27 void autofs4_catatonic_mode(struct autofs_sb_info *sbi)  in autofs4_catatonic_mode()  argument
31 	mutex_lock(&sbi->wq_mutex);  in autofs4_catatonic_mode()
32 	if (sbi->catatonic) {  in autofs4_catatonic_mode()
33 		mutex_unlock(&sbi->wq_mutex);  in autofs4_catatonic_mode()
39 	sbi->catatonic = 1;  in autofs4_catatonic_mode()
40 	wq = sbi->queues;  in autofs4_catatonic_mode()
41 	sbi->queues = NULL;	/* Erase all wait queues */  in autofs4_catatonic_mode()
51 	fput(sbi->pipe);	/* Close the pipe */  in autofs4_catatonic_mode()
52 	sbi->pipe = NULL;  in autofs4_catatonic_mode()
53 	sbi->pipefd = -1;  in autofs4_catatonic_mode()
54 	mutex_unlock(&sbi->wq_mutex);  in autofs4_catatonic_mode()
57 static int autofs4_write(struct autofs_sb_info *sbi,  in autofs4_write()  argument
71 	mutex_lock(&sbi->pipe_mutex);  in autofs4_write()
77 	mutex_unlock(&sbi->pipe_mutex);  in autofs4_write()
93 static void autofs4_notify_daemon(struct autofs_sb_info *sbi,  in autofs4_notify_daemon()  argument
110 	pkt.hdr.proto_version = sbi->version;  in autofs4_notify_daemon()
149 		struct user_namespace *user_ns = sbi->pipe->f_cred->user_ns;  in autofs4_notify_daemon()
167 		mutex_unlock(&sbi->wq_mutex);  in autofs4_notify_daemon()
171 	pipe = get_file(sbi->pipe);  in autofs4_notify_daemon()
173 	mutex_unlock(&sbi->wq_mutex);  in autofs4_notify_daemon()
175 	if (autofs4_write(sbi, pipe, &pkt, pktsz))  in autofs4_notify_daemon()
176 		autofs4_catatonic_mode(sbi);  in autofs4_notify_daemon()
180 static int autofs4_getpath(struct autofs_sb_info *sbi,  in autofs4_getpath()  argument
183 	struct dentry *root = sbi->sb->s_root;  in autofs4_getpath()
196 	spin_lock(&sbi->fs_lock);  in autofs4_getpath()
201 		spin_unlock(&sbi->fs_lock);  in autofs4_getpath()
217 	spin_unlock(&sbi->fs_lock);  in autofs4_getpath()
226 autofs4_find_wait(struct autofs_sb_info *sbi, struct qstr *qstr)  in autofs4_find_wait()  argument
230 	for (wq = sbi->queues; wq; wq = wq->next) {  in autofs4_find_wait()
249 			    struct autofs_sb_info *sbi,  in validate_request()  argument
256 	if (sbi->catatonic)  in validate_request()
260 	wq = autofs4_find_wait(sbi, qstr);  in validate_request()
286 			mutex_unlock(&sbi->wq_mutex);  in validate_request()
288 			if (mutex_lock_interruptible(&sbi->wq_mutex))  in validate_request()
291 			if (sbi->catatonic)  in validate_request()
294 			wq = autofs4_find_wait(sbi, qstr);  in validate_request()
343 int autofs4_wait(struct autofs_sb_info *sbi, struct dentry *dentry,  in autofs4_wait()  argument
354 	if (sbi->catatonic)  in autofs4_wait()
362 	pid = task_pid_nr_ns(current, ns_of_pid(sbi->oz_pgrp));  in autofs4_wait()
363 	tgid = task_tgid_nr_ns(current, ns_of_pid(sbi->oz_pgrp));  in autofs4_wait()
376 		if (autofs_type_trigger(sbi->type))  in autofs4_wait()
387 	if (IS_ROOT(dentry) && autofs_type_trigger(sbi->type))  in autofs4_wait()
390 		qstr.len = autofs4_getpath(sbi, dentry, &name);  in autofs4_wait()
399 	if (mutex_lock_interruptible(&sbi->wq_mutex)) {  in autofs4_wait()
404 	ret = validate_request(&wq, sbi, &qstr, dentry, notify);  in autofs4_wait()
407 			mutex_unlock(&sbi->wq_mutex);  in autofs4_wait()
417 			mutex_unlock(&sbi->wq_mutex);  in autofs4_wait()
424 		wq->next = sbi->queues;  in autofs4_wait()
425 		sbi->queues = wq;  in autofs4_wait()
428 		wq->dev = autofs4_get_dev(sbi);  in autofs4_wait()
429 		wq->ino = autofs4_get_ino(sbi);  in autofs4_wait()
437 		if (sbi->version < 5) {  in autofs4_wait()
444 				type = autofs_type_trigger(sbi->type) ?  in autofs4_wait()
448 				type = autofs_type_trigger(sbi->type) ?  in autofs4_wait()
458 		autofs4_notify_daemon(sbi, wq, type);  in autofs4_wait()
464 		mutex_unlock(&sbi->wq_mutex);  in autofs4_wait()
519 			spin_lock(&sbi->fs_lock);  in autofs4_wait()
522 			spin_unlock(&sbi->fs_lock);  in autofs4_wait()
530 	mutex_lock(&sbi->wq_mutex);  in autofs4_wait()
533 	mutex_unlock(&sbi->wq_mutex);  in autofs4_wait()
539 int autofs4_wait_release(struct autofs_sb_info *sbi, autofs_wqt_t wait_queue_token, int status)  in autofs4_wait_release()  argument
543 	mutex_lock(&sbi->wq_mutex);  in autofs4_wait_release()
544 	for (wql = &sbi->queues; (wq = *wql) != NULL; wql = &wq->next) {  in autofs4_wait_release()
550 		mutex_unlock(&sbi->wq_mutex);  in autofs4_wait_release()
561 	mutex_unlock(&sbi->wq_mutex);  in autofs4_wait_release()