Merge branch 'bpf: net: Remove duplicated code from bpf_setsockopt()'

Martin KaFai Lau says:

====================

The code in bpf_setsockopt() is mostly a copy-and-paste from
the sock_setsockopt(), do_tcp_setsockopt(), do_ipv6_setsockopt(),
and do_ip_setsockopt().  As the allowed optnames in bpf_setsockopt()
grows, so are the duplicated code.  The code between the copies
also slowly drifted.

This set is an effort to clean this up and reuse the existing
{sock,do_tcp,do_ipv6,do_ip}_setsockopt() as much as possible.

After the clean up, this set also adds a few allowed optnames
that we need to the bpf_setsockopt().

The initial attempt was to clean up both bpf_setsockopt() and
bpf_getsockopt() together.  However, the patch set was getting
too long.  It is beneficial to leave the bpf_getsockopt()
out for another patch set.  Thus, this set is focusing
on the bpf_setsockopt().

v4:
- This set now depends on the commit f574f7f839fc ("net: bpf: Use the protocol's set_rcvlowat behavior if there is one")
  in the net-next tree.  The commit calls a specific protocol's
  set_rcvlowat and it changed the bpf_setsockopt
  which this set has also changed.

  Because of this, patch 9 of this set has also adjusted
  and a 'sock' NULL check is added to the sk_setsockopt()
  because some of the bpf hooks have a NULL sk->sk_socket.
  This removes more dup code from the bpf_setsockopt() side.
- Avoid mentioning specific prog types in the comment of
  the has_current_bpf_ctx(). (Andrii)
- Replace signed with unsigned int bitfield in the
  patch 15 selftest. (Daniel)

v3:
- s/in_bpf/has_current_bpf_ctx/ (Andrii)
- Add comment to has_current_bpf_ctx() and sockopt_lock_sock()
  (Stanislav)
- Use vmlinux.h in selftest and add defines to bpf_tracing_net.h
  (Stanislav)
- Use bpf_getsockopt(SO_MARK) in selftest (Stanislav)
- Use BPF_CORE_READ_BITFIELD in selftest (Yonghong)

v2:
- A major change is to use in_bpf() to test if a setsockopt()
  is called by a bpf prog and use in_bpf() to skip capable
  check.  Suggested by Stanislav.
- Instead of passing is_locked through sockptr_t or through an extra
  argument to sk_setsockopt, v2 uses in_bpf() to skip the lock_sock()
  also because bpf prog has the lock acquired.
- No change to the current sockptr_t in this revision
- s/codes/code/
====================

Signed-off-by: Alexei Starovoitov <ast@kernel.org>

16 files changed, 874 insertions, 277 deletions

diff --git a/include/linux/bpf.h b/include/linux/bpf.h
index a627a02cf8ab..39bd36359c1e 100644
--- a/include/linux/bpf.h
+++ b/include/linux/bpf.h
@@ -1966,6 +1966,15 @@ static inline bool unprivileged_ebpf_enabled(void)
 	return !sysctl_unprivileged_bpf_disabled;
 }
 
+/* Not all bpf prog type has the bpf_ctx.
+ * For the bpf prog type that has initialized the bpf_ctx,
+ * this function can be used to decide if a kernel function
+ * is called by a bpf program.
+ */
+static inline bool has_current_bpf_ctx(void)
+{
+	return !!current->bpf_ctx;
+}
 #else /* !CONFIG_BPF_SYSCALL */
 static inline struct bpf_prog *bpf_prog_get(u32 ufd)
 {
@@ -2175,6 +2184,10 @@ static inline bool unprivileged_ebpf_enabled(void)
 	return false;
 }
 
+static inline bool has_current_bpf_ctx(void)
+{
+	return false;
+}
 #endif /* CONFIG_BPF_SYSCALL */
 
 void __bpf_free_used_btfs(struct bpf_prog_aux *aux,
diff --git a/include/net/ip.h b/include/net/ip.h
index 1c979fd1904c..34fa5b0f0a0e 100644
--- a/include/net/ip.h
+++ b/include/net/ip.h
@@ -743,6 +743,8 @@ void ip_cmsg_recv_offset(struct msghdr *msg, struct sock *sk,
 int ip_cmsg_send(struct sock *sk, struct msghdr *msg,
 		 struct ipcm_cookie *ipc, bool allow_ipv6);
 DECLARE_STATIC_KEY_FALSE(ip4_min_ttl);
+int do_ip_setsockopt(struct sock *sk, int level, int optname, sockptr_t optval,
+		     unsigned int optlen);
 int ip_setsockopt(struct sock *sk, int level, int optname, sockptr_t optval,
 		  unsigned int optlen);
 int ip_getsockopt(struct sock *sk, int level, int optname, char __user *optval,
diff --git a/include/net/ipv6.h b/include/net/ipv6.h
index de9dcc5652c4..c110d9032083 100644
--- a/include/net/ipv6.h
+++ b/include/net/ipv6.h
@@ -1156,6 +1156,8 @@ struct in6_addr *fl6_update_dst(struct flowi6 *fl6,
  */
 DECLARE_STATIC_KEY_FALSE(ip6_min_hopcount);
 
+int do_ipv6_setsockopt(struct sock *sk, int level, int optname, sockptr_t optval,
+		       unsigned int optlen);
 int ipv6_setsockopt(struct sock *sk, int level, int optname, sockptr_t optval,
 		    unsigned int optlen);
 int ipv6_getsockopt(struct sock *sk, int level, int optname,
diff --git a/include/net/ipv6_stubs.h b/include/net/ipv6_stubs.h
index 45e0339be6fa..8692698b01cf 100644
--- a/include/net/ipv6_stubs.h
+++ b/include/net/ipv6_stubs.h
@@ -81,6 +81,8 @@ struct ipv6_bpf_stub {
 				     const struct in6_addr *daddr, __be16 dport,
 				     int dif, int sdif, struct udp_table *tbl,
 				     struct sk_buff *skb);
+	int (*ipv6_setsockopt)(struct sock *sk, int level, int optname,
+			       sockptr_t optval, unsigned int optlen);
 };
 extern const struct ipv6_bpf_stub *ipv6_bpf_stub __read_mostly;
 
diff --git a/include/net/sock.h b/include/net/sock.h
index 05a1bbdf5805..ee44b424d952 100644
--- a/include/net/sock.h
+++ b/include/net/sock.h
@@ -1749,6 +1749,11 @@ static inline void unlock_sock_fast(struct sock *sk, bool slow)
 	}
 }
 
+void sockopt_lock_sock(struct sock *sk);
+void sockopt_release_sock(struct sock *sk);
+bool sockopt_ns_capable(struct user_namespace *ns, int cap);
+bool sockopt_capable(int cap);
+
 /* Used by processes to "lock" a socket state, so that
  * interrupts and bottom half handlers won't change it
  * from under us. It essentially blocks any incoming
@@ -1823,6 +1828,8 @@ void sock_pfree(struct sk_buff *skb);
 #define sock_edemux sock_efree
 #endif
 
+int sk_setsockopt(struct sock *sk, int level, int optname,
+		  sockptr_t optval, unsigned int optlen);
 int sock_setsockopt(struct socket *sock, int level, int op,
 		    sockptr_t optval, unsigned int optlen);
 
diff --git a/include/net/tcp.h b/include/net/tcp.h
index d10962b9f0d0..c03a50c72f40 100644
--- a/include/net/tcp.h
+++ b/include/net/tcp.h
@@ -405,6 +405,8 @@ __poll_t tcp_poll(struct file *file, struct socket *sock,
 int tcp_getsockopt(struct sock *sk, int level, int optname,
 		   char __user *optval, int __user *optlen);
 bool tcp_bpf_bypass_getsockopt(int level, int optname);
+int do_tcp_setsockopt(struct sock *sk, int level, int optname,
+		      sockptr_t optval, unsigned int optlen);
 int tcp_setsockopt(struct sock *sk, int level, int optname, sockptr_t optval,
 		   unsigned int optlen);
 void tcp_set_keepalive(struct sock *sk, int val);
diff --git a/kernel/bpf/bpf_iter.c b/kernel/bpf/bpf_iter.c
index 97bb57493ed5..5dc307bdeaeb 100644
--- a/kernel/bpf/bpf_iter.c
+++ b/kernel/bpf/bpf_iter.c
@@ -694,19 +694,24 @@ struct bpf_prog *bpf_iter_get_info(struct bpf_iter_meta *meta, bool in_stop)
 
