1 /* -*- mode: c; c-basic-offset: 8; -*- 2 * vim: noexpandtab sw=8 ts=8 sts=0: 3 * 4 * dlmdebug.c 5 * 6 * debug functionality for the dlm 7 * 8 * Copyright (C) 2004, 2008 Oracle. All rights reserved. 9 * 10 * This program is free software; you can redistribute it and/or 11 * modify it under the terms of the GNU General Public 12 * License as published by the Free Software Foundation; either 13 * version 2 of the License, or (at your option) any later version. 14 * 15 * This program is distributed in the hope that it will be useful, 16 * but WITHOUT ANY WARRANTY; without even the implied warranty of 17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 18 * General Public License for more details. 19 * 20 * You should have received a copy of the GNU General Public 21 * License along with this program; if not, write to the 22 * Free Software Foundation, Inc., 59 Temple Place - Suite 330, 23 * Boston, MA 021110-1307, USA. 24 * 25 */ 26 27 #include <linux/types.h> 28 #include <linux/slab.h> 29 #include <linux/highmem.h> 30 #include <linux/sysctl.h> 31 #include <linux/spinlock.h> 32 #include <linux/debugfs.h> 33 34 #include "cluster/heartbeat.h" 35 #include "cluster/nodemanager.h" 36 #include "cluster/tcp.h" 37 38 #include "dlmapi.h" 39 #include "dlmcommon.h" 40 #include "dlmdomain.h" 41 #include "dlmdebug.h" 42 43 #define MLOG_MASK_PREFIX ML_DLM 44 #include "cluster/masklog.h" 45 46 static int stringify_lockname(const char *lockname, int locklen, char *buf, 47 int len); 48 49 void dlm_print_one_lock_resource(struct dlm_lock_resource *res) 50 { 51 spin_lock(&res->spinlock); 52 __dlm_print_one_lock_resource(res); 53 spin_unlock(&res->spinlock); 54 } 55 56 static void dlm_print_lockres_refmap(struct dlm_lock_resource *res) 57 { 58 int bit; 59 assert_spin_locked(&res->spinlock); 60 61 printk(" refmap nodes: [ "); 62 bit = 0; 63 while (1) { 64 bit = find_next_bit(res->refmap, O2NM_MAX_NODES, bit); 65 if (bit >= O2NM_MAX_NODES) 66 break; 67 printk("%u ", bit); 68 bit++; 69 } 70 printk("], inflight=%u\n", res->inflight_locks); 71 } 72 73 static void __dlm_print_lock(struct dlm_lock *lock) 74 { 75 spin_lock(&lock->spinlock); 76 77 printk(" type=%d, conv=%d, node=%u, cookie=%u:%llu, " 78 "ref=%u, ast=(empty=%c,pend=%c), bast=(empty=%c,pend=%c), " 79 "pending=(conv=%c,lock=%c,cancel=%c,unlock=%c)\n", 80 lock->ml.type, lock->ml.convert_type, lock->ml.node, 81 dlm_get_lock_cookie_node(be64_to_cpu(lock->ml.cookie)), 82 dlm_get_lock_cookie_seq(be64_to_cpu(lock->ml.cookie)), 83 atomic_read(&lock->lock_refs.refcount), 84 (list_empty(&lock->ast_list) ? 'y' : 'n'), 85 (lock->ast_pending ? 'y' : 'n'), 86 (list_empty(&lock->bast_list) ? 'y' : 'n'), 87 (lock->bast_pending ? 'y' : 'n'), 88 (lock->convert_pending ? 'y' : 'n'), 89 (lock->lock_pending ? 'y' : 'n'), 90 (lock->cancel_pending ? 'y' : 'n'), 91 (lock->unlock_pending ? 'y' : 'n')); 92 93 spin_unlock(&lock->spinlock); 94 } 95 96 void __dlm_print_one_lock_resource(struct dlm_lock_resource *res) 97 { 98 struct list_head *iter2; 99 struct dlm_lock *lock; 100 char buf[DLM_LOCKID_NAME_MAX]; 101 102 assert_spin_locked(&res->spinlock); 103 104 stringify_lockname(res->lockname.name, res->lockname.len, 105 buf, sizeof(buf) - 1); 106 printk("lockres: %s, owner=%u, state=%u\n", 107 buf, res->owner, res->state); 108 printk(" last used: %lu, refcnt: %u, on purge list: %s\n", 109 res->last_used, atomic_read(&res->refs.refcount), 110 list_empty(&res->purge) ? "no" : "yes"); 111 printk(" on dirty list: %s, on reco list: %s, " 112 "migrating pending: %s\n", 113 list_empty(&res->dirty) ? "no" : "yes", 114 list_empty(&res->recovering) ? "no" : "yes", 115 res->migration_pending ? "yes" : "no"); 116 printk(" inflight locks: %d, asts reserved: %d\n", 117 res->inflight_locks, atomic_read(&res->asts_reserved)); 118 dlm_print_lockres_refmap(res); 119 printk(" granted queue:\n"); 120 list_for_each(iter2, &res->granted) { 