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RDMA/uverbs: Export ib_open_qp() capability to user space
[deliverable/linux.git] / drivers / infiniband / core / uverbs_cmd.c
1 /*
2 * Copyright (c) 2005 Topspin Communications. All rights reserved.
3 * Copyright (c) 2005, 2006, 2007 Cisco Systems. All rights reserved.
4 * Copyright (c) 2005 PathScale, Inc. All rights reserved.
5 * Copyright (c) 2006 Mellanox Technologies. All rights reserved.
6 *
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:
12 *
13 * Redistribution and use in source and binary forms, with or
14 * without modification, are permitted provided that the following
15 * conditions are met:
16 *
17 * - Redistributions of source code must retain the above
18 * copyright notice, this list of conditions and the following
19 * disclaimer.
20 *
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.
25 *
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
33 * SOFTWARE.
34 */
35
36 #include <linux/file.h>
37 #include <linux/fs.h>
38 #include <linux/slab.h>
39
40 #include <asm/uaccess.h>
41
42 #include "uverbs.h"
43
44 static struct lock_class_key pd_lock_key;
45 static struct lock_class_key mr_lock_key;
46 static struct lock_class_key cq_lock_key;
47 static struct lock_class_key qp_lock_key;
48 static struct lock_class_key ah_lock_key;
49 static struct lock_class_key srq_lock_key;
50 static struct lock_class_key xrcd_lock_key;
51
52 #define INIT_UDATA(udata, ibuf, obuf, ilen, olen) \
53 do { \
54 (udata)->inbuf = (void __user *) (ibuf); \
55 (udata)->outbuf = (void __user *) (obuf); \
56 (udata)->inlen = (ilen); \
57 (udata)->outlen = (olen); \
58 } while (0)
59
60 /*
61 * The ib_uobject locking scheme is as follows:
62 *
63 * - ib_uverbs_idr_lock protects the uverbs idrs themselves, so it
64 * needs to be held during all idr operations. When an object is
65 * looked up, a reference must be taken on the object's kref before
66 * dropping this lock.
67 *
68 * - Each object also has an rwsem. This rwsem must be held for
69 * reading while an operation that uses the object is performed.
70 * For example, while registering an MR, the associated PD's
71 * uobject.mutex must be held for reading. The rwsem must be held
72 * for writing while initializing or destroying an object.
73 *
74 * - In addition, each object has a "live" flag. If this flag is not
75 * set, then lookups of the object will fail even if it is found in
76 * the idr. This handles a reader that blocks and does not acquire
77 * the rwsem until after the object is destroyed. The destroy
78 * operation will set the live flag to 0 and then drop the rwsem;
79 * this will allow the reader to acquire the rwsem, see that the
80 * live flag is 0, and then drop the rwsem and its reference to
81 * object. The underlying storage will not be freed until the last
82 * reference to the object is dropped.
83 */
84
85 static void init_uobj(struct ib_uobject *uobj, u64 user_handle,
86 struct ib_ucontext *context, struct lock_class_key *key)
87 {
88 uobj->user_handle = user_handle;
89 uobj->context = context;
90 kref_init(&uobj->ref);
91 init_rwsem(&uobj->mutex);
92 lockdep_set_class(&uobj->mutex, key);
93 uobj->live = 0;
94 }
95
96 static void release_uobj(struct kref *kref)
97 {
98 kfree(container_of(kref, struct ib_uobject, ref));
99 }
100
101 static void put_uobj(struct ib_uobject *uobj)
102 {
103 kref_put(&uobj->ref, release_uobj);
104 }
105
106 static void put_uobj_read(struct ib_uobject *uobj)
107 {
108 up_read(&uobj->mutex);
109 put_uobj(uobj);
110 }
111
112 static void put_uobj_write(struct ib_uobject *uobj)
113 {
114 up_write(&uobj->mutex);
115 put_uobj(uobj);
116 }
117
118 static int idr_add_uobj(struct idr *idr, struct ib_uobject *uobj)
119 {
120 int ret;
121
122 retry:
123 if (!idr_pre_get(idr, GFP_KERNEL))
124 return -ENOMEM;
125
126 spin_lock(&ib_uverbs_idr_lock);
127 ret = idr_get_new(idr, uobj, &uobj->id);
128 spin_unlock(&ib_uverbs_idr_lock);
129
130 if (ret == -EAGAIN)
131 goto retry;
132
133 return ret;
134 }
135
136 void idr_remove_uobj(struct idr *idr, struct ib_uobject *uobj)
137 {
138 spin_lock(&ib_uverbs_idr_lock);
139 idr_remove(idr, uobj->id);
140 spin_unlock(&ib_uverbs_idr_lock);
141 }
142
143 static struct ib_uobject *__idr_get_uobj(struct idr *idr, int id,
144 struct ib_ucontext *context)
145 {
146 struct ib_uobject *uobj;
147
148 spin_lock(&ib_uverbs_idr_lock);
149 uobj = idr_find(idr, id);
150 if (uobj) {
151 if (uobj->context == context)
152 kref_get(&uobj->ref);
153 else
154 uobj = NULL;
155 }
156 spin_unlock(&ib_uverbs_idr_lock);
157
158 return uobj;
159 }
160
161 static struct ib_uobject *idr_read_uobj(struct idr *idr, int id,
162 struct ib_ucontext *context, int nested)
163 {
164 struct ib_uobject *uobj;
165
166 uobj = __idr_get_uobj(idr, id, context);
167 if (!uobj)
168 return NULL;
169
170 if (nested)
171 down_read_nested(&uobj->mutex, SINGLE_DEPTH_NESTING);
172 else
173 down_read(&uobj->mutex);
174 if (!uobj->live) {
175 put_uobj_read(uobj);
176 return NULL;
177 }
178
179 return uobj;
180 }
181
182 static struct ib_uobject *idr_write_uobj(struct idr *idr, int id,
183 struct ib_ucontext *context)
184 {
185 struct ib_uobject *uobj;
186
187 uobj = __idr_get_uobj(idr, id, context);
188 if (!uobj)
189 return NULL;
190
191 down_write(&uobj->mutex);
192 if (!uobj->live) {
193 put_uobj_write(uobj);
194 return NULL;
195 }
196
197 return uobj;
198 }
199
200 static void *idr_read_obj(struct idr *idr, int id, struct ib_ucontext *context,
201 int nested)
202 {
203 struct ib_uobject *uobj;
204
205 uobj = idr_read_uobj(idr, id, context, nested);
206 return uobj ? uobj->object : NULL;
207 }
208
209 static struct ib_pd *idr_read_pd(int pd_handle, struct ib_ucontext *context)
210 {
211 return idr_read_obj(&ib_uverbs_pd_idr, pd_handle, context, 0);
212 }
213
214 static void put_pd_read(struct ib_pd *pd)
215 {
216 put_uobj_read(pd->uobject);
217 }
218
219 static struct ib_cq *idr_read_cq(int cq_handle, struct ib_ucontext *context, int nested)
220 {
221 return idr_read_obj(&ib_uverbs_cq_idr, cq_handle, context, nested);
222 }
223
224 static void put_cq_read(struct ib_cq *cq)
225 {
226 put_uobj_read(cq->uobject);
227 }
228
229 static struct ib_ah *idr_read_ah(int ah_handle, struct ib_ucontext *context)
230 {
231 return idr_read_obj(&ib_uverbs_ah_idr, ah_handle, context, 0);
232 }
233
234 static void put_ah_read(struct ib_ah *ah)
235 {
236 put_uobj_read(ah->uobject);
237 }
238
239 static struct ib_qp *idr_read_qp(int qp_handle, struct ib_ucontext *context)
240 {
241 return idr_read_obj(&ib_uverbs_qp_idr, qp_handle, context, 0);
242 }
243
244 static void put_qp_read(struct ib_qp *qp)
245 {
246 put_uobj_read(qp->uobject);
247 }
248
249 static struct ib_srq *idr_read_srq(int srq_handle, struct ib_ucontext *context)
250 {
251 return idr_read_obj(&ib_uverbs_srq_idr, srq_handle, context, 0);
252 }
253
254 static void put_srq_read(struct ib_srq *srq)
255 {
256 put_uobj_read(srq->uobject);
257 }
258
259 static struct ib_xrcd *idr_read_xrcd(int xrcd_handle, struct ib_ucontext *context,
260 struct ib_uobject **uobj)
261 {
262 *uobj = idr_read_uobj(&ib_uverbs_xrcd_idr, xrcd_handle, context, 0);
263 return *uobj ? (*uobj)->object : NULL;
264 }
265
266 static void put_xrcd_read(struct ib_uobject *uobj)
267 {
268 put_uobj_read(uobj);
269 }
270
271 ssize_t ib_uverbs_get_context(struct ib_uverbs_file *file,
272 const char __user *buf,
273 int in_len, int out_len)
274 {
275 struct ib_uverbs_get_context cmd;
276 struct ib_uverbs_get_context_resp resp;
277 struct ib_udata udata;
278 struct ib_device *ibdev = file->device->ib_dev;
279 struct ib_ucontext *ucontext;
280 struct file *filp;
281 int ret;
282
283 if (out_len < sizeof resp)
284 return -ENOSPC;
285
286 if (copy_from_user(&cmd, buf, sizeof cmd))
287 return -EFAULT;
288
289 mutex_lock(&file->mutex);
290
291 if (file->ucontext) {
292 ret = -EINVAL;
293 goto err;
294 }
295
296 INIT_UDATA(&udata, buf + sizeof cmd,
297 (unsigned long) cmd.response + sizeof resp,
298 in_len - sizeof cmd, out_len - sizeof resp);
299
300 ucontext = ibdev->alloc_ucontext(ibdev, &udata);
301 if (IS_ERR(ucontext)) {
302 ret = PTR_ERR(ucontext);
303 goto err;
304 }
305
306 ucontext->device = ibdev;
307 INIT_LIST_HEAD(&ucontext->pd_list);
308 INIT_LIST_HEAD(&ucontext->mr_list);
309 INIT_LIST_HEAD(&ucontext->mw_list);
310 INIT_LIST_HEAD(&ucontext->cq_list);
311 INIT_LIST_HEAD(&ucontext->qp_list);
312 INIT_LIST_HEAD(&ucontext->srq_list);
313 INIT_LIST_HEAD(&ucontext->ah_list);
314 INIT_LIST_HEAD(&ucontext->xrcd_list);
315 ucontext->closing = 0;
316
317 resp.num_comp_vectors = file->device->num_comp_vectors;
318
319 ret = get_unused_fd();
320 if (ret < 0)
321 goto err_free;
322 resp.async_fd = ret;
323
324 filp = ib_uverbs_alloc_event_file(file, 1);
325 if (IS_ERR(filp)) {
326 ret = PTR_ERR(filp);
327 goto err_fd;
328 }
329
330 if (copy_to_user((void __user *) (unsigned long) cmd.response,
331 &resp, sizeof resp)) {
332 ret = -EFAULT;
333 goto err_file;
334 }
335
336 file->async_file = filp->private_data;
