corectl.c (7c478bd95313f5f23a4c958a745db2134aa03244) corectl.c (3f2f09c1efd66f6d2995998ea72c5df8c70c9a97)
1/*
2 * CDDL HEADER START
3 *
4 * The contents of this file are subject to the terms of the
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, Version 1.0 only
6 * (the "License"). You may not use this file except in compliance
7 * with the License.
5 * Common Development and Distribution License (the "License").
6 * You may not use this file except in compliance with the License.
8 *
9 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
10 * or http://www.opensolaris.org/os/licensing.
11 * See the License for the specific language governing permissions
12 * and limitations under the License.
13 *
14 * When distributing Covered Code, include this CDDL HEADER in each
15 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
16 * If applicable, add the following below this CDDL HEADER, with the
17 * fields enclosed by brackets "[]" replaced with your own identifying
18 * information: Portions Copyright [yyyy] [name of copyright owner]
19 *
20 * CDDL HEADER END
21 */
22/*
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/*
23 * Copyright 2004 Sun Microsystems, Inc. All rights reserved.
22 * Copyright 2006 Sun Microsystems, Inc. All rights reserved.
24 * Use is subject to license terms.
25 */
26
27#pragma ident "%Z%%M% %I% %E% SMI"
28
29#include <sys/proc.h>
30#include <sys/systm.h>
31#include <sys/param.h>

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46 * structures. The corectl_content_t structure is fairly straightforward --
47 * the only subtlety is that we only really _need_ the mutex on architectures
48 * on which 64-bit memory operations are not atomic. The corectl_path_t
49 * structure is slightly trickier in that it contains a refstr_t rather than
50 * just a char * string. This is to allow consumers of the data in that
51 * structure (the core dumping sub-system for example) to safely use the
52 * string without holding any locks on it in light of updates.
53 *
23 * Use is subject to license terms.
24 */
25
26#pragma ident "%Z%%M% %I% %E% SMI"
27
28#include <sys/proc.h>
29#include <sys/systm.h>
30#include <sys/param.h>

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45 * structures. The corectl_content_t structure is fairly straightforward --
46 * the only subtlety is that we only really _need_ the mutex on architectures
47 * on which 64-bit memory operations are not atomic. The corectl_path_t
48 * structure is slightly trickier in that it contains a refstr_t rather than
49 * just a char * string. This is to allow consumers of the data in that
50 * structure (the core dumping sub-system for example) to safely use the
51 * string without holding any locks on it in light of updates.
52 *
54 * At system boot, init_core() sets init(1M)'s core file path and content to
55 * the same value as the fields core_default_path and core_default_content
56 * respectively (for the global zone). All subsequent children of init(1M)
57 * reference those same settings. During boot coreadm(1M) is invoked with
58 * the -u option to update the system settings from /etc/coreadm.conf. This
59 * has the effect of also changing the values in core_default_path and
60 * core_default_content which updates the core file settings for all
61 * processes in the zone. Each zone has different default settings; when
62 * processes enter a non-global zone, their core file path and content are
63 * set to the zone's default path and content.
53 * At system and zone boot, init_core() sets init(1M)'s core file path and
54 * content to the same value as the fields core_default_path and
55 * core_default_content respectively (for the global zone). All subsequent
56 * children of init(1M) reference those same settings. During boot coreadm(1M)
57 * is invoked with the -u option to update the system settings from
58 * /etc/coreadm.conf. This has the effect of also changing the values in
59 * core_default_path and core_default_content which updates the core file
60 * settings for all processes in the zone. Each zone has different default
61 * settings; when processes enter a non-global zone, their core file path and
62 * content are set to the zone's default path and content.
64 *
65 * Processes that have their core file settings explicitly overridden using
66 * coreadm(1M) no longer reference core_default_path or core_default_content
67 * so subsequent changes to the default will not affect them.
68 */
69
70zone_key_t core_zone_key;
71

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202 if (cg->core_file != NULL)
203 refstr_rele(cg->core_file);
204 corectl_path_rele(cg->core_default_path);
205 corectl_content_rele(cg->core_default_content);
206 kmem_free(cg, sizeof (*cg));
207}
208
209/*
63 *
64 * Processes that have their core file settings explicitly overridden using
65 * coreadm(1M) no longer reference core_default_path or core_default_content
66 * so subsequent changes to the default will not affect them.
67 */
68
69zone_key_t core_zone_key;
70

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201 if (cg->core_file != NULL)
202 refstr_rele(cg->core_file);
203 corectl_path_rele(cg->core_default_path);
204 corectl_content_rele(cg->core_default_content);
205 kmem_free(cg, sizeof (*cg));
206}
207
208/*
210 * Called once, from icode(), to set init's core file path and content.
209 * Called from start_init_common(), to set init's core file path and content.
211 */
212void
213init_core(void)
214{
215 struct core_globals *cg;
216
210 */
211void
212init_core(void)
213{
214 struct core_globals *cg;
215
217 zone_key_create(&core_zone_key, core_init_zone, NULL, core_free_zone);
216 /*
217 * The first time we hit this, in the global zone, we have to
218 * initialize the zsd key.
219 */
220 if (INGLOBALZONE(curproc)) {
221 zone_key_create(&core_zone_key, core_init_zone, NULL,
222 core_free_zone);
223 }
218
219 /*
220 * zone_key_create will have called core_init_zone for the
221 * global zone, which sets up the default path and content
222 * variables.
223 */
224
225 /*
226 * zone_key_create will have called core_init_zone for the
227 * global zone, which sets up the default path and content
228 * variables.
229 */
224 cg = zone_getspecific(core_zone_key, global_zone);
225 ASSERT(cg != NULL);
230 VERIFY((cg = zone_getspecific(core_zone_key, curproc->p_zone)) != NULL);
226
227 corectl_path_hold(cg->core_default_path);
228 corectl_content_hold(cg->core_default_content);
229
230 curproc->p_corefile = cg->core_default_path;
231 curproc->p_content = cg->core_default_content;
232}
233

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288 mutex_exit(&p->p_lock);
289 }
290 }
291 if (rp == NULL) {
292 if (error == 0 && suword8((void *)arg1, 0))
293 error = EFAULT;
294 } else {
295 error = copyoutstr(refstr_value(rp), (char *)arg1,
231
232 corectl_path_hold(cg->core_default_path);
233 corectl_content_hold(cg->core_default_content);
234
235 curproc->p_corefile = cg->core_default_path;
236 curproc->p_content = cg->core_default_content;
237}
238

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293 mutex_exit(&p->p_lock);
294 }
295 }
296 if (rp == NULL) {
297 if (error == 0 && suword8((void *)arg1, 0))
298 error = EFAULT;
299 } else {
300 error = copyoutstr(refstr_value(rp), (char *)arg1,
296 (size_t)arg2, NULL);
301 (size_t)arg2, NULL);
297 refstr_rele(rp);
298 }
299 break;
300
301 case CC_SET_GLOBAL_PATH:
302 case CC_SET_DEFAULT_PATH:
303 if ((error = secpolicy_coreadm(CRED())) != 0)
304 break;

--- 254 unchanged lines hidden --- 		302 refstr_rele(rp);
303 }
304 break;
305
306 case CC_SET_GLOBAL_PATH:
307 case CC_SET_DEFAULT_PATH:
308 if ((error = secpolicy_coreadm(CRED())) != 0)
309 break;

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