17 int setup_fault_attr(struct fault_attr *attr, char *str)  in setup_fault_attr()  argument
32 	attr->probability = probability;  in setup_fault_attr()
33 	attr->interval = interval;  in setup_fault_attr()
34 	atomic_set(&attr->times, times);  in setup_fault_attr()
35 	atomic_set(&attr->space, space);  in setup_fault_attr()
41 static void fail_dump(struct fault_attr *attr)  in fail_dump()  argument
43 	if (attr->verbose > 0 && __ratelimit(&attr->ratelimit_state)) {  in fail_dump()
46 		       "space %d, times %d\n", attr->dname,  in fail_dump()
47 		       attr->interval, attr->probability,  in fail_dump()
48 		       atomic_read(&attr->space),  in fail_dump()
49 		       atomic_read(&attr->times));  in fail_dump()
50 		if (attr->verbose > 1)  in fail_dump()
57 static bool fail_task(struct fault_attr *attr, struct task_struct *task)  in fail_task()  argument
66 static bool fail_stacktrace(struct fault_attr *attr)  in fail_stacktrace()  argument
69 	int depth = attr->stacktrace_depth;  in fail_stacktrace()
72 	bool found = (attr->require_start == 0 && attr->require_end == ULONG_MAX);  in fail_stacktrace()
84 		if (attr->reject_start <= entries[n] &&  in fail_stacktrace()
85 			       entries[n] < attr->reject_end)  in fail_stacktrace()
87 		if (attr->require_start <= entries[n] &&  in fail_stacktrace()
88 			       entries[n] < attr->require_end)  in fail_stacktrace()
96 static inline bool fail_stacktrace(struct fault_attr *attr)  in fail_stacktrace()  argument
108 bool should_fail(struct fault_attr *attr, ssize_t size)  in should_fail()  argument
111 	if (attr->probability == 0)  in should_fail()
114 	if (attr->task_filter && !fail_task(attr, current))  in should_fail()
117 	if (atomic_read(&attr->times) == 0)  in should_fail()
120 	if (atomic_read(&attr->space) > size) {  in should_fail()
121 		atomic_sub(size, &attr->space);  in should_fail()
125 	if (attr->interval > 1) {  in should_fail()
126 		attr->count++;  in should_fail()
127 		if (attr->count % attr->interval)  in should_fail()
131 	if (attr->probability <= prandom_u32() % 100)  in should_fail()
134 	if (!fail_stacktrace(attr))  in should_fail()
137 	fail_dump(attr);  in should_fail()
139 	if (atomic_read(&attr->times) != -1)  in should_fail()
140 		atomic_dec_not_zero(&attr->times);  in should_fail()
192 			struct dentry *parent, struct fault_attr *attr)  in fault_create_debugfs_attr()  argument
201 	if (!debugfs_create_ul("probability", mode, dir, &attr->probability))  in fault_create_debugfs_attr()
203 	if (!debugfs_create_ul("interval", mode, dir, &attr->interval))  in fault_create_debugfs_attr()
205 	if (!debugfs_create_atomic_t("times", mode, dir, &attr->times))  in fault_create_debugfs_attr()
207 	if (!debugfs_create_atomic_t("space", mode, dir, &attr->space))  in fault_create_debugfs_attr()
209 	if (!debugfs_create_ul("verbose", mode, dir, &attr->verbose))  in fault_create_debugfs_attr()
212 				&attr->ratelimit_state.interval))  in fault_create_debugfs_attr()
215 				&attr->ratelimit_state.burst))  in fault_create_debugfs_attr()
217 	if (!debugfs_create_bool("task-filter", mode, dir, &attr->task_filter))  in fault_create_debugfs_attr()
223 				&attr->stacktrace_depth))  in fault_create_debugfs_attr()
226 				&attr->require_start))  in fault_create_debugfs_attr()
228 	if (!debugfs_create_ul("require-end", mode, dir, &attr->require_end))  in fault_create_debugfs_attr()
230 	if (!debugfs_create_ul("reject-start", mode, dir, &attr->reject_start))  in fault_create_debugfs_attr()
232 	if (!debugfs_create_ul("reject-end", mode, dir, &attr->reject_end))  in fault_create_debugfs_attr()
237 	attr->dname = dget(dir);  in fault_create_debugfs_attr()