Annotation of src/sys/kern/kern_module.c, Revision 1.82
1.82 ! pgoyette 1: /* $NetBSD: kern_module.c,v 1.81 2011/09/14 12:29:22 christos Exp $ */
1.1 ad 2:
3: /*-
4: * Copyright (c) 2008 The NetBSD Foundation, Inc.
5: * All rights reserved.
6: *
1.25 ad 7: * This code is derived from software developed for The NetBSD Foundation
8: * by Andrew Doran.
9: *
1.1 ad 10: * Redistribution and use in source and binary forms, with or without
11: * modification, are permitted provided that the following conditions
12: * are met:
13: * 1. Redistributions of source code must retain the above copyright
14: * notice, this list of conditions and the following disclaimer.
15: * 2. Redistributions in binary form must reproduce the above copyright
16: * notice, this list of conditions and the following disclaimer in the
17: * documentation and/or other materials provided with the distribution.
18: *
19: * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
20: * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
21: * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
22: * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
23: * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
24: * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
25: * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
26: * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
27: * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
28: * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
29: * POSSIBILITY OF SUCH DAMAGE.
30: */
31:
32: /*
1.2 ad 33: * Kernel module support.
1.1 ad 34: */
35:
36: #include <sys/cdefs.h>
1.82 ! pgoyette 37: __KERNEL_RCSID(0, "$NetBSD: kern_module.c,v 1.81 2011/09/14 12:29:22 christos Exp $");
1.54 pooka 38:
39: #define _MODULE_INTERNAL
1.30 ad 40:
41: #ifdef _KERNEL_OPT
42: #include "opt_ddb.h"
1.42 apb 43: #include "opt_modular.h"
1.30 ad 44: #endif
1.1 ad 45:
46: #include <sys/param.h>
47: #include <sys/systm.h>
1.26 ad 48: #include <sys/kernel.h>
1.1 ad 49: #include <sys/proc.h>
50: #include <sys/kauth.h>
51: #include <sys/kobj.h>
52: #include <sys/kmem.h>
53: #include <sys/module.h>
1.26 ad 54: #include <sys/kthread.h>
1.34 ad 55: #include <sys/sysctl.h>
1.46 jnemeth 56: #include <sys/lock.h>
1.1 ad 57:
58: #include <uvm/uvm_extern.h>
59:
1.25 ad 60: struct vm_map *module_map;
1.78 mrg 61: char *module_machine;
1.54 pooka 62: char module_base[MODULE_BASE_SIZE];
1.2 ad 63:
1.59 pooka 64: struct modlist module_list = TAILQ_HEAD_INITIALIZER(module_list);
65: struct modlist module_builtins = TAILQ_HEAD_INITIALIZER(module_builtins);
66: static struct modlist module_bootlist = TAILQ_HEAD_INITIALIZER(module_bootlist);
67:
1.12 ad 68: static module_t *module_active;
1.75 martin 69: static bool module_verbose_on;
70: static bool module_autoload_on = true;
1.1 ad 71: u_int module_count;
1.59 pooka 72: u_int module_builtinlist;
1.26 ad 73: u_int module_autotime = 10;
74: u_int module_gen = 1;
75: static kcondvar_t module_thread_cv;
76: static kmutex_t module_thread_lock;
77: static int module_thread_ticks;
1.68 pgoyette 78: int (*module_load_vfs_vec)(const char *, int, bool, module_t *,
79: prop_dictionary_t *) = (void *)eopnotsupp;
1.1 ad 80:
1.51 elad 81: static kauth_listener_t module_listener;
82:
1.1 ad 83: /* Ensure that the kernel's link set isn't empty. */
84: static modinfo_t module_dummy;
85: __link_set_add_rodata(modules, module_dummy);
86:
1.70 pgoyette 87: static module_t *module_newmodule(modsrc_t);
88: static void module_require_force(module_t *);
1.9 jmmv 89: static int module_do_load(const char *, bool, int, prop_dictionary_t,
1.20 ad 90: module_t **, modclass_t class, bool);
1.70 pgoyette 91: static int module_do_unload(const char *, bool);
1.74 pooka 92: static int module_do_builtin(const char *, module_t **, prop_dictionary_t);
1.11 ad 93: static int module_fetch_info(module_t *);
1.26 ad 94: static void module_thread(void *);
1.54 pooka 95:
1.60 pooka 96: static module_t *module_lookup(const char *);
97: static void module_enqueue(module_t *);
98:
1.47 jnemeth 99: static bool module_merge_dicts(prop_dictionary_t, const prop_dictionary_t);
1.1 ad 100:
1.69 pooka 101: static void sysctl_module_setup(void);
102:
1.1 ad 103: /*
104: * module_error:
105: *
106: * Utility function: log an error.
107: */
1.54 pooka 108: void
1.1 ad 109: module_error(const char *fmt, ...)
110: {
111: va_list ap;
112:
113: va_start(ap, fmt);
114: printf("WARNING: module error: ");
115: vprintf(fmt, ap);
116: printf("\n");
117: va_end(ap);
118: }
119:
120: /*
1.34 ad 121: * module_print:
122: *
123: * Utility function: log verbose output.
124: */
1.54 pooka 125: void
1.34 ad 126: module_print(const char *fmt, ...)
127: {
128: va_list ap;
129:
130: if (module_verbose_on) {
131: va_start(ap, fmt);
132: printf("DEBUG: module: ");
133: vprintf(fmt, ap);
134: printf("\n");
135: va_end(ap);
136: }
137: }
138:
1.55 elad 139: static int
140: module_listener_cb(kauth_cred_t cred, kauth_action_t action, void *cookie,
141: void *arg0, void *arg1, void *arg2, void *arg3)
142: {
143: int result;
144:
145: result = KAUTH_RESULT_DEFER;
146:
147: if (action != KAUTH_SYSTEM_MODULE)
148: return result;
149:
150: if ((uintptr_t)arg2 != 0) /* autoload */
151: result = KAUTH_RESULT_ALLOW;
152:
153: return result;
154: }
155:
1.34 ad 156: /*
1.70 pgoyette 157: * Allocate a new module_t
158: */
159: static module_t *
160: module_newmodule(modsrc_t source)
161: {
162: module_t *mod;
163:
164: mod = kmem_zalloc(sizeof(*mod), KM_SLEEP);
165: if (mod != NULL) {
166: mod->mod_source = source;
167: mod->mod_info = NULL;
168: mod->mod_flags = 0;
169: }
170: return mod;
171: }
172:
173: /*
174: * Require the -f (force) flag to load a module
175: */
176: static void
177: module_require_force(struct module *mod)
178: {
179: mod->mod_flags |= MODFLG_MUST_FORCE;
180: }
181:
182: /*
1.59 pooka 183: * Add modules to the builtin list. This can done at boottime or
184: * at runtime if the module is linked into the kernel with an
185: * external linker. All or none of the input will be handled.
