Merge PR #61275 into wip-jcollin-testing-20250925.080745-reef

* refs/pull/61275/head:
	ceph-fuse: Improve fuse mount usage message

Author: joscollin

src/ceph_fuse.cc

@@ -81,9 +81,10 @@ static void fuse_usage()
 void usage()
 {
   cout <<
-"usage: ceph-fuse [-n client.username] [-m mon-ip-addr:mon-port] <mount point> [OPTIONS]\n"
-"  --client_mountpoint/-r <sub_directory>\n"
-"                    use sub_directory as the mounted root, rather than the full Ceph tree.\n"
+"\nusage: ceph-fuse [-n client.username] [-m mon-ip-addr:mon-port] [--client_fs <fsname>] [--client_mountpoint/-r <sub_directory>] <mount point> [OPTIONS]\n\n"
+
+"  --client_mountpoint/-r: use sub_directory as the mounted root, rather than the full CephFS tree.\n"
+"  --client_fs: named file system to mount (default: usually the first file system created).\n"
 "\n";
   fuse_usage();
   generic_client_usage();