XFRM_MSG_REPORT,
#define XFRM_MSG_REPORT XFRM_MSG_REPORT
+ XFRM_MSG_MIGRATE,
+#define XFRM_MSG_MIGRATE XFRM_MSG_MIGRATE
+
__XFRM_MSG_MAX
};
#define XFRM_MSG_MAX (__XFRM_MSG_MAX - 1)
XFRMA_COADDR, /* xfrm_address_t */
XFRMA_LASTUSED,
XFRMA_POLICY_TYPE, /* struct xfrm_userpolicy_type */
+ XFRMA_MIGRATE,
__XFRMA_MAX
#define XFRMA_MAX (__XFRMA_MAX - 1)
struct xfrm_selector sel;
};
+struct xfrm_user_migrate {
+ xfrm_address_t old_daddr;
+ xfrm_address_t old_saddr;
+ xfrm_address_t new_daddr;
+ xfrm_address_t new_saddr;
+ __u8 proto;
+ __u8 mode;
+ __u16 reserved;
+ __u32 reqid;
+ __u16 old_family;
+ __u16 new_family;
+};
+
#ifndef __KERNEL__
/* backwards compatibility for userspace */
#define XFRMGRP_ACQUIRE 1
#define XFRMNLGRP_AEVENTS XFRMNLGRP_AEVENTS
XFRMNLGRP_REPORT,
#define XFRMNLGRP_REPORT XFRMNLGRP_REPORT
+ XFRMNLGRP_MIGRATE,
+#define XFRMNLGRP_MIGRATE XFRMNLGRP_MIGRATE
__XFRMNLGRP_MAX
};
#define XFRMNLGRP_MAX (__XFRMNLGRP_MAX - 1)
struct xfrm_tmpl xfrm_vec[XFRM_MAX_DEPTH];
};
+struct xfrm_migrate {
+ xfrm_address_t old_daddr;
+ xfrm_address_t old_saddr;
+ xfrm_address_t new_daddr;
+ xfrm_address_t new_saddr;
+ u8 proto;
+ u8 mode;
+ u16 reserved;
+ u32 reqid;
+ u16 old_family;
+ u16 new_family;
+};
+
#define XFRM_KM_TIMEOUT 30
/* which seqno */
#define XFRM_REPLAY_SEQ 1
int (*new_mapping)(struct xfrm_state *x, xfrm_address_t *ipaddr, __be16 sport);
int (*notify_policy)(struct xfrm_policy *x, int dir, struct km_event *c);
int (*report)(u8 proto, struct xfrm_selector *sel, xfrm_address_t *addr);
+ int (*migrate)(struct xfrm_selector *sel, u8 dir, u8 type, struct xfrm_migrate *m, int num_bundles);
};
extern int xfrm_register_km(struct xfrm_mgr *km);
struct flowi *fl, int family, int strict);
extern void xfrm_init_pmtu(struct dst_entry *dst);
+#ifdef CONFIG_XFRM_MIGRATE
+extern int km_migrate(struct xfrm_selector *sel, u8 dir, u8 type,
+ struct xfrm_migrate *m, int num_bundles);
+extern struct xfrm_state * xfrm_migrate_state_find(struct xfrm_migrate *m);
+extern struct xfrm_state * xfrm_state_migrate(struct xfrm_state *x,
+ struct xfrm_migrate *m);
+extern int xfrm_migrate(struct xfrm_selector *sel, u8 dir, u8 type,
+ struct xfrm_migrate *m, int num_bundles);
+#endif
+
extern wait_queue_head_t km_waitq;
extern int km_new_mapping(struct xfrm_state *x, xfrm_address_t *ipaddr, __be16 sport);
extern void km_policy_expired(struct xfrm_policy *pol, int dir, int hard, u32 pid);
xfrm_replay_notify(x, XFRM_REPLAY_UPDATE);
}
+#ifdef CONFIG_XFRM_MIGRATE
+static inline struct xfrm_algo *xfrm_algo_clone(struct xfrm_algo *orig)
