block: replace fmode_t with a block-specific type for block open flags

The only overlap between the block open flags mapped into the fmode_t and
other uses of fmode_t are FMODE_READ and FMODE_WRITE. Define a new
blk_mode_t instead for use in blkdev_get_by_{dev,path}, ->open and
->ioctl and stop abusing fmode_t.

Signed-off-by: Christoph Hellwig <[e-mail]>
Acked-by: Jack Wang <[e-mail]> [rnbd]
Reviewed-by: Hannes Reinecke <[e-mail]>
Reviewed-by: Christian Brauner <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Jens Axboe <[e-mail]>

arch/um/drivers/ubd_kern.c

···
 static DEFINE_MUTEX(ubd_lock);
 static DEFINE_MUTEX(ubd_mutex); /* replaces BKL, might not be needed */
 
-static int ubd_open(struct gendisk *disk, fmode_t mode);
+static int ubd_open(struct gendisk *disk, blk_mode_t mode);
 static void ubd_release(struct gendisk *disk);
-static int ubd_ioctl(struct block_device *bdev, fmode_t mode,
+static int ubd_ioctl(struct block_device *bdev, blk_mode_t mode,
 		     unsigned int cmd, unsigned long arg);
 static int ubd_getgeo(struct block_device *bdev, struct hd_geometry *geo);
 
···
 
 device_initcall(ubd_driver_init);
 
-static int ubd_open(struct gendisk *disk, fmode_t mode)
+static int ubd_open(struct gendisk *disk, blk_mode_t mode)
 {
 	struct ubd *ubd_dev = disk->private_data;
 	int err = 0;
···
 	return 0;
 }
 
-static int ubd_ioctl(struct block_device *bdev, fmode_t mode,
+static int ubd_ioctl(struct block_device *bdev, blk_mode_t mode,
 		     unsigned int cmd, unsigned long arg)
 {
 	struct ubd *ubd_dev = bdev->bd_disk->private_data;

arch/xtensa/platforms/iss/simdisk.c

···
 	bio_endio(bio);
 }
 
-static int simdisk_open(struct gendisk *disk, fmode_t mode)
+static int simdisk_open(struct gendisk *disk, blk_mode_t mode)
 {
 	struct simdisk *dev = disk->private_data;
 

block/bdev.c

···
  * Drop all buffers & page cache for given bdev range. This function bails
  * with error if bdev has other exclusive owner (such as filesystem).
  */
-int truncate_bdev_range(struct block_device *bdev, fmode_t mode,
+int truncate_bdev_range(struct block_device *bdev, blk_mode_t mode,
 			loff_t lstart, loff_t lend)
 {
 	/*
···
 	 * while we discard the buffer cache to avoid discarding buffers
 	 * under live filesystem.
 	 */
-	if (!(mode & FMODE_EXCL)) {
+	if (!(mode & BLK_OPEN_EXCL)) {
 		int err = bd_prepare_to_claim(bdev, truncate_bdev_range, NULL);
 		if (err)
 			goto invalidate;
 	}
 
 	truncate_inode_pages_range(bdev->bd_inode->i_mapping, lstart, lend);
-	if (!(mode & FMODE_EXCL))
+	if (!(mode & BLK_OPEN_EXCL))
 		bd_abort_claiming(bdev, truncate_bdev_range);
 	return 0;
 
···
 	bdev_write_inode(bdev);
 }
 
-static int blkdev_get_whole(struct block_device *bdev, fmode_t mode)
+static int blkdev_get_whole(struct block_device *bdev, blk_mode_t mode)
 {
 	struct gendisk *disk = bdev->bd_disk;
 	int ret;
···
 		bdev->bd_disk->fops->release(bdev->bd_disk);
 }
 
-static int blkdev_get_part(struct block_device *part, fmode_t mode)
+static int blkdev_get_part(struct block_device *part, blk_mode_t mode)
 {
 	struct gendisk *disk = part->bd_disk;
 	int ret;
···
 {
 	put_device(&bdev->bd_device);
 }
-
+	
 /**
  * blkdev_get_by_dev - open a block device by device number
  * @dev: device number of block device to open
- * @mode: FMODE_* mask
+ * @mode: open mode (BLK_OPEN_*)
  * @holder: exclusive holder identifier
  * @hops: holder operations
  *
···
  * RETURNS:
  * Reference to the block_device on success, ERR_PTR(-errno) on failure.
  */
-struct block_device *blkdev_get_by_dev(dev_t dev, fmode_t mode, void *holder,
+struct block_device *blkdev_get_by_dev(dev_t dev, blk_mode_t mode, void *holder,
 		const struct blk_holder_ops *hops)
 {
 	bool unblock_events = true;
···
 
 	ret = devcgroup_check_permission(DEVCG_DEV_BLOCK,
 			MAJOR(dev), MINOR(dev),
-			((mode & FMODE_READ) ? DEVCG_ACC_READ : 0) |
-			((mode & FMODE_WRITE) ? DEVCG_ACC_WRITE : 0));
+			((mode & BLK_OPEN_READ) ? DEVCG_ACC_READ : 0) |
+			((mode & BLK_OPEN_WRITE) ? DEVCG_ACC_WRITE : 0));
 	if (ret)
 		return ERR_PTR(ret);
 
···
 	disk = bdev->bd_disk;
 
 	if (holder) {
-		mode |= FMODE_EXCL;
+		mode |= BLK_OPEN_EXCL;
 		ret = bd_prepare_to_claim(bdev, holder, hops);
 		if (ret)
 			goto put_blkdev;
 	} else {
-		if (WARN_ON_ONCE(mode & FMODE_EXCL)) {
+		if (WARN_ON_ONCE(mode & BLK_OPEN_EXCL)) {
 			ret = -EIO;
 			goto put_blkdev;
 		}
···
 		 * writeable reference is too fragile given the way @mode is
 		 * used in blkdev_get/put().
 		 */
-		if ((mode & FMODE_WRITE) && !bdev->bd_write_holder &&
+		if ((mode & BLK_OPEN_WRITE) && !bdev->bd_write_holder &&
 		    (disk->event_flags & DISK_EVENT_FLAG_BLOCK_ON_EXCL_WRITE)) {
 			bdev->bd_write_holder = true;
 			unblock_events = false;
···
 /**
  * blkdev_get_by_path - open a block device by name
  * @path: path to the block device to open
- * @mode: FMODE_* mask
+ * @mode: open mode (BLK_OPEN_*)
  * @holder: exclusive holder identifier
  *
  * Open the block device described by the device file at @path.  If @holder is
···
  * RETURNS:
  * Reference to the block_device on success, ERR_PTR(-errno) on failure.
  */
-struct block_device *blkdev_get_by_path(const char *path, fmode_t mode,
+struct block_device *blkdev_get_by_path(const char *path, blk_mode_t mode,
 		void *holder, const struct blk_holder_ops *hops)
 {
 	struct block_device *bdev;
···
 		return ERR_PTR(error);
 
 	bdev = blkdev_get_by_dev(dev, mode, holder, hops);
-	if (!IS_ERR(bdev) && (mode & FMODE_WRITE) && bdev_read_only(bdev)) {
+	if (!IS_ERR(bdev) && (mode & BLK_OPEN_WRITE) && bdev_read_only(bdev)) {
 		blkdev_put(bdev, holder);
 		return ERR_PTR(-EACCES);
 	}

block/blk-zoned.c

···
 	return 0;
 }
 
-static int blkdev_truncate_zone_range(struct block_device *bdev, fmode_t mode,
-				      const struct blk_zone_range *zrange)
+static int blkdev_truncate_zone_range(struct block_device *bdev,
+		blk_mode_t mode, const struct blk_zone_range *zrange)
 {
 	loff_t start, end;
 
···
  * BLKRESETZONE, BLKOPENZONE, BLKCLOSEZONE and BLKFINISHZONE ioctl processing.
  * Called from blkdev_ioctl.
  */
-int blkdev_zone_mgmt_ioctl(struct block_device *bdev, fmode_t mode,
+int blkdev_zone_mgmt_ioctl(struct block_device *bdev, blk_mode_t mode,
 			   unsigned int cmd, unsigned long arg)
 {
 	void __user *argp = (void __user *)arg;
···
 	if (!bdev_is_zoned(bdev))
 		return -ENOTTY;
 
-	if (!(mode & FMODE_WRITE))
+	if (!(mode & BLK_OPEN_WRITE))
 		return -EBADF;
 
 	if (copy_from_user(&zrange, argp, sizeof(struct blk_zone_range)))

block/blk.h

···
 void disk_clear_zone_settings(struct gendisk *disk);
 int blkdev_report_zones_ioctl(struct block_device *bdev, unsigned int cmd,
 		unsigned long arg);
-int blkdev_zone_mgmt_ioctl(struct block_device *bdev, fmode_t mode,
+int blkdev_zone_mgmt_ioctl(struct block_device *bdev, blk_mode_t mode,
 		unsigned int cmd, unsigned long arg);
 #else /* CONFIG_BLK_DEV_ZONED */
 static inline void disk_free_zone_bitmaps(struct gendisk *disk) {}
···
 	return -ENOTTY;
 }
 static inline int blkdev_zone_mgmt_ioctl(struct block_device *bdev,
-		fmode_t mode, unsigned int cmd, unsigned long arg)
+		blk_mode_t mode, unsigned int cmd, unsigned long arg)
 {
 	return -ENOTTY;
 }
···
 
 struct request_queue *blk_alloc_queue(int node_id);
 
-int disk_scan_partitions(struct gendisk *disk, fmode_t mode);
+int disk_scan_partitions(struct gendisk *disk, blk_mode_t mode);
 
 int disk_alloc_events(struct gendisk *disk);
 void disk_add_events(struct gendisk *disk);
···
 
 extern struct attribute_group blk_trace_attr_group;
 
-int truncate_bdev_range(struct block_device *bdev, fmode_t mode, loff_t lstart,
-		loff_t lend);
+blk_mode_t file_to_blk_mode(struct file *file);
+int truncate_bdev_range(struct block_device *bdev, blk_mode_t mode,
+		loff_t lstart, loff_t lend);
 long blkdev_ioctl(struct file *file, unsigned cmd, unsigned long arg);
 long compat_blkdev_ioctl(struct file *file, unsigned cmd, unsigned long arg);
 

block/fops.c

···
 	return error;
 }
 
+blk_mode_t file_to_blk_mode(struct file *file)
+{
+	blk_mode_t mode = 0;
+
+	if (file->f_mode & FMODE_READ)
+		mode |= BLK_OPEN_READ;
+	if (file->f_mode & FMODE_WRITE)
+		mode |= BLK_OPEN_WRITE;
+	if (file->f_mode & FMODE_EXCL)
+		mode |= BLK_OPEN_EXCL;
+	if (file->f_flags & O_NDELAY)
+		mode |= BLK_OPEN_NDELAY;
+
+	/*
+	 * If all bits in O_ACCMODE set (aka O_RDWR | O_WRONLY), the floppy
+	 * driver has historically allowed ioctls as if the file was opened for
+	 * writing, but does not allow and actual reads or writes.
+	 */
+	if ((file->f_flags & O_ACCMODE) == (O_RDWR | O_WRONLY))
+		mode |= BLK_OPEN_WRITE_IOCTL;
+
+	return mode;
+}
+
 static int blkdev_open(struct inode *inode, struct file *filp)
 {
 	struct block_device *bdev;
···
 	filp->f_flags |= O_LARGEFILE;
 	filp->f_mode |= FMODE_NOWAIT | FMODE_BUF_RASYNC;
 
-	if (filp->f_flags & O_NDELAY)
-		filp->f_mode |= FMODE_NDELAY;
 	if (filp->f_flags & O_EXCL)
 		filp->f_mode |= FMODE_EXCL;
-	if ((filp->f_flags & O_ACCMODE) == 3)
-		filp->f_mode |= FMODE_WRITE_IOCTL;
 