121 lock = list_entry(iter2, struct dlm_lock, list); 122 __dlm_print_lock(lock); 123 } 124 printk(" converting queue:\n"); 125 list_for_each(iter2, &res->converting) { 126 lock = list_entry(iter2, struct dlm_lock, list); 127 __dlm_print_lock(lock); 128 } 129 printk(" blocked queue:\n"); 130 list_for_each(iter2, &res->blocked) { 131 lock = list_entry(iter2, struct dlm_lock, list); 132 __dlm_print_lock(lock); 133 } 134 } 135 136 void dlm_print_one_lock(struct dlm_lock *lockid) 137 { 138 dlm_print_one_lock_resource(lockid->lockres); 139 } 140 EXPORT_SYMBOL_GPL(dlm_print_one_lock); 141 142 static const char *dlm_errnames[] = { 143 [DLM_NORMAL] = "DLM_NORMAL", 144 [DLM_GRANTED] = "DLM_GRANTED", 145 [DLM_DENIED] = "DLM_DENIED", 146 [DLM_DENIED_NOLOCKS] = "DLM_DENIED_NOLOCKS", 147 [DLM_WORKING] = "DLM_WORKING", 148 [DLM_BLOCKED] = "DLM_BLOCKED", 149 [DLM_BLOCKED_ORPHAN] = "DLM_BLOCKED_ORPHAN", 150 [DLM_DENIED_GRACE_PERIOD] = "DLM_DENIED_GRACE_PERIOD", 151 [DLM_SYSERR] = "DLM_SYSERR", 152 [DLM_NOSUPPORT] = "DLM_NOSUPPORT", 153 [DLM_CANCELGRANT] = "DLM_CANCELGRANT", 154 [DLM_IVLOCKID] = "DLM_IVLOCKID", 155 [DLM_SYNC] = "DLM_SYNC", 156 [DLM_BADTYPE] = "DLM_BADTYPE", 157 [DLM_BADRESOURCE] = "DLM_BADRESOURCE", 158 [DLM_MAXHANDLES] = "DLM_MAXHANDLES", 159 [DLM_NOCLINFO] = "DLM_NOCLINFO", 160 [DLM_NOLOCKMGR] = "DLM_NOLOCKMGR", 161 [DLM_NOPURGED] = "DLM_NOPURGED", 162 [DLM_BADARGS] = "DLM_BADARGS", 163 [DLM_VOID] = "DLM_VOID", 164 [DLM_NOTQUEUED] = "DLM_NOTQUEUED", 165 [DLM_IVBUFLEN] = "DLM_IVBUFLEN", 166 [DLM_CVTUNGRANT] = "DLM_CVTUNGRANT", 167 [DLM_BADPARAM] = "DLM_BADPARAM", 168 [DLM_VALNOTVALID] = "DLM_VALNOTVALID", 169 [DLM_REJECTED] = "DLM_REJECTED", 170 [DLM_ABORT] = "DLM_ABORT", 171 [DLM_CANCEL] = "DLM_CANCEL", 172 [DLM_IVRESHANDLE] = "DLM_IVRESHANDLE", 173 [DLM_DEADLOCK] = "DLM_DEADLOCK", 174 [DLM_DENIED_NOASTS] = "DLM_DENIED_NOASTS", 175 [DLM_FORWARD] = "DLM_FORWARD", 176 [DLM_TIMEOUT] = "DLM_TIMEOUT", 177 [DLM_IVGROUPID] = "DLM_IVGROUPID", 178 [DLM_VERS_CONFLICT] = "DLM_VERS_CONFLICT", 179 [DLM_BAD_DEVICE_PATH] = "DLM_BAD_DEVICE_PATH", 180 [DLM_NO_DEVICE_PERMISSION] = "DLM_NO_DEVICE_PERMISSION", 181 [DLM_NO_CONTROL_DEVICE ] = "DLM_NO_CONTROL_DEVICE ", 182 [DLM_RECOVERING] = "DLM_RECOVERING", 183 [DLM_MIGRATING] = "DLM_MIGRATING", 184 [DLM_MAXSTATS] = "DLM_MAXSTATS", 185 }; 186 187 static const char *dlm_errmsgs[] = { 188 [DLM_NORMAL] = "request in progress", 189 [DLM_GRANTED] = "request granted", 190 [DLM_DENIED] = "request denied", 191 [DLM_DENIED_NOLOCKS] = "request denied, out of system resources", 192 [DLM_WORKING] = "async request in progress", 193 [DLM_BLOCKED] = "lock request blocked", 194 [DLM_BLOCKED_ORPHAN] = "lock request blocked by a orphan lock", 195 [DLM_DENIED_GRACE_PERIOD] = "topological change in progress", 196 [DLM_SYSERR] = "system error", 197 [DLM_NOSUPPORT] = "unsupported", 198 [DLM_CANCELGRANT] = "can't cancel convert: already granted", 199 [DLM_IVLOCKID] = "bad lockid", 200 [DLM_SYNC] = "synchronous request granted", 201 [DLM_BADTYPE] = "bad resource type", 202 [DLM_BADRESOURCE] = "bad resource handle", 203 [DLM_MAXHANDLES] = "no more resource handles", 204 [DLM_NOCLINFO] = "can't contact cluster manager", 205 [DLM_NOLOCKMGR] = "can't contact lock manager", 206 [DLM_NOPURGED] = "can't contact purge daemon", 207 [DLM_BADARGS] = "bad api args", 208 [DLM_VOID] = "no status", 209 [DLM_NOTQUEUED] = "NOQUEUE was specified and request failed", 210 [DLM_IVBUFLEN] = "invalid resource name length", 211 [DLM_CVTUNGRANT] = "attempted to convert ungranted lock", 212 [DLM_BADPARAM] = "invalid lock mode specified", 213 [DLM_VALNOTVALID] = "value block has been invalidated", 214 [DLM_REJECTED] = "request rejected, unrecognized client", 215 [DLM_ABORT] = "blocked lock request cancelled", 216 [DLM_CANCEL] = "conversion request cancelled", 217 [DLM_IVRESHANDLE] = "invalid resource handle", 218 [DLM_DEADLOCK] = "deadlock recovery refused this request", 219 [DLM_DENIED_NOASTS] = "failed to allocate AST", 220 [DLM_FORWARD] = "request must wait for primary's response", 221 [DLM_TIMEOUT] = "timeout value for lock has expired", 222 [DLM_IVGROUPID] = "invalid group specification", 223 [DLM_VERS_CONFLICT] = "version conflicts prevent request handling", 224 [DLM_BAD_DEVICE_PATH] = "Locks device does not exist or path wrong", 225 [DLM_NO_DEVICE_PERMISSION] = "Client has insufficient perms for device", 226 [DLM_NO_CONTROL_DEVICE] = "Cannot set options on opened device ", 227 [DLM_RECOVERING] = "lock resource being recovered", 228 [DLM_MIGRATING] = "lock resource being migrated", 229 [DLM_MAXSTATS] = "invalid error number", 230 }; 231 232 const char *dlm_errmsg(enum dlm_status err) 233 { 234 if (err >= DLM_MAXSTATS || err < 0) 235 return dlm_errmsgs[DLM_MAXSTATS]; 236 return dlm_errmsgs[err]; 237 } 238 EXPORT_SYMBOL_GPL(dlm_errmsg); 239 240 const char *dlm_errname(enum dlm_status err) 241 { 242 if (err >= DLM_MAXSTATS || err < 0) 243 return dlm_errnames[DLM_MAXSTATS]; 244 return dlm_errnames[err]; 245 } 246 EXPORT_SYMBOL_GPL(dlm_errname); 247 248 /* NOTE: This function converts a lockname into a string. It uses knowledge 249 * of the format of the lockname that should be outside the purview of the dlm. 250 * We are adding only to make dlm debugging slightly easier. 251 * 252 * For more on lockname formats, please refer to dlmglue.c and ocfs2_lockid.h. 253 */ 254 static int stringify_lockname(const char *lockname, int locklen, char *buf, 255 int len) 256 { 257 int out = 0; 258 __be64 inode_blkno_be; 259 260 #define OCFS2_DENTRY_LOCK_INO_START 18 261 if (*lockname == 'N') { 262 memcpy((__be64 *)&inode_blkno_be, 263 (char *)&lockname[OCFS2_DENTRY_LOCK_INO_START], 264 sizeof(__be64)); 265 out += snprintf(buf + out, len - out, "%.*s%08x", 266 OCFS2_DENTRY_LOCK_INO_START - 1, lockname, 267 (unsigned int)be64_to_cpu(inode_blkno_be)); 268 } else 269 out += snprintf(buf + out, len - out, "%.*s", 270 locklen, lockname); 271 return out; 272 } 273 274 static int stringify_nodemap(unsigned long *nodemap, int maxnodes, 275 char *buf, int len) 276 { 277 int out = 0; 278 int i = -1; 279 280 while ((i = find_next_bit(nodemap, maxnodes, i + 1)) < maxnodes) 281 out += snprintf(buf + out, len - out, "%d ", i); 282 283 return out; 284 } 285 286 static int dump_mle(struct dlm_master_list_entry *mle, char *buf, int len) 287 { 288 int out = 0; 289 char *mle_type; 290 291 if (mle->type == DLM_MLE_BLOCK) 292 mle_type = "BLK"; 293 else if (mle->type == DLM_MLE_MASTER) 294 mle_type = "MAS"; 295 else 296 mle_type = "MIG"; 297 298 out += stringify_lockname(mle->mname, mle->mnamelen, buf + out, len - out); 299 out += snprintf(buf + out, len - out, 300 "\t%3s\tmas=%3u\tnew=%3u\tevt=%1d\tuse=%1d\tref=%3d\n", 301 mle_type, mle->master, mle->new_master, 302 !list_empty(&mle->hb_events), 303 !!mle->inuse, 304 atomic_read(&mle->mle_refs.refcount)); 305 306 out += snprintf(buf + out, len - out, "Maybe="); 307 out += stringify_nodemap(mle->maybe_map, O2NM_MAX_NODES, 308 buf + out, len - out); 309 out += snprintf(buf + out, len - out, "\n"); 310 311 out += snprintf(buf + out, len - out, "Vote="); 312 out += stringify_nodemap(mle->vote_map, O2NM_MAX_NODES, 313 buf + out, len - out); 314 out += snprintf(buf + out, len - out, "\n"); 315 316 out += snprintf(buf + out, len - out, "Response="); 317 out += stringify_nodemap(mle->response_map, O2NM_MAX_NODES, 318 buf + out, len - out); 319 out += snprintf(buf + out, len - out, "\n"); 320 321 out += snprintf(buf + out, len - out, "Node="); 322 out += stringify_nodemap(mle->node_map, O2NM_MAX_NODES, 323 buf + out, len - out); 324 out += snprintf(buf + out, len - out, "\n"); 325 326 out += snprintf(buf + out, len - out, "\n"); 327 328 return out; 329 } 330 331 void dlm_print_one_mle(struct dlm_master_list_entry *mle) 