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d7e09d03 PT |
1 | /* |
2 | * GPL HEADER START | |
3 | * | |
4 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. | |
5 | * | |
6 | * This program is free software; you can redistribute it and/or modify | |
7 | * it under the terms of the GNU General Public License version 2 only, | |
8 | * as published by the Free Software Foundation. | |
9 | * | |
10 | * This program is distributed in the hope that it will be useful, but | |
11 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
13 | * General Public License version 2 for more details (a copy is included | |
14 | * in the LICENSE file that accompanied this code). | |
15 | * | |
16 | * You should have received a copy of the GNU General Public License | |
17 | * version 2 along with this program; If not, see | |
18 | * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf | |
19 | * | |
20 | * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, | |
21 | * CA 95054 USA or visit www.sun.com if you need additional information or | |
22 | * have any questions. | |
23 | * | |
24 | * GPL HEADER END | |
25 | */ | |
26 | /* | |
27 | * Copyright (c) 2008, 2010, Oracle and/or its affiliates. All rights reserved. | |
28 | * Use is subject to license terms. | |
29 | * | |
30 | * Copyright (c) 2012, Intel Corporation. | |
31 | */ | |
32 | /* | |
33 | * This file is part of Lustre, http://www.lustre.org/ | |
34 | * Lustre is a trademark of Sun Microsystems, Inc. | |
35 | */ | |
87643abf MT |
36 | #include <linux/module.h> |
37 | #include <linux/kernel.h> | |
38 | #include <linux/mm.h> | |
39 | #include <linux/string.h> | |
40 | #include <linux/stat.h> | |
41 | #include <linux/errno.h> | |
42 | #include <linux/unistd.h> | |
43 | #include <net/sock.h> | |
44 | #include <linux/uio.h> | |
d7e09d03 | 45 | |
87643abf MT |
46 | #include <linux/uaccess.h> |
47 | ||
48 | #include <linux/fs.h> | |
49 | #include <linux/file.h> | |
50 | #include <linux/list.h> | |
51 | ||
87643abf | 52 | #include <linux/sysctl.h> |
0871d551 | 53 | #include <linux/debugfs.h> |
87643abf MT |
54 | |
55 | # define DEBUG_SUBSYSTEM S_LNET | |
d7e09d03 | 56 | |
9fdaf8c0 | 57 | #include "../../include/linux/libcfs/libcfs.h" |
87643abf MT |
58 | #include <asm/div64.h> |
59 | ||
9fdaf8c0 GKH |
60 | #include "../../include/linux/libcfs/libcfs_crypto.h" |
61 | #include "../../include/linux/lnet/lib-lnet.h" | |
62 | #include "../../include/linux/lnet/lnet.h" | |
d7e09d03 PT |
63 | #include "tracefile.h" |
64 | ||
a0455471 | 65 | MODULE_AUTHOR("OpenSFS, Inc. <http://www.lustre.org/>"); |
87643abf MT |
66 | MODULE_DESCRIPTION("Portals v3.1"); |
67 | MODULE_LICENSE("GPL"); | |
68 | ||
0871d551 | 69 | static struct dentry *lnet_debugfs_root; |
87643abf | 70 | |
5f37ac93 | 71 | static void kportal_memhog_free(struct libcfs_device_userstate *ldu) |
d7e09d03 PT |
72 | { |
73 | struct page **level0p = &ldu->ldu_memhog_root_page; | |
74 | struct page **level1p; | |
75 | struct page **level2p; | |
76 | int count1; | |
77 | int count2; | |