 int bpf_iter_run_prog(struct bpf_prog *prog, void *ctx)
 {
+	struct bpf_run_ctx run_ctx, *old_run_ctx;
 	int ret;
 
 	if (prog->aux->sleepable) {
 		rcu_read_lock_trace();
 		migrate_disable();
 		might_fault();
+		old_run_ctx = bpf_set_run_ctx(&run_ctx);
 		ret = bpf_prog_run(prog, ctx);
+		bpf_reset_run_ctx(old_run_ctx);
 		migrate_enable();
 		rcu_read_unlock_trace();
 	} else {
 		rcu_read_lock();
 		migrate_disable();
+		old_run_ctx = bpf_set_run_ctx(&run_ctx);
 		ret = bpf_prog_run(prog, ctx);
+		bpf_reset_run_ctx(old_run_ctx);
 		migrate_enable();
 		rcu_read_unlock();
 	}
diff --git a/net/core/filter.c b/net/core/filter.c
index e8508aaafd27..1acfaffeaf32 100644
--- a/net/core/filter.c
+++ b/net/core/filter.c
@@ -5013,251 +5013,166 @@ static const struct bpf_func_proto bpf_get_socket_uid_proto = {
 	.arg1_type      = ARG_PTR_TO_CTX,
 };
 
-static int __bpf_setsockopt(struct sock *sk, int level, int optname,
-			    char *optval, int optlen)
+static int sol_socket_setsockopt(struct sock *sk, int optname,
+				 char *optval, int optlen)
+{
+	switch (optname) {
+	case SO_REUSEADDR:
+	case SO_SNDBUF:
+	case SO_RCVBUF:
+	case SO_KEEPALIVE:
+	case SO_PRIORITY:
+	case SO_REUSEPORT:
+	case SO_RCVLOWAT:
+	case SO_MARK:
+	case SO_MAX_PACING_RATE:
+	case SO_BINDTOIFINDEX:
+	case SO_TXREHASH:
+		if (optlen != sizeof(int))
+			return -EINVAL;
+		break;
+	case SO_BINDTODEVICE:
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	return sk_setsockopt(sk, SOL_SOCKET, optname,
+			     KERNEL_SOCKPTR(optval), optlen);
+}
+
+static int bpf_sol_tcp_setsockopt(struct sock *sk, int optname,
+				  char *optval, int optlen)
 {
-	char devname[IFNAMSIZ];
-	int val, valbool;
-	struct net *net;
-	int ifindex;
-	int ret = 0;
+	struct tcp_sock *tp = tcp_sk(sk);
+	unsigned long timeout;
+	int val;
 
-	if (!sk_fullsock(sk))
+	if (optlen != sizeof(int))
 		return -EINVAL;
 
-	if (level == SOL_SOCKET) {
-		if (optlen != sizeof(int) && optname != SO_BINDTODEVICE)
+	val = *(int *)optval;
+
+	/* Only some options are supported */
+	switch (optname) {
+	case TCP_BPF_IW:
+		if (val <= 0 || tp->data_segs_out > tp->syn_data)
 			return -EINVAL;
-		val = *((int *)optval);
-		valbool = val ? 1 : 0;
+		tcp_snd_cwnd_set(tp, val);
+		break;
+	case TCP_BPF_SNDCWND_CLAMP:
+		if (val <= 0)
+			return -EINVAL;
+		tp->snd_cwnd_clamp = val;
+		tp->snd_ssthresh = val;
+		break;
+	case TCP_BPF_DELACK_MAX:
+		timeout = usecs_to_jiffies(val);
+		if (timeout > TCP_DELACK_MAX ||
+		    timeout < TCP_TIMEOUT_MIN)
+			return -EINVAL;
+		inet_csk(sk)->icsk_delack_max = timeout;
+		break;
+	case TCP_BPF_RTO_MIN:
+		timeout = usecs_to_jiffies(val);
+		if (timeout > TCP_RTO_MIN ||
+		    timeout < TCP_TIMEOUT_MIN)
+			return -EINVAL;
+		inet_csk(sk)->icsk_rto_min = timeout;
+		break;
+	default:
+		return -EINVAL;
+	}
 
-		/* Only some socketops are supported */
-		switch (optname) {
-		case SO_RCVBUF:
-			val = min_t(u32, val, sysctl_rmem_max);
-			val = min_t(int, val, INT_MAX / 2);
-			sk->sk_userlocks |= SOCK_RCVBUF_LOCK;
-			WRITE_ONCE(sk->sk_rcvbuf,
-				   max_t(int, val * 2, SOCK_MIN_RCVBUF));
-			break;
-		case SO_SNDBUF:
-			val = min_t(u32, val, sysctl_wmem_max);
-			val = min_t(int, val, INT_MAX / 2);
-			sk->sk_userlocks |= SOCK_SNDBUF_LOCK;
-			WRITE_ONCE(sk->sk_sndbuf,
-				   max_t(int, val * 2, SOCK_MIN_SNDBUF));
-			break;
-		case SO_MAX_PACING_RATE: /* 32bit version */
-			if (val != ~0U)
-				cmpxchg(&sk->sk_pacing_status,
-					SK_PACING_NONE,
-					SK_PACING_NEEDED);
-			sk->sk_max_pacing_rate = (val == ~0U) ?
-						 ~0UL : (unsigned int)val;
-			sk->sk_pacing_rate = min(sk->sk_pacing_rate,
-						 sk->sk_max_pacing_rate);
-			break;
-		case SO_PRIORITY:
-			sk->sk_priority = val;
-			break;
-		case SO_RCVLOWAT:
-			if (val < 0)
-				val = INT_MAX;
-			if (sk->sk_socket && sk->sk_socket->ops->set_rcvlowat)
-				ret = sk->sk_socket->ops->set_rcvlowat(sk, val);
-			else
-				WRITE_ONCE(sk->sk_rcvlowat, val ? : 1);
-			break;
-		case SO_MARK:
-			if (sk->sk_mark != val) {
-				sk->sk_mark = val;
-				sk_dst_reset(sk);
-			}
-			break;
-		case SO_BINDTODEVICE:
-			optlen = min_t(long, optlen, IFNAMSIZ - 1);
-			strncpy(devname, optval, optlen);
-			devname[optlen] = 0;
+	return 0;
+}
 
-			ifindex = 0;
-			if (devname[0] != '\0') {
-				struct net_device *dev;
+static int sol_tcp_setsockopt(struct sock *sk, int optname,
+			      char *optval, int optlen)
+{
+	if (sk->sk_prot->setsockopt != tcp_setsockopt)
+		return -EINVAL;
 
-				ret = -ENODEV;
+	switch (optname) {
+	case TCP_NODELAY:
+	case TCP_MAXSEG:
+	case TCP_KEEPIDLE:
+	case TCP_KEEPINTVL:
+	case TCP_KEEPCNT:
+	case TCP_SYNCNT:
+	case TCP_WINDOW_CLAMP:
+	case TCP_THIN_LINEAR_TIMEOUTS:
+	case TCP_USER_TIMEOUT:
+	case TCP_NOTSENT_LOWAT:
+	case TCP_SAVE_SYN:
+		if (optlen != sizeof(int))
+			return -EINVAL;
+		break;
+	case TCP_CONGESTION:
+		break;
+	default:
+		return bpf_sol_tcp_setsockopt(sk, optname, optval, optlen);
+	}
 
