projects / deliverable / linux.git / blob
? search:
summary | shortlog | log | commit | commitdiff | tree
blame | history | raw | HEAD
IB/core: Add timestamp_mask and hca_core_clock to query_device
[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 #include <linux/sched.h>
40
41 #include <asm/uaccess.h>
42
43 #include "uverbs.h"
44 #include "core_priv.h"
45
46 struct uverbs_lock_class {
47 struct lock_class_key key;
48 char name[16];
49 };
50
51 static struct uverbs_lock_class pd_lock_class = { .name = "PD-uobj" };
52 static struct uverbs_lock_class mr_lock_class = { .name = "MR-uobj" };
53 static struct uverbs_lock_class mw_lock_class = { .name = "MW-uobj" };
54 static struct uverbs_lock_class cq_lock_class = { .name = "CQ-uobj" };
55 static struct uverbs_lock_class qp_lock_class = { .name = "QP-uobj" };
56 static struct uverbs_lock_class ah_lock_class = { .name = "AH-uobj" };
57 static struct uverbs_lock_class srq_lock_class = { .name = "SRQ-uobj" };
58 static struct uverbs_lock_class xrcd_lock_class = { .name = "XRCD-uobj" };
59 static struct uverbs_lock_class rule_lock_class = { .name = "RULE-uobj" };
60
61 /*
62 * The ib_uobject locking scheme is as follows:
63 *
64 * - ib_uverbs_idr_lock protects the uverbs idrs themselves, so it
65 * needs to be held during all idr operations. When an object is
66 * looked up, a reference must be taken on the object's kref before
67 * dropping this lock.
68 *
69 * - Each object also has an rwsem. This rwsem must be held for
70 * reading while an operation that uses the object is performed.
71 * For example, while registering an MR, the associated PD's
72 * uobject.mutex must be held for reading. The rwsem must be held
73 * for writing while initializing or destroying an object.
74 *
75 * - In addition, each object has a "live" flag. If this flag is not
76 * set, then lookups of the object will fail even if it is found in
77 * the idr. This handles a reader that blocks and does not acquire
78 * the rwsem until after the object is destroyed. The destroy
79 * operation will set the live flag to 0 and then drop the rwsem;
80 * this will allow the reader to acquire the rwsem, see that the
81 * live flag is 0, and then drop the rwsem and its reference to
82 * object. The underlying storage will not be freed until the last
83 * reference to the object is dropped.
84 */
85
86 static void init_uobj(struct ib_uobject *uobj, u64 user_handle,
87 struct ib_ucontext *context, struct uverbs_lock_class *c)
88 {
89 uobj->user_handle = user_handle;
90 uobj->context = context;
91 kref_init(&uobj->ref);
92 init_rwsem(&uobj->mutex);
93 lockdep_set_class_and_name(&uobj->mutex, &c->key, c->name);
94 uobj->live = 0;
95 }
96
97 static void release_uobj(struct kref *kref)
98 {
99 kfree(container_of(kref, struct ib_uobject, ref));
100 }
101
102 static void put_uobj(struct ib_uobject *uobj)
103 {
104 kref_put(&uobj->ref, release_uobj);
105 }
106
107 static void put_uobj_read(struct ib_uobject *uobj)
108 {
109 up_read(&uobj->mutex);
110 put_uobj(uobj);
111 }
112
113 static void put_uobj_write(struct ib_uobject *uobj)
114 {
115 up_write(&uobj->mutex);
116 put_uobj(uobj);
117 }
118
119 static int idr_add_uobj(struct idr *idr, struct ib_uobject *uobj)
120 {
121 int ret;
122
123 idr_preload(GFP_KERNEL);
124 spin_lock(&ib_uverbs_idr_lock);
125
126 ret = idr_alloc(idr, uobj, 0, 0, GFP_NOWAIT);
127 if (ret >= 0)
128 uobj->id = ret;
129
130 spin_unlock(&ib_uverbs_idr_lock);
131 idr_preload_end();
132
133 return ret < 0 ? ret : 0;
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 #ifdef CONFIG_INFINIBAND_ON_DEMAND_PAGING
293 struct ib_device_attr dev_attr;
294 #endif
295 struct ib_ucontext *ucontext;
296 struct file *filp;
297 int ret;
298
299 if (out_len < sizeof resp)
300 return -ENOSPC;
301
302 if (copy_from_user(&cmd, buf, sizeof cmd))
303 return -EFAULT;
304
305 mutex_lock(&file->mutex);
306
307 if (file->ucontext) {
308 ret = -EINVAL;
309 goto err;
310 }
311
312 INIT_UDATA(&udata, buf + sizeof cmd,
313 (unsigned long) cmd.response + sizeof resp,
314 in_len - sizeof cmd, out_len - sizeof resp);
315
316 ucontext = ibdev->alloc_ucontext(ibdev, &udata);
317 if (IS_ERR(ucontext)) {
318 ret = PTR_ERR(ucontext);
319 goto err;
320 }
321
322 ucontext->device = ibdev;
323 INIT_LIST_HEAD(&ucontext->pd_list);
324 INIT_LIST_HEAD(&ucontext->mr_list);
325 INIT_LIST_HEAD(&ucontext->mw_list);
326 INIT_LIST_HEAD(&ucontext->cq_list);
327 INIT_LIST_HEAD(&ucontext->qp_list);
328 INIT_LIST_HEAD(&ucontext->srq_list);
329 INIT_LIST_HEAD(&ucontext->ah_list);
330 INIT_LIST_HEAD(&ucontext->xrcd_list);
331 INIT_LIST_HEAD(&ucontext->rule_list);
332 rcu_read_lock();
333 ucontext->tgid = get_task_pid(current->group_leader, PIDTYPE_PID);
334 rcu_read_unlock();
335 ucontext->closing = 0;
336
337 #ifdef CONFIG_INFINIBAND_ON_DEMAND_PAGING
338 ucontext->umem_tree = RB_ROOT;
339 init_rwsem(&ucontext->umem_rwsem);
340 ucontext->odp_mrs_count = 0;
341 INIT_LIST_HEAD(&ucontext->no_private_counters);
342
343 ret = ib_query_device(ibdev, &dev_attr);
344 if (ret)
345 goto err_free;
346 if (!(dev_attr.device_cap_flags & IB_DEVICE_ON_DEMAND_PAGING))
347 ucontext->invalidate_range = NULL;
348
349 #endif
350
351 resp.num_comp_vectors = file->device->num_comp_vectors;
352
353 ret = get_unused_fd_flags(O_CLOEXEC);
354 if (ret < 0)
355 goto err_free;
356 resp.async_fd = ret;
357
358 filp = ib_uverbs_alloc_event_file(file, 1);
359 if (IS_ERR(filp)) {
360 ret = PTR_ERR(filp);
361 goto err_fd;
362 }
363
364 if (copy_to_user((void __user *) (unsigned long) cmd.response,
365 &resp, sizeof resp)) {
366 ret = -EFAULT;
367 goto err_file;
368 }
369
370 file->async_file = filp->private_data;
371
372 INIT_IB_EVENT_HANDLER(&file->event_handler, file->device->ib_dev,
373 ib_uverbs_event_handler);
374 ret = ib_register_event_handler(&file->event_handler);
375 if (ret)
376 goto err_file;
377
378 kref_get(&file->async_file->ref);
379 kref_get(&file->ref);
380 file->ucontext = ucontext;
381
382 fd_install(resp.async_fd, filp);
383
384 mutex_unlock(&file->mutex);
385
386 return in_len;
387
388 err_file:
389 fput(filp);
390
391 err_fd:
392 put_unused_fd(resp.async_fd);
393
394 err_free:
395 put_pid(ucontext->tgid);
396 ibdev->dealloc_ucontext(ucontext);
397
398 err:
399 mutex_unlock(&file->mutex);
400 return ret;
401 }
402
403 static void copy_query_dev_fields(struct ib_uverbs_file *file,
404 struct ib_uverbs_query_device_resp *resp,
405 struct ib_device_attr *attr)
406 {
407 resp->fw_ver = attr->fw_ver;
408 resp->node_guid = file->device->ib_dev->node_guid;
409 resp->sys_image_guid = attr->sys_image_guid;
410 resp->max_mr_size = attr->max_mr_size;
411 resp->page_size_cap = attr->page_size_cap;
412 resp->vendor_id = attr->vendor_id;
413 resp->vendor_part_id = attr->vendor_part_id;
414 resp->hw_ver = attr->hw_ver;
415 resp->max_qp = attr->max_qp;
416 resp->max_qp_wr = attr->max_qp_wr;
417 resp->device_cap_flags = attr->device_cap_flags;
418 resp->max_sge = attr->max_sge;
419 resp->max_sge_rd = attr->max_sge_rd;
420 resp->max_cq = attr->max_cq;
421 resp->max_cqe = attr->max_cqe;
422 resp->max_mr = attr->max_mr;
423 resp->max_pd = attr->max_pd;
424 resp->max_qp_rd_atom = attr->max_qp_rd_atom;
425 resp->max_ee_rd_atom = attr->max_ee_rd_atom;
426 resp->max_res_rd_atom = attr->max_res_rd_atom;
427 resp->max_qp_init_rd_atom = attr->max_qp_init_rd_atom;
428 resp->max_ee_init_rd_atom = attr->max_ee_init_rd_atom;
429 resp->atomic_cap = attr->atomic_cap;
430 resp->max_ee = attr->max_ee;
431 resp->max_rdd = attr->max_rdd;
432 resp->max_mw = attr->max_mw;
433 resp->max_raw_ipv6_qp = attr->max_raw_ipv6_qp;
434 resp->max_raw_ethy_qp = attr->max_raw_ethy_qp;
435 resp->max_mcast_grp = attr->max_mcast_grp;
436 resp->max_mcast_qp_attach = attr->max_mcast_qp_attach;
437 resp->max_total_mcast_qp_attach = attr->max_total_mcast_qp_attach;
438 resp->max_ah = attr->max_ah;
439 resp->max_fmr = attr->max_fmr;
440 resp->max_map_per_fmr = attr->max_map_per_fmr;
441 resp->max_srq = attr->max_srq;
442 resp->max_srq_wr = attr->max_srq_wr;
443 resp->max_srq_sge = attr->max_srq_sge;
444 resp->max_pkeys = attr->max_pkeys;
445 resp->local_ca_ack_delay = attr->local_ca_ack_delay;
446 resp->phys_port_cnt = file->device->ib_dev->phys_port_cnt;
447 }
448
449 ssize_t ib_uverbs_query_device(struct ib_uverbs_file *file,
450 const char __user *buf,
451 int in_len, int out_len)
452 {
453 struct ib_uverbs_query_device cmd;
454 struct ib_uverbs_query_device_resp resp;
455 struct ib_device_attr attr;
456 int ret;
457
458 if (out_len < sizeof resp)
459 return -ENOSPC;
460
461 if (copy_from_user(&cmd, buf, sizeof cmd))
462 return -EFAULT;
463
464 ret = ib_query_device(file->device->ib_dev, &attr);
465 if (ret)
466 return ret;
467
468 memset(&resp, 0, sizeof resp);
469 copy_query_dev_fields(file, &resp, &attr);
470
471 if (copy_to_user((void __user *) (unsigned long) cmd.response,
472 &resp, sizeof resp))
473 return -EFAULT;
474
475 return in_len;
476 }
477
478 ssize_t ib_uverbs_query_port(struct ib_uverbs_file *file,
479 const char __user *buf,
480 int in_len, int out_len)
481 {
482 struct ib_uverbs_query_port cmd;
483 struct ib_uverbs_query_port_resp resp;
484 struct ib_port_attr attr;
485 int ret;
486
487 if (out_len < sizeof resp)
488 return -ENOSPC;
489
490 if (copy_from_user(&cmd, buf, sizeof cmd))
491 return -EFAULT;
492
493 ret = ib_query_port(file->device->ib_dev, cmd.port_num, &attr);
494 if (ret)
495 return ret;
496
497 memset(&resp, 0, sizeof resp);
498
499 resp.state = attr.state;
500 resp.max_mtu = attr.max_mtu;
501 resp.active_mtu = attr.active_mtu;
502 resp.gid_tbl_len = attr.gid_tbl_len;
503 resp.port_cap_flags = attr.port_cap_flags;
504 resp.max_msg_sz = attr.max_msg_sz;
505 resp.bad_pkey_cntr = attr.bad_pkey_cntr;
506 resp.qkey_viol_cntr = attr.qkey_viol_cntr;
507 resp.pkey_tbl_len = attr.pkey_tbl_len;
508 resp.lid = attr.lid;
509 resp.sm_lid = attr.sm_lid;
510 resp.lmc = attr.lmc;
511 resp.max_vl_num = attr.max_vl_num;
512 resp.sm_sl = attr.sm_sl;
513 resp.subnet_timeout = attr.subnet_timeout;
514 resp.init_type_reply = attr.init_type_reply;
515 resp.active_width = attr.active_width;
516 resp.active_speed = attr.active_speed;
517 resp.phys_state = attr.phys_state;
518 resp.link_layer = rdma_port_get_link_layer(file->device->ib_dev,
519 cmd.port_num);
520
521 if (copy_to_user((void __user *) (unsigned long) cmd.response,
522 &resp, sizeof resp))
523 return -EFAULT;
524
525 return in_len;
526 }
527
528 ssize_t ib_uverbs_alloc_pd(struct ib_uverbs_file *file,
529 const char __user *buf,
530 int in_len, int out_len)
531 {
532 struct ib_uverbs_alloc_pd cmd;
533 struct ib_uverbs_alloc_pd_resp resp;
534 struct ib_udata udata;
535 struct ib_uobject *uobj;
536 struct ib_pd *pd;
537 int ret;
538
539 if (out_len < sizeof resp)
540 return -ENOSPC;
541
542 if (copy_from_user(&cmd, buf, sizeof cmd))
543 return -EFAULT;
544