337
338 INIT_IB_EVENT_HANDLER(&file->event_handler, file->device->ib_dev,
339 ib_uverbs_event_handler);
340 ret = ib_register_event_handler(&file->event_handler);
341 if (ret)
342 goto err_file;
343
344 kref_get(&file->async_file->ref);
345 kref_get(&file->ref);
346 file->ucontext = ucontext;
347
348 fd_install(resp.async_fd, filp);
349
350 mutex_unlock(&file->mutex);
351
352 return in_len;
353
354 err_file:
355 fput(filp);
356
357 err_fd:
358 put_unused_fd(resp.async_fd);
359
360 err_free:
361 ibdev->dealloc_ucontext(ucontext);
362
363 err:
364 mutex_unlock(&file->mutex);
365 return ret;
366 }
367
368 ssize_t ib_uverbs_query_device(struct ib_uverbs_file *file,
369 const char __user *buf,
370 int in_len, int out_len)
371 {
372 struct ib_uverbs_query_device cmd;
373 struct ib_uverbs_query_device_resp resp;
374 struct ib_device_attr attr;
375 int ret;
376
377 if (out_len < sizeof resp)
378 return -ENOSPC;
379
380 if (copy_from_user(&cmd, buf, sizeof cmd))
381 return -EFAULT;
382
383 ret = ib_query_device(file->device->ib_dev, &attr);
384 if (ret)
385 return ret;
386
387 memset(&resp, 0, sizeof resp);
388
389 resp.fw_ver = attr.fw_ver;
390 resp.node_guid = file->device->ib_dev->node_guid;
391 resp.sys_image_guid = attr.sys_image_guid;
392 resp.max_mr_size = attr.max_mr_size;
393 resp.page_size_cap = attr.page_size_cap;
394 resp.vendor_id = attr.vendor_id;
395 resp.vendor_part_id = attr.vendor_part_id;
396 resp.hw_ver = attr.hw_ver;
397 resp.max_qp = attr.max_qp;
398 resp.max_qp_wr = attr.max_qp_wr;
399 resp.device_cap_flags = attr.device_cap_flags;
400 resp.max_sge = attr.max_sge;
401 resp.max_sge_rd = attr.max_sge_rd;
402 resp.max_cq = attr.max_cq;
403 resp.max_cqe = attr.max_cqe;
404 resp.max_mr = attr.max_mr;
405 resp.max_pd = attr.max_pd;
406 resp.max_qp_rd_atom = attr.max_qp_rd_atom;
407 resp.max_ee_rd_atom = attr.max_ee_rd_atom;
408 resp.max_res_rd_atom = attr.max_res_rd_atom;
409 resp.max_qp_init_rd_atom = attr.max_qp_init_rd_atom;
410 resp.max_ee_init_rd_atom = attr.max_ee_init_rd_atom;
411 resp.atomic_cap = attr.atomic_cap;
412 resp.max_ee = attr.max_ee;
413 resp.max_rdd = attr.max_rdd;
414 resp.max_mw = attr.max_mw;
415 resp.max_raw_ipv6_qp = attr.max_raw_ipv6_qp;
416 resp.max_raw_ethy_qp = attr.max_raw_ethy_qp;
417 resp.max_mcast_grp = attr.max_mcast_grp;
418 resp.max_mcast_qp_attach = attr.max_mcast_qp_attach;
419 resp.max_total_mcast_qp_attach = attr.max_total_mcast_qp_attach;
420 resp.max_ah = attr.max_ah;
421 resp.max_fmr = attr.max_fmr;
422 resp.max_map_per_fmr = attr.max_map_per_fmr;
423 resp.max_srq = attr.max_srq;
424 resp.max_srq_wr = attr.max_srq_wr;
425 resp.max_srq_sge = attr.max_srq_sge;
426 resp.max_pkeys = attr.max_pkeys;
427 resp.local_ca_ack_delay = attr.local_ca_ack_delay;
428 resp.phys_port_cnt = file->device->ib_dev->phys_port_cnt;
429
430 if (copy_to_user((void __user *) (unsigned long) cmd.response,
431 &resp, sizeof resp))
432 return -EFAULT;
433
434 return in_len;
435 }
436
437 ssize_t ib_uverbs_query_port(struct ib_uverbs_file *file,
438 const char __user *buf,
439 int in_len, int out_len)
440 {
441 struct ib_uverbs_query_port cmd;
442 struct ib_uverbs_query_port_resp resp;
443 struct ib_port_attr attr;
444 int ret;
445
446 if (out_len < sizeof resp)
447 return -ENOSPC;
448
449 if (copy_from_user(&cmd, buf, sizeof cmd))
450 return -EFAULT;
451
452 ret = ib_query_port(file->device->ib_dev, cmd.port_num, &attr);
453 if (ret)
454 return ret;
455
456 memset(&resp, 0, sizeof resp);
457
458 resp.state = attr.state;
459 resp.max_mtu = attr.max_mtu;
460 resp.active_mtu = attr.active_mtu;
461 resp.gid_tbl_len = attr.gid_tbl_len;
462 resp.port_cap_flags = attr.port_cap_flags;
463 resp.max_msg_sz = attr.max_msg_sz;
464 resp.bad_pkey_cntr = attr.bad_pkey_cntr;
465 resp.qkey_viol_cntr = attr.qkey_viol_cntr;
466 resp.pkey_tbl_len = attr.pkey_tbl_len;
467 resp.lid = attr.lid;
468 resp.sm_lid = attr.sm_lid;
469 resp.lmc = attr.lmc;
470 resp.max_vl_num = attr.max_vl_num;
471 resp.sm_sl = attr.sm_sl;
472 resp.subnet_timeout = attr.subnet_timeout;
473 resp.init_type_reply = attr.init_type_reply;
474 resp.active_width = attr.active_width;
475 resp.active_speed = attr.active_speed;
476 resp.phys_state = attr.phys_state;
477 resp.link_layer = rdma_port_get_link_layer(file->device->ib_dev,
478 cmd.port_num);
479
480 if (copy_to_user((void __user *) (unsigned long) cmd.response,
481 &resp, sizeof resp))
482 return -EFAULT;
483
484 return in_len;
485 }
486
487 ssize_t ib_uverbs_alloc_pd(struct ib_uverbs_file *file,
488 const char __user *buf,
489 int in_len, int out_len)
490 {
491 struct ib_uverbs_alloc_pd cmd;
492 struct ib_uverbs_alloc_pd_resp resp;
493 struct ib_udata udata;
494 struct ib_uobject *uobj;
495 struct ib_pd *pd;
496 int ret;
497
498 if (out_len < sizeof resp)
499 return -ENOSPC;
500
501 if (copy_from_user(&cmd, buf, sizeof cmd))
502 return -EFAULT;
503
504 INIT_UDATA(&udata, buf + sizeof cmd,
505 (unsigned long) cmd.response + sizeof resp,
506 in_len - sizeof cmd, out_len - sizeof resp);
507
508 uobj = kmalloc(sizeof *uobj, GFP_KERNEL);
509 if (!uobj)
510 return -ENOMEM;
511
512 init_uobj(uobj, 0, file->ucontext, &pd_lock_key);
513 down_write(&uobj->mutex);
514
515 pd = file->device->ib_dev->alloc_pd(file->device->ib_dev,
516 file->ucontext, &udata);
517 if (IS_ERR(pd)) {
518 ret = PTR_ERR(pd);
519 goto err;
520 }
521
522 pd->device = file->device->ib_dev;
523 pd->uobject = uobj;
524 atomic_set(&pd->usecnt, 0);
525
526 uobj->object = pd;
527 ret = idr_add_uobj(&ib_uverbs_pd_idr, uobj);
528 if (ret)
529 goto err_idr;
530
531 memset(&resp, 0, sizeof resp);
532 resp.pd_handle = uobj->id;
533
534 if (copy_to_user((void __user *) (unsigned long) cmd.response,
535 &resp, sizeof resp)) {
536 ret = -EFAULT;
537 goto err_copy;
538 }
539
540 mutex_lock(&file->mutex);
541 list_add_tail(&uobj->list, &file->ucontext->pd_list);
542 mutex_unlock(&file->mutex);
543
544 uobj->live = 1;
545
546 up_write(&uobj->mutex);
547
548 return in_len;
549
550 err_copy:
551 idr_remove_uobj(&ib_uverbs_pd_idr, uobj);
552
553 err_idr:
554 ib_dealloc_pd(pd);
555
556 err:
557 put_uobj_write(uobj);
558 return ret;
559 }
560
561 ssize_t ib_uverbs_dealloc_pd(struct ib_uverbs_file *file,
562 const char __user *buf,
563 int in_len, int out_len)
564 {
565 struct ib_uverbs_dealloc_pd cmd;
566 struct ib_uobject *uobj;
567 int ret;
568
569 if (copy_from_user(&cmd, buf, sizeof cmd))
570 return -EFAULT;
571
572 uobj = idr_write_uobj(&ib_uverbs_pd_idr, cmd.pd_handle, file->ucontext);
573 if (!uobj)
574 return -EINVAL;
575
576 ret = ib_dealloc_pd(uobj->object);
577 if (!ret)
578 uobj->live = 0;
579
580 put_uobj_write(uobj);
581
582 if (ret)
583 return ret;
584
585 idr_remove_uobj(&ib_uverbs_pd_idr, uobj);
586
587 mutex_lock(&file->mutex);
588 list_del(&uobj->list);
589 mutex_unlock(&file->mutex);
590
591 put_uobj(uobj);
592
593 return in_len;
594 }
595
596 struct xrcd_table_entry {
597 struct rb_node node;
598 struct ib_xrcd *xrcd;
599 struct inode *inode;
600 };
601
602 static int xrcd_table_insert(struct ib_uverbs_device *dev,
603 struct inode *inode,
604 struct ib_xrcd *xrcd)
605 {
606 struct xrcd_table_entry *entry, *scan;
607 struct rb_node **p = &dev->xrcd_tree.rb_node;
608 struct rb_node *parent = NULL;
609
610 entry = kmalloc(sizeof *entry, GFP_KERNEL);
611 if (!entry)
612 return -ENOMEM;
613
614 entry->xrcd = xrcd;
615 entry->inode = inode;
616
617 while (*p) {
618 parent = *p;
619 scan = rb_entry(parent, struct xrcd_table_entry, node);
620
621 if (inode < scan->inode) {
622 p = &(*p)->rb_left;
623 } else if (inode > scan->inode) {
624 p = &(*p)->rb_right;
625 } else {
626 kfree(entry);
627 return -EEXIST;
628 }
629 }
630
631 rb_link_node(&entry->node, parent, p);
632 rb_insert_color(&entry->node, &dev->xrcd_tree);
633 igrab(inode);
634 return 0;
635 }
636
637 static struct xrcd_table_entry *xrcd_table_search(struct ib_uverbs_device *dev,
638 struct inode *inode)
639 {
640 struct xrcd_table_entry *entry;
641 struct rb_node *p = dev->xrcd_tree.rb_node;
642
643 while (p) {
644 entry = rb_entry(p, struct xrcd_table_entry, node);
645
646 if (inode < entry->inode)
647 p = p->rb_left;
648 else if (inode > entry->inode)
649 p = p->rb_right;
650 else
651 return entry;
652 }
653
654 return NULL;
655 }
656
657 static struct ib_xrcd *find_xrcd(struct ib_uverbs_device *dev, struct inode *inode)
658 {
659 struct xrcd_table_entry *entry;
660
661 entry = xrcd_table_search(dev, inode);
662 if (!entry)
663 return NULL;
664
665 return entry->xrcd;
666 }
667
668 static void xrcd_table_delete(struct ib_uverbs_device *dev,
669 struct inode *inode)
670 {
671 struct xrcd_table_entry *entry;
672
673 entry = xrcd_table_search(dev, inode);
674 if (entry) {
675 iput(inode);
676 rb_erase(&entry->node, &dev->xrcd_tree);
677 kfree(entry);
678 }
679 }
680
681 ssize_t ib_uverbs_open_xrcd(struct ib_uverbs_file *file,
682 const char __user *buf, int in_len,
683 int out_len)
684 {
685 struct ib_uverbs_open_xrcd cmd;
686 struct ib_uverbs_open_xrcd_resp resp;
