From 559b04c2e29643b73f238cf95add8cef9a192a00 Mon Sep 17 00:00:00 2001

From: Andrei Borzenkov <arvidjaar@gmail.com>

Date: Thu, 7 May 2015 20:37:16 +0300

Subject: [PATCH 01/17] efidisk: move device path helpers in core for efinet

---

 grub-core/disk/efi/efidisk.c | 61 ++++++++------------------------------------

 grub-core/kern/efi/efi.c     | 41 +++++++++++++++++++++++++++++

 include/grub/efi/efi.h       |  4 +++

 3 files changed, 55 insertions(+), 51 deletions(-)

diff --git a/grub-core/disk/efi/efidisk.c b/grub-core/disk/efi/efidisk.c

index 3b12c34..845c66f 100644

--- a/grub-core/disk/efi/efidisk.c

+++ b/grub-core/disk/efi/efidisk.c

@@ -43,47 +43,6 @@ static struct grub_efidisk_data *fd_devices;

 static struct grub_efidisk_data *hd_devices;

 static struct grub_efidisk_data *cd_devices;

-/* Duplicate a device path.  */

-static grub_efi_device_path_t *

-duplicate_device_path (const grub_efi_device_path_t *dp)

-{

-  grub_efi_device_path_t *p;

-  grub_size_t total_size = 0;

-

-  for (p = (grub_efi_device_path_t *) dp;

-       ;

-       p = GRUB_EFI_NEXT_DEVICE_PATH (p))

-    {

-      total_size += GRUB_EFI_DEVICE_PATH_LENGTH (p);

-      if (GRUB_EFI_END_ENTIRE_DEVICE_PATH (p))

-	break;

-    }

-

-  p = grub_malloc (total_size);

-  if (! p)

-    return 0;

-

-  grub_memcpy (p, dp, total_size);

-  return p;

-}

-

-/* Return the device path node right before the end node.  */

-static grub_efi_device_path_t *

-find_last_device_path (const grub_efi_device_path_t *dp)

-{

-  grub_efi_device_path_t *next, *p;

-

-  if (GRUB_EFI_END_ENTIRE_DEVICE_PATH (dp))

-    return 0;

-

-  for (p = (grub_efi_device_path_t *) dp, next = GRUB_EFI_NEXT_DEVICE_PATH (p);

-       ! GRUB_EFI_END_ENTIRE_DEVICE_PATH (next);

-       p = next, next = GRUB_EFI_NEXT_DEVICE_PATH (next))

-    ;

-

-  return p;

-}

-

 static struct grub_efidisk_data *

 make_devices (void)

 {

@@ -110,7 +69,7 @@ make_devices (void)

       if (! dp)

 	continue;

-      ldp = find_last_device_path (dp);

+      ldp = grub_efi_find_last_device_path (dp);

       if (! ldp)

 	/* This is empty. Why?  */

 	continue;

@@ -150,11 +109,11 @@ find_parent_device (struct grub_efidisk_data *devices,

   grub_efi_device_path_t *dp, *ldp;

   struct grub_efidisk_data *parent;

-  dp = duplicate_device_path (d->device_path);

+  dp = grub_efi_duplicate_device_path (d->device_path);

   if (! dp)

     return 0;

-  ldp = find_last_device_path (dp);

+  ldp = grub_efi_find_last_device_path (dp);

   ldp->type = GRUB_EFI_END_DEVICE_PATH_TYPE;

   ldp->subtype = GRUB_EFI_END_ENTIRE_DEVICE_PATH_SUBTYPE;

   ldp->length = sizeof (*ldp);

@@ -180,11 +139,11 @@ is_child (struct grub_efidisk_data *child,

   grub_efi_device_path_t *dp, *ldp;

   int ret;

-  dp = duplicate_device_path (child->device_path);

+  dp = grub_efi_duplicate_device_path (child->device_path);

   if (! dp)

     return 0;

-  ldp = find_last_device_path (dp);

+  ldp = grub_efi_find_last_device_path (dp);

   ldp->type = GRUB_EFI_END_DEVICE_PATH_TYPE;

   ldp->subtype = GRUB_EFI_END_ENTIRE_DEVICE_PATH_SUBTYPE;

   ldp->length = sizeof (*ldp);

@@ -207,8 +166,8 @@ add_device (struct grub_efidisk_data **devices, struct grub_efidisk_data *d)

     {

       int ret;

-      ret = grub_efi_compare_device_paths (find_last_device_path ((*p)->device_path),

-					   find_last_device_path (d->device_path));

+      ret = grub_efi_compare_device_paths (grub_efi_find_last_device_path ((*p)->device_path),

