Document the new inode flag in struct fsxattr for reflink.
Signed-off-by: Darrick J. Wong <darrick.wong@xxxxxxxxxx>
---
man/man3/xfsctl.3 | 10 ++++++++++
1 file changed, 10 insertions(+)
diff --git a/man/man3/xfsctl.3 b/man/man3/xfsctl.3
index 9e7f138..ef6c992 100644
--- a/man/man3/xfsctl.3
+++ b/man/man3/xfsctl.3
@@ -230,6 +230,16 @@ If the filesystem lives on directly accessible persistent
memory, reads and
writes to this file will go straight to the persistent memory, bypassing the
page cache.
.TP
+.SM "Bit 16 (0x10000) \- XFS_XFLAG_REFLINK"
+This file is sharing or has shared blocks with another file.
+This flag can be set by reflinking or deduping blocks with another file
+and cleared by fallocating the entire file to pre-copy all shared extents.
+A file cannot have
+.BR XFS_XFLAG_REFLINK
+and
+.BR XFS_XFLAG_DAX
+set at the same time, that is to say that DAX files cannot share blocks.
+.TP
.SM "Bit 31 (0x80000000) \- XFS_XFLAG_HASATTR"
The file has extended attributes associated with it.
.RE
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