18 #define all_corrupt_bio_flags_match(bio, fc)	\  argument
19 	(((bio)->bi_opf & (fc)->corrupt_bio_flags) == (fc)->corrupt_bio_flags)
47 static int parse_features(struct dm_arg_set *as, struct flakey_c *fc,  in parse_features()  argument
82 			if (test_and_set_bit(DROP_WRITES, &fc->flags)) {  in parse_features()
85 			} else if (test_bit(ERROR_WRITES, &fc->flags)) {  in parse_features()
97 			if (test_and_set_bit(ERROR_WRITES, &fc->flags)) {  in parse_features()
101 			} else if (test_bit(DROP_WRITES, &fc->flags)) {  in parse_features()
118 			r = dm_read_arg(_args + 1, as, &fc->corrupt_bio_byte, &ti->error);  in parse_features()
128 				fc->corrupt_bio_rw = WRITE;  in parse_features()
130 				fc->corrupt_bio_rw = READ;  in parse_features()
140 			r = dm_read_arg(_args + 2, as, &fc->corrupt_bio_value, &ti->error);  in parse_features()
148 			r = dm_read_arg(_args + 3, as, &fc->corrupt_bio_flags, &ti->error);  in parse_features()
160 	if (test_bit(DROP_WRITES, &fc->flags) && (fc->corrupt_bio_rw == WRITE)) {  in parse_features()
164 	} else if (test_bit(ERROR_WRITES, &fc->flags) && (fc->corrupt_bio_rw == WRITE)) {  in parse_features()
192 	struct flakey_c *fc;  in flakey_ctr()  local
206 	fc = kzalloc(sizeof(*fc), GFP_KERNEL);  in flakey_ctr()
207 	if (!fc) {  in flakey_ctr()
211 	fc->start_time = jiffies;  in flakey_ctr()
220 	fc->start = tmpll;  in flakey_ctr()
222 	r = dm_read_arg(_args, &as, &fc->up_interval, &ti->error);  in flakey_ctr()
226 	r = dm_read_arg(_args, &as, &fc->down_interval, &ti->error);  in flakey_ctr()
230 	if (!(fc->up_interval + fc->down_interval)) {  in flakey_ctr()
236 	if (fc->up_interval + fc->down_interval < fc->up_interval) {  in flakey_ctr()
242 	r = parse_features(&as, fc, ti);  in flakey_ctr()
246 	r = dm_get_device(ti, devname, dm_table_get_mode(ti->table), &fc->dev);  in flakey_ctr()
255 	ti->private = fc;  in flakey_ctr()
259 	kfree(fc);  in flakey_ctr()
265 	struct flakey_c *fc = ti->private;  in flakey_dtr()  local
267 	dm_put_device(ti, fc->dev);  in flakey_dtr()
268 	kfree(fc);  in flakey_dtr()
273 	struct flakey_c *fc = ti->private;  in flakey_map_sector()  local
275 	return fc->start + dm_target_offset(ti, bi_sector);  in flakey_map_sector()
280 	struct flakey_c *fc = ti->private;  in flakey_map_bio()  local
282 	bio_set_dev(bio, fc->dev->bdev);  in flakey_map_bio()
288 static void corrupt_bio_data(struct bio *bio, struct flakey_c *fc)  in corrupt_bio_data()  argument
296 	if (data && bio_bytes >= fc->corrupt_bio_byte) {  in corrupt_bio_data()
297 		data[fc->corrupt_bio_byte - 1] = fc->corrupt_bio_value;  in corrupt_bio_data()
301 			bio, fc->corrupt_bio_value, fc->corrupt_bio_byte,  in corrupt_bio_data()
309 	struct flakey_c *fc = ti->private;  in flakey_map()  local
323 	elapsed = (jiffies - fc->start_time) / HZ;  in flakey_map()
324 	if (elapsed % (fc->up_interval + fc->down_interval) >= fc->up_interval) {  in flakey_map()
335 			if (!fc->corrupt_bio_byte && !test_bit(DROP_WRITES, &fc->flags) &&  in flakey_map()
336 			    !test_bit(ERROR_WRITES, &fc->flags))  in flakey_map()
344 		if (test_bit(DROP_WRITES, &fc->flags)) {  in flakey_map()
348 		else if (test_bit(ERROR_WRITES, &fc->flags)) {  in flakey_map()
356 		if (fc->corrupt_bio_byte && (fc->corrupt_bio_rw == WRITE)) {  in flakey_map()
357 			if (all_corrupt_bio_flags_match(bio, fc))  in flakey_map()
358 				corrupt_bio_data(bio, fc);  in flakey_map()
377 	struct flakey_c *fc = ti->private;  in flakey_end_io()  local
384 		dm_remap_zone_report(ti, bio, fc->start);  in flakey_end_io()
389 		if (fc->corrupt_bio_byte && (fc->corrupt_bio_rw == READ) &&  in flakey_end_io()
390 		    all_corrupt_bio_flags_match(bio, fc)) {  in flakey_end_io()
394 			corrupt_bio_data(bio, fc);  in flakey_end_io()
396 		} else if (!test_bit(DROP_WRITES, &fc->flags) &&  in flakey_end_io()
397 			   !test_bit(ERROR_WRITES, &fc->flags)) {  in flakey_end_io()
413 	struct flakey_c *fc = ti->private;  in flakey_status()  local
422 		DMEMIT("%s %llu %u %u ", fc->dev->name,  in flakey_status()
423 		       (unsigned long long)fc->start, fc->up_interval,  in flakey_status()
424 		       fc->down_interval);  in flakey_status()
426 		drop_writes = test_bit(DROP_WRITES, &fc->flags);  in flakey_status()
427 		error_writes = test_bit(ERROR_WRITES, &fc->flags);  in flakey_status()
428 		DMEMIT("%u ", drop_writes + error_writes + (fc->corrupt_bio_byte > 0) * 5);  in flakey_status()
435 		if (fc->corrupt_bio_byte)  in flakey_status()
437 			       fc->corrupt_bio_byte,  in flakey_status()
438 			       (fc->corrupt_bio_rw == WRITE) ? 'w' : 'r',  in flakey_status()
439 			       fc->corrupt_bio_value, fc->corrupt_bio_flags);  in flakey_status()
447 	struct flakey_c *fc = ti->private;  in flakey_prepare_ioctl()  local
449 	*bdev = fc->dev->bdev;  in flakey_prepare_ioctl()
454 	if (fc->start ||  in flakey_prepare_ioctl()
462 	struct flakey_c *fc = ti->private;  in flakey_iterate_devices()  local
464 	return fn(ti, fc->dev, fc->start, ti->len, data);  in flakey_iterate_devices()