332 { 333 char *buf; 334 335 buf = (char *) get_zeroed_page(GFP_NOFS); 336 if (buf) { 337 dump_mle(mle, buf, PAGE_SIZE - 1); 338 free_page((unsigned long)buf); 339 } 340 } 341 342 #ifdef CONFIG_DEBUG_FS 343 344 static struct dentry *dlm_debugfs_root = NULL; 345 346 #define DLM_DEBUGFS_DIR "o2dlm" 347 #define DLM_DEBUGFS_DLM_STATE "dlm_state" 348 #define DLM_DEBUGFS_LOCKING_STATE "locking_state" 349 #define DLM_DEBUGFS_MLE_STATE "mle_state" 350 #define DLM_DEBUGFS_PURGE_LIST "purge_list" 351 352 /* begin - utils funcs */ 353 static void dlm_debug_free(struct kref *kref) 354 { 355 struct dlm_debug_ctxt *dc; 356 357 dc = container_of(kref, struct dlm_debug_ctxt, debug_refcnt); 358 359 kfree(dc); 360 } 361 362 static void dlm_debug_put(struct dlm_debug_ctxt *dc) 363 { 364 if (dc) 365 kref_put(&dc->debug_refcnt, dlm_debug_free); 366 } 367 368 static void dlm_debug_get(struct dlm_debug_ctxt *dc) 369 { 370 kref_get(&dc->debug_refcnt); 371 } 372 373 static struct debug_buffer *debug_buffer_allocate(void) 374 { 375 struct debug_buffer *db = NULL; 376 377 db = kzalloc(sizeof(struct debug_buffer), GFP_KERNEL); 378 if (!db) 379 goto bail; 380 381 db->len = PAGE_SIZE; 382 db->buf = kmalloc(db->len, GFP_KERNEL); 383 if (!db->buf) 384 goto bail; 385 386 return db; 387 bail: 388 kfree(db); 389 return NULL; 390 } 391 392 static ssize_t debug_buffer_read(struct file *file, char __user *buf, 393 size_t nbytes, loff_t *ppos) 394 { 395 struct debug_buffer *db = file->private_data; 396 397 return simple_read_from_buffer(buf, nbytes, ppos, db->buf, db->len); 398 } 399 400 static loff_t debug_buffer_llseek(struct file *file, loff_t off, int whence) 401 { 402 struct debug_buffer *db = file->private_data; 403 loff_t new = -1; 404 405 switch (whence) { 406 case 0: 407 new = off; 408 break; 409 case 1: 410 new = file->f_pos + off; 411 break; 412 } 413 414 if (new < 0 || new > db->len) 415 return -EINVAL; 416 417 return (file->f_pos = new); 418 } 419 420 static int debug_buffer_release(struct inode *inode, struct file *file) 421 { 422 struct debug_buffer *db = (struct debug_buffer *)file->private_data; 423 424 if (db) 425 kfree(db->buf); 426 kfree(db); 427 428 return 0; 429 } 430 /* end - util funcs */ 431 432 /* begin - purge list funcs */ 433 static int debug_purgelist_print(struct dlm_ctxt *dlm, struct debug_buffer *db) 434 { 435 struct dlm_lock_resource *res; 436 int out = 0; 437 unsigned long total = 0; 438 439 out += snprintf(db->buf + out, db->len - out, 440 "Dumping Purgelist for Domain: %s\n", dlm->name); 441 442 spin_lock(&dlm->spinlock); 443 list_for_each_entry(res, &dlm->purge_list, purge) { 444 ++total; 445 if (db->len - out < 100) 446 continue; 447 spin_lock(&res->spinlock); 448 out += stringify_lockname(res->lockname.name, 449 res->lockname.len, 450 db->buf + out, db->len - out); 451 out += snprintf(db->buf + out, db->len - out, "\t%ld\n", 452 (jiffies - res->last_used)/HZ); 453 spin_unlock(&res->spinlock); 454 } 455 spin_unlock(&dlm->spinlock); 456 457 out += snprintf(db->buf + out, db->len - out, 458 "Total on list: %ld\n", total); 459 460 return out; 461 } 462 463 static int debug_purgelist_open(struct inode *inode, struct file *file) 464 { 465 struct dlm_ctxt *dlm = inode->i_private; 466 struct debug_buffer *db; 467 468 db = debug_buffer_allocate(); 469 if (!db) 470 goto bail; 471 472 db->len = debug_purgelist_print(dlm, db); 473 474 file->private_data = db; 475 476 return 0; 477 bail: 478 return -ENOMEM; 479 } 480 481 static const struct file_operations debug_purgelist_fops = { 482 .open = debug_purgelist_open, 483 .release = debug_buffer_release, 484 .read = debug_buffer_read, 485 .llseek = debug_buffer_llseek, 486 }; 487 /* end - purge list funcs */ 488 489 /* begin - debug mle funcs */ 490 static int debug_mle_print(struct dlm_ctxt *dlm, struct debug_buffer *db) 491 { 492 struct dlm_master_list_entry *mle; 493 struct