Merge tag 'mailbox-v4.17' of git://git.linaro.org/landing-teams/working/fujitsu/integ...
[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(uobj_get_type(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(uobj_get_type(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(uobj_get_type(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(uobj_get_type(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(uobj_get_type(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(uobj_get_type(mr), file->ucontext);
667         if (IS_ERR(uobj))
668                 return PTR_ERR(uobj);
669
670         pd = uobj_get_obj_read(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
697         uobj->object = mr;
698
699         memset(&resp, 0, sizeof resp);
700         resp.lkey      = mr->lkey;
701         resp.rkey      = mr->rkey;
702         resp.mr_handle = uobj->id;
703
704         if (copy_to_user(u64_to_user_ptr(cmd.response), &resp, sizeof resp)) {
705                 ret = -EFAULT;
706                 goto err_copy;
707         }
708
709         uobj_put_obj_read(pd);
710
711         uobj_alloc_commit(uobj);
712
713         return in_len;
714
715 err_copy:
716         ib_dereg_mr(mr);
717
718 err_put:
719         uobj_put_obj_read(pd);
720
721 err_free:
722         uobj_alloc_abort(uobj);
723         return ret;
724 }
725
726 ssize_t ib_uverbs_rereg_mr(struct ib_uverbs_file *file,
727                            struct ib_device *ib_dev,
728                            const char __user *buf, int in_len,
729                            int out_len)
730 {
731         struct ib_uverbs_rereg_mr      cmd;
732         struct ib_uverbs_rereg_mr_resp resp;
733         struct ib_udata              udata;
734         struct ib_pd                *pd = NULL;
735         struct ib_mr                *mr;
736         struct ib_pd                *old_pd;
737         int                          ret;
738         struct ib_uobject           *uobj;
739
740         if (out_len < sizeof(resp))
741                 return -ENOSPC;
742
743         if (copy_from_user(&cmd, buf, sizeof(cmd)))
744                 return -EFAULT;
745
746         ib_uverbs_init_udata(&udata, buf + sizeof(cmd),
747                    u64_to_user_ptr(cmd.response) + sizeof(resp),
748                    in_len - sizeof(cmd) - sizeof(struct ib_uverbs_cmd_hdr),
749                    out_len - sizeof(resp));
750
751         if (cmd.flags & ~IB_MR_REREG_SUPPORTED || !cmd.flags)
752                 return -EINVAL;
753
754         if ((cmd.flags & IB_MR_REREG_TRANS) &&
755             (!cmd.start || !cmd.hca_va || 0 >= cmd.length ||
756              (cmd.start & ~PAGE_MASK) != (cmd.hca_va & ~PAGE_MASK)))
757                         return -EINVAL;
758
759         uobj  = uobj_get_write(uobj_get_type(mr), cmd.mr_handle,
760                                file->ucontext);
761         if (IS_ERR(uobj))
762                 return PTR_ERR(uobj);
763
764         mr = uobj->object;
765
766         if (cmd.flags & IB_MR_REREG_ACCESS) {
767                 ret = ib_check_mr_access(cmd.access_flags);
768                 if (ret)
769                         goto put_uobjs;
770         }
771
772         if (cmd.flags & IB_MR_REREG_PD) {
773                 pd = uobj_get_obj_read(pd, cmd.pd_handle, file->ucontext);
774                 if (!pd) {
775                         ret = -EINVAL;
776                         goto put_uobjs;
777                 }
778         }
779
780         old_pd = mr->pd;
781         ret = mr->device->rereg_user_mr(mr, cmd.flags, cmd.start,
782                                         cmd.length, cmd.hca_va,
783                                         cmd.access_flags, pd, &udata);
784         if (!ret) {
785                 if (cmd.flags & IB_MR_REREG_PD) {
786                         atomic_inc(&pd->usecnt);
787                         mr->pd = pd;
788                         atomic_dec(&old_pd->usecnt);
789                 }
790         } else {
791                 goto put_uobj_pd;
792         }
793
794         memset(&resp, 0, sizeof(resp));
795         resp.lkey      = mr->lkey;
796         resp.rkey      = mr->rkey;
797
798         if (copy_to_user(u64_to_user_ptr(cmd.response), &resp, sizeof(resp)))
799                 ret = -EFAULT;
800         else
801                 ret = in_len;
802
803 put_uobj_pd:
804         if (cmd.flags & IB_MR_REREG_PD)
805                 uobj_put_obj_read(pd);
806
807 put_uobjs:
808         uobj_put_write(uobj);
809
810         return ret;
811 }
812
813 ssize_t ib_uverbs_dereg_mr(struct ib_uverbs_file *file,
814                            struct ib_device *ib_dev,
815                            const char __user *buf, int in_len,
816                            int out_len)
817 {
818         struct ib_uverbs_dereg_mr cmd;
819         struct ib_uobject        *uobj;
820         int                       ret = -EINVAL;
821
822         if (copy_from_user(&cmd, buf, sizeof cmd))
823                 return -EFAULT;
824
825         uobj  = uobj_get_write(uobj_get_type(mr), cmd.mr_handle,
826                                file->ucontext);
827         if (IS_ERR(uobj))
828                 return PTR_ERR(uobj);
829
830         ret = uobj_remove_commit(uobj);
831
832         return ret ?: in_len;
833 }
834
835 ssize_t ib_uverbs_alloc_mw(struct ib_uverbs_file *file,
836                            struct ib_device *ib_dev,
837                            const char __user *buf, int in_len,
838                            int out_len)
839 {
840         struct ib_uverbs_alloc_mw      cmd;
841         struct ib_uverbs_alloc_mw_resp resp;
842         struct ib_uobject             *uobj;
843         struct ib_pd                  *pd;
844         struct ib_mw                  *mw;
845         struct ib_udata                udata;
846         int                            ret;
847
848         if (out_len < sizeof(resp))
849                 return -ENOSPC;
850
851         if (copy_from_user(&cmd, buf, sizeof(cmd)))
852                 return -EFAULT;
853
854         uobj  = uobj_alloc(uobj_get_type(mw), file->ucontext);
855         if (IS_ERR(uobj))
856                 return PTR_ERR(uobj);
857
858         pd = uobj_get_obj_read(pd, cmd.pd_handle, file->ucontext);
859         if (!pd) {
860                 ret = -EINVAL;
861                 goto err_free;
862         }
863
864         ib_uverbs_init_udata(&udata, buf + sizeof(cmd),
865                    u64_to_user_ptr(cmd.response) + sizeof(resp),
866                    in_len - sizeof(cmd) - sizeof(struct ib_uverbs_cmd_hdr),
867                    out_len - sizeof(resp));
868
869         mw = pd->device->alloc_mw(pd, cmd.mw_type, &udata);
870         if (IS_ERR(mw)) {
871                 ret = PTR_ERR(mw);
872                 goto err_put;
873         }
874
875         mw->device  = pd->device;
876         mw->pd      = pd;
877         mw->uobject = uobj;
878         atomic_inc(&pd->usecnt);
879
880         uobj->object = mw;
881
882         memset(&resp, 0, sizeof(resp));
883         resp.rkey      = mw->rkey;
884         resp.mw_handle = uobj->id;
885
886         if (copy_to_user(u64_to_user_ptr(cmd.response), &resp, sizeof(resp))) {
887                 ret = -EFAULT;
888                 goto err_copy;
889         }
890
891         uobj_put_obj_read(pd);
892         uobj_alloc_commit(uobj);
893
894         return in_len;
895
896 err_copy:
897         uverbs_dealloc_mw(mw);
898 err_put:
899         uobj_put_obj_read(pd);
900 err_free:
901         uobj_alloc_abort(uobj);
902         return ret;
903 }
904
905 ssize_t ib_uverbs_dealloc_mw(struct ib_uverbs_file *file,
906                              struct ib_device *ib_dev,
907                              const char __user *buf, int in_len,
908                              int out_len)
909 {
910         struct ib_uverbs_dealloc_mw cmd;
911         struct ib_uobject          *uobj;
912         int                         ret = -EINVAL;
913
914         if (copy_from_user(&cmd, buf, sizeof(cmd)))
915                 return -EFAULT;
916
917         uobj  = uobj_get_write(uobj_get_type(mw), cmd.mw_handle,
918                                file->ucontext);
919         if (IS_ERR(uobj))
920                 return PTR_ERR(uobj);
921
922         ret = uobj_remove_commit(uobj);
923         return ret ?: in_len;
924 }
925
926 ssize_t ib_uverbs_create_comp_channel(struct ib_uverbs_file *file,
927                                       struct ib_device *ib_dev,
928                                       const char __user *buf, int in_len,
929                                       int out_len)
930 {
931         struct ib_uverbs_create_comp_channel       cmd;
932         struct ib_uverbs_create_comp_channel_resp  resp;
933         struct ib_uobject                         *uobj;
934         struct ib_uverbs_completion_event_file    *ev_file;
935
936         if (out_len < sizeof resp)
937                 return -ENOSPC;
938
939         if (copy_from_user(&cmd, buf, sizeof cmd))
940                 return -EFAULT;
941
942         uobj = uobj_alloc(uobj_get_type(comp_channel), file->ucontext);
943         if (IS_ERR(uobj))
944                 return PTR_ERR(uobj);
945
946         resp.fd = uobj->id;
947
948         ev_file = container_of(uobj, struct ib_uverbs_completion_event_file,
949                                uobj_file.uobj);
950         ib_uverbs_init_event_queue(&ev_file->ev_queue);
951
952         if (copy_to_user(u64_to_user_ptr(cmd.response), &resp, sizeof resp)) {
953                 uobj_alloc_abort(uobj);
954                 return -EFAULT;
955         }
956
957         uobj_alloc_commit(uobj);
958         return in_len;
959 }
960
961 static struct ib_ucq_object *create_cq(struct ib_uverbs_file *file,
962                                         struct ib_device *ib_dev,
963                                        struct ib_udata *ucore,
964                                        struct ib_udata *uhw,
965                                        struct ib_uverbs_ex_create_cq *cmd,
966                                        size_t cmd_sz,
967                                        int (*cb)(struct ib_uverbs_file *file,
968                                                  struct ib_ucq_object *obj,
969                                                  struct ib_uverbs_ex_create_cq_resp *resp,
970                                                  struct ib_udata *udata,
971                                                  void *context),
972                                        void *context)
973 {
974         struct ib_ucq_object           *obj;
975         struct ib_uverbs_completion_event_file    *ev_file = NULL;
976         struct ib_cq                   *cq;
977         int                             ret;
978         struct ib_uverbs_ex_create_cq_resp resp;
979         struct ib_cq_init_attr attr = {};
980
981         if (!ib_dev->create_cq)
982                 return ERR_PTR(-EOPNOTSUPP);
983
984         if (cmd->comp_vector >= file->device->num_comp_vectors)
985                 return ERR_PTR(-EINVAL);
986
987         obj  = (struct ib_ucq_object *)uobj_alloc(uobj_get_type(cq),
988                                                   file->ucontext);
989         if (IS_ERR(obj))
990                 return obj;
991
992         if (cmd->comp_channel >= 0) {
993                 ev_file = ib_uverbs_lookup_comp_file(cmd->comp_channel,
994                                                      file->ucontext);
995                 if (IS_ERR(ev_file)) {
996                         ret = PTR_ERR(ev_file);
997                         goto err;
998                 }
999         }
1000
1001         obj->uobject.user_handle = cmd->user_handle;
1002         obj->uverbs_file           = file;
1003         obj->comp_events_reported  = 0;
1004         obj->async_events_reported = 0;
