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()
191 	fc->start = tmpll;  in flakey_ctr()
193 	r = dm_read_arg(_args, &as, &fc->up_interval, &ti->error);  in flakey_ctr()
197 	r = dm_read_arg(_args, &as, &fc->down_interval, &ti->error);  in flakey_ctr()
201 	if (!(fc->up_interval + fc->down_interval)) {  in flakey_ctr()
206 	if (fc->up_interval + fc->down_interval < fc->up_interval) {  in flakey_ctr()
211 	r = parse_features(&as, fc, ti);  in flakey_ctr()
215 	r = dm_get_device(ti, devname, dm_table_get_mode(ti->table), &fc->dev);  in flakey_ctr()
224 	ti->private = fc;  in flakey_ctr()
228 	kfree(fc);  in flakey_ctr()
234 	struct flakey_c *fc = ti->private;  in flakey_dtr()  local
236 	dm_put_device(ti, fc->dev);  in flakey_dtr()
237 	kfree(fc);  in flakey_dtr()
242 	struct flakey_c *fc = ti->private;  in flakey_map_sector()  local
244 	return fc->start + dm_target_offset(ti, bi_sector);  in flakey_map_sector()
249 	struct flakey_c *fc = ti->private;  in flakey_map_bio()  local
251 	bio->bi_bdev = fc->dev->bdev;  in flakey_map_bio()
257 static void corrupt_bio_data(struct bio *bio, struct flakey_c *fc)  in corrupt_bio_data()  argument
265 	if (data && bio_bytes >= fc->corrupt_bio_byte) {  in corrupt_bio_data()
266 		data[fc->corrupt_bio_byte - 1] = fc->corrupt_bio_value;  in corrupt_bio_data()
270 			bio, fc->corrupt_bio_value, fc->corrupt_bio_byte,  in corrupt_bio_data()
278 	struct flakey_c *fc = ti->private;  in flakey_map()  local
284 	elapsed = (jiffies - fc->start_time) / HZ;  in flakey_map()
285 	if (elapsed % (fc->up_interval + fc->down_interval) >= fc->up_interval) {  in flakey_map()
300 		if (test_bit(DROP_WRITES, &fc->flags)) {  in flakey_map()
308 		if (fc->corrupt_bio_byte && (fc->corrupt_bio_rw == WRITE)) {  in flakey_map()
309 			if (all_corrupt_bio_flags_match(bio, fc))  in flakey_map()
310 				corrupt_bio_data(bio, fc);  in flakey_map()
328 	struct flakey_c *fc = ti->private;  in flakey_end_io()  local
335 	if (fc->corrupt_bio_byte && !error && pb->bio_submitted &&  in flakey_end_io()
336 	    (bio_data_dir(bio) == READ) && (fc->corrupt_bio_rw == READ) &&  in flakey_end_io()
337 	    all_corrupt_bio_flags_match(bio, fc))  in flakey_end_io()
338 		corrupt_bio_data(bio, fc);  in flakey_end_io()
347 	struct flakey_c *fc = ti->private;  in flakey_status()  local
356 		DMEMIT("%s %llu %u %u ", fc->dev->name,  in flakey_status()
357 		       (unsigned long long)fc->start, fc->up_interval,  in flakey_status()
358 		       fc->down_interval);  in flakey_status()
360 		drop_writes = test_bit(DROP_WRITES, &fc->flags);  in flakey_status()
361 		DMEMIT("%u ", drop_writes + (fc->corrupt_bio_byte > 0) * 5);  in flakey_status()
366 		if (fc->corrupt_bio_byte)  in flakey_status()
368 			       fc->corrupt_bio_byte,  in flakey_status()
369 			       (fc->corrupt_bio_rw == WRITE) ? 'w' : 'r',  in flakey_status()
370 			       fc->corrupt_bio_value, fc->corrupt_bio_flags);  in flakey_status()
379 	struct flakey_c *fc = ti->private;  in flakey_prepare_ioctl()  local
381 	*bdev = fc->dev->bdev;  in flakey_prepare_ioctl()
386 	if (fc->start ||  in flakey_prepare_ioctl()
394 	struct flakey_c *fc = ti->private;  in flakey_iterate_devices()  local
396 	return fn(ti, fc->dev, fc->start, ti->len, data);  in flakey_iterate_devices()