kernel/linux.git/include/net/psp, branch v7.2-rc1

psp: add new netlink cmd for dev-assoc and dev-disassoc

2026-06-13T01:31:32+00:00

The main purpose of this cmd is to be able to associate a non-psp-capable device (e.g. veth or netkit) with a psp device. One use case is if we create a pair of veth/netkit, and assign 1 end inside a netns, while leaving the other end within the default netns, with a real PSP device, e.g. netdevsim or a physical PSP-capable NIC. With this command, we could associate the veth/netkit inside the netns with PSP device, so the virtual device could act as PSP-capable device to initiate PSP connections, and performs PSP encryption/decryption on the real PSP device. Signed-off-by: Wei Wang Reviewed-by: Daniel Zahka Link: https://patch.msgid.link/20260608233118.2694144-3-weibunny.kernel@gmail.com Signed-off-by: Jakub Kicinski

psp: add stats from psp spec to driver facing api

2025-11-08T02:53:57+00:00

Provide a driver api for reporting device statistics required by the "Implementation Requirements" section of the PSP Architecture Specification. Use a warning to ensure drivers report stats required by the spec. Signed-off-by: Daniel Zahka Link: https://patch.msgid.link/20251106002608.1578518-4-daniel.zahka@gmail.com Signed-off-by: Jakub Kicinski

psp: report basic stats from the core

2025-11-08T02:53:56+00:00

Track and report stats common to all psp devices from the core. A 'stale-event' is when the core marks the rx state of an active psp_assoc as incapable of authenticating psp encapsulated data. Signed-off-by: Daniel Zahka Link: https://patch.msgid.link/20251106002608.1578518-2-daniel.zahka@gmail.com Signed-off-by: Jakub Kicinski

net: psp: don't assume reply skbs will have a socket

2025-10-03T17:23:50+00:00

Rx path may be passing around unreferenced sockets, which means that skb_set_owner_edemux() may not set skb->sk and PSP will crash: KASAN: null-ptr-deref in range [0x0000000000000010-0x0000000000000017] RIP: 0010:psp_reply_set_decrypted (./include/net/psp/functions.h:132 net/psp/psp_sock.c:287) tcp_v6_send_response.constprop.0 (net/ipv6/tcp_ipv6.c:979) tcp_v6_send_reset (net/ipv6/tcp_ipv6.c:1140 (discriminator 1)) tcp_v6_do_rcv (net/ipv6/tcp_ipv6.c:1683) tcp_v6_rcv (net/ipv6/tcp_ipv6.c:1912) Fixes: 659a2899a57d ("tcp: add datapath logic for PSP with inline key exchange") Reviewed-by: Kuniyuki Iwashima Reviewed-by: Eric Dumazet Link: https://patch.msgid.link/20251001022426.2592750-1-kuba@kernel.org Signed-off-by: Jakub Kicinski

psp: Fix typo in kdoc for struct psp_dev_caps.assoc_drv_spc.

2025-09-20T00:02:27+00:00

assoc_drv_spc is the size of psp_assoc.drv_data[]. Signed-off-by: Kuniyuki Iwashima Reviewed-by: Simon Horman Link: https://patch.msgid.link/20250918192539.1587586-1-kuniyu@google.com Signed-off-by: Jakub Kicinski

psp: don't use flags for checking sk_state

2025-09-20T00:01:20+00:00

Using flags to check sk_state only makes sense to check for a subset of states in parallel e.g. sk_fullsock(). We are not doing that here. Compare for individual states directly. Signed-off-by: Daniel Zahka Link: https://patch.msgid.link/20250918155205.2197603-4-daniel.zahka@gmail.com Signed-off-by: Jakub Kicinski

psp: fix preemptive inet_twsk() cast in psp_sk_get_assoc_rcu()

2025-09-20T00:01:20+00:00

It is weird to cast to a timewait_sock before checking sk_state, even if the use is after such a check. Remove the tw local variable, and use inet_twsk() directly in the timewait branch. Signed-off-by: Daniel Zahka Link: https://patch.msgid.link/20250918155205.2197603-3-daniel.zahka@gmail.com Signed-off-by: Jakub Kicinski

psp: make struct sock argument const in psp_sk_get_assoc_rcu()

2025-09-20T00:01:20+00:00

This function does not need a mutable reference to its argument. Signed-off-by: Daniel Zahka Link: https://patch.msgid.link/20250918155205.2197603-2-daniel.zahka@gmail.com Signed-off-by: Jakub Kicinski

psp: provide decapsulation and receive helper for drivers

2025-09-18T10:32:07+00:00

Create psp_dev_rcv(), which drivers can call to psp decapsulate and attach a psp_skb_ext to an skb. psp_dev_rcv() only supports what the PSP architecture specification refers to as "transport mode" packets, where the L3 header is either IPv6 or IPv4. Reviewed-by: Willem de Bruijn Signed-off-by: Raed Salem Signed-off-by: Rahul Rameshbabu Signed-off-by: Cosmin Ratiu Co-developed-by: Daniel Zahka Signed-off-by: Daniel Zahka Reviewed-by: Eric Dumazet Link: https://patch.msgid.link/20250917000954.859376-18-daniel.zahka@gmail.com Signed-off-by: Paolo Abeni

psp: provide encapsulation helper for drivers

2025-09-18T10:32:07+00:00

Create a new function psp_encapsulate(), which takes a TCP packet and PSP encapsulates it according to the "Transport Mode Packet Format" section of the PSP Architecture Specification. psp_encapsulate() does not push a PSP trailer onto the skb. Both IPv6 and IPv4 are supported. Virtualization cookie is not included. Reviewed-by: Willem de Bruijn Signed-off-by: Raed Salem Signed-off-by: Rahul Rameshbabu Signed-off-by: Cosmin Ratiu Co-developed-by: Daniel Zahka Signed-off-by: Daniel Zahka Reviewed-by: Eric Dumazet Link: https://patch.msgid.link/20250917000954.859376-14-daniel.zahka@gmail.com Signed-off-by: Paolo Abeni