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4d27e4c3fe34badbe941e735edaf9d8fb33b61f2
[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 struct ib_qp *idr_write_qp(int qp_handle, struct ib_ucontext *context)
245 {
246 struct ib_uobject *uobj;
247
248 uobj = idr_write_uobj(&ib_uverbs_qp_idr, qp_handle, context);
249 return uobj ? uobj->object : NULL;
250 }
251
252 static void put_qp_read(struct ib_qp *qp)
253 {
254 put_uobj_read(qp->uobject);
255 }
256
257 static void put_qp_write(struct ib_qp *qp)
258 {
259 put_uobj_write(qp->uobject);
260 }
261
262 static struct ib_srq *idr_read_srq(int srq_handle, struct ib_ucontext *context)
263 {
264 return idr_read_obj(&ib_uverbs_srq_idr, srq_handle, context, 0);
265 }
266
267 static void put_srq_read(struct ib_srq *srq)
268 {
269 put_uobj_read(srq->uobject);
270 }
271
272 static struct ib_xrcd *idr_read_xrcd(int xrcd_handle, struct ib_ucontext *context,
273 struct ib_uobject **uobj)
274 {
275 *uobj = idr_read_uobj(&ib_uverbs_xrcd_idr, xrcd_handle, context, 0);
276 return *uobj ? (*uobj)->object : NULL;
277 }
278
279 static void put_xrcd_read(struct ib_uobject *uobj)
280 {
281 put_uobj_read(uobj);
282 }
283
284 ssize_t ib_uverbs_get_context(struct ib_uverbs_file *file,
285 const char __user *buf,
286 int in_len, int out_len)
287 {
288 struct ib_uverbs_get_context cmd;
289 struct ib_uverbs_get_context_resp resp;
290 struct ib_udata udata;
291 struct ib_device *ibdev = file->device->ib_dev;
292 struct ib_ucontext *ucontext;
293 struct file *filp;
294 int ret;
295
296 if (out_len < sizeof resp)
297 return -ENOSPC;
298
299 if (copy_from_user(&cmd, buf, sizeof cmd))
300 return -EFAULT;
301
302 mutex_lock(&file->mutex);
303
304 if (file->ucontext) {
305 ret = -EINVAL;
306 goto err;
307 }
308
309 INIT_UDATA(&udata, buf + sizeof cmd,
310 (unsigned long) cmd.response + sizeof resp,
311 in_len - sizeof cmd, out_len - sizeof resp);
312
313 ucontext = ibdev->alloc_ucontext(ibdev, &udata);
314 if (IS_ERR(ucontext)) {
315 ret = PTR_ERR(ucontext);
316 goto err;
317 }
318
319 ucontext->device = ibdev;
320 INIT_LIST_HEAD(&ucontext->pd_list);
321 INIT_LIST_HEAD(&ucontext->mr_list);
322 INIT_LIST_HEAD(&ucontext->mw_list);
323 INIT_LIST_HEAD(&ucontext->cq_list);
324 INIT_LIST_HEAD(&ucontext->qp_list);
325 INIT_LIST_HEAD(&ucontext->srq_list);
326 INIT_LIST_HEAD(&ucontext->ah_list);
327 INIT_LIST_HEAD(&ucontext->xrcd_list);
328 ucontext->closing = 0;
329
330 resp.num_comp_vectors = file->device->num_comp_vectors;
331
332 ret = get_unused_fd();
333 if (ret < 0)
334 goto err_free;
335 resp.async_fd = ret;
336
337 filp = ib_uverbs_alloc_event_file(file, 1);
338 if (IS_ERR(filp)) {
339 ret = PTR_ERR(filp);
340 goto err_fd;
341 }
342
343 if (copy_to_user((void __user *) (unsigned long) cmd.response,
344 &resp, sizeof resp)) {
345 ret = -EFAULT;
346 goto err_file;
347 }
348
349 file->async_file = filp->private_data;
350
351 INIT_IB_EVENT_HANDLER(&file->event_handler, file->device->ib_dev,
352 ib_uverbs_event_handler);
353 ret = ib_register_event_handler(&file->event_handler);
354 if (ret)
355 goto err_file;
356
357 kref_get(&file->async_file->ref);
358 kref_get(&file->ref);
359 file->ucontext = ucontext;
360
361 fd_install(resp.async_fd, filp);
362
363 mutex_unlock(&file->mutex);
364
365 return in_len;
366
367 err_file:
368 fput(filp);
369
370 err_fd:
371 put_unused_fd(resp.async_fd);
372
373 err_free:
374 ibdev->dealloc_ucontext(ucontext);
375
376 err:
377 mutex_unlock(&file->mutex);
378 return ret;
379 }
380
381 ssize_t ib_uverbs_query_device(struct ib_uverbs_file *file,
382 const char __user *buf,
383 int in_len, int out_len)
384 {
385 struct ib_uverbs_query_device cmd;
386 struct ib_uverbs_query_device_resp resp;
387 struct ib_device_attr attr;
388 int ret;
389
390 if (out_len < sizeof resp)
391 return -ENOSPC;
392
393 if (copy_from_user(&cmd, buf, sizeof cmd))
394 return -EFAULT;
395
396 ret = ib_query_device(file->device->ib_dev, &attr);
397 if (ret)
398 return ret;
399
400 memset(&resp, 0, sizeof resp);
401
402 resp.fw_ver = attr.fw_ver;
403 resp.node_guid = file->device->ib_dev->node_guid;
404 resp.sys_image_guid = attr.sys_image_guid;
405 resp.max_mr_size = attr.max_mr_size;
406 resp.page_size_cap = attr.page_size_cap;
407 resp.vendor_id = attr.vendor_id;
408 resp.vendor_part_id = attr.vendor_part_id;
409 resp.hw_ver = attr.hw_ver;
410 resp.max_qp = attr.max_qp;
411 resp.max_qp_wr = attr.max_qp_wr;
412 resp.device_cap_flags = attr.device_cap_flags;
413 resp.max_sge = attr.max_sge;
414 resp.max_sge_rd = attr.max_sge_rd;
415 resp.max_cq = attr.max_cq;
416 resp.max_cqe = attr.max_cqe;
417 resp.max_mr = attr.max_mr;
418 resp.max_pd = attr.max_pd;
419 resp.max_qp_rd_atom = attr.max_qp_rd_atom;
420 resp.max_ee_rd_atom = attr.max_ee_rd_atom;
421 resp.max_res_rd_atom = attr.max_res_rd_atom;
422 resp.max_qp_init_rd_atom = attr.max_qp_init_rd_atom;
423 resp.max_ee_init_rd_atom = attr.max_ee_init_rd_atom;
424 resp.atomic_cap = attr.atomic_cap;
425 resp.max_ee = attr.max_ee;
426 resp.max_rdd = attr.max_rdd;
427 resp.max_mw = attr.max_mw;
428 resp.max_raw_ipv6_qp = attr.max_raw_ipv6_qp;
429 resp.max_raw_ethy_qp = attr.max_raw_ethy_qp;
430 resp.max_mcast_grp = attr.max_mcast_grp;
431 resp.max_mcast_qp_attach = attr.max_mcast_qp_attach;
432 resp.max_total_mcast_qp_attach = attr.max_total_mcast_qp_attach;
433 resp.max_ah = attr.max_ah;
434 resp.max_fmr = attr.max_fmr;
435 resp.max_map_per_fmr = attr.max_map_per_fmr;
436 resp.max_srq = attr.max_srq;
437 resp.max_srq_wr = attr.max_srq_wr;
438 resp.max_srq_sge = attr.max_srq_sge;
439 resp.max_pkeys = attr.max_pkeys;
440 resp.local_ca_ack_delay = attr.local_ca_ack_delay;
441 resp.phys_port_cnt = file->device->ib_dev->phys_port_cnt;
442
443 if (copy_to_user((void __user *) (unsigned long) cmd.response,
444 &resp, sizeof resp))
445 return -EFAULT;
446
447 return in_len;
448 }
449
450 ssize_t ib_uverbs_query_port(struct ib_uverbs_file *file,
451 const char __user *buf,
452 int in_len, int out_len)
453 {
454 struct ib_uverbs_query_port cmd;
455 struct ib_uverbs_query_port_resp resp;
456 struct ib_port_attr attr;
457 int ret;
458
459 if (out_len < sizeof resp)
460 return -ENOSPC;
461
462 if (copy_from_user(&cmd, buf, sizeof cmd))
463 return -EFAULT;
464
465 ret = ib_query_port(file->device->ib_dev, cmd.port_num, &attr);
466 if (ret)
467 return ret;
468
469 memset(&resp, 0, sizeof resp);
470
471 resp.state = attr.state;
472 resp.max_mtu = attr.max_mtu;
473 resp.active_mtu = attr.active_mtu;
474 resp.gid_tbl_len = attr.gid_tbl_len;
475 resp.port_cap_flags = attr.port_cap_flags;
476 resp.max_msg_sz = attr.max_msg_sz;
477 resp.bad_pkey_cntr = attr.bad_pkey_cntr;
478 resp.qkey_viol_cntr = attr.qkey_viol_cntr;
479 resp.pkey_tbl_len = attr.pkey_tbl_len;
480 resp.lid = attr.lid;
481 resp.sm_lid = attr.sm_lid;
482 resp.lmc = attr.lmc;
483 resp.max_vl_num = attr.max_vl_num;
484 resp.sm_sl = attr.sm_sl;
485 resp.subnet_timeout = attr.subnet_timeout;
486 resp.init_type_reply = attr.init_type_reply;
487 resp.active_width = attr.active_width;
488 resp.active_speed = attr.active_speed;
489 resp.phys_state = attr.phys_state;
490 resp.link_layer = rdma_port_get_link_layer(file->device->ib_dev,
491 cmd.port_num);
492
493 if (copy_to_user((void __user *) (unsigned long) cmd.response,
494 &resp, sizeof resp))
495 return -EFAULT;
496
497 return in_len;
498 }
499
500 ssize_t ib_uverbs_alloc_pd(struct ib_uverbs_file *file,
501 const char __user *buf,
502 int in_len, int out_len)
503 {
504 struct ib_uverbs_alloc_pd cmd;
505 struct ib_uverbs_alloc_pd_resp resp;
506 struct ib_udata udata;
507 struct ib_uobject *uobj;
508 struct ib_pd *pd;
509 int ret;
510
511 if (out_len < sizeof resp)
512 return -ENOSPC;
513
514 if (copy_from_user(&cmd, buf, sizeof cmd))
515 return -EFAULT;
516
517 INIT_UDATA(&udata, buf + sizeof cmd,
518 (unsigned long) cmd.response + sizeof resp,
519 in_len - sizeof cmd, out_len - sizeof resp);
520
521 uobj = kmalloc(sizeof *uobj, GFP_KERNEL);
522 if (!uobj)
523 return -ENOMEM;
524
525 init_uobj(uobj, 0, file->ucontext, &pd_lock_key);
526 down_write(&uobj->mutex);
527
528 pd = file->device->ib_dev->alloc_pd(file->device->ib_dev,
529 file->ucontext, &udata);
530 if (IS_ERR(pd)) {
531 ret = PTR_ERR(pd);
532 goto err;
533 }
534
535 pd->device = file->device->ib_dev;
536 pd->uobject = uobj;
537 atomic_set(&pd->usecnt, 0);
538
539 uobj->object = pd;
540 ret = idr_add_uobj(&ib_uverbs_pd_idr, uobj);
541 if (ret)
542 goto err_idr;
543
544 memset(&resp, 0, sizeof resp);
545 resp.pd_handle = uobj->id;
546
547 if (copy_to_user((void __user *) (unsigned long) cmd.response,
548 &resp, sizeof resp)) {
549 ret = -EFAULT;
550 goto err_copy;
551 }
552
553 mutex_lock(&file->mutex);
554 list_add_tail(&uobj->list, &file->ucontext->pd_list);
