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 = min_t(u32, ib_dev->phys_port_cnt, U8_MAX);
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 && cmd->qp_type != IB_QPT_XRC_INI)
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),
2011 		       GFP_KERNEL);
2012 }
2013 
2014 static int ib_uverbs_post_send(struct uverbs_attr_bundle *attrs)
2015 {
2016 	struct ib_uverbs_post_send      cmd;
2017 	struct ib_uverbs_post_send_resp resp;
2018 	struct ib_uverbs_send_wr       *user_wr;
2019 	struct ib_send_wr              *wr = NULL, *last, *next;
2020 	const struct ib_send_wr	       *bad_wr;
2021 	struct ib_qp                   *qp;
2022 	int                             i, sg_ind;
2023 	int				is_ud;
2024 	int ret, ret2;
2025 	size_t                          next_size;
2026 	const struct ib_sge __user *sgls;
2027 	const void __user *wqes;
2028 	struct uverbs_req_iter iter;
2029 
2030 	ret = uverbs_request_start(attrs, &iter, &cmd, sizeof(cmd));
2031 	if (ret)
2032 		return ret;
2033 	wqes = uverbs_request_next_ptr(&iter, cmd.wqe_size * cmd.wr_count);
2034 	if (IS_ERR(wqes))
2035 		return PTR_ERR(wqes);
2036 	sgls = uverbs_request_next_ptr(
2037 		&iter, cmd.sge_count * sizeof(struct ib_uverbs_sge));
2038 	if (IS_ERR(sgls))
2039 		return PTR_ERR(sgls);
2040 	ret = uverbs_request_finish(&iter);
2041 	if (ret)
2042 		return ret;
2043 
2044 	user_wr = kmalloc(cmd.wqe_size, GFP_KERNEL);
2045 	if (!user_wr)
2046 		return -ENOMEM;
2047 
2048 	qp = uobj_get_obj_read(qp, UVERBS_OBJECT_QP, cmd.qp_handle, attrs);
2049 	if (!qp) {
2050 		ret = -EINVAL;
2051 		goto out;
2052 	}
2053 
2054 	is_ud = qp->qp_type == IB_QPT_UD;
2055 	sg_ind = 0;
2056 	last = NULL;
2057 	for (i = 0; i < cmd.wr_count; ++i) {
2058 		if (copy_from_user(user_wr, wqes + i * cmd.wqe_size,
2059 				   cmd.wqe_size)) {
2060 			ret = -EFAULT;
2061 			goto out_put;
2062 		}
2063 
2064 		if (user_wr->num_sge + sg_ind > cmd.sge_count) {
2065 			ret = -EINVAL;
2066 			goto out_put;
2067 		}
2068 
2069 		if (is_ud) {
2070 			struct ib_ud_wr *ud;
2071 
2072 			if (user_wr->opcode != IB_WR_SEND &&
2073 			    user_wr->opcode != IB_WR_SEND_WITH_IMM) {
2074 				ret = -EINVAL;
2075 				goto out_put;
2076 			}
2077 
2078 			next_size = sizeof(*ud);
2079 			ud = alloc_wr(next_size, user_wr->num_sge);
2080 			if (!ud) {
2081 				ret = -ENOMEM;
2082 				goto out_put;
2083 			}
2084 
2085 			ud->ah = uobj_get_obj_read(ah, UVERBS_OBJECT_AH,
2086 						   user_wr->wr.ud.ah, attrs);
2087 			if (!ud->ah) {
2088 				kfree(ud);
2089 				ret = -EINVAL;
2090 				goto out_put;
2091 			}
2092 			ud->remote_qpn = user_wr->wr.ud.remote_qpn;
2093 			ud->remote_qkey = user_wr->wr.ud.remote_qkey;
2094 
2095 			next = &ud->wr;
2096 		} else if (user_wr->opcode == IB_WR_RDMA_WRITE_WITH_IMM ||
2097 			   user_wr->opcode == IB_WR_RDMA_WRITE ||
2098 			   user_wr->opcode == IB_WR_RDMA_READ) {
2099 			struct ib_rdma_wr *rdma;
2100 
2101 			next_size = sizeof(*rdma);
2102 			rdma = alloc_wr(next_size, user_wr->num_sge);
2103 			if (!rdma) {
2104 				ret = -ENOMEM;
2105 				goto out_put;
2106 			}
2107 
2108 			rdma->remote_addr = user_wr->wr.rdma.remote_addr;
2109 			rdma->rkey = user_wr->wr.rdma.rkey;
2110 
2111 			next = &rdma->wr;
2112 		} else if (user_wr->opcode == IB_WR_ATOMIC_CMP_AND_SWP ||
2113 			   user_wr->opcode == IB_WR_ATOMIC_FETCH_AND_ADD) {
2114 			struct ib_atomic_wr *atomic;
2115 
2116 			next_size = sizeof(*atomic);
2117 			atomic = alloc_wr(next_size, user_wr->num_sge);
2118 			if (!atomic) {
2119 				ret = -ENOMEM;
2120 				goto out_put;
2121 			}
2122 
2123 			atomic->remote_addr = user_wr->wr.atomic.remote_addr;
2124 			atomic->compare_add = user_wr->wr.atomic.compare_add;
2125 			atomic->swap = user_wr->wr.atomic.swap;
2126 			atomic->rkey = user_wr->wr.atomic.rkey;
2127 
2128 			next = &atomic->wr;
2129 		} else if (user_wr->opcode == IB_WR_SEND ||
2130 			   user_wr->opcode == IB_WR_SEND_WITH_IMM ||
2131 			   user_wr->opcode == IB_WR_SEND_WITH_INV) {
2132 			next_size = sizeof(*next);
2133 			next = alloc_wr(next_size, user_wr->num_sge);
2134 			if (!next) {
2135 				ret = -ENOMEM;
2136 				goto out_put;
2137 			}
2138 		} else {
2139 			ret = -EINVAL;
2140 			goto out_put;
2141 		}
2142 
2143 		if (user_wr->opcode == IB_WR_SEND_WITH_IMM ||
2144 		    user_wr->opcode == IB_WR_RDMA_WRITE_WITH_IMM) {
2145 			next->ex.imm_data =
2146 					(__be32 __force) user_wr->ex.imm_data;
2147 		} else if (user_wr->opcode == IB_WR_SEND_WITH_INV) {
2148 			next->ex.invalidate_rkey = user_wr->ex.invalidate_rkey;
2149 		}
2150 
2151 		if (!last)
2152 			wr = next;
2153 		else
2154 			last->next = next;
2155 		last = next;
2156 
2157 		next->next       = NULL;
2158 		next->wr_id      = user_wr->wr_id;
2159 		next->num_sge    = user_wr->num_sge;
2160 		next->opcode     = user_wr->opcode;
2161 		next->send_flags = user_wr->send_flags;
2162 
2163 		if (next->num_sge) {
2164 			next->sg_list = (void *) next +
2165 				ALIGN(next_size, sizeof(struct ib_sge));
2166 			if (copy_from_user(next->sg_list, sgls + sg_ind,
2167 					   next->num_sge *
2168 						   sizeof(struct ib_sge))) {
2169 				ret = -EFAULT;
2170 				goto out_put;
2171 			}
2172 			sg_ind += next->num_sge;
2173 		} else
2174 			next->sg_list = NULL;
2175 	}
2176 
2177 	resp.bad_wr = 0;
2178 	ret = qp->device->ops.post_send(qp->real_qp, wr, &bad_wr);
2179 	if (ret)
2180 		for (next = wr; next; next = next->next) {
2181 			++resp.bad_wr;
2182 			if (next == bad_wr)
2183 				break;
2184 		}
2185 
2186 	ret2 = uverbs_response(attrs, &resp, sizeof(resp));
2187 	if (ret2)
2188 		ret = ret2;
2189 
2190 out_put:
2191 	rdma_lookup_put_uobject(&qp->uobject->uevent.uobject,
2192 				UVERBS_LOOKUP_READ);
2193 
2194 	while (wr) {
2195 		if (is_ud && ud_wr(wr)->ah)
2196 			uobj_put_obj_read(ud_wr(wr)->ah);
2197 		next = wr->next;
2198 		kfree(wr);
2199 		wr = next;
2200 	}
2201 
2202 out:
2203 	kfree(user_wr);
2204 
2205 	return ret;
2206 }
2207 
2208 static struct ib_recv_wr *
2209 ib_uverbs_unmarshall_recv(struct uverbs_req_iter *iter, u32 wr_count,
2210 			  u32 wqe_size, u32 sge_count)
2211 {
2212 	struct ib_uverbs_recv_wr *user_wr;
2213 	struct ib_recv_wr        *wr = NULL, *last, *next;
2214 	int                       sg_ind;
2215 	int                       i;
2216 	int                       ret;
2217 	const struct ib_sge __user *sgls;
2218 	const void __user *wqes;
2219 
2220 	if (wqe_size < sizeof(struct ib_uverbs_recv_wr))
2221 		return ERR_PTR(-EINVAL);
2222 
2223 	wqes = uverbs_request_next_ptr(iter, wqe_size * wr_count);
2224 	if (IS_ERR(wqes))
2225 		return ERR_CAST(wqes);
2226 	sgls = uverbs_request_next_ptr(
2227 		iter, sge_count * sizeof(struct ib_uverbs_sge));
2228 	if (IS_ERR(sgls))
2229 		return ERR_CAST(sgls);
2230 	ret = uverbs_request_finish(iter);
2231 	if (ret)
2232 		return ERR_PTR(ret);
2233 
2234 	user_wr = kmalloc(wqe_size, GFP_KERNEL);
2235 	if (!user_wr)
2236 		return ERR_PTR(-ENOMEM);
2237 
2238 	sg_ind = 0;
2239 	last = NULL;
2240 	for (i = 0; i < wr_count; ++i) {
2241 		if (copy_from_user(user_wr, wqes + i * wqe_size,
2242 				   wqe_size)) {
2243 			ret = -EFAULT;
2244 			goto err;
2245 		}
2246 
2247 		if (user_wr->num_sge + sg_ind > sge_count) {
2248 			ret = -EINVAL;
2249 			goto err;
2250 		}
2251 
2252 		if (user_wr->num_sge >=
2253 		    (U32_MAX - ALIGN(sizeof(*next), sizeof(struct ib_sge))) /
2254 			    sizeof(struct ib_sge)) {
2255 			ret = -EINVAL;
2256 			goto err;
2257 		}
2258 
2259 		next = kmalloc(ALIGN(sizeof(*next), sizeof(struct ib_sge)) +
2260 				       user_wr->num_sge * sizeof(struct ib_sge),
2261 			       GFP_KERNEL);
2262 		if (!next) {
2263 			ret = -ENOMEM;
2264 			goto err;
2265 		}
2266 
2267 		if (!last)
2268 			wr = next;
2269 		else
2270 			last->next = next;
2271 		last = next;
2272 
2273 		next->next       = NULL;
2274 		next->wr_id      = user_wr->wr_id;
2275 		next->num_sge    = user_wr->num_sge;
2276 
2277 		if (next->num_sge) {
2278 			next->sg_list = (void *)next +
2279 				ALIGN(sizeof(*next), sizeof(struct ib_sge));
2280 			if (copy_from_user(next->sg_list, sgls + sg_ind,
2281 					   next->num_sge *
2282 						   sizeof(struct ib_sge))) {
2283 				ret = -EFAULT;
2284 				goto err;
2285 			}
2286 			sg_ind += next->num_sge;
2287 		} else
2288 			next->sg_list = NULL;
2289 	}
2290 
2291 	kfree(user_wr);
2292 	return wr;
2293 
2294 err:
2295 	kfree(user_wr);
2296 
2297 	while (wr) {
2298 		next = wr->next;
2299 		kfree(wr);
2300 		wr = next;
2301 	}
2302 
2303 	return ERR_PTR(ret);
2304 }
2305 
2306 static int ib_uverbs_post_recv(struct uverbs_attr_bundle *attrs)
2307 {
2308 	struct ib_uverbs_post_recv      cmd;
2309 	struct ib_uverbs_post_recv_resp resp;
