]> git.proxmox.com Git - mirror_ubuntu-zesty-kernel.git/blob - fs/ocfs2/dlm/dlmdebug.c
projects / mirror_ubuntu-zesty-kernel.git / blob
? search:
summary | shortlog | log | commit | commitdiff | tree
blame | history | raw | HEAD
ocfs2/dlm: Cleanup lockres print
[mirror_ubuntu-zesty-kernel.git] / fs / ocfs2 / dlm / dlmdebug.c
1 /* -*- mode: c; c-basic-offset: 8; -*-
2 * vim: noexpandtab sw=8 ts=8 sts=0:
3 *
4 * dlmdebug.c
5 *
6 * debug functionality for the dlm
7 *
8 * Copyright (C) 2004, 2008 Oracle. All rights reserved.
9 *
10 * This program is free software; you can redistribute it and/or
11 * modify it under the terms of the GNU General Public
12 * License as published by the Free Software Foundation; either
13 * version 2 of the License, or (at your option) any later version.
14 *
15 * This program is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
18 * General Public License for more details.
19 *
20 * You should have received a copy of the GNU General Public
21 * License along with this program; if not, write to the
22 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
23 * Boston, MA 021110-1307, USA.
24 *
25 */
26
27 #include <linux/types.h>
28 #include <linux/slab.h>
29 #include <linux/highmem.h>
30 #include <linux/utsname.h>
31 #include <linux/sysctl.h>
32 #include <linux/spinlock.h>
33 #include <linux/debugfs.h>
34
35 #include "cluster/heartbeat.h"
36 #include "cluster/nodemanager.h"
37 #include "cluster/tcp.h"
38
39 #include "dlmapi.h"
40 #include "dlmcommon.h"
41 #include "dlmdomain.h"
42 #include "dlmdebug.h"
43
44 #define MLOG_MASK_PREFIX ML_DLM
45 #include "cluster/masklog.h"
46
47 int stringify_lockname(const char *lockname, int locklen, char *buf, int len);
48
49 void dlm_print_one_lock_resource(struct dlm_lock_resource *res)
50 {
51 spin_lock(&res->spinlock);
52 __dlm_print_one_lock_resource(res);
53 spin_unlock(&res->spinlock);
54 }
55
56 static void dlm_print_lockres_refmap(struct dlm_lock_resource *res)
57 {
58 int bit;
59 assert_spin_locked(&res->spinlock);
60
61 printk(" refmap nodes: [ ");
62 bit = 0;
63 while (1) {
64 bit = find_next_bit(res->refmap, O2NM_MAX_NODES, bit);
65 if (bit >= O2NM_MAX_NODES)
66 break;
67 printk("%u ", bit);
68 bit++;
69 }
70 printk("], inflight=%u\n", res->inflight_locks);
71 }
72
73 static void __dlm_print_lock(struct dlm_lock *lock)
74 {
75 spin_lock(&lock->spinlock);
76
77 printk(" type=%d, conv=%d, node=%u, cookie=%u:%llu, "
78 "ref=%u, ast=(empty=%c,pend=%c), bast=(empty=%c,pend=%c), "
79 "pending=(conv=%c,lock=%c,cancel=%c,unlock=%c)\n",
80 lock->ml.type, lock->ml.convert_type, lock->ml.node,
81 dlm_get_lock_cookie_node(be64_to_cpu(lock->ml.cookie)),
82 dlm_get_lock_cookie_seq(be64_to_cpu(lock->ml.cookie)),
83 atomic_read(&lock->lock_refs.refcount),
84 (list_empty(&lock->ast_list) ? 'y' : 'n'),
85 (lock->ast_pending ? 'y' : 'n'),
86 (list_empty(&lock->bast_list) ? 'y' : 'n'),
87 (lock->bast_pending ? 'y' : 'n'),
88 (lock->convert_pending ? 'y' : 'n'),
89 (lock->lock_pending ? 'y' : 'n'),
90 (lock->cancel_pending ? 'y' : 'n'),
91 (lock->unlock_pending ? 'y' : 'n'));
92
93 spin_unlock(&lock->spinlock);
94 }
95
96 void __dlm_print_one_lock_resource(struct dlm_lock_resource *res)
97 {
98 struct list_head *iter2;
99 struct dlm_lock *lock;
100 char buf[DLM_LOCKID_NAME_MAX];
101
102 assert_spin_locked(&res->spinlock);
103
104 stringify_lockname(res->lockname.name, res->lockname.len,
105 buf, sizeof(buf) - 1);
106 printk("lockres: %s, owner=%u, state=%u\n",
107 buf, res->owner, res->state);
108 printk(" last used: %lu, refcnt: %u, on purge list: %s\n",
109 res->last_used, atomic_read(&res->refs.refcount),
110 list_empty(&res->purge) ? "no" : "yes");
111 printk(" on dirty list: %s, on reco list: %s, "
112 "migrating pending: %s\n",
113 list_empty(&res->dirty) ? "no" : "yes",
