Kernel/linux-stable
1
0
Fork 0
mirror of https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git synced 2025-01-19 20:12:32 +00:00
Code Issues Actions Packages Projects Releases Wiki Activity

xfrm: add SA information to the offloaded packet

Browse Source 
In packet offload mode, append Security Association (SA) information
to each packet, replicating the crypto offload implementation.
The XFRM_XMIT flag is set to enable packet to be returned immediately
from the validate_xmit_xfrm function, thus aligning with the existing
code path for packet offload mode.

This SA info helps HW offload match packets to their correct security
policies. The XFRM interface ID is included, which is crucial in setups
with multiple XFRM interfaces where source/destination addresses alone
can't pinpoint the right policy.

Signed-off-by: wangfe <wangfe@google.com>
Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com>
This commit is contained in:
wangfe 2024-08-22 13:02:52 -07:00 committed by Steffen Klassert
parent 5ce90c842e
commit e7cd191f83
1 changed files with 21 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

21
net/xfrm/xfrm_output.c
View File

@ -706,6 +706,8 @@ int xfrm_output(struct sock *sk, struct sk_buff *skb)
struct xfrm_state *x = skb_dst(skb)->xfrm;
int family;
int err;
struct xfrm_offload *xo;
struct sec_path *sp;
family = (x->xso.type != XFRM_DEV_OFFLOAD_PACKET) ? x->outer_mode.family
: skb_dst(skb)->ops->family;
@ -728,6 +730,25 @@ int xfrm_output(struct sock *sk, struct sk_buff *skb)
kfree_skb(skb);
return -EHOSTUNREACH;
}
sp = secpath_set(skb);
if (!sp) {
XFRM_INC_STATS(net, LINUX_MIB_XFRMOUTERROR);
kfree_skb(skb);
return -ENOMEM;
}
sp->olen++;
sp->xvec[sp->len++] = x;
xfrm_state_hold(x);
xo = xfrm_offload(skb);
if (!xo) {
secpath_reset(skb);
XFRM_INC_STATS(net, LINUX_MIB_XFRMOUTERROR);
kfree_skb(skb);
return -EINVAL;
}
xo->flags |= XFRM_XMIT;
return xfrm_output_resume(sk, skb, 0);
}