forked from Qortal/Brooklyn
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.
41 lines
771 B
C
41 lines
771 B
C
#ifndef _LINUX_BLOCKGROUP_LOCK_H
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#define _LINUX_BLOCKGROUP_LOCK_H
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/*
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* Per-blockgroup locking for ext2 and ext3.
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*
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* Simple hashed spinlocking.
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*/
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#include <linux/spinlock.h>
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#include <linux/cache.h>
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#ifdef CONFIG_SMP
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#define NR_BG_LOCKS (4 << ilog2(NR_CPUS < 32 ? NR_CPUS : 32))
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#else
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#define NR_BG_LOCKS 1
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#endif
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struct bgl_lock {
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spinlock_t lock;
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} ____cacheline_aligned_in_smp;
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struct blockgroup_lock {
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struct bgl_lock locks[NR_BG_LOCKS];
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};
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static inline void bgl_lock_init(struct blockgroup_lock *bgl)
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{
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int i;
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for (i = 0; i < NR_BG_LOCKS; i++)
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spin_lock_init(&bgl->locks[i].lock);
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}
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static inline spinlock_t *
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bgl_lock_ptr(struct blockgroup_lock *bgl, unsigned int block_group)
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{
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return &bgl->locks[block_group & (NR_BG_LOCKS-1)].lock;
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}
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#endif
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