2310 	struct ib_recv_wr              *wr, *next;
2311 	const struct ib_recv_wr	       *bad_wr;
2312 	struct ib_qp                   *qp;
2313 	int ret, ret2;
2314 	struct uverbs_req_iter iter;
2315 
2316 	ret = uverbs_request_start(attrs, &iter, &cmd, sizeof(cmd));
2317 	if (ret)
2318 		return ret;
2319 
2320 	wr = ib_uverbs_unmarshall_recv(&iter, cmd.wr_count, cmd.wqe_size,
2321 				       cmd.sge_count);
2322 	if (IS_ERR(wr))
2323 		return PTR_ERR(wr);
2324 
2325 	qp = uobj_get_obj_read(qp, UVERBS_OBJECT_QP, cmd.qp_handle, attrs);
2326 	if (!qp) {
2327 		ret = -EINVAL;
2328 		goto out;
2329 	}
2330 
2331 	resp.bad_wr = 0;
2332 	ret = qp->device->ops.post_recv(qp->real_qp, wr, &bad_wr);
2333 
2334 	rdma_lookup_put_uobject(&qp->uobject->uevent.uobject,
2335 				UVERBS_LOOKUP_READ);
2336 	if (ret) {
2337 		for (next = wr; next; next = next->next) {
2338 			++resp.bad_wr;
2339 			if (next == bad_wr)
2340 				break;
2341 		}
2342 	}
2343 
2344 	ret2 = uverbs_response(attrs, &resp, sizeof(resp));
2345 	if (ret2)
2346 		ret = ret2;
2347 out:
2348 	while (wr) {
2349 		next = wr->next;
2350 		kfree(wr);
2351 		wr = next;
2352 	}
2353 
2354 	return ret;
2355 }
2356 
2357 static int ib_uverbs_post_srq_recv(struct uverbs_attr_bundle *attrs)
2358 {
2359 	struct ib_uverbs_post_srq_recv      cmd;
2360 	struct ib_uverbs_post_srq_recv_resp resp;
2361 	struct ib_recv_wr                  *wr, *next;
2362 	const struct ib_recv_wr		   *bad_wr;
2363 	struct ib_srq                      *srq;
2364 	int ret, ret2;
2365 	struct uverbs_req_iter iter;
2366 
2367 	ret = uverbs_request_start(attrs, &iter, &cmd, sizeof(cmd));
2368 	if (ret)
2369 		return ret;
2370 
2371 	wr = ib_uverbs_unmarshall_recv(&iter, cmd.wr_count, cmd.wqe_size,
2372 				       cmd.sge_count);
2373 	if (IS_ERR(wr))
2374 		return PTR_ERR(wr);
2375 
2376 	srq = uobj_get_obj_read(srq, UVERBS_OBJECT_SRQ, cmd.srq_handle, attrs);
2377 	if (!srq) {
2378 		ret = -EINVAL;
2379 		goto out;
2380 	}
2381 
2382 	resp.bad_wr = 0;
2383 	ret = srq->device->ops.post_srq_recv(srq, wr, &bad_wr);
2384 
2385 	rdma_lookup_put_uobject(&srq->uobject->uevent.uobject,
2386 				UVERBS_LOOKUP_READ);
2387 
2388 	if (ret)
2389 		for (next = wr; next; next = next->next) {
2390 			++resp.bad_wr;
2391 			if (next == bad_wr)
2392 				break;
2393 		}
2394 
2395 	ret2 = uverbs_response(attrs, &resp, sizeof(resp));
2396 	if (ret2)
2397 		ret = ret2;
2398 
2399 out:
2400 	while (wr) {
2401 		next = wr->next;
2402 		kfree(wr);
2403 		wr = next;
2404 	}
2405 
2406 	return ret;
2407 }
2408 
2409 static int ib_uverbs_create_ah(struct uverbs_attr_bundle *attrs)
2410 {
2411 	struct ib_uverbs_create_ah	 cmd;
2412 	struct ib_uverbs_create_ah_resp	 resp;
2413 	struct ib_uobject		*uobj;
2414 	struct ib_pd			*pd;
2415 	struct ib_ah			*ah;
2416 	struct rdma_ah_attr		attr = {};
2417 	int ret;
2418 	struct ib_device *ib_dev;
2419 
2420 	ret = uverbs_request(attrs, &cmd, sizeof(cmd));
2421 	if (ret)
2422 		return ret;
2423 
2424 	uobj = uobj_alloc(UVERBS_OBJECT_AH, attrs, &ib_dev);
2425 	if (IS_ERR(uobj))
2426 		return PTR_ERR(uobj);
2427 
2428 	if (!rdma_is_port_valid(ib_dev, cmd.attr.port_num)) {
2429 		ret = -EINVAL;
2430 		goto err;
2431 	}
2432 
2433 	pd = uobj_get_obj_read(pd, UVERBS_OBJECT_PD, cmd.pd_handle, attrs);
2434 	if (!pd) {
2435 		ret = -EINVAL;
2436 		goto err;
2437 	}
2438 
2439 	attr.type = rdma_ah_find_type(ib_dev, cmd.attr.port_num);
2440 	rdma_ah_set_make_grd(&attr, false);
2441 	rdma_ah_set_dlid(&attr, cmd.attr.dlid);
2442 	rdma_ah_set_sl(&attr, cmd.attr.sl);
2443 	rdma_ah_set_path_bits(&attr, cmd.attr.src_path_bits);
2444 	rdma_ah_set_static_rate(&attr, cmd.attr.static_rate);
2445 	rdma_ah_set_port_num(&attr, cmd.attr.port_num);
2446 
2447 	if (cmd.attr.is_global) {
2448 		rdma_ah_set_grh(&attr, NULL, cmd.attr.grh.flow_label,
2449 				cmd.attr.grh.sgid_index,
2450 				cmd.attr.grh.hop_limit,
2451 				cmd.attr.grh.traffic_class);
2452 		rdma_ah_set_dgid_raw(&attr, cmd.attr.grh.dgid);
2453 	} else {
2454 		rdma_ah_set_ah_flags(&attr, 0);
2455 	}
2456 
2457 	ah = rdma_create_user_ah(pd, &attr, &attrs->driver_udata);
2458 	if (IS_ERR(ah)) {
2459 		ret = PTR_ERR(ah);
2460 		goto err_put;
2461 	}
2462 
2463 	ah->uobject  = uobj;
2464 	uobj->user_handle = cmd.user_handle;
2465 	uobj->object = ah;
2466 	uobj_put_obj_read(pd);
2467 	uobj_finalize_uobj_create(uobj, attrs);
2468 
2469 	resp.ah_handle = uobj->id;
2470 	return uverbs_response(attrs, &resp, sizeof(resp));
2471 
2472 err_put:
2473 	uobj_put_obj_read(pd);
2474 err:
2475 	uobj_alloc_abort(uobj, attrs);
2476 	return ret;
2477 }
2478 
2479 static int ib_uverbs_destroy_ah(struct uverbs_attr_bundle *attrs)
2480 {
2481 	struct ib_uverbs_destroy_ah cmd;
2482 	int ret;
2483 
2484 	ret = uverbs_request(attrs, &cmd, sizeof(cmd));
2485 	if (ret)
2486 		return ret;
2487 
2488 	return uobj_perform_destroy(UVERBS_OBJECT_AH, cmd.ah_handle, attrs);
2489 }
2490 
2491 static int ib_uverbs_attach_mcast(struct uverbs_attr_bundle *attrs)
2492 {
2493 	struct ib_uverbs_attach_mcast cmd;
2494 	struct ib_qp                 *qp;
2495 	struct ib_uqp_object         *obj;
2496 	struct ib_uverbs_mcast_entry *mcast;
2497 	int                           ret;
2498 
2499 	ret = uverbs_request(attrs, &cmd, sizeof(cmd));
2500 	if (ret)
2501 		return ret;
2502 
2503 	qp = uobj_get_obj_read(qp, UVERBS_OBJECT_QP, cmd.qp_handle, attrs);
2504 	if (!qp)
2505 		return -EINVAL;
2506 
2507 	obj = qp->uobject;
2508 
2509 	mutex_lock(&obj->mcast_lock);
2510 	list_for_each_entry(mcast, &obj->mcast_list, list)
2511 		if (cmd.mlid == mcast->lid &&
2512 		    !memcmp(cmd.gid, mcast->gid.raw, sizeof mcast->gid.raw)) {
2513 			ret = 0;
2514 			goto out_put;
2515 		}
2516 
2517 	mcast = kmalloc(sizeof *mcast, GFP_KERNEL);
2518 	if (!mcast) {
2519 		ret = -ENOMEM;
2520 		goto out_put;
2521 	}
2522 
2523 	mcast->lid = cmd.mlid;
2524 	memcpy(mcast->gid.raw, cmd.gid, sizeof mcast->gid.raw);
2525 
2526 	ret = ib_attach_mcast(qp, &mcast->gid, cmd.mlid);
2527 	if (!ret)
2528 		list_add_tail(&mcast->list, &obj->mcast_list);
2529 	else
2530 		kfree(mcast);
2531 
2532 out_put:
2533 	mutex_unlock(&obj->mcast_lock);
2534 	rdma_lookup_put_uobject(&qp->uobject->uevent.uobject,
2535 				UVERBS_LOOKUP_READ);
2536 
2537 	return ret;
2538 }
2539 
2540 static int ib_uverbs_detach_mcast(struct uverbs_attr_bundle *attrs)
2541 {
2542 	struct ib_uverbs_detach_mcast cmd;
2543 	struct ib_uqp_object         *obj;
2544 	struct ib_qp                 *qp;
2545 	struct ib_uverbs_mcast_entry *mcast;
2546 	int                           ret;
2547 	bool                          found = false;
2548 
2549 	ret = uverbs_request(attrs, &cmd, sizeof(cmd));
2550 	if (ret)
2551 		return ret;
2552 
2553 	qp = uobj_get_obj_read(qp, UVERBS_OBJECT_QP, cmd.qp_handle, attrs);
2554 	if (!qp)
2555 		return -EINVAL;
2556 
2557 	obj = qp->uobject;
2558 	mutex_lock(&obj->mcast_lock);
2559 
2560 	list_for_each_entry(mcast, &obj->mcast_list, list)
2561 		if (cmd.mlid == mcast->lid &&
2562 		    !memcmp(cmd.gid, mcast->gid.raw, sizeof mcast->gid.raw)) {
2563 			list_del(&mcast->list);
2564 			kfree(mcast);
2565 			found = true;
2566 			break;
2567 		}
2568 
2569 	if (!found) {
2570 		ret = -EINVAL;
2571 		goto out_put;
2572 	}
2573 
2574 	ret = ib_detach_mcast(qp, (union ib_gid *)cmd.gid, cmd.mlid);
2575 
2576 out_put:
2577 	mutex_unlock(&obj->mcast_lock);
2578 	rdma_lookup_put_uobject(&qp->uobject->uevent.uobject,
2579 				UVERBS_LOOKUP_READ);
2580 	return ret;
2581 }
2582 
2583 struct ib_uflow_resources *flow_resources_alloc(size_t num_specs)
2584 {
2585 	struct ib_uflow_resources *resources;
2586 
2587 	resources = kzalloc(sizeof(*resources), GFP_KERNEL);
2588 
2589 	if (!resources)
2590 		return NULL;
2591 
2592 	if (!num_specs)
2593 		goto out;
2594 
2595 	resources->counters =
2596 		kcalloc(num_specs, sizeof(*resources->counters), GFP_KERNEL);
2597 	resources->collection =
2598 		kcalloc(num_specs, sizeof(*resources->collection), GFP_KERNEL);
2599 
2600 	if (!resources->counters || !resources->collection)
2601 		goto err;
2602 
2603 out:
2604 	resources->max = num_specs;
2605 	return resources;
2606 
2607 err:
2608 	kfree(resources->counters);
2609 	kfree(resources);
2610 
2611 	return NULL;
2612 }
2613 EXPORT_SYMBOL(flow_resources_alloc);
2614 
2615 void ib_uverbs_flow_resources_free(struct ib_uflow_resources *uflow_res)
2616 {
2617 	unsigned int i;
2618 
2619 	if (!uflow_res)
2620 		return;
2621 
2622 	for (i = 0; i < uflow_res->collection_num; i++)
2623 		atomic_dec(&uflow_res->collection[i]->usecnt);
2624 
2625 	for (i = 0; i < uflow_res->counters_num; i++)
2626 		atomic_dec(&uflow_res->counters[i]->usecnt);
2627 
