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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> | |
6714d8e8 KH |
30 | #include <linux/sysctl.h> |
31 | #include <linux/spinlock.h> | |
6325b4a2 | 32 | #include <linux/debugfs.h> |
afeacc8c | 33 | #include <linux/export.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 | { | |
6714d8e8 | 99 | struct dlm_lock *lock; |
c834cdb1 | 100 | char buf[DLM_LOCKID_NAME_MAX]; |
6714d8e8 KH |
101 | |
102 | assert_spin_locked(&res->spinlock); | |
103 | ||
c834cdb1 | 104 | stringify_lockname(res->lockname.name, res->lockname.len, |
86a06aba | 105 | buf, sizeof(buf)); |
8f50eb97 | 106 | printk("lockres: %s, owner=%u, state=%u\n", |
c834cdb1 | 107 | buf, res->owner, res->state); |
8f50eb97 | 108 | printk(" last used: %lu, refcnt: %u, on purge list: %s\n", |
c834cdb1 SM |
109 | res->last_used, atomic_read(&res->refs.refcount), |
110 | list_empty(&res->purge) ? "no" : "yes"); | |
8f50eb97 | 111 | printk(" on dirty list: %s, on reco list: %s, " |
c834cdb1 SM |
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"); | |
8f50eb97 | 116 | printk(" inflight locks: %d, asts reserved: %d\n", |
c834cdb1 | 117 | res->inflight_locks, atomic_read(&res->asts_reserved)); |
ba2bf218 | 118 | dlm_print_lockres_refmap(res); |
8f50eb97 | 119 | printk(" granted queue:\n"); |
df53cd3b | 120 | list_for_each_entry(lock, &res->granted, list) { |
c834cdb1 | 121 | __dlm_print_lock(lock); |
6714d8e8 | 122 | } |
8f50eb97 | 123 | printk(" converting queue:\n"); |
df53cd3b | 124 | list_for_each_entry(lock, &res->converting, list) { |
c834cdb1 | 125 | __dlm_print_lock(lock); |
6714d8e8 | 126 | } |
8f50eb97 | 127 | printk(" blocked queue:\n"); |
df53cd3b | 128 | list_for_each_entry(lock, &res->blocked, list) { |
c834cdb1 | 129 | __dlm_print_lock(lock); |
6714d8e8 KH |
130 | } |
131 | } | |
132 | ||
133 | void dlm_print_one_lock(struct dlm_lock *lockid) | |
134 | { | |
135 | dlm_print_one_lock_resource(lockid->lockres); | |
136 | } | |
137 | EXPORT_SYMBOL_GPL(dlm_print_one_lock); | |
138 | ||
6714d8e8 KH |
139 | static const char *dlm_errnames[] = { |
140 | [DLM_NORMAL] = "DLM_NORMAL", | |
141 | [DLM_GRANTED] = "DLM_GRANTED", | |
142 | [DLM_DENIED] = "DLM_DENIED", | |
143 | [DLM_DENIED_NOLOCKS] = "DLM_DENIED_NOLOCKS", | |
144 | [DLM_WORKING] = "DLM_WORKING", | |
145 | [DLM_BLOCKED] = "DLM_BLOCKED", | |
146 | [DLM_BLOCKED_ORPHAN] = "DLM_BLOCKED_ORPHAN", | |
147 | [DLM_DENIED_GRACE_PERIOD] = "DLM_DENIED_GRACE_PERIOD", | |
148 | [DLM_SYSERR] = "DLM_SYSERR", | |
149 | [DLM_NOSUPPORT] = "DLM_NOSUPPORT", | |
150 | [DLM_CANCELGRANT] = "DLM_CANCELGRANT", | |
151 | [DLM_IVLOCKID] = "DLM_IVLOCKID", | |
152 | [DLM_SYNC] = "DLM_SYNC", | |
153 | [DLM_BADTYPE] = "DLM_BADTYPE", | |
154 | [DLM_BADRESOURCE] = "DLM_BADRESOURCE", | |
155 | [DLM_MAXHANDLES] = "DLM_MAXHANDLES", | |
156 | [DLM_NOCLINFO] = "DLM_NOCLINFO", | |
157 | [DLM_NOLOCKMGR] = "DLM_NOLOCKMGR", | |
158 | [DLM_NOPURGED] = "DLM_NOPURGED", | |
159 | [DLM_BADARGS] = "DLM_BADARGS", | |
160 | [DLM_VOID] = "DLM_VOID", | |
161 | [DLM_NOTQUEUED] = "DLM_NOTQUEUED", | |
162 | [DLM_IVBUFLEN] = "DLM_IVBUFLEN", | |
163 | [DLM_CVTUNGRANT] = "DLM_CVTUNGRANT", | |
164 | [DLM_BADPARAM] = "DLM_BADPARAM", | |
165 | [DLM_VALNOTVALID] = "DLM_VALNOTVALID", | |
166 | [DLM_REJECTED] = "DLM_REJECTED", | |
167 | [DLM_ABORT] = "DLM_ABORT", | |
168 | [DLM_CANCEL] = "DLM_CANCEL", | |
169 | [DLM_IVRESHANDLE] = "DLM_IVRESHANDLE", | |
170 | [DLM_DEADLOCK] = "DLM_DEADLOCK", | |
171 | [DLM_DENIED_NOASTS] = "DLM_DENIED_NOASTS", | |
172 | [DLM_FORWARD] = "DLM_FORWARD", | |
173 | [DLM_TIMEOUT] = "DLM_TIMEOUT", | |
174 | [DLM_IVGROUPID] = "DLM_IVGROUPID", | |
175 | [DLM_VERS_CONFLICT] = "DLM_VERS_CONFLICT", | |
176 | [DLM_BAD_DEVICE_PATH] = "DLM_BAD_DEVICE_PATH", | |
177 | [DLM_NO_DEVICE_PERMISSION] = "DLM_NO_DEVICE_PERMISSION", | |
178 | [DLM_NO_CONTROL_DEVICE ] = "DLM_NO_CONTROL_DEVICE ", | |
179 | [DLM_RECOVERING] = "DLM_RECOVERING", | |
180 | [DLM_MIGRATING] = "DLM_MIGRATING", | |
181 | [DLM_MAXSTATS] = "DLM_MAXSTATS", | |
182 | }; | |
183 | ||
184 | static const char *dlm_errmsgs[] = { | |
185 | [DLM_NORMAL] = "request in progress", | |
186 | [DLM_GRANTED] = "request granted", | |
187 | [DLM_DENIED] = "request denied", | |