114 list_empty(&res->recovering) ? "no" : "yes",
115 res->migration_pending ? "yes" : "no");
116 printk(" inflight locks: %d, asts reserved: %d\n",
117 res->inflight_locks, atomic_read(&res->asts_reserved));
118 dlm_print_lockres_refmap(res);
119 printk(" granted queue:\n");
120 list_for_each(iter2, &res->granted) {
121 lock = list_entry(iter2, struct dlm_lock, list);
122 __dlm_print_lock(lock);
123 }
124 printk(" converting queue:\n");
125 list_for_each(iter2, &res->converting) {
126 lock = list_entry(iter2, struct dlm_lock, list);
127 __dlm_print_lock(lock);
128 }
129 printk(" blocked queue:\n");
130 list_for_each(iter2, &res->blocked) {
131 lock = list_entry(iter2, struct dlm_lock, list);
132 __dlm_print_lock(lock);
133 }
134 }
135
136 void dlm_print_one_lock(struct dlm_lock *lockid)
137 {
138 dlm_print_one_lock_resource(lockid->lockres);
139 }
140 EXPORT_SYMBOL_GPL(dlm_print_one_lock);
141
142 static const char *dlm_errnames[] = {
143 [DLM_NORMAL] = "DLM_NORMAL",
144 [DLM_GRANTED] = "DLM_GRANTED",
145 [DLM_DENIED] = "DLM_DENIED",
146 [DLM_DENIED_NOLOCKS] = "DLM_DENIED_NOLOCKS",
147 [DLM_WORKING] = "DLM_WORKING",
148 [DLM_BLOCKED] = "DLM_BLOCKED",
149 [DLM_BLOCKED_ORPHAN] = "DLM_BLOCKED_ORPHAN",
150 [DLM_DENIED_GRACE_PERIOD] = "DLM_DENIED_GRACE_PERIOD",
151 [DLM_SYSERR] = "DLM_SYSERR",
152 [DLM_NOSUPPORT] = "DLM_NOSUPPORT",
153 [DLM_CANCELGRANT] = "DLM_CANCELGRANT",
154 [DLM_IVLOCKID] = "DLM_IVLOCKID",
155 [DLM_SYNC] = "DLM_SYNC",
156 [DLM_BADTYPE] = "DLM_BADTYPE",
157 [DLM_BADRESOURCE] = "DLM_BADRESOURCE",
158 [DLM_MAXHANDLES] = "DLM_MAXHANDLES",
159 [DLM_NOCLINFO] = "DLM_NOCLINFO",
160 [DLM_NOLOCKMGR] = "DLM_NOLOCKMGR",
161 [DLM_NOPURGED] = "DLM_NOPURGED",
162 [DLM_BADARGS] = "DLM_BADARGS",
163 [DLM_VOID] = "DLM_VOID",
164 [DLM_NOTQUEUED] = "DLM_NOTQUEUED",
165 [DLM_IVBUFLEN] = "DLM_IVBUFLEN",
166 [DLM_CVTUNGRANT] = "DLM_CVTUNGRANT",
167 [DLM_BADPARAM] = "DLM_BADPARAM",
168 [DLM_VALNOTVALID] = "DLM_VALNOTVALID",
169 [DLM_REJECTED] = "DLM_REJECTED",
170 [DLM_ABORT] = "DLM_ABORT",
171 [DLM_CANCEL] = "DLM_CANCEL",
172 [DLM_IVRESHANDLE] = "DLM_IVRESHANDLE",
173 [DLM_DEADLOCK] = "DLM_DEADLOCK",
174 [DLM_DENIED_NOASTS] = "DLM_DENIED_NOASTS",
175 [DLM_FORWARD] = "DLM_FORWARD",
176 [DLM_TIMEOUT] = "DLM_TIMEOUT",
177 [DLM_IVGROUPID] = "DLM_IVGROUPID",
178 [DLM_VERS_CONFLICT] = "DLM_VERS_CONFLICT",
179 [DLM_BAD_DEVICE_PATH] = "DLM_BAD_DEVICE_PATH",
180 [DLM_NO_DEVICE_PERMISSION] = "DLM_NO_DEVICE_PERMISSION",
181 [DLM_NO_CONTROL_DEVICE ] = "DLM_NO_CONTROL_DEVICE ",
182 [DLM_RECOVERING] = "DLM_RECOVERING",
183 [DLM_MIGRATING] = "DLM_MIGRATING",
184 [DLM_MAXSTATS] = "DLM_MAXSTATS",
185 };
186
187 static const char *dlm_errmsgs[] = {
188 [DLM_NORMAL] = "request in progress",
189 [DLM_GRANTED] = "request granted",
190 [DLM_DENIED] = "request denied",
191 [DLM_DENIED_NOLOCKS] = "request denied, out of system resources",
192 [DLM_WORKING] = "async request in progress",
193 [DLM_BLOCKED] = "lock request blocked",
194 [DLM_BLOCKED_ORPHAN] = "lock request blocked by a orphan lock",
195 [DLM_DENIED_GRACE_PERIOD] = "topological change in progress",
196 [DLM_SYSERR] = "system error",
197 [DLM_NOSUPPORT] = "unsupported",
198 [DLM_CANCELGRANT] = "can't cancel convert: already granted",
199 [DLM_IVLOCKID] = "bad lockid",
200 [DLM_SYNC] = "synchronous request granted",
201 [DLM_BADTYPE] = "bad resource type",
202 [DLM_BADRESOURCE] = "bad resource handle",
203 [DLM_MAXHANDLES] = "no more resource handles",
204 [DLM_NOCLINFO] = "can't contact cluster manager",
205 [DLM_NOLOCKMGR] = "can't contact lock manager",
206 [DLM_NOPURGED] = "can't contact purge daemon",
207 [DLM_BADARGS] = "bad api args",
208 [DLM_VOID] = "no status",
209 [DLM_NOTQUEUED] = "NOQUEUE was specified and request failed",
210 [DLM_IVBUFLEN] = "invalid resource name length",
211 [DLM_CVTUNGRANT] = "attempted to convert ungranted lock",
