31 	struct ecryptfs_daemon *daemon = file->private_data;  in ecryptfs_miscdev_poll()  local
34 	mutex_lock(&daemon->mux);  in ecryptfs_miscdev_poll()
35 	if (daemon->flags & ECRYPTFS_DAEMON_ZOMBIE) {  in ecryptfs_miscdev_poll()
37 		       "daemon\n", __func__);  in ecryptfs_miscdev_poll()
40 	if (daemon->flags & ECRYPTFS_DAEMON_IN_READ)  in ecryptfs_miscdev_poll()
42 	if (daemon->flags & ECRYPTFS_DAEMON_IN_POLL)  in ecryptfs_miscdev_poll()
44 	daemon->flags |= ECRYPTFS_DAEMON_IN_POLL;  in ecryptfs_miscdev_poll()
45 	mutex_unlock(&daemon->mux);  in ecryptfs_miscdev_poll()
46 	poll_wait(file, &daemon->wait, pt);  in ecryptfs_miscdev_poll()
47 	mutex_lock(&daemon->mux);  in ecryptfs_miscdev_poll()
48 	if (!list_empty(&daemon->msg_ctx_out_queue))  in ecryptfs_miscdev_poll()
51 	daemon->flags &= ~ECRYPTFS_DAEMON_IN_POLL;  in ecryptfs_miscdev_poll()
52 	mutex_unlock(&daemon->mux);  in ecryptfs_miscdev_poll()
66 	struct ecryptfs_daemon *daemon = NULL;  in ecryptfs_miscdev_open()  local
70 	rc = ecryptfs_find_daemon_by_euid(&daemon);  in ecryptfs_miscdev_open()
75 	rc = ecryptfs_spawn_daemon(&daemon, file);  in ecryptfs_miscdev_open()
77 		printk(KERN_ERR "%s: Error attempting to spawn daemon; "  in ecryptfs_miscdev_open()
81 	mutex_lock(&daemon->mux);  in ecryptfs_miscdev_open()
82 	if (daemon->flags & ECRYPTFS_DAEMON_MISCDEV_OPEN) {  in ecryptfs_miscdev_open()
86 	daemon->flags |= ECRYPTFS_DAEMON_MISCDEV_OPEN;  in ecryptfs_miscdev_open()
87 	file->private_data = daemon;  in ecryptfs_miscdev_open()
90 	mutex_unlock(&daemon->mux);  in ecryptfs_miscdev_open()
101  * This keeps the daemon registered until the daemon sends another
109 	struct ecryptfs_daemon *daemon = file->private_data;  in ecryptfs_miscdev_release()  local
112 	mutex_lock(&daemon->mux);  in ecryptfs_miscdev_release()
113 	BUG_ON(!(daemon->flags & ECRYPTFS_DAEMON_MISCDEV_OPEN));  in ecryptfs_miscdev_release()
114 	daemon->flags &= ~ECRYPTFS_DAEMON_MISCDEV_OPEN;  in ecryptfs_miscdev_release()
116 	mutex_unlock(&daemon->mux);  in ecryptfs_miscdev_release()
119 	rc = ecryptfs_exorcise_daemon(daemon);  in ecryptfs_miscdev_release()
123 		       "shut down daemon; rc = [%d]. Please report this "  in ecryptfs_miscdev_release()
132  * @data: Data to send to daemon; may be NULL
133  * @data_size: Amount of data to send to daemon
138  * @daemon: eCryptfs daemon object
148 			  u16 msg_flags, struct ecryptfs_daemon *daemon)  in ecryptfs_send_miscdev()  argument
163 	list_add_tail(&msg_ctx->daemon_out_list, &daemon->msg_ctx_out_queue);  in ecryptfs_send_miscdev()
166 	mutex_lock(&daemon->mux);  in ecryptfs_send_miscdev()
167 	daemon->num_queued_msg_ctx++;  in ecryptfs_send_miscdev()
168 	wake_up_interruptible(&daemon->wait);  in ecryptfs_send_miscdev()
169 	mutex_unlock(&daemon->mux);  in ecryptfs_send_miscdev()
200  * @buf: User buffer into which to copy the next message on the daemon queue
204  * Pulls the most recent message from the daemon queue, formats it for
213 	struct ecryptfs_daemon *daemon = file->private_data;  in ecryptfs_miscdev_read()  local
221 	mutex_lock(&daemon->mux);  in ecryptfs_miscdev_read()
222 	if (daemon->flags & ECRYPTFS_DAEMON_ZOMBIE) {  in ecryptfs_miscdev_read()
225 		       "daemon\n", __func__);  in ecryptfs_miscdev_read()
228 	if (daemon->flags & ECRYPTFS_DAEMON_IN_READ) {  in ecryptfs_miscdev_read()
232 	/* This daemon will not go away so long as this flag is set */  in ecryptfs_miscdev_read()
233 	daemon->flags |= ECRYPTFS_DAEMON_IN_READ;  in ecryptfs_miscdev_read()
235 	if (list_empty(&daemon->msg_ctx_out_queue)) {  in ecryptfs_miscdev_read()
236 		mutex_unlock(&daemon->mux);  in ecryptfs_miscdev_read()
238 			daemon->wait, !list_empty(&daemon->msg_ctx_out_queue));  in ecryptfs_miscdev_read()
239 		mutex_lock(&daemon->mux);  in ecryptfs_miscdev_read()
245 	if (daemon->flags & ECRYPTFS_DAEMON_ZOMBIE) {  in ecryptfs_miscdev_read()
249 	if (list_empty(&daemon->msg_ctx_out_queue)) {  in ecryptfs_miscdev_read()
255 	msg_ctx = list_first_entry(&daemon->msg_ctx_out_queue,  in ecryptfs_miscdev_read()
301 	/* We do not expect a reply from the userspace daemon for any  in ecryptfs_miscdev_read()
308 	daemon->flags &= ~ECRYPTFS_DAEMON_IN_READ;  in ecryptfs_miscdev_read()
309 	mutex_unlock(&daemon->mux);  in ecryptfs_miscdev_read()
314  * ecryptfs_miscdev_response - miscdevess response to message previously sent to daemon
315  * @daemon: eCryptfs daemon object
322 static int ecryptfs_miscdev_response(struct ecryptfs_daemon *daemon, char *data,  in ecryptfs_miscdev_response()  argument
335 	rc = ecryptfs_process_response(daemon, msg, seq);  in ecryptfs_miscdev_response()
344  * ecryptfs_miscdev_write - handle write to daemon miscdev handle
465  * Messages sent to the userspace daemon from the kernel are placed on
466  * a queue associated with the daemon. The next read against the
467  * miscdev handle by that daemon will return the oldest message placed
468  * on the message queue for the daemon.