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Merge branch 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs
[mirror_ubuntu-artful-kernel.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 ssize_t ib_uverbs_create_cq(struct ib_uverbs_file *file,
1334 const char __user *buf, int in_len,
1335 int out_len)
1336 {
1337 struct ib_uverbs_create_cq cmd;
1338 struct ib_uverbs_create_cq_resp resp;
1339 struct ib_udata udata;
1340 struct ib_ucq_object *obj;
1341 struct ib_uverbs_event_file *ev_file = NULL;
1342 struct ib_cq *cq;
1343 int ret;
1344
1345 if (out_len < sizeof resp)
1346 return -ENOSPC;
1347
1348 if (copy_from_user(&cmd, buf, sizeof cmd))
1349 return -EFAULT;
1350
1351 INIT_UDATA(&udata, buf + sizeof cmd,
1352 (unsigned long) cmd.response + sizeof resp,
1353 in_len - sizeof cmd, out_len - sizeof resp);
1354
1355 if (cmd.comp_vector >= file->device->num_comp_vectors)
1356 return -EINVAL;
1357
1358 obj = kmalloc(sizeof *obj, GFP_KERNEL);
1359 if (!obj)
1360 return -ENOMEM;
1361
1362 init_uobj(&obj->uobject, cmd.user_handle, file->ucontext, &cq_lock_class);
1363 down_write(&obj->uobject.mutex);
1364
1365 if (cmd.comp_channel >= 0) {
1366 ev_file = ib_uverbs_lookup_comp_file(cmd.comp_channel);
1367 if (!ev_file) {
1368 ret = -EINVAL;
1369 goto err;
1370 }
1371 }
1372
1373 obj->uverbs_file = file;
1374 obj->comp_events_reported = 0;
1375 obj->async_events_reported = 0;
1376 INIT_LIST_HEAD(&obj->comp_list);
1377 INIT_LIST_HEAD(&obj->async_list);
1378
1379 cq = file->device->ib_dev->create_cq(file->device->ib_dev, cmd.cqe,
1380 cmd.comp_vector,
1381 file->ucontext, &udata);
1382 if (IS_ERR(cq)) {
1383 ret = PTR_ERR(cq);
1384 goto err_file;
1385 }
1386
1387 cq->device = file->device->ib_dev;
1388 cq->uobject = &obj->uobject;
1389 cq->comp_handler = ib_uverbs_comp_handler;
1390 cq->event_handler = ib_uverbs_cq_event_handler;
1391 cq->cq_context = ev_file;
1392 atomic_set(&cq->usecnt, 0);
1393
1394 obj->uobject.object = cq;
1395 ret = idr_add_uobj(&ib_uverbs_cq_idr, &obj->uobject);
1396 if (ret)
1397 goto err_free;
1398
1399 memset(&resp, 0, sizeof resp);
1400 resp.cq_handle = obj->uobject.id;
1401 resp.cqe = cq->cqe;
1402
1403 if (copy_to_user((void __user *) (unsigned long) cmd.response,
1404 &resp, sizeof resp)) {
1405 ret = -EFAULT;
1406 goto err_copy;
1407 }
1408
1409 mutex_lock(&file->mutex);
1410 list_add_tail(&obj->uobject.list, &file->ucontext->cq_list);
1411 mutex_unlock(&file->mutex);
1412
1413 obj->uobject.live = 1;
1414
1415 up_write(&obj->uobject.mutex);
1416
1417 return in_len;
1418
1419 err_copy:
1420 idr_remove_uobj(&ib_uverbs_cq_idr, &obj->uobject);
1421
1422 err_free:
1423 ib_destroy_cq(cq);
1424
1425 err_file:
1426 if (ev_file)
1427 ib_uverbs_release_ucq(file, ev_file, obj);
1428
1429 err:
1430 put_uobj_write(&obj->uobject);
1431 return ret;
1432 }
1433
1434 ssize_t ib_uverbs_resize_cq(struct ib_uverbs_file *file,
1435 const char __user *buf, int in_len,
1436 int out_len)
1437 {
1438 struct ib_uverbs_resize_cq cmd;
1439 struct ib_uverbs_resize_cq_resp resp;
1440 struct ib_udata udata;
1441 struct ib_cq *cq;
1442 int ret = -EINVAL;
1443
1444 if (copy_from_user(&cmd, buf, sizeof cmd))
1445 return -EFAULT;
1446
1447 INIT_UDATA(&udata, buf + sizeof cmd,
1448 (unsigned long) cmd.response + sizeof resp,
1449 in_len - sizeof cmd, out_len - sizeof resp);
1450
1451 cq = idr_read_cq(cmd.cq_handle, file->ucontext, 0);
1452 if (!cq)
1453 return -EINVAL;
1454
1455 ret = cq->device->resize_cq(cq, cmd.cqe, &udata);
1456 if (ret)
1457 goto out;
1458
1459 resp.cqe = cq->cqe;
1460
1461 if (copy_to_user((void __user *) (unsigned long) cmd.response,
1462 &resp, sizeof resp.cqe))
1463 ret = -EFAULT;
1464
1465 out:
1466 put_cq_read(cq);
1467
1468 return ret ? ret : in_len;
1469 }
1470
1471 static int copy_wc_to_user(void __user *dest, struct ib_wc *wc)
1472 {
1473 struct ib_uverbs_wc tmp;
1474
1475 tmp.wr_id = wc->wr_id;
1476 tmp.status = wc->status;
1477 tmp.opcode = wc->opcode;
1478 tmp.vendor_err = wc->vendor_err;
1479 tmp.byte_len = wc->byte_len;
1480 tmp.ex.imm_data = (__u32 __force) wc->ex.imm_data;
1481 tmp.qp_num = wc->qp->qp_num;
1482 tmp.src_qp = wc->src_qp;
1483 tmp.wc_flags = wc->wc_flags;
1484 tmp.pkey_index = wc->pkey_index;
1485 tmp.slid = wc->slid;
1486 tmp.sl = wc->sl;
1487 tmp.dlid_path_bits = wc->dlid_path_bits;
1488 tmp.port_num = wc->port_num;
1489 tmp.reserved = 0;
1490
1491 if (copy_to_user(dest, &tmp, sizeof tmp))
1492 return -EFAULT;
1493
1494 return 0;
1495 }
1496
1497 ssize_t ib_uverbs_poll_cq(struct ib_uverbs_file *file,
1498 const char __user *buf, int in_len,
1499 int out_len)
1500 {
1501 struct ib_uverbs_poll_cq cmd;
1502 struct ib_uverbs_poll_cq_resp resp;
1503 u8 __user *header_ptr;
1504 u8 __user *data_ptr;
1505 struct ib_cq *cq;
1506 struct ib_wc wc;
1507 int ret;
1508
1509 if (copy_from_user(&cmd, buf, sizeof cmd))
1510 return -EFAULT;
1511
1512 cq = idr_read_cq(cmd.cq_handle, file->ucontext, 0);
1513 if (!cq)
1514 return -EINVAL;
1515
1516 /* we copy a struct ib_uverbs_poll_cq_resp to user space */
1517 header_ptr = (void __user *)(unsigned long) cmd.response;
1518 data_ptr = header_ptr + sizeof resp;
1519
1520 memset(&resp, 0, sizeof resp);
1521 while (resp.count < cmd.ne) {
1522 ret = ib_poll_cq(cq, 1, &wc);
1523 if (ret < 0)
1524 goto out_put;
1525 if (!ret)
1526 break;
1527
1528 ret = copy_wc_to_user(data_ptr, &wc);
1529 if (ret)
1530 goto out_put;
1531
1532 data_ptr += sizeof(struct ib_uverbs_wc);
1533 ++resp.count;
1534 }
1535
1536 if (copy_to_user(header_ptr, &resp, sizeof resp)) {
1537 ret = -EFAULT;
1538 goto out_put;
1539 }
1540
1541 ret = in_len;
1542
1543 out_put:
1544 put_cq_read(cq);
1545 return ret;
1546 }
1547
1548 ssize_t ib_uverbs_req_notify_cq(struct ib_uverbs_file *file,
1549 const char __user *buf, int in_len,
1550 int out_len)
1551 {
1552 struct ib_uverbs_req_notify_cq cmd;
1553 struct ib_cq *cq;
1554
1555 if (copy_from_user(&cmd, buf, sizeof cmd))
1556 return -EFAULT;
1557
1558 cq = idr_read_cq(cmd.cq_handle, file->ucontext, 0);
1559 if (!cq)
1560 return -EINVAL;
1561
1562 ib_req_notify_cq(cq, cmd.solicited_only ?
