#include <charset.h>
#include <efi_loader.h>
#include <hexdump.h>
+#include <environment.h>
+#include <search.h>
+#include <uuid.h>
#define READ_ONLY BIT(31)
if (ret)
return EFI_EXIT(ret);
- debug("%s: get '%s'\n", __func__, native_name);
+ EFI_PRINT("get '%s'\n", native_name);
val = env_get(native_name);
free(native_name);
len /= 2;
*data_size = len;
- if (in_size < len)
- return EFI_EXIT(EFI_BUFFER_TOO_SMALL);
+ if (in_size < len) {
+ ret = EFI_BUFFER_TOO_SMALL;
+ goto out;
+ }
if (!data)
return EFI_EXIT(EFI_INVALID_PARAMETER);
if (hex2bin(data, s, len))
return EFI_EXIT(EFI_DEVICE_ERROR);
- debug("%s: got value: \"%s\"\n", __func__, s);
+ EFI_PRINT("got value: \"%s\"\n", s);
} else if ((s = prefix(val, "(utf8)"))) {
unsigned len = strlen(s) + 1;
*data_size = len;
- if (in_size < len)
- return EFI_EXIT(EFI_BUFFER_TOO_SMALL);
+ if (in_size < len) {
+ ret = EFI_BUFFER_TOO_SMALL;
+ goto out;
+ }
if (!data)
return EFI_EXIT(EFI_INVALID_PARAMETER);
memcpy(data, s, len);
((char *)data)[len] = '\0';
- debug("%s: got value: \"%s\"\n", __func__, (char *)data);
+ EFI_PRINT("got value: \"%s\"\n", (char *)data);
} else {
- debug("%s: invalid value: '%s'\n", __func__, val);
+ EFI_PRINT("invalid value: '%s'\n", val);
return EFI_EXIT(EFI_DEVICE_ERROR);
}
+out:
if (attributes)
*attributes = attr & EFI_VARIABLE_MASK;
- return EFI_EXIT(EFI_SUCCESS);
+ return EFI_EXIT(ret);
+}
+
+static char *efi_variables_list;
+static char *efi_cur_variable;
+
+/**
+ * parse_uboot_variable() - parse a u-boot variable and get uefi-related
+ * information
+ * @variable: whole data of u-boot variable (ie. name=value)
+ * @variable_name_size: size of variable_name buffer in byte
+ * @variable_name: name of uefi variable in u16, null-terminated
+ * @vendor: vendor's guid
+ * @attributes: attributes
+ *
+ * A uefi variable is encoded into a u-boot variable as described above.
+ * This function parses such a u-boot variable and retrieve uefi-related
+ * information into respective parameters. In return, variable_name_size
+ * is the size of variable name including NULL.
+ *
+ * Return: EFI_SUCCESS if parsing is OK, EFI_NOT_FOUND when
+ the entire variable list has been returned,
+ otherwise non-zero status code
+ */
+static efi_status_t parse_uboot_variable(char *variable,
+ efi_uintn_t *variable_name_size,
+ u16 *variable_name,
+ const efi_guid_t *vendor,
+ u32 *attributes)
+{
+ char *guid, *name, *end, c;
+ unsigned long name_len;
+ u16 *p;
+
+ guid = strchr(variable, '_');
+ if (!guid)
+ return EFI_INVALID_PARAMETER;
+ guid++;
+ name = strchr(guid, '_');
+ if (!name)
+ return EFI_INVALID_PARAMETER;
+ name++;
+ end = strchr(name, '=');
+ if (!end)
+ return EFI_INVALID_PARAMETER;
+
+ name_len = end - name;
+ if (*variable_name_size < (name_len + 1)) {
+ *variable_name_size = name_len + 1;
+ return EFI_BUFFER_TOO_SMALL;
+ }
+ end++; /* point to value */
+
+ /* variable name */
+ p = variable_name;
+ utf8_utf16_strncpy(&p, name, name_len);
+ variable_name[name_len] = 0;
+ *variable_name_size = name_len + 1;
+
+ /* guid */
+ c = *(name - 1);
+ *(name - 1) = '\0'; /* guid need be null-terminated here */
+ uuid_str_to_bin(guid, (unsigned char *)vendor, UUID_STR_FORMAT_GUID);
+ *(name - 1) = c;
+
+ /* attributes */
+ parse_attr(end, attributes);
+
+ return EFI_SUCCESS;
}
/**
- * efi_efi_get_next_variable() - get next UEFI variable
+ * efi_get_next_variable_name() - enumerate the current variable names
+ * @variable_name_size: size of variable_name buffer in byte
+ * @variable_name: name of uefi variable's name in u16
+ * @vendor: vendor's guid
*
- * This function implements the GetNextVariable runtime service.
