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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 | { | |
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 | 105 | stringify_lockname(res->lockname.name, res->lockname.len, |
86a06aba | 106 | buf, sizeof(buf)); |
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 | ||
02bd9c39 | 374 | static int debug_release(struct inode *inode, struct file *file) |
007dce53 | 375 | { |
02bd9c39 SM |
376 | free_page((unsigned long)file->private_data); |
377 | return 0; | |
007dce53 SM |
378 | } |
379 | ||
02bd9c39 SM |
380 | static ssize_t debug_read(struct file *file, char __user *buf, |
381 | size_t nbytes, loff_t *ppos) | |
007dce53 | 382 | { |
02bd9c39 SM |
383 | return simple_read_from_buffer(buf, nbytes, ppos, file->private_data, |
384 | i_size_read(file->f_mapping->host)); | |
007dce53 SM |
385 | } |
386 | /* end - util funcs */ | |
387 | ||
7209300a | 388 | /* begin - purge list funcs */ |
02bd9c39 | 389 | static int debug_purgelist_print(struct dlm_ctxt *dlm, char *buf, int len) |
7209300a SM |
390 | { |
391 | struct dlm_lock_resource *res; | |
392 | int out = 0; | |
393 | unsigned long total = 0; | |
394 | ||
02bd9c39 | 395 | out += snprintf(buf + out, len - out, |
7209300a SM |
396 | "Dumping Purgelist for Domain: %s\n", dlm->name); |
397 | ||
398 | spin_lock(&dlm->spinlock); | |
399 | list_for_each_entry(res, &dlm->purge_list, purge) { | |
400 | ++total; | |
02bd9c39 | 401 | if (len - out < 100) |
7209300a SM |
402 | continue; |
403 | spin_lock(&res->spinlock); | |
404 | out += stringify_lockname(res->lockname.name, | |
405 | res->lockname.len, | |
02bd9c39 SM |
406 | buf + out, len - out); |
407 | out += snprintf(buf + out, len - out, "\t%ld\n", | |
7209300a SM |
408 | (jiffies - res->last_used)/HZ); |
409 | spin_unlock(&res->spinlock); | |
410 | } | |
411 | spin_unlock(&dlm->spinlock); | |
412 | ||
02bd9c39 | 413 | out += snprintf(buf + out, len - out, "Total on list: %ld\n", total); |
7209300a SM |
414 | |
415 | return out; | |
416 | } | |
417 | ||
418 | static int debug_purgelist_open(struct inode *inode, struct file *file) | |
419 | { | |
420 | struct dlm_ctxt *dlm = inode->i_private; | |
02bd9c39 | 421 | char *buf = NULL; |
7209300a | 422 | |
02bd9c39 SM |
423 | buf = (char *) get_zeroed_page(GFP_NOFS); |
424 | if (!buf) | |
7209300a SM |
425 | goto bail; |
426 | ||
02bd9c39 | 427 | i_size_write(inode, debug_purgelist_print(dlm, buf, PAGE_SIZE - 1)); |
7209300a | 428 | |
02bd9c39 | 429 | file->private_data = buf; |
7209300a SM |
430 | |
431 | return 0; | |
432 | bail: | |
433 | return -ENOMEM; | |
434 | } | |
435 | ||
828c0950 | 436 | static const struct file_operations debug_purgelist_fops = { |
7209300a | 437 | .open = debug_purgelist_open, |
02bd9c39 SM |
438 | .release = debug_release, |
439 | .read = debug_read, | |
440 | .llseek = generic_file_llseek, | |
7209300a SM |
441 | }; |
442 | /* end - purge list funcs */ | |