2628 	kfree(uflow_res->collection);
2629 	kfree(uflow_res->counters);
2630 	kfree(uflow_res);
2631 }
2632 EXPORT_SYMBOL(ib_uverbs_flow_resources_free);
2633 
2634 void flow_resources_add(struct ib_uflow_resources *uflow_res,
2635 			enum ib_flow_spec_type type,
2636 			void *ibobj)
2637 {
2638 	WARN_ON(uflow_res->num >= uflow_res->max);
2639 
2640 	switch (type) {
2641 	case IB_FLOW_SPEC_ACTION_HANDLE:
2642 		atomic_inc(&((struct ib_flow_action *)ibobj)->usecnt);
2643 		uflow_res->collection[uflow_res->collection_num++] =
2644 			(struct ib_flow_action *)ibobj;
2645 		break;
2646 	case IB_FLOW_SPEC_ACTION_COUNT:
2647 		atomic_inc(&((struct ib_counters *)ibobj)->usecnt);
2648 		uflow_res->counters[uflow_res->counters_num++] =
2649 			(struct ib_counters *)ibobj;
2650 		break;
2651 	default:
2652 		WARN_ON(1);
2653 	}
2654 
2655 	uflow_res->num++;
2656 }
2657 EXPORT_SYMBOL(flow_resources_add);
2658 
2659 static int kern_spec_to_ib_spec_action(struct uverbs_attr_bundle *attrs,
2660 				       struct ib_uverbs_flow_spec *kern_spec,
2661 				       union ib_flow_spec *ib_spec,
2662 				       struct ib_uflow_resources *uflow_res)
2663 {
2664 	ib_spec->type = kern_spec->type;
2665 	switch (ib_spec->type) {
2666 	case IB_FLOW_SPEC_ACTION_TAG:
2667 		if (kern_spec->flow_tag.size !=
2668 		    sizeof(struct ib_uverbs_flow_spec_action_tag))
2669 			return -EINVAL;
2670 
2671 		ib_spec->flow_tag.size = sizeof(struct ib_flow_spec_action_tag);
2672 		ib_spec->flow_tag.tag_id = kern_spec->flow_tag.tag_id;
2673 		break;
2674 	case IB_FLOW_SPEC_ACTION_DROP:
2675 		if (kern_spec->drop.size !=
2676 		    sizeof(struct ib_uverbs_flow_spec_action_drop))
2677 			return -EINVAL;
2678 
2679 		ib_spec->drop.size = sizeof(struct ib_flow_spec_action_drop);
2680 		break;
2681 	case IB_FLOW_SPEC_ACTION_HANDLE:
2682 		if (kern_spec->action.size !=
2683 		    sizeof(struct ib_uverbs_flow_spec_action_handle))
2684 			return -EOPNOTSUPP;
2685 		ib_spec->action.act = uobj_get_obj_read(flow_action,
2686 							UVERBS_OBJECT_FLOW_ACTION,
2687 							kern_spec->action.handle,
2688 							attrs);
2689 		if (!ib_spec->action.act)
2690 			return -EINVAL;
2691 		ib_spec->action.size =
2692 			sizeof(struct ib_flow_spec_action_handle);
2693 		flow_resources_add(uflow_res,
2694 				   IB_FLOW_SPEC_ACTION_HANDLE,
2695 				   ib_spec->action.act);
2696 		uobj_put_obj_read(ib_spec->action.act);
2697 		break;
2698 	case IB_FLOW_SPEC_ACTION_COUNT:
2699 		if (kern_spec->flow_count.size !=
2700 			sizeof(struct ib_uverbs_flow_spec_action_count))
2701 			return -EINVAL;
2702 		ib_spec->flow_count.counters =
2703 			uobj_get_obj_read(counters,
2704 					  UVERBS_OBJECT_COUNTERS,
2705 					  kern_spec->flow_count.handle,
2706 					  attrs);
2707 		if (!ib_spec->flow_count.counters)
2708 			return -EINVAL;
2709 		ib_spec->flow_count.size =
2710 				sizeof(struct ib_flow_spec_action_count);
2711 		flow_resources_add(uflow_res,
2712 				   IB_FLOW_SPEC_ACTION_COUNT,
2713 				   ib_spec->flow_count.counters);
2714 		uobj_put_obj_read(ib_spec->flow_count.counters);
2715 		break;
2716 	default:
2717 		return -EINVAL;
2718 	}
2719 	return 0;
2720 }
2721 
2722 static ssize_t spec_filter_size(const void *kern_spec_filter, u16 kern_filter_size,
2723 				u16 ib_real_filter_sz)
2724 {
2725 	/*
2726 	 * User space filter structures must be 64 bit aligned, otherwise this
2727 	 * may pass, but we won't handle additional new attributes.
2728 	 */
2729 
2730 	if (kern_filter_size > ib_real_filter_sz) {
2731 		if (memchr_inv(kern_spec_filter +
2732 			       ib_real_filter_sz, 0,
2733 			       kern_filter_size - ib_real_filter_sz))
2734 			return -EINVAL;
2735 		return ib_real_filter_sz;
2736 	}
2737 	return kern_filter_size;
2738 }
2739 
2740 int ib_uverbs_kern_spec_to_ib_spec_filter(enum ib_flow_spec_type type,
2741 					  const void *kern_spec_mask,
2742 					  const void *kern_spec_val,
2743 					  size_t kern_filter_sz,
2744 					  union ib_flow_spec *ib_spec)
2745 {
2746 	ssize_t actual_filter_sz;
2747 	ssize_t ib_filter_sz;
2748 
2749 	/* User flow spec size must be aligned to 4 bytes */
2750 	if (kern_filter_sz != ALIGN(kern_filter_sz, 4))
2751 		return -EINVAL;
2752 
2753 	ib_spec->type = type;
2754 
2755 	if (ib_spec->type == (IB_FLOW_SPEC_INNER | IB_FLOW_SPEC_VXLAN_TUNNEL))
2756 		return -EINVAL;
2757 
2758 	switch (ib_spec->type & ~IB_FLOW_SPEC_INNER) {
2759 	case IB_FLOW_SPEC_ETH:
2760 		ib_filter_sz = offsetof(struct ib_flow_eth_filter, real_sz);
2761 		actual_filter_sz = spec_filter_size(kern_spec_mask,
2762 						    kern_filter_sz,
2763 						    ib_filter_sz);
2764 		if (actual_filter_sz <= 0)
2765 			return -EINVAL;
2766 		ib_spec->size = sizeof(struct ib_flow_spec_eth);
2767 		memcpy(&ib_spec->eth.val, kern_spec_val, actual_filter_sz);
2768 		memcpy(&ib_spec->eth.mask, kern_spec_mask, actual_filter_sz);
2769 		break;
2770 	case IB_FLOW_SPEC_IPV4:
2771 		ib_filter_sz = offsetof(struct ib_flow_ipv4_filter, real_sz);
2772 		actual_filter_sz = spec_filter_size(kern_spec_mask,
2773 						    kern_filter_sz,
2774 						    ib_filter_sz);
2775 		if (actual_filter_sz <= 0)
2776 			return -EINVAL;
2777 		ib_spec->size = sizeof(struct ib_flow_spec_ipv4);
2778 		memcpy(&ib_spec->ipv4.val, kern_spec_val, actual_filter_sz);
2779 		memcpy(&ib_spec->ipv4.mask, kern_spec_mask, actual_filter_sz);
2780 		break;
2781 	case IB_FLOW_SPEC_IPV6:
2782 		ib_filter_sz = offsetof(struct ib_flow_ipv6_filter, real_sz);
2783 		actual_filter_sz = spec_filter_size(kern_spec_mask,
2784 						    kern_filter_sz,
2785 						    ib_filter_sz);
2786 		if (actual_filter_sz <= 0)
2787 			return -EINVAL;
2788 		ib_spec->size = sizeof(struct ib_flow_spec_ipv6);
2789 		memcpy(&ib_spec->ipv6.val, kern_spec_val, actual_filter_sz);
2790 		memcpy(&ib_spec->ipv6.mask, kern_spec_mask, actual_filter_sz);
2791 
2792 		if ((ntohl(ib_spec->ipv6.mask.flow_label)) >= BIT(20) ||
2793 		    (ntohl(ib_spec->ipv6.val.flow_label)) >= BIT(20))
2794 			return -EINVAL;
2795 		break;
2796 	case IB_FLOW_SPEC_TCP:
2797 	case IB_FLOW_SPEC_UDP:
2798 		ib_filter_sz = offsetof(struct ib_flow_tcp_udp_filter, real_sz);
2799 		actual_filter_sz = spec_filter_size(kern_spec_mask,
2800 						    kern_filter_sz,
2801 						    ib_filter_sz);
2802 		if (actual_filter_sz <= 0)
2803 			return -EINVAL;
2804 		ib_spec->size = sizeof(struct ib_flow_spec_tcp_udp);
2805 		memcpy(&ib_spec->tcp_udp.val, kern_spec_val, actual_filter_sz);
2806 		memcpy(&ib_spec->tcp_udp.mask, kern_spec_mask, actual_filter_sz);
2807 		break;
2808 	case IB_FLOW_SPEC_VXLAN_TUNNEL:
2809 		ib_filter_sz = offsetof(struct ib_flow_tunnel_filter, real_sz);
2810 		actual_filter_sz = spec_filter_size(kern_spec_mask,
2811 						    kern_filter_sz,
2812 						    ib_filter_sz);
2813 		if (actual_filter_sz <= 0)
2814 			return -EINVAL;
2815 		ib_spec->tunnel.size = sizeof(struct ib_flow_spec_tunnel);
2816 		memcpy(&ib_spec->tunnel.val, kern_spec_val, actual_filter_sz);
2817 		memcpy(&ib_spec->tunnel.mask, kern_spec_mask, actual_filter_sz);
2818 
2819 		if ((ntohl(ib_spec->tunnel.mask.tunnel_id)) >= BIT(24) ||
2820 		    (ntohl(ib_spec->tunnel.val.tunnel_id)) >= BIT(24))
2821 			return -EINVAL;
2822 		break;
2823 	case IB_FLOW_SPEC_ESP:
2824 		ib_filter_sz = offsetof(struct ib_flow_esp_filter, real_sz);
2825 		actual_filter_sz = spec_filter_size(kern_spec_mask,
2826 						    kern_filter_sz,
2827 						    ib_filter_sz);
2828 		if (actual_filter_sz <= 0)
2829 			return -EINVAL;
2830 		ib_spec->esp.size = sizeof(struct ib_flow_spec_esp);
2831 		memcpy(&ib_spec->esp.val, kern_spec_val, actual_filter_sz);
2832 		memcpy(&ib_spec->esp.mask, kern_spec_mask, actual_filter_sz);
2833 		break;
2834 	case IB_FLOW_SPEC_GRE:
2835 		ib_filter_sz = offsetof(struct ib_flow_gre_filter, real_sz);
2836 		actual_filter_sz = spec_filter_size(kern_spec_mask,
2837 						    kern_filter_sz,
2838 						    ib_filter_sz);
2839 		if (actual_filter_sz <= 0)
2840 			return -EINVAL;
2841 		ib_spec->gre.size = sizeof(struct ib_flow_spec_gre);
2842 		memcpy(&ib_spec->gre.val, kern_spec_val, actual_filter_sz);
2843 		memcpy(&ib_spec->gre.mask, kern_spec_mask, actual_filter_sz);
2844 		break;
2845 	case IB_FLOW_SPEC_MPLS:
2846 		ib_filter_sz = offsetof(struct ib_flow_mpls_filter, real_sz);
2847 		actual_filter_sz = spec_filter_size(kern_spec_mask,
2848 						    kern_filter_sz,
2849 						    ib_filter_sz);
2850 		if (actual_filter_sz <= 0)
2851 			return -EINVAL;
2852 		ib_spec->mpls.size = sizeof(struct ib_flow_spec_mpls);
2853 		memcpy(&ib_spec->mpls.val, kern_spec_val, actual_filter_sz);
2854 		memcpy(&ib_spec->mpls.mask, kern_spec_mask, actual_filter_sz);
2855 		break;
2856 	default:
2857 		return -EINVAL;
