24 static inline struct dev_info *which_dev(struct mddev *mddev, sector_t sector)  in which_dev()  argument
30 	hi = mddev->raid_disks - 1;  in which_dev()
31 	conf = mddev->private;  in which_dev()
49 static sector_t linear_size(struct mddev *mddev, sector_t sectors, int raid_disks)  in linear_size()  argument
54 	conf = mddev->private;  in linear_size()
62 static struct linear_conf *linear_conf(struct mddev *mddev, int raid_disks)  in linear_conf()  argument
76 	rdev_for_each(rdev, mddev) {  in linear_conf()
83 				mdname(mddev));  in linear_conf()
88 		if (mddev->chunk_sectors) {  in linear_conf()
90 			sector_div(sectors, mddev->chunk_sectors);  in linear_conf()
91 			rdev->sectors = sectors * mddev->chunk_sectors;  in linear_conf()
94 		disk_stack_limits(mddev->gendisk, rdev->bdev,  in linear_conf()
105 			mdname(mddev));  in linear_conf()
110 		blk_queue_flag_clear(QUEUE_FLAG_DISCARD, mddev->queue);  in linear_conf()
112 		blk_queue_flag_set(QUEUE_FLAG_DISCARD, mddev->queue);  in linear_conf()
144 static int linear_run (struct mddev *mddev)  in linear_run()  argument
149 	if (md_check_no_bitmap(mddev))  in linear_run()
151 	conf = linear_conf(mddev, mddev->raid_disks);  in linear_run()
155 	mddev->private = conf;  in linear_run()
156 	md_set_array_sectors(mddev, linear_size(mddev, 0, 0));  in linear_run()
158 	ret =  md_integrity_register(mddev);  in linear_run()
161 		mddev->private = NULL;  in linear_run()
166 static int linear_add(struct mddev *mddev, struct md_rdev *rdev)  in linear_add()  argument
178 	if (rdev->saved_raid_disk != mddev->raid_disks)  in linear_add()
184 	newconf = linear_conf(mddev,mddev->raid_disks+1);  in linear_add()
195 	mddev_suspend(mddev);  in linear_add()
196 	oldconf = rcu_dereference_protected(mddev->private,  in linear_add()
197 			lockdep_is_held(&mddev->reconfig_mutex));  in linear_add()
198 	mddev->raid_disks++;  in linear_add()
199 	WARN_ONCE(mddev->raid_disks != newconf->raid_disks,  in linear_add()
201 	rcu_assign_pointer(mddev->private, newconf);  in linear_add()
202 	md_set_array_sectors(mddev, linear_size(mddev, 0, 0));  in linear_add()
203 	set_capacity(mddev->gendisk, mddev->array_sectors);  in linear_add()
204 	mddev_resume(mddev);  in linear_add()
205 	revalidate_disk_size(mddev->gendisk, true);  in linear_add()
210 static void linear_free(struct mddev *mddev, void *priv)  in linear_free()  argument
217 static bool linear_make_request(struct mddev *mddev, struct bio *bio)  in linear_make_request()  argument
225 	    && md_flush_request(mddev, bio))  in linear_make_request()
228 	tmp_dev = which_dev(mddev, bio_sector);  in linear_make_request()
245 					      GFP_NOIO, &mddev->bio_set);  in linear_make_request()
260 		if (mddev->gendisk)  in linear_make_request()
262 					      bio, disk_devt(mddev->gendisk),  in linear_make_request()
264 		mddev_check_writesame(mddev, bio);  in linear_make_request()
265 		mddev_check_write_zeroes(mddev, bio);  in linear_make_request()
272 	       mdname(mddev),  in linear_make_request()
281 static void linear_status (struct seq_file *seq, struct mddev *mddev)  in linear_status()  argument
283 	seq_printf(seq, " %dk rounding", mddev->chunk_sectors / 2);  in linear_status()
286 static void linear_quiesce(struct mddev *mddev, int state)  in linear_quiesce()  argument