1 files changed, 287 insertions, 40 deletions

diff --git a/net/sched/act_tunnel_key.c b/net/sched/act_tunnel_key.c
index 9bc6c2ae98a5..ba2ae9f75ef5 100644
--- a/net/sched/act_tunnel_key.c
+++ b/net/sched/act_tunnel_key.c
@@ -13,6 +13,7 @@
 #include <linux/kernel.h>
 #include <linux/skbuff.h>
 #include <linux/rtnetlink.h>
+#include <net/geneve.h>
 #include <net/netlink.h>
 #include <net/pkt_sched.h>
 #include <net/dst.h>
@@ -30,9 +31,7 @@ static int tunnel_key_act(struct sk_buff *skb, const struct tc_action *a,
 	struct tcf_tunnel_key_params *params;
 	int action;
 
-	rcu_read_lock();
-
-	params = rcu_dereference(t->params);
+	params = rcu_dereference_bh(t->params);
 
 	tcf_lastuse_update(&t->tcf_tm);
 	bstats_cpu_update(this_cpu_ptr(t->common.cpu_bstats), skb);
@@ -52,11 +51,138 @@ static int tunnel_key_act(struct sk_buff *skb, const struct tc_action *a,
 		break;
 	}
 
-	rcu_read_unlock();
-
 	return action;
 }
 
+static const struct nla_policy
+enc_opts_policy[TCA_TUNNEL_KEY_ENC_OPTS_MAX + 1] = {
+	[TCA_TUNNEL_KEY_ENC_OPTS_GENEVE]	= { .type = NLA_NESTED },
+};
+
+static const struct nla_policy
+geneve_opt_policy[TCA_TUNNEL_KEY_ENC_OPT_GENEVE_MAX + 1] = {
+	[TCA_TUNNEL_KEY_ENC_OPT_GENEVE_CLASS]	   = { .type = NLA_U16 },
+	[TCA_TUNNEL_KEY_ENC_OPT_GENEVE_TYPE]	   = { .type = NLA_U8 },
+	[TCA_TUNNEL_KEY_ENC_OPT_GENEVE_DATA]	   = { .type = NLA_BINARY,
+						       .len = 128 },
+};
+
+static int
+tunnel_key_copy_geneve_opt(const struct nlattr *nla, void *dst, int dst_len,
+			   struct netlink_ext_ack *extack)
+{
+	struct nlattr *tb[TCA_TUNNEL_KEY_ENC_OPT_GENEVE_MAX + 1];
+	int err, data_len, opt_len;
+	u8 *data;
+
+	err = nla_parse_nested(tb, TCA_TUNNEL_KEY_ENC_OPT_GENEVE_MAX,
+			       nla, geneve_opt_policy, extack);
+	if (err < 0)
+		return err;
+
+	if (!tb[TCA_TUNNEL_KEY_ENC_OPT_GENEVE_CLASS] ||
+	    !tb[TCA_TUNNEL_KEY_ENC_OPT_GENEVE_TYPE] ||
+	    !tb[TCA_TUNNEL_KEY_ENC_OPT_GENEVE_DATA]) {
+		NL_SET_ERR_MSG(extack, "Missing tunnel key geneve option class, type or data");
+		return -EINVAL;
+	}
+
+	data = nla_data(tb[TCA_TUNNEL_KEY_ENC_OPT_GENEVE_DATA]);
+	data_len = nla_len(tb[TCA_TUNNEL_KEY_ENC_OPT_GENEVE_DATA]);
+	if (data_len < 4) {
+		NL_SET_ERR_MSG(extack, "Tunnel key geneve option data is less than 4 bytes long");
+		return -ERANGE;
+	}
+	if (data_len % 4) {
+		NL_SET_ERR_MSG(extack, "Tunnel key geneve option data is not a multiple of 4 bytes long");
+		return -ERANGE;
+	}
+
+	opt_len = sizeof(struct geneve_opt) + data_len;
+	if (dst) {
+		struct geneve_opt *opt = dst;
+
+		WARN_ON(dst_len < opt_len);
+
+		opt->opt_class =
+			nla_get_be16(tb[TCA_TUNNEL_KEY_ENC_OPT_GENEVE_CLASS]);
+		opt->type = nla_get_u8(tb[TCA_TUNNEL_KEY_ENC_OPT_GENEVE_TYPE]);
+		opt->length = data_len / 4; /* length is in units of 4 bytes */
+		opt->r1 = 0;
+		opt->r2 = 0;
+		opt->r3 = 0;
+
+		memcpy(opt + 1, data, data_len);
+	}
+
+	return opt_len;
+}
+
+static int tunnel_key_copy_opts(const struct nlattr *nla, u8 *dst,
