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-rw-r--r--net/xfrm/xfrm_user.c173
1 files changed, 173 insertions, 0 deletions
diff --git a/net/xfrm/xfrm_user.c b/net/xfrm/xfrm_user.c
index 82f36d396fca..079a5d315759 100644
--- a/net/xfrm/xfrm_user.c
+++ b/net/xfrm/xfrm_user.c
@@ -1632,6 +1632,176 @@ static int xfrm_add_acquire(struct sk_buff *skb, struct nlmsghdr *nlh,
return 0;
}
+#ifdef CONFIG_XFRM_MIGRATE
+static int verify_user_migrate(struct rtattr **xfrma)
+{
+ struct rtattr *rt = xfrma[XFRMA_MIGRATE-1];
+ struct xfrm_user_migrate *um;
+
+ if (!rt)
+ return -EINVAL;
+
+ if ((rt->rta_len - sizeof(*rt)) < sizeof(*um))
+ return -EINVAL;
+
+ return 0;
+}
+
+static int copy_from_user_migrate(struct xfrm_migrate *ma,
+ struct rtattr **xfrma, int *num)
+{
+ struct rtattr *rt = xfrma[XFRMA_MIGRATE-1];
+ struct xfrm_user_migrate *um;
+ int i, num_migrate;
+
+ um = RTA_DATA(rt);
+ num_migrate = (rt->rta_len - sizeof(*rt)) / sizeof(*um);
+
+ if (num_migrate <= 0 || num_migrate > XFRM_MAX_DEPTH)
+ return -EINVAL;
+
+ for (i = 0; i < num_migrate; i++, um++, ma++) {
+ memcpy(&ma->old_daddr, &um->old_daddr, sizeof(ma->old_daddr));
+ memcpy(&ma->old_saddr, &um->old_saddr, sizeof(ma->old_saddr));
+ memcpy(&ma->new_daddr, &um->new_daddr, sizeof(ma->new_daddr));
+ memcpy(&ma->new_saddr, &um->new_saddr, sizeof(ma->new_saddr));
+
+ ma->proto = um->proto;
+ ma->mode = um->mode;
+ ma->reqid = um->reqid;
+
+ ma->old_family = um->old_family;
+ ma->new_family = um->new_family;
+ }
+
+ *num = i;
+ return 0;
+}
+
+static int xfrm_do_migrate(struct sk_buff *skb, struct nlmsghdr *nlh,
+ struct rtattr **xfrma)
+{
+ struct xfrm_userpolicy_id *pi = NLMSG_DATA(nlh);
+ struct xfrm_migrate m[XFRM_MAX_DEPTH];
+ u8 type;
+ int err;
+ int n = 0;
+
+ err = verify_user_migrate((struct rtattr **)xfrma);
+ if (err)
+ return err;
+
+ err = copy_from_user_policy_type(&type, (struct rtattr **)xfrma);
+ if (err)
+ return err;
+
+ err = copy_from_user_migrate((struct xfrm_migrate *)m,
+ (struct rtattr **)xfrma, &n);
+ if (err)
+ return err;
+
+ if (!n)
+ return 0;
+
+ xfrm_migrate(&pi->sel, pi->dir, type, m, n);
+
+ return 0;
+}
+#else
+static int xfrm_do_migrate(struct sk_buff *skb, struct nlmsghdr *nlh,
+ struct rtattr **xfrma)
+{
+ return -ENOPROTOOPT;
+}
+#endif
+
+#ifdef CONFIG_XFRM_MIGRATE
+static int copy_to_user_migrate(struct xfrm_migrate *m, struct sk_buff *skb)
+{
+ struct xfrm_user_migrate um;
+
+ memset(&um, 0, sizeof(um));
+ um.proto = m->proto;
+ um.mode = m->mode;
+ um.reqid = m->reqid;
+ um.old_family = m->old_family;
+ memcpy(&um.old_daddr, &m->old_daddr, sizeof(um.old_daddr));
+ memcpy(&um.old_saddr, &m->old_saddr, sizeof(um.old_saddr));
+ um.new_family = m->new_family;
+ memcpy(&um.new_daddr, &m->new_daddr, sizeof(um.new_daddr));
+ memcpy(&um.new_saddr, &m->new_saddr, sizeof(um.new_saddr));
+
+ RTA_PUT(skb, XFRMA_MIGRATE, sizeof(um), &um);
+ return 0;