545 INIT_UDATA(&udata, buf + sizeof cmd,
546 (unsigned long) cmd.response + sizeof resp,
547 in_len - sizeof cmd, out_len - sizeof resp);
548
549 uobj = kmalloc(sizeof *uobj, GFP_KERNEL);
550 if (!uobj)
551 return -ENOMEM;
552
553 init_uobj(uobj, 0, file->ucontext, &pd_lock_class);
554 down_write(&uobj->mutex);
555
556 pd = file->device->ib_dev->alloc_pd(file->device->ib_dev,
557 file->ucontext, &udata);
558 if (IS_ERR(pd)) {
559 ret = PTR_ERR(pd);
560 goto err;
561 }
562
563 pd->device = file->device->ib_dev;
564 pd->uobject = uobj;
565 atomic_set(&pd->usecnt, 0);
566
567 uobj->object = pd;
568 ret = idr_add_uobj(&ib_uverbs_pd_idr, uobj);
569 if (ret)
570 goto err_idr;
571
572 memset(&resp, 0, sizeof resp);
573 resp.pd_handle = uobj->id;
574
575 if (copy_to_user((void __user *) (unsigned long) cmd.response,
576 &resp, sizeof resp)) {
577 ret = -EFAULT;
578 goto err_copy;
579 }
580
581 mutex_lock(&file->mutex);
582 list_add_tail(&uobj->list, &file->ucontext->pd_list);
583 mutex_unlock(&file->mutex);
584
585 uobj->live = 1;
586
587 up_write(&uobj->mutex);
588
589 return in_len;
590
591 err_copy:
592 idr_remove_uobj(&ib_uverbs_pd_idr, uobj);
593
594 err_idr:
595 ib_dealloc_pd(pd);
596
597 err:
598 put_uobj_write(uobj);
599 return ret;
600 }
601
602 ssize_t ib_uverbs_dealloc_pd(struct ib_uverbs_file *file,
603 const char __user *buf,
604 int in_len, int out_len)
605 {
606 struct ib_uverbs_dealloc_pd cmd;
607 struct ib_uobject *uobj;
608 int ret;
609
610 if (copy_from_user(&cmd, buf, sizeof cmd))
611 return -EFAULT;
612
613 uobj = idr_write_uobj(&ib_uverbs_pd_idr, cmd.pd_handle, file->ucontext);
614 if (!uobj)
615 return -EINVAL;
616
617 ret = ib_dealloc_pd(uobj->object);
618 if (!ret)
619 uobj->live = 0;
620
621 put_uobj_write(uobj);
622
623 if (ret)
624 return ret;
625
626 idr_remove_uobj(&ib_uverbs_pd_idr, uobj);
627
628 mutex_lock(&file->mutex);
629 list_del(&uobj->list);
630 mutex_unlock(&file->mutex);
631
632 put_uobj(uobj);
633
634 return in_len;
635 }
636
637 struct xrcd_table_entry {
638 struct rb_node node;
639 struct ib_xrcd *xrcd;
640 struct inode *inode;
641 };
642
643 static int xrcd_table_insert(struct ib_uverbs_device *dev,
644 struct inode *inode,
645 struct ib_xrcd *xrcd)
646 {
647 struct xrcd_table_entry *entry, *scan;
648 struct rb_node **p = &dev->xrcd_tree.rb_node;
649 struct rb_node *parent = NULL;
650
651 entry = kmalloc(sizeof *entry, GFP_KERNEL);
652 if (!entry)
653 return -ENOMEM;
654
655 entry->xrcd = xrcd;
656 entry->inode = inode;
657
658 while (*p) {
659 parent = *p;
660 scan = rb_entry(parent, struct xrcd_table_entry, node);
661
662 if (inode < scan->inode) {
663 p = &(*p)->rb_left;
664 } else if (inode > scan->inode) {
665 p = &(*p)->rb_right;
666 } else {
667 kfree(entry);
668 return -EEXIST;
669 }
670 }
671
672 rb_link_node(&entry->node, parent, p);
673 rb_insert_color(&entry->node, &dev->xrcd_tree);
674 igrab(inode);
675 return 0;
676 }
677
678 static struct xrcd_table_entry *xrcd_table_search(struct ib_uverbs_device *dev,
679 struct inode *inode)
680 {
681 struct xrcd_table_entry *entry;
682 struct rb_node *p = dev->xrcd_tree.rb_node;
683
684 while (p) {
685 entry = rb_entry(p, struct xrcd_table_entry, node);
686
687 if (inode < entry->inode)
688 p = p->rb_left;
689 else if (inode > entry->inode)
690 p = p->rb_right;
691 else
692 return entry;
693 }
694
695 return NULL;
696 }
697
698 static struct ib_xrcd *find_xrcd(struct ib_uverbs_device *dev, struct inode *inode)
699 {
700 struct xrcd_table_entry *entry;
701
702 entry = xrcd_table_search(dev, inode);
703 if (!entry)
704 return NULL;
705
706 return entry->xrcd;
707 }
708
709 static void xrcd_table_delete(struct ib_uverbs_device *dev,
710 struct inode *inode)
711 {
712 struct xrcd_table_entry *entry;
713
714 entry = xrcd_table_search(dev, inode);
715 if (entry) {
716 iput(inode);
717 rb_erase(&entry->node, &dev->xrcd_tree);
718 kfree(entry);
719 }
720 }
721
722 ssize_t ib_uverbs_open_xrcd(struct ib_uverbs_file *file,
723 const char __user *buf, int in_len,
724 int out_len)
725 {
726 struct ib_uverbs_open_xrcd cmd;
727 struct ib_uverbs_open_xrcd_resp resp;
728 struct ib_udata udata;
729 struct ib_uxrcd_object *obj;
730 struct ib_xrcd *xrcd = NULL;
731 struct fd f = {NULL, 0};
732 struct inode *inode = NULL;
733 int ret = 0;
734 int new_xrcd = 0;
735
736 if (out_len < sizeof resp)
737 return -ENOSPC;
738
739 if (copy_from_user(&cmd, buf, sizeof cmd))
740 return -EFAULT;
741
742 INIT_UDATA(&udata, buf + sizeof cmd,
743 (unsigned long) cmd.response + sizeof resp,
744 in_len - sizeof cmd, out_len - sizeof resp);
745
746 mutex_lock(&file->device->xrcd_tree_mutex);
747
748 if (cmd.fd != -1) {
749 /* search for file descriptor */
750 f = fdget(cmd.fd);
751 if (!f.file) {
752 ret = -EBADF;
753 goto err_tree_mutex_unlock;
754 }
755
756 inode = file_inode(f.file);
757 xrcd = find_xrcd(file->device, inode);
758 if (!xrcd && !(cmd.oflags & O_CREAT)) {
759 /* no file descriptor. Need CREATE flag */
760 ret = -EAGAIN;
761 goto err_tree_mutex_unlock;
762 }
763
764 if (xrcd && cmd.oflags & O_EXCL) {
765 ret = -EINVAL;
766 goto err_tree_mutex_unlock;
767 }
768 }
769
770 obj = kmalloc(sizeof *obj, GFP_KERNEL);
771 if (!obj) {
772 ret = -ENOMEM;
773 goto err_tree_mutex_unlock;
774 }
775
776 init_uobj(&obj->uobject, 0, file->ucontext, &xrcd_lock_class);
777
778 down_write(&obj->uobject.mutex);
779
780 if (!xrcd) {
781 xrcd = file->device->ib_dev->alloc_xrcd(file->device->ib_dev,
782 file->ucontext, &udata);
783 if (IS_ERR(xrcd)) {
784 ret = PTR_ERR(xrcd);
785 goto err;
786 }
787
788 xrcd->inode = inode;
789 xrcd->device = file->device->ib_dev;
790 atomic_set(&xrcd->usecnt, 0);
791 mutex_init(&xrcd->tgt_qp_mutex);
792 INIT_LIST_HEAD(&xrcd->tgt_qp_list);
793 new_xrcd = 1;
794 }
795
796 atomic_set(&obj->refcnt, 0);
797 obj->uobject.object = xrcd;
798 ret = idr_add_uobj(&ib_uverbs_xrcd_idr, &obj->uobject);
799 if (ret)
800 goto err_idr;
801
802 memset(&resp, 0, sizeof resp);
803 resp.xrcd_handle = obj->uobject.id;
804
805 if (inode) {
806 if (new_xrcd) {
807 /* create new inode/xrcd table entry */
808 ret = xrcd_table_insert(file->device, inode, xrcd);
809 if (ret)
810 goto err_insert_xrcd;
811 }
812 atomic_inc(&xrcd->usecnt);
813 }
814
815 if (copy_to_user((void __user *) (unsigned long) cmd.response,
816 &resp, sizeof resp)) {
817 ret = -EFAULT;
818 goto err_copy;
819 }
820
821 if (f.file)
822 fdput(f);
823
824 mutex_lock(&file->mutex);
825 list_add_tail(&obj->uobject.list, &file->ucontext->xrcd_list);
826 mutex_unlock(&file->mutex);
827
828 obj->uobject.live = 1;
829 up_write(&obj->uobject.mutex);
830
831 mutex_unlock(&file->device->xrcd_tree_mutex);
832 return in_len;
833
834 err_copy:
835 if (inode) {
836 if (new_xrcd)
837 xrcd_table_delete(file->device, inode);
838 atomic_dec(&xrcd->usecnt);
839 }
840
841 err_insert_xrcd:
842 idr_remove_uobj(&ib_uverbs_xrcd_idr, &obj->uobject);
843
844 err_idr:
845 ib_dealloc_xrcd(xrcd);
846
847 err:
848 put_uobj_write(&obj->uobject);
849
850 err_tree_mutex_unlock:
851 if (f.file)
852 fdput(f);
853
854 mutex_unlock(&file->device->xrcd_tree_mutex);
855
856 return ret;
857 }
858
859 ssize_t ib_uverbs_close_xrcd(struct ib_uverbs_file *file,
860 const char __user *buf, int in_len,
861 int out_len)
862 {
863 struct ib_uverbs_close_xrcd cmd;
864 struct ib_uobject *uobj;
865 struct ib_xrcd *xrcd = NULL;
866 struct inode *inode = NULL;
867 struct ib_uxrcd_object *obj;
868 int live;
869 int ret = 0;
870
871 if (copy_from_user(&cmd, buf, sizeof cmd))
872 return -EFAULT;
873
874 mutex_lock(&file->device->xrcd_tree_mutex);
875 uobj = idr_write_uobj(&ib_uverbs_xrcd_idr, cmd.xrcd_handle, file->ucontext);
876 if (!uobj) {
877 ret = -EINVAL;
878 goto out;
879 }
880
881 xrcd = uobj->object;
882 inode = xrcd->inode;
883 obj = container_of(uobj, struct ib_uxrcd_object, uobject);
884 if (atomic_read(&obj->refcnt)) {
885 put_uobj_write(uobj);
886 ret = -EBUSY;
887 goto out;
888 }
889
890 if (!inode || atomic_dec_and_test(&xrcd->usecnt)) {
891 ret = ib_dealloc_xrcd(uobj->object);
892 if (!ret)
893 uobj->live = 0;
894 }
895
896 live = uobj->live;
897 if (inode && ret)
898 atomic_inc(&xrcd->usecnt);
899
900 put_uobj_write(uobj);
901
902 if (ret)
903 goto out;
904
905 if (inode && !live)
906 xrcd_table_delete(file->device, inode);
907
908 idr_remove_uobj(&ib_uverbs_xrcd_idr, uobj);
909 mutex_lock(&file->mutex);
910 list_del(&uobj->list);
911 mutex_unlock(&file->mutex);
912
913 put_uobj(uobj);
914 ret = in_len;
915
916 out:
917 mutex_unlock(&file->device->xrcd_tree_mutex);
918 return ret;
919 }
920
921 void ib_uverbs_dealloc_xrcd(struct ib_uverbs_device *dev,
922 struct ib_xrcd *xrcd)
923 {
924 struct inode *inode;
925
926 inode = xrcd->inode;
927 if (inode && !atomic_dec_and_test(&xrcd->usecnt))
928 return;
929
930 ib_dealloc_xrcd(xrcd);
931
932 if (inode)
933 xrcd_table_delete(dev, inode);
934 }
935
936 ssize_t ib_uverbs_reg_mr(struct ib_uverbs_file *file,
937 const char __user *buf, int in_len,
938 int out_len)
939 {
940 struct ib_uverbs_reg_mr cmd;
941 struct ib_uverbs_reg_mr_resp resp;
942 struct ib_udata udata;
943 struct ib_uobject *uobj;
944 struct ib_pd *pd;
945 struct ib_mr *mr;
946 int ret;
947
948 if (out_len < sizeof resp)
949 return -ENOSPC;
950
951 if (copy_from_user(&cmd, buf, sizeof cmd))
952 return -EFAULT;
953
954 INIT_UDATA(&udata, buf + sizeof cmd,
955 (unsigned long) cmd.response + sizeof resp,
956 in_len - sizeof cmd, out_len - sizeof resp);
957
958 if ((cmd.start & ~PAGE_MASK) != (cmd.hca_va & ~PAGE_MASK))
959 return -EINVAL;
960
961 ret = ib_check_mr_access(cmd.access_flags);
962 if (ret)
963 return ret;
964
965 uobj = kmalloc(sizeof *uobj, GFP_KERNEL);
966 if (!uobj)
967 return -ENOMEM;
968
969 init_uobj(uobj, 0, file->ucontext, &mr_lock_class);
970 down_write(&uobj->mutex);
971
972 pd = idr_read_pd(cmd.pd_handle, file->ucontext);
973 if (!pd) {
974 ret = -EINVAL;
975 goto err_free;
976 }
977
978 if (cmd.access_flags & IB_ACCESS_ON_DEMAND) {
979 struct ib_device_attr attr;
980
981 ret = ib_query_device(pd->device, &attr);
982 if (ret || !(attr.device_cap_flags &
983 IB_DEVICE_ON_DEMAND_PAGING)) {
984 pr_debug("ODP support not available\n");
985 ret = -EINVAL;
986 goto err_put;
987 }
988 }
989
990 mr = pd->device->reg_user_mr(pd, cmd.start, cmd.length, cmd.hca_va,
991 cmd.access_flags, &udata);
992 if (IS_ERR(mr)) {
993 ret = PTR_ERR(mr);
994 goto err_put;
995 }
996
997 mr->device = pd->device;
998 mr->pd = pd;
999 mr->uobject = uobj;
1000 atomic_inc(&pd->usecnt);
1001 atomic_set(&mr->usecnt, 0);
1002
1003 uobj->object = mr;
1004 ret = idr_add_uobj(&ib_uverbs_mr_idr, uobj);
1005 if (ret)
1006 goto err_unreg;
1007
1008 memset(&resp, 0, sizeof resp);
1009 resp.lkey = mr->lkey;
1010 resp.rkey = mr->rkey;
1011 resp.mr_handle = uobj->id;
1012
1013 if (copy_to_user((void __user *) (unsigned long) cmd.response,
1014 &resp, sizeof resp)) {