+{
+ return (struct xfrm_algo *)kmemdup(orig, sizeof(*orig) + orig->alg_key_len, GFP_KERNEL);
+}
+
+static inline void xfrm_states_put(struct xfrm_state **states, int n)
+{
+ int i;
+ for (i = 0; i < n; i++)
+ xfrm_state_put(*(states + i));
+}
+
+static inline void xfrm_states_delete(struct xfrm_state **states, int n)
+{
+ int i;
+ for (i = 0; i < n; i++)
+ xfrm_state_delete(*(states + i));
+}
+#endif
#endif /* _NET_XFRM_H */
xfrm_input_init();
}
+#ifdef CONFIG_XFRM_MIGRATE
+static int xfrm_migrate_selector_match(struct xfrm_selector *sel_cmp,
+ struct xfrm_selector *sel_tgt)
+{
+ if (sel_cmp->proto == IPSEC_ULPROTO_ANY) {
+ if (sel_tgt->family == sel_cmp->family &&
+ xfrm_addr_cmp(&sel_tgt->daddr, &sel_cmp->daddr,
+ sel_cmp->family) == 0 &&
+ xfrm_addr_cmp(&sel_tgt->saddr, &sel_cmp->saddr,
+ sel_cmp->family) == 0 &&
+ sel_tgt->prefixlen_d == sel_cmp->prefixlen_d &&
+ sel_tgt->prefixlen_s == sel_cmp->prefixlen_s) {
+ return 1;
+ }
+ } else {
+ if (memcmp(sel_tgt, sel_cmp, sizeof(*sel_tgt)) == 0) {
+ return 1;
+ }
+ }
+ return 0;
+}
+
+static struct xfrm_policy * xfrm_migrate_policy_find(struct xfrm_selector *sel,
+ u8 dir, u8 type)
+{
+ struct xfrm_policy *pol, *ret = NULL;
+ struct hlist_node *entry;
+ struct hlist_head *chain;
+ u32 priority = ~0U;
+
+ read_lock_bh(&xfrm_policy_lock);
+ chain = policy_hash_direct(&sel->daddr, &sel->saddr, sel->family, dir);
+ hlist_for_each_entry(pol, entry, chain, bydst) {
+ if (xfrm_migrate_selector_match(sel, &pol->selector) &&
+ pol->type == type) {
+ ret = pol;
+ priority = ret->priority;
+ break;
+ }
+ }
+ chain = &xfrm_policy_inexact[dir];
+ hlist_for_each_entry(pol, entry, chain, bydst) {
+ if (xfrm_migrate_selector_match(sel, &pol->selector) &&
+ pol->type == type &&
+ pol->priority < priority) {
+ ret = pol;
+ break;
+ }
+ }
+
+ if (ret)
+ xfrm_pol_hold(ret);
+
+ read_unlock_bh(&xfrm_policy_lock);
+
+ return ret;
+}
+
+static int migrate_tmpl_match(struct xfrm_migrate *m, struct xfrm_tmpl *t)
+{
+ int match = 0;
+
+ if (t->mode == m->mode && t->id.proto == m->proto &&
+ (m->reqid == 0 || t->reqid == m->reqid)) {
+ switch (t->mode) {
+ case XFRM_MODE_TUNNEL:
+ case XFRM_MODE_BEET:
+ if (xfrm_addr_cmp(&t->id.daddr, &m->old_daddr,
+ m->old_family) == 0 &&
+ xfrm_addr_cmp(&t->saddr, &m->old_saddr,
+ m->old_family) == 0) {
+ match = 1;
+ }
+ break;
+ case XFRM_MODE_TRANSPORT:
+ /* in case of transport mode, template does not store
+ any IP addresses, hence we just compare mode and
+ protocol */
+ match = 1;
