Linux Audio

Check our new training course

Loading...
v6.13.7
   1// SPDX-License-Identifier: GPL-2.0-only
   2
   3#include <net/sock.h>
   4#include <linux/ethtool_netlink.h>
   5#include <linux/phy_link_topology.h>
   6#include <linux/pm_runtime.h>
   7#include "netlink.h"
   8#include "module_fw.h"
   9
  10static struct genl_family ethtool_genl_family;
  11
  12static bool ethnl_ok __read_mostly;
  13static u32 ethnl_bcast_seq;
  14
  15#define ETHTOOL_FLAGS_BASIC (ETHTOOL_FLAG_COMPACT_BITSETS |	\
  16			     ETHTOOL_FLAG_OMIT_REPLY)
  17#define ETHTOOL_FLAGS_STATS (ETHTOOL_FLAGS_BASIC | ETHTOOL_FLAG_STATS)
  18
  19const struct nla_policy ethnl_header_policy[] = {
  20	[ETHTOOL_A_HEADER_DEV_INDEX]	= { .type = NLA_U32 },
  21	[ETHTOOL_A_HEADER_DEV_NAME]	= { .type = NLA_NUL_STRING,
  22					    .len = ALTIFNAMSIZ - 1 },
  23	[ETHTOOL_A_HEADER_FLAGS]	= NLA_POLICY_MASK(NLA_U32,
  24							  ETHTOOL_FLAGS_BASIC),
  25};
  26
  27const struct nla_policy ethnl_header_policy_stats[] = {
  28	[ETHTOOL_A_HEADER_DEV_INDEX]	= { .type = NLA_U32 },
  29	[ETHTOOL_A_HEADER_DEV_NAME]	= { .type = NLA_NUL_STRING,
  30					    .len = ALTIFNAMSIZ - 1 },
  31	[ETHTOOL_A_HEADER_FLAGS]	= NLA_POLICY_MASK(NLA_U32,
  32							  ETHTOOL_FLAGS_STATS),
  33};
  34
  35const struct nla_policy ethnl_header_policy_phy[] = {
  36	[ETHTOOL_A_HEADER_DEV_INDEX]	= { .type = NLA_U32 },
  37	[ETHTOOL_A_HEADER_DEV_NAME]	= { .type = NLA_NUL_STRING,
  38					    .len = ALTIFNAMSIZ - 1 },
  39	[ETHTOOL_A_HEADER_FLAGS]	= NLA_POLICY_MASK(NLA_U32,
  40							  ETHTOOL_FLAGS_BASIC),
  41	[ETHTOOL_A_HEADER_PHY_INDEX]		= NLA_POLICY_MIN(NLA_U32, 1),
  42};
  43
  44const struct nla_policy ethnl_header_policy_phy_stats[] = {
  45	[ETHTOOL_A_HEADER_DEV_INDEX]	= { .type = NLA_U32 },
  46	[ETHTOOL_A_HEADER_DEV_NAME]	= { .type = NLA_NUL_STRING,
  47					    .len = ALTIFNAMSIZ - 1 },
  48	[ETHTOOL_A_HEADER_FLAGS]	= NLA_POLICY_MASK(NLA_U32,
  49							  ETHTOOL_FLAGS_STATS),
  50	[ETHTOOL_A_HEADER_PHY_INDEX]		= NLA_POLICY_MIN(NLA_U32, 1),
  51};
  52
  53int ethnl_sock_priv_set(struct sk_buff *skb, struct net_device *dev, u32 portid,
  54			enum ethnl_sock_type type)
  55{
  56	struct ethnl_sock_priv *sk_priv;
  57
  58	sk_priv = genl_sk_priv_get(&ethtool_genl_family, NETLINK_CB(skb).sk);
  59	if (IS_ERR(sk_priv))
  60		return PTR_ERR(sk_priv);
  61
  62	sk_priv->dev = dev;
  63	sk_priv->portid = portid;
  64	sk_priv->type = type;
  65
  66	return 0;
  67}
  68
  69static void ethnl_sock_priv_destroy(void *priv)
  70{
  71	struct ethnl_sock_priv *sk_priv = priv;
  72
  73	switch (sk_priv->type) {
  74	case ETHTOOL_SOCK_TYPE_MODULE_FW_FLASH:
  75		ethnl_module_fw_flash_sock_destroy(sk_priv);
  76		break;
  77	default:
  78		break;
  79	}
  80}
  81
  82int ethnl_ops_begin(struct net_device *dev)
  83{
  84	int ret;
  85
  86	if (!dev)
  87		return -ENODEV;
  88
  89	if (dev->dev.parent)
  90		pm_runtime_get_sync(dev->dev.parent);
  91
  92	if (!netif_device_present(dev) ||
  93	    dev->reg_state >= NETREG_UNREGISTERING) {
  94		ret = -ENODEV;
  95		goto err;
  96	}
  97
  98	if (dev->ethtool_ops->begin) {
  99		ret = dev->ethtool_ops->begin(dev);
 100		if (ret)
 101			goto err;
 102	}
 103
 104	return 0;
 105err:
 106	if (dev->dev.parent)
 107		pm_runtime_put(dev->dev.parent);
