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8322 nl: misleading-indentation
[unleashed/tickless.git] / usr / src / cmd / modload / update_drv.c
blob3d8aedbfdf264072dcaa567937c076b55d77dccb
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 2009 Sun Microsystems, Inc. All rights reserved.
23 * Use is subject to license terms.
24 */
25
26 #include <stdio.h>
27 #include <locale.h>
28 #include <stdlib.h>
29 #include <unistd.h>
30 #include <sys/types.h>
31 #include <string.h>
32 #include "addrem.h"
33 #include "errmsg.h"
34 #include "plcysubr.h"
35
36 /* function prototypes */
37 static void usage();
38 static int unload_drv(char *, int, int);
39
40
41 /*
42 * try to modunload driver.
43 * return -1 on failure and 0 on success
44 */
45 static int
46 unload_drv(char *driver_name, int force_flag, int verbose_flag)
47 {
48 int modid;
49
50 get_modid(driver_name, &modid);
51 if (modid != -1) {
52 if (modctl(MODUNLOAD, modid) < 0) {
53 (void) fprintf(stderr, gettext(ERR_MODUN), driver_name);
54 if (force_flag == 0) { /* no force flag */
55 if (verbose_flag) {
56 (void) fprintf(stderr,
57 gettext(NOUPDATE), driver_name);
58 }
59 /* clean up and exit. remove lock file */
60 err_exit();
61 }
62 (void) fprintf(stderr, gettext(FORCE_UPDATE),
63 driver_name);
64
65 return (-1);
66 }
67 }
68
69 return (0);
70 }
71
72
73 static void
74 usage()
75 {
76 (void) fprintf(stderr, gettext(UPD_DRV_USAGE));
77 exit(1);
78 }
79
80
81 int
82 main(int argc, char *argv[])
83 {
84 int error, opt, major;
85 int cleanup_flag = 0;
86 int update_conf = 1; /* reload driver.conf by default */
87 int verbose_flag = 0; /* -v option */
88 int force_flag = 0; /* -f option */
89 int a_flag = 0; /* -a option */
90 int d_flag = 0; /* -d option */
91 int i_flag = 0; /* -i option */
92 int l_flag = 0; /* -l option */
93 int m_flag = 0; /* -m option */
94 int n_flag = 0; /* -n option */
95 char *perms = NULL;
96 char *aliases = NULL;
97 char *basedir = NULL;
98 char *policy = NULL;
99 char *aliases2 = NULL;
100 char *priv = NULL;
101 char *driver_name;
102 int found;
103 major_t major_num;
104 int rval;
105 int config_flags;
106
107 (void) setlocale(LC_ALL, "");
108 #if !defined(TEXT_DOMAIN) /* Should be defined by cc -D */
109 #define TEXT_DOMAIN "SYS_TEST" /* Use this only if it weren't */
110 #endif
111 (void) textdomain(TEXT_DOMAIN);
112
113 /* must be run by root */
114 if (getuid() != 0) {
115 (void) fprintf(stderr, gettext(ERR_NOT_ROOT));
116 exit(1);
117 }
118
119 while ((opt = getopt(argc, argv, "m:ni:b:p:adlfuvP:")) != EOF) {
120 switch (opt) {
121 case 'a':
122 a_flag++;
123 break;
124 case 'b':
125 update_conf = 0; /* don't update .conf file */
126 basedir = optarg;
127 break;
128 case 'd':
129 d_flag++;
130 break;
131 case 'f':
132 force_flag++;
133 break;
134 case 'i':
135 i_flag++;
136 aliases = optarg;
137 if (check_space_within_quote(aliases) == ERROR) {
138 (void) fprintf(stderr, gettext(ERR_NO_SPACE),
139 aliases);
140 exit(1);
141 }
142 break;
143 case 'l': /* private option */
144 l_flag++;
145 break;
146 case 'm':
147 m_flag++;
148 perms = optarg;
149 break;
150 case 'n':
151 n_flag++;
152 update_conf = 0;
153 break;
154 case 'p':
155 policy = optarg;
156 break;
157 case 'v':
158 verbose_flag++;
159 break;
160 case 'P':
161 priv = optarg;
162 break;
163 case '?' :
164 default:
165 usage();
166 }
167 }
168
169 /*
170 * check for flags and extra args
171 */
172 if ((argv[optind] == NULL) || (optind + 1 != argc)) {
173 usage();
174 }
175
176 /*
177 * - cannot be adding and removing at the same time
178 * - if -a or -d is specified, it's an error if none of
179 * -i/-m/-p/-P is specified.