1015 ret = -EFAULT;
1016 goto err_copy;
1017 }
1018
1019 put_pd_read(pd);
1020
1021 mutex_lock(&file->mutex);
1022 list_add_tail(&uobj->list, &file->ucontext->mr_list);
1023 mutex_unlock(&file->mutex);
1024
1025 uobj->live = 1;
1026
1027 up_write(&uobj->mutex);
1028
1029 return in_len;
1030
1031 err_copy:
1032 idr_remove_uobj(&ib_uverbs_mr_idr, uobj);
1033
1034 err_unreg:
1035 ib_dereg_mr(mr);
1036
1037 err_put:
1038 put_pd_read(pd);
1039
1040 err_free:
1041 put_uobj_write(uobj);
1042 return ret;
1043 }
1044
1045 ssize_t ib_uverbs_rereg_mr(struct ib_uverbs_file *file,
1046 const char __user *buf, int in_len,
1047 int out_len)
1048 {
1049 struct ib_uverbs_rereg_mr cmd;
1050 struct ib_uverbs_rereg_mr_resp resp;
1051 struct ib_udata udata;
1052 struct ib_pd *pd = NULL;
1053 struct ib_mr *mr;
1054 struct ib_pd *old_pd;
1055 int ret;
1056 struct ib_uobject *uobj;
1057
1058 if (out_len < sizeof(resp))
1059 return -ENOSPC;
1060
1061 if (copy_from_user(&cmd, buf, sizeof(cmd)))
1062 return -EFAULT;
1063
1064 INIT_UDATA(&udata, buf + sizeof(cmd),
1065 (unsigned long) cmd.response + sizeof(resp),
1066 in_len - sizeof(cmd), out_len - sizeof(resp));
1067
1068 if (cmd.flags & ~IB_MR_REREG_SUPPORTED || !cmd.flags)
1069 return -EINVAL;
1070
1071 if ((cmd.flags & IB_MR_REREG_TRANS) &&
1072 (!cmd.start || !cmd.hca_va || 0 >= cmd.length ||
1073 (cmd.start & ~PAGE_MASK) != (cmd.hca_va & ~PAGE_MASK)))
1074 return -EINVAL;
1075
1076 uobj = idr_write_uobj(&ib_uverbs_mr_idr, cmd.mr_handle,
1077 file->ucontext);
1078
1079 if (!uobj)
1080 return -EINVAL;
1081
1082 mr = uobj->object;
1083
1084 if (cmd.flags & IB_MR_REREG_ACCESS) {
1085 ret = ib_check_mr_access(cmd.access_flags);
1086 if (ret)
1087 goto put_uobjs;
1088 }
1089
1090 if (cmd.flags & IB_MR_REREG_PD) {
1091 pd = idr_read_pd(cmd.pd_handle, file->ucontext);
1092 if (!pd) {
1093 ret = -EINVAL;
1094 goto put_uobjs;
1095 }
1096 }
1097
1098 if (atomic_read(&mr->usecnt)) {
1099 ret = -EBUSY;
1100 goto put_uobj_pd;
1101 }
1102
1103 old_pd = mr->pd;
1104 ret = mr->device->rereg_user_mr(mr, cmd.flags, cmd.start,
1105 cmd.length, cmd.hca_va,
1106 cmd.access_flags, pd, &udata);
1107 if (!ret) {
1108 if (cmd.flags & IB_MR_REREG_PD) {
1109 atomic_inc(&pd->usecnt);
1110 mr->pd = pd;
1111 atomic_dec(&old_pd->usecnt);
1112 }
1113 } else {
1114 goto put_uobj_pd;
1115 }
1116
1117 memset(&resp, 0, sizeof(resp));
1118 resp.lkey = mr->lkey;
1119 resp.rkey = mr->rkey;
1120
1121 if (copy_to_user((void __user *)(unsigned long)cmd.response,
1122 &resp, sizeof(resp)))
1123 ret = -EFAULT;
1124 else
1125 ret = in_len;
1126
1127 put_uobj_pd:
1128 if (cmd.flags & IB_MR_REREG_PD)
1129 put_pd_read(pd);
1130
1131 put_uobjs:
1132
1133 put_uobj_write(mr->uobject);
1134
1135 return ret;
1136 }
1137
1138 ssize_t ib_uverbs_dereg_mr(struct ib_uverbs_file *file,
1139 const char __user *buf, int in_len,
1140 int out_len)
1141 {
1142 struct ib_uverbs_dereg_mr cmd;
1143 struct ib_mr *mr;
1144 struct ib_uobject *uobj;
1145 int ret = -EINVAL;
1146
1147 if (copy_from_user(&cmd, buf, sizeof cmd))
1148 return -EFAULT;
1149
1150 uobj = idr_write_uobj(&ib_uverbs_mr_idr, cmd.mr_handle, file->ucontext);
1151 if (!uobj)
1152 return -EINVAL;
1153
1154 mr = uobj->object;
1155
1156 ret = ib_dereg_mr(mr);
1157 if (!ret)
1158 uobj->live = 0;
1159
1160 put_uobj_write(uobj);
1161
1162 if (ret)
1163 return ret;
1164
1165 idr_remove_uobj(&ib_uverbs_mr_idr, uobj);
1166
1167 mutex_lock(&file->mutex);
1168 list_del(&uobj->list);
1169 mutex_unlock(&file->mutex);
1170
1171 put_uobj(uobj);
1172
1173 return in_len;
1174 }
1175
1176 ssize_t ib_uverbs_alloc_mw(struct ib_uverbs_file *file,
1177 const char __user *buf, int in_len,
1178 int out_len)
1179 {
1180 struct ib_uverbs_alloc_mw cmd;
1181 struct ib_uverbs_alloc_mw_resp resp;
1182 struct ib_uobject *uobj;
1183 struct ib_pd *pd;
1184 struct ib_mw *mw;
1185 int ret;
1186
1187 if (out_len < sizeof(resp))
1188 return -ENOSPC;
1189
1190 if (copy_from_user(&cmd, buf, sizeof(cmd)))
1191 return -EFAULT;
1192
1193 uobj = kmalloc(sizeof(*uobj), GFP_KERNEL);
1194 if (!uobj)
1195 return -ENOMEM;
1196
1197 init_uobj(uobj, 0, file->ucontext, &mw_lock_class);
1198 down_write(&uobj->mutex);
1199
1200 pd = idr_read_pd(cmd.pd_handle, file->ucontext);
1201 if (!pd) {
1202 ret = -EINVAL;
1203 goto err_free;
1204 }
1205
1206 mw = pd->device->alloc_mw(pd, cmd.mw_type);
1207 if (IS_ERR(mw)) {
1208 ret = PTR_ERR(mw);
1209 goto err_put;
1210 }
1211
1212 mw->device = pd->device;
1213 mw->pd = pd;
1214 mw->uobject = uobj;
1215 atomic_inc(&pd->usecnt);
1216
1217 uobj->object = mw;
1218 ret = idr_add_uobj(&ib_uverbs_mw_idr, uobj);
1219 if (ret)
1220 goto err_unalloc;
1221
1222 memset(&resp, 0, sizeof(resp));
1223 resp.rkey = mw->rkey;
1224 resp.mw_handle = uobj->id;
1225
1226 if (copy_to_user((void __user *)(unsigned long)cmd.response,
1227 &resp, sizeof(resp))) {
1228 ret = -EFAULT;
1229 goto err_copy;
1230 }
1231
1232 put_pd_read(pd);
1233
1234 mutex_lock(&file->mutex);
1235 list_add_tail(&uobj->list, &file->ucontext->mw_list);
1236 mutex_unlock(&file->mutex);
1237
1238 uobj->live = 1;
1239
1240 up_write(&uobj->mutex);
1241
1242 return in_len;
1243
1244 err_copy:
1245 idr_remove_uobj(&ib_uverbs_mw_idr, uobj);
1246
1247 err_unalloc:
1248 ib_dealloc_mw(mw);
1249
1250 err_put:
1251 put_pd_read(pd);
1252
1253 err_free:
1254 put_uobj_write(uobj);
1255 return ret;
1256 }
1257
1258 ssize_t ib_uverbs_dealloc_mw(struct ib_uverbs_file *file,
1259 const char __user *buf, int in_len,
1260 int out_len)
1261 {
1262 struct ib_uverbs_dealloc_mw cmd;
1263 struct ib_mw *mw;
1264 struct ib_uobject *uobj;
1265 int ret = -EINVAL;
1266
1267 if (copy_from_user(&cmd, buf, sizeof(cmd)))
1268 return -EFAULT;
1269
1270 uobj = idr_write_uobj(&ib_uverbs_mw_idr, cmd.mw_handle, file->ucontext);
1271 if (!uobj)
1272 return -EINVAL;
1273
1274 mw = uobj->object;
1275
1276 ret = ib_dealloc_mw(mw);
1277 if (!ret)
1278 uobj->live = 0;
1279
1280 put_uobj_write(uobj);
1281
1282 if (ret)
1283 return ret;
1284
1285 idr_remove_uobj(&ib_uverbs_mw_idr, uobj);
1286
1287 mutex_lock(&file->mutex);
1288 list_del(&uobj->list);
1289 mutex_unlock(&file->mutex);
1290
1291 put_uobj(uobj);
1292
1293 return in_len;
1294 }
1295
1296 ssize_t ib_uverbs_create_comp_channel(struct ib_uverbs_file *file,
1297 const char __user *buf, int in_len,
1298 int out_len)
1299 {
1300 struct ib_uverbs_create_comp_channel cmd;
1301 struct ib_uverbs_create_comp_channel_resp resp;
1302 struct file *filp;
1303 int ret;
1304
1305 if (out_len < sizeof resp)
1306 return -ENOSPC;
1307
1308 if (copy_from_user(&cmd, buf, sizeof cmd))
1309 return -EFAULT;
1310
1311 ret = get_unused_fd_flags(O_CLOEXEC);
1312 if (ret < 0)
1313 return ret;
1314 resp.fd = ret;
1315
1316 filp = ib_uverbs_alloc_event_file(file, 0);
1317 if (IS_ERR(filp)) {
1318 put_unused_fd(resp.fd);
1319 return PTR_ERR(filp);
1320 }
1321
1322 if (copy_to_user((void __user *) (unsigned long) cmd.response,
1323 &resp, sizeof resp)) {
1324 put_unused_fd(resp.fd);
1325 fput(filp);
1326 return -EFAULT;
1327 }
1328
1329 fd_install(resp.fd, filp);
1330 return in_len;
1331 }
1332
1333 static struct ib_ucq_object *create_cq(struct ib_uverbs_file *file,
1334 struct ib_udata *ucore,
1335 struct ib_udata *uhw,
1336 struct ib_uverbs_ex_create_cq *cmd,
1337 size_t cmd_sz,
1338 int (*cb)(struct ib_uverbs_file *file,
1339 struct ib_ucq_object *obj,
1340 struct ib_uverbs_ex_create_cq_resp *resp,
1341 struct ib_udata *udata,
1342 void *context),
1343 void *context)
1344 {
1345 struct ib_ucq_object *obj;
1346 struct ib_uverbs_event_file *ev_file = NULL;
1347 struct ib_cq *cq;
1348 int ret;
1349 struct ib_uverbs_ex_create_cq_resp resp;
1350 struct ib_cq_init_attr attr = {};
1351
1352 if (cmd->comp_vector >= file->device->num_comp_vectors)
1353 return ERR_PTR(-EINVAL);
1354
1355 obj = kmalloc(sizeof *obj, GFP_KERNEL);
1356 if (!obj)
1357 return ERR_PTR(-ENOMEM);
1358
1359 init_uobj(&obj->uobject, cmd->user_handle, file->ucontext, &cq_lock_class);
1360 down_write(&obj->uobject.mutex);
1361
1362 if (cmd->comp_channel >= 0) {
1363 ev_file = ib_uverbs_lookup_comp_file(cmd->comp_channel);
1364 if (!ev_file) {
1365 ret = -EINVAL;
1366 goto err;
1367 }
1368 }
1369
1370 obj->uverbs_file = file;
1371 obj->comp_events_reported = 0;
1372 obj->async_events_reported = 0;
1373 INIT_LIST_HEAD(&obj->comp_list);
1374 INIT_LIST_HEAD(&obj->async_list);
1375
1376 attr.cqe = cmd->cqe;
1377 attr.comp_vector = cmd->comp_vector;
1378
1379 if (cmd_sz > offsetof(typeof(*cmd), flags) + sizeof(cmd->flags))
1380 attr.flags = cmd->flags;
1381
1382 cq = file->device->ib_dev->create_cq(file->device->ib_dev, &attr,
1383 file->ucontext, uhw);
1384 if (IS_ERR(cq)) {
1385 ret = PTR_ERR(cq);
1386 goto err_file;
1387 }
1388
1389 cq->device = file->device->ib_dev;
1390 cq->uobject = &obj->uobject;
1391 cq->comp_handler = ib_uverbs_comp_handler;
1392 cq->event_handler = ib_uverbs_cq_event_handler;
1393 cq->cq_context = ev_file;
1394 atomic_set(&cq->usecnt, 0);
1395
1396 obj->uobject.object = cq;
1397 ret = idr_add_uobj(&ib_uverbs_cq_idr, &obj->uobject);
1398 if (ret)
1399 goto err_free;
1400
1401 memset(&resp, 0, sizeof resp);
1402 resp.base.cq_handle = obj->uobject.id;
1403 resp.base.cqe = cq->cqe;
1404
1405 resp.response_length = offsetof(typeof(resp), response_length) +
1406 sizeof(resp.response_length);
1407
1408 ret = cb(file, obj, &resp, ucore, context);
1409 if (ret)
1410 goto err_cb;
1411
1412 mutex_lock(&file->mutex);
1413 list_add_tail(&obj->uobject.list, &file->ucontext->cq_list);
1414 mutex_unlock(&file->mutex);
1415
1416 obj->uobject.live = 1;
1417
1418 up_write(&obj->uobject.mutex);
1419
1420 return obj;
1421
1422 err_cb:
1423 idr_remove_uobj(&ib_uverbs_cq_idr, &obj->uobject);
1424
1425 err_free:
1426 ib_destroy_cq(cq);
1427
1428 err_file:
1429 if (ev_file)
1430 ib_uverbs_release_ucq(file, ev_file, obj);
1431
1432 err:
1433 put_uobj_write(&obj->uobject);
1434
1435 return ERR_PTR(ret);
1436 }
1437
1438 static int ib_uverbs_create_cq_cb(struct ib_uverbs_file *file,
1439 struct ib_ucq_object *obj,
1440 struct ib_uverbs_ex_create_cq_resp *resp,
1441 struct ib_udata *ucore, void *context)
1442 {
1443 if (ib_copy_to_udata(ucore, &resp->base, sizeof(resp->base)))
1444 return -EFAULT;
1445
1446 return 0;
1447 }
1448
1449 ssize_t ib_uverbs_create_cq(struct ib_uverbs_file *file,
1450 const char __user *buf, int in_len,
1451 int out_len)
1452 {
1453 struct ib_uverbs_create_cq cmd;
1454 struct ib_uverbs_ex_create_cq cmd_ex;
1455 struct ib_uverbs_create_cq_resp resp;
1456 struct ib_udata ucore;
1457 struct ib_udata uhw;
1458 struct ib_ucq_object *obj;
1459
1460 if (out_len < sizeof(resp))
1461 return -ENOSPC;
1462
1463 if (copy_from_user(&cmd, buf, sizeof(cmd)))
1464 return -EFAULT;
1465
1466 INIT_UDATA(&ucore, buf, cmd.response, sizeof(cmd), sizeof(resp));
1467
1468 INIT_UDATA(&uhw, buf + sizeof(cmd),
