xfs: reload entire unlinked bucket lists

The previous patch to reload unrecovered unlinked inodes when adding a
newly created inode to the unlinked list is missing a key piece of
functionality.  It doesn't handle the case that someone calls xfs_iget
on an inode that is not the last item in the incore list.  For example,
if at mount time the ondisk iunlink bucket looks like this:

AGI -> 7 -> 22 -> 3 -> NULL

None of these three inodes are cached in memory.  Now let's say that
someone tries to open inode 3 by handle.  We need to walk the list to
make sure that inodes 7 and 22 get loaded cold, and that the
i_prev_unlinked of inode 3 gets set to 22.

Signed-off-by: Darrick J. Wong <djwong@kernel.org>

1 files changed, 6 insertions, 0 deletions

diff --git a/fs/xfs/xfs_export.c b/fs/xfs/xfs_export.c
index 1064c2342876..f71ea786a6d2 100644
--- a/fs/xfs/xfs_export.c
+++ b/fs/xfs/xfs_export.c
@@ -146,6 +146,12 @@ xfs_nfs_get_inode(
 		return ERR_PTR(error);
 	}
 
+	error = xfs_inode_reload_unlinked(ip);
+	if (error) {
+		xfs_irele(ip);
+		return ERR_PTR(error);
+	}
+
 	if (VFS_I(ip)->i_generation != generation) {
 		xfs_irele(ip);
 		return ERR_PTR(-ESTALE);