47 lines
1.4 KiB
Diff
47 lines
1.4 KiB
Diff
|
Index: grub-2.02~beta3/grub-core/fs/btrfs.c
|
||
|
|
===================================================================
|
||
|
|
--- grub-2.02~beta3.orig/grub-core/fs/btrfs.c
|
||
|
|
+++ grub-2.02~beta3/grub-core/fs/btrfs.c
|
||
|
|
@@ -925,10 +925,40 @@ lookup_root_by_name(struct grub_btrfs_da
|
||
|
|
}
|
||
|
|
|
||
|
|
static grub_err_t
|
||
|
|
+lookup_root_by_name_fallback(struct grub_btrfs_data *data, const char *path)
|
||
|
|
+{
|
||
|
|
+ grub_err_t err;
|
||
|
|
+ grub_uint64_t tree = 0;
|
||
|
|
+ grub_uint8_t type;
|
||
|
|
+ struct grub_btrfs_key key;
|
||
|
|
+
|
||
|
|
+ err = find_path (data, path, &key, &tree, &type);
|
||
|
|
+ if (err)
|
||
|
|
+ return grub_error(GRUB_ERR_FILE_NOT_FOUND, "couldn't locate %s\n", path);
|
||
|
|
+
|
||
|
|
+ if (key.object_id != grub_cpu_to_le64_compile_time (GRUB_BTRFS_OBJECT_ID_CHUNK) || tree == 0)
|
||
|
|
+ return grub_error(GRUB_ERR_BAD_FILE_TYPE, "%s: not a subvolume\n", path);
|
||
|
|
+
|
||
|
|
+ data->fs_tree = tree;
|
||
|
|
+ return GRUB_ERR_NONE;
|
||
|
|
+}
|
||
|
|
+
|
||
|
|
+static grub_err_t
|
||
|
|
btrfs_handle_subvol(struct grub_btrfs_data *data __attribute__ ((unused)))
|
||
|
|
{
|
||
|
|
if (btrfs_default_subvol)
|
||
|
|
- return lookup_root_by_name(data, btrfs_default_subvol);
|
||
|
|
+ {
|
||
|
|
+ grub_err_t err;
|
||
|
|
+ err = lookup_root_by_name(data, btrfs_default_subvol);
|
||
|
|
+
|
||
|
|
+ /* Fallback to old schemes */
|
||
|
|
+ if (err == GRUB_ERR_FILE_NOT_FOUND)
|
||
|
|
+ {
|
||
|
|
+ err = GRUB_ERR_NONE;
|
||
|
|
+ return lookup_root_by_name_fallback(data, btrfs_default_subvol);
|
||
|
|
+ }
|
||
|
|
+ return err;
|
||
|
|
+ }
|
||
|
|
|
||
|
|
if (btrfs_default_subvolid)
|
||
|
|
return lookup_root_by_id(data, btrfs_default_subvolid);
|