2858 	}
2859 	return 0;
2860 }
2861 
2862 static int kern_spec_to_ib_spec_filter(struct ib_uverbs_flow_spec *kern_spec,
2863 				       union ib_flow_spec *ib_spec)
2864 {
2865 	size_t kern_filter_sz;
2866 	void *kern_spec_mask;
2867 	void *kern_spec_val;
2868 
2869 	if (check_sub_overflow((size_t)kern_spec->hdr.size,
2870 			       sizeof(struct ib_uverbs_flow_spec_hdr),
2871 			       &kern_filter_sz))
2872 		return -EINVAL;
2873 
2874 	kern_filter_sz /= 2;
2875 
2876 	kern_spec_val = (void *)kern_spec +
2877 		sizeof(struct ib_uverbs_flow_spec_hdr);
2878 	kern_spec_mask = kern_spec_val + kern_filter_sz;
2879 
2880 	return ib_uverbs_kern_spec_to_ib_spec_filter(kern_spec->type,
2881 						     kern_spec_mask,
2882 						     kern_spec_val,
2883 						     kern_filter_sz, ib_spec);
2884 }
2885 
2886 static int kern_spec_to_ib_spec(struct uverbs_attr_bundle *attrs,
2887 				struct ib_uverbs_flow_spec *kern_spec,
2888 				union ib_flow_spec *ib_spec,
2889 				struct ib_uflow_resources *uflow_res)
2890 {
2891 	if (kern_spec->reserved)
2892 		return -EINVAL;
2893 
2894 	if (kern_spec->type >= IB_FLOW_SPEC_ACTION_TAG)
2895 		return kern_spec_to_ib_spec_action(attrs, kern_spec, ib_spec,
2896 						   uflow_res);
2897 	else
2898 		return kern_spec_to_ib_spec_filter(kern_spec, ib_spec);
2899 }
2900 
2901 static int ib_uverbs_ex_create_wq(struct uverbs_attr_bundle *attrs)
2902 {
2903 	struct ib_uverbs_ex_create_wq cmd;
2904 	struct ib_uverbs_ex_create_wq_resp resp = {};
2905 	struct ib_uwq_object           *obj;
2906 	int err = 0;
2907 	struct ib_cq *cq;
2908 	struct ib_pd *pd;
2909 	struct ib_wq *wq;
2910 	struct ib_wq_init_attr wq_init_attr = {};
2911 	struct ib_device *ib_dev;
2912 
2913 	err = uverbs_request(attrs, &cmd, sizeof(cmd));
2914 	if (err)
2915 		return err;
2916 
2917 	if (cmd.comp_mask)
2918 		return -EOPNOTSUPP;
2919 
2920 	obj = (struct ib_uwq_object *)uobj_alloc(UVERBS_OBJECT_WQ, attrs,
2921 						 &ib_dev);
2922 	if (IS_ERR(obj))
2923 		return PTR_ERR(obj);
2924 
2925 	pd = uobj_get_obj_read(pd, UVERBS_OBJECT_PD, cmd.pd_handle, attrs);
2926 	if (!pd) {
2927 		err = -EINVAL;
2928 		goto err_uobj;
2929 	}
2930 
2931 	cq = uobj_get_obj_read(cq, UVERBS_OBJECT_CQ, cmd.cq_handle, attrs);
2932 	if (!cq) {
2933 		err = -EINVAL;
2934 		goto err_put_pd;
2935 	}
2936 
2937 	wq_init_attr.cq = cq;
2938 	wq_init_attr.max_sge = cmd.max_sge;
2939 	wq_init_attr.max_wr = cmd.max_wr;
2940 	wq_init_attr.wq_type = cmd.wq_type;
2941 	wq_init_attr.event_handler = ib_uverbs_wq_event_handler;
2942 	wq_init_attr.create_flags = cmd.create_flags;
2943 	INIT_LIST_HEAD(&obj->uevent.event_list);
2944 	obj->uevent.uobject.user_handle = cmd.user_handle;
2945 
2946 	wq = pd->device->ops.create_wq(pd, &wq_init_attr, &attrs->driver_udata);
2947 	if (IS_ERR(wq)) {
2948 		err = PTR_ERR(wq);
2949 		goto err_put_cq;
2950 	}
2951 
2952 	wq->uobject = obj;
2953 	obj->uevent.uobject.object = wq;
2954 	wq->wq_type = wq_init_attr.wq_type;
2955 	wq->cq = cq;
2956 	wq->pd = pd;
2957 	wq->device = pd->device;
2958 	atomic_set(&wq->usecnt, 0);
2959 	atomic_inc(&pd->usecnt);
2960 	atomic_inc(&cq->usecnt);
2961 	obj->uevent.event_file = READ_ONCE(attrs->ufile->default_async_file);
2962 	if (obj->uevent.event_file)
2963 		uverbs_uobject_get(&obj->uevent.event_file->uobj);
2964 
2965 	uobj_put_obj_read(pd);
2966 	rdma_lookup_put_uobject(&cq->uobject->uevent.uobject,
2967 				UVERBS_LOOKUP_READ);
2968 	uobj_finalize_uobj_create(&obj->uevent.uobject, attrs);
2969 
2970 	resp.wq_handle = obj->uevent.uobject.id;
2971 	resp.max_sge = wq_init_attr.max_sge;
2972 	resp.max_wr = wq_init_attr.max_wr;
2973 	resp.wqn = wq->wq_num;
2974 	resp.response_length = uverbs_response_length(attrs, sizeof(resp));
2975 	return uverbs_response(attrs, &resp, sizeof(resp));
2976 
2977 err_put_cq:
2978 	rdma_lookup_put_uobject(&cq->uobject->uevent.uobject,
2979 				UVERBS_LOOKUP_READ);
2980 err_put_pd:
2981 	uobj_put_obj_read(pd);
2982 err_uobj:
2983 	uobj_alloc_abort(&obj->uevent.uobject, attrs);
2984 
2985 	return err;
2986 }
2987 
2988 static int ib_uverbs_ex_destroy_wq(struct uverbs_attr_bundle *attrs)
2989 {
2990 	struct ib_uverbs_ex_destroy_wq	cmd;
2991 	struct ib_uverbs_ex_destroy_wq_resp	resp = {};
2992 	struct ib_uobject		*uobj;
2993 	struct ib_uwq_object		*obj;
2994 	int				ret;
2995 
2996 	ret = uverbs_request(attrs, &cmd, sizeof(cmd));
2997 	if (ret)
2998 		return ret;
2999 
3000 	if (cmd.comp_mask)
3001 		return -EOPNOTSUPP;
3002 
3003 	resp.response_length = uverbs_response_length(attrs, sizeof(resp));
3004 	uobj = uobj_get_destroy(UVERBS_OBJECT_WQ, cmd.wq_handle, attrs);
3005 	if (IS_ERR(uobj))
3006 		return PTR_ERR(uobj);
3007 
3008 	obj = container_of(uobj, struct ib_uwq_object, uevent.uobject);
3009 	resp.events_reported = obj->uevent.events_reported;
3010 
3011 	uobj_put_destroy(uobj);
3012 
3013 	return uverbs_response(attrs, &resp, sizeof(resp));
3014 }
3015 
3016 static int ib_uverbs_ex_modify_wq(struct uverbs_attr_bundle *attrs)
3017 {
3018 	struct ib_uverbs_ex_modify_wq cmd;
3019 	struct ib_wq *wq;
3020 	struct ib_wq_attr wq_attr = {};
3021 	int ret;
3022 
3023 	ret = uverbs_request(attrs, &cmd, sizeof(cmd));
3024 	if (ret)
3025 		return ret;
3026 
3027 	if (!cmd.attr_mask)
3028 		return -EINVAL;
3029 
3030 	if (cmd.attr_mask > (IB_WQ_STATE | IB_WQ_CUR_STATE | IB_WQ_FLAGS))
3031 		return -EINVAL;
3032 
3033 	wq = uobj_get_obj_read(wq, UVERBS_OBJECT_WQ, cmd.wq_handle, attrs);
3034 	if (!wq)
3035 		return -EINVAL;
3036 
3037 	if (cmd.attr_mask & IB_WQ_FLAGS) {
3038 		wq_attr.flags = cmd.flags;
3039 		wq_attr.flags_mask = cmd.flags_mask;
3040 	}
3041 
3042 	if (cmd.attr_mask & IB_WQ_CUR_STATE) {
3043 		if (cmd.curr_wq_state > IB_WQS_ERR)
3044 			return -EINVAL;
3045 
3046 		wq_attr.curr_wq_state = cmd.curr_wq_state;
3047 	} else {
3048 		wq_attr.curr_wq_state = wq->state;
3049 	}
3050 
3051 	if (cmd.attr_mask & IB_WQ_STATE) {
3052 		if (cmd.wq_state > IB_WQS_ERR)
3053 			return -EINVAL;
3054 
3055 		wq_attr.wq_state = cmd.wq_state;
3056 	} else {
3057 		wq_attr.wq_state = wq_attr.curr_wq_state;
3058 	}
3059 
3060 	ret = wq->device->ops.modify_wq(wq, &wq_attr, cmd.attr_mask,
3061 					&attrs->driver_udata);
3062 	rdma_lookup_put_uobject(&wq->uobject->uevent.uobject,
3063 				UVERBS_LOOKUP_READ);
3064 	return ret;
3065 }
3066 
3067 static int ib_uverbs_ex_create_rwq_ind_table(struct uverbs_attr_bundle *attrs)
3068 {
3069 	struct ib_uverbs_ex_create_rwq_ind_table cmd;
3070 	struct ib_uverbs_ex_create_rwq_ind_table_resp  resp = {};
3071 	struct ib_uobject *uobj;
3072 	int err;
3073 	struct ib_rwq_ind_table_init_attr init_attr = {};
3074 	struct ib_rwq_ind_table *rwq_ind_tbl;
3075 	struct ib_wq **wqs = NULL;
3076 	u32 *wqs_handles = NULL;
3077 	struct ib_wq	*wq = NULL;
3078 	int i, num_read_wqs;
3079 	u32 num_wq_handles;
3080 	struct uverbs_req_iter iter;
3081 	struct ib_device *ib_dev;
3082 
3083 	err = uverbs_request_start(attrs, &iter, &cmd, sizeof(cmd));
3084 	if (err)
3085 		return err;
3086 
3087 	if (cmd.comp_mask)
3088 		return -EOPNOTSUPP;
3089 
3090 	if (cmd.log_ind_tbl_size > IB_USER_VERBS_MAX_LOG_IND_TBL_SIZE)
3091 		return -EINVAL;
3092 
3093 	num_wq_handles = 1 << cmd.log_ind_tbl_size;
3094 	wqs_handles = kcalloc(num_wq_handles, sizeof(*wqs_handles),
3095 			      GFP_KERNEL);
3096 	if (!wqs_handles)
3097 		return -ENOMEM;
3098 
3099 	err = uverbs_request_next(&iter, wqs_handles,
3100 				  num_wq_handles * sizeof(__u32));
3101 	if (err)
3102 		goto err_free;
3103 
3104 	err = uverbs_request_finish(&iter);
3105 	if (err)
3106 		goto err_free;
3107 
3108 	wqs = kcalloc(num_wq_handles, sizeof(*wqs), GFP_KERNEL);
3109 	if (!wqs) {
3110 		err = -ENOMEM;
3111 		goto  err_free;
3112 	}
3113 
3114 	for (num_read_wqs = 0; num_read_wqs < num_wq_handles;
3115 			num_read_wqs++) {
3116 		wq = uobj_get_obj_read(wq, UVERBS_OBJECT_WQ,
3117 				       wqs_handles[num_read_wqs], attrs);
3118 		if (!wq) {
3119 			err = -EINVAL;
3120 			goto put_wqs;
3121 		}
3122 
3123 		wqs[num_read_wqs] = wq;
3124 		atomic_inc(&wqs[num_read_wqs]->usecnt);
3125 	}
3126 
3127 	uobj = uobj_alloc(UVERBS_OBJECT_RWQ_IND_TBL, attrs, &ib_dev);
3128 	if (IS_ERR(uobj)) {
3129 		err = PTR_ERR(uobj);
3130 		goto put_wqs;
3131 	}
3132 
3133 	rwq_ind_tbl = rdma_zalloc_drv_obj(ib_dev, ib_rwq_ind_table);
3134 	if (!rwq_ind_tbl) {
3135 		err = -ENOMEM;
3136 		goto err_uobj;
3137 	}
3138 
3139 	init_attr.log_ind_tbl_size = cmd.log_ind_tbl_size;
3140 	init_attr.ind_tbl = wqs;
3141 
3142 	rwq_ind_tbl->ind_tbl = wqs;
3143 	rwq_ind_tbl->log_ind_tbl_size = init_attr.log_ind_tbl_size;
3144 	rwq_ind_tbl->uobject = uobj;
3145 	uobj->object = rwq_ind_tbl;
3146 	rwq_ind_tbl->device = ib_dev;
