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io_uring: ensure finish_wait() is always called in __io_uring_task_cancel()
[linux/fpc-iii.git] / drivers / infiniband / core / uverbs_cmd.c
blob98a5d36813ff78608a67b5041f1be1033accdf6c
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->device = ib_dev;
222 ucontext->ufile = ufile;
223 xa_init_flags(&ucontext->mmap_xa, XA_FLAGS_ALLOC);
224
225 rdma_restrack_new(&ucontext->res, RDMA_RESTRACK_CTX);
226 rdma_restrack_set_name(&ucontext->res, NULL);
227 attrs->context = ucontext;
228 return 0;
229 }
230
231 int ib_init_ucontext(struct uverbs_attr_bundle *attrs)
232 {
233 struct ib_ucontext *ucontext = attrs->context;
234 struct ib_uverbs_file *file = attrs->ufile;
235 int ret;
236
237 if (!down_read_trylock(&file->hw_destroy_rwsem))
238 return -EIO;
239 mutex_lock(&file->ucontext_lock);
240 if (file->ucontext) {
241 ret = -EINVAL;
242 goto err;
243 }
244
245 ret = ib_rdmacg_try_charge(&ucontext->cg_obj, ucontext->device,
246 RDMACG_RESOURCE_HCA_HANDLE);
247 if (ret)
248 goto err;
249
250 ret = ucontext->device->ops.alloc_ucontext(ucontext,
251 &attrs->driver_udata);
252 if (ret)
253 goto err_uncharge;
254
255 rdma_restrack_add(&ucontext->res);
256
257 /*
258 * Make sure that ib_uverbs_get_ucontext() sees the pointer update
259 * only after all writes to setup the ucontext have completed
260 */
261 smp_store_release(&file->ucontext, ucontext);
262
263 mutex_unlock(&file->ucontext_lock);
264 up_read(&file->hw_destroy_rwsem);
265 return 0;
266
267 err_uncharge:
268 ib_rdmacg_uncharge(&ucontext->cg_obj, ucontext->device,
269 RDMACG_RESOURCE_HCA_HANDLE);
270 err:
271 mutex_unlock(&file->ucontext_lock);
272 up_read(&file->hw_destroy_rwsem);
273 return ret;
274 }
275
276 static int ib_uverbs_get_context(struct uverbs_attr_bundle *attrs)
277 {
278 struct ib_uverbs_get_context_resp resp;
279 struct ib_uverbs_get_context cmd;
280 struct ib_device *ib_dev;
281 struct ib_uobject *uobj;
282 int ret;
283
284 ret = uverbs_request(attrs, &cmd, sizeof(cmd));
285 if (ret)
286 return ret;
287
288 ret = ib_alloc_ucontext(attrs);
289 if (ret)
290 return ret;
291
292 uobj = uobj_alloc(UVERBS_OBJECT_ASYNC_EVENT, attrs, &ib_dev);
293 if (IS_ERR(uobj)) {
294 ret = PTR_ERR(uobj);
295 goto err_ucontext;
296 }
297
298 resp = (struct ib_uverbs_get_context_resp){
299 .num_comp_vectors = attrs->ufile->device->num_comp_vectors,
300 .async_fd = uobj->id,
301 };
302 ret = uverbs_response(attrs, &resp, sizeof(resp));
303 if (ret)
304 goto err_uobj;
305
306 ret = ib_init_ucontext(attrs);
307 if (ret)
308 goto err_uobj;
309
310 ib_uverbs_init_async_event_file(
311 container_of(uobj, struct ib_uverbs_async_event_file, uobj));
312 rdma_alloc_commit_uobject(uobj, attrs);
313 return 0;
314
315 err_uobj:
316 rdma_alloc_abort_uobject(uobj, attrs, false);
317 err_ucontext:
318 rdma_restrack_put(&attrs->context->res);
319 kfree(attrs->context);
320 attrs->context = NULL;
321 return ret;
322 }
323
324 static void copy_query_dev_fields(struct ib_ucontext *ucontext,
325 struct ib_uverbs_query_device_resp *resp,
326 struct ib_device_attr *attr)
327 {
328 struct ib_device *ib_dev = ucontext->device;
329
330 resp->fw_ver = attr->fw_ver;
331 resp->node_guid = ib_dev->node_guid;
332 resp->sys_image_guid = attr->sys_image_guid;
333 resp->max_mr_size = attr->max_mr_size;
334 resp->page_size_cap = attr->page_size_cap;
335 resp->vendor_id = attr->vendor_id;
336 resp->vendor_part_id = attr->vendor_part_id;
337 resp->hw_ver = attr->hw_ver;
338 resp->max_qp = attr->max_qp;
339 resp->max_qp_wr = attr->max_qp_wr;
340 resp->device_cap_flags = lower_32_bits(attr->device_cap_flags);
341 resp->max_sge = min(attr->max_send_sge, attr->max_recv_sge);
342 resp->max_sge_rd = attr->max_sge_rd;
343 resp->max_cq = attr->max_cq;
344 resp->max_cqe = attr->max_cqe;
345 resp->max_mr = attr->max_mr;
346 resp->max_pd = attr->max_pd;
347 resp->max_qp_rd_atom = attr->max_qp_rd_atom;
348 resp->max_ee_rd_atom = attr->max_ee_rd_atom;
349 resp->max_res_rd_atom = attr->max_res_rd_atom;
350 resp->max_qp_init_rd_atom = attr->max_qp_init_rd_atom;
351 resp->max_ee_init_rd_atom = attr->max_ee_init_rd_atom;
352 resp->atomic_cap = attr->atomic_cap;
353 resp->max_ee = attr->max_ee;
354 resp->max_rdd = attr->max_rdd;
355 resp->max_mw = attr->max_mw;
356 resp->max_raw_ipv6_qp = attr->max_raw_ipv6_qp;
357 resp->max_raw_ethy_qp = attr->max_raw_ethy_qp;
358 resp->max_mcast_grp = attr->max_mcast_grp;
359 resp->max_mcast_qp_attach = attr->max_mcast_qp_attach;
360 resp->max_total_mcast_qp_attach = attr->max_total_mcast_qp_attach;
361 resp->max_ah = attr->max_ah;
362 resp->max_srq = attr->max_srq;
363 resp->max_srq_wr = attr->max_srq_wr;
364 resp->max_srq_sge = attr->max_srq_sge;
365 resp->max_pkeys = attr->max_pkeys;
366 resp->local_ca_ack_delay = attr->local_ca_ack_delay;
367 resp->phys_port_cnt = ib_dev->phys_port_cnt;
368 }
369
370 static int ib_uverbs_query_device(struct uverbs_attr_bundle *attrs)
371 {
372 struct ib_uverbs_query_device cmd;
373 struct ib_uverbs_query_device_resp resp;
374 struct ib_ucontext *ucontext;
375 int ret;
376
377 ucontext = ib_uverbs_get_ucontext(attrs);
378 if (IS_ERR(ucontext))
379 return PTR_ERR(ucontext);
380
381 ret = uverbs_request(attrs, &cmd, sizeof(cmd));
382 if (ret)
383 return ret;
384
385 memset(&resp, 0, sizeof resp);
386 copy_query_dev_fields(ucontext, &resp, &ucontext->device->attrs);
387
388 return uverbs_response(attrs, &resp, sizeof(resp));
389 }
390
391 static int ib_uverbs_query_port(struct uverbs_attr_bundle *attrs)
392 {
393 struct ib_uverbs_query_port cmd;
394 struct ib_uverbs_query_port_resp resp;
395 struct ib_port_attr attr;
396 int ret;
397 struct ib_ucontext *ucontext;
398 struct ib_device *ib_dev;
399
400 ucontext = ib_uverbs_get_ucontext(attrs);
401 if (IS_ERR(ucontext))
402 return PTR_ERR(ucontext);
403 ib_dev = ucontext->device;
404
405 ret = uverbs_request(attrs, &cmd, sizeof(cmd));
406 if (ret)
407 return ret;
408
409 ret = ib_query_port(ib_dev, cmd.port_num, &attr);
410 if (ret)
411 return ret;
412
413 memset(&resp, 0, sizeof resp);
414 copy_port_attr_to_resp(&attr, &resp, ib_dev, cmd.port_num);
415
416 return uverbs_response(attrs, &resp, sizeof(resp));
417 }
418
419 static int ib_uverbs_alloc_pd(struct uverbs_attr_bundle *attrs)
420 {
421 struct ib_uverbs_alloc_pd_resp resp = {};
422 struct ib_uverbs_alloc_pd cmd;
423 struct ib_uobject *uobj;
424 struct ib_pd *pd;
425 int ret;
426 struct ib_device *ib_dev;
427
428 ret = uverbs_request(attrs, &cmd, sizeof(cmd));
429 if (ret)
430 return ret;
431
432 uobj = uobj_alloc(UVERBS_OBJECT_PD, attrs, &ib_dev);
433 if (IS_ERR(uobj))
434 return PTR_ERR(uobj);
435
436 pd = rdma_zalloc_drv_obj(ib_dev, ib_pd);
437 if (!pd) {
438 ret = -ENOMEM;
439 goto err;
440 }
441
442 pd->device = ib_dev;
443 pd->uobject = uobj;
444 atomic_set(&pd->usecnt, 0);
445
446 rdma_restrack_new(&pd->res, RDMA_RESTRACK_PD);
447 rdma_restrack_set_name(&pd->res, NULL);
448
449 ret = ib_dev->ops.alloc_pd(pd, &attrs->driver_udata);
450 if (ret)
451 goto err_alloc;
452 rdma_restrack_add(&pd->res);
453
454 uobj->object = pd;
455 uobj_finalize_uobj_create(uobj, attrs);
456
457 resp.pd_handle = uobj->id;
458 return uverbs_response(attrs, &resp, sizeof(resp));
459
460 err_alloc:
461 rdma_restrack_put(&pd->res);
462 kfree(pd);
463 err:
464 uobj_alloc_abort(uobj, attrs);
465 return ret;
466 }
467
468 static int ib_uverbs_dealloc_pd(struct uverbs_attr_bundle *attrs)
469 {
470 struct ib_uverbs_dealloc_pd cmd;
471 int ret;
472
473 ret = uverbs_request(attrs, &cmd, sizeof(cmd));
474 if (ret)
475 return ret;
476
477 return uobj_perform_destroy(UVERBS_OBJECT_PD, cmd.pd_handle, attrs);
478 }
479
480 struct xrcd_table_entry {
481 struct rb_node node;
482 struct ib_xrcd *xrcd;
483 struct inode *inode;
484 };
485
486 static int xrcd_table_insert(struct ib_uverbs_device *dev,
487 struct inode *inode,
488 struct ib_xrcd *xrcd)
489 {
490 struct xrcd_table_entry *entry, *scan;
491 struct rb_node **p = &dev->xrcd_tree.rb_node;
492 struct rb_node *parent = NULL;
493
494 entry = kmalloc(sizeof *entry, GFP_KERNEL);
495 if (!entry)
496 return -ENOMEM;
497
498 entry->xrcd = xrcd;
499 entry->inode = inode;
500
501 while (*p) {
502 parent = *p;
503 scan = rb_entry(parent, struct xrcd_table_entry, node);
504
505 if (inode < scan->inode) {
506 p = &(*p)->rb_left;
507 } else if (inode > scan->inode) {
508 p = &(*p)->rb_right;
509 } else {
510 kfree(entry);
511 return -EEXIST;
512 }
513 }
514
515 rb_link_node(&entry->node, parent, p);
516 rb_insert_color(&entry->node, &dev->xrcd_tree);
517 igrab(inode);
518 return 0;
519 }
520
521 static struct xrcd_table_entry *xrcd_table_search(struct ib_uverbs_device *dev,
522 struct inode *inode)
523 {
524 struct xrcd_table_entry *entry;
525 struct rb_node *p = dev->xrcd_tree.rb_node;
526
527 while (p) {
528 entry = rb_entry(p, struct xrcd_table_entry, node);
529
530 if (inode < entry->inode)
531 p = p->rb_left;
532 else if (inode > entry->inode)
533 p = p->rb_right;
534 else
535 return entry;
536 }
537
538 return NULL;
539 }
540
541 static struct ib_xrcd *find_xrcd(struct ib_uverbs_device *dev, struct inode *inode)
542 {
543 struct xrcd_table_entry *entry;
544
545 entry = xrcd_table_search(dev, inode);
546 if (!entry)
547 return NULL;
548
549 return entry->xrcd;
550 }
551
552 static void xrcd_table_delete(struct ib_uverbs_device *dev,
553 struct inode *inode)
554 {
555 struct xrcd_table_entry *entry;
556
557 entry = xrcd_table_search(dev, inode);
558 if (entry) {
559 iput(inode);
560 rb_erase(&entry->node, &dev->xrcd_tree);
561 kfree(entry);
562 }
563 }
564
565 static int ib_uverbs_open_xrcd(struct uverbs_attr_bundle *attrs)
566 {
567 struct ib_uverbs_device *ibudev = attrs->ufile->device;
568 struct ib_uverbs_open_xrcd_resp resp = {};
569 struct ib_uverbs_open_xrcd cmd;
570 struct ib_uxrcd_object *obj;
571 struct ib_xrcd *xrcd = NULL;
572 struct inode *inode = NULL;
573 int new_xrcd = 0;
574 struct ib_device *ib_dev;
575 struct fd f = {};
576 int ret;
577
578 ret = uverbs_request(attrs, &cmd, sizeof(cmd));
579 if (ret)
580 return ret;
581
582 mutex_lock(&ibudev->xrcd_tree_mutex);
583
584 if (cmd.fd != -1) {
585 /* search for file descriptor */
586 f = fdget(cmd.fd);
587 if (!f.file) {
588 ret = -EBADF;
589 goto err_tree_mutex_unlock;
590 }
591
592 inode = file_inode(f.file);
593 xrcd = find_xrcd(ibudev, inode);
594 if (!xrcd && !(cmd.oflags & O_CREAT)) {
595 /* no file descriptor. Need CREATE flag */
596 ret = -EAGAIN;
597 goto err_tree_mutex_unlock;
598 }
599
600 if (xrcd && cmd.oflags & O_EXCL) {
601 ret = -EINVAL;
602 goto err_tree_mutex_unlock;
603 }
604 }
605
606 obj = (struct ib_uxrcd_object *)uobj_alloc(UVERBS_OBJECT_XRCD, attrs,
607 &ib_dev);
608 if (IS_ERR(obj)) {
609 ret = PTR_ERR(obj);
610 goto err_tree_mutex_unlock;
611 }
612
613 if (!xrcd) {
614 xrcd = ib_alloc_xrcd_user(ib_dev, inode, &attrs->driver_udata);
615 if (IS_ERR(xrcd)) {
616 ret = PTR_ERR(xrcd);
617 goto err;
618 }
619 new_xrcd = 1;
620 }
621
622 atomic_set(&obj->refcnt, 0);
623 obj->uobject.object = xrcd;
624
625 if (inode) {
626 if (new_xrcd) {
627 /* create new inode/xrcd table entry */
628 ret = xrcd_table_insert(ibudev, inode, xrcd);
629 if (ret)
630 goto err_dealloc_xrcd;
631 }
632 atomic_inc(&xrcd->usecnt);
633 }
634
635 if (f.file)
636 fdput(f);
637
638 mutex_unlock(&ibudev->xrcd_tree_mutex);
639 uobj_finalize_uobj_create(&obj->uobject, attrs);
640
641 resp.xrcd_handle = obj->uobject.id;
642 return uverbs_response(attrs, &resp, sizeof(resp));
643
644 err_dealloc_xrcd:
645 ib_dealloc_xrcd_user(xrcd, uverbs_get_cleared_udata(attrs));
646
647 err:
648 uobj_alloc_abort(&obj->uobject, attrs);
649
650 err_tree_mutex_unlock:
651 if (f.file)
652 fdput(f);
653
654 mutex_unlock(&ibudev->xrcd_tree_mutex);
655
656 return ret;
657 }
658
659 static int ib_uverbs_close_xrcd(struct uverbs_attr_bundle *attrs)
660 {
661 struct ib_uverbs_close_xrcd cmd;
662 int ret;
663
664 ret = uverbs_request(attrs, &cmd, sizeof(cmd));
665 if (ret)
666 return ret;
667
668 return uobj_perform_destroy(UVERBS_OBJECT_XRCD, cmd.xrcd_handle, attrs);
669 }
670
671 int ib_uverbs_dealloc_xrcd(struct ib_uobject *uobject, struct ib_xrcd *xrcd,
672 enum rdma_remove_reason why,
673 struct uverbs_attr_bundle *attrs)
674 {
675 struct inode *inode;
676 int ret;
677 struct ib_uverbs_device *dev = attrs->ufile->device;
678
679 inode = xrcd->inode;
680 if (inode && !atomic_dec_and_test(&xrcd->usecnt))
681 return 0;
682
683 ret = ib_dealloc_xrcd_user(xrcd, &attrs->driver_udata);
684 if (ret) {
685 atomic_inc(&xrcd->usecnt);
686 return ret;
687 }
688
689 if (inode)
690 xrcd_table_delete(dev, inode);
691
692 return 0;
693 }
694
695 static int ib_uverbs_reg_mr(struct uverbs_attr_bundle *attrs)
696 {
697 struct ib_uverbs_reg_mr_resp resp = {};
698 struct ib_uverbs_reg_mr cmd;
699 struct ib_uobject *uobj;
700 struct ib_pd *pd;
701 struct ib_mr *mr;
702 int ret;
703 struct ib_device *ib_dev;
704
705 ret = uverbs_request(attrs, &cmd, sizeof(cmd));
706 if (ret)
707 return ret;
708
709 if ((cmd.start & ~PAGE_MASK) != (cmd.hca_va & ~PAGE_MASK))
710 return -EINVAL;
711
712 uobj = uobj_alloc(UVERBS_OBJECT_MR, attrs, &ib_dev);
713 if (IS_ERR(uobj))
714 return PTR_ERR(uobj);
715
716 ret = ib_check_mr_access(ib_dev, cmd.access_flags);
717 if (ret)
718 goto err_free;
719
720 pd = uobj_get_obj_read(pd, UVERBS_OBJECT_PD, cmd.pd_handle, attrs);
721 if (!pd) {
722 ret = -EINVAL;
723 goto err_free;
724 }
725
726 mr = pd->device->ops.reg_user_mr(pd, cmd.start, cmd.length, cmd.hca_va,
727 cmd.access_flags,
728 &attrs->driver_udata);
729 if (IS_ERR(mr)) {
730 ret = PTR_ERR(mr);
731 goto err_put;
732 }
733
734 mr->device = pd->device;
735 mr->pd = pd;
736 mr->type = IB_MR_TYPE_USER;
737 mr->dm = NULL;
738 mr->sig_attrs = NULL;
739 mr->uobject = uobj;
740 atomic_inc(&pd->usecnt);
741 mr->iova = cmd.hca_va;
742
743 rdma_restrack_new(&mr->res, RDMA_RESTRACK_MR);
744 rdma_restrack_set_name(&mr->res, NULL);
745 rdma_restrack_add(&mr->res);
746
747 uobj->object = mr;
748 uobj_put_obj_read(pd);
749 uobj_finalize_uobj_create(uobj, attrs);
750
751 resp.lkey = mr->lkey;
752 resp.rkey = mr->rkey;
753 resp.mr_handle = uobj->id;
754 return uverbs_response(attrs, &resp, sizeof(resp));
755
756 err_put:
757 uobj_put_obj_read(pd);
758 err_free:
759 uobj_alloc_abort(uobj, attrs);
760 return ret;
761 }
762
763 static int ib_uverbs_rereg_mr(struct uverbs_attr_bundle *attrs)
764 {
765 struct ib_uverbs_rereg_mr cmd;
766 struct ib_uverbs_rereg_mr_resp resp;
767 struct ib_mr *mr;
768 int ret;
769 struct ib_uobject *uobj;
770 struct ib_uobject *new_uobj;
771 struct ib_device *ib_dev;
772 struct ib_pd *orig_pd;
773 struct ib_pd *new_pd;
774 struct ib_mr *new_mr;
775
776 ret = uverbs_request(attrs, &cmd, sizeof(cmd));
777 if (ret)
778 return ret;
779
780 if (!cmd.flags)
781 return -EINVAL;
782
783 if (cmd.flags & ~IB_MR_REREG_SUPPORTED)
784 return -EOPNOTSUPP;
785
786 if ((cmd.flags & IB_MR_REREG_TRANS) &&
787 (cmd.start & ~PAGE_MASK) != (cmd.hca_va & ~PAGE_MASK))
788 return -EINVAL;
789
790 uobj = uobj_get_write(UVERBS_OBJECT_MR, cmd.mr_handle, attrs);
791 if (IS_ERR(uobj))
792 return PTR_ERR(uobj);
793
794 mr = uobj->object;
795
796 if (mr->dm) {
797 ret = -EINVAL;
798 goto put_uobjs;
799 }
800
801 if (cmd.flags & IB_MR_REREG_ACCESS) {
802 ret = ib_check_mr_access(mr->device, cmd.access_flags);
803 if (ret)
804 goto put_uobjs;
805 }
806
807 orig_pd = mr->pd;
808 if (cmd.flags & IB_MR_REREG_PD) {
809 new_pd = uobj_get_obj_read(pd, UVERBS_OBJECT_PD, cmd.pd_handle,
810 attrs);
811 if (!new_pd) {
812 ret = -EINVAL;
813 goto put_uobjs;
814 }
815 } else {
816 new_pd = mr->pd;
817 }
818
819 /*
820 * The driver might create a new HW object as part of the rereg, we need
821 * to have a uobject ready to hold it.
