2 * (C) 2001 Clemson University and The University of Chicago
4 * Changes by Acxiom Corporation to add protocol version to kernel
5 * communication, Copyright Acxiom Corporation, 2005.
7 * See COPYING in top-level directory.
11 #include "orangefs-kernel.h"
12 #include "orangefs-dev-proto.h"
13 #include "orangefs-bufmap.h"
14 #include "orangefs-debugfs.h"
16 #include <linux/debugfs.h>
17 #include <linux/slab.h>
19 /* this file implements the /dev/pvfs2-req device node */
21 uint32_t orangefs_userspace_version
;
23 static int open_access_count
;
25 static DEFINE_MUTEX(devreq_mutex
);
27 #define DUMP_DEVICE_ERROR() \
29 gossip_err("*****************************************************\n");\
30 gossip_err("ORANGEFS Device Error: You cannot open the device file "); \
31 gossip_err("\n/dev/%s more than once. Please make sure that\nthere " \
32 "are no ", ORANGEFS_REQDEVICE_NAME); \
33 gossip_err("instances of a program using this device\ncurrently " \
34 "running. (You must verify this!)\n"); \
35 gossip_err("For example, you can use the lsof program as follows:\n");\
36 gossip_err("'lsof | grep %s' (run this as root)\n", \
37 ORANGEFS_REQDEVICE_NAME); \
38 gossip_err(" open_access_count = %d\n", open_access_count); \
39 gossip_err("*****************************************************\n");\
42 static int hash_func(__u64 tag
, int table_size
)
44 return do_div(tag
, (unsigned int)table_size
);
47 static void orangefs_devreq_add_op(struct orangefs_kernel_op_s
*op
)
49 int index
= hash_func(op
->tag
, hash_table_size
);
51 list_add_tail(&op
->list
, &orangefs_htable_ops_in_progress
[index
]);
55 * find the op with this tag and remove it from the in progress
58 static struct orangefs_kernel_op_s
*orangefs_devreq_remove_op(__u64 tag
)
60 struct orangefs_kernel_op_s
*op
, *next
;
63 index
= hash_func(tag
, hash_table_size
);
65 spin_lock(&orangefs_htable_ops_in_progress_lock
);
66 list_for_each_entry_safe(op
,
68 &orangefs_htable_ops_in_progress
[index
],
70 if (op
->tag
== tag
&& !op_state_purged(op
) &&
71 !op_state_given_up(op
)) {
72 list_del_init(&op
->list
);
73 spin_unlock(&orangefs_htable_ops_in_progress_lock
);
78 spin_unlock(&orangefs_htable_ops_in_progress_lock
);
82 /* Returns whether any FS are still pending remounted */
83 static int mark_all_pending_mounts(void)
86 struct orangefs_sb_info_s
*orangefs_sb
= NULL
;
88 spin_lock(&orangefs_superblocks_lock
);
89 list_for_each_entry(orangefs_sb
, &orangefs_superblocks
, list
) {
90 /* All of these file system require a remount */
91 orangefs_sb
->mount_pending
= 1;
94 spin_unlock(&orangefs_superblocks_lock
);
99 * Determine if a given file system needs to be remounted or not
100 * Returns -1 on error
101 * 0 if already mounted
104 static int fs_mount_pending(__s32 fsid
)
106 int mount_pending
= -1;
107 struct orangefs_sb_info_s
*orangefs_sb
= NULL
;
109 spin_lock(&orangefs_superblocks_lock
);
110 list_for_each_entry(orangefs_sb
, &orangefs_superblocks
, list
) {
111 if (orangefs_sb
->fs_id
== fsid
) {
112 mount_pending
= orangefs_sb
->mount_pending
;
116 spin_unlock(&orangefs_superblocks_lock
);
117 return mount_pending
;
120 static int orangefs_devreq_open(struct inode
*inode
, struct file
*file
)
124 /* in order to ensure that the filesystem driver sees correct UIDs */
125 if (file
->f_cred
->user_ns
!= &init_user_ns
) {
126 gossip_err("%s: device cannot be opened outside init_user_ns\n",
131 if (!(file
->f_flags
& O_NONBLOCK
)) {
132 gossip_err("%s: device cannot be opened in blocking mode\n",
137 gossip_debug(GOSSIP_DEV_DEBUG
, "client-core: opening device\n");
138 mutex_lock(&devreq_mutex
);
140 if (open_access_count
== 0) {
141 open_access_count
= 1;
146 mutex_unlock(&devreq_mutex
);
150 gossip_debug(GOSSIP_DEV_DEBUG
,
151 "pvfs2-client-core: open device complete (ret = %d)\n",
156 /* Function for read() callers into the device */
157 static ssize_t
orangefs_devreq_read(struct file
*file
,
159 size_t count
, loff_t
*offset
)
161 struct orangefs_kernel_op_s
*op
, *temp
;
162 __s32 proto_ver
= ORANGEFS_KERNEL_PROTO_VERSION
;
163 static __s32 magic
= ORANGEFS_DEVREQ_MAGIC
;
164 struct orangefs_kernel_op_s
*cur_op
= NULL
;
167 /* We do not support blocking IO. */
168 if (!(file
->f_flags
& O_NONBLOCK
)) {
169 gossip_err("%s: blocking read from client-core.\n",
175 * The client will do an ioctl to find MAX_DEV_REQ_UPSIZE, then
176 * always read with that size buffer.
