[PATCH v3 2/3] efi_loader: auto-generate boot option for each blkio device
Masahisa Kojima
masahisa.kojima at linaro.org
Fri Jan 12 01:19:22 CET 2024
Current efibootmgr auto-generates the boot option for all
disks and partitions installing EFI_SIMPLE_FILE_SYSTEM_PROTOCOL,
while EDK II reference implementation auto-generates the boot option
for all devices installing EFI_BLOCK_IO_PROTOCOL with
eliminating logical partitions.
This commit modifies the efibootmgr to get aligned to EDK II.
Signed-off-by: Masahisa Kojima <masahisa.kojima at linaro.org>
---
lib/efi_loader/efi_bootmgr.c | 101 ++++++++++++++++++++++++++---------
1 file changed, 75 insertions(+), 26 deletions(-)
diff --git a/lib/efi_loader/efi_bootmgr.c b/lib/efi_loader/efi_bootmgr.c
index eda2619142..c2b8da89e6 100644
--- a/lib/efi_loader/efi_bootmgr.c
+++ b/lib/efi_loader/efi_bootmgr.c
@@ -559,6 +559,50 @@ err:
return ret;
}
+/**
+ * try_load_from_media() - load file from media
+ *
+ * @file_path: file path
+ * @handle_img: on return handle for the newly installed image
+ *
+ * If @file_path contains a file name, load the file.
+ * If @file_path does not have a file name, search the architecture-specific
+ * default file and load it.
+ * TODO: If the FilePathList[0] device does not support
+ * EFI_SIMPLE_FILE_SYSTEM_PROTOCOL but supports EFI_BLOCK_IO_PROTOCOL,
+ * call EFI_BOOT_SERVICES.ConnectController()
+ * TODO: FilePathList[0] device supports EFI_SIMPLE_FILE_SYSTEM_PROTOCOL
+ * not based on EFI_BLOCK_IO_PROTOCOL
+ *
+ * Return: status code
+ */
+static efi_status_t try_load_from_media(struct efi_device_path *file_path,
+ efi_handle_t *handle_img)
+{
+ efi_handle_t handle_blkdev;
+ efi_status_t ret = EFI_SUCCESS;
+ struct efi_device_path *rem, *dp = NULL;
+ struct efi_device_path *final_dp = file_path;
+
+ handle_blkdev = efi_dp_find_obj(file_path, &efi_block_io_guid, &rem);
+ if (handle_blkdev) {
+ if (rem->type == DEVICE_PATH_TYPE_END) {
+ /* no file name present, try default file */
+ ret = fill_default_file_path(handle_blkdev->dev, &dp);
+ if (ret != EFI_SUCCESS)
+ return ret;
+
+ final_dp = dp;
+ }
+ }
+
+ ret = EFI_CALL(efi_load_image(true, efi_root, final_dp, NULL, 0, handle_img));
+
+ efi_free_pool(dp);
+
+ return ret;
+}
+
/**
* try_load_entry() - try to load image for boot option
*
@@ -593,7 +637,6 @@ static efi_status_t try_load_entry(u16 n, efi_handle_t *handle,
}
if (lo.attributes & LOAD_OPTION_ACTIVE) {
- struct efi_device_path *file_path;
u32 attributes;
log_debug("trying to load \"%ls\" from %pD\n", lo.label,
@@ -610,10 +653,7 @@ static efi_status_t try_load_entry(u16 n, efi_handle_t *handle,
else
ret = EFI_LOAD_ERROR;
} else {
- file_path = expand_media_path(lo.file_path);
- ret = EFI_CALL(efi_load_image(true, efi_root, file_path,
- NULL, 0, handle));
- efi_free_pool(file_path);
+ ret = try_load_from_media(lo.file_path, handle);
}
if (ret != EFI_SUCCESS) {
log_warning("Loading %ls '%ls' failed\n",
@@ -744,22 +784,23 @@ error:
}
/**
- * efi_bootmgr_enumerate_boot_option() - enumerate the possible bootable media
+ * efi_bootmgr_enumerate_boot_options() - enumerate the possible bootable media
*
* @opt: pointer to the media boot option structure
- * @volume_handles: pointer to the efi handles
- * @count: number of efi handle
+ * @handles: pointer to block device handles
+ * @count: On entry number of handles to block devices.
+ * On exit number of boot options.
