blktrans.h
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上传日期:2009-04-28
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- /*
- * $Id: blktrans.h,v 1.5 2003/06/23 12:00:08 dwmw2 Exp $
- *
- * (C) 2003 David Woodhouse <dwmw2@infradead.org>
- *
- * Interface to Linux block layer for MTD 'translation layers'.
- *
- */
- #ifndef __MTD_TRANS_H__
- #define __MTD_TRANS_H__
- #include <asm/semaphore.h>
- struct hd_geometry;
- struct mtd_info;
- struct mtd_blktrans_ops;
- struct file;
- struct inode;
- struct mtd_blktrans_dev {
- struct mtd_blktrans_ops *tr;
- struct list_head list;
- struct mtd_info *mtd;
- struct semaphore sem;
- int devnum;
- int blksize;
- unsigned long size;
- int readonly;
- void *blkcore_priv; /* gendisk in 2.5, devfs_handle in 2.4 */
- };
- struct blkcore_priv; /* Differs for 2.4 and 2.5 kernels; private */
- struct mtd_blktrans_ops {
- char *name;
- int major;
- int part_bits;
- /* Access functions */
- int (*readsect)(struct mtd_blktrans_dev *dev,
- unsigned long block, char *buffer);
- int (*writesect)(struct mtd_blktrans_dev *dev,
- unsigned long block, char *buffer);
- /* Block layer ioctls */
- int (*getgeo)(struct mtd_blktrans_dev *dev, struct hd_geometry *geo);
- int (*flush)(struct mtd_blktrans_dev *dev);
- /* Called with mtd_table_mutex held; no race with add/remove */
- int (*open)(struct mtd_blktrans_dev *dev);
- int (*release)(struct mtd_blktrans_dev *dev);
- /* Called on {de,}registration and on subsequent addition/removal
- of devices, with mtd_table_mutex held. */
- void (*add_mtd)(struct mtd_blktrans_ops *tr, struct mtd_info *mtd);
- void (*remove_dev)(struct mtd_blktrans_dev *dev);
- struct list_head devs;
- struct list_head list;
- struct module *owner;
- struct mtd_blkcore_priv *blkcore_priv;
- };
- extern int register_mtd_blktrans(struct mtd_blktrans_ops *tr);
- extern int deregister_mtd_blktrans(struct mtd_blktrans_ops *tr);
- extern int add_mtd_blktrans_dev(struct mtd_blktrans_dev *dev);
- extern int del_mtd_blktrans_dev(struct mtd_blktrans_dev *dev);
-
- #endif /* __MTD_TRANS_H__ */