forked from mirrors/linux
658afed19c
Instead of propagating the fmode_t, just use a bool to track if a mtd block device was opened for writing. Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Hannes Reinecke <hare@suse.de> Acked-by: Christian Brauner <brauner@kernel.org> Acked-by: Richard Weinberger <richard@nod.at> Link: https://lore.kernel.org/r/20230608110258.189493-23-hch@lst.de Signed-off-by: Jens Axboe <axboe@kernel.dk>
92 lines
2.6 KiB
C
92 lines
2.6 KiB
C
/* SPDX-License-Identifier: GPL-2.0-or-later */
|
|
/*
|
|
* Copyright © 2003-2010 David Woodhouse <dwmw2@infradead.org>
|
|
*/
|
|
|
|
#ifndef __MTD_TRANS_H__
|
|
#define __MTD_TRANS_H__
|
|
|
|
#include <linux/mutex.h>
|
|
#include <linux/kref.h>
|
|
#include <linux/sysfs.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 request_queue *rq;
|
|
struct list_head rq_list;
|
|
struct blk_mq_tag_set *tag_set;
|
|
spinlock_t queue_lock;
|
|
void *priv;
|
|
bool writable;
|
|
};
|
|
|
|
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);
|
|
|
|
/**
|
|
* module_mtd_blktrans() - Helper macro for registering a mtd blktrans driver
|
|
* @__mtd_blktrans: mtd_blktrans_ops struct
|
|
*
|
|
* Helper macro for mtd blktrans drivers which do not do anything special in
|
|
* module init/exit. This eliminates a lot of boilerplate. Each module may only
|
|
* use this macro once, and calling it replaces module_init() and module_exit()
|
|
*/
|
|
#define module_mtd_blktrans(__mtd_blktrans) \
|
|
module_driver(__mtd_blktrans, register_mtd_blktrans, \
|
|
deregister_mtd_blktrans)
|
|
|
|
#endif /* __MTD_TRANS_H__ */
|