18 int setup_fault_attr(struct fault_attr *attr, char *str)  in setup_fault_attr()  argument
33 	attr->probability = probability;  in setup_fault_attr()
34 	attr->interval = interval;  in setup_fault_attr()
35 	atomic_set(&attr->times, times);  in setup_fault_attr()
36 	atomic_set(&attr->space, space);  in setup_fault_attr()
42 static void fail_dump(struct fault_attr *attr)  in fail_dump()  argument
44 	if (attr->verbose > 0 && __ratelimit(&attr->ratelimit_state)) {  in fail_dump()
47 		       "space %d, times %d\n", attr->dname,  in fail_dump()
48 		       attr->interval, attr->probability,  in fail_dump()
49 		       atomic_read(&attr->space),  in fail_dump()
50 		       atomic_read(&attr->times));  in fail_dump()
51 		if (attr->verbose > 1)  in fail_dump()
58 static bool fail_task(struct fault_attr *attr, struct task_struct *task)  in fail_task()  argument
67 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()
79 		if (attr->reject_start <= entries[n] &&  in fail_stacktrace()
80 			       entries[n] < attr->reject_end)  in fail_stacktrace()
82 		if (attr->require_start <= entries[n] &&  in fail_stacktrace()
83 			       entries[n] < attr->require_end)  in fail_stacktrace()
91 static inline bool fail_stacktrace(struct fault_attr *attr)  in fail_stacktrace()  argument
103 bool should_fail(struct fault_attr *attr, ssize_t size)  in should_fail()  argument
119 	if (attr->probability == 0)  in should_fail()
122 	if (attr->task_filter && !fail_task(attr, current))  in should_fail()
125 	if (atomic_read(&attr->times) == 0)  in should_fail()
128 	if (atomic_read(&attr->space) > size) {  in should_fail()
129 		atomic_sub(size, &attr->space);  in should_fail()
133 	if (attr->interval > 1) {  in should_fail()
134 		attr->count++;  in should_fail()
135 		if (attr->count % attr->interval)  in should_fail()
139 	if (attr->probability <= prandom_u32() % 100)  in should_fail()
142 	if (!fail_stacktrace(attr))  in should_fail()
146 	fail_dump(attr);  in should_fail()
148 	if (atomic_read(&attr->times) != -1)  in should_fail()
149 		atomic_dec_not_zero(&attr->times);  in should_fail()
200 			struct dentry *parent, struct fault_attr *attr)  in fault_create_debugfs_attr()  argument
209 	debugfs_create_ul("probability", mode, dir, &attr->probability);  in fault_create_debugfs_attr()
210 	debugfs_create_ul("interval", mode, dir, &attr->interval);  in fault_create_debugfs_attr()
211 	debugfs_create_atomic_t("times", mode, dir, &attr->times);  in fault_create_debugfs_attr()
212 	debugfs_create_atomic_t("space", mode, dir, &attr->space);  in fault_create_debugfs_attr()
213 	debugfs_create_ul("verbose", mode, dir, &attr->verbose);  in fault_create_debugfs_attr()
215 			   &attr->ratelimit_state.interval);  in fault_create_debugfs_attr()
217 			   &attr->ratelimit_state.burst);  in fault_create_debugfs_attr()
218 	debugfs_create_bool("task-filter", mode, dir, &attr->task_filter);  in fault_create_debugfs_attr()
222 					&attr->stacktrace_depth);  in fault_create_debugfs_attr()
223 	debugfs_create_ul("require-start", mode, dir, &attr->require_start);  in fault_create_debugfs_attr()
224 	debugfs_create_ul("require-end", mode, dir, &attr->require_end);  in fault_create_debugfs_attr()
225 	debugfs_create_ul("reject-start", mode, dir, &attr->reject_start);  in fault_create_debugfs_attr()
226 	debugfs_create_ul("reject-end", mode, dir, &attr->reject_end);  in fault_create_debugfs_attr()
229 	attr->dname = dget(dir);  in fault_create_debugfs_attr()