180 */
181 if ((a_flag && d_flag) ||
182 ((a_flag || d_flag) &&
183 !m_flag && !i_flag && priv == NULL && policy == NULL)) {
184 usage();
185 }
186
187 /*
188 * - with -d option or -a option either -i 'identify_name',
189 * -m 'permission', -p 'policy' or -P 'priv' should be specified
190 */
191 if (m_flag || i_flag || policy != NULL || priv != NULL) {
192 if (!(a_flag || d_flag))
193 usage();
194 }
195
196 driver_name = argv[optind];
197
198 /* set up update_drv filenames */
199 if ((build_filenames(basedir)) == ERROR) {
200 exit(1);
201 }
202
203 /* no lock is needed for listing minor perm entry */
204 if (l_flag) {
205 list_entry(minor_perm, driver_name, ":");
206
207 return (NOERR);
208 }
209
210 /* must be only running version of add_drv/update_drv/rem_drv */
211 enter_lock();
212
213 if ((check_perms_aliases(m_flag, i_flag)) == ERROR) {
214 err_exit();
215 }
216
217 /* update_drv doesn't modify /etc/name_to_major file */
218 if ((check_name_to_major(R_OK)) == ERROR)
219 err_exit();
220
221 if ((n_flag == 0) &&
222 (basedir == NULL || (strcmp(basedir, "/") == 0)) &&
223 (priv != NULL) && check_priv_entry(priv, a_flag) != 0)
224 err_exit();
225
226 if (policy != NULL && (policy = check_plcy_entry(policy, driver_name,
227 d_flag ? B_TRUE : B_FALSE)) == NULL)
228 err_exit();
229
230 /*
231 * ADD: -a option
232 * i_flag: update /etc/driver_aliases
233 * m_flag: update /etc/minor_perm
234 * -p: update /etc/security/device_policy
235 * -P: update /etc/security/extra_privs
236 * if force_flag is specified continue w/ the next operation
237 */
238 if (a_flag) {
239 if (m_flag) {
240 /* check if the permissions are valid */
241 if ((error = check_perm_opts(perms)) == ERROR) {
242 if (force_flag == 0) { /* no force flag */
243 exit_unlock();
244 return (error);
245 }
246 }
247
248 /*
249 * update the file, if and only if
250 * we didn't run into error earlier.
251 */
252 if ((error != ERROR) &&
253 (error = update_minor_entry(driver_name, perms))) {
254 if (force_flag == 0) { /* no force flag */
255 exit_unlock();
256 return (error);
257 }
258 }
259 cleanup_flag |= CLEAN_NAM_MAJ;
260
261 /*
262 * Notify running system of minor perm change
263 */
264 if ((n_flag == 0) &&
265 (basedir == NULL || (strcmp(basedir, "/") == 0))) {
266 rval = devfs_add_minor_perm(driver_name,
267 log_minorperm_error);
268 if (rval) {
269 (void) fprintf(stderr,
270 gettext(ERR_UPDATE_PERM),
271 driver_name);
272 }
273 }
274 }
275
276 if (priv != NULL) {
277 (void) append_to_file(driver_name, priv, extra_privs,
278 ',', ":", 0);
279 cleanup_flag |= CLEAN_DRV_PRIV;
280 }
281
282 if (policy != NULL) {
283 if ((error = update_device_policy(device_policy,
284 policy, B_TRUE)) != 0) {
285 exit_unlock();
286 return (error);
287 }
288 cleanup_flag |= CLEAN_DEV_POLICY;
289 }
290
291 if (i_flag) {
292 found = get_major_no(driver_name, name_to_major);
293 if (found == ERROR) {
294 (void) fprintf(stderr, gettext(ERR_MAX_MAJOR),
295 name_to_major);
296 err_exit();
297 }
298
299 if (found == UNIQUE) {
300 (void) fprintf(stderr,
301 gettext(ERR_NOT_INSTALLED), driver_name);
302 err_exit();
303 }
304
305 major_num = (major_t)found;
306
307 /*
308 * To ease the nuisance of using update_drv
309 * in packaging scripts, do not require that
310 * existing driver aliases be trimmed from
311 * the command line. If an invocation asks
312 * to add an alias and it's already there,
313 * drive on. We implement this by removing
314 * duplicates now and add the remainder.
