2 * eCryptfs: Linux filesystem encryption layer
4 * Copyright (C) 2004-2008 International Business Machines Corp.
5 * Author(s): Michael A. Halcrow <mhalcrow@us.ibm.com>
6 * Tyler Hicks <tyhicks@ou.edu>
8 * This program is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU General Public License version
10 * 2 as published by the Free Software Foundation.
12 * This program is distributed in the hope that it will be useful, but
13 * WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * General Public License for more details.
17 * You should have received a copy of the GNU General Public License
18 * along with this program; if not, write to the Free Software
19 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
22 #include <linux/sched.h>
23 #include "ecryptfs_kernel.h"
25 static LIST_HEAD(ecryptfs_msg_ctx_free_list
);
26 static LIST_HEAD(ecryptfs_msg_ctx_alloc_list
);
27 static struct mutex ecryptfs_msg_ctx_lists_mux
;
29 static struct hlist_head
*ecryptfs_daemon_hash
;
30 struct mutex ecryptfs_daemon_hash_mux
;
31 static int ecryptfs_hash_buckets
;
32 #define ecryptfs_uid_hash(uid) \
33 hash_long((unsigned long)uid, ecryptfs_hash_buckets)
35 static u32 ecryptfs_msg_counter
;
36 static struct ecryptfs_msg_ctx
*ecryptfs_msg_ctx_arr
;
39 * ecryptfs_acquire_free_msg_ctx
40 * @msg_ctx: The context that was acquired from the free list
42 * Acquires a context element from the free list and locks the mutex
43 * on the context. Sets the msg_ctx task to current. Returns zero on
44 * success; non-zero on error or upon failure to acquire a free
45 * context element. Must be called with ecryptfs_msg_ctx_lists_mux
48 static int ecryptfs_acquire_free_msg_ctx(struct ecryptfs_msg_ctx
**msg_ctx
)
53 if (list_empty(&ecryptfs_msg_ctx_free_list
)) {
54 printk(KERN_WARNING
"%s: The eCryptfs free "
55 "context list is empty. It may be helpful to "
56 "specify the ecryptfs_message_buf_len "
57 "parameter to be greater than the current "
58 "value of [%d]\n", __func__
, ecryptfs_message_buf_len
);
62 list_for_each(p
, &ecryptfs_msg_ctx_free_list
) {
63 *msg_ctx
= list_entry(p
, struct ecryptfs_msg_ctx
, node
);
64 if (mutex_trylock(&(*msg_ctx
)->mux
)) {
65 (*msg_ctx
)->task
= current
;
76 * ecryptfs_msg_ctx_free_to_alloc
77 * @msg_ctx: The context to move from the free list to the alloc list
79 * Must be called with ecryptfs_msg_ctx_lists_mux held.
81 static void ecryptfs_msg_ctx_free_to_alloc(struct ecryptfs_msg_ctx
*msg_ctx
)
83 list_move(&msg_ctx
->node
, &ecryptfs_msg_ctx_alloc_list
);
84 msg_ctx
->state
= ECRYPTFS_MSG_CTX_STATE_PENDING
;
85 msg_ctx
->counter
= ++ecryptfs_msg_counter
;
89 * ecryptfs_msg_ctx_alloc_to_free
90 * @msg_ctx: The context to move from the alloc list to the free list
92 * Must be called with ecryptfs_msg_ctx_lists_mux held.
94 void ecryptfs_msg_ctx_alloc_to_free(struct ecryptfs_msg_ctx
*msg_ctx
)
96 list_move(&(msg_ctx
->node
), &ecryptfs_msg_ctx_free_list
);
100 msg_ctx
->state
= ECRYPTFS_MSG_CTX_STATE_FREE
;
104 * ecryptfs_find_daemon_by_euid
105 * @euid: The effective user id which maps to the desired daemon id
106 * @daemon: If return value is zero, points to the desired daemon pointer
108 * Must be called with ecryptfs_daemon_hash_mux held.
110 * Search the hash list for the given user id.
112 * Returns zero if the user id exists in the list; non-zero otherwise.
