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);
xfrm_address_t *daddr, xfrm_address_t *saddr);
struct xfrm_state *(*state_lookup)(xfrm_address_t *daddr, u32 spi, u8 proto);
struct xfrm_state *(*state_lookup_byaddr)(xfrm_address_t *daddr, xfrm_address_t *saddr, u8 proto);
- struct xfrm_state *(*find_acq)(u8 mode, u32 reqid, u8 proto,
- xfrm_address_t *daddr, xfrm_address_t *saddr,
- int create);
int (*tmpl_sort)(struct xfrm_tmpl **dst, struct xfrm_tmpl **src, int n);
int (*state_sort)(struct xfrm_state **dst, struct xfrm_state **src, int n);
};
}
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;
-}
-
-static __inline__
unsigned __xfrm4_src_hash(xfrm_address_t *addr)
{
return __xfrm4_dst_hash(addr);
return NULL;
}
-static struct xfrm_state *
-__xfrm4_find_acq(u8 mode, u32 reqid, u8 proto,
- xfrm_address_t *daddr, xfrm_address_t *saddr,
- int create)
-{
- struct xfrm_state *x, *x0;
- unsigned h = __xfrm4_dst_hash(daddr);
-
- x0 = NULL;
-
- list_for_each_entry(x, xfrm4_state_afinfo.state_bydst+h, bydst) {
- if (x->props.family == AF_INET &&
- daddr->a4 == x->id.daddr.a4 &&
- mode == x->props.mode &&
- proto == x->id.proto &&
- saddr->a4 == x->props.saddr.a4 &&
- reqid == x->props.reqid &&
- x->km.state == XFRM_STATE_ACQ &&
- !x->id.spi) {
- x0 = x;
- break;
- }
- }
- if (!x0 && create && (x0 = xfrm_state_alloc()) != NULL) {
- x0->sel.daddr.a4 = daddr->a4;
- x0->sel.saddr.a4 = saddr->a4;
- x0->sel.prefixlen_d = 32;
- x0->sel.prefixlen_s = 32;
- x0->props.saddr.a4 = saddr->a4;
- x0->km.state = XFRM_STATE_ACQ;
- x0->id.daddr.a4 = daddr->a4;
- x0->id.proto = proto;
- x0->props.family = AF_INET;
- x0->props.mode = mode;
- x0->props.reqid = reqid;
- x0->props.family = AF_INET;
- x0->lft.hard_add_expires_seconds = XFRM_ACQ_EXPIRES;
- xfrm_state_hold(x0);
- x0->timer.expires = jiffies + XFRM_ACQ_EXPIRES*HZ;
- 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)
- xfrm_state_hold(x0);
- return x0;
-}
-
static struct xfrm_state_afinfo xfrm4_state_afinfo = {
.family = AF_INET,
.init_flags = xfrm4_init_flags,
.init_tempsel = __xfrm4_init_tempsel,
.state_lookup = __xfrm4_state_lookup,
.state_lookup_byaddr = __xfrm4_state_lookup_byaddr,
- .find_acq = __xfrm4_find_acq,
};
void __init xfrm4_state_init(void)
return NULL;
}
-static struct xfrm_state *
-__xfrm6_find_acq(u8 mode, u32 reqid, u8 proto,
- xfrm_address_t *daddr, xfrm_address_t *saddr,
- int create)
-{
- struct xfrm_state *x, *x0;
- unsigned h = __xfrm6_dst_hash(daddr);
-
- x0 = NULL;
-
- list_for_each_entry(x, xfrm6_state_afinfo.state_bydst+h, bydst) {
- if (x->props.family == AF_INET6 &&
- ipv6_addr_equal((struct in6_addr *)daddr, (struct in6_addr *)x->id.daddr.a6) &&
- mode == x->props.mode &&
- proto == x->id.proto &&
- ipv6_addr_equal((struct in6_addr *)saddr, (struct in6_addr *)x->props.saddr.a6) &&
- reqid == x->props.reqid &&
- x->km.state == XFRM_STATE_ACQ &&
- !x->id.spi) {
- x0 = x;
- break;
- }
- }
- if (!x0 && create && (x0 = xfrm_state_alloc()) != NULL) {
- ipv6_addr_copy((struct in6_addr *)x0->sel.daddr.a6,
- (struct in6_addr *)daddr);
- ipv6_addr_copy((struct in6_addr *)x0->sel.saddr.a6,
- (struct in6_addr *)saddr);
- x0->sel.prefixlen_d = 128;
- x0->sel.prefixlen_s = 128;
- ipv6_addr_copy((struct in6_addr *)x0->props.saddr.a6,
- (struct in6_addr *)saddr);
- x0->km.state = XFRM_STATE_ACQ;
- ipv6_addr_copy((struct in6_addr *)x0->id.daddr.a6,
- (struct in6_addr *)daddr);
- x0->id.proto = proto;
- x0->props.family = AF_INET6;
- x0->props.mode = mode;
- x0->props.reqid = reqid;
- x0->lft.hard_add_expires_seconds = XFRM_ACQ_EXPIRES;
- xfrm_state_hold(x0);
- x0->timer.expires = jiffies + XFRM_ACQ_EXPIRES*HZ;
- 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)
- xfrm_state_hold(x0);
- return x0;
-}
-
static int
__xfrm6_state_sort(struct xfrm_state **dst, struct xfrm_state **src, int n)
{
.init_tempsel = __xfrm6_init_tempsel,
.state_lookup = __xfrm6_state_lookup,
.state_lookup_byaddr = __xfrm6_state_lookup_byaddr,
- .find_acq = __xfrm6_find_acq,
.tmpl_sort = __xfrm6_tmpl_sort,
.state_sort = __xfrm6_state_sort,
};
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);
}
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)
}
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;
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);
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;
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);