212 [DLM_BADPARAM] = "invalid lock mode specified",
213 [DLM_VALNOTVALID] = "value block has been invalidated",
214 [DLM_REJECTED] = "request rejected, unrecognized client",
215 [DLM_ABORT] = "blocked lock request cancelled",
216 [DLM_CANCEL] = "conversion request cancelled",
217 [DLM_IVRESHANDLE] = "invalid resource handle",
218 [DLM_DEADLOCK] = "deadlock recovery refused this request",
219 [DLM_DENIED_NOASTS] = "failed to allocate AST",
220 [DLM_FORWARD] = "request must wait for primary's response",
221 [DLM_TIMEOUT] = "timeout value for lock has expired",
222 [DLM_IVGROUPID] = "invalid group specification",
223 [DLM_VERS_CONFLICT] = "version conflicts prevent request handling",
224 [DLM_BAD_DEVICE_PATH] = "Locks device does not exist or path wrong",
225 [DLM_NO_DEVICE_PERMISSION] = "Client has insufficient perms for device",
226 [DLM_NO_CONTROL_DEVICE] = "Cannot set options on opened device ",
227 [DLM_RECOVERING] = "lock resource being recovered",
228 [DLM_MIGRATING] = "lock resource being migrated",
229 [DLM_MAXSTATS] = "invalid error number",
230 };
231
232 const char *dlm_errmsg(enum dlm_status err)
233 {
234 if (err >= DLM_MAXSTATS || err < 0)
235 return dlm_errmsgs[DLM_MAXSTATS];
236 return dlm_errmsgs[err];
237 }
238 EXPORT_SYMBOL_GPL(dlm_errmsg);
239
240 const char *dlm_errname(enum dlm_status err)
241 {
242 if (err >= DLM_MAXSTATS || err < 0)
243 return dlm_errnames[DLM_MAXSTATS];
244 return dlm_errnames[err];
245 }
246 EXPORT_SYMBOL_GPL(dlm_errname);
247
248 /* NOTE: This function converts a lockname into a string. It uses knowledge
249 * of the format of the lockname that should be outside the purview of the dlm.
250 * We are adding only to make dlm debugging slightly easier.
251 *
252 * For more on lockname formats, please refer to dlmglue.c and ocfs2_lockid.h.
253 */
254 int stringify_lockname(const char *lockname, int locklen, char *buf, int len)
255 {
256 int out = 0;
257 __be64 inode_blkno_be;
258
259 #define OCFS2_DENTRY_LOCK_INO_START 18
260 if (*lockname == 'N') {
261 memcpy((__be64 *)&inode_blkno_be,
262 (char *)&lockname[OCFS2_DENTRY_LOCK_INO_START],
263 sizeof(__be64));
264 out += snprintf(buf + out, len - out, "%.*s%08x",
265 OCFS2_DENTRY_LOCK_INO_START - 1, lockname,
266 (unsigned int)be64_to_cpu(inode_blkno_be));
267 } else
268 out += snprintf(buf + out, len - out, "%.*s",
269 locklen, lockname);
270 return out;
271 }
272
273 static int stringify_nodemap(unsigned long *nodemap, int maxnodes,
274 char *buf, int len)
275 {
276 int out = 0;
277 int i = -1;
278
279 while ((i = find_next_bit(nodemap, maxnodes, i + 1)) < maxnodes)
280 out += snprintf(buf + out, len - out, "%d ", i);
281
282 return out;
283 }
284
285 static int dump_mle(struct dlm_master_list_entry *mle, char *buf, int len)
286 {
287 int out = 0;
288 unsigned int namelen;
289 const char *name;
290 char *mle_type;
291
292 if (mle->type != DLM_MLE_MASTER) {
293 namelen = mle->u.name.len;
294 name = mle->u.name.name;
295 } else {
296 namelen = mle->u.res->lockname.len;
297 name = mle->u.res->lockname.name;
298 }
299
300 if (mle->type == DLM_MLE_BLOCK)
301 mle_type = "BLK";
302 else if (mle->type == DLM_MLE_MASTER)
303 mle_type = "MAS";
304 else
305 mle_type = "MIG";
306
307 out += stringify_lockname(name, namelen, buf + out, len - out);
308 out += snprintf(buf + out, len - out,
309 "\t%3s\tmas=%3u\tnew=%3u\tevt=%1d\tuse=%1d\tref=%3d\n",
310 mle_type, mle->master, mle->new_master,
311 !list_empty(&mle->hb_events),
312 !!mle->inuse,
313 atomic_read(&mle->mle_refs.refcount));
314
315 out += snprintf(buf + out, len - out, "Maybe=");
316 out += stringify_nodemap(mle->maybe_map, O2NM_MAX_NODES,
317 buf + out, len - out);
318 out += snprintf(buf + out, len - out, "\n");
319
320 out += snprintf(buf + out, len - out, "Vote=");
321 out += stringify_nodemap(mle->vote_map, O2NM_MAX_NODES,
