Lines Matching refs:lockres
35 static inline int user_check_wait_flag(struct user_lock_res *lockres,
40 spin_lock(&lockres->l_lock);
41 ret = lockres->l_flags & flag;
42 spin_unlock(&lockres->l_lock);
47 static inline void user_wait_on_busy_lock(struct user_lock_res *lockres)
50 wait_event(lockres->l_event,
51 !user_check_wait_flag(lockres, USER_LOCK_BUSY));
54 static inline void user_wait_on_blocked_lock(struct user_lock_res *lockres)
57 wait_event(lockres->l_event,
58 !user_check_wait_flag(lockres, USER_LOCK_BLOCKED));
63 cluster_connection_from_user_lockres(struct user_lock_res *lockres)
67 ip = container_of(lockres,
74 user_dlm_inode_from_user_lockres(struct user_lock_res *lockres)
78 ip = container_of(lockres,
84 static inline void user_recover_from_dlm_error(struct user_lock_res *lockres)
86 spin_lock(&lockres->l_lock);
87 lockres->l_flags &= ~USER_LOCK_BUSY;
88 spin_unlock(&lockres->l_lock);
113 struct user_lock_res *lockres = user_lksb_to_lock_res(lksb);
116 mlog(ML_BASTS, "AST fired for lockres %.*s, level %d => %d\n",
117 lockres->l_namelen, lockres->l_name, lockres->l_level,
118 lockres->l_requested);
120 spin_lock(&lockres->l_lock);
122 status = ocfs2_dlm_lock_status(&lockres->l_lksb);
124 mlog(ML_ERROR, "lksb status value of %u on lockres %.*s\n",
125 status, lockres->l_namelen, lockres->l_name);
126 spin_unlock(&lockres->l_lock);
130 mlog_bug_on_msg(lockres->l_requested == DLM_LOCK_IV,
132 lockres->l_namelen, lockres->l_name, lockres->l_flags);
135 if (lockres->l_requested < lockres->l_level) {
136 if (lockres->l_requested <=
137 user_highest_compat_lock_level(lockres->l_blocking)) {
138 lockres->l_blocking = DLM_LOCK_NL;
139 lockres->l_flags &= ~USER_LOCK_BLOCKED;
143 lockres->l_level = lockres->l_requested;
144 lockres->l_requested = DLM_LOCK_IV;
145 lockres->l_flags |= USER_LOCK_ATTACHED;
146 lockres->l_flags &= ~USER_LOCK_BUSY;
148 spin_unlock(&lockres->l_lock);
150 wake_up(&lockres->l_event);
153 static inline void user_dlm_grab_inode_ref(struct user_lock_res *lockres)
156 inode = user_dlm_inode_from_user_lockres(lockres);
163 static void __user_dlm_queue_lockres(struct user_lock_res *lockres)
165 if (!(lockres->l_flags & USER_LOCK_QUEUED)) {
166 user_dlm_grab_inode_ref(lockres);
168 INIT_WORK(&lockres->l_work, user_dlm_unblock_lock);
170 queue_work(user_dlm_worker, &lockres->l_work);
171 lockres->l_flags |= USER_LOCK_QUEUED;
175 static void __user_dlm_cond_queue_lockres(struct user_lock_res *lockres)
179 if (!(lockres->l_flags & USER_LOCK_BLOCKED))
182 switch (lockres->l_blocking) {
184 if (!lockres->l_ex_holders && !lockres->l_ro_holders)
188 if (!lockres->l_ex_holders)
196 __user_dlm_queue_lockres(lockres);
201 struct user_lock_res *lockres = user_lksb_to_lock_res(lksb);
203 mlog(ML_BASTS, "BAST fired for lockres %.*s, blocking %d, level %d\n",
204 lockres->l_namelen, lockres->l_name, level, lockres->l_level);
206 spin_lock(&lockres->l_lock);
207 lockres->l_flags |= USER_LOCK_BLOCKED;
208 if (level > lockres->l_blocking)
209 lockres->l_blocking = level;
211 __user_dlm_queue_lockres(lockres);
212 spin_unlock(&lockres->l_lock);
214 wake_up(&lockres->l_event);
219 struct user_lock_res *lockres = user_lksb_to_lock_res(lksb);
221 mlog(ML_BASTS, "UNLOCK AST fired for lockres %.*s, flags 0x%x\n",
222 lockres->l_namelen, lockres->l_name, lockres->l_flags);
227 spin_lock(&lockres->l_lock);
231 if (lockres->l_flags & USER_LOCK_IN_TEARDOWN
232 && !(lockres->l_flags & USER_LOCK_IN_CANCEL)) {
