grub2/grub2-efi-HP-workaround.patch

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v2: Add GRUB_FILE_TYPE_CONFIG to grub_file_open, see also upstream commit
ca0a4f689 verifiers: File type for fine-grained signature-verification controlling
--- a/grub-core/kern/efi/init.c
+++ b/grub-core/kern/efi/init.c
@@ -28,6 +28,7 @@
#include <grub/env.h>
#include <grub/mm.h>
#include <grub/kernel.h>
+#include <grub/file.h>
#include <grub/stack_protector.h>
#ifdef GRUB_STACK_PROTECTOR
@@ -135,6 +136,67 @@
void (*grub_efi_net_config) (grub_efi_handle_t hnd,
char **device,
char **path);
+static char *
+workaround_efi_firmware_path (const char *device, const char *path)
+{
+ char *config = NULL;;
+ char *config_upper = NULL;
+ char *path_upper = NULL;
+ char *ret_path = NULL;
+ grub_file_t config_fd = NULL;
+ char *s;
+
+ if (!device || !path)
+ return NULL;
+
+ /* only workaround if booting off from cd device */
+ if (grub_strncmp (device, "cd", 2) != 0)
+ goto quit;
+
+ config = grub_xasprintf ("(%s)%s/grub.cfg", device, path);
+ config_fd = grub_file_open (config, GRUB_FILE_TYPE_CONFIG);
+
+ /* everything's fine, so quit the workaround */
+ if (config_fd)
+ goto quit;
+
+ /* reset grub error state because noone else does... */
+ grub_errno = GRUB_ERR_NONE;
+
+ /* try again, this time upper case path */
+ path_upper = grub_strdup (path);
+ if (! path_upper)
+ goto quit;
+
+ s = path_upper;
+ for (; *s; s++) *s = grub_toupper(*s);
+
+ config_upper = grub_xasprintf ("(%s)%s/grub.cfg", device, path_upper);
+ if (! config_upper)
+ goto quit;
+
+ config_fd = grub_file_open (config_upper, GRUB_FILE_TYPE_CONFIG);
+
+ /* if config can be found by the upper case path, return it */
+ if (config_fd)
+ ret_path = grub_strdup (path_upper);
+
+quit:
+
+ if (config_fd)
+ grub_file_close (config_fd);
+
+ if (grub_errno)
+ grub_errno = GRUB_ERR_NONE;
+
+ if (config)
+ grub_free (config);
+
+ if (config_upper)
+ grub_free (config_upper);
+
+ return ret_path;
+}
void
grub_machine_get_bootlocation (char **device, char **path)
@@ -159,6 +221,12 @@
p = grub_strrchr (*path, '/');
if (p)
*p = '\0';
+
+ if ((p = workaround_efi_firmware_path (*device, *path)))
+ {
+ grub_free (*path);
+ *path = p;
+ }
}
}