1/*-
2 * Copyright (c) 1997 Doug Rabson
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 *
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24 * SUCH DAMAGE.
25 */
26
27#include "opt_compat.h"
28
29#include <sys/cdefs.h>
| 1/*-
2 * Copyright (c) 1997 Doug Rabson
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 *
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24 * SUCH DAMAGE.
25 */
26
27#include "opt_compat.h"
28
29#include <sys/cdefs.h>
|
31
32#include <sys/param.h>
33#include <sys/kernel.h>
34#include <sys/systm.h>
35#include <sys/eventhandler.h>
36#include <sys/malloc.h>
37#include <sys/sysproto.h>
38#include <sys/sysent.h>
39#include <sys/proc.h>
40#include <sys/lock.h>
41#include <sys/mutex.h>
42#include <sys/reboot.h>
43#include <sys/sx.h>
44#include <sys/module.h>
45#include <sys/linker.h>
46
47static MALLOC_DEFINE(M_MODULE, "module", "module data structures");
48
49typedef TAILQ_HEAD(, module) modulelist_t;
50struct module {
51 TAILQ_ENTRY(module) link; /* chain together all modules */
52 TAILQ_ENTRY(module) flink; /* all modules in a file */
53 struct linker_file *file; /* file which contains this module */
54 int refs; /* reference count */
55 int id; /* unique id number */
56 char *name; /* module name */
57 modeventhand_t handler; /* event handler */
58 void *arg; /* argument for handler */
59 modspecific_t data; /* module specific data */
60};
61
62#define MOD_EVENT(mod, type) (mod)->handler((mod), (type), (mod)->arg)
63
64static modulelist_t modules;
65struct sx modules_sx;
66static int nextid = 1;
67static void module_shutdown(void *, int);
68
69static int
70modevent_nop(module_t mod, int what, void *arg)
71{
72
73 switch(what) {
74 case MOD_LOAD:
75 return (0);
76 case MOD_UNLOAD:
77 return (EBUSY);
78 default:
79 return (EOPNOTSUPP);
80 }
81}
82
83static void
84module_init(void *arg)
85{
86
87 sx_init(&modules_sx, "module subsystem sx lock");
88 TAILQ_INIT(&modules);
89 EVENTHANDLER_REGISTER(shutdown_final, module_shutdown, NULL,
90 SHUTDOWN_PRI_DEFAULT);
91}
92
93SYSINIT(module, SI_SUB_KLD, SI_ORDER_FIRST, module_init, 0);
94
95static void
96module_shutdown(void *arg1, int arg2)
97{
98 module_t mod;
99
100 if (arg2 & RB_NOSYNC)
101 return;
102 mtx_lock(&Giant);
103 MOD_SLOCK;
104 TAILQ_FOREACH(mod, &modules, link)
105 MOD_EVENT(mod, MOD_SHUTDOWN);
106 MOD_SUNLOCK;
107 mtx_unlock(&Giant);
108}
109
110void
111module_register_init(const void *arg)
112{
113 const moduledata_t *data = (const moduledata_t *)arg;
114 int error;
115 module_t mod;
116
117 mtx_lock(&Giant);
118 MOD_SLOCK;
119 mod = module_lookupbyname(data->name);
120 if (mod == NULL)
121 panic("module_register_init: module named %s not found\n",
122 data->name);
123 MOD_SUNLOCK;
124 error = MOD_EVENT(mod, MOD_LOAD);
125 if (error) {
126 MOD_EVENT(mod, MOD_UNLOAD);
127 MOD_XLOCK;
128 module_release(mod);
129 MOD_XUNLOCK;
130 printf("module_register_init: MOD_LOAD (%s, %p, %p) error"
131 " %d\n", data->name, (void *)data->evhand, data->priv,
132 error);
133 } else {
134 MOD_XLOCK;
135 if (mod->file) {
136 /*
137 * Once a module is succesfully loaded, move
138 * it to the head of the module list for this
139 * linker file. This resorts the list so that
140 * when the kernel linker iterates over the
141 * modules to unload them, it will unload them
142 * in the reverse order they were loaded.
