Lines Matching refs:lockres
37 static inline int user_check_wait_flag(struct user_lock_res *lockres,
42 spin_lock(&lockres->l_lock);
43 ret = lockres->l_flags & flag;
44 spin_unlock(&lockres->l_lock);
49 static inline void user_wait_on_busy_lock(struct user_lock_res *lockres)
52 wait_event(lockres->l_event,
53 !user_check_wait_flag(lockres, USER_LOCK_BUSY));
56 static inline void user_wait_on_blocked_lock(struct user_lock_res *lockres)
59 wait_event(lockres->l_event,
60 !user_check_wait_flag(lockres, USER_LOCK_BLOCKED));
65 cluster_connection_from_user_lockres(struct user_lock_res *lockres)
69 ip = container_of(lockres,
76 user_dlm_inode_from_user_lockres(struct user_lock_res *lockres)
80 ip = container_of(lockres,
86 static inline void user_recover_from_dlm_error(struct user_lock_res *lockres)
88 spin_lock(&lockres->l_lock);
89 lockres->l_flags &= ~USER_LOCK_BUSY;
90 spin_unlock(&lockres->l_lock);
115 struct user_lock_res *lockres = user_lksb_to_lock_res(lksb);
118 mlog(ML_BASTS, "AST fired for lockres %.*s, level %d => %d\n",
119 lockres->l_namelen, lockres->l_name, lockres->l_level,
120 lockres->l_requested);
122 spin_lock(&lockres->l_lock);
124 status = ocfs2_dlm_lock_status(&lockres->l_lksb);
126 mlog(ML_ERROR, "lksb status value of %u on lockres %.*s\n",
127 status, lockres->l_namelen, lockres->l_name);
128 spin_unlock(&lockres->l_lock);
132 mlog_bug_on_msg(lockres->l_requested == DLM_LOCK_IV,
134 lockres->l_namelen, lockres->l_name, lockres->l_flags);
137 if (lockres->l_requested < lockres->l_level) {
138 if (lockres->l_requested <=
139 user_highest_compat_lock_level(lockres->l_blocking)) {
140 lockres->l_blocking = DLM_LOCK_NL;
141 lockres->l_flags &= ~USER_LOCK_BLOCKED;
145 lockres->l_level = lockres->l_requested;
146 lockres->l_requested = DLM_LOCK_IV;
147 lockres->l_flags |= USER_LOCK_ATTACHED;
148 lockres->l_flags &= ~USER_LOCK_BUSY;
150 spin_unlock(&lockres->l_lock);
152 wake_up(&lockres->l_event);
155 static inline void user_dlm_grab_inode_ref(struct user_lock_res *lockres)
158 inode = user_dlm_inode_from_user_lockres(lockres);
165 static void __user_dlm_queue_lockres(struct user_lock_res *lockres)
167 if (!(lockres->l_flags & USER_LOCK_QUEUED)) {
168 user_dlm_grab_inode_ref(lockres);
170 INIT_WORK(&lockres->l_work, user_dlm_unblock_lock);
172 queue_work(user_dlm_worker, &lockres->l_work);
173 lockres->l_flags |= USER_LOCK_QUEUED;
177 static void __user_dlm_cond_queue_lockres(struct user_lock_res *lockres)
181 if (!(lockres->l_flags & USER_LOCK_BLOCKED))
184 switch (lockres->l_blocking) {
186 if (!lockres->l_ex_holders && !lockres->l_ro_holders)
190 if (!lockres->l_ex_holders)
198 __user_dlm_queue_lockres(lockres);
203 struct user_lock_res *lockres = user_lksb_to_lock_res(lksb);
205 mlog(ML_BASTS, "BAST fired for lockres %.*s, blocking %d, level %d\n",
206 lockres->l_namelen, lockres->l_name, level, lockres->l_level);
208 spin_lock(&lockres->l_lock);
209 lockres->l_flags |= USER_LOCK_BLOCKED;
210 if (level > lockres->l_blocking)
211 lockres->l_blocking = level;
213 __user_dlm_queue_lockres(lockres);
214 spin_unlock(&lockres->l_lock);
216 wake_up(&lockres->l_event);
221 struct user_lock_res *lockres = user_lksb_to_lock_res(lksb);
223 mlog(ML_BASTS, "UNLOCK AST fired for lockres %.*s, flags 0x%x\n",
224 lockres->l_namelen, lockres->l_name, lockres->l_flags);
229 spin_lock(&lockres->l_lock);
233 if (lockres->l_flags & USER_LOCK_IN_TEARDOWN
234 && !(lockres->l_flags & USER_LOCK_IN_CANCEL)) {
235 lockres->l_level = DLM_LOCK_IV;
