diff options
Diffstat (limited to 'include/linux/blkdev.h')
| -rw-r--r-- | include/linux/blkdev.h | 47 |
1 files changed, 47 insertions, 0 deletions
diff --git a/include/linux/blkdev.h b/include/linux/blkdev.h new file mode 100644 index 000000000..84b48d93c --- /dev/null +++ b/include/linux/blkdev.h @@ -0,0 +1,47 @@ +#ifndef _LINUX_BLKDEV_H +#define _LINUX_BLKDEV_H + +#include <linux/major.h> +#include <linux/sched.h> +#include <linux/genhd.h> + +/* + * Ok, this is an expanded form so that we can use the same + * request for paging requests when that is implemented. In + * paging, 'bh' is NULL, and the semaphore is used to wait + * for read/write completion. + */ +struct request { + int dev; /* -1 if no request */ + int cmd; /* READ or WRITE */ + int errors; + unsigned long sector; + unsigned long nr_sectors; + unsigned long current_nr_sectors; + char * buffer; + struct semaphore * sem; + struct buffer_head * bh; + struct buffer_head * bhtail; + struct request * next; +}; + +struct blk_dev_struct { + void (*request_fn)(void); + struct request * current_request; +}; + +struct sec_size { + unsigned block_size; + unsigned block_size_bits; +}; + +extern struct sec_size * blk_sec[MAX_BLKDEV]; +extern struct blk_dev_struct blk_dev[MAX_BLKDEV]; +extern struct wait_queue * wait_for_request; +extern void resetup_one_dev(struct gendisk *dev, int drive); + +extern int * blk_size[MAX_BLKDEV]; + +extern int * blksize_size[MAX_BLKDEV]; + +#endif |