143 */
144 TAILQ_REMOVE(&mod->file->modules, mod, flink);
145 TAILQ_INSERT_HEAD(&mod->file->modules, mod, flink);
146 }
147 MOD_XUNLOCK;
148 }
149 mtx_unlock(&Giant);
150}
151
152int
153module_register(const moduledata_t *data, linker_file_t container)
154{
155 size_t namelen;
156 module_t newmod;
157
158 MOD_XLOCK;
159 newmod = module_lookupbyname(data->name);
160 if (newmod != NULL) {
161 MOD_XUNLOCK;
162 printf("module_register: module %s already exists!\n",
163 data->name);
164 return (EEXIST);
165 }
166 namelen = strlen(data->name) + 1;
167 newmod = malloc(sizeof(struct module) + namelen, M_MODULE, M_WAITOK);
168 if (newmod == NULL) {
169 MOD_XUNLOCK;
170 return (ENOMEM);
171 }
172 newmod->refs = 1;
173 newmod->id = nextid++;
174 newmod->name = (char *)(newmod + 1);
175 strcpy(newmod->name, data->name);
176 newmod->handler = data->evhand ? data->evhand : modevent_nop;
177 newmod->arg = data->priv;
178 bzero(&newmod->data, sizeof(newmod->data));
179 TAILQ_INSERT_TAIL(&modules, newmod, link);
180
181 if (container)
182 TAILQ_INSERT_TAIL(&container->modules, newmod, flink);
183 newmod->file = container;
184 MOD_XUNLOCK;
185 return (0);
186}
187
188void
189module_reference(module_t mod)
190{
191
192 MOD_XLOCK_ASSERT;
193
194 MOD_DPF(REFS, ("module_reference: before, refs=%d\n", mod->refs));
195 mod->refs++;
196}
197
198void
199module_release(module_t mod)
200{
201
202 MOD_XLOCK_ASSERT;
203
204 if (mod->refs <= 0)
205 panic("module_release: bad reference count");
206
207 MOD_DPF(REFS, ("module_release: before, refs=%d\n", mod->refs));
208
209 mod->refs--;
210 if (mod->refs == 0) {
211 TAILQ_REMOVE(&modules, mod, link);
212 if (mod->file)
213 TAILQ_REMOVE(&mod->file->modules, mod, flink);
214 free(mod, M_MODULE);
215 }
216}
217
218module_t
219module_lookupbyname(const char *name)
220{
221 module_t mod;
222 int err;
223
224 MOD_LOCK_ASSERT;
225
226 TAILQ_FOREACH(mod, &modules, link) {
227 err = strcmp(mod->name, name);
228 if (err == 0)
229 return (mod);
230 }
231 return (NULL);
232}
233
234module_t
235module_lookupbyid(int modid)
236{
237 module_t mod;
238
239 MOD_LOCK_ASSERT;
240
241 TAILQ_FOREACH(mod, &modules, link)
242 if (mod->id == modid)
243 return(mod);
244 return (NULL);
245}
246
247int
248module_quiesce(module_t mod)
249{
250 int error;
251
252 mtx_lock(&Giant);
253 error = MOD_EVENT(mod, MOD_QUIESCE);
254 mtx_unlock(&Giant);
255 if (error == EOPNOTSUPP || error == EINVAL)
256 error = 0;
257 return (error);
258}
259
260int
261module_unload(module_t mod)
262{
263 int error;
264
265 mtx_lock(&Giant);
266 error = MOD_EVENT(mod, MOD_UNLOAD);
267 mtx_unlock(&Giant);
268 return (error);
269}
270
271int
272module_getid(module_t mod)
273{
274
275 MOD_LOCK_ASSERT;
276 return (mod->id);
277}
278
279module_t
280module_getfnext(module_t mod)
281{
282
283 MOD_LOCK_ASSERT;
284 return (TAILQ_NEXT(mod, flink));
285}
286
287const char *
288module_getname(module_t mod)
289{
290
291 MOD_LOCK_ASSERT;
292 return (mod->name);
293}
294
295void
296module_setspecific(module_t mod, modspecific_t *datap)
297{
298
299 MOD_XLOCK_ASSERT;
300 mod->data = *datap;
301}
302
303linker_file_t
304module_file(module_t mod)
305{
306
307 return (mod->file);
308}
309
310/*
311 * Syscalls.