186: * Optionally, the modules can be initialized. If they are not
187: * initialized, module_init_class() or module_load() can be used
188: * later, but these are not guaranteed to give atomic results.
189: */
190: int
191: module_builtin_add(modinfo_t *const *mip, size_t nmodinfo, bool init)
192: {
193: struct module **modp = NULL, *mod_iter;
194: int rv = 0, i, mipskip;
195:
196: if (init) {
197: rv = kauth_authorize_system(kauth_cred_get(),
198: KAUTH_SYSTEM_MODULE, 0, (void *)(uintptr_t)MODCTL_LOAD,
199: (void *)(uintptr_t)1, NULL);
200: if (rv) {
201: return rv;
202: }
203: }
204:
205: for (i = 0, mipskip = 0; i < nmodinfo; i++) {
206: if (mip[i] == &module_dummy) {
207: KASSERT(nmodinfo > 0);
208: nmodinfo--;
209: }
210: }
211: if (nmodinfo == 0)
212: return 0;
213:
214: modp = kmem_zalloc(sizeof(*modp) * nmodinfo, KM_SLEEP);
215: for (i = 0, mipskip = 0; i < nmodinfo; i++) {
216: if (mip[i+mipskip] == &module_dummy) {
217: mipskip++;
218: continue;
219: }
1.70 pgoyette 220: modp[i] = module_newmodule(MODULE_SOURCE_KERNEL);
1.59 pooka 221: modp[i]->mod_info = mip[i+mipskip];
222: }
1.72 pgoyette 223: kernconfig_lock();
1.59 pooka 224:
225: /* do this in three stages for error recovery and atomicity */
226:
227: /* first check for presence */
228: for (i = 0; i < nmodinfo; i++) {
229: TAILQ_FOREACH(mod_iter, &module_builtins, mod_chain) {
230: if (strcmp(mod_iter->mod_info->mi_name,
231: modp[i]->mod_info->mi_name) == 0)
232: break;
233: }
234: if (mod_iter) {
235: rv = EEXIST;
236: goto out;
237: }
238:
239: if (module_lookup(modp[i]->mod_info->mi_name) != NULL) {
240: rv = EEXIST;
241: goto out;
242: }
243: }
244:
245: /* then add to list */
246: for (i = 0; i < nmodinfo; i++) {
247: TAILQ_INSERT_TAIL(&module_builtins, modp[i], mod_chain);
248: module_builtinlist++;
249: }
250:
251: /* finally, init (if required) */
252: if (init) {
253: for (i = 0; i < nmodinfo; i++) {
1.74 pooka 254: rv = module_do_builtin(modp[i]->mod_info->mi_name,
255: NULL, NULL);
1.59 pooka 256: /* throw in the towel, recovery hard & not worth it */
257: if (rv)
258: panic("builtin module \"%s\" init failed: %d",
259: modp[i]->mod_info->mi_name, rv);
260: }
261: }
262:
263: out:
1.72 pgoyette 264: kernconfig_unlock();
1.59 pooka 265: if (rv != 0) {
266: for (i = 0; i < nmodinfo; i++) {
267: if (modp[i])
268: kmem_free(modp[i], sizeof(*modp[i]));
269: }
270: }
271: kmem_free(modp, sizeof(*modp) * nmodinfo);
272: return rv;
273: }
274:
275: /*
276: * Optionally fini and remove builtin module from the kernel.
277: * Note: the module will now be unreachable except via mi && builtin_add.
278: */
279: int
280: module_builtin_remove(modinfo_t *mi, bool fini)
281: {
282: struct module *mod;
283: int rv = 0;
284:
285: if (fini) {
286: rv = kauth_authorize_system(kauth_cred_get(),
287: KAUTH_SYSTEM_MODULE, 0, (void *)(uintptr_t)MODCTL_UNLOAD,
288: NULL, NULL);
289: if (rv)
290: return rv;
291:
1.72 pgoyette 292: kernconfig_lock();
1.70 pgoyette 293: rv = module_do_unload(mi->mi_name, true);
1.59 pooka 294: if (rv) {
295: goto out;
296: }
297: } else {
1.72 pgoyette 298: kernconfig_lock();
1.59 pooka 299: }
300: TAILQ_FOREACH(mod, &module_builtins, mod_chain) {
301: if (strcmp(mod->mod_info->mi_name, mi->mi_name) == 0)
302: break;
303: }
304: if (mod) {
305: TAILQ_REMOVE(&module_builtins, mod, mod_chain);
306: module_builtinlist--;
307: } else {
308: KASSERT(fini == false);
309: rv = ENOENT;
310: }
311:
312: out:
1.72 pgoyette 313: kernconfig_unlock();
1.59 pooka 314: return rv;
315: }
316:
317: /*
1.1 ad 318: * module_init:
319: *
320: * Initialize the module subsystem.
321: */
322: void
323: module_init(void)
324: {
1.59 pooka 325: __link_set_decl(modules, modinfo_t);
1.25 ad 326: extern struct vm_map *module_map;
1.59 pooka 327: modinfo_t *const *mip;
328: int rv;
1.1 ad 329:
1.25 ad 330: if (module_map == NULL) {
331: module_map = kernel_map;
332: }
1.71 pgoyette 333: cv_init(&module_thread_cv, "mod_unld");
1.26 ad 334: mutex_init(&module_thread_lock, MUTEX_DEFAULT, IPL_NONE);
1.66 pgoyette 335:
1.13 ad 336: #ifdef MODULAR /* XXX */
1.11 ad 337: module_init_md();
1.12 ad 338: #endif
1.16 ad 339:
1.78 mrg 340: if (!module_machine)
341: module_machine = machine;
1.16 ad 342: #if __NetBSD_Version__ / 1000000 % 100 == 99 /* -current */
1.41 rmind 343: snprintf(module_base, sizeof(module_base), "/stand/%s/%s/modules",
1.78 mrg 344: module_machine, osrelease);
1.16 ad 345: #else /* release */
1.41 rmind 346: snprintf(module_base, sizeof(module_base), "/stand/%s/%d.%d/modules",
1.78 mrg 347: module_machine, __NetBSD_Version__ / 100000000,
1.16 ad 348: __NetBSD_Version__ / 1000000 % 100);
349: #endif
1.50 elad 350:
1.55 elad 351: module_listener = kauth_listen_scope(KAUTH_SCOPE_SYSTEM,
352: module_listener_cb, NULL);
1.59 pooka 353:
354: __link_set_foreach(mip, modules) {
1.77 mbalmer 355: if ((rv = module_builtin_add(mip, 1, false)) != 0)
1.59 pooka 356: module_error("builtin %s failed: %d\n",
357: (*mip)->mi_name, rv);
358: }
1.69 pooka 359:
360: sysctl_module_setup();
1.51 elad 361: }
362:
1.50 elad 363: /*
1.70 pgoyette 364: * module_start_unload_thread:
1.50 elad 365: *
366: * Start the auto unload kthread.
