On 24.01.19 12:04, AKASHI Takahiro wrote:
> "env [print|set] -e" allows for handling uefi variables without
> knowing details about mapping to corresponding u-boot variables.
>
> Signed-off-by: AKASHI Takahiro <takahiro.aka...@linaro.org>
> ---
> MAINTAINERS | 1 +
> cmd/Kconfig | 6 +
> cmd/Makefile | 1 +
> cmd/nvedit.c | 28 +++-
> cmd/nvedit_efi.c | 319 ++++++++++++++++++++++++++++++++++++++++++++++
> include/command.h | 4 +
> 6 files changed, 358 insertions(+), 1 deletion(-)
> create mode 100644 cmd/nvedit_efi.c
>
> diff --git a/MAINTAINERS b/MAINTAINERS
> index ae825014bda9..22ac686ab2d6 100644
> --- a/MAINTAINERS
> +++ b/MAINTAINERS
> @@ -438,6 +438,7 @@ F: lib/efi*/
> F: test/py/tests/test_efi*
> F: test/unicode_ut.c
> F: cmd/bootefi.c
> +F: cmd/nvedit_efi.c
> F: tools/file2include.c
>
> FPGA
> diff --git a/cmd/Kconfig b/cmd/Kconfig
> index ea1a325eb301..812a7eb9b74b 100644
> --- a/cmd/Kconfig
> +++ b/cmd/Kconfig
> @@ -53,6 +53,12 @@ config SYS_PROMPT
> This string is displayed in the command line to the left of the
> cursor.
>
> +config CMD_NVEDIT_EFI
> + bool
> + depends on EFI_LOADER
> + default y if EFI_LOADER
No need for the "if EFI_LOADER" here. You only ever get to run the
default path when EFI_LOADER is set due to the depends on line before.
> + imply HEXDUMP
> +
> menu "Autoboot options"
>
> config AUTOBOOT
> diff --git a/cmd/Makefile b/cmd/Makefile
> index 15ae4d250f50..142e0ee222ca 100644
> --- a/cmd/Makefile
> +++ b/cmd/Makefile
> @@ -98,6 +98,7 @@ obj-$(CONFIG_CMD_MTD) += mtd.o
> obj-$(CONFIG_CMD_MTDPARTS) += mtdparts.o
> obj-$(CONFIG_CMD_NAND) += nand.o
> obj-$(CONFIG_CMD_NET) += net.o
> +obj-$(CONFIG_CMD_NVEDIT_EFI) += nvedit_efi.o
> obj-$(CONFIG_CMD_ONENAND) += onenand.o
> obj-$(CONFIG_CMD_OSD) += osd.o
> obj-$(CONFIG_CMD_PART) += part.o
> diff --git a/cmd/nvedit.c b/cmd/nvedit.c
> index ce746bbf1b3e..7973d7add5fc 100644
> --- a/cmd/nvedit.c
> +++ b/cmd/nvedit.c
> @@ -119,6 +119,11 @@ static int do_env_print(cmd_tbl_t *cmdtp, int flag, int
> argc,
> int rcode = 0;
> int env_flag = H_HIDE_DOT;
>
> +#if defined(CONFIG_CMD_NVEDIT_EFI)
> + if (argc > 1 && argv[1][0] == '-' && argv[1][1] == 'e')
> + return do_env_print_efi(cmdtp, flag, --argc, ++argv);
> +#endif
> +
> if (argc > 1 && argv[1][0] == '-' && argv[1][1] == 'a') {
> argc--;
> argv++;
> @@ -216,6 +221,12 @@ static int _do_env_set(int flag, int argc, char * const
> argv[], int env_flag)
> ENTRY e, *ep;
>
> debug("Initial value for argc=%d\n", argc);
> +
> +#if defined(CONFIG_CMD_NVEDIT_EFI)
> + if (argc > 1 && argv[1][0] == '-' && argv[1][1] == 'e')
> + return do_env_set_efi(NULL, flag, --argc, ++argv);
> +#endif
> +
> while (argc > 1 && **(argv + 1) == '-') {
> char *arg = *++argv;
>
> @@ -1263,14 +1274,21 @@ static char env_help_text[] =
> "env import [-d] [-t [-r] | -b | -c] addr [size] [var ...] - import
> environment\n"
> #endif
> "env print [-a | name ...] - print environment\n"
> +#if defined(CONFIG_CMD_NVEDIT_EFI)
> + "env print -e [name ...] - print UEFI environment\n"
> +#endif
> #if defined(CONFIG_CMD_RUN)
> "env run var [...] - run commands in an environment variable\n"
> #endif
> #if defined(CONFIG_CMD_SAVEENV) && !defined(CONFIG_ENV_IS_NOWHERE)
> "env save - save environment\n"
> #endif
> +#if defined(CONFIG_CMD_NVEDIT_EFI)
> + "env set [-e | -f] name [arg ...]\n";
> +#else
> "env set [-f] name [arg ...]\n";
> #endif
> +#endif
>
> U_BOOT_CMD(
> env, CONFIG_SYS_MAXARGS, 1, do_env,
> @@ -1295,6 +1313,10 @@ U_BOOT_CMD_COMPLETE(
> printenv, CONFIG_SYS_MAXARGS, 1, do_env_print,
> "print environment variables",
> "[-a]\n - print [all] values of all environment variables\n"
> +#if defined(CONFIG_CMD_NVEDIT_EFI)
> + "printenv -e [<name> ...]\n"
> + " - print UEFI variable 'name' or all the variables\n"
> +#endif
> "printenv name ...\n"
> " - print value of environment variable 'name'",
> var_complete
> @@ -1322,7 +1344,11 @@ U_BOOT_CMD_COMPLETE(
> U_BOOT_CMD_COMPLETE(
> setenv, CONFIG_SYS_MAXARGS, 0, do_env_set,
> "set environment variables",
> - "[-f] name value ...\n"
> +#if defined(CONFIG_CMD_NVEDIT_EFI)
> + "-e <name> [<value> ...]\n"