 108
 109	return ret;
 110}
 111
 112void ethnl_ops_complete(struct net_device *dev)
 113{
 114	if (dev->ethtool_ops->complete)
 115		dev->ethtool_ops->complete(dev);
 116
 117	if (dev->dev.parent)
 118		pm_runtime_put(dev->dev.parent);
 119}
 120
 121/**
 122 * ethnl_parse_header_dev_get() - parse request header
 123 * @req_info:    structure to put results into
 124 * @header:      nest attribute with request header
 125 * @net:         request netns
 126 * @extack:      netlink extack for error reporting
 127 * @require_dev: fail if no device identified in header
 128 *
 129 * Parse request header in nested attribute @nest and puts results into
 130 * the structure pointed to by @req_info. Extack from @info is used for error
 131 * reporting. If req_info->dev is not null on return, reference to it has
 132 * been taken. If error is returned, *req_info is null initialized and no
 133 * reference is held.
 134 *
 135 * Return: 0 on success or negative error code
 136 */
 137int ethnl_parse_header_dev_get(struct ethnl_req_info *req_info,
 138			       const struct nlattr *header, struct net *net,
 139			       struct netlink_ext_ack *extack, bool require_dev)
 140{
 141	struct nlattr *tb[ARRAY_SIZE(ethnl_header_policy_phy)];
 142	const struct nlattr *devname_attr;
 143	struct net_device *dev = NULL;
 144	u32 flags = 0;
 145	int ret;
 146
 147	if (!header) {
 148		if (!require_dev)
 149			return 0;
 150		NL_SET_ERR_MSG(extack, "request header missing");
 151		return -EINVAL;
 152	}
 153	/* No validation here, command policy should have a nested policy set
 154	 * for the header, therefore validation should have already been done.
 155	 */
 156	ret = nla_parse_nested(tb, ARRAY_SIZE(ethnl_header_policy_phy) - 1, header,
 157			       NULL, extack);
 158	if (ret < 0)
 159		return ret;
 160	if (tb[ETHTOOL_A_HEADER_FLAGS])
 161		flags = nla_get_u32(tb[ETHTOOL_A_HEADER_FLAGS]);
 162
 163	devname_attr = tb[ETHTOOL_A_HEADER_DEV_NAME];
 164	if (tb[ETHTOOL_A_HEADER_DEV_INDEX]) {
 165		u32 ifindex = nla_get_u32(tb[ETHTOOL_A_HEADER_DEV_INDEX]);
 166
 167		dev = netdev_get_by_index(net, ifindex, &req_info->dev_tracker,
 168					  GFP_KERNEL);
 169		if (!dev) {
 170			NL_SET_ERR_MSG_ATTR(extack,
 171					    tb[ETHTOOL_A_HEADER_DEV_INDEX],
 172					    "no device matches ifindex");
 173			return -ENODEV;
 174		}
 175		/* if both ifindex and ifname are passed, they must match */
 176		if (devname_attr &&
 177		    strncmp(dev->name, nla_data(devname_attr), IFNAMSIZ)) {
 178			netdev_put(dev, &req_info->dev_tracker);
 179			NL_SET_ERR_MSG_ATTR(extack, header,
 180					    "ifindex and name do not match");
 181			return -ENODEV;
 182		}
 183	} else if (devname_attr) {
 184		dev = netdev_get_by_name(net, nla_data(devname_attr),
 185					 &req_info->dev_tracker, GFP_KERNEL);
 186		if (!dev) {
 187			NL_SET_ERR_MSG_ATTR(extack, devname_attr,
 188					    "no device matches name");
 189			return -ENODEV;
 190		}
 191	} else if (require_dev) {
 192		NL_SET_ERR_MSG_ATTR(extack, header,
 193				    "neither ifindex nor name specified");
 194		return -EINVAL;
 195	}
 196
 197	if (tb[ETHTOOL_A_HEADER_PHY_INDEX]) {
 198		if (dev) {
 199			req_info->phy_index = nla_get_u32(tb[ETHTOOL_A_HEADER_PHY_INDEX]);
 200		} else {
