1.1 --- a/src/bdev.c	Fri Dec 09 13:44:15 2011 +0200
     1.2 +++ b/src/bdev.c	Fri Dec 09 15:29:54 2011 +0200
     1.3 @@ -1,11 +1,13 @@
     1.4  #include <stdlib.h>
     1.5 +#include <string.h>
     1.6  #include <assert.h>
     1.7  #include "bdev.h"
     1.8  #include "ata.h"
     1.9  #include "part.h"
    1.10  
    1.11 -#define MINOR_DISK(x)	(((x) >> 4) & 0xf)
    1.12 -#define MINOR_PART(x)	((x) & 0xf)
    1.13 +#define MKMINOR(disk, part)	((((disk) & 0xf) << 4) | ((part) & 0xf))
    1.14 +#define MINOR_DISK(x)		(((x) >> 4) & 0xf)
    1.15 +#define MINOR_PART(x)		((x) & 0xf)
    1.16  
    1.17  struct block_device *blk_open(dev_t dev)
    1.18  {
    1.19 @@ -84,3 +86,35 @@
    1.20  	}
    1.21  	return 0;
    1.22  }
    1.23 +
    1.24 +dev_t bdev_by_name(const char *name)
    1.25 +{
    1.26 +	int minor;
    1.27 +	int atadev, part = 0;
    1.28 +
    1.29 +	char *tmp = strrchr(name, '/');
    1.30 +	if(tmp) {
    1.31 +		name = tmp + 1;
    1.32 +	}
    1.33 +
    1.34 +	if(strstr(name, "ata") != name) {
    1.35 +		return 0;
    1.36 +	}
    1.37 +	name += 3;
    1.38 +
    1.39 +	atadev = strtol(name, &tmp, 10);
    1.40 +	if(tmp == name) {
    1.41 +		return 0;
    1.42 +	}
    1.43 +	name = tmp;
    1.44 +
    1.45 +	if(*name++ == 'p') {
    1.46 +		part = strtol(name, &tmp, 10) + 1;
    1.47 +		if(tmp == name) {
    1.48 +			return 0;
    1.49 +		}
    1.50 +	}
    1.51 +
    1.52 +	minor = MKMINOR(atadev, part);
    1.53 +	return DEVNO(0, minor);
    1.54 +}