1469 (unsigned long)cmd.response + sizeof(resp),
1470 in_len - sizeof(cmd), out_len - sizeof(resp));
1471
1472 memset(&cmd_ex, 0, sizeof(cmd_ex));
1473 cmd_ex.user_handle = cmd.user_handle;
1474 cmd_ex.cqe = cmd.cqe;
1475 cmd_ex.comp_vector = cmd.comp_vector;
1476 cmd_ex.comp_channel = cmd.comp_channel;
1477
1478 obj = create_cq(file, &ucore, &uhw, &cmd_ex,
1479 offsetof(typeof(cmd_ex), comp_channel) +
1480 sizeof(cmd.comp_channel), ib_uverbs_create_cq_cb,
1481 NULL);
1482
1483 if (IS_ERR(obj))
1484 return PTR_ERR(obj);
1485
1486 return in_len;
1487 }
1488
1489 static int ib_uverbs_ex_create_cq_cb(struct ib_uverbs_file *file,
1490 struct ib_ucq_object *obj,
1491 struct ib_uverbs_ex_create_cq_resp *resp,
1492 struct ib_udata *ucore, void *context)
1493 {
1494 if (ib_copy_to_udata(ucore, resp, resp->response_length))
1495 return -EFAULT;
1496
1497 return 0;
1498 }
1499
1500 int ib_uverbs_ex_create_cq(struct ib_uverbs_file *file,
1501 struct ib_udata *ucore,
1502 struct ib_udata *uhw)
1503 {
1504 struct ib_uverbs_ex_create_cq_resp resp;
1505 struct ib_uverbs_ex_create_cq cmd;
1506 struct ib_ucq_object *obj;
1507 int err;
1508
1509 if (ucore->inlen < sizeof(cmd))
1510 return -EINVAL;
1511
1512 err = ib_copy_from_udata(&cmd, ucore, sizeof(cmd));
1513 if (err)
1514 return err;
1515
1516 if (cmd.comp_mask)
1517 return -EINVAL;
1518
1519 if (cmd.reserved)
1520 return -EINVAL;
1521
1522 if (ucore->outlen < (offsetof(typeof(resp), response_length) +
1523 sizeof(resp.response_length)))
1524 return -ENOSPC;
1525
1526 obj = create_cq(file, ucore, uhw, &cmd,
1527 min(ucore->inlen, sizeof(cmd)),
1528 ib_uverbs_ex_create_cq_cb, NULL);
1529
1530 if (IS_ERR(obj))
1531 return PTR_ERR(obj);
1532
1533 return 0;
1534 }
1535
1536 ssize_t ib_uverbs_resize_cq(struct ib_uverbs_file *file,
1537 const char __user *buf, int in_len,
1538 int out_len)
1539 {
1540 struct ib_uverbs_resize_cq cmd;
1541 struct ib_uverbs_resize_cq_resp resp;
1542 struct ib_udata udata;
1543 struct ib_cq *cq;
1544 int ret = -EINVAL;
1545
1546 if (copy_from_user(&cmd, buf, sizeof cmd))
1547 return -EFAULT;
1548
1549 INIT_UDATA(&udata, buf + sizeof cmd,
1550 (unsigned long) cmd.response + sizeof resp,
1551 in_len - sizeof cmd, out_len - sizeof resp);
1552
1553 cq = idr_read_cq(cmd.cq_handle, file->ucontext, 0);
1554 if (!cq)
1555 return -EINVAL;
1556
1557 ret = cq->device->resize_cq(cq, cmd.cqe, &udata);
1558 if (ret)
1559 goto out;
1560
1561 resp.cqe = cq->cqe;
1562
1563 if (copy_to_user((void __user *) (unsigned long) cmd.response,
1564 &resp, sizeof resp.cqe))
1565 ret = -EFAULT;
1566
1567 out:
1568 put_cq_read(cq);
1569
1570 return ret ? ret : in_len;
1571 }
1572
1573 static int copy_wc_to_user(void __user *dest, struct ib_wc *wc)
1574 {
1575 struct ib_uverbs_wc tmp;
1576
1577 tmp.wr_id = wc->wr_id;
1578 tmp.status = wc->status;
1579 tmp.opcode = wc->opcode;
1580 tmp.vendor_err = wc->vendor_err;
1581 tmp.byte_len = wc->byte_len;
1582 tmp.ex.imm_data = (__u32 __force) wc->ex.imm_data;
1583 tmp.qp_num = wc->qp->qp_num;
1584 tmp.src_qp = wc->src_qp;
1585 tmp.wc_flags = wc->wc_flags;
1586 tmp.pkey_index = wc->pkey_index;
1587 tmp.slid = wc->slid;
1588 tmp.sl = wc->sl;
1589 tmp.dlid_path_bits = wc->dlid_path_bits;
1590 tmp.port_num = wc->port_num;
1591 tmp.reserved = 0;
1592
1593 if (copy_to_user(dest, &tmp, sizeof tmp))
1594 return -EFAULT;
1595
1596 return 0;
1597 }
1598
1599 ssize_t ib_uverbs_poll_cq(struct ib_uverbs_file *file,
1600 const char __user *buf, int in_len,
1601 int out_len)
1602 {
1603 struct ib_uverbs_poll_cq cmd;
1604 struct ib_uverbs_poll_cq_resp resp;
1605 u8 __user *header_ptr;
1606 u8 __user *data_ptr;
1607 struct ib_cq *cq;
1608 struct ib_wc wc;
1609 int ret;
1610
1611 if (copy_from_user(&cmd, buf, sizeof cmd))
1612 return -EFAULT;
1613
1614 cq = idr_read_cq(cmd.cq_handle, file->ucontext, 0);
1615 if (!cq)
1616 return -EINVAL;
1617
1618 /* we copy a struct ib_uverbs_poll_cq_resp to user space */
1619 header_ptr = (void __user *)(unsigned long) cmd.response;
1620 data_ptr = header_ptr + sizeof resp;
1621
1622 memset(&resp, 0, sizeof resp);
1623 while (resp.count < cmd.ne) {
1624 ret = ib_poll_cq(cq, 1, &wc);
1625 if (ret < 0)
1626 goto out_put;
1627 if (!ret)
1628 break;
1629
1630 ret = copy_wc_to_user(data_ptr, &wc);
1631 if (ret)
1632 goto out_put;
1633
1634 data_ptr += sizeof(struct ib_uverbs_wc);
1635 ++resp.count;
1636 }
1637
1638 if (copy_to_user(header_ptr, &resp, sizeof resp)) {
1639 ret = -EFAULT;
1640 goto out_put;
1641 }
1642
1643 ret = in_len;
1644
1645 out_put:
1646 put_cq_read(cq);
1647 return ret;
1648 }
1649
1650 ssize_t ib_uverbs_req_notify_cq(struct ib_uverbs_file *file,
1651 const char __user *buf, int in_len,
1652 int out_len)
1653 {
1654 struct ib_uverbs_req_notify_cq cmd;
1655 struct ib_cq *cq;
1656
1657 if (copy_from_user(&cmd, buf, sizeof cmd))
1658 return -EFAULT;
1659
1660 cq = idr_read_cq(cmd.cq_handle, file->ucontext, 0);
1661 if (!cq)
1662 return -EINVAL;
1663
1664 ib_req_notify_cq(cq, cmd.solicited_only ?
1665 IB_CQ_SOLICITED : IB_CQ_NEXT_COMP);
1666
1667 put_cq_read(cq);
1668
1669 return in_len;
1670 }
1671
1672 ssize_t ib_uverbs_destroy_cq(struct ib_uverbs_file *file,
1673 const char __user *buf, int in_len,
1674 int out_len)
1675 {
1676 struct ib_uverbs_destroy_cq cmd;
1677 struct ib_uverbs_destroy_cq_resp resp;
1678 struct ib_uobject *uobj;
1679 struct ib_cq *cq;
1680 struct ib_ucq_object *obj;
1681 struct ib_uverbs_event_file *ev_file;
1682 int ret = -EINVAL;
1683
1684 if (copy_from_user(&cmd, buf, sizeof cmd))
1685 return -EFAULT;
1686
1687 uobj = idr_write_uobj(&ib_uverbs_cq_idr, cmd.cq_handle, file->ucontext);
1688 if (!uobj)
1689 return -EINVAL;
1690 cq = uobj->object;
1691 ev_file = cq->cq_context;
1692 obj = container_of(cq->uobject, struct ib_ucq_object, uobject);
1693
1694 ret = ib_destroy_cq(cq);
1695 if (!ret)
1696 uobj->live = 0;
1697
1698 put_uobj_write(uobj);
1699
1700 if (ret)
1701 return ret;
1702
1703 idr_remove_uobj(&ib_uverbs_cq_idr, uobj);
1704
1705 mutex_lock(&file->mutex);
1706 list_del(&uobj->list);
1707 mutex_unlock(&file->mutex);
1708
1709 ib_uverbs_release_ucq(file, ev_file, obj);
1710
1711 memset(&resp, 0, sizeof resp);
1712 resp.comp_events_reported = obj->comp_events_reported;
1713 resp.async_events_reported = obj->async_events_reported;
1714
1715 put_uobj(uobj);
1716
1717 if (copy_to_user((void __user *) (unsigned long) cmd.response,
1718 &resp, sizeof resp))
1719 return -EFAULT;
1720
1721 return in_len;
1722 }
1723
1724 ssize_t ib_uverbs_create_qp(struct ib_uverbs_file *file,
1725 const char __user *buf, int in_len,
1726 int out_len)
1727 {
1728 struct ib_uverbs_create_qp cmd;
1729 struct ib_uverbs_create_qp_resp resp;
1730 struct ib_udata udata;
1731 struct ib_uqp_object *obj;
1732 struct ib_device *device;
1733 struct ib_pd *pd = NULL;
1734 struct ib_xrcd *xrcd = NULL;
1735 struct ib_uobject *uninitialized_var(xrcd_uobj);
1736 struct ib_cq *scq = NULL, *rcq = NULL;
1737 struct ib_srq *srq = NULL;
1738 struct ib_qp *qp;
1739 struct ib_qp_init_attr attr;
1740 int ret;
1741
1742 if (out_len < sizeof resp)
1743 return -ENOSPC;
1744
1745 if (copy_from_user(&cmd, buf, sizeof cmd))
1746 return -EFAULT;
1747
1748 if (cmd.qp_type == IB_QPT_RAW_PACKET && !capable(CAP_NET_RAW))
1749 return -EPERM;
1750
1751 INIT_UDATA(&udata, buf + sizeof cmd,
1752 (unsigned long) cmd.response + sizeof resp,
1753 in_len - sizeof cmd, out_len - sizeof resp);
1754
1755 obj = kzalloc(sizeof *obj, GFP_KERNEL);
1756 if (!obj)
1757 return -ENOMEM;
1758
1759 init_uobj(&obj->uevent.uobject, cmd.user_handle, file->ucontext, &qp_lock_class);
1760 down_write(&obj->uevent.uobject.mutex);
1761
1762 if (cmd.qp_type == IB_QPT_XRC_TGT) {
1763 xrcd = idr_read_xrcd(cmd.pd_handle, file->ucontext, &xrcd_uobj);
1764 if (!xrcd) {
1765 ret = -EINVAL;
1766 goto err_put;
1767 }
1768 device = xrcd->device;
1769 } else {
1770 if (cmd.qp_type == IB_QPT_XRC_INI) {
1771 cmd.max_recv_wr = cmd.max_recv_sge = 0;
1772 } else {
1773 if (cmd.is_srq) {
1774 srq = idr_read_srq(cmd.srq_handle, file->ucontext);
1775 if (!srq || srq->srq_type != IB_SRQT_BASIC) {
1776 ret = -EINVAL;
1777 goto err_put;
1778 }
1779 }
1780
1781 if (cmd.recv_cq_handle != cmd.send_cq_handle) {
1782 rcq = idr_read_cq(cmd.recv_cq_handle, file->ucontext, 0);
1783 if (!rcq) {
1784 ret = -EINVAL;
1785 goto err_put;
1786 }
1787 }
1788 }
1789
1790 scq = idr_read_cq(cmd.send_cq_handle, file->ucontext, !!rcq);
1791 rcq = rcq ?: scq;
1792 pd = idr_read_pd(cmd.pd_handle, file->ucontext);
1793 if (!pd || !scq) {
1794 ret = -EINVAL;
1795 goto err_put;
1796 }
1797
1798 device = pd->device;
1799 }
1800
1801 attr.event_handler = ib_uverbs_qp_event_handler;
1802 attr.qp_context = file;
1803 attr.send_cq = scq;
1804 attr.recv_cq = rcq;
1805 attr.srq = srq;
1806 attr.xrcd = xrcd;
1807 attr.sq_sig_type = cmd.sq_sig_all ? IB_SIGNAL_ALL_WR : IB_SIGNAL_REQ_WR;
1808 attr.qp_type = cmd.qp_type;
1809 attr.create_flags = 0;
1810
1811 attr.cap.max_send_wr = cmd.max_send_wr;
1812 attr.cap.max_recv_wr = cmd.max_recv_wr;
1813 attr.cap.max_send_sge = cmd.max_send_sge;
1814 attr.cap.max_recv_sge = cmd.max_recv_sge;
1815 attr.cap.max_inline_data = cmd.max_inline_data;
1816
1817 obj->uevent.events_reported = 0;
1818 INIT_LIST_HEAD(&obj->uevent.event_list);
1819 INIT_LIST_HEAD(&obj->mcast_list);
1820
1821 if (cmd.qp_type == IB_QPT_XRC_TGT)
1822 qp = ib_create_qp(pd, &attr);
1823 else
1824 qp = device->create_qp(pd, &attr, &udata);
1825
1826 if (IS_ERR(qp)) {
1827 ret = PTR_ERR(qp);
1828 goto err_put;
1829 }
1830
1831 if (cmd.qp_type != IB_QPT_XRC_TGT) {
1832 qp->real_qp = qp;
1833 qp->device = device;
1834 qp->pd = pd;
1835 qp->send_cq = attr.send_cq;
1836 qp->recv_cq = attr.recv_cq;
1837 qp->srq = attr.srq;
1838 qp->event_handler = attr.event_handler;
1839 qp->qp_context = attr.qp_context;
1840 qp->qp_type = attr.qp_type;
1841 atomic_set(&qp->usecnt, 0);
1842 atomic_inc(&pd->usecnt);
1843 atomic_inc(&attr.send_cq->usecnt);
1844 if (attr.recv_cq)
1845 atomic_inc(&attr.recv_cq->usecnt);
1846 if (attr.srq)
1847 atomic_inc(&attr.srq->usecnt);
1848 }
1849 qp->uobject = &obj->uevent.uobject;
1850
1851 obj->uevent.uobject.object = qp;
1852 ret = idr_add_uobj(&ib_uverbs_qp_idr, &obj->uevent.uobject);
1853 if (ret)
1854 goto err_destroy;
1855
1856 memset(&resp, 0, sizeof resp);
1857 resp.qpn = qp->qp_num;
1858 resp.qp_handle = obj->uevent.uobject.id;
1859 resp.max_recv_sge = attr.cap.max_recv_sge;
1860 resp.max_send_sge = attr.cap.max_send_sge;
1861 resp.max_recv_wr = attr.cap.max_recv_wr;
1862 resp.max_send_wr = attr.cap.max_send_wr;
1863 resp.max_inline_data = attr.cap.max_inline_data;
1864
1865 if (copy_to_user((void __user *) (unsigned long) cmd.response,
1866 &resp, sizeof resp)) {
1867 ret = -EFAULT;
1868 goto err_copy;
1869 }
1870
1871 if (xrcd) {
1872 obj->uxrcd = container_of(xrcd_uobj, struct ib_uxrcd_object,
1873 uobject);
