This patch adds support for async resumptions on input. To do so, the
transform would return -EINPROGRESS and subsequently invoke the
function xfrm_input_resume to resume processing.
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: David S. Miller <davem@davemloft.net>
extern int xfrm_prepare_input(struct xfrm_state *x, struct sk_buff *skb);
extern int xfrm_input(struct sk_buff *skb, int nexthdr, __be32 spi,
int encap_type);
extern int xfrm_prepare_input(struct xfrm_state *x, struct sk_buff *skb);
extern int xfrm_input(struct sk_buff *skb, int nexthdr, __be32 spi,
int encap_type);
+extern int xfrm_input_resume(struct sk_buff *skb, int nexthdr);
extern int xfrm_output_resume(struct sk_buff *skb, int err);
extern int xfrm_output(struct sk_buff *skb);
extern int xfrm4_extract_header(struct sk_buff *skb);
extern int xfrm_output_resume(struct sk_buff *skb, int err);
extern int xfrm_output(struct sk_buff *skb);
extern int xfrm4_extract_header(struct sk_buff *skb);
xfrm4_rcv_encap_finish);
return 0;
#else
xfrm4_rcv_encap_finish);
return 0;
#else
+ if (async)
+ return xfrm4_rcv_encap_finish(skb);
+
return -iph->protocol;
#endif
}
return -iph->protocol;
#endif
}
ip6_rcv_finish);
return -1;
#else
ip6_rcv_finish);
return -1;
#else
+ if (async)
+ return ip6_rcv_finish(skb);
+
int err;
__be32 seq;
struct xfrm_state *x;
int err;
__be32 seq;
struct xfrm_state *x;
- unsigned int daddroff = XFRM_SPI_SKB_CB(skb)->daddroff;
+ int async = 0;
+
+ /* A negative encap_type indicates async resumption. */
+ if (encap_type < 0) {
+ async = 1;
+ x = skb->sp->xvec[skb->sp->len - 1];
+ seq = XFRM_SKB_CB(skb)->seq;
+ goto resume;
+ }
/* Allocate new secpath or COW existing one. */
if (!skb->sp || atomic_read(&skb->sp->refcnt) != 1) {
/* Allocate new secpath or COW existing one. */
if (!skb->sp || atomic_read(&skb->sp->refcnt) != 1) {
+ daddr = (xfrm_address_t *)(skb_network_header(skb) +
+ XFRM_SPI_SKB_CB(skb)->daddroff);
+
seq = 0;
if (!spi && (err = xfrm_parse_spi(skb, nexthdr, &spi, &seq)) != 0)
goto drop;
seq = 0;
if (!spi && (err = xfrm_parse_spi(skb, nexthdr, &spi, &seq)) != 0)
goto drop;
if (skb->sp->len == XFRM_MAX_DEPTH)
goto drop;
if (skb->sp->len == XFRM_MAX_DEPTH)
goto drop;
- x = xfrm_state_lookup((xfrm_address_t *)
- (skb_network_header(skb) + daddroff),
- spi, nexthdr, AF_INET);
+ x = xfrm_state_lookup(daddr, spi, nexthdr, AF_INET);
if (x == NULL)
goto drop;
if (x == NULL)
goto drop;
+ XFRM_SKB_CB(skb)->seq = seq;
+
nexthdr = x->type->input(x, skb);
nexthdr = x->type->input(x, skb);
+ if (nexthdr == -EINPROGRESS)
+ return 0;
+
+resume:
spin_lock(&x->lock);
if (nexthdr <= 0) {
if (nexthdr == -EBADMSG)
spin_lock(&x->lock);
if (nexthdr <= 0) {
if (nexthdr == -EBADMSG)
+ /*
+ * We need the inner address. However, we only get here for
+ * transport mode so the outer address is identical.
+ */
+ daddr = &x->id.daddr;
+
err = xfrm_parse_spi(skb, nexthdr, &spi, &seq);
if (err < 0)
goto drop;
err = xfrm_parse_spi(skb, nexthdr, &spi, &seq);
if (err < 0)
goto drop;
netif_rx(skb);
return 0;
} else {
netif_rx(skb);
return 0;
} else {
- return x->inner_mode->afinfo->transport_finish(skb, 0);
+ return x->inner_mode->afinfo->transport_finish(skb, async);
}
EXPORT_SYMBOL(xfrm_input);
}
EXPORT_SYMBOL(xfrm_input);
+int xfrm_input_resume(struct sk_buff *skb, int nexthdr)
+{
+ return xfrm_input(skb, nexthdr, 0, -1);
+}
+EXPORT_SYMBOL(xfrm_input_resume);
+
void __init xfrm_input_init(void)
{
secpath_cachep = kmem_cache_create("secpath_cache",
void __init xfrm_input_init(void)
{
secpath_cachep = kmem_cache_create("secpath_cache",