312 */
313int
314modnext(struct thread *td, struct modnext_args *uap)
315{
316 module_t mod;
317 int error = 0;
318
319 td->td_retval[0] = -1;
320
321 MOD_SLOCK;
322 if (uap->modid == 0) {
323 mod = TAILQ_FIRST(&modules);
324 if (mod)
325 td->td_retval[0] = mod->id;
326 else
327 error = ENOENT;
328 goto done2;
329 }
330 mod = module_lookupbyid(uap->modid);
331 if (mod == NULL) {
332 error = ENOENT;
333 goto done2;
334 }
335 if (TAILQ_NEXT(mod, link))
336 td->td_retval[0] = TAILQ_NEXT(mod, link)->id;
337 else
338 td->td_retval[0] = 0;
339done2:
340 MOD_SUNLOCK;
341 return (error);
342}
343
344int
345modfnext(struct thread *td, struct modfnext_args *uap)
346{
347 module_t mod;
348 int error;
349
350 td->td_retval[0] = -1;
351
352 MOD_SLOCK;
353 mod = module_lookupbyid(uap->modid);
354 if (mod == NULL) {
355 error = ENOENT;
356 } else {
357 error = 0;
358 if (TAILQ_NEXT(mod, flink))
359 td->td_retval[0] = TAILQ_NEXT(mod, flink)->id;
360 else
361 td->td_retval[0] = 0;
362 }
363 MOD_SUNLOCK;
364 return (error);
365}
366
367struct module_stat_v1 {
368 int version; /* set to sizeof(struct module_stat) */
369 char name[MAXMODNAME];
370 int refs;
371 int id;
372};
373
374int
375modstat(struct thread *td, struct modstat_args *uap)
376{
377 module_t mod;
378 modspecific_t data;
379 int error = 0;
380 int id, namelen, refs, version;
381 struct module_stat *stat;
382 char *name;
383
384 MOD_SLOCK;
385 mod = module_lookupbyid(uap->modid);
386 if (mod == NULL) {
387 MOD_SUNLOCK;
388 return (ENOENT);
389 }
390 id = mod->id;
391 refs = mod->refs;
392 name = mod->name;
393 data = mod->data;
394 MOD_SUNLOCK;
395 stat = uap->stat;
396
397 /*
398 * Check the version of the user's structure.
399 */
400 if ((error = copyin(&stat->version, &version, sizeof(version))) != 0)
401 return (error);
402 if (version != sizeof(struct module_stat_v1)
403 && version != sizeof(struct module_stat))
404 return (EINVAL);
405 namelen = strlen(mod->name) + 1;
406 if (namelen > MAXMODNAME)
407 namelen = MAXMODNAME;
408 if ((error = copyout(name, &stat->name[0], namelen)) != 0)
409 return (error);
410
411 if ((error = copyout(&refs, &stat->refs, sizeof(int))) != 0)
412 return (error);
413 if ((error = copyout(&id, &stat->id, sizeof(int))) != 0)
414 return (error);
415
416 /*
417 * >v1 stat includes module data.
