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efidisk: move device path helpers in core for efinet

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This commit is contained in:
Andrei Borzenkov 2015-05-07 20:37:16 +03:00
parent 16a7e723ea
commit 7b386b7031
3 changed files with 55 additions and 51 deletions
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61
grub-core/disk/efi/efidisk.c
View file

@ -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;
@ -810,14 +769,14 @@ 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)))

41
grub-core/kern/efi/efi.c
View file

@ -394,6 +394,47 @@ 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)
{

4
include/grub/efi/efi.h
View file

@ -53,6 +53,10 @@ 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,