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"
15 #include <linux/debugfs.h>
16 #include <linux/slab.h>
18 /* this file implements the /dev/pvfs2-req device node */
20 static int open_access_count
;
22 #define DUMP_DEVICE_ERROR() \
24 gossip_err("*****************************************************\n");\
25 gossip_err("ORANGEFS Device Error: You cannot open the device file "); \
26 gossip_err("\n/dev/%s more than once. Please make sure that\nthere " \
27 "are no ", ORANGEFS_REQDEVICE_NAME); \
28 gossip_err("instances of a program using this device\ncurrently " \
29 "running. (You must verify this!)\n"); \
30 gossip_err("For example, you can use the lsof program as follows:\n");\
31 gossip_err("'lsof | grep %s' (run this as root)\n", \
32 ORANGEFS_REQDEVICE_NAME); \
33 gossip_err(" open_access_count = %d\n", open_access_count); \
34 gossip_err("*****************************************************\n");\
37 static int hash_func(__u64 tag
, int table_size
)
39 return do_div(tag
, (unsigned int)table_size
);
42 static void orangefs_devreq_add_op(struct orangefs_kernel_op_s
*op
)
44 int index
= hash_func(op
->tag
, hash_table_size
);
46 spin_lock(&htable_ops_in_progress_lock
);
47 list_add_tail(&op
->list
, &htable_ops_in_progress
[index
]);
48 spin_unlock(&htable_ops_in_progress_lock
);
51 static struct orangefs_kernel_op_s
*orangefs_devreq_remove_op(__u64 tag
)
53 struct orangefs_kernel_op_s
*op
, *next
;
56 index
= hash_func(tag
, hash_table_size
);
58 spin_lock(&htable_ops_in_progress_lock
);
59 list_for_each_entry_safe(op
,
61 &htable_ops_in_progress
[index
],
65 spin_unlock(&htable_ops_in_progress_lock
);
70 spin_unlock(&htable_ops_in_progress_lock
);
74 static int orangefs_devreq_open(struct inode
*inode
, struct file
*file
)
78 if (!(file
->f_flags
& O_NONBLOCK
)) {
79 gossip_err("%s: device cannot be opened in blocking mode\n",
84 gossip_debug(GOSSIP_DEV_DEBUG
, "client-core: opening device\n");
85 mutex_lock(&devreq_mutex
);
87 if (open_access_count
== 0) {
93 mutex_unlock(&devreq_mutex
);
97 gossip_debug(GOSSIP_DEV_DEBUG
,
98 "pvfs2-client-core: open device complete (ret = %d)\n",
103 /* Function for read() callers into the device */
104 static ssize_t
orangefs_devreq_read(struct file
*file
,
106 size_t count
, loff_t
*offset
)
108 struct orangefs_kernel_op_s
*op
, *temp
;
109 __s32 proto_ver
= ORANGEFS_KERNEL_PROTO_VERSION
;
110 static __s32 magic
= ORANGEFS_DEVREQ_MAGIC
;
111 struct orangefs_kernel_op_s
*cur_op
= NULL
;
114 /* We do not support blocking IO. */
115 if (!(file
->f_flags
& O_NONBLOCK
)) {
116 gossip_err("%s: blocking read from client-core.\n",
122 * The client will do an ioctl to find MAX_DEV_REQ_UPSIZE, then
123 * always read with that size buffer.
125 if (count
!= MAX_DEV_REQ_UPSIZE
) {
126 gossip_err("orangefs: client-core tried to read wrong size\n");
130 /* Get next op (if any) from top of list. */
131 spin_lock(&orangefs_request_list_lock
);
132 list_for_each_entry_safe(op
, temp
, &orangefs_request_list
, list
) {
134 /* This lock is held past the end of the loop when we break. */
135 spin_lock(&op
->lock
);
137 fsid
= fsid_of_op(op
);
138 if (fsid
!= ORANGEFS_FS_ID_NULL
) {
140 /* Skip ops whose filesystem needs to be mounted. */
141 ret
= fs_mount_pending(fsid
);
143 gossip_debug(GOSSIP_DEV_DEBUG
,
144 "orangefs: skipping op tag %llu %s\n",
145 llu(op
->tag
), get_opname_string(op
));
146 spin_unlock(&op
->lock
);
149 * Skip ops whose filesystem we don't know about unless
150 * it is being mounted.
