Message ID | 20190201013155.16617-1-takahiro.akashi@linaro.org |
---|---|
State | Superseded, archived |
Delegated to: | Heinrich Schuchardt |
Headers | show |
Series | [U-Boot,v6.2] cmd: env: add "-e" option for handling UEFI variables | expand |
On 2/1/19 2:31 AM, AKASHI Takahiro wrote: > # This is a replacement of my patch#1[1] with minor updates to fix > # travis build errors. The other patches are the exact same as in v6. > # [1] https://lists.denx.de/pipermail/u-boot/2019-January/356035.html > > "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.akashi@linaro.org> Thanks for the patch. As long as we use U-Boot variables as backend for EFI variables this additional functionality is very helpful. How about adding a Python test (in a separate patch)? When resending, please, send the complete series marked as v7 or whatever is next. Please, provide a change log separated via --- from the commit message (so that it is not copied into the repository). > --- > MAINTAINERS | 1 + > cmd/Kconfig | 6 + > cmd/Makefile | 1 + > cmd/nvedit.c | 28 +++- > cmd/nvedit_efi.c | 340 ++++++++++++++++++++++++++++++++++++++++++++++ > include/command.h | 4 + > 6 files changed, 379 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..c66333598d31 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 > + imply HEXDUMP > + Please, add a descriptive text so that this configuration item become editable with 'make menuconfig'. > 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..07285b877f40 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_SPL_BUILD) && 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" There is a duplicate space before '-e'. > +#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"; => help env set env - environment handling commands Usage: <snip> env set [-e | -f] name [arg ...] This leaves the user without a clue what env set actually does and what -e is meant for. Please, add a bit more text. Wouldn't separate lines for 'set' with and without '-e' be more consistent with what you did for 'env print'? > +#else > "env set [-f] name [arg ...]\n"; Here too. > #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..08a7889139e6 > --- /dev/null > +++ b/cmd/nvedit_efi.c > @@ -0,0 +1,340 @@ > +// 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> > + > +/* > + * From efi_variable.c, > + * > + * Mapping between UEFI variables and u-boot variables: > + * > + * efi_$guid_$varname = {attributes}(type)value > + */ > + > +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"}, > +}; > + > +/* show information of named variable */ The comments for a function should look like shown below. This allows to use Sphinx to generate a html documentation page. I prefer to add descriptions to all functions. /** * print_variable_info() - show information about a variable * * @name: name of the variable * @guid: vendor GUID */ > +static void 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) > + 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%zx\n", size); > + print_hex_dump(" ", DUMP_PREFIX_OFFSET, 16, 1, data, size, true); > + > + return; > +out: > + free(data); > +} > + > +static int efi_dump_var_ones(int argc, char * const argv[]) The naming of this function sounds strange. How about efi_dump_single_var() or just efi_dump_var()? > +{ > + u16 *var_name16, *p; > + efi_uintn_t buf_size, size; > + > + buf_size = 128; > + var_name16 = malloc(buf_size); > + if (!var_name16) > + return CMD_RET_FAILURE; > + > + for (; argc > 0; argc--, argv++) { > + size = (utf8_utf16_strlen(argv[0]) + 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]); > + > + print_variable_info(var_name16, > + (efi_guid_t *)&efi_global_variable_guid); > + } > + > + free(var_name16); > + > + return CMD_RET_SUCCESS; > +} > + > +static int efi_dump_var_all(void) > +{ > + 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; > + > + 