188 | [DLM_DENIED_NOLOCKS] = "request denied, out of system resources", | |
189 | [DLM_WORKING] = "async request in progress", | |
190 | [DLM_BLOCKED] = "lock request blocked", | |
191 | [DLM_BLOCKED_ORPHAN] = "lock request blocked by a orphan lock", | |
192 | [DLM_DENIED_GRACE_PERIOD] = "topological change in progress", | |
193 | [DLM_SYSERR] = "system error", | |
194 | [DLM_NOSUPPORT] = "unsupported", | |
195 | [DLM_CANCELGRANT] = "can't cancel convert: already granted", | |
196 | [DLM_IVLOCKID] = "bad lockid", | |
197 | [DLM_SYNC] = "synchronous request granted", | |
198 | [DLM_BADTYPE] = "bad resource type", | |
199 | [DLM_BADRESOURCE] = "bad resource handle", | |
200 | [DLM_MAXHANDLES] = "no more resource handles", | |
201 | [DLM_NOCLINFO] = "can't contact cluster manager", | |
202 | [DLM_NOLOCKMGR] = "can't contact lock manager", | |
203 | [DLM_NOPURGED] = "can't contact purge daemon", | |
204 | [DLM_BADARGS] = "bad api args", | |
205 | [DLM_VOID] = "no status", | |
206 | [DLM_NOTQUEUED] = "NOQUEUE was specified and request failed", | |
207 | [DLM_IVBUFLEN] = "invalid resource name length", | |
208 | [DLM_CVTUNGRANT] = "attempted to convert ungranted lock", | |
209 | [DLM_BADPARAM] = "invalid lock mode specified", | |
210 | [DLM_VALNOTVALID] = "value block has been invalidated", | |
211 | [DLM_REJECTED] = "request rejected, unrecognized client", | |
212 | [DLM_ABORT] = "blocked lock request cancelled", | |
213 | [DLM_CANCEL] = "conversion request cancelled", | |
214 | [DLM_IVRESHANDLE] = "invalid resource handle", | |
215 | [DLM_DEADLOCK] = "deadlock recovery refused this request", | |
216 | [DLM_DENIED_NOASTS] = "failed to allocate AST", | |
217 | [DLM_FORWARD] = "request must wait for primary's response", | |
218 | [DLM_TIMEOUT] = "timeout value for lock has expired", | |
219 | [DLM_IVGROUPID] = "invalid group specification", | |
220 | [DLM_VERS_CONFLICT] = "version conflicts prevent request handling", | |
221 | [DLM_BAD_DEVICE_PATH] = "Locks device does not exist or path wrong", | |
222 | [DLM_NO_DEVICE_PERMISSION] = "Client has insufficient perms for device", | |
223 | [DLM_NO_CONTROL_DEVICE] = "Cannot set options on opened device ", | |
224 | [DLM_RECOVERING] = "lock resource being recovered", | |
225 | [DLM_MIGRATING] = "lock resource being migrated", | |
226 | [DLM_MAXSTATS] = "invalid error number", | |
227 | }; | |
228 | ||
229 | const char *dlm_errmsg(enum dlm_status err) | |
230 | { | |
231 | if (err >= DLM_MAXSTATS || err < 0) | |
232 | return dlm_errmsgs[DLM_MAXSTATS]; | |
233 | return dlm_errmsgs[err]; | |
234 | } | |
235 | EXPORT_SYMBOL_GPL(dlm_errmsg); | |
236 | ||
237 | const char *dlm_errname(enum dlm_status err) | |
238 | { | |
239 | if (err >= DLM_MAXSTATS || err < 0) | |
240 | return dlm_errnames[DLM_MAXSTATS]; | |
241 | return dlm_errnames[err]; | |
242 | } | |
243 | EXPORT_SYMBOL_GPL(dlm_errname); | |
6325b4a2 | 244 | |
4e3d24ed SM |
245 | /* NOTE: This function converts a lockname into a string. It uses knowledge |
246 | * of the format of the lockname that should be outside the purview of the dlm. | |
247 | * We are adding only to make dlm debugging slightly easier. | |
248 | * | |
249 | * For more on lockname formats, please refer to dlmglue.c and ocfs2_lockid.h. | |
250 | */ | |
95642e56 AB |
251 | static int stringify_lockname(const char *lockname, int locklen, char *buf, |
252 | int len) | |
4e3d24ed SM |
253 | { |
254 | int out = 0; | |
255 | __be64 inode_blkno_be; | |
256 | ||
257 | #define OCFS2_DENTRY_LOCK_INO_START 18 | |
258 | if (*lockname == 'N') { | |
259 | memcpy((__be64 *)&inode_blkno_be, | |
260 | (char *)&lockname[OCFS2_DENTRY_LOCK_INO_START], | |
261 | sizeof(__be64)); | |
262 | out += snprintf(buf + out, len - out, "%.*s%08x", | |
263 | OCFS2_DENTRY_LOCK_INO_START - 1, lockname, | |
264 | (unsigned int)be64_to_cpu(inode_blkno_be)); | |
265 | } else | |
266 | out += snprintf(buf + out, len - out, "%.*s", | |
267 | locklen, lockname); | |
268 | return out; | |
269 | } | |
270 | ||
e5a0334c SM |
271 | static int stringify_nodemap(unsigned long *nodemap, int maxnodes, |
272 | char *buf, int len) | |
273 | { | |
274 | int out = 0; | |
275 | int i = -1; | |
276 | ||
277 | while ((i = find_next_bit(nodemap, maxnodes, i + 1)) < maxnodes) | |
