Divorce "dev_t" from the "major|minor" bitmap, which is now called

udev_t in the kernel but still called dev_t in userland.

Provide functions to manipulate both types:
        major()         umajor()
        minor()         uminor()
        makedev()       umakedev()
        dev2udev()      udev2dev()

For now they're functions, they will become in-line functions
after one of the next two steps in this process.

Return major/minor/makedev to macro-hood for userland.

Register a name in cdevsw[] for the "filedescriptor" driver.

In the kernel the udev_t appears in places where we have the
major/minor number combination, (ie: a potential device: we
may not have the driver nor the device), like in inodes, vattr,
cdevsw registration and so on, whereas the dev_t appears where
we carry around a reference to a actual device.

In the future the cdevsw and the aliased-from vnode will be hung
directly from the dev_t, along with up to two softc pointers for
the device driver and a few houskeeping bits.  This will essentially
replace the current "alias" check code (same buck, bigger bang).

A little stunt has been provided to try to catch places where the
wrong type is being used (dev_t vs udev_t), if you see something
not working, #undef DEVT_FASCIST in kern/kern_conf.c and see if
it makes a difference.  If it does, please try to track it down
(many hands make light work) or at least try to reproduce it
as simply as possible, and describe how to do that.

Without DEVT_FASCIST I belive this patch is a no-op.

Stylistic/posixoid comments about the userland view of the <sys/*.h>
files welcome now, from userland they now contain the end result.

Next planned step: make all dev_t's refer to the same devsw[] which
means convert BLK's to CHR's at the perimeter of the vnodes and
other places where they enter the game (bootdev, mknod, sysctl).

1 files changed, 3 insertions, 3 deletions

diff --git a/sys/nfs/nfs_vnops.c b/sys/nfs/nfs_vnops.c
index 3a9e340..1737554 100644
--- a/sys/nfs/nfs_vnops.c
+++ b/sys/nfs/nfs_vnops.c
@@ -34,7 +34,7 @@
  * SUCH DAMAGE.
  *
  *	@(#)nfs_vnops.c	8.16 (Berkeley) 5/27/95
- * $Id: nfs_vnops.c,v 1.127 1999/05/06 18:13:05 peter Exp $
+ * $Id: nfs_vnops.c,v 1.128 1999/05/06 20:00:30 phk Exp $
  */
 
 
@@ -1242,8 +1242,8 @@ nfs_mknodrpc(dvp, vpp, cnp, vap)
 		nfsm_v3attrbuild(vap, FALSE);
 		if (vap->va_type == VCHR || vap->va_type == VBLK) {
 			nfsm_build(tl, u_int32_t *, 2 * NFSX_UNSIGNED);
-			*tl++ = txdr_unsigned(major(vap->va_rdev));
-			*tl = txdr_unsigned(minor(vap->va_rdev));
+			*tl++ = txdr_unsigned(umajor(vap->va_rdev));
+			*tl = txdr_unsigned(uminor(vap->va_rdev));
 		}
 	} else {
 		nfsm_build(sp, struct nfsv2_sattr *, NFSX_V2SATTR);