687 struct ib_udata udata;
688 struct ib_uxrcd_object *obj;
689 struct ib_xrcd *xrcd = NULL;
690 struct file *f = NULL;
691 struct inode *inode = NULL;
692 int ret = 0;
693 int new_xrcd = 0;
694
695 if (out_len < sizeof resp)
696 return -ENOSPC;
697
698 if (copy_from_user(&cmd, buf, sizeof cmd))
699 return -EFAULT;
700
701 INIT_UDATA(&udata, buf + sizeof cmd,
702 (unsigned long) cmd.response + sizeof resp,
703 in_len - sizeof cmd, out_len - sizeof resp);
704
705 mutex_lock(&file->device->xrcd_tree_mutex);
706
707 if (cmd.fd != -1) {
708 /* search for file descriptor */
709 f = fget(cmd.fd);
710 if (!f) {
711 ret = -EBADF;
712 goto err_tree_mutex_unlock;
713 }
714
715 inode = f->f_dentry->d_inode;
716 if (!inode) {
717 ret = -EBADF;
718 goto err_tree_mutex_unlock;
719 }
720
721 xrcd = find_xrcd(file->device, inode);
722 if (!xrcd && !(cmd.oflags & O_CREAT)) {
723 /* no file descriptor. Need CREATE flag */
724 ret = -EAGAIN;
725 goto err_tree_mutex_unlock;
726 }
727
728 if (xrcd && cmd.oflags & O_EXCL) {
729 ret = -EINVAL;
730 goto err_tree_mutex_unlock;
731 }
732 }
733
734 obj = kmalloc(sizeof *obj, GFP_KERNEL);
735 if (!obj) {
736 ret = -ENOMEM;
737 goto err_tree_mutex_unlock;
738 }
739
740 init_uobj(&obj->uobject, 0, file->ucontext, &xrcd_lock_key);
741
742 down_write(&obj->uobject.mutex);
743
744 if (!xrcd) {
745 xrcd = file->device->ib_dev->alloc_xrcd(file->device->ib_dev,
746 file->ucontext, &udata);
747 if (IS_ERR(xrcd)) {
748 ret = PTR_ERR(xrcd);
749 goto err;
750 }
751
752 xrcd->inode = inode;
753 xrcd->device = file->device->ib_dev;
754 atomic_set(&xrcd->usecnt, 0);
755 mutex_init(&xrcd->tgt_qp_mutex);
756 INIT_LIST_HEAD(&xrcd->tgt_qp_list);
757 new_xrcd = 1;
758 }
759
760 atomic_set(&obj->refcnt, 0);
761 obj->uobject.object = xrcd;
762 ret = idr_add_uobj(&ib_uverbs_xrcd_idr, &obj->uobject);
763 if (ret)
764 goto err_idr;
765
766 memset(&resp, 0, sizeof resp);
767 resp.xrcd_handle = obj->uobject.id;
768
769 if (inode) {
770 if (new_xrcd) {
771 /* create new inode/xrcd table entry */
772 ret = xrcd_table_insert(file->device, inode, xrcd);
773 if (ret)
774 goto err_insert_xrcd;
775 }
776 atomic_inc(&xrcd->usecnt);
777 }
778
779 if (copy_to_user((void __user *) (unsigned long) cmd.response,
780 &resp, sizeof resp)) {
781 ret = -EFAULT;
782 goto err_copy;
783 }
784
785 if (f)
786 fput(f);
787
788 mutex_lock(&file->mutex);
789 list_add_tail(&obj->uobject.list, &file->ucontext->xrcd_list);
790 mutex_unlock(&file->mutex);
791
792 obj->uobject.live = 1;
793 up_write(&obj->uobject.mutex);
794
795 mutex_unlock(&file->device->xrcd_tree_mutex);
796 return in_len;
797
798 err_copy:
799 if (inode) {
800 if (new_xrcd)
801 xrcd_table_delete(file->device, inode);
802 atomic_dec(&xrcd->usecnt);
803 }
804
805 err_insert_xrcd:
806 idr_remove_uobj(&ib_uverbs_xrcd_idr, &obj->uobject);
807
808 err_idr:
809 ib_dealloc_xrcd(xrcd);
810
811 err:
812 put_uobj_write(&obj->uobject);
813
814 err_tree_mutex_unlock:
815 if (f)
816 fput(f);
817
818 mutex_unlock(&file->device->xrcd_tree_mutex);
819
820 return ret;
821 }
822
823 ssize_t ib_uverbs_close_xrcd(struct ib_uverbs_file *file,
824 const char __user *buf, int in_len,
825 int out_len)
826 {
827 struct ib_uverbs_close_xrcd cmd;
828 struct ib_uobject *uobj;
829 struct ib_xrcd *xrcd = NULL;
830 struct inode *inode = NULL;
831 struct ib_uxrcd_object *obj;
832 int live;
833 int ret = 0;
834
835 if (copy_from_user(&cmd, buf, sizeof cmd))
836 return -EFAULT;
837
838 mutex_lock(&file->device->xrcd_tree_mutex);
839 uobj = idr_write_uobj(&ib_uverbs_xrcd_idr, cmd.xrcd_handle, file->ucontext);
840 if (!uobj) {
841 ret = -EINVAL;
842 goto out;
843 }
844
845 xrcd = uobj->object;
846 inode = xrcd->inode;
847 obj = container_of(uobj, struct ib_uxrcd_object, uobject);
848 if (atomic_read(&obj->refcnt)) {
849 put_uobj_write(uobj);
850 ret = -EBUSY;
851 goto out;
852 }
853
854 if (!inode || atomic_dec_and_test(&xrcd->usecnt)) {
855 ret = ib_dealloc_xrcd(uobj->object);
856 if (!ret)
857 uobj->live = 0;
858 }
859
860 live = uobj->live;
861 if (inode && ret)
862 atomic_inc(&xrcd->usecnt);
863
864 put_uobj_write(uobj);
865
866 if (ret)
867 goto out;
868
869 if (inode && !live)
870 xrcd_table_delete(file->device, inode);
871
872 idr_remove_uobj(&ib_uverbs_xrcd_idr, uobj);
873 mutex_lock(&file->mutex);
874 list_del(&uobj->list);
875 mutex_unlock(&file->mutex);
876
877 put_uobj(uobj);
878 ret = in_len;
879
880 out:
881 mutex_unlock(&file->device->xrcd_tree_mutex);
882 return ret;
883 }
884
885 void ib_uverbs_dealloc_xrcd(struct ib_uverbs_device *dev,
886 struct ib_xrcd *xrcd)
887 {
888 struct inode *inode;
889
890 inode = xrcd->inode;
891 if (inode && !atomic_dec_and_test(&xrcd->usecnt))
892 return;
893
894 ib_dealloc_xrcd(xrcd);
895
896 if (inode)
897 xrcd_table_delete(dev, inode);
898 }
899
900 ssize_t ib_uverbs_reg_mr(struct ib_uverbs_file *file,
901 const char __user *buf, int in_len,
902 int out_len)
903 {
904 struct ib_uverbs_reg_mr cmd;
905 struct ib_uverbs_reg_mr_resp resp;
906 struct ib_udata udata;
907 struct ib_uobject *uobj;
908 struct ib_pd *pd;
909 struct ib_mr *mr;
910 int ret;
911
912 if (out_len < sizeof resp)
913 return -ENOSPC;
914
915 if (copy_from_user(&cmd, buf, sizeof cmd))
916 return -EFAULT;
917
918 INIT_UDATA(&udata, buf + sizeof cmd,
919 (unsigned long) cmd.response + sizeof resp,
920 in_len - sizeof cmd, out_len - sizeof resp);
921
922 if ((cmd.start & ~PAGE_MASK) != (cmd.hca_va & ~PAGE_MASK))
923 return -EINVAL;
924
925 /*
926 * Local write permission is required if remote write or
927 * remote atomic permission is also requested.
928 */
929 if (cmd.access_flags & (IB_ACCESS_REMOTE_ATOMIC | IB_ACCESS_REMOTE_WRITE) &&
930 !(cmd.access_flags & IB_ACCESS_LOCAL_WRITE))
931 return -EINVAL;
932
933 uobj = kmalloc(sizeof *uobj, GFP_KERNEL);
934 if (!uobj)
935 return -ENOMEM;
936
937 init_uobj(uobj, 0, file->ucontext, &mr_lock_key);
938 down_write(&uobj->mutex);
939
940 pd = idr_read_pd(cmd.pd_handle, file->ucontext);
941 if (!pd) {
942 ret = -EINVAL;
943 goto err_free;
944 }
945
946 mr = pd->device->reg_user_mr(pd, cmd.start, cmd.length, cmd.hca_va,
947 cmd.access_flags, &udata);
948 if (IS_ERR(mr)) {
949 ret = PTR_ERR(mr);
950 goto err_put;
951 }
952
953 mr->device = pd->device;
954 mr->pd = pd;
955 mr->uobject = uobj;
956 atomic_inc(&pd->usecnt);
957 atomic_set(&mr->usecnt, 0);
958
959 uobj->object = mr;
960 ret = idr_add_uobj(&ib_uverbs_mr_idr, uobj);
961 if (ret)
962 goto err_unreg;
963
964 memset(&resp, 0, sizeof resp);
965 resp.lkey = mr->lkey;
966 resp.rkey = mr->rkey;
967 resp.mr_handle = uobj->id;
968
969 if (copy_to_user((void __user *) (unsigned long) cmd.response,
970 &resp, sizeof resp)) {
971 ret = -EFAULT;
972 goto err_copy;
973 }
974
975 put_pd_read(pd);
976
977 mutex_lock(&file->mutex);
978 list_add_tail(&uobj->list, &file->ucontext->mr_list);
979 mutex_unlock(&file->mutex);
980
981 uobj->live = 1;
982
983 up_write(&uobj->mutex);
984
985 return in_len;
986
987 err_copy:
988 idr_remove_uobj(&ib_uverbs_mr_idr, uobj);
989
990 err_unreg:
991 ib_dereg_mr(mr);
992
993 err_put:
994 put_pd_read(pd);
995
996 err_free:
997 put_uobj_write(uobj);
998 return ret;
999 }
1000
1001 ssize_t ib_uverbs_dereg_mr(struct ib_uverbs_file *file,
1002 const char __user *buf, int in_len,
1003 int out_len)
1004 {
1005 struct ib_uverbs_dereg_mr cmd;
1006 struct ib_mr *mr;
1007 struct ib_uobject *uobj;
1008 int ret = -EINVAL;
1009
1010 if (copy_from_user(&cmd, buf, sizeof cmd))
1011 return -EFAULT;
1012
1013 uobj = idr_write_uobj(&ib_uverbs_mr_idr, cmd.mr_handle, file->ucontext);
1014 if (!uobj)
1015 return -EINVAL;
1016
1017 mr = uobj->object;
1018
1019 ret = ib_dereg_mr(mr);
1020 if (!ret)
1021 uobj->live = 0;
1022
1023 put_uobj_write(uobj);
1024
1025 if (ret)
1026 return ret;
1027
1028 idr_remove_uobj(&ib_uverbs_mr_idr, uobj);
1029
1030 mutex_lock(&file->mutex);
1031 list_del(&uobj->list);
1032 mutex_unlock(&file->mutex);
1033
1034 put_uobj(uobj);
1035
1036 return in_len;
1037 }
1038
1039 ssize_t ib_uverbs_create_comp_channel(struct ib_uverbs_file *file,
1040 const char __user *buf, int in_len,
1041 int out_len)
1042 {
1043 struct ib_uverbs_create_comp_channel cmd;
1044 struct ib_uverbs_create_comp_channel_resp resp;
1045 struct file *filp;
1046 int ret;
1047
1048 if (out_len < sizeof resp)
1049 return -ENOSPC;
1050
1051 if (copy_from_user(&cmd, buf, sizeof cmd))
1052 return -EFAULT;
1053
1054 ret = get_unused_fd();
1055 if (ret < 0)
1056 return ret;
1057 resp.fd = ret;
1058
1059 filp = ib_uverbs_alloc_event_file(file, 0);
1060 if (IS_ERR(filp)) {
1061 put_unused_fd(resp.fd);
1062 return PTR_ERR(filp);
1063 }
1064
1065 if (copy_to_user((void __user *) (unsigned long) cmd.response,
1066 &resp, sizeof resp)) {
1067 put_unused_fd(resp.fd);
1068 fput(filp);
1069 return -EFAULT;
1070 }
1071
1072 fd_install(resp.fd, filp);
1073 return in_len;
1074 }
1075
1076 ssize_t ib_uverbs_create_cq(struct ib_uverbs_file *file,
1077 const char __user *buf, int in_len,
1078 int out_len)
1079 {
1080 struct ib_uverbs_create_cq cmd;