278 | out += snprintf(buf + out, len - out, "%d ", i); | |
279 | ||
280 | return out; | |
281 | } | |
282 | ||
283 | static int dump_mle(struct dlm_master_list_entry *mle, char *buf, int len) | |
284 | { | |
285 | int out = 0; | |
e5a0334c SM |
286 | char *mle_type; |
287 | ||
e5a0334c SM |
288 | if (mle->type == DLM_MLE_BLOCK) |
289 | mle_type = "BLK"; | |
290 | else if (mle->type == DLM_MLE_MASTER) | |
291 | mle_type = "MAS"; | |
292 | else | |
293 | mle_type = "MIG"; | |
294 | ||
7141514b | 295 | out += stringify_lockname(mle->mname, mle->mnamelen, buf + out, len - out); |
e5a0334c SM |
296 | out += snprintf(buf + out, len - out, |
297 | "\t%3s\tmas=%3u\tnew=%3u\tevt=%1d\tuse=%1d\tref=%3d\n", | |
298 | mle_type, mle->master, mle->new_master, | |
299 | !list_empty(&mle->hb_events), | |
300 | !!mle->inuse, | |
301 | atomic_read(&mle->mle_refs.refcount)); | |
302 | ||
303 | out += snprintf(buf + out, len - out, "Maybe="); | |
304 | out += stringify_nodemap(mle->maybe_map, O2NM_MAX_NODES, | |
305 | buf + out, len - out); | |
306 | out += snprintf(buf + out, len - out, "\n"); | |
307 | ||
308 | out += snprintf(buf + out, len - out, "Vote="); | |
309 | out += stringify_nodemap(mle->vote_map, O2NM_MAX_NODES, | |
310 | buf + out, len - out); | |
311 | out += snprintf(buf + out, len - out, "\n"); | |
312 | ||
313 | out += snprintf(buf + out, len - out, "Response="); | |
314 | out += stringify_nodemap(mle->response_map, O2NM_MAX_NODES, | |
315 | buf + out, len - out); | |
316 | out += snprintf(buf + out, len - out, "\n"); | |
317 | ||
318 | out += snprintf(buf + out, len - out, "Node="); | |
319 | out += stringify_nodemap(mle->node_map, O2NM_MAX_NODES, | |
320 | buf + out, len - out); | |
321 | out += snprintf(buf + out, len - out, "\n"); | |
322 | ||
323 | out += snprintf(buf + out, len - out, "\n"); | |
324 | ||
325 | return out; | |
326 | } | |
327 | ||
328 | void dlm_print_one_mle(struct dlm_master_list_entry *mle) | |
329 | { | |
330 | char *buf; | |
331 | ||
332 | buf = (char *) get_zeroed_page(GFP_NOFS); | |
333 | if (buf) { | |
334 | dump_mle(mle, buf, PAGE_SIZE - 1); | |
335 | free_page((unsigned long)buf); | |
336 | } | |
337 | } | |
338 | ||
339 | #ifdef CONFIG_DEBUG_FS | |
340 | ||
1a5c4e2a | 341 | static struct dentry *dlm_debugfs_root; |
e5a0334c | 342 | |
6325b4a2 | 343 | #define DLM_DEBUGFS_DIR "o2dlm" |
007dce53 | 344 | #define DLM_DEBUGFS_DLM_STATE "dlm_state" |
4e3d24ed | 345 | #define DLM_DEBUGFS_LOCKING_STATE "locking_state" |
d0129ace | 346 | #define DLM_DEBUGFS_MLE_STATE "mle_state" |
7209300a | 347 | #define DLM_DEBUGFS_PURGE_LIST "purge_list" |
007dce53 SM |
348 | |
349 | /* begin - utils funcs */ | |
02bd9c39 | 350 | static int debug_release(struct inode *inode, struct file *file) |
007dce53 | 351 | { |
02bd9c39 SM |
352 | free_page((unsigned long)file->private_data); |
353 | return 0; | |
007dce53 SM |
354 | } |
355 | ||
02bd9c39 SM |
356 | static ssize_t debug_read(struct file *file, char __user *buf, |
357 | size_t nbytes, loff_t *ppos) | |
007dce53 | 358 | { |
02bd9c39 SM |
359 | return simple_read_from_buffer(buf, nbytes, ppos, file->private_data, |
360 | i_size_read(file->f_mapping->host)); | |
007dce53 SM |
361 | } |
362 | /* end - util funcs */ | |
363 | ||
7209300a | 364 | /* begin - purge list funcs */ |
02bd9c39 | 365 | static int debug_purgelist_print(struct dlm_ctxt *dlm, char *buf, int len) |
7209300a SM |
366 | { |
367 | struct dlm_lock_resource *res; | |
368 | int out = 0; | |
369 | unsigned long total = 0; | |
370 | ||
02bd9c39 | 371 | out += snprintf(buf + out, len - out, |
7209300a SM |
372 | "Dumping Purgelist for Domain: %s\n", dlm->name); |
373 | ||
374 | spin_lock(&dlm->spinlock); | |
375 | list_for_each_entry(res, &dlm->purge_list, purge) { | |
376 | ++total; | |
02bd9c39 | 377 | if (len - out < 100) |
7209300a SM |
378 | continue; |
379 | spin_lock(&res->spinlock); | |
380 | out += stringify_lockname(res->lockname.name, | |
381 | res->lockname.len, | |
02bd9c39 SM |
382 | buf + out, len - out); |
383 | out += snprintf(buf + out, len - out, "\t%ld\n", | |
7209300a SM |
384 | (jiffies - res->last_used)/HZ); |
385 | spin_unlock(&res->spinlock); | |
386 | } | |
387 | spin_unlock(&dlm->spinlock); | |
388 | ||
79c83ea1 | 389 | out += snprintf(buf + out, len - out, "Total on list: %lu\n", total); |
