Merge tag 'for-linus-unmerged' of git://git.kernel.org/pub/scm/linux/kernel/git/rdma...
[muen/linux.git] / drivers / infiniband / core / uverbs_cmd.c
1 /*
2  * Copyright (c) 2005 Topspin Communications.  All rights reserved.
3  * Copyright (c) 2005, 2006, 2007 Cisco Systems.  All rights reserved.
4  * Copyright (c) 2005 PathScale, Inc.  All rights reserved.
5  * Copyright (c) 2006 Mellanox Technologies.  All rights reserved.
6  *
7  * This software is available to you under a choice of one of two
8  * licenses.  You may choose to be licensed under the terms of the GNU
9  * General Public License (GPL) Version 2, available from the file
10  * COPYING in the main directory of this source tree, or the
11  * OpenIB.org BSD license below:
12  *
13  *     Redistribution and use in source and binary forms, with or
14  *     without modification, are permitted provided that the following
15  *     conditions are met:
16  *
17  *      - Redistributions of source code must retain the above
18  *        copyright notice, this list of conditions and the following
19  *        disclaimer.
20  *
21  *      - Redistributions in binary form must reproduce the above
22  *        copyright notice, this list of conditions and the following
23  *        disclaimer in the documentation and/or other materials
24  *        provided with the distribution.
25  *
26  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
27  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
28  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
29  * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
30  * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
31  * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
32  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
33  * SOFTWARE.
34  */
35
36 #include <linux/file.h>
37 #include <linux/fs.h>
38 #include <linux/slab.h>
39 #include <linux/sched.h>
40
41 #include <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 static struct ib_uverbs_completion_event_file *
51 ib_uverbs_lookup_comp_file(int fd, struct ib_ucontext *context)
52 {
53         struct ib_uobject *uobj = uobj_get_read(UVERBS_OBJECT_COMP_CHANNEL,
54                                                 fd, context);
55         struct ib_uobject_file *uobj_file;
56
57         if (IS_ERR(uobj))
58                 return (void *)uobj;
59
60         uverbs_uobject_get(uobj);
61         uobj_put_read(uobj);
62
63         uobj_file = container_of(uobj, struct ib_uobject_file, uobj);
64         return container_of(uobj_file, struct ib_uverbs_completion_event_file,
65                             uobj_file);
66 }
67
68 ssize_t ib_uverbs_get_context(struct ib_uverbs_file *file,
69                               struct ib_device *ib_dev,
70                               const char __user *buf,
71                               int in_len, int out_len)
72 {
73         struct ib_uverbs_get_context      cmd;
74         struct ib_uverbs_get_context_resp resp;
75         struct ib_udata                   udata;
76         struct ib_ucontext               *ucontext;
77         struct file                      *filp;
78         struct ib_rdmacg_object          cg_obj;
79         int ret;
80
81         if (out_len < sizeof resp)
82                 return -ENOSPC;
83
84         if (copy_from_user(&cmd, buf, sizeof cmd))
85                 return -EFAULT;
86
87         mutex_lock(&file->mutex);
88
89         if (file->ucontext) {
90                 ret = -EINVAL;
91                 goto err;
92         }
93
94         ib_uverbs_init_udata(&udata, buf + sizeof(cmd),
95                    u64_to_user_ptr(cmd.response) + sizeof(resp),
96                    in_len - sizeof(cmd) - sizeof(struct ib_uverbs_cmd_hdr),
97                    out_len - sizeof(resp));
98
99         ret = ib_rdmacg_try_charge(&cg_obj, ib_dev, RDMACG_RESOURCE_HCA_HANDLE);
100         if (ret)
101                 goto err;
102
103         ucontext = ib_dev->alloc_ucontext(ib_dev, &udata);
104         if (IS_ERR(ucontext)) {
105                 ret = PTR_ERR(ucontext);
106                 goto err_alloc;
107         }
108
109         ucontext->device = ib_dev;
110         ucontext->cg_obj = cg_obj;
111         /* ufile is required when some objects are released */
112         ucontext->ufile = file;
113         uverbs_initialize_ucontext(ucontext);
114
115         rcu_read_lock();
116         ucontext->tgid = get_task_pid(current->group_leader, PIDTYPE_PID);
117         rcu_read_unlock();
118         ucontext->closing = 0;
119
120 #ifdef CONFIG_INFINIBAND_ON_DEMAND_PAGING
121         ucontext->umem_tree = RB_ROOT_CACHED;
122         init_rwsem(&ucontext->umem_rwsem);
123         ucontext->odp_mrs_count = 0;
124         INIT_LIST_HEAD(&ucontext->no_private_counters);
125
126         if (!(ib_dev->attrs.device_cap_flags & IB_DEVICE_ON_DEMAND_PAGING))
127                 ucontext->invalidate_range = NULL;
128
129 #endif
130
131         resp.num_comp_vectors = file->device->num_comp_vectors;
132
133         ret = get_unused_fd_flags(O_CLOEXEC);
134         if (ret < 0)
135                 goto err_free;
136         resp.async_fd = ret;
137
138         filp = ib_uverbs_alloc_async_event_file(file, ib_dev);
139         if (IS_ERR(filp)) {
140                 ret = PTR_ERR(filp);
141                 goto err_fd;
142         }
143
144         if (copy_to_user(u64_to_user_ptr(cmd.response), &resp, sizeof resp)) {
145                 ret = -EFAULT;
146                 goto err_file;
147         }
148
149         file->ucontext = ucontext;
150
151         fd_install(resp.async_fd, filp);
152
153         mutex_unlock(&file->mutex);
154
155         return in_len;
156
157 err_file:
158         ib_uverbs_free_async_event_file(file);
159         fput(filp);
160
161 err_fd:
162         put_unused_fd(resp.async_fd);
163
164 err_free:
165         put_pid(ucontext->tgid);
166         ib_dev->dealloc_ucontext(ucontext);
167
168 err_alloc:
169         ib_rdmacg_uncharge(&cg_obj, ib_dev, RDMACG_RESOURCE_HCA_HANDLE);
170
171 err:
172         mutex_unlock(&file->mutex);
173         return ret;
174 }
175
176 static void copy_query_dev_fields(struct ib_uverbs_file *file,
177                                   struct ib_device *ib_dev,
178                                   struct ib_uverbs_query_device_resp *resp,
179                                   struct ib_device_attr *attr)
180 {
181         resp->fw_ver            = attr->fw_ver;
182         resp->node_guid         = ib_dev->node_guid;
183         resp->sys_image_guid    = attr->sys_image_guid;
184         resp->max_mr_size       = attr->max_mr_size;
185         resp->page_size_cap     = attr->page_size_cap;
186         resp->vendor_id         = attr->vendor_id;
187         resp->vendor_part_id    = attr->vendor_part_id;
188         resp->hw_ver            = attr->hw_ver;
189         resp->max_qp            = attr->max_qp;
190         resp->max_qp_wr         = attr->max_qp_wr;
191         resp->device_cap_flags  = lower_32_bits(attr->device_cap_flags);
192         resp->max_sge           = attr->max_sge;
193         resp->max_sge_rd        = attr->max_sge_rd;
194         resp->max_cq            = attr->max_cq;
195         resp->max_cqe           = attr->max_cqe;
196         resp->max_mr            = attr->max_mr;
197         resp->max_pd            = attr->max_pd;
198         resp->max_qp_rd_atom    = attr->max_qp_rd_atom;
199         resp->max_ee_rd_atom    = attr->max_ee_rd_atom;
200         resp->max_res_rd_atom   = attr->max_res_rd_atom;
201         resp->max_qp_init_rd_atom       = attr->max_qp_init_rd_atom;
202         resp->max_ee_init_rd_atom       = attr->max_ee_init_rd_atom;
203         resp->atomic_cap                = attr->atomic_cap;
204         resp->max_ee                    = attr->max_ee;
205         resp->max_rdd                   = attr->max_rdd;
206         resp->max_mw                    = attr->max_mw;
207         resp->max_raw_ipv6_qp           = attr->max_raw_ipv6_qp;
208         resp->max_raw_ethy_qp           = attr->max_raw_ethy_qp;
209         resp->max_mcast_grp             = attr->max_mcast_grp;
210         resp->max_mcast_qp_attach       = attr->max_mcast_qp_attach;
211         resp->max_total_mcast_qp_attach = attr->max_total_mcast_qp_attach;
212         resp->max_ah                    = attr->max_ah;
213         resp->max_fmr                   = attr->max_fmr;
214         resp->max_map_per_fmr           = attr->max_map_per_fmr;
215         resp->max_srq                   = attr->max_srq;
216         resp->max_srq_wr                = attr->max_srq_wr;
217         resp->max_srq_sge               = attr->max_srq_sge;
218         resp->max_pkeys                 = attr->max_pkeys;
219         resp->local_ca_ack_delay        = attr->local_ca_ack_delay;
220         resp->phys_port_cnt             = ib_dev->phys_port_cnt;
221 }
222
223 ssize_t ib_uverbs_query_device(struct ib_uverbs_file *file,
224                                struct ib_device *ib_dev,
225                                const char __user *buf,
226                                int in_len, int out_len)
227 {
228         struct ib_uverbs_query_device      cmd;
229         struct ib_uverbs_query_device_resp resp;
230
231         if (out_len < sizeof resp)
232                 return -ENOSPC;
233
234         if (copy_from_user(&cmd, buf, sizeof cmd))
235                 return -EFAULT;
236
237         memset(&resp, 0, sizeof resp);
238         copy_query_dev_fields(file, ib_dev, &resp, &ib_dev->attrs);
239
240         if (copy_to_user(u64_to_user_ptr(cmd.response), &resp, sizeof resp))
241                 return -EFAULT;
242
243         return in_len;
244 }
245
246 ssize_t ib_uverbs_query_port(struct ib_uverbs_file *file,
247                              struct ib_device *ib_dev,
248                              const char __user *buf,
249                              int in_len, int out_len)
250 {
251         struct ib_uverbs_query_port      cmd;
252         struct ib_uverbs_query_port_resp resp;
253         struct ib_port_attr              attr;
254         int                              ret;
255
256         if (out_len < sizeof resp)
257                 return -ENOSPC;
258
259         if (copy_from_user(&cmd, buf, sizeof cmd))
260                 return -EFAULT;
261
262         ret = ib_query_port(ib_dev, cmd.port_num, &attr);
263         if (ret)
264                 return ret;
265
266         memset(&resp, 0, sizeof resp);
267
268         resp.state           = attr.state;
269         resp.max_mtu         = attr.max_mtu;
270         resp.active_mtu      = attr.active_mtu;
271         resp.gid_tbl_len     = attr.gid_tbl_len;
272         resp.port_cap_flags  = attr.port_cap_flags;
273         resp.max_msg_sz      = attr.max_msg_sz;
274         resp.bad_pkey_cntr   = attr.bad_pkey_cntr;
275         resp.qkey_viol_cntr  = attr.qkey_viol_cntr;
276         resp.pkey_tbl_len    = attr.pkey_tbl_len;
277
278         if (rdma_cap_opa_ah(ib_dev, cmd.port_num)) {
279                 resp.lid     = OPA_TO_IB_UCAST_LID(attr.lid);
280                 resp.sm_lid  = OPA_TO_IB_UCAST_LID(attr.sm_lid);
281         } else {
282                 resp.lid     = ib_lid_cpu16(attr.lid);
283                 resp.sm_lid  = ib_lid_cpu16(attr.sm_lid);
284         }
285         resp.lmc             = attr.lmc;
286         resp.max_vl_num      = attr.max_vl_num;
287         resp.sm_sl           = attr.sm_sl;
288         resp.subnet_timeout  = attr.subnet_timeout;
289         resp.init_type_reply = attr.init_type_reply;
290         resp.active_width    = attr.active_width;
291         resp.active_speed    = attr.active_speed;
292         resp.phys_state      = attr.phys_state;
293         resp.link_layer      = rdma_port_get_link_layer(ib_dev,
294                                                         cmd.port_num);
295
296         if (copy_to_user(u64_to_user_ptr(cmd.response), &resp, sizeof resp))
297                 return -EFAULT;
298
299         return in_len;
300 }
301
302 ssize_t ib_uverbs_alloc_pd(struct ib_uverbs_file *file,
303                            struct ib_device *ib_dev,
304                            const char __user *buf,
305                            int in_len, int out_len)
306 {
307         struct ib_uverbs_alloc_pd      cmd;
308         struct ib_uverbs_alloc_pd_resp resp;
309         struct ib_udata                udata;
310         struct ib_uobject             *uobj;
311         struct ib_pd                  *pd;
312         int                            ret;
313
314         if (out_len < sizeof resp)
315                 return -ENOSPC;
316
317         if (copy_from_user(&cmd, buf, sizeof cmd))
318                 return -EFAULT;
319
320         ib_uverbs_init_udata(&udata, buf + sizeof(cmd),
321                    u64_to_user_ptr(cmd.response) + sizeof(resp),
322                    in_len - sizeof(cmd) - sizeof(struct ib_uverbs_cmd_hdr),
323                    out_len - sizeof(resp));
324
325         uobj  = uobj_alloc(UVERBS_OBJECT_PD, file->ucontext);
326         if (IS_ERR(uobj))
327                 return PTR_ERR(uobj);
328
329         pd = ib_dev->alloc_pd(ib_dev, file->ucontext, &udata);
330         if (IS_ERR(pd)) {
331                 ret = PTR_ERR(pd);
332                 goto err;
333         }
334
335         pd->device  = ib_dev;
336         pd->uobject = uobj;
337         pd->__internal_mr = NULL;
338         atomic_set(&pd->usecnt, 0);
339
340         uobj->object = pd;
341         memset(&resp, 0, sizeof resp);
342         resp.pd_handle = uobj->id;
343         pd->res.type = RDMA_RESTRACK_PD;
344         rdma_restrack_add(&pd->res);
345
346         if (copy_to_user(u64_to_user_ptr(cmd.response), &resp, sizeof resp)) {
347                 ret = -EFAULT;
348                 goto err_copy;
349         }
350
351         uobj_alloc_commit(uobj);
352
353         return in_len;
354
355 err_copy:
356         ib_dealloc_pd(pd);
357
358 err:
359         uobj_alloc_abort(uobj);
360         return ret;
361 }
362
363 ssize_t ib_uverbs_dealloc_pd(struct ib_uverbs_file *file,
364                              struct ib_device *ib_dev,
365                              const char __user *buf,
366                              int in_len, int out_len)
367 {
368         struct ib_uverbs_dealloc_pd cmd;
369         struct ib_uobject          *uobj;
370         int                         ret;
371
372         if (copy_from_user(&cmd, buf, sizeof cmd))
373                 return -EFAULT;
374
375         uobj  = uobj_get_write(UVERBS_OBJECT_PD, cmd.pd_handle,
376                                file->ucontext);
377         if (IS_ERR(uobj))
378                 return PTR_ERR(uobj);
379
380         ret = uobj_remove_commit(uobj);
381
382         return ret ?: in_len;
383 }
384
385 struct xrcd_table_entry {
386         struct rb_node  node;
387         struct ib_xrcd *xrcd;
388         struct inode   *inode;
389 };
390
391 static int xrcd_table_insert(struct ib_uverbs_device *dev,
392                             struct inode *inode,
393                             struct ib_xrcd *xrcd)
394 {
395         struct xrcd_table_entry *entry, *scan;
396         struct rb_node **p = &dev->xrcd_tree.rb_node;
397         struct rb_node *parent = NULL;
398
399         entry = kmalloc(sizeof *entry, GFP_KERNEL);
400         if (!entry)
401                 return -ENOMEM;
402
403         entry->xrcd  = xrcd;
404         entry->inode = inode;
405
406         while (*p) {
407                 parent = *p;
408                 scan = rb_entry(parent, struct xrcd_table_entry, node);
409
410                 if (inode < scan->inode) {
411                         p = &(*p)->rb_left;
412                 } else if (inode > scan->inode) {
413                         p = &(*p)->rb_right;
414                 } else {
415                         kfree(entry);