-	bdev = blkdev_get_by_dev(inode->i_rdev, filp->f_mode,
+	bdev = blkdev_get_by_dev(inode->i_rdev, file_to_blk_mode(filp),
 				 (filp->f_mode & FMODE_EXCL) ? filp : NULL,
 				 NULL);
 	if (IS_ERR(bdev))
···
 	filemap_invalidate_lock(inode->i_mapping);
 
 	/* Invalidate the page cache, including dirty pages. */
-	error = truncate_bdev_range(bdev, file->f_mode, start, end);
+	error = truncate_bdev_range(bdev, file_to_blk_mode(file), start, end);
 	if (error)
 		goto fail;
 

block/genhd.c

···
 }
 EXPORT_SYMBOL_GPL(disk_uevent);
 
-int disk_scan_partitions(struct gendisk *disk, fmode_t mode)
+int disk_scan_partitions(struct gendisk *disk, blk_mode_t mode)
 {
 	struct block_device *bdev;
 	int ret = 0;
···
 	 * synchronize with other exclusive openers and other partition
 	 * scanners.
 	 */
-	if (!(mode & FMODE_EXCL)) {
+	if (!(mode & BLK_OPEN_EXCL)) {
 		ret = bd_prepare_to_claim(disk->part0, disk_scan_partitions,
 					  NULL);
 		if (ret)
···
 	 * creat partition for underlying disk.
 	 */
 	clear_bit(GD_NEED_PART_SCAN, &disk->state);
-	if (!(mode & FMODE_EXCL))
+	if (!(mode & BLK_OPEN_EXCL))
 		bd_abort_claiming(disk->part0, disk_scan_partitions);
 	return ret;
 }
···
 
 		bdev_add(disk->part0, ddev->devt);
 		if (get_capacity(disk))
-			disk_scan_partitions(disk, FMODE_READ);
+			disk_scan_partitions(disk, BLK_OPEN_READ);
 
 		/*
 		 * Announce the disk and partitions after all partitions are

block/ioctl.c

···
 }
 #endif
 
-static int blk_ioctl_discard(struct block_device *bdev, fmode_t mode,
+static int blk_ioctl_discard(struct block_device *bdev, blk_mode_t mode,
 		unsigned long arg)
 {
 	uint64_t range[2];
···
 	struct inode *inode = bdev->bd_inode;
 	int err;
 
-	if (!(mode & FMODE_WRITE))
+	if (!(mode & BLK_OPEN_WRITE))
 		return -EBADF;
 
 	if (!bdev_max_discard_sectors(bdev))
···
 	return err;
 }
 
-static int blk_ioctl_secure_erase(struct block_device *bdev, fmode_t mode,
+static int blk_ioctl_secure_erase(struct block_device *bdev, blk_mode_t mode,
 		void __user *argp)
 {
 	uint64_t start, len;
 	uint64_t range[2];
 	int err;
 
-	if (!(mode & FMODE_WRITE))
+	if (!(mode & BLK_OPEN_WRITE))
 		return -EBADF;
 	if (!bdev_max_secure_erase_sectors(bdev))
 		return -EOPNOTSUPP;
···
 }
 
 
-static int blk_ioctl_zeroout(struct block_device *bdev, fmode_t mode,
+static int blk_ioctl_zeroout(struct block_device *bdev, blk_mode_t mode,
 		unsigned long arg)
 {
 	uint64_t range[2];
···
 	struct inode *inode = bdev->bd_inode;
 	int err;
 
-	if (!(mode & FMODE_WRITE))
+	if (!(mode & BLK_OPEN_WRITE))
 		return -EBADF;
 
 	if (copy_from_user(range, (void __user *)arg, sizeof(range)))
···
  * drivers that implement only commands that are completely compatible
  * between 32-bit and 64-bit user space
  */
-int blkdev_compat_ptr_ioctl(struct block_device *bdev, fmode_t mode,
+int blkdev_compat_ptr_ioctl(struct block_device *bdev, blk_mode_t mode,
 			unsigned cmd, unsigned long arg)
 {
 	struct gendisk *disk = bdev->bd_disk;
···
 #endif
 
 /* set the logical block size */
-static int blkdev_bszset(struct block_device *bdev, fmode_t mode,
+static int blkdev_bszset(struct block_device *bdev, blk_mode_t mode,
 		int __user *argp)
 {
 	int ret, n;
···
 	if (get_user(n, argp))
 		return -EFAULT;
 
-	if (mode & FMODE_EXCL)
+	if (mode & BLK_OPEN_EXCL)
 		return set_blocksize(bdev, n);
 
 	if (IS_ERR(blkdev_get_by_dev(bdev->bd_dev, mode, &bdev, NULL)))
···
  * user space. Note the separate arg/argp parameters that are needed
  * to deal with the compat_ptr() conversion.
  */
-static int blkdev_common_ioctl(struct block_device *bdev, fmode_t mode,
+static int blkdev_common_ioctl(struct block_device *bdev, blk_mode_t mode,
 			       unsigned int cmd, unsigned long arg,
 			       void __user *argp)
 {
···
 {
 	struct block_device *bdev = I_BDEV(file->f_mapping->host);
 	void __user *argp = (void __user *)arg;
-	fmode_t mode = file->f_mode;
+	blk_mode_t mode = file_to_blk_mode(file);
 	int ret;
-
-	/*
-	 * O_NDELAY can be altered using fcntl(.., F_SETFL, ..), so we have
-	 * to updated it before every ioctl.
-	 */
-	if (file->f_flags & O_NDELAY)
-		mode |= FMODE_NDELAY;
-	else
-		mode &= ~FMODE_NDELAY;
 
 	switch (cmd) {
 	/* These need separate implementations for the data structure */
···
 	void __user *argp = compat_ptr(arg);
 	struct block_device *bdev = I_BDEV(file->f_mapping->host);
 	struct gendisk *disk = bdev->bd_disk;
-	fmode_t mode = file->f_mode;
-
-	/*
-	 * O_NDELAY can be altered using fcntl(.., F_SETFL, ..), so we have
-	 * to updated it before every ioctl.
-	 */
-	if (file->f_flags & O_NDELAY)
-		mode |= FMODE_NDELAY;
-	else
-		mode &= ~FMODE_NDELAY;
+	blk_mode_t mode = file_to_blk_mode(file);
 
 	switch (cmd) {
 	/* These need separate implementations for the data structure */

drivers/block/amiflop.c

···
 	return 0;
 }
 
-static int fd_locked_ioctl(struct block_device *bdev, fmode_t mode,
+static int fd_locked_ioctl(struct block_device *bdev, blk_mode_t mode,
 		    unsigned int cmd, unsigned long param)
 {
 	struct amiga_floppy_struct *p = bdev->bd_disk->private_data;
···
 	return 0;
 }
 
-static int fd_ioctl(struct block_device *bdev, fmode_t mode,
+static int fd_ioctl(struct block_device *bdev, blk_mode_t mode,
 			     unsigned int cmd, unsigned long param)
 {
 	int ret;
···
  * /dev/PS0 etc), and disallows simultaneous access to the same
  * drive with different device numbers.
  */
-static int floppy_open(struct gendisk *disk, fmode_t mode)
+static int floppy_open(struct gendisk *disk, blk_mode_t mode)
 {
 	int drive = disk->first_minor & 3;
 	int system = (disk->first_minor & 4) >> 2;
···
 		mutex_unlock(&amiflop_mutex);
 		return -ENXIO;
 	}
-
-	if (mode & (FMODE_READ|FMODE_WRITE)) {
+	if (mode & (BLK_OPEN_READ | BLK_OPEN_WRITE)) {
 		disk_check_media_change(disk);
-		if (mode & FMODE_WRITE) {
+		if (mode & BLK_OPEN_WRITE) {
 			int wrprot;
 
 			get_fdc(drive);
···
 			}
 		}
 	}
-
 	local_irq_save(flags);
 	fd_ref[drive]++;
 	fd_device[drive] = system;

drivers/block/aoe/aoeblk.c

···
 }
 
 static int
-aoeblk_open(struct gendisk *disk, fmode_t mode)
+aoeblk_open(struct gendisk *disk, blk_mode_t mode)
 {
 	struct aoedev *d = disk->private_data;
 	ulong flags;
···
 }
 
 static int
-aoeblk_ioctl(struct block_device *bdev, fmode_t mode, uint cmd, ulong arg)
+aoeblk_ioctl(struct block_device *bdev, blk_mode_t mode, uint cmd, ulong arg)
 {
 	struct aoedev *d;
 

drivers/block/ataflop.c

···
 static void finish_fdc( void );
 static void finish_fdc_done( int dummy );
 static void setup_req_params( int drive );
-static int fd_locked_ioctl(struct block_device *bdev, fmode_t mode, unsigned int
-                     cmd, unsigned long param);
+static int fd_locked_ioctl(struct block_device *bdev, blk_mode_t mode,
+		unsigned int cmd, unsigned long param);
 static void fd_probe( int drive );
 static int fd_test_drive_present( int drive );
 static void config_types( void );
-static int floppy_open(struct gendisk *disk, fmode_t mode);
+static int floppy_open(struct gendisk *disk, blk_mode_t mode);
 static void floppy_release(struct gendisk *disk);
 
 /************************* End of Prototypes **************************/
···
 	return BLK_STS_OK;
 }
 
-static int fd_locked_ioctl(struct block_device *bdev, fmode_t mode,
+static int fd_locked_ioctl(struct block_device *bdev, blk_mode_t mode,
 		    unsigned int cmd, unsigned long param)
 {
 	struct gendisk *disk = bdev->bd_disk;
···
 	}
 }
 
-static int fd_ioctl(struct block_device *bdev, fmode_t mode,
+static int fd_ioctl(struct block_device *bdev, blk_mode_t mode,
 			     unsigned int cmd, unsigned long arg)
 {
 	int ret;
···
  * drive with different device numbers.
  */
 
-static int floppy_open(struct gendisk *disk, fmode_t mode)
+static int floppy_open(struct gendisk *disk, blk_mode_t mode)
 {
 	struct atari_floppy_struct *p = disk->private_data;
 	int type = disk->first_minor >> 2;
···
 	if (p->ref && p->type != type)
 		return -EBUSY;
 
-	if (p->ref == -1 || (p->ref && mode & FMODE_EXCL))
+	if (p->ref == -1 || (p->ref && mode & BLK_OPEN_EXCL))
 		return -EBUSY;
-
-	if (mode & FMODE_EXCL)
+	if (mode & BLK_OPEN_EXCL)
 		p->ref = -1;
 	else
 		p->ref++;
 
 	p->type = type;
 
-	if (mode & FMODE_NDELAY)
+	if (mode & BLK_OPEN_NDELAY)
 		return 0;
 
-	if (mode & (FMODE_READ|FMODE_WRITE)) {
+	if (mode & (BLK_OPEN_READ | BLK_OPEN_WRITE)) {
 		if (disk_check_media_change(disk))
 			floppy_revalidate(disk);
-		if (mode & FMODE_WRITE) {
+		if (mode & BLK_OPEN_WRITE) {
 			if (p->wpstat) {
 				if (p->ref < 0)
 					p->ref = 0;
···
 	return 0;
 }
 
-static int floppy_unlocked_open(struct gendisk *disk, fmode_t mode)
+static int floppy_unlocked_open(struct gendisk *disk, blk_mode_t mode)
 {
 	int ret;
 

drivers/block/drbd/drbd_main.c

···
 #include "drbd_debugfs.h"
 
 static DEFINE_MUTEX(drbd_main_mutex);
-static int drbd_open(struct gendisk *disk, fmode_t mode);
+static int drbd_open(struct gendisk *disk, blk_mode_t mode);
 static void drbd_release(struct gendisk *gd);
 static void md_sync_timer_fn(struct timer_list *t);
 static int w_bitmap_io(struct drbd_work *w, int unused);
···
 	return 0;
 }
 