-				net = sock_net(sk);
-				dev = dev_get_by_name(net, devname);
-				if (!dev)
-					break;
-				ifindex = dev->ifindex;
-				dev_put(dev);
-			}
-			fallthrough;
-		case SO_BINDTOIFINDEX:
-			if (optname == SO_BINDTOIFINDEX)
-				ifindex = val;
-			ret = sock_bindtoindex(sk, ifindex, false);
-			break;
-		case SO_KEEPALIVE:
-			if (sk->sk_prot->keepalive)
-				sk->sk_prot->keepalive(sk, valbool);
-			sock_valbool_flag(sk, SOCK_KEEPOPEN, valbool);
-			break;
-		case SO_REUSEPORT:
-			sk->sk_reuseport = valbool;
-			break;
-		case SO_TXREHASH:
-			if (val < -1 || val > 1) {
-				ret = -EINVAL;
-				break;
-			}
-			sk->sk_txrehash = (u8)val;
-			break;
-		default:
-			ret = -EINVAL;
-		}
-#ifdef CONFIG_INET
-	} else if (level == SOL_IP) {
-		if (optlen != sizeof(int) || sk->sk_family != AF_INET)
+	return do_tcp_setsockopt(sk, SOL_TCP, optname,
+				 KERNEL_SOCKPTR(optval), optlen);
+}
+
+static int sol_ip_setsockopt(struct sock *sk, int optname,
+			     char *optval, int optlen)
+{
+	if (sk->sk_family != AF_INET)
+		return -EINVAL;
+
+	switch (optname) {
+	case IP_TOS:
+		if (optlen != sizeof(int))
 			return -EINVAL;
+		break;
+	default:
+		return -EINVAL;
+	}
 
-		val = *((int *)optval);
-		/* Only some options are supported */
-		switch (optname) {
-		case IP_TOS:
-			if (val < -1 || val > 0xff) {
-				ret = -EINVAL;
-			} else {
-				struct inet_sock *inet = inet_sk(sk);
+	return do_ip_setsockopt(sk, SOL_IP, optname,
+				KERNEL_SOCKPTR(optval), optlen);
+}
 
-				if (val == -1)
-					val = 0;
-				inet->tos = val;
-			}
-			break;
-		default:
-			ret = -EINVAL;
-		}
-#if IS_ENABLED(CONFIG_IPV6)
-	} else if (level == SOL_IPV6) {
-		if (optlen != sizeof(int) || sk->sk_family != AF_INET6)
+static int sol_ipv6_setsockopt(struct sock *sk, int optname,
+			       char *optval, int optlen)
+{
+	if (sk->sk_family != AF_INET6)
+		return -EINVAL;
+
+	switch (optname) {
+	case IPV6_TCLASS:
+	case IPV6_AUTOFLOWLABEL:
+		if (optlen != sizeof(int))
 			return -EINVAL;
+		break;
+	default:
+		return -EINVAL;
+	}
 
-		val = *((int *)optval);
-		/* Only some options are supported */
-		switch (optname) {
-		case IPV6_TCLASS:
-			if (val < -1 || val > 0xff) {
-				ret = -EINVAL;
-			} else {
-				struct ipv6_pinfo *np = inet6_sk(sk);
+	return ipv6_bpf_stub->ipv6_setsockopt(sk, SOL_IPV6, optname,
+					      KERNEL_SOCKPTR(optval), optlen);
+}
 
-				if (val == -1)
-					val = 0;
-				np->tclass = val;
-			}
-			break;
-		default:
-			ret = -EINVAL;
-		}
-#endif
-	} else if (level == SOL_TCP &&
-		   sk->sk_prot->setsockopt == tcp_setsockopt) {
-		if (optname == TCP_CONGESTION) {
-			char name[TCP_CA_NAME_MAX];
-
-			strncpy(name, optval, min_t(long, optlen,
-						    TCP_CA_NAME_MAX-1));
-			name[TCP_CA_NAME_MAX-1] = 0;
-			ret = tcp_set_congestion_control(sk, name, false, true);
-		} else {
-			struct inet_connection_sock *icsk = inet_csk(sk);
-			struct tcp_sock *tp = tcp_sk(sk);
-			unsigned long timeout;
+static int __bpf_setsockopt(struct sock *sk, int level, int optname,
+			    char *optval, int optlen)
+{
+	if (!sk_fullsock(sk))
+		return -EINVAL;
 
-			if (optlen != sizeof(int))
-				return -EINVAL;
+	if (level == SOL_SOCKET)
+		return sol_socket_setsockopt(sk, optname, optval, optlen);
+	else if (IS_ENABLED(CONFIG_INET) && level == SOL_IP)
+		return sol_ip_setsockopt(sk, optname, optval, optlen);
+	else if (IS_ENABLED(CONFIG_IPV6) && level == SOL_IPV6)
+		return sol_ipv6_setsockopt(sk, optname, optval, optlen);
+	else if (IS_ENABLED(CONFIG_INET) && level == SOL_TCP)
+		return sol_tcp_setsockopt(sk, optname, optval, optlen);
 
-			val = *((int *)optval);
-			/* Only some options are supported */
-			switch (optname) {
-			case TCP_BPF_IW:
-				if (val <= 0 || tp->data_segs_out > tp->syn_data)
-					ret = -EINVAL;
-				else
-					tcp_snd_cwnd_set(tp, val);
-				break;
-			case TCP_BPF_SNDCWND_CLAMP:
-				if (val <= 0) {
-					ret = -EINVAL;
-				} else {
-					tp->snd_cwnd_clamp = val;
-					tp->snd_ssthresh = val;
-				}
-				break;
-			case TCP_BPF_DELACK_MAX:
-				timeout = usecs_to_jiffies(val);
-				if (timeout > TCP_DELACK_MAX ||
-				    timeout < TCP_TIMEOUT_MIN)
-					return -EINVAL;
-				inet_csk(sk)->icsk_delack_max = timeout;
-				break;
-			case TCP_BPF_RTO_MIN:
-				timeout = usecs_to_jiffies(val);
-				if (timeout > TCP_RTO_MIN ||
-				    timeout < TCP_TIMEOUT_MIN)
-					return -EINVAL;
-				inet_csk(sk)->icsk_rto_min = timeout;
-				break;
-			case TCP_SAVE_SYN:
-				if (val < 0 || val > 1)
-					ret = -EINVAL;
-				else
-					tp->save_syn = val;
-				break;
-			case TCP_KEEPIDLE:
-				ret = tcp_sock_set_keepidle_locked(sk, val);
-				break;
-			case TCP_KEEPINTVL:
-				if (val < 1 || val > MAX_TCP_KEEPINTVL)
-					ret = -EINVAL;
-				else
-					tp->keepalive_intvl = val * HZ;
-				break;
-			case TCP_KEEPCNT:
-				if (val < 1 || val > MAX_TCP_KEEPCNT)
-					ret = -EINVAL;
-				else
-					tp->keepalive_probes = val;
-				break;
-			case TCP_SYNCNT:
-				if (val < 1 || val > MAX_TCP_SYNCNT)
-					ret = -EINVAL;
-				else
-					icsk->icsk_syn_retries = val;
-				break;
-			case TCP_USER_TIMEOUT:
-				if (val < 0)
-					ret = -EINVAL;
-				else
-					icsk->icsk_user_timeout = val;
-				break;
-			case TCP_NOTSENT_LOWAT:
-				tp->notsent_lowat = val;
-				sk->sk_write_space(sk);
-				break;
-			case TCP_WINDOW_CLAMP:
-				ret = tcp_set_window_clamp(sk, val);
-				break;
-			default:
-				ret = -EINVAL;
-			}
-		}
-#endif
-	} else {
-		ret = -EINVAL;
-	}
-	return ret;
+	return -EINVAL;
 }
 
 static int _bpf_setsockopt(struct sock *sk, int level, int optname,
diff --git a/net/core/sock.c b/net/core/sock.c
index 4cb957d934a2..2a6f84702eb9 100644
--- a/net/core/sock.c
+++ b/net/core/sock.c
@@ -703,7 +703,9 @@ static int sock_setbindtodevice(struct sock *sk, sockptr_t optval, int optlen)
 			goto out;
 	}
 
-	return sock_bindtoindex(sk, index, true);
+	sockopt_lock_sock(sk);
+	ret = sock_bindtoindex_locked(sk, index);
+	sockopt_release_sock(sk);
 out:
 #endif
 
@@ -1036,17 +1038,51 @@ static int sock_reserve_memory(struct sock *sk, int bytes)
 	return 0;
 }
 