1005         INIT_LIST_HEAD(&obj->comp_list);
1006         INIT_LIST_HEAD(&obj->async_list);
1007
1008         attr.cqe = cmd->cqe;
1009         attr.comp_vector = cmd->comp_vector;
1010
1011         if (cmd_sz > offsetof(typeof(*cmd), flags) + sizeof(cmd->flags))
1012                 attr.flags = cmd->flags;
1013
1014         cq = ib_dev->create_cq(ib_dev, &attr, file->ucontext, uhw);
1015         if (IS_ERR(cq)) {
1016                 ret = PTR_ERR(cq);
1017                 goto err_file;
1018         }
1019
1020         cq->device        = ib_dev;
1021         cq->uobject       = &obj->uobject;
1022         cq->comp_handler  = ib_uverbs_comp_handler;
1023         cq->event_handler = ib_uverbs_cq_event_handler;
1024         cq->cq_context    = ev_file ? &ev_file->ev_queue : NULL;
1025         atomic_set(&cq->usecnt, 0);
1026
1027         obj->uobject.object = cq;
1028         memset(&resp, 0, sizeof resp);
1029         resp.base.cq_handle = obj->uobject.id;
1030         resp.base.cqe       = cq->cqe;
1031
1032         resp.response_length = offsetof(typeof(resp), response_length) +
1033                 sizeof(resp.response_length);
1034
1035         cq->res.type = RDMA_RESTRACK_CQ;
1036         rdma_restrack_add(&cq->res);
1037
1038         ret = cb(file, obj, &resp, ucore, context);
1039         if (ret)
1040                 goto err_cb;
1041
1042         uobj_alloc_commit(&obj->uobject);
1043         return obj;
1044
1045 err_cb:
1046         ib_destroy_cq(cq);
1047
1048 err_file:
1049         if (ev_file)
1050                 ib_uverbs_release_ucq(file, ev_file, obj);
1051
1052 err:
1053         uobj_alloc_abort(&obj->uobject);
1054
1055         return ERR_PTR(ret);
1056 }
1057
1058 static int ib_uverbs_create_cq_cb(struct ib_uverbs_file *file,
1059                                   struct ib_ucq_object *obj,
1060                                   struct ib_uverbs_ex_create_cq_resp *resp,
1061                                   struct ib_udata *ucore, void *context)
1062 {
1063         if (ib_copy_to_udata(ucore, &resp->base, sizeof(resp->base)))
1064                 return -EFAULT;
1065
1066         return 0;
1067 }
1068
1069 ssize_t ib_uverbs_create_cq(struct ib_uverbs_file *file,
1070                             struct ib_device *ib_dev,
1071                             const char __user *buf, int in_len,
1072                             int out_len)
1073 {
1074         struct ib_uverbs_create_cq      cmd;
1075         struct ib_uverbs_ex_create_cq   cmd_ex;
1076         struct ib_uverbs_create_cq_resp resp;
1077         struct ib_udata                 ucore;
1078         struct ib_udata                 uhw;
1079         struct ib_ucq_object           *obj;
1080
1081         if (out_len < sizeof(resp))
1082                 return -ENOSPC;
1083
1084         if (copy_from_user(&cmd, buf, sizeof(cmd)))
1085                 return -EFAULT;
1086
1087         ib_uverbs_init_udata(&ucore, buf, u64_to_user_ptr(cmd.response),
1088                              sizeof(cmd), sizeof(resp));
1089
1090         ib_uverbs_init_udata(&uhw, buf + sizeof(cmd),
1091                    u64_to_user_ptr(cmd.response) + sizeof(resp),
1092                    in_len - sizeof(cmd) - sizeof(struct ib_uverbs_cmd_hdr),
1093                    out_len - sizeof(resp));
1094
1095         memset(&cmd_ex, 0, sizeof(cmd_ex));
1096         cmd_ex.user_handle = cmd.user_handle;
1097         cmd_ex.cqe = cmd.cqe;
1098         cmd_ex.comp_vector = cmd.comp_vector;
1099         cmd_ex.comp_channel = cmd.comp_channel;
1100
1101         obj = create_cq(file, ib_dev, &ucore, &uhw, &cmd_ex,
1102                         offsetof(typeof(cmd_ex), comp_channel) +
1103                         sizeof(cmd.comp_channel), ib_uverbs_create_cq_cb,
1104                         NULL);
1105
1106         if (IS_ERR(obj))
1107                 return PTR_ERR(obj);
1108
1109         return in_len;
1110 }
1111
1112 static int ib_uverbs_ex_create_cq_cb(struct ib_uverbs_file *file,
1113                                      struct ib_ucq_object *obj,
1114                                      struct ib_uverbs_ex_create_cq_resp *resp,
1115                                      struct ib_udata *ucore, void *context)
1116 {
1117         if (ib_copy_to_udata(ucore, resp, resp->response_length))
1118                 return -EFAULT;
1119
1120         return 0;
1121 }
1122
1123 int ib_uverbs_ex_create_cq(struct ib_uverbs_file *file,
1124                          struct ib_device *ib_dev,
1125                            struct ib_udata *ucore,
1126                            struct ib_udata *uhw)
1127 {
1128         struct ib_uverbs_ex_create_cq_resp resp;
1129         struct ib_uverbs_ex_create_cq  cmd;
1130         struct ib_ucq_object           *obj;
1131         int err;
1132
1133         if (ucore->inlen < sizeof(cmd))
1134                 return -EINVAL;
1135
1136         err = ib_copy_from_udata(&cmd, ucore, sizeof(cmd));
1137         if (err)
1138                 return err;
1139
1140         if (cmd.comp_mask)
1141                 return -EINVAL;
1142
1143         if (cmd.reserved)
1144                 return -EINVAL;
1145
1146         if (ucore->outlen < (offsetof(typeof(resp), response_length) +
1147                              sizeof(resp.response_length)))
1148                 return -ENOSPC;
1149
1150         obj = create_cq(file, ib_dev, ucore, uhw, &cmd,
1151                         min(ucore->inlen, sizeof(cmd)),
1152                         ib_uverbs_ex_create_cq_cb, NULL);
1153
1154         return PTR_ERR_OR_ZERO(obj);
1155 }
1156
1157 ssize_t ib_uverbs_resize_cq(struct ib_uverbs_file *file,
1158                             struct ib_device *ib_dev,
1159                             const char __user *buf, int in_len,
1160                             int out_len)
1161 {
1162         struct ib_uverbs_resize_cq      cmd;
1163         struct ib_uverbs_resize_cq_resp resp = {};
1164         struct ib_udata                 udata;
1165         struct ib_cq                    *cq;
1166         int                             ret = -EINVAL;
1167
1168         if (copy_from_user(&cmd, buf, sizeof cmd))
1169                 return -EFAULT;
1170
1171         ib_uverbs_init_udata(&udata, buf + sizeof(cmd),
1172                    u64_to_user_ptr(cmd.response) + sizeof(resp),
1173                    in_len - sizeof(cmd) - sizeof(struct ib_uverbs_cmd_hdr),
1174                    out_len - sizeof(resp));
1175
1176         cq = uobj_get_obj_read(cq, cmd.cq_handle, file->ucontext);
1177         if (!cq)
1178                 return -EINVAL;
1179
1180         ret = cq->device->resize_cq(cq, cmd.cqe, &udata);
1181         if (ret)
1182                 goto out;
1183
1184         resp.cqe = cq->cqe;
1185
1186         if (copy_to_user(u64_to_user_ptr(cmd.response), &resp, sizeof resp.cqe))
1187                 ret = -EFAULT;
1188
1189 out:
1190         uobj_put_obj_read(cq);
1191
1192         return ret ? ret : in_len;
1193 }
1194
1195 static int copy_wc_to_user(struct ib_device *ib_dev, void __user *dest,
1196                            struct ib_wc *wc)
1197 {
1198         struct ib_uverbs_wc tmp;
1199
1200         tmp.wr_id               = wc->wr_id;
1201         tmp.status              = wc->status;
1202         tmp.opcode              = wc->opcode;
1203         tmp.vendor_err          = wc->vendor_err;
1204         tmp.byte_len            = wc->byte_len;
1205         tmp.ex.imm_data         = wc->ex.imm_data;
1206         tmp.qp_num              = wc->qp->qp_num;
1207         tmp.src_qp              = wc->src_qp;
1208         tmp.wc_flags            = wc->wc_flags;
1209         tmp.pkey_index          = wc->pkey_index;
1210         if (rdma_cap_opa_ah(ib_dev, wc->port_num))
1211                 tmp.slid        = OPA_TO_IB_UCAST_LID(wc->slid);
1212         else
1213                 tmp.slid        = ib_lid_cpu16(wc->slid);
1214         tmp.sl                  = wc->sl;
1215         tmp.dlid_path_bits      = wc->dlid_path_bits;
1216         tmp.port_num            = wc->port_num;
1217         tmp.reserved            = 0;
1218
1219         if (copy_to_user(dest, &tmp, sizeof tmp))
1220                 return -EFAULT;
1221
1222         return 0;
1223 }
1224
1225 ssize_t ib_uverbs_poll_cq(struct ib_uverbs_file *file,
1226                           struct ib_device *ib_dev,
1227                           const char __user *buf, int in_len,
1228                           int out_len)
1229 {
1230         struct ib_uverbs_poll_cq       cmd;
1231         struct ib_uverbs_poll_cq_resp  resp;
1232         u8 __user                     *header_ptr;
1233         u8 __user                     *data_ptr;
1234         struct ib_cq                  *cq;
1235         struct ib_wc                   wc;
1236         int                            ret;
1237
1238         if (copy_from_user(&cmd, buf, sizeof cmd))
1239                 return -EFAULT;
1240
1241         cq = uobj_get_obj_read(cq, cmd.cq_handle, file->ucontext);
1242         if (!cq)
1243                 return -EINVAL;
1244
1245         /* we copy a struct ib_uverbs_poll_cq_resp to user space */
1246         header_ptr = u64_to_user_ptr(cmd.response);
1247         data_ptr = header_ptr + sizeof resp;
1248
1249         memset(&resp, 0, sizeof resp);
1250         while (resp.count < cmd.ne) {
1251                 ret = ib_poll_cq(cq, 1, &wc);
1252                 if (ret < 0)
1253                         goto out_put;
1254                 if (!ret)
1255                         break;
1256
1257                 ret = copy_wc_to_user(ib_dev, data_ptr, &wc);
1258                 if (ret)
1259                         goto out_put;
1260
1261                 data_ptr += sizeof(struct ib_uverbs_wc);
1262                 ++resp.count;
1263         }
1264
1265         if (copy_to_user(header_ptr, &resp, sizeof resp)) {
1266                 ret = -EFAULT;
1267                 goto out_put;
1268         }
1269
1270         ret = in_len;
1271
1272 out_put:
1273         uobj_put_obj_read(cq);
1274         return ret;
1275 }
1276
1277 ssize_t ib_uverbs_req_notify_cq(struct ib_uverbs_file *file,
1278                                 struct ib_device *ib_dev,
1279                                 const char __user *buf, int in_len,
1280                                 int out_len)
1281 {
1282         struct ib_uverbs_req_notify_cq cmd;
1283         struct ib_cq                  *cq;
1284
1285         if (copy_from_user(&cmd, buf, sizeof cmd))
1286                 return -EFAULT;
1287
1288         cq = uobj_get_obj_read(cq, cmd.cq_handle, file->ucontext);
1289         if (!cq)
1290                 return -EINVAL;
1291
1292         ib_req_notify_cq(cq, cmd.solicited_only ?
1293                          IB_CQ_SOLICITED : IB_CQ_NEXT_COMP);
1294
1295         uobj_put_obj_read(cq);
1296
1297         return in_len;
1298 }
1299
1300 ssize_t ib_uverbs_destroy_cq(struct ib_uverbs_file *file,
1301                              struct ib_device *ib_dev,
1302                              const char __user *buf, int in_len,
1303                              int out_len)
1304 {
1305         struct ib_uverbs_destroy_cq      cmd;
1306         struct ib_uverbs_destroy_cq_resp resp;
1307         struct ib_uobject               *uobj;
1308         struct ib_cq                    *cq;
1309         struct ib_ucq_object            *obj;
1310         int                              ret = -EINVAL;
1311
1312         if (copy_from_user(&cmd, buf, sizeof cmd))
1313                 return -EFAULT;
1314
1315         uobj  = uobj_get_write(uobj_get_type(cq), cmd.cq_handle,
1316                                file->ucontext);
1317         if (IS_ERR(uobj))
1318                 return PTR_ERR(uobj);
1319
1320         /*
1321          * Make sure we don't free the memory in remove_commit as we still
1322          * needs the uobject memory to create the response.