114 int ecryptfs_find_daemon_by_euid(struct ecryptfs_daemon
**daemon
, uid_t euid
)
116 struct hlist_node
*elem
;
119 hlist_for_each_entry(*daemon
, elem
,
120 &ecryptfs_daemon_hash
[ecryptfs_uid_hash(euid
)],
122 if ((*daemon
)->euid
== euid
) {
133 ecryptfs_send_message_locked(unsigned int transport
, char *data
, int data_len
,
134 u8 msg_type
, struct ecryptfs_msg_ctx
**msg_ctx
);
137 * ecryptfs_send_raw_message
138 * @transport: Transport type
139 * @msg_type: Message type
140 * @daemon: Daemon struct for recipient of message
142 * A raw message is one that does not include an ecryptfs_message
143 * struct. It simply has a type.
145 * Must be called with ecryptfs_daemon_hash_mux held.
147 * Returns zero on success; non-zero otherwise
149 static int ecryptfs_send_raw_message(unsigned int transport
, u8 msg_type
,
150 struct ecryptfs_daemon
*daemon
)
152 struct ecryptfs_msg_ctx
*msg_ctx
;
156 case ECRYPTFS_TRANSPORT_NETLINK
:
157 rc
= ecryptfs_send_netlink(NULL
, 0, NULL
, msg_type
, 0,
160 case ECRYPTFS_TRANSPORT_MISCDEV
:
161 rc
= ecryptfs_send_message_locked(transport
, NULL
, 0, msg_type
,
164 printk(KERN_ERR
"%s: Error whilst attempting to send "
165 "message via procfs; rc = [%d]\n", __func__
, rc
);
168 /* Raw messages are logically context-free (e.g., no
169 * reply is expected), so we set the state of the
170 * ecryptfs_msg_ctx object to indicate that it should
171 * be freed as soon as the transport sends out the message. */
172 mutex_lock(&msg_ctx
->mux
);
173 msg_ctx
->state
= ECRYPTFS_MSG_CTX_STATE_NO_REPLY
;
174 mutex_unlock(&msg_ctx
->mux
);
176 case ECRYPTFS_TRANSPORT_CONNECTOR
:
177 case ECRYPTFS_TRANSPORT_RELAYFS
:
186 * ecryptfs_spawn_daemon - Create and initialize a new daemon struct
187 * @daemon: Pointer to set to newly allocated daemon struct
188 * @euid: Effective user id for the daemon
189 * @pid: Process id for the daemon
191 * Must be called ceremoniously while in possession of
192 * ecryptfs_sacred_daemon_hash_mux
194 * Returns zero on success; non-zero otherwise
197 ecryptfs_spawn_daemon(struct ecryptfs_daemon
**daemon
, uid_t euid
, pid_t pid
)
201 (*daemon
) = kzalloc(sizeof(**daemon
), GFP_KERNEL
);
204 printk(KERN_ERR
"%s: Failed to allocate [%Zd] bytes of "
205 "GFP_KERNEL memory\n", __func__
, sizeof(**daemon
));
208 (*daemon
)->euid
= euid
;
209 (*daemon
)->pid
= pid
;
210 (*daemon
)->task
= current
;
211 mutex_init(&(*daemon
)->mux
);
212 INIT_LIST_HEAD(&(*daemon
)->msg_ctx_out_queue
);
213 init_waitqueue_head(&(*daemon
)->wait
);
214 (*daemon
)->num_queued_msg_ctx
= 0;
215 hlist_add_head(&(*daemon
)->euid_chain
,
216 &ecryptfs_daemon_hash
[ecryptfs_uid_hash(euid
)]);
222 * ecryptfs_process_helo
223 * @transport: The underlying transport (netlink, etc.)
224 * @euid: The user ID owner of the message
225 * @pid: The process ID for the userspace program that sent the
228 * Adds the euid and pid values to the daemon euid hash. If an euid
229 * already has a daemon pid registered, the daemon will be
230 * unregistered before the new daemon is put into the hash list.
231 * Returns zero after adding a new daemon to the hash list;
232 * non-zero otherwise.