7209300a SM |
390 | |
391 | return out; | |
392 | } | |
393 | ||
394 | static int debug_purgelist_open(struct inode *inode, struct file *file) | |
395 | { | |
396 | struct dlm_ctxt *dlm = inode->i_private; | |
02bd9c39 | 397 | char *buf = NULL; |
7209300a | 398 | |
02bd9c39 SM |
399 | buf = (char *) get_zeroed_page(GFP_NOFS); |
400 | if (!buf) | |
7209300a SM |
401 | goto bail; |
402 | ||
02bd9c39 | 403 | i_size_write(inode, debug_purgelist_print(dlm, buf, PAGE_SIZE - 1)); |
7209300a | 404 | |
02bd9c39 | 405 | file->private_data = buf; |
7209300a SM |
406 | |
407 | return 0; | |
408 | bail: | |
409 | return -ENOMEM; | |
410 | } | |
411 | ||
828c0950 | 412 | static const struct file_operations debug_purgelist_fops = { |
7209300a | 413 | .open = debug_purgelist_open, |
02bd9c39 SM |
414 | .release = debug_release, |
415 | .read = debug_read, | |
416 | .llseek = generic_file_llseek, | |
7209300a SM |
417 | }; |
418 | /* end - purge list funcs */ | |
419 | ||
d0129ace | 420 | /* begin - debug mle funcs */ |
02bd9c39 | 421 | static int debug_mle_print(struct dlm_ctxt *dlm, char *buf, int len) |
d0129ace SM |
422 | { |
423 | struct dlm_master_list_entry *mle; | |
2ed6c750 | 424 | struct hlist_head *bucket; |
2ed6c750 | 425 | int i, out = 0; |
93f3b86f | 426 | unsigned long total = 0, longest = 0, bucket_count = 0; |
d0129ace | 427 | |
02bd9c39 | 428 | out += snprintf(buf + out, len - out, |
d0129ace SM |
429 | "Dumping MLEs for Domain: %s\n", dlm->name); |
430 | ||
431 | spin_lock(&dlm->master_lock); | |
2ed6c750 SM |
432 | for (i = 0; i < DLM_HASH_BUCKETS; i++) { |
433 | bucket = dlm_master_hash(dlm, i); | |
df53cd3b | 434 | hlist_for_each_entry(mle, bucket, master_hash_node) { |
2ed6c750 | 435 | ++total; |
93f3b86f | 436 | ++bucket_count; |
02bd9c39 | 437 | if (len - out < 200) |
2ed6c750 | 438 | continue; |
02bd9c39 | 439 | out += dump_mle(mle, buf + out, len - out); |
2ed6c750 | 440 | } |
93f3b86f JB |
441 | longest = max(longest, bucket_count); |
442 | bucket_count = 0; | |
d0129ace SM |
443 | } |
444 | spin_unlock(&dlm->master_lock); | |
445 | ||
02bd9c39 | 446 | out += snprintf(buf + out, len - out, |
79c83ea1 | 447 | "Total: %lu, Longest: %lu\n", total, longest); |
d0129ace SM |
448 | return out; |
449 | } | |
450 | ||
451 | static int debug_mle_open(struct inode *inode, struct file *file) | |
452 | { | |
453 | struct dlm_ctxt *dlm = inode->i_private; | |
02bd9c39 | 454 | char *buf = NULL; |
d0129ace | 455 | |
02bd9c39 SM |
456 | buf = (char *) get_zeroed_page(GFP_NOFS); |
457 | if (!buf) | |
d0129ace SM |
458 | goto bail; |
459 | ||
02bd9c39 | 460 | i_size_write(inode, debug_mle_print(dlm, buf, PAGE_SIZE - 1)); |
d0129ace | 461 | |
02bd9c39 | 462 | file->private_data = buf; |
d0129ace SM |
463 | |
464 | return 0; | |
465 | bail: | |
466 | return -ENOMEM; | |
467 | } | |
468 | ||
828c0950 | 469 | static const struct file_operations debug_mle_fops = { |
d0129ace | 470 | .open = debug_mle_open, |
02bd9c39 SM |
471 | .release = debug_release, |
472 | .read = debug_read, | |
473 | .llseek = generic_file_llseek, | |
d0129ace SM |
474 | }; |
475 | ||
476 | /* end - debug mle funcs */ | |
477 | ||
4e3d24ed SM |
478 | /* begin - debug lockres funcs */ |
479 | static int dump_lock(struct dlm_lock *lock, int list_type, char *buf, int len) | |
480 | { | |
481 | int out; | |
482 | ||
483 | #define DEBUG_LOCK_VERSION 1 | |
484 | spin_lock(&lock->spinlock); | |
485 | out = snprintf(buf, len, "LOCK:%d,%d,%d,%d,%d,%d:%lld,%d,%d,%d,%d,%d," | |
486 | "%d,%d,%d,%d\n", | |
487 | DEBUG_LOCK_VERSION, | |
488 | list_type, lock->ml.type, lock->ml.convert_type, | |
489 | lock->ml.node, | |
490 | dlm_get_lock_cookie_node(be64_to_cpu(lock->ml.cookie)), | |
491 | dlm_get_lock_cookie_seq(be64_to_cpu(lock->ml.cookie)), | |
492 | !list_empty(&lock->ast_list), | |
493 | !list_empty(&lock->bast_list), | |
494 | lock->ast_pending, lock->bast_pending, | |
495 | lock->convert_pending, lock->lock_pending, | |
496 | lock->cancel_pending, lock->unlock_pending, | |
497 | atomic_read(&lock->lock_refs.refcount)); | |
498 | spin_unlock(&lock->spinlock); | |
499 | ||
500 | return out; | |
501 | } | |
502 | ||
503 | static int dump_lockres(struct dlm_lock_resource *res, char *buf, int len) | |
