xref: /titanic_44/usr/src/lib/libscf/common/highlevel.c (revision a60349c89adffc0902b2353230891d8e7f2b24d9)
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 /*
23  * Copyright 2010 Sun Microsystems, Inc.  All rights reserved.
24  * Use is subject to license terms.
25  */
26 
27 /*
28  * This file contains high level functions used by multiple utilities.
29  */
30 
31 #include "libscf_impl.h"
32 
33 #include <assert.h>
34 #include <libuutil.h>
35 #include <string.h>
36 #include <stdlib.h>
37 #include <sys/systeminfo.h>
38 #include <sys/uadmin.h>
39 #include <sys/utsname.h>
40 
41 #ifdef	__x86
42 #include <smbios.h>
43 
44 /*
45  * Check whether the platform is on the fastreboot_blacklist.
46  * Return 1 if the platform has been blacklisted, 0 otherwise.
47  */
48 static int
49 scf_is_fb_blacklisted(void)
50 {
51 	smbios_hdl_t *shp;
52 	smbios_system_t sys;
53 	smbios_info_t info;
54 
55 	id_t id;
56 	int err;
57 	int i;
58 
59 	scf_simple_prop_t *prop = NULL;
60 	ssize_t numvals;
61 	char *platform_name;
62 
63 	int blacklisted = 0;
64 
65 	/*
66 	 * If there's no SMBIOS, assume it's blacklisted.
67 	 */
68 	if ((shp = smbios_open(NULL, SMB_VERSION, 0, &err)) == NULL)
69 		return (1);
70 
71 	/*
72 	 * If we can't read system info, assume it's blacklisted.
73 	 */
74 	if ((id = smbios_info_system(shp, &sys)) == SMB_ERR ||
75 	    smbios_info_common(shp, id, &info) == SMB_ERR) {
76 		blacklisted = 1;
77 		goto fb_out;
78 	}
79 
80 	/*
81 	 * If we can't read the "platforms" property from property group
82 	 * BOOT_CONFIG_PG_FBBLACKLIST, assume no platforms have
83 	 * been blacklisted.
84 	 */
85 	if ((prop = scf_simple_prop_get(NULL, FMRI_BOOT_CONFIG,
86 	    BOOT_CONFIG_PG_FBBLACKLIST, "platforms")) == NULL)
87 		goto fb_out;
88 
89 	numvals = scf_simple_prop_numvalues(prop);
90 
91 	for (i = 0; i < numvals; i++) {
92 		platform_name = scf_simple_prop_next_astring(prop);
93 		if (platform_name == NULL)
94 			break;
95 		if (strcmp(platform_name, info.smbi_product) == 0) {
96 			blacklisted = 1;
97 			break;
98 		}
99 	}
100 
101 fb_out:
102 	smbios_close(shp);
103 	scf_simple_prop_free(prop);
104 
105 	return (blacklisted);
106 }
107 
108 /*
109  * Add or get a property group given an FMRI.
110  * Return SCF_SUCCESS on success, SCF_FAILED on failure.
111  */
112 static int
113 scf_fmri_pg_get_or_add(const char *fmri, const char *pgname,
114     const char *pgtype, uint32_t pgflags, int add)
115 {
116 	scf_handle_t	*handle = NULL;
117 	scf_instance_t	*inst = NULL;
118 	int		rc = SCF_FAILED;
119 	int		error;
120 
121 	if ((handle = scf_handle_create(SCF_VERSION)) == NULL ||
122 	    scf_handle_bind(handle) != 0 ||
123 	    (inst = scf_instance_create(handle)) == NULL ||
124 	    scf_handle_decode_fmri(handle, fmri, NULL, NULL,
125 	    inst, NULL, NULL, SCF_DECODE_FMRI_EXACT) != SCF_SUCCESS)
126 		goto scferror;
127 
128 	if (add) {
129 		rc = scf_instance_add_pg(inst, pgname, pgtype, pgflags, NULL);
130 		/*
131 		 * If the property group already exists, return SCF_SUCCESS.