1323          */
1324         uverbs_uobject_get(uobj);
1325         cq      = uobj->object;
1326         obj     = container_of(cq->uobject, struct ib_ucq_object, uobject);
1327
1328         memset(&resp, 0, sizeof(resp));
1329
1330         ret = uobj_remove_commit(uobj);
1331         if (ret) {
1332                 uverbs_uobject_put(uobj);
1333                 return ret;
1334         }
1335
1336         resp.comp_events_reported  = obj->comp_events_reported;
1337         resp.async_events_reported = obj->async_events_reported;
1338
1339         uverbs_uobject_put(uobj);
1340         if (copy_to_user(u64_to_user_ptr(cmd.response), &resp, sizeof resp))
1341                 return -EFAULT;
1342
1343         return in_len;
1344 }
1345
1346 static int create_qp(struct ib_uverbs_file *file,
1347                      struct ib_udata *ucore,
1348                      struct ib_udata *uhw,
1349                      struct ib_uverbs_ex_create_qp *cmd,
1350                      size_t cmd_sz,
1351                      int (*cb)(struct ib_uverbs_file *file,
1352                                struct ib_uverbs_ex_create_qp_resp *resp,
1353                                struct ib_udata *udata),
1354                      void *context)
1355 {
1356         struct ib_uqp_object            *obj;
1357         struct ib_device                *device;
1358         struct ib_pd                    *pd = NULL;
1359         struct ib_xrcd                  *xrcd = NULL;
1360         struct ib_uobject               *xrcd_uobj = ERR_PTR(-ENOENT);
1361         struct ib_cq                    *scq = NULL, *rcq = NULL;
1362         struct ib_srq                   *srq = NULL;
1363         struct ib_qp                    *qp;
1364         char                            *buf;
1365         struct ib_qp_init_attr          attr = {};
1366         struct ib_uverbs_ex_create_qp_resp resp;
1367         int                             ret;
1368         struct ib_rwq_ind_table *ind_tbl = NULL;
1369         bool has_sq = true;
1370
1371         if (cmd->qp_type == IB_QPT_RAW_PACKET && !capable(CAP_NET_RAW))
1372                 return -EPERM;
1373
1374         obj  = (struct ib_uqp_object *)uobj_alloc(uobj_get_type(qp),
1375                                                   file->ucontext);
1376         if (IS_ERR(obj))
1377                 return PTR_ERR(obj);
1378         obj->uxrcd = NULL;
1379         obj->uevent.uobject.user_handle = cmd->user_handle;
1380         mutex_init(&obj->mcast_lock);
1381
1382         if (cmd_sz >= offsetof(typeof(*cmd), rwq_ind_tbl_handle) +
1383                       sizeof(cmd->rwq_ind_tbl_handle) &&
1384                       (cmd->comp_mask & IB_UVERBS_CREATE_QP_MASK_IND_TABLE)) {
1385                 ind_tbl = uobj_get_obj_read(rwq_ind_table,
1386                                             cmd->rwq_ind_tbl_handle,
1387                                             file->ucontext);
1388                 if (!ind_tbl) {
1389                         ret = -EINVAL;
1390                         goto err_put;
1391                 }
1392
1393                 attr.rwq_ind_tbl = ind_tbl;
1394         }
1395
1396         if (cmd_sz > sizeof(*cmd) &&
1397             !ib_is_udata_cleared(ucore, sizeof(*cmd),
1398                                  cmd_sz - sizeof(*cmd))) {
1399                 ret = -EOPNOTSUPP;
1400                 goto err_put;
1401         }
1402
1403         if (ind_tbl && (cmd->max_recv_wr || cmd->max_recv_sge || cmd->is_srq)) {
1404                 ret = -EINVAL;
1405                 goto err_put;
1406         }
1407
1408         if (ind_tbl && !cmd->max_send_wr)
1409                 has_sq = false;
1410
1411         if (cmd->qp_type == IB_QPT_XRC_TGT) {
1412                 xrcd_uobj = uobj_get_read(uobj_get_type(xrcd), cmd->pd_handle,
1413                                           file->ucontext);
1414
1415                 if (IS_ERR(xrcd_uobj)) {
1416                         ret = -EINVAL;
1417                         goto err_put;
1418                 }
1419
1420                 xrcd = (struct ib_xrcd *)xrcd_uobj->object;
1421                 if (!xrcd) {
1422                         ret = -EINVAL;
1423                         goto err_put;
1424                 }
1425                 device = xrcd->device;
1426         } else {
1427                 if (cmd->qp_type == IB_QPT_XRC_INI) {
1428                         cmd->max_recv_wr = 0;
1429                         cmd->max_recv_sge = 0;
1430                 } else {
1431                         if (cmd->is_srq) {
1432                                 srq = uobj_get_obj_read(srq, cmd->srq_handle,
1433                                                         file->ucontext);
1434                                 if (!srq || srq->srq_type == IB_SRQT_XRC) {
1435                                         ret = -EINVAL;
1436                                         goto err_put;
1437                                 }
1438                         }
1439
1440                         if (!ind_tbl) {
1441                                 if (cmd->recv_cq_handle != cmd->send_cq_handle) {
1442                                         rcq = uobj_get_obj_read(cq, cmd->recv_cq_handle,
1443                                                                 file->ucontext);
1444                                         if (!rcq) {
1445                                                 ret = -EINVAL;
1446                                                 goto err_put;
1447                                         }
1448                                 }
1449                         }
1450                 }
1451
1452                 if (has_sq)
1453                         scq = uobj_get_obj_read(cq, cmd->send_cq_handle,
1454                                                 file->ucontext);
1455                 if (!ind_tbl)
1456                         rcq = rcq ?: scq;
1457                 pd  = uobj_get_obj_read(pd, cmd->pd_handle, file->ucontext);
1458                 if (!pd || (!scq && has_sq)) {
1459                         ret = -EINVAL;
1460                         goto err_put;
1461                 }
1462
1463                 device = pd->device;
1464         }
1465
1466         attr.event_handler = ib_uverbs_qp_event_handler;
1467         attr.qp_context    = file;
1468         attr.send_cq       = scq;
1469         attr.recv_cq       = rcq;
1470         attr.srq           = srq;
1471         attr.xrcd          = xrcd;
1472         attr.sq_sig_type   = cmd->sq_sig_all ? IB_SIGNAL_ALL_WR :
1473                                               IB_SIGNAL_REQ_WR;
1474         attr.qp_type       = cmd->qp_type;
1475         attr.create_flags  = 0;
1476
1477         attr.cap.max_send_wr     = cmd->max_send_wr;
1478         attr.cap.max_recv_wr     = cmd->max_recv_wr;
1479         attr.cap.max_send_sge    = cmd->max_send_sge;
1480         attr.cap.max_recv_sge    = cmd->max_recv_sge;
1481         attr.cap.max_inline_data = cmd->max_inline_data;
1482
1483         obj->uevent.events_reported     = 0;
1484         INIT_LIST_HEAD(&obj->uevent.event_list);
1485         INIT_LIST_HEAD(&obj->mcast_list);
1486
1487         if (cmd_sz >= offsetof(typeof(*cmd), create_flags) +
1488                       sizeof(cmd->create_flags))
1489                 attr.create_flags = cmd->create_flags;
1490
1491         if (attr.create_flags & ~(IB_QP_CREATE_BLOCK_MULTICAST_LOOPBACK |
1492                                 IB_QP_CREATE_CROSS_CHANNEL |
1493                                 IB_QP_CREATE_MANAGED_SEND |
1494                                 IB_QP_CREATE_MANAGED_RECV |
1495                                 IB_QP_CREATE_SCATTER_FCS |
1496                                 IB_QP_CREATE_CVLAN_STRIPPING |
1497                                 IB_QP_CREATE_SOURCE_QPN |
1498                                 IB_QP_CREATE_PCI_WRITE_END_PADDING)) {
1499                 ret = -EINVAL;
1500                 goto err_put;
1501         }
1502
1503         if (attr.create_flags & IB_QP_CREATE_SOURCE_QPN) {
1504                 if (!capable(CAP_NET_RAW)) {
1505                         ret = -EPERM;
1506                         goto err_put;
1507                 }
1508
1509                 attr.source_qpn = cmd->source_qpn;
1510         }
1511
1512         buf = (void *)cmd + sizeof(*cmd);
1513         if (cmd_sz > sizeof(*cmd))
1514                 if (!(buf[0] == 0 && !memcmp(buf, buf + 1,
1515                                              cmd_sz - sizeof(*cmd) - 1))) {
1516                         ret = -EINVAL;
1517                         goto err_put;
1518                 }
1519
1520         if (cmd->qp_type == IB_QPT_XRC_TGT)
1521                 qp = ib_create_qp(pd, &attr);
1522         else
1523                 qp = _ib_create_qp(device, pd, &attr, uhw,
1524                                    &obj->uevent.uobject);
1525
1526         if (IS_ERR(qp)) {
1527                 ret = PTR_ERR(qp);
1528                 goto err_put;
1529         }
1530
1531         if (cmd->qp_type != IB_QPT_XRC_TGT) {
1532                 ret = ib_create_qp_security(qp, device);
1533                 if (ret)
1534                         goto err_cb;
1535
1536                 qp->real_qp       = qp;
1537                 qp->pd            = pd;
1538                 qp->send_cq       = attr.send_cq;
1539                 qp->recv_cq       = attr.recv_cq;
1540                 qp->srq           = attr.srq;
1541                 qp->rwq_ind_tbl   = ind_tbl;
1542                 qp->event_handler = attr.event_handler;
1543                 qp->qp_context    = attr.qp_context;
1544                 qp->qp_type       = attr.qp_type;
1545                 atomic_set(&qp->usecnt, 0);
1546                 atomic_inc(&pd->usecnt);
1547                 qp->port = 0;
1548                 if (attr.send_cq)
1549                         atomic_inc(&attr.send_cq->usecnt);
1550                 if (attr.recv_cq)
1551                         atomic_inc(&attr.recv_cq->usecnt);
1552                 if (attr.srq)
1553                         atomic_inc(&attr.srq->usecnt);
1554                 if (ind_tbl)
1555                         atomic_inc(&ind_tbl->usecnt);
1556         } else {
1557                 /* It is done in _ib_create_qp for other QP types */
1558                 qp->uobject = &obj->uevent.uobject;
1559         }
1560
1561         obj->uevent.uobject.object = qp;
1562
1563         memset(&resp, 0, sizeof resp);
1564         resp.base.qpn             = qp->qp_num;
1565         resp.base.qp_handle       = obj->uevent.uobject.id;
1566         resp.base.max_recv_sge    = attr.cap.max_recv_sge;
1567         resp.base.max_send_sge    = attr.cap.max_send_sge;
1568         resp.base.max_recv_wr     = attr.cap.max_recv_wr;
1569         resp.base.max_send_wr     = attr.cap.max_send_wr;
1570         resp.base.max_inline_data = attr.cap.max_inline_data;
1571
1572         resp.response_length = offsetof(typeof(resp), response_length) +
1573                                sizeof(resp.response_length);
1574
1575         ret = cb(file, &resp, ucore);
1576         if (ret)
1577                 goto err_cb;
1578
1579         if (xrcd) {
1580                 obj->uxrcd = container_of(xrcd_uobj, struct ib_uxrcd_object,
1581                                           uobject);
1582                 atomic_inc(&obj->uxrcd->refcnt);
1583                 uobj_put_read(xrcd_uobj);
1584         }
1585
1586         if (pd)
1587                 uobj_put_obj_read(pd);
1588         if (scq)
1589                 uobj_put_obj_read(scq);
1590         if (rcq && rcq != scq)
1591                 uobj_put_obj_read(rcq);
1592         if (srq)
1593                 uobj_put_obj_read(srq);
1594         if (ind_tbl)
1595                 uobj_put_obj_read(ind_tbl);
1596
1597         uobj_alloc_commit(&obj->uevent.uobject);
1598
1599         return 0;
1600 err_cb:
1601         ib_destroy_qp(qp);
1602
1603 err_put:
1604         if (!IS_ERR(xrcd_uobj))
1605                 uobj_put_read(xrcd_uobj);
1606         if (pd)
1607                 uobj_put_obj_read(pd);
1608         if (scq)
1609                 uobj_put_obj_read(scq);
1610         if (rcq && rcq != scq)
1611                 uobj_put_obj_read(rcq);
1612         if (srq)
1613                 uobj_put_obj_read(srq);
1614         if (ind_tbl)
1615                 uobj_put_obj_read(ind_tbl);
1616
1617         uobj_alloc_abort(&obj->uevent.uobject);
1618         return ret;
1619 }
1620
1621 static int ib_uverbs_create_qp_cb(struct ib_uverbs_file *file,
1622                                   struct ib_uverbs_ex_create_qp_resp *resp,
