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6714d8e8 KH |
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 | * | |
c834cdb1 | 8 | * Copyright (C) 2004, 2008 Oracle. All rights reserved. |
6714d8e8 KH |
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> | |
6325b4a2 | 33 | #include <linux/debugfs.h> |
6714d8e8 KH |
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" | |
6714d8e8 | 41 | #include "dlmdomain.h" |
6325b4a2 | 42 | #include "dlmdebug.h" |
6714d8e8 KH |
43 | |
44 | #define MLOG_MASK_PREFIX ML_DLM | |
45 | #include "cluster/masklog.h" | |
46 | ||
95642e56 AB |
47 | static int stringify_lockname(const char *lockname, int locklen, char *buf, |
48 | int len); | |
c834cdb1 | 49 | |
6714d8e8 KH |
50 | void dlm_print_one_lock_resource(struct dlm_lock_resource *res) |
51 | { | |
6714d8e8 KH |
52 | spin_lock(&res->spinlock); |
53 | __dlm_print_one_lock_resource(res); | |
54 | spin_unlock(&res->spinlock); | |
55 | } | |
56 | ||
ba2bf218 KH |
57 | static void dlm_print_lockres_refmap(struct dlm_lock_resource *res) |
58 | { | |
59 | int bit; | |
60 | assert_spin_locked(&res->spinlock); | |
61 | ||
8f50eb97 | 62 | printk(" refmap nodes: [ "); |
ba2bf218 KH |
63 | bit = 0; |
64 | while (1) { | |
65 | bit = find_next_bit(res->refmap, O2NM_MAX_NODES, bit); | |
66 | if (bit >= O2NM_MAX_NODES) | |
67 | break; | |
8f50eb97 | 68 | printk("%u ", bit); |
ba2bf218 KH |
69 | bit++; |
70 | } | |
8f50eb97 | 71 | printk("], inflight=%u\n", res->inflight_locks); |
c834cdb1 SM |
72 | } |
73 | ||
74 | static void __dlm_print_lock(struct dlm_lock *lock) | |
75 | { | |
76 | spin_lock(&lock->spinlock); | |
77 | ||
8f50eb97 | 78 | printk(" type=%d, conv=%d, node=%u, cookie=%u:%llu, " |
c834cdb1 SM |
79 | "ref=%u, ast=(empty=%c,pend=%c), bast=(empty=%c,pend=%c), " |
80 | "pending=(conv=%c,lock=%c,cancel=%c,unlock=%c)\n", | |
81 | lock->ml.type, lock->ml.convert_type, lock->ml.node, | |
82 | dlm_get_lock_cookie_node(be64_to_cpu(lock->ml.cookie)), | |
83 | dlm_get_lock_cookie_seq(be64_to_cpu(lock->ml.cookie)), | |
84 | atomic_read(&lock->lock_refs.refcount), | |
85 | (list_empty(&lock->ast_list) ? 'y' : 'n'), | |
86 | (lock->ast_pending ? 'y' : 'n'), | |
87 | (list_empty(&lock->bast_list) ? 'y' : 'n'), | |
88 | (lock->bast_pending ? 'y' : 'n'), | |
89 | (lock->convert_pending ? 'y' : 'n'), | |
90 | (lock->lock_pending ? 'y' : 'n'), | |
91 | (lock->cancel_pending ? 'y' : 'n'), | |
92 | (lock->unlock_pending ? 'y' : 'n')); | |
93 | ||
94 | spin_unlock(&lock->spinlock); | |
ba2bf218 KH |
95 | } |
96 | ||
6714d8e8 KH |
97 | void __dlm_print_one_lock_resource(struct dlm_lock_resource *res) |
98 | { | |
99 | struct list_head *iter2; | |
100 | struct dlm_lock *lock; | |
c834cdb1 | 101 | char buf[DLM_LOCKID_NAME_MAX]; |
6714d8e8 KH |
102 | |
103 | assert_spin_locked(&res->spinlock); | |
104 | ||
c834cdb1 SM |
105 | stringify_lockname(res->lockname.name, res->lockname.len, |
106 | buf, sizeof(buf) - 1); | |
8f50eb97 | 107 | printk("lockres: %s, owner=%u, state=%u\n", |
c834cdb1 | 108 | buf, res->owner, res->state); |
8f50eb97 | 109 | printk(" last used: %lu, refcnt: %u, on purge list: %s\n", |
c834cdb1 SM |
110 | res->last_used, atomic_read(&res->refs.refcount), |
111 | list_empty(&res->purge) ? "no" : "yes"); | |
8f50eb97 | 112 | printk(" on dirty list: %s, on reco list: %s, " |
c834cdb1 SM |
113 | "migrating pending: %s\n", |
114 | list_empty(&res->dirty) ? "no" : "yes", | |
115 | list_empty(&res->recovering) ? "no" : "yes", | |
116 | res->migration_pending ? "yes" : "no"); | |
8f50eb97 | 117 | printk(" inflight locks: %d, asts reserved: %d\n", |
c834cdb1 | 118 | res->inflight_locks, atomic_read(&res->asts_reserved)); |
ba2bf218 | 119 | dlm_print_lockres_refmap(res); |
8f50eb97 | 120 | printk(" granted queue:\n"); |
6714d8e8 KH |
121 | list_for_each(iter2, &res->granted) { |
122 | lock = list_entry(iter2, struct dlm_lock, list); | |
c834cdb1 | 123 | __dlm_print_lock(lock); |
6714d8e8 | 124 | } |
8f50eb97 | 125 | printk(" converting queue:\n"); |
6714d8e8 KH |
126 | list_for_each(iter2, &res->converting) { |
127 | lock = list_entry(iter2, struct dlm_lock, list); | |
c834cdb1 | 128 | __dlm_print_lock(lock); |
6714d8e8 | 129 | } |
8f50eb97 | 130 | printk(" blocked queue:\n"); |
6714d8e8 KH |
131 | list_for_each(iter2, &res->blocked) { |
132 | lock = list_entry(iter2, struct dlm_lock, list); | |
c834cdb1 | 133 | __dlm_print_lock(lock); |
6714d8e8 KH |
134 | } |
135 | } | |
136 | ||
137 | void dlm_print_one_lock(struct dlm_lock *lockid) | |
138 | { | |
139 | dlm_print_one_lock_resource(lockid->lockres); | |
140 | } | |
141 | EXPORT_SYMBOL_GPL(dlm_print_one_lock); | |
142 | ||
6714d8e8 KH |
