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

illumos DDI specific (illumos 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:

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

o: 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);
}