From faadfaba5e018ca0f9595f17115ff48416b7b85e Mon Sep 17 00:00:00 2001 From: Dmitry Safonov Date: Mon, 23 Oct 2023 20:22:14 +0100 Subject: net/tcp: Add TCP_AO_REPAIR Add TCP_AO_REPAIR setsockopt(), getsockopt(). They let a user to repair TCP-AO ISNs/SNEs. Also let the user hack around when (tp->repair) is on and add ao_info on a socket in any supported state. As SNEs now can be read/written at any moment, use WRITE_ONCE()/READ_ONCE() to set/read them. Signed-off-by: Dmitry Safonov Acked-by: David Ahern Signed-off-by: David S. Miller --- include/uapi/linux/tcp.h | 8 ++++++++ 1 file changed, 8 insertions(+) (limited to 'include/uapi') diff --git a/include/uapi/linux/tcp.h b/include/uapi/linux/tcp.h index be34d7c5c531..c07e9f90c084 100644 --- a/include/uapi/linux/tcp.h +++ b/include/uapi/linux/tcp.h @@ -133,6 +133,7 @@ enum { #define TCP_AO_DEL_KEY 39 /* Delete MKT */ #define TCP_AO_INFO 40 /* Set/list TCP-AO per-socket options */ #define TCP_AO_GET_KEYS 41 /* List MKT(s) */ +#define TCP_AO_REPAIR 42 /* Get/Set SNEs and ISNs */ #define TCP_REPAIR_ON 1 #define TCP_REPAIR_OFF 0 @@ -458,6 +459,13 @@ struct tcp_ao_getsockopt { /* getsockopt(TCP_AO_GET_KEYS) */ __u64 pkt_bad; /* out: segments that failed verification */ } __attribute__((aligned(8))); +struct tcp_ao_repair { /* {s,g}etsockopt(TCP_AO_REPAIR) */ + __be32 snt_isn; + __be32 rcv_isn; + __u32 snd_sne; + __u32 rcv_sne; +} __attribute__((aligned(8))); + /* setsockopt(fd, IPPROTO_TCP, TCP_ZEROCOPY_RECEIVE, ...) */ #define TCP_RECEIVE_ZEROCOPY_FLAG_TLB_CLEAN_HINT 0x1 -- cgit v1.2.3