178 if (count
!= MAX_DEV_REQ_UPSIZE
) {
179 gossip_err("orangefs: client-core tried to read wrong size\n");
184 /* Get next op (if any) from top of list. */
185 spin_lock(&orangefs_request_list_lock
);
186 list_for_each_entry_safe(op
, temp
, &orangefs_request_list
, list
) {
188 /* This lock is held past the end of the loop when we break. */
189 spin_lock(&op
->lock
);
190 if (unlikely(op_state_purged(op
) || op_state_given_up(op
))) {
191 spin_unlock(&op
->lock
);
195 fsid
= fsid_of_op(op
);
196 if (fsid
!= ORANGEFS_FS_ID_NULL
) {
198 /* Skip ops whose filesystem needs to be mounted. */
199 ret
= fs_mount_pending(fsid
);
201 gossip_debug(GOSSIP_DEV_DEBUG
,
202 "%s: mount pending, skipping op tag "
206 get_opname_string(op
));
207 spin_unlock(&op
->lock
);
210 * Skip ops whose filesystem we don't know about unless
211 * it is being mounted.
213 /* XXX: is there a better way to detect this? */
214 } else if (ret
== -1 &&
216 ORANGEFS_VFS_OP_FS_MOUNT
||
218 ORANGEFS_VFS_OP_GETATTR
)) {
219 gossip_debug(GOSSIP_DEV_DEBUG
,
220 "orangefs: skipping op tag %llu %s\n",
221 llu(op
->tag
), get_opname_string(op
));
223 "orangefs: ERROR: fs_mount_pending %d\n",
225 spin_unlock(&op
->lock
);
230 * Either this op does not pertain to a filesystem, is mounting
231 * a filesystem, or pertains to a mounted filesystem. Let it
239 * At this point we either have a valid op and can continue or have not
240 * found an op and must ask the client to try again later.
243 spin_unlock(&orangefs_request_list_lock
);
247 gossip_debug(GOSSIP_DEV_DEBUG
, "%s: reading op tag %llu %s\n",
250 get_opname_string(cur_op
));
253 * Such an op should never be on the list in the first place. If so, we
256 if (op_state_in_progress(cur_op
) || op_state_serviced(cur_op
)) {
257 gossip_err("orangefs: ERROR: Current op already queued.\n");
258 list_del_init(&cur_op
->list
);
259 spin_unlock(&cur_op
->lock
);
260 spin_unlock(&orangefs_request_list_lock
);
264 list_del_init(&cur_op
->list
);
265 spin_unlock(&orangefs_request_list_lock
);
267 spin_unlock(&cur_op
->lock
);
269 /* Push the upcall out. */
270 ret
= copy_to_user(buf
, &proto_ver
, sizeof(__s32
));
273 ret
= copy_to_user(buf
+sizeof(__s32
), &magic
, sizeof(__s32
));
276 ret
= copy_to_user(buf
+2 * sizeof(__s32
), &cur_op
->tag
, sizeof(__u64
));
279 ret
= copy_to_user(buf
+2*sizeof(__s32
)+sizeof(__u64
), &cur_op
->upcall
,
280 sizeof(struct orangefs_upcall_s
));
284 spin_lock(&orangefs_htable_ops_in_progress_lock
);
285 spin_lock(&cur_op
->lock
);
286 if (unlikely(op_state_given_up(cur_op
))) {
287 spin_unlock(&cur_op
->lock
);
288 spin_unlock(&orangefs_htable_ops_in_progress_lock
);
289 complete(&cur_op
->waitq
);
294 * Set the operation to be in progress and move it between lists since
295 * it has been sent to the client.
