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psp: clarify checksum behavior of psp_dev_rcv()

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psp_dev_rcv() decapsulates psp headers from a received frame. This
will make any csum complete computed by the device inaccurate. Rather
than attempt to patch up skb->csum in psp_dev_rcv() just make it clear
to callers what they can expect regarding checksum complete.

Signed-off-by: Daniel Zahka <daniel.zahka@gmail.com>
Link: https://patch.msgid.link/20250918212723.17495-1-daniel.zahka@gmail.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Daniel Zahka 2025-09-18 14:27:20 -07:00 committed by Jakub Kicinski
parent f1bf77491d
commit 85c7333c35
1 changed files with 2 additions and 1 deletions
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3
net/psp/psp_main.c
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@ -228,7 +228,8 @@ EXPORT_SYMBOL(psp_dev_encapsulate);
* Presently it accepts only already-authenticated packets and does not
* support optional fields, such as virtualization cookies. The caller should
* ensure that skb->data is pointing to the mac header, and that skb->mac_len
* is set.
* is set. This function does not currently adjust skb->csum (CHECKSUM_COMPLETE
* is not supported).
*/
int psp_dev_rcv(struct sk_buff *skb, u16 dev_id, u8 generation, bool strip_icv)
{