Document the existing vfc_flags.

PR:		25837
Submitted by:	Tony Finch <dot@dotat.at>

2 files changed, 20 insertions, 3 deletions

diff --git a/lib/libc/gen/getvfsbyname.3 b/lib/libc/gen/getvfsbyname.3
index dd59d8a..ebaf787 100644
--- a/lib/libc/gen/getvfsbyname.3
+++ b/lib/libc/gen/getvfsbyname.3
@@ -67,8 +67,8 @@ the filesystem type number assigned by the kernel
 .It vfc_refcount
 the number of active mount points using the filesystem
 .It vfc_flags
-flag bits that are used to initialize a new mount point
-using the filesystem
+flag bits as described in
+.Xr getvfsent 3
 .El
 .Sh RETURN VALUES
 .Rv -std getvfsbyname
@@ -86,6 +86,7 @@ specifies a filesystem that is unknown or not configured in the kernel.
 .El
 .Sh SEE ALSO
 .Xr mount 2 ,
+.Xr getvfsent 3 ,
 .Xr sysctl 3 ,
 .Xr mount 8 ,
 .Xr sysctl 8
diff --git a/lib/libc/gen/getvfsent.3 b/lib/libc/gen/getvfsent.3
index f70f32f..1d5ddde9 100644
--- a/lib/libc/gen/getvfsent.3
+++ b/lib/libc/gen/getvfsent.3
@@ -48,7 +48,23 @@ the number of references to this filesystem
 (usually the number of mounts, but one greater for filesystems which
 cannot be unloaded or which are statically linked into the kernel)
 .It vfc_flags
-flag bits, of which none are currently defined
+flag bits
+.El
+.Pp
+The flags are defined as follows:
+.Bl -tag -width VFCF_SYNTHETIC
+.It Dv VFCF_STATIC
+statically compiled into kernel
+.It Dv VFCF_NETWORK
+may get data over the network
+.It Dv VFCF_READONLY
+writes are not implemented
+.It Dv VFCF_SYNTHETIC
+data does not represent real files
+.It Dv VFCF_LOOPBACK
+aliases some other mounted FS
+.It Dv VFCF_UNICODE
+stores file names as Unicode
 .El
 .Pp
 The