152 /* XXX: is there a better way to detect this? */
153 } else if (ret
== -1 &&
155 ORANGEFS_VFS_OP_FS_MOUNT
||
157 ORANGEFS_VFS_OP_GETATTR
)) {
158 gossip_debug(GOSSIP_DEV_DEBUG
,
159 "orangefs: skipping op tag %llu %s\n",
160 llu(op
->tag
), get_opname_string(op
));
162 "orangefs: ERROR: fs_mount_pending %d\n",
164 spin_unlock(&op
->lock
);
169 * Either this op does not pertain to a filesystem, is mounting
170 * a filesystem, or pertains to a mounted filesystem. Let it
178 * At this point we either have a valid op and can continue or have not
179 * found an op and must ask the client to try again later.
182 spin_unlock(&orangefs_request_list_lock
);
186 gossip_debug(GOSSIP_DEV_DEBUG
, "orangefs: reading op tag %llu %s\n",
187 llu(cur_op
->tag
), get_opname_string(cur_op
));
190 * Such an op should never be on the list in the first place. If so, we
193 if (op_state_in_progress(cur_op
) || op_state_serviced(cur_op
)) {
194 gossip_err("orangefs: ERROR: Current op already queued.\n");
195 list_del(&cur_op
->list
);
196 spin_unlock(&cur_op
->lock
);
197 spin_unlock(&orangefs_request_list_lock
);
202 * Set the operation to be in progress and move it between lists since
203 * it has been sent to the client.
205 set_op_state_inprogress(cur_op
);
207 list_del(&cur_op
->list
);
208 spin_unlock(&orangefs_request_list_lock
);
209 orangefs_devreq_add_op(cur_op
);
210 spin_unlock(&cur_op
->lock
);
212 /* Push the upcall out. */
213 ret
= copy_to_user(buf
, &proto_ver
, sizeof(__s32
));
216 ret
= copy_to_user(buf
+sizeof(__s32
), &magic
, sizeof(__s32
));
219 ret
= copy_to_user(buf
+2 * sizeof(__s32
), &cur_op
->tag
, sizeof(__u64
));
222 ret
= copy_to_user(buf
+2*sizeof(__s32
)+sizeof(__u64
), &cur_op
->upcall
,
223 sizeof(struct orangefs_upcall_s
));
227 /* The client only asks to read one size buffer. */
228 return MAX_DEV_REQ_UPSIZE
;
231 * We were unable to copy the op data to the client. Put the op back in
232 * list. If client has crashed, the op will be purged later when the
233 * device is released.
235 gossip_err("orangefs: Failed to copy data to user space\n");
236 spin_lock(&orangefs_request_list_lock
);
237 spin_lock(&cur_op
->lock
);
238 set_op_state_waiting(cur_op
);
239 orangefs_devreq_remove_op(cur_op
->tag
);
240 list_add(&cur_op
->list
, &orangefs_request_list
);
241 spin_unlock(&cur_op
->lock
);
242 spin_unlock(&orangefs_request_list_lock
);
247 * Function for writev() callers into the device.
