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f1ca4da6 | 1 | /* |
715f6251 | 2 | * This file is part of the SPL: Solaris Porting Layer. |
3 | * | |
4 | * Copyright (c) 2008 Lawrence Livermore National Security, LLC. | |
5 | * Produced at Lawrence Livermore National Laboratory | |
6 | * Written by: | |
7 | * Brian Behlendorf <behlendorf1@llnl.gov>, | |
8 | * Herb Wartens <wartens2@llnl.gov>, | |
9 | * Jim Garlick <garlick@llnl.gov> | |
10 | * UCRL-CODE-235197 | |
11 | * | |
12 | * This is free software; you can redistribute it and/or modify it | |
13 | * under the terms of the GNU General Public License as published by | |
14 | * the Free Software Foundation; either version 2 of the License, or | |
15 | * (at your option) any later version. | |
16 | * | |
17 | * This is distributed in the hope that it will be useful, but WITHOUT | |
18 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
19 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
20 | * for more details. | |
21 | * | |
22 | * You should have received a copy of the GNU General Public License along | |
23 | * with this program; if not, write to the Free Software Foundation, Inc., | |
24 | * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. | |
25 | */ | |
26 | ||
27 | /* | |
28 | * My intent is to create a loadable 'splat' (Solaris Porting LAyer | |
29 | * Tests) module which can be used as an access point to run | |
30 | * in kernel Solaris ABI regression tests. This provides a | |
7c50328b | 31 | * nice mechanism to validate the shim primates are working properly. |
f1ca4da6 | 32 | * |
7c50328b | 33 | * The basic design is the splat module is that it is constructed of |
34 | * various splat_* source files each of which contains regression tests. | |
35 | * For example the splat_linux_kmem.c file contains tests for validating | |
36 | * kmem correctness. When the splat module is loaded splat_*_init() | |
37 | * will be called for each subsystems tests, similarly splat_*_fini() is | |
38 | * called when the splat module is removed. Each test can then be | |
f1ca4da6 | 39 | * run by making an ioctl() call from a userspace control application |
40 | * to pick the subsystem and test which should be run. | |
f1ca4da6 | 41 | */ |
42 | ||
7c50328b | 43 | #include "splat-internal.h" |
f1ca4da6 | 44 | |
46c685d0 | 45 | static spl_class *splat_class; |
25557fd8 | 46 | static spl_device *splat_device; |
7c50328b | 47 | static struct list_head splat_module_list; |
48 | static spinlock_t splat_module_lock; | |
f1ca4da6 | 49 | |
50 | static int | |
7c50328b | 51 | splat_open(struct inode *inode, struct file *file) |
f1ca4da6 | 52 | { |
53 | unsigned int minor = iminor(inode); | |
7c50328b | 54 | splat_info_t *info; |
f1ca4da6 | 55 | |
7c50328b | 56 | if (minor >= SPLAT_MINORS) |
f1ca4da6 | 57 | return -ENXIO; |
58 | ||
7c50328b | 59 | info = (splat_info_t *)kmalloc(sizeof(*info), GFP_KERNEL); |
f1ca4da6 | 60 | if (info == NULL) |
61 | return -ENOMEM; | |
62 | ||
63 | spin_lock_init(&info->info_lock); | |
7c50328b | 64 | info->info_size = SPLAT_INFO_BUFFER_SIZE; |