297 set_op_state_inprogress(cur_op
);
298 gossip_debug(GOSSIP_DEV_DEBUG
,
299 "%s: 1 op:%s: op_state:%d: process:%s:\n",
301 get_opname_string(cur_op
),
304 orangefs_devreq_add_op(cur_op
);
305 spin_unlock(&cur_op
->lock
);
306 spin_unlock(&orangefs_htable_ops_in_progress_lock
);
308 /* The client only asks to read one size buffer. */
309 return MAX_DEV_REQ_UPSIZE
;
312 * We were unable to copy the op data to the client. Put the op back in
313 * list. If client has crashed, the op will be purged later when the
314 * device is released.
316 gossip_err("orangefs: Failed to copy data to user space\n");
317 spin_lock(&orangefs_request_list_lock
);
318 spin_lock(&cur_op
->lock
);
319 if (likely(!op_state_given_up(cur_op
))) {
320 set_op_state_waiting(cur_op
);
321 gossip_debug(GOSSIP_DEV_DEBUG
,
322 "%s: 2 op:%s: op_state:%d: process:%s:\n",
324 get_opname_string(cur_op
),
327 list_add(&cur_op
->list
, &orangefs_request_list
);
328 spin_unlock(&cur_op
->lock
);
330 spin_unlock(&cur_op
->lock
);
331 complete(&cur_op
->waitq
);
333 spin_unlock(&orangefs_request_list_lock
);
338 * Function for writev() callers into the device.
340 * Userspace should have written:
344 * - struct orangefs_downcall_s
345 * - trailer buffer (in the case of READDIR operations)
347 static ssize_t
orangefs_devreq_write_iter(struct kiocb
*iocb
,
348 struct iov_iter
*iter
)
351 struct orangefs_kernel_op_s
*op
= NULL
;
357 int total
= ret
= iov_iter_count(iter
);
358 int downcall_size
= sizeof(struct orangefs_downcall_s
);
359 int head_size
= sizeof(head
);
361 gossip_debug(GOSSIP_DEV_DEBUG
, "%s: total:%d: ret:%zd:\n",
366 if (total
< MAX_DEV_REQ_DOWNSIZE
) {
367 gossip_err("%s: total:%d: must be at least:%u:\n",
370 (unsigned int) MAX_DEV_REQ_DOWNSIZE
);
374 if (!copy_from_iter_full(&head
, head_size
, iter
)) {
375 gossip_err("%s: failed to copy head.\n", __func__
);
379 if (head
.version
< ORANGEFS_MINIMUM_USERSPACE_VERSION
) {
380 gossip_err("%s: userspace claims version"
381 "%d, minimum version required: %d.\n",
384 ORANGEFS_MINIMUM_USERSPACE_VERSION
);
388 if (head
.magic
!= ORANGEFS_DEVREQ_MAGIC
) {
389 gossip_err("Error: Device magic number does not match.\n");
393 if (!orangefs_userspace_version
) {
394 orangefs_userspace_version
= head
.version
;
395 } else if (orangefs_userspace_version
!= head
.version
) {
396 gossip_err("Error: userspace version changes\n");
400 /* remove the op from the in progress hash table */
401 op
= orangefs_devreq_remove_op(head
.tag
);
403 gossip_debug(GOSSIP_DEV_DEBUG
,
404 "%s: No one's waiting for tag %llu\n",
405 __func__
, llu(head
.tag
));
409 if (!copy_from_iter_full(&op
->downcall
, downcall_size
, iter
)) {
410 gossip_err("%s: failed to copy downcall.\n", __func__
);
414 if (op
->downcall
.status
)
418 * We've successfully peeled off the head and the downcall.
419 * Something has gone awry if total doesn't equal the
420 * sum of head_size, downcall_size and trailer_size.
