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gpio: rcar: Fix runtime PM imbalance on error
[linux/fpc-iii.git] / drivers / infiniband / core / uverbs_cmd.c
blob060b4ebbd2ba4d7b393f33c887d5ac80d8471502
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 <linux/uaccess.h>
42
43 #include <rdma/uverbs_types.h>
44 #include <rdma/uverbs_std_types.h>
45 #include "rdma_core.h"
46
47 #include "uverbs.h"
48 #include "core_priv.h"
49
50 /*
51 * Copy a response to userspace. If the provided 'resp' is larger than the
52 * user buffer it is silently truncated. If the user provided a larger buffer
53 * then the trailing portion is zero filled.
54 *
55 * These semantics are intended to support future extension of the output
56 * structures.
57 */
58 static int uverbs_response(struct uverbs_attr_bundle *attrs, const void *resp,
59 size_t resp_len)
60 {
61 int ret;
62
63 if (uverbs_attr_is_valid(attrs, UVERBS_ATTR_CORE_OUT))
64 return uverbs_copy_to_struct_or_zero(
65 attrs, UVERBS_ATTR_CORE_OUT, resp, resp_len);
66
67 if (copy_to_user(attrs->ucore.outbuf, resp,
68 min(attrs->ucore.outlen, resp_len)))
69 return -EFAULT;
70
71 if (resp_len < attrs->ucore.outlen) {
72 /*
73 * Zero fill any extra memory that user
74 * space might have provided.
75 */
76 ret = clear_user(attrs->ucore.outbuf + resp_len,
77 attrs->ucore.outlen - resp_len);
78 if (ret)
79 return -EFAULT;
80 }
81
82 return 0;
83 }
84
85 /*
86 * Copy a request from userspace. If the provided 'req' is larger than the
87 * user buffer then the user buffer is zero extended into the 'req'. If 'req'
88 * is smaller than the user buffer then the uncopied bytes in the user buffer
89 * must be zero.
90 */
91 static int uverbs_request(struct uverbs_attr_bundle *attrs, void *req,
92 size_t req_len)
93 {
94 if (copy_from_user(req, attrs->ucore.inbuf,
95 min(attrs->ucore.inlen, req_len)))
96 return -EFAULT;
97
98 if (attrs->ucore.inlen < req_len) {
99 memset(req + attrs->ucore.inlen, 0,
100 req_len - attrs->ucore.inlen);
101 } else if (attrs->ucore.inlen > req_len) {
102 if (!ib_is_buffer_cleared(attrs->ucore.inbuf + req_len,
103 attrs->ucore.inlen - req_len))
104 return -EOPNOTSUPP;
105 }
106 return 0;
107 }
108
109 /*
110 * Generate the value for the 'response_length' protocol used by write_ex.
111 * This is the number of bytes the kernel actually wrote. Userspace can use
112 * this to detect what structure members in the response the kernel
113 * understood.
114 */
115 static u32 uverbs_response_length(struct uverbs_attr_bundle *attrs,
116 size_t resp_len)
117 {
118 return min_t(size_t, attrs->ucore.outlen, resp_len);
119 }
120
121 /*
122 * The iterator version of the request interface is for handlers that need to
123 * step over a flex array at the end of a command header.
124 */
125 struct uverbs_req_iter {
126 const void __user *cur;
127 const void __user *end;
128 };
129
130 static int uverbs_request_start(struct uverbs_attr_bundle *attrs,
131 struct uverbs_req_iter *iter,
132 void *req,
133 size_t req_len)
134 {
135 if (attrs->ucore.inlen < req_len)
136 return -ENOSPC;
137
138 if (copy_from_user(req, attrs->ucore.inbuf, req_len))
139 return -EFAULT;
140
141 iter->cur = attrs->ucore.inbuf + req_len;
142 iter->end = attrs->ucore.inbuf + attrs->ucore.inlen;
143 return 0;
144 }
145
146 static int uverbs_request_next(struct uverbs_req_iter *iter, void *val,
147 size_t len)
148 {
149 if (iter->cur + len > iter->end)
150 return -ENOSPC;
151
152 if (copy_from_user(val, iter->cur, len))
153 return -EFAULT;
154
155 iter->cur += len;
156 return 0;
157 }
158
159 static const void __user *uverbs_request_next_ptr(struct uverbs_req_iter *iter,
160 size_t len)
161 {
162 const void __user *res = iter->cur;
163
164 if (iter->cur + len > iter->end)
165 return (void __force __user *)ERR_PTR(-ENOSPC);
166 iter->cur += len;
167 return res;
168 }
169
170 static int uverbs_request_finish(struct uverbs_req_iter *iter)
171 {
172 if (!ib_is_buffer_cleared(iter->cur, iter->end - iter->cur))
173 return -EOPNOTSUPP;
174 return 0;
175 }
176
177 /*
178 * When calling a destroy function during an error unwind we need to pass in
179 * the udata that is sanitized of all user arguments. Ie from the driver
180 * perspective it looks like no udata was passed.
181 */
182 struct ib_udata *uverbs_get_cleared_udata(struct uverbs_attr_bundle *attrs)
183 {
184 attrs->driver_udata = (struct ib_udata){};
185 return &attrs->driver_udata;
186 }
187
188 static struct ib_uverbs_completion_event_file *
189 _ib_uverbs_lookup_comp_file(s32 fd, struct uverbs_attr_bundle *attrs)
190 {
191 struct ib_uobject *uobj = ufd_get_read(UVERBS_OBJECT_COMP_CHANNEL,
192 fd, attrs);
193
194 if (IS_ERR(uobj))
195 return (void *)uobj;
196
197 uverbs_uobject_get(uobj);
198 uobj_put_read(uobj);
199
200 return container_of(uobj, struct ib_uverbs_completion_event_file,
201 uobj);
202 }
203 #define ib_uverbs_lookup_comp_file(_fd, _ufile) \
204 _ib_uverbs_lookup_comp_file((_fd)*typecheck(s32, _fd), _ufile)
205
206 int ib_alloc_ucontext(struct uverbs_attr_bundle *attrs)
207 {
208 struct ib_uverbs_file *ufile = attrs->ufile;
209 struct ib_ucontext *ucontext;
210 struct ib_device *ib_dev;
211
212 ib_dev = srcu_dereference(ufile->device->ib_dev,
213 &ufile->device->disassociate_srcu);
214 if (!ib_dev)
215 return -EIO;
216
217 ucontext = rdma_zalloc_drv_obj(ib_dev, ib_ucontext);
218 if (!ucontext)
219 return -ENOMEM;
220
221 ucontext->res.type = RDMA_RESTRACK_CTX;
222 ucontext->device = ib_dev;
223 ucontext->ufile = ufile;
224 xa_init_flags(&ucontext->mmap_xa, XA_FLAGS_ALLOC);
225 attrs->context = ucontext;
226 return 0;
227 }
228
229 int ib_init_ucontext(struct uverbs_attr_bundle *attrs)
230 {
231 struct ib_ucontext *ucontext = attrs->context;
232 struct ib_uverbs_file *file = attrs->ufile;
233 int ret;
234
235 if (!down_read_trylock(&file->hw_destroy_rwsem))
236 return -EIO;
237 mutex_lock(&file->ucontext_lock);
238 if (file->ucontext) {
239 ret = -EINVAL;
240 goto err;
241 }
242
243 ret = ib_rdmacg_try_charge(&ucontext->cg_obj, ucontext->device,
244 RDMACG_RESOURCE_HCA_HANDLE);
245 if (ret)
246 goto err;
247
248 ret = ucontext->device->ops.alloc_ucontext(ucontext,
249 &attrs->driver_udata);
250 if (ret)
251 goto err_uncharge;
252
253 rdma_restrack_uadd(&ucontext->res);
254
255 /*
256 * Make sure that ib_uverbs_get_ucontext() sees the pointer update
257 * only after all writes to setup the ucontext have completed
258 */
259 smp_store_release(&file->ucontext, ucontext);
260
261 mutex_unlock(&file->ucontext_lock);
262 up_read(&file->hw_destroy_rwsem);
263 return 0;
264
265 err_uncharge:
266 ib_rdmacg_uncharge(&ucontext->cg_obj, ucontext->device,
267 RDMACG_RESOURCE_HCA_HANDLE);
268 err:
269 mutex_unlock(&file->ucontext_lock);
270 up_read(&file->hw_destroy_rwsem);
271 return ret;
272 }
273
274 static int ib_uverbs_get_context(struct uverbs_attr_bundle *attrs)
275 {
276 struct ib_uverbs_get_context_resp resp;
277 struct ib_uverbs_get_context cmd;
278 struct ib_device *ib_dev;
279 struct ib_uobject *uobj;
280 int ret;
281
282 ret = uverbs_request(attrs, &cmd, sizeof(cmd));
283 if (ret)
284 return ret;
285
286 ret = ib_alloc_ucontext(attrs);
287 if (ret)
288 return ret;
289
290 uobj = uobj_alloc(UVERBS_OBJECT_ASYNC_EVENT, attrs, &ib_dev);
291 if (IS_ERR(uobj)) {
292 ret = PTR_ERR(uobj);
293 goto err_ucontext;
294 }
295
296 resp = (struct ib_uverbs_get_context_resp){
297 .num_comp_vectors = attrs->ufile->device->num_comp_vectors,
298 .async_fd = uobj->id,
299 };
300 ret = uverbs_response(attrs, &resp, sizeof(resp));
301 if (ret)
302 goto err_uobj;
303
304 ret = ib_init_ucontext(attrs);
305 if (ret)
306 goto err_uobj;
307
308 ib_uverbs_init_async_event_file(
309 container_of(uobj, struct ib_uverbs_async_event_file, uobj));
310 rdma_alloc_commit_uobject(uobj, attrs);
311 return 0;
312
313 err_uobj:
314 rdma_alloc_abort_uobject(uobj, attrs);
315 err_ucontext:
316 kfree(attrs->context);
317 attrs->context = NULL;
318 return ret;
319 }
320
321 static void copy_query_dev_fields(struct ib_ucontext *ucontext,
322 struct ib_uverbs_query_device_resp *resp,
323 struct ib_device_attr *attr)
324 {
325 struct ib_device *ib_dev = ucontext->device;
326
327 resp->fw_ver = attr->fw_ver;
328 resp->node_guid = ib_dev->node_guid;
329 resp->sys_image_guid = attr->sys_image_guid;
330 resp->max_mr_size = attr->max_mr_size;
331 resp->page_size_cap = attr->page_size_cap;
332 resp->vendor_id = attr->vendor_id;
333 resp->vendor_part_id = attr->vendor_part_id;
334 resp->hw_ver = attr->hw_ver;
335 resp->max_qp = attr->max_qp;
336 resp->max_qp_wr = attr->max_qp_wr;
337 resp->device_cap_flags = lower_32_bits(attr->device_cap_flags);
338 resp->max_sge = min(attr->max_send_sge, attr->max_recv_sge);
339 resp->max_sge_rd = attr->max_sge_rd;
340 resp->max_cq = attr->max_cq;
341 resp->max_cqe = attr->max_cqe;
342 resp->max_mr = attr->max_mr;
343 resp->max_pd = attr->max_pd;
344 resp->max_qp_rd_atom = attr->max_qp_rd_atom;
345 resp->max_ee_rd_atom = attr->max_ee_rd_atom;
346 resp->max_res_rd_atom = attr->max_res_rd_atom;
347 resp->max_qp_init_rd_atom = attr->max_qp_init_rd_atom;
348 resp->max_ee_init_rd_atom = attr->max_ee_init_rd_atom;
349 resp->atomic_cap = attr->atomic_cap;
350 resp->max_ee = attr->max_ee;
351 resp->max_rdd = attr->max_rdd;
352 resp->max_mw = attr->max_mw;
353 resp->max_raw_ipv6_qp = attr->max_raw_ipv6_qp;
354 resp->max_raw_ethy_qp = attr->max_raw_ethy_qp;
355 resp->max_mcast_grp = attr->max_mcast_grp;
356 resp->max_mcast_qp_attach = attr->max_mcast_qp_attach;
357 resp->max_total_mcast_qp_attach = attr->max_total_mcast_qp_attach;
358 resp->max_ah = attr->max_ah;
359 resp->max_fmr = attr->max_fmr;
360 resp->max_map_per_fmr = attr->max_map_per_fmr;
361 resp->max_srq = attr->max_srq;
362 resp->max_srq_wr = attr->max_srq_wr;
363 resp->max_srq_sge = attr->max_srq_sge;
364 resp->max_pkeys = attr->max_pkeys;
365 resp->local_ca_ack_delay = attr->local_ca_ack_delay;
366 resp->phys_port_cnt = ib_dev->phys_port_cnt;
367 }
368
369 static int ib_uverbs_query_device(struct uverbs_attr_bundle *attrs)
370 {
371 struct ib_uverbs_query_device cmd;
372 struct ib_uverbs_query_device_resp resp;
373 struct ib_ucontext *ucontext;
374 int ret;
375
376 ucontext = ib_uverbs_get_ucontext(attrs);
377 if (IS_ERR(ucontext))
378 return PTR_ERR(ucontext);
379
380 ret = uverbs_request(attrs, &cmd, sizeof(cmd));
381 if (ret)
382 return ret;
383
384 memset(&resp, 0, sizeof resp);
385 copy_query_dev_fields(ucontext, &resp, &ucontext->device->attrs);
386
387 return uverbs_response(attrs, &resp, sizeof(resp));
388 }
389
390 static int ib_uverbs_query_port(struct uverbs_attr_bundle *attrs)
391 {
392 struct ib_uverbs_query_port cmd;
393 struct ib_uverbs_query_port_resp resp;
394 struct ib_port_attr attr;
395 int ret;
396 struct ib_ucontext *ucontext;
397 struct ib_device *ib_dev;
398
399 ucontext = ib_uverbs_get_ucontext(attrs);
400 if (IS_ERR(ucontext))
401 return PTR_ERR(ucontext);
402 ib_dev = ucontext->device;
403
404 ret = uverbs_request(attrs, &cmd, sizeof(cmd));
405 if (ret)
406 return ret;
407
408 ret = ib_query_port(ib_dev, cmd.port_num, &attr);
409 if (ret)
410 return ret;
411
412 memset(&resp, 0, sizeof resp);
413 copy_port_attr_to_resp(&attr, &resp, ib_dev, cmd.port_num);
414
415 return uverbs_response(attrs, &resp, sizeof(resp));
416 }
417
418 static int ib_uverbs_alloc_pd(struct uverbs_attr_bundle *attrs)
419 {
420 struct ib_uverbs_alloc_pd cmd;
421 struct ib_uverbs_alloc_pd_resp resp;
422 struct ib_uobject *uobj;
423 struct ib_pd *pd;
424 int ret;
425 struct ib_device *ib_dev;
426
427 ret = uverbs_request(attrs, &cmd, sizeof(cmd));
428 if (ret)
429 return ret;
430
431 uobj = uobj_alloc(UVERBS_OBJECT_PD, attrs, &ib_dev);
432 if (IS_ERR(uobj))
433 return PTR_ERR(uobj);
434
435 pd = rdma_zalloc_drv_obj(ib_dev, ib_pd);
436 if (!pd) {
437 ret = -ENOMEM;
438 goto err;
439 }
440
441 pd->device = ib_dev;
442 pd->uobject = uobj;
443 pd->__internal_mr = NULL;
444 atomic_set(&pd->usecnt, 0);
445 pd->res.type = RDMA_RESTRACK_PD;
446
447 ret = ib_dev->ops.alloc_pd(pd, &attrs->driver_udata);
448 if (ret)
449 goto err_alloc;
450
451 uobj->object = pd;
452 memset(&resp, 0, sizeof resp);
453 resp.pd_handle = uobj->id;
454 rdma_restrack_uadd(&pd->res);
455
456 ret = uverbs_response(attrs, &resp, sizeof(resp));
457 if (ret)
458 goto err_copy;
459
460 rdma_alloc_commit_uobject(uobj, attrs);
461 return 0;
462
463 err_copy:
464 ib_dealloc_pd_user(pd, uverbs_get_cleared_udata(attrs));
465 pd = NULL;
466 err_alloc:
467 kfree(pd);
468 err:
469 uobj_alloc_abort(uobj, attrs);
470 return ret;
471 }
472
473 static int ib_uverbs_dealloc_pd(struct uverbs_attr_bundle *attrs)
474 {
475 struct ib_uverbs_dealloc_pd cmd;
476 int ret;
477
478 ret = uverbs_request(attrs, &cmd, sizeof(cmd));
479 if (ret)
480 return ret;
481
482 return uobj_perform_destroy(UVERBS_OBJECT_PD, cmd.pd_handle, attrs);
483 }
484
485 struct xrcd_table_entry {
486 struct rb_node node;
487 struct ib_xrcd *xrcd;
488 struct inode *inode;
489 };
490
491 static int xrcd_table_insert(struct ib_uverbs_device *dev,
492 struct inode *inode,
493 struct ib_xrcd *xrcd)
494 {
495 struct xrcd_table_entry *entry, *scan;
496 struct rb_node **p = &dev->xrcd_tree.rb_node;
497 struct rb_node *parent = NULL;
498
499 entry = kmalloc(sizeof *entry, GFP_KERNEL);
500 if (!entry)
501 return -ENOMEM;
502
503 entry->xrcd = xrcd;
504 entry->inode = inode;
505
506 while (*p) {
507 parent = *p;
508 scan = rb_entry(parent, struct xrcd_table_entry, node);
509
510 if (inode < scan->inode) {
511 p = &(*p)->rb_left;
512 } else if (inode > scan->inode) {
513 p = &(*p)->rb_right;
514 } else {
515 kfree(entry);
516 return -EEXIST;
517 }
518 }
519
520 rb_link_node(&entry->node, parent, p);
521 rb_insert_color(&entry->node, &dev->xrcd_tree);
522 igrab(inode);
523 return 0;
524 }
525
526 static struct xrcd_table_entry *xrcd_table_search(struct ib_uverbs_device *dev,
527 struct inode *inode)
528 {
529 struct xrcd_table_entry *entry;
530 struct rb_node *p = dev->xrcd_tree.rb_node;
531
532 while (p) {
533 entry = rb_entry(p, struct xrcd_table_entry, node);
534
535 if (inode < entry->inode)
536 p = p->rb_left;
537 else if (inode > entry->inode)
538 p = p->rb_right;
539 else
540 return entry;
541 }
542
543 return NULL;
544 }
545
546 static struct ib_xrcd *find_xrcd(struct ib_uverbs_device *dev, struct inode *inode)
547 {
548 struct xrcd_table_entry *entry;
549
550 entry = xrcd_table_search(dev, inode);
551 if (!entry)
552 return NULL;
553
554 return entry->xrcd;
555 }
556
557 static void xrcd_table_delete(struct ib_uverbs_device *dev,
558 struct inode *inode)
559 {
560 struct xrcd_table_entry *entry;
561
562 entry = xrcd_table_search(dev, inode);
563 if (entry) {
564 iput(inode);
565 rb_erase(&entry->node, &dev->xrcd_tree);
566 kfree(entry);
567 }
568 }
569
570 static int ib_uverbs_open_xrcd(struct uverbs_attr_bundle *attrs)
571 {
572 struct ib_uverbs_device *ibudev = attrs->ufile->device;
573 struct ib_uverbs_open_xrcd cmd;
574 struct ib_uverbs_open_xrcd_resp resp;
575 struct ib_uxrcd_object *obj;
576 struct ib_xrcd *xrcd = NULL;
577 struct fd f = {NULL, 0};
578 struct inode *inode = NULL;
579 int ret = 0;
580 int new_xrcd = 0;
581 struct ib_device *ib_dev;
582
583 ret = uverbs_request(attrs, &cmd, sizeof(cmd));
584 if (ret)
585 return ret;
586
587 mutex_lock(&ibudev->xrcd_tree_mutex);
588
589 if (cmd.fd != -1) {
590 /* search for file descriptor */
591 f = fdget(cmd.fd);
592 if (!f.file) {
593 ret = -EBADF;
594 goto err_tree_mutex_unlock;
595 }
596
597 inode = file_inode(f.file);
598 xrcd = find_xrcd(ibudev, inode);
599 if (!xrcd && !(cmd.oflags & O_CREAT)) {
600 /* no file descriptor. Need CREATE flag */
601 ret = -EAGAIN;
602 goto err_tree_mutex_unlock;
603 }
604
605 if (xrcd && cmd.oflags & O_EXCL) {
606 ret = -EINVAL;
607 goto err_tree_mutex_unlock;
608 }
609 }
610
