2 * Copyright (c) 2005 Topspin Communications. All rights reserved.
3 * Copyright (c) 2005 Cisco Systems. All rights reserved.
4 * Copyright (c) 2005 Mellanox Technologies. All rights reserved.
5 * Copyright (c) 2005 Voltaire, Inc. All rights reserved.
7 * This software is available to you under a choice of one of two
8 * licenses. You may choose to be licensed under the terms of the GNU
9 * General Public License (GPL) Version 2, available from the file
10 * COPYING in the main directory of this source tree, or the
11 * OpenIB.org BSD license below:
13 * Redistribution and use in source and binary forms, with or
14 * without modification, are permitted provided that the following
17 * - Redistributions of source code must retain the above
18 * copyright notice, this list of conditions and the following
21 * - Redistributions in binary form must reproduce the above
22 * copyright notice, this list of conditions and the following
23 * disclaimer in the documentation and/or other materials
24 * provided with the distribution.
26 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
27 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
28 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
29 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
30 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
31 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
32 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
35 * $Id: uverbs_main.c 2733 2005-06-28 19:14:34Z roland $
38 #include <linux/module.h>
39 #include <linux/init.h>
40 #include <linux/device.h>
41 #include <linux/err.h>
43 #include <linux/poll.h>
44 #include <linux/file.h>
45 #include <linux/mount.h>
47 #include <asm/uaccess.h>
51 MODULE_AUTHOR("Roland Dreier");
52 MODULE_DESCRIPTION("InfiniBand userspace verbs access");
53 MODULE_LICENSE("Dual BSD/GPL");
55 #define INFINIBANDEVENTFS_MAGIC 0x49426576 /* "IBev" */
58 IB_UVERBS_MAJOR
= 231,
59 IB_UVERBS_BASE_MINOR
= 192,
60 IB_UVERBS_MAX_DEVICES
= 32
63 #define IB_UVERBS_BASE_DEV MKDEV(IB_UVERBS_MAJOR, IB_UVERBS_BASE_MINOR)
65 DECLARE_MUTEX(ib_uverbs_idr_mutex
);
66 DEFINE_IDR(ib_uverbs_pd_idr
);
67 DEFINE_IDR(ib_uverbs_mr_idr
);
68 DEFINE_IDR(ib_uverbs_mw_idr
);
69 DEFINE_IDR(ib_uverbs_ah_idr
);
70 DEFINE_IDR(ib_uverbs_cq_idr
);
71 DEFINE_IDR(ib_uverbs_qp_idr
);
72 DEFINE_IDR(ib_uverbs_srq_idr
);
74 static spinlock_t map_lock
;
75 static DECLARE_BITMAP(dev_map
, IB_UVERBS_MAX_DEVICES
);
77 static ssize_t (*uverbs_cmd_table
[])(struct ib_uverbs_file
*file
,
78 const char __user
*buf
, int in_len
,
80 [IB_USER_VERBS_CMD_GET_CONTEXT
] = ib_uverbs_get_context
,
81 [IB_USER_VERBS_CMD_QUERY_DEVICE
] = ib_uverbs_query_device
,
82 [IB_USER_VERBS_CMD_QUERY_PORT
] = ib_uverbs_query_port
,
83 [IB_USER_VERBS_CMD_ALLOC_PD
] = ib_uverbs_alloc_pd
,
84 [IB_USER_VERBS_CMD_DEALLOC_PD
] = ib_uverbs_dealloc_pd