315 */
316 error = trim_duplicate_aliases(driver_name,
317 aliases, &aliases2);
318 if (error == ERROR) {
319 exit_unlock();
320 return (error);
321 }
322
323 /*
324 * if the list of aliases to be added is
325 * now empty, we're done.
326 */
327 if (aliases2 == NULL)
328 goto done;
329
330 /*
331 * unless force_flag is specified check that
332 * path-oriented aliases we are adding exist
333 */
334 if ((force_flag == 0) && ((error =
335 aliases_paths_exist(aliases2)) == ERROR)) {
336 exit_unlock();
337 return (error);
338 }
339
340 /* update the file */
341 if ((error = update_driver_aliases(driver_name,
342 aliases2)) == ERROR) {
343 exit_unlock();
344 return (error);
345 }
346
347
348 /* optionally update the running system - not -b */
349 if (update_conf) {
350 /* paranoia - if we crash whilst configuring */
351 sync();
352 config_flags = (verbose_flag) ?
353 CONFIG_DRV_VERBOSE : 0;
354 cleanup_flag |= CLEAN_DRV_ALIAS;
355 if (config_driver(driver_name, major_num,
356 aliases2, NULL, cleanup_flag,
357 config_flags) == ERROR) {
358 err_exit();
359 }
360 }
361
362 }
363
364 done:
365 if (update_conf && (i_flag || policy != NULL)) {
366 /* load the driver */
367 load_driver(driver_name, verbose_flag);
368 }
369
370 exit_unlock();
371
372 return (0);
373 }
374
375
376 /*
377 * DELETE: -d option
378 * i_flag: update /etc/driver_aliases
379 * m_flag: update /etc/minor_perm
380 * -p: update /etc/security/device_policy
381 * -P: update /etc/security/extra_privs
382 * if force_flag is specified continue w/ the next operation
383 */
384 if (d_flag) {
385 int err = NOERR;
386
387 if (m_flag) {
388 /*
389 * On a running system, we first need to
390 * remove devfs's idea of the minor perms.
391 * We don't have any ability to do this singly
392 * at this point.
393 */
394 if ((n_flag == 0) &&
395 (basedir == NULL || (strcmp(basedir, "/") == 0))) {
396 rval = devfs_rm_minor_perm(driver_name,
397 log_minorperm_error);
398 if (rval) {
399 (void) fprintf(stderr,
400 gettext(ERR_UPDATE_PERM),
401 driver_name);
402 }
403 }
404
405 if ((error = delete_entry(minor_perm,
406 driver_name, ":", perms)) != NOERR) {
407 (void) fprintf(stderr, gettext(ERR_NO_ENTRY),
408 driver_name, minor_perm);
409 err = error;
410 }
411 /*
412 * Notify running system of new minor perm state
413 */
414 if ((n_flag == 0) &&
415 (basedir == NULL || (strcmp(basedir, "/") == 0))) {
416 rval = devfs_add_minor_perm(driver_name,
417 log_minorperm_error);
418 if (rval) {
419 (void) fprintf(stderr,
420 gettext(ERR_UPDATE_PERM),
421 driver_name);
422 }
423 }
424 }
425
426 if (i_flag) {
427 found = get_major_no(driver_name, name_to_major);
428 if (found == ERROR) {
429 (void) fprintf(stderr, gettext(ERR_MAX_MAJOR),
430 name_to_major);
431 err_exit();
432 }
433
434 if (found == UNIQUE) {
435 (void) fprintf(stderr,
436 gettext(ERR_NOT_INSTALLED), driver_name);
437 err_exit();
438 }
439
440 major_num = (major_t)found;
441
442 /*
443 * verify that the aliases to be deleted exist
444 * before removal. With -f, failing to
445 * remove an alias is not an error so we
446 * can continue on to update the kernel.