1874 atomic_inc(&obj->uxrcd->refcnt);
1875 put_xrcd_read(xrcd_uobj);
1876 }
1877
1878 if (pd)
1879 put_pd_read(pd);
1880 if (scq)
1881 put_cq_read(scq);
1882 if (rcq && rcq != scq)
1883 put_cq_read(rcq);
1884 if (srq)
1885 put_srq_read(srq);
1886
1887 mutex_lock(&file->mutex);
1888 list_add_tail(&obj->uevent.uobject.list, &file->ucontext->qp_list);
1889 mutex_unlock(&file->mutex);
1890
1891 obj->uevent.uobject.live = 1;
1892
1893 up_write(&obj->uevent.uobject.mutex);
1894
1895 return in_len;
1896
1897 err_copy:
1898 idr_remove_uobj(&ib_uverbs_qp_idr, &obj->uevent.uobject);
1899
1900 err_destroy:
1901 ib_destroy_qp(qp);
1902
1903 err_put:
1904 if (xrcd)
1905 put_xrcd_read(xrcd_uobj);
1906 if (pd)
1907 put_pd_read(pd);
1908 if (scq)
1909 put_cq_read(scq);
1910 if (rcq && rcq != scq)
1911 put_cq_read(rcq);
1912 if (srq)
1913 put_srq_read(srq);
1914
1915 put_uobj_write(&obj->uevent.uobject);
1916 return ret;
1917 }
1918
1919 ssize_t ib_uverbs_open_qp(struct ib_uverbs_file *file,
1920 const char __user *buf, int in_len, int out_len)
1921 {
1922 struct ib_uverbs_open_qp cmd;
1923 struct ib_uverbs_create_qp_resp resp;
1924 struct ib_udata udata;
1925 struct ib_uqp_object *obj;
1926 struct ib_xrcd *xrcd;
1927 struct ib_uobject *uninitialized_var(xrcd_uobj);
1928 struct ib_qp *qp;
1929 struct ib_qp_open_attr attr;
1930 int ret;
1931
1932 if (out_len < sizeof resp)
1933 return -ENOSPC;
1934
1935 if (copy_from_user(&cmd, buf, sizeof cmd))
1936 return -EFAULT;
1937
1938 INIT_UDATA(&udata, buf + sizeof cmd,
1939 (unsigned long) cmd.response + sizeof resp,
1940 in_len - sizeof cmd, out_len - sizeof resp);
1941
1942 obj = kmalloc(sizeof *obj, GFP_KERNEL);
1943 if (!obj)
1944 return -ENOMEM;
1945
1946 init_uobj(&obj->uevent.uobject, cmd.user_handle, file->ucontext, &qp_lock_class);
1947 down_write(&obj->uevent.uobject.mutex);
1948
1949 xrcd = idr_read_xrcd(cmd.pd_handle, file->ucontext, &xrcd_uobj);
1950 if (!xrcd) {
1951 ret = -EINVAL;
1952 goto err_put;
1953 }
1954
1955 attr.event_handler = ib_uverbs_qp_event_handler;
1956 attr.qp_context = file;
1957 attr.qp_num = cmd.qpn;
1958 attr.qp_type = cmd.qp_type;
1959
1960 obj->uevent.events_reported = 0;
1961 INIT_LIST_HEAD(&obj->uevent.event_list);
1962 INIT_LIST_HEAD(&obj->mcast_list);
1963
1964 qp = ib_open_qp(xrcd, &attr);
1965 if (IS_ERR(qp)) {
1966 ret = PTR_ERR(qp);
1967 goto err_put;
1968 }
1969
1970 qp->uobject = &obj->uevent.uobject;
1971
1972 obj->uevent.uobject.object = qp;
1973 ret = idr_add_uobj(&ib_uverbs_qp_idr, &obj->uevent.uobject);
1974 if (ret)
1975 goto err_destroy;
1976
1977 memset(&resp, 0, sizeof resp);
1978 resp.qpn = qp->qp_num;
1979 resp.qp_handle = obj->uevent.uobject.id;
1980
1981 if (copy_to_user((void __user *) (unsigned long) cmd.response,
1982 &resp, sizeof resp)) {
1983 ret = -EFAULT;
1984 goto err_remove;
1985 }
1986
1987 obj->uxrcd = container_of(xrcd_uobj, struct ib_uxrcd_object, uobject);
1988 atomic_inc(&obj->uxrcd->refcnt);
1989 put_xrcd_read(xrcd_uobj);
1990
1991 mutex_lock(&file->mutex);
1992 list_add_tail(&obj->uevent.uobject.list, &file->ucontext->qp_list);
1993 mutex_unlock(&file->mutex);
1994
1995 obj->uevent.uobject.live = 1;
1996
1997 up_write(&obj->uevent.uobject.mutex);
1998
1999 return in_len;
2000
2001 err_remove:
2002 idr_remove_uobj(&ib_uverbs_qp_idr, &obj->uevent.uobject);
2003
2004 err_destroy:
2005 ib_destroy_qp(qp);
2006
2007 err_put:
2008 put_xrcd_read(xrcd_uobj);
2009 put_uobj_write(&obj->uevent.uobject);
2010 return ret;
2011 }
2012
2013 ssize_t ib_uverbs_query_qp(struct ib_uverbs_file *file,
2014 const char __user *buf, int in_len,
2015 int out_len)
2016 {
2017 struct ib_uverbs_query_qp cmd;
2018 struct ib_uverbs_query_qp_resp resp;
2019 struct ib_qp *qp;
2020 struct ib_qp_attr *attr;
2021 struct ib_qp_init_attr *init_attr;
2022 int ret;
2023
2024 if (copy_from_user(&cmd, buf, sizeof cmd))
2025 return -EFAULT;
2026
2027 attr = kmalloc(sizeof *attr, GFP_KERNEL);
2028 init_attr = kmalloc(sizeof *init_attr, GFP_KERNEL);
2029 if (!attr || !init_attr) {
2030 ret = -ENOMEM;
2031 goto out;
2032 }
2033
2034 qp = idr_read_qp(cmd.qp_handle, file->ucontext);
2035 if (!qp) {
2036 ret = -EINVAL;
2037 goto out;
2038 }
2039
2040 ret = ib_query_qp(qp, attr, cmd.attr_mask, init_attr);
2041
2042 put_qp_read(qp);
2043
2044 if (ret)
2045 goto out;
2046
2047 memset(&resp, 0, sizeof resp);
2048
2049 resp.qp_state = attr->qp_state;
2050 resp.cur_qp_state = attr->cur_qp_state;
2051 resp.path_mtu = attr->path_mtu;
2052 resp.path_mig_state = attr->path_mig_state;
2053 resp.qkey = attr->qkey;
2054 resp.rq_psn = attr->rq_psn;
2055 resp.sq_psn = attr->sq_psn;
2056 resp.dest_qp_num = attr->dest_qp_num;
2057 resp.qp_access_flags = attr->qp_access_flags;
2058 resp.pkey_index = attr->pkey_index;
2059 resp.alt_pkey_index = attr->alt_pkey_index;
2060 resp.sq_draining = attr->sq_draining;
2061 resp.max_rd_atomic = attr->max_rd_atomic;
2062 resp.max_dest_rd_atomic = attr->max_dest_rd_atomic;
2063 resp.min_rnr_timer = attr->min_rnr_timer;
2064 resp.port_num = attr->port_num;
2065 resp.timeout = attr->timeout;
2066 resp.retry_cnt = attr->retry_cnt;
2067 resp.rnr_retry = attr->rnr_retry;
2068 resp.alt_port_num = attr->alt_port_num;
2069 resp.alt_timeout = attr->alt_timeout;
2070
2071 memcpy(resp.dest.dgid, attr->ah_attr.grh.dgid.raw, 16);
2072 resp.dest.flow_label = attr->ah_attr.grh.flow_label;
2073 resp.dest.sgid_index = attr->ah_attr.grh.sgid_index;
2074 resp.dest.hop_limit = attr->ah_attr.grh.hop_limit;
2075 resp.dest.traffic_class = attr->ah_attr.grh.traffic_class;
2076 resp.dest.dlid = attr->ah_attr.dlid;
2077 resp.dest.sl = attr->ah_attr.sl;
2078 resp.dest.src_path_bits = attr->ah_attr.src_path_bits;
2079 resp.dest.static_rate = attr->ah_attr.static_rate;
2080 resp.dest.is_global = !!(attr->ah_attr.ah_flags & IB_AH_GRH);
2081 resp.dest.port_num = attr->ah_attr.port_num;
2082
2083 memcpy(resp.alt_dest.dgid, attr->alt_ah_attr.grh.dgid.raw, 16);
2084 resp.alt_dest.flow_label = attr->alt_ah_attr.grh.flow_label;
2085 resp.alt_dest.sgid_index = attr->alt_ah_attr.grh.sgid_index;
2086 resp.alt_dest.hop_limit = attr->alt_ah_attr.grh.hop_limit;
2087 resp.alt_dest.traffic_class = attr->alt_ah_attr.grh.traffic_class;
2088 resp.alt_dest.dlid = attr->alt_ah_attr.dlid;
2089 resp.alt_dest.sl = attr->alt_ah_attr.sl;
2090 resp.alt_dest.src_path_bits = attr->alt_ah_attr.src_path_bits;
2091 resp.alt_dest.static_rate = attr->alt_ah_attr.static_rate;
2092 resp.alt_dest.is_global = !!(attr->alt_ah_attr.ah_flags & IB_AH_GRH);
2093 resp.alt_dest.port_num = attr->alt_ah_attr.port_num;
2094
2095 resp.max_send_wr = init_attr->cap.max_send_wr;
2096 resp.max_recv_wr = init_attr->cap.max_recv_wr;
2097 resp.max_send_sge = init_attr->cap.max_send_sge;
2098 resp.max_recv_sge = init_attr->cap.max_recv_sge;
2099 resp.max_inline_data = init_attr->cap.max_inline_data;
2100 resp.sq_sig_all = init_attr->sq_sig_type == IB_SIGNAL_ALL_WR;
2101
2102 if (copy_to_user((void __user *) (unsigned long) cmd.response,
2103 &resp, sizeof resp))
2104 ret = -EFAULT;
2105
2106 out:
2107 kfree(attr);
2108 kfree(init_attr);
2109
2110 return ret ? ret : in_len;
2111 }
2112
2113 /* Remove ignored fields set in the attribute mask */
2114 static int modify_qp_mask(enum ib_qp_type qp_type, int mask)
2115 {
2116 switch (qp_type) {
2117 case IB_QPT_XRC_INI:
2118 return mask & ~(IB_QP_MAX_DEST_RD_ATOMIC | IB_QP_MIN_RNR_TIMER);
2119 case IB_QPT_XRC_TGT:
2120 return mask & ~(IB_QP_MAX_QP_RD_ATOMIC | IB_QP_RETRY_CNT |
2121 IB_QP_RNR_RETRY);
2122 default:
2123 return mask;
2124 }
2125 }
2126
2127 ssize_t ib_uverbs_modify_qp(struct ib_uverbs_file *file,
2128 const char __user *buf, int in_len,
2129 int out_len)
2130 {
2131 struct ib_uverbs_modify_qp cmd;
2132 struct ib_udata udata;
2133 struct ib_qp *qp;
2134 struct ib_qp_attr *attr;
2135 int ret;
2136
2137 if (copy_from_user(&cmd, buf, sizeof cmd))
2138 return -EFAULT;
2139
2140 INIT_UDATA(&udata, buf + sizeof cmd, NULL, in_len - sizeof cmd,
2141 out_len);
2142
2143 attr = kmalloc(sizeof *attr, GFP_KERNEL);
2144 if (!attr)
2145 return -ENOMEM;
2146
2147 qp = idr_read_qp(cmd.qp_handle, file->ucontext);
2148 if (!qp) {
2149 ret = -EINVAL;
2150 goto out;
2151 }
2152
2153 attr->qp_state = cmd.qp_state;
2154 attr->cur_qp_state = cmd.cur_qp_state;
2155 attr->path_mtu = cmd.path_mtu;
2156 attr->path_mig_state = cmd.path_mig_state;
2157 attr->qkey = cmd.qkey;
2158 attr->rq_psn = cmd.rq_psn;
2159 attr->sq_psn = cmd.sq_psn;
2160 attr->dest_qp_num = cmd.dest_qp_num;
2161 attr->qp_access_flags = cmd.qp_access_flags;
2162 attr->pkey_index = cmd.pkey_index;
2163 attr->alt_pkey_index = cmd.alt_pkey_index;
2164 attr->en_sqd_async_notify = cmd.en_sqd_async_notify;
2165 attr->max_rd_atomic = cmd.max_rd_atomic;
2166 attr->max_dest_rd_atomic = cmd.max_dest_rd_atomic;
2167 attr->min_rnr_timer = cmd.min_rnr_timer;
2168 attr->port_num = cmd.port_num;
2169 attr->timeout = cmd.timeout;
2170 attr->retry_cnt = cmd.retry_cnt;
2171 attr->rnr_retry = cmd.rnr_retry;
2172 attr->alt_port_num = cmd.alt_port_num;
2173 attr->alt_timeout = cmd.alt_timeout;
2174
2175 memcpy(attr->ah_attr.grh.dgid.raw, cmd.dest.dgid, 16);
2176 attr->ah_attr.grh.flow_label = cmd.dest.flow_label;
2177 attr->ah_attr.grh.sgid_index = cmd.dest.sgid_index;
2178 attr->ah_attr.grh.hop_limit = cmd.dest.hop_limit;
2179 attr->ah_attr.grh.traffic_class = cmd.dest.traffic_class;
2180 attr->ah_attr.dlid = cmd.dest.dlid;
2181 attr->ah_attr.sl = cmd.dest.sl;
2182 attr->ah_attr.src_path_bits = cmd.dest.src_path_bits;
2183 attr->ah_attr.static_rate = cmd.dest.static_rate;
2184 attr->ah_attr.ah_flags = cmd.dest.is_global ? IB_AH_GRH : 0;
2185 attr->ah_attr.port_num = cmd.dest.port_num;
2186
2187 memcpy(attr->alt_ah_attr.grh.dgid.raw, cmd.alt_dest.dgid, 16);
2188 attr->alt_ah_attr.grh.flow_label = cmd.alt_dest.flow_label;
2189 attr->alt_ah_attr.grh.sgid_index = cmd.alt_dest.sgid_index;
2190 attr->alt_ah_attr.grh.hop_limit = cmd.alt_dest.hop_limit;
2191 attr->alt_ah_attr.grh.traffic_class = cmd.alt_dest.traffic_class;
2192 attr->alt_ah_attr.dlid = cmd.alt_dest.dlid;
2193 attr->alt_ah_attr.sl = cmd.alt_dest.sl;
2194 attr->alt_ah_attr.src_path_bits = cmd.alt_dest.src_path_bits;
2195 attr->alt_ah_attr.static_rate = cmd.alt_dest.static_rate;
2196 attr->alt_ah_attr.ah_flags = cmd.alt_dest.is_global ? IB_AH_GRH : 0;
2197 attr->alt_ah_attr.port_num = cmd.alt_dest.port_num;
2198
2199 if (qp->real_qp == qp) {
2200 ret = ib_resolve_eth_l2_attrs(qp, attr, &cmd.attr_mask);
2201 if (ret)
2202 goto release_qp;
2203 ret = qp->device->modify_qp(qp, attr,
2204 modify_qp_mask(qp->qp_type, cmd.attr_mask), &udata);
2205 } else {
2206 ret = ib_modify_qp(qp, attr, modify_qp_mask(qp->qp_type, cmd.attr_mask));
2207 }
2208
2209 if (ret)
2210 goto release_qp;
2211
2212 ret = in_len;
2213
2214 release_qp:
2215 put_qp_read(qp);
2216
2217 out:
2218 kfree(attr);
2219
2220 return ret;
2221 }
