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/net/tcp_ao.h | 14 ++++++++++++++ include/uapi/linux/tcp.h | 8 ++++++++ 2 files changed, 22 insertions(+) (limited to 'include') diff --git a/include/net/tcp_ao.h b/include/net/tcp_ao.h index edd6748b2cfa..a375a171ef3c 100644 --- a/include/net/tcp_ao.h +++ b/include/net/tcp_ao.h @@ -199,6 +199,8 @@ void tcp_ao_time_wait(struct tcp_timewait_sock *tcptw, struct tcp_sock *tp); bool tcp_ao_ignore_icmp(const struct sock *sk, int family, int type, int code); int tcp_ao_get_mkts(struct sock *sk, sockptr_t optval, sockptr_t optlen); int tcp_ao_get_sock_info(struct sock *sk, sockptr_t optval, sockptr_t optlen); +int tcp_ao_get_repair(struct sock *sk, sockptr_t optval, sockptr_t optlen); +int tcp_ao_set_repair(struct sock *sk, sockptr_t optval, unsigned int optlen); enum skb_drop_reason tcp_inbound_ao_hash(struct sock *sk, const struct sk_buff *skb, unsigned short int family, const struct request_sock *req, int l3index, @@ -330,6 +332,18 @@ static inline int tcp_ao_get_sock_info(struct sock *sk, sockptr_t optval, sockpt { return -ENOPROTOOPT; } + +static inline int tcp_ao_get_repair(struct sock *sk, + sockptr_t optval, sockptr_t optlen) +{ + return -ENOPROTOOPT; +} + +static inline int tcp_ao_set_repair(struct sock *sk, + sockptr_t optval, unsigned int optlen) +{ + return -ENOPROTOOPT; +} #endif #if defined(CONFIG_TCP_MD5SIG) || defined(CONFIG_TCP_AO) 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