504 | { | |
505 | struct dlm_lock *lock; | |
506 | int i; | |
507 | int out = 0; | |
508 | ||
509 | out += snprintf(buf + out, len - out, "NAME:"); | |
510 | out += stringify_lockname(res->lockname.name, res->lockname.len, | |
511 | buf + out, len - out); | |
512 | out += snprintf(buf + out, len - out, "\n"); | |
513 | ||
514 | #define DEBUG_LRES_VERSION 1 | |
515 | out += snprintf(buf + out, len - out, | |
516 | "LRES:%d,%d,%d,%ld,%d,%d,%d,%d,%d,%d,%d\n", | |
517 | DEBUG_LRES_VERSION, | |
518 | res->owner, res->state, res->last_used, | |
519 | !list_empty(&res->purge), | |
520 | !list_empty(&res->dirty), | |
521 | !list_empty(&res->recovering), | |
522 | res->inflight_locks, res->migration_pending, | |
523 | atomic_read(&res->asts_reserved), | |
524 | atomic_read(&res->refs.refcount)); | |
525 | ||
526 | /* refmap */ | |
527 | out += snprintf(buf + out, len - out, "RMAP:"); | |
528 | out += stringify_nodemap(res->refmap, O2NM_MAX_NODES, | |
529 | buf + out, len - out); | |
530 | out += snprintf(buf + out, len - out, "\n"); | |
531 | ||
532 | /* lvb */ | |
533 | out += snprintf(buf + out, len - out, "LVBX:"); | |
534 | for (i = 0; i < DLM_LVB_LEN; i++) | |
535 | out += snprintf(buf + out, len - out, | |
536 | "%02x", (unsigned char)res->lvb[i]); | |
537 | out += snprintf(buf + out, len - out, "\n"); | |
538 | ||
539 | /* granted */ | |
540 | list_for_each_entry(lock, &res->granted, list) | |
541 | out += dump_lock(lock, 0, buf + out, len - out); | |
542 | ||
543 | /* converting */ | |
544 | list_for_each_entry(lock, &res->converting, list) | |
545 | out += dump_lock(lock, 1, buf + out, len - out); | |
546 | ||
547 | /* blocked */ | |
548 | list_for_each_entry(lock, &res->blocked, list) | |
549 | out += dump_lock(lock, 2, buf + out, len - out); | |
550 | ||
551 | out += snprintf(buf + out, len - out, "\n"); | |
552 | ||
553 | return out; | |
554 | } | |
555 | ||
556 | static void *lockres_seq_start(struct seq_file *m, loff_t *pos) | |
557 | { | |
558 | struct debug_lockres *dl = m->private; | |
559 | struct dlm_ctxt *dlm = dl->dl_ctxt; | |
b0d4f817 | 560 | struct dlm_lock_resource *oldres = dl->dl_res; |
4e3d24ed | 561 | struct dlm_lock_resource *res = NULL; |
b0d4f817 | 562 | struct list_head *track_list; |
4e3d24ed | 563 | |
b0d4f817 SM |
564 | spin_lock(&dlm->track_lock); |
565 | if (oldres) | |
566 | track_list = &oldres->tracking; | |
228ac635 | 567 | else { |
b0d4f817 | 568 | track_list = &dlm->tracking_list; |
228ac635 TY |
569 | if (list_empty(track_list)) { |
570 | dl = NULL; | |
571 | spin_unlock(&dlm->track_lock); | |
572 | goto bail; | |
573 | } | |
574 | } | |
4e3d24ed | 575 | |
b0d4f817 SM |
576 | list_for_each_entry(res, track_list, tracking) { |
577 | if (&res->tracking == &dlm->tracking_list) | |
578 | res = NULL; | |
579 | else | |
4e3d24ed | 580 | dlm_lockres_get(res); |
b0d4f817 | 581 | break; |
4e3d24ed | 582 | } |
b0d4f817 | 583 | spin_unlock(&dlm->track_lock); |
4e3d24ed | 584 | |
b0d4f817 SM |
585 | if (oldres) |
586 | dlm_lockres_put(oldres); | |
4e3d24ed | 587 | |
b0d4f817 SM |
588 | dl->dl_res = res; |
589 | ||
590 | if (res) { | |
591 | spin_lock(&res->spinlock); | |
592 | dump_lockres(res, dl->dl_buf, dl->dl_len - 1); | |
593 | spin_unlock(&res->spinlock); | |
594 | } else | |
595 | dl = NULL; | |
4e3d24ed | 596 | |
228ac635 | 597 | bail: |
b0d4f817 | 598 | /* passed to seq_show */ |
4e3d24ed SM |
599 | return dl; |
600 | } | |
601 | ||
602 | static void lockres_seq_stop(struct seq_file *m, void *v) | |
603 | { | |
604 | } | |
605 | ||
606 | static void *lockres_seq_next(struct seq_file *m, void *v, loff_t *pos) | |
607 | { | |
608 | return NULL; | |
609 | } | |
610 | ||
611 | static int lockres_seq_show(struct seq_file *s, void *v) | |
612 | { | |
613 | struct debug_lockres *dl = (struct debug_lockres *)v; | |
614 | ||
615 | seq_printf(s, "%s", dl->dl_buf); | |
616 | ||
617 | return 0; | |
618 | } | |
619 | ||
88e9d34c | 620 | static const struct seq_operations debug_lockres_ops = { |
4e3d24ed SM |
621 | .start = lockres_seq_start, |
622 | .stop = lockres_seq_stop, | |
623 | .next = lockres_seq_next, | |
624 | .show = lockres_seq_show, | |
625 | }; | |
626 | ||
627 | static int debug_lockres_open(struct inode *inode, struct file *file) | |