65 | info->info_buffer = (char *)vmalloc(SPLAT_INFO_BUFFER_SIZE); | |
f1ca4da6 | 66 | if (info->info_buffer == NULL) { |
67 | kfree(info); | |
68 | return -ENOMEM; | |
69 | } | |
70 | ||
71 | info->info_head = info->info_buffer; | |
72 | file->private_data = (void *)info; | |
73 | ||
f1ca4da6 | 74 | return 0; |
75 | } | |
76 | ||
77 | static int | |
7c50328b | 78 | splat_release(struct inode *inode, struct file *file) |
f1ca4da6 | 79 | { |
80 | unsigned int minor = iminor(inode); | |
7c50328b | 81 | splat_info_t *info = (splat_info_t *)file->private_data; |
f1ca4da6 | 82 | |
7c50328b | 83 | if (minor >= SPLAT_MINORS) |
f1ca4da6 | 84 | return -ENXIO; |
85 | ||
86 | ASSERT(info); | |
87 | ASSERT(info->info_buffer); | |
88 | ||
89 | vfree(info->info_buffer); | |
90 | kfree(info); | |
91 | ||
92 | return 0; | |
93 | } | |
94 | ||
95 | static int | |
7c50328b | 96 | splat_buffer_clear(struct file *file, splat_cfg_t *kcfg, unsigned long arg) |
f1ca4da6 | 97 | { |
7c50328b | 98 | splat_info_t *info = (splat_info_t *)file->private_data; |
f1ca4da6 | 99 | |
100 | ASSERT(info); | |
101 | ASSERT(info->info_buffer); | |
102 | ||
103 | spin_lock(&info->info_lock); | |
104 | memset(info->info_buffer, 0, info->info_size); | |
105 | info->info_head = info->info_buffer; | |
106 | spin_unlock(&info->info_lock); | |
107 | ||
108 | return 0; | |
109 | } | |
110 | ||
111 | static int | |
7c50328b | 112 | splat_buffer_size(struct file *file, splat_cfg_t *kcfg, unsigned long arg) |
f1ca4da6 | 113 | { |
7c50328b | 114 | splat_info_t *info = (splat_info_t *)file->private_data; |
f1ca4da6 | 115 | char *buf; |
116 | int min, size, rc = 0; | |
117 | ||
118 | ASSERT(info); | |
119 | ASSERT(info->info_buffer); | |
120 | ||
121 | spin_lock(&info->info_lock); | |
122 | if (kcfg->cfg_arg1 > 0) { | |
123 | ||
124 | size = kcfg->cfg_arg1; | |
125 | buf = (char *)vmalloc(size); | |
126 | if (buf == NULL) { | |
127 | rc = -ENOMEM; | |
128 | goto out; | |
129 | } | |
130 | ||
131 | /* Zero fill and truncate contents when coping buffer */ | |
132 | min = ((size < info->info_size) ? size : info->info_size); | |
133 | memset(buf, 0, size); | |
134 | memcpy(buf, info->info_buffer, min); | |
135 | vfree(info->info_buffer); | |
136 | info->info_size = size; | |
137 | info->info_buffer = buf; | |
138 | info->info_head = info->info_buffer; | |
139 | } | |
140 | ||
141 | kcfg->cfg_rc1 = info->info_size; | |
142 | ||
7c50328b | 143 | if (copy_to_user((struct splat_cfg_t __user *)arg, kcfg, sizeof(*kcfg))) |
f1ca4da6 | 144 | rc = -EFAULT; |
145 | out: | |
146 | spin_unlock(&info->info_lock); | |
147 | ||
148 | return rc; | |
149 | } | |
150 | ||
151 | ||
7c50328b | 152 | static splat_subsystem_t * |
153 | splat_subsystem_find(int id) { | |
154 | splat_subsystem_t *sub; | |
f1ca4da6 | 155 | |
7c50328b | 156 | spin_lock(&splat_module_lock); |
157 | list_for_each_entry(sub, &splat_module_list, subsystem_list) { | |
f1ca4da6 | 158 | if (id == sub->desc.id) { |
7c50328b | 159 | spin_unlock(&splat_module_lock); |
f1ca4da6 | 160 | return sub; |
161 | } | |
162 | } | |
7c50328b | 163 | spin_unlock(&splat_module_lock); |