443 | ||
d0129ace | 444 | /* begin - debug mle funcs */ |
02bd9c39 | 445 | static int debug_mle_print(struct dlm_ctxt *dlm, char *buf, int len) |
d0129ace SM |
446 | { |
447 | struct dlm_master_list_entry *mle; | |
2ed6c750 SM |
448 | struct hlist_head *bucket; |
449 | struct hlist_node *list; | |
450 | int i, out = 0; | |
93f3b86f | 451 | unsigned long total = 0, longest = 0, bucket_count = 0; |
d0129ace | 452 | |
02bd9c39 | 453 | out += snprintf(buf + out, len - out, |
d0129ace SM |
454 | "Dumping MLEs for Domain: %s\n", dlm->name); |
455 | ||
456 | spin_lock(&dlm->master_lock); | |
2ed6c750 SM |
457 | for (i = 0; i < DLM_HASH_BUCKETS; i++) { |
458 | bucket = dlm_master_hash(dlm, i); | |
459 | hlist_for_each(list, bucket) { | |
460 | mle = hlist_entry(list, struct dlm_master_list_entry, | |
461 | master_hash_node); | |
462 | ++total; | |
93f3b86f | 463 | ++bucket_count; |
02bd9c39 | 464 | if (len - out < 200) |
2ed6c750 | 465 | continue; |
02bd9c39 | 466 | out += dump_mle(mle, buf + out, len - out); |
2ed6c750 | 467 | } |
93f3b86f JB |
468 | longest = max(longest, bucket_count); |
469 | bucket_count = 0; | |
d0129ace SM |
470 | } |
471 | spin_unlock(&dlm->master_lock); | |
472 | ||
02bd9c39 | 473 | out += snprintf(buf + out, len - out, |
9405dccf | 474 | "Total: %ld, Longest: %ld\n", total, longest); |
d0129ace SM |
475 | return out; |
476 | } | |
477 | ||
478 | static int debug_mle_open(struct inode *inode, struct file *file) | |
479 | { | |
480 | struct dlm_ctxt *dlm = inode->i_private; | |
02bd9c39 | 481 | char *buf = NULL; |
d0129ace | 482 | |
02bd9c39 SM |
483 | buf = (char *) get_zeroed_page(GFP_NOFS); |
484 | if (!buf) | |
d0129ace SM |
485 | goto bail; |
486 | ||
02bd9c39 | 487 | i_size_write(inode, debug_mle_print(dlm, buf, PAGE_SIZE - 1)); |
d0129ace | 488 | |
02bd9c39 | 489 | file->private_data = buf; |
d0129ace SM |
490 | |
491 | return 0; | |
492 | bail: | |
493 | return -ENOMEM; | |
494 | } | |
495 | ||
828c0950 | 496 | static const struct file_operations debug_mle_fops = { |
d0129ace | 497 | .open = debug_mle_open, |
02bd9c39 SM |
498 | .release = debug_release, |
499 | .read = debug_read, | |
500 | .llseek = generic_file_llseek, | |
d0129ace SM |
501 | }; |
502 | ||
503 | /* end - debug mle funcs */ | |
504 | ||
4e3d24ed SM |
505 | /* begin - debug lockres funcs */ |
506 | static int dump_lock(struct dlm_lock *lock, int list_type, char *buf, int len) | |
507 | { | |
508 | int out; | |
509 | ||
510 | #define DEBUG_LOCK_VERSION 1 | |
511 | spin_lock(&lock->spinlock); | |
512 | out = snprintf(buf, len, "LOCK:%d,%d,%d,%d,%d,%d:%lld,%d,%d,%d,%d,%d," | |
513 | "%d,%d,%d,%d\n", | |
514 | DEBUG_LOCK_VERSION, | |
515 | list_type, lock->ml.type, lock->ml.convert_type, | |
516 | lock->ml.node, | |
517 | dlm_get_lock_cookie_node(be64_to_cpu(lock->ml.cookie)), | |
518 | dlm_get_lock_cookie_seq(be64_to_cpu(lock->ml.cookie)), | |
519 | !list_empty(&lock->ast_list), | |
520 | !list_empty(&lock->bast_list), | |