367: */
368: void
1.70 pgoyette 369: module_start_unload_thread(void)
1.50 elad 370: {
371: int error;
1.26 ad 372:
373: error = kthread_create(PRI_VM, KTHREAD_MPSAFE, NULL, module_thread,
374: NULL, NULL, "modunload");
375: if (error != 0)
376: panic("module_init: %d", error);
1.1 ad 377: }
378:
1.70 pgoyette 379: /*
380: * module_builtin_require_force
381: *
382: * Require MODCTL_MUST_FORCE to load any built-in modules that have
383: * not yet been initialized
384: */
385: void
386: module_builtin_require_force(void)
387: {
388: module_t *mod;
389:
1.72 pgoyette 390: kernconfig_lock();
1.70 pgoyette 391: TAILQ_FOREACH(mod, &module_builtins, mod_chain) {
392: module_require_force(mod);
393: }
1.72 pgoyette 394: kernconfig_unlock();
1.70 pgoyette 395: }
396:
1.69 pooka 397: static struct sysctllog *module_sysctllog;
398:
399: static void
400: sysctl_module_setup(void)
1.34 ad 401: {
402: const struct sysctlnode *node = NULL;
403:
1.69 pooka 404: sysctl_createv(&module_sysctllog, 0, NULL, NULL,
1.34 ad 405: CTLFLAG_PERMANENT,
406: CTLTYPE_NODE, "kern", NULL,
407: NULL, 0, NULL, 0,
408: CTL_KERN, CTL_EOL);
1.69 pooka 409: sysctl_createv(&module_sysctllog, 0, NULL, &node,
1.34 ad 410: CTLFLAG_PERMANENT,
411: CTLTYPE_NODE, "module",
412: SYSCTL_DESCR("Module options"),
413: NULL, 0, NULL, 0,
414: CTL_KERN, CTL_CREATE, CTL_EOL);
415:
416: if (node == NULL)
417: return;
418:
1.69 pooka 419: sysctl_createv(&module_sysctllog, 0, &node, NULL,
1.34 ad 420: CTLFLAG_PERMANENT | CTLFLAG_READWRITE,
1.64 jruoho 421: CTLTYPE_BOOL, "autoload",
1.34 ad 422: SYSCTL_DESCR("Enable automatic load of modules"),
423: NULL, 0, &module_autoload_on, 0,
424: CTL_CREATE, CTL_EOL);
1.69 pooka 425: sysctl_createv(&module_sysctllog, 0, &node, NULL,
1.34 ad 426: CTLFLAG_PERMANENT | CTLFLAG_READWRITE,
1.64 jruoho 427: CTLTYPE_BOOL, "verbose",
1.34 ad 428: SYSCTL_DESCR("Enable verbose output"),
429: NULL, 0, &module_verbose_on, 0,
430: CTL_CREATE, CTL_EOL);
431: }
432:
1.1 ad 433: /*
434: * module_init_class:
435: *
436: * Initialize all built-in and pre-loaded modules of the
437: * specified class.
438: */
439: void
440: module_init_class(modclass_t class)
441: {
1.63 pooka 442: TAILQ_HEAD(, module) bi_fail = TAILQ_HEAD_INITIALIZER(bi_fail);
1.59 pooka 443: module_t *mod;
444: modinfo_t *mi;
1.1 ad 445:
1.72 pgoyette 446: kernconfig_lock();
1.1 ad 447: /*
1.59 pooka 448: * Builtins first. These will not depend on pre-loaded modules
449: * (because the kernel would not link).
1.1 ad 450: */
1.59 pooka 451: do {
452: TAILQ_FOREACH(mod, &module_builtins, mod_chain) {
453: mi = mod->mod_info;
454: if (class != MODULE_CLASS_ANY && class != mi->mi_class)
455: continue;
1.63 pooka 456: /*
457: * If initializing a builtin module fails, don't try
458: * to load it again. But keep it around and queue it
1.70 pgoyette 459: * on the builtins list after we're done with module
460: * init. Don't set it to MODFLG_MUST_FORCE in case a
461: * future attempt to initialize can be successful.
462: * (If the module has previously been set to
463: * MODFLG_MUST_FORCE, don't try to override that!)
1.63 pooka 464: */
1.70 pgoyette 465: if (mod->mod_flags & MODFLG_MUST_FORCE ||
1.74 pooka 466: module_do_builtin(mi->mi_name, NULL, NULL) != 0) {
1.63 pooka 467: TAILQ_REMOVE(&module_builtins, mod, mod_chain);
468: TAILQ_INSERT_TAIL(&bi_fail, mod, mod_chain);
469: }
1.59 pooka 470: break;
1.1 ad 471: }
1.59 pooka 472: } while (mod != NULL);
473:
1.1 ad 474: /*
475: * Now preloaded modules. These will be pulled off the
476: * list as we call module_do_load();
477: */
1.11 ad 478: do {
1.59 pooka 479: TAILQ_FOREACH(mod, &module_bootlist, mod_chain) {
1.11 ad 480: mi = mod->mod_info;
1.59 pooka 481: if (class != MODULE_CLASS_ANY && class != mi->mi_class)
1.11 ad 482: continue;
1.18 ad 483: module_do_load(mi->mi_name, false, 0, NULL, NULL,
1.38 christos 484: class, false);
1.11 ad 485: break;
486: }
487: } while (mod != NULL);
1.63 pooka 488:
1.70 pgoyette 489: /* return failed builtin modules to builtin list */
1.63 pooka 490: while ((mod = TAILQ_FIRST(&bi_fail)) != NULL) {
491: TAILQ_REMOVE(&bi_fail, mod, mod_chain);
492: TAILQ_INSERT_TAIL(&module_builtins, mod, mod_chain);
493: }
494:
1.72 pgoyette 495: kernconfig_unlock();
1.1 ad 496: }
497:
498: /*
1.21 ad 499: * module_compatible:
1.1 ad 500: *
1.21 ad 501: * Return true if the two supplied kernel versions are said to
502: * have the same binary interface for kernel code. The entire
503: * version is signficant for the development tree (-current),
504: * major and minor versions are significant for official
505: * releases of the system.
1.1 ad 506: */
1.22 pooka 507: bool
1.21 ad 508: module_compatible(int v1, int v2)
1.1 ad 509: {
510:
1.21 ad 511: #if __NetBSD_Version__ / 1000000 % 100 == 99 /* -current */
512: return v1 == v2;
513: #else /* release */
514: return abs(v1 - v2) < 10000;
515: #endif
1.1 ad 516: }
517:
518: /*
519: * module_load:
520: *
1.9 jmmv 521: * Load a single module from the file system.