f1ca4da6 | 164 | |
165 | return NULL; | |
166 | } | |
167 | ||
168 | static int | |
7c50328b | 169 | splat_subsystem_count(splat_cfg_t *kcfg, unsigned long arg) |
f1ca4da6 | 170 | { |
7c50328b | 171 | splat_subsystem_t *sub; |
f1ca4da6 | 172 | int i = 0; |
173 | ||
7c50328b | 174 | spin_lock(&splat_module_lock); |
175 | list_for_each_entry(sub, &splat_module_list, subsystem_list) | |
f1ca4da6 | 176 | i++; |
177 | ||
7c50328b | 178 | spin_unlock(&splat_module_lock); |
f1ca4da6 | 179 | kcfg->cfg_rc1 = i; |
180 | ||
7c50328b | 181 | if (copy_to_user((struct splat_cfg_t __user *)arg, kcfg, sizeof(*kcfg))) |
f1ca4da6 | 182 | return -EFAULT; |
183 | ||
184 | return 0; | |
185 | } | |
186 | ||
187 | static int | |
7c50328b | 188 | splat_subsystem_list(splat_cfg_t *kcfg, unsigned long arg) |
f1ca4da6 | 189 | { |
7c50328b | 190 | splat_subsystem_t *sub; |
191 | splat_cfg_t *tmp; | |
f1ca4da6 | 192 | int size, i = 0; |
193 | ||
194 | /* Structure will be sized large enough for N subsystem entries | |
195 | * which is passed in by the caller. On exit the number of | |
196 | * entries filled in with valid subsystems will be stored in | |
197 | * cfg_rc1. If the caller does not provide enough entries | |
198 | * for all subsystems we will truncate the list to avoid overrun. | |
199 | */ | |
7c50328b | 200 | size = sizeof(*tmp) + kcfg->cfg_data.splat_subsystems.size * |
201 | sizeof(splat_user_t); | |
f1ca4da6 | 202 | tmp = kmalloc(size, GFP_KERNEL); |
203 | if (tmp == NULL) | |
204 | return -ENOMEM; | |
205 | ||
206 | /* Local 'tmp' is used as the structure copied back to user space */ | |
207 | memset(tmp, 0, size); | |
208 | memcpy(tmp, kcfg, sizeof(*kcfg)); | |
209 | ||
7c50328b | 210 | spin_lock(&splat_module_lock); |
211 | list_for_each_entry(sub, &splat_module_list, subsystem_list) { | |
212 | strncpy(tmp->cfg_data.splat_subsystems.descs[i].name, | |
213 | sub->desc.name, SPLAT_NAME_SIZE); | |
214 | strncpy(tmp->cfg_data.splat_subsystems.descs[i].desc, | |
215 | sub->desc.desc, SPLAT_DESC_SIZE); | |
216 | tmp->cfg_data.splat_subsystems.descs[i].id = sub->desc.id; | |
f1ca4da6 | 217 | |
218 | /* Truncate list if we are about to overrun alloc'ed memory */ | |
7c50328b | 219 | if ((i++) == kcfg->cfg_data.splat_subsystems.size) |
f1ca4da6 | 220 | break; |
221 | } | |
7c50328b | 222 | spin_unlock(&splat_module_lock); |
f1ca4da6 | 223 | tmp->cfg_rc1 = i; |
224 | ||
7c50328b | 225 | if (copy_to_user((struct splat_cfg_t __user *)arg, tmp, size)) { |
f1ca4da6 | 226 | kfree(tmp); |
227 | return -EFAULT; | |
228 | } | |
229 | ||
230 | kfree(tmp); | |
231 | return 0; | |
232 | } | |
233 | ||
234 | static int | |
7c50328b | 235 | splat_test_count(splat_cfg_t *kcfg, unsigned long arg) |
f1ca4da6 | 236 | { |
7c50328b | 237 | splat_subsystem_t *sub; |
238 | splat_test_t *test; | |
f1b59d26 | 239 | int i = 0; |
f1ca4da6 | 240 | |
241 | /* Subsystem ID passed as arg1 */ | |
7c50328b | 242 | sub = splat_subsystem_find(kcfg->cfg_arg1); |
f1ca4da6 | 243 | if (sub == NULL) |
244 | return -EINVAL; | |
245 | ||
246 | spin_lock(&(sub->test_lock)); | |