1623                                   struct ib_udata *ucore)
1624 {
1625         if (ib_copy_to_udata(ucore, &resp->base, sizeof(resp->base)))
1626                 return -EFAULT;
1627
1628         return 0;
1629 }
1630
1631 ssize_t ib_uverbs_create_qp(struct ib_uverbs_file *file,
1632                             struct ib_device *ib_dev,
1633                             const char __user *buf, int in_len,
1634                             int out_len)
1635 {
1636         struct ib_uverbs_create_qp      cmd;
1637         struct ib_uverbs_ex_create_qp   cmd_ex;
1638         struct ib_udata                 ucore;
1639         struct ib_udata                 uhw;
1640         ssize_t resp_size = sizeof(struct ib_uverbs_create_qp_resp);
1641         int                             err;
1642
1643         if (out_len < resp_size)
1644                 return -ENOSPC;
1645
1646         if (copy_from_user(&cmd, buf, sizeof(cmd)))
1647                 return -EFAULT;
1648
1649         ib_uverbs_init_udata(&ucore, buf, u64_to_user_ptr(cmd.response),
1650                    sizeof(cmd), resp_size);
1651         ib_uverbs_init_udata(&uhw, buf + sizeof(cmd),
1652                    u64_to_user_ptr(cmd.response) + resp_size,
1653                    in_len - sizeof(cmd) - sizeof(struct ib_uverbs_cmd_hdr),
1654                    out_len - resp_size);
1655
1656         memset(&cmd_ex, 0, sizeof(cmd_ex));
1657         cmd_ex.user_handle = cmd.user_handle;
1658         cmd_ex.pd_handle = cmd.pd_handle;
1659         cmd_ex.send_cq_handle = cmd.send_cq_handle;
1660         cmd_ex.recv_cq_handle = cmd.recv_cq_handle;
1661         cmd_ex.srq_handle = cmd.srq_handle;
1662         cmd_ex.max_send_wr = cmd.max_send_wr;
1663         cmd_ex.max_recv_wr = cmd.max_recv_wr;
1664         cmd_ex.max_send_sge = cmd.max_send_sge;
1665         cmd_ex.max_recv_sge = cmd.max_recv_sge;
1666         cmd_ex.max_inline_data = cmd.max_inline_data;
1667         cmd_ex.sq_sig_all = cmd.sq_sig_all;
1668         cmd_ex.qp_type = cmd.qp_type;
1669         cmd_ex.is_srq = cmd.is_srq;
1670
1671         err = create_qp(file, &ucore, &uhw, &cmd_ex,
1672                         offsetof(typeof(cmd_ex), is_srq) +
1673                         sizeof(cmd.is_srq), ib_uverbs_create_qp_cb,
1674                         NULL);
1675
1676         if (err)
1677                 return err;
1678
1679         return in_len;
1680 }
1681
1682 static int ib_uverbs_ex_create_qp_cb(struct ib_uverbs_file *file,
1683                                      struct ib_uverbs_ex_create_qp_resp *resp,
1684                                      struct ib_udata *ucore)
1685 {
1686         if (ib_copy_to_udata(ucore, resp, resp->response_length))
1687                 return -EFAULT;
1688
1689         return 0;
1690 }
1691
1692 int ib_uverbs_ex_create_qp(struct ib_uverbs_file *file,
1693                            struct ib_device *ib_dev,
1694                            struct ib_udata *ucore,
1695                            struct ib_udata *uhw)
1696 {
1697         struct ib_uverbs_ex_create_qp_resp resp;
1698         struct ib_uverbs_ex_create_qp cmd = {0};
1699         int err;
1700
1701         if (ucore->inlen < (offsetof(typeof(cmd), comp_mask) +
1702                             sizeof(cmd.comp_mask)))
1703                 return -EINVAL;
1704
1705         err = ib_copy_from_udata(&cmd, ucore, min(sizeof(cmd), ucore->inlen));
1706         if (err)
1707                 return err;
1708
1709         if (cmd.comp_mask & ~IB_UVERBS_CREATE_QP_SUP_COMP_MASK)
1710                 return -EINVAL;
1711
1712         if (cmd.reserved)
1713                 return -EINVAL;
1714
1715         if (ucore->outlen < (offsetof(typeof(resp), response_length) +
1716                              sizeof(resp.response_length)))
1717                 return -ENOSPC;
1718
1719         err = create_qp(file, ucore, uhw, &cmd,
1720                         min(ucore->inlen, sizeof(cmd)),
1721                         ib_uverbs_ex_create_qp_cb, NULL);
1722
1723         if (err)
1724                 return err;
1725
1726         return 0;
1727 }
1728
1729 ssize_t ib_uverbs_open_qp(struct ib_uverbs_file *file,
1730                           struct ib_device *ib_dev,
1731                           const char __user *buf, int in_len, int out_len)
1732 {
1733         struct ib_uverbs_open_qp        cmd;
1734         struct ib_uverbs_create_qp_resp resp;
1735         struct ib_udata                 udata;
1736         struct ib_uqp_object           *obj;
1737         struct ib_xrcd                 *xrcd;
1738         struct ib_uobject              *uninitialized_var(xrcd_uobj);
1739         struct ib_qp                   *qp;
1740         struct ib_qp_open_attr          attr;
1741         int ret;
1742
1743         if (out_len < sizeof resp)
1744                 return -ENOSPC;
1745
1746         if (copy_from_user(&cmd, buf, sizeof cmd))
1747                 return -EFAULT;
1748
1749         ib_uverbs_init_udata(&udata, buf + sizeof(cmd),
1750                    u64_to_user_ptr(cmd.response) + sizeof(resp),
1751                    in_len - sizeof(cmd) - sizeof(struct ib_uverbs_cmd_hdr),
1752                    out_len - sizeof(resp));
1753
1754         obj  = (struct ib_uqp_object *)uobj_alloc(uobj_get_type(qp),
1755                                                   file->ucontext);
1756         if (IS_ERR(obj))
1757                 return PTR_ERR(obj);
1758
1759         xrcd_uobj = uobj_get_read(uobj_get_type(xrcd), cmd.pd_handle,
1760                                   file->ucontext);
1761         if (IS_ERR(xrcd_uobj)) {
1762                 ret = -EINVAL;
1763                 goto err_put;
1764         }
1765
1766         xrcd = (struct ib_xrcd *)xrcd_uobj->object;
1767         if (!xrcd) {
1768                 ret = -EINVAL;
1769                 goto err_xrcd;
1770         }
1771
1772         attr.event_handler = ib_uverbs_qp_event_handler;
1773         attr.qp_context    = file;
1774         attr.qp_num        = cmd.qpn;
1775         attr.qp_type       = cmd.qp_type;
1776
1777         obj->uevent.events_reported = 0;
1778         INIT_LIST_HEAD(&obj->uevent.event_list);
1779         INIT_LIST_HEAD(&obj->mcast_list);
1780
1781         qp = ib_open_qp(xrcd, &attr);
1782         if (IS_ERR(qp)) {
1783                 ret = PTR_ERR(qp);
1784                 goto err_xrcd;
1785         }
1786
1787         obj->uevent.uobject.object = qp;
1788         obj->uevent.uobject.user_handle = cmd.user_handle;
1789
1790         memset(&resp, 0, sizeof resp);
1791         resp.qpn       = qp->qp_num;
1792         resp.qp_handle = obj->uevent.uobject.id;
1793
1794         if (copy_to_user(u64_to_user_ptr(cmd.response), &resp, sizeof resp)) {
1795                 ret = -EFAULT;
1796                 goto err_destroy;
1797         }
1798
1799         obj->uxrcd = container_of(xrcd_uobj, struct ib_uxrcd_object, uobject);
1800         atomic_inc(&obj->uxrcd->refcnt);
1801         qp->uobject = &obj->uevent.uobject;
1802         uobj_put_read(xrcd_uobj);
1803
1804
1805         uobj_alloc_commit(&obj->uevent.uobject);
1806
1807         return in_len;
1808
1809 err_destroy:
1810         ib_destroy_qp(qp);
1811 err_xrcd:
1812         uobj_put_read(xrcd_uobj);
1813 err_put:
1814         uobj_alloc_abort(&obj->uevent.uobject);
1815         return ret;
1816 }
1817
1818 static void copy_ah_attr_to_uverbs(struct ib_uverbs_qp_dest *uverb_attr,
1819                                    struct rdma_ah_attr *rdma_attr)
1820 {
1821         const struct ib_global_route   *grh;
1822
1823         uverb_attr->dlid              = rdma_ah_get_dlid(rdma_attr);
1824         uverb_attr->sl                = rdma_ah_get_sl(rdma_attr);
1825         uverb_attr->src_path_bits     = rdma_ah_get_path_bits(rdma_attr);
1826         uverb_attr->static_rate       = rdma_ah_get_static_rate(rdma_attr);
1827         uverb_attr->is_global         = !!(rdma_ah_get_ah_flags(rdma_attr) &
1828                                          IB_AH_GRH);
1829         if (uverb_attr->is_global) {
1830                 grh = rdma_ah_read_grh(rdma_attr);
1831                 memcpy(uverb_attr->dgid, grh->dgid.raw, 16);
1832                 uverb_attr->flow_label        = grh->flow_label;
1833                 uverb_attr->sgid_index        = grh->sgid_index;
1834                 uverb_attr->hop_limit         = grh->hop_limit;
1835                 uverb_attr->traffic_class     = grh->traffic_class;
1836         }
1837         uverb_attr->port_num          = rdma_ah_get_port_num(rdma_attr);
1838 }
1839
1840 ssize_t ib_uverbs_query_qp(struct ib_uverbs_file *file,
1841                            struct ib_device *ib_dev,
1842                            const char __user *buf, int in_len,
1843                            int out_len)
1844 {
1845         struct ib_uverbs_query_qp      cmd;
1846         struct ib_uverbs_query_qp_resp resp;
1847         struct ib_qp                   *qp;
1848         struct ib_qp_attr              *attr;
1849         struct ib_qp_init_attr         *init_attr;
1850         int                            ret;
1851
1852         if (copy_from_user(&cmd, buf, sizeof cmd))
1853                 return -EFAULT;
1854
1855         attr      = kmalloc(sizeof *attr, GFP_KERNEL);
1856         init_attr = kmalloc(sizeof *init_attr, GFP_KERNEL);
1857         if (!attr || !init_attr) {
1858                 ret = -ENOMEM;
1859                 goto out;
1860         }
1861
1862         qp = uobj_get_obj_read(qp, cmd.qp_handle, file->ucontext);
1863         if (!qp) {
1864                 ret = -EINVAL;
1865                 goto out;
1866         }
1867
1868         ret = ib_query_qp(qp, attr, cmd.attr_mask, init_attr);
1869
1870         uobj_put_obj_read(qp);
1871
1872         if (ret)
1873                 goto out;
1874
1875         memset(&resp, 0, sizeof resp);
1876
1877         resp.qp_state               = attr->qp_state;
1878         resp.cur_qp_state           = attr->cur_qp_state;
1879         resp.path_mtu               = attr->path_mtu;
1880         resp.path_mig_state         = attr->path_mig_state;
1881         resp.qkey                   = attr->qkey;
1882         resp.rq_psn                 = attr->rq_psn;
1883         resp.sq_psn                 = attr->sq_psn;
1884         resp.dest_qp_num            = attr->dest_qp_num;
1885         resp.qp_access_flags        = attr->qp_access_flags;
1886         resp.pkey_index             = attr->pkey_index;
1887         resp.alt_pkey_index         = attr->alt_pkey_index;
1888         resp.sq_draining            = attr->sq_draining;
1889         resp.max_rd_atomic          = attr->max_rd_atomic;
1890         resp.max_dest_rd_atomic     = attr->max_dest_rd_atomic;
1891         resp.min_rnr_timer          = attr->min_rnr_timer;
1892         resp.port_num               = attr->port_num;
1893         resp.timeout                = attr->timeout;
1894         resp.retry_cnt              = attr->retry_cnt;
1895         resp.rnr_retry              = attr->rnr_retry;
1896         resp.alt_port_num           = attr->alt_port_num;
1897         resp.alt_timeout            = attr->alt_timeout;
1898
1899         copy_ah_attr_to_uverbs(&resp.dest, &attr->ah_attr);
1900         copy_ah_attr_to_uverbs(&resp.alt_dest, &attr->alt_ah_attr);
1901
1902         resp.max_send_wr            = init_attr->cap.max_send_wr;
1903         resp.max_recv_wr            = init_attr->cap.max_recv_wr;
1904         resp.max_send_sge           = init_attr->cap.max_send_sge;
1905         resp.max_recv_sge           = init_attr->cap.max_recv_sge;
1906         resp.max_inline_data        = init_attr->cap.max_inline_data;
1907         resp.sq_sig_all             = init_attr->sq_sig_type == IB_SIGNAL_ALL_WR;
1908
1909         if (copy_to_user(u64_to_user_ptr(cmd.response), &resp, sizeof resp))
1910                 ret = -EFAULT;
1911
1912 out:
1913         kfree(attr);
1914         kfree(init_attr);
1915
1916         return ret ? ret : in_len;
1917 }
1918
1919 /* Remove ignored fields set in the attribute mask */
1920 static int modify_qp_mask(enum ib_qp_type qp_type, int mask)
1921 {
1922         switch (qp_type) {
1923         case IB_QPT_XRC_INI:
1924                 return mask & ~(IB_QP_MAX_DEST_RD_ATOMIC | IB_QP_MIN_RNR_TIMER);
1925         case IB_QPT_XRC_TGT:
1926                 return mask & ~(IB_QP_MAX_QP_RD_ATOMIC | IB_QP_RETRY_CNT |
1927                                 IB_QP_RNR_RETRY);
1928         default:
1929                 return mask;
1930         }
1931 }
1932
1933 static void copy_ah_attr_from_uverbs(struct ib_device *dev,
