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716154c5 BB |
1 | /*****************************************************************************\ |
2 | * Copyright (C) 2007-2010 Lawrence Livermore National Security, LLC. | |
3 | * Copyright (C) 2007 The Regents of the University of California. | |
4 | * Produced at Lawrence Livermore National Laboratory (cf, DISCLAIMER). | |
5 | * Written by Brian Behlendorf <behlendorf1@llnl.gov>. | |
715f6251 | 6 | * UCRL-CODE-235197 |
7 | * | |
716154c5 | 8 | * This file is part of the SPL, Solaris Porting Layer. |
3d6af2dd | 9 | * For details, see <http://zfsonlinux.org/>. |
716154c5 BB |
10 | * |
11 | * The SPL is free software; you can redistribute it and/or modify it | |
12 | * under the terms of the GNU General Public License as published by the | |
13 | * Free Software Foundation; either version 2 of the License, or (at your | |
14 | * option) any later version. | |
715f6251 | 15 | * |
716154c5 | 16 | * The SPL is distributed in the hope that it will be useful, but WITHOUT |
715f6251 | 17 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
18 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
19 | * for more details. | |
20 | * | |
21 | * You should have received a copy of the GNU General Public License along | |
716154c5 BB |
22 | * with the SPL. If not, see <http://www.gnu.org/licenses/>. |
23 | ***************************************************************************** | |
24 | * Solaris Porting LAyer Tests (SPLAT) Test Control Interface. | |
25 | * | |
26 | * The 'splat' (Solaris Porting LAyer Tests) module is designed as a | |
27 | * framework which runs various in kernel regression tests to validate | |
28 | * the SPL primitives honor the Solaris ABI. | |
f1ca4da6 | 29 | * |
716154c5 BB |
30 | * The splat module is constructed of various splat_* source files each |
31 | * of which contain regression tests for a particular subsystem. For | |
32 | * example, the splat_kmem.c file contains all the tests for validating | |
33 | * the kmem interfaces have been implemented correctly. When the splat | |
34 | * module is loaded splat_*_init() will be called for each subsystems | |
35 | * tests. It is the responsibility of splat_*_init() to register all | |
36 | * the tests for this subsystem using the SPLAT_TEST_INIT() macro. | |
37 | * Similarly splat_*_fini() is called when the splat module is removed | |
38 | * and is responsible for unregistering its tests via the SPLAT_TEST_FINI | |
39 | * macro. Once a test is registered it can then be run with an ioctl() | |
40 | * call which specifies the subsystem and test to be run. The provided | |
41 | * splat command line tool can be used to display all available | |
42 | * subsystems and tests. It can also be used to run the full suite | |
43 | * of regression tests or particular tests. | |
44 | \*****************************************************************************/ | |
f1ca4da6 | 45 | |
df870a69 BB |
46 | #include <linux/module.h> |
47 | #include <linux/slab.h> | |
48 | #include <linux/vmalloc.h> | |
49 | #include <linux/cdev.h> | |
50 | #include <linux/fs.h> | |
51 | #include <linux/uaccess.h> | |
52 | #include <sys/types.h> | |
53 | #include <sys/debug.h> | |
7c50328b | 54 | #include "splat-internal.h" |
f1ca4da6 | 55 | |
46c685d0 | 56 | static spl_class *splat_class; |
25557fd8 | 57 | static spl_device *splat_device; |
7c50328b | 58 | static struct list_head splat_module_list; |