+ * This function implements the GetNextVariableName service.
*
* See the Unified Extensible Firmware Interface (UEFI) specification for
- * details.
+ * details: http://wiki.phoenix.com/wiki/index.php/
+ * EFI_RUNTIME_SERVICES#GetNextVariableName.28.29
*
- * @variable_name_size: on entry size of the buffer for the variable name, on
- * exit the length of the name of the next variable
- * @variable_name: on entry name of the current variable, on exit the name
- * of the next variable
- * @vendor: vendor GUID
- * Return: status code
+ * Return: status code
*/
efi_status_t EFIAPI efi_get_next_variable_name(efi_uintn_t *variable_name_size,
u16 *variable_name,
const efi_guid_t *vendor)
{
+ char *native_name, *variable;
+ ssize_t name_len, list_len;
+ char regex[256];
+ char * const regexlist[] = {regex};
+ u32 attributes;
+ int i;
+ efi_status_t ret;
+
EFI_ENTRY("%p \"%ls\" %pUl", variable_name_size, variable_name, vendor);
- return EFI_EXIT(EFI_DEVICE_ERROR);
+ if (!variable_name_size || !variable_name || !vendor)
+ return EFI_EXIT(EFI_INVALID_PARAMETER);
+
+ if (variable_name[0]) {
+ /* check null-terminated string */
+ for (i = 0; i < *variable_name_size; i++)
+ if (!variable_name[i])
+ break;
+ if (i >= *variable_name_size)
+ return EFI_EXIT(EFI_INVALID_PARAMETER);
+
+ /* search for the last-returned variable */
+ ret = efi_to_native(&native_name, variable_name, vendor);
+ if (ret)
+ return EFI_EXIT(ret);
+
+ name_len = strlen(native_name);
+ for (variable = efi_variables_list; variable && *variable;) {
+ if (!strncmp(variable, native_name, name_len) &&
+ variable[name_len] == '=')
+ break;
+
+ variable = strchr(variable, '\n');
+ if (variable)
+ variable++;
+ }
+
+ free(native_name);
+ if (!(variable && *variable))
+ return EFI_EXIT(EFI_INVALID_PARAMETER);
+
+ /* next variable */
+ variable = strchr(variable, '\n');
+ if (variable)
+ variable++;
+ if (!(variable && *variable))
+ return EFI_EXIT(EFI_NOT_FOUND);
+ } else {
+ /*
+ *new search: free a list used in the previous search
+ */
+ free(efi_variables_list);
+ efi_variables_list = NULL;
+ efi_cur_variable = NULL;
+
+ snprintf(regex, 256, "efi_.*-.*-.*-.*-.*_.*");
+ list_len = hexport_r(&env_htab, '\n',
+ H_MATCH_REGEX | H_MATCH_KEY,
+ &efi_variables_list, 0, 1, regexlist);
+ /* 1 indicates that no match was found */
+ if (list_len <= 1)
+ return EFI_EXIT(EFI_NOT_FOUND);
+
+ variable = efi_variables_list;
+ }
+
+ ret = parse_uboot_variable(variable, variable_name_size, variable_name,
+ vendor, &attributes);
+
+ return EFI_EXIT(ret);
}
/**
EFI_ENTRY("\"%ls\" %pUl %x %zu %p", variable_name, vendor, attributes,
data_size, data);
- if (!variable_name || !vendor) {
+ /* TODO: implement APPEND_WRITE */
+ if (!variable_name || !vendor ||
+ (attributes & EFI_VARIABLE_APPEND_WRITE)) {
ret = EFI_INVALID_PARAMETER;
goto out;
}
if (val) {
parse_attr(val, &attr);
+ /* We should not free val */
+ val = NULL;
if (attr & READ_ONLY) {
- /* We should not free val */
- val = NULL;
ret = EFI_WRITE_PROTECTED;
goto out;
}
+
+ /*
+ * attributes won't be changed
+ * TODO: take care of APPEND_WRITE once supported
+ */
+ if (attr != attributes) {
+ ret = EFI_INVALID_PARAMETER;
+ goto out;
+ }
}
val = malloc(2 * data_size + strlen("{ro,run,boot}(blob)") + 1);
s = bin2hex(s, data, data_size);
*s = '\0';
- debug("%s: setting: %s=%s\n", __func__, native_name, val);
+ EFI_PRINT("setting: %s=%s\n", native_name, val);
if (env_set(native_name, val))
ret = EFI_DEVICE_ERROR;
projects / oweals / u-boot.git / blobdiff