416                         return -EEXIST;
417                 }
418         }
419
420         rb_link_node(&entry->node, parent, p);
421         rb_insert_color(&entry->node, &dev->xrcd_tree);
422         igrab(inode);
423         return 0;
424 }
425
426 static struct xrcd_table_entry *xrcd_table_search(struct ib_uverbs_device *dev,
427                                                   struct inode *inode)
428 {
429         struct xrcd_table_entry *entry;
430         struct rb_node *p = dev->xrcd_tree.rb_node;
431
432         while (p) {
433                 entry = rb_entry(p, struct xrcd_table_entry, node);
434
435                 if (inode < entry->inode)
436                         p = p->rb_left;
437                 else if (inode > entry->inode)
438                         p = p->rb_right;
439                 else
440                         return entry;
441         }
442
443         return NULL;
444 }
445
446 static struct ib_xrcd *find_xrcd(struct ib_uverbs_device *dev, struct inode *inode)
447 {
448         struct xrcd_table_entry *entry;
449
450         entry = xrcd_table_search(dev, inode);
451         if (!entry)
452                 return NULL;
453
454         return entry->xrcd;
455 }
456
457 static void xrcd_table_delete(struct ib_uverbs_device *dev,
458                               struct inode *inode)
459 {
460         struct xrcd_table_entry *entry;
461
462         entry = xrcd_table_search(dev, inode);
463         if (entry) {
464                 iput(inode);
465                 rb_erase(&entry->node, &dev->xrcd_tree);
466                 kfree(entry);
467         }
468 }
469
470 ssize_t ib_uverbs_open_xrcd(struct ib_uverbs_file *file,
471                             struct ib_device *ib_dev,
472                             const char __user *buf, int in_len,
473                             int out_len)
474 {
475         struct ib_uverbs_open_xrcd      cmd;
476         struct ib_uverbs_open_xrcd_resp resp;
477         struct ib_udata                 udata;
478         struct ib_uxrcd_object         *obj;
479         struct ib_xrcd                 *xrcd = NULL;
480         struct fd                       f = {NULL, 0};
481         struct inode                   *inode = NULL;
482         int                             ret = 0;
483         int                             new_xrcd = 0;
484
485         if (out_len < sizeof resp)
486                 return -ENOSPC;
487
488         if (copy_from_user(&cmd, buf, sizeof cmd))
489                 return -EFAULT;
490
491         ib_uverbs_init_udata(&udata, buf + sizeof(cmd),
492                    u64_to_user_ptr(cmd.response) + sizeof(resp),
493                    in_len - sizeof(cmd) - sizeof(struct ib_uverbs_cmd_hdr),
494                    out_len - sizeof(resp));
495
496         mutex_lock(&file->device->xrcd_tree_mutex);
497
498         if (cmd.fd != -1) {
499                 /* search for file descriptor */
500                 f = fdget(cmd.fd);
501                 if (!f.file) {
502                         ret = -EBADF;
503                         goto err_tree_mutex_unlock;
504                 }
505
506                 inode = file_inode(f.file);
507                 xrcd = find_xrcd(file->device, inode);
508                 if (!xrcd && !(cmd.oflags & O_CREAT)) {
509                         /* no file descriptor. Need CREATE flag */
510                         ret = -EAGAIN;
511                         goto err_tree_mutex_unlock;
512                 }
513
514                 if (xrcd && cmd.oflags & O_EXCL) {
515                         ret = -EINVAL;
516                         goto err_tree_mutex_unlock;
517                 }
518         }
519
520         obj  = (struct ib_uxrcd_object *)uobj_alloc(UVERBS_OBJECT_XRCD,
521                                                     file->ucontext);
522         if (IS_ERR(obj)) {
523                 ret = PTR_ERR(obj);
524                 goto err_tree_mutex_unlock;
525         }
526
527         if (!xrcd) {
528                 xrcd = ib_dev->alloc_xrcd(ib_dev, file->ucontext, &udata);
529                 if (IS_ERR(xrcd)) {
530                         ret = PTR_ERR(xrcd);
531                         goto err;
532                 }
533
534                 xrcd->inode   = inode;
535                 xrcd->device  = ib_dev;
536                 atomic_set(&xrcd->usecnt, 0);
537                 mutex_init(&xrcd->tgt_qp_mutex);
538                 INIT_LIST_HEAD(&xrcd->tgt_qp_list);
539                 new_xrcd = 1;
540         }
541
542         atomic_set(&obj->refcnt, 0);
543         obj->uobject.object = xrcd;
544         memset(&resp, 0, sizeof resp);
545         resp.xrcd_handle = obj->uobject.id;
546
547         if (inode) {
548                 if (new_xrcd) {
549                         /* create new inode/xrcd table entry */
550                         ret = xrcd_table_insert(file->device, inode, xrcd);
551                         if (ret)
552                                 goto err_dealloc_xrcd;
553                 }
554                 atomic_inc(&xrcd->usecnt);
555         }
556
557         if (copy_to_user(u64_to_user_ptr(cmd.response), &resp, sizeof resp)) {
558                 ret = -EFAULT;
559                 goto err_copy;
560         }
561
562         if (f.file)
563                 fdput(f);
564
565         mutex_unlock(&file->device->xrcd_tree_mutex);
566
567         uobj_alloc_commit(&obj->uobject);
568
569         return in_len;
570
571 err_copy:
572         if (inode) {
573                 if (new_xrcd)
574                         xrcd_table_delete(file->device, inode);
575                 atomic_dec(&xrcd->usecnt);
576         }
577
578 err_dealloc_xrcd:
579         ib_dealloc_xrcd(xrcd);
580
581 err:
582         uobj_alloc_abort(&obj->uobject);
583
584 err_tree_mutex_unlock:
585         if (f.file)
586                 fdput(f);
587
588         mutex_unlock(&file->device->xrcd_tree_mutex);
589
590         return ret;
591 }
592
593 ssize_t ib_uverbs_close_xrcd(struct ib_uverbs_file *file,
594                              struct ib_device *ib_dev,
595                              const char __user *buf, int in_len,
596                              int out_len)
597 {
598         struct ib_uverbs_close_xrcd cmd;
599         struct ib_uobject           *uobj;
600         int                         ret = 0;
601
602         if (copy_from_user(&cmd, buf, sizeof cmd))
603                 return -EFAULT;
604
605         uobj  = uobj_get_write(UVERBS_OBJECT_XRCD, cmd.xrcd_handle,
606                                file->ucontext);
607         if (IS_ERR(uobj))
608                 return PTR_ERR(uobj);
609
610         ret = uobj_remove_commit(uobj);
611         return ret ?: in_len;
612 }
613
614 int ib_uverbs_dealloc_xrcd(struct ib_uverbs_device *dev,
615                            struct ib_xrcd *xrcd,
616                            enum rdma_remove_reason why)
617 {
618         struct inode *inode;
619         int ret;
620
621         inode = xrcd->inode;
622         if (inode && !atomic_dec_and_test(&xrcd->usecnt))
623                 return 0;
624
625         ret = ib_dealloc_xrcd(xrcd);
626
627         if (why == RDMA_REMOVE_DESTROY && ret)
628                 atomic_inc(&xrcd->usecnt);
629         else if (inode)
630                 xrcd_table_delete(dev, inode);
631
632         return ret;
633 }
634
635 ssize_t ib_uverbs_reg_mr(struct ib_uverbs_file *file,
636                          struct ib_device *ib_dev,
637                          const char __user *buf, int in_len,
638                          int out_len)
639 {
640         struct ib_uverbs_reg_mr      cmd;
641         struct ib_uverbs_reg_mr_resp resp;
642         struct ib_udata              udata;
643         struct ib_uobject           *uobj;
644         struct ib_pd                *pd;
645         struct ib_mr                *mr;
646         int                          ret;
647
648         if (out_len < sizeof resp)
649                 return -ENOSPC;
650
651         if (copy_from_user(&cmd, buf, sizeof cmd))
652                 return -EFAULT;
653
654         ib_uverbs_init_udata(&udata, buf + sizeof(cmd),
655                    u64_to_user_ptr(cmd.response) + sizeof(resp),
656                    in_len - sizeof(cmd) - sizeof(struct ib_uverbs_cmd_hdr),
657                    out_len - sizeof(resp));
658
659         if ((cmd.start & ~PAGE_MASK) != (cmd.hca_va & ~PAGE_MASK))
660                 return -EINVAL;
661
662         ret = ib_check_mr_access(cmd.access_flags);
663         if (ret)
664                 return ret;
665
666         uobj  = uobj_alloc(UVERBS_OBJECT_MR, file->ucontext);
667         if (IS_ERR(uobj))
668                 return PTR_ERR(uobj);
669
670         pd = uobj_get_obj_read(pd, UVERBS_OBJECT_PD, cmd.pd_handle, file->ucontext);
671         if (!pd) {
672                 ret = -EINVAL;
673                 goto err_free;
674         }
675
676         if (cmd.access_flags & IB_ACCESS_ON_DEMAND) {
677                 if (!(pd->device->attrs.device_cap_flags &
678                       IB_DEVICE_ON_DEMAND_PAGING)) {
679                         pr_debug("ODP support not available\n");
680                         ret = -EINVAL;
681                         goto err_put;
682                 }
683         }
684
685         mr = pd->device->reg_user_mr(pd, cmd.start, cmd.length, cmd.hca_va,
686                                      cmd.access_flags, &udata);
687         if (IS_ERR(mr)) {
688                 ret = PTR_ERR(mr);
689                 goto err_put;
690         }
691
692         mr->device  = pd->device;
693         mr->pd      = pd;
694         mr->uobject = uobj;
695         atomic_inc(&pd->usecnt);
696         mr->res.type = RDMA_RESTRACK_MR;
697         rdma_restrack_add(&mr->res);
698
699         uobj->object = mr;
700
701         memset(&resp, 0, sizeof resp);
702         resp.lkey      = mr->lkey;
703         resp.rkey      = mr->rkey;
704         resp.mr_handle = uobj->id;
705
706         if (copy_to_user(u64_to_user_ptr(cmd.response), &resp, sizeof resp)) {
707                 ret = -EFAULT;
708                 goto err_copy;
709         }
710
711         uobj_put_obj_read(pd);
712
713         uobj_alloc_commit(uobj);
714
715         return in_len;
716
717 err_copy:
718         ib_dereg_mr(mr);
719
720 err_put:
721         uobj_put_obj_read(pd);
722
723 err_free:
724         uobj_alloc_abort(uobj);
725         return ret;
726 }
727
728 ssize_t ib_uverbs_rereg_mr(struct ib_uverbs_file *file,
729                            struct ib_device *ib_dev,
730                            const char __user *buf, int in_len,
731                            int out_len)
732 {
733         struct ib_uverbs_rereg_mr      cmd;
734         struct ib_uverbs_rereg_mr_resp resp;
735         struct ib_udata              udata;
736         struct ib_pd                *pd = NULL;
737         struct ib_mr                *mr;
738         struct ib_pd                *old_pd;
739         int                          ret;
740         struct ib_uobject           *uobj;
741
742         if (out_len < sizeof(resp))
743                 return -ENOSPC;
744
745         if (copy_from_user(&cmd, buf, sizeof(cmd)))
746                 return -EFAULT;
747
748         ib_uverbs_init_udata(&udata, buf + sizeof(cmd),
749                    u64_to_user_ptr(cmd.response) + sizeof(resp),
750                    in_len - sizeof(cmd) - sizeof(struct ib_uverbs_cmd_hdr),
751                    out_len - sizeof(resp));
752
753         if (cmd.flags & ~IB_MR_REREG_SUPPORTED || !cmd.flags)
754                 return -EINVAL;
755
756         if ((cmd.flags & IB_MR_REREG_TRANS) &&
757             (!cmd.start || !cmd.hca_va || 0 >= cmd.length ||
758              (cmd.start & ~PAGE_MASK) != (cmd.hca_va & ~PAGE_MASK)))
759                         return -EINVAL;
760
761         uobj  = uobj_get_write(UVERBS_OBJECT_MR, cmd.mr_handle,
762                                file->ucontext);
763         if (IS_ERR(uobj))
764                 return PTR_ERR(uobj);
765
766         mr = uobj->object;
767
768         if (cmd.flags & IB_MR_REREG_ACCESS) {
769                 ret = ib_check_mr_access(cmd.access_flags);
770                 if (ret)
771                         goto put_uobjs;
772         }
773
774         if (cmd.flags & IB_MR_REREG_PD) {
775                 pd = uobj_get_obj_read(pd, UVERBS_OBJECT_PD, cmd.pd_handle, file->ucontext);
776                 if (!pd) {
777                         ret = -EINVAL;
778                         goto put_uobjs;
779                 }
780         }
781
782         old_pd = mr->pd;
783         ret = mr->device->rereg_user_mr(mr, cmd.flags, cmd.start,
784                                         cmd.length, cmd.hca_va,
785                                         cmd.access_flags, pd, &udata);
786         if (!ret) {
787                 if (cmd.flags & IB_MR_REREG_PD) {
788                         atomic_inc(&pd->usecnt);
789                         mr->pd = pd;
790                         atomic_dec(&old_pd->usecnt);
791                 }
792         } else {
793                 goto put_uobj_pd;
794         }
795
796         memset(&resp, 0, sizeof(resp));
797         resp.lkey      = mr->lkey;
798         resp.rkey      = mr->rkey;
799
800         if (copy_to_user(u64_to_user_ptr(cmd.response), &resp, sizeof(resp)))
801                 ret = -EFAULT;
802         else
803                 ret = in_len;
804
805 put_uobj_pd:
806         if (cmd.flags & IB_MR_REREG_PD)
807                 uobj_put_obj_read(pd);
808
809 put_uobjs:
810         uobj_put_write(uobj);
811
812         return ret;
813 }
814
815 ssize_t ib_uverbs_dereg_mr(struct ib_uverbs_file *file,
816                            struct ib_device *ib_dev,
817                            const char __user *buf, int in_len,
818                            int out_len)
819 {
820         struct ib_uverbs_dereg_mr cmd;
821         struct ib_uobject        *uobj;
822         int                       ret = -EINVAL;
823
824         if (copy_from_user(&cmd, buf, sizeof cmd))
825                 return -EFAULT;
826
827         uobj  = uobj_get_write(UVERBS_OBJECT_MR, cmd.mr_handle,
828                                file->ucontext);
829         if (IS_ERR(uobj))
830                 return PTR_ERR(uobj);
831
832         ret = uobj_remove_commit(uobj);
833
834         return ret ?: in_len;
835 }
836
837 ssize_t ib_uverbs_alloc_mw(struct ib_uverbs_file *file,
838                            struct ib_device *ib_dev,
839                            const char __user *buf, int in_len,
840                            int out_len)
841 {
842         struct ib_uverbs_alloc_mw      cmd;
843         struct ib_uverbs_alloc_mw_resp resp;
844         struct ib_uobject             *uobj;
845         struct ib_pd                  *pd;
846         struct ib_mw                  *mw;
847         struct ib_udata                udata;
848         int                            ret;
849
850         if (out_len < sizeof(resp))
851                 return -ENOSPC;
852
853         if (copy_from_user(&cmd, buf, sizeof(cmd)))
854                 return -EFAULT;
855
856         uobj  = uobj_alloc(UVERBS_OBJECT_MW, file->ucontext);
857         if (IS_ERR(uobj))
858                 return PTR_ERR(uobj);
859
860         pd = uobj_get_obj_read(pd, UVERBS_OBJECT_PD, cmd.pd_handle, file->ucontext);
861         if (!pd) {
862                 ret = -EINVAL;
863                 goto err_free;
864         }
865
866         ib_uverbs_init_udata(&udata, buf + sizeof(cmd),
867                    u64_to_user_ptr(cmd.response) + sizeof(resp),
868                    in_len - sizeof(cmd) - sizeof(struct ib_uverbs_cmd_hdr),
869                    out_len - sizeof(resp));
870
871         mw = pd->device->alloc_mw(pd, cmd.mw_type, &udata);
872         if (IS_ERR(mw)) {
873                 ret = PTR_ERR(mw);