3147 	atomic_set(&rwq_ind_tbl->usecnt, 0);
3148 
3149 	err = ib_dev->ops.create_rwq_ind_table(rwq_ind_tbl, &init_attr,
3150 					       &attrs->driver_udata);
3151 	if (err)
3152 		goto err_create;
3153 
3154 	for (i = 0; i < num_wq_handles; i++)
3155 		rdma_lookup_put_uobject(&wqs[i]->uobject->uevent.uobject,
3156 					UVERBS_LOOKUP_READ);
3157 	kfree(wqs_handles);
3158 	uobj_finalize_uobj_create(uobj, attrs);
3159 
3160 	resp.ind_tbl_handle = uobj->id;
3161 	resp.ind_tbl_num = rwq_ind_tbl->ind_tbl_num;
3162 	resp.response_length = uverbs_response_length(attrs, sizeof(resp));
3163 	return uverbs_response(attrs, &resp, sizeof(resp));
3164 
3165 err_create:
3166 	kfree(rwq_ind_tbl);
3167 err_uobj:
3168 	uobj_alloc_abort(uobj, attrs);
3169 put_wqs:
3170 	for (i = 0; i < num_read_wqs; i++) {
3171 		rdma_lookup_put_uobject(&wqs[i]->uobject->uevent.uobject,
3172 					UVERBS_LOOKUP_READ);
3173 		atomic_dec(&wqs[i]->usecnt);
3174 	}
3175 err_free:
3176 	kfree(wqs_handles);
3177 	kfree(wqs);
3178 	return err;
3179 }
3180 
3181 static int ib_uverbs_ex_destroy_rwq_ind_table(struct uverbs_attr_bundle *attrs)
3182 {
3183 	struct ib_uverbs_ex_destroy_rwq_ind_table cmd;
3184 	int ret;
3185 
3186 	ret = uverbs_request(attrs, &cmd, sizeof(cmd));
3187 	if (ret)
3188 		return ret;
3189 
3190 	if (cmd.comp_mask)
3191 		return -EOPNOTSUPP;
3192 
3193 	return uobj_perform_destroy(UVERBS_OBJECT_RWQ_IND_TBL,
3194 				    cmd.ind_tbl_handle, attrs);
3195 }
3196 
3197 static int ib_uverbs_ex_create_flow(struct uverbs_attr_bundle *attrs)
3198 {
3199 	struct ib_uverbs_create_flow	  cmd;
3200 	struct ib_uverbs_create_flow_resp resp = {};
3201 	struct ib_uobject		  *uobj;
3202 	struct ib_flow			  *flow_id;
3203 	struct ib_uverbs_flow_attr	  *kern_flow_attr;
3204 	struct ib_flow_attr		  *flow_attr;
3205 	struct ib_qp			  *qp;
3206 	struct ib_uflow_resources	  *uflow_res;
3207 	struct ib_uverbs_flow_spec_hdr	  *kern_spec;
3208 	struct uverbs_req_iter iter;
3209 	int err;
3210 	void *ib_spec;
3211 	int i;
3212 	struct ib_device *ib_dev;
3213 
3214 	err = uverbs_request_start(attrs, &iter, &cmd, sizeof(cmd));
3215 	if (err)
3216 		return err;
3217 
3218 	if (cmd.comp_mask)
3219 		return -EINVAL;
3220 
3221 	if (!capable(CAP_NET_RAW))
3222 		return -EPERM;
3223 
3224 	if (cmd.flow_attr.flags >= IB_FLOW_ATTR_FLAGS_RESERVED)
3225 		return -EINVAL;
3226 
3227 	if ((cmd.flow_attr.flags & IB_FLOW_ATTR_FLAGS_DONT_TRAP) &&
3228 	    ((cmd.flow_attr.type == IB_FLOW_ATTR_ALL_DEFAULT) ||
3229 	     (cmd.flow_attr.type == IB_FLOW_ATTR_MC_DEFAULT)))
3230 		return -EINVAL;
3231 
3232 	if (cmd.flow_attr.num_of_specs > IB_FLOW_SPEC_SUPPORT_LAYERS)
3233 		return -EINVAL;
3234 
3235 	if (cmd.flow_attr.size >
3236 	    (cmd.flow_attr.num_of_specs * sizeof(struct ib_uverbs_flow_spec)))
3237 		return -EINVAL;
3238 
3239 	if (cmd.flow_attr.reserved[0] ||
3240 	    cmd.flow_attr.reserved[1])
3241 		return -EINVAL;
3242 
3243 	if (cmd.flow_attr.num_of_specs) {
3244 		kern_flow_attr = kmalloc(sizeof(*kern_flow_attr) + cmd.flow_attr.size,
3245 					 GFP_KERNEL);
3246 		if (!kern_flow_attr)
3247 			return -ENOMEM;
3248 
3249 		*kern_flow_attr = cmd.flow_attr;
3250 		err = uverbs_request_next(&iter, &kern_flow_attr->flow_specs,
3251 					  cmd.flow_attr.size);
3252 		if (err)
3253 			goto err_free_attr;
3254 	} else {
3255 		kern_flow_attr = &cmd.flow_attr;
3256 	}
3257 
3258 	err = uverbs_request_finish(&iter);
3259 	if (err)
3260 		goto err_free_attr;
3261 
3262 	uobj = uobj_alloc(UVERBS_OBJECT_FLOW, attrs, &ib_dev);
3263 	if (IS_ERR(uobj)) {
3264 		err = PTR_ERR(uobj);
3265 		goto err_free_attr;
3266 	}
3267 
3268 	if (!rdma_is_port_valid(uobj->context->device, cmd.flow_attr.port)) {
3269 		err = -EINVAL;
3270 		goto err_uobj;
3271 	}
3272 
3273 	qp = uobj_get_obj_read(qp, UVERBS_OBJECT_QP, cmd.qp_handle, attrs);
3274 	if (!qp) {
3275 		err = -EINVAL;
3276 		goto err_uobj;
3277 	}
3278 
3279 	if (qp->qp_type != IB_QPT_UD && qp->qp_type != IB_QPT_RAW_PACKET) {
3280 		err = -EINVAL;
3281 		goto err_put;
3282 	}
3283 
3284 	flow_attr = kzalloc(struct_size(flow_attr, flows,
3285 				cmd.flow_attr.num_of_specs), GFP_KERNEL);
3286 	if (!flow_attr) {
3287 		err = -ENOMEM;
3288 		goto err_put;
3289 	}
3290 	uflow_res = flow_resources_alloc(cmd.flow_attr.num_of_specs);
3291 	if (!uflow_res) {
3292 		err = -ENOMEM;
3293 		goto err_free_flow_attr;
3294 	}
3295 
3296 	flow_attr->type = kern_flow_attr->type;
3297 	flow_attr->priority = kern_flow_attr->priority;
3298 	flow_attr->num_of_specs = kern_flow_attr->num_of_specs;
3299 	flow_attr->port = kern_flow_attr->port;
3300 	flow_attr->flags = kern_flow_attr->flags;
3301 	flow_attr->size = sizeof(*flow_attr);
3302 
3303 	kern_spec = kern_flow_attr->flow_specs;
3304 	ib_spec = flow_attr + 1;
3305 	for (i = 0; i < flow_attr->num_of_specs &&
3306 			cmd.flow_attr.size >= sizeof(*kern_spec) &&
3307 			cmd.flow_attr.size >= kern_spec->size;
3308 	     i++) {
3309 		err = kern_spec_to_ib_spec(
3310 				attrs, (struct ib_uverbs_flow_spec *)kern_spec,
3311 				ib_spec, uflow_res);
3312 		if (err)
3313 			goto err_free;
3314 
3315 		flow_attr->size +=
3316 			((union ib_flow_spec *) ib_spec)->size;
3317 		cmd.flow_attr.size -= kern_spec->size;
3318 		kern_spec = ((void *)kern_spec) + kern_spec->size;
3319 		ib_spec += ((union ib_flow_spec *) ib_spec)->size;
3320 	}
3321 	if (cmd.flow_attr.size || (i != flow_attr->num_of_specs)) {
3322 		pr_warn("create flow failed, flow %d: %u bytes left from uverb cmd\n",
3323 			i, cmd.flow_attr.size);
3324 		err = -EINVAL;
3325 		goto err_free;
3326 	}
3327 
3328 	flow_id = qp->device->ops.create_flow(qp, flow_attr,
3329 					      &attrs->driver_udata);
3330 
3331 	if (IS_ERR(flow_id)) {
3332 		err = PTR_ERR(flow_id);
3333 		goto err_free;
3334 	}
3335 
3336 	ib_set_flow(uobj, flow_id, qp, qp->device, uflow_res);
3337 
3338 	rdma_lookup_put_uobject(&qp->uobject->uevent.uobject,
3339 				UVERBS_LOOKUP_READ);
3340 	kfree(flow_attr);
3341 
3342 	if (cmd.flow_attr.num_of_specs)
3343 		kfree(kern_flow_attr);
3344 	uobj_finalize_uobj_create(uobj, attrs);
3345 
3346 	resp.flow_handle = uobj->id;
3347 	return uverbs_response(attrs, &resp, sizeof(resp));
3348 
3349 err_free:
3350 	ib_uverbs_flow_resources_free(uflow_res);
3351 err_free_flow_attr:
3352 	kfree(flow_attr);
3353 err_put:
3354 	rdma_lookup_put_uobject(&qp->uobject->uevent.uobject,
3355 				UVERBS_LOOKUP_READ);
3356 err_uobj:
3357 	uobj_alloc_abort(uobj, attrs);
3358 err_free_attr:
3359 	if (cmd.flow_attr.num_of_specs)
3360 		kfree(kern_flow_attr);
3361 	return err;
3362 }
3363 
3364 static int ib_uverbs_ex_destroy_flow(struct uverbs_attr_bundle *attrs)
3365 {
3366 	struct ib_uverbs_destroy_flow	cmd;
3367 	int				ret;
3368 
3369 	ret = uverbs_request(attrs, &cmd, sizeof(cmd));
3370 	if (ret)
3371 		return ret;
3372 
3373 	if (cmd.comp_mask)
3374 		return -EINVAL;
3375 
3376 	return uobj_perform_destroy(UVERBS_OBJECT_FLOW, cmd.flow_handle, attrs);
3377 }
3378 
3379 static int __uverbs_create_xsrq(struct uverbs_attr_bundle *attrs,
3380 				struct ib_uverbs_create_xsrq *cmd,
3381 				struct ib_udata *udata)
3382 {
3383 	struct ib_uverbs_create_srq_resp resp = {};
3384 	struct ib_usrq_object           *obj;
3385 	struct ib_pd                    *pd;
3386 	struct ib_srq                   *srq;
3387 	struct ib_srq_init_attr          attr;
3388 	int ret;
3389 	struct ib_uobject *xrcd_uobj;
3390 	struct ib_device *ib_dev;
3391 
3392 	obj = (struct ib_usrq_object *)uobj_alloc(UVERBS_OBJECT_SRQ, attrs,
3393 						  &ib_dev);
3394 	if (IS_ERR(obj))
3395 		return PTR_ERR(obj);
3396 
3397 	if (cmd->srq_type == IB_SRQT_TM)
3398 		attr.ext.tag_matching.max_num_tags = cmd->max_num_tags;
3399 
3400 	if (cmd->srq_type == IB_SRQT_XRC) {
3401 		xrcd_uobj = uobj_get_read(UVERBS_OBJECT_XRCD, cmd->xrcd_handle,
3402 					  attrs);
3403 		if (IS_ERR(xrcd_uobj)) {
3404 			ret = -EINVAL;
3405 			goto err;
3406 		}
3407 
3408 		attr.ext.xrc.xrcd = (struct ib_xrcd *)xrcd_uobj->object;
3409 		if (!attr.ext.xrc.xrcd) {
3410 			ret = -EINVAL;
3411 			goto err_put_xrcd;
3412 		}
3413 
3414 		obj->uxrcd = container_of(xrcd_uobj, struct ib_uxrcd_object, uobject);
3415 		atomic_inc(&obj->uxrcd->refcnt);
3416 	}
3417 
3418 	if (ib_srq_has_cq(cmd->srq_type)) {
3419 		attr.ext.cq = uobj_get_obj_read(cq, UVERBS_OBJECT_CQ,
3420 						cmd->cq_handle, attrs);
3421 		if (!attr.ext.cq) {
3422 			ret = -EINVAL;
3423 			goto err_put_xrcd;
3424 		}
3425 	}
3426 
3427 	pd = uobj_get_obj_read(pd, UVERBS_OBJECT_PD, cmd->pd_handle, attrs);
3428 	if (!pd) {
3429 		ret = -EINVAL;
3430 		goto err_put_cq;
3431 	}
3432 
3433 	attr.event_handler  = ib_uverbs_srq_event_handler;
3434 	attr.srq_type       = cmd->srq_type;