418 */
419 if (version == sizeof(struct module_stat))
420 if ((error = copyout(&data, &stat->data,
421 sizeof(data))) != 0)
422 return (error);
423 td->td_retval[0] = 0;
424 return (error);
425}
426
427int
428modfind(struct thread *td, struct modfind_args *uap)
429{
430 int error = 0;
431 char name[MAXMODNAME];
432 module_t mod;
433
434 if ((error = copyinstr(uap->name, name, sizeof name, 0)) != 0)
435 return (error);
436
437 MOD_SLOCK;
438 mod = module_lookupbyname(name);
439 if (mod == NULL)
440 error = ENOENT;
441 else
442 td->td_retval[0] = module_getid(mod);
443 MOD_SUNLOCK;
444 return (error);
445}
446
447MODULE_VERSION(kernel, __FreeBSD_version);
448
449#ifdef COMPAT_FREEBSD32
450#include <sys/mount.h>
451#include <sys/socket.h>
452#include <compat/freebsd32/freebsd32_util.h>
453#include <compat/freebsd32/freebsd32.h>
454#include <compat/freebsd32/freebsd32_proto.h>
455
456typedef union modspecific32 {
457 int intval;
| 31
32#include <sys/param.h>
33#include <sys/kernel.h>
34#include <sys/systm.h>
35#include <sys/eventhandler.h>
36#include <sys/malloc.h>
37#include <sys/sysproto.h>
38#include <sys/sysent.h>
39#include <sys/proc.h>
40#include <sys/lock.h>
41#include <sys/mutex.h>
42#include <sys/reboot.h>
43#include <sys/sx.h>
44#include <sys/module.h>
45#include <sys/linker.h>
46
47static MALLOC_DEFINE(M_MODULE, "module", "module data structures");
48
49typedef TAILQ_HEAD(, module) modulelist_t;
50struct module {
51 TAILQ_ENTRY(module) link; /* chain together all modules */
52 TAILQ_ENTRY(module) flink; /* all modules in a file */
53 struct linker_file *file; /* file which contains this module */
54 int refs; /* reference count */
55 int id; /* unique id number */
56 char *name; /* module name */
57 modeventhand_t handler; /* event handler */
58 void *arg; /* argument for handler */
59 modspecific_t data; /* module specific data */
60};
61
62#define MOD_EVENT(mod, type) (mod)->handler((mod), (type), (mod)->arg)
63
64static modulelist_t modules;
65struct sx modules_sx;
66static int nextid = 1;
67static void module_shutdown(void *, int);
68
69static int
70modevent_nop(module_t mod, int what, void *arg)
71{
72
73 switch(what) {
74 case MOD_LOAD:
75 return (0);
76 case MOD_UNLOAD:
77 return (EBUSY);
78 default:
79 return (EOPNOTSUPP);
80 }
81}
82
83static void
84module_init(void *arg)
85{
86
87 sx_init(&modules_sx, "module subsystem sx lock");
88 TAILQ_INIT(&modules);
89 EVENTHANDLER_REGISTER(shutdown_final, module_shutdown, NULL,
90 SHUTDOWN_PRI_DEFAULT);
91}
92
93SYSINIT(module, SI_SUB_KLD, SI_ORDER_FIRST, module_init, 0);
94
95static void
96module_shutdown(void *arg1, int arg2)
97{
98 module_t mod;
99
100 if (arg2 & RB_NOSYNC)
101 return;
102 mtx_lock(&Giant);
103 MOD_SLOCK;
104 TAILQ_FOREACH(mod, &modules, link)
105 MOD_EVENT(mod, MOD_SHUTDOWN);
106 MOD_SUNLOCK;
107 mtx_unlock(&Giant);
108}
109
110void
111module_register_init(const void *arg)
112{
113 const moduledata_t *data = (const moduledata_t *)arg;
114 int error;
115 module_t mod;
116
117 mtx_lock(&Giant);
118 MOD_SLOCK;
119 mod = module_lookupbyname(data->name);
120 if (mod == NULL)
121 panic("module_register_init: module named %s not found\n",
122 data->name);
123 MOD_SUNLOCK;
124 error = MOD_EVENT(mod, MOD_LOAD);
125 if (error) {
126 MOD_EVENT(mod, MOD_UNLOAD);
127 MOD_XLOCK;
128 module_release(mod);
129 MOD_XUNLOCK;
130 printf("module_register_init: MOD_LOAD (%s, %p, %p) error"
131 " %d\n", data->name, (void *)data->evhand, data->priv,
132 error);
133 } else {
134 MOD_XLOCK;
135 if (mod->file) {
136 /*
137 * Once a module is succesfully loaded, move
138 * it to the head of the module list for this
139 * linker file. This resorts the list so that
140 * when the kernel linker iterates over the
141 * modules to unload them, it will unload them
142 * in the reverse order they were loaded.