59 | static spinlock_t splat_module_lock; | |
f1ca4da6 | 60 | |
61 | static int | |
7c50328b | 62 | splat_open(struct inode *inode, struct file *file) |
f1ca4da6 | 63 | { |
64 | unsigned int minor = iminor(inode); | |
7c50328b | 65 | splat_info_t *info; |
f1ca4da6 | 66 | |
7c50328b | 67 | if (minor >= SPLAT_MINORS) |
f1ca4da6 | 68 | return -ENXIO; |
69 | ||
7c50328b | 70 | info = (splat_info_t *)kmalloc(sizeof(*info), GFP_KERNEL); |
f1ca4da6 | 71 | if (info == NULL) |
72 | return -ENOMEM; | |
73 | ||
0e149d42 | 74 | mutex_init(&info->info_lock); |
7c50328b | 75 | info->info_size = SPLAT_INFO_BUFFER_SIZE; |
76 | info->info_buffer = (char *)vmalloc(SPLAT_INFO_BUFFER_SIZE); | |
f1ca4da6 | 77 | if (info->info_buffer == NULL) { |
78 | kfree(info); | |
79 | return -ENOMEM; | |
80 | } | |
1a73940d | 81 | memset(info->info_buffer, 0, info->info_size); |
f1ca4da6 | 82 | |
83 | info->info_head = info->info_buffer; | |
84 | file->private_data = (void *)info; | |
85 | ||
1a73940d NB |
86 | splat_print(file, "%s\n", spl_version); |
87 | ||
88 | return 0; | |
f1ca4da6 | 89 | } |
90 | ||
91 | static int | |
7c50328b | 92 | splat_release(struct inode *inode, struct file *file) |
f1ca4da6 | 93 | { |
94 | unsigned int minor = iminor(inode); | |
7c50328b | 95 | splat_info_t *info = (splat_info_t *)file->private_data; |
f1ca4da6 | 96 | |
7c50328b | 97 | if (minor >= SPLAT_MINORS) |
f1ca4da6 | 98 | return -ENXIO; |
99 | ||
100 | ASSERT(info); | |
101 | ASSERT(info->info_buffer); | |
102 | ||
0e149d42 | 103 | mutex_destroy(&info->info_lock); |
f1ca4da6 | 104 | vfree(info->info_buffer); |
105 | kfree(info); | |
106 | ||
107 | return 0; | |
108 | } | |
109 | ||
110 | static int | |
7c50328b | 111 | splat_buffer_clear(struct file *file, splat_cfg_t *kcfg, unsigned long arg) |
f1ca4da6 | 112 | { |
7c50328b | 113 | splat_info_t *info = (splat_info_t *)file->private_data; |
f1ca4da6 | 114 | |
115 | ASSERT(info); | |
116 | ASSERT(info->info_buffer); | |
117 | ||
0e149d42 | 118 | mutex_lock(&info->info_lock); |
f1ca4da6 | 119 | memset(info->info_buffer, 0, info->info_size); |
120 | info->info_head = info->info_buffer; | |
0e149d42 | 121 | mutex_unlock(&info->info_lock); |
f1ca4da6 | 122 | |
123 | return 0; | |
124 | } | |
125 | ||
126 | static int | |
7c50328b | 127 | splat_buffer_size(struct file *file, splat_cfg_t *kcfg, unsigned long arg) |
f1ca4da6 | 128 | { |
7c50328b | 129 | splat_info_t *info = (splat_info_t *)file->private_data; |
f1ca4da6 | 130 | char *buf; |
131 | int min, size, rc = 0; | |
132 | ||
133 | ASSERT(info); | |
134 | ASSERT(info->info_buffer); | |
135 | ||
0e149d42 | 136 | mutex_lock(&info->info_lock); |
f1ca4da6 | 137 | if (kcfg->cfg_arg1 > 0) { |
138 | ||
139 | size = kcfg->cfg_arg1; | |
140 | buf = (char *)vmalloc(size); | |
141 | if (buf == NULL) { | |
142 | rc = -ENOMEM; | |
143 | goto out; | |
144 | } | |
145 | ||
146 | /* Zero fill and truncate contents when coping buffer */ | |
147 | min = ((size < info->info_size) ? size : info->info_size); | |
148 | memset(buf, 0, size); | |
149 | memcpy(buf, info->info_buffer, min); | |
150 | vfree(info->info_buffer); | |
151 | info->info_size = size; | |
152 | info->info_buffer = buf; | |
153 | info->info_head = info->info_buffer; | |
154 | } | |
155 | ||
156 | kcfg->cfg_rc1 = info->info_size; | |
157 | ||
7c50328b | 158 | if (copy_to_user((struct splat_cfg_t __user *)arg, kcfg, sizeof(*kcfg))) |