233 lockres->l_level = DLM_LOCK_IV;
238 BUG_ON(!(lockres->l_flags & USER_LOCK_IN_CANCEL));
239 lockres->l_flags &= ~USER_LOCK_IN_CANCEL;
242 BUG_ON(!(lockres->l_flags & USER_LOCK_IN_CANCEL));
244 lockres->l_requested = DLM_LOCK_IV; /* cancel an
247 lockres->l_flags &= ~USER_LOCK_IN_CANCEL;
250 if (lockres->l_flags & USER_LOCK_BLOCKED)
251 __user_dlm_queue_lockres(lockres);
254 lockres->l_flags &= ~USER_LOCK_BUSY;
256 spin_unlock(&lockres->l_lock);
258 wake_up(&lockres->l_event);
276 static inline void user_dlm_drop_inode_ref(struct user_lock_res *lockres)
279 inode = user_dlm_inode_from_user_lockres(lockres);
286 struct user_lock_res *lockres =
289 cluster_connection_from_user_lockres(lockres);
291 mlog(0, "lockres %.*s\n", lockres->l_namelen, lockres->l_name);
293 spin_lock(&lockres->l_lock);
295 mlog_bug_on_msg(!(lockres->l_flags & USER_LOCK_QUEUED),
297 lockres->l_namelen, lockres->l_name, lockres->l_flags);
301 lockres->l_flags &= ~USER_LOCK_QUEUED;
308 if (!(lockres->l_flags & USER_LOCK_BLOCKED)) {
309 mlog(ML_BASTS, "lockres %.*s USER_LOCK_BLOCKED\n",
310 lockres->l_namelen, lockres->l_name);
311 spin_unlock(&lockres->l_lock);
315 if (lockres->l_flags & USER_LOCK_IN_TEARDOWN) {
316 mlog(ML_BASTS, "lockres %.*s USER_LOCK_IN_TEARDOWN\n",
317 lockres->l_namelen, lockres->l_name);
318 spin_unlock(&lockres->l_lock);
322 if (lockres->l_flags & USER_LOCK_BUSY) {
323 if (lockres->l_flags & USER_LOCK_IN_CANCEL) {
324 mlog(ML_BASTS, "lockres %.*s USER_LOCK_IN_CANCEL\n",
325 lockres->l_namelen, lockres->l_name);
326 spin_unlock(&lockres->l_lock);
330 lockres->l_flags |= USER_LOCK_IN_CANCEL;
331 spin_unlock(&lockres->l_lock);
333 status = ocfs2_dlm_unlock(conn, &lockres->l_lksb,
336 user_log_dlm_error("ocfs2_dlm_unlock", status, lockres);
343 if ((lockres->l_blocking == DLM_LOCK_EX)
344 && (lockres->l_ex_holders || lockres->l_ro_holders)) {
345 spin_unlock(&lockres->l_lock);
346 mlog(ML_BASTS, "lockres %.*s, EX/PR Holders %u,%u\n",
347 lockres->l_namelen, lockres->l_name,
348 lockres->l_ex_holders, lockres->l_ro_holders);
352 if ((lockres->l_blocking == DLM_LOCK_PR)
353 && lockres->l_ex_holders) {
354 spin_unlock(&lockres->l_lock);
355 mlog(ML_BASTS, "lockres %.*s, EX Holders %u\n",
356 lockres->l_namelen, lockres->l_name,
357 lockres->l_ex_holders);
362 new_level = user_highest_compat_lock_level(lockres->l_blocking);
363 lockres->l_requested = new_level;
364 lockres->l_flags |= USER_LOCK_BUSY;
365 mlog(ML_BASTS, "lockres %.*s, downconvert %d => %d\n",
366 lockres->l_namelen, lockres->l_name, lockres->l_level, new_level);
367 spin_unlock(&lockres->l_lock);
370 status = ocfs2_dlm_lock(conn, new_level, &lockres->l_lksb,
372 lockres->l_name,
373 lockres->l_namelen);
375 user_log_dlm_error("ocfs2_dlm_lock", status, lockres);
376 user_recover_from_dlm_error(lockres);
380 user_dlm_drop_inode_ref(lockres);
383 static inline void user_dlm_inc_holders(struct user_lock_res *lockres,
388 lockres->l_ex_holders++;
391 lockres->l_ro_holders++;
402 user_may_continue_on_blocked_lock(struct user_lock_res *lockres,
405 BUG_ON(!(lockres->l_flags & USER_LOCK_BLOCKED));
407 return wanted <= user_highest_compat_lock_level(lockres->l_blocking);
410 int user_dlm_cluster_lock(struct user_lock_res *lockres,
416 cluster_connection_from_user_lockres(lockres);
420 mlog(ML_ERROR, "lockres %.*s: invalid request!\n",
421 lockres->l_namelen, lockres->l_name);
426 mlog(ML_BASTS, "lockres %.*s, level %d, flags = 0x%x\n",
427 lockres->l_namelen, lockres->l_name, level, lkm_flags);
