efi_loader: Add el torito support
When loading an el torito image, uEFI exposes said image as a raw
block device to the payload.
Let's do the same by creating new block devices with added offsets for
the respective el torito partitions.
Signed-off-by: Alexander Graf <agraf@suse.de>
diff --git a/cmd/bootefi.c b/cmd/bootefi.c
index 3add632..0d09aa1 100644
--- a/cmd/bootefi.c
+++ b/cmd/bootefi.c
@@ -194,12 +194,26 @@
void efi_set_bootdev(const char *dev, const char *devnr)
{
+ __maybe_unused struct blk_desc *desc;
char devname[16] = { 0 }; /* dp->str is u16[16] long */
char *colon;
/* Assemble the condensed device name we use in efi_disk.c */
snprintf(devname, sizeof(devname), "%s%s", dev, devnr);
colon = strchr(devname, ':');
+
+#ifdef CONFIG_ISO_PARTITION
+ /* For ISOs we create partition block devices */
+ desc = blk_get_dev(dev, simple_strtol(devnr, NULL, 10));
+ if (desc && (desc->type != DEV_TYPE_UNKNOWN) &&
+ (desc->part_type == PART_TYPE_ISO)) {
+ if (!colon)
+ snprintf(devname, sizeof(devname), "%s%s:1", dev,
+ devnr);
+ colon = NULL;
+ }
+#endif
+
if (colon)
*colon = '\0';