This replaces the current ioctl processing with a direct call path
from geom_dev() where the ioctl arrives (from SPECFS) to any directly
connected GEOM class.
The inverse of the above is no longer supported. This is the
situation were you have one or more intervening GEOM classes, for
instance a BSDlabel on top of a MBR or PC98. If you want to issue
MBR or PC98 specific ioctls, you will need to issue them on a MBR
or PC98 providers.
This paves the way for inviting CD's, FD's and other special cases
inside GEOM.
device should handle them.
This prevents for instance GEOM::ioctl requests from reaching a
lower BSDlabel node, which ps@ found would confuse newfs(8).
redundant paths to the same device.
This class reacts to a label in the first sector of the device,
which is created the following way:
# "0123456789abcdef012345..."
# "<----magic-----><-id-...>
echo "GEOM::FOX someid" | dd of=/dev/da0 conv=sync
NB: Since the fact that multiple disk devices are in fact the same
device is not known to GEOM, the geom taste/spoil process cannot
fully catch all corner cases and this module can therefore be
confused if you do the right wrong things.
NB: The disk level drivers need to do the right thing for this to
be useful, and that is not by definition currently the case.
Attach to the component devices using GEOM semantics.
Create a GEOM provider instead of using disk_create()
Use the GEOM OAM api for configuration.
I saw approx ~1% speedup in througput and ~7% in latency in a
simple minded test of a two-disk striped device.
This file was repo-copied from src/sys/dev/ccd/ccd.c.
This is not yet linked into the build.
Change the list interface to simplify things.
Remove old list ioctls which bogusly exported the softc to userland.
Move the softc and associated structures from the public header to
the source file.
Make CCD a GEOM class.
For now only use this for implementing a OAM config method which
can return a list of configured CCD devices in the format which
"ccdconfig -g[v]" would normally output.
hinge on the "verb" parameter which the class gets to interpret as
it sees fit.
Move the entire request into the kernel and move changed parameters
back when done.
Use ->init() and ->fini() to handle the mutex in geom_disk.c
Remove the g_add_class() function and replace it with a standardized
g_modevent() function.
This adds the basic infrastructure for loading/unloading GEOM classes
