1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
|
'\" te
.\" Copyright (c) 2008, 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 DI_PATH_CLIENT_NEXT_PATH 3DEVINFO "May 15, 2008"
.SH NAME
di_path_client_next_path, di_path_phci_next_path \- libdevinfo path node
traversal functions
.SH SYNOPSIS
.LP
.nf
\fBcc\fR [ \fIflag\fR... ] \fIfile\fR... \fB-ldevinfo\fR [ \fIlibrary\fR... ]
#include <libdevinfo.h>
\fBdi_path_t\fR \fBdi_path_client_next_path\fR(\fBdi_node_t node\fR \fInode\fR,
\fBdi_path_t\fR \fIpath\fR);
.fi
.LP
.nf
\fBdi_path_t\fR \fBdi_path_phci_next_path\fR(\fBdi_node_t node\fR \fInode\fR,
\fBdi_path_t\fR \fIpath\fR);
.fi
.SH PARAMETERS
.sp
.ne 2
.na
\fB\fInode\fR\fR
.ad
.RS 8n
The handle to a device node in a \fBdi_init\fR(3DEVINFO) snapshot. For
\fBdi_path_client_next_path()\fR, \fInode\fR must be a client device node. For
\fBdi_path_phci_next_path()\fR, \fInode\fR must be a pHCI device node.
.RE
.sp
.ne 2
.na
\fB\fIpath\fR\fR
.ad
.RS 8n
\fBDI_PATH_NIL\fR, or the handle to a path node in a snapshot.
.RE
.SH DESCRIPTION
.sp
.LP
Each path node is an element in a pHCI-client matrix. The matrix is implemented
by dual linked lists: one list links path nodes related to a common client
head, and the other links path nodes related to a common pHCI head.
.sp
.LP
The \fBdi_path_client_next_path()\fR function is called on a
multipathing 'client' device node, where a 'client' is the child of a vHCI device node, and
is associated with a specific endpoint device identity (independent of physical
paths). If the path argument is \fINULL\fR, \fBdi_path_client_next_path()\fR
returns the first path node associated with the client. To walk all path nodes
associated with a client, returned \fBdi_path_t\fR values are fed back into
\fBdi_path_client_next_path()\fR, via the \fIpath\fR argument, until a null
path node is returned. For each path node, \fBdi_path_bus_addr\fR(3DEVINFO)
returns the pHCI child path node unit-address.
.sp
.LP
The \fBdi_path_phci_next_path()\fR function is called on a multipathing pHCI
device node. If the path argument is \fINULL\fR, \fBdi_path_phci_next_path()\fR
returns the first path node associated with the pHCI. To walk all path nodes
associated with a pHCI, returned \fBdi_path_t\fR values are fed back into
\fBdi_path_phci_next_path()\fR, via the \fIpath\fR argument, until a null path
node is returned. For each path node, \fBdi_path_client_node\fR(3DEVINFO)
provides a pointer to the associated client device node.
.sp
.LP
A device node can be a client device node of one multipathing class and a pHCI
device node of another class.
.SH RETURN VALUES
.sp
.LP
Upon successful completion, a handle to the next path node is returned.
Otherwise, \fBDI_PATH_NIL\fR is returned and \fBerrno\fR is set to indicate the
error.
.SH ERRORS
.sp
.LP
These functions will fail if:
.sp
.ne 2
.na
\fB\fBEINVAL\fR\fR
.ad
.RS 11n
One or more argument was invalid.
.RE
.sp
.ne 2
.na
\fB\fBENOTSUP\fR\fR
.ad
.RS 11n
Path node information is not available in the snapshot.
.RE
.sp
.ne 2
.na
\fB\fBENXIO\fR\fR
.ad
.RS 11n
The end of the path node list was reached.
.RE
.SH ATTRIBUTES
.sp
.LP
See \fBattributes\fR(7) for descriptions of the following attributes:
.sp
.sp
.TS
box;
c | c
l | l .
ATTRIBUTE TYPE ATTRIBUTE VALUE
_
Interface Stability Committed
_
MT-Level Safe
.TE
.SH SEE ALSO
.sp
.LP
.BR di_init (3DEVINFO),
.BR di_path_bus_addr (3DEVINFO),
.BR di_path_client_node (3DEVINFO),
.BR libdevinfo (3LIB),
.BR attributes (7)
.sp
.LP
\fIWriting Device Drivers\fR
|
