Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next into net-accept-more

* git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next: (1557 commits)
  net: qede: use extack in qede_parse_actions()
  net: qede: propagate extack through qede_flow_spec_validate()
  net: qede: use faked extack in qede_flow_spec_to_rule()
  net: qede: use extack in qede_parse_flow_attr()
  net: qede: add extack in qede_add_tc_flower_fltr()
  net: qede: use extack in qede_flow_parse_udp_v4()
  net: qede: use extack in qede_flow_parse_udp_v6()
  net: qede: use extack in qede_flow_parse_tcp_v4()
  net: qede: use extack in qede_flow_parse_tcp_v6()
  net: qede: use extack in qede_flow_parse_v4_common()
  net: qede: use extack in qede_flow_parse_v6_common()
  net: qede: use extack in qede_set_v4_tuple_to_profile()
  net: qede: use extack in qede_set_v6_tuple_to_profile()
  net: qede: use extack in qede_flow_parse_ports()
  net: usb: smsc95xx: stop lying about skb->truesize
  net: dsa: microchip: Fix spellig mistake "configur" -> "configure"
  af_unix: Add dead flag to struct scm_fp_list.
  net: ethernet: adi: adin1110: Replace linux/gpio.h by proper one
  octeontx2-pf: Reuse Transmit queue/Send queue index of HTB class
  gve: Use ethtool_sprintf/puts() to fill stats strings
  ...

1 files changed, 83 insertions, 0 deletions

diff --git a/include/net/proto_memory.h b/include/net/proto_memory.h
new file mode 100644
index 000000000000..a6ab2f4f5e28
--- /dev/null
+++ b/include/net/proto_memory.h
@@ -0,0 +1,83 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+#ifndef _PROTO_MEMORY_H
+#define _PROTO_MEMORY_H
+
+#include <net/sock.h>
+#include <net/hotdata.h>
+
+/* 1 MB per cpu, in page units */
+#define SK_MEMORY_PCPU_RESERVE (1 << (20 - PAGE_SHIFT))
+
+static inline bool sk_has_memory_pressure(const struct sock *sk)
+{
+	return sk->sk_prot->memory_pressure != NULL;
+}
+
+static inline bool
+proto_memory_pressure(const struct proto *prot)
+{
+	if (!prot->memory_pressure)
+		return false;
+	return !!READ_ONCE(*prot->memory_pressure);
+}
+
+static inline bool sk_under_global_memory_pressure(const struct sock *sk)
+{
+	return proto_memory_pressure(sk->sk_prot);
+}
+
+static inline bool sk_under_memory_pressure(const struct sock *sk)
+{
+	if (!sk->sk_prot->memory_pressure)
+		return false;
+
+	if (mem_cgroup_sockets_enabled && sk->sk_memcg &&
+	    mem_cgroup_under_socket_pressure(sk->sk_memcg))
+		return true;
+
+	return !!READ_ONCE(*sk->sk_prot->memory_pressure);
+}
+
+static inline long
+proto_memory_allocated(const struct proto *prot)
+{
+	return max(0L, atomic_long_read(prot->memory_allocated));
+}
+
+static inline long
+sk_memory_allocated(const struct sock *sk)
+{
+	return proto_memory_allocated(sk->sk_prot);
+}
+
+static inline void proto_memory_pcpu_drain(struct proto *proto)
+{
+	int val = this_cpu_xchg(*proto->per_cpu_fw_alloc, 0);
+
+	if (val)
+		atomic_long_add(val, proto->memory_allocated);
+}
+
+static inline void
+sk_memory_allocated_add(const struct sock *sk, int val)
+{
+	struct proto *proto = sk->sk_prot;
+
+	val = this_cpu_add_return(*proto->per_cpu_fw_alloc, val);
+
+	if (unlikely(val >= READ_ONCE(net_hotdata.sysctl_mem_pcpu_rsv)))
+		proto_memory_pcpu_drain(proto);
+}
+
+static inline void
+sk_memory_allocated_sub(const struct sock *sk, int val)
+{
+	struct proto *proto = sk->sk_prot;
+
+	val = this_cpu_sub_return(*proto->per_cpu_fw_alloc, val);
+
+	if (unlikely(val <= -READ_ONCE(net_hotdata.sysctl_mem_pcpu_rsv)))
+		proto_memory_pcpu_drain(proto);
+}
+
+#endif /* _PROTO_MEMORY_H */