521 | lock->ast_pending, lock->bast_pending, | |
522 | lock->convert_pending, lock->lock_pending, | |
523 | lock->cancel_pending, lock->unlock_pending, | |
524 | atomic_read(&lock->lock_refs.refcount)); | |
525 | spin_unlock(&lock->spinlock); | |
526 | ||
527 | return out; | |
528 | } | |
529 | ||
530 | static int dump_lockres(struct dlm_lock_resource *res, char *buf, int len) | |
531 | { | |
532 | struct dlm_lock *lock; | |
533 | int i; | |
534 | int out = 0; | |
535 | ||
536 | out += snprintf(buf + out, len - out, "NAME:"); | |
537 | out += stringify_lockname(res->lockname.name, res->lockname.len, | |
538 | buf + out, len - out); | |
539 | out += snprintf(buf + out, len - out, "\n"); | |
540 | ||
541 | #define DEBUG_LRES_VERSION 1 | |
542 | out += snprintf(buf + out, len - out, | |
543 | "LRES:%d,%d,%d,%ld,%d,%d,%d,%d,%d,%d,%d\n", | |
544 | DEBUG_LRES_VERSION, | |
545 | res->owner, res->state, res->last_used, | |
546 | !list_empty(&res->purge), | |
547 | !list_empty(&res->dirty), | |
548 | !list_empty(&res->recovering), | |
549 | res->inflight_locks, res->migration_pending, | |
550 | atomic_read(&res->asts_reserved), | |
551 | atomic_read(&res->refs.refcount)); | |
552 | ||
553 | /* refmap */ | |
554 | out += snprintf(buf + out, len - out, "RMAP:"); | |
555 | out += stringify_nodemap(res->refmap, O2NM_MAX_NODES, | |
556 | buf + out, len - out); | |
557 | out += snprintf(buf + out, len - out, "\n"); | |
558 | ||
559 | /* lvb */ | |
560 | out += snprintf(buf + out, len - out, "LVBX:"); | |
561 | for (i = 0; i < DLM_LVB_LEN; i++) | |
562 | out += snprintf(buf + out, len - out, | |
563 | "%02x", (unsigned char)res->lvb[i]); | |
564 | out += snprintf(buf + out, len - out, "\n"); | |
565 | ||
566 | /* granted */ | |
567 | list_for_each_entry(lock, &res->granted, list) | |
568 | out += dump_lock(lock, 0, buf + out, len - out); | |
569 | ||
570 | /* converting */ | |
571 | list_for_each_entry(lock, &res->converting, list) | |
572 | out += dump_lock(lock, 1, buf + out, len - out); | |
573 | ||
574 | /* blocked */ | |
575 | list_for_each_entry(lock, &res->blocked, list) | |
576 | out += dump_lock(lock, 2, buf + out, len - out); | |
577 | ||
578 | out += snprintf(buf + out, len - out, "\n"); | |
579 | ||
580 | return out; | |
581 | } | |
582 | ||
583 | static void *lockres_seq_start(struct seq_file *m, loff_t *pos) | |
584 | { | |
585 | struct debug_lockres *dl = m->private; | |
586 | struct dlm_ctxt *dlm = dl->dl_ctxt; | |
b0d4f817 | 587 | struct dlm_lock_resource *oldres = dl->dl_res; |
4e3d24ed | 588 | struct dlm_lock_resource *res = NULL; |
b0d4f817 | 589 | struct list_head *track_list; |
4e3d24ed | 590 | |
b0d4f817 SM |
591 | spin_lock(&dlm->track_lock); |
592 | if (oldres) | |
593 | track_list = &oldres->tracking; | |
228ac635 | 594 | else { |
b0d4f817 | 595 | track_list = &dlm->tracking_list; |
228ac635 TY |
596 | if (list_empty(track_list)) { |
597 | dl = NULL; | |