78 | ||
79 | if (*level0p != NULL) { | |
80 | ||
81 | level1p = (struct page **)page_address(*level0p); | |
82 | count1 = 0; | |
83 | ||
84 | while (count1 < PAGE_CACHE_SIZE/sizeof(struct page *) && | |
85 | *level1p != NULL) { | |
86 | ||
87 | level2p = (struct page **)page_address(*level1p); | |
88 | count2 = 0; | |
89 | ||
90 | while (count2 < PAGE_CACHE_SIZE/sizeof(struct page *) && | |
91 | *level2p != NULL) { | |
92 | ||
93 | __free_page(*level2p); | |
94 | ldu->ldu_memhog_pages--; | |
95 | level2p++; | |
96 | count2++; | |
97 | } | |
98 | ||
99 | __free_page(*level1p); | |
100 | ldu->ldu_memhog_pages--; | |
101 | level1p++; | |
102 | count1++; | |
103 | } | |
104 | ||
105 | __free_page(*level0p); | |
106 | ldu->ldu_memhog_pages--; | |
107 | ||
108 | *level0p = NULL; | |
109 | } | |
110 | ||
5f37ac93 | 111 | LASSERT(ldu->ldu_memhog_pages == 0); |
d7e09d03 PT |
112 | } |
113 | ||
054cd837 | 114 | static int kportal_memhog_alloc(struct libcfs_device_userstate *ldu, int npages, |
cad7aa13 | 115 | gfp_t flags) |
d7e09d03 PT |
116 | { |
117 | struct page **level0p; | |
118 | struct page **level1p; | |
119 | struct page **level2p; | |
120 | int count1; | |
121 | int count2; | |
122 | ||
5f37ac93 LJ |
123 | LASSERT(ldu->ldu_memhog_pages == 0); |
124 | LASSERT(ldu->ldu_memhog_root_page == NULL); | |
d7e09d03 PT |
125 | |
126 | if (npages < 0) | |
127 | return -EINVAL; | |
128 | ||
129 | if (npages == 0) | |
130 | return 0; | |
131 | ||
132 | level0p = &ldu->ldu_memhog_root_page; | |
133 | *level0p = alloc_page(flags); | |
134 | if (*level0p == NULL) | |
135 | return -ENOMEM; | |
136 | ldu->ldu_memhog_pages++; | |
137 | ||
138 | level1p = (struct page **)page_address(*level0p); | |
139 | count1 = 0; | |
140 | memset(level1p, 0, PAGE_CACHE_SIZE); | |
141 | ||
142 | while (ldu->ldu_memhog_pages < npages && | |
143 | count1 < PAGE_CACHE_SIZE/sizeof(struct page *)) { | |
144 | ||
145 | if (cfs_signal_pending()) | |
fbe7c6c7 | 146 | return -EINTR; |
d7e09d03 PT |
147 | |
148 | *level1p = alloc_page(flags); | |
149 | if (*level1p == NULL) | |
150 | return -ENOMEM; | |
151 | ldu->ldu_memhog_pages++; | |
152 | ||
153 | level2p = (struct page **)page_address(*level1p); | |
154 | count2 = 0; | |
155 | memset(level2p, 0, PAGE_CACHE_SIZE); | |
156 | ||
157 | while (ldu->ldu_memhog_pages < npages && | |
158 | count2 < PAGE_CACHE_SIZE/sizeof(struct page *)) { | |
159 | ||
160 | if (cfs_signal_pending()) | |
fbe7c6c7 | 161 | return -EINTR; |
d7e09d03 PT |
162 | |
163 | *level2p = alloc_page(flags); | |
164 | if (*level2p == NULL) | |
fbe7c6c7 | 165 | return -ENOMEM; |
d7e09d03 PT |
166 | ldu->ldu_memhog_pages++; |
167 | ||
168 | level2p++; | |
169 | count2++; | |
170 | } | |
171 | ||
172 | level1p++; | |
173 | count1++; | |
174 | } | |
175 | ||
176 | return 0; | |
177 | } | |
178 | ||
179 | /* called when opening /dev/device */ | |
180 | static int libcfs_psdev_open(unsigned long flags, void *args) | |
181 | { | |
182 | struct libcfs_device_userstate *ldu; | |
d7e09d03 PT |
183 | |