611 obj = (struct ib_uxrcd_object *)uobj_alloc(UVERBS_OBJECT_XRCD, attrs,
612 &ib_dev);
613 if (IS_ERR(obj)) {
614 ret = PTR_ERR(obj);
615 goto err_tree_mutex_unlock;
616 }
617
618 if (!xrcd) {
619 xrcd = ib_dev->ops.alloc_xrcd(ib_dev, &attrs->driver_udata);
620 if (IS_ERR(xrcd)) {
621 ret = PTR_ERR(xrcd);
622 goto err;
623 }
624
625 xrcd->inode = inode;
626 xrcd->device = ib_dev;
627 atomic_set(&xrcd->usecnt, 0);
628 mutex_init(&xrcd->tgt_qp_mutex);
629 INIT_LIST_HEAD(&xrcd->tgt_qp_list);
630 new_xrcd = 1;
631 }
632
633 atomic_set(&obj->refcnt, 0);
634 obj->uobject.object = xrcd;
635 memset(&resp, 0, sizeof resp);
636 resp.xrcd_handle = obj->uobject.id;
637
638 if (inode) {
639 if (new_xrcd) {
640 /* create new inode/xrcd table entry */
641 ret = xrcd_table_insert(ibudev, inode, xrcd);
642 if (ret)
643 goto err_dealloc_xrcd;
644 }
645 atomic_inc(&xrcd->usecnt);
646 }
647
648 ret = uverbs_response(attrs, &resp, sizeof(resp));
649 if (ret)
650 goto err_copy;
651
652 if (f.file)
653 fdput(f);
654
655 mutex_unlock(&ibudev->xrcd_tree_mutex);
656
657 rdma_alloc_commit_uobject(&obj->uobject, attrs);
658 return 0;
659
660 err_copy:
661 if (inode) {
662 if (new_xrcd)
663 xrcd_table_delete(ibudev, inode);
664 atomic_dec(&xrcd->usecnt);
665 }
666
667 err_dealloc_xrcd:
668 ib_dealloc_xrcd(xrcd, uverbs_get_cleared_udata(attrs));
669
670 err:
671 uobj_alloc_abort(&obj->uobject, attrs);
672
673 err_tree_mutex_unlock:
674 if (f.file)
675 fdput(f);
676
677 mutex_unlock(&ibudev->xrcd_tree_mutex);
678
679 return ret;
680 }
681
682 static int ib_uverbs_close_xrcd(struct uverbs_attr_bundle *attrs)
683 {
684 struct ib_uverbs_close_xrcd cmd;
685 int ret;
686
687 ret = uverbs_request(attrs, &cmd, sizeof(cmd));
688 if (ret)
689 return ret;
690
691 return uobj_perform_destroy(UVERBS_OBJECT_XRCD, cmd.xrcd_handle, attrs);
692 }
693
694 int ib_uverbs_dealloc_xrcd(struct ib_uobject *uobject, struct ib_xrcd *xrcd,
695 enum rdma_remove_reason why,
696 struct uverbs_attr_bundle *attrs)
697 {
698 struct inode *inode;
699 int ret;
700 struct ib_uverbs_device *dev = attrs->ufile->device;
701
702 inode = xrcd->inode;
703 if (inode && !atomic_dec_and_test(&xrcd->usecnt))
704 return 0;
705
706 ret = ib_dealloc_xrcd(xrcd, &attrs->driver_udata);
707
708 if (ib_is_destroy_retryable(ret, why, uobject)) {
709 atomic_inc(&xrcd->usecnt);
710 return ret;
711 }
712
713 if (inode)
714 xrcd_table_delete(dev, inode);
715
716 return ret;
717 }
718
719 static int ib_uverbs_reg_mr(struct uverbs_attr_bundle *attrs)
720 {
721 struct ib_uverbs_reg_mr cmd;
722 struct ib_uverbs_reg_mr_resp resp;
723 struct ib_uobject *uobj;
724 struct ib_pd *pd;
725 struct ib_mr *mr;
726 int ret;
727 struct ib_device *ib_dev;
728
729 ret = uverbs_request(attrs, &cmd, sizeof(cmd));
730 if (ret)
731 return ret;
732
733 if ((cmd.start & ~PAGE_MASK) != (cmd.hca_va & ~PAGE_MASK))
734 return -EINVAL;
735
736 ret = ib_check_mr_access(cmd.access_flags);
737 if (ret)
738 return ret;
739
740 uobj = uobj_alloc(UVERBS_OBJECT_MR, attrs, &ib_dev);
741 if (IS_ERR(uobj))
742 return PTR_ERR(uobj);
743
744 pd = uobj_get_obj_read(pd, UVERBS_OBJECT_PD, cmd.pd_handle, attrs);
745 if (!pd) {
746 ret = -EINVAL;
747 goto err_free;
748 }
749
750 if (cmd.access_flags & IB_ACCESS_ON_DEMAND) {
751 if (!(pd->device->attrs.device_cap_flags &
752 IB_DEVICE_ON_DEMAND_PAGING)) {
753 pr_debug("ODP support not available\n");
754 ret = -EINVAL;
755 goto err_put;
756 }
757 }
758
759 mr = pd->device->ops.reg_user_mr(pd, cmd.start, cmd.length, cmd.hca_va,
760 cmd.access_flags,
761 &attrs->driver_udata);
762 if (IS_ERR(mr)) {
763 ret = PTR_ERR(mr);
764 goto err_put;
765 }
766
767 mr->device = pd->device;
768 mr->pd = pd;
769 mr->type = IB_MR_TYPE_USER;
770 mr->dm = NULL;
771 mr->sig_attrs = NULL;
772 mr->uobject = uobj;
773 atomic_inc(&pd->usecnt);
774 mr->res.type = RDMA_RESTRACK_MR;
775 rdma_restrack_uadd(&mr->res);
776
777 uobj->object = mr;
778
779 memset(&resp, 0, sizeof resp);
780 resp.lkey = mr->lkey;
781 resp.rkey = mr->rkey;
782 resp.mr_handle = uobj->id;
783
784 ret = uverbs_response(attrs, &resp, sizeof(resp));
785 if (ret)
786 goto err_copy;
787
788 uobj_put_obj_read(pd);
789
790 rdma_alloc_commit_uobject(uobj, attrs);
791 return 0;
792
793 err_copy:
794 ib_dereg_mr_user(mr, uverbs_get_cleared_udata(attrs));
795
796 err_put:
797 uobj_put_obj_read(pd);
798
799 err_free:
800 uobj_alloc_abort(uobj, attrs);
801 return ret;
802 }
803
804 static int ib_uverbs_rereg_mr(struct uverbs_attr_bundle *attrs)
805 {
806 struct ib_uverbs_rereg_mr cmd;
807 struct ib_uverbs_rereg_mr_resp resp;
808 struct ib_pd *pd = NULL;
809 struct ib_mr *mr;
810 struct ib_pd *old_pd;
811 int ret;
812 struct ib_uobject *uobj;
813
814 ret = uverbs_request(attrs, &cmd, sizeof(cmd));
815 if (ret)
816 return ret;
817
818 if (cmd.flags & ~IB_MR_REREG_SUPPORTED || !cmd.flags)
819 return -EINVAL;
820
821 if ((cmd.flags & IB_MR_REREG_TRANS) &&
822 (!cmd.start || !cmd.hca_va || 0 >= cmd.length ||
823 (cmd.start & ~PAGE_MASK) != (cmd.hca_va & ~PAGE_MASK)))
824 return -EINVAL;
825
826 uobj = uobj_get_write(UVERBS_OBJECT_MR, cmd.mr_handle, attrs);
827 if (IS_ERR(uobj))
828 return PTR_ERR(uobj);
829
830 mr = uobj->object;
831
832 if (mr->dm) {
833 ret = -EINVAL;
834 goto put_uobjs;
835 }
836
837 if (cmd.flags & IB_MR_REREG_ACCESS) {
838 ret = ib_check_mr_access(cmd.access_flags);
839 if (ret)
840 goto put_uobjs;
841 }
842
843 if (cmd.flags & IB_MR_REREG_PD) {
844 pd = uobj_get_obj_read(pd, UVERBS_OBJECT_PD, cmd.pd_handle,
845 attrs);
846 if (!pd) {
847 ret = -EINVAL;
848 goto put_uobjs;
849 }
850 }
851
852 old_pd = mr->pd;
853 ret = mr->device->ops.rereg_user_mr(mr, cmd.flags, cmd.start,
854 cmd.length, cmd.hca_va,
855 cmd.access_flags, pd,
856 &attrs->driver_udata);
857 if (ret)
858 goto put_uobj_pd;
859
860 if (cmd.flags & IB_MR_REREG_PD) {
861 atomic_inc(&pd->usecnt);
862 mr->pd = pd;
863 atomic_dec(&old_pd->usecnt);
864 }
865
866 memset(&resp, 0, sizeof(resp));
867 resp.lkey = mr->lkey;
868 resp.rkey = mr->rkey;
869
870 ret = uverbs_response(attrs, &resp, sizeof(resp));
871
872 put_uobj_pd:
873 if (cmd.flags & IB_MR_REREG_PD)
874 uobj_put_obj_read(pd);
875
876 put_uobjs:
877 uobj_put_write(uobj);
878
879 return ret;
880 }
881
882 static int ib_uverbs_dereg_mr(struct uverbs_attr_bundle *attrs)
883 {
884 struct ib_uverbs_dereg_mr cmd;
885 int ret;
886
887 ret = uverbs_request(attrs, &cmd, sizeof(cmd));
888 if (ret)
889 return ret;
890
891 return uobj_perform_destroy(UVERBS_OBJECT_MR, cmd.mr_handle, attrs);
892 }
893
894 static int ib_uverbs_alloc_mw(struct uverbs_attr_bundle *attrs)
895 {
896 struct ib_uverbs_alloc_mw cmd;
897 struct ib_uverbs_alloc_mw_resp resp;
898 struct ib_uobject *uobj;
899 struct ib_pd *pd;
900 struct ib_mw *mw;
901 int ret;
902 struct ib_device *ib_dev;
903
904 ret = uverbs_request(attrs, &cmd, sizeof(cmd));
905 if (ret)
906 return ret;
907
908 uobj = uobj_alloc(UVERBS_OBJECT_MW, attrs, &ib_dev);
909 if (IS_ERR(uobj))
910 return PTR_ERR(uobj);
911
912 pd = uobj_get_obj_read(pd, UVERBS_OBJECT_PD, cmd.pd_handle, attrs);
913 if (!pd) {
914 ret = -EINVAL;
915 goto err_free;
916 }
917
918 if (cmd.mw_type != IB_MW_TYPE_1 && cmd.mw_type != IB_MW_TYPE_2) {
919 ret = -EINVAL;
920 goto err_put;
921 }
922
923 mw = pd->device->ops.alloc_mw(pd, cmd.mw_type, &attrs->driver_udata);
924 if (IS_ERR(mw)) {
925 ret = PTR_ERR(mw);
926 goto err_put;
927 }
928
929 mw->device = pd->device;
930 mw->pd = pd;
931 mw->uobject = uobj;
932 atomic_inc(&pd->usecnt);
933
934 uobj->object = mw;
935
936 memset(&resp, 0, sizeof(resp));
937 resp.rkey = mw->rkey;
938 resp.mw_handle = uobj->id;
939
940 ret = uverbs_response(attrs, &resp, sizeof(resp));
941 if (ret)
942 goto err_copy;
943
944 uobj_put_obj_read(pd);
945 rdma_alloc_commit_uobject(uobj, attrs);
946 return 0;
947
948 err_copy:
949 uverbs_dealloc_mw(mw);
950 err_put:
951 uobj_put_obj_read(pd);
952 err_free:
953 uobj_alloc_abort(uobj, attrs);
954 return ret;
955 }
956
957 static int ib_uverbs_dealloc_mw(struct uverbs_attr_bundle *attrs)
958 {
959 struct ib_uverbs_dealloc_mw cmd;
960 int ret;
961
962 ret = uverbs_request(attrs, &cmd, sizeof(cmd));
963 if (ret)
964 return ret;
965
966 return uobj_perform_destroy(UVERBS_OBJECT_MW, cmd.mw_handle, attrs);
967 }
968
969 static int ib_uverbs_create_comp_channel(struct uverbs_attr_bundle *attrs)
970 {
971 struct ib_uverbs_create_comp_channel cmd;
972 struct ib_uverbs_create_comp_channel_resp resp;
973 struct ib_uobject *uobj;
974 struct ib_uverbs_completion_event_file *ev_file;
975 struct ib_device *ib_dev;
976 int ret;
977
978 ret = uverbs_request(attrs, &cmd, sizeof(cmd));
979 if (ret)
980 return ret;
981
982 uobj = uobj_alloc(UVERBS_OBJECT_COMP_CHANNEL, attrs, &ib_dev);
983 if (IS_ERR(uobj))
984 return PTR_ERR(uobj);
985
986 resp.fd = uobj->id;
987
988 ev_file = container_of(uobj, struct ib_uverbs_completion_event_file,
989 uobj);
990 ib_uverbs_init_event_queue(&ev_file->ev_queue);
991
992 ret = uverbs_response(attrs, &resp, sizeof(resp));
993 if (ret) {
994 uobj_alloc_abort(uobj, attrs);
995 return ret;
996 }
997
998 rdma_alloc_commit_uobject(uobj, attrs);
999 return 0;
1000 }
1001
1002 static struct ib_ucq_object *create_cq(struct uverbs_attr_bundle *attrs,
1003 struct ib_uverbs_ex_create_cq *cmd)
1004 {
1005 struct ib_ucq_object *obj;
1006 struct ib_uverbs_completion_event_file *ev_file = NULL;
1007 struct ib_cq *cq;
1008 int ret;
1009 struct ib_uverbs_ex_create_cq_resp resp;
1010 struct ib_cq_init_attr attr = {};
1011 struct ib_device *ib_dev;
1012
1013 if (cmd->comp_vector >= attrs->ufile->device->num_comp_vectors)
1014 return ERR_PTR(-EINVAL);
1015
1016 obj = (struct ib_ucq_object *)uobj_alloc(UVERBS_OBJECT_CQ, attrs,
1017 &ib_dev);
1018 if (IS_ERR(obj))
1019 return obj;
1020
1021 if (cmd->comp_channel >= 0) {
1022 ev_file = ib_uverbs_lookup_comp_file(cmd->comp_channel, attrs);
1023 if (IS_ERR(ev_file)) {
1024 ret = PTR_ERR(ev_file);
1025 goto err;
1026 }
1027 }
1028
1029 obj->uevent.uobject.user_handle = cmd->user_handle;
1030 INIT_LIST_HEAD(&obj->comp_list);
1031 INIT_LIST_HEAD(&obj->uevent.event_list);
1032
1033 attr.cqe = cmd->cqe;
1034 attr.comp_vector = cmd->comp_vector;
1035 attr.flags = cmd->flags;
1036
1037 cq = rdma_zalloc_drv_obj(ib_dev, ib_cq);
1038 if (!cq) {
1039 ret = -ENOMEM;
1040 goto err_file;
1041 }
1042 cq->device = ib_dev;
1043 cq->uobject = obj;
1044 cq->comp_handler = ib_uverbs_comp_handler;
1045 cq->event_handler = ib_uverbs_cq_event_handler;
1046 cq->cq_context = ev_file ? &ev_file->ev_queue : NULL;
1047 atomic_set(&cq->usecnt, 0);
1048
1049 ret = ib_dev->ops.create_cq(cq, &attr, &attrs->driver_udata);
1050 if (ret)
1051 goto err_free;
1052
1053 obj->uevent.uobject.object = cq;
1054 memset(&resp, 0, sizeof resp);
1055 resp.base.cq_handle = obj->uevent.uobject.id;
1056 resp.base.cqe = cq->cqe;
1057 resp.response_length = uverbs_response_length(attrs, sizeof(resp));
1058
1059 cq->res.type = RDMA_RESTRACK_CQ;
1060 rdma_restrack_uadd(&cq->res);
1061
1062 ret = uverbs_response(attrs, &resp, sizeof(resp));
1063 if (ret)
1064 goto err_cb;
1065
1066 rdma_alloc_commit_uobject(&obj->uevent.uobject, attrs);
1067 return obj;
1068
1069 err_cb:
1070 ib_destroy_cq_user(cq, uverbs_get_cleared_udata(attrs));
1071 cq = NULL;
1072 err_free:
1073 kfree(cq);
1074 err_file:
1075 if (ev_file)
1076 ib_uverbs_release_ucq(ev_file, obj);
1077
1078 err:
1079 uobj_alloc_abort(&obj->uevent.uobject, attrs);
1080
1081 return ERR_PTR(ret);
1082 }
1083
1084 static int ib_uverbs_create_cq(struct uverbs_attr_bundle *attrs)
1085 {
1086 struct ib_uverbs_create_cq cmd;
1087 struct ib_uverbs_ex_create_cq cmd_ex;
1088 struct ib_ucq_object *obj;
1089 int ret;
1090
1091 ret = uverbs_request(attrs, &cmd, sizeof(cmd));
1092 if (ret)
1093 return ret;
1094
1095 memset(&cmd_ex, 0, sizeof(cmd_ex));
1096 cmd_ex.user_handle = cmd.user_handle;
1097 cmd_ex.cqe = cmd.cqe;
1098 cmd_ex.comp_vector = cmd.comp_vector;
1099 cmd_ex.comp_channel = cmd.comp_channel;
1100
1101 obj = create_cq(attrs, &cmd_ex);
1102 return PTR_ERR_OR_ZERO(obj);
1103 }
1104
1105 static int ib_uverbs_ex_create_cq(struct uverbs_attr_bundle *attrs)
1106 {
1107 struct ib_uverbs_ex_create_cq cmd;
1108 struct ib_ucq_object *obj;
1109 int ret;
1110
1111 ret = uverbs_request(attrs, &cmd, sizeof(cmd));
1112 if (ret)
1113 return ret;
1114
1115 if (cmd.comp_mask)
1116 return -EINVAL;
1117
1118 if (cmd.reserved)
1119 return -EINVAL;
1120
1121 obj = create_cq(attrs, &cmd);
1122 return PTR_ERR_OR_ZERO(obj);
1123 }
1124
1125 static int ib_uverbs_resize_cq(struct uverbs_attr_bundle *attrs)
1126 {
1127 struct ib_uverbs_resize_cq cmd;
1128 struct ib_uverbs_resize_cq_resp resp = {};
1129 struct ib_cq *cq;
1130 int ret = -EINVAL;
1131
1132 ret = uverbs_request(attrs, &cmd, sizeof(cmd));
1133 if (ret)
1134 return ret;
1135
1136 cq = uobj_get_obj_read(cq, UVERBS_OBJECT_CQ, cmd.cq_handle, attrs);
1137 if (!cq)
1138 return -EINVAL;
1139
1140 ret = cq->device->ops.resize_cq(cq, cmd.cqe, &attrs->driver_udata);
1141 if (ret)
1142 goto out;
1143
1144 resp.cqe = cq->cqe;
1145
1146 ret = uverbs_response(attrs, &resp, sizeof(resp));
1147 out:
1148 rdma_lookup_put_uobject(&cq->uobject->uevent.uobject,
1149 UVERBS_LOOKUP_READ);
1150
1151 return ret;
1152 }
1153
1154 static int copy_wc_to_user(struct ib_device *ib_dev, void __user *dest,
1155 struct ib_wc *wc)
1156 {
1157 struct ib_uverbs_wc tmp;
1158
1159 tmp.wr_id = wc->wr_id;
1160 tmp.status = wc->status;
1161 tmp.opcode = wc->opcode;
1162 tmp.vendor_err = wc->vendor_err;
1163 tmp.byte_len = wc->byte_len;
1164 tmp.ex.imm_data = wc->ex.imm_data;
1165 tmp.qp_num = wc->qp->qp_num;
1166 tmp.src_qp = wc->src_qp;
1167 tmp.wc_flags = wc->wc_flags;
1168 tmp.pkey_index = wc->pkey_index;
1169 if (rdma_cap_opa_ah(ib_dev, wc->port_num))
1170 tmp.slid = OPA_TO_IB_UCAST_LID(wc->slid);
1171 else
1172 tmp.slid = ib_lid_cpu16(wc->slid);
1173 tmp.sl = wc->sl;
1174 tmp.dlid_path_bits = wc->dlid_path_bits;
1175 tmp.port_num = wc->port_num;
1176 tmp.reserved = 0;
1177
1178 if (copy_to_user(dest, &tmp, sizeof tmp))
1179 return -EFAULT;
1180
1181 return 0;
1182 }
1183
1184 static int ib_uverbs_poll_cq(struct uverbs_attr_bundle *attrs)
1185 {
1186 struct ib_uverbs_poll_cq cmd;
1187 struct ib_uverbs_poll_cq_resp resp;
1188 u8 __user *header_ptr;
1189 u8 __user *data_ptr;
1190 struct ib_cq *cq;
1191 struct ib_wc wc;
1192 int ret;
1193
1194 ret = uverbs_request(attrs, &cmd, sizeof(cmd));
1195 if (ret)
1196 return ret;
1197
1198 cq = uobj_get_obj_read(cq, UVERBS_OBJECT_CQ, cmd.cq_handle, attrs);
1199 if (!cq)
1200 return -EINVAL;
1201
1202 /* we copy a struct ib_uverbs_poll_cq_resp to user space */
1203 header_ptr = attrs->ucore.outbuf;
1204 data_ptr = header_ptr + sizeof resp;
1205
1206 memset(&resp, 0, sizeof resp);
1207 while (resp.count < cmd.ne) {
1208 ret = ib_poll_cq(cq, 1, &wc);
1209 if (ret < 0)
1210 goto out_put;
1211 if (!ret)
1212 break;
1213
1214 ret = copy_wc_to_user(cq->device, data_ptr, &wc);
1215 if (ret)
1216 goto out_put;
1217
1218 data_ptr += sizeof(struct ib_uverbs_wc);
1219 ++resp.count;
1220 }
1221
1222 if (copy_to_user(header_ptr, &resp, sizeof resp)) {
1223 ret = -EFAULT;
1224 goto out_put;
1225 }
1226 ret = 0;
1227
1228 if (uverbs_attr_is_valid(attrs, UVERBS_ATTR_CORE_OUT))
1229 ret = uverbs_output_written(attrs, UVERBS_ATTR_CORE_OUT);
1230
1231 out_put:
1232 rdma_lookup_put_uobject(&cq->uobject->uevent.uobject,
1233 UVERBS_LOOKUP_READ);
1234 return ret;
1235 }
1236
1237 static int ib_uverbs_req_notify_cq(struct uverbs_attr_bundle *attrs)
1238 {
1239 struct ib_uverbs_req_notify_cq cmd;
1240 struct ib_cq *cq;
1241 int ret;
1242
1243 ret = uverbs_request(attrs, &cmd, sizeof(cmd));
1244 if (ret)
1245 return ret;
1246
1247 cq = uobj_get_obj_read(cq, UVERBS_OBJECT_CQ, cmd.cq_handle, attrs);
1248 if (!cq)
1249 return -EINVAL;
1250
1251 ib_req_notify_cq(cq, cmd.solicited_only ?
