[PATCH 10/37] xfs: pretty print metadata file types in error messages

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From: Darrick J. Wong <djwong@xxxxxxxxxx>

Create a helper function to turn a metadata file type code into a
printable string, and use this to complain about lockdep problems with
rtgroup inodes.  We'll use this more in the next patch.

Signed-off-by: "Darrick J. Wong" <djwong@xxxxxxxxxx>
---
 fs/xfs/libxfs/xfs_metafile.h |   17 +++++++++++++++++
 fs/xfs/libxfs/xfs_rtgroup.c  |    3 ++-
 2 files changed, 19 insertions(+), 1 deletion(-)


diff --git a/fs/xfs/libxfs/xfs_metafile.h b/fs/xfs/libxfs/xfs_metafile.h
index 8d8f08a6071c23..9df8619d5fb1a9 100644
--- a/fs/xfs/libxfs/xfs_metafile.h
+++ b/fs/xfs/libxfs/xfs_metafile.h
@@ -6,6 +6,23 @@
 #ifndef __XFS_METAFILE_H__
 #define __XFS_METAFILE_H__
 
+static inline const char *
+xfs_metafile_type_str(enum xfs_metafile_type metatype)
+{
+	static const struct {
+		enum xfs_metafile_type	mtype;
+		const char		*name;
+	} strings[] = { XFS_METAFILE_TYPE_STR };
+	unsigned int	i;
+
+	for (i = 0; i < ARRAY_SIZE(strings); i++) {
+		if (strings[i].mtype == metatype)
+			return strings[i].name;
+	}
+
+	return NULL;
+}
+
 /* All metadata files must have these flags set. */
 #define XFS_METAFILE_DIFLAGS	(XFS_DIFLAG_IMMUTABLE | \
 				 XFS_DIFLAG_SYNC | \
diff --git a/fs/xfs/libxfs/xfs_rtgroup.c b/fs/xfs/libxfs/xfs_rtgroup.c
index a79b734e70440d..9e5fdc0dc55cef 100644
--- a/fs/xfs/libxfs/xfs_rtgroup.c
+++ b/fs/xfs/libxfs/xfs_rtgroup.c
@@ -282,7 +282,8 @@ xfs_rtginode_ilock_print_fn(
 	const struct xfs_inode *ip =
 		container_of(m, struct xfs_inode, i_lock.dep_map);
 
-	printk(KERN_CONT " rgno=%u", ip->i_projid);
+	printk(KERN_CONT " rgno=%u metatype=%s", ip->i_projid,
+			xfs_metafile_type_str(ip->i_metatype));
 }
 
 /*





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