block: pass a gendisk on bdev_check_media_change

bdev_check_media_change should only ever be called for the whole device.
Pass a gendisk to make that explicit and rename the function to
disk_check_media_change.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Acked-by: Christian Brauner <brauner@kernel.org>
Link: https://lore.kernel.org/r/20230608110258.189493-8-hch@lst.de
Signed-off-by: Jens Axboe <axboe@kernel.dk>

block/disk-events.c

@@ -263,31 +263,31 @@ static unsigned int disk_clear_events(struct gendisk *disk, unsigned int mask)
 }
 
 /**
- * bdev_check_media_change - check if a removable media has been changed
- * @bdev: block device to check
+ * disk_check_media_change - check if a removable media has been changed
+ * @disk: gendisk to check
  *
  * Check whether a removable media has been changed, and attempt to free all
  * dentries and inodes and invalidates all block device page cache entries in
  * that case.
  *
- * Returns %true if the block device changed, or %false if not.
+ * Returns %true if the media has changed, or %false if not.
  */
-bool bdev_check_media_change(struct block_device *bdev)
+bool disk_check_media_change(struct gendisk *disk)
 {
 	unsigned int events;
 
-	events = disk_clear_events(bdev->bd_disk, DISK_EVENT_MEDIA_CHANGE |
+	events = disk_clear_events(disk, DISK_EVENT_MEDIA_CHANGE |
 				   DISK_EVENT_EJECT_REQUEST);
 	if (!(events & DISK_EVENT_MEDIA_CHANGE))
 		return false;
 
-	if (__invalidate_device(bdev, true))
+	if (__invalidate_device(disk->part0, true))
 		pr_warn("VFS: busy inodes on changed media %s\n",
-			bdev->bd_disk->disk_name);
-	set_bit(GD_NEED_PART_SCAN, &bdev->bd_disk->state);
+			disk->disk_name);
+	set_bit(GD_NEED_PART_SCAN, &disk->state);
 	return true;
 }
-EXPORT_SYMBOL(bdev_check_media_change);
+EXPORT_SYMBOL(disk_check_media_change);
 
 /**
  * disk_force_media_change - force a media change event

drivers/block/amiflop.c

@@ -1675,7 +1675,7 @@ static int floppy_open(struct block_device *bdev, fmode_t mode)
 	}
 
 	if (mode & (FMODE_READ|FMODE_WRITE)) {
-		bdev_check_media_change(bdev);
+		disk_check_media_change(bdev->bd_disk);
 		if (mode & FMODE_WRITE) {
 			int wrprot;
 

drivers/block/ataflop.c

@@ -1760,8 +1760,8 @@ static int fd_locked_ioctl(struct block_device *bdev, fmode_t mode,
 		/* invalidate the buffer track to force a reread */
 		BufferDrive = -1;
 		set_bit(drive, &fake_change);
-		if (bdev_check_media_change(bdev))
-			floppy_revalidate(bdev->bd_disk);
+		if (disk_check_media_change(disk))
+			floppy_revalidate(disk);
 		return 0;
 	default:
 		return -EINVAL;
@@ -1938,7 +1938,7 @@ static int floppy_open(struct block_device *bdev, fmode_t mode)
 		return 0;
 
 	if (mode & (FMODE_READ|FMODE_WRITE)) {
-		if (bdev_check_media_change(bdev))
+		if (disk_check_media_change(bdev->bd_disk))
 			floppy_revalidate(bdev->bd_disk);
 		if (mode & FMODE_WRITE) {
 			if (p->wpstat) {

drivers/block/floppy.c

@@ -3210,13 +3210,13 @@ static int floppy_raw_cmd_ioctl(int type, int drive, int cmd,
 
 #endif
 
-static int invalidate_drive(struct block_device *bdev)
+static int invalidate_drive(struct gendisk *disk)
 {
 	/* invalidate the buffer track to force a reread */
-	set_bit((long)bdev->bd_disk->private_data, &fake_change);
+	set_bit((long)disk->private_data, &fake_change);
 	process_fd_request();
-	if (bdev_check_media_change(bdev))
-		floppy_revalidate(bdev->bd_disk);
+	if (disk_check_media_change(disk))
+		floppy_revalidate(disk);
 	return 0;
 }
 
