DragonFlyBSD

Matt,

I'd like to use 0x00000020 for MNT_AUTOMOUNTED for autofs since 0x20 is currently unused.
Auto(un)mountd (userspace daemon) needs this flag to distinguish filesystems mounted via autofs from others.

I don't want the new flag to be 0x0000000100000000ULL after MNT_NOCLUSTERW because this requires 64 bit mount flag (while mount(2) can only take int flag).

FreeBSD's autofs uses 0x0000000200000000ULL for the same macro, since FreeBSD has already extended it to uint64_t 5 years ago.

#define MNT_AUTOMOUNTED 0x0000000200000000ULL /* mounted by automountd(8) */

1. grep "#define[[:space:]]MNT_" . -rIH | grep -v MNT_WAIT | grep -v MNT_NOWAIT | grep -v MNT_LAZY | grep -v "sys/vfs/tmpfs" | awk '{print $3 " " $2 " " $1}' | sort
   (MNT_RDONLY MNT_VISFLAGMASK ./sys/sys/mount.h:#define
   (MNT_UPDATE|MNT_DELEXPORT|MNT_RELOAD|MNT_FORCE) MNT_CMDFLAGS ./sys/sys/mount.h:#define
   0x00000001 MNT_RDONLY ./sys/sys/mount.h:#define
   0x00000002 MNT_SYNCHRONOUS ./sys/sys/mount.h:#define
   0x00000004 MNT_NOEXEC ./sys/sys/mount.h:#define
   0x00000008 MNT_NOSUID ./sys/sys/mount.h:#define
   0x00000010 MNT_NODEV ./sys/sys/mount.h:#define
   0x00000040 MNT_ASYNC ./sys/sys/mount.h:#define
   0x00000080 MNT_EXRDONLY ./sys/sys/mount.h:#define
   0x00000100 MNT_EXPORTED ./sys/sys/mount.h:#define
   0x00000200 MNT_DEFEXPORTED ./sys/sys/mount.h:#define
   0x00000400 MNT_EXPORTANON ./sys/sys/mount.h:#define
   0x00000800 MNT_EXKERB ./sys/sys/mount.h:#define
   0x00001000 MNT_LOCAL ./sys/sys/mount.h:#define
   0x00002000 MNT_QUOTA ./sys/sys/mount.h:#define
   0x00004000 MNT_ROOTFS ./sys/sys/mount.h:#define
   0x00008000 MNT_USER ./sys/sys/mount.h:#define
   0x00010000 MNT_UPDATE ./sys/sys/mount.h:#define
   0x00020000 MNT_DELEXPORT ./sys/sys/mount.h:#define
   0x00040000 MNT_RELOAD ./sys/sys/mount.h:#define
   0x00080000 MNT_FORCE ./sys/sys/mount.h:#define
   0x00100000 MNT_SUIDDIR ./sys/sys/mount.h:#define
   0x00200000 MNT_SOFTDEP ./sys/sys/mount.h:#define
   0x00400000 MNT_NOSYMFOLLOW ./sys/sys/mount.h:#define
   0x00800000 MNT_IGNORE ./sys/sys/mount.h:#define
   0x01000000 MNT_TRIM ./sys/sys/mount.h:#define
   0x10000000 MNT_NOATIME ./sys/sys/mount.h:#define
   0x20000000 MNT_EXPUBLIC ./sys/sys/mount.h:#define
   0x40000000 MNT_NOCLUSTERR ./sys/sys/mount.h:#define
   0x80000000 MNT_NOCLUSTERW ./sys/sys/mount.h:#define