822 */
823 new_uobj = uobj_alloc(UVERBS_OBJECT_MR, attrs, &ib_dev);
824 if (IS_ERR(new_uobj)) {
825 ret = PTR_ERR(new_uobj);
826 goto put_uobj_pd;
827 }
828
829 new_mr = ib_dev->ops.rereg_user_mr(mr, cmd.flags, cmd.start, cmd.length,
830 cmd.hca_va, cmd.access_flags, new_pd,
831 &attrs->driver_udata);
832 if (IS_ERR(new_mr)) {
833 ret = PTR_ERR(new_mr);
834 goto put_new_uobj;
835 }
836 if (new_mr) {
837 new_mr->device = new_pd->device;
838 new_mr->pd = new_pd;
839 new_mr->type = IB_MR_TYPE_USER;
840 new_mr->dm = NULL;
841 new_mr->sig_attrs = NULL;
842 new_mr->uobject = uobj;
843 atomic_inc(&new_pd->usecnt);
844 new_mr->iova = cmd.hca_va;
845 new_uobj->object = new_mr;
846
847 rdma_restrack_new(&new_mr->res, RDMA_RESTRACK_MR);
848 rdma_restrack_set_name(&new_mr->res, NULL);
849 rdma_restrack_add(&new_mr->res);
850
851 /*
852 * The new uobj for the new HW object is put into the same spot
853 * in the IDR and the old uobj & HW object is deleted.
854 */
855 rdma_assign_uobject(uobj, new_uobj, attrs);
856 rdma_alloc_commit_uobject(new_uobj, attrs);
857 uobj_put_destroy(uobj);
858 new_uobj = NULL;
859 uobj = NULL;
860 mr = new_mr;
861 } else {
862 if (cmd.flags & IB_MR_REREG_PD) {
863 atomic_dec(&orig_pd->usecnt);
864 mr->pd = new_pd;
865 atomic_inc(&new_pd->usecnt);
866 }
867 if (cmd.flags & IB_MR_REREG_TRANS)
868 mr->iova = cmd.hca_va;
869 }
870
871 memset(&resp, 0, sizeof(resp));
872 resp.lkey = mr->lkey;
873 resp.rkey = mr->rkey;
874
875 ret = uverbs_response(attrs, &resp, sizeof(resp));
876
877 put_new_uobj:
878 if (new_uobj)
879 uobj_alloc_abort(new_uobj, attrs);
880 put_uobj_pd:
881 if (cmd.flags & IB_MR_REREG_PD)
882 uobj_put_obj_read(new_pd);
883
884 put_uobjs:
885 if (uobj)
886 uobj_put_write(uobj);
887
888 return ret;
889 }
890
891 static int ib_uverbs_dereg_mr(struct uverbs_attr_bundle *attrs)
892 {
893 struct ib_uverbs_dereg_mr cmd;
894 int ret;
895
896 ret = uverbs_request(attrs, &cmd, sizeof(cmd));
897 if (ret)
898 return ret;
899
900 return uobj_perform_destroy(UVERBS_OBJECT_MR, cmd.mr_handle, attrs);
901 }
902
903 static int ib_uverbs_alloc_mw(struct uverbs_attr_bundle *attrs)
904 {
905 struct ib_uverbs_alloc_mw cmd;
906 struct ib_uverbs_alloc_mw_resp resp = {};
907 struct ib_uobject *uobj;
908 struct ib_pd *pd;
909 struct ib_mw *mw;
910 int ret;
911 struct ib_device *ib_dev;
912
913 ret = uverbs_request(attrs, &cmd, sizeof(cmd));
914 if (ret)
915 return ret;
916
917 uobj = uobj_alloc(UVERBS_OBJECT_MW, attrs, &ib_dev);
918 if (IS_ERR(uobj))
919 return PTR_ERR(uobj);
920
921 pd = uobj_get_obj_read(pd, UVERBS_OBJECT_PD, cmd.pd_handle, attrs);
922 if (!pd) {
923 ret = -EINVAL;
924 goto err_free;
925 }
926
927 if (cmd.mw_type != IB_MW_TYPE_1 && cmd.mw_type != IB_MW_TYPE_2) {
928 ret = -EINVAL;
929 goto err_put;
930 }
931
932 mw = rdma_zalloc_drv_obj(ib_dev, ib_mw);
933 if (!mw) {
934 ret = -ENOMEM;
935 goto err_put;
936 }
937
938 mw->device = ib_dev;
939 mw->pd = pd;
940 mw->uobject = uobj;
941 mw->type = cmd.mw_type;
942
943 ret = pd->device->ops.alloc_mw(mw, &attrs->driver_udata);
944 if (ret)
945 goto err_alloc;
946
947 atomic_inc(&pd->usecnt);
948
949 uobj->object = mw;
950 uobj_put_obj_read(pd);
951 uobj_finalize_uobj_create(uobj, attrs);
952
953 resp.rkey = mw->rkey;
954 resp.mw_handle = uobj->id;
955 return uverbs_response(attrs, &resp, sizeof(resp));
956
957 err_alloc:
958 kfree(mw);
959 err_put:
960 uobj_put_obj_read(pd);
961 err_free:
962 uobj_alloc_abort(uobj, attrs);
963 return ret;
964 }
965
966 static int ib_uverbs_dealloc_mw(struct uverbs_attr_bundle *attrs)
967 {
968 struct ib_uverbs_dealloc_mw cmd;
969 int ret;
970
971 ret = uverbs_request(attrs, &cmd, sizeof(cmd));
972 if (ret)
973 return ret;
974
975 return uobj_perform_destroy(UVERBS_OBJECT_MW, cmd.mw_handle, attrs);
976 }
977
978 static int ib_uverbs_create_comp_channel(struct uverbs_attr_bundle *attrs)
979 {
980 struct ib_uverbs_create_comp_channel cmd;
981 struct ib_uverbs_create_comp_channel_resp resp;
982 struct ib_uobject *uobj;
983 struct ib_uverbs_completion_event_file *ev_file;
984 struct ib_device *ib_dev;
985 int ret;
986
987 ret = uverbs_request(attrs, &cmd, sizeof(cmd));
988 if (ret)
989 return ret;
990
991 uobj = uobj_alloc(UVERBS_OBJECT_COMP_CHANNEL, attrs, &ib_dev);
992 if (IS_ERR(uobj))
993 return PTR_ERR(uobj);
994
995 ev_file = container_of(uobj, struct ib_uverbs_completion_event_file,
996 uobj);
997 ib_uverbs_init_event_queue(&ev_file->ev_queue);
998 uobj_finalize_uobj_create(uobj, attrs);
999
1000 resp.fd = uobj->id;
1001 return uverbs_response(attrs, &resp, sizeof(resp));
1002 }
1003
1004 static int create_cq(struct uverbs_attr_bundle *attrs,
1005 struct ib_uverbs_ex_create_cq *cmd)
1006 {
1007 struct ib_ucq_object *obj;
1008 struct ib_uverbs_completion_event_file *ev_file = NULL;
1009 struct ib_cq *cq;
1010 int ret;
1011 struct ib_uverbs_ex_create_cq_resp resp = {};
1012 struct ib_cq_init_attr attr = {};
1013 struct ib_device *ib_dev;
1014
1015 if (cmd->comp_vector >= attrs->ufile->device->num_comp_vectors)
1016 return -EINVAL;
1017
1018 obj = (struct ib_ucq_object *)uobj_alloc(UVERBS_OBJECT_CQ, attrs,
1019 &ib_dev);
1020 if (IS_ERR(obj))
1021 return PTR_ERR(obj);
1022
1023 if (cmd->comp_channel >= 0) {
1024 ev_file = ib_uverbs_lookup_comp_file(cmd->comp_channel, attrs);
1025 if (IS_ERR(ev_file)) {
1026 ret = PTR_ERR(ev_file);
1027 goto err;
1028 }
1029 }
1030
1031 obj->uevent.uobject.user_handle = cmd->user_handle;
1032 INIT_LIST_HEAD(&obj->comp_list);
1033 INIT_LIST_HEAD(&obj->uevent.event_list);
1034
1035 attr.cqe = cmd->cqe;
1036 attr.comp_vector = cmd->comp_vector;
1037 attr.flags = cmd->flags;
1038
1039 cq = rdma_zalloc_drv_obj(ib_dev, ib_cq);
1040 if (!cq) {
1041 ret = -ENOMEM;
1042 goto err_file;
1043 }
1044 cq->device = ib_dev;
1045 cq->uobject = obj;
1046 cq->comp_handler = ib_uverbs_comp_handler;
1047 cq->event_handler = ib_uverbs_cq_event_handler;
1048 cq->cq_context = ev_file ? &ev_file->ev_queue : NULL;
1049 atomic_set(&cq->usecnt, 0);
1050
1051 rdma_restrack_new(&cq->res, RDMA_RESTRACK_CQ);
1052 rdma_restrack_set_name(&cq->res, NULL);
1053
1054 ret = ib_dev->ops.create_cq(cq, &attr, &attrs->driver_udata);
1055 if (ret)
1056 goto err_free;
1057 rdma_restrack_add(&cq->res);
1058
1059 obj->uevent.uobject.object = cq;
1060 obj->uevent.event_file = READ_ONCE(attrs->ufile->default_async_file);
1061 if (obj->uevent.event_file)
1062 uverbs_uobject_get(&obj->uevent.event_file->uobj);
1063 uobj_finalize_uobj_create(&obj->uevent.uobject, attrs);
1064
1065 resp.base.cq_handle = obj->uevent.uobject.id;
1066 resp.base.cqe = cq->cqe;
1067 resp.response_length = uverbs_response_length(attrs, sizeof(resp));
1068 return uverbs_response(attrs, &resp, sizeof(resp));
1069
1070 err_free:
1071 rdma_restrack_put(&cq->res);
1072 kfree(cq);
1073 err_file:
1074 if (ev_file)
1075 ib_uverbs_release_ucq(ev_file, obj);
1076 err:
1077 uobj_alloc_abort(&obj->uevent.uobject, attrs);
1078 return ret;
1079 }
1080
1081 static int ib_uverbs_create_cq(struct uverbs_attr_bundle *attrs)
1082 {
1083 struct ib_uverbs_create_cq cmd;
1084 struct ib_uverbs_ex_create_cq cmd_ex;
1085 int ret;
1086
1087 ret = uverbs_request(attrs, &cmd, sizeof(cmd));
1088 if (ret)
1089 return ret;
1090
1091 memset(&cmd_ex, 0, sizeof(cmd_ex));
1092 cmd_ex.user_handle = cmd.user_handle;
1093 cmd_ex.cqe = cmd.cqe;
1094 cmd_ex.comp_vector = cmd.comp_vector;
1095 cmd_ex.comp_channel = cmd.comp_channel;
1096
1097 return create_cq(attrs, &cmd_ex);
1098 }
1099
1100 static int ib_uverbs_ex_create_cq(struct uverbs_attr_bundle *attrs)
1101 {
1102 struct ib_uverbs_ex_create_cq cmd;
1103 int ret;
1104
1105 ret = uverbs_request(attrs, &cmd, sizeof(cmd));
1106 if (ret)
1107 return ret;
1108
1109 if (cmd.comp_mask)
1110 return -EINVAL;
1111
1112 if (cmd.reserved)
1113 return -EINVAL;
1114
1115 return create_cq(attrs, &cmd);
1116 }
1117
1118 static int ib_uverbs_resize_cq(struct uverbs_attr_bundle *attrs)
1119 {
1120 struct ib_uverbs_resize_cq cmd;
1121 struct ib_uverbs_resize_cq_resp resp = {};
1122 struct ib_cq *cq;
1123 int ret;
1124
1125 ret = uverbs_request(attrs, &cmd, sizeof(cmd));
1126 if (ret)
1127 return ret;
1128
1129 cq = uobj_get_obj_read(cq, UVERBS_OBJECT_CQ, cmd.cq_handle, attrs);
1130 if (!cq)
1131 return -EINVAL;
1132
1133 ret = cq->device->ops.resize_cq(cq, cmd.cqe, &attrs->driver_udata);
1134 if (ret)
1135 goto out;
1136
1137 resp.cqe = cq->cqe;
1138
1139 ret = uverbs_response(attrs, &resp, sizeof(resp));
1140 out:
1141 rdma_lookup_put_uobject(&cq->uobject->uevent.uobject,
1142 UVERBS_LOOKUP_READ);
1143
1144 return ret;
1145 }
1146
1147 static int copy_wc_to_user(struct ib_device *ib_dev, void __user *dest,
1148 struct ib_wc *wc)
1149 {
1150 struct ib_uverbs_wc tmp;
1151
1152 tmp.wr_id = wc->wr_id;
1153 tmp.status = wc->status;
1154 tmp.opcode = wc->opcode;
1155 tmp.vendor_err = wc->vendor_err;
1156 tmp.byte_len = wc->byte_len;
1157 tmp.ex.imm_data = wc->ex.imm_data;
1158 tmp.qp_num = wc->qp->qp_num;
1159 tmp.src_qp = wc->src_qp;
1160 tmp.wc_flags = wc->wc_flags;
1161 tmp.pkey_index = wc->pkey_index;
1162 if (rdma_cap_opa_ah(ib_dev, wc->port_num))
1163 tmp.slid = OPA_TO_IB_UCAST_LID(wc->slid);
1164 else
1165 tmp.slid = ib_lid_cpu16(wc->slid);
1166 tmp.sl = wc->sl;
1167 tmp.dlid_path_bits = wc->dlid_path_bits;
1168 tmp.port_num = wc->port_num;
1169 tmp.reserved = 0;
1170
1171 if (copy_to_user(dest, &tmp, sizeof tmp))
1172 return -EFAULT;
1173
1174 return 0;
1175 }
1176
1177 static int ib_uverbs_poll_cq(struct uverbs_attr_bundle *attrs)
1178 {
1179 struct ib_uverbs_poll_cq cmd;
1180 struct ib_uverbs_poll_cq_resp resp;
1181 u8 __user *header_ptr;
1182 u8 __user *data_ptr;
1183 struct ib_cq *cq;
1184 struct ib_wc wc;
1185 int ret;
1186
1187 ret = uverbs_request(attrs, &cmd, sizeof(cmd));
1188 if (ret)
1189 return ret;
1190
1191 cq = uobj_get_obj_read(cq, UVERBS_OBJECT_CQ, cmd.cq_handle, attrs);
1192 if (!cq)
1193 return -EINVAL;
1194
1195 /* we copy a struct ib_uverbs_poll_cq_resp to user space */
1196 header_ptr = attrs->ucore.outbuf;
1197 data_ptr = header_ptr + sizeof resp;
1198
1199 memset(&resp, 0, sizeof resp);
1200 while (resp.count < cmd.ne) {
1201 ret = ib_poll_cq(cq, 1, &wc);
1202 if (ret < 0)
1203 goto out_put;
1204 if (!ret)
1205 break;
1206
1207 ret = copy_wc_to_user(cq->device, data_ptr, &wc);
1208 if (ret)
1209 goto out_put;
1210
1211 data_ptr += sizeof(struct ib_uverbs_wc);
1212 ++resp.count;
1213 }
1214
1215 if (copy_to_user(header_ptr, &resp, sizeof resp)) {
1216 ret = -EFAULT;
1217 goto out_put;
1218 }
1219 ret = 0;
1220
1221 if (uverbs_attr_is_valid(attrs, UVERBS_ATTR_CORE_OUT))
1222 ret = uverbs_output_written(attrs, UVERBS_ATTR_CORE_OUT);
1223
1224 out_put:
1225 rdma_lookup_put_uobject(&cq->uobject->uevent.uobject,
1226 UVERBS_LOOKUP_READ);
1227 return ret;
1228 }
1229
1230 static int ib_uverbs_req_notify_cq(struct uverbs_attr_bundle *attrs)
1231 {
1232 struct ib_uverbs_req_notify_cq cmd;
1233 struct ib_cq *cq;
1234 int ret;
1235
1236 ret = uverbs_request(attrs, &cmd, sizeof(cmd));
1237 if (ret)
1238 return ret;
1239
1240 cq = uobj_get_obj_read(cq, UVERBS_OBJECT_CQ, cmd.cq_handle, attrs);
1241 if (!cq)
1242 return -EINVAL;
1243
1244 ib_req_notify_cq(cq, cmd.solicited_only ?