+void sockopt_lock_sock(struct sock *sk)
+{
+	/* When current->bpf_ctx is set, the setsockopt is called from
+	 * a bpf prog.  bpf has ensured the sk lock has been
+	 * acquired before calling setsockopt().
+	 */
+	if (has_current_bpf_ctx())
+		return;
+
+	lock_sock(sk);
+}
+EXPORT_SYMBOL(sockopt_lock_sock);
+
+void sockopt_release_sock(struct sock *sk)
+{
+	if (has_current_bpf_ctx())
+		return;
+
+	release_sock(sk);
+}
+EXPORT_SYMBOL(sockopt_release_sock);
+
+bool sockopt_ns_capable(struct user_namespace *ns, int cap)
+{
+	return has_current_bpf_ctx() || ns_capable(ns, cap);
+}
+EXPORT_SYMBOL(sockopt_ns_capable);
+
+bool sockopt_capable(int cap)
+{
+	return has_current_bpf_ctx() || capable(cap);
+}
+EXPORT_SYMBOL(sockopt_capable);
+
 /*
  *	This is meant for all protocols to use and covers goings on
  *	at the socket level. Everything here is generic.
  */
 
-int sock_setsockopt(struct socket *sock, int level, int optname,
-		    sockptr_t optval, unsigned int optlen)
+int sk_setsockopt(struct sock *sk, int level, int optname,
+		  sockptr_t optval, unsigned int optlen)
 {
 	struct so_timestamping timestamping;
+	struct socket *sock = sk->sk_socket;
 	struct sock_txtime sk_txtime;
-	struct sock *sk = sock->sk;
 	int val;
 	int valbool;
 	struct linger ling;
@@ -1067,11 +1103,11 @@ int sock_setsockopt(struct socket *sock, int level, int optname,
 
 	valbool = val ? 1 : 0;
 
-	lock_sock(sk);
+	sockopt_lock_sock(sk);
 
 	switch (optname) {
 	case SO_DEBUG:
-		if (val && !capable(CAP_NET_ADMIN))
+		if (val && !sockopt_capable(CAP_NET_ADMIN))
 			ret = -EACCES;
 		else
 			sock_valbool_flag(sk, SOCK_DBG, valbool);
@@ -1115,7 +1151,7 @@ set_sndbuf:
 		break;
 
 	case SO_SNDBUFFORCE:
-		if (!capable(CAP_NET_ADMIN)) {
+		if (!sockopt_capable(CAP_NET_ADMIN)) {
 			ret = -EPERM;
 			break;
 		}
@@ -1137,7 +1173,7 @@ set_sndbuf:
 		break;
 
 	case SO_RCVBUFFORCE:
-		if (!capable(CAP_NET_ADMIN)) {
+		if (!sockopt_capable(CAP_NET_ADMIN)) {
 			ret = -EPERM;
 			break;
 		}
@@ -1164,8 +1200,8 @@ set_sndbuf:
 
 	case SO_PRIORITY:
 		if ((val >= 0 && val <= 6) ||
-		    ns_capable(sock_net(sk)->user_ns, CAP_NET_RAW) ||
-		    ns_capable(sock_net(sk)->user_ns, CAP_NET_ADMIN))
+		    sockopt_ns_capable(sock_net(sk)->user_ns, CAP_NET_RAW) ||
+		    sockopt_ns_capable(sock_net(sk)->user_ns, CAP_NET_ADMIN))
 			sk->sk_priority = val;
 		else
 			ret = -EPERM;
@@ -1228,7 +1264,7 @@ set_sndbuf:
 	case SO_RCVLOWAT:
 		if (val < 0)
 			val = INT_MAX;
-		if (sock->ops->set_rcvlowat)
+		if (sock && sock->ops->set_rcvlowat)
 			ret = sock->ops->set_rcvlowat(sk, val);
 		else
 			WRITE_ONCE(sk->sk_rcvlowat, val ? : 1);
@@ -1310,8 +1346,8 @@ set_sndbuf:
 			clear_bit(SOCK_PASSSEC, &sock->flags);
 		break;
 	case SO_MARK:
-		if (!ns_capable(sock_net(sk)->user_ns, CAP_NET_RAW) &&
-		    !ns_capable(sock_net(sk)->user_ns, CAP_NET_ADMIN)) {
+		if (!sockopt_ns_capable(sock_net(sk)->user_ns, CAP_NET_RAW) &&
+		    !sockopt_ns_capable(sock_net(sk)->user_ns, CAP_NET_ADMIN)) {
 			ret = -EPERM;
 			break;
 		}
@@ -1319,8 +1355,8 @@ set_sndbuf:
 		__sock_set_mark(sk, val);
 		break;
 	case SO_RCVMARK:
-		if (!ns_capable(sock_net(sk)->user_ns, CAP_NET_RAW) &&
-		    !ns_capable(sock_net(sk)->user_ns, CAP_NET_ADMIN)) {
+		if (!sockopt_ns_capable(sock_net(sk)->user_ns, CAP_NET_RAW) &&
+		    !sockopt_ns_capable(sock_net(sk)->user_ns, CAP_NET_ADMIN)) {
 			ret = -EPERM;
 			break;
 		}
@@ -1354,7 +1390,7 @@ set_sndbuf:
 #ifdef CONFIG_NET_RX_BUSY_POLL
 	case SO_BUSY_POLL:
 		/* allow unprivileged users to decrease the value */
-		if ((val > sk->sk_ll_usec) && !capable(CAP_NET_ADMIN))
+		if ((val > sk->sk_ll_usec) && !sockopt_capable(CAP_NET_ADMIN))
 			ret = -EPERM;
 		else {
 			if (val < 0)
@@ -1364,13 +1400,13 @@ set_sndbuf:
 		}
 		break;
 	case SO_PREFER_BUSY_POLL:
-		if (valbool && !capable(CAP_NET_ADMIN))
+		if (valbool && !sockopt_capable(CAP_NET_ADMIN))
 			ret = -EPERM;
 		else
 			WRITE_ONCE(sk->sk_prefer_busy_poll, valbool);
 		break;
 	case SO_BUSY_POLL_BUDGET:
-		if (val > READ_ONCE(sk->sk_busy_poll_budget) && !capable(CAP_NET_ADMIN)) {
+		if (val > READ_ONCE(sk->sk_busy_poll_budget) && !sockopt_capable(CAP_NET_ADMIN)) {
 			ret = -EPERM;
 		} else {
 			if (val < 0 || val > U16_MAX)
@@ -1441,7 +1477,7 @@ set_sndbuf:
 		 * scheduler has enough safe guards.
 		 */
 		if (sk_txtime.clockid != CLOCK_MONOTONIC &&
-		    !ns_capable(sock_net(sk)->user_ns, CAP_NET_ADMIN)) {
+		    !sockopt_ns_capable(sock_net(sk)->user_ns, CAP_NET_ADMIN)) {
 			ret = -EPERM;
 			break;
 		}
@@ -1496,9 +1532,16 @@ set_sndbuf:
 		ret = -ENOPROTOOPT;
 		break;
 	}
-	release_sock(sk);
+	sockopt_release_sock(sk);
 	return ret;
 }
+
+int sock_setsockopt(struct socket *sock, int level, int optname,
+		    sockptr_t optval, unsigned int optlen)
+{
+	return sk_setsockopt(sock->sk, level, optname,
+			     optval, optlen);
+}
 EXPORT_SYMBOL(sock_setsockopt);
 
 static const struct cred *sk_get_peer_cred(struct sock *sk)
diff --git a/net/ipv4/ip_sockglue.c b/net/ipv4/ip_sockglue.c
index a8a323ecbb54..751fa69cb557 100644
--- a/net/ipv4/ip_sockglue.c
+++ b/net/ipv4/ip_sockglue.c
@@ -888,8 +888,8 @@ static int compat_ip_mcast_join_leave(struct sock *sk, int optname,
 
 DEFINE_STATIC_KEY_FALSE(ip4_min_ttl);
 