422 if ((head_size
+ downcall_size
+ op
->downcall
.trailer_size
) != total
) {
423 gossip_err("%s: funky write, head_size:%d"
424 ": downcall_size:%d: trailer_size:%lld"
425 ": total size:%d:\n",
429 op
->downcall
.trailer_size
,
434 /* Only READDIR operations should have trailers. */
435 if ((op
->downcall
.type
!= ORANGEFS_VFS_OP_READDIR
) &&
436 (op
->downcall
.trailer_size
!= 0)) {
437 gossip_err("%s: %x operation with trailer.",
443 /* READDIR operations should always have trailers. */
444 if ((op
->downcall
.type
== ORANGEFS_VFS_OP_READDIR
) &&
445 (op
->downcall
.trailer_size
== 0)) {
446 gossip_err("%s: %x operation with no trailer.",
452 if (op
->downcall
.type
!= ORANGEFS_VFS_OP_READDIR
)
455 op
->downcall
.trailer_buf
=
456 vmalloc(op
->downcall
.trailer_size
);
457 if (op
->downcall
.trailer_buf
== NULL
) {
458 gossip_err("%s: failed trailer vmalloc.\n",
462 memset(op
->downcall
.trailer_buf
, 0, op
->downcall
.trailer_size
);
463 if (!copy_from_iter_full(op
->downcall
.trailer_buf
,
464 op
->downcall
.trailer_size
, iter
)) {
465 gossip_err("%s: failed to copy trailer.\n", __func__
);
466 vfree(op
->downcall
.trailer_buf
);
472 * Return to vfs waitqueue, and back to service_operation
473 * through wait_for_matching_downcall.
475 spin_lock(&op
->lock
);
476 if (unlikely(op_is_cancel(op
))) {
477 spin_unlock(&op
->lock
);
479 } else if (unlikely(op_state_given_up(op
))) {
480 spin_unlock(&op
->lock
);
481 complete(&op
->waitq
);
483 set_op_state_serviced(op
);
484 gossip_debug(GOSSIP_DEV_DEBUG
,
485 "%s: op:%s: op_state:%d: process:%s:\n",
487 get_opname_string(op
),
490 spin_unlock(&op
->lock
);
495 op
->downcall
.status
= -(ORANGEFS_ERROR_BIT
| 9);
500 op
->downcall
.status
= -(ORANGEFS_ERROR_BIT
| 8);
506 * NOTE: gets called when the last reference to this device is dropped.
507 * Using the open_access_count variable, we enforce a reference count
508 * on this file so that it can be opened by only one process at a time.
509 * the devreq_mutex is used to make sure all i/o has completed
510 * before we call orangefs_bufmap_finalize, and similar such tricky
513 static int orangefs_devreq_release(struct inode
*inode
, struct file
*file
)
517 gossip_debug(GOSSIP_DEV_DEBUG
,
518 "%s:pvfs2-client-core: exiting, closing device\n",
521 mutex_lock(&devreq_mutex
);
522 orangefs_bufmap_finalize();
524 open_access_count
= -1;
526 unmounted
= mark_all_pending_mounts();
527 gossip_debug(GOSSIP_DEV_DEBUG
, "ORANGEFS Device Close: Filesystem(s) %s\n",
528 (unmounted
? "UNMOUNTED" : "MOUNTED"));
531 purge_inprogress_ops();
533 orangefs_bufmap_run_down();
535 gossip_debug(GOSSIP_DEV_DEBUG
,
536 "pvfs2-client-core: device close complete\n");
537 open_access_count
= 0;
538 orangefs_userspace_version
= 0;
539 mutex_unlock(&devreq_mutex
);
543 int is_daemon_in_service(void)
548 * What this function does is checks if client-core is alive
549 * based on the access count we maintain on the device.