249 * Userspace should have written:
253 * - struct orangefs_downcall_s
254 * - trailer buffer (in the case of READDIR operations)
256 static ssize_t
orangefs_devreq_write_iter(struct kiocb
*iocb
,
257 struct iov_iter
*iter
)
260 struct orangefs_kernel_op_s
*op
= NULL
;
266 int total
= ret
= iov_iter_count(iter
);
268 int downcall_size
= sizeof(struct orangefs_downcall_s
);
269 int head_size
= sizeof(head
);
271 gossip_debug(GOSSIP_DEV_DEBUG
, "%s: total:%d: ret:%zd:\n",
276 if (total
< MAX_DEV_REQ_DOWNSIZE
) {
277 gossip_err("%s: total:%d: must be at least:%u:\n",
280 (unsigned int) MAX_DEV_REQ_DOWNSIZE
);
285 n
= copy_from_iter(&head
, head_size
, iter
);
287 gossip_err("%s: failed to copy head.\n", __func__
);
292 if (head
.version
< ORANGEFS_MINIMUM_USERSPACE_VERSION
) {
293 gossip_err("%s: userspace claims version"
294 "%d, minimum version required: %d.\n",
297 ORANGEFS_MINIMUM_USERSPACE_VERSION
);
302 if (head
.magic
!= ORANGEFS_DEVREQ_MAGIC
) {
303 gossip_err("Error: Device magic number does not match.\n");
308 op
= orangefs_devreq_remove_op(head
.tag
);
310 gossip_err("WARNING: No one's waiting for tag %llu\n",
315 get_op(op
); /* increase ref count. */
317 n
= copy_from_iter(&op
->downcall
, downcall_size
, iter
);
318 if (n
!= downcall_size
) {
319 gossip_err("%s: failed to copy downcall.\n", __func__
);
325 if (op
->downcall
.status
)
329 * We've successfully peeled off the head and the downcall.
330 * Something has gone awry if total doesn't equal the
331 * sum of head_size, downcall_size and trailer_size.
333 if ((head_size
+ downcall_size
+ op
->downcall
.trailer_size
) != total
) {
334 gossip_err("%s: funky write, head_size:%d"
335 ": downcall_size:%d: trailer_size:%lld"
336 ": total size:%d:\n",
340 op
->downcall
.trailer_size
,
347 /* Only READDIR operations should have trailers. */
348 if ((op
->downcall
.type
!= ORANGEFS_VFS_OP_READDIR
) &&
349 (op
->downcall
.trailer_size
!= 0)) {
350 gossip_err("%s: %x operation with trailer.",
358 /* READDIR operations should always have trailers. */
359 if ((op
->downcall
.type
== ORANGEFS_VFS_OP_READDIR
) &&
360 (op
->downcall
.trailer_size
== 0)) {
361 gossip_err("%s: %x operation with no trailer.",
369 if (op
->downcall
.type
!= ORANGEFS_VFS_OP_READDIR
)
372 op
->downcall
.trailer_buf
=
373 vmalloc(op
->downcall
.trailer_size
);
374 if (op
->downcall
.trailer_buf
== NULL
) {
375 gossip_err("%s: failed trailer vmalloc.\n",
381 memset(op
->downcall
.trailer_buf
, 0, op
->downcall
.trailer_size
);
382 n
= copy_from_iter(op
->downcall
.trailer_buf
,
383 op
->downcall
.trailer_size
,
385 if (n
!= op
->downcall
.trailer_size
) {
386 gossip_err("%s: failed to copy trailer.\n", __func__
);
387 vfree(op
->downcall
.trailer_buf
);
396 * If this operation is an I/O operation we need to wait
397 * for all data to be copied before we can return to avoid
398 * buffer corruption and races that can pull the buffers
401 * Essentially we're synchronizing with other parts of the
402 * vfs implicitly by not allowing the user space
403 * application reading/writing this device to return until
404 * the buffers are done being used.