f1ca4da6 | 159 | rc = -EFAULT; |
160 | out: | |
0e149d42 | 161 | mutex_unlock(&info->info_lock); |
f1ca4da6 | 162 | |
163 | return rc; | |
164 | } | |
165 | ||
166 | ||
7c50328b | 167 | static splat_subsystem_t * |
168 | splat_subsystem_find(int id) { | |
169 | splat_subsystem_t *sub; | |
f1ca4da6 | 170 | |
7c50328b | 171 | spin_lock(&splat_module_lock); |
172 | list_for_each_entry(sub, &splat_module_list, subsystem_list) { | |
f1ca4da6 | 173 | if (id == sub->desc.id) { |
7c50328b | 174 | spin_unlock(&splat_module_lock); |
f1ca4da6 | 175 | return sub; |
176 | } | |
177 | } | |
7c50328b | 178 | spin_unlock(&splat_module_lock); |
f1ca4da6 | 179 | |
180 | return NULL; | |
181 | } | |
182 | ||
183 | static int | |
7c50328b | 184 | splat_subsystem_count(splat_cfg_t *kcfg, unsigned long arg) |
f1ca4da6 | 185 | { |
7c50328b | 186 | splat_subsystem_t *sub; |
f1ca4da6 | 187 | int i = 0; |
188 | ||
7c50328b | 189 | spin_lock(&splat_module_lock); |
190 | list_for_each_entry(sub, &splat_module_list, subsystem_list) | |
f1ca4da6 | 191 | i++; |
192 | ||
7c50328b | 193 | spin_unlock(&splat_module_lock); |
f1ca4da6 | 194 | kcfg->cfg_rc1 = i; |
195 | ||
7c50328b | 196 | if (copy_to_user((struct splat_cfg_t __user *)arg, kcfg, sizeof(*kcfg))) |
f1ca4da6 | 197 | return -EFAULT; |
198 | ||
199 | return 0; | |
200 | } | |
201 | ||
202 | static int | |
7c50328b | 203 | splat_subsystem_list(splat_cfg_t *kcfg, unsigned long arg) |
f1ca4da6 | 204 | { |
7c50328b | 205 | splat_subsystem_t *sub; |
206 | splat_cfg_t *tmp; | |
f1ca4da6 | 207 | int size, i = 0; |
208 | ||
209 | /* Structure will be sized large enough for N subsystem entries | |
210 | * which is passed in by the caller. On exit the number of | |
211 | * entries filled in with valid subsystems will be stored in | |
212 | * cfg_rc1. If the caller does not provide enough entries | |
213 | * for all subsystems we will truncate the list to avoid overrun. | |
214 | */ | |
7c50328b | 215 | size = sizeof(*tmp) + kcfg->cfg_data.splat_subsystems.size * |
216 | sizeof(splat_user_t); | |
f1ca4da6 | 217 | tmp = kmalloc(size, GFP_KERNEL); |
218 | if (tmp == NULL) | |
219 | return -ENOMEM; | |
220 | ||
221 | /* Local 'tmp' is used as the structure copied back to user space */ | |
222 | memset(tmp, 0, size); | |
223 | memcpy(tmp, kcfg, sizeof(*kcfg)); | |
224 | ||
7c50328b | 225 | spin_lock(&splat_module_lock); |
226 | list_for_each_entry(sub, &splat_module_list, subsystem_list) { | |
227 | strncpy(tmp->cfg_data.splat_subsystems.descs[i].name, | |
228 | sub->desc.name, SPLAT_NAME_SIZE); | |
229 | strncpy(tmp->cfg_data.splat_subsystems.descs[i].desc, | |
230 | sub->desc.desc, SPLAT_DESC_SIZE); | |
231 | tmp->cfg_data.splat_subsystems.descs[i].id = sub->desc.id; | |
f1ca4da6 | 232 | |
233 | /* Truncate list if we are about to overrun alloc'ed memory */ | |
7c50328b | 234 | if ((i++) == kcfg->cfg_data.splat_subsystems.size) |
f1ca4da6 | 235 | break; |
236 | } | |
7c50328b | 237 | spin_unlock(&splat_module_lock); |
f1ca4da6 | 238 | tmp->cfg_rc1 = i; |
239 | ||
7c50328b | 240 | if (copy_to_user((struct splat_cfg_t __user *)arg, tmp, size)) { |
f1ca4da6 | 241 | kfree(tmp); |
242 | return -EFAULT; | |
243 | } | |
244 | ||
245 | kfree(tmp); | |
246 | return 0; | |
247 | } | |
248 | ||
249 | static int | |
7c50328b | 250 | splat_test_count(splat_cfg_t *kcfg, unsigned long arg) |
f1ca4da6 | 251 | { |
7c50328b | 252 | splat_subsystem_t *sub; |