143 */
144 TAILQ_REMOVE(&mod->file->modules, mod, flink);
145 TAILQ_INSERT_HEAD(&mod->file->modules, mod, flink);
146 }
147 MOD_XUNLOCK;
148 }
149 mtx_unlock(&Giant);
150}
151
152int
153module_register(const moduledata_t *data, linker_file_t container)
154{
155 size_t namelen;
156 module_t newmod;
157
158 MOD_XLOCK;
159 newmod = module_lookupbyname(data->name);
160 if (newmod != NULL) {
161 MOD_XUNLOCK;
162 printf("module_register: module %s already exists!\n",
163 data->name);
164 return (EEXIST);
165 }
166 namelen = strlen(data->name) + 1;
167 newmod = malloc(sizeof(struct module) + namelen, M_MODULE, M_WAITOK);
168 if (newmod == NULL) {
169 MOD_XUNLOCK;
170 return (ENOMEM);
171 }
172 newmod->refs = 1;
173 newmod->id = nextid++;
174 newmod->name = (char *)(newmod + 1);
175 strcpy(newmod->name, data->name);
176 newmod->handler = data->evhand ? data->evhand : modevent_nop;
177 newmod->arg = data->priv;
178 bzero(&newmod->data, sizeof(newmod->data));
179 TAILQ_INSERT_TAIL(&modules, newmod, link);
180
181 if (container)
182 TAILQ_INSERT_TAIL(&container->modules, newmod, flink);
183 newmod->file = container;
184 MOD_XUNLOCK;
185 return (0);
186}
187
188void
189module_reference(module_t mod)
190{
191
192 MOD_XLOCK_ASSERT;
193
194 MOD_DPF(REFS, ("module_reference: before, refs=%d\n", mod->refs));
195 mod->refs++;
196}
197
198void
199module_release(module_t mod)
200{
201
202 MOD_XLOCK_ASSERT;
203
204 if (mod->refs <= 0)
205 panic("module_release: bad reference count");
206
207 MOD_DPF(REFS, ("module_release: before, refs=%d\n", mod->refs));
208
209 mod->refs--;
210 if (mod->refs == 0) {
211 TAILQ_REMOVE(&modules, mod, link);
212 if (mod->file)
213 TAILQ_REMOVE(&mod->file->modules, mod, flink);
214 free(mod, M_MODULE);
215 }
216}
217
218module_t
219module_lookupbyname(const char *name)
220{
221 module_t mod;
222 int err;
223
224 MOD_LOCK_ASSERT;
225
226 TAILQ_FOREACH(mod, &modules, link) {
227 err = strcmp(mod->name, name);
228 if (err == 0)
229 return (mod);
230 }
231 return (NULL);
232}
233
234module_t
235module_lookupbyid(int modid)
236{
237 module_t mod;
238
239 MOD_LOCK_ASSERT;
240
241 TAILQ_FOREACH(mod, &modules, link)
242 if (mod->id == modid)
243 return(mod);
244 return (NULL);
245}
246
247int
248module_quiesce(module_t mod)
249{
250 int error;
251
252 mtx_lock(&Giant);
253 error = MOD_EVENT(mod, MOD_QUIESCE);
254 mtx_unlock(&Giant);
255 if (error == EOPNOTSUPP || error == EINVAL)
256 error = 0;
257 return (error);
258}
259
260int
261module_unload(module_t mod)
262{
263 int error;
264
265 mtx_lock(&Giant);
266 error = MOD_EVENT(mod, MOD_UNLOAD);
267 mtx_unlock(&Giant);
268 return (error);
269}
270
271int
272module_getid(module_t mod)
273{
274
275 MOD_LOCK_ASSERT;
276 return (mod->id);
277}
278
279module_t
280module_getfnext(module_t mod)
281{
282
283 MOD_LOCK_ASSERT;
284 return (TAILQ_NEXT(mod, flink));
285}
286
287const char *
288module_getname(module_t mod)
289{
290
291 MOD_LOCK_ASSERT;
292 return (mod->name);
293}
294
295void
296module_setspecific(module_t mod, modspecific_t *datap)
297{
298
299 MOD_XLOCK_ASSERT;
300 mod->data = *datap;
301}
302
303linker_file_t
304module_file(module_t mod)
305{
306
307 return (mod->file);
308}
309
310/*
311 * Syscalls.