1563 IB_CQ_SOLICITED : IB_CQ_NEXT_COMP);
1564
1565 put_cq_read(cq);
1566
1567 return in_len;
1568 }
1569
1570 ssize_t ib_uverbs_destroy_cq(struct ib_uverbs_file *file,
1571 const char __user *buf, int in_len,
1572 int out_len)
1573 {
1574 struct ib_uverbs_destroy_cq cmd;
1575 struct ib_uverbs_destroy_cq_resp resp;
1576 struct ib_uobject *uobj;
1577 struct ib_cq *cq;
1578 struct ib_ucq_object *obj;
1579 struct ib_uverbs_event_file *ev_file;
1580 int ret = -EINVAL;
1581
1582 if (copy_from_user(&cmd, buf, sizeof cmd))
1583 return -EFAULT;
1584
1585 uobj = idr_write_uobj(&ib_uverbs_cq_idr, cmd.cq_handle, file->ucontext);
1586 if (!uobj)
1587 return -EINVAL;
1588 cq = uobj->object;
1589 ev_file = cq->cq_context;
1590 obj = container_of(cq->uobject, struct ib_ucq_object, uobject);
1591
1592 ret = ib_destroy_cq(cq);
1593 if (!ret)
1594 uobj->live = 0;
1595
1596 put_uobj_write(uobj);
1597
1598 if (ret)
1599 return ret;
1600
1601 idr_remove_uobj(&ib_uverbs_cq_idr, uobj);
1602
1603 mutex_lock(&file->mutex);
1604 list_del(&uobj->list);
1605 mutex_unlock(&file->mutex);
1606
1607 ib_uverbs_release_ucq(file, ev_file, obj);
1608
1609 memset(&resp, 0, sizeof resp);
1610 resp.comp_events_reported = obj->comp_events_reported;
1611 resp.async_events_reported = obj->async_events_reported;
1612
1613 put_uobj(uobj);
1614
1615 if (copy_to_user((void __user *) (unsigned long) cmd.response,
1616 &resp, sizeof resp))
1617 return -EFAULT;
1618
1619 return in_len;
1620 }
1621
1622 ssize_t ib_uverbs_create_qp(struct ib_uverbs_file *file,
1623 const char __user *buf, int in_len,
1624 int out_len)
1625 {
1626 struct ib_uverbs_create_qp cmd;
1627 struct ib_uverbs_create_qp_resp resp;
1628 struct ib_udata udata;
1629 struct ib_uqp_object *obj;
1630 struct ib_device *device;
1631 struct ib_pd *pd = NULL;
1632 struct ib_xrcd *xrcd = NULL;
1633 struct ib_uobject *uninitialized_var(xrcd_uobj);
1634 struct ib_cq *scq = NULL, *rcq = NULL;
1635 struct ib_srq *srq = NULL;
1636 struct ib_qp *qp;
1637 struct ib_qp_init_attr attr;
1638 int ret;
1639
1640 if (out_len < sizeof resp)
1641 return -ENOSPC;
1642
1643 if (copy_from_user(&cmd, buf, sizeof cmd))
1644 return -EFAULT;
1645
1646 if (cmd.qp_type == IB_QPT_RAW_PACKET && !capable(CAP_NET_RAW))
1647 return -EPERM;
1648
1649 INIT_UDATA(&udata, buf + sizeof cmd,
1650 (unsigned long) cmd.response + sizeof resp,
1651 in_len - sizeof cmd, out_len - sizeof resp);
1652
1653 obj = kzalloc(sizeof *obj, GFP_KERNEL);
1654 if (!obj)
1655 return -ENOMEM;
1656
1657 init_uobj(&obj->uevent.uobject, cmd.user_handle, file->ucontext, &qp_lock_class);
1658 down_write(&obj->uevent.uobject.mutex);
1659
1660 if (cmd.qp_type == IB_QPT_XRC_TGT) {
1661 xrcd = idr_read_xrcd(cmd.pd_handle, file->ucontext, &xrcd_uobj);
1662 if (!xrcd) {
1663 ret = -EINVAL;
1664 goto err_put;
1665 }
1666 device = xrcd->device;
1667 } else {
1668 if (cmd.qp_type == IB_QPT_XRC_INI) {
1669 cmd.max_recv_wr = cmd.max_recv_sge = 0;
1670 } else {
1671 if (cmd.is_srq) {
1672 srq = idr_read_srq(cmd.srq_handle, file->ucontext);
1673 if (!srq || srq->srq_type != IB_SRQT_BASIC) {
1674 ret = -EINVAL;
1675 goto err_put;
1676 }
1677 }
1678
1679 if (cmd.recv_cq_handle != cmd.send_cq_handle) {
1680 rcq = idr_read_cq(cmd.recv_cq_handle, file->ucontext, 0);
1681 if (!rcq) {
1682 ret = -EINVAL;
1683 goto err_put;
1684 }
1685 }
1686 }
1687
1688 scq = idr_read_cq(cmd.send_cq_handle, file->ucontext, !!rcq);
1689 rcq = rcq ?: scq;
1690 pd = idr_read_pd(cmd.pd_handle, file->ucontext);
1691 if (!pd || !scq) {
1692 ret = -EINVAL;
1693 goto err_put;
1694 }
1695
1696 device = pd->device;
1697 }
1698
1699 attr.event_handler = ib_uverbs_qp_event_handler;
1700 attr.qp_context = file;
1701 attr.send_cq = scq;
1702 attr.recv_cq = rcq;
1703 attr.srq = srq;
1704 attr.xrcd = xrcd;
1705 attr.sq_sig_type = cmd.sq_sig_all ? IB_SIGNAL_ALL_WR : IB_SIGNAL_REQ_WR;
1706 attr.qp_type = cmd.qp_type;
1707 attr.create_flags = 0;
1708
1709 attr.cap.max_send_wr = cmd.max_send_wr;
1710 attr.cap.max_recv_wr = cmd.max_recv_wr;
1711 attr.cap.max_send_sge = cmd.max_send_sge;
1712 attr.cap.max_recv_sge = cmd.max_recv_sge;
1713 attr.cap.max_inline_data = cmd.max_inline_data;
1714
1715 obj->uevent.events_reported = 0;
1716 INIT_LIST_HEAD(&obj->uevent.event_list);
1717 INIT_LIST_HEAD(&obj->mcast_list);
1718
1719 if (cmd.qp_type == IB_QPT_XRC_TGT)
1720 qp = ib_create_qp(pd, &attr);
1721 else
1722 qp = device->create_qp(pd, &attr, &udata);
1723
1724 if (IS_ERR(qp)) {
1725 ret = PTR_ERR(qp);
1726 goto err_put;
1727 }
1728
1729 if (cmd.qp_type != IB_QPT_XRC_TGT) {
1730 qp->real_qp = qp;
1731 qp->device = device;
1732 qp->pd = pd;
1733 qp->send_cq = attr.send_cq;
1734 qp->recv_cq = attr.recv_cq;
1735 qp->srq = attr.srq;
1736 qp->event_handler = attr.event_handler;
1737 qp->qp_context = attr.qp_context;
1738 qp->qp_type = attr.qp_type;
1739 atomic_set(&qp->usecnt, 0);
1740 atomic_inc(&pd->usecnt);
1741 atomic_inc(&attr.send_cq->usecnt);
1742 if (attr.recv_cq)
1743 atomic_inc(&attr.recv_cq->usecnt);
1744 if (attr.srq)
1745 atomic_inc(&attr.srq->usecnt);
1746 }
1747 qp->uobject = &obj->uevent.uobject;
1748
1749 obj->uevent.uobject.object = qp;
1750 ret = idr_add_uobj(&ib_uverbs_qp_idr, &obj->uevent.uobject);
1751 if (ret)
1752 goto err_destroy;
1753
1754 memset(&resp, 0, sizeof resp);
1755 resp.qpn = qp->qp_num;
1756 resp.qp_handle = obj->uevent.uobject.id;
1757 resp.max_recv_sge = attr.cap.max_recv_sge;
1758 resp.max_send_sge = attr.cap.max_send_sge;
1759 resp.max_recv_wr = attr.cap.max_recv_wr;
1760 resp.max_send_wr = attr.cap.max_send_wr;
1761 resp.max_inline_data = attr.cap.max_inline_data;
1762
1763 if (copy_to_user((void __user *) (unsigned long) cmd.response,
1764 &resp, sizeof resp)) {
1765 ret = -EFAULT;
1766 goto err_copy;
1767 }
1768
1769 if (xrcd) {
1770 obj->uxrcd = container_of(xrcd_uobj, struct ib_uxrcd_object,
1771 uobject);
1772 atomic_inc(&obj->uxrcd->refcnt);
1773 put_xrcd_read(xrcd_uobj);
1774 }
1775
1776 if (pd)
1777 put_pd_read(pd);
1778 if (scq)
1779 put_cq_read(scq);
1780 if (rcq && rcq != scq)
1781 put_cq_read(rcq);
1782 if (srq)
1783 put_srq_read(srq);
1784
1785 mutex_lock(&file->mutex);
1786 list_add_tail(&obj->uevent.uobject.list, &file->ucontext->qp_list);
1787 mutex_unlock(&file->mutex);
1788
1789 obj->uevent.uobject.live = 1;
1790
1791 up_write(&obj->uevent.uobject.mutex);
1792
1793 return in_len;
1794
1795 err_copy:
1796 idr_remove_uobj(&ib_uverbs_qp_idr, &obj->uevent.uobject);
1797
1798 err_destroy:
1799 ib_destroy_qp(qp);
1800
1801 err_put:
1802 if (xrcd)
1803 put_xrcd_read(xrcd_uobj);
1804 if (pd)
1805 put_pd_read(pd);
1806 if (scq)
1807 put_cq_read(scq);
1808 if (rcq && rcq != scq)
1809 put_cq_read(rcq);
1810 if (srq)
1811 put_srq_read(srq);
1812
1813 put_uobj_write(&obj->uevent.uobject);
1814 return ret;
1815 }
1816
1817 ssize_t ib_uverbs_open_qp(struct ib_uverbs_file *file,
1818 const char __user *buf, int in_len, int out_len)
1819 {