253 | splat_test_t *test; | |
f1b59d26 | 254 | int i = 0; |
f1ca4da6 | 255 | |
256 | /* Subsystem ID passed as arg1 */ | |
7c50328b | 257 | sub = splat_subsystem_find(kcfg->cfg_arg1); |
f1ca4da6 | 258 | if (sub == NULL) |
259 | return -EINVAL; | |
260 | ||
261 | spin_lock(&(sub->test_lock)); | |
262 | list_for_each_entry(test, &(sub->test_list), test_list) | |
263 | i++; | |
264 | ||
265 | spin_unlock(&(sub->test_lock)); | |
266 | kcfg->cfg_rc1 = i; | |
267 | ||
7c50328b | 268 | if (copy_to_user((struct splat_cfg_t __user *)arg, kcfg, sizeof(*kcfg))) |
f1ca4da6 | 269 | return -EFAULT; |
270 | ||
271 | return 0; | |
272 | } | |
273 | ||
274 | static int | |
7c50328b | 275 | splat_test_list(splat_cfg_t *kcfg, unsigned long arg) |
f1ca4da6 | 276 | { |
7c50328b | 277 | splat_subsystem_t *sub; |
278 | splat_test_t *test; | |
279 | splat_cfg_t *tmp; | |
f1b59d26 | 280 | int size, i = 0; |
f1ca4da6 | 281 | |
282 | /* Subsystem ID passed as arg1 */ | |
7c50328b | 283 | sub = splat_subsystem_find(kcfg->cfg_arg1); |
f1ca4da6 | 284 | if (sub == NULL) |
285 | return -EINVAL; | |
286 | ||
287 | /* Structure will be sized large enough for N test entries | |
288 | * which is passed in by the caller. On exit the number of | |
289 | * entries filled in with valid tests will be stored in | |
290 | * cfg_rc1. If the caller does not provide enough entries | |
291 | * for all tests we will truncate the list to avoid overrun. | |
292 | */ | |
7c50328b | 293 | size = sizeof(*tmp)+kcfg->cfg_data.splat_tests.size*sizeof(splat_user_t); |
f1ca4da6 | 294 | tmp = kmalloc(size, GFP_KERNEL); |
295 | if (tmp == NULL) | |
296 | return -ENOMEM; | |
297 | ||
298 | /* Local 'tmp' is used as the structure copied back to user space */ | |
299 | memset(tmp, 0, size); | |
300 | memcpy(tmp, kcfg, sizeof(*kcfg)); | |
301 | ||
302 | spin_lock(&(sub->test_lock)); | |
303 | list_for_each_entry(test, &(sub->test_list), test_list) { | |
7c50328b | 304 | strncpy(tmp->cfg_data.splat_tests.descs[i].name, |
305 | test->desc.name, SPLAT_NAME_SIZE); | |
306 | strncpy(tmp->cfg_data.splat_tests.descs[i].desc, | |
307 | test->desc.desc, SPLAT_DESC_SIZE); | |
308 | tmp->cfg_data.splat_tests.descs[i].id = test->desc.id; | |
f1ca4da6 | 309 | |
310 | /* Truncate list if we are about to overrun alloc'ed memory */ | |
7c50328b | 311 | if ((i++) == kcfg->cfg_data.splat_tests.size) |
f1ca4da6 | 312 | break; |
313 | } | |
314 | spin_unlock(&(sub->test_lock)); | |
315 | tmp->cfg_rc1 = i; | |
316 | ||
7c50328b | 317 | if (copy_to_user((struct splat_cfg_t __user *)arg, tmp, size)) { |
f1ca4da6 | 318 | kfree(tmp); |
319 | return -EFAULT; | |
320 | } | |
321 | ||
322 | kfree(tmp); | |
323 | return 0; | |
324 | } | |
325 | ||
326 | static int | |
7c50328b | 327 | splat_validate(struct file *file, splat_subsystem_t *sub, int cmd, void *arg) |
f1ca4da6 | 328 | { |
7c50328b | 329 | splat_test_t *test; |
f1ca4da6 | 330 | |
331 | spin_lock(&(sub->test_lock)); | |
332 | list_for_each_entry(test, &(sub->test_list), test_list) { | |
333 | if (test->desc.id == cmd) { | |
334 | spin_unlock(&(sub->test_lock)); | |
335 | return test->test(file, arg); | |
336 | } | |
337 | } | |
338 | spin_unlock(&(sub->test_lock)); | |
339 | ||
340 | return -EINVAL; | |
341 | } | |
342 | ||
343 | static int | |
e554dffa | 344 | splat_ioctl_cfg(struct file *file, unsigned int cmd, unsigned long arg) |
f1ca4da6 | 345 | { |
7c50328b | 346 | splat_cfg_t kcfg; |