143 | static const char *dlm_errnames[] = { |
144 | [DLM_NORMAL] = "DLM_NORMAL", | |
145 | [DLM_GRANTED] = "DLM_GRANTED", | |
146 | [DLM_DENIED] = "DLM_DENIED", | |
147 | [DLM_DENIED_NOLOCKS] = "DLM_DENIED_NOLOCKS", | |
148 | [DLM_WORKING] = "DLM_WORKING", | |
149 | [DLM_BLOCKED] = "DLM_BLOCKED", | |
150 | [DLM_BLOCKED_ORPHAN] = "DLM_BLOCKED_ORPHAN", | |
151 | [DLM_DENIED_GRACE_PERIOD] = "DLM_DENIED_GRACE_PERIOD", | |
152 | [DLM_SYSERR] = "DLM_SYSERR", | |
153 | [DLM_NOSUPPORT] = "DLM_NOSUPPORT", | |
154 | [DLM_CANCELGRANT] = "DLM_CANCELGRANT", | |
155 | [DLM_IVLOCKID] = "DLM_IVLOCKID", | |
156 | [DLM_SYNC] = "DLM_SYNC", | |
157 | [DLM_BADTYPE] = "DLM_BADTYPE", | |
158 | [DLM_BADRESOURCE] = "DLM_BADRESOURCE", | |
159 | [DLM_MAXHANDLES] = "DLM_MAXHANDLES", | |
160 | [DLM_NOCLINFO] = "DLM_NOCLINFO", | |
161 | [DLM_NOLOCKMGR] = "DLM_NOLOCKMGR", | |
162 | [DLM_NOPURGED] = "DLM_NOPURGED", | |
163 | [DLM_BADARGS] = "DLM_BADARGS", | |
164 | [DLM_VOID] = "DLM_VOID", | |
165 | [DLM_NOTQUEUED] = "DLM_NOTQUEUED", | |
166 | [DLM_IVBUFLEN] = "DLM_IVBUFLEN", | |
167 | [DLM_CVTUNGRANT] = "DLM_CVTUNGRANT", | |
168 | [DLM_BADPARAM] = "DLM_BADPARAM", | |
169 | [DLM_VALNOTVALID] = "DLM_VALNOTVALID", | |
170 | [DLM_REJECTED] = "DLM_REJECTED", | |
171 | [DLM_ABORT] = "DLM_ABORT", | |
172 | [DLM_CANCEL] = "DLM_CANCEL", | |
173 | [DLM_IVRESHANDLE] = "DLM_IVRESHANDLE", | |
174 | [DLM_DEADLOCK] = "DLM_DEADLOCK", | |
175 | [DLM_DENIED_NOASTS] = "DLM_DENIED_NOASTS", | |
176 | [DLM_FORWARD] = "DLM_FORWARD", | |
177 | [DLM_TIMEOUT] = "DLM_TIMEOUT", | |
178 | [DLM_IVGROUPID] = "DLM_IVGROUPID", | |
179 | [DLM_VERS_CONFLICT] = "DLM_VERS_CONFLICT", | |
180 | [DLM_BAD_DEVICE_PATH] = "DLM_BAD_DEVICE_PATH", | |
181 | [DLM_NO_DEVICE_PERMISSION] = "DLM_NO_DEVICE_PERMISSION", | |
182 | [DLM_NO_CONTROL_DEVICE ] = "DLM_NO_CONTROL_DEVICE ", | |
183 | [DLM_RECOVERING] = "DLM_RECOVERING", | |
184 | [DLM_MIGRATING] = "DLM_MIGRATING", | |
185 | [DLM_MAXSTATS] = "DLM_MAXSTATS", | |
186 | }; | |
187 | ||
188 | static const char *dlm_errmsgs[] = { | |
189 | [DLM_NORMAL] = "request in progress", | |
190 | [DLM_GRANTED] = "request granted", | |
191 | [DLM_DENIED] = "request denied", | |
192 | [DLM_DENIED_NOLOCKS] = "request denied, out of system resources", | |
193 | [DLM_WORKING] = "async request in progress", | |
194 | [DLM_BLOCKED] = "lock request blocked", | |
195 | [DLM_BLOCKED_ORPHAN] = "lock request blocked by a orphan lock", | |
196 | [DLM_DENIED_GRACE_PERIOD] = "topological change in progress", | |
197 | [DLM_SYSERR] = "system error", | |
198 | [DLM_NOSUPPORT] = "unsupported", | |
199 | [DLM_CANCELGRANT] = "can't cancel convert: already granted", | |
200 | [DLM_IVLOCKID] = "bad lockid", | |
201 | [DLM_SYNC] = "synchronous request granted", | |
202 | [DLM_BADTYPE] = "bad resource type", | |
203 | [DLM_BADRESOURCE] = "bad resource handle", | |
204 | [DLM_MAXHANDLES] = "no more resource handles", | |
205 | [DLM_NOCLINFO] = "can't contact cluster manager", | |
206 | [DLM_NOLOCKMGR] = "can't contact lock manager", | |
207 | [DLM_NOPURGED] = "can't contact purge daemon", | |
208 | [DLM_BADARGS] = "bad api args", | |
209 | [DLM_VOID] = "no status", | |
210 | [DLM_NOTQUEUED] = "NOQUEUE was specified and request failed", | |
211 | [DLM_IVBUFLEN] = "invalid resource name length", | |
212 | [DLM_CVTUNGRANT] = "attempted to convert ungranted lock", | |
213 | [DLM_BADPARAM] = "invalid lock mode specified", | |
214 | [DLM_VALNOTVALID] = "value block has been invalidated", | |
215 | [DLM_REJECTED] = "request rejected, unrecognized client", | |
216 | [DLM_ABORT] = "blocked lock request cancelled", | |
217 | [DLM_CANCEL] = "conversion request cancelled", | |
218 | [DLM_IVRESHANDLE] = "invalid resource handle", | |
219 | [DLM_DEADLOCK] = "deadlock recovery refused this request", | |
220 | [DLM_DENIED_NOASTS] = "failed to allocate AST", | |
221 | [DLM_FORWARD] = "request must wait for primary's response", | |
222 | [DLM_TIMEOUT] = "timeout value for lock has expired", | |
223 | [DLM_IVGROUPID] = "invalid group specification", | |
224 | [DLM_VERS_CONFLICT] = "version conflicts prevent request handling", | |
225 | [DLM_BAD_DEVICE_PATH] = "Locks device does not exist or path wrong", | |
226 | [DLM_NO_DEVICE_PERMISSION] = "Client has insufficient perms for device", | |
227 | [DLM_NO_CONTROL_DEVICE] = "Cannot set options on opened device ", | |
228 | [DLM_RECOVERING] = "lock resource being recovered", | |
229 | [DLM_MIGRATING] = "lock resource being migrated", | |
230 | [DLM_MAXSTATS] = "invalid error number", | |
231 | }; | |
232 | ||
233 | const char *dlm_errmsg(enum dlm_status err) | |
234 | { | |
235 | if (err >= DLM_MAXSTATS || err < 0) | |
