[PATCH v2 03/17] net: modify core data structures for PSP datapath support
From: Daniel Zahka <daniel.zahka@gmail.com>
Date: 2025-06-25 13:52:16
Subsystem:
networking [general], networking [sockets], networking [tcp], psp security protocol, the rest · Maintainers:
"David S. Miller", Eric Dumazet, Jakub Kicinski, Paolo Abeni, Kuniyuki Iwashima, Willem de Bruijn, Neal Cardwell, Daniel Zahka, Willem de Bruijn, Linus Torvalds
From: Jakub Kicinski <kuba@kernel.org>
Add pointers to psp data structures to core networking structs,
and an SKB extension to carry the PSP information from the drivers
to the socket layer.
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Daniel Zahka <daniel.zahka@gmail.com>
Co-developed-by: Daniel Zahka <daniel.zahka@gmail.com>
---
Notes:
v2:
- Add dev_id field to psp_skb_ext
- Move psp_assoc from struct tcp_timewait_sock to struct
inet_timewait_sock
- Move psp_sk_assoc_free() from sk_common_release() to
inet_sock_destruct()
v1:
- https://lore.kernel.org/netdev/20240510030435.120935-4-kuba@kernel.org/ (local)
include/linux/skbuff.h | 3 +++
include/net/inet_timewait_sock.h | 3 +++
include/net/psp/functions.h | 6 ++++++
include/net/psp/types.h | 7 +++++++
include/net/sock.h | 4 ++++
net/core/skbuff.c | 4 ++++
net/ipv4/af_inet.c | 2 ++
net/ipv4/tcp_minisocks.c | 2 ++
8 files changed, 31 insertions(+)
diff --git a/include/linux/skbuff.h b/include/linux/skbuff.h
index 4f6dcb37bae8..0a9a3ce91226 100644
--- a/include/linux/skbuff.h
+++ b/include/linux/skbuff.h@@ -4835,6 +4835,9 @@ enum skb_ext_id { #endif #if IS_ENABLED(CONFIG_MCTP_FLOWS) SKB_EXT_MCTP, +#endif +#if IS_ENABLED(CONFIG_INET_PSP) + SKB_EXT_PSP, #endif SKB_EXT_NUM, /* must be last */ };
diff --git a/include/net/inet_timewait_sock.h b/include/net/inet_timewait_sock.h
index 67a313575780..c1295246216c 100644
--- a/include/net/inet_timewait_sock.h
+++ b/include/net/inet_timewait_sock.h@@ -81,6 +81,9 @@ struct inet_timewait_sock { struct timer_list tw_timer; struct inet_bind_bucket *tw_tb; struct inet_bind2_bucket *tw_tb2; +#if IS_ENABLED(CONFIG_INET_PSP) + struct psp_assoc __rcu *psp_assoc; +#endif }; #define tw_tclass tw_tos
diff --git a/include/net/psp/functions.h b/include/net/psp/functions.h
index 074f9df9afc3..d0043bd14299 100644
--- a/include/net/psp/functions.h
+++ b/include/net/psp/functions.h@@ -5,10 +5,16 @@ #include <net/psp/types.h> +struct inet_timewait_sock; + /* Driver-facing API */ struct psp_dev * psp_dev_create(struct net_device *netdev, struct psp_dev_ops *psd_ops, struct psp_dev_caps *psd_caps, void *priv_ptr); void psp_dev_unregister(struct psp_dev *psd); +/* Kernel-facing API */ +static inline void psp_sk_assoc_free(struct sock *sk) { } +static inline void psp_twsk_assoc_free(struct inet_timewait_sock *tw) { } + #endif /* __NET_PSP_HELPERS_H */
diff --git a/include/net/psp/types.h b/include/net/psp/types.h