f1ca4da6 | 347 | int rc = 0; |
348 | ||
e554dffa BB |
349 | /* User and kernel space agree about arg size */ |
350 | if (_IOC_SIZE(cmd) != sizeof(kcfg)) | |
351 | return -EBADMSG; | |
352 | ||
7c50328b | 353 | if (copy_from_user(&kcfg, (splat_cfg_t *)arg, sizeof(kcfg))) |
f1ca4da6 | 354 | return -EFAULT; |
355 | ||
7c50328b | 356 | if (kcfg.cfg_magic != SPLAT_CFG_MAGIC) { |
357 | splat_print(file, "Bad config magic 0x%x != 0x%x\n", | |
358 | kcfg.cfg_magic, SPLAT_CFG_MAGIC); | |
f1ca4da6 | 359 | return -EINVAL; |
360 | } | |
361 | ||
362 | switch (kcfg.cfg_cmd) { | |
7c50328b | 363 | case SPLAT_CFG_BUFFER_CLEAR: |
f1ca4da6 | 364 | /* cfg_arg1 - Unused |
365 | * cfg_rc1 - Unused | |
366 | */ | |
7c50328b | 367 | rc = splat_buffer_clear(file, &kcfg, arg); |
f1ca4da6 | 368 | break; |
7c50328b | 369 | case SPLAT_CFG_BUFFER_SIZE: |
f1ca4da6 | 370 | /* cfg_arg1 - 0 - query size; >0 resize |
371 | * cfg_rc1 - Set to current buffer size | |
372 | */ | |
7c50328b | 373 | rc = splat_buffer_size(file, &kcfg, arg); |
f1ca4da6 | 374 | break; |
7c50328b | 375 | case SPLAT_CFG_SUBSYSTEM_COUNT: |
f1ca4da6 | 376 | /* cfg_arg1 - Unused |
377 | * cfg_rc1 - Set to number of subsystems | |
378 | */ | |
7c50328b | 379 | rc = splat_subsystem_count(&kcfg, arg); |
f1ca4da6 | 380 | break; |
7c50328b | 381 | case SPLAT_CFG_SUBSYSTEM_LIST: |
f1ca4da6 | 382 | /* cfg_arg1 - Unused |
383 | * cfg_rc1 - Set to number of subsystems | |
e554dffa | 384 | * cfg_data.splat_subsystems - Set with subsystems |
f1ca4da6 | 385 | */ |
7c50328b | 386 | rc = splat_subsystem_list(&kcfg, arg); |
f1ca4da6 | 387 | break; |
7c50328b | 388 | case SPLAT_CFG_TEST_COUNT: |
f1ca4da6 | 389 | /* cfg_arg1 - Set to a target subsystem |
390 | * cfg_rc1 - Set to number of tests | |
391 | */ | |
7c50328b | 392 | rc = splat_test_count(&kcfg, arg); |
f1ca4da6 | 393 | break; |
7c50328b | 394 | case SPLAT_CFG_TEST_LIST: |
f1ca4da6 | 395 | /* cfg_arg1 - Set to a target subsystem |
396 | * cfg_rc1 - Set to number of tests | |
7c50328b | 397 | * cfg_data.splat_subsystems - Populated with tests |
f1ca4da6 | 398 | */ |
7c50328b | 399 | rc = splat_test_list(&kcfg, arg); |
f1ca4da6 | 400 | break; |
401 | default: | |
e554dffa BB |
402 | splat_print(file, "Bad config command %d\n", |
403 | kcfg.cfg_cmd); | |
f1ca4da6 | 404 | rc = -EINVAL; |
405 | break; | |
406 | } | |
407 | ||
408 | return rc; | |
409 | } | |
410 | ||
411 | static int | |
e554dffa | 412 | splat_ioctl_cmd(struct file *file, unsigned int cmd, unsigned long arg) |
f1ca4da6 | 413 | { |
7c50328b | 414 | splat_subsystem_t *sub; |
415 | splat_cmd_t kcmd; | |
f1ca4da6 | 416 | int rc = -EINVAL; |
417 | void *data = NULL; | |
418 | ||
e554dffa BB |
419 | /* User and kernel space agree about arg size */ |
420 | if (_IOC_SIZE(cmd) != sizeof(kcmd)) | |
421 | return -EBADMSG; | |
422 | ||
7c50328b | 423 | if (copy_from_user(&kcmd, (splat_cfg_t *)arg, sizeof(kcmd))) |
f1ca4da6 | 424 | return -EFAULT; |
425 | ||
7c50328b | 426 | if (kcmd.cmd_magic != SPLAT_CMD_MAGIC) { |
427 | splat_print(file, "Bad command magic 0x%x != 0x%x\n", | |
428 | kcmd.cmd_magic, SPLAT_CFG_MAGIC); | |
f1ca4da6 | 429 | return -EINVAL; |
430 | } | |
431 | ||
432 | /* Allocate memory for any opaque data the caller needed to pass on */ | |
433 | if (kcmd.cmd_data_size > 0) { | |
434 | data = (void *)kmalloc(kcmd.cmd_data_size, GFP_KERNEL); | |
435 | if (data == NULL) | |
436 | return -ENOMEM; | |
437 | ||