247 | list_for_each_entry(test, &(sub->test_list), test_list) | |
248 | i++; | |
249 | ||
250 | spin_unlock(&(sub->test_lock)); | |
251 | kcfg->cfg_rc1 = i; | |
252 | ||
7c50328b | 253 | if (copy_to_user((struct splat_cfg_t __user *)arg, kcfg, sizeof(*kcfg))) |
f1ca4da6 | 254 | return -EFAULT; |
255 | ||
256 | return 0; | |
257 | } | |
258 | ||
259 | static int | |
7c50328b | 260 | splat_test_list(splat_cfg_t *kcfg, unsigned long arg) |
f1ca4da6 | 261 | { |
7c50328b | 262 | splat_subsystem_t *sub; |
263 | splat_test_t *test; | |
264 | splat_cfg_t *tmp; | |
f1b59d26 | 265 | int size, i = 0; |
f1ca4da6 | 266 | |
267 | /* Subsystem ID passed as arg1 */ | |
7c50328b | 268 | sub = splat_subsystem_find(kcfg->cfg_arg1); |
f1ca4da6 | 269 | if (sub == NULL) |
270 | return -EINVAL; | |
271 | ||
272 | /* Structure will be sized large enough for N test entries | |
273 | * which is passed in by the caller. On exit the number of | |
274 | * entries filled in with valid tests will be stored in | |
275 | * cfg_rc1. If the caller does not provide enough entries | |
276 | * for all tests we will truncate the list to avoid overrun. | |
277 | */ | |
7c50328b | 278 | size = sizeof(*tmp)+kcfg->cfg_data.splat_tests.size*sizeof(splat_user_t); |
f1ca4da6 | 279 | tmp = kmalloc(size, GFP_KERNEL); |
280 | if (tmp == NULL) | |
281 | return -ENOMEM; | |
282 | ||
283 | /* Local 'tmp' is used as the structure copied back to user space */ | |
284 | memset(tmp, 0, size); | |
285 | memcpy(tmp, kcfg, sizeof(*kcfg)); | |
286 | ||
287 | spin_lock(&(sub->test_lock)); | |
288 | list_for_each_entry(test, &(sub->test_list), test_list) { | |
7c50328b | 289 | strncpy(tmp->cfg_data.splat_tests.descs[i].name, |
290 | test->desc.name, SPLAT_NAME_SIZE); | |
291 | strncpy(tmp->cfg_data.splat_tests.descs[i].desc, | |
292 | test->desc.desc, SPLAT_DESC_SIZE); | |
293 | tmp->cfg_data.splat_tests.descs[i].id = test->desc.id; | |
f1ca4da6 | 294 | |
295 | /* Truncate list if we are about to overrun alloc'ed memory */ | |
7c50328b | 296 | if ((i++) == kcfg->cfg_data.splat_tests.size) |
f1ca4da6 | 297 | break; |
298 | } | |
299 | spin_unlock(&(sub->test_lock)); | |
300 | tmp->cfg_rc1 = i; | |
301 | ||
7c50328b | 302 | if (copy_to_user((struct splat_cfg_t __user *)arg, tmp, size)) { |
f1ca4da6 | 303 | kfree(tmp); |
304 | return -EFAULT; | |
305 | } | |
306 | ||
307 | kfree(tmp); | |
308 | return 0; | |
309 | } | |
310 | ||
311 | static int | |
7c50328b | 312 | splat_validate(struct file *file, splat_subsystem_t *sub, int cmd, void *arg) |
f1ca4da6 | 313 | { |
7c50328b | 314 | splat_test_t *test; |
f1ca4da6 | 315 | |
316 | spin_lock(&(sub->test_lock)); | |
317 | list_for_each_entry(test, &(sub->test_list), test_list) { | |
318 | if (test->desc.id == cmd) { | |
319 | spin_unlock(&(sub->test_lock)); | |
320 | return test->test(file, arg); | |
321 | } | |
322 | } | |
323 | spin_unlock(&(sub->test_lock)); | |
324 | ||
325 | return -EINVAL; | |
326 | } | |
327 | ||
328 | static int | |
7c50328b | 329 | splat_ioctl_cfg(struct file *file, unsigned long arg) |
f1ca4da6 | 330 | { |
