di_walk_minor - traverse libdevinfo minor nodes
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));
arg
Pointer to caller- specific user data.
flag
Specify 0. Reserved for future use.
minor
The minor node visited.
minor_nodetype
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).
node
The device node with which to the minor node is
associated.
root
Root of subtree to visit.
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.
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.
DI_WALK_TERMINATE
Terminate the walk immediately.
The di_walk_minor() function will fail if:
EINVAL
Invalid argument.
See attributes(7) for descriptions of the following attributes:
| ATTRIBUTE
TYPE |
ATTRIBUTE VALUE |
| Interface Stability |
Committed |
| MT-Level |
Safe |
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(7)). The
dlpi_walk(3DLPI) function is the proper function to walk these nodes.