hlist_head *bucket; 494 struct hlist_node *list; 495 int i, out = 0; 496 unsigned long total = 0, longest = 0, bktcnt; 497 498 out += snprintf(db->buf + out, db->len - out, 499 "Dumping MLEs for Domain: %s\n", dlm->name); 500 501 spin_lock(&dlm->master_lock); 502 for (i = 0; i < DLM_HASH_BUCKETS; i++) { 503 bucket = dlm_master_hash(dlm, i); 504 hlist_for_each(list, bucket) { 505 mle = hlist_entry(list, struct dlm_master_list_entry, 506 master_hash_node); 507 ++total; 508 ++bktcnt; 509 if (db->len - out < 200) 510 continue; 511 out += dump_mle(mle, db->buf + out, db->len - out); 512 } 513 longest = max(longest, bktcnt); 514 bktcnt = 0; 515 } 516 spin_unlock(&dlm->master_lock); 517 518 out += snprintf(db->buf + out, db->len - out, 519 "Total: %ld, Longest: %ld\n", total, longest); 520 return out; 521 } 522 523 static int debug_mle_open(struct inode *inode, struct file *file) 524 { 525 struct dlm_ctxt *dlm = inode->i_private; 526 struct debug_buffer *db; 527 528 db = debug_buffer_allocate(); 529 if (!db) 530 goto bail; 531 532 db->len = debug_mle_print(dlm, db); 533 534 file->private_data = db; 535 536 return 0; 537 bail: 538 return -ENOMEM; 539 } 540 541 static const struct file_operations debug_mle_fops = { 542 .open = debug_mle_open, 543 .release = debug_buffer_release, 544 .read = debug_buffer_read, 545 .llseek = debug_buffer_llseek, 546 }; 547 548 /* end - debug mle funcs */ 549 550 /* begin - debug lockres funcs */ 551 static int dump_lock(struct dlm_lock *lock, int list_type, char *buf, int len) 552 { 553 int out; 554 555 #define DEBUG_LOCK_VERSION 1 556 spin_lock(&lock->spinlock); 557 out = snprintf(buf, len, "LOCK:%d,%d,%d,%d,%d,%d:%lld,%d,%d,%d,%d,%d," 558 "%d,%d,%d,%d\n", 559 DEBUG_LOCK_VERSION, 560 list_type, lock->ml.type, lock->ml.convert_type, 561 lock->ml.node, 562 dlm_get_lock_cookie_node(be64_to_cpu(lock->ml.cookie)), 563 dlm_get_lock_cookie_seq(be64_to_cpu(lock->ml.cookie)), 564 !list_empty(&lock->ast_list), 565 !list_empty(&lock->bast_list), 566 lock->ast_pending, lock->bast_pending, 567 lock->convert_pending, lock->lock_pending, 568 lock->cancel_pending, lock->unlock_pending, 569 atomic_read(&lock->lock_refs.refcount)); 570 spin_unlock(&lock->spinlock); 571 572 return out; 573 } 574 575 static int dump_lockres(struct dlm_lock_resource *res, char *buf, int len) 576 { 577 struct dlm_lock *lock; 578 int i; 579 int out = 0; 580 581 out += snprintf(buf + out, len - out, "NAME:"); 582 out += stringify_lockname(res->lockname.name, res->lockname.len, 583 buf + out, len - out); 584 out += snprintf(buf + out, len - out, "\n"); 585 586 #define DEBUG_LRES_VERSION 1 587 out += snprintf(buf + out, len - out, 588 "LRES:%d,%d,%d,%ld,%d,%d,%d,%d,%d,%d,%d\n", 589 DEBUG_LRES_VERSION, 590 res->owner, res->state, res->last_used, 591 !list_empty(&res->purge), 592 !list_empty(&res->dirty), 593 !list_empty(&res->recovering), 594 res->inflight_locks, res->migration_pending, 595 atomic_read(&res->asts_reserved), 596 atomic_read(&res->refs.refcount)); 597 598 /* refmap */ 599 out += snprintf(buf + out, len - out, "RMAP:"); 600 out += stringify_nodemap(res->refmap, O2NM_MAX_NODES, 601 buf + out, len - out); 602 out += snprintf(buf + out, len - out, "\n"); 603 604 /* lvb */ 605 out += snprintf(buf + out, len - out, "LVBX:"); 606 for (i = 0; i < DLM_LVB_LEN; i++) 607 out += snprintf(buf + out, len - out, 608 "%02x", (unsigned char)res->lvb[i]); 609 out += snprintf(buf + out, len - out, "\n"); 610 611 /* granted */ 612 list_for_each_entry(lock, &res->granted, list) 613 out += dump_lock(lock, 0, buf + out, len - out); 614 615 /* converting */ 616 list_for_each_entry(lock, &res->converting, list) 617 out += dump_lock(lock, 1, buf + out, len - out); 618 619 /* blocked */ 620 list_for_each_entry(lock, &res->blocked, list) 621 out += dump_lock(lock, 2, buf + out, len - out); 622 623 out += snprintf(buf + out, len - out, "\n"); 624 625 