234 int ecryptfs_process_helo(unsigned int transport
, uid_t euid
, pid_t pid
)
236 struct ecryptfs_daemon
*new_daemon
;
237 struct ecryptfs_daemon
*old_daemon
;
240 mutex_lock(&ecryptfs_daemon_hash_mux
);
241 rc
= ecryptfs_find_daemon_by_euid(&old_daemon
, euid
);
243 printk(KERN_WARNING
"Received request from user [%d] "
244 "to register daemon [%d]; unregistering daemon "
245 "[%d]\n", euid
, pid
, old_daemon
->pid
);
246 rc
= ecryptfs_send_raw_message(transport
, ECRYPTFS_MSG_QUIT
,
249 printk(KERN_WARNING
"Failed to send QUIT "
250 "message to daemon [%d]; rc = [%d]\n",
251 old_daemon
->pid
, rc
);
252 hlist_del(&old_daemon
->euid_chain
);
255 rc
= ecryptfs_spawn_daemon(&new_daemon
, euid
, pid
);
257 printk(KERN_ERR
"%s: The gods are displeased with this attempt "
258 "to create a new daemon object for euid [%d]; pid [%d]; "
259 "rc = [%d]\n", __func__
, euid
, pid
, rc
);
260 mutex_unlock(&ecryptfs_daemon_hash_mux
);
265 * ecryptfs_exorcise_daemon - Destroy the daemon struct
267 * Must be called ceremoniously while in possession of
268 * ecryptfs_daemon_hash_mux and the daemon's own mux.
270 int ecryptfs_exorcise_daemon(struct ecryptfs_daemon
*daemon
)
272 struct ecryptfs_msg_ctx
*msg_ctx
, *msg_ctx_tmp
;
275 mutex_lock(&daemon
->mux
);
276 if ((daemon
->flags
& ECRYPTFS_DAEMON_IN_READ
)
277 || (daemon
->flags
& ECRYPTFS_DAEMON_IN_POLL
)) {
279 printk(KERN_WARNING
"%s: Attempt to destroy daemon with pid "
280 "[%d], but it is in the midst of a read or a poll\n",
281 __func__
, daemon
->pid
);
282 mutex_unlock(&daemon
->mux
);
285 list_for_each_entry_safe(msg_ctx
, msg_ctx_tmp
,
286 &daemon
->msg_ctx_out_queue
, daemon_out_list
) {
287 list_del(&msg_ctx
->daemon_out_list
);
288 daemon
->num_queued_msg_ctx
--;
289 printk(KERN_WARNING
"%s: Warning: dropping message that is in "
290 "the out queue of a dying daemon\n", __func__
);
291 ecryptfs_msg_ctx_alloc_to_free(msg_ctx
);
293 hlist_del(&daemon
->euid_chain
);
295 wake_up_process(daemon
->task
);
296 mutex_unlock(&daemon
->mux
);
297 memset(daemon
, 0, sizeof(*daemon
));
304 * ecryptfs_process_quit
305 * @euid: The user ID owner of the message
306 * @pid: The process ID for the userspace program that sent the
309 * Deletes the corresponding daemon for the given euid and pid, if
310 * it is the registered that is requesting the deletion. Returns zero
311 * after deleting the desired daemon; non-zero otherwise.
313 int ecryptfs_process_quit(uid_t euid
, pid_t pid
)
315 struct ecryptfs_daemon
*daemon
;
318 mutex_lock(&ecryptfs_daemon_hash_mux
);
319 rc
= ecryptfs_find_daemon_by_euid(&daemon
, euid
);
322 printk(KERN_ERR
"Received request from user [%d] to "
323 "unregister unrecognized daemon [%d]\n", euid
, pid
);
326 rc
= ecryptfs_exorcise_daemon(daemon
);
328 mutex_unlock(&ecryptfs_daemon_hash_mux
);
333 * ecryptfs_process_reponse
334 * @msg: The ecryptfs message received; the caller should sanity check
335 * msg->data_len and free the memory
336 * @pid: The process ID of the userspace application that sent the
338 * @seq: The sequence number of the message; must match the sequence
339 * number for the existing message context waiting for this
342 * Processes a response message after sending an operation request to
343 * userspace. Some other process is awaiting this response. Before
344 * sending out its first communications, the other process allocated a
345 * msg_ctx from the ecryptfs_msg_ctx_arr at a particular index. The
346 * response message contains this index so that we can copy over the
347 * response message into the msg_ctx that the process holds a
348 * reference to. The other process is going to wake up, check to see
349 * that msg_ctx->state == ECRYPTFS_MSG_CTX_STATE_DONE, and then
350 * proceed to read off and process the response message. Returns zero