874                 goto err_put;
875         }
876
877         mw->device  = pd->device;
878         mw->pd      = pd;
879         mw->uobject = uobj;
880         atomic_inc(&pd->usecnt);
881
882         uobj->object = mw;
883
884         memset(&resp, 0, sizeof(resp));
885         resp.rkey      = mw->rkey;
886         resp.mw_handle = uobj->id;
887
888         if (copy_to_user(u64_to_user_ptr(cmd.response), &resp, sizeof(resp))) {
889                 ret = -EFAULT;
890                 goto err_copy;
891         }
892
893         uobj_put_obj_read(pd);
894         uobj_alloc_commit(uobj);
895
896         return in_len;
897
898 err_copy:
899         uverbs_dealloc_mw(mw);
900 err_put:
901         uobj_put_obj_read(pd);
902 err_free:
903         uobj_alloc_abort(uobj);
904         return ret;
905 }
906
907 ssize_t ib_uverbs_dealloc_mw(struct ib_uverbs_file *file,
908                              struct ib_device *ib_dev,
909                              const char __user *buf, int in_len,
910                              int out_len)
911 {
912         struct ib_uverbs_dealloc_mw cmd;
913         struct ib_uobject          *uobj;
914         int                         ret = -EINVAL;
915
916         if (copy_from_user(&cmd, buf, sizeof(cmd)))
917                 return -EFAULT;
918
919         uobj  = uobj_get_write(UVERBS_OBJECT_MW, cmd.mw_handle,
920                                file->ucontext);
921         if (IS_ERR(uobj))
922                 return PTR_ERR(uobj);
923
924         ret = uobj_remove_commit(uobj);
925         return ret ?: in_len;
926 }
927
928 ssize_t ib_uverbs_create_comp_channel(struct ib_uverbs_file *file,
929                                       struct ib_device *ib_dev,
930                                       const char __user *buf, int in_len,
931                                       int out_len)
932 {
933         struct ib_uverbs_create_comp_channel       cmd;
934         struct ib_uverbs_create_comp_channel_resp  resp;
935         struct ib_uobject                         *uobj;
936         struct ib_uverbs_completion_event_file    *ev_file;
937
938         if (out_len < sizeof resp)
939                 return -ENOSPC;
940
941         if (copy_from_user(&cmd, buf, sizeof cmd))
942                 return -EFAULT;
943
944         uobj = uobj_alloc(UVERBS_OBJECT_COMP_CHANNEL, file->ucontext);
945         if (IS_ERR(uobj))
946                 return PTR_ERR(uobj);
947
948         resp.fd = uobj->id;
949
950         ev_file = container_of(uobj, struct ib_uverbs_completion_event_file,
951                                uobj_file.uobj);
952         ib_uverbs_init_event_queue(&ev_file->ev_queue);
953
954         if (copy_to_user(u64_to_user_ptr(cmd.response), &resp, sizeof resp)) {
955                 uobj_alloc_abort(uobj);
956                 return -EFAULT;
957         }
958
959         uobj_alloc_commit(uobj);
960         return in_len;
961 }
962
963 static struct ib_ucq_object *create_cq(struct ib_uverbs_file *file,
964                                         struct ib_device *ib_dev,
965                                        struct ib_udata *ucore,
966                                        struct ib_udata *uhw,
967                                        struct ib_uverbs_ex_create_cq *cmd,
968                                        size_t cmd_sz,
969                                        int (*cb)(struct ib_uverbs_file *file,
970                                                  struct ib_ucq_object *obj,
971                                                  struct ib_uverbs_ex_create_cq_resp *resp,
972                                                  struct ib_udata *udata,
973                                                  void *context),
974                                        void *context)
975 {
976         struct ib_ucq_object           *obj;
977         struct ib_uverbs_completion_event_file    *ev_file = NULL;
978         struct ib_cq                   *cq;
979         int                             ret;
980         struct ib_uverbs_ex_create_cq_resp resp;
981         struct ib_cq_init_attr attr = {};
982
983         if (!ib_dev->create_cq)
984                 return ERR_PTR(-EOPNOTSUPP);
985
986         if (cmd->comp_vector >= file->device->num_comp_vectors)
987                 return ERR_PTR(-EINVAL);
988
989         obj  = (struct ib_ucq_object *)uobj_alloc(UVERBS_OBJECT_CQ,
990                                                   file->ucontext);
991         if (IS_ERR(obj))
992                 return obj;
993
994         if (cmd->comp_channel >= 0) {
995                 ev_file = ib_uverbs_lookup_comp_file(cmd->comp_channel,
996                                                      file->ucontext);
997                 if (IS_ERR(ev_file)) {
998                         ret = PTR_ERR(ev_file);
999                         goto err;
1000                 }
1001         }
1002
1003         obj->uobject.user_handle = cmd->user_handle;
1004         obj->uverbs_file           = file;
1005         obj->comp_events_reported  = 0;
1006         obj->async_events_reported = 0;
1007         INIT_LIST_HEAD(&obj->comp_list);
1008         INIT_LIST_HEAD(&obj->async_list);
1009
1010         attr.cqe = cmd->cqe;
1011         attr.comp_vector = cmd->comp_vector;
1012
1013         if (cmd_sz > offsetof(typeof(*cmd), flags) + sizeof(cmd->flags))
1014                 attr.flags = cmd->flags;
1015
1016         cq = ib_dev->create_cq(ib_dev, &attr, file->ucontext, uhw);
1017         if (IS_ERR(cq)) {
1018                 ret = PTR_ERR(cq);
1019                 goto err_file;
1020         }
1021
1022         cq->device        = ib_dev;
1023         cq->uobject       = &obj->uobject;
1024         cq->comp_handler  = ib_uverbs_comp_handler;
1025         cq->event_handler = ib_uverbs_cq_event_handler;
1026         cq->cq_context    = ev_file ? &ev_file->ev_queue : NULL;
1027         atomic_set(&cq->usecnt, 0);
1028
1029         obj->uobject.object = cq;
1030         memset(&resp, 0, sizeof resp);
1031         resp.base.cq_handle = obj->uobject.id;
1032         resp.base.cqe       = cq->cqe;
1033
1034         resp.response_length = offsetof(typeof(resp), response_length) +
1035                 sizeof(resp.response_length);
1036
1037         cq->res.type = RDMA_RESTRACK_CQ;
1038         rdma_restrack_add(&cq->res);
1039
1040         ret = cb(file, obj, &resp, ucore, context);
1041         if (ret)
1042                 goto err_cb;
1043
1044         uobj_alloc_commit(&obj->uobject);
1045         return obj;
1046
1047 err_cb:
1048         ib_destroy_cq(cq);
1049
1050 err_file:
1051         if (ev_file)
1052                 ib_uverbs_release_ucq(file, ev_file, obj);
1053
1054 err:
1055         uobj_alloc_abort(&obj->uobject);
1056
1057         return ERR_PTR(ret);
1058 }
1059
1060 static int ib_uverbs_create_cq_cb(struct ib_uverbs_file *file,
1061                                   struct ib_ucq_object *obj,
1062                                   struct ib_uverbs_ex_create_cq_resp *resp,
1063                                   struct ib_udata *ucore, void *context)
1064 {
1065         if (ib_copy_to_udata(ucore, &resp->base, sizeof(resp->base)))
1066                 return -EFAULT;
1067
1068         return 0;
1069 }
1070
1071 ssize_t ib_uverbs_create_cq(struct ib_uverbs_file *file,
1072                             struct ib_device *ib_dev,
1073                             const char __user *buf, int in_len,
1074                             int out_len)
1075 {
1076         struct ib_uverbs_create_cq      cmd;
1077         struct ib_uverbs_ex_create_cq   cmd_ex;
1078         struct ib_uverbs_create_cq_resp resp;
1079         struct ib_udata                 ucore;
1080         struct ib_udata                 uhw;
1081         struct ib_ucq_object           *obj;
1082
1083         if (out_len < sizeof(resp))
1084                 return -ENOSPC;
1085
1086         if (copy_from_user(&cmd, buf, sizeof(cmd)))
1087                 return -EFAULT;
1088
1089         ib_uverbs_init_udata(&ucore, buf, u64_to_user_ptr(cmd.response),
1090                              sizeof(cmd), sizeof(resp));
1091
1092         ib_uverbs_init_udata(&uhw, buf + sizeof(cmd),
1093                    u64_to_user_ptr(cmd.response) + sizeof(resp),
1094                    in_len - sizeof(cmd) - sizeof(struct ib_uverbs_cmd_hdr),
1095                    out_len - sizeof(resp));
1096
1097         memset(&cmd_ex, 0, sizeof(cmd_ex));
1098         cmd_ex.user_handle = cmd.user_handle;
1099         cmd_ex.cqe = cmd.cqe;
1100         cmd_ex.comp_vector = cmd.comp_vector;
1101         cmd_ex.comp_channel = cmd.comp_channel;
1102
1103         obj = create_cq(file, ib_dev, &ucore, &uhw, &cmd_ex,
1104                         offsetof(typeof(cmd_ex), comp_channel) +
1105                         sizeof(cmd.comp_channel), ib_uverbs_create_cq_cb,
1106                         NULL);
1107
1108         if (IS_ERR(obj))
1109                 return PTR_ERR(obj);
1110
1111         return in_len;
1112 }
1113
1114 static int ib_uverbs_ex_create_cq_cb(struct ib_uverbs_file *file,
1115                                      struct ib_ucq_object *obj,
1116                                      struct ib_uverbs_ex_create_cq_resp *resp,
1117                                      struct ib_udata *ucore, void *context)
1118 {
1119         if (ib_copy_to_udata(ucore, resp, resp->response_length))
1120                 return -EFAULT;
1121
1122         return 0;
1123 }
1124
1125 int ib_uverbs_ex_create_cq(struct ib_uverbs_file *file,
1126                          struct ib_device *ib_dev,
1127                            struct ib_udata *ucore,
1128                            struct ib_udata *uhw)
1129 {
1130         struct ib_uverbs_ex_create_cq_resp resp;
1131         struct ib_uverbs_ex_create_cq  cmd;
1132         struct ib_ucq_object           *obj;
1133         int err;
1134
1135         if (ucore->inlen < sizeof(cmd))
1136                 return -EINVAL;
1137
1138         err = ib_copy_from_udata(&cmd, ucore, sizeof(cmd));
1139         if (err)
1140                 return err;
1141
1142         if (cmd.comp_mask)
1143                 return -EINVAL;
1144
1145         if (cmd.reserved)
1146                 return -EINVAL;
1147
1148         if (ucore->outlen < (offsetof(typeof(resp), response_length) +
1149                              sizeof(resp.response_length)))
1150                 return -ENOSPC;
1151
1152         obj = create_cq(file, ib_dev, ucore, uhw, &cmd,
1153                         min(ucore->inlen, sizeof(cmd)),
1154                         ib_uverbs_ex_create_cq_cb, NULL);
1155
1156         return PTR_ERR_OR_ZERO(obj);
1157 }
1158
1159 ssize_t ib_uverbs_resize_cq(struct ib_uverbs_file *file,
1160                             struct ib_device *ib_dev,
1161                             const char __user *buf, int in_len,
1162                             int out_len)
1163 {
1164         struct ib_uverbs_resize_cq      cmd;
1165         struct ib_uverbs_resize_cq_resp resp = {};
1166         struct ib_udata                 udata;
1167         struct ib_cq                    *cq;
1168         int                             ret = -EINVAL;
1169
1170         if (copy_from_user(&cmd, buf, sizeof cmd))
1171                 return -EFAULT;
1172
1173         ib_uverbs_init_udata(&udata, buf + sizeof(cmd),
1174                    u64_to_user_ptr(cmd.response) + sizeof(resp),
1175                    in_len - sizeof(cmd) - sizeof(struct ib_uverbs_cmd_hdr),
1176                    out_len - sizeof(resp));
1177
1178         cq = uobj_get_obj_read(cq, UVERBS_OBJECT_CQ, cmd.cq_handle, file->ucontext);
1179         if (!cq)
1180                 return -EINVAL;
1181
1182         ret = cq->device->resize_cq(cq, cmd.cqe, &udata);
1183         if (ret)
1184                 goto out;
1185
1186         resp.cqe = cq->cqe;
1187
1188         if (copy_to_user(u64_to_user_ptr(cmd.response), &resp, sizeof resp.cqe))
1189                 ret = -EFAULT;
1190
1191 out:
1192         uobj_put_obj_read(cq);
1193
1194         return ret ? ret : in_len;
1195 }
1196
1197 static int copy_wc_to_user(struct ib_device *ib_dev, void __user *dest,
1198                            struct ib_wc *wc)
1199 {
1200         struct ib_uverbs_wc tmp;
1201
1202         tmp.wr_id               = wc->wr_id;
1203         tmp.status              = wc->status;
1204         tmp.opcode              = wc->opcode;
1205         tmp.vendor_err          = wc->vendor_err;
1206         tmp.byte_len            = wc->byte_len;
1207         tmp.ex.imm_data         = wc->ex.imm_data;
1208         tmp.qp_num              = wc->qp->qp_num;
1209         tmp.src_qp              = wc->src_qp;
1210         tmp.wc_flags            = wc->wc_flags;
1211         tmp.pkey_index          = wc->pkey_index;
1212         if (rdma_cap_opa_ah(ib_dev, wc->port_num))
1213                 tmp.slid        = OPA_TO_IB_UCAST_LID(wc->slid);
1214         else
1215                 tmp.slid        = ib_lid_cpu16(wc->slid);
1216         tmp.sl                  = wc->sl;
1217         tmp.dlid_path_bits      = wc->dlid_path_bits;
1218         tmp.port_num            = wc->port_num;
1219         tmp.reserved            = 0;
1220
1221         if (copy_to_user(dest, &tmp, sizeof tmp))
1222                 return -EFAULT;
1223
1224         return 0;
1225 }
1226
1227 ssize_t ib_uverbs_poll_cq(struct ib_uverbs_file *file,
1228                           struct ib_device *ib_dev,
1229                           const char __user *buf, int in_len,
1230                           int out_len)
1231 {
1232         struct ib_uverbs_poll_cq       cmd;
1233         struct ib_uverbs_poll_cq_resp  resp;
1234         u8 __user                     *header_ptr;
1235         u8 __user                     *data_ptr;
1236         struct ib_cq                  *cq;
1237         struct ib_wc                   wc;
1238         int                            ret;
1239
1240         if (copy_from_user(&cmd, buf, sizeof cmd))
1241                 return -EFAULT;
1242
1243         cq = uobj_get_obj_read(cq, UVERBS_OBJECT_CQ, cmd.cq_handle, file->ucontext);
1244         if (!cq)
1245                 return -EINVAL;
1246
1247         /* we copy a struct ib_uverbs_poll_cq_resp to user space */
1248         header_ptr = u64_to_user_ptr(cmd.response);
1249         data_ptr = header_ptr + sizeof resp;
1250
1251         memset(&resp, 0, sizeof resp);
1252         while (resp.count < cmd.ne) {
1253                 ret = ib_poll_cq(cq, 1, &wc);
1254                 if (ret < 0)
1255                         goto out_put;
1256                 if (!ret)
1257                         break;
1258
1259                 ret = copy_wc_to_user(ib_dev, data_ptr, &wc);
1260                 if (ret)
1261                         goto out_put;
1262
1263                 data_ptr += sizeof(struct ib_uverbs_wc);
1264                 ++resp.count;
1265         }
1266
1267         if (copy_to_user(header_ptr, &resp, sizeof resp)) {
1268                 ret = -EFAULT;
1269                 goto out_put;
1270         }
1271
1272         ret = in_len;
1273
1274 out_put:
1275         uobj_put_obj_read(cq);
1276         return ret;
1277 }
1278
1279 ssize_t ib_uverbs_req_notify_cq(struct ib_uverbs_file *file,
1280                                 struct ib_device *ib_dev,
1281                                 const char __user *buf, int in_len,
1282                                 int out_len)
1283 {
1284         struct ib_uverbs_req_notify_cq cmd;
1285         struct ib_cq                  *cq;
1286
1287         if (copy_from_user(&cmd, buf, sizeof cmd))
1288                 return -EFAULT;
1289
1290         cq = uobj_get_obj_read(cq, UVERBS_OBJECT_CQ, cmd.cq_handle, file->ucontext);
1291         if (!cq)
1292                 return -EINVAL;
1293
1294         ib_req_notify_cq(cq, cmd.solicited_only ?
