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xfrm: ipcomp: add extack to ipcomp{4,6}_init_state

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And the shared helper ipcomp_init_state.

Signed-off-by: Sabrina Dubroca <sd@queasysnail.net>
Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com>
This commit is contained in:
Sabrina Dubroca 2022-09-27 17:45:33 +02:00 committed by Steffen Klassert
parent 25ec92cd04
commit 6ee5532052
4 changed files with 18 additions and 8 deletions
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2
include/net/ipcomp.h
View file

@ -22,7 +22,7 @@ struct xfrm_state;
int ipcomp_input(struct xfrm_state *x, struct sk_buff *skb);
int ipcomp_output(struct xfrm_state *x, struct sk_buff *skb);
void ipcomp_destroy(struct xfrm_state *x);
int ipcomp_init_state(struct xfrm_state *x);
int ipcomp_init_state(struct xfrm_state *x, struct netlink_ext_ack *extack);
static inline struct ip_comp_hdr *ip_comp_hdr(const struct sk_buff *skb)
{

7
net/ipv4/ipcomp.c
View file

@ -130,17 +130,20 @@ static int ipcomp4_init_state(struct xfrm_state *x,
x->props.header_len += sizeof(struct iphdr);
break;
default:
NL_SET_ERR_MSG(extack, "Unsupported XFRM mode for IPcomp");
goto out;
}
err = ipcomp_init_state(x);
err = ipcomp_init_state(x, extack);
if (err)
goto out;
if (x->props.mode == XFRM_MODE_TUNNEL) {
err = ipcomp_tunnel_attach(x);
if (err)
if (err) {
NL_SET_ERR_MSG(extack, "Kernel error: failed to initialize the associated state");
goto out;
}
}
err = 0;

7
net/ipv6/ipcomp6.c
View file

@ -149,17 +149,20 @@ static int ipcomp6_init_state(struct xfrm_state *x,
x->props.header_len += sizeof(struct ipv6hdr);
break;
default:
NL_SET_ERR_MSG(extack, "Unsupported XFRM mode for IPcomp");
goto out;
}
err = ipcomp_init_state(x);
err = ipcomp_init_state(x, extack);
if (err)
goto out;
if (x->props.mode == XFRM_MODE_TUNNEL) {
err = ipcomp6_tunnel_attach(x);
if (err)
if (err) {
NL_SET_ERR_MSG(extack, "Kernel error: failed to initialize the associated state");
goto out;
}
}
err = 0;

10
net/xfrm/xfrm_ipcomp.c
View file

@ -325,18 +325,22 @@ void ipcomp_destroy(struct xfrm_state *x)
}
EXPORT_SYMBOL_GPL(ipcomp_destroy);
int ipcomp_init_state(struct xfrm_state *x)
int ipcomp_init_state(struct xfrm_state *x, struct netlink_ext_ack *extack)
{
int err;
struct ipcomp_data *ipcd;
struct xfrm_algo_desc *calg_desc;
err = -EINVAL;
if (!x->calg)
if (!x->calg) {
NL_SET_ERR_MSG(extack, "Missing required compression algorithm");
goto out;
}
if (x->encap)
if (x->encap) {
NL_SET_ERR_MSG(extack, "IPComp is not compatible with encapsulation");
goto out;
}
err = -ENOMEM;
ipcd = kzalloc(sizeof(*ipcd), GFP_KERNEL);