7c50328b | 331 | splat_cfg_t kcfg; |
f1ca4da6 | 332 | int rc = 0; |
333 | ||
7c50328b | 334 | if (copy_from_user(&kcfg, (splat_cfg_t *)arg, sizeof(kcfg))) |
f1ca4da6 | 335 | return -EFAULT; |
336 | ||
7c50328b | 337 | if (kcfg.cfg_magic != SPLAT_CFG_MAGIC) { |
338 | splat_print(file, "Bad config magic 0x%x != 0x%x\n", | |
339 | kcfg.cfg_magic, SPLAT_CFG_MAGIC); | |
f1ca4da6 | 340 | return -EINVAL; |
341 | } | |
342 | ||
343 | switch (kcfg.cfg_cmd) { | |
7c50328b | 344 | case SPLAT_CFG_BUFFER_CLEAR: |
f1ca4da6 | 345 | /* cfg_arg1 - Unused |
346 | * cfg_rc1 - Unused | |
347 | */ | |
7c50328b | 348 | rc = splat_buffer_clear(file, &kcfg, arg); |
f1ca4da6 | 349 | break; |
7c50328b | 350 | case SPLAT_CFG_BUFFER_SIZE: |
f1ca4da6 | 351 | /* cfg_arg1 - 0 - query size; >0 resize |
352 | * cfg_rc1 - Set to current buffer size | |
353 | */ | |
7c50328b | 354 | rc = splat_buffer_size(file, &kcfg, arg); |
f1ca4da6 | 355 | break; |
7c50328b | 356 | case SPLAT_CFG_SUBSYSTEM_COUNT: |
f1ca4da6 | 357 | /* cfg_arg1 - Unused |
358 | * cfg_rc1 - Set to number of subsystems | |
359 | */ | |
7c50328b | 360 | rc = splat_subsystem_count(&kcfg, arg); |
f1ca4da6 | 361 | break; |
7c50328b | 362 | case SPLAT_CFG_SUBSYSTEM_LIST: |
f1ca4da6 | 363 | /* cfg_arg1 - Unused |
364 | * cfg_rc1 - Set to number of subsystems | |
7c50328b | 365 | * cfg_data.splat_subsystems - Populated with subsystems |
f1ca4da6 | 366 | */ |
7c50328b | 367 | rc = splat_subsystem_list(&kcfg, arg); |
f1ca4da6 | 368 | break; |
7c50328b | 369 | case SPLAT_CFG_TEST_COUNT: |
f1ca4da6 | 370 | /* cfg_arg1 - Set to a target subsystem |
371 | * cfg_rc1 - Set to number of tests | |
372 | */ | |
7c50328b | 373 | rc = splat_test_count(&kcfg, arg); |
f1ca4da6 | 374 | break; |
7c50328b | 375 | case SPLAT_CFG_TEST_LIST: |
f1ca4da6 | 376 | /* cfg_arg1 - Set to a target subsystem |
377 | * cfg_rc1 - Set to number of tests | |
7c50328b | 378 | * cfg_data.splat_subsystems - Populated with tests |
f1ca4da6 | 379 | */ |
7c50328b | 380 | rc = splat_test_list(&kcfg, arg); |
f1ca4da6 | 381 | break; |
382 | default: | |
7c50328b | 383 | splat_print(file, "Bad config command %d\n", kcfg.cfg_cmd); |
f1ca4da6 | 384 | rc = -EINVAL; |
385 | break; | |
386 | } | |
387 | ||
388 | return rc; | |
389 | } | |
390 | ||
391 | static int | |
7c50328b | 392 | splat_ioctl_cmd(struct file *file, unsigned long arg) |
f1ca4da6 | 393 | { |
7c50328b | 394 | splat_subsystem_t *sub; |
395 | splat_cmd_t kcmd; | |
f1ca4da6 | 396 | int rc = -EINVAL; |
397 | void *data = NULL; | |
398 | ||
7c50328b | 399 | if (copy_from_user(&kcmd, (splat_cfg_t *)arg, sizeof(kcmd))) |
f1ca4da6 | 400 | return -EFAULT; |
401 | ||
7c50328b | 402 | if (kcmd.cmd_magic != SPLAT_CMD_MAGIC) { |
403 | splat_print(file, "Bad command magic 0x%x != 0x%x\n", | |
404 | kcmd.cmd_magic, SPLAT_CFG_MAGIC); | |
f1ca4da6 | 405 | return -EINVAL; |
406 | } | |
407 | ||
408 | /* Allocate memory for any opaque data the caller needed to pass on */ | |
409 | if (kcmd.cmd_data_size > 0) { | |
410 | data = (void *)kmalloc(kcmd.cmd_data_size, GFP_KERNEL); | |
411 | if (data == NULL) | |