132 		 */
133 		if (rc != SCF_SUCCESS && scf_error() == SCF_ERROR_EXISTS)
134 			rc = SCF_SUCCESS;
135 	} else {
136 		rc = scf_instance_get_pg(inst, pgname, NULL);
137 	}
138 
139 scferror:
140 	if (rc != SCF_SUCCESS)
141 		error = scf_error();
142 
143 	scf_instance_destroy(inst);
144 	if (handle)
145 		(void) scf_handle_unbind(handle);
146 	scf_handle_destroy(handle);
147 
148 	if (rc != SCF_SUCCESS)
149 		(void) scf_set_error(error);
150 
151 	return (rc);
152 }
153 #endif	/* __x86 */
154 
155 /*
156  * Get config properties from svc:/system/boot-config:default.
157  * It prints errors with uu_warn().
158  */
159 void
160 scf_get_boot_config(uint8_t *boot_config)
161 {
162 	uint64_t ret = 0;
163 
164 	assert(boot_config);
165 	*boot_config = 0;
166 
167 	{
168 		/*
169 		 * Property vector for BOOT_CONFIG_PG_PARAMS property group.
170 		 */
171 		scf_propvec_t ua_boot_config[] = {
172 			{ FASTREBOOT_DEFAULT, NULL, SCF_TYPE_BOOLEAN, NULL,
173 			    UA_FASTREBOOT_DEFAULT },
174 			{ FASTREBOOT_ONPANIC, NULL, SCF_TYPE_BOOLEAN, NULL,
175 			    UA_FASTREBOOT_ONPANIC },
176 			{ NULL }
177 		};
178 		scf_propvec_t	*prop;
179 
180 		for (prop = ua_boot_config; prop->pv_prop != NULL; prop++)
181 			prop->pv_ptr = &ret;
182 		prop = NULL;
183 		if (scf_read_propvec(FMRI_BOOT_CONFIG, BOOT_CONFIG_PG_PARAMS,
184 		    B_TRUE, ua_boot_config, &prop) != SCF_FAILED) {
185 
186 #ifdef	__x86
187 			/*
188 			 * Unset both flags if the platform has been
189 			 * blacklisted.
190 			 */
191 			if (scf_is_fb_blacklisted())
192 				return;
193 #endif	/* __x86 */
194 			*boot_config = (uint8_t)ret;
195 			return;
196 		}
197 #if defined(FASTREBOOT_DEBUG)
198 		if (prop != NULL) {
199 			(void) uu_warn("Service %s property '%s/%s' "
200 			    "not found.\n", FMRI_BOOT_CONFIG,
201 			    BOOT_CONFIG_PG_PARAMS, prop->pv_prop);
202 		} else {
203 			(void) uu_warn("Unable to read service %s "
204 			    "property '%s': %s\n", FMRI_BOOT_CONFIG,
205 			    BOOT_CONFIG_PG_PARAMS, scf_strerror(scf_error()));
206 		}
207 #endif	/* FASTREBOOT_DEBUG */
208 	}
209 }
210 
211 /*
212  * Get or set properties in non-persistent "config_ovr" property group
213  * in svc:/system/boot-config:default.
214  * It prints errors with uu_warn().
215  */
216 /*ARGSUSED*/
217 static int
218 scf_getset_boot_config_ovr(int set, uint8_t *boot_config_ovr)
219 {
220 	int rc = SCF_SUCCESS;
221 
222 	assert(boot_config_ovr);
223 
224 #ifndef	__x86
225 	return (rc);
226 #else
227 	{
228 		/*
229 		 * Property vector for BOOT_CONFIG_PG_OVR property group.
