This is a note to let you know that I've just added the patch titled
xfs: ensure buffer types are set correctly
to the 3.18-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
xfs-ensure-buffer-types-are-set-correctly.patch
and it can be found in the queue-3.18 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <[email protected]> know about it.
>From 0d612fb570b71ea2e49554a770cff4c489018b2c Mon Sep 17 00:00:00 2001
From: Dave Chinner <[email protected]>
Date: Thu, 22 Jan 2015 09:29:05 +1100
Subject: xfs: ensure buffer types are set correctly
From: Dave Chinner <[email protected]>
commit 0d612fb570b71ea2e49554a770cff4c489018b2c upstream.
Jan Kara reported that log recovery was finding buffers with invalid
types in them. This should not happen, and indicates a bug in the
logging of buffers. To catch this, add asserts to the buffer
formatting code to ensure that the buffer type is in range when the
transaction is committed.
We don't set a type on buffers being marked stale - they are not
going to get replayed, the format item exists only for recovery to
be able to prevent replay of the buffer, so the type does not
matter. Hence that needs special casing here.
Reported-by: Jan Kara <[email protected]>
Tested-by: Jan Kara <[email protected]>
Signed-off-by: Dave Chinner <[email protected]>
Reviewed-by: Brian Foster <[email protected]>
Signed-off-by: Dave Chinner <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>
---
fs/xfs/xfs_buf_item.c | 4 ++++
1 file changed, 4 insertions(+)
--- a/fs/xfs/xfs_buf_item.c
+++ b/fs/xfs/xfs_buf_item.c
@@ -319,6 +319,10 @@ xfs_buf_item_format(
ASSERT(atomic_read(&bip->bli_refcount) > 0);
ASSERT((bip->bli_flags & XFS_BLI_LOGGED) ||
(bip->bli_flags & XFS_BLI_STALE));
+ ASSERT((bip->bli_flags & XFS_BLI_STALE) ||
+ (xfs_blft_from_flags(&bip->__bli_format) > XFS_BLFT_UNKNOWN_BUF
+ && xfs_blft_from_flags(&bip->__bli_format) < XFS_BLFT_MAX_BUF));
+
/*
* If it is an inode buffer, transfer the in-memory state to the
Patches currently in stable-queue which might be from [email protected] are
queue-3.18/xfs-set-buf-types-when-converting-extent-formats.patch
queue-3.18/xfs-inode-unlink-does-not-set-agi-buffer-type.patch
queue-3.18/xfs-ensure-buffer-types-are-set-correctly.patch
queue-3.18/xfs-set-superblock-buffer-type-correctly.patch
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