322 buf + out, len - out);
323 out += snprintf(buf + out, len - out, "\n");
324
325 out += snprintf(buf + out, len - out, "Response=");
326 out += stringify_nodemap(mle->response_map, O2NM_MAX_NODES,
327 buf + out, len - out);
328 out += snprintf(buf + out, len - out, "\n");
329
330 out += snprintf(buf + out, len - out, "Node=");
331 out += stringify_nodemap(mle->node_map, O2NM_MAX_NODES,
332 buf + out, len - out);
333 out += snprintf(buf + out, len - out, "\n");
334
335 out += snprintf(buf + out, len - out, "\n");
336
337 return out;
338 }
339
340 void dlm_print_one_mle(struct dlm_master_list_entry *mle)
341 {
342 char *buf;
343
344 buf = (char *) get_zeroed_page(GFP_NOFS);
345 if (buf) {
346 dump_mle(mle, buf, PAGE_SIZE - 1);
347 free_page((unsigned long)buf);
348 }
349 }
350
351 #ifdef CONFIG_DEBUG_FS
352
353 static struct dentry *dlm_debugfs_root = NULL;
354
355 #define DLM_DEBUGFS_DIR "o2dlm"
356 #define DLM_DEBUGFS_DLM_STATE "dlm_state"
357 #define DLM_DEBUGFS_LOCKING_STATE "locking_state"
358 #define DLM_DEBUGFS_MLE_STATE "mle_state"
359 #define DLM_DEBUGFS_PURGE_LIST "purge_list"
360
361 /* begin - utils funcs */
362 static void dlm_debug_free(struct kref *kref)
363 {
364 struct dlm_debug_ctxt *dc;
365
366 dc = container_of(kref, struct dlm_debug_ctxt, debug_refcnt);
367
368 kfree(dc);
369 }
370
371 void dlm_debug_put(struct dlm_debug_ctxt *dc)
372 {
373 if (dc)
374 kref_put(&dc->debug_refcnt, dlm_debug_free);
375 }
376
377 static void dlm_debug_get(struct dlm_debug_ctxt *dc)
378 {
379 kref_get(&dc->debug_refcnt);
380 }
381
382 static struct debug_buffer *debug_buffer_allocate(void)
383 {
384 struct debug_buffer *db = NULL;
385
386 db = kzalloc(sizeof(struct debug_buffer), GFP_KERNEL);
387 if (!db)
388 goto bail;
389
390 db->len = PAGE_SIZE;
391 db->buf = kmalloc(db->len, GFP_KERNEL);
392 if (!db->buf)
393 goto bail;
394
395 return db;
396 bail:
397 kfree(db);
398 return NULL;
399 }
400
401 static ssize_t debug_buffer_read(struct file *file, char __user *buf,
402 size_t nbytes, loff_t *ppos)
403 {
404 struct debug_buffer *db = file->private_data;
405
406 return simple_read_from_buffer(buf, nbytes, ppos, db->buf, db->len);
407 }
408
409 static loff_t debug_buffer_llseek(struct file *file, loff_t off, int whence)
410 {
411 struct debug_buffer *db = file->private_data;
412 loff_t new = -1;
413
414 switch (whence) {
415 case 0:
416 new = off;
417 break;
418 case 1:
419 new = file->f_pos + off;
420 break;
421 }
422
423 if (new < 0 || new > db->len)
424 return -EINVAL;
425
426 return (file->f_pos = new);
427 }
428
429 static int debug_buffer_release(struct inode *inode, struct file *file)
430 {
431 struct debug_buffer *db = (struct debug_buffer *)file->private_data;
432
433 if (db)
434 kfree(db->buf);
435 kfree(db);
436
437 return 0;
438 }
439 /* end - util funcs */
440
441 /* begin - purge list funcs */
442 static int debug_purgelist_print(struct dlm_ctxt *dlm, struct debug_buffer *db)
443 {
444 struct dlm_lock_resource *res;
445 int out = 0;
446 unsigned long total = 0;
447
448 out += snprintf(db->buf + out, db->len - out,
449 "Dumping Purgelist for Domain: %s\n", dlm->name);
450
451 spin_lock(&dlm->spinlock);
452 list_for_each_entry(res, &dlm->purge_list, purge) {
453 ++total;
454 if (db->len - out < 100)
455 continue;
456 spin_lock(&res->spinlock);
457 out += stringify_lockname(res->lockname.name,
458 res->lockname.len,
459 db->buf + out, db->len - out);
460 out += snprintf(db->buf + out, db->len - out, "\t%ld\n",
461 (jiffies - res->last_used)/HZ);
462 spin_unlock(&res->spinlock);
463 }
464 spin_unlock(&dlm->spinlock);
465
466 out += snprintf(db->buf + out, db->len - out,
467 "Total on list: %ld\n", total);
468
469 return out;
470 }
471
472 static int debug_purgelist_open(struct inode *inode, struct file *file)
473 {
