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xfrm: add extack support to xfrm_dev_state_add

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Signed-off-by: Sabrina Dubroca <sd@queasysnail.net>
Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com>
This commit is contained in:
Sabrina Dubroca 2022-09-14 19:04:03 +02:00 committed by Steffen Klassert
parent 1fc8fde553
commit adb5c33e4d
3 changed files with 23 additions and 10 deletions
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5
include/net/xfrm.h
View File

@ -1886,7 +1886,8 @@ void xfrm_dev_resume(struct sk_buff *skb);
void xfrm_dev_backlog(struct softnet_data *sd);
struct sk_buff *validate_xmit_xfrm(struct sk_buff *skb, netdev_features_t features, bool *again);
int xfrm_dev_state_add(struct net *net, struct xfrm_state *x,
struct xfrm_user_offload *xuo);
struct xfrm_user_offload *xuo,
struct netlink_ext_ack *extack);
bool xfrm_dev_offload_ok(struct sk_buff *skb, struct xfrm_state *x);
static inline void xfrm_dev_state_advance_esn(struct xfrm_state *x)
@ -1949,7 +1950,7 @@ static inline struct sk_buff *validate_xmit_xfrm(struct sk_buff *skb, netdev_fea
return skb;
}
static inline int xfrm_dev_state_add(struct net *net, struct xfrm_state *x, struct xfrm_user_offload *xuo)
static inline int xfrm_dev_state_add(struct net *net, struct xfrm_state *x, struct xfrm_user_offload *xuo, struct netlink_ext_ack *extack)
{
return 0;
}

20
net/xfrm/xfrm_device.c
View File

@ -207,7 +207,8 @@ struct sk_buff *validate_xmit_xfrm(struct sk_buff *skb, netdev_features_t featur
EXPORT_SYMBOL_GPL(validate_xmit_xfrm);
int xfrm_dev_state_add(struct net *net, struct xfrm_state *x,
struct xfrm_user_offload *xuo)
struct xfrm_user_offload *xuo,
struct netlink_ext_ack *extack)
{
int err;
struct dst_entry *dst;
@ -216,15 +217,21 @@ int xfrm_dev_state_add(struct net *net, struct xfrm_state *x,
xfrm_address_t *saddr;
xfrm_address_t *daddr;
if (!x->type_offload)
if (!x->type_offload) {
NL_SET_ERR_MSG(extack, "Type doesn't support offload");
return -EINVAL;
}
/* We don't yet support UDP encapsulation and TFC padding. */
if (x->encap || x->tfcpad)
if (x->encap || x->tfcpad) {
NL_SET_ERR_MSG(extack, "Encapsulation and TFC padding can't be offloaded");
return -EINVAL;
}
if (xuo->flags & ~(XFRM_OFFLOAD_IPV6 | XFRM_OFFLOAD_INBOUND))
if (xuo->flags & ~(XFRM_OFFLOAD_IPV6 | XFRM_OFFLOAD_INBOUND)) {
NL_SET_ERR_MSG(extack, "Unrecognized flags in offload request");
return -EINVAL;
}
dev = dev_get_by_index(net, xuo->ifindex);
if (!dev) {
@ -256,6 +263,7 @@ int xfrm_dev_state_add(struct net *net, struct xfrm_state *x,
if (x->props.flags & XFRM_STATE_ESN &&
!dev->xfrmdev_ops->xdo_dev_state_advance_esn) {
NL_SET_ERR_MSG(extack, "Device doesn't support offload with ESN");
xso->dev = NULL;
dev_put(dev);
return -EINVAL;
@ -277,8 +285,10 @@ int xfrm_dev_state_add(struct net *net, struct xfrm_state *x,
xso->real_dev = NULL;
netdev_put(dev, &xso->dev_tracker);
if (err != -EOPNOTSUPP)
if (err != -EOPNOTSUPP) {
NL_SET_ERR_MSG(extack, "Device failed to offload this state");
return err;
}
}
return 0;

8
net/xfrm/xfrm_user.c
View File

@ -652,7 +652,8 @@ static void xfrm_smark_init(struct nlattr **attrs, struct xfrm_mark *m)
static struct xfrm_state *xfrm_state_construct(struct net *net,
struct xfrm_usersa_info *p,
struct nlattr **attrs,
int *errp)
int *errp,
struct netlink_ext_ack *extack)
{
struct xfrm_state *x = xfrm_state_alloc(net);
int err = -ENOMEM;
@ -735,7 +736,8 @@ static struct xfrm_state *xfrm_state_construct(struct net *net,
/* configure the hardware if offload is requested */
if (attrs[XFRMA_OFFLOAD_DEV]) {
err = xfrm_dev_state_add(net, x,
nla_data(attrs[XFRMA_OFFLOAD_DEV]));
nla_data(attrs[XFRMA_OFFLOAD_DEV]),
extack);
if (err)
goto error;
}
@ -763,7 +765,7 @@ static int xfrm_add_sa(struct sk_buff *skb, struct nlmsghdr *nlh,
if (err)
return err;
x = xfrm_state_construct(net, p, attrs, &err);
x = xfrm_state_construct(net, p, attrs, &err, extack);
if (!x)
return err;