-static int drbd_open(struct gendisk *disk, fmode_t mode)
+static int drbd_open(struct gendisk *disk, blk_mode_t mode)
 {
 	struct drbd_device *device = disk->private_data;
 	unsigned long flags;
···
 	 * and no race with updating open_cnt */
 
 	if (device->state.role != R_PRIMARY) {
-		if (mode & FMODE_WRITE)
+		if (mode & BLK_OPEN_WRITE)
 			rv = -EROFS;
 		else if (!drbd_allow_oos)
 			rv = -EMEDIUMTYPE;
···
 static void drbd_release(struct gendisk *gd)
 {
 	struct drbd_device *device = gd->private_data;
+
 	mutex_lock(&drbd_main_mutex);
 	device->open_cnt--;
 	mutex_unlock(&drbd_main_mutex);

drivers/block/drbd/drbd_nl.c

···
 	struct block_device *bdev;
 	int err = 0;
 
-	bdev = blkdev_get_by_path(bdev_path, FMODE_READ | FMODE_WRITE,
+	bdev = blkdev_get_by_path(bdev_path, BLK_OPEN_READ | BLK_OPEN_WRITE,
 				  claim_ptr, NULL);
 	if (IS_ERR(bdev)) {
 		drbd_err(device, "open(\"%s\") failed with %ld\n",

drivers/block/floppy.c

···
 	return true;
 }
 
-static int fd_locked_ioctl(struct block_device *bdev, fmode_t mode, unsigned int cmd,
-		    unsigned long param)
+static int fd_locked_ioctl(struct block_device *bdev, blk_mode_t mode,
+		unsigned int cmd, unsigned long param)
 {
 	int drive = (long)bdev->bd_disk->private_data;
 	int type = ITYPE(drive_state[drive].fd_device);
···
 		return ret;
 
 	/* permission checks */
-	if (((cmd & 0x40) && !(mode & (FMODE_WRITE | FMODE_WRITE_IOCTL))) ||
+	if (((cmd & 0x40) &&
+	     !(mode & (BLK_OPEN_WRITE | BLK_OPEN_WRITE_IOCTL))) ||
 	    ((cmd & 0x80) && !capable(CAP_SYS_ADMIN)))
 		return -EPERM;
 
···
 	return 0;
 }
 
-static int fd_ioctl(struct block_device *bdev, fmode_t mode,
+static int fd_ioctl(struct block_device *bdev, blk_mode_t mode,
 			     unsigned int cmd, unsigned long param)
 {
 	int ret;
···
 #define FDGETFDCSTAT32 _IOR(2, 0x15, struct compat_floppy_fdc_state)
 #define FDWERRORGET32  _IOR(2, 0x17, struct compat_floppy_write_errors)
 
-static int compat_set_geometry(struct block_device *bdev, fmode_t mode, unsigned int cmd,
-		    struct compat_floppy_struct __user *arg)
+static int compat_set_geometry(struct block_device *bdev, blk_mode_t mode,
+		unsigned int cmd, struct compat_floppy_struct __user *arg)
 {
 	struct floppy_struct v;
 	int drive, type;
···
 	BUILD_BUG_ON(offsetof(struct floppy_struct, name) !=
 		     offsetof(struct compat_floppy_struct, name));
 
-	if (!(mode & (FMODE_WRITE | FMODE_WRITE_IOCTL)))
+	if (!(mode & (BLK_OPEN_WRITE | BLK_OPEN_WRITE_IOCTL)))
 		return -EPERM;
 
 	memset(&v, 0, sizeof(struct floppy_struct));
···
 	return 0;
 }
 
-static int fd_compat_ioctl(struct block_device *bdev, fmode_t mode, unsigned int cmd,
-		    unsigned long param)
+static int fd_compat_ioctl(struct block_device *bdev, blk_mode_t mode,
+		unsigned int cmd, unsigned long param)
 {
 	int drive = (long)bdev->bd_disk->private_data;
 	switch (cmd) {
···
  * /dev/PS0 etc), and disallows simultaneous access to the same
  * drive with different device numbers.
  */
-static int floppy_open(struct gendisk *disk, fmode_t mode)
+static int floppy_open(struct gendisk *disk, blk_mode_t mode)
 {
 	int drive = (long)disk->private_data;
 	int old_dev, new_dev;
···
 
 	if (fdc_state[FDC(drive)].rawcmd == 1)
 		fdc_state[FDC(drive)].rawcmd = 2;
-
-	if (!(mode & FMODE_NDELAY)) {
-		if (mode & (FMODE_READ|FMODE_WRITE)) {
+	if (!(mode & BLK_OPEN_NDELAY)) {
+		if (mode & (BLK_OPEN_READ | BLK_OPEN_WRITE)) {
 			drive_state[drive].last_checked = 0;
 			clear_bit(FD_OPEN_SHOULD_FAIL_BIT,
 				  &drive_state[drive].flags);
···
 				goto out;
 		}
 		res = -EROFS;
-		if ((mode & FMODE_WRITE) &&
+		if ((mode & BLK_OPEN_WRITE) &&
 		    !test_bit(FD_DISK_WRITABLE_BIT, &drive_state[drive].flags))
 			goto out;
 	}

drivers/block/loop.c

···
 	return 0;
 }
 
-static int loop_configure(struct loop_device *lo, fmode_t mode,
+static int loop_configure(struct loop_device *lo, blk_mode_t mode,
 			  struct block_device *bdev,
 			  const struct loop_config *config)
 {
···
 	 * If we don't hold exclusive handle for the device, upgrade to it
 	 * here to avoid changing device under exclusive owner.
 	 */
-	if (!(mode & FMODE_EXCL)) {
+	if (!(mode & BLK_OPEN_EXCL)) {
 		error = bd_prepare_to_claim(bdev, loop_configure, NULL);
 		if (error)
 			goto out_putf;
···
 	if (error)
 		goto out_unlock;
 
-	if (!(file->f_mode & FMODE_WRITE) || !(mode & FMODE_WRITE) ||
+	if (!(file->f_mode & FMODE_WRITE) || !(mode & BLK_OPEN_WRITE) ||
 	    !file->f_op->write_iter)
 		lo->lo_flags |= LO_FLAGS_READ_ONLY;
 
···
 	if (partscan)
 		loop_reread_partitions(lo);
 
-	if (!(mode & FMODE_EXCL))
+	if (!(mode & BLK_OPEN_EXCL))
 		bd_abort_claiming(bdev, loop_configure);
 
 	return 0;
···
 out_unlock:
 	loop_global_unlock(lo, is_loop);
 out_bdev:
-	if (!(mode & FMODE_EXCL))
+	if (!(mode & BLK_OPEN_EXCL))
 		bd_abort_claiming(bdev, loop_configure);
 out_putf:
 	fput(file);
···
 	return err;
 }
 
-static int lo_ioctl(struct block_device *bdev, fmode_t mode,
+static int lo_ioctl(struct block_device *bdev, blk_mode_t mode,
 	unsigned int cmd, unsigned long arg)
 {
 	struct loop_device *lo = bdev->bd_disk->private_data;
···
 		return loop_clr_fd(lo);
 	case LOOP_SET_STATUS:
 		err = -EPERM;
-		if ((mode & FMODE_WRITE) || capable(CAP_SYS_ADMIN)) {
+		if ((mode & BLK_OPEN_WRITE) || capable(CAP_SYS_ADMIN))
 			err = loop_set_status_old(lo, argp);
-		}
 		break;
 	case LOOP_GET_STATUS:
 		return loop_get_status_old(lo, argp);
 	case LOOP_SET_STATUS64:
 		err = -EPERM;
-		if ((mode & FMODE_WRITE) || capable(CAP_SYS_ADMIN)) {
+		if ((mode & BLK_OPEN_WRITE) || capable(CAP_SYS_ADMIN))
 			err = loop_set_status64(lo, argp);
-		}
 		break;
 	case LOOP_GET_STATUS64:
 		return loop_get_status64(lo, argp);
 	case LOOP_SET_CAPACITY:
 	case LOOP_SET_DIRECT_IO:
 	case LOOP_SET_BLOCK_SIZE:
-		if (!(mode & FMODE_WRITE) && !capable(CAP_SYS_ADMIN))
+		if (!(mode & BLK_OPEN_WRITE) && !capable(CAP_SYS_ADMIN))
 			return -EPERM;
 		fallthrough;
 	default:
···
 	return err;
 }
 
-static int lo_compat_ioctl(struct block_device *bdev, fmode_t mode,
+static int lo_compat_ioctl(struct block_device *bdev, blk_mode_t mode,
 			   unsigned int cmd, unsigned long arg)
 {
 	struct loop_device *lo = bdev->bd_disk->private_data;

drivers/block/mtip32xx/mtip32xx.c

···
  *                 structure pointer.
  */
 static int mtip_block_ioctl(struct block_device *dev,
-			    fmode_t mode,
+			    blk_mode_t mode,
 			    unsigned cmd,
 			    unsigned long arg)
 {
···
  *                 structure pointer.
  */
 static int mtip_block_compat_ioctl(struct block_device *dev,
-			    fmode_t mode,
+			    blk_mode_t mode,
 			    unsigned cmd,
 			    unsigned long arg)
 {

drivers/block/nbd.c

···
 	return -ENOTTY;
 }
 
-static int nbd_ioctl(struct block_device *bdev, fmode_t mode,
+static int nbd_ioctl(struct block_device *bdev, blk_mode_t mode,
 		     unsigned int cmd, unsigned long arg)
 {
 	struct nbd_device *nbd = bdev->bd_disk->private_data;
···
 	return config;
 }
 
-static int nbd_open(struct gendisk *disk, fmode_t mode)
+static int nbd_open(struct gendisk *disk, blk_mode_t mode)
 {
 	struct nbd_device *nbd;
 	int ret = 0;

drivers/block/pktcdvd.c

···
 /*
  * called at open time.
  */
-static int pkt_open_dev(struct pktcdvd_device *pd, fmode_t write)
+static int pkt_open_dev(struct pktcdvd_device *pd, bool write)
 {
 	struct device *ddev = disk_to_dev(pd->disk);
 	int ret;
···
 	 * to read/write from/to it. It is already opened in O_NONBLOCK mode
 	 * so open should not fail.
 	 */
-	bdev = blkdev_get_by_dev(pd->bdev->bd_dev, FMODE_READ, pd, NULL);
+	bdev = blkdev_get_by_dev(pd->bdev->bd_dev, BLK_OPEN_READ, pd, NULL);
 	if (IS_ERR(bdev)) {
 		ret = PTR_ERR(bdev);
 		goto out;
···
 	return pkt_devs[dev_minor];
 }
 
-static int pkt_open(struct gendisk *disk, fmode_t mode)
+static int pkt_open(struct gendisk *disk, blk_mode_t mode)
 {
 	struct pktcdvd_device *pd = NULL;
 	int ret;
···
 
 	pd->refcnt++;
 	if (pd->refcnt > 1) {
-		if ((mode & FMODE_WRITE) &&
+		if ((mode & BLK_OPEN_WRITE) &&
 		    !test_bit(PACKET_WRITABLE, &pd->flags)) {
 			ret = -EBUSY;
 			goto out_dec;
 		}
 	} else {
-		ret = pkt_open_dev(pd, mode & FMODE_WRITE);
+		ret = pkt_open_dev(pd, mode & BLK_OPEN_WRITE);
 		if (ret)
 			goto out_dec;
 		/*
···
 		 */
 		set_blocksize(disk->part0, CD_FRAMESIZE);
 	}
-
 	mutex_unlock(&ctl_mutex);
 	mutex_unlock(&pktcdvd_mutex);
 	return 0;
···
 		}
 	}
 
-	bdev = blkdev_get_by_dev(dev, FMODE_READ | FMODE_NDELAY, NULL, NULL);
+	bdev = blkdev_get_by_dev(dev, BLK_OPEN_READ | BLK_OPEN_NDELAY, NULL,
+				 NULL);
 	if (IS_ERR(bdev))
 		return PTR_ERR(bdev);
 	sdev = scsi_device_from_queue(bdev->bd_disk->queue);
···
 	return -ENOMEM;
 }
 