412 | return -ENOMEM; | |
413 | ||
7c50328b | 414 | if (copy_from_user(data, (void *)(arg + offsetof(splat_cmd_t, |
f1ca4da6 | 415 | cmd_data_str)), kcmd.cmd_data_size)) { |
416 | kfree(data); | |
417 | return -EFAULT; | |
418 | } | |
419 | } | |
420 | ||
7c50328b | 421 | sub = splat_subsystem_find(kcmd.cmd_subsystem); |
f1ca4da6 | 422 | if (sub != NULL) |
7c50328b | 423 | rc = splat_validate(file, sub, kcmd.cmd_test, data); |
f1ca4da6 | 424 | else |
425 | rc = -EINVAL; | |
426 | ||
427 | if (data != NULL) | |
428 | kfree(data); | |
429 | ||
430 | return rc; | |
431 | } | |
432 | ||
433 | static int | |
7c50328b | 434 | splat_ioctl(struct inode *inode, struct file *file, |
f1ca4da6 | 435 | unsigned int cmd, unsigned long arg) |
436 | { | |
f1b59d26 | 437 | unsigned int minor = iminor(file->f_dentry->d_inode); |
438 | int rc = 0; | |
f1ca4da6 | 439 | |
440 | /* Ignore tty ioctls */ | |
441 | if ((cmd & 0xffffff00) == ((int)'T') << 8) | |
442 | return -ENOTTY; | |
443 | ||
7c50328b | 444 | if (minor >= SPLAT_MINORS) |
f1ca4da6 | 445 | return -ENXIO; |
446 | ||
447 | switch (cmd) { | |
7c50328b | 448 | case SPLAT_CFG: |
449 | rc = splat_ioctl_cfg(file, arg); | |
f1ca4da6 | 450 | break; |
7c50328b | 451 | case SPLAT_CMD: |
452 | rc = splat_ioctl_cmd(file, arg); | |
f1ca4da6 | 453 | break; |
454 | default: | |
7c50328b | 455 | splat_print(file, "Bad ioctl command %d\n", cmd); |
f1ca4da6 | 456 | rc = -EINVAL; |
457 | break; | |
458 | } | |
459 | ||
460 | return rc; | |
461 | } | |
462 | ||
463 | /* I'm not sure why you would want to write in to this buffer from | |
464 | * user space since its principle use is to pass test status info | |
465 | * back to the user space, but I don't see any reason to prevent it. | |
466 | */ | |
7c50328b | 467 | static ssize_t splat_write(struct file *file, const char __user *buf, |
f1ca4da6 | 468 | size_t count, loff_t *ppos) |
469 | { | |
470 | unsigned int minor = iminor(file->f_dentry->d_inode); | |
7c50328b | 471 | splat_info_t *info = (splat_info_t *)file->private_data; |
f1ca4da6 | 472 | int rc = 0; |
473 | ||
7c50328b | 474 | if (minor >= SPLAT_MINORS) |
f1ca4da6 | 475 | return -ENXIO; |
476 | ||
477 | ASSERT(info); | |
478 | ASSERT(info->info_buffer); | |
479 | ||
480 | spin_lock(&info->info_lock); | |
481 | ||
482 | /* Write beyond EOF */ | |
483 | if (*ppos >= info->info_size) { | |
484 | rc = -EFBIG; | |
485 | goto out; | |
486 | } | |
487 | ||
488 | /* Resize count if beyond EOF */ | |
489 | if (*ppos + count > info->info_size) | |
490 | count = info->info_size - *ppos; | |
491 | ||
492 | if (copy_from_user(info->info_buffer, buf, count)) { | |
493 | rc = -EFAULT; | |
494 | goto out; | |
495 | } | |
496 | ||
497 | *ppos += count; | |
498 | rc = count; | |
499 | out: | |
500 | spin_unlock(&info->info_lock); | |
501 | return rc; | |
502 | } | |
503 | ||
7c50328b | 504 | static ssize_t splat_read(struct file *file, char __user *buf, |
f1ca4da6 | 505 | size_t count, loff_t *ppos) |
506 | { | |
507 | unsigned int minor = iminor(file->f_dentry->d_inode); | |
7c50328b | 508 | splat_info_t *info = (splat_info_t *)file->private_data; |