,
85 [IB_USER_VERBS_CMD_REG_MR
] = ib_uverbs_reg_mr
,
86 [IB_USER_VERBS_CMD_DEREG_MR
] = ib_uverbs_dereg_mr
,
87 [IB_USER_VERBS_CMD_CREATE_COMP_CHANNEL
] = ib_uverbs_create_comp_channel
,
88 [IB_USER_VERBS_CMD_CREATE_CQ
] = ib_uverbs_create_cq
,
89 [IB_USER_VERBS_CMD_DESTROY_CQ
] = ib_uverbs_destroy_cq
,
90 [IB_USER_VERBS_CMD_CREATE_QP
] = ib_uverbs_create_qp
,
91 [IB_USER_VERBS_CMD_MODIFY_QP
] = ib_uverbs_modify_qp
,
92 [IB_USER_VERBS_CMD_DESTROY_QP
] = ib_uverbs_destroy_qp
,
93 [IB_USER_VERBS_CMD_ATTACH_MCAST
] = ib_uverbs_attach_mcast
,
94 [IB_USER_VERBS_CMD_DETACH_MCAST
] = ib_uverbs_detach_mcast
,
95 [IB_USER_VERBS_CMD_CREATE_SRQ
] = ib_uverbs_create_srq
,
96 [IB_USER_VERBS_CMD_MODIFY_SRQ
] = ib_uverbs_modify_srq
,
97 [IB_USER_VERBS_CMD_DESTROY_SRQ
] = ib_uverbs_destroy_srq
,
100 static struct vfsmount
*uverbs_event_mnt
;
102 static void ib_uverbs_add_one(struct ib_device
*device
);
103 static void ib_uverbs_remove_one(struct ib_device
*device
);
105 static int ib_dealloc_ucontext(struct ib_ucontext
*context
)
107 struct ib_uobject
*uobj
, *tmp
;
112 down(&ib_uverbs_idr_mutex
);
116 list_for_each_entry_safe(uobj
, tmp
, &context
->qp_list
, list
) {
117 struct ib_qp
*qp
= idr_find(&ib_uverbs_qp_idr
, uobj
->id
);
118 idr_remove(&ib_uverbs_qp_idr
, uobj
->id
);
120 list_del(&uobj
->list
);
121 kfree(container_of(uobj
, struct ib_uevent_object
, uobject
));
124 list_for_each_entry_safe(uobj
, tmp
, &context
->cq_list
, list
) {
125 struct ib_cq
*cq
= idr_find(&ib_uverbs_cq_idr
, uobj
->id
);
126 idr_remove(&ib_uverbs_cq_idr
, uobj
->id
);
128 list_del(&uobj
->list
);
129 kfree(container_of(uobj
, struct ib_ucq_object
, uobject
));
132 list_for_each_entry_safe(uobj
, tmp
, &context
->srq_list
, list
) {
133 struct ib_srq
*srq
= idr_find(&ib_uverbs_srq_idr
, uobj
->id
);
134 idr_remove(&ib_uverbs_srq_idr
, uobj
->id
);
136 list_del(&uobj
->list
);
137 kfree(container_of(uobj
, struct ib_uevent_object
, uobject
));
142 list_for_each_entry_safe(uobj
, tmp
, &context
->mr_list
, list
) {
143 struct ib_mr
*mr
= idr_find(&ib_uverbs_mr_idr
, uobj
->id
);
144 struct ib_device
*mrdev
= mr
->device
;
145 struct ib_umem_object
*memobj
;
147 idr_remove(&ib_uverbs_mr_idr
, uobj
->id
);
150 memobj
= container_of(uobj
, struct ib_umem_object
, uobject
);
151 ib_umem_release_on_close(mrdev
, &memobj
->umem
);
153 list_del(&uobj
->list
);
157 list_for_each_entry_safe(uobj
, tmp
, &context
->pd_list
, list
) {
158 struct ib_pd
*pd
= idr_find(&ib_uverbs_pd_idr
, uobj
->id
);
159 idr_remove(&ib_uverbs_pd_idr
, uobj
->id
);
161 list_del(&uobj
->list
);
165 up(&ib_uverbs_idr_mutex
);
167 return context
->device
->dealloc_ucontext(context
);
170 static void ib_uverbs_release_file(struct kref
*ref
)
172 struct ib_uverbs_file
*file
=
173 container_of(ref
, struct ib_uverbs_file
, ref
);
175 module_put(file