184 | try_module_get(THIS_MODULE); | |
185 | ||
186 | LIBCFS_ALLOC(ldu, sizeof(*ldu)); | |
187 | if (ldu != NULL) { | |
188 | ldu->ldu_memhog_pages = 0; | |
189 | ldu->ldu_memhog_root_page = NULL; | |
190 | } | |
191 | *(struct libcfs_device_userstate **)args = ldu; | |
192 | ||
0a3bdb00 | 193 | return 0; |
d7e09d03 PT |
194 | } |
195 | ||
196 | /* called when closing /dev/device */ | |
197 | static int libcfs_psdev_release(unsigned long flags, void *args) | |
198 | { | |
199 | struct libcfs_device_userstate *ldu; | |
d7e09d03 PT |
200 | |
201 | ldu = (struct libcfs_device_userstate *)args; | |
202 | if (ldu != NULL) { | |
203 | kportal_memhog_free(ldu); | |
204 | LIBCFS_FREE(ldu, sizeof(*ldu)); | |
205 | } | |
206 | ||
207 | module_put(THIS_MODULE); | |
0a3bdb00 | 208 | return 0; |
d7e09d03 PT |
209 | } |
210 | ||
2f4246f7 JS |
211 | static DECLARE_RWSEM(ioctl_list_sem); |
212 | static LIST_HEAD(ioctl_list); | |
d7e09d03 PT |
213 | |
214 | int libcfs_register_ioctl(struct libcfs_ioctl_handler *hand) | |
215 | { | |
216 | int rc = 0; | |
217 | ||
218 | down_write(&ioctl_list_sem); | |
219 | if (!list_empty(&hand->item)) | |
220 | rc = -EBUSY; | |
221 | else | |
222 | list_add_tail(&hand->item, &ioctl_list); | |
223 | up_write(&ioctl_list_sem); | |
224 | ||
225 | return rc; | |
226 | } | |
227 | EXPORT_SYMBOL(libcfs_register_ioctl); | |
228 | ||
229 | int libcfs_deregister_ioctl(struct libcfs_ioctl_handler *hand) | |
230 | { | |
231 | int rc = 0; | |
232 | ||
233 | down_write(&ioctl_list_sem); | |
234 | if (list_empty(&hand->item)) | |
235 | rc = -ENOENT; | |
236 | else | |
237 | list_del_init(&hand->item); | |
238 | up_write(&ioctl_list_sem); | |
239 | ||
240 | return rc; | |
241 | } | |
242 | EXPORT_SYMBOL(libcfs_deregister_ioctl); | |
243 | ||
1d8cb70c | 244 | static int libcfs_ioctl_int(struct cfs_psdev_file *pfile, unsigned long cmd, |
d7e09d03 PT |
245 | void *arg, struct libcfs_ioctl_data *data) |
246 | { | |
247 | int err = -EINVAL; | |
d7e09d03 PT |
248 | |
249 | switch (cmd) { | |
250 | case IOC_LIBCFS_CLEAR_DEBUG: | |
251 | libcfs_debug_clear_buffer(); | |
0a3bdb00 | 252 | return 0; |
d7e09d03 PT |
253 | /* |
254 | * case IOC_LIBCFS_PANIC: | |
255 | * Handled in arch/cfs_module.c | |
256 | */ | |
257 | case IOC_LIBCFS_MARK_DEBUG: | |
258 | if (data->ioc_inlbuf1 == NULL || | |
259 | data->ioc_inlbuf1[data->ioc_inllen1 - 1] != '\0') | |
0a3bdb00 | 260 | return -EINVAL; |
d7e09d03 | 261 | libcfs_debug_mark_buffer(data->ioc_inlbuf1); |
0a3bdb00 | 262 | return 0; |
d7e09d03 PT |
263 | case IOC_LIBCFS_MEMHOG: |
264 | if (pfile->private_data == NULL) { | |
265 | err = -EINVAL; | |
266 | } else { | |
267 | kportal_memhog_free(pfile->private_data); | |
268 | /* XXX The ioc_flags is not GFP flags now, need to be fixed */ | |
269 | err = kportal_memhog_alloc(pfile->private_data, | |
270 | data->ioc_count, | |
271 | data->ioc_flags); | |
272 | if (err != 0) | |
273 | kportal_memhog_free(pfile->private_data); | |
274 | } | |
275 | break; | |
276 | ||
d7e09d03 PT |
277 | default: { |
