net_kstat_create(9F)					   Kernel Functions for Drivers 				      net_kstat_create(9F)

NAME

       net_kstat_create - create and initialize a new kstat for a specific instance of IP

SYNOPSIS

       #include <sys/types.h>
       #include <sys/kstat.h>
       #include <sys/neti.h>

       kstat_t *net_kstat_create(netid_t netid, char *module,
	    int instance, char *name, char *class, uchar_type type,
	    ulong_t ndata, uchar_t ks_flag);

INTERFACE LEVEL

       Solaris DDI specific (Solaris DDI).

PARAMETERS

       netid	   IP instance identifier.

       module	   The name of the provider's module (such as "sd", "esp", ...). The "core" kernel uses the name "unix".

       instance    The provider's instance number, as from ddi_get_instance(9F). Modules which do not have a meaningful instance number should use
		   0.

       name	   A pointer to a string that uniquely identifies this structure. Only KSTAT_STRLEN - 1 characters are significant.

       class	   The general class that this kstat belongs to. The following classes are currently in use: disk, tape, net, controller, vm, kvm,
		   hat, streams, kstat, and misc.

       type	   The type of kstat to allocate. Valid types are:

		   KSTAT_TYPE_NAMED

		       Allows more than one data record per kstat.

		   KSTAT_TYPE_INTR

		       Interrupt; only one data record per kstat.

		   KSTAT_TYPE_IO

		       I/O; only one data record per kstat

       ndata	   The number of type-specific data records to allocate.

       ks_flag	   A bit-field of various flags for this kstat. ks_flag is some combination of:

		   KSTAT_FLAG_VIRTUAL

		       Tells  kstat_create()  not to allocate memory for the kstat data section; instead, the driver will set the ks_data field to
		       point to the data it wishes to export. This provides a convenient way to export existing data structures.

		   KSTAT_FLAG_WRITABLE

		       Makes the kstat data section writable by root.

		   KSTAT_FLAG_PERSISTENT

		       Indicates that this kstat is to be persistent over time. For persistent kstats, kstat_delete(9F) simply marks the kstat	as
		       dormant; a subsequent kstat_create() reactivates the kstat. This feature is provided so that statistics are not lost across
		       driver close/open (such as raw disk I/O on a disk with no mounted partitions.) Note: Persistent kstats cannot  be  virtual,
		       since ks_data points to garbage as soon as the driver goes away.

DESCRIPTION

       The  net_kstat_create()	function  allocates  and initializes a kstat(9S) structure. See kstat_create(9F) for a complete discussion of this
       function.

RETURN VALUES

       If successful, net_kstat_create() returns a pointer to the allocated kstat. NULL is returned upon failure.

CONTEXT

       The net_kstat_create() function may be called from user or kernel context.

ATTRIBUTES

       See attributes(5) for descriptions of the following attributes:

       +-----------------------------+-----------------------------+
       |      ATTRIBUTE TYPE	     |	    ATTRIBUTE VALUE	   |
       +-----------------------------+-----------------------------+
       |Availability		     |SUNWcsu			   |
       +-----------------------------+-----------------------------+
       |Interface Stability	     |Committed 		   |
       +-----------------------------+-----------------------------+

SEE ALSO

       ddi_get_instance(9F), kstat_create(9F), kstat_delete(9F), net_kstat_delete(9F), hook_t(9S), kstat_named(9S)

SunOS 5.11							    1 May 2008						      net_kstat_create(9F)