406 if (op
->downcall
.type
== ORANGEFS_VFS_OP_FILE_IO
) {
408 DEFINE_WAIT(wait_entry
);
411 * tell the vfs op waiting on a waitqueue
412 * that this op is done
414 spin_lock(&op
->lock
);
415 set_op_state_serviced(op
);
416 spin_unlock(&op
->lock
);
418 wake_up_interruptible(&op
->waitq
);
421 spin_lock(&op
->lock
);
422 prepare_to_wait_exclusive(
423 &op
->io_completion_waitq
,
426 if (op
->io_completed
) {
427 spin_unlock(&op
->lock
);
430 spin_unlock(&op
->lock
);
432 if (!signal_pending(current
)) {
434 MSECS_TO_JIFFIES(1000 *
436 if (!schedule_timeout(timeout
)) {
437 gossip_debug(GOSSIP_DEV_DEBUG
,
446 gossip_debug(GOSSIP_DEV_DEBUG
,
447 "%s: signal on I/O wait, aborting\n",
452 spin_lock(&op
->lock
);
453 finish_wait(&op
->io_completion_waitq
, &wait_entry
);
454 spin_unlock(&op
->lock
);
456 /* NOTE: for I/O operations we handle releasing the op
457 * object except in the case of timeout. the reason we
458 * can't free the op in timeout cases is that the op
459 * service logic in the vfs retries operations using
460 * the same op ptr, thus it can't be freed.
466 * tell the vfs op waiting on a waitqueue that
469 spin_lock(&op
->lock
);
470 set_op_state_serviced(op
);
471 spin_unlock(&op
->lock
);
473 * for every other operation (i.e. non-I/O), we need to
474 * wake up the callers for downcall completion
477 wake_up_interruptible(&op
->waitq
);
483 /* Returns whether any FS are still pending remounted */
484 static int mark_all_pending_mounts(void)
487 struct orangefs_sb_info_s
*orangefs_sb
= NULL
;
489 spin_lock(&orangefs_superblocks_lock
);
490 list_for_each_entry(orangefs_sb
, &orangefs_superblocks
, list
) {
491 /* All of these file system require a remount */
492 orangefs_sb
->mount_pending
= 1;
495 spin_unlock(&orangefs_superblocks_lock
);
500 * Determine if a given file system needs to be remounted or not
501 * Returns -1 on error
502 * 0 if already mounted
505 int fs_mount_pending(__s32 fsid
)
507 int mount_pending
= -1;
508 struct orangefs_sb_info_s
*orangefs_sb
= NULL
;
510 spin_lock(&orangefs_superblocks_lock
);
511 list_for_each_entry(orangefs_sb
, &orangefs_superblocks
, list
) {
512 if (orangefs_sb
->fs_id
== fsid
) {
513 mount_pending
= orangefs_sb
->mount_pending
;
517 spin_unlock(&orangefs_superblocks_lock
);
518 return mount_pending
;
522 * NOTE: gets called when the last reference to this device is dropped.
523 * Using the open_access_count variable, we enforce a reference count
524 * on this file so that it can be opened by only one process at a time.
525 * the devreq_mutex is used to make sure all i/o has completed
526 * before we call orangefs_bufmap_finalize, and similar such tricky
529 static int orangefs_devreq_release(struct inode
*inode
, struct file
*file
)
533 gossip_debug(GOSSIP_DEV_DEBUG
,
534 "%s:pvfs2-client-core: exiting, closing device\n",
537 mutex_lock(&devreq_mutex
);
538 if (orangefs_get_bufmap_init())
539 orangefs_bufmap_finalize();
543 unmounted
= mark_all_pending_mounts();
544 gossip_debug(GOSSIP_DEV_DEBUG
, "ORANGEFS Device Close: Filesystem(s) %s\n",
545 (unmounted
? "UNMOUNTED" : "MOUNTED"));
546 mutex_unlock(&devreq_mutex
);
549 * Walk through the list of ops in the request list, mark them
550 * as purged and wake them up.
554 * Walk through the hash table of in progress operations; mark
555 * them as purged and wake them up
557 purge_inprogress_ops();
558 gossip_debug(GOSSIP_DEV_DEBUG
,
559 "pvfs2-client-core: device close complete\n");
563 int is_daemon_in_service(void)
568 * What this function does is checks if client-core is alive
569 * based on the access count we maintain on the device.