+ break;
+ default:
+ break;
+ }
+ }
+ return match;
+}
+
+/* update endpoint address(es) of template(s) */
+static int xfrm_policy_migrate(struct xfrm_policy *pol,
+ struct xfrm_migrate *m, int num_migrate)
+{
+ struct xfrm_migrate *mp;
+ struct dst_entry *dst;
+ int i, j, n = 0;
+
+ write_lock_bh(&pol->lock);
+ if (unlikely(pol->dead)) {
+ /* target policy has been deleted */
+ write_unlock_bh(&pol->lock);
+ return -ENOENT;
+ }
+
+ for (i = 0; i < pol->xfrm_nr; i++) {
+ for (j = 0, mp = m; j < num_migrate; j++, mp++) {
+ if (!migrate_tmpl_match(mp, &pol->xfrm_vec[i]))
+ continue;
+ n++;
+ if (pol->xfrm_vec[i].mode != XFRM_MODE_TUNNEL)
+ continue;
+ /* update endpoints */
+ memcpy(&pol->xfrm_vec[i].id.daddr, &mp->new_daddr,
+ sizeof(pol->xfrm_vec[i].id.daddr));
+ memcpy(&pol->xfrm_vec[i].saddr, &mp->new_saddr,
+ sizeof(pol->xfrm_vec[i].saddr));
+ pol->xfrm_vec[i].encap_family = mp->new_family;
+ /* flush bundles */
+ while ((dst = pol->bundles) != NULL) {
+ pol->bundles = dst->next;
+ dst_free(dst);
+ }
+ }
+ }
+
+ write_unlock_bh(&pol->lock);
+
+ if (!n)
+ return -ENODATA;
+
+ return 0;
+}
+
+static int xfrm_migrate_check(struct xfrm_migrate *m, int num_migrate)
+{
+ int i, j;
+
+ if (num_migrate < 1 || num_migrate > XFRM_MAX_DEPTH)
+ return -EINVAL;
+
+ for (i = 0; i < num_migrate; i++) {
+ if ((xfrm_addr_cmp(&m[i].old_daddr, &m[i].new_daddr,
+ m[i].old_family) == 0) &&
+ (xfrm_addr_cmp(&m[i].old_saddr, &m[i].new_saddr,
+ m[i].old_family) == 0))
+ return -EINVAL;
+ if (xfrm_addr_any(&m[i].new_daddr, m[i].new_family) ||
+ xfrm_addr_any(&m[i].new_saddr, m[i].new_family))
+ return -EINVAL;
+
+ /* check if there is any duplicated entry */
+ for (j = i + 1; j < num_migrate; j++) {
+ if (!memcmp(&m[i].old_daddr, &m[j].old_daddr,
+ sizeof(m[i].old_daddr)) &&
+ !memcmp(&m[i].old_saddr, &m[j].old_saddr,
+ sizeof(m[i].old_saddr)) &&
+ m[i].proto == m[j].proto &&
+ m[i].mode == m[j].mode &&
+ m[i].reqid == m[j].reqid &&
+ m[i].old_family == m[j].old_family)
+ return -EINVAL;
+ }
+ }
+
+ return 0;
+}
+
+int xfrm_migrate(struct xfrm_selector *sel, u8 dir, u8 type,
+ struct xfrm_migrate *m, int num_migrate)
+{
+ int i, err, nx_cur = 0, nx_new = 0;
+ struct xfrm_policy *pol = NULL;
+ struct xfrm_state *x, *xc;
+ struct xfrm_state *x_cur[XFRM_MAX_DEPTH];
+ struct xfrm_state *x_new[XFRM_MAX_DEPTH];
+ struct xfrm_migrate *mp;
+
+ if ((err = xfrm_migrate_check(m, num_migrate)) < 0)
+ goto out;
+
+ /* Stage 1 - find policy */
+ if ((pol = xfrm_migrate_policy_find(sel, dir, type)) == NULL) {