-static int do_ip_setsockopt(struct sock *sk, int level, int optname,
-		sockptr_t optval, unsigned int optlen)
+int do_ip_setsockopt(struct sock *sk, int level, int optname,
+		     sockptr_t optval, unsigned int optlen)
 {
 	struct inet_sock *inet = inet_sk(sk);
 	struct net *net = sock_net(sk);
@@ -944,7 +944,7 @@ static int do_ip_setsockopt(struct sock *sk, int level, int optname,
 	err = 0;
 	if (needs_rtnl)
 		rtnl_lock();
-	lock_sock(sk);
+	sockopt_lock_sock(sk);
 
 	switch (optname) {
 	case IP_OPTIONS:
@@ -1333,14 +1333,14 @@ static int do_ip_setsockopt(struct sock *sk, int level, int optname,
 	case IP_IPSEC_POLICY:
 	case IP_XFRM_POLICY:
 		err = -EPERM;
-		if (!ns_capable(sock_net(sk)->user_ns, CAP_NET_ADMIN))
+		if (!sockopt_ns_capable(sock_net(sk)->user_ns, CAP_NET_ADMIN))
 			break;
 		err = xfrm_user_policy(sk, optname, optval, optlen);
 		break;
 
 	case IP_TRANSPARENT:
-		if (!!val && !ns_capable(sock_net(sk)->user_ns, CAP_NET_RAW) &&
-		    !ns_capable(sock_net(sk)->user_ns, CAP_NET_ADMIN)) {
+		if (!!val && !sockopt_ns_capable(sock_net(sk)->user_ns, CAP_NET_RAW) &&
+		    !sockopt_ns_capable(sock_net(sk)->user_ns, CAP_NET_ADMIN)) {
 			err = -EPERM;
 			break;
 		}
@@ -1368,13 +1368,13 @@ static int do_ip_setsockopt(struct sock *sk, int level, int optname,
 		err = -ENOPROTOOPT;
 		break;
 	}
-	release_sock(sk);
+	sockopt_release_sock(sk);
 	if (needs_rtnl)
 		rtnl_unlock();
 	return err;
 
 e_inval:
-	release_sock(sk);
+	sockopt_release_sock(sk);
 	if (needs_rtnl)
 		rtnl_unlock();
 	return -EINVAL;
diff --git a/net/ipv4/tcp.c b/net/ipv4/tcp.c
index 970e9a2cca4a..a6986f201f92 100644
--- a/net/ipv4/tcp.c
+++ b/net/ipv4/tcp.c
@@ -3202,7 +3202,7 @@ EXPORT_SYMBOL(tcp_disconnect);
 
 static inline bool tcp_can_repair_sock(const struct sock *sk)
 {
-	return ns_capable(sock_net(sk)->user_ns, CAP_NET_ADMIN) &&
+	return sockopt_ns_capable(sock_net(sk)->user_ns, CAP_NET_ADMIN) &&
 		(sk->sk_state != TCP_LISTEN);
 }
 
@@ -3479,8 +3479,8 @@ int tcp_set_window_clamp(struct sock *sk, int val)
 /*
  *	Socket option code for TCP.
  */
-static int do_tcp_setsockopt(struct sock *sk, int level, int optname,
-		sockptr_t optval, unsigned int optlen)
+int do_tcp_setsockopt(struct sock *sk, int level, int optname,
+		      sockptr_t optval, unsigned int optlen)
 {
 	struct tcp_sock *tp = tcp_sk(sk);
 	struct inet_connection_sock *icsk = inet_csk(sk);
@@ -3502,11 +3502,11 @@ static int do_tcp_setsockopt(struct sock *sk, int level, int optname,
 			return -EFAULT;
 		name[val] = 0;
 
-		lock_sock(sk);
+		sockopt_lock_sock(sk);
 		err = tcp_set_congestion_control(sk, name, true,
-						 ns_capable(sock_net(sk)->user_ns,
-							    CAP_NET_ADMIN));
-		release_sock(sk);
+						 sockopt_ns_capable(sock_net(sk)->user_ns,
+								    CAP_NET_ADMIN));
+		sockopt_release_sock(sk);
 		return err;
 	}
 	case TCP_ULP: {
@@ -3522,9 +3522,9 @@ static int do_tcp_setsockopt(struct sock *sk, int level, int optname,
 			return -EFAULT;
 		name[val] = 0;
 
-		lock_sock(sk);
+		sockopt_lock_sock(sk);
 		err = tcp_set_ulp(sk, name);
-		release_sock(sk);
+		sockopt_release_sock(sk);
 		return err;
 	}
 	case TCP_FASTOPEN_KEY: {
@@ -3557,7 +3557,7 @@ static int do_tcp_setsockopt(struct sock *sk, int level, int optname,
 	if (copy_from_sockptr(&val, optval, sizeof(val)))
 		return -EFAULT;
 
-	lock_sock(sk);
+	sockopt_lock_sock(sk);
 
 	switch (optname) {
 	case TCP_MAXSEG:
@@ -3779,7 +3779,7 @@ static int do_tcp_setsockopt(struct sock *sk, int level, int optname,
 		break;
 	}
 
-	release_sock(sk);
+	sockopt_release_sock(sk);
 	return err;
 }
 
diff --git a/net/ipv6/af_inet6.c b/net/ipv6/af_inet6.c
index 2ce0c44d0081..cadc97852787 100644
--- a/net/ipv6/af_inet6.c
+++ b/net/ipv6/af_inet6.c
@@ -1057,6 +1057,7 @@ static const struct ipv6_stub ipv6_stub_impl = {
 static const struct ipv6_bpf_stub ipv6_bpf_stub_impl = {
 	.inet6_bind = __inet6_bind,
 	.udp6_lib_lookup = __udp6_lib_lookup,
+	.ipv6_setsockopt = do_ipv6_setsockopt,
 };
 
 static int __init inet6_init(void)
diff --git a/net/ipv6/ipv6_sockglue.c b/net/ipv6/ipv6_sockglue.c
index 222f6bf220ba..a4535bdbd310 100644
--- a/net/ipv6/ipv6_sockglue.c
+++ b/net/ipv6/ipv6_sockglue.c
@@ -327,7 +327,7 @@ static int ipv6_set_opt_hdr(struct sock *sk, int optname, sockptr_t optval,
 	int err;
 
 	/* hop-by-hop / destination options are privileged option */
-	if (optname != IPV6_RTHDR && !ns_capable(net->user_ns, CAP_NET_RAW))
+	if (optname != IPV6_RTHDR && !sockopt_ns_capable(net->user_ns, CAP_NET_RAW))
 		return -EPERM;
 
 	/* remove any sticky options header with a zero option
@@ -391,8 +391,8 @@ sticky_done:
 	return err;
 }
 
-static int do_ipv6_setsockopt(struct sock *sk, int level, int optname,
-		   sockptr_t optval, unsigned int optlen)
+int do_ipv6_setsockopt(struct sock *sk, int level, int optname,
+		       sockptr_t optval, unsigned int optlen)
 {
 	struct ipv6_pinfo *np = inet6_sk(sk);
 	struct net *net = sock_net(sk);
@@ -417,7 +417,7 @@ static int do_ipv6_setsockopt(struct sock *sk, int level, int optname,
 
 	if (needs_rtnl)
 		rtnl_lock();
-	lock_sock(sk);
+	sockopt_lock_sock(sk);
 
 	switch (optname) {
 
@@ -634,8 +634,8 @@ static int do_ipv6_setsockopt(struct sock *sk, int level, int optname,
 		break;
 
 	case IPV6_TRANSPARENT:
-		if (valbool && !ns_capable(net->user_ns, CAP_NET_RAW) &&
-		    !ns_capable(net->user_ns, CAP_NET_ADMIN)) {
+		if (valbool && !sockopt_ns_capable(net->user_ns, CAP_NET_RAW) &&
+		    !sockopt_ns_capable(net->user_ns, CAP_NET_ADMIN)) {
 			retv = -EPERM;
 			break;
 		}
@@ -946,7 +946,7 @@ done:
 	case IPV6_IPSEC_POLICY:
 	case IPV6_XFRM_POLICY:
 		retv = -EPERM;
-		if (!ns_capable(net->user_ns, CAP_NET_ADMIN))
+		if (!sockopt_ns_capable(net->user_ns, CAP_NET_ADMIN))
 			break;
 		retv = xfrm_user_policy(sk, optname, optval, optlen);
 		break;
@@ -994,14 +994,14 @@ done:
 		break;
 	}
 