+				int dst_len, struct netlink_ext_ack *extack)
+{
+	int err, rem, opt_len, len = nla_len(nla), opts_len = 0;
+	const struct nlattr *attr, *head = nla_data(nla);
+
+	err = nla_validate(head, len, TCA_TUNNEL_KEY_ENC_OPTS_MAX,
+			   enc_opts_policy, extack);
+	if (err)
+		return err;
+
+	nla_for_each_attr(attr, head, len, rem) {
+		switch (nla_type(attr)) {
+		case TCA_TUNNEL_KEY_ENC_OPTS_GENEVE:
+			opt_len = tunnel_key_copy_geneve_opt(attr, dst,
+							     dst_len, extack);
+			if (opt_len < 0)
+				return opt_len;
+			opts_len += opt_len;
+			if (dst) {
+				dst_len -= opt_len;
+				dst += opt_len;
+			}
+			break;
+		}
+	}
+
+	if (!opts_len) {
+		NL_SET_ERR_MSG(extack, "Empty list of tunnel options");
+		return -EINVAL;
+	}
+
+	if (rem > 0) {
+		NL_SET_ERR_MSG(extack, "Trailing data after parsing tunnel key options attributes");
+		return -EINVAL;
+	}
+
+	return opts_len;
+}
+
+static int tunnel_key_get_opts_len(struct nlattr *nla,
+				   struct netlink_ext_ack *extack)
+{
+	return tunnel_key_copy_opts(nla, NULL, 0, extack);
+}
+
+static int tunnel_key_opts_set(struct nlattr *nla, struct ip_tunnel_info *info,
+			       int opts_len, struct netlink_ext_ack *extack)
+{
+	info->options_len = opts_len;
+	switch (nla_type(nla_data(nla))) {
+	case TCA_TUNNEL_KEY_ENC_OPTS_GENEVE:
+#if IS_ENABLED(CONFIG_INET)
+		info->key.tun_flags |= TUNNEL_GENEVE_OPT;
+		return tunnel_key_copy_opts(nla, ip_tunnel_info_opts(info),
+					    opts_len, extack);
+#else
+		return -EAFNOSUPPORT;
+#endif
+	default:
+		NL_SET_ERR_MSG(extack, "Cannot set tunnel options for unknown tunnel type");
+		return -EINVAL;
+	}
+}
+
 static const struct nla_policy tunnel_key_policy[TCA_TUNNEL_KEY_MAX + 1] = {
 	[TCA_TUNNEL_KEY_PARMS]	    = { .len = sizeof(struct tc_tunnel_key) },
 	[TCA_TUNNEL_KEY_ENC_IPV4_SRC] = { .type = NLA_U32 },
@@ -66,39 +192,53 @@ static const struct nla_policy tunnel_key_policy[TCA_TUNNEL_KEY_MAX + 1] = {
 	[TCA_TUNNEL_KEY_ENC_KEY_ID]   = { .type = NLA_U32 },
 	[TCA_TUNNEL_KEY_ENC_DST_PORT] = {.type = NLA_U16},
 	[TCA_TUNNEL_KEY_NO_CSUM]      = { .type = NLA_U8 },
+	[TCA_TUNNEL_KEY_ENC_OPTS]     = { .type = NLA_NESTED },
+	[TCA_TUNNEL_KEY_ENC_TOS]      = { .type = NLA_U8 },
+	[TCA_TUNNEL_KEY_ENC_TTL]      = { .type = NLA_U8 },
 };
 
 static int tunnel_key_init(struct net *net, struct nlattr *nla,
 			   struct nlattr *est, struct tc_action **a,
-			   int ovr, int bind, struct netlink_ext_ack *extack)
+			   int ovr, int bind, bool rtnl_held,
+			   struct netlink_ext_ack *extack)
 {
 	struct tc_action_net *tn = net_generic(net, tunnel_key_net_id);
 	struct nlattr *tb[TCA_TUNNEL_KEY_MAX + 1];
-	struct tcf_tunnel_key_params *params_old;
 	struct tcf_tunnel_key_params *params_new;
 	struct metadata_dst *metadata = NULL;
 	struct tc_tunnel_key *parm;
 	struct tcf_tunnel_key *t;
 	bool exists = false;
 	__be16 dst_port = 0;
+	int opts_len = 0;
 	__be64 key_id;
 	__be16 flags;
+	u8 tos, ttl;
 	int ret = 0;
 	int err;
 
