| 1 | #ifndef _LINUX_FAULT_INJECT_H
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| 2 | #define _LINUX_FAULT_INJECT_H
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| 3 |
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| 4 | #ifdef CONFIG_FAULT_INJECTION
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| 5 |
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| 6 | #include <linux/types.h>
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| 7 | #include <linux/debugfs.h>
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| 8 | #include <linux/atomic.h>
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| 9 |
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| 10 | |
| 11 | * For explanation of the elements of this struct, see
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| 12 | * Documentation/fault-injection/fault-injection.txt
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| 13 |
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| 14 | struct fault_attr {
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| 15 | unsigned long probability;
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| 16 | unsigned long interval;
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| 17 | atomic_t times;
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| 18 | atomic_t space;
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| 19 | unsigned long verbose;
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| 20 | u32 task_filter;
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| 21 | unsigned long stacktrace_depth;
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| 22 | unsigned long require_start;
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| 23 | unsigned long require_end;
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| 24 | unsigned long reject_start;
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| 25 | unsigned long reject_end;
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| 26 |
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| 27 | unsigned long count;
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| 28 | };
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| 29 |
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| 30 | #define FAULT_ATTR_INITIALIZER { \
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| 31 | .interval = 1, \
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| 32 | .times = ATOMIC_INIT(1), \
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| 33 | .require_end = ULONG_MAX, \
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| 34 | .stacktrace_depth = 32, \
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| 35 | .verbose = 2, \
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| 36 | }
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| 37 |
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| 38 | #define DECLARE_FAULT_ATTR(name) struct fault_attr name = FAULT_ATTR_INITIALIZER
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| 39 | int setup_fault_attr(struct fault_attr *attr, char *str);
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| 40 | bool should_fail(struct fault_attr *attr, ssize_t size);
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| 41 |
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| 42 | #ifdef CONFIG_FAULT_INJECTION_DEBUG_FS
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| 43 |
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| 44 | struct dentry *fault_create_debugfs_attr(const char *name,
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| 45 | struct dentry *parent, struct fault_attr *attr);
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| 46 |
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| 47 | #else
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| 48 |
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| 49 | static inline struct dentry *fault_create_debugfs_attr(const char *name,
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| 50 | struct dentry *parent, struct fault_attr *attr)
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| 51 | {
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| 52 | return ERR_PTR(-ENODEV);
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| 53 | }
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| 54 |
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| 55 | #endif
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| 56 |
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| 57 | #endif
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| 58 |
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| 59 | #ifdef CONFIG_FAILSLAB
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| 60 | extern bool should_failslab(size_t size, gfp_t gfpflags, unsigned long flags);
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| 61 | #else
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| 62 | static inline bool should_failslab(size_t size, gfp_t gfpflags,
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| 63 | unsigned long flags)
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| 64 | {
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| 65 | return false;
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| 66 | }
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| 67 | #endif
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| 68 |
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| 69 | #endif
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