1 files changed, 78 insertions, 0 deletions
diff --git a/fs/xfs/scrub/orphanage.h b/fs/xfs/scrub/orphanage.h
new file mode 100644
index 000000000000..9ae1082e1e53
--- /dev/null
+++ b/fs/xfs/scrub/orphanage.h
@@ -0,0 +1,78 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Copyright (C) 2021 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);
+
+/* Information about a request to add a file to the orphanage. */
+struct xrep_orphanage_req {
+	/* Name structure; caller must provide a buffer separately. */
+	struct xfs_name		xname;
+
+	struct xfs_scrub	*sc;
+
+	/* Block reservations for orphanage and child (if directory). */
+	unsigned int		orphanage_blkres;
+	unsigned int		child_blkres;
+};
+
+static inline size_t
+xrep_orphanage_req_sizeof(void)
+{
+	return sizeof(struct xrep_orphanage_req) + MAXNAMELEN + 1;
+}
+
+void xrep_orphanage_compute_blkres(struct xfs_scrub *sc,
+		struct xrep_orphanage_req *orph);
+int xrep_orphanage_compute_name(struct xrep_orphanage_req *orph,
+		unsigned char *namebuf);
+int xrep_orphanage_ilock_resv_quota(struct xrep_orphanage_req *orph);
+int xrep_orphanage_adopt(struct xrep_orphanage_req *orph);
+
+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);
+#else
+# define xrep_orphanage_rele(sc)
+#endif /* CONFIG_XFS_ONLINE_REPAIR */
+
+#endif /* __XFS_SCRUB_ORPHANAGE_H__ */