1295                          IB_CQ_SOLICITED : IB_CQ_NEXT_COMP);
1296
1297         uobj_put_obj_read(cq);
1298
1299         return in_len;
1300 }
1301
1302 ssize_t ib_uverbs_destroy_cq(struct ib_uverbs_file *file,
1303                              struct ib_device *ib_dev,
1304                              const char __user *buf, int in_len,
1305                              int out_len)
1306 {
1307         struct ib_uverbs_destroy_cq      cmd;
1308         struct ib_uverbs_destroy_cq_resp resp;
1309         struct ib_uobject               *uobj;
1310         struct ib_cq                    *cq;
1311         struct ib_ucq_object            *obj;
1312         int                              ret = -EINVAL;
1313
1314         if (copy_from_user(&cmd, buf, sizeof cmd))
1315                 return -EFAULT;
1316
1317         uobj  = uobj_get_write(UVERBS_OBJECT_CQ, cmd.cq_handle,
1318                                file->ucontext);
1319         if (IS_ERR(uobj))
1320                 return PTR_ERR(uobj);
1321
1322         /*
1323          * Make sure we don't free the memory in remove_commit as we still
1324          * needs the uobject memory to create the response.
1325          */
1326         uverbs_uobject_get(uobj);
1327         cq      = uobj->object;
1328         obj     = container_of(cq->uobject, struct ib_ucq_object, uobject);
1329
1330         memset(&resp, 0, sizeof(resp));
1331
1332         ret = uobj_remove_commit(uobj);
1333         if (ret) {
1334                 uverbs_uobject_put(uobj);
1335                 return ret;
1336         }
1337
1338         resp.comp_events_reported  = obj->comp_events_reported;
1339         resp.async_events_reported = obj->async_events_reported;
1340
1341         uverbs_uobject_put(uobj);
1342         if (copy_to_user(u64_to_user_ptr(cmd.response), &resp, sizeof resp))
1343                 return -EFAULT;
1344
1345         return in_len;
1346 }
1347
1348 static int create_qp(struct ib_uverbs_file *file,
1349                      struct ib_udata *ucore,
1350                      struct ib_udata *uhw,
1351                      struct ib_uverbs_ex_create_qp *cmd,
1352                      size_t cmd_sz,
1353                      int (*cb)(struct ib_uverbs_file *file,
1354                                struct ib_uverbs_ex_create_qp_resp *resp,
1355                                struct ib_udata *udata),
1356                      void *context)
1357 {
1358         struct ib_uqp_object            *obj;
1359         struct ib_device                *device;
1360         struct ib_pd                    *pd = NULL;
1361         struct ib_xrcd                  *xrcd = NULL;
1362         struct ib_uobject               *xrcd_uobj = ERR_PTR(-ENOENT);
1363         struct ib_cq                    *scq = NULL, *rcq = NULL;
1364         struct ib_srq                   *srq = NULL;
1365         struct ib_qp                    *qp;
1366         char                            *buf;
1367         struct ib_qp_init_attr          attr = {};
1368         struct ib_uverbs_ex_create_qp_resp resp;
1369         int                             ret;
1370         struct ib_rwq_ind_table *ind_tbl = NULL;
1371         bool has_sq = true;
1372
1373         if (cmd->qp_type == IB_QPT_RAW_PACKET && !capable(CAP_NET_RAW))
1374                 return -EPERM;
1375
1376         obj  = (struct ib_uqp_object *)uobj_alloc(UVERBS_OBJECT_QP,
1377                                                   file->ucontext);
1378         if (IS_ERR(obj))
1379                 return PTR_ERR(obj);
1380         obj->uxrcd = NULL;
1381         obj->uevent.uobject.user_handle = cmd->user_handle;
1382         mutex_init(&obj->mcast_lock);
1383
1384         if (cmd_sz >= offsetof(typeof(*cmd), rwq_ind_tbl_handle) +
1385                       sizeof(cmd->rwq_ind_tbl_handle) &&
1386                       (cmd->comp_mask & IB_UVERBS_CREATE_QP_MASK_IND_TABLE)) {
1387                 ind_tbl = uobj_get_obj_read(rwq_ind_table, UVERBS_OBJECT_RWQ_IND_TBL,
1388                                             cmd->rwq_ind_tbl_handle,
1389                                             file->ucontext);
1390                 if (!ind_tbl) {
1391                         ret = -EINVAL;
1392                         goto err_put;
1393                 }
1394
1395                 attr.rwq_ind_tbl = ind_tbl;
1396         }
1397
1398         if (cmd_sz > sizeof(*cmd) &&
1399             !ib_is_udata_cleared(ucore, sizeof(*cmd),
1400                                  cmd_sz - sizeof(*cmd))) {
1401                 ret = -EOPNOTSUPP;
1402                 goto err_put;
1403         }
1404
1405         if (ind_tbl && (cmd->max_recv_wr || cmd->max_recv_sge || cmd->is_srq)) {
1406                 ret = -EINVAL;
1407                 goto err_put;
1408         }
1409
1410         if (ind_tbl && !cmd->max_send_wr)
1411                 has_sq = false;
1412
1413         if (cmd->qp_type == IB_QPT_XRC_TGT) {
1414                 xrcd_uobj = uobj_get_read(UVERBS_OBJECT_XRCD, cmd->pd_handle,
1415                                           file->ucontext);
1416
1417                 if (IS_ERR(xrcd_uobj)) {
1418                         ret = -EINVAL;
1419                         goto err_put;
1420                 }
1421
1422                 xrcd = (struct ib_xrcd *)xrcd_uobj->object;
1423                 if (!xrcd) {
1424                         ret = -EINVAL;
1425                         goto err_put;
1426                 }
1427                 device = xrcd->device;
1428         } else {
1429                 if (cmd->qp_type == IB_QPT_XRC_INI) {
1430                         cmd->max_recv_wr = 0;
1431                         cmd->max_recv_sge = 0;
1432                 } else {
1433                         if (cmd->is_srq) {
1434                                 srq = uobj_get_obj_read(srq, UVERBS_OBJECT_SRQ, cmd->srq_handle,
1435                                                         file->ucontext);
1436                                 if (!srq || srq->srq_type == IB_SRQT_XRC) {
1437                                         ret = -EINVAL;
1438                                         goto err_put;
1439                                 }
1440                         }
1441
1442                         if (!ind_tbl) {
1443                                 if (cmd->recv_cq_handle != cmd->send_cq_handle) {
1444                                         rcq = uobj_get_obj_read(cq, UVERBS_OBJECT_CQ, cmd->recv_cq_handle,
1445                                                                 file->ucontext);
1446                                         if (!rcq) {
1447                                                 ret = -EINVAL;
1448                                                 goto err_put;
1449                                         }
1450                                 }
1451                         }
1452                 }
1453
1454                 if (has_sq)
1455                         scq = uobj_get_obj_read(cq, UVERBS_OBJECT_CQ, cmd->send_cq_handle,
1456                                                 file->ucontext);
1457                 if (!ind_tbl)
1458                         rcq = rcq ?: scq;
1459                 pd  = uobj_get_obj_read(pd, UVERBS_OBJECT_PD, cmd->pd_handle, file->ucontext);
1460                 if (!pd || (!scq && has_sq)) {
1461                         ret = -EINVAL;
1462                         goto err_put;
1463                 }
1464
1465                 device = pd->device;
1466         }
1467
1468         attr.event_handler = ib_uverbs_qp_event_handler;
1469         attr.qp_context    = file;
1470         attr.send_cq       = scq;
1471         attr.recv_cq       = rcq;
1472         attr.srq           = srq;
1473         attr.xrcd          = xrcd;
1474         attr.sq_sig_type   = cmd->sq_sig_all ? IB_SIGNAL_ALL_WR :
1475                                               IB_SIGNAL_REQ_WR;
1476         attr.qp_type       = cmd->qp_type;
1477         attr.create_flags  = 0;
1478
1479         attr.cap.max_send_wr     = cmd->max_send_wr;
1480         attr.cap.max_recv_wr     = cmd->max_recv_wr;
1481         attr.cap.max_send_sge    = cmd->max_send_sge;
1482         attr.cap.max_recv_sge    = cmd->max_recv_sge;
1483         attr.cap.max_inline_data = cmd->max_inline_data;
1484
1485         obj->uevent.events_reported     = 0;
1486         INIT_LIST_HEAD(&obj->uevent.event_list);
1487         INIT_LIST_HEAD(&obj->mcast_list);
1488
1489         if (cmd_sz >= offsetof(typeof(*cmd), create_flags) +
1490                       sizeof(cmd->create_flags))
1491                 attr.create_flags = cmd->create_flags;
1492
1493         if (attr.create_flags & ~(IB_QP_CREATE_BLOCK_MULTICAST_LOOPBACK |
1494                                 IB_QP_CREATE_CROSS_CHANNEL |
1495                                 IB_QP_CREATE_MANAGED_SEND |
1496                                 IB_QP_CREATE_MANAGED_RECV |
1497                                 IB_QP_CREATE_SCATTER_FCS |
1498                                 IB_QP_CREATE_CVLAN_STRIPPING |
1499                                 IB_QP_CREATE_SOURCE_QPN |
1500                                 IB_QP_CREATE_PCI_WRITE_END_PADDING)) {
1501                 ret = -EINVAL;
1502                 goto err_put;
1503         }
1504
1505         if (attr.create_flags & IB_QP_CREATE_SOURCE_QPN) {
1506                 if (!capable(CAP_NET_RAW)) {
1507                         ret = -EPERM;
1508                         goto err_put;
1509                 }
1510
1511                 attr.source_qpn = cmd->source_qpn;
1512         }
1513
1514         buf = (void *)cmd + sizeof(*cmd);
1515         if (cmd_sz > sizeof(*cmd))
1516                 if (!(buf[0] == 0 && !memcmp(buf, buf + 1,
1517                                              cmd_sz - sizeof(*cmd) - 1))) {
1518                         ret = -EINVAL;
1519                         goto err_put;
1520                 }
1521
1522         if (cmd->qp_type == IB_QPT_XRC_TGT)
1523                 qp = ib_create_qp(pd, &attr);
1524         else
1525                 qp = _ib_create_qp(device, pd, &attr, uhw,
1526                                    &obj->uevent.uobject);
1527
1528         if (IS_ERR(qp)) {
1529                 ret = PTR_ERR(qp);
1530                 goto err_put;
1531         }
1532
1533         if (cmd->qp_type != IB_QPT_XRC_TGT) {
1534                 ret = ib_create_qp_security(qp, device);
1535                 if (ret)
1536                         goto err_cb;
1537
1538                 qp->real_qp       = qp;
1539                 qp->pd            = pd;
1540                 qp->send_cq       = attr.send_cq;
1541                 qp->recv_cq       = attr.recv_cq;
1542                 qp->srq           = attr.srq;
1543                 qp->rwq_ind_tbl   = ind_tbl;
1544                 qp->event_handler = attr.event_handler;
1545                 qp->qp_context    = attr.qp_context;
1546                 qp->qp_type       = attr.qp_type;
1547                 atomic_set(&qp->usecnt, 0);
1548                 atomic_inc(&pd->usecnt);
1549                 qp->port = 0;
1550                 if (attr.send_cq)
1551                         atomic_inc(&attr.send_cq->usecnt);
1552                 if (attr.recv_cq)
1553                         atomic_inc(&attr.recv_cq->usecnt);
1554                 if (attr.srq)
1555                         atomic_inc(&attr.srq->usecnt);
1556                 if (ind_tbl)
1557                         atomic_inc(&ind_tbl->usecnt);
1558         } else {
1559                 /* It is done in _ib_create_qp for other QP types */
1560                 qp->uobject = &obj->uevent.uobject;
1561         }
1562
1563         obj->uevent.uobject.object = qp;
1564
1565         memset(&resp, 0, sizeof resp);
1566         resp.base.qpn             = qp->qp_num;
1567         resp.base.qp_handle       = obj->uevent.uobject.id;
1568         resp.base.max_recv_sge    = attr.cap.max_recv_sge;
1569         resp.base.max_send_sge    = attr.cap.max_send_sge;
1570         resp.base.max_recv_wr     = attr.cap.max_recv_wr;
1571         resp.base.max_send_wr     = attr.cap.max_send_wr;
1572         resp.base.max_inline_data = attr.cap.max_inline_data;
1573
1574         resp.response_length = offsetof(typeof(resp), response_length) +
1575                                sizeof(resp.response_length);
1576
1577         ret = cb(file, &resp, ucore);
1578         if (ret)
1579                 goto err_cb;
1580
1581         if (xrcd) {
1582                 obj->uxrcd = container_of(xrcd_uobj, struct ib_uxrcd_object,
1583                                           uobject);
1584                 atomic_inc(&obj->uxrcd->refcnt);
1585                 uobj_put_read(xrcd_uobj);
1586         }
1587
1588         if (pd)
1589                 uobj_put_obj_read(pd);
1590         if (scq)
1591                 uobj_put_obj_read(scq);
1592         if (rcq && rcq != scq)
1593                 uobj_put_obj_read(rcq);
1594         if (srq)
1595                 uobj_put_obj_read(srq);
1596         if (ind_tbl)
1597                 uobj_put_obj_read(ind_tbl);
1598
1599         uobj_alloc_commit(&obj->uevent.uobject);
1600
1601         return 0;
1602 err_cb:
1603         ib_destroy_qp(qp);
1604
1605 err_put:
1606         if (!IS_ERR(xrcd_uobj))
1607                 uobj_put_read(xrcd_uobj);
1608         if (pd)
1609                 uobj_put_obj_read(pd);
1610         if (scq)
1611                 uobj_put_obj_read(scq);
1612         if (rcq && rcq != scq)
1613                 uobj_put_obj_read(rcq);
1614         if (srq)
1615                 uobj_put_obj_read(srq);
1616         if (ind_tbl)
1617                 uobj_put_obj_read(ind_tbl);
1618
1619         uobj_alloc_abort(&obj->uevent.uobject);
1620         return ret;
1621 }
1622
1623 static int ib_uverbs_create_qp_cb(struct ib_uverbs_file *file,
1624                                   struct ib_uverbs_ex_create_qp_resp *resp,
1625                                   struct ib_udata *ucore)
1626 {
1627         if (ib_copy_to_udata(ucore, &resp->base, sizeof(resp->base)))
1628                 return -EFAULT;
1629
1630         return 0;
1631 }
1632
1633 ssize_t ib_uverbs_create_qp(struct ib_uverbs_file *file,
1634                             struct ib_device *ib_dev,
1635                             const char __user *buf, int in_len,
1636                             int out_len)
1637 {
1638         struct ib_uverbs_create_qp      cmd;
1639         struct ib_uverbs_ex_create_qp   cmd_ex;
1640         struct ib_udata                 ucore;
1641         struct ib_udata                 uhw;
1642         ssize_t resp_size = sizeof(struct ib_uverbs_create_qp_resp);
1643         int                             err;
1644
1645         if (out_len < resp_size)
1646                 return -ENOSPC;
1647
1648         if (copy_from_user(&cmd, buf, sizeof(cmd)))
1649                 return -EFAULT;
1650
1651         ib_uverbs_init_udata(&ucore, buf, u64_to_user_ptr(cmd.response),
1652                    sizeof(cmd), resp_size);
1653         ib_uverbs_init_udata(&uhw, buf + sizeof(cmd),
1654                    u64_to_user_ptr(cmd.response) + resp_size,
1655                    in_len - sizeof(cmd) - sizeof(struct ib_uverbs_cmd_hdr),
1656                    out_len - resp_size);
1657
1658         memset(&cmd_ex, 0, sizeof(cmd_ex));
1659         cmd_ex.user_handle = cmd.user_handle;
1660         cmd_ex.pd_handle = cmd.pd_handle;
1661         cmd_ex.send_cq_handle = cmd.send_cq_handle;
1662         cmd_ex.recv_cq_handle = cmd.recv_cq_handle;
1663         cmd_ex.srq_handle = cmd.srq_handle;
1664         cmd_ex.max_send_wr = cmd.max_send_wr;
1665         cmd_ex.max_recv_wr = cmd.max_recv_wr;
1666         cmd_ex.max_send_sge = cmd.max_send_sge;
1667         cmd_ex.max_recv_sge = cmd.max_recv_sge;
1668         cmd_ex.max_inline_data = cmd.max_inline_data;
1669         cmd_ex.sq_sig_all = cmd.sq_sig_all;
1670         cmd_ex.qp_type = cmd.qp_type;
1671         cmd_ex.is_srq = cmd.is_srq;
1672
1673         err = create_qp(file, &ucore, &uhw, &cmd_ex,
1674                         offsetof(typeof(cmd_ex), is_srq) +
1675                         sizeof(cmd.is_srq), ib_uverbs_create_qp_cb,
1676                         NULL);
1677
1678         if (err)
1679                 return err;
1680
1681         return in_len;
1682 }
1683
1684 static int ib_uverbs_ex_create_qp_cb(struct ib_uverbs_file *file,