->device
->ib_dev
->owner
);
179 static ssize_t
ib_uverbs_event_read(struct file
*filp
, char __user
*buf
,
180 size_t count
, loff_t
*pos
)
182 struct ib_uverbs_event_file
*file
= filp
->private_data
;
183 struct ib_uverbs_event
*event
;
187 spin_lock_irq(&file
->lock
);
189 while (list_empty(&file
->event_list
)) {
190 spin_unlock_irq(&file
->lock
);
192 if (filp
->f_flags
& O_NONBLOCK
)
195 if (wait_event_interruptible(file
->poll_wait
,
196 !list_empty(&file
->event_list
)))
199 spin_lock_irq(&file
->lock
);
202 event
= list_entry(file
->event_list
.next
, struct ib_uverbs_event
, list
);
205 eventsz
= sizeof (struct ib_uverbs_async_event_desc
);
207 eventsz
= sizeof (struct ib_uverbs_comp_event_desc
);
209 if (eventsz
> count
) {
213 list_del(file
->event_list
.next
);
214 if (event
->counter
) {
216 list_del(&event
->obj_list
);
220 spin_unlock_irq(&file
->lock
);
223 if (copy_to_user(buf
, event
, eventsz
))
234 static unsigned int ib_uverbs_event_poll(struct file
*filp
,
235 struct poll_table_struct
*wait
)
237 unsigned int pollflags
= 0;
238 struct ib_uverbs_event_file
*file
= filp
->private_data
;
240 poll_wait(filp
, &file
->poll_wait
, wait
);
242 spin_lock_irq(&file
->lock
);
243 if (!list_empty(&file
->event_list
))
244 pollflags
= POLLIN
| POLLRDNORM
;
245 spin_unlock_irq(&file
->lock
);
250 void ib_uverbs_release_event_file(struct kref
*ref
)
252 struct ib_uverbs_event_file
*file
=
253 container_of(ref
, struct ib_uverbs_event_file
, ref
);
258 static int ib_uverbs_event_fasync(int fd
, struct file
*filp
, int on
)
260 struct ib_uverbs_event_file
*file
= filp
->private_data
;
262 return fasync_helper(fd
, filp
, on
, &file
->async_queue
);
265 static int ib_uverbs_event_close(struct inode
*inode
, struct file
*filp
)
267 struct ib_uverbs_event_file
*file
= filp
->private_data
;
268 struct ib_uverbs_event
*entry
, *tmp
;
270 spin_lock_irq(&file
->lock
);
272 list_for_each_entry_safe(entry
, tmp
, &file
->event_list
, list
) {
274 list_del(&entry
->obj_list
);
277 spin_unlock_irq(&file
->lock
);
279 ib_uverbs_event_fasync(-1, filp
, 0);
281 if (file
->is_async
) {
282 ib_unregister_event_handler(&file
->uverbs_file
->event_handler
);
283 kref_put(&file
->uverbs_file
->ref
, ib_uverbs_release_file
);
285 kref_put(&file
->ref
, ib_uverbs_release_event_file
);
290 static struct file_operations uverbs_event_fops
= {
291 .owner
= THIS_MODULE
,
292 .read
= ib_uverbs_event_read
,
293 .poll
= ib_uverbs_event_poll
,
294 .release
= ib_uverbs_event_close
,
295 .fasync
= ib_uverbs_event_fasync
298 void ib_uverbs_comp_handler(struct ib_cq
*cq
, void *cq_context
)
300 struct ib_uverbs_event_file
*file
= cq_context
;
301 struct ib_ucq_object
*uobj
;
302 struct ib_uverbs_event
*entry
;
308 spin_lock_irqsave(&file
->lock
, flags
);
310 spin_unlock_irqrestore(&file
->lock
, flags
);
314 entry