278 | struct libcfs_ioctl_handler *hand; | |
50ffcb7e | 279 | |
d7e09d03 PT |
280 | err = -EINVAL; |
281 | down_read(&ioctl_list_sem); | |
282 | list_for_each_entry(hand, &ioctl_list, item) { | |
283 | err = hand->handle_ioctl(cmd, data); | |
284 | if (err != -EINVAL) { | |
285 | if (err == 0) | |
286 | err = libcfs_ioctl_popdata(arg, | |
5f37ac93 | 287 | data, sizeof(*data)); |
d7e09d03 PT |
288 | break; |
289 | } | |
290 | } | |
291 | up_read(&ioctl_list_sem); | |
292 | break; | |
293 | } | |
294 | } | |
295 | ||
0a3bdb00 | 296 | return err; |
d7e09d03 PT |
297 | } |
298 | ||
299 | static int libcfs_ioctl(struct cfs_psdev_file *pfile, unsigned long cmd, void *arg) | |
300 | { | |
301 | char *buf; | |
302 | struct libcfs_ioctl_data *data; | |
303 | int err = 0; | |
d7e09d03 | 304 | |
40113370 | 305 | LIBCFS_ALLOC_GFP(buf, 1024, GFP_KERNEL); |
d7e09d03 | 306 | if (buf == NULL) |
0a3bdb00 | 307 | return -ENOMEM; |
d7e09d03 PT |
308 | |
309 | /* 'cmd' and permissions get checked in our arch-specific caller */ | |
94858fec | 310 | if (libcfs_ioctl_getdata(buf, buf + 800, arg)) { |
d7e09d03 | 311 | CERROR("PORTALS ioctl: data error\n"); |
fc5c7f3d JL |
312 | err = -EINVAL; |
313 | goto out; | |
d7e09d03 PT |
314 | } |
315 | data = (struct libcfs_ioctl_data *)buf; | |
316 | ||
317 | err = libcfs_ioctl_int(pfile, cmd, arg, data); | |
318 | ||
319 | out: | |
320 | LIBCFS_FREE(buf, 1024); | |
0a3bdb00 | 321 | return err; |
d7e09d03 PT |
322 | } |
323 | ||
d7e09d03 PT |
324 | struct cfs_psdev_ops libcfs_psdev_ops = { |
325 | libcfs_psdev_open, | |
326 | libcfs_psdev_release, | |
327 | NULL, | |
328 | NULL, | |
329 | libcfs_ioctl | |
330 | }; | |
331 | ||
87643abf MT |
332 | static int proc_call_handler(void *data, int write, loff_t *ppos, |
333 | void __user *buffer, size_t *lenp, | |
334 | int (*handler)(void *data, int write, | |
335 | loff_t pos, void __user *buffer, int len)) | |
336 | { | |
337 | int rc = handler(data, write, *ppos, buffer, *lenp); | |
338 | ||
339 | if (rc < 0) | |
340 | return rc; | |
341 | ||
342 | if (write) { | |
343 | *ppos += *lenp; | |
344 | } else { | |
345 | *lenp = rc; | |
346 | *ppos += rc; | |
347 | } | |
348 | return 0; | |
349 | } | |
350 | ||
351 | static int __proc_dobitmasks(void *data, int write, | |
352 | loff_t pos, void __user *buffer, int nob) | |
353 | { | |
354 | const int tmpstrlen = 512; | |
355 | char *tmpstr; | |
356 | int rc; | |
357 | unsigned int *mask = data; | |
358 | int is_subsys = (mask == &libcfs_subsystem_debug) ? 1 : 0; | |
359 | int is_printk = (mask == &libcfs_printk) ? 1 : 0; | |
360 | ||
361 | rc = cfs_trace_allocate_string_buffer(&tmpstr, tmpstrlen); | |
362 | if (rc < 0) | |
363 | return rc; | |
364 | ||
365 | if (!write) { | |
366 | libcfs_debug_mask2str(tmpstr, tmpstrlen, *mask, is_subsys); | |
367 | rc = strlen(tmpstr); | |
368 | ||
369 | if (pos >= rc) { | |
370 | rc = 0; | |
371 | } else { | |
372 | rc = cfs_trace_copyout_string(buffer, nob, | |
373 | tmpstr + pos, "\n"); | |
374 | } | |
375 | } else { | |
