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-rw-r--r--include/linux/exportfs.h5
1 files changed, 5 insertions, 0 deletions
diff --git a/include/linux/exportfs.h b/include/linux/exportfs.h
index c7e6b6392ab8..5b9b5b317180 100644
--- a/include/linux/exportfs.h
+++ b/include/linux/exportfs.h
@@ -83,6 +83,11 @@ enum fid_type {
* 64 bit parent inode number.
*/
FILEID_NILFS_WITH_PARENT = 0x62,
+
+ /*
+ * Filesystems must not use 0xff file ID.
+ */
+ FILEID_INVALID = 0xff,
};
struct fid {