598 | spin_unlock(&dlm->track_lock); | |
599 | goto bail; | |
600 | } | |
601 | } | |
4e3d24ed | 602 | |
b0d4f817 SM |
603 | list_for_each_entry(res, track_list, tracking) { |
604 | if (&res->tracking == &dlm->tracking_list) | |
605 | res = NULL; | |
606 | else | |
4e3d24ed | 607 | dlm_lockres_get(res); |
b0d4f817 | 608 | break; |
4e3d24ed | 609 | } |
b0d4f817 | 610 | spin_unlock(&dlm->track_lock); |
4e3d24ed | 611 | |
b0d4f817 SM |
612 | if (oldres) |
613 | dlm_lockres_put(oldres); | |
4e3d24ed | 614 | |
b0d4f817 SM |
615 | dl->dl_res = res; |
616 | ||
617 | if (res) { | |
618 | spin_lock(&res->spinlock); | |
619 | dump_lockres(res, dl->dl_buf, dl->dl_len - 1); | |
620 | spin_unlock(&res->spinlock); | |
621 | } else | |
622 | dl = NULL; | |
4e3d24ed | 623 | |
228ac635 | 624 | bail: |
b0d4f817 | 625 | /* passed to seq_show */ |
4e3d24ed SM |
626 | return dl; |
627 | } | |
628 | ||
629 | static void lockres_seq_stop(struct seq_file *m, void *v) | |
630 | { | |
631 | } | |
632 | ||
633 | static void *lockres_seq_next(struct seq_file *m, void *v, loff_t *pos) | |
634 | { | |
635 | return NULL; | |
636 | } | |
637 | ||
638 | static int lockres_seq_show(struct seq_file *s, void *v) | |
639 | { | |
640 | struct debug_lockres *dl = (struct debug_lockres *)v; | |
641 | ||
642 | seq_printf(s, "%s", dl->dl_buf); | |
643 | ||
644 | return 0; | |
645 | } | |
646 | ||
88e9d34c | 647 | static const struct seq_operations debug_lockres_ops = { |
4e3d24ed SM |
648 | .start = lockres_seq_start, |
649 | .stop = lockres_seq_stop, | |
650 | .next = lockres_seq_next, | |
651 | .show = lockres_seq_show, | |
652 | }; | |
653 | ||
654 | static int debug_lockres_open(struct inode *inode, struct file *file) | |
655 | { | |
656 | struct dlm_ctxt *dlm = inode->i_private; | |
657 | int ret = -ENOMEM; | |
658 | struct seq_file *seq; | |
659 | struct debug_lockres *dl = NULL; | |
660 | ||
661 | dl = kzalloc(sizeof(struct debug_lockres), GFP_KERNEL); | |
662 | if (!dl) { | |
663 | mlog_errno(ret); | |
664 | goto bail; | |
665 | } | |
666 | ||
667 | dl->dl_len = PAGE_SIZE; | |
668 | dl->dl_buf = kmalloc(dl->dl_len, GFP_KERNEL); | |
669 | if (!dl->dl_buf) { | |
670 | mlog_errno(ret); | |
671 | goto bail; | |
672 | } | |
673 | ||
674 | ret = seq_open(file, &debug_lockres_ops); | |
675 | if (ret) { | |
676 | mlog_errno(ret); | |
677 | goto bail; | |
678 | } | |
679 | ||
33fa1d90 | 680 | seq = file->private_data; |
4e3d24ed SM |
681 | seq->private = dl; |
682 | ||
683 | dlm_grab(dlm); | |
684 | dl->dl_ctxt = dlm; | |
685 | ||
686 | return 0; | |
687 | bail: | |
688 | if (dl) | |
689 | kfree(dl->dl_buf); | |
690 | kfree(dl); | |
691 | return ret; | |
692 | } | |
693 | ||
694 | static int debug_lockres_release(struct inode *inode, struct file *file) | |
695 | { | |
33fa1d90 | 696 | struct seq_file *seq = file->private_data; |
4e3d24ed SM |
697 | struct debug_lockres *dl = (struct debug_lockres *)seq->private; |
698 | ||
699 | if (dl->dl_res) | |
