1/*
2 * CDDL HEADER START
3 *
4 * The contents of this file are subject to the terms of the
5 * Common Development and Distribution License (the "License").
6 * You may not use this file except in compliance with the License.
7 *
8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9 * or http://www.opensolaris.org/os/licensing.
10 * See the License for the specific language governing permissions
11 * and limitations under the License.
12 *
13 * When distributing Covered Code, include this CDDL HEADER in each
14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15 * If applicable, add the following below this CDDL HEADER, with the
16 * fields enclosed by brackets "[]" replaced with your own identifying
17 * information: Portions Copyright [yyyy] [name of copyright owner]
18 *
19 * CDDL HEADER END
20 */
21/*
22 * Copyright 2008 Sun Microsystems, Inc.  All rights reserved.
23 * Use is subject to license terms.
24 */
25
26#pragma ident	"%Z%%M%	%I%	%E% SMI"
27
28/*
29 * RCM module for managing the OS Quiesce event (SUNW_OS) in a
30 * clustered environment.
31 */
32
33#include <stdlib.h>
34#include <unistd.h>
35#include <fcntl.h>
36#include <string.h>
37#include <thread.h>
38#include <synch.h>
39#include <assert.h>
40#include <errno.h>
41#include <libintl.h>
42#include <sys/param.h>
43#include <sys/wait.h>
44#include <sys/types.h>
45#include <sys/stat.h>
46#include <sys/cladm.h>
47#include "rcm_module.h"
48
49#define	SUNW_OS		"SUNW_OS"
50#define	OS_USAGE	gettext("Sun Cluster")
51#define	OS_SUSPEND_ERR	gettext("OS cannot be quiesced on clustered nodes")
52#define	OS_OFFLINE_ERR	gettext("Invalid operation: OS cannot be offlined")
53#define	OS_REMOVE_ERR	gettext("Invalid operation: OS cannot be removed")
54
55static int		cluster_register(rcm_handle_t *);
56static int		cluster_unregister(rcm_handle_t *);
57static int		cluster_getinfo(rcm_handle_t *, char *, id_t, uint_t,
58			    char **, char **, nvlist_t *, rcm_info_t **);
59static int		cluster_suspend(rcm_handle_t *, char *, id_t,
60			    timespec_t *, uint_t, char **, rcm_info_t **);
61static int		cluster_resume(rcm_handle_t *, char *, id_t, uint_t,
62			    char **, rcm_info_t **);
63static int		cluster_offline(rcm_handle_t *, char *, id_t, uint_t,
64			    char **, rcm_info_t **);
65static int		cluster_online(rcm_handle_t *, char *, id_t, uint_t,
66			    char **, rcm_info_t **);
67static int		cluster_remove(rcm_handle_t *, char *, id_t, uint_t,
68			    char **, rcm_info_t **);
69
70static int		cluster_SUNW_os_registered = 0;
71
72static struct rcm_mod_ops cluster_ops =
73{
74	RCM_MOD_OPS_VERSION,
75	cluster_register,
76	cluster_unregister,
77	cluster_getinfo,
78	cluster_suspend,
79	cluster_resume,
80	cluster_offline,
81	cluster_online,
82	cluster_remove,
83	NULL,
84	NULL,
85	NULL
86};
87
88struct rcm_mod_ops *
89rcm_mod_init()
90{
91	return (&cluster_ops);
92}
93
94const char *
95rcm_mod_info()
96{
97	return (gettext("RCM Cluster module 1.3"));
98}
99
100int
101rcm_mod_fini()
102{
103	return (RCM_SUCCESS);
104}
105
106static int
107cluster_register(rcm_handle_t *hdl)
108{
109	int bootflags;
110
111	if (cluster_SUNW_os_registered)
112		return (RCM_SUCCESS);
113
114	if (_cladm(CL_INITIALIZE, CL_GET_BOOTFLAG, &bootflags) != 0) {
115		rcm_log_message(RCM_ERROR,
116			gettext("unable to check cluster status\n"));
117		return (RCM_FAILURE);
118	}
119
120	/* attempt to determine if we are in cluster mode */
121
122	if (bootflags & CLUSTER_BOOTED) {
123		if (rcm_register_interest(hdl, SUNW_OS, 0, NULL) !=
124		    RCM_SUCCESS) {
125			rcm_log_message(RCM_ERROR,
126			    gettext("failed to register\n"));
127			return (RCM_FAILURE);
128		} else {
129			cluster_SUNW_os_registered = 1;
130			rcm_log_message(RCM_DEBUG, "registered " SUNW_OS
131					"\n");
132		}
133	}
134
135	return (RCM_SUCCESS);
136}
137
138static int
139cluster_unregister(rcm_handle_t *hdl)
140{
141
142	if (cluster_SUNW_os_registered) {
143		if (rcm_unregister_interest(hdl, SUNW_OS, 0) !=
144		    RCM_SUCCESS) {
145			rcm_log_message(RCM_ERROR,
146			    gettext("failed to unregister"));
147		}
148		cluster_SUNW_os_registered = 0;
149	}
150	return (RCM_SUCCESS);
151}
152
153/*ARGSUSED*/
154static int
155cluster_getinfo(rcm_handle_t *hdl, char *rsrcname, id_t id, uint_t flags,
156    char **infostr, char **errstr, nvlist_t *props, rcm_info_t **dependent)
157{
158
159	assert(rsrcname != NULL && infostr != NULL);
160
161	if ((*infostr = strdup(OS_USAGE)) == NULL)
162		rcm_log_message(RCM_ERROR, gettext("strdup failure\n"));
163
164	return (RCM_SUCCESS);
165}
166
167/*ARGSUSED*/
168static int
169cluster_suspend(rcm_handle_t *hdl, char *rsrcname, id_t id,
170    timespec_t *interval, uint_t flags, char **errstr,
171    rcm_info_t **dependent)
172{
173	if ((*errstr = strdup(OS_SUSPEND_ERR)) == NULL)
174		rcm_log_message(RCM_ERROR, gettext("strdup failure\n"));
175
176	return (RCM_FAILURE);
177}
178
179/*ARGSUSED*/
180static int
181cluster_resume(rcm_handle_t *hdl, char *rsrcname, id_t id, uint_t flags,
182    char **errstr, rcm_info_t **dependent)
183{
184	return (RCM_SUCCESS);
185}
186
187/*
188 * By default, reject offline. If offline request is
189 * forced, attempt to relocate the cluster device.
190 */
191/*ARGSUSED*/
192static int
193cluster_offline(rcm_handle_t *hdl, char *rsrcname, id_t id, uint_t flags,
194    char **errstr, rcm_info_t **dependent)
195{
196	if ((*errstr = strdup(OS_OFFLINE_ERR)) == NULL)
197		rcm_log_message(RCM_ERROR, gettext("strdup failure\n"));
198
199	return (RCM_FAILURE);
200}
201
202/*ARGSUSED*/
203static int
204cluster_online(rcm_handle_t *hdl, char *rsrcname, id_t id, uint_t flags,
205    char  **errstr, rcm_info_t **dependent)
206{
207	return (RCM_SUCCESS);
208}
209
210/*ARGSUSED*/
211static int
212cluster_remove(rcm_handle_t *hdl, char *rsrcname, id_t id, uint_t flags,
213    char **errstr, rcm_info_t **dependent)
214{
215	if ((*errstr = strdup(OS_REMOVE_ERR)) == NULL)
216		rcm_log_message(RCM_ERROR, gettext("strdup failure\n"));
217
218	return (RCM_FAILURE);
219}
220