376 | rc = cfs_trace_copyin_string(tmpstr, tmpstrlen, buffer, nob); | |
377 | if (rc < 0) { | |
e4ce7f77 | 378 | kfree(tmpstr); |
87643abf MT |
379 | return rc; |
380 | } | |
381 | ||
382 | rc = libcfs_debug_str2mask(mask, tmpstr, is_subsys); | |
383 | /* Always print LBUG/LASSERT to console, so keep this mask */ | |
384 | if (is_printk) | |
385 | *mask |= D_EMERG; | |
386 | } | |
387 | ||
e4ce7f77 | 388 | kfree(tmpstr); |
87643abf MT |
389 | return rc; |
390 | } | |
391 | ||
392 | static int proc_dobitmasks(struct ctl_table *table, int write, | |
393 | void __user *buffer, size_t *lenp, loff_t *ppos) | |
394 | { | |
395 | return proc_call_handler(table->data, write, ppos, buffer, lenp, | |
396 | __proc_dobitmasks); | |
397 | } | |
398 | ||
87643abf MT |
399 | static int __proc_dump_kernel(void *data, int write, |
400 | loff_t pos, void __user *buffer, int nob) | |
401 | { | |
402 | if (!write) | |
403 | return 0; | |
404 | ||
405 | return cfs_trace_dump_debug_buffer_usrstr(buffer, nob); | |
406 | } | |
407 | ||
408 | static int proc_dump_kernel(struct ctl_table *table, int write, | |
409 | void __user *buffer, size_t *lenp, loff_t *ppos) | |
410 | { | |
411 | return proc_call_handler(table->data, write, ppos, buffer, lenp, | |
412 | __proc_dump_kernel); | |
413 | } | |
414 | ||
415 | static int __proc_daemon_file(void *data, int write, | |
416 | loff_t pos, void __user *buffer, int nob) | |
417 | { | |
418 | if (!write) { | |
419 | int len = strlen(cfs_tracefile); | |
420 | ||
421 | if (pos >= len) | |
422 | return 0; | |
423 | ||
424 | return cfs_trace_copyout_string(buffer, nob, | |
425 | cfs_tracefile + pos, "\n"); | |
426 | } | |
427 | ||
428 | return cfs_trace_daemon_command_usrstr(buffer, nob); | |
429 | } | |
430 | ||
431 | static int proc_daemon_file(struct ctl_table *table, int write, | |
432 | void __user *buffer, size_t *lenp, loff_t *ppos) | |
433 | { | |
434 | return proc_call_handler(table->data, write, ppos, buffer, lenp, | |
435 | __proc_daemon_file); | |
436 | } | |
437 | ||
87643abf MT |
438 | static int libcfs_force_lbug(struct ctl_table *table, int write, |
439 | void __user *buffer, | |
440 | size_t *lenp, loff_t *ppos) | |
441 | { | |
442 | if (write) | |
443 | LBUG(); | |
444 | return 0; | |
445 | } | |
446 | ||
447 | static int proc_fail_loc(struct ctl_table *table, int write, | |
448 | void __user *buffer, | |
449 | size_t *lenp, loff_t *ppos) | |
450 | { | |
451 | int rc; | |
452 | long old_fail_loc = cfs_fail_loc; | |
453 | ||
454 | rc = proc_doulongvec_minmax(table, write, buffer, lenp, ppos); | |
455 | if (old_fail_loc != cfs_fail_loc) | |
456 | wake_up(&cfs_race_waitq); | |
457 | return rc; | |
458 | } | |
459 | ||
460 | static int __proc_cpt_table(void *data, int write, | |
461 | loff_t pos, void __user *buffer, int nob) | |
462 | { | |
463 | char *buf = NULL; | |
464 | int len = 4096; | |
465 | int rc = 0; | |
466 | ||
467 | if (write) | |
468 | return -EPERM; | |
469 | ||
470 | LASSERT(cfs_cpt_table != NULL); | |
471 | ||
472 | while (1) { | |
473 | LIBCFS_ALLOC(buf, len); | |