236 | return dlm_errmsgs[DLM_MAXSTATS]; | |
237 | return dlm_errmsgs[err]; | |
238 | } | |
239 | EXPORT_SYMBOL_GPL(dlm_errmsg); | |
240 | ||
241 | const char *dlm_errname(enum dlm_status err) | |
242 | { | |
243 | if (err >= DLM_MAXSTATS || err < 0) | |
244 | return dlm_errnames[DLM_MAXSTATS]; | |
245 | return dlm_errnames[err]; | |
246 | } | |
247 | EXPORT_SYMBOL_GPL(dlm_errname); | |
6325b4a2 | 248 | |
4e3d24ed SM |
249 | /* NOTE: This function converts a lockname into a string. It uses knowledge |
250 | * of the format of the lockname that should be outside the purview of the dlm. | |
251 | * We are adding only to make dlm debugging slightly easier. | |
252 | * | |
253 | * For more on lockname formats, please refer to dlmglue.c and ocfs2_lockid.h. | |
254 | */ | |
95642e56 AB |
255 | static int stringify_lockname(const char *lockname, int locklen, char *buf, |
256 | int len) | |
4e3d24ed SM |
257 | { |
258 | int out = 0; | |
259 | __be64 inode_blkno_be; | |
260 | ||
261 | #define OCFS2_DENTRY_LOCK_INO_START 18 | |
262 | if (*lockname == 'N') { | |
263 | memcpy((__be64 *)&inode_blkno_be, | |
264 | (char *)&lockname[OCFS2_DENTRY_LOCK_INO_START], | |
265 | sizeof(__be64)); | |
266 | out += snprintf(buf + out, len - out, "%.*s%08x", | |
267 | OCFS2_DENTRY_LOCK_INO_START - 1, lockname, | |
268 | (unsigned int)be64_to_cpu(inode_blkno_be)); | |
269 | } else | |
270 | out += snprintf(buf + out, len - out, "%.*s", | |
271 | locklen, lockname); | |
272 | return out; | |
273 | } | |
274 | ||
e5a0334c SM |
275 | static int stringify_nodemap(unsigned long *nodemap, int maxnodes, |
276 | char *buf, int len) | |
277 | { | |
278 | int out = 0; | |
279 | int i = -1; | |
280 | ||
281 | while ((i = find_next_bit(nodemap, maxnodes, i + 1)) < maxnodes) | |
282 | out += snprintf(buf + out, len - out, "%d ", i); | |
283 | ||
284 | return out; | |
285 | } | |
286 | ||
287 | static int dump_mle(struct dlm_master_list_entry *mle, char *buf, int len) | |
288 | { | |
289 | int out = 0; | |
e5a0334c SM |
290 | char *mle_type; |
291 | ||
e5a0334c SM |
292 | if (mle->type == DLM_MLE_BLOCK) |
293 | mle_type = "BLK"; | |
294 | else if (mle->type == DLM_MLE_MASTER) | |
295 | mle_type = "MAS"; | |
296 | else | |
297 | mle_type = "MIG"; | |
298 | ||
7141514b | 299 | out += stringify_lockname(mle->mname, mle->mnamelen, buf + out, len - out); |
e5a0334c SM |
300 | out += snprintf(buf + out, len - out, |
301 | "\t%3s\tmas=%3u\tnew=%3u\tevt=%1d\tuse=%1d\tref=%3d\n", | |
302 | mle_type, mle->master, mle->new_master, | |
303 | !list_empty(&mle->hb_events), | |
304 | !!mle->inuse, | |
305 | atomic_read(&mle->mle_refs.refcount)); | |
306 | ||
307 | out += snprintf(buf + out, len - out, "Maybe="); | |
308 | out += stringify_nodemap(mle->maybe_map, O2NM_MAX_NODES, | |
309 | buf + out, len - out); | |
310 | out += snprintf(buf + out, len - out, "\n"); | |
311 | ||
312 | out += snprintf(buf + out, len - out, "Vote="); | |
313 | out += stringify_nodemap(mle->vote_map, O2NM_MAX_NODES, | |
314 | buf + out, len - out); | |
315 | out += snprintf(buf + out, len - out, "\n"); | |
316 | ||
317 | out += snprintf(buf + out, len - out, "Response="); | |
318 | out += stringify_nodemap(mle->response_map, O2NM_MAX_NODES, | |
319 | buf + out, len - out); | |
320 | out += snprintf(buf + out, len - out, "\n"); | |
321 | ||
322 | out += snprintf(buf + out, len - out, "Node="); | |
323 | out += stringify_nodemap(mle->node_map, O2NM_MAX_NODES, | |
324 | buf + out, len - out); | |
325 | out += snprintf(buf + out, len - out, "\n"); | |
326 | ||
327 | out += snprintf(buf + out, len - out, "\n"); | |
328 | ||
329 | return out; | |
330 | } | |
331 | ||
332 | void dlm_print_one_mle(struct dlm_master_list_entry *mle) | |
333 | { | |
334 | char *buf; | |
335 | ||
336 | buf = (char *) get_zeroed_page(GFP_NOFS); | |
337 | if (buf) { | |
338 | dump_mle(mle, buf, PAGE_SIZE - 1); | |
339 | free_page((unsigned long)buf); | |
340 | } | |
341 | } | |
342 | ||
343 | #ifdef CONFIG_DEBUG_FS | |
344 | ||
345 | static struct dentry *dlm_debugfs_root = NULL; | |
346 | ||
6325b4a2 | 347 | #define DLM_DEBUGFS_DIR "o2dlm" |
007dce53 | 348 | #define DLM_DEBUGFS_DLM_STATE "dlm_state" |
4e3d24ed | 349 | #define DLM_DEBUGFS_LOCKING_STATE "locking_state" |
d0129ace | 350 | #define DLM_DEBUGFS_MLE_STATE "mle_state" |
7209300a | 351 | #define DLM_DEBUGFS_PURGE_LIST "purge_list" |
007dce53 SM |
352 | |
353 | /* begin - utils funcs */ | |
354 | static void dlm_debug_free(struct kref *kref) | |
355 | { | |
356 | struct dlm_debug_ctxt *dc; | |
357 | ||
358 | dc = container_of(kref, struct dlm_debug_ctxt, debug_refcnt); | |
359 | ||
360 | kfree(dc); | |
361 | } | |
362 | ||