351 * upon delivery to desired context element; non-zero upon delivery
354 * Returns zero on success; non-zero otherwise
356 int ecryptfs_process_response(struct ecryptfs_message
*msg
, uid_t euid
,
359 struct ecryptfs_daemon
*daemon
;
360 struct ecryptfs_msg_ctx
*msg_ctx
;
364 if (msg
->index
>= ecryptfs_message_buf_len
) {
366 printk(KERN_ERR
"%s: Attempt to reference "
367 "context buffer at index [%d]; maximum "
368 "allowable is [%d]\n", __func__
, msg
->index
,
369 (ecryptfs_message_buf_len
- 1));
372 msg_ctx
= &ecryptfs_msg_ctx_arr
[msg
->index
];
373 mutex_lock(&msg_ctx
->mux
);
374 mutex_lock(&ecryptfs_daemon_hash_mux
);
375 rc
= ecryptfs_find_daemon_by_euid(&daemon
, msg_ctx
->task
->euid
);
376 mutex_unlock(&ecryptfs_daemon_hash_mux
);
379 printk(KERN_WARNING
"%s: User [%d] received a "
380 "message response from process [%d] but does "
381 "not have a registered daemon\n", __func__
,
382 msg_ctx
->task
->euid
, pid
);
385 if (msg_ctx
->task
->euid
!= euid
) {
387 printk(KERN_WARNING
"%s: Received message from user "
388 "[%d]; expected message from user [%d]\n", __func__
,
389 euid
, msg_ctx
->task
->euid
);
392 if (daemon
->pid
!= pid
) {
394 printk(KERN_ERR
"%s: User [%d] sent a message response "
395 "from an unrecognized process [%d]\n",
396 __func__
, msg_ctx
->task
->euid
, pid
);
399 if (msg_ctx
->state
!= ECRYPTFS_MSG_CTX_STATE_PENDING
) {
401 printk(KERN_WARNING
"%s: Desired context element is not "
402 "pending a response\n", __func__
);
404 } else if (msg_ctx
->counter
!= seq
) {
406 printk(KERN_WARNING
"%s: Invalid message sequence; "
407 "expected [%d]; received [%d]\n", __func__
,
408 msg_ctx
->counter
, seq
);
411 msg_size
= (sizeof(*msg
) + msg
->data_len
);
412 msg_ctx
->msg
= kmalloc(msg_size
, GFP_KERNEL
);
415 printk(KERN_ERR
"%s: Failed to allocate [%Zd] bytes of "
416 "GFP_KERNEL memory\n", __func__
, msg_size
);
419 memcpy(msg_ctx
->msg
, msg
, msg_size
);
420 msg_ctx
->state
= ECRYPTFS_MSG_CTX_STATE_DONE
;
423 wake_up_process(msg_ctx
->task
);
425 mutex_unlock(&msg_ctx
->mux
);
431 * ecryptfs_send_message_locked
432 * @transport: The transport over which to send the message (i.e.,
434 * @data: The data to send
435 * @data_len: The length of data
436 * @msg_ctx: The message context allocated for the send
438 * Must be called with ecryptfs_daemon_hash_mux held.
440 * Returns zero on success; non-zero otherwise
443 ecryptfs_send_message_locked(unsigned int transport
, char *data
, int data_len
,
444 u8 msg_type
, struct ecryptfs_msg_ctx
**msg_ctx
)
446 struct ecryptfs_daemon
*daemon
;
449 rc
= ecryptfs_find_daemon_by_euid(&daemon
, current
->euid
);
452 printk(KERN_ERR
"%s: User [%d] does not have a daemon "
453 "registered\n", __func__
, current
->euid
);
456 mutex_lock(&ecryptfs_msg_ctx_lists_mux
);
457 rc
= ecryptfs_acquire_free_msg_ctx(msg_ctx
);
459 mutex_unlock(&ecryptfs_msg_ctx_lists_mux
);
460 printk(KERN_WARNING
"%s: Could not claim a free "
461 "context element\n", __func__
);
464 ecryptfs_msg_ctx_free_to_alloc(*msg_ctx
);
465 mutex_unlock(&(*msg_ctx
)->mux
);
466 mutex_unlock(&ecryptfs_msg_ctx_lists_mux
);
468 case ECRYPTFS_TRANSPORT_NETLINK
:
469 rc
= ecryptfs_send_netlink(data
, data_len
, *msg_ctx
, msg_type
,
472 case ECRYPTFS_TRANSPORT_MISCDEV
:
473 rc
= ecryptfs_send_miscdev(data
, data_len
, *msg_ctx
, msg_type
,
476 case ECRYPTFS_TRANSPORT_CONNECTOR
:
477 case ECRYPTFS_TRANSPORT_RELAYFS
:
482 printk(KERN_ERR
"%s: Error attempting to send message to "
483 "userspace daemon; rc = [%d]\n", __func__
, rc
);
489 * ecryptfs_send_message
490 * @transport: The transport over which to send the message (i.e.,
492 * @data: The data to send
493 * @data_len: The length of data
494 * @msg_ctx: The message context allocated for the send
496 * Grabs ecryptfs_daemon_hash_mux.
