te
Copyright (c) 2007, Sun Microsystems, Inc., All Rights Reserved
The contents of this file are subject to the terms of the Common Development and Distribution License (the "License"). You may not use this file except in compliance with the License.
You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE or http://www.opensolaris.org/os/licensing. See the License for the specific language governing permissions and limitations under the License.
When distributing Covered Code, include this CDDL HEADER in each file and include the License file at usr/src/OPENSOLARIS.LICENSE. If applicable, add the following below this CDDL HEADER, with the fields enclosed by brackets "[]" replaced with your own identifying information: Portions Copyright [yyyy] [name of copyright owner]
LDI_EV_FINALIZE 9F "Aug 21, 2007"
NAME
ldi_ev_finalize - propagate disposition of a state change event
SYNOPSIS

#include <sys/sunldi.h>

void ldi_ev_finalize(dev_info_t *dip, minor_t minor, int spec_type,
 int ldi_result, ldi_ev_cookie_t cookie, void *ev_data);
INTERFACE LEVEL

Solaris DDI specific (Solaris DDI)

PARAMETERS
dev_info_t *dip

The devinfo node of the layered consumer exporting the minor device.

minor_t minor

The minor number of the exported minor device.

int spec_type

The type of minor device (S_IFCHR or S_IFBLK).

int ldi_result

The final disposition of the state change.

ldi_ev_cookie_t cookie

An opaque event cookie for the event type returned by a previous call to ldi_ev_get_cookie(9F).

void *ev_data

Event specific data.

DESCRIPTION

The ldi_ev_finalize() function propagates the final disposition of an event up the software stack. It may result in two actions:

Invocation of "finalize" LDI callback handlers registered by layered drivers up the software stack.

Device contract "negotiation end" (CT_EV_NEGEND) events generated on minors exported to userland.

The event propagated up the software stack may be different than the event received by the layered driver invoking ldi_ev_finalize(). For example, a volume manager may receive an "offline" event on one of it's LDI opened disks, but may choose to propagate a "degraded" event on minors it exports to userland (since it may have more than one copy of the data). The event cookie argument to ldi_ev_notify(9F) may be different from the event cookie currently possessed by the layered driver. If that is the case, the layered driver must generate another event cookie via a new ldi_ev_get_cookie(9F) call.

RETURN VALUES

None.

CONTEXT

This function can be called from user and kernel contexts only.

EXAMPLES

Example 1 Invoking ldi_ev_finalize(9F) from widget's finalize callback

The following example shows how the ldi_ev_finalize() function is invoked from a widget's finalize callback:

static void
widget_finalize(ldi_handle_t lh, ldi_ev_cookie_t foo_cookie,
 int ldi_result, void *arg, void *ev_data)

{
 ASSERT(strcmp(ldi_ev_get_type(foo_cookie), LDI_EV_FOO) == 0);

 /* Map imported minor to exported minors */
 widget_map(lh, &minor, &spec_type);

 if (ldi_result == LDI_EV_SUCCESS) {
 ldi_ev_finalize(dip, minor, spec_type,
 LDI_EV_SUCCESS, foo_cookie, ev_data);
 }

 /*
 * The event foo failed. Reconfigure yourself
 * *before* propagating
 */
 widget_reconfigure(lh, LDI_EV_FOO, REACQUIRE);

 ldi_ev_finalize(dip, minor, spec_type, LDI_EV_FAILURE,
 foo_cookie, ev_data);
}
SEE ALSO

ldi_ev_get_cookie(9F), ldi_ev_register_callbacks(9F), ldi_ev_remove_callbacks(9F)