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Driver core: convert block from raw kobjects to core devices

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This moves the block devices to /sys/class/block. It will create a
flat list of all block devices, with the disks and partitions in one
directory. For compatibility /sys/block is created and contains symlinks
to the disks.

  /sys/class/block
  |-- sda -> ../../devices/pci0000:00/0000:00:1f.2/host0/target0:0:0/0:0:0:0/block/sda
  |-- sda1 -> ../../devices/pci0000:00/0000:00:1f.2/host0/target0:0:0/0:0:0:0/block/sda/sda1
  |-- sda10 -> ../../devices/pci0000:00/0000:00:1f.2/host0/target0:0:0/0:0:0:0/block/sda/sda10
  |-- sda5 -> ../../devices/pci0000:00/0000:00:1f.2/host0/target0:0:0/0:0:0:0/block/sda/sda5
  |-- sda6 -> ../../devices/pci0000:00/0000:00:1f.2/host0/target0:0:0/0:0:0:0/block/sda/sda6
  |-- sda7 -> ../../devices/pci0000:00/0000:00:1f.2/host0/target0:0:0/0:0:0:0/block/sda/sda7
  |-- sda8 -> ../../devices/pci0000:00/0000:00:1f.2/host0/target0:0:0/0:0:0:0/block/sda/sda8
  |-- sda9 -> ../../devices/pci0000:00/0000:00:1f.2/host0/target0:0:0/0:0:0:0/block/sda/sda9
  `-- sr0 -> ../../devices/pci0000:00/0000:00:1f.2/host1/target1:0:0/1:0:0:0/block/sr0

  /sys/block/
  |-- sda -> ../devices/pci0000:00/0000:00:1f.2/host0/target0:0:0/0:0:0:0/block/sda
  `-- sr0 -> ../devices/pci0000:00/0000:00:1f.2/host1/target1:0:0/1:0:0:0/block/sr0

Signed-off-by: Kay Sievers <kay.sievers@vrfy.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Kay Sievers
2007-05-21 22:08:01 +02:00
committed by Greg Kroah-Hartman
parent 09f82ea928
commit edfaa7c365
13 changed files with 389 additions and 614 deletions
Download Patch File Download Diff File Expand all files Collapse all files

37
include/linux/genhd.h
View File

@@ -10,9 +10,19 @@
*/
#include <linux/types.h>
#include <linux/kdev_t.h>
#ifdef CONFIG_BLOCK
#define kobj_to_dev(k) container_of(k, struct device, kobj)
#define dev_to_disk(device) container_of(device, struct gendisk, dev)
#define dev_to_part(device) container_of(device, struct hd_struct, dev)
extern struct device_type disk_type;
extern struct device_type part_type;
extern struct kobject *block_depr;
extern struct class block_class;
enum {
/* These three have identical behaviour; use the second one if DOS FDISK gets
confused about extended/logical partitions starting past cylinder 1023. */
@@ -84,7 +94,7 @@ struct partition {
struct hd_struct {
sector_t start_sect;
sector_t nr_sects;
struct kobject kobj;
struct device dev;
struct kobject *holder_dir;
unsigned ios[2], sectors[2]; /* READs and WRITEs */
int policy, partno;
@@ -117,15 +127,14 @@ struct gendisk {
* disks that can't be partitioned. */
char disk_name[32]; /* name of major driver */
struct hd_struct **part; /* [indexed by minor] */
int part_uevent_suppress;
struct block_device_operations *fops;
struct request_queue *queue;
void *private_data;
sector_t capacity;
int flags;
struct device *driverfs_dev;
struct kobject kobj;
struct device *driverfs_dev; // FIXME: remove
struct device dev;
struct kobject *holder_dir;
struct kobject *slave_dir;
@@ -143,13 +152,6 @@ struct gendisk {
struct work_struct async_notify;
};
/* Structure for sysfs attributes on block devices */
struct disk_attribute {
struct attribute attr;
ssize_t (*show)(struct gendisk *, char *);
ssize_t (*store)(struct gendisk *, const char *, size_t);
};
/*
* Macros to operate on percpu disk statistics:
*
@@ -411,7 +413,8 @@ struct unixware_disklabel {
#define ADDPART_FLAG_RAID 1
#define ADDPART_FLAG_WHOLEDISK 2
char *disk_name (struct gendisk *hd, int part, char *buf);
extern dev_t blk_lookup_devt(const char *name);
extern char *disk_name (struct gendisk *hd, int part, char *buf);
extern int rescan_partitions(struct gendisk *disk, struct block_device *bdev);
extern void add_partition(struct gendisk *, int, sector_t, sector_t, int);
@@ -423,12 +426,12 @@ extern struct gendisk *alloc_disk(int minors);
extern struct kobject *get_disk(struct gendisk *disk);
extern void put_disk(struct gendisk *disk);
extern void genhd_media_change_notify(struct gendisk *disk);
extern void blk_register_region(dev_t dev, unsigned long range,
extern void blk_register_region(dev_t devt, unsigned long range,
struct module *module,
struct kobject *(*probe)(dev_t, int *, void *),
int (*lock)(dev_t, void *),
void *data);
extern void blk_unregister_region(dev_t dev, unsigned long range);
extern void blk_unregister_region(dev_t devt, unsigned long range);
static inline struct block_device *bdget_disk(struct gendisk *disk, int index)
{
@@ -441,6 +444,12 @@ static inline struct block_device *bdget_disk(struct gendisk *disk, int index)
static inline void printk_all_partitions(void) { }
static inline dev_t blk_lookup_devt(const char *name)
{
dev_t devt = MKDEV(0, 0);
return devt;
}
#endif /* CONFIG_BLOCK */
#endif