3435 	attr.attr.max_wr    = cmd->max_wr;
3436 	attr.attr.max_sge   = cmd->max_sge;
3437 	attr.attr.srq_limit = cmd->srq_limit;
3438 
3439 	INIT_LIST_HEAD(&obj->uevent.event_list);
3440 	obj->uevent.uobject.user_handle = cmd->user_handle;
3441 
3442 	srq = ib_create_srq_user(pd, &attr, obj, udata);
3443 	if (IS_ERR(srq)) {
3444 		ret = PTR_ERR(srq);
3445 		goto err_put_pd;
3446 	}
3447 
3448 	obj->uevent.uobject.object = srq;
3449 	obj->uevent.uobject.user_handle = cmd->user_handle;
3450 	obj->uevent.event_file = READ_ONCE(attrs->ufile->default_async_file);
3451 	if (obj->uevent.event_file)
3452 		uverbs_uobject_get(&obj->uevent.event_file->uobj);
3453 
3454 	if (cmd->srq_type == IB_SRQT_XRC)
3455 		resp.srqn = srq->ext.xrc.srq_num;
3456 
3457 	if (cmd->srq_type == IB_SRQT_XRC)
3458 		uobj_put_read(xrcd_uobj);
3459 
3460 	if (ib_srq_has_cq(cmd->srq_type))
3461 		rdma_lookup_put_uobject(&attr.ext.cq->uobject->uevent.uobject,
3462 					UVERBS_LOOKUP_READ);
3463 
3464 	uobj_put_obj_read(pd);
3465 	uobj_finalize_uobj_create(&obj->uevent.uobject, attrs);
3466 
3467 	resp.srq_handle = obj->uevent.uobject.id;
3468 	resp.max_wr = attr.attr.max_wr;
3469 	resp.max_sge = attr.attr.max_sge;
3470 	return uverbs_response(attrs, &resp, sizeof(resp));
3471 
3472 err_put_pd:
3473 	uobj_put_obj_read(pd);
3474 err_put_cq:
3475 	if (ib_srq_has_cq(cmd->srq_type))
3476 		rdma_lookup_put_uobject(&attr.ext.cq->uobject->uevent.uobject,
3477 					UVERBS_LOOKUP_READ);
3478 
3479 err_put_xrcd:
3480 	if (cmd->srq_type == IB_SRQT_XRC) {
3481 		atomic_dec(&obj->uxrcd->refcnt);
3482 		uobj_put_read(xrcd_uobj);
3483 	}
3484 
3485 err:
3486 	uobj_alloc_abort(&obj->uevent.uobject, attrs);
3487 	return ret;
3488 }
3489 
3490 static int ib_uverbs_create_srq(struct uverbs_attr_bundle *attrs)
3491 {
3492 	struct ib_uverbs_create_srq      cmd;
3493 	struct ib_uverbs_create_xsrq     xcmd;
3494 	int ret;
3495 
3496 	ret = uverbs_request(attrs, &cmd, sizeof(cmd));
3497 	if (ret)
3498 		return ret;
3499 
3500 	memset(&xcmd, 0, sizeof(xcmd));
3501 	xcmd.response	 = cmd.response;
3502 	xcmd.user_handle = cmd.user_handle;
3503 	xcmd.srq_type	 = IB_SRQT_BASIC;
3504 	xcmd.pd_handle	 = cmd.pd_handle;
3505 	xcmd.max_wr	 = cmd.max_wr;
3506 	xcmd.max_sge	 = cmd.max_sge;
3507 	xcmd.srq_limit	 = cmd.srq_limit;
3508 
3509 	return __uverbs_create_xsrq(attrs, &xcmd, &attrs->driver_udata);
3510 }
3511 
3512 static int ib_uverbs_create_xsrq(struct uverbs_attr_bundle *attrs)
3513 {
3514 	struct ib_uverbs_create_xsrq     cmd;
3515 	int ret;
3516 
3517 	ret = uverbs_request(attrs, &cmd, sizeof(cmd));
3518 	if (ret)
3519 		return ret;
3520 
3521 	return __uverbs_create_xsrq(attrs, &cmd, &attrs->driver_udata);
3522 }
3523 
3524 static int ib_uverbs_modify_srq(struct uverbs_attr_bundle *attrs)
3525 {
3526 	struct ib_uverbs_modify_srq cmd;
3527 	struct ib_srq              *srq;
3528 	struct ib_srq_attr          attr;
3529 	int                         ret;
3530 
3531 	ret = uverbs_request(attrs, &cmd, sizeof(cmd));
3532 	if (ret)
3533 		return ret;
3534 
3535 	srq = uobj_get_obj_read(srq, UVERBS_OBJECT_SRQ, cmd.srq_handle, attrs);
3536 	if (!srq)
3537 		return -EINVAL;
3538 
3539 	attr.max_wr    = cmd.max_wr;
3540 	attr.srq_limit = cmd.srq_limit;
3541 
3542 	ret = srq->device->ops.modify_srq(srq, &attr, cmd.attr_mask,
3543 					  &attrs->driver_udata);
3544 
3545 	rdma_lookup_put_uobject(&srq->uobject->uevent.uobject,
3546 				UVERBS_LOOKUP_READ);
3547 
3548 	return ret;
3549 }
3550 
3551 static int ib_uverbs_query_srq(struct uverbs_attr_bundle *attrs)
3552 {
3553 	struct ib_uverbs_query_srq      cmd;
3554 	struct ib_uverbs_query_srq_resp resp;
3555 	struct ib_srq_attr              attr;
3556 	struct ib_srq                   *srq;
3557 	int                             ret;
3558 
3559 	ret = uverbs_request(attrs, &cmd, sizeof(cmd));
3560 	if (ret)
3561 		return ret;
3562 
3563 	srq = uobj_get_obj_read(srq, UVERBS_OBJECT_SRQ, cmd.srq_handle, attrs);
3564 	if (!srq)
3565 		return -EINVAL;
3566 
3567 	ret = ib_query_srq(srq, &attr);
3568 
3569 	rdma_lookup_put_uobject(&srq->uobject->uevent.uobject,
3570 				UVERBS_LOOKUP_READ);
3571 
3572 	if (ret)
3573 		return ret;
3574 
3575 	memset(&resp, 0, sizeof resp);
3576 
3577 	resp.max_wr    = attr.max_wr;
3578 	resp.max_sge   = attr.max_sge;
3579 	resp.srq_limit = attr.srq_limit;
3580 
3581 	return uverbs_response(attrs, &resp, sizeof(resp));
3582 }
3583 
3584 static int ib_uverbs_destroy_srq(struct uverbs_attr_bundle *attrs)
3585 {
3586 	struct ib_uverbs_destroy_srq      cmd;
3587 	struct ib_uverbs_destroy_srq_resp resp;
3588 	struct ib_uobject		 *uobj;
3589 	struct ib_uevent_object        	 *obj;
3590 	int ret;
3591 
3592 	ret = uverbs_request(attrs, &cmd, sizeof(cmd));
3593 	if (ret)
3594 		return ret;
3595 
3596 	uobj = uobj_get_destroy(UVERBS_OBJECT_SRQ, cmd.srq_handle, attrs);
3597 	if (IS_ERR(uobj))
3598 		return PTR_ERR(uobj);
3599 
3600 	obj = container_of(uobj, struct ib_uevent_object, uobject);
3601 	memset(&resp, 0, sizeof(resp));
3602 	resp.events_reported = obj->events_reported;
3603 
3604 	uobj_put_destroy(uobj);
3605 
3606 	return uverbs_response(attrs, &resp, sizeof(resp));
3607 }
3608 
3609 static int ib_uverbs_ex_query_device(struct uverbs_attr_bundle *attrs)
3610 {
3611 	struct ib_uverbs_ex_query_device_resp resp = {};
3612 	struct ib_uverbs_ex_query_device  cmd;
3613 	struct ib_device_attr attr = {0};
3614 	struct ib_ucontext *ucontext;
3615 	struct ib_device *ib_dev;
3616 	int err;
3617 
3618 	ucontext = ib_uverbs_get_ucontext(attrs);
3619 	if (IS_ERR(ucontext))
3620 		return PTR_ERR(ucontext);
3621 	ib_dev = ucontext->device;
3622 
3623 	err = uverbs_request(attrs, &cmd, sizeof(cmd));
3624 	if (err)
3625 		return err;
3626 
3627 	if (cmd.comp_mask)
3628 		return -EINVAL;
3629 
3630 	if (cmd.reserved)
3631 		return -EINVAL;
3632 
3633 	err = ib_dev->ops.query_device(ib_dev, &attr, &attrs->driver_udata);
3634 	if (err)
3635 		return err;
3636 
3637 	copy_query_dev_fields(ucontext, &resp.base, &attr);
3638 
3639 	resp.odp_caps.general_caps = attr.odp_caps.general_caps;
3640 	resp.odp_caps.per_transport_caps.rc_odp_caps =
3641 		attr.odp_caps.per_transport_caps.rc_odp_caps;
3642 	resp.odp_caps.per_transport_caps.uc_odp_caps =
3643 		attr.odp_caps.per_transport_caps.uc_odp_caps;
3644 	resp.odp_caps.per_transport_caps.ud_odp_caps =
3645 		attr.odp_caps.per_transport_caps.ud_odp_caps;
3646 	resp.xrc_odp_caps = attr.odp_caps.per_transport_caps.xrc_odp_caps;
3647 
3648 	resp.timestamp_mask = attr.timestamp_mask;
3649 	resp.hca_core_clock = attr.hca_core_clock;
3650 	resp.device_cap_flags_ex = attr.device_cap_flags;
3651 	resp.rss_caps.supported_qpts = attr.rss_caps.supported_qpts;
3652 	resp.rss_caps.max_rwq_indirection_tables =
3653 		attr.rss_caps.max_rwq_indirection_tables;
3654 	resp.rss_caps.max_rwq_indirection_table_size =
3655 		attr.rss_caps.max_rwq_indirection_table_size;
3656 	resp.max_wq_type_rq = attr.max_wq_type_rq;
3657 	resp.raw_packet_caps = attr.raw_packet_caps;
3658 	resp.tm_caps.max_rndv_hdr_size	= attr.tm_caps.max_rndv_hdr_size;
3659 	resp.tm_caps.max_num_tags	= attr.tm_caps.max_num_tags;
3660 	resp.tm_caps.max_ops		= attr.tm_caps.max_ops;
3661 	resp.tm_caps.max_sge		= attr.tm_caps.max_sge;
3662 	resp.tm_caps.flags		= attr.tm_caps.flags;
3663 	resp.cq_moderation_caps.max_cq_moderation_count  =
3664 		attr.cq_caps.max_cq_moderation_count;
3665 	resp.cq_moderation_caps.max_cq_moderation_period =
3666 		attr.cq_caps.max_cq_moderation_period;
3667 	resp.max_dm_size = attr.max_dm_size;
3668 	resp.response_length = uverbs_response_length(attrs, sizeof(resp));
3669 
3670 	return uverbs_response(attrs, &resp, sizeof(resp));
3671 }
3672 
3673 static int ib_uverbs_ex_modify_cq(struct uverbs_attr_bundle *attrs)
3674 {
3675 	struct ib_uverbs_ex_modify_cq cmd;
3676 	struct ib_cq *cq;
3677 	int ret;
3678 
3679 	ret = uverbs_request(attrs, &cmd, sizeof(cmd));
3680 	if (ret)
3681 		return ret;
3682 
3683 	if (!cmd.attr_mask || cmd.reserved)
3684 		return -EINVAL;
3685 
3686 	if (cmd.attr_mask > IB_CQ_MODERATE)
3687 		return -EOPNOTSUPP;
3688 
3689 	cq = uobj_get_obj_read(cq, UVERBS_OBJECT_CQ, cmd.cq_handle, attrs);
3690 	if (!cq)
3691 		return -EINVAL;
3692 
3693 	ret = rdma_set_cq_moderation(cq, cmd.attr.cq_count, cmd.attr.cq_period);
3694 
3695 	rdma_lookup_put_uobject(&cq->uobject->uevent.uobject,
3696 				UVERBS_LOOKUP_READ);
3697 	return ret;
3698 }
3699 
3700 /*
3701  * Describe the input structs for write(). Some write methods have an input
3702  * only struct, most have an input and output. If the struct has an output then
3703  * the 'response' u64 must be the first field in the request structure.
