[XFRM]: Pull xfrm_state_bydst hash table knowledge out of afinfo.
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/xfrm/xfrm_state.c b/net/xfrm/xfrm_state.c
index 622e92a..80f5f9d 100644
--- a/net/xfrm/xfrm_state.c
+++ b/net/xfrm/xfrm_state.c
@@ -48,6 +48,18 @@
static struct list_head xfrm_state_bysrc[XFRM_DST_HSIZE];
static struct list_head xfrm_state_byspi[XFRM_DST_HSIZE];
+static __inline__
+unsigned xfrm_dst_hash(xfrm_address_t *addr, unsigned short family)
+{
+ switch (family) {
+ case AF_INET:
+ return __xfrm4_dst_hash(addr);
+ case AF_INET6:
+ return __xfrm6_dst_hash(addr);
+ }
+ return 0;
+}
+
DECLARE_WAIT_QUEUE_HEAD(km_waitq);
EXPORT_SYMBOL(km_waitq);
@@ -489,6 +501,89 @@
}
EXPORT_SYMBOL(xfrm_state_insert);
+/* xfrm_state_lock is held */
+static struct xfrm_state *__find_acq_core(unsigned short family, u8 mode, u32 reqid, u8 proto, xfrm_address_t *daddr, xfrm_address_t *saddr, int create)
+{
+ unsigned int h = xfrm_dst_hash(daddr, family);
+ struct xfrm_state *x;
+
+ list_for_each_entry(x, xfrm_state_bydst+h, bydst) {
+ if (x->props.reqid != reqid ||
+ x->props.mode != mode ||
+ x->props.family != family ||
+ x->km.state != XFRM_STATE_ACQ ||
+ x->id.spi != 0)
+ continue;
+
+ switch (family) {
+ case AF_INET:
+ if (x->id.daddr.a4 != daddr->a4 ||
+ x->props.saddr.a4 != saddr->a4)
+ continue;
+ break;
+ case AF_INET6:
+ if (!ipv6_addr_equal((struct in6_addr *)x->id.daddr.a6,
+ (struct in6_addr *)daddr) ||
+ !ipv6_addr_equal((struct in6_addr *)
+ x->props.saddr.a6,
+ (struct in6_addr *)saddr))
+ continue;
+ break;
+ };
+
+ xfrm_state_hold(x);
+ return x;
+ }
+
+ if (!create)
+ return NULL;
+
+ x = xfrm_state_alloc();
+ if (likely(x)) {
+ switch (family) {
+ case AF_INET:
+ x->sel.daddr.a4 = daddr->a4;
+ x->sel.saddr.a4 = saddr->a4;
+ x->sel.prefixlen_d = 32;
+ x->sel.prefixlen_s = 32;
+ x->props.saddr.a4 = saddr->a4;
+ x->id.daddr.a4 = daddr->a4;
+ break;
+
+ case AF_INET6:
+ ipv6_addr_copy((struct in6_addr *)x->sel.daddr.a6,
+ (struct in6_addr *)daddr);
+ ipv6_addr_copy((struct in6_addr *)x->sel.saddr.a6,
+ (struct in6_addr *)saddr);
+ x->sel.prefixlen_d = 128;
+ x->sel.prefixlen_s = 128;
+ ipv6_addr_copy((struct in6_addr *)x->props.saddr.a6,
+ (struct in6_addr *)saddr);
+ ipv6_addr_copy((struct in6_addr *)x->id.daddr.a6,
+ (struct in6_addr *)daddr);
+ break;
+ };
+
+ x->km.state = XFRM_STATE_ACQ;
+ x->id.proto = proto;
+ x->props.family = family;
+ x->props.mode = mode;
+ x->props.reqid = reqid;
+ x->lft.hard_add_expires_seconds = XFRM_ACQ_EXPIRES;
+ xfrm_state_hold(x);
+ x->timer.expires = jiffies + XFRM_ACQ_EXPIRES*HZ;
+ add_timer(&x->timer);
+ xfrm_state_hold(x);
+ list_add_tail(&x->bydst, xfrm_state_bydst+h);
+ h = xfrm_src_hash(saddr, family);
+ xfrm_state_hold(x);
+ list_add_tail(&x->bysrc, xfrm_state_bysrc+h);
+ wake_up(&km_waitq);
+ }
+
+ return x;
+}
+
static inline struct xfrm_state *
__xfrm_state_locate(struct xfrm_state_afinfo *afinfo, struct xfrm_state *x,
int use_spi)
@@ -533,9 +628,9 @@
}
if (use_spi && !x1)
- x1 = afinfo->find_acq(
- x->props.mode, x->props.reqid, x->id.proto,
- &x->id.daddr, &x->props.saddr, 0);
+ x1 = __find_acq_core(family, x->props.mode, x->props.reqid,
+ x->id.proto,
+ &x->id.daddr, &x->props.saddr, 0);
__xfrm_state_insert(x);
err = 0;
@@ -716,14 +811,11 @@
int create, unsigned short family)
{
struct xfrm_state *x;
- struct xfrm_state_afinfo *afinfo = xfrm_state_get_afinfo(family);
- if (!afinfo)
- return NULL;
spin_lock_bh(&xfrm_state_lock);
- x = afinfo->find_acq(mode, reqid, proto, daddr, saddr, create);
+ x = __find_acq_core(family, mode, reqid, proto, daddr, saddr, create);
spin_unlock_bh(&xfrm_state_lock);
- xfrm_state_put_afinfo(afinfo);
+
return x;
}
EXPORT_SYMBOL(xfrm_find_acq);
@@ -1181,7 +1273,6 @@
if (unlikely(xfrm_state_afinfo[afinfo->family] != NULL))
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;
@@ -1206,7 +1297,6 @@
xfrm_state_afinfo[afinfo->family] = NULL;
afinfo->state_byspi = NULL;
afinfo->state_bysrc = NULL;
- afinfo->state_bydst = NULL;
}
}
write_unlock_bh(&xfrm_state_afinfo_lock);