= kmalloc(sizeof *entry
, GFP_ATOMIC
);
316 spin_unlock_irqrestore(&file
->lock
, flags
);
320 uobj
= container_of(cq
->uobject
, struct ib_ucq_object
, uobject
);
322 entry
->desc
.comp
.cq_handle
= cq
->uobject
->user_handle
;
323 entry
->counter
= &uobj
->comp_events_reported
;
325 list_add_tail(&entry
->list
, &file
->event_list
);
326 list_add_tail(&entry
->obj_list
, &uobj
->comp_list
);
327 spin_unlock_irqrestore(&file
->lock
, flags
);
329 wake_up_interruptible(&file
->poll_wait
);
330 kill_fasync(&file
->async_queue
, SIGIO
, POLL_IN
);
333 static void ib_uverbs_async_handler(struct ib_uverbs_file
*file
,
334 __u64 element
, __u64 event
,
335 struct list_head
*obj_list
,
338 struct ib_uverbs_event
*entry
;
341 spin_lock_irqsave(&file
->async_file
->lock
, flags
);
342 if (!file
->async_file
->file
) {
343 spin_unlock_irqrestore(&file
->async_file
->lock
, flags
);
347 entry
= kmalloc(sizeof *entry
, GFP_ATOMIC
);
349 spin_unlock_irqrestore(&file
->async_file
->lock
, flags
);
353 entry
->desc
.async
.element
= element
;
354 entry
->desc
.async
.event_type
= event
;
355 entry
->counter
= counter
;
357 list_add_tail(&entry
->list
, &file
->async_file
->event_list
);
359 list_add_tail(&entry
->obj_list
, obj_list
);
360 spin_unlock_irqrestore(&file
->async_file
->lock
, flags
);
362 wake_up_interruptible(&file
->async_file
->poll_wait
);
363 kill_fasync(&file
->async_file
->async_queue
, SIGIO
, POLL_IN
);
366 void ib_uverbs_cq_event_handler(struct ib_event
*event
, void *context_ptr
)
368 struct ib_uverbs_event_file
*ev_file
= context_ptr
;
369 struct ib_ucq_object
*uobj
;
371 uobj
= container_of(event
->element
.cq
->uobject
,
372 struct ib_ucq_object
, uobject
);
374 ib_uverbs_async_handler(ev_file
->uverbs_file
, uobj
->uobject
.user_handle
,
375 event
->event
, &uobj
->async_list
,
376 &uobj
->async_events_reported
);
380 void ib_uverbs_qp_event_handler(struct ib_event
*event
, void *context_ptr
)
382 struct ib_uevent_object
*uobj
;
384 uobj
= container_of(event
->element
.qp
->uobject
,
385 struct ib_uevent_object
, uobject
);
387 ib_uverbs_async_handler(context_ptr
, uobj
->uobject
.user_handle
,
388 event
->event
, &uobj
->event_list
,
389 &uobj
->events_reported
);
392 void ib_uverbs_srq_event_handler(struct ib_event
*event
, void *context_ptr
)
394 struct ib_uevent_object
*uobj
;
396 uobj
= container_of(event
->element
.srq
->uobject
,
397 struct ib_uevent_object
, uobject
);
399 ib_uverbs_async_handler(context_ptr
, uobj
->uobject
.user_handle
,
400 event
->event
, &uobj
->event_list
,
401 &uobj
->events_reported
);
404 void ib_uverbs_event_handler(struct ib_event_handler
*handler
,
405 struct ib_event
*event
)
407 struct ib_uverbs_file
*file
=
408 container_of(handler
, struct ib_uverbs_file
, event_handler
);
410 ib_uverbs_async_handler(file
, event
->element
.port_num
, event