435 spin_lock(&lockres->l_lock);
436 if (lockres->l_flags & USER_LOCK_IN_TEARDOWN) {
437 spin_unlock(&lockres->l_lock);
445 if ((lockres->l_flags & USER_LOCK_BUSY) &&
446 (level > lockres->l_level)) {
449 spin_unlock(&lockres->l_lock);
451 user_wait_on_busy_lock(lockres);
455 if ((lockres->l_flags & USER_LOCK_BLOCKED) &&
456 (!user_may_continue_on_blocked_lock(lockres, level))) {
459 spin_unlock(&lockres->l_lock);
461 user_wait_on_blocked_lock(lockres);
465 if (level > lockres->l_level) {
467 if (lockres->l_level != DLM_LOCK_IV)
470 lockres->l_requested = level;
471 lockres->l_flags |= USER_LOCK_BUSY;
472 spin_unlock(&lockres->l_lock);
478 status = ocfs2_dlm_lock(conn, level, &lockres->l_lksb,
479 local_flags, lockres->l_name,
480 lockres->l_namelen);
485 status, lockres);
486 user_recover_from_dlm_error(lockres);
490 user_wait_on_busy_lock(lockres);
494 user_dlm_inc_holders(lockres, level);
495 spin_unlock(&lockres->l_lock);
502 static inline void user_dlm_dec_holders(struct user_lock_res *lockres,
507 BUG_ON(!lockres->l_ex_holders);
508 lockres->l_ex_holders--;
511 BUG_ON(!lockres->l_ro_holders);
512 lockres->l_ro_holders--;
519 void user_dlm_cluster_unlock(struct user_lock_res *lockres,
524 mlog(ML_ERROR, "lockres %.*s: invalid request!\n",
525 lockres->l_namelen, lockres->l_name);
529 spin_lock(&lockres->l_lock);
530 user_dlm_dec_holders(lockres, level);
531 __user_dlm_cond_queue_lockres(lockres);
532 spin_unlock(&lockres->l_lock);
539 struct user_lock_res *lockres = &DLMFS_I(inode)->ip_lockres;
544 spin_lock(&lockres->l_lock);
546 BUG_ON(lockres->l_level < DLM_LOCK_EX);
547 lvb = ocfs2_dlm_lvb(&lockres->l_lksb);
550 spin_unlock(&lockres->l_lock);
555 struct user_lock_res *lockres = &DLMFS_I(inode)->ip_lockres;
559 spin_lock(&lockres->l_lock);
561 BUG_ON(lockres->l_level < DLM_LOCK_PR);
562 if (ocfs2_dlm_lvb_valid(&lockres->l_lksb)) {
563 lvb = ocfs2_dlm_lvb(&lockres->l_lksb);
568 spin_unlock(&lockres->l_lock);
572 void user_dlm_lock_res_init(struct user_lock_res *lockres,
575 memset(lockres, 0, sizeof(*lockres));
577 spin_lock_init(&lockres->l_lock);
578 init_waitqueue_head(&lockres->l_event);
579 lockres->l_level = DLM_LOCK_IV;
580 lockres->l_requested = DLM_LOCK_IV;
581 lockres->l_blocking = DLM_LOCK_IV;
586 memcpy(lockres->l_name,
589 lockres->l_namelen = dentry->d_name.len;
592 int user_dlm_destroy_lock(struct user_lock_res *lockres)
596 cluster_connection_from_user_lockres(lockres);
598 mlog(ML_BASTS, "lockres %.*s\n", lockres->l_namelen, lockres->l_name);
600 spin_lock(&lockres->l_lock);
601 if (lockres->l_flags & USER_LOCK_IN_TEARDOWN) {
602 spin_unlock(&lockres->l_lock);
606 lockres->l_flags |= USER_LOCK_IN_TEARDOWN;
608 while (lockres->l_flags & USER_LOCK_BUSY) {
609 spin_unlock(&lockres->l_lock);
611 user_wait_on_busy_lock(lockres);
613 spin_lock(&lockres->l_lock);
616 if (lockres->l_ro_holders || lockres->l_ex_holders) {
617 lockres->l_flags &= ~USER_LOCK_IN_TEARDOWN;
618 spin_unlock(&lockres->l_lock);
623 if (!(lockres->l_flags & USER_LOCK_ATTACHED)) {
628 spin_unlock(&lockres->l_lock);
632 lockres->l_flags |= USER_LOCK_BUSY;
633 spin_unlock(&lockres->l_lock);
635 status = ocfs2_dlm_unlock(conn, &lockres->l_lksb, DLM_LKF_VALBLK);
637 spin_lock(&lockres->l_lock);
638 lockres->l_flags &= ~USER_LOCK_IN_TEARDOWN;
639 lockres->l_flags &= ~USER_LOCK_BUSY;
640 spin_unlock(&lockres->l_lock);
641 user_log_dlm_error("ocfs2_dlm_unlock", status, lockres);
645 user_wait_on_busy_lock(lockres);