95642e56 | 363 | static void dlm_debug_put(struct dlm_debug_ctxt *dc) |
007dce53 SM |
364 | { |
365 | if (dc) | |
366 | kref_put(&dc->debug_refcnt, dlm_debug_free); | |
367 | } | |
368 | ||
369 | static void dlm_debug_get(struct dlm_debug_ctxt *dc) | |
370 | { | |
371 | kref_get(&dc->debug_refcnt); | |
372 | } | |
373 | ||
007dce53 SM |
374 | static struct debug_buffer *debug_buffer_allocate(void) |
375 | { | |
376 | struct debug_buffer *db = NULL; | |
377 | ||
378 | db = kzalloc(sizeof(struct debug_buffer), GFP_KERNEL); | |
379 | if (!db) | |
380 | goto bail; | |
381 | ||
382 | db->len = PAGE_SIZE; | |
383 | db->buf = kmalloc(db->len, GFP_KERNEL); | |
384 | if (!db->buf) | |
385 | goto bail; | |
386 | ||
387 | return db; | |
388 | bail: | |
389 | kfree(db); | |
390 | return NULL; | |
391 | } | |
392 | ||
393 | static ssize_t debug_buffer_read(struct file *file, char __user *buf, | |
394 | size_t nbytes, loff_t *ppos) | |
395 | { | |
396 | struct debug_buffer *db = file->private_data; | |
397 | ||
398 | return simple_read_from_buffer(buf, nbytes, ppos, db->buf, db->len); | |
399 | } | |
400 | ||
401 | static loff_t debug_buffer_llseek(struct file *file, loff_t off, int whence) | |
402 | { | |
403 | struct debug_buffer *db = file->private_data; | |
404 | loff_t new = -1; | |
405 | ||
406 | switch (whence) { | |
407 | case 0: | |
408 | new = off; | |
409 | break; | |
410 | case 1: | |
411 | new = file->f_pos + off; | |
412 | break; | |
413 | } | |
414 | ||
415 | if (new < 0 || new > db->len) | |
416 | return -EINVAL; | |
417 | ||
418 | return (file->f_pos = new); | |
419 | } | |
420 | ||
421 | static int debug_buffer_release(struct inode *inode, struct file *file) | |
422 | { | |
423 | struct debug_buffer *db = (struct debug_buffer *)file->private_data; | |
424 | ||
425 | if (db) | |
426 | kfree(db->buf); | |
427 | kfree(db); | |
428 | ||
429 | return 0; | |
430 | } | |
431 | /* end - util funcs */ | |
432 | ||
7209300a SM |
433 | /* begin - purge list funcs */ |
434 | static int debug_purgelist_print(struct dlm_ctxt *dlm, struct debug_buffer *db) | |
435 | { | |
436 | struct dlm_lock_resource *res; | |
437 | int out = 0; | |
438 | unsigned long total = 0; | |
439 | ||
440 | out += snprintf(db->buf + out, db->len - out, | |
441 | "Dumping Purgelist for Domain: %s\n", dlm->name); | |
442 | ||
443 | spin_lock(&dlm->spinlock); | |
444 | list_for_each_entry(res, &dlm->purge_list, purge) { | |
445 | ++total; | |
446 | if (db->len - out < 100) | |
447 | continue; | |
448 | spin_lock(&res->spinlock); | |
449 | out += stringify_lockname(res->lockname.name, | |
450 | res->lockname.len, | |
451 | db->buf + out, db->len - out); | |
452 | out += snprintf(db->buf + out, db->len - out, "\t%ld\n", | |
453 | (jiffies - res->last_used)/HZ); | |
454 | spin_unlock(&res->spinlock); | |
455 | } | |
456 | spin_unlock(&dlm->spinlock); | |
457 | ||
458 | out += snprintf(db->buf + out, db->len - out, | |
459 | "Total on list: %ld\n", total); | |
460 | ||
461 | return out; | |
462 | } | |
463 | ||
464 | static int debug_purgelist_open(struct inode *inode, struct file *file) | |
465 | { | |
466 | struct dlm_ctxt *dlm = inode->i_private; | |
467 | struct debug_buffer *db; | |
468 | ||
469 | db = debug_buffer_allocate(); | |
470 | if (!db) | |
471 | goto bail; | |
472 | ||
473 | db->len = debug_purgelist_print(dlm, db); | |
474 | ||
475 | file->private_data = db; | |
476 | ||
477 | return 0; | |
478 | bail: | |
479 | return -ENOMEM; | |
480 | } | |
481 | ||
482 | static struct file_operations debug_purgelist_fops = { | |
483 | .open = debug_purgelist_open, | |
484 | .release = debug_buffer_release, | |
485 | .read = debug_buffer_read, | |
486 | .llseek = debug_buffer_llseek, | |
487 | }; | |
488 | /* end - purge list funcs */ | |
489 | ||
d0129ace | 490 | /* begin - debug mle funcs */ |
d0129ace SM |
491 | static int debug_mle_print(struct dlm_ctxt *dlm, struct debug_buffer *db) |
492 | { | |
493 | struct dlm_master_list_entry *mle; | |
2ed6c750 SM |
494 | struct hlist_head *bucket; |
495 | struct hlist_node *list; | |
496 | int i, out = 0; | |
9405dccf | 497 | unsigned long total = 0, longest = 0, bktcnt; |
d0129ace SM |
498 | |
499 | out += snprintf(db->buf + out, db->len - out, | |
500 | "Dumping MLEs for Domain: %s\n", dlm->name); | |
501 | ||
502 | spin_lock(&dlm->master_lock); | |
2ed6c750 SM |
503 | for (i = 0; i < DLM_HASH_BUCKETS; i++) { |
504 | bucket = dlm_master_hash(dlm, i); | |
505 | hlist_for_each(list, bucket) { | |
506 | mle = hlist_entry(list, struct dlm_master_list_entry, | |
507 | master_hash_node); | |
508 | ++total; | |
9405dccf | 509 | ++bktcnt; |
2ed6c750 SM |
510 | if (db->len - out < 200) |
511 | continue; | |