1820 struct ib_uverbs_open_qp cmd;
1821 struct ib_uverbs_create_qp_resp resp;
1822 struct ib_udata udata;
1823 struct ib_uqp_object *obj;
1824 struct ib_xrcd *xrcd;
1825 struct ib_uobject *uninitialized_var(xrcd_uobj);
1826 struct ib_qp *qp;
1827 struct ib_qp_open_attr attr;
1828 int ret;
1829
1830 if (out_len < sizeof resp)
1831 return -ENOSPC;
1832
1833 if (copy_from_user(&cmd, buf, sizeof cmd))
1834 return -EFAULT;
1835
1836 INIT_UDATA(&udata, buf + sizeof cmd,
1837 (unsigned long) cmd.response + sizeof resp,
1838 in_len - sizeof cmd, out_len - sizeof resp);
1839
1840 obj = kmalloc(sizeof *obj, GFP_KERNEL);
1841 if (!obj)
1842 return -ENOMEM;
1843
1844 init_uobj(&obj->uevent.uobject, cmd.user_handle, file->ucontext, &qp_lock_class);
1845 down_write(&obj->uevent.uobject.mutex);
1846
1847 xrcd = idr_read_xrcd(cmd.pd_handle, file->ucontext, &xrcd_uobj);
1848 if (!xrcd) {
1849 ret = -EINVAL;
1850 goto err_put;
1851 }
1852
1853 attr.event_handler = ib_uverbs_qp_event_handler;
1854 attr.qp_context = file;
1855 attr.qp_num = cmd.qpn;
1856 attr.qp_type = cmd.qp_type;
1857
1858 obj->uevent.events_reported = 0;
1859 INIT_LIST_HEAD(&obj->uevent.event_list);
1860 INIT_LIST_HEAD(&obj->mcast_list);
1861
1862 qp = ib_open_qp(xrcd, &attr);
1863 if (IS_ERR(qp)) {
1864 ret = PTR_ERR(qp);
1865 goto err_put;
1866 }
1867
1868 qp->uobject = &obj->uevent.uobject;
1869
1870 obj->uevent.uobject.object = qp;
1871 ret = idr_add_uobj(&ib_uverbs_qp_idr, &obj->uevent.uobject);
1872 if (ret)
1873 goto err_destroy;
1874
1875 memset(&resp, 0, sizeof resp);
1876 resp.qpn = qp->qp_num;
1877 resp.qp_handle = obj->uevent.uobject.id;
1878
1879 if (copy_to_user((void __user *) (unsigned long) cmd.response,
1880 &resp, sizeof resp)) {
1881 ret = -EFAULT;
1882 goto err_remove;
1883 }
1884
1885 obj->uxrcd = container_of(xrcd_uobj, struct ib_uxrcd_object, uobject);
1886 atomic_inc(&obj->uxrcd->refcnt);
1887 put_xrcd_read(xrcd_uobj);
1888
1889 mutex_lock(&file->mutex);
1890 list_add_tail(&obj->uevent.uobject.list, &file->ucontext->qp_list);
1891 mutex_unlock(&file->mutex);
1892
1893 obj->uevent.uobject.live = 1;
1894
1895 up_write(&obj->uevent.uobject.mutex);
1896
1897 return in_len;
1898
1899 err_remove:
1900 idr_remove_uobj(&ib_uverbs_qp_idr, &obj->uevent.uobject);
1901
1902 err_destroy:
1903 ib_destroy_qp(qp);
1904
1905 err_put:
1906 put_xrcd_read(xrcd_uobj);
1907 put_uobj_write(&obj->uevent.uobject);
1908 return ret;
1909 }
1910
1911 ssize_t ib_uverbs_query_qp(struct ib_uverbs_file *file,
1912 const char __user *buf, int in_len,
1913 int out_len)
1914 {
1915 struct ib_uverbs_query_qp cmd;
1916 struct ib_uverbs_query_qp_resp resp;
1917 struct ib_qp *qp;
1918 struct ib_qp_attr *attr;
1919 struct ib_qp_init_attr *init_attr;
1920 int ret;
1921
1922 if (copy_from_user(&cmd, buf, sizeof cmd))
1923 return -EFAULT;
1924
1925 attr = kmalloc(sizeof *attr, GFP_KERNEL);
1926 init_attr = kmalloc(sizeof *init_attr, GFP_KERNEL);
1927 if (!attr || !init_attr) {
1928 ret = -ENOMEM;
1929 goto out;
1930 }
1931
1932 qp = idr_read_qp(cmd.qp_handle, file->ucontext);
1933 if (!qp) {
1934 ret = -EINVAL;
1935 goto out;
1936 }
1937
1938 ret = ib_query_qp(qp, attr, cmd.attr_mask, init_attr);
1939
1940 put_qp_read(qp);
1941
1942 if (ret)
1943 goto out;
1944
1945 memset(&resp, 0, sizeof resp);
1946
1947 resp.qp_state = attr->qp_state;
1948 resp.cur_qp_state = attr->cur_qp_state;
1949 resp.path_mtu = attr->path_mtu;
1950 resp.path_mig_state = attr->path_mig_state;
1951 resp.qkey = attr->qkey;
1952 resp.rq_psn = attr->rq_psn;
1953 resp.sq_psn = attr->sq_psn;
1954 resp.dest_qp_num = attr->dest_qp_num;
1955 resp.qp_access_flags = attr->qp_access_flags;
1956 resp.pkey_index = attr->pkey_index;
1957 resp.alt_pkey_index = attr->alt_pkey_index;
1958 resp.sq_draining = attr->sq_draining;
1959 resp.max_rd_atomic = attr->max_rd_atomic;
1960 resp.max_dest_rd_atomic = attr->max_dest_rd_atomic;
1961 resp.min_rnr_timer = attr->min_rnr_timer;
1962 resp.port_num = attr->port_num;
1963 resp.timeout = attr->timeout;
1964 resp.retry_cnt = attr->retry_cnt;
1965 resp.rnr_retry = attr->rnr_retry;
1966 resp.alt_port_num = attr->alt_port_num;
1967 resp.alt_timeout = attr->alt_timeout;
1968
1969 memcpy(resp.dest.dgid, attr->ah_attr.grh.dgid.raw, 16);
1970 resp.dest.flow_label = attr->ah_attr.grh.flow_label;
1971 resp.dest.sgid_index = attr->ah_attr.grh.sgid_index;
1972 resp.dest.hop_limit = attr->ah_attr.grh.hop_limit;
1973 resp.dest.traffic_class = attr->ah_attr.grh.traffic_class;
1974 resp.dest.dlid = attr->ah_attr.dlid;
1975 resp.dest.sl = attr->ah_attr.sl;
1976 resp.dest.src_path_bits = attr->ah_attr.src_path_bits;
1977 resp.dest.static_rate = attr->ah_attr.static_rate;
1978 resp.dest.is_global = !!(attr->ah_attr.ah_flags & IB_AH_GRH);
1979 resp.dest.port_num = attr->ah_attr.port_num;
1980
1981 memcpy(resp.alt_dest.dgid, attr->alt_ah_attr.grh.dgid.raw, 16);
1982 resp.alt_dest.flow_label = attr->alt_ah_attr.grh.flow_label;
1983 resp.alt_dest.sgid_index = attr->alt_ah_attr.grh.sgid_index;
1984 resp.alt_dest.hop_limit = attr->alt_ah_attr.grh.hop_limit;
1985 resp.alt_dest.traffic_class = attr->alt_ah_attr.grh.traffic_class;
1986 resp.alt_dest.dlid = attr->alt_ah_attr.dlid;
1987 resp.alt_dest.sl = attr->alt_ah_attr.sl;
1988 resp.alt_dest.src_path_bits = attr->alt_ah_attr.src_path_bits;
1989 resp.alt_dest.static_rate = attr->alt_ah_attr.static_rate;
1990 resp.alt_dest.is_global = !!(attr->alt_ah_attr.ah_flags & IB_AH_GRH);
1991 resp.alt_dest.port_num = attr->alt_ah_attr.port_num;
1992
1993 resp.max_send_wr = init_attr->cap.max_send_wr;
1994 resp.max_recv_wr = init_attr->cap.max_recv_wr;
1995 resp.max_send_sge = init_attr->cap.max_send_sge;
1996 resp.max_recv_sge = init_attr->cap.max_recv_sge;
1997 resp.max_inline_data = init_attr->cap.max_inline_data;
1998 resp.sq_sig_all = init_attr->sq_sig_type == IB_SIGNAL_ALL_WR;
1999
2000 if (copy_to_user((void __user *) (unsigned long) cmd.response,
2001 &resp, sizeof resp))
2002 ret = -EFAULT;
2003
2004 out:
2005 kfree(attr);
2006 kfree(init_attr);
2007
2008 return ret ? ret : in_len;
2009 }
2010
2011 /* Remove ignored fields set in the attribute mask */
2012 static int modify_qp_mask(enum ib_qp_type qp_type, int mask)
2013 {
2014 switch (qp_type) {
2015 case IB_QPT_XRC_INI:
2016 return mask & ~(IB_QP_MAX_DEST_RD_ATOMIC | IB_QP_MIN_RNR_TIMER);
2017 case IB_QPT_XRC_TGT:
2018 return mask & ~(IB_QP_MAX_QP_RD_ATOMIC | IB_QP_RETRY_CNT |
2019 IB_QP_RNR_RETRY);
2020 default:
2021 return mask;
2022 }
2023 }
2024
2025 ssize_t ib_uverbs_modify_qp(struct ib_uverbs_file *file,
2026 const char __user *buf, int in_len,
2027 int out_len)
2028 {
2029 struct ib_uverbs_modify_qp cmd;
2030 struct ib_udata udata;
2031 struct ib_qp *qp;
2032 struct ib_qp_attr *attr;
2033 int ret;
2034
2035 if (copy_from_user(&cmd, buf, sizeof cmd))
2036 return -EFAULT;
2037
2038 INIT_UDATA(&udata, buf + sizeof cmd, NULL, in_len - sizeof cmd,
2039 out_len);
2040