1081 struct ib_uverbs_create_cq_resp resp;
1082 struct ib_udata udata;
1083 struct ib_ucq_object *obj;
1084 struct ib_uverbs_event_file *ev_file = NULL;
1085 struct ib_cq *cq;
1086 int ret;
1087
1088 if (out_len < sizeof resp)
1089 return -ENOSPC;
1090
1091 if (copy_from_user(&cmd, buf, sizeof cmd))
1092 return -EFAULT;
1093
1094 INIT_UDATA(&udata, buf + sizeof cmd,
1095 (unsigned long) cmd.response + sizeof resp,
1096 in_len - sizeof cmd, out_len - sizeof resp);
1097
1098 if (cmd.comp_vector >= file->device->num_comp_vectors)
1099 return -EINVAL;
1100
1101 obj = kmalloc(sizeof *obj, GFP_KERNEL);
1102 if (!obj)
1103 return -ENOMEM;
1104
1105 init_uobj(&obj->uobject, cmd.user_handle, file->ucontext, &cq_lock_key);
1106 down_write(&obj->uobject.mutex);
1107
1108 if (cmd.comp_channel >= 0) {
1109 ev_file = ib_uverbs_lookup_comp_file(cmd.comp_channel);
1110 if (!ev_file) {
1111 ret = -EINVAL;
1112 goto err;
1113 }
1114 }
1115
1116 obj->uverbs_file = file;
1117 obj->comp_events_reported = 0;
1118 obj->async_events_reported = 0;
1119 INIT_LIST_HEAD(&obj->comp_list);
1120 INIT_LIST_HEAD(&obj->async_list);
1121
1122 cq = file->device->ib_dev->create_cq(file->device->ib_dev, cmd.cqe,
1123 cmd.comp_vector,
1124 file->ucontext, &udata);
1125 if (IS_ERR(cq)) {
1126 ret = PTR_ERR(cq);
1127 goto err_file;
1128 }
1129
1130 cq->device = file->device->ib_dev;
1131 cq->uobject = &obj->uobject;
1132 cq->comp_handler = ib_uverbs_comp_handler;
1133 cq->event_handler = ib_uverbs_cq_event_handler;
1134 cq->cq_context = ev_file;
1135 atomic_set(&cq->usecnt, 0);
1136
1137 obj->uobject.object = cq;
1138 ret = idr_add_uobj(&ib_uverbs_cq_idr, &obj->uobject);
1139 if (ret)
1140 goto err_free;
1141
1142 memset(&resp, 0, sizeof resp);
1143 resp.cq_handle = obj->uobject.id;
1144 resp.cqe = cq->cqe;
1145
1146 if (copy_to_user((void __user *) (unsigned long) cmd.response,
1147 &resp, sizeof resp)) {
1148 ret = -EFAULT;
1149 goto err_copy;
1150 }
1151
1152 mutex_lock(&file->mutex);
1153 list_add_tail(&obj->uobject.list, &file->ucontext->cq_list);
1154 mutex_unlock(&file->mutex);
1155
1156 obj->uobject.live = 1;
1157
1158 up_write(&obj->uobject.mutex);
1159
1160 return in_len;
1161
1162 err_copy:
1163 idr_remove_uobj(&ib_uverbs_cq_idr, &obj->uobject);
1164
1165 err_free:
1166 ib_destroy_cq(cq);
1167
1168 err_file:
1169 if (ev_file)
1170 ib_uverbs_release_ucq(file, ev_file, obj);
1171
1172 err:
1173 put_uobj_write(&obj->uobject);
1174 return ret;
1175 }
1176
1177 ssize_t ib_uverbs_resize_cq(struct ib_uverbs_file *file,
1178 const char __user *buf, int in_len,
1179 int out_len)
1180 {
1181 struct ib_uverbs_resize_cq cmd;
1182 struct ib_uverbs_resize_cq_resp resp;
1183 struct ib_udata udata;
1184 struct ib_cq *cq;
1185 int ret = -EINVAL;
1186
1187 if (copy_from_user(&cmd, buf, sizeof cmd))
1188 return -EFAULT;
1189
1190 INIT_UDATA(&udata, buf + sizeof cmd,
1191 (unsigned long) cmd.response + sizeof resp,
1192 in_len - sizeof cmd, out_len - sizeof resp);
1193
1194 cq = idr_read_cq(cmd.cq_handle, file->ucontext, 0);
1195 if (!cq)
1196 return -EINVAL;
1197
1198 ret = cq->device->resize_cq(cq, cmd.cqe, &udata);
1199 if (ret)
1200 goto out;
1201
1202 resp.cqe = cq->cqe;
1203
1204 if (copy_to_user((void __user *) (unsigned long) cmd.response,
1205 &resp, sizeof resp.cqe))
1206 ret = -EFAULT;
1207
1208 out:
1209 put_cq_read(cq);
1210
1211 return ret ? ret : in_len;
1212 }
1213
1214 static int copy_wc_to_user(void __user *dest, struct ib_wc *wc)
1215 {
1216 struct ib_uverbs_wc tmp;
1217
1218 tmp.wr_id = wc->wr_id;
1219 tmp.status = wc->status;
1220 tmp.opcode = wc->opcode;
1221 tmp.vendor_err = wc->vendor_err;
1222 tmp.byte_len = wc->byte_len;
1223 tmp.ex.imm_data = (__u32 __force) wc->ex.imm_data;
1224 tmp.qp_num = wc->qp->qp_num;
1225 tmp.src_qp = wc->src_qp;
1226 tmp.wc_flags = wc->wc_flags;
1227 tmp.pkey_index = wc->pkey_index;
1228 tmp.slid = wc->slid;
1229 tmp.sl = wc->sl;
1230 tmp.dlid_path_bits = wc->dlid_path_bits;
1231 tmp.port_num = wc->port_num;
1232 tmp.reserved = 0;
1233
1234 if (copy_to_user(dest, &tmp, sizeof tmp))
1235 return -EFAULT;
1236
1237 return 0;
1238 }
1239
1240 ssize_t ib_uverbs_poll_cq(struct ib_uverbs_file *file,
1241 const char __user *buf, int in_len,
1242 int out_len)
1243 {
1244 struct ib_uverbs_poll_cq cmd;
1245 struct ib_uverbs_poll_cq_resp resp;
1246 u8 __user *header_ptr;
1247 u8 __user *data_ptr;
1248 struct ib_cq *cq;
1249 struct ib_wc wc;
1250 int ret;
1251
1252 if (copy_from_user(&cmd, buf, sizeof cmd))
1253 return -EFAULT;
1254
1255 cq = idr_read_cq(cmd.cq_handle, file->ucontext, 0);
1256 if (!cq)
1257 return -EINVAL;
1258
1259 /* we copy a struct ib_uverbs_poll_cq_resp to user space */
1260 header_ptr = (void __user *)(unsigned long) cmd.response;
1261 data_ptr = header_ptr + sizeof resp;
1262
1263 memset(&resp, 0, sizeof resp);
1264 while (resp.count < cmd.ne) {
1265 ret = ib_poll_cq(cq, 1, &wc);
1266 if (ret < 0)
1267 goto out_put;
1268 if (!ret)
1269 break;
1270
1271 ret = copy_wc_to_user(data_ptr, &wc);
1272 if (ret)
1273 goto out_put;
1274
1275 data_ptr += sizeof(struct ib_uverbs_wc);
1276 ++resp.count;
1277 }
1278
1279 if (copy_to_user(header_ptr, &resp, sizeof resp)) {
1280 ret = -EFAULT;
1281 goto out_put;
1282 }
1283
1284 ret = in_len;
1285
1286 out_put:
1287 put_cq_read(cq);
1288 return ret;
1289 }
1290
1291 ssize_t ib_uverbs_req_notify_cq(struct ib_uverbs_file *file,
1292 const char __user *buf, int in_len,
1293 int out_len)
1294 {
1295 struct ib_uverbs_req_notify_cq cmd;
1296 struct ib_cq *cq;
1297
1298 if (copy_from_user(&cmd, buf, sizeof cmd))
1299 return -EFAULT;
1300
1301 cq = idr_read_cq(cmd.cq_handle, file->ucontext, 0);
1302 if (!cq)
1303 return -EINVAL;
1304
1305 ib_req_notify_cq(cq, cmd.solicited_only ?
1306 IB_CQ_SOLICITED : IB_CQ_NEXT_COMP);
1307
1308 put_cq_read(cq);
1309
1310 return in_len;
1311 }
1312
1313 ssize_t ib_uverbs_destroy_cq(struct ib_uverbs_file *file,
1314 const char __user *buf, int in_len,
1315 int out_len)
1316 {
1317 struct ib_uverbs_destroy_cq cmd;
1318 struct ib_uverbs_destroy_cq_resp resp;
1319 struct ib_uobject *uobj;
1320 struct ib_cq *cq;
1321 struct ib_ucq_object *obj;
1322 struct ib_uverbs_event_file *ev_file;
1323 int ret = -EINVAL;
1324
1325 if (copy_from_user(&cmd, buf, sizeof cmd))
1326 return -EFAULT;
1327
1328 uobj = idr_write_uobj(&ib_uverbs_cq_idr, cmd.cq_handle, file->ucontext);
1329 if (!uobj)
1330 return -EINVAL;
1331 cq = uobj->object;
1332 ev_file = cq->cq_context;
1333 obj = container_of(cq->uobject, struct ib_ucq_object, uobject);
1334
1335 ret = ib_destroy_cq(cq);
1336 if (!ret)
1337 uobj->live = 0;
1338
1339 put_uobj_write(uobj);
1340
1341 if (ret)
1342 return ret;
1343
1344 idr_remove_uobj(&ib_uverbs_cq_idr, uobj);
1345
1346 mutex_lock(&file->mutex);
1347 list_del(&uobj->list);
1348 mutex_unlock(&file->mutex);
1349
1350 ib_uverbs_release_ucq(file, ev_file, obj);
1351
1352 memset(&resp, 0, sizeof resp);
1353 resp.comp_events_reported = obj->comp_events_reported;
1354 resp.async_events_reported = obj->async_events_reported;
1355
1356 put_uobj(uobj);
1357
1358 if (copy_to_user((void __user *) (unsigned long) cmd.response,
1359 &resp, sizeof resp))
1360 return -EFAULT;
1361
1362 return in_len;
1363 }
1364
1365 ssize_t ib_uverbs_create_qp(struct ib_uverbs_file *file,
1366 const char __user *buf, int in_len,
1367 int out_len)
1368 {
1369 struct ib_uverbs_create_qp cmd;
1370 struct ib_uverbs_create_qp_resp resp;
1371 struct ib_udata udata;
1372 struct ib_uqp_object *obj;
1373 struct ib_device *device;
1374 struct ib_pd *pd = NULL;
1375 struct ib_xrcd *xrcd = NULL;
1376 struct ib_uobject *uninitialized_var(xrcd_uobj);
1377 struct ib_cq *scq = NULL, *rcq = NULL;
1378 struct ib_srq *srq = NULL;
1379 struct ib_qp *qp;
1380 struct ib_qp_init_attr attr;
1381 int ret;
1382
1383 if (out_len < sizeof resp)
1384 return -ENOSPC;
1385
1386 if (copy_from_user(&cmd, buf, sizeof cmd))
1387 return -EFAULT;
1388
1389 INIT_UDATA(&udata, buf + sizeof cmd,
1390 (unsigned long) cmd.response + sizeof resp,
1391 in_len - sizeof cmd, out_len - sizeof resp);
1392
1393 obj = kmalloc(sizeof *obj, GFP_KERNEL);
1394 if (!obj)
1395 return -ENOMEM;
1396
1397 init_uobj(&obj->uevent.uobject, cmd.user_handle, file->ucontext, &qp_lock_key);
1398 down_write(&obj->uevent.uobject.mutex);
1399
1400 if (cmd.qp_type == IB_QPT_XRC_TGT) {
1401 xrcd = idr_read_xrcd(cmd.pd_handle, file->ucontext, &xrcd_uobj);
1402 if (!xrcd) {
1403 ret = -EINVAL;
1404 goto err_put;
1405 }
1406 device = xrcd->device;
1407 } else {
1408 pd = idr_read_pd(cmd.pd_handle, file->ucontext);
1409 scq = idr_read_cq(cmd.send_cq_handle, file->ucontext, 0);
1410 if (!pd || !scq) {
1411 ret = -EINVAL;
1412 goto err_put;
1413 }
1414
1415 if (cmd.qp_type == IB_QPT_XRC_INI) {
1416 cmd.max_recv_wr = cmd.max_recv_sge = 0;
1417 } else {
1418 if (cmd.is_srq) {
1419 srq = idr_read_srq(cmd.srq_handle, file->ucontext);
1420 if (!srq || srq->srq_type != IB_SRQT_BASIC) {
1421 ret = -EINVAL;
1422 goto err_put;
1423 }
1424 }
1425 rcq = (cmd.recv_cq_handle == cmd.send_cq_handle) ?
