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Linux kernel mirror (for testing) git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139/* SPDX-License-Identifier: GPL-2.0 *//* * Miscellaneous cgroup controller. * * Copyright 2020 Google LLC * Author: Vipin Sharma <vipinsh@google.com> */#ifndef _MISC_CGROUP_H_#define _MISC_CGROUP_H_
/** * enum misc_res_type - Types of misc cgroup entries supported by the host. */enum misc_res_type {#ifdef CONFIG_KVM_AMD_SEV /** @MISC_CG_RES_SEV: AMD SEV ASIDs resource */ MISC_CG_RES_SEV, /** @MISC_CG_RES_SEV_ES: AMD SEV-ES ASIDs resource */ MISC_CG_RES_SEV_ES,#endif#ifdef CONFIG_INTEL_TDX_HOST /** @MISC_CG_RES_TDX: Intel TDX HKIDs resource */ MISC_CG_RES_TDX,#endif /** @MISC_CG_RES_TYPES: count of enum misc_res_type constants */ MISC_CG_RES_TYPES};
struct misc_cg;
#ifdef CONFIG_CGROUP_MISC
#include <linux/cgroup.h>
/** * struct misc_res: Per cgroup per misc type resource * @max: Maximum limit on the resource. * @watermark: Historical maximum usage of the resource. * @usage: Current usage of the resource. * @events: Number of times, the resource limit exceeded. */struct misc_res { u64 max; atomic64_t watermark; atomic64_t usage; atomic64_t events; atomic64_t events_local;};
/** * struct misc_cg - Miscellaneous controller's cgroup structure. * @css: cgroup subsys state object. * @events_file: Handle for the misc resources events file. * @res: Array of misc resources usage in the cgroup. */struct misc_cg { struct cgroup_subsys_state css;
/* misc.events */ struct cgroup_file events_file; /* misc.events.local */ struct cgroup_file events_local_file;
struct misc_res res[MISC_CG_RES_TYPES];};
int misc_cg_set_capacity(enum misc_res_type type, u64 capacity);int misc_cg_try_charge(enum misc_res_type type, struct misc_cg *cg, u64 amount);void misc_cg_uncharge(enum misc_res_type type, struct misc_cg *cg, u64 amount);
/** * css_misc() - Get misc cgroup from the css. * @css: cgroup subsys state object. * * Context: Any context. * Return: * * %NULL - If @css is null. * * struct misc_cg* - misc cgroup pointer of the passed css. */static inline struct misc_cg *css_misc(struct cgroup_subsys_state *css){ return css ? container_of(css, struct misc_cg, css) : NULL;}
/* * get_current_misc_cg() - Find and get the misc cgroup of the current task. * * Returned cgroup has its ref count increased by 1. Caller must call * put_misc_cg() to return the reference. * * Return: Misc cgroup to which the current task belongs to. */static inline struct misc_cg *get_current_misc_cg(void){ return css_misc(task_get_css(current, misc_cgrp_id));}
/* * put_misc_cg() - Put the misc cgroup and reduce its ref count. * @cg - cgroup to put. */static inline void put_misc_cg(struct misc_cg *cg){ if (cg) css_put(&cg->css);}
#else /* !CONFIG_CGROUP_MISC */
static inline int misc_cg_set_capacity(enum misc_res_type type, u64 capacity){ return 0;}
static inline int misc_cg_try_charge(enum misc_res_type type, struct misc_cg *cg, u64 amount){ return 0;}
static inline void misc_cg_uncharge(enum misc_res_type type, struct misc_cg *cg, u64 amount){}
static inline struct misc_cg *get_current_misc_cg(void){ return NULL;}
static inline void put_misc_cg(struct misc_cg *cg){}
#endif /* CONFIG_CGROUP_MISC */#endif /* _MISC_CGROUP_H_ */