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); > + } > + > + free(var_name16); > + > + return CMD_RET_SUCCESS; > +} > + > +static int efi_dump_var(cmd_tbl_t *cmdtp, int flag, > + int argc, char * const argv[]) > +{ > + if (argc > 1) > + /* show specified UEFI variables */ > + return efi_dump_var_ones(--argc, ++argv); > + > + /* enumerate and show all UEFI variables */ > + return efi_dump_var_all(); > +} > + > +int do_env_print_efi(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[]) > +{ > + efi_status_t r; > + > + /* Initialize EFI drivers */ > + r = efi_init_obj_list(); > + if (r != EFI_SUCCESS) { > + printf("Error: Cannot initialize UEFI sub-system, r = %lu\n", > + r & ~EFI_ERROR_MASK); > + return CMD_RET_FAILURE; > + } > + > + return efi_dump_var(cmdtp, flag, argc, argv); > +} > + > +/* > + * Interpret a given data string and append it to buffer. > + * Buffer will be realloc'ed if necessary. > + */ Please, use Sphinx style comment: /** * append_value() - append data string to buffer * * Interpret a given data string and append it to buffer. * Buffer will be realloc'ed if necessary. * * @bufp: pointer to pointer to buffer * @sizep: pointer to size of buffer * (updated if buffer is reallocated) * @data: data to be interpreted and appended * Return: 0 on success */ > +static int append_value(char **bufp, size_t *sizep, char *data) > +{ > + char *tmp_buf = NULL, *new_buf = NULL, *value; > + unsigned long len = 0; > + > + if (!strncmp(data, "=0x", 2)) { /* hexadecimal number */ > + union { > + u8 u8; > + u16 u16; > + u32 u32; > + u64 u64; > + } tmp_data; > + unsigned long hex_value; > + void *hex_ptr; > + > + data += 3; > + len = strlen(data); > + if ((len & 0x1)) /* not multiple of two */ > + return -1; > + > + len /= 2; > + if (len > 8) > + return -1; > + else if (len > 4) > + len = 8; > + else if (len > 2) > + len = 4; > + > + /* convert hex hexadecimal number */ > + if (strict_strtoul(data, 16, &hex_value) < 0) > + return -1; > + > + tmp_buf = malloc(len); > + if (!tmp_buf) > + return -1; > + > + if (len == 1) { > + tmp_data.u8 = hex_value; > + hex_ptr = &tmp_data.u8; > + } else if (len == 2) { > + tmp_data.u16 = hex_value; > + hex_ptr = &tmp_data.u16; > + } else if (len == 4) { > + tmp_data.u32 = hex_value; > + hex_ptr = &tmp_data.u32; > + } else { > + tmp_data.u64 = hex_value; > + hex_ptr = &tmp_data.u64; > + } > + memcpy(tmp_buf, hex_ptr, len); > + value = tmp_buf; > + > + } else if (!strncmp(data, "=H", 2)) { /* hexadecimal-byte array */ > + data += 2; > + len = strlen(data); > + if (len & 0x1) /* not multiple of two */ > + return -1; > + > + len /= 2; > + tmp_buf = malloc(len); > + if (!tmp_buf) > + return -1; > + > + if (hex2bin((u8 *)tmp_buf, data, len) < 0) > + return -1; > + > + value = tmp_buf; > + } else { /* string */ > + if (!strncmp(data, "=\"", 2) || !strncmp(data, "=S\"", 3)) { > + if (data[1] == '"') > + data += 2; > + else > + data += 3; > + value = data; > + len = strlen(data) - 1; > + if (data[len] != '"') > + return -1; > + } else { > + value = data; > + len = strlen(data); > + } > + } > + > + new_buf = realloc(*bufp, *sizep + len); > + if (!new_buf) > + goto out; > + > + memcpy(new_buf + *sizep, value, len); > + *bufp = new_buf; > + *sizep += len; > + > +out: > + free(tmp_buf); > + > + return 0; > +} > + > +static int efi_set_var(cmd_tbl_t *cmdtp, int flag, > + int argc, char * const argv[]) > +{ > + char *var_name, *value = NULL; > + efi_uintn_t size = 0; > + u16 *var_name16 = NULL, *p; > + efi_guid_t guid; > + efi_status_t ret; > + > + if (argc == 1) > + return CMD_RET_SUCCESS; > + > + var_name = argv[1]; > + if (argc == 2) { > + /* remove */ > + value = NULL; > + size = 0; > + } else { /* set */ > + argc -= 2; > + argv += 2; > + > + for ( ; argc > 0; argc--, argv++) > + if (append_value(&value, &size, argv[0]) < 0) { > + ret = CMD_RET_FAILURE; > + goto out; > + } > + } > + > + var_name16 = malloc((strlen(var_name) + 1) * 2); Please, always check the return value of malloc(). strlen() is the wrong function here. Use utf8_utf16_strlen() to match the copy function below. > + p = var_name16; > + utf8_utf16_strncpy(&p, var_name, strlen(var_name) + 1); Don't you trust your malloc() call? Wouldn't you use utf8_utf16_strcpy()? Best regards Heinrich > + > + guid = efi_global_variable_guid; > + ret = efi_set_variable(var_name16, &guid, > + EFI_VARIABLE_BOOTSERVICE_ACCESS | > + EFI_VARIABLE_RUNTIME_ACCESS, size, value); > + ret = (ret == EFI_SUCCESS ? CMD_RET_SUCCESS : CMD_RET_FAILURE); > +out: > + free(value); > + free(var_name16); > + > + return ret; > +} > + > +int do_env_set_efi(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[]) > +{ > + efi_status_t r; > + > + /* Initialize EFI drivers */ > + r = efi_init_obj_list(); > + if (r != EFI_SUCCESS) { > + printf("Error: Cannot initialize UEFI sub-system, r = %lu\n", > + r & ~EFI_ERROR_MASK); > + return CMD_RET_FAILURE; > + } > + > + return efi_set_var(cmdtp, flag, argc, argv); > +} > diff --git a/include/command.h b/include/command.h > index feddef300ccc..efc4dfc457c1 100644 > --- a/include/command.h > +++ b/include/command.h > @@ -51,6 +51,10 @@ extern int do_run(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[]); > #if defined(CONFIG_CMD_BOOTEFI) > extern int do_bootefi_run(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[]); > #endif > +#if defined(CONFIG_CMD_NVEDIT_EFI) > +int do_env_print_efi(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[]); > +int do_env_set_efi(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[]); > +#endif > > /* common/command.c */ > int _do_help (cmd_tbl_t *cmd_start, int cmd_items, cmd_tbl_t * cmdtp, int >
On Tue, Feb 19, 2019 at 07:58:29PM +0100, Heinrich Schuchardt wrote: > On 2/1/19 2:31 AM, AKASHI Takahiro wrote: > > # This is a replacement of my patch#1[1] with minor updates to fix > > # travis build errors. The other patches are the exact same as in v6. > > # [1] https://lists.denx.de/pipermail/u-boot/2019-January/356035.html > > > > "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.akashi@linaro.org> > > Thanks for the patch. As long as we use U-Boot variables as backend for > EFI variables this additional functionality is very helpful. > > How about adding a Python test (in a separate patch)? Yes, I will when I have time. > When resending, please, send the complete series marked as v7 or > whatever is next. The reason why I didn't do so is that I haven't had any reviews on the rest of the patches. In addition, patch#1 can be applied on its own since v6. > Please, provide a change log separated via > --- > from the commit message (so that it is not copied into the repository). Normally if I want to add a change log, I will create a cover letter even there is only one patch file. > > > --- > > MAINTAINERS | 1 + > > cmd/Kconfig | 6 + > > cmd/Makefile | 1 + > > cmd/nvedit.c | 28 +++- > > cmd/nvedit_efi.c | 340 ++++++++++++++++++++++++++++++++++++++++++++++ > > include/command.h | 4 + > > 6 files changed, 379 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..c66333598d31 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 > > + imply HEXDUMP > > + > > Please, add a descriptive text so that this configuration item become > editable with 'make menuconfig'. I don't really think it is necessary, but I will do so. > > 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..07285b877f40 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_SPL_BUILD) && 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" > > There is a duplicate space before '-e'. Fill fix. > > +#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"; > > => help env set > env - environment handling commands > > Usage: > <snip> > env set [-e | -f] name [arg ...] > > This leaves the user without a clue what env set actually does and what > -e is meant for. Well, it is also the case for [-f]. > Please, add a bit more text. > > Wouldn't separate lines for 'set' with and without '-e' be more > consistent with what you did for 'env print'? > > > +#else > > "env set [-f] name [arg ...]