1252 IB_CQ_SOLICITED : IB_CQ_NEXT_COMP);
1253
1254 rdma_lookup_put_uobject(&cq->uobject->uevent.uobject,
1255 UVERBS_LOOKUP_READ);
1256 return 0;
1257 }
1258
1259 static int ib_uverbs_destroy_cq(struct uverbs_attr_bundle *attrs)
1260 {
1261 struct ib_uverbs_destroy_cq cmd;
1262 struct ib_uverbs_destroy_cq_resp resp;
1263 struct ib_uobject *uobj;
1264 struct ib_ucq_object *obj;
1265 int ret;
1266
1267 ret = uverbs_request(attrs, &cmd, sizeof(cmd));
1268 if (ret)
1269 return ret;
1270
1271 uobj = uobj_get_destroy(UVERBS_OBJECT_CQ, cmd.cq_handle, attrs);
1272 if (IS_ERR(uobj))
1273 return PTR_ERR(uobj);
1274
1275 obj = container_of(uobj, struct ib_ucq_object, uevent.uobject);
1276 memset(&resp, 0, sizeof(resp));
1277 resp.comp_events_reported = obj->comp_events_reported;
1278 resp.async_events_reported = obj->uevent.events_reported;
1279
1280 uobj_put_destroy(uobj);
1281
1282 return uverbs_response(attrs, &resp, sizeof(resp));
1283 }
1284
1285 static int create_qp(struct uverbs_attr_bundle *attrs,
1286 struct ib_uverbs_ex_create_qp *cmd)
1287 {
1288 struct ib_uqp_object *obj;
1289 struct ib_device *device;
1290 struct ib_pd *pd = NULL;
1291 struct ib_xrcd *xrcd = NULL;
1292 struct ib_uobject *xrcd_uobj = ERR_PTR(-ENOENT);
1293 struct ib_cq *scq = NULL, *rcq = NULL;
1294 struct ib_srq *srq = NULL;
1295 struct ib_qp *qp;
1296 struct ib_qp_init_attr attr = {};
1297 struct ib_uverbs_ex_create_qp_resp resp;
1298 int ret;
1299 struct ib_rwq_ind_table *ind_tbl = NULL;
1300 bool has_sq = true;
1301 struct ib_device *ib_dev;
1302
1303 if (cmd->qp_type == IB_QPT_RAW_PACKET && !capable(CAP_NET_RAW))
1304 return -EPERM;
1305
1306 obj = (struct ib_uqp_object *)uobj_alloc(UVERBS_OBJECT_QP, attrs,
1307 &ib_dev);
1308 if (IS_ERR(obj))
1309 return PTR_ERR(obj);
1310 obj->uxrcd = NULL;
1311 obj->uevent.uobject.user_handle = cmd->user_handle;
1312 mutex_init(&obj->mcast_lock);
1313
1314 if (cmd->comp_mask & IB_UVERBS_CREATE_QP_MASK_IND_TABLE) {
1315 ind_tbl = uobj_get_obj_read(rwq_ind_table,
1316 UVERBS_OBJECT_RWQ_IND_TBL,
1317 cmd->rwq_ind_tbl_handle, attrs);
1318 if (!ind_tbl) {
1319 ret = -EINVAL;
1320 goto err_put;
1321 }
1322
1323 attr.rwq_ind_tbl = ind_tbl;
1324 }
1325
1326 if (ind_tbl && (cmd->max_recv_wr || cmd->max_recv_sge || cmd->is_srq)) {
1327 ret = -EINVAL;
1328 goto err_put;
1329 }
1330
1331 if (ind_tbl && !cmd->max_send_wr)
1332 has_sq = false;
1333
1334 if (cmd->qp_type == IB_QPT_XRC_TGT) {
1335 xrcd_uobj = uobj_get_read(UVERBS_OBJECT_XRCD, cmd->pd_handle,
1336 attrs);
1337
1338 if (IS_ERR(xrcd_uobj)) {
1339 ret = -EINVAL;
1340 goto err_put;
1341 }
1342
1343 xrcd = (struct ib_xrcd *)xrcd_uobj->object;
1344 if (!xrcd) {
1345 ret = -EINVAL;
1346 goto err_put;
1347 }
1348 device = xrcd->device;
1349 } else {
1350 if (cmd->qp_type == IB_QPT_XRC_INI) {
1351 cmd->max_recv_wr = 0;
1352 cmd->max_recv_sge = 0;
1353 } else {
1354 if (cmd->is_srq) {
1355 srq = uobj_get_obj_read(srq, UVERBS_OBJECT_SRQ,
1356 cmd->srq_handle, attrs);
1357 if (!srq || srq->srq_type == IB_SRQT_XRC) {
1358 ret = -EINVAL;
1359 goto err_put;
1360 }
1361 }
1362
1363 if (!ind_tbl) {
1364 if (cmd->recv_cq_handle != cmd->send_cq_handle) {
1365 rcq = uobj_get_obj_read(
1366 cq, UVERBS_OBJECT_CQ,
1367 cmd->recv_cq_handle, attrs);
1368 if (!rcq) {
1369 ret = -EINVAL;
1370 goto err_put;
1371 }
1372 }
1373 }
1374 }
1375
1376 if (has_sq)
1377 scq = uobj_get_obj_read(cq, UVERBS_OBJECT_CQ,
1378 cmd->send_cq_handle, attrs);
1379 if (!ind_tbl)
1380 rcq = rcq ?: scq;
1381 pd = uobj_get_obj_read(pd, UVERBS_OBJECT_PD, cmd->pd_handle,
1382 attrs);
1383 if (!pd || (!scq && has_sq)) {
1384 ret = -EINVAL;
1385 goto err_put;
1386 }
1387
1388 device = pd->device;
1389 }
1390
1391 attr.event_handler = ib_uverbs_qp_event_handler;
1392 attr.send_cq = scq;
1393 attr.recv_cq = rcq;
1394 attr.srq = srq;
1395 attr.xrcd = xrcd;
1396 attr.sq_sig_type = cmd->sq_sig_all ? IB_SIGNAL_ALL_WR :
1397 IB_SIGNAL_REQ_WR;
1398 attr.qp_type = cmd->qp_type;
1399 attr.create_flags = 0;
1400
1401 attr.cap.max_send_wr = cmd->max_send_wr;
1402 attr.cap.max_recv_wr = cmd->max_recv_wr;
1403 attr.cap.max_send_sge = cmd->max_send_sge;
1404 attr.cap.max_recv_sge = cmd->max_recv_sge;
1405 attr.cap.max_inline_data = cmd->max_inline_data;
1406
1407 INIT_LIST_HEAD(&obj->uevent.event_list);
1408 INIT_LIST_HEAD(&obj->mcast_list);
1409
1410 attr.create_flags = cmd->create_flags;
1411 if (attr.create_flags & ~(IB_QP_CREATE_BLOCK_MULTICAST_LOOPBACK |
1412 IB_QP_CREATE_CROSS_CHANNEL |
1413 IB_QP_CREATE_MANAGED_SEND |
1414 IB_QP_CREATE_MANAGED_RECV |
1415 IB_QP_CREATE_SCATTER_FCS |
1416 IB_QP_CREATE_CVLAN_STRIPPING |
1417 IB_QP_CREATE_SOURCE_QPN |
1418 IB_QP_CREATE_PCI_WRITE_END_PADDING)) {
1419 ret = -EINVAL;
1420 goto err_put;
1421 }
1422
1423 if (attr.create_flags & IB_QP_CREATE_SOURCE_QPN) {
1424 if (!capable(CAP_NET_RAW)) {
1425 ret = -EPERM;
1426 goto err_put;
1427 }
1428
1429 attr.source_qpn = cmd->source_qpn;
1430 }
1431
1432 if (cmd->qp_type == IB_QPT_XRC_TGT)
1433 qp = ib_create_qp(pd, &attr);
1434 else
1435 qp = _ib_create_qp(device, pd, &attr, &attrs->driver_udata,
1436 obj);
1437
1438 if (IS_ERR(qp)) {
1439 ret = PTR_ERR(qp);
1440 goto err_put;
1441 }
1442
1443 if (cmd->qp_type != IB_QPT_XRC_TGT) {
1444 ret = ib_create_qp_security(qp, device);
1445 if (ret)
1446 goto err_cb;
1447
1448 atomic_inc(&pd->usecnt);
1449 if (attr.send_cq)
1450 atomic_inc(&attr.send_cq->usecnt);
1451 if (attr.recv_cq)
1452 atomic_inc(&attr.recv_cq->usecnt);
1453 if (attr.srq)
1454 atomic_inc(&attr.srq->usecnt);
1455 if (ind_tbl)
1456 atomic_inc(&ind_tbl->usecnt);
1457 } else {
1458 /* It is done in _ib_create_qp for other QP types */
1459 qp->uobject = obj;
1460 }
1461
1462 obj->uevent.uobject.object = qp;
1463
1464 memset(&resp, 0, sizeof resp);
1465 resp.base.qpn = qp->qp_num;
1466 resp.base.qp_handle = obj->uevent.uobject.id;
1467 resp.base.max_recv_sge = attr.cap.max_recv_sge;
1468 resp.base.max_send_sge = attr.cap.max_send_sge;
1469 resp.base.max_recv_wr = attr.cap.max_recv_wr;
1470 resp.base.max_send_wr = attr.cap.max_send_wr;
1471 resp.base.max_inline_data = attr.cap.max_inline_data;
1472 resp.response_length = uverbs_response_length(attrs, sizeof(resp));
1473
1474 ret = uverbs_response(attrs, &resp, sizeof(resp));
1475 if (ret)
1476 goto err_cb;
1477
1478 if (xrcd) {
1479 obj->uxrcd = container_of(xrcd_uobj, struct ib_uxrcd_object,
1480 uobject);
1481 atomic_inc(&obj->uxrcd->refcnt);
1482 uobj_put_read(xrcd_uobj);
1483 }
1484
1485 if (pd)
1486 uobj_put_obj_read(pd);
1487 if (scq)
1488 rdma_lookup_put_uobject(&scq->uobject->uevent.uobject,
1489 UVERBS_LOOKUP_READ);
1490 if (rcq && rcq != scq)
1491 rdma_lookup_put_uobject(&rcq->uobject->uevent.uobject,
1492 UVERBS_LOOKUP_READ);
1493 if (srq)
1494 rdma_lookup_put_uobject(&srq->uobject->uevent.uobject,
1495 UVERBS_LOOKUP_READ);
1496 if (ind_tbl)
1497 uobj_put_obj_read(ind_tbl);
1498
1499 rdma_alloc_commit_uobject(&obj->uevent.uobject, attrs);
1500 return 0;
1501 err_cb:
1502 ib_destroy_qp_user(qp, uverbs_get_cleared_udata(attrs));
1503
1504 err_put:
1505 if (!IS_ERR(xrcd_uobj))
1506 uobj_put_read(xrcd_uobj);
1507 if (pd)
1508 uobj_put_obj_read(pd);
1509 if (scq)
1510 rdma_lookup_put_uobject(&scq->uobject->uevent.uobject,
1511 UVERBS_LOOKUP_READ);
1512 if (rcq && rcq != scq)
1513 rdma_lookup_put_uobject(&rcq->uobject->uevent.uobject,
1514 UVERBS_LOOKUP_READ);
1515 if (srq)
1516 rdma_lookup_put_uobject(&srq->uobject->uevent.uobject,
1517 UVERBS_LOOKUP_READ);
1518 if (ind_tbl)
1519 uobj_put_obj_read(ind_tbl);
1520
1521 uobj_alloc_abort(&obj->uevent.uobject, attrs);
1522 return ret;
1523 }
1524
1525 static int ib_uverbs_create_qp(struct uverbs_attr_bundle *attrs)
1526 {
1527 struct ib_uverbs_create_qp cmd;
1528 struct ib_uverbs_ex_create_qp cmd_ex;
1529 int ret;
1530
1531 ret = uverbs_request(attrs, &cmd, sizeof(cmd));
1532 if (ret)
1533 return ret;
1534
1535 memset(&cmd_ex, 0, sizeof(cmd_ex));
1536 cmd_ex.user_handle = cmd.user_handle;
1537 cmd_ex.pd_handle = cmd.pd_handle;
1538 cmd_ex.send_cq_handle = cmd.send_cq_handle;
1539 cmd_ex.recv_cq_handle = cmd.recv_cq_handle;
1540 cmd_ex.srq_handle = cmd.srq_handle;
1541 cmd_ex.max_send_wr = cmd.max_send_wr;
1542 cmd_ex.max_recv_wr = cmd.max_recv_wr;
1543 cmd_ex.max_send_sge = cmd.max_send_sge;
1544 cmd_ex.max_recv_sge = cmd.max_recv_sge;
1545 cmd_ex.max_inline_data = cmd.max_inline_data;
1546 cmd_ex.sq_sig_all = cmd.sq_sig_all;
1547 cmd_ex.qp_type = cmd.qp_type;
1548 cmd_ex.is_srq = cmd.is_srq;
1549
1550 return create_qp(attrs, &cmd_ex);
1551 }
1552
1553 static int ib_uverbs_ex_create_qp(struct uverbs_attr_bundle *attrs)
1554 {
1555 struct ib_uverbs_ex_create_qp cmd;
1556 int ret;
1557
1558 ret = uverbs_request(attrs, &cmd, sizeof(cmd));
1559 if (ret)
1560 return ret;
1561
1562 if (cmd.comp_mask & ~IB_UVERBS_CREATE_QP_SUP_COMP_MASK)
1563 return -EINVAL;
1564
1565 if (cmd.reserved)
1566 return -EINVAL;
1567
1568 return create_qp(attrs, &cmd);
1569 }
1570
1571 static int ib_uverbs_open_qp(struct uverbs_attr_bundle *attrs)
1572 {
1573 struct ib_uverbs_open_qp cmd;
1574 struct ib_uverbs_create_qp_resp resp;
1575 struct ib_uqp_object *obj;
1576 struct ib_xrcd *xrcd;
1577 struct ib_uobject *uninitialized_var(xrcd_uobj);
1578 struct ib_qp *qp;
1579 struct ib_qp_open_attr attr = {};
1580 int ret;
1581 struct ib_device *ib_dev;
1582
1583 ret = uverbs_request(attrs, &cmd, sizeof(cmd));
1584 if (ret)
1585 return ret;
1586
1587 obj = (struct ib_uqp_object *)uobj_alloc(UVERBS_OBJECT_QP, attrs,
1588 &ib_dev);
1589 if (IS_ERR(obj))
1590 return PTR_ERR(obj);
1591
1592 xrcd_uobj = uobj_get_read(UVERBS_OBJECT_XRCD, cmd.pd_handle, attrs);
1593 if (IS_ERR(xrcd_uobj)) {
1594 ret = -EINVAL;
1595 goto err_put;
1596 }
1597
1598 xrcd = (struct ib_xrcd *)xrcd_uobj->object;
1599 if (!xrcd) {
1600 ret = -EINVAL;
1601 goto err_xrcd;
1602 }
1603
1604 attr.event_handler = ib_uverbs_qp_event_handler;
1605 attr.qp_num = cmd.qpn;
1606 attr.qp_type = cmd.qp_type;
1607
1608 INIT_LIST_HEAD(&obj->uevent.event_list);
1609 INIT_LIST_HEAD(&obj->mcast_list);
1610
1611 qp = ib_open_qp(xrcd, &attr);
1612 if (IS_ERR(qp)) {
1613 ret = PTR_ERR(qp);
1614 goto err_xrcd;
1615 }
1616
1617 obj->uevent.uobject.object = qp;
1618 obj->uevent.uobject.user_handle = cmd.user_handle;
1619
1620 memset(&resp, 0, sizeof resp);
1621 resp.qpn = qp->qp_num;
1622 resp.qp_handle = obj->uevent.uobject.id;
1623
1624 ret = uverbs_response(attrs, &resp, sizeof(resp));
1625 if (ret)
1626 goto err_destroy;
1627
1628 obj->uxrcd = container_of(xrcd_uobj, struct ib_uxrcd_object, uobject);
1629 atomic_inc(&obj->uxrcd->refcnt);
1630 qp->uobject = obj;
1631 uobj_put_read(xrcd_uobj);
1632
1633 rdma_alloc_commit_uobject(&obj->uevent.uobject, attrs);
1634 return 0;
1635
1636 err_destroy:
1637 ib_destroy_qp_user(qp, uverbs_get_cleared_udata(attrs));
1638 err_xrcd:
1639 uobj_put_read(xrcd_uobj);
1640 err_put:
1641 uobj_alloc_abort(&obj->uevent.uobject, attrs);
1642 return ret;
1643 }
1644
1645 static void copy_ah_attr_to_uverbs(struct ib_uverbs_qp_dest *uverb_attr,
1646 struct rdma_ah_attr *rdma_attr)
1647 {
1648 const struct ib_global_route *grh;
1649
1650 uverb_attr->dlid = rdma_ah_get_dlid(rdma_attr);
1651 uverb_attr->sl = rdma_ah_get_sl(rdma_attr);
1652 uverb_attr->src_path_bits = rdma_ah_get_path_bits(rdma_attr);
1653 uverb_attr->static_rate = rdma_ah_get_static_rate(rdma_attr);
1654 uverb_attr->is_global = !!(rdma_ah_get_ah_flags(rdma_attr) &
1655 IB_AH_GRH);
1656 if (uverb_attr->is_global) {
1657 grh = rdma_ah_read_grh(rdma_attr);
1658 memcpy(uverb_attr->dgid, grh->dgid.raw, 16);
1659 uverb_attr->flow_label = grh->flow_label;
1660 uverb_attr->sgid_index = grh->sgid_index;
1661 uverb_attr->hop_limit = grh->hop_limit;
1662 uverb_attr->traffic_class = grh->traffic_class;
1663 }
1664 uverb_attr->port_num = rdma_ah_get_port_num(rdma_attr);
1665 }
1666
1667 static int ib_uverbs_query_qp(struct uverbs_attr_bundle *attrs)
1668 {
1669 struct ib_uverbs_query_qp cmd;
1670 struct ib_uverbs_query_qp_resp resp;
1671 struct ib_qp *qp;
1672 struct ib_qp_attr *attr;
1673 struct ib_qp_init_attr *init_attr;
1674 int ret;
1675
1676 ret = uverbs_request(attrs, &cmd, sizeof(cmd));
1677 if (ret)
1678 return ret;
1679
1680 attr = kmalloc(sizeof *attr, GFP_KERNEL);
1681 init_attr = kmalloc(sizeof *init_attr, GFP_KERNEL);
1682 if (!attr || !init_attr) {
1683 ret = -ENOMEM;
1684 goto out;
1685 }
1686
1687 qp = uobj_get_obj_read(qp, UVERBS_OBJECT_QP, cmd.qp_handle, attrs);
1688 if (!qp) {
1689 ret = -EINVAL;
1690 goto out;
1691 }
1692
1693 ret = ib_query_qp(qp, attr, cmd.attr_mask, init_attr);
1694
1695 rdma_lookup_put_uobject(&qp->uobject->uevent.uobject,
1696 UVERBS_LOOKUP_READ);
1697
1698 if (ret)
1699 goto out;
1700
1701 memset(&resp, 0, sizeof resp);
1702
1703 resp.qp_state = attr->qp_state;
1704 resp.cur_qp_state = attr->cur_qp_state;
1705 resp.path_mtu = attr->path_mtu;
1706 resp.path_mig_state = attr->path_mig_state;
1707 resp.qkey = attr->qkey;
1708 resp.rq_psn = attr->rq_psn;
1709 resp.sq_psn = attr->sq_psn;
1710 resp.dest_qp_num = attr->dest_qp_num;
1711 resp.qp_access_flags = attr->qp_access_flags;
1712 resp.pkey_index = attr->pkey_index;
1713 resp.alt_pkey_index = attr->alt_pkey_index;
1714 resp.sq_draining = attr->sq_draining;
1715 resp.max_rd_atomic = attr->max_rd_atomic;
1716 resp.max_dest_rd_atomic = attr->max_dest_rd_atomic;
1717 resp.min_rnr_timer = attr->min_rnr_timer;
1718 resp.port_num = attr->port_num;
1719 resp.timeout = attr->timeout;
1720 resp.retry_cnt = attr->retry_cnt;
1721 resp.rnr_retry = attr->rnr_retry;
1722 resp.alt_port_num = attr->alt_port_num;
1723 resp.alt_timeout = attr->alt_timeout;
1724
1725 copy_ah_attr_to_uverbs(&resp.dest, &attr->ah_attr);
1726 copy_ah_attr_to_uverbs(&resp.alt_dest, &attr->alt_ah_attr);
1727
1728 resp.max_send_wr = init_attr->cap.max_send_wr;
1729 resp.max_recv_wr = init_attr->cap.max_recv_wr;
1730 resp.max_send_sge = init_attr->cap.max_send_sge;
1731 resp.max_recv_sge = init_attr->cap.max_recv_sge;
1732 resp.max_inline_data = init_attr->cap.max_inline_data;
1733 resp.sq_sig_all = init_attr->sq_sig_type == IB_SIGNAL_ALL_WR;
1734
1735 ret = uverbs_response(attrs, &resp, sizeof(resp));
1736
1737 out:
1738 kfree(attr);
1739 kfree(init_attr);
1740
1741 return ret;
1742 }
1743
1744 /* Remove ignored fields set in the attribute mask */
1745 static int modify_qp_mask(enum ib_qp_type qp_type, int mask)
1746 {
1747 switch (qp_type) {
1748 case IB_QPT_XRC_INI:
1749 return mask & ~(IB_QP_MAX_DEST_RD_ATOMIC | IB_QP_MIN_RNR_TIMER);
1750 case IB_QPT_XRC_TGT:
1751 return mask & ~(IB_QP_MAX_QP_RD_ATOMIC | IB_QP_RETRY_CNT |
1752 IB_QP_RNR_RETRY);
1753 default:
1754 return mask;
1755 }
1756 }
1757
1758 static void copy_ah_attr_from_uverbs(struct ib_device *dev,
1759 struct rdma_ah_attr *rdma_attr,
1760 struct ib_uverbs_qp_dest *uverb_attr)
1761 {
1762 rdma_attr->type = rdma_ah_find_type(dev, uverb_attr->port_num);
1763 if (uverb_attr->is_global) {
1764 rdma_ah_set_grh(rdma_attr, NULL,
1765 uverb_attr->flow_label,
1766 uverb_attr->sgid_index,
1767 uverb_attr->hop_limit,
1768 uverb_attr->traffic_class);
1769 rdma_ah_set_dgid_raw(rdma_attr, uverb_attr->dgid);
1770 } else {
1771 rdma_ah_set_ah_flags(rdma_attr, 0);
1772 }
1773 rdma_ah_set_dlid(rdma_attr, uverb_attr->dlid);
1774 rdma_ah_set_sl(rdma_attr, uverb_attr->sl);
1775 rdma_ah_set_path_bits(rdma_attr, uverb_attr->src_path_bits);
1776 rdma_ah_set_static_rate(rdma_attr, uverb_attr->static_rate);
1777 rdma_ah_set_port_num(rdma_attr, uverb_attr->port_num);
1778 rdma_ah_set_make_grd(rdma_attr, false);
1779 }
1780
1781 static int modify_qp(struct uverbs_attr_bundle *attrs,
1782 struct ib_uverbs_ex_modify_qp *cmd)
1783 {
1784 struct ib_qp_attr *attr;
1785 struct ib_qp *qp;
1786 int ret;
1787
1788 attr = kzalloc(sizeof(*attr), GFP_KERNEL);
1789 if (!attr)
1790 return -ENOMEM;
1791
1792 qp = uobj_get_obj_read(qp, UVERBS_OBJECT_QP, cmd->base.qp_handle,
1793 attrs);
1794 if (!qp) {
1795 ret = -EINVAL;
1796 goto out;
1797 }
1798
1799 if ((cmd->base.attr_mask & IB_QP_PORT) &&
1800 !rdma_is_port_valid(qp->device, cmd->base.port_num)) {
1801 ret = -EINVAL;
1802 goto release_qp;
1803 }
1804
1805 if ((cmd->base.attr_mask & IB_QP_AV)) {
1806 if (!rdma_is_port_valid(qp->device, cmd->base.dest.port_num)) {
1807 ret = -EINVAL;
1808 goto release_qp;
1809 }
1810
1811 if (cmd->base.attr_mask & IB_QP_STATE &&
1812 cmd->base.qp_state == IB_QPS_RTR) {
1813 /* We are in INIT->RTR TRANSITION (if we are not,
1814 * this transition will be rejected in subsequent checks).