700 | dlm_lockres_put(dl->dl_res); | |
701 | dlm_put(dl->dl_ctxt); | |
702 | kfree(dl->dl_buf); | |
703 | return seq_release_private(inode, file); | |
704 | } | |
705 | ||
828c0950 | 706 | static const struct file_operations debug_lockres_fops = { |
4e3d24ed SM |
707 | .open = debug_lockres_open, |
708 | .release = debug_lockres_release, | |
709 | .read = seq_read, | |
710 | .llseek = seq_lseek, | |
711 | }; | |
712 | /* end - debug lockres funcs */ | |
713 | ||
007dce53 | 714 | /* begin - debug state funcs */ |
02bd9c39 | 715 | static int debug_state_print(struct dlm_ctxt *dlm, char *buf, int len) |
007dce53 SM |
716 | { |
717 | int out = 0; | |
718 | struct dlm_reco_node_data *node; | |
719 | char *state; | |
e64ff146 SM |
720 | int cur_mles = 0, tot_mles = 0; |
721 | int i; | |
007dce53 SM |
722 | |
723 | spin_lock(&dlm->spinlock); | |
724 | ||
725 | switch (dlm->dlm_state) { | |
726 | case DLM_CTXT_NEW: | |
727 | state = "NEW"; break; | |
728 | case DLM_CTXT_JOINED: | |
729 | state = "JOINED"; break; | |
730 | case DLM_CTXT_IN_SHUTDOWN: | |
731 | state = "SHUTDOWN"; break; | |
732 | case DLM_CTXT_LEAVING: | |
733 | state = "LEAVING"; break; | |
734 | default: | |
735 | state = "UNKNOWN"; break; | |
736 | } | |
737 | ||
738 | /* Domain: xxxxxxxxxx Key: 0xdfbac769 */ | |
02bd9c39 | 739 | out += snprintf(buf + out, len - out, |
b1365d0b SM |
740 | "Domain: %s Key: 0x%08x Protocol: %d.%d\n", |
741 | dlm->name, dlm->key, dlm->dlm_locking_proto.pv_major, | |
742 | dlm->dlm_locking_proto.pv_minor); | |
007dce53 SM |
743 | |
744 | /* Thread Pid: xxx Node: xxx State: xxxxx */ | |
02bd9c39 | 745 | out += snprintf(buf + out, len - out, |
007dce53 | 746 | "Thread Pid: %d Node: %d State: %s\n", |
37096a79 | 747 | task_pid_nr(dlm->dlm_thread_task), dlm->node_num, state); |
007dce53 SM |
748 | |
749 | /* Number of Joins: xxx Joining Node: xxx */ | |
02bd9c39 | 750 | out += snprintf(buf + out, len - out, |
007dce53 SM |
751 | "Number of Joins: %d Joining Node: %d\n", |
752 | dlm->num_joins, dlm->joining_node); | |
753 | ||
754 | /* Domain Map: xx xx xx */ | |
02bd9c39 | 755 | out += snprintf(buf + out, len - out, "Domain Map: "); |
007dce53 | 756 | out += stringify_nodemap(dlm->domain_map, O2NM_MAX_NODES, |
02bd9c39 SM |
757 | buf + out, len - out); |
758 | out += snprintf(buf + out, len - out, "\n"); | |
007dce53 | 759 | |
bddefdee SM |
760 | /* Exit Domain Map: xx xx xx */ |
761 | out += snprintf(buf + out, len - out, "Exit Domain Map: "); | |
762 | out += stringify_nodemap(dlm->exit_domain_map, O2NM_MAX_NODES, | |
763 | buf + out, len - out); | |
764 | out += snprintf(buf + out, len - out, "\n"); | |
765 | ||
007dce53 | 766 | /* Live Map: xx xx xx */ |
02bd9c39 | 767 | out += snprintf(buf + out, len - out, "Live Map: "); |
007dce53 | 768 | out += stringify_nodemap(dlm->live_nodes_map, O2NM_MAX_NODES, |
02bd9c39 SM |
769 | buf + out, len - out); |
770 | out += snprintf(buf + out, len - out, "\n"); | |