498 * Returns zero on success; non-zero otherwise
500 int ecryptfs_send_message(unsigned int transport
, char *data
, int data_len
,
501 struct ecryptfs_msg_ctx
**msg_ctx
)
505 mutex_lock(&ecryptfs_daemon_hash_mux
);
506 rc
= ecryptfs_send_message_locked(transport
, data
, data_len
,
507 ECRYPTFS_MSG_REQUEST
, msg_ctx
);
508 mutex_unlock(&ecryptfs_daemon_hash_mux
);
513 * ecryptfs_wait_for_response
514 * @msg_ctx: The context that was assigned when sending a message
515 * @msg: The incoming message from userspace; not set if rc != 0
517 * Sleeps until awaken by ecryptfs_receive_message or until the amount
518 * of time exceeds ecryptfs_message_wait_timeout. If zero is
519 * returned, msg will point to a valid message from userspace; a
520 * non-zero value is returned upon failure to receive a message or an
521 * error occurs. Callee must free @msg on success.
523 int ecryptfs_wait_for_response(struct ecryptfs_msg_ctx
*msg_ctx
,
524 struct ecryptfs_message
**msg
)
526 signed long timeout
= ecryptfs_message_wait_timeout
* HZ
;
530 timeout
= schedule_timeout_interruptible(timeout
);
531 mutex_lock(&ecryptfs_msg_ctx_lists_mux
);
532 mutex_lock(&msg_ctx
->mux
);
533 if (msg_ctx
->state
!= ECRYPTFS_MSG_CTX_STATE_DONE
) {
535 mutex_unlock(&msg_ctx
->mux
);
536 mutex_unlock(&ecryptfs_msg_ctx_lists_mux
);
544 ecryptfs_msg_ctx_alloc_to_free(msg_ctx
);
545 mutex_unlock(&msg_ctx
->mux
);
546 mutex_unlock(&ecryptfs_msg_ctx_lists_mux
);
550 int ecryptfs_init_messaging(unsigned int transport
)
555 if (ecryptfs_number_of_users
> ECRYPTFS_MAX_NUM_USERS
) {
556 ecryptfs_number_of_users
= ECRYPTFS_MAX_NUM_USERS
;
557 printk(KERN_WARNING
"%s: Specified number of users is "
558 "too large, defaulting to [%d] users\n", __func__
,
559 ecryptfs_number_of_users
);
561 mutex_init(&ecryptfs_daemon_hash_mux
);
562 mutex_lock(&ecryptfs_daemon_hash_mux
);
563 ecryptfs_hash_buckets
= 1;
564 while (ecryptfs_number_of_users
>> ecryptfs_hash_buckets
)
565 ecryptfs_hash_buckets
++;
566 ecryptfs_daemon_hash
= kmalloc((sizeof(struct hlist_head
)
567 * ecryptfs_hash_buckets
), GFP_KERNEL
);
568 if (!ecryptfs_daemon_hash
) {
570 printk(KERN_ERR
"%s: Failed to allocate memory\n", __func__
);
571 mutex_unlock(&ecryptfs_daemon_hash_mux
);
574 for (i
= 0; i
< ecryptfs_hash_buckets
; i
++)
575 INIT_HLIST_HEAD(&ecryptfs_daemon_hash
[i
]);
576 mutex_unlock(&ecryptfs_daemon_hash_mux
);
577 ecryptfs_msg_ctx_arr
= kmalloc((sizeof(struct ecryptfs_msg_ctx
)
578 * ecryptfs_message_buf_len
