mirror of
https://src.fedoraproject.org/rpms/grub2.git
synced 2024-12-01 00:48:18 +00:00
57 lines
2.5 KiB
Diff
57 lines
2.5 KiB
Diff
From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
|
|
From: Daniel Kiper <daniel.kiper@oracle.com>
|
|
Date: Tue, 29 May 2018 16:16:02 +0200
|
|
Subject: [PATCH] xfs: Accept filesystem with sparse inodes
|
|
|
|
The sparse inode metadata format became a mkfs.xfs default in
|
|
xfsprogs-4.16.0, and such filesystems are now rejected by grub as
|
|
containing an incompatible feature.
|
|
|
|
In essence, this feature allows xfs to allocate inodes into fragmented
|
|
freespace. (Without this feature, if xfs could not allocate contiguous
|
|
space for 64 new inodes, inode creation would fail.)
|
|
|
|
In practice, the disk format change is restricted to the inode btree,
|
|
which as far as I can tell is not used by grub. If all you're doing
|
|
today is parsing a directory, reading an inode number, and converting
|
|
that inode number to a disk location, then ignoring this feature
|
|
should be fine, so I've added it to XFS_SB_FEAT_INCOMPAT_SUPPORTED
|
|
|
|
I did some brief testing of this patch by hacking up the regression
|
|
tests to completely fragment freespace on the test xfs filesystem, and
|
|
then write a large-ish number of inodes to consume any existing
|
|
contiguous 64-inode chunk. This way any files the grub tests add and
|
|
traverse would be in such a fragmented inode allocation. Tests passed,
|
|
but I'm not sure how to cleanly integrate that into the test harness.
|
|
|
|
Signed-off-by: Eric Sandeen <sandeen@redhat.com>
|
|
Reviewed-by: Daniel Kiper <daniel.kiper@oracle.com>
|
|
Tested-by: Chris Murphy <lists@colorremedies.com>
|
|
---
|
|
grub-core/fs/xfs.c | 11 ++++++++++-
|
|
1 file changed, 10 insertions(+), 1 deletion(-)
|
|
|
|
diff --git a/grub-core/fs/xfs.c b/grub-core/fs/xfs.c
|
|
index c6031bd3f71..3b00c744e23 100644
|
|
--- a/grub-core/fs/xfs.c
|
|
+++ b/grub-core/fs/xfs.c
|
|
@@ -79,9 +79,18 @@ GRUB_MOD_LICENSE ("GPLv3+");
|
|
#define XFS_SB_FEAT_INCOMPAT_SPINODES (1 << 1) /* sparse inode chunks */
|
|
#define XFS_SB_FEAT_INCOMPAT_META_UUID (1 << 2) /* metadata UUID */
|
|
|
|
-/* We do not currently verify metadata UUID so it is safe to read such filesystem */
|
|
+/*
|
|
+ * Directory entries with ftype are explicitly handled by GRUB code.
|
|
+ *
|
|
+ * We do not currently read the inode btrees, so it is safe to read filesystems
|
|
+ * with the XFS_SB_FEAT_INCOMPAT_SPINODES feature.
|
|
+ *
|
|
+ * We do not currently verify metadata UUID, so it is safe to read filesystems
|
|
+ * with the XFS_SB_FEAT_INCOMPAT_META_UUID feature.
|
|
+ */
|
|
#define XFS_SB_FEAT_INCOMPAT_SUPPORTED \
|
|
(XFS_SB_FEAT_INCOMPAT_FTYPE | \
|
|
+ XFS_SB_FEAT_INCOMPAT_SPINODES | \
|
|
XFS_SB_FEAT_INCOMPAT_META_UUID)
|
|
|
|
struct grub_xfs_sblock
|