7c50328b | 438 | if (copy_from_user(data, (void *)(arg + offsetof(splat_cmd_t, |
f1ca4da6 | 439 | cmd_data_str)), kcmd.cmd_data_size)) { |
440 | kfree(data); | |
441 | return -EFAULT; | |
442 | } | |
443 | } | |
444 | ||
7c50328b | 445 | sub = splat_subsystem_find(kcmd.cmd_subsystem); |
f1ca4da6 | 446 | if (sub != NULL) |
7c50328b | 447 | rc = splat_validate(file, sub, kcmd.cmd_test, data); |
f1ca4da6 | 448 | else |
449 | rc = -EINVAL; | |
450 | ||
451 | if (data != NULL) | |
452 | kfree(data); | |
453 | ||
454 | return rc; | |
455 | } | |
456 | ||
8655ce49 BB |
457 | static long |
458 | splat_unlocked_ioctl(struct file *file, unsigned int cmd, unsigned long arg) | |
f1ca4da6 | 459 | { |
f1b59d26 | 460 | unsigned int minor = iminor(file->f_dentry->d_inode); |
461 | int rc = 0; | |
f1ca4da6 | 462 | |
463 | /* Ignore tty ioctls */ | |
464 | if ((cmd & 0xffffff00) == ((int)'T') << 8) | |
465 | return -ENOTTY; | |
466 | ||
7c50328b | 467 | if (minor >= SPLAT_MINORS) |
f1ca4da6 | 468 | return -ENXIO; |
469 | ||
470 | switch (cmd) { | |
7c50328b | 471 | case SPLAT_CFG: |
e554dffa | 472 | rc = splat_ioctl_cfg(file, cmd, arg); |
f1ca4da6 | 473 | break; |
7c50328b | 474 | case SPLAT_CMD: |
e554dffa | 475 | rc = splat_ioctl_cmd(file, cmd, arg); |
f1ca4da6 | 476 | break; |
477 | default: | |
7c50328b | 478 | splat_print(file, "Bad ioctl command %d\n", cmd); |
f1ca4da6 | 479 | rc = -EINVAL; |
480 | break; | |
481 | } | |
482 | ||
483 | return rc; | |
484 | } | |
485 | ||
9593ef76 BB |
486 | #ifdef CONFIG_COMPAT |
487 | /* Compatibility handler for ioctls from 32-bit ELF binaries */ | |
488 | static long | |
489 | splat_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg) | |
490 | { | |
8655ce49 | 491 | return splat_unlocked_ioctl(file, cmd, arg); |
9593ef76 BB |
492 | } |
493 | #endif /* CONFIG_COMPAT */ | |
494 | ||
f1ca4da6 | 495 | /* I'm not sure why you would want to write in to this buffer from |
496 | * user space since its principle use is to pass test status info | |
497 | * back to the user space, but I don't see any reason to prevent it. | |
498 | */ | |
7c50328b | 499 | static ssize_t splat_write(struct file *file, const char __user *buf, |
f1ca4da6 | 500 | size_t count, loff_t *ppos) |
501 | { | |
502 | unsigned int minor = iminor(file->f_dentry->d_inode); | |
7c50328b | 503 | splat_info_t *info = (splat_info_t *)file->private_data; |
f1ca4da6 | 504 | int rc = 0; |
505 | ||
7c50328b | 506 | if (minor >= SPLAT_MINORS) |
f1ca4da6 | 507 | return -ENXIO; |
508 | ||
509 | ASSERT(info); | |
510 | ASSERT(info->info_buffer); | |
511 | ||
0e149d42 | 512 | mutex_lock(&info->info_lock); |
f1ca4da6 | 513 | |
514 | /* Write beyond EOF */ | |
515 | if (*ppos >= info->info_size) { | |
516 | rc = -EFBIG; | |
517 | goto out; | |
518 | } | |
519 | ||
520 | /* Resize count if beyond EOF */ | |
521 | if (*ppos + count > info->info_size) | |
522 | count = info->info_size - *ppos; | |
523 | ||
524 | if (copy_from_user(info->info_buffer, buf, count)) { | |
525 | rc = -EFAULT; | |
526 | goto out; | |
527 | } | |
528 | ||
529 | *ppos += count; | |
530 | rc = count; | |
531 | out: | |
0e149d42 | 532 | mutex_unlock(&info->info_lock); |
f1ca4da6 | 533 | return rc; |
534 | } | |
535 | ||
7c50328b | 536 | static ssize_t splat_read(struct file *file, char __user *buf, |
f1ca4da6 | 537 | size_t count, loff_t *ppos) |
538 | { | |
539 | unsigned int minor = iminor(file->f_dentry->d_inode); | |
