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{pktgen, xfrm} Introduce xfrm_state_lookup_byspi for pktgen

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Introduce xfrm_state_lookup_byspi to find user specified by custom
from "pgset spi xxx". Using this scheme, any flow regardless its
saddr/daddr could be transform by SA specified with configurable
spi.

Signed-off-by: Fan Du <fan.du@windriver.com>
Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com>
This commit is contained in:
Fan Du 2014-01-03 11:18:32 +08:00 committed by Steffen Klassert
parent cf93d47ed4
commit c454997e68
3 changed files with 39 additions and 7 deletions
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2
include/net/xfrm.h
View file

@ -1421,6 +1421,8 @@ struct xfrm_state *xfrm_stateonly_find(struct net *net, u32 mark,
xfrm_address_t *saddr,
unsigned short family,
u8 mode, u8 proto, u32 reqid);
struct xfrm_state *xfrm_state_lookup_byspi(struct net *net, __be32 spi,
unsigned short family);
int xfrm_state_check_expire(struct xfrm_state *x);
void xfrm_state_insert(struct xfrm_state *x);
int xfrm_state_add(struct xfrm_state *x);

22
net/core/pktgen.c
View file

@ -2247,13 +2247,21 @@ static void get_ipsec_sa(struct pktgen_dev *pkt_dev, int flow)
struct xfrm_state *x = pkt_dev->flows[flow].x;
struct pktgen_net *pn = net_generic(dev_net(pkt_dev->odev), pg_net_id);
if (!x) {
/*slow path: we dont already have xfrm_state*/
x = xfrm_stateonly_find(pn->net, DUMMY_MARK,
(xfrm_address_t *)&pkt_dev->cur_daddr,
(xfrm_address_t *)&pkt_dev->cur_saddr,
AF_INET,
pkt_dev->ipsmode,
pkt_dev->ipsproto, 0);
if (pkt_dev->spi) {
/* We need as quick as possible to find the right SA
* Searching with minimum criteria to archieve this.
*/
x = xfrm_state_lookup_byspi(pn->net, htonl(pkt_dev->spi), AF_INET);
} else {
/* slow path: we dont already have xfrm_state */
x = xfrm_stateonly_find(pn->net, DUMMY_MARK,
(xfrm_address_t *)&pkt_dev->cur_daddr,
(xfrm_address_t *)&pkt_dev->cur_saddr,
AF_INET,
pkt_dev->ipsmode,
pkt_dev->ipsproto, 0);
}
if (x) {
pkt_dev->flows[flow].x = x;
set_pkt_overhead(pkt_dev);

22
net/xfrm/xfrm_state.c
View file

@ -915,6 +915,28 @@ xfrm_stateonly_find(struct net *net, u32 mark,
}
EXPORT_SYMBOL(xfrm_stateonly_find);
struct xfrm_state *xfrm_state_lookup_byspi(struct net *net, __be32 spi,
unsigned short family)
{
struct xfrm_state *x;
struct xfrm_state_walk *w;
spin_lock_bh(&net->xfrm.xfrm_state_lock);
list_for_each_entry(w, &net->xfrm.state_all, all) {
x = container_of(w, struct xfrm_state, km);
if (x->props.family != family ||
x->id.spi != spi)
continue;
spin_unlock_bh(&net->xfrm.xfrm_state_lock);
xfrm_state_hold(x);
return x;
}
spin_unlock_bh(&net->xfrm.xfrm_state_lock);
return NULL;
}
EXPORT_SYMBOL(xfrm_state_lookup_byspi);
static void __xfrm_state_insert(struct xfrm_state *x)
{
struct net *net = xs_net(x);