ldi_ev_finalize - man pages section 9: DDI and DKI Kernel Functions

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ldi_ev_finalize(9F)

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);
}

man pages section 9: DDI and DKI Kernel Functions