1426 scq : idr_read_cq(cmd.recv_cq_handle, file->ucontext, 1);
1427 if (!rcq) {
1428 ret = -EINVAL;
1429 goto err_put;
1430 }
1431 }
1432 device = pd->device;
1433 }
1434
1435 attr.event_handler = ib_uverbs_qp_event_handler;
1436 attr.qp_context = file;
1437 attr.send_cq = scq;
1438 attr.recv_cq = rcq;
1439 attr.srq = srq;
1440 attr.xrcd = xrcd;
1441 attr.sq_sig_type = cmd.sq_sig_all ? IB_SIGNAL_ALL_WR : IB_SIGNAL_REQ_WR;
1442 attr.qp_type = cmd.qp_type;
1443 attr.create_flags = 0;
1444
1445 attr.cap.max_send_wr = cmd.max_send_wr;
1446 attr.cap.max_recv_wr = cmd.max_recv_wr;
1447 attr.cap.max_send_sge = cmd.max_send_sge;
1448 attr.cap.max_recv_sge = cmd.max_recv_sge;
1449 attr.cap.max_inline_data = cmd.max_inline_data;
1450
1451 obj->uevent.events_reported = 0;
1452 INIT_LIST_HEAD(&obj->uevent.event_list);
1453 INIT_LIST_HEAD(&obj->mcast_list);
1454
1455 if (cmd.qp_type == IB_QPT_XRC_TGT)
1456 qp = ib_create_qp(pd, &attr);
1457 else
1458 qp = device->create_qp(pd, &attr, &udata);
1459
1460 if (IS_ERR(qp)) {
1461 ret = PTR_ERR(qp);
1462 goto err_put;
1463 }
1464
1465 if (cmd.qp_type != IB_QPT_XRC_TGT) {
1466 qp->real_qp = qp;
1467 qp->device = device;
1468 qp->pd = pd;
1469 qp->send_cq = attr.send_cq;
1470 qp->recv_cq = attr.recv_cq;
1471 qp->srq = attr.srq;
1472 qp->event_handler = attr.event_handler;
1473 qp->qp_context = attr.qp_context;
1474 qp->qp_type = attr.qp_type;
1475 atomic_inc(&pd->usecnt);
1476 atomic_inc(&attr.send_cq->usecnt);
1477 if (attr.recv_cq)
1478 atomic_inc(&attr.recv_cq->usecnt);
1479 if (attr.srq)
1480 atomic_inc(&attr.srq->usecnt);
1481 }
1482 qp->uobject = &obj->uevent.uobject;
1483
1484 obj->uevent.uobject.object = qp;
1485 ret = idr_add_uobj(&ib_uverbs_qp_idr, &obj->uevent.uobject);
1486 if (ret)
1487 goto err_destroy;
1488
1489 memset(&resp, 0, sizeof resp);
1490 resp.qpn = qp->qp_num;
1491 resp.qp_handle = obj->uevent.uobject.id;
1492 resp.max_recv_sge = attr.cap.max_recv_sge;
1493 resp.max_send_sge = attr.cap.max_send_sge;
1494 resp.max_recv_wr = attr.cap.max_recv_wr;
1495 resp.max_send_wr = attr.cap.max_send_wr;
1496 resp.max_inline_data = attr.cap.max_inline_data;
1497
1498 if (copy_to_user((void __user *) (unsigned long) cmd.response,
1499 &resp, sizeof resp)) {
1500 ret = -EFAULT;
1501 goto err_copy;
1502 }
1503
1504 if (xrcd)
1505 put_xrcd_read(xrcd_uobj);
1506 if (pd)
1507 put_pd_read(pd);
1508 if (scq)
1509 put_cq_read(scq);
1510 if (rcq && rcq != scq)
1511 put_cq_read(rcq);
1512 if (srq)
1513 put_srq_read(srq);
1514
1515 mutex_lock(&file->mutex);
1516 list_add_tail(&obj->uevent.uobject.list, &file->ucontext->qp_list);
1517 mutex_unlock(&file->mutex);
1518
1519 obj->uevent.uobject.live = 1;
1520
1521 up_write(&obj->uevent.uobject.mutex);
1522
1523 return in_len;
1524
1525 err_copy:
1526 idr_remove_uobj(&ib_uverbs_qp_idr, &obj->uevent.uobject);
1527
1528 err_destroy:
1529 ib_destroy_qp(qp);
1530
1531 err_put:
1532 if (xrcd)
1533 put_xrcd_read(xrcd_uobj);
1534 if (pd)
1535 put_pd_read(pd);
1536 if (scq)
1537 put_cq_read(scq);
1538 if (rcq && rcq != scq)
1539 put_cq_read(rcq);
1540 if (srq)
1541 put_srq_read(srq);
1542
1543 put_uobj_write(&obj->uevent.uobject);
1544 return ret;
1545 }
1546
1547 ssize_t ib_uverbs_open_qp(struct ib_uverbs_file *file,
1548 const char __user *buf, int in_len, int out_len)
1549 {
1550 struct ib_uverbs_open_qp cmd;
1551 struct ib_uverbs_create_qp_resp resp;
1552 struct ib_udata udata;
1553 struct ib_uqp_object *obj;
1554 struct ib_xrcd *xrcd;
1555 struct ib_uobject *uninitialized_var(xrcd_uobj);
1556 struct ib_qp *qp;
1557 struct ib_qp_open_attr attr;
1558 int ret;
1559
1560 if (out_len < sizeof resp)
1561 return -ENOSPC;
1562
1563 if (copy_from_user(&cmd, buf, sizeof cmd))
1564 return -EFAULT;
1565
1566 INIT_UDATA(&udata, buf + sizeof cmd,
1567 (unsigned long) cmd.response + sizeof resp,
1568 in_len - sizeof cmd, out_len - sizeof resp);
1569
1570 obj = kmalloc(sizeof *obj, GFP_KERNEL);
1571 if (!obj)
1572 return -ENOMEM;
1573
1574 init_uobj(&obj->uevent.uobject, cmd.user_handle, file->ucontext, &qp_lock_key);
1575 down_write(&obj->uevent.uobject.mutex);
1576
1577 xrcd = idr_read_xrcd(cmd.pd_handle, file->ucontext, &xrcd_uobj);
1578 if (!xrcd) {
1579 ret = -EINVAL;
1580 goto err_put;
1581 }
1582
1583 attr.event_handler = ib_uverbs_qp_event_handler;
1584 attr.qp_context = file;
1585 attr.qp_num = cmd.qpn;
1586 attr.qp_type = cmd.qp_type;
1587
1588 obj->uevent.events_reported = 0;
1589 INIT_LIST_HEAD(&obj->uevent.event_list);
1590 INIT_LIST_HEAD(&obj->mcast_list);
1591
1592 qp = ib_open_qp(xrcd, &attr);
1593 if (IS_ERR(qp)) {
1594 ret = PTR_ERR(qp);
1595 goto err_put;
1596 }
1597
1598 qp->uobject = &obj->uevent.uobject;
1599
1600 obj->uevent.uobject.object = qp;
1601 ret = idr_add_uobj(&ib_uverbs_qp_idr, &obj->uevent.uobject);
1602 if (ret)
1603 goto err_destroy;
1604
1605 memset(&resp, 0, sizeof resp);
1606 resp.qpn = qp->qp_num;
1607 resp.qp_handle = obj->uevent.uobject.id;
1608
1609 if (copy_to_user((void __user *) (unsigned long) cmd.response,
1610 &resp, sizeof resp)) {
1611 ret = -EFAULT;
1612 goto err_remove;
1613 }
1614
1615 put_xrcd_read(xrcd_uobj);
1616
1617 mutex_lock(&file->mutex);
1618 list_add_tail(&obj->uevent.uobject.list, &file->ucontext->qp_list);
1619 mutex_unlock(&file->mutex);
1620
1621 obj->uevent.uobject.live = 1;
1622
1623 up_write(&obj->uevent.uobject.mutex);
1624
1625 return in_len;
1626
1627 err_remove:
1628 idr_remove_uobj(&ib_uverbs_qp_idr, &obj->uevent.uobject);
1629
1630 err_destroy:
1631 ib_destroy_qp(qp);
1632
1633 err_put:
1634 put_xrcd_read(xrcd_uobj);
1635 put_uobj_write(&obj->uevent.uobject);
1636 return ret;
1637 }
1638
1639 ssize_t ib_uverbs_query_qp(struct ib_uverbs_file *file,
1640 const char __user *buf, int in_len,
1641 int out_len)
1642 {
1643 struct ib_uverbs_query_qp cmd;
1644 struct ib_uverbs_query_qp_resp resp;
1645 struct ib_qp *qp;
1646 struct ib_qp_attr *attr;
1647 struct ib_qp_init_attr *init_attr;
1648 int ret;
1649
1650 if (copy_from_user(&cmd, buf, sizeof cmd))
1651 return -EFAULT;
1652
1653 attr = kmalloc(sizeof *attr, GFP_KERNEL);
1654 init_attr = kmalloc(sizeof *init_attr, GFP_KERNEL);
1655 if (!attr || !init_attr) {
1656 ret = -ENOMEM;
1657 goto out;
1658 }
1659
1660 qp = idr_read_qp(cmd.qp_handle, file->ucontext);
1661 if (!qp) {
1662 ret = -EINVAL;
1663 goto out;
1664 }
1665
1666 ret = ib_query_qp(qp, attr, cmd.attr_mask, init_attr);
1667
1668 put_qp_read(qp);
1669
1670 if (ret)
1671 goto out;
1672
1673 memset(&resp, 0, sizeof resp);
1674
1675 resp.qp_state = attr->qp_state;
1676 resp.cur_qp_state = attr->cur_qp_state;
1677 resp.path_mtu = attr->path_mtu;
1678 resp.path_mig_state = attr->path_mig_state;
1679 resp.qkey = attr->qkey;
1680 resp.rq_psn = attr->rq_psn;
1681 resp.sq_psn = attr->sq_psn;
1682 resp.dest_qp_num = attr->dest_qp_num;
1683 resp.qp_access_flags = attr->qp_access_flags;
1684 resp.pkey_index = attr->pkey_index;
1685 resp.alt_pkey_index = attr->alt_pkey_index;
1686 resp.sq_draining = attr->sq_draining;
1687 resp.max_rd_atomic = attr->max_rd_atomic;
1688 resp.max_dest_rd_atomic = attr->max_dest_rd_atomic;
1689 resp.min_rnr_timer = attr->min_rnr_timer;
1690 resp.port_num = attr->port_num;
1691 resp.timeout = attr->timeout;
1692 resp.retry_cnt = attr->retry_cnt;
1693 resp.rnr_retry = attr->rnr_retry;
1694 resp.alt_port_num = attr->alt_port_num;
1695 resp.alt_timeout = attr->alt_timeout;
1696
1697 memcpy(resp.dest.dgid, attr->ah_attr.grh.dgid.raw, 16);
1698 resp.dest.flow_label = attr->ah_attr.grh.flow_label;
1699 resp.dest.sgid_index = attr->ah_attr.grh.sgid_index;
1700 resp.dest.hop_limit = attr->ah_attr.grh.hop_limit;
1701 resp.dest.traffic_class = attr->ah_attr.grh.traffic_class;
1702 resp.dest.dlid = attr->ah_attr.dlid;
1703 resp.dest.sl = attr->ah_attr.sl;
1704 resp.dest.src_path_bits = attr->ah_attr.src_path_bits;
1705 resp.dest.static_rate = attr->ah_attr.static_rate;
1706 resp.dest.is_global = !!(attr->ah_attr.ah_flags & IB_AH_GRH);
1707 resp.dest.port_num = attr->ah_attr.port_num;
1708
1709 memcpy(resp.alt_dest.dgid, attr->alt_ah_attr.grh.dgid.raw, 16);
1710 resp.alt_dest.flow_label = attr->alt_ah_attr.grh.flow_label;
1711 resp.alt_dest.sgid_index = attr->alt_ah_attr.grh.sgid_index;
1712 resp.alt_dest.hop_limit = attr->alt_ah_attr.grh.hop_limit;
1713 resp.alt_dest.traffic_class = attr->alt_ah_attr.grh.traffic_class;
1714 resp.alt_dest.dlid = attr->alt_ah_attr.dlid;
1715 resp.alt_dest.sl = attr->alt_ah_attr.sl;
1716 resp.alt_dest.src_path_bits = attr->alt_ah_attr.src_path_bits;
1717 resp.alt_dest.static_rate = attr->alt_ah_attr.static_rate;
1718 resp.alt_dest.is_global = !!(attr->alt_ah_attr.ah_flags & IB_AH_GRH);
1719 resp.alt_dest.port_num = attr->alt_ah_attr.port_num;
1720
1721 resp.max_send_wr = init_attr->cap.max_send_wr;
1722 resp.max_recv_wr = init_attr->cap.max_recv_wr;
1723 resp.max_send_sge = init_attr->cap.max_send_sge;
1724 resp.max_recv_sge = init_attr->cap.max_recv_sge;
1725 resp.max_inline_data = init_attr->cap.max_inline_data;
