147 /* should held proc->asts_spin lock */
200 	struct dlm_user_proc *proc;  in dlm_user_add_ast()  local
222 	proc = ua->proc;  in dlm_user_add_ast()
230 	spin_lock(&proc->asts_spin);  in dlm_user_add_ast()
235 		spin_unlock(&proc->asts_spin);  in dlm_user_add_ast()
240 		list_add_tail(&lkb->lkb_cb_list, &proc->asts);  in dlm_user_add_ast()
241 		wake_up_interruptible(&proc->wait);  in dlm_user_add_ast()
249 	spin_unlock(&proc->asts_spin);  in dlm_user_add_ast()
253 		spin_lock(&proc->locks_spin);  in dlm_user_add_ast()
258 		spin_unlock(&proc->locks_spin);  in dlm_user_add_ast()
264 static int device_user_lock(struct dlm_user_proc *proc,  in device_user_lock()  argument
272 	ls = dlm_find_lockspace_local(proc->lockspace);  in device_user_lock()
284 	ua->proc = proc;  in device_user_lock()
315 static int device_user_unlock(struct dlm_user_proc *proc,  in device_user_unlock()  argument
322 	ls = dlm_find_lockspace_local(proc->lockspace);  in device_user_unlock()
329 	ua->proc = proc;  in device_user_unlock()
344 static int device_user_deadlock(struct dlm_user_proc *proc,  in device_user_deadlock()  argument
350 	ls = dlm_find_lockspace_local(proc->lockspace);  in device_user_deadlock()
405 static int device_user_purge(struct dlm_user_proc *proc,  in device_user_purge()  argument
411 	ls = dlm_find_lockspace_local(proc->lockspace);  in device_user_purge()
415 	error = dlm_user_purge(ls, proc, params->nodeid, params->pid);  in device_user_purge()
529 	struct dlm_user_proc *proc = file->private_data;  in device_write()  local
574 		if (proc)  in device_write()
575 			set_bit(DLM_PROC_FLAGS_COMPAT, &proc->flags);  in device_write()
584 	    (proc && test_bit(DLM_PROC_FLAGS_CLOSING, &proc->flags))) {  in device_write()
594 		if (!proc) {  in device_write()
598 		error = device_user_lock(proc, &kbuf->i.lock);  in device_write()
602 		if (!proc) {  in device_write()
606 		error = device_user_unlock(proc, &kbuf->i.lock);  in device_write()
610 		if (!proc) {  in device_write()
614 		error = device_user_deadlock(proc, &kbuf->i.lock);  in device_write()
618 		if (proc) {  in device_write()
626 		if (proc) {  in device_write()
634 		if (!proc) {  in device_write()
638 		error = device_user_purge(proc, &kbuf->i.purge);  in device_write()
651 /* Every process that opens the lockspace device has its own "proc" structure
657 	struct dlm_user_proc *proc;  in device_open()  local
664 	proc = kzalloc(sizeof(struct dlm_user_proc), GFP_NOFS);  in device_open()
665 	if (!proc) {  in device_open()
670 	proc->lockspace = ls->ls_local_handle;  in device_open()
671 	INIT_LIST_HEAD(&proc->asts);  in device_open()
672 	INIT_LIST_HEAD(&proc->locks);  in device_open()
673 	INIT_LIST_HEAD(&proc->unlocking);  in device_open()
674 	spin_lock_init(&proc->asts_spin);  in device_open()
675 	spin_lock_init(&proc->locks_spin);  in device_open()
676 	init_waitqueue_head(&proc->wait);  in device_open()
677 	file->private_data = proc;  in device_open()
684 	struct dlm_user_proc *proc = file->private_data;  in device_close()  local
687 	ls = dlm_find_lockspace_local(proc->lockspace);  in device_close()
691 	set_bit(DLM_PROC_FLAGS_CLOSING, &proc->flags);  in device_close()
693 	dlm_clear_proc_locks(ls, proc);  in device_close()
697 	   looking for lkb->ua->proc */  in device_close()
699 	kfree(proc);  in device_close()
804 	struct dlm_user_proc *proc = file->private_data;  in device_read()  local
815 	if (!proc) {  in device_read()
830 	if (test_bit(DLM_PROC_FLAGS_CLOSING, &proc->flags))  in device_read()
833 	spin_lock(&proc->asts_spin);  in device_read()
834 	if (list_empty(&proc->asts)) {  in device_read()
836 			spin_unlock(&proc->asts_spin);  in device_read()
840 		add_wait_queue(&proc->wait, &wait);  in device_read()
844 		if (list_empty(&proc->asts) && !signal_pending(current)) {  in device_read()
845 			spin_unlock(&proc->asts_spin);  in device_read()
847 			spin_lock(&proc->asts_spin);  in device_read()
851 		remove_wait_queue(&proc->wait, &wait);  in device_read()
854 			spin_unlock(&proc->asts_spin);  in device_read()
863 	lkb = list_first_entry(&proc->asts, struct dlm_lkb, lkb_cb_list);  in device_read()
873 		spin_unlock(&proc->asts_spin);  in device_read()
874 		/* removes ref for proc->asts, may cause lkb to be freed */  in device_read()
888 	spin_unlock(&proc->asts_spin);  in device_read()
899 				  test_bit(DLM_PROC_FLAGS_COMPAT, &proc->flags),  in device_read()
904 	/* removes ref for proc->asts, may cause lkb to be freed */  in device_read()
913 	struct dlm_user_proc *proc = file->private_data;  in device_poll()  local
915 	poll_wait(file, &proc->wait, wait);  in device_poll()
917 	spin_lock(&proc->asts_spin);  in device_poll()
918 	if (!list_empty(&proc->asts)) {  in device_poll()
919 		spin_unlock(&proc->asts_spin);  in device_poll()
922 	spin_unlock(&proc->asts_spin);  in device_poll()