2041 attr = kmalloc(sizeof *attr, GFP_KERNEL);
2042 if (!attr)
2043 return -ENOMEM;
2044
2045 qp = idr_read_qp(cmd.qp_handle, file->ucontext);
2046 if (!qp) {
2047 ret = -EINVAL;
2048 goto out;
2049 }
2050
2051 attr->qp_state = cmd.qp_state;
2052 attr->cur_qp_state = cmd.cur_qp_state;
2053 attr->path_mtu = cmd.path_mtu;
2054 attr->path_mig_state = cmd.path_mig_state;
2055 attr->qkey = cmd.qkey;
2056 attr->rq_psn = cmd.rq_psn;
2057 attr->sq_psn = cmd.sq_psn;
2058 attr->dest_qp_num = cmd.dest_qp_num;
2059 attr->qp_access_flags = cmd.qp_access_flags;
2060 attr->pkey_index = cmd.pkey_index;
2061 attr->alt_pkey_index = cmd.alt_pkey_index;
2062 attr->en_sqd_async_notify = cmd.en_sqd_async_notify;
2063 attr->max_rd_atomic = cmd.max_rd_atomic;
2064 attr->max_dest_rd_atomic = cmd.max_dest_rd_atomic;
2065 attr->min_rnr_timer = cmd.min_rnr_timer;
2066 attr->port_num = cmd.port_num;
2067 attr->timeout = cmd.timeout;
2068 attr->retry_cnt = cmd.retry_cnt;
2069 attr->rnr_retry = cmd.rnr_retry;
2070 attr->alt_port_num = cmd.alt_port_num;
2071 attr->alt_timeout = cmd.alt_timeout;
2072
2073 memcpy(attr->ah_attr.grh.dgid.raw, cmd.dest.dgid, 16);
2074 attr->ah_attr.grh.flow_label = cmd.dest.flow_label;
2075 attr->ah_attr.grh.sgid_index = cmd.dest.sgid_index;
2076 attr->ah_attr.grh.hop_limit = cmd.dest.hop_limit;
2077 attr->ah_attr.grh.traffic_class = cmd.dest.traffic_class;
2078 attr->ah_attr.dlid = cmd.dest.dlid;
2079 attr->ah_attr.sl = cmd.dest.sl;
2080 attr->ah_attr.src_path_bits = cmd.dest.src_path_bits;
2081 attr->ah_attr.static_rate = cmd.dest.static_rate;
2082 attr->ah_attr.ah_flags = cmd.dest.is_global ? IB_AH_GRH : 0;
2083 attr->ah_attr.port_num = cmd.dest.port_num;
2084
2085 memcpy(attr->alt_ah_attr.grh.dgid.raw, cmd.alt_dest.dgid, 16);
2086 attr->alt_ah_attr.grh.flow_label = cmd.alt_dest.flow_label;
2087 attr->alt_ah_attr.grh.sgid_index = cmd.alt_dest.sgid_index;
2088 attr->alt_ah_attr.grh.hop_limit = cmd.alt_dest.hop_limit;
2089 attr->alt_ah_attr.grh.traffic_class = cmd.alt_dest.traffic_class;
2090 attr->alt_ah_attr.dlid = cmd.alt_dest.dlid;
2091 attr->alt_ah_attr.sl = cmd.alt_dest.sl;
2092 attr->alt_ah_attr.src_path_bits = cmd.alt_dest.src_path_bits;
2093 attr->alt_ah_attr.static_rate = cmd.alt_dest.static_rate;
2094 attr->alt_ah_attr.ah_flags = cmd.alt_dest.is_global ? IB_AH_GRH : 0;
2095 attr->alt_ah_attr.port_num = cmd.alt_dest.port_num;
2096
2097 if (qp->real_qp == qp) {
2098 ret = ib_resolve_eth_l2_attrs(qp, attr, &cmd.attr_mask);
2099 if (ret)
2100 goto out;
2101 ret = qp->device->modify_qp(qp, attr,
2102 modify_qp_mask(qp->qp_type, cmd.attr_mask), &udata);
2103 } else {
2104 ret = ib_modify_qp(qp, attr, modify_qp_mask(qp->qp_type, cmd.attr_mask));
2105 }
2106
2107 put_qp_read(qp);
2108
2109 if (ret)
2110 goto out;
2111
2112 ret = in_len;
2113
2114 out:
2115 kfree(attr);
2116
2117 return ret;
2118 }
2119
2120 ssize_t ib_uverbs_destroy_qp(struct ib_uverbs_file *file,
2121 const char __user *buf, int in_len,
2122 int out_len)
2123 {
2124 struct ib_uverbs_destroy_qp cmd;
2125 struct ib_uverbs_destroy_qp_resp resp;
2126 struct ib_uobject *uobj;
2127 struct ib_qp *qp;
2128 struct ib_uqp_object *obj;
2129 int ret = -EINVAL;
2130
2131 if (copy_from_user(&cmd, buf, sizeof cmd))
2132 return -EFAULT;
2133
2134 memset(&resp, 0, sizeof resp);
2135
2136 uobj = idr_write_uobj(&ib_uverbs_qp_idr, cmd.qp_handle, file->ucontext);
2137 if (!uobj)
2138 return -EINVAL;
2139 qp = uobj->object;
2140 obj = container_of(uobj, struct ib_uqp_object, uevent.uobject);
2141
2142 if (!list_empty(&obj->mcast_list)) {
2143 put_uobj_write(uobj);
2144 return -EBUSY;
2145 }
2146
2147 ret = ib_destroy_qp(qp);
2148 if (!ret)
2149 uobj->live = 0;
2150
2151 put_uobj_write(uobj);
2152
2153 if (ret)
2154 return ret;
2155
2156 if (obj->uxrcd)
2157 atomic_dec(&obj->uxrcd->refcnt);
2158
2159 idr_remove_uobj(&ib_uverbs_qp_idr, uobj);
2160
2161 mutex_lock(&file->mutex);
2162 list_del(&uobj->list);
2163 mutex_unlock(&file->mutex);
2164
2165 ib_uverbs_release_uevent(file, &obj->uevent);
2166
2167 resp.events_reported = obj->uevent.events_reported;
2168
2169 put_uobj(uobj);
2170
2171 if (copy_to_user((void __user *) (unsigned long) cmd.response,
2172 &resp, sizeof resp))
2173 return -EFAULT;
2174
2175 return in_len;
2176 }
2177
2178 ssize_t ib_uverbs_post_send(struct ib_uverbs_file *file,
2179 const char __user *buf, int in_len,
2180 int out_len)
2181 {
2182 struct ib_uverbs_post_send cmd;
2183 struct ib_uverbs_post_send_resp resp;
2184 struct ib_uverbs_send_wr *user_wr;
2185 struct ib_send_wr *wr = NULL, *last, *next, *bad_wr;
2186 struct ib_qp *qp;
2187 int i, sg_ind;
2188 int is_ud;
2189 ssize_t ret = -EINVAL;
2190
2191 if (copy_from_user(&cmd, buf, sizeof cmd))
2192 return -EFAULT;
2193
2194 if (in_len < sizeof cmd + cmd.wqe_size * cmd.wr_count +
2195 cmd.sge_count * sizeof (struct ib_uverbs_sge))
2196 return -EINVAL;
2197
2198 if (cmd.wqe_size < sizeof (struct ib_uverbs_send_wr))
2199 return -EINVAL;
2200
2201 user_wr = kmalloc(cmd.wqe_size, GFP_KERNEL);
2202 if (!user_wr)
2203 return -ENOMEM;
2204
2205 qp = idr_read_qp(cmd.qp_handle, file->ucontext);
2206 if (!qp)
2207 goto out;
2208
2209 is_ud = qp->qp_type == IB_QPT_UD;
2210 sg_ind = 0;
2211 last = NULL;
2212 for (i = 0; i < cmd.wr_count; ++i) {
2213 if (copy_from_user(user_wr,
2214 buf + sizeof cmd + i * cmd.wqe_size,
2215 cmd.wqe_size)) {
2216 ret = -EFAULT;
2217 goto out_put;
2218 }
2219
2220 if (user_wr->num_sge + sg_ind > cmd.sge_count) {
2221 ret = -EINVAL;
2222 goto out_put;
2223 }
2224
2225 next = kmalloc(ALIGN(sizeof *next, sizeof (struct ib_sge)) +
2226 user_wr->num_sge * sizeof (struct ib_sge),
2227 GFP_KERNEL);
2228 if (!next) {
2229 ret = -ENOMEM;
2230 goto out_put;
2231 }
2232
2233 if (!last)
2234 wr = next;
2235 else
2236 last->next = next;
2237 last = next;
2238
2239 next->next = NULL;
2240 next->wr_id = user_wr->wr_id;
2241 next->num_sge = user_wr->num_sge;
2242 next->opcode = user_wr->opcode;
2243 next->send_flags = user_wr->send_flags;
2244
2245 if (is_ud) {
2246 next->wr.ud.ah = idr_read_ah(user_wr->wr.ud.ah,
2247 file->ucontext);
2248 if (!next->wr.ud.ah) {
2249 ret = -EINVAL;
2250 goto out_put;
2251 }
2252 next->wr.ud.remote_qpn = user_wr->wr.ud.remote_qpn;
2253 next->wr.ud.remote_qkey = user_wr->wr.ud.remote_qkey;
2254 if (next->opcode == IB_WR_SEND_WITH_IMM)
2255 next->ex.imm_data =
2256 (__be32 __force) user_wr->ex.imm_data;
2257 } else {
2258 switch (next->opcode) {
2259 case IB_WR_RDMA_WRITE_WITH_IMM:
2260 next->ex.imm_data =
2261 (__be32 __force) user_wr->ex.imm_data;
2262 case IB_WR_RDMA_WRITE:
2263 case IB_WR_RDMA_READ:
2264 next->wr.rdma.remote_addr =
2265 user_wr->wr.rdma.remote_addr;
2266 next->wr.rdma.rkey =
2267 user_wr->wr.rdma.rkey;
2268 break;
2269 case IB_WR_SEND_WITH_IMM:
2270 next->ex.imm_data =
2271 (__be32 __force) user_wr->ex.imm_data;
2272 break;
2273 case IB_WR_SEND_WITH_INV:
2274 next->ex.invalidate_rkey =
2275 user_wr->ex.invalidate_rkey;
2276 break;