555 mutex_unlock(&file->mutex);
556
557 uobj->live = 1;
558
559 up_write(&uobj->mutex);
560
561 return in_len;
562
563 err_copy:
564 idr_remove_uobj(&ib_uverbs_pd_idr, uobj);
565
566 err_idr:
567 ib_dealloc_pd(pd);
568
569 err:
570 put_uobj_write(uobj);
571 return ret;
572 }
573
574 ssize_t ib_uverbs_dealloc_pd(struct ib_uverbs_file *file,
575 const char __user *buf,
576 int in_len, int out_len)
577 {
578 struct ib_uverbs_dealloc_pd cmd;
579 struct ib_uobject *uobj;
580 int ret;
581
582 if (copy_from_user(&cmd, buf, sizeof cmd))
583 return -EFAULT;
584
585 uobj = idr_write_uobj(&ib_uverbs_pd_idr, cmd.pd_handle, file->ucontext);
586 if (!uobj)
587 return -EINVAL;
588
589 ret = ib_dealloc_pd(uobj->object);
590 if (!ret)
591 uobj->live = 0;
592
593 put_uobj_write(uobj);
594
595 if (ret)
596 return ret;
597
598 idr_remove_uobj(&ib_uverbs_pd_idr, uobj);
599
600 mutex_lock(&file->mutex);
601 list_del(&uobj->list);
602 mutex_unlock(&file->mutex);
603
604 put_uobj(uobj);
605
606 return in_len;
607 }
608
609 struct xrcd_table_entry {
610 struct rb_node node;
611 struct ib_xrcd *xrcd;
612 struct inode *inode;
613 };
614
615 static int xrcd_table_insert(struct ib_uverbs_device *dev,
616 struct inode *inode,
617 struct ib_xrcd *xrcd)
618 {
619 struct xrcd_table_entry *entry, *scan;
620 struct rb_node **p = &dev->xrcd_tree.rb_node;
621 struct rb_node *parent = NULL;
622
623 entry = kmalloc(sizeof *entry, GFP_KERNEL);
624 if (!entry)
625 return -ENOMEM;
626
627 entry->xrcd = xrcd;
628 entry->inode = inode;
629
630 while (*p) {
631 parent = *p;
632 scan = rb_entry(parent, struct xrcd_table_entry, node);
633
634 if (inode < scan->inode) {
635 p = &(*p)->rb_left;
636 } else if (inode > scan->inode) {
637 p = &(*p)->rb_right;
638 } else {
639 kfree(entry);
640 return -EEXIST;
641 }
642 }
643
644 rb_link_node(&entry->node, parent, p);
645 rb_insert_color(&entry->node, &dev->xrcd_tree);
646 igrab(inode);
647 return 0;
648 }
649
650 static struct xrcd_table_entry *xrcd_table_search(struct ib_uverbs_device *dev,
651 struct inode *inode)
652 {
653 struct xrcd_table_entry *entry;
654 struct rb_node *p = dev->xrcd_tree.rb_node;
655
656 while (p) {
657 entry = rb_entry(p, struct xrcd_table_entry, node);
658
659 if (inode < entry->inode)
660 p = p->rb_left;
661 else if (inode > entry->inode)
662 p = p->rb_right;
663 else
664 return entry;
665 }
666
667 return NULL;
668 }
669
670 static struct ib_xrcd *find_xrcd(struct ib_uverbs_device *dev, struct inode *inode)
671 {
672 struct xrcd_table_entry *entry;
673
674 entry = xrcd_table_search(dev, inode);
675 if (!entry)
676 return NULL;
677
678 return entry->xrcd;
679 }
680
681 static void xrcd_table_delete(struct ib_uverbs_device *dev,
682 struct inode *inode)
683 {
684 struct xrcd_table_entry *entry;
685
686 entry = xrcd_table_search(dev, inode);
687 if (entry) {
688 iput(inode);
689 rb_erase(&entry->node, &dev->xrcd_tree);
690 kfree(entry);
691 }
692 }
693
694 ssize_t ib_uverbs_open_xrcd(struct ib_uverbs_file *file,
695 const char __user *buf, int in_len,
696 int out_len)
697 {
698 struct ib_uverbs_open_xrcd cmd;
699 struct ib_uverbs_open_xrcd_resp resp;
700 struct ib_udata udata;
701 struct ib_uxrcd_object *obj;
702 struct ib_xrcd *xrcd = NULL;
703 struct file *f = NULL;
704 struct inode *inode = NULL;
705 int ret = 0;
706 int new_xrcd = 0;
707
708 if (out_len < sizeof resp)
709 return -ENOSPC;
710
711 if (copy_from_user(&cmd, buf, sizeof cmd))
712 return -EFAULT;
713
714 INIT_UDATA(&udata, buf + sizeof cmd,
715 (unsigned long) cmd.response + sizeof resp,
716 in_len - sizeof cmd, out_len - sizeof resp);
717
718 mutex_lock(&file->device->xrcd_tree_mutex);
719
720 if (cmd.fd != -1) {
721 /* search for file descriptor */
722 f = fget(cmd.fd);
723 if (!f) {
724 ret = -EBADF;
725 goto err_tree_mutex_unlock;
726 }
727
728 inode = f->f_dentry->d_inode;
729 if (!inode) {
730 ret = -EBADF;
731 goto err_tree_mutex_unlock;
732 }
733
734 xrcd = find_xrcd(file->device, inode);
735 if (!xrcd && !(cmd.oflags & O_CREAT)) {
736 /* no file descriptor. Need CREATE flag */
737 ret = -EAGAIN;
738 goto err_tree_mutex_unlock;
739 }
740
741 if (xrcd && cmd.oflags & O_EXCL) {
742 ret = -EINVAL;
743 goto err_tree_mutex_unlock;
744 }
745 }
746
747 obj = kmalloc(sizeof *obj, GFP_KERNEL);
748 if (!obj) {
749 ret = -ENOMEM;
750 goto err_tree_mutex_unlock;
751 }
752
753 init_uobj(&obj->uobject, 0, file->ucontext, &xrcd_lock_key);
754
755 down_write(&obj->uobject.mutex);
756
757 if (!xrcd) {
758 xrcd = file->device->ib_dev->alloc_xrcd(file->device->ib_dev,
759 file->ucontext, &udata);
760 if (IS_ERR(xrcd)) {
761 ret = PTR_ERR(xrcd);
762 goto err;
763 }
764
765 xrcd->inode = inode;
766 xrcd->device = file->device->ib_dev;
767 atomic_set(&xrcd->usecnt, 0);
768 mutex_init(&xrcd->tgt_qp_mutex);
769 INIT_LIST_HEAD(&xrcd->tgt_qp_list);
770 new_xrcd = 1;
771 }
772
773 atomic_set(&obj->refcnt, 0);
774 obj->uobject.object = xrcd;
775 ret = idr_add_uobj(&ib_uverbs_xrcd_idr, &obj->uobject);
776 if (ret)
777 goto err_idr;
778
779 memset(&resp, 0, sizeof resp);
780 resp.xrcd_handle = obj->uobject.id;
781
782 if (inode) {
783 if (new_xrcd) {
784 /* create new inode/xrcd table entry */
785 ret = xrcd_table_insert(file->device, inode, xrcd);
786 if (ret)
787 goto err_insert_xrcd;
788 }
789 atomic_inc(&xrcd->usecnt);
790 }
791
792 if (copy_to_user((void __user *) (unsigned long) cmd.response,
793 &resp, sizeof resp)) {
794 ret = -EFAULT;
795 goto err_copy;
796 }
797
798 if (f)
799 fput(f);
800
801 mutex_lock(&file->mutex);
802 list_add_tail(&obj->uobject.list, &file->ucontext->xrcd_list);
803 mutex_unlock(&file->mutex);
804
805 obj->uobject.live = 1;
806 up_write(&obj->uobject.mutex);
807
808 mutex_unlock(&file->device->xrcd_tree_mutex);
809 return in_len;
810
811 err_copy:
812 if (inode) {
813 if (new_xrcd)
814 xrcd_table_delete(file->device, inode);
815 atomic_dec(&xrcd->usecnt);
816 }
817
818 err_insert_xrcd:
819 idr_remove_uobj(&ib_uverbs_xrcd_idr, &obj->uobject);
820
821 err_idr:
822 ib_dealloc_xrcd(xrcd);
823
824 err:
825 put_uobj_write(&obj->uobject);
826
827 err_tree_mutex_unlock:
828 if (f)
829 fput(f);
830
831 mutex_unlock(&file->device->xrcd_tree_mutex);
832
833 return ret;
834 }
835
836 ssize_t ib_uverbs_close_xrcd(struct ib_uverbs_file *file,
837 const char __user *buf, int in_len,
838 int out_len)
839 {
840 struct ib_uverbs_close_xrcd cmd;
841 struct ib_uobject *uobj;
842 struct ib_xrcd *xrcd = NULL;
843 struct inode *inode = NULL;
844 struct ib_uxrcd_object *obj;
845 int live;
846 int ret = 0;
847
848 if (copy_from_user(&cmd, buf, sizeof cmd))
849 return -EFAULT;
850
851 mutex_lock(&file->device->xrcd_tree_mutex);
852 uobj = idr_write_uobj(&ib_uverbs_xrcd_idr, cmd.xrcd_handle, file->ucontext);
853 if (!uobj) {
854 ret = -EINVAL;
855 goto out;
856 }
857
858 xrcd = uobj->object;
859 inode = xrcd->inode;
860 obj = container_of(uobj, struct ib_uxrcd_object, uobject);
861 if (atomic_read(&obj->refcnt)) {
862 put_uobj_write(uobj);
863 ret = -EBUSY;
864 goto out;
865 }
866
867 if (!inode || atomic_dec_and_test(&xrcd->usecnt)) {
868 ret = ib_dealloc_xrcd(uobj->object);
869 if (!ret)
870 uobj->live = 0;
871 }
872
873 live = uobj->live;
874 if (inode && ret)
875 atomic_inc(&xrcd->usecnt);
876
877 put_uobj_write(uobj);
878
879 if (ret)
880 goto out;
881
882 if (inode && !live)
883 xrcd_table_delete(file->device, inode);
884
885 idr_remove_uobj(&ib_uverbs_xrcd_idr, uobj);
886 mutex_lock(&file->mutex);
887 list_del(&uobj->list);
888 mutex_unlock(&file->mutex);
889
890 put_uobj(uobj);
891 ret = in_len;
892
893 out:
894 mutex_unlock(&file->device->xrcd_tree_mutex);
895 return ret;
896 }
897
898 void ib_uverbs_dealloc_xrcd(struct ib_uverbs_device *dev,
899 struct ib_xrcd *xrcd)
900 {
901 struct inode *inode;
902
903 inode = xrcd->inode;
904 if (inode && !atomic_dec_and_test(&xrcd->usecnt))
905 return;
906
907 ib_dealloc_xrcd(xrcd);
908
909 if (inode)
910 xrcd_table_delete(dev, inode);
911 }
912
913 ssize_t ib_uverbs_reg_mr(struct ib_uverbs_file *file,
914 const char __user *buf, int in_len,
915 int out_len)
916 {
917 struct ib_uverbs_reg_mr cmd;
918 struct ib_uverbs_reg_mr_resp resp;
919 struct ib_udata udata;
920 struct ib_uobject *uobj;
921 struct ib_pd *pd;
922 struct ib_mr *mr;
923 int ret;
924
925 if (out_len < sizeof resp)
926 return -ENOSPC;
927
928 if (copy_from_user(&cmd, buf, sizeof cmd))
929 return -EFAULT;
930
931 INIT_UDATA(&udata, buf + sizeof cmd,
932 (unsigned long) cmd.response + sizeof resp,
933 in_len - sizeof cmd, out_len - sizeof resp);
934
935 if ((cmd.start & ~PAGE_MASK) != (cmd.hca_va & ~PAGE_MASK))
936 return -EINVAL;
937
938 /*
939 * Local write permission is required if remote write or
940 * remote atomic permission is also requested.