1685                                      struct ib_uverbs_ex_create_qp_resp *resp,
1686                                      struct ib_udata *ucore)
1687 {
1688         if (ib_copy_to_udata(ucore, resp, resp->response_length))
1689                 return -EFAULT;
1690
1691         return 0;
1692 }
1693
1694 int ib_uverbs_ex_create_qp(struct ib_uverbs_file *file,
1695                            struct ib_device *ib_dev,
1696                            struct ib_udata *ucore,
1697                            struct ib_udata *uhw)
1698 {
1699         struct ib_uverbs_ex_create_qp_resp resp;
1700         struct ib_uverbs_ex_create_qp cmd = {0};
1701         int err;
1702
1703         if (ucore->inlen < (offsetof(typeof(cmd), comp_mask) +
1704                             sizeof(cmd.comp_mask)))
1705                 return -EINVAL;
1706
1707         err = ib_copy_from_udata(&cmd, ucore, min(sizeof(cmd), ucore->inlen));
1708         if (err)
1709                 return err;
1710
1711         if (cmd.comp_mask & ~IB_UVERBS_CREATE_QP_SUP_COMP_MASK)
1712                 return -EINVAL;
1713
1714         if (cmd.reserved)
1715                 return -EINVAL;
1716
1717         if (ucore->outlen < (offsetof(typeof(resp), response_length) +
1718                              sizeof(resp.response_length)))
1719                 return -ENOSPC;
1720
1721         err = create_qp(file, ucore, uhw, &cmd,
1722                         min(ucore->inlen, sizeof(cmd)),
1723                         ib_uverbs_ex_create_qp_cb, NULL);
1724
1725         if (err)
1726                 return err;
1727
1728         return 0;
1729 }
1730
1731 ssize_t ib_uverbs_open_qp(struct ib_uverbs_file *file,
1732                           struct ib_device *ib_dev,
1733                           const char __user *buf, int in_len, int out_len)
1734 {
1735         struct ib_uverbs_open_qp        cmd;
1736         struct ib_uverbs_create_qp_resp resp;
1737         struct ib_udata                 udata;
1738         struct ib_uqp_object           *obj;
1739         struct ib_xrcd                 *xrcd;
1740         struct ib_uobject              *uninitialized_var(xrcd_uobj);
1741         struct ib_qp                   *qp;
1742         struct ib_qp_open_attr          attr;
1743         int ret;
1744
1745         if (out_len < sizeof resp)
1746                 return -ENOSPC;
1747
1748         if (copy_from_user(&cmd, buf, sizeof cmd))
1749                 return -EFAULT;
1750
1751         ib_uverbs_init_udata(&udata, buf + sizeof(cmd),
1752                    u64_to_user_ptr(cmd.response) + sizeof(resp),
1753                    in_len - sizeof(cmd) - sizeof(struct ib_uverbs_cmd_hdr),
1754                    out_len - sizeof(resp));
1755
1756         obj  = (struct ib_uqp_object *)uobj_alloc(UVERBS_OBJECT_QP,
1757                                                   file->ucontext);
1758         if (IS_ERR(obj))
1759                 return PTR_ERR(obj);
1760
1761         xrcd_uobj = uobj_get_read(UVERBS_OBJECT_XRCD, cmd.pd_handle,
1762                                   file->ucontext);
1763         if (IS_ERR(xrcd_uobj)) {
1764                 ret = -EINVAL;
1765                 goto err_put;
1766         }
1767
1768         xrcd = (struct ib_xrcd *)xrcd_uobj->object;
1769         if (!xrcd) {
1770                 ret = -EINVAL;
1771                 goto err_xrcd;
1772         }
1773
1774         attr.event_handler = ib_uverbs_qp_event_handler;
1775         attr.qp_context    = file;
1776         attr.qp_num        = cmd.qpn;
1777         attr.qp_type       = cmd.qp_type;
1778
1779         obj->uevent.events_reported = 0;
1780         INIT_LIST_HEAD(&obj->uevent.event_list);
1781         INIT_LIST_HEAD(&obj->mcast_list);
1782
1783         qp = ib_open_qp(xrcd, &attr);
1784         if (IS_ERR(qp)) {
1785                 ret = PTR_ERR(qp);
1786                 goto err_xrcd;
1787         }
1788
1789         obj->uevent.uobject.object = qp;
1790         obj->uevent.uobject.user_handle = cmd.user_handle;
1791
1792         memset(&resp, 0, sizeof resp);
1793         resp.qpn       = qp->qp_num;
1794         resp.qp_handle = obj->uevent.uobject.id;
1795
1796         if (copy_to_user(u64_to_user_ptr(cmd.response), &resp, sizeof resp)) {
1797                 ret = -EFAULT;
1798                 goto err_destroy;
1799         }
1800
1801         obj->uxrcd = container_of(xrcd_uobj, struct ib_uxrcd_object, uobject);
1802         atomic_inc(&obj->uxrcd->refcnt);
1803         qp->uobject = &obj->uevent.uobject;
1804         uobj_put_read(xrcd_uobj);
1805
1806
1807         uobj_alloc_commit(&obj->uevent.uobject);
1808
1809         return in_len;
1810
1811 err_destroy:
1812         ib_destroy_qp(qp);
1813 err_xrcd:
1814         uobj_put_read(xrcd_uobj);
1815 err_put:
1816         uobj_alloc_abort(&obj->uevent.uobject);
1817         return ret;
1818 }
1819
1820 static void copy_ah_attr_to_uverbs(struct ib_uverbs_qp_dest *uverb_attr,
1821                                    struct rdma_ah_attr *rdma_attr)
1822 {
1823         const struct ib_global_route   *grh;
1824
1825         uverb_attr->dlid              = rdma_ah_get_dlid(rdma_attr);
1826         uverb_attr->sl                = rdma_ah_get_sl(rdma_attr);
1827         uverb_attr->src_path_bits     = rdma_ah_get_path_bits(rdma_attr);
1828         uverb_attr->static_rate       = rdma_ah_get_static_rate(rdma_attr);
1829         uverb_attr->is_global         = !!(rdma_ah_get_ah_flags(rdma_attr) &
1830                                          IB_AH_GRH);
1831         if (uverb_attr->is_global) {
1832                 grh = rdma_ah_read_grh(rdma_attr);
1833                 memcpy(uverb_attr->dgid, grh->dgid.raw, 16);
1834                 uverb_attr->flow_label        = grh->flow_label;
1835                 uverb_attr->sgid_index        = grh->sgid_index;
1836                 uverb_attr->hop_limit         = grh->hop_limit;
1837                 uverb_attr->traffic_class     = grh->traffic_class;
1838         }
1839         uverb_attr->port_num          = rdma_ah_get_port_num(rdma_attr);
1840 }
1841
1842 ssize_t ib_uverbs_query_qp(struct ib_uverbs_file *file,
1843                            struct ib_device *ib_dev,
1844                            const char __user *buf, int in_len,
1845                            int out_len)
1846 {
1847         struct ib_uverbs_query_qp      cmd;
1848         struct ib_uverbs_query_qp_resp resp;
1849         struct ib_qp                   *qp;
1850         struct ib_qp_attr              *attr;
1851         struct ib_qp_init_attr         *init_attr;
1852         int                            ret;
1853
1854         if (copy_from_user(&cmd, buf, sizeof cmd))
1855                 return -EFAULT;
1856
1857         attr      = kmalloc(sizeof *attr, GFP_KERNEL);
1858         init_attr = kmalloc(sizeof *init_attr, GFP_KERNEL);
1859         if (!attr || !init_attr) {
1860                 ret = -ENOMEM;
1861                 goto out;
1862         }
1863
1864         qp = uobj_get_obj_read(qp, UVERBS_OBJECT_QP, cmd.qp_handle, file->ucontext);
1865         if (!qp) {
1866                 ret = -EINVAL;
1867                 goto out;
1868         }
1869
1870         ret = ib_query_qp(qp, attr, cmd.attr_mask, init_attr);
1871
1872         uobj_put_obj_read(qp);
1873
1874         if (ret)
1875                 goto out;
1876
1877         memset(&resp, 0, sizeof resp);
1878
1879         resp.qp_state               = attr->qp_state;
1880         resp.cur_qp_state           = attr->cur_qp_state;
1881         resp.path_mtu               = attr->path_mtu;
1882         resp.path_mig_state         = attr->path_mig_state;
1883         resp.qkey                   = attr->qkey;
1884         resp.rq_psn                 = attr->rq_psn;
1885         resp.sq_psn                 = attr->sq_psn;
1886         resp.dest_qp_num            = attr->dest_qp_num;
1887         resp.qp_access_flags        = attr->qp_access_flags;
1888         resp.pkey_index             = attr->pkey_index;
1889         resp.alt_pkey_index         = attr->alt_pkey_index;
1890         resp.sq_draining            = attr->sq_draining;
1891         resp.max_rd_atomic          = attr->max_rd_atomic;
1892         resp.max_dest_rd_atomic     = attr->max_dest_rd_atomic;
1893         resp.min_rnr_timer          = attr->min_rnr_timer;
1894         resp.port_num               = attr->port_num;
1895         resp.timeout                = attr->timeout;
1896         resp.retry_cnt              = attr->retry_cnt;
1897         resp.rnr_retry              = attr->rnr_retry;
1898         resp.alt_port_num           = attr->alt_port_num;
1899         resp.alt_timeout            = attr->alt_timeout;
1900
1901         copy_ah_attr_to_uverbs(&resp.dest, &attr->ah_attr);
1902         copy_ah_attr_to_uverbs(&resp.alt_dest, &attr->alt_ah_attr);
1903
1904         resp.max_send_wr            = init_attr->cap.max_send_wr;
1905         resp.max_recv_wr            = init_attr->cap.max_recv_wr;
1906         resp.max_send_sge           = init_attr->cap.max_send_sge;
1907         resp.max_recv_sge           = init_attr->cap.max_recv_sge;
1908         resp.max_inline_data        = init_attr->cap.max_inline_data;
1909         resp.sq_sig_all             = init_attr->sq_sig_type == IB_SIGNAL_ALL_WR;
1910
1911         if (copy_to_user(u64_to_user_ptr(cmd.response), &resp, sizeof resp))
1912                 ret = -EFAULT;
1913
1914 out:
1915         kfree(attr);
1916         kfree(init_attr);
1917
1918         return ret ? ret : in_len;
1919 }
1920
1921 /* Remove ignored fields set in the attribute mask */
1922 static int modify_qp_mask(enum ib_qp_type qp_type, int mask)
1923 {
1924         switch (qp_type) {
1925         case IB_QPT_XRC_INI:
1926                 return mask & ~(IB_QP_MAX_DEST_RD_ATOMIC | IB_QP_MIN_RNR_TIMER);
1927         case IB_QPT_XRC_TGT:
1928                 return mask & ~(IB_QP_MAX_QP_RD_ATOMIC | IB_QP_RETRY_CNT |
1929                                 IB_QP_RNR_RETRY);
1930         default:
1931                 return mask;
1932         }
1933 }
1934
1935 static void copy_ah_attr_from_uverbs(struct ib_device *dev,
1936                                      struct rdma_ah_attr *rdma_attr,
1937                                      struct ib_uverbs_qp_dest *uverb_attr)
1938 {
1939         rdma_attr->type = rdma_ah_find_type(dev, uverb_attr->port_num);
1940         if (uverb_attr->is_global) {
1941                 rdma_ah_set_grh(rdma_attr, NULL,
1942                                 uverb_attr->flow_label,
1943                                 uverb_attr->sgid_index,
1944                                 uverb_attr->hop_limit,
1945                                 uverb_attr->traffic_class);
1946                 rdma_ah_set_dgid_raw(rdma_attr, uverb_attr->dgid);
1947         } else {
1948                 rdma_ah_set_ah_flags(rdma_attr, 0);
1949         }
1950         rdma_ah_set_dlid(rdma_attr, uverb_attr->dlid);
1951         rdma_ah_set_sl(rdma_attr, uverb_attr->sl);
1952         rdma_ah_set_path_bits(rdma_attr, uverb_attr->src_path_bits);
1953         rdma_ah_set_static_rate(rdma_attr, uverb_attr->static_rate);
1954         rdma_ah_set_port_num(rdma_attr, uverb_attr->port_num);
1955         rdma_ah_set_make_grd(rdma_attr, false);
1956 }
1957
1958 static int modify_qp(struct ib_uverbs_file *file,
1959                      struct ib_uverbs_ex_modify_qp *cmd, struct ib_udata *udata)
1960 {
1961         struct ib_qp_attr *attr;
1962         struct ib_qp *qp;
1963         int ret;
1964
1965         attr = kmalloc(sizeof *attr, GFP_KERNEL);
1966         if (!attr)
1967                 return -ENOMEM;
1968
1969         qp = uobj_get_obj_read(qp, UVERBS_OBJECT_QP, cmd->base.qp_handle, file->ucontext);
1970         if (!qp) {
1971                 ret = -EINVAL;
1972                 goto out;
1973         }
1974
1975         if ((cmd->base.attr_mask & IB_QP_PORT) &&
1976             !rdma_is_port_valid(qp->device, cmd->base.port_num)) {
1977                 ret = -EINVAL;
1978                 goto release_qp;
1979         }
1980
1981         if ((cmd->base.attr_mask & IB_QP_AV) &&
1982             !rdma_is_port_valid(qp->device, cmd->base.dest.port_num)) {
1983                 ret = -EINVAL;
1984                 goto release_qp;
1985         }
1986
1987         if ((cmd->base.attr_mask & IB_QP_ALT_PATH) &&
1988             (!rdma_is_port_valid(qp->device, cmd->base.alt_port_num) ||
1989             !rdma_is_port_valid(qp->device, cmd->base.alt_dest.port_num))) {
1990                 ret = -EINVAL;
1991                 goto release_qp;
1992         }
1993
1994         if ((cmd->base.attr_mask & IB_QP_CUR_STATE &&
1995             cmd->base.cur_qp_state > IB_QPS_ERR) ||
1996             cmd->base.qp_state > IB_QPS_ERR) {
1997                 ret = -EINVAL;
1998                 goto release_qp;
1999         }
2000
2001         attr->qp_state            = cmd->base.qp_state;
2002         attr->cur_qp_state        = cmd->base.cur_qp_state;
2003         attr->path_mtu            = cmd->base.path_mtu;
2004         attr->path_mig_state      = cmd->base.path_mig_state;
2005         attr->qkey                = cmd->base.qkey;
2006         attr->rq_psn              = cmd->base.rq_psn;
2007         attr->sq_psn              = cmd->base.sq_psn;
2008         attr->dest_qp_num         = cmd->base.dest_qp_num;
2009         attr->qp_access_flags     = cmd->base.qp_access_flags;
2010         attr->pkey_index          = cmd->base.pkey_index;
2011         attr->alt_pkey_index      = cmd->base.alt_pkey_index;
2012         attr->en_sqd_async_notify = cmd->base.en_sqd_async_notify;
2013         attr->max_rd_atomic       = cmd->base.max_rd_atomic;
2014         attr->max_dest_rd_atomic  = cmd->base.max_dest_rd_atomic;
2015         attr->min_rnr_timer       = cmd->base.min_rnr_timer;
2016         attr->port_num            = cmd->base.port_num;
2017         attr->timeout             = cmd->base.timeout;
2018         attr->retry_cnt           = cmd->base.retry_cnt;
2019         attr->rnr_retry           = cmd->base.rnr_retry;
2020         attr->alt_port_num        = cmd->base.alt_port_num;
2021         attr->alt_timeout         = cmd->base.alt_timeout;
2022         attr->rate_limit          = cmd->rate_limit;
2023
2024         if (cmd->base.attr_mask & IB_QP_AV)
2025                 copy_ah_attr_from_uverbs(qp->device, &attr->ah_attr,
2026                                          &cmd->base.dest);
2027
2028         if (cmd->base.attr_mask & IB_QP_ALT_PATH)
2029                 copy_ah_attr_from_uverbs(qp->device, &attr->alt_ah_attr,
2030                                          &cmd->base.alt_dest);
2031
2032         ret = ib_modify_qp_with_udata(qp, attr,
2033                                       modify_qp_mask(qp->qp_type,
2034                                                      cmd->base.attr_mask),
2035                                       udata);
2036
2037 release_qp:
2038         uobj_put_obj_read(qp);
2039 out:
2040         kfree(attr);
2041
2042         return ret;
2043 }
2044
2045 ssize_t ib_uverbs_modify_qp(struct ib_uverbs_file *file,
2046                             struct ib_device *ib_dev,
2047                             const char __user *buf, int in_len,
2048                             int out_len)
2049 {
2050         struct ib_uverbs_ex_modify_qp cmd = {};
2051         struct ib_udata udata;
2052         int ret;
2053
2054         if (copy_from_user(&cmd.base, buf, sizeof(cmd.base)))
2055                 return -EFAULT;
2056
2057         if (cmd.base.attr_mask &
2058             ~((IB_USER_LEGACY_LAST_QP_ATTR_MASK << 1) - 1))
2059                 return -EOPNOTSUPP;
2060
2061         ib_uverbs_init_udata(&udata, buf + sizeof(cmd.base), NULL,
2062                    in_len - sizeof(cmd.base) - sizeof(struct ib_uverbs_cmd_hdr),
2063                    out_len);
2064
2065         ret = modify_qp(file, &cmd, &udata);
2066         if (ret)
2067                 return ret;
2068
2069         return in_len;
2070 }
2071
2072 int ib_uverbs_ex_modify_qp(struct ib_uverbs_file *file,
2073                            struct ib_device *ib_dev,
2074                            struct ib_udata *ucore,
2075                            struct ib_udata *uhw)
2076 {
2077         struct ib_uverbs_ex_modify_qp cmd = {};
2078         int ret;
2079
2080         /*
2081          * Last bit is reserved for extending the attr_mask by
2082          * using another field.