-	if (!nla)
+	if (!nla) {
+		NL_SET_ERR_MSG(extack, "Tunnel requires attributes to be passed");
 		return -EINVAL;
+	}
 
 	err = nla_parse_nested(tb, TCA_TUNNEL_KEY_MAX, nla, tunnel_key_policy,
-			       NULL);
-	if (err < 0)
+			       extack);
+	if (err < 0) {
+		NL_SET_ERR_MSG(extack, "Failed to parse nested tunnel key attributes");
 		return err;
+	}
 
-	if (!tb[TCA_TUNNEL_KEY_PARMS])
+	if (!tb[TCA_TUNNEL_KEY_PARMS]) {
+		NL_SET_ERR_MSG(extack, "Missing tunnel key parameters");
 		return -EINVAL;
+	}
 
 	parm = nla_data(tb[TCA_TUNNEL_KEY_PARMS]);
-	exists = tcf_idr_check(tn, parm->index, a, bind);
+	err = tcf_idr_check_alloc(tn, &parm->index, a, bind);
+	if (err < 0)
+		return err;
+	exists = err;
 	if (exists && bind)
 		return 0;
 
@@ -107,6 +247,7 @@ static int tunnel_key_init(struct net *net, struct nlattr *nla,
 		break;
 	case TCA_TUNNEL_KEY_ACT_SET:
 		if (!tb[TCA_TUNNEL_KEY_ENC_KEY_ID]) {
+			NL_SET_ERR_MSG(extack, "Missing tunnel key id");
 			ret = -EINVAL;
 			goto err_out;
 		}
@@ -121,6 +262,22 @@ static int tunnel_key_init(struct net *net, struct nlattr *nla,
 		if (tb[TCA_TUNNEL_KEY_ENC_DST_PORT])
 			dst_port = nla_get_be16(tb[TCA_TUNNEL_KEY_ENC_DST_PORT]);
 
+		if (tb[TCA_TUNNEL_KEY_ENC_OPTS]) {
+			opts_len = tunnel_key_get_opts_len(tb[TCA_TUNNEL_KEY_ENC_OPTS],
+							   extack);
+			if (opts_len < 0) {
+				ret = opts_len;
+				goto err_out;
+			}
+		}
+
+		tos = 0;
+		if (tb[TCA_TUNNEL_KEY_ENC_TOS])
+			tos = nla_get_u8(tb[TCA_TUNNEL_KEY_ENC_TOS]);
+		ttl = 0;
+		if (tb[TCA_TUNNEL_KEY_ENC_TTL])
+			ttl = nla_get_u8(tb[TCA_TUNNEL_KEY_ENC_TTL]);
+
 		if (tb[TCA_TUNNEL_KEY_ENC_IPV4_SRC] &&
 		    tb[TCA_TUNNEL_KEY_ENC_IPV4_DST]) {
 			__be32 saddr;
@@ -129,9 +286,9 @@ static int tunnel_key_init(struct net *net, struct nlattr *nla,
 			saddr = nla_get_in_addr(tb[TCA_TUNNEL_KEY_ENC_IPV4_SRC]);
 			daddr = nla_get_in_addr(tb[TCA_TUNNEL_KEY_ENC_IPV4_DST]);
 
-			metadata = __ip_tun_set_dst(saddr, daddr, 0, 0,
+			metadata = __ip_tun_set_dst(saddr, daddr, tos, ttl,
 						    dst_port, flags,
-						    key_id, 0);
+						    key_id, opts_len);
 		} else if (tb[TCA_TUNNEL_KEY_ENC_IPV6_SRC] &&
 			   tb[TCA_TUNNEL_KEY_ENC_IPV6_DST]) {
 			struct in6_addr saddr;
@@ -140,19 +297,33 @@ static int tunnel_key_init(struct net *net, struct nlattr *nla,
 			saddr = nla_get_in6_addr(tb[TCA_TUNNEL_KEY_ENC_IPV6_SRC]);
 			daddr = nla_get_in6_addr(tb[TCA_TUNNEL_KEY_ENC_IPV6_DST]);
 
-			metadata = __ipv6_tun_set_dst(&saddr, &daddr, 0, 0, dst_port,
+			metadata = __ipv6_tun_set_dst(&saddr, &daddr, tos, ttl, dst_port,
 						      0, flags,
 						      key_id, 0);
+		} else {
+			NL_SET_ERR_MSG(extack, "Missing either ipv4 or ipv6 src and dst");
+			ret = -EINVAL;
+			goto err_out;
 		}
 
 		if (!metadata) {
-			ret = -EINVAL;
+			NL_SET_ERR_MSG(extack, "Cannot allocate tunnel metadata dst");
+			ret = -ENOMEM;
 			goto err_out;
 		}
 
