1 files changed, 86 insertions, 0 deletions
diff --git a/fs/xfs/scrub/orphanage.h b/fs/xfs/scrub/orphanage.h
new file mode 100644
index 000000000000..7c7a2e7d81db
--- /dev/null
+++ b/fs/xfs/scrub/orphanage.h
@@ -0,0 +1,86 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Copyright (c) 2021-2024 Oracle.  All Rights Reserved.
+ * Author: Darrick J. Wong <djwong@kernel.org>
+ */
+#ifndef __XFS_SCRUB_ORPHANAGE_H__
+#define __XFS_SCRUB_ORPHANAGE_H__
+
+#ifdef CONFIG_XFS_ONLINE_REPAIR
+int xrep_orphanage_create(struct xfs_scrub *sc);
+
+/*
+ * If we're doing a repair, ensure that the orphanage exists and attach it to
+ * the scrub context.
+ */
+static inline int
+xrep_orphanage_try_create(
+	struct xfs_scrub	*sc)
+{
+	int			error;
+
+	ASSERT(sc->sm->sm_flags & XFS_SCRUB_IFLAG_REPAIR);
+
+	error = xrep_orphanage_create(sc);
+	switch (error) {
+	case 0:
+	case -ENOENT:
+	case -ENOTDIR:
+	case -ENOSPC:
+		/*
+		 * If the orphanage can't be found or isn't a directory, we'll
+		 * keep going, but we won't be able to attach the file to the
+		 * orphanage if we can't find the parent.
+		 */
+		return 0;
+	}
+
+	return error;
+}
+
+int xrep_orphanage_iolock_two(struct xfs_scrub *sc);
+
+void xrep_orphanage_ilock(struct xfs_scrub *sc, unsigned int ilock_flags);
+bool xrep_orphanage_ilock_nowait(struct xfs_scrub *sc,
+		unsigned int ilock_flags);
+void xrep_orphanage_iunlock(struct xfs_scrub *sc, unsigned int ilock_flags);
+
+void xrep_orphanage_rele(struct xfs_scrub *sc);
+
+/* Information about a request to add a file to the orphanage. */
+struct xrep_adoption {
+	struct xfs_scrub	*sc;
+
+	/* Name used for the adoption. */
+	struct xfs_name		*xname;
+
+	/* Parent pointer context tracking */
+	struct xfs_parent_args	ppargs;
+
+	/* Block reservations for orphanage and child (if directory). */
+	unsigned int		orphanage_blkres;
+	unsigned int		child_blkres;
+
+	/*
+	 * Does the caller want us to bump the child link count?  This is not
+	 * needed when reattaching files that have become disconnected but have
+	 * nlink > 1.  It is necessary when changing the directory tree
+	 * structure.
+	 */
+	bool			bump_child_nlink:1;
+};
+
+bool xrep_orphanage_can_adopt(struct xfs_scrub *sc);
+
+int xrep_adoption_trans_alloc(struct xfs_scrub *sc,
+		struct xrep_adoption *adopt);
+int xrep_adoption_compute_name(struct xrep_adoption *adopt,
+		struct xfs_name *xname);
+int xrep_adoption_move(struct xrep_adoption *adopt);
+int xrep_adoption_trans_roll(struct xrep_adoption *adopt);
+#else
+struct xrep_adoption { /* empty */ };
+# define xrep_orphanage_rele(sc)	((void)0)
+#endif /* CONFIG_XFS_ONLINE_REPAIR */
+
+#endif /* __XFS_SCRUB_ORPHANAGE_H__ */