2083          */
2084         BUILD_BUG_ON(IB_USER_LAST_QP_ATTR_MASK == (1 << 31));
2085
2086         if (ucore->inlen < sizeof(cmd.base))
2087                 return -EINVAL;
2088
2089         ret = ib_copy_from_udata(&cmd, ucore, min(sizeof(cmd), ucore->inlen));
2090         if (ret)
2091                 return ret;
2092
2093         if (cmd.base.attr_mask &
2094             ~((IB_USER_LAST_QP_ATTR_MASK << 1) - 1))
2095                 return -EOPNOTSUPP;
2096
2097         if (ucore->inlen > sizeof(cmd)) {
2098                 if (!ib_is_udata_cleared(ucore, sizeof(cmd),
2099                                          ucore->inlen - sizeof(cmd)))
2100                         return -EOPNOTSUPP;
2101         }
2102
2103         ret = modify_qp(file, &cmd, uhw);
2104
2105         return ret;
2106 }
2107
2108 ssize_t ib_uverbs_destroy_qp(struct ib_uverbs_file *file,
2109                              struct ib_device *ib_dev,
2110                              const char __user *buf, int in_len,
2111                              int out_len)
2112 {
2113         struct ib_uverbs_destroy_qp      cmd;
2114         struct ib_uverbs_destroy_qp_resp resp;
2115         struct ib_uobject               *uobj;
2116         struct ib_uqp_object            *obj;
2117         int                              ret = -EINVAL;
2118
2119         if (copy_from_user(&cmd, buf, sizeof cmd))
2120                 return -EFAULT;
2121
2122         memset(&resp, 0, sizeof resp);
2123
2124         uobj  = uobj_get_write(UVERBS_OBJECT_QP, cmd.qp_handle,
2125                                file->ucontext);
2126         if (IS_ERR(uobj))
2127                 return PTR_ERR(uobj);
2128
2129         obj = container_of(uobj, struct ib_uqp_object, uevent.uobject);
2130         /*
2131          * Make sure we don't free the memory in remove_commit as we still
2132          * needs the uobject memory to create the response.
2133          */
2134         uverbs_uobject_get(uobj);
2135
2136         ret = uobj_remove_commit(uobj);
2137         if (ret) {
2138                 uverbs_uobject_put(uobj);
2139                 return ret;
2140         }
2141
2142         resp.events_reported = obj->uevent.events_reported;
2143         uverbs_uobject_put(uobj);
2144
2145         if (copy_to_user(u64_to_user_ptr(cmd.response), &resp, sizeof resp))
2146                 return -EFAULT;
2147
2148         return in_len;
2149 }
2150
2151 static void *alloc_wr(size_t wr_size, __u32 num_sge)
2152 {
2153         if (num_sge >= (U32_MAX - ALIGN(wr_size, sizeof (struct ib_sge))) /
2154                        sizeof (struct ib_sge))
2155                 return NULL;
2156
2157         return kmalloc(ALIGN(wr_size, sizeof (struct ib_sge)) +
2158                          num_sge * sizeof (struct ib_sge), GFP_KERNEL);
2159 }
2160
2161 ssize_t ib_uverbs_post_send(struct ib_uverbs_file *file,
2162                             struct ib_device *ib_dev,
2163                             const char __user *buf, int in_len,
2164                             int out_len)
2165 {
2166         struct ib_uverbs_post_send      cmd;
2167         struct ib_uverbs_post_send_resp resp;
2168         struct ib_uverbs_send_wr       *user_wr;
2169         struct ib_send_wr              *wr = NULL, *last, *next, *bad_wr;
2170         struct ib_qp                   *qp;
2171         int                             i, sg_ind;
2172         int                             is_ud;
2173         ssize_t                         ret = -EINVAL;
2174         size_t                          next_size;
2175
2176         if (copy_from_user(&cmd, buf, sizeof cmd))
2177                 return -EFAULT;
2178
2179         if (in_len < sizeof cmd + cmd.wqe_size * cmd.wr_count +
2180             cmd.sge_count * sizeof (struct ib_uverbs_sge))
2181                 return -EINVAL;
2182
2183         if (cmd.wqe_size < sizeof (struct ib_uverbs_send_wr))
2184                 return -EINVAL;
2185
2186         user_wr = kmalloc(cmd.wqe_size, GFP_KERNEL);
2187         if (!user_wr)
2188                 return -ENOMEM;
2189
2190         qp = uobj_get_obj_read(qp, UVERBS_OBJECT_QP, cmd.qp_handle, file->ucontext);
2191         if (!qp)
2192                 goto out;
2193
2194         is_ud = qp->qp_type == IB_QPT_UD;
2195         sg_ind = 0;
2196         last = NULL;
2197         for (i = 0; i < cmd.wr_count; ++i) {
2198                 if (copy_from_user(user_wr,
2199                                    buf + sizeof cmd + i * cmd.wqe_size,
2200                                    cmd.wqe_size)) {
2201                         ret = -EFAULT;
2202                         goto out_put;
2203                 }
2204
2205                 if (user_wr->num_sge + sg_ind > cmd.sge_count) {
2206                         ret = -EINVAL;
2207                         goto out_put;
2208                 }
2209
2210                 if (is_ud) {
2211                         struct ib_ud_wr *ud;
2212
2213                         if (user_wr->opcode != IB_WR_SEND &&
2214                             user_wr->opcode != IB_WR_SEND_WITH_IMM) {
2215                                 ret = -EINVAL;
2216                                 goto out_put;
2217                         }
2218
2219                         next_size = sizeof(*ud);
2220                         ud = alloc_wr(next_size, user_wr->num_sge);
2221                         if (!ud) {
2222                                 ret = -ENOMEM;
2223                                 goto out_put;
2224                         }
2225
2226                         ud->ah = uobj_get_obj_read(ah, UVERBS_OBJECT_AH, user_wr->wr.ud.ah,
2227                                                    file->ucontext);
2228                         if (!ud->ah) {
2229                                 kfree(ud);
2230                                 ret = -EINVAL;
2231                                 goto out_put;
2232                         }
2233                         ud->remote_qpn = user_wr->wr.ud.remote_qpn;
2234                         ud->remote_qkey = user_wr->wr.ud.remote_qkey;
2235
2236                         next = &ud->wr;
2237                 } else if (user_wr->opcode == IB_WR_RDMA_WRITE_WITH_IMM ||
2238                            user_wr->opcode == IB_WR_RDMA_WRITE ||
2239                            user_wr->opcode == IB_WR_RDMA_READ) {
2240                         struct ib_rdma_wr *rdma;
2241
2242                         next_size = sizeof(*rdma);
2243                         rdma = alloc_wr(next_size, user_wr->num_sge);
2244                         if (!rdma) {
2245                                 ret = -ENOMEM;
2246                                 goto out_put;
2247                         }
2248
2249                         rdma->remote_addr = user_wr->wr.rdma.remote_addr;
2250                         rdma->rkey = user_wr->wr.rdma.rkey;
2251
2252                         next = &rdma->wr;
2253                 } else if (user_wr->opcode == IB_WR_ATOMIC_CMP_AND_SWP ||
2254                            user_wr->opcode == IB_WR_ATOMIC_FETCH_AND_ADD) {
2255                         struct ib_atomic_wr *atomic;
2256
2257                         next_size = sizeof(*atomic);
2258                         atomic = alloc_wr(next_size, user_wr->num_sge);
2259                         if (!atomic) {
2260                                 ret = -ENOMEM;
2261                                 goto out_put;
2262                         }
2263
2264                         atomic->remote_addr = user_wr->wr.atomic.remote_addr;
2265                         atomic->compare_add = user_wr->wr.atomic.compare_add;
2266                         atomic->swap = user_wr->wr.atomic.swap;
2267                         atomic->rkey = user_wr->wr.atomic.rkey;
2268
2269                         next = &atomic->wr;
2270                 } else if (user_wr->opcode == IB_WR_SEND ||
2271                            user_wr->opcode == IB_WR_SEND_WITH_IMM ||
2272                            user_wr->opcode == IB_WR_SEND_WITH_INV) {
2273                         next_size = sizeof(*next);
2274                         next = alloc_wr(next_size, user_wr->num_sge);
2275                         if (!next) {
2276                                 ret = -ENOMEM;
2277                                 goto out_put;
2278                         }
2279                 } else {
2280                         ret = -EINVAL;
2281                         goto out_put;
2282                 }
2283
2284                 if (user_wr->opcode == IB_WR_SEND_WITH_IMM ||
2285                     user_wr->opcode == IB_WR_RDMA_WRITE_WITH_IMM) {
2286                         next->ex.imm_data =
2287                                         (__be32 __force) user_wr->ex.imm_data;
2288                 } else if (user_wr->opcode == IB_WR_SEND_WITH_INV) {
2289                         next->ex.invalidate_rkey = user_wr->ex.invalidate_rkey;
2290                 }
2291
2292                 if (!last)
2293                         wr = next;
2294                 else
2295                         last->next = next;
2296                 last = next;
2297
2298                 next->next       = NULL;
2299                 next->wr_id      = user_wr->wr_id;
2300                 next->num_sge    = user_wr->num_sge;
2301                 next->opcode     = user_wr->opcode;
2302                 next->send_flags = user_wr->send_flags;
2303
2304                 if (next->num_sge) {
2305                         next->sg_list = (void *) next +
2306                                 ALIGN(next_size, sizeof(struct ib_sge));
2307                         if (copy_from_user(next->sg_list,
2308                                            buf + sizeof cmd +
2309                                            cmd.wr_count * cmd.wqe_size +
2310                                            sg_ind * sizeof (struct ib_sge),
2311                                            next->num_sge * sizeof (struct ib_sge))) {
2312                                 ret = -EFAULT;
2313                                 goto out_put;
2314                         }
2315                         sg_ind += next->num_sge;
2316                 } else
2317                         next->sg_list = NULL;
2318         }
2319
2320         resp.bad_wr = 0;
2321         ret = qp->device->post_send(qp->real_qp, wr, &bad_wr);
2322         if (ret)
2323                 for (next = wr; next; next = next->next) {
2324                         ++resp.bad_wr;
2325                         if (next == bad_wr)
2326                                 break;
2327                 }
2328
2329         if (copy_to_user(u64_to_user_ptr(cmd.response), &resp, sizeof resp))
2330                 ret = -EFAULT;
2331
2332 out_put:
2333         uobj_put_obj_read(qp);
2334
2335         while (wr) {
2336                 if (is_ud && ud_wr(wr)->ah)
2337                         uobj_put_obj_read(ud_wr(wr)->ah);
2338                 next = wr->next;
2339                 kfree(wr);
2340                 wr = next;
2341         }
2342
2343 out:
2344         kfree(user_wr);
2345
2346         return ret ? ret : in_len;
2347 }
2348
2349 static struct ib_recv_wr *ib_uverbs_unmarshall_recv(const char __user *buf,
2350                                                     int in_len,
2351                                                     u32 wr_count,
2352                                                     u32 sge_count,
2353                                                     u32 wqe_size)
2354 {
2355         struct ib_uverbs_recv_wr *user_wr;
2356         struct ib_recv_wr        *wr = NULL, *last, *next;
2357         int                       sg_ind;
2358         int                       i;
2359         int                       ret;
2360
2361         if (in_len < wqe_size * wr_count +
2362             sge_count * sizeof (struct ib_uverbs_sge))
2363                 return ERR_PTR(-EINVAL);
2364
2365         if (wqe_size < sizeof (struct ib_uverbs_recv_wr))
2366                 return ERR_PTR(-EINVAL);
2367
2368         user_wr = kmalloc(wqe_size, GFP_KERNEL);
2369         if (!user_wr)
2370                 return ERR_PTR(-ENOMEM);
2371
2372         sg_ind = 0;
2373         last = NULL;
2374         for (i = 0; i < wr_count; ++i) {
2375                 if (copy_from_user(user_wr, buf + i * wqe_size,
2376                                    wqe_size)) {
2377                         ret = -EFAULT;
2378                         goto err;
2379                 }
2380
2381                 if (user_wr->num_sge + sg_ind > sge_count) {
2382                         ret = -EINVAL;
2383                         goto err;
2384                 }
2385
2386                 if (user_wr->num_sge >=
2387                     (U32_MAX - ALIGN(sizeof *next, sizeof (struct ib_sge))) /
2388                     sizeof (struct ib_sge)) {
2389                         ret = -EINVAL;
2390                         goto err;
2391                 }
2392
2393                 next = kmalloc(ALIGN(sizeof *next, sizeof (struct ib_sge)) +
2394                                user_wr->num_sge * sizeof (struct ib_sge),
2395                                GFP_KERNEL);
2396                 if (!next) {
2397                         ret = -ENOMEM;
2398                         goto err;
2399                 }
2400
2401                 if (!last)
2402                         wr = next;
2403                 else
2404                         last->next = next;
2405                 last = next;
2406
2407                 next->next       = NULL;
2408                 next->wr_id      = user_wr->wr_id;
2409                 next->num_sge    = user_wr->num_sge;
2410
2411                 if (next->num_sge) {
2412                         next->sg_list = (void *) next +
2413                                 ALIGN(sizeof *next, sizeof (struct ib_sge));
2414                         if (copy_from_user(next->sg_list,
2415                                            buf + wr_count * wqe_size +
2416                                            sg_ind * sizeof (struct ib_sge),
2417                                            next->num_sge * sizeof (struct ib_sge))) {
2418                                 ret = -EFAULT;
2419                                 goto err;
2420                         }
2421                         sg_ind += next->num_sge;
2422                 } else
2423                         next->sg_list = NULL;
2424         }
2425
2426         kfree(user_wr);
2427         return wr;
2428
2429 err:
2430         kfree(user_wr);
2431
2432         while (wr) {
2433                 next = wr->next;
2434                 kfree(wr);
2435                 wr = next;
2436         }
2437
2438         return ERR_PTR(ret);
2439 }
2440
2441 ssize_t ib_uverbs_post_recv(struct ib_uverbs_file *file,
2442                             struct ib_device *ib_dev,
2443                             const char __user *buf, int in_len,
2444                             int out_len)