551 mutex_lock(&devreq_mutex
);
552 in_service
= open_access_count
== 1 ? 0 : -EIO
;
553 mutex_unlock(&devreq_mutex
);
557 bool __is_daemon_in_service(void)
559 return open_access_count
== 1;
562 static inline long check_ioctl_command(unsigned int command
)
564 /* Check for valid ioctl codes */
565 if (_IOC_TYPE(command
) != ORANGEFS_DEV_MAGIC
) {
566 gossip_err("device ioctl magic numbers don't match! Did you rebuild pvfs2-client-core/libpvfs2? [cmd %x, magic %x != %x]\n",
572 /* and valid ioctl commands */
573 if (_IOC_NR(command
) >= ORANGEFS_DEV_MAXNR
|| _IOC_NR(command
) <= 0) {
574 gossip_err("Invalid ioctl command number [%d >= %d]\n",
575 _IOC_NR(command
), ORANGEFS_DEV_MAXNR
);
581 static long dispatch_ioctl_command(unsigned int command
, unsigned long arg
)
583 static __s32 magic
= ORANGEFS_DEVREQ_MAGIC
;
584 static __s32 max_up_size
= MAX_DEV_REQ_UPSIZE
;
585 static __s32 max_down_size
= MAX_DEV_REQ_DOWNSIZE
;
586 struct ORANGEFS_dev_map_desc user_desc
;
588 int upstream_kmod
= 1;
589 struct orangefs_sb_info_s
*orangefs_sb
;
591 /* mtmoore: add locking here */
594 case ORANGEFS_DEV_GET_MAGIC
:
595 return ((put_user(magic
, (__s32 __user
*) arg
) == -EFAULT
) ?
598 case ORANGEFS_DEV_GET_MAX_UPSIZE
:
599 return ((put_user(max_up_size
,
600 (__s32 __user
*) arg
) == -EFAULT
) ?
603 case ORANGEFS_DEV_GET_MAX_DOWNSIZE
:
604 return ((put_user(max_down_size
,
605 (__s32 __user
*) arg
) == -EFAULT
) ?
608 case ORANGEFS_DEV_MAP
:
609 ret
= copy_from_user(&user_desc
,
610 (struct ORANGEFS_dev_map_desc __user
*)
612 sizeof(struct ORANGEFS_dev_map_desc
));
613 /* WTF -EIO and not -EFAULT? */
614 return ret
? -EIO
: orangefs_bufmap_initialize(&user_desc
);
615 case ORANGEFS_DEV_REMOUNT_ALL
:
616 gossip_debug(GOSSIP_DEV_DEBUG
,
617 "%s: got ORANGEFS_DEV_REMOUNT_ALL\n",
621 * remount all mounted orangefs volumes to regain the lost
622 * dynamic mount tables (if any) -- NOTE: this is done
623 * without keeping the superblock list locked due to the
624 * upcall/downcall waiting. also, the request mutex is
625 * used to ensure that no operations will be serviced until
626 * all of the remounts are serviced (to avoid ops between
629 ret
= mutex_lock_interruptible(&orangefs_request_mutex
);
632 gossip_debug(GOSSIP_DEV_DEBUG
,
633 "%s: priority remount in progress\n",
635 spin_lock(&orangefs_superblocks_lock
);
636 list_for_each_entry(orangefs_sb
, &orangefs_superblocks
, list
) {
638 * We have to drop the spinlock, so entries can be
639 * removed. They can't be freed, though, so we just
640 * keep the forward pointers and zero the back ones -
641 * that way we can get to the rest of the list.
643 if (!orangefs_sb
->list
.prev
)
645 gossip_debug(GOSSIP_DEV_DEBUG
,
646 "%s: Remounting SB %p\n",
650 spin_unlock(&orangefs_superblocks_lock
);
651 ret
= orangefs_remount(orangefs_sb
);
652 spin_lock(&orangefs_superblocks_lock
);
654 gossip_debug(GOSSIP_DEV_DEBUG
,
655 "SB %p remount failed\n",
660 spin_unlock(&orangefs_superblocks_lock
);
661 gossip_debug(GOSSIP_DEV_DEBUG
,
662 "%s: priority remount complete\n",
664 mutex_unlock(&orangefs_request_mutex
);
667 case ORANGEFS_DEV_UPSTREAM
:
668 ret
= copy_to_user((void __user
*)arg
,
670 sizeof(upstream_kmod
));
677 case ORANGEFS_DEV_CLIENT_MASK
:
678 return orangefs_debugfs_new_client_mask((void __user
*)arg
);
679 case ORANGEFS_DEV_CLIENT_STRING
:
680 return orangefs_debugfs_new_client_string((void __user
*)arg
);
681 case ORANGEFS_DEV_DEBUG
:
682 return orangefs_debugfs_new_debug((void __user
*)arg
);
689 static long orangefs_devreq_ioctl(struct file
*file
,
690 unsigned int command
, unsigned long arg
)
694 /* Check for properly constructed commands */
695 ret
= check_ioctl_command(command
);
699 return (int)dispatch_ioctl_command(command
, arg
);
702 #ifdef CONFIG_COMPAT /* CONFIG_COMPAT is in .config */
704 /* Compat structure for the ORANGEFS_DEV_MAP ioctl */
705 struct ORANGEFS_dev_map_desc32
{
712 static unsigned long translate_dev_map26(unsigned long args
, long *error
)
714 struct ORANGEFS_dev_map_desc32 __user
*p32
= (void __user
*)args
;
716 * Depending on the architecture, allocate some space on the
717 * user-call-stack based on our expected layout.