007dce53 | 771 | |
e64ff146 | 772 | /* Lock Resources: xxx (xxx) */ |
02bd9c39 | 773 | out += snprintf(buf + out, len - out, |
e64ff146 SM |
774 | "Lock Resources: %d (%d)\n", |
775 | atomic_read(&dlm->res_cur_count), | |
776 | atomic_read(&dlm->res_tot_count)); | |
777 | ||
778 | for (i = 0; i < DLM_MLE_NUM_TYPES; ++i) | |
779 | tot_mles += atomic_read(&dlm->mle_tot_count[i]); | |
780 | ||
781 | for (i = 0; i < DLM_MLE_NUM_TYPES; ++i) | |
782 | cur_mles += atomic_read(&dlm->mle_cur_count[i]); | |
783 | ||
784 | /* MLEs: xxx (xxx) */ | |
02bd9c39 | 785 | out += snprintf(buf + out, len - out, |
e64ff146 SM |
786 | "MLEs: %d (%d)\n", cur_mles, tot_mles); |
787 | ||
788 | /* Blocking: xxx (xxx) */ | |
02bd9c39 | 789 | out += snprintf(buf + out, len - out, |
e64ff146 SM |
790 | " Blocking: %d (%d)\n", |
791 | atomic_read(&dlm->mle_cur_count[DLM_MLE_BLOCK]), | |
792 | atomic_read(&dlm->mle_tot_count[DLM_MLE_BLOCK])); | |
793 | ||
794 | /* Mastery: xxx (xxx) */ | |
02bd9c39 | 795 | out += snprintf(buf + out, len - out, |
e64ff146 SM |
796 | " Mastery: %d (%d)\n", |
797 | atomic_read(&dlm->mle_cur_count[DLM_MLE_MASTER]), | |
798 | atomic_read(&dlm->mle_tot_count[DLM_MLE_MASTER])); | |
799 | ||
800 | /* Migration: xxx (xxx) */ | |
02bd9c39 | 801 | out += snprintf(buf + out, len - out, |
e64ff146 SM |
802 | " Migration: %d (%d)\n", |
803 | atomic_read(&dlm->mle_cur_count[DLM_MLE_MIGRATION]), | |
804 | atomic_read(&dlm->mle_tot_count[DLM_MLE_MIGRATION])); | |
805 | ||
007dce53 | 806 | /* Lists: Dirty=Empty Purge=InUse PendingASTs=Empty ... */ |
02bd9c39 | 807 | out += snprintf(buf + out, len - out, |
007dce53 | 808 | "Lists: Dirty=%s Purge=%s PendingASTs=%s " |
2ed6c750 | 809 | "PendingBASTs=%s\n", |
007dce53 SM |
810 | (list_empty(&dlm->dirty_list) ? "Empty" : "InUse"), |
811 | (list_empty(&dlm->purge_list) ? "Empty" : "InUse"), | |
812 | (list_empty(&dlm->pending_asts) ? "Empty" : "InUse"), | |
2ed6c750 | 813 | (list_empty(&dlm->pending_basts) ? "Empty" : "InUse")); |
007dce53 SM |
814 | |
815 | /* Purge Count: xxx Refs: xxx */ | |
02bd9c39 | 816 | out += snprintf(buf + out, len - out, |
007dce53 SM |
817 | "Purge Count: %d Refs: %d\n", dlm->purge_count, |
818 | atomic_read(&dlm->dlm_refs.refcount)); | |
819 | ||
820 | /* Dead Node: xxx */ | |
02bd9c39 | 821 | out += snprintf(buf + out, len - out, |
007dce53 SM |
822 | "Dead Node: %d\n", dlm->reco.dead_node); |
823 | ||
824 | /* What about DLM_RECO_STATE_FINALIZE? */ | |
825 | if (dlm->reco.state == DLM_RECO_STATE_ACTIVE) | |
826 | state = "ACTIVE"; | |
827 | else | |
828 | state = "INACTIVE"; | |
829 | ||
830 | /* Recovery Pid: xxxx Master: xxx State: xxxx */ | |
02bd9c39 | 831 | out += snprintf(buf + out, len - out, |
007dce53 | 832 | "Recovery Pid: %d Master: %d State: %s\n", |
37096a79 | 833 | task_pid_nr(dlm->dlm_reco_thread_task), |
007dce53 SM |
834 | dlm->reco.new_master, state); |
835 | ||
836 | /* Recovery Map: xx xx */ | |