->event
,
414 struct file
*ib_uverbs_alloc_event_file(struct ib_uverbs_file
*uverbs_file
,
415 int is_async
, int *fd
)
417 struct ib_uverbs_event_file
*ev_file
;
421 ev_file
= kmalloc(sizeof *ev_file
, GFP_KERNEL
);
423 return ERR_PTR(-ENOMEM
);
425 kref_init(&ev_file
->ref
);
426 spin_lock_init(&ev_file
->lock
);
427 INIT_LIST_HEAD(&ev_file
->event_list
);
428 init_waitqueue_head(&ev_file
->poll_wait
);
429 ev_file
->uverbs_file
= uverbs_file
;
430 ev_file
->async_queue
= NULL
;
431 ev_file
->is_async
= is_async
;
433 *fd
= get_unused_fd();
439 filp
= get_empty_filp();
445 ev_file
->file
= filp
;
448 * fops_get() can't fail here, because we're coming from a
449 * system call on a uverbs file, which will already have a
452 filp
->f_op
= fops_get(&uverbs_event_fops
);
453 filp
->f_vfsmnt
= mntget(uverbs_event_mnt
);
454 filp
->f_dentry
= dget(uverbs_event_mnt
->mnt_root
);
455 filp
->f_mapping
= filp
->f_dentry
->d_inode
->i_mapping
;
456 filp
->f_flags
= O_RDONLY
;
457 filp
->f_mode
= FMODE_READ
;
458 filp
->private_data
= ev_file
;
471 * Look up a completion event file by FD. If lookup is successful,
472 * takes a ref to the event file struct that it returns; if
473 * unsuccessful, returns NULL.
475 struct ib_uverbs_event_file
*ib_uverbs_lookup_comp_file(int fd
)
477 struct ib_uverbs_event_file
*ev_file
= NULL
;
484 if (filp
->f_op
!= &uverbs_event_fops
)
487 ev_file
= filp
->private_data
;
488 if (ev_file
->is_async
) {
493 kref_get(&ev_file
->ref
);
500 static ssize_t
ib_uverbs_write(struct file
*filp
, const char __user
*buf
,
501 size_t count
, loff_t
*pos
)
503 struct ib_uverbs_file
*file
= filp
->private_data
;
504 struct ib_uverbs_cmd_hdr hdr
;
506 if (count
< sizeof hdr
)
509 if (copy_from_user(&hdr
, buf
, sizeof hdr
))
512 if (hdr
.in_words
* 4 != count
)
515 if (hdr
.command
< 0 ||
516 hdr
.command
>= ARRAY_SIZE(uverbs_cmd_table
) ||
517 !uverbs_cmd_table
[hdr
.command
] ||
518 !(file
->device
->ib_dev
->uverbs_cmd_mask
& (1ull << hdr
.command
)))
521 if (!file
->ucontext
&&
522 hdr
.command
!= IB_USER_VERBS_CMD_GET_CONTEXT
)
525 return uverbs_cmd_table
[hdr
.command
](file
, buf
+ sizeof hdr
,
526 hdr
.in_words
* 4, hdr
.out_words
* 4);
529 static int ib_uverbs_mmap(struct file
*filp
, struct vm_area_struct
*vma
)
531 struct ib_uverbs_file
*file
= filp
->private_data
;
536 return file
->device
->ib_dev
->mmap(file
->ucontext
, vma
);
539 static int ib_uverbs_open(struct inode
*inode
, struct file
*filp
)
541 struct ib_uverbs_device
*dev
=
542 container_of(inode
->i_cdev
, struct ib_uverbs_device
, dev
);
543 struct ib_uverbs_file
*file
;
545 if (!try_module_get(dev
->ib_dev
->owner
))
548 file
= kmalloc(sizeof *file
, GFP_KERNEL
);
550 module_put(dev
->ib_dev
->owner
);
555 file
->ucontext
= NULL
;
556 kref_init(&file
->ref
);
557 init_MUTEX(&file
->mutex
);
559 filp
->private_data