1815 * In the INIT->RTR transition, we cannot have IB_QP_PORT set,
1816 * but the IB_QP_STATE flag is required.
1817 *
1818 * Since kernel 3.14 (commit dbf727de7440), the uverbs driver,
1819 * when IB_QP_AV is set, has required inclusion of a valid
1820 * port number in the primary AV. (AVs are created and handled
1821 * differently for infiniband and ethernet (RoCE) ports).
1822 *
1823 * Check the port number included in the primary AV against
1824 * the port number in the qp struct, which was set (and saved)
1825 * in the RST->INIT transition.
1826 */
1827 if (cmd->base.dest.port_num != qp->real_qp->port) {
1828 ret = -EINVAL;
1829 goto release_qp;
1830 }
1831 } else {
1832 /* We are in SQD->SQD. (If we are not, this transition will
1833 * be rejected later in the verbs layer checks).
1834 * Check for both IB_QP_PORT and IB_QP_AV, these can be set
1835 * together in the SQD->SQD transition.
1836 *
1837 * If only IP_QP_AV was set, add in IB_QP_PORT as well (the
1838 * verbs layer driver does not track primary port changes
1839 * resulting from path migration. Thus, in SQD, if the primary
1840 * AV is modified, the primary port should also be modified).
1841 *
1842 * Note that in this transition, the IB_QP_STATE flag
1843 * is not allowed.
1844 */
1845 if (((cmd->base.attr_mask & (IB_QP_AV | IB_QP_PORT))
1846 == (IB_QP_AV | IB_QP_PORT)) &&
1847 cmd->base.port_num != cmd->base.dest.port_num) {
1848 ret = -EINVAL;
1849 goto release_qp;
1850 }
1851 if ((cmd->base.attr_mask & (IB_QP_AV | IB_QP_PORT))
1852 == IB_QP_AV) {
1853 cmd->base.attr_mask |= IB_QP_PORT;
1854 cmd->base.port_num = cmd->base.dest.port_num;
1855 }
1856 }
1857 }
1858
1859 if ((cmd->base.attr_mask & IB_QP_ALT_PATH) &&
1860 (!rdma_is_port_valid(qp->device, cmd->base.alt_port_num) ||
1861 !rdma_is_port_valid(qp->device, cmd->base.alt_dest.port_num) ||
1862 cmd->base.alt_port_num != cmd->base.alt_dest.port_num)) {
1863 ret = -EINVAL;
1864 goto release_qp;
1865 }
1866
1867 if ((cmd->base.attr_mask & IB_QP_CUR_STATE &&
1868 cmd->base.cur_qp_state > IB_QPS_ERR) ||
1869 (cmd->base.attr_mask & IB_QP_STATE &&
1870 cmd->base.qp_state > IB_QPS_ERR)) {
1871 ret = -EINVAL;
1872 goto release_qp;
1873 }
1874
1875 if (cmd->base.attr_mask & IB_QP_STATE)
1876 attr->qp_state = cmd->base.qp_state;
1877 if (cmd->base.attr_mask & IB_QP_CUR_STATE)
1878 attr->cur_qp_state = cmd->base.cur_qp_state;
1879 if (cmd->base.attr_mask & IB_QP_PATH_MTU)
1880 attr->path_mtu = cmd->base.path_mtu;
1881 if (cmd->base.attr_mask & IB_QP_PATH_MIG_STATE)
1882 attr->path_mig_state = cmd->base.path_mig_state;
1883 if (cmd->base.attr_mask & IB_QP_QKEY)
1884 attr->qkey = cmd->base.qkey;
1885 if (cmd->base.attr_mask & IB_QP_RQ_PSN)
1886 attr->rq_psn = cmd->base.rq_psn;
1887 if (cmd->base.attr_mask & IB_QP_SQ_PSN)
1888 attr->sq_psn = cmd->base.sq_psn;
1889 if (cmd->base.attr_mask & IB_QP_DEST_QPN)
1890 attr->dest_qp_num = cmd->base.dest_qp_num;
1891 if (cmd->base.attr_mask & IB_QP_ACCESS_FLAGS)
1892 attr->qp_access_flags = cmd->base.qp_access_flags;
1893 if (cmd->base.attr_mask & IB_QP_PKEY_INDEX)
1894 attr->pkey_index = cmd->base.pkey_index;
1895 if (cmd->base.attr_mask & IB_QP_EN_SQD_ASYNC_NOTIFY)
1896 attr->en_sqd_async_notify = cmd->base.en_sqd_async_notify;
1897 if (cmd->base.attr_mask & IB_QP_MAX_QP_RD_ATOMIC)
1898 attr->max_rd_atomic = cmd->base.max_rd_atomic;
1899 if (cmd->base.attr_mask & IB_QP_MAX_DEST_RD_ATOMIC)
1900 attr->max_dest_rd_atomic = cmd->base.max_dest_rd_atomic;
1901 if (cmd->base.attr_mask & IB_QP_MIN_RNR_TIMER)
1902 attr->min_rnr_timer = cmd->base.min_rnr_timer;
1903 if (cmd->base.attr_mask & IB_QP_PORT)
1904 attr->port_num = cmd->base.port_num;
1905 if (cmd->base.attr_mask & IB_QP_TIMEOUT)
1906 attr->timeout = cmd->base.timeout;
1907 if (cmd->base.attr_mask & IB_QP_RETRY_CNT)
1908 attr->retry_cnt = cmd->base.retry_cnt;
1909 if (cmd->base.attr_mask & IB_QP_RNR_RETRY)
1910 attr->rnr_retry = cmd->base.rnr_retry;
1911 if (cmd->base.attr_mask & IB_QP_ALT_PATH) {
1912 attr->alt_port_num = cmd->base.alt_port_num;
1913 attr->alt_timeout = cmd->base.alt_timeout;
1914 attr->alt_pkey_index = cmd->base.alt_pkey_index;
1915 }
1916 if (cmd->base.attr_mask & IB_QP_RATE_LIMIT)
1917 attr->rate_limit = cmd->rate_limit;
1918
1919 if (cmd->base.attr_mask & IB_QP_AV)
1920 copy_ah_attr_from_uverbs(qp->device, &attr->ah_attr,
1921 &cmd->base.dest);
1922
1923 if (cmd->base.attr_mask & IB_QP_ALT_PATH)
1924 copy_ah_attr_from_uverbs(qp->device, &attr->alt_ah_attr,
1925 &cmd->base.alt_dest);
1926
1927 ret = ib_modify_qp_with_udata(qp, attr,
1928 modify_qp_mask(qp->qp_type,
1929 cmd->base.attr_mask),
1930 &attrs->driver_udata);
1931
1932 release_qp:
1933 rdma_lookup_put_uobject(&qp->uobject->uevent.uobject,
1934 UVERBS_LOOKUP_READ);
1935 out:
1936 kfree(attr);
1937
1938 return ret;
1939 }
1940
1941 static int ib_uverbs_modify_qp(struct uverbs_attr_bundle *attrs)
1942 {
1943 struct ib_uverbs_ex_modify_qp cmd;
1944 int ret;
1945
1946 ret = uverbs_request(attrs, &cmd.base, sizeof(cmd.base));
1947 if (ret)
1948 return ret;
1949
1950 if (cmd.base.attr_mask &
1951 ~((IB_USER_LEGACY_LAST_QP_ATTR_MASK << 1) - 1))
1952 return -EOPNOTSUPP;
1953
1954 return modify_qp(attrs, &cmd);
1955 }
1956
1957 static int ib_uverbs_ex_modify_qp(struct uverbs_attr_bundle *attrs)
1958 {
1959 struct ib_uverbs_ex_modify_qp cmd;
1960 struct ib_uverbs_ex_modify_qp_resp resp = {
1961 .response_length = uverbs_response_length(attrs, sizeof(resp))
1962 };
1963 int ret;
1964
1965 ret = uverbs_request(attrs, &cmd, sizeof(cmd));
1966 if (ret)
1967 return ret;
1968
1969 /*
1970 * Last bit is reserved for extending the attr_mask by
1971 * using another field.
1972 */
1973 BUILD_BUG_ON(IB_USER_LAST_QP_ATTR_MASK == (1 << 31));
1974
1975 if (cmd.base.attr_mask &
1976 ~((IB_USER_LAST_QP_ATTR_MASK << 1) - 1))
1977 return -EOPNOTSUPP;
1978
1979 ret = modify_qp(attrs, &cmd);
1980 if (ret)
1981 return ret;
1982
1983 return uverbs_response(attrs, &resp, sizeof(resp));
1984 }
1985
1986 static int ib_uverbs_destroy_qp(struct uverbs_attr_bundle *attrs)
1987 {
1988 struct ib_uverbs_destroy_qp cmd;
1989 struct ib_uverbs_destroy_qp_resp resp;
1990 struct ib_uobject *uobj;
1991 struct ib_uqp_object *obj;
1992 int ret;
1993
1994 ret = uverbs_request(attrs, &cmd, sizeof(cmd));
1995 if (ret)
1996 return ret;
1997
1998 uobj = uobj_get_destroy(UVERBS_OBJECT_QP, cmd.qp_handle, attrs);
1999 if (IS_ERR(uobj))
2000 return PTR_ERR(uobj);
2001
2002 obj = container_of(uobj, struct ib_uqp_object, uevent.uobject);
2003 memset(&resp, 0, sizeof(resp));
2004 resp.events_reported = obj->uevent.events_reported;
2005
2006 uobj_put_destroy(uobj);
2007
2008 return uverbs_response(attrs, &resp, sizeof(resp));
2009 }
2010
2011 static void *alloc_wr(size_t wr_size, __u32 num_sge)
2012 {
2013 if (num_sge >= (U32_MAX - ALIGN(wr_size, sizeof (struct ib_sge))) /
2014 sizeof (struct ib_sge))
2015 return NULL;
2016
2017 return kmalloc(ALIGN(wr_size, sizeof (struct ib_sge)) +
2018 num_sge * sizeof (struct ib_sge), GFP_KERNEL);
2019 }
2020
2021 static int ib_uverbs_post_send(struct uverbs_attr_bundle *attrs)
2022 {
2023 struct ib_uverbs_post_send cmd;
2024 struct ib_uverbs_post_send_resp resp;
2025 struct ib_uverbs_send_wr *user_wr;
2026 struct ib_send_wr *wr = NULL, *last, *next;
2027 const struct ib_send_wr *bad_wr;
2028 struct ib_qp *qp;
2029 int i, sg_ind;
2030 int is_ud;
2031 int ret, ret2;
2032 size_t next_size;
2033 const struct ib_sge __user *sgls;
2034 const void __user *wqes;
2035 struct uverbs_req_iter iter;
2036
2037 ret = uverbs_request_start(attrs, &iter, &cmd, sizeof(cmd));
2038 if (ret)
2039 return ret;
2040 wqes = uverbs_request_next_ptr(&iter, cmd.wqe_size * cmd.wr_count);
2041 if (IS_ERR(wqes))
2042 return PTR_ERR(wqes);
2043 sgls = uverbs_request_next_ptr(
2044 &iter, cmd.sge_count * sizeof(struct ib_uverbs_sge));
2045 if (IS_ERR(sgls))
2046 return PTR_ERR(sgls);
2047 ret = uverbs_request_finish(&iter);
2048 if (ret)
2049 return ret;
2050
2051 user_wr = kmalloc(cmd.wqe_size, GFP_KERNEL);
2052 if (!user_wr)
2053 return -ENOMEM;
2054
2055 qp = uobj_get_obj_read(qp, UVERBS_OBJECT_QP, cmd.qp_handle, attrs);
2056 if (!qp) {
2057 ret = -EINVAL;
2058 goto out;
2059 }
2060
2061 is_ud = qp->qp_type == IB_QPT_UD;
2062 sg_ind = 0;
2063 last = NULL;
2064 for (i = 0; i < cmd.wr_count; ++i) {
2065 if (copy_from_user(user_wr, wqes + i * cmd.wqe_size,
2066 cmd.wqe_size)) {
2067 ret = -EFAULT;
2068 goto out_put;
2069 }
2070
2071 if (user_wr->num_sge + sg_ind > cmd.sge_count) {
2072 ret = -EINVAL;
2073 goto out_put;
2074 }
2075
2076 if (is_ud) {
2077 struct ib_ud_wr *ud;
2078
2079 if (user_wr->opcode != IB_WR_SEND &&
2080 user_wr->opcode != IB_WR_SEND_WITH_IMM) {
2081 ret = -EINVAL;
2082 goto out_put;
2083 }
2084
2085 next_size = sizeof(*ud);
2086 ud = alloc_wr(next_size, user_wr->num_sge);
2087 if (!ud) {
2088 ret = -ENOMEM;
2089 goto out_put;
2090 }
2091
2092 ud->ah = uobj_get_obj_read(ah, UVERBS_OBJECT_AH,
2093 user_wr->wr.ud.ah, attrs);
2094 if (!ud->ah) {
2095 kfree(ud);
2096 ret = -EINVAL;
2097 goto out_put;
2098 }
2099 ud->remote_qpn = user_wr->wr.ud.remote_qpn;
2100 ud->remote_qkey = user_wr->wr.ud.remote_qkey;
2101
2102 next = &ud->wr;
2103 } else if (user_wr->opcode == IB_WR_RDMA_WRITE_WITH_IMM ||
2104 user_wr->opcode == IB_WR_RDMA_WRITE ||
2105 user_wr->opcode == IB_WR_RDMA_READ) {
2106 struct ib_rdma_wr *rdma;
2107
2108 next_size = sizeof(*rdma);
2109 rdma = alloc_wr(next_size, user_wr->num_sge);
2110 if (!rdma) {
2111 ret = -ENOMEM;
2112 goto out_put;
2113 }
2114
2115 rdma->remote_addr = user_wr->wr.rdma.remote_addr;
2116 rdma->rkey = user_wr->wr.rdma.rkey;
2117
2118 next = &rdma->wr;
2119 } else if (user_wr->opcode == IB_WR_ATOMIC_CMP_AND_SWP ||
2120 user_wr->opcode == IB_WR_ATOMIC_FETCH_AND_ADD) {
2121 struct ib_atomic_wr *atomic;
2122
2123 next_size = sizeof(*atomic);
2124 atomic = alloc_wr(next_size, user_wr->num_sge);
2125 if (!atomic) {
2126 ret = -ENOMEM;
2127 goto out_put;
2128 }
2129
2130 atomic->remote_addr = user_wr->wr.atomic.remote_addr;
2131 atomic->compare_add = user_wr->wr.atomic.compare_add;
2132 atomic->swap = user_wr->wr.atomic.swap;
2133 atomic->rkey = user_wr->wr.atomic.rkey;
2134
2135 next = &atomic->wr;
2136 } else if (user_wr->opcode == IB_WR_SEND ||
2137 user_wr->opcode == IB_WR_SEND_WITH_IMM ||
2138 user_wr->opcode == IB_WR_SEND_WITH_INV) {
2139 next_size = sizeof(*next);
2140 next = alloc_wr(next_size, user_wr->num_sge);
2141 if (!next) {
2142 ret = -ENOMEM;
2143 goto out_put;
2144 }
2145 } else {
2146 ret = -EINVAL;
2147 goto out_put;
2148 }
2149
2150 if (user_wr->opcode == IB_WR_SEND_WITH_IMM ||
2151 user_wr->opcode == IB_WR_RDMA_WRITE_WITH_IMM) {
2152 next->ex.imm_data =
2153 (__be32 __force) user_wr->ex.imm_data;
2154 } else if (user_wr->opcode == IB_WR_SEND_WITH_INV) {
2155 next->ex.invalidate_rkey = user_wr->ex.invalidate_rkey;
2156 }
2157
2158 if (!last)
2159 wr = next;
2160 else
2161 last->next = next;
2162 last = next;
2163
2164 next->next = NULL;
2165 next->wr_id = user_wr->wr_id;
2166 next->num_sge = user_wr->num_sge;
2167 next->opcode = user_wr->opcode;
2168 next->send_flags = user_wr->send_flags;
2169
2170 if (next->num_sge) {
2171 next->sg_list = (void *) next +
2172 ALIGN(next_size, sizeof(struct ib_sge));
2173 if (copy_from_user(next->sg_list, sgls + sg_ind,
2174 next->num_sge *
2175 sizeof(struct ib_sge))) {
2176 ret = -EFAULT;
2177 goto out_put;
2178 }
2179 sg_ind += next->num_sge;
2180 } else
2181 next->sg_list = NULL;
2182 }
2183
2184 resp.bad_wr = 0;
2185 ret = qp->device->ops.post_send(qp->real_qp, wr, &bad_wr);
2186 if (ret)
2187 for (next = wr; next; next = next->next) {
2188 ++resp.bad_wr;
2189 if (next == bad_wr)
2190 break;
2191 }
2192
2193 ret2 = uverbs_response(attrs, &resp, sizeof(resp));
2194 if (ret2)
2195 ret = ret2;
2196
2197 out_put:
2198 rdma_lookup_put_uobject(&qp->uobject->uevent.uobject,
2199 UVERBS_LOOKUP_READ);
2200
2201 while (wr) {
2202 if (is_ud && ud_wr(wr)->ah)
2203 uobj_put_obj_read(ud_wr(wr)->ah);
2204 next = wr->next;
2205 kfree(wr);
2206 wr = next;
2207 }
2208
2209 out:
2210 kfree(user_wr);
2211
2212 return ret;
2213 }
2214
2215 static struct ib_recv_wr *
2216 ib_uverbs_unmarshall_recv(struct uverbs_req_iter *iter, u32 wr_count,
2217 u32 wqe_size, u32 sge_count)
2218 {
2219 struct ib_uverbs_recv_wr *user_wr;
2220 struct ib_recv_wr *wr = NULL, *last, *next;
2221 int sg_ind;
2222 int i;
2223 int ret;
2224 const struct ib_sge __user *sgls;
2225 const void __user *wqes;
2226
2227 if (wqe_size < sizeof (struct ib_uverbs_recv_wr))
2228 return ERR_PTR(-EINVAL);
2229
2230 wqes = uverbs_request_next_ptr(iter, wqe_size * wr_count);
2231 if (IS_ERR(wqes))
2232 return ERR_CAST(wqes);
2233 sgls = uverbs_request_next_ptr(
2234 iter, sge_count * sizeof(struct ib_uverbs_sge));
2235 if (IS_ERR(sgls))
2236 return ERR_CAST(sgls);
2237 ret = uverbs_request_finish(iter);
2238 if (ret)
2239 return ERR_PTR(ret);
2240
2241 user_wr = kmalloc(wqe_size, GFP_KERNEL);
2242 if (!user_wr)