1934                                      struct rdma_ah_attr *rdma_attr,
1935                                      struct ib_uverbs_qp_dest *uverb_attr)
1936 {
1937         rdma_attr->type = rdma_ah_find_type(dev, uverb_attr->port_num);
1938         if (uverb_attr->is_global) {
1939                 rdma_ah_set_grh(rdma_attr, NULL,
1940                                 uverb_attr->flow_label,
1941                                 uverb_attr->sgid_index,
1942                                 uverb_attr->hop_limit,
1943                                 uverb_attr->traffic_class);
1944                 rdma_ah_set_dgid_raw(rdma_attr, uverb_attr->dgid);
1945         } else {
1946                 rdma_ah_set_ah_flags(rdma_attr, 0);
1947         }
1948         rdma_ah_set_dlid(rdma_attr, uverb_attr->dlid);
1949         rdma_ah_set_sl(rdma_attr, uverb_attr->sl);
1950         rdma_ah_set_path_bits(rdma_attr, uverb_attr->src_path_bits);
1951         rdma_ah_set_static_rate(rdma_attr, uverb_attr->static_rate);
1952         rdma_ah_set_port_num(rdma_attr, uverb_attr->port_num);
1953         rdma_ah_set_make_grd(rdma_attr, false);
1954 }
1955
1956 static int modify_qp(struct ib_uverbs_file *file,
1957                      struct ib_uverbs_ex_modify_qp *cmd, struct ib_udata *udata)
1958 {
1959         struct ib_qp_attr *attr;
1960         struct ib_qp *qp;
1961         int ret;
1962
1963         attr = kmalloc(sizeof *attr, GFP_KERNEL);
1964         if (!attr)
1965                 return -ENOMEM;
1966
1967         qp = uobj_get_obj_read(qp, cmd->base.qp_handle, file->ucontext);
1968         if (!qp) {
1969                 ret = -EINVAL;
1970                 goto out;
1971         }
1972
1973         if ((cmd->base.attr_mask & IB_QP_PORT) &&
1974             !rdma_is_port_valid(qp->device, cmd->base.port_num)) {
1975                 ret = -EINVAL;
1976                 goto release_qp;
1977         }
1978
1979         if ((cmd->base.attr_mask & IB_QP_AV) &&
1980             !rdma_is_port_valid(qp->device, cmd->base.dest.port_num)) {
1981                 ret = -EINVAL;
1982                 goto release_qp;
1983         }
1984
1985         if ((cmd->base.attr_mask & IB_QP_ALT_PATH) &&
1986             (!rdma_is_port_valid(qp->device, cmd->base.alt_port_num) ||
1987             !rdma_is_port_valid(qp->device, cmd->base.alt_dest.port_num))) {
1988                 ret = -EINVAL;
1989                 goto release_qp;
1990         }
1991
1992         attr->qp_state            = cmd->base.qp_state;
1993         attr->cur_qp_state        = cmd->base.cur_qp_state;
1994         attr->path_mtu            = cmd->base.path_mtu;
1995         attr->path_mig_state      = cmd->base.path_mig_state;
1996         attr->qkey                = cmd->base.qkey;
1997         attr->rq_psn              = cmd->base.rq_psn;
1998         attr->sq_psn              = cmd->base.sq_psn;
1999         attr->dest_qp_num         = cmd->base.dest_qp_num;
2000         attr->qp_access_flags     = cmd->base.qp_access_flags;
2001         attr->pkey_index          = cmd->base.pkey_index;
2002         attr->alt_pkey_index      = cmd->base.alt_pkey_index;
2003         attr->en_sqd_async_notify = cmd->base.en_sqd_async_notify;
2004         attr->max_rd_atomic       = cmd->base.max_rd_atomic;
2005         attr->max_dest_rd_atomic  = cmd->base.max_dest_rd_atomic;
2006         attr->min_rnr_timer       = cmd->base.min_rnr_timer;
2007         attr->port_num            = cmd->base.port_num;
2008         attr->timeout             = cmd->base.timeout;
2009         attr->retry_cnt           = cmd->base.retry_cnt;
2010         attr->rnr_retry           = cmd->base.rnr_retry;
2011         attr->alt_port_num        = cmd->base.alt_port_num;
2012         attr->alt_timeout         = cmd->base.alt_timeout;
2013         attr->rate_limit          = cmd->rate_limit;
2014
2015         if (cmd->base.attr_mask & IB_QP_AV)
2016                 copy_ah_attr_from_uverbs(qp->device, &attr->ah_attr,
2017                                          &cmd->base.dest);
2018
2019         if (cmd->base.attr_mask & IB_QP_ALT_PATH)
2020                 copy_ah_attr_from_uverbs(qp->device, &attr->alt_ah_attr,
2021                                          &cmd->base.alt_dest);
2022
2023         ret = ib_modify_qp_with_udata(qp, attr,
2024                                       modify_qp_mask(qp->qp_type,
2025                                                      cmd->base.attr_mask),
2026                                       udata);
2027
2028 release_qp:
2029         uobj_put_obj_read(qp);
2030 out:
2031         kfree(attr);
2032
2033         return ret;
2034 }
2035
2036 ssize_t ib_uverbs_modify_qp(struct ib_uverbs_file *file,
2037                             struct ib_device *ib_dev,
2038                             const char __user *buf, int in_len,
2039                             int out_len)
2040 {
2041         struct ib_uverbs_ex_modify_qp cmd = {};
2042         struct ib_udata udata;
2043         int ret;
2044
2045         if (copy_from_user(&cmd.base, buf, sizeof(cmd.base)))
2046                 return -EFAULT;
2047
2048         if (cmd.base.attr_mask &
2049             ~((IB_USER_LEGACY_LAST_QP_ATTR_MASK << 1) - 1))
2050                 return -EOPNOTSUPP;
2051
2052         ib_uverbs_init_udata(&udata, buf + sizeof(cmd.base), NULL,
2053                    in_len - sizeof(cmd.base) - sizeof(struct ib_uverbs_cmd_hdr),
2054                    out_len);
2055
2056         ret = modify_qp(file, &cmd, &udata);
2057         if (ret)
2058                 return ret;
2059
2060         return in_len;
2061 }
2062
2063 int ib_uverbs_ex_modify_qp(struct ib_uverbs_file *file,
2064                            struct ib_device *ib_dev,
2065                            struct ib_udata *ucore,
2066                            struct ib_udata *uhw)
2067 {
2068         struct ib_uverbs_ex_modify_qp cmd = {};
2069         int ret;
2070
2071         /*
2072          * Last bit is reserved for extending the attr_mask by
2073          * using another field.
2074          */
2075         BUILD_BUG_ON(IB_USER_LAST_QP_ATTR_MASK == (1 << 31));
2076
2077         if (ucore->inlen < sizeof(cmd.base))
2078                 return -EINVAL;
2079
2080         ret = ib_copy_from_udata(&cmd, ucore, min(sizeof(cmd), ucore->inlen));
2081         if (ret)
2082                 return ret;
2083
2084         if (cmd.base.attr_mask &
2085             ~((IB_USER_LAST_QP_ATTR_MASK << 1) - 1))
2086                 return -EOPNOTSUPP;
2087
2088         if (ucore->inlen > sizeof(cmd)) {
2089                 if (!ib_is_udata_cleared(ucore, sizeof(cmd),
2090                                          ucore->inlen - sizeof(cmd)))
2091                         return -EOPNOTSUPP;
2092         }
2093
2094         ret = modify_qp(file, &cmd, uhw);
2095
2096         return ret;
2097 }
2098
2099 ssize_t ib_uverbs_destroy_qp(struct ib_uverbs_file *file,
2100                              struct ib_device *ib_dev,
2101                              const char __user *buf, int in_len,
2102                              int out_len)
2103 {
2104         struct ib_uverbs_destroy_qp      cmd;
2105         struct ib_uverbs_destroy_qp_resp resp;
2106         struct ib_uobject               *uobj;
2107         struct ib_uqp_object            *obj;
2108         int                              ret = -EINVAL;
2109
2110         if (copy_from_user(&cmd, buf, sizeof cmd))
2111                 return -EFAULT;
2112
2113         memset(&resp, 0, sizeof resp);
2114
2115         uobj  = uobj_get_write(uobj_get_type(qp), cmd.qp_handle,
2116                                file->ucontext);
2117         if (IS_ERR(uobj))
2118                 return PTR_ERR(uobj);
2119
2120         obj = container_of(uobj, struct ib_uqp_object, uevent.uobject);
2121         /*
2122          * Make sure we don't free the memory in remove_commit as we still
2123          * needs the uobject memory to create the response.
2124          */
2125         uverbs_uobject_get(uobj);
2126
2127         ret = uobj_remove_commit(uobj);
2128         if (ret) {
2129                 uverbs_uobject_put(uobj);
2130                 return ret;
2131         }
2132
2133         resp.events_reported = obj->uevent.events_reported;
2134         uverbs_uobject_put(uobj);
2135
2136         if (copy_to_user(u64_to_user_ptr(cmd.response), &resp, sizeof resp))
2137                 return -EFAULT;
2138
2139         return in_len;
2140 }
2141
2142 static void *alloc_wr(size_t wr_size, __u32 num_sge)
2143 {
2144         if (num_sge >= (U32_MAX - ALIGN(wr_size, sizeof (struct ib_sge))) /
2145                        sizeof (struct ib_sge))
2146                 return NULL;
2147
2148         return kmalloc(ALIGN(wr_size, sizeof (struct ib_sge)) +
2149                          num_sge * sizeof (struct ib_sge), GFP_KERNEL);
2150 }
2151
2152 ssize_t ib_uverbs_post_send(struct ib_uverbs_file *file,
2153                             struct ib_device *ib_dev,
2154                             const char __user *buf, int in_len,
2155                             int out_len)
2156 {
2157         struct ib_uverbs_post_send      cmd;
2158         struct ib_uverbs_post_send_resp resp;
2159         struct ib_uverbs_send_wr       *user_wr;
2160         struct ib_send_wr              *wr = NULL, *last, *next, *bad_wr;
2161         struct ib_qp                   *qp;
2162         int                             i, sg_ind;
2163         int                             is_ud;
2164         ssize_t                         ret = -EINVAL;
2165         size_t                          next_size;
2166
2167         if (copy_from_user(&cmd, buf, sizeof cmd))
2168                 return -EFAULT;
2169
2170         if (in_len < sizeof cmd + cmd.wqe_size * cmd.wr_count +
2171             cmd.sge_count * sizeof (struct ib_uverbs_sge))
2172                 return -EINVAL;
2173
2174         if (cmd.wqe_size < sizeof (struct ib_uverbs_send_wr))
2175                 return -EINVAL;
2176
2177         user_wr = kmalloc(cmd.wqe_size, GFP_KERNEL);
2178         if (!user_wr)
2179                 return -ENOMEM;
2180
2181         qp = uobj_get_obj_read(qp, cmd.qp_handle, file->ucontext);
2182         if (!qp)
2183                 goto out;
2184
2185         is_ud = qp->qp_type == IB_QPT_UD;
2186         sg_ind = 0;
2187         last = NULL;
2188         for (i = 0; i < cmd.wr_count; ++i) {
2189                 if (copy_from_user(user_wr,
2190                                    buf + sizeof cmd + i * cmd.wqe_size,
2191                                    cmd.wqe_size)) {
2192                         ret = -EFAULT;
2193                         goto out_put;
2194                 }
2195
2196                 if (user_wr->num_sge + sg_ind > cmd.sge_count) {
2197                         ret = -EINVAL;
2198                         goto out_put;
2199                 }
2200
2201                 if (is_ud) {
2202                         struct ib_ud_wr *ud;
2203
2204                         if (user_wr->opcode != IB_WR_SEND &&
2205                             user_wr->opcode != IB_WR_SEND_WITH_IMM) {
2206                                 ret = -EINVAL;
2207                                 goto out_put;
2208                         }
2209
2210                         next_size = sizeof(*ud);
2211                         ud = alloc_wr(next_size, user_wr->num_sge);
2212                         if (!ud) {
2213                                 ret = -ENOMEM;
2214                                 goto out_put;
2215                         }
2216
2217                         ud->ah = uobj_get_obj_read(ah, user_wr->wr.ud.ah,
2218                                                    file->ucontext);
2219                         if (!ud->ah) {
2220                                 kfree(ud);
2221                                 ret = -EINVAL;
2222                                 goto out_put;
2223                         }
2224                         ud->remote_qpn = user_wr->wr.ud.remote_qpn;
2225                         ud->remote_qkey = user_wr->wr.ud.remote_qkey;
2226
2227                         next = &ud->wr;
2228                 } else if (user_wr->opcode == IB_WR_RDMA_WRITE_WITH_IMM ||
2229                            user_wr->opcode == IB_WR_RDMA_WRITE ||
2230                            user_wr->opcode == IB_WR_RDMA_READ) {
2231                         struct ib_rdma_wr *rdma;
2232
2233                         next_size = sizeof(*rdma);
2234                         rdma = alloc_wr(next_size, user_wr->num_sge);
2235                         if (!rdma) {
2236                                 ret = -ENOMEM;
2237                                 goto out_put;
