ia64/linux-2.6.18-xen.hg

view net/ipv6/xfrm6_state.c @ 673:3161879fdf22

[IA64] xencomm: support XENMEM_add_to_physmap and XENMEM_remove_from_phsymap

support XENMEM_add_to_physmap and XENMEM_remove_from_phsymap.

Signed-off-by: Isaku Yamahata <yamahata@valinux.co.jp>
author Isaku Yamahata <yamahata@valinux.co.jp>
date Tue Sep 16 21:26:15 2008 +0900 (2008-09-16)
parents 831230e53067
children
line source
1 /*
2 * xfrm6_state.c: based on xfrm4_state.c
3 *
4 * Authors:
5 * Mitsuru KANDA @USAGI
6 * Kazunori MIYAZAWA @USAGI
7 * Kunihiro Ishiguro <kunihiro@ipinfusion.com>
8 * IPv6 support
9 * YOSHIFUJI Hideaki @USAGI
10 * Split up af-specific portion
11 *
12 */
14 #include <net/xfrm.h>
15 #include <linux/pfkeyv2.h>
16 #include <linux/ipsec.h>
17 #include <net/ipv6.h>
18 #include <net/addrconf.h>
20 static struct xfrm_state_afinfo xfrm6_state_afinfo;
22 static void
23 __xfrm6_init_tempsel(struct xfrm_state *x, struct flowi *fl,
24 struct xfrm_tmpl *tmpl,
25 xfrm_address_t *daddr, xfrm_address_t *saddr)
26 {
27 /* Initialize temporary selector matching only
28 * to current session. */
29 ipv6_addr_copy((struct in6_addr *)&x->sel.daddr, &fl->fl6_dst);
30 ipv6_addr_copy((struct in6_addr *)&x->sel.saddr, &fl->fl6_src);
31 x->sel.dport = xfrm_flowi_dport(fl);
32 x->sel.dport_mask = ~0;
33 x->sel.sport = xfrm_flowi_sport(fl);
34 x->sel.sport_mask = ~0;
35 x->sel.prefixlen_d = 128;
36 x->sel.prefixlen_s = 128;
37 x->sel.proto = fl->proto;
38 x->sel.ifindex = fl->oif;
39 x->id = tmpl->id;
40 if (ipv6_addr_any((struct in6_addr*)&x->id.daddr))
41 memcpy(&x->id.daddr, daddr, sizeof(x->sel.daddr));
42 memcpy(&x->props.saddr, &tmpl->saddr, sizeof(x->props.saddr));
43 if (ipv6_addr_any((struct in6_addr*)&x->props.saddr))
44 memcpy(&x->props.saddr, saddr, sizeof(x->props.saddr));
45 if (tmpl->mode && ipv6_addr_any((struct in6_addr*)&x->props.saddr)) {
46 struct rt6_info *rt;
47 struct flowi fl_tunnel = {
48 .nl_u = {
49 .ip6_u = {
50 .daddr = *(struct in6_addr *)daddr,
51 }
52 }
53 };
54 if (!xfrm_dst_lookup((struct xfrm_dst **)&rt,
55 &fl_tunnel, AF_INET6)) {
56 ipv6_get_saddr(&rt->u.dst, (struct in6_addr *)daddr,
57 (struct in6_addr *)&x->props.saddr);
58 dst_release(&rt->u.dst);
59 }
60 }
61 x->props.mode = tmpl->mode;
62 x->props.reqid = tmpl->reqid;
63 x->props.family = AF_INET6;
64 }
66 static struct xfrm_state *
67 __xfrm6_state_lookup(xfrm_address_t *daddr, u32 spi, u8 proto)
68 {
69 unsigned h = __xfrm6_spi_hash(daddr, spi, proto);
70 struct xfrm_state *x;
72 list_for_each_entry(x, xfrm6_state_afinfo.state_byspi+h, byspi) {
73 if (x->props.family == AF_INET6 &&
74 spi == x->id.spi &&
75 ipv6_addr_equal((struct in6_addr *)daddr, (struct in6_addr *)x->id.daddr.a6) &&
76 proto == x->id.proto) {
77 xfrm_state_hold(x);
78 return x;
79 }
80 }
81 return NULL;
82 }
84 static struct xfrm_state *
85 __xfrm6_find_acq(u8 mode, u32 reqid, u8 proto,
86 xfrm_address_t *daddr, xfrm_address_t *saddr,
87 int create)
88 {
89 struct xfrm_state *x, *x0;
90 unsigned h = __xfrm6_dst_hash(daddr);
92 x0 = NULL;
94 list_for_each_entry(x, xfrm6_state_afinfo.state_bydst+h, bydst) {
95 if (x->props.family == AF_INET6 &&
96 ipv6_addr_equal((struct in6_addr *)daddr, (struct in6_addr *)x->id.daddr.a6) &&
97 mode == x->props.mode &&
98 proto == x->id.proto &&
99 ipv6_addr_equal((struct in6_addr *)saddr, (struct in6_addr *)x->props.saddr.a6) &&
100 reqid == x->props.reqid &&
101 x->km.state == XFRM_STATE_ACQ &&
102 !x->id.spi) {
103 x0 = x;
104 break;
105 }
106 }
107 if (!x0 && create && (x0 = xfrm_state_alloc()) != NULL) {
108 ipv6_addr_copy((struct in6_addr *)x0->sel.daddr.a6,
109 (struct in6_addr *)daddr);
110 ipv6_addr_copy((struct in6_addr *)x0->sel.saddr.a6,
111 (struct in6_addr *)saddr);
112 x0->sel.prefixlen_d = 128;
113 x0->sel.prefixlen_s = 128;
114 ipv6_addr_copy((struct in6_addr *)x0->props.saddr.a6,
115 (struct in6_addr *)saddr);
116 x0->km.state = XFRM_STATE_ACQ;
117 ipv6_addr_copy((struct in6_addr *)x0->id.daddr.a6,
118 (struct in6_addr *)daddr);
119 x0->id.proto = proto;
120 x0->props.family = AF_INET6;
121 x0->props.mode = mode;
122 x0->props.reqid = reqid;
123 x0->lft.hard_add_expires_seconds = XFRM_ACQ_EXPIRES;
124 xfrm_state_hold(x0);
125 x0->timer.expires = jiffies + XFRM_ACQ_EXPIRES*HZ;
126 add_timer(&x0->timer);
127 xfrm_state_hold(x0);
128 list_add_tail(&x0->bydst, xfrm6_state_afinfo.state_bydst+h);
129 wake_up(&km_waitq);
130 }
131 if (x0)
132 xfrm_state_hold(x0);
133 return x0;
134 }
136 static struct xfrm_state_afinfo xfrm6_state_afinfo = {
137 .family = AF_INET6,
138 .init_tempsel = __xfrm6_init_tempsel,
139 .state_lookup = __xfrm6_state_lookup,
140 .find_acq = __xfrm6_find_acq,
141 };
143 void __init xfrm6_state_init(void)
144 {
145 xfrm_state_register_afinfo(&xfrm6_state_afinfo);
146 }
148 void xfrm6_state_fini(void)
149 {
150 xfrm_state_unregister_afinfo(&xfrm6_state_afinfo);
151 }