From 1ce3644ade9c865c755bf0f6a4e109b7bb6eb60f Mon Sep 17 00:00:00 2001 From: Steffen Klassert Date: Tue, 8 Mar 2011 00:06:31 +0000 Subject: [PATCH] xfrm: Use separate low and high order bits of the sequence numbers in xfrm_skb_cb To support IPsec extended sequence numbers, we split the output sequence numbers of xfrm_skb_cb in low and high order 32 bits and we add the high order 32 bits to the input sequence numbers. All users are updated accordingly. Signed-off-by: Steffen Klassert Acked-by: Herbert Xu Signed-off-by: David S. Miller --- include/net/xfrm.h | 10 ++++++++-- net/ipv4/ah4.c | 2 +- net/ipv4/esp4.c | 4 ++-- net/ipv6/ah6.c | 2 +- net/ipv6/esp6.c | 4 ++-- net/xfrm/xfrm_input.c | 4 ++-- net/xfrm/xfrm_output.c | 2 +- 7 files changed, 17 insertions(+), 11 deletions(-) diff --git a/include/net/xfrm.h b/include/net/xfrm.h index 7640822bc51..cb6d9b3fc55 100644 --- a/include/net/xfrm.h +++ b/include/net/xfrm.h @@ -582,8 +582,14 @@ struct xfrm_skb_cb { /* Sequence number for replay protection. */ union { - u64 output; - __be32 input; + struct { + __u32 low; + __u32 hi; + } output; + struct { + __be32 low; + __be32 hi; + } input; } seq; }; diff --git a/net/ipv4/ah4.c b/net/ipv4/ah4.c index 325053df6e7..4286fd3cc0e 100644 --- a/net/ipv4/ah4.c +++ b/net/ipv4/ah4.c @@ -208,7 +208,7 @@ static int ah_output(struct xfrm_state *x, struct sk_buff *skb) ah->reserved = 0; ah->spi = x->id.spi; - ah->seq_no = htonl(XFRM_SKB_CB(skb)->seq.output); + ah->seq_no = htonl(XFRM_SKB_CB(skb)->seq.output.low); sg_init_table(sg, nfrags); skb_to_sgvec(skb, sg, 0, skb->len); diff --git a/net/ipv4/esp4.c b/net/ipv4/esp4.c index e42a905180f..882dbbb7d79 100644 --- a/net/ipv4/esp4.c +++ b/net/ipv4/esp4.c @@ -215,7 +215,7 @@ static int esp_output(struct xfrm_state *x, struct sk_buff *skb) } esph->spi = x->id.spi; - esph->seq_no = htonl(XFRM_SKB_CB(skb)->seq.output); + esph->seq_no = htonl(XFRM_SKB_CB(skb)->seq.output.low); sg_init_table(sg, nfrags); skb_to_sgvec(skb, sg, @@ -227,7 +227,7 @@ static int esp_output(struct xfrm_state *x, struct sk_buff *skb) aead_givcrypt_set_crypt(req, sg, sg, clen, iv); aead_givcrypt_set_assoc(req, asg, sizeof(*esph)); aead_givcrypt_set_giv(req, esph->enc_data, - XFRM_SKB_CB(skb)->seq.output); + XFRM_SKB_CB(skb)->seq.output.low); ESP_SKB_CB(skb)->tmp = tmp; err = crypto_aead_givencrypt(req); diff --git a/net/ipv6/ah6.c b/net/ipv6/ah6.c index 1aba54ae53c..2195ae65192 100644 --- a/net/ipv6/ah6.c +++ b/net/ipv6/ah6.c @@ -409,7 +409,7 @@ static int ah6_output(struct xfrm_state *x, struct sk_buff *skb) ah->reserved = 0; ah->spi = x->id.spi; - ah->seq_no = htonl(XFRM_SKB_CB(skb)->seq.output); + ah->seq_no = htonl(XFRM_SKB_CB(skb)->seq.output.low); sg_init_table(sg, nfrags); skb_to_sgvec(skb, sg, 0, skb->len); diff --git a/net/ipv6/esp6.c b/net/ipv6/esp6.c index 1b5c9825743..c7b5d5ee0de 100644 --- a/net/ipv6/esp6.c +++ b/net/ipv6/esp6.c @@ -204,7 +204,7 @@ static int esp6_output(struct xfrm_state *x, struct sk_buff *skb) *skb_mac_header(skb) = IPPROTO_ESP; esph->spi = x->id.spi; - esph->seq_no = htonl(XFRM_SKB_CB(skb)->seq.output); + esph->seq_no = htonl(XFRM_SKB_CB(skb)->seq.output.low); sg_init_table(sg, nfrags); skb_to_sgvec(skb, sg, @@ -216,7 +216,7 @@ static int esp6_output(struct xfrm_state *x, struct sk_buff *skb) aead_givcrypt_set_crypt(req, sg, sg, clen, iv); aead_givcrypt_set_assoc(req, asg, sizeof(*esph)); aead_givcrypt_set_giv(req, esph->enc_data, - XFRM_SKB_CB(skb)->seq.output); + XFRM_SKB_CB(skb)->seq.output.low); ESP_SKB_CB(skb)->tmp = tmp; err = crypto_aead_givencrypt(req); diff --git a/net/xfrm/xfrm_input.c b/net/xfrm/xfrm_input.c index 45f1c98d4fc..b173b7fdc43 100644 --- a/net/xfrm/xfrm_input.c +++ b/net/xfrm/xfrm_input.c @@ -118,7 +118,7 @@ int xfrm_input(struct sk_buff *skb, int nexthdr, __be32 spi, int encap_type) if (encap_type < 0) { async = 1; x = xfrm_input_state(skb); - seq = XFRM_SKB_CB(skb)->seq.input; + seq = XFRM_SKB_CB(skb)->seq.input.low; goto resume; } @@ -184,7 +184,7 @@ int xfrm_input(struct sk_buff *skb, int nexthdr, __be32 spi, int encap_type) spin_unlock(&x->lock); - XFRM_SKB_CB(skb)->seq.input = seq; + XFRM_SKB_CB(skb)->seq.input.low = seq; nexthdr = x->type->input(x, skb); diff --git a/net/xfrm/xfrm_output.c b/net/xfrm/xfrm_output.c index 64f2ae1fdc1..4b63776a026 100644 --- a/net/xfrm/xfrm_output.c +++ b/net/xfrm/xfrm_output.c @@ -68,7 +68,7 @@ static int xfrm_output_one(struct sk_buff *skb, int err) } if (x->type->flags & XFRM_TYPE_REPLAY_PROT) { - XFRM_SKB_CB(skb)->seq.output = ++x->replay.oseq; + XFRM_SKB_CB(skb)->seq.output.low = ++x->replay.oseq; if (unlikely(x->replay.oseq == 0)) { XFRM_INC_STATS(net, LINUX_MIB_XFRMOUTSTATESEQERROR); x->replay.oseq--; -- 2.20.1