[IPSEC]: Move integrity stat collection into xfrm_input
Similar to the moving out of the replay processing on the output, this patch moves the integrity stat collectin from x->type->input into xfrm_input. This would eventually allow transforms such as AH/ESP to be lockless. The error value EBADMSG (currently unused in the crypto layer) is used to indicate a failed integrity check. In future this error can be directly returned by the crypto layer once we switch to aead algorithms. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au> Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
parent
b2aa5e9d43
commit
668dc8af31
|
@ -177,9 +177,8 @@ static int ah_input(struct xfrm_state *x, struct sk_buff *skb)
|
|||
err = ah_mac_digest(ahp, skb, ah->auth_data);
|
||||
if (err)
|
||||
goto out;
|
||||
err = -EINVAL;
|
||||
if (memcmp(ahp->work_icv, auth_data, ahp->icv_trunc_len)) {
|
||||
x->stats.integrity_failed++;
|
||||
err = -EBADMSG;
|
||||
goto out;
|
||||
}
|
||||
}
|
||||
|
|
|
@ -163,7 +163,7 @@ static int esp_input(struct xfrm_state *x, struct sk_buff *skb)
|
|||
u8 nexthdr[2];
|
||||
struct scatterlist *sg;
|
||||
int padlen;
|
||||
int err;
|
||||
int err = -EINVAL;
|
||||
|
||||
if (!pskb_may_pull(skb, sizeof(*esph)))
|
||||
goto out;
|
||||
|
@ -183,13 +183,14 @@ static int esp_input(struct xfrm_state *x, struct sk_buff *skb)
|
|||
BUG();
|
||||
|
||||
if (unlikely(memcmp(esp->auth.work_icv, sum, alen))) {
|
||||
x->stats.integrity_failed++;
|
||||
err = -EBADMSG;
|
||||
goto out;
|
||||
}
|
||||
}
|
||||
|
||||
if ((nfrags = skb_cow_data(skb, 0, &trailer)) < 0)
|
||||
if ((err = skb_cow_data(skb, 0, &trailer)) < 0)
|
||||
goto out;
|
||||
nfrags = err;
|
||||
|
||||
skb->ip_summed = CHECKSUM_NONE;
|
||||
|
||||
|
@ -202,6 +203,7 @@ static int esp_input(struct xfrm_state *x, struct sk_buff *skb)
|
|||
sg = &esp->sgbuf[0];
|
||||
|
||||
if (unlikely(nfrags > ESP_NUM_FAST_SG)) {
|
||||
err = -ENOMEM;
|
||||
sg = kmalloc(sizeof(struct scatterlist)*nfrags, GFP_ATOMIC);
|
||||
if (!sg)
|
||||
goto out;
|
||||
|
@ -214,11 +216,12 @@ static int esp_input(struct xfrm_state *x, struct sk_buff *skb)
|
|||
if (unlikely(sg != &esp->sgbuf[0]))
|
||||
kfree(sg);
|
||||
if (unlikely(err))
|
||||
return err;
|
||||
goto out;
|
||||
|
||||
if (skb_copy_bits(skb, skb->len-alen-2, nexthdr, 2))
|
||||
BUG();
|
||||
|
||||
err = -EINVAL;
|
||||
padlen = nexthdr[0];
|
||||
if (padlen+2 >= elen)
|
||||
goto out;
|
||||
|
@ -276,7 +279,7 @@ static int esp_input(struct xfrm_state *x, struct sk_buff *skb)
|
|||
return nexthdr[1];
|
||||
|
||||
out:
|
||||
return -EINVAL;
|
||||
return err;
|
||||
}
|
||||
|
||||
static u32 esp4_get_mtu(struct xfrm_state *x, int mtu)
|
||||
|
|
|
@ -379,10 +379,9 @@ static int ah6_input(struct xfrm_state *x, struct sk_buff *skb)
|
|||
err = ah_mac_digest(ahp, skb, ah->auth_data);
|
||||
if (err)
|
||||
goto free_out;
|
||||
err = -EINVAL;
|
||||
if (memcmp(ahp->work_icv, auth_data, ahp->icv_trunc_len)) {
|
||||
LIMIT_NETDEBUG(KERN_WARNING "ipsec ah authentication error\n");
|
||||
x->stats.integrity_failed++;
|
||||
err = -EBADMSG;
|
||||
goto free_out;
|
||||
}
|
||||
}
|
||||
|
|
|
@ -177,8 +177,7 @@ static int esp6_input(struct xfrm_state *x, struct sk_buff *skb)
|
|||
BUG();
|
||||
|
||||
if (unlikely(memcmp(esp->auth.work_icv, sum, alen))) {
|
||||
x->stats.integrity_failed++;
|
||||
ret = -EINVAL;
|
||||
ret = -EBADMSG;
|
||||
goto out;
|
||||
}
|
||||
}
|
||||
|
|
|
@ -147,8 +147,11 @@ int xfrm_input(struct sk_buff *skb, int nexthdr, __be32 spi, int encap_type)
|
|||
goto drop_unlock;
|
||||
|
||||
nexthdr = x->type->input(x, skb);
|
||||
if (nexthdr <= 0)
|
||||
if (nexthdr <= 0) {
|
||||
if (nexthdr == -EBADMSG)
|
||||
x->stats.integrity_failed++;
|
||||
goto drop_unlock;
|
||||
}
|
||||
|
||||
skb_network_header(skb)[nhoff] = nexthdr;
|
||||
|
||||
|
|
Loading…
Reference in a new issue