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(7) for descriptions of the following
attributes:
| ATTRIBUTE
TYPE |
ATTRIBUTE VALUE |
| Interface Stability |
Committed |