243 system manual pages should live with the software

Reviewed by: garrett@nexenta.com
Reviewed by: gwr@nexenta.com
Reviewed by: trisk@opensolaris.org
Approved by: gwr@nexenta.com

--HG--
extra : rebase_source : 0c599d0bec0dc8865fbba67721a7a6cd6b1feefb

1 files changed, 243 insertions, 0 deletions

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+'\" te
+.\" Copyright (c) 2006, Sun Microsystems, Inc., All Rights Reserved
+.\" The contents of this file are subject to the terms of the Common Development and Distribution License (the "License").  You may not use this file except in compliance with the License.
+.\" You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE or http://www.opensolaris.org/os/licensing.  See the License for the specific language governing permissions and limitations under the License.
+.\" 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]
+.TH kstat_create 9F "13 Nov 2006" "SunOS 5.11" "Kernel Functions for Drivers"
+.SH NAME
+kstat_create \- create and initialize a new kstat
+.SH SYNOPSIS
+.LP
+.nf
+#include <sys/types.h>
+#include <sys/kstat.h>
+
+
+
+\fBkstat_t *\fR\fBkstat_create\fR(\fBconst char *\fR\fIks_module\fR, \fBint\fR \fIks_instance\fR, 
+     \fBconst char *\fR\fIks_name\fR, \fBconst char *\fR\fIks_class\fR, \fBuchar_t\fR \fIks_type\fR, 
+     \fBulong_t\fR \fIks_ndata\fR, \fBuchar_t\fR \fIks_flag\fR);
+.fi
+
+.SH INTERFACE LEVEL
+.sp
+.LP
+Solaris DDI specific (Solaris DDI)
+.SH PARAMETERS
+.sp
+.ne 2
+.mk
+.na
+\fB\fIks_module\fR\fR
+.ad
+.RS 15n
+.rt  
+The name of the provider's module (such as "\fBsd\fR", "\fBesp\fR", ...). The
+"\fBcore\fR" kernel uses the name "unix".
+.RE
+
+.sp
+.ne 2
+.mk
+.na
+\fB\fIks_instance\fR\fR
+.ad
+.RS 15n
+.rt  
+The provider's instance number, as from \fBddi_get_instance\fR(9F). Modules
+which do not have a meaningful instance number should use \fB0\fR.
+.RE
+
+.sp
+.ne 2
+.mk
+.na
+\fB\fIks_name\fR\fR
+.ad
+.RS 15n
+.rt  
+A pointer to a string that uniquely identifies this structure. Only
+\fBKSTAT_STRLEN \(mi 1\fR characters are significant.
+.RE
+
+.sp
+.ne 2
+.mk
+.na
+\fB\fIks_class\fR\fR
+.ad
+.RS 15n
+.rt  
+The general class that this kstat belongs to. The following classes are
+currently in use: \fBdisk\fR, \fBtape\fR, \fBnet\fR, \fBcontroller\fR,
+\fBvm\fR, \fBkvm\fR, \fBhat\fR, \fBstreams\fR, \fBkstat\fR, and \fBmisc\fR.
+.RE
+
+.sp
+.ne 2
+.mk
+.na
+\fB\fIks_type\fR\fR
+.ad
+.RS 15n
+.rt  
+The type of \fBkstat\fR to allocate. Valid types are:
+.sp
+.ne 2
+.mk
+.na
+\fB\fBKSTAT_TYPE_NAMED\fR\fR
+.ad
+.RS 20n
+.rt  
+Allows more than one data record per \fBkstat\fR.
+.RE
+
+.sp
+.ne 2
+.mk
+.na
+\fB\fBKSTAT_TYPE_INTR\fR\fR
+.ad
+.RS 20n
+.rt  
+Interrupt; only one data record per \fBkstat\fR.
+.RE
+
+.sp
+.ne 2
+.mk
+.na
+\fB\fBKSTAT_TYPE_IO\fR\fR
+.ad
+.RS 20n
+.rt  
+\fBI/O\fR; only one data record per \fBkstat\fR
+.RE
+
+.RE
+
+.sp
+.ne 2
+.mk
+.na
+\fB\fIks_ndata\fR\fR
+.ad
+.RS 15n
+.rt  
+The number of type-specific data records to allocate.
+.RE
+
+.sp
+.ne 2
+.mk
+.na
+\fB\fIks_flag\fR\fR
+.ad
+.RS 15n
+.rt  
+A bit-field of various flags for this \fBkstat\fR. \fIks_flag\fR is some
