From f857478d62066ee94831a5e0679fc18c246cd534 Mon Sep 17 00:00:00 2001 From: Jakub Kicinski Date: Sat, 27 Sep 2025 15:54:13 -0700 Subject: netdevsim: a basic test PSP implementation Provide a PSP implementation for netdevsim. Use psp_dev_encapsulate() and psp_dev_rcv() to do actual encapsulation and decapsulation on skbs, but perform no encryption or decryption. In order to make encryption with a bad key result in a drop on the peer's rx side, we stash our psd's generation number in the first byte of each key before handing to the peer. Signed-off-by: Jakub Kicinski Co-developed-by: Daniel Zahka Signed-off-by: Daniel Zahka Link: https://patch.msgid.link/20250927225420.1443468-2-kuba@kernel.org Reviewed-by: Willem de Bruijn Signed-off-by: Paolo Abeni --- drivers/net/netdevsim/netdevsim.h | 27 +++++++++++++++++++++++++++ 1 file changed, 27 insertions(+) (limited to 'drivers/net/netdevsim/netdevsim.h') diff --git a/drivers/net/netdevsim/netdevsim.h b/drivers/net/netdevsim/netdevsim.h index bddd24c1389d..02c1c97b7008 100644 --- a/drivers/net/netdevsim/netdevsim.h +++ b/drivers/net/netdevsim/netdevsim.h @@ -108,6 +108,12 @@ struct netdevsim { int rq_reset_mode; + struct { + struct psp_dev *dev; + u32 spi; + u32 assoc_cnt; + } psp; + struct nsim_bus_dev *nsim_bus_dev; struct bpf_prog *bpf_offloaded; @@ -421,6 +427,27 @@ static inline void nsim_macsec_teardown(struct netdevsim *ns) } #endif +#if IS_ENABLED(CONFIG_INET_PSP) +int nsim_psp_init(struct netdevsim *ns); +void nsim_psp_uninit(struct netdevsim *ns); +void nsim_psp_handle_ext(struct sk_buff *skb, struct skb_ext *psp_ext); +enum skb_drop_reason +nsim_do_psp(struct sk_buff *skb, struct netdevsim *ns, + struct netdevsim *peer_ns, struct skb_ext **psp_ext); +#else +static inline int nsim_psp_init(struct netdevsim *ns) { return 0; } +static inline void nsim_psp_uninit(struct netdevsim *ns) {} +static inline enum skb_drop_reason +nsim_do_psp(struct sk_buff *skb, struct netdevsim *ns, + struct netdevsim *peer_ns, struct skb_ext **psp_ext) +{ + return 0; +} + +static inline void +nsim_psp_handle_ext(struct sk_buff *skb, struct skb_ext *psp_ext) {} +#endif + struct nsim_bus_dev { struct device dev; struct list_head list; -- cgit v1.2.3