1 files changed, 68 insertions, 0 deletions
diff --git a/fs/xfs/xfs_itable.h b/fs/xfs/xfs_itable.h
new file mode 100644
index 000000000..e2d0eba43
--- /dev/null
+++ b/fs/xfs/xfs_itable.h
@@ -0,0 +1,68 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (c) 2000-2001 Silicon Graphics, Inc.  All Rights Reserved.
+ */
+#ifndef __XFS_ITABLE_H__
+#define	__XFS_ITABLE_H__
+
+/* In-memory representation of a userspace request for batch inode data. */
+struct xfs_ibulk {
+	struct xfs_mount	*mp;
+	struct user_namespace   *mnt_userns;
+	void __user		*ubuffer; /* user output buffer */
+	xfs_ino_t		startino; /* start with this inode */
+	unsigned int		icount;   /* number of elements in ubuffer */
+	unsigned int		ocount;   /* number of records returned */
+	unsigned int		flags;    /* see XFS_IBULK_FLAG_* */
+};
+
+/* Only iterate within the same AG as startino */
+#define XFS_IBULK_SAME_AG	(1U << 0)
+
+/* Fill out the bs_extents64 field if set. */
+#define XFS_IBULK_NREXT64	(1U << 1)
+
+/*
+ * Advance the user buffer pointer by one record of the given size.  If the
+ * buffer is now full, return the appropriate error code.
+ */
+static inline int
+xfs_ibulk_advance(
+	struct xfs_ibulk	*breq,
+	size_t			bytes)
+{
+	char __user		*b = breq->ubuffer;
+
+	breq->ubuffer = b + bytes;
+	breq->ocount++;
+	return breq->ocount == breq->icount ? -ECANCELED : 0;
+}
+
+/*
+ * Return stat information in bulk (by-inode) for the filesystem.
+ */
+
+/*
+ * Return codes for the formatter function are 0 to continue iterating, and
+ * non-zero to stop iterating.  Any non-zero value will be passed up to the
+ * bulkstat/inumbers caller.  The special value -ECANCELED can be used to stop
+ * iteration, as neither bulkstat nor inumbers will ever generate that error
+ * code on their own.
+ */
+
+typedef int (*bulkstat_one_fmt_pf)(struct xfs_ibulk *breq,
+		const struct xfs_bulkstat *bstat);
+
+int xfs_bulkstat_one(struct xfs_ibulk *breq, bulkstat_one_fmt_pf formatter);
+int xfs_bulkstat(struct xfs_ibulk *breq, bulkstat_one_fmt_pf formatter);
+void xfs_bulkstat_to_bstat(struct xfs_mount *mp, struct xfs_bstat *bs1,
+		const struct xfs_bulkstat *bstat);
+
+typedef int (*inumbers_fmt_pf)(struct xfs_ibulk *breq,
+		const struct xfs_inumbers *igrp);
+
+int xfs_inumbers(struct xfs_ibulk *breq, inumbers_fmt_pf formatter);
+void xfs_inumbers_to_inogrp(struct xfs_inogrp *ig1,
+		const struct xfs_inumbers *ig);
+
+#endif	/* __XFS_ITABLE_H__ */