474 | if (buf == NULL) | |
475 | return -ENOMEM; | |
476 | ||
477 | rc = cfs_cpt_table_print(cfs_cpt_table, buf, len); | |
478 | if (rc >= 0) | |
479 | break; | |
480 | ||
481 | if (rc == -EFBIG) { | |
482 | LIBCFS_FREE(buf, len); | |
483 | len <<= 1; | |
484 | continue; | |
485 | } | |
486 | goto out; | |
487 | } | |
488 | ||
489 | if (pos >= rc) { | |
490 | rc = 0; | |
491 | goto out; | |
492 | } | |
493 | ||
494 | rc = cfs_trace_copyout_string(buffer, nob, buf + pos, NULL); | |
495 | out: | |
496 | if (buf != NULL) | |
497 | LIBCFS_FREE(buf, len); | |
498 | return rc; | |
499 | } | |
500 | ||
501 | static int proc_cpt_table(struct ctl_table *table, int write, | |
502 | void __user *buffer, size_t *lenp, loff_t *ppos) | |
503 | { | |
504 | return proc_call_handler(table->data, write, ppos, buffer, lenp, | |
505 | __proc_cpt_table); | |
506 | } | |
507 | ||
508 | static struct ctl_table lnet_table[] = { | |
509 | /* | |
510 | * NB No .strategy entries have been provided since sysctl(8) prefers | |
511 | * to go via /proc for portability. | |
512 | */ | |
513 | { | |
514 | .procname = "debug", | |
515 | .data = &libcfs_debug, | |
516 | .maxlen = sizeof(int), | |
517 | .mode = 0644, | |
518 | .proc_handler = &proc_dobitmasks, | |
519 | }, | |
520 | { | |
521 | .procname = "subsystem_debug", | |
522 | .data = &libcfs_subsystem_debug, | |
523 | .maxlen = sizeof(int), | |
524 | .mode = 0644, | |
525 | .proc_handler = &proc_dobitmasks, | |
526 | }, | |
527 | { | |
528 | .procname = "printk", | |
529 | .data = &libcfs_printk, | |
530 | .maxlen = sizeof(int), | |
531 | .mode = 0644, | |
532 | .proc_handler = &proc_dobitmasks, | |
533 | }, | |
87643abf MT |
534 | { |
535 | .procname = "cpu_partition_table", | |
536 | .maxlen = 128, | |
537 | .mode = 0444, | |
538 | .proc_handler = &proc_cpt_table, | |
539 | }, | |
540 | ||
541 | { | |
542 | .procname = "upcall", | |
543 | .data = lnet_upcall, | |
544 | .maxlen = sizeof(lnet_upcall), | |
545 | .mode = 0644, | |
546 | .proc_handler = &proc_dostring, | |
547 | }, | |
548 | { | |
549 | .procname = "debug_log_upcall", | |
550 | .data = lnet_debug_log_upcall, | |
551 | .maxlen = sizeof(lnet_debug_log_upcall), | |
552 | .mode = 0644, | |
553 | .proc_handler = &proc_dostring, | |
554 | }, | |
87643abf MT |
555 | { |
556 | .procname = "catastrophe", | |
557 | .data = &libcfs_catastrophe, | |
558 | .maxlen = sizeof(int), | |
559 | .mode = 0444, | |
560 | .proc_handler = &proc_dointvec, | |
561 | }, | |
87643abf MT |
562 | { |
563 | .procname = "dump_kernel", | |
564 | .maxlen = 256, | |
565 | .mode = 0200, | |
566 | .proc_handler = &proc_dump_kernel, | |
567 | }, | |
568 | { | |
569 | .procname = "daemon_file", | |
570 | .mode = 0644, | |
571 | .maxlen = 256, | |
572 | .proc_handler = &proc_daemon_file, | |
573 | }, | |
87643abf MT |
574 | { |
575 | .procname = "force_lbug", | |
576 | .data = NULL, | |
577 | .maxlen = 0, | |
578 | .mode = 0200, | |
579 | .proc_handler = &libcfs_force_lbug | |
580 | }, | |
581 | { | |
582 | .procname = "fail_loc", | |