1.1 ad 522: */
523: int
1.18 ad 524: module_load(const char *filename, int flags, prop_dictionary_t props,
1.23 ad 525: modclass_t class)
1.1 ad 526: {
527: int error;
528:
1.18 ad 529: /* Authorize. */
530: error = kauth_authorize_system(kauth_cred_get(), KAUTH_SYSTEM_MODULE,
531: 0, (void *)(uintptr_t)MODCTL_LOAD, NULL, NULL);
532: if (error != 0) {
533: return error;
534: }
535:
1.72 pgoyette 536: kernconfig_lock();
1.20 ad 537: error = module_do_load(filename, false, flags, props, NULL, class,
1.23 ad 538: false);
1.72 pgoyette 539: kernconfig_unlock();
1.1 ad 540:
541: return error;
542: }
543:
544: /*
1.23 ad 545: * module_autoload:
546: *
547: * Load a single module from the file system, system initiated.
548: */
549: int
550: module_autoload(const char *filename, modclass_t class)
551: {
552: int error;
553:
1.72 pgoyette 554: kernconfig_lock();
1.23 ad 555:
1.34 ad 556: /* Nothing if the user has disabled it. */
557: if (!module_autoload_on) {
1.72 pgoyette 558: kernconfig_unlock();
1.34 ad 559: return EPERM;
560: }
561:
1.56 dholland 562: /* Disallow path separators and magic symlinks. */
1.29 ad 563: if (strchr(filename, '/') != NULL || strchr(filename, '@') != NULL ||
564: strchr(filename, '.') != NULL) {
1.72 pgoyette 565: kernconfig_unlock();
1.29 ad 566: return EPERM;
567: }
568:
1.23 ad 569: /* Authorize. */
570: error = kauth_authorize_system(kauth_cred_get(), KAUTH_SYSTEM_MODULE,
571: 0, (void *)(uintptr_t)MODCTL_LOAD, (void *)(uintptr_t)1, NULL);
572:
1.72 pgoyette 573: if (error == 0)
574: error = module_do_load(filename, false, 0, NULL, NULL, class,
575: true);
576:
577: kernconfig_unlock();
578: return error;
1.23 ad 579: }
580:
581: /*
1.1 ad 582: * module_unload:
583: *
584: * Find and unload a module by name.
585: */
586: int
587: module_unload(const char *name)
588: {
589: int error;
590:
1.18 ad 591: /* Authorize. */
592: error = kauth_authorize_system(kauth_cred_get(), KAUTH_SYSTEM_MODULE,
593: 0, (void *)(uintptr_t)MODCTL_UNLOAD, NULL, NULL);
594: if (error != 0) {
595: return error;
596: }
597:
1.72 pgoyette 598: kernconfig_lock();
1.70 pgoyette 599: error = module_do_unload(name, true);
1.72 pgoyette 600: kernconfig_unlock();
1.1 ad 601:
602: return error;
603: }
604:
605: /*
606: * module_lookup:
607: *
608: * Look up a module by name.
609: */
610: module_t *
611: module_lookup(const char *name)
612: {
613: module_t *mod;
614:
1.72 pgoyette 615: KASSERT(kernconfig_is_held());
1.1 ad 616:
617: TAILQ_FOREACH(mod, &module_list, mod_chain) {
618: if (strcmp(mod->mod_info->mi_name, name) == 0) {
619: break;
620: }
621: }
622:
623: return mod;
624: }
625:
626: /*
627: * module_hold:
628: *
629: * Add a single reference to a module. It's the caller's
630: * responsibility to ensure that the reference is dropped
631: * later.
632: */
633: int
634: module_hold(const char *name)
635: {
636: module_t *mod;
637:
1.72 pgoyette 638: kernconfig_lock();
1.1 ad 639: mod = module_lookup(name);
640: if (mod == NULL) {
1.72 pgoyette 641: kernconfig_unlock();
1.1 ad 642: return ENOENT;
643: }
644: mod->mod_refcnt++;
1.72 pgoyette 645: kernconfig_unlock();
1.1 ad 646:
647: return 0;
648: }
649:
650: /*
651: * module_rele:
652: *
653: * Release a reference acquired with module_hold().
654: */
655: void
656: module_rele(const char *name)
657: {
658: module_t *mod;
659:
1.72 pgoyette 660: kernconfig_lock();
1.1 ad 661: mod = module_lookup(name);
662: if (mod == NULL) {
1.72 pgoyette 663: kernconfig_unlock();
1.1 ad 664: panic("module_rele: gone");
665: }
666: mod->mod_refcnt--;
1.72 pgoyette 667: kernconfig_unlock();
1.1 ad 668: }
669:
670: /*
1.27 ad 671: * module_enqueue:
672: *
673: * Put a module onto the global list and update counters.
674: */
1.53 pooka 675: void
1.27 ad 676: module_enqueue(module_t *mod)
677: {
678: int i;
679:
1.72 pgoyette 680: KASSERT(kernconfig_is_held());
1.53 pooka 681:
1.27 ad 682: /*
683: * If there are requisite modules, put at the head of the queue.
684: * This is so that autounload can unload requisite modules with
685: * only one pass through the queue.
686: */
687: if (mod->mod_nrequired) {
688: TAILQ_INSERT_HEAD(&module_list, mod, mod_chain);
689:
690: /* Add references to the requisite modules. */
691: for (i = 0; i < mod->mod_nrequired; i++) {
692: KASSERT(mod->mod_required[i] != NULL);
693: mod->mod_required[i]->mod_refcnt++;
694: }
695: } else {
696: TAILQ_INSERT_TAIL(&module_list, mod, mod_chain);
697: }
698: module_count++;
699: module_gen++;
700: }
701:
702: /*
1.1 ad 703: * module_do_builtin:
704: *
1.59 pooka 705: * Initialize a module from the list of modules that are
706: * already linked into the kernel.
1.1 ad 707: */
708: static int
1.74 pooka 709: module_do_builtin(const char *name, module_t **modp, prop_dictionary_t props)
1.1 ad 710: {
711: const char *p, *s;
712: char buf[MAXMODNAME];
1.59 pooka 713: modinfo_t *mi = NULL;
1.72 pgoyette 714: module_t *mod, *mod2, *mod_loaded, *prev_active;
1.1 ad 715: size_t len;
1.27 ad 716: int error;
1.1 ad 717:
1.72 pgoyette 718: KASSERT(kernconfig_is_held());
1.1 ad 719:
720: /*
1.59 pooka 721: * Search the list to see if we have a module by this name.
