[XFRM] STATE: Add source address list.
Support source address based searching.
Mobile IPv6 will use it.
Based on MIPL2 kernel patch.
Signed-off-by: Masahide NAKAMURA <nakam@linux-ipv6.org>
Signed-off-by: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/include/net/xfrm.h b/include/net/xfrm.h
index aa3be68..88145e3 100644
--- a/include/net/xfrm.h
+++ b/include/net/xfrm.h
@@ -95,6 +95,7 @@
{
/* Note: bydst is re-used during gc */
struct list_head bydst;
+ struct list_head bysrc;
struct list_head byspi;
atomic_t refcnt;
@@ -236,6 +237,7 @@
struct xfrm_state_afinfo {
unsigned short family;
struct list_head *state_bydst;
+ struct list_head *state_bysrc;
struct list_head *state_byspi;
int (*init_flags)(struct xfrm_state *x);
void (*init_tempsel)(struct xfrm_state *x, struct flowi *fl,
@@ -421,6 +423,30 @@
}
static __inline__
+unsigned __xfrm4_src_hash(xfrm_address_t *addr)
+{
+ return __xfrm4_dst_hash(addr);
+}
+
+static __inline__
+unsigned __xfrm6_src_hash(xfrm_address_t *addr)
+{
+ return __xfrm6_dst_hash(addr);
+}
+
+static __inline__
+unsigned xfrm_src_hash(xfrm_address_t *addr, unsigned short family)
+{
+ switch (family) {
+ case AF_INET:
+ return __xfrm4_src_hash(addr);
+ case AF_INET6:
+ return __xfrm6_src_hash(addr);
+ }
+ return 0;
+}
+
+static __inline__
unsigned __xfrm4_spi_hash(xfrm_address_t *addr, u32 spi, u8 proto)
{
unsigned h;
diff --git a/net/ipv4/xfrm4_state.c b/net/ipv4/xfrm4_state.c
index 97b0c75..c56b258 100644
--- a/net/ipv4/xfrm4_state.c
+++ b/net/ipv4/xfrm4_state.c
@@ -122,6 +122,9 @@
add_timer(&x0->timer);
xfrm_state_hold(x0);
list_add_tail(&x0->bydst, xfrm4_state_afinfo.state_bydst+h);
+ h = __xfrm4_src_hash(saddr);
+ xfrm_state_hold(x0);
+ list_add_tail(&x0->bysrc, xfrm4_state_afinfo.state_bysrc+h);
wake_up(&km_waitq);
}
if (x0)
diff --git a/net/ipv6/xfrm6_state.c b/net/ipv6/xfrm6_state.c
index a1a1f54..2fb0785 100644
--- a/net/ipv6/xfrm6_state.c
+++ b/net/ipv6/xfrm6_state.c
@@ -126,6 +126,9 @@
add_timer(&x0->timer);
xfrm_state_hold(x0);
list_add_tail(&x0->bydst, xfrm6_state_afinfo.state_bydst+h);
+ h = __xfrm6_src_hash(saddr);
+ xfrm_state_hold(x0);
+ list_add_tail(&x0->bysrc, xfrm6_state_afinfo.state_bysrc+h);
wake_up(&km_waitq);
}
if (x0)
diff --git a/net/xfrm/xfrm_state.c b/net/xfrm/xfrm_state.c
index 34c038c..2a99928 100644
--- a/net/xfrm/xfrm_state.c
+++ b/net/xfrm/xfrm_state.c
@@ -45,6 +45,7 @@
* Also, it can be used by ah/esp icmp error handler to find offending SA.
*/
static struct list_head xfrm_state_bydst[XFRM_DST_HSIZE];
+static struct list_head xfrm_state_bysrc[XFRM_DST_HSIZE];
static struct list_head xfrm_state_byspi[XFRM_DST_HSIZE];
DECLARE_WAIT_QUEUE_HEAD(km_waitq);
@@ -200,6 +201,7 @@
atomic_set(&x->refcnt, 1);
atomic_set(&x->tunnel_users, 0);
INIT_LIST_HEAD(&x->bydst);
+ INIT_LIST_HEAD(&x->bysrc);
INIT_LIST_HEAD(&x->byspi);
init_timer(&x->timer);
x->timer.function = xfrm_timer_handler;
@@ -240,6 +242,8 @@
spin_lock(&xfrm_state_lock);
list_del(&x->bydst);
__xfrm_state_put(x);
+ list_del(&x->bysrc);
+ __xfrm_state_put(x);
if (x->id.spi) {
list_del(&x->byspi);
__xfrm_state_put(x);
@@ -415,6 +419,8 @@
x->km.state = XFRM_STATE_ACQ;
list_add_tail(&x->bydst, xfrm_state_bydst+h);
xfrm_state_hold(x);
+ list_add_tail(&x->bysrc, xfrm_state_bysrc+h);
+ xfrm_state_hold(x);
if (x->id.spi) {
h = xfrm_spi_hash(&x->id.daddr, x->id.spi, x->id.proto, family);
list_add(&x->byspi, xfrm_state_byspi+h);
@@ -448,11 +454,19 @@
list_add(&x->bydst, xfrm_state_bydst+h);
xfrm_state_hold(x);
- h = xfrm_spi_hash(&x->id.daddr, x->id.spi, x->id.proto, x->props.family);
+ h = xfrm_src_hash(&x->props.saddr, x->props.family);
- list_add(&x->byspi, xfrm_state_byspi+h);
+ list_add(&x->bysrc, xfrm_state_bysrc+h);
xfrm_state_hold(x);
+ if (xfrm_id_proto_match(x->id.proto, IPSEC_PROTO_ANY)) {
+ h = xfrm_spi_hash(&x->id.daddr, x->id.spi, x->id.proto,
+ x->props.family);
+
+ list_add(&x->byspi, xfrm_state_byspi+h);
+ xfrm_state_hold(x);
+ }
+
if (!mod_timer(&x->timer, jiffies + HZ))
xfrm_state_hold(x);
@@ -1075,6 +1089,7 @@
err = -ENOBUFS;
else {
afinfo->state_bydst = xfrm_state_bydst;
+ afinfo->state_bysrc = xfrm_state_bysrc;
afinfo->state_byspi = xfrm_state_byspi;
xfrm_state_afinfo[afinfo->family] = afinfo;
}
@@ -1097,6 +1112,7 @@
else {
xfrm_state_afinfo[afinfo->family] = NULL;
afinfo->state_byspi = NULL;
+ afinfo->state_bysrc = NULL;
afinfo->state_bydst = NULL;
}
}
@@ -1218,6 +1234,7 @@
for (i=0; i<XFRM_DST_HSIZE; i++) {
INIT_LIST_HEAD(&xfrm_state_bydst[i]);
+ INIT_LIST_HEAD(&xfrm_state_bysrc[i]);
INIT_LIST_HEAD(&xfrm_state_byspi[i]);
}
INIT_WORK(&xfrm_state_gc_work, xfrm_state_gc_task, NULL);