1 // SPDX-License-Identifier: GPL-2.0-or-later 2 /* 3 * Copyright (c) 2016 Mellanox Technologies. All rights reserved. 4 * Copyright (c) 2016 Jiri Pirko <jiri@mellanox.com> 5 */ 6 7 #include <net/genetlink.h> 8 #include <net/sock.h> 9 #include "devl_internal.h" 10 11 struct devlink_info_req { 12 struct sk_buff *msg; 13 void (*version_cb)(const char *version_name, 14 enum devlink_info_version_type version_type, 15 void *version_cb_priv); 16 void *version_cb_priv; 17 }; 18 19 struct devlink_reload_combination { 20 enum devlink_reload_action action; 21 enum devlink_reload_limit limit; 22 }; 23 24 static const struct devlink_reload_combination devlink_reload_invalid_combinations[] = { 25 { 26 /* can't reinitialize driver with no down time */ 27 .action = DEVLINK_RELOAD_ACTION_DRIVER_REINIT, 28 .limit = DEVLINK_RELOAD_LIMIT_NO_RESET, 29 }, 30 }; 31 32 static bool devlink_reload_combination_is_invalid(enum devlink_reload_action action,enum devlink_reload_limit limit)33 devlink_reload_combination_is_invalid(enum devlink_reload_action action, 34 enum devlink_reload_limit limit) 35 { 36 int i; 37 38 for (i = 0; i < ARRAY_SIZE(devlink_reload_invalid_combinations); i++) 39 if (devlink_reload_invalid_combinations[i].action == action && 40 devlink_reload_invalid_combinations[i].limit == limit) 41 return true; 42 return false; 43 } 44 45 static bool devlink_reload_action_is_supported(struct devlink * devlink,enum devlink_reload_action action)46 devlink_reload_action_is_supported(struct devlink *devlink, enum devlink_reload_action action) 47 { 48 return test_bit(action, &devlink->ops->reload_actions); 49 } 50 51 static bool devlink_reload_limit_is_supported(struct devlink * devlink,enum devlink_reload_limit limit)52 devlink_reload_limit_is_supported(struct devlink *devlink, enum devlink_reload_limit limit) 53 { 54 return test_bit(limit, &devlink->ops->reload_limits); 55 } 56 devlink_reload_stat_put(struct sk_buff * msg,enum devlink_reload_limit limit,u32 value)57 static int devlink_reload_stat_put(struct sk_buff *msg, 58 enum devlink_reload_limit limit, u32 value) 59 { 60 struct nlattr *reload_stats_entry; 61 62 reload_stats_entry = nla_nest_start(msg, DEVLINK_ATTR_RELOAD_STATS_ENTRY); 63 if (!reload_stats_entry) 64 return -EMSGSIZE; 65 66 if (nla_put_u8(msg, DEVLINK_ATTR_RELOAD_STATS_LIMIT, limit) || 67 nla_put_u32(msg, DEVLINK_ATTR_RELOAD_STATS_VALUE, value)) 68 goto nla_put_failure; 69 nla_nest_end(msg, reload_stats_entry); 70 return 0; 71 72 nla_put_failure: 73 nla_nest_cancel(msg, reload_stats_entry); 74 return -EMSGSIZE; 75 } 76 77 static int devlink_reload_stats_put(struct sk_buff * msg,struct devlink * devlink,bool is_remote)78 devlink_reload_stats_put(struct sk_buff *msg, struct devlink *devlink, bool is_remote) 79 { 80 struct nlattr *reload_stats_attr, *act_info, *act_stats; 81 int i, j, stat_idx; 82 u32 value; 83 84 if (!is_remote) 85 reload_stats_attr = nla_nest_start(msg, DEVLINK_ATTR_RELOAD_STATS); 86 else 87 reload_stats_attr = nla_nest_start(msg, DEVLINK_ATTR_REMOTE_RELOAD_STATS); 88 89 if (!reload_stats_attr) 90 return -EMSGSIZE; 91 92 for (i = 0; i <= DEVLINK_RELOAD_ACTION_MAX; i++) { 93 if ((!is_remote && 94 !devlink_reload_action_is_supported(devlink, i)) || 95 i == DEVLINK_RELOAD_ACTION_UNSPEC) 96 continue; 97 act_info = nla_nest_start(msg, DEVLINK_ATTR_RELOAD_ACTION_INFO); 98 if (!act_info) 99 goto nla_put_failure; 100 101 if (nla_put_u8(msg, DEVLINK_ATTR_RELOAD_ACTION, i)) 102 goto action_info_nest_cancel; 103 act_stats = nla_nest_start(msg, DEVLINK_ATTR_RELOAD_ACTION_STATS); 104 if (!act_stats) 105 goto action_info_nest_cancel; 106 107 for (j = 0; j <= DEVLINK_RELOAD_LIMIT_MAX; j++) { 108 /* Remote stats are shown even if not locally supported. 109 * Stats of actions with unspecified limit are shown 110 * though drivers don't need to register unspecified 111 * limit. 112 */ 113 if ((!is_remote && j != DEVLINK_RELOAD_LIMIT_UNSPEC && 114 !devlink_reload_limit_is_supported(devlink, j)) || 115 devlink_reload_combination_is_invalid(i, j)) 116 continue; 117 118 stat_idx = j * __DEVLINK_RELOAD_ACTION_MAX + i; 119 if (!is_remote) 120 value = devlink->stats.reload_stats[stat_idx]; 121 else 122 value = devlink->stats.remote_reload_stats[stat_idx]; 123 if (devlink_reload_stat_put(msg, j, value)) 124 goto action_stats_nest_cancel; 125 } 126 nla_nest_end(msg, act_stats); 127 nla_nest_end(msg, act_info); 128 } 129 nla_nest_end(msg, reload_stats_attr); 130 return 0; 131 132 action_stats_nest_cancel: 133 nla_nest_cancel(msg, act_stats); 134 action_info_nest_cancel: 135 nla_nest_cancel(msg, act_info); 136 nla_put_failure: 137 nla_nest_cancel(msg, reload_stats_attr); 138 return -EMSGSIZE; 139 } 140 devlink_nl_fill(struct sk_buff * msg,struct devlink * devlink,enum devlink_command cmd,u32 portid,u32 seq,int flags)141 static int devlink_nl_fill(struct sk_buff *msg, struct devlink *devlink, 142 enum devlink_command cmd, u32 portid, 143 u32 seq, int flags) 144 { 145 struct nlattr *dev_stats; 146 void *hdr; 147 148 hdr = genlmsg_put(msg, portid, seq, &devlink_nl_family, flags, cmd); 149 if (!hdr) 150 return -EMSGSIZE; 151 152 if (devlink_nl_put_handle(msg, devlink)) 153 goto nla_put_failure; 154 if (nla_put_u8(msg, DEVLINK_ATTR_RELOAD_FAILED, devlink->reload_failed)) 155 goto nla_put_failure; 156 157 dev_stats = nla_nest_start(msg, DEVLINK_ATTR_DEV_STATS); 158 if (!dev_stats) 159 goto nla_put_failure; 160 161 if (devlink_reload_stats_put(msg, devlink, false)) 162 goto dev_stats_nest_cancel; 163 if (devlink_reload_stats_put(msg, devlink, true)) 164 goto dev_stats_nest_cancel; 165 166 nla_nest_end(msg, dev_stats); 167 genlmsg_end(msg, hdr); 168 return 0; 169 170 dev_stats_nest_cancel: 171 nla_nest_cancel(msg, dev_stats); 172 nla_put_failure: 173 