1.1 ad 722: */
1.59 pooka 723: TAILQ_FOREACH(mod, &module_builtins, mod_chain) {
724: if (strcmp(mod->mod_info->mi_name, name) == 0) {
725: mi = mod->mod_info;
726: break;
1.1 ad 727: }
728: }
729:
730: /*
1.59 pooka 731: * Check to see if already loaded. This might happen if we
732: * were already loaded as a dependency.
1.1 ad 733: */
1.59 pooka 734: if ((mod_loaded = module_lookup(name)) != NULL) {
735: KASSERT(mod == NULL);
736: if (modp)
737: *modp = mod_loaded;
738: return 0;
1.1 ad 739: }
1.59 pooka 740:
741: /* Note! This is from TAILQ, not immediate above */
1.65 pooka 742: if (mi == NULL) {
743: /*
744: * XXX: We'd like to panic here, but currently in some
745: * cases (such as nfsserver + nfs), the dependee can be
746: * succesfully linked without the dependencies.
747: */
748: module_error("can't find builtin dependency `%s'", name);
749: return ENOENT;
750: }
1.1 ad 751:
752: /*
753: * Initialize pre-requisites.
754: */
755: if (mi->mi_required != NULL) {
756: for (s = mi->mi_required; *s != '\0'; s = p) {
757: if (*s == ',')
758: s++;
759: p = s;
760: while (*p != '\0' && *p != ',')
761: p++;
762: len = min(p - s + 1, sizeof(buf));
763: strlcpy(buf, s, len);
764: if (buf[0] == '\0')
765: break;
766: if (mod->mod_nrequired == MAXMODDEPS - 1) {
767: module_error("too many required modules");
768: return EINVAL;
769: }
1.74 pooka 770: error = module_do_builtin(buf, &mod2, NULL);
1.1 ad 771: if (error != 0) {
772: return error;
773: }
774: mod->mod_required[mod->mod_nrequired++] = mod2;
775: }
776: }
777:
778: /*
779: * Try to initialize the module.
780: */
1.72 pgoyette 781: prev_active = module_active;
1.12 ad 782: module_active = mod;
1.74 pooka 783: error = (*mi->mi_modcmd)(MODULE_CMD_INIT, props);
1.72 pgoyette 784: module_active = prev_active;
1.1 ad 785: if (error != 0) {
786: module_error("builtin module `%s' "
787: "failed to init", mi->mi_name);
788: return error;
789: }
1.59 pooka 790:
791: /* load always succeeds after this point */
792:
793: TAILQ_REMOVE(&module_builtins, mod, mod_chain);
794: module_builtinlist--;
795: if (modp != NULL) {
796: *modp = mod;
797: }
1.50 elad 798: if (mi->mi_class == MODULE_CLASS_SECMODEL)
799: secmodel_register();
1.27 ad 800: module_enqueue(mod);
1.1 ad 801: return 0;
802: }
803:
804: /*
805: * module_do_load:
806: *
807: * Helper routine: load a module from the file system, or one
808: * pushed by the boot loader.
809: */
810: static int
1.27 ad 811: module_do_load(const char *name, bool isdep, int flags,
1.20 ad 812: prop_dictionary_t props, module_t **modp, modclass_t class,
813: bool autoload)
1.1 ad 814: {
1.72 pgoyette 815: #define MODULE_MAX_DEPTH 6
816:
817: TAILQ_HEAD(pending_t, module);
818: static int depth = 0;
819: static struct pending_t *pending_lists[MODULE_MAX_DEPTH];
820: struct pending_t *pending;
821: struct pending_t new_pending = TAILQ_HEAD_INITIALIZER(new_pending);
1.1 ad 822: modinfo_t *mi;
1.72 pgoyette 823: module_t *mod, *mod2, *prev_active;
1.46 jnemeth 824: prop_dictionary_t filedict;
1.54 pooka 825: char buf[MAXMODNAME];
1.1 ad 826: const char *s, *p;
827: int error;
1.54 pooka 828: size_t len;
1.1 ad 829:
1.72 pgoyette 830: KASSERT(kernconfig_is_held());
1.1 ad 831:
1.46 jnemeth 832: filedict = NULL;
1.1 ad 833: error = 0;
834:
835: /*
836: * Avoid recursing too far.
837: */
1.72 pgoyette 838: if (++depth > MODULE_MAX_DEPTH) {
839: module_error("recursion too deep");
1.1 ad 840: depth--;
841: return EMLINK;
842: }
843:
844: /*
1.72 pgoyette 845: * Set up the pending list for this depth. If this is a
846: * recursive entry, then use same list as for outer call,
847: * else use the locally allocated list. In either case,
848: * remember which one we're using.
849: */
850: if (isdep) {
851: KASSERT(depth > 1);
852: pending = pending_lists[depth - 2];
853: } else
854: pending = &new_pending;
855: pending_lists[depth - 1] = pending;
856:
857: /*
1.59 pooka 858: * Search the list of disabled builtins first.
859: */
860: TAILQ_FOREACH(mod, &module_builtins, mod_chain) {
861: if (strcmp(mod->mod_info->mi_name, name) == 0) {
862: break;
863: }
864: }
865: if (mod) {
1.70 pgoyette 866: if ((mod->mod_flags & MODFLG_MUST_FORCE) &&
867: (flags & MODCTL_LOAD_FORCE) == 0) {
1.62 pooka 868: if (!autoload) {
869: module_error("use -f to reinstate "
870: "builtin module \"%s\"", name);
871: }
1.59 pooka 872: depth--;
873: return EPERM;
874: } else {
1.82 ! pgoyette 875: error = module_do_builtin(name, modp, props);
1.59 pooka 876: depth--;
877: return error;
878: }
879: }
880:
881: /*
1.1 ad 882: * Load the module and link. Before going to the file system,
1.57 pooka 883: * scan the list of modules loaded by the boot loader.
1.1 ad 884: */
885: TAILQ_FOREACH(mod, &module_bootlist, mod_chain) {
1.27 ad 886: if (strcmp(mod->mod_info->mi_name, name) == 0) {
1.1 ad 887: TAILQ_REMOVE(&module_bootlist, mod, mod_chain);
888: break;
889: }
890: }
1.14 rumble 891: if (mod != NULL) {
1.72 pgoyette 892: TAILQ_INSERT_TAIL(pending, mod, mod_chain);
1.14 rumble 893: } else {
1.27 ad 894: /*
895: * If a requisite module, check to see if it is
896: * already present.