2243 return ERR_PTR(-ENOMEM);
2244
2245 sg_ind = 0;
2246 last = NULL;
2247 for (i = 0; i < wr_count; ++i) {
2248 if (copy_from_user(user_wr, wqes + i * wqe_size,
2249 wqe_size)) {
2250 ret = -EFAULT;
2251 goto err;
2252 }
2253
2254 if (user_wr->num_sge + sg_ind > sge_count) {
2255 ret = -EINVAL;
2256 goto err;
2257 }
2258
2259 if (user_wr->num_sge >=
2260 (U32_MAX - ALIGN(sizeof *next, sizeof (struct ib_sge))) /
2261 sizeof (struct ib_sge)) {
2262 ret = -EINVAL;
2263 goto err;
2264 }
2265
2266 next = kmalloc(ALIGN(sizeof *next, sizeof (struct ib_sge)) +
2267 user_wr->num_sge * sizeof (struct ib_sge),
2268 GFP_KERNEL);
2269 if (!next) {
2270 ret = -ENOMEM;
2271 goto err;
2272 }
2273
2274 if (!last)
2275 wr = next;
2276 else
2277 last->next = next;
2278 last = next;
2279
2280 next->next = NULL;
2281 next->wr_id = user_wr->wr_id;
2282 next->num_sge = user_wr->num_sge;
2283
2284 if (next->num_sge) {
2285 next->sg_list = (void *) next +
2286 ALIGN(sizeof *next, sizeof (struct ib_sge));
2287 if (copy_from_user(next->sg_list, sgls + sg_ind,
2288 next->num_sge *
2289 sizeof(struct ib_sge))) {
2290 ret = -EFAULT;
2291 goto err;
2292 }
2293 sg_ind += next->num_sge;
2294 } else
2295 next->sg_list = NULL;
2296 }
2297
2298 kfree(user_wr);
2299 return wr;
2300
2301 err:
2302 kfree(user_wr);
2303
2304 while (wr) {
2305 next = wr->next;
2306 kfree(wr);
2307 wr = next;
2308 }
2309
2310 return ERR_PTR(ret);
2311 }
2312
2313 static int ib_uverbs_post_recv(struct uverbs_attr_bundle *attrs)
2314 {
2315 struct ib_uverbs_post_recv cmd;
2316 struct ib_uverbs_post_recv_resp resp;
2317 struct ib_recv_wr *wr, *next;
2318 const struct ib_recv_wr *bad_wr;
2319 struct ib_qp *qp;
2320 int ret, ret2;
2321 struct uverbs_req_iter iter;
2322
2323 ret = uverbs_request_start(attrs, &iter, &cmd, sizeof(cmd));
2324 if (ret)
2325 return ret;
2326
2327 wr = ib_uverbs_unmarshall_recv(&iter, cmd.wr_count, cmd.wqe_size,
2328 cmd.sge_count);
2329 if (IS_ERR(wr))
2330 return PTR_ERR(wr);
2331
2332 qp = uobj_get_obj_read(qp, UVERBS_OBJECT_QP, cmd.qp_handle, attrs);
2333 if (!qp) {
2334 ret = -EINVAL;
2335 goto out;
2336 }
2337
2338 resp.bad_wr = 0;
2339 ret = qp->device->ops.post_recv(qp->real_qp, wr, &bad_wr);
2340
2341 rdma_lookup_put_uobject(&qp->uobject->uevent.uobject,
2342 UVERBS_LOOKUP_READ);
2343 if (ret) {
2344 for (next = wr; next; next = next->next) {
2345 ++resp.bad_wr;
2346 if (next == bad_wr)
2347 break;
2348 }
2349 }
2350
2351 ret2 = uverbs_response(attrs, &resp, sizeof(resp));
2352 if (ret2)
2353 ret = ret2;
2354 out:
2355 while (wr) {
2356 next = wr->next;
2357 kfree(wr);
2358 wr = next;
2359 }
2360
2361 return ret;
2362 }
2363
2364 static int ib_uverbs_post_srq_recv(struct uverbs_attr_bundle *attrs)
2365 {
2366 struct ib_uverbs_post_srq_recv cmd;
2367 struct ib_uverbs_post_srq_recv_resp resp;
2368 struct ib_recv_wr *wr, *next;
2369 const struct ib_recv_wr *bad_wr;
2370 struct ib_srq *srq;
2371 int ret, ret2;
2372 struct uverbs_req_iter iter;
2373
2374 ret = uverbs_request_start(attrs, &iter, &cmd, sizeof(cmd));
2375 if (ret)
2376 return ret;
2377
2378 wr = ib_uverbs_unmarshall_recv(&iter, cmd.wr_count, cmd.wqe_size,
2379 cmd.sge_count);
2380 if (IS_ERR(wr))
2381 return PTR_ERR(wr);
2382
2383 srq = uobj_get_obj_read(srq, UVERBS_OBJECT_SRQ, cmd.srq_handle, attrs);
2384 if (!srq) {
2385 ret = -EINVAL;
2386 goto out;
2387 }
2388
2389 resp.bad_wr = 0;
2390 ret = srq->device->ops.post_srq_recv(srq, wr, &bad_wr);
2391
2392 rdma_lookup_put_uobject(&srq->uobject->uevent.uobject,
2393 UVERBS_LOOKUP_READ);
2394
2395 if (ret)
2396 for (next = wr; next; next = next->next) {
2397 ++resp.bad_wr;
2398 if (next == bad_wr)
2399 break;
2400 }
2401
2402 ret2 = uverbs_response(attrs, &resp, sizeof(resp));
2403 if (ret2)
2404 ret = ret2;
2405
2406 out:
2407 while (wr) {
2408 next = wr->next;
2409 kfree(wr);
2410 wr = next;
2411 }
2412
2413 return ret;
2414 }
2415
2416 static int ib_uverbs_create_ah(struct uverbs_attr_bundle *attrs)
2417 {
2418 struct ib_uverbs_create_ah cmd;
2419 struct ib_uverbs_create_ah_resp resp;
2420 struct ib_uobject *uobj;
2421 struct ib_pd *pd;
2422 struct ib_ah *ah;
2423 struct rdma_ah_attr attr = {};
2424 int ret;
2425 struct ib_device *ib_dev;
2426
2427 ret = uverbs_request(attrs, &cmd, sizeof(cmd));
2428 if (ret)
2429 return ret;
2430
2431 uobj = uobj_alloc(UVERBS_OBJECT_AH, attrs, &ib_dev);
2432 if (IS_ERR(uobj))
2433 return PTR_ERR(uobj);
2434
2435 if (!rdma_is_port_valid(ib_dev, cmd.attr.port_num)) {
2436 ret = -EINVAL;
2437 goto err;
2438 }
2439
2440 pd = uobj_get_obj_read(pd, UVERBS_OBJECT_PD, cmd.pd_handle, attrs);
2441 if (!pd) {
2442 ret = -EINVAL;
2443 goto err;
2444 }
2445
2446 attr.type = rdma_ah_find_type(ib_dev, cmd.attr.port_num);
2447 rdma_ah_set_make_grd(&attr, false);
2448 rdma_ah_set_dlid(&attr, cmd.attr.dlid);
2449 rdma_ah_set_sl(&attr, cmd.attr.sl);
2450 rdma_ah_set_path_bits(&attr, cmd.attr.src_path_bits);
2451 rdma_ah_set_static_rate(&attr, cmd.attr.static_rate);
2452 rdma_ah_set_port_num(&attr, cmd.attr.port_num);
2453
2454 if (cmd.attr.is_global) {
2455 rdma_ah_set_grh(&attr, NULL, cmd.attr.grh.flow_label,
2456 cmd.attr.grh.sgid_index,
2457 cmd.attr.grh.hop_limit,
2458 cmd.attr.grh.traffic_class);
2459 rdma_ah_set_dgid_raw(&attr, cmd.attr.grh.dgid);
2460 } else {
2461 rdma_ah_set_ah_flags(&attr, 0);
2462 }
2463
2464 ah = rdma_create_user_ah(pd, &attr, &attrs->driver_udata);
2465 if (IS_ERR(ah)) {
2466 ret = PTR_ERR(ah);
2467 goto err_put;
2468 }
2469
2470 ah->uobject = uobj;
2471 uobj->user_handle = cmd.user_handle;
2472 uobj->object = ah;
2473
2474 resp.ah_handle = uobj->id;
2475
2476 ret = uverbs_response(attrs, &resp, sizeof(resp));
2477 if (ret)
2478 goto err_copy;
2479
2480 uobj_put_obj_read(pd);
2481 rdma_alloc_commit_uobject(uobj, attrs);
2482 return 0;
2483
2484 err_copy:
2485 rdma_destroy_ah_user(ah, RDMA_DESTROY_AH_SLEEPABLE,
2486 uverbs_get_cleared_udata(attrs));
2487
2488 err_put:
2489 uobj_put_obj_read(pd);
2490
2491 err:
2492 uobj_alloc_abort(uobj, attrs);
2493 return ret;
2494 }
2495
2496 static int ib_uverbs_destroy_ah(struct uverbs_attr_bundle *attrs)
2497 {
2498 struct ib_uverbs_destroy_ah cmd;
2499 int ret;
2500
2501 ret = uverbs_request(attrs, &cmd, sizeof(cmd));
2502 if (ret)
2503 return ret;
2504
2505 return uobj_perform_destroy(UVERBS_OBJECT_AH, cmd.ah_handle, attrs);
2506 }
2507
2508 static int ib_uverbs_attach_mcast(struct uverbs_attr_bundle *attrs)
2509 {
2510 struct ib_uverbs_attach_mcast cmd;
2511 struct ib_qp *qp;
2512 struct ib_uqp_object *obj;
2513 struct ib_uverbs_mcast_entry *mcast;
2514 int ret;
2515
2516 ret = uverbs_request(attrs, &cmd, sizeof(cmd));
2517 if (ret)
2518 return ret;
2519
2520 qp = uobj_get_obj_read(qp, UVERBS_OBJECT_QP, cmd.qp_handle, attrs);
2521 if (!qp)
2522 return -EINVAL;
2523
2524 obj = qp->uobject;
2525
2526 mutex_lock(&obj->mcast_lock);
2527 list_for_each_entry(mcast, &obj->mcast_list, list)
2528 if (cmd.mlid == mcast->lid &&
2529 !memcmp(cmd.gid, mcast->gid.raw, sizeof mcast->gid.raw)) {
2530 ret = 0;
2531 goto out_put;
2532 }
2533
2534 mcast = kmalloc(sizeof *mcast, GFP_KERNEL);
2535 if (!mcast) {
2536 ret = -ENOMEM;
2537 goto out_put;
2538 }
2539
2540 mcast->lid = cmd.mlid;
2541 memcpy(mcast->gid.raw, cmd.gid, sizeof mcast->gid.raw);
2542
2543 ret = ib_attach_mcast(qp, &mcast->gid, cmd.mlid);
2544 if (!ret)
2545 list_add_tail(&mcast->list, &obj->mcast_list);
2546 else
2547 kfree(mcast);
2548
2549 out_put:
2550 mutex_unlock(&obj->mcast_lock);
2551 rdma_lookup_put_uobject(&qp->uobject->uevent.uobject,
2552 UVERBS_LOOKUP_READ);
2553
2554 return ret;
2555 }
2556
2557 static int ib_uverbs_detach_mcast(struct uverbs_attr_bundle *attrs)
2558 {
2559 struct ib_uverbs_detach_mcast cmd;
2560 struct ib_uqp_object *obj;
2561 struct ib_qp *qp;
2562 struct ib_uverbs_mcast_entry *mcast;
2563 int ret;
2564 bool found = false;
2565
2566 ret = uverbs_request(attrs, &cmd, sizeof(cmd));
2567 if (ret)
2568 return ret;
2569
2570 qp = uobj_get_obj_read(qp, UVERBS_OBJECT_QP, cmd.qp_handle, attrs);
2571 if (!qp)
2572 return -EINVAL;
2573
2574 obj = qp->uobject;
2575 mutex_lock(&obj->mcast_lock);
2576
2577 list_for_each_entry(mcast, &obj->mcast_list, list)
2578 if (cmd.mlid == mcast->lid &&
2579 !memcmp(cmd.gid, mcast->gid.raw, sizeof mcast->gid.raw)) {
2580 list_del(&mcast->list);
2581 kfree(mcast);
2582 found = true;
2583 break;
2584 }
2585
2586 if (!found) {
2587 ret = -EINVAL;
2588 goto out_put;
2589 }
2590
2591 ret = ib_detach_mcast(qp, (union ib_gid *)cmd.gid, cmd.mlid);
2592
2593 out_put:
2594 mutex_unlock(&obj->mcast_lock);
2595 rdma_lookup_put_uobject(&qp->uobject->uevent.uobject,
2596 UVERBS_LOOKUP_READ);
2597 return ret;
2598 }
2599
2600 struct ib_uflow_resources *flow_resources_alloc(size_t num_specs)
2601 {
2602 struct ib_uflow_resources *resources;
2603
2604 resources = kzalloc(sizeof(*resources), GFP_KERNEL);
2605
2606 if (!resources)
2607 return NULL;
2608
2609 if (!num_specs)
2610 goto out;
2611
2612 resources->counters =
2613 kcalloc(num_specs, sizeof(*resources->counters), GFP_KERNEL);
2614 resources->collection =
2615 kcalloc(num_specs, sizeof(*resources->collection), GFP_KERNEL);
2616
2617 if (!resources->counters || !resources->collection)
2618 goto err;
2619
2620 out:
2621 resources->max = num_specs;
2622 return resources;
2623
2624 err:
2625 kfree(resources->counters);
2626 kfree(resources);
2627
2628 return NULL;
2629 }
2630 EXPORT_SYMBOL(flow_resources_alloc);
2631
2632 void ib_uverbs_flow_resources_free(struct ib_uflow_resources *uflow_res)
2633 {
2634 unsigned int i;
2635
2636 if (!uflow_res)
2637 return;
2638
2639 for (i = 0; i < uflow_res->collection_num; i++)
2640 atomic_dec(&uflow_res->collection[i]->usecnt);
2641
2642 for (i = 0; i < uflow_res->counters_num; i++)
2643 atomic_dec(&uflow_res->counters[i]->usecnt);
2644
2645 kfree(uflow_res->collection);
2646 kfree(uflow_res->counters);
2647 kfree(uflow_res);
2648 }
2649 EXPORT_SYMBOL(ib_uverbs_flow_resources_free);
2650
2651 void flow_resources_add(struct ib_uflow_resources *uflow_res,
2652 enum ib_flow_spec_type type,
2653 void *ibobj)
2654 {
2655 WARN_ON(uflow_res->num >= uflow_res->max);
2656
2657 switch (type) {
2658 case IB_FLOW_SPEC_ACTION_HANDLE:
2659 atomic_inc(&((struct ib_flow_action *)ibobj)->usecnt);
2660 uflow_res->collection[uflow_res->collection_num++] =
2661 (struct ib_flow_action *)ibobj;
2662 break;
2663 case IB_FLOW_SPEC_ACTION_COUNT:
2664 atomic_inc(&((struct ib_counters *)ibobj)->usecnt);
2665 uflow_res->counters[uflow_res->counters_num++] =
2666 (struct ib_counters *)ibobj;
2667 break;
2668 default:
2669 WARN_ON(1);
2670 }
2671
2672 uflow_res->num++;
2673 }
2674 EXPORT_SYMBOL(flow_resources_add);
2675
2676 static int kern_spec_to_ib_spec_action(struct uverbs_attr_bundle *attrs,
2677 struct ib_uverbs_flow_spec *kern_spec,
2678 union ib_flow_spec *ib_spec,
2679 struct ib_uflow_resources *uflow_res)
2680 {
2681 ib_spec->type = kern_spec->type;
2682 switch (ib_spec->type) {
2683 case IB_FLOW_SPEC_ACTION_TAG:
2684 if (kern_spec->flow_tag.size !=
2685 sizeof(struct ib_uverbs_flow_spec_action_tag))
2686 return -EINVAL;
2687
2688 ib_spec->flow_tag.size = sizeof(struct ib_flow_spec_action_tag);
2689 ib_spec->flow_tag.tag_id = kern_spec->flow_tag.tag_id;
2690 break;
2691 case IB_FLOW_SPEC_ACTION_DROP:
2692 if (kern_spec->drop.size !=
2693 sizeof(struct ib_uverbs_flow_spec_action_drop))
2694 return -EINVAL;
2695
2696 ib_spec->drop.size = sizeof(struct ib_flow_spec_action_drop);
2697 break;
2698 case IB_FLOW_SPEC_ACTION_HANDLE:
2699 if (kern_spec->action.size !=
2700 sizeof(struct ib_uverbs_flow_spec_action_handle))
2701 return -EOPNOTSUPP;
2702 ib_spec->action.act = uobj_get_obj_read(flow_action,
2703 UVERBS_OBJECT_FLOW_ACTION,
2704 kern_spec->action.handle,
2705 attrs);
2706 if (!ib_spec->action.act)
2707 return -EINVAL;
2708 ib_spec->action.size =
2709 sizeof(struct ib_flow_spec_action_handle);
2710 flow_resources_add(uflow_res,
2711 IB_FLOW_SPEC_ACTION_HANDLE,
2712 ib_spec->action.act);
2713 uobj_put_obj_read(ib_spec->action.act);
2714 break;
2715 case IB_FLOW_SPEC_ACTION_COUNT:
2716 if (kern_spec->flow_count.size !=
2717 sizeof(struct ib_uverbs_flow_spec_action_count))
2718 return -EINVAL;
2719 ib_spec->flow_count.counters =
2720 uobj_get_obj_read(counters,
2721 UVERBS_OBJECT_COUNTERS,
2722 kern_spec->flow_count.handle,
2723 attrs);
2724 if (!ib_spec->flow_count.counters)
2725 return -EINVAL;
2726 ib_spec->flow_count.size =
2727 sizeof(struct ib_flow_spec_action_count);
2728 flow_resources_add(uflow_res,
2729 IB_FLOW_SPEC_ACTION_COUNT,
2730 ib_spec->flow_count.counters);
2731 uobj_put_obj_read(ib_spec->flow_count.counters);
2732 break;
2733 default:
2734 return -EINVAL;
2735 }
2736 return 0;
2737 }
2738
2739 static ssize_t spec_filter_size(const void *kern_spec_filter, u16 kern_filter_size,
2740 u16 ib_real_filter_sz)
2741 {
2742 /*
2743 * User space filter structures must be 64 bit aligned, otherwise this
2744 * may pass, but we won't handle additional new attributes.