2222
2223 ssize_t ib_uverbs_destroy_qp(struct ib_uverbs_file *file,
2224 const char __user *buf, int in_len,
2225 int out_len)
2226 {
2227 struct ib_uverbs_destroy_qp cmd;
2228 struct ib_uverbs_destroy_qp_resp resp;
2229 struct ib_uobject *uobj;
2230 struct ib_qp *qp;
2231 struct ib_uqp_object *obj;
2232 int ret = -EINVAL;
2233
2234 if (copy_from_user(&cmd, buf, sizeof cmd))
2235 return -EFAULT;
2236
2237 memset(&resp, 0, sizeof resp);
2238
2239 uobj = idr_write_uobj(&ib_uverbs_qp_idr, cmd.qp_handle, file->ucontext);
2240 if (!uobj)
2241 return -EINVAL;
2242 qp = uobj->object;
2243 obj = container_of(uobj, struct ib_uqp_object, uevent.uobject);
2244
2245 if (!list_empty(&obj->mcast_list)) {
2246 put_uobj_write(uobj);
2247 return -EBUSY;
2248 }
2249
2250 ret = ib_destroy_qp(qp);
2251 if (!ret)
2252 uobj->live = 0;
2253
2254 put_uobj_write(uobj);
2255
2256 if (ret)
2257 return ret;
2258
2259 if (obj->uxrcd)
2260 atomic_dec(&obj->uxrcd->refcnt);
2261
2262 idr_remove_uobj(&ib_uverbs_qp_idr, uobj);
2263
2264 mutex_lock(&file->mutex);
2265 list_del(&uobj->list);
2266 mutex_unlock(&file->mutex);
2267
2268 ib_uverbs_release_uevent(file, &obj->uevent);
2269
2270 resp.events_reported = obj->uevent.events_reported;
2271
2272 put_uobj(uobj);
2273
2274 if (copy_to_user((void __user *) (unsigned long) cmd.response,
2275 &resp, sizeof resp))
2276 return -EFAULT;
2277
2278 return in_len;
2279 }
2280
2281 ssize_t ib_uverbs_post_send(struct ib_uverbs_file *file,
2282 const char __user *buf, int in_len,
2283 int out_len)
2284 {
2285 struct ib_uverbs_post_send cmd;
2286 struct ib_uverbs_post_send_resp resp;
2287 struct ib_uverbs_send_wr *user_wr;
2288 struct ib_send_wr *wr = NULL, *last, *next, *bad_wr;
2289 struct ib_qp *qp;
2290 int i, sg_ind;
2291 int is_ud;
2292 ssize_t ret = -EINVAL;
2293
2294 if (copy_from_user(&cmd, buf, sizeof cmd))
2295 return -EFAULT;
2296
2297 if (in_len < sizeof cmd + cmd.wqe_size * cmd.wr_count +
2298 cmd.sge_count * sizeof (struct ib_uverbs_sge))
2299 return -EINVAL;
2300
2301 if (cmd.wqe_size < sizeof (struct ib_uverbs_send_wr))
2302 return -EINVAL;
2303
2304 user_wr = kmalloc(cmd.wqe_size, GFP_KERNEL);
2305 if (!user_wr)
2306 return -ENOMEM;
2307
2308 qp = idr_read_qp(cmd.qp_handle, file->ucontext);
2309 if (!qp)
2310 goto out;
2311
2312 is_ud = qp->qp_type == IB_QPT_UD;
2313 sg_ind = 0;
2314 last = NULL;
2315 for (i = 0; i < cmd.wr_count; ++i) {
2316 if (copy_from_user(user_wr,
2317 buf + sizeof cmd + i * cmd.wqe_size,
2318 cmd.wqe_size)) {
2319 ret = -EFAULT;
2320 goto out_put;
2321 }
2322
2323 if (user_wr->num_sge + sg_ind > cmd.sge_count) {
2324 ret = -EINVAL;
2325 goto out_put;
2326 }
2327
2328 next = kmalloc(ALIGN(sizeof *next, sizeof (struct ib_sge)) +
2329 user_wr->num_sge * sizeof (struct ib_sge),
2330 GFP_KERNEL);
2331 if (!next) {
2332 ret = -ENOMEM;
2333 goto out_put;
2334 }
2335
2336 if (!last)
2337 wr = next;
2338 else
2339 last->next = next;
2340 last = next;
2341
2342 next->next = NULL;
2343 next->wr_id = user_wr->wr_id;
2344 next->num_sge = user_wr->num_sge;
2345 next->opcode = user_wr->opcode;
2346 next->send_flags = user_wr->send_flags;
2347
2348 if (is_ud) {
2349 next->wr.ud.ah = idr_read_ah(user_wr->wr.ud.ah,
2350 file->ucontext);
2351 if (!next->wr.ud.ah) {
2352 ret = -EINVAL;
2353 goto out_put;
2354 }
2355 next->wr.ud.remote_qpn = user_wr->wr.ud.remote_qpn;
2356 next->wr.ud.remote_qkey = user_wr->wr.ud.remote_qkey;
2357 if (next->opcode == IB_WR_SEND_WITH_IMM)
2358 next->ex.imm_data =
2359 (__be32 __force) user_wr->ex.imm_data;
2360 } else {
2361 switch (next->opcode) {
2362 case IB_WR_RDMA_WRITE_WITH_IMM:
2363 next->ex.imm_data =
2364 (__be32 __force) user_wr->ex.imm_data;
2365 case IB_WR_RDMA_WRITE:
2366 case IB_WR_RDMA_READ:
2367 next->wr.rdma.remote_addr =
2368 user_wr->wr.rdma.remote_addr;
2369 next->wr.rdma.rkey =
2370 user_wr->wr.rdma.rkey;
2371 break;
2372 case IB_WR_SEND_WITH_IMM:
2373 next->ex.imm_data =
2374 (__be32 __force) user_wr->ex.imm_data;
2375 break;
2376 case IB_WR_SEND_WITH_INV:
2377 next->ex.invalidate_rkey =
2378 user_wr->ex.invalidate_rkey;
2379 break;
2380 case IB_WR_ATOMIC_CMP_AND_SWP:
2381 case IB_WR_ATOMIC_FETCH_AND_ADD:
2382 next->wr.atomic.remote_addr =
2383 user_wr->wr.atomic.remote_addr;
2384 next->wr.atomic.compare_add =
2385 user_wr->wr.atomic.compare_add;
2386 next->wr.atomic.swap = user_wr->wr.atomic.swap;
2387 next->wr.atomic.rkey = user_wr->wr.atomic.rkey;
2388 break;
2389 default:
2390 break;
2391 }
2392 }
2393
2394 if (next->num_sge) {
2395 next->sg_list = (void *) next +
2396 ALIGN(sizeof *next, sizeof (struct ib_sge));
2397 if (copy_from_user(next->sg_list,
2398 buf + sizeof cmd +
2399 cmd.wr_count * cmd.wqe_size +
2400 sg_ind * sizeof (struct ib_sge),
2401 next->num_sge * sizeof (struct ib_sge))) {
2402 ret = -EFAULT;
2403 goto out_put;
2404 }
2405 sg_ind += next->num_sge;
2406 } else
2407 next->sg_list = NULL;
2408 }
2409
2410 resp.bad_wr = 0;
2411 ret = qp->device->post_send(qp->real_qp, wr, &bad_wr);
2412 if (ret)
2413 for (next = wr; next; next = next->next) {
2414 ++resp.bad_wr;
2415 if (next == bad_wr)
2416 break;
2417 }
2418
2419 if (copy_to_user((void __user *) (unsigned long) cmd.response,
2420 &resp, sizeof resp))
2421 ret = -EFAULT;
2422
2423 out_put:
2424 put_qp_read(qp);
2425
2426 while (wr) {
2427 if (is_ud && wr->wr.ud.ah)
2428 put_ah_read(wr->wr.ud.ah);
2429 next = wr->next;
2430 kfree(wr);
2431 wr = next;
2432 }
2433
2434 out:
2435 kfree(user_wr);
2436
2437 return ret ? ret : in_len;
2438 }
2439
2440 static struct ib_recv_wr *ib_uverbs_unmarshall_recv(const char __user *buf,
2441 int in_len,
2442 u32 wr_count,
2443 u32 sge_count,
2444 u32 wqe_size)
2445 {
2446 struct ib_uverbs_recv_wr *user_wr;
2447 struct ib_recv_wr *wr = NULL, *last, *next;
2448 int sg_ind;
2449 int i;
2450 int ret;
2451
2452 if (in_len < wqe_size * wr_count +
2453 sge_count * sizeof (struct ib_uverbs_sge))
2454 return ERR_PTR(-EINVAL);
2455
2456 if (wqe_size < sizeof (struct ib_uverbs_recv_wr))
2457 return ERR_PTR(-EINVAL);
2458
2459 user_wr = kmalloc(wqe_size, GFP_KERNEL);
2460 if (!user_wr)
2461 return ERR_PTR(-ENOMEM);
2462
2463 sg_ind = 0;
2464 last = NULL;
2465 for (i = 0; i < wr_count; ++i) {
2466 if (copy_from_user(user_wr, buf + i * wqe_size,
2467 wqe_size)) {
2468 ret = -EFAULT;
2469 goto err;
2470 }
2471
2472 if (user_wr->num_sge + sg_ind > sge_count) {
2473 ret = -EINVAL;
2474 goto err;
2475 }
2476
2477 next = kmalloc(ALIGN(sizeof *next, sizeof (struct ib_sge)) +
2478 user_wr->num_sge * sizeof (struct ib_sge),
2479 GFP_KERNEL);
2480 if (!next) {
2481 ret = -ENOMEM;
2482 goto err;
2483 }
2484
2485 if (!last)
2486 wr = next;
2487 else
2488 last->next = next;
2489 last = next;
2490
2491 next->next = NULL;
2492 next->wr_id = user_wr->wr_id;
2493 next->num_sge = user_wr->num_sge;
2494
2495 if (next->num_sge) {
2496 next->sg_list = (void *) next +
2497 ALIGN(sizeof *next, sizeof (struct ib_sge));
2498 if (copy_from_user(next->sg_list,
2499 buf + wr_count * wqe_size +
2500 sg_ind * sizeof (struct ib_sge),
2501 next->num_sge * sizeof (struct ib_sge))) {
2502 ret = -EFAULT;
2503 goto err;
2504 }
2505 sg_ind += next->num_sge;
2506 } else
2507 next->sg_list = NULL;
2508 }
2509
2510 kfree(user_wr);
2511 return wr;
2512
2513 err:
2514 kfree(user_wr);
2515
2516 while (wr) {
2517 next = wr->next;
2518 kfree(wr);
2519 wr = next;
2520 }
2521
2522 return ERR_PTR(ret);
2523 }
2524
2525 ssize_t ib_uverbs_post_recv(struct ib_uverbs_file *file,
2526 const char __user *buf, int in_len,
2527 int out_len)
2528 {
2529 struct ib_uverbs_post_recv cmd;
2530 struct ib_uverbs_post_recv_resp resp;
2531 struct ib_recv_wr *wr, *next, *bad_wr;
2532 struct ib_qp *qp;
2533 ssize_t ret = -EINVAL;
2534
2535 if (copy_from_user(&cmd, buf, sizeof cmd))
2536 return -EFAULT;
2537
2538 wr = ib_uverbs_unmarshall_recv(buf + sizeof cmd,
2539 in_len - sizeof cmd, cmd.wr_count,
2540 cmd.sge_count, cmd.wqe_size);
2541 if (IS_ERR(wr))
2542 return PTR_ERR(wr);
2543
2544 qp = idr_read_qp(cmd.qp_handle, file->ucontext);
2545 if (!qp)
2546 goto out;
2547
2548 resp.bad_wr = 0;
2549 ret = qp->device->post_recv(qp->real_qp, wr, &bad_wr);
2550
2551 put_qp_read(qp);
2552
2553 if (ret)
2554 for (next = wr; next; next = next->next) {
2555 ++resp.bad_wr;
2556 if (next == bad_wr)
2557 break;
2558 }
2559
2560 if (copy_to_user((void __user *) (unsigned long) cmd.response,
2561 &resp, sizeof resp))
2562 ret = -EFAULT;
2563
2564 out:
2565 while (wr) {
2566 next = wr->next;
2567 kfree(wr);
2568 wr = next;
2569 }
2570
2571 return ret ? ret : in_len;
2572 }
2573
2574 ssize_t ib_uverbs_post_srq_recv(struct ib_uverbs_file *file,
2575 const char __user *buf, int in_len,
2576 int out_len)
2577 {
2578 struct ib_uverbs_post_srq_recv cmd;
2579 struct ib_uverbs_post_srq_recv_resp resp;
2580 struct ib_recv_wr *wr, *next, *bad_wr;
2581 struct ib_srq *srq;
2582 ssize_t ret = -EINVAL;
2583
2584 if (copy_from_user(&cmd, buf, sizeof cmd))
2585 return -EFAULT;
2586
2587 wr = ib_uverbs_unmarshall_recv(buf + sizeof cmd,
2588 in_len - sizeof cmd, cmd.wr_count,
2589 cmd.sge_count, cmd.wqe_size);
2590 if (IS_ERR(wr))
2591 return PTR_ERR(wr);
2592
2593 srq = idr_read_srq(cmd.srq_handle, file->ucontext);
2594 if (!srq)
2595 goto out;
2596
2597 resp.bad_wr = 0;
2598 ret = srq->device->post_srq_recv(srq, wr, &bad_wr);
2599
2600 put_srq_read(srq);
2601
2602 if (ret)
2603 for (next = wr; next; next = next->next) {
2604 ++resp.bad_wr;
2605 if (next == bad_wr)
2606 break;
2607 }
2608
2609 if (copy_to_user((void __user *) (unsigned long) cmd.response,
2610 &resp, sizeof resp))
2611 ret = -EFAULT;
2612
2613 out:
2614 while (wr) {
2615 next = wr->next;
2616 kfree(wr);
2617 wr = next;
2618 }
2619
2620 return ret ? ret : in_len;
2621 }
2622
2623 ssize_t ib_uverbs_create_ah(struct ib_uverbs_file *file,
2624 const char __user *buf, int in_len,
2625 int out_len)
2626 {
2627 struct ib_uverbs_create_ah cmd;
2628 struct ib_uverbs_create_ah_resp resp;
2629 struct ib_uobject *uobj;
2630 struct ib_pd *pd;
2631 struct ib_ah *ah;
2632 struct ib_ah_attr attr;
2633 int ret;
2634
2635 if (out_len < sizeof resp)
2636 return -ENOSPC;
2637
2638 if (copy_from_user(&cmd, buf, sizeof cmd))
2639 return -EFAULT;
2640
2641 uobj = kmalloc(sizeof *uobj, GFP_KERNEL);
2642 if (!uobj)
2643 return -ENOMEM;
2644
2645 init_uobj(uobj, cmd.user_handle, file->ucontext, &ah_lock_class);
2646 down_write(&uobj->mutex);
2647
2648 pd = idr_read_pd(cmd.pd_handle, file->ucontext);
2649 if (!pd) {
2650 ret = -EINVAL;
2651 goto err;
2652 }
2653
2654 attr.dlid = cmd.attr.dlid;
2655 attr.sl = cmd.attr.sl;
2656 attr.src_path_bits = cmd.attr.src_path_bits;
2657 attr.static_rate = cmd.attr.static_rate;
2658 attr.ah_flags = cmd.attr.is_global ? IB_AH_GRH : 0;
2659 attr.port_num = cmd.attr.port_num;
2660 attr.grh.flow_label = cmd.attr.grh.flow_label;
2661 attr.grh.sgid_index = cmd.attr.grh.sgid_index;