897: */
898: if (isdep) {
1.72 pgoyette 899: mod = module_lookup(name);
1.27 ad 900: if (mod != NULL) {
901: if (modp != NULL) {
902: *modp = mod;
903: }
904: depth--;
905: return 0;
906: }
907: }
1.70 pgoyette 908: mod = module_newmodule(MODULE_SOURCE_FILESYS);
1.1 ad 909: if (mod == NULL) {
1.38 christos 910: module_error("out of memory for `%s'", name);
1.1 ad 911: depth--;
912: return ENOMEM;
913: }
1.54 pooka 914:
1.67 pgoyette 915: error = module_load_vfs_vec(name, flags, autoload, mod,
916: &filedict);
1.1 ad 917: if (error != 0) {
918: kmem_free(mod, sizeof(*mod));
919: depth--;
1.8 rumble 920: return error;
1.7 rumble 921: }
1.72 pgoyette 922: TAILQ_INSERT_TAIL(pending, mod, mod_chain);
1.54 pooka 923:
1.11 ad 924: error = module_fetch_info(mod);
925: if (error != 0) {
1.33 ad 926: module_error("cannot fetch module info for `%s'",
927: name);
1.11 ad 928: goto fail;
929: }
1.1 ad 930: }
931:
932: /*
1.11 ad 933: * Check compatibility.
1.1 ad 934: */
935: mi = mod->mod_info;
1.3 rumble 936: if (strlen(mi->mi_name) >= MAXMODNAME) {
937: error = EINVAL;
1.32 christos 938: module_error("module name `%s' too long", mi->mi_name);
1.3 rumble 939: goto fail;
940: }
1.21 ad 941: if (!module_compatible(mi->mi_version, __NetBSD_Version__)) {
1.33 ad 942: module_error("module built for `%d', system `%d'",
1.32 christos 943: mi->mi_version, __NetBSD_Version__);
1.24 ad 944: if ((flags & MODCTL_LOAD_FORCE) != 0) {
945: module_error("forced load, system may be unstable");
946: } else {
947: error = EPROGMISMATCH;
948: goto fail;
949: }
1.21 ad 950: }
1.3 rumble 951:
1.1 ad 952: /*
1.18 ad 953: * If a specific kind of module was requested, ensure that we have
954: * a match.
955: */
956: if (class != MODULE_CLASS_ANY && class != mi->mi_class) {
1.34 ad 957: module_print("incompatible module class for `%s' (%d != %d)",
1.32 christos 958: name, class, mi->mi_class);
1.18 ad 959: error = ENOENT;
960: goto fail;
961: }
962:
963: /*
1.27 ad 964: * If loading a dependency, `name' is a plain module name.
1.1 ad 965: * The name must match.
966: */
1.27 ad 967: if (isdep && strcmp(mi->mi_name, name) != 0) {
1.32 christos 968: module_error("dependency name mismatch (`%s' != `%s')",
969: name, mi->mi_name);
1.1 ad 970: error = ENOENT;
971: goto fail;
972: }
973:
974: /*
1.3 rumble 975: * Check to see if the module is already loaded. If so, we may
976: * have been recursively called to handle a dependency, so be sure
977: * to set modp.
1.1 ad 978: */
1.3 rumble 979: if ((mod2 = module_lookup(mi->mi_name)) != NULL) {
1.5 rumble 980: if (modp != NULL)
981: *modp = mod2;
1.34 ad 982: module_print("module `%s' already loaded", mi->mi_name);
1.1 ad 983: error = EEXIST;
984: goto fail;
985: }
1.3 rumble 986:
987: /*
988: * Block circular dependencies.
989: */
1.72 pgoyette 990: TAILQ_FOREACH(mod2, pending, mod_chain) {
1.1 ad 991: if (mod == mod2) {
992: continue;
993: }
994: if (strcmp(mod2->mod_info->mi_name, mi->mi_name) == 0) {
995: error = EDEADLK;
1.32 christos 996: module_error("circular dependency detected for `%s'",
997: mi->mi_name);
1.1 ad 998: goto fail;
999: }
1000: }
1001:
1002: /*
1003: * Now try to load any requisite modules.
1004: */
1005: if (mi->mi_required != NULL) {
1006: for (s = mi->mi_required; *s != '\0'; s = p) {
1007: if (*s == ',')
1008: s++;
1009: p = s;
1010: while (*p != '\0' && *p != ',')
1011: p++;
1.3 rumble 1012: len = p - s + 1;
1013: if (len >= MAXMODNAME) {
1014: error = EINVAL;
1.32 christos 1015: module_error("required module name `%s'"
1016: " too long", mi->mi_required);
1.3 rumble 1017: goto fail;
1018: }
1.1 ad 1019: strlcpy(buf, s, len);
1020: if (buf[0] == '\0')
1021: break;
1022: if (mod->mod_nrequired == MAXMODDEPS - 1) {
1023: error = EINVAL;
1.32 christos 1024: module_error("too many required modules (%d)",
1025: mod->mod_nrequired);
1.1 ad 1026: goto fail;
1027: }
1.6 rumble 1028: if (strcmp(buf, mi->mi_name) == 0) {
1029: error = EDEADLK;
1.32 christos 1030: module_error("self-dependency detected for "
1031: "`%s'", mi->mi_name);
1.6 rumble 1032: goto fail;
1033: }
1.9 jmmv 1034: error = module_do_load(buf, true, flags, NULL,
1.81 christos 1035: &mod2, MODULE_CLASS_ANY, true);
1.27 ad 1036: if (error != 0)
1.1 ad 1037: goto fail;
1.81 christos 1038: mod->mod_required[mod->mod_nrequired++] = mod2;
1.1 ad 1039: }
1040: }
1041:
1042: /*
1.15 ad 1043: * We loaded all needed modules successfully: perform global
1044: * relocations and initialize.
1.1 ad 1045: */
1.15 ad 1046: error = kobj_affix(mod->mod_kobj, mi->mi_name);
1047: if (error != 0) {
1.36 ad 1048: /* Cannot touch 'mi' as the module is now gone. */
1049: module_error("unable to affix module `%s'", name);
1.15 ad 1050: goto fail2;
1051: }
1052:
1.54 pooka 1053: if (filedict) {
1054: if (!module_merge_dicts(filedict, props)) {
1055: module_error("module properties failed");
1056: error = EINVAL;
1.46 jnemeth 1057: goto fail;
1058: }
1059: }
1.72 pgoyette 1060: prev_active = module_active;
1.12 ad 1061: module_active = mod;
1.54 pooka 1062: error = (*mi->mi_modcmd)(MODULE_CMD_INIT, filedict ? filedict : props);
1.72 pgoyette 1063: module_active = prev_active;
1.54 pooka 1064: if (filedict) {
1.46 jnemeth 1065: prop_object_release(filedict);
1.54 pooka 1066: filedict = NULL;
1.46 jnemeth 1067: }
1.1 ad 1068: if (error != 0) {
1.32 christos 1069: module_error("modcmd function returned error %d for `%s'",
1070: error, mi->mi_name);
1.1 ad 1071: goto fail;
1072: }
1.54 pooka 1073:
1.50 elad 1074: if (mi->mi_class == MODULE_CLASS_SECMODEL)
1075: secmodel_register();
1.1 ad 1076:
1077: /*
1078: * Good, the module loaded successfully. Put it onto the
1079: * list and add references to its requisite modules.