= file
;
564 static int ib_uverbs_close(struct inode
*inode
, struct file
*filp
)
566 struct ib_uverbs_file
*file
= filp
->private_data
;
568 ib_dealloc_ucontext(file
->ucontext
);
570 kref_put(&file
->async_file
->ref
, ib_uverbs_release_event_file
);
571 kref_put(&file
->ref
, ib_uverbs_release_file
);
576 static struct file_operations uverbs_fops
= {
577 .owner
= THIS_MODULE
,
578 .write
= ib_uverbs_write
,
579 .open
= ib_uverbs_open
,
580 .release
= ib_uverbs_close
583 static struct file_operations uverbs_mmap_fops
= {
584 .owner
= THIS_MODULE
,
585 .write
= ib_uverbs_write
,
586 .mmap
= ib_uverbs_mmap
,
587 .open
= ib_uverbs_open
,
588 .release
= ib_uverbs_close
591 static struct ib_client uverbs_client
= {
593 .add
= ib_uverbs_add_one
,
594 .remove
= ib_uverbs_remove_one
597 static ssize_t
show_ibdev(struct class_device
*class_dev
, char *buf
)
599 struct ib_uverbs_device
*dev
=
600 container_of(class_dev
, struct ib_uverbs_device
, class_dev
);
602 return sprintf(buf
, "%s\n", dev
->ib_dev
->name
);
604 static CLASS_DEVICE_ATTR(ibdev
, S_IRUGO
, show_ibdev
, NULL
);
606 static ssize_t
show_dev_abi_version(struct class_device
*class_dev
, char *buf
)
608 struct ib_uverbs_device
*dev
=
609 container_of(class_dev
, struct ib_uverbs_device
, class_dev
);
611 return sprintf(buf
, "%d\n", dev
->ib_dev
->uverbs_abi_ver
);
613 static CLASS_DEVICE_ATTR(abi_version
, S_IRUGO
, show_dev_abi_version
, NULL
);
615 static void ib_uverbs_release_class_dev(struct class_device
*class_dev
)
617 struct ib_uverbs_device
*dev
=
618 container_of(class_dev
, struct ib_uverbs_device
, class_dev
);
621 clear_bit(dev
->devnum
, dev_map
);
625 static struct class uverbs_class
= {
626 .name
= "infiniband_verbs",
627 .release
= ib_uverbs_release_class_dev
630 static ssize_t
show_abi_version(struct class *class, char *buf
)
632 return sprintf(buf
, "%d\n", IB_USER_VERBS_ABI_VERSION
);
634 static CLASS_ATTR(abi_version
, S_IRUGO
, show_abi_version
, NULL
);
636 static void ib_uverbs_add_one(struct ib_device
*device
)
638 struct ib_uverbs_device
*uverbs_dev
;
640 if (!device
->alloc_ucontext
)
643 uverbs_dev
= kmalloc(sizeof *uverbs_dev
, GFP_KERNEL
);
647 memset(uverbs_dev
, 0, sizeof *uverbs_dev
);
649 spin_lock(&map_lock
);
650 uverbs_dev
->devnum
= find_first_zero_bit(dev_map
, IB_UVERBS_MAX_DEVICES
);
651 if (uverbs_dev
->devnum
>= IB_UVERBS_MAX_DEVICES
) {
652 spin_unlock(&map_lock
);
655 set_bit(uverbs_dev
->devnum
, dev_map
);
656 spin_unlock(&map_lock
);
658 uverbs_dev
->ib_dev
= device
;
659 uverbs_dev
->num_comp_vectors
= 1;
662 cdev_init(&uverbs_dev
->dev
, &uverbs_mmap_fops
);
664 cdev_init(&uverbs_dev
->dev
, &uverbs_fops
);
665 uverbs_dev
->dev
.owner
= THIS_MODULE
;
666 kobject_set_name(&uverbs_dev
->dev
.kobj
, "uverbs%d", uverbs_dev
->devnum
);
667 if (cdev_add(&uverbs_dev
->dev
, IB_UVERBS_BASE_DEV