447 */
448 error = NOERR;
449 rval = aliases_exist(aliases);
450 if (rval == ERROR && (force_flag == 0)) {
451 (void) fprintf(stderr,
452 gettext(ERR_ALIAS_NOT_BOUND),
453 driver_name);
454 if (err != NOERR)
455 err = rval;
456 }
457 if (rval == NOERR)
458 error = delete_entry(driver_aliases,
459 driver_name, ":", aliases);
460 if (error != NOERR && (force_flag == 0)) {
461 (void) fprintf(stderr, gettext(ERR_NO_ENTRY),
462 driver_name, driver_aliases);
463 if (err != NOERR)
464 err = error;
465 }
466
467 /*
468 * optionally update the running system - not -b.
469 * Unless -f is specified, error if one or more
470 * devices remain bound to the alias.
471 */
472 if (err == NOERR && update_conf) {
473 /* paranoia - if we crash whilst configuring */
474 sync();
475
476 config_flags = 0;
477 if (verbose_flag)
478 config_flags |= CONFIG_DRV_VERBOSE;
479 if (force_flag)
480 config_flags |= CONFIG_DRV_FORCE;
481 error = unconfig_driver(driver_name, major_num,
482 aliases, config_flags);
483 if (error == ERROR && force_flag == 0) {
484 (void) fprintf(stderr,
485 gettext(ERR_DEV_IN_USE),
486 driver_name);
487 if (err != NOERR)
488 err = error;
489 }
490 }
491 }
492
493 if (priv != NULL) {
494 if ((error = delete_entry(extra_privs, driver_name, ":",
495 priv)) != NOERR) {
496 (void) fprintf(stderr, gettext(ERR_NO_ENTRY),
497 driver_name, extra_privs);
498 if (err != NOERR)
499 err = error;
500 }
501 }
502
503 if (policy != NULL) {
504 if ((error = delete_plcy_entry(device_policy,
505 policy)) != NOERR) {
506 (void) fprintf(stderr, gettext(ERR_NO_ENTRY),
507 driver_name, device_policy);
508 if (err != NOERR)
509 err = error;
510 }
511 }
512
513 if (err == NOERR && update_conf) {
514 if (i_flag || m_flag) {
515 /* try to unload the driver */
516 (void) unload_drv(driver_name,
517 force_flag, verbose_flag);
518 }
519 /* reload the policy */
520 if (policy != NULL)
521 load_driver(driver_name, verbose_flag);
522 }
523 exit_unlock();
524
525 return (err);
526 }
527
528 /* driver name must exist (for update_conf stuff) */
529 major = get_major_no(driver_name, name_to_major);
530 if (major == ERROR) {
531 err_exit();
532 }
533
534 /*
535 * Update driver.conf file:
536 * First try to unload driver module. If it fails, there may
537 * be attached devices using the old driver.conf properties,
538 * so we cannot safely update driver.conf
539 *
540 * The user may specify -f to force a driver.conf update.
541 * In this case, we will update driver.conf cache. All attached
542 * devices still reference old driver.conf properties, including
543 * driver global properties. Devices attached in the future will
544 * referent properties in the updated driver.conf file.
545 */
546 if (update_conf) {
547 (void) unload_drv(driver_name, force_flag, verbose_flag);
548
549 if ((modctl(MODUNLOADDRVCONF, major) != 0) ||
550 (modctl(MODLOADDRVCONF, major, 0) != 0)) {
551 (void) fprintf(stderr, gettext(ERR_DRVCONF),
552 driver_name);
553 err_exit();
554 }
555
556 if (verbose_flag) {
557 (void) fprintf(stderr, gettext(DRVCONF_UPDATED),
558 driver_name);
559 }
560 load_driver(driver_name, verbose_flag);
561 }
562
563 exit_unlock();
564
565 return (NOERR);
566 }
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