571 mutex_lock(&devreq_mutex
);
572 in_service
= open_access_count
== 1 ? 0 : -EIO
;
573 mutex_unlock(&devreq_mutex
);
577 static inline long check_ioctl_command(unsigned int command
)
579 /* Check for valid ioctl codes */
580 if (_IOC_TYPE(command
) != ORANGEFS_DEV_MAGIC
) {
581 gossip_err("device ioctl magic numbers don't match! Did you rebuild pvfs2-client-core/libpvfs2? [cmd %x, magic %x != %x]\n",
587 /* and valid ioctl commands */
588 if (_IOC_NR(command
) >= ORANGEFS_DEV_MAXNR
|| _IOC_NR(command
) <= 0) {
589 gossip_err("Invalid ioctl command number [%d >= %d]\n",
590 _IOC_NR(command
), ORANGEFS_DEV_MAXNR
);
596 static long dispatch_ioctl_command(unsigned int command
, unsigned long arg
)
598 static __s32 magic
= ORANGEFS_DEVREQ_MAGIC
;
599 static __s32 max_up_size
= MAX_DEV_REQ_UPSIZE
;
600 static __s32 max_down_size
= MAX_DEV_REQ_DOWNSIZE
;
601 struct ORANGEFS_dev_map_desc user_desc
;
603 struct dev_mask_info_s mask_info
= { 0 };
604 struct dev_mask2_info_s mask2_info
= { 0, 0 };
605 int upstream_kmod
= 1;
606 struct list_head
*tmp
= NULL
;
607 struct orangefs_sb_info_s
*orangefs_sb
= NULL
;
609 /* mtmoore: add locking here */
612 case ORANGEFS_DEV_GET_MAGIC
:
613 return ((put_user(magic
, (__s32 __user
*) arg
) == -EFAULT
) ?
616 case ORANGEFS_DEV_GET_MAX_UPSIZE
:
617 return ((put_user(max_up_size
,
618 (__s32 __user
*) arg
) == -EFAULT
) ?
621 case ORANGEFS_DEV_GET_MAX_DOWNSIZE
:
622 return ((put_user(max_down_size
,
623 (__s32 __user
*) arg
) == -EFAULT
) ?
626 case ORANGEFS_DEV_MAP
:
627 ret
= copy_from_user(&user_desc
,
628 (struct ORANGEFS_dev_map_desc __user
*)
630 sizeof(struct ORANGEFS_dev_map_desc
));
631 if (orangefs_get_bufmap_init()) {
636 orangefs_bufmap_initialize(&user_desc
);
638 case ORANGEFS_DEV_REMOUNT_ALL
:
639 gossip_debug(GOSSIP_DEV_DEBUG
,
640 "%s: got ORANGEFS_DEV_REMOUNT_ALL\n",
644 * remount all mounted orangefs volumes to regain the lost
645 * dynamic mount tables (if any) -- NOTE: this is done
646 * without keeping the superblock list locked due to the
647 * upcall/downcall waiting. also, the request semaphore is
648 * used to ensure that no operations will be serviced until
649 * all of the remounts are serviced (to avoid ops between
652 ret
= mutex_lock_interruptible(&request_mutex
);
655 gossip_debug(GOSSIP_DEV_DEBUG
,
656 "%s: priority remount in progress\n",
658 list_for_each(tmp
, &orangefs_superblocks
) {
661 struct orangefs_sb_info_s
,
663 if (orangefs_sb
&& (orangefs_sb
->sb
)) {
664 gossip_debug(GOSSIP_DEV_DEBUG
,
665 "%s: Remounting SB %p\n",
669 ret
= orangefs_remount(orangefs_sb
->sb
);
671 gossip_debug(GOSSIP_DEV_DEBUG
,
672 "SB %p remount failed\n",
678 gossip_debug(GOSSIP_DEV_DEBUG
,
679 "%s: priority remount complete\n",
681 mutex_unlock(&request_mutex
);
684 case ORANGEFS_DEV_UPSTREAM
:
685 ret
= copy_to_user((void __user
*)arg
,
687 sizeof(upstream_kmod