474 struct dlm_ctxt *dlm = inode->i_private;
475 struct debug_buffer *db;
476
477 db = debug_buffer_allocate();
478 if (!db)
479 goto bail;
480
481 db->len = debug_purgelist_print(dlm, db);
482
483 file->private_data = db;
484
485 return 0;
486 bail:
487 return -ENOMEM;
488 }
489
490 static struct file_operations debug_purgelist_fops = {
491 .open = debug_purgelist_open,
492 .release = debug_buffer_release,
493 .read = debug_buffer_read,
494 .llseek = debug_buffer_llseek,
495 };
496 /* end - purge list funcs */
497
498 /* begin - debug mle funcs */
499 static int debug_mle_print(struct dlm_ctxt *dlm, struct debug_buffer *db)
500 {
501 struct dlm_master_list_entry *mle;
502 int out = 0;
503 unsigned long total = 0;
504
505 out += snprintf(db->buf + out, db->len - out,
506 "Dumping MLEs for Domain: %s\n", dlm->name);
507
508 spin_lock(&dlm->master_lock);
509 list_for_each_entry(mle, &dlm->master_list, list) {
510 ++total;
511 if (db->len - out < 200)
512 continue;
513 out += dump_mle(mle, db->buf + out, db->len - out);
514 }
515 spin_unlock(&dlm->master_lock);
516
517 out += snprintf(db->buf + out, db->len - out,
518 "Total on list: %ld\n", total);
519 return out;
520 }
521
522 static int debug_mle_open(struct inode *inode, struct file *file)
523 {
524 struct dlm_ctxt *dlm = inode->i_private;
525 struct debug_buffer *db;
526
527 db = debug_buffer_allocate();
528 if (!db)
529 goto bail;
530
531 db->len = debug_mle_print(dlm, db);
532
533 file->private_data = db;
534
535 return 0;
536 bail:
537 return -ENOMEM;
538 }
539
540 static struct file_operations debug_mle_fops = {
541 .open = debug_mle_open,
542 .release = debug_buffer_release,
543 .read = debug_buffer_read,
544 .llseek = debug_buffer_llseek,
545 };
546
547 /* end - debug mle funcs */
548
549 /* begin - debug lockres funcs */
550 static int dump_lock(struct dlm_lock *lock, int list_type, char *buf, int len)
551 {
552 int out;
553
554 #define DEBUG_LOCK_VERSION 1
555 spin_lock(&lock->spinlock);
556 out = snprintf(buf, len, "LOCK:%d,%d,%d,%d,%d,%d:%lld,%d,%d,%d,%d,%d,"
557 "%d,%d,%d,%d\n",
558 DEBUG_LOCK_VERSION,
559 list_type, lock->ml.type, lock->ml.convert_type,
560 lock->ml.node,
561 dlm_get_lock_cookie_node(be64_to_cpu(lock->ml.cookie)),
562 dlm_get_lock_cookie_seq(be64_to_cpu(lock->ml.cookie)),
563 !list_empty(&lock->ast_list),
564 !list_empty(&lock->bast_list),
565 lock->ast_pending, lock->bast_pending,
566 lock->convert_pending, lock->lock_pending,
567 lock->cancel_pending, lock->unlock_pending,
568 atomic_read(&lock->lock_refs.refcount));
569 spin_unlock(&lock->spinlock);
570
571 return out;
572 }
573
574 static int dump_lockres(struct dlm_lock_resource *res, char *buf, int len)
575 {
576 struct dlm_lock *lock;
577 int i;
578 int out = 0;
579
580 out += snprintf(buf + out, len - out, "NAME:");
581 out += stringify_lockname(res->lockname.name, res->lockname.len,
582 buf + out, len - out);
583 out += snprintf(buf + out, len - out, "\n");
584
585 #define DEBUG_LRES_VERSION 1
586 out += snprintf(buf + out, len - out,
587 "LRES:%d,%d,%d,%ld,%d,%d,%d,%d,%d,%d,%d\n",
588 DEBUG_LRES_VERSION,
589 res->owner, res->state, res->last_used,
590 !list_empty(&res->purge),
591 !list_empty(&res->dirty),
592 !list_empty(&res->recovering),
593 res->inflight_locks, res->migration_pending,
594 atomic_read(&res->asts_reserved),
595 atomic_read(&res->refs.refcount));
596
597 /* refmap */
598 out += snprintf(buf + out, len - out, "RMAP:");
599 out += stringify_nodemap(res->refmap, O2NM_MAX_NODES,
600 buf + out, len - out);
601 out += snprintf(buf + out, len - out, "\n");
602
603 /* lvb */
604 out += snprintf(buf + out, len - out, "LVBX:");
605 for (i = 0; i < DLM_LVB_LEN; i++)
606 out += snprintf(buf + out, len - out,
607 "%02x", (unsigned char)res->lvb[i]);
608 out += snprintf(buf + out, len - out, "\n");
609
