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-rw-r--r--fs/xfs/xfs_exchrange.h38
1 files changed, 38 insertions, 0 deletions
diff --git a/fs/xfs/xfs_exchrange.h b/fs/xfs/xfs_exchrange.h
new file mode 100644
index 0000000000..039abcca54
--- /dev/null
+++ b/fs/xfs/xfs_exchrange.h
@@ -0,0 +1,38 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+/*
+ * Copyright (c) 2020-2024 Oracle. All Rights Reserved.
+ * Author: Darrick J. Wong <djwong@kernel.org>
+ */
+#ifndef __XFS_EXCHRANGE_H__
+#define __XFS_EXCHRANGE_H__
+
+/* Update the mtime/cmtime of file1 and file2 */
+#define __XFS_EXCHANGE_RANGE_UPD_CMTIME1 (1ULL << 63)
+#define __XFS_EXCHANGE_RANGE_UPD_CMTIME2 (1ULL << 62)
+
+#define XFS_EXCHANGE_RANGE_PRIV_FLAGS (__XFS_EXCHANGE_RANGE_UPD_CMTIME1 | \
+ __XFS_EXCHANGE_RANGE_UPD_CMTIME2)
+
+struct xfs_exchrange {
+ struct file *file1;
+ struct file *file2;
+
+ loff_t file1_offset;
+ loff_t file2_offset;
+ u64 length;
+
+ u64 flags; /* XFS_EXCHANGE_RANGE flags */
+};
+
+long xfs_ioc_exchange_range(struct file *file,
+ struct xfs_exchange_range __user *argp);
+
+struct xfs_exchmaps_req;
+
+void xfs_exchrange_ilock(struct xfs_trans *tp, struct xfs_inode *ip1,
+ struct xfs_inode *ip2);
+void xfs_exchrange_iunlock(struct xfs_inode *ip1, struct xfs_inode *ip2);
+
+int xfs_exchrange_estimate(struct xfs_exchmaps_req *req);
+
+#endif /* __XFS_EXCHRANGE_H__ */