719 struct ORANGEFS_dev_map_desc __user
*p
=
720 compat_alloc_user_space(sizeof(*p
));
724 /* get the ptr from the 32 bit user-space */
725 if (get_user(addr
, &p32
->ptr
))
727 /* try to put that into a 64-bit layout */
728 if (put_user(compat_ptr(addr
), &p
->ptr
))
730 /* copy the remaining fields */
731 if (copy_in_user(&p
->total_size
, &p32
->total_size
, sizeof(__s32
)))
733 if (copy_in_user(&p
->size
, &p32
->size
, sizeof(__s32
)))
735 if (copy_in_user(&p
->count
, &p32
->count
, sizeof(__s32
)))
737 return (unsigned long)p
;
744 * 32 bit user-space apps' ioctl handlers when kernel modules
745 * is compiled as a 64 bit one
747 static long orangefs_devreq_compat_ioctl(struct file
*filp
, unsigned int cmd
,
751 unsigned long arg
= args
;
753 /* Check for properly constructed commands */
754 ret
= check_ioctl_command(cmd
);
757 if (cmd
== ORANGEFS_DEV_MAP
) {
759 * convert the arguments to what we expect internally
762 arg
= translate_dev_map26(args
, &ret
);
764 gossip_err("Could not translate dev map\n");
768 /* no other ioctl requires translation */
769 return dispatch_ioctl_command(cmd
, arg
);
772 #endif /* CONFIG_COMPAT is in .config */
774 /* the assigned character device major number */
775 static int orangefs_dev_major
;
778 * Initialize orangefs device specific state:
779 * Must be called at module load time only
781 int orangefs_dev_init(void)
783 /* register orangefs-req device */
784 orangefs_dev_major
= register_chrdev(0,
785 ORANGEFS_REQDEVICE_NAME
,
786 &orangefs_devreq_file_operations
);
787 if (orangefs_dev_major
< 0) {
788 gossip_debug(GOSSIP_DEV_DEBUG
,
789 "Failed to register /dev/%s (error %d)\n",
790 ORANGEFS_REQDEVICE_NAME
, orangefs_dev_major
);
791 return orangefs_dev_major
;
794 gossip_debug(GOSSIP_DEV_DEBUG
,
795 "*** /dev/%s character device registered ***\n",
796 ORANGEFS_REQDEVICE_NAME
);
797 gossip_debug(GOSSIP_DEV_DEBUG
, "'mknod /dev/%s c %d 0'.\n",
798 ORANGEFS_REQDEVICE_NAME
, orangefs_dev_major
);
802 void orangefs_dev_cleanup(void)
804 unregister_chrdev(orangefs_dev_major
, ORANGEFS_REQDEVICE_NAME
);
805 gossip_debug(GOSSIP_DEV_DEBUG
,
806 "*** /dev/%s character device unregistered ***\n",
807 ORANGEFS_REQDEVICE_NAME
);
810 static unsigned int orangefs_devreq_poll(struct file
*file
,
811 struct poll_table_struct
*poll_table
)
813 int poll_revent_mask
= 0;
815 poll_wait(file
, &orangefs_request_list_waitq
, poll_table
);
817 if (!list_empty(&orangefs_request_list
))
818 poll_revent_mask
|= POLL_IN
;
819 return poll_revent_mask
;
822 const struct file_operations orangefs_devreq_file_operations
= {
823 .owner
= THIS_MODULE
,
824 .read
= orangefs_devreq_read
,
825 .write_iter
= orangefs_devreq_write_iter
,
826 .open
= orangefs_devreq_open
,
827 .release
= orangefs_devreq_release
,
828 .unlocked_ioctl
= orangefs_devreq_ioctl
,
830 #ifdef CONFIG_COMPAT /* CONFIG_COMPAT is in .config */
831 .compat_ioctl
= orangefs_devreq_compat_ioctl
,
833 .poll
= orangefs_devreq_poll