1726 resp.sq_sig_all = init_attr->sq_sig_type == IB_SIGNAL_ALL_WR;
1727
1728 if (copy_to_user((void __user *) (unsigned long) cmd.response,
1729 &resp, sizeof resp))
1730 ret = -EFAULT;
1731
1732 out:
1733 kfree(attr);
1734 kfree(init_attr);
1735
1736 return ret ? ret : in_len;
1737 }
1738
1739 /* Remove ignored fields set in the attribute mask */
1740 static int modify_qp_mask(enum ib_qp_type qp_type, int mask)
1741 {
1742 switch (qp_type) {
1743 case IB_QPT_XRC_INI:
1744 return mask & ~(IB_QP_MAX_DEST_RD_ATOMIC | IB_QP_MIN_RNR_TIMER);
1745 case IB_QPT_XRC_TGT:
1746 return mask & ~(IB_QP_MAX_QP_RD_ATOMIC | IB_QP_RETRY_CNT |
1747 IB_QP_RNR_RETRY);
1748 default:
1749 return mask;
1750 }
1751 }
1752
1753 ssize_t ib_uverbs_modify_qp(struct ib_uverbs_file *file,
1754 const char __user *buf, int in_len,
1755 int out_len)
1756 {
1757 struct ib_uverbs_modify_qp cmd;
1758 struct ib_udata udata;
1759 struct ib_qp *qp;
1760 struct ib_qp_attr *attr;
1761 int ret;
1762
1763 if (copy_from_user(&cmd, buf, sizeof cmd))
1764 return -EFAULT;
1765
1766 INIT_UDATA(&udata, buf + sizeof cmd, NULL, in_len - sizeof cmd,
1767 out_len);
1768
1769 attr = kmalloc(sizeof *attr, GFP_KERNEL);
1770 if (!attr)
1771 return -ENOMEM;
1772
1773 qp = idr_read_qp(cmd.qp_handle, file->ucontext);
1774 if (!qp) {
1775 ret = -EINVAL;
1776 goto out;
1777 }
1778
1779 attr->qp_state = cmd.qp_state;
1780 attr->cur_qp_state = cmd.cur_qp_state;
1781 attr->path_mtu = cmd.path_mtu;
1782 attr->path_mig_state = cmd.path_mig_state;
1783 attr->qkey = cmd.qkey;
1784 attr->rq_psn = cmd.rq_psn;
1785 attr->sq_psn = cmd.sq_psn;
1786 attr->dest_qp_num = cmd.dest_qp_num;
1787 attr->qp_access_flags = cmd.qp_access_flags;
1788 attr->pkey_index = cmd.pkey_index;
1789 attr->alt_pkey_index = cmd.alt_pkey_index;
1790 attr->en_sqd_async_notify = cmd.en_sqd_async_notify;
1791 attr->max_rd_atomic = cmd.max_rd_atomic;
1792 attr->max_dest_rd_atomic = cmd.max_dest_rd_atomic;
1793 attr->min_rnr_timer = cmd.min_rnr_timer;
1794 attr->port_num = cmd.port_num;
1795 attr->timeout = cmd.timeout;
1796 attr->retry_cnt = cmd.retry_cnt;
1797 attr->rnr_retry = cmd.rnr_retry;
1798 attr->alt_port_num = cmd.alt_port_num;
1799 attr->alt_timeout = cmd.alt_timeout;
1800
1801 memcpy(attr->ah_attr.grh.dgid.raw, cmd.dest.dgid, 16);
1802 attr->ah_attr.grh.flow_label = cmd.dest.flow_label;
1803 attr->ah_attr.grh.sgid_index = cmd.dest.sgid_index;
1804 attr->ah_attr.grh.hop_limit = cmd.dest.hop_limit;
1805 attr->ah_attr.grh.traffic_class = cmd.dest.traffic_class;
1806 attr->ah_attr.dlid = cmd.dest.dlid;
1807 attr->ah_attr.sl = cmd.dest.sl;
1808 attr->ah_attr.src_path_bits = cmd.dest.src_path_bits;
1809 attr->ah_attr.static_rate = cmd.dest.static_rate;
1810 attr->ah_attr.ah_flags = cmd.dest.is_global ? IB_AH_GRH : 0;
1811 attr->ah_attr.port_num = cmd.dest.port_num;
1812
1813 memcpy(attr->alt_ah_attr.grh.dgid.raw, cmd.alt_dest.dgid, 16);
1814 attr->alt_ah_attr.grh.flow_label = cmd.alt_dest.flow_label;
1815 attr->alt_ah_attr.grh.sgid_index = cmd.alt_dest.sgid_index;
1816 attr->alt_ah_attr.grh.hop_limit = cmd.alt_dest.hop_limit;
1817 attr->alt_ah_attr.grh.traffic_class = cmd.alt_dest.traffic_class;
1818 attr->alt_ah_attr.dlid = cmd.alt_dest.dlid;
1819 attr->alt_ah_attr.sl = cmd.alt_dest.sl;
1820 attr->alt_ah_attr.src_path_bits = cmd.alt_dest.src_path_bits;
1821 attr->alt_ah_attr.static_rate = cmd.alt_dest.static_rate;
1822 attr->alt_ah_attr.ah_flags = cmd.alt_dest.is_global ? IB_AH_GRH : 0;
1823 attr->alt_ah_attr.port_num = cmd.alt_dest.port_num;
1824
1825 if (qp->real_qp == qp) {
1826 ret = qp->device->modify_qp(qp, attr,
1827 modify_qp_mask(qp->qp_type, cmd.attr_mask), &udata);
1828 } else {
1829 ret = ib_modify_qp(qp, attr, modify_qp_mask(qp->qp_type, cmd.attr_mask));
1830 }
1831
1832 put_qp_read(qp);
1833
1834 if (ret)
1835 goto out;
1836
1837 ret = in_len;
1838
1839 out:
1840 kfree(attr);
1841
1842 return ret;
1843 }
1844
1845 ssize_t ib_uverbs_destroy_qp(struct ib_uverbs_file *file,
1846 const char __user *buf, int in_len,
1847 int out_len)
1848 {
1849 struct ib_uverbs_destroy_qp cmd;
1850 struct ib_uverbs_destroy_qp_resp resp;
1851 struct ib_uobject *uobj;
1852 struct ib_qp *qp;
1853 struct ib_uqp_object *obj;
1854 int ret = -EINVAL;
1855
1856 if (copy_from_user(&cmd, buf, sizeof cmd))
1857 return -EFAULT;
1858
1859 memset(&resp, 0, sizeof resp);
1860
1861 uobj = idr_write_uobj(&ib_uverbs_qp_idr, cmd.qp_handle, file->ucontext);
1862 if (!uobj)
1863 return -EINVAL;
1864 qp = uobj->object;
1865 obj = container_of(uobj, struct ib_uqp_object, uevent.uobject);
1866
1867 if (!list_empty(&obj->mcast_list)) {
1868 put_uobj_write(uobj);
1869 return -EBUSY;
1870 }
1871
1872 ret = ib_destroy_qp(qp);
1873 if (!ret)
1874 uobj->live = 0;
1875
1876 put_uobj_write(uobj);
1877
1878 if (ret)
1879 return ret;
1880
1881 idr_remove_uobj(&ib_uverbs_qp_idr, uobj);
1882
1883 mutex_lock(&file->mutex);
1884 list_del(&uobj->list);
1885 mutex_unlock(&file->mutex);
1886
1887 ib_uverbs_release_uevent(file, &obj->uevent);
1888
1889 resp.events_reported = obj->uevent.events_reported;
1890
1891 put_uobj(uobj);
1892
1893 if (copy_to_user((void __user *) (unsigned long) cmd.response,
1894 &resp, sizeof resp))
1895 return -EFAULT;
1896
1897 return in_len;
1898 }
1899
1900 ssize_t ib_uverbs_post_send(struct ib_uverbs_file *file,
1901 const char __user *buf, int in_len,
1902 int out_len)
1903 {
1904 struct ib_uverbs_post_send cmd;
1905 struct ib_uverbs_post_send_resp resp;
1906 struct ib_uverbs_send_wr *user_wr;
1907 struct ib_send_wr *wr = NULL, *last, *next, *bad_wr;
1908 struct ib_qp *qp;
1909 int i, sg_ind;
1910 int is_ud;
1911 ssize_t ret = -EINVAL;
1912
1913 if (copy_from_user(&cmd, buf, sizeof cmd))
1914 return -EFAULT;
1915
1916 if (in_len < sizeof cmd + cmd.wqe_size * cmd.wr_count +
1917 cmd.sge_count * sizeof (struct ib_uverbs_sge))
1918 return -EINVAL;
1919
1920 if (cmd.wqe_size < sizeof (struct ib_uverbs_send_wr))
1921 return -EINVAL;
1922
1923 user_wr = kmalloc(cmd.wqe_size, GFP_KERNEL);
1924 if (!user_wr)
1925 return -ENOMEM;
1926
1927 qp = idr_read_qp(cmd.qp_handle, file->ucontext);
1928 if (!qp)
1929 goto out;
1930
1931 is_ud = qp->qp_type == IB_QPT_UD;
1932 sg_ind = 0;
1933 last = NULL;
1934 for (i = 0; i < cmd.wr_count; ++i) {
1935 if (copy_from_user(user_wr,
1936 buf + sizeof cmd + i * cmd.wqe_size,
1937 cmd.wqe_size)) {
1938 ret = -EFAULT;
1939 goto out_put;
1940 }
1941
1942 if (user_wr->num_sge + sg_ind > cmd.sge_count) {
1943 ret = -EINVAL;
1944 goto out_put;
1945 }
1946
1947 next = kmalloc(ALIGN(sizeof *next, sizeof (struct ib_sge)) +
1948 user_wr->num_sge * sizeof (struct ib_sge),
1949 GFP_KERNEL);
1950 if (!next) {
1951 ret = -ENOMEM;
1952 goto out_put;
1953 }
1954
1955 if (!last)
1956 wr = next;
1957 else
1958 last->next = next;
1959 last = next;
1960
1961 next->next = NULL;
1962 next->wr_id = user_wr->wr_id;
1963 next->num_sge = user_wr->num_sge;
1964 next->opcode = user_wr->opcode;
1965 next->send_flags = user_wr->send_flags;
1966
1967 if (is_ud) {
1968 next->wr.ud.ah = idr_read_ah(user_wr->wr.ud.ah,
1969 file->ucontext);
1970 if (!next->wr.ud.ah) {
1971 ret = -EINVAL;
1972 goto out_put;
1973 }
1974 next->wr.ud.remote_qpn = user_wr->wr.ud.remote_qpn;
1975 next->wr.ud.remote_qkey = user_wr->wr.ud.remote_qkey;
1976 } else {
1977 switch (next->opcode) {
1978 case IB_WR_RDMA_WRITE_WITH_IMM:
1979 next->ex.imm_data =
1980 (__be32 __force) user_wr->ex.imm_data;
1981 case IB_WR_RDMA_WRITE:
1982 case IB_WR_RDMA_READ:
1983 next->wr.rdma.remote_addr =
1984 user_wr->wr.rdma.remote_addr;
1985 next->wr.rdma.rkey =
1986 user_wr->wr.rdma.rkey;
1987 break;
1988 case IB_WR_SEND_WITH_IMM:
1989 next->ex.imm_data =
1990 (__be32 __force) user_wr->ex.imm_data;
1991 break;
1992 case IB_WR_SEND_WITH_INV:
1993 next->ex.invalidate_rkey =
1994 user_wr->ex.invalidate_rkey;
1995 break;
1996 case IB_WR_ATOMIC_CMP_AND_SWP:
1997 case IB_WR_ATOMIC_FETCH_AND_ADD:
1998 next->wr.atomic.remote_addr =
1999 user_wr->wr.atomic.remote_addr;
2000 next->wr.atomic.compare_add =
2001 user_wr->wr.atomic.compare_add;
2002 next->wr.atomic.swap = user_wr->wr.atomic.swap;
2003 next->wr.atomic.rkey = user_wr->wr.atomic.rkey;
2004 break;
2005 default:
2006 break;
2007 }
2008 }
2009
2010 if (next->num_sge) {
2011 next->sg_list = (void *) next +
2012 ALIGN(sizeof *next, sizeof (struct ib_sge));
2013 if (copy_from_user(next->sg_list,
2014 buf + sizeof cmd +
2015 cmd.wr_count * cmd.wqe_size +
2016 sg_ind * sizeof (struct ib_sge),
2017 next->num_sge * sizeof (struct ib_sge))) {
2018 ret = -EFAULT;
2019 goto out_put;
2020 }
2021 sg_ind += next->num_sge;
2022 } else
2023 next->sg_list = NULL;
2024 }
2025
2026 resp.bad_wr = 0;
2027 ret = qp->device->post_send(qp->real_qp, wr, &bad_wr);
2028 if (ret)
2029 for (next = wr; next; next = next->next) {
2030 ++resp.bad_wr;
2031 if (next == bad_wr)
2032 break;
2033 }
2034
2035 if (copy_to_user((void __user *) (unsigned long) cmd.response,
2036 &resp, sizeof resp))
