Gitweb:
http://git.kernel.org/git/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=668dc8af3150f837f7f0461001bbbc0ce25d7bdf
Commit: 668dc8af3150f837f7f0461001bbbc0ce25d7bdf
Parent: b2aa5e9d43a38dcdfa0878ed750cf32f98460278
Author: Herbert Xu <[EMAIL PROTECTED]>
AuthorDate: Sun Dec 16 15:55:02 2007 -0800
Committer: David S. Miller <[EMAIL PROTECTED]>
CommitDate: Mon Jan 28 14:53:51 2008 -0800
[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 <[EMAIL PROTECTED]>
Signed-off-by: David S. Miller <[EMAIL PROTECTED]>
---
net/ipv4/ah4.c | 3 +--
net/ipv4/esp4.c | 13 ++++++++-----
net/ipv6/ah6.c | 3 +--
net/ipv6/esp6.c | 3 +--
net/xfrm/xfrm_input.c | 5 ++++-
5 files changed, 15 insertions(+), 12 deletions(-)
diff --git a/net/ipv4/ah4.c b/net/ipv4/ah4.c
index 5fc346d..a989d29 100644
--- a/net/ipv4/ah4.c
+++ b/net/ipv4/ah4.c
@@ -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;
}
}
diff --git a/net/ipv4/esp4.c b/net/ipv4/esp4.c
index 1738113..3350a7d 100644
--- a/net/ipv4/esp4.c
+++ b/net/ipv4/esp4.c
@@ -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)
diff --git a/net/ipv6/ah6.c b/net/ipv6/ah6.c
index 4eaf550..d4b59ec 100644
--- a/net/ipv6/ah6.c
+++ b/net/ipv6/ah6.c
@@ -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;
}
}
diff --git a/net/ipv6/esp6.c b/net/ipv6/esp6.c
index 4440532..096974b 100644
--- a/net/ipv6/esp6.c
+++ b/net/ipv6/esp6.c
@@ -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;
}
}
diff --git a/net/xfrm/xfrm_input.c b/net/xfrm/xfrm_input.c
index 587f347..b7d68eb 100644
--- a/net/xfrm/xfrm_input.c
+++ b/net/xfrm/xfrm_input.c
@@ -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;
-
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