2277 case IB_WR_ATOMIC_CMP_AND_SWP:
2278 case IB_WR_ATOMIC_FETCH_AND_ADD:
2279 next->wr.atomic.remote_addr =
2280 user_wr->wr.atomic.remote_addr;
2281 next->wr.atomic.compare_add =
2282 user_wr->wr.atomic.compare_add;
2283 next->wr.atomic.swap = user_wr->wr.atomic.swap;
2284 next->wr.atomic.rkey = user_wr->wr.atomic.rkey;
2285 break;
2286 default:
2287 break;
2288 }
2289 }
2290
2291 if (next->num_sge) {
2292 next->sg_list = (void *) next +
2293 ALIGN(sizeof *next, sizeof (struct ib_sge));
2294 if (copy_from_user(next->sg_list,
2295 buf + sizeof cmd +
2296 cmd.wr_count * cmd.wqe_size +
2297 sg_ind * sizeof (struct ib_sge),
2298 next->num_sge * sizeof (struct ib_sge))) {
2299 ret = -EFAULT;
2300 goto out_put;
2301 }
2302 sg_ind += next->num_sge;
2303 } else
2304 next->sg_list = NULL;
2305 }
2306
2307 resp.bad_wr = 0;
2308 ret = qp->device->post_send(qp->real_qp, wr, &bad_wr);
2309 if (ret)
2310 for (next = wr; next; next = next->next) {
2311 ++resp.bad_wr;
2312 if (next == bad_wr)
2313 break;
2314 }
2315
2316 if (copy_to_user((void __user *) (unsigned long) cmd.response,
2317 &resp, sizeof resp))
2318 ret = -EFAULT;
2319
2320 out_put:
2321 put_qp_read(qp);
2322
2323 while (wr) {
2324 if (is_ud && wr->wr.ud.ah)
2325 put_ah_read(wr->wr.ud.ah);
2326 next = wr->next;
2327 kfree(wr);
2328 wr = next;
2329 }
2330
2331 out:
2332 kfree(user_wr);
2333
2334 return ret ? ret : in_len;
2335 }
2336
2337 static struct ib_recv_wr *ib_uverbs_unmarshall_recv(const char __user *buf,
2338 int in_len,
2339 u32 wr_count,
2340 u32 sge_count,
2341 u32 wqe_size)
2342 {
2343 struct ib_uverbs_recv_wr *user_wr;
2344 struct ib_recv_wr *wr = NULL, *last, *next;
2345 int sg_ind;
2346 int i;
2347 int ret;
2348
2349 if (in_len < wqe_size * wr_count +
2350 sge_count * sizeof (struct ib_uverbs_sge))
2351 return ERR_PTR(-EINVAL);
2352
2353 if (wqe_size < sizeof (struct ib_uverbs_recv_wr))
2354 return ERR_PTR(-EINVAL);
2355
2356 user_wr = kmalloc(wqe_size, GFP_KERNEL);
2357 if (!user_wr)
2358 return ERR_PTR(-ENOMEM);
2359
2360 sg_ind = 0;
2361 last = NULL;
2362 for (i = 0; i < wr_count; ++i) {
2363 if (copy_from_user(user_wr, buf + i * wqe_size,
2364 wqe_size)) {
2365 ret = -EFAULT;
2366 goto err;
2367 }
2368
2369 if (user_wr->num_sge + sg_ind > sge_count) {
2370 ret = -EINVAL;
2371 goto err;
2372 }
2373
2374 next = kmalloc(ALIGN(sizeof *next, sizeof (struct ib_sge)) +
2375 user_wr->num_sge * sizeof (struct ib_sge),
2376 GFP_KERNEL);
2377 if (!next) {
2378 ret = -ENOMEM;
2379 goto err;
2380 }
2381
2382 if (!last)
2383 wr = next;
2384 else
2385 last->next = next;
2386 last = next;
2387
2388 next->next = NULL;
2389 next->wr_id = user_wr->wr_id;
2390 next->num_sge = user_wr->num_sge;
2391
2392 if (next->num_sge) {
2393 next->sg_list = (void *) next +
2394 ALIGN(sizeof *next, sizeof (struct ib_sge));
2395 if (copy_from_user(next->sg_list,
2396 buf + wr_count * wqe_size +
2397 sg_ind * sizeof (struct ib_sge),
2398 next->num_sge * sizeof (struct ib_sge))) {
2399 ret = -EFAULT;
2400 goto err;
2401 }
2402 sg_ind += next->num_sge;
2403 } else
2404 next->sg_list = NULL;
2405 }
2406
2407 kfree(user_wr);
2408 return wr;
2409
2410 err:
2411 kfree(user_wr);
2412
2413 while (wr) {
2414 next = wr->next;
2415 kfree(wr);
2416 wr = next;
2417 }
2418
2419 return ERR_PTR(ret);
2420 }
2421
2422 ssize_t ib_uverbs_post_recv(struct ib_uverbs_file *file,
2423 const char __user *buf, int in_len,
2424 int out_len)
2425 {
2426 struct ib_uverbs_post_recv cmd;
2427 struct ib_uverbs_post_recv_resp resp;
2428 struct ib_recv_wr *wr, *next, *bad_wr;
2429 struct ib_qp *qp;
2430 ssize_t ret = -EINVAL;
2431
2432 if (copy_from_user(&cmd, buf, sizeof cmd))
2433 return -EFAULT;
2434
2435 wr = ib_uverbs_unmarshall_recv(buf + sizeof cmd,
2436 in_len - sizeof cmd, cmd.wr_count,
2437 cmd.sge_count, cmd.wqe_size);
2438 if (IS_ERR(wr))
2439 return PTR_ERR(wr);
2440
2441 qp = idr_read_qp(cmd.qp_handle, file->ucontext);
2442 if (!qp)
2443 goto out;
2444
2445 resp.bad_wr = 0;
2446 ret = qp->device->post_recv(qp->real_qp, wr, &bad_wr);
2447
2448 put_qp_read(qp);
2449
2450 if (ret)
2451 for (next = wr; next; next = next->next) {
2452 ++resp.bad_wr;
2453 if (next == bad_wr)
2454 break;
2455 }
2456
2457 if (copy_to_user((void __user *) (unsigned long) cmd.response,
2458 &resp, sizeof resp))
2459 ret = -EFAULT;
2460
2461 out:
2462 while (wr) {
2463 next = wr->next;
2464 kfree(wr);
2465 wr = next;
2466 }
2467
2468 return ret ? ret : in_len;
2469 }
2470
2471 ssize_t ib_uverbs_post_srq_recv(struct ib_uverbs_file *file,
2472 const char __user *buf, int in_len,
2473 int out_len)
2474 {
2475 struct ib_uverbs_post_srq_recv cmd;
2476 struct ib_uverbs_post_srq_recv_resp resp;
2477 struct ib_recv_wr *wr, *next, *bad_wr;
2478 struct ib_srq *srq;
2479 ssize_t ret = -EINVAL;
2480
2481 if (copy_from_user(&cmd, buf, sizeof cmd))
2482 return -EFAULT;
2483
2484 wr = ib_uverbs_unmarshall_recv(buf + sizeof cmd,
2485 in_len - sizeof cmd, cmd.wr_count,
2486 cmd.sge_count, cmd.wqe_size);
2487 if (IS_ERR(wr))
2488 return PTR_ERR(wr);
2489
2490 srq = idr_read_srq(cmd.srq_handle, file->ucontext);
2491 if (!srq)
2492 goto out;
2493
2494 resp.bad_wr = 0;
2495 ret = srq->device->post_srq_recv(srq, wr, &bad_wr);
2496
2497 put_srq_read(srq);
2498
2499 if (ret)
2500 for (next = wr; next; next = next->next) {
2501 ++resp.bad_wr;
2502 if (next == bad_wr)
2503 break;
2504 }
2505
2506 if (copy_to_user((void __user *) (unsigned long) cmd.response,
2507 &resp, sizeof resp))
2508 ret = -EFAULT;
2509
2510 out:
2511 while (wr) {
2512 next = wr->next;
2513 kfree(wr);
2514 wr = next;
2515 }
2516
2517 return ret ? ret : in_len;
2518 }
2519
2520 ssize_t ib_uverbs_create_ah(struct ib_uverbs_file *file,
2521 const char __user *buf, int in_len,
2522 int out_len)
2523 {
2524 struct ib_uverbs_create_ah cmd;
2525 struct ib_uverbs_create_ah_resp resp;
2526 struct ib_uobject *uobj;
2527 struct ib_pd *pd;
2528 struct ib_ah *ah;
2529 struct ib_ah_attr attr;
2530 int ret;
2531
2532 if (out_len < sizeof resp)
2533 return -ENOSPC;
2534
2535 if (copy_from_user(&cmd, buf, sizeof cmd))
2536 return -EFAULT;
2537
2538 uobj = kmalloc(sizeof *uobj, GFP_KERNEL);
2539 if (!uobj)
2540 return -ENOMEM;
2541
2542 init_uobj(uobj, cmd.user_handle, file->ucontext, &ah_lock_class);
2543 down_write(&uobj->mutex);
2544
2545 pd = idr_read_pd(cmd.pd_handle, file->ucontext);
2546 if (!pd) {
2547 ret = -EINVAL;
2548 goto err;
2549 }
2550
2551 attr.dlid = cmd.attr.dlid;
2552 attr.sl = cmd.attr.sl;
2553 attr.src_path_bits = cmd.attr.src_path_bits;
2554 attr.static_rate = cmd.attr.static_rate;
2555 attr.ah_flags = cmd.attr.is_global ? IB_AH_GRH : 0;
2556 attr.port_num = cmd.attr.port_num;
2557 attr.grh.flow_label = cmd.attr.grh.flow_label;
2558 attr.grh.sgid_index = cmd.attr.grh.sgid_index;
2559 attr.grh.hop_limit = cmd.attr.grh.hop_limit;
2560 attr.grh.traffic_class = cmd.attr.grh.traffic_class;
2561 attr.vlan_id = 0;
2562 memset(&attr.dmac, 0, sizeof(attr.dmac));
