Re: block_device_operations change since 2.6.27.X

[Ralf Hornik Mailings <ralf@xxxxxxxxxxxxxxxxx>]

Ralf Hornik Mailings <ralf@xxxxxxxxxxxxxxxxx> wrote:

> I'm trying to port adics cvfs module to any newer kernel and had to  
> figure out that the prototype of "block_device_operations" has  
> become incompatible with code formerly used against kernel <=  
> 2.6.27.46
>
> Unfortunately the documentation in filesystems/Locking does still  
> point to the old prototype.
> Can somebody give me some hints how to use the new  
> block_device_operations defined in blkdev.h or send me some new  
> dokumentation?

Can noone tell me how to use the new object?

The new struct is:

struct block_device_operations {
        int (*open) (struct block_device *, fmode_t);
        int (*release) (struct gendisk *, fmode_t);
        int (*locked_ioctl) (struct block_device *, fmode_t,  
unsigned, unsigned long);
        int (*ioctl) (struct block_device *, fmode_t, unsigned,  
unsigned long);
        int (*compat_ioctl) (struct block_device *, fmode_t,  
unsigned, unsigned long);
        int (*direct_access) (struct block_device *, sector_t,
                                                void **, unsigned long *);
        int (*media_changed) (struct gendisk *);
        unsigned long long (*set_capacity) (struct gendisk *,
                                                unsigned long long);
        int (*revalidate_disk) (struct gendisk *);
        int (*getgeo)(struct block_device *, struct hd_geometry *);
        struct module *owner;
};

and here is the stuct used in <= 2.6.27

struct block_device_operations {
        int (*open) (struct inode *, struct file *);
        int (*release) (struct inode *, struct file *);
        int (*ioctl) (struct inode *, struct file *, unsigned, unsigned long);
        long (*unlocked_ioctl) (struct file *, unsigned, unsigned long);
        long (*compat_ioctl) (struct file *, unsigned, unsigned long);
        int (*direct_access) (struct block_device *, sector_t,  
unsigned long *);
        int (*media_changed) (struct gendisk *);
        int (*revalidate_disk) (struct gendisk *);
        int (*getgeo)(struct block_device *, struct hd_geometry *);
        struct module *owner;
};

And the dokumentation of any kernel still points to the 2.6.27.
Any help would greatly appreciated

Ralf





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