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xfrm: restore GSO for SW crypto

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Commit 49431af6c4 incorrectly assumes that the GSO path is only used
by HW offload, but it's also useful for SW crypto.

This patch re-enables GSO for SW crypto. It's not an exact revert to
preserve the other changes made to xfrm_dev_offload_ok afterwards, but
it reverts all of its effects.

Fixes: 49431af6c4 ("xfrm: rely on XFRM offload")
Signed-off-by: Sabrina Dubroca <sd@queasysnail.net>
Reviewed-by: Leon Romanovsky <leonro@nvidia.com>
Reviewed-by: Zhu Yanjun <yanjun.zhu@linux.dev>
Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com>
This commit is contained in:
Sabrina Dubroca 2025-08-04 11:26:25 +02:00 committed by Steffen Klassert
parent 42e42562c9
commit 234d1eff5d
1 changed files with 7 additions and 2 deletions
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9
net/xfrm/xfrm_device.c
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@ -415,10 +415,12 @@ bool xfrm_dev_offload_ok(struct sk_buff *skb, struct xfrm_state *x)
struct net_device *dev = x->xso.dev;
bool check_tunnel_size;
if (x->xso.type == XFRM_DEV_OFFLOAD_UNSPECIFIED)
if (!x->type_offload ||
(x->xso.type == XFRM_DEV_OFFLOAD_UNSPECIFIED && x->encap))
return false;
if ((dev == xfrm_dst_path(dst)->dev) && !xdst->child->xfrm) {
if ((!dev || dev == xfrm_dst_path(dst)->dev) &&
!xdst->child->xfrm) {
mtu = xfrm_state_mtu(x, xdst->child_mtu_cached);
if (skb->len <= mtu)
goto ok;
@ -430,6 +432,9 @@ bool xfrm_dev_offload_ok(struct sk_buff *skb, struct xfrm_state *x)
return false;
ok:
if (!dev)
return true;
check_tunnel_size = x->xso.type == XFRM_DEV_OFFLOAD_PACKET &&
x->props.mode == XFRM_MODE_TUNNEL;
switch (x->props.family) {