512 | out += dump_mle(mle, db->buf + out, db->len - out); | |
513 | } | |
9405dccf SM |
514 | longest = max(longest, bktcnt); |
515 | bktcnt = 0; | |
d0129ace SM |
516 | } |
517 | spin_unlock(&dlm->master_lock); | |
518 | ||
519 | out += snprintf(db->buf + out, db->len - out, | |
9405dccf | 520 | "Total: %ld, Longest: %ld\n", total, longest); |
d0129ace SM |
521 | return out; |
522 | } | |
523 | ||
524 | static int debug_mle_open(struct inode *inode, struct file *file) | |
525 | { | |
526 | struct dlm_ctxt *dlm = inode->i_private; | |
527 | struct debug_buffer *db; | |
528 | ||
529 | db = debug_buffer_allocate(); | |
530 | if (!db) | |
531 | goto bail; | |
532 | ||
533 | db->len = debug_mle_print(dlm, db); | |
534 | ||
535 | file->private_data = db; | |
536 | ||
537 | return 0; | |
538 | bail: | |
539 | return -ENOMEM; | |
540 | } | |
541 | ||
542 | static struct file_operations debug_mle_fops = { | |
543 | .open = debug_mle_open, | |
544 | .release = debug_buffer_release, | |
545 | .read = debug_buffer_read, | |
546 | .llseek = debug_buffer_llseek, | |
547 | }; | |
548 | ||
549 | /* end - debug mle funcs */ | |
550 | ||
4e3d24ed SM |
551 | /* begin - debug lockres funcs */ |
552 | static int dump_lock(struct dlm_lock *lock, int list_type, char *buf, int len) | |
553 | { | |
554 | int out; | |
555 | ||
556 | #define DEBUG_LOCK_VERSION 1 | |
557 | spin_lock(&lock->spinlock); | |
558 | out = snprintf(buf, len, "LOCK:%d,%d,%d,%d,%d,%d:%lld,%d,%d,%d,%d,%d," | |
559 | "%d,%d,%d,%d\n", | |
560 | DEBUG_LOCK_VERSION, | |
561 | list_type, lock->ml.type, lock->ml.convert_type, | |
562 | lock->ml.node, | |
563 | dlm_get_lock_cookie_node(be64_to_cpu(lock->ml.cookie)), | |
564 | dlm_get_lock_cookie_seq(be64_to_cpu(lock->ml.cookie)), | |
565 | !list_empty(&lock->ast_list), | |
566 | !list_empty(&lock->bast_list), | |
567 | lock->ast_pending, lock->bast_pending, | |
568 | lock->convert_pending, lock->lock_pending, | |
569 | lock->cancel_pending, lock->unlock_pending, | |
570 | atomic_read(&lock->lock_refs.refcount)); | |
571 | spin_unlock(&lock->spinlock); | |
572 | ||
573 | return out; | |
574 | } | |
575 | ||
576 | static int dump_lockres(struct dlm_lock_resource *res, char *buf, int len) | |
577 | { | |
578 | struct dlm_lock *lock; | |
579 | int i; | |
580 | int out = 0; | |
581 | ||
582 | out += snprintf(buf + out, len - out, "NAME:"); | |
583 | out += stringify_lockname(res->lockname.name, res->lockname.len, | |
584 | buf + out, len - out); | |
585 | out += snprintf(buf + out, len - out, "\n"); | |
586 | ||
587 | #define DEBUG_LRES_VERSION 1 | |
588 | out += snprintf(buf + out, len - out, | |
589 | "LRES:%d,%d,%d,%ld,%d,%d,%d,%d,%d,%d,%d\n", | |
590 | DEBUG_LRES_VERSION, | |
591 | res->owner, res->state, res->last_used, | |
592 | !list_empty(&res->purge), | |
593 | !list_empty(&res->dirty), | |
594 | !list_empty(&res->recovering), | |
595 | res->inflight_locks, res->migration_pending, | |
596 | atomic_read(&res->asts_reserved), | |
597 | atomic_read(&res->refs.refcount)); | |
598 | ||
599 | /* refmap */ | |
600 | out += snprintf(buf + out, len - out, "RMAP:"); | |
601 | out += stringify_nodemap(res->refmap, O2NM_MAX_NODES, | |
602 | buf + out, len - out); | |
603 | out += snprintf(buf + out, len - out, "\n"); | |
604 | ||
605 | /* lvb */ | |
606 | out += snprintf(buf + out, len - out, "LVBX:"); | |
607 | for (i = 0; i < DLM_LVB_LEN; i++) | |
608 | out += snprintf(buf + out, len - out, | |
609 | "%02x", (unsigned char)res->lvb[i]); | |
610 | out += snprintf(buf + out, len - out, "\n"); | |
611 | ||
612 | /* granted */ | |
613 | list_for_each_entry(lock, &res->granted, list) | |
614 | out += dump_lock(lock, 0, buf + out, len - out); | |
615 | ||
616 | /* converting */ | |
617 | list_for_each_entry(lock, &res->converting, list) | |
618 | out += dump_lock(lock, 1, buf + out, len - out); | |
619 | ||
620 | /* blocked */ | |
621 | list_for_each_entry(lock, &res->blocked, list) | |
622 | out += dump_lock(lock, 2, buf + out, len - out); | |
623 | ||
624 | out += snprintf(buf + out, len - out, "\n"); | |
625 | ||
626 | return out; | |
627 | } | |
628 | ||
629 | static void *lockres_seq_start(struct seq_file *m, loff_t *pos) | |
630 | { | |
631 | struct debug_lockres *dl = m->private; | |
632 | struct dlm_ctxt *dlm = dl->dl_ctxt; | |
b0d4f817 | 633 | struct dlm_lock_resource *oldres = dl->dl_res; |
4e3d24ed | 634 | struct dlm_lock_resource *res = NULL; |
b0d4f817 | 635 | struct list_head *track_list; |
4e3d24ed | 636 | |
b0d4f817 SM |
637 | spin_lock(&dlm->track_lock); |
638 | if (oldres) | |
639 | track_list = &oldres->tracking; | |
640 | else | |
641 | track_list = &dlm->tracking_list; | |