-static int pkt_ioctl(struct block_device *bdev, fmode_t mode, unsigned int cmd, unsigned long arg)
+static int pkt_ioctl(struct block_device *bdev, blk_mode_t mode,
+		unsigned int cmd, unsigned long arg)
 {
 	struct pktcdvd_device *pd = bdev->bd_disk->private_data;
 	struct device *ddev = disk_to_dev(pd->disk);

drivers/block/rbd.c

···
 	return true;
 }
 
-static int rbd_open(struct gendisk *disk, fmode_t mode)
+static int rbd_open(struct gendisk *disk, blk_mode_t mode)
 {
 	struct rbd_device *rbd_dev = disk->private_data;
 	bool removing = false;

drivers/block/rnbd/rnbd-clt.c

···
 	return sess;
 }
 
-static int rnbd_client_open(struct gendisk *disk, fmode_t mode)
+static int rnbd_client_open(struct gendisk *disk, blk_mode_t mode)
 {
 	struct rnbd_clt_dev *dev = disk->private_data;
 
-	if (get_disk_ro(dev->gd) && (mode & FMODE_WRITE))
+	if (get_disk_ro(dev->gd) && (mode & BLK_OPEN_WRITE))
 		return -EPERM;
 
 	if (dev->dev_state == DEV_STATE_UNMAPPED ||

drivers/block/rnbd/rnbd-srv.c

···
 	struct rnbd_srv_sess_dev *srv_sess_dev;
 	const struct rnbd_msg_open *open_msg = msg;
 	struct block_device *bdev;
-	fmode_t open_flags = FMODE_READ;
+	blk_mode_t open_flags = BLK_OPEN_READ;
 	char *full_path;
 	struct rnbd_msg_open_rsp *rsp = data;
 
 	trace_process_msg_open(srv_sess, open_msg);
 
 	if (open_msg->access_mode != RNBD_ACCESS_RO)
-		open_flags |= FMODE_WRITE;
+		open_flags |= BLK_OPEN_WRITE;
 
 	mutex_lock(&srv_sess->lock);
 

drivers/block/sunvdc.c

···
  * when vdisk_mtype is VD_MEDIA_TYPE_CD or VD_MEDIA_TYPE_DVD.
  * Needed to be able to install inside an ldom from an iso image.
  */
-static int vdc_ioctl(struct block_device *bdev, fmode_t mode,
+static int vdc_ioctl(struct block_device *bdev, blk_mode_t mode,
 		     unsigned command, unsigned long argument)
 {
 	struct vdc_port *port = bdev->bd_disk->private_data;

drivers/block/swim.c

···
 	}
 }
 
-static int floppy_open(struct gendisk *disk, fmode_t mode)
+static int floppy_open(struct gendisk *disk, blk_mode_t mode)
 {
 	struct floppy_state *fs = disk->private_data;
 	struct swim __iomem *base = fs->swd->base;
 	int err;
 
-	if (fs->ref_count == -1 || (fs->ref_count && mode & FMODE_EXCL))
+	if (fs->ref_count == -1 || (fs->ref_count && mode & BLK_OPEN_EXCL))
 		return -EBUSY;
-
-	if (mode & FMODE_EXCL)
+	if (mode & BLK_OPEN_EXCL)
 		fs->ref_count = -1;
 	else
 		fs->ref_count++;
-
 	swim_write(base, setup, S_IBM_DRIVE  | S_FCLK_DIV2);
 	udelay(10);
 	swim_drive(base, fs->location);
···
 
 	set_capacity(fs->disk, fs->total_secs);
 
-	if (mode & FMODE_NDELAY)
+	if (mode & BLK_OPEN_NDELAY)
 		return 0;
 
-	if (mode & (FMODE_READ|FMODE_WRITE)) {
+	if (mode & (BLK_OPEN_READ | BLK_OPEN_WRITE)) {
 		if (disk_check_media_change(disk) && fs->disk_in)
 			fs->ejected = 0;
 		if ((mode & FMODE_WRITE) && fs->write_protected) {
···
 	return err;
 }
 
-static int floppy_unlocked_open(struct gendisk *disk, fmode_t mode)
+static int floppy_unlocked_open(struct gendisk *disk, blk_mode_t mode)
 {
 	int ret;
 
···
 	mutex_unlock(&swim_mutex);
 }
 
-static int floppy_ioctl(struct block_device *bdev, fmode_t mode,
+static int floppy_ioctl(struct block_device *bdev, blk_mode_t mode,
 			unsigned int cmd, unsigned long param)
 {
 	struct floppy_state *fs = bdev->bd_disk->private_data;

drivers/block/swim3.c

···
 		      int interruptible);
 static void release_drive(struct floppy_state *fs);
 static int fd_eject(struct floppy_state *fs);
-static int floppy_ioctl(struct block_device *bdev, fmode_t mode,
+static int floppy_ioctl(struct block_device *bdev, blk_mode_t mode,
 			unsigned int cmd, unsigned long param);
-static int floppy_open(struct gendisk *disk, fmode_t mode);
+static int floppy_open(struct gendisk *disk, blk_mode_t mode);
 static unsigned int floppy_check_events(struct gendisk *disk,
 					unsigned int clearing);
 static int floppy_revalidate(struct gendisk *disk);
···
 static struct floppy_struct floppy_type =
 	{ 2880,18,2,80,0,0x1B,0x00,0xCF,0x6C,NULL };	/*  7 1.44MB 3.5"   */
 
-static int floppy_locked_ioctl(struct block_device *bdev, fmode_t mode,
+static int floppy_locked_ioctl(struct block_device *bdev,
 			unsigned int cmd, unsigned long param)
 {
 	struct floppy_state *fs = bdev->bd_disk->private_data;
···
 	return -ENOTTY;
 }
 
-static int floppy_ioctl(struct block_device *bdev, fmode_t mode,
+static int floppy_ioctl(struct block_device *bdev, blk_mode_t mode,
 				 unsigned int cmd, unsigned long param)
 {
 	int ret;
···
 	return ret;
 }
 
-static int floppy_open(struct gendisk *disk, fmode_t mode)
+static int floppy_open(struct gendisk *disk, blk_mode_t mode)
 {
 	struct floppy_state *fs = disk->private_data;
 	struct swim3 __iomem *sw = fs->swim3;
···
 		swim3_action(fs, SETMFM);
 		swim3_select(fs, RELAX);
 
-	} else if (fs->ref_count == -1 || mode & FMODE_EXCL)
+	} else if (fs->ref_count == -1 || mode & BLK_OPEN_EXCL)
 		return -EBUSY;
 
-	if (err == 0 && (mode & FMODE_NDELAY) == 0
-	    && (mode & (FMODE_READ|FMODE_WRITE))) {
+	if (err == 0 && !(mode & BLK_OPEN_NDELAY) &&
+	    (mode & (BLK_OPEN_READ | BLK_OPEN_WRITE))) {
 		if (disk_check_media_change(disk))
 			floppy_revalidate(disk);
 		if (fs->ejected)
 			err = -ENXIO;
 	}
 
-	if (err == 0 && (mode & FMODE_WRITE)) {
+	if (err == 0 && (mode & BLK_OPEN_WRITE)) {
 		if (fs->write_prot < 0)
 			fs->write_prot = swim3_readbit(fs, WRITE_PROT);
 		if (fs->write_prot)
···
 		return err;
 	}
 
-	if (mode & FMODE_EXCL)
+	if (mode & BLK_OPEN_EXCL)
 		fs->ref_count = -1;
 	else
 		++fs->ref_count;
···
 	return 0;
 }
 
-static int floppy_unlocked_open(struct block_device *bdev, fmode_t mode)
+static int floppy_unlocked_open(struct gendisk *disk, blk_mode_t mode)
 {
 	int ret;
 
 	mutex_lock(&swim3_mutex);
-	ret = floppy_open(bdev, mode);
+	ret = floppy_open(disk, mode);
 	mutex_unlock(&swim3_mutex);
 
 	return ret;

drivers/block/ublk_drv.c

···
 	*owner_gid = from_kgid(&init_user_ns, gid);
 }
 
-static int ublk_open(struct gendisk *disk, fmode_t mode)
+static int ublk_open(struct gendisk *disk, blk_mode_t mode)
 {
 	struct ublk_device *ub = disk->private_data;
 

drivers/block/xen-blkback/xenbus.c

···
 	vbd->pdevice  = MKDEV(major, minor);
 
 	bdev = blkdev_get_by_dev(vbd->pdevice, vbd->readonly ?
-				 FMODE_READ : FMODE_WRITE, NULL, NULL);
+				 BLK_OPEN_READ : BLK_OPEN_WRITE, NULL, NULL);
 
 	if (IS_ERR(bdev)) {
 		pr_warn("xen_vbd_create: device %08x could not be opened\n",

drivers/block/xen-blkfront.c

···
 	return 0;
 }
 
-static int blkif_ioctl(struct block_device *bdev, fmode_t mode,
+static int blkif_ioctl(struct block_device *bdev, blk_mode_t mode,
 		       unsigned command, unsigned long argument)
 {
 	struct blkfront_info *info = bdev->bd_disk->private_data;

drivers/block/z2ram.c

···
 	return;
 }
 
-static int z2_open(struct gendisk *disk, fmode_t mode)
+static int z2_open(struct gendisk *disk, blk_mode_t mode)
 {
 	int device = disk->first_minor;
 	int max_z2_map = (Z2RAM_SIZE / Z2RAM_CHUNKSIZE) * sizeof(z2ram_map[0]);

drivers/block/zram/zram_drv.c

···
 		goto out;
 	}
 
-	bdev = blkdev_get_by_dev(inode->i_rdev, FMODE_READ | FMODE_WRITE, zram,
-				 NULL);
+	bdev = blkdev_get_by_dev(inode->i_rdev, BLK_OPEN_READ | BLK_OPEN_WRITE,
+				 zram, NULL);
 	if (IS_ERR(bdev)) {
 		err = PTR_ERR(bdev);
 		bdev = NULL;
···
 	return len;
 }
 
-static int zram_open(struct gendisk *disk, fmode_t mode)
+static int zram_open(struct gendisk *disk, blk_mode_t mode)
 {
 	struct zram *zram = disk->private_data;
 

drivers/cdrom/cdrom.c

···
  * is in their own interest: device control becomes a lot easier
  * this way.
  */
-int cdrom_open(struct cdrom_device_info *cdi, fmode_t mode)
+int cdrom_open(struct cdrom_device_info *cdi, blk_mode_t mode)
 {
 	int ret;
 
···
 	/* if this was a O_NONBLOCK open and we should honor the flags,
 	 * do a quick open without drive/disc integrity checks. */
 	cdi->use_count++;
-	if ((mode & FMODE_NDELAY) && (cdi->options & CDO_USE_FFLAGS)) {
+	if ((mode & BLK_OPEN_NDELAY) && (cdi->options & CDO_USE_FFLAGS)) {
 		ret = cdi->ops->open(cdi, 1);
 	} else {
 		ret = open_for_data(cdi);
···
 			goto err;
 		if (CDROM_CAN(CDC_GENERIC_PACKET))
 			cdrom_mmc3_profile(cdi);
-		if (mode & FMODE_WRITE) {
+		if (mode & BLK_OPEN_WRITE) {
 			ret = -EROFS;
 			if (cdrom_open_write(cdi))
 				goto err_release;

drivers/cdrom/gdrom.c

···
 				  CDC_RESET | CDC_DRIVE_STATUS | CDC_CD_R,
 };
 
-static int gdrom_bdops_open(struct gendisk *disk, fmode_t mode)
+static int gdrom_bdops_open(struct gendisk *disk, blk_mode_t mode)
 {
 	int ret;
 
