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2a709f28fa
* 0day explit mitigation * Memory corruption prevention * Privilege escalation prevention * Buffer over flow prevention * File System corruption defense * Thread escape prevention This may very well be the most intensive inclusion to BrooklynR. This will not be part of an x86 suite nor it will be released as tool kit. The security core toolkit will remain part of kernel base.
131 lines
3.3 KiB
C
131 lines
3.3 KiB
C
/*
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* Copyright IBM Corporation, 2012
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* Author Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of version 2.1 of the GNU Lesser General Public License
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* as published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it would be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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*
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*/
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#ifndef _LINUX_HUGETLB_CGROUP_H
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#define _LINUX_HUGETLB_CGROUP_H
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#include <linux/mmdebug.h>
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struct hugetlb_cgroup;
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/*
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* Minimum page order trackable by hugetlb cgroup.
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* At least 3 pages are necessary for all the tracking information.
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*/
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#define HUGETLB_CGROUP_MIN_ORDER 2
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#ifdef CONFIG_CGROUP_HUGETLB
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enum {
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RES_USAGE,
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RES_LIMIT,
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RES_MAX_USAGE,
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RES_FAILCNT,
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};
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static inline struct hugetlb_cgroup *hugetlb_cgroup_from_page(struct page *page)
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{
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VM_BUG_ON_PAGE(!PageHuge(page), page);
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if (compound_order(page) < HUGETLB_CGROUP_MIN_ORDER)
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return NULL;
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return (struct hugetlb_cgroup *)page[2].private;
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}
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static inline
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int set_hugetlb_cgroup(struct page *page, struct hugetlb_cgroup *h_cg)
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{
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VM_BUG_ON_PAGE(!PageHuge(page), page);
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if (compound_order(page) < HUGETLB_CGROUP_MIN_ORDER)
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return -1;
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page[2].private = (unsigned long)h_cg;
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return 0;
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}
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static inline bool hugetlb_cgroup_disabled(void)
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{
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return !cgroup_subsys_enabled(hugetlb_cgrp_subsys);
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}
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extern int hugetlb_cgroup_charge_cgroup(int idx, unsigned long nr_pages,
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struct hugetlb_cgroup **ptr);
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extern void hugetlb_cgroup_commit_charge(int idx, unsigned long nr_pages,
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struct hugetlb_cgroup *h_cg,
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struct page *page);
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extern void hugetlb_cgroup_uncharge_page(int idx, unsigned long nr_pages,
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struct page *page);
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extern void hugetlb_cgroup_uncharge_cgroup(int idx, unsigned long nr_pages,
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struct hugetlb_cgroup *h_cg);
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extern void hugetlb_cgroup_file_init(void) __init;
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extern void hugetlb_cgroup_migrate(struct page *oldhpage,
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struct page *newhpage);
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ssize_t hugetlb_cgroup_reset(struct kernfs_open_file *of, char *buf, size_t nbytes, loff_t off);
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ssize_t hugetlb_cgroup_write(struct kernfs_open_file *of, char *buf, size_t nbytes, loff_t off);
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u64 hugetlb_cgroup_read_u64(struct cgroup_subsys_state *css, struct cftype *cft);
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#else
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static inline struct hugetlb_cgroup *hugetlb_cgroup_from_page(struct page *page)
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{
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return NULL;
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}
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static inline
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int set_hugetlb_cgroup(struct page *page, struct hugetlb_cgroup *h_cg)
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{
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return 0;
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}
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static inline bool hugetlb_cgroup_disabled(void)
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{
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return true;
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}
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static inline int
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hugetlb_cgroup_charge_cgroup(int idx, unsigned long nr_pages,
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struct hugetlb_cgroup **ptr)
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{
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return 0;
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}
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static inline void
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hugetlb_cgroup_commit_charge(int idx, unsigned long nr_pages,
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struct hugetlb_cgroup *h_cg,
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struct page *page)
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{
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}
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static inline void
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hugetlb_cgroup_uncharge_page(int idx, unsigned long nr_pages, struct page *page)
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{
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}
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static inline void
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hugetlb_cgroup_uncharge_cgroup(int idx, unsigned long nr_pages,
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struct hugetlb_cgroup *h_cg)
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{
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}
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static inline void hugetlb_cgroup_file_init(void)
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{
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}
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static inline void hugetlb_cgroup_migrate(struct page *oldhpage,
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struct page *newhpage)
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{
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}
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#endif /* CONFIG_MEM_RES_CTLR_HUGETLB */
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#endif
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