2d9d230089
Some block devices need an explicit callback for flushing written blocks. Add this callback. Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
48 lines
1.1 KiB
C
48 lines
1.1 KiB
C
#ifndef __BLOCK_H
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#define __BLOCK_H
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#include <driver.h>
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#include <linux/list.h>
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struct block_device;
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struct block_device_ops {
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int (*read)(struct block_device *, void *buf, int block, int num_blocks);
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int (*write)(struct block_device *, const void *buf, int block, int num_blocks);
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int (*flush)(struct block_device *);
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};
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struct chunk;
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struct block_device {
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struct device_d *dev;
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struct list_head list;
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struct block_device_ops *ops;
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int blockbits;
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int num_blocks;
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int rdbufsize;
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int blkmask;
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struct list_head buffered_blocks;
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struct list_head idle_blocks;
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struct cdev cdev;
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};
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extern struct list_head block_device_list;
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#define for_each_block_device(bdev) list_for_each_entry(bdev, &block_device_list, list)
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int blockdevice_register(struct block_device *blk);
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int blockdevice_unregister(struct block_device *blk);
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int block_read(struct block_device *blk, void *buf, int block, int num_blocks);
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int block_write(struct block_device *blk, void *buf, int block, int num_blocks);
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static inline int block_flush(struct block_device *blk)
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{
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return cdev_flush(&blk->cdev);
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}
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#endif /* __BLOCK_H */
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