Edit File: blktrans.h
/* * Copyright © 2003-2010 David Woodhouse <dwmw2@infradead.org> * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA * */ #ifndef __MTD_TRANS_H__ #define __MTD_TRANS_H__ #include <linux/mutex.h> #include <linux/kref.h> #include <linux/sysfs.h> #include <linux/workqueue.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 mutex lock; int devnum; bool bg_stop; unsigned long size; int readonly; int open; struct kref ref; struct gendisk *disk; struct attribute_group *disk_attributes; struct workqueue_struct *wq; struct work_struct work; struct request_queue *rq; spinlock_t queue_lock; void *priv; fmode_t file_mode; }; struct mtd_blktrans_ops { char *name; int major; int part_bits; int blksize; int blkshift; /* 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); int (*discard)(struct mtd_blktrans_dev *dev, unsigned long block, unsigned nr_blocks); void (*background)(struct mtd_blktrans_dev *dev); /* 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); void (*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; }; 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); extern int mtd_blktrans_cease_background(struct mtd_blktrans_dev *dev); #endif /* __MTD_TRANS_H__ */