/* 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 boolproto_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_sk_enabled(sk) &&	    mem_cgroup_sk_under_memory_pressure(sk))		return true; 	if (sk->sk_bypass_prot_mem)		return false; 	return !!READ_ONCE(*sk->sk_prot->memory_pressure);} static inline longproto_memory_allocated(const struct proto *prot){	return max(0L, atomic_long_read(prot->memory_allocated));} static inline longsk_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 voidsk_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 voidsk_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 */