+ uverbs_dev
->devnum
, 1))
670 uverbs_dev
->class_dev
.class = &uverbs_class
;
671 uverbs_dev
->class_dev
.dev
= device
->dma_device
;
672 uverbs_dev
->class_dev
.devt
= uverbs_dev
->dev
.dev
;
673 snprintf(uverbs_dev
->class_dev
.class_id
, BUS_ID_SIZE
, "uverbs%d", uverbs_dev
->devnum
);
674 if (class_device_register(&uverbs_dev
->class_dev
))
677 if (class_device_create_file(&uverbs_dev
->class_dev
, &class_device_attr_ibdev
))
679 if (class_device_create_file(&uverbs_dev
->class_dev
, &class_device_attr_abi_version
))
682 ib_set_client_data(device
, &uverbs_client
, uverbs_dev
);
687 class_device_unregister(&uverbs_dev
->class_dev
);
690 cdev_del(&uverbs_dev
->dev
);
691 clear_bit(uverbs_dev
->devnum
, dev_map
);
698 static void ib_uverbs_remove_one(struct ib_device
*device
)
700 struct ib_uverbs_device
*uverbs_dev
= ib_get_client_data(device
, &uverbs_client
);
705 class_device_unregister(&uverbs_dev
->class_dev
);
708 static struct super_block
*uverbs_event_get_sb(struct file_system_type
*fs_type
, int flags
,
709 const char *dev_name
, void *data
)
711 return get_sb_pseudo(fs_type
, "infinibandevent:", NULL
,
712 INFINIBANDEVENTFS_MAGIC
);
715 static struct file_system_type uverbs_event_fs
= {
716 /* No owner field so module can be unloaded */
717 .name
= "infinibandeventfs",
718 .get_sb
= uverbs_event_get_sb
,
719 .kill_sb
= kill_litter_super
722 static int __init
ib_uverbs_init(void)
726 spin_lock_init(&map_lock
);
728 ret
= register_chrdev_region(IB_UVERBS_BASE_DEV
, IB_UVERBS_MAX_DEVICES
,
731 printk(KERN_ERR
"user_verbs: couldn't register device number\n");
735 ret
= class_register(&uverbs_class
);
737 printk(KERN_ERR
"user_verbs: couldn't create class infiniband_verbs\n");
741 ret
= class_create_file(&uverbs_class
, &class_attr_abi_version
);
743 printk(KERN_ERR
"user_verbs: couldn't create abi_version attribute\n");
747 ret
= register_filesystem(&uverbs_event_fs
);
749 printk(KERN_ERR
"user_verbs: couldn't register infinibandeventfs\n");
753 uverbs_event_mnt
= kern_mount(&uverbs_event_fs
);
754 if (IS_ERR(uverbs_event_mnt
)) {
755 ret
= PTR_ERR(uverbs_event_mnt
);
756 printk(KERN_ERR
"user_verbs: couldn't mount infinibandeventfs\n");
760 ret
= ib_register_client(&uverbs_client
);
762 printk(KERN_ERR
"user_verbs: couldn't register client\n");
769 mntput(uverbs_event_mnt
);
772 unregister_filesystem(&uverbs_event_fs
);
775 class_unregister(&uverbs_class
);
778 unregister_chrdev_region(IB_UVERBS_BASE_DEV
, IB_UVERBS_MAX_DEVICES
);
784 static void __exit
ib_uverbs_cleanup(void)
786 ib_unregister_client(&uverbs_client
);
787 mntput(uverbs_event_mnt
);
788 unregister_filesystem(&uverbs_event_fs
);
789 class_unregister(&uverbs_class
);
790 unregister_chrdev_region(IB_UVERBS_BASE_DEV
, IB_UVERBS_MAX_DEVICES
);
793 module_init(ib_uverbs_init
);
794 module_exit(ib_uverbs_cleanup
);