));
694 case ORANGEFS_DEV_CLIENT_MASK
:
695 ret
= copy_from_user(&mask2_info
,
697 sizeof(struct dev_mask2_info_s
));
702 client_debug_mask
.mask1
= mask2_info
.mask1_value
;
703 client_debug_mask
.mask2
= mask2_info
.mask2_value
;
705 pr_info("%s: client debug mask has been been received "
708 (unsigned long long)client_debug_mask
.mask1
,
709 (unsigned long long)client_debug_mask
.mask2
);
713 case ORANGEFS_DEV_CLIENT_STRING
:
714 ret
= copy_from_user(&client_debug_array_string
,
716 ORANGEFS_MAX_DEBUG_STRING_LEN
);
718 pr_info("%s: CLIENT_STRING: copy_from_user failed\n",
723 pr_info("%s: client debug array string has been received.\n",
726 if (!help_string_initialized
) {
728 /* Free the "we don't know yet" default string... */
729 kfree(debug_help_string
);
731 /* build a proper debug help string */
732 if (orangefs_prepare_debugfs_help_string(0)) {
733 gossip_err("%s: no debug help string \n",
738 /* Replace the boilerplate boot-time debug-help file. */
739 debugfs_remove(help_file_dentry
);
743 ORANGEFS_KMOD_DEBUG_HELP_FILE
,
749 if (!help_file_dentry
) {
750 gossip_err("%s: debugfs_create_file failed for"
753 ORANGEFS_KMOD_DEBUG_HELP_FILE
);
758 debug_mask_to_string(&client_debug_mask
, 1);
760 debugfs_remove(client_debug_dentry
);
762 orangefs_client_debug_init();
764 help_string_initialized
++;
768 case ORANGEFS_DEV_DEBUG
:
769 ret
= copy_from_user(&mask_info
,
776 if (mask_info
.mask_type
== KERNEL_MASK
) {
777 if ((mask_info
.mask_value
== 0)
778 && (kernel_mask_set_mod_init
)) {
780 * the kernel debug mask was set when the
781 * kernel module was loaded; don't override
782 * it if the client-core was started without
783 * a value for ORANGEFS_KMODMASK.
787 debug_mask_to_string(&mask_info
.mask_value
,
788 mask_info
.mask_type
);
789 gossip_debug_mask
= mask_info
.mask_value
;
790 pr_info("%s: kernel debug mask has been modified to "
794 (unsigned long long)gossip_debug_mask
);
795 } else if (mask_info
.mask_type
== CLIENT_MASK
) {
796 debug_mask_to_string(&mask_info
.mask_value
,
797 mask_info
.mask_type
);
798 pr_info("%s: client debug mask has been modified to"
802 llu(mask_info
.mask_value
));
804 gossip_lerr("Invalid mask type....\n");
816 static long orangefs_devreq_ioctl(struct file
*file
,
817 unsigned int command
, unsigned long arg
)
821 /* Check for properly constructed commands */
822 ret
= check_ioctl_command(command
);
826 return (int)dispatch_ioctl_command(command
, arg
);
829 #ifdef CONFIG_COMPAT /* CONFIG_COMPAT is in .config */
831 /* Compat structure for the ORANGEFS_DEV_MAP ioctl */
832 struct ORANGEFS_dev_map_desc32
{
839 static unsigned long translate_dev_map26(unsigned long args
, long *error
)
841 struct ORANGEFS_dev_map_desc32 __user
*p32
= (void __user
*)args
;
843 * Depending on the architecture, allocate some space on the
844 * user-call-stack based on our expected layout.