4e3d24ed | 642 | |
b0d4f817 SM |
643 | list_for_each_entry(res, track_list, tracking) { |
644 | if (&res->tracking == &dlm->tracking_list) | |
645 | res = NULL; | |
646 | else | |
4e3d24ed | 647 | dlm_lockres_get(res); |
b0d4f817 | 648 | break; |
4e3d24ed | 649 | } |
b0d4f817 | 650 | spin_unlock(&dlm->track_lock); |
4e3d24ed | 651 | |
b0d4f817 SM |
652 | if (oldres) |
653 | dlm_lockres_put(oldres); | |
4e3d24ed | 654 | |
b0d4f817 SM |
655 | dl->dl_res = res; |
656 | ||
657 | if (res) { | |
658 | spin_lock(&res->spinlock); | |
659 | dump_lockres(res, dl->dl_buf, dl->dl_len - 1); | |
660 | spin_unlock(&res->spinlock); | |
661 | } else | |
662 | dl = NULL; | |
4e3d24ed | 663 | |
b0d4f817 | 664 | /* passed to seq_show */ |
4e3d24ed SM |
665 | return dl; |
666 | } | |
667 | ||
668 | static void lockres_seq_stop(struct seq_file *m, void *v) | |
669 | { | |
670 | } | |
671 | ||
672 | static void *lockres_seq_next(struct seq_file *m, void *v, loff_t *pos) | |
673 | { | |
674 | return NULL; | |
675 | } | |
676 | ||
677 | static int lockres_seq_show(struct seq_file *s, void *v) | |
678 | { | |
679 | struct debug_lockres *dl = (struct debug_lockres *)v; | |
680 | ||
681 | seq_printf(s, "%s", dl->dl_buf); | |
682 | ||
683 | return 0; | |
684 | } | |
685 | ||
88e9d34c | 686 | static const struct seq_operations debug_lockres_ops = { |
4e3d24ed SM |
687 | .start = lockres_seq_start, |
688 | .stop = lockres_seq_stop, | |
689 | .next = lockres_seq_next, | |
690 | .show = lockres_seq_show, | |
691 | }; | |
692 | ||
693 | static int debug_lockres_open(struct inode *inode, struct file *file) | |
694 | { | |
695 | struct dlm_ctxt *dlm = inode->i_private; | |
696 | int ret = -ENOMEM; | |
697 | struct seq_file *seq; | |
698 | struct debug_lockres *dl = NULL; | |
699 | ||
700 | dl = kzalloc(sizeof(struct debug_lockres), GFP_KERNEL); | |
701 | if (!dl) { | |
702 | mlog_errno(ret); | |
703 | goto bail; | |
704 | } | |
705 | ||
706 | dl->dl_len = PAGE_SIZE; | |
707 | dl->dl_buf = kmalloc(dl->dl_len, GFP_KERNEL); | |
708 | if (!dl->dl_buf) { | |
709 | mlog_errno(ret); | |
710 | goto bail; | |
711 | } | |
712 | ||
713 | ret = seq_open(file, &debug_lockres_ops); | |
714 | if (ret) { | |
715 | mlog_errno(ret); | |
716 | goto bail; | |
717 | } | |
718 | ||
719 | seq = (struct seq_file *) file->private_data; | |
720 | seq->private = dl; | |
721 | ||
722 | dlm_grab(dlm); | |
723 | dl->dl_ctxt = dlm; | |
724 | ||
725 | return 0; | |
726 | bail: | |
727 | if (dl) | |
728 | kfree(dl->dl_buf); | |
729 | kfree(dl); | |
730 | return ret; | |
731 | } | |
732 | ||
733 | static int debug_lockres_release(struct inode *inode, struct file *file) | |
734 | { | |
735 | struct seq_file *seq = (struct seq_file *)file->private_data; | |
736 | struct debug_lockres *dl = (struct debug_lockres *)seq->private; | |
737 | ||
738 | if (dl->dl_res) | |
739 | dlm_lockres_put(dl->dl_res); | |
740 | dlm_put(dl->dl_ctxt); | |
741 | kfree(dl->dl_buf); | |
742 | return seq_release_private(inode, file); | |
743 | } | |
744 | ||
745 | static struct file_operations debug_lockres_fops = { | |
746 | .open = debug_lockres_open, | |
747 | .release = debug_lockres_release, | |
748 | .read = seq_read, | |
749 | .llseek = seq_lseek, | |
750 | }; | |
751 | /* end - debug lockres funcs */ | |
752 | ||
007dce53 SM |
753 | /* begin - debug state funcs */ |
754 | static int debug_state_print(struct dlm_ctxt *dlm, struct debug_buffer *db) | |
755 | { | |
756 | int out = 0; | |
757 | struct dlm_reco_node_data *node; | |
758 | char *state; | |
e64ff146 SM |
759 | int cur_mles = 0, tot_mles = 0; |
760 | int i; | |
007dce53 SM |
761 | |
762 | spin_lock(&dlm->spinlock); | |
763 | ||
764 | switch (dlm->dlm_state) { | |
765 | case DLM_CTXT_NEW: | |
766 | state = "NEW"; break; | |
767 | case DLM_CTXT_JOINED: | |
768 | state = "JOINED"; break; | |
769 | case DLM_CTXT_IN_SHUTDOWN: | |
770 | state = "SHUTDOWN"; break; | |
771 | case DLM_CTXT_LEAVING: | |
772 | state = "LEAVING"; break; | |
773 | default: | |
774 | state = "UNKNOWN"; break; | |
775 | } | |
776 | ||
777 | /* Domain: xxxxxxxxxx Key: 0xdfbac769 */ | |
778 | out += snprintf(db->buf + out, db->len - out, | |
779 | "Domain: %s Key: 0x%08x\n", dlm->name, dlm->key); | |
780 | ||
781 | /* Thread Pid: xxx Node: xxx State: xxxxx */ | |
782 | out += snprintf(db->buf + out, db->len - out, | |
783 | "Thread Pid: %d Node: %d State: %s\n", | |
784 | dlm->dlm_thread_task->pid, dlm->node_num, state); | |
785 | ||
786 | /* Number of Joins: xxx Joining Node: xxx */ | |
787 | out += snprintf(db->buf + out, db->len - out, | |
788 | "Number of Joins: %d Joining Node: %d\n", | |
789 | dlm->num_joins, dlm->joining_node); | |
790 | ||