@@ -3287,7 +3287,7 @@ static int set_geometry(unsigned int cmd, struct floppy_struct *g,
 		    drive_state[current_drive].maxtrack ||
 		    ((user_params[drive].sect ^ oldStretch) &
 		     (FD_SWAPSIDES | FD_SECTBASEMASK)))
-			invalidate_drive(bdev);
+			invalidate_drive(bdev->bd_disk);
 		else
 			process_fd_request();
 	}
@@ -3464,7 +3464,7 @@ static int fd_locked_ioctl(struct block_device *bdev, fmode_t mode, unsigned int
 		current_type[drive] = NULL;
 		floppy_sizes[drive] = MAX_DISK_SIZE << 1;
 		drive_state[drive].keep_data = 0;
-		return invalidate_drive(bdev);
+		return invalidate_drive(bdev->bd_disk);
 	case FDSETPRM:
 	case FDDEFPRM:
 		return set_geometry(cmd, &inparam.g, drive, type, bdev);
@@ -3503,7 +3503,7 @@ static int fd_locked_ioctl(struct block_device *bdev, fmode_t mode, unsigned int
 	case FDFLUSH:
 		if (lock_fdc(drive))
 			return -EINTR;
-		return invalidate_drive(bdev);
+		return invalidate_drive(bdev->bd_disk);
 	case FDSETEMSGTRESH:
 		drive_params[drive].max_errors.reporting = (unsigned short)(param & 0x0f);
 		return 0;
@@ -4054,7 +4054,7 @@ static int floppy_open(struct block_device *bdev, fmode_t mode)
 			drive_state[drive].last_checked = 0;
 			clear_bit(FD_OPEN_SHOULD_FAIL_BIT,
 				  &drive_state[drive].flags);
-			if (bdev_check_media_change(bdev))
+			if (disk_check_media_change(bdev->bd_disk))
 				floppy_revalidate(bdev->bd_disk);
 			if (test_bit(FD_DISK_CHANGED_BIT, &drive_state[drive].flags))
 				goto out;

drivers/block/swim.c

@@ -640,7 +640,7 @@ static int floppy_open(struct block_device *bdev, fmode_t mode)
 		return 0;
 
 	if (mode & (FMODE_READ|FMODE_WRITE)) {
-		if (bdev_check_media_change(bdev) && fs->disk_in)
+		if (disk_check_media_change(bdev->bd_disk) && fs->disk_in)
 			fs->ejected = 0;
 		if ((mode & FMODE_WRITE) && fs->write_protected) {
 			err = -EROFS;

drivers/block/swim3.c

@@ -963,7 +963,7 @@ static int floppy_open(struct block_device *bdev, fmode_t mode)
 
 	if (err == 0 && (mode & FMODE_NDELAY) == 0
 	    && (mode & (FMODE_READ|FMODE_WRITE))) {
-		if (bdev_check_media_change(bdev))
+		if (disk_check_media_change(bdev->bd_disk))
 			floppy_revalidate(bdev->bd_disk);
 		if (fs->ejected)
 			err = -ENXIO;

drivers/cdrom/gdrom.c

@@ -478,7 +478,7 @@ static int gdrom_bdops_open(struct block_device *bdev, fmode_t mode)
 {
 	int ret;
 
-	bdev_check_media_change(bdev);
+	disk_check_media_change(bdev->bd_disk);
 
 	mutex_lock(&gdrom_mutex);
 	ret = cdrom_open(gd.cd_info);

drivers/md/md.c

@@ -7789,7 +7789,7 @@ static int md_open(struct block_device *bdev, fmode_t mode)
 	atomic_inc(&mddev->openers);
 	mutex_unlock(&mddev->open_mutex);
 
-	bdev_check_media_change(bdev);
+	disk_check_media_change(bdev->bd_disk);
 	return 0;
 
 out_unlock:

drivers/scsi/sd.c

@@ -1280,11 +1280,10 @@ static void sd_uninit_command(struct scsi_cmnd *SCpnt)
 		mempool_free(rq->special_vec.bv_page, sd_page_pool);
 }
 
-static bool sd_need_revalidate(struct block_device *bdev,
-		struct scsi_disk *sdkp)
+static bool sd_need_revalidate(struct gendisk *disk, struct scsi_disk *sdkp)
 {
 	if (sdkp->device->removable || sdkp->write_prot) {
-		if (bdev_check_media_change(bdev))
+		if (disk_check_media_change(disk))
 			return true;
 	}
 
@@ -1293,7 +1292,7 @@ static bool sd_need_revalidate(struct block_device *bdev,
 	 * nothing to do with partitions, BLKRRPART is used to force a full
 	 * revalidate after things like a format for historical reasons.
 	 */
-	return test_bit(GD_NEED_PART_SCAN, &bdev->bd_disk->state);
+	return test_bit(GD_NEED_PART_SCAN, &disk->state);
 }
 
 /**
@@ -1330,7 +1329,7 @@ static int sd_open(struct block_device *bdev, fmode_t mode)
 	if (!scsi_block_when_processing_errors(sdev))
 		goto error_out;
 
-	if (sd_need_revalidate(bdev, sdkp))
+	if (sd_need_revalidate(bdev->bd_disk, sdkp))
 		sd_revalidate_disk(bdev->bd_disk);
 
 	/*

drivers/scsi/sr.c

@@ -494,7 +494,7 @@ static int sr_block_open(struct block_device *bdev, fmode_t mode)
 		return -ENXIO;
 
 	scsi_autopm_get_device(sdev);
-	if (bdev_check_media_change(bdev))
+	if (disk_check_media_change(bdev->bd_disk))
 		sr_revalidate_disk(cd);
 
 	mutex_lock(&cd->lock);

include/linux/blkdev.h

@@ -817,7 +817,7 @@ int __register_blkdev(unsigned int major, const char *name,
 	__register_blkdev(major, name, NULL)
 void unregister_blkdev(unsigned int major, const char *name);
 
-bool bdev_check_media_change(struct block_device *bdev);
+bool disk_check_media_change(struct gendisk *disk);
 int __invalidate_device(struct block_device *bdev, bool kill_dirty);
 void set_capacity(struct gendisk *disk, sector_t size);