1245 IB_CQ_SOLICITED : IB_CQ_NEXT_COMP);
1246
1247 rdma_lookup_put_uobject(&cq->uobject->uevent.uobject,
1248 UVERBS_LOOKUP_READ);
1249 return 0;
1250 }
1251
1252 static int ib_uverbs_destroy_cq(struct uverbs_attr_bundle *attrs)
1253 {
1254 struct ib_uverbs_destroy_cq cmd;
1255 struct ib_uverbs_destroy_cq_resp resp;
1256 struct ib_uobject *uobj;
1257 struct ib_ucq_object *obj;
1258 int ret;
1259
1260 ret = uverbs_request(attrs, &cmd, sizeof(cmd));
1261 if (ret)
1262 return ret;
1263
1264 uobj = uobj_get_destroy(UVERBS_OBJECT_CQ, cmd.cq_handle, attrs);
1265 if (IS_ERR(uobj))
1266 return PTR_ERR(uobj);
1267
1268 obj = container_of(uobj, struct ib_ucq_object, uevent.uobject);
1269 memset(&resp, 0, sizeof(resp));
1270 resp.comp_events_reported = obj->comp_events_reported;
1271 resp.async_events_reported = obj->uevent.events_reported;
1272
1273 uobj_put_destroy(uobj);
1274
1275 return uverbs_response(attrs, &resp, sizeof(resp));
1276 }
1277
1278 static int create_qp(struct uverbs_attr_bundle *attrs,
1279 struct ib_uverbs_ex_create_qp *cmd)
1280 {
1281 struct ib_uqp_object *obj;
1282 struct ib_device *device;
1283 struct ib_pd *pd = NULL;
1284 struct ib_xrcd *xrcd = NULL;
1285 struct ib_uobject *xrcd_uobj = ERR_PTR(-ENOENT);
1286 struct ib_cq *scq = NULL, *rcq = NULL;
1287 struct ib_srq *srq = NULL;
1288 struct ib_qp *qp;
1289 struct ib_qp_init_attr attr = {};
1290 struct ib_uverbs_ex_create_qp_resp resp = {};
1291 int ret;
1292 struct ib_rwq_ind_table *ind_tbl = NULL;
1293 bool has_sq = true;
1294 struct ib_device *ib_dev;
1295
1296 switch (cmd->qp_type) {
1297 case IB_QPT_RAW_PACKET:
1298 if (!capable(CAP_NET_RAW))
1299 return -EPERM;
1300 break;
1301 case IB_QPT_RC:
1302 case IB_QPT_UC:
1303 case IB_QPT_UD:
1304 case IB_QPT_XRC_INI:
1305 case IB_QPT_XRC_TGT:
1306 case IB_QPT_DRIVER:
1307 break;
1308 default:
1309 return -EINVAL;
1310 }
1311
1312 obj = (struct ib_uqp_object *)uobj_alloc(UVERBS_OBJECT_QP, attrs,
1313 &ib_dev);
1314 if (IS_ERR(obj))
1315 return PTR_ERR(obj);
1316 obj->uxrcd = NULL;
1317 obj->uevent.uobject.user_handle = cmd->user_handle;
1318 mutex_init(&obj->mcast_lock);
1319
1320 if (cmd->comp_mask & IB_UVERBS_CREATE_QP_MASK_IND_TABLE) {
1321 ind_tbl = uobj_get_obj_read(rwq_ind_table,
1322 UVERBS_OBJECT_RWQ_IND_TBL,
1323 cmd->rwq_ind_tbl_handle, attrs);
1324 if (!ind_tbl) {
1325 ret = -EINVAL;
1326 goto err_put;
1327 }
1328
1329 attr.rwq_ind_tbl = ind_tbl;
1330 }
1331
1332 if (ind_tbl && (cmd->max_recv_wr || cmd->max_recv_sge || cmd->is_srq)) {
1333 ret = -EINVAL;
1334 goto err_put;
1335 }
1336
1337 if (ind_tbl && !cmd->max_send_wr)
1338 has_sq = false;
1339
1340 if (cmd->qp_type == IB_QPT_XRC_TGT) {
1341 xrcd_uobj = uobj_get_read(UVERBS_OBJECT_XRCD, cmd->pd_handle,
1342 attrs);
1343
1344 if (IS_ERR(xrcd_uobj)) {
1345 ret = -EINVAL;
1346 goto err_put;
1347 }
1348
1349 xrcd = (struct ib_xrcd *)xrcd_uobj->object;
1350 if (!xrcd) {
1351 ret = -EINVAL;
1352 goto err_put;
1353 }
1354 device = xrcd->device;
1355 } else {
1356 if (cmd->qp_type == IB_QPT_XRC_INI) {
1357 cmd->max_recv_wr = 0;
1358 cmd->max_recv_sge = 0;
1359 } else {
1360 if (cmd->is_srq) {
1361 srq = uobj_get_obj_read(srq, UVERBS_OBJECT_SRQ,
1362 cmd->srq_handle, attrs);
1363 if (!srq || srq->srq_type == IB_SRQT_XRC) {
1364 ret = -EINVAL;
1365 goto err_put;
1366 }
1367 }
1368
1369 if (!ind_tbl) {
1370 if (cmd->recv_cq_handle != cmd->send_cq_handle) {
1371 rcq = uobj_get_obj_read(
1372 cq, UVERBS_OBJECT_CQ,
1373 cmd->recv_cq_handle, attrs);
1374 if (!rcq) {
1375 ret = -EINVAL;
1376 goto err_put;
1377 }
1378 }
1379 }
1380 }
1381
1382 if (has_sq)
1383 scq = uobj_get_obj_read(cq, UVERBS_OBJECT_CQ,
1384 cmd->send_cq_handle, attrs);
1385 if (!ind_tbl)
1386 rcq = rcq ?: scq;
1387 pd = uobj_get_obj_read(pd, UVERBS_OBJECT_PD, cmd->pd_handle,
1388 attrs);
1389 if (!pd || (!scq && has_sq)) {
1390 ret = -EINVAL;
1391 goto err_put;
1392 }
1393
1394 device = pd->device;
1395 }
1396
1397 attr.event_handler = ib_uverbs_qp_event_handler;
1398 attr.send_cq = scq;
1399 attr.recv_cq = rcq;
1400 attr.srq = srq;
1401 attr.xrcd = xrcd;
1402 attr.sq_sig_type = cmd->sq_sig_all ? IB_SIGNAL_ALL_WR :
1403 IB_SIGNAL_REQ_WR;
1404 attr.qp_type = cmd->qp_type;
1405 attr.create_flags = 0;
1406
1407 attr.cap.max_send_wr = cmd->max_send_wr;
1408 attr.cap.max_recv_wr = cmd->max_recv_wr;
1409 attr.cap.max_send_sge = cmd->max_send_sge;
1410 attr.cap.max_recv_sge = cmd->max_recv_sge;
1411 attr.cap.max_inline_data = cmd->max_inline_data;
1412
1413 INIT_LIST_HEAD(&obj->uevent.event_list);
1414 INIT_LIST_HEAD(&obj->mcast_list);
1415
1416 attr.create_flags = cmd->create_flags;
1417 if (attr.create_flags & ~(IB_QP_CREATE_BLOCK_MULTICAST_LOOPBACK |
1418 IB_QP_CREATE_CROSS_CHANNEL |
1419 IB_QP_CREATE_MANAGED_SEND |
1420 IB_QP_CREATE_MANAGED_RECV |
1421 IB_QP_CREATE_SCATTER_FCS |
1422 IB_QP_CREATE_CVLAN_STRIPPING |
1423 IB_QP_CREATE_SOURCE_QPN |
1424 IB_QP_CREATE_PCI_WRITE_END_PADDING)) {
1425 ret = -EINVAL;
1426 goto err_put;
1427 }
1428
1429 if (attr.create_flags & IB_QP_CREATE_SOURCE_QPN) {
1430 if (!capable(CAP_NET_RAW)) {
1431 ret = -EPERM;
1432 goto err_put;
1433 }
1434
1435 attr.source_qpn = cmd->source_qpn;
1436 }
1437
1438 if (cmd->qp_type == IB_QPT_XRC_TGT)
1439 qp = ib_create_qp(pd, &attr);
1440 else
1441 qp = _ib_create_qp(device, pd, &attr, &attrs->driver_udata, obj,
1442 NULL);
1443
1444 if (IS_ERR(qp)) {
1445 ret = PTR_ERR(qp);
1446 goto err_put;
1447 }
1448
1449 if (cmd->qp_type != IB_QPT_XRC_TGT) {
1450 ret = ib_create_qp_security(qp, device);
1451 if (ret)
1452 goto err_cb;
1453
1454 atomic_inc(&pd->usecnt);
1455 if (attr.send_cq)
1456 atomic_inc(&attr.send_cq->usecnt);
1457 if (attr.recv_cq)
1458 atomic_inc(&attr.recv_cq->usecnt);
1459 if (attr.srq)
1460 atomic_inc(&attr.srq->usecnt);
1461 if (ind_tbl)
1462 atomic_inc(&ind_tbl->usecnt);
1463 } else {
1464 /* It is done in _ib_create_qp for other QP types */
1465 qp->uobject = obj;
1466 }
1467
1468 obj->uevent.uobject.object = qp;
1469 obj->uevent.event_file = READ_ONCE(attrs->ufile->default_async_file);
1470 if (obj->uevent.event_file)
1471 uverbs_uobject_get(&obj->uevent.event_file->uobj);
1472
1473 if (xrcd) {
1474 obj->uxrcd = container_of(xrcd_uobj, struct ib_uxrcd_object,
1475 uobject);
1476 atomic_inc(&obj->uxrcd->refcnt);
1477 uobj_put_read(xrcd_uobj);
1478 }
1479
1480 if (pd)
1481 uobj_put_obj_read(pd);
1482 if (scq)
1483 rdma_lookup_put_uobject(&scq->uobject->uevent.uobject,
1484 UVERBS_LOOKUP_READ);
1485 if (rcq && rcq != scq)
1486 rdma_lookup_put_uobject(&rcq->uobject->uevent.uobject,
1487 UVERBS_LOOKUP_READ);
1488 if (srq)
1489 rdma_lookup_put_uobject(&srq->uobject->uevent.uobject,
1490 UVERBS_LOOKUP_READ);
1491 if (ind_tbl)
1492 uobj_put_obj_read(ind_tbl);
1493 uobj_finalize_uobj_create(&obj->uevent.uobject, attrs);
1494
1495 resp.base.qpn = qp->qp_num;
1496 resp.base.qp_handle = obj->uevent.uobject.id;
1497 resp.base.max_recv_sge = attr.cap.max_recv_sge;
1498 resp.base.max_send_sge = attr.cap.max_send_sge;
1499 resp.base.max_recv_wr = attr.cap.max_recv_wr;
1500 resp.base.max_send_wr = attr.cap.max_send_wr;
1501 resp.base.max_inline_data = attr.cap.max_inline_data;
1502 resp.response_length = uverbs_response_length(attrs, sizeof(resp));
1503 return uverbs_response(attrs, &resp, sizeof(resp));
1504
1505 err_cb:
1506 ib_destroy_qp_user(qp, uverbs_get_cleared_udata(attrs));
1507
1508 err_put:
1509 if (!IS_ERR(xrcd_uobj))
1510 uobj_put_read(xrcd_uobj);
1511 if (pd)
1512 uobj_put_obj_read(pd);
1513 if (scq)
1514 rdma_lookup_put_uobject(&scq->uobject->uevent.uobject,
1515 UVERBS_LOOKUP_READ);
1516 if (rcq && rcq != scq)
1517 rdma_lookup_put_uobject(&rcq->uobject->uevent.uobject,
1518 UVERBS_LOOKUP_READ);
1519 if (srq)
1520 rdma_lookup_put_uobject(&srq->uobject->uevent.uobject,
1521 UVERBS_LOOKUP_READ);
1522 if (ind_tbl)
1523 uobj_put_obj_read(ind_tbl);
1524
1525 uobj_alloc_abort(&obj->uevent.uobject, attrs);
1526 return ret;
1527 }
1528
1529 static int ib_uverbs_create_qp(struct uverbs_attr_bundle *attrs)
1530 {
1531 struct ib_uverbs_create_qp cmd;
1532 struct ib_uverbs_ex_create_qp cmd_ex;
1533 int ret;
1534
1535 ret = uverbs_request(attrs, &cmd, sizeof(cmd));
1536 if (ret)
1537 return ret;
1538
1539 memset(&cmd_ex, 0, sizeof(cmd_ex));
1540 cmd_ex.user_handle = cmd.user_handle;
1541 cmd_ex.pd_handle = cmd.pd_handle;
1542 cmd_ex.send_cq_handle = cmd.send_cq_handle;
1543 cmd_ex.recv_cq_handle = cmd.recv_cq_handle;
1544 cmd_ex.srq_handle = cmd.srq_handle;
1545 cmd_ex.max_send_wr = cmd.max_send_wr;
1546 cmd_ex.max_recv_wr = cmd.max_recv_wr;
1547 cmd_ex.max_send_sge = cmd.max_send_sge;
1548 cmd_ex.max_recv_sge = cmd.max_recv_sge;
1549 cmd_ex.max_inline_data = cmd.max_inline_data;
1550 cmd_ex.sq_sig_all = cmd.sq_sig_all;
1551 cmd_ex.qp_type = cmd.qp_type;
1552 cmd_ex.is_srq = cmd.is_srq;
1553
1554 return create_qp(attrs, &cmd_ex);
1555 }
1556
1557 static int ib_uverbs_ex_create_qp(struct uverbs_attr_bundle *attrs)
1558 {
1559 struct ib_uverbs_ex_create_qp cmd;
1560 int ret;
1561
1562 ret = uverbs_request(attrs, &cmd, sizeof(cmd));
1563 if (ret)
1564 return ret;
1565
1566 if (cmd.comp_mask & ~IB_UVERBS_CREATE_QP_SUP_COMP_MASK)
1567 return -EINVAL;
1568
1569 if (cmd.reserved)
1570 return -EINVAL;
1571
1572 return create_qp(attrs, &cmd);
1573 }
1574
1575 static int ib_uverbs_open_qp(struct uverbs_attr_bundle *attrs)
1576 {
1577 struct ib_uverbs_create_qp_resp resp = {};
1578 struct ib_uverbs_open_qp cmd;
1579 struct ib_uqp_object *obj;
1580 struct ib_xrcd *xrcd;
1581 struct ib_qp *qp;
1582 struct ib_qp_open_attr attr = {};
1583 int ret;
1584 struct ib_uobject *xrcd_uobj;
1585 struct ib_device *ib_dev;
1586
1587 ret = uverbs_request(attrs, &cmd, sizeof(cmd));
1588 if (ret)
1589 return ret;
1590
1591 obj = (struct ib_uqp_object *)uobj_alloc(UVERBS_OBJECT_QP, attrs,
1592 &ib_dev);
1593 if (IS_ERR(obj))
1594 return PTR_ERR(obj);
1595
1596 xrcd_uobj = uobj_get_read(UVERBS_OBJECT_XRCD, cmd.pd_handle, attrs);
1597 if (IS_ERR(xrcd_uobj)) {
1598 ret = -EINVAL;
1599 goto err_put;
1600 }
1601
1602 xrcd = (struct ib_xrcd *)xrcd_uobj->object;
1603 if (!xrcd) {
1604 ret = -EINVAL;
1605 goto err_xrcd;
1606 }
1607
1608 attr.event_handler = ib_uverbs_qp_event_handler;
1609 attr.qp_num = cmd.qpn;
1610 attr.qp_type = cmd.qp_type;
1611
1612 INIT_LIST_HEAD(&obj->uevent.event_list);
1613 INIT_LIST_HEAD(&obj->mcast_list);
1614
1615 qp = ib_open_qp(xrcd, &attr);
1616 if (IS_ERR(qp)) {
1617 ret = PTR_ERR(qp);
1618 goto err_xrcd;
1619 }
1620
1621 obj->uevent.uobject.object = qp;
1622 obj->uevent.uobject.user_handle = cmd.user_handle;
1623
1624 obj->uxrcd = container_of(xrcd_uobj, struct ib_uxrcd_object, uobject);
1625 atomic_inc(&obj->uxrcd->refcnt);
1626 qp->uobject = obj;
1627 uobj_put_read(xrcd_uobj);
1628 uobj_finalize_uobj_create(&obj->uevent.uobject, attrs);
1629
1630 resp.qpn = qp->qp_num;
1631 resp.qp_handle = obj->uevent.uobject.id;
1632 return uverbs_response(attrs, &resp, sizeof(resp));
1633
1634 err_xrcd:
1635 uobj_put_read(xrcd_uobj);
1636 err_put:
1637 uobj_alloc_abort(&obj->uevent.uobject, attrs);
1638 return ret;
1639 }
1640
1641 static void copy_ah_attr_to_uverbs(struct ib_uverbs_qp_dest *uverb_attr,
1642 struct rdma_ah_attr *rdma_attr)
1643 {
1644 const struct ib_global_route *grh;
1645
1646 uverb_attr->dlid = rdma_ah_get_dlid(rdma_attr);
1647 uverb_attr->sl = rdma_ah_get_sl(rdma_attr);
1648 uverb_attr->src_path_bits = rdma_ah_get_path_bits(rdma_attr);
1649 uverb_attr->static_rate = rdma_ah_get_static_rate(rdma_attr);
1650 uverb_attr->is_global = !!(rdma_ah_get_ah_flags(rdma_attr) &
1651 IB_AH_GRH);
1652 if (uverb_attr->is_global) {
1653 grh = rdma_ah_read_grh(rdma_attr);
1654 memcpy(uverb_attr->dgid, grh->dgid.raw, 16);
1655 uverb_attr->flow_label = grh->flow_label;
1656 uverb_attr->sgid_index = grh->sgid_index;
1657 uverb_attr->hop_limit = grh->hop_limit;
1658 uverb_attr->traffic_class = grh->traffic_class;
1659 }
1660 uverb_attr->port_num = rdma_ah_get_port_num(rdma_attr);
1661 }
1662
1663 static int ib_uverbs_query_qp(struct uverbs_attr_bundle *attrs)
1664 {
1665 struct ib_uverbs_query_qp cmd;
1666 struct ib_uverbs_query_qp_resp resp;
1667 struct ib_qp *qp;
1668 struct ib_qp_attr *attr;
1669 struct ib_qp_init_attr *init_attr;
1670 int ret;
1671
1672 ret = uverbs_request(attrs, &cmd, sizeof(cmd));
1673 if (ret)
1674 return ret;
1675
1676 attr = kmalloc(sizeof *attr, GFP_KERNEL);
1677 init_attr = kmalloc(sizeof *init_attr, GFP_KERNEL);
1678 if (!attr || !init_attr) {
1679 ret = -ENOMEM;
1680 goto out;
1681 }
1682
1683 qp = uobj_get_obj_read(qp, UVERBS_OBJECT_QP, cmd.qp_handle, attrs);
1684 if (!qp) {
1685 ret = -EINVAL;
1686 goto out;
1687 }
1688
1689 ret = ib_query_qp(qp, attr, cmd.attr_mask, init_attr);
1690
1691 rdma_lookup_put_uobject(&qp->uobject->uevent.uobject,
1692 UVERBS_LOOKUP_READ);
1693
1694 if (ret)
1695 goto out;
1696
1697 memset(&resp, 0, sizeof resp);
1698
1699 resp.qp_state = attr->qp_state;
1700 resp.cur_qp_state = attr->cur_qp_state;
1701 resp.path_mtu = attr->path_mtu;
1702 resp.path_mig_state = attr->path_mig_state;
1703 resp.qkey = attr->qkey;
1704 resp.rq_psn = attr->rq_psn;
1705 resp.sq_psn = attr->sq_psn;
1706 resp.dest_qp_num = attr->dest_qp_num;
1707 resp.qp_access_flags = attr->qp_access_flags;
1708 resp.pkey_index = attr->pkey_index;
1709 resp.alt_pkey_index = attr->alt_pkey_index;
1710 resp.sq_draining = attr->sq_draining;
1711 resp.max_rd_atomic = attr->max_rd_atomic;
1712 resp.max_dest_rd_atomic = attr->max_dest_rd_atomic;
1713 resp.min_rnr_timer = attr->min_rnr_timer;
1714 resp.port_num = attr->port_num;
1715 resp.timeout = attr->timeout;
1716 resp.retry_cnt = attr->retry_cnt;
1717 resp.rnr_retry = attr->rnr_retry;
1718 resp.alt_port_num = attr->alt_port_num;
1719 resp.alt_timeout = attr->alt_timeout;
1720
1721 copy_ah_attr_to_uverbs(&resp.dest, &attr->ah_attr);
1722 copy_ah_attr_to_uverbs(&resp.alt_dest, &attr->alt_ah_attr);
1723
1724 resp.max_send_wr = init_attr->cap.max_send_wr;
1725 resp.max_recv_wr = init_attr->cap.max_recv_wr;
1726 resp.max_send_sge = init_attr->cap.max_send_sge;
1727 resp.max_recv_sge = init_attr->cap.max_recv_sge;
1728 resp.max_inline_data = init_attr->cap.max_inline_data;
1729 resp.sq_sig_all = init_attr->sq_sig_type == IB_SIGNAL_ALL_WR;
1730
1731 ret = uverbs_response(attrs, &resp, sizeof(resp));
1732
1733 out:
1734 kfree(attr);
1735 kfree(init_attr);
1736
1737 return ret;
1738 }
1739
1740 /* Remove ignored fields set in the attribute mask */
1741 static int modify_qp_mask(enum ib_qp_type qp_type, int mask)
1742 {
1743 switch (qp_type) {
1744 case IB_QPT_XRC_INI:
1745 return mask & ~(IB_QP_MAX_DEST_RD_ATOMIC | IB_QP_MIN_RNR_TIMER);
1746 case IB_QPT_XRC_TGT:
1747 return mask & ~(IB_QP_MAX_QP_RD_ATOMIC | IB_QP_RETRY_CNT |
1748 IB_QP_RNR_RETRY);
1749 default:
1750 return mask;
1751 }
1752 }
1753
1754 static void copy_ah_attr_from_uverbs(struct ib_device *dev,
1755 struct rdma_ah_attr *rdma_attr,
1756 struct ib_uverbs_qp_dest *uverb_attr)
1757 {
1758 rdma_attr->type = rdma_ah_find_type(dev, uverb_attr->port_num);
1759 if (uverb_attr->is_global) {
1760 rdma_ah_set_grh(rdma_attr, NULL,
1761 uverb_attr->flow_label,
1762 uverb_attr->sgid_index,
1763 uverb_attr->hop_limit,
1764 uverb_attr->traffic_class);
1765 rdma_ah_set_dgid_raw(rdma_attr, uverb_attr->dgid);
1766 } else {
1767 rdma_ah_set_ah_flags(rdma_attr, 0);
1768 }
1769 rdma_ah_set_dlid(rdma_attr, uverb_attr->dlid);
1770 rdma_ah_set_sl(rdma_attr, uverb_attr->sl);
1771 rdma_ah_set_path_bits(rdma_attr, uverb_attr->src_path_bits);
1772 rdma_ah_set_static_rate(rdma_attr, uverb_attr->static_rate);
1773 rdma_ah_set_port_num(rdma_attr, uverb_attr->port_num);
1774 rdma_ah_set_make_grd(rdma_attr, false);
1775 }
1776
1777 static int modify_qp(struct uverbs_attr_bundle *attrs,
1778 struct ib_uverbs_ex_modify_qp *cmd)
1779 {
1780 struct ib_qp_attr *attr;
1781 struct ib_qp *qp;
1782 int ret;
1783
1784 attr = kzalloc(sizeof(*attr), GFP_KERNEL);
1785 if (!attr)
1786 return -ENOMEM;
1787
1788 qp = uobj_get_obj_read(qp, UVERBS_OBJECT_QP, cmd->base.qp_handle,
1789 attrs);
1790 if (!qp) {
1791 ret = -EINVAL;
1792 goto out;
1793 }
1794
1795 if ((cmd->base.attr_mask & IB_QP_PORT) &&
1796 !rdma_is_port_valid(qp->device, cmd->base.port_num)) {
1797 ret = -EINVAL;
1798 goto release_qp;
1799 }
1800
1801 if ((cmd->base.attr_mask & IB_QP_AV)) {
1802 if (!rdma_is_port_valid(qp->device, cmd->base.dest.port_num)) {
1803 ret = -EINVAL;
1804 goto release_qp;
1805 }
1806
1807 if (cmd->base.attr_mask & IB_QP_STATE &&
1808 cmd->base.qp_state == IB_QPS_RTR) {
1809 /* We are in INIT->RTR TRANSITION (if we are not,
1810 * this transition will be rejected in subsequent checks).
