forked from mirrors/linux
773ff60e84
Currently fault-injection capability for SLAB allocator is only available to SLAB. This patch makes it available to SLUB, too. [penberg@cs.helsinki.fi: unify slab and slub implementations] Cc: Christoph Lameter <cl@linux-foundation.org> Cc: Matt Mackall <mpm@selenic.com> Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com> Signed-off-by: Pekka Enberg <penberg@cs.helsinki.fi>
93 lines
2.2 KiB
C
93 lines
2.2 KiB
C
#ifndef _LINUX_FAULT_INJECT_H
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#define _LINUX_FAULT_INJECT_H
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#ifdef CONFIG_FAULT_INJECTION
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#include <linux/types.h>
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#include <linux/debugfs.h>
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#include <asm/atomic.h>
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/*
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* For explanation of the elements of this struct, see
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* Documentation/fault-injection/fault-injection.txt
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*/
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struct fault_attr {
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unsigned long probability;
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unsigned long interval;
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atomic_t times;
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atomic_t space;
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unsigned long verbose;
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u32 task_filter;
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unsigned long stacktrace_depth;
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unsigned long require_start;
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unsigned long require_end;
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unsigned long reject_start;
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unsigned long reject_end;
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unsigned long count;
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#ifdef CONFIG_FAULT_INJECTION_DEBUG_FS
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struct {
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struct dentry *dir;
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struct dentry *probability_file;
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struct dentry *interval_file;
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struct dentry *times_file;
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struct dentry *space_file;
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struct dentry *verbose_file;
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struct dentry *task_filter_file;
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struct dentry *stacktrace_depth_file;
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struct dentry *require_start_file;
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struct dentry *require_end_file;
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struct dentry *reject_start_file;
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struct dentry *reject_end_file;
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} dentries;
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#endif
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};
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#define FAULT_ATTR_INITIALIZER { \
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.interval = 1, \
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.times = ATOMIC_INIT(1), \
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.require_end = ULONG_MAX, \
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.stacktrace_depth = 32, \
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.verbose = 2, \
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}
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#define DECLARE_FAULT_ATTR(name) struct fault_attr name = FAULT_ATTR_INITIALIZER
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int setup_fault_attr(struct fault_attr *attr, char *str);
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void should_fail_srandom(unsigned long entropy);
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bool should_fail(struct fault_attr *attr, ssize_t size);
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#ifdef CONFIG_FAULT_INJECTION_DEBUG_FS
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int init_fault_attr_dentries(struct fault_attr *attr, const char *name);
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void cleanup_fault_attr_dentries(struct fault_attr *attr);
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#else /* CONFIG_FAULT_INJECTION_DEBUG_FS */
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static inline int init_fault_attr_dentries(struct fault_attr *attr,
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const char *name)
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{
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return -ENODEV;
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}
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static inline void cleanup_fault_attr_dentries(struct fault_attr *attr)
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{
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}
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#endif /* CONFIG_FAULT_INJECTION_DEBUG_FS */
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#endif /* CONFIG_FAULT_INJECTION */
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#ifdef CONFIG_FAILSLAB
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extern bool should_failslab(size_t size, gfp_t gfpflags);
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#else
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static inline bool should_failslab(size_t size, gfp_t gfpflags)
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{
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return false;
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}
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#endif /* CONFIG_FAILSLAB */
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#endif /* _LINUX_FAULT_INJECT_H */
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