-	release_sock(sk);
+	sockopt_release_sock(sk);
 	if (needs_rtnl)
 		rtnl_unlock();
 
 	return retv;
 
 e_inval:
-	release_sock(sk);
+	sockopt_release_sock(sk);
 	if (needs_rtnl)
 		rtnl_unlock();
 	return -EINVAL;
diff --git a/tools/testing/selftests/bpf/prog_tests/setget_sockopt.c b/tools/testing/selftests/bpf/prog_tests/setget_sockopt.c
new file mode 100644
index 000000000000..018611e6b248
--- /dev/null
+++ b/tools/testing/selftests/bpf/prog_tests/setget_sockopt.c
@@ -0,0 +1,125 @@
+// SPDX-License-Identifier: GPL-2.0
+/* Copyright (c) Meta Platforms, Inc. and affiliates. */
+
+#define _GNU_SOURCE
+#include <sched.h>
+#include <linux/socket.h>
+#include <net/if.h>
+
+#include "test_progs.h"
+#include "cgroup_helpers.h"
+#include "network_helpers.h"
+
+#include "setget_sockopt.skel.h"
+
+#define CG_NAME "/setget-sockopt-test"
+
+static const char addr4_str[] = "127.0.0.1";
+static const char addr6_str[] = "::1";
+static struct setget_sockopt *skel;
+static int cg_fd;
+
+static int create_netns(void)
+{
+	if (!ASSERT_OK(unshare(CLONE_NEWNET), "create netns"))
+		return -1;
+
+	if (!ASSERT_OK(system("ip link set dev lo up"), "set lo up"))
+		return -1;
+
+	if (!ASSERT_OK(system("ip link add dev binddevtest1 type veth peer name binddevtest2"),
+		       "add veth"))
+		return -1;
+
+	if (!ASSERT_OK(system("ip link set dev binddevtest1 up"),
+		       "bring veth up"))
+		return -1;
+
+	return 0;
+}
+
+static void test_tcp(int family)
+{
+	struct setget_sockopt__bss *bss = skel->bss;
+	int sfd, cfd;
+
+	memset(bss, 0, sizeof(*bss));
+
+	sfd = start_server(family, SOCK_STREAM,
+			   family == AF_INET6 ? addr6_str : addr4_str, 0, 0);
+	if (!ASSERT_GE(sfd, 0, "start_server"))
+		return;
+
+	cfd = connect_to_fd(sfd, 0);
+	if (!ASSERT_GE(cfd, 0, "connect_to_fd_server")) {
+		close(sfd);
+		return;
+	}
+	close(sfd);
+	close(cfd);
+
+	ASSERT_EQ(bss->nr_listen, 1, "nr_listen");
+	ASSERT_EQ(bss->nr_connect, 1, "nr_connect");
+	ASSERT_EQ(bss->nr_active, 1, "nr_active");
+	ASSERT_EQ(bss->nr_passive, 1, "nr_passive");
+	ASSERT_EQ(bss->nr_socket_post_create, 2, "nr_socket_post_create");
+	ASSERT_EQ(bss->nr_binddev, 2, "nr_bind");
+}
+
+static void test_udp(int family)
+{
+	struct setget_sockopt__bss *bss = skel->bss;
+	int sfd;
+
+	memset(bss, 0, sizeof(*bss));
+
+	sfd = start_server(family, SOCK_DGRAM,
+			   family == AF_INET6 ? addr6_str : addr4_str, 0, 0);
+	if (!ASSERT_GE(sfd, 0, "start_server"))
+		return;
+	close(sfd);
+
+	ASSERT_GE(bss->nr_socket_post_create, 1, "nr_socket_post_create");
+	ASSERT_EQ(bss->nr_binddev, 1, "nr_bind");
+}
+
+void test_setget_sockopt(void)
+{
+	cg_fd = test__join_cgroup(CG_NAME);
+	if (cg_fd < 0)
+		return;
+
+	if (create_netns())
+		goto done;
+
+	skel = setget_sockopt__open();
+	if (!ASSERT_OK_PTR(skel, "open skel"))
+		goto done;
+
+	strcpy(skel->rodata->veth, "binddevtest1");
+	skel->rodata->veth_ifindex = if_nametoindex("binddevtest1");
+	if (!ASSERT_GT(skel->rodata->veth_ifindex, 0, "if_nametoindex"))
+		goto done;
+
+	if (!ASSERT_OK(setget_sockopt__load(skel), "load skel"))
+		goto done;
+
+	skel->links.skops_sockopt =
+		bpf_program__attach_cgroup(skel->progs.skops_sockopt, cg_fd);
+	if (!ASSERT_OK_PTR(skel->links.skops_sockopt, "attach cgroup"))
+		goto done;
+
+	skel->links.socket_post_create =
+		bpf_program__attach_cgroup(skel->progs.socket_post_create, cg_fd);
+	if (!ASSERT_OK_PTR(skel->links.socket_post_create, "attach_cgroup"))
+		goto done;
+
+	test_tcp(AF_INET6);
+	test_tcp(AF_INET);
+	test_udp(AF_INET6);
+	test_udp(AF_INET);
+
+done:
+	setget_sockopt__destroy(skel);
+	close(cg_fd);
+}
diff --git a/tools/testing/selftests/bpf/progs/bpf_tracing_net.h b/tools/testing/selftests/bpf/progs/bpf_tracing_net.h
index 98dd2c4815f0..5ebc6dabef84 100644
--- a/tools/testing/selftests/bpf/progs/bpf_tracing_net.h
+++ b/tools/testing/selftests/bpf/progs/bpf_tracing_net.h
@@ -6,13 +6,40 @@
 #define AF_INET6		10
 
 #define SOL_SOCKET		1
+#define SO_REUSEADDR		2
 #define SO_SNDBUF		7
-#define __SO_ACCEPTCON		(1 << 16)
+#define SO_RCVBUF		8
+#define SO_KEEPALIVE		9
 #define SO_PRIORITY		12
+#define SO_REUSEPORT		15
+#define SO_RCVLOWAT		18
+#define SO_BINDTODEVICE		25
+#define SO_MARK			36
+#define SO_MAX_PACING_RATE	47
+#define SO_BINDTOIFINDEX	62
+#define SO_TXREHASH		74
+#define __SO_ACCEPTCON		(1 << 16)
+
+#define IP_TOS			1
+
+#define IPV6_TCLASS		67
+#define IPV6_AUTOFLOWLABEL	70
 
 #define SOL_TCP			6
+#define TCP_NODELAY		1
+#define TCP_MAXSEG		2
+#define TCP_KEEPIDLE		4
+#define TCP_KEEPINTVL		5
+#define TCP_KEEPCNT		6
+#define TCP_SYNCNT		7
+#define TCP_WINDOW_CLAMP	10
 #define TCP_CONGESTION		13
+#define TCP_THIN_LINEAR_TIMEOUTS	16
+#define TCP_USER_TIMEOUT	18
+#define TCP_NOTSENT_LOWAT	25
+#define TCP_SAVE_SYN		27
 #define TCP_CA_NAME_MAX		16
+#define TCP_NAGLE_OFF		1
 
 #define ICSK_TIME_RETRANS	1
 #define ICSK_TIME_PROBE0	3
@@ -49,6 +76,8 @@
 #define sk_state		__sk_common.skc_state
 #define sk_v6_daddr		__sk_common.skc_v6_daddr
 #define sk_v6_rcv_saddr		__sk_common.skc_v6_rcv_saddr
+#define sk_flags		__sk_common.skc_flags
+#define sk_reuse		__sk_common.skc_reuse
 
