grub2/0080-Fallback-to-old-subvol-name-scheme-to-support-old-sn.patch
Petr Šabata 100e37f2e6 RHEL 9.0.0 Alpha bootstrap
The content of this branch was automatically imported from Fedora ELN
with the following as its source:
https://src.fedoraproject.org/rpms/grub2#f7e054f3d693af43a903faf33b70673f7aca4508
2020-10-15 09:48:35 +02:00

59 lines
1.8 KiB
Diff

From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Andrei Borzenkov <arvidjaar@gmail.com>
Date: Tue, 21 Jun 2016 16:44:17 +0000
Subject: [PATCH] Fallback to old subvol name scheme to support old snapshot
config
Ref: bsc#953538
---
grub-core/fs/btrfs.c | 32 +++++++++++++++++++++++++++++++-
1 file changed, 31 insertions(+), 1 deletion(-)
diff --git a/grub-core/fs/btrfs.c b/grub-core/fs/btrfs.c
index 162723423ca..69c30e62354 100644
--- a/grub-core/fs/btrfs.c
+++ b/grub-core/fs/btrfs.c
@@ -1240,11 +1240,41 @@ lookup_root_by_name(struct grub_btrfs_data *data, const char *path)
return GRUB_ERR_NONE;
}
+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);