230 		 */
231 		scf_propvec_t ua_boot_config_ovr[] = {
232 			{ FASTREBOOT_DEFAULT, NULL, SCF_TYPE_BOOLEAN, NULL,
233 			    UA_FASTREBOOT_DEFAULT },
234 			{ FASTREBOOT_ONPANIC, NULL, SCF_TYPE_BOOLEAN, NULL,
235 			    UA_FASTREBOOT_ONPANIC },
236 			{ NULL }
237 		};
238 		scf_propvec_t	*prop;
239 
240 		rc = scf_fmri_pg_get_or_add(FMRI_BOOT_CONFIG,
241 		    BOOT_CONFIG_PG_OVR, SCF_GROUP_APPLICATION,
242 		    SCF_PG_FLAG_NONPERSISTENT, set);
243 
244 		if (rc != SCF_SUCCESS) {
245 #if defined(FASTREBOOT_DEBUG)
246 			if (set)
247 				(void) uu_warn("Unable to add service %s "
248 				    "property group '%s'\n",
249 				    FMRI_BOOT_CONFIG, BOOT_CONFIG_PG_OVR);
250 #endif	/* FASTREBOOT_DEBUG */
251 			return (rc);
252 		}
253 
254 		for (prop = ua_boot_config_ovr; prop->pv_prop != NULL; prop++)
255 			prop->pv_ptr = boot_config_ovr;
256 		prop = NULL;
257 
258 		if (set)
259 			rc = scf_write_propvec(FMRI_BOOT_CONFIG,
260 			    BOOT_CONFIG_PG_OVR, ua_boot_config_ovr, &prop);
261 		else
262 			rc = scf_read_propvec(FMRI_BOOT_CONFIG,
263 			    BOOT_CONFIG_PG_OVR, B_FALSE, ua_boot_config_ovr,
264 			    &prop);
265 
266 #if defined(FASTREBOOT_DEBUG)
267 		if (rc != SCF_SUCCESS) {
268 			if (prop != NULL) {
269 				(void) uu_warn("Service %s property '%s/%s' "
270 				    "not found.\n", FMRI_BOOT_CONFIG,
271 				    BOOT_CONFIG_PG_OVR, prop->pv_prop);
272 			} else {
273 				(void) uu_warn("Unable to %s service %s "
274 				    "property '%s': %s\n", set ? "set" : "get",
275 				    FMRI_BOOT_CONFIG, BOOT_CONFIG_PG_OVR,
276 				    scf_strerror(scf_error()));
277 			}
278 		}
279 #endif	/* FASTREBOOT_DEBUG */
280 
281 		if (set)
282 			(void) smf_refresh_instance(FMRI_BOOT_CONFIG);
283 
284 		return (rc);
285 
286 	}
287 #endif	/* __x86 */
288 }
289 
290 /*
291  * Get values of properties in non-persistent "config_ovr" property group.
292  */
293 void
294 scf_get_boot_config_ovr(uint8_t *boot_config_ovr)
295 {
296 	(void) scf_getset_boot_config_ovr(B_FALSE, boot_config_ovr);
297 }
298 
299 /*
300  * Set value of "config_ovr/fastreboot_default".
301  */
302 int
303 scf_fastreboot_default_set_transient(boolean_t value)
304 {
305 	uint8_t	boot_config_ovr = 0;
306 
307 	if (value == B_TRUE)
308 		boot_config_ovr = UA_FASTREBOOT_DEFAULT | UA_FASTREBOOT_ONPANIC;
309 
310 	return (scf_getset_boot_config_ovr(B_TRUE, &boot_config_ovr));
311 }
312 
313 /*
314  * Check whether Fast Reboot is the default operating mode.
315  * Return 0 if
316  *   1. the platform is xVM
317  * or
318  *   2. svc:/system/boot-config:default service doesn't exist,
319  * or
320  *   3. property "config/fastreboot_default" doesn't exist,
321  * or
322  *   4. value of property "config/fastreboot_default" is set to "false"
323  *      and "config_ovr/fastreboot_default" is not set to "true",
324  * or
325  *   5. the platform has been blacklisted.
326  * or
327  *   6. value of property "config_ovr/fastreboot_default" is set to "false".
328  * Return non-zero otherwise.
329  */
330 int
331 scf_is_fastboot_default(void)
332 {
333 	uint8_t	boot_config = 0, boot_config_ovr;
334 	char procbuf[SYS_NMLN];
335 
336 	/*
337 	 * If we are on xVM, do not fast reboot by default.
338 	 */
339 	if (sysinfo(SI_PLATFORM, procbuf, sizeof (procbuf)) == -1 ||
340 	    strcmp(procbuf, "i86xpv") == 0)
341 		return (0);
342 
343 	/*
344 	 * Get property values from "config" property group
345 	 */
346 	scf_get_boot_config(&boot_config);
347 
348 	/*
349 	 * Get property values from non-persistent "config_ovr" property group
350 	 */
351 	boot_config_ovr = boot_config;
352 	scf_get_boot_config_ovr(&boot_config_ovr);
353 
354 	return (boot_config & boot_config_ovr & UA_FASTREBOOT_DEFAULT);
355 }
356