 #define s6_addr32		in6_u.u6_addr32
 
diff --git a/tools/testing/selftests/bpf/progs/setget_sockopt.c b/tools/testing/selftests/bpf/progs/setget_sockopt.c
new file mode 100644
index 000000000000..4a4cb44a4a15
--- /dev/null
+++ b/tools/testing/selftests/bpf/progs/setget_sockopt.c
@@ -0,0 +1,451 @@
+// SPDX-License-Identifier: GPL-2.0
+/* Copyright (c) Meta Platforms, Inc. and affiliates. */
+
+#include "vmlinux.h"
+#include "bpf_tracing_net.h"
+#include <bpf/bpf_core_read.h>
+#include <bpf/bpf_helpers.h>
+#include <bpf/bpf_tracing.h>
+
+#ifndef ARRAY_SIZE
+#define ARRAY_SIZE(x) (sizeof(x) / sizeof((x)[0]))
+#endif
+
+extern unsigned long CONFIG_HZ __kconfig;
+
+const volatile char veth[IFNAMSIZ];
+const volatile int veth_ifindex;
+
+int nr_listen;
+int nr_passive;
+int nr_active;
+int nr_connect;
+int nr_binddev;
+int nr_socket_post_create;
+
+struct sockopt_test {
+	int opt;
+	int new;
+	int restore;
+	int expected;
+	int tcp_expected;
+	unsigned int flip:1;
+};
+
+static const char cubic_cc[] = "cubic";
+static const char reno_cc[] = "reno";
+
+static const struct sockopt_test sol_socket_tests[] = {
+	{ .opt = SO_REUSEADDR, .flip = 1, },
+	{ .opt = SO_SNDBUF, .new = 8123, .expected = 8123 * 2, },
+	{ .opt = SO_RCVBUF, .new = 8123, .expected = 8123 * 2, },
+	{ .opt = SO_KEEPALIVE, .flip = 1, },
+	{ .opt = SO_PRIORITY, .new = 0xeb9f, .expected = 0xeb9f, },
+	{ .opt = SO_REUSEPORT, .flip = 1, },
+	{ .opt = SO_RCVLOWAT, .new = 8123, .expected = 8123, },
+	{ .opt = SO_MARK, .new = 0xeb9f, .expected = 0xeb9f, },
+	{ .opt = SO_MAX_PACING_RATE, .new = 0xeb9f, .expected = 0xeb9f, },
+	{ .opt = SO_TXREHASH, .flip = 1, },
+	{ .opt = 0, },
+};
+
+static const struct sockopt_test sol_tcp_tests[] = {
+	{ .opt = TCP_NODELAY, .flip = 1, },
+	{ .opt = TCP_MAXSEG, .new = 1314, .expected = 1314, },
+	{ .opt = TCP_KEEPIDLE, .new = 123, .expected = 123, .restore = 321, },
+	{ .opt = TCP_KEEPINTVL, .new = 123, .expected = 123, .restore = 321, },
+	{ .opt = TCP_KEEPCNT, .new = 123, .expected = 123, .restore = 124, },
+	{ .opt = TCP_SYNCNT, .new = 123, .expected = 123, .restore = 124, },
+	{ .opt = TCP_WINDOW_CLAMP, .new = 8123, .expected = 8123, .restore = 8124, },
+	{ .opt = TCP_CONGESTION, },
+	{ .opt = TCP_THIN_LINEAR_TIMEOUTS, .flip = 1, },
+	{ .opt = TCP_USER_TIMEOUT, .new = 123400, .expected = 123400, },
+	{ .opt = TCP_NOTSENT_LOWAT, .new = 1314, .expected = 1314, },
+	{ .opt = TCP_SAVE_SYN, .new = 1, .expected = 1, },
+	{ .opt = 0, },
+};
+
+static const struct sockopt_test sol_ip_tests[] = {
+	{ .opt = IP_TOS, .new = 0xe1, .expected = 0xe1, .tcp_expected = 0xe0, },
+	{ .opt = 0, },
+};
+
+static const struct sockopt_test sol_ipv6_tests[] = {
+	{ .opt = IPV6_TCLASS, .new = 0xe1, .expected = 0xe1, .tcp_expected = 0xe0, },
+	{ .opt = IPV6_AUTOFLOWLABEL, .flip = 1, },
+	{ .opt = 0, },
+};
+
+struct loop_ctx {
+	void *ctx;
+	struct sock *sk;
+};
+
+static int __bpf_getsockopt(void *ctx, struct sock *sk,
+			    int level, int opt, int *optval,
+			    int optlen)
+{
+	if (level == SOL_SOCKET) {
+		switch (opt) {
+		case SO_REUSEADDR:
+			*optval = !!BPF_CORE_READ_BITFIELD(sk, sk_reuse);
+			break;
+		case SO_KEEPALIVE:
+			*optval = !!(sk->sk_flags & (1UL << 3));
+			break;
+		case SO_RCVLOWAT:
+			*optval = sk->sk_rcvlowat;
+			break;
+		case SO_MAX_PACING_RATE:
+			*optval = sk->sk_max_pacing_rate;
+			break;
+		default:
+			return bpf_getsockopt(ctx, level, opt, optval, optlen);
+		}
+		return 0;
+	}
+
+	if (level == IPPROTO_TCP) {
+		struct tcp_sock *tp = bpf_skc_to_tcp_sock(sk);
+
+		if (!tp)
+			return -1;
+
+		switch (opt) {
+		case TCP_NODELAY:
+			*optval = !!(BPF_CORE_READ_BITFIELD(tp, nonagle) & TCP_NAGLE_OFF);
+			break;
+		case TCP_MAXSEG:
+			*optval = tp->rx_opt.user_mss;
+			break;
+		case TCP_KEEPIDLE:
+			*optval = tp->keepalive_time / CONFIG_HZ;
+			break;
+		case TCP_SYNCNT:
+			*optval = tp->inet_conn.icsk_syn_retries;
+			break;
+		case TCP_KEEPINTVL:
+			*optval = tp->keepalive_intvl / CONFIG_HZ;
+			break;
+		case TCP_KEEPCNT:
+			*optval = tp->keepalive_probes;
+			break;
+		case TCP_WINDOW_CLAMP:
+			*optval = tp->window_clamp;
+			break;
+		case TCP_THIN_LINEAR_TIMEOUTS:
+			*optval = !!BPF_CORE_READ_BITFIELD(tp, thin_lto);
+			break;
+		case TCP_USER_TIMEOUT:
+			*optval = tp->inet_conn.icsk_user_timeout;
+			break;
+		case TCP_NOTSENT_LOWAT:
+			*optval = tp->notsent_lowat;
+			break;
+		case TCP_SAVE_SYN:
+			*optval = BPF_CORE_READ_BITFIELD(tp, save_syn);
+			break;
+		default:
+			return bpf_getsockopt(ctx, level, opt, optval, optlen);
+		}
+		return 0;
+	}
+
+	if (level == IPPROTO_IPV6) {
+		switch (opt) {
+		case IPV6_AUTOFLOWLABEL: {
+			__u16 proto = sk->sk_protocol;
+			struct inet_sock *inet_sk;
+
+			if (proto == IPPROTO_TCP)
+				inet_sk = (struct inet_sock *)bpf_skc_to_tcp_sock(sk);
+			else
+				inet_sk = (struct inet_sock *)bpf_skc_to_udp6_sock(sk);
+
+			if (!inet_sk)
+				return -1;
+
+			*optval = !!inet_sk->pinet6->autoflowlabel;
+			break;
+		}
+		default:
+			return bpf_getsockopt(ctx, level, opt, optval, optlen);
+		}
+		return 0;
+	}
+
+	return bpf_getsockopt(ctx, level, opt, optval, optlen);
+}
+
+static int bpf_test_sockopt_flip(void *ctx, struct sock *sk,
+				 const struct sockopt_test *t,
+				 int level)
+{
+	int old, tmp, new, opt = t->opt;
+
+	opt = t->opt;
+
+	if (__bpf_getsockopt(ctx, sk, level, opt, &old, sizeof(old)))
+		return 1;
+	/* kernel initialized txrehash to 255 */
+	if (level == SOL_SOCKET && opt == SO_TXREHASH && old != 0 && old != 1)
+		old = 1;
+
+	new = !old;
+	if (bpf_setsockopt(ctx, level, opt, &new, sizeof(new)))
+		return 1;
+	if (__bpf_getsockopt(ctx, sk, level, opt, &tmp, sizeof(tmp)) ||
+	    tmp != new)
+		return 1;
+
+	if (bpf_setsockopt(ctx, level, opt, &old, sizeof(old)))
+		return 1;
+
+	return 0;
+}
+