610 /* granted */
611 list_for_each_entry(lock, &res->granted, list)
612 out += dump_lock(lock, 0, buf + out, len - out);
613
614 /* converting */
615 list_for_each_entry(lock, &res->converting, list)
616 out += dump_lock(lock, 1, buf + out, len - out);
617
618 /* blocked */
619 list_for_each_entry(lock, &res->blocked, list)
620 out += dump_lock(lock, 2, buf + out, len - out);
621
622 out += snprintf(buf + out, len - out, "\n");
623
624 return out;
625 }
626
627 static void *lockres_seq_start(struct seq_file *m, loff_t *pos)
628 {
629 struct debug_lockres *dl = m->private;
630 struct dlm_ctxt *dlm = dl->dl_ctxt;
631 struct dlm_lock_resource *res = NULL;
632
633 spin_lock(&dlm->spinlock);
634
635 if (dl->dl_res) {
636 list_for_each_entry(res, &dl->dl_res->tracking, tracking) {
637 if (dl->dl_res) {
638 dlm_lockres_put(dl->dl_res);
639 dl->dl_res = NULL;
640 }
641 if (&res->tracking == &dlm->tracking_list) {
642 mlog(0, "End of list found, %p\n", res);
643 dl = NULL;
644 break;
645 }
646 dlm_lockres_get(res);
647 dl->dl_res = res;
648 break;
649 }
650 } else {
651 if (!list_empty(&dlm->tracking_list)) {
652 list_for_each_entry(res, &dlm->tracking_list, tracking)
653 break;
654 dlm_lockres_get(res);
655 dl->dl_res = res;
656 } else
657 dl = NULL;
658 }
659
660 if (dl) {
661 spin_lock(&dl->dl_res->spinlock);
662 dump_lockres(dl->dl_res, dl->dl_buf, dl->dl_len - 1);
663 spin_unlock(&dl->dl_res->spinlock);
664 }
665
666 spin_unlock(&dlm->spinlock);
667
668 return dl;
669 }
670
671 static void lockres_seq_stop(struct seq_file *m, void *v)
672 {
673 }
674
675 static void *lockres_seq_next(struct seq_file *m, void *v, loff_t *pos)
676 {
677 return NULL;
678 }
679
680 static int lockres_seq_show(struct seq_file *s, void *v)
681 {
682 struct debug_lockres *dl = (struct debug_lockres *)v;
683
684 seq_printf(s, "%s", dl->dl_buf);
685
686 return 0;
687 }
688
689 static struct seq_operations debug_lockres_ops = {
690 .start = lockres_seq_start,
691 .stop = lockres_seq_stop,
692 .next = lockres_seq_next,
693 .show = lockres_seq_show,
694 };
695
696 static int debug_lockres_open(struct inode *inode, struct file *file)
697 {
698 struct dlm_ctxt *dlm = inode->i_private;
699 int ret = -ENOMEM;
700 struct seq_file *seq;
701 struct debug_lockres *dl = NULL;
702
703 dl = kzalloc(sizeof(struct debug_lockres), GFP_KERNEL);
704 if (!dl) {
705 mlog_errno(ret);
706 goto bail;
707 }
708
709 dl->dl_len = PAGE_SIZE;
710 dl->dl_buf = kmalloc(dl->dl_len, GFP_KERNEL);
711 if (!dl->dl_buf) {
712 mlog_errno(ret);
713 goto bail;
714 }
715
716 ret = seq_open(file, &debug_lockres_ops);
717 if (ret) {
718 mlog_errno(ret);
719 goto bail;
720 }
721
722 seq = (struct seq_file *) file->private_data;
723 seq->private = dl;
724
725 dlm_grab(dlm);
726 dl->dl_ctxt = dlm;
727
728 return 0;
729 bail:
730 if (dl)
731 kfree(dl->dl_buf);
732 kfree(dl);
733 return ret;
734 }
735
736 static int debug_lockres_release(struct inode *inode, struct file *file)
737 {
738 struct seq_file *seq = (struct seq_file *)file->private_data;
739 struct debug_lockres *dl = (struct debug_lockres *)seq->private;
740
741 if (dl->dl_res)
742 dlm_lockres_put(dl->dl_res);
743 dlm_put(dl->dl_ctxt);
744 kfree(dl->dl_buf);
745 return seq_release_private(inode, file);
746 }
747
748 static struct file_operations debug_lockres_fops = {
749 .open = debug_lockres_open,
750 .release = debug_lockres_release,
751 .read = seq_read,
752 .llseek = seq_lseek,
753 };
754 /* end - debug lockres funcs */
755
756 /* begin - debug state funcs */
757 static int debug_state_print(struct dlm_ctxt *dlm, struct debug_buffer *db)
758 {
759 int out = 0;
760 struct dlm_reco_node_data *node;
761 char *state;
762 int lres, rres, ures, tres;
763
764 lres = atomic_read(&dlm->local_resources);
765 rres = atomic_read(&dlm->remote_resources);