628 | { | |
629 | struct dlm_ctxt *dlm = inode->i_private; | |
8f9ac032 RJ |
630 | struct debug_lockres *dl; |
631 | void *buf; | |
4e3d24ed | 632 | |
8f9ac032 RJ |
633 | buf = kmalloc(PAGE_SIZE, GFP_KERNEL); |
634 | if (!buf) | |
4e3d24ed | 635 | goto bail; |
4e3d24ed | 636 | |
8f9ac032 RJ |
637 | dl = __seq_open_private(file, &debug_lockres_ops, sizeof(*dl)); |
638 | if (!dl) | |
639 | goto bailfree; | |
4e3d24ed | 640 | |
8f9ac032 RJ |
641 | dl->dl_len = PAGE_SIZE; |
642 | dl->dl_buf = buf; | |
4e3d24ed SM |
643 | |
644 | dlm_grab(dlm); | |
645 | dl->dl_ctxt = dlm; | |
646 | ||
647 | return 0; | |
8f9ac032 RJ |
648 | |
649 | bailfree: | |
650 | kfree(buf); | |
4e3d24ed | 651 | bail: |
8f9ac032 RJ |
652 | mlog_errno(-ENOMEM); |
653 | return -ENOMEM; | |
4e3d24ed SM |
654 | } |
655 | ||
656 | static int debug_lockres_release(struct inode *inode, struct file *file) | |
657 | { | |
33fa1d90 | 658 | struct seq_file *seq = file->private_data; |
4e3d24ed SM |
659 | struct debug_lockres *dl = (struct debug_lockres *)seq->private; |
660 | ||
661 | if (dl->dl_res) | |
662 | dlm_lockres_put(dl->dl_res); | |
663 | dlm_put(dl->dl_ctxt); | |
664 | kfree(dl->dl_buf); | |
665 | return seq_release_private(inode, file); | |
666 | } | |
667 | ||
828c0950 | 668 | static const struct file_operations debug_lockres_fops = { |
4e3d24ed SM |
669 | .open = debug_lockres_open, |
670 | .release = debug_lockres_release, | |
671 | .read = seq_read, | |
672 | .llseek = seq_lseek, | |
673 | }; | |
674 | /* end - debug lockres funcs */ | |
675 | ||
007dce53 | 676 | /* begin - debug state funcs */ |
02bd9c39 | 677 | static int debug_state_print(struct dlm_ctxt *dlm, char *buf, int len) |
007dce53 SM |
678 | { |
679 | int out = 0; | |
680 | struct dlm_reco_node_data *node; | |
681 | char *state; | |
e64ff146 SM |
682 | int cur_mles = 0, tot_mles = 0; |
683 | int i; | |
007dce53 SM |
684 | |
685 | spin_lock(&dlm->spinlock); | |
686 | ||
687 | switch (dlm->dlm_state) { | |
688 | case DLM_CTXT_NEW: | |
689 | state = "NEW"; break; | |
690 | case DLM_CTXT_JOINED: | |
691 | state = "JOINED"; break; | |
692 | case DLM_CTXT_IN_SHUTDOWN: | |
693 | state = "SHUTDOWN"; break; | |
694 | case DLM_CTXT_LEAVING: | |
695 | state = "LEAVING"; break; | |
696 | default: | |
697 | state = "UNKNOWN"; break; | |
698 | } | |
699 | ||
700 | /* Domain: xxxxxxxxxx Key: 0xdfbac769 */ | |
02bd9c39 | 701 | out += snprintf(buf + out, len - out, |
b1365d0b SM |
702 | "Domain: %s Key: 0x%08x Protocol: %d.%d\n", |
703 | dlm->name, dlm->key, dlm->dlm_locking_proto.pv_major, | |
704 | dlm->dlm_locking_proto.pv_minor); | |
007dce53 SM |
705 | |
706 | /* Thread Pid: xxx Node: xxx State: xxxxx */ | |
02bd9c39 | 707 | out += snprintf(buf + out, len - out, |
007dce53 | 708 | "Thread Pid: %d Node: %d State: %s\n", |
37096a79 | 709 | task_pid_nr(dlm->dlm_thread_task), dlm->node_num, state); |
007dce53 SM |
710 | |
711 | /* Number of Joins: xxx Joining Node: xxx */ | |
02bd9c39 | 712 | out += snprintf(buf + out, len - out, |
007dce53 SM |
713 | "Number of Joins: %d Joining Node: %d\n", |
714 | dlm->num_joins, dlm->joining_node); | |
715 | ||
716 | /* Domain Map: xx xx xx */ | |
02bd9c39 | 717 | out += snprintf(buf + out, len - out, "Domain Map: "); |
007dce53 | 718 | out += stringify_nodemap(dlm->domain_map, O2NM_MAX_NODES, |
02bd9c39 SM |
719 | buf + out, len - out); |
720 | out += snprintf(buf + out, len - out, "\n"); | |
007dce53 | 721 | |
bddefdee SM |
722 | /* Exit Domain Map: xx xx xx */ |
723 | out += snprintf(buf + out, len - out, "Exit Domain Map: "); | |
724 | out += stringify_nodemap(dlm->exit_domain_map, O2NM_MAX_NODES, | |
725 | buf + out, len - out); | |
726 | out += snprintf(buf + out, len - out, "\n"); | |
727 | ||
007dce53 | 728 | /* Live Map: xx xx xx */ |
02bd9c39 | 729 | out += snprintf(buf + out, len - out, "Live Map: "); |
007dce53 | 730 | out += stringify_nodemap(dlm->live_nodes_map, O2NM_MAX_NODES, |
02bd9c39 SM |
731 | buf + out, len - out); |
732 | out += snprintf(buf + out, len - out, "\n"); | |
007dce53 | 733 | |
e64ff146 | 734 | /* Lock Resources: xxx (xxx) */ |
02bd9c39 | 735 | out += snprintf(buf + out, len - out, |
e64ff146 SM |
736 | "Lock Resources: %d (%d)\n", |
737 | atomic_read(&dlm->res_cur_count), | |