846 struct ORANGEFS_dev_map_desc __user
*p
=
847 compat_alloc_user_space(sizeof(*p
));
851 /* get the ptr from the 32 bit user-space */
852 if (get_user(addr
, &p32
->ptr
))
854 /* try to put that into a 64-bit layout */
855 if (put_user(compat_ptr(addr
), &p
->ptr
))
857 /* copy the remaining fields */
858 if (copy_in_user(&p
->total_size
, &p32
->total_size
, sizeof(__s32
)))
860 if (copy_in_user(&p
->size
, &p32
->size
, sizeof(__s32
)))
862 if (copy_in_user(&p
->count
, &p32
->count
, sizeof(__s32
)))
864 return (unsigned long)p
;
871 * 32 bit user-space apps' ioctl handlers when kernel modules
872 * is compiled as a 64 bit one
874 static long orangefs_devreq_compat_ioctl(struct file
*filp
, unsigned int cmd
,
878 unsigned long arg
= args
;
880 /* Check for properly constructed commands */
881 ret
= check_ioctl_command(cmd
);
884 if (cmd
== ORANGEFS_DEV_MAP
) {
886 * convert the arguments to what we expect internally
889 arg
= translate_dev_map26(args
, &ret
);
891 gossip_err("Could not translate dev map\n");
895 /* no other ioctl requires translation */
896 return dispatch_ioctl_command(cmd
, arg
);
899 #endif /* CONFIG_COMPAT is in .config */
901 /* the assigned character device major number */
902 static int orangefs_dev_major
;
905 * Initialize orangefs device specific state:
906 * Must be called at module load time only
908 int orangefs_dev_init(void)
910 /* register orangefs-req device */
911 orangefs_dev_major
= register_chrdev(0,
912 ORANGEFS_REQDEVICE_NAME
,
913 &orangefs_devreq_file_operations
);
914 if (orangefs_dev_major
< 0) {
915 gossip_debug(GOSSIP_DEV_DEBUG
,
916 "Failed to register /dev/%s (error %d)\n",
917 ORANGEFS_REQDEVICE_NAME
, orangefs_dev_major
);
918 return orangefs_dev_major
;
921 gossip_debug(GOSSIP_DEV_DEBUG
,
922 "*** /dev/%s character device registered ***\n",
923 ORANGEFS_REQDEVICE_NAME
);
924 gossip_debug(GOSSIP_DEV_DEBUG
, "'mknod /dev/%s c %d 0'.\n",
925 ORANGEFS_REQDEVICE_NAME
, orangefs_dev_major
);
929 void orangefs_dev_cleanup(void)
931 unregister_chrdev(orangefs_dev_major
, ORANGEFS_REQDEVICE_NAME
);
932 gossip_debug(GOSSIP_DEV_DEBUG
,
933 "*** /dev/%s character device unregistered ***\n",
934 ORANGEFS_REQDEVICE_NAME
);
937 static unsigned int orangefs_devreq_poll(struct file
*file
,
938 struct poll_table_struct
*poll_table
)
940 int poll_revent_mask
= 0;
942 poll_wait(file
, &orangefs_request_list_waitq
, poll_table
);
944 if (!list_empty(&orangefs_request_list
))
945 poll_revent_mask
|= POLL_IN
;
946 return poll_revent_mask
;
949 const struct file_operations orangefs_devreq_file_operations
= {
950 .owner
= THIS_MODULE
,
951 .read
= orangefs_devreq_read
,
952 .write_iter
= orangefs_devreq_write_iter
,
953 .open
= orangefs_devreq_open
,
954 .release
= orangefs_devreq_release
,
955 .unlocked_ioctl
= orangefs_devreq_ioctl
,
957 #ifdef CONFIG_COMPAT /* CONFIG_COMPAT is in .config */
958 .compat_ioctl
= orangefs_devreq_compat_ioctl
,
960 .poll
= orangefs_devreq_poll