02bd9c39 | 837 | out += snprintf(buf + out, len - out, "Recovery Map: "); |
007dce53 | 838 | out += stringify_nodemap(dlm->recovery_map, O2NM_MAX_NODES, |
02bd9c39 SM |
839 | buf + out, len - out); |
840 | out += snprintf(buf + out, len - out, "\n"); | |
007dce53 SM |
841 | |
842 | /* Recovery Node State: */ | |
02bd9c39 | 843 | out += snprintf(buf + out, len - out, "Recovery Node State:\n"); |
007dce53 SM |
844 | list_for_each_entry(node, &dlm->reco.node_data, list) { |
845 | switch (node->state) { | |
846 | case DLM_RECO_NODE_DATA_INIT: | |
847 | state = "INIT"; | |
848 | break; | |
849 | case DLM_RECO_NODE_DATA_REQUESTING: | |
850 | state = "REQUESTING"; | |
851 | break; | |
852 | case DLM_RECO_NODE_DATA_DEAD: | |
853 | state = "DEAD"; | |
854 | break; | |
855 | case DLM_RECO_NODE_DATA_RECEIVING: | |
856 | state = "RECEIVING"; | |
857 | break; | |
858 | case DLM_RECO_NODE_DATA_REQUESTED: | |
859 | state = "REQUESTED"; | |
860 | break; | |
861 | case DLM_RECO_NODE_DATA_DONE: | |
862 | state = "DONE"; | |
863 | break; | |
864 | case DLM_RECO_NODE_DATA_FINALIZE_SENT: | |
865 | state = "FINALIZE-SENT"; | |
866 | break; | |
867 | default: | |
868 | state = "BAD"; | |
869 | break; | |
870 | } | |
02bd9c39 | 871 | out += snprintf(buf + out, len - out, "\t%u - %s\n", |
007dce53 SM |
872 | node->node_num, state); |
873 | } | |
874 | ||
875 | spin_unlock(&dlm->spinlock); | |
876 | ||
877 | return out; | |
878 | } | |
879 | ||
880 | static int debug_state_open(struct inode *inode, struct file *file) | |
881 | { | |
882 | struct dlm_ctxt *dlm = inode->i_private; | |
02bd9c39 | 883 | char *buf = NULL; |
007dce53 | 884 | |
02bd9c39 SM |
885 | buf = (char *) get_zeroed_page(GFP_NOFS); |
886 | if (!buf) | |
007dce53 SM |
887 | goto bail; |
888 | ||
02bd9c39 | 889 | i_size_write(inode, debug_state_print(dlm, buf, PAGE_SIZE - 1)); |
007dce53 | 890 | |
02bd9c39 | 891 | file->private_data = buf; |
007dce53 SM |
892 | |
893 | return 0; | |
894 | bail: | |
895 | return -ENOMEM; | |
896 | } | |
897 | ||
828c0950 | 898 | static const struct file_operations debug_state_fops = { |
007dce53 | 899 | .open = debug_state_open, |
02bd9c39 SM |
900 | .release = debug_release, |
901 | .read = debug_read, | |
902 | .llseek = generic_file_llseek, | |
007dce53 SM |
903 | }; |
904 | /* end - debug state funcs */ | |
905 | ||
906 | /* files in subroot */ | |
907 | int dlm_debug_init(struct dlm_ctxt *dlm) | |
908 | { | |
909 | struct dlm_debug_ctxt *dc = dlm->dlm_debug_ctxt; | |
910 | ||
911 | /* for dumping dlm_ctxt */ | |
912 | dc->debug_state_dentry = debugfs_create_file(DLM_DEBUGFS_DLM_STATE, | |
913 | S_IFREG|S_IRUSR, | |
914 | dlm->dlm_debugfs_subroot, | |
915 | dlm, &debug_state_fops); | |
916 | if (!dc->debug_state_dentry) { | |
917 | mlog_errno(-ENOMEM); | |
918 | goto bail; | |
919 | } | |
920 | ||
4e3d24ed SM |
921 | /* for dumping lockres */ |
922 | dc->debug_lockres_dentry = | |
923 | debugfs_create_file(DLM_DEBUGFS_LOCKING_STATE, | |