+		if (opts_len) {
+			ret = tunnel_key_opts_set(tb[TCA_TUNNEL_KEY_ENC_OPTS],
+						  &metadata->u.tun_info,
+						  opts_len, extack);
+			if (ret < 0)
+				goto err_out;
+		}
+
 		metadata->u.tun_info.mode |= IP_TUNNEL_INFO_TX;
 		break;
 	default:
+		NL_SET_ERR_MSG(extack, "Unknown tunnel key action");
 		ret = -EINVAL;
 		goto err_out;
 	}
@@ -160,36 +331,36 @@ static int tunnel_key_init(struct net *net, struct nlattr *nla,
 	if (!exists) {
 		ret = tcf_idr_create(tn, parm->index, est, a,
 				     &act_tunnel_key_ops, bind, true);
-		if (ret)
-			return ret;
+		if (ret) {
+			NL_SET_ERR_MSG(extack, "Cannot create TC IDR");
+			goto err_out;
+		}
 
 		ret = ACT_P_CREATED;
-	} else {
+	} else if (!ovr) {
 		tcf_idr_release(*a, bind);
-		if (!ovr)
-			return -EEXIST;
+		NL_SET_ERR_MSG(extack, "TC IDR already exists");
+		return -EEXIST;
 	}
 
 	t = to_tunnel_key(*a);
 
-	ASSERT_RTNL();
 	params_new = kzalloc(sizeof(*params_new), GFP_KERNEL);
 	if (unlikely(!params_new)) {
-		if (ret == ACT_P_CREATED)
-			tcf_idr_release(*a, bind);
+		tcf_idr_release(*a, bind);
+		NL_SET_ERR_MSG(extack, "Cannot allocate tunnel key parameters");
 		return -ENOMEM;
 	}
-
-	params_old = rtnl_dereference(t->params);
-
-	t->tcf_action = parm->action;
 	params_new->tcft_action = parm->t_action;
 	params_new->tcft_enc_metadata = metadata;
 
-	rcu_assign_pointer(t->params, params_new);
-
-	if (params_old)
-		kfree_rcu(params_old, rcu);
+	spin_lock(&t->tcf_lock);
+	t->tcf_action = parm->action;
+	rcu_swap_protected(t->params, params_new,
+			   lockdep_is_held(&t->tcf_lock));
+	spin_unlock(&t->tcf_lock);
+	if (params_new)
+		kfree_rcu(params_new, rcu);
 
 	if (ret == ACT_P_CREATED)
 		tcf_idr_insert(tn, *a);
@@ -199,6 +370,8 @@ static int tunnel_key_init(struct net *net, struct nlattr *nla,
 err_out:
 	if (exists)
 		tcf_idr_release(*a, bind);
+	else
+		tcf_idr_cleanup(tn, parm->index);
 	return ret;
 }
 
@@ -216,6 +389,61 @@ static void tunnel_key_release(struct tc_action *a)
 	}
 }
 
+static int tunnel_key_geneve_opts_dump(struct sk_buff *skb,
+				       const struct ip_tunnel_info *info)
+{
+	int len = info->options_len;
+	u8 *src = (u8 *)(info + 1);
+	struct nlattr *start;
+
+	start = nla_nest_start(skb, TCA_TUNNEL_KEY_ENC_OPTS_GENEVE);
+	if (!start)
+		return -EMSGSIZE;
+
+	while (len > 0) {
+		struct geneve_opt *opt = (struct geneve_opt *)src;
+
+		if (nla_put_be16(skb, TCA_TUNNEL_KEY_ENC_OPT_GENEVE_CLASS,
+				 opt->opt_class) ||
+		    nla_put_u8(skb, TCA_TUNNEL_KEY_ENC_OPT_GENEVE_TYPE,
+			       opt->type) ||
+		    nla_put(skb, TCA_TUNNEL_KEY_ENC_OPT_GENEVE_DATA,
+			    opt->length * 4, opt + 1))
+			return -EMSGSIZE;
+
+		len -= sizeof(struct geneve_opt) + opt->length * 4;
+		src += sizeof(struct geneve_opt) + opt->length * 4;
+	}
+
+	nla_nest_end(skb, start);
+	return 0;
+}
+
+static int tunnel_key_opts_dump(struct sk_buff *skb,
+				const struct ip_tunnel_info *info)
+{
+	struct nlattr *start;
+	int err;
+
+	if (!info->options_len)
+		return 0;
+
+	start = nla_nest_start(skb, TCA_TUNNEL_KEY_ENC_OPTS);
+	if (!start)
+		return -EMSGSIZE;
+
+	if (info->key.tun_flags & TUNNEL_GENEVE_OPT) {
+		err = tunnel_key_geneve_opts_dump(skb, info);
+		if (err)
+			return err;
+	} else {
+		return -EINVAL;
+	}
+
+	nla_nest_end(skb, start);
+	return 0;
+}
+
 static int tunnel_key_dump_addresses(struct sk_buff *skb,
 				     const struct ip_tunnel_info *info)
 {
@@ -252,22 +480,24 @@ static int tunnel_key_dump(struct sk_buff *skb, struct tc_action *a,
 	struct tcf_tunnel_key_params *params;
 	struct tc_tunnel_key opt = {
 		.index    = t->tcf_index,
-		.refcnt   = t->tcf_refcnt - ref,
-		.bindcnt  = t->tcf_bindcnt - bind,
-		.action   = t->tcf_action,
+		.refcnt   = refcount_read(&t->tcf_refcnt) - ref,
+		.bindcnt  = atomic_read(&t->tcf_bindcnt) - bind,
 	};
 	struct tcf_t tm;
 
