| 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 <asm/uaccess.h> |
| 42 | |
| 43 | #include "uverbs.h" |
| 44 | #include "core_priv.h" |
| 45 | |
| 46 | struct uverbs_lock_class { |
| 47 | struct lock_class_key key; |
| 48 | char name[16]; |
| 49 | }; |
| 50 | |
| 51 | static struct uverbs_lock_class pd_lock_class = { .name = "PD-uobj" }; |
| 52 | static struct uverbs_lock_class mr_lock_class = { .name = "MR-uobj" }; |
| 53 | static struct uverbs_lock_class mw_lock_class = { .name = "MW-uobj" }; |
| 54 | static struct uverbs_lock_class cq_lock_class = { .name = "CQ-uobj" }; |
| 55 | static struct uverbs_lock_class qp_lock_class = { .name = "QP-uobj" }; |
| 56 | static struct uverbs_lock_class ah_lock_class = { .name = "AH-uobj" }; |
| 57 | static struct uverbs_lock_class srq_lock_class = { .name = "SRQ-uobj" }; |
| 58 | static struct uverbs_lock_class xrcd_lock_class = { .name = "XRCD-uobj" }; |
| 59 | static struct uverbs_lock_class rule_lock_class = { .name = "RULE-uobj" }; |
| 60 | |
| 61 | /* |
| 62 | * The ib_uobject locking scheme is as follows: |
| 63 | * |
| 64 | * - ib_uverbs_idr_lock protects the uverbs idrs themselves, so it |
| 65 | * needs to be held during all idr write operations. When an object is |
| 66 | * looked up, a reference must be taken on the object's kref before |
| 67 | * dropping this lock. For read operations, the rcu_read_lock() |
| 68 | * and rcu_write_lock() but similarly the kref reference is grabbed |
| 69 | * before the rcu_read_unlock(). |
| 70 | * |
| 71 | * - Each object also has an rwsem. This rwsem must be held for |
| 72 | * reading while an operation that uses the object is performed. |
| 73 | * For example, while registering an MR, the associated PD's |
| 74 | * uobject.mutex must be held for reading. The rwsem must be held |
| 75 | * for writing while initializing or destroying an object. |
| 76 | * |
| 77 | * - In addition, each object has a "live" flag. If this flag is not |
| 78 | * set, then lookups of the object will fail even if it is found in |
| 79 | * the idr. This handles a reader that blocks and does not acquire |
| 80 | * the rwsem until after the object is destroyed. The destroy |
| 81 | * operation will set the live flag to 0 and then drop the rwsem; |
| 82 | * this will allow the reader to acquire the rwsem, see that the |
| 83 | * live flag is 0, and then drop the rwsem and its reference to |
| 84 | * object. The underlying storage will not be freed until the last |
| 85 | * reference to the object is dropped. |
| 86 | */ |
| 87 | |
| 88 | static void init_uobj(struct ib_uobject *uobj, u64 user_handle, |
| 89 | struct ib_ucontext *context, struct uverbs_lock_class *c) |
| 90 | { |
| 91 | uobj->user_handle = user_handle; |
| 92 | uobj->context = context; |
| 93 | kref_init(&uobj->ref); |
| 94 | init_rwsem(&uobj->mutex); |
| 95 | lockdep_set_class_and_name(&uobj->mutex, &c->key, c->name); |
| 96 | uobj->live = 0; |
| 97 | } |
| 98 | |
| 99 | static void release_uobj(struct kref *kref) |
| 100 | { |
| 101 | kfree_rcu(container_of(kref, struct ib_uobject, ref), rcu); |
| 102 | } |
| 103 | |
| 104 | static void put_uobj(struct ib_uobject *uobj) |
| 105 | { |
| 106 | kref_put(&uobj->ref, release_uobj); |
| 107 | } |
| 108 | |
| 109 | static void put_uobj_read(struct ib_uobject *uobj) |
| 110 | { |
| 111 | up_read(&uobj->mutex); |
| 112 | put_uobj(uobj); |
| 113 | } |
| 114 | |
| 115 | static void put_uobj_write(struct ib_uobject *uobj) |
| 116 | { |
| 117 | up_write(&uobj->mutex); |
| 118 | put_uobj(uobj); |
| 119 | } |
| 120 | |
| 121 | static int idr_add_uobj(struct idr *idr, struct ib_uobject *uobj) |
| 122 | { |
| 123 | int ret; |
| 124 | |
| 125 | idr_preload(GFP_KERNEL); |
| 126 | spin_lock(&ib_uverbs_idr_lock); |
| 127 | |
| 128 | ret = idr_alloc(idr, uobj, 0, 0, GFP_NOWAIT); |
| 129 | if (ret >= 0) |
| 130 | uobj->id = ret; |
| 131 | |
| 132 | spin_unlock(&ib_uverbs_idr_lock); |
| 133 | idr_preload_end(); |
| 134 | |
| 135 | return ret < 0 ? ret : 0; |
| 136 | } |
| 137 | |
| 138 | void idr_remove_uobj(struct idr *idr, struct ib_uobject *uobj) |
| 139 | { |
| 140 | spin_lock(&ib_uverbs_idr_lock); |
| 141 | idr_remove(idr, uobj->id); |
| 142 | spin_unlock(&ib_uverbs_idr_lock); |
| 143 | } |
| 144 | |
| 145 | static struct ib_uobject *__idr_get_uobj(struct idr *idr, int id, |
| 146 | struct ib_ucontext *context) |
| 147 | { |
| 148 | struct ib_uobject *uobj; |
| 149 | |
| 150 | rcu_read_lock(); |
| 151 | uobj = idr_find(idr, id); |
| 152 | if (uobj) { |
| 153 | if (uobj->context == context) |
| 154 | kref_get(&uobj->ref); |
| 155 | else |
| 156 | uobj = NULL; |
| 157 | } |
| 158 | rcu_read_unlock(); |
| 159 | |
| 160 | return uobj; |
| 161 | } |
| 162 | |
| 163 | static struct ib_uobject *idr_read_uobj(struct idr *idr, int id, |
| 164 | struct ib_ucontext *context, int nested) |
| 165 | { |
| 166 | struct ib_uobject *uobj; |
| 167 | |
| 168 | uobj = __idr_get_uobj(idr, id, context); |
| 169 | if (!uobj) |
| 170 | return NULL; |
| 171 | |
| 172 | if (nested) |
| 173 | down_read_nested(&uobj->mutex, SINGLE_DEPTH_NESTING); |
| 174 | else |
| 175 | down_read(&uobj->mutex); |
| 176 | if (!uobj->live) { |
| 177 | put_uobj_read(uobj); |
| 178 | return NULL; |
| 179 | } |
| 180 | |
| 181 | return uobj; |
| 182 | } |
| 183 | |
| 184 | static struct ib_uobject *idr_write_uobj(struct idr *idr, int id, |
| 185 | struct ib_ucontext *context) |
| 186 | { |
| 187 | struct ib_uobject *uobj; |
| 188 | |
| 189 | uobj = __idr_get_uobj(idr, id, context); |
| 190 | if (!uobj) |
| 191 | return NULL; |
| 192 | |
| 193 | down_write(&uobj->mutex); |
| 194 | if (!uobj->live) { |
| 195 | put_uobj_write(uobj); |
| 196 | return NULL; |
| 197 | } |
| 198 | |
| 199 | return uobj; |
| 200 | } |
| 201 | |
| 202 | static void *idr_read_obj(struct idr *idr, int id, struct ib_ucontext *context, |
| 203 | int nested) |
| 204 | { |
| 205 | struct ib_uobject *uobj; |
| 206 | |
| 207 | uobj = idr_read_uobj(idr, id, context, nested); |
| 208 | return uobj ? uobj->object : NULL; |
| 209 | } |
| 210 | |
| 211 | static struct ib_pd *idr_read_pd(int pd_handle, struct ib_ucontext *context) |
| 212 | { |
| 213 | return idr_read_obj(&ib_uverbs_pd_idr, pd_handle, context, 0); |
| 214 | } |
| 215 | |
| 216 | static void put_pd_read(struct ib_pd *pd) |
| 217 | { |
| 218 | put_uobj_read(pd->uobject); |
| 219 | } |
| 220 | |
| 221 | static struct ib_cq *idr_read_cq(int cq_handle, struct ib_ucontext *context, int nested) |
| 222 | { |
| 223 | return idr_read_obj(&ib_uverbs_cq_idr, cq_handle, context, nested); |
| 224 | } |
| 225 | |
| 226 | static void put_cq_read(struct ib_cq *cq) |
| 227 | { |
| 228 | put_uobj_read(cq->uobject); |
| 229 | } |
| 230 | |
| 231 | static struct ib_ah *idr_read_ah(int ah_handle, struct ib_ucontext *context) |
| 232 | { |
| 233 | return idr_read_obj(&ib_uverbs_ah_idr, ah_handle, context, 0); |
| 234 | } |
| 235 | |
| 236 | static void put_ah_read(struct ib_ah *ah) |
| 237 | { |
| 238 | put_uobj_read(ah->uobject); |
| 239 | } |
| 240 | |
| 241 | static struct ib_qp *idr_read_qp(int qp_handle, struct ib_ucontext *context) |
| 242 | { |
| 243 | return idr_read_obj(&ib_uverbs_qp_idr, qp_handle, context, 0); |
| 244 | } |
| 245 | |
| 246 | static struct ib_qp *idr_write_qp(int qp_handle, struct ib_ucontext *context) |
| 247 | { |
| 248 | struct ib_uobject *uobj; |
| 249 | |
| 250 | uobj = idr_write_uobj(&ib_uverbs_qp_idr, qp_handle, context); |
| 251 | return uobj ? uobj->object : NULL; |
| 252 | } |
| 253 | |
| 254 | static void put_qp_read(struct ib_qp *qp) |
| 255 | { |
| 256 | put_uobj_read(qp->uobject); |
| 257 | } |
| 258 | |
| 259 | static void put_qp_write(struct ib_qp *qp) |
| 260 | { |
| 261 | put_uobj_write(qp->uobject); |
| 262 | } |
| 263 | |
| 264 | static struct ib_srq *idr_read_srq(int srq_handle, struct ib_ucontext *context) |
| 265 | { |
| 266 | return idr_read_obj(&ib_uverbs_srq_idr, srq_handle, context, 0); |
| 267 | } |
| 268 | |
| 269 | static void put_srq_read(struct ib_srq *srq) |
| 270 | { |
| 271 | put_uobj_read(srq->uobject); |
| 272 | } |
| 273 | |
| 274 | static struct ib_xrcd *idr_read_xrcd(int xrcd_handle, struct ib_ucontext *context, |
| 275 | struct ib_uobject **uobj) |
| 276 | { |
| 277 | *uobj = idr_read_uobj(&ib_uverbs_xrcd_idr, xrcd_handle, context, 0); |
| 278 | return *uobj ? (*uobj)->object : NULL; |
| 279 | } |
| 280 | |
| 281 | static void put_xrcd_read(struct ib_uobject *uobj) |
| 282 | { |
| 283 | put_uobj_read(uobj); |
| 284 | } |
| 285 | |
| 286 | ssize_t ib_uverbs_get_context(struct ib_uverbs_file *file, |
| 287 | struct ib_device *ib_dev, |
| 288 | const char __user *buf, |
| 289 | int in_len, int out_len) |
| 290 | { |
| 291 | struct ib_uverbs_get_context cmd; |
| 292 | struct ib_uverbs_get_context_resp resp; |
| 293 | struct ib_udata udata; |
| 294 | struct ib_ucontext *ucontext; |
| 295 | struct file *filp; |
| 296 | int ret; |
| 297 | |
| 298 | if (out_len < sizeof resp) |
| 299 | return -ENOSPC; |
| 300 | |
| 301 | if (copy_from_user(&cmd, buf, sizeof cmd)) |
| 302 | return -EFAULT; |
| 303 | |
| 304 | mutex_lock(&file->mutex); |
| 305 | |
| 306 | if (file->ucontext) { |
| 307 | ret = -EINVAL; |
| 308 | goto err; |
| 309 | } |
| 310 | |
| 311 | INIT_UDATA(&udata, buf + sizeof cmd, |
| 312 | (unsigned long) cmd.response + sizeof resp, |
| 313 | in_len - sizeof cmd, out_len - sizeof resp); |
| 314 | |
| 315 | ucontext = ib_dev->alloc_ucontext(ib_dev, &udata); |
| 316 | if (IS_ERR(ucontext)) { |
| 317 | ret = PTR_ERR(ucontext); |
| 318 | goto err; |
| 319 | } |
| 320 | |
| 321 | ucontext->device = ib_dev; |
| 322 | INIT_LIST_HEAD(&ucontext->pd_list); |
| 323 | INIT_LIST_HEAD(&ucontext->mr_list); |
| 324 | INIT_LIST_HEAD(&ucontext->mw_list); |
| 325 | INIT_LIST_HEAD(&ucontext->cq_list); |
| 326 | INIT_LIST_HEAD(&ucontext->qp_list); |
| 327 | INIT_LIST_HEAD(&ucontext->srq_list); |
| 328 | INIT_LIST_HEAD(&ucontext->ah_list); |
| 329 | INIT_LIST_HEAD(&ucontext->xrcd_list); |
| 330 | INIT_LIST_HEAD(&ucontext->rule_list); |
| 331 | rcu_read_lock(); |
| 332 | ucontext->tgid = get_task_pid(current->group_leader, PIDTYPE_PID); |
| 333 | rcu_read_unlock(); |
| 334 | ucontext->closing = 0; |
| 335 | |
| 336 | #ifdef CONFIG_INFINIBAND_ON_DEMAND_PAGING |
| 337 | ucontext->umem_tree = RB_ROOT; |
| 338 | init_rwsem(&ucontext->umem_rwsem); |
| 339 | ucontext->odp_mrs_count = 0; |
| 340 | INIT_LIST_HEAD(&ucontext->no_private_counters); |
| 341 | |
| 342 | if (!(ib_dev->attrs.device_cap_flags & IB_DEVICE_ON_DEMAND_PAGING)) |
| 343 | ucontext->invalidate_range = NULL; |
| 344 | |
| 345 | #endif |
| 346 | |
| 347 | resp.num_comp_vectors = file->device->num_comp_vectors; |
| 348 | |
| 349 | ret = get_unused_fd_flags(O_CLOEXEC); |
| 350 | if (ret < 0) |
| 351 | goto err_free; |
| 352 | resp.async_fd = ret; |
| 353 | |
| 354 | filp = ib_uverbs_alloc_event_file(file, ib_dev, 1); |
| 355 | if (IS_ERR(filp)) { |
| 356 | ret = PTR_ERR(filp); |
| 357 | goto err_fd; |
| 358 | } |
| 359 | |
| 360 | if (copy_to_user((void __user *) (unsigned long) cmd.response, |
| 361 | &resp, sizeof resp)) { |
| 362 | ret = -EFAULT; |
| 363 | goto err_file; |
| 364 | } |
| 365 | |
| 366 | file->ucontext = ucontext; |
| 367 | |
| 368 | fd_install(resp.async_fd, filp); |
| 369 | |
| 370 | mutex_unlock(&file->mutex); |
| 371 | |
| 372 | return in_len; |
| 373 | |
| 374 | err_file: |
| 375 | ib_uverbs_free_async_event_file(file); |
| 376 | fput(filp); |
| 377 | |
| 378 | err_fd: |
| 379 | put_unused_fd(resp.async_fd); |
| 380 | |
| 381 | err_free: |
| 382 | put_pid(ucontext->tgid); |
| 383 | ib_dev->dealloc_ucontext(ucontext); |
| 384 | |
| 385 | err: |
| 386 | mutex_unlock(&file->mutex); |
| 387 | return ret; |
| 388 | } |
| 389 | |
| 390 | static void copy_query_dev_fields(struct ib_uverbs_file *file, |
| 391 | struct ib_device *ib_dev, |
| 392 | struct ib_uverbs_query_device_resp *resp, |
| 393 | struct ib_device_attr *attr) |
| 394 | { |
| 395 | resp->fw_ver = attr->fw_ver; |
| 396 | resp->node_guid = ib_dev->node_guid; |
| 397 | resp->sys_image_guid = attr->sys_image_guid; |
| 398 | resp->max_mr_size = attr->max_mr_size; |
| 399 | resp->page_size_cap = attr->page_size_cap; |
| 400 | resp->vendor_id = attr->vendor_id; |
| 401 | resp->vendor_part_id = attr->vendor_part_id; |
| 402 | resp->hw_ver = attr->hw_ver; |
| 403 | resp->max_qp = attr->max_qp; |
| 404 | resp->max_qp_wr = attr->max_qp_wr; |
| 405 | resp->device_cap_flags = lower_32_bits(attr->device_cap_flags); |
| 406 | resp->max_sge = attr->max_sge; |
| 407 | resp->max_sge_rd = attr->max_sge_rd; |
| 408 | resp->max_cq = attr->max_cq; |
| 409 | resp->max_cqe = attr->max_cqe; |
| 410 | resp->max_mr = attr->max_mr; |
| 411 | resp->max_pd = attr->max_pd; |
| 412 | resp->max_qp_rd_atom = attr->max_qp_rd_atom; |
| 413 | resp->max_ee_rd_atom = attr->max_ee_rd_atom; |
| 414 | resp->max_res_rd_atom = attr->max_res_rd_atom; |
| 415 | resp->max_qp_init_rd_atom = attr->max_qp_init_rd_atom; |
| 416 | resp->max_ee_init_rd_atom = attr->max_ee_init_rd_atom; |
| 417 | resp->atomic_cap = attr->atomic_cap; |
| 418 | resp->max_ee = attr->max_ee; |
| 419 | resp->max_rdd = attr->max_rdd; |
| 420 | resp->max_mw = attr->max_mw; |
| 421 | resp->max_raw_ipv6_qp = attr->max_raw_ipv6_qp; |
| 422 | resp->max_raw_ethy_qp = attr->max_raw_ethy_qp; |
| 423 | resp->max_mcast_grp = attr->max_mcast_grp; |
| 424 | resp->max_mcast_qp_attach = attr->max_mcast_qp_attach; |
| 425 | resp->max_total_mcast_qp_attach = attr->max_total_mcast_qp_attach; |
| 426 | resp->max_ah = attr->max_ah; |
| 427 | resp->max_fmr = attr->max_fmr; |
| 428 | resp->max_map_per_fmr = attr->max_map_per_fmr; |
| 429 | resp->max_srq = attr->max_srq; |
| 430 | resp->max_srq_wr = attr->max_srq_wr; |
| 431 | resp->max_srq_sge = attr->max_srq_sge; |
| 432 | resp->max_pkeys = attr->max_pkeys; |
| 433 | resp->local_ca_ack_delay = attr->local_ca_ack_delay; |
| 434 | resp->phys_port_cnt = ib_dev->phys_port_cnt; |
| 435 | } |
| 436 | |
| 437 | ssize_t ib_uverbs_query_device(struct ib_uverbs_file *file, |
| 438 | struct ib_device *ib_dev, |
| 439 | const char __user *buf, |
| 440 | int in_len, int out_len) |
| 441 | { |
| 442 | struct ib_uverbs_query_device cmd; |
| 443 | struct ib_uverbs_query_device_resp resp; |
| 444 | |
| 445 | if (out_len < sizeof resp) |
| 446 | return -ENOSPC; |
| 447 | |
| 448 | if (copy_from_user(&cmd, buf, sizeof cmd)) |
| 449 | return -EFAULT; |
| 450 | |
| 451 | memset(&resp, 0, sizeof resp); |
| 452 | copy_query_dev_fields(file, ib_dev, &resp, &ib_dev->attrs); |
| 453 | |
| 454 | if (copy_to_user((void __user *) (unsigned long) cmd.response, |
| 455 | &resp, sizeof resp)) |
| 456 | return -EFAULT; |
| 457 | |
| 458 | return in_len; |
| 459 | } |
| 460 | |
| 461 | ssize_t ib_uverbs_query_port(struct ib_uverbs_file *file, |
| 462 | struct ib_device *ib_dev, |
| 463 | const char __user *buf, |
| 464 | int in_len, int out_len) |
| 465 | { |
| 466 | struct ib_uverbs_query_port cmd; |
| 467 | struct ib_uverbs_query_port_resp resp; |
| 468 | struct ib_port_attr attr; |
| 469 | int ret; |
| 470 | |
| 471 | if (out_len < sizeof resp) |
| 472 | return -ENOSPC; |
| 473 | |
| 474 | if (copy_from_user(&cmd, buf, sizeof cmd)) |
| 475 | return -EFAULT; |
| 476 | |
| 477 | ret = ib_query_port(ib_dev, cmd.port_num, &attr); |
| 478 | if (ret) |
| 479 | return ret; |
| 480 | |
| 481 | memset(&resp, 0, sizeof resp); |
| 482 | |
| 483 | resp.state = attr.state; |
| 484 | resp.max_mtu = attr.max_mtu; |
| 485 | resp.active_mtu = attr.active_mtu; |
| 486 | resp.gid_tbl_len = attr.gid_tbl_len; |
| 487 | resp.port_cap_flags = attr.port_cap_flags; |
| 488 | resp.max_msg_sz = attr.max_msg_sz; |
| 489 | resp.bad_pkey_cntr = attr.bad_pkey_cntr; |
| 490 | resp.qkey_viol_cntr = attr.qkey_viol_cntr; |
| 491 | resp.pkey_tbl_len = attr.pkey_tbl_len; |
| 492 | resp.lid = attr.lid; |
| 493 | resp.sm_lid = attr.sm_lid; |
| 494 | resp.lmc = attr.lmc; |
| 495 | resp.max_vl_num = attr.max_vl_num; |
| 496 | resp.sm_sl = attr.sm_sl; |
| 497 | resp.subnet_timeout = attr.subnet_timeout; |
| 498 | resp.init_type_reply = attr.init_type_reply; |
| 499 | resp.active_width = attr.active_width; |
| 500 | resp.active_speed = attr.active_speed; |
| 501 | resp.phys_state = attr.phys_state; |
| 502 | resp.link_layer = rdma_port_get_link_layer(ib_dev, |
| 503 | cmd.port_num); |
| 504 | |
| 505 | if (copy_to_user((void __user *) (unsigned long) cmd.response, |
| 506 | &resp, sizeof resp)) |
| 507 | return -EFAULT; |
| 508 | |
| 509 | return in_len; |
| 510 | } |
| 511 | |
| 512 | ssize_t ib_uverbs_alloc_pd(struct ib_uverbs_file *file, |
| 513 | struct ib_device *ib_dev, |
| 514 | const char __user *buf, |
| 515 | int in_len, int out_len) |
| 516 | { |
| 517 | struct ib_uverbs_alloc_pd cmd; |
| 518 | struct ib_uverbs_alloc_pd_resp resp; |
| 519 | struct ib_udata udata; |
| 520 | struct ib_uobject *uobj; |
| 521 | struct ib_pd *pd; |
| 522 | int ret; |
| 523 | |
| 524 | if (out_len < sizeof resp) |
| 525 | return -ENOSPC; |
| 526 | |
| 527 | if (copy_from_user(&cmd, buf, sizeof cmd)) |
| 528 | return -EFAULT; |
| 529 | |
| 530 | INIT_UDATA(&udata, buf + sizeof cmd, |
| 531 | (unsigned long) cmd.response + sizeof resp, |
| 532 | in_len - sizeof cmd, out_len - sizeof resp); |
| 533 | |
| 534 | uobj = kmalloc(sizeof *uobj, GFP_KERNEL); |
| 535 | if (!uobj) |
| 536 | return -ENOMEM; |
| 537 | |
| 538 | init_uobj(uobj, 0, file->ucontext, &pd_lock_class); |
| 539 | down_write(&uobj->mutex); |
| 540 | |
| 541 | pd = ib_dev->alloc_pd(ib_dev, file->ucontext, &udata); |
| 542 | if (IS_ERR(pd)) { |
| 543 | ret = PTR_ERR(pd); |
| 544 | goto err; |
| 545 | } |
| 546 | |
| 547 | pd->device = ib_dev; |
| 548 | pd->uobject = uobj; |
| 549 | pd->local_mr = NULL; |
| 550 | atomic_set(&pd->usecnt, 0); |
| 551 | |
| 552 | uobj->object = pd; |
| 553 | ret = idr_add_uobj(&ib_uverbs_pd_idr, uobj); |
| 554 | if (ret) |
| 555 | goto err_idr; |
| 556 | |
| 557 | memset(&resp, 0, sizeof resp); |
| 558 | resp.pd_handle = uobj->id; |
| 559 | |
| 560 | if (copy_to_user((void __user *) (unsigned long) cmd.response, |
| 561 | &resp, sizeof resp)) { |
| 562 | ret = -EFAULT; |
| 563 | goto err_copy; |
| 564 | } |
| 565 | |
| 566 | mutex_lock(&file->mutex); |
| 567 | list_add_tail(&uobj->list, &file->ucontext->pd_list); |
| 568 | mutex_unlock(&file->mutex); |
| 569 | |
| 570 | uobj->live = 1; |
| 571 | |
| 572 | up_write(&uobj->mutex); |
| 573 | |
| 574 | return in_len; |
| 575 | |
| 576 | err_copy: |
| 577 | idr_remove_uobj(&ib_uverbs_pd_idr, uobj); |
| 578 | |
| 579 | err_idr: |
| 580 | ib_dealloc_pd(pd); |
| 581 | |
| 582 | err: |
| 583 | put_uobj_write(uobj); |
| 584 | return ret; |
| 585 | } |
| 586 | |
| 587 | ssize_t ib_uverbs_dealloc_pd(struct ib_uverbs_file *file, |
| 588 | struct ib_device *ib_dev, |
| 589 | const char __user *buf, |
| 590 | int in_len, int out_len) |
| 591 | { |
| 592 | struct ib_uverbs_dealloc_pd cmd; |
| 593 | struct ib_uobject *uobj; |
| 594 | struct ib_pd *pd; |
| 595 | int ret; |
| 596 | |
| 597 | if (copy_from_user(&cmd, buf, sizeof cmd)) |
| 598 | return -EFAULT; |
| 599 | |
| 600 | uobj = idr_write_uobj(&ib_uverbs_pd_idr, cmd.pd_handle, file->ucontext); |
| 601 | if (!uobj) |
| 602 | return -EINVAL; |
| 603 | pd = uobj->object; |
| 604 | |
| 605 | if (atomic_read(&pd->usecnt)) { |
| 606 | ret = -EBUSY; |
| 607 | goto err_put; |
| 608 | } |
| 609 | |
| 610 | ret = pd->device->dealloc_pd(uobj->object); |
| 611 | WARN_ONCE(ret, "Infiniband HW driver failed dealloc_pd"); |
| 612 | if (ret) |
| 613 | goto err_put; |
| 614 | |
| 615 | uobj->live = 0; |
| 616 | put_uobj_write(uobj); |
| 617 | |
| 618 | idr_remove_uobj(&ib_uverbs_pd_idr, uobj); |
| 619 | |
| 620 | mutex_lock(&file->mutex); |
| 621 | list_del(&uobj->list); |
| 622 | mutex_unlock(&file->mutex); |
| 623 | |
| 624 | put_uobj(uobj); |
| 625 | |
| 626 | return in_len; |
| 627 | |
| 628 | err_put: |
| 629 | put_uobj_write(uobj); |
| 630 | return ret; |
| 631 | } |
| 632 | |
| 633 | struct xrcd_table_entry { |
| 634 | struct rb_node node; |
| 635 | struct ib_xrcd *xrcd; |
| 636 | struct inode *inode; |
| 637 | }; |
| 638 | |
| 639 | static int xrcd_table_insert(struct ib_uverbs_device *dev, |
| 640 | struct inode *inode, |
| 641 | struct ib_xrcd *xrcd) |
| 642 | { |
| 643 | struct xrcd_table_entry *entry, *scan; |
| 644 | struct rb_node **p = &dev->xrcd_tree.rb_node; |
| 645 | struct rb_node *parent = NULL; |
| 646 | |
| 647 | entry = kmalloc(sizeof *entry, GFP_KERNEL); |
| 648 | if (!entry) |
| 649 | return -ENOMEM; |
| 650 | |
| 651 | entry->xrcd = xrcd; |
| 652 | entry->inode = inode; |
| 653 | |
| 654 | while (*p) { |
| 655 | parent = *p; |
| 656 | scan = rb_entry(parent, struct xrcd_table_entry, node); |
| 657 | |
| 658 | if (inode < scan->inode) { |
| 659 | p = &(*p)->rb_left; |
| 660 | } else if (inode > scan->inode) { |
| 661 | p = &(*p)->rb_right; |
| 662 | } else { |
| 663 | kfree(entry); |
| 664 | return -EEXIST; |
| 665 | } |
| 666 | } |
| 667 | |
| 668 | rb_link_node(&entry->node, parent, p); |
| 669 | rb_insert_color(&entry->node, &dev->xrcd_tree); |
| 670 | igrab(inode); |
| 671 | return 0; |
| 672 | } |
| 673 | |
| 674 | static struct xrcd_table_entry *xrcd_table_search(struct ib_uverbs_device *dev, |
| 675 | struct inode *inode) |
| 676 | { |
| 677 | struct xrcd_table_entry *entry; |
| 678 | struct rb_node *p = dev->xrcd_tree.rb_node; |
| 679 | |
| 680 | while (p) { |
| 681 | entry = rb_entry(p, struct xrcd_table_entry, node); |
| 682 | |
| 683 | if (inode < entry->inode) |
| 684 | p = p->rb_left; |
| 685 | else if (inode > entry->inode) |
| 686 | p = p->rb_right; |
| 687 | else |
| 688 | return entry; |
| 689 | } |
| 690 | |
| 691 | return NULL; |
| 692 | } |
| 693 | |
| 694 | static struct ib_xrcd *find_xrcd(struct ib_uverbs_device *dev, struct inode *inode) |
| 695 | { |
| 696 | struct xrcd_table_entry *entry; |
| 697 | |
| 698 | entry = xrcd_table_search(dev, inode); |
| 699 | if (!entry) |
| 700 | return NULL; |
| 701 | |
| 702 | return entry->xrcd; |
| 703 | } |
| 704 | |
| 705 | static void xrcd_table_delete(struct ib_uverbs_device *dev, |
| 706 | struct inode *inode) |
| 707 | { |
| 708 | struct xrcd_table_entry *entry; |
| 709 | |
| 710 | entry = xrcd_table_search(dev, inode); |
| 711 | if (entry) { |
| 712 | iput(inode); |
| 713 | rb_erase(&entry->node, &dev->xrcd_tree); |
| 714 | kfree(entry); |
| 715 | } |
| 716 | } |
| 717 | |
| 718 | ssize_t ib_uverbs_open_xrcd(struct ib_uverbs_file *file, |
| 719 | struct ib_device *ib_dev, |
| 720 | const char __user *buf, int in_len, |
| 721 | int out_len) |
| 722 | { |
| 723 | struct ib_uverbs_open_xrcd cmd; |
| 724 | struct ib_uverbs_open_xrcd_resp resp; |
| 725 | struct ib_udata udata; |
| 726 | struct ib_uxrcd_object *obj; |
| 727 | struct ib_xrcd *xrcd = NULL; |
| 728 | struct fd f = {NULL, 0}; |
| 729 | struct inode *inode = NULL; |
| 730 | int ret = 0; |
| 731 | int new_xrcd = 0; |
| 732 | |
| 733 | if (out_len < sizeof resp) |
| 734 | return -ENOSPC; |
| 735 | |
| 736 | if (copy_from_user(&cmd, buf, sizeof cmd)) |
| 737 | return -EFAULT; |
| 738 | |
| 739 | INIT_UDATA(&udata, buf + sizeof cmd, |
| 740 | (unsigned long) cmd.response + sizeof resp, |
| 741 | in_len - sizeof cmd, out_len - sizeof resp); |
| 742 | |
| 743 | mutex_lock(&file->device->xrcd_tree_mutex); |
| 744 | |
| 745 | if (cmd.fd != -1) { |
| 746 | /* search for file descriptor */ |
| 747 | f = fdget(cmd.fd); |
| 748 | if (!f.file) { |
| 749 | ret = -EBADF; |
| 750 | goto err_tree_mutex_unlock; |
| 751 | } |
| 752 | |
| 753 | inode = file_inode(f.file); |
| 754 | xrcd = find_xrcd(file->device, inode); |
| 755 | if (!xrcd && !(cmd.oflags & O_CREAT)) { |
| 756 | /* no file descriptor. Need CREATE flag */ |
| 757 | ret = -EAGAIN; |
| 758 | goto err_tree_mutex_unlock; |
| 759 | } |
| 760 | |
| 761 | if (xrcd && cmd.oflags & O_EXCL) { |
| 762 | ret = -EINVAL; |
| 763 | goto err_tree_mutex_unlock; |
| 764 | } |
| 765 | } |
| 766 | |
| 767 | obj = kmalloc(sizeof *obj, GFP_KERNEL); |
| 768 | if (!obj) { |
| 769 | ret = -ENOMEM; |
| 770 | goto err_tree_mutex_unlock; |
| 771 | } |
| 772 | |
| 773 | init_uobj(&obj->uobject, 0, file->ucontext, &xrcd_lock_class); |
| 774 | |
| 775 | down_write(&obj->uobject.mutex); |
| 776 | |
| 777 | if (!xrcd) { |
| 778 | xrcd = ib_dev->alloc_xrcd(ib_dev, file->ucontext, &udata); |
| 779 | if (IS_ERR(xrcd)) { |
| 780 | ret = PTR_ERR(xrcd); |
| 781 | goto err; |
| 782 | } |
| 783 | |
| 784 | xrcd->inode = inode; |
| 785 | xrcd->device = ib_dev; |
| 786 | atomic_set(&xrcd->usecnt, 0); |
| 787 | mutex_init(&xrcd->tgt_qp_mutex); |
| 788 | INIT_LIST_HEAD(&xrcd->tgt_qp_list); |
| 789 | new_xrcd = 1; |
| 790 | } |
| 791 | |
| 792 | atomic_set(&obj->refcnt, 0); |
| 793 | obj->uobject.object = xrcd; |
| 794 | ret = idr_add_uobj(&ib_uverbs_xrcd_idr, &obj->uobject); |
| 795 | if (ret) |
| 796 | goto err_idr; |
| 797 | |
| 798 | memset(&resp, 0, sizeof resp); |
| 799 | resp.xrcd_handle = obj->uobject.id; |
| 800 | |
| 801 | if (inode) { |
| 802 | if (new_xrcd) { |
| 803 | /* create new inode/xrcd table entry */ |
| 804 | ret = xrcd_table_insert(file->device, inode, xrcd); |
| 805 | if (ret) |
| 806 | goto err_insert_xrcd; |
| 807 | } |
| 808 | atomic_inc(&xrcd->usecnt); |
| 809 | } |
| 810 | |
| 811 | if (copy_to_user((void __user *) (unsigned long) cmd.response, |
| 812 | &resp, sizeof resp)) { |
| 813 | ret = -EFAULT; |
| 814 | goto err_copy; |
| 815 | } |
| 816 | |
| 817 | if (f.file) |
| 818 | fdput(f); |
| 819 | |
| 820 | mutex_lock(&file->mutex); |
| 821 | list_add_tail(&obj->uobject.list, &file->ucontext->xrcd_list); |
| 822 | mutex_unlock(&file->mutex); |
| 823 | |
| 824 | obj->uobject.live = 1; |
| 825 | up_write(&obj->uobject.mutex); |
| 826 | |
| 827 | mutex_unlock(&file->device->xrcd_tree_mutex); |
| 828 | return in_len; |
| 829 | |
| 830 | err_copy: |
| 831 | if (inode) { |
| 832 | if (new_xrcd) |
| 833 | xrcd_table_delete(file->device, inode); |
| 834 | atomic_dec(&xrcd->usecnt); |
| 835 | } |
| 836 | |
| 837 | err_insert_xrcd: |
| 838 | idr_remove_uobj(&ib_uverbs_xrcd_idr, &obj->uobject); |
| 839 | |
| 840 | err_idr: |
| 841 | ib_dealloc_xrcd(xrcd); |
| 842 | |
| 843 | err: |
| 844 | put_uobj_write(&obj->uobject); |
| 845 | |
| 846 | err_tree_mutex_unlock: |
| 847 | if (f.file) |
| 848 | fdput(f); |
| 849 | |
| 850 | mutex_unlock(&file->device->xrcd_tree_mutex); |
| 851 | |
| 852 | return ret; |
| 853 | } |
| 854 | |
| 855 | ssize_t ib_uverbs_close_xrcd(struct ib_uverbs_file *file, |
| 856 | struct ib_device *ib_dev, |
| 857 | const char __user *buf, int in_len, |
| 858 | int out_len) |
| 859 | { |
| 860 | struct ib_uverbs_close_xrcd cmd; |
| 861 | struct ib_uobject *uobj; |
| 862 | struct ib_xrcd *xrcd = NULL; |
| 863 | struct inode *inode = NULL; |
| 864 | struct ib_uxrcd_object *obj; |
| 865 | int live; |
| 866 | int ret = 0; |
| 867 | |
| 868 | if (copy_from_user(&cmd, buf, sizeof cmd)) |
| 869 | return -EFAULT; |
| 870 | |
| 871 | mutex_lock(&file->device->xrcd_tree_mutex); |
| 872 | uobj = idr_write_uobj(&ib_uverbs_xrcd_idr, cmd.xrcd_handle, file->ucontext); |
| 873 | if (!uobj) { |
| 874 | ret = -EINVAL; |
| 875 | goto out; |
| 876 | } |
| 877 | |
| 878 | xrcd = uobj->object; |
| 879 | inode = xrcd->inode; |
| 880 | obj = container_of(uobj, struct ib_uxrcd_object, uobject); |
| 881 | if (atomic_read(&obj->refcnt)) { |
| 882 | put_uobj_write(uobj); |
| 883 | ret = -EBUSY; |
| 884 | goto out; |
| 885 | } |
| 886 | |
| 887 | if (!inode || atomic_dec_and_test(&xrcd->usecnt)) { |
| 888 | ret = ib_dealloc_xrcd(uobj->object); |
| 889 | if (!ret) |
| 890 | uobj->live = 0; |
| 891 | } |
| 892 | |
| 893 | live = uobj->live; |
| 894 | if (inode && ret) |
| 895 | atomic_inc(&xrcd->usecnt); |
| 896 | |
| 897 | put_uobj_write(uobj); |
| 898 | |
| 899 | if (ret) |
| 900 | goto out; |
| 901 | |
| 902 | if (inode && !live) |
| 903 | xrcd_table_delete(file->device, inode); |
| 904 | |
| 905 | idr_remove_uobj(&ib_uverbs_xrcd_idr, uobj); |
| 906 | mutex_lock(&file->mutex); |
| 907 | list_del(&uobj->list); |
| 908 | mutex_unlock(&file->mutex); |
| 909 | |
| 910 | put_uobj(uobj); |
| 911 | ret = in_len; |
| 912 | |
| 913 | out: |
| 914 | mutex_unlock(&file->device->xrcd_tree_mutex); |
| 915 | return ret; |
| 916 | } |
| 917 | |
| 918 | void ib_uverbs_dealloc_xrcd(struct ib_uverbs_device *dev, |
| 919 | struct ib_xrcd *xrcd) |
| 920 | { |
| 921 | struct inode *inode; |
| 922 | |
| 923 | inode = xrcd->inode; |
| 924 | if (inode && !atomic_dec_and_test(&xrcd->usecnt)) |
| 925 | return; |
| 926 | |
| 927 | ib_dealloc_xrcd(xrcd); |
| 928 | |
| 929 | if (inode) |
| 930 | xrcd_table_delete(dev, inode); |
| 931 | } |
| 932 | |
| 933 | ssize_t ib_uverbs_reg_mr(struct ib_uverbs_file *file, |
| 934 | struct ib_device *ib_dev, |
| 935 | const char __user *buf, int in_len, |
| 936 | int out_len) |
| 937 | { |
| 938 | struct ib_uverbs_reg_mr cmd; |
| 939 | struct ib_uverbs_reg_mr_resp resp; |
| 940 | struct ib_udata udata; |
| 941 | struct ib_uobject *uobj; |
| 942 | struct ib_pd *pd; |
| 943 | struct ib_mr *mr; |
| 944 | int ret; |
| 945 | |
| 946 | if (out_len < sizeof resp) |
| 947 | return -ENOSPC; |
| 948 | |
| 949 | if (copy_from_user(&cmd, buf, sizeof cmd)) |
| 950 | return -EFAULT; |
| 951 | |
| 952 | INIT_UDATA(&udata, buf + sizeof cmd, |
| 953 | (unsigned long) cmd.response + sizeof resp, |
| 954 | in_len - sizeof cmd, out_len - sizeof resp); |
| 955 | |
| 956 | if ((cmd.start & ~PAGE_MASK) != (cmd.hca_va & ~PAGE_MASK)) |
| 957 | return -EINVAL; |
| 958 | |
| 959 | ret = ib_check_mr_access(cmd.access_flags); |
| 960 | if (ret) |
| 961 | return ret; |
| 962 | |
| 963 | uobj = kmalloc(sizeof *uobj, GFP_KERNEL); |
| 964 | if (!uobj) |
| 965 | return -ENOMEM; |
| 966 | |
| 967 | init_uobj(uobj, 0, file->ucontext, &mr_lock_class); |
| 968 | down_write(&uobj->mutex); |
| 969 | |
| 970 | pd = idr_read_pd(cmd.pd_handle, file->ucontext); |
| 971 | if (!pd) { |
| 972 | ret = -EINVAL; |
| 973 | goto err_free; |
| 974 | } |
| 975 | |
| 976 | if (cmd.access_flags & IB_ACCESS_ON_DEMAND) { |
| 977 | if (!(pd->device->attrs.device_cap_flags & |
| 978 | IB_DEVICE_ON_DEMAND_PAGING)) { |
| 979 | pr_debug("ODP support not available\n"); |
| 980 | ret = -EINVAL; |
| 981 | goto err_put; |
| 982 | } |
| 983 | } |
| 984 | |
| 985 | mr = pd->device->reg_user_mr(pd, cmd.start, cmd.length, cmd.hca_va, |
| 986 | cmd.access_flags, &udata); |
| 987 | if (IS_ERR(mr)) { |
| 988 | ret = PTR_ERR(mr); |
| 989 | goto err_put; |
| 990 | } |
| 991 | |
| 992 | mr->device = pd->device; |
| 993 | mr->pd = pd; |
| 994 | mr->uobject = uobj; |
| 995 | atomic_inc(&pd->usecnt); |
| 996 | |
| 997 | uobj->object = mr; |
| 998 | ret = idr_add_uobj(&ib_uverbs_mr_idr, uobj); |
| 999 | if (ret) |
| 1000 | goto err_unreg; |
| 1001 | |
| 1002 | memset(&resp, 0, sizeof resp); |
| 1003 | resp.lkey = mr->lkey; |
| 1004 | resp.rkey = mr->rkey; |
| 1005 | resp.mr_handle = uobj->id; |
| 1006 | |
| 1007 | if (copy_to_user((void __user *) (unsigned long) cmd.response, |
| 1008 | &resp, sizeof resp)) { |
| 1009 | ret = -EFAULT; |
| 1010 | goto err_copy; |
| 1011 | } |
| 1012 | |
| 1013 | put_pd_read(pd); |
| 1014 | |
| 1015 | mutex_lock(&file->mutex); |
| 1016 | list_add_tail(&uobj->list, &file->ucontext->mr_list); |
| 1017 | mutex_unlock(&file->mutex); |
| 1018 | |
| 1019 | uobj->live = 1; |
| 1020 | |
| 1021 | up_write(&uobj->mutex); |
| 1022 | |
| 1023 | return in_len; |
| 1024 | |
| 1025 | err_copy: |
| 1026 | idr_remove_uobj(&ib_uverbs_mr_idr, uobj); |
| 1027 | |
| 1028 | err_unreg: |
| 1029 | ib_dereg_mr(mr); |
| 1030 | |
| 1031 | err_put: |
| 1032 | put_pd_read(pd); |
| 1033 | |
| 1034 | err_free: |
| 1035 | put_uobj_write(uobj); |
| 1036 | return ret; |
| 1037 | } |
| 1038 | |
| 1039 | ssize_t ib_uverbs_rereg_mr(struct ib_uverbs_file *file, |
| 1040 | struct ib_device *ib_dev, |
| 1041 | const char __user *buf, int in_len, |
| 1042 | int out_len) |
| 1043 | { |
| 1044 | struct ib_uverbs_rereg_mr cmd; |
| 1045 | struct ib_uverbs_rereg_mr_resp resp; |
| 1046 | struct ib_udata udata; |
| 1047 | struct ib_pd *pd = NULL; |
| 1048 | struct ib_mr *mr; |
| 1049 | struct ib_pd *old_pd; |
| 1050 | int ret; |
| 1051 | struct ib_uobject *uobj; |
| 1052 | |
| 1053 | if (out_len < sizeof(resp)) |
| 1054 | return -ENOSPC; |
| 1055 | |
| 1056 | if (copy_from_user(&cmd, buf, sizeof(cmd))) |
| 1057 | return -EFAULT; |
| 1058 | |
| 1059 | INIT_UDATA(&udata, buf + sizeof(cmd), |
| 1060 | (unsigned long) cmd.response + sizeof(resp), |
| 1061 | in_len - sizeof(cmd), out_len - sizeof(resp)); |
| 1062 | |
| 1063 | if (cmd.flags & ~IB_MR_REREG_SUPPORTED || !cmd.flags) |
| 1064 | return -EINVAL; |
| 1065 | |
| 1066 | if ((cmd.flags & IB_MR_REREG_TRANS) && |
| 1067 | (!cmd.start || !cmd.hca_va || 0 >= cmd.length || |
| 1068 | (cmd.start & ~PAGE_MASK) != (cmd.hca_va & ~PAGE_MASK))) |
| 1069 | return -EINVAL; |
| 1070 | |
| 1071 | uobj = idr_write_uobj(&ib_uverbs_mr_idr, cmd.mr_handle, |
| 1072 | file->ucontext); |
| 1073 | |
| 1074 | if (!uobj) |
| 1075 | return -EINVAL; |
| 1076 | |
| 1077 | mr = uobj->object; |
| 1078 | |
| 1079 | if (cmd.flags & IB_MR_REREG_ACCESS) { |
| 1080 | ret = ib_check_mr_access(cmd.access_flags); |
| 1081 | if (ret) |
| 1082 | goto put_uobjs; |
| 1083 | } |
| 1084 | |
| 1085 | if (cmd.flags & IB_MR_REREG_PD) { |
| 1086 | pd = idr_read_pd(cmd.pd_handle, file->ucontext); |
| 1087 | if (!pd) { |
| 1088 | ret = -EINVAL; |
| 1089 | goto put_uobjs; |
| 1090 | } |
| 1091 | } |
| 1092 | |
| 1093 | old_pd = mr->pd; |
| 1094 | ret = mr->device->rereg_user_mr(mr, cmd.flags, cmd.start, |
| 1095 | cmd.length, cmd.hca_va, |
| 1096 | cmd.access_flags, pd, &udata); |
| 1097 | if (!ret) { |
| 1098 | if (cmd.flags & IB_MR_REREG_PD) { |
| 1099 | atomic_inc(&pd->usecnt); |
| 1100 | mr->pd = pd; |
| 1101 | atomic_dec(&old_pd->usecnt); |
| 1102 | } |
| 1103 | } else { |
| 1104 | goto put_uobj_pd; |
| 1105 | } |
| 1106 | |
| 1107 | memset(&resp, 0, sizeof(resp)); |
| 1108 | resp.lkey = mr->lkey; |
| 1109 | resp.rkey = mr->rkey; |
| 1110 | |
| 1111 | if (copy_to_user((void __user *)(unsigned long)cmd.response, |
| 1112 | &resp, sizeof(resp))) |
| 1113 | ret = -EFAULT; |
| 1114 | else |
| 1115 | ret = in_len; |
| 1116 | |
| 1117 | put_uobj_pd: |
| 1118 | if (cmd.flags & IB_MR_REREG_PD) |
| 1119 | put_pd_read(pd); |
| 1120 | |
| 1121 | put_uobjs: |
| 1122 | |
| 1123 | put_uobj_write(mr->uobject); |
| 1124 | |
| 1125 | return ret; |
| 1126 | } |
| 1127 | |
| 1128 | ssize_t ib_uverbs_dereg_mr(struct ib_uverbs_file *file, |
| 1129 | struct ib_device *ib_dev, |
| 1130 | const char __user *buf, int in_len, |
| 1131 | int out_len) |
| 1132 | { |
| 1133 | struct ib_uverbs_dereg_mr cmd; |
| 1134 | struct ib_mr *mr; |
| 1135 | struct ib_uobject *uobj; |
| 1136 | int ret = -EINVAL; |
| 1137 | |
| 1138 | if (copy_from_user(&cmd, buf, sizeof cmd)) |
| 1139 | return -EFAULT; |
| 1140 | |
| 1141 | uobj = idr_write_uobj(&ib_uverbs_mr_idr, cmd.mr_handle, file->ucontext); |
| 1142 | if (!uobj) |
| 1143 | return -EINVAL; |
| 1144 | |
| 1145 | mr = uobj->object; |
| 1146 | |
| 1147 | ret = ib_dereg_mr(mr); |
| 1148 | if (!ret) |
| 1149 | uobj->live = 0; |
| 1150 | |
| 1151 | put_uobj_write(uobj); |
| 1152 | |
| 1153 | if (ret) |
| 1154 | return ret; |
| 1155 | |
| 1156 | idr_remove_uobj(&ib_uverbs_mr_idr, uobj); |
| 1157 | |
| 1158 | mutex_lock(&file->mutex); |
| 1159 | list_del(&uobj->list); |
| 1160 | mutex_unlock(&file->mutex); |
| 1161 | |
| 1162 | put_uobj(uobj); |
| 1163 | |
| 1164 | return in_len; |
| 1165 | } |
| 1166 | |
| 1167 | ssize_t ib_uverbs_alloc_mw(struct ib_uverbs_file *file, |
| 1168 | struct ib_device *ib_dev, |
| 1169 | const char __user *buf, int in_len, |
| 1170 | int out_len) |
| 1171 | { |
| 1172 | struct ib_uverbs_alloc_mw cmd; |
| 1173 | struct ib_uverbs_alloc_mw_resp resp; |
| 1174 | struct ib_uobject *uobj; |
| 1175 | struct ib_pd *pd; |
| 1176 | struct ib_mw *mw; |
| 1177 | struct ib_udata udata; |
| 1178 | int ret; |
| 1179 | |
| 1180 | if (out_len < sizeof(resp)) |
| 1181 | return -ENOSPC; |
| 1182 | |
| 1183 | if (copy_from_user(&cmd, buf, sizeof(cmd))) |
| 1184 | return -EFAULT; |
| 1185 | |
| 1186 | uobj = kmalloc(sizeof(*uobj), GFP_KERNEL); |
| 1187 | if (!uobj) |
| 1188 | return -ENOMEM; |
| 1189 | |
| 1190 | init_uobj(uobj, 0, file->ucontext, &mw_lock_class); |
| 1191 | down_write(&uobj->mutex); |
| 1192 | |
| 1193 | pd = idr_read_pd(cmd.pd_handle, file->ucontext); |
| 1194 | if (!pd) { |
| 1195 | ret = -EINVAL; |
| 1196 | goto err_free; |
| 1197 | } |
| 1198 | |
| 1199 | INIT_UDATA(&udata, buf + sizeof(cmd), |
| 1200 | (unsigned long)cmd.response + sizeof(resp), |
| 1201 | in_len - sizeof(cmd) - sizeof(struct ib_uverbs_cmd_hdr), |
| 1202 | out_len - sizeof(resp)); |
| 1203 | |
| 1204 | mw = pd->device->alloc_mw(pd, cmd.mw_type, &udata); |
| 1205 | if (IS_ERR(mw)) { |
| 1206 | ret = PTR_ERR(mw); |
| 1207 | goto err_put; |
| 1208 | } |
| 1209 | |
| 1210 | mw->device = pd->device; |
| 1211 | mw->pd = pd; |
| 1212 | mw->uobject = uobj; |
| 1213 | atomic_inc(&pd->usecnt); |
| 1214 | |
| 1215 | uobj->object = mw; |
| 1216 | ret = idr_add_uobj(&ib_uverbs_mw_idr, uobj); |
| 1217 | if (ret) |
| 1218 | goto err_unalloc; |
| 1219 | |
| 1220 | memset(&resp, 0, sizeof(resp)); |
| 1221 | resp.rkey = mw->rkey; |
| 1222 | resp.mw_handle = uobj->id; |
| 1223 | |
| 1224 | if (copy_to_user((void __user *)(unsigned long)cmd.response, |
| 1225 | &resp, sizeof(resp))) { |
| 1226 | ret = -EFAULT; |
| 1227 | goto err_copy; |
| 1228 | } |
| 1229 | |
| 1230 | put_pd_read(pd); |
| 1231 | |
| 1232 | mutex_lock(&file->mutex); |
| 1233 | list_add_tail(&uobj->list, &file->ucontext->mw_list); |
| 1234 | mutex_unlock(&file->mutex); |
| 1235 | |
| 1236 | uobj->live = 1; |
| 1237 | |
| 1238 | up_write(&uobj->mutex); |
| 1239 | |
| 1240 | return in_len; |
| 1241 | |
| 1242 | err_copy: |
| 1243 | idr_remove_uobj(&ib_uverbs_mw_idr, uobj); |
| 1244 | |
| 1245 | err_unalloc: |
| 1246 | uverbs_dealloc_mw(mw); |
| 1247 | |
| 1248 | err_put: |
| 1249 | put_pd_read(pd); |
| 1250 | |
| 1251 | err_free: |
| 1252 | put_uobj_write(uobj); |
| 1253 | return ret; |
| 1254 | } |
| 1255 | |
| 1256 | ssize_t ib_uverbs_dealloc_mw(struct ib_uverbs_file *file, |
| 1257 | struct ib_device *ib_dev, |
| 1258 | const char __user *buf, int in_len, |
| 1259 | int out_len) |
| 1260 | { |
| 1261 | struct ib_uverbs_dealloc_mw cmd; |
| 1262 | struct ib_mw *mw; |
| 1263 | struct ib_uobject *uobj; |
| 1264 | int ret = -EINVAL; |
| 1265 | |
| 1266 | if (copy_from_user(&cmd, buf, sizeof(cmd))) |
| 1267 | return -EFAULT; |
| 1268 | |
| 1269 | uobj = idr_write_uobj(&ib_uverbs_mw_idr, cmd.mw_handle, file->ucontext); |
| 1270 | if (!uobj) |
| 1271 | return -EINVAL; |
| 1272 | |
| 1273 | mw = uobj->object; |
| 1274 | |
| 1275 | ret = uverbs_dealloc_mw(mw); |
| 1276 | if (!ret) |
| 1277 | uobj->live = 0; |
| 1278 | |
| 1279 | put_uobj_write(uobj); |
| 1280 | |
| 1281 | if (ret) |
| 1282 | return ret; |
| 1283 | |
| 1284 | idr_remove_uobj(&ib_uverbs_mw_idr, uobj); |
| 1285 | |
| 1286 | mutex_lock(&file->mutex); |
| 1287 | list_del(&uobj->list); |
| 1288 | mutex_unlock(&file->mutex); |
| 1289 | |
| 1290 | put_uobj(uobj); |
| 1291 | |
| 1292 | return in_len; |
| 1293 | } |
| 1294 | |
| 1295 | ssize_t ib_uverbs_create_comp_channel(struct ib_uverbs_file *file, |
| 1296 | struct ib_device *ib_dev, |
| 1297 | const char __user *buf, int in_len, |
| 1298 | int out_len) |
| 1299 | { |
| 1300 | struct ib_uverbs_create_comp_channel cmd; |
| 1301 | struct ib_uverbs_create_comp_channel_resp resp; |
| 1302 | struct file *filp; |
| 1303 | int ret; |
| 1304 | |
| 1305 | if (out_len < sizeof resp) |
| 1306 | return -ENOSPC; |
| 1307 | |
| 1308 | if (copy_from_user(&cmd, buf, sizeof cmd)) |
| 1309 | return -EFAULT; |
| 1310 | |
| 1311 | ret = get_unused_fd_flags(O_CLOEXEC); |
| 1312 | if (ret < 0) |
| 1313 | return ret; |
| 1314 | resp.fd = ret; |
| 1315 | |
| 1316 | filp = ib_uverbs_alloc_event_file(file, ib_dev, 0); |
| 1317 | if (IS_ERR(filp)) { |
| 1318 | put_unused_fd(resp.fd); |
| 1319 | return PTR_ERR(filp); |
| 1320 | } |
| 1321 | |
| 1322 | if (copy_to_user((void __user *) (unsigned long) cmd.response, |
| 1323 | &resp, sizeof resp)) { |
| 1324 | put_unused_fd(resp.fd); |
| 1325 | fput(filp); |
| 1326 | return -EFAULT; |
| 1327 | } |
| 1328 | |
| 1329 | fd_install(resp.fd, filp); |
| 1330 | return in_len; |
| 1331 | } |
| 1332 | |
| 1333 | static struct ib_ucq_object *create_cq(struct ib_uverbs_file *file, |
| 1334 | struct ib_device *ib_dev, |
| 1335 | struct ib_udata *ucore, |
| 1336 | struct ib_udata *uhw, |
| 1337 | struct ib_uverbs_ex_create_cq *cmd, |
| 1338 | size_t cmd_sz, |
| 1339 | int (*cb)(struct ib_uverbs_file *file, |
| 1340 | struct ib_ucq_object *obj, |
| 1341 | struct ib_uverbs_ex_create_cq_resp *resp, |
| 1342 | struct ib_udata *udata, |
| 1343 | void *context), |
| 1344 | void *context) |
| 1345 | { |
| 1346 | struct ib_ucq_object *obj; |
| 1347 | struct ib_uverbs_event_file *ev_file = NULL; |
| 1348 | struct ib_cq *cq; |
| 1349 | int ret; |
| 1350 | struct ib_uverbs_ex_create_cq_resp resp; |
| 1351 | struct ib_cq_init_attr attr = {}; |
| 1352 | |
| 1353 | if (cmd->comp_vector >= file->device->num_comp_vectors) |
| 1354 | return ERR_PTR(-EINVAL); |
| 1355 | |
| 1356 | obj = kmalloc(sizeof *obj, GFP_KERNEL); |
| 1357 | if (!obj) |
| 1358 | return ERR_PTR(-ENOMEM); |
| 1359 | |
| 1360 | init_uobj(&obj->uobject, cmd->user_handle, file->ucontext, &cq_lock_class); |
| 1361 | down_write(&obj->uobject.mutex); |
| 1362 | |
| 1363 | if (cmd->comp_channel >= 0) { |
| 1364 | ev_file = ib_uverbs_lookup_comp_file(cmd->comp_channel); |
| 1365 | if (!ev_file) { |
| 1366 | ret = -EINVAL; |
| 1367 | goto err; |
| 1368 | } |
| 1369 | } |
| 1370 | |
| 1371 | obj->uverbs_file = file; |
| 1372 | obj->comp_events_reported = 0; |
| 1373 | obj->async_events_reported = 0; |
| 1374 | INIT_LIST_HEAD(&obj->comp_list); |
| 1375 | INIT_LIST_HEAD(&obj->async_list); |
| 1376 | |
| 1377 | attr.cqe = cmd->cqe; |
| 1378 | attr.comp_vector = cmd->comp_vector; |
| 1379 | |
| 1380 | if (cmd_sz > offsetof(typeof(*cmd), flags) + sizeof(cmd->flags)) |
| 1381 | attr.flags = cmd->flags; |
| 1382 | |
| 1383 | cq = ib_dev->create_cq(ib_dev, &attr, |
| 1384 | file->ucontext, uhw); |
| 1385 | if (IS_ERR(cq)) { |
| 1386 | ret = PTR_ERR(cq); |
| 1387 | goto err_file; |
| 1388 | } |
| 1389 | |
| 1390 | cq->device = ib_dev; |
| 1391 | cq->uobject = &obj->uobject; |
| 1392 | cq->comp_handler = ib_uverbs_comp_handler; |
| 1393 | cq->event_handler = ib_uverbs_cq_event_handler; |
| 1394 | cq->cq_context = ev_file; |
| 1395 | atomic_set(&cq->usecnt, 0); |
| 1396 | |
| 1397 | obj->uobject.object = cq; |
| 1398 | ret = idr_add_uobj(&ib_uverbs_cq_idr, &obj->uobject); |
| 1399 | if (ret) |
| 1400 | goto err_free; |
| 1401 | |
| 1402 | memset(&resp, 0, sizeof resp); |
| 1403 | resp.base.cq_handle = obj->uobject.id; |
| 1404 | resp.base.cqe = cq->cqe; |
| 1405 | |
| 1406 | resp.response_length = offsetof(typeof(resp), response_length) + |
| 1407 | sizeof(resp.response_length); |
| 1408 | |
| 1409 | ret = cb(file, obj, &resp, ucore, context); |
| 1410 | if (ret) |
| 1411 | goto err_cb; |
| 1412 | |
| 1413 | mutex_lock(&file->mutex); |
| 1414 | list_add_tail(&obj->uobject.list, &file->ucontext->cq_list); |
| 1415 | mutex_unlock(&file->mutex); |
| 1416 | |
| 1417 | obj->uobject.live = 1; |
| 1418 | |
| 1419 | up_write(&obj->uobject.mutex); |
| 1420 | |
| 1421 | return obj; |
| 1422 | |
| 1423 | err_cb: |
| 1424 | idr_remove_uobj(&ib_uverbs_cq_idr, &obj->uobject); |
| 1425 | |
| 1426 | err_free: |
| 1427 | ib_destroy_cq(cq); |
| 1428 | |
| 1429 | err_file: |
| 1430 | if (ev_file) |
| 1431 | ib_uverbs_release_ucq(file, ev_file, obj); |
| 1432 | |
| 1433 | err: |
| 1434 | put_uobj_write(&obj->uobject); |
| 1435 | |
| 1436 | return ERR_PTR(ret); |
| 1437 | } |
| 1438 | |
| 1439 | static int ib_uverbs_create_cq_cb(struct ib_uverbs_file *file, |
| 1440 | struct ib_ucq_object *obj, |
| 1441 | struct ib_uverbs_ex_create_cq_resp *resp, |
| 1442 | struct ib_udata *ucore, void *context) |
| 1443 | { |
| 1444 | if (ib_copy_to_udata(ucore, &resp->base, sizeof(resp->base))) |
| 1445 | return -EFAULT; |
| 1446 | |
| 1447 | return 0; |
| 1448 | } |
| 1449 | |
| 1450 | ssize_t ib_uverbs_create_cq(struct ib_uverbs_file *file, |
| 1451 | struct ib_device *ib_dev, |
| 1452 | const char __user *buf, int in_len, |
| 1453 | int out_len) |
| 1454 | { |
| 1455 | struct ib_uverbs_create_cq cmd; |
| 1456 | struct ib_uverbs_ex_create_cq cmd_ex; |
| 1457 | struct ib_uverbs_create_cq_resp resp; |
| 1458 | struct ib_udata ucore; |
| 1459 | struct ib_udata uhw; |
| 1460 | struct ib_ucq_object *obj; |
| 1461 | |
| 1462 | if (out_len < sizeof(resp)) |
| 1463 | return -ENOSPC; |
| 1464 | |
| 1465 | if (copy_from_user(&cmd, buf, sizeof(cmd))) |
| 1466 | return -EFAULT; |
| 1467 | |
| 1468 | INIT_UDATA(&ucore, buf, (unsigned long)cmd.response, sizeof(cmd), sizeof(resp)); |
| 1469 | |
| 1470 | INIT_UDATA(&uhw, buf + sizeof(cmd), |
| 1471 | (unsigned long)cmd.response + sizeof(resp), |
| 1472 | in_len - sizeof(cmd), out_len - sizeof(resp)); |
| 1473 | |
| 1474 | memset(&cmd_ex, 0, sizeof(cmd_ex)); |
| 1475 | cmd_ex.user_handle = cmd.user_handle; |
| 1476 | cmd_ex.cqe = cmd.cqe; |
| 1477 | cmd_ex.comp_vector = cmd.comp_vector; |
| 1478 | cmd_ex.comp_channel = cmd.comp_channel; |
| 1479 | |
| 1480 | obj = create_cq(file, ib_dev, &ucore, &uhw, &cmd_ex, |
| 1481 | offsetof(typeof(cmd_ex), comp_channel) + |
| 1482 | sizeof(cmd.comp_channel), ib_uverbs_create_cq_cb, |
| 1483 | NULL); |
| 1484 | |
| 1485 | if (IS_ERR(obj)) |
| 1486 | return PTR_ERR(obj); |
| 1487 | |
| 1488 | return in_len; |
| 1489 | } |
| 1490 | |
| 1491 | static int ib_uverbs_ex_create_cq_cb(struct ib_uverbs_file *file, |
| 1492 | struct ib_ucq_object *obj, |
| 1493 | struct ib_uverbs_ex_create_cq_resp *resp, |
| 1494 | struct ib_udata *ucore, void *context) |
| 1495 | { |
| 1496 | if (ib_copy_to_udata(ucore, resp, resp->response_length)) |
| 1497 | return -EFAULT; |
| 1498 | |
| 1499 | return 0; |
| 1500 | } |
| 1501 | |
| 1502 | int ib_uverbs_ex_create_cq(struct ib_uverbs_file *file, |
| 1503 | struct ib_device *ib_dev, |
| 1504 | struct ib_udata *ucore, |
| 1505 | struct ib_udata *uhw) |
| 1506 | { |
| 1507 | struct ib_uverbs_ex_create_cq_resp resp; |
| 1508 | struct ib_uverbs_ex_create_cq cmd; |
| 1509 | struct ib_ucq_object *obj; |
| 1510 | int err; |
| 1511 | |
| 1512 | if (ucore->inlen < sizeof(cmd)) |
| 1513 | return -EINVAL; |
| 1514 | |
| 1515 | err = ib_copy_from_udata(&cmd, ucore, sizeof(cmd)); |
| 1516 | if (err) |
| 1517 | return err; |
| 1518 | |
| 1519 | if (cmd.comp_mask) |
| 1520 | return -EINVAL; |
| 1521 | |
| 1522 | if (cmd.reserved) |
| 1523 | return -EINVAL; |
| 1524 | |
| 1525 | if (ucore->outlen < (offsetof(typeof(resp), response_length) + |
| 1526 | sizeof(resp.response_length))) |
| 1527 | return -ENOSPC; |
| 1528 | |
| 1529 | obj = create_cq(file, ib_dev, ucore, uhw, &cmd, |
| 1530 | min(ucore->inlen, sizeof(cmd)), |
| 1531 | ib_uverbs_ex_create_cq_cb, NULL); |
| 1532 | |
| 1533 | if (IS_ERR(obj)) |
| 1534 | return PTR_ERR(obj); |
| 1535 | |
| 1536 | return 0; |
| 1537 | } |
| 1538 | |
| 1539 | ssize_t ib_uverbs_resize_cq(struct ib_uverbs_file *file, |
| 1540 | struct ib_device *ib_dev, |
| 1541 | const char __user *buf, int in_len, |
| 1542 | int out_len) |
| 1543 | { |
| 1544 | struct ib_uverbs_resize_cq cmd; |
| 1545 | struct ib_uverbs_resize_cq_resp resp; |
| 1546 | struct ib_udata udata; |
| 1547 | struct ib_cq *cq; |
| 1548 | int ret = -EINVAL; |
| 1549 | |
| 1550 | if (copy_from_user(&cmd, buf, sizeof cmd)) |
| 1551 | return -EFAULT; |
| 1552 | |
| 1553 | INIT_UDATA(&udata, buf + sizeof cmd, |
| 1554 | (unsigned long) cmd.response + sizeof resp, |
| 1555 | in_len - sizeof cmd, out_len - sizeof resp); |
| 1556 | |
| 1557 | cq = idr_read_cq(cmd.cq_handle, file->ucontext, 0); |
| 1558 | if (!cq) |
| 1559 | return -EINVAL; |
| 1560 | |
| 1561 | ret = cq->device->resize_cq(cq, cmd.cqe, &udata); |
| 1562 | if (ret) |
| 1563 | goto out; |
| 1564 | |
| 1565 | resp.cqe = cq->cqe; |
| 1566 | |
| 1567 | if (copy_to_user((void __user *) (unsigned long) cmd.response, |
| 1568 | &resp, sizeof resp.cqe)) |
| 1569 | ret = -EFAULT; |
| 1570 | |
| 1571 | out: |
| 1572 | put_cq_read(cq); |
| 1573 | |
| 1574 | return ret ? ret : in_len; |
| 1575 | } |
| 1576 | |
| 1577 | static int copy_wc_to_user(void __user *dest, struct ib_wc *wc) |
| 1578 | { |
| 1579 | struct ib_uverbs_wc tmp; |
| 1580 | |
| 1581 | tmp.wr_id = wc->wr_id; |
| 1582 | tmp.status = wc->status; |
| 1583 | tmp.opcode = wc->opcode; |
| 1584 | tmp.vendor_err = wc->vendor_err; |
| 1585 | tmp.byte_len = wc->byte_len; |
| 1586 | tmp.ex.imm_data = (__u32 __force) wc->ex.imm_data; |
| 1587 | tmp.qp_num = wc->qp->qp_num; |
| 1588 | tmp.src_qp = wc->src_qp; |
| 1589 | tmp.wc_flags = wc->wc_flags; |
| 1590 | tmp.pkey_index = wc->pkey_index; |
| 1591 | tmp.slid = wc->slid; |
| 1592 | tmp.sl = wc->sl; |
| 1593 | tmp.dlid_path_bits = wc->dlid_path_bits; |
| 1594 | tmp.port_num = wc->port_num; |
| 1595 | tmp.reserved = 0; |
| 1596 | |
| 1597 | if (copy_to_user(dest, &tmp, sizeof tmp)) |
| 1598 | return -EFAULT; |
| 1599 | |
| 1600 | return 0; |
| 1601 | } |
| 1602 | |
| 1603 | ssize_t ib_uverbs_poll_cq(struct ib_uverbs_file *file, |
| 1604 | struct ib_device *ib_dev, |
| 1605 | const char __user *buf, int in_len, |
| 1606 | int out_len) |
| 1607 | { |
| 1608 | struct ib_uverbs_poll_cq cmd; |
| 1609 | struct ib_uverbs_poll_cq_resp resp; |
| 1610 | u8 __user *header_ptr; |
| 1611 | u8 __user *data_ptr; |
| 1612 | struct ib_cq *cq; |
| 1613 | struct ib_wc wc; |
| 1614 | int ret; |
| 1615 | |
| 1616 | if (copy_from_user(&cmd, buf, sizeof cmd)) |
| 1617 | return -EFAULT; |
| 1618 | |
| 1619 | cq = idr_read_cq(cmd.cq_handle, file->ucontext, 0); |
| 1620 | if (!cq) |
| 1621 | return -EINVAL; |
| 1622 | |
| 1623 | /* we copy a struct ib_uverbs_poll_cq_resp to user space */ |
| 1624 | header_ptr = (void __user *)(unsigned long) cmd.response; |
| 1625 | data_ptr = header_ptr + sizeof resp; |
| 1626 | |
| 1627 | memset(&resp, 0, sizeof resp); |
| 1628 | while (resp.count < cmd.ne) { |
| 1629 | ret = ib_poll_cq(cq, 1, &wc); |
| 1630 | if (ret < 0) |
| 1631 | goto out_put; |
| 1632 | if (!ret) |
| 1633 | break; |
| 1634 | |
| 1635 | ret = copy_wc_to_user(data_ptr, &wc); |
| 1636 | if (ret) |
| 1637 | goto out_put; |
| 1638 | |
| 1639 | data_ptr += sizeof(struct ib_uverbs_wc); |
| 1640 | ++resp.count; |
| 1641 | } |
| 1642 | |
| 1643 | if (copy_to_user(header_ptr, &resp, sizeof resp)) { |
| 1644 | ret = -EFAULT; |
| 1645 | goto out_put; |
| 1646 | } |
| 1647 | |
| 1648 | ret = in_len; |
| 1649 | |
| 1650 | out_put: |
| 1651 | put_cq_read(cq); |
| 1652 | return ret; |
| 1653 | } |
| 1654 | |
| 1655 | ssize_t ib_uverbs_req_notify_cq(struct ib_uverbs_file *file, |
| 1656 | struct ib_device *ib_dev, |
| 1657 | const char __user *buf, int in_len, |
| 1658 | int out_len) |
| 1659 | { |
| 1660 | struct ib_uverbs_req_notify_cq cmd; |
| 1661 | struct ib_cq *cq; |
| 1662 | |
| 1663 | if (copy_from_user(&cmd, buf, sizeof cmd)) |
| 1664 | return -EFAULT; |
| 1665 | |
| 1666 | cq = idr_read_cq(cmd.cq_handle, file->ucontext, 0); |
| 1667 | if (!cq) |
| 1668 | return -EINVAL; |
| 1669 | |
| 1670 | ib_req_notify_cq(cq, cmd.solicited_only ? |
| 1671 | IB_CQ_SOLICITED : IB_CQ_NEXT_COMP); |
| 1672 | |
| 1673 | put_cq_read(cq); |
| 1674 | |
| 1675 | return in_len; |
| 1676 | } |
| 1677 | |
| 1678 | ssize_t ib_uverbs_destroy_cq(struct ib_uverbs_file *file, |
| 1679 | struct ib_device *ib_dev, |
| 1680 | const char __user *buf, int in_len, |
| 1681 | int out_len) |
| 1682 | { |
| 1683 | struct ib_uverbs_destroy_cq cmd; |
| 1684 | struct ib_uverbs_destroy_cq_resp resp; |
| 1685 | struct ib_uobject *uobj; |
| 1686 | struct ib_cq *cq; |
| 1687 | struct ib_ucq_object *obj; |
| 1688 | struct ib_uverbs_event_file *ev_file; |
| 1689 | int ret = -EINVAL; |
| 1690 | |
| 1691 | if (copy_from_user(&cmd, buf, sizeof cmd)) |
| 1692 | return -EFAULT; |
| 1693 | |
| 1694 | uobj = idr_write_uobj(&ib_uverbs_cq_idr, cmd.cq_handle, file->ucontext); |
| 1695 | if (!uobj) |
| 1696 | return -EINVAL; |
| 1697 | cq = uobj->object; |
| 1698 | ev_file = cq->cq_context; |
| 1699 | obj = container_of(cq->uobject, struct ib_ucq_object, uobject); |
| 1700 | |
| 1701 | ret = ib_destroy_cq(cq); |
| 1702 | if (!ret) |
| 1703 | uobj->live = 0; |
| 1704 | |
| 1705 | put_uobj_write(uobj); |
| 1706 | |
| 1707 | if (ret) |
| 1708 | return ret; |
| 1709 | |
| 1710 | idr_remove_uobj(&ib_uverbs_cq_idr, uobj); |
| 1711 | |
| 1712 | mutex_lock(&file->mutex); |
| 1713 | list_del(&uobj->list); |
| 1714 | mutex_unlock(&file->mutex); |
| 1715 | |
| 1716 | ib_uverbs_release_ucq(file, ev_file, obj); |
| 1717 | |
| 1718 | memset(&resp, 0, sizeof resp); |
| 1719 | resp.comp_events_reported = obj->comp_events_reported; |
| 1720 | resp.async_events_reported = obj->async_events_reported; |
| 1721 | |
| 1722 | put_uobj(uobj); |
| 1723 | |
| 1724 | if (copy_to_user((void __user *) (unsigned long) cmd.response, |
| 1725 | &resp, sizeof resp)) |
| 1726 | return -EFAULT; |
| 1727 | |
| 1728 | return in_len; |
| 1729 | } |
| 1730 | |
| 1731 | static int create_qp(struct ib_uverbs_file *file, |
| 1732 | struct ib_udata *ucore, |
| 1733 | struct ib_udata *uhw, |
| 1734 | struct ib_uverbs_ex_create_qp *cmd, |
| 1735 | size_t cmd_sz, |
| 1736 | int (*cb)(struct ib_uverbs_file *file, |
| 1737 | struct ib_uverbs_ex_create_qp_resp *resp, |
| 1738 | struct ib_udata *udata), |
| 1739 | void *context) |
| 1740 | { |
| 1741 | struct ib_uqp_object *obj; |
| 1742 | struct ib_device *device; |
| 1743 | struct ib_pd *pd = NULL; |
| 1744 | struct ib_xrcd *xrcd = NULL; |
| 1745 | struct ib_uobject *uninitialized_var(xrcd_uobj); |
| 1746 | struct ib_cq *scq = NULL, *rcq = NULL; |
| 1747 | struct ib_srq *srq = NULL; |
| 1748 | struct ib_qp *qp; |
| 1749 | char *buf; |
| 1750 | struct ib_qp_init_attr attr = {}; |
| 1751 | struct ib_uverbs_ex_create_qp_resp resp; |
| 1752 | int ret; |
| 1753 | |
| 1754 | if (cmd->qp_type == IB_QPT_RAW_PACKET && !capable(CAP_NET_RAW)) |
| 1755 | return -EPERM; |
| 1756 | |
| 1757 | obj = kzalloc(sizeof *obj, GFP_KERNEL); |
| 1758 | if (!obj) |
| 1759 | return -ENOMEM; |
| 1760 | |
| 1761 | init_uobj(&obj->uevent.uobject, cmd->user_handle, file->ucontext, |
| 1762 | &qp_lock_class); |
| 1763 | down_write(&obj->uevent.uobject.mutex); |
| 1764 | |
| 1765 | if (cmd->qp_type == IB_QPT_XRC_TGT) { |
| 1766 | xrcd = idr_read_xrcd(cmd->pd_handle, file->ucontext, |
| 1767 | &xrcd_uobj); |
| 1768 | if (!xrcd) { |
| 1769 | ret = -EINVAL; |
| 1770 | goto err_put; |
| 1771 | } |
| 1772 | device = xrcd->device; |
| 1773 | } else { |
| 1774 | if (cmd->qp_type == IB_QPT_XRC_INI) { |
| 1775 | cmd->max_recv_wr = 0; |
| 1776 | cmd->max_recv_sge = 0; |
| 1777 | } else { |
| 1778 | if (cmd->is_srq) { |
| 1779 | srq = idr_read_srq(cmd->srq_handle, |
| 1780 | file->ucontext); |
| 1781 | if (!srq || srq->srq_type != IB_SRQT_BASIC) { |
| 1782 | ret = -EINVAL; |
| 1783 | goto err_put; |
| 1784 | } |
| 1785 | } |
| 1786 | |
| 1787 | if (cmd->recv_cq_handle != cmd->send_cq_handle) { |
| 1788 | rcq = idr_read_cq(cmd->recv_cq_handle, |
| 1789 | file->ucontext, 0); |
| 1790 | if (!rcq) { |
| 1791 | ret = -EINVAL; |
| 1792 | goto err_put; |
| 1793 | } |
| 1794 | } |
| 1795 | } |
| 1796 | |
| 1797 | scq = idr_read_cq(cmd->send_cq_handle, file->ucontext, !!rcq); |
| 1798 | rcq = rcq ?: scq; |
| 1799 | pd = idr_read_pd(cmd->pd_handle, file->ucontext); |
| 1800 | if (!pd || !scq) { |
| 1801 | ret = -EINVAL; |
| 1802 | goto err_put; |
| 1803 | } |
| 1804 | |
| 1805 | device = pd->device; |
| 1806 | } |
| 1807 | |
| 1808 | attr.event_handler = ib_uverbs_qp_event_handler; |
| 1809 | attr.qp_context = file; |
| 1810 | attr.send_cq = scq; |
| 1811 | attr.recv_cq = rcq; |
| 1812 | attr.srq = srq; |
| 1813 | attr.xrcd = xrcd; |
| 1814 | attr.sq_sig_type = cmd->sq_sig_all ? IB_SIGNAL_ALL_WR : |
| 1815 | IB_SIGNAL_REQ_WR; |
| 1816 | attr.qp_type = cmd->qp_type; |
| 1817 | attr.create_flags = 0; |
| 1818 | |
| 1819 | attr.cap.max_send_wr = cmd->max_send_wr; |
| 1820 | attr.cap.max_recv_wr = cmd->max_recv_wr; |
| 1821 | attr.cap.max_send_sge = cmd->max_send_sge; |
| 1822 | attr.cap.max_recv_sge = cmd->max_recv_sge; |
| 1823 | attr.cap.max_inline_data = cmd->max_inline_data; |
| 1824 | |
| 1825 | obj->uevent.events_reported = 0; |
| 1826 | INIT_LIST_HEAD(&obj->uevent.event_list); |
| 1827 | INIT_LIST_HEAD(&obj->mcast_list); |
| 1828 | |
| 1829 | if (cmd_sz >= offsetof(typeof(*cmd), create_flags) + |
| 1830 | sizeof(cmd->create_flags)) |
| 1831 | attr.create_flags = cmd->create_flags; |
| 1832 | |
| 1833 | if (attr.create_flags & ~(IB_QP_CREATE_BLOCK_MULTICAST_LOOPBACK | |
| 1834 | IB_QP_CREATE_CROSS_CHANNEL | |
| 1835 | IB_QP_CREATE_MANAGED_SEND | |
| 1836 | IB_QP_CREATE_MANAGED_RECV | |
| 1837 | IB_QP_CREATE_SCATTER_FCS)) { |
| 1838 | ret = -EINVAL; |
| 1839 | goto err_put; |
| 1840 | } |
| 1841 | |
| 1842 | buf = (void *)cmd + sizeof(*cmd); |
| 1843 | if (cmd_sz > sizeof(*cmd)) |
| 1844 | if (!(buf[0] == 0 && !memcmp(buf, buf + 1, |
| 1845 | cmd_sz - sizeof(*cmd) - 1))) { |
| 1846 | ret = -EINVAL; |
| 1847 | goto err_put; |
| 1848 | } |
| 1849 | |
| 1850 | if (cmd->qp_type == IB_QPT_XRC_TGT) |
| 1851 | qp = ib_create_qp(pd, &attr); |
| 1852 | else |
| 1853 | qp = device->create_qp(pd, &attr, uhw); |
| 1854 | |
| 1855 | if (IS_ERR(qp)) { |
| 1856 | ret = PTR_ERR(qp); |
| 1857 | goto err_put; |
| 1858 | } |
| 1859 | |
| 1860 | if (cmd->qp_type != IB_QPT_XRC_TGT) { |
| 1861 | qp->real_qp = qp; |
| 1862 | qp->device = device; |
| 1863 | qp->pd = pd; |
| 1864 | qp->send_cq = attr.send_cq; |
| 1865 | qp->recv_cq = attr.recv_cq; |
| 1866 | qp->srq = attr.srq; |
| 1867 | qp->event_handler = attr.event_handler; |
| 1868 | qp->qp_context = attr.qp_context; |
| 1869 | qp->qp_type = attr.qp_type; |
| 1870 | atomic_set(&qp->usecnt, 0); |
| 1871 | atomic_inc(&pd->usecnt); |
| 1872 | atomic_inc(&attr.send_cq->usecnt); |
| 1873 | if (attr.recv_cq) |
| 1874 | atomic_inc(&attr.recv_cq->usecnt); |
| 1875 | if (attr.srq) |
| 1876 | atomic_inc(&attr.srq->usecnt); |
| 1877 | } |
| 1878 | qp->uobject = &obj->uevent.uobject; |
| 1879 | |
| 1880 | obj->uevent.uobject.object = qp; |
| 1881 | ret = idr_add_uobj(&ib_uverbs_qp_idr, &obj->uevent.uobject); |
| 1882 | if (ret) |
| 1883 | goto err_destroy; |
| 1884 | |
| 1885 | memset(&resp, 0, sizeof resp); |
| 1886 | resp.base.qpn = qp->qp_num; |
| 1887 | resp.base.qp_handle = obj->uevent.uobject.id; |
| 1888 | resp.base.max_recv_sge = attr.cap.max_recv_sge; |
| 1889 | resp.base.max_send_sge = attr.cap.max_send_sge; |
| 1890 | resp.base.max_recv_wr = attr.cap.max_recv_wr; |
| 1891 | resp.base.max_send_wr = attr.cap.max_send_wr; |
| 1892 | resp.base.max_inline_data = attr.cap.max_inline_data; |
| 1893 | |
| 1894 | resp.response_length = offsetof(typeof(resp), response_length) + |
| 1895 | sizeof(resp.response_length); |
| 1896 | |
| 1897 | ret = cb(file, &resp, ucore); |
| 1898 | if (ret) |
| 1899 | goto err_cb; |
| 1900 | |
| 1901 | if (xrcd) { |
| 1902 | obj->uxrcd = container_of(xrcd_uobj, struct ib_uxrcd_object, |
| 1903 | uobject); |
| 1904 | atomic_inc(&obj->uxrcd->refcnt); |
| 1905 | put_xrcd_read(xrcd_uobj); |
| 1906 | } |
| 1907 | |
| 1908 | if (pd) |
| 1909 | put_pd_read(pd); |
| 1910 | if (scq) |
| 1911 | put_cq_read(scq); |
| 1912 | if (rcq && rcq != scq) |
| 1913 | put_cq_read(rcq); |
| 1914 | if (srq) |
| 1915 | put_srq_read(srq); |
| 1916 | |
| 1917 | mutex_lock(&file->mutex); |
| 1918 | list_add_tail(&obj->uevent.uobject.list, &file->ucontext->qp_list); |
| 1919 | mutex_unlock(&file->mutex); |
| 1920 | |
| 1921 | obj->uevent.uobject.live = 1; |
| 1922 | |
| 1923 | up_write(&obj->uevent.uobject.mutex); |
| 1924 | |
| 1925 | return 0; |
| 1926 | err_cb: |
| 1927 | idr_remove_uobj(&ib_uverbs_qp_idr, &obj->uevent.uobject); |
| 1928 | |
| 1929 | err_destroy: |
| 1930 | ib_destroy_qp(qp); |
| 1931 | |
| 1932 | err_put: |
| 1933 | if (xrcd) |
| 1934 | put_xrcd_read(xrcd_uobj); |
| 1935 | if (pd) |
| 1936 | put_pd_read(pd); |
| 1937 | if (scq) |
| 1938 | put_cq_read(scq); |
| 1939 | if (rcq && rcq != scq) |
| 1940 | put_cq_read(rcq); |
| 1941 | if (srq) |
| 1942 | put_srq_read(srq); |
| 1943 | |
| 1944 | put_uobj_write(&obj->uevent.uobject); |
| 1945 | return ret; |
| 1946 | } |
| 1947 | |
| 1948 | static int ib_uverbs_create_qp_cb(struct ib_uverbs_file *file, |
| 1949 | struct ib_uverbs_ex_create_qp_resp *resp, |
| 1950 | struct ib_udata *ucore) |
| 1951 | { |
| 1952 | if (ib_copy_to_udata(ucore, &resp->base, sizeof(resp->base))) |
| 1953 | return -EFAULT; |
| 1954 | |
| 1955 | return 0; |
| 1956 | } |
| 1957 | |
| 1958 | ssize_t ib_uverbs_create_qp(struct ib_uverbs_file *file, |
| 1959 | struct ib_device *ib_dev, |
| 1960 | const char __user *buf, int in_len, |
| 1961 | int out_len) |
| 1962 | { |
| 1963 | struct ib_uverbs_create_qp cmd; |
| 1964 | struct ib_uverbs_ex_create_qp cmd_ex; |
| 1965 | struct ib_udata ucore; |
| 1966 | struct ib_udata uhw; |
| 1967 | ssize_t resp_size = sizeof(struct ib_uverbs_create_qp_resp); |
| 1968 | int err; |
| 1969 | |
| 1970 | if (out_len < resp_size) |
| 1971 | return -ENOSPC; |
| 1972 | |
| 1973 | if (copy_from_user(&cmd, buf, sizeof(cmd))) |
| 1974 | return -EFAULT; |
| 1975 | |
| 1976 | INIT_UDATA(&ucore, buf, (unsigned long)cmd.response, sizeof(cmd), |
| 1977 | resp_size); |
| 1978 | INIT_UDATA(&uhw, buf + sizeof(cmd), |
| 1979 | (unsigned long)cmd.response + resp_size, |
| 1980 | in_len - sizeof(cmd) - sizeof(struct ib_uverbs_cmd_hdr), |
| 1981 | out_len - resp_size); |
| 1982 | |
| 1983 | memset(&cmd_ex, 0, sizeof(cmd_ex)); |
| 1984 | cmd_ex.user_handle = cmd.user_handle; |
| 1985 | cmd_ex.pd_handle = cmd.pd_handle; |
| 1986 | cmd_ex.send_cq_handle = cmd.send_cq_handle; |
| 1987 | cmd_ex.recv_cq_handle = cmd.recv_cq_handle; |
| 1988 | cmd_ex.srq_handle = cmd.srq_handle; |
| 1989 | cmd_ex.max_send_wr = cmd.max_send_wr; |
| 1990 | cmd_ex.max_recv_wr = cmd.max_recv_wr; |
| 1991 | cmd_ex.max_send_sge = cmd.max_send_sge; |
| 1992 | cmd_ex.max_recv_sge = cmd.max_recv_sge; |
| 1993 | cmd_ex.max_inline_data = cmd.max_inline_data; |
| 1994 | cmd_ex.sq_sig_all = cmd.sq_sig_all; |
| 1995 | cmd_ex.qp_type = cmd.qp_type; |
| 1996 | cmd_ex.is_srq = cmd.is_srq; |
| 1997 | |
| 1998 | err = create_qp(file, &ucore, &uhw, &cmd_ex, |
| 1999 | offsetof(typeof(cmd_ex), is_srq) + |
| 2000 | sizeof(cmd.is_srq), ib_uverbs_create_qp_cb, |
| 2001 | NULL); |
| 2002 | |
| 2003 | if (err) |
| 2004 | return err; |
| 2005 | |
| 2006 | return in_len; |
| 2007 | } |
| 2008 | |
| 2009 | static int ib_uverbs_ex_create_qp_cb(struct ib_uverbs_file *file, |
| 2010 | struct ib_uverbs_ex_create_qp_resp *resp, |
| 2011 | struct ib_udata *ucore) |
| 2012 | { |
| 2013 | if (ib_copy_to_udata(ucore, resp, resp->response_length)) |
| 2014 | return -EFAULT; |
| 2015 | |
| 2016 | return 0; |
| 2017 | } |
| 2018 | |
| 2019 | int ib_uverbs_ex_create_qp(struct ib_uverbs_file *file, |
| 2020 | struct ib_device *ib_dev, |
| 2021 | struct ib_udata *ucore, |
| 2022 | struct ib_udata *uhw) |
| 2023 | { |
| 2024 | struct ib_uverbs_ex_create_qp_resp resp; |
| 2025 | struct ib_uverbs_ex_create_qp cmd = {0}; |
| 2026 | int err; |
| 2027 | |
| 2028 | if (ucore->inlen < (offsetof(typeof(cmd), comp_mask) + |
| 2029 | sizeof(cmd.comp_mask))) |
| 2030 | return -EINVAL; |
| 2031 | |
| 2032 | err = ib_copy_from_udata(&cmd, ucore, min(sizeof(cmd), ucore->inlen)); |
| 2033 | if (err) |
| 2034 | return err; |
| 2035 | |
| 2036 | if (cmd.comp_mask) |
| 2037 | return -EINVAL; |
| 2038 | |
| 2039 | if (cmd.reserved) |
| 2040 | return -EINVAL; |
| 2041 | |
| 2042 | if (ucore->outlen < (offsetof(typeof(resp), response_length) + |
| 2043 | sizeof(resp.response_length))) |
| 2044 | return -ENOSPC; |
| 2045 | |
| 2046 | err = create_qp(file, ucore, uhw, &cmd, |
| 2047 | min(ucore->inlen, sizeof(cmd)), |
| 2048 | ib_uverbs_ex_create_qp_cb, NULL); |
| 2049 | |
| 2050 | if (err) |
| 2051 | return err; |
| 2052 | |
| 2053 | return 0; |
| 2054 | } |
| 2055 | |
| 2056 | ssize_t ib_uverbs_open_qp(struct ib_uverbs_file *file, |
| 2057 | struct ib_device *ib_dev, |
| 2058 | const char __user *buf, int in_len, int out_len) |
| 2059 | { |
| 2060 | struct ib_uverbs_open_qp cmd; |
| 2061 | struct ib_uverbs_create_qp_resp resp; |
| 2062 | struct ib_udata udata; |
| 2063 | struct ib_uqp_object *obj; |
| 2064 | struct ib_xrcd *xrcd; |
| 2065 | struct ib_uobject *uninitialized_var(xrcd_uobj); |
| 2066 | struct ib_qp *qp; |
| 2067 | struct ib_qp_open_attr attr; |
| 2068 | int ret; |
| 2069 | |
| 2070 | if (out_len < sizeof resp) |
| 2071 | return -ENOSPC; |
| 2072 | |
| 2073 | if (copy_from_user(&cmd, buf, sizeof cmd)) |
| 2074 | return -EFAULT; |
| 2075 | |
| 2076 | INIT_UDATA(&udata, buf + sizeof cmd, |
| 2077 | (unsigned long) cmd.response + sizeof resp, |
| 2078 | in_len - sizeof cmd, out_len - sizeof resp); |
| 2079 | |
| 2080 | obj = kmalloc(sizeof *obj, GFP_KERNEL); |
| 2081 | if (!obj) |
| 2082 | return -ENOMEM; |
| 2083 | |
| 2084 | init_uobj(&obj->uevent.uobject, cmd.user_handle, file->ucontext, &qp_lock_class); |
| 2085 | down_write(&obj->uevent.uobject.mutex); |
| 2086 | |
| 2087 | xrcd = idr_read_xrcd(cmd.pd_handle, file->ucontext, &xrcd_uobj); |
| 2088 | if (!xrcd) { |
| 2089 | ret = -EINVAL; |
| 2090 | goto err_put; |
| 2091 | } |
| 2092 | |
| 2093 | attr.event_handler = ib_uverbs_qp_event_handler; |
| 2094 | attr.qp_context = file; |
| 2095 | attr.qp_num = cmd.qpn; |
| 2096 | attr.qp_type = cmd.qp_type; |
| 2097 | |
| 2098 | obj->uevent.events_reported = 0; |
| 2099 | INIT_LIST_HEAD(&obj->uevent.event_list); |
| 2100 | INIT_LIST_HEAD(&obj->mcast_list); |
| 2101 | |
| 2102 | qp = ib_open_qp(xrcd, &attr); |
| 2103 | if (IS_ERR(qp)) { |
| 2104 | ret = PTR_ERR(qp); |
| 2105 | goto err_put; |
| 2106 | } |
| 2107 | |
| 2108 | qp->uobject = &obj->uevent.uobject; |
| 2109 | |
| 2110 | obj->uevent.uobject.object = qp; |
| 2111 | ret = idr_add_uobj(&ib_uverbs_qp_idr, &obj->uevent.uobject); |
| 2112 | if (ret) |
| 2113 | goto err_destroy; |
| 2114 | |
| 2115 | memset(&resp, 0, sizeof resp); |
| 2116 | resp.qpn = qp->qp_num; |
| 2117 | resp.qp_handle = obj->uevent.uobject.id; |
| 2118 | |
| 2119 | if (copy_to_user((void __user *) (unsigned long) cmd.response, |
| 2120 | &resp, sizeof resp)) { |
| 2121 | ret = -EFAULT; |
| 2122 | goto err_remove; |
| 2123 | } |
| 2124 | |
| 2125 | obj->uxrcd = container_of(xrcd_uobj, struct ib_uxrcd_object, uobject); |
| 2126 | atomic_inc(&obj->uxrcd->refcnt); |
| 2127 | put_xrcd_read(xrcd_uobj); |
| 2128 | |
| 2129 | mutex_lock(&file->mutex); |
| 2130 | list_add_tail(&obj->uevent.uobject.list, &file->ucontext->qp_list); |
| 2131 | mutex_unlock(&file->mutex); |
| 2132 | |
| 2133 | obj->uevent.uobject.live = 1; |
| 2134 | |
| 2135 | up_write(&obj->uevent.uobject.mutex); |
| 2136 | |
| 2137 | return in_len; |
| 2138 | |
| 2139 | err_remove: |
| 2140 | idr_remove_uobj(&ib_uverbs_qp_idr, &obj->uevent.uobject); |
| 2141 | |
| 2142 | err_destroy: |
| 2143 | ib_destroy_qp(qp); |
| 2144 | |
| 2145 | err_put: |
| 2146 | put_xrcd_read(xrcd_uobj); |
| 2147 | put_uobj_write(&obj->uevent.uobject); |
| 2148 | return ret; |
| 2149 | } |
| 2150 | |
| 2151 | ssize_t ib_uverbs_query_qp(struct ib_uverbs_file *file, |
| 2152 | struct ib_device *ib_dev, |
| 2153 | const char __user *buf, int in_len, |
| 2154 | int out_len) |
| 2155 | { |
| 2156 | struct ib_uverbs_query_qp cmd; |
| 2157 | struct ib_uverbs_query_qp_resp resp; |
| 2158 | struct ib_qp *qp; |
| 2159 | struct ib_qp_attr *attr; |
| 2160 | struct ib_qp_init_attr *init_attr; |
| 2161 | int ret; |
| 2162 | |
| 2163 | if (copy_from_user(&cmd, buf, sizeof cmd)) |
| 2164 | return -EFAULT; |
| 2165 | |
| 2166 | attr = kmalloc(sizeof *attr, GFP_KERNEL); |
| 2167 | init_attr = kmalloc(sizeof *init_attr, GFP_KERNEL); |
| 2168 | if (!attr || !init_attr) { |
| 2169 | ret = -ENOMEM; |
| 2170 | goto out; |
| 2171 | } |
| 2172 | |
| 2173 | qp = idr_read_qp(cmd.qp_handle, file->ucontext); |
| 2174 | if (!qp) { |
| 2175 | ret = -EINVAL; |
| 2176 | goto out; |
| 2177 | } |
| 2178 | |
| 2179 | ret = ib_query_qp(qp, attr, cmd.attr_mask, init_attr); |
| 2180 | |
| 2181 | put_qp_read(qp); |
| 2182 | |
| 2183 | if (ret) |
| 2184 | goto out; |
| 2185 | |
| 2186 | memset(&resp, 0, sizeof resp); |
| 2187 | |
| 2188 | resp.qp_state = attr->qp_state; |
| 2189 | resp.cur_qp_state = attr->cur_qp_state; |
| 2190 | resp.path_mtu = attr->path_mtu; |
| 2191 | resp.path_mig_state = attr->path_mig_state; |
| 2192 | resp.qkey = attr->qkey; |
| 2193 | resp.rq_psn = attr->rq_psn; |
| 2194 | resp.sq_psn = attr->sq_psn; |
| 2195 | resp.dest_qp_num = attr->dest_qp_num; |
| 2196 | resp.qp_access_flags = attr->qp_access_flags; |
| 2197 | resp.pkey_index = attr->pkey_index; |
| 2198 | resp.alt_pkey_index = attr->alt_pkey_index; |
| 2199 | resp.sq_draining = attr->sq_draining; |
| 2200 | resp.max_rd_atomic = attr->max_rd_atomic; |
| 2201 | resp.max_dest_rd_atomic = attr->max_dest_rd_atomic; |
| 2202 | resp.min_rnr_timer = attr->min_rnr_timer; |
| 2203 | resp.port_num = attr->port_num; |
| 2204 | resp.timeout = attr->timeout; |
| 2205 | resp.retry_cnt = attr->retry_cnt; |
| 2206 | resp.rnr_retry = attr->rnr_retry; |
| 2207 | resp.alt_port_num = attr->alt_port_num; |
| 2208 | resp.alt_timeout = attr->alt_timeout; |
| 2209 | |
| 2210 | memcpy(resp.dest.dgid, attr->ah_attr.grh.dgid.raw, 16); |
| 2211 | resp.dest.flow_label = attr->ah_attr.grh.flow_label; |
| 2212 | resp.dest.sgid_index = attr->ah_attr.grh.sgid_index; |
| 2213 | resp.dest.hop_limit = attr->ah_attr.grh.hop_limit; |
| 2214 | resp.dest.traffic_class = attr->ah_attr.grh.traffic_class; |
| 2215 | resp.dest.dlid = attr->ah_attr.dlid; |
| 2216 | resp.dest.sl = attr->ah_attr.sl; |
| 2217 | resp.dest.src_path_bits = attr->ah_attr.src_path_bits; |
| 2218 | resp.dest.static_rate = attr->ah_attr.static_rate; |
| 2219 | resp.dest.is_global = !!(attr->ah_attr.ah_flags & IB_AH_GRH); |
| 2220 | resp.dest.port_num = attr->ah_attr.port_num; |
| 2221 | |
| 2222 | memcpy(resp.alt_dest.dgid, attr->alt_ah_attr.grh.dgid.raw, 16); |
| 2223 | resp.alt_dest.flow_label = attr->alt_ah_attr.grh.flow_label; |
| 2224 | resp.alt_dest.sgid_index = attr->alt_ah_attr.grh.sgid_index; |
| 2225 | resp.alt_dest.hop_limit = attr->alt_ah_attr.grh.hop_limit; |
| 2226 | resp.alt_dest.traffic_class = attr->alt_ah_attr.grh.traffic_class; |
| 2227 | resp.alt_dest.dlid = attr->alt_ah_attr.dlid; |
| 2228 | resp.alt_dest.sl = attr->alt_ah_attr.sl; |
| 2229 | resp.alt_dest.src_path_bits = attr->alt_ah_attr.src_path_bits; |
| 2230 | resp.alt_dest.static_rate = attr->alt_ah_attr.static_rate; |
| 2231 | resp.alt_dest.is_global = !!(attr->alt_ah_attr.ah_flags & IB_AH_GRH); |
| 2232 | resp.alt_dest.port_num = attr->alt_ah_attr.port_num; |
| 2233 | |
| 2234 | resp.max_send_wr = init_attr->cap.max_send_wr; |
| 2235 | resp.max_recv_wr = init_attr->cap.max_recv_wr; |
| 2236 | resp.max_send_sge = init_attr->cap.max_send_sge; |
| 2237 | resp.max_recv_sge = init_attr->cap.max_recv_sge; |
| 2238 | resp.max_inline_data = init_attr->cap.max_inline_data; |
| 2239 | resp.sq_sig_all = init_attr->sq_sig_type == IB_SIGNAL_ALL_WR; |
| 2240 | |
| 2241 | if (copy_to_user((void __user *) (unsigned long) cmd.response, |
| 2242 | &resp, sizeof resp)) |
| 2243 | ret = -EFAULT; |
| 2244 | |
| 2245 | out: |
| 2246 | kfree(attr); |
| 2247 | kfree(init_attr); |
| 2248 | |
| 2249 | return ret ? ret : in_len; |
| 2250 | } |
| 2251 | |
| 2252 | /* Remove ignored fields set in the attribute mask */ |
| 2253 | static int modify_qp_mask(enum ib_qp_type qp_type, int mask) |
| 2254 | { |
| 2255 | switch (qp_type) { |
| 2256 | case IB_QPT_XRC_INI: |
| 2257 | return mask & ~(IB_QP_MAX_DEST_RD_ATOMIC | IB_QP_MIN_RNR_TIMER); |
| 2258 | case IB_QPT_XRC_TGT: |
| 2259 | return mask & ~(IB_QP_MAX_QP_RD_ATOMIC | IB_QP_RETRY_CNT | |
| 2260 | IB_QP_RNR_RETRY); |
| 2261 | default: |
| 2262 | return mask; |
| 2263 | } |
| 2264 | } |
| 2265 | |
| 2266 | ssize_t ib_uverbs_modify_qp(struct ib_uverbs_file *file, |
| 2267 | struct ib_device *ib_dev, |
| 2268 | const char __user *buf, int in_len, |
| 2269 | int out_len) |
| 2270 | { |
| 2271 | struct ib_uverbs_modify_qp cmd; |
| 2272 | struct ib_udata udata; |
| 2273 | struct ib_qp *qp; |
| 2274 | struct ib_qp_attr *attr; |
| 2275 | int ret; |
| 2276 | |
| 2277 | if (copy_from_user(&cmd, buf, sizeof cmd)) |
| 2278 | return -EFAULT; |
| 2279 | |
| 2280 | INIT_UDATA(&udata, buf + sizeof cmd, NULL, in_len - sizeof cmd, |
| 2281 | out_len); |
| 2282 | |
| 2283 | attr = kmalloc(sizeof *attr, GFP_KERNEL); |
| 2284 | if (!attr) |
| 2285 | return -ENOMEM; |
| 2286 | |
| 2287 | qp = idr_read_qp(cmd.qp_handle, file->ucontext); |
| 2288 | if (!qp) { |
| 2289 | ret = -EINVAL; |
| 2290 | goto out; |
| 2291 | } |
| 2292 | |
| 2293 | attr->qp_state = cmd.qp_state; |
| 2294 | attr->cur_qp_state = cmd.cur_qp_state; |
| 2295 | attr->path_mtu = cmd.path_mtu; |
| 2296 | attr->path_mig_state = cmd.path_mig_state; |
| 2297 | attr->qkey = cmd.qkey; |
| 2298 | attr->rq_psn = cmd.rq_psn; |
| 2299 | attr->sq_psn = cmd.sq_psn; |
| 2300 | attr->dest_qp_num = cmd.dest_qp_num; |
| 2301 | attr->qp_access_flags = cmd.qp_access_flags; |
| 2302 | attr->pkey_index = cmd.pkey_index; |
| 2303 | attr->alt_pkey_index = cmd.alt_pkey_index; |
| 2304 | attr->en_sqd_async_notify = cmd.en_sqd_async_notify; |
| 2305 | attr->max_rd_atomic = cmd.max_rd_atomic; |
| 2306 | attr->max_dest_rd_atomic = cmd.max_dest_rd_atomic; |
| 2307 | attr->min_rnr_timer = cmd.min_rnr_timer; |
| 2308 | attr->port_num = cmd.port_num; |
| 2309 | attr->timeout = cmd.timeout; |
| 2310 | attr->retry_cnt = cmd.retry_cnt; |
| 2311 | attr->rnr_retry = cmd.rnr_retry; |
| 2312 | attr->alt_port_num = cmd.alt_port_num; |
| 2313 | attr->alt_timeout = cmd.alt_timeout; |
| 2314 | |
| 2315 | memcpy(attr->ah_attr.grh.dgid.raw, cmd.dest.dgid, 16); |
| 2316 | attr->ah_attr.grh.flow_label = cmd.dest.flow_label; |
| 2317 | attr->ah_attr.grh.sgid_index = cmd.dest.sgid_index; |
| 2318 | attr->ah_attr.grh.hop_limit = cmd.dest.hop_limit; |
| 2319 | attr->ah_attr.grh.traffic_class = cmd.dest.traffic_class; |
| 2320 | attr->ah_attr.dlid = cmd.dest.dlid; |
| 2321 | attr->ah_attr.sl = cmd.dest.sl; |
| 2322 | attr->ah_attr.src_path_bits = cmd.dest.src_path_bits; |
| 2323 | attr->ah_attr.static_rate = cmd.dest.static_rate; |
| 2324 | attr->ah_attr.ah_flags = cmd.dest.is_global ? IB_AH_GRH : 0; |
| 2325 | attr->ah_attr.port_num = cmd.dest.port_num; |
| 2326 | |
| 2327 | memcpy(attr->alt_ah_attr.grh.dgid.raw, cmd.alt_dest.dgid, 16); |
| 2328 | attr->alt_ah_attr.grh.flow_label = cmd.alt_dest.flow_label; |
| 2329 | attr->alt_ah_attr.grh.sgid_index = cmd.alt_dest.sgid_index; |
| 2330 | attr->alt_ah_attr.grh.hop_limit = cmd.alt_dest.hop_limit; |
| 2331 | attr->alt_ah_attr.grh.traffic_class = cmd.alt_dest.traffic_class; |
| 2332 | attr->alt_ah_attr.dlid = cmd.alt_dest.dlid; |
| 2333 | attr->alt_ah_attr.sl = cmd.alt_dest.sl; |
| 2334 | attr->alt_ah_attr.src_path_bits = cmd.alt_dest.src_path_bits; |
| 2335 | attr->alt_ah_attr.static_rate = cmd.alt_dest.static_rate; |
| 2336 | attr->alt_ah_attr.ah_flags = cmd.alt_dest.is_global ? IB_AH_GRH : 0; |
| 2337 | attr->alt_ah_attr.port_num = cmd.alt_dest.port_num; |
| 2338 | |
| 2339 | if (qp->real_qp == qp) { |
| 2340 | ret = ib_resolve_eth_dmac(qp, attr, &cmd.attr_mask); |
| 2341 | if (ret) |
| 2342 | goto release_qp; |
| 2343 | ret = qp->device->modify_qp(qp, attr, |
| 2344 | modify_qp_mask(qp->qp_type, cmd.attr_mask), &udata); |
| 2345 | } else { |
| 2346 | ret = ib_modify_qp(qp, attr, modify_qp_mask(qp->qp_type, cmd.attr_mask)); |
| 2347 | } |
| 2348 | |
| 2349 | if (ret) |
| 2350 | goto release_qp; |
| 2351 | |
| 2352 | ret = in_len; |
| 2353 | |
| 2354 | release_qp: |
| 2355 | put_qp_read(qp); |
| 2356 | |
| 2357 | out: |
| 2358 | kfree(attr); |
| 2359 | |
| 2360 | return ret; |
| 2361 | } |
| 2362 | |
| 2363 | ssize_t ib_uverbs_destroy_qp(struct ib_uverbs_file *file, |
| 2364 | struct ib_device *ib_dev, |
| 2365 | const char __user *buf, int in_len, |
| 2366 | int out_len) |
| 2367 | { |
| 2368 | struct ib_uverbs_destroy_qp cmd; |
| 2369 | struct ib_uverbs_destroy_qp_resp resp; |
| 2370 | struct ib_uobject *uobj; |
| 2371 | struct ib_qp *qp; |
| 2372 | struct ib_uqp_object *obj; |
| 2373 | int ret = -EINVAL; |
| 2374 | |
| 2375 | if (copy_from_user(&cmd, buf, sizeof cmd)) |
| 2376 | return -EFAULT; |
| 2377 | |
| 2378 | memset(&resp, 0, sizeof resp); |
| 2379 | |
| 2380 | uobj = idr_write_uobj(&ib_uverbs_qp_idr, cmd.qp_handle, file->ucontext); |
| 2381 | if (!uobj) |
| 2382 | return -EINVAL; |
| 2383 | qp = uobj->object; |
| 2384 | obj = container_of(uobj, struct ib_uqp_object, uevent.uobject); |
| 2385 | |
| 2386 | if (!list_empty(&obj->mcast_list)) { |
| 2387 | put_uobj_write(uobj); |
| 2388 | return -EBUSY; |
| 2389 | } |
| 2390 | |
| 2391 | ret = ib_destroy_qp(qp); |
| 2392 | if (!ret) |
| 2393 | uobj->live = 0; |
| 2394 | |
| 2395 | put_uobj_write(uobj); |
| 2396 | |
| 2397 | if (ret) |
| 2398 | return ret; |
| 2399 | |
| 2400 | if (obj->uxrcd) |
| 2401 | atomic_dec(&obj->uxrcd->refcnt); |
| 2402 | |
| 2403 | idr_remove_uobj(&ib_uverbs_qp_idr, uobj); |
| 2404 | |
| 2405 | mutex_lock(&file->mutex); |
| 2406 | list_del(&uobj->list); |
| 2407 | mutex_unlock(&file->mutex); |
| 2408 | |
| 2409 | ib_uverbs_release_uevent(file, &obj->uevent); |
| 2410 | |
| 2411 | resp.events_reported = obj->uevent.events_reported; |
| 2412 | |
| 2413 | put_uobj(uobj); |
| 2414 | |
| 2415 | if (copy_to_user((void __user *) (unsigned long) cmd.response, |
| 2416 | &resp, sizeof resp)) |
| 2417 | return -EFAULT; |
| 2418 | |
| 2419 | return in_len; |
| 2420 | } |
| 2421 | |
| 2422 | static void *alloc_wr(size_t wr_size, __u32 num_sge) |
| 2423 | { |
| 2424 | return kmalloc(ALIGN(wr_size, sizeof (struct ib_sge)) + |
| 2425 | num_sge * sizeof (struct ib_sge), GFP_KERNEL); |
| 2426 | }; |
| 2427 | |
| 2428 | ssize_t ib_uverbs_post_send(struct ib_uverbs_file *file, |
| 2429 | struct ib_device *ib_dev, |
| 2430 | const char __user *buf, int in_len, |
| 2431 | int out_len) |
| 2432 | { |
| 2433 | struct ib_uverbs_post_send cmd; |
| 2434 | struct ib_uverbs_post_send_resp resp; |
| 2435 | struct ib_uverbs_send_wr *user_wr; |
| 2436 | struct ib_send_wr *wr = NULL, *last, *next, *bad_wr; |
| 2437 | struct ib_qp *qp; |
| 2438 | int i, sg_ind; |
| 2439 | int is_ud; |
| 2440 | ssize_t ret = -EINVAL; |
| 2441 | size_t next_size; |
| 2442 | |
| 2443 | if (copy_from_user(&cmd, buf, sizeof cmd)) |
| 2444 | return -EFAULT; |
| 2445 | |
| 2446 | if (in_len < sizeof cmd + cmd.wqe_size * cmd.wr_count + |
| 2447 | cmd.sge_count * sizeof (struct ib_uverbs_sge)) |
| 2448 | return -EINVAL; |
| 2449 | |
| 2450 | if (cmd.wqe_size < sizeof (struct ib_uverbs_send_wr)) |
| 2451 | return -EINVAL; |
| 2452 | |
| 2453 | user_wr = kmalloc(cmd.wqe_size, GFP_KERNEL); |
| 2454 | if (!user_wr) |
| 2455 | return -ENOMEM; |
| 2456 | |
| 2457 | qp = idr_read_qp(cmd.qp_handle, file->ucontext); |
| 2458 | if (!qp) |
| 2459 | goto out; |
| 2460 | |
| 2461 | is_ud = qp->qp_type == IB_QPT_UD; |
| 2462 | sg_ind = 0; |
| 2463 | last = NULL; |
| 2464 | for (i = 0; i < cmd.wr_count; ++i) { |
| 2465 | if (copy_from_user(user_wr, |
| 2466 | buf + sizeof cmd + i * cmd.wqe_size, |
| 2467 | cmd.wqe_size)) { |
| 2468 | ret = -EFAULT; |
| 2469 | goto out_put; |
| 2470 | } |
| 2471 | |
| 2472 | if (user_wr->num_sge + sg_ind > cmd.sge_count) { |
| 2473 | ret = -EINVAL; |
| 2474 | goto out_put; |
| 2475 | } |
| 2476 | |
| 2477 | if (is_ud) { |
| 2478 | struct ib_ud_wr *ud; |
| 2479 | |
| 2480 | if (user_wr->opcode != IB_WR_SEND && |
| 2481 | user_wr->opcode != IB_WR_SEND_WITH_IMM) { |
| 2482 | ret = -EINVAL; |
| 2483 | goto out_put; |
| 2484 | } |
| 2485 | |
| 2486 | next_size = sizeof(*ud); |
| 2487 | ud = alloc_wr(next_size, user_wr->num_sge); |
| 2488 | if (!ud) { |
| 2489 | ret = -ENOMEM; |
| 2490 | goto out_put; |
| 2491 | } |
| 2492 | |
| 2493 | ud->ah = idr_read_ah(user_wr->wr.ud.ah, file->ucontext); |
| 2494 | if (!ud->ah) { |
| 2495 | kfree(ud); |
| 2496 | ret = -EINVAL; |
| 2497 | goto out_put; |
| 2498 | } |
| 2499 | ud->remote_qpn = user_wr->wr.ud.remote_qpn; |
| 2500 | ud->remote_qkey = user_wr->wr.ud.remote_qkey; |
| 2501 | |
| 2502 | next = &ud->wr; |
| 2503 | } else if (user_wr->opcode == IB_WR_RDMA_WRITE_WITH_IMM || |
| 2504 | user_wr->opcode == IB_WR_RDMA_WRITE || |
| 2505 | user_wr->opcode == IB_WR_RDMA_READ) { |
| 2506 | struct ib_rdma_wr *rdma; |
| 2507 | |
| 2508 | next_size = sizeof(*rdma); |
| 2509 | rdma = alloc_wr(next_size, user_wr->num_sge); |
| 2510 | if (!rdma) { |
| 2511 | ret = -ENOMEM; |
| 2512 | goto out_put; |
| 2513 | } |
| 2514 | |
| 2515 | rdma->remote_addr = user_wr->wr.rdma.remote_addr; |
| 2516 | rdma->rkey = user_wr->wr.rdma.rkey; |
| 2517 | |
| 2518 | next = &rdma->wr; |
| 2519 | } else if (user_wr->opcode == IB_WR_ATOMIC_CMP_AND_SWP || |
| 2520 | user_wr->opcode == IB_WR_ATOMIC_FETCH_AND_ADD) { |
| 2521 | struct ib_atomic_wr *atomic; |
| 2522 | |
| 2523 | next_size = sizeof(*atomic); |
| 2524 | atomic = alloc_wr(next_size, user_wr->num_sge); |
| 2525 | if (!atomic) { |
| 2526 | ret = -ENOMEM; |
| 2527 | goto out_put; |
| 2528 | } |
| 2529 | |
| 2530 | atomic->remote_addr = user_wr->wr.atomic.remote_addr; |
| 2531 | atomic->compare_add = user_wr->wr.atomic.compare_add; |
| 2532 | atomic->swap = user_wr->wr.atomic.swap; |
| 2533 | atomic->rkey = user_wr->wr.atomic.rkey; |
| 2534 | |
| 2535 | next = &atomic->wr; |
| 2536 | } else if (user_wr->opcode == IB_WR_SEND || |
| 2537 | user_wr->opcode == IB_WR_SEND_WITH_IMM || |
| 2538 | user_wr->opcode == IB_WR_SEND_WITH_INV) { |
| 2539 | next_size = sizeof(*next); |
| 2540 | next = alloc_wr(next_size, user_wr->num_sge); |
| 2541 | if (!next) { |
| 2542 | ret = -ENOMEM; |
| 2543 | goto out_put; |
| 2544 | } |
| 2545 | } else { |
| 2546 | ret = -EINVAL; |
| 2547 | goto out_put; |
| 2548 | } |
| 2549 | |
| 2550 | if (user_wr->opcode == IB_WR_SEND_WITH_IMM || |
| 2551 | user_wr->opcode == IB_WR_RDMA_WRITE_WITH_IMM) { |
| 2552 | next->ex.imm_data = |
| 2553 | (__be32 __force) user_wr->ex.imm_data; |
| 2554 | } else if (user_wr->opcode == IB_WR_SEND_WITH_INV) { |
| 2555 | next->ex.invalidate_rkey = user_wr->ex.invalidate_rkey; |
| 2556 | } |
| 2557 | |
| 2558 | if (!last) |
| 2559 | wr = next; |
| 2560 | else |
| 2561 | last->next = next; |
| 2562 | last = next; |
| 2563 | |
| 2564 | next->next = NULL; |
| 2565 | next->wr_id = user_wr->wr_id; |
| 2566 | next->num_sge = user_wr->num_sge; |
| 2567 | next->opcode = user_wr->opcode; |
| 2568 | next->send_flags = user_wr->send_flags; |
| 2569 | |
| 2570 | if (next->num_sge) { |
| 2571 | next->sg_list = (void *) next + |
| 2572 | ALIGN(next_size, sizeof(struct ib_sge)); |
| 2573 | if (copy_from_user(next->sg_list, |
| 2574 | buf + sizeof cmd + |
| 2575 | cmd.wr_count * cmd.wqe_size + |
| 2576 | sg_ind * sizeof (struct ib_sge), |
| 2577 | next->num_sge * sizeof (struct ib_sge))) { |
| 2578 | ret = -EFAULT; |
| 2579 | goto out_put; |
| 2580 | } |
| 2581 | sg_ind += next->num_sge; |
| 2582 | } else |
| 2583 | next->sg_list = NULL; |
| 2584 | } |
| 2585 | |
| 2586 | resp.bad_wr = 0; |
| 2587 | ret = qp->device->post_send(qp->real_qp, wr, &bad_wr); |
| 2588 | if (ret) |
| 2589 | for (next = wr; next; next = next->next) { |
| 2590 | ++resp.bad_wr; |
| 2591 | if (next == bad_wr) |
| 2592 | break; |
| 2593 | } |
| 2594 | |
| 2595 | if (copy_to_user((void __user *) (unsigned long) cmd.response, |
| 2596 | &resp, sizeof resp)) |
| 2597 | ret = -EFAULT; |
| 2598 | |
| 2599 | out_put: |
| 2600 | put_qp_read(qp); |
| 2601 | |
| 2602 | while (wr) { |
| 2603 | if (is_ud && ud_wr(wr)->ah) |
| 2604 | put_ah_read(ud_wr(wr)->ah); |
| 2605 | next = wr->next; |
| 2606 | kfree(wr); |
| 2607 | wr = next; |
| 2608 | } |
| 2609 | |
| 2610 | out: |
| 2611 | kfree(user_wr); |
| 2612 | |
| 2613 | return ret ? ret : in_len; |
| 2614 | } |
| 2615 | |
| 2616 | static struct ib_recv_wr *ib_uverbs_unmarshall_recv(const char __user *buf, |
| 2617 | int in_len, |
| 2618 | u32 wr_count, |
| 2619 | u32 sge_count, |
| 2620 | u32 wqe_size) |
| 2621 | { |
| 2622 | struct ib_uverbs_recv_wr *user_wr; |
| 2623 | struct ib_recv_wr *wr = NULL, *last, *next; |
| 2624 | int sg_ind; |
| 2625 | int i; |
| 2626 | int ret; |
| 2627 | |
| 2628 | if (in_len < wqe_size * wr_count + |
| 2629 | sge_count * sizeof (struct ib_uverbs_sge)) |
| 2630 | return ERR_PTR(-EINVAL); |
| 2631 | |
| 2632 | if (wqe_size < sizeof (struct ib_uverbs_recv_wr)) |
| 2633 | return ERR_PTR(-EINVAL); |
| 2634 | |
| 2635 | user_wr = kmalloc(wqe_size, GFP_KERNEL); |
| 2636 | if (!user_wr) |
| 2637 | return ERR_PTR(-ENOMEM); |
| 2638 | |
| 2639 | sg_ind = 0; |
| 2640 | last = NULL; |
| 2641 | for (i = 0; i < wr_count; ++i) { |
| 2642 | if (copy_from_user(user_wr, buf + i * wqe_size, |
| 2643 | wqe_size)) { |
| 2644 | ret = -EFAULT; |
| 2645 | goto err; |
| 2646 | } |
| 2647 | |
| 2648 | if (user_wr->num_sge + sg_ind > sge_count) { |
| 2649 | ret = -EINVAL; |
| 2650 | goto err; |
| 2651 | } |
| 2652 | |
| 2653 | next = kmalloc(ALIGN(sizeof *next, sizeof (struct ib_sge)) + |
| 2654 | user_wr->num_sge * sizeof (struct ib_sge), |
| 2655 | GFP_KERNEL); |
| 2656 | if (!next) { |
| 2657 | ret = -ENOMEM; |
| 2658 | goto err; |
| 2659 | } |
| 2660 | |
| 2661 | if (!last) |
| 2662 | wr = next; |
| 2663 | else |
| 2664 | last->next = next; |
| 2665 | last = next; |
| 2666 | |
| 2667 | next->next = NULL; |
| 2668 | next->wr_id = user_wr->wr_id; |
| 2669 | next->num_sge = user_wr->num_sge; |
| 2670 | |
| 2671 | if (next->num_sge) { |
| 2672 | next->sg_list = (void *) next + |
| 2673 | ALIGN(sizeof *next, sizeof (struct ib_sge)); |
| 2674 | if (copy_from_user(next->sg_list, |
| 2675 | buf + wr_count * wqe_size + |
| 2676 | sg_ind * sizeof (struct ib_sge), |
| 2677 | next->num_sge * sizeof (struct ib_sge))) { |
| 2678 | ret = -EFAULT; |
| 2679 | goto err; |
| 2680 | } |
| 2681 | sg_ind += next->num_sge; |
| 2682 | } else |
| 2683 | next->sg_list = NULL; |
| 2684 | } |
| 2685 | |
| 2686 | kfree(user_wr); |
| 2687 | return wr; |
| 2688 | |
| 2689 | err: |
| 2690 | kfree(user_wr); |
| 2691 | |
| 2692 | while (wr) { |
| 2693 | next = wr->next; |
| 2694 | kfree(wr); |
| 2695 | wr = next; |
| 2696 | } |
| 2697 | |
| 2698 | return ERR_PTR(ret); |
| 2699 | } |
| 2700 | |
| 2701 | ssize_t ib_uverbs_post_recv(struct ib_uverbs_file *file, |
| 2702 | struct ib_device *ib_dev, |
| 2703 | const char __user *buf, int in_len, |
| 2704 | int out_len) |
| 2705 | { |
| 2706 | struct ib_uverbs_post_recv cmd; |
| 2707 | struct ib_uverbs_post_recv_resp resp; |
| 2708 | struct ib_recv_wr *wr, *next, *bad_wr; |
| 2709 | struct ib_qp *qp; |
| 2710 | ssize_t ret = -EINVAL; |
| 2711 | |
| 2712 | if (copy_from_user(&cmd, buf, sizeof cmd)) |
| 2713 | return -EFAULT; |
| 2714 | |
| 2715 | wr = ib_uverbs_unmarshall_recv(buf + sizeof cmd, |
| 2716 | in_len - sizeof cmd, cmd.wr_count, |
| 2717 | cmd.sge_count, cmd.wqe_size); |
| 2718 | if (IS_ERR(wr)) |
| 2719 | return PTR_ERR(wr); |
| 2720 | |
| 2721 | qp = idr_read_qp(cmd.qp_handle, file->ucontext); |
| 2722 | if (!qp) |
| 2723 | goto out; |
| 2724 | |
| 2725 | resp.bad_wr = 0; |
| 2726 | ret = qp->device->post_recv(qp->real_qp, wr, &bad_wr); |
| 2727 | |
| 2728 | put_qp_read(qp); |
| 2729 | |
| 2730 | if (ret) |
| 2731 | for (next = wr; next; next = next->next) { |
| 2732 | ++resp.bad_wr; |
| 2733 | if (next == bad_wr) |
| 2734 | break; |
| 2735 | } |
| 2736 | |
| 2737 | if (copy_to_user((void __user *) (unsigned long) cmd.response, |
| 2738 | &resp, sizeof resp)) |
| 2739 | ret = -EFAULT; |
| 2740 | |
| 2741 | out: |
| 2742 | while (wr) { |
| 2743 | next = wr->next; |
| 2744 | kfree(wr); |
| 2745 | wr = next; |
| 2746 | } |
| 2747 | |
| 2748 | return ret ? ret : in_len; |
| 2749 | } |
| 2750 | |
| 2751 | ssize_t ib_uverbs_post_srq_recv(struct ib_uverbs_file *file, |
| 2752 | struct ib_device *ib_dev, |
| 2753 | const char __user *buf, int in_len, |
| 2754 | int out_len) |
| 2755 | { |
| 2756 | struct ib_uverbs_post_srq_recv cmd; |
| 2757 | struct ib_uverbs_post_srq_recv_resp resp; |
| 2758 | struct ib_recv_wr *wr, *next, *bad_wr; |
| 2759 | struct ib_srq *srq; |
| 2760 | ssize_t ret = -EINVAL; |
| 2761 | |
| 2762 | if (copy_from_user(&cmd, buf, sizeof cmd)) |
| 2763 | return -EFAULT; |
| 2764 | |
| 2765 | wr = ib_uverbs_unmarshall_recv(buf + sizeof cmd, |
| 2766 | in_len - sizeof cmd, cmd.wr_count, |
| 2767 | cmd.sge_count, cmd.wqe_size); |
| 2768 | if (IS_ERR(wr)) |
| 2769 | return PTR_ERR(wr); |
| 2770 | |
| 2771 | srq = idr_read_srq(cmd.srq_handle, file->ucontext); |
| 2772 | if (!srq) |
| 2773 | goto out; |
| 2774 | |
| 2775 | resp.bad_wr = 0; |
| 2776 | ret = srq->device->post_srq_recv(srq, wr, &bad_wr); |
| 2777 | |
| 2778 | put_srq_read(srq); |
| 2779 | |
| 2780 | if (ret) |
| 2781 | for (next = wr; next; next = next->next) { |
| 2782 | ++resp.bad_wr; |
| 2783 | if (next == bad_wr) |
| 2784 | break; |
| 2785 | } |
| 2786 | |
| 2787 | if (copy_to_user((void __user *) (unsigned long) cmd.response, |
| 2788 | &resp, sizeof resp)) |
| 2789 | ret = -EFAULT; |
| 2790 | |
| 2791 | out: |
| 2792 | while (wr) { |
| 2793 | next = wr->next; |
| 2794 | kfree(wr); |
| 2795 | wr = next; |
| 2796 | } |
| 2797 | |
| 2798 | return ret ? ret : in_len; |
| 2799 | } |
| 2800 | |
| 2801 | ssize_t ib_uverbs_create_ah(struct ib_uverbs_file *file, |
| 2802 | struct ib_device *ib_dev, |
| 2803 | const char __user *buf, int in_len, |
| 2804 | int out_len) |
| 2805 | { |
| 2806 | struct ib_uverbs_create_ah cmd; |
| 2807 | struct ib_uverbs_create_ah_resp resp; |
| 2808 | struct ib_uobject *uobj; |
| 2809 | struct ib_pd *pd; |
| 2810 | struct ib_ah *ah; |
| 2811 | struct ib_ah_attr attr; |
| 2812 | int ret; |
| 2813 | |
| 2814 | if (out_len < sizeof resp) |
| 2815 | return -ENOSPC; |
| 2816 | |
| 2817 | if (copy_from_user(&cmd, buf, sizeof cmd)) |
| 2818 | return -EFAULT; |
| 2819 | |
| 2820 | uobj = kmalloc(sizeof *uobj, GFP_KERNEL); |
| 2821 | if (!uobj) |
| 2822 | return -ENOMEM; |
| 2823 | |
| 2824 | init_uobj(uobj, cmd.user_handle, file->ucontext, &ah_lock_class); |
| 2825 | down_write(&uobj->mutex); |
| 2826 | |
| 2827 | pd = idr_read_pd(cmd.pd_handle, file->ucontext); |
| 2828 | if (!pd) { |
| 2829 | ret = -EINVAL; |
| 2830 | goto err; |
| 2831 | } |
| 2832 | |
| 2833 | attr.dlid = cmd.attr.dlid; |
| 2834 | attr.sl = cmd.attr.sl; |
| 2835 | attr.src_path_bits = cmd.attr.src_path_bits; |
| 2836 | attr.static_rate = cmd.attr.static_rate; |
| 2837 | attr.ah_flags = cmd.attr.is_global ? IB_AH_GRH : 0; |
| 2838 | attr.port_num = cmd.attr.port_num; |
| 2839 | attr.grh.flow_label = cmd.attr.grh.flow_label; |
| 2840 | attr.grh.sgid_index = cmd.attr.grh.sgid_index; |
| 2841 | attr.grh.hop_limit = cmd.attr.grh.hop_limit; |
| 2842 | attr.grh.traffic_class = cmd.attr.grh.traffic_class; |
| 2843 | memset(&attr.dmac, 0, sizeof(attr.dmac)); |
| 2844 | memcpy(attr.grh.dgid.raw, cmd.attr.grh.dgid, 16); |
| 2845 | |
| 2846 | ah = ib_create_ah(pd, &attr); |
| 2847 | if (IS_ERR(ah)) { |
| 2848 | ret = PTR_ERR(ah); |
| 2849 | goto err_put; |
| 2850 | } |
| 2851 | |
| 2852 | ah->uobject = uobj; |
| 2853 | uobj->object = ah; |
| 2854 | |
| 2855 | ret = idr_add_uobj(&ib_uverbs_ah_idr, uobj); |
| 2856 | if (ret) |
| 2857 | goto err_destroy; |
| 2858 | |
| 2859 | resp.ah_handle = uobj->id; |
| 2860 | |
| 2861 | if (copy_to_user((void __user *) (unsigned long) cmd.response, |
| 2862 | &resp, sizeof resp)) { |
| 2863 | ret = -EFAULT; |
| 2864 | goto err_copy; |
| 2865 | } |
| 2866 | |
| 2867 | put_pd_read(pd); |
| 2868 | |
| 2869 | mutex_lock(&file->mutex); |
| 2870 | list_add_tail(&uobj->list, &file->ucontext->ah_list); |
| 2871 | mutex_unlock(&file->mutex); |
| 2872 | |
| 2873 | uobj->live = 1; |
| 2874 | |
| 2875 | up_write(&uobj->mutex); |
| 2876 | |
| 2877 | return in_len; |
| 2878 | |
| 2879 | err_copy: |
| 2880 | idr_remove_uobj(&ib_uverbs_ah_idr, uobj); |
| 2881 | |
| 2882 | err_destroy: |
| 2883 | ib_destroy_ah(ah); |
| 2884 | |
| 2885 | err_put: |
| 2886 | put_pd_read(pd); |
| 2887 | |
| 2888 | err: |
| 2889 | put_uobj_write(uobj); |
| 2890 | return ret; |
| 2891 | } |
| 2892 | |
| 2893 | ssize_t ib_uverbs_destroy_ah(struct ib_uverbs_file *file, |
| 2894 | struct ib_device *ib_dev, |
| 2895 | const char __user *buf, int in_len, int out_len) |
| 2896 | { |
| 2897 | struct ib_uverbs_destroy_ah cmd; |
| 2898 | struct ib_ah *ah; |
| 2899 | struct ib_uobject *uobj; |
| 2900 | int ret; |
| 2901 | |
| 2902 | if (copy_from_user(&cmd, buf, sizeof cmd)) |
| 2903 | return -EFAULT; |
| 2904 | |
| 2905 | uobj = idr_write_uobj(&ib_uverbs_ah_idr, cmd.ah_handle, file->ucontext); |
| 2906 | if (!uobj) |
| 2907 | return -EINVAL; |
| 2908 | ah = uobj->object; |
| 2909 | |
| 2910 | ret = ib_destroy_ah(ah); |
| 2911 | if (!ret) |
| 2912 | uobj->live = 0; |
| 2913 | |
| 2914 | put_uobj_write(uobj); |
| 2915 | |
| 2916 | if (ret) |
| 2917 | return ret; |
| 2918 | |
| 2919 | idr_remove_uobj(&ib_uverbs_ah_idr, uobj); |
| 2920 | |
| 2921 | mutex_lock(&file->mutex); |
| 2922 | list_del(&uobj->list); |
| 2923 | mutex_unlock(&file->mutex); |
| 2924 | |
| 2925 | put_uobj(uobj); |
| 2926 | |
| 2927 | return in_len; |
| 2928 | } |
| 2929 | |
| 2930 | ssize_t ib_uverbs_attach_mcast(struct ib_uverbs_file *file, |
| 2931 | struct ib_device *ib_dev, |
| 2932 | const char __user *buf, int in_len, |
| 2933 | int out_len) |
| 2934 | { |
| 2935 | struct ib_uverbs_attach_mcast cmd; |
| 2936 | struct ib_qp *qp; |
| 2937 | struct ib_uqp_object *obj; |
| 2938 | struct ib_uverbs_mcast_entry *mcast; |
| 2939 | int ret; |
| 2940 | |
| 2941 | if (copy_from_user(&cmd, buf, sizeof cmd)) |
| 2942 | return -EFAULT; |
| 2943 | |
| 2944 | qp = idr_write_qp(cmd.qp_handle, file->ucontext); |
| 2945 | if (!qp) |
| 2946 | return -EINVAL; |
| 2947 | |
| 2948 | obj = container_of(qp->uobject, struct ib_uqp_object, uevent.uobject); |
| 2949 | |
| 2950 | list_for_each_entry(mcast, &obj->mcast_list, list) |
| 2951 | if (cmd.mlid == mcast->lid && |
| 2952 | !memcmp(cmd.gid, mcast->gid.raw, sizeof mcast->gid.raw)) { |
| 2953 | ret = 0; |
| 2954 | goto out_put; |
| 2955 | } |
| 2956 | |
| 2957 | mcast = kmalloc(sizeof *mcast, GFP_KERNEL); |
| 2958 | if (!mcast) { |
| 2959 | ret = -ENOMEM; |
| 2960 | goto out_put; |
| 2961 | } |
| 2962 | |
| 2963 | mcast->lid = cmd.mlid; |
| 2964 | memcpy(mcast->gid.raw, cmd.gid, sizeof mcast->gid.raw); |
| 2965 | |
| 2966 | ret = ib_attach_mcast(qp, &mcast->gid, cmd.mlid); |
| 2967 | if (!ret) |
| 2968 | list_add_tail(&mcast->list, &obj->mcast_list); |
| 2969 | else |
| 2970 | kfree(mcast); |
| 2971 | |
| 2972 | out_put: |
| 2973 | put_qp_write(qp); |
| 2974 | |
| 2975 | return ret ? ret : in_len; |
| 2976 | } |
| 2977 | |
| 2978 | ssize_t ib_uverbs_detach_mcast(struct ib_uverbs_file *file, |
| 2979 | struct ib_device *ib_dev, |
| 2980 | const char __user *buf, int in_len, |
| 2981 | int out_len) |
| 2982 | { |
| 2983 | struct ib_uverbs_detach_mcast cmd; |
| 2984 | struct ib_uqp_object *obj; |
| 2985 | struct ib_qp *qp; |
| 2986 | struct ib_uverbs_mcast_entry *mcast; |
| 2987 | int ret = -EINVAL; |
| 2988 | |
| 2989 | if (copy_from_user(&cmd, buf, sizeof cmd)) |
| 2990 | return -EFAULT; |
| 2991 | |
| 2992 | qp = idr_write_qp(cmd.qp_handle, file->ucontext); |
| 2993 | if (!qp) |
| 2994 | return -EINVAL; |
| 2995 | |
| 2996 | ret = ib_detach_mcast(qp, (union ib_gid *) cmd.gid, cmd.mlid); |
| 2997 | if (ret) |
| 2998 | goto out_put; |
| 2999 | |
| 3000 | obj = container_of(qp->uobject, struct ib_uqp_object, uevent.uobject); |
| 3001 | |
| 3002 | list_for_each_entry(mcast, &obj->mcast_list, list) |
| 3003 | if (cmd.mlid == mcast->lid && |
| 3004 | !memcmp(cmd.gid, mcast->gid.raw, sizeof mcast->gid.raw)) { |
| 3005 | list_del(&mcast->list); |
| 3006 | kfree(mcast); |
| 3007 | break; |
| 3008 | } |
| 3009 | |
| 3010 | out_put: |
| 3011 | put_qp_write(qp); |
| 3012 | |
| 3013 | return ret ? ret : in_len; |
| 3014 | } |
| 3015 | |
| 3016 | static int kern_spec_to_ib_spec(struct ib_uverbs_flow_spec *kern_spec, |
| 3017 | union ib_flow_spec *ib_spec) |
| 3018 | { |
| 3019 | if (kern_spec->reserved) |
| 3020 | return -EINVAL; |
| 3021 | |
| 3022 | ib_spec->type = kern_spec->type; |
| 3023 | |
| 3024 | switch (ib_spec->type) { |
| 3025 | case IB_FLOW_SPEC_ETH: |
| 3026 | ib_spec->eth.size = sizeof(struct ib_flow_spec_eth); |
| 3027 | if (ib_spec->eth.size != kern_spec->eth.size) |
| 3028 | return -EINVAL; |
| 3029 | memcpy(&ib_spec->eth.val, &kern_spec->eth.val, |
| 3030 | sizeof(struct ib_flow_eth_filter)); |
| 3031 | memcpy(&ib_spec->eth.mask, &kern_spec->eth.mask, |
| 3032 | sizeof(struct ib_flow_eth_filter)); |
| 3033 | break; |
| 3034 | case IB_FLOW_SPEC_IPV4: |
| 3035 | ib_spec->ipv4.size = sizeof(struct ib_flow_spec_ipv4); |
| 3036 | if (ib_spec->ipv4.size != kern_spec->ipv4.size) |
| 3037 | return -EINVAL; |
| 3038 | memcpy(&ib_spec->ipv4.val, &kern_spec->ipv4.val, |
| 3039 | sizeof(struct ib_flow_ipv4_filter)); |
| 3040 | memcpy(&ib_spec->ipv4.mask, &kern_spec->ipv4.mask, |
| 3041 | sizeof(struct ib_flow_ipv4_filter)); |
| 3042 | break; |
| 3043 | case IB_FLOW_SPEC_TCP: |
| 3044 | case IB_FLOW_SPEC_UDP: |
| 3045 | ib_spec->tcp_udp.size = sizeof(struct ib_flow_spec_tcp_udp); |
| 3046 | if (ib_spec->tcp_udp.size != kern_spec->tcp_udp.size) |
| 3047 | return -EINVAL; |
| 3048 | memcpy(&ib_spec->tcp_udp.val, &kern_spec->tcp_udp.val, |
| 3049 | sizeof(struct ib_flow_tcp_udp_filter)); |
| 3050 | memcpy(&ib_spec->tcp_udp.mask, &kern_spec->tcp_udp.mask, |
| 3051 | sizeof(struct ib_flow_tcp_udp_filter)); |
| 3052 | break; |
| 3053 | default: |
| 3054 | return -EINVAL; |
| 3055 | } |
| 3056 | return 0; |
| 3057 | } |
| 3058 | |
| 3059 | int ib_uverbs_ex_create_flow(struct ib_uverbs_file *file, |
| 3060 | struct ib_device *ib_dev, |
| 3061 | struct ib_udata *ucore, |
| 3062 | struct ib_udata *uhw) |
| 3063 | { |
| 3064 | struct ib_uverbs_create_flow cmd; |
| 3065 | struct ib_uverbs_create_flow_resp resp; |
| 3066 | struct ib_uobject *uobj; |
| 3067 | struct ib_flow *flow_id; |
| 3068 | struct ib_uverbs_flow_attr *kern_flow_attr; |
| 3069 | struct ib_flow_attr *flow_attr; |
| 3070 | struct ib_qp *qp; |
| 3071 | int err = 0; |
| 3072 | void *kern_spec; |
| 3073 | void *ib_spec; |
| 3074 | int i; |
| 3075 | |
| 3076 | if (ucore->inlen < sizeof(cmd)) |
| 3077 | return -EINVAL; |
| 3078 | |
| 3079 | if (ucore->outlen < sizeof(resp)) |
| 3080 | return -ENOSPC; |
| 3081 | |
| 3082 | err = ib_copy_from_udata(&cmd, ucore, sizeof(cmd)); |
| 3083 | if (err) |
| 3084 | return err; |
| 3085 | |
| 3086 | ucore->inbuf += sizeof(cmd); |
| 3087 | ucore->inlen -= sizeof(cmd); |
| 3088 | |
| 3089 | if (cmd.comp_mask) |
| 3090 | return -EINVAL; |
| 3091 | |
| 3092 | if (!capable(CAP_NET_RAW)) |
| 3093 | return -EPERM; |
| 3094 | |
| 3095 | if (cmd.flow_attr.flags >= IB_FLOW_ATTR_FLAGS_RESERVED) |
| 3096 | return -EINVAL; |
| 3097 | |
| 3098 | if ((cmd.flow_attr.flags & IB_FLOW_ATTR_FLAGS_DONT_TRAP) && |
| 3099 | ((cmd.flow_attr.type == IB_FLOW_ATTR_ALL_DEFAULT) || |
| 3100 | (cmd.flow_attr.type == IB_FLOW_ATTR_MC_DEFAULT))) |
| 3101 | return -EINVAL; |
| 3102 | |
| 3103 | if (cmd.flow_attr.num_of_specs > IB_FLOW_SPEC_SUPPORT_LAYERS) |
| 3104 | return -EINVAL; |
| 3105 | |
| 3106 | if (cmd.flow_attr.size > ucore->inlen || |
| 3107 | cmd.flow_attr.size > |
| 3108 | (cmd.flow_attr.num_of_specs * sizeof(struct ib_uverbs_flow_spec))) |
| 3109 | return -EINVAL; |
| 3110 | |
| 3111 | if (cmd.flow_attr.reserved[0] || |
| 3112 | cmd.flow_attr.reserved[1]) |
| 3113 | return -EINVAL; |
| 3114 | |
| 3115 | if (cmd.flow_attr.num_of_specs) { |
| 3116 | kern_flow_attr = kmalloc(sizeof(*kern_flow_attr) + cmd.flow_attr.size, |
| 3117 | GFP_KERNEL); |
| 3118 | if (!kern_flow_attr) |
| 3119 | return -ENOMEM; |
| 3120 | |
| 3121 | memcpy(kern_flow_attr, &cmd.flow_attr, sizeof(*kern_flow_attr)); |
| 3122 | err = ib_copy_from_udata(kern_flow_attr + 1, ucore, |
| 3123 | cmd.flow_attr.size); |
| 3124 | if (err) |
| 3125 | goto err_free_attr; |
| 3126 | } else { |
| 3127 | kern_flow_attr = &cmd.flow_attr; |
| 3128 | } |
| 3129 | |
| 3130 | uobj = kmalloc(sizeof(*uobj), GFP_KERNEL); |
| 3131 | if (!uobj) { |
| 3132 | err = -ENOMEM; |
| 3133 | goto err_free_attr; |
| 3134 | } |
| 3135 | init_uobj(uobj, 0, file->ucontext, &rule_lock_class); |
| 3136 | down_write(&uobj->mutex); |
| 3137 | |
| 3138 | qp = idr_read_qp(cmd.qp_handle, file->ucontext); |
| 3139 | if (!qp) { |
| 3140 | err = -EINVAL; |
| 3141 | goto err_uobj; |
| 3142 | } |
| 3143 | |
| 3144 | flow_attr = kmalloc(sizeof(*flow_attr) + cmd.flow_attr.size, GFP_KERNEL); |
| 3145 | if (!flow_attr) { |
| 3146 | err = -ENOMEM; |
| 3147 | goto err_put; |
| 3148 | } |
| 3149 | |
| 3150 | flow_attr->type = kern_flow_attr->type; |
| 3151 | flow_attr->priority = kern_flow_attr->priority; |
| 3152 | flow_attr->num_of_specs = kern_flow_attr->num_of_specs; |
| 3153 | flow_attr->port = kern_flow_attr->port; |
| 3154 | flow_attr->flags = kern_flow_attr->flags; |
| 3155 | flow_attr->size = sizeof(*flow_attr); |
| 3156 | |
| 3157 | kern_spec = kern_flow_attr + 1; |
| 3158 | ib_spec = flow_attr + 1; |
| 3159 | for (i = 0; i < flow_attr->num_of_specs && |
| 3160 | cmd.flow_attr.size > offsetof(struct ib_uverbs_flow_spec, reserved) && |
| 3161 | cmd.flow_attr.size >= |
| 3162 | ((struct ib_uverbs_flow_spec *)kern_spec)->size; i++) { |
| 3163 | err = kern_spec_to_ib_spec(kern_spec, ib_spec); |
| 3164 | if (err) |
| 3165 | goto err_free; |
| 3166 | flow_attr->size += |
| 3167 | ((union ib_flow_spec *) ib_spec)->size; |
| 3168 | cmd.flow_attr.size -= ((struct ib_uverbs_flow_spec *)kern_spec)->size; |
| 3169 | kern_spec += ((struct ib_uverbs_flow_spec *) kern_spec)->size; |
| 3170 | ib_spec += ((union ib_flow_spec *) ib_spec)->size; |
| 3171 | } |
| 3172 | if (cmd.flow_attr.size || (i != flow_attr->num_of_specs)) { |
| 3173 | pr_warn("create flow failed, flow %d: %d bytes left from uverb cmd\n", |
| 3174 | i, cmd.flow_attr.size); |
| 3175 | err = -EINVAL; |
| 3176 | goto err_free; |
| 3177 | } |
| 3178 | flow_id = ib_create_flow(qp, flow_attr, IB_FLOW_DOMAIN_USER); |
| 3179 | if (IS_ERR(flow_id)) { |
| 3180 | err = PTR_ERR(flow_id); |
| 3181 | goto err_free; |
| 3182 | } |
| 3183 | flow_id->qp = qp; |
| 3184 | flow_id->uobject = uobj; |
| 3185 | uobj->object = flow_id; |
| 3186 | |
| 3187 | err = idr_add_uobj(&ib_uverbs_rule_idr, uobj); |
| 3188 | if (err) |
| 3189 | goto destroy_flow; |
| 3190 | |
| 3191 | memset(&resp, 0, sizeof(resp)); |
| 3192 | resp.flow_handle = uobj->id; |
| 3193 | |
| 3194 | err = ib_copy_to_udata(ucore, |
| 3195 | &resp, sizeof(resp)); |
| 3196 | if (err) |
| 3197 | goto err_copy; |
| 3198 | |
| 3199 | put_qp_read(qp); |
| 3200 | mutex_lock(&file->mutex); |
| 3201 | list_add_tail(&uobj->list, &file->ucontext->rule_list); |
| 3202 | mutex_unlock(&file->mutex); |
| 3203 | |
| 3204 | uobj->live = 1; |
| 3205 | |
| 3206 | up_write(&uobj->mutex); |
| 3207 | kfree(flow_attr); |
| 3208 | if (cmd.flow_attr.num_of_specs) |
| 3209 | kfree(kern_flow_attr); |
| 3210 | return 0; |
| 3211 | err_copy: |
| 3212 | idr_remove_uobj(&ib_uverbs_rule_idr, uobj); |
| 3213 | destroy_flow: |
| 3214 | ib_destroy_flow(flow_id); |
| 3215 | err_free: |
| 3216 | kfree(flow_attr); |
| 3217 | err_put: |
| 3218 | put_qp_read(qp); |
| 3219 | err_uobj: |
| 3220 | put_uobj_write(uobj); |
| 3221 | err_free_attr: |
| 3222 | if (cmd.flow_attr.num_of_specs) |
| 3223 | kfree(kern_flow_attr); |
| 3224 | return err; |
| 3225 | } |
| 3226 | |
| 3227 | int ib_uverbs_ex_destroy_flow(struct ib_uverbs_file *file, |
| 3228 | struct ib_device *ib_dev, |
| 3229 | struct ib_udata *ucore, |
| 3230 | struct ib_udata *uhw) |
| 3231 | { |
| 3232 | struct ib_uverbs_destroy_flow cmd; |
| 3233 | struct ib_flow *flow_id; |
| 3234 | struct ib_uobject *uobj; |
| 3235 | int ret; |
| 3236 | |
| 3237 | if (ucore->inlen < sizeof(cmd)) |
| 3238 | return -EINVAL; |
| 3239 | |
| 3240 | ret = ib_copy_from_udata(&cmd, ucore, sizeof(cmd)); |
| 3241 | if (ret) |
| 3242 | return ret; |
| 3243 | |
| 3244 | if (cmd.comp_mask) |
| 3245 | return -EINVAL; |
| 3246 | |
| 3247 | uobj = idr_write_uobj(&ib_uverbs_rule_idr, cmd.flow_handle, |
| 3248 | file->ucontext); |
| 3249 | if (!uobj) |
| 3250 | return -EINVAL; |
| 3251 | flow_id = uobj->object; |
| 3252 | |
| 3253 | ret = ib_destroy_flow(flow_id); |
| 3254 | if (!ret) |
| 3255 | uobj->live = 0; |
| 3256 | |
| 3257 | put_uobj_write(uobj); |
| 3258 | |
| 3259 | idr_remove_uobj(&ib_uverbs_rule_idr, uobj); |
| 3260 | |
| 3261 | mutex_lock(&file->mutex); |
| 3262 | list_del(&uobj->list); |
| 3263 | mutex_unlock(&file->mutex); |
| 3264 | |
| 3265 | put_uobj(uobj); |
| 3266 | |
| 3267 | return ret; |
| 3268 | } |
| 3269 | |
| 3270 | static int __uverbs_create_xsrq(struct ib_uverbs_file *file, |
| 3271 | struct ib_device *ib_dev, |
| 3272 | struct ib_uverbs_create_xsrq *cmd, |
| 3273 | struct ib_udata *udata) |
| 3274 | { |
| 3275 | struct ib_uverbs_create_srq_resp resp; |
| 3276 | struct ib_usrq_object *obj; |
| 3277 | struct ib_pd *pd; |
| 3278 | struct ib_srq *srq; |
| 3279 | struct ib_uobject *uninitialized_var(xrcd_uobj); |
| 3280 | struct ib_srq_init_attr attr; |
| 3281 | int ret; |
| 3282 | |
| 3283 | obj = kmalloc(sizeof *obj, GFP_KERNEL); |
| 3284 | if (!obj) |
| 3285 | return -ENOMEM; |
| 3286 | |
| 3287 | init_uobj(&obj->uevent.uobject, cmd->user_handle, file->ucontext, &srq_lock_class); |
| 3288 | down_write(&obj->uevent.uobject.mutex); |
| 3289 | |
| 3290 | if (cmd->srq_type == IB_SRQT_XRC) { |
| 3291 | attr.ext.xrc.xrcd = idr_read_xrcd(cmd->xrcd_handle, file->ucontext, &xrcd_uobj); |
| 3292 | if (!attr.ext.xrc.xrcd) { |
| 3293 | ret = -EINVAL; |
| 3294 | goto err; |
| 3295 | } |
| 3296 | |
| 3297 | obj->uxrcd = container_of(xrcd_uobj, struct ib_uxrcd_object, uobject); |
| 3298 | atomic_inc(&obj->uxrcd->refcnt); |
| 3299 | |
| 3300 | attr.ext.xrc.cq = idr_read_cq(cmd->cq_handle, file->ucontext, 0); |
| 3301 | if (!attr.ext.xrc.cq) { |
| 3302 | ret = -EINVAL; |
| 3303 | goto err_put_xrcd; |
| 3304 | } |
| 3305 | } |
| 3306 | |
| 3307 | pd = idr_read_pd(cmd->pd_handle, file->ucontext); |
| 3308 | if (!pd) { |
| 3309 | ret = -EINVAL; |
| 3310 | goto err_put_cq; |
| 3311 | } |
| 3312 | |
| 3313 | attr.event_handler = ib_uverbs_srq_event_handler; |
| 3314 | attr.srq_context = file; |
| 3315 | attr.srq_type = cmd->srq_type; |
| 3316 | attr.attr.max_wr = cmd->max_wr; |
| 3317 | attr.attr.max_sge = cmd->max_sge; |
| 3318 | attr.attr.srq_limit = cmd->srq_limit; |
| 3319 | |
| 3320 | obj->uevent.events_reported = 0; |
| 3321 | INIT_LIST_HEAD(&obj->uevent.event_list); |
| 3322 | |
| 3323 | srq = pd->device->create_srq(pd, &attr, udata); |
| 3324 | if (IS_ERR(srq)) { |
| 3325 | ret = PTR_ERR(srq); |
| 3326 | goto err_put; |
| 3327 | } |
| 3328 | |
| 3329 | srq->device = pd->device; |
| 3330 | srq->pd = pd; |
| 3331 | srq->srq_type = cmd->srq_type; |
| 3332 | srq->uobject = &obj->uevent.uobject; |
| 3333 | srq->event_handler = attr.event_handler; |
| 3334 | srq->srq_context = attr.srq_context; |
| 3335 | |
| 3336 | if (cmd->srq_type == IB_SRQT_XRC) { |
| 3337 | srq->ext.xrc.cq = attr.ext.xrc.cq; |
| 3338 | srq->ext.xrc.xrcd = attr.ext.xrc.xrcd; |
| 3339 | atomic_inc(&attr.ext.xrc.cq->usecnt); |
| 3340 | atomic_inc(&attr.ext.xrc.xrcd->usecnt); |
| 3341 | } |
| 3342 | |
| 3343 | atomic_inc(&pd->usecnt); |
| 3344 | atomic_set(&srq->usecnt, 0); |
| 3345 | |
| 3346 | obj->uevent.uobject.object = srq; |
| 3347 | ret = idr_add_uobj(&ib_uverbs_srq_idr, &obj->uevent.uobject); |
| 3348 | if (ret) |
| 3349 | goto err_destroy; |
| 3350 | |
| 3351 | memset(&resp, 0, sizeof resp); |
| 3352 | resp.srq_handle = obj->uevent.uobject.id; |
| 3353 | resp.max_wr = attr.attr.max_wr; |
| 3354 | resp.max_sge = attr.attr.max_sge; |
| 3355 | if (cmd->srq_type == IB_SRQT_XRC) |
| 3356 | resp.srqn = srq->ext.xrc.srq_num; |
| 3357 | |
| 3358 | if (copy_to_user((void __user *) (unsigned long) cmd->response, |
| 3359 | &resp, sizeof resp)) { |
| 3360 | ret = -EFAULT; |
| 3361 | goto err_copy; |
| 3362 | } |
| 3363 | |
| 3364 | if (cmd->srq_type == IB_SRQT_XRC) { |
| 3365 | put_uobj_read(xrcd_uobj); |
| 3366 | put_cq_read(attr.ext.xrc.cq); |
| 3367 | } |
| 3368 | put_pd_read(pd); |
| 3369 | |
| 3370 | mutex_lock(&file->mutex); |
| 3371 | list_add_tail(&obj->uevent.uobject.list, &file->ucontext->srq_list); |
| 3372 | mutex_unlock(&file->mutex); |
| 3373 | |
| 3374 | obj->uevent.uobject.live = 1; |
| 3375 | |
| 3376 | up_write(&obj->uevent.uobject.mutex); |
| 3377 | |
| 3378 | return 0; |
| 3379 | |
| 3380 | err_copy: |
| 3381 | idr_remove_uobj(&ib_uverbs_srq_idr, &obj->uevent.uobject); |
| 3382 | |
| 3383 | err_destroy: |
| 3384 | ib_destroy_srq(srq); |
| 3385 | |
| 3386 | err_put: |
| 3387 | put_pd_read(pd); |
| 3388 | |
| 3389 | err_put_cq: |
| 3390 | if (cmd->srq_type == IB_SRQT_XRC) |
| 3391 | put_cq_read(attr.ext.xrc.cq); |
| 3392 | |
| 3393 | err_put_xrcd: |
| 3394 | if (cmd->srq_type == IB_SRQT_XRC) { |
| 3395 | atomic_dec(&obj->uxrcd->refcnt); |
| 3396 | put_uobj_read(xrcd_uobj); |
| 3397 | } |
| 3398 | |
| 3399 | err: |
| 3400 | put_uobj_write(&obj->uevent.uobject); |
| 3401 | return ret; |
| 3402 | } |
| 3403 | |
| 3404 | ssize_t ib_uverbs_create_srq(struct ib_uverbs_file *file, |
| 3405 | struct ib_device *ib_dev, |
| 3406 | const char __user *buf, int in_len, |
| 3407 | int out_len) |
| 3408 | { |
| 3409 | struct ib_uverbs_create_srq cmd; |
| 3410 | struct ib_uverbs_create_xsrq xcmd; |
| 3411 | struct ib_uverbs_create_srq_resp resp; |
| 3412 | struct ib_udata udata; |
| 3413 | int ret; |
| 3414 | |
| 3415 | if (out_len < sizeof resp) |
| 3416 | return -ENOSPC; |
| 3417 | |
| 3418 | if (copy_from_user(&cmd, buf, sizeof cmd)) |
| 3419 | return -EFAULT; |
| 3420 | |
| 3421 | xcmd.response = cmd.response; |
| 3422 | xcmd.user_handle = cmd.user_handle; |
| 3423 | xcmd.srq_type = IB_SRQT_BASIC; |
| 3424 | xcmd.pd_handle = cmd.pd_handle; |
| 3425 | xcmd.max_wr = cmd.max_wr; |
| 3426 | xcmd.max_sge = cmd.max_sge; |
| 3427 | xcmd.srq_limit = cmd.srq_limit; |
| 3428 | |
| 3429 | INIT_UDATA(&udata, buf + sizeof cmd, |
| 3430 | (unsigned long) cmd.response + sizeof resp, |
| 3431 | in_len - sizeof cmd - sizeof(struct ib_uverbs_cmd_hdr), |
| 3432 | out_len - sizeof resp); |
| 3433 | |
| 3434 | ret = __uverbs_create_xsrq(file, ib_dev, &xcmd, &udata); |
| 3435 | if (ret) |
| 3436 | return ret; |
| 3437 | |
| 3438 | return in_len; |
| 3439 | } |
| 3440 | |
| 3441 | ssize_t ib_uverbs_create_xsrq(struct ib_uverbs_file *file, |
| 3442 | struct ib_device *ib_dev, |
| 3443 | const char __user *buf, int in_len, int out_len) |
| 3444 | { |
| 3445 | struct ib_uverbs_create_xsrq cmd; |
| 3446 | struct ib_uverbs_create_srq_resp resp; |
| 3447 | struct ib_udata udata; |
| 3448 | int ret; |
| 3449 | |
| 3450 | if (out_len < sizeof resp) |
| 3451 | return -ENOSPC; |
| 3452 | |
| 3453 | if (copy_from_user(&cmd, buf, sizeof cmd)) |
| 3454 | return -EFAULT; |
| 3455 | |
| 3456 | INIT_UDATA(&udata, buf + sizeof cmd, |
| 3457 | (unsigned long) cmd.response + sizeof resp, |
| 3458 | in_len - sizeof cmd - sizeof(struct ib_uverbs_cmd_hdr), |
| 3459 | out_len - sizeof resp); |
| 3460 | |
| 3461 | ret = __uverbs_create_xsrq(file, ib_dev, &cmd, &udata); |
| 3462 | if (ret) |
| 3463 | return ret; |
| 3464 | |
| 3465 | return in_len; |
| 3466 | } |
| 3467 | |
| 3468 | ssize_t ib_uverbs_modify_srq(struct ib_uverbs_file *file, |
| 3469 | struct ib_device *ib_dev, |
| 3470 | const char __user *buf, int in_len, |
| 3471 | int out_len) |
| 3472 | { |
| 3473 | struct ib_uverbs_modify_srq cmd; |
| 3474 | struct ib_udata udata; |
| 3475 | struct ib_srq *srq; |
| 3476 | struct ib_srq_attr attr; |
| 3477 | int ret; |
| 3478 | |
| 3479 | if (copy_from_user(&cmd, buf, sizeof cmd)) |
| 3480 | return -EFAULT; |
| 3481 | |
| 3482 | INIT_UDATA(&udata, buf + sizeof cmd, NULL, in_len - sizeof cmd, |
| 3483 | out_len); |
| 3484 | |
| 3485 | srq = idr_read_srq(cmd.srq_handle, file->ucontext); |
| 3486 | if (!srq) |
| 3487 | return -EINVAL; |
| 3488 | |
| 3489 | attr.max_wr = cmd.max_wr; |
| 3490 | attr.srq_limit = cmd.srq_limit; |
| 3491 | |
| 3492 | ret = srq->device->modify_srq(srq, &attr, cmd.attr_mask, &udata); |
| 3493 | |
| 3494 | put_srq_read(srq); |
| 3495 | |
| 3496 | return ret ? ret : in_len; |
| 3497 | } |
| 3498 | |
| 3499 | ssize_t ib_uverbs_query_srq(struct ib_uverbs_file *file, |
| 3500 | struct ib_device *ib_dev, |
| 3501 | const char __user *buf, |
| 3502 | int in_len, int out_len) |
| 3503 | { |
| 3504 | struct ib_uverbs_query_srq cmd; |
| 3505 | struct ib_uverbs_query_srq_resp resp; |
| 3506 | struct ib_srq_attr attr; |
| 3507 | struct ib_srq *srq; |
| 3508 | int ret; |
| 3509 | |
| 3510 | if (out_len < sizeof resp) |
| 3511 | return -ENOSPC; |
| 3512 | |
| 3513 | if (copy_from_user(&cmd, buf, sizeof cmd)) |
| 3514 | return -EFAULT; |
| 3515 | |
| 3516 | srq = idr_read_srq(cmd.srq_handle, file->ucontext); |
| 3517 | if (!srq) |
| 3518 | return -EINVAL; |
| 3519 | |
| 3520 | ret = ib_query_srq(srq, &attr); |
| 3521 | |
| 3522 | put_srq_read(srq); |
| 3523 | |
| 3524 | if (ret) |
| 3525 | return ret; |
| 3526 | |
| 3527 | memset(&resp, 0, sizeof resp); |
| 3528 | |
| 3529 | resp.max_wr = attr.max_wr; |
| 3530 | resp.max_sge = attr.max_sge; |
| 3531 | resp.srq_limit = attr.srq_limit; |
| 3532 | |
| 3533 | if (copy_to_user((void __user *) (unsigned long) cmd.response, |
| 3534 | &resp, sizeof resp)) |
| 3535 | return -EFAULT; |
| 3536 | |
| 3537 | return in_len; |
| 3538 | } |
| 3539 | |
| 3540 | ssize_t ib_uverbs_destroy_srq(struct ib_uverbs_file *file, |
| 3541 | struct ib_device *ib_dev, |
| 3542 | const char __user *buf, int in_len, |
| 3543 | int out_len) |
| 3544 | { |
| 3545 | struct ib_uverbs_destroy_srq cmd; |
| 3546 | struct ib_uverbs_destroy_srq_resp resp; |
| 3547 | struct ib_uobject *uobj; |
| 3548 | struct ib_srq *srq; |
| 3549 | struct ib_uevent_object *obj; |
| 3550 | int ret = -EINVAL; |
| 3551 | struct ib_usrq_object *us; |
| 3552 | enum ib_srq_type srq_type; |
| 3553 | |
| 3554 | if (copy_from_user(&cmd, buf, sizeof cmd)) |
| 3555 | return -EFAULT; |
| 3556 | |
| 3557 | uobj = idr_write_uobj(&ib_uverbs_srq_idr, cmd.srq_handle, file->ucontext); |
| 3558 | if (!uobj) |
| 3559 | return -EINVAL; |
| 3560 | srq = uobj->object; |
| 3561 | obj = container_of(uobj, struct ib_uevent_object, uobject); |
| 3562 | srq_type = srq->srq_type; |
| 3563 | |
| 3564 | ret = ib_destroy_srq(srq); |
| 3565 | if (!ret) |
| 3566 | uobj->live = 0; |
| 3567 | |
| 3568 | put_uobj_write(uobj); |
| 3569 | |
| 3570 | if (ret) |
| 3571 | return ret; |
| 3572 | |
| 3573 | if (srq_type == IB_SRQT_XRC) { |
| 3574 | us = container_of(obj, struct ib_usrq_object, uevent); |
| 3575 | atomic_dec(&us->uxrcd->refcnt); |
| 3576 | } |
| 3577 | |
| 3578 | idr_remove_uobj(&ib_uverbs_srq_idr, uobj); |
| 3579 | |
| 3580 | mutex_lock(&file->mutex); |
| 3581 | list_del(&uobj->list); |
| 3582 | mutex_unlock(&file->mutex); |
| 3583 | |
| 3584 | ib_uverbs_release_uevent(file, obj); |
| 3585 | |
| 3586 | memset(&resp, 0, sizeof resp); |
| 3587 | resp.events_reported = obj->events_reported; |
| 3588 | |
| 3589 | put_uobj(uobj); |
| 3590 | |
| 3591 | if (copy_to_user((void __user *) (unsigned long) cmd.response, |
| 3592 | &resp, sizeof resp)) |
| 3593 | ret = -EFAULT; |
| 3594 | |
| 3595 | return ret ? ret : in_len; |
| 3596 | } |
| 3597 | |
| 3598 | int ib_uverbs_ex_query_device(struct ib_uverbs_file *file, |
| 3599 | struct ib_device *ib_dev, |
| 3600 | struct ib_udata *ucore, |
| 3601 | struct ib_udata *uhw) |
| 3602 | { |
| 3603 | struct ib_uverbs_ex_query_device_resp resp = { {0} }; |
| 3604 | struct ib_uverbs_ex_query_device cmd; |
| 3605 | struct ib_device_attr attr = {0}; |
| 3606 | int err; |
| 3607 | |
| 3608 | if (ucore->inlen < sizeof(cmd)) |
| 3609 | return -EINVAL; |
| 3610 | |
| 3611 | err = ib_copy_from_udata(&cmd, ucore, sizeof(cmd)); |
| 3612 | if (err) |
| 3613 | return err; |
| 3614 | |
| 3615 | if (cmd.comp_mask) |
| 3616 | return -EINVAL; |
| 3617 | |
| 3618 | if (cmd.reserved) |
| 3619 | return -EINVAL; |
| 3620 | |
| 3621 | resp.response_length = offsetof(typeof(resp), odp_caps); |
| 3622 | |
| 3623 | if (ucore->outlen < resp.response_length) |
| 3624 | return -ENOSPC; |
| 3625 | |
| 3626 | err = ib_dev->query_device(ib_dev, &attr, uhw); |
| 3627 | if (err) |
| 3628 | return err; |
| 3629 | |
| 3630 | copy_query_dev_fields(file, ib_dev, &resp.base, &attr); |
| 3631 | |
| 3632 | if (ucore->outlen < resp.response_length + sizeof(resp.odp_caps)) |
| 3633 | goto end; |
| 3634 | |
| 3635 | #ifdef CONFIG_INFINIBAND_ON_DEMAND_PAGING |
| 3636 | resp.odp_caps.general_caps = attr.odp_caps.general_caps; |
| 3637 | resp.odp_caps.per_transport_caps.rc_odp_caps = |
| 3638 | attr.odp_caps.per_transport_caps.rc_odp_caps; |
| 3639 | resp.odp_caps.per_transport_caps.uc_odp_caps = |
| 3640 | attr.odp_caps.per_transport_caps.uc_odp_caps; |
| 3641 | resp.odp_caps.per_transport_caps.ud_odp_caps = |
| 3642 | attr.odp_caps.per_transport_caps.ud_odp_caps; |
| 3643 | #endif |
| 3644 | resp.response_length += sizeof(resp.odp_caps); |
| 3645 | |
| 3646 | if (ucore->outlen < resp.response_length + sizeof(resp.timestamp_mask)) |
| 3647 | goto end; |
| 3648 | |
| 3649 | resp.timestamp_mask = attr.timestamp_mask; |
| 3650 | resp.response_length += sizeof(resp.timestamp_mask); |
| 3651 | |
| 3652 | if (ucore->outlen < resp.response_length + sizeof(resp.hca_core_clock)) |
| 3653 | goto end; |
| 3654 | |
| 3655 | resp.hca_core_clock = attr.hca_core_clock; |
| 3656 | resp.response_length += sizeof(resp.hca_core_clock); |
| 3657 | |
| 3658 | if (ucore->outlen < resp.response_length + sizeof(resp.device_cap_flags_ex)) |
| 3659 | goto end; |
| 3660 | |
| 3661 | resp.device_cap_flags_ex = attr.device_cap_flags; |
| 3662 | resp.response_length += sizeof(resp.device_cap_flags_ex); |
| 3663 | end: |
| 3664 | err = ib_copy_to_udata(ucore, &resp, resp.response_length); |
| 3665 | return err; |
| 3666 | } |