+
+rtattr_failure:
+ return -1;
+}
+
+static int build_migrate(struct sk_buff *skb, struct xfrm_migrate *m,
+ int num_migrate, struct xfrm_selector *sel,
+ u8 dir, u8 type)
+{
+ struct xfrm_migrate *mp;
+ struct xfrm_userpolicy_id *pol_id;
+ struct nlmsghdr *nlh;
+ unsigned char *b = skb->tail;
+ int i;
+
+ nlh = NLMSG_PUT(skb, 0, 0, XFRM_MSG_MIGRATE, sizeof(*pol_id));
+ pol_id = NLMSG_DATA(nlh);
+ nlh->nlmsg_flags = 0;
+
+ /* copy data from selector, dir, and type to the pol_id */
+ memset(pol_id, 0, sizeof(*pol_id));
+ memcpy(&pol_id->sel, sel, sizeof(pol_id->sel));
+ pol_id->dir = dir;
+
+ if (copy_to_user_policy_type(type, skb) < 0)
+ goto nlmsg_failure;
+
+ for (i = 0, mp = m ; i < num_migrate; i++, mp++) {
+ if (copy_to_user_migrate(mp, skb) < 0)
+ goto nlmsg_failure;
+ }
+
+ nlh->nlmsg_len = skb->tail - b;
+ return skb->len;
+nlmsg_failure:
+ skb_trim(skb, b - skb->data);
+ return -1;
+}
+
+static int xfrm_send_migrate(struct xfrm_selector *sel, u8 dir, u8 type,
+ struct xfrm_migrate *m, int num_migrate)
+{
+ struct sk_buff *skb;
+ size_t len;
+
+ len = RTA_SPACE(sizeof(struct xfrm_user_migrate) * num_migrate);
+ len += NLMSG_SPACE(sizeof(struct xfrm_userpolicy_id));
+#ifdef CONFIG_XFRM_SUB_POLICY
+ len += RTA_SPACE(sizeof(struct xfrm_userpolicy_type));
+#endif
+ skb = alloc_skb(len, GFP_ATOMIC);
+ if (skb == NULL)
+ return -ENOMEM;
+
+ /* build migrate */
+ if (build_migrate(skb, m, num_migrate, sel, dir, type) < 0)
+ BUG();
+
+ NETLINK_CB(skb).dst_group = XFRMNLGRP_MIGRATE;
+ return netlink_broadcast(xfrm_nl, skb, 0, XFRMNLGRP_MIGRATE,
+ GFP_ATOMIC);
+}
+#else
+static int xfrm_send_migrate(struct xfrm_selector *sel, u8 dir, u8 type,
+ struct xfrm_migrate *m, int num_migrate)
+{
+ return -ENOPROTOOPT;
+}
+#endif
#define XMSGSIZE(type) NLMSG_LENGTH(sizeof(struct type))
@@ -1653,6 +1823,7 @@ static const int xfrm_msg_min[XFRM_NR_MSGTYPES] = {
[XFRM_MSG_NEWAE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_aevent_id),
[XFRM_MSG_GETAE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_aevent_id),
[XFRM_MSG_REPORT - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_report),
+ [XFRM_MSG_MIGRATE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_id),
};
#undef XMSGSIZE
@@ -1679,6 +1850,7 @@ static struct xfrm_link {
[XFRM_MSG_FLUSHPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_flush_policy },
[XFRM_MSG_NEWAE - XFRM_MSG_BASE] = { .doit = xfrm_new_ae },
[XFRM_MSG_GETAE - XFRM_MSG_BASE] = { .doit = xfrm_get_ae },
+ [XFRM_MSG_MIGRATE - XFRM_MSG_BASE] = { .doit = xfrm_do_migrate },
};
static int xfrm_user_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh, int *errp)
@@ -2285,6 +2457,7 @@ static struct xfrm_mgr netlink_mgr = {
.compile_policy = xfrm_compile_policy,
.notify_policy = xfrm_send_policy_notify,
.report = xfrm_send_report,
+ .migrate = xfrm_send_migrate,
};
static int __init xfrm_user_init(void)