> + " - set UEFI variable 'name' to 'value' ...'\n"
> +#endif
> + "setenv [-f] name value ...\n"
> " - [forcibly] set environment variable 'name' to 'value ...'\n"
> "setenv [-f] name\n"
> " - [forcibly] delete environment variable 'name'",
> diff --git a/cmd/nvedit_efi.c b/cmd/nvedit_efi.c
> new file mode 100644
> index 000000000000..58c92009e8db
> --- /dev/null
> +++ b/cmd/nvedit_efi.c
> @@ -0,0 +1,319 @@
> +// SPDX-License-Identifier: GPL-2.0+
> +/*
> + * Integrate UEFI variables to u-boot env interface
> + *
> + * Copyright (c) 2018 AKASHI Takahiro, Linaro Limited
> + */
> +
> +#include <charset.h>
> +#include <common.h>
> +#include <command.h>
> +#include <efi_loader.h>
> +#include <exports.h>
> +#include <hexdump.h>
> +#include <malloc.h>
> +#include <linux/kernel.h>
> +
> +static const struct {
> + u32 mask;
> + char *text;
> +} efi_var_attrs[] = {
> + {EFI_VARIABLE_NON_VOLATILE, "NV"},
> + {EFI_VARIABLE_BOOTSERVICE_ACCESS, "BS"},
> + {EFI_VARIABLE_RUNTIME_ACCESS, "RT"},
> + {EFI_VARIABLE_AUTHENTICATED_WRITE_ACCESS, "AW"},
> + {EFI_VARIABLE_TIME_BASED_AUTHENTICATED_WRITE_ACCESS, "AT"},
> +};
> +
> +static int print_variable_info(u16 *name, efi_guid_t *guid)
> +{
> + u32 attributes;
> + u8 *data;
> + efi_uintn_t size;
> + int count, i;
> + efi_status_t ret;
> +
> + data = NULL;
> + size = 0;
> + ret = efi_get_variable(name, guid, &attributes, &size, data);
> + if (ret == EFI_BUFFER_TOO_SMALL) {
> + data = malloc(size);
> + if (!data)
> + return -1;
Just goto out.
> +
> + ret = efi_get_variable(name, guid, &attributes, &size, data);
> + }
> + if (ret == EFI_NOT_FOUND) {
> + printf("Error: \"%ls\" not defined\n", name);
> + goto out;
> + }
> + if (ret != EFI_SUCCESS)
> + goto out;
> +
> + printf("%ls:", name);
> + for (count = 0, i = 0; i < ARRAY_SIZE(efi_var_attrs); i++)
> + if (attributes & efi_var_attrs[i].mask) {
> + if (count)
> + putc('|');
> + else
> + putc(' ');
> + count++;
> + puts(efi_var_attrs[i].text);
> + }
> + printf(", DataSize = 0x%lx\n", size);
> + print_hex_dump(" ", DUMP_PREFIX_OFFSET, 16, 1, data, size, true);
> +
> + return 0;
> +out:
> + free(data);
> + return -1;
> +}
> +
> +/*
> + * From efi_variable.c,
> + *
> + * Mapping between UEFI variables and u-boot variables:
> + *
> + * efi_$guid_$varname = {attributes}(type)value
> + */
> +static int efi_dump_var(cmd_tbl_t *cmdtp, int flag,
> + int argc, char * const argv[])
> +{
> + u16 *var_name16, *p;
> + efi_uintn_t buf_size, size;
> + efi_guid_t guid;
> + efi_status_t ret;
> +
> + buf_size = 128;
> + var_name16 = malloc(buf_size);
> + if (!var_name16)
> + return CMD_RET_FAILURE;
> +
> + if (argc > 1) {
Missing a comment on what this does. Also, I think it makes sense to
extract the 2 cases (dump 1 var, dump all vars) into separate functions.
They share almost no code and just make indentation hard.
> + argc--;
> + argv++;
> +
> + for (; argc > 0; argc--, argv++) {
> + size = (strlen(argv[0]) + 1) * 2;
(utf8_utf16_strlen() + 1) * sizeof(u16)?
> + if (buf_size < size) {
> + buf_size = size;
> + p = realloc(var_name16, buf_size);
> + if (!p) {
> + free(var_name16);
> + return CMD_RET_FAILURE;
> + }
> + var_name16 = p;
> + }
> +
> + p = var_name16;
> + utf8_utf16_strcpy(&p, argv[0]);
> + guid = efi_global_variable_guid;
Why do you need to copy the guid into a stack variable? Can't you just
pass the pointer?
> +
> + print_variable_info(var_name16, &guid);
Not checking return value?
> + }
> +
> + free(var_name16);
> +
> + return CMD_RET_SUCCESS;
> + }
> +
> + var_name16[0] = 0;
> + for (;;) {
> + size = buf_size;
> + ret = efi_get_next_variable_name(&size, var_name16, &guid);
> + if (ret == EFI_NOT_FOUND)
> + break;
> + if (ret == EFI_BUFFER_TOO_SMALL) {
> + buf_size = size;
> + p = realloc(var_name16, buf_size);
> + if (!p) {
> + free(var_name16);
> + return CMD_RET_FAILURE;
> + }
> + var_name16 = p;
> + ret = efi_get_next_variable_name(&size, var_name16,
> + &guid);
> + }
> + if (ret != EFI_SUCCESS) {
> + free(var_name16);
> + return CMD_RET_FAILURE;
> + }
> +
> + print_variable_info(var_name16, &guid);
Not checking return value?
Alex
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