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lib/vsprintf: allow printing upper case GUIDs

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In the UEFI context GUIDs are expected to be rendered in upper case.

The patch uses the formerly unused bit 1 of the parameter str_format
of function uuid_bin_to_str() to indicate if we need upper or lower case
output.

Function uuid_string() in vsprint.c is adjusted to correctly set the bit
depending on the print format code.

%pUb: 01020304-0506-0708-090a-0b0c0d0e0f10
%pUB: 01020304-0506-0708-090A-0B0C0D0E0F10
%pUl: 04030201-0605-0807-090a-0b0c0d0e0f10
%pUL: 04030201-0605-0807-090A-0B0C0D0E0F10

Up to this point only a diagnostic message in mount_ubifs() using '%pUB' is
concerned by the change. Further patches are needed to adjust the UEFI
subsystem.

A unit test is provided inside the ut_print command.

Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
This commit is contained in:
Heinrich Schuchardt
2019-04-29 08:08:43 +02:00
committed by Tom Rini
parent dbbb1c43f2
commit 3bad256f5b
4 changed files with 50 additions and 17 deletions
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10
include/uuid.h
View File

@@ -6,6 +6,8 @@
#ifndef __UUID_H__
#define __UUID_H__
#include <linux/bitops.h>
/* This is structure is in big-endian */
struct uuid {
unsigned int time_low;
@@ -16,10 +18,10 @@ struct uuid {
unsigned char node[6];
} __packed;
enum {
UUID_STR_FORMAT_STD,
UUID_STR_FORMAT_GUID
};
/* Bits of a bitmask specifying the output format for GUIDs */
#define UUID_STR_FORMAT_STD 0
#define UUID_STR_FORMAT_GUID BIT(0)
#define UUID_STR_UPPER_CASE BIT(1)
#define UUID_STR_LEN 36
#define UUID_BIN_LEN sizeof(struct uuid)