* Return: status code
*/
-static efi_status_t efi_bootmgr_enumerate_boot_option(struct eficonfig_media_boot_option *opt,
- efi_handle_t *volume_handles,
- efi_status_t count)
+static efi_status_t
+efi_bootmgr_enumerate_boot_options(struct eficonfig_media_boot_option *opt,
+ efi_handle_t *handles, efi_uintn_t *count)
{
- u32 i;
+ u32 i, num = 0;
struct efi_handler *handler;
efi_status_t ret = EFI_SUCCESS;
- for (i = 0; i < count; i++) {
+ for (i = 0; i < *count; i++) {
u16 *p;
u16 dev_name[BOOTMENU_DEVICE_NAME_MAX];
char *optional_data;
@@ -767,8 +808,15 @@ static efi_status_t efi_bootmgr_enumerate_boot_option(struct eficonfig_media_boo
char buf[BOOTMENU_DEVICE_NAME_MAX];
struct efi_device_path *device_path;
struct efi_device_path *short_dp;
+ struct efi_block_io *blkio;
+
+ ret = efi_search_protocol(handles[i], &efi_block_io_guid, &handler);
+ blkio = handler->protocol_interface;
- ret = efi_search_protocol(volume_handles[i], &efi_guid_device_path, &handler);
+ if (blkio->media->logical_partition)
+ continue;
+
+ ret = efi_search_protocol(handles[i], &efi_guid_device_path, &handler);
if (ret != EFI_SUCCESS)
continue;
ret = efi_protocol_open(handler, (void **)&device_path,
@@ -776,7 +824,7 @@ static efi_status_t efi_bootmgr_enumerate_boot_option(struct eficonfig_media_boo
if (ret != EFI_SUCCESS)
continue;
- ret = efi_disk_get_device_name(volume_handles[i], buf, BOOTMENU_DEVICE_NAME_MAX);
+ ret = efi_disk_get_device_name(handles[i], buf, BOOTMENU_DEVICE_NAME_MAX);
if (ret != EFI_SUCCESS)
continue;
@@ -800,17 +848,20 @@ static efi_status_t efi_bootmgr_enumerate_boot_option(struct eficonfig_media_boo
* to store guid, instead of realloc the load_option.
*/
lo.optional_data = "1234567";
- opt[i].size = efi_serialize_load_option(&lo, (u8 **)&opt[i].lo);
- if (!opt[i].size) {
+ opt[num].size = efi_serialize_load_option(&lo, (u8 **)&opt[num].lo);
+ if (!opt[num].size) {
ret = EFI_OUT_OF_RESOURCES;
goto out;
}
/* set the guid */
- optional_data = (char *)opt[i].lo + (opt[i].size - u16_strsize(u"1234567"));
+ optional_data = (char *)opt[num].lo + (opt[num].size - u16_strsize(u"1234567"));
memcpy(optional_data, &efi_guid_bootmenu_auto_generated, sizeof(efi_guid_t));
+ num++;
}
out:
+ *count = num;
+
return ret;
}
@@ -1039,8 +1090,7 @@ efi_status_t efi_bootmgr_delete_boot_option(u16 boot_index)
/**
* efi_bootmgr_update_media_device_boot_option() - generate the media device boot option
*
- * This function enumerates all devices supporting EFI_SIMPLE_FILE_SYSTEM_PROTOCOL
- * and generate the bootmenu entries.
+ * This function enumerates all BlockIo devices and add the boot option for it.
* This function also provide the BOOT#### variable maintenance for
* the media device entries.
* - Automatically create the BOOT#### variable for the newly detected device,
@@ -1056,13 +1106,13 @@ efi_status_t efi_bootmgr_update_media_device_boot_option(void)
u32 i;
efi_status_t ret;
efi_uintn_t count;
- efi_handle_t *volume_handles = NULL;
+ efi_handle_t *handles = NULL;
struct eficonfig_media_boot_option *opt = NULL;
ret = efi_locate_handle_buffer_int(BY_PROTOCOL,
- &efi_simple_file_system_protocol_guid,
+ &efi_block_io_guid,
NULL, &count,
- (efi_handle_t **)&volume_handles);
+ (efi_handle_t **)&handles);
if (ret != EFI_SUCCESS)
goto out;
@@ -1072,8 +1122,7 @@ efi_status_t efi_bootmgr_update_media_device_boot_option(void)
goto out;
}
- /* enumerate all devices supporting EFI_SIMPLE_FILE_SYSTEM_PROTOCOL */
- ret = efi_bootmgr_enumerate_boot_option(opt, volume_handles, count);
+ ret = efi_bootmgr_enumerate_boot_options(opt, handles, &count);
if (ret != EFI_SUCCESS)
goto out;
@@ -1121,7 +1170,7 @@ out:
free(opt[i].lo);
}
free(opt);
- efi_free_pool(volume_handles);
+ efi_free_pool(handles);
if (ret == EFI_NOT_FOUND)
return EFI_SUCCESS;
--
2.34.1
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