738 | atomic_read(&dlm->res_tot_count)); | |
739 | ||
740 | for (i = 0; i < DLM_MLE_NUM_TYPES; ++i) | |
741 | tot_mles += atomic_read(&dlm->mle_tot_count[i]); | |
742 | ||
743 | for (i = 0; i < DLM_MLE_NUM_TYPES; ++i) | |
744 | cur_mles += atomic_read(&dlm->mle_cur_count[i]); | |
745 | ||
746 | /* MLEs: xxx (xxx) */ | |
02bd9c39 | 747 | out += snprintf(buf + out, len - out, |
e64ff146 SM |
748 | "MLEs: %d (%d)\n", cur_mles, tot_mles); |
749 | ||
750 | /* Blocking: xxx (xxx) */ | |
02bd9c39 | 751 | out += snprintf(buf + out, len - out, |
e64ff146 SM |
752 | " Blocking: %d (%d)\n", |
753 | atomic_read(&dlm->mle_cur_count[DLM_MLE_BLOCK]), | |
754 | atomic_read(&dlm->mle_tot_count[DLM_MLE_BLOCK])); | |
755 | ||
756 | /* Mastery: xxx (xxx) */ | |
02bd9c39 | 757 | out += snprintf(buf + out, len - out, |
e64ff146 SM |
758 | " Mastery: %d (%d)\n", |
759 | atomic_read(&dlm->mle_cur_count[DLM_MLE_MASTER]), | |
760 | atomic_read(&dlm->mle_tot_count[DLM_MLE_MASTER])); | |
761 | ||
762 | /* Migration: xxx (xxx) */ | |
02bd9c39 | 763 | out += snprintf(buf + out, len - out, |
e64ff146 SM |
764 | " Migration: %d (%d)\n", |
765 | atomic_read(&dlm->mle_cur_count[DLM_MLE_MIGRATION]), | |
766 | atomic_read(&dlm->mle_tot_count[DLM_MLE_MIGRATION])); | |
767 | ||
007dce53 | 768 | /* Lists: Dirty=Empty Purge=InUse PendingASTs=Empty ... */ |
02bd9c39 | 769 | out += snprintf(buf + out, len - out, |
007dce53 | 770 | "Lists: Dirty=%s Purge=%s PendingASTs=%s " |
2ed6c750 | 771 | "PendingBASTs=%s\n", |
007dce53 SM |
772 | (list_empty(&dlm->dirty_list) ? "Empty" : "InUse"), |
773 | (list_empty(&dlm->purge_list) ? "Empty" : "InUse"), | |
774 | (list_empty(&dlm->pending_asts) ? "Empty" : "InUse"), | |
2ed6c750 | 775 | (list_empty(&dlm->pending_basts) ? "Empty" : "InUse")); |
007dce53 SM |
776 | |
777 | /* Purge Count: xxx Refs: xxx */ | |
02bd9c39 | 778 | out += snprintf(buf + out, len - out, |
007dce53 SM |
779 | "Purge Count: %d Refs: %d\n", dlm->purge_count, |
780 | atomic_read(&dlm->dlm_refs.refcount)); | |
781 | ||
782 | /* Dead Node: xxx */ | |
02bd9c39 | 783 | out += snprintf(buf + out, len - out, |
007dce53 SM |
784 | "Dead Node: %d\n", dlm->reco.dead_node); |
785 | ||
786 | /* What about DLM_RECO_STATE_FINALIZE? */ | |
787 | if (dlm->reco.state == DLM_RECO_STATE_ACTIVE) | |
788 | state = "ACTIVE"; | |
789 | else | |
790 | state = "INACTIVE"; | |
791 | ||
792 | /* Recovery Pid: xxxx Master: xxx State: xxxx */ | |
02bd9c39 | 793 | out += snprintf(buf + out, len - out, |
007dce53 | 794 | "Recovery Pid: %d Master: %d State: %s\n", |
37096a79 | 795 | task_pid_nr(dlm->dlm_reco_thread_task), |
007dce53 SM |
796 | dlm->reco.new_master, state); |
797 | ||
798 | /* Recovery Map: xx xx */ | |
02bd9c39 | 799 | out += snprintf(buf + out, len - out, "Recovery Map: "); |
007dce53 | 800 | out += stringify_nodemap(dlm->recovery_map, O2NM_MAX_NODES, |
02bd9c39 SM |
801 | buf + out, len - out); |
802 | out += snprintf(buf + out, len - out, "\n"); | |
007dce53 SM |
803 | |
804 | /* Recovery Node State: */ | |
02bd9c39 | 805 | out += snprintf(buf + out, len - out, "Recovery Node State:\n"); |
007dce53 SM |
806 | list_for_each_entry(node, &dlm->reco.node_data, list) { |
807 | switch (node->state) { | |
808 | case DLM_RECO_NODE_DATA_INIT: | |
809 | state = "INIT"; | |
810 | break; | |
811 | case DLM_RECO_NODE_DATA_REQUESTING: | |
812 | state = "REQUESTING"; | |
813 | break; | |
814 | case DLM_RECO_NODE_DATA_DEAD: | |
815 | state = "DEAD"; | |
816 | break; | |
817 | case DLM_RECO_NODE_DATA_RECEIVING: | |
818 | state = "RECEIVING"; | |
819 | break; | |
820 | case DLM_RECO_NODE_DATA_REQUESTED: | |
821 | state = "REQUESTED"; | |
822 | break; | |
823 | case DLM_RECO_NODE_DATA_DONE: | |
824 | state = "DONE"; | |
825 | break; | |
826 | case DLM_RECO_NODE_DATA_FINALIZE_SENT: | |
827 | state = "FINALIZE-SENT"; | |
828 | break; | |
829 | default: | |
830 | state = "BAD"; | |
831 | break; | |
832 | } | |
02bd9c39 | 833 | out += snprintf(buf + out, len - out, "\t%u - %s\n", |
007dce53 SM |
834 | node->node_num, state); |
835 | } | |
836 | ||
837 | spin_unlock(&dlm->spinlock); | |
838 | ||
839 | return out; | |
840 | } | |
841 | ||
842 | static int debug_state_open(struct inode *inode, struct file *file) | |
843 | { | |
844 | struct dlm_ctxt *dlm = inode->i_private; | |