index dbc5423a53df..ba7e5c36975c 100644
--- a/include/net/psp/types.h
+++ b/include/net/psp/types.h@@ -86,6 +86,13 @@ struct psp_dev_caps { #define PSP_V1_KEY 32 #define PSP_MAX_KEY 32 +struct psp_skb_ext { + __be32 spi; + u16 dev_id; + u8 generation; + u8 version; +}; + /** * struct psp_dev_ops - netdev driver facing PSP callbacks */
diff --git a/include/net/sock.h b/include/net/sock.h
index 0f2443d4ec58..19a898846b08 100644
--- a/include/net/sock.h
+++ b/include/net/sock.h@@ -249,6 +249,7 @@ struct sk_filter; * @sk_dst_cache: destination cache * @sk_dst_pending_confirm: need to confirm neighbour * @sk_policy: flow policy + * @psp_assoc: PSP association, if socket is PSP-secured * @sk_receive_queue: incoming packets * @sk_wmem_alloc: transmit queue bytes committed * @sk_tsq_flags: TCP Small Queues flags
@@ -446,6 +447,9 @@ struct sock { struct mem_cgroup *sk_memcg; #ifdef CONFIG_XFRM struct xfrm_policy __rcu *sk_policy[2]; +#endif +#if IS_ENABLED(CONFIG_INET_PSP) + struct psp_assoc __rcu *psp_assoc; #endif __cacheline_group_end(sock_read_rxtx);
diff --git a/net/core/skbuff.c b/net/core/skbuff.c
index d6420b74ea9c..689f7c6f5744 100644
--- a/net/core/skbuff.c
+++ b/net/core/skbuff.c@@ -79,6 +79,7 @@ #include <net/mptcp.h> #include <net/mctp.h> #include <net/page_pool/helpers.h> +#include <net/psp/types.h> #include <net/dropreason.h> #include <linux/uaccess.h>
@@ -5060,6 +5061,9 @@ static const u8 skb_ext_type_len[] = { #if IS_ENABLED(CONFIG_MCTP_FLOWS) [SKB_EXT_MCTP] = SKB_EXT_CHUNKSIZEOF(struct mctp_flow), #endif +#if IS_ENABLED(CONFIG_INET_PSP) + [SKB_EXT_PSP] = SKB_EXT_CHUNKSIZEOF(struct psp_skb_ext), +#endif }; static __always_inline unsigned int skb_ext_total_length(void)
diff --git a/net/ipv4/af_inet.c b/net/ipv4/af_inet.c
index 76e38092cd8a..e298dacb4a06 100644
--- a/net/ipv4/af_inet.c
+++ b/net/ipv4/af_inet.c@@ -102,6 +102,7 @@ #include <net/gro.h> #include <net/gso.h> #include <net/tcp.h> +#include <net/psp.h> #include <net/udp.h> #include <net/udplite.h> #include <net/ping.h>
@@ -158,6 +159,7 @@ void inet_sock_destruct(struct sock *sk) kfree(rcu_dereference_protected(inet->inet_opt, 1)); dst_release(rcu_dereference_protected(sk->sk_dst_cache, 1)); dst_release(rcu_dereference_protected(sk->sk_rx_dst, 1)); + psp_sk_assoc_free(sk); } EXPORT_SYMBOL(inet_sock_destruct);
diff --git a/net/ipv4/tcp_minisocks.c b/net/ipv4/tcp_minisocks.c
index 43d7852ce07e..d0f49e6e3e35 100644
--- a/net/ipv4/tcp_minisocks.c
+++ b/net/ipv4/tcp_minisocks.c@@ -23,6 +23,7 @@ #include <net/xfrm.h> #include <net/busy_poll.h> #include <net/rstreason.h> +#include <net/psp.h> static bool tcp_in_window(u32 seq, u32 end_seq, u32 s_win, u32 e_win) {
@@ -400,6 +401,7 @@ void tcp_twsk_destructor(struct sock *sk) } #endif tcp_ao_destroy_sock(sk, true); + psp_twsk_assoc_free(inet_twsk(sk)); } EXPORT_IPV6_MOD_GPL(tcp_twsk_destructor);
--
2.47.1