924 | S_IFREG|S_IRUSR, | |
925 | dlm->dlm_debugfs_subroot, | |
926 | dlm, &debug_lockres_fops); | |
927 | if (!dc->debug_lockres_dentry) { | |
928 | mlog_errno(-ENOMEM); | |
929 | goto bail; | |
930 | } | |
931 | ||
d0129ace SM |
932 | /* for dumping mles */ |
933 | dc->debug_mle_dentry = debugfs_create_file(DLM_DEBUGFS_MLE_STATE, | |
934 | S_IFREG|S_IRUSR, | |
935 | dlm->dlm_debugfs_subroot, | |
936 | dlm, &debug_mle_fops); | |
937 | if (!dc->debug_mle_dentry) { | |
938 | mlog_errno(-ENOMEM); | |
939 | goto bail; | |
940 | } | |
941 | ||
7209300a SM |
942 | /* for dumping lockres on the purge list */ |
943 | dc->debug_purgelist_dentry = | |
944 | debugfs_create_file(DLM_DEBUGFS_PURGE_LIST, | |
945 | S_IFREG|S_IRUSR, | |
946 | dlm->dlm_debugfs_subroot, | |
947 | dlm, &debug_purgelist_fops); | |
948 | if (!dc->debug_purgelist_dentry) { | |
949 | mlog_errno(-ENOMEM); | |
950 | goto bail; | |
951 | } | |
952 | ||
007dce53 SM |
953 | dlm_debug_get(dc); |
954 | return 0; | |
955 | ||
956 | bail: | |
957 | dlm_debug_shutdown(dlm); | |
958 | return -ENOMEM; | |
959 | } | |
960 | ||
961 | void dlm_debug_shutdown(struct dlm_ctxt *dlm) | |
962 | { | |
963 | struct dlm_debug_ctxt *dc = dlm->dlm_debug_ctxt; | |
964 | ||
965 | if (dc) { | |
37096a79 SM |
966 | debugfs_remove(dc->debug_purgelist_dentry); |
967 | debugfs_remove(dc->debug_mle_dentry); | |
968 | debugfs_remove(dc->debug_lockres_dentry); | |
969 | debugfs_remove(dc->debug_state_dentry); | |
007dce53 SM |
970 | dlm_debug_put(dc); |
971 | } | |
972 | } | |
6325b4a2 SM |
973 | |
974 | /* subroot - domain dir */ | |
975 | int dlm_create_debugfs_subroot(struct dlm_ctxt *dlm) | |
976 | { | |
977 | dlm->dlm_debugfs_subroot = debugfs_create_dir(dlm->name, | |
978 | dlm_debugfs_root); | |
979 | if (!dlm->dlm_debugfs_subroot) { | |
980 | mlog_errno(-ENOMEM); | |
981 | goto bail; | |
982 | } | |
983 | ||
007dce53 SM |
984 | dlm->dlm_debug_ctxt = kzalloc(sizeof(struct dlm_debug_ctxt), |
985 | GFP_KERNEL); | |
986 | if (!dlm->dlm_debug_ctxt) { | |
987 | mlog_errno(-ENOMEM); | |
988 | goto bail; | |
989 | } | |
990 | kref_init(&dlm->dlm_debug_ctxt->debug_refcnt); | |
991 | ||
6325b4a2 SM |
992 | return 0; |
993 | bail: | |
994 | dlm_destroy_debugfs_subroot(dlm); | |
995 | return -ENOMEM; | |
996 | } | |
997 | ||
998 | void dlm_destroy_debugfs_subroot(struct dlm_ctxt *dlm) | |
999 | { | |
37096a79 | 1000 | debugfs_remove(dlm->dlm_debugfs_subroot); |
6325b4a2 SM |
1001 | } |
1002 | ||
1003 | /* debugfs root */ | |
1004 | int dlm_create_debugfs_root(void) | |
1005 | { | |
1006 | dlm_debugfs_root = debugfs_create_dir(DLM_DEBUGFS_DIR, NULL); | |
1007 | if (!dlm_debugfs_root) { | |
1008 | mlog_errno(-ENOMEM); | |
1009 | return -ENOMEM; | |
1010 | } | |
1011 | return 0; | |
1012 | } | |
1013 | ||
1014 | void dlm_destroy_debugfs_root(void) | |
1015 | { | |
37096a79 | 1016 | debugfs_remove(dlm_debugfs_root); |
6325b4a2 SM |
1017 | } |
1018 | #endif /* CONFIG_DEBUG_FS */ |