f1ca4da6 | 509 | int rc = 0; |
510 | ||
7c50328b | 511 | if (minor >= SPLAT_MINORS) |
f1ca4da6 | 512 | return -ENXIO; |
513 | ||
514 | ASSERT(info); | |
515 | ASSERT(info->info_buffer); | |
516 | ||
517 | spin_lock(&info->info_lock); | |
518 | ||
519 | /* Read beyond EOF */ | |
520 | if (*ppos >= info->info_size) | |
521 | goto out; | |
522 | ||
523 | /* Resize count if beyond EOF */ | |
524 | if (*ppos + count > info->info_size) | |
525 | count = info->info_size - *ppos; | |
526 | ||
527 | if (copy_to_user(buf, info->info_buffer + *ppos, count)) { | |
528 | rc = -EFAULT; | |
529 | goto out; | |
530 | } | |
531 | ||
532 | *ppos += count; | |
533 | rc = count; | |
534 | out: | |
535 | spin_unlock(&info->info_lock); | |
536 | return rc; | |
537 | } | |
538 | ||
7c50328b | 539 | static loff_t splat_seek(struct file *file, loff_t offset, int origin) |
f1ca4da6 | 540 | { |
541 | unsigned int minor = iminor(file->f_dentry->d_inode); | |
7c50328b | 542 | splat_info_t *info = (splat_info_t *)file->private_data; |
f1ca4da6 | 543 | int rc = -EINVAL; |
544 | ||
7c50328b | 545 | if (minor >= SPLAT_MINORS) |
f1ca4da6 | 546 | return -ENXIO; |
547 | ||
548 | ASSERT(info); | |
549 | ASSERT(info->info_buffer); | |
550 | ||
551 | spin_lock(&info->info_lock); | |
552 | ||
553 | switch (origin) { | |
554 | case 0: /* SEEK_SET - No-op just do it */ | |
555 | break; | |
556 | case 1: /* SEEK_CUR - Seek from current */ | |
557 | offset = file->f_pos + offset; | |
558 | break; | |
559 | case 2: /* SEEK_END - Seek from end */ | |
560 | offset = info->info_size + offset; | |
561 | break; | |
562 | } | |
563 | ||
564 | if (offset >= 0) { | |
565 | file->f_pos = offset; | |
566 | file->f_version = 0; | |
567 | rc = offset; | |
568 | } | |
569 | ||
570 | spin_unlock(&info->info_lock); | |
571 | ||
572 | return rc; | |
573 | } | |
574 | ||
7c50328b | 575 | static struct file_operations splat_fops = { |
f1ca4da6 | 576 | .owner = THIS_MODULE, |
7c50328b | 577 | .open = splat_open, |
578 | .release = splat_release, | |
579 | .ioctl = splat_ioctl, | |
580 | .read = splat_read, | |
581 | .write = splat_write, | |
582 | .llseek = splat_seek, | |
f1ca4da6 | 583 | }; |
584 | ||
7c50328b | 585 | static struct cdev splat_cdev = { |
f1ca4da6 | 586 | .owner = THIS_MODULE, |
46c685d0 | 587 | .kobj = { .name = SPLAT_NAME, }, |
f1ca4da6 | 588 | }; |
589 | ||
590 | static int __init | |
7c50328b | 591 | splat_init(void) |
f1ca4da6 | 592 | { |
593 | dev_t dev; | |
f1b59d26 | 594 | int rc; |
f1ca4da6 | 595 | |
7c50328b | 596 | spin_lock_init(&splat_module_lock); |
597 | INIT_LIST_HEAD(&splat_module_list); | |
f1ca4da6 | 598 | |
7c50328b | 599 | SPLAT_SUBSYSTEM_INIT(kmem); |
600 | SPLAT_SUBSYSTEM_INIT(taskq); | |
601 | SPLAT_SUBSYSTEM_INIT(krng); | |
602 | SPLAT_SUBSYSTEM_INIT(mutex); | |
603 | SPLAT_SUBSYSTEM_INIT(condvar); | |
604 | SPLAT_SUBSYSTEM_INIT(thread); | |
605 | SPLAT_SUBSYSTEM_INIT(rwlock); | |
606 | SPLAT_SUBSYSTEM_INIT(time); | |
4b171585 | 607 | SPLAT_SUBSYSTEM_INIT(vnode); |
9490c148 | 608 | SPLAT_SUBSYSTEM_INIT(kobj); |