···
 	return cdrom_check_events(gd.cd_info, clearing);
 }
 
-static int gdrom_bdops_ioctl(struct block_device *bdev, fmode_t mode,
+static int gdrom_bdops_ioctl(struct block_device *bdev, blk_mode_t mode,
 	unsigned cmd, unsigned long arg)
 {
 	int ret;

drivers/md/bcache/bcache.h

···
 
 	int (*cache_miss)(struct btree *b, struct search *s,
 			  struct bio *bio, unsigned int sectors);
-	int (*ioctl)(struct bcache_device *d, fmode_t mode,
+	int (*ioctl)(struct bcache_device *d, blk_mode_t mode,
 		     unsigned int cmd, unsigned long arg);
 };
 

drivers/md/bcache/request.c

···
 		detached_dev_do_request(d, bio, orig_bdev, start_time);
 }
 
-static int cached_dev_ioctl(struct bcache_device *d, fmode_t mode,
+static int cached_dev_ioctl(struct bcache_device *d, blk_mode_t mode,
 			    unsigned int cmd, unsigned long arg)
 {
 	struct cached_dev *dc = container_of(d, struct cached_dev, disk);
···
 	continue_at(cl, search_free, NULL);
 }
 
-static int flash_dev_ioctl(struct bcache_device *d, fmode_t mode,
+static int flash_dev_ioctl(struct bcache_device *d, blk_mode_t mode,
 			   unsigned int cmd, unsigned long arg)
 {
 	return -ENOTTY;

drivers/md/bcache/super.c

···
 
 /* Bcache device */
 
-static int open_dev(struct gendisk *disk, fmode_t mode)
+static int open_dev(struct gendisk *disk, blk_mode_t mode)
 {
 	struct bcache_device *d = disk->private_data;
 
···
 	closure_put(&d->cl);
 }
 
-static int ioctl_dev(struct block_device *b, fmode_t mode,
+static int ioctl_dev(struct block_device *b, blk_mode_t mode,
 		     unsigned int cmd, unsigned long arg)
 {
 	struct bcache_device *d = b->bd_disk->private_data;
···
 
 	ret = -EINVAL;
 	err = "failed to open device";
-	bdev = blkdev_get_by_path(strim(path), FMODE_READ | FMODE_WRITE,
+	bdev = blkdev_get_by_path(strim(path), BLK_OPEN_READ | BLK_OPEN_WRITE,
 				  bcache_kobj, NULL);
 	if (IS_ERR(bdev)) {
 		if (bdev == ERR_PTR(-EBUSY)) {

drivers/md/dm-cache-target.c

···
 	if (!at_least_one_arg(as, error))
 		return -EINVAL;
 
-	r = dm_get_device(ca->ti, dm_shift_arg(as), FMODE_READ | FMODE_WRITE,
-			  &ca->metadata_dev);
+	r = dm_get_device(ca->ti, dm_shift_arg(as),
+			  BLK_OPEN_READ | BLK_OPEN_WRITE, &ca->metadata_dev);
 	if (r) {
 		*error = "Error opening metadata device";
 		return r;
···
 	if (!at_least_one_arg(as, error))
 		return -EINVAL;
 
-	r = dm_get_device(ca->ti, dm_shift_arg(as), FMODE_READ | FMODE_WRITE,
-			  &ca->cache_dev);
+	r = dm_get_device(ca->ti, dm_shift_arg(as),
+			  BLK_OPEN_READ | BLK_OPEN_WRITE, &ca->cache_dev);
 	if (r) {
 		*error = "Error opening cache device";
 		return r;
···
 	if (!at_least_one_arg(as, error))
 		return -EINVAL;
 
-	r = dm_get_device(ca->ti, dm_shift_arg(as), FMODE_READ | FMODE_WRITE,
-			  &ca->origin_dev);
+	r = dm_get_device(ca->ti, dm_shift_arg(as),
+			  BLK_OPEN_READ | BLK_OPEN_WRITE, &ca->origin_dev);
 	if (r) {
 		*error = "Error opening origin device";
 		return r;

drivers/md/dm-clone-target.c

···
 	int r;
 	sector_t metadata_dev_size;
 
-	r = dm_get_device(clone->ti, dm_shift_arg(as), FMODE_READ | FMODE_WRITE,
-			  &clone->metadata_dev);
+	r = dm_get_device(clone->ti, dm_shift_arg(as),
+			  BLK_OPEN_READ | BLK_OPEN_WRITE, &clone->metadata_dev);
 	if (r) {
 		*error = "Error opening metadata device";
 		return r;
···
 	int r;
 	sector_t dest_dev_size;
 
-	r = dm_get_device(clone->ti, dm_shift_arg(as), FMODE_READ | FMODE_WRITE,
-			  &clone->dest_dev);
+	r = dm_get_device(clone->ti, dm_shift_arg(as),
+			  BLK_OPEN_READ | BLK_OPEN_WRITE, &clone->dest_dev);
 	if (r) {
 		*error = "Error opening destination device";
 		return r;
···
 	int r;
 	sector_t source_dev_size;
 
-	r = dm_get_device(clone->ti, dm_shift_arg(as), FMODE_READ,
+	r = dm_get_device(clone->ti, dm_shift_arg(as), BLK_OPEN_READ,
 			  &clone->source_dev);
 	if (r) {
 		*error = "Error opening source device";

drivers/md/dm-core.h

···
 	unsigned integrity_added:1;
 
 	/*
-	 * Indicates the rw permissions for the new logical
-	 * device.  This should be a combination of FMODE_READ
-	 * and FMODE_WRITE.
+	 * Indicates the rw permissions for the new logical device.  This
+	 * should be a combination of BLK_OPEN_READ and BLK_OPEN_WRITE.
 	 */
-	fmode_t mode;
+	blk_mode_t mode;
 
 	/* a list of devices used by this table */
 	struct list_head devices;

drivers/md/dm-era-target.c

···
 
 	era->ti = ti;
 
-	r = dm_get_device(ti, argv[0], FMODE_READ | FMODE_WRITE, &era->metadata_dev);
+	r = dm_get_device(ti, argv[0], BLK_OPEN_READ | BLK_OPEN_WRITE,
+			  &era->metadata_dev);
 	if (r) {
 		ti->error = "Error opening metadata device";
 		era_destroy(era);
 		return -EINVAL;
 	}
 
-	r = dm_get_device(ti, argv[1], FMODE_READ | FMODE_WRITE, &era->origin_dev);
+	r = dm_get_device(ti, argv[1], BLK_OPEN_READ | BLK_OPEN_WRITE,
+			  &era->origin_dev);
 	if (r) {
 		ti->error = "Error opening data device";
 		era_destroy(era);

drivers/md/dm-ioctl.c

···
 
 		table = dm_get_inactive_table(md, &srcu_idx);
 		if (table) {
-			if (!(dm_table_get_mode(table) & FMODE_WRITE))
+			if (!(dm_table_get_mode(table) & BLK_OPEN_WRITE))
 				param->flags |= DM_READONLY_FLAG;
 			param->target_count = table->num_targets;
 		}
···
 		if (old_size && new_size && old_size != new_size)
 			need_resize_uevent = true;
 
-		if (dm_table_get_mode(new_map) & FMODE_WRITE)
+		if (dm_table_get_mode(new_map) & BLK_OPEN_WRITE)
 			set_disk_ro(dm_disk(md), 0);
 		else
 			set_disk_ro(dm_disk(md), 1);
···
 	return 0;
 }
 
-static inline fmode_t get_mode(struct dm_ioctl *param)
+static inline blk_mode_t get_mode(struct dm_ioctl *param)
 {
-	fmode_t mode = FMODE_READ | FMODE_WRITE;
+	blk_mode_t mode = BLK_OPEN_READ | BLK_OPEN_WRITE;
 
 	if (param->flags & DM_READONLY_FLAG)
-		mode = FMODE_READ;
+		mode = BLK_OPEN_READ;
 
 	return mode;
 }

drivers/md/dm-snap.c

···
 	int r = -EINVAL;
 	char *origin_path, *cow_path;
 	unsigned int args_used, num_flush_bios = 1;
-	fmode_t origin_mode = FMODE_READ;
+	blk_mode_t origin_mode = BLK_OPEN_READ;
 
 	if (argc < 4) {
 		ti->error = "requires 4 or more arguments";
···
 
 	if (dm_target_is_snapshot_merge(ti)) {
 		num_flush_bios = 2;
-		origin_mode = FMODE_WRITE;
+		origin_mode = BLK_OPEN_WRITE;
 	}
 
 	s = kzalloc(sizeof(*s), GFP_KERNEL);

drivers/md/dm-table.c

···
 	return 0;
 }
 
-int dm_table_create(struct dm_table **result, fmode_t mode,
+int dm_table_create(struct dm_table **result, blk_mode_t mode,
 		    unsigned int num_targets, struct mapped_device *md)
 {
 	struct dm_table *t = kzalloc(sizeof(*t), GFP_KERNEL);
···
  * device and not to touch the existing bdev field in case
  * it is accessed concurrently.
  */
-static int upgrade_mode(struct dm_dev_internal *dd, fmode_t new_mode,
+static int upgrade_mode(struct dm_dev_internal *dd, blk_mode_t new_mode,
 			struct mapped_device *md)
 {
 	int r;
···
  * Note: the __ref annotation is because this function can call the __init
  * marked early_lookup_bdev when called during early boot code from dm-init.c.
  */
-int __ref dm_get_device(struct dm_target *ti, const char *path, fmode_t mode,
+int __ref dm_get_device(struct dm_target *ti, const char *path, blk_mode_t mode,
 		  struct dm_dev **result)
 {
 	int r;
···
 		t->singleton = true;
 	}
 
-	if (dm_target_always_writeable(ti->type) && !(t->mode & FMODE_WRITE)) {
+	if (dm_target_always_writeable(ti->type) &&
+	    !(t->mode & BLK_OPEN_WRITE)) {
 		ti->error = "target type may not be included in a read-only table";
 		goto bad;
 	}
···
 	return &t->devices;
 }
 
-fmode_t dm_table_get_mode(struct dm_table *t)
+blk_mode_t dm_table_get_mode(struct dm_table *t)
 {
 	return t->mode;
 }

drivers/md/dm-thin.c

···
 	unsigned long block_size;
 	dm_block_t low_water_blocks;
 	struct dm_dev *metadata_dev;
-	fmode_t metadata_mode;
+	blk_mode_t metadata_mode;
 
 	/*
 	 * FIXME Remove validation from scope of lock.
···
 	if (r)
 		goto out_unlock;
 
-	metadata_mode = FMODE_READ | ((pf.mode == PM_READ_ONLY) ? 0 : FMODE_WRITE);
+	metadata_mode = BLK_OPEN_READ |
+		((pf.mode == PM_READ_ONLY) ? 0 : BLK_OPEN_WRITE);
 	r = dm_get_device(ti, argv[0], metadata_mode, &metadata_dev);
 	if (r) {
 		ti->error = "Error opening metadata block device";
···
 	}
 	warn_if_metadata_device_too_big(metadata_dev->bdev);
 
-	r = dm_get_device(ti, argv[1], FMODE_READ | FMODE_WRITE, &data_dev);
+	r = dm_get_device(ti, argv[1], BLK_OPEN_READ | BLK_OPEN_WRITE, &data_dev);
 	if (r) {
 		ti->error = "Error getting data device";
 		goto out_metadata;
···
 			goto bad_origin_dev;
 		}
 
-		r = dm_get_device(ti, argv[2], FMODE_READ, &origin_dev);
+		r = dm_get_device(ti, argv[2], BLK_OPEN_READ, &origin_dev);
 		if (r) {
 			ti->error = "Error opening origin device";
 			goto bad_origin_dev;

drivers/md/dm-verity-fec.c

···
 	(*argc)--;
 
 	if (!strcasecmp(arg_name, DM_VERITY_OPT_FEC_DEV)) {
-		r = dm_get_device(ti, arg_value, FMODE_READ, &v->fec->dev);
+		r = dm_get_device(ti, arg_value, BLK_OPEN_READ, &v->fec->dev);
 		if (r) {
 			ti->error = "FEC device lookup failed";
 			return r;

drivers/md/dm-verity-target.c

···
 	if (r)
 		goto bad;
 