return out; 626 } 627 628 static void *lockres_seq_start(struct seq_file *m, loff_t *pos) 629 { 630 struct debug_lockres *dl = m->private; 631 struct dlm_ctxt *dlm = dl->dl_ctxt; 632 struct dlm_lock_resource *oldres = dl->dl_res; 633 struct dlm_lock_resource *res = NULL; 634 struct list_head *track_list; 635 636 spin_lock(&dlm->track_lock); 637 if (oldres) 638 track_list = &oldres->tracking; 639 else 640 track_list = &dlm->tracking_list; 641 642 list_for_each_entry(res, track_list, tracking) { 643 if (&res->tracking == &dlm->tracking_list) 644 res = NULL; 645 else 646 dlm_lockres_get(res); 647 break; 648 } 649 spin_unlock(&dlm->track_lock); 650 651 if (oldres) 652 dlm_lockres_put(oldres); 653 654 dl->dl_res = res; 655 656 if (res) { 657 spin_lock(&res->spinlock); 658 dump_lockres(res, dl->dl_buf, dl->dl_len - 1); 659 spin_unlock(&res->spinlock); 660 } else 661 dl = NULL; 662 663 /* passed to seq_show */ 664 return dl; 665 } 666 667 static void lockres_seq_stop(struct seq_file *m, void *v) 668 { 669 } 670 671 static void *lockres_seq_next(struct seq_file *m, void *v, loff_t *pos) 672 { 673 return NULL; 674 } 675 676 static int lockres_seq_show(struct seq_file *s, void *v) 677 { 678 struct debug_lockres *dl = (struct debug_lockres *)v; 679 680 seq_printf(s, "%s", dl->dl_buf); 681 682 return 0; 683 } 684 685 static const struct seq_operations debug_lockres_ops = { 686 .start = lockres_seq_start, 687 .stop = lockres_seq_stop, 688 .next = lockres_seq_next, 689 .show = lockres_seq_show, 690 }; 691 692 static int debug_lockres_open(struct inode *inode, struct file *file) 693 { 694 struct dlm_ctxt *dlm = inode->i_private; 695 int ret = -ENOMEM; 696 struct seq_file *seq; 697 struct debug_lockres *dl = NULL; 698 699 dl = kzalloc(sizeof(struct debug_lockres), GFP_KERNEL); 700 if (!dl) { 701 mlog_errno(ret); 702 goto bail; 703 } 704 705 dl->dl_len = PAGE_SIZE; 706 dl->dl_buf = kmalloc(dl->dl_len, GFP_KERNEL); 707 if (!dl->dl_buf) { 708 mlog_errno(ret); 709 goto bail; 710 } 711 712 ret = seq_open(file, &debug_lockres_ops); 713 if (ret) { 714 mlog_errno(ret); 715 goto bail; 716 } 717 718 seq = (struct seq_file *) file->private_data; 719 seq->private = dl; 720 721 dlm_grab(dlm); 722 dl->dl_ctxt = dlm; 723 724 return 0; 725 bail: 726 if (dl) 727 kfree(dl->dl_buf); 728 kfree(dl); 729 return ret; 730 } 731 732 static int debug_lockres_release(struct inode *inode, struct file *file) 733 { 734 struct seq_file *seq = (struct seq_file *)file->private_data; 735 struct debug_lockres *dl = (struct debug_lockres *)seq->private; 736 737 if (dl->dl_res) 738 dlm_lockres_put(dl->dl_res); 739 dlm_put(dl->dl_ctxt); 740 kfree(dl->dl_buf); 741 return seq_release_private(inode, file); 742 } 743 744 static const struct file_operations debug_lockres_fops = { 745 .open = debug_lockres_open, 746 .release = debug_lockres_release, 747 .read = seq_read, 748 .llseek = seq_lseek, 749 }; 750 /* end - debug lockres funcs */ 751 752 /* begin - debug state funcs */ 753 static int debug_state_print(struct dlm_ctxt *dlm, struct debug_buffer *db) 754 { 755 int out = 0; 756 struct dlm_reco_node_data *node; 757 char *state; 758 int cur_mles = 0, tot_mles = 0; 759 int i; 760 761 spin_lock(&dlm->spinlock); 762 763 switch (dlm->dlm_state) { 764 case DLM_CTXT_NEW: 765 state = "NEW"; break; 766 case DLM_CTXT_JOINED: 767 state = "JOINED"; break; 768 case DLM_CTXT_IN_SHUTDOWN: 769 state = "SHUTDOWN"; break; 770 case DLM_CTXT_LEAVING: 771 state = "LEAVING"; break; 772 default: 773 state = "UNKNOWN"; break; 774 } 775 776 /* Domain: xxxxxxxxxx Key: 0xdfbac769 */ 777 out += snprintf(db->buf + out, db->len - out, 778 "Domain: %s Key: 0x%08x\n", dlm->name, dlm->key); 779 780 /* Thread Pid: xxx Node: xxx State: xxxxx */ 781 out += snprintf(db->buf + out, db->len - out, 782 "Thread Pid: %d Node: %d State: %s\n", 783 dlm->dlm_thread_task->pid, dlm->node_num, state); 784 785 /* Number