genlmsg_cancel(msg, hdr); 174 return -EMSGSIZE; 175 } 176 devlink_notify(struct devlink * devlink,enum devlink_command cmd)177 static void devlink_notify(struct devlink *devlink, enum devlink_command cmd) 178 { 179 struct sk_buff *msg; 180 int err; 181 182 WARN_ON(cmd != DEVLINK_CMD_NEW && cmd != DEVLINK_CMD_DEL); 183 WARN_ON(!xa_get_mark(&devlinks, devlink->index, DEVLINK_REGISTERED)); 184 185 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); 186 if (!msg) 187 return; 188 189 err = devlink_nl_fill(msg, devlink, cmd, 0, 0, 0); 190 if (err) { 191 nlmsg_free(msg); 192 return; 193 } 194 195 genlmsg_multicast_netns(&devlink_nl_family, devlink_net(devlink), 196 msg, 0, DEVLINK_MCGRP_CONFIG, GFP_KERNEL); 197 } 198 devlink_nl_get_doit(struct sk_buff * skb,struct genl_info * info)199 int devlink_nl_get_doit(struct sk_buff *skb, struct genl_info *info) 200 { 201 struct devlink *devlink = info->user_ptr[0]; 202 struct sk_buff *msg; 203 int err; 204 205 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); 206 if (!msg) 207 return -ENOMEM; 208 209 err = devlink_nl_fill(msg, devlink, DEVLINK_CMD_NEW, 210 info->snd_portid, info->snd_seq, 0); 211 if (err) { 212 nlmsg_free(msg); 213 return err; 214 } 215 216 return genlmsg_reply(msg, info); 217 } 218 219 static int devlink_nl_get_dump_one(struct sk_buff * msg,struct devlink * devlink,struct netlink_callback * cb,int flags)220 devlink_nl_get_dump_one(struct sk_buff *msg, struct devlink *devlink, 221 struct netlink_callback *cb, int flags) 222 { 223 return devlink_nl_fill(msg, devlink, DEVLINK_CMD_NEW, 224 NETLINK_CB(cb->skb).portid, 225 cb->nlh->nlmsg_seq, flags); 226 } 227 devlink_nl_get_dumpit(struct sk_buff * msg,struct netlink_callback * cb)228 int devlink_nl_get_dumpit(struct sk_buff *msg, struct netlink_callback *cb) 229 { 230 return devlink_nl_dumpit(msg, cb, devlink_nl_get_dump_one); 231 } 232 devlink_notify_register(struct devlink * devlink)233 void devlink_notify_register(struct devlink *devlink) 234 { 235 devlink_notify(devlink, DEVLINK_CMD_NEW); 236 devlink_linecards_notify_register(devlink); 237 devlink_ports_notify_register(devlink); 238 devlink_trap_policers_notify_register(devlink); 239 devlink_trap_groups_notify_register(devlink); 240 devlink_traps_notify_register(devlink); 241 devlink_rates_notify_register(devlink); 242 devlink_regions_notify_register(devlink); 243 devlink_params_notify_register(devlink); 244 } 245 devlink_notify_unregister(struct devlink * devlink)246 void devlink_notify_unregister(struct devlink *devlink) 247 { 248 devlink_params_notify_unregister(devlink); 249 devlink_regions_notify_unregister(devlink); 250 devlink_rates_notify_unregister(devlink); 251 devlink_traps_notify_unregister(devlink); 252 devlink_trap_groups_notify_unregister(devlink); 253 devlink_trap_policers_notify_unregister(devlink); 254 devlink_ports_notify_unregister(devlink); 255 devlink_linecards_notify_unregister(devlink); 256 devlink_notify(devlink, DEVLINK_CMD_DEL); 257 } 258 devlink_reload_failed_set(struct devlink * devlink,bool reload_failed)259 static void devlink_reload_failed_set(struct devlink *devlink, 260 bool reload_failed) 261 { 262 if (devlink->reload_failed == reload_failed) 263 return; 264 devlink->reload_failed = reload_failed; 265 devlink_notify(devlink, DEVLINK_CMD_NEW); 266 } 267 devlink_is_reload_failed(const struct devlink * devlink)268 bool devlink_is_reload_failed(const struct devlink *devlink) 269 { 270 return devlink->reload_failed; 271 } 272 EXPORT_SYMBOL_GPL(devlink_is_reload_failed); 273 274 static void __devlink_reload_stats_update(struct devlink * devlink,u32 * reload_stats,enum devlink_reload_limit limit,u32 actions_performed)275 __devlink_reload_stats_update(struct devlink *devlink, u32 *reload_stats, 276 enum devlink_reload_limit limit, u32 actions_performed) 277 { 278 unsigned long actions = actions_performed; 279 int stat_idx; 280 int action; 281 282 for_each_set_bit(action, &actions, __DEVLINK_RELOAD_ACTION_MAX) { 283 stat_idx = limit * __DEVLINK_RELOAD_ACTION_MAX + action; 284 reload_stats[stat_idx]++; 285 } 286 devlink_notify(devlink, DEVLINK_CMD_NEW); 287 } 288 289 static void devlink_reload_stats_update(struct devlink * devlink,enum devlink_reload_limit limit,u32 actions_performed)290 devlink_reload_stats_update(struct devlink *devlink, enum devlink_reload_limit limit, 291 u32 actions_performed) 292 { 293 __devlink_reload_stats_update(devlink, devlink->stats.reload_stats, limit, 294 actions_performed); 295 } 296 297 /** 298 * devlink_remote_reload_actions_performed - Update devlink on reload actions 299 * performed which are not a direct result of devlink reload call. 300 * 301 * This should be called by a driver after performing reload actions in case it was not 302 * a result of devlink reload call. For example fw_activate was performed as a result 303 * of devlink reload triggered fw_activate on another host. 304 * The motivation for this function is to keep data on reload actions performed on this 305 * function whether it was done due to direct devlink reload call or not. 306 * 307 * @devlink: devlink 308 * @limit: reload limit 309 * @actions_performed: bitmask of actions performed 310 */ devlink_remote_reload_actions_performed(struct devlink * devlink,enum devlink_reload_limit limit,u32 actions_performed)311 void devlink_remote_reload_actions_performed(struct devlink *devlink, 312 enum devlink_reload_limit limit, 313 u32 actions_performed) 314 { 315 if (WARN_ON(!actions_performed || 316 actions_performed & BIT(DEVLINK_RELOAD_ACTION_UNSPEC) || 317 actions_performed >= BIT(__DEVLINK_RELOAD_ACTION_MAX) || 318 limit > DEVLINK_RELOAD_LIMIT_MAX)) 319 return; 320 321 __devlink_reload_stats_update(devlink, devlink->stats.remote_reload_stats, limit, 322 actions_performed); 323 } 324 EXPORT_SYMBOL_GPL(devlink_remote_reload_actions_performed); 325 devlink_netns_get(struct sk_buff * skb,struct genl_info * info)326 static struct net *devlink_netns_get(struct sk_buff *skb, 327 struct genl_info *info) 328 { 329 struct nlattr *netns_pid_attr = info->attrs[DEVLINK_ATTR_NETNS_PID]; 330 struct nlattr *netns_fd_attr = info->attrs[DEVLINK_ATTR_NETNS_FD]; 331 struct nlattr *netns_id_attr = info->attrs[DEVLINK_ATTR_NETNS_ID]; 332 struct net *net; 333 334 if (!!netns_pid_attr + !!netns_fd_attr + !!netns_id_attr > 1) { 335 NL_SET_ERR_MSG(info->extack, "multiple netns identifying attributes specified"); 336 return ERR_PTR(-EINVAL); 337 } 338 339 if (netns_pid_attr) { 340 net = get_net_ns_by_pid(nla_get_u32(netns_pid_attr)); 341 } else if (netns_fd_attr) { 342 net = get_net_ns_by_fd(nla_get_u32(netns_fd_attr)); 343 } else if (netns_id_attr) { 344 net = get_net_ns_by_id(sock_net(skb->sk), 345 nla_get_u32(netns_id_attr)); 346 if (!net) 347 net = ERR_PTR(-EINVAL); 348 } else { 349 WARN_ON(1); 350 net = ERR_PTR(-EINVAL); 351 } 352 if (IS_ERR(net)) { 353 NL_SET_ERR_MSG(info->extack, "Unknown network namespace"); 354 return ERR_PTR(-EINVAL); 355 } 356 if (!netlink_ns_capable(skb, net->user_ns, CAP_NET_ADMIN)) { 357 put_net(net); 358 return ERR_PTR(-EPERM); 359 } 360 return net; 361 } 362 devlink_reload_netns_change(struct devlink * devlink,struct net * curr_net,struct net * dest_net)363 static void devlink_reload_netns_change(struct devlink *devlink, 364 struct net *curr_net, 365 struct net *dest_net) 366 { 367 /* Userspace needs to be notified about devlink objects 368 * removed from original and entering new network namespace. 369 * The rest of the devlink objects are re-created during 370 * reload process so the notifications are generated separatelly. 371 */ 372 devlink_notify_unregister(devlink); 373 write_pnet(&devlink->_net, dest_net); 374 devlink_notify_register(devlink); 375 } 376 devlink_reload(struct devlink * devlink,struct net * dest_net,enum devlink_reload_action action,enum devlink_reload_limit limit,u32 * actions_performed,struct netlink_ext_ack * extack)377 int devlink_reload(struct devlink *devlink, struct net *dest_net, 378 enum devlink_reload_action action, 379 enum devlink_reload_limit limit, 380 u32 *actions_performed, struct netlink_ext_ack *extack) 381 { 382 u32 remote_reload_stats[DEVLINK_RELOAD_STATS_ARRAY_SIZE]; 383 struct net *curr_net; 384 int err; 385 386 memcpy(remote_reload_stats, devlink->stats.remote_reload_stats, 387 sizeof(remote_reload_stats)); 388 389 err = devlink->ops->reload_down(devlink, !!dest_net, action, limit, extack); 390 if (err) 391 return err; 392 393 curr_net = devlink_net(devlink); 394 if (dest_net && !net_eq(dest_net, curr_net)) 395 devlink_reload_netns_change(devlink, curr_net, dest_net); 396 397 if (action == DEVLINK_RELOAD_ACTION_DRIVER_REINIT) 398 devlink_params_driverinit_load_new(devlink); 399 400 err = devlink->ops->reload_up(devlink, action, limit, actions_performed, extack); 401 devlink_reload_failed_set(devlink, !!err); 402 if (err) 403 return err; 404 405 WARN_ON(!(*actions_performed & BIT(action))); 406 /* Catch driver on updating the remote action within devlink reload */ 407 WARN_ON(memcmp(remote_reload_stats, devlink->stats.remote_reload_stats, 408 sizeof(remote_reload_stats))); 409 devlink_reload_stats_update(devlink, limit, *actions_performed); 410 return 0; 411 } 412 413 static int devlink_nl_reload_actions_performed_snd(struct devlink * devlink,u32 actions_performed,enum devlink_command cmd,struct genl_info * info)414 devlink_nl_reload_actions_performed_snd(struct devlink *devlink, u32 actions_performed, 415 enum devlink_command cmd, struct genl_info *info) 416 { 417 struct sk_buff *msg; 418 void *hdr; 419 420 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); 421 if (!msg) 422 return -ENOMEM; 423 424 hdr = genlmsg_put(msg, info->snd_portid, info->snd_seq, &devlink_nl_family, 0, cmd); 425 if (!hdr) 426 goto free_msg; 427 428 if (devlink_nl_put_handle(msg, devlink)) 429 goto nla_put_failure; 430 431 if (nla_put_bitfield32(msg, DEVLINK_ATTR_RELOAD_ACTIONS_PERFORMED, actions_performed, 432 actions_performed)) 433 goto nla_put_failure; 434 genlmsg_end(msg, hdr); 435 436 return genlmsg_reply(msg, info); 437 438 nla_put_failure: 439 genlmsg_cancel(msg, hdr); 440 free_msg: 441 nlmsg_free(msg); 442 return -EMSGSIZE; 443 } 444 devlink_nl_cmd_reload(struct sk_buff * skb,struct genl_info * info)445 int devlink_nl_cmd_reload(struct sk_buff *skb, struct genl_info *info) 446 { 447 struct devlink *devlink = info->user_ptr[0]; 448 enum devlink_reload_action action; 449 enum devlink_reload_limit limit; 450 struct net *dest_net = NULL; 451 u32 actions_performed; 452 int err; 453 454 err = devlink_resources_validate(devlink, NULL, info); 455 if (err) { 456 NL_SET_ERR_MSG(info->extack, "resources size validation failed"); 457 return err; 458 } 459 460 if (info->attrs[DEVLINK_ATTR_RELOAD_ACTION]) 461 action = nla_get_u8(info->attrs[DEVLINK_ATTR_RELOAD_ACTION]); 462 else 463 action = DEVLINK_RELOAD_ACTION_DRIVER_REINIT; 464 465 if (!devlink_reload_action_is_supported(devlink, action)) { 466 NL_SET_ERR_MSG(info->extack, "Requested reload action is not supported by the driver"); 467 return -EOPNOTSUPP; 468 } 469 470 limit = DEVLINK_RELOAD_LIMIT_UNSPEC; 471 if (info->attrs[DEVLINK_ATTR_RELOAD_LIMITS]) { 472 struct nla_bitfield32 limits; 473 u32 limits_selected; 474 475 limits = nla_get_bitfield32(info->attrs[DEVLINK_ATTR_RELOAD_LIMITS]); 476 limits_selected = limits.value & limits.selector; 477 if (!limits_selected) { 478 NL_SET_ERR_MSG(info->extack, "Invalid limit selected"); 479 return -EINVAL; 480 } 481 for (limit = 0 ; limit <= DEVLINK_RELOAD_LIMIT_MAX ; limit++) 482 if (limits_selected & BIT(limit)) 483 break; 484 /* UAPI enables multiselection, but currently it is not used */ 485 if (limits_selected != BIT(limit)) { 486 NL_SET_ERR_MSG(info->extack, "Multiselection of limit is not supported"); 487 return -EOPNOTSUPP; 488 } 489 if (!devlink_reload_limit_is_supported(devlink, limit)) { 490 NL_SET_ERR_MSG(info->extack, "Requested limit is not supported by the driver"); 491 return -EOPNOTSUPP; 492 } 493 if (devlink_reload_combination_is_invalid(action, limit)) { 494 NL_SET_ERR_MSG(info->extack, "Requested limit is invalid for this action"); 495 return -EINVAL; 496 } 497 } 498 if (info->attrs[DEVLINK_ATTR_NETNS_PID] || 499 info->attrs[DEVLINK_ATTR_NETNS_FD] || 500 info->attrs[DEVLINK_ATTR_NETNS_ID]) { 501 dest_net = devlink_netns_get(skb, info); 502 if (IS_ERR(dest_net)) 503 return PTR_ERR(dest_net); 504 if (!net_eq(dest_net, devlink_net(devlink)) && 505 action != DEVLINK_RELOAD_ACTION_DRIVER_REINIT) { 506 NL_SET_ERR_MSG_MOD(info->extack, 507 "Changing namespace is only supported for reinit action"); 508 return -EOPNOTSUPP; 509 } 510 } 511 512 err = devlink_reload(devlink, dest_net, action, limit, &actions_performed, info->extack); 513 514 if (dest_net) 515 put_net(dest_net); 516 517 if (err) 518 return err; 519 /* For backward compatibility generate reply only if attributes used by user */ 520 if (!info->attrs[DEVLINK_ATTR_RELOAD_ACTION] && !info->attrs[DEVLINK_ATTR_RELOAD_LIMITS]) 521 return 0; 522 523 return devlink_nl_reload_actions_performed_snd(devlink, actions_performed, 524 DEVLINK_CMD_RELOAD, info); 525 } 526 devlink_reload_actions_valid(const struct devlink_ops * ops)527 bool devlink_reload_actions_valid(const struct devlink_ops *ops) 528 { 529 const struct devlink_reload_combination *comb; 530 int i; 531 532 if (!devlink_reload_supported(ops)) { 533 if (WARN_ON(ops->reload_actions)) 534 return false; 535 return true; 536 } 537 538 if (WARN_ON(!ops->reload_actions || 539 ops->reload_actions & BIT(DEVLINK_RELOAD_ACTION_UNSPEC) || 540 ops->reload_actions >= BIT(__DEVLINK_RELOAD_ACTION_MAX))) 541 return false; 542 543 if (WARN_ON(ops->reload_limits & BIT(DEVLINK_RELOAD_LIMIT_UNSPEC) || 544 ops->reload_limits >= BIT(__DEVLINK_RELOAD_LIMIT_MAX))) 545 return false; 546 547 for (i = 0; i < ARRAY_SIZE(devlink_reload_invalid_combinations); i++) { 548 comb = &devlink_reload_invalid_combinations[i]; 549 if (ops->reload_actions == BIT(comb->action) && 550 ops->reload_limits == BIT(comb->limit)) 551 return false; 552 } 553 return true; 554 } 555 devlink_nl_eswitch_fill(struct sk_buff * msg,struct devlink * devlink,enum devlink_command cmd,u32 portid,u32 seq,int flags)556 static int devlink_nl_eswitch_fill(struct sk_buff *msg, struct devlink *devlink, 557 enum devlink_command cmd, u32 portid, 558 u32 seq, int flags) 559 { 560 const struct devlink_ops *ops = devlink->ops; 561 enum devlink_eswitch_encap_mode encap_mode; 562 u8 inline_mode; 563 void *hdr; 564 int err = 0; 565 u16 mode; 566 567 hdr = genlmsg_put(msg, portid, seq, &devlink_nl_family, flags, cmd); 568 if (!hdr) 569 return -EMSGSIZE; 570 571 err = devlink_nl_put_handle(msg, devlink); 572 if (err) 573 goto nla_put_failure; 574 575 if (ops->eswitch_mode_get) { 576 err = ops->eswitch_mode_get(devlink, &mode); 577 if (err) 578 goto nla_put_failure; 579 err = nla_put_u16(msg, DEVLINK_ATTR_ESWITCH_MODE, mode); 580 if (err) 581 goto nla_put_failure; 582 } 583 584 if (ops->eswitch_inline_mode_get) { 585 err = ops->eswitch_inline_mode_get(devlink, &inline_mode); 586 if (err) 587 goto nla_put_failure; 588 err = nla_put_u8(msg, DEVLINK_ATTR_ESWITCH_INLINE_MODE, 589 inline_mode); 590 if (err) 591 goto nla_put_failure; 592 } 593 594 if (ops->eswitch_encap_mode_get) { 595 err = ops->eswitch_encap_mode_get(devlink, &encap_mode); 596 if (err) 597 goto nla_put_failure; 598 err = nla_put_u8(msg, DEVLINK_ATTR_ESWITCH_ENCAP_MODE, encap_mode); 599 if (err) 600 goto nla_put_failure; 601 } 602 603 genlmsg_end(msg, hdr); 604 return 0; 605 606 nla_put_failure: 607 genlmsg_cancel(msg, hdr); 608 return err; 609 } 610 devlink_nl_cmd_eswitch_get_doit(struct sk_buff * skb,struct genl_info * info)611 int devlink_nl_cmd_eswitch_get_doit(struct sk_buff *skb, struct genl_info *info) 612 { 613 struct devlink *devlink = info->user_ptr[0]; 614 struct sk_buff *msg; 615 int err; 616 617 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); 618 if (!msg) 619 return -ENOMEM; 620 621 err = devlink_nl_eswitch_fill(msg, devlink, DEVLINK_CMD_ESWITCH_GET, 622 info->snd_portid, info->snd_seq, 0); 623 624 if (err) { 625 nlmsg_free(msg); 626 return err; 627 } 628 629 return genlmsg_reply(msg, info); 630 } 631 devlink_nl_cmd_eswitch_set_doit(struct sk_buff * skb,struct genl_info * info)632 int devlink_nl_cmd_eswitch_set_doit(struct sk_buff *skb, struct genl_info *info) 633 { 634 struct devlink *devlink = info->user_ptr[0]; 635 const struct devlink_ops *ops = devlink->ops; 636 enum devlink_eswitch_encap_mode encap_mode; 637 u8 inline_mode; 638 int err = 0; 639 u16 mode; 640 641 if (info->attrs[DEVLINK_ATTR_ESWITCH_MODE]) { 642 if (!ops->eswitch_mode_set) 643 return -EOPNOTSUPP; 644 mode = nla_get_u16(info->attrs[DEVLINK_ATTR_ESWITCH_MODE]); 645 err = devlink_rate_nodes_check(devlink, mode, info->extack); 646 if (err) 647 return err; 648 err = ops->eswitch_mode_set(devlink, mode, info->extack); 649 if (err) 650 return err; 651 } 652 653 if (info->attrs[DEVLINK_ATTR_ESWITCH_INLINE_MODE]) { 654 if (!ops->eswitch_inline_mode_set) 655 return -EOPNOTSUPP; 656 inline_mode = nla_get_u8(info->attrs[DEVLINK_ATTR_ESWITCH_INLINE_MODE]); 657 err = ops->eswitch_inline_mode_set(devlink, inline_mode, 658 info->extack); 659 if (err) 660 return err; 661 } 662 663 if (info->attrs[DEVLINK_ATTR_ESWITCH_ENCAP_MODE]) { 664 if (!ops->eswitch_encap_mode_set) 665 return -EOPNOTSUPP; 666 encap_mode = nla_get_u8(info->attrs[DEVLINK_ATTR_ESWITCH_ENCAP_MODE]); 667 err = ops->eswitch_encap_mode_set(devlink, encap_mode, 668 info->extack); 669 if (err) 670 return err; 671 } 672 673 return 0; 674 } 675 devlink_info_serial_number_put(struct devlink_info_req * req,const char * sn)676 int devlink_info_serial_number_put(struct devlink_info_req *req, const char *sn) 677 { 678 if (!req->msg) 679 return 0; 680 return nla_put_string(req->msg, DEVLINK_ATTR_INFO_SERIAL_NUMBER, sn); 681 } 682 EXPORT_SYMBOL_GPL(devlink_info_serial_number_put); 683 devlink_info_board_serial_number_put(struct devlink_info_req * req,const char * bsn)684 int devlink_info_board_serial_number_put(struct devlink_info_req *req, 685 const char *bsn) 686 { 687 if (!req->msg) 688 return 0; 689 return nla_put_string(req->msg, DEVLINK_ATTR_INFO_BOARD_SERIAL_NUMBER, 690 bsn); 691 } 692 EXPORT_SYMBOL_GPL(devlink_info_board_serial_number_put); 693 devlink_info_version_put(struct devlink_info_req * req,int attr,const char * version_name,const char * version_value,enum devlink_info_version_type version_type)694 static int devlink_info_version_put(struct devlink_info_req *req, int attr, 695 const char *version_name, 696 const char *version_value, 697 enum devlink_info_version_type version_type) 698 { 699 struct nlattr *nest; 700 int err; 701 702 if (req->version_cb) 703 req->version_cb(version_name, version_type, 704 req->version_cb_priv); 705 706 if (!req->msg) 707 return 0; 708 709 nest = nla_nest_start_noflag(req->msg, attr); 710 if (!nest) 711 return -EMSGSIZE; 712 713 err = nla_put_string(req->msg, DEVLINK_ATTR_INFO_VERSION_NAME, 714 version_name); 715 if (err) 716 goto nla_put_failure; 717 718 err = nla_put_string(req->msg, DEVLINK_ATTR_INFO_VERSION_VALUE, 719 version_value); 720 if (err) 721 goto nla_put_failure; 722 723 nla_nest_end(req->msg, nest); 724 725 return 0; 726 727 nla_put_failure: 728 nla_nest_cancel(req->msg, nest); 729 return err; 730 } 731 devlink_info_version_fixed_put(struct devlink_info_req * req,const char * version_name,const char * version_value)732 int devlink_info_version_fixed_put(struct devlink_info_req *req, 733 const char *version_name, 734 const char *version_value) 735 { 736 return devlink_info_version_put(req, DEVLINK_ATTR_INFO_VERSION_FIXED, 737 version_name, version_value, 738 DEVLINK_INFO_VERSION_TYPE_NONE); 739 } 740 EXPORT_SYMBOL_GPL(devlink_info_version_fixed_put); 741 devlink_info_version_stored_put(struct devlink_info_req * req,const char * version_name,const char * version_value)742 int devlink_info_version_stored_put(struct devlink_info_req *req, 743 const char *version_name, 744 const char *version_value) 745 { 746 return devlink_info_version_put(req, DEVLINK_ATTR_INFO_VERSION_STORED, 747 version_name, version_value, 748 DEVLINK_INFO_VERSION_TYPE_NONE); 749 } 750 EXPORT_SYMBOL_GPL(devlink_info_version_stored_put); 751 devlink_info_version_stored_put_ext(struct devlink_info_req * req,const char * version_name,const char * version_value,enum devlink_info_version_type version_type)752 int devlink_info_version_stored_put_ext(struct devlink_info_req *req, 753 const char *version_name, 754 const char *version_value, 755 enum devlink_info_version_type version_type) 756 { 757 return devlink_info_version_put(req, DEVLINK_ATTR_INFO_VERSION_STORED, 758 version_name, version_value, 759 version_type); 760 } 761 EXPORT_SYMBOL_GPL(devlink_info_version_stored_put_ext); 762 devlink_info_version_running_put(struct devlink_info_req * req,const char * version_name,const char * version_value)763 int devlink_info_version_running_put(struct devlink_info_req *req, 764 const char *version_name, 765 const char *version_value) 766 { 767 return devlink_info_version_put(req, DEVLINK_ATTR_INFO_VERSION_RUNNING, 768 version_name, version_value, 769 DEVLINK_INFO_VERSION_TYPE_NONE); 770 } 771 EXPORT_SYMBOL_GPL(devlink_info_version_running_put); 772 devlink_info_version_running_put_ext(struct devlink_info_req * req,const char * version_name,const char * version_value,enum devlink_info_version_type version_type)773 int devlink_info_version_running_put_ext(struct devlink_info_req *req, 774 const char *version_name, 775 const char *version_value, 776 enum devlink_info_version_type version_type) 777 { 778 return devlink_info_version_put(req, DEVLINK_ATTR_INFO_VERSION_RUNNING, 779 version_name, version_value, 780 version_type); 781 } 782 EXPORT_SYMBOL_GPL(devlink_info_version_running_put_ext); 783 devlink_nl_driver_info_get(struct device_driver * drv,struct devlink_info_req * req)784 static int devlink_nl_driver_info_get(struct device_driver *drv, 785 struct devlink_info_req *req) 786 { 787 if (!drv) 788 return 0; 789 790 if (drv->name[0]) 791 return nla_put_string(req->msg, DEVLINK_ATTR_INFO_DRIVER_NAME, 792 drv->name); 793 794 return 0; 795 } 796 797 static int devlink_nl_info_fill(struct sk_buff * msg,struct devlink * devlink,enum devlink_command cmd,u32 portid,u32 seq,int flags,struct netlink_ext_ack * extack)798 devlink_nl_info_fill(struct sk_buff *msg, struct devlink *devlink, 799 enum devlink_command cmd, u32 portid, 800 u32 seq, int flags, struct netlink_ext_ack *extack) 801 { 802 struct device *dev = devlink_to_dev(devlink); 803 struct devlink_info_req req = {}; 804 void *hdr; 805 int err; 806 807 hdr = genlmsg_put(msg, portid, seq, &devlink_nl_family, flags, cmd); 808 if (!hdr) 809 return -EMSGSIZE; 810 811 err = -EMSGSIZE; 812 if (devlink_nl_put_handle(msg, devlink)) 813 goto err_cancel_msg; 814 815 req.msg = msg; 816 if (devlink->ops->info_get) { 817 err = devlink->ops->info_get(devlink, &req, extack); 818 if (err) 819 goto err_cancel_msg; 820 } 821 822 err = devlink_nl_driver_info_get(dev->driver, &req); 823 if (err) 824 goto err_cancel_msg; 825 826 genlmsg_end(msg, hdr); 827 return 0; 828 829 err_cancel_msg: 830 genlmsg_cancel(msg, hdr); 831 return err; 832 } 833 devlink_nl_info_get_doit(struct sk_buff * skb,struct genl_info * info)834 int devlink_nl_info_get_doit(struct sk_buff *skb, struct genl_info *info) 835 { 836 struct devlink *devlink = info->user_ptr[0]; 837 struct sk_buff *msg; 838 int err; 839 840 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); 841 if (!msg) 842 return -ENOMEM; 843 844 err = devlink_nl_info_fill(msg, devlink, DEVLINK_CMD_INFO_GET, 845 info->snd_portid, info->snd_seq, 0, 846 info->extack); 847 if (err) { 848 nlmsg_free(msg); 849 return err; 850 } 851 852 return genlmsg_reply(msg, info); 853 } 854 855 static int devlink_nl_info_get_dump_one(struct sk_buff * msg,struct devlink * devlink,struct netlink_callback * cb,int flags)856 devlink_nl_info_get_dump_one(struct sk_buff *msg, struct devlink *devlink, 857 struct netlink_callback *cb, int flags) 858 { 859 int err; 860 861 err = devlink_nl_info_fill(msg, devlink, DEVLINK_CMD_INFO_GET, 862 NETLINK_CB(cb->skb).portid, 863 cb->nlh->nlmsg_seq, flags, 864 cb->extack); 865 if (err == -EOPNOTSUPP) 866 err = 0; 867 return err; 868 } 869 devlink_nl_info_get_dumpit(struct sk_buff * msg,struct netlink_callback * cb)870 int devlink_nl_info_get_dumpit(struct sk_buff *msg, struct netlink_callback *cb) 871 { 872 return devlink_nl_dumpit(msg, cb, devlink_nl_info_get_dump_one); 873 } 874 devlink_nl_flash_update_fill(struct sk_buff * msg,struct devlink * devlink,enum devlink_command cmd,struct devlink_flash_notify * params)875 static int devlink_nl_flash_update_fill(struct sk_buff *msg, 876 struct devlink *devlink, 877 enum devlink_command cmd, 878 struct devlink_flash_notify *params) 879 { 880 void *hdr; 881 882 hdr = genlmsg_put(msg, 0, 0, &devlink_nl_family, 0, cmd); 883 if (!hdr) 884 return -EMSGSIZE; 885 886 if (devlink_nl_put_handle(msg, devlink)) 887 goto nla_put_failure; 888 889 if (cmd != DEVLINK_CMD_FLASH_UPDATE_STATUS) 890 goto out; 891 892 if (params->status_msg && 893 nla_put_string(msg, DEVLINK_ATTR_FLASH_UPDATE_STATUS_MSG, 894 params->status_msg)) 895 goto nla_put_failure; 896 if (params->component && 897 nla_put_string(msg, DEVLINK_ATTR_FLASH_UPDATE_COMPONENT, 898 params->component)) 899 goto nla_put_failure; 900 if (nla_put_u64_64bit(msg, DEVLINK_ATTR_FLASH_UPDATE_STATUS_DONE, 901 params->done, DEVLINK_ATTR_PAD)) 902 goto nla_put_failure; 903 if (nla_put_u64_64bit(msg, DEVLINK_ATTR_FLASH_UPDATE_STATUS_TOTAL, 904 params->total, DEVLINK_ATTR_PAD)) 905 goto nla_put_failure; 906 if (nla_put_u64_64bit(msg, DEVLINK_ATTR_FLASH_UPDATE_STATUS_TIMEOUT, 907 params->timeout, DEVLINK_ATTR_PAD)) 908 goto nla_put_failure; 909 910 out: 911 genlmsg_end(msg, hdr); 912 return 0; 913 914 nla_put_failure: 915 genlmsg_cancel(msg, hdr); 916 return -EMSGSIZE; 917 } 918 __devlink_flash_update_notify(struct devlink * devlink,enum devlink_command cmd,struct devlink_flash_notify * params)919 static void __devlink_flash_update_notify(struct devlink *devlink, 920 enum devlink_command cmd, 921 struct devlink_flash_notify *params) 922 { 923 struct sk_buff *msg; 924 int err; 925 926 WARN_ON(cmd != DEVLINK_CMD_FLASH_UPDATE && 927 cmd != DEVLINK_CMD_FLASH_UPDATE_END && 928 cmd != DEVLINK_CMD_FLASH_UPDATE_STATUS); 929 930 if (!xa_get_mark(&devlinks, devlink->index, DEVLINK_REGISTERED)) 931 return; 932 933 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); 934 if (!msg) 935 return; 936 937 err = devlink_nl_flash_update_fill(msg, devlink, cmd, params); 938 if (err) 939 goto out_free_msg; 940 941 genlmsg_multicast_netns(&devlink_nl_family, devlink_net(devlink), 942 msg, 0, DEVLINK_MCGRP_CONFIG, GFP_KERNEL); 943 return; 944 945 out_free_msg: 946 nlmsg_free(msg); 947 } 948 devlink_flash_update_begin_notify(struct devlink * devlink)949 static void devlink_flash_update_begin_notify(struct devlink *devlink) 950 { 951 struct devlink_flash_notify params = {}; 952 953 __devlink_flash_update_notify(devlink, 954 DEVLINK_CMD_FLASH_UPDATE, 955 ¶ms); 956 } 957 devlink_flash_update_end_notify(struct devlink * devlink)958 static void devlink_flash_update_end_notify(struct devlink *devlink) 959 { 960 struct devlink_flash_notify params = {}; 961 962 __devlink_flash_update_notify(devlink, 963 DEVLINK_CMD_FLASH_UPDATE_END, 964 ¶ms); 965 } 966 devlink_flash_update_status_notify(struct devlink * devlink,const char * status_msg,const char * component,unsigned long done,unsigned long total)967 void devlink_flash_update_status_notify(struct devlink *devlink, 968 const char *status_msg, 969 const char *component, 970 unsigned long done, 971 unsigned long total) 972 { 973 struct devlink_flash_notify params = { 974 .status_msg = status_msg, 975 .component = component, 976 .done = done, 977 .total = total, 978 }; 979 980 __devlink_flash_update_notify(devlink, 981 DEVLINK_CMD_FLASH_UPDATE_STATUS, 982 ¶ms); 983 } 984 EXPORT_SYMBOL_GPL(devlink_flash_update_status_notify); 985 devlink_flash_update_timeout_notify(struct devlink * devlink,const char * status_msg,const char * component,unsigned long timeout)986 void devlink_flash_update_timeout_notify(struct devlink *devlink, 987 const char *status_msg, 988 const char *component, 989 unsigned long timeout) 990 { 991 struct devlink_flash_notify params = { 992 .status_msg = status_msg, 993 .component = component, 994 .timeout = timeout, 995 }; 996 997 __devlink_flash_update_notify(devlink, 998 DEVLINK_CMD_FLASH_UPDATE_STATUS, 999 ¶ms); 1000 } 1001 EXPORT_SYMBOL_GPL(devlink_flash_update_timeout_notify); 1002 1003 struct devlink_flash_component_lookup_ctx { 1004 const char *lookup_name; 1005 bool lookup_name_found; 1006 }; 1007 1008 static void devlink_flash_component_lookup_cb(const char * version_name,enum devlink_info_version_type version_type,void * version_cb_priv)1009 devlink_flash_component_lookup_cb(const char *version_name, 1010 enum devlink_info_version_type version_type, 1011 void *version_cb_priv) 1012 { 1013 struct devlink_flash_component_lookup_ctx *lookup_ctx = version_cb_priv; 1014 1015 if (version_type != DEVLINK_INFO_VERSION_TYPE_COMPONENT || 1016 lookup_ctx->lookup_name_found) 1017 return; 1018 1019 lookup_ctx->lookup_name_found = 1020 !strcmp(lookup_ctx->lookup_name, version_name); 1021 } 1022 devlink_flash_component_get(struct devlink * devlink,struct nlattr * nla_component,const char ** p_component,struct netlink_ext_ack * extack)1023 static int devlink_flash_component_get(struct devlink *devlink, 1024 struct nlattr *nla_component, 1025 const char **p_component, 1026 struct netlink_ext_ack *extack) 1027 { 1028 struct devlink_flash_component_lookup_ctx lookup_ctx = {}; 1029 struct devlink_info_req req = {}; 1030 const char *component; 1031 int ret; 1032 1033 if (!nla_component) 1034 return 0; 1035 1036 component = nla_data(nla_component); 1037 1038 if (!devlink->ops->info_get) { 1039 NL_SET_ERR_MSG_ATTR(extack, nla_component, 1040 "component update is not supported by this device"); 1041 return -EOPNOTSUPP; 1042 } 1043 1044 lookup_ctx.lookup_name = component; 1045 req.version_cb = devlink_flash_component_lookup_cb; 1046 req.version_cb_priv = &lookup_ctx; 1047 1048 ret = devlink->ops->info_get(devlink, &req, NULL); 1049 if (ret) 1050 return ret; 1051 1052 if (!lookup_ctx.lookup_name_found) { 1053 NL_SET_ERR_MSG_ATTR(extack, nla_component, 1054 "selected component is not supported by this device"); 1055 return -EINVAL; 1056 } 1057 *p_component = component; 1058 return 0; 1059 } 1060 devlink_nl_cmd_flash_update(struct sk_buff * skb,struct genl_info * info)1061 int devlink_nl_cmd_flash_update(struct sk_buff *skb, struct genl_info *info) 1062 { 1063 struct nlattr *nla_overwrite_mask, *nla_file_name; 1064 struct devlink_flash_update_params params = {}; 1065 struct devlink *devlink = info->user_ptr[0]; 1066 const char *file_name; 1067 u32 supported_params; 1068 int ret; 1069 1070 if (!devlink->ops->flash_update) 1071 return -EOPNOTSUPP; 1072 1073 if (GENL_REQ_ATTR_CHECK(info, DEVLINK_ATTR_FLASH_UPDATE_FILE_NAME)) 1074 return -EINVAL; 1075 1076 ret = devlink_flash_component_get(devlink, 1077 info->attrs[DEVLINK_ATTR_FLASH_UPDATE_COMPONENT], 1078 ¶ms.component, info->extack); 1079 if (ret) 1080 return ret; 1081 1082 supported_params = devlink->ops->supported_flash_update_params; 1083 1084 nla_overwrite_mask = info->attrs[DEVLINK_ATTR_FLASH_UPDATE_OVERWRITE_MASK]; 1085 if (nla_overwrite_mask) { 1086 struct nla_bitfield32 sections; 1087 1088 if (!(supported_params & DEVLINK_SUPPORT_FLASH_UPDATE_OVERWRITE_MASK)) { 1089 NL_SET_ERR_MSG_ATTR(info->extack, nla_overwrite_mask, 1090 "overwrite settings are not supported by this device"); 1091 return -EOPNOTSUPP; 1092 } 1093 sections = nla_get_bitfield32(nla_overwrite_mask); 1094 params.overwrite_mask = sections.value & sections.selector; 1095 } 1096 1097 nla_file_name = info->attrs[DEVLINK_ATTR_FLASH_UPDATE_FILE_NAME]; 1098 file_name = nla_data(nla_file_name); 1099 ret = request_firmware(¶ms.fw, file_name, devlink->dev); 1100 if (ret) { 1101 NL_SET_ERR_MSG_ATTR(info->extack, nla_file_name, 1102 "failed to locate the requested firmware file"); 1103 return ret; 1104 } 1105 1106 devlink_flash_update_begin_notify(devlink); 1107 ret = devlink->ops->flash_update(devlink, ¶ms, info->extack); 1108 devlink_flash_update_end_notify(devlink); 1109 1110 release_firmware(params.fw); 1111 1112 return ret; 1113 } 1114 __devlink_compat_running_version(struct devlink * devlink,char * buf,size_t len)1115 static void __devlink_compat_running_version(struct devlink *devlink, 1116 char *buf, size_t len) 1117 { 1118 struct devlink_info_req req = {}; 1119 const struct nlattr *nlattr; 1120 struct sk_buff *msg; 1121 int rem, err; 1122 1123 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); 1124 if (!msg) 1125 return; 1126 1127 req.msg = msg; 1128 err = devlink->ops->info_get(devlink, &req, NULL); 1129 if (err) 1130 goto free_msg; 1131 1132 nla_for_each_attr(nlattr, (void *)msg->data, msg->len, rem) { 1133 const struct nlattr *kv; 1134 int rem_kv; 1135 1136 if (nla_type(nlattr) != DEVLINK_ATTR_INFO_VERSION_RUNNING) 1137 continue; 1138 1139 nla_for_each_nested(kv, nlattr, rem_kv) { 1140 if (nla_type(kv) != DEVLINK_ATTR_INFO_VERSION_VALUE) 1141 continue; 1142 1143 strlcat(buf, nla_data(kv), len); 1144 strlcat(buf, " ", len); 1145 } 1146 } 1147 free_msg: 1148 nlmsg_free(msg); 1149 } 1150 devlink_compat_running_version(struct devlink * devlink,char * buf,size_t len)1151 void devlink_compat_running_version(struct devlink *devlink, 1152 char *buf, size_t len) 1153 { 1154 if (!devlink->ops->info_get) 1155 return; 1156 1157 devl_lock(devlink); 1158 if (devl_is_registered(devlink)) 1159 __devlink_compat_running_version(devlink, buf, len); 1160 devl_unlock(devlink); 1161 } 1162 devlink_compat_flash_update(struct devlink * devlink,const char * file_name)1163 int devlink_compat_flash_update(struct devlink *devlink, const char *file_name) 1164 { 1165 struct devlink_flash_update_params params = {}; 1166 int ret; 1167 1168 devl_lock(devlink); 1169 if (!devl_is_registered(devlink)) { 1170 ret = -ENODEV; 1171 goto out_unlock; 1172 } 1173 1174 if (!devlink->ops->flash_update) { 1175 ret = -EOPNOTSUPP; 1176 goto out_unlock; 1177 } 1178 1179 ret = request_firmware(¶ms.fw, file_name, devlink->dev); 1180 if (ret) 1181 goto out_unlock; 1182 1183 devlink_flash_update_begin_notify(devlink); 1184 ret = devlink->ops->flash_update(devlink, ¶ms, NULL); 1185 devlink_flash_update_end_notify(devlink); 1186 1187 release_firmware(params.fw); 1188 out_unlock: 1189 devl_unlock(devlink); 1190 1191 return ret; 1192 } 1193 1194 static int devlink_nl_selftests_fill(struct sk_buff * msg,struct devlink * devlink,u32 portid,u32 seq,int flags,struct netlink_ext_ack * extack)1195 devlink_nl_selftests_fill(struct sk_buff *msg, struct devlink *devlink, 1196 u32 portid, u32 seq, int flags, 1197 struct netlink_ext_ack *extack) 1198 { 1199 struct nlattr *selftests; 1200 void *hdr; 1201 int err; 1202 int i; 1203 1204 hdr = genlmsg_put(msg, portid, seq, &devlink_nl_family, flags, 1205 DEVLINK_CMD_SELFTESTS_GET); 1206 if (!hdr) 1207 return -EMSGSIZE; 1208 1209 err = -EMSGSIZE; 1210 if (devlink_nl_put_handle(msg, devlink)) 1211 goto err_cancel_msg; 1212 1213 selftests = nla_nest_start(msg, DEVLINK_ATTR_SELFTESTS); 1214 if (!selftests) 1215 goto err_cancel_msg; 1216 1217 for (i = DEVLINK_ATTR_SELFTEST_ID_UNSPEC + 1; 1218 i <= DEVLINK_ATTR_SELFTEST_ID_MAX; i++) { 1219 if (devlink->ops->selftest_check(devlink, i, extack)) { 1220 err = nla_put_flag(msg, i); 1221 if (err) 1222 goto err_cancel_msg; 1223 } 1224 } 1225 1226 nla_nest_end(msg, selftests); 1227 genlmsg_end(msg, hdr); 1228 return 0; 1229 1230 err_cancel_msg: 1231 genlmsg_cancel(msg, hdr); 1232 return err; 1233 } 1234 devlink_nl_selftests_get_doit(struct sk_buff * skb,struct genl_info * info)1235 int devlink_nl_selftests_get_doit(struct sk_buff *skb, struct genl_info *info) 1236 { 1237 struct devlink *devlink = info->user_ptr[0]; 1238 struct sk_buff *msg; 1239 int err; 1240 1241 if (!devlink->ops->selftest_check) 1242 return -EOPNOTSUPP; 1243 1244 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); 1245 if (!msg) 1246 return -ENOMEM; 1247 1248 err = devlink_nl_selftests_fill(msg, devlink, info->snd_portid, 1249 info->snd_seq, 0, info->extack); 1250 if (err) { 1251 nlmsg_free(msg); 1252 return err; 1253 } 1254 1255 return genlmsg_reply(msg, info); 1256 } 1257 devlink_nl_selftests_get_dump_one(struct sk_buff * msg,struct devlink * devlink,struct netlink_callback * cb,int flags)1258 static int devlink_nl_selftests_get_dump_one(struct sk_buff *msg, 1259 struct devlink *devlink, 1260 struct netlink_callback *cb, 1261 int flags) 1262 { 1263 if (!devlink->ops->selftest_check) 1264 return 0; 1265 1266 return devlink_nl_selftests_fill(msg, devlink, 1267 NETLINK_CB(cb->skb).portid, 1268 cb->nlh->nlmsg_seq, flags, 1269 cb->extack); 1270 } 1271 devlink_nl_selftests_get_dumpit(struct sk_buff * skb,struct netlink_callback * cb)1272 int devlink_nl_selftests_get_dumpit(struct sk_buff *skb, 1273 struct netlink_callback *cb) 1274 { 1275 return devlink_nl_dumpit(skb, cb, devlink_nl_selftests_get_dump_one); 1276 } 1277 devlink_selftest_result_put(struct sk_buff * skb,unsigned int id,enum devlink_selftest_status test_status)1278 static int devlink_selftest_result_put(struct sk_buff *skb, unsigned int id, 1279 enum devlink_selftest_status test_status) 1280 { 1281 struct nlattr *result_attr; 1282 1283 result_attr = nla_nest_start(skb, DEVLINK_ATTR_SELFTEST_RESULT); 1284 if (!result_attr) 1285 return -EMSGSIZE; 1286 1287 if (nla_put_u32(skb, DEVLINK_ATTR_SELFTEST_RESULT_ID, id) || 1288 nla_put_u8(skb, DEVLINK_ATTR_SELFTEST_RESULT_STATUS, 1289 test_status)) 1290 goto nla_put_failure; 1291 1292 nla_nest_end(skb, result_attr); 1293 return 0; 1294 1295 nla_put_failure: 1296 nla_nest_cancel(skb, result_attr); 1297 return -EMSGSIZE; 1298 } 1299 1300 static const struct nla_policy devlink_selftest_nl_policy[DEVLINK_ATTR_SELFTEST_ID_MAX + 1] = { 1301 [DEVLINK_ATTR_SELFTEST_ID_FLASH] = { .type = NLA_FLAG }, 1302 }; 1303 devlink_nl_cmd_selftests_run(struct sk_buff * skb,struct genl_info * info)1304 int devlink_nl_cmd_selftests_run(struct sk_buff *skb, struct genl_info *info) 1305 { 1306 struct nlattr *tb[DEVLINK_ATTR_SELFTEST_ID_MAX + 1]; 1307 struct devlink *devlink = info->user_ptr[0]; 1308 struct nlattr *attrs, *selftests; 1309 struct sk_buff *msg; 1310 void *hdr; 1311 int err; 1312 int i; 1313 1314 if (!devlink->ops->selftest_run || !devlink->ops->selftest_check) 1315 return -EOPNOTSUPP; 1316 1317 if (GENL_REQ_ATTR_CHECK(info, DEVLINK_ATTR_SELFTESTS)) 1318 return -EINVAL; 1319 1320 attrs = info->attrs[DEVLINK_ATTR_SELFTESTS]; 1321 1322 err = nla_parse_nested(tb, DEVLINK_ATTR_SELFTEST_ID_MAX, attrs, 1323 devlink_selftest_nl_policy, info->extack); 1324 if (err < 0) 1325 return err; 1326 1327 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); 1328 if (!msg) 1329 return -ENOMEM; 1330 1331 err = -EMSGSIZE; 1332 hdr = genlmsg_put(msg, info->snd_portid, info->snd_seq, 1333 &devlink_nl_family, 0, DEVLINK_CMD_SELFTESTS_RUN); 1334 if (!hdr) 1335 goto free_msg; 1336 1337 if (devlink_nl_put_handle(msg, devlink)) 1338 goto genlmsg_cancel; 1339 1340 selftests = nla_nest_start(msg, DEVLINK_ATTR_SELFTESTS); 1341 if (!selftests) 1342 goto genlmsg_cancel; 1343 1344 for (i = DEVLINK_ATTR_SELFTEST_ID_UNSPEC + 1; 1345 i <= DEVLINK_ATTR_SELFTEST_ID_MAX; i++) { 1346 enum devlink_selftest_status test_status; 1347 1348 if (nla_get_flag(tb[i])) { 1349 if (!devlink->ops->selftest_check(devlink, i, 1350 info->extack)) { 1351 if (devlink_selftest_result_put(msg, i, 1352 DEVLINK_SELFTEST_STATUS_SKIP)) 1353 goto selftests_nest_cancel; 1354 continue; 1355 } 1356 1357 test_status = devlink->ops->selftest_run(devlink, i, 1358 info->extack); 1359 if (devlink_selftest_result_put(msg, i, test_status)) 1360 goto selftests_nest_cancel; 1361 } 1362 } 1363 1364 nla_nest_end(msg, selftests); 1365 genlmsg_end(msg, hdr); 1366 return genlmsg_reply(msg, info); 1367 1368 selftests_nest_cancel: 1369 nla_nest_cancel(msg, selftests); 1370 genlmsg_cancel: 1371 genlmsg_cancel(msg, hdr); 1372 free_msg: 1373 nlmsg_free(msg); 1374 return err; 1375 } 1376