-	if ((dm_table_get_mode(ti->table) & ~FMODE_READ)) {
+	if ((dm_table_get_mode(ti->table) & ~BLK_OPEN_READ)) {
 		ti->error = "Device must be readonly";
 		r = -EINVAL;
 		goto bad;
···
 	}
 	v->version = num;
 
-	r = dm_get_device(ti, argv[1], FMODE_READ, &v->data_dev);
+	r = dm_get_device(ti, argv[1], BLK_OPEN_READ, &v->data_dev);
 	if (r) {
 		ti->error = "Data device lookup failed";
 		goto bad;
 	}
 
-	r = dm_get_device(ti, argv[2], FMODE_READ, &v->hash_dev);
+	r = dm_get_device(ti, argv[2], BLK_OPEN_READ, &v->hash_dev);
 	if (r) {
 		ti->error = "Hash device lookup failed";
 		goto bad;

drivers/md/dm.c

···
 	return test_bit(DMF_DELETING, &md->flags);
 }
 
-static int dm_blk_open(struct gendisk *disk, fmode_t mode)
+static int dm_blk_open(struct gendisk *disk, blk_mode_t mode)
 {
 	struct mapped_device *md;
 
···
 	dm_put_live_table(md, srcu_idx);
 }
 
-static int dm_blk_ioctl(struct block_device *bdev, fmode_t mode,
+static int dm_blk_ioctl(struct block_device *bdev, blk_mode_t mode,
 			unsigned int cmd, unsigned long arg)
 {
 	struct mapped_device *md = bdev->bd_disk->private_data;
···
  * Open a table device so we can use it as a map destination.
  */
 static struct table_device *open_table_device(struct mapped_device *md,
-		dev_t dev, fmode_t mode)
+		dev_t dev, blk_mode_t mode)
 {
 	struct table_device *td;
 	struct block_device *bdev;
···
 }
 
 static struct table_device *find_table_device(struct list_head *l, dev_t dev,
-					      fmode_t mode)
+					      blk_mode_t mode)
 {
 	struct table_device *td;
 
···
 	return NULL;
 }
 
-int dm_get_table_device(struct mapped_device *md, dev_t dev, fmode_t mode,
+int dm_get_table_device(struct mapped_device *md, dev_t dev, blk_mode_t mode,
 			struct dm_dev **result)
 {
 	struct table_device *td;

drivers/md/dm.h

···
 int dm_lock_for_deletion(struct mapped_device *md, bool mark_deferred, bool only_deferred);
 int dm_cancel_deferred_remove(struct mapped_device *md);
 int dm_request_based(struct mapped_device *md);
-int dm_get_table_device(struct mapped_device *md, dev_t dev, fmode_t mode,
+int dm_get_table_device(struct mapped_device *md, dev_t dev, blk_mode_t mode,
 			struct dm_dev **result);
 void dm_put_table_device(struct mapped_device *md, struct dm_dev *d);
 

drivers/md/md.c

···
 	if (err)
 		goto out_clear_rdev;
 
-	rdev->bdev = blkdev_get_by_dev(newdev, FMODE_READ | FMODE_WRITE,
+	rdev->bdev = blkdev_get_by_dev(newdev, BLK_OPEN_READ | BLK_OPEN_WRITE,
 			super_format == -2 ? &claim_rdev : rdev, NULL);
 	if (IS_ERR(rdev->bdev)) {
 		pr_warn("md: could not open device unknown-block(%u,%u).\n",
···
 	return err;
 }
 
-static int md_ioctl(struct block_device *bdev, fmode_t mode,
+static int md_ioctl(struct block_device *bdev, blk_mode_t mode,
 			unsigned int cmd, unsigned long arg)
 {
 	int err = 0;
···
 	return err;
 }
 #ifdef CONFIG_COMPAT
-static int md_compat_ioctl(struct block_device *bdev, fmode_t mode,
+static int md_compat_ioctl(struct block_device *bdev, blk_mode_t mode,
 		    unsigned int cmd, unsigned long arg)
 {
 	switch (cmd) {
···
 	return err;
 }
 
-static int md_open(struct gendisk *disk, fmode_t mode)
+static int md_open(struct gendisk *disk, blk_mode_t mode)
 {
 	struct mddev *mddev;
 	int err;

drivers/mmc/core/block.c

···
 	NULL,
 };
 
-static int mmc_blk_open(struct gendisk *disk, fmode_t mode)
+static int mmc_blk_open(struct gendisk *disk, blk_mode_t mode)
 {
 	struct mmc_blk_data *md = mmc_blk_get(disk);
 	int ret = -ENXIO;
···
 	mutex_lock(&block_mutex);
 	if (md) {
 		ret = 0;
-		if ((mode & FMODE_WRITE) && md->read_only) {
+		if ((mode & BLK_OPEN_WRITE) && md->read_only) {
 			mmc_blk_put(md);
 			ret = -EROFS;
 		}
···
 	return 0;
 }
 
-static int mmc_blk_ioctl(struct block_device *bdev, fmode_t mode,
+static int mmc_blk_ioctl(struct block_device *bdev, blk_mode_t mode,
 	unsigned int cmd, unsigned long arg)
 {
 	struct mmc_blk_data *md;
···
 }
 
 #ifdef CONFIG_COMPAT
-static int mmc_blk_compat_ioctl(struct block_device *bdev, fmode_t mode,
+static int mmc_blk_compat_ioctl(struct block_device *bdev, blk_mode_t mode,
 	unsigned int cmd, unsigned long arg)
 {
 	return mmc_blk_ioctl(bdev, mode, cmd, (unsigned long) compat_ptr(arg));

drivers/mtd/devices/block2mtd.c

···
  * early_lookup_bdev when called from the early boot code.
  */
 static struct block_device __ref *mdtblock_early_get_bdev(const char *devname,
-		fmode_t mode, int timeout, struct block2mtd_dev *dev)
+		blk_mode_t mode, int timeout, struct block2mtd_dev *dev)
 {
 	struct block_device *bdev = ERR_PTR(-ENODEV);
 #ifndef MODULE
···
 static struct block2mtd_dev *add_device(char *devname, int erase_size,
 		char *label, int timeout)
 {
-	const fmode_t mode = FMODE_READ | FMODE_WRITE;
+	const blk_mode_t mode = BLK_OPEN_READ | BLK_OPEN_WRITE;
 	struct block_device *bdev;
 	struct block2mtd_dev *dev;
 	char *name;

drivers/mtd/mtd_blkdevs.c

···
 	return BLK_STS_OK;
 }
 
-static int blktrans_open(struct gendisk *disk, fmode_t mode)
+static int blktrans_open(struct gendisk *disk, blk_mode_t mode)
 {
 	struct mtd_blktrans_dev *dev = disk->private_data;
 	int ret = 0;
···
 	ret = __get_mtd_device(dev->mtd);
 	if (ret)
 		goto error_release;
-	dev->writable = mode & FMODE_WRITE;
+	dev->writable = mode & BLK_OPEN_WRITE;
 
 unlock:
 	dev->open++;

drivers/mtd/ubi/block.c

···
 	return BLK_STS_OK;
 }
 
-static int ubiblock_open(struct gendisk *disk, fmode_t mode)
+static int ubiblock_open(struct gendisk *disk, blk_mode_t mode)
 {
 	struct ubiblock *dev = disk->private_data;
 	int ret;
···
 	 * It's just a paranoid check, as write requests will get rejected
 	 * in any case.
 	 */
-	if (mode & FMODE_WRITE) {
+	if (mode & BLK_OPEN_WRITE) {
 		ret = -EROFS;
 		goto out_unlock;
 	}
-
 	dev->desc = ubi_open_volume(dev->ubi_num, dev->vol_id, UBI_READONLY);
 	if (IS_ERR(dev->desc)) {
 		dev_err(disk_to_dev(dev->gd), "failed to open ubi volume %d_%d",

drivers/nvme/host/core.c

···
 	nvme_put_ns(ns);
 }
 
-static int nvme_open(struct gendisk *disk, fmode_t mode)
+static int nvme_open(struct gendisk *disk, blk_mode_t mode)
 {
 	return nvme_ns_open(disk->private_data);
 }

drivers/nvme/host/ioctl.c

···
 	}
 }
 
-int nvme_ioctl(struct block_device *bdev, fmode_t mode,
+int nvme_ioctl(struct block_device *bdev, blk_mode_t mode,
 		unsigned int cmd, unsigned long arg)
 {
 	struct nvme_ns *ns = bdev->bd_disk->private_data;
-	bool open_for_write = mode & FMODE_WRITE;
+	bool open_for_write = mode & BLK_OPEN_WRITE;
 	void __user *argp = (void __user *)arg;
 	unsigned int flags = 0;
 
···
 	return ret;
 }
 
-int nvme_ns_head_ioctl(struct block_device *bdev, fmode_t mode,
+int nvme_ns_head_ioctl(struct block_device *bdev, blk_mode_t mode,
 		unsigned int cmd, unsigned long arg)
 {
 	struct nvme_ns_head *head = bdev->bd_disk->private_data;
-	bool open_for_write = mode & FMODE_WRITE;
+	bool open_for_write = mode & BLK_OPEN_WRITE;
 	void __user *argp = (void __user *)arg;
 	struct nvme_ns *ns;
 	int srcu_idx, ret = -EWOULDBLOCK;

drivers/nvme/host/multipath.c

···
 	srcu_read_unlock(&head->srcu, srcu_idx);
 }
 
-static int nvme_ns_head_open(struct gendisk *disk, fmode_t mode)
+static int nvme_ns_head_open(struct gendisk *disk, blk_mode_t mode)
 {
 	if (!nvme_tryget_ns_head(disk->private_data))
 		return -ENXIO;

drivers/nvme/host/nvme.h

···
 int nvme_cdev_add(struct cdev *cdev, struct device *cdev_device,
 		const struct file_operations *fops, struct module *owner);
 void nvme_cdev_del(struct cdev *cdev, struct device *cdev_device);
-int nvme_ioctl(struct block_device *bdev, fmode_t mode,
+int nvme_ioctl(struct block_device *bdev, blk_mode_t mode,
 		unsigned int cmd, unsigned long arg);
 long nvme_ns_chr_ioctl(struct file *file, unsigned int cmd, unsigned long arg);
-int nvme_ns_head_ioctl(struct block_device *bdev, fmode_t mode,
+int nvme_ns_head_ioctl(struct block_device *bdev, blk_mode_t mode,
 		unsigned int cmd, unsigned long arg);
 long nvme_ns_head_chr_ioctl(struct file *file, unsigned int cmd,
 		unsigned long arg);

drivers/nvme/target/io-cmd-bdev.c

···
 		return -ENOTBLK;
 
 	ns->bdev = blkdev_get_by_path(ns->device_path,
-			FMODE_READ | FMODE_WRITE, NULL, NULL);
+			BLK_OPEN_READ | BLK_OPEN_WRITE, NULL, NULL);
 	if (IS_ERR(ns->bdev)) {
 		ret = PTR_ERR(ns->bdev);
 		if (ret != -ENOTBLK) {

drivers/s390/block/dasd.c

···
 	.exit_hctx = dasd_exit_hctx,
 };
 
-static int dasd_open(struct gendisk *disk, fmode_t mode)
+static int dasd_open(struct gendisk *disk, blk_mode_t mode)
 {
 	struct dasd_device *base;
 	int rc;
···
 		rc = -ENODEV;
 		goto out;
 	}
-
-	if ((mode & FMODE_WRITE) &&
+	if ((mode & BLK_OPEN_WRITE) &&
 	    (test_bit(DASD_FLAG_DEVICE_RO, &base->flags) ||
 	     (base->features & DASD_FEATURE_READONLY))) {
 		rc = -EROFS;
 		goto out;
 	}
-
 	dasd_put_device(base);
 	return 0;
 

drivers/s390/block/dasd_genhd.c

···
 	struct block_device *bdev;
 	int rc;
 