240 BUG_ON(!(lockres->l_flags & USER_LOCK_IN_CANCEL));
241 lockres->l_flags &= ~USER_LOCK_IN_CANCEL;
244 BUG_ON(!(lockres->l_flags & USER_LOCK_IN_CANCEL));
246 lockres->l_requested = DLM_LOCK_IV; /* cancel an
249 lockres->l_flags &= ~USER_LOCK_IN_CANCEL;
252 if (lockres->l_flags & USER_LOCK_BLOCKED)
253 __user_dlm_queue_lockres(lockres);
256 lockres->l_flags &= ~USER_LOCK_BUSY;
258 spin_unlock(&lockres->l_lock);
260 wake_up(&lockres->l_event);
278 static inline void user_dlm_drop_inode_ref(struct user_lock_res *lockres)
281 inode = user_dlm_inode_from_user_lockres(lockres);
288 struct user_lock_res *lockres =
291 cluster_connection_from_user_lockres(lockres);
293 mlog(0, "lockres %.*s\n", lockres->l_namelen, lockres->l_name);
295 spin_lock(&lockres->l_lock);
297 mlog_bug_on_msg(!(lockres->l_flags & USER_LOCK_QUEUED),
299 lockres->l_namelen, lockres->l_name, lockres->l_flags);
303 lockres->l_flags &= ~USER_LOCK_QUEUED;
310 if (!(lockres->l_flags & USER_LOCK_BLOCKED)) {
311 mlog(ML_BASTS, "lockres %.*s USER_LOCK_BLOCKED\n",
312 lockres->l_namelen, lockres->l_name);
313 spin_unlock(&lockres->l_lock);
317 if (lockres->l_flags & USER_LOCK_IN_TEARDOWN) {
318 mlog(ML_BASTS, "lockres %.*s USER_LOCK_IN_TEARDOWN\n",
319 lockres->l_namelen, lockres->l_name);
320 spin_unlock(&lockres->l_lock);
324 if (lockres->l_flags & USER_LOCK_BUSY) {
325 if (lockres->l_flags & USER_LOCK_IN_CANCEL) {
326 mlog(ML_BASTS, "lockres %.*s USER_LOCK_IN_CANCEL\n",
327 lockres->l_namelen, lockres->l_name);
328 spin_unlock(&lockres->l_lock);
332 lockres->l_flags |= USER_LOCK_IN_CANCEL;
333 spin_unlock(&lockres->l_lock);
335 status = ocfs2_dlm_unlock(conn, &lockres->l_lksb,
338 user_log_dlm_error("ocfs2_dlm_unlock", status, lockres);
345 if ((lockres->l_blocking == DLM_LOCK_EX)
346 && (lockres->l_ex_holders || lockres->l_ro_holders)) {
347 spin_unlock(&lockres->l_lock);
348 mlog(ML_BASTS, "lockres %.*s, EX/PR Holders %u,%u\n",
349 lockres->l_namelen, lockres->l_name,
350 lockres->l_ex_holders, lockres->l_ro_holders);
354 if ((lockres->l_blocking == DLM_LOCK_PR)
355 && lockres->l_ex_holders) {
356 spin_unlock(&lockres->l_lock);
357 mlog(ML_BASTS, "lockres %.*s, EX Holders %u\n",
358 lockres->l_namelen, lockres->l_name,
359 lockres->l_ex_holders);
364 new_level = user_highest_compat_lock_level(lockres->l_blocking);
365 lockres->l_requested = new_level;
366 lockres->l_flags |= USER_LOCK_BUSY;
367 mlog(ML_BASTS, "lockres %.*s, downconvert %d => %d\n",
368 lockres->l_namelen, lockres->l_name, lockres->l_level, new_level);
369 spin_unlock(&lockres->l_lock);
372 status = ocfs2_dlm_lock(conn, new_level, &lockres->l_lksb,
374 lockres->l_name,
375 lockres->l_namelen);
377 user_log_dlm_error("ocfs2_dlm_lock", status, lockres);
378 user_recover_from_dlm_error(lockres);
382 user_dlm_drop_inode_ref(lockres);
385 static inline void user_dlm_inc_holders(struct user_lock_res *lockres,
390 lockres->l_ex_holders++;
393 lockres->l_ro_holders++;
404 user_may_continue_on_blocked_lock(struct user_lock_res *lockres,
407 BUG_ON(!(lockres->l_flags & USER_LOCK_BLOCKED));
409 return wanted <= user_highest_compat_lock_level(lockres->l_blocking);
412 int user_dlm_cluster_lock(struct user_lock_res *lockres,
418 cluster_connection_from_user_lockres(lockres);
422 mlog(ML_ERROR, "lockres %.*s: invalid request!\n",
423 lockres->l_namelen, lockres->l_name);
428 mlog(ML_BASTS, "lockres %.*s, level %d, flags = 0x%x\n",
429 lockres->l_namelen, lockres->l_name, level, lkm_flags);