2563 memcpy(attr.grh.dgid.raw, cmd.attr.grh.dgid, 16);
2564
2565 ah = ib_create_ah(pd, &attr);
2566 if (IS_ERR(ah)) {
2567 ret = PTR_ERR(ah);
2568 goto err_put;
2569 }
2570
2571 ah->uobject = uobj;
2572 uobj->object = ah;
2573
2574 ret = idr_add_uobj(&ib_uverbs_ah_idr, uobj);
2575 if (ret)
2576 goto err_destroy;
2577
2578 resp.ah_handle = uobj->id;
2579
2580 if (copy_to_user((void __user *) (unsigned long) cmd.response,
2581 &resp, sizeof resp)) {
2582 ret = -EFAULT;
2583 goto err_copy;
2584 }
2585
2586 put_pd_read(pd);
2587
2588 mutex_lock(&file->mutex);
2589 list_add_tail(&uobj->list, &file->ucontext->ah_list);
2590 mutex_unlock(&file->mutex);
2591
2592 uobj->live = 1;
2593
2594 up_write(&uobj->mutex);
2595
2596 return in_len;
2597
2598 err_copy:
2599 idr_remove_uobj(&ib_uverbs_ah_idr, uobj);
2600
2601 err_destroy:
2602 ib_destroy_ah(ah);
2603
2604 err_put:
2605 put_pd_read(pd);
2606
2607 err:
2608 put_uobj_write(uobj);
2609 return ret;
2610 }
2611
2612 ssize_t ib_uverbs_destroy_ah(struct ib_uverbs_file *file,
2613 const char __user *buf, int in_len, int out_len)
2614 {
2615 struct ib_uverbs_destroy_ah cmd;
2616 struct ib_ah *ah;
2617 struct ib_uobject *uobj;
2618 int ret;
2619
2620 if (copy_from_user(&cmd, buf, sizeof cmd))
2621 return -EFAULT;
2622
2623 uobj = idr_write_uobj(&ib_uverbs_ah_idr, cmd.ah_handle, file->ucontext);
2624 if (!uobj)
2625 return -EINVAL;
2626 ah = uobj->object;
2627
2628 ret = ib_destroy_ah(ah);
2629 if (!ret)
2630 uobj->live = 0;
2631
2632 put_uobj_write(uobj);
2633
2634 if (ret)
2635 return ret;
2636
2637 idr_remove_uobj(&ib_uverbs_ah_idr, uobj);
2638
2639 mutex_lock(&file->mutex);
2640 list_del(&uobj->list);
2641 mutex_unlock(&file->mutex);
2642
2643 put_uobj(uobj);
2644
2645 return in_len;
2646 }
2647
2648 ssize_t ib_uverbs_attach_mcast(struct ib_uverbs_file *file,
2649 const char __user *buf, int in_len,
2650 int out_len)
2651 {
2652 struct ib_uverbs_attach_mcast cmd;
2653 struct ib_qp *qp;
2654 struct ib_uqp_object *obj;
2655 struct ib_uverbs_mcast_entry *mcast;
2656 int ret;
2657
2658 if (copy_from_user(&cmd, buf, sizeof cmd))
2659 return -EFAULT;
2660
2661 qp = idr_write_qp(cmd.qp_handle, file->ucontext);
2662 if (!qp)
2663 return -EINVAL;
2664
2665 obj = container_of(qp->uobject, struct ib_uqp_object, uevent.uobject);
2666
2667 list_for_each_entry(mcast, &obj->mcast_list, list)
2668 if (cmd.mlid == mcast->lid &&
2669 !memcmp(cmd.gid, mcast->gid.raw, sizeof mcast->gid.raw)) {
2670 ret = 0;
2671 goto out_put;
2672 }
2673
2674 mcast = kmalloc(sizeof *mcast, GFP_KERNEL);
2675 if (!mcast) {
2676 ret = -ENOMEM;
2677 goto out_put;
2678 }
2679
2680 mcast->lid = cmd.mlid;
2681 memcpy(mcast->gid.raw, cmd.gid, sizeof mcast->gid.raw);
2682
2683 ret = ib_attach_mcast(qp, &mcast->gid, cmd.mlid);
2684 if (!ret)
2685 list_add_tail(&mcast->list, &obj->mcast_list);
2686 else
2687 kfree(mcast);
2688
2689 out_put:
2690 put_qp_write(qp);
2691
2692 return ret ? ret : in_len;
2693 }
2694
2695 ssize_t ib_uverbs_detach_mcast(struct ib_uverbs_file *file,
2696 const char __user *buf, int in_len,
2697 int out_len)
2698 {
2699 struct ib_uverbs_detach_mcast cmd;
2700 struct ib_uqp_object *obj;
2701 struct ib_qp *qp;
2702 struct ib_uverbs_mcast_entry *mcast;
2703 int ret = -EINVAL;
2704
2705 if (copy_from_user(&cmd, buf, sizeof cmd))
2706 return -EFAULT;
2707
2708 qp = idr_write_qp(cmd.qp_handle, file->ucontext);
2709 if (!qp)
2710 return -EINVAL;
2711
2712 ret = ib_detach_mcast(qp, (union ib_gid *) cmd.gid, cmd.mlid);
2713 if (ret)
2714 goto out_put;
2715
2716 obj = container_of(qp->uobject, struct ib_uqp_object, uevent.uobject);
2717
2718 list_for_each_entry(mcast, &obj->mcast_list, list)
2719 if (cmd.mlid == mcast->lid &&
2720 !memcmp(cmd.gid, mcast->gid.raw, sizeof mcast->gid.raw)) {
2721 list_del(&mcast->list);
2722 kfree(mcast);
2723 break;
2724 }
2725
2726 out_put:
2727 put_qp_write(qp);
2728
2729 return ret ? ret : in_len;
2730 }
2731
2732 static int kern_spec_to_ib_spec(struct ib_uverbs_flow_spec *kern_spec,
2733 union ib_flow_spec *ib_spec)
2734 {
2735 if (kern_spec->reserved)
2736 return -EINVAL;
2737
2738 ib_spec->type = kern_spec->type;
2739
2740 switch (ib_spec->type) {
2741 case IB_FLOW_SPEC_ETH:
2742 ib_spec->eth.size = sizeof(struct ib_flow_spec_eth);
2743 if (ib_spec->eth.size != kern_spec->eth.size)
2744 return -EINVAL;
2745 memcpy(&ib_spec->eth.val, &kern_spec->eth.val,
2746 sizeof(struct ib_flow_eth_filter));
2747 memcpy(&ib_spec->eth.mask, &kern_spec->eth.mask,
2748 sizeof(struct ib_flow_eth_filter));
2749 break;
2750 case IB_FLOW_SPEC_IPV4:
2751 ib_spec->ipv4.size = sizeof(struct ib_flow_spec_ipv4);
2752 if (ib_spec->ipv4.size != kern_spec->ipv4.size)
2753 return -EINVAL;
2754 memcpy(&ib_spec->ipv4.val, &kern_spec->ipv4.val,
2755 sizeof(struct ib_flow_ipv4_filter));
2756 memcpy(&ib_spec->ipv4.mask, &kern_spec->ipv4.mask,
2757 sizeof(struct ib_flow_ipv4_filter));
2758 break;
2759 case IB_FLOW_SPEC_TCP:
2760 case IB_FLOW_SPEC_UDP:
2761 ib_spec->tcp_udp.size = sizeof(struct ib_flow_spec_tcp_udp);
2762 if (ib_spec->tcp_udp.size != kern_spec->tcp_udp.size)
2763 return -EINVAL;
2764 memcpy(&ib_spec->tcp_udp.val, &kern_spec->tcp_udp.val,
2765 sizeof(struct ib_flow_tcp_udp_filter));
2766 memcpy(&ib_spec->tcp_udp.mask, &kern_spec->tcp_udp.mask,
2767 sizeof(struct ib_flow_tcp_udp_filter));
2768 break;
2769 default:
2770 return -EINVAL;
2771 }
2772 return 0;
2773 }
2774
2775 int ib_uverbs_ex_create_flow(struct ib_uverbs_file *file,
2776 struct ib_udata *ucore,
2777 struct ib_udata *uhw)
2778 {
2779 struct ib_uverbs_create_flow cmd;
2780 struct ib_uverbs_create_flow_resp resp;
2781 struct ib_uobject *uobj;
2782 struct ib_flow *flow_id;
2783 struct ib_uverbs_flow_attr *kern_flow_attr;
2784 struct ib_flow_attr *flow_attr;
2785 struct ib_qp *qp;
2786 int err = 0;
2787 void *kern_spec;
2788 void *ib_spec;
2789 int i;
2790
2791 if (ucore->inlen < sizeof(cmd))
2792 return -EINVAL;
2793
2794 if (ucore->outlen < sizeof(resp))
2795 return -ENOSPC;
2796
2797 err = ib_copy_from_udata(&cmd, ucore, sizeof(cmd));
2798 if (err)
2799 return err;
2800
2801 ucore->inbuf += sizeof(cmd);
2802 ucore->inlen -= sizeof(cmd);
2803
2804 if (cmd.comp_mask)
2805 return -EINVAL;
2806
2807 if ((cmd.flow_attr.type == IB_FLOW_ATTR_SNIFFER &&
2808 !capable(CAP_NET_ADMIN)) || !capable(CAP_NET_RAW))
2809 return -EPERM;
2810
2811 if (cmd.flow_attr.num_of_specs > IB_FLOW_SPEC_SUPPORT_LAYERS)
2812 return -EINVAL;
2813
2814 if (cmd.flow_attr.size > ucore->inlen ||
2815 cmd.flow_attr.size >
2816 (cmd.flow_attr.num_of_specs * sizeof(struct ib_uverbs_flow_spec)))
2817 return -EINVAL;
2818
2819 if (cmd.flow_attr.reserved[0] ||
2820 cmd.flow_attr.reserved[1])
2821 return -EINVAL;
2822
2823 if (cmd.flow_attr.num_of_specs) {
2824 kern_flow_attr = kmalloc(sizeof(*kern_flow_attr) + cmd.flow_attr.size,
2825 GFP_KERNEL);
2826 if (!kern_flow_attr)
2827 return -ENOMEM;
2828