-	params = rtnl_dereference(t->params);
-
+	spin_lock(&t->tcf_lock);
+	params = rcu_dereference_protected(t->params,
+					   lockdep_is_held(&t->tcf_lock));
+	opt.action   = t->tcf_action;
 	opt.t_action = params->tcft_action;
 
 	if (nla_put(skb, TCA_TUNNEL_KEY_PARMS, sizeof(opt), &opt))
 		goto nla_put_failure;
 
 	if (params->tcft_action == TCA_TUNNEL_KEY_ACT_SET) {
-		struct ip_tunnel_key *key =
-			&params->tcft_enc_metadata->u.tun_info.key;
+		struct ip_tunnel_info *info =
+			&params->tcft_enc_metadata->u.tun_info;
+		struct ip_tunnel_key *key = &info->key;
 		__be32 key_id = tunnel_id_to_key32(key->tun_id);
 
 		if (nla_put_be32(skb, TCA_TUNNEL_KEY_ENC_KEY_ID, key_id) ||
@@ -275,7 +505,14 @@ static int tunnel_key_dump(struct sk_buff *skb, struct tc_action *a,
 					      &params->tcft_enc_metadata->u.tun_info) ||
 		    nla_put_be16(skb, TCA_TUNNEL_KEY_ENC_DST_PORT, key->tp_dst) ||
 		    nla_put_u8(skb, TCA_TUNNEL_KEY_NO_CSUM,
-			       !(key->tun_flags & TUNNEL_CSUM)))
+			       !(key->tun_flags & TUNNEL_CSUM)) ||
+		    tunnel_key_opts_dump(skb, info))
+			goto nla_put_failure;
+
+		if (key->tos && nla_put_u8(skb, TCA_TUNNEL_KEY_ENC_TOS, key->tos))
+			goto nla_put_failure;
+
+		if (key->ttl && nla_put_u8(skb, TCA_TUNNEL_KEY_ENC_TTL, key->ttl))
 			goto nla_put_failure;
 	}
 
@@ -283,10 +520,12 @@ static int tunnel_key_dump(struct sk_buff *skb, struct tc_action *a,
 	if (nla_put_64bit(skb, TCA_TUNNEL_KEY_TM, sizeof(tm),
 			  &tm, TCA_TUNNEL_KEY_PAD))
 		goto nla_put_failure;
+	spin_unlock(&t->tcf_lock);
 
 	return skb->len;
 
 nla_put_failure:
+	spin_unlock(&t->tcf_lock);
 	nlmsg_trim(skb, b);
 	return -1;
 }
@@ -309,6 +548,13 @@ static int tunnel_key_search(struct net *net, struct tc_action **a, u32 index,
 	return tcf_idr_search(tn, a, index);
 }
 
+static int tunnel_key_delete(struct net *net, u32 index)
+{
+	struct tc_action_net *tn = net_generic(net, tunnel_key_net_id);
+
+	return tcf_idr_delete_index(tn, index);
+}
+
 static struct tc_action_ops act_tunnel_key_ops = {
 	.kind		=	"tunnel_key",
 	.type		=	TCA_ACT_TUNNEL_KEY,
@@ -319,6 +565,7 @@ static struct tc_action_ops act_tunnel_key_ops = {
 	.cleanup	=	tunnel_key_release,
 	.walk		=	tunnel_key_walker,
 	.lookup		=	tunnel_key_search,
+	.delete		=	tunnel_key_delete,
 	.size		=	sizeof(struct tcf_tunnel_key),
 };