1080: */
1.72 pgoyette 1081: TAILQ_REMOVE(pending, mod, mod_chain);
1.27 ad 1082: module_enqueue(mod);
1.1 ad 1083: if (modp != NULL) {
1084: *modp = mod;
1085: }
1.26 ad 1086: if (autoload) {
1087: /*
1088: * Arrange to try unloading the module after
1089: * a short delay.
1090: */
1091: mod->mod_autotime = time_second + module_autotime;
1092: module_thread_kick();
1093: }
1.1 ad 1094: depth--;
1095: return 0;
1.7 rumble 1096:
1.1 ad 1097: fail:
1.15 ad 1098: kobj_unload(mod->mod_kobj);
1099: fail2:
1.54 pooka 1100: if (filedict != NULL) {
1101: prop_object_release(filedict);
1102: filedict = NULL;
1103: }
1.72 pgoyette 1104: TAILQ_REMOVE(pending, mod, mod_chain);
1.1 ad 1105: kmem_free(mod, sizeof(*mod));
1106: depth--;
1107: return error;
1108: }
1109:
1110: /*
1111: * module_do_unload:
1112: *
1113: * Helper routine: do the dirty work of unloading a module.
1114: */
1115: static int
1.70 pgoyette 1116: module_do_unload(const char *name, bool load_requires_force)
1.1 ad 1117: {
1.72 pgoyette 1118: module_t *mod, *prev_active;
1.1 ad 1119: int error;
1120: u_int i;
1121:
1.72 pgoyette 1122: KASSERT(kernconfig_is_held());
1.1 ad 1123:
1124: mod = module_lookup(name);
1125: if (mod == NULL) {
1.32 christos 1126: module_error("module `%s' not found", name);
1.1 ad 1127: return ENOENT;
1128: }
1.59 pooka 1129: if (mod->mod_refcnt != 0) {
1.34 ad 1130: module_print("module `%s' busy", name);
1.1 ad 1131: return EBUSY;
1132: }
1.76 pooka 1133:
1134: /*
1135: * Builtin secmodels are there to stay.
1136: */
1137: if (mod->mod_source == MODULE_SOURCE_KERNEL &&
1138: mod->mod_info->mi_class == MODULE_CLASS_SECMODEL) {
1139: return EPERM;
1140: }
1141:
1.72 pgoyette 1142: prev_active = module_active;
1.12 ad 1143: module_active = mod;
1.1 ad 1144: error = (*mod->mod_info->mi_modcmd)(MODULE_CMD_FINI, NULL);
1.72 pgoyette 1145: module_active = prev_active;
1.1 ad 1146: if (error != 0) {
1.34 ad 1147: module_print("cannot unload module `%s' error=%d", name,
1.33 ad 1148: error);
1.1 ad 1149: return error;
1150: }
1.50 elad 1151: if (mod->mod_info->mi_class == MODULE_CLASS_SECMODEL)
1152: secmodel_deregister();
1.1 ad 1153: module_count--;
1154: TAILQ_REMOVE(&module_list, mod, mod_chain);
1155: for (i = 0; i < mod->mod_nrequired; i++) {
1156: mod->mod_required[i]->mod_refcnt--;
1157: }
1158: if (mod->mod_kobj != NULL) {
1159: kobj_unload(mod->mod_kobj);
1160: }
1.59 pooka 1161: if (mod->mod_source == MODULE_SOURCE_KERNEL) {
1162: mod->mod_nrequired = 0; /* will be re-parsed */
1.70 pgoyette 1163: if (load_requires_force)
1164: module_require_force(mod);
1.59 pooka 1165: TAILQ_INSERT_TAIL(&module_builtins, mod, mod_chain);
1166: module_builtinlist++;
1167: } else {
1168: kmem_free(mod, sizeof(*mod));
1169: }
1.26 ad 1170: module_gen++;
1.1 ad 1171:
1.82 ! pgoyette 1172: module_print("unloaded module `%s'", name);
1.1 ad 1173: return 0;
1174: }
1175:
1176: /*
1177: * module_prime:
1178: *
1179: * Push a module loaded by the bootloader onto our internal
1180: * list.
1181: */
1182: int
1.80 christos 1183: module_prime(const char *name, void *base, size_t size)
1.1 ad 1184: {
1185: module_t *mod;
1186: int error;
1187:
1.70 pgoyette 1188: mod = module_newmodule(MODULE_SOURCE_BOOT);
1.1 ad 1189: if (mod == NULL) {
1190: return ENOMEM;
1191: }
1192:
1.80 christos 1193: error = kobj_load_mem(&mod->mod_kobj, name, base, size);
1.1 ad 1194: if (error != 0) {
1.11 ad 1195: kmem_free(mod, sizeof(*mod));
1196: module_error("unable to load object pushed by boot loader");
1197: return error;
1198: }
1199: error = module_fetch_info(mod);
1200: if (error != 0) {
1201: kobj_unload(mod->mod_kobj);
1.1 ad 1202: kmem_free(mod, sizeof(*mod));
1.11 ad 1203: module_error("unable to load object pushed by boot loader");
1.1 ad 1204: return error;
1205: }
1.11 ad 1206:
1.1 ad 1207: TAILQ_INSERT_TAIL(&module_bootlist, mod, mod_chain);
1208:
1209: return 0;
1210: }
1.11 ad 1211:
1212: /*
1213: * module_fetch_into:
1214: *
1215: * Fetch modinfo record from a loaded module.
1216: */
1217: static int
1218: module_fetch_info(module_t *mod)
1219: {
1220: int error;
1221: void *addr;
1222: size_t size;
1223:
1224: /*
1225: * Find module info record and check compatibility.
1226: */
1227: error = kobj_find_section(mod->mod_kobj, "link_set_modules",
1228: &addr, &size);
1229: if (error != 0) {
1230: module_error("`link_set_modules' section not present");
1231: return error;
1232: }
1233: if (size != sizeof(modinfo_t **)) {
1234: module_error("`link_set_modules' section wrong size");
1235: return error;
1236: }
1237: mod->mod_info = *(modinfo_t **)addr;
1238:
1239: return 0;
1240: }
1.12 ad 1241:
1242: /*
1243: * module_find_section:
1244: *
1245: * Allows a module that is being initialized to look up a section
1246: * within its ELF object.