7c50328b | 540 | splat_info_t *info = (splat_info_t *)file->private_data; |
f1ca4da6 | 541 | int rc = 0; |
542 | ||
7c50328b | 543 | if (minor >= SPLAT_MINORS) |
f1ca4da6 | 544 | return -ENXIO; |
545 | ||
546 | ASSERT(info); | |
547 | ASSERT(info->info_buffer); | |
548 | ||
0e149d42 | 549 | mutex_lock(&info->info_lock); |
f1ca4da6 | 550 | |
551 | /* Read beyond EOF */ | |
552 | if (*ppos >= info->info_size) | |
553 | goto out; | |
554 | ||
555 | /* Resize count if beyond EOF */ | |
556 | if (*ppos + count > info->info_size) | |
557 | count = info->info_size - *ppos; | |
558 | ||
559 | if (copy_to_user(buf, info->info_buffer + *ppos, count)) { | |
560 | rc = -EFAULT; | |
561 | goto out; | |
562 | } | |
563 | ||
564 | *ppos += count; | |
565 | rc = count; | |
566 | out: | |
0e149d42 | 567 | mutex_unlock(&info->info_lock); |
f1ca4da6 | 568 | return rc; |
569 | } | |
570 | ||
7c50328b | 571 | static loff_t splat_seek(struct file *file, loff_t offset, int origin) |
f1ca4da6 | 572 | { |
573 | unsigned int minor = iminor(file->f_dentry->d_inode); | |
7c50328b | 574 | splat_info_t *info = (splat_info_t *)file->private_data; |
f1ca4da6 | 575 | int rc = -EINVAL; |
576 | ||
7c50328b | 577 | if (minor >= SPLAT_MINORS) |
f1ca4da6 | 578 | return -ENXIO; |
579 | ||
580 | ASSERT(info); | |
581 | ASSERT(info->info_buffer); | |
582 | ||
0e149d42 | 583 | mutex_lock(&info->info_lock); |
f1ca4da6 | 584 | |
585 | switch (origin) { | |
586 | case 0: /* SEEK_SET - No-op just do it */ | |
587 | break; | |
588 | case 1: /* SEEK_CUR - Seek from current */ | |
589 | offset = file->f_pos + offset; | |
590 | break; | |
591 | case 2: /* SEEK_END - Seek from end */ | |
592 | offset = info->info_size + offset; | |
593 | break; | |
594 | } | |
595 | ||
596 | if (offset >= 0) { | |
597 | file->f_pos = offset; | |
598 | file->f_version = 0; | |
599 | rc = offset; | |
600 | } | |
601 | ||
0e149d42 | 602 | mutex_unlock(&info->info_lock); |
f1ca4da6 | 603 | |
604 | return rc; | |
605 | } | |
606 | ||
39ab5440 | 607 | static struct cdev splat_cdev; |
7c50328b | 608 | static struct file_operations splat_fops = { |
9593ef76 BB |
609 | .owner = THIS_MODULE, |
610 | .open = splat_open, | |
611 | .release = splat_release, | |
8655ce49 | 612 | .unlocked_ioctl = splat_unlocked_ioctl, |
9593ef76 BB |
613 | #ifdef CONFIG_COMPAT |
614 | .compat_ioctl = splat_compat_ioctl, | |
615 | #endif | |
616 | .read = splat_read, | |
617 | .write = splat_write, | |
618 | .llseek = splat_seek, | |
f1ca4da6 | 619 | }; |
620 | ||
51a727e9 | 621 | static int |
7c50328b | 622 | splat_init(void) |
f1ca4da6 | 623 | { |
624 | dev_t dev; | |
f1b59d26 | 625 | int rc; |
f1ca4da6 | 626 | |
7c50328b | 627 | spin_lock_init(&splat_module_lock); |
628 | INIT_LIST_HEAD(&splat_module_list); | |
f1ca4da6 | 629 | |
7c50328b | 630 | SPLAT_SUBSYSTEM_INIT(kmem); |
631 | SPLAT_SUBSYSTEM_INIT(taskq); | |
632 | SPLAT_SUBSYSTEM_INIT(krng); | |
633 | SPLAT_SUBSYSTEM_INIT(mutex); | |
634 | SPLAT_SUBSYSTEM_INIT(condvar); | |
635 | SPLAT_SUBSYSTEM_INIT(thread); | |
636 | SPLAT_SUBSYSTEM_INIT(rwlock); | |
637 | SPLAT_SUBSYSTEM_INIT(time); | |
4b171585 | 638 | SPLAT_SUBSYSTEM_INIT(vnode); |
9490c148 | 639 | SPLAT_SUBSYSTEM_INIT(kobj); |
9f4c835a | 640 | SPLAT_SUBSYSTEM_INIT(atomic); |
d702c04f | 641 | SPLAT_SUBSYSTEM_INIT(list); |
b871b8cd | 642 | SPLAT_SUBSYSTEM_INIT(generic); |
ec7d53e9 | 643 | SPLAT_SUBSYSTEM_INIT(cred); |
19c1eb82 | 644 | SPLAT_SUBSYSTEM_INIT(zlib); |
