diffstat (limited to 'net')
| -rw-r--r-- | net/core/skbuff.c | 31 | ||||
| -rw-r--r-- | net/sctp/output.c | 9 |
2 files changed, 22 insertions, 18 deletions
diff --git a/net/core/skbuff.c b/net/core/skbuff.c index 0ab32fa..31aab53 100644 --- a/net/core/skbuff.c +++ b/net/core/skbuff.c @@ -1928,9 +1928,8 @@ fault: EXPORT_SYMBOL(skb_store_bits); /* Checksum skb data. */ - -__wsum skb_checksum(const struct sk_buff *skb, int offset, - int len, __wsum csum) +__wsum __skb_checksum(const struct sk_buff *skb, int offset, int len, + __wsum csum, const struct skb_checksum_ops *ops) { int start = skb_headlen(skb); int i, copy = start - offset; @@ -1941,7 +1940,7 @@ __wsum skb_checksum(const struct sk_buff *skb, int offset, if (copy > 0) { if (copy > len) copy = len; - csum = csum_partial(skb->data + offset, copy, csum); + csum = ops->update(skb->data + offset, copy, csum); if ((len -= copy) == 0) return csum; offset += copy; @@ -1962,10 +1961,10 @@ __wsum skb_checksum(const struct sk_buff *skb, int offset, if (copy > len) copy = len; vaddr = kmap_atomic(skb_frag_page(frag)); - csum2 = csum_partial(vaddr + frag->page_offset + - offset - start, copy, 0); + csum2 = ops->update(vaddr + frag->page_offset + + offset - start, copy, 0); kunmap_atomic(vaddr); - csum = csum_block_add(csum, csum2, pos); + csum = ops->combine(csum, csum2, pos, copy); if (!(len -= copy)) return csum; offset += copy; @@ -1984,9 +1983,9 @@ __wsum skb_checksum(const struct sk_buff *skb, int offset, __wsum csum2; if (copy > len) copy = len; - csum2 = skb_checksum(frag_iter, offset - start, - copy, 0); - csum = csum_block_add(csum, csum2, pos); + csum2 = __skb_checksum(frag_iter, offset - start, + copy, 0, ops); + csum = ops->combine(csum, csum2, pos, copy); if ((len -= copy) == 0) return csum; offset += copy; @@ -1998,6 +1997,18 @@ __wsum skb_checksum(const struct sk_buff *skb, int offset, return csum; } +EXPORT_SYMBOL(__skb_checksum); + +__wsum skb_checksum(const struct sk_buff *skb, int offset, + int len, __wsum csum) +{ + const struct skb_checksum_ops ops = { + .update = csum_partial, + .combine = csum_block_add_ext, + }; + + return __skb_checksum(skb, offset, len, csum, &ops); +} EXPORT_SYMBOL(skb_checksum); /* Both of above in one bottle. */ diff --git a/net/sctp/output.c b/net/sctp/output.c index 3191373..e650978 100644 --- a/net/sctp/output.c +++ b/net/sctp/output.c @@ -390,7 +390,6 @@ int sctp_packet_transmit(struct sctp_packet *packet) __u8 has_data = 0; struct dst_entry *dst = tp->dst; unsigned char *auth = NULL; /* pointer to auth in skb data */ - __u32 cksum_buf_len = sizeof(struct sctphdr); pr_debug("%s: packet:%p\n", __func__, packet); @@ -493,7 +492,6 @@ int sctp_packet_transmit(struct sctp_packet *packet) if (chunk == packet->auth) auth = skb_tail_pointer(nskb); - cksum_buf_len += chunk->skb->len; memcpy(skb_put(nskb, chunk->skb->len), chunk->skb->data, chunk->skb->len); @@ -538,12 +536,7 @@ int sctp_packet_transmit(struct sctp_packet *packet) if (!sctp_checksum_disable) { if (!(dst->dev->features & NETIF_F_SCTP_CSUM) || (dst_xfrm(dst) != NULL) || packet->ipfragok) { - __u32 crc32 = sctp_start_cksum((__u8 *)sh, cksum_buf_len); - - /* 3) Put the resultant value into the checksum field in the - * common header, and leave the rest of the bits unchanged. - */ - sh->checksum = sctp_end_cksum(crc32); + sh->checksum = sctp_compute_cksum(nskb, 0); } else { /* no need to seed pseudo checksum for SCTP */ nskb->ip_summed = CHECKSUM_PARTIAL; |