583 | .data = &cfs_fail_loc, | |
584 | .maxlen = sizeof(cfs_fail_loc), | |
585 | .mode = 0644, | |
586 | .proc_handler = &proc_fail_loc | |
587 | }, | |
588 | { | |
589 | .procname = "fail_val", | |
590 | .data = &cfs_fail_val, | |
591 | .maxlen = sizeof(int), | |
592 | .mode = 0644, | |
593 | .proc_handler = &proc_dointvec | |
594 | }, | |
595 | { | |
596 | } | |
597 | }; | |
598 | ||
a8365826 | 599 | static const struct lnet_debugfs_symlink_def lnet_debugfs_symlinks[] = { |
8710427d OD |
600 | { "console_ratelimit", |
601 | "/sys/module/libcfs/parameters/libcfs_console_ratelimit"}, | |
602 | { "debug_path", | |
603 | "/sys/module/libcfs/parameters/libcfs_debug_file_path"}, | |
604 | { "panic_on_lbug", | |
605 | "/sys/module/libcfs/parameters/libcfs_panic_on_lbug"}, | |
606 | { "libcfs_console_backoff", | |
607 | "/sys/module/libcfs/parameters/libcfs_console_backoff"}, | |
8dc08446 OD |
608 | { "debug_mb", |
609 | "/sys/module/libcfs/parameters/libcfs_debug_mb"}, | |
35ca907d DE |
610 | { "console_min_delay_centisecs", |
611 | "/sys/module/libcfs/parameters/libcfs_console_min_delay"}, | |
612 | { "console_max_delay_centisecs", | |
613 | "/sys/module/libcfs/parameters/libcfs_console_max_delay"}, | |
8710427d OD |
614 | {}, |
615 | }; | |
616 | ||
0871d551 OD |
617 | static ssize_t lnet_debugfs_read(struct file *filp, char __user *buf, |
618 | size_t count, loff_t *ppos) | |
87643abf | 619 | { |
0871d551 OD |
620 | struct ctl_table *table = filp->private_data; |
621 | int error; | |
622 | ||
623 | error = table->proc_handler(table, 0, (void __user *)buf, &count, ppos); | |
624 | if (!error) | |
625 | error = count; | |
626 | ||
627 | return error; | |
628 | } | |
629 | ||
630 | static ssize_t lnet_debugfs_write(struct file *filp, const char __user *buf, | |
631 | size_t count, loff_t *ppos) | |
632 | { | |
633 | struct ctl_table *table = filp->private_data; | |
634 | int error; | |
635 | ||
636 | error = table->proc_handler(table, 1, (void __user *)buf, &count, ppos); | |
637 | if (!error) | |
638 | error = count; | |
639 | ||
640 | return error; | |
641 | } | |
642 | ||
643 | static const struct file_operations lnet_debugfs_file_operations = { | |
644 | .open = simple_open, | |
645 | .read = lnet_debugfs_read, | |
646 | .write = lnet_debugfs_write, | |
647 | .llseek = default_llseek, | |
87643abf MT |
648 | }; |
649 | ||
b03f395a OD |
650 | void lustre_insert_debugfs(struct ctl_table *table, |
651 | const struct lnet_debugfs_symlink_def *symlinks) | |
87643abf | 652 | { |
0871d551 OD |
653 | struct dentry *entry; |
654 | ||
655 | if (lnet_debugfs_root == NULL) | |
656 | lnet_debugfs_root = debugfs_create_dir("lnet", NULL); | |
657 | ||
658 | /* Even if we cannot create, just ignore it altogether) */ | |
659 | if (IS_ERR_OR_NULL(lnet_debugfs_root)) | |
660 | return; | |
661 | ||
b03f395a | 662 | for (; table->procname; table++) |
0871d551 OD |
663 | entry = debugfs_create_file(table->procname, table->mode, |
664 | lnet_debugfs_root, table, | |
665 | &lnet_debugfs_file_operations); | |
