CVS commit: src/share/examples/rump/umserv

[Antti Kantee <pooka%netbsd.org@localhost>]

Module Name:    src
Committed By:   pooka
Date:           Tue Dec 22 18:36:02 UTC 2009

Added Files:
        src/share/examples/rump/umserv: Makefile umserv.c

Log Message:
Add a simple example of how to run the kernel umass/USB in userspace
and attach it back to the host kernel using pud(4).  The result is
pretty much indistinguisable from if kernel drivers were used.

It's possible to e.g. mount a file system backed by the userspace
block device driver:

golem> disklabel ./rumpsd0d
[...]
5 partitions:
#        size    offset     fstype [fsize bsize cpg/sgs]
 d:   1994752         0     unused      0     0        # (Cyl.      0 -   3895)
 e:   1994512       240      MSDOS                     # (Cyl.      0*-   3895)

golem> s mount_msdos ./rumpsd0a /mnt
mount_msdos: "./rumpsd0a" is a non-resolved or relative path.
mount_msdos: using "/usr/home/pooka/src/umserv/rumpsd0a" instead.
mount_msdos: /usr/home/pooka/src/umserv/rumpsd0a on /mnt: Device not configured

golem> s mount_msdos ./rumpsd0e /mnt
mount_msdos: "./rumpsd0e" is a non-resolved or relative path.
mount_msdos: using "/usr/home/pooka/src/umserv/rumpsd0e" instead.
golem> df -h /mnt
Filesystem                               Size       Used      Avail %Cap 
Mounted on
/usr/home/pooka/src/umserv/rumpsd0e      974M       5.2M       968M   0% /mnt

etcetc.


To generate a diff of this commit:
cvs rdiff -u -r0 -r1.1 src/share/examples/rump/umserv/Makefile \
    src/share/examples/rump/umserv/umserv.c

Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.