xref: /illumos-gate/usr/src/man/man9f/net_kstat_create.9f (revision 533affcbc7fc4d0c8132976ea454aaa715fe2307) 
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 When distributing Covered Code, include this CDDL HEADER in each file and include the License file at usr/src/OPENSOLARIS.LICENSE. If applicable, add the following below this CDDL HEADER, with the fields enclosed by brackets "[]" replaced with your own identifying information: Portions Copyright [yyyy] [name of copyright owner]
 NET_KSTAT_CREATE 9F "May 1, 2008"
 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
illumos DDI specific (illumos 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(7) for descriptions of the following attributes:






ATTRIBUTE TYPE ATTRIBUTE VALUE
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)