+static int bpf_test_sockopt_int(void *ctx, struct sock *sk,
+				const struct sockopt_test *t,
+				int level)
+{
+	int old, tmp, new, expected, opt;
+
+	opt = t->opt;
+	new = t->new;
+	if (sk->sk_type == SOCK_STREAM && t->tcp_expected)
+		expected = t->tcp_expected;
+	else
+		expected = t->expected;
+
+	if (__bpf_getsockopt(ctx, sk, level, opt, &old, sizeof(old)) ||
+	    old == new)
+		return 1;
+
+	if (bpf_setsockopt(ctx, level, opt, &new, sizeof(new)))
+		return 1;
+	if (__bpf_getsockopt(ctx, sk, level, opt, &tmp, sizeof(tmp)) ||
+	    tmp != expected)
+		return 1;
+
+	if (t->restore)
+		old = t->restore;
+	if (bpf_setsockopt(ctx, level, opt, &old, sizeof(old)))
+		return 1;
+
+	return 0;
+}
+
+static int bpf_test_socket_sockopt(__u32 i, struct loop_ctx *lc)
+{
+	const struct sockopt_test *t;
+
+	if (i >= ARRAY_SIZE(sol_socket_tests))
+		return 1;
+
+	t = &sol_socket_tests[i];
+	if (!t->opt)
+		return 1;
+
+	if (t->flip)
+		return bpf_test_sockopt_flip(lc->ctx, lc->sk, t, SOL_SOCKET);
+
+	return bpf_test_sockopt_int(lc->ctx, lc->sk, t, SOL_SOCKET);
+}
+
+static int bpf_test_ip_sockopt(__u32 i, struct loop_ctx *lc)
+{
+	const struct sockopt_test *t;
+
+	if (i >= ARRAY_SIZE(sol_ip_tests))
+		return 1;
+
+	t = &sol_ip_tests[i];
+	if (!t->opt)
+		return 1;
+
+	if (t->flip)
+		return bpf_test_sockopt_flip(lc->ctx, lc->sk, t, IPPROTO_IP);
+
+	return bpf_test_sockopt_int(lc->ctx, lc->sk, t, IPPROTO_IP);
+}
+
+static int bpf_test_ipv6_sockopt(__u32 i, struct loop_ctx *lc)
+{
+	const struct sockopt_test *t;
+
+	if (i >= ARRAY_SIZE(sol_ipv6_tests))
+		return 1;
+
+	t = &sol_ipv6_tests[i];
+	if (!t->opt)
+		return 1;
+
+	if (t->flip)
+		return bpf_test_sockopt_flip(lc->ctx, lc->sk, t, IPPROTO_IPV6);
+
+	return bpf_test_sockopt_int(lc->ctx, lc->sk, t, IPPROTO_IPV6);
+}
+
+static int bpf_test_tcp_sockopt(__u32 i, struct loop_ctx *lc)
+{
+	const struct sockopt_test *t;
+	struct sock *sk;
+	void *ctx;
+
+	if (i >= ARRAY_SIZE(sol_tcp_tests))
+		return 1;
+
+	t = &sol_tcp_tests[i];
+	if (!t->opt)
+		return 1;
+
+	ctx = lc->ctx;
+	sk = lc->sk;
+
+	if (t->opt == TCP_CONGESTION) {
+		char old_cc[16], tmp_cc[16];
+		const char *new_cc;
+
+		if (bpf_getsockopt(ctx, IPPROTO_TCP, TCP_CONGESTION, old_cc, sizeof(old_cc)))
+			return 1;
+		if (!bpf_strncmp(old_cc, sizeof(old_cc), cubic_cc))
+			new_cc = reno_cc;
+		else
+			new_cc = cubic_cc;
+		if (bpf_setsockopt(ctx, IPPROTO_TCP, TCP_CONGESTION, (void *)new_cc,
+				   sizeof(new_cc)))
+			return 1;
+		if (bpf_getsockopt(ctx, IPPROTO_TCP, TCP_CONGESTION, tmp_cc, sizeof(tmp_cc)))
+			return 1;
+		if (bpf_strncmp(tmp_cc, sizeof(tmp_cc), new_cc))
+			return 1;
+		if (bpf_setsockopt(ctx, IPPROTO_TCP, TCP_CONGESTION, old_cc, sizeof(old_cc)))
+			return 1;
+		return 0;
+	}
+
+	if (t->flip)
+		return bpf_test_sockopt_flip(ctx, sk, t, IPPROTO_TCP);
+
+	return bpf_test_sockopt_int(ctx, sk, t, IPPROTO_TCP);
+}
+
+static int bpf_test_sockopt(void *ctx, struct sock *sk)
+{
+	struct loop_ctx lc = { .ctx = ctx, .sk = sk, };
+	__u16 family, proto;
+	int n;
+
+	family = sk->sk_family;
+	proto = sk->sk_protocol;
+
+	n = bpf_loop(ARRAY_SIZE(sol_socket_tests), bpf_test_socket_sockopt, &lc, 0);
+	if (n != ARRAY_SIZE(sol_socket_tests))
+		return -1;
+
+	if (proto == IPPROTO_TCP) {
+		n = bpf_loop(ARRAY_SIZE(sol_tcp_tests), bpf_test_tcp_sockopt, &lc, 0);
+		if (n != ARRAY_SIZE(sol_tcp_tests))
+			return -1;
+	}
+
+	if (family == AF_INET) {
+		n = bpf_loop(ARRAY_SIZE(sol_ip_tests), bpf_test_ip_sockopt, &lc, 0);
+		if (n != ARRAY_SIZE(sol_ip_tests))
+			return -1;
+	} else {
+		n = bpf_loop(ARRAY_SIZE(sol_ipv6_tests), bpf_test_ipv6_sockopt, &lc, 0);
+		if (n != ARRAY_SIZE(sol_ipv6_tests))
+			return -1;
+	}
+
+	return 0;
+}
+
+static int binddev_test(void *ctx)
+{
+	const char empty_ifname[] = "";
+	int ifindex, zero = 0;
+
+	if (bpf_setsockopt(ctx, SOL_SOCKET, SO_BINDTODEVICE,
+			   (void *)veth, sizeof(veth)))
+		return -1;
+	if (bpf_getsockopt(ctx, SOL_SOCKET, SO_BINDTOIFINDEX,
+			   &ifindex, sizeof(int)) ||
+	    ifindex != veth_ifindex)
+		return -1;
+
+	if (bpf_setsockopt(ctx, SOL_SOCKET, SO_BINDTODEVICE,
+			   (void *)empty_ifname, sizeof(empty_ifname)))
+		return -1;
+	if (bpf_getsockopt(ctx, SOL_SOCKET, SO_BINDTOIFINDEX,
+			   &ifindex, sizeof(int)) ||
+	    ifindex != 0)
+		return -1;
+
+	if (bpf_setsockopt(ctx, SOL_SOCKET, SO_BINDTOIFINDEX,
+			   (void *)&veth_ifindex, sizeof(int)))
+		return -1;
+	if (bpf_getsockopt(ctx, SOL_SOCKET, SO_BINDTOIFINDEX,
+			   &ifindex, sizeof(int)) ||
+	    ifindex != veth_ifindex)
+		return -1;
+
+	if (bpf_setsockopt(ctx, SOL_SOCKET, SO_BINDTOIFINDEX,
+			   &zero, sizeof(int)))
+		return -1;
+	if (bpf_getsockopt(ctx, SOL_SOCKET, SO_BINDTOIFINDEX,
+			   &ifindex, sizeof(int)) ||
+	    ifindex != 0)
+		return -1;
+
+	return 0;
+}
+
+SEC("lsm_cgroup/socket_post_create")
+int BPF_PROG(socket_post_create, struct socket *sock, int family,
+	     int type, int protocol, int kern)
+{
+	struct sock *sk = sock->sk;
+
+	if (!sk)
+		return 1;
+
+	nr_socket_post_create += !bpf_test_sockopt(sk, sk);
+	nr_binddev += !binddev_test(sk);
+
+	return 1;
+}
+
+SEC("sockops")
+int skops_sockopt(struct bpf_sock_ops *skops)
+{
+	struct bpf_sock *bpf_sk = skops->sk;
+	struct sock *sk;
+
+	if (!bpf_sk)
+		return 1;
+
+	sk = (struct sock *)bpf_skc_to_tcp_sock(bpf_sk);
+	if (!sk)
+		return 1;
+
+	switch (skops->op) {
+	case BPF_SOCK_OPS_TCP_LISTEN_CB:
+		nr_listen += !bpf_test_sockopt(skops, sk);
+		break;
+	case BPF_SOCK_OPS_TCP_CONNECT_CB:
+		nr_connect += !bpf_test_sockopt(skops, sk);
+		break;
+	case BPF_SOCK_OPS_ACTIVE_ESTABLISHED_CB:
+		nr_active += !bpf_test_sockopt(skops, sk);
+		break;
+	case BPF_SOCK_OPS_PASSIVE_ESTABLISHED_CB:
+		nr_passive += !bpf_test_sockopt(skops, sk);
+		break;
+	}
+
+	return 1;
+}
+
+char _license[] SEC("license") = "GPL";