437 spin_lock(&lockres->l_lock);
438 if (lockres->l_flags & USER_LOCK_IN_TEARDOWN) {
439 spin_unlock(&lockres->l_lock);
447 if ((lockres->l_flags & USER_LOCK_BUSY) &&
448 (level > lockres->l_level)) {
451 spin_unlock(&lockres->l_lock);
453 user_wait_on_busy_lock(lockres);
457 if ((lockres->l_flags & USER_LOCK_BLOCKED) &&
458 (!user_may_continue_on_blocked_lock(lockres, level))) {
461 spin_unlock(&lockres->l_lock);
463 user_wait_on_blocked_lock(lockres);
467 if (level > lockres->l_level) {
469 if (lockres->l_level != DLM_LOCK_IV)
472 lockres->l_requested = level;
473 lockres->l_flags |= USER_LOCK_BUSY;
474 spin_unlock(&lockres->l_lock);
480 status = ocfs2_dlm_lock(conn, level, &lockres->l_lksb,
481 local_flags, lockres->l_name,
482 lockres->l_namelen);
487 status, lockres);
488 user_recover_from_dlm_error(lockres);
492 user_wait_on_busy_lock(lockres);
496 user_dlm_inc_holders(lockres, level);
497 spin_unlock(&lockres->l_lock);
504 static inline void user_dlm_dec_holders(struct user_lock_res *lockres,
509 BUG_ON(!lockres->l_ex_holders);
510 lockres->l_ex_holders--;
513 BUG_ON(!lockres->l_ro_holders);
514 lockres->l_ro_holders--;
521 void user_dlm_cluster_unlock(struct user_lock_res *lockres,
526 mlog(ML_ERROR, "lockres %.*s: invalid request!\n",
527 lockres->l_namelen, lockres->l_name);
531 spin_lock(&lockres->l_lock);
532 user_dlm_dec_holders(lockres, level);
533 __user_dlm_cond_queue_lockres(lockres);
534 spin_unlock(&lockres->l_lock);
541 struct user_lock_res *lockres = &DLMFS_I(inode)->ip_lockres;
546 spin_lock(&lockres->l_lock);
548 BUG_ON(lockres->l_level < DLM_LOCK_EX);
549 lvb = ocfs2_dlm_lvb(&lockres->l_lksb);
552 spin_unlock(&lockres->l_lock);
557 struct user_lock_res *lockres = &DLMFS_I(inode)->ip_lockres;
561 spin_lock(&lockres->l_lock);
563 BUG_ON(lockres->l_level < DLM_LOCK_PR);
564 if (ocfs2_dlm_lvb_valid(&lockres->l_lksb)) {
565 lvb = ocfs2_dlm_lvb(&lockres->l_lksb);
570 spin_unlock(&lockres->l_lock);
574 void user_dlm_lock_res_init(struct user_lock_res *lockres,
577 memset(lockres, 0, sizeof(*lockres));
579 spin_lock_init(&lockres->l_lock);
580 init_waitqueue_head(&lockres->l_event);
581 lockres->l_level = DLM_LOCK_IV;
582 lockres->l_requested = DLM_LOCK_IV;
583 lockres->l_blocking = DLM_LOCK_IV;
588 memcpy(lockres->l_name,
591 lockres->l_namelen = dentry->d_name.len;
594 int user_dlm_destroy_lock(struct user_lock_res *lockres)
598 cluster_connection_from_user_lockres(lockres);
600 mlog(ML_BASTS, "lockres %.*s\n", lockres->l_namelen, lockres->l_name);
602 spin_lock(&lockres->l_lock);
603 if (lockres->l_flags & USER_LOCK_IN_TEARDOWN) {
604 spin_unlock(&lockres->l_lock);
608 lockres->l_flags |= USER_LOCK_IN_TEARDOWN;
610 while (lockres->l_flags & USER_LOCK_BUSY) {
611 spin_unlock(&lockres->l_lock);
613 user_wait_on_busy_lock(lockres);
615 spin_lock(&lockres->l_lock);
618 if (lockres->l_ro_holders || lockres->l_ex_holders) {
619 lockres->l_flags &= ~USER_LOCK_IN_TEARDOWN;
620 spin_unlock(&lockres->l_lock);
625 if (!(lockres->l_flags & USER_LOCK_ATTACHED)) {
630 spin_unlock(&lockres->l_lock);
634 lockres->l_flags &= ~USER_LOCK_ATTACHED;
635 lockres->l_flags |= USER_LOCK_BUSY;
636 spin_unlock(&lockres->l_lock);
638 status = ocfs2_dlm_unlock(conn, &lockres->l_lksb, DLM_LKF_VALBLK);
640 spin_lock(&lockres->l_lock);
641 lockres->l_flags &= ~USER_LOCK_IN_TEARDOWN;
642 lockres->l_flags &= ~USER_LOCK_BUSY;
643 spin_unlock(&lockres->l_lock);
644 user_log_dlm_error("ocfs2_dlm_unlock", status, lockres);
648 user_wait_on_busy_lock(lockres);