8710427d | 666 | |
b03f395a | 667 | for (; symlinks && symlinks->name; symlinks++) |
8710427d OD |
668 | entry = debugfs_create_symlink(symlinks->name, |
669 | lnet_debugfs_root, | |
670 | symlinks->target); | |
671 | ||
87643abf | 672 | } |
b03f395a | 673 | EXPORT_SYMBOL_GPL(lustre_insert_debugfs); |
87643abf | 674 | |
b03f395a | 675 | static void lustre_remove_debugfs(void) |
87643abf | 676 | { |
0871d551 OD |
677 | if (lnet_debugfs_root != NULL) |
678 | debugfs_remove_recursive(lnet_debugfs_root); | |
87643abf | 679 | |
0871d551 | 680 | lnet_debugfs_root = NULL; |
87643abf MT |
681 | } |
682 | ||
b03f395a OD |
683 | static int init_libcfs_module(void) |
684 | { | |
685 | int rc; | |
686 | ||
b03f395a OD |
687 | rc = libcfs_debug_init(5 * 1024 * 1024); |
688 | if (rc < 0) { | |
689 | pr_err("LustreError: libcfs_debug_init: %d\n", rc); | |
690 | return rc; | |
691 | } | |
692 | ||
693 | rc = cfs_cpu_init(); | |
694 | if (rc != 0) | |
695 | goto cleanup_debug; | |
696 | ||
697 | rc = misc_register(&libcfs_dev); | |
698 | if (rc) { | |
699 | CERROR("misc_register: error %d\n", rc); | |
700 | goto cleanup_cpu; | |
701 | } | |
702 | ||
703 | rc = cfs_wi_startup(); | |
704 | if (rc) { | |
705 | CERROR("initialize workitem: error %d\n", rc); | |
706 | goto cleanup_deregister; | |
707 | } | |
708 | ||
709 | /* max to 4 threads, should be enough for rehash */ | |
710 | rc = min(cfs_cpt_weight(cfs_cpt_table, CFS_CPT_ANY), 4); | |
711 | rc = cfs_wi_sched_create("cfs_rh", cfs_cpt_table, CFS_CPT_ANY, | |
712 | rc, &cfs_sched_rehash); | |
713 | if (rc != 0) { | |
714 | CERROR("Startup workitem scheduler: error: %d\n", rc); | |
715 | goto cleanup_deregister; | |
716 | } | |
717 | ||
718 | rc = cfs_crypto_register(); | |
719 | if (rc) { | |
720 | CERROR("cfs_crypto_register: error %d\n", rc); | |
721 | goto cleanup_wi; | |
722 | } | |
723 | ||
724 | lustre_insert_debugfs(lnet_table, lnet_debugfs_symlinks); | |
725 | ||
726 | CDEBUG(D_OTHER, "portals setup OK\n"); | |
727 | return 0; | |
728 | cleanup_wi: | |
729 | cfs_wi_shutdown(); | |
730 | cleanup_deregister: | |
731 | misc_deregister(&libcfs_dev); | |
732 | cleanup_cpu: | |
733 | cfs_cpu_fini(); | |
734 | cleanup_debug: | |
735 | libcfs_debug_cleanup(); | |
736 | return rc; | |
737 | } | |
738 | ||
739 | static void exit_libcfs_module(void) | |
740 | { | |
741 | int rc; | |
742 | ||
743 | lustre_remove_debugfs(); | |
744 | ||
745 | if (cfs_sched_rehash) { | |
746 | cfs_wi_sched_destroy(cfs_sched_rehash); | |
747 | cfs_sched_rehash = NULL; | |
748 | } | |
749 | ||
750 | cfs_crypto_unregister(); | |
751 | cfs_wi_shutdown(); | |
752 | ||
753 | misc_deregister(&libcfs_dev); | |
754 | ||
755 | cfs_cpu_fini(); | |
756 | ||
757 | rc = libcfs_debug_cleanup(); | |
758 | if (rc) | |
759 | pr_err("LustreError: libcfs_debug_cleanup: %d\n", rc); | |
b03f395a OD |
760 | } |
761 | ||
6960736c | 762 | MODULE_VERSION("1.0.0"); |
87643abf | 763 | |
6960736c GKH |
764 | module_init(init_libcfs_module); |
765 | module_exit(exit_libcfs_module); |