2829 memcpy(kern_flow_attr, &cmd.flow_attr, sizeof(*kern_flow_attr));
2830 err = ib_copy_from_udata(kern_flow_attr + 1, ucore,
2831 cmd.flow_attr.size);
2832 if (err)
2833 goto err_free_attr;
2834 } else {
2835 kern_flow_attr = &cmd.flow_attr;
2836 }
2837
2838 uobj = kmalloc(sizeof(*uobj), GFP_KERNEL);
2839 if (!uobj) {
2840 err = -ENOMEM;
2841 goto err_free_attr;
2842 }
2843 init_uobj(uobj, 0, file->ucontext, &rule_lock_class);
2844 down_write(&uobj->mutex);
2845
2846 qp = idr_read_qp(cmd.qp_handle, file->ucontext);
2847 if (!qp) {
2848 err = -EINVAL;
2849 goto err_uobj;
2850 }
2851
2852 flow_attr = kmalloc(sizeof(*flow_attr) + cmd.flow_attr.size, GFP_KERNEL);
2853 if (!flow_attr) {
2854 err = -ENOMEM;
2855 goto err_put;
2856 }
2857
2858 flow_attr->type = kern_flow_attr->type;
2859 flow_attr->priority = kern_flow_attr->priority;
2860 flow_attr->num_of_specs = kern_flow_attr->num_of_specs;
2861 flow_attr->port = kern_flow_attr->port;
2862 flow_attr->flags = kern_flow_attr->flags;
2863 flow_attr->size = sizeof(*flow_attr);
2864
2865 kern_spec = kern_flow_attr + 1;
2866 ib_spec = flow_attr + 1;
2867 for (i = 0; i < flow_attr->num_of_specs &&
2868 cmd.flow_attr.size > offsetof(struct ib_uverbs_flow_spec, reserved) &&
2869 cmd.flow_attr.size >=
2870 ((struct ib_uverbs_flow_spec *)kern_spec)->size; i++) {
2871 err = kern_spec_to_ib_spec(kern_spec, ib_spec);
2872 if (err)
2873 goto err_free;
2874 flow_attr->size +=
2875 ((union ib_flow_spec *) ib_spec)->size;
2876 cmd.flow_attr.size -= ((struct ib_uverbs_flow_spec *)kern_spec)->size;
2877 kern_spec += ((struct ib_uverbs_flow_spec *) kern_spec)->size;
2878 ib_spec += ((union ib_flow_spec *) ib_spec)->size;
2879 }
2880 if (cmd.flow_attr.size || (i != flow_attr->num_of_specs)) {
2881 pr_warn("create flow failed, flow %d: %d bytes left from uverb cmd\n",
2882 i, cmd.flow_attr.size);
2883 err = -EINVAL;
2884 goto err_free;
2885 }
2886 flow_id = ib_create_flow(qp, flow_attr, IB_FLOW_DOMAIN_USER);
2887 if (IS_ERR(flow_id)) {
2888 err = PTR_ERR(flow_id);
2889 goto err_free;
2890 }
2891 flow_id->qp = qp;
2892 flow_id->uobject = uobj;
2893 uobj->object = flow_id;
2894
2895 err = idr_add_uobj(&ib_uverbs_rule_idr, uobj);
2896 if (err)
2897 goto destroy_flow;
2898
2899 memset(&resp, 0, sizeof(resp));
2900 resp.flow_handle = uobj->id;
2901
2902 err = ib_copy_to_udata(ucore,
2903 &resp, sizeof(resp));
2904 if (err)
2905 goto err_copy;
2906
2907 put_qp_read(qp);
2908 mutex_lock(&file->mutex);
2909 list_add_tail(&uobj->list, &file->ucontext->rule_list);
2910 mutex_unlock(&file->mutex);
2911
2912 uobj->live = 1;
2913
2914 up_write(&uobj->mutex);
2915 kfree(flow_attr);
2916 if (cmd.flow_attr.num_of_specs)
2917 kfree(kern_flow_attr);
2918 return 0;
2919 err_copy:
2920 idr_remove_uobj(&ib_uverbs_rule_idr, uobj);
2921 destroy_flow:
2922 ib_destroy_flow(flow_id);
2923 err_free:
2924 kfree(flow_attr);
2925 err_put:
2926 put_qp_read(qp);
2927 err_uobj:
2928 put_uobj_write(uobj);
2929 err_free_attr:
2930 if (cmd.flow_attr.num_of_specs)
2931 kfree(kern_flow_attr);
2932 return err;
2933 }
2934
2935 int ib_uverbs_ex_destroy_flow(struct ib_uverbs_file *file,
2936 struct ib_udata *ucore,
2937 struct ib_udata *uhw)
2938 {
2939 struct ib_uverbs_destroy_flow cmd;
2940 struct ib_flow *flow_id;
2941 struct ib_uobject *uobj;
2942 int ret;
2943
2944 if (ucore->inlen < sizeof(cmd))
2945 return -EINVAL;
2946
2947 ret = ib_copy_from_udata(&cmd, ucore, sizeof(cmd));
2948 if (ret)
2949 return ret;
2950
2951 if (cmd.comp_mask)
2952 return -EINVAL;
2953
2954 uobj = idr_write_uobj(&ib_uverbs_rule_idr, cmd.flow_handle,
2955 file->ucontext);
2956 if (!uobj)
2957 return -EINVAL;
2958 flow_id = uobj->object;
2959
2960 ret = ib_destroy_flow(flow_id);
2961 if (!ret)
2962 uobj->live = 0;
2963
2964 put_uobj_write(uobj);
2965
2966 idr_remove_uobj(&ib_uverbs_rule_idr, uobj);
2967
2968 mutex_lock(&file->mutex);
2969 list_del(&uobj->list);
2970 mutex_unlock(&file->mutex);
2971
2972 put_uobj(uobj);
2973
2974 return ret;
2975 }
2976
2977 static int __uverbs_create_xsrq(struct ib_uverbs_file *file,
2978 struct ib_uverbs_create_xsrq *cmd,
2979 struct ib_udata *udata)
2980 {
2981 struct ib_uverbs_create_srq_resp resp;
2982 struct ib_usrq_object *obj;
2983 struct ib_pd *pd;
2984 struct ib_srq *srq;
2985 struct ib_uobject *uninitialized_var(xrcd_uobj);
2986 struct ib_srq_init_attr attr;
2987 int ret;
2988
2989 obj = kmalloc(sizeof *obj, GFP_KERNEL);
2990 if (!obj)
2991 return -ENOMEM;
2992
2993 init_uobj(&obj->uevent.uobject, cmd->user_handle, file->ucontext, &srq_lock_class);
2994 down_write(&obj->uevent.uobject.mutex);
2995
2996 if (cmd->srq_type == IB_SRQT_XRC) {
2997 attr.ext.xrc.xrcd = idr_read_xrcd(cmd->xrcd_handle, file->ucontext, &xrcd_uobj);
2998 if (!attr.ext.xrc.xrcd) {
2999 ret = -EINVAL;
3000 goto err;
3001 }
3002
3003 obj->uxrcd = container_of(xrcd_uobj, struct ib_uxrcd_object, uobject);
3004 atomic_inc(&obj->uxrcd->refcnt);
3005
3006 attr.ext.xrc.cq = idr_read_cq(cmd->cq_handle, file->ucontext, 0);
3007 if (!attr.ext.xrc.cq) {
3008 ret = -EINVAL;
3009 goto err_put_xrcd;
3010 }
3011 }
3012
3013 pd = idr_read_pd(cmd->pd_handle, file->ucontext);
3014 if (!pd) {
3015 ret = -EINVAL;
3016 goto err_put_cq;
3017 }
3018
3019 attr.event_handler = ib_uverbs_srq_event_handler;
3020 attr.srq_context = file;
3021 attr.srq_type = cmd->srq_type;
3022 attr.attr.max_wr = cmd->max_wr;
3023 attr.attr.max_sge = cmd->max_sge;
3024 attr.attr.srq_limit = cmd->srq_limit;
3025
3026 obj->uevent.events_reported = 0;
3027 INIT_LIST_HEAD(&obj->uevent.event_list);
3028
3029 srq = pd->device->create_srq(pd, &attr, udata);
3030 if (IS_ERR(srq)) {
3031 ret = PTR_ERR(srq);
3032 goto err_put;
3033 }
3034
3035 srq->device = pd->device;
3036 srq->pd = pd;
3037 srq->srq_type = cmd->srq_type;
3038 srq->uobject = &obj->uevent.uobject;
3039 srq->event_handler = attr.event_handler;
3040 srq->srq_context = attr.srq_context;
3041
3042 if (cmd->srq_type == IB_SRQT_XRC) {
3043 srq->ext.xrc.cq = attr.ext.xrc.cq;
3044 srq->ext.xrc.xrcd = attr.ext.xrc.xrcd;
3045 atomic_inc(&attr.ext.xrc.cq->usecnt);
3046 atomic_inc(&attr.ext.xrc.xrcd->usecnt);
3047 }
3048
3049 atomic_inc(&pd->usecnt);
3050 atomic_set(&srq->usecnt, 0);
3051
3052 obj->uevent.uobject.object = srq;
3053 ret = idr_add_uobj(&ib_uverbs_srq_idr, &obj->uevent.uobject);
3054 if (ret)
3055 goto err_destroy;
3056
3057 memset(&resp, 0, sizeof resp);
3058 resp.srq_handle = obj->uevent.uobject.id;
3059 resp.max_wr = attr.attr.max_wr;
3060 resp.max_sge = attr.attr.max_sge;
3061 if (cmd->srq_type == IB_SRQT_XRC)
3062 resp.srqn = srq->ext.xrc.srq_num;
3063
3064 if (copy_to_user((void __user *) (unsigned long) cmd->response,
3065 &resp, sizeof resp)) {
3066 ret = -EFAULT;
3067 goto err_copy;
3068 }
3069
3070 if (cmd->srq_type == IB_SRQT_XRC) {
3071 put_uobj_read(xrcd_uobj);
3072 put_cq_read(attr.ext.xrc.cq);
3073 }
3074 put_pd_read(pd);
3075
3076 mutex_lock(&file->mutex);