3704  *
3705  * If udata is present then both the request and response structs have a
3706  * trailing driver_data flex array. In this case the size of the base struct
3707  * cannot be changed.
3708  */
3709 #define UAPI_DEF_WRITE_IO(req, resp)                                           \
3710 	.write.has_resp = 1 +                                                  \
3711 			  BUILD_BUG_ON_ZERO(offsetof(req, response) != 0) +    \
3712 			  BUILD_BUG_ON_ZERO(sizeof_field(req, response) !=    \
3713 					    sizeof(u64)),                      \
3714 	.write.req_size = sizeof(req), .write.resp_size = sizeof(resp)
3715 
3716 #define UAPI_DEF_WRITE_I(req) .write.req_size = sizeof(req)
3717 
3718 #define UAPI_DEF_WRITE_UDATA_IO(req, resp)                                     \
3719 	UAPI_DEF_WRITE_IO(req, resp),                                          \
3720 		.write.has_udata =                                             \
3721 			1 +                                                    \
3722 			BUILD_BUG_ON_ZERO(offsetof(req, driver_data) !=        \
3723 					  sizeof(req)) +                       \
3724 			BUILD_BUG_ON_ZERO(offsetof(resp, driver_data) !=       \
3725 					  sizeof(resp))
3726 
3727 #define UAPI_DEF_WRITE_UDATA_I(req)                                            \
3728 	UAPI_DEF_WRITE_I(req),                                                 \
3729 		.write.has_udata =                                             \
3730 			1 + BUILD_BUG_ON_ZERO(offsetof(req, driver_data) !=    \
3731 					      sizeof(req))
3732 
3733 /*
3734  * The _EX versions are for use with WRITE_EX and allow the last struct member
3735  * to be specified. Buffers that do not include that member will be rejected.
3736  */
3737 #define UAPI_DEF_WRITE_IO_EX(req, req_last_member, resp, resp_last_member)     \
3738 	.write.has_resp = 1,                                                   \
3739 	.write.req_size = offsetofend(req, req_last_member),                   \
3740 	.write.resp_size = offsetofend(resp, resp_last_member)
3741 
3742 #define UAPI_DEF_WRITE_I_EX(req, req_last_member)                              \
3743 	.write.req_size = offsetofend(req, req_last_member)
3744 
3745 const struct uapi_definition uverbs_def_write_intf[] = {
3746 	DECLARE_UVERBS_OBJECT(
3747 		UVERBS_OBJECT_AH,
3748 		DECLARE_UVERBS_WRITE(IB_USER_VERBS_CMD_CREATE_AH,
3749 				     ib_uverbs_create_ah,
3750 				     UAPI_DEF_WRITE_UDATA_IO(
3751 					     struct ib_uverbs_create_ah,
3752 					     struct ib_uverbs_create_ah_resp)),
3753 		DECLARE_UVERBS_WRITE(
3754 			IB_USER_VERBS_CMD_DESTROY_AH,
3755 			ib_uverbs_destroy_ah,
3756 			UAPI_DEF_WRITE_I(struct ib_uverbs_destroy_ah)),
3757 		UAPI_DEF_OBJ_NEEDS_FN(create_user_ah),
3758 		UAPI_DEF_OBJ_NEEDS_FN(destroy_ah)),
3759 
3760 	DECLARE_UVERBS_OBJECT(
3761 		UVERBS_OBJECT_COMP_CHANNEL,
3762 		DECLARE_UVERBS_WRITE(
3763 			IB_USER_VERBS_CMD_CREATE_COMP_CHANNEL,
3764 			ib_uverbs_create_comp_channel,
3765 			UAPI_DEF_WRITE_IO(
3766 				struct ib_uverbs_create_comp_channel,
3767 				struct ib_uverbs_create_comp_channel_resp))),
3768 
3769 	DECLARE_UVERBS_OBJECT(
3770 		UVERBS_OBJECT_CQ,
3771 		DECLARE_UVERBS_WRITE(IB_USER_VERBS_CMD_CREATE_CQ,
3772 				     ib_uverbs_create_cq,
3773 				     UAPI_DEF_WRITE_UDATA_IO(
3774 					     struct ib_uverbs_create_cq,
3775 					     struct ib_uverbs_create_cq_resp),
3776 				     UAPI_DEF_METHOD_NEEDS_FN(create_cq)),
3777 		DECLARE_UVERBS_WRITE(
3778 			IB_USER_VERBS_CMD_DESTROY_CQ,
3779 			ib_uverbs_destroy_cq,
3780 			UAPI_DEF_WRITE_IO(struct ib_uverbs_destroy_cq,
3781 					  struct ib_uverbs_destroy_cq_resp),
3782 			UAPI_DEF_METHOD_NEEDS_FN(destroy_cq)),
3783 		DECLARE_UVERBS_WRITE(
3784 			IB_USER_VERBS_CMD_POLL_CQ,
3785 			ib_uverbs_poll_cq,
3786 			UAPI_DEF_WRITE_IO(struct ib_uverbs_poll_cq,
3787 					  struct ib_uverbs_poll_cq_resp),
3788 			UAPI_DEF_METHOD_NEEDS_FN(poll_cq)),
3789 		DECLARE_UVERBS_WRITE(
3790 			IB_USER_VERBS_CMD_REQ_NOTIFY_CQ,
3791 			ib_uverbs_req_notify_cq,
3792 			UAPI_DEF_WRITE_I(struct ib_uverbs_req_notify_cq),
3793 			UAPI_DEF_METHOD_NEEDS_FN(req_notify_cq)),
3794 		DECLARE_UVERBS_WRITE(IB_USER_VERBS_CMD_RESIZE_CQ,
3795 				     ib_uverbs_resize_cq,
3796 				     UAPI_DEF_WRITE_UDATA_IO(
3797 					     struct ib_uverbs_resize_cq,
3798 					     struct ib_uverbs_resize_cq_resp),
3799 				     UAPI_DEF_METHOD_NEEDS_FN(resize_cq)),
3800 		DECLARE_UVERBS_WRITE_EX(
3801 			IB_USER_VERBS_EX_CMD_CREATE_CQ,
3802 			ib_uverbs_ex_create_cq,
3803 			UAPI_DEF_WRITE_IO_EX(struct ib_uverbs_ex_create_cq,
3804 					     reserved,
3805 					     struct ib_uverbs_ex_create_cq_resp,
3806 					     response_length),
3807 			UAPI_DEF_METHOD_NEEDS_FN(create_cq)),
3808 		DECLARE_UVERBS_WRITE_EX(
3809 			IB_USER_VERBS_EX_CMD_MODIFY_CQ,
3810 			ib_uverbs_ex_modify_cq,
3811 			UAPI_DEF_WRITE_I(struct ib_uverbs_ex_modify_cq),
3812 			UAPI_DEF_METHOD_NEEDS_FN(modify_cq))),
3813 
3814 	DECLARE_UVERBS_OBJECT(
3815 		UVERBS_OBJECT_DEVICE,
3816 		DECLARE_UVERBS_WRITE(IB_USER_VERBS_CMD_GET_CONTEXT,
3817 				     ib_uverbs_get_context,
3818 				     UAPI_DEF_WRITE_UDATA_IO(
3819 					     struct ib_uverbs_get_context,
3820 					     struct ib_uverbs_get_context_resp)),
3821 		DECLARE_UVERBS_WRITE(
3822 			IB_USER_VERBS_CMD_QUERY_DEVICE,
3823 			ib_uverbs_query_device,
3824 			UAPI_DEF_WRITE_IO(struct ib_uverbs_query_device,
3825 					  struct ib_uverbs_query_device_resp)),
3826 		DECLARE_UVERBS_WRITE(
3827 			IB_USER_VERBS_CMD_QUERY_PORT,
3828 			ib_uverbs_query_port,
3829 			UAPI_DEF_WRITE_IO(struct ib_uverbs_query_port,
3830 					  struct ib_uverbs_query_port_resp),
3831 			UAPI_DEF_METHOD_NEEDS_FN(query_port)),
3832 		DECLARE_UVERBS_WRITE_EX(
3833 			IB_USER_VERBS_EX_CMD_QUERY_DEVICE,
3834 			ib_uverbs_ex_query_device,
3835 			UAPI_DEF_WRITE_IO_EX(
3836 				struct ib_uverbs_ex_query_device,
3837 				reserved,
3838 				struct ib_uverbs_ex_query_device_resp,
3839 				response_length),
3840 			UAPI_DEF_METHOD_NEEDS_FN(query_device)),
3841 		UAPI_DEF_OBJ_NEEDS_FN(alloc_ucontext),
3842 		UAPI_DEF_OBJ_NEEDS_FN(dealloc_ucontext)),
3843 
3844 	DECLARE_UVERBS_OBJECT(
3845 		UVERBS_OBJECT_FLOW,
3846 		DECLARE_UVERBS_WRITE_EX(
3847 			IB_USER_VERBS_EX_CMD_CREATE_FLOW,
3848 			ib_uverbs_ex_create_flow,
3849 			UAPI_DEF_WRITE_IO_EX(struct ib_uverbs_create_flow,
3850 					     flow_attr,
3851 					     struct ib_uverbs_create_flow_resp,
3852 					     flow_handle),
3853 			UAPI_DEF_METHOD_NEEDS_FN(create_flow)),
3854 		DECLARE_UVERBS_WRITE_EX(
3855 			IB_USER_VERBS_EX_CMD_DESTROY_FLOW,
3856 			ib_uverbs_ex_destroy_flow,
3857 			UAPI_DEF_WRITE_I(struct ib_uverbs_destroy_flow),
3858 			UAPI_DEF_METHOD_NEEDS_FN(destroy_flow))),
3859 
3860 	DECLARE_UVERBS_OBJECT(
3861 		UVERBS_OBJECT_MR,
3862 		DECLARE_UVERBS_WRITE(IB_USER_VERBS_CMD_DEREG_MR,
3863 				     ib_uverbs_dereg_mr,
3864 				     UAPI_DEF_WRITE_I(struct ib_uverbs_dereg_mr),
3865 				     UAPI_DEF_METHOD_NEEDS_FN(dereg_mr)),
3866 		DECLARE_UVERBS_WRITE(
3867 			IB_USER_VERBS_CMD_REG_MR,
3868 			ib_uverbs_reg_mr,
3869 			UAPI_DEF_WRITE_UDATA_IO(struct ib_uverbs_reg_mr,
3870 						struct ib_uverbs_reg_mr_resp),
3871 			UAPI_DEF_METHOD_NEEDS_FN(reg_user_mr)),
3872 		DECLARE_UVERBS_WRITE(
3873 			IB_USER_VERBS_CMD_REREG_MR,
3874 			ib_uverbs_rereg_mr,
3875 			UAPI_DEF_WRITE_UDATA_IO(struct ib_uverbs_rereg_mr,
3876 						struct ib_uverbs_rereg_mr_resp),
3877 			UAPI_DEF_METHOD_NEEDS_FN(rereg_user_mr))),
3878 
3879 	DECLARE_UVERBS_OBJECT(
3880 		UVERBS_OBJECT_MW,