941 */
942 if (cmd.access_flags & (IB_ACCESS_REMOTE_ATOMIC | IB_ACCESS_REMOTE_WRITE) &&
943 !(cmd.access_flags & IB_ACCESS_LOCAL_WRITE))
944 return -EINVAL;
945
946 uobj = kmalloc(sizeof *uobj, GFP_KERNEL);
947 if (!uobj)
948 return -ENOMEM;
949
950 init_uobj(uobj, 0, file->ucontext, &mr_lock_key);
951 down_write(&uobj->mutex);
952
953 pd = idr_read_pd(cmd.pd_handle, file->ucontext);
954 if (!pd) {
955 ret = -EINVAL;
956 goto err_free;
957 }
958
959 mr = pd->device->reg_user_mr(pd, cmd.start, cmd.length, cmd.hca_va,
960 cmd.access_flags, &udata);
961 if (IS_ERR(mr)) {
962 ret = PTR_ERR(mr);
963 goto err_put;
964 }
965
966 mr->device = pd->device;
967 mr->pd = pd;
968 mr->uobject = uobj;
969 atomic_inc(&pd->usecnt);
970 atomic_set(&mr->usecnt, 0);
971
972 uobj->object = mr;
973 ret = idr_add_uobj(&ib_uverbs_mr_idr, uobj);
974 if (ret)
975 goto err_unreg;
976
977 memset(&resp, 0, sizeof resp);
978 resp.lkey = mr->lkey;
979 resp.rkey = mr->rkey;
980 resp.mr_handle = uobj->id;
981
982 if (copy_to_user((void __user *) (unsigned long) cmd.response,
983 &resp, sizeof resp)) {
984 ret = -EFAULT;
985 goto err_copy;
986 }
987
988 put_pd_read(pd);
989
990 mutex_lock(&file->mutex);
991 list_add_tail(&uobj->list, &file->ucontext->mr_list);
992 mutex_unlock(&file->mutex);
993
994 uobj->live = 1;
995
996 up_write(&uobj->mutex);
997
998 return in_len;
999
1000 err_copy:
1001 idr_remove_uobj(&ib_uverbs_mr_idr, uobj);
1002
1003 err_unreg:
1004 ib_dereg_mr(mr);
1005
1006 err_put:
1007 put_pd_read(pd);
1008
1009 err_free:
1010 put_uobj_write(uobj);
1011 return ret;
1012 }
1013
1014 ssize_t ib_uverbs_dereg_mr(struct ib_uverbs_file *file,
1015 const char __user *buf, int in_len,
1016 int out_len)
1017 {
1018 struct ib_uverbs_dereg_mr cmd;
1019 struct ib_mr *mr;
1020 struct ib_uobject *uobj;
1021 int ret = -EINVAL;
1022
1023 if (copy_from_user(&cmd, buf, sizeof cmd))
1024 return -EFAULT;
1025
1026 uobj = idr_write_uobj(&ib_uverbs_mr_idr, cmd.mr_handle, file->ucontext);
1027 if (!uobj)
1028 return -EINVAL;
1029
1030 mr = uobj->object;
1031
1032 ret = ib_dereg_mr(mr);
1033 if (!ret)
1034 uobj->live = 0;
1035
1036 put_uobj_write(uobj);
1037
1038 if (ret)
1039 return ret;
1040
1041 idr_remove_uobj(&ib_uverbs_mr_idr, uobj);
1042
1043 mutex_lock(&file->mutex);
1044 list_del(&uobj->list);
1045 mutex_unlock(&file->mutex);
1046
1047 put_uobj(uobj);
1048
1049 return in_len;
1050 }
1051
1052 ssize_t ib_uverbs_create_comp_channel(struct ib_uverbs_file *file,
1053 const char __user *buf, int in_len,
1054 int out_len)
1055 {
1056 struct ib_uverbs_create_comp_channel cmd;
1057 struct ib_uverbs_create_comp_channel_resp resp;
1058 struct file *filp;
1059 int ret;
1060
1061 if (out_len < sizeof resp)
1062 return -ENOSPC;
1063
1064 if (copy_from_user(&cmd, buf, sizeof cmd))
1065 return -EFAULT;
1066
1067 ret = get_unused_fd();
1068 if (ret < 0)
1069 return ret;
1070 resp.fd = ret;
1071
1072 filp = ib_uverbs_alloc_event_file(file, 0);
1073 if (IS_ERR(filp)) {
1074 put_unused_fd(resp.fd);
1075 return PTR_ERR(filp);
1076 }
1077
1078 if (copy_to_user((void __user *) (unsigned long) cmd.response,
1079 &resp, sizeof resp)) {
1080 put_unused_fd(resp.fd);
1081 fput(filp);
1082 return -EFAULT;
1083 }
1084
1085 fd_install(resp.fd, filp);
1086 return in_len;
1087 }
1088
1089 ssize_t ib_uverbs_create_cq(struct ib_uverbs_file *file,
1090 const char __user *buf, int in_len,
1091 int out_len)
1092 {
1093 struct ib_uverbs_create_cq cmd;
1094 struct ib_uverbs_create_cq_resp resp;
1095 struct ib_udata udata;
1096 struct ib_ucq_object *obj;
1097 struct ib_uverbs_event_file *ev_file = NULL;
1098 struct ib_cq *cq;
1099 int ret;
1100
1101 if (out_len < sizeof resp)
1102 return -ENOSPC;
1103
1104 if (copy_from_user(&cmd, buf, sizeof cmd))
1105 return -EFAULT;
1106
1107 INIT_UDATA(&udata, buf + sizeof cmd,
1108 (unsigned long) cmd.response + sizeof resp,
1109 in_len - sizeof cmd, out_len - sizeof resp);
1110
1111 if (cmd.comp_vector >= file->device->num_comp_vectors)
1112 return -EINVAL;
1113
1114 obj = kmalloc(sizeof *obj, GFP_KERNEL);
1115 if (!obj)
1116 return -ENOMEM;
1117
1118 init_uobj(&obj->uobject, cmd.user_handle, file->ucontext, &cq_lock_key);
1119 down_write(&obj->uobject.mutex);
1120
1121 if (cmd.comp_channel >= 0) {
1122 ev_file = ib_uverbs_lookup_comp_file(cmd.comp_channel);
1123 if (!ev_file) {
1124 ret = -EINVAL;
1125 goto err;
1126 }
1127 }
1128
1129 obj->uverbs_file = file;
1130 obj->comp_events_reported = 0;
1131 obj->async_events_reported = 0;
1132 INIT_LIST_HEAD(&obj->comp_list);
1133 INIT_LIST_HEAD(&obj->async_list);
1134
1135 cq = file->device->ib_dev->create_cq(file->device->ib_dev, cmd.cqe,
1136 cmd.comp_vector,
1137 file->ucontext, &udata);
1138 if (IS_ERR(cq)) {
1139 ret = PTR_ERR(cq);
1140 goto err_file;
1141 }
1142
1143 cq->device = file->device->ib_dev;
1144 cq->uobject = &obj->uobject;
1145 cq->comp_handler = ib_uverbs_comp_handler;
1146 cq->event_handler = ib_uverbs_cq_event_handler;
1147 cq->cq_context = ev_file;
1148 atomic_set(&cq->usecnt, 0);
1149
1150 obj->uobject.object = cq;
1151 ret = idr_add_uobj(&ib_uverbs_cq_idr, &obj->uobject);
1152 if (ret)
1153 goto err_free;
1154
1155 memset(&resp, 0, sizeof resp);
1156 resp.cq_handle = obj->uobject.id;
1157 resp.cqe = cq->cqe;
1158
1159 if (copy_to_user((void __user *) (unsigned long) cmd.response,
1160 &resp, sizeof resp)) {
1161 ret = -EFAULT;
1162 goto err_copy;
1163 }
1164
1165 mutex_lock(&file->mutex);
1166 list_add_tail(&obj->uobject.list, &file->ucontext->cq_list);
1167 mutex_unlock(&file->mutex);
1168
1169 obj->uobject.live = 1;
1170
1171 up_write(&obj->uobject.mutex);
1172
1173 return in_len;
1174
1175 err_copy:
1176 idr_remove_uobj(&ib_uverbs_cq_idr, &obj->uobject);
1177
1178 err_free:
1179 ib_destroy_cq(cq);
1180
1181 err_file:
1182 if (ev_file)
1183 ib_uverbs_release_ucq(file, ev_file, obj);
1184
1185 err:
1186 put_uobj_write(&obj->uobject);
1187 return ret;
1188 }
1189
1190 ssize_t ib_uverbs_resize_cq(struct ib_uverbs_file *file,
1191 const char __user *buf, int in_len,
1192 int out_len)
1193 {
1194 struct ib_uverbs_resize_cq cmd;
1195 struct ib_uverbs_resize_cq_resp resp;
1196 struct ib_udata udata;
1197 struct ib_cq *cq;
1198 int ret = -EINVAL;
1199
1200 if (copy_from_user(&cmd, buf, sizeof cmd))
1201 return -EFAULT;
1202
1203 INIT_UDATA(&udata, buf + sizeof cmd,
1204 (unsigned long) cmd.response + sizeof resp,
1205 in_len - sizeof cmd, out_len - sizeof resp);
1206
1207 cq = idr_read_cq(cmd.cq_handle, file->ucontext, 0);
1208 if (!cq)
1209 return -EINVAL;
1210
1211 ret = cq->device->resize_cq(cq, cmd.cqe, &udata);
1212 if (ret)
1213 goto out;
1214
1215 resp.cqe = cq->cqe;
1216
1217 if (copy_to_user((void __user *) (unsigned long) cmd.response,
1218 &resp, sizeof resp.cqe))
1219 ret = -EFAULT;
1220
1221 out:
1222 put_cq_read(cq);
1223
1224 return ret ? ret : in_len;
1225 }
1226
1227 static int copy_wc_to_user(void __user *dest, struct ib_wc *wc)
1228 {
1229 struct ib_uverbs_wc tmp;
1230
1231 tmp.wr_id = wc->wr_id;
1232 tmp.status = wc->status;
1233 tmp.opcode = wc->opcode;
1234 tmp.vendor_err = wc->vendor_err;
1235 tmp.byte_len = wc->byte_len;
1236 tmp.ex.imm_data = (__u32 __force) wc->ex.imm_data;
1237 tmp.qp_num = wc->qp->qp_num;
1238 tmp.src_qp = wc->src_qp;
1239 tmp.wc_flags = wc->wc_flags;
1240 tmp.pkey_index = wc->pkey_index;
1241 tmp.slid = wc->slid;
1242 tmp.sl = wc->sl;
1243 tmp.dlid_path_bits = wc->dlid_path_bits;
1244 tmp.port_num = wc->port_num;
1245 tmp.reserved = 0;
1246
1247 if (copy_to_user(dest, &tmp, sizeof tmp))
1248 return -EFAULT;
1249
1250 return 0;
1251 }
1252
1253 ssize_t ib_uverbs_poll_cq(struct ib_uverbs_file *file,
1254 const char __user *buf, int in_len,
1255 int out_len)
1256 {
1257 struct ib_uverbs_poll_cq cmd;
1258 struct ib_uverbs_poll_cq_resp resp;
1259 u8 __user *header_ptr;
1260 u8 __user *data_ptr;
1261 struct ib_cq *cq;
1262 struct ib_wc wc;
1263 int ret;
1264
1265 if (copy_from_user(&cmd, buf, sizeof cmd))
1266 return -EFAULT;
1267
1268 cq = idr_read_cq(cmd.cq_handle, file->ucontext, 0);
1269 if (!cq)
1270 return -EINVAL;
1271
1272 /* we copy a struct ib_uverbs_poll_cq_resp to user space */
1273 header_ptr = (void __user *)(unsigned long) cmd.response;
1274 data_ptr = header_ptr + sizeof resp;
1275
1276 memset(&resp, 0, sizeof resp);
1277 while (resp.count < cmd.ne) {
1278 ret = ib_poll_cq(cq, 1, &wc);
1279 if (ret < 0)
1280 goto out_put;
1281 if (!ret)
1282 break;
1283
1284 ret = copy_wc_to_user(data_ptr, &wc);
1285 if (ret)
1286 goto out_put;
1287
1288 data_ptr += sizeof(struct ib_uverbs_wc);
1289 ++resp.count;
1290 }
1291
1292 if (copy_to_user(header_ptr, &resp, sizeof resp)) {
1293 ret = -EFAULT;
1294 goto out_put;
1295 }
1296
1297 ret = in_len;
1298
1299 out_put:
1300 put_cq_read(cq);
1301 return ret;
1302 }
1303
1304 ssize_t ib_uverbs_req_notify_cq(struct ib_uverbs_file *file,
1305 const char __user *buf, int in_len,
1306 int out_len)
1307 {
1308 struct ib_uverbs_req_notify_cq cmd;
1309 struct ib_cq *cq;
1310
1311 if (copy_from_user(&cmd, buf, sizeof cmd))
1312 return -EFAULT;
1313
1314 cq = idr_read_cq(cmd.cq_handle, file->ucontext, 0);
1315 if (!cq)
1316 return -EINVAL;
1317
1318 ib_req_notify_cq(cq, cmd.solicited_only ?