of Joins: xxx Joining Node: xxx */ 786 out += snprintf(db->buf + out, db->len - out, 787 "Number of Joins: %d Joining Node: %d\n", 788 dlm->num_joins, dlm->joining_node); 789 790 /* Domain Map: xx xx xx */ 791 out += snprintf(db->buf + out, db->len - out, "Domain Map: "); 792 out += stringify_nodemap(dlm->domain_map, O2NM_MAX_NODES, 793 db->buf + out, db->len - out); 794 out += snprintf(db->buf + out, db->len - out, "\n"); 795 796 /* Live Map: xx xx xx */ 797 out += snprintf(db->buf + out, db->len - out, "Live Map: "); 798 out += stringify_nodemap(dlm->live_nodes_map, O2NM_MAX_NODES, 799 db->buf + out, db->len - out); 800 out += snprintf(db->buf + out, db->len - out, "\n"); 801 802 /* Lock Resources: xxx (xxx) */ 803 out += snprintf(db->buf + out, db->len - out, 804 "Lock Resources: %d (%d)\n", 805 atomic_read(&dlm->res_cur_count), 806 atomic_read(&dlm->res_tot_count)); 807 808 for (i = 0; i < DLM_MLE_NUM_TYPES; ++i) 809 tot_mles += atomic_read(&dlm->mle_tot_count[i]); 810 811 for (i = 0; i < DLM_MLE_NUM_TYPES; ++i) 812 cur_mles += atomic_read(&dlm->mle_cur_count[i]); 813 814 /* MLEs: xxx (xxx) */ 815 out += snprintf(db->buf + out, db->len - out, 816 "MLEs: %d (%d)\n", cur_mles, tot_mles); 817 818 /* Blocking: xxx (xxx) */ 819 out += snprintf(db->buf + out, db->len - out, 820 " Blocking: %d (%d)\n", 821 atomic_read(&dlm->mle_cur_count[DLM_MLE_BLOCK]), 822 atomic_read(&dlm->mle_tot_count[DLM_MLE_BLOCK])); 823 824 /* Mastery: xxx (xxx) */ 825 out += snprintf(db->buf + out, db->len - out, 826 " Mastery: %d (%d)\n", 827 atomic_read(&dlm->mle_cur_count[DLM_MLE_MASTER]), 828 atomic_read(&dlm->mle_tot_count[DLM_MLE_MASTER])); 829 830 /* Migration: xxx (xxx) */ 831 out += snprintf(db->buf + out, db->len - out, 832 " Migration: %d (%d)\n", 833 atomic_read(&dlm->mle_cur_count[DLM_MLE_MIGRATION]), 834 atomic_read(&dlm->mle_tot_count[DLM_MLE_MIGRATION])); 835 836 /* Lists: Dirty=Empty Purge=InUse PendingASTs=Empty ... */ 837 out += snprintf(db->buf + out, db->len - out, 838 "Lists: Dirty=%s Purge=%s PendingASTs=%s " 839 "PendingBASTs=%s\n", 840 (list_empty(&dlm->dirty_list) ? "Empty" : "InUse"), 841 (list_empty(&dlm->purge_list) ? "Empty" : "InUse"), 842 (list_empty(&dlm->pending_asts) ? "Empty" : "InUse"), 843 (list_empty(&dlm->pending_basts) ? "Empty" : "InUse")); 844 845 /* Purge Count: xxx Refs: xxx */ 846 out += snprintf(db->buf + out, db->len - out, 847 "Purge Count: %d Refs: %d\n", dlm->purge_count, 848 atomic_read(&dlm->dlm_refs.refcount)); 849 850 /* Dead Node: xxx */ 851 out += snprintf(db->buf + out, db->len - out, 852 "Dead Node: %d\n", dlm->reco.dead_node); 853 854 /* What about DLM_RECO_STATE_FINALIZE? */ 855 if (dlm->reco.state == DLM_RECO_STATE_ACTIVE) 856 state = "ACTIVE"; 857 else 858 state = "INACTIVE"; 859 860 /* Recovery Pid: xxxx Master: xxx State: xxxx */ 861 out += snprintf(db->buf + out, db->len - out, 862 "Recovery Pid: %d Master: %d State: %s\n", 863 dlm->dlm_reco_thread_task->pid, 864 dlm->reco.new_master, state); 865 866 /* Recovery Map: xx xx */ 867 out += snprintf(db->buf + out, db->len - out, "Recovery Map: "); 868 out += stringify_nodemap(dlm->recovery_map, O2NM_MAX_NODES, 869 db->buf + out, db->len - out); 870 out += snprintf(db->buf + out, db->len - out, "\n"); 871 872 /* Recovery Node State: */ 873 out += snprintf(db->buf + out, db->len - out, "Recovery Node State:\n"); 874 list_for_each_entry(node, &dlm->reco.node_data, list) { 875 switch (node->state) { 876 case DLM_RECO_NODE_DATA_INIT: 877 state = "INIT"; 878 break; 879 case DLM_RECO_NODE_DATA_REQUESTING: 880 state = "REQUESTING"; 881 break; 882 case DLM_RECO_NODE_DATA_DEAD: 883 state = "DEAD"; 884 break; 885 case DLM_RECO_NODE_DATA_RECEIVING: 886 state = "RECEIVING"; 887 break; 888 case DLM_RECO_NODE_DATA_REQUESTED: 889 state = "REQUESTED"; 890 break; 891 case DLM_RECO_NODE_DATA_DONE: 892 state = "DONE"; 893 break; 894 case