On 06/03/13 00:28, Dave Chinner wrote:
From: Dave Chinner<dchinner@xxxxxxxxxx>
attr2 format is always enabled for v5 superblock filesystems, so the
mount options to enable or disable it need to be cause mount errors.
Signed-off-by: Dave Chinner<dchinner@xxxxxxxxxx>
---
Documentation/filesystems/xfs.txt | 3 +++
fs/xfs/xfs_super.c | 11 +++++++++++
2 files changed, 14 insertions(+)
diff --git a/Documentation/filesystems/xfs.txt b/Documentation/filesystems/xfs.txt
index 3e4b3dd..83577f0 100644
--- a/Documentation/filesystems/xfs.txt
+++ b/Documentation/filesystems/xfs.txt
@@ -33,6 +33,9 @@ When mounting an XFS filesystem, the following options are accepted.
removing extended attributes) the on-disk superblock feature
bit field will be updated to reflect this format being in use.
+ CRC enabled filesystems always use the attr2 format, and so
Filesystems using the version 5 superblock always use the attr2 format,
and so
+ will reject the noattr2 mount option if it is set.
reject the noattr2 mount option if it is set.
+
barrier
Enables the use of block layer write barriers for writes into
the journal and unwritten extent conversion. This allows for
diff --git a/fs/xfs/xfs_super.c b/fs/xfs/xfs_super.c
index ea341ce..f62abb2 100644
--- a/fs/xfs/xfs_super.c
+++ b/fs/xfs/xfs_super.c
@@ -1373,6 +1373,17 @@ xfs_finish_flags(
}
/*
+ * CRC enabled filesystems always use attr2 format for attributes.
V5 filesystems always use attr2 format for attributes.
+ */
+ if (xfs_sb_version_hascrc(&mp->m_sb)&&
...
--Mark.
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