1319 IB_CQ_SOLICITED : IB_CQ_NEXT_COMP);
1320
1321 put_cq_read(cq);
1322
1323 return in_len;
1324 }
1325
1326 ssize_t ib_uverbs_destroy_cq(struct ib_uverbs_file *file,
1327 const char __user *buf, int in_len,
1328 int out_len)
1329 {
1330 struct ib_uverbs_destroy_cq cmd;
1331 struct ib_uverbs_destroy_cq_resp resp;
1332 struct ib_uobject *uobj;
1333 struct ib_cq *cq;
1334 struct ib_ucq_object *obj;
1335 struct ib_uverbs_event_file *ev_file;
1336 int ret = -EINVAL;
1337
1338 if (copy_from_user(&cmd, buf, sizeof cmd))
1339 return -EFAULT;
1340
1341 uobj = idr_write_uobj(&ib_uverbs_cq_idr, cmd.cq_handle, file->ucontext);
1342 if (!uobj)
1343 return -EINVAL;
1344 cq = uobj->object;
1345 ev_file = cq->cq_context;
1346 obj = container_of(cq->uobject, struct ib_ucq_object, uobject);
1347
1348 ret = ib_destroy_cq(cq);
1349 if (!ret)
1350 uobj->live = 0;
1351
1352 put_uobj_write(uobj);
1353
1354 if (ret)
1355 return ret;
1356
1357 idr_remove_uobj(&ib_uverbs_cq_idr, uobj);
1358
1359 mutex_lock(&file->mutex);
1360 list_del(&uobj->list);
1361 mutex_unlock(&file->mutex);
1362
1363 ib_uverbs_release_ucq(file, ev_file, obj);
1364
1365 memset(&resp, 0, sizeof resp);
1366 resp.comp_events_reported = obj->comp_events_reported;
1367 resp.async_events_reported = obj->async_events_reported;
1368
1369 put_uobj(uobj);
1370
1371 if (copy_to_user((void __user *) (unsigned long) cmd.response,
1372 &resp, sizeof resp))
1373 return -EFAULT;
1374
1375 return in_len;
1376 }
1377
1378 ssize_t ib_uverbs_create_qp(struct ib_uverbs_file *file,
1379 const char __user *buf, int in_len,
1380 int out_len)
1381 {
1382 struct ib_uverbs_create_qp cmd;
1383 struct ib_uverbs_create_qp_resp resp;
1384 struct ib_udata udata;
1385 struct ib_uqp_object *obj;
1386 struct ib_device *device;
1387 struct ib_pd *pd = NULL;
1388 struct ib_xrcd *xrcd = NULL;
1389 struct ib_uobject *uninitialized_var(xrcd_uobj);
1390 struct ib_cq *scq = NULL, *rcq = NULL;
1391 struct ib_srq *srq = NULL;
1392 struct ib_qp *qp;
1393 struct ib_qp_init_attr attr;
1394 int ret;
1395
1396 if (out_len < sizeof resp)
1397 return -ENOSPC;
1398
1399 if (copy_from_user(&cmd, buf, sizeof cmd))
1400 return -EFAULT;
1401
1402 INIT_UDATA(&udata, buf + sizeof cmd,
1403 (unsigned long) cmd.response + sizeof resp,
1404 in_len - sizeof cmd, out_len - sizeof resp);
1405
1406 obj = kmalloc(sizeof *obj, GFP_KERNEL);
1407 if (!obj)
1408 return -ENOMEM;
1409
1410 init_uobj(&obj->uevent.uobject, cmd.user_handle, file->ucontext, &qp_lock_key);
1411 down_write(&obj->uevent.uobject.mutex);
1412
1413 if (cmd.qp_type == IB_QPT_XRC_TGT) {
1414 xrcd = idr_read_xrcd(cmd.pd_handle, file->ucontext, &xrcd_uobj);
1415 if (!xrcd) {
1416 ret = -EINVAL;
1417 goto err_put;
1418 }
1419 device = xrcd->device;
1420 } else {
1421 pd = idr_read_pd(cmd.pd_handle, file->ucontext);
1422 scq = idr_read_cq(cmd.send_cq_handle, file->ucontext, 0);
1423 if (!pd || !scq) {
1424 ret = -EINVAL;
1425 goto err_put;
1426 }
1427
1428 if (cmd.qp_type == IB_QPT_XRC_INI) {
1429 cmd.max_recv_wr = cmd.max_recv_sge = 0;
1430 } else {
1431 if (cmd.is_srq) {
1432 srq = idr_read_srq(cmd.srq_handle, file->ucontext);
1433 if (!srq || srq->srq_type != IB_SRQT_BASIC) {
1434 ret = -EINVAL;
1435 goto err_put;
1436 }
1437 }
1438 rcq = (cmd.recv_cq_handle == cmd.send_cq_handle) ?
1439 scq : idr_read_cq(cmd.recv_cq_handle, file->ucontext, 1);
1440 if (!rcq) {
1441 ret = -EINVAL;
1442 goto err_put;
1443 }
1444 }
1445 device = pd->device;
1446 }
1447
1448 attr.event_handler = ib_uverbs_qp_event_handler;
1449 attr.qp_context = file;
1450 attr.send_cq = scq;
1451 attr.recv_cq = rcq;
1452 attr.srq = srq;
1453 attr.xrcd = xrcd;
1454 attr.sq_sig_type = cmd.sq_sig_all ? IB_SIGNAL_ALL_WR : IB_SIGNAL_REQ_WR;
1455 attr.qp_type = cmd.qp_type;
1456 attr.create_flags = 0;
1457
1458 attr.cap.max_send_wr = cmd.max_send_wr;
1459 attr.cap.max_recv_wr = cmd.max_recv_wr;
1460 attr.cap.max_send_sge = cmd.max_send_sge;
1461 attr.cap.max_recv_sge = cmd.max_recv_sge;
1462 attr.cap.max_inline_data = cmd.max_inline_data;
1463
1464 obj->uevent.events_reported = 0;
1465 INIT_LIST_HEAD(&obj->uevent.event_list);
1466 INIT_LIST_HEAD(&obj->mcast_list);
1467
1468 if (cmd.qp_type == IB_QPT_XRC_TGT)
1469 qp = ib_create_qp(pd, &attr);
1470 else
1471 qp = device->create_qp(pd, &attr, &udata);
1472
1473 if (IS_ERR(qp)) {
1474 ret = PTR_ERR(qp);
1475 goto err_put;
1476 }
1477
1478 if (cmd.qp_type != IB_QPT_XRC_TGT) {
1479 qp->real_qp = qp;
1480 qp->device = device;
1481 qp->pd = pd;
1482 qp->send_cq = attr.send_cq;
1483 qp->recv_cq = attr.recv_cq;
1484 qp->srq = attr.srq;
1485 qp->event_handler = attr.event_handler;
1486 qp->qp_context = attr.qp_context;
1487 qp->qp_type = attr.qp_type;
1488 atomic_set(&qp->usecnt, 0);
1489 atomic_inc(&pd->usecnt);
1490 atomic_inc(&attr.send_cq->usecnt);
1491 if (attr.recv_cq)
1492 atomic_inc(&attr.recv_cq->usecnt);
1493 if (attr.srq)
1494 atomic_inc(&attr.srq->usecnt);
1495 }
1496 qp->uobject = &obj->uevent.uobject;
1497
1498 obj->uevent.uobject.object = qp;
1499 ret = idr_add_uobj(&ib_uverbs_qp_idr, &obj->uevent.uobject);
1500 if (ret)
1501 goto err_destroy;
1502
1503 memset(&resp, 0, sizeof resp);
1504 resp.qpn = qp->qp_num;
1505 resp.qp_handle = obj->uevent.uobject.id;
1506 resp.max_recv_sge = attr.cap.max_recv_sge;
1507 resp.max_send_sge = attr.cap.max_send_sge;
1508 resp.max_recv_wr = attr.cap.max_recv_wr;
1509 resp.max_send_wr = attr.cap.max_send_wr;
1510 resp.max_inline_data = attr.cap.max_inline_data;
1511
1512 if (copy_to_user((void __user *) (unsigned long) cmd.response,
1513 &resp, sizeof resp)) {
1514 ret = -EFAULT;
1515 goto err_copy;
1516 }
1517
1518 if (xrcd)
1519 put_xrcd_read(xrcd_uobj);
1520 if (pd)
1521 put_pd_read(pd);
1522 if (scq)
1523 put_cq_read(scq);
1524 if (rcq && rcq != scq)
1525 put_cq_read(rcq);
1526 if (srq)
1527 put_srq_read(srq);
1528
1529 mutex_lock(&file->mutex);
1530 list_add_tail(&obj->uevent.uobject.list, &file->ucontext->qp_list);
1531 mutex_unlock(&file->mutex);
1532
1533 obj->uevent.uobject.live = 1;
1534
1535 up_write(&obj->uevent.uobject.mutex);
1536
1537 return in_len;
1538
1539 err_copy:
1540 idr_remove_uobj(&ib_uverbs_qp_idr, &obj->uevent.uobject);
1541
1542 err_destroy:
1543 ib_destroy_qp(qp);
1544
1545 err_put:
1546 if (xrcd)
1547 put_xrcd_read(xrcd_uobj);
1548 if (pd)
1549 put_pd_read(pd);
1550 if (scq)
1551 put_cq_read(scq);
1552 if (rcq && rcq != scq)
1553 put_cq_read(rcq);
1554 if (srq)
1555 put_srq_read(srq);
1556
1557 put_uobj_write(&obj->uevent.uobject);
1558 return ret;
1559 }
1560
1561 ssize_t ib_uverbs_open_qp(struct ib_uverbs_file *file,
1562 const char __user *buf, int in_len, int out_len)
1563 {
1564 struct ib_uverbs_open_qp cmd;
1565 struct ib_uverbs_create_qp_resp resp;
1566 struct ib_udata udata;
1567 struct ib_uqp_object *obj;
1568 struct ib_xrcd *xrcd;
1569 struct ib_uobject *uninitialized_var(xrcd_uobj);
1570 struct ib_qp *qp;
1571 struct ib_qp_open_attr attr;
1572 int ret;
1573
1574 if (out_len < sizeof resp)
1575 return -ENOSPC;
1576
1577 if (copy_from_user(&cmd, buf, sizeof cmd))
1578 return -EFAULT;
1579
1580 INIT_UDATA(&udata, buf + sizeof cmd,
1581 (unsigned long) cmd.response + sizeof resp,
1582 in_len - sizeof cmd, out_len - sizeof resp);
1583
1584 obj = kmalloc(sizeof *obj, GFP_KERNEL);
1585 if (!obj)
1586 return -ENOMEM;
1587
1588 init_uobj(&obj->uevent.uobject, cmd.user_handle, file->ucontext, &qp_lock_key);
1589 down_write(&obj->uevent.uobject.mutex);
1590
1591 xrcd = idr_read_xrcd(cmd.pd_handle, file->ucontext, &xrcd_uobj);
1592 if (!xrcd) {
1593 ret = -EINVAL;
1594 goto err_put;
1595 }
1596
1597 attr.event_handler = ib_uverbs_qp_event_handler;
1598 attr.qp_context = file;
1599 attr.qp_num = cmd.qpn;
1600 attr.qp_type = cmd.qp_type;
1601
1602 obj->uevent.events_reported = 0;
1603 INIT_LIST_HEAD(&obj->uevent.event_list);