312 */
313int
314modnext(struct thread *td, struct modnext_args *uap)
315{
316 module_t mod;
317 int error = 0;
318
319 td->td_retval[0] = -1;
320
321 MOD_SLOCK;
322 if (uap->modid == 0) {
323 mod = TAILQ_FIRST(&modules);
324 if (mod)
325 td->td_retval[0] = mod->id;
326 else
327 error = ENOENT;
328 goto done2;
329 }
330 mod = module_lookupbyid(uap->modid);
331 if (mod == NULL) {
332 error = ENOENT;
333 goto done2;
334 }
335 if (TAILQ_NEXT(mod, link))
336 td->td_retval[0] = TAILQ_NEXT(mod, link)->id;
337 else
338 td->td_retval[0] = 0;
339done2:
340 MOD_SUNLOCK;
341 return (error);
342}
343
344int
345modfnext(struct thread *td, struct modfnext_args *uap)
346{
347 module_t mod;
348 int error;
349
350 td->td_retval[0] = -1;
351
352 MOD_SLOCK;
353 mod = module_lookupbyid(uap->modid);
354 if (mod == NULL) {
355 error = ENOENT;
356 } else {
357 error = 0;
358 if (TAILQ_NEXT(mod, flink))
359 td->td_retval[0] = TAILQ_NEXT(mod, flink)->id;
360 else
361 td->td_retval[0] = 0;
362 }
363 MOD_SUNLOCK;
364 return (error);
365}
366
367struct module_stat_v1 {
368 int version; /* set to sizeof(struct module_stat) */
369 char name[MAXMODNAME];
370 int refs;
371 int id;
372};
373
374int
375modstat(struct thread *td, struct modstat_args *uap)
376{
377 module_t mod;
378 modspecific_t data;
379 int error = 0;
380 int id, namelen, refs, version;
381 struct module_stat *stat;
382 char *name;
383
384 MOD_SLOCK;
385 mod = module_lookupbyid(uap->modid);
386 if (mod == NULL) {
387 MOD_SUNLOCK;
388 return (ENOENT);
389 }
390 id = mod->id;
391 refs = mod->refs;
392 name = mod->name;
393 data = mod->data;
394 MOD_SUNLOCK;
395 stat = uap->stat;
396
397 /*
398 * Check the version of the user's structure.
399 */
400 if ((error = copyin(&stat->version, &version, sizeof(version))) != 0)
401 return (error);
402 if (version != sizeof(struct module_stat_v1)
403 && version != sizeof(struct module_stat))
404 return (EINVAL);
405 namelen = strlen(mod->name) + 1;
406 if (namelen > MAXMODNAME)
407 namelen = MAXMODNAME;
408 if ((error = copyout(name, &stat->name[0], namelen)) != 0)
409 return (error);
410
411 if ((error = copyout(&refs, &stat->refs, sizeof(int))) != 0)
412 return (error);
413 if ((error = copyout(&id, &stat->id, sizeof(int))) != 0)
414 return (error);
415
416 /*
417 * >v1 stat includes module data.