bf0c60c0 | 645 | SPLAT_SUBSYSTEM_INIT(linux); |
f1ca4da6 | 646 | |
7c50328b | 647 | dev = MKDEV(SPLAT_MAJOR, 0); |
46c685d0 | 648 | if ((rc = register_chrdev_region(dev, SPLAT_MINORS, SPLAT_NAME))) |
f1ca4da6 | 649 | goto error; |
650 | ||
651 | /* Support for registering a character driver */ | |
7c50328b | 652 | cdev_init(&splat_cdev, &splat_fops); |
39ab5440 BB |
653 | splat_cdev.owner = THIS_MODULE; |
654 | kobject_set_name(&splat_cdev.kobj, SPLAT_NAME); | |
7c50328b | 655 | if ((rc = cdev_add(&splat_cdev, dev, SPLAT_MINORS))) { |
f6a19c0d | 656 | printk(KERN_ERR "SPLAT: Error adding cdev, %d\n", rc); |
7c50328b | 657 | kobject_put(&splat_cdev.kobj); |
658 | unregister_chrdev_region(dev, SPLAT_MINORS); | |
f1ca4da6 | 659 | goto error; |
660 | } | |
661 | ||
662 | /* Support for udev make driver info available in sysfs */ | |
46c685d0 | 663 | splat_class = spl_class_create(THIS_MODULE, "splat"); |
7c50328b | 664 | if (IS_ERR(splat_class)) { |
665 | rc = PTR_ERR(splat_class); | |
f6a19c0d | 666 | printk(KERN_ERR "SPLAT: Error creating splat class, %d\n", rc); |
7c50328b | 667 | cdev_del(&splat_cdev); |
668 | unregister_chrdev_region(dev, SPLAT_MINORS); | |
f1ca4da6 | 669 | goto error; |
670 | } | |
671 | ||
25557fd8 | 672 | splat_device = spl_device_create(splat_class, NULL, |
673 | MKDEV(SPLAT_MAJOR, 0), | |
674 | NULL, SPLAT_NAME); | |
f1ca4da6 | 675 | |
0835057e BB |
676 | printk(KERN_INFO "SPLAT: Loaded module v%s-%s%s\n", |
677 | SPL_META_VERSION, SPL_META_RELEASE, SPL_DEBUG_STR); | |
f1ca4da6 | 678 | return 0; |
679 | error: | |
f6a19c0d | 680 | printk(KERN_ERR "SPLAT: Error registering splat device, %d\n", rc); |
f1ca4da6 | 681 | return rc; |
682 | } | |
683 | ||
51a727e9 | 684 | static int |
7c50328b | 685 | splat_fini(void) |
f1ca4da6 | 686 | { |
7c50328b | 687 | dev_t dev = MKDEV(SPLAT_MAJOR, 0); |
f1ca4da6 | 688 | |
25557fd8 | 689 | spl_device_destroy(splat_class, splat_device, dev); |
46c685d0 | 690 | spl_class_destroy(splat_class); |
7c50328b | 691 | cdev_del(&splat_cdev); |
692 | unregister_chrdev_region(dev, SPLAT_MINORS); | |
693 | ||
bf0c60c0 | 694 | SPLAT_SUBSYSTEM_FINI(linux); |
19c1eb82 | 695 | SPLAT_SUBSYSTEM_FINI(zlib); |
ec7d53e9 | 696 | SPLAT_SUBSYSTEM_FINI(cred); |
b871b8cd | 697 | SPLAT_SUBSYSTEM_FINI(generic); |
d702c04f | 698 | SPLAT_SUBSYSTEM_FINI(list); |
9f4c835a | 699 | SPLAT_SUBSYSTEM_FINI(atomic); |
9490c148 | 700 | SPLAT_SUBSYSTEM_FINI(kobj); |
4b171585 | 701 | SPLAT_SUBSYSTEM_FINI(vnode); |
7c50328b | 702 | SPLAT_SUBSYSTEM_FINI(time); |
703 | SPLAT_SUBSYSTEM_FINI(rwlock); | |
704 | SPLAT_SUBSYSTEM_FINI(thread); | |
705 | SPLAT_SUBSYSTEM_FINI(condvar); | |
706 | SPLAT_SUBSYSTEM_FINI(mutex); | |
707 | SPLAT_SUBSYSTEM_FINI(krng); | |
708 | SPLAT_SUBSYSTEM_FINI(taskq); | |
709 | SPLAT_SUBSYSTEM_FINI(kmem); | |
710 | ||
711 | ASSERT(list_empty(&splat_module_list)); | |
0835057e BB |
712 | printk(KERN_INFO "SPLAT: Unloaded module v%s-%s%s\n", |
713 | SPL_META_VERSION, SPL_META_RELEASE, SPL_DEBUG_STR); | |
51a727e9 BB |
714 | |
715 | return 0; | |
f1ca4da6 | 716 | } |
717 | ||
51a727e9 BB |
718 | spl_module_init(splat_init); |
719 | spl_module_exit(splat_fini); | |
f1ca4da6 | 720 | |
721 | MODULE_AUTHOR("Lawrence Livermore National Labs"); | |
715f6251 | 722 | MODULE_DESCRIPTION("Solaris Porting LAyer Tests"); |
f1ca4da6 | 723 | MODULE_LICENSE("GPL"); |
33a20369 | 724 | MODULE_VERSION(SPL_META_VERSION "-" SPL_META_RELEASE); |