1247: */
1248: int
1249: module_find_section(const char *name, void **addr, size_t *size)
1250: {
1251:
1.72 pgoyette 1252: KASSERT(kernconfig_is_held());
1.12 ad 1253: KASSERT(module_active != NULL);
1254:
1255: return kobj_find_section(module_active->mod_kobj, name, addr, size);
1256: }
1.26 ad 1257:
1258: /*
1259: * module_thread:
1260: *
1261: * Automatically unload modules. We try once to unload autoloaded
1262: * modules after module_autotime seconds. If the system is under
1263: * severe memory pressure, we'll try unloading all modules.
1264: */
1265: static void
1266: module_thread(void *cookie)
1267: {
1268: module_t *mod, *next;
1.28 ad 1269: modinfo_t *mi;
1270: int error;
1.26 ad 1271:
1272: for (;;) {
1.72 pgoyette 1273: kernconfig_lock();
1.26 ad 1274: for (mod = TAILQ_FIRST(&module_list); mod != NULL; mod = next) {
1275: next = TAILQ_NEXT(mod, mod_chain);
1.61 pooka 1276: if (mod->mod_source == MODULE_SOURCE_KERNEL)
1277: continue;
1.37 ad 1278: if (uvmexp.free < uvmexp.freemin) {
1.26 ad 1279: module_thread_ticks = hz;
1280: } else if (mod->mod_autotime == 0) {
1281: continue;
1282: } else if (time_second < mod->mod_autotime) {
1283: module_thread_ticks = hz;
1284: continue;
1.37 ad 1285: } else {
1.26 ad 1286: mod->mod_autotime = 0;
1.37 ad 1287: }
1.28 ad 1288: /*
1289: * If this module wants to avoid autounload then
1290: * skip it. Some modules can ping-pong in and out
1291: * because their use is transient but often.
1292: * Example: exec_script.
1293: */
1294: mi = mod->mod_info;
1295: error = (*mi->mi_modcmd)(MODULE_CMD_AUTOUNLOAD, NULL);
1296: if (error == 0 || error == ENOTTY) {
1.70 pgoyette 1297: (void)module_do_unload(mi->mi_name, false);
1.28 ad 1298: }
1.26 ad 1299: }
1.72 pgoyette 1300: kernconfig_unlock();
1.26 ad 1301:
1302: mutex_enter(&module_thread_lock);
1303: (void)cv_timedwait(&module_thread_cv, &module_thread_lock,
1304: module_thread_ticks);
1305: module_thread_ticks = 0;
1306: mutex_exit(&module_thread_lock);
1307: }
1308: }
1309:
1310: /*
1311: * module_thread:
1312: *
1313: * Kick the module thread into action, perhaps because the
1314: * system is low on memory.
1315: */
1316: void
1317: module_thread_kick(void)
1318: {
1319:
1320: mutex_enter(&module_thread_lock);
1321: module_thread_ticks = hz;
1322: cv_broadcast(&module_thread_cv);
1323: mutex_exit(&module_thread_lock);
1324: }
1.30 ad 1325:
1326: #ifdef DDB
1327: /*
1328: * module_whatis:
1329: *
1330: * Helper routine for DDB.
1331: */
1332: void
1333: module_whatis(uintptr_t addr, void (*pr)(const char *, ...))
1334: {
1335: module_t *mod;
1336: size_t msize;
1337: vaddr_t maddr;
1338:
1339: TAILQ_FOREACH(mod, &module_list, mod_chain) {
1.43 ad 1340: if (mod->mod_kobj == NULL) {
1341: continue;
1342: }
1.49 dyoung 1343: if (kobj_stat(mod->mod_kobj, &maddr, &msize) != 0)
1344: continue;
1.30 ad 1345: if (addr < maddr || addr >= maddr + msize) {
1346: continue;
1347: }
1348: (*pr)("%p is %p+%zu, in kernel module `%s'\n",
1349: (void *)addr, (void *)maddr,
1350: (size_t)(addr - maddr), mod->mod_info->mi_name);
1351: }
1352: }
1353:
1354: /*
1355: * module_print_list:
1356: *
1357: * Helper routine for DDB.
1358: */
1359: void
1360: module_print_list(void (*pr)(const char *, ...))
1361: {
1362: const char *src;
1363: module_t *mod;
1364: size_t msize;
1365: vaddr_t maddr;
1366:
1367: (*pr)("%16s %16s %8s %8s\n", "NAME", "TEXT/DATA", "SIZE", "SOURCE");
1368:
1369: TAILQ_FOREACH(mod, &module_list, mod_chain) {
1370: switch (mod->mod_source) {
1371: case MODULE_SOURCE_KERNEL:
1372: src = "builtin";
1373: break;
1374: case MODULE_SOURCE_FILESYS:
1375: src = "filesys";
1376: break;
1377: case MODULE_SOURCE_BOOT:
1378: src = "boot";
1379: break;
1380: default:
1381: src = "unknown";
1382: break;
1383: }
1.49 dyoung 1384: if (mod->mod_kobj == NULL) {
1.43 ad 1385: maddr = 0;
1386: msize = 0;
1.49 dyoung 1387: } else if (kobj_stat(mod->mod_kobj, &maddr, &msize) != 0)
1388: continue;
1.31 ad 1389: (*pr)("%16s %16lx %8ld %8s\n", mod->mod_info->mi_name,
1.30 ad 1390: (long)maddr, (long)msize, src);
1391: }
1392: }
1393: #endif /* DDB */
1.46 jnemeth 1394:
1.47 jnemeth 1395: static bool
1396: module_merge_dicts(prop_dictionary_t existing_dict,
1397: const prop_dictionary_t new_dict)
1398: {
1399: prop_dictionary_keysym_t props_keysym;
1400: prop_object_iterator_t props_iter;
1401: prop_object_t props_obj;
1402: const char *props_key;
1403: bool error;
1404:
1.52 jnemeth 1405: if (new_dict == NULL) { /* nothing to merge */
1406: return true;
1407: }
1408:
1.47 jnemeth 1409: error = false;
1410: props_iter = prop_dictionary_iterator(new_dict);
1411: if (props_iter == NULL) {
1412: return false;
1413: }
1414:
1415: while ((props_obj = prop_object_iterator_next(props_iter)) != NULL) {
1416: props_keysym = (prop_dictionary_keysym_t)props_obj;
1417: props_key = prop_dictionary_keysym_cstring_nocopy(props_keysym);
1418: props_obj = prop_dictionary_get_keysym(new_dict, props_keysym);
1419: if ((props_obj == NULL) || !prop_dictionary_set(existing_dict,
1420: props_key, props_obj)) {
1421: error = true;
1422: goto out;
1423: }
1424: }
1425: error = false;
1426:
1427: out:
1428: prop_object_iterator_release(props_iter);
1429:
1430: return !error;
1431: }
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