2445 {
2446         struct ib_uverbs_post_recv      cmd;
2447         struct ib_uverbs_post_recv_resp resp;
2448         struct ib_recv_wr              *wr, *next, *bad_wr;
2449         struct ib_qp                   *qp;
2450         ssize_t                         ret = -EINVAL;
2451
2452         if (copy_from_user(&cmd, buf, sizeof cmd))
2453                 return -EFAULT;
2454
2455         wr = ib_uverbs_unmarshall_recv(buf + sizeof cmd,
2456                                        in_len - sizeof cmd, cmd.wr_count,
2457                                        cmd.sge_count, cmd.wqe_size);
2458         if (IS_ERR(wr))
2459                 return PTR_ERR(wr);
2460
2461         qp = uobj_get_obj_read(qp, UVERBS_OBJECT_QP, cmd.qp_handle, file->ucontext);
2462         if (!qp)
2463                 goto out;
2464
2465         resp.bad_wr = 0;
2466         ret = qp->device->post_recv(qp->real_qp, wr, &bad_wr);
2467
2468         uobj_put_obj_read(qp);
2469         if (ret) {
2470                 for (next = wr; next; next = next->next) {
2471                         ++resp.bad_wr;
2472                         if (next == bad_wr)
2473                                 break;
2474                 }
2475         }
2476
2477         if (copy_to_user(u64_to_user_ptr(cmd.response), &resp, sizeof resp))
2478                 ret = -EFAULT;
2479
2480 out:
2481         while (wr) {
2482                 next = wr->next;
2483                 kfree(wr);
2484                 wr = next;
2485         }
2486
2487         return ret ? ret : in_len;
2488 }
2489
2490 ssize_t ib_uverbs_post_srq_recv(struct ib_uverbs_file *file,
2491                                 struct ib_device *ib_dev,
2492                                 const char __user *buf, int in_len,
2493                                 int out_len)
2494 {
2495         struct ib_uverbs_post_srq_recv      cmd;
2496         struct ib_uverbs_post_srq_recv_resp resp;
2497         struct ib_recv_wr                  *wr, *next, *bad_wr;
2498         struct ib_srq                      *srq;
2499         ssize_t                             ret = -EINVAL;
2500
2501         if (copy_from_user(&cmd, buf, sizeof cmd))
2502                 return -EFAULT;
2503
2504         wr = ib_uverbs_unmarshall_recv(buf + sizeof cmd,
2505                                        in_len - sizeof cmd, cmd.wr_count,
2506                                        cmd.sge_count, cmd.wqe_size);
2507         if (IS_ERR(wr))
2508                 return PTR_ERR(wr);
2509
2510         srq = uobj_get_obj_read(srq, UVERBS_OBJECT_SRQ, cmd.srq_handle, file->ucontext);
2511         if (!srq)
2512                 goto out;
2513
2514         resp.bad_wr = 0;
2515         ret = srq->device->post_srq_recv(srq, wr, &bad_wr);
2516
2517         uobj_put_obj_read(srq);
2518
2519         if (ret)
2520                 for (next = wr; next; next = next->next) {
2521                         ++resp.bad_wr;
2522                         if (next == bad_wr)
2523                                 break;
2524                 }
2525
2526         if (copy_to_user(u64_to_user_ptr(cmd.response), &resp, sizeof resp))
2527                 ret = -EFAULT;
2528
2529 out:
2530         while (wr) {
2531                 next = wr->next;
2532                 kfree(wr);
2533                 wr = next;
2534         }
2535
2536         return ret ? ret : in_len;
2537 }
2538
2539 ssize_t ib_uverbs_create_ah(struct ib_uverbs_file *file,
2540                             struct ib_device *ib_dev,
2541                             const char __user *buf, int in_len,
2542                             int out_len)
2543 {
2544         struct ib_uverbs_create_ah       cmd;
2545         struct ib_uverbs_create_ah_resp  resp;
2546         struct ib_uobject               *uobj;
2547         struct ib_pd                    *pd;
2548         struct ib_ah                    *ah;
2549         struct rdma_ah_attr             attr;
2550         int ret;
2551         struct ib_udata                   udata;
2552
2553         if (out_len < sizeof resp)
2554                 return -ENOSPC;
2555
2556         if (copy_from_user(&cmd, buf, sizeof cmd))
2557                 return -EFAULT;
2558
2559         if (!rdma_is_port_valid(ib_dev, cmd.attr.port_num))
2560                 return -EINVAL;
2561
2562         ib_uverbs_init_udata(&udata, buf + sizeof(cmd),
2563                    u64_to_user_ptr(cmd.response) + sizeof(resp),
2564                    in_len - sizeof(cmd) - sizeof(struct ib_uverbs_cmd_hdr),
2565                    out_len - sizeof(resp));
2566
2567         uobj  = uobj_alloc(UVERBS_OBJECT_AH, file->ucontext);
2568         if (IS_ERR(uobj))
2569                 return PTR_ERR(uobj);
2570
2571         pd = uobj_get_obj_read(pd, UVERBS_OBJECT_PD, cmd.pd_handle, file->ucontext);
2572         if (!pd) {
2573                 ret = -EINVAL;
2574                 goto err;
2575         }
2576
2577         attr.type = rdma_ah_find_type(ib_dev, cmd.attr.port_num);
2578         rdma_ah_set_make_grd(&attr, false);
2579         rdma_ah_set_dlid(&attr, cmd.attr.dlid);
2580         rdma_ah_set_sl(&attr, cmd.attr.sl);
2581         rdma_ah_set_path_bits(&attr, cmd.attr.src_path_bits);
2582         rdma_ah_set_static_rate(&attr, cmd.attr.static_rate);
2583         rdma_ah_set_port_num(&attr, cmd.attr.port_num);
2584
2585         if (cmd.attr.is_global) {
2586                 rdma_ah_set_grh(&attr, NULL, cmd.attr.grh.flow_label,
2587                                 cmd.attr.grh.sgid_index,
2588                                 cmd.attr.grh.hop_limit,
2589                                 cmd.attr.grh.traffic_class);
2590                 rdma_ah_set_dgid_raw(&attr, cmd.attr.grh.dgid);
2591         } else {
2592                 rdma_ah_set_ah_flags(&attr, 0);
2593         }
2594
2595         ah = rdma_create_user_ah(pd, &attr, &udata);
2596         if (IS_ERR(ah)) {
2597                 ret = PTR_ERR(ah);
2598                 goto err_put;
2599         }
2600
2601         ah->uobject  = uobj;
2602         uobj->user_handle = cmd.user_handle;
2603         uobj->object = ah;
2604
2605         resp.ah_handle = uobj->id;
2606
2607         if (copy_to_user(u64_to_user_ptr(cmd.response), &resp, sizeof resp)) {
2608                 ret = -EFAULT;
2609                 goto err_copy;
2610         }
2611
2612         uobj_put_obj_read(pd);
2613         uobj_alloc_commit(uobj);
2614
2615         return in_len;
2616
2617 err_copy:
2618         rdma_destroy_ah(ah);
2619
2620 err_put:
2621         uobj_put_obj_read(pd);
2622
2623 err:
2624         uobj_alloc_abort(uobj);
2625         return ret;
2626 }
2627
2628 ssize_t ib_uverbs_destroy_ah(struct ib_uverbs_file *file,
2629                              struct ib_device *ib_dev,
2630                              const char __user *buf, int in_len, int out_len)
2631 {
2632         struct ib_uverbs_destroy_ah cmd;
2633         struct ib_uobject          *uobj;
2634         int                         ret;
2635
2636         if (copy_from_user(&cmd, buf, sizeof cmd))
2637                 return -EFAULT;
2638
2639         uobj  = uobj_get_write(UVERBS_OBJECT_AH, cmd.ah_handle,
2640                                file->ucontext);
2641         if (IS_ERR(uobj))
2642                 return PTR_ERR(uobj);
2643
2644         ret = uobj_remove_commit(uobj);
2645         return ret ?: in_len;
2646 }
2647
2648 ssize_t ib_uverbs_attach_mcast(struct ib_uverbs_file *file,
2649                                struct ib_device *ib_dev,
2650                                const char __user *buf, int in_len,
2651                                int out_len)
2652 {
2653         struct ib_uverbs_attach_mcast cmd;
2654         struct ib_qp                 *qp;
2655         struct ib_uqp_object         *obj;
2656         struct ib_uverbs_mcast_entry *mcast;
2657         int                           ret;
2658
2659         if (copy_from_user(&cmd, buf, sizeof cmd))
2660                 return -EFAULT;
2661
2662         qp = uobj_get_obj_read(qp, UVERBS_OBJECT_QP, cmd.qp_handle, file->ucontext);
2663         if (!qp)
2664                 return -EINVAL;
2665
2666         obj = container_of(qp->uobject, struct ib_uqp_object, uevent.uobject);
2667
2668         mutex_lock(&obj->mcast_lock);
2669         list_for_each_entry(mcast, &obj->mcast_list, list)
2670                 if (cmd.mlid == mcast->lid &&
2671                     !memcmp(cmd.gid, mcast->gid.raw, sizeof mcast->gid.raw)) {
2672                         ret = 0;
2673                         goto out_put;
2674                 }
2675
2676         mcast = kmalloc(sizeof *mcast, GFP_KERNEL);
2677         if (!mcast) {
2678                 ret = -ENOMEM;
2679                 goto out_put;
2680         }
2681
2682         mcast->lid = cmd.mlid;
2683         memcpy(mcast->gid.raw, cmd.gid, sizeof mcast->gid.raw);
2684
2685         ret = ib_attach_mcast(qp, &mcast->gid, cmd.mlid);
2686         if (!ret)
2687                 list_add_tail(&mcast->list, &obj->mcast_list);
2688         else
2689                 kfree(mcast);
2690
2691 out_put:
2692         mutex_unlock(&obj->mcast_lock);
2693         uobj_put_obj_read(qp);
2694
2695         return ret ? ret : in_len;
2696 }
2697
2698 ssize_t ib_uverbs_detach_mcast(struct ib_uverbs_file *file,
2699                                struct ib_device *ib_dev,
2700                                const char __user *buf, int in_len,
2701                                int out_len)
2702 {
2703         struct ib_uverbs_detach_mcast cmd;
2704         struct ib_uqp_object         *obj;
2705         struct ib_qp                 *qp;
2706         struct ib_uverbs_mcast_entry *mcast;
2707         int                           ret = -EINVAL;
2708         bool                          found = false;
2709
2710         if (copy_from_user(&cmd, buf, sizeof cmd))
2711                 return -EFAULT;
2712
2713         qp = uobj_get_obj_read(qp, UVERBS_OBJECT_QP, cmd.qp_handle, file->ucontext);
2714         if (!qp)
2715                 return -EINVAL;
2716
2717         obj = container_of(qp->uobject, struct ib_uqp_object, uevent.uobject);
2718         mutex_lock(&obj->mcast_lock);
2719
2720         list_for_each_entry(mcast, &obj->mcast_list, list)
2721                 if (cmd.mlid == mcast->lid &&
2722                     !memcmp(cmd.gid, mcast->gid.raw, sizeof mcast->gid.raw)) {
2723                         list_del(&mcast->list);
2724                         kfree(mcast);
2725                         found = true;
2726                         break;
2727                 }
2728
2729         if (!found) {
2730                 ret = -EINVAL;
2731                 goto out_put;
2732         }
2733
2734         ret = ib_detach_mcast(qp, (union ib_gid *)cmd.gid, cmd.mlid);
2735
2736 out_put:
2737         mutex_unlock(&obj->mcast_lock);
2738         uobj_put_obj_read(qp);
2739         return ret ? ret : in_len;
2740 }
2741
2742 struct ib_uflow_resources {
2743         size_t                  max;
2744         size_t                  num;
2745         struct ib_flow_action   *collection[0];
2746 };
2747
2748 static struct ib_uflow_resources *flow_resources_alloc(size_t num_specs)
2749 {
2750         struct ib_uflow_resources *resources;
2751
2752         resources =
2753                 kmalloc(sizeof(*resources) +
2754                         num_specs * sizeof(*resources->collection), GFP_KERNEL);
2755
2756         if (!resources)
2757                 return NULL;
2758
2759         resources->num = 0;
2760         resources->max = num_specs;
2761
2762         return resources;
2763 }
2764
2765 void ib_uverbs_flow_resources_free(struct ib_uflow_resources *uflow_res)
2766 {
2767         unsigned int i;
2768
2769         for (i = 0; i < uflow_res->num; i++)
2770                 atomic_dec(&uflow_res->collection[i]->usecnt);
2771
2772         kfree(uflow_res);
2773 }
2774
2775 static void flow_resources_add(struct ib_uflow_resources *uflow_res,
2776                                struct ib_flow_action *action)
2777 {
2778         WARN_ON(uflow_res->num >= uflow_res->max);
2779
2780         atomic_inc(&action->usecnt);
2781         uflow_res->collection[uflow_res->num++] = action;
2782 }
2783
2784 static int kern_spec_to_ib_spec_action(struct ib_ucontext *ucontext,
2785                                        struct ib_uverbs_flow_spec *kern_spec,
2786                                        union ib_flow_spec *ib_spec,
2787                                        struct ib_uflow_resources *uflow_res)
2788 {
2789         ib_spec->type = kern_spec->type;
2790         switch (ib_spec->type) {
2791         case IB_FLOW_SPEC_ACTION_TAG:
2792                 if (kern_spec->flow_tag.size !=
2793                     sizeof(struct ib_uverbs_flow_spec_action_tag))
2794                         return -EINVAL;
2795
2796                 ib_spec->flow_tag.size = sizeof(struct ib_flow_spec_action_tag);
2797                 ib_spec->flow_tag.tag_id = kern_spec->flow_tag.tag_id;
2798                 break;
2799         case IB_FLOW_SPEC_ACTION_DROP:
2800                 if (kern_spec->drop.size !=
2801                     sizeof(struct ib_uverbs_flow_spec_action_drop))
2802                         return -EINVAL;
2803
2804                 ib_spec->drop.size = sizeof(struct ib_flow_spec_action_drop);
2805                 break;
2806         case IB_FLOW_SPEC_ACTION_HANDLE:
2807                 if (kern_spec->action.size !=
2808                     sizeof(struct ib_uverbs_flow_spec_action_handle))
2809                         return -EOPNOTSUPP;
2810                 ib_spec->action.act = uobj_get_obj_read(flow_action,
2811                                                         UVERBS_OBJECT_FLOW_ACTION,
2812                                                         kern_spec->action.handle,
2813                                                         ucontext);
2814                 if (!ib_spec->action.act)
2815                         return -EINVAL;
2816                 ib_spec->action.size =
2817                         sizeof(struct ib_flow_spec_action_handle);
2818                 flow_resources_add(uflow_res, ib_spec->action.act);
2819                 uobj_put_obj_read(ib_spec->action.act);
2820                 break;
2821         default:
2822                 return -EINVAL;
2823         }
2824         return 0;
2825 }
2826
2827 static size_t kern_spec_filter_sz(const struct ib_uverbs_flow_spec_hdr *spec)
2828 {
2829         /* Returns user space filter size, includes padding */
2830         return (spec->size - sizeof(struct ib_uverbs_flow_spec_hdr)) / 2;
2831 }
2832
2833 static ssize_t spec_filter_size(const void *kern_spec_filter, u16 kern_filter_size,
2834                                 u16 ib_real_filter_sz)
2835 {
2836         /*
2837          * User space filter structures must be 64 bit aligned, otherwise this
2838          * may pass, but we won't handle additional new attributes.
