usr/src/cmd/rcm_daemon/common/cluster_rcm.c

   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
  55 static int              cluster_register(rcm_handle_t *);
  56 static int              cluster_unregister(rcm_handle_t *);
  57 static int              cluster_getinfo(rcm_handle_t *, char *, id_t, uint_t,
  58                             char **, char **, nvlist_t *, rcm_info_t **);
  59 static int              cluster_suspend(rcm_handle_t *, char *, id_t,
  60                             timespec_t *, uint_t, char **, rcm_info_t **);
  61 static int              cluster_resume(rcm_handle_t *, char *, id_t, uint_t,
  62                             char **, rcm_info_t **);
  63 static int              cluster_offline(rcm_handle_t *, char *, id_t, uint_t,
  64                             char **, rcm_info_t **);
  65 static int              cluster_online(rcm_handle_t *, char *, id_t, uint_t,
  66                             char **, rcm_info_t **);
  67 static int              cluster_remove(rcm_handle_t *, char *, id_t, uint_t,
  68                             char **, rcm_info_t **);
  69
  70 static int              cluster_SUNW_os_registered = 0;
  71
  72 static 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
  88 struct rcm_mod_ops *
  89 rcm_mod_init()
  90 {
  91         return (&cluster_ops);
  92 }
  93
  94 const char *
  95 rcm_mod_info()
  96 {
  97         return (gettext("RCM Cluster module 1.3"));
  98 }
  99
 100 int
 101 rcm_mod_fini()
 102 {
 103         return (RCM_SUCCESS);
 104 }
 105
 106 static int
 107 cluster_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
 138 static int
 139 cluster_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*/
 154 static int
 155 cluster_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*/
 168 static int
 169 cluster_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*/
 180 static int
 181 cluster_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*/
 192 static int
 193 cluster_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*/
 203 static int
 204 cluster_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*/
 211 static int
 212 cluster_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 }