1811 * In the INIT->RTR transition, we cannot have IB_QP_PORT set,
1812 * but the IB_QP_STATE flag is required.
1813 *
1814 * Since kernel 3.14 (commit dbf727de7440), the uverbs driver,
1815 * when IB_QP_AV is set, has required inclusion of a valid
1816 * port number in the primary AV. (AVs are created and handled
1817 * differently for infiniband and ethernet (RoCE) ports).
1818 *
1819 * Check the port number included in the primary AV against
1820 * the port number in the qp struct, which was set (and saved)
1821 * in the RST->INIT transition.
1822 */
1823 if (cmd->base.dest.port_num != qp->real_qp->port) {
1824 ret = -EINVAL;
1825 goto release_qp;
1826 }
1827 } else {
1828 /* We are in SQD->SQD. (If we are not, this transition will
1829 * be rejected later in the verbs layer checks).
1830 * Check for both IB_QP_PORT and IB_QP_AV, these can be set
1831 * together in the SQD->SQD transition.
1832 *
1833 * If only IP_QP_AV was set, add in IB_QP_PORT as well (the
1834 * verbs layer driver does not track primary port changes
1835 * resulting from path migration. Thus, in SQD, if the primary
1836 * AV is modified, the primary port should also be modified).
1837 *
1838 * Note that in this transition, the IB_QP_STATE flag
1839 * is not allowed.
1840 */
1841 if (((cmd->base.attr_mask & (IB_QP_AV | IB_QP_PORT))
1842 == (IB_QP_AV | IB_QP_PORT)) &&
1843 cmd->base.port_num != cmd->base.dest.port_num) {
1844 ret = -EINVAL;
1845 goto release_qp;
1846 }
1847 if ((cmd->base.attr_mask & (IB_QP_AV | IB_QP_PORT))
1848 == IB_QP_AV) {
1849 cmd->base.attr_mask |= IB_QP_PORT;
1850 cmd->base.port_num = cmd->base.dest.port_num;
1851 }
1852 }
1853 }
1854
1855 if ((cmd->base.attr_mask & IB_QP_ALT_PATH) &&
1856 (!rdma_is_port_valid(qp->device, cmd->base.alt_port_num) ||
1857 !rdma_is_port_valid(qp->device, cmd->base.alt_dest.port_num) ||
1858 cmd->base.alt_port_num != cmd->base.alt_dest.port_num)) {
1859 ret = -EINVAL;
1860 goto release_qp;
1861 }
1862
1863 if ((cmd->base.attr_mask & IB_QP_CUR_STATE &&
1864 cmd->base.cur_qp_state > IB_QPS_ERR) ||
1865 (cmd->base.attr_mask & IB_QP_STATE &&
1866 cmd->base.qp_state > IB_QPS_ERR)) {
1867 ret = -EINVAL;
1868 goto release_qp;
1869 }
1870
1871 if (cmd->base.attr_mask & IB_QP_STATE)
1872 attr->qp_state = cmd->base.qp_state;
1873 if (cmd->base.attr_mask & IB_QP_CUR_STATE)
1874 attr->cur_qp_state = cmd->base.cur_qp_state;
1875 if (cmd->base.attr_mask & IB_QP_PATH_MTU)
1876 attr->path_mtu = cmd->base.path_mtu;
1877 if (cmd->base.attr_mask & IB_QP_PATH_MIG_STATE)
1878 attr->path_mig_state = cmd->base.path_mig_state;
1879 if (cmd->base.attr_mask & IB_QP_QKEY)
1880 attr->qkey = cmd->base.qkey;
1881 if (cmd->base.attr_mask & IB_QP_RQ_PSN)
1882 attr->rq_psn = cmd->base.rq_psn;
1883 if (cmd->base.attr_mask & IB_QP_SQ_PSN)
1884 attr->sq_psn = cmd->base.sq_psn;
1885 if (cmd->base.attr_mask & IB_QP_DEST_QPN)
1886 attr->dest_qp_num = cmd->base.dest_qp_num;
1887 if (cmd->base.attr_mask & IB_QP_ACCESS_FLAGS)
1888 attr->qp_access_flags = cmd->base.qp_access_flags;
1889 if (cmd->base.attr_mask & IB_QP_PKEY_INDEX)
1890 attr->pkey_index = cmd->base.pkey_index;
1891 if (cmd->base.attr_mask & IB_QP_EN_SQD_ASYNC_NOTIFY)
1892 attr->en_sqd_async_notify = cmd->base.en_sqd_async_notify;
1893 if (cmd->base.attr_mask & IB_QP_MAX_QP_RD_ATOMIC)
1894 attr->max_rd_atomic = cmd->base.max_rd_atomic;
1895 if (cmd->base.attr_mask & IB_QP_MAX_DEST_RD_ATOMIC)
1896 attr->max_dest_rd_atomic = cmd->base.max_dest_rd_atomic;
1897 if (cmd->base.attr_mask & IB_QP_MIN_RNR_TIMER)
1898 attr->min_rnr_timer = cmd->base.min_rnr_timer;
1899 if (cmd->base.attr_mask & IB_QP_PORT)
1900 attr->port_num = cmd->base.port_num;
1901 if (cmd->base.attr_mask & IB_QP_TIMEOUT)
1902 attr->timeout = cmd->base.timeout;
1903 if (cmd->base.attr_mask & IB_QP_RETRY_CNT)
1904 attr->retry_cnt = cmd->base.retry_cnt;
1905 if (cmd->base.attr_mask & IB_QP_RNR_RETRY)
1906 attr->rnr_retry = cmd->base.rnr_retry;
1907 if (cmd->base.attr_mask & IB_QP_ALT_PATH) {
1908 attr->alt_port_num = cmd->base.alt_port_num;
1909 attr->alt_timeout = cmd->base.alt_timeout;
1910 attr->alt_pkey_index = cmd->base.alt_pkey_index;
1911 }
1912 if (cmd->base.attr_mask & IB_QP_RATE_LIMIT)
1913 attr->rate_limit = cmd->rate_limit;
1914
1915 if (cmd->base.attr_mask & IB_QP_AV)
1916 copy_ah_attr_from_uverbs(qp->device, &attr->ah_attr,
1917 &cmd->base.dest);
1918
1919 if (cmd->base.attr_mask & IB_QP_ALT_PATH)
1920 copy_ah_attr_from_uverbs(qp->device, &attr->alt_ah_attr,
1921 &cmd->base.alt_dest);
1922
1923 ret = ib_modify_qp_with_udata(qp, attr,
1924 modify_qp_mask(qp->qp_type,
1925 cmd->base.attr_mask),
1926 &attrs->driver_udata);
1927
1928 release_qp:
1929 rdma_lookup_put_uobject(&qp->uobject->uevent.uobject,
1930 UVERBS_LOOKUP_READ);
1931 out:
1932 kfree(attr);
1933
1934 return ret;
1935 }
1936
1937 static int ib_uverbs_modify_qp(struct uverbs_attr_bundle *attrs)
1938 {
1939 struct ib_uverbs_ex_modify_qp cmd;
1940 int ret;
1941
1942 ret = uverbs_request(attrs, &cmd.base, sizeof(cmd.base));
1943 if (ret)
1944 return ret;
1945
1946 if (cmd.base.attr_mask & ~IB_QP_ATTR_STANDARD_BITS)
1947 return -EOPNOTSUPP;
1948
1949 return modify_qp(attrs, &cmd);
1950 }
1951
1952 static int ib_uverbs_ex_modify_qp(struct uverbs_attr_bundle *attrs)
1953 {
1954 struct ib_uverbs_ex_modify_qp cmd;
1955 struct ib_uverbs_ex_modify_qp_resp resp = {
1956 .response_length = uverbs_response_length(attrs, sizeof(resp))
1957 };
1958 int ret;
1959
1960 ret = uverbs_request(attrs, &cmd, sizeof(cmd));
1961 if (ret)
1962 return ret;
1963
1964 /*
1965 * Last bit is reserved for extending the attr_mask by
1966 * using another field.
1967 */
1968 if (cmd.base.attr_mask & ~(IB_QP_ATTR_STANDARD_BITS | IB_QP_RATE_LIMIT))
1969 return -EOPNOTSUPP;
1970
1971 ret = modify_qp(attrs, &cmd);
1972 if (ret)
1973 return ret;
1974
1975 return uverbs_response(attrs, &resp, sizeof(resp));
1976 }
1977
1978 static int ib_uverbs_destroy_qp(struct uverbs_attr_bundle *attrs)
1979 {
1980 struct ib_uverbs_destroy_qp cmd;
1981 struct ib_uverbs_destroy_qp_resp resp;
1982 struct ib_uobject *uobj;
1983 struct ib_uqp_object *obj;
1984 int ret;
1985
1986 ret = uverbs_request(attrs, &cmd, sizeof(cmd));
1987 if (ret)
1988 return ret;
1989
1990 uobj = uobj_get_destroy(UVERBS_OBJECT_QP, cmd.qp_handle, attrs);
1991 if (IS_ERR(uobj))
1992 return PTR_ERR(uobj);
1993
1994 obj = container_of(uobj, struct ib_uqp_object, uevent.uobject);
1995 memset(&resp, 0, sizeof(resp));
1996 resp.events_reported = obj->uevent.events_reported;
1997
1998 uobj_put_destroy(uobj);
1999
2000 return uverbs_response(attrs, &resp, sizeof(resp));
2001 }
2002
2003 static void *alloc_wr(size_t wr_size, __u32 num_sge)
2004 {
2005 if (num_sge >= (U32_MAX - ALIGN(wr_size, sizeof (struct ib_sge))) /
2006 sizeof (struct ib_sge))
2007 return NULL;
2008
2009 return kmalloc(ALIGN(wr_size, sizeof (struct ib_sge)) +
2010 num_sge * sizeof (struct ib_sge), GFP_KERNEL);
2011 }
2012
2013 static int ib_uverbs_post_send(struct uverbs_attr_bundle *attrs)
2014 {
2015 struct ib_uverbs_post_send cmd;
2016 struct ib_uverbs_post_send_resp resp;
2017 struct ib_uverbs_send_wr *user_wr;
2018 struct ib_send_wr *wr = NULL, *last, *next;
2019 const struct ib_send_wr *bad_wr;
2020 struct ib_qp *qp;
2021 int i, sg_ind;
2022 int is_ud;
2023 int ret, ret2;
2024 size_t next_size;
2025 const struct ib_sge __user *sgls;
2026 const void __user *wqes;
2027 struct uverbs_req_iter iter;
2028
2029 ret = uverbs_request_start(attrs, &iter, &cmd, sizeof(cmd));
2030 if (ret)
2031 return ret;
2032 wqes = uverbs_request_next_ptr(&iter, cmd.wqe_size * cmd.wr_count);
2033 if (IS_ERR(wqes))
2034 return PTR_ERR(wqes);
2035 sgls = uverbs_request_next_ptr(
2036 &iter, cmd.sge_count * sizeof(struct ib_uverbs_sge));
2037 if (IS_ERR(sgls))
2038 return PTR_ERR(sgls);
2039 ret = uverbs_request_finish(&iter);
2040 if (ret)
2041 return ret;
2042
2043 user_wr = kmalloc(cmd.wqe_size, GFP_KERNEL);
2044 if (!user_wr)
2045 return -ENOMEM;
2046
2047 qp = uobj_get_obj_read(qp, UVERBS_OBJECT_QP, cmd.qp_handle, attrs);
2048 if (!qp) {
2049 ret = -EINVAL;
2050 goto out;
2051 }
2052
2053 is_ud = qp->qp_type == IB_QPT_UD;
2054 sg_ind = 0;
2055 last = NULL;
2056 for (i = 0; i < cmd.wr_count; ++i) {
2057 if (copy_from_user(user_wr, wqes + i * cmd.wqe_size,
2058 cmd.wqe_size)) {
2059 ret = -EFAULT;
2060 goto out_put;
2061 }
2062
2063 if (user_wr->num_sge + sg_ind > cmd.sge_count) {
2064 ret = -EINVAL;
2065 goto out_put;
2066 }
2067
2068 if (is_ud) {
2069 struct ib_ud_wr *ud;
2070
2071 if (user_wr->opcode != IB_WR_SEND &&
2072 user_wr->opcode != IB_WR_SEND_WITH_IMM) {
2073 ret = -EINVAL;
2074 goto out_put;
2075 }
2076
2077 next_size = sizeof(*ud);
2078 ud = alloc_wr(next_size, user_wr->num_sge);
2079 if (!ud) {
2080 ret = -ENOMEM;
2081 goto out_put;
2082 }
2083
2084 ud->ah = uobj_get_obj_read(ah, UVERBS_OBJECT_AH,
2085 user_wr->wr.ud.ah, attrs);
2086 if (!ud->ah) {
2087 kfree(ud);
2088 ret = -EINVAL;
2089 goto out_put;
2090 }
2091 ud->remote_qpn = user_wr->wr.ud.remote_qpn;
2092 ud->remote_qkey = user_wr->wr.ud.remote_qkey;
2093
2094 next = &ud->wr;
2095 } else if (user_wr->opcode == IB_WR_RDMA_WRITE_WITH_IMM ||
2096 user_wr->opcode == IB_WR_RDMA_WRITE ||
2097 user_wr->opcode == IB_WR_RDMA_READ) {
2098 struct ib_rdma_wr *rdma;
2099
2100 next_size = sizeof(*rdma);
2101 rdma = alloc_wr(next_size, user_wr->num_sge);
2102 if (!rdma) {
2103 ret = -ENOMEM;
2104 goto out_put;
2105 }
2106
2107 rdma->remote_addr = user_wr->wr.rdma.remote_addr;
2108 rdma->rkey = user_wr->wr.rdma.rkey;
2109
2110 next = &rdma->wr;
2111 } else if (user_wr->opcode == IB_WR_ATOMIC_CMP_AND_SWP ||
2112 user_wr->opcode == IB_WR_ATOMIC_FETCH_AND_ADD) {
2113 struct ib_atomic_wr *atomic;
2114
2115 next_size = sizeof(*atomic);
2116 atomic = alloc_wr(next_size, user_wr->num_sge);
2117 if (!atomic) {
2118 ret = -ENOMEM;
2119 goto out_put;
2120 }
2121
2122 atomic->remote_addr = user_wr->wr.atomic.remote_addr;
2123 atomic->compare_add = user_wr->wr.atomic.compare_add;
2124 atomic->swap = user_wr->wr.atomic.swap;
2125 atomic->rkey = user_wr->wr.atomic.rkey;
2126
2127 next = &atomic->wr;
2128 } else if (user_wr->opcode == IB_WR_SEND ||
2129 user_wr->opcode == IB_WR_SEND_WITH_IMM ||
2130 user_wr->opcode == IB_WR_SEND_WITH_INV) {
2131 next_size = sizeof(*next);
2132 next = alloc_wr(next_size, user_wr->num_sge);
2133 if (!next) {
2134 ret = -ENOMEM;
2135 goto out_put;
2136 }
2137 } else {
2138 ret = -EINVAL;
2139 goto out_put;
2140 }
2141
2142 if (user_wr->opcode == IB_WR_SEND_WITH_IMM ||
2143 user_wr->opcode == IB_WR_RDMA_WRITE_WITH_IMM) {
2144 next->ex.imm_data =
2145 (__be32 __force) user_wr->ex.imm_data;
2146 } else if (user_wr->opcode == IB_WR_SEND_WITH_INV) {
2147 next->ex.invalidate_rkey = user_wr->ex.invalidate_rkey;
2148 }
2149
2150 if (!last)
2151 wr = next;
2152 else
2153 last->next = next;
2154 last = next;
2155
2156 next->next = NULL;
2157 next->wr_id = user_wr->wr_id;
2158 next->num_sge = user_wr->num_sge;
2159 next->opcode = user_wr->opcode;
2160 next->send_flags = user_wr->send_flags;
2161
2162 if (next->num_sge) {
2163 next->sg_list = (void *) next +
2164 ALIGN(next_size, sizeof(struct ib_sge));
2165 if (copy_from_user(next->sg_list, sgls + sg_ind,
2166 next->num_sge *
2167 sizeof(struct ib_sge))) {
2168 ret = -EFAULT;
2169 goto out_put;
2170 }
2171 sg_ind += next->num_sge;
2172 } else
2173 next->sg_list = NULL;
2174 }
2175
2176 resp.bad_wr = 0;
2177 ret = qp->device->ops.post_send(qp->real_qp, wr, &bad_wr);
2178 if (ret)
2179 for (next = wr; next; next = next->next) {
2180 ++resp.bad_wr;
2181 if (next == bad_wr)
2182 break;
2183 }
2184
2185 ret2 = uverbs_response(attrs, &resp, sizeof(resp));
2186 if (ret2)
2187 ret = ret2;
2188
2189 out_put:
2190 rdma_lookup_put_uobject(&qp->uobject->uevent.uobject,
2191 UVERBS_LOOKUP_READ);
2192
2193 while (wr) {
2194 if (is_ud && ud_wr(wr)->ah)
2195 uobj_put_obj_read(ud_wr(wr)->ah);
2196 next = wr->next;
2197 kfree(wr);
2198 wr = next;
2199 }
2200
2201 out:
2202 kfree(user_wr);
2203
2204 return ret;
2205 }
2206
2207 static struct ib_recv_wr *
2208 ib_uverbs_unmarshall_recv(struct uverbs_req_iter *iter, u32 wr_count,
2209 u32 wqe_size, u32 sge_count)
2210 {
2211 struct ib_uverbs_recv_wr *user_wr;
2212 struct ib_recv_wr *wr = NULL, *last, *next;
2213 int sg_ind;
2214 int i;
2215 int ret;
2216 const struct ib_sge __user *sgls;
2217 const void __user *wqes;
2218
2219 if (wqe_size < sizeof (struct ib_uverbs_recv_wr))
2220 return ERR_PTR(-EINVAL);
2221
2222 wqes = uverbs_request_next_ptr(iter, wqe_size * wr_count);
2223 if (IS_ERR(wqes))
2224 return ERR_CAST(wqes);
2225 sgls = uverbs_request_next_ptr(
2226 iter, sge_count * sizeof(struct ib_uverbs_sge));
2227 if (IS_ERR(sgls))
2228 return ERR_CAST(sgls);
2229 ret = uverbs_request_finish(iter);
2230 if (ret)
2231 return ERR_PTR(ret);
2232
2233 user_wr = kmalloc(wqe_size, GFP_KERNEL);
