DI_PATH_BUS_ADDR(3DEVINFO) Device Information Library Functions
NAME
di_path_bus_addr, di_path_client_node, di_path_instance,
di_path_node_name, di_path_phci_node, di_path_state - return
libdevinfo path node information
SYNOPSIS
cc [
flag... ]
file...
-ldevinfo [
library... ]
#include <libdevinfo.h>
char *di_path_bus_addr(
di_path_t path);
di_node_t di_path_client_node(
di_path_t path);
int di_path_instance(
di_path_t path);
char *di_path_node_name(
di_path_t path);
di_node_t di_path_phci_node(
di_path_t path);
di_path_state_t di_path_state(
di_path_t path);
PARAMETERS
path The handle to a path node in a
di_init(3DEVINFO) snapshot.
DESCRIPTION
These functions extract information associated with a path node.
RETURN VALUES
The
di_path_bus_addr() function returns a string representing the
pHCI child path node's unit-address. This function is the
di_path_t peer of
di_bus_addr(3DEVINFO).
The
di_path_client_node() function returns the
di_node_t of the
'client' device node associated with the given path node. If the
client device node is not present in the current device tree
snapshot,
DI_NODE_NIL is returned and
errno is set to
ENOTSUP.
The
di_path_node_name() function returns a pointer to a null-
terminated string containing the path node name. This function is the
di_path_t peer of
di_node_name(3DEVINFO).
The
di_path_instance() function returns the instance number
associated with the given path node. A path node instance is
persistent across
attach(9E)/
detach(9E)and device reconfigurations,
but not across reboot. A path node instance is unrelated to a device
node
di_instance(3DEVINFO).
The
di_path_phci_node() function returns the
di_node_t of the pHCI
host adapter associated with the given path node. If the pHCI device
node is not present in the current device tree snapshot,
DI_NODE_NIL is returned and
errno is set to
ENOTSUP.
The
di_path_state() function returns the state of an I/O path. This
function may return one of the following values:
DI_PATH_STATE_ONLINE Identifies that the
path_info node is online and I/O requests can
be routed through this path.
DI_PATH_STATE_OFFLINE Identifies that the
path_info node is in offline state.
DI_PATH_STATE_FAULT Identifies that the
path_info node is in faulted state and not
ready for I/O operations.
DI_PATH_STATE_STANDBY Identifies that the
path_info node is in standby state and not
ready for I/O operations.
ATTRIBUTES
See
attributes(7) for descriptions of the following attributes:
+--------------------+-----------------+
| ATTRIBUTE TYPE | ATTRIBUTE VALUE |
+--------------------+-----------------+
|Interface Stability | Committed |
+--------------------+-----------------+
|MT-Level | Safe |
+--------------------+-----------------+
SEE ALSO
di_bus_addr(3DEVINFO),
di_devfs_path(3DEVINFO),
di_init(3DEVINFO),
di_instance(3DEVINFO),
di_node_name(3DEVINFO),
di_path_client_next_path(3DEVINFO),
di_path_prop_bytes(3DEVINFO),
di_path_prop_lookup_bytes(3DEVINFO),
di_path_prop_next(3DEVINFO),
libdevinfo(3LIB),
attributes(7) Writing Device Drivers February 21, 2023 DI_PATH_BUS_ADDR(3DEVINFO)