2037 ret = -EFAULT;
2038
2039 out_put:
2040 put_qp_read(qp);
2041
2042 while (wr) {
2043 if (is_ud && wr->wr.ud.ah)
2044 put_ah_read(wr->wr.ud.ah);
2045 next = wr->next;
2046 kfree(wr);
2047 wr = next;
2048 }
2049
2050 out:
2051 kfree(user_wr);
2052
2053 return ret ? ret : in_len;
2054 }
2055
2056 static struct ib_recv_wr *ib_uverbs_unmarshall_recv(const char __user *buf,
2057 int in_len,
2058 u32 wr_count,
2059 u32 sge_count,
2060 u32 wqe_size)
2061 {
2062 struct ib_uverbs_recv_wr *user_wr;
2063 struct ib_recv_wr *wr = NULL, *last, *next;
2064 int sg_ind;
2065 int i;
2066 int ret;
2067
2068 if (in_len < wqe_size * wr_count +
2069 sge_count * sizeof (struct ib_uverbs_sge))
2070 return ERR_PTR(-EINVAL);
2071
2072 if (wqe_size < sizeof (struct ib_uverbs_recv_wr))
2073 return ERR_PTR(-EINVAL);
2074
2075 user_wr = kmalloc(wqe_size, GFP_KERNEL);
2076 if (!user_wr)
2077 return ERR_PTR(-ENOMEM);
2078
2079 sg_ind = 0;
2080 last = NULL;
2081 for (i = 0; i < wr_count; ++i) {
2082 if (copy_from_user(user_wr, buf + i * wqe_size,
2083 wqe_size)) {
2084 ret = -EFAULT;
2085 goto err;
2086 }
2087
2088 if (user_wr->num_sge + sg_ind > sge_count) {
2089 ret = -EINVAL;
2090 goto err;
2091 }
2092
2093 next = kmalloc(ALIGN(sizeof *next, sizeof (struct ib_sge)) +
2094 user_wr->num_sge * sizeof (struct ib_sge),
2095 GFP_KERNEL);
2096 if (!next) {
2097 ret = -ENOMEM;
2098 goto err;
2099 }
2100
2101 if (!last)
2102 wr = next;
2103 else
2104 last->next = next;
2105 last = next;
2106
2107 next->next = NULL;
2108 next->wr_id = user_wr->wr_id;
2109 next->num_sge = user_wr->num_sge;
2110
2111 if (next->num_sge) {
2112 next->sg_list = (void *) next +
2113 ALIGN(sizeof *next, sizeof (struct ib_sge));
2114 if (copy_from_user(next->sg_list,
2115 buf + wr_count * wqe_size +
2116 sg_ind * sizeof (struct ib_sge),
2117 next->num_sge * sizeof (struct ib_sge))) {
2118 ret = -EFAULT;
2119 goto err;
2120 }
2121 sg_ind += next->num_sge;
2122 } else
2123 next->sg_list = NULL;
2124 }
2125
2126 kfree(user_wr);
2127 return wr;
2128
2129 err:
2130 kfree(user_wr);
2131
2132 while (wr) {
2133 next = wr->next;
2134 kfree(wr);
2135 wr = next;
2136 }
2137
2138 return ERR_PTR(ret);
2139 }
2140
2141 ssize_t ib_uverbs_post_recv(struct ib_uverbs_file *file,
2142 const char __user *buf, int in_len,
2143 int out_len)
2144 {
2145 struct ib_uverbs_post_recv cmd;
2146 struct ib_uverbs_post_recv_resp resp;
2147 struct ib_recv_wr *wr, *next, *bad_wr;
2148 struct ib_qp *qp;
2149 ssize_t ret = -EINVAL;
2150
2151 if (copy_from_user(&cmd, buf, sizeof cmd))
2152 return -EFAULT;
2153
2154 wr = ib_uverbs_unmarshall_recv(buf + sizeof cmd,
2155 in_len - sizeof cmd, cmd.wr_count,
2156 cmd.sge_count, cmd.wqe_size);
2157 if (IS_ERR(wr))
2158 return PTR_ERR(wr);
2159
2160 qp = idr_read_qp(cmd.qp_handle, file->ucontext);
2161 if (!qp)
2162 goto out;
2163
2164 resp.bad_wr = 0;
2165 ret = qp->device->post_recv(qp->real_qp, wr, &bad_wr);
2166
2167 put_qp_read(qp);
2168
2169 if (ret)
2170 for (next = wr; next; next = next->next) {
2171 ++resp.bad_wr;
2172 if (next == bad_wr)
2173 break;
2174 }
2175
2176 if (copy_to_user((void __user *) (unsigned long) cmd.response,
2177 &resp, sizeof resp))
2178 ret = -EFAULT;
2179
2180 out:
2181 while (wr) {
2182 next = wr->next;
2183 kfree(wr);
2184 wr = next;
2185 }
2186
2187 return ret ? ret : in_len;
2188 }
2189
2190 ssize_t ib_uverbs_post_srq_recv(struct ib_uverbs_file *file,
2191 const char __user *buf, int in_len,
2192 int out_len)
2193 {
2194 struct ib_uverbs_post_srq_recv cmd;
2195 struct ib_uverbs_post_srq_recv_resp resp;
2196 struct ib_recv_wr *wr, *next, *bad_wr;
2197 struct ib_srq *srq;
2198 ssize_t ret = -EINVAL;
2199
2200 if (copy_from_user(&cmd, buf, sizeof cmd))
2201 return -EFAULT;
2202
2203 wr = ib_uverbs_unmarshall_recv(buf + sizeof cmd,
2204 in_len - sizeof cmd, cmd.wr_count,
2205 cmd.sge_count, cmd.wqe_size);
2206 if (IS_ERR(wr))
2207 return PTR_ERR(wr);
2208
2209 srq = idr_read_srq(cmd.srq_handle, file->ucontext);
2210 if (!srq)
2211 goto out;
2212
2213 resp.bad_wr = 0;
2214 ret = srq->device->post_srq_recv(srq, wr, &bad_wr);
2215
2216 put_srq_read(srq);
2217
2218 if (ret)
2219 for (next = wr; next; next = next->next) {
2220 ++resp.bad_wr;
2221 if (next == bad_wr)
2222 break;
2223 }
2224
2225 if (copy_to_user((void __user *) (unsigned long) cmd.response,
2226 &resp, sizeof resp))
2227 ret = -EFAULT;
2228
2229 out:
2230 while (wr) {
2231 next = wr->next;
2232 kfree(wr);
2233 wr = next;
2234 }
2235
2236 return ret ? ret : in_len;
2237 }
2238
2239 ssize_t ib_uverbs_create_ah(struct ib_uverbs_file *file,
2240 const char __user *buf, int in_len,
2241 int out_len)
2242 {
2243 struct ib_uverbs_create_ah cmd;
2244 struct ib_uverbs_create_ah_resp resp;
2245 struct ib_uobject *uobj;
2246 struct ib_pd *pd;
2247 struct ib_ah *ah;
2248 struct ib_ah_attr attr;
2249 int ret;
2250
2251 if (out_len < sizeof resp)
2252 return -ENOSPC;
2253
2254 if (copy_from_user(&cmd, buf, sizeof cmd))
2255 return -EFAULT;
2256
2257 uobj = kmalloc(sizeof *uobj, GFP_KERNEL);
2258 if (!uobj)
2259 return -ENOMEM;
2260
2261 init_uobj(uobj, cmd.user_handle, file->ucontext, &ah_lock_key);
2262 down_write(&uobj->mutex);
2263
2264 pd = idr_read_pd(cmd.pd_handle, file->ucontext);
2265 if (!pd) {
2266 ret = -EINVAL;
2267 goto err;
2268 }
2269
2270 attr.dlid = cmd.attr.dlid;
2271 attr.sl = cmd.attr.sl;
2272 attr.src_path_bits = cmd.attr.src_path_bits;
2273 attr.static_rate = cmd.attr.static_rate;
2274 attr.ah_flags = cmd.attr.is_global ? IB_AH_GRH : 0;
2275 attr.port_num = cmd.attr.port_num;
2276 attr.grh.flow_label = cmd.attr.grh.flow_label;
2277 attr.grh.sgid_index = cmd.attr.grh.sgid_index;
2278 attr.grh.hop_limit = cmd.attr.grh.hop_limit;
2279 attr.grh.traffic_class = cmd.attr.grh.traffic_class;
2280 memcpy(attr.grh.dgid.raw, cmd.attr.grh.dgid, 16);
2281
2282 ah = ib_create_ah(pd, &attr);
2283 if (IS_ERR(ah)) {
2284 ret = PTR_ERR(ah);
2285 goto err_put;
2286 }
2287
2288 ah->uobject = uobj;
2289 uobj->object = ah;
2290
2291 ret = idr_add_uobj(&ib_uverbs_ah_idr, uobj);
2292 if (ret)
2293 goto err_destroy;
2294
2295 resp.ah_handle = uobj->id;
2296
2297 if (copy_to_user((void __user *) (unsigned long) cmd.response,
2298 &resp, sizeof resp)) {
2299 ret = -EFAULT;
2300 goto err_copy;
2301 }
2302
2303 put_pd_read(pd);
2304
2305 mutex_lock(&file->mutex);
2306 list_add_tail(&uobj->list, &file->ucontext->ah_list);
2307 mutex_unlock(&file->mutex);
2308
2309 uobj->live = 1;
2310
2311 up_write(&uobj->mutex);
2312
2313 return in_len;
2314
2315 err_copy:
2316 idr_remove_uobj(&ib_uverbs_ah_idr, uobj);
2317
2318 err_destroy:
2319 ib_destroy_ah(ah);
2320
2321 err_put:
2322 put_pd_read(pd);
2323
2324 err:
2325 put_uobj_write(uobj);
2326 return ret;
2327 }
2328
2329 ssize_t ib_uverbs_destroy_ah(struct ib_uverbs_file *file,
2330 const char __user *buf, int in_len, int out_len)
2331 {
2332 struct ib_uverbs_destroy_ah cmd;
2333 struct ib_ah *ah;
2334 struct ib_uobject *uobj;
2335 int ret;
2336
2337 if (copy_from_user(&cmd, buf, sizeof cmd))
2338 return -EFAULT;
2339
2340 uobj = idr_write_uobj(&ib_uverbs_ah_idr, cmd.ah_handle, file->ucontext);
2341 if (!uobj)
2342 return -EINVAL;
2343 ah = uobj->object;
2344
2345 ret = ib_destroy_ah(ah);
2346 if (!ret)
2347 uobj->live = 0;
2348
2349 put_uobj_write(uobj);
2350
2351 if (ret)
2352 return ret;
2353
2354 idr_remove_uobj(&ib_uverbs_ah_idr, uobj);
2355
2356 mutex_lock(&file->mutex);
2357 list_del(&uobj->list);
2358 mutex_unlock(&file->mutex);
2359
2360 put_uobj(uobj);
2361
2362 return in_len;
2363 }
2364
2365 ssize_t ib_uverbs_attach_mcast(struct ib_uverbs_file *file,
2366 const char __user *buf, int in_len,
2367 int out_len)
2368 {
2369 struct ib_uverbs_attach_mcast cmd;
2370 struct ib_qp *qp;
2371 struct ib_uqp_object *obj;
2372 struct ib_uverbs_mcast_entry *mcast;
2373 int ret;
2374
2375 if (copy_from_user(&cmd, buf, sizeof cmd))
2376 return -EFAULT;
2377
2378 qp = idr_read_qp(cmd.qp_handle, file->ucontext);
2379 if (!qp)
2380 return -EINVAL;
2381
2382 obj = container_of(qp->uobject, struct ib_uqp_object, uevent.uobject);
2383
2384 list_for_each_entry(mcast, &obj->mcast_list, list)
2385 if (cmd.mlid == mcast->lid &&
2386 !memcmp(cmd.gid, mcast->gid.raw, sizeof mcast->gid.raw)) {
2387 ret = 0;
2388 goto out_put;
2389 }
2390
2391 mcast = kmalloc(sizeof *mcast, GFP_KERNEL);
2392 if (!mcast) {
2393 ret = -ENOMEM;
2394 goto out_put;
2395 }
2396
2397 mcast->lid = cmd.mlid;
2398 memcpy(mcast->gid.raw, cmd.gid, sizeof mcast->gid.raw);
2399
2400 ret = ib_attach_mcast(qp, &mcast->gid, cmd.mlid);
2401 if (!ret)
2402 list_add_tail(&mcast->list, &obj->mcast_list);
2403 else
2404 kfree(mcast);
2405
2406 out_put:
2407 put_qp_read(qp);
2408
2409 return ret ? ret : in_len;
2410 }
2411
2412 ssize_t ib_uverbs_detach_mcast(struct ib_uverbs_file *file,
2413 const char __user *buf, int in_len,
2414 int out_len)
2415 {
2416 struct ib_uverbs_detach_mcast cmd;
2417 struct ib_uqp_object *obj;
2418 struct ib_qp *qp;
2419 struct ib_uverbs_mcast_entry *mcast;
2420 int ret = -EINVAL;
2421
2422 if (copy_from_user(&cmd, buf, sizeof cmd))
2423 return -EFAULT;
2424
2425 qp = idr_read_qp(cmd.qp_handle, file->ucontext);
2426 if (!qp)
2427 return -EINVAL;
2428
2429 ret = ib_detach_mcast(qp, (union ib_gid *) cmd.gid, cmd.mlid);
2430 if (ret)
2431 goto out_put;
2432
2433 obj = container_of(qp->uobject, struct ib_uqp_object, uevent.uobject);
2434
2435 list_for_each_entry(mcast, &obj->mcast_list, list)
2436 if (cmd.mlid == mcast->lid &&
2437 !memcmp(cmd.gid, mcast->gid.raw, sizeof mcast->gid.raw)) {
2438 list_del(&mcast->list);
2439 kfree(mcast);
2440 break;
2441 }
2442
2443 out_put:
2444 put_qp_read(qp);
2445
2446 return ret ? ret : in_len;
2447 }
2448
2449 int __uverbs_create_xsrq(struct ib_uverbs_file *file,
2450 struct ib_uverbs_create_xsrq *cmd,
2451 struct ib_udata *udata)
2452 {
2453 struct ib_uverbs_create_srq_resp resp;
2454 struct ib_usrq_object *obj;
2455 struct ib_pd *pd;
2456 struct ib_srq *srq;
2457 struct ib_uobject *uninitialized_var(xrcd_uobj);
2458 struct ib_srq_init_attr attr;
2459 int ret;
2460
2461 obj = kmalloc(sizeof *obj, GFP_KERNEL);
2462 if (!obj)
2463 return -ENOMEM;
2464
2465 init_uobj(&obj->uevent.uobject, cmd->user_handle, file->ucontext, &srq_lock_key);
2466 down_write(&obj->uevent.uobject.mutex);
2467
2468 pd = idr_read_pd(cmd->pd_handle, file->ucontext);
2469 if (!pd) {
2470 ret = -EINVAL;
2471 goto err;
2472 }
2473
2474 if (cmd->srq_type == IB_SRQT_XRC) {
2475 attr.ext.xrc.cq = idr_read_cq(cmd->cq_handle, file->ucontext, 0);
2476 if (!attr.ext.xrc.cq) {
2477 ret = -EINVAL;
2478 goto err_put_pd;
2479 }
2480
2481 attr.ext.xrc.xrcd = idr_read_xrcd(cmd->xrcd_handle, file->ucontext, &xrcd_uobj);
2482 if (!attr.ext.xrc.xrcd) {
2483 ret = -EINVAL;
2484 goto err_put_cq;
2485 }
2486
2487 obj->uxrcd = container_of(xrcd_uobj, struct ib_uxrcd_object, uobject);
2488 atomic_inc(&obj->uxrcd->refcnt);
2489 }
2490
2491 attr.event_handler = ib_uverbs_srq_event_handler;
2492 attr.srq_context = file;
2493 attr.srq_type = cmd->srq_type;
2494 attr.attr.max_wr = cmd->max_wr;
2495 attr.attr.max_sge = cmd->max_sge;
2496 attr.attr.srq_limit = cmd->srq_limit;
2497
2498 obj->uevent.events_reported = 0;
2499 INIT_LIST_HEAD(&obj->uevent.event_list);
2500
2501 srq = pd->device->create_srq(pd, &attr, udata);
2502 if (IS_ERR(srq)) {
2503 ret = PTR_ERR(srq);
2504 goto err_put;
2505 }
2506
2507 srq->device = pd->device;
2508 srq->pd = pd;
2509 srq->srq_type = cmd->srq_type;
2510 srq->uobject = &obj->uevent.uobject;
2511 srq->event_handler = attr.event_handler;
2512 srq->srq_context = attr.srq_context;
2513
2514 if (cmd->srq_type == IB_SRQT_XRC) {
2515 srq->ext.xrc.cq = attr.ext.xrc.cq;
2516 srq->ext.xrc.xrcd = attr.ext.xrc.xrcd;
2517 atomic_inc(&attr.ext.xrc.cq->usecnt);
2518 atomic_inc(&attr.ext.xrc.xrcd->usecnt);
2519 }
2520
2521 atomic_inc(&pd->usecnt);
2522 atomic_set(&srq->usecnt, 0);
2523
2524 obj->uevent.uobject.object = srq;
2525 ret = idr_add_uobj(&ib_uverbs_srq_idr, &obj->uevent.uobject);
2526 if (ret)
2527 goto err_destroy;
2528
2529 memset(&resp, 0, sizeof resp);
2530 resp.srq_handle = obj->uevent.uobject.id;
2531 resp.max_wr = attr.attr.max_wr;
2532 resp.max_sge = attr.attr.max_sge;
2533 if (cmd->srq_type == IB_SRQT_XRC)
2534 resp.srqn = srq->ext.xrc.srq_num;
2535
2536 if (copy_to_user((void __user *) (unsigned long) cmd->response,
2537 &resp, sizeof resp)) {
2538 ret = -EFAULT;
2539 goto err_copy;
2540 }
2541
2542 if (cmd->srq_type == IB_SRQT_XRC) {
2543 put_uobj_read(xrcd_uobj);
2544 put_cq_read(attr.ext.xrc.cq);
2545 }
2546 put_pd_read(pd);
2547
2548 mutex_lock(&file->mutex);
2549 list_add_tail(&obj->uevent.uobject.list, &file->ucontext->srq_list);
2550 mutex_unlock(&file->mutex);
2551
2552 obj->uevent.uobject.live = 1;
2553
2554 up_write(&obj->uevent.uobject.mutex);
2555
2556 return 0;
2557
2558 err_copy:
2559 idr_remove_uobj(&ib_uverbs_srq_idr, &obj->uevent.uobject);
2560
2561 err_destroy:
2562 ib_destroy_srq(srq);
2563
2564 err_put:
2565 if (cmd->srq_type == IB_SRQT_XRC) {
2566 atomic_dec(&obj->uxrcd->refcnt);
2567 put_uobj_read(xrcd_uobj);
2568 }
2569
2570 err_put_cq:
2571 if (cmd->srq_type == IB_SRQT_XRC)
2572 put_cq_read(attr.ext.xrc.cq);
2573
2574 err_put_pd:
2575 put_pd_read(pd);
2576
2577 err:
2578 put_uobj_write(&obj->uevent.uobject);
2579 return ret;
2580 }
2581
2582 ssize_t ib_uverbs_create_srq(struct ib_uverbs_file *file,
2583 const char __user *buf, int in_len,
2584 int out_len)
2585 {
2586 struct ib_uverbs_create_srq cmd;
2587 struct ib_uverbs_create_xsrq xcmd;
2588 struct ib_uverbs_create_srq_resp resp;
2589 struct ib_udata udata;
2590 int ret;
2591
2592 if (out_len < sizeof resp)
2593 return -ENOSPC;
2594
2595 if (copy_from_user(&cmd, buf, sizeof cmd))
2596 return -EFAULT;
2597
2598 xcmd.response = cmd.response;
2599 xcmd.user_handle = cmd.user_handle;
2600 xcmd.srq_type = IB_SRQT_BASIC;
2601 xcmd.pd_handle = cmd.pd_handle;
2602 xcmd.max_wr = cmd.max_wr;
2603 xcmd.max_sge = cmd.max_sge;
2604 xcmd.srq_limit = cmd.srq_limit;
2605
2606 INIT_UDATA(&udata, buf + sizeof cmd,
2607 (unsigned long) cmd.response + sizeof resp,
2608 in_len - sizeof cmd, out_len - sizeof resp);
2609
2610 ret = __uverbs_create_xsrq(file, &xcmd, &udata);
2611 if (ret)
2612 return ret;
2613
2614 return in_len;
2615 }
2616
2617 ssize_t ib_uverbs_create_xsrq(struct ib_uverbs_file *file,
2618 const char __user *buf, int in_len, int out_len)
2619 {
2620 struct ib_uverbs_create_xsrq cmd;
2621 struct ib_uverbs_create_srq_resp resp;
2622 struct ib_udata udata;
2623 int ret;
2624
2625 if (out_len < sizeof resp)
2626 return -ENOSPC;
2627
2628 if (copy_from_user(&cmd, buf, sizeof cmd))
2629 return -EFAULT;
2630
2631 INIT_UDATA(&udata, buf + sizeof cmd,
2632 (unsigned long) cmd.response + sizeof resp,
2633 in_len - sizeof cmd, out_len - sizeof resp);
2634
2635 ret = __uverbs_create_xsrq(file, &cmd, &udata);
2636 if (ret)
2637 return ret;
2638
2639 return in_len;
2640 }
2641
2642 ssize_t ib_uverbs_modify_srq(struct ib_uverbs_file *file,
2643 const char __user *buf, int in_len,
2644 int out_len)
2645 {
2646 struct ib_uverbs_modify_srq cmd;
2647 struct ib_udata udata;
2648 struct ib_srq *srq;
2649 struct ib_srq_attr attr;
2650 int ret;
2651
2652 if (copy_from_user(&cmd, buf, sizeof cmd))
2653 return -EFAULT;
2654
2655 INIT_UDATA(&udata, buf + sizeof cmd, NULL, in_len - sizeof cmd,
2656 out_len);
2657
2658 srq = idr_read_srq(cmd.srq_handle, file->ucontext);
2659 if (!srq)
2660 return -EINVAL;
2661
2662 attr.max_wr = cmd.max_wr;
2663 attr.srq_limit = cmd.srq_limit;
2664
2665 ret = srq->device->modify_srq(srq, &attr, cmd.attr_mask, &udata);
2666
2667 put_srq_read(srq);
2668
2669 return ret ? ret : in_len;
2670 }
2671
2672 ssize_t ib_uverbs_query_srq(struct ib_uverbs_file *file,
2673 const char __user *buf,
2674 int in_len, int out_len)
2675 {
2676 struct ib_uverbs_query_srq cmd;
2677 struct ib_uverbs_query_srq_resp resp;
2678 struct ib_srq_attr attr;
2679 struct ib_srq *srq;
2680 int ret;
2681
2682 if (out_len < sizeof resp)
2683 return -ENOSPC;
2684
2685 if (copy_from_user(&cmd, buf, sizeof cmd))
2686 return -EFAULT;
2687
2688 srq = idr_read_srq(cmd.srq_handle, file->ucontext);
2689 if (!srq)
2690 return -EINVAL;
2691
2692 ret = ib_query_srq(srq, &attr);
2693
2694 put_srq_read(srq);
2695
2696 if (ret)
2697 return ret;
2698
2699 memset(&resp, 0, sizeof resp);
2700
2701 resp.max_wr = attr.max_wr;
2702 resp.max_sge = attr.max_sge;
2703 resp.srq_limit = attr.srq_limit;
2704
2705 if (copy_to_user((void __user *) (unsigned long) cmd.response,
2706 &resp, sizeof resp))
2707 return -EFAULT;
2708
2709 return in_len;
2710 }
2711
2712 ssize_t ib_uverbs_destroy_srq(struct ib_uverbs_file *file,
2713 const char __user *buf, int in_len,
2714 int out_len)
2715 {
2716 struct ib_uverbs_destroy_srq cmd;
2717 struct ib_uverbs_destroy_srq_resp resp;
2718 struct ib_uobject *uobj;
2719 struct ib_srq *srq;
2720 struct ib_uevent_object *obj;
2721 int ret = -EINVAL;
2722
2723 if (copy_from_user(&cmd, buf, sizeof cmd))
2724 return -EFAULT;
2725
2726 uobj = idr_write_uobj(&ib_uverbs_srq_idr, cmd.srq_handle, file->ucontext);
2727 if (!uobj)
2728 return -EINVAL;
2729 srq = uobj->object;
2730 obj = container_of(uobj, struct ib_uevent_object, uobject);
2731
2732 ret = ib_destroy_srq(srq);
2733 if (!ret)
2734 uobj->live = 0;
2735
2736 put_uobj_write(uobj);
2737
2738 if (ret)
2739 return ret;
2740
2741 idr_remove_uobj(&ib_uverbs_srq_idr, uobj);
2742
2743 mutex_lock(&file->mutex);
2744 list_del(&uobj->list);
2745 mutex_unlock(&file->mutex);
2746
2747 ib_uverbs_release_uevent(file, obj);
2748
2749 memset(&resp, 0, sizeof resp);
2750 resp.events_reported = obj->events_reported;
2751
2752 put_uobj(uobj);
2753
2754 if (copy_to_user((void __user *) (unsigned long) cmd.response,
2755 &resp, sizeof resp))
2756 ret = -EFAULT;
2757
2758 return ret ? ret : in_len;
2759 }
Linux kernel - Deliverables
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