791 | /* Domain Map: xx xx xx */ | |
792 | out += snprintf(db->buf + out, db->len - out, "Domain Map: "); | |
793 | out += stringify_nodemap(dlm->domain_map, O2NM_MAX_NODES, | |
794 | db->buf + out, db->len - out); | |
795 | out += snprintf(db->buf + out, db->len - out, "\n"); | |
796 | ||
797 | /* Live Map: xx xx xx */ | |
798 | out += snprintf(db->buf + out, db->len - out, "Live Map: "); | |
799 | out += stringify_nodemap(dlm->live_nodes_map, O2NM_MAX_NODES, | |
800 | db->buf + out, db->len - out); | |
801 | out += snprintf(db->buf + out, db->len - out, "\n"); | |
802 | ||
e64ff146 SM |
803 | /* Lock Resources: xxx (xxx) */ |
804 | out += snprintf(db->buf + out, db->len - out, | |
805 | "Lock Resources: %d (%d)\n", | |
806 | atomic_read(&dlm->res_cur_count), | |
807 | atomic_read(&dlm->res_tot_count)); | |
808 | ||
809 | for (i = 0; i < DLM_MLE_NUM_TYPES; ++i) | |
810 | tot_mles += atomic_read(&dlm->mle_tot_count[i]); | |
811 | ||
812 | for (i = 0; i < DLM_MLE_NUM_TYPES; ++i) | |
813 | cur_mles += atomic_read(&dlm->mle_cur_count[i]); | |
814 | ||
815 | /* MLEs: xxx (xxx) */ | |
816 | out += snprintf(db->buf + out, db->len - out, | |
817 | "MLEs: %d (%d)\n", cur_mles, tot_mles); | |
818 | ||
819 | /* Blocking: xxx (xxx) */ | |
820 | out += snprintf(db->buf + out, db->len - out, | |
821 | " Blocking: %d (%d)\n", | |
822 | atomic_read(&dlm->mle_cur_count[DLM_MLE_BLOCK]), | |
823 | atomic_read(&dlm->mle_tot_count[DLM_MLE_BLOCK])); | |
824 | ||
825 | /* Mastery: xxx (xxx) */ | |
826 | out += snprintf(db->buf + out, db->len - out, | |
827 | " Mastery: %d (%d)\n", | |
828 | atomic_read(&dlm->mle_cur_count[DLM_MLE_MASTER]), | |
829 | atomic_read(&dlm->mle_tot_count[DLM_MLE_MASTER])); | |
830 | ||
831 | /* Migration: xxx (xxx) */ | |
832 | out += snprintf(db->buf + out, db->len - out, | |
833 | " Migration: %d (%d)\n", | |
834 | atomic_read(&dlm->mle_cur_count[DLM_MLE_MIGRATION]), | |
835 | atomic_read(&dlm->mle_tot_count[DLM_MLE_MIGRATION])); | |
836 | ||
007dce53 SM |
837 | /* Lists: Dirty=Empty Purge=InUse PendingASTs=Empty ... */ |
838 | out += snprintf(db->buf + out, db->len - out, | |
839 | "Lists: Dirty=%s Purge=%s PendingASTs=%s " | |
2ed6c750 | 840 | "PendingBASTs=%s\n", |
007dce53 SM |
841 | (list_empty(&dlm->dirty_list) ? "Empty" : "InUse"), |
842 | (list_empty(&dlm->purge_list) ? "Empty" : "InUse"), | |
843 | (list_empty(&dlm->pending_asts) ? "Empty" : "InUse"), | |
2ed6c750 | 844 | (list_empty(&dlm->pending_basts) ? "Empty" : "InUse")); |
007dce53 SM |
845 | |
846 | /* Purge Count: xxx Refs: xxx */ | |
847 | out += snprintf(db->buf + out, db->len - out, | |
848 | "Purge Count: %d Refs: %d\n", dlm->purge_count, | |
849 | atomic_read(&dlm->dlm_refs.refcount)); | |
850 | ||
851 | /* Dead Node: xxx */ | |
852 | out += snprintf(db->buf + out, db->len - out, | |
853 | "Dead Node: %d\n", dlm->reco.dead_node); | |
854 | ||
855 | /* What about DLM_RECO_STATE_FINALIZE? */ | |
856 | if (dlm->reco.state == DLM_RECO_STATE_ACTIVE) | |
857 | state = "ACTIVE"; | |
858 | else | |
859 | state = "INACTIVE"; | |
860 | ||
861 | /* Recovery Pid: xxxx Master: xxx State: xxxx */ | |
862 | out += snprintf(db->buf + out, db->len - out, | |
863 | "Recovery Pid: %d Master: %d State: %s\n", | |
864 | dlm->dlm_reco_thread_task->pid, | |
865 | dlm->reco.new_master, state); | |
866 | ||
867 | /* Recovery Map: xx xx */ | |
868 | out += snprintf(db->buf + out, db->len - out, "Recovery Map: "); | |
869 | out += stringify_nodemap(dlm->recovery_map, O2NM_MAX_NODES, | |
870 | db->buf + out, db->len - out); | |
871 | out += snprintf(db->buf + out, db->len - out, "\n"); | |
872 | ||
873 | /* Recovery Node State: */ | |
874 | out += snprintf(db->buf + out, db->len - out, "Recovery Node State:\n"); | |
875 | list_for_each_entry(node, &dlm->reco.node_data, list) { | |
876 | switch (node->state) { | |
877 | case DLM_RECO_NODE_DATA_INIT: | |
878 | state = "INIT"; | |
879 | break; | |
880 | case DLM_RECO_NODE_DATA_REQUESTING: | |
881 | state = "REQUESTING"; | |
882 | break; | |
883 | case DLM_RECO_NODE_DATA_DEAD: | |
884 | state = "DEAD"; | |
885 | break; | |
886 | case DLM_RECO_NODE_DATA_RECEIVING: | |
887 | state = "RECEIVING"; | |
888 | break; | |
889 | case DLM_RECO_NODE_DATA_REQUESTED: | |
890 | state = "REQUESTED"; | |
891 | break; | |
892 | case DLM_RECO_NODE_DATA_DONE: | |
893 | state = "DONE"; | |
894 | break; | |
895 | case DLM_RECO_NODE_DATA_FINALIZE_SENT: | |
896 | state = "FINALIZE-SENT"; | |
897 | break; | |
898 | default: | |
899 | state = "BAD"; | |
900 | break; | |
901 | } | |
902 | out += snprintf(db->buf + out, db->len - out, "\t%u - %s\n", | |
903 | node->node_num, state); | |
904 | } | |
905 | ||
