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efi_loader: add efi_dp_from_name()

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Factor out efi_set_bootdev() and extract efi_dp_from_name().
This function will be used to set a boot device in efishell command.

Signed-off-by: AKASHI Takahiro <takahiro.akashi@linaro.org>
Signed-off-by: Alexander Graf <agraf@suse.de>
This commit is contained in:
AKASHI Takahiro 2018-10-17 16:32:03 +09:00 • committed by Alexander Graf
parent b0c78d8ffc
commit f1589ffb33
3 changed files with 59 additions and 34 deletions
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42
cmd/bootefi.c
View file

@ -608,45 +608,19 @@ U_BOOT_CMD(
void efi_set_bootdev(const char *dev, const char *devnr, const char *path)
{
char filename[32] = { 0 }; /* dp->str is u16[32] long */
char *s;
struct efi_device_path *device, *image;
efi_status_t ret;
/* efi_set_bootdev is typically called repeatedly, recover memory */
efi_free_pool(bootefi_device_path);
efi_free_pool(bootefi_image_path);
/* If blk_get_device_part_str fails, avoid duplicate free. */
ret = efi_dp_from_name(dev, devnr, path, &device, &image);
if (ret == EFI_SUCCESS) {
bootefi_device_path = device;
bootefi_image_path = image;
} else {
bootefi_device_path = NULL;
bootefi_image_path = NULL;
if (strcmp(dev, "Net")) {
struct blk_desc *desc;
disk_partition_t fs_partition;
int part;
part = blk_get_device_part_str(dev, devnr, &desc, &fs_partition,
1);
if (part < 0)
return;
bootefi_device_path = efi_dp_from_part(desc, part);
} else {
#ifdef CONFIG_NET
bootefi_device_path = efi_dp_from_eth();
#endif
}
if (!path)
return;
if (strcmp(dev, "Net")) {
/* Add leading / to fs paths, because they're absolute */
snprintf(filename, sizeof(filename), "/%s", path);
} else {
snprintf(filename, sizeof(filename), "%s", path);
}
/* DOS style file path: */
s = filename;
while ((s = strchr(s, '/')))
*s++ = '\\';
bootefi_image_path = efi_dp_from_file(NULL, 0, filename);
}

4
include/efi_loader.h
View file

@ -432,6 +432,10 @@ const struct efi_device_path *efi_dp_last_node(
efi_status_t efi_dp_split_file_path(struct efi_device_path *full_path,
struct efi_device_path **device_path,
struct efi_device_path **file_path);
efi_status_t efi_dp_from_name(const char *dev, const char *devnr,
const char *path,
struct efi_device_path **device,
struct efi_device_path **file);
#define EFI_DP_TYPE(_dp, _type, _subtype) \
(((_dp)->type == DEVICE_PATH_TYPE_##_type) && \

47
lib/efi_loader/efi_device_path.c
View file

@ -941,3 +941,50 @@ efi_status_t efi_dp_split_file_path(struct efi_device_path *full_path,
*file_path = fp;
return EFI_SUCCESS;
}
efi_status_t efi_dp_from_name(const char *dev, const char *devnr,
const char *path,
struct efi_device_path **device,
struct efi_device_path **file)
{
int is_net;
struct blk_desc *desc = NULL;
disk_partition_t fs_partition;
int part = 0;
char filename[32] = { 0 }; /* dp->str is u16[32] long */
char *s;
if (!device || (path && !file))
return EFI_INVALID_PARAMETER;
is_net = !strcmp(dev, "Net");
if (!is_net) {
part = blk_get_device_part_str(dev, devnr, &desc, &fs_partition,
1);
if (part < 0)
return EFI_INVALID_PARAMETER;
*device = efi_dp_from_part(desc, part);
} else {
#ifdef CONFIG_NET
*device = efi_dp_from_eth();
#endif
}
if (!path)
return EFI_SUCCESS;
if (!is_net) {
/* Add leading / to fs paths, because they're absolute */
snprintf(filename, sizeof(filename), "/%s", path);
} else {
snprintf(filename, sizeof(filename), "%s", path);
}
/* DOS style file path: */
s = filename;
while ((s = strchr(s, '/')))
*s++ = '\\';
*file = efi_dp_from_file(NULL, 0, filename);
return EFI_SUCCESS;
}