+combination of:
+.sp
+.ne 2
+.mk
+.na
+\fB\fBKSTAT_FLAG_VIRTUAL\fR\fR
+.ad
+.RS 25n
+.rt  
+Tells \fBkstat_create()\fR not to allocate memory for the \fBkstat\fR data
+section; instead, the driver will set the \fBks_data\fR field to point to the
+data it wishes to export. This provides a convenient way to export existing
+data structures.
+.RE
+
+.sp
+.ne 2
+.mk
+.na
+\fB\fBKSTAT_FLAG_WRITABLE\fR\fR
+.ad
+.RS 25n
+.rt  
+Makes the \fBkstat\fR data section writable by root.
+.RE
+
+.sp
+.ne 2
+.mk
+.na
+\fB\fBKSTAT_FLAG_PERSISTENT\fR\fR
+.ad
+.RS 25n
+.rt  
+Indicates that this \fBkstat\fR is to be persistent over time. For persistent
+\fBkstat\fRs, \fBkstat_delete\fR(9F) simply marks the \fBkstat\fR as dormant; a
+subsequent \fBkstat_create()\fR reactivates the kstat. This feature is provided
+so that statistics are not lost across driver close/open (such as raw disk
+\fBI/O\fR on a disk with no mounted partitions.) Note: Persistent \fBkstat\fRs
+cannot be virtual, since \fBks_data\fR points to garbage as soon as the driver
+goes away.
+.RE
+
+.RE
+
+.SH DESCRIPTION
+.sp
+.LP
+\fBkstat_create()\fR is used in conjunction with \fBkstat_install\fR(9F) to
+allocate and initialize a \fBkstat\fR(9S) structure. The method is generally as
+follows:
+.sp
+.LP
+\fBkstat_create()\fR allocates and performs necessary system initialization of
+a \fBkstat\fR(9S) structure. \fBkstat_create()\fR allocates memory for the
+entire \fBkstat\fR (header plus data), initializes all header fields,
+initializes the data section to all zeroes, assigns a unique kstat \fBID\fR
+(\fBKID\fR), and puts the kstat onto the system's \fBkstat\fR chain. The
+returned kstat is marked invalid because the provider (caller) has not yet had
+a chance to initialize the data section.
+.sp
+.LP
+After a successful call to \fBkstat_create()\fR the driver must perform any
+necessary initialization of the data section (such as setting the name fields
+in a \fBkstat\fR of type \fBKSTAT_TYPE_NAMED\fR). Virtual \fBkstat\fRs must
+have the \fBks_data\fR field set at this time. The provider may also set the
+\fBks_update\fR, \fBks_private\fR, and \fBks_lock\fR fields if necessary.
+.sp
+.LP
+Once the \fBkstat\fR is completely initialized, \fBkstat_install\fR(9F) is used
+to make the \fBkstat\fR accessible to the outside world.
+.SH RETURN VALUES
+.sp
+.LP
+If successful, \fBkstat_create()\fR returns a pointer to the allocated
+\fBkstat\fR. \fINULL\fR is returned upon failure.
+.SH CONTEXT
+.sp
+.LP
+\fBkstat_create()\fR can be called from user or kernel context.
+.SH EXAMPLES
+.LP
+\fBExample 1 \fRAllocating and Initializing a \fBkstat\fR Structure
+.sp
+.in +2
+.nf
+pkstat_t   *ksp;
+   ksp = kstat_create(module, instance, name, class, type, ndata, flags);
+   if (ksp) {
+      /* ... provider initialization, if necessary */
+      kstat_install(ksp);
+   }
+.fi
+.in -2
+
+.SH SEE ALSO
+.sp
+.LP
+\fBkstat\fR(3KSTAT), \fBddi_get_instance\fR(9F), \fBkstat_delete\fR(9F),
+\fBkstat_install\fR(9F), \fBkstat_named_init\fR(9F), \fBkstat\fR(9S),
+\fBkstat_named\fR(9S)
+.sp
+.LP
+\fIWriting Device Drivers\fR