766 ures = atomic_read(&dlm->unknown_resources);
767 tres = lres + rres + ures;
768
769 spin_lock(&dlm->spinlock);
770
771 switch (dlm->dlm_state) {
772 case DLM_CTXT_NEW:
773 state = "NEW"; break;
774 case DLM_CTXT_JOINED:
775 state = "JOINED"; break;
776 case DLM_CTXT_IN_SHUTDOWN:
777 state = "SHUTDOWN"; break;
778 case DLM_CTXT_LEAVING:
779 state = "LEAVING"; break;
780 default:
781 state = "UNKNOWN"; break;
782 }
783
784 /* Domain: xxxxxxxxxx Key: 0xdfbac769 */
785 out += snprintf(db->buf + out, db->len - out,
786 "Domain: %s Key: 0x%08x\n", dlm->name, dlm->key);
787
788 /* Thread Pid: xxx Node: xxx State: xxxxx */
789 out += snprintf(db->buf + out, db->len - out,
790 "Thread Pid: %d Node: %d State: %s\n",
791 dlm->dlm_thread_task->pid, dlm->node_num, state);
792
793 /* Number of Joins: xxx Joining Node: xxx */
794 out += snprintf(db->buf + out, db->len - out,
795 "Number of Joins: %d Joining Node: %d\n",
796 dlm->num_joins, dlm->joining_node);
797
798 /* Domain Map: xx xx xx */
799 out += snprintf(db->buf + out, db->len - out, "Domain Map: ");
800 out += stringify_nodemap(dlm->domain_map, O2NM_MAX_NODES,
801 db->buf + out, db->len - out);
802 out += snprintf(db->buf + out, db->len - out, "\n");
803
804 /* Live Map: xx xx xx */
805 out += snprintf(db->buf + out, db->len - out, "Live Map: ");
806 out += stringify_nodemap(dlm->live_nodes_map, O2NM_MAX_NODES,
807 db->buf + out, db->len - out);
808 out += snprintf(db->buf + out, db->len - out, "\n");
809
810 /* Mastered Resources Total: xxx Locally: xxx Remotely: ... */
811 out += snprintf(db->buf + out, db->len - out,
812 "Mastered Resources Total: %d Locally: %d "
813 "Remotely: %d Unknown: %d\n",
814 tres, lres, rres, ures);
815
816 /* Lists: Dirty=Empty Purge=InUse PendingASTs=Empty ... */
817 out += snprintf(db->buf + out, db->len - out,
818 "Lists: Dirty=%s Purge=%s PendingASTs=%s "
819 "PendingBASTs=%s Master=%s\n",
820 (list_empty(&dlm->dirty_list) ? "Empty" : "InUse"),
821 (list_empty(&dlm->purge_list) ? "Empty" : "InUse"),
822 (list_empty(&dlm->pending_asts) ? "Empty" : "InUse"),
823 (list_empty(&dlm->pending_basts) ? "Empty" : "InUse"),
824 (list_empty(&dlm->master_list) ? "Empty" : "InUse"));
825
826 /* Purge Count: xxx Refs: xxx */
827 out += snprintf(db->buf + out, db->len - out,
828 "Purge Count: %d Refs: %d\n", dlm->purge_count,
829 atomic_read(&dlm->dlm_refs.refcount));
830
831 /* Dead Node: xxx */
832 out += snprintf(db->buf + out, db->len - out,
833 "Dead Node: %d\n", dlm->reco.dead_node);
834
835 /* What about DLM_RECO_STATE_FINALIZE? */
836 if (dlm->reco.state == DLM_RECO_STATE_ACTIVE)
837 state = "ACTIVE";
838 else
839 state = "INACTIVE";
840
841 /* Recovery Pid: xxxx Master: xxx State: xxxx */
842 out += snprintf(db->buf + out, db->len - out,
843 "Recovery Pid: %d Master: %d State: %s\n",
844 dlm->dlm_reco_thread_task->pid,
845 dlm->reco.new_master, state);
846
847 /* Recovery Map: xx xx */
848 out += snprintf(db->buf + out, db->len - out, "Recovery Map: ");
849 out += stringify_nodemap(dlm->recovery_map, O2NM_MAX_NODES,
850 db->buf + out, db->len - out);
851 out += snprintf(db->buf + out, db->len - out, "\n");
852
853 /* Recovery Node State: */
854 out += snprintf(db->buf + out, db->len - out, "Recovery Node State:\n");
855 list_for_each_entry(node, &dlm->reco.node_data, list) {
856 switch (node->state) {
857 case DLM_RECO_NODE_DATA_INIT:
858 state = "INIT";
859 break;
860 case DLM_RECO_NODE_DATA_REQUESTING:
861 state = "REQUESTING";
862 break;
863 case DLM_RECO_NODE_DATA_DEAD:
864 state = "DEAD";
865 break;
866 case DLM_RECO_NODE_DATA_RECEIVING:
867 state = "RECEIVING";
868 break;
869 case DLM_RECO_NODE_DATA_REQUESTED:
870 state = "REQUESTED";
871 break;
872 case DLM_RECO_NODE_DATA_DONE:
873 state = "DONE";
874 break;
875 case DLM_RECO_NODE_DATA_FINALIZE_SENT:
876 state = "FINALIZE-SENT";
877 break;
