94 static int check_mode(struct faulty_conf *conf, int mode)  in check_mode()  argument
96 	if (conf->period[mode] == 0 &&  in check_mode()
97 	    atomic_read(&conf->counters[mode]) <= 0)  in check_mode()
101 	if (atomic_dec_and_test(&conf->counters[mode])) {  in check_mode()
102 		if (conf->period[mode])  in check_mode()
103 			atomic_set(&conf->counters[mode], conf->period[mode]);  in check_mode()
109 static int check_sector(struct faulty_conf *conf, sector_t start, sector_t end, int dir)  in check_sector()  argument
113 	for (i=0; i<conf->nfaults; i++)  in check_sector()
114 		if (conf->faults[i] >= start &&  in check_sector()
115 		    conf->faults[i] < end) {  in check_sector()
117 			switch (conf->modes[i] * 2 + dir) {  in check_sector()
122 				conf->modes[i] = NoPersist;  in check_sector()
133 static void add_sector(struct faulty_conf *conf, sector_t start, int mode)  in add_sector()  argument
136 	int n = conf->nfaults;  in add_sector()
137 	for (i=0; i<conf->nfaults; i++)  in add_sector()
138 		if (conf->faults[i] == start) {  in add_sector()
140 			case NoPersist: conf->modes[i] = mode; return;  in add_sector()
142 				if (conf->modes[i] == ReadPersistent ||  in add_sector()
143 				    conf->modes[i] == ReadFixable)  in add_sector()
144 					conf->modes[i] = AllPersist;  in add_sector()
146 					conf->modes[i] = WritePersistent;  in add_sector()
149 				if (conf->modes[i] == WritePersistent)  in add_sector()
150 					conf->modes[i] = AllPersist;  in add_sector()
152 					conf->modes[i] = ReadPersistent;  in add_sector()
155 				if (conf->modes[i] == WritePersistent ||  in add_sector()
156 				    conf->modes[i] == ReadPersistent)  in add_sector()
157 					conf->modes[i] = AllPersist;  in add_sector()
159 					conf->modes[i] = ReadFixable;  in add_sector()
162 		} else if (conf->modes[i] == NoPersist)  in add_sector()
167 	conf->faults[n] = start;  in add_sector()
168 	conf->modes[n] = mode;  in add_sector()
169 	if (conf->nfaults == n)  in add_sector()
170 		conf->nfaults = n+1;  in add_sector()
175 	struct faulty_conf *conf = mddev->private;  in make_request()  local
180 		if (atomic_read(&conf->counters[WriteAll])) {  in make_request()
188 		if (check_sector(conf, bio->bi_iter.bi_sector,  in make_request()
191 		if (check_mode(conf, WritePersistent)) {  in make_request()
192 			add_sector(conf, bio->bi_iter.bi_sector,  in make_request()
196 		if (check_mode(conf, WriteTransient))  in make_request()
200 		if (check_sector(conf, bio->bi_iter.bi_sector,  in make_request()
203 		if (check_mode(conf, ReadTransient))  in make_request()
205 		if (check_mode(conf, ReadPersistent)) {  in make_request()
206 			add_sector(conf, bio->bi_iter.bi_sector,  in make_request()
210 		if (check_mode(conf, ReadFixable)) {  in make_request()
211 			add_sector(conf, bio->bi_iter.bi_sector,  in make_request()
219 		b->bi_bdev = conf->rdev->bdev;  in make_request()
224 		bio->bi_bdev = conf->rdev->bdev;  in make_request()
231 	struct faulty_conf *conf = mddev->private;  in status()  local
234 	if ((n=atomic_read(&conf->counters[WriteTransient])) != 0)  in status()
236 			   n, conf->period[WriteTransient]);  in status()
238 	if ((n=atomic_read(&conf->counters[ReadTransient])) != 0)  in status()
240 			   n, conf->period[ReadTransient]);  in status()
242 	if ((n=atomic_read(&conf->counters[WritePersistent])) != 0)  in status()
244 			   n, conf->period[WritePersistent]);  in status()
246 	if ((n=atomic_read(&conf->counters[ReadPersistent])) != 0)  in status()
248 			   n, conf->period[ReadPersistent]);  in status()
251 	if ((n=atomic_read(&conf->counters[ReadFixable])) != 0)  in status()
253 			   n, conf->period[ReadFixable]);  in status()
255 	if ((n=atomic_read(&conf->counters[WriteAll])) != 0)  in status()
258 	seq_printf(seq, " nfaults=%d", conf->nfaults);  in status()
266 	struct faulty_conf *conf = mddev->private;  in reshape()  local
273 		conf->nfaults = 0;  in reshape()
277 			conf->period[i] = 0;  in reshape()
278 			atomic_set(&conf->counters[i], 0);  in reshape()
281 		conf->period[mode] = count;  in reshape()
283 		atomic_set(&conf->counters[mode], count);  in reshape()
306 	struct faulty_conf *conf;  in run()  local
311 	conf = kmalloc(sizeof(*conf), GFP_KERNEL);  in run()
312 	if (!conf)  in run()
316 		atomic_set(&conf->counters[i], 0);  in run()
317 		conf->period[i] = 0;  in run()
319 	conf->nfaults = 0;  in run()
322 		conf->rdev = rdev;  in run()
328 	mddev->private = conf;  in run()
337 	struct faulty_conf *conf = priv;  in faulty_free()  local
339 	kfree(conf);  in faulty_free()