2234 if (!user_wr)
2235 return ERR_PTR(-ENOMEM);
2236
2237 sg_ind = 0;
2238 last = NULL;
2239 for (i = 0; i < wr_count; ++i) {
2240 if (copy_from_user(user_wr, wqes + i * wqe_size,
2241 wqe_size)) {
2242 ret = -EFAULT;
2243 goto err;
2244 }
2245
2246 if (user_wr->num_sge + sg_ind > sge_count) {
2247 ret = -EINVAL;
2248 goto err;
2249 }
2250
2251 if (user_wr->num_sge >=
2252 (U32_MAX - ALIGN(sizeof *next, sizeof (struct ib_sge))) /
2253 sizeof (struct ib_sge)) {
2254 ret = -EINVAL;
2255 goto err;
2256 }
2257
2258 next = kmalloc(ALIGN(sizeof *next, sizeof (struct ib_sge)) +
2259 user_wr->num_sge * sizeof (struct ib_sge),
2260 GFP_KERNEL);
2261 if (!next) {
2262 ret = -ENOMEM;
2263 goto err;
2264 }
2265
2266 if (!last)
2267 wr = next;
2268 else
2269 last->next = next;
2270 last = next;
2271
2272 next->next = NULL;
2273 next->wr_id = user_wr->wr_id;
2274 next->num_sge = user_wr->num_sge;
2275
2276 if (next->num_sge) {
2277 next->sg_list = (void *) next +
2278 ALIGN(sizeof *next, sizeof (struct ib_sge));
2279 if (copy_from_user(next->sg_list, sgls + sg_ind,
2280 next->num_sge *
2281 sizeof(struct ib_sge))) {
2282 ret = -EFAULT;
2283 goto err;
2284 }
2285 sg_ind += next->num_sge;
2286 } else
2287 next->sg_list = NULL;
2288 }
2289
2290 kfree(user_wr);
2291 return wr;
2292
2293 err:
2294 kfree(user_wr);
2295
2296 while (wr) {
2297 next = wr->next;
2298 kfree(wr);
2299 wr = next;
2300 }
2301
2302 return ERR_PTR(ret);
2303 }
2304
2305 static int ib_uverbs_post_recv(struct uverbs_attr_bundle *attrs)
2306 {
2307 struct ib_uverbs_post_recv cmd;
2308 struct ib_uverbs_post_recv_resp resp;
2309 struct ib_recv_wr *wr, *next;
2310 const struct ib_recv_wr *bad_wr;
2311 struct ib_qp *qp;
2312 int ret, ret2;
2313 struct uverbs_req_iter iter;
2314
2315 ret = uverbs_request_start(attrs, &iter, &cmd, sizeof(cmd));
2316 if (ret)
2317 return ret;
2318
2319 wr = ib_uverbs_unmarshall_recv(&iter, cmd.wr_count, cmd.wqe_size,
2320 cmd.sge_count);
2321 if (IS_ERR(wr))
2322 return PTR_ERR(wr);
2323
2324 qp = uobj_get_obj_read(qp, UVERBS_OBJECT_QP, cmd.qp_handle, attrs);
2325 if (!qp) {
2326 ret = -EINVAL;
2327 goto out;
2328 }
2329
2330 resp.bad_wr = 0;
2331 ret = qp->device->ops.post_recv(qp->real_qp, wr, &bad_wr);
2332
2333 rdma_lookup_put_uobject(&qp->uobject->uevent.uobject,
2334 UVERBS_LOOKUP_READ);
2335 if (ret) {
2336 for (next = wr; next; next = next->next) {
2337 ++resp.bad_wr;
2338 if (next == bad_wr)
2339 break;
2340 }
2341 }
2342
2343 ret2 = uverbs_response(attrs, &resp, sizeof(resp));
2344 if (ret2)
2345 ret = ret2;
2346 out:
2347 while (wr) {
2348 next = wr->next;
2349 kfree(wr);
2350 wr = next;
2351 }
2352
2353 return ret;
2354 }
2355
2356 static int ib_uverbs_post_srq_recv(struct uverbs_attr_bundle *attrs)
2357 {
2358 struct ib_uverbs_post_srq_recv cmd;
2359 struct ib_uverbs_post_srq_recv_resp resp;
2360 struct ib_recv_wr *wr, *next;
2361 const struct ib_recv_wr *bad_wr;
2362 struct ib_srq *srq;
2363 int ret, ret2;
2364 struct uverbs_req_iter iter;
2365
2366 ret = uverbs_request_start(attrs, &iter, &cmd, sizeof(cmd));
2367 if (ret)
2368 return ret;
2369
2370 wr = ib_uverbs_unmarshall_recv(&iter, cmd.wr_count, cmd.wqe_size,
2371 cmd.sge_count);
2372 if (IS_ERR(wr))
2373 return PTR_ERR(wr);
2374
2375 srq = uobj_get_obj_read(srq, UVERBS_OBJECT_SRQ, cmd.srq_handle, attrs);
2376 if (!srq) {
2377 ret = -EINVAL;
2378 goto out;
2379 }
2380
2381 resp.bad_wr = 0;
2382 ret = srq->device->ops.post_srq_recv(srq, wr, &bad_wr);
2383
2384 rdma_lookup_put_uobject(&srq->uobject->uevent.uobject,
2385 UVERBS_LOOKUP_READ);
2386
2387 if (ret)
2388 for (next = wr; next; next = next->next) {
2389 ++resp.bad_wr;
2390 if (next == bad_wr)
2391 break;
2392 }
2393
2394 ret2 = uverbs_response(attrs, &resp, sizeof(resp));
2395 if (ret2)
2396 ret = ret2;
2397
2398 out:
2399 while (wr) {
2400 next = wr->next;
2401 kfree(wr);
2402 wr = next;
2403 }
2404
2405 return ret;
2406 }
2407
2408 static int ib_uverbs_create_ah(struct uverbs_attr_bundle *attrs)
2409 {
2410 struct ib_uverbs_create_ah cmd;
2411 struct ib_uverbs_create_ah_resp resp;
2412 struct ib_uobject *uobj;
2413 struct ib_pd *pd;
2414 struct ib_ah *ah;
2415 struct rdma_ah_attr attr = {};
2416 int ret;
2417 struct ib_device *ib_dev;
2418
2419 ret = uverbs_request(attrs, &cmd, sizeof(cmd));
2420 if (ret)
2421 return ret;
2422
2423 uobj = uobj_alloc(UVERBS_OBJECT_AH, attrs, &ib_dev);
2424 if (IS_ERR(uobj))
2425 return PTR_ERR(uobj);
2426
2427 if (!rdma_is_port_valid(ib_dev, cmd.attr.port_num)) {
2428 ret = -EINVAL;
2429 goto err;
2430 }
2431
2432 pd = uobj_get_obj_read(pd, UVERBS_OBJECT_PD, cmd.pd_handle, attrs);
2433 if (!pd) {
2434 ret = -EINVAL;
2435 goto err;
2436 }
2437
2438 attr.type = rdma_ah_find_type(ib_dev, cmd.attr.port_num);
2439 rdma_ah_set_make_grd(&attr, false);
2440 rdma_ah_set_dlid(&attr, cmd.attr.dlid);
2441 rdma_ah_set_sl(&attr, cmd.attr.sl);
2442 rdma_ah_set_path_bits(&attr, cmd.attr.src_path_bits);
2443 rdma_ah_set_static_rate(&attr, cmd.attr.static_rate);
2444 rdma_ah_set_port_num(&attr, cmd.attr.port_num);
2445
2446 if (cmd.attr.is_global) {
2447 rdma_ah_set_grh(&attr, NULL, cmd.attr.grh.flow_label,
2448 cmd.attr.grh.sgid_index,
2449 cmd.attr.grh.hop_limit,
2450 cmd.attr.grh.traffic_class);
2451 rdma_ah_set_dgid_raw(&attr, cmd.attr.grh.dgid);
2452 } else {
2453 rdma_ah_set_ah_flags(&attr, 0);
2454 }
2455
2456 ah = rdma_create_user_ah(pd, &attr, &attrs->driver_udata);
2457 if (IS_ERR(ah)) {
2458 ret = PTR_ERR(ah);
2459 goto err_put;
2460 }
2461
2462 ah->uobject = uobj;
2463 uobj->user_handle = cmd.user_handle;
2464 uobj->object = ah;
2465 uobj_put_obj_read(pd);
2466 uobj_finalize_uobj_create(uobj, attrs);
2467
2468 resp.ah_handle = uobj->id;
2469 return uverbs_response(attrs, &resp, sizeof(resp));
2470
2471 err_put:
2472 uobj_put_obj_read(pd);
2473 err:
2474 uobj_alloc_abort(uobj, attrs);
2475 return ret;
2476 }
2477
2478 static int ib_uverbs_destroy_ah(struct uverbs_attr_bundle *attrs)
2479 {
2480 struct ib_uverbs_destroy_ah cmd;
2481 int ret;
2482
2483 ret = uverbs_request(attrs, &cmd, sizeof(cmd));
2484 if (ret)
2485 return ret;
2486
2487 return uobj_perform_destroy(UVERBS_OBJECT_AH, cmd.ah_handle, attrs);
2488 }
2489
2490 static int ib_uverbs_attach_mcast(struct uverbs_attr_bundle *attrs)
2491 {
2492 struct ib_uverbs_attach_mcast cmd;
2493 struct ib_qp *qp;
2494 struct ib_uqp_object *obj;
2495 struct ib_uverbs_mcast_entry *mcast;
2496 int ret;
2497
2498 ret = uverbs_request(attrs, &cmd, sizeof(cmd));
2499 if (ret)
2500 return ret;
2501
2502 qp = uobj_get_obj_read(qp, UVERBS_OBJECT_QP, cmd.qp_handle, attrs);
2503 if (!qp)
2504 return -EINVAL;
2505
2506 obj = qp->uobject;
2507
2508 mutex_lock(&obj->mcast_lock);
2509 list_for_each_entry(mcast, &obj->mcast_list, list)
2510 if (cmd.mlid == mcast->lid &&
2511 !memcmp(cmd.gid, mcast->gid.raw, sizeof mcast->gid.raw)) {
2512 ret = 0;
2513 goto out_put;
2514 }
2515
2516 mcast = kmalloc(sizeof *mcast, GFP_KERNEL);
2517 if (!mcast) {
2518 ret = -ENOMEM;
2519 goto out_put;
2520 }
2521
2522 mcast->lid = cmd.mlid;
2523 memcpy(mcast->gid.raw, cmd.gid, sizeof mcast->gid.raw);
2524
2525 ret = ib_attach_mcast(qp, &mcast->gid, cmd.mlid);
2526 if (!ret)
2527 list_add_tail(&mcast->list, &obj->mcast_list);
2528 else
2529 kfree(mcast);
2530
2531 out_put:
2532 mutex_unlock(&obj->mcast_lock);
2533 rdma_lookup_put_uobject(&qp->uobject->uevent.uobject,
2534 UVERBS_LOOKUP_READ);
2535
2536 return ret;
2537 }
2538
2539 static int ib_uverbs_detach_mcast(struct uverbs_attr_bundle *attrs)
2540 {
2541 struct ib_uverbs_detach_mcast cmd;
2542 struct ib_uqp_object *obj;
2543 struct ib_qp *qp;
2544 struct ib_uverbs_mcast_entry *mcast;
2545 int ret;
2546 bool found = false;
2547
2548 ret = uverbs_request(attrs, &cmd, sizeof(cmd));
2549 if (ret)
2550 return ret;
2551
2552 qp = uobj_get_obj_read(qp, UVERBS_OBJECT_QP, cmd.qp_handle, attrs);
2553 if (!qp)
2554 return -EINVAL;
2555
2556 obj = qp->uobject;
2557 mutex_lock(&obj->mcast_lock);
2558
2559 list_for_each_entry(mcast, &obj->mcast_list, list)
2560 if (cmd.mlid == mcast->lid &&
2561 !memcmp(cmd.gid, mcast->gid.raw, sizeof mcast->gid.raw)) {
2562 list_del(&mcast->list);
2563 kfree(mcast);
2564 found = true;
2565 break;
2566 }
2567
2568 if (!found) {
2569 ret = -EINVAL;
2570 goto out_put;
2571 }
2572
2573 ret = ib_detach_mcast(qp, (union ib_gid *)cmd.gid, cmd.mlid);
2574
2575 out_put:
2576 mutex_unlock(&obj->mcast_lock);
2577 rdma_lookup_put_uobject(&qp->uobject->uevent.uobject,
2578 UVERBS_LOOKUP_READ);
2579 return ret;
2580 }
2581
2582 struct ib_uflow_resources *flow_resources_alloc(size_t num_specs)
2583 {
2584 struct ib_uflow_resources *resources;
2585
2586 resources = kzalloc(sizeof(*resources), GFP_KERNEL);
2587
2588 if (!resources)
2589 return NULL;
2590
2591 if (!num_specs)
2592 goto out;
2593
2594 resources->counters =
2595 kcalloc(num_specs, sizeof(*resources->counters), GFP_KERNEL);
2596 resources->collection =
2597 kcalloc(num_specs, sizeof(*resources->collection), GFP_KERNEL);
2598
2599 if (!resources->counters || !resources->collection)
2600 goto err;
2601
2602 out:
2603 resources->max = num_specs;
2604 return resources;
2605
2606 err:
2607 kfree(resources->counters);
2608 kfree(resources);
2609
2610 return NULL;
2611 }
2612 EXPORT_SYMBOL(flow_resources_alloc);
2613
2614 void ib_uverbs_flow_resources_free(struct ib_uflow_resources *uflow_res)
2615 {
2616 unsigned int i;
2617
2618 if (!uflow_res)
2619 return;
2620
2621 for (i = 0; i < uflow_res->collection_num; i++)
2622 atomic_dec(&uflow_res->collection[i]->usecnt);
2623
2624 for (i = 0; i < uflow_res->counters_num; i++)
2625 atomic_dec(&uflow_res->counters[i]->usecnt);
2626
2627 kfree(uflow_res->collection);
2628 kfree(uflow_res->counters);
2629 kfree(uflow_res);
2630 }
2631 EXPORT_SYMBOL(ib_uverbs_flow_resources_free);
2632
2633 void flow_resources_add(struct ib_uflow_resources *uflow_res,
2634 enum ib_flow_spec_type type,
2635 void *ibobj)
2636 {
2637 WARN_ON(uflow_res->num >= uflow_res->max);
2638
2639 switch (type) {
2640 case IB_FLOW_SPEC_ACTION_HANDLE:
2641 atomic_inc(&((struct ib_flow_action *)ibobj)->usecnt);
2642 uflow_res->collection[uflow_res->collection_num++] =
2643 (struct ib_flow_action *)ibobj;
2644 break;
2645 case IB_FLOW_SPEC_ACTION_COUNT:
2646 atomic_inc(&((struct ib_counters *)ibobj)->usecnt);
2647 uflow_res->counters[uflow_res->counters_num++] =
2648 (struct ib_counters *)ibobj;
2649 break;
2650 default:
2651 WARN_ON(1);
2652 }
2653
2654 uflow_res->num++;
2655 }
2656 EXPORT_SYMBOL(flow_resources_add);
2657
2658 static int kern_spec_to_ib_spec_action(struct uverbs_attr_bundle *attrs,
2659 struct ib_uverbs_flow_spec *kern_spec,
2660 union ib_flow_spec *ib_spec,
2661 struct ib_uflow_resources *uflow_res)
2662 {
2663 ib_spec->type = kern_spec->type;
2664 switch (ib_spec->type) {
2665 case IB_FLOW_SPEC_ACTION_TAG:
2666 if (kern_spec->flow_tag.size !=
2667 sizeof(struct ib_uverbs_flow_spec_action_tag))
2668 return -EINVAL;
2669
2670 ib_spec->flow_tag.size = sizeof(struct ib_flow_spec_action_tag);
2671 ib_spec->flow_tag.tag_id = kern_spec->flow_tag.tag_id;
2672 break;
2673 case IB_FLOW_SPEC_ACTION_DROP:
2674 if (kern_spec->drop.size !=
2675 sizeof(struct ib_uverbs_flow_spec_action_drop))
2676 return -EINVAL;
2677
2678 ib_spec->drop.size = sizeof(struct ib_flow_spec_action_drop);
2679 break;
2680 case IB_FLOW_SPEC_ACTION_HANDLE:
2681 if (kern_spec->action.size !=
2682 sizeof(struct ib_uverbs_flow_spec_action_handle))
2683 return -EOPNOTSUPP;
2684 ib_spec->action.act = uobj_get_obj_read(flow_action,
2685 UVERBS_OBJECT_FLOW_ACTION,
2686 kern_spec->action.handle,
2687 attrs);
2688 if (!ib_spec->action.act)
2689 return -EINVAL;
2690 ib_spec->action.size =
2691 sizeof(struct ib_flow_spec_action_handle);
2692 flow_resources_add(uflow_res,
2693 IB_FLOW_SPEC_ACTION_HANDLE,
2694 ib_spec->action.act);
2695 uobj_put_obj_read(ib_spec->action.act);
2696 break;
2697 case IB_FLOW_SPEC_ACTION_COUNT:
2698 if (kern_spec->flow_count.size !=
2699 sizeof(struct ib_uverbs_flow_spec_action_count))
2700 return -EINVAL;
2701 ib_spec->flow_count.counters =
2702 uobj_get_obj_read(counters,
2703 UVERBS_OBJECT_COUNTERS,
2704 kern_spec->flow_count.handle,
2705 attrs);
2706 if (!ib_spec->flow_count.counters)
2707 return -EINVAL;
2708 ib_spec->flow_count.size =
2709 sizeof(struct ib_flow_spec_action_count);
2710 flow_resources_add(uflow_res,
2711 IB_FLOW_SPEC_ACTION_COUNT,
2712 ib_spec->flow_count.counters);
2713 uobj_put_obj_read(ib_spec->flow_count.counters);
2714 break;
2715 default:
2716 return -EINVAL;
2717 }
2718 return 0;
2719 }
2720
2721 static ssize_t spec_filter_size(const void *kern_spec_filter, u16 kern_filter_size,
2722 u16 ib_real_filter_sz)
2723 {
2724 /*
2725 * User space filter structures must be 64 bit aligned, otherwise this
2726 * may pass, but we won't handle additional new attributes.
