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block: Collect block devices on list 

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
This commit is contained in:
Sascha Hauer 2013-09-27 16:32:55 +02:00
parent 7a1c5027f9
commit 4dda27ce49
2 changed files with 11 additions and 0 deletions
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5
common/block.c
View File

@ -25,6 +25,8 @@
#define BLOCKSIZE(blk) (1 << blk->blockbits)
LIST_HEAD(block_device_list);
/* a chunk of contigous data */
struct chunk {
void *data; /* data buffer */
@ -367,6 +369,8 @@ int blockdevice_register(struct block_device *blk)
if (ret)
return ret;
list_add_tail(&blk->list, &block_device_list);
return 0;
}
@ -387,6 +391,7 @@ int blockdevice_unregister(struct block_device *blk)
}
devfs_remove(&blk->cdev);
list_del(&blk->list);
return 0;
}

6
include/block.h
View File

@ -2,6 +2,7 @@
#define __BLOCK_H
#include <driver.h>
#include <linux/list.h>
struct block_device;
@ -14,6 +15,7 @@ struct chunk;
struct block_device {
struct device_d *dev;
struct list_head list;
struct block_device_ops *ops;
int blockbits;
int num_blocks;
@ -26,6 +28,10 @@ struct block_device {
struct cdev cdev;
};
extern struct list_head block_device_list;
#define for_each_block_device(bdev) list_for_each_entry(bdev, &block_device_list, list)
int blockdevice_register(struct block_device *blk);
int blockdevice_unregister(struct block_device *blk);