Commit 430cc5d3 authored by Christoph Hellwig's avatar Christoph Hellwig Committed by Jens Axboe
Browse files

block: cleanup the GENHD_FL_* definitions 



Switch to an enum and tidy up the documentation.

Signed-off-by: default avatarChristoph Hellwig <hch@lst.de>
Link: https://lore.kernel.org/r/20211122130625.1136848-14-hch@lst.de


Signed-off-by: default avatarJens Axboe <axboe@kernel.dk>
parent 9f18db57

include/linux/genhd.h

+14 −18
Original line number Diff line number Diff line
@@ -39,28 +39,24 @@ struct partition_meta_info { 
/**

 * DOC: genhd capability flags

 *

 * ``GENHD_FL_REMOVABLE`` (0x0001): indicates that the block device

 * gives access to removable media.

 * When set, the device remains present even when media is not

 * inserted.

 * Must not be set for devices which are removed entirely when the

 * ``GENHD_FL_REMOVABLE``: indicates that the block device gives access to

 * removable media.  When set, the device remains present even when media is not

 * inserted.  Shall not be set for devices which are removed entirely when the

 * media is removed.

 *

 * ``GENHD_FL_NO_PART`` (0x0200): partition support is disabled.

 * The kernel will not scan for partitions from add_disk, and users

 * can't add partitions manually.

 * ``GENHD_FL_HIDDEN``: the block device is hidden; it doesn't produce events,

 * doesn't appear in sysfs, and can't be opened from userspace or using

 * blkdev_get*. Used for the underlying components of multipath devices.

 *

 * ``GENHD_FL_NO_PART``: partition support is disabled.  The kernel will not

 * scan for partitions from add_disk, and users can't add partitions manually.

 *

 * ``GENHD_FL_HIDDEN`` (0x0400): the block device is hidden; it

 * doesn't produce events, doesn't appear in sysfs, and doesn't have

 * an associated ``bdev``.

 * Implies ``GENHD_FL_NO_PART``.

 * Used for multipath devices.

 */

#define GENHD_FL_REMOVABLE			0x0001

/* 2 is unused (used to be GENHD_FL_DRIVERFS) */

/* 4 is unused (used to be GENHD_FL_MEDIA_CHANGE_NOTIFY) */

#define GENHD_FL_NO_PART			0x0200

#define GENHD_FL_HIDDEN				0x0400

enum {

	GENHD_FL_REMOVABLE			= 1 << 0,

	GENHD_FL_HIDDEN				= 1 << 1,

	GENHD_FL_NO_PART			= 1 << 2,

};



enum {

	DISK_EVENT_MEDIA_CHANGE			= 1 << 0, /* media changed */