3881 		DECLARE_UVERBS_WRITE(
3882 			IB_USER_VERBS_CMD_ALLOC_MW,
3883 			ib_uverbs_alloc_mw,
3884 			UAPI_DEF_WRITE_UDATA_IO(struct ib_uverbs_alloc_mw,
3885 						struct ib_uverbs_alloc_mw_resp),
3886 			UAPI_DEF_METHOD_NEEDS_FN(alloc_mw)),
3887 		DECLARE_UVERBS_WRITE(
3888 			IB_USER_VERBS_CMD_DEALLOC_MW,
3889 			ib_uverbs_dealloc_mw,
3890 			UAPI_DEF_WRITE_I(struct ib_uverbs_dealloc_mw),
3891 			UAPI_DEF_METHOD_NEEDS_FN(dealloc_mw))),
3892 
3893 	DECLARE_UVERBS_OBJECT(
3894 		UVERBS_OBJECT_PD,
3895 		DECLARE_UVERBS_WRITE(
3896 			IB_USER_VERBS_CMD_ALLOC_PD,
3897 			ib_uverbs_alloc_pd,
3898 			UAPI_DEF_WRITE_UDATA_IO(struct ib_uverbs_alloc_pd,
3899 						struct ib_uverbs_alloc_pd_resp),
3900 			UAPI_DEF_METHOD_NEEDS_FN(alloc_pd)),
3901 		DECLARE_UVERBS_WRITE(
3902 			IB_USER_VERBS_CMD_DEALLOC_PD,
3903 			ib_uverbs_dealloc_pd,
3904 			UAPI_DEF_WRITE_I(struct ib_uverbs_dealloc_pd),
3905 			UAPI_DEF_METHOD_NEEDS_FN(dealloc_pd))),
3906 
3907 	DECLARE_UVERBS_OBJECT(
3908 		UVERBS_OBJECT_QP,
3909 		DECLARE_UVERBS_WRITE(
3910 			IB_USER_VERBS_CMD_ATTACH_MCAST,
3911 			ib_uverbs_attach_mcast,
3912 			UAPI_DEF_WRITE_I(struct ib_uverbs_attach_mcast),
3913 			UAPI_DEF_METHOD_NEEDS_FN(attach_mcast),
3914 			UAPI_DEF_METHOD_NEEDS_FN(detach_mcast)),
3915 		DECLARE_UVERBS_WRITE(IB_USER_VERBS_CMD_CREATE_QP,
3916 				     ib_uverbs_create_qp,
3917 				     UAPI_DEF_WRITE_UDATA_IO(
3918 					     struct ib_uverbs_create_qp,
3919 					     struct ib_uverbs_create_qp_resp),
3920 				     UAPI_DEF_METHOD_NEEDS_FN(create_qp)),
3921 		DECLARE_UVERBS_WRITE(
3922 			IB_USER_VERBS_CMD_DESTROY_QP,
3923 			ib_uverbs_destroy_qp,
3924 			UAPI_DEF_WRITE_IO(struct ib_uverbs_destroy_qp,
3925 					  struct ib_uverbs_destroy_qp_resp),
3926 			UAPI_DEF_METHOD_NEEDS_FN(destroy_qp)),
3927 		DECLARE_UVERBS_WRITE(
3928 			IB_USER_VERBS_CMD_DETACH_MCAST,
3929 			ib_uverbs_detach_mcast,
3930 			UAPI_DEF_WRITE_I(struct ib_uverbs_detach_mcast),
3931 			UAPI_DEF_METHOD_NEEDS_FN(detach_mcast)),
3932 		DECLARE_UVERBS_WRITE(
3933 			IB_USER_VERBS_CMD_MODIFY_QP,
3934 			ib_uverbs_modify_qp,
3935 			UAPI_DEF_WRITE_I(struct ib_uverbs_modify_qp),
3936 			UAPI_DEF_METHOD_NEEDS_FN(modify_qp)),
3937 		DECLARE_UVERBS_WRITE(
3938 			IB_USER_VERBS_CMD_POST_RECV,
3939 			ib_uverbs_post_recv,
3940 			UAPI_DEF_WRITE_IO(struct ib_uverbs_post_recv,
3941 					  struct ib_uverbs_post_recv_resp),
3942 			UAPI_DEF_METHOD_NEEDS_FN(post_recv)),
3943 		DECLARE_UVERBS_WRITE(
3944 			IB_USER_VERBS_CMD_POST_SEND,
3945 			ib_uverbs_post_send,
3946 			UAPI_DEF_WRITE_IO(struct ib_uverbs_post_send,
3947 					  struct ib_uverbs_post_send_resp),
3948 			UAPI_DEF_METHOD_NEEDS_FN(post_send)),
3949 		DECLARE_UVERBS_WRITE(
3950 			IB_USER_VERBS_CMD_QUERY_QP,
3951 			ib_uverbs_query_qp,
3952 			UAPI_DEF_WRITE_IO(struct ib_uverbs_query_qp,
3953 					  struct ib_uverbs_query_qp_resp),
3954 			UAPI_DEF_METHOD_NEEDS_FN(query_qp)),
3955 		DECLARE_UVERBS_WRITE_EX(
3956 			IB_USER_VERBS_EX_CMD_CREATE_QP,
3957 			ib_uverbs_ex_create_qp,
3958 			UAPI_DEF_WRITE_IO_EX(struct ib_uverbs_ex_create_qp,
3959 					     comp_mask,
3960 					     struct ib_uverbs_ex_create_qp_resp,
3961 					     response_length),
3962 			UAPI_DEF_METHOD_NEEDS_FN(create_qp)),
3963 		DECLARE_UVERBS_WRITE_EX(
3964 			IB_USER_VERBS_EX_CMD_MODIFY_QP,
3965 			ib_uverbs_ex_modify_qp,
3966 			UAPI_DEF_WRITE_IO_EX(struct ib_uverbs_ex_modify_qp,
3967 					     base,
3968 					     struct ib_uverbs_ex_modify_qp_resp,
3969 					     response_length),
3970 			UAPI_DEF_METHOD_NEEDS_FN(modify_qp))),
3971 
3972 	DECLARE_UVERBS_OBJECT(
3973 		UVERBS_OBJECT_RWQ_IND_TBL,
3974 		DECLARE_UVERBS_WRITE_EX(
3975 			IB_USER_VERBS_EX_CMD_CREATE_RWQ_IND_TBL,
3976 			ib_uverbs_ex_create_rwq_ind_table,
3977 			UAPI_DEF_WRITE_IO_EX(
3978 				struct ib_uverbs_ex_create_rwq_ind_table,
3979 				log_ind_tbl_size,
3980 				struct ib_uverbs_ex_create_rwq_ind_table_resp,
3981 				ind_tbl_num),
3982 			UAPI_DEF_METHOD_NEEDS_FN(create_rwq_ind_table)),
3983 		DECLARE_UVERBS_WRITE_EX(
3984 			IB_USER_VERBS_EX_CMD_DESTROY_RWQ_IND_TBL,
3985 			ib_uverbs_ex_destroy_rwq_ind_table,
3986 			UAPI_DEF_WRITE_I(
3987 				struct ib_uverbs_ex_destroy_rwq_ind_table),
3988 			UAPI_DEF_METHOD_NEEDS_FN(destroy_rwq_ind_table))),
3989 
3990 	DECLARE_UVERBS_OBJECT(
3991 		UVERBS_OBJECT_WQ,
3992 		DECLARE_UVERBS_WRITE_EX(
3993 			IB_USER_VERBS_EX_CMD_CREATE_WQ,
3994 			ib_uverbs_ex_create_wq,
3995 			UAPI_DEF_WRITE_IO_EX(struct ib_uverbs_ex_create_wq,
3996 					     max_sge,
3997 					     struct ib_uverbs_ex_create_wq_resp,
3998 					     wqn),
3999 			UAPI_DEF_METHOD_NEEDS_FN(create_wq)),
4000 		DECLARE_UVERBS_WRITE_EX(
4001 			IB_USER_VERBS_EX_CMD_DESTROY_WQ,
4002 			ib_uverbs_ex_destroy_wq,
4003 			UAPI_DEF_WRITE_IO_EX(struct ib_uverbs_ex_destroy_wq,
4004 					     wq_handle,
4005 					     struct ib_uverbs_ex_destroy_wq_resp,
4006 					     reserved),
4007 			UAPI_DEF_METHOD_NEEDS_FN(destroy_wq)),
4008 		DECLARE_UVERBS_WRITE_EX(
4009 			IB_USER_VERBS_EX_CMD_MODIFY_WQ,
4010 			ib_uverbs_ex_modify_wq,
4011 			UAPI_DEF_WRITE_I_EX(struct ib_uverbs_ex_modify_wq,
4012 					    curr_wq_state),
4013 			UAPI_DEF_METHOD_NEEDS_FN(modify_wq))),
4014 
4015 	DECLARE_UVERBS_OBJECT(
4016 		UVERBS_OBJECT_SRQ,
4017 		DECLARE_UVERBS_WRITE(IB_USER_VERBS_CMD_CREATE_SRQ,
4018 				     ib_uverbs_create_srq,
4019 				     UAPI_DEF_WRITE_UDATA_IO(
4020 					     struct ib_uverbs_create_srq,
4021 					     struct ib_uverbs_create_srq_resp),
4022 				     UAPI_DEF_METHOD_NEEDS_FN(create_srq)),
4023 		DECLARE_UVERBS_WRITE(IB_USER_VERBS_CMD_CREATE_XSRQ,
4024 				     ib_uverbs_create_xsrq,
4025 				     UAPI_DEF_WRITE_UDATA_IO(
4026 					     struct ib_uverbs_create_xsrq,
4027 					     struct ib_uverbs_create_srq_resp),
4028 				     UAPI_DEF_METHOD_NEEDS_FN(create_srq)),
4029 		DECLARE_UVERBS_WRITE(
4030 			IB_USER_VERBS_CMD_DESTROY_SRQ,
4031 			ib_uverbs_destroy_srq,
4032 			UAPI_DEF_WRITE_IO(struct ib_uverbs_destroy_srq,
4033 					  struct ib_uverbs_destroy_srq_resp),
4034 			UAPI_DEF_METHOD_NEEDS_FN(destroy_srq)),
4035 		DECLARE_UVERBS_WRITE(
4036 			IB_USER_VERBS_CMD_MODIFY_SRQ,
4037 			ib_uverbs_modify_srq,
4038 			UAPI_DEF_WRITE_UDATA_I(struct ib_uverbs_modify_srq),
4039 			UAPI_DEF_METHOD_NEEDS_FN(modify_srq)),
4040 		DECLARE_UVERBS_WRITE(
4041 			IB_USER_VERBS_CMD_POST_SRQ_RECV,
4042 			ib_uverbs_post_srq_recv,
4043 			UAPI_DEF_WRITE_IO(struct ib_uverbs_post_srq_recv,
4044 					  struct ib_uverbs_post_srq_recv_resp),
4045 			UAPI_DEF_METHOD_NEEDS_FN(post_srq_recv)),
4046 		DECLARE_UVERBS_WRITE(
4047 			IB_USER_VERBS_CMD_QUERY_SRQ,
4048 			ib_uverbs_query_srq,
4049 			UAPI_DEF_WRITE_IO(struct ib_uverbs_query_srq,
4050 					  struct ib_uverbs_query_srq_resp),
4051 			UAPI_DEF_METHOD_NEEDS_FN(query_srq))),
4052 
4053 	DECLARE_UVERBS_OBJECT(
4054 		UVERBS_OBJECT_XRCD,
4055 		DECLARE_UVERBS_WRITE(
4056 			IB_USER_VERBS_CMD_CLOSE_XRCD,
4057 			ib_uverbs_close_xrcd,
4058 			UAPI_DEF_WRITE_I(struct ib_uverbs_close_xrcd)),
4059 		DECLARE_UVERBS_WRITE(IB_USER_VERBS_CMD_OPEN_QP,
4060 				     ib_uverbs_open_qp,
4061 				     UAPI_DEF_WRITE_UDATA_IO(
4062 					     struct ib_uverbs_open_qp,
4063 					     struct ib_uverbs_create_qp_resp)),
4064 		DECLARE_UVERBS_WRITE(IB_USER_VERBS_CMD_OPEN_XRCD,
4065 				     ib_uverbs_open_xrcd,
4066 				     UAPI_DEF_WRITE_UDATA_IO(
4067 					     struct ib_uverbs_open_xrcd,
4068 					     struct ib_uverbs_open_xrcd_resp)),
4069 		UAPI_DEF_OBJ_NEEDS_FN(alloc_xrcd),
4070 		UAPI_DEF_OBJ_NEEDS_FN(dealloc_xrcd)),
4071 
4072 	{},
4073 };
4074