878 default:
879 state = "BAD";
880 break;
881 }
882 out += snprintf(db->buf + out, db->len - out, "\t%u - %s\n",
883 node->node_num, state);
884 }
885
886 spin_unlock(&dlm->spinlock);
887
888 return out;
889 }
890
891 static int debug_state_open(struct inode *inode, struct file *file)
892 {
893 struct dlm_ctxt *dlm = inode->i_private;
894 struct debug_buffer *db = NULL;
895
896 db = debug_buffer_allocate();
897 if (!db)
898 goto bail;
899
900 db->len = debug_state_print(dlm, db);
901
902 file->private_data = db;
903
904 return 0;
905 bail:
906 return -ENOMEM;
907 }
908
909 static struct file_operations debug_state_fops = {
910 .open = debug_state_open,
911 .release = debug_buffer_release,
912 .read = debug_buffer_read,
913 .llseek = debug_buffer_llseek,
914 };
915 /* end - debug state funcs */
916
917 /* files in subroot */
918 int dlm_debug_init(struct dlm_ctxt *dlm)
919 {
920 struct dlm_debug_ctxt *dc = dlm->dlm_debug_ctxt;
921
922 /* for dumping dlm_ctxt */
923 dc->debug_state_dentry = debugfs_create_file(DLM_DEBUGFS_DLM_STATE,
924 S_IFREG|S_IRUSR,
925 dlm->dlm_debugfs_subroot,
926 dlm, &debug_state_fops);
927 if (!dc->debug_state_dentry) {
928 mlog_errno(-ENOMEM);
929 goto bail;
930 }
931
932 /* for dumping lockres */
933 dc->debug_lockres_dentry =
934 debugfs_create_file(DLM_DEBUGFS_LOCKING_STATE,
935 S_IFREG|S_IRUSR,
936 dlm->dlm_debugfs_subroot,
937 dlm, &debug_lockres_fops);
938 if (!dc->debug_lockres_dentry) {
939 mlog_errno(-ENOMEM);
940 goto bail;
941 }
942
943 /* for dumping mles */
944 dc->debug_mle_dentry = debugfs_create_file(DLM_DEBUGFS_MLE_STATE,
945 S_IFREG|S_IRUSR,
946 dlm->dlm_debugfs_subroot,
947 dlm, &debug_mle_fops);
948 if (!dc->debug_mle_dentry) {
949 mlog_errno(-ENOMEM);
950 goto bail;
951 }
952
953 /* for dumping lockres on the purge list */
954 dc->debug_purgelist_dentry =
955 debugfs_create_file(DLM_DEBUGFS_PURGE_LIST,
956 S_IFREG|S_IRUSR,
957 dlm->dlm_debugfs_subroot,
958 dlm, &debug_purgelist_fops);
959 if (!dc->debug_purgelist_dentry) {
960 mlog_errno(-ENOMEM);
961 goto bail;
962 }
963
964 dlm_debug_get(dc);
965 return 0;
966
967 bail:
968 dlm_debug_shutdown(dlm);
969 return -ENOMEM;
970 }
971
972 void dlm_debug_shutdown(struct dlm_ctxt *dlm)
973 {
974 struct dlm_debug_ctxt *dc = dlm->dlm_debug_ctxt;
975
976 if (dc) {
977 if (dc->debug_purgelist_dentry)
978 debugfs_remove(dc->debug_purgelist_dentry);
979 if (dc->debug_mle_dentry)
980 debugfs_remove(dc->debug_mle_dentry);
981 if (dc->debug_lockres_dentry)
982 debugfs_remove(dc->debug_lockres_dentry);
983 if (dc->debug_state_dentry)
984 debugfs_remove(dc->debug_state_dentry);
985 dlm_debug_put(dc);
986 }
987 }
988
989 /* subroot - domain dir */
990 int dlm_create_debugfs_subroot(struct dlm_ctxt *dlm)
991 {
992 dlm->dlm_debugfs_subroot = debugfs_create_dir(dlm->name,
993 dlm_debugfs_root);
994 if (!dlm->dlm_debugfs_subroot) {
995 mlog_errno(-ENOMEM);
996 goto bail;
997 }
998
999 dlm->dlm_debug_ctxt = kzalloc(sizeof(struct dlm_debug_ctxt),
1000 GFP_KERNEL);
1001 if (!dlm->dlm_debug_ctxt) {
1002 mlog_errno(-ENOMEM);
1003 goto bail;
1004 }
1005 kref_init(&dlm->dlm_debug_ctxt->debug_refcnt);
1006
1007 return 0;
1008 bail:
1009 dlm_destroy_debugfs_subroot(dlm);
1010 return -ENOMEM;
1011 }
1012
1013 void dlm_destroy_debugfs_subroot(struct dlm_ctxt *dlm)
1014 {
1015 if (dlm->dlm_debugfs_subroot)
1016 debugfs_remove(dlm->dlm_debugfs_subroot);
1017 }
1018
1019 /* debugfs root */
1020 int dlm_create_debugfs_root(void)
1021 {
1022 dlm_debugfs_root = debugfs_create_dir(DLM_DEBUGFS_DIR, NULL);
1023 if (!dlm_debugfs_root) {
1024 mlog_errno(-ENOMEM);
1025 return -ENOMEM;
1026 }
1027 return 0;
1028 }
1029
1030 void dlm_destroy_debugfs_root(void)
1031 {
1032 if (dlm_debugfs_root)
1033 debugfs_remove(dlm_debugfs_root);
1034 }
1035 #endif /* CONFIG_DEBUG_FS */
ubuntu-zesty-kernel mirror