+					   grub_efi_find_last_device_path (d->device_path));

       if (ret == 0)

 	ret = grub_efi_compare_device_paths ((*p)->device_path,

 					     d->device_path);

@@ -795,7 +754,7 @@ grub_efidisk_get_device_name (grub_efi_handle_t *handle)

   if (! dp)

     return 0;

-  ldp = find_last_device_path (dp);

+  ldp = grub_efi_find_last_device_path (dp);

   if (! ldp)

     return 0;

@@ -811,14 +770,14 @@ grub_efidisk_get_device_name (grub_efi_handle_t *handle)

       /* It is necessary to duplicate the device path so that GRUB

 	 can overwrite it.  */

-      dup_dp = duplicate_device_path (dp);

+      dup_dp = grub_efi_duplicate_device_path (dp);

       if (! dup_dp)

 	return 0;

       while (1)

 	{

 	  grub_efi_device_path_t *dup_ldp;

-	  dup_ldp = find_last_device_path (dup_dp);

+	  dup_ldp = grub_efi_find_last_device_path (dup_dp);

 	  if (!(GRUB_EFI_DEVICE_PATH_TYPE (dup_ldp) == GRUB_EFI_MEDIA_DEVICE_PATH_TYPE

 		&& (GRUB_EFI_DEVICE_PATH_SUBTYPE (dup_ldp) == GRUB_EFI_CDROM_DEVICE_PATH_SUBTYPE

 		    || GRUB_EFI_DEVICE_PATH_SUBTYPE (dup_ldp) == GRUB_EFI_HARD_DRIVE_DEVICE_PATH_SUBTYPE)))

diff --git a/grub-core/kern/efi/efi.c b/grub-core/kern/efi/efi.c

index d99a6fb..c80d85b 100644

--- a/grub-core/kern/efi/efi.c

+++ b/grub-core/kern/efi/efi.c

@@ -423,6 +423,47 @@ grub_efi_get_device_path (grub_efi_handle_t handle)

 				 GRUB_EFI_OPEN_PROTOCOL_GET_PROTOCOL);

 }

+/* Return the device path node right before the end node.  */

+grub_efi_device_path_t *

+grub_efi_find_last_device_path (const grub_efi_device_path_t *dp)

+{

+  grub_efi_device_path_t *next, *p;

+

+  if (GRUB_EFI_END_ENTIRE_DEVICE_PATH (dp))

+    return 0;

+

+  for (p = (grub_efi_device_path_t *) dp, next = GRUB_EFI_NEXT_DEVICE_PATH (p);

+       ! GRUB_EFI_END_ENTIRE_DEVICE_PATH (next);

+       p = next, next = GRUB_EFI_NEXT_DEVICE_PATH (next))

+    ;

+

+  return p;

+}

+

+/* Duplicate a device path.  */

+grub_efi_device_path_t *

+grub_efi_duplicate_device_path (const grub_efi_device_path_t *dp)

+{

+  grub_efi_device_path_t *p;

+  grub_size_t total_size = 0;

+

+  for (p = (grub_efi_device_path_t *) dp;

+       ;

+       p = GRUB_EFI_NEXT_DEVICE_PATH (p))

+    {

+      total_size += GRUB_EFI_DEVICE_PATH_LENGTH (p);

+      if (GRUB_EFI_END_ENTIRE_DEVICE_PATH (p))

+	break;

+    }

+

+  p = grub_malloc (total_size);

+  if (! p)

+    return 0;

+

+  grub_memcpy (p, dp, total_size);

+  return p;

+}

+

 static void

 dump_vendor_path (const char *type, grub_efi_vendor_device_path_t *vendor)

 {

diff --git a/include/grub/efi/efi.h b/include/grub/efi/efi.h

index a000c38..2245632 100644

--- a/include/grub/efi/efi.h

+++ b/include/grub/efi/efi.h

@@ -56,6 +56,10 @@ void EXPORT_FUNC(grub_efi_print_device_path) (grub_efi_device_path_t *dp);

 char *EXPORT_FUNC(grub_efi_get_filename) (grub_efi_device_path_t *dp);

 grub_efi_device_path_t *

 EXPORT_FUNC(grub_efi_get_device_path) (grub_efi_handle_t handle);

+grub_efi_device_path_t *

+EXPORT_FUNC(grub_efi_find_last_device_path) (const grub_efi_device_path_t *dp);

+grub_efi_device_path_t *

+EXPORT_FUNC(grub_efi_duplicate_device_path) (const grub_efi_device_path_t *dp);

 grub_err_t EXPORT_FUNC (grub_efi_finish_boot_services) (grub_efi_uintn_t *outbuf_size, void *outbuf,

 							grub_efi_uintn_t *map_key,

 							grub_efi_uintn_t *efi_desc_size,

-- 

2.4.3