2727 */
2728
2729 if (kern_filter_size > ib_real_filter_sz) {
2730 if (memchr_inv(kern_spec_filter +
2731 ib_real_filter_sz, 0,
2732 kern_filter_size - ib_real_filter_sz))
2733 return -EINVAL;
2734 return ib_real_filter_sz;
2735 }
2736 return kern_filter_size;
2737 }
2738
2739 int ib_uverbs_kern_spec_to_ib_spec_filter(enum ib_flow_spec_type type,
2740 const void *kern_spec_mask,
2741 const void *kern_spec_val,
2742 size_t kern_filter_sz,
2743 union ib_flow_spec *ib_spec)
2744 {
2745 ssize_t actual_filter_sz;
2746 ssize_t ib_filter_sz;
2747
2748 /* User flow spec size must be aligned to 4 bytes */
2749 if (kern_filter_sz != ALIGN(kern_filter_sz, 4))
2750 return -EINVAL;
2751
2752 ib_spec->type = type;
2753
2754 if (ib_spec->type == (IB_FLOW_SPEC_INNER | IB_FLOW_SPEC_VXLAN_TUNNEL))
2755 return -EINVAL;
2756
2757 switch (ib_spec->type & ~IB_FLOW_SPEC_INNER) {
2758 case IB_FLOW_SPEC_ETH:
2759 ib_filter_sz = offsetof(struct ib_flow_eth_filter, real_sz);
2760 actual_filter_sz = spec_filter_size(kern_spec_mask,
2761 kern_filter_sz,
2762 ib_filter_sz);
2763 if (actual_filter_sz <= 0)
2764 return -EINVAL;
2765 ib_spec->size = sizeof(struct ib_flow_spec_eth);
2766 memcpy(&ib_spec->eth.val, kern_spec_val, actual_filter_sz);
2767 memcpy(&ib_spec->eth.mask, kern_spec_mask, actual_filter_sz);
2768 break;
2769 case IB_FLOW_SPEC_IPV4:
2770 ib_filter_sz = offsetof(struct ib_flow_ipv4_filter, real_sz);
2771 actual_filter_sz = spec_filter_size(kern_spec_mask,
2772 kern_filter_sz,
2773 ib_filter_sz);
2774 if (actual_filter_sz <= 0)
2775 return -EINVAL;
2776 ib_spec->size = sizeof(struct ib_flow_spec_ipv4);
2777 memcpy(&ib_spec->ipv4.val, kern_spec_val, actual_filter_sz);
2778 memcpy(&ib_spec->ipv4.mask, kern_spec_mask, actual_filter_sz);
2779 break;
2780 case IB_FLOW_SPEC_IPV6:
2781 ib_filter_sz = offsetof(struct ib_flow_ipv6_filter, real_sz);
2782 actual_filter_sz = spec_filter_size(kern_spec_mask,
2783 kern_filter_sz,
2784 ib_filter_sz);
2785 if (actual_filter_sz <= 0)
2786 return -EINVAL;
2787 ib_spec->size = sizeof(struct ib_flow_spec_ipv6);
2788 memcpy(&ib_spec->ipv6.val, kern_spec_val, actual_filter_sz);
2789 memcpy(&ib_spec->ipv6.mask, kern_spec_mask, actual_filter_sz);
2790
2791 if ((ntohl(ib_spec->ipv6.mask.flow_label)) >= BIT(20) ||
2792 (ntohl(ib_spec->ipv6.val.flow_label)) >= BIT(20))
2793 return -EINVAL;
2794 break;
2795 case IB_FLOW_SPEC_TCP:
2796 case IB_FLOW_SPEC_UDP:
2797 ib_filter_sz = offsetof(struct ib_flow_tcp_udp_filter, real_sz);
2798 actual_filter_sz = spec_filter_size(kern_spec_mask,
2799 kern_filter_sz,
2800 ib_filter_sz);
2801 if (actual_filter_sz <= 0)
2802 return -EINVAL;
2803 ib_spec->size = sizeof(struct ib_flow_spec_tcp_udp);
2804 memcpy(&ib_spec->tcp_udp.val, kern_spec_val, actual_filter_sz);
2805 memcpy(&ib_spec->tcp_udp.mask, kern_spec_mask, actual_filter_sz);
2806 break;
2807 case IB_FLOW_SPEC_VXLAN_TUNNEL:
2808 ib_filter_sz = offsetof(struct ib_flow_tunnel_filter, real_sz);
2809 actual_filter_sz = spec_filter_size(kern_spec_mask,
2810 kern_filter_sz,
2811 ib_filter_sz);
2812 if (actual_filter_sz <= 0)
2813 return -EINVAL;
2814 ib_spec->tunnel.size = sizeof(struct ib_flow_spec_tunnel);
2815 memcpy(&ib_spec->tunnel.val, kern_spec_val, actual_filter_sz);
2816 memcpy(&ib_spec->tunnel.mask, kern_spec_mask, actual_filter_sz);
2817
2818 if ((ntohl(ib_spec->tunnel.mask.tunnel_id)) >= BIT(24) ||
2819 (ntohl(ib_spec->tunnel.val.tunnel_id)) >= BIT(24))
2820 return -EINVAL;
2821 break;
2822 case IB_FLOW_SPEC_ESP:
2823 ib_filter_sz = offsetof(struct ib_flow_esp_filter, real_sz);
2824 actual_filter_sz = spec_filter_size(kern_spec_mask,
2825 kern_filter_sz,
2826 ib_filter_sz);
2827 if (actual_filter_sz <= 0)
2828 return -EINVAL;
2829 ib_spec->esp.size = sizeof(struct ib_flow_spec_esp);
2830 memcpy(&ib_spec->esp.val, kern_spec_val, actual_filter_sz);
2831 memcpy(&ib_spec->esp.mask, kern_spec_mask, actual_filter_sz);
2832 break;
2833 case IB_FLOW_SPEC_GRE:
2834 ib_filter_sz = offsetof(struct ib_flow_gre_filter, real_sz);
2835 actual_filter_sz = spec_filter_size(kern_spec_mask,
2836 kern_filter_sz,
2837 ib_filter_sz);
2838 if (actual_filter_sz <= 0)
2839 return -EINVAL;
2840 ib_spec->gre.size = sizeof(struct ib_flow_spec_gre);
2841 memcpy(&ib_spec->gre.val, kern_spec_val, actual_filter_sz);
2842 memcpy(&ib_spec->gre.mask, kern_spec_mask, actual_filter_sz);
2843 break;
2844 case IB_FLOW_SPEC_MPLS:
2845 ib_filter_sz = offsetof(struct ib_flow_mpls_filter, real_sz);
2846 actual_filter_sz = spec_filter_size(kern_spec_mask,
2847 kern_filter_sz,
2848 ib_filter_sz);
2849 if (actual_filter_sz <= 0)
2850 return -EINVAL;
2851 ib_spec->mpls.size = sizeof(struct ib_flow_spec_mpls);
2852 memcpy(&ib_spec->mpls.val, kern_spec_val, actual_filter_sz);
2853 memcpy(&ib_spec->mpls.mask, kern_spec_mask, actual_filter_sz);
2854 break;
2855 default:
2856 return -EINVAL;
2857 }
2858 return 0;
2859 }
2860
2861 static int kern_spec_to_ib_spec_filter(struct ib_uverbs_flow_spec *kern_spec,
2862 union ib_flow_spec *ib_spec)
2863 {
2864 size_t kern_filter_sz;
2865 void *kern_spec_mask;
2866 void *kern_spec_val;
2867
2868 if (check_sub_overflow((size_t)kern_spec->hdr.size,
2869 sizeof(struct ib_uverbs_flow_spec_hdr),
2870 &kern_filter_sz))
2871 return -EINVAL;
2872
2873 kern_filter_sz /= 2;
2874
2875 kern_spec_val = (void *)kern_spec +
2876 sizeof(struct ib_uverbs_flow_spec_hdr);
2877 kern_spec_mask = kern_spec_val + kern_filter_sz;
2878
2879 return ib_uverbs_kern_spec_to_ib_spec_filter(kern_spec->type,
2880 kern_spec_mask,
2881 kern_spec_val,
2882 kern_filter_sz, ib_spec);
2883 }
2884
2885 static int kern_spec_to_ib_spec(struct uverbs_attr_bundle *attrs,
2886 struct ib_uverbs_flow_spec *kern_spec,
2887 union ib_flow_spec *ib_spec,
2888 struct ib_uflow_resources *uflow_res)
2889 {
2890 if (kern_spec->reserved)
2891 return -EINVAL;
2892
2893 if (kern_spec->type >= IB_FLOW_SPEC_ACTION_TAG)
2894 return kern_spec_to_ib_spec_action(attrs, kern_spec, ib_spec,
2895 uflow_res);
2896 else
2897 return kern_spec_to_ib_spec_filter(kern_spec, ib_spec);
2898 }
2899
2900 static int ib_uverbs_ex_create_wq(struct uverbs_attr_bundle *attrs)
2901 {
2902 struct ib_uverbs_ex_create_wq cmd;
2903 struct ib_uverbs_ex_create_wq_resp resp = {};
2904 struct ib_uwq_object *obj;
2905 int err = 0;
2906 struct ib_cq *cq;
2907 struct ib_pd *pd;
2908 struct ib_wq *wq;
2909 struct ib_wq_init_attr wq_init_attr = {};
2910 struct ib_device *ib_dev;
2911
2912 err = uverbs_request(attrs, &cmd, sizeof(cmd));
2913 if (err)
2914 return err;
2915
2916 if (cmd.comp_mask)
2917 return -EOPNOTSUPP;
2918
2919 obj = (struct ib_uwq_object *)uobj_alloc(UVERBS_OBJECT_WQ, attrs,
2920 &ib_dev);
2921 if (IS_ERR(obj))
2922 return PTR_ERR(obj);
2923
2924 pd = uobj_get_obj_read(pd, UVERBS_OBJECT_PD, cmd.pd_handle, attrs);
2925 if (!pd) {
2926 err = -EINVAL;
2927 goto err_uobj;
2928 }
2929
2930 cq = uobj_get_obj_read(cq, UVERBS_OBJECT_CQ, cmd.cq_handle, attrs);
2931 if (!cq) {
2932 err = -EINVAL;
2933 goto err_put_pd;
2934 }
2935
2936 wq_init_attr.cq = cq;
2937 wq_init_attr.max_sge = cmd.max_sge;
2938 wq_init_attr.max_wr = cmd.max_wr;
2939 wq_init_attr.wq_type = cmd.wq_type;
2940 wq_init_attr.event_handler = ib_uverbs_wq_event_handler;
2941 wq_init_attr.create_flags = cmd.create_flags;
2942 INIT_LIST_HEAD(&obj->uevent.event_list);
2943 obj->uevent.uobject.user_handle = cmd.user_handle;
2944
2945 wq = pd->device->ops.create_wq(pd, &wq_init_attr, &attrs->driver_udata);
2946 if (IS_ERR(wq)) {
2947 err = PTR_ERR(wq);
2948 goto err_put_cq;
2949 }
2950
2951 wq->uobject = obj;
2952 obj->uevent.uobject.object = wq;
2953 wq->wq_type = wq_init_attr.wq_type;
2954 wq->cq = cq;
2955 wq->pd = pd;
2956 wq->device = pd->device;
2957 atomic_set(&wq->usecnt, 0);
2958 atomic_inc(&pd->usecnt);
2959 atomic_inc(&cq->usecnt);
2960 obj->uevent.event_file = READ_ONCE(attrs->ufile->default_async_file);
2961 if (obj->uevent.event_file)
2962 uverbs_uobject_get(&obj->uevent.event_file->uobj);
2963
2964 uobj_put_obj_read(pd);
2965 rdma_lookup_put_uobject(&cq->uobject->uevent.uobject,
2966 UVERBS_LOOKUP_READ);
2967 uobj_finalize_uobj_create(&obj->uevent.uobject, attrs);
2968
2969 resp.wq_handle = obj->uevent.uobject.id;
2970 resp.max_sge = wq_init_attr.max_sge;
2971 resp.max_wr = wq_init_attr.max_wr;
2972 resp.wqn = wq->wq_num;
2973 resp.response_length = uverbs_response_length(attrs, sizeof(resp));
2974 return uverbs_response(attrs, &resp, sizeof(resp));
2975
2976 err_put_cq:
2977 rdma_lookup_put_uobject(&cq->uobject->uevent.uobject,
2978 UVERBS_LOOKUP_READ);
2979 err_put_pd:
2980 uobj_put_obj_read(pd);
2981 err_uobj:
2982 uobj_alloc_abort(&obj->uevent.uobject, attrs);
2983
2984 return err;
2985 }
2986
2987 static int ib_uverbs_ex_destroy_wq(struct uverbs_attr_bundle *attrs)
2988 {
2989 struct ib_uverbs_ex_destroy_wq cmd;
2990 struct ib_uverbs_ex_destroy_wq_resp resp = {};
2991 struct ib_uobject *uobj;
2992 struct ib_uwq_object *obj;
2993 int ret;
2994
2995 ret = uverbs_request(attrs, &cmd, sizeof(cmd));
2996 if (ret)
2997 return ret;
2998
2999 if (cmd.comp_mask)
3000 return -EOPNOTSUPP;
3001
3002 resp.response_length = uverbs_response_length(attrs, sizeof(resp));
3003 uobj = uobj_get_destroy(UVERBS_OBJECT_WQ, cmd.wq_handle, attrs);
3004 if (IS_ERR(uobj))
3005 return PTR_ERR(uobj);
3006
3007 obj = container_of(uobj, struct ib_uwq_object, uevent.uobject);
3008 resp.events_reported = obj->uevent.events_reported;
3009
3010 uobj_put_destroy(uobj);
3011
3012 return uverbs_response(attrs, &resp, sizeof(resp));
3013 }
3014
3015 static int ib_uverbs_ex_modify_wq(struct uverbs_attr_bundle *attrs)
3016 {
3017 struct ib_uverbs_ex_modify_wq cmd;
3018 struct ib_wq *wq;
3019 struct ib_wq_attr wq_attr = {};
3020 int ret;
3021
3022 ret = uverbs_request(attrs, &cmd, sizeof(cmd));
3023 if (ret)
3024 return ret;
3025
3026 if (!cmd.attr_mask)
3027 return -EINVAL;
3028
3029 if (cmd.attr_mask > (IB_WQ_STATE | IB_WQ_CUR_STATE | IB_WQ_FLAGS))
3030 return -EINVAL;
3031
3032 wq = uobj_get_obj_read(wq, UVERBS_OBJECT_WQ, cmd.wq_handle, attrs);
3033 if (!wq)
3034 return -EINVAL;
3035
3036 wq_attr.curr_wq_state = cmd.curr_wq_state;
3037 wq_attr.wq_state = cmd.wq_state;
3038 if (cmd.attr_mask & IB_WQ_FLAGS) {
3039 wq_attr.flags = cmd.flags;
3040 wq_attr.flags_mask = cmd.flags_mask;
3041 }
3042 ret = wq->device->ops.modify_wq(wq, &wq_attr, cmd.attr_mask,
3043 &attrs->driver_udata);
3044 rdma_lookup_put_uobject(&wq->uobject->uevent.uobject,
3045 UVERBS_LOOKUP_READ);
3046 return ret;
3047 }
3048
3049 static int ib_uverbs_ex_create_rwq_ind_table(struct uverbs_attr_bundle *attrs)
3050 {
3051 struct ib_uverbs_ex_create_rwq_ind_table cmd;
3052 struct ib_uverbs_ex_create_rwq_ind_table_resp resp = {};
3053 struct ib_uobject *uobj;
3054 int err;
3055 struct ib_rwq_ind_table_init_attr init_attr = {};
3056 struct ib_rwq_ind_table *rwq_ind_tbl;
3057 struct ib_wq **wqs = NULL;
3058 u32 *wqs_handles = NULL;
3059 struct ib_wq *wq = NULL;
3060 int i, num_read_wqs;
3061 u32 num_wq_handles;
3062 struct uverbs_req_iter iter;
3063 struct ib_device *ib_dev;
3064
3065 err = uverbs_request_start(attrs, &iter, &cmd, sizeof(cmd));
3066 if (err)
3067 return err;
3068
3069 if (cmd.comp_mask)
3070 return -EOPNOTSUPP;
3071
3072 if (cmd.log_ind_tbl_size > IB_USER_VERBS_MAX_LOG_IND_TBL_SIZE)
3073 return -EINVAL;
3074
3075 num_wq_handles = 1 << cmd.log_ind_tbl_size;
3076 wqs_handles = kcalloc(num_wq_handles, sizeof(*wqs_handles),
3077 GFP_KERNEL);
3078 if (!wqs_handles)
3079 return -ENOMEM;
3080
3081 err = uverbs_request_next(&iter, wqs_handles,
3082 num_wq_handles * sizeof(__u32));
3083 if (err)
3084 goto err_free;
3085
3086 err = uverbs_request_finish(&iter);
3087 if (err)
3088 goto err_free;
3089
3090 wqs = kcalloc(num_wq_handles, sizeof(*wqs), GFP_KERNEL);
3091 if (!wqs) {
3092 err = -ENOMEM;
3093 goto err_free;
3094 }
3095
3096 for (num_read_wqs = 0; num_read_wqs < num_wq_handles;
3097 num_read_wqs++) {
3098 wq = uobj_get_obj_read(wq, UVERBS_OBJECT_WQ,
3099 wqs_handles[num_read_wqs], attrs);
3100 if (!wq) {
3101 err = -EINVAL;
3102 goto put_wqs;
3103 }
3104
3105 wqs[num_read_wqs] = wq;
3106 atomic_inc(&wqs[num_read_wqs]->usecnt);
3107 }
3108
3109 uobj = uobj_alloc(UVERBS_OBJECT_RWQ_IND_TBL, attrs, &ib_dev);
3110 if (IS_ERR(uobj)) {
3111 err = PTR_ERR(uobj);
3112 goto put_wqs;
3113 }
3114
3115 rwq_ind_tbl = rdma_zalloc_drv_obj(ib_dev, ib_rwq_ind_table);
3116 if (!rwq_ind_tbl) {
3117 err = -ENOMEM;
3118 goto err_uobj;
3119 }
3120
3121 init_attr.log_ind_tbl_size = cmd.log_ind_tbl_size;
3122 init_attr.ind_tbl = wqs;
3123
3124 rwq_ind_tbl->ind_tbl = wqs;
3125 rwq_ind_tbl->log_ind_tbl_size = init_attr.log_ind_tbl_size;
3126 rwq_ind_tbl->uobject = uobj;
3127 uobj->object = rwq_ind_tbl;
3128 rwq_ind_tbl->device = ib_dev;
3129 atomic_set(&rwq_ind_tbl->usecnt, 0);
3130
3131 err = ib_dev->ops.create_rwq_ind_table(rwq_ind_tbl, &init_attr,
3132 &attrs->driver_udata);
3133 if (err)
3134 goto err_create;
3135
3136 for (i = 0; i < num_wq_handles; i++)
3137 rdma_lookup_put_uobject(&wqs[i]->uobject->uevent.uobject,
3138 UVERBS_LOOKUP_READ);
3139 kfree(wqs_handles);
3140 uobj_finalize_uobj_create(uobj, attrs);
3141
3142 resp.ind_tbl_handle = uobj->id;
3143 resp.ind_tbl_num = rwq_ind_tbl->ind_tbl_num;
3144 resp.response_length = uverbs_response_length(attrs, sizeof(resp));
3145 return uverbs_response(attrs, &resp, sizeof(resp));
3146
3147 err_create:
3148 kfree(rwq_ind_tbl);
3149 err_uobj:
3150 uobj_alloc_abort(uobj, attrs);
3151 put_wqs:
3152 for (i = 0; i < num_read_wqs; i++) {
3153 rdma_lookup_put_uobject(&wqs[i]->uobject->uevent.uobject,
3154 UVERBS_LOOKUP_READ);
3155 atomic_dec(&wqs[i]->usecnt);
3156 }
3157 err_free:
3158 kfree(wqs_handles);
3159 kfree(wqs);
3160 return err;
3161 }
3162
3163 static int ib_uverbs_ex_destroy_rwq_ind_table(struct uverbs_attr_bundle *attrs)
3164 {
3165 struct ib_uverbs_ex_destroy_rwq_ind_table cmd;
3166 int ret;
3167
3168 ret = uverbs_request(attrs, &cmd, sizeof(cmd));
3169 if (ret)
3170 return ret;
3171
3172 if (cmd.comp_mask)
3173 return -EOPNOTSUPP;
3174
3175 return uobj_perform_destroy(UVERBS_OBJECT_RWQ_IND_TBL,
3176 cmd.ind_tbl_handle, attrs);
3177 }
3178
3179 static int ib_uverbs_ex_create_flow(struct uverbs_attr_bundle *attrs)
3180 {
3181 struct ib_uverbs_create_flow cmd;
3182 struct ib_uverbs_create_flow_resp resp = {};
3183 struct ib_uobject *uobj;
3184 struct ib_flow *flow_id;
3185 struct ib_uverbs_flow_attr *kern_flow_attr;
3186 struct ib_flow_attr *flow_attr;
3187 struct ib_qp *qp;
3188 struct ib_uflow_resources *uflow_res;
3189 struct ib_uverbs_flow_spec_hdr *kern_spec;
3190 struct uverbs_req_iter iter;
3191 int err;
3192 void *ib_spec;
3193 int i;
3194 struct ib_device *ib_dev;
3195
3196 err = uverbs_request_start(attrs, &iter, &cmd, sizeof(cmd));
3197 if (err)
3198 return err;
3199
3200 if (cmd.comp_mask)
3201 return -EINVAL;
3202
3203 if (!capable(CAP_NET_RAW))
3204 return -EPERM;
3205
3206 if (cmd.flow_attr.flags >= IB_FLOW_ATTR_FLAGS_RESERVED)
3207 return -EINVAL;
3208
3209 if ((cmd.flow_attr.flags & IB_FLOW_ATTR_FLAGS_DONT_TRAP) &&
3210 ((cmd.flow_attr.type == IB_FLOW_ATTR_ALL_DEFAULT) ||