2839          */
2840
2841         if (kern_filter_size > ib_real_filter_sz) {
2842                 if (memchr_inv(kern_spec_filter +
2843                                ib_real_filter_sz, 0,
2844                                kern_filter_size - ib_real_filter_sz))
2845                         return -EINVAL;
2846                 return ib_real_filter_sz;
2847         }
2848         return kern_filter_size;
2849 }
2850
2851 int ib_uverbs_kern_spec_to_ib_spec_filter(enum ib_flow_spec_type type,
2852                                           const void *kern_spec_mask,
2853                                           const void *kern_spec_val,
2854                                           size_t kern_filter_sz,
2855                                           union ib_flow_spec *ib_spec)
2856 {
2857         ssize_t actual_filter_sz;
2858         ssize_t ib_filter_sz;
2859
2860         /* User flow spec size must be aligned to 4 bytes */
2861         if (kern_filter_sz != ALIGN(kern_filter_sz, 4))
2862                 return -EINVAL;
2863
2864         ib_spec->type = type;
2865
2866         if (ib_spec->type == (IB_FLOW_SPEC_INNER | IB_FLOW_SPEC_VXLAN_TUNNEL))
2867                 return -EINVAL;
2868
2869         switch (ib_spec->type & ~IB_FLOW_SPEC_INNER) {
2870         case IB_FLOW_SPEC_ETH:
2871                 ib_filter_sz = offsetof(struct ib_flow_eth_filter, real_sz);
2872                 actual_filter_sz = spec_filter_size(kern_spec_mask,
2873                                                     kern_filter_sz,
2874                                                     ib_filter_sz);
2875                 if (actual_filter_sz <= 0)
2876                         return -EINVAL;
2877                 ib_spec->size = sizeof(struct ib_flow_spec_eth);
2878                 memcpy(&ib_spec->eth.val, kern_spec_val, actual_filter_sz);
2879                 memcpy(&ib_spec->eth.mask, kern_spec_mask, actual_filter_sz);
2880                 break;
2881         case IB_FLOW_SPEC_IPV4:
2882                 ib_filter_sz = offsetof(struct ib_flow_ipv4_filter, real_sz);
2883                 actual_filter_sz = spec_filter_size(kern_spec_mask,
2884                                                     kern_filter_sz,
2885                                                     ib_filter_sz);
2886                 if (actual_filter_sz <= 0)
2887                         return -EINVAL;
2888                 ib_spec->size = sizeof(struct ib_flow_spec_ipv4);
2889                 memcpy(&ib_spec->ipv4.val, kern_spec_val, actual_filter_sz);
2890                 memcpy(&ib_spec->ipv4.mask, kern_spec_mask, actual_filter_sz);
2891                 break;
2892         case IB_FLOW_SPEC_IPV6:
2893                 ib_filter_sz = offsetof(struct ib_flow_ipv6_filter, real_sz);
2894                 actual_filter_sz = spec_filter_size(kern_spec_mask,
2895                                                     kern_filter_sz,
2896                                                     ib_filter_sz);
2897                 if (actual_filter_sz <= 0)
2898                         return -EINVAL;
2899                 ib_spec->size = sizeof(struct ib_flow_spec_ipv6);
2900                 memcpy(&ib_spec->ipv6.val, kern_spec_val, actual_filter_sz);
2901                 memcpy(&ib_spec->ipv6.mask, kern_spec_mask, actual_filter_sz);
2902
2903                 if ((ntohl(ib_spec->ipv6.mask.flow_label)) >= BIT(20) ||
2904                     (ntohl(ib_spec->ipv6.val.flow_label)) >= BIT(20))
2905                         return -EINVAL;
2906                 break;
2907         case IB_FLOW_SPEC_TCP:
2908         case IB_FLOW_SPEC_UDP:
2909                 ib_filter_sz = offsetof(struct ib_flow_tcp_udp_filter, real_sz);
2910                 actual_filter_sz = spec_filter_size(kern_spec_mask,
2911                                                     kern_filter_sz,
2912                                                     ib_filter_sz);
2913                 if (actual_filter_sz <= 0)
2914                         return -EINVAL;
2915                 ib_spec->size = sizeof(struct ib_flow_spec_tcp_udp);
2916                 memcpy(&ib_spec->tcp_udp.val, kern_spec_val, actual_filter_sz);
2917                 memcpy(&ib_spec->tcp_udp.mask, kern_spec_mask, actual_filter_sz);
2918                 break;
2919         case IB_FLOW_SPEC_VXLAN_TUNNEL:
2920                 ib_filter_sz = offsetof(struct ib_flow_tunnel_filter, real_sz);
2921                 actual_filter_sz = spec_filter_size(kern_spec_mask,
2922                                                     kern_filter_sz,
2923                                                     ib_filter_sz);
2924                 if (actual_filter_sz <= 0)
2925                         return -EINVAL;
2926                 ib_spec->tunnel.size = sizeof(struct ib_flow_spec_tunnel);
2927                 memcpy(&ib_spec->tunnel.val, kern_spec_val, actual_filter_sz);
2928                 memcpy(&ib_spec->tunnel.mask, kern_spec_mask, actual_filter_sz);
2929
2930                 if ((ntohl(ib_spec->tunnel.mask.tunnel_id)) >= BIT(24) ||
2931                     (ntohl(ib_spec->tunnel.val.tunnel_id)) >= BIT(24))
2932                         return -EINVAL;
2933                 break;
2934         case IB_FLOW_SPEC_ESP:
2935                 ib_filter_sz = offsetof(struct ib_flow_esp_filter, real_sz);
2936                 actual_filter_sz = spec_filter_size(kern_spec_mask,
2937                                                     kern_filter_sz,
2938                                                     ib_filter_sz);
2939                 if (actual_filter_sz <= 0)
2940                         return -EINVAL;
2941                 ib_spec->esp.size = sizeof(struct ib_flow_spec_esp);
2942                 memcpy(&ib_spec->esp.val, kern_spec_val, actual_filter_sz);
2943                 memcpy(&ib_spec->esp.mask, kern_spec_mask, actual_filter_sz);
2944                 break;
2945         default:
2946                 return -EINVAL;
2947         }
2948         return 0;
2949 }
2950
2951 static int kern_spec_to_ib_spec_filter(struct ib_uverbs_flow_spec *kern_spec,
2952                                        union ib_flow_spec *ib_spec)
2953 {
2954         ssize_t kern_filter_sz;
2955         void *kern_spec_mask;
2956         void *kern_spec_val;
2957
2958         if (kern_spec->reserved)
2959                 return -EINVAL;
2960
2961         kern_filter_sz = kern_spec_filter_sz(&kern_spec->hdr);
2962
2963         kern_spec_val = (void *)kern_spec +
2964                 sizeof(struct ib_uverbs_flow_spec_hdr);
2965         kern_spec_mask = kern_spec_val + kern_filter_sz;
2966
2967         return ib_uverbs_kern_spec_to_ib_spec_filter(kern_spec->type,
2968                                                      kern_spec_mask,
2969                                                      kern_spec_val,
2970                                                      kern_filter_sz, ib_spec);
2971 }
2972
2973 static int kern_spec_to_ib_spec(struct ib_ucontext *ucontext,
2974                                 struct ib_uverbs_flow_spec *kern_spec,
2975                                 union ib_flow_spec *ib_spec,
2976                                 struct ib_uflow_resources *uflow_res)
2977 {
2978         if (kern_spec->reserved)
2979                 return -EINVAL;
2980
2981         if (kern_spec->type >= IB_FLOW_SPEC_ACTION_TAG)
2982                 return kern_spec_to_ib_spec_action(ucontext, kern_spec, ib_spec,
2983                                                    uflow_res);
2984         else
2985                 return kern_spec_to_ib_spec_filter(kern_spec, ib_spec);
2986 }
2987
2988 int ib_uverbs_ex_create_wq(struct ib_uverbs_file *file,
2989                            struct ib_device *ib_dev,
2990                            struct ib_udata *ucore,
2991                            struct ib_udata *uhw)
2992 {
2993         struct ib_uverbs_ex_create_wq     cmd = {};
2994         struct ib_uverbs_ex_create_wq_resp resp = {};
2995         struct ib_uwq_object           *obj;
2996         int err = 0;
2997         struct ib_cq *cq;
2998         struct ib_pd *pd;
2999         struct ib_wq *wq;
3000         struct ib_wq_init_attr wq_init_attr = {};
3001         size_t required_cmd_sz;
3002         size_t required_resp_len;
3003
3004         required_cmd_sz = offsetof(typeof(cmd), max_sge) + sizeof(cmd.max_sge);
3005         required_resp_len = offsetof(typeof(resp), wqn) + sizeof(resp.wqn);
3006
3007         if (ucore->inlen < required_cmd_sz)
3008                 return -EINVAL;
3009
3010         if (ucore->outlen < required_resp_len)
3011                 return -ENOSPC;
3012
3013         if (ucore->inlen > sizeof(cmd) &&
3014             !ib_is_udata_cleared(ucore, sizeof(cmd),
3015                                  ucore->inlen - sizeof(cmd)))
3016                 return -EOPNOTSUPP;
3017
3018         err = ib_copy_from_udata(&cmd, ucore, min(sizeof(cmd), ucore->inlen));
3019         if (err)
3020                 return err;
3021
3022         if (cmd.comp_mask)
3023                 return -EOPNOTSUPP;
3024
3025         obj  = (struct ib_uwq_object *)uobj_alloc(UVERBS_OBJECT_WQ,
3026                                                   file->ucontext);
3027         if (IS_ERR(obj))
3028                 return PTR_ERR(obj);
3029
3030         pd  = uobj_get_obj_read(pd, UVERBS_OBJECT_PD, cmd.pd_handle, file->ucontext);
3031         if (!pd) {
3032                 err = -EINVAL;
3033                 goto err_uobj;
3034         }
3035
3036         cq = uobj_get_obj_read(cq, UVERBS_OBJECT_CQ, cmd.cq_handle, file->ucontext);
3037         if (!cq) {
3038                 err = -EINVAL;
3039                 goto err_put_pd;
3040         }
3041
3042         wq_init_attr.cq = cq;
3043         wq_init_attr.max_sge = cmd.max_sge;
3044         wq_init_attr.max_wr = cmd.max_wr;
3045         wq_init_attr.wq_context = file;
3046         wq_init_attr.wq_type = cmd.wq_type;
3047         wq_init_attr.event_handler = ib_uverbs_wq_event_handler;
3048         if (ucore->inlen >= (offsetof(typeof(cmd), create_flags) +
3049                              sizeof(cmd.create_flags)))
3050                 wq_init_attr.create_flags = cmd.create_flags;
3051         obj->uevent.events_reported = 0;
3052         INIT_LIST_HEAD(&obj->uevent.event_list);
3053
3054         if (!pd->device->create_wq) {
3055                 err = -EOPNOTSUPP;
3056                 goto err_put_cq;
3057         }
3058         wq = pd->device->create_wq(pd, &wq_init_attr, uhw);
3059         if (IS_ERR(wq)) {
3060                 err = PTR_ERR(wq);
3061                 goto err_put_cq;
3062         }
3063
3064         wq->uobject = &obj->uevent.uobject;
3065         obj->uevent.uobject.object = wq;
3066         wq->wq_type = wq_init_attr.wq_type;
3067         wq->cq = cq;
3068         wq->pd = pd;
3069         wq->device = pd->device;
3070         wq->wq_context = wq_init_attr.wq_context;
3071         atomic_set(&wq->usecnt, 0);
3072         atomic_inc(&pd->usecnt);
3073         atomic_inc(&cq->usecnt);
3074         wq->uobject = &obj->uevent.uobject;
3075         obj->uevent.uobject.object = wq;
3076
3077         memset(&resp, 0, sizeof(resp));
3078         resp.wq_handle = obj->uevent.uobject.id;
3079         resp.max_sge = wq_init_attr.max_sge;
3080         resp.max_wr = wq_init_attr.max_wr;
3081         resp.wqn = wq->wq_num;
3082         resp.response_length = required_resp_len;
3083         err = ib_copy_to_udata(ucore,
3084                                &resp, resp.response_length);
3085         if (err)
3086                 goto err_copy;
3087
3088         uobj_put_obj_read(pd);
3089         uobj_put_obj_read(cq);
3090         uobj_alloc_commit(&obj->uevent.uobject);
3091         return 0;
3092
3093 err_copy:
3094         ib_destroy_wq(wq);
3095 err_put_cq:
3096         uobj_put_obj_read(cq);
3097 err_put_pd:
3098         uobj_put_obj_read(pd);
3099 err_uobj:
3100         uobj_alloc_abort(&obj->uevent.uobject);
3101
3102         return err;
3103 }
3104
3105 int ib_uverbs_ex_destroy_wq(struct ib_uverbs_file *file,
3106                             struct ib_device *ib_dev,
3107                             struct ib_udata *ucore,
3108                             struct ib_udata *uhw)
3109 {
3110         struct ib_uverbs_ex_destroy_wq  cmd = {};
3111         struct ib_uverbs_ex_destroy_wq_resp     resp = {};
3112         struct ib_uobject               *uobj;
3113         struct ib_uwq_object            *obj;
3114         size_t required_cmd_sz;
3115         size_t required_resp_len;
3116         int                             ret;
3117
3118         required_cmd_sz = offsetof(typeof(cmd), wq_handle) + sizeof(cmd.wq_handle);
3119         required_resp_len = offsetof(typeof(resp), reserved) + sizeof(resp.reserved);
3120
3121         if (ucore->inlen < required_cmd_sz)
3122                 return -EINVAL;
3123
3124         if (ucore->outlen < required_resp_len)
3125                 return -ENOSPC;
3126
3127         if (ucore->inlen > sizeof(cmd) &&
3128             !ib_is_udata_cleared(ucore, sizeof(cmd),
3129                                  ucore->inlen - sizeof(cmd)))
3130                 return -EOPNOTSUPP;
3131
3132         ret = ib_copy_from_udata(&cmd, ucore, min(sizeof(cmd), ucore->inlen));
3133         if (ret)
3134                 return ret;
3135
3136         if (cmd.comp_mask)
3137                 return -EOPNOTSUPP;
3138
3139         resp.response_length = required_resp_len;
3140         uobj  = uobj_get_write(UVERBS_OBJECT_WQ, cmd.wq_handle,
3141                                file->ucontext);
3142         if (IS_ERR(uobj))
3143                 return PTR_ERR(uobj);
3144
3145         obj = container_of(uobj, struct ib_uwq_object, uevent.uobject);
3146         /*
3147          * Make sure we don't free the memory in remove_commit as we still
3148          * needs the uobject memory to create the response.
3149          */
3150         uverbs_uobject_get(uobj);
3151
3152         ret = uobj_remove_commit(uobj);
3153         resp.events_reported = obj->uevent.events_reported;
3154         uverbs_uobject_put(uobj);
3155         if (ret)
3156                 return ret;
3157
3158         return ib_copy_to_udata(ucore, &resp, resp.response_length);
3159 }
3160
3161 int ib_uverbs_ex_modify_wq(struct ib_uverbs_file *file,
3162                            struct ib_device *ib_dev,
3163                            struct ib_udata *ucore,
3164