\n"; So I will add a separate help line for clarification: "env set -e name [arg ...] - set UEFI variable\n" > Here too. > > > #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..08a7889139e6 > > --- /dev/null > > +++ b/cmd/nvedit_efi.c > > @@ -0,0 +1,340 @@ > > +// 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> > > + > > +/* > > + * From efi_variable.c, > > + * > > + * Mapping between UEFI variables and u-boot variables: > > + * > > + * efi_$guid_$varname = {attributes}(type)value > > + */ > > + > > +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"}, > > +}; > > + > > +/* show information of named variable */ > > The comments for a function should look like shown below. This allows to > use Sphinx to generate a html documentation page. I prefer to add > descriptions to all functions. Okay, but really "all?" > /** > * print_variable_info() - show information about a variable > * > * @name: name of the variable > * @guid: vendor GUID > */ I'm really confused with the format of description. There are several different styles of syntax seen across the tree. See my comment below. > > +static void 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) > > + 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%zx\n", size); > > + print_hex_dump(" ", DUMP_PREFIX_OFFSET, 16, 1, data, size, true); > > + > > + return; > > +out: > > + free(data); > > +} > > + > > +static int efi_dump_var_ones(int argc, char * const argv[]) > > The naming of this function sounds strange. How about > efi_dump_single_var() or just efi_dump_var()? Okay. > > +{ > > + u16 *var_name16, *p; > > + efi_uintn_t buf_size, size; > > + > > + buf_size = 128; > > + var_name16 = malloc(buf_size); > > + if (!var_name16) > > + return CMD_RET_FAILURE; > > + > > + for (; argc > 0; argc--, argv++) { > > + size = (utf8_utf16_strlen(argv[0]) + 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]); > > + > > + print_variable_info(var_name16, > > + (efi_guid_t *)&efi_global_variable_guid); > > + } > > + > > + free(var_name16); > > + > > + return CMD_RET_SUCCESS; > > +} > > + > > +static int efi_dump_var_all(void) > > +{ > > + 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; > > + > > + 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); > > + } > > + > > + free(var_name16); > > + > > + return CMD_RET_SUCCESS; > > +} > > + > > +static int efi_dump_var(cmd_tbl_t *cmdtp, int flag, > > + int argc, char * const argv[]) > > +{ > > + if (argc > 1) > > + /* show specified UEFI variables */ > > + return efi_dump_var_ones(--argc, ++argv); > > + > > + /* enumerate and show all UEFI variables */ > > + return efi_dump_var_all(); > > +} > > + > > +int do_env_print_efi(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[]) > > +{ > > + efi_status_t r; > > + > > + /* Initialize EFI drivers */ > > + r = efi_init_obj_list(); > > + if (r != EFI_SUCCESS) { > > + printf("Error: Cannot initialize UEFI sub-system, r = %lu\n", > > + r & ~EFI_ERROR_MASK); > > + return CMD_RET_FAILURE; > > + } > > + > > + return efi_dump_var(cmdtp, flag, argc, argv); > > +} > > + > > +/* > > + * Interpret a given data string and append it to buffer. > > + * Buffer will be realloc'ed if necessary. > > + */ > > Please, use Sphinx style comment: > > /** > * append_value() - append data string to buffer > * > * Interpret a given data string and append it to buffer. > * Buffer will be realloc'ed if necessary. For example, the function description should be placed between "@data" and "Return:"? > * @bufp: pointer to pointer to buffer > * @sizep: pointer to size of buffer > * (updated if buffer is reallocated) > * @data: data to be interpreted and appended > * Return: 0 on success Some people writes "@return(:)". Some people have nothing about return value. > */ > > +static int append_value(char **bufp, size_t *sizep, char *data) > > +{ > > + char *tmp_buf = NULL, *new_buf = NULL, *value; > > + unsigned long len = 0; > > + > > + if (!strncmp(data, "=0x", 2)) { /* hexadecimal number */ > > + union { > > + u8 u8; > > + u16 u16; > > + u32 u32; > > + u64 u64; > > + } tmp_data; > > + unsigned long hex_value; > > + void *hex_ptr; > > + > > + data += 3; > > + len = strlen(data); > > + if ((len & 0x1)) /* not multiple of two */ > > + return -1; > > + > > + len /= 2; > > + if (len > 8) > > + return -1; > > + else if (len > 4) > > + len = 8; > > + else if (len > 2) > > + len = 4; > > + > > + /* convert hex hexadecimal number */ > > + if (strict_strtoul(data, 16, &hex_value) < 0) > > + return -1; > > + > > + tmp_buf = malloc(len); > > + if (!tmp_buf) > > + return -1; > > + > > + if (len == 1) { > > + tmp_data.u8 = hex_value; > > + hex_ptr = &tmp_data.u8; > > + } else if (len == 2) { > > + tmp_data.u16 = hex_value; > > + hex_ptr = &tmp_data.u16; > > + } else if (len == 4) { > > + tmp_data.u32 = hex_value; > > + hex_ptr = &tmp_data.u32; > > + } else { > > + tmp_data.u64 = hex_value; > > + hex_ptr = &tmp_data.u64; > > + } > > + memcpy(tmp_buf, hex_ptr, len); > > + value = tmp_buf; > > + > > + } else if (!strncmp(data, "=H", 2)) { /* hexadecimal-byte array */ > > + data += 2; > > + len = strlen(data); > > + if (len & 0x1) /* not multiple of two */ > > + return -1; > > + > > + len /= 2; > > + tmp_buf = malloc(len); > > + if (!tmp_buf) > > + return -1; > > + > > + if (hex2bin((u8 *)tmp_buf, data, len) < 0) > > + return -1; > > + > > + value = tmp_buf; > > + } else { /* string */ > > + if (!strncmp(data, "=\"", 2) || !strncmp(data, "=S\"", 3)) { > > + if (data[1] == '"') > > + data += 2; > > + else > > + data += 3; > > + value = data; > > + len = strlen(data) - 1; > > + if (data[len] != '"') > > + return -1; > > + } else { > > + value = data; > > + len = strlen(data); > > + } > > + } > > + > > + new_buf = realloc(*bufp, *sizep + len); > > + if (!new_buf) > > + goto out; > > + > > + memcpy(new_buf + *sizep, value, len); > > + *bufp = new_buf; > > + *sizep += len; > > + > > +out: > > + free(tmp_buf); > > + > > + return 0; > > +} > > + > > +static int efi_set_var(cmd_tbl_t *cmdtp, int flag, > > + int argc, char * const argv[]) > > +{ > > + char *var_name, *value = NULL; > > + efi_uintn_t size = 0; > > + u16 *var_name16 = NULL, *p; > > + efi_guid_t guid; > > + efi_status_t ret; > > + > > + if (argc == 1) > > + return CMD_RET_SUCCESS; > > + > > + var_name = argv[1]; > > + if (argc == 2) { > > + /* remove */ > > + value = NULL; > > + size = 0; > > + } else { /* set */ > > + argc -= 2; > > + argv += 2; > > + > > + for ( ; argc > 0; argc--, argv++) > > + if (append_value(&value, &size, argv[0]) < 0) { > > + ret = CMD_RET_FAILURE; > > + goto out; > > + } > > + } > > + > > + var_name16 = malloc((strlen(var_name) + 1) * 2); > > Please, always check the return value of malloc(). Okay. > strlen() is the wrong function here. Use utf8_utf16_strlen() to match > the copy function below. Okay. > > + p = var_name16; > > + utf8_utf16_strncpy(&p, var_name, strlen(var_name) + 1); > > Don't you trust your malloc() call? > Wouldn't you use utf8_utf16_strcpy()? utf8_utf16_strcpy() doesn't exist now. utf8_utf16_strncpy() does. Thanks, -Takahiro Akashi > Best regards > > Heinrich > > > + > > + guid = efi_global_variable_guid; > > + ret = efi_set_variable(var_name16, &guid, > > + EFI_VARIABLE_BOOTSERVICE_ACCESS | > > + EFI_VARIABLE_RUNTIME_ACCESS, size, value); > > + ret = (ret == EFI_SUCCESS ? CMD_RET_SUCCESS : CMD_RET_FAILURE); > > +out: > > + free(value); > > + free(var_name16); > > + > > + return ret; > > +} > > + > > +int do_env_set_efi(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[]) > > +{ > > + efi_status_t r; > > + > > + /* Initialize EFI drivers */ > > + r = efi_init_obj_list(); > > + if (r != EFI_SUCCESS) { > > + printf("Error: Cannot initialize UEFI sub-system, r = %lu\n", > > + r & ~EFI_ERROR_MASK); > > + return CMD_RET_FAILURE; > > + } > > + > > + return efi_set_var(cmdtp, flag, argc, argv); > > +} > > diff --git a/include/command.h b/include/command.h > > index feddef300ccc..efc4dfc457c1 100644 > > --- a/include/command.h > > +++ b/include/command.h > > @@ -51,6 +51,10 @@ extern int do_run(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[]); > > #if defined(CONFIG_CMD_BOOTEFI) > > extern int do_bootefi_run(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[]); > > #endif > > +#if defined(CONFIG_CMD_NVEDIT_EFI) > > +int do_env_print_efi(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[]); > > +int do_env_set_efi(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[]); > > +#endif > > > > /* common/command.c */ > > int _do_help (cmd_tbl_t *cmd_start, int cmd_items, cmd_tbl_t * cmdtp, int > > >
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..c66333598d31 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 + 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..07285b877f40 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_SPL_BUILD) && 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..08a7889139e6 --- /dev/null +++ b/cmd/nvedit_efi.c @@ -0,0 +1,340 @@ +// 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> + +/* + * From efi_variable.c, + * + * Mapping between UEFI variables and u-boot variables: + * + * efi_$guid_$varname = {attributes}(type)value + */ + +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"}, +}; + +/* show information of named variable */ +static void 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) + 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%zx\n", size); + print_hex_dump(" ", DUMP_PREFIX_OFFSET, 16, 1, data, size, true); + + return; +out: + free(data); +} + +static int efi_dump_var_ones(int argc, char * const argv[]) +{ + u16 *var_name16, *p; + efi_uintn_t buf_size, size; + + buf_size = 128; + var_name16 = malloc(buf_size); + if (!var_name16) + return CMD_RET_FAILURE; + + for (; argc > 0; argc--, argv++) { + size = (utf8_utf16_strlen(argv[0]) + 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]); + + print_variable_info(var_name16, + (efi_guid_t *)&efi_global_variable_guid); + } + + free(var_name16); + + return CMD_RET_SUCCESS; +} + +static int efi_dump_var_all(void) +{ + 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; + + 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); + } + + free(var_name16); + + return CMD_RET_SUCCESS; +} + +static int efi_dump_var(cmd_tbl_t *cmdtp, int flag, + int argc, char * const argv[]) +{ + if (argc > 1) + /* show specified UEFI variables */ + return efi_dump_var_ones(--argc, ++argv); + + /* enumerate and show all UEFI variables */ + return efi_dump_var_all(); +} + +int do_env_print_efi(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[]) +{ + efi_status_t r; + + /* Initialize EFI drivers */ + r = efi_init_obj_list(); + if (r != EFI_SUCCESS) { + printf("Error: Cannot initialize UEFI sub-system, r = %lu\n", + r & ~EFI_ERROR_MASK); + return CMD_RET_FAILURE; + } + + return efi_dump_var(cmdtp, flag, argc, argv); +} + +/* + * Interpret a given data string and append it to buffer. + * Buffer will be realloc'ed if necessary. + */ +static int append_value(char **bufp, size_t *sizep, char *data) +{ + char *tmp_buf = NULL, *new_buf = NULL, *value; + unsigned long len = 0; + + if (!strncmp(data, "=0x", 2)) { /* hexadecimal number */ + union { + u8 u8; + u16 u16; + u32 u32; + u64 u64; + } tmp_data; + unsigned long hex_value; + void *hex_ptr; + + data += 3; + len = strlen(data); + if ((len & 0x1)) /* not multiple of two */ + return -1; + + len /= 