3211 (cmd.flow_attr.type == IB_FLOW_ATTR_MC_DEFAULT)))
3212 return -EINVAL;
3213
3214 if (cmd.flow_attr.num_of_specs > IB_FLOW_SPEC_SUPPORT_LAYERS)
3215 return -EINVAL;
3216
3217 if (cmd.flow_attr.size >
3218 (cmd.flow_attr.num_of_specs * sizeof(struct ib_uverbs_flow_spec)))
3219 return -EINVAL;
3220
3221 if (cmd.flow_attr.reserved[0] ||
3222 cmd.flow_attr.reserved[1])
3223 return -EINVAL;
3224
3225 if (cmd.flow_attr.num_of_specs) {
3226 kern_flow_attr = kmalloc(sizeof(*kern_flow_attr) + cmd.flow_attr.size,
3227 GFP_KERNEL);
3228 if (!kern_flow_attr)
3229 return -ENOMEM;
3230
3231 *kern_flow_attr = cmd.flow_attr;
3232 err = uverbs_request_next(&iter, &kern_flow_attr->flow_specs,
3233 cmd.flow_attr.size);
3234 if (err)
3235 goto err_free_attr;
3236 } else {
3237 kern_flow_attr = &cmd.flow_attr;
3238 }
3239
3240 err = uverbs_request_finish(&iter);
3241 if (err)
3242 goto err_free_attr;
3243
3244 uobj = uobj_alloc(UVERBS_OBJECT_FLOW, attrs, &ib_dev);
3245 if (IS_ERR(uobj)) {
3246 err = PTR_ERR(uobj);
3247 goto err_free_attr;
3248 }
3249
3250 qp = uobj_get_obj_read(qp, UVERBS_OBJECT_QP, cmd.qp_handle, attrs);
3251 if (!qp) {
3252 err = -EINVAL;
3253 goto err_uobj;
3254 }
3255
3256 if (qp->qp_type != IB_QPT_UD && qp->qp_type != IB_QPT_RAW_PACKET) {
3257 err = -EINVAL;
3258 goto err_put;
3259 }
3260
3261 flow_attr = kzalloc(struct_size(flow_attr, flows,
3262 cmd.flow_attr.num_of_specs), GFP_KERNEL);
3263 if (!flow_attr) {
3264 err = -ENOMEM;
3265 goto err_put;
3266 }
3267 uflow_res = flow_resources_alloc(cmd.flow_attr.num_of_specs);
3268 if (!uflow_res) {
3269 err = -ENOMEM;
3270 goto err_free_flow_attr;
3271 }
3272
3273 flow_attr->type = kern_flow_attr->type;
3274 flow_attr->priority = kern_flow_attr->priority;
3275 flow_attr->num_of_specs = kern_flow_attr->num_of_specs;
3276 flow_attr->port = kern_flow_attr->port;
3277 flow_attr->flags = kern_flow_attr->flags;
3278 flow_attr->size = sizeof(*flow_attr);
3279
3280 kern_spec = kern_flow_attr->flow_specs;
3281 ib_spec = flow_attr + 1;
3282 for (i = 0; i < flow_attr->num_of_specs &&
3283 cmd.flow_attr.size >= sizeof(*kern_spec) &&
3284 cmd.flow_attr.size >= kern_spec->size;
3285 i++) {
3286 err = kern_spec_to_ib_spec(
3287 attrs, (struct ib_uverbs_flow_spec *)kern_spec,
3288 ib_spec, uflow_res);
3289 if (err)
3290 goto err_free;
3291
3292 flow_attr->size +=
3293 ((union ib_flow_spec *) ib_spec)->size;
3294 cmd.flow_attr.size -= kern_spec->size;
3295 kern_spec = ((void *)kern_spec) + kern_spec->size;
3296 ib_spec += ((union ib_flow_spec *) ib_spec)->size;
3297 }
3298 if (cmd.flow_attr.size || (i != flow_attr->num_of_specs)) {
3299 pr_warn("create flow failed, flow %d: %d bytes left from uverb cmd\n",
3300 i, cmd.flow_attr.size);
3301 err = -EINVAL;
3302 goto err_free;
3303 }
3304
3305 flow_id = qp->device->ops.create_flow(qp, flow_attr,
3306 &attrs->driver_udata);
3307
3308 if (IS_ERR(flow_id)) {
3309 err = PTR_ERR(flow_id);
3310 goto err_free;
3311 }
3312
3313 ib_set_flow(uobj, flow_id, qp, qp->device, uflow_res);
3314
3315 rdma_lookup_put_uobject(&qp->uobject->uevent.uobject,
3316 UVERBS_LOOKUP_READ);
3317 kfree(flow_attr);
3318
3319 if (cmd.flow_attr.num_of_specs)
3320 kfree(kern_flow_attr);
3321 uobj_finalize_uobj_create(uobj, attrs);
3322
3323 resp.flow_handle = uobj->id;
3324 return uverbs_response(attrs, &resp, sizeof(resp));
3325
3326 err_free:
3327 ib_uverbs_flow_resources_free(uflow_res);
3328 err_free_flow_attr:
3329 kfree(flow_attr);
3330 err_put:
3331 rdma_lookup_put_uobject(&qp->uobject->uevent.uobject,
3332 UVERBS_LOOKUP_READ);
3333 err_uobj:
3334 uobj_alloc_abort(uobj, attrs);
3335 err_free_attr:
3336 if (cmd.flow_attr.num_of_specs)
3337 kfree(kern_flow_attr);
3338 return err;
3339 }
3340
3341 static int ib_uverbs_ex_destroy_flow(struct uverbs_attr_bundle *attrs)
3342 {
3343 struct ib_uverbs_destroy_flow cmd;
3344 int ret;
3345
3346 ret = uverbs_request(attrs, &cmd, sizeof(cmd));
3347 if (ret)
3348 return ret;
3349
3350 if (cmd.comp_mask)
3351 return -EINVAL;
3352
3353 return uobj_perform_destroy(UVERBS_OBJECT_FLOW, cmd.flow_handle, attrs);
3354 }
3355
3356 static int __uverbs_create_xsrq(struct uverbs_attr_bundle *attrs,
3357 struct ib_uverbs_create_xsrq *cmd,
3358 struct ib_udata *udata)
3359 {
3360 struct ib_uverbs_create_srq_resp resp = {};
3361 struct ib_usrq_object *obj;
3362 struct ib_pd *pd;
3363 struct ib_srq *srq;
3364 struct ib_srq_init_attr attr;
3365 int ret;
3366 struct ib_uobject *xrcd_uobj;
3367 struct ib_device *ib_dev;
3368
3369 obj = (struct ib_usrq_object *)uobj_alloc(UVERBS_OBJECT_SRQ, attrs,
3370 &ib_dev);
3371 if (IS_ERR(obj))
3372 return PTR_ERR(obj);
3373
3374 if (cmd->srq_type == IB_SRQT_TM)
3375 attr.ext.tag_matching.max_num_tags = cmd->max_num_tags;
3376
3377 if (cmd->srq_type == IB_SRQT_XRC) {
3378 xrcd_uobj = uobj_get_read(UVERBS_OBJECT_XRCD, cmd->xrcd_handle,
3379 attrs);
3380 if (IS_ERR(xrcd_uobj)) {
3381 ret = -EINVAL;
3382 goto err;
3383 }
3384
3385 attr.ext.xrc.xrcd = (struct ib_xrcd *)xrcd_uobj->object;
3386 if (!attr.ext.xrc.xrcd) {
3387 ret = -EINVAL;
3388 goto err_put_xrcd;
3389 }
3390
3391 obj->uxrcd = container_of(xrcd_uobj, struct ib_uxrcd_object, uobject);
3392 atomic_inc(&obj->uxrcd->refcnt);
3393 }
3394
3395 if (ib_srq_has_cq(cmd->srq_type)) {
3396 attr.ext.cq = uobj_get_obj_read(cq, UVERBS_OBJECT_CQ,
3397 cmd->cq_handle, attrs);
3398 if (!attr.ext.cq) {
3399 ret = -EINVAL;
3400 goto err_put_xrcd;
3401 }
3402 }
3403
3404 pd = uobj_get_obj_read(pd, UVERBS_OBJECT_PD, cmd->pd_handle, attrs);
3405 if (!pd) {
3406 ret = -EINVAL;
3407 goto err_put_cq;
3408 }
3409
3410 attr.event_handler = ib_uverbs_srq_event_handler;
3411 attr.srq_type = cmd->srq_type;
3412 attr.attr.max_wr = cmd->max_wr;
3413 attr.attr.max_sge = cmd->max_sge;
3414 attr.attr.srq_limit = cmd->srq_limit;
3415
3416 INIT_LIST_HEAD(&obj->uevent.event_list);
3417 obj->uevent.uobject.user_handle = cmd->user_handle;
3418
3419 srq = ib_create_srq_user(pd, &attr, obj, udata);
3420 if (IS_ERR(srq)) {
3421 ret = PTR_ERR(srq);
3422 goto err_put_pd;
3423 }
3424
3425 obj->uevent.uobject.object = srq;
3426 obj->uevent.uobject.user_handle = cmd->user_handle;
3427 obj->uevent.event_file = READ_ONCE(attrs->ufile->default_async_file);
3428 if (obj->uevent.event_file)
3429 uverbs_uobject_get(&obj->uevent.event_file->uobj);
3430
3431 if (cmd->srq_type == IB_SRQT_XRC)
3432 resp.srqn = srq->ext.xrc.srq_num;
3433
3434 if (cmd->srq_type == IB_SRQT_XRC)
3435 uobj_put_read(xrcd_uobj);
3436
3437 if (ib_srq_has_cq(cmd->srq_type))
3438 rdma_lookup_put_uobject(&attr.ext.cq->uobject->uevent.uobject,
3439 UVERBS_LOOKUP_READ);
3440
3441 uobj_put_obj_read(pd);
3442 uobj_finalize_uobj_create(&obj->uevent.uobject, attrs);
3443
3444 resp.srq_handle = obj->uevent.uobject.id;
3445 resp.max_wr = attr.attr.max_wr;
3446 resp.max_sge = attr.attr.max_sge;
3447 return uverbs_response(attrs, &resp, sizeof(resp));
3448
3449 err_put_pd:
3450 uobj_put_obj_read(pd);
3451 err_put_cq:
3452 if (ib_srq_has_cq(cmd->srq_type))
3453 rdma_lookup_put_uobject(&attr.ext.cq->uobject->uevent.uobject,
3454 UVERBS_LOOKUP_READ);
3455
3456 err_put_xrcd:
3457 if (cmd->srq_type == IB_SRQT_XRC) {
3458 atomic_dec(&obj->uxrcd->refcnt);
3459 uobj_put_read(xrcd_uobj);
3460 }
3461
3462 err:
3463 uobj_alloc_abort(&obj->uevent.uobject, attrs);
3464 return ret;
3465 }
3466
3467 static int ib_uverbs_create_srq(struct uverbs_attr_bundle *attrs)
3468 {
3469 struct ib_uverbs_create_srq cmd;
3470 struct ib_uverbs_create_xsrq xcmd;
3471 int ret;
3472
3473 ret = uverbs_request(attrs, &cmd, sizeof(cmd));
3474 if (ret)
3475 return ret;
3476
3477 memset(&xcmd, 0, sizeof(xcmd));
3478 xcmd.response = cmd.response;
3479 xcmd.user_handle = cmd.user_handle;
3480 xcmd.srq_type = IB_SRQT_BASIC;
3481 xcmd.pd_handle = cmd.pd_handle;
3482 xcmd.max_wr = cmd.max_wr;
3483 xcmd.max_sge = cmd.max_sge;
3484 xcmd.srq_limit = cmd.srq_limit;
3485
3486 return __uverbs_create_xsrq(attrs, &xcmd, &attrs->driver_udata);
3487 }
3488
3489 static int ib_uverbs_create_xsrq(struct uverbs_attr_bundle *attrs)
3490 {
3491 struct ib_uverbs_create_xsrq cmd;
3492 int ret;
3493
3494 ret = uverbs_request(attrs, &cmd, sizeof(cmd));
3495 if (ret)
3496 return ret;
3497
3498 return __uverbs_create_xsrq(attrs, &cmd, &attrs->driver_udata);
3499 }
3500
3501 static int ib_uverbs_modify_srq(struct uverbs_attr_bundle *attrs)
3502 {
3503 struct ib_uverbs_modify_srq cmd;
3504 struct ib_srq *srq;
3505 struct ib_srq_attr attr;
3506 int ret;
3507
3508 ret = uverbs_request(attrs, &cmd, sizeof(cmd));
3509 if (ret)
3510 return ret;
3511
3512 srq = uobj_get_obj_read(srq, UVERBS_OBJECT_SRQ, cmd.srq_handle, attrs);
3513 if (!srq)
3514 return -EINVAL;
3515
3516 attr.max_wr = cmd.max_wr;
3517 attr.srq_limit = cmd.srq_limit;
3518
3519 ret = srq->device->ops.modify_srq(srq, &attr, cmd.attr_mask,
3520 &attrs->driver_udata);
3521
3522 rdma_lookup_put_uobject(&srq->uobject->uevent.uobject,
3523 UVERBS_LOOKUP_READ);
3524
3525 return ret;
3526 }
3527
3528 static int ib_uverbs_query_srq(struct uverbs_attr_bundle *attrs)
3529 {
3530 struct ib_uverbs_query_srq cmd;
3531 struct ib_uverbs_query_srq_resp resp;
3532 struct ib_srq_attr attr;
3533 struct ib_srq *srq;
3534 int ret;
3535
3536 ret = uverbs_request(attrs, &cmd, sizeof(cmd));
3537 if (ret)
3538 return ret;
3539
3540 srq = uobj_get_obj_read(srq, UVERBS_OBJECT_SRQ, cmd.srq_handle, attrs);
3541 if (!srq)
3542 return -EINVAL;
3543
3544 ret = ib_query_srq(srq, &attr);
3545
3546 rdma_lookup_put_uobject(&srq->uobject->uevent.uobject,
3547 UVERBS_LOOKUP_READ);
3548
3549 if (ret)
3550 return ret;
3551
3552 memset(&resp, 0, sizeof resp);
3553
3554 resp.max_wr = attr.max_wr;
3555 resp.max_sge = attr.max_sge;
3556 resp.srq_limit = attr.srq_limit;
3557
3558 return uverbs_response(attrs, &resp, sizeof(resp));
3559 }
3560
3561 static int ib_uverbs_destroy_srq(struct uverbs_attr_bundle *attrs)
3562 {
3563 struct ib_uverbs_destroy_srq cmd;
3564 struct ib_uverbs_destroy_srq_resp resp;
3565 struct ib_uobject *uobj;
3566 struct ib_uevent_object *obj;
3567 int ret;
3568
3569 ret = uverbs_request(attrs, &cmd, sizeof(cmd));
3570 if (ret)
3571 return ret;
3572
3573 uobj = uobj_get_destroy(UVERBS_OBJECT_SRQ, cmd.srq_handle, attrs);
3574 if (IS_ERR(uobj))
3575 return PTR_ERR(uobj);
3576
3577 obj = container_of(uobj, struct ib_uevent_object, uobject);
3578 memset(&resp, 0, sizeof(resp));
3579 resp.events_reported = obj->events_reported;
3580
3581 uobj_put_destroy(uobj);
3582
3583 return uverbs_response(attrs, &resp, sizeof(resp));
3584 }
3585
3586 static int ib_uverbs_ex_query_device(struct uverbs_attr_bundle *attrs)
3587 {
3588 struct ib_uverbs_ex_query_device_resp resp = {};
3589 struct ib_uverbs_ex_query_device cmd;
3590 struct ib_device_attr attr = {0};
3591 struct ib_ucontext *ucontext;
3592 struct ib_device *ib_dev;
3593 int err;
3594
3595 ucontext = ib_uverbs_get_ucontext(attrs);
3596 if (IS_ERR(ucontext))
3597 return PTR_ERR(ucontext);
3598 ib_dev = ucontext->device;
3599
3600 err = uverbs_request(attrs, &cmd, sizeof(cmd));
3601 if (err)
3602 return err;
3603
3604 if (cmd.comp_mask)
3605 return -EINVAL;
3606
3607 if (cmd.reserved)
3608 return -EINVAL;
3609
3610 err = ib_dev->ops.query_device(ib_dev, &attr, &attrs->driver_udata);
3611 if (err)
3612 return err;
3613
3614 copy_query_dev_fields(ucontext, &resp.base, &attr);
3615
3616 resp.odp_caps.general_caps = attr.odp_caps.general_caps;
3617 resp.odp_caps.per_transport_caps.rc_odp_caps =
3618 attr.odp_caps.per_transport_caps.rc_odp_caps;
3619 resp.odp_caps.per_transport_caps.uc_odp_caps =
3620 attr.odp_caps.per_transport_caps.uc_odp_caps;
3621 resp.odp_caps.per_transport_caps.ud_odp_caps =
3622 attr.odp_caps.per_transport_caps.ud_odp_caps;
3623 resp.xrc_odp_caps = attr.odp_caps.per_transport_caps.xrc_odp_caps;
3624
3625 resp.timestamp_mask = attr.timestamp_mask;
3626 resp.hca_core_clock = attr.hca_core_clock;
3627 resp.device_cap_flags_ex = attr.device_cap_flags;
3628 resp.rss_caps.supported_qpts = attr.rss_caps.supported_qpts;
3629 resp.rss_caps.max_rwq_indirection_tables =
3630 attr.rss_caps.max_rwq_indirection_tables;
3631 resp.rss_caps.max_rwq_indirection_table_size =
3632 attr.rss_caps.max_rwq_indirection_table_size;
3633 resp.max_wq_type_rq = attr.max_wq_type_rq;
3634 resp.raw_packet_caps = attr.raw_packet_caps;
3635 resp.tm_caps.max_rndv_hdr_size = attr.tm_caps.max_rndv_hdr_size;
3636 resp.tm_caps.max_num_tags = attr.tm_caps.max_num_tags;
3637 resp.tm_caps.max_ops = attr.tm_caps.max_ops;
3638 resp.tm_caps.max_sge = attr.tm_caps.max_sge;
3639 resp.tm_caps.flags = attr.tm_caps.flags;
3640 resp.cq_moderation_caps.max_cq_moderation_count =
3641 attr.cq_caps.max_cq_moderation_count;
3642 resp.cq_moderation_caps.max_cq_moderation_period =
3643 attr.cq_caps.max_cq_moderation_period;
3644 resp.max_dm_size = attr.max_dm_size;
3645 resp.response_length = uverbs_response_length(attrs, sizeof(resp));
3646
3647 return uverbs_response(attrs, &resp, sizeof(resp));
3648 }
3649
3650 static int ib_uverbs_ex_modify_cq(struct uverbs_attr_bundle *attrs)
3651 {
3652 struct ib_uverbs_ex_modify_cq cmd;
3653 struct ib_cq *cq;
3654 int ret;
3655
3656 ret = uverbs_request(attrs, &cmd, sizeof(cmd));
3657 if (ret)
3658 return ret;
3659
3660 if (!cmd.attr_mask || cmd.reserved)
3661 return -EINVAL;
3662
3663 if (cmd.attr_mask > IB_CQ_MODERATE)
3664 return -EOPNOTSUPP;
3665
3666 cq = uobj_get_obj_read(cq, UVERBS_OBJECT_CQ, cmd.cq_handle, attrs);
3667 if (!cq)
3668 return -EINVAL;
3669
3670 ret = rdma_set_cq_moderation(cq, cmd.attr.cq_count, cmd.attr.cq_period);
3671
3672 rdma_lookup_put_uobject(&cq->uobject->uevent.uobject,
3673 UVERBS_LOOKUP_READ);
3674 return ret;
3675 }
3676
3677 /*
3678 * Describe the input structs for write(). Some write methods have an input
3679 * only struct, most have an input and output. If the struct has an output then
3680 * the 'response' u64 must be the first field in the request structure.
3681 *
3682 * If udata is present then both the request and response structs have a
3683 * trailing driver_data flex array. In this case the size of the base struct
3684 * cannot be changed.
3685 */
3686 #define UAPI_DEF_WRITE_IO(req, resp) \
3687 .write.has_resp = 1 + \
3688 BUILD_BUG_ON_ZERO(offsetof(req, response) != 0) + \
3689 BUILD_BUG_ON_ZERO(sizeof_field(req, response) != \
3690 sizeof(u64)), \
3691 .write.req_size = sizeof(req), .write.resp_size = sizeof(resp)
3692
3693 #define UAPI_DEF_WRITE_I(req) .write.req_size = sizeof(req)
3694
3695 #define UAPI_DEF_WRITE_UDATA_IO(req, resp) \
3696 UAPI_DEF_WRITE_IO(req, resp), \
3697 .write.has_udata = \
3698 1 + \
3699 BUILD_BUG_ON_ZERO(offsetof(req, driver_data) != \
3700 sizeof(req)) + \
3701 BUILD_BUG_ON_ZERO(offsetof(resp, driver_data) != \
3702 sizeof(resp))
3703
3704 #define UAPI_DEF_WRITE_UDATA_I(req) \
3705 UAPI_DEF_WRITE_I(req), \
3706 .write.has_udata = \
3707 1 + BUILD_BUG_ON_ZERO(offsetof(req, driver_data) != \
3708 sizeof(req))
3709
3710 /*
3711 * The _EX versions are for use with WRITE_EX and allow the last struct member
3712 * to be specified. Buffers that do not include that member will be rejected.