2745 */
2746
2747 if (kern_filter_size > ib_real_filter_sz) {
2748 if (memchr_inv(kern_spec_filter +
2749 ib_real_filter_sz, 0,
2750 kern_filter_size - ib_real_filter_sz))
2751 return -EINVAL;
2752 return ib_real_filter_sz;
2753 }
2754 return kern_filter_size;
2755 }
2756
2757 int ib_uverbs_kern_spec_to_ib_spec_filter(enum ib_flow_spec_type type,
2758 const void *kern_spec_mask,
2759 const void *kern_spec_val,
2760 size_t kern_filter_sz,
2761 union ib_flow_spec *ib_spec)
2762 {
2763 ssize_t actual_filter_sz;
2764 ssize_t ib_filter_sz;
2765
2766 /* User flow spec size must be aligned to 4 bytes */
2767 if (kern_filter_sz != ALIGN(kern_filter_sz, 4))
2768 return -EINVAL;
2769
2770 ib_spec->type = type;
2771
2772 if (ib_spec->type == (IB_FLOW_SPEC_INNER | IB_FLOW_SPEC_VXLAN_TUNNEL))
2773 return -EINVAL;
2774
2775 switch (ib_spec->type & ~IB_FLOW_SPEC_INNER) {
2776 case IB_FLOW_SPEC_ETH:
2777 ib_filter_sz = offsetof(struct ib_flow_eth_filter, real_sz);
2778 actual_filter_sz = spec_filter_size(kern_spec_mask,
2779 kern_filter_sz,
2780 ib_filter_sz);
2781 if (actual_filter_sz <= 0)
2782 return -EINVAL;
2783 ib_spec->size = sizeof(struct ib_flow_spec_eth);
2784 memcpy(&ib_spec->eth.val, kern_spec_val, actual_filter_sz);
2785 memcpy(&ib_spec->eth.mask, kern_spec_mask, actual_filter_sz);
2786 break;
2787 case IB_FLOW_SPEC_IPV4:
2788 ib_filter_sz = offsetof(struct ib_flow_ipv4_filter, real_sz);
2789 actual_filter_sz = spec_filter_size(kern_spec_mask,
2790 kern_filter_sz,
2791 ib_filter_sz);
2792 if (actual_filter_sz <= 0)
2793 return -EINVAL;
2794 ib_spec->size = sizeof(struct ib_flow_spec_ipv4);
2795 memcpy(&ib_spec->ipv4.val, kern_spec_val, actual_filter_sz);
2796 memcpy(&ib_spec->ipv4.mask, kern_spec_mask, actual_filter_sz);
2797 break;
2798 case IB_FLOW_SPEC_IPV6:
2799 ib_filter_sz = offsetof(struct ib_flow_ipv6_filter, real_sz);
2800 actual_filter_sz = spec_filter_size(kern_spec_mask,
2801 kern_filter_sz,
2802 ib_filter_sz);
2803 if (actual_filter_sz <= 0)
2804 return -EINVAL;
2805 ib_spec->size = sizeof(struct ib_flow_spec_ipv6);
2806 memcpy(&ib_spec->ipv6.val, kern_spec_val, actual_filter_sz);
2807 memcpy(&ib_spec->ipv6.mask, kern_spec_mask, actual_filter_sz);
2808
2809 if ((ntohl(ib_spec->ipv6.mask.flow_label)) >= BIT(20) ||
2810 (ntohl(ib_spec->ipv6.val.flow_label)) >= BIT(20))
2811 return -EINVAL;
2812 break;
2813 case IB_FLOW_SPEC_TCP:
2814 case IB_FLOW_SPEC_UDP:
2815 ib_filter_sz = offsetof(struct ib_flow_tcp_udp_filter, real_sz);
2816 actual_filter_sz = spec_filter_size(kern_spec_mask,
2817 kern_filter_sz,
2818 ib_filter_sz);
2819 if (actual_filter_sz <= 0)
2820 return -EINVAL;
2821 ib_spec->size = sizeof(struct ib_flow_spec_tcp_udp);
2822 memcpy(&ib_spec->tcp_udp.val, kern_spec_val, actual_filter_sz);
2823 memcpy(&ib_spec->tcp_udp.mask, kern_spec_mask, actual_filter_sz);
2824 break;
2825 case IB_FLOW_SPEC_VXLAN_TUNNEL:
2826 ib_filter_sz = offsetof(struct ib_flow_tunnel_filter, real_sz);
2827 actual_filter_sz = spec_filter_size(kern_spec_mask,
2828 kern_filter_sz,
2829 ib_filter_sz);
2830 if (actual_filter_sz <= 0)
2831 return -EINVAL;
2832 ib_spec->tunnel.size = sizeof(struct ib_flow_spec_tunnel);
2833 memcpy(&ib_spec->tunnel.val, kern_spec_val, actual_filter_sz);
2834 memcpy(&ib_spec->tunnel.mask, kern_spec_mask, actual_filter_sz);
2835
2836 if ((ntohl(ib_spec->tunnel.mask.tunnel_id)) >= BIT(24) ||
2837 (ntohl(ib_spec->tunnel.val.tunnel_id)) >= BIT(24))
2838 return -EINVAL;
2839 break;
2840 case IB_FLOW_SPEC_ESP:
2841 ib_filter_sz = offsetof(struct ib_flow_esp_filter, real_sz);
2842 actual_filter_sz = spec_filter_size(kern_spec_mask,
2843 kern_filter_sz,
2844 ib_filter_sz);
2845 if (actual_filter_sz <= 0)
2846 return -EINVAL;
2847 ib_spec->esp.size = sizeof(struct ib_flow_spec_esp);
2848 memcpy(&ib_spec->esp.val, kern_spec_val, actual_filter_sz);
2849 memcpy(&ib_spec->esp.mask, kern_spec_mask, actual_filter_sz);
2850 break;
2851 case IB_FLOW_SPEC_GRE:
2852 ib_filter_sz = offsetof(struct ib_flow_gre_filter, real_sz);
2853 actual_filter_sz = spec_filter_size(kern_spec_mask,
2854 kern_filter_sz,
2855 ib_filter_sz);
2856 if (actual_filter_sz <= 0)
2857 return -EINVAL;
2858 ib_spec->gre.size = sizeof(struct ib_flow_spec_gre);
2859 memcpy(&ib_spec->gre.val, kern_spec_val, actual_filter_sz);
2860 memcpy(&ib_spec->gre.mask, kern_spec_mask, actual_filter_sz);
2861 break;
2862 case IB_FLOW_SPEC_MPLS:
2863 ib_filter_sz = offsetof(struct ib_flow_mpls_filter, real_sz);
2864 actual_filter_sz = spec_filter_size(kern_spec_mask,
2865 kern_filter_sz,
2866 ib_filter_sz);
2867 if (actual_filter_sz <= 0)
2868 return -EINVAL;
2869 ib_spec->mpls.size = sizeof(struct ib_flow_spec_mpls);
2870 memcpy(&ib_spec->mpls.val, kern_spec_val, actual_filter_sz);
2871 memcpy(&ib_spec->mpls.mask, kern_spec_mask, actual_filter_sz);
2872 break;
2873 default:
2874 return -EINVAL;
2875 }
2876 return 0;
2877 }
2878
2879 static int kern_spec_to_ib_spec_filter(struct ib_uverbs_flow_spec *kern_spec,
2880 union ib_flow_spec *ib_spec)
2881 {
2882 size_t kern_filter_sz;
2883 void *kern_spec_mask;
2884 void *kern_spec_val;
2885
2886 if (check_sub_overflow((size_t)kern_spec->hdr.size,
2887 sizeof(struct ib_uverbs_flow_spec_hdr),
2888 &kern_filter_sz))
2889 return -EINVAL;
2890
2891 kern_filter_sz /= 2;
2892
2893 kern_spec_val = (void *)kern_spec +
2894 sizeof(struct ib_uverbs_flow_spec_hdr);
2895 kern_spec_mask = kern_spec_val + kern_filter_sz;
2896
2897 return ib_uverbs_kern_spec_to_ib_spec_filter(kern_spec->type,
2898 kern_spec_mask,
2899 kern_spec_val,
2900 kern_filter_sz, ib_spec);
2901 }
2902
2903 static int kern_spec_to_ib_spec(struct uverbs_attr_bundle *attrs,
2904 struct ib_uverbs_flow_spec *kern_spec,
2905 union ib_flow_spec *ib_spec,
2906 struct ib_uflow_resources *uflow_res)
2907 {
2908 if (kern_spec->reserved)
2909 return -EINVAL;
2910
2911 if (kern_spec->type >= IB_FLOW_SPEC_ACTION_TAG)
2912 return kern_spec_to_ib_spec_action(attrs, kern_spec, ib_spec,
2913 uflow_res);
2914 else
2915 return kern_spec_to_ib_spec_filter(kern_spec, ib_spec);
2916 }
2917
2918 static int ib_uverbs_ex_create_wq(struct uverbs_attr_bundle *attrs)
2919 {
2920 struct ib_uverbs_ex_create_wq cmd;
2921 struct ib_uverbs_ex_create_wq_resp resp = {};
2922 struct ib_uwq_object *obj;
2923 int err = 0;
2924 struct ib_cq *cq;
2925 struct ib_pd *pd;
2926 struct ib_wq *wq;
2927 struct ib_wq_init_attr wq_init_attr = {};
2928 struct ib_device *ib_dev;
2929
2930 err = uverbs_request(attrs, &cmd, sizeof(cmd));
2931 if (err)
2932 return err;
2933
2934 if (cmd.comp_mask)
2935 return -EOPNOTSUPP;
2936
2937 obj = (struct ib_uwq_object *)uobj_alloc(UVERBS_OBJECT_WQ, attrs,
2938 &ib_dev);
2939 if (IS_ERR(obj))
2940 return PTR_ERR(obj);
2941
2942 pd = uobj_get_obj_read(pd, UVERBS_OBJECT_PD, cmd.pd_handle, attrs);
2943 if (!pd) {
2944 err = -EINVAL;
2945 goto err_uobj;
2946 }
2947
2948 cq = uobj_get_obj_read(cq, UVERBS_OBJECT_CQ, cmd.cq_handle, attrs);
2949 if (!cq) {
2950 err = -EINVAL;
2951 goto err_put_pd;
2952 }
2953
2954 wq_init_attr.cq = cq;
2955 wq_init_attr.max_sge = cmd.max_sge;
2956 wq_init_attr.max_wr = cmd.max_wr;
2957 wq_init_attr.wq_context = attrs->ufile;
2958 wq_init_attr.wq_type = cmd.wq_type;
2959 wq_init_attr.event_handler = ib_uverbs_wq_event_handler;
2960 wq_init_attr.create_flags = cmd.create_flags;
2961 INIT_LIST_HEAD(&obj->uevent.event_list);
2962
2963 wq = pd->device->ops.create_wq(pd, &wq_init_attr, &attrs->driver_udata);
2964 if (IS_ERR(wq)) {
2965 err = PTR_ERR(wq);
2966 goto err_put_cq;
2967 }
2968
2969 wq->uobject = obj;
2970 obj->uevent.uobject.object = wq;
2971 wq->wq_type = wq_init_attr.wq_type;
2972 wq->cq = cq;
2973 wq->pd = pd;
2974 wq->device = pd->device;
2975 wq->wq_context = wq_init_attr.wq_context;
2976 atomic_set(&wq->usecnt, 0);
2977 atomic_inc(&pd->usecnt);
2978 atomic_inc(&cq->usecnt);
2979 wq->uobject = obj;
2980 obj->uevent.uobject.object = wq;
2981
2982 memset(&resp, 0, sizeof(resp));
2983 resp.wq_handle = obj->uevent.uobject.id;
2984 resp.max_sge = wq_init_attr.max_sge;
2985 resp.max_wr = wq_init_attr.max_wr;
2986 resp.wqn = wq->wq_num;
2987 resp.response_length = uverbs_response_length(attrs, sizeof(resp));
2988 err = uverbs_response(attrs, &resp, sizeof(resp));
2989 if (err)
2990 goto err_copy;
2991
2992 uobj_put_obj_read(pd);
2993 rdma_lookup_put_uobject(&cq->uobject->uevent.uobject,
2994 UVERBS_LOOKUP_READ);
2995 rdma_alloc_commit_uobject(&obj->uevent.uobject, attrs);
2996 return 0;
2997
2998 err_copy:
2999 ib_destroy_wq(wq, uverbs_get_cleared_udata(attrs));
3000 err_put_cq:
3001 rdma_lookup_put_uobject(&cq->uobject->uevent.uobject,
3002 UVERBS_LOOKUP_READ);
3003 err_put_pd:
3004 uobj_put_obj_read(pd);
3005 err_uobj:
3006 uobj_alloc_abort(&obj->uevent.uobject, attrs);
3007
3008 return err;
3009 }
3010
3011 static int ib_uverbs_ex_destroy_wq(struct uverbs_attr_bundle *attrs)
3012 {
3013 struct ib_uverbs_ex_destroy_wq cmd;
3014 struct ib_uverbs_ex_destroy_wq_resp resp = {};
3015 struct ib_uobject *uobj;
3016 struct ib_uwq_object *obj;
3017 int ret;
3018
3019 ret = uverbs_request(attrs, &cmd, sizeof(cmd));
3020 if (ret)
3021 return ret;
3022
3023 if (cmd.comp_mask)
3024 return -EOPNOTSUPP;
3025
3026 resp.response_length = uverbs_response_length(attrs, sizeof(resp));
3027 uobj = uobj_get_destroy(UVERBS_OBJECT_WQ, cmd.wq_handle, attrs);
3028 if (IS_ERR(uobj))
3029 return PTR_ERR(uobj);
3030
3031 obj = container_of(uobj, struct ib_uwq_object, uevent.uobject);
3032 resp.events_reported = obj->uevent.events_reported;
3033
3034 uobj_put_destroy(uobj);
3035
3036 return uverbs_response(attrs, &resp, sizeof(resp));
3037 }
3038
3039 static int ib_uverbs_ex_modify_wq(struct uverbs_attr_bundle *attrs)
3040 {
3041 struct ib_uverbs_ex_modify_wq cmd;
3042 struct ib_wq *wq;
3043 struct ib_wq_attr wq_attr = {};
3044 int ret;
3045
3046 ret = uverbs_request(attrs, &cmd, sizeof(cmd));
3047 if (ret)
3048 return ret;
3049
3050 if (!cmd.attr_mask)
3051 return -EINVAL;
3052
3053 if (cmd.attr_mask > (IB_WQ_STATE | IB_WQ_CUR_STATE | IB_WQ_FLAGS))
3054 return -EINVAL;
3055
3056 wq = uobj_get_obj_read(wq, UVERBS_OBJECT_WQ, cmd.wq_handle, attrs);
3057 if (!wq)
3058 return -EINVAL;
3059
3060 wq_attr.curr_wq_state = cmd.curr_wq_state;
3061 wq_attr.wq_state = cmd.wq_state;
3062 if (cmd.attr_mask & IB_WQ_FLAGS) {
3063 wq_attr.flags = cmd.flags;
3064 wq_attr.flags_mask = cmd.flags_mask;
3065 }
3066 ret = wq->device->ops.modify_wq(wq, &wq_attr, cmd.attr_mask,
3067 &attrs->driver_udata);
3068 rdma_lookup_put_uobject(&wq->uobject->uevent.uobject,
3069 UVERBS_LOOKUP_READ);
3070 return ret;
3071 }
3072
3073 static int ib_uverbs_ex_create_rwq_ind_table(struct uverbs_attr_bundle *attrs)
3074 {
3075 struct ib_uverbs_ex_create_rwq_ind_table cmd;
3076 struct ib_uverbs_ex_create_rwq_ind_table_resp resp = {};
3077 struct ib_uobject *uobj;
3078 int err;
3079 struct ib_rwq_ind_table_init_attr init_attr = {};
3080 struct ib_rwq_ind_table *rwq_ind_tbl;
3081 struct ib_wq **wqs = NULL;
3082 u32 *wqs_handles = NULL;
3083 struct ib_wq *wq = NULL;
3084 int i, j, num_read_wqs;
3085 u32 num_wq_handles;
3086 struct uverbs_req_iter iter;
3087 struct ib_device *ib_dev;
3088
3089 err = uverbs_request_start(attrs, &iter, &cmd, sizeof(cmd));
3090 if (err)
3091 return err;
3092
3093 if (cmd.comp_mask)
3094 return -EOPNOTSUPP;
3095
3096 if (cmd.log_ind_tbl_size > IB_USER_VERBS_MAX_LOG_IND_TBL_SIZE)
3097 return -EINVAL;
3098
3099 num_wq_handles = 1 << cmd.log_ind_tbl_size;
3100 wqs_handles = kcalloc(num_wq_handles, sizeof(*wqs_handles),
3101 GFP_KERNEL);
3102 if (!wqs_handles)
3103 return -ENOMEM;
3104
3105 err = uverbs_request_next(&iter, wqs_handles,
3106 num_wq_handles * sizeof(__u32));
3107 if (err)
3108 goto err_free;
3109
3110 err = uverbs_request_finish(&iter);
3111 if (err)
3112 goto err_free;
3113
3114 wqs = kcalloc(num_wq_handles, sizeof(*wqs), GFP_KERNEL);
3115 if (!wqs) {
3116 err = -ENOMEM;
3117 goto err_free;
3118 }
3119
3120 for (num_read_wqs = 0; num_read_wqs < num_wq_handles;
3121 num_read_wqs++) {
3122 wq = uobj_get_obj_read(wq, UVERBS_OBJECT_WQ,
3123 wqs_handles[num_read_wqs], attrs);
3124 if (!wq) {
3125 err = -EINVAL;
3126 goto put_wqs;
3127 }
3128
3129 wqs[num_read_wqs] = wq;
3130 }
3131
3132 uobj = uobj_alloc(UVERBS_OBJECT_RWQ_IND_TBL, attrs, &ib_dev);
3133 if (IS_ERR(uobj)) {
3134 err = PTR_ERR(uobj);
3135 goto put_wqs;
3136 }
3137
3138 init_attr.log_ind_tbl_size = cmd.log_ind_tbl_size;
3139 init_attr.ind_tbl = wqs;
3140
3141 rwq_ind_tbl = ib_dev->ops.create_rwq_ind_table(ib_dev, &init_attr,
3142 &attrs->driver_udata);
3143
3144 if (IS_ERR(rwq_ind_tbl)) {
3145 err = PTR_ERR(rwq_ind_tbl);
3146 goto err_uobj;
3147 }
3148
3149 rwq_ind_tbl->ind_tbl = wqs;
3150 rwq_ind_tbl->log_ind_tbl_size = init_attr.log_ind_tbl_size;
3151 rwq_ind_tbl->uobject = uobj;
3152 uobj->object = rwq_ind_tbl;
3153 rwq_ind_tbl->device = ib_dev;
3154 atomic_set(&rwq_ind_tbl->usecnt, 0);
3155
3156 for (i = 0; i < num_wq_handles; i++)
3157 atomic_inc(&wqs[i]->usecnt);
3158
3159 resp.ind_tbl_handle = uobj->id;
3160 resp.ind_tbl_num = rwq_ind_tbl->ind_tbl_num;
3161 resp.response_length = uverbs_response_length(attrs, sizeof(resp));
3162
3163 err = uverbs_response(attrs, &resp, sizeof(resp));
3164 if (err)
3165 goto err_copy;
3166
3167 kfree(wqs_handles);
3168
3169 for (j = 0; j < num_read_wqs; j++)
3170 rdma_lookup_put_uobject(&wqs[j]->uobject->uevent.uobject,
3171 UVERBS_LOOKUP_READ);
3172
3173 rdma_alloc_commit_uobject(uobj, attrs);
3174 return 0;
3175
3176 err_copy:
3177 ib_destroy_rwq_ind_table(rwq_ind_tbl);
3178 err_uobj:
3179 uobj_alloc_abort(uobj, attrs);
3180 put_wqs:
3181 for (j = 0; j < num_read_wqs; j++)
3182 rdma_lookup_put_uobject(&wqs[j]->uobject->uevent.uobject,
3183 UVERBS_LOOKUP_READ);
3184 err_free:
3185 kfree(wqs_handles);
3186 kfree(wqs);
3187 return err;
3188 }
3189
3190 static int ib_uverbs_ex_destroy_rwq_ind_table(struct uverbs_attr_bundle *attrs)
3191 {
3192 struct ib_uverbs_ex_destroy_rwq_ind_table cmd;
3193 int ret;
3194
3195 ret = uverbs_request(attrs, &cmd, sizeof(cmd));
3196 if (ret)
3197 return ret;
3198
3199 if (cmd.comp_mask)
3200 return -EOPNOTSUPP;
3201
3202 return uobj_perform_destroy(UVERBS_OBJECT_RWQ_IND_TBL,
3203 cmd.ind_tbl_handle, attrs);
3204 }
3205
3206 static int ib_uverbs_ex_create_flow(struct uverbs_attr_bundle *attrs)
3207 {
3208 struct ib_uverbs_create_flow cmd;
3209 struct ib_uverbs_create_flow_resp resp;
3210 struct ib_uobject *uobj;
3211 struct ib_flow *flow_id;
3212 struct ib_uverbs_flow_attr *kern_flow_attr;
3213 struct ib_flow_attr *flow_attr;
3214 struct ib_qp *qp;
3215 struct ib_uflow_resources *uflow_res;
3216 struct ib_uverbs_flow_spec_hdr *kern_spec;
3217 struct uverbs_req_iter iter;
3218 int err;
3219 void *ib_spec;
3220 int i;
3221 struct ib_device *ib_dev;
3222
3223 err = uverbs_request_start(attrs, &iter, &cmd, sizeof(cmd));
3224 if (err)
3225 return err;
3226
3227 if (cmd.comp_mask)
3228 return -EINVAL;
3229
3230 if (!capable(CAP_NET_RAW))
3231 return -EPERM;
3232
3233 if (cmd.flow_attr.flags >= IB_FLOW_ATTR_FLAGS_RESERVED)
3234 return -EINVAL;
3235
3236 if ((cmd.flow_attr.flags & IB_FLOW_ATTR_FLAGS_DONT_TRAP) &&
3237 ((cmd.flow_attr.type == IB_FLOW_ATTR_ALL_DEFAULT) ||
3238 (cmd.flow_attr.type == IB_FLOW_ATTR_MC_DEFAULT)))
3239 return -EINVAL;
3240
3241 if (cmd.flow_attr.num_of_specs > IB_FLOW_SPEC_SUPPORT_LAYERS)
3242 return -EINVAL;
3243
3244 if (cmd.flow_attr.size >
3245 (cmd.flow_attr.num_of_specs * sizeof(struct ib_uverbs_flow_spec)))
3246 return -EINVAL;
3247
3248 if (cmd.flow_attr.reserved[0] ||
3249 cmd.flow_attr.reserved[1])
3250 return -EINVAL;
3251
