man/man9f/mac_init_ops.9f

 This file and its contents are supplied under the terms of the
 Common Development and Distribution License ("CDDL"), version 1.0.
 You may only use this file in accordance with the terms of version
 1.0 of the CDDL.

 A full copy of the text of the CDDL should have accompanied this
 source. A copy of the CDDL is also available via the Internet at
 http://www.illumos.org/license/CDDL.


 Copyright 2016 Joyent, Inc.

.Dd May 31, 2016
.Dt MAC_INIT_OPS 9F
.Os
.Sh NAME
.Nm mac_init_ops ,
.Nm mac_fini_ops
.Nd initialize and finalize driver support for the MAC framework
.Sh SYNOPSIS
n sys/mac_provider.h .Ft void
.Fo mac_init_ops
.Fa "struct dev_ops *ops"
.Fa "const char *name"
.Fc
.Ft void
.Fo mac_fini_ops
.Fa "struct dev_ops *ops"
.Fc
.Sh INTERFACE LEVEL
illumos DDI specific
.Sh PARAMETERS
l -tag -width Ds t Fa ops A pointer to the driver's
.Xr dev_ops 9S
structure.
t Fa name A pointer to a null-terminated string of ASCII characters that contains
the name of the driver.
.El
.Sh DESCRIPTION
The
.Fn mac_init_ops
and
.Fn mac_fini_ops
functions are used to initialize and finalize support for a device
driver that implements the
.Xr mac 9E
networking device framework.
p
The
.Fn mac_init_ops
function should be called during the driver's
.Xr _init 9E
entry point. As described in more detail in the
.Sx Initializing MAC Support
section of
.Xr mac 9E ,
this must be called before the driver calls
.Xr mod_install 9F .
If this is not done, then the call to
.Xr mac_register 9F
will fail.
p
When in the driver's
.Xr _fini 9E
entry point, after the call to
.Xr mod_remove 9F
has succeeded, then the driver must call the
.Fn mac_fini_ops
function to finalize support and finish releasing any resources. If the
call to
.Xr mod_remove 9F
fails, then the device driver should not call
.Fn mac_fini_ops
and should fail the call to
.Xr _fini 9F .
p
In addition, if the call to
.Xr mod_install 9F
in the driver's
.Xr _init 9E
entry point fails, then the driver should also call
.Xr mac_fini_ops 9F .
See the example below for how this should be structured.
.Sh CONTEXT
The
.Fn mac_init_ops
function should only ever be called from the context of a driver's
.Xr _init 9E
entry point.
p
The
.Fn mac_fini_ops
function should only ever be called from the context of a driver's
.Xr _init 9E
or
.Xr _fini 9E
entry point.
.Sh RETURN VALUES
The
.Fn mac_init_ops
and
.Fn mac_fini_ops
functions will always succeed. They do not have any kind of return
value.
.Sh EXAMPLES
The following example shows how a driver would call
.Xr mac_init_ops 9F
and
.Xr mac_fini_ops 9F
correctly in the
.Xr _init 9E
and
.Xr _fini 9E
entry points of a driver.
d -literal #include <sys/modctl.h>
#include <sys/ddi.h>
#include <sys/sunddi.h>
#include <sys/mac_provider.h>

/*
 * When using this, replace mydrv with the name of the actual device
 * driver. In addition, the mydrv_ prefix that is used should be
 * replaced with the name of the device driver
 */
#define MYDRV_NAME "mydrv"

/*
 * The following dev_ops structure would need to be filled in by a
 * proper device driver.
 */
static struct dev_ops mydrv_dev_ops;

static struct modldrv mydrv_modldrv = {
 &mod_driverops,
 MYDRV_NAME,
 &mydrv_dev_ops
};

static struct modlinkage mydrv_modlinkage = {
 MODREV_1,
 &mydrv_modldrv,
 NULL
};

int
_init(void)
{
 int ret;

 /* Perform other needed initialization */

 mac_init_ops(&mydrv_devops, MYDRV_NAME);

 ret = mod_install(&mydrv_modlinkage);
 if (ret != DDI_SUCCESS) {
 mac_fini_ops(&mydrv_devops);
 /* Perform other needed finalization */
 }

 return (ret);
}

int
_info(struct modinfo *modinfop)
{
 return (mod_info(&mydrv_modlinkage, modinfo));
}

int
_fini(void)
{
 int ret;

 ret = mod_remove(&mydrv_modlinkage);
 if (ret == DDI_SUCCESS) {
 mac_fini_ops(&mydrv_devops);
 /* Perform other needed finalization */
 }

 return (ret);
}
.Ed
.Sh SEE ALSO
.Xr _fini 9E ,
.Xr _init 9E ,
.Xr mac 9E ,
.Xr mod_install 9F ,
.Xr mod_remove 9F ,
.Xr dev_ops 9S