-	bdev = blkdev_get_by_dev(disk_devt(block->gdp), FMODE_READ, NULL, NULL);
+	bdev = blkdev_get_by_dev(disk_devt(block->gdp), BLK_OPEN_READ, NULL,
+				 NULL);
 	if (IS_ERR(bdev)) {
 		DBF_DEV_EVENT(DBF_ERR, block->base,
 			      "scan partitions error, blkdev_get returned %ld",

drivers/s390/block/dasd_int.h

···
 void dasd_destroy_partitions(struct dasd_block *);
 
 /* externals in dasd_ioctl.c */
-int dasd_ioctl(struct block_device *, fmode_t, unsigned int, unsigned long);
+int dasd_ioctl(struct block_device *bdev, blk_mode_t mode, unsigned int cmd,
+		unsigned long arg);
 int dasd_set_read_only(struct block_device *bdev, bool ro);
 
 /* externals in dasd_proc.c */

drivers/s390/block/dasd_ioctl.c

···
 	return ret;
 }
 
-int dasd_ioctl(struct block_device *bdev, fmode_t mode,
+int dasd_ioctl(struct block_device *bdev, blk_mode_t mode,
 	       unsigned int cmd, unsigned long arg)
 {
 	struct dasd_block *block;

drivers/s390/block/dcssblk.c

···
 #define DCSSBLK_PARM_LEN 400
 #define DCSS_BUS_ID_SIZE 20
 
-static int dcssblk_open(struct gendisk *disk, fmode_t mode);
+static int dcssblk_open(struct gendisk *disk, blk_mode_t mode);
 static void dcssblk_release(struct gendisk *disk);
 static void dcssblk_submit_bio(struct bio *bio);
 static long dcssblk_dax_direct_access(struct dax_device *dax_dev, pgoff_t pgoff,
···
 }
 
 static int
-dcssblk_open(struct gendisk *disk, fmode_t mode)
+dcssblk_open(struct gendisk *disk, blk_mode_t mode)
 {
 	struct dcssblk_dev_info *dev_info = disk->private_data;
 	int rc;

drivers/scsi/sd.c

···
 /**
  *	sd_open - open a scsi disk device
  *	@disk: disk to open
- *	@mode: FMODE_* mask
+ *	@mode: open mode
  *
  *	Returns 0 if successful. Returns a negated errno value in case 
  *	of error.
···
  *
  *	Locking: called with disk->open_mutex held.
  **/
-static int sd_open(struct gendisk *disk, fmode_t mode)
+static int sd_open(struct gendisk *disk, blk_mode_t mode)
 {
 	struct scsi_disk *sdkp = scsi_disk(disk);
 	struct scsi_device *sdev = sdkp->device;
···
 	 * If the drive is empty, just let the open fail.
 	 */
 	retval = -ENOMEDIUM;
-	if (sdev->removable && !sdkp->media_present && !(mode & FMODE_NDELAY))
+	if (sdev->removable && !sdkp->media_present &&
+	    !(mode & BLK_OPEN_NDELAY))
 		goto error_out;
 
 	/*
···
 	 * if the user expects to be able to write to the thing.
 	 */
 	retval = -EROFS;
-	if (sdkp->write_prot && (mode & FMODE_WRITE))
+	if (sdkp->write_prot && (mode & BLK_OPEN_WRITE))
 		goto error_out;
 
 	/*
···
  *	Note: may block (uninterruptible) if error recovery is underway
  *	on this disk.
  *
- *	Locking: called with bdev->bd_disk->open_mutex held.
+ *	Locking: called with disk->open_mutex held.
  **/
 static void sd_release(struct gendisk *disk)
 {
···
 /**
  *	sd_ioctl - process an ioctl
  *	@bdev: target block device
- *	@mode: FMODE_* mask
+ *	@mode: open mode
  *	@cmd: ioctl command number
  *	@arg: this is third argument given to ioctl(2) system call.
  *	Often contains a pointer.
···
  *	Note: most ioctls are forward onto the block subsystem or further
  *	down in the scsi subsystem.
  **/
-static int sd_ioctl(struct block_device *bdev, fmode_t mode,
+static int sd_ioctl(struct block_device *bdev, blk_mode_t mode,
 		    unsigned int cmd, unsigned long arg)
 {
 	struct gendisk *disk = bdev->bd_disk;
···
 	 * access to the device is prohibited.
 	 */
 	error = scsi_ioctl_block_when_processing_errors(sdp, cmd,
-			(mode & FMODE_NDELAY) != 0);
+			(mode & BLK_OPEN_NDELAY));
 	if (error)
 		return error;
 
 	if (is_sed_ioctl(cmd))
 		return sed_ioctl(sdkp->opal_dev, cmd, p);
-	return scsi_ioctl(sdp, mode & FMODE_WRITE, cmd, p);
+	return scsi_ioctl(sdp, mode & BLK_OPEN_WRITE, cmd, p);
 }
 
 static void set_media_not_present(struct scsi_disk *sdkp)

drivers/scsi/sr.c

···
 	get_sectorsize(cd);
 }
 
-static int sr_block_open(struct gendisk *disk, fmode_t mode)
+static int sr_block_open(struct gendisk *disk, blk_mode_t mode)
 {
 	struct scsi_cd *cd = scsi_cd(disk);
 	struct scsi_device *sdev = cd->device;
···
 	scsi_device_put(cd->device);
 }
 
-static int sr_block_ioctl(struct block_device *bdev, fmode_t mode, unsigned cmd,
-			  unsigned long arg)
+static int sr_block_ioctl(struct block_device *bdev, blk_mode_t mode,
+		unsigned cmd, unsigned long arg)
 {
 	struct scsi_cd *cd = scsi_cd(bdev->bd_disk);
 	struct scsi_device *sdev = cd->device;
···
 	mutex_lock(&cd->lock);
 
 	ret = scsi_ioctl_block_when_processing_errors(sdev, cmd,
-			(mode & FMODE_NDELAY) != 0);
+			(mode & BLK_OPEN_NDELAY));
 	if (ret)
 		goto out;
 
···
 		if (ret != -ENOSYS)
 			goto put;
 	}
-	ret = scsi_ioctl(sdev, mode & FMODE_WRITE, cmd, argp);
+	ret = scsi_ioctl(sdev, mode & BLK_OPEN_WRITE, cmd, argp);
 
 put:
 	scsi_autopm_put_device(sdev);

drivers/target/target_core_iblock.c

···
 	struct request_queue *q;
 	struct block_device *bd = NULL;
 	struct blk_integrity *bi;
-	fmode_t mode;
+	blk_mode_t mode = BLK_OPEN_READ;
 	unsigned int max_write_zeroes_sectors;
 	int ret;
 
···
 	pr_debug( "IBLOCK: Claiming struct block_device: %s\n",
 			ib_dev->ibd_udev_path);
 
-	mode = FMODE_READ;
 	if (!ib_dev->ibd_readonly)
-		mode |= FMODE_WRITE;
+		mode |= BLK_OPEN_WRITE;
 	else
 		dev->dev_flags |= DF_READ_ONLY;
 

drivers/target/target_core_pscsi.c

···
 	 * Claim exclusive struct block_device access to struct scsi_device
 	 * for TYPE_DISK and TYPE_ZBC using supplied udev_path
 	 */
-	bd = blkdev_get_by_path(dev->udev_path, FMODE_WRITE | FMODE_READ, pdv,
-				NULL);
+	bd = blkdev_get_by_path(dev->udev_path, BLK_OPEN_WRITE | BLK_OPEN_READ,
+				pdv, NULL);
 	if (IS_ERR(bd)) {
 		pr_err("pSCSI: blkdev_get_by_path() failed\n");
 		scsi_device_put(sd);

fs/btrfs/dev-replace.c

···
 		return -EINVAL;
 	}
 
-	bdev = blkdev_get_by_path(device_path, FMODE_WRITE,
+	bdev = blkdev_get_by_path(device_path, BLK_OPEN_WRITE,
 				  fs_info->bdev_holder, NULL);
 	if (IS_ERR(bdev)) {
 		btrfs_err(fs_info, "target device %s is invalid!", device_path);

fs/btrfs/super.c

···
  * All other options will be parsed on much later in the mount process and
  * only when we need to allocate a new super block.
  */
-static int btrfs_parse_device_options(const char *options, fmode_t flags)
+static int btrfs_parse_device_options(const char *options, blk_mode_t flags)
 {
 	substring_t args[MAX_OPT_ARGS];
 	char *device_name, *opts, *orig, *p;
···
 	struct btrfs_fs_devices *fs_devices = NULL;
 	struct btrfs_fs_info *fs_info = NULL;
 	void *new_sec_opts = NULL;
-	fmode_t mode = sb_open_mode(flags);
+	blk_mode_t mode = sb_open_mode(flags);
 	int error = 0;
 
 	if (data) {
···
 	switch (cmd) {
 	case BTRFS_IOC_SCAN_DEV:
 		mutex_lock(&uuid_mutex);
-		device = btrfs_scan_one_device(vol->name, FMODE_READ);
+		device = btrfs_scan_one_device(vol->name, BLK_OPEN_READ);
 		ret = PTR_ERR_OR_ZERO(device);
 		mutex_unlock(&uuid_mutex);
 		break;
···
 		break;
 	case BTRFS_IOC_DEVICES_READY:
 		mutex_lock(&uuid_mutex);
-		device = btrfs_scan_one_device(vol->name, FMODE_READ);
+		device = btrfs_scan_one_device(vol->name, BLK_OPEN_READ);
 		if (IS_ERR(device)) {
 			mutex_unlock(&uuid_mutex);
 			ret = PTR_ERR(device);

fs/btrfs/volumes.c

···
 
 
 static int
-btrfs_get_bdev_and_sb(const char *device_path, fmode_t flags, void *holder,
+btrfs_get_bdev_and_sb(const char *device_path, blk_mode_t flags, void *holder,
 		      int flush, struct block_device **bdev,
 		      struct btrfs_super_block **disk_super)
 {
···
  * fs_devices->device_list_mutex here.
  */
 static int btrfs_open_one_device(struct btrfs_fs_devices *fs_devices,
-			struct btrfs_device *device, fmode_t flags,
+			struct btrfs_device *device, blk_mode_t flags,
 			void *holder)
 {
 	struct block_device *bdev;
···
 }
 
 static int open_fs_devices(struct btrfs_fs_devices *fs_devices,
-				fmode_t flags, void *holder)
+				blk_mode_t flags, void *holder)
 {
 	struct btrfs_device *device;
 	struct btrfs_device *latest_dev = NULL;
···
 }
 
 int btrfs_open_devices(struct btrfs_fs_devices *fs_devices,
-		       fmode_t flags, void *holder)
+		       blk_mode_t flags, void *holder)
 {
 	int ret;
 
···
  * and we are not allowed to call set_blocksize during the scan. The superblock
  * is read via pagecache
  */
-struct btrfs_device *btrfs_scan_one_device(const char *path, fmode_t flags)
+struct btrfs_device *btrfs_scan_one_device(const char *path, blk_mode_t flags)
 {
 	struct btrfs_super_block *disk_super;
 	bool new_device_added = false;
···
 		return -ENOMEM;
 	}
 
-	ret = btrfs_get_bdev_and_sb(path, FMODE_READ, NULL, 0,
+	ret = btrfs_get_bdev_and_sb(path, BLK_OPEN_READ, NULL, 0,
 				    &bdev, &disk_super);
 	if (ret) {
 		btrfs_put_dev_args_from_path(args);
···
 	if (sb_rdonly(sb) && !fs_devices->seeding)
 		return -EROFS;
 
-	bdev = blkdev_get_by_path(device_path, FMODE_WRITE,
+	bdev = blkdev_get_by_path(device_path, BLK_OPEN_WRITE,
 				  fs_info->bdev_holder, NULL);
 	if (IS_ERR(bdev))
 		return PTR_ERR(bdev);
···
 	if (IS_ERR(fs_devices))
 		return fs_devices;
 