906 | spin_unlock(&dlm->spinlock); | |
907 | ||
908 | return out; | |
909 | } | |
910 | ||
911 | static int debug_state_open(struct inode *inode, struct file *file) | |
912 | { | |
913 | struct dlm_ctxt *dlm = inode->i_private; | |
914 | struct debug_buffer *db = NULL; | |
915 | ||
916 | db = debug_buffer_allocate(); | |
917 | if (!db) | |
918 | goto bail; | |
919 | ||
920 | db->len = debug_state_print(dlm, db); | |
921 | ||
922 | file->private_data = db; | |
923 | ||
924 | return 0; | |
925 | bail: | |
926 | return -ENOMEM; | |
927 | } | |
928 | ||
929 | static struct file_operations debug_state_fops = { | |
930 | .open = debug_state_open, | |
931 | .release = debug_buffer_release, | |
932 | .read = debug_buffer_read, | |
933 | .llseek = debug_buffer_llseek, | |
934 | }; | |
935 | /* end - debug state funcs */ | |
936 | ||
937 | /* files in subroot */ | |
938 | int dlm_debug_init(struct dlm_ctxt *dlm) | |
939 | { | |
940 | struct dlm_debug_ctxt *dc = dlm->dlm_debug_ctxt; | |
941 | ||
942 | /* for dumping dlm_ctxt */ | |
943 | dc->debug_state_dentry = debugfs_create_file(DLM_DEBUGFS_DLM_STATE, | |
944 | S_IFREG|S_IRUSR, | |
945 | dlm->dlm_debugfs_subroot, | |
946 | dlm, &debug_state_fops); | |
947 | if (!dc->debug_state_dentry) { | |
948 | mlog_errno(-ENOMEM); | |
949 | goto bail; | |
950 | } | |
951 | ||
4e3d24ed SM |
952 | /* for dumping lockres */ |
953 | dc->debug_lockres_dentry = | |
954 | debugfs_create_file(DLM_DEBUGFS_LOCKING_STATE, | |
955 | S_IFREG|S_IRUSR, | |
956 | dlm->dlm_debugfs_subroot, | |
957 | dlm, &debug_lockres_fops); | |
958 | if (!dc->debug_lockres_dentry) { | |
959 | mlog_errno(-ENOMEM); | |
960 | goto bail; | |
961 | } | |
962 | ||
d0129ace SM |
963 | /* for dumping mles */ |
964 | dc->debug_mle_dentry = debugfs_create_file(DLM_DEBUGFS_MLE_STATE, | |
965 | S_IFREG|S_IRUSR, | |
966 | dlm->dlm_debugfs_subroot, | |
967 | dlm, &debug_mle_fops); | |
968 | if (!dc->debug_mle_dentry) { | |
969 | mlog_errno(-ENOMEM); | |
970 | goto bail; | |
971 | } | |
972 | ||
7209300a SM |
973 | /* for dumping lockres on the purge list */ |
974 | dc->debug_purgelist_dentry = | |
975 | debugfs_create_file(DLM_DEBUGFS_PURGE_LIST, | |
976 | S_IFREG|S_IRUSR, | |
977 | dlm->dlm_debugfs_subroot, | |
978 | dlm, &debug_purgelist_fops); | |
979 | if (!dc->debug_purgelist_dentry) { | |
980 | mlog_errno(-ENOMEM); | |
981 | goto bail; | |
982 | } | |
983 | ||
007dce53 SM |
984 | dlm_debug_get(dc); |
985 | return 0; | |
986 | ||
987 | bail: | |
988 | dlm_debug_shutdown(dlm); | |
989 | return -ENOMEM; | |
990 | } | |
991 | ||
992 | void dlm_debug_shutdown(struct dlm_ctxt *dlm) | |
993 | { | |
994 | struct dlm_debug_ctxt *dc = dlm->dlm_debug_ctxt; | |
995 | ||
996 | if (dc) { | |
7209300a SM |
997 | if (dc->debug_purgelist_dentry) |
998 | debugfs_remove(dc->debug_purgelist_dentry); | |
d0129ace SM |
999 | if (dc->debug_mle_dentry) |
1000 | debugfs_remove(dc->debug_mle_dentry); | |
4e3d24ed SM |
1001 | if (dc->debug_lockres_dentry) |
1002 | debugfs_remove(dc->debug_lockres_dentry); | |
007dce53 SM |
1003 | if (dc->debug_state_dentry) |
1004 | debugfs_remove(dc->debug_state_dentry); | |
1005 | dlm_debug_put(dc); | |
1006 | } | |
1007 | } | |
6325b4a2 SM |
1008 | |
1009 | /* subroot - domain dir */ | |
1010 | int dlm_create_debugfs_subroot(struct dlm_ctxt *dlm) | |
1011 | { | |
1012 | dlm->dlm_debugfs_subroot = debugfs_create_dir(dlm->name, | |
1013 | dlm_debugfs_root); | |
1014 | if (!dlm->dlm_debugfs_subroot) { | |
1015 | mlog_errno(-ENOMEM); | |
1016 | goto bail; | |
1017 | } | |
1018 | ||
007dce53 SM |
1019 | dlm->dlm_debug_ctxt = kzalloc(sizeof(struct dlm_debug_ctxt), |
1020 | GFP_KERNEL); | |
1021 | if (!dlm->dlm_debug_ctxt) { | |
1022 | mlog_errno(-ENOMEM); | |
1023 | goto bail; | |
1024 | } | |
1025 | kref_init(&dlm->dlm_debug_ctxt->debug_refcnt); | |
1026 | ||
6325b4a2 SM |
1027 | return 0; |
1028 | bail: | |
1029 | dlm_destroy_debugfs_subroot(dlm); | |
1030 | return -ENOMEM; | |
1031 | } | |
1032 | ||
1033 | void dlm_destroy_debugfs_subroot(struct dlm_ctxt *dlm) | |
1034 | { | |
1035 | if (dlm->dlm_debugfs_subroot) | |
1036 | debugfs_remove(dlm->dlm_debugfs_subroot); | |
1037 | } | |
1038 | ||
1039 | /* debugfs root */ | |
1040 | int dlm_create_debugfs_root(void) | |
1041 | { | |
1042 | dlm_debugfs_root = debugfs_create_dir(DLM_DEBUGFS_DIR, NULL); | |
1043 | if (!dlm_debugfs_root) { | |
1044 | mlog_errno(-ENOMEM); | |
1045 | return -ENOMEM; | |
1046 | } | |
1047 | return 0; | |
1048 | } | |
1049 | ||
1050 | void dlm_destroy_debugfs_root(void) | |
1051 | { | |
1052 | if (dlm_debugfs_root) | |
1053 | debugfs_remove(dlm_debugfs_root); | |
1054 | } | |
1055 | #endif /* CONFIG_DEBUG_FS */ |