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 --- v2 add missing sprintf() statement in unit test --- include/uuid.h | 8 ++++---- lib/uuid.c | 18 ++++++++++++------ lib/vsprintf.c | 14 ++++++++------ test/print_ut.c | 23 +++++++++++++++++++++++ 4 files changed, 47 insertions(+), 16 deletions(-)

diff --git a/include/uuid.h b/include/uuid.h index 124bbce8a2..47d5b0d8d4 100644 --- a/include/uuid.h +++ b/include/uuid.h @@ -16,10 +16,10 @@ 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 1 +#define UUID_STR_UPPER_CASE 2

#define UUID_STR_LEN 36 #define UUID_BIN_LEN sizeof(struct uuid) diff --git a/lib/uuid.c b/lib/uuid.c index fa20ee39fc..14d7f8ce7e 100644 --- a/lib/uuid.c +++ b/lib/uuid.c @@ -187,9 +187,10 @@ int uuid_str_to_bin(char *uuid_str, unsigned char *uuid_bin, int str_format) /* * uuid_bin_to_str() - convert big endian binary data to string UUID or GUID. * - * @param uuid_bin - pointer to binary data of UUID (big endian) [16B] - * @param uuid_str - pointer to allocated array for output string [37B] - * @str_format - UUID string format: 0 - UUID; 1 - GUID + * @param uuid_bin: pointer to binary data of UUID (big endian) [16B] + * @param uuid_str: pointer to allocated array for output string [37B] + * @str_format: bit 0: 0 - UUID; 1 - GUID + * bit 1: 0 - lower case; 2 - upper case */ void uuid_bin_to_str(unsigned char *uuid_bin, char *uuid_str, int str_format) { @@ -198,6 +199,7 @@ void uuid_bin_to_str(unsigned char *uuid_bin, char *uuid_str, int str_format) const u8 guid_char_order[UUID_BIN_LEN] = {3, 2, 1, 0, 5, 4, 7, 6, 8, 9, 10, 11, 12, 13, 14, 15}; const u8 *char_order; + const char *format; int i;

/* @@ -205,13 +207,17 @@ void uuid_bin_to_str(unsigned char *uuid_bin, char *uuid_str, int str_format) * 4B-2B-2B-2B-6B * be be be be be */ - if (str_format == UUID_STR_FORMAT_STD) + if (str_format & UUID_STR_FORMAT_GUID) + char_order = guid_char_order; + else char_order = uuid_char_order; + if (str_format & UUID_STR_UPPER_CASE) + format = "%02X"; else - char_order = guid_char_order; + format = "%02x";

for (i = 0; i < 16; i++) { - sprintf(uuid_str, "%02x", uuid_bin[char_order[i]]); + sprintf(uuid_str, format, uuid_bin[char_order[i]]); uuid_str += 2; switch (i) { case 3: diff --git a/lib/vsprintf.c b/lib/vsprintf.c index 2403825dc9..f1332df0f3 100644 --- a/lib/vsprintf.c +++ b/lib/vsprintf.c @@ -382,29 +382,31 @@ static char *ip4_addr_string(char *buf, char *end, u8 *addr, int field_width,

#ifdef CONFIG_LIB_UUID /* - * This works (roughly) the same way as linux's, but we currently always - * print lower-case (ie. we just keep %pUB and %pUL for compat with linux), - * mostly just because that is what uuid_bin_to_str() supports. + * This works (roughly) the same way as Linux's. * * %pUb: 01020304-0506-0708-090a-0b0c0d0e0f10 + * %pUB: 01020304-0506-0708-090A-0B0C0D0E0F10 * %pUl: 04030201-0605-0807-090a-0b0c0d0e0f10 + * %pUL: 04030201-0605-0807-090A-0B0C0D0E0F10 */ static char *uuid_string(char *buf, char *end, u8 *addr, int field_width, int precision, int flags, const char *fmt) { char uuid[UUID_STR_LEN + 1]; - int str_format = UUID_STR_FORMAT_STD; + int str_format;

switch (*(++fmt)) { case 'L': + str_format = UUID_STR_FORMAT_GUID | UUID_STR_UPPER_CASE; + break; case 'l': str_format = UUID_STR_FORMAT_GUID; break; case 'B': - case 'b': - /* this is the default */ + str_format = UUID_STR_FORMAT_STD | UUID_STR_UPPER_CASE; break; default: + str_format = UUID_STR_FORMAT_STD; break; }

diff --git a/test/print_ut.c b/test/print_ut.c index f0f1d6010a..173860451d 100644 --- a/test/print_ut.c +++ b/test/print_ut.c @@ -15,6 +15,26 @@ #define FAKE_BUILD_TAG "jenkins-u-boot-denx_uboot_dm-master-build-aarch64" \ "and a lot more text to come"

+/* Test printing GUIDs */ +static void guid_ut_print(void) +{ +#if CONFIG_IS_ENABLED(LIB_UUID) + unsigned char guid[16] = { + 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16 + }; + char str[40]; + + sprintf(str, "%pUb", guid); + assert(!strcmp("01020304-0506-0708-090a-0b0c0d0e0f10", str)); + sprintf(str, "%pUB", guid); + assert(!strcmp("01020304-0506-0708-090A-0B0C0D0E0F10", str)); + sprintf(str, "%pUl", guid); + assert(!strcmp("04030201-0605-0807-090a-0b0c0d0e0f10", str)); + sprintf(str, "%pUL", guid); + assert(!strcmp("04030201-0605-0807-090A-0B0C0D0E0F10", str)); +#endif +} + /* Test efi_loader specific printing */ static void efi_ut_print(void) { @@ -113,6 +133,9 @@ static int do_ut_print(cmd_tbl_t *cmdtp, int flag, int argc, /* Test efi_loader specific printing */ efi_ut_print();

+ /* Test printing GUIDs */ + guid_ut_print(); + printf("%s: Everything went swimmingly\n", __func__); return 0; } -- 2.20.1