[PATCH 51/58] xfs_repair: metadata dirs are never plausible root dirs

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From: Darrick J. Wong <djwong@xxxxxxxxxx>

Metadata directories are never candidates to be the root of the
user-accessible directory tree.  Update has_plausible_rootdir to ignore
them all, as well as detecting the case where the superblock incorrectly
thinks both trees have the same root.

Signed-off-by: Darrick J. Wong <djwong@xxxxxxxxxx>
---
 repair/xfs_repair.c |    6 ++++++
 1 file changed, 6 insertions(+)


diff --git a/repair/xfs_repair.c b/repair/xfs_repair.c
index d881d5ec4ac..fe24f66ab98 100644
--- a/repair/xfs_repair.c
+++ b/repair/xfs_repair.c
@@ -541,9 +541,15 @@ has_plausible_rootdir(
 	int			error;
 	bool			ret = false;
 
+	if (xfs_has_metadir(mp) &&
+	    mp->m_sb.sb_rootino == mp->m_sb.sb_metadirino)
+		goto out;
+
 	error = -libxfs_iget(mp, NULL, mp->m_sb.sb_rootino, 0, &ip);
 	if (error)
 		goto out;
+	if (xfs_is_metadir_inode(ip))
+		goto out_rele;
 	if (!S_ISDIR(VFS_I(ip)->i_mode))
 		goto out_rele;
 





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