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Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris...
[linux/fpc-iii.git] / drivers / infiniband / core / uverbs_cmd.c
blobea6203ee7bccb23279a70a67c740c4fd61a85701
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
40 #include <asm/uaccess.h>
41
42 #include "uverbs.h"
43 #include "core_priv.h"
44
45 struct uverbs_lock_class {
46 struct lock_class_key key;
47 char name[16];
48 };
49
50 static struct uverbs_lock_class pd_lock_class = { .name = "PD-uobj" };
51 static struct uverbs_lock_class mr_lock_class = { .name = "MR-uobj" };
52 static struct uverbs_lock_class mw_lock_class = { .name = "MW-uobj" };
53 static struct uverbs_lock_class cq_lock_class = { .name = "CQ-uobj" };
54 static struct uverbs_lock_class qp_lock_class = { .name = "QP-uobj" };
55 static struct uverbs_lock_class ah_lock_class = { .name = "AH-uobj" };
56 static struct uverbs_lock_class srq_lock_class = { .name = "SRQ-uobj" };
57 static struct uverbs_lock_class xrcd_lock_class = { .name = "XRCD-uobj" };
58 static struct uverbs_lock_class rule_lock_class = { .name = "RULE-uobj" };
59
60 /*
61 * The ib_uobject locking scheme is as follows:
62 *
63 * - ib_uverbs_idr_lock protects the uverbs idrs themselves, so it
64 * needs to be held during all idr operations. When an object is
65 * looked up, a reference must be taken on the object's kref before
66 * dropping this lock.
67 *
68 * - Each object also has an rwsem. This rwsem must be held for
69 * reading while an operation that uses the object is performed.
70 * For example, while registering an MR, the associated PD's
71 * uobject.mutex must be held for reading. The rwsem must be held
72 * for writing while initializing or destroying an object.
73 *
74 * - In addition, each object has a "live" flag. If this flag is not
75 * set, then lookups of the object will fail even if it is found in
76 * the idr. This handles a reader that blocks and does not acquire
77 * the rwsem until after the object is destroyed. The destroy
78 * operation will set the live flag to 0 and then drop the rwsem;
79 * this will allow the reader to acquire the rwsem, see that the
80 * live flag is 0, and then drop the rwsem and its reference to
81 * object. The underlying storage will not be freed until the last
82 * reference to the object is dropped.
83 */
84
85 static void init_uobj(struct ib_uobject *uobj, u64 user_handle,
86 struct ib_ucontext *context, struct uverbs_lock_class *c)
87 {
88 uobj->user_handle = user_handle;
89 uobj->context = context;
90 kref_init(&uobj->ref);
91 init_rwsem(&uobj->mutex);
92 lockdep_set_class_and_name(&uobj->mutex, &c->key, c->name);
93 uobj->live = 0;
94 }
95
96 static void release_uobj(struct kref *kref)
97 {
98 kfree(container_of(kref, struct ib_uobject, ref));
99 }
100
101 static void put_uobj(struct ib_uobject *uobj)
102 {
103 kref_put(&uobj->ref, release_uobj);
104 }
105
106 static void put_uobj_read(struct ib_uobject *uobj)
107 {
108 up_read(&uobj->mutex);
109 put_uobj(uobj);
110 }
111
112 static void put_uobj_write(struct ib_uobject *uobj)
113 {
114 up_write(&uobj->mutex);
115 put_uobj(uobj);
116 }
117
118 static int idr_add_uobj(struct idr *idr, struct ib_uobject *uobj)
119 {
120 int ret;
121
122 idr_preload(GFP_KERNEL);
123 spin_lock(&ib_uverbs_idr_lock);
124
125 ret = idr_alloc(idr, uobj, 0, 0, GFP_NOWAIT);
126 if (ret >= 0)
127 uobj->id = ret;
128
129 spin_unlock(&ib_uverbs_idr_lock);
130 idr_preload_end();
131
132 return ret < 0 ? ret : 0;
133 }
134
135 void idr_remove_uobj(struct idr *idr, struct ib_uobject *uobj)
136 {
137 spin_lock(&ib_uverbs_idr_lock);
138 idr_remove(idr, uobj->id);
139 spin_unlock(&ib_uverbs_idr_lock);
140 }
141
142 static struct ib_uobject *__idr_get_uobj(struct idr *idr, int id,
143 struct ib_ucontext *context)
144 {
145 struct ib_uobject *uobj;
146
147 spin_lock(&ib_uverbs_idr_lock);
148 uobj = idr_find(idr, id);
149 if (uobj) {
150 if (uobj->context == context)
151 kref_get(&uobj->ref);
152 else
153 uobj = NULL;
154 }
155 spin_unlock(&ib_uverbs_idr_lock);
156
157 return uobj;
158 }
159
160 static struct ib_uobject *idr_read_uobj(struct idr *idr, int id,
161 struct ib_ucontext *context, int nested)
162 {
163 struct ib_uobject *uobj;
164
165 uobj = __idr_get_uobj(idr, id, context);
166 if (!uobj)
167 return NULL;
168
169 if (nested)
170 down_read_nested(&uobj->mutex, SINGLE_DEPTH_NESTING);
171 else
172 down_read(&uobj->mutex);
173 if (!uobj->live) {
174 put_uobj_read(uobj);
175 return NULL;
176 }
177
178 return uobj;
179 }
180
181 static struct ib_uobject *idr_write_uobj(struct idr *idr, int id,
182 struct ib_ucontext *context)
183 {
184 struct ib_uobject *uobj;
185
186 uobj = __idr_get_uobj(idr, id, context);
187 if (!uobj)
188 return NULL;
189
190 down_write(&uobj->mutex);
191 if (!uobj->live) {
192 put_uobj_write(uobj);
193 return NULL;
194 }
195
196 return uobj;
197 }
198
199 static void *idr_read_obj(struct idr *idr, int id, struct ib_ucontext *context,
200 int nested)
201 {
202 struct ib_uobject *uobj;
203
204 uobj = idr_read_uobj(idr, id, context, nested);
205 return uobj ? uobj->object : NULL;
206 }
207
208 static struct ib_pd *idr_read_pd(int pd_handle, struct ib_ucontext *context)
209 {
210 return idr_read_obj(&ib_uverbs_pd_idr, pd_handle, context, 0);
211 }
212
213 static void put_pd_read(struct ib_pd *pd)
214 {
215 put_uobj_read(pd->uobject);
216 }
217
218 static struct ib_cq *idr_read_cq(int cq_handle, struct ib_ucontext *context, int nested)
219 {
220 return idr_read_obj(&ib_uverbs_cq_idr, cq_handle, context, nested);
221 }
222
223 static void put_cq_read(struct ib_cq *cq)
224 {
225 put_uobj_read(cq->uobject);
226 }
227
228 static struct ib_ah *idr_read_ah(int ah_handle, struct ib_ucontext *context)
229 {
230 return idr_read_obj(&ib_uverbs_ah_idr, ah_handle, context, 0);
231 }
232
233 static void put_ah_read(struct ib_ah *ah)
234 {
235 put_uobj_read(ah->uobject);
236 }
237
238 static struct ib_qp *idr_read_qp(int qp_handle, struct ib_ucontext *context)
239 {
240 return idr_read_obj(&ib_uverbs_qp_idr, qp_handle, context, 0);
241 }
242
243 static struct ib_qp *idr_write_qp(int qp_handle, struct ib_ucontext *context)
244 {
245 struct ib_uobject *uobj;
246
247 uobj = idr_write_uobj(&ib_uverbs_qp_idr, qp_handle, context);
248 return uobj ? uobj->object : NULL;
249 }
250
251 static void put_qp_read(struct ib_qp *qp)
252 {
253 put_uobj_read(qp->uobject);
254 }
255
256 static void put_qp_write(struct ib_qp *qp)
257 {
258 put_uobj_write(qp->uobject);
259 }
260
261 static struct ib_srq *idr_read_srq(int srq_handle, struct ib_ucontext *context)
262 {
263 return idr_read_obj(&ib_uverbs_srq_idr, srq_handle, context, 0);
264 }
265
266 static void put_srq_read(struct ib_srq *srq)
267 {
268 put_uobj_read(srq->uobject);
269 }
270
271 static struct ib_xrcd *idr_read_xrcd(int xrcd_handle, struct ib_ucontext *context,
272 struct ib_uobject **uobj)
273 {
274 *uobj = idr_read_uobj(&ib_uverbs_xrcd_idr, xrcd_handle, context, 0);
275 return *uobj ? (*uobj)->object : NULL;
276 }
277
278 static void put_xrcd_read(struct ib_uobject *uobj)
279 {
280 put_uobj_read(uobj);
281 }
282
283 ssize_t ib_uverbs_get_context(struct ib_uverbs_file *file,
284 const char __user *buf,
285 int in_len, int out_len)
286 {
287 struct ib_uverbs_get_context cmd;
288 struct ib_uverbs_get_context_resp resp;
289 struct ib_udata udata;
290 struct ib_device *ibdev = file->device->ib_dev;
291 struct ib_ucontext *ucontext;
292 struct file *filp;
293 int ret;
294
295 if (out_len < sizeof resp)
296 return -ENOSPC;
297
298 if (copy_from_user(&cmd, buf, sizeof cmd))
299 return -EFAULT;
300
301 mutex_lock(&file->mutex);
302
303 if (file->ucontext) {
304 ret = -EINVAL;
305 goto err;
306 }
307
308 INIT_UDATA(&udata, buf + sizeof cmd,
309 (unsigned long) cmd.response + sizeof resp,
310 in_len - sizeof cmd, out_len - sizeof resp);
311
312 ucontext = ibdev->alloc_ucontext(ibdev, &udata);
313 if (IS_ERR(ucontext)) {
314 ret = PTR_ERR(ucontext);
315 goto err;
316 }
317
318 ucontext->device = ibdev;
319 INIT_LIST_HEAD(&ucontext->pd_list);
320 INIT_LIST_HEAD(&ucontext->mr_list);
321 INIT_LIST_HEAD(&ucontext->mw_list);
322 INIT_LIST_HEAD(&ucontext->cq_list);
323 INIT_LIST_HEAD(&ucontext->qp_list);
324 INIT_LIST_HEAD(&ucontext->srq_list);
325 INIT_LIST_HEAD(&ucontext->ah_list);
326 INIT_LIST_HEAD(&ucontext->xrcd_list);
327 INIT_LIST_HEAD(&ucontext->rule_list);
328 ucontext->closing = 0;
329
330 resp.num_comp_vectors = file->device->num_comp_vectors;
331
332 ret = get_unused_fd_flags(O_CLOEXEC);
333 if (ret < 0)
334 goto err_free;
335 resp.async_fd = ret;
336
337 filp = ib_uverbs_alloc_event_file(file, 1);
338 if (IS_ERR(filp)) {
339 ret = PTR_ERR(filp);
340 goto err_fd;
341 }
342
343 if (copy_to_user((void __user *) (unsigned long) cmd.response,
344 &resp, sizeof resp)) {
345 ret = -EFAULT;
346 goto err_file;
347 }
348
349 file->async_file = filp->private_data;
350
351 INIT_IB_EVENT_HANDLER(&file->event_handler, file->device->ib_dev,
352 ib_uverbs_event_handler);
353 ret = ib_register_event_handler(&file->event_handler);
354 if (ret)
355 goto err_file;
356
357 kref_get(&file->async_file->ref);
358 kref_get(&file->ref);
359 file->ucontext = ucontext;
360
361 fd_install(resp.async_fd, filp);
362
363 mutex_unlock(&file->mutex);
364
365 return in_len;
366
367 err_file:
368 fput(filp);
369
370 err_fd:
371 put_unused_fd(resp.async_fd);
372
373 err_free:
374 ibdev->dealloc_ucontext(ucontext);
375
376 err:
377 mutex_unlock(&file->mutex);
378 return ret;
379 }
380
381 ssize_t ib_uverbs_query_device(struct ib_uverbs_file *file,
382 const char __user *buf,
383 int in_len, int out_len)
384 {
385 struct ib_uverbs_query_device cmd;
386 struct ib_uverbs_query_device_resp resp;
387 struct ib_device_attr attr;
388 int ret;
389
390 if (out_len < sizeof resp)
391 return -ENOSPC;
392
393 if (copy_from_user(&cmd, buf, sizeof cmd))
394 return -EFAULT;
395
396 ret = ib_query_device(file->device->ib_dev, &attr);
397 if (ret)
398 return ret;
399
400 memset(&resp, 0, sizeof resp);
401
402 resp.fw_ver = attr.fw_ver;
403 resp.node_guid = file->device->ib_dev->node_guid;
404 resp.sys_image_guid = attr.sys_image_guid;
405 resp.max_mr_size = attr.max_mr_size;
406 resp.page_size_cap = attr.page_size_cap;
407 resp.vendor_id = attr.vendor_id;
408 resp.vendor_part_id = attr.vendor_part_id;
409 resp.hw_ver = attr.hw_ver;
410 resp.max_qp = attr.max_qp;
411 resp.max_qp_wr = attr.max_qp_wr;
412 resp.device_cap_flags = attr.device_cap_flags;
413 resp.max_sge = attr.max_sge;
414 resp.max_sge_rd = attr.max_sge_rd;
415 resp.max_cq = attr.max_cq;
416 resp.max_cqe = attr.max_cqe;
417 resp.max_mr = attr.max_mr;
418 resp.max_pd = attr.max_pd;
419 resp.max_qp_rd_atom = attr.max_qp_rd_atom;
420 resp.max_ee_rd_atom = attr.max_ee_rd_atom;
421 resp.max_res_rd_atom = attr.max_res_rd_atom;
422 resp.max_qp_init_rd_atom = attr.max_qp_init_rd_atom;
423 resp.max_ee_init_rd_atom = attr.max_ee_init_rd_atom;
424 resp.atomic_cap = attr.atomic_cap;
425 resp.max_ee = attr.max_ee;
426 resp.max_rdd = attr.max_rdd;
427 resp.max_mw = attr.max_mw;
428 resp.max_raw_ipv6_qp = attr.max_raw_ipv6_qp;
429 resp.max_raw_ethy_qp = attr.max_raw_ethy_qp;
430 resp.max_mcast_grp = attr.max_mcast_grp;
431 resp.max_mcast_qp_attach = attr.max_mcast_qp_attach;
432 resp.max_total_mcast_qp_attach = attr.max_total_mcast_qp_attach;
433 resp.max_ah = attr.max_ah;
434 resp.max_fmr = attr.max_fmr;
435 resp.max_map_per_fmr = attr.max_map_per_fmr;
436 resp.max_srq = attr.max_srq;
437 resp.max_srq_wr = attr.max_srq_wr;
438 resp.max_srq_sge = attr.max_srq_sge;
439 resp.max_pkeys = attr.max_pkeys;
440 resp.local_ca_ack_delay = attr.local_ca_ack_delay;
441 resp.phys_port_cnt = file->device->ib_dev->phys_port_cnt;
442
443 if (copy_to_user((void __user *) (unsigned long) cmd.response,
444 &resp, sizeof resp))
445 return -EFAULT;
446
447 return in_len;
448 }
449
450 ssize_t ib_uverbs_query_port(struct ib_uverbs_file *file,
451 const char __user *buf,
452 int in_len, int out_len)
453 {
454 struct ib_uverbs_query_port cmd;
455 struct ib_uverbs_query_port_resp resp;
456 struct ib_port_attr attr;
457 int ret;
458
459 if (out_len < sizeof resp)
460 return -ENOSPC;
461
462 if (copy_from_user(&cmd, buf, sizeof cmd))
463 return -EFAULT;
464
465 ret = ib_query_port(file->device->ib_dev, cmd.port_num, &attr);
466 if (ret)
467 return ret;
468
469 memset(&resp, 0, sizeof resp);
470
471 resp.state = attr.state;
472 resp.max_mtu = attr.max_mtu;
473 resp.active_mtu = attr.active_mtu;
474 resp.gid_tbl_len = attr.gid_tbl_len;
475 resp.port_cap_flags = attr.port_cap_flags;
476 resp.max_msg_sz = attr.max_msg_sz;
477 resp.bad_pkey_cntr = attr.bad_pkey_cntr;
478 resp.qkey_viol_cntr = attr.qkey_viol_cntr;
479 resp.pkey_tbl_len = attr.pkey_tbl_len;
480 resp.lid = attr.lid;
481 resp.sm_lid = attr.sm_lid;
482 resp.lmc = attr.lmc;
483 resp.max_vl_num = attr.max_vl_num;
484 resp.sm_sl = attr.sm_sl;
485 resp.subnet_timeout = attr.subnet_timeout;
486 resp.init_type_reply = attr.init_type_reply;
487 resp.active_width = attr.active_width;
488 resp.active_speed = attr.active_speed;
489 resp.phys_state = attr.phys_state;
490 resp.link_layer = rdma_port_get_link_layer(file->device->ib_dev,
491 cmd.port_num);
492
493 if (copy_to_user((void __user *) (unsigned long) cmd.response,
494 &resp, sizeof resp))
495 return -EFAULT;
496
497 return in_len;
498 }
499
500 ssize_t ib_uverbs_alloc_pd(struct ib_uverbs_file *file,
501 const char __user *buf,
502 int in_len, int out_len)
503 {
504 struct ib_uverbs_alloc_pd cmd;
505 struct ib_uverbs_alloc_pd_resp resp;
506 struct ib_udata udata;
507 struct ib_uobject *uobj;
508 struct ib_pd *pd;
509 int ret;
510
511 if (out_len < sizeof resp)
512 return -ENOSPC;
513
514 if (copy_from_user(&cmd, buf, sizeof cmd))
515 return -EFAULT;
516
517 INIT_UDATA(&udata, buf + sizeof cmd,
518 (unsigned long) cmd.response + sizeof resp,
519 in_len - sizeof cmd, out_len - sizeof resp);
520
521 uobj = kmalloc(sizeof *uobj, GFP_KERNEL);
522 if (!uobj)
523 return -ENOMEM;
524
525 init_uobj(uobj, 0, file->ucontext, &pd_lock_class);
526 down_write(&uobj->mutex);
527
528 pd = file->device->ib_dev->alloc_pd(file->device->ib_dev,
529 file->ucontext, &udata);
530 if (IS_ERR(pd)) {
531 ret = PTR_ERR(pd);
532 goto err;
533 }
534
535 pd->device = file->device->ib_dev;
536 pd->uobject = uobj;
537 atomic_set(&pd->usecnt, 0);
538
539 uobj->object = pd;
540 ret = idr_add_uobj(&ib_uverbs_pd_idr, uobj);
541 if (ret)
542 goto err_idr;
543
544 memset(&resp, 0, sizeof resp);
545 resp.pd_handle = uobj->id;
546
547 if (copy_to_user((void __user *) (unsigned long) cmd.response,
548 &resp, sizeof resp)) {
549 ret = -EFAULT;
550 goto err_copy;
551 }
552
553 mutex_lock(&file->mutex);
554 list_add_tail(&uobj->list, &file->ucontext->pd_list);
555 mutex_unlock(&file->mutex);
556
557 uobj->live = 1;
558
559 up_write(&uobj->mutex);
560
561 return in_len;
562
563 err_copy:
564 idr_remove_uobj(&ib_uverbs_pd_idr, uobj);
565
566 err_idr:
567 ib_dealloc_pd(pd);
568
569 err:
570 put_uobj_write(uobj);
571 return ret;
572 }
573
574 ssize_t ib_uverbs_dealloc_pd(struct ib_uverbs_file *file,
575 const char __user *buf,
576 int in_len, int out_len)
577 {
578 struct ib_uverbs_dealloc_pd cmd;
579 struct ib_uobject *uobj;
580 int ret;
581
582 if (copy_from_user(&cmd, buf, sizeof cmd))
583 return -EFAULT;
584
585 uobj = idr_write_uobj(&ib_uverbs_pd_idr, cmd.pd_handle, file->ucontext);
586 if (!uobj)
587 return -EINVAL;
588
589 ret = ib_dealloc_pd(uobj->object);
590 if (!ret)
591 uobj->live = 0;
592
593 put_uobj_write(uobj);
594
595 if (ret)
596 return ret;
597
598 idr_remove_uobj(&ib_uverbs_pd_idr, uobj);
599
600 mutex_lock(&file->mutex);
601 list_del(&uobj->list);
602 mutex_unlock(&file->mutex);
603
604 put_uobj(uobj);
605
606 return in_len;
607 }
608
609 struct xrcd_table_entry {
610 struct rb_node node;
611 struct ib_xrcd *xrcd;
612 struct inode *inode;
613 };
614
615 static int xrcd_table_insert(struct ib_uverbs_device *dev,
616 struct inode *inode,
617 struct ib_xrcd *xrcd)
618 {
619 struct xrcd_table_entry *entry, *scan;
620 struct rb_node **p = &dev->xrcd_tree.rb_node;
621 struct rb_node *parent = NULL;
622
623 entry = kmalloc(sizeof *entry, GFP_KERNEL);
624 if (!entry)
625 return -ENOMEM;
626
627 entry->xrcd = xrcd;
628 entry->inode = inode;
629
630 while (*p) {
631 parent = *p;
632 scan = rb_entry(parent, struct xrcd_table_entry, node);
633
634 if (inode < scan->inode) {
635 p = &(*p)->rb_left;
636 } else if (inode > scan->inode) {
637 p = &(*p)->rb_right;
638 } else {
639 kfree(entry);
640 return -EEXIST;
641 }
642 }
643
644 rb_link_node(&entry->node, parent, p);
645 rb_insert_color(&entry->node, &dev->xrcd_tree);
646 igrab(inode);
647 return 0;
648 }
649
650 static struct xrcd_table_entry *xrcd_table_search(struct ib_uverbs_device *dev,
651 struct inode *inode)
652 {
653 struct xrcd_table_entry *entry;
654 struct rb_node *p = dev->xrcd_tree.rb_node;
655
656 while (p) {
657 entry = rb_entry(p, struct xrcd_table_entry, node);
658
659 if (inode < entry->inode)
660 p = p->rb_left;
661 else if (inode > entry->inode)
662 p = p->rb_right;
663 else
664 return entry;
665 }
666
667 return NULL;
668 }
669
670 static struct ib_xrcd *find_xrcd(struct ib_uverbs_device *dev, struct inode *inode)
671 {
672 struct xrcd_table_entry *entry;
673
674 entry = xrcd_table_search(dev, inode);
675 if (!entry)
676 return NULL;
677
678 return entry->xrcd;
679 }
680
681 static void xrcd_table_delete(struct ib_uverbs_device *dev,
682 struct inode *inode)
683 {
684 struct xrcd_table_entry *entry;
685
686 entry = xrcd_table_search(dev, inode);
687 if (entry) {
688 iput(inode);
689 rb_erase(&entry->node, &dev->xrcd_tree);
690 kfree(entry);
691 }
692 }
693
694 ssize_t ib_uverbs_open_xrcd(struct ib_uverbs_file *file,
695 const char __user *buf, int in_len,
696 int out_len)
697 {
698 struct ib_uverbs_open_xrcd cmd;
699 struct ib_uverbs_open_xrcd_resp resp;
700 struct ib_udata udata;
701 struct ib_uxrcd_object *obj;
702 struct ib_xrcd *xrcd = NULL;
703 struct fd f = {NULL, 0};
704 struct inode *inode = NULL;
705 int ret = 0;
706 int new_xrcd = 0;
707
708 if (out_len < sizeof resp)
709 return -ENOSPC;
710
711 if (copy_from_user(&cmd, buf, sizeof cmd))
712 return -EFAULT;
713
714 INIT_UDATA(&udata, buf + sizeof cmd,
715 (unsigned long) cmd.response + sizeof resp,
716 in_len - sizeof cmd, out_len - sizeof resp);
717
718 mutex_lock(&file->device->xrcd_tree_mutex);
719
720 if (cmd.fd != -1) {
721 /* search for file descriptor */
722 f = fdget(cmd.fd);
723 if (!f.file) {
724 ret = -EBADF;
725 goto err_tree_mutex_unlock;
726 }
727
728 inode = file_inode(f.file);
729 xrcd = find_xrcd(file->device, inode);
730 if (!xrcd && !(cmd.oflags & O_CREAT)) {
731 /* no file descriptor. Need CREATE flag */
732 ret = -EAGAIN;
733 goto err_tree_mutex_unlock;
734 }
735
736 if (xrcd && cmd.oflags & O_EXCL) {
737 ret = -EINVAL;
738 goto err_tree_mutex_unlock;
739 }
740 }
741
742 obj = kmalloc(sizeof *obj, GFP_KERNEL);
743 if (!obj) {
744 ret = -ENOMEM;
745 goto err_tree_mutex_unlock;
746 }
747
748 init_uobj(&obj->uobject, 0, file->ucontext, &xrcd_lock_class);
749
750 down_write(&obj->uobject.mutex);
751
752 if (!xrcd) {
753 xrcd = file->device->ib_dev->alloc_xrcd(file->device->ib_dev,
754 file->ucontext, &udata);
755 if (IS_ERR(xrcd)) {
756 ret = PTR_ERR(xrcd);
757 goto err;
758 }
759
760 xrcd->inode = inode;
761 xrcd->device = file->device->ib_dev;
762 atomic_set(&xrcd->usecnt, 0);
763 mutex_init(&xrcd->tgt_qp_mutex);
764 INIT_LIST_HEAD(&xrcd->tgt_qp_list);
765 new_xrcd = 1;
766 }
767
768 atomic_set(&obj->refcnt, 0);
769 obj->uobject.object = xrcd;
770 ret = idr_add_uobj(&ib_uverbs_xrcd_idr, &obj->uobject);
771 if (ret)
772 goto err_idr;
773
774 memset(&resp, 0, sizeof resp);
775 resp.xrcd_handle = obj->uobject.id;
776
777 if (inode) {
778 if (new_xrcd) {
779 /* create new inode/xrcd table entry */
780 ret = xrcd_table_insert(file->device, inode, xrcd);
781 if (ret)
782 goto err_insert_xrcd;
783 }
784 atomic_inc(&xrcd->usecnt);
785 }
786
787 if (copy_to_user((void __user *) (unsigned long) cmd.response,
788 &resp, sizeof resp)) {
789 ret = -EFAULT;
790 goto err_copy;
791 }
792
793 if (f.file)
794 fdput(f);
795
796 mutex_lock(&file->mutex);
797 list_add_tail(&obj->uobject.list, &file->ucontext->xrcd_list);
798 mutex_unlock(&file->mutex);
799
800 obj->uobject.live = 1;
801 up_write(&obj->uobject.mutex);
802
803 mutex_unlock(&file->device->xrcd_tree_mutex);
804 return in_len;
805
806 err_copy:
807 if (inode) {
808 if (new_xrcd)
809 xrcd_table_delete(file->device, inode);
810 atomic_dec(&xrcd->usecnt);
811 }
812
813 err_insert_xrcd:
814 idr_remove_uobj(&ib_uverbs_xrcd_idr, &obj->uobject);
815
816 err_idr:
817 ib_dealloc_xrcd(xrcd);
818
819 err:
820 put_uobj_write(&obj->uobject);
821
822 err_tree_mutex_unlock:
823 if (f.file)
824 fdput(f);
825
826 mutex_unlock(&file->device->xrcd_tree_mutex);
827
828 return ret;
829 }
830
831 ssize_t ib_uverbs_close_xrcd(struct ib_uverbs_file *file,
832 const char __user *buf, int in_len,
833 int out_len)
834 {
835 struct ib_uverbs_close_xrcd cmd;
836 struct ib_uobject *uobj;
837 struct ib_xrcd *xrcd = NULL;
838 struct inode *inode = NULL;
839 struct ib_uxrcd_object *obj;
840 int live;
841 int ret = 0;
842
843 if (copy_from_user(&cmd, buf, sizeof cmd))
844 return -EFAULT;
845
846 mutex_lock(&file->device->xrcd_tree_mutex);
847 uobj = idr_write_uobj(&ib_uverbs_xrcd_idr, cmd.xrcd_handle, file->ucontext);
848 if (!uobj) {
849 ret = -EINVAL;
850 goto out;
851 }
852
853 xrcd = uobj->object;
854 inode = xrcd->inode;
855 obj = container_of(uobj, struct ib_uxrcd_object, uobject);
856 if (atomic_read(&obj->refcnt)) {
857 put_uobj_write(uobj);
858 ret = -EBUSY;
859 goto out;
860 }
861
862 if (!inode || atomic_dec_and_test(&xrcd->usecnt)) {
863 ret = ib_dealloc_xrcd(uobj->object);
864 if (!ret)
865 uobj->live = 0;
866 }
867
868 live = uobj->live;
869 if (inode && ret)
870 atomic_inc(&xrcd->usecnt);
871
872 put_uobj_write(uobj);
873
874 if (ret)
875 goto out;
876
877 if (inode && !live)
878 xrcd_table_delete(file->device, inode);
879
880 idr_remove_uobj(&ib_uverbs_xrcd_idr, uobj);
881 mutex_lock(&file->mutex);
882 list_del(&uobj->list);
883 mutex_unlock(&file->mutex);
884
885 put_uobj(uobj);
886 ret = in_len;
887
888 out:
889 mutex_unlock(&file->device->xrcd_tree_mutex);
890 return ret;
891 }
892
893 void ib_uverbs_dealloc_xrcd(struct ib_uverbs_device *dev,
894 struct ib_xrcd *xrcd)
895 {
896 struct inode *inode;
897
898 inode = xrcd->inode;
899 if (inode && !atomic_dec_and_test(&xrcd->usecnt))
900 return;
901
902 ib_dealloc_xrcd(xrcd);
903
904 if (inode)
905 xrcd_table_delete(dev, inode);
906 }
907
908 ssize_t ib_uverbs_reg_mr(struct ib_uverbs_file *file,
909 const char __user *buf, int in_len,
910 int out_len)
911 {
912 struct ib_uverbs_reg_mr cmd;
913 struct ib_uverbs_reg_mr_resp resp;
914 struct ib_udata udata;
915 struct ib_uobject *uobj;
916 struct ib_pd *pd;
917 struct ib_mr *mr;
918 int ret;
919
920 if (out_len < sizeof resp)
921 return -ENOSPC;
922
923 if (copy_from_user(&cmd, buf, sizeof cmd))
924 return -EFAULT;
925
926 INIT_UDATA(&udata, buf + sizeof cmd,
927 (unsigned long) cmd.response + sizeof resp,
928 in_len - sizeof cmd, out_len - sizeof resp);
929
930 if ((cmd.start & ~PAGE_MASK) != (cmd.hca_va & ~PAGE_MASK))
931 return -EINVAL;
932
933 ret = ib_check_mr_access(cmd.access_flags);
934 if (ret)
935 return ret;
936
937 uobj = kmalloc(sizeof *uobj, GFP_KERNEL);
938 if (!uobj)
939 return -ENOMEM;
940
941 init_uobj(uobj, 0, file->ucontext, &mr_lock_class);
942 down_write(&uobj->mutex);
943
944 pd = idr_read_pd(cmd.pd_handle, file->ucontext);
945 if (!pd) {
946 ret = -EINVAL;
947 goto err_free;
948 }
949
950 mr = pd->device->reg_user_mr(pd, cmd.start, cmd.length, cmd.hca_va,
951 cmd.access_flags, &udata);
952 if (IS_ERR(mr)) {
953 ret = PTR_ERR(mr);
954 goto err_put;
955 }
956
957 mr->device = pd->device;
958 mr->pd = pd;
959 mr->uobject = uobj;
960 atomic_inc(&pd->usecnt);
961 atomic_set(&mr->usecnt, 0);
962
963 uobj->object = mr;
964 ret = idr_add_uobj(&ib_uverbs_mr_idr, uobj);
965 if (ret)
966 goto err_unreg;
967
968 memset(&resp, 0, sizeof resp);
969 resp.lkey = mr->lkey;
970 resp.rkey = mr->rkey;
971 resp.mr_handle = uobj->id;
972
973 if (copy_to_user((void __user *) (unsigned long) cmd.response,
974 &resp, sizeof resp)) {
975 ret = -EFAULT;
976 goto err_copy;
977 }
978
979 put_pd_read(pd);
980
981 mutex_lock(&file->mutex);
982 list_add_tail(&uobj->list, &file->ucontext->mr_list);
983 mutex_unlock(&file->mutex);
984
985 uobj->live = 1;
986
987 up_write(&uobj->mutex);
988
989 return in_len;
990
991 err_copy:
992 idr_remove_uobj(&ib_uverbs_mr_idr, uobj);
993
994 err_unreg:
995 ib_dereg_mr(mr);
996
997 err_put:
998 put_pd_read(pd);
999
1000 err_free:
1001 put_uobj_write(uobj);
1002 return ret;
1003 }
1004
1005 ssize_t ib_uverbs_dereg_mr(struct ib_uverbs_file *file,
1006 const char __user *buf, int in_len,
1007 int out_len)
1008 {
1009 struct ib_uverbs_dereg_mr cmd;
1010 struct ib_mr *mr;
1011 struct ib_uobject *uobj;
1012 int ret = -EINVAL;
1013
1014 if (copy_from_user(&cmd, buf, sizeof cmd))
1015 return -EFAULT;
1016
1017 uobj = idr_write_uobj(&ib_uverbs_mr_idr, cmd.mr_handle, file->ucontext);
1018 if (!uobj)
1019 return -EINVAL;
1020
1021 mr = uobj->object;
1022
1023 ret = ib_dereg_mr(mr);
1024 if (!ret)
1025 uobj->live = 0;
1026
1027 put_uobj_write(uobj);
1028
1029 if (ret)
1030 return ret;
1031
1032 idr_remove_uobj(&ib_uverbs_mr_idr, uobj);
1033
1034 mutex_lock(&file->mutex);
1035 list_del(&uobj->list);
1036 mutex_unlock(&file->mutex);
1037
1038 put_uobj(uobj);
1039
1040 return in_len;
1041 }
1042
1043 ssize_t ib_uverbs_alloc_mw(struct ib_uverbs_file *file,
1044 const char __user *buf, int in_len,
1045 int out_len)
1046 {
1047 struct ib_uverbs_alloc_mw cmd;
1048 struct ib_uverbs_alloc_mw_resp resp;
1049 struct ib_uobject *uobj;
1050 struct ib_pd *pd;
1051 struct ib_mw *mw;
1052 int ret;
1053
1054 if (out_len < sizeof(resp))
1055 return -ENOSPC;
1056
1057 if (copy_from_user(&cmd, buf, sizeof(cmd)))
1058 return -EFAULT;
1059
1060 uobj = kmalloc(sizeof(*uobj), GFP_KERNEL);
1061 if (!uobj)
1062 return -ENOMEM;
1063
1064 init_uobj(uobj, 0, file->ucontext, &mw_lock_class);
1065 down_write(&uobj->mutex);
1066
1067 pd = idr_read_pd(cmd.pd_handle, file->ucontext);
1068 if (!pd) {
1069 ret = -EINVAL;
1070 goto err_free;
1071 }
1072
1073 mw = pd->device->alloc_mw(pd, cmd.mw_type);
1074 if (IS_ERR(mw)) {
1075 ret = PTR_ERR(mw);
1076 goto err_put;
1077 }
1078
1079 mw->device = pd->device;
1080 mw->pd = pd;
1081 mw->uobject = uobj;
1082 atomic_inc(&pd->usecnt);
1083
1084 uobj->object = mw;
1085 ret = idr_add_uobj(&ib_uverbs_mw_idr, uobj);
1086 if (ret)
1087 goto err_unalloc;
1088
1089 memset(&resp, 0, sizeof(resp));
1090 resp.rkey = mw->rkey;
1091 resp.mw_handle = uobj->id;
1092
1093 if (copy_to_user((void __user *)(unsigned long)cmd.response,
1094 &resp, sizeof(resp))) {
1095 ret = -EFAULT;
1096 goto err_copy;
1097 }
1098
1099 put_pd_read(pd);
1100
1101 mutex_lock(&file->mutex);
1102 list_add_tail(&uobj->list, &file->ucontext->mw_list);
1103 mutex_unlock(&file->mutex);
1104
1105 uobj->live = 1;
1106
1107 up_write(&uobj->mutex);
1108
1109 return in_len;
1110
1111 err_copy:
1112 idr_remove_uobj(&ib_uverbs_mw_idr, uobj);
1113
1114 err_unalloc:
1115 ib_dealloc_mw(mw);
1116
1117 err_put:
1118 put_pd_read(pd);
1119
1120 err_free:
1121 put_uobj_write(uobj);
1122 return ret;
1123 }
1124
1125 ssize_t ib_uverbs_dealloc_mw(struct ib_uverbs_file *file,
1126 const char __user *buf, int in_len,
1127 int out_len)
1128 {
1129 struct ib_uverbs_dealloc_mw cmd;
1130 struct ib_mw *mw;
1131 struct ib_uobject *uobj;
1132 int ret = -EINVAL;
1133
1134 if (copy_from_user(&cmd, buf, sizeof(cmd)))
1135 return -EFAULT;
1136
1137 uobj = idr_write_uobj(&ib_uverbs_mw_idr, cmd.mw_handle, file->ucontext);
1138 if (!uobj)
1139 return -EINVAL;
1140
1141 mw = uobj->object;
1142
1143 ret = ib_dealloc_mw(mw);
1144 if (!ret)
1145 uobj->live = 0;
1146
1147 put_uobj_write(uobj);
1148
1149 if (ret)
1150 return ret;
1151
1152 idr_remove_uobj(&ib_uverbs_mw_idr, uobj);
1153
1154 mutex_lock(&file->mutex);
1155 list_del(&uobj->list);
1156 mutex_unlock(&file->mutex);
1157
1158 put_uobj(uobj);
1159
1160 return in_len;
1161 }
1162
1163 ssize_t ib_uverbs_create_comp_channel(struct ib_uverbs_file *file,
1164 const char __user *buf, int in_len,
1165 int out_len)
1166 {
1167 struct ib_uverbs_create_comp_channel cmd;
1168 struct ib_uverbs_create_comp_channel_resp resp;
1169 struct file *filp;
1170 int ret;
1171
1172 if (out_len < sizeof resp)
1173 return -ENOSPC;
1174
1175 if (copy_from_user(&cmd, buf, sizeof cmd))
1176 return -EFAULT;
1177
1178 ret = get_unused_fd_flags(O_CLOEXEC);
1179 if (ret < 0)
1180 return ret;
1181 resp.fd = ret;
1182
1183 filp = ib_uverbs_alloc_event_file(file, 0);
1184 if (IS_ERR(filp)) {
1185 put_unused_fd(resp.fd);
1186 return PTR_ERR(filp);
1187 }
1188
1189 if (copy_to_user((void __user *) (unsigned long) cmd.response,
1190 &resp, sizeof resp)) {
1191 put_unused_fd(resp.fd);
1192 fput(filp);
1193 return -EFAULT;
1194 }
1195
1196 fd_install(resp.fd, filp);
1197 return in_len;
1198 }
1199
1200 ssize_t ib_uverbs_create_cq(struct ib_uverbs_file *file,
1201 const char __user *buf, int in_len,
1202 int out_len)
1203 {
1204 struct ib_uverbs_create_cq cmd;
1205 struct ib_uverbs_create_cq_resp resp;
1206 struct ib_udata udata;
1207 struct ib_ucq_object *obj;
1208 struct ib_uverbs_event_file *ev_file = NULL;
1209 struct ib_cq *cq;
1210 int ret;
1211
1212 if (out_len < sizeof resp)
1213 return -ENOSPC;
1214
1215 if (copy_from_user(&cmd, buf, sizeof cmd))
1216 return -EFAULT;
1217
1218 INIT_UDATA(&udata, buf + sizeof cmd,
1219 (unsigned long) cmd.response + sizeof resp,
1220 in_len - sizeof cmd, out_len - sizeof resp);
1221
1222 if (cmd.comp_vector >= file->device->num_comp_vectors)
1223 return -EINVAL;
1224
1225 obj = kmalloc(sizeof *obj, GFP_KERNEL);
1226 if (!obj)
1227 return -ENOMEM;
1228
1229 init_uobj(&obj->uobject, cmd.user_handle, file->ucontext, &cq_lock_class);
1230 down_write(&obj->uobject.mutex);
1231
1232 if (cmd.comp_channel >= 0) {
1233 ev_file = ib_uverbs_lookup_comp_file(cmd.comp_channel);
1234 if (!ev_file) {
1235 ret = -EINVAL;
1236 goto err;
1237 }
1238 }
1239
1240 obj->uverbs_file = file;
1241 obj->comp_events_reported = 0;
1242 obj->async_events_reported = 0;
1243 INIT_LIST_HEAD(&obj->comp_list);
1244 INIT_LIST_HEAD(&obj->async_list);
1245
1246 cq = file->device->ib_dev->create_cq(file->device->ib_dev, cmd.cqe,
1247 cmd.comp_vector,
1248 file->ucontext, &udata);
1249 if (IS_ERR(cq)) {
1250 ret = PTR_ERR(cq);
1251 goto err_file;
1252 }
1253
1254 cq->device = file->device->ib_dev;
1255 cq->uobject = &obj->uobject;
1256 cq->comp_handler = ib_uverbs_comp_handler;
1257 cq->event_handler = ib_uverbs_cq_event_handler;
1258 cq->cq_context = ev_file;
1259 atomic_set(&cq->usecnt, 0);
1260
1261 obj->uobject.object = cq;
1262 ret = idr_add_uobj(&ib_uverbs_cq_idr, &obj->uobject);
1263 if (ret)
1264 goto err_free;
1265
1266 memset(&resp, 0, sizeof resp);
1267 resp.cq_handle = obj->uobject.id;
1268 resp.cqe = cq->cqe;
1269
1270 if (copy_to_user((void __user *) (unsigned long) cmd.response,
1271 &resp, sizeof resp)) {
1272 ret = -EFAULT;
1273 goto err_copy;
1274 }
1275
1276 mutex_lock(&file->mutex);
1277 list_add_tail(&obj->uobject.list, &file->ucontext->cq_list);
1278 mutex_unlock(&file->mutex);
1279
1280 obj->uobject.live = 1;
1281
1282 up_write(&obj->uobject.mutex);
1283
1284 return in_len;
1285
1286 err_copy:
1287 idr_remove_uobj(&ib_uverbs_cq_idr, &obj->uobject);
1288
1289 err_free:
1290 ib_destroy_cq(cq);
1291
1292 err_file:
1293 if (ev_file)
1294 ib_uverbs_release_ucq(file, ev_file, obj);
1295
1296 err:
1297 put_uobj_write(&obj->uobject);
1298 return ret;
1299 }
1300
1301 ssize_t ib_uverbs_resize_cq(struct ib_uverbs_file *file,
1302 const char __user *buf, int in_len,
1303 int out_len)
1304 {
1305 struct ib_uverbs_resize_cq cmd;
1306 struct ib_uverbs_resize_cq_resp resp;
1307 struct ib_udata udata;
1308 struct ib_cq *cq;
1309 int ret = -EINVAL;
1310
1311 if (copy_from_user(&cmd, buf, sizeof cmd))
1312 return -EFAULT;
1313
1314 INIT_UDATA(&udata, buf + sizeof cmd,
1315 (unsigned long) cmd.response + sizeof resp,
1316 in_len - sizeof cmd, out_len - sizeof resp);
1317
1318 cq = idr_read_cq(cmd.cq_handle, file->ucontext, 0);
1319 if (!cq)
1320 return -EINVAL;
1321
1322 ret = cq->device->resize_cq(cq, cmd.cqe, &udata);
1323 if (ret)
1324 goto out;
1325
1326 resp.cqe = cq->cqe;
1327
1328 if (copy_to_user((void __user *) (unsigned long) cmd.response,
1329 &resp, sizeof resp.cqe))
1330 ret = -EFAULT;
1331
1332 out:
1333 put_cq_read(cq);
1334
1335 return ret ? ret : in_len;
1336 }
1337
1338 static int copy_wc_to_user(void __user *dest, struct ib_wc *wc)
1339 {
1340 struct ib_uverbs_wc tmp;
1341
1342 tmp.wr_id = wc->wr_id;
1343 tmp.status = wc->status;
1344 tmp.opcode = wc->opcode;
1345 tmp.vendor_err = wc->vendor_err;
1346 tmp.byte_len = wc->byte_len;
1347 tmp.ex.imm_data = (__u32 __force) wc->ex.imm_data;
1348 tmp.qp_num = wc->qp->qp_num;
1349 tmp.src_qp = wc->src_qp;
1350 tmp.wc_flags = wc->wc_flags;
1351 tmp.pkey_index = wc->pkey_index;
1352 tmp.slid = wc->slid;
1353 tmp.sl = wc->sl;
1354 tmp.dlid_path_bits = wc->dlid_path_bits;
1355 tmp.port_num = wc->port_num;
1356 tmp.reserved = 0;
1357
1358 if (copy_to_user(dest, &tmp, sizeof tmp))
1359 return -EFAULT;
1360
1361 return 0;
1362 }
1363
1364 ssize_t ib_uverbs_poll_cq(struct ib_uverbs_file *file,
1365 const char __user *buf, int in_len,
1366 int out_len)
1367 {
1368 struct ib_uverbs_poll_cq cmd;
1369 struct ib_uverbs_poll_cq_resp resp;
1370 u8 __user *header_ptr;
1371 u8 __user *data_ptr;
1372 struct ib_cq *cq;
1373 struct ib_wc wc;
1374 int ret;
1375
1376 if (copy_from_user(&cmd, buf, sizeof cmd))
1377 return -EFAULT;
1378
1379 cq = idr_read_cq(cmd.cq_handle, file->ucontext, 0);
1380 if (!cq)
1381 return -EINVAL;
1382
1383 /* we copy a struct ib_uverbs_poll_cq_resp to user space */
1384 header_ptr = (void __user *)(unsigned long) cmd.response;
1385 data_ptr = header_ptr + sizeof resp;
1386
1387 memset(&resp, 0, sizeof resp);
1388 while (resp.count < cmd.ne) {
1389 ret = ib_poll_cq(cq, 1, &wc);
1390 if (ret < 0)
1391 goto out_put;
1392 if (!ret)
1393 break;
1394
1395 ret = copy_wc_to_user(data_ptr, &wc);
1396 if (ret)
1397 goto out_put;
1398
1399 data_ptr += sizeof(struct ib_uverbs_wc);
1400 ++resp.count;
1401 }
1402
1403 if (copy_to_user(header_ptr, &resp, sizeof resp)) {
1404 ret = -EFAULT;
1405 goto out_put;
1406 }
1407
1408 ret = in_len;
1409
1410 out_put:
1411 put_cq_read(cq);
1412 return ret;
1413 }
1414
1415 ssize_t ib_uverbs_req_notify_cq(struct ib_uverbs_file *file,
1416 const char __user *buf, int in_len,
1417 int out_len)
1418 {
1419 struct ib_uverbs_req_notify_cq cmd;
1420 struct ib_cq *cq;
1421
1422 if (copy_from_user(&cmd, buf, sizeof cmd))
1423 return -EFAULT;
1424
1425 cq = idr_read_cq(cmd.cq_handle, file->ucontext, 0);
1426 if (!cq)
1427 return -EINVAL;
1428
1429 ib_req_notify_cq(cq, cmd.solicited_only ?
1430 IB_CQ_SOLICITED : IB_CQ_NEXT_COMP);
1431
1432 put_cq_read(cq);
1433
1434 return in_len;
1435 }
1436
1437 ssize_t ib_uverbs_destroy_cq(struct ib_uverbs_file *file,
1438 const char __user *buf, int in_len,
1439 int out_len)
1440 {
1441 struct ib_uverbs_destroy_cq cmd;
1442 struct ib_uverbs_destroy_cq_resp resp;
1443 struct ib_uobject *uobj;
1444 struct ib_cq *cq;
1445 struct ib_ucq_object *obj;
1446 struct ib_uverbs_event_file *ev_file;
1447 int ret = -EINVAL;
1448
1449 if (copy_from_user(&cmd, buf, sizeof cmd))
1450 return -EFAULT;
1451
1452 uobj = idr_write_uobj(&ib_uverbs_cq_idr, cmd.cq_handle, file->ucontext);
1453 if (!uobj)
1454 return -EINVAL;
1455 cq = uobj->object;
1456 ev_file = cq->cq_context;
1457 obj = container_of(cq->uobject, struct ib_ucq_object, uobject);
1458
1459 ret = ib_destroy_cq(cq);
1460 if (!ret)
1461 uobj->live = 0;
1462
1463 put_uobj_write(uobj);
1464
1465 if (ret)
1466 return ret;
1467
1468 idr_remove_uobj(&ib_uverbs_cq_idr, uobj);
1469
1470 mutex_lock(&file->mutex);
1471 list_del(&uobj->list);
1472 mutex_unlock(&file->mutex);
1473
1474 ib_uverbs_release_ucq(file, ev_file, obj);
1475
1476 memset(&resp, 0, sizeof resp);
1477 resp.comp_events_reported = obj->comp_events_reported;
1478 resp.async_events_reported = obj->async_events_reported;
1479
1480 put_uobj(uobj);
1481
1482 if (copy_to_user((void __user *) (unsigned long) cmd.response,
1483 &resp, sizeof resp))
1484 return -EFAULT;
1485
1486 return in_len;
1487 }
1488
1489 ssize_t ib_uverbs_create_qp(struct ib_uverbs_file *file,
1490 const char __user *buf, int in_len,
1491 int out_len)
1492 {
1493 struct ib_uverbs_create_qp cmd;
1494 struct ib_uverbs_create_qp_resp resp;
1495 struct ib_udata udata;
1496 struct ib_uqp_object *obj;
1497 struct ib_device *device;
1498 struct ib_pd *pd = NULL;
1499 struct ib_xrcd *xrcd = NULL;
1500 struct ib_uobject *uninitialized_var(xrcd_uobj);
1501 struct ib_cq *scq = NULL, *rcq = NULL;
1502 struct ib_srq *srq = NULL;
1503 struct ib_qp *qp;
1504 struct ib_qp_init_attr attr;
1505 int ret;
1506
1507 if (out_len < sizeof resp)
1508 return -ENOSPC;
1509
1510 if (copy_from_user(&cmd, buf, sizeof cmd))
1511 return -EFAULT;
1512
1513 if (cmd.qp_type == IB_QPT_RAW_PACKET && !capable(CAP_NET_RAW))
1514 return -EPERM;
1515
1516 INIT_UDATA(&udata, buf + sizeof cmd,
1517 (unsigned long) cmd.response + sizeof resp,
1518 in_len - sizeof cmd, out_len - sizeof resp);
1519
1520 obj = kzalloc(sizeof *obj, GFP_KERNEL);
1521 if (!obj)
1522 return -ENOMEM;
1523
1524 init_uobj(&obj->uevent.uobject, cmd.user_handle, file->ucontext, &qp_lock_class);
1525 down_write(&obj->uevent.uobject.mutex);
1526
1527 if (cmd.qp_type == IB_QPT_XRC_TGT) {
1528 xrcd = idr_read_xrcd(cmd.pd_handle, file->ucontext, &xrcd_uobj);
1529 if (!xrcd) {
1530 ret = -EINVAL;
1531 goto err_put;
1532 }
1533 device = xrcd->device;
1534 } else {
1535 if (cmd.qp_type == IB_QPT_XRC_INI) {
1536 cmd.max_recv_wr = cmd.max_recv_sge = 0;
1537 } else {
1538 if (cmd.is_srq) {
1539 srq = idr_read_srq(cmd.srq_handle, file->ucontext);
1540 if (!srq || srq->srq_type != IB_SRQT_BASIC) {
1541 ret = -EINVAL;
1542 goto err_put;
1543 }
1544 }
1545
1546 if (cmd.recv_cq_handle != cmd.send_cq_handle) {
1547 rcq = idr_read_cq(cmd.recv_cq_handle, file->ucontext, 0);
1548 if (!rcq) {
1549 ret = -EINVAL;
1550 goto err_put;
1551 }
1552 }
1553 }
1554
1555 scq = idr_read_cq(cmd.send_cq_handle, file->ucontext, !!rcq);
1556 rcq = rcq ?: scq;
1557 pd = idr_read_pd(cmd.pd_handle, file->ucontext);
1558 if (!pd || !scq) {
1559 ret = -EINVAL;
1560 goto err_put;
1561 }
1562
1563 device = pd->device;
1564 }
1565
1566 attr.event_handler = ib_uverbs_qp_event_handler;
1567 attr.qp_context = file;
1568 attr.send_cq = scq;
1569 attr.recv_cq = rcq;
1570 attr.srq = srq;
1571 attr.xrcd = xrcd;
1572 attr.sq_sig_type = cmd.sq_sig_all ? IB_SIGNAL_ALL_WR : IB_SIGNAL_REQ_WR;
1573 attr.qp_type = cmd.qp_type;
1574 attr.create_flags = 0;
1575
1576 attr.cap.max_send_wr = cmd.max_send_wr;
1577 attr.cap.max_recv_wr = cmd.max_recv_wr;
1578 attr.cap.max_send_sge = cmd.max_send_sge;
1579 attr.cap.max_recv_sge = cmd.max_recv_sge;
1580 attr.cap.max_inline_data = cmd.max_inline_data;
1581
1582 obj->uevent.events_reported = 0;
1583 INIT_LIST_HEAD(&obj->uevent.event_list);
1584 INIT_LIST_HEAD(&obj->mcast_list);
1585
1586 if (cmd.qp_type == IB_QPT_XRC_TGT)
1587 qp = ib_create_qp(pd, &attr);
1588 else
1589 qp = device->create_qp(pd, &attr, &udata);
1590
1591 if (IS_ERR(qp)) {
1592 ret = PTR_ERR(qp);
1593 goto err_put;
1594 }
1595
1596 if (cmd.qp_type != IB_QPT_XRC_TGT) {
1597 qp->real_qp = qp;
1598 qp->device = device;
1599 qp->pd = pd;
1600 qp->send_cq = attr.send_cq;
1601 qp->recv_cq = attr.recv_cq;
1602 qp->srq = attr.srq;
1603 qp->event_handler = attr.event_handler;
1604 qp->qp_context = attr.qp_context;
1605 qp->qp_type = attr.qp_type;
1606 atomic_set(&qp->usecnt, 0);
1607 atomic_inc(&pd->usecnt);
1608 atomic_inc(&attr.send_cq->usecnt);
1609 if (attr.recv_cq)
1610 atomic_inc(&attr.recv_cq->usecnt);
1611 if (attr.srq)
1612 atomic_inc(&attr.srq->usecnt);
1613 }
1614 qp->uobject = &obj->uevent.uobject;
1615
1616 obj->uevent.uobject.object = qp;
1617 ret = idr_add_uobj(&ib_uverbs_qp_idr, &obj->uevent.uobject);
1618 if (ret)
1619 goto err_destroy;
1620
1621 memset(&resp, 0, sizeof resp);
1622 resp.qpn = qp->qp_num;
1623 resp.qp_handle = obj->uevent.uobject.id;
1624 resp.max_recv_sge = attr.cap.max_recv_sge;
1625 resp.max_send_sge = attr.cap.max_send_sge;
1626 resp.max_recv_wr = attr.cap.max_recv_wr;
1627 resp.max_send_wr = attr.cap.max_send_wr;
1628 resp.max_inline_data = attr.cap.max_inline_data;
1629
1630 if (copy_to_user((void __user *) (unsigned long) cmd.response,
1631 &resp, sizeof resp)) {
1632 ret = -EFAULT;
1633 goto err_copy;
1634 }
1635
1636 if (xrcd) {
1637 obj->uxrcd = container_of(xrcd_uobj, struct ib_uxrcd_object,
1638 uobject);
1639 atomic_inc(&obj->uxrcd->refcnt);
1640 put_xrcd_read(xrcd_uobj);
1641 }
1642
1643 if (pd)
1644 put_pd_read(pd);
1645 if (scq)
1646 put_cq_read(scq);
1647 if (rcq && rcq != scq)
1648 put_cq_read(rcq);
1649 if (srq)
1650 put_srq_read(srq);
1651
1652 mutex_lock(&file->mutex);
1653 list_add_tail(&obj->uevent.uobject.list, &file->ucontext->qp_list);
1654 mutex_unlock(&file->mutex);
1655
1656 obj->uevent.uobject.live = 1;
1657
1658 up_write(&obj->uevent.uobject.mutex);
1659
1660 return in_len;
1661
1662 err_copy:
1663 idr_remove_uobj(&ib_uverbs_qp_idr, &obj->uevent.uobject);
1664
1665 err_destroy:
1666 ib_destroy_qp(qp);
1667
1668 err_put:
1669 if (xrcd)
1670 put_xrcd_read(xrcd_uobj);
1671 if (pd)
1672 put_pd_read(pd);
1673 if (scq)
1674 put_cq_read(scq);
1675 if (rcq && rcq != scq)
1676 put_cq_read(rcq);
1677 if (srq)
1678 put_srq_read(srq);
1679
1680 put_uobj_write(&obj->uevent.uobject);
1681 return ret;
1682 }
1683
1684 ssize_t ib_uverbs_open_qp(struct ib_uverbs_file *file,
1685 const char __user *buf, int in_len, int out_len)
1686 {
1687 struct ib_uverbs_open_qp cmd;
1688 struct ib_uverbs_create_qp_resp resp;
1689 struct ib_udata udata;
1690 struct ib_uqp_object *obj;
1691 struct ib_xrcd *xrcd;
1692 struct ib_uobject *uninitialized_var(xrcd_uobj);
1693 struct ib_qp *qp;
1694 struct ib_qp_open_attr attr;
1695 int ret;
1696
1697 if (out_len < sizeof resp)
1698 return -ENOSPC;
1699
1700 if (copy_from_user(&cmd, buf, sizeof cmd))
1701 return -EFAULT;
1702
1703 INIT_UDATA(&udata, buf + sizeof cmd,
1704 (unsigned long) cmd.response + sizeof resp,
1705 in_len - sizeof cmd, out_len - sizeof resp);
1706
1707 obj = kmalloc(sizeof *obj, GFP_KERNEL);
1708 if (!obj)
1709 return -ENOMEM;
1710
1711 init_uobj(&obj->uevent.uobject, cmd.user_handle, file->ucontext, &qp_lock_class);
1712 down_write(&obj->uevent.uobject.mutex);
1713
1714 xrcd = idr_read_xrcd(cmd.pd_handle, file->ucontext, &xrcd_uobj);
1715 if (!xrcd) {
1716 ret = -EINVAL;
1717 goto err_put;
1718 }
1719
1720 attr.event_handler = ib_uverbs_qp_event_handler;
1721 attr.qp_context = file;
1722 attr.qp_num = cmd.qpn;
1723 attr.qp_type = cmd.qp_type;
1724
1725 obj->uevent.events_reported = 0;
1726 INIT_LIST_HEAD(&obj->uevent.event_list);
1727 INIT_LIST_HEAD(&obj->mcast_list);
1728
1729 qp = ib_open_qp(xrcd, &attr);
1730 if (IS_ERR(qp)) {
1731 ret = PTR_ERR(qp);
1732 goto err_put;
1733 }
1734
1735 qp->uobject = &obj->uevent.uobject;
1736
1737 obj->uevent.uobject.object = qp;
1738 ret = idr_add_uobj(&ib_uverbs_qp_idr, &obj->uevent.uobject);
1739 if (ret)
1740 goto err_destroy;
1741
1742 memset(&resp, 0, sizeof resp);
1743 resp.qpn = qp->qp_num;
1744 resp.qp_handle = obj->uevent.uobject.id;
1745
1746 if (copy_to_user((void __user *) (unsigned long) cmd.response,
1747 &resp, sizeof resp)) {
1748 ret = -EFAULT;
1749 goto err_remove;
1750 }
1751
1752 obj->uxrcd = container_of(xrcd_uobj, struct ib_uxrcd_object, uobject);
1753 atomic_inc(&obj->uxrcd->refcnt);
1754 put_xrcd_read(xrcd_uobj);
1755
1756 mutex_lock(&file->mutex);
1757 list_add_tail(&obj->uevent.uobject.list, &file->ucontext->qp_list);
1758 mutex_unlock(&file->mutex);
1759
1760 obj->uevent.uobject.live = 1;
1761
1762 up_write(&obj->uevent.uobject.mutex);
1763
1764 return in_len;
1765
1766 err_remove:
1767 idr_remove_uobj(&ib_uverbs_qp_idr, &obj->uevent.uobject);
1768
1769 err_destroy:
1770 ib_destroy_qp(qp);
1771
1772 err_put:
1773 put_xrcd_read(xrcd_uobj);
1774 put_uobj_write(&obj->uevent.uobject);
1775 return ret;
1776 }
1777
1778 ssize_t ib_uverbs_query_qp(struct ib_uverbs_file *file,
1779 const char __user *buf, int in_len,
1780 int out_len)
1781 {
1782 struct ib_uverbs_query_qp cmd;
1783 struct ib_uverbs_query_qp_resp resp;
1784 struct ib_qp *qp;
1785 struct ib_qp_attr *attr;
1786 struct ib_qp_init_attr *init_attr;
1787 int ret;
1788
1789 if (copy_from_user(&cmd, buf, sizeof cmd))
1790 return -EFAULT;
1791
1792 attr = kmalloc(sizeof *attr, GFP_KERNEL);
1793 init_attr = kmalloc(sizeof *init_attr, GFP_KERNEL);
1794 if (!attr || !init_attr) {
1795 ret = -ENOMEM;
1796 goto out;
1797 }
1798
1799 qp = idr_read_qp(cmd.qp_handle, file->ucontext);
1800 if (!qp) {
1801 ret = -EINVAL;
1802 goto out;
1803 }
1804
1805 ret = ib_query_qp(qp, attr, cmd.attr_mask, init_attr);
1806
1807 put_qp_read(qp);
1808
1809 if (ret)
1810 goto out;
1811
1812 memset(&resp, 0, sizeof resp);
1813
1814 resp.qp_state = attr->qp_state;
1815 resp.cur_qp_state = attr->cur_qp_state;
1816 resp.path_mtu = attr->path_mtu;
1817 resp.path_mig_state = attr->path_mig_state;
1818 resp.qkey = attr->qkey;
1819 resp.rq_psn = attr->rq_psn;
1820 resp.sq_psn = attr->sq_psn;
1821 resp.dest_qp_num = attr->dest_qp_num;
1822 resp.qp_access_flags = attr->qp_access_flags;
1823 resp.pkey_index = attr->pkey_index;
1824 resp.alt_pkey_index = attr->alt_pkey_index;
1825 resp.sq_draining = attr->sq_draining;
1826 resp.max_rd_atomic = attr->max_rd_atomic;
1827 resp.max_dest_rd_atomic = attr->max_dest_rd_atomic;
1828 resp.min_rnr_timer = attr->min_rnr_timer;
1829 resp.port_num = attr->port_num;
1830 resp.timeout = attr->timeout;
1831 resp.retry_cnt = attr->retry_cnt;
1832 resp.rnr_retry = attr->rnr_retry;
1833 resp.alt_port_num = attr->alt_port_num;
1834 resp.alt_timeout = attr->alt_timeout;
1835
1836 memcpy(resp.dest.dgid, attr->ah_attr.grh.dgid.raw, 16);
1837 resp.dest.flow_label = attr->ah_attr.grh.flow_label;
1838 resp.dest.sgid_index = attr->ah_attr.grh.sgid_index;
1839 resp.dest.hop_limit = attr->ah_attr.grh.hop_limit;
1840 resp.dest.traffic_class = attr->ah_attr.grh.traffic_class;
1841 resp.dest.dlid = attr->ah_attr.dlid;
1842 resp.dest.sl = attr->ah_attr.sl;
1843 resp.dest.src_path_bits = attr->ah_attr.src_path_bits;
1844 resp.dest.static_rate = attr->ah_attr.static_rate;
1845 resp.dest.is_global = !!(attr->ah_attr.ah_flags & IB_AH_GRH);
1846 resp.dest.port_num = attr->ah_attr.port_num;
1847
1848 memcpy(resp.alt_dest.dgid, attr->alt_ah_attr.grh.dgid.raw, 16);
1849 resp.alt_dest.flow_label = attr->alt_ah_attr.grh.flow_label;
1850 resp.alt_dest.sgid_index = attr->alt_ah_attr.grh.sgid_index;
1851 resp.alt_dest.hop_limit = attr->alt_ah_attr.grh.hop_limit;
1852 resp.alt_dest.traffic_class = attr->alt_ah_attr.grh.traffic_class;
1853 resp.alt_dest.dlid = attr->alt_ah_attr.dlid;
1854 resp.alt_dest.sl = attr->alt_ah_attr.sl;
1855 resp.alt_dest.src_path_bits = attr->alt_ah_attr.src_path_bits;
1856 resp.alt_dest.static_rate = attr->alt_ah_attr.static_rate;
1857 resp.alt_dest.is_global = !!(attr->alt_ah_attr.ah_flags & IB_AH_GRH);
1858 resp.alt_dest.port_num = attr->alt_ah_attr.port_num;
1859
1860 resp.max_send_wr = init_attr->cap.max_send_wr;
1861 resp.max_recv_wr = init_attr->cap.max_recv_wr;
1862 resp.max_send_sge = init_attr->cap.max_send_sge;
1863 resp.max_recv_sge = init_attr->cap.max_recv_sge;
1864 resp.max_inline_data = init_attr->cap.max_inline_data;
1865 resp.sq_sig_all = init_attr->sq_sig_type == IB_SIGNAL_ALL_WR;
1866
1867 if (copy_to_user((void __user *) (unsigned long) cmd.response,
1868 &resp, sizeof resp))
1869 ret = -EFAULT;
1870
1871 out:
1872 kfree(attr);
1873 kfree(init_attr);
1874
1875 return ret ? ret : in_len;
1876 }
1877
1878 /* Remove ignored fields set in the attribute mask */
1879 static int modify_qp_mask(enum ib_qp_type qp_type, int mask)
1880 {
1881 switch (qp_type) {
1882 case IB_QPT_XRC_INI:
1883 return mask & ~(IB_QP_MAX_DEST_RD_ATOMIC | IB_QP_MIN_RNR_TIMER);
1884 case IB_QPT_XRC_TGT:
1885 return mask & ~(IB_QP_MAX_QP_RD_ATOMIC | IB_QP_RETRY_CNT |
1886 IB_QP_RNR_RETRY);
1887 default:
1888 return mask;
1889 }
1890 }
1891
1892 ssize_t ib_uverbs_modify_qp(struct ib_uverbs_file *file,
1893 const char __user *buf, int in_len,
1894 int out_len)
1895 {
1896 struct ib_uverbs_modify_qp cmd;
1897 struct ib_udata udata;
1898 struct ib_qp *qp;
1899 struct ib_qp_attr *attr;
1900 int ret;
1901
1902 if (copy_from_user(&cmd, buf, sizeof cmd))
1903 return -EFAULT;
1904
1905 INIT_UDATA(&udata, buf + sizeof cmd, NULL, in_len - sizeof cmd,
1906 out_len);
1907
1908 attr = kmalloc(sizeof *attr, GFP_KERNEL);
1909 if (!attr)
1910 return -ENOMEM;
1911
1912 qp = idr_read_qp(cmd.qp_handle, file->ucontext);
1913 if (!qp) {
1914 ret = -EINVAL;
1915 goto out;
1916 }
1917
1918 attr->qp_state = cmd.qp_state;
1919 attr->cur_qp_state = cmd.cur_qp_state;
1920 attr->path_mtu = cmd.path_mtu;
1921 attr->path_mig_state = cmd.path_mig_state;
1922 attr->qkey = cmd.qkey;
1923 attr->rq_psn = cmd.rq_psn;
1924 attr->sq_psn = cmd.sq_psn;
1925 attr->dest_qp_num = cmd.dest_qp_num;
1926 attr->qp_access_flags = cmd.qp_access_flags;
1927 attr->pkey_index = cmd.pkey_index;
1928 attr->alt_pkey_index = cmd.alt_pkey_index;
1929 attr->en_sqd_async_notify = cmd.en_sqd_async_notify;
1930 attr->max_rd_atomic = cmd.max_rd_atomic;
1931 attr->max_dest_rd_atomic = cmd.max_dest_rd_atomic;
1932 attr->min_rnr_timer = cmd.min_rnr_timer;
1933 attr->port_num = cmd.port_num;
1934 attr->timeout = cmd.timeout;
1935 attr->retry_cnt = cmd.retry_cnt;
1936 attr->rnr_retry = cmd.rnr_retry;
1937 attr->alt_port_num = cmd.alt_port_num;
1938 attr->alt_timeout = cmd.alt_timeout;
1939
1940 memcpy(attr->ah_attr.grh.dgid.raw, cmd.dest.dgid, 16);
1941 attr->ah_attr.grh.flow_label = cmd.dest.flow_label;
1942 attr->ah_attr.grh.sgid_index = cmd.dest.sgid_index;
1943 attr->ah_attr.grh.hop_limit = cmd.dest.hop_limit;
1944 attr->ah_attr.grh.traffic_class = cmd.dest.traffic_class;
1945 attr->ah_attr.dlid = cmd.dest.dlid;
1946 attr->ah_attr.sl = cmd.dest.sl;
1947 attr->ah_attr.src_path_bits = cmd.dest.src_path_bits;
1948 attr->ah_attr.static_rate = cmd.dest.static_rate;
1949 attr->ah_attr.ah_flags = cmd.dest.is_global ? IB_AH_GRH : 0;
1950 attr->ah_attr.port_num = cmd.dest.port_num;
1951
1952 memcpy(attr->alt_ah_attr.grh.dgid.raw, cmd.alt_dest.dgid, 16);
1953 attr->alt_ah_attr.grh.flow_label = cmd.alt_dest.flow_label;
1954 attr->alt_ah_attr.grh.sgid_index = cmd.alt_dest.sgid_index;
1955 attr->alt_ah_attr.grh.hop_limit = cmd.alt_dest.hop_limit;
1956 attr->alt_ah_attr.grh.traffic_class = cmd.alt_dest.traffic_class;
1957 attr->alt_ah_attr.dlid = cmd.alt_dest.dlid;
1958 attr->alt_ah_attr.sl = cmd.alt_dest.sl;
1959 attr->alt_ah_attr.src_path_bits = cmd.alt_dest.src_path_bits;
1960 attr->alt_ah_attr.static_rate = cmd.alt_dest.static_rate;
1961 attr->alt_ah_attr.ah_flags = cmd.alt_dest.is_global ? IB_AH_GRH : 0;
1962 attr->alt_ah_attr.port_num = cmd.alt_dest.port_num;
1963
1964 if (qp->real_qp == qp) {
1965 ret = ib_resolve_eth_l2_attrs(qp, attr, &cmd.attr_mask);
1966 if (ret)
1967 goto out;
1968 ret = qp->device->modify_qp(qp, attr,
1969 modify_qp_mask(qp->qp_type, cmd.attr_mask), &udata);
1970 } else {
1971 ret = ib_modify_qp(qp, attr, modify_qp_mask(qp->qp_type, cmd.attr_mask));
1972 }
1973
1974 put_qp_read(qp);
1975
1976 if (ret)
1977 goto out;
1978
1979 ret = in_len;
1980
1981 out:
1982 kfree(attr);
1983
1984 return ret;
1985 }
1986
1987 ssize_t ib_uverbs_destroy_qp(struct ib_uverbs_file *file,
1988 const char __user *buf, int in_len,
1989 int out_len)
1990 {
1991 struct ib_uverbs_destroy_qp cmd;
1992 struct ib_uverbs_destroy_qp_resp resp;
1993 struct ib_uobject *uobj;
1994 struct ib_qp *qp;
1995 struct ib_uqp_object *obj;
1996 int ret = -EINVAL;
1997
1998 if (copy_from_user(&cmd, buf, sizeof cmd))
1999 return -EFAULT;
2000
2001 memset(&resp, 0, sizeof resp);
2002
2003 uobj = idr_write_uobj(&ib_uverbs_qp_idr, cmd.qp_handle, file->ucontext);
2004 if (!uobj)
2005 return -EINVAL;
2006 qp = uobj->object;
2007 obj = container_of(uobj, struct ib_uqp_object, uevent.uobject);
2008
2009 if (!list_empty(&obj->mcast_list)) {
2010 put_uobj_write(uobj);
2011 return -EBUSY;
2012 }
2013
2014 ret = ib_destroy_qp(qp);
2015 if (!ret)
2016 uobj->live = 0;
2017
2018 put_uobj_write(uobj);
2019
2020 if (ret)
2021 return ret;
2022
2023 if (obj->uxrcd)
2024 atomic_dec(&obj->uxrcd->refcnt);
2025
2026 idr_remove_uobj(&ib_uverbs_qp_idr, uobj);
2027
2028 mutex_lock(&file->mutex);
2029 list_del(&uobj->list);
2030 mutex_unlock(&file->mutex);
2031
2032 ib_uverbs_release_uevent(file, &obj->uevent);
2033
2034 resp.events_reported = obj->uevent.events_reported;
2035
2036 put_uobj(uobj);
2037
2038 if (copy_to_user((void __user *) (unsigned long) cmd.response,
2039 &resp, sizeof resp))
2040 return -EFAULT;
2041
2042 return in_len;
2043 }
2044
2045 ssize_t ib_uverbs_post_send(struct ib_uverbs_file *file,
2046 const char __user *buf, int in_len,
2047 int out_len)
2048 {
2049 struct ib_uverbs_post_send cmd;
2050 struct ib_uverbs_post_send_resp resp;
2051 struct ib_uverbs_send_wr *user_wr;
2052 struct ib_send_wr *wr = NULL, *last, *next, *bad_wr;
2053 struct ib_qp *qp;
2054 int i, sg_ind;
2055 int is_ud;
2056 ssize_t ret = -EINVAL;
2057
2058 if (copy_from_user(&cmd, buf, sizeof cmd))
2059 return -EFAULT;
2060
2061 if (in_len < sizeof cmd + cmd.wqe_size * cmd.wr_count +
2062 cmd.sge_count * sizeof (struct ib_uverbs_sge))
2063 return -EINVAL;
2064
2065 if (cmd.wqe_size < sizeof (struct ib_uverbs_send_wr))
2066 return -EINVAL;
2067
2068 user_wr = kmalloc(cmd.wqe_size, GFP_KERNEL);
2069 if (!user_wr)
2070 return -ENOMEM;
2071
2072 qp = idr_read_qp(cmd.qp_handle, file->ucontext);
2073 if (!qp)
2074 goto out;
2075
2076 is_ud = qp->qp_type == IB_QPT_UD;
2077 sg_ind = 0;
2078 last = NULL;
2079 for (i = 0; i < cmd.wr_count; ++i) {
2080 if (copy_from_user(user_wr,
2081 buf + sizeof cmd + i * cmd.wqe_size,
2082 cmd.wqe_size)) {
2083 ret = -EFAULT;
2084 goto out_put;
2085 }
2086
2087 if (user_wr->num_sge + sg_ind > cmd.sge_count) {
2088 ret = -EINVAL;
2089 goto out_put;
2090 }
2091
2092 next = kmalloc(ALIGN(sizeof *next, sizeof (struct ib_sge)) +
2093 user_wr->num_sge * sizeof (struct ib_sge),
2094 GFP_KERNEL);
2095 if (!next) {
2096 ret = -ENOMEM;
2097 goto out_put;
2098 }
2099
2100 if (!last)
2101 wr = next;
2102 else
2103 last->next = next;
2104 last = next;
2105
2106 next->next = NULL;
2107 next->wr_id = user_wr->wr_id;
2108 next->num_sge = user_wr->num_sge;
2109 next->opcode = user_wr->opcode;
2110 next->send_flags = user_wr->send_flags;
2111
2112 if (is_ud) {
2113 next->wr.ud.ah = idr_read_ah(user_wr->wr.ud.ah,
2114 file->ucontext);
2115 if (!next->wr.ud.ah) {
2116 ret = -EINVAL;
2117 goto out_put;
2118 }
2119 next->wr.ud.remote_qpn = user_wr->wr.ud.remote_qpn;
2120 next->wr.ud.remote_qkey = user_wr->wr.ud.remote_qkey;
2121 if (next->opcode == IB_WR_SEND_WITH_IMM)
2122 next->ex.imm_data =
2123 (__be32 __force) user_wr->ex.imm_data;
2124 } else {
2125 switch (next->opcode) {
2126 case IB_WR_RDMA_WRITE_WITH_IMM:
2127 next->ex.imm_data =
2128 (__be32 __force) user_wr->ex.imm_data;
2129 case IB_WR_RDMA_WRITE:
2130 case IB_WR_RDMA_READ:
2131 next->wr.rdma.remote_addr =
2132 user_wr->wr.rdma.remote_addr;
2133 next->wr.rdma.rkey =
2134 user_wr->wr.rdma.rkey;
2135 break;
2136 case IB_WR_SEND_WITH_IMM:
2137 next->ex.imm_data =
2138 (__be32 __force) user_wr->ex.imm_data;
2139 break;
2140 case IB_WR_SEND_WITH_INV:
2141 next->ex.invalidate_rkey =
2142 user_wr->ex.invalidate_rkey;
2143 break;
2144 case IB_WR_ATOMIC_CMP_AND_SWP:
2145 case IB_WR_ATOMIC_FETCH_AND_ADD:
2146 next->wr.atomic.remote_addr =
2147 user_wr->wr.atomic.remote_addr;
2148 next->wr.atomic.compare_add =
2149 user_wr->wr.atomic.compare_add;
2150 next->wr.atomic.swap = user_wr->wr.atomic.swap;
2151 next->wr.atomic.rkey = user_wr->wr.atomic.rkey;
2152 break;
2153 default:
2154 break;
2155 }
2156 }
2157
2158 if (next->num_sge) {
2159 next->sg_list = (void *) next +
2160 ALIGN(sizeof *next, sizeof (struct ib_sge));
2161 if (copy_from_user(next->sg_list,
2162 buf + sizeof cmd +
2163 cmd.wr_count * cmd.wqe_size +
2164 sg_ind * sizeof (struct ib_sge),
2165 next->num_sge * sizeof (struct ib_sge))) {
2166 ret = -EFAULT;
2167 goto out_put;
2168 }
2169 sg_ind += next->num_sge;
2170 } else
2171 next->sg_list = NULL;
2172 }
2173
2174 resp.bad_wr = 0;
2175 ret = qp->device->post_send(qp->real_qp, wr, &bad_wr);
2176 if (ret)
2177 for (next = wr; next; next = next->next) {
2178 ++resp.bad_wr;
2179 if (next == bad_wr)
2180 break;
2181 }
2182
2183 if (copy_to_user((void __user *) (unsigned long) cmd.response,
2184 &resp, sizeof resp))
2185 ret = -EFAULT;
2186
2187 out_put:
2188 put_qp_read(qp);
2189
2190 while (wr) {
2191 if (is_ud && wr->wr.ud.ah)
2192 put_ah_read(wr->wr.ud.ah);
2193 next = wr->next;
2194 kfree(wr);
2195 wr = next;
2196 }
2197
2198 out:
2199 kfree(user_wr);
2200
2201 return ret ? ret : in_len;
2202 }
2203
2204 static struct ib_recv_wr *ib_uverbs_unmarshall_recv(const char __user *buf,
2205 int in_len,
2206 u32 wr_count,
2207 u32 sge_count,
2208 u32 wqe_size)
2209 {
2210 struct ib_uverbs_recv_wr *user_wr;
2211 struct ib_recv_wr *wr = NULL, *last, *next;
2212 int sg_ind;
2213 int i;
2214 int ret;
2215
2216 if (in_len < wqe_size * wr_count +
2217 sge_count * sizeof (struct ib_uverbs_sge))
2218 return ERR_PTR(-EINVAL);
2219
2220 if (wqe_size < sizeof (struct ib_uverbs_recv_wr))
2221 return ERR_PTR(-EINVAL);
2222
2223 user_wr = kmalloc(wqe_size, GFP_KERNEL);
2224 if (!user_wr)
2225 return ERR_PTR(-ENOMEM);
2226
2227 sg_ind = 0;
2228 last = NULL;
2229 for (i = 0; i < wr_count; ++i) {
2230 if (copy_from_user(user_wr, buf + i * wqe_size,
2231 wqe_size)) {
2232 ret = -EFAULT;
2233 goto err;
2234 }
2235
2236 if (user_wr->num_sge + sg_ind > sge_count) {
2237 ret = -EINVAL;
2238 goto err;
2239 }
2240
2241 next = kmalloc(ALIGN(sizeof *next, sizeof (struct ib_sge)) +
2242 user_wr->num_sge * sizeof (struct ib_sge),
2243 GFP_KERNEL);
2244 if (!next) {
2245 ret = -ENOMEM;
2246 goto err;
2247 }
2248
2249 if (!last)
2250 wr = next;
2251 else
2252 last->next = next;
2253 last = next;
2254
2255 next->next = NULL;
2256 next->wr_id = user_wr->wr_id;
2257 next->num_sge = user_wr->num_sge;
2258
2259 if (next->num_sge) {
2260 next->sg_list = (void *) next +
2261 ALIGN(sizeof *next, sizeof (struct ib_sge));
2262 if (copy_from_user(next->sg_list,
2263 buf + wr_count * wqe_size +
2264 sg_ind * sizeof (struct ib_sge),
2265 next->num_sge * sizeof (struct ib_sge))) {
2266 ret = -EFAULT;
2267 goto err;
2268 }
2269 sg_ind += next->num_sge;
2270 } else
2271 next->sg_list = NULL;
2272 }
2273
2274 kfree(user_wr);
2275 return wr;
2276
2277 err:
2278 kfree(user_wr);
2279
2280 while (wr) {
2281 next = wr->next;
2282 kfree(wr);
2283 wr = next;
2284 }
2285
2286 return ERR_PTR(ret);
2287 }
2288
2289 ssize_t ib_uverbs_post_recv(struct ib_uverbs_file *file,
2290 const char __user *buf, int in_len,
2291 int out_len)
2292 {
2293 struct ib_uverbs_post_recv cmd;
2294 struct ib_uverbs_post_recv_resp resp;
2295 struct ib_recv_wr *wr, *next, *bad_wr;
2296 struct ib_qp *qp;
2297 ssize_t ret = -EINVAL;
2298
2299 if (copy_from_user(&cmd, buf, sizeof cmd))
2300 return -EFAULT;
2301
2302 wr = ib_uverbs_unmarshall_recv(buf + sizeof cmd,
2303 in_len - sizeof cmd, cmd.wr_count,
2304 cmd.sge_count, cmd.wqe_size);
2305 if (IS_ERR(wr))
2306 return PTR_ERR(wr);
2307
2308 qp = idr_read_qp(cmd.qp_handle, file->ucontext);
2309 if (!qp)
2310 goto out;
2311
2312 resp.bad_wr = 0;
2313 ret = qp->device->post_recv(qp->real_qp, wr, &bad_wr);
2314
2315 put_qp_read(qp);
2316
2317 if (ret)
2318 for (next = wr; next; next = next->next) {
2319 ++resp.bad_wr;
2320 if (next == bad_wr)
2321 break;
2322 }
2323
2324 if (copy_to_user((void __user *) (unsigned long) cmd.response,
2325 &resp, sizeof resp))
2326 ret = -EFAULT;
2327
2328 out:
2329 while (wr) {
2330 next = wr->next;
2331 kfree(wr);
2332 wr = next;
2333 }
2334
2335 return ret ? ret : in_len;
2336 }
2337
2338 ssize_t ib_uverbs_post_srq_recv(struct ib_uverbs_file *file,
2339 const char __user *buf, int in_len,
2340 int out_len)
2341 {
2342 struct ib_uverbs_post_srq_recv cmd;
2343 struct ib_uverbs_post_srq_recv_resp resp;
2344 struct ib_recv_wr *wr, *next, *bad_wr;
2345 struct ib_srq *srq;
2346 ssize_t ret = -EINVAL;
2347
2348 if (copy_from_user(&cmd, buf, sizeof cmd))
2349 return -EFAULT;
2350
2351 wr = ib_uverbs_unmarshall_recv(buf + sizeof cmd,
2352 in_len - sizeof cmd, cmd.wr_count,
2353 cmd.sge_count, cmd.wqe_size);
2354 if (IS_ERR(wr))
2355 return PTR_ERR(wr);
2356
2357 srq = idr_read_srq(cmd.srq_handle, file->ucontext);
2358 if (!srq)
2359 goto out;
2360
2361 resp.bad_wr = 0;
2362 ret = srq->device->post_srq_recv(srq, wr, &bad_wr);
2363
2364 put_srq_read(srq);
2365
2366 if (ret)
2367 for (next = wr; next; next = next->next) {
2368 ++resp.bad_wr;
2369 if (next == bad_wr)
2370 break;
2371 }
2372
2373 if (copy_to_user((void __user *) (unsigned long) cmd.response,
2374 &resp, sizeof resp))
2375 ret = -EFAULT;
2376
2377 out:
2378 while (wr) {
2379 next = wr->next;
2380 kfree(wr);
2381 wr = next;
2382 }
2383
2384 return ret ? ret : in_len;
2385 }
2386
2387 ssize_t ib_uverbs_create_ah(struct ib_uverbs_file *file,
2388 const char __user *buf, int in_len,
2389 int out_len)
2390 {
2391 struct ib_uverbs_create_ah cmd;
2392 struct ib_uverbs_create_ah_resp resp;
2393 struct ib_uobject *uobj;
2394 struct ib_pd *pd;
2395 struct ib_ah *ah;
2396 struct ib_ah_attr attr;
2397 int ret;
2398
2399 if (out_len < sizeof resp)
2400 return -ENOSPC;
2401
2402 if (copy_from_user(&cmd, buf, sizeof cmd))
2403 return -EFAULT;
2404
2405 uobj = kmalloc(sizeof *uobj, GFP_KERNEL);
2406 if (!uobj)
2407 return -ENOMEM;
2408
2409 init_uobj(uobj, cmd.user_handle, file->ucontext, &ah_lock_class);
2410 down_write(&uobj->mutex);
2411
2412 pd = idr_read_pd(cmd.pd_handle, file->ucontext);
2413 if (!pd) {
2414 ret = -EINVAL;
2415 goto err;
2416 }
2417
2418 attr.dlid = cmd.attr.dlid;
2419 attr.sl = cmd.attr.sl;
2420 attr.src_path_bits = cmd.attr.src_path_bits;
2421 attr.static_rate = cmd.attr.static_rate;
2422 attr.ah_flags = cmd.attr.is_global ? IB_AH_GRH : 0;
2423 attr.port_num = cmd.attr.port_num;
2424 attr.grh.flow_label = cmd.attr.grh.flow_label;
2425 attr.grh.sgid_index = cmd.attr.grh.sgid_index;
2426 attr.grh.hop_limit = cmd.attr.grh.hop_limit;
2427 attr.grh.traffic_class = cmd.attr.grh.traffic_class;
2428 memcpy(attr.grh.dgid.raw, cmd.attr.grh.dgid, 16);
2429
2430 ah = ib_create_ah(pd, &attr);
2431 if (IS_ERR(ah)) {
2432 ret = PTR_ERR(ah);
2433 goto err_put;
2434 }
2435
2436 ah->uobject = uobj;
2437 uobj->object = ah;
2438
2439 ret = idr_add_uobj(&ib_uverbs_ah_idr, uobj);
2440 if (ret)
2441 goto err_destroy;
2442
2443 resp.ah_handle = uobj->id;
2444
2445 if (copy_to_user((void __user *) (unsigned long) cmd.response,
2446 &resp, sizeof resp)) {
2447 ret = -EFAULT;
2448 goto err_copy;
2449 }
2450
2451 put_pd_read(pd);
2452
2453 mutex_lock(&file->mutex);
2454 list_add_tail(&uobj->list, &file->ucontext->ah_list);
2455 mutex_unlock(&file->mutex);
2456
2457 uobj->live = 1;
2458
2459 up_write(&uobj->mutex);
2460
2461 return in_len;
2462
2463 err_copy:
2464 idr_remove_uobj(&ib_uverbs_ah_idr, uobj);
2465
2466 err_destroy:
2467 ib_destroy_ah(ah);
2468
2469 err_put:
2470 put_pd_read(pd);
2471
2472 err:
2473 put_uobj_write(uobj);
2474 return ret;
2475 }
2476
2477 ssize_t ib_uverbs_destroy_ah(struct ib_uverbs_file *file,
2478 const char __user *buf, int in_len, int out_len)
2479 {
2480 struct ib_uverbs_destroy_ah cmd;
2481 struct ib_ah *ah;
2482 struct ib_uobject *uobj;
2483 int ret;
2484
2485 if (copy_from_user(&cmd, buf, sizeof cmd))
2486 return -EFAULT;
2487
2488 uobj = idr_write_uobj(&ib_uverbs_ah_idr, cmd.ah_handle, file->ucontext);
2489 if (!uobj)
2490 return -EINVAL;
2491 ah = uobj->object;
2492
2493 ret = ib_destroy_ah(ah);
2494 if (!ret)
2495 uobj->live = 0;
2496
2497 put_uobj_write(uobj);
2498
2499 if (ret)
2500 return ret;
2501
2502 idr_remove_uobj(&ib_uverbs_ah_idr, uobj);
2503
2504 mutex_lock(&file->mutex);
2505 list_del(&uobj->list);
2506 mutex_unlock(&file->mutex);
2507
2508 put_uobj(uobj);
2509
2510 return in_len;
2511 }
2512
2513 ssize_t ib_uverbs_attach_mcast(struct ib_uverbs_file *file,
2514 const char __user *buf, int in_len,
2515 int out_len)
2516 {
2517 struct ib_uverbs_attach_mcast cmd;
2518 struct ib_qp *qp;
2519 struct ib_uqp_object *obj;
2520 struct ib_uverbs_mcast_entry *mcast;
2521 int ret;
2522
2523 if (copy_from_user(&cmd, buf, sizeof cmd))
2524 return -EFAULT;
2525
2526 qp = idr_write_qp(cmd.qp_handle, file->ucontext);
2527 if (!qp)
2528 return -EINVAL;
2529
2530 obj = container_of(qp->uobject, struct ib_uqp_object, uevent.uobject);
2531
2532 list_for_each_entry(mcast, &obj->mcast_list, list)
2533 if (cmd.mlid == mcast->lid &&
2534 !memcmp(cmd.gid, mcast->gid.raw, sizeof mcast->gid.raw)) {
2535 ret = 0;
2536 goto out_put;
2537 }
2538
2539 mcast = kmalloc(sizeof *mcast, GFP_KERNEL);
2540 if (!mcast) {
2541 ret = -ENOMEM;
2542 goto out_put;
2543 }
2544
2545 mcast->lid = cmd.mlid;
2546 memcpy(mcast->gid.raw, cmd.gid, sizeof mcast->gid.raw);
2547
2548 ret = ib_attach_mcast(qp, &mcast->gid, cmd.mlid);
2549 if (!ret)
2550 list_add_tail(&mcast->list, &obj->mcast_list);
2551 else
2552 kfree(mcast);
2553
2554 out_put:
2555 put_qp_write(qp);
2556
2557 return ret ? ret : in_len;
2558 }
2559
2560 ssize_t ib_uverbs_detach_mcast(struct ib_uverbs_file *file,
2561 const char __user *buf, int in_len,
2562 int out_len)
2563 {
2564 struct ib_uverbs_detach_mcast cmd;
2565 struct ib_uqp_object *obj;
2566 struct ib_qp *qp;
2567 struct ib_uverbs_mcast_entry *mcast;
2568 int ret = -EINVAL;
2569
2570 if (copy_from_user(&cmd, buf, sizeof cmd))
2571 return -EFAULT;
2572
2573 qp = idr_write_qp(cmd.qp_handle, file->ucontext);
2574 if (!qp)
2575 return -EINVAL;
2576
2577 ret = ib_detach_mcast(qp, (union ib_gid *) cmd.gid, cmd.mlid);
2578 if (ret)
2579 goto out_put;
2580
2581 obj = container_of(qp->uobject, struct ib_uqp_object, uevent.uobject);
2582
2583 list_for_each_entry(mcast, &obj->mcast_list, list)
2584 if (cmd.mlid == mcast->lid &&
2585 !memcmp(cmd.gid, mcast->gid.raw, sizeof mcast->gid.raw)) {
2586 list_del(&mcast->list);
2587 kfree(mcast);
2588 break;
2589 }
2590
2591 out_put:
2592 put_qp_write(qp);
2593
2594 return ret ? ret : in_len;
2595 }
2596
2597 static int kern_spec_to_ib_spec(struct ib_uverbs_flow_spec *kern_spec,
2598 union ib_flow_spec *ib_spec)
2599 {
2600 if (kern_spec->reserved)
2601 return -EINVAL;
2602
2603 ib_spec->type = kern_spec->type;
2604
2605 switch (ib_spec->type) {
2606 case IB_FLOW_SPEC_ETH:
2607 ib_spec->eth.size = sizeof(struct ib_flow_spec_eth);
2608 if (ib_spec->eth.size != kern_spec->eth.size)
2609 return -EINVAL;
2610 memcpy(&ib_spec->eth.val, &kern_spec->eth.val,
2611 sizeof(struct ib_flow_eth_filter));
2612 memcpy(&ib_spec->eth.mask, &kern_spec->eth.mask,
2613 sizeof(struct ib_flow_eth_filter));
2614 break;
2615 case IB_FLOW_SPEC_IPV4:
2616 ib_spec->ipv4.size = sizeof(struct ib_flow_spec_ipv4);
2617 if (ib_spec->ipv4.size != kern_spec->ipv4.size)
2618 return -EINVAL;
2619 memcpy(&ib_spec->ipv4.val, &kern_spec->ipv4.val,
2620 sizeof(struct ib_flow_ipv4_filter));
2621 memcpy(&ib_spec->ipv4.mask, &kern_spec->ipv4.mask,
2622 sizeof(struct ib_flow_ipv4_filter));
2623 break;
2624 case IB_FLOW_SPEC_TCP:
2625 case IB_FLOW_SPEC_UDP:
2626 ib_spec->tcp_udp.size = sizeof(struct ib_flow_spec_tcp_udp);
2627 if (ib_spec->tcp_udp.size != kern_spec->tcp_udp.size)
2628 return -EINVAL;
2629 memcpy(&ib_spec->tcp_udp.val, &kern_spec->tcp_udp.val,
2630 sizeof(struct ib_flow_tcp_udp_filter));
2631 memcpy(&ib_spec->tcp_udp.mask, &kern_spec->tcp_udp.mask,
2632 sizeof(struct ib_flow_tcp_udp_filter));
2633 break;
2634 default:
2635 return -EINVAL;
2636 }
2637 return 0;
2638 }
2639
2640 int ib_uverbs_ex_create_flow(struct ib_uverbs_file *file,
2641 struct ib_udata *ucore,
2642 struct ib_udata *uhw)
2643 {
2644 struct ib_uverbs_create_flow cmd;
2645 struct ib_uverbs_create_flow_resp resp;
2646 struct ib_uobject *uobj;
2647 struct ib_flow *flow_id;
2648 struct ib_uverbs_flow_attr *kern_flow_attr;
2649 struct ib_flow_attr *flow_attr;
2650 struct ib_qp *qp;
2651 int err = 0;
2652 void *kern_spec;
2653 void *ib_spec;
2654 int i;
2655
2656 if (ucore->inlen < sizeof(cmd))
2657 return -EINVAL;
2658
2659 if (ucore->outlen < sizeof(resp))
2660 return -ENOSPC;
2661
2662 err = ib_copy_from_udata(&cmd, ucore, sizeof(cmd));
2663 if (err)
2664 return err;
2665
2666 ucore->inbuf += sizeof(cmd);
2667 ucore->inlen -= sizeof(cmd);
2668
2669 if (cmd.comp_mask)
2670 return -EINVAL;
2671
2672 if ((cmd.flow_attr.type == IB_FLOW_ATTR_SNIFFER &&
2673 !capable(CAP_NET_ADMIN)) || !capable(CAP_NET_RAW))
2674 return -EPERM;
2675
2676 if (cmd.flow_attr.num_of_specs > IB_FLOW_SPEC_SUPPORT_LAYERS)
2677 return -EINVAL;
2678
2679 if (cmd.flow_attr.size > ucore->inlen ||
2680 cmd.flow_attr.size >
2681 (cmd.flow_attr.num_of_specs * sizeof(struct ib_uverbs_flow_spec)))
2682 return -EINVAL;
2683
2684 if (cmd.flow_attr.reserved[0] ||
2685 cmd.flow_attr.reserved[1])
2686 return -EINVAL;
2687
2688 if (cmd.flow_attr.num_of_specs) {
2689 kern_flow_attr = kmalloc(sizeof(*kern_flow_attr) + cmd.flow_attr.size,
2690 GFP_KERNEL);
2691 if (!kern_flow_attr)
2692 return -ENOMEM;
2693
2694 memcpy(kern_flow_attr, &cmd.flow_attr, sizeof(*kern_flow_attr));
2695 err = ib_copy_from_udata(kern_flow_attr + 1, ucore,
2696 cmd.flow_attr.size);
2697 if (err)
2698 goto err_free_attr;
2699 } else {
2700 kern_flow_attr = &cmd.flow_attr;
2701 }
2702
2703 uobj = kmalloc(sizeof(*uobj), GFP_KERNEL);
2704 if (!uobj) {
2705 err = -ENOMEM;
2706 goto err_free_attr;
2707 }
2708 init_uobj(uobj, 0, file->ucontext, &rule_lock_class);
2709 down_write(&uobj->mutex);
2710
2711 qp = idr_read_qp(cmd.qp_handle, file->ucontext);
2712 if (!qp) {
2713 err = -EINVAL;
2714 goto err_uobj;
2715 }
2716
2717 flow_attr = kmalloc(sizeof(*flow_attr) + cmd.flow_attr.size, GFP_KERNEL);
2718 if (!flow_attr) {
2719 err = -ENOMEM;
2720 goto err_put;
2721 }
2722
2723 flow_attr->type = kern_flow_attr->type;
2724 flow_attr->priority = kern_flow_attr->priority;
2725 flow_attr->num_of_specs = kern_flow_attr->num_of_specs;
2726 flow_attr->port = kern_flow_attr->port;
2727 flow_attr->flags = kern_flow_attr->flags;
2728 flow_attr->size = sizeof(*flow_attr);
2729
2730 kern_spec = kern_flow_attr + 1;
2731 ib_spec = flow_attr + 1;
2732 for (i = 0; i < flow_attr->num_of_specs &&
2733 cmd.flow_attr.size > offsetof(struct ib_uverbs_flow_spec, reserved) &&
2734 cmd.flow_attr.size >=
2735 ((struct ib_uverbs_flow_spec *)kern_spec)->size; i++) {
2736 err = kern_spec_to_ib_spec(kern_spec, ib_spec);
2737 if (err)
2738 goto err_free;
2739 flow_attr->size +=
2740 ((union ib_flow_spec *) ib_spec)->size;
2741 cmd.flow_attr.size -= ((struct ib_uverbs_flow_spec *)kern_spec)->size;
2742 kern_spec += ((struct ib_uverbs_flow_spec *) kern_spec)->size;
2743 ib_spec += ((union ib_flow_spec *) ib_spec)->size;
2744 }
2745 if (cmd.flow_attr.size || (i != flow_attr->num_of_specs)) {
2746 pr_warn("create flow failed, flow %d: %d bytes left from uverb cmd\n",
2747 i, cmd.flow_attr.size);
2748 err = -EINVAL;
2749 goto err_free;
2750 }
2751 flow_id = ib_create_flow(qp, flow_attr, IB_FLOW_DOMAIN_USER);
2752 if (IS_ERR(flow_id)) {
2753 err = PTR_ERR(flow_id);
2754 goto err_free;
2755 }
2756 flow_id->qp = qp;
2757 flow_id->uobject = uobj;
2758 uobj->object = flow_id;
2759
2760 err = idr_add_uobj(&ib_uverbs_rule_idr, uobj);
2761 if (err)
2762 goto destroy_flow;
2763
2764 memset(&resp, 0, sizeof(resp));
2765 resp.flow_handle = uobj->id;
2766
2767 err = ib_copy_to_udata(ucore,
2768 &resp, sizeof(resp));
2769 if (err)
2770 goto err_copy;
2771
2772 put_qp_read(qp);
2773 mutex_lock(&file->mutex);
2774 list_add_tail(&uobj->list, &file->ucontext->rule_list);
2775 mutex_unlock(&file->mutex);
2776
2777 uobj->live = 1;
2778
2779 up_write(&uobj->mutex);
2780 kfree(flow_attr);
2781 if (cmd.flow_attr.num_of_specs)
2782 kfree(kern_flow_attr);
2783 return 0;
2784 err_copy:
2785 idr_remove_uobj(&ib_uverbs_rule_idr, uobj);
2786 destroy_flow:
2787 ib_destroy_flow(flow_id);
2788 err_free:
2789 kfree(flow_attr);
2790 err_put:
2791 put_qp_read(qp);
2792 err_uobj:
2793 put_uobj_write(uobj);
2794 err_free_attr:
2795 if (cmd.flow_attr.num_of_specs)
2796 kfree(kern_flow_attr);
2797 return err;
2798 }
2799
2800 int ib_uverbs_ex_destroy_flow(struct ib_uverbs_file *file,
2801 struct ib_udata *ucore,
2802 struct ib_udata *uhw)
2803 {
2804 struct ib_uverbs_destroy_flow cmd;
2805 struct ib_flow *flow_id;
2806 struct ib_uobject *uobj;
2807 int ret;
2808
2809 if (ucore->inlen < sizeof(cmd))
2810 return -EINVAL;
2811
2812 ret = ib_copy_from_udata(&cmd, ucore, sizeof(cmd));
2813 if (ret)
2814 return ret;
2815
2816 if (cmd.comp_mask)
2817 return -EINVAL;
2818
2819 uobj = idr_write_uobj(&ib_uverbs_rule_idr, cmd.flow_handle,
2820 file->ucontext);
2821 if (!uobj)
2822 return -EINVAL;
2823 flow_id = uobj->object;
2824
2825 ret = ib_destroy_flow(flow_id);
2826 if (!ret)
2827 uobj->live = 0;
2828
2829 put_uobj_write(uobj);
2830
2831 idr_remove_uobj(&ib_uverbs_rule_idr, uobj);
2832
2833 mutex_lock(&file->mutex);
2834 list_del(&uobj->list);
2835 mutex_unlock(&file->mutex);
2836
2837 put_uobj(uobj);
2838
2839 return ret;
2840 }
2841
2842 static int __uverbs_create_xsrq(struct ib_uverbs_file *file,
2843 struct ib_uverbs_create_xsrq *cmd,
2844 struct ib_udata *udata)
2845 {
2846 struct ib_uverbs_create_srq_resp resp;
2847 struct ib_usrq_object *obj;
2848 struct ib_pd *pd;
2849 struct ib_srq *srq;
2850 struct ib_uobject *uninitialized_var(xrcd_uobj);
2851 struct ib_srq_init_attr attr;
2852 int ret;
2853
2854 obj = kmalloc(sizeof *obj, GFP_KERNEL);
2855 if (!obj)
2856 return -ENOMEM;
2857
2858 init_uobj(&obj->uevent.uobject, cmd->user_handle, file->ucontext, &srq_lock_class);
2859 down_write(&obj->uevent.uobject.mutex);
2860
2861 if (cmd->srq_type == IB_SRQT_XRC) {
2862 attr.ext.xrc.xrcd = idr_read_xrcd(cmd->xrcd_handle, file->ucontext, &xrcd_uobj);
2863 if (!attr.ext.xrc.xrcd) {
2864 ret = -EINVAL;
2865 goto err;
2866 }
2867
2868 obj->uxrcd = container_of(xrcd_uobj, struct ib_uxrcd_object, uobject);
2869 atomic_inc(&obj->uxrcd->refcnt);
2870
2871 attr.ext.xrc.cq = idr_read_cq(cmd->cq_handle, file->ucontext, 0);
2872 if (!attr.ext.xrc.cq) {
2873 ret = -EINVAL;
2874 goto err_put_xrcd;
2875 }
2876 }
2877
2878 pd = idr_read_pd(cmd->pd_handle, file->ucontext);
2879 if (!pd) {
2880 ret = -EINVAL;
2881 goto err_put_cq;
2882 }
2883
2884 attr.event_handler = ib_uverbs_srq_event_handler;
2885 attr.srq_context = file;
2886 attr.srq_type = cmd->srq_type;
2887 attr.attr.max_wr = cmd->max_wr;
2888 attr.attr.max_sge = cmd->max_sge;
2889 attr.attr.srq_limit = cmd->srq_limit;
2890
2891 obj->uevent.events_reported = 0;
2892 INIT_LIST_HEAD(&obj->uevent.event_list);
2893
2894 srq = pd->device->create_srq(pd, &attr, udata);
2895 if (IS_ERR(srq)) {
2896 ret = PTR_ERR(srq);
2897 goto err_put;
2898 }
2899
2900 srq->device = pd->device;
2901 srq->pd = pd;
2902 srq->srq_type = cmd->srq_type;
2903 srq->uobject = &obj->uevent.uobject;
2904 srq->event_handler = attr.event_handler;
2905 srq->srq_context = attr.srq_context;
2906
2907 if (cmd->srq_type == IB_SRQT_XRC) {
2908 srq->ext.xrc.cq = attr.ext.xrc.cq;
2909 srq->ext.xrc.xrcd = attr.ext.xrc.xrcd;
2910 atomic_inc(&attr.ext.xrc.cq->usecnt);
2911 atomic_inc(&attr.ext.xrc.xrcd->usecnt);
2912 }
2913
2914 atomic_inc(&pd->usecnt);
2915 atomic_set(&srq->usecnt, 0);
2916
2917 obj->uevent.uobject.object = srq;
2918 ret = idr_add_uobj(&ib_uverbs_srq_idr, &obj->uevent.uobject);
2919 if (ret)
2920 goto err_destroy;
2921
2922 memset(&resp, 0, sizeof resp);
2923 resp.srq_handle = obj->uevent.uobject.id;
2924 resp.max_wr = attr.attr.max_wr;
2925 resp.max_sge = attr.attr.max_sge;
2926 if (cmd->srq_type == IB_SRQT_XRC)
2927 resp.srqn = srq->ext.xrc.srq_num;
2928
2929 if (copy_to_user((void __user *) (unsigned long) cmd->response,
2930 &resp, sizeof resp)) {
2931 ret = -EFAULT;
2932 goto err_copy;
2933 }
2934
2935 if (cmd->srq_type == IB_SRQT_XRC) {
2936 put_uobj_read(xrcd_uobj);
2937 put_cq_read(attr.ext.xrc.cq);
2938 }
2939 put_pd_read(pd);
2940
2941 mutex_lock(&file->mutex);
2942 list_add_tail(&obj->uevent.uobject.list, &file->ucontext->srq_list);
2943 mutex_unlock(&file->mutex);
2944
2945 obj->uevent.uobject.live = 1;
2946
2947 up_write(&obj->uevent.uobject.mutex);
2948
2949 return 0;
2950
2951 err_copy:
2952 idr_remove_uobj(&ib_uverbs_srq_idr, &obj->uevent.uobject);
2953
2954 err_destroy:
2955 ib_destroy_srq(srq);
2956
2957 err_put:
2958 put_pd_read(pd);
2959
2960 err_put_cq:
2961 if (cmd->srq_type == IB_SRQT_XRC)
2962 put_cq_read(attr.ext.xrc.cq);
2963
2964 err_put_xrcd:
2965 if (cmd->srq_type == IB_SRQT_XRC) {
2966 atomic_dec(&obj->uxrcd->refcnt);
2967 put_uobj_read(xrcd_uobj);
2968 }
2969
2970 err:
2971 put_uobj_write(&obj->uevent.uobject);
2972 return ret;
2973 }
2974
2975 ssize_t ib_uverbs_create_srq(struct ib_uverbs_file *file,
2976 const char __user *buf, int in_len,
2977 int out_len)
2978 {
2979 struct ib_uverbs_create_srq cmd;
2980 struct ib_uverbs_create_xsrq xcmd;
2981 struct ib_uverbs_create_srq_resp resp;
2982 struct ib_udata udata;
2983 int ret;
2984
2985 if (out_len < sizeof resp)
2986 return -ENOSPC;
2987
2988 if (copy_from_user(&cmd, buf, sizeof cmd))
2989 return -EFAULT;
2990
2991 xcmd.response = cmd.response;
2992 xcmd.user_handle = cmd.user_handle;
2993 xcmd.srq_type = IB_SRQT_BASIC;
2994 xcmd.pd_handle = cmd.pd_handle;
2995 xcmd.max_wr = cmd.max_wr;
2996 xcmd.max_sge = cmd.max_sge;
2997 xcmd.srq_limit = cmd.srq_limit;
2998
2999 INIT_UDATA(&udata, buf + sizeof cmd,
3000 (unsigned long) cmd.response + sizeof resp,
3001 in_len - sizeof cmd, out_len - sizeof resp);
3002
3003 ret = __uverbs_create_xsrq(file, &xcmd, &udata);
3004 if (ret)
3005 return ret;
3006
3007 return in_len;
3008 }
3009
3010 ssize_t ib_uverbs_create_xsrq(struct ib_uverbs_file *file,
3011 const char __user *buf, int in_len, int out_len)
3012 {
3013 struct ib_uverbs_create_xsrq cmd;
3014 struct ib_uverbs_create_srq_resp resp;
3015 struct ib_udata udata;
3016 int ret;
3017
3018 if (out_len < sizeof resp)
3019 return -ENOSPC;
3020
3021 if (copy_from_user(&cmd, buf, sizeof cmd))
3022 return -EFAULT;
3023
3024 INIT_UDATA(&udata, buf + sizeof cmd,
3025 (unsigned long) cmd.response + sizeof resp,
3026 in_len - sizeof cmd, out_len - sizeof resp);
3027
3028 ret = __uverbs_create_xsrq(file, &cmd, &udata);
3029 if (ret)
3030 return ret;
3031
3032 return in_len;
3033 }
3034
3035 ssize_t ib_uverbs_modify_srq(struct ib_uverbs_file *file,
3036 const char __user *buf, int in_len,
3037 int out_len)
3038 {
3039 struct ib_uverbs_modify_srq cmd;
3040 struct ib_udata udata;
3041 struct ib_srq *srq;
3042 struct ib_srq_attr attr;
3043 int ret;
3044
3045 if (copy_from_user(&cmd, buf, sizeof cmd))
3046 return -EFAULT;
3047
3048 INIT_UDATA(&udata, buf + sizeof cmd, NULL, in_len - sizeof cmd,
3049 out_len);
3050
3051 srq = idr_read_srq(cmd.srq_handle, file->ucontext);
3052 if (!srq)
3053 return -EINVAL;
3054
3055 attr.max_wr = cmd.max_wr;
3056 attr.srq_limit = cmd.srq_limit;
3057
3058 ret = srq->device->modify_srq(srq, &attr, cmd.attr_mask, &udata);
3059
3060 put_srq_read(srq);
3061
3062 return ret ? ret : in_len;
3063 }
3064
3065 ssize_t ib_uverbs_query_srq(struct ib_uverbs_file *file,
3066 const char __user *buf,
3067 int in_len, int out_len)
3068 {
3069 struct ib_uverbs_query_srq cmd;
3070 struct ib_uverbs_query_srq_resp resp;
3071 struct ib_srq_attr attr;
3072 struct ib_srq *srq;
3073 int ret;
3074
3075 if (out_len < sizeof resp)
3076 return -ENOSPC;
3077
3078 if (copy_from_user(&cmd, buf, sizeof cmd))
3079 return -EFAULT;
3080
3081 srq = idr_read_srq(cmd.srq_handle, file->ucontext);
3082 if (!srq)
3083 return -EINVAL;
3084
3085 ret = ib_query_srq(srq, &attr);
3086
3087 put_srq_read(srq);
3088
3089 if (ret)
3090 return ret;
3091
3092 memset(&resp, 0, sizeof resp);
3093
3094 resp.max_wr = attr.max_wr;
3095 resp.max_sge = attr.max_sge;
3096 resp.srq_limit = attr.srq_limit;
3097
3098 if (copy_to_user((void __user *) (unsigned long) cmd.response,
3099 &resp, sizeof resp))
3100 return -EFAULT;
3101
3102 return in_len;
3103 }
3104
3105 ssize_t ib_uverbs_destroy_srq(struct ib_uverbs_file *file,
3106 const char __user *buf, int in_len,
3107 int out_len)
3108 {
3109 struct ib_uverbs_destroy_srq cmd;
3110 struct ib_uverbs_destroy_srq_resp resp;
3111 struct ib_uobject *uobj;
3112 struct ib_srq *srq;
3113 struct ib_uevent_object *obj;
3114 int ret = -EINVAL;
3115 struct ib_usrq_object *us;
3116 enum ib_srq_type srq_type;
3117
3118 if (copy_from_user(&cmd, buf, sizeof cmd))
3119 return -EFAULT;
3120
3121 uobj = idr_write_uobj(&ib_uverbs_srq_idr, cmd.srq_handle, file->ucontext);
3122 if (!uobj)
3123 return -EINVAL;
3124 srq = uobj->object;
3125 obj = container_of(uobj, struct ib_uevent_object, uobject);
3126 srq_type = srq->srq_type;
3127
3128 ret = ib_destroy_srq(srq);
3129 if (!ret)
3130 uobj->live = 0;
3131
3132 put_uobj_write(uobj);
3133
3134 if (ret)
3135 return ret;
3136
3137 if (srq_type == IB_SRQT_XRC) {
3138 us = container_of(obj, struct ib_usrq_object, uevent);
3139 atomic_dec(&us->uxrcd->refcnt);
3140 }
3141
3142 idr_remove_uobj(&ib_uverbs_srq_idr, uobj);
3143
3144 mutex_lock(&file->mutex);
3145 list_del(&uobj->list);
3146 mutex_unlock(&file->mutex);
3147
3148 ib_uverbs_release_uevent(file, obj);
3149
3150 memset(&resp, 0, sizeof resp);
3151 resp.events_reported = obj->events_reported;
3152
3153 put_uobj(uobj);
3154
3155 if (copy_to_user((void __user *) (unsigned long) cmd.response,
3156 &resp, sizeof resp))
3157 ret = -EFAULT;
3158
3159 return ret ? ret : in_len;
3160 }
Linux with added FPC-III support