418 */
419 if (version == sizeof(struct module_stat))
420 if ((error = copyout(&data, &stat->data,
421 sizeof(data))) != 0)
422 return (error);
423 td->td_retval[0] = 0;
424 return (error);
425}
426
427int
428modfind(struct thread *td, struct modfind_args *uap)
429{
430 int error = 0;
431 char name[MAXMODNAME];
432 module_t mod;
433
434 if ((error = copyinstr(uap->name, name, sizeof name, 0)) != 0)
435 return (error);
436
437 MOD_SLOCK;
438 mod = module_lookupbyname(name);
439 if (mod == NULL)
440 error = ENOENT;
441 else
442 td->td_retval[0] = module_getid(mod);
443 MOD_SUNLOCK;
444 return (error);
445}
446
447MODULE_VERSION(kernel, __FreeBSD_version);
448
449#ifdef COMPAT_FREEBSD32
450#include <sys/mount.h>
451#include <sys/socket.h>
452#include <compat/freebsd32/freebsd32_util.h>
453#include <compat/freebsd32/freebsd32.h>
454#include <compat/freebsd32/freebsd32_proto.h>
455
456typedef union modspecific32 {
457 int intval;
|
461} modspecific32_t;
462
463struct module_stat32 {
464 int version;
465 char name[MAXMODNAME];
466 int refs;
467 int id;
468 modspecific32_t data;
469};
470
471int
472freebsd32_modstat(struct thread *td, struct freebsd32_modstat_args *uap)
473{
474 module_t mod;
475 modspecific32_t data32;
476 int error = 0;
477 int id, namelen, refs, version;
478 struct module_stat32 *stat32;
479 char *name;
480
481 MOD_SLOCK;
482 mod = module_lookupbyid(uap->modid);
483 if (mod == NULL) {
484 MOD_SUNLOCK;
485 return (ENOENT);
486 }
487
488 id = mod->id;
489 refs = mod->refs;
490 name = mod->name;
491 CP(mod->data, data32, intval);
492 CP(mod->data, data32, uintval);
493 CP(mod->data, data32, longval);
494 CP(mod->data, data32, ulongval);
495 MOD_SUNLOCK;
496 stat32 = uap->stat;
497
498 if ((error = copyin(&stat32->version, &version, sizeof(version))) != 0)
499 return (error);
500 if (version != sizeof(struct module_stat_v1)
501 && version != sizeof(struct module_stat32))
502 return (EINVAL);
503 namelen = strlen(mod->name) + 1;
504 if (namelen > MAXMODNAME)
505 namelen = MAXMODNAME;
506 if ((error = copyout(name, &stat32->name[0], namelen)) != 0)
507 return (error);
508
509 if ((error = copyout(&refs, &stat32->refs, sizeof(int))) != 0)
510 return (error);
511 if ((error = copyout(&id, &stat32->id, sizeof(int))) != 0)
512 return (error);
513
514 /*
515 * >v1 stat includes module data.
516 */
517 if (version == sizeof(struct module_stat32))
518 if ((error = copyout(&data32, &stat32->data,
519 sizeof(data32))) != 0)
520 return (error);
521 td->td_retval[0] = 0;
522 return (error);
523}
524#endif
| 461} modspecific32_t;
462
463struct module_stat32 {
464 int version;
465 char name[MAXMODNAME];
466 int refs;
467 int id;
468 modspecific32_t data;
469};
470
471int
472freebsd32_modstat(struct thread *td, struct freebsd32_modstat_args *uap)
473{
474 module_t mod;
475 modspecific32_t data32;
476 int error = 0;
477 int id, namelen, refs, version;
478 struct module_stat32 *stat32;
479 char *name;
480
481 MOD_SLOCK;
482 mod = module_lookupbyid(uap->modid);
483 if (mod == NULL) {
484 MOD_SUNLOCK;
485 return (ENOENT);
486 }
487
488 id = mod->id;
489 refs = mod->refs;
490 name = mod->name;
491 CP(mod->data, data32, intval);
492 CP(mod->data, data32, uintval);
493 CP(mod->data, data32, longval);
494 CP(mod->data, data32, ulongval);
495 MOD_SUNLOCK;
496 stat32 = uap->stat;
497
498 if ((error = copyin(&stat32->version, &version, sizeof(version))) != 0)
499 return (error);
500 if (version != sizeof(struct module_stat_v1)
501 && version != sizeof(struct module_stat32))
502 return (EINVAL);
503 namelen = strlen(mod->name) + 1;
504 if (namelen > MAXMODNAME)
505 namelen = MAXMODNAME;
506 if ((error = copyout(name, &stat32->name[0], namelen)) != 0)
507 return (error);
508
509 if ((error = copyout(&refs, &stat32->refs, sizeof(int))) != 0)
510 return (error);
511 if ((error = copyout(&id, &stat32->id, sizeof(int))) != 0)
512 return (error);
513
514 /*
515 * >v1 stat includes module data.
516 */
517 if (version == sizeof(struct module_stat32))
518 if ((error = copyout(&data32, &stat32->data,
519 sizeof(data32))) != 0)
520 return (error);
521 td->td_retval[0] = 0;
522 return (error);
523}
524#endif
|