3077 list_add_tail(&obj->uevent.uobject.list, &file->ucontext->srq_list);
3078 mutex_unlock(&file->mutex);
3079
3080 obj->uevent.uobject.live = 1;
3081
3082 up_write(&obj->uevent.uobject.mutex);
3083
3084 return 0;
3085
3086 err_copy:
3087 idr_remove_uobj(&ib_uverbs_srq_idr, &obj->uevent.uobject);
3088
3089 err_destroy:
3090 ib_destroy_srq(srq);
3091
3092 err_put:
3093 put_pd_read(pd);
3094
3095 err_put_cq:
3096 if (cmd->srq_type == IB_SRQT_XRC)
3097 put_cq_read(attr.ext.xrc.cq);
3098
3099 err_put_xrcd:
3100 if (cmd->srq_type == IB_SRQT_XRC) {
3101 atomic_dec(&obj->uxrcd->refcnt);
3102 put_uobj_read(xrcd_uobj);
3103 }
3104
3105 err:
3106 put_uobj_write(&obj->uevent.uobject);
3107 return ret;
3108 }
3109
3110 ssize_t ib_uverbs_create_srq(struct ib_uverbs_file *file,
3111 const char __user *buf, int in_len,
3112 int out_len)
3113 {
3114 struct ib_uverbs_create_srq cmd;
3115 struct ib_uverbs_create_xsrq xcmd;
3116 struct ib_uverbs_create_srq_resp resp;
3117 struct ib_udata udata;
3118 int ret;
3119
3120 if (out_len < sizeof resp)
3121 return -ENOSPC;
3122
3123 if (copy_from_user(&cmd, buf, sizeof cmd))
3124 return -EFAULT;
3125
3126 xcmd.response = cmd.response;
3127 xcmd.user_handle = cmd.user_handle;
3128 xcmd.srq_type = IB_SRQT_BASIC;
3129 xcmd.pd_handle = cmd.pd_handle;
3130 xcmd.max_wr = cmd.max_wr;
3131 xcmd.max_sge = cmd.max_sge;
3132 xcmd.srq_limit = cmd.srq_limit;
3133
3134 INIT_UDATA(&udata, buf + sizeof cmd,
3135 (unsigned long) cmd.response + sizeof resp,
3136 in_len - sizeof cmd, out_len - sizeof resp);
3137
3138 ret = __uverbs_create_xsrq(file, &xcmd, &udata);
3139 if (ret)
3140 return ret;
3141
3142 return in_len;
3143 }
3144
3145 ssize_t ib_uverbs_create_xsrq(struct ib_uverbs_file *file,
3146 const char __user *buf, int in_len, int out_len)
3147 {
3148 struct ib_uverbs_create_xsrq cmd;
3149 struct ib_uverbs_create_srq_resp resp;
3150 struct ib_udata udata;
3151 int ret;
3152
3153 if (out_len < sizeof resp)
3154 return -ENOSPC;
3155
3156 if (copy_from_user(&cmd, buf, sizeof cmd))
3157 return -EFAULT;
3158
3159 INIT_UDATA(&udata, buf + sizeof cmd,
3160 (unsigned long) cmd.response + sizeof resp,
3161 in_len - sizeof cmd, out_len - sizeof resp);
3162
3163 ret = __uverbs_create_xsrq(file, &cmd, &udata);
3164 if (ret)
3165 return ret;
3166
3167 return in_len;
3168 }
3169
3170 ssize_t ib_uverbs_modify_srq(struct ib_uverbs_file *file,
3171 const char __user *buf, int in_len,
3172 int out_len)
3173 {
3174 struct ib_uverbs_modify_srq cmd;
3175 struct ib_udata udata;
3176 struct ib_srq *srq;
3177 struct ib_srq_attr attr;
3178 int ret;
3179
3180 if (copy_from_user(&cmd, buf, sizeof cmd))
3181 return -EFAULT;
3182
3183 INIT_UDATA(&udata, buf + sizeof cmd, NULL, in_len - sizeof cmd,
3184 out_len);
3185
3186 srq = idr_read_srq(cmd.srq_handle, file->ucontext);
3187 if (!srq)
3188 return -EINVAL;
3189
3190 attr.max_wr = cmd.max_wr;
3191 attr.srq_limit = cmd.srq_limit;
3192
3193 ret = srq->device->modify_srq(srq, &attr, cmd.attr_mask, &udata);
3194
3195 put_srq_read(srq);
3196
3197 return ret ? ret : in_len;
3198 }
3199
3200 ssize_t ib_uverbs_query_srq(struct ib_uverbs_file *file,
3201 const char __user *buf,
3202 int in_len, int out_len)
3203 {
3204 struct ib_uverbs_query_srq cmd;
3205 struct ib_uverbs_query_srq_resp resp;
3206 struct ib_srq_attr attr;
3207 struct ib_srq *srq;
3208 int ret;
3209
3210 if (out_len < sizeof resp)
3211 return -ENOSPC;
3212
3213 if (copy_from_user(&cmd, buf, sizeof cmd))
3214 return -EFAULT;
3215
3216 srq = idr_read_srq(cmd.srq_handle, file->ucontext);
3217 if (!srq)
3218 return -EINVAL;
3219
3220 ret = ib_query_srq(srq, &attr);
3221
3222 put_srq_read(srq);
3223
3224 if (ret)
3225 return ret;
3226
3227 memset(&resp, 0, sizeof resp);
3228
3229 resp.max_wr = attr.max_wr;
3230 resp.max_sge = attr.max_sge;
3231 resp.srq_limit = attr.srq_limit;
3232
3233 if (copy_to_user((void __user *) (unsigned long) cmd.response,
3234 &resp, sizeof resp))
3235 return -EFAULT;
3236
3237 return in_len;
3238 }
3239
3240 ssize_t ib_uverbs_destroy_srq(struct ib_uverbs_file *file,
3241 const char __user *buf, int in_len,
3242 int out_len)
3243 {
3244 struct ib_uverbs_destroy_srq cmd;
3245 struct ib_uverbs_destroy_srq_resp resp;
3246 struct ib_uobject *uobj;
3247 struct ib_srq *srq;
3248 struct ib_uevent_object *obj;
3249 int ret = -EINVAL;
3250 struct ib_usrq_object *us;
3251 enum ib_srq_type srq_type;
3252
3253 if (copy_from_user(&cmd, buf, sizeof cmd))
3254 return -EFAULT;
3255
3256 uobj = idr_write_uobj(&ib_uverbs_srq_idr, cmd.srq_handle, file->ucontext);
3257 if (!uobj)
3258 return -EINVAL;
3259 srq = uobj->object;
3260 obj = container_of(uobj, struct ib_uevent_object, uobject);
3261 srq_type = srq->srq_type;
3262
3263 ret = ib_destroy_srq(srq);
3264 if (!ret)
3265 uobj->live = 0;
3266
3267 put_uobj_write(uobj);
3268
3269 if (ret)
3270 return ret;
3271
3272 if (srq_type == IB_SRQT_XRC) {
3273 us = container_of(obj, struct ib_usrq_object, uevent);
3274 atomic_dec(&us->uxrcd->refcnt);
3275 }
3276
3277 idr_remove_uobj(&ib_uverbs_srq_idr, uobj);
3278
3279 mutex_lock(&file->mutex);
3280 list_del(&uobj->list);
3281 mutex_unlock(&file->mutex);
3282
3283 ib_uverbs_release_uevent(file, obj);
3284
3285 memset(&resp, 0, sizeof resp);
3286 resp.events_reported = obj->events_reported;
3287
3288 put_uobj(uobj);
3289
3290 if (copy_to_user((void __user *) (unsigned long) cmd.response,
3291 &resp, sizeof resp))
3292 ret = -EFAULT;
3293
3294 return ret ? ret : in_len;
3295 }
3296
3297 int ib_uverbs_ex_query_device(struct ib_uverbs_file *file,
3298 struct ib_udata *ucore,
3299 struct ib_udata *uhw)
3300 {
3301 struct ib_uverbs_ex_query_device_resp resp;
3302 struct ib_uverbs_ex_query_device cmd;
3303 struct ib_device_attr attr;
3304 struct ib_device *device;
3305 int err;
3306
3307 device = file->device->ib_dev;
3308 if (ucore->inlen < sizeof(cmd))
3309 return -EINVAL;
3310
3311 err = ib_copy_from_udata(&cmd, ucore, sizeof(cmd));
3312 if (err)
3313 return err;
3314
3315 if (cmd.reserved)
3316 return -EINVAL;
3317
3318 err = device->query_device(device, &attr);
3319 if (err)
3320 return err;
3321
3322 memset(&resp, 0, sizeof(resp));
3323 copy_query_dev_fields(file, &resp.base, &attr);
3324 resp.comp_mask = 0;
3325
3326 #ifdef CONFIG_INFINIBAND_ON_DEMAND_PAGING
3327 if (cmd.comp_mask & IB_USER_VERBS_EX_QUERY_DEVICE_ODP) {
3328 resp.odp_caps.general_caps = attr.odp_caps.general_caps;
3329 resp.odp_caps.per_transport_caps.rc_odp_caps =
3330 attr.odp_caps.per_transport_caps.rc_odp_caps;
3331 resp.odp_caps.per_transport_caps.uc_odp_caps =
3332 attr.odp_caps.per_transport_caps.uc_odp_caps;
3333 resp.odp_caps.per_transport_caps.ud_odp_caps =
3334 attr.odp_caps.per_transport_caps.ud_odp_caps;
3335 resp.comp_mask |= IB_USER_VERBS_EX_QUERY_DEVICE_ODP;
3336 }
3337 #endif
3338
3339 err = ib_copy_to_udata(ucore, &resp, sizeof(resp));
3340 if (err)
3341 return err;
3342
3343 return 0;
3344 }
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