02bd9c39 | 845 | char *buf = NULL; |
007dce53 | 846 | |
02bd9c39 SM |
847 | buf = (char *) get_zeroed_page(GFP_NOFS); |
848 | if (!buf) | |
007dce53 SM |
849 | goto bail; |
850 | ||
02bd9c39 | 851 | i_size_write(inode, debug_state_print(dlm, buf, PAGE_SIZE - 1)); |
007dce53 | 852 | |
02bd9c39 | 853 | file->private_data = buf; |
007dce53 SM |
854 | |
855 | return 0; | |
856 | bail: | |
857 | return -ENOMEM; | |
858 | } | |
859 | ||
828c0950 | 860 | static const struct file_operations debug_state_fops = { |
007dce53 | 861 | .open = debug_state_open, |
02bd9c39 SM |
862 | .release = debug_release, |
863 | .read = debug_read, | |
864 | .llseek = generic_file_llseek, | |
007dce53 SM |
865 | }; |
866 | /* end - debug state funcs */ | |
867 | ||
868 | /* files in subroot */ | |
869 | int dlm_debug_init(struct dlm_ctxt *dlm) | |
870 | { | |
871 | struct dlm_debug_ctxt *dc = dlm->dlm_debug_ctxt; | |
872 | ||
873 | /* for dumping dlm_ctxt */ | |
874 | dc->debug_state_dentry = debugfs_create_file(DLM_DEBUGFS_DLM_STATE, | |
875 | S_IFREG|S_IRUSR, | |
876 | dlm->dlm_debugfs_subroot, | |
877 | dlm, &debug_state_fops); | |
878 | if (!dc->debug_state_dentry) { | |
879 | mlog_errno(-ENOMEM); | |
880 | goto bail; | |
881 | } | |
882 | ||
4e3d24ed SM |
883 | /* for dumping lockres */ |
884 | dc->debug_lockres_dentry = | |
885 | debugfs_create_file(DLM_DEBUGFS_LOCKING_STATE, | |
886 | S_IFREG|S_IRUSR, | |
887 | dlm->dlm_debugfs_subroot, | |
888 | dlm, &debug_lockres_fops); | |
889 | if (!dc->debug_lockres_dentry) { | |
890 | mlog_errno(-ENOMEM); | |
891 | goto bail; | |
892 | } | |
893 | ||
d0129ace SM |
894 | /* for dumping mles */ |
895 | dc->debug_mle_dentry = debugfs_create_file(DLM_DEBUGFS_MLE_STATE, | |
896 | S_IFREG|S_IRUSR, | |
897 | dlm->dlm_debugfs_subroot, | |
898 | dlm, &debug_mle_fops); | |
899 | if (!dc->debug_mle_dentry) { | |
900 | mlog_errno(-ENOMEM); | |
901 | goto bail; | |
902 | } | |
903 | ||
7209300a SM |
904 | /* for dumping lockres on the purge list */ |
905 | dc->debug_purgelist_dentry = | |
906 | debugfs_create_file(DLM_DEBUGFS_PURGE_LIST, | |
907 | S_IFREG|S_IRUSR, | |
908 | dlm->dlm_debugfs_subroot, | |
909 | dlm, &debug_purgelist_fops); | |
910 | if (!dc->debug_purgelist_dentry) { | |
911 | mlog_errno(-ENOMEM); | |
912 | goto bail; | |
913 | } | |
914 | ||
007dce53 SM |
915 | return 0; |
916 | ||
917 | bail: | |
007dce53 SM |
918 | return -ENOMEM; |
919 | } | |
920 | ||
921 | void dlm_debug_shutdown(struct dlm_ctxt *dlm) | |
922 | { | |
923 | struct dlm_debug_ctxt *dc = dlm->dlm_debug_ctxt; | |
924 | ||
925 | if (dc) { | |
37096a79 SM |
926 | debugfs_remove(dc->debug_purgelist_dentry); |
927 | debugfs_remove(dc->debug_mle_dentry); | |
928 | debugfs_remove(dc->debug_lockres_dentry); | |
929 | debugfs_remove(dc->debug_state_dentry); | |
8ec7b17a JQ |
930 | kfree(dc); |
931 | dc = NULL; | |
007dce53 SM |
932 | } |
933 | } | |
6325b4a2 SM |
934 | |
935 | /* subroot - domain dir */ | |
936 | int dlm_create_debugfs_subroot(struct dlm_ctxt *dlm) | |
937 | { | |
938 | dlm->dlm_debugfs_subroot = debugfs_create_dir(dlm->name, | |
939 | dlm_debugfs_root); | |
940 | if (!dlm->dlm_debugfs_subroot) { | |
941 | mlog_errno(-ENOMEM); | |
942 | goto bail; | |
943 | } | |
944 | ||
007dce53 SM |
945 | dlm->dlm_debug_ctxt = kzalloc(sizeof(struct dlm_debug_ctxt), |
946 | GFP_KERNEL); | |
947 | if (!dlm->dlm_debug_ctxt) { | |
948 | mlog_errno(-ENOMEM); | |
949 | goto bail; | |
950 | } | |
007dce53 | 951 | |
6325b4a2 SM |
952 | return 0; |
953 | bail: | |
954 | dlm_destroy_debugfs_subroot(dlm); | |
955 | return -ENOMEM; | |
956 | } | |
957 | ||
958 | void dlm_destroy_debugfs_subroot(struct dlm_ctxt *dlm) | |
959 | { | |
37096a79 | 960 | debugfs_remove(dlm->dlm_debugfs_subroot); |
6325b4a2 SM |
961 | } |
962 | ||
963 | /* debugfs root */ | |
964 | int dlm_create_debugfs_root(void) | |
965 | { | |
966 | dlm_debugfs_root = debugfs_create_dir(DLM_DEBUGFS_DIR, NULL); | |
967 | if (!dlm_debugfs_root) { | |
968 | mlog_errno(-ENOMEM); | |
969 | return -ENOMEM; | |
970 | } | |
971 | return 0; | |
972 | } | |
973 | ||
974 | void dlm_destroy_debugfs_root(void) | |
975 | { | |
37096a79 | 976 | debugfs_remove(dlm_debugfs_root); |
6325b4a2 SM |
977 | } |
978 | #endif /* CONFIG_DEBUG_FS */ |