DLM_RECO_NODE_DATA_FINALIZE_SENT: 895 state = "FINALIZE-SENT"; 896 break; 897 default: 898 state = "BAD"; 899 break; 900 } 901 out += snprintf(db->buf + out, db->len - out, "\t%u - %s\n", 902 node->node_num, state); 903 } 904 905 spin_unlock(&dlm->spinlock); 906 907 return out; 908 } 909 910 static int debug_state_open(struct inode *inode, struct file *file) 911 { 912 struct dlm_ctxt *dlm = inode->i_private; 913 struct debug_buffer *db = NULL; 914 915 db = debug_buffer_allocate(); 916 if (!db) 917 goto bail; 918 919 db->len = debug_state_print(dlm, db); 920 921 file->private_data = db; 922 923 return 0; 924 bail: 925 return -ENOMEM; 926 } 927 928 static const struct file_operations debug_state_fops = { 929 .open = debug_state_open, 930 .release = debug_buffer_release, 931 .read = debug_buffer_read, 932 .llseek = debug_buffer_llseek, 933 }; 934 /* end - debug state funcs */ 935 936 /* files in subroot */ 937 int dlm_debug_init(struct dlm_ctxt *dlm) 938 { 939 struct dlm_debug_ctxt *dc = dlm->dlm_debug_ctxt; 940 941 /* for dumping dlm_ctxt */ 942 dc->debug_state_dentry = debugfs_create_file(DLM_DEBUGFS_DLM_STATE, 943 S_IFREG|S_IRUSR, 944 dlm->dlm_debugfs_subroot, 945 dlm, &debug_state_fops); 946 if (!dc->debug_state_dentry) { 947 mlog_errno(-ENOMEM); 948 goto bail; 949 } 950 951 /* for dumping lockres */ 952 dc->debug_lockres_dentry = 953 debugfs_create_file(DLM_DEBUGFS_LOCKING_STATE, 954 S_IFREG|S_IRUSR, 955 dlm->dlm_debugfs_subroot, 956 dlm, &debug_lockres_fops); 957 if (!dc->debug_lockres_dentry) { 958 mlog_errno(-ENOMEM); 959 goto bail; 960 } 961 962 /* for dumping mles */ 963 dc->debug_mle_dentry = debugfs_create_file(DLM_DEBUGFS_MLE_STATE, 964 S_IFREG|S_IRUSR, 965 dlm->dlm_debugfs_subroot, 966 dlm, &debug_mle_fops); 967 if (!dc->debug_mle_dentry) { 968 mlog_errno(-ENOMEM); 969 goto bail; 970 } 971 972 /* for dumping lockres on the purge list */ 973 dc->debug_purgelist_dentry = 974 debugfs_create_file(DLM_DEBUGFS_PURGE_LIST, 975 S_IFREG|S_IRUSR, 976 dlm->dlm_debugfs_subroot, 977 dlm, &debug_purgelist_fops); 978 if (!dc->debug_purgelist_dentry) { 979 mlog_errno(-ENOMEM); 980 goto bail; 981 } 982 983 dlm_debug_get(dc); 984 return 0; 985 986 bail: 987 dlm_debug_shutdown(dlm); 988 return -ENOMEM; 989 } 990 991 void dlm_debug_shutdown(struct dlm_ctxt *dlm) 992 { 993 struct dlm_debug_ctxt *dc = dlm->dlm_debug_ctxt; 994 995 if (dc) { 996 if (dc->debug_purgelist_dentry) 997 debugfs_remove(dc->debug_purgelist_dentry); 998 if (dc->debug_mle_dentry) 999 debugfs_remove(dc->debug_mle_dentry); 1000 if (dc->debug_lockres_dentry) 1001 debugfs_remove(dc->debug_lockres_dentry); 1002 if (dc->debug_state_dentry) 1003 debugfs_remove(dc->debug_state_dentry); 1004 dlm_debug_put(dc); 1005 } 1006 } 1007 1008 /* subroot - domain dir */ 1009 int dlm_create_debugfs_subroot(struct dlm_ctxt *dlm) 1010 { 1011 dlm->dlm_debugfs_subroot = debugfs_create_dir(dlm->name, 1012 dlm_debugfs_root); 1013 if (!dlm->dlm_debugfs_subroot) { 1014 mlog_errno(-ENOMEM); 1015 goto bail; 1016 } 1017 1018 dlm->dlm_debug_ctxt = kzalloc(sizeof(struct dlm_debug_ctxt), 1019 GFP_KERNEL); 1020 if (!dlm->dlm_debug_ctxt) { 1021 mlog_errno(-ENOMEM); 1022 goto bail; 1023 } 1024 kref_init(&dlm->dlm_debug_ctxt->debug_refcnt); 1025 1026 return 0; 1027 bail: 1028 dlm_destroy_debugfs_subroot(dlm); 1029 return -ENOMEM; 1030 } 1031 1032 void dlm_destroy_debugfs_subroot(struct dlm_ctxt *dlm) 1033 { 1034 if (dlm->dlm_debugfs_subroot) 1035 debugfs_remove(dlm->dlm_debugfs_subroot); 1036 } 1037 1038 /* debugfs root */ 1039 int dlm_create_debugfs_root(void) 1040 { 1041 dlm_debugfs_root = debugfs_create_dir(DLM_DEBUGFS_DIR, NULL); 1042 if (!dlm_debugfs_root) { 1043 mlog_errno(-ENOMEM); 1044 return -ENOMEM; 1045 } 1046 return 0; 1047 } 1048 1049 void dlm_destroy_debugfs_root(void) 1050 { 1051 if (dlm_debugfs_root) 1052 debugfs_remove(dlm_debugfs_root); 1053 } 1054 #endif /* CONFIG_DEBUG_FS */ 1055