+ err = -ENOENT;
+ goto out;
+ }
+
+ /* Stage 2 - find and update state(s) */
+ for (i = 0, mp = m; i < num_migrate; i++, mp++) {
+ if ((x = xfrm_migrate_state_find(mp))) {
+ x_cur[nx_cur] = x;
+ nx_cur++;
+ if ((xc = xfrm_state_migrate(x, mp))) {
+ x_new[nx_new] = xc;
+ nx_new++;
+ } else {
+ err = -ENODATA;
+ goto restore_state;
+ }
+ }
+ }
+
+ /* Stage 3 - update policy */
+ if ((err = xfrm_policy_migrate(pol, m, num_migrate)) < 0)
+ goto restore_state;
+
+ /* Stage 4 - delete old state(s) */
+ if (nx_cur) {
+ xfrm_states_put(x_cur, nx_cur);
+ xfrm_states_delete(x_cur, nx_cur);
+ }
+
+ /* Stage 5 - announce */
+ km_migrate(sel, dir, type, m, num_migrate);
+
+ xfrm_pol_put(pol);
+
+ return 0;
+out:
+ return err;
+
+restore_state:
+ if (pol)
+ xfrm_pol_put(pol);
+ if (nx_cur)
+ xfrm_states_put(x_cur, nx_cur);
+ if (nx_new)
+ xfrm_states_delete(x_new, nx_new);
+
+ return err;
+}
+#endif
+
}
EXPORT_SYMBOL(xfrm_state_add);
+#ifdef CONFIG_XFRM_MIGRATE
+struct xfrm_state *xfrm_state_clone(struct xfrm_state *orig, int *errp)
+{
+ int err = -ENOMEM;
+ struct xfrm_state *x = xfrm_state_alloc();
+ if (!x)
+ goto error;
+
+ memcpy(&x->id, &orig->id, sizeof(x->id));
+ memcpy(&x->sel, &orig->sel, sizeof(x->sel));
+ memcpy(&x->lft, &orig->lft, sizeof(x->lft));
+ x->props.mode = orig->props.mode;
+ x->props.replay_window = orig->props.replay_window;
+ x->props.reqid = orig->props.reqid;
+ x->props.family = orig->props.family;
+ x->props.saddr = orig->props.saddr;
+
+ if (orig->aalg) {
+ x->aalg = xfrm_algo_clone(orig->aalg);
+ if (!x->aalg)
+ goto error;
+ }
+ x->props.aalgo = orig->props.aalgo;
+
+ if (orig->ealg) {
+ x->ealg = xfrm_algo_clone(orig->ealg);
+ if (!x->ealg)
+ goto error;
+ }
+ x->props.ealgo = orig->props.ealgo;
+
+ if (orig->calg) {
+ x->calg = xfrm_algo_clone(orig->calg);
+ if (!x->calg)
+ goto error;
+ }
+ x->props.calgo = orig->props.calgo;
+
+ if (orig->encap) {
+ x->encap = kmemdup(orig->encap, sizeof(*x->encap), GFP_KERNEL);
+ if (!x->encap)
+ goto error;
+ }
+
+ if (orig->coaddr) {
+ x->coaddr = kmemdup(orig->coaddr, sizeof(*x->coaddr),
+ GFP_KERNEL);
+ if (!x->coaddr)
+ goto error;
+ }
+
+ err = xfrm_init_state(x);
+ if (err)
+ goto error;
+
+ x->props.flags = orig->props.flags;
+
+ x->curlft.add_time = orig->curlft.add_time;
+ x->km.state = orig->km.state;
+ x->km.seq = orig->km.seq;
+
+ return x;
+
+ error:
+ if (errp)
+ *errp = err;
+ if (x) {
+ kfree(x->aalg);
+ kfree(x->ealg);
+ kfree(x->calg);
+ kfree(x->encap);
+ kfree(x->coaddr);
+ }
+ kfree(x);
+ return NULL;
+}