2; + if (len > 8) + return -1; + else if (len > 4) + len = 8; + else if (len > 2) + len = 4; + + /* convert hex hexadecimal number */ + if (strict_strtoul(data, 16, &hex_value) < 0) + return -1; + + tmp_buf = malloc(len); + if (!tmp_buf) + return -1; + + if (len == 1) { + tmp_data.u8 = hex_value; + hex_ptr = &tmp_data.u8; + } else if (len == 2) { + tmp_data.u16 = hex_value; + hex_ptr = &tmp_data.u16; + } else if (len == 4) { + tmp_data.u32 = hex_value; + hex_ptr = &tmp_data.u32; + } else { + tmp_data.u64 = hex_value; + hex_ptr = &tmp_data.u64; + } + memcpy(tmp_buf, hex_ptr, len); + value = tmp_buf; + + } else if (!strncmp(data, "=H", 2)) { /* hexadecimal-byte array */ + data += 2; + len = strlen(data); + if (len & 0x1) /* not multiple of two */ + return -1; + + len /= 2; + tmp_buf = malloc(len); + if (!tmp_buf) + return -1; + + if (hex2bin((u8 *)tmp_buf, data, len) < 0) + return -1; + + value = tmp_buf; + } else { /* string */ + if (!strncmp(data, "=\"", 2) || !strncmp(data, "=S\"", 3)) { + if (data[1] == '"') + data += 2; + else + data += 3; + value = data; + len = strlen(data) - 1; + if (data[len] != '"') + return -1; + } else { + value = data; + len = strlen(data); + } + } + + new_buf = realloc(*bufp, *sizep + len); + if (!new_buf) + goto out; + + memcpy(new_buf + *sizep, value, len); + *bufp = new_buf; + *sizep += len; + +out: + free(tmp_buf); + + return 0; +} + +static int efi_set_var(cmd_tbl_t *cmdtp, int flag, + int argc, char * const argv[]) +{ + char *var_name, *value = NULL; + efi_uintn_t size = 0; + u16 *var_name16 = NULL, *p; + efi_guid_t guid; + efi_status_t ret; + + if (argc == 1) + return CMD_RET_SUCCESS; + + var_name = argv[1]; + if (argc == 2) { + /* remove */ + value = NULL; + size = 0; + } else { /* set */ + argc -= 2; + argv += 2; + + for ( ; argc > 0; argc--, argv++) + if (append_value(&value, &size, argv[0]) < 0) { + ret = CMD_RET_FAILURE; + goto out; + } + } + + var_name16 = malloc((strlen(var_name) + 1) * 2); + p = var_name16; + utf8_utf16_strncpy(&p, var_name, strlen(var_name) + 1); + + guid = efi_global_variable_guid; + ret = efi_set_variable(var_name16, &guid, + EFI_VARIABLE_BOOTSERVICE_ACCESS | + EFI_VARIABLE_RUNTIME_ACCESS, size, value); + ret = (ret == EFI_SUCCESS ? CMD_RET_SUCCESS : CMD_RET_FAILURE); +out: + free(value); + free(var_name16); + + return ret; +} + +int do_env_set_efi(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[]) +{ + efi_status_t r; + + /* Initialize EFI drivers */ + r = efi_init_obj_list(); + if (r != EFI_SUCCESS) { + printf("Error: Cannot initialize UEFI sub-system, r = %lu\n", + r & ~EFI_ERROR_MASK); + return CMD_RET_FAILURE; + } + + return efi_set_var(cmdtp, flag, argc, argv); +} diff --git a/include/command.h b/include/command.h index feddef300ccc..efc4dfc457c1 100644 --- a/include/command.h +++ b/include/command.h @@ -51,6 +51,10 @@ extern int do_run(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[]); #if defined(CONFIG_CMD_BOOTEFI) extern int do_bootefi_run(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[]); #endif +#if defined(CONFIG_CMD_NVEDIT_EFI) +int do_env_print_efi(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[]); +int do_env_set_efi(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[]); +#endif /* common/command.c */ int _do_help (cmd_tbl_t *cmd_start, int cmd_items, cmd_tbl_t * cmdtp, int
# This is a replacement of my patch#1[1] with minor updates to fix # travis build errors. The other patches are the exact same as in v6. # [1] https://lists.denx.de/pipermail/u-boot/2019-January/356035.html "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.akashi@linaro.org> --- MAINTAINERS | 1 + cmd/Kconfig | 6 + cmd/Makefile | 1 + cmd/nvedit.c | 28 +++- cmd/nvedit_efi.c | 340 ++++++++++++++++++++++++++++++++++++++++++++++ include/command.h | 4 + 6 files changed, 379 insertions(+), 1 deletion(-) create mode 100644 cmd/nvedit_efi.c