3252 if (cmd.flow_attr.num_of_specs) {
3253 kern_flow_attr = kmalloc(sizeof(*kern_flow_attr) + cmd.flow_attr.size,
3254 GFP_KERNEL);
3255 if (!kern_flow_attr)
3256 return -ENOMEM;
3257
3258 *kern_flow_attr = cmd.flow_attr;
3259 err = uverbs_request_next(&iter, &kern_flow_attr->flow_specs,
3260 cmd.flow_attr.size);
3261 if (err)
3262 goto err_free_attr;
3263 } else {
3264 kern_flow_attr = &cmd.flow_attr;
3265 }
3266
3267 err = uverbs_request_finish(&iter);
3268 if (err)
3269 goto err_free_attr;
3270
3271 uobj = uobj_alloc(UVERBS_OBJECT_FLOW, attrs, &ib_dev);
3272 if (IS_ERR(uobj)) {
3273 err = PTR_ERR(uobj);
3274 goto err_free_attr;
3275 }
3276
3277 qp = uobj_get_obj_read(qp, UVERBS_OBJECT_QP, cmd.qp_handle, attrs);
3278 if (!qp) {
3279 err = -EINVAL;
3280 goto err_uobj;
3281 }
3282
3283 if (qp->qp_type != IB_QPT_UD && qp->qp_type != IB_QPT_RAW_PACKET) {
3284 err = -EINVAL;
3285 goto err_put;
3286 }
3287
3288 flow_attr = kzalloc(struct_size(flow_attr, flows,
3289 cmd.flow_attr.num_of_specs), GFP_KERNEL);
3290 if (!flow_attr) {
3291 err = -ENOMEM;
3292 goto err_put;
3293 }
3294 uflow_res = flow_resources_alloc(cmd.flow_attr.num_of_specs);
3295 if (!uflow_res) {
3296 err = -ENOMEM;
3297 goto err_free_flow_attr;
3298 }
3299
3300 flow_attr->type = kern_flow_attr->type;
3301 flow_attr->priority = kern_flow_attr->priority;
3302 flow_attr->num_of_specs = kern_flow_attr->num_of_specs;
3303 flow_attr->port = kern_flow_attr->port;
3304 flow_attr->flags = kern_flow_attr->flags;
3305 flow_attr->size = sizeof(*flow_attr);
3306
3307 kern_spec = kern_flow_attr->flow_specs;
3308 ib_spec = flow_attr + 1;
3309 for (i = 0; i < flow_attr->num_of_specs &&
3310 cmd.flow_attr.size >= sizeof(*kern_spec) &&
3311 cmd.flow_attr.size >= kern_spec->size;
3312 i++) {
3313 err = kern_spec_to_ib_spec(
3314 attrs, (struct ib_uverbs_flow_spec *)kern_spec,
3315 ib_spec, uflow_res);
3316 if (err)
3317 goto err_free;
3318
3319 flow_attr->size +=
3320 ((union ib_flow_spec *) ib_spec)->size;
3321 cmd.flow_attr.size -= kern_spec->size;
3322 kern_spec = ((void *)kern_spec) + kern_spec->size;
3323 ib_spec += ((union ib_flow_spec *) ib_spec)->size;
3324 }
3325 if (cmd.flow_attr.size || (i != flow_attr->num_of_specs)) {
3326 pr_warn("create flow failed, flow %d: %d bytes left from uverb cmd\n",
3327 i, cmd.flow_attr.size);
3328 err = -EINVAL;
3329 goto err_free;
3330 }
3331
3332 flow_id = qp->device->ops.create_flow(
3333 qp, flow_attr, IB_FLOW_DOMAIN_USER, &attrs->driver_udata);
3334
3335 if (IS_ERR(flow_id)) {
3336 err = PTR_ERR(flow_id);
3337 goto err_free;
3338 }
3339
3340 ib_set_flow(uobj, flow_id, qp, qp->device, uflow_res);
3341
3342 memset(&resp, 0, sizeof(resp));
3343 resp.flow_handle = uobj->id;
3344
3345 err = uverbs_response(attrs, &resp, sizeof(resp));
3346 if (err)
3347 goto err_copy;
3348
3349 rdma_lookup_put_uobject(&qp->uobject->uevent.uobject,
3350 UVERBS_LOOKUP_READ);
3351 kfree(flow_attr);
3352 if (cmd.flow_attr.num_of_specs)
3353 kfree(kern_flow_attr);
3354 rdma_alloc_commit_uobject(uobj, attrs);
3355 return 0;
3356 err_copy:
3357 if (!qp->device->ops.destroy_flow(flow_id))
3358 atomic_dec(&qp->usecnt);
3359 err_free:
3360 ib_uverbs_flow_resources_free(uflow_res);
3361 err_free_flow_attr:
3362 kfree(flow_attr);
3363 err_put:
3364 rdma_lookup_put_uobject(&qp->uobject->uevent.uobject,
3365 UVERBS_LOOKUP_READ);
3366 err_uobj:
3367 uobj_alloc_abort(uobj, attrs);
3368 err_free_attr:
3369 if (cmd.flow_attr.num_of_specs)
3370 kfree(kern_flow_attr);
3371 return err;
3372 }
3373
3374 static int ib_uverbs_ex_destroy_flow(struct uverbs_attr_bundle *attrs)
3375 {
3376 struct ib_uverbs_destroy_flow cmd;
3377 int ret;
3378
3379 ret = uverbs_request(attrs, &cmd, sizeof(cmd));
3380 if (ret)
3381 return ret;
3382
3383 if (cmd.comp_mask)
3384 return -EINVAL;
3385
3386 return uobj_perform_destroy(UVERBS_OBJECT_FLOW, cmd.flow_handle, attrs);
3387 }
3388
3389 static int __uverbs_create_xsrq(struct uverbs_attr_bundle *attrs,
3390 struct ib_uverbs_create_xsrq *cmd,
3391 struct ib_udata *udata)
3392 {
3393 struct ib_uverbs_create_srq_resp resp;
3394 struct ib_usrq_object *obj;
3395 struct ib_pd *pd;
3396 struct ib_srq *srq;
3397 struct ib_uobject *uninitialized_var(xrcd_uobj);
3398 struct ib_srq_init_attr attr;
3399 int ret;
3400 struct ib_device *ib_dev;
3401
3402 obj = (struct ib_usrq_object *)uobj_alloc(UVERBS_OBJECT_SRQ, attrs,
3403 &ib_dev);
3404 if (IS_ERR(obj))
3405 return PTR_ERR(obj);
3406
3407 if (cmd->srq_type == IB_SRQT_TM)
3408 attr.ext.tag_matching.max_num_tags = cmd->max_num_tags;
3409
3410 if (cmd->srq_type == IB_SRQT_XRC) {
3411 xrcd_uobj = uobj_get_read(UVERBS_OBJECT_XRCD, cmd->xrcd_handle,
3412 attrs);
3413 if (IS_ERR(xrcd_uobj)) {
3414 ret = -EINVAL;
3415 goto err;
3416 }
3417
3418 attr.ext.xrc.xrcd = (struct ib_xrcd *)xrcd_uobj->object;
3419 if (!attr.ext.xrc.xrcd) {
3420 ret = -EINVAL;
3421 goto err_put_xrcd;
3422 }
3423
3424 obj->uxrcd = container_of(xrcd_uobj, struct ib_uxrcd_object, uobject);
3425 atomic_inc(&obj->uxrcd->refcnt);
3426 }
3427
3428 if (ib_srq_has_cq(cmd->srq_type)) {
3429 attr.ext.cq = uobj_get_obj_read(cq, UVERBS_OBJECT_CQ,
3430 cmd->cq_handle, attrs);
3431 if (!attr.ext.cq) {
3432 ret = -EINVAL;
3433 goto err_put_xrcd;
3434 }
3435 }
3436
3437 pd = uobj_get_obj_read(pd, UVERBS_OBJECT_PD, cmd->pd_handle, attrs);
3438 if (!pd) {
3439 ret = -EINVAL;
3440 goto err_put_cq;
3441 }
3442
3443 attr.event_handler = ib_uverbs_srq_event_handler;
3444 attr.srq_context = attrs->ufile;
3445 attr.srq_type = cmd->srq_type;
3446 attr.attr.max_wr = cmd->max_wr;
3447 attr.attr.max_sge = cmd->max_sge;
3448 attr.attr.srq_limit = cmd->srq_limit;
3449
3450 INIT_LIST_HEAD(&obj->uevent.event_list);
3451
3452 srq = rdma_zalloc_drv_obj(ib_dev, ib_srq);
3453 if (!srq) {
3454 ret = -ENOMEM;
3455 goto err_put;
3456 }
3457
3458 srq->device = pd->device;
3459 srq->pd = pd;
3460 srq->srq_type = cmd->srq_type;
3461 srq->uobject = obj;
3462 srq->event_handler = attr.event_handler;
3463 srq->srq_context = attr.srq_context;
3464
3465 ret = pd->device->ops.create_srq(srq, &attr, udata);
3466 if (ret)
3467 goto err_free;
3468
3469 if (ib_srq_has_cq(cmd->srq_type)) {
3470 srq->ext.cq = attr.ext.cq;
3471 atomic_inc(&attr.ext.cq->usecnt);
3472 }
3473
3474 if (cmd->srq_type == IB_SRQT_XRC) {
3475 srq->ext.xrc.xrcd = attr.ext.xrc.xrcd;
3476 atomic_inc(&attr.ext.xrc.xrcd->usecnt);
3477 }
3478
3479 atomic_inc(&pd->usecnt);
3480 atomic_set(&srq->usecnt, 0);
3481
3482 obj->uevent.uobject.object = srq;
3483 obj->uevent.uobject.user_handle = cmd->user_handle;
3484
3485 memset(&resp, 0, sizeof resp);
3486 resp.srq_handle = obj->uevent.uobject.id;
3487 resp.max_wr = attr.attr.max_wr;
3488 resp.max_sge = attr.attr.max_sge;
3489 if (cmd->srq_type == IB_SRQT_XRC)
3490 resp.srqn = srq->ext.xrc.srq_num;
3491
3492 ret = uverbs_response(attrs, &resp, sizeof(resp));
3493 if (ret)
3494 goto err_copy;
3495
3496 if (cmd->srq_type == IB_SRQT_XRC)
3497 uobj_put_read(xrcd_uobj);
3498
3499 if (ib_srq_has_cq(cmd->srq_type))
3500 rdma_lookup_put_uobject(&attr.ext.cq->uobject->uevent.uobject,
3501 UVERBS_LOOKUP_READ);
3502
3503 uobj_put_obj_read(pd);
3504 rdma_alloc_commit_uobject(&obj->uevent.uobject, attrs);
3505 return 0;
3506
3507 err_copy:
3508 ib_destroy_srq_user(srq, uverbs_get_cleared_udata(attrs));
3509 /* It was released in ib_destroy_srq_user */
3510 srq = NULL;
3511 err_free:
3512 kfree(srq);
3513 err_put:
3514 uobj_put_obj_read(pd);
3515
3516 err_put_cq:
3517 if (ib_srq_has_cq(cmd->srq_type))
3518 rdma_lookup_put_uobject(&attr.ext.cq->uobject->uevent.uobject,
3519 UVERBS_LOOKUP_READ);
3520
3521 err_put_xrcd:
3522 if (cmd->srq_type == IB_SRQT_XRC) {
3523 atomic_dec(&obj->uxrcd->refcnt);
3524 uobj_put_read(xrcd_uobj);
3525 }
3526
3527 err:
3528 uobj_alloc_abort(&obj->uevent.uobject, attrs);
3529 return ret;
3530 }
3531
3532 static int ib_uverbs_create_srq(struct uverbs_attr_bundle *attrs)
3533 {
3534 struct ib_uverbs_create_srq cmd;
3535 struct ib_uverbs_create_xsrq xcmd;
3536 int ret;
3537
3538 ret = uverbs_request(attrs, &cmd, sizeof(cmd));
3539 if (ret)
3540 return ret;
3541
3542 memset(&xcmd, 0, sizeof(xcmd));
3543 xcmd.response = cmd.response;
3544 xcmd.user_handle = cmd.user_handle;
3545 xcmd.srq_type = IB_SRQT_BASIC;
3546 xcmd.pd_handle = cmd.pd_handle;
3547 xcmd.max_wr = cmd.max_wr;
3548 xcmd.max_sge = cmd.max_sge;
3549 xcmd.srq_limit = cmd.srq_limit;
3550
3551 return __uverbs_create_xsrq(attrs, &xcmd, &attrs->driver_udata);
3552 }
3553
3554 static int ib_uverbs_create_xsrq(struct uverbs_attr_bundle *attrs)
3555 {
3556 struct ib_uverbs_create_xsrq cmd;
3557 int ret;
3558
3559 ret = uverbs_request(attrs, &cmd, sizeof(cmd));
3560 if (ret)
3561 return ret;
3562
3563 return __uverbs_create_xsrq(attrs, &cmd, &attrs->driver_udata);
3564 }
3565
3566 static int ib_uverbs_modify_srq(struct uverbs_attr_bundle *attrs)
3567 {
3568 struct ib_uverbs_modify_srq cmd;
3569 struct ib_srq *srq;
3570 struct ib_srq_attr attr;
3571 int ret;
3572
3573 ret = uverbs_request(attrs, &cmd, sizeof(cmd));
3574 if (ret)
3575 return ret;
3576
3577 srq = uobj_get_obj_read(srq, UVERBS_OBJECT_SRQ, cmd.srq_handle, attrs);
3578 if (!srq)
3579 return -EINVAL;
3580
3581 attr.max_wr = cmd.max_wr;
3582 attr.srq_limit = cmd.srq_limit;
3583
3584 ret = srq->device->ops.modify_srq(srq, &attr, cmd.attr_mask,
3585 &attrs->driver_udata);
3586
3587 rdma_lookup_put_uobject(&srq->uobject->uevent.uobject,
3588 UVERBS_LOOKUP_READ);
3589
3590 return ret;
3591 }
3592
3593 static int ib_uverbs_query_srq(struct uverbs_attr_bundle *attrs)
3594 {
3595 struct ib_uverbs_query_srq cmd;
3596 struct ib_uverbs_query_srq_resp resp;
3597 struct ib_srq_attr attr;
3598 struct ib_srq *srq;
3599 int ret;
3600
3601 ret = uverbs_request(attrs, &cmd, sizeof(cmd));
3602 if (ret)
3603 return ret;
3604
3605 srq = uobj_get_obj_read(srq, UVERBS_OBJECT_SRQ, cmd.srq_handle, attrs);
3606 if (!srq)
3607 return -EINVAL;
3608
3609 ret = ib_query_srq(srq, &attr);
3610
3611 rdma_lookup_put_uobject(&srq->uobject->uevent.uobject,
3612 UVERBS_LOOKUP_READ);
3613
3614 if (ret)
3615 return ret;
3616
3617 memset(&resp, 0, sizeof resp);
3618
3619 resp.max_wr = attr.max_wr;
3620 resp.max_sge = attr.max_sge;
3621 resp.srq_limit = attr.srq_limit;
3622
3623 return uverbs_response(attrs, &resp, sizeof(resp));
3624 }
3625
3626 static int ib_uverbs_destroy_srq(struct uverbs_attr_bundle *attrs)
3627 {
3628 struct ib_uverbs_destroy_srq cmd;
3629 struct ib_uverbs_destroy_srq_resp resp;
3630 struct ib_uobject *uobj;
3631 struct ib_uevent_object *obj;
3632 int ret;
3633
3634 ret = uverbs_request(attrs, &cmd, sizeof(cmd));
3635 if (ret)
3636 return ret;
3637
3638 uobj = uobj_get_destroy(UVERBS_OBJECT_SRQ, cmd.srq_handle, attrs);
3639 if (IS_ERR(uobj))
3640 return PTR_ERR(uobj);
3641
3642 obj = container_of(uobj, struct ib_uevent_object, uobject);
3643 memset(&resp, 0, sizeof(resp));
3644 resp.events_reported = obj->events_reported;
3645
3646 uobj_put_destroy(uobj);
3647
3648 return uverbs_response(attrs, &resp, sizeof(resp));
3649 }
3650
3651 static int ib_uverbs_ex_query_device(struct uverbs_attr_bundle *attrs)
3652 {
3653 struct ib_uverbs_ex_query_device_resp resp = {};
3654 struct ib_uverbs_ex_query_device cmd;
3655 struct ib_device_attr attr = {0};
3656 struct ib_ucontext *ucontext;
3657 struct ib_device *ib_dev;
3658 int err;
3659
3660 ucontext = ib_uverbs_get_ucontext(attrs);
3661 if (IS_ERR(ucontext))
3662 return PTR_ERR(ucontext);
3663 ib_dev = ucontext->device;
3664
3665 err = uverbs_request(attrs, &cmd, sizeof(cmd));
3666 if (err)
3667 return err;
3668
3669 if (cmd.comp_mask)
3670 return -EINVAL;
3671
3672 if (cmd.reserved)
3673 return -EINVAL;
3674
3675 err = ib_dev->ops.query_device(ib_dev, &attr, &attrs->driver_udata);
3676 if (err)
3677 return err;
3678
3679 copy_query_dev_fields(ucontext, &resp.base, &attr);
3680
3681 resp.odp_caps.general_caps = attr.odp_caps.general_caps;
3682 resp.odp_caps.per_transport_caps.rc_odp_caps =
3683 attr.odp_caps.per_transport_caps.rc_odp_caps;
3684 resp.odp_caps.per_transport_caps.uc_odp_caps =
3685 attr.odp_caps.per_transport_caps.uc_odp_caps;
3686 resp.odp_caps.per_transport_caps.ud_odp_caps =
3687 attr.odp_caps.per_transport_caps.ud_odp_caps;
3688 resp.xrc_odp_caps = attr.odp_caps.per_transport_caps.xrc_odp_caps;
3689
3690 resp.timestamp_mask = attr.timestamp_mask;
3691 resp.hca_core_clock = attr.hca_core_clock;
3692 resp.device_cap_flags_ex = attr.device_cap_flags;
3693 resp.rss_caps.supported_qpts = attr.rss_caps.supported_qpts;
3694 resp.rss_caps.max_rwq_indirection_tables =
3695 attr.rss_caps.max_rwq_indirection_tables;
3696 resp.rss_caps.max_rwq_indirection_table_size =
3697 attr.rss_caps.max_rwq_indirection_table_size;
3698 resp.max_wq_type_rq = attr.max_wq_type_rq;
3699 resp.raw_packet_caps = attr.raw_packet_caps;
3700 resp.tm_caps.max_rndv_hdr_size = attr.tm_caps.max_rndv_hdr_size;
3701 resp.tm_caps.max_num_tags = attr.tm_caps.max_num_tags;
3702 resp.tm_caps.max_ops = attr.tm_caps.max_ops;
3703 resp.tm_caps.max_sge = attr.tm_caps.max_sge;
3704 resp.tm_caps.flags = attr.tm_caps.flags;
3705 resp.cq_moderation_caps.max_cq_moderation_count =
3706 attr.cq_caps.max_cq_moderation_count;
3707 resp.cq_moderation_caps.max_cq_moderation_period =
3708 attr.cq_caps.max_cq_moderation_period;
3709 resp.max_dm_size = attr.max_dm_size;
3710 resp.response_length = uverbs_response_length(attrs, sizeof(resp));
3711
3712 return uverbs_response(attrs, &resp, sizeof(resp));
3713 }
3714
3715 static int ib_uverbs_ex_modify_cq(struct uverbs_attr_bundle *attrs)
3716 {
3717 struct ib_uverbs_ex_modify_cq cmd;
3718 struct ib_cq *cq;
3719 int ret;
3720
3721 ret = uverbs_request(attrs, &cmd, sizeof(cmd));
3722 if (ret)
3723 return ret;
3724
3725 if (!cmd.attr_mask || cmd.reserved)
3726 return -EINVAL;
3727
3728 if (cmd.attr_mask > IB_CQ_MODERATE)
3729 return -EOPNOTSUPP;
3730
3731 cq = uobj_get_obj_read(cq, UVERBS_OBJECT_CQ, cmd.cq_handle, attrs);
3732 if (!cq)
3733 return -EINVAL;
3734
3735 ret = rdma_set_cq_moderation(cq, cmd.attr.cq_count, cmd.attr.cq_period);
3736
3737 rdma_lookup_put_uobject(&cq->uobject->uevent.uobject,
3738 UVERBS_LOOKUP_READ);
3739 return ret;
3740 }
3741
3742 /*
3743 * Describe the input structs for write(). Some write methods have an input
3744 * only struct, most have an input and output. If the struct has an output then
3745 * the 'response' u64 must be the first field in the request structure.
3746 *
3747 * If udata is present then both the request and response structs have a
3748 * trailing driver_data flex array. In this case the size of the base struct
3749 * cannot be changed.
3750 */
3751 #define UAPI_DEF_WRITE_IO(req, resp) \
3752 .write.has_resp = 1 + \
3753 BUILD_BUG_ON_ZERO(offsetof(req, response) != 0) + \
3754 BUILD_BUG_ON_ZERO(sizeof(((req *)0)->response) != \
3755 sizeof(u64)), \
3756 .write.req_size = sizeof(req), .write.resp_size = sizeof(resp)
3757
3758 #define UAPI_DEF_WRITE_I(req) .write.req_size = sizeof(req)
3759
3760 #define UAPI_DEF_WRITE_UDATA_IO(req, resp) \
3761 UAPI_DEF_WRITE_IO(req, resp), \
3762 .write.has_udata = \
3763 1 + \
3764 BUILD_BUG_ON_ZERO(offsetof(req, driver_data) != \
3765 sizeof(req)) + \
3766 BUILD_BUG_ON_ZERO(offsetof(resp, driver_data) != \
3767 sizeof(resp))
3768
3769 #define UAPI_DEF_WRITE_UDATA_I(req) \
3770 UAPI_DEF_WRITE_I(req), \
3771 .write.has_udata = \
3772 1 + BUILD_BUG_ON_ZERO(offsetof(req, driver_data) != \
3773 sizeof(req))
3774
3775 /*
3776 * The _EX versions are for use with WRITE_EX and allow the last struct member
3777 * to be specified. Buffers that do not include that member will be rejected.