2662 attr.grh.hop_limit = cmd.attr.grh.hop_limit;
2663 attr.grh.traffic_class = cmd.attr.grh.traffic_class;
2664 attr.vlan_id = 0;
2665 memset(&attr.dmac, 0, sizeof(attr.dmac));
2666 memcpy(attr.grh.dgid.raw, cmd.attr.grh.dgid, 16);
2667
2668 ah = ib_create_ah(pd, &attr);
2669 if (IS_ERR(ah)) {
2670 ret = PTR_ERR(ah);
2671 goto err_put;
2672 }
2673
2674 ah->uobject = uobj;
2675 uobj->object = ah;
2676
2677 ret = idr_add_uobj(&ib_uverbs_ah_idr, uobj);
2678 if (ret)
2679 goto err_destroy;
2680
2681 resp.ah_handle = uobj->id;
2682
2683 if (copy_to_user((void __user *) (unsigned long) cmd.response,
2684 &resp, sizeof resp)) {
2685 ret = -EFAULT;
2686 goto err_copy;
2687 }
2688
2689 put_pd_read(pd);
2690
2691 mutex_lock(&file->mutex);
2692 list_add_tail(&uobj->list, &file->ucontext->ah_list);
2693 mutex_unlock(&file->mutex);
2694
2695 uobj->live = 1;
2696
2697 up_write(&uobj->mutex);
2698
2699 return in_len;
2700
2701 err_copy:
2702 idr_remove_uobj(&ib_uverbs_ah_idr, uobj);
2703
2704 err_destroy:
2705 ib_destroy_ah(ah);
2706
2707 err_put:
2708 put_pd_read(pd);
2709
2710 err:
2711 put_uobj_write(uobj);
2712 return ret;
2713 }
2714
2715 ssize_t ib_uverbs_destroy_ah(struct ib_uverbs_file *file,
2716 const char __user *buf, int in_len, int out_len)
2717 {
2718 struct ib_uverbs_destroy_ah cmd;
2719 struct ib_ah *ah;
2720 struct ib_uobject *uobj;
2721 int ret;
2722
2723 if (copy_from_user(&cmd, buf, sizeof cmd))
2724 return -EFAULT;
2725
2726 uobj = idr_write_uobj(&ib_uverbs_ah_idr, cmd.ah_handle, file->ucontext);
2727 if (!uobj)
2728 return -EINVAL;
2729 ah = uobj->object;
2730
2731 ret = ib_destroy_ah(ah);
2732 if (!ret)
2733 uobj->live = 0;
2734
2735 put_uobj_write(uobj);
2736
2737 if (ret)
2738 return ret;
2739
2740 idr_remove_uobj(&ib_uverbs_ah_idr, uobj);
2741
2742 mutex_lock(&file->mutex);
2743 list_del(&uobj->list);
2744 mutex_unlock(&file->mutex);
2745
2746 put_uobj(uobj);
2747
2748 return in_len;
2749 }
2750
2751 ssize_t ib_uverbs_attach_mcast(struct ib_uverbs_file *file,
2752 const char __user *buf, int in_len,
2753 int out_len)
2754 {
2755 struct ib_uverbs_attach_mcast cmd;
2756 struct ib_qp *qp;
2757 struct ib_uqp_object *obj;
2758 struct ib_uverbs_mcast_entry *mcast;
2759 int ret;
2760
2761 if (copy_from_user(&cmd, buf, sizeof cmd))
2762 return -EFAULT;
2763
2764 qp = idr_write_qp(cmd.qp_handle, file->ucontext);
2765 if (!qp)
2766 return -EINVAL;
2767
2768 obj = container_of(qp->uobject, struct ib_uqp_object, uevent.uobject);
2769
2770 list_for_each_entry(mcast, &obj->mcast_list, list)
2771 if (cmd.mlid == mcast->lid &&
2772 !memcmp(cmd.gid, mcast->gid.raw, sizeof mcast->gid.raw)) {
2773 ret = 0;
2774 goto out_put;
2775 }
2776
2777 mcast = kmalloc(sizeof *mcast, GFP_KERNEL);
2778 if (!mcast) {
2779 ret = -ENOMEM;
2780 goto out_put;
2781 }
2782
2783 mcast->lid = cmd.mlid;
2784 memcpy(mcast->gid.raw, cmd.gid, sizeof mcast->gid.raw);
2785
2786 ret = ib_attach_mcast(qp, &mcast->gid, cmd.mlid);
2787 if (!ret)
2788 list_add_tail(&mcast->list, &obj->mcast_list);
2789 else
2790 kfree(mcast);
2791
2792 out_put:
2793 put_qp_write(qp);
2794
2795 return ret ? ret : in_len;
2796 }
2797
2798 ssize_t ib_uverbs_detach_mcast(struct ib_uverbs_file *file,
2799 const char __user *buf, int in_len,
2800 int out_len)
2801 {
2802 struct ib_uverbs_detach_mcast cmd;
2803 struct ib_uqp_object *obj;
2804 struct ib_qp *qp;
2805 struct ib_uverbs_mcast_entry *mcast;
2806 int ret = -EINVAL;
2807
2808 if (copy_from_user(&cmd, buf, sizeof cmd))
2809 return -EFAULT;
2810
2811 qp = idr_write_qp(cmd.qp_handle, file->ucontext);
2812 if (!qp)
2813 return -EINVAL;
2814
2815 ret = ib_detach_mcast(qp, (union ib_gid *) cmd.gid, cmd.mlid);
2816 if (ret)
2817 goto out_put;
2818
2819 obj = container_of(qp->uobject, struct ib_uqp_object, uevent.uobject);
2820
2821 list_for_each_entry(mcast, &obj->mcast_list, list)
2822 if (cmd.mlid == mcast->lid &&
2823 !memcmp(cmd.gid, mcast->gid.raw, sizeof mcast->gid.raw)) {
2824 list_del(&mcast->list);
2825 kfree(mcast);
2826 break;
2827 }
2828
2829 out_put:
2830 put_qp_write(qp);
2831
2832 return ret ? ret : in_len;
2833 }
2834
2835 static int kern_spec_to_ib_spec(struct ib_uverbs_flow_spec *kern_spec,
2836 union ib_flow_spec *ib_spec)
2837 {
2838 if (kern_spec->reserved)
2839 return -EINVAL;
2840
2841 ib_spec->type = kern_spec->type;
2842
2843 switch (ib_spec->type) {
2844 case IB_FLOW_SPEC_ETH:
2845 ib_spec->eth.size = sizeof(struct ib_flow_spec_eth);
2846 if (ib_spec->eth.size != kern_spec->eth.size)
2847 return -EINVAL;
2848 memcpy(&ib_spec->eth.val, &kern_spec->eth.val,
2849 sizeof(struct ib_flow_eth_filter));
2850 memcpy(&ib_spec->eth.mask, &kern_spec->eth.mask,
2851 sizeof(struct ib_flow_eth_filter));
2852 break;
2853 case IB_FLOW_SPEC_IPV4:
2854 ib_spec->ipv4.size = sizeof(struct ib_flow_spec_ipv4);
2855 if (ib_spec->ipv4.size != kern_spec->ipv4.size)
2856 return -EINVAL;
2857 memcpy(&ib_spec->ipv4.val, &kern_spec->ipv4.val,
2858 sizeof(struct ib_flow_ipv4_filter));
2859 memcpy(&ib_spec->ipv4.mask, &kern_spec->ipv4.mask,
2860 sizeof(struct ib_flow_ipv4_filter));
2861 break;
2862 case IB_FLOW_SPEC_TCP:
2863 case IB_FLOW_SPEC_UDP:
2864 ib_spec->tcp_udp.size = sizeof(struct ib_flow_spec_tcp_udp);
2865 if (ib_spec->tcp_udp.size != kern_spec->tcp_udp.size)
2866 return -EINVAL;
2867 memcpy(&ib_spec->tcp_udp.val, &kern_spec->tcp_udp.val,
2868 sizeof(struct ib_flow_tcp_udp_filter));
2869 memcpy(&ib_spec->tcp_udp.mask, &kern_spec->tcp_udp.mask,
2870 sizeof(struct ib_flow_tcp_udp_filter));
2871 break;
2872 default:
2873 return -EINVAL;
2874 }
2875 return 0;
2876 }
2877
2878 int ib_uverbs_ex_create_flow(struct ib_uverbs_file *file,
2879 struct ib_udata *ucore,
2880 struct ib_udata *uhw)
2881 {
2882 struct ib_uverbs_create_flow cmd;
2883 struct ib_uverbs_create_flow_resp resp;
2884 struct ib_uobject *uobj;
2885 struct ib_flow *flow_id;
2886 struct ib_uverbs_flow_attr *kern_flow_attr;
2887 struct ib_flow_attr *flow_attr;
2888 struct ib_qp *qp;
2889 int err = 0;
2890 void *kern_spec;
2891 void *ib_spec;
2892 int i;
2893
2894 if (ucore->inlen < sizeof(cmd))
2895 return -EINVAL;
2896
2897 if (ucore->outlen < sizeof(resp))
2898 return -ENOSPC;
2899
2900 err = ib_copy_from_udata(&cmd, ucore, sizeof(cmd));
2901 if (err)
2902 return err;
2903
2904 ucore->inbuf += sizeof(cmd);
2905 ucore->inlen -= sizeof(cmd);
2906
2907 if (cmd.comp_mask)
2908 return -EINVAL;
2909
2910 if ((cmd.flow_attr.type == IB_FLOW_ATTR_SNIFFER &&
2911 !capable(CAP_NET_ADMIN)) || !capable(CAP_NET_RAW))
2912 return -EPERM;
2913
2914 if (cmd.flow_attr.num_of_specs > IB_FLOW_SPEC_SUPPORT_LAYERS)
2915 return -EINVAL;
2916
2917 if (cmd.flow_attr.size > ucore->inlen ||
2918 cmd.flow_attr.size >
2919 (cmd.flow_attr.num_of_specs * sizeof(struct ib_uverbs_flow_spec)))
2920 return -EINVAL;
2921
2922 if (cmd.flow_attr.reserved[0] ||
2923 cmd.flow_attr.reserved[1])
2924 return -EINVAL;
2925
2926 if (cmd.flow_attr.num_of_specs) {
2927 kern_flow_attr = kmalloc(sizeof(*kern_flow_attr) + cmd.flow_attr.size,
2928 GFP_KERNEL);
2929 if (!kern_flow_attr)
2930 return -ENOMEM;
2931
2932 memcpy(kern_flow_attr, &cmd.flow_attr, sizeof(*kern_flow_attr));
2933 err = ib_copy_from_udata(kern_flow_attr + 1, ucore,
2934 cmd.flow_attr.size);
2935 if (err)
2936 goto err_free_attr;
2937 } else {
2938 kern_flow_attr = &cmd.flow_attr;
2939 }
2940
2941 uobj = kmalloc(sizeof(*uobj), GFP_KERNEL);
2942 if (!uobj) {
2943 err = -ENOMEM;
2944 goto err_free_attr;
2945 }
2946 init_uobj(uobj, 0, file->ucontext, &rule_lock_class);
2947 down_write(&uobj->mutex);
2948
2949 qp = idr_read_qp(cmd.qp_handle, file->ucontext);
2950 if (!qp) {
2951 err = -EINVAL;
2952 goto err_uobj;
2953 }
2954
2955 flow_attr = kmalloc(sizeof(*flow_attr) + cmd.flow_attr.size, GFP_KERNEL);
2956 if (!flow_attr) {
2957 err = -ENOMEM;
2958 goto err_put;
2959 }
2960
2961 flow_attr->type = kern_flow_attr->type;
2962 flow_attr->priority = kern_flow_attr->priority;
2963 flow_attr->num_of_specs = kern_flow_attr->num_of_specs;
2964 flow_attr->port = kern_flow_attr->port;
2965 flow_attr->flags = kern_flow_attr->flags;
2966 flow_attr->size = sizeof(*flow_attr);
2967
2968 kern_spec = kern_flow_attr + 1;
2969 ib_spec = flow_attr + 1;
2970 for (i = 0; i < flow_attr->num_of_specs &&
2971 cmd.flow_attr.size > offsetof(struct ib_uverbs_flow_spec, reserved) &&
2972 cmd.flow_attr.size >=
2973 ((struct ib_uverbs_flow_spec *)kern_spec)->size; i++) {
2974 err = kern_spec_to_ib_spec(kern_spec, ib_spec);
2975 if (err)
2976 goto err_free;
2977 flow_attr->size +=
2978 ((union ib_flow_spec *) ib_spec)->size;
2979 cmd.flow_attr.size -= ((struct ib_uverbs_flow_spec *)kern_spec)->size;
2980 kern_spec += ((struct ib_uverbs_flow_spec *) kern_spec)->size;
2981 ib_spec += ((union ib_flow_spec *) ib_spec)->size;
2982 }
2983 if (cmd.flow_attr.size || (i != flow_attr->num_of_specs)) {
2984 pr_warn("create flow failed, flow %d: %d bytes left from uverb cmd\n",
2985 i, cmd.flow_attr.size);
2986 err = -EINVAL;
2987 goto err_free;
2988 }
2989 flow_id = ib_create_flow(qp, flow_attr, IB_FLOW_DOMAIN_USER);
2990 if (IS_ERR(flow_id)) {
2991 err = PTR_ERR(flow_id);
2992 goto err_free;
2993 }
2994 flow_id->qp = qp;
2995 flow_id->uobject = uobj;
2996 uobj->object = flow_id;
2997
2998 err = idr_add_uobj(&ib_uverbs_rule_idr, uobj);
2999 if (err)
3000 goto destroy_flow;
3001
3002 memset(&resp, 0, sizeof(resp));
3003 resp.flow_handle = uobj->id;
3004
3005 err = ib_copy_to_udata(ucore,
3006 &resp, sizeof(resp));
3007 if (err)
3008 goto err_copy;
3009
3010 put_qp_read(qp);
3011 mutex_lock(&file->mutex);
3012 list_add_tail(&uobj->list, &file->ucontext->rule_list);
3013 mutex_unlock(&file->mutex);
3014
3015 uobj->live = 1;
3016
3017 up_write(&uobj->mutex);
3018 kfree(flow_attr);
3019 if (cmd.flow_attr.num_of_specs)
3020 kfree(kern_flow_attr);
3021 return 0;
3022 err_copy:
3023 idr_remove_uobj(&ib_uverbs_rule_idr, uobj);
3024 destroy_flow:
3025 ib_destroy_flow(flow_id);
3026 err_free:
3027 kfree(flow_attr);
3028 err_put:
3029 put_qp_read(qp);
3030 err_uobj:
3031 put_uobj_write(uobj);
3032 err_free_attr:
3033 if (cmd.flow_attr.num_of_specs)
3034 kfree(kern_flow_attr);
3035 return err;
3036 }
3037
3038 int ib_uverbs_ex_destroy_flow(struct ib_uverbs_file *file,
3039 struct ib_udata *ucore,
3040 struct ib_udata *uhw)
3041 {
3042 struct ib_uverbs_destroy_flow cmd;
3043 struct ib_flow *flow_id;
3044 struct ib_uobject *uobj;
3045 int ret;
3046
3047 if (ucore->inlen < sizeof(cmd))
3048 return -EINVAL;
3049
3050 ret = ib_copy_from_udata(&cmd, ucore, sizeof(cmd));
3051 if (ret)
3052 return ret;
3053
3054 if (cmd.comp_mask)
3055 return -EINVAL;
3056
3057 uobj = idr_write_uobj(&ib_uverbs_rule_idr, cmd.flow_handle,
3058 file->ucontext);
3059 if (!uobj)
3060 return -EINVAL;
3061 flow_id = uobj->object;
3062
3063 ret = ib_destroy_flow(flow_id);
3064 if (!ret)
3065 uobj->live = 0;
3066
3067 put_uobj_write(uobj);
3068