9f4c835a | 609 | SPLAT_SUBSYSTEM_INIT(atomic); |
d702c04f | 610 | SPLAT_SUBSYSTEM_INIT(list); |
b871b8cd | 611 | SPLAT_SUBSYSTEM_INIT(generic); |
f1ca4da6 | 612 | |
7c50328b | 613 | dev = MKDEV(SPLAT_MAJOR, 0); |
46c685d0 | 614 | if ((rc = register_chrdev_region(dev, SPLAT_MINORS, SPLAT_NAME))) |
f1ca4da6 | 615 | goto error; |
616 | ||
617 | /* Support for registering a character driver */ | |
7c50328b | 618 | cdev_init(&splat_cdev, &splat_fops); |
619 | if ((rc = cdev_add(&splat_cdev, dev, SPLAT_MINORS))) { | |
f6a19c0d | 620 | printk(KERN_ERR "SPLAT: Error adding cdev, %d\n", rc); |
7c50328b | 621 | kobject_put(&splat_cdev.kobj); |
622 | unregister_chrdev_region(dev, SPLAT_MINORS); | |
f1ca4da6 | 623 | goto error; |
624 | } | |
625 | ||
626 | /* Support for udev make driver info available in sysfs */ | |
46c685d0 | 627 | splat_class = spl_class_create(THIS_MODULE, "splat"); |
7c50328b | 628 | if (IS_ERR(splat_class)) { |
629 | rc = PTR_ERR(splat_class); | |
f6a19c0d | 630 | printk(KERN_ERR "SPLAT: Error creating splat class, %d\n", rc); |
7c50328b | 631 | cdev_del(&splat_cdev); |
632 | unregister_chrdev_region(dev, SPLAT_MINORS); | |
f1ca4da6 | 633 | goto error; |
634 | } | |
635 | ||
25557fd8 | 636 | splat_device = spl_device_create(splat_class, NULL, |
637 | MKDEV(SPLAT_MAJOR, 0), | |
638 | NULL, SPLAT_NAME); | |
f1ca4da6 | 639 | |
f6a19c0d | 640 | printk(KERN_INFO "SPLAT: Loaded Solaris Porting LAyer " |
0cbaeb11 | 641 | "Tests v%s\n", SPL_META_VERSION); |
f1ca4da6 | 642 | return 0; |
643 | error: | |
f6a19c0d | 644 | printk(KERN_ERR "SPLAT: Error registering splat device, %d\n", rc); |
f1ca4da6 | 645 | return rc; |
646 | } | |
647 | ||
648 | static void | |
7c50328b | 649 | splat_fini(void) |
f1ca4da6 | 650 | { |
7c50328b | 651 | dev_t dev = MKDEV(SPLAT_MAJOR, 0); |
f1ca4da6 | 652 | |
25557fd8 | 653 | spl_device_destroy(splat_class, splat_device, dev); |
46c685d0 | 654 | spl_class_destroy(splat_class); |
7c50328b | 655 | cdev_del(&splat_cdev); |
656 | unregister_chrdev_region(dev, SPLAT_MINORS); | |
657 | ||
b871b8cd | 658 | SPLAT_SUBSYSTEM_FINI(generic); |
d702c04f | 659 | SPLAT_SUBSYSTEM_FINI(list); |
9f4c835a | 660 | SPLAT_SUBSYSTEM_FINI(atomic); |
9490c148 | 661 | SPLAT_SUBSYSTEM_FINI(kobj); |
4b171585 | 662 | SPLAT_SUBSYSTEM_FINI(vnode); |
7c50328b | 663 | SPLAT_SUBSYSTEM_FINI(time); |
664 | SPLAT_SUBSYSTEM_FINI(rwlock); | |
665 | SPLAT_SUBSYSTEM_FINI(thread); | |
666 | SPLAT_SUBSYSTEM_FINI(condvar); | |
667 | SPLAT_SUBSYSTEM_FINI(mutex); | |
668 | SPLAT_SUBSYSTEM_FINI(krng); | |
669 | SPLAT_SUBSYSTEM_FINI(taskq); | |
670 | SPLAT_SUBSYSTEM_FINI(kmem); | |
671 | ||
672 | ASSERT(list_empty(&splat_module_list)); | |
f6a19c0d | 673 | printk(KERN_INFO "SPLAT: Unloaded Solaris Porting LAyer " |
0cbaeb11 | 674 | "Tests v%s\n", SPL_META_VERSION); |
f1ca4da6 | 675 | } |
676 | ||
7c50328b | 677 | module_init(splat_init); |
678 | module_exit(splat_fini); | |
f1ca4da6 | 679 | |
680 | MODULE_AUTHOR("Lawrence Livermore National Labs"); | |
715f6251 | 681 | MODULE_DESCRIPTION("Solaris Porting LAyer Tests"); |
f1ca4da6 | 682 | MODULE_LICENSE("GPL"); |