-	ret = open_fs_devices(fs_devices, FMODE_READ, fs_info->bdev_holder);
+	ret = open_fs_devices(fs_devices, BLK_OPEN_READ, fs_info->bdev_holder);
 	if (ret) {
 		free_fs_devices(fs_devices);
 		return ERR_PTR(ret);

fs/btrfs/volumes.h

···
 					    u64 type);
 void btrfs_mapping_tree_free(struct extent_map_tree *tree);
 int btrfs_open_devices(struct btrfs_fs_devices *fs_devices,
-		       fmode_t flags, void *holder);
-struct btrfs_device *btrfs_scan_one_device(const char *path, fmode_t flags);
+		       blk_mode_t flags, void *holder);
+struct btrfs_device *btrfs_scan_one_device(const char *path, blk_mode_t flags);
 int btrfs_forget_devices(dev_t devt);
 void btrfs_close_devices(struct btrfs_fs_devices *fs_devices);
 void btrfs_free_extra_devids(struct btrfs_fs_devices *fs_devices);

fs/erofs/super.c

···
 			return PTR_ERR(fscache);
 		dif->fscache = fscache;
 	} else if (!sbi->devs->flatdev) {
-		bdev = blkdev_get_by_path(dif->path, FMODE_READ, sb->s_type,
+		bdev = blkdev_get_by_path(dif->path, BLK_OPEN_READ, sb->s_type,
 					  NULL);
 		if (IS_ERR(bdev))
 			return PTR_ERR(bdev);

fs/ext4/super.c

···
 {
 	struct block_device *bdev;
 
-	bdev = blkdev_get_by_dev(dev, FMODE_READ | FMODE_WRITE, sb,
+	bdev = blkdev_get_by_dev(dev, BLK_OPEN_READ | BLK_OPEN_WRITE, sb,
 				 &ext4_holder_ops);
 	if (IS_ERR(bdev))
 		goto fail;

fs/f2fs/super.c

···
 	struct f2fs_super_block *raw_super = F2FS_RAW_SUPER(sbi);
 	unsigned int max_devices = MAX_DEVICES;
 	unsigned int logical_blksize;
-	fmode_t mode = sb_open_mode(sbi->sb->s_flags);
+	blk_mode_t mode = sb_open_mode(sbi->sb->s_flags);
 	int i;
 
 	/* Initialize single device information */

fs/jfs/jfs_logmgr.c

···
 	 * file systems to log may have n-to-1 relationship;
 	 */
 
-	bdev = blkdev_get_by_dev(sbi->logdev, FMODE_READ | FMODE_WRITE,
+	bdev = blkdev_get_by_dev(sbi->logdev, BLK_OPEN_READ | BLK_OPEN_WRITE,
 				 log, NULL);
 	if (IS_ERR(bdev)) {
 		rc = PTR_ERR(bdev);

fs/nfs/blocklayout/dev.c

···
 	if (!dev)
 		return -EIO;
 
-	bdev = blkdev_get_by_dev(dev, FMODE_READ | FMODE_WRITE, NULL, NULL);
+	bdev = blkdev_get_by_dev(dev, BLK_OPEN_READ | BLK_OPEN_WRITE, NULL,
+				 NULL);
 	if (IS_ERR(bdev)) {
 		printk(KERN_WARNING "pNFS: failed to open device %d:%d (%ld)\n",
 			MAJOR(dev), MINOR(dev), PTR_ERR(bdev));
···
 	if (!devname)
 		return ERR_PTR(-ENOMEM);
 
-	bdev = blkdev_get_by_path(devname, FMODE_READ | FMODE_WRITE, NULL,
+	bdev = blkdev_get_by_path(devname, BLK_OPEN_READ | BLK_OPEN_WRITE, NULL,
 				  NULL);
 	if (IS_ERR(bdev)) {
 		pr_warn("pNFS: failed to open device %s (%ld)\n",

fs/ocfs2/cluster/heartbeat.c

···
 		goto out2;
 
 	reg->hr_bdev = blkdev_get_by_dev(f.file->f_mapping->host->i_rdev,
-					 FMODE_WRITE | FMODE_READ, NULL, NULL);
+					 BLK_OPEN_WRITE | BLK_OPEN_READ, NULL,
+					 NULL);
 	if (IS_ERR(reg->hr_bdev)) {
 		ret = PTR_ERR(reg->hr_bdev);
 		reg->hr_bdev = NULL;

fs/reiserfs/journal.c

···
 			    struct reiserfs_journal *journal,
 			    const char *jdev_name)
 {
-	fmode_t blkdev_mode = FMODE_READ;
+	blk_mode_t blkdev_mode = BLK_OPEN_READ;
 	void *holder = journal;
 	int result;
 	dev_t jdev;
···
 	    new_decode_dev(SB_ONDISK_JOURNAL_DEVICE(super)) : super->s_dev;
 
 	if (!bdev_read_only(super->s_bdev))
-		blkdev_mode |= FMODE_WRITE;
+		blkdev_mode |= BLK_OPEN_WRITE;
 
 	/* there is no "jdev" option and journal is on separate device */
 	if ((!jdev_name || !jdev_name[0])) {

fs/xfs/xfs_super.c

···
 {
 	int			error = 0;
 
-	*bdevp = blkdev_get_by_path(name, FMODE_READ | FMODE_WRITE, mp,
+	*bdevp = blkdev_get_by_path(name, BLK_OPEN_READ | BLK_OPEN_WRITE, mp,
 				    &xfs_holder_ops);
 	if (IS_ERR(*bdevp)) {
 		error = PTR_ERR(*bdevp);

include/linux/blkdev.h

···
 	unsigned char				tag_size;
 };
 
+typedef unsigned int __bitwise blk_mode_t;
+
+/* open for reading */
+#define BLK_OPEN_READ		((__force blk_mode_t)(1 << 0))
+/* open for writing */
+#define BLK_OPEN_WRITE		((__force blk_mode_t)(1 << 1))
+/* open exclusively (vs other exclusive openers */
+#define BLK_OPEN_EXCL		((__force blk_mode_t)(1 << 2))
+/* opened with O_NDELAY */
+#define BLK_OPEN_NDELAY		((__force blk_mode_t)(1 << 3))
+/* open for "writes" only for ioctls (specialy hack for floppy.c) */
+#define BLK_OPEN_WRITE_IOCTL	((__force blk_mode_t)(1 << 4))
+
 struct gendisk {
 	/*
 	 * major/first_minor/minors should not be set by any new driver, the
···
 	struct badblocks *bb;
 	struct lockdep_map lockdep_map;
 	u64 diskseq;
+	blk_mode_t open_mode;
 
 	/*
 	 * Independent sector access ranges. This is always NULL for
···
 	void (*submit_bio)(struct bio *bio);
 	int (*poll_bio)(struct bio *bio, struct io_comp_batch *iob,
 			unsigned int flags);
-	int (*open)(struct gendisk *disk, fmode_t mode);
+	int (*open)(struct gendisk *disk, blk_mode_t mode);
 	void (*release)(struct gendisk *disk);
-	int (*ioctl) (struct block_device *, fmode_t, unsigned, unsigned long);
-	int (*compat_ioctl) (struct block_device *, fmode_t, unsigned, unsigned long);
+	int (*ioctl)(struct block_device *bdev, blk_mode_t mode,
+			unsigned cmd, unsigned long arg);
+	int (*compat_ioctl)(struct block_device *bdev, blk_mode_t mode,
+			unsigned cmd, unsigned long arg);
 	unsigned int (*check_events) (struct gendisk *disk,
 				      unsigned int clearing);
 	void (*unlock_native_capacity) (struct gendisk *);
···
 };
 
 #ifdef CONFIG_COMPAT
-extern int blkdev_compat_ptr_ioctl(struct block_device *, fmode_t,
+extern int blkdev_compat_ptr_ioctl(struct block_device *, blk_mode_t,
 				      unsigned int, unsigned long);
 #else
 #define blkdev_compat_ptr_ioctl NULL
···
  * as stored in sb->s_flags.
  */
 #define sb_open_mode(flags) \
-	(FMODE_READ | (((flags) & SB_RDONLY) ? 0 : FMODE_WRITE))
+	(BLK_OPEN_READ | (((flags) & SB_RDONLY) ? 0 : BLK_OPEN_WRITE))
 
-struct block_device *blkdev_get_by_dev(dev_t dev, fmode_t mode, void *holder,
+struct block_device *blkdev_get_by_dev(dev_t dev, blk_mode_t mode, void *holder,
 		const struct blk_holder_ops *hops);
-struct block_device *blkdev_get_by_path(const char *path, fmode_t mode,
+struct block_device *blkdev_get_by_path(const char *path, blk_mode_t mode,
 		void *holder, const struct blk_holder_ops *hops);
 int bd_prepare_to_claim(struct block_device *bdev, void *holder,
 		const struct blk_holder_ops *hops);

include/linux/cdrom.h

···
 
 #include <linux/fs.h>		/* not really needed, later.. */
 #include <linux/list.h>
+#include <linux/blkdev.h>
 #include <scsi/scsi_common.h>
 #include <uapi/linux/cdrom.h>
 
···
 		struct cdrom_tocentry *entry);
 
 /* the general block_device operations structure: */
-int cdrom_open(struct cdrom_device_info *cdi, fmode_t mode);
+int cdrom_open(struct cdrom_device_info *cdi, blk_mode_t mode);
 void cdrom_release(struct cdrom_device_info *cdi);
 int cdrom_ioctl(struct cdrom_device_info *cdi, struct block_device *bdev,
 		unsigned int cmd, unsigned long arg);

include/linux/device-mapper.h

···
 struct dm_dev {
 	struct block_device *bdev;
 	struct dax_device *dax_dev;
-	fmode_t mode;
+	blk_mode_t mode;
 	char name[16];
 };
 
···
  * Constructors should call these functions to ensure destination devices
  * are opened/closed correctly.
  */
-int dm_get_device(struct dm_target *ti, const char *path, fmode_t mode,
+int dm_get_device(struct dm_target *ti, const char *path, blk_mode_t mode,
 		  struct dm_dev **result);
 void dm_put_device(struct dm_target *ti, struct dm_dev *d);
 
···
 /*
  * First create an empty table.
  */
-int dm_table_create(struct dm_table **result, fmode_t mode,
+int dm_table_create(struct dm_table **result, blk_mode_t mode,
 		    unsigned int num_targets, struct mapped_device *md);
 
 /*
···
  * Queries
  */
 sector_t dm_table_get_size(struct dm_table *t);
-fmode_t dm_table_get_mode(struct dm_table *t);
+blk_mode_t dm_table_get_mode(struct dm_table *t);
 struct mapped_device *dm_table_get_md(struct dm_table *t);
 const char *dm_table_device_name(struct dm_table *t);
 

kernel/power/swap.c

···
 		return res;
 	root_swap = res;
 
-	hib_resume_bdev = blkdev_get_by_dev(swsusp_resume_device, FMODE_WRITE,
-			NULL, NULL);
+	hib_resume_bdev = blkdev_get_by_dev(swsusp_resume_device,
+			BLK_OPEN_WRITE, NULL, NULL);
 	if (IS_ERR(hib_resume_bdev))
 		return PTR_ERR(hib_resume_bdev);
 
···
 	void *holder = snapshot_test ? &swsusp_holder : NULL;
 	int error;
 
-	hib_resume_bdev = blkdev_get_by_dev(swsusp_resume_device, FMODE_READ,
+	hib_resume_bdev = blkdev_get_by_dev(swsusp_resume_device, BLK_OPEN_READ,
 					    holder, NULL);
 	if (!IS_ERR(hib_resume_bdev)) {
 		set_blocksize(hib_resume_bdev, PAGE_SIZE);

mm/swapfile.c

···
 
 	if (S_ISBLK(inode->i_mode)) {
 		p->bdev = blkdev_get_by_dev(inode->i_rdev,
-				   FMODE_READ | FMODE_WRITE, p, NULL);
+				BLK_OPEN_READ | BLK_OPEN_WRITE, p, NULL);
 		if (IS_ERR(p->bdev)) {
 			error = PTR_ERR(p->bdev);
 			p->bdev = NULL;