18 #define all_corrupt_bio_flags_match(bio, fc)	\  argument
19 	(((bio)->bi_rw & (fc)->corrupt_bio_flags) == (fc)->corrupt_bio_flags)
46 static int parse_features(struct dm_arg_set *as, struct flakey_c *fc,  in parse_features()  argument
76 			if (test_and_set_bit(DROP_WRITES, &fc->flags)) {  in parse_features()
93 			r = dm_read_arg(_args + 1, as, &fc->corrupt_bio_byte, &ti->error);  in parse_features()
103 				fc->corrupt_bio_rw = WRITE;  in parse_features()
105 				fc->corrupt_bio_rw = READ;  in parse_features()
115 			r = dm_read_arg(_args + 2, as, &fc->corrupt_bio_value, &ti->error);  in parse_features()
123 			r = dm_read_arg(_args + 3, as, &fc->corrupt_bio_flags, &ti->error);  in parse_features()
135 	if (test_bit(DROP_WRITES, &fc->flags) && (fc->corrupt_bio_rw == WRITE)) {  in parse_features()
163 	struct flakey_c *fc;  in flakey_ctr()  local
177 	fc = kzalloc(sizeof(*fc), GFP_KERNEL);  in flakey_ctr()
178 	if (!fc) {  in flakey_ctr()
182 	fc->start_time = jiffies;  in flakey_ctr()
190 	fc->start = tmpll;  in flakey_ctr()
192 	r = dm_read_arg(_args, &as, &fc->up_interval, &ti->error);  in flakey_ctr()
196 	r = dm_read_arg(_args, &as, &fc->down_interval, &ti->error);  in flakey_ctr()
200 	if (!(fc->up_interval + fc->down_interval)) {  in flakey_ctr()
205 	if (fc->up_interval + fc->down_interval < fc->up_interval) {  in flakey_ctr()
210 	r = parse_features(&as, fc, ti);  in flakey_ctr()
214 	if (dm_get_device(ti, devname, dm_table_get_mode(ti->table), &fc->dev)) {  in flakey_ctr()
222 	ti->private = fc;  in flakey_ctr()
226 	kfree(fc);  in flakey_ctr()
232 	struct flakey_c *fc = ti->private;  in flakey_dtr()  local
234 	dm_put_device(ti, fc->dev);  in flakey_dtr()
235 	kfree(fc);  in flakey_dtr()
240 	struct flakey_c *fc = ti->private;  in flakey_map_sector()  local
242 	return fc->start + dm_target_offset(ti, bi_sector);  in flakey_map_sector()
247 	struct flakey_c *fc = ti->private;  in flakey_map_bio()  local
249 	bio->bi_bdev = fc->dev->bdev;  in flakey_map_bio()
255 static void corrupt_bio_data(struct bio *bio, struct flakey_c *fc)  in corrupt_bio_data()  argument
263 	if (data && bio_bytes >= fc->corrupt_bio_byte) {  in corrupt_bio_data()
264 		data[fc->corrupt_bio_byte - 1] = fc->corrupt_bio_value;  in corrupt_bio_data()
268 			bio, fc->corrupt_bio_value, fc->corrupt_bio_byte,  in corrupt_bio_data()
276 	struct flakey_c *fc = ti->private;  in flakey_map()  local
282 	elapsed = (jiffies - fc->start_time) / HZ;  in flakey_map()
283 	if (elapsed % (fc->up_interval + fc->down_interval) >= fc->up_interval) {  in flakey_map()
298 		if (test_bit(DROP_WRITES, &fc->flags)) {  in flakey_map()
306 		if (fc->corrupt_bio_byte && (fc->corrupt_bio_rw == WRITE)) {  in flakey_map()
307 			if (all_corrupt_bio_flags_match(bio, fc))  in flakey_map()
308 				corrupt_bio_data(bio, fc);  in flakey_map()
326 	struct flakey_c *fc = ti->private;  in flakey_end_io()  local
333 	if (fc->corrupt_bio_byte && !error && pb->bio_submitted &&  in flakey_end_io()
334 	    (bio_data_dir(bio) == READ) && (fc->corrupt_bio_rw == READ) &&  in flakey_end_io()
335 	    all_corrupt_bio_flags_match(bio, fc))  in flakey_end_io()
336 		corrupt_bio_data(bio, fc);  in flakey_end_io()
345 	struct flakey_c *fc = ti->private;  in flakey_status()  local
354 		DMEMIT("%s %llu %u %u ", fc->dev->name,  in flakey_status()
355 		       (unsigned long long)fc->start, fc->up_interval,  in flakey_status()
356 		       fc->down_interval);  in flakey_status()
358 		drop_writes = test_bit(DROP_WRITES, &fc->flags);  in flakey_status()
359 		DMEMIT("%u ", drop_writes + (fc->corrupt_bio_byte > 0) * 5);  in flakey_status()
364 		if (fc->corrupt_bio_byte)  in flakey_status()
366 			       fc->corrupt_bio_byte,  in flakey_status()
367 			       (fc->corrupt_bio_rw == WRITE) ? 'w' : 'r',  in flakey_status()
368 			       fc->corrupt_bio_value, fc->corrupt_bio_flags);  in flakey_status()
376 	struct flakey_c *fc = ti->private;  in flakey_ioctl()  local
377 	struct dm_dev *dev = fc->dev;  in flakey_ioctl()
383 	if (fc->start ||  in flakey_ioctl()
393 	struct flakey_c *fc = ti->private;  in flakey_merge()  local
394 	struct request_queue *q = bdev_get_queue(fc->dev->bdev);  in flakey_merge()
399 	bvm->bi_bdev = fc->dev->bdev;  in flakey_merge()
407 	struct flakey_c *fc = ti->private;  in flakey_iterate_devices()  local
409 	return fn(ti, fc->dev, fc->start, ti->len, data);  in flakey_iterate_devices()