3778 */
3779 #define UAPI_DEF_WRITE_IO_EX(req, req_last_member, resp, resp_last_member) \
3780 .write.has_resp = 1, \
3781 .write.req_size = offsetofend(req, req_last_member), \
3782 .write.resp_size = offsetofend(resp, resp_last_member)
3783
3784 #define UAPI_DEF_WRITE_I_EX(req, req_last_member) \
3785 .write.req_size = offsetofend(req, req_last_member)
3786
3787 const struct uapi_definition uverbs_def_write_intf[] = {
3788 DECLARE_UVERBS_OBJECT(
3789 UVERBS_OBJECT_AH,
3790 DECLARE_UVERBS_WRITE(IB_USER_VERBS_CMD_CREATE_AH,
3791 ib_uverbs_create_ah,
3792 UAPI_DEF_WRITE_UDATA_IO(
3793 struct ib_uverbs_create_ah,
3794 struct ib_uverbs_create_ah_resp),
3795 UAPI_DEF_METHOD_NEEDS_FN(create_ah)),
3796 DECLARE_UVERBS_WRITE(
3797 IB_USER_VERBS_CMD_DESTROY_AH,
3798 ib_uverbs_destroy_ah,
3799 UAPI_DEF_WRITE_I(struct ib_uverbs_destroy_ah),
3800 UAPI_DEF_METHOD_NEEDS_FN(destroy_ah))),
3801
3802 DECLARE_UVERBS_OBJECT(
3803 UVERBS_OBJECT_COMP_CHANNEL,
3804 DECLARE_UVERBS_WRITE(
3805 IB_USER_VERBS_CMD_CREATE_COMP_CHANNEL,
3806 ib_uverbs_create_comp_channel,
3807 UAPI_DEF_WRITE_IO(
3808 struct ib_uverbs_create_comp_channel,
3809 struct ib_uverbs_create_comp_channel_resp))),
3810
3811 DECLARE_UVERBS_OBJECT(
3812 UVERBS_OBJECT_CQ,
3813 DECLARE_UVERBS_WRITE(IB_USER_VERBS_CMD_CREATE_CQ,
3814 ib_uverbs_create_cq,
3815 UAPI_DEF_WRITE_UDATA_IO(
3816 struct ib_uverbs_create_cq,
3817 struct ib_uverbs_create_cq_resp),
3818 UAPI_DEF_METHOD_NEEDS_FN(create_cq)),
3819 DECLARE_UVERBS_WRITE(
3820 IB_USER_VERBS_CMD_DESTROY_CQ,
3821 ib_uverbs_destroy_cq,
3822 UAPI_DEF_WRITE_IO(struct ib_uverbs_destroy_cq,
3823 struct ib_uverbs_destroy_cq_resp),
3824 UAPI_DEF_METHOD_NEEDS_FN(destroy_cq)),
3825 DECLARE_UVERBS_WRITE(
3826 IB_USER_VERBS_CMD_POLL_CQ,
3827 ib_uverbs_poll_cq,
3828 UAPI_DEF_WRITE_IO(struct ib_uverbs_poll_cq,
3829 struct ib_uverbs_poll_cq_resp),
3830 UAPI_DEF_METHOD_NEEDS_FN(poll_cq)),
3831 DECLARE_UVERBS_WRITE(
3832 IB_USER_VERBS_CMD_REQ_NOTIFY_CQ,
3833 ib_uverbs_req_notify_cq,
3834 UAPI_DEF_WRITE_I(struct ib_uverbs_req_notify_cq),
3835 UAPI_DEF_METHOD_NEEDS_FN(req_notify_cq)),
3836 DECLARE_UVERBS_WRITE(IB_USER_VERBS_CMD_RESIZE_CQ,
3837 ib_uverbs_resize_cq,
3838 UAPI_DEF_WRITE_UDATA_IO(
3839 struct ib_uverbs_resize_cq,
3840 struct ib_uverbs_resize_cq_resp),
3841 UAPI_DEF_METHOD_NEEDS_FN(resize_cq)),
3842 DECLARE_UVERBS_WRITE_EX(
3843 IB_USER_VERBS_EX_CMD_CREATE_CQ,
3844 ib_uverbs_ex_create_cq,
3845 UAPI_DEF_WRITE_IO_EX(struct ib_uverbs_ex_create_cq,
3846 reserved,
3847 struct ib_uverbs_ex_create_cq_resp,
3848 response_length),
3849 UAPI_DEF_METHOD_NEEDS_FN(create_cq)),
3850 DECLARE_UVERBS_WRITE_EX(
3851 IB_USER_VERBS_EX_CMD_MODIFY_CQ,
3852 ib_uverbs_ex_modify_cq,
3853 UAPI_DEF_WRITE_I(struct ib_uverbs_ex_modify_cq),
3854 UAPI_DEF_METHOD_NEEDS_FN(create_cq))),
3855
3856 DECLARE_UVERBS_OBJECT(
3857 UVERBS_OBJECT_DEVICE,
3858 DECLARE_UVERBS_WRITE(IB_USER_VERBS_CMD_GET_CONTEXT,
3859 ib_uverbs_get_context,
3860 UAPI_DEF_WRITE_UDATA_IO(
3861 struct ib_uverbs_get_context,
3862 struct ib_uverbs_get_context_resp)),
3863 DECLARE_UVERBS_WRITE(
3864 IB_USER_VERBS_CMD_QUERY_DEVICE,
3865 ib_uverbs_query_device,
3866 UAPI_DEF_WRITE_IO(struct ib_uverbs_query_device,
3867 struct ib_uverbs_query_device_resp)),
3868 DECLARE_UVERBS_WRITE(
3869 IB_USER_VERBS_CMD_QUERY_PORT,
3870 ib_uverbs_query_port,
3871 UAPI_DEF_WRITE_IO(struct ib_uverbs_query_port,
3872 struct ib_uverbs_query_port_resp),
3873 UAPI_DEF_METHOD_NEEDS_FN(query_port)),
3874 DECLARE_UVERBS_WRITE_EX(
3875 IB_USER_VERBS_EX_CMD_QUERY_DEVICE,
3876 ib_uverbs_ex_query_device,
3877 UAPI_DEF_WRITE_IO_EX(
3878 struct ib_uverbs_ex_query_device,
3879 reserved,
3880 struct ib_uverbs_ex_query_device_resp,
3881 response_length),
3882 UAPI_DEF_METHOD_NEEDS_FN(query_device)),
3883 UAPI_DEF_OBJ_NEEDS_FN(alloc_ucontext),
3884 UAPI_DEF_OBJ_NEEDS_FN(dealloc_ucontext)),
3885
3886 DECLARE_UVERBS_OBJECT(
3887 UVERBS_OBJECT_FLOW,
3888 DECLARE_UVERBS_WRITE_EX(
3889 IB_USER_VERBS_EX_CMD_CREATE_FLOW,
3890 ib_uverbs_ex_create_flow,
3891 UAPI_DEF_WRITE_IO_EX(struct ib_uverbs_create_flow,
3892 flow_attr,
3893 struct ib_uverbs_create_flow_resp,
3894 flow_handle),
3895 UAPI_DEF_METHOD_NEEDS_FN(create_flow)),
3896 DECLARE_UVERBS_WRITE_EX(
3897 IB_USER_VERBS_EX_CMD_DESTROY_FLOW,
3898 ib_uverbs_ex_destroy_flow,
3899 UAPI_DEF_WRITE_I(struct ib_uverbs_destroy_flow),
3900 UAPI_DEF_METHOD_NEEDS_FN(destroy_flow))),
3901
3902 DECLARE_UVERBS_OBJECT(
3903 UVERBS_OBJECT_MR,
3904 DECLARE_UVERBS_WRITE(IB_USER_VERBS_CMD_DEREG_MR,
3905 ib_uverbs_dereg_mr,
3906 UAPI_DEF_WRITE_I(struct ib_uverbs_dereg_mr),
3907 UAPI_DEF_METHOD_NEEDS_FN(dereg_mr)),
3908 DECLARE_UVERBS_WRITE(
3909 IB_USER_VERBS_CMD_REG_MR,
3910 ib_uverbs_reg_mr,
3911 UAPI_DEF_WRITE_UDATA_IO(struct ib_uverbs_reg_mr,
3912 struct ib_uverbs_reg_mr_resp),
3913 UAPI_DEF_METHOD_NEEDS_FN(reg_user_mr)),
3914 DECLARE_UVERBS_WRITE(
3915 IB_USER_VERBS_CMD_REREG_MR,
3916 ib_uverbs_rereg_mr,
3917 UAPI_DEF_WRITE_UDATA_IO(struct ib_uverbs_rereg_mr,
3918 struct ib_uverbs_rereg_mr_resp),
3919 UAPI_DEF_METHOD_NEEDS_FN(rereg_user_mr))),
3920
3921 DECLARE_UVERBS_OBJECT(
3922 UVERBS_OBJECT_MW,
3923 DECLARE_UVERBS_WRITE(
3924 IB_USER_VERBS_CMD_ALLOC_MW,
3925 ib_uverbs_alloc_mw,
3926 UAPI_DEF_WRITE_UDATA_IO(struct ib_uverbs_alloc_mw,
3927 struct ib_uverbs_alloc_mw_resp),
3928 UAPI_DEF_METHOD_NEEDS_FN(alloc_mw)),
3929 DECLARE_UVERBS_WRITE(
3930 IB_USER_VERBS_CMD_DEALLOC_MW,
3931 ib_uverbs_dealloc_mw,
3932 UAPI_DEF_WRITE_I(struct ib_uverbs_dealloc_mw),
3933 UAPI_DEF_METHOD_NEEDS_FN(dealloc_mw))),
3934
3935 DECLARE_UVERBS_OBJECT(
3936 UVERBS_OBJECT_PD,
3937 DECLARE_UVERBS_WRITE(
3938 IB_USER_VERBS_CMD_ALLOC_PD,
3939 ib_uverbs_alloc_pd,
3940 UAPI_DEF_WRITE_UDATA_IO(struct ib_uverbs_alloc_pd,
3941 struct ib_uverbs_alloc_pd_resp),
3942 UAPI_DEF_METHOD_NEEDS_FN(alloc_pd)),
3943 DECLARE_UVERBS_WRITE(
3944 IB_USER_VERBS_CMD_DEALLOC_PD,
3945 ib_uverbs_dealloc_pd,
3946 UAPI_DEF_WRITE_I(struct ib_uverbs_dealloc_pd),
3947 UAPI_DEF_METHOD_NEEDS_FN(dealloc_pd))),
3948
3949 DECLARE_UVERBS_OBJECT(
3950 UVERBS_OBJECT_QP,
3951 DECLARE_UVERBS_WRITE(
3952 IB_USER_VERBS_CMD_ATTACH_MCAST,
3953 ib_uverbs_attach_mcast,
3954 UAPI_DEF_WRITE_I(struct ib_uverbs_attach_mcast),
3955 UAPI_DEF_METHOD_NEEDS_FN(attach_mcast),
3956 UAPI_DEF_METHOD_NEEDS_FN(detach_mcast)),
3957 DECLARE_UVERBS_WRITE(IB_USER_VERBS_CMD_CREATE_QP,
3958 ib_uverbs_create_qp,
3959 UAPI_DEF_WRITE_UDATA_IO(
3960 struct ib_uverbs_create_qp,
3961 struct ib_uverbs_create_qp_resp),
3962 UAPI_DEF_METHOD_NEEDS_FN(create_qp)),
3963 DECLARE_UVERBS_WRITE(
3964 IB_USER_VERBS_CMD_DESTROY_QP,
3965 ib_uverbs_destroy_qp,
3966 UAPI_DEF_WRITE_IO(struct ib_uverbs_destroy_qp,
3967 struct ib_uverbs_destroy_qp_resp),
3968 UAPI_DEF_METHOD_NEEDS_FN(destroy_qp)),
3969 DECLARE_UVERBS_WRITE(
3970 IB_USER_VERBS_CMD_DETACH_MCAST,
3971 ib_uverbs_detach_mcast,
3972 UAPI_DEF_WRITE_I(struct ib_uverbs_detach_mcast),
3973 UAPI_DEF_METHOD_NEEDS_FN(detach_mcast)),
3974 DECLARE_UVERBS_WRITE(
3975 IB_USER_VERBS_CMD_MODIFY_QP,
3976 ib_uverbs_modify_qp,
3977 UAPI_DEF_WRITE_I(struct ib_uverbs_modify_qp),
3978 UAPI_DEF_METHOD_NEEDS_FN(modify_qp)),
3979 DECLARE_UVERBS_WRITE(
3980 IB_USER_VERBS_CMD_POST_RECV,
3981 ib_uverbs_post_recv,
3982 UAPI_DEF_WRITE_IO(struct ib_uverbs_post_recv,
3983 struct ib_uverbs_post_recv_resp),
3984 UAPI_DEF_METHOD_NEEDS_FN(post_recv)),
3985 DECLARE_UVERBS_WRITE(
3986 IB_USER_VERBS_CMD_POST_SEND,
3987 ib_uverbs_post_send,
3988 UAPI_DEF_WRITE_IO(struct ib_uverbs_post_send,
3989 struct ib_uverbs_post_send_resp),
3990 UAPI_DEF_METHOD_NEEDS_FN(post_send)),
3991 DECLARE_UVERBS_WRITE(
3992 IB_USER_VERBS_CMD_QUERY_QP,
3993 ib_uverbs_query_qp,
3994 UAPI_DEF_WRITE_IO(struct ib_uverbs_query_qp,
3995 struct ib_uverbs_query_qp_resp),
3996 UAPI_DEF_METHOD_NEEDS_FN(query_qp)),
3997 DECLARE_UVERBS_WRITE_EX(
3998 IB_USER_VERBS_EX_CMD_CREATE_QP,
3999 ib_uverbs_ex_create_qp,
4000 UAPI_DEF_WRITE_IO_EX(struct ib_uverbs_ex_create_qp,
4001 comp_mask,
4002 struct ib_uverbs_ex_create_qp_resp,
4003 response_length),
4004 UAPI_DEF_METHOD_NEEDS_FN(create_qp)),
4005 DECLARE_UVERBS_WRITE_EX(
4006 IB_USER_VERBS_EX_CMD_MODIFY_QP,
4007 ib_uverbs_ex_modify_qp,
4008 UAPI_DEF_WRITE_IO_EX(struct ib_uverbs_ex_modify_qp,
4009 base,
4010 struct ib_uverbs_ex_modify_qp_resp,
4011 response_length),
4012 UAPI_DEF_METHOD_NEEDS_FN(modify_qp))),
4013
4014 DECLARE_UVERBS_OBJECT(
4015 UVERBS_OBJECT_RWQ_IND_TBL,
4016 DECLARE_UVERBS_WRITE_EX(
4017 IB_USER_VERBS_EX_CMD_CREATE_RWQ_IND_TBL,
4018 ib_uverbs_ex_create_rwq_ind_table,
4019 UAPI_DEF_WRITE_IO_EX(
4020 struct ib_uverbs_ex_create_rwq_ind_table,
4021 log_ind_tbl_size,
4022 struct ib_uverbs_ex_create_rwq_ind_table_resp,
4023 ind_tbl_num),
4024 UAPI_DEF_METHOD_NEEDS_FN(create_rwq_ind_table)),
4025 DECLARE_UVERBS_WRITE_EX(
4026 IB_USER_VERBS_EX_CMD_DESTROY_RWQ_IND_TBL,
4027 ib_uverbs_ex_destroy_rwq_ind_table,
4028 UAPI_DEF_WRITE_I(
4029 struct ib_uverbs_ex_destroy_rwq_ind_table),
4030 UAPI_DEF_METHOD_NEEDS_FN(destroy_rwq_ind_table))),
4031
4032 DECLARE_UVERBS_OBJECT(
4033 UVERBS_OBJECT_WQ,
4034 DECLARE_UVERBS_WRITE_EX(
4035 IB_USER_VERBS_EX_CMD_CREATE_WQ,
4036 ib_uverbs_ex_create_wq,
4037 UAPI_DEF_WRITE_IO_EX(struct ib_uverbs_ex_create_wq,
4038 max_sge,
4039 struct ib_uverbs_ex_create_wq_resp,
4040 wqn),
4041 UAPI_DEF_METHOD_NEEDS_FN(create_wq)),
4042 DECLARE_UVERBS_WRITE_EX(
4043 IB_USER_VERBS_EX_CMD_DESTROY_WQ,
4044 ib_uverbs_ex_destroy_wq,
4045 UAPI_DEF_WRITE_IO_EX(struct ib_uverbs_ex_destroy_wq,
4046 wq_handle,
4047 struct ib_uverbs_ex_destroy_wq_resp,
4048 reserved),
4049 UAPI_DEF_METHOD_NEEDS_FN(destroy_wq)),
4050 DECLARE_UVERBS_WRITE_EX(
4051 IB_USER_VERBS_EX_CMD_MODIFY_WQ,
4052 ib_uverbs_ex_modify_wq,
4053 UAPI_DEF_WRITE_I_EX(struct ib_uverbs_ex_modify_wq,
4054 curr_wq_state),
4055 UAPI_DEF_METHOD_NEEDS_FN(modify_wq))),
4056
4057 DECLARE_UVERBS_OBJECT(
4058 UVERBS_OBJECT_SRQ,
4059 DECLARE_UVERBS_WRITE(IB_USER_VERBS_CMD_CREATE_SRQ,
4060 ib_uverbs_create_srq,
4061 UAPI_DEF_WRITE_UDATA_IO(
4062 struct ib_uverbs_create_srq,
4063 struct ib_uverbs_create_srq_resp),
4064 UAPI_DEF_METHOD_NEEDS_FN(create_srq)),
4065 DECLARE_UVERBS_WRITE(IB_USER_VERBS_CMD_CREATE_XSRQ,
4066 ib_uverbs_create_xsrq,
4067 UAPI_DEF_WRITE_UDATA_IO(
4068 struct ib_uverbs_create_xsrq,
4069 struct ib_uverbs_create_srq_resp),
4070 UAPI_DEF_METHOD_NEEDS_FN(create_srq)),
4071 DECLARE_UVERBS_WRITE(
4072 IB_USER_VERBS_CMD_DESTROY_SRQ,
4073 ib_uverbs_destroy_srq,
4074 UAPI_DEF_WRITE_IO(struct ib_uverbs_destroy_srq,
4075 struct ib_uverbs_destroy_srq_resp),
4076 UAPI_DEF_METHOD_NEEDS_FN(destroy_srq)),
4077 DECLARE_UVERBS_WRITE(
4078 IB_USER_VERBS_CMD_MODIFY_SRQ,
4079 ib_uverbs_modify_srq,
4080 UAPI_DEF_WRITE_UDATA_I(struct ib_uverbs_modify_srq),
4081 UAPI_DEF_METHOD_NEEDS_FN(modify_srq)),
4082 DECLARE_UVERBS_WRITE(
4083 IB_USER_VERBS_CMD_POST_SRQ_RECV,
4084 ib_uverbs_post_srq_recv,
4085 UAPI_DEF_WRITE_IO(struct ib_uverbs_post_srq_recv,
4086 struct ib_uverbs_post_srq_recv_resp),
4087 UAPI_DEF_METHOD_NEEDS_FN(post_srq_recv)),
4088 DECLARE_UVERBS_WRITE(
4089 IB_USER_VERBS_CMD_QUERY_SRQ,
4090 ib_uverbs_query_srq,
4091 UAPI_DEF_WRITE_IO(struct ib_uverbs_query_srq,
4092 struct ib_uverbs_query_srq_resp),
4093 UAPI_DEF_METHOD_NEEDS_FN(query_srq))),
4094
4095 DECLARE_UVERBS_OBJECT(
4096 UVERBS_OBJECT_XRCD,
4097 DECLARE_UVERBS_WRITE(
4098 IB_USER_VERBS_CMD_CLOSE_XRCD,
4099 ib_uverbs_close_xrcd,
4100 UAPI_DEF_WRITE_I(struct ib_uverbs_close_xrcd),
4101 UAPI_DEF_METHOD_NEEDS_FN(dealloc_xrcd)),
4102 DECLARE_UVERBS_WRITE(IB_USER_VERBS_CMD_OPEN_QP,
4103 ib_uverbs_open_qp,
4104 UAPI_DEF_WRITE_UDATA_IO(
4105 struct ib_uverbs_open_qp,
4106 struct ib_uverbs_create_qp_resp)),
4107 DECLARE_UVERBS_WRITE(IB_USER_VERBS_CMD_OPEN_XRCD,
4108 ib_uverbs_open_xrcd,
4109 UAPI_DEF_WRITE_UDATA_IO(
4110 struct ib_uverbs_open_xrcd,
4111 struct ib_uverbs_open_xrcd_resp),
4112 UAPI_DEF_METHOD_NEEDS_FN(alloc_xrcd))),
4113
4114 {},
4115 };
Linux with added FPC-III support