2238                         }
2239
2240                         rdma->remote_addr = user_wr->wr.rdma.remote_addr;
2241                         rdma->rkey = user_wr->wr.rdma.rkey;
2242
2243                         next = &rdma->wr;
2244                 } else if (user_wr->opcode == IB_WR_ATOMIC_CMP_AND_SWP ||
2245                            user_wr->opcode == IB_WR_ATOMIC_FETCH_AND_ADD) {
2246                         struct ib_atomic_wr *atomic;
2247
2248                         next_size = sizeof(*atomic);
2249                         atomic = alloc_wr(next_size, user_wr->num_sge);
2250                         if (!atomic) {
2251                                 ret = -ENOMEM;
2252                                 goto out_put;
2253                         }
2254
2255                         atomic->remote_addr = user_wr->wr.atomic.remote_addr;
2256                         atomic->compare_add = user_wr->wr.atomic.compare_add;
2257                         atomic->swap = user_wr->wr.atomic.swap;
2258                         atomic->rkey = user_wr->wr.atomic.rkey;
2259
2260                         next = &atomic->wr;
2261                 } else if (user_wr->opcode == IB_WR_SEND ||
2262                            user_wr->opcode == IB_WR_SEND_WITH_IMM ||
2263                            user_wr->opcode == IB_WR_SEND_WITH_INV) {
2264                         next_size = sizeof(*next);
2265                         next = alloc_wr(next_size, user_wr->num_sge);
2266                         if (!next) {
2267                                 ret = -ENOMEM;
2268                                 goto out_put;
2269                         }
2270                 } else {
2271                         ret = -EINVAL;
2272                         goto out_put;
2273                 }
2274
2275                 if (user_wr->opcode == IB_WR_SEND_WITH_IMM ||
2276                     user_wr->opcode == IB_WR_RDMA_WRITE_WITH_IMM) {
2277                         next->ex.imm_data =
2278                                         (__be32 __force) user_wr->ex.imm_data;
2279                 } else if (user_wr->opcode == IB_WR_SEND_WITH_INV) {
2280                         next->ex.invalidate_rkey = user_wr->ex.invalidate_rkey;
2281                 }
2282
2283                 if (!last)
2284                         wr = next;
2285                 else
2286                         last->next = next;
2287                 last = next;
2288
2289                 next->next       = NULL;
2290                 next->wr_id      = user_wr->wr_id;
2291                 next->num_sge    = user_wr->num_sge;
2292                 next->opcode     = user_wr->opcode;
2293                 next->send_flags = user_wr->send_flags;
2294
2295                 if (next->num_sge) {
2296                         next->sg_list = (void *) next +
2297                                 ALIGN(next_size, sizeof(struct ib_sge));
2298                         if (copy_from_user(next->sg_list,
2299                                            buf + sizeof cmd +
2300                                            cmd.wr_count * cmd.wqe_size +
2301                                            sg_ind * sizeof (struct ib_sge),
2302                                            next->num_sge * sizeof (struct ib_sge))) {
2303                                 ret = -EFAULT;
2304                                 goto out_put;
2305                         }
2306                         sg_ind += next->num_sge;
2307                 } else
2308                         next->sg_list = NULL;
2309         }
2310
2311         resp.bad_wr = 0;
2312         ret = qp->device->post_send(qp->real_qp, wr, &bad_wr);
2313         if (ret)
2314                 for (next = wr; next; next = next->next) {
2315                         ++resp.bad_wr;
2316                         if (next == bad_wr)
2317                                 break;
2318                 }
2319
2320         if (copy_to_user(u64_to_user_ptr(cmd.response), &resp, sizeof resp))
2321                 ret = -EFAULT;
2322
2323 out_put:
2324         uobj_put_obj_read(qp);
2325
2326         while (wr) {
2327                 if (is_ud && ud_wr(wr)->ah)
2328                         uobj_put_obj_read(ud_wr(wr)->ah);
2329                 next = wr->next;
2330                 kfree(wr);
2331                 wr = next;
2332         }
2333
2334 out:
2335         kfree(user_wr);
2336
2337         return ret ? ret : in_len;
2338 }
2339
2340 static struct ib_recv_wr *ib_uverbs_unmarshall_recv(const char __user *buf,
2341                                                     int in_len,
2342                                                     u32 wr_count,
2343                                                     u32 sge_count,
2344                                                     u32 wqe_size)
2345 {
2346         struct ib_uverbs_recv_wr *user_wr;
2347         struct ib_recv_wr        *wr = NULL, *last, *next;
2348         int                       sg_ind;
2349         int                       i;
2350         int                       ret;
2351
2352         if (in_len < wqe_size * wr_count +
2353             sge_count * sizeof (struct ib_uverbs_sge))
2354                 return ERR_PTR(-EINVAL);
2355
2356         if (wqe_size < sizeof (struct ib_uverbs_recv_wr))
2357                 return ERR_PTR(-EINVAL);
2358
2359         user_wr = kmalloc(wqe_size, GFP_KERNEL);
2360         if (!user_wr)
2361                 return ERR_PTR(-ENOMEM);
2362
2363         sg_ind = 0;
2364         last = NULL;
2365         for (i = 0; i < wr_count; ++i) {
2366                 if (copy_from_user(user_wr, buf + i * wqe_size,
2367                                    wqe_size)) {
2368                         ret = -EFAULT;
2369                         goto err;
2370                 }
2371
2372                 if (user_wr->num_sge + sg_ind > sge_count) {
2373                         ret = -EINVAL;
2374                         goto err;
2375                 }
2376
2377                 if (user_wr->num_sge >=
2378                     (U32_MAX - ALIGN(sizeof *next, sizeof (struct ib_sge))) /
2379                     sizeof (struct ib_sge)) {
2380                         ret = -EINVAL;
2381                         goto err;
2382                 }
2383
2384                 next = kmalloc(ALIGN(sizeof *next, sizeof (struct ib_sge)) +
2385                                user_wr->num_sge * sizeof (struct ib_sge),
2386                                GFP_KERNEL);
2387                 if (!next) {
2388                         ret = -ENOMEM;
2389                         goto err;
2390                 }
2391
2392                 if (!last)
2393                         wr = next;
2394                 else
2395                         last->next = next;
2396                 last = next;
2397
2398                 next->next       = NULL;
2399                 next->wr_id      = user_wr->wr_id;
2400                 next->num_sge    = user_wr->num_sge;
2401
2402                 if (next->num_sge) {
2403                         next->sg_list = (void *) next +
2404                                 ALIGN(sizeof *next, sizeof (struct ib_sge));
2405                         if (copy_from_user(next->sg_list,
2406                                            buf + wr_count * wqe_size +
2407                                            sg_ind * sizeof (struct ib_sge),
2408                                            next->num_sge * sizeof (struct ib_sge))) {
2409                                 ret = -EFAULT;
2410                                 goto err;
2411                         }
2412                         sg_ind += next->num_sge;
2413                 } else
2414                         next->sg_list = NULL;
2415         }
2416
2417         kfree(user_wr);
2418         return wr;
2419
2420 err:
2421         kfree(user_wr);
2422
2423         while (wr) {
2424                 next = wr->next;
2425                 kfree(wr);
2426                 wr = next;
2427         }
2428
2429         return ERR_PTR(ret);
2430 }
2431
2432 ssize_t ib_uverbs_post_recv(struct ib_uverbs_file *file,
2433                             struct ib_device *ib_dev,
2434                             const char __user *buf, int in_len,
2435                             int out_len)
2436 {
2437         struct ib_uverbs_post_recv      cmd;
2438         struct ib_uverbs_post_recv_resp resp;
2439         struct ib_recv_wr              *wr, *next, *bad_wr;
2440         struct ib_qp                   *qp;
2441         ssize_t                         ret = -EINVAL;
2442
2443         if (copy_from_user(&cmd, buf, sizeof cmd))
2444                 return -EFAULT;
2445
2446         wr = ib_uverbs_unmarshall_recv(buf + sizeof cmd,
2447                                        in_len - sizeof cmd, cmd.wr_count,
2448                                        cmd.sge_count, cmd.wqe_size);
2449         if (IS_ERR(wr))
2450                 return PTR_ERR(wr);
2451
2452         qp = uobj_get_obj_read(qp, cmd.qp_handle, file->ucontext);
2453         if (!qp)
2454                 goto out;
2455
2456         resp.bad_wr = 0;
2457         ret = qp->device->post_recv(qp->real_qp, wr, &bad_wr);
2458
2459         uobj_put_obj_read(qp);
2460         if (ret) {
2461                 for (next = wr; next; next = next->next) {
2462                         ++resp.bad_wr;
2463                         if (next == bad_wr)
2464                                 break;
2465                 }
2466         }
2467
2468         if (copy_to_user(u64_to_user_ptr(cmd.response), &resp, sizeof resp))
2469                 ret = -EFAULT;
2470
2471 out:
2472         while (wr) {
2473                 next = wr->next;
2474                 kfree(wr);
2475                 wr = next;
2476         }
2477
2478         return ret ? ret : in_len;
2479 }
2480
2481 ssize_t ib_uverbs_post_srq_recv(struct ib_uverbs_file *file,
2482                                 struct ib_device *ib_dev,
2483                                 const char __user *buf, int in_len,
2484                                 int out_len)
2485 {
2486         struct ib_uverbs_post_srq_recv      cmd;
2487         struct ib_uverbs_post_srq_recv_resp resp;
2488         struct ib_recv_wr                  *wr, *next, *bad_wr;
2489         struct ib_srq                      *srq;
2490         ssize_t                             ret = -EINVAL;
2491
2492         if (copy_from_user(&cmd, buf, sizeof cmd))
2493                 return -EFAULT;
2494
2495         wr = ib_uverbs_unmarshall_recv(buf + sizeof cmd,
2496                                        in_len - sizeof cmd, cmd.wr_count,
2497                                        cmd.sge_count, cmd.wqe_size);
2498         if (IS_ERR(wr))
2499                 return PTR_ERR(wr);
2500
2501         srq = uobj_get_obj_read(srq, cmd.srq_handle, file->ucontext);
2502         if (!srq)
2503                 goto out;
2504
2505         resp.bad_wr = 0;
2506         ret = srq->device->post_srq_recv(srq, wr, &bad_wr);
2507
2508         uobj_put_obj_read(srq);
2509
2510         if (ret)
2511                 for (next = wr; next; next = next->next) {
2512                         ++resp.bad_wr;
2513                         if (next == bad_wr)
2514                                 break;
2515                 }
2516
2517         if (copy_to_user(u64_to_user_ptr(cmd.response), &resp, sizeof resp))
2518                 ret = -EFAULT;
2519
2520 out:
2521         while (wr) {
2522                 next = wr->next;
2523                 kfree(wr);
2524                 wr = next;
2525         }
2526
2527         return ret ? ret : in_len;
2528 }
2529
2530 ssize_t ib_uverbs_create_ah(struct ib_uverbs_file *file,
2531                             struct ib_device *ib_dev,
2532                             const char __user *buf, int in_len,
2533                             int out_len)
2534 {
2535         struct ib_uverbs_create_ah       cmd;
2536         struct ib_uverbs_create_ah_resp  resp;
2537         struct ib_uobject               *uobj;
2538         struct ib_pd                    *pd;
2539         struct ib_ah                    *ah;
2540         struct rdma_ah_attr             attr;
2541         int ret;
2542         struct ib_udata                   udata;
2543
2544         if (out_len < sizeof resp)
2545                 return -ENOSPC;
2546
2547         if (copy_from_user(&cmd, buf, sizeof cmd))
2548                 return -EFAULT;
2549
2550         if (!rdma_is_port_valid(ib_dev, cmd.attr.port_num))
2551                 return -EINVAL;
2552
2553         ib_uverbs_init_udata(&udata, buf + sizeof(cmd),