3069 idr_remove_uobj(&ib_uverbs_rule_idr, uobj);
3070
3071 mutex_lock(&file->mutex);
3072 list_del(&uobj->list);
3073 mutex_unlock(&file->mutex);
3074
3075 put_uobj(uobj);
3076
3077 return ret;
3078 }
3079
3080 static int __uverbs_create_xsrq(struct ib_uverbs_file *file,
3081 struct ib_uverbs_create_xsrq *cmd,
3082 struct ib_udata *udata)
3083 {
3084 struct ib_uverbs_create_srq_resp resp;
3085 struct ib_usrq_object *obj;
3086 struct ib_pd *pd;
3087 struct ib_srq *srq;
3088 struct ib_uobject *uninitialized_var(xrcd_uobj);
3089 struct ib_srq_init_attr attr;
3090 int ret;
3091
3092 obj = kmalloc(sizeof *obj, GFP_KERNEL);
3093 if (!obj)
3094 return -ENOMEM;
3095
3096 init_uobj(&obj->uevent.uobject, cmd->user_handle, file->ucontext, &srq_lock_class);
3097 down_write(&obj->uevent.uobject.mutex);
3098
3099 if (cmd->srq_type == IB_SRQT_XRC) {
3100 attr.ext.xrc.xrcd = idr_read_xrcd(cmd->xrcd_handle, file->ucontext, &xrcd_uobj);
3101 if (!attr.ext.xrc.xrcd) {
3102 ret = -EINVAL;
3103 goto err;
3104 }
3105
3106 obj->uxrcd = container_of(xrcd_uobj, struct ib_uxrcd_object, uobject);
3107 atomic_inc(&obj->uxrcd->refcnt);
3108
3109 attr.ext.xrc.cq = idr_read_cq(cmd->cq_handle, file->ucontext, 0);
3110 if (!attr.ext.xrc.cq) {
3111 ret = -EINVAL;
3112 goto err_put_xrcd;
3113 }
3114 }
3115
3116 pd = idr_read_pd(cmd->pd_handle, file->ucontext);
3117 if (!pd) {
3118 ret = -EINVAL;
3119 goto err_put_cq;
3120 }
3121
3122 attr.event_handler = ib_uverbs_srq_event_handler;
3123 attr.srq_context = file;
3124 attr.srq_type = cmd->srq_type;
3125 attr.attr.max_wr = cmd->max_wr;
3126 attr.attr.max_sge = cmd->max_sge;
3127 attr.attr.srq_limit = cmd->srq_limit;
3128
3129 obj->uevent.events_reported = 0;
3130 INIT_LIST_HEAD(&obj->uevent.event_list);
3131
3132 srq = pd->device->create_srq(pd, &attr, udata);
3133 if (IS_ERR(srq)) {
3134 ret = PTR_ERR(srq);
3135 goto err_put;
3136 }
3137
3138 srq->device = pd->device;
3139 srq->pd = pd;
3140 srq->srq_type = cmd->srq_type;
3141 srq->uobject = &obj->uevent.uobject;
3142 srq->event_handler = attr.event_handler;
3143 srq->srq_context = attr.srq_context;
3144
3145 if (cmd->srq_type == IB_SRQT_XRC) {
3146 srq->ext.xrc.cq = attr.ext.xrc.cq;
3147 srq->ext.xrc.xrcd = attr.ext.xrc.xrcd;
3148 atomic_inc(&attr.ext.xrc.cq->usecnt);
3149 atomic_inc(&attr.ext.xrc.xrcd->usecnt);
3150 }
3151
3152 atomic_inc(&pd->usecnt);
3153 atomic_set(&srq->usecnt, 0);
3154
3155 obj->uevent.uobject.object = srq;
3156 ret = idr_add_uobj(&ib_uverbs_srq_idr, &obj->uevent.uobject);
3157 if (ret)
3158 goto err_destroy;
3159
3160 memset(&resp, 0, sizeof resp);
3161 resp.srq_handle = obj->uevent.uobject.id;
3162 resp.max_wr = attr.attr.max_wr;
3163 resp.max_sge = attr.attr.max_sge;
3164 if (cmd->srq_type == IB_SRQT_XRC)
3165 resp.srqn = srq->ext.xrc.srq_num;
3166
3167 if (copy_to_user((void __user *) (unsigned long) cmd->response,
3168 &resp, sizeof resp)) {
3169 ret = -EFAULT;
3170 goto err_copy;
3171 }
3172
3173 if (cmd->srq_type == IB_SRQT_XRC) {
3174 put_uobj_read(xrcd_uobj);
3175 put_cq_read(attr.ext.xrc.cq);
3176 }
3177 put_pd_read(pd);
3178
3179 mutex_lock(&file->mutex);
3180 list_add_tail(&obj->uevent.uobject.list, &file->ucontext->srq_list);
3181 mutex_unlock(&file->mutex);
3182
3183 obj->uevent.uobject.live = 1;
3184
3185 up_write(&obj->uevent.uobject.mutex);
3186
3187 return 0;
3188
3189 err_copy:
3190 idr_remove_uobj(&ib_uverbs_srq_idr, &obj->uevent.uobject);
3191
3192 err_destroy:
3193 ib_destroy_srq(srq);
3194
3195 err_put:
3196 put_pd_read(pd);
3197
3198 err_put_cq:
3199 if (cmd->srq_type == IB_SRQT_XRC)
3200 put_cq_read(attr.ext.xrc.cq);
3201
3202 err_put_xrcd:
3203 if (cmd->srq_type == IB_SRQT_XRC) {
3204 atomic_dec(&obj->uxrcd->refcnt);
3205 put_uobj_read(xrcd_uobj);
3206 }
3207
3208 err:
3209 put_uobj_write(&obj->uevent.uobject);
3210 return ret;
3211 }
3212
3213 ssize_t ib_uverbs_create_srq(struct ib_uverbs_file *file,
3214 const char __user *buf, int in_len,
3215 int out_len)
3216 {
3217 struct ib_uverbs_create_srq cmd;
3218 struct ib_uverbs_create_xsrq xcmd;
3219 struct ib_uverbs_create_srq_resp resp;
3220 struct ib_udata udata;
3221 int ret;
3222
3223 if (out_len < sizeof resp)
3224 return -ENOSPC;
3225
3226 if (copy_from_user(&cmd, buf, sizeof cmd))
3227 return -EFAULT;
3228
3229 xcmd.response = cmd.response;
3230 xcmd.user_handle = cmd.user_handle;
3231 xcmd.srq_type = IB_SRQT_BASIC;
3232 xcmd.pd_handle = cmd.pd_handle;
3233 xcmd.max_wr = cmd.max_wr;
3234 xcmd.max_sge = cmd.max_sge;
3235 xcmd.srq_limit = cmd.srq_limit;
3236
3237 INIT_UDATA(&udata, buf + sizeof cmd,
3238 (unsigned long) cmd.response + sizeof resp,
3239 in_len - sizeof cmd, out_len - sizeof resp);
3240
3241 ret = __uverbs_create_xsrq(file, &xcmd, &udata);
3242 if (ret)
3243 return ret;
3244
3245 return in_len;
3246 }
3247
3248 ssize_t ib_uverbs_create_xsrq(struct ib_uverbs_file *file,
3249 const char __user *buf, int in_len, int out_len)
3250 {
3251 struct ib_uverbs_create_xsrq cmd;
3252 struct ib_uverbs_create_srq_resp resp;
3253 struct ib_udata udata;
3254 int ret;
3255
3256 if (out_len < sizeof resp)
3257 return -ENOSPC;
3258
3259 if (copy_from_user(&cmd, buf, sizeof cmd))
3260 return -EFAULT;
3261
3262 INIT_UDATA(&udata, buf + sizeof cmd,
3263 (unsigned long) cmd.response + sizeof resp,
3264 in_len - sizeof cmd, out_len - sizeof resp);
3265
3266 ret = __uverbs_create_xsrq(file, &cmd, &udata);
3267 if (ret)
3268 return ret;
3269
3270 return in_len;
3271 }
3272
3273 ssize_t ib_uverbs_modify_srq(struct ib_uverbs_file *file,
3274 const char __user *buf, int in_len,
3275 int out_len)
3276 {
3277 struct ib_uverbs_modify_srq cmd;
3278 struct ib_udata udata;
3279 struct ib_srq *srq;
3280 struct ib_srq_attr attr;
3281 int ret;
3282
3283 if (copy_from_user(&cmd, buf, sizeof cmd))
3284 return -EFAULT;
3285
3286 INIT_UDATA(&udata, buf + sizeof cmd, NULL, in_len - sizeof cmd,
3287 out_len);
3288
3289 srq = idr_read_srq(cmd.srq_handle, file->ucontext);
3290 if (!srq)
3291 return -EINVAL;
3292
3293 attr.max_wr = cmd.max_wr;
3294 attr.srq_limit = cmd.srq_limit;
3295
3296 ret = srq->device->modify_srq(srq, &attr, cmd.attr_mask, &udata);
3297
3298 put_srq_read(srq);
3299
3300 return ret ? ret : in_len;
3301 }
3302
3303 ssize_t ib_uverbs_query_srq(struct ib_uverbs_file *file,
3304 const char __user *buf,
3305 int in_len, int out_len)
3306 {
3307 struct ib_uverbs_query_srq cmd;
3308 struct ib_uverbs_query_srq_resp resp;
3309 struct ib_srq_attr attr;
3310 struct ib_srq *srq;
3311 int ret;
3312
3313 if (out_len < sizeof resp)
3314 return -ENOSPC;
3315
3316 if (copy_from_user(&cmd, buf, sizeof cmd))
3317 return -EFAULT;
3318
3319 srq = idr_read_srq(cmd.srq_handle, file->ucontext);
3320 if (!srq)
3321 return -EINVAL;
3322
3323 ret = ib_query_srq(srq, &attr);
3324
3325 put_srq_read(srq);
3326
3327 if (ret)
3328 return ret;
3329
3330 memset(&resp, 0, sizeof resp);
3331
3332 resp.max_wr = attr.max_wr;
3333 resp.max_sge = attr.max_sge;
3334 resp.srq_limit = attr.srq_limit;
3335
3336 if (copy_to_user((void __user *) (unsigned long) cmd.response,
3337 &resp, sizeof resp))
3338 return -EFAULT;
3339
3340 return in_len;
3341 }
3342
3343 ssize_t ib_uverbs_destroy_srq(struct ib_uverbs_file *file,
3344 const char __user *buf, int in_len,
3345 int out_len)
3346 {
3347 struct ib_uverbs_destroy_srq cmd;
3348 struct ib_uverbs_destroy_srq_resp resp;
3349 struct ib_uobject *uobj;
3350 struct ib_srq *srq;
3351 struct ib_uevent_object *obj;
3352 int ret = -EINVAL;
3353 struct ib_usrq_object *us;
3354 enum ib_srq_type srq_type;
3355
3356 if (copy_from_user(&cmd, buf, sizeof cmd))
3357 return -EFAULT;
3358
3359 uobj = idr_write_uobj(&ib_uverbs_srq_idr, cmd.srq_handle, file->ucontext);
3360 if (!uobj)
3361 return -EINVAL;
3362 srq = uobj->object;
3363 obj = container_of(uobj, struct ib_uevent_object, uobject);
3364 srq_type = srq->srq_type;
3365
3366 ret = ib_destroy_srq(srq);
3367 if (!ret)
3368 uobj->live = 0;
3369
3370 put_uobj_write(uobj);
3371
3372 if (ret)
3373 return ret;
3374
3375 if (srq_type == IB_SRQT_XRC) {
3376 us = container_of(obj, struct ib_usrq_object, uevent);
3377 atomic_dec(&us->uxrcd->refcnt);
3378 }
3379
3380 idr_remove_uobj(&ib_uverbs_srq_idr, uobj);
3381
3382 mutex_lock(&file->mutex);
3383 list_del(&uobj->list);
3384 mutex_unlock(&file->mutex);
3385
3386 ib_uverbs_release_uevent(file, obj);
3387
3388 memset(&resp, 0, sizeof resp);
3389 resp.events_reported = obj->events_reported;
3390
3391 put_uobj(uobj);
3392
3393 if (copy_to_user((void __user *) (unsigned long) cmd.response,
3394 &resp, sizeof resp))
3395 ret = -EFAULT;
3396
3397 return ret ? ret : in_len;
3398 }
3399
3400 int ib_uverbs_ex_query_device(struct ib_uverbs_file *file,
3401 struct ib_udata *ucore,
3402 struct ib_udata *uhw)
3403 {
3404 struct ib_uverbs_ex_query_device_resp resp;
3405 struct ib_uverbs_ex_query_device cmd;
3406 struct ib_device_attr attr;
3407 struct ib_device *device;
3408 int err;
3409
3410 device = file->device->ib_dev;
3411 if (ucore->inlen < sizeof(cmd))
3412 return -EINVAL;
3413
3414 err = ib_copy_from_udata(&cmd, ucore, sizeof(cmd));
3415 if (err)
3416 return err;
3417
3418 if (cmd.comp_mask)
3419 return -EINVAL;
3420
3421 if (cmd.reserved)
3422 return -EINVAL;
3423
3424 resp.response_length = offsetof(typeof(resp), odp_caps);
3425
3426 if (ucore->outlen < resp.response_length)
3427 return -ENOSPC;
3428
3429 memset(&attr, 0, sizeof(attr));
3430
3431 err = device->query_device(device, &attr);
3432 if (err)
3433 return err;
3434
3435 copy_query_dev_fields(file, &resp.base, &attr);
3436 resp.comp_mask = 0;
3437
3438 if (ucore->outlen < resp.response_length + sizeof(resp.odp_caps))
3439 goto end;
3440
3441 #ifdef CONFIG_INFINIBAND_ON_DEMAND_PAGING
3442 resp.odp_caps.general_caps = attr.odp_caps.general_caps;
3443 resp.odp_caps.per_transport_caps.rc_odp_caps =
3444 attr.odp_caps.per_transport_caps.rc_odp_caps;
3445 resp.odp_caps.per_transport_caps.uc_odp_caps =
3446 attr.odp_caps.per_transport_caps.uc_odp_caps;
3447 resp.odp_caps.per_transport_caps.ud_odp_caps =
3448 attr.odp_caps.per_transport_caps.ud_odp_caps;
3449 resp.odp_caps.reserved = 0;
3450 #else
3451 memset(&resp.odp_caps, 0, sizeof(resp.odp_caps));
3452 #endif
3453 resp.response_length += sizeof(resp.odp_caps);
3454
3455 if (ucore->outlen < resp.response_length + sizeof(resp.timestamp_mask))
3456 goto end;
3457
3458 resp.timestamp_mask = attr.timestamp_mask;
3459 resp.response_length += sizeof(resp.timestamp_mask);
3460
3461 if (ucore->outlen < resp.response_length + sizeof(resp.hca_core_clock))
3462 goto end;
3463
3464 resp.hca_core_clock = attr.hca_core_clock;
3465 resp.response_length += sizeof(resp.hca_core_clock);
3466
3467 end:
3468 err = ib_copy_to_udata(ucore, &resp, resp.response_length);
3469 if (err)
3470 return err;
3471
3472 return 0;
3473 }
Linux kernel - Deliverables
This page took 0.125717 seconds and 5 git commands to generate.