1604 INIT_LIST_HEAD(&obj->mcast_list);
1605
1606 qp = ib_open_qp(xrcd, &attr);
1607 if (IS_ERR(qp)) {
1608 ret = PTR_ERR(qp);
1609 goto err_put;
1610 }
1611
1612 qp->uobject = &obj->uevent.uobject;
1613
1614 obj->uevent.uobject.object = qp;
1615 ret = idr_add_uobj(&ib_uverbs_qp_idr, &obj->uevent.uobject);
1616 if (ret)
1617 goto err_destroy;
1618
1619 memset(&resp, 0, sizeof resp);
1620 resp.qpn = qp->qp_num;
1621 resp.qp_handle = obj->uevent.uobject.id;
1622
1623 if (copy_to_user((void __user *) (unsigned long) cmd.response,
1624 &resp, sizeof resp)) {
1625 ret = -EFAULT;
1626 goto err_remove;
1627 }
1628
1629 put_xrcd_read(xrcd_uobj);
1630
1631 mutex_lock(&file->mutex);
1632 list_add_tail(&obj->uevent.uobject.list, &file->ucontext->qp_list);
1633 mutex_unlock(&file->mutex);
1634
1635 obj->uevent.uobject.live = 1;
1636
1637 up_write(&obj->uevent.uobject.mutex);
1638
1639 return in_len;
1640
1641 err_remove:
1642 idr_remove_uobj(&ib_uverbs_qp_idr, &obj->uevent.uobject);
1643
1644 err_destroy:
1645 ib_destroy_qp(qp);
1646
1647 err_put:
1648 put_xrcd_read(xrcd_uobj);
1649 put_uobj_write(&obj->uevent.uobject);
1650 return ret;
1651 }
1652
1653 ssize_t ib_uverbs_query_qp(struct ib_uverbs_file *file,
1654 const char __user *buf, int in_len,
1655 int out_len)
1656 {
1657 struct ib_uverbs_query_qp cmd;
1658 struct ib_uverbs_query_qp_resp resp;
1659 struct ib_qp *qp;
1660 struct ib_qp_attr *attr;
1661 struct ib_qp_init_attr *init_attr;
1662 int ret;
1663
1664 if (copy_from_user(&cmd, buf, sizeof cmd))
1665 return -EFAULT;
1666
1667 attr = kmalloc(sizeof *attr, GFP_KERNEL);
1668 init_attr = kmalloc(sizeof *init_attr, GFP_KERNEL);
1669 if (!attr || !init_attr) {
1670 ret = -ENOMEM;
1671 goto out;
1672 }
1673
1674 qp = idr_read_qp(cmd.qp_handle, file->ucontext);
1675 if (!qp) {
1676 ret = -EINVAL;
1677 goto out;
1678 }
1679
1680 ret = ib_query_qp(qp, attr, cmd.attr_mask, init_attr);
1681
1682 put_qp_read(qp);
1683
1684 if (ret)
1685 goto out;
1686
1687 memset(&resp, 0, sizeof resp);
1688
1689 resp.qp_state = attr->qp_state;
1690 resp.cur_qp_state = attr->cur_qp_state;
1691 resp.path_mtu = attr->path_mtu;
1692 resp.path_mig_state = attr->path_mig_state;
1693 resp.qkey = attr->qkey;
1694 resp.rq_psn = attr->rq_psn;
1695 resp.sq_psn = attr->sq_psn;
1696 resp.dest_qp_num = attr->dest_qp_num;
1697 resp.qp_access_flags = attr->qp_access_flags;
1698 resp.pkey_index = attr->pkey_index;
1699 resp.alt_pkey_index = attr->alt_pkey_index;
1700 resp.sq_draining = attr->sq_draining;
1701 resp.max_rd_atomic = attr->max_rd_atomic;
1702 resp.max_dest_rd_atomic = attr->max_dest_rd_atomic;
1703 resp.min_rnr_timer = attr->min_rnr_timer;
1704 resp.port_num = attr->port_num;
1705 resp.timeout = attr->timeout;
1706 resp.retry_cnt = attr->retry_cnt;
1707 resp.rnr_retry = attr->rnr_retry;
1708 resp.alt_port_num = attr->alt_port_num;
1709 resp.alt_timeout = attr->alt_timeout;
1710
1711 memcpy(resp.dest.dgid, attr->ah_attr.grh.dgid.raw, 16);
1712 resp.dest.flow_label = attr->ah_attr.grh.flow_label;
1713 resp.dest.sgid_index = attr->ah_attr.grh.sgid_index;
1714 resp.dest.hop_limit = attr->ah_attr.grh.hop_limit;
1715 resp.dest.traffic_class = attr->ah_attr.grh.traffic_class;
1716 resp.dest.dlid = attr->ah_attr.dlid;
1717 resp.dest.sl = attr->ah_attr.sl;
1718 resp.dest.src_path_bits = attr->ah_attr.src_path_bits;
1719 resp.dest.static_rate = attr->ah_attr.static_rate;
1720 resp.dest.is_global = !!(attr->ah_attr.ah_flags & IB_AH_GRH);
1721 resp.dest.port_num = attr->ah_attr.port_num;
1722
1723 memcpy(resp.alt_dest.dgid, attr->alt_ah_attr.grh.dgid.raw, 16);
1724 resp.alt_dest.flow_label = attr->alt_ah_attr.grh.flow_label;
1725 resp.alt_dest.sgid_index = attr->alt_ah_attr.grh.sgid_index;
1726 resp.alt_dest.hop_limit = attr->alt_ah_attr.grh.hop_limit;
1727 resp.alt_dest.traffic_class = attr->alt_ah_attr.grh.traffic_class;
1728 resp.alt_dest.dlid = attr->alt_ah_attr.dlid;
1729 resp.alt_dest.sl = attr->alt_ah_attr.sl;
1730 resp.alt_dest.src_path_bits = attr->alt_ah_attr.src_path_bits;
1731 resp.alt_dest.static_rate = attr->alt_ah_attr.static_rate;
1732 resp.alt_dest.is_global = !!(attr->alt_ah_attr.ah_flags & IB_AH_GRH);
1733 resp.alt_dest.port_num = attr->alt_ah_attr.port_num;
1734
1735 resp.max_send_wr = init_attr->cap.max_send_wr;
1736 resp.max_recv_wr = init_attr->cap.max_recv_wr;
1737 resp.max_send_sge = init_attr->cap.max_send_sge;
1738 resp.max_recv_sge = init_attr->cap.max_recv_sge;
1739 resp.max_inline_data = init_attr->cap.max_inline_data;
1740 resp.sq_sig_all = init_attr->sq_sig_type == IB_SIGNAL_ALL_WR;
1741
1742 if (copy_to_user((void __user *) (unsigned long) cmd.response,
1743 &resp, sizeof resp))
1744 ret = -EFAULT;
1745
1746 out:
1747 kfree(attr);
1748 kfree(init_attr);
1749
1750 return ret ? ret : in_len;
1751 }
1752
1753 /* Remove ignored fields set in the attribute mask */
1754 static int modify_qp_mask(enum ib_qp_type qp_type, int mask)
1755 {
1756 switch (qp_type) {
1757 case IB_QPT_XRC_INI:
1758 return mask & ~(IB_QP_MAX_DEST_RD_ATOMIC | IB_QP_MIN_RNR_TIMER);
1759 case IB_QPT_XRC_TGT:
1760 return mask & ~(IB_QP_MAX_QP_RD_ATOMIC | IB_QP_RETRY_CNT |
1761 IB_QP_RNR_RETRY);
1762 default:
1763 return mask;
1764 }
1765 }
1766
1767 ssize_t ib_uverbs_modify_qp(struct ib_uverbs_file *file,
1768 const char __user *buf, int in_len,
1769 int out_len)
1770 {
1771 struct ib_uverbs_modify_qp cmd;
1772 struct ib_udata udata;
1773 struct ib_qp *qp;
1774 struct ib_qp_attr *attr;
1775 int ret;
1776
1777 if (copy_from_user(&cmd, buf, sizeof cmd))
1778 return -EFAULT;
1779
1780 INIT_UDATA(&udata, buf + sizeof cmd, NULL, in_len - sizeof cmd,
1781 out_len);
1782
1783 attr = kmalloc(sizeof *attr, GFP_KERNEL);
1784 if (!attr)
1785 return -ENOMEM;
1786
1787 qp = idr_read_qp(cmd.qp_handle, file->ucontext);
1788 if (!qp) {
1789 ret = -EINVAL;
1790 goto out;
1791 }
1792
1793 attr->qp_state = cmd.qp_state;
1794 attr->cur_qp_state = cmd.cur_qp_state;
1795 attr->path_mtu = cmd.path_mtu;
1796 attr->path_mig_state = cmd.path_mig_state;
1797 attr->qkey = cmd.qkey;
1798 attr->rq_psn = cmd.rq_psn;
1799 attr->sq_psn = cmd.sq_psn;
1800 attr->dest_qp_num = cmd.dest_qp_num;
1801 attr->qp_access_flags = cmd.qp_access_flags;
1802 attr->pkey_index = cmd.pkey_index;
1803 attr->alt_pkey_index = cmd.alt_pkey_index;
1804 attr->en_sqd_async_notify = cmd.en_sqd_async_notify;
1805 attr->max_rd_atomic = cmd.max_rd_atomic;
1806 attr->max_dest_rd_atomic = cmd.max_dest_rd_atomic;
1807 attr->min_rnr_timer = cmd.min_rnr_timer;
1808 attr->port_num = cmd.port_num;
1809 attr->timeout = cmd.timeout;
1810 attr->retry_cnt = cmd.retry_cnt;
1811 attr->rnr_retry = cmd.rnr_retry;
1812 attr->alt_port_num = cmd.alt_port_num;
1813 attr->alt_timeout = cmd.alt_timeout;
1814
1815 memcpy(attr->ah_attr.grh.dgid.raw, cmd.dest.dgid, 16);
1816 attr->ah_attr.grh.flow_label = cmd.dest.flow_label;
1817 attr->ah_attr.grh.sgid_index = cmd.dest.sgid_index;
1818 attr->ah_attr.grh.hop_limit = cmd.dest.hop_limit;
1819 attr->ah_attr.grh.traffic_class = cmd.dest.traffic_class;
1820 attr->ah_attr.dlid = cmd.dest.dlid;
1821 attr->ah_attr.sl = cmd.dest.sl;
1822 attr->ah_attr.src_path_bits = cmd.dest.src_path_bits;
1823 attr->ah_attr.static_rate = cmd.dest.static_rate;
1824 attr->ah_attr.ah_flags = cmd.dest.is_global ? IB_AH_GRH : 0;
1825 attr->ah_attr.port_num = cmd.dest.port_num;
1826
1827 memcpy(attr->alt_ah_attr.grh.dgid.raw, cmd.alt_dest.dgid, 16);
1828 attr->alt_ah_attr.grh.flow_label = cmd.alt_dest.flow_label;
1829 attr->alt_ah_attr.grh.sgid_index = cmd.alt_dest.sgid_index;
1830 attr->alt_ah_attr.grh.hop_limit = cmd.alt_dest.hop_limit;
1831 attr->alt_ah_attr.grh.traffic_class = cmd.alt_dest.traffic_class;
1832 attr->alt_ah_attr.dlid = cmd.alt_dest.dlid;
1833 attr->alt_ah_attr.sl = cmd.alt_dest.sl;
1834 attr->alt_ah_attr.src_path_bits = cmd.alt_dest.src_path_bits;