2554                    u64_to_user_ptr(cmd.response) + sizeof(resp),
2555                    in_len - sizeof(cmd) - sizeof(struct ib_uverbs_cmd_hdr),
2556                    out_len - sizeof(resp));
2557
2558         uobj  = uobj_alloc(uobj_get_type(ah), file->ucontext);
2559         if (IS_ERR(uobj))
2560                 return PTR_ERR(uobj);
2561
2562         pd = uobj_get_obj_read(pd, cmd.pd_handle, file->ucontext);
2563         if (!pd) {
2564                 ret = -EINVAL;
2565                 goto err;
2566         }
2567
2568         attr.type = rdma_ah_find_type(ib_dev, cmd.attr.port_num);
2569         rdma_ah_set_make_grd(&attr, false);
2570         rdma_ah_set_dlid(&attr, cmd.attr.dlid);
2571         rdma_ah_set_sl(&attr, cmd.attr.sl);
2572         rdma_ah_set_path_bits(&attr, cmd.attr.src_path_bits);
2573         rdma_ah_set_static_rate(&attr, cmd.attr.static_rate);
2574         rdma_ah_set_port_num(&attr, cmd.attr.port_num);
2575
2576         if (cmd.attr.is_global) {
2577                 rdma_ah_set_grh(&attr, NULL, cmd.attr.grh.flow_label,
2578                                 cmd.attr.grh.sgid_index,
2579                                 cmd.attr.grh.hop_limit,
2580                                 cmd.attr.grh.traffic_class);
2581                 rdma_ah_set_dgid_raw(&attr, cmd.attr.grh.dgid);
2582         } else {
2583                 rdma_ah_set_ah_flags(&attr, 0);
2584         }
2585
2586         ah = rdma_create_user_ah(pd, &attr, &udata);
2587         if (IS_ERR(ah)) {
2588                 ret = PTR_ERR(ah);
2589                 goto err_put;
2590         }
2591
2592         ah->uobject  = uobj;
2593         uobj->user_handle = cmd.user_handle;
2594         uobj->object = ah;
2595
2596         resp.ah_handle = uobj->id;
2597
2598         if (copy_to_user(u64_to_user_ptr(cmd.response), &resp, sizeof resp)) {
2599                 ret = -EFAULT;
2600                 goto err_copy;
2601         }
2602
2603         uobj_put_obj_read(pd);
2604         uobj_alloc_commit(uobj);
2605
2606         return in_len;
2607
2608 err_copy:
2609         rdma_destroy_ah(ah);
2610
2611 err_put:
2612         uobj_put_obj_read(pd);
2613
2614 err:
2615         uobj_alloc_abort(uobj);
2616         return ret;
2617 }
2618
2619 ssize_t ib_uverbs_destroy_ah(struct ib_uverbs_file *file,
2620                              struct ib_device *ib_dev,
2621                              const char __user *buf, int in_len, int out_len)
2622 {
2623         struct ib_uverbs_destroy_ah cmd;
2624         struct ib_uobject          *uobj;
2625         int                         ret;
2626
2627         if (copy_from_user(&cmd, buf, sizeof cmd))
2628                 return -EFAULT;
2629
2630         uobj  = uobj_get_write(uobj_get_type(ah), cmd.ah_handle,
2631                                file->ucontext);
2632         if (IS_ERR(uobj))
2633                 return PTR_ERR(uobj);
2634
2635         ret = uobj_remove_commit(uobj);
2636         return ret ?: in_len;
2637 }
2638
2639 ssize_t ib_uverbs_attach_mcast(struct ib_uverbs_file *file,
2640                                struct ib_device *ib_dev,
2641                                const char __user *buf, int in_len,
2642                                int out_len)
2643 {
2644         struct ib_uverbs_attach_mcast cmd;
2645         struct ib_qp                 *qp;
2646         struct ib_uqp_object         *obj;
2647         struct ib_uverbs_mcast_entry *mcast;
2648         int                           ret;
2649
2650         if (copy_from_user(&cmd, buf, sizeof cmd))
2651                 return -EFAULT;
2652
2653         qp = uobj_get_obj_read(qp, cmd.qp_handle, file->ucontext);
2654         if (!qp)
2655                 return -EINVAL;
2656
2657         obj = container_of(qp->uobject, struct ib_uqp_object, uevent.uobject);
2658
2659         mutex_lock(&obj->mcast_lock);
2660         list_for_each_entry(mcast, &obj->mcast_list, list)
2661                 if (cmd.mlid == mcast->lid &&
2662                     !memcmp(cmd.gid, mcast->gid.raw, sizeof mcast->gid.raw)) {
2663                         ret = 0;
2664                         goto out_put;
2665                 }
2666
2667         mcast = kmalloc(sizeof *mcast, GFP_KERNEL);
2668         if (!mcast) {
2669                 ret = -ENOMEM;
2670                 goto out_put;
2671         }
2672
2673         mcast->lid = cmd.mlid;
2674         memcpy(mcast->gid.raw, cmd.gid, sizeof mcast->gid.raw);
2675
2676         ret = ib_attach_mcast(qp, &mcast->gid, cmd.mlid);
2677         if (!ret)
2678                 list_add_tail(&mcast->list, &obj->mcast_list);
2679         else
2680                 kfree(mcast);
2681
2682 out_put:
2683         mutex_unlock(&obj->mcast_lock);
2684         uobj_put_obj_read(qp);
2685
2686         return ret ? ret : in_len;
2687 }
2688
2689 ssize_t ib_uverbs_detach_mcast(struct ib_uverbs_file *file,
2690                                struct ib_device *ib_dev,
2691                                const char __user *buf, int in_len,
2692                                int out_len)
2693 {
2694         struct ib_uverbs_detach_mcast cmd;
2695         struct ib_uqp_object         *obj;
2696         struct ib_qp                 *qp;
2697         struct ib_uverbs_mcast_entry *mcast;
2698         int                           ret = -EINVAL;
2699         bool                          found = false;
2700
2701         if (copy_from_user(&cmd, buf, sizeof cmd))
2702                 return -EFAULT;
2703
2704         qp = uobj_get_obj_read(qp, cmd.qp_handle, file->ucontext);
2705         if (!qp)
2706                 return -EINVAL;
2707
2708         obj = container_of(qp->uobject, struct ib_uqp_object, uevent.uobject);
2709         mutex_lock(&obj->mcast_lock);
2710
2711         list_for_each_entry(mcast, &obj->mcast_list, list)
2712                 if (cmd.mlid == mcast->lid &&
2713                     !memcmp(cmd.gid, mcast->gid.raw, sizeof mcast->gid.raw)) {
2714                         list_del(&mcast->list);
2715                         kfree(mcast);
2716                         found = true;
2717                         break;
2718                 }
2719
2720         if (!found) {
2721                 ret = -EINVAL;
2722                 goto out_put;
2723         }
2724
2725         ret = ib_detach_mcast(qp, (union ib_gid *)cmd.gid, cmd.mlid);
2726
2727 out_put:
2728         mutex_unlock(&obj->mcast_lock);
2729         uobj_put_obj_read(qp);
2730         return ret ? ret : in_len;
2731 }
2732
2733 static int kern_spec_to_ib_spec_action(struct ib_uverbs_flow_spec *kern_spec,
2734                                        union ib_flow_spec *ib_spec)
2735 {
2736         ib_spec->type = kern_spec->type;
2737         switch (ib_spec->type) {
2738         case IB_FLOW_SPEC_ACTION_TAG:
2739                 if (kern_spec->flow_tag.size !=
2740                     sizeof(struct ib_uverbs_flow_spec_action_tag))
2741                         return -EINVAL;
2742
2743                 ib_spec->flow_tag.size = sizeof(struct ib_flow_spec_action_tag);
2744                 ib_spec->flow_tag.tag_id = kern_spec->flow_tag.tag_id;
2745                 break;
2746         case IB_FLOW_SPEC_ACTION_DROP:
2747                 if (kern_spec->drop.size !=
2748                     sizeof(struct ib_uverbs_flow_spec_action_drop))
2749                         return -EINVAL;
2750
2751                 ib_spec->drop.size = sizeof(struct ib_flow_spec_action_drop);
2752                 break;
2753         default:
2754                 return -EINVAL;
2755         }
2756         return 0;
2757 }
2758
2759 static size_t kern_spec_filter_sz(struct ib_uverbs_flow_spec_hdr *spec)
2760 {
2761         /* Returns user space filter size, includes padding */
2762         return (spec->size - sizeof(struct ib_uverbs_flow_spec_hdr)) / 2;
2763 }
2764
2765 static ssize_t spec_filter_size(void *kern_spec_filter, u16 kern_filter_size,
2766                                 u16 ib_real_filter_sz)
2767 {
2768         /*
2769          * User space filter structures must be 64 bit aligned, otherwise this
2770          * may pass, but we won't handle additional new attributes.
2771          */
2772
2773         if (kern_filter_size > ib_real_filter_sz) {
2774                 if (memchr_inv(kern_spec_filter +
2775                                ib_real_filter_sz, 0,
2776                                kern_filter_size - ib_real_filter_sz))
2777                         return -EINVAL;
2778                 return ib_real_filter_sz;
2779         }
2780         return kern_filter_size;
2781 }
2782
2783 static int kern_spec_to_ib_spec_filter(struct ib_uverbs_flow_spec *kern_spec,
2784                                        union ib_flow_spec *ib_spec)
2785 {
2786         ssize_t actual_filter_sz;
2787         ssize_t kern_filter_sz;
2788         ssize_t ib_filter_sz;
2789         void *kern_spec_mask;
2790         void *kern_spec_val;
2791
2792         if (kern_spec->reserved)
2793                 return -EINVAL;
2794
2795         ib_spec->type = kern_spec->type;
2796
2797         kern_filter_sz = kern_spec_filter_sz(&kern_spec->hdr);
2798         /* User flow spec size must be aligned to 4 bytes */
2799         if (kern_filter_sz != ALIGN(kern_filter_sz, 4))
2800                 return -EINVAL;
2801
2802         kern_spec_val = (void *)kern_spec +
2803                 sizeof(struct ib_uverbs_flow_spec_hdr);
2804         kern_spec_mask = kern_spec_val + kern_filter_sz;
2805         if (ib_spec->type == (IB_FLOW_SPEC_INNER | IB_FLOW_SPEC_VXLAN_TUNNEL))
2806                 return -EINVAL;
2807
2808         switch (ib_spec->type & ~IB_FLOW_SPEC_INNER) {
2809         case IB_FLOW_SPEC_ETH:
2810                 ib_filter_sz = offsetof(struct ib_flow_eth_filter, real_sz);
2811                 actual_filter_sz = spec_filter_size(kern_spec_mask,
2812                                                     kern_filter_sz,
2813                                                     ib_filter_sz);
2814                 if (actual_filter_sz <= 0)
2815                         return -EINVAL;
2816                 ib_spec->size = sizeof(struct ib_flow_spec_eth);
2817                 memcpy(&ib_spec->eth.val, kern_spec_val, actual_filter_sz);
2818                 memcpy(&ib_spec->eth.mask, kern_spec_mask, actual_filter_sz);
2819                 break;
2820         case IB_FLOW_SPEC_IPV4:
2821                 ib_filter_sz = offsetof(struct ib_flow_ipv4_filter, real_sz);
2822                 actual_filter_sz = spec_filter_size(kern_spec_mask,
2823                                                     kern_filter_sz,
2824                                                     ib_filter_sz);
2825                 if (actual_filter_sz <= 0)
2826                         return -EINVAL;
2827                 ib_spec->size = sizeof(struct ib_flow_spec_ipv4);
2828                 memcpy(&ib_spec->ipv4.val, kern_spec_val, actual_filter_sz);
2829                 memcpy(&ib_spec->ipv4.mask, kern_spec_mask, actual_filter_sz);
2830                 break;
2831         case IB_FLOW_SPEC_IPV6:
2832                 ib_filter_sz = offsetof(struct ib_flow_ipv6_filter, real_sz);
2833                 actual_filter_sz = spec_filter_size(kern_spec_mask,
2834                                                     kern_filter_sz,
2835                                                     ib_filter_sz);
2836                 if (actual_filter_sz <= 0)
2837                         return -EINVAL;
2838                 ib_spec->size = sizeof(struct ib_flow_spec_ipv6);
2839                 memcpy(&ib_spec->ipv6.val, kern_spec_val, actual_filter_sz);
2840                 memcpy(&ib_spec->ipv6.mask, kern_spec_mask, actual_filter_sz);
2841
2842                 if ((ntohl(ib_spec->ipv6.mask.flow_label)) >= BIT(20) ||
2843                     (ntohl(ib_spec->ipv6.val.flow_label)) >= BIT(20))
2844                         return -EINVAL;
2845                 break;
2846         case IB_FLOW_SPEC_TCP:
2847         case IB_FLOW_SPEC_UDP:
2848                 ib_filter_sz = offsetof(struct ib_flow_tcp_udp_filter, real_sz);
2849                 actual_filter_sz = spec_filter_size(kern_spec_mask,
2850                                                     kern_filter_sz,
2851                                                     ib_filter_sz);
2852                 if (actual_filter_sz <= 0)
2853                         return -EINVAL;
2854                 ib_spec->size = sizeof(struct ib_flow_spec_tcp_udp);
2855                 memcpy(&ib_spec->tcp_udp.val, kern_spec_val, actual_filter_sz);
2856                 memcpy(&ib_spec->tcp_udp.mask, kern_spec_mask, actual_filter_sz);
2857                 break;
2858         case IB_FLOW_SPEC_VXLAN_TUNNEL:
2859                 ib_filter_sz = offsetof(struct ib_flow_tunnel_filter, real_sz);
2860                 actual_filter_sz = spec_filter_size(kern_spec_mask,
2861                                                     kern_filter_sz,
2862                                                     ib_filter_sz);
2863                 if (actual_filter_sz <= 0)
2864                         return -EINVAL;
2865                 ib_spec->tunnel.size = sizeof(struct ib_flow_spec_tunnel);
2866                 memcpy(&ib_spec->tunnel.val, kern_spec_val, actual_filter_sz);
2867                 memcpy(&ib_spec->tunnel.mask, kern_spec_mask, actual_filter_sz);
2868
2869                 if ((ntohl(ib_spec->tunnel.mask.tunnel_id)) >= BIT(24) ||
2870                     (ntohl(ib_spec->tunnel.val.tunnel_id)) >= BIT(24))
2871                         return -EINVAL;
2872                 break;
2873         default:
2874                 return -EINVAL;
2875         }
2876         return 0;
2877 }
2878
2879 static int kern_spec_to_ib_spec(struct ib_uverbs_flow_spec *kern_spec,
2880                                 union ib_flow_spec *ib_spec)
2881 {
2882         if (kern_spec->reserved)
2883                 return -EINVAL;
2884
2885         if (kern_spec->type >= IB_FLOW_SPEC_ACTION_TAG)
2886                 return kern_spec_to_ib_spec_action(kern_spec, ib_spec);
2887         else
2888                 return kern_spec_to_ib_spec_filter(kern_spec, ib_spec);
2889 }
2890
2891 int ib_uverbs_ex_create_wq(struct ib_uverbs_file *file,
2892                            struct ib_device *ib_dev,
2893                            struct ib_udata *ucore,
2894                            struct ib_udata *uhw)
2895 {
2896         struct ib_uverbs_ex_create_wq     cmd = {};
2897         struct ib_uverbs_ex_create_wq_resp resp = {};
2898         struct ib_uwq_object           *obj;
2899         int err = 0;
2900         struct ib_cq *cq;
2901         struct ib_pd *pd;
2902         struct ib_wq *wq;
2903         struct ib_wq_init_attr wq_init_attr = {};
2904         size_t required_cmd_sz;
2905         size_t required_resp_len;
2906
2907         required_cmd_sz = offsetof(typeof(cmd), max_sge) + sizeof(cmd.max_sge);
2908         required_resp_len = offsetof(typeof(resp), wqn) + sizeof(resp.wqn);
2909
2910         if (ucore->inlen < required_cmd_sz)
2911                 return -EINVAL;
2912
2913         if (ucore->outlen < required_resp_len)
2914                 return -ENOSPC;
2915
2916         if (ucore->inlen > sizeof(cmd) &&
2917             !ib_is_udata_cleared(ucore, sizeof(cmd),
2918                                  ucore->inlen - sizeof(cmd)))
2919                 return -EOPNOTSUPP;
2920
2921         err = ib_copy_from_udata(&cmd, ucore, min(sizeof(cmd), ucore->inlen));
2922         if (err)
2923                 return err;
2924
2925         if (cmd.comp_mask)
2926                 return -EOPNOTSUPP;
2927
2928         obj  = (struct ib_uwq_object *)uobj_alloc(uobj_get_type(wq),
2929                                                   file->ucontext);
2930         if (IS_ERR(obj))
2931                 return PTR_ERR(obj);
2932
2933         pd  = uobj_get_obj_read(pd, cmd.pd_handle, file->ucontext);
2934         if (!pd) {
2935                 err = -EINVAL;
2936                 goto err_uobj;
2937         }
2938
2939         cq = uobj_get_obj_read(cq, cmd.cq_handle, file->ucontext);
2940         if (!cq) {
2941                 err = -EINVAL;
2942                 goto err_put_pd;
2943         }
2944
2945         wq_init_attr.cq = cq;
2946         wq_init_attr.max_sge = cmd.max_sge;
2947         wq_init_attr.max_wr = cmd.max_wr;
2948         wq_init_attr.wq_context = file;
2949         wq_init_attr.wq_type = cmd.wq_type;
2950         wq_init_attr.event_handler = ib_uverbs_wq_event_handler;
2951         if (ucore->inlen >= (offsetof(typeof(cmd), create_flags) +
2952                              sizeof(cmd.create_flags)))
2953                 wq_init_attr.create_flags = cmd.create_flags;
2954         obj->uevent.events_reported = 0;
2955         INIT_LIST_HEAD(&obj->uevent.event_list);
2956
2957         if (!pd->device->create_wq) {
2958                 err = -EOPNOTSUPP;
2959                 goto err_put_cq;
2960         }
2961         wq = pd->device->create_wq(pd, &wq_init_attr, uhw);
2962         if (IS_ERR(wq)) {
2963                 err = PTR_ERR(wq);
2964                 goto err_put_cq;
2965         }
2966
2967         wq->uobject = &obj->uevent.uobject;
2968         obj->uevent.uobject.object = wq;
2969         wq->wq_type = wq_init_attr.wq_type;
2970         wq->cq = cq;
2971         wq->pd = pd;
2972         wq->device = pd->device;
2973         wq->wq_context = wq_init_attr.wq_context;
2974         atomic_set(&wq->usecnt, 0);
2975         atomic_inc(&pd->usecnt);
2976         atomic_inc(&cq->usecnt);
2977         wq->uobject = &obj->uevent.uobject;
2978         obj->uevent.uobject.object = wq;
2979
2980         memset(&resp, 0, sizeof(resp));
2981         resp.wq_handle = obj->uevent.uobject.id;
2982         resp.max_sge = wq_init_attr.max_sge;
2983         resp.max_wr = wq_init_attr.max_wr;
2984         resp.wqn = wq->wq_num;
2985         resp.response_length = required_resp_len;
2986         err = ib_copy_to_udata(ucore,
2987                                &resp, resp.response_length);
2988         if (err)
2989                 goto err_copy;
2990
2991         uobj_put_obj_read(pd);
2992         uobj_put_obj_read(cq);
2993         uobj_alloc_commit(&obj->uevent.uobject);
2994         return 0;
2995
2996 err_copy:
2997         ib_destroy_wq(wq);
2998 err_put_cq:
2999         uobj_put_obj_read(cq);
3000 err_put_pd:
3001         uobj_put_obj_read(pd);
3002 err_uobj:
3003         uobj_alloc_abort(&obj->uevent.uobject);
3004
3005         return err;
3006 }
3007
3008 int ib_uverbs_ex_destroy_wq(struct ib_uverbs_file *file,
3009                             struct ib_device *ib_dev,
3010                             struct ib_udata *ucore,
3011                             struct ib_udata *uhw)
3012 {
3013         struct ib_uverbs_ex_destroy_wq  cmd = {};
3014         struct ib_uverbs_ex_destroy_wq_resp     resp = {};
3015         struct ib_uobject               *uobj;
3016         struct ib_uwq_object            *obj;
3017         size_t required_cmd_sz;
3018         size_t required_resp_len;
3019         int                             ret;
3020
3021         required_cmd_sz = offsetof(typeof(cmd), wq_handle) + sizeof(cmd.wq_handle);
3022         required_resp_len = offsetof(typeof(resp), reserved) + sizeof(resp.reserved);
3023
3024         if (ucore->inlen < required_cmd_sz)
3025                 return -EINVAL;
3026
3027         if (ucore->outlen < required_resp_len)
3028                 return -ENOSPC;
3029
3030         if (ucore->inlen > sizeof(cmd) &&
3031             !ib_is_udata_cleared(ucore, sizeof(cmd),
3032                                  ucore->inlen - sizeof(cmd)))
3033                 return -EOPNOTSUPP;
3034
3035         ret = ib_copy_from_udata(&cmd, ucore, min(sizeof(cmd), ucore->inlen));
3036         if (ret)
3037                 return ret;
3038
3039         if (cmd.comp_mask)
3040                 return -EOPNOTSUPP;
3041
3042         resp.response_length = required_resp_len;
3043         uobj  = uobj_get_write(uobj_get_type(wq), cmd.wq_handle,
3044                                file->ucontext);
3045         if (IS_ERR(uobj))
3046                 return PTR_ERR(uobj);
3047
3048         obj = container_of(uobj, struct ib_uwq_object, uevent.uobject);
3049         /*
3050          * Make sure we don't free the memory in remove_commit as we still
3051          * needs the uobject memory to create the response.
3052          */
3053         uverbs_uobject_get(uobj);
3054
3055         ret = uobj_remove_commit(uobj);
3056         resp.events_reported = obj->uevent.events_reported;
3057         uverbs_uobject_put(uobj);
3058         if (ret)
3059                 return ret;
3060
3061         return ib_copy_to_udata(ucore, &resp, resp.response_length);
3062 }
3063
3064 int ib_uverbs_ex_modify_wq(struct ib_uverbs_file *file,
3065                            struct ib_device *ib_dev,
3066                            struct ib_udata *ucore,
3067                            struct ib_udata *uhw)
3068 {
3069         struct ib_uverbs_ex_modify_wq cmd = {};
3070         struct ib_wq *wq;
3071         struct ib_wq_attr wq_attr = {};
3072         size_t required_cmd_sz;
3073         int ret;
3074
3075         required_cmd_sz = offsetof(typeof(cmd), curr_wq_state) + sizeof(cmd.curr_wq_state);
3076         if (ucore->inlen < required_cmd_sz)
3077                 return -EINVAL;
3078
3079         if (ucore->inlen > sizeof(cmd) &&
3080             !ib_is_udata_cleared(ucore, sizeof(cmd),
3081                                  ucore->inlen - sizeof(cmd)))
3082                 return -EOPNOTSUPP;
3083
3084         ret = ib_copy_from_udata(&cmd, ucore, min(sizeof(cmd), ucore->inlen));
3085         if (ret)
3086                 return ret;
3087
3088         if (!cmd.attr_mask)
3089                 return -EINVAL;
3090
3091         if (cmd.attr_mask > (IB_WQ_STATE | IB_WQ_CUR_STATE | IB_WQ_FLAGS))
3092                 return -EINVAL;
3093
3094         wq = uobj_get_obj_read(wq, cmd.wq_handle, file->ucontext);
3095         if (!wq)
3096                 return -EINVAL;
3097
3098         wq_attr.curr_wq_state = cmd.curr_wq_state;
3099         wq_attr.wq_state = cmd.wq_state;
3100         if (cmd.attr_mask & IB_WQ_FLAGS) {
3101                 wq_attr.flags = cmd.flags;
3102                 wq_attr.flags_mask = cmd.flags_mask;
3103         }
3104         if (!wq->device->modify_wq) {
3105                 ret = -EOPNOTSUPP;
3106                 goto out;
3107         }
3108         ret = wq->device->modify_wq(wq, &wq_attr, cmd.attr_mask, uhw);
3109 out:
3110         uobj_put_obj_read(wq);
3111         return ret;
3112 }
3113
3114 int ib_uverbs_ex_create_rwq_ind_table(struct ib_uverbs_file *file,
3115                                       struct ib_device *ib_dev,
3116                                       struct ib_udata *ucore,
3117                                       struct ib_udata *uhw)
3118 {
3119         struct ib_uverbs_ex_create_rwq_ind_table          cmd = {};
3120         struct ib_uverbs_ex_create_rwq_ind_table_resp  resp = {};
3121         struct ib_uobject                 *uobj;
3122         int err = 0;
3123         struct ib_rwq_ind_table_init_attr init_attr = {};
3124         struct ib_rwq_ind_table *rwq_ind_tbl;
3125         struct ib_wq    **wqs = NULL;
3126         u32 *wqs_handles = NULL;
3127         struct ib_wq    *wq = NULL;
3128         int i, j, num_read_wqs;
3129         u32 num_wq_handles;
3130         u32 expected_in_size;
3131         size_t required_cmd_sz_header;
3132         size_t required_resp_len;
3133
3134         required_cmd_sz_header = offsetof(typeof(cmd), log_ind_tbl_size) + sizeof(cmd.log_ind_tbl_size);
3135         required_resp_len = offsetof(typeof(resp), ind_tbl_num) + sizeof(resp.ind_tbl_num);
3136
3137         if (ucore->inlen < required_cmd_sz_header)
3138                 return -EINVAL;
3139
3140         if (ucore->outlen < required_resp_len)
3141                 return -ENOSPC;
3142
3143         err = ib_copy_from_udata(&cmd, ucore, required_cmd_sz_header);
3144         if (err)
3145                 return err;
3146
3147         ucore->inbuf += required_cmd_sz_header;
3148         ucore->inlen -= required_cmd_sz_header;
3149
3150         if (cmd.comp_mask)
3151                 return -EOPNOTSUPP;
3152
3153         if (cmd.log_ind_tbl_size > IB_USER_VERBS_MAX_LOG_IND_TBL_SIZE)
3154                 return -EINVAL;
3155
3156         num_wq_handles = 1 << cmd.log_ind_tbl_size;
3157         expected_in_size = num_wq_handles * sizeof(__u32);
3158         if (num_wq_handles == 1)
3159                 /* input size for wq handles is u64 aligned */
3160                 expected_in_size += sizeof(__u32);
3161
3162         if (ucore->inlen < expected_in_size)
3163                 return -EINVAL;
3164
3165         if (ucore->inlen > expected_in_size &&
3166             !ib_is_udata_cleared(ucore, expected_in_size,
3167                                  ucore->inlen - expected_in_size))
3168                 return -EOPNOTSUPP;
3169
3170         wqs_handles = kcalloc(num_wq_handles, sizeof(*wqs_handles),
3171                               GFP_KERNEL);
3172         if (!wqs_handles)
3173                 return -ENOMEM;
3174
3175