te
Copyright (c) 2009, 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]
flag
minor
minor_nodetype
node
root
DI_WALK_TERMINATE
Copyright (c) 2009, 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]
DI_WALK_MINOR 3DEVINFO "Jan 14, 2009"
NAME
di_walk_minor - traverse libdevinfo minor nodes
SYNOPSIS
cc [ flag... ] file... -ldevinfo [ library... ] #include <libdevinfo.h> int di_walk_minor(di_node_t root, const char *minor_nodetype, uint_t flag, void *arg, int (*minor_callback)(di_node_t node, di_minor_t minor, void *arg));
PARAMETERS
arg
Pointer to caller- specific user data.
Specify 0. Reserved for future use.
The minor node visited.
A character string specifying the minor data type, which may be one of the types defined by the illumos DDI framework, for example, DDI_NT_BLOCK. NULL matches all minor_node types. See ddi_create_minor_node(9F).
The device node with which to the minor node is associated.
Root of subtree to visit.
DESCRIPTION
The di_walk_minor() function visits all minor nodes attached to device
nodes in a subtree rooted at root. For each minor node that matches
minor_nodetype, the caller-supplied function minor_callback() is
invoked. The walk terminates immediately when minor_callback() returns
DI_WALK_TERMINATE.
RETURN VALUES
Upon successful completion, di_walk_minor() returns 0. Otherwise, -1 is
returned and errno is set to indicate the error.
The minor_callback() function returns one of the following: DI_WALK_CONTINUE
Continue to visit subsequent minor data nodes.
Terminate the walk immediately.
ERRORS
The di_walk_minor() function will fail if:
EINVAL
Invalid argument.
ATTRIBUTES
See attributes(5) for descriptions of the following attributes:
| ATTRIBUTE TYPE ATTRIBUTE VALUE |
| Interface Stability Committed |
| MT-Level Safe |
SEE ALSO
dladm(1M), di_minor_nodetype(3DEVINFO), dlpi_walk(3DLPI),
libdevinfo(3LIB), attributes(5), filesystem(5),
ddi_create_minor_node(9F)
Writing Device Drivers
NOTES
The di_walk_minor() function is no longer an accurate method for walking
network datalink interfaces on the system. Applications should use
dlpi_walk(3DLPI) instead. It has been common for applications to use
di_walk_minor() to walk networking devices by passing in a
minor_nodetype of DDI_NT_NET, in most cases to discover the set of
DLPI devices on the system. illumos now makes a layering distinction between
networking devices (the objects displayed in the DEVICE field by
dladm show-phys) and network datalink interfaces (the objects
displayed by dladm show-link). Datalink interfaces are represented
as the set of DLPI device nodes that applications can open by using
dlpi_open(3DLPI) or by opening DLPI nodes out of the /dev/net
filesystem (see filesystem(5)). The dlpi_walk(3DLPI) function is
the proper function to walk these nodes.