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block/partitions/ldm.c: use generic UUID library 

Instead of opencoding let's use generic UUID library functions here.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Cc: "Richard Russon (FlatCap)" <ldm@flatcap.org>
Cc: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Andy Shevchenko 2016-05-20 17:01:27 -07:00 committed by Linus Torvalds
parent 6357978575
commit 7244ad69cc
1 changed files with 4 additions and 56 deletions
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60
block/partitions/ldm.c
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@ -27,6 +27,8 @@
#include <linux/pagemap.h> #include <linux/pagemap.h>
#include <linux/stringify.h> #include <linux/stringify.h>
#include <linux/kernel.h> #include <linux/kernel.h>
#include <linux/uuid.h>
#include "ldm.h" #include "ldm.h"
#include "check.h" #include "check.h"
#include "msdos.h" #include "msdos.h"
@ -65,60 +67,6 @@ void _ldm_printk(const char *level, const char *function, const char *fmt, ...)
va_end(args); va_end(args);
} }
/**
* ldm_parse_hexbyte - Convert a ASCII hex number to a byte
* @src: Pointer to at least 2 characters to convert.
*
* Convert a two character ASCII hex string to a number.
*
* Return: 0-255 Success, the byte was parsed correctly
* -1 Error, an invalid character was supplied
*/
static int ldm_parse_hexbyte (const u8 *src)
{
unsigned int x; /* For correct wrapping */
int h;
/* high part */
x = h = hex_to_bin(src[0]);
if (h < 0)
return -1;
/* low part */
h = hex_to_bin(src[1]);
if (h < 0)
return -1;
return (x << 4) + h;
}
/**
* ldm_parse_guid - Convert GUID from ASCII to binary
* @src: 36 char string of the form fa50ff2b-f2e8-45de-83fa-65417f2f49ba
* @dest: Memory block to hold binary GUID (16 bytes)
*
* N.B. The GUID need not be NULL terminated.
*
* Return: 'true' @dest contains binary GUID
* 'false' @dest contents are undefined
*/
static bool ldm_parse_guid (const u8 *src, u8 *dest)
{
static const int size[] = { 4, 2, 2, 2, 6 };
int i, j, v;
if (src[8] != '-' || src[13] != '-' ||
src[18] != '-' || src[23] != '-')
return false;
for (j = 0; j < 5; j++, src++)
for (i = 0; i < size[j]; i++, src+=2, *dest++ = v)
if ((v = ldm_parse_hexbyte (src)) < 0)
return false;
return true;
}
/** /**
* ldm_parse_privhead - Read the LDM Database PRIVHEAD structure * ldm_parse_privhead - Read the LDM Database PRIVHEAD structure
* @data: Raw database PRIVHEAD structure loaded from the device * @data: Raw database PRIVHEAD structure loaded from the device
@ -167,7 +115,7 @@ static bool ldm_parse_privhead(const u8 *data, struct privhead *ph)
ldm_error("PRIVHEAD disk size doesn't match real disk size"); ldm_error("PRIVHEAD disk size doesn't match real disk size");
return false; return false;
} }
if (!ldm_parse_guid(data + 0x0030, ph->disk_id)) { if (uuid_be_to_bin(data + 0x0030, (uuid_be *)ph->disk_id)) {
ldm_error("PRIVHEAD contains an invalid GUID."); ldm_error("PRIVHEAD contains an invalid GUID.");
return false; return false;
} }
@ -944,7 +892,7 @@ static bool ldm_parse_dsk3 (const u8 *buffer, int buflen, struct vblk *vb)
disk = &vb->vblk.disk; disk = &vb->vblk.disk;
ldm_get_vstr (buffer + 0x18 + r_diskid, disk->alt_name, ldm_get_vstr (buffer + 0x18 + r_diskid, disk->alt_name,
sizeof (disk->alt_name)); sizeof (disk->alt_name));
if (!ldm_parse_guid (buffer + 0x19 + r_name, disk->disk_id)) if (uuid_be_to_bin(buffer + 0x19 + r_name, (uuid_be *)disk->disk_id))
return false; return false;
return true; return true;