1835 attr->alt_ah_attr.static_rate = cmd.alt_dest.static_rate;
1836 attr->alt_ah_attr.ah_flags = cmd.alt_dest.is_global ? IB_AH_GRH : 0;
1837 attr->alt_ah_attr.port_num = cmd.alt_dest.port_num;
1838
1839 if (qp->real_qp == qp) {
1840 ret = qp->device->modify_qp(qp, attr,
1841 modify_qp_mask(qp->qp_type, cmd.attr_mask), &udata);
1842 } else {
1843 ret = ib_modify_qp(qp, attr, modify_qp_mask(qp->qp_type, cmd.attr_mask));
1844 }
1845
1846 put_qp_read(qp);
1847
1848 if (ret)
1849 goto out;
1850
1851 ret = in_len;
1852
1853 out:
1854 kfree(attr);
1855
1856 return ret;
1857 }
1858
1859 ssize_t ib_uverbs_destroy_qp(struct ib_uverbs_file *file,
1860 const char __user *buf, int in_len,
1861 int out_len)
1862 {
1863 struct ib_uverbs_destroy_qp cmd;
1864 struct ib_uverbs_destroy_qp_resp resp;
1865 struct ib_uobject *uobj;
1866 struct ib_qp *qp;
1867 struct ib_uqp_object *obj;
1868 int ret = -EINVAL;
1869
1870 if (copy_from_user(&cmd, buf, sizeof cmd))
1871 return -EFAULT;
1872
1873 memset(&resp, 0, sizeof resp);
1874
1875 uobj = idr_write_uobj(&ib_uverbs_qp_idr, cmd.qp_handle, file->ucontext);
1876 if (!uobj)
1877 return -EINVAL;
1878 qp = uobj->object;
1879 obj = container_of(uobj, struct ib_uqp_object, uevent.uobject);
1880
1881 if (!list_empty(&obj->mcast_list)) {
1882 put_uobj_write(uobj);
1883 return -EBUSY;
1884 }
1885
1886 ret = ib_destroy_qp(qp);
1887 if (!ret)
1888 uobj->live = 0;
1889
1890 put_uobj_write(uobj);
1891
1892 if (ret)
1893 return ret;
1894
1895 idr_remove_uobj(&ib_uverbs_qp_idr, uobj);
1896
1897 mutex_lock(&file->mutex);
1898 list_del(&uobj->list);
1899 mutex_unlock(&file->mutex);
1900
1901 ib_uverbs_release_uevent(file, &obj->uevent);
1902
1903 resp.events_reported = obj->uevent.events_reported;
1904
1905 put_uobj(uobj);
1906
1907 if (copy_to_user((void __user *) (unsigned long) cmd.response,
1908 &resp, sizeof resp))
1909 return -EFAULT;
1910
1911 return in_len;
1912 }
1913
1914 ssize_t ib_uverbs_post_send(struct ib_uverbs_file *file,
1915 const char __user *buf, int in_len,
1916 int out_len)
1917 {
1918 struct ib_uverbs_post_send cmd;
1919 struct ib_uverbs_post_send_resp resp;
1920 struct ib_uverbs_send_wr *user_wr;
1921 struct ib_send_wr *wr = NULL, *last, *next, *bad_wr;
1922 struct ib_qp *qp;
1923 int i, sg_ind;
1924 int is_ud;
1925 ssize_t ret = -EINVAL;
1926
1927 if (copy_from_user(&cmd, buf, sizeof cmd))
1928 return -EFAULT;
1929
1930 if (in_len < sizeof cmd + cmd.wqe_size * cmd.wr_count +
1931 cmd.sge_count * sizeof (struct ib_uverbs_sge))
1932 return -EINVAL;
1933
1934 if (cmd.wqe_size < sizeof (struct ib_uverbs_send_wr))
1935 return -EINVAL;
1936
1937 user_wr = kmalloc(cmd.wqe_size, GFP_KERNEL);
1938 if (!user_wr)
1939 return -ENOMEM;
1940
1941 qp = idr_read_qp(cmd.qp_handle, file->ucontext);
1942 if (!qp)
1943 goto out;
1944
1945 is_ud = qp->qp_type == IB_QPT_UD;
1946 sg_ind = 0;
1947 last = NULL;
1948 for (i = 0; i < cmd.wr_count; ++i) {
1949 if (copy_from_user(user_wr,
1950 buf + sizeof cmd + i * cmd.wqe_size,
1951 cmd.wqe_size)) {
1952 ret = -EFAULT;
1953 goto out_put;
1954 }
1955
1956 if (user_wr->num_sge + sg_ind > cmd.sge_count) {
1957 ret = -EINVAL;
1958 goto out_put;
1959 }
1960
1961 next = kmalloc(ALIGN(sizeof *next, sizeof (struct ib_sge)) +
1962 user_wr->num_sge * sizeof (struct ib_sge),
1963 GFP_KERNEL);
1964 if (!next) {
1965 ret = -ENOMEM;
1966 goto out_put;
1967 }
1968
1969 if (!last)
1970 wr = next;
1971 else
1972 last->next = next;
1973 last = next;
1974
1975 next->next = NULL;
1976 next->wr_id = user_wr->wr_id;
1977 next->num_sge = user_wr->num_sge;
1978 next->opcode = user_wr->opcode;
1979 next->send_flags = user_wr->send_flags;
1980
1981 if (is_ud) {
1982 next->wr.ud.ah = idr_read_ah(user_wr->wr.ud.ah,
1983 file->ucontext);
1984 if (!next->wr.ud.ah) {
1985 ret = -EINVAL;
1986 goto out_put;
1987 }
1988 next->wr.ud.remote_qpn = user_wr->wr.ud.remote_qpn;
1989 next->wr.ud.remote_qkey = user_wr->wr.ud.remote_qkey;
1990 } else {
1991 switch (next->opcode) {
1992 case IB_WR_RDMA_WRITE_WITH_IMM:
1993 next->ex.imm_data =
1994 (__be32 __force) user_wr->ex.imm_data;
1995 case IB_WR_RDMA_WRITE:
1996 case IB_WR_RDMA_READ:
1997 next->wr.rdma.remote_addr =
1998 user_wr->wr.rdma.remote_addr;
1999 next->wr.rdma.rkey =
2000 user_wr->wr.rdma.rkey;
2001 break;
2002 case IB_WR_SEND_WITH_IMM:
2003 next->ex.imm_data =
2004 (__be32 __force) user_wr->ex.imm_data;
2005 break;
2006 case IB_WR_SEND_WITH_INV:
2007 next->ex.invalidate_rkey =
2008 user_wr->ex.invalidate_rkey;
2009 break;
2010 case IB_WR_ATOMIC_CMP_AND_SWP:
2011 case IB_WR_ATOMIC_FETCH_AND_ADD:
2012 next->wr.atomic.remote_addr =
2013 user_wr->wr.atomic.remote_addr;
2014 next->wr.atomic.compare_add =
2015 user_wr->wr.atomic.compare_add;
2016 next->wr.atomic.swap = user_wr->wr.atomic.swap;
2017 next->wr.atomic.rkey = user_wr->wr.atomic.rkey;
2018 break;
2019 default:
2020 break;
2021 }
2022 }
2023
2024 if (next->num_sge) {
2025 next->sg_list = (void *) next +
2026 ALIGN(sizeof *next, sizeof (struct ib_sge));
2027 if (copy_from_user(next->sg_list,
2028 buf + sizeof cmd +
2029 cmd.wr_count * cmd.wqe_size +
2030 sg_ind * sizeof (struct ib_sge),
2031 next->num_sge * sizeof (struct ib_sge))) {
2032 ret = -EFAULT;
2033 goto out_put;
2034 }
2035 sg_ind += next->num_sge;
2036 } else
2037 next->sg_list = NULL;
2038 }
2039
2040 resp.bad_wr = 0;
2041 ret = qp->device->post_send(qp->real_qp, wr, &bad_wr);
2042 if (ret)
2043 for (next = wr; next; next = next->next) {
2044 ++resp.bad_wr;
2045 if (next == bad_wr)
2046 break;
2047 }
2048
2049 if (copy_to_user((void __user *) (unsigned long) cmd.response,
2050 &resp, sizeof resp))
2051 ret = -EFAULT;
2052
2053 out_put:
2054 put_qp_read(qp);
2055
2056 while (wr) {
2057 if (is_ud && wr->wr.ud.ah)
2058 put_ah_read(wr->wr.ud.ah);
2059 next = wr->next;
2060 kfree(wr);
2061 wr = next;
2062 }
2063
2064 out:
2065 kfree(user_wr);
2066
2067 return ret ? ret : in_len;
2068 }
2069
2070 static struct ib_recv_wr *ib_uverbs_unmarshall_recv(const char __user *buf,
2071 int in_len,
2072 u32 wr_count,
2073 u32 sge_count,
2074 u32 wqe_size)
2075 {
2076 struct ib_uverbs_recv_wr *user_wr;
2077 struct ib_recv_wr *wr = NULL, *last, *next;
2078 int sg_ind;
2079 int i;
2080 int ret;
2081
2082 if (in_len < wqe_size * wr_count +
2083 sge_count * sizeof (struct ib_uverbs_sge))
2084 return ERR_PTR(-EINVAL);
2085
2086 if (wqe_size < sizeof (struct ib_uverbs_recv_wr))
2087 return ERR_PTR(-EINVAL);
2088
2089 user_wr = kmalloc(wqe_size, GFP_KERNEL);
2090 if (!user_wr)
2091 return ERR_PTR(-ENOMEM);
2092
2093 sg_ind = 0;
2094 last = NULL;
2095 for (i = 0; i < wr_count; ++i) {
2096 if (copy_from_user(user_wr, buf + i * wqe_size,
2097 wqe_size)) {
2098 ret = -EFAULT;
2099 goto err;
2100 }
2101
2102 if (user_wr->num_sge + sg_ind > sge_count) {
2103 ret = -EINVAL;
2104 goto err;
2105 }
2106
2107 next = kmalloc(ALIGN(sizeof *next, sizeof (struct ib_sge)) +
2108 user_wr->num_sge * sizeof (struct ib_sge),
2109 GFP_KERNEL);
2110 if (!next) {
2111 ret = -ENOMEM;
2112 goto err;
2113 }
2114
2115 if (!last)
2116 wr = next;
2117 else
2118 last->next = next;
2119 last = next;
2120
2121 next->next = NULL;
2122 next->wr_id = user_wr->wr_id;
2123 next->num_sge = user_wr->num_sge;
2124
2125 if (next->num_sge) {
2126 next->sg_list = (void *) next +
2127 ALIGN(sizeof *next, sizeof (struct ib_sge));
2128 if (copy_from_user(next->sg_list,
2129 buf + wr_count * wqe_size +
2130 sg_ind * sizeof (struct ib_sge),
2131 next->num_sge * sizeof (struct ib_sge))) {
2132 ret = -EFAULT;
2133 goto err;
2134 }
2135 sg_ind += next->num_sge;
2136 } else
2137 next->sg_list = NULL;
2138 }
2139
2140 kfree(user_wr);
2141 return wr;
2142
2143 err:
2144 kfree(user_wr);
2145
2146 while (wr) {
2147 next = wr->next;
2148 kfree(wr);
2149 wr = next;
2150 }
2151
2152 return ERR_PTR(ret);
2153 }
2154
2155 ssize_t ib_uverbs_post_recv(struct ib_uverbs_file *file,
2156 const char __user *buf, int in_len,
2157 int out_len)
2158 {
2159 struct ib_uverbs_post_recv cmd;
2160 struct ib_uverbs_post_recv_resp resp;
2161 struct ib_recv_wr *wr, *next, *bad_wr;
2162 struct ib_qp *qp;
2163 ssize_t ret = -EINVAL;
2164
2165 if (copy_from_user(&cmd, buf, sizeof cmd))
2166 return -EFAULT;
2167
2168 wr = ib_uverbs_unmarshall_recv(buf + sizeof cmd,
2169 in_len - sizeof cmd, cmd.wr_count,
2170 cmd.sge_count, cmd.wqe_size);
2171 if (IS_ERR(wr))
2172 return PTR_ERR(wr);
2173
2174 qp = idr_read_qp(cmd.qp_handle, file->ucontext);
2175 if (!qp)
2176 goto out;
2177
2178 resp.bad_wr = 0;
2179 ret = qp->device->post_recv(qp->real_qp, wr, &bad_wr);
2180
2181 put_qp_read(qp);
2182
2183 if (ret)
2184 for (next = wr; next; next = next->next) {
2185 ++resp.bad_wr;
2186 if (next == bad_wr)
2187 break;
2188 }
2189
2190 if (copy_to_user((void __user *) (unsigned long) cmd.response,
2191 &resp, sizeof resp))
2192 ret = -EFAULT;
2193
2194 out:
2195 while (wr) {
2196 next = wr->next;
2197 kfree(wr);
2198 wr = next;
2199 }
2200
2201 return ret ? ret : in_len;
2202 }
2203
2204 ssize_t ib_uverbs_post_srq_recv(struct ib_uverbs_file *file,
2205 const char __user *buf, int in_len,
2206 int out_len)
2207 {
2208 struct ib_uverbs_post_srq_recv cmd;
2209 struct ib_uverbs_post_srq_recv_resp resp;
2210 struct ib_recv_wr *wr, *next, *bad_wr;
2211 struct ib_srq *srq;
2212 ssize_t ret = -EINVAL;
2213
2214 if (copy_from_user(&cmd, buf, sizeof cmd))
2215 return -EFAULT;
2216
2217 wr = ib_uverbs_unmarshall_recv(buf + sizeof cmd,
2218 in_len - sizeof cmd, cmd.wr_count,
2219 cmd.sge_count, cmd.wqe_size);
2220 if (IS_ERR(wr))
2221 return PTR_ERR(wr);
2222
2223 srq = idr_read_srq(cmd.srq_handle, file->ucontext);
2224 if (!srq)
2225 goto out;
2226
2227 resp.bad_wr = 0;
2228 ret = srq->device->post_srq_recv(srq, wr, &bad_wr);
2229
2230 put_srq_read(srq);
2231
2232 if (ret)
2233 for (next = wr; next; next = next->next) {
2234 ++resp.bad_wr;
2235 if (next == bad_wr)
2236 break;
2237 }
2238
2239 if (copy_to_user((void __user *) (unsigned long) cmd.response,
2240 &resp, sizeof resp))
2241 ret = -EFAULT;
2242
2243 out:
2244 while (wr) {
2245 next = wr->next;
2246 kfree(wr);
2247 wr = next;
2248 }
2249
2250 return ret ? ret : in_len;
2251 }
2252
2253 ssize_t ib_uverbs_create_ah(struct ib_uverbs_file *file,
2254 const char __user *buf, int in_len,
2255 int out_len)
2256 {
2257 struct ib_uverbs_create_ah cmd;
2258 struct ib_uverbs_create_ah_resp resp;
2259 struct ib_uobject *uobj;
2260 struct ib_pd *pd;
2261 struct ib_ah *ah;
2262 struct ib_ah_attr attr;
2263 int ret;
2264
2265 if (out_len < sizeof resp)
2266 return -ENOSPC;
2267
2268 if (copy_from_user(&cmd, buf, sizeof cmd))
2269 return -EFAULT;
2270
2271 uobj = kmalloc(sizeof *uobj, GFP_KERNEL);
2272 if (!uobj)
2273 return -ENOMEM;
2274
2275 init_uobj(uobj, cmd.user_handle, file->ucontext, &ah_lock_key);
2276 down_write(&uobj->mutex);
2277
2278 pd = idr_read_pd(cmd.pd_handle, file->ucontext);
2279 if (!pd) {
2280 ret = -EINVAL;
2281 goto err;
2282 }
2283
2284 attr.dlid = cmd.attr.dlid;
2285 attr.sl = cmd.attr.sl;
2286 attr.src_path_bits = cmd.attr.src_path_bits;
2287 attr.static_rate = cmd.attr.static_rate;
2288 attr.ah_flags = cmd.attr.is_global ? IB_AH_GRH : 0;
2289 attr.port_num = cmd.attr.port_num;
2290 attr.grh.flow_label = cmd.attr.grh.flow_label;
2291 attr.grh.sgid_index = cmd.attr.grh.sgid_index;
2292 attr.grh.hop_limit = cmd.attr.grh.hop_limit;
2293 attr.grh.traffic_class = cmd.attr.grh.traffic_class;
2294 memcpy(attr.grh.dgid.raw, cmd.attr.grh.dgid, 16);
2295
2296 ah = ib_create_ah(pd, &attr);
2297 if (IS_ERR(ah)) {
2298 ret = PTR_ERR(ah);
2299 goto err_put;
2300 }
2301
2302 ah->uobject = uobj;
2303 uobj->object = ah;
2304
2305 ret = idr_add_uobj(&ib_uverbs_ah_idr, uobj);
2306 if (ret)
2307 goto err_destroy;
2308
2309 resp.ah_handle = uobj->id;
2310
2311 if (copy_to_user((void __user *) (unsigned long) cmd.response,
2312 &resp, sizeof resp)) {
2313 ret = -EFAULT;
2314 goto err_copy;
2315 }
2316
2317 put_pd_read(pd);
2318
2319 mutex_lock(&file->mutex);
2320 list_add_tail(&uobj->list, &file->ucontext->ah_list);
2321 mutex_unlock(&file->mutex);
2322
2323 uobj->live = 1;
2324
2325 up_write(&uobj->mutex);
2326
2327 return in_len;
2328
2329 err_copy:
2330 idr_remove_uobj(&ib_uverbs_ah_idr, uobj);
2331
2332 err_destroy:
2333 ib_destroy_ah(ah);
2334
2335 err_put:
2336 put_pd_read(pd);
2337
2338 err:
2339 put_uobj_write(uobj);
2340 return ret;
2341 }
2342
2343 ssize_t ib_uverbs_destroy_ah(struct ib_uverbs_file *file,
2344 const char __user *buf, int in_len, int out_len)
2345 {
2346 struct ib_uverbs_destroy_ah cmd;
2347 struct ib_ah *ah;
2348 struct ib_uobject *uobj;
2349 int ret;
2350
2351 if (copy_from_user(&cmd, buf, sizeof cmd))
2352 return -EFAULT;
2353
2354 uobj = idr_write_uobj(&ib_uverbs_ah_idr, cmd.ah_handle, file->ucontext);
2355 if (!uobj)
2356 return -EINVAL;
2357 ah = uobj->object;
2358
2359 ret = ib_destroy_ah(ah);
2360 if (!ret)
2361 uobj->live = 0;
2362
2363 put_uobj_write(uobj);
2364
2365 if (ret)
2366 return ret;
2367
2368 idr_remove_uobj(&ib_uverbs_ah_idr, uobj);
2369
2370 mutex_lock(&file->mutex);
2371 list_del(&uobj->list);
2372 mutex_unlock(&file->mutex);
2373
2374 put_uobj(uobj);
2375
2376 return in_len;
2377 }
2378
2379 ssize_t ib_uverbs_attach_mcast(struct ib_uverbs_file *file,
2380 const char __user *buf, int in_len,
2381 int out_len)
2382 {
2383 struct ib_uverbs_attach_mcast cmd;
2384 struct ib_qp *qp;
2385 struct ib_uqp_object *obj;
2386 struct ib_uverbs_mcast_entry *mcast;
2387 int ret;
2388
2389 if (copy_from_user(&cmd, buf, sizeof cmd))
2390 return -EFAULT;
2391
2392 qp = idr_write_qp(cmd.qp_handle, file->ucontext);
2393 if (!qp)
2394 return -EINVAL;
2395
2396 obj = container_of(qp->uobject, struct ib_uqp_object, uevent.uobject);
2397
2398 list_for_each_entry(mcast, &obj->mcast_list, list)
2399 if (cmd.mlid == mcast->lid &&
2400 !memcmp(cmd.gid, mcast->gid.raw, sizeof mcast->gid.raw)) {
2401 ret = 0;
2402 goto out_put;
2403 }
2404
2405 mcast = kmalloc(sizeof *mcast, GFP_KERNEL);
2406 if (!mcast) {
2407 ret = -ENOMEM;
2408 goto out_put;
2409 }
2410
2411 mcast->lid = cmd.mlid;
2412 memcpy(mcast->gid.raw, cmd.gid, sizeof mcast->gid.raw);
2413
2414 ret = ib_attach_mcast(qp, &mcast->gid, cmd.mlid);
2415 if (!ret)
2416 list_add_tail(&mcast->list, &obj->mcast_list);
2417 else
2418 kfree(mcast);
2419
2420 out_put:
2421 put_qp_write(qp);
2422
2423 return ret ? ret : in_len;
2424 }
2425
2426 ssize_t ib_uverbs_detach_mcast(struct ib_uverbs_file *file,
2427 const char __user *buf, int in_len,
2428 int out_len)
2429 {
2430 struct ib_uverbs_detach_mcast cmd;
2431 struct ib_uqp_object *obj;
2432 struct ib_qp *qp;
2433 struct ib_uverbs_mcast_entry *mcast;
2434 int ret = -EINVAL;
2435
2436 if (copy_from_user(&cmd, buf, sizeof cmd))
2437 return -EFAULT;
2438
2439 qp = idr_write_qp(cmd.qp_handle, file->ucontext);
2440 if (!qp)
2441 return -EINVAL;
2442
2443 ret = ib_detach_mcast(qp, (union ib_gid *) cmd.gid, cmd.mlid);
2444 if (ret)
2445 goto out_put;
2446
2447 obj = container_of(qp->uobject, struct ib_uqp_object, uevent.uobject);
2448
2449 list_for_each_entry(mcast, &obj->mcast_list, list)
2450 if (cmd.mlid == mcast->lid &&
2451 !memcmp(cmd.gid, mcast->gid.raw, sizeof mcast->gid.raw)) {
2452 list_del(&mcast->list);
2453 kfree(mcast);
2454 break;
2455 }
2456
2457 out_put:
2458 put_qp_write(qp);
2459
2460 return ret ? ret : in_len;
2461 }
2462
2463 static int __uverbs_create_xsrq(struct ib_uverbs_file *file,
2464 struct ib_uverbs_create_xsrq *cmd,
2465 struct ib_udata *udata)
2466 {
2467 struct ib_uverbs_create_srq_resp resp;
2468 struct ib_usrq_object *obj;
2469 struct ib_pd *pd;
2470 struct ib_srq *srq;
2471 struct ib_uobject *uninitialized_var(xrcd_uobj);
2472 struct ib_srq_init_attr attr;
2473 int ret;
2474