),
580 if (!ecryptfs_msg_ctx_arr
) {
582 printk(KERN_ERR
"%s: Failed to allocate memory\n", __func__
);
585 mutex_init(&ecryptfs_msg_ctx_lists_mux
);
586 mutex_lock(&ecryptfs_msg_ctx_lists_mux
);
587 ecryptfs_msg_counter
= 0;
588 for (i
= 0; i
< ecryptfs_message_buf_len
; i
++) {
589 INIT_LIST_HEAD(&ecryptfs_msg_ctx_arr
[i
].node
);
590 INIT_LIST_HEAD(&ecryptfs_msg_ctx_arr
[i
].daemon_out_list
);
591 mutex_init(&ecryptfs_msg_ctx_arr
[i
].mux
);
592 mutex_lock(&ecryptfs_msg_ctx_arr
[i
].mux
);
593 ecryptfs_msg_ctx_arr
[i
].index
= i
;
594 ecryptfs_msg_ctx_arr
[i
].state
= ECRYPTFS_MSG_CTX_STATE_FREE
;
595 ecryptfs_msg_ctx_arr
[i
].counter
= 0;
596 ecryptfs_msg_ctx_arr
[i
].task
= NULL
;
597 ecryptfs_msg_ctx_arr
[i
].msg
= NULL
;
598 list_add_tail(&ecryptfs_msg_ctx_arr
[i
].node
,
599 &ecryptfs_msg_ctx_free_list
);
600 mutex_unlock(&ecryptfs_msg_ctx_arr
[i
].mux
);
602 mutex_unlock(&ecryptfs_msg_ctx_lists_mux
);
604 case ECRYPTFS_TRANSPORT_NETLINK
:
605 rc
= ecryptfs_init_netlink();
607 ecryptfs_release_messaging(transport
);
609 case ECRYPTFS_TRANSPORT_MISCDEV
:
610 rc
= ecryptfs_init_ecryptfs_miscdev();
612 ecryptfs_release_messaging(transport
);
614 case ECRYPTFS_TRANSPORT_CONNECTOR
:
615 case ECRYPTFS_TRANSPORT_RELAYFS
:
623 void ecryptfs_release_messaging(unsigned int transport
)
625 if (ecryptfs_msg_ctx_arr
) {
628 mutex_lock(&ecryptfs_msg_ctx_lists_mux
);
629 for (i
= 0; i
< ecryptfs_message_buf_len
; i
++) {
630 mutex_lock(&ecryptfs_msg_ctx_arr
[i
].mux
);
631 if (ecryptfs_msg_ctx_arr
[i
].msg
)
632 kfree(ecryptfs_msg_ctx_arr
[i
].msg
);
633 mutex_unlock(&ecryptfs_msg_ctx_arr
[i
].mux
);
635 kfree(ecryptfs_msg_ctx_arr
);
636 mutex_unlock(&ecryptfs_msg_ctx_lists_mux
);
638 if (ecryptfs_daemon_hash
) {
639 struct hlist_node
*elem
;
640 struct ecryptfs_daemon
*daemon
;
643 mutex_lock(&ecryptfs_daemon_hash_mux
);
644 for (i
= 0; i
< ecryptfs_hash_buckets
; i
++) {
647 hlist_for_each_entry(daemon
, elem
,
648 &ecryptfs_daemon_hash
[i
],
650 rc
= ecryptfs_exorcise_daemon(daemon
);
652 printk(KERN_ERR
"%s: Error whilst "
653 "attempting to destroy daemon; "
654 "rc = [%d]. Dazed and confused, "
655 "but trying to continue.\n",
659 kfree(ecryptfs_daemon_hash
);
660 mutex_unlock(&ecryptfs_daemon_hash_mux
);
663 case ECRYPTFS_TRANSPORT_NETLINK
:
664 ecryptfs_release_netlink();
666 case ECRYPTFS_TRANSPORT_MISCDEV
:
667 ecryptfs_destroy_ecryptfs_miscdev();
669 case ECRYPTFS_TRANSPORT_CONNECTOR
:
670 case ECRYPTFS_TRANSPORT_RELAYFS
: