From af3baf174a218cbd54291f0f76d1641c782aad64 Mon Sep 17 00:00:00 2001
From: Lennart Poettering <lennart@poettering.net>
Date: Fri, 8 Nov 2024 09:21:25 +0100
Subject: [PATCH] fs-util: add comment about XO_NOCOW

---
 src/basic/fs-util.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/src/basic/fs-util.c b/src/basic/fs-util.c
index db0a316e6d3..4ede324c34c 100644
--- a/src/basic/fs-util.c
+++ b/src/basic/fs-util.c
@@ -1131,6 +1131,8 @@ int xopenat_full(int dir_fd, const char *path, int open_flags, XOpenFlags xopen_
          *   • If O_CREAT is used with XO_LABEL, any created file will be immediately relabelled.
          *
          *   • If the path is specified NULL or empty, behaves like fd_reopen().
+         *
+         *   • If XO_NOCOW is specified will turn on the NOCOW btrfs flag on the file, if available.
          */
 
         if (isempty(path)) {
-- 
2.47.3