2475 obj = kmalloc(sizeof *obj, GFP_KERNEL);
2476 if (!obj)
2477 return -ENOMEM;
2478
2479 init_uobj(&obj->uevent.uobject, cmd->user_handle, file->ucontext, &srq_lock_key);
2480 down_write(&obj->uevent.uobject.mutex);
2481
2482 pd = idr_read_pd(cmd->pd_handle, file->ucontext);
2483 if (!pd) {
2484 ret = -EINVAL;
2485 goto err;
2486 }
2487
2488 if (cmd->srq_type == IB_SRQT_XRC) {
2489 attr.ext.xrc.cq = idr_read_cq(cmd->cq_handle, file->ucontext, 0);
2490 if (!attr.ext.xrc.cq) {
2491 ret = -EINVAL;
2492 goto err_put_pd;
2493 }
2494
2495 attr.ext.xrc.xrcd = idr_read_xrcd(cmd->xrcd_handle, file->ucontext, &xrcd_uobj);
2496 if (!attr.ext.xrc.xrcd) {
2497 ret = -EINVAL;
2498 goto err_put_cq;
2499 }
2500
2501 obj->uxrcd = container_of(xrcd_uobj, struct ib_uxrcd_object, uobject);
2502 atomic_inc(&obj->uxrcd->refcnt);
2503 }
2504
2505 attr.event_handler = ib_uverbs_srq_event_handler;
2506 attr.srq_context = file;
2507 attr.srq_type = cmd->srq_type;
2508 attr.attr.max_wr = cmd->max_wr;
2509 attr.attr.max_sge = cmd->max_sge;
2510 attr.attr.srq_limit = cmd->srq_limit;
2511
2512 obj->uevent.events_reported = 0;
2513 INIT_LIST_HEAD(&obj->uevent.event_list);
2514
2515 srq = pd->device->create_srq(pd, &attr, udata);
2516 if (IS_ERR(srq)) {
2517 ret = PTR_ERR(srq);
2518 goto err_put;
2519 }
2520
2521 srq->device = pd->device;
2522 srq->pd = pd;
2523 srq->srq_type = cmd->srq_type;
2524 srq->uobject = &obj->uevent.uobject;
2525 srq->event_handler = attr.event_handler;
2526 srq->srq_context = attr.srq_context;
2527
2528 if (cmd->srq_type == IB_SRQT_XRC) {
2529 srq->ext.xrc.cq = attr.ext.xrc.cq;
2530 srq->ext.xrc.xrcd = attr.ext.xrc.xrcd;
2531 atomic_inc(&attr.ext.xrc.cq->usecnt);
2532 atomic_inc(&attr.ext.xrc.xrcd->usecnt);
2533 }
2534
2535 atomic_inc(&pd->usecnt);
2536 atomic_set(&srq->usecnt, 0);
2537
2538 obj->uevent.uobject.object = srq;
2539 ret = idr_add_uobj(&ib_uverbs_srq_idr, &obj->uevent.uobject);
2540 if (ret)
2541 goto err_destroy;
2542
2543 memset(&resp, 0, sizeof resp);
2544 resp.srq_handle = obj->uevent.uobject.id;
2545 resp.max_wr = attr.attr.max_wr;
2546 resp.max_sge = attr.attr.max_sge;
2547 if (cmd->srq_type == IB_SRQT_XRC)
2548 resp.srqn = srq->ext.xrc.srq_num;
2549
2550 if (copy_to_user((void __user *) (unsigned long) cmd->response,
2551 &resp, sizeof resp)) {
2552 ret = -EFAULT;
2553 goto err_copy;
2554 }
2555
2556 if (cmd->srq_type == IB_SRQT_XRC) {
2557 put_uobj_read(xrcd_uobj);
2558 put_cq_read(attr.ext.xrc.cq);
2559 }
2560 put_pd_read(pd);
2561
2562 mutex_lock(&file->mutex);
2563 list_add_tail(&obj->uevent.uobject.list, &file->ucontext->srq_list);
2564 mutex_unlock(&file->mutex);
2565
2566 obj->uevent.uobject.live = 1;
2567
2568 up_write(&obj->uevent.uobject.mutex);
2569
2570 return 0;
2571
2572 err_copy:
2573 idr_remove_uobj(&ib_uverbs_srq_idr, &obj->uevent.uobject);
2574
2575 err_destroy:
2576 ib_destroy_srq(srq);
2577
2578 err_put:
2579 if (cmd->srq_type == IB_SRQT_XRC) {
2580 atomic_dec(&obj->uxrcd->refcnt);
2581 put_uobj_read(xrcd_uobj);
2582 }
2583
2584 err_put_cq:
2585 if (cmd->srq_type == IB_SRQT_XRC)
2586 put_cq_read(attr.ext.xrc.cq);
2587
2588 err_put_pd:
2589 put_pd_read(pd);
2590
2591 err:
2592 put_uobj_write(&obj->uevent.uobject);
2593 return ret;
2594 }
2595
2596 ssize_t ib_uverbs_create_srq(struct ib_uverbs_file *file,
2597 const char __user *buf, int in_len,
2598 int out_len)
2599 {
2600 struct ib_uverbs_create_srq cmd;
2601 struct ib_uverbs_create_xsrq xcmd;
2602 struct ib_uverbs_create_srq_resp resp;
2603 struct ib_udata udata;
2604 int ret;
2605
2606 if (out_len < sizeof resp)
2607 return -ENOSPC;
2608
2609 if (copy_from_user(&cmd, buf, sizeof cmd))
2610 return -EFAULT;
2611
2612 xcmd.response = cmd.response;
2613 xcmd.user_handle = cmd.user_handle;
2614 xcmd.srq_type = IB_SRQT_BASIC;
2615 xcmd.pd_handle = cmd.pd_handle;
2616 xcmd.max_wr = cmd.max_wr;
2617 xcmd.max_sge = cmd.max_sge;
2618 xcmd.srq_limit = cmd.srq_limit;
2619
2620 INIT_UDATA(&udata, buf + sizeof cmd,
2621 (unsigned long) cmd.response + sizeof resp,
2622 in_len - sizeof cmd, out_len - sizeof resp);
2623
2624 ret = __uverbs_create_xsrq(file, &xcmd, &udata);
2625 if (ret)
2626 return ret;
2627
2628 return in_len;
2629 }
2630
2631 ssize_t ib_uverbs_create_xsrq(struct ib_uverbs_file *file,
2632 const char __user *buf, int in_len, int out_len)
2633 {
2634 struct ib_uverbs_create_xsrq cmd;
2635 struct ib_uverbs_create_srq_resp resp;
2636 struct ib_udata udata;
2637 int ret;
2638
2639 if (out_len < sizeof resp)
2640 return -ENOSPC;
2641
2642 if (copy_from_user(&cmd, buf, sizeof cmd))
2643 return -EFAULT;
2644
2645 INIT_UDATA(&udata, buf + sizeof cmd,
2646 (unsigned long) cmd.response + sizeof resp,
2647 in_len - sizeof cmd, out_len - sizeof resp);
2648
2649 ret = __uverbs_create_xsrq(file, &cmd, &udata);
2650 if (ret)
2651 return ret;
2652
2653 return in_len;
2654 }
2655
2656 ssize_t ib_uverbs_modify_srq(struct ib_uverbs_file *file,
2657 const char __user *buf, int in_len,
2658 int out_len)
2659 {
2660 struct ib_uverbs_modify_srq cmd;
2661 struct ib_udata udata;
2662 struct ib_srq *srq;
2663 struct ib_srq_attr attr;
2664 int ret;
2665
2666 if (copy_from_user(&cmd, buf, sizeof cmd))
2667 return -EFAULT;
2668
2669 INIT_UDATA(&udata, buf + sizeof cmd, NULL, in_len - sizeof cmd,
2670 out_len);
2671
2672 srq = idr_read_srq(cmd.srq_handle, file->ucontext);
2673 if (!srq)
2674 return -EINVAL;
2675
2676 attr.max_wr = cmd.max_wr;
2677 attr.srq_limit = cmd.srq_limit;
2678
2679 ret = srq->device->modify_srq(srq, &attr, cmd.attr_mask, &udata);
2680
2681 put_srq_read(srq);
2682
2683 return ret ? ret : in_len;
2684 }
2685
2686 ssize_t ib_uverbs_query_srq(struct ib_uverbs_file *file,
2687 const char __user *buf,
2688 int in_len, int out_len)
2689 {
2690 struct ib_uverbs_query_srq cmd;
2691 struct ib_uverbs_query_srq_resp resp;
2692 struct ib_srq_attr attr;
2693 struct ib_srq *srq;
2694 int ret;
2695
2696 if (out_len < sizeof resp)
2697 return -ENOSPC;
2698
2699 if (copy_from_user(&cmd, buf, sizeof cmd))
2700 return -EFAULT;
2701
2702 srq = idr_read_srq(cmd.srq_handle, file->ucontext);
2703 if (!srq)
2704 return -EINVAL;
2705
2706 ret = ib_query_srq(srq, &attr);
2707
2708 put_srq_read(srq);
2709
2710 if (ret)
2711 return ret;
2712
2713 memset(&resp, 0, sizeof resp);
2714
2715 resp.max_wr = attr.max_wr;
2716 resp.max_sge = attr.max_sge;
2717 resp.srq_limit = attr.srq_limit;
2718
2719 if (copy_to_user((void __user *) (unsigned long) cmd.response,
2720 &resp, sizeof resp))
2721 return -EFAULT;
2722
2723 return in_len;
2724 }
2725
2726 ssize_t ib_uverbs_destroy_srq(struct ib_uverbs_file *file,
2727 const char __user *buf, int in_len,
2728 int out_len)
2729 {
2730 struct ib_uverbs_destroy_srq cmd;
2731 struct ib_uverbs_destroy_srq_resp resp;
2732 struct ib_uobject *uobj;
2733 struct ib_srq *srq;
2734 struct ib_uevent_object *obj;
2735 int ret = -EINVAL;
2736
2737 if (copy_from_user(&cmd, buf, sizeof cmd))
2738 return -EFAULT;
2739
2740 uobj = idr_write_uobj(&ib_uverbs_srq_idr, cmd.srq_handle, file->ucontext);
2741 if (!uobj)
2742 return -EINVAL;
2743 srq = uobj->object;
2744 obj = container_of(uobj, struct ib_uevent_object, uobject);
2745
2746 ret = ib_destroy_srq(srq);
2747 if (!ret)
2748 uobj->live = 0;
2749
2750 put_uobj_write(uobj);
2751
2752 if (ret)
2753 return ret;
2754
2755 idr_remove_uobj(&ib_uverbs_srq_idr, uobj);
2756
2757 mutex_lock(&file->mutex);
2758 list_del(&uobj->list);
2759 mutex_unlock(&file->mutex);
2760
2761 ib_uverbs_release_uevent(file, obj);
2762
2763 memset(&resp, 0, sizeof resp);
2764 resp.events_reported = obj->events_reported;
2765
2766 put_uobj(uobj);
2767
2768 if (copy_to_user((void __user *) (unsigned long) cmd.response,
2769 &resp, sizeof resp))
2770 ret = -EFAULT;
2771
2772 return ret ? ret : in_len;
2773 }
Linux kernel - Deliverables
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