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

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

#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);

illumos DDI specific (illumos DDI).

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.

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

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

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

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

ATTRIBUTE TYPE ATTRIBUTE VALUE
Interface Stability Committed

ddi_get_instance(9F), kstat_create(9F), kstat_delete(9F), net_kstat_delete(9F), hook_t(9S), kstat_named(9S)
May 1, 2008 OmniOS