+EXPORT_SYMBOL(xfrm_state_clone);
+
+/* xfrm_state_lock is held */
+struct xfrm_state * xfrm_migrate_state_find(struct xfrm_migrate *m)
+{
+ unsigned int h;
+ struct xfrm_state *x;
+ struct hlist_node *entry;
+
+ if (m->reqid) {
+ h = xfrm_dst_hash(&m->old_daddr, &m->old_saddr,
+ m->reqid, m->old_family);
+ hlist_for_each_entry(x, entry, xfrm_state_bydst+h, bydst) {
+ if (x->props.mode != m->mode ||
+ x->id.proto != m->proto)
+ continue;
+ if (m->reqid && x->props.reqid != m->reqid)
+ continue;
+ if (xfrm_addr_cmp(&x->id.daddr, &m->old_daddr,
+ m->old_family) ||
+ xfrm_addr_cmp(&x->props.saddr, &m->old_saddr,
+ m->old_family))
+ continue;
+ xfrm_state_hold(x);
+ return x;
+ }
+ } else {
+ h = xfrm_src_hash(&m->old_daddr, &m->old_saddr,
+ m->old_family);
+ hlist_for_each_entry(x, entry, xfrm_state_bysrc+h, bysrc) {
+ if (x->props.mode != m->mode ||
+ x->id.proto != m->proto)
+ continue;
+ if (xfrm_addr_cmp(&x->id.daddr, &m->old_daddr,
+ m->old_family) ||
+ xfrm_addr_cmp(&x->props.saddr, &m->old_saddr,
+ m->old_family))
+ continue;
+ xfrm_state_hold(x);
+ return x;
+ }
+ }
+
+ return NULL;
+}
+EXPORT_SYMBOL(xfrm_migrate_state_find);
+
+struct xfrm_state * xfrm_state_migrate(struct xfrm_state *x,
+ struct xfrm_migrate *m)
+{
+ struct xfrm_state *xc;
+ int err;
+
+ xc = xfrm_state_clone(x, &err);
+ if (!xc)
+ return NULL;
+
+ memcpy(&xc->id.daddr, &m->new_daddr, sizeof(xc->id.daddr));
+ memcpy(&xc->props.saddr, &m->new_saddr, sizeof(xc->props.saddr));
+
+ /* add state */
+ if (!xfrm_addr_cmp(&x->id.daddr, &m->new_daddr, m->new_family)) {
+ /* a care is needed when the destination address of the
+ state is to be updated as it is a part of triplet */
+ xfrm_state_insert(xc);
+ } else {
+ if ((err = xfrm_state_add(xc)) < 0)
+ goto error;
+ }
+
+ return xc;
+error:
+ kfree(xc);
+ return NULL;
+}
+EXPORT_SYMBOL(xfrm_state_migrate);
+#endif
+
int xfrm_state_update(struct xfrm_state *x)
{
struct xfrm_state *x1;
}
EXPORT_SYMBOL(km_policy_expired);
+int km_migrate(struct xfrm_selector *sel, u8 dir, u8 type,
+ struct xfrm_migrate *m, int num_migrate)
+{
+ int err = -EINVAL;
+ int ret;
+ struct xfrm_mgr *km;
+
+ read_lock(&xfrm_km_lock);
+ list_for_each_entry(km, &xfrm_km_list, list) {
+ if (km->migrate) {
+ ret = km->migrate(sel, dir, type, m, num_migrate);
+ if (!ret)
+ err = ret;
+ }
+ }
+ read_unlock(&xfrm_km_lock);
+ return err;
+}
+EXPORT_SYMBOL(km_migrate);
+
int km_report(u8 proto, struct xfrm_selector *sel, xfrm_address_t *addr)
{
int err = -EINVAL;
projects / linux-beck.git / commitdiff