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Commit c255bd68 authored by David Ahern's avatar David Ahern Committed by David S. Miller
Browse files

net: lwtunnel: Add extack to encap attr validation 



Pass extack down to lwtunnel_valid_encap_type and
lwtunnel_valid_encap_type_attr. Add messages for unknown
or unsupported encap types.

Signed-off-by: default avatarDavid Ahern <dsahern@gmail.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 78055998

include/net/lwtunnel.h

+9 −4
Original line number Diff line number Diff line
@@ -107,8 +107,10 @@ int lwtunnel_encap_add_ops(const struct lwtunnel_encap_ops *op, 
			   unsigned int num);

int lwtunnel_encap_del_ops(const struct lwtunnel_encap_ops *op,

			   unsigned int num);

int lwtunnel_valid_encap_type(u16 encap_type);

int lwtunnel_valid_encap_type_attr(struct nlattr *attr, int len);

int lwtunnel_valid_encap_type(u16 encap_type,

			      struct netlink_ext_ack *extack);

int lwtunnel_valid_encap_type_attr(struct nlattr *attr, int len,

				   struct netlink_ext_ack *extack);

int lwtunnel_build_state(u16 encap_type,

			 struct nlattr *encap,

			 unsigned int family, const void *cfg,
@@ -172,11 +174,14 @@ static inline int lwtunnel_encap_del_ops(const struct lwtunnel_encap_ops *op, 
	return -EOPNOTSUPP;

}



static inline int lwtunnel_valid_encap_type(u16 encap_type)

static inline int lwtunnel_valid_encap_type(u16 encap_type,

					    struct netlink_ext_ack *extack)

{

	NL_SET_ERR_MSG(extack, "CONFIG_LWTUNNEL is not enabled in this kernel");

	return -EOPNOTSUPP;

}

static inline int lwtunnel_valid_encap_type_attr(struct nlattr *attr, int len)

static inline int lwtunnel_valid_encap_type_attr(struct nlattr *attr, int len,

						 struct netlink_ext_ack *extack)

{

	/* return 0 since we are not walking attr looking for

	 * RTA_ENCAP_TYPE attribute on nexthops.

net/core/lwtunnel.c

+13 −5
Original line number Diff line number Diff line
@@ -126,14 +126,16 @@ int lwtunnel_build_state(u16 encap_type, 
}

EXPORT_SYMBOL(lwtunnel_build_state);



int lwtunnel_valid_encap_type(u16 encap_type)

int lwtunnel_valid_encap_type(u16 encap_type, struct netlink_ext_ack *extack)

{

	const struct lwtunnel_encap_ops *ops;

	int ret = -EINVAL;



	if (encap_type == LWTUNNEL_ENCAP_NONE ||

	    encap_type > LWTUNNEL_ENCAP_MAX)

	    encap_type > LWTUNNEL_ENCAP_MAX) {

		NL_SET_ERR_MSG(extack, "Unknown lwt encapsulation type");

		return ret;

	}



	rcu_read_lock();

	ops = rcu_dereference(lwtun_encaps[encap_type]);
@@ -153,11 +155,16 @@ int lwtunnel_valid_encap_type(u16 encap_type) 
		}

	}

#endif

	return ops ? 0 : -EOPNOTSUPP;

	ret = ops ? 0 : -EOPNOTSUPP;

	if (ret < 0)

		NL_SET_ERR_MSG(extack, "lwt encapsulation type not supported");



	return ret;

}

EXPORT_SYMBOL(lwtunnel_valid_encap_type);



int lwtunnel_valid_encap_type_attr(struct nlattr *attr, int remaining)

int lwtunnel_valid_encap_type_attr(struct nlattr *attr, int remaining,

				   struct netlink_ext_ack *extack)

{

	struct rtnexthop *rtnh = (struct rtnexthop *)attr;

	struct nlattr *nla_entype;
@@ -174,7 +181,8 @@ int lwtunnel_valid_encap_type_attr(struct nlattr *attr, int remaining) 
			if (nla_entype) {

				encap_type = nla_get_u16(nla_entype);



				if (lwtunnel_valid_encap_type(encap_type) != 0)

				if (lwtunnel_valid_encap_type(encap_type,

							      extack) != 0)

					return -EOPNOTSUPP;

			}

		}

net/ipv4/fib_frontend.c

+4 −2
Original line number Diff line number Diff line
@@ -685,7 +685,8 @@ static int rtm_to_fib_config(struct net *net, struct sk_buff *skb, 
			break;

		case RTA_MULTIPATH:

			err = lwtunnel_valid_encap_type_attr(nla_data(attr),

							     nla_len(attr));

							     nla_len(attr),

							     extack);

			if (err < 0)

				goto errout;

			cfg->fc_mp = nla_data(attr);
@@ -702,7 +703,8 @@ static int rtm_to_fib_config(struct net *net, struct sk_buff *skb, 
			break;

		case RTA_ENCAP_TYPE:

			cfg->fc_encap_type = nla_get_u16(attr);

			err = lwtunnel_valid_encap_type(cfg->fc_encap_type);

			err = lwtunnel_valid_encap_type(cfg->fc_encap_type,

							extack);

			if (err < 0)

				goto errout;

			break;

net/ipv6/route.c

+2 −2
Original line number Diff line number Diff line
@@ -3016,7 +3016,7 @@ static int rtm_to_fib6_config(struct sk_buff *skb, struct nlmsghdr *nlh, 
		cfg->fc_mp_len = nla_len(tb[RTA_MULTIPATH]);



		err = lwtunnel_valid_encap_type_attr(cfg->fc_mp,

						     cfg->fc_mp_len);

						     cfg->fc_mp_len, extack);

		if (err < 0)

			goto errout;

	}
@@ -3035,7 +3035,7 @@ static int rtm_to_fib6_config(struct sk_buff *skb, struct nlmsghdr *nlh, 
	if (tb[RTA_ENCAP_TYPE]) {

		cfg->fc_encap_type = nla_get_u16(tb[RTA_ENCAP_TYPE]);



		err = lwtunnel_valid_encap_type(cfg->fc_encap_type);

		err = lwtunnel_valid_encap_type(cfg->fc_encap_type, extack);

		if (err < 0)

			goto errout;

	}