3713 */
3714 #define UAPI_DEF_WRITE_IO_EX(req, req_last_member, resp, resp_last_member) \
3715 .write.has_resp = 1, \
3716 .write.req_size = offsetofend(req, req_last_member), \
3717 .write.resp_size = offsetofend(resp, resp_last_member)
3718
3719 #define UAPI_DEF_WRITE_I_EX(req, req_last_member) \
3720 .write.req_size = offsetofend(req, req_last_member)
3721
3722 const struct uapi_definition uverbs_def_write_intf[] = {
3723 DECLARE_UVERBS_OBJECT(
3724 UVERBS_OBJECT_AH,
3725 DECLARE_UVERBS_WRITE(IB_USER_VERBS_CMD_CREATE_AH,
3726 ib_uverbs_create_ah,
3727 UAPI_DEF_WRITE_UDATA_IO(
3728 struct ib_uverbs_create_ah,
3729 struct ib_uverbs_create_ah_resp)),
3730 DECLARE_UVERBS_WRITE(
3731 IB_USER_VERBS_CMD_DESTROY_AH,
3732 ib_uverbs_destroy_ah,
3733 UAPI_DEF_WRITE_I(struct ib_uverbs_destroy_ah)),
3734 UAPI_DEF_OBJ_NEEDS_FN(create_user_ah),
3735 UAPI_DEF_OBJ_NEEDS_FN(destroy_ah)),
3736
3737 DECLARE_UVERBS_OBJECT(
3738 UVERBS_OBJECT_COMP_CHANNEL,
3739 DECLARE_UVERBS_WRITE(
3740 IB_USER_VERBS_CMD_CREATE_COMP_CHANNEL,
3741 ib_uverbs_create_comp_channel,
3742 UAPI_DEF_WRITE_IO(
3743 struct ib_uverbs_create_comp_channel,
3744 struct ib_uverbs_create_comp_channel_resp))),
3745
3746 DECLARE_UVERBS_OBJECT(
3747 UVERBS_OBJECT_CQ,
3748 DECLARE_UVERBS_WRITE(IB_USER_VERBS_CMD_CREATE_CQ,
3749 ib_uverbs_create_cq,
3750 UAPI_DEF_WRITE_UDATA_IO(
3751 struct ib_uverbs_create_cq,
3752 struct ib_uverbs_create_cq_resp),
3753 UAPI_DEF_METHOD_NEEDS_FN(create_cq)),
3754 DECLARE_UVERBS_WRITE(
3755 IB_USER_VERBS_CMD_DESTROY_CQ,
3756 ib_uverbs_destroy_cq,
3757 UAPI_DEF_WRITE_IO(struct ib_uverbs_destroy_cq,
3758 struct ib_uverbs_destroy_cq_resp),
3759 UAPI_DEF_METHOD_NEEDS_FN(destroy_cq)),
3760 DECLARE_UVERBS_WRITE(
3761 IB_USER_VERBS_CMD_POLL_CQ,
3762 ib_uverbs_poll_cq,
3763 UAPI_DEF_WRITE_IO(struct ib_uverbs_poll_cq,
3764 struct ib_uverbs_poll_cq_resp),
3765 UAPI_DEF_METHOD_NEEDS_FN(poll_cq)),
3766 DECLARE_UVERBS_WRITE(
3767 IB_USER_VERBS_CMD_REQ_NOTIFY_CQ,
3768 ib_uverbs_req_notify_cq,
3769 UAPI_DEF_WRITE_I(struct ib_uverbs_req_notify_cq),
3770 UAPI_DEF_METHOD_NEEDS_FN(req_notify_cq)),
3771 DECLARE_UVERBS_WRITE(IB_USER_VERBS_CMD_RESIZE_CQ,
3772 ib_uverbs_resize_cq,
3773 UAPI_DEF_WRITE_UDATA_IO(
3774 struct ib_uverbs_resize_cq,
3775 struct ib_uverbs_resize_cq_resp),
3776 UAPI_DEF_METHOD_NEEDS_FN(resize_cq)),
3777 DECLARE_UVERBS_WRITE_EX(
3778 IB_USER_VERBS_EX_CMD_CREATE_CQ,
3779 ib_uverbs_ex_create_cq,
3780 UAPI_DEF_WRITE_IO_EX(struct ib_uverbs_ex_create_cq,
3781 reserved,
3782 struct ib_uverbs_ex_create_cq_resp,
3783 response_length),
3784 UAPI_DEF_METHOD_NEEDS_FN(create_cq)),
3785 DECLARE_UVERBS_WRITE_EX(
3786 IB_USER_VERBS_EX_CMD_MODIFY_CQ,
3787 ib_uverbs_ex_modify_cq,
3788 UAPI_DEF_WRITE_I(struct ib_uverbs_ex_modify_cq),
3789 UAPI_DEF_METHOD_NEEDS_FN(modify_cq))),
3790
3791 DECLARE_UVERBS_OBJECT(
3792 UVERBS_OBJECT_DEVICE,
3793 DECLARE_UVERBS_WRITE(IB_USER_VERBS_CMD_GET_CONTEXT,
3794 ib_uverbs_get_context,
3795 UAPI_DEF_WRITE_UDATA_IO(
3796 struct ib_uverbs_get_context,
3797 struct ib_uverbs_get_context_resp)),
3798 DECLARE_UVERBS_WRITE(
3799 IB_USER_VERBS_CMD_QUERY_DEVICE,
3800 ib_uverbs_query_device,
3801 UAPI_DEF_WRITE_IO(struct ib_uverbs_query_device,
3802 struct ib_uverbs_query_device_resp)),
3803 DECLARE_UVERBS_WRITE(
3804 IB_USER_VERBS_CMD_QUERY_PORT,
3805 ib_uverbs_query_port,
3806 UAPI_DEF_WRITE_IO(struct ib_uverbs_query_port,
3807 struct ib_uverbs_query_port_resp),
3808 UAPI_DEF_METHOD_NEEDS_FN(query_port)),
3809 DECLARE_UVERBS_WRITE_EX(
3810 IB_USER_VERBS_EX_CMD_QUERY_DEVICE,
3811 ib_uverbs_ex_query_device,
3812 UAPI_DEF_WRITE_IO_EX(
3813 struct ib_uverbs_ex_query_device,
3814 reserved,
3815 struct ib_uverbs_ex_query_device_resp,
3816 response_length),
3817 UAPI_DEF_METHOD_NEEDS_FN(query_device)),
3818 UAPI_DEF_OBJ_NEEDS_FN(alloc_ucontext),
3819 UAPI_DEF_OBJ_NEEDS_FN(dealloc_ucontext)),
3820
3821 DECLARE_UVERBS_OBJECT(
3822 UVERBS_OBJECT_FLOW,
3823 DECLARE_UVERBS_WRITE_EX(
3824 IB_USER_VERBS_EX_CMD_CREATE_FLOW,
3825 ib_uverbs_ex_create_flow,
3826 UAPI_DEF_WRITE_IO_EX(struct ib_uverbs_create_flow,
3827 flow_attr,
3828 struct ib_uverbs_create_flow_resp,
3829 flow_handle),
3830 UAPI_DEF_METHOD_NEEDS_FN(create_flow)),
3831 DECLARE_UVERBS_WRITE_EX(
3832 IB_USER_VERBS_EX_CMD_DESTROY_FLOW,
3833 ib_uverbs_ex_destroy_flow,
3834 UAPI_DEF_WRITE_I(struct ib_uverbs_destroy_flow),
3835 UAPI_DEF_METHOD_NEEDS_FN(destroy_flow))),
3836
3837 DECLARE_UVERBS_OBJECT(
3838 UVERBS_OBJECT_MR,
3839 DECLARE_UVERBS_WRITE(IB_USER_VERBS_CMD_DEREG_MR,
3840 ib_uverbs_dereg_mr,
3841 UAPI_DEF_WRITE_I(struct ib_uverbs_dereg_mr),
3842 UAPI_DEF_METHOD_NEEDS_FN(dereg_mr)),
3843 DECLARE_UVERBS_WRITE(
3844 IB_USER_VERBS_CMD_REG_MR,
3845 ib_uverbs_reg_mr,
3846 UAPI_DEF_WRITE_UDATA_IO(struct ib_uverbs_reg_mr,
3847 struct ib_uverbs_reg_mr_resp),
3848 UAPI_DEF_METHOD_NEEDS_FN(reg_user_mr)),
3849 DECLARE_UVERBS_WRITE(
3850 IB_USER_VERBS_CMD_REREG_MR,
3851 ib_uverbs_rereg_mr,
3852 UAPI_DEF_WRITE_UDATA_IO(struct ib_uverbs_rereg_mr,
3853 struct ib_uverbs_rereg_mr_resp),
3854 UAPI_DEF_METHOD_NEEDS_FN(rereg_user_mr))),
3855
3856 DECLARE_UVERBS_OBJECT(
3857 UVERBS_OBJECT_MW,
3858 DECLARE_UVERBS_WRITE(
3859 IB_USER_VERBS_CMD_ALLOC_MW,
3860 ib_uverbs_alloc_mw,
3861 UAPI_DEF_WRITE_UDATA_IO(struct ib_uverbs_alloc_mw,
3862 struct ib_uverbs_alloc_mw_resp),
3863 UAPI_DEF_METHOD_NEEDS_FN(alloc_mw)),
3864 DECLARE_UVERBS_WRITE(
3865 IB_USER_VERBS_CMD_DEALLOC_MW,
3866 ib_uverbs_dealloc_mw,
3867 UAPI_DEF_WRITE_I(struct ib_uverbs_dealloc_mw),
3868 UAPI_DEF_METHOD_NEEDS_FN(dealloc_mw))),
3869
3870 DECLARE_UVERBS_OBJECT(
3871 UVERBS_OBJECT_PD,
3872 DECLARE_UVERBS_WRITE(
3873 IB_USER_VERBS_CMD_ALLOC_PD,
3874 ib_uverbs_alloc_pd,
3875 UAPI_DEF_WRITE_UDATA_IO(struct ib_uverbs_alloc_pd,
3876 struct ib_uverbs_alloc_pd_resp),
3877 UAPI_DEF_METHOD_NEEDS_FN(alloc_pd)),
3878 DECLARE_UVERBS_WRITE(
3879 IB_USER_VERBS_CMD_DEALLOC_PD,
3880 ib_uverbs_dealloc_pd,
3881 UAPI_DEF_WRITE_I(struct ib_uverbs_dealloc_pd),
3882 UAPI_DEF_METHOD_NEEDS_FN(dealloc_pd))),
3883
3884 DECLARE_UVERBS_OBJECT(
3885 UVERBS_OBJECT_QP,
3886 DECLARE_UVERBS_WRITE(
3887 IB_USER_VERBS_CMD_ATTACH_MCAST,
3888 ib_uverbs_attach_mcast,
3889 UAPI_DEF_WRITE_I(struct ib_uverbs_attach_mcast),
3890 UAPI_DEF_METHOD_NEEDS_FN(attach_mcast),
3891 UAPI_DEF_METHOD_NEEDS_FN(detach_mcast)),
3892 DECLARE_UVERBS_WRITE(IB_USER_VERBS_CMD_CREATE_QP,
3893 ib_uverbs_create_qp,
3894 UAPI_DEF_WRITE_UDATA_IO(
3895 struct ib_uverbs_create_qp,
3896 struct ib_uverbs_create_qp_resp),
3897 UAPI_DEF_METHOD_NEEDS_FN(create_qp)),
3898 DECLARE_UVERBS_WRITE(
3899 IB_USER_VERBS_CMD_DESTROY_QP,
3900 ib_uverbs_destroy_qp,
3901 UAPI_DEF_WRITE_IO(struct ib_uverbs_destroy_qp,
3902 struct ib_uverbs_destroy_qp_resp),
3903 UAPI_DEF_METHOD_NEEDS_FN(destroy_qp)),
3904 DECLARE_UVERBS_WRITE(
3905 IB_USER_VERBS_CMD_DETACH_MCAST,
3906 ib_uverbs_detach_mcast,
3907 UAPI_DEF_WRITE_I(struct ib_uverbs_detach_mcast),
3908 UAPI_DEF_METHOD_NEEDS_FN(detach_mcast)),
3909 DECLARE_UVERBS_WRITE(
3910 IB_USER_VERBS_CMD_MODIFY_QP,
3911 ib_uverbs_modify_qp,
3912 UAPI_DEF_WRITE_I(struct ib_uverbs_modify_qp),
3913 UAPI_DEF_METHOD_NEEDS_FN(modify_qp)),
3914 DECLARE_UVERBS_WRITE(
3915 IB_USER_VERBS_CMD_POST_RECV,
3916 ib_uverbs_post_recv,
3917 UAPI_DEF_WRITE_IO(struct ib_uverbs_post_recv,
3918 struct ib_uverbs_post_recv_resp),
3919 UAPI_DEF_METHOD_NEEDS_FN(post_recv)),
3920 DECLARE_UVERBS_WRITE(
3921 IB_USER_VERBS_CMD_POST_SEND,
3922 ib_uverbs_post_send,
3923 UAPI_DEF_WRITE_IO(struct ib_uverbs_post_send,
3924 struct ib_uverbs_post_send_resp),
3925 UAPI_DEF_METHOD_NEEDS_FN(post_send)),
3926 DECLARE_UVERBS_WRITE(
3927 IB_USER_VERBS_CMD_QUERY_QP,
3928 ib_uverbs_query_qp,
3929 UAPI_DEF_WRITE_IO(struct ib_uverbs_query_qp,
3930 struct ib_uverbs_query_qp_resp),
3931 UAPI_DEF_METHOD_NEEDS_FN(query_qp)),
3932 DECLARE_UVERBS_WRITE_EX(
3933 IB_USER_VERBS_EX_CMD_CREATE_QP,
3934 ib_uverbs_ex_create_qp,
3935 UAPI_DEF_WRITE_IO_EX(struct ib_uverbs_ex_create_qp,
3936 comp_mask,
3937 struct ib_uverbs_ex_create_qp_resp,
3938 response_length),
3939 UAPI_DEF_METHOD_NEEDS_FN(create_qp)),
3940 DECLARE_UVERBS_WRITE_EX(
3941 IB_USER_VERBS_EX_CMD_MODIFY_QP,
3942 ib_uverbs_ex_modify_qp,
3943 UAPI_DEF_WRITE_IO_EX(struct ib_uverbs_ex_modify_qp,
3944 base,
3945 struct ib_uverbs_ex_modify_qp_resp,
3946 response_length),
3947 UAPI_DEF_METHOD_NEEDS_FN(modify_qp))),
3948
3949 DECLARE_UVERBS_OBJECT(
3950 UVERBS_OBJECT_RWQ_IND_TBL,
3951 DECLARE_UVERBS_WRITE_EX(
3952 IB_USER_VERBS_EX_CMD_CREATE_RWQ_IND_TBL,
3953 ib_uverbs_ex_create_rwq_ind_table,
3954 UAPI_DEF_WRITE_IO_EX(
3955 struct ib_uverbs_ex_create_rwq_ind_table,
3956 log_ind_tbl_size,
3957 struct ib_uverbs_ex_create_rwq_ind_table_resp,
3958 ind_tbl_num),
3959 UAPI_DEF_METHOD_NEEDS_FN(create_rwq_ind_table)),
3960 DECLARE_UVERBS_WRITE_EX(
3961 IB_USER_VERBS_EX_CMD_DESTROY_RWQ_IND_TBL,
3962 ib_uverbs_ex_destroy_rwq_ind_table,
3963 UAPI_DEF_WRITE_I(
3964 struct ib_uverbs_ex_destroy_rwq_ind_table),
3965 UAPI_DEF_METHOD_NEEDS_FN(destroy_rwq_ind_table))),
3966
3967 DECLARE_UVERBS_OBJECT(
3968 UVERBS_OBJECT_WQ,
3969 DECLARE_UVERBS_WRITE_EX(
3970 IB_USER_VERBS_EX_CMD_CREATE_WQ,
3971 ib_uverbs_ex_create_wq,
3972 UAPI_DEF_WRITE_IO_EX(struct ib_uverbs_ex_create_wq,
3973 max_sge,
3974 struct ib_uverbs_ex_create_wq_resp,
3975 wqn),
3976 UAPI_DEF_METHOD_NEEDS_FN(create_wq)),
3977 DECLARE_UVERBS_WRITE_EX(
3978 IB_USER_VERBS_EX_CMD_DESTROY_WQ,
3979 ib_uverbs_ex_destroy_wq,
3980 UAPI_DEF_WRITE_IO_EX(struct ib_uverbs_ex_destroy_wq,
3981 wq_handle,
3982 struct ib_uverbs_ex_destroy_wq_resp,
3983 reserved),
3984 UAPI_DEF_METHOD_NEEDS_FN(destroy_wq)),
3985 DECLARE_UVERBS_WRITE_EX(
3986 IB_USER_VERBS_EX_CMD_MODIFY_WQ,
3987 ib_uverbs_ex_modify_wq,
3988 UAPI_DEF_WRITE_I_EX(struct ib_uverbs_ex_modify_wq,
3989 curr_wq_state),
3990 UAPI_DEF_METHOD_NEEDS_FN(modify_wq))),
3991
3992 DECLARE_UVERBS_OBJECT(
3993 UVERBS_OBJECT_SRQ,
3994 DECLARE_UVERBS_WRITE(IB_USER_VERBS_CMD_CREATE_SRQ,
3995 ib_uverbs_create_srq,
3996 UAPI_DEF_WRITE_UDATA_IO(
3997 struct ib_uverbs_create_srq,
3998 struct ib_uverbs_create_srq_resp),
3999 UAPI_DEF_METHOD_NEEDS_FN(create_srq)),
4000 DECLARE_UVERBS_WRITE(IB_USER_VERBS_CMD_CREATE_XSRQ,
4001 ib_uverbs_create_xsrq,
4002 UAPI_DEF_WRITE_UDATA_IO(
4003 struct ib_uverbs_create_xsrq,
4004 struct ib_uverbs_create_srq_resp),
4005 UAPI_DEF_METHOD_NEEDS_FN(create_srq)),
4006 DECLARE_UVERBS_WRITE(
4007 IB_USER_VERBS_CMD_DESTROY_SRQ,
4008 ib_uverbs_destroy_srq,
4009 UAPI_DEF_WRITE_IO(struct ib_uverbs_destroy_srq,
4010 struct ib_uverbs_destroy_srq_resp),
4011 UAPI_DEF_METHOD_NEEDS_FN(destroy_srq)),
4012 DECLARE_UVERBS_WRITE(
4013 IB_USER_VERBS_CMD_MODIFY_SRQ,
4014 ib_uverbs_modify_srq,
4015 UAPI_DEF_WRITE_UDATA_I(struct ib_uverbs_modify_srq),
4016 UAPI_DEF_METHOD_NEEDS_FN(modify_srq)),
4017 DECLARE_UVERBS_WRITE(
4018 IB_USER_VERBS_CMD_POST_SRQ_RECV,
4019 ib_uverbs_post_srq_recv,
4020 UAPI_DEF_WRITE_IO(struct ib_uverbs_post_srq_recv,
4021 struct ib_uverbs_post_srq_recv_resp),
4022 UAPI_DEF_METHOD_NEEDS_FN(post_srq_recv)),
4023 DECLARE_UVERBS_WRITE(
4024 IB_USER_VERBS_CMD_QUERY_SRQ,
4025 ib_uverbs_query_srq,
4026 UAPI_DEF_WRITE_IO(struct ib_uverbs_query_srq,
4027 struct ib_uverbs_query_srq_resp),
4028 UAPI_DEF_METHOD_NEEDS_FN(query_srq))),
4029
4030 DECLARE_UVERBS_OBJECT(
4031 UVERBS_OBJECT_XRCD,
4032 DECLARE_UVERBS_WRITE(
4033 IB_USER_VERBS_CMD_CLOSE_XRCD,
4034 ib_uverbs_close_xrcd,
4035 UAPI_DEF_WRITE_I(struct ib_uverbs_close_xrcd)),
4036 DECLARE_UVERBS_WRITE(IB_USER_VERBS_CMD_OPEN_QP,
4037 ib_uverbs_open_qp,
4038 UAPI_DEF_WRITE_UDATA_IO(
4039 struct ib_uverbs_open_qp,
4040 struct ib_uverbs_create_qp_resp)),
4041 DECLARE_UVERBS_WRITE(IB_USER_VERBS_CMD_OPEN_XRCD,
4042 ib_uverbs_open_xrcd,
4043 UAPI_DEF_WRITE_UDATA_IO(
4044 struct ib_uverbs_open_xrcd,
4045 struct ib_uverbs_open_xrcd_resp)),
4046 UAPI_DEF_OBJ_NEEDS_FN(alloc_xrcd),
4047 UAPI_DEF_OBJ_NEEDS_FN(dealloc_xrcd)),
4048
4049 {},
4050 };
Linux with added FPC-III support