 201			NL_SET_ERR_MSG_ATTR(extack, header,
 202					    "phy_index set without a netdev");
 203			return -EINVAL;
 204		}
 205	}
 206
 207	req_info->dev = dev;
 
 
 208	req_info->flags = flags;
 209	return 0;
 210}
 211
 212struct phy_device *ethnl_req_get_phydev(const struct ethnl_req_info *req_info,
 213					struct nlattr **tb, unsigned int header,
 214					struct netlink_ext_ack *extack)
 215{
 216	struct phy_device *phydev;
 217
 218	ASSERT_RTNL();
 219
 220	if (!req_info->dev)
 221		return NULL;
 222
 223	if (!req_info->phy_index)
 224		return req_info->dev->phydev;
 225
 226	phydev = phy_link_topo_get_phy(req_info->dev, req_info->phy_index);
 227	if (!phydev && tb) {
 228		NL_SET_ERR_MSG_ATTR(extack, tb[header],
 229				    "no phy matching phyindex");
 230		return ERR_PTR(-ENODEV);
 231	}
 232
 233	return phydev;
 234}
 235
 236/**
 237 * ethnl_fill_reply_header() - Put common header into a reply message
 238 * @skb:      skb with the message
 239 * @dev:      network device to describe in header
 240 * @attrtype: attribute type to use for the nest
 241 *
 242 * Create a nested attribute with attributes describing given network device.
 243 *
 244 * Return: 0 on success, error value (-EMSGSIZE only) on error
 245 */
 246int ethnl_fill_reply_header(struct sk_buff *skb, struct net_device *dev,
 247			    u16 attrtype)
 248{
 249	struct nlattr *nest;
 250
 251	if (!dev)
 252		return 0;
 253	nest = nla_nest_start(skb, attrtype);
 254	if (!nest)
 255		return -EMSGSIZE;
 256
 257	if (nla_put_u32(skb, ETHTOOL_A_HEADER_DEV_INDEX, (u32)dev->ifindex) ||
 258	    nla_put_string(skb, ETHTOOL_A_HEADER_DEV_NAME, dev->name))
 259		goto nla_put_failure;
 260	/* If more attributes are put into reply header, ethnl_header_size()
 261	 * must be updated to account for them.
 262	 */
 263
 264	nla_nest_end(skb, nest);
 265	return 0;
 266
 267nla_put_failure:
 268	nla_nest_cancel(skb, nest);
 269	return -EMSGSIZE;
 270}
 271
 272/**
 273 * ethnl_reply_init() - Create skb for a reply and fill device identification
 274 * @payload:      payload length (without netlink and genetlink header)
 275 * @dev:          device the reply is about (may be null)
 276 * @cmd:          ETHTOOL_MSG_* message type for reply
 277 * @hdr_attrtype: attribute type for common header
 278 * @info:         genetlink info of the received packet we respond to
 279 * @ehdrp:        place to store payload pointer returned by genlmsg_new()
 280 *
 281 * Return: pointer to allocated skb on success, NULL on error
 282 */
 283struct sk_buff *ethnl_reply_init(size_t payload, struct net_device *dev, u8 cmd,
 284				 u16 hdr_attrtype, struct genl_info *info,
 285				 void **ehdrp)
 286{
 287	struct sk_buff *skb;
 288
 289	skb = genlmsg_new(payload, GFP_KERNEL);
 290	if (!skb)
 291		goto err;
 292	*ehdrp = genlmsg_put_reply(skb, info, &ethtool_genl_family, 0, cmd);
 293	if (!*ehdrp)
 294		goto err_free;
 295
 296	if (dev) {
 297		int ret;
 298
 299		ret = ethnl_fill_reply_header(skb, dev, hdr_attrtype);
 300		if (ret < 0)
 301			goto err_free;
 302	}
 303	return skb;
 304
 305err_free:
 306	nlmsg_free(skb);
 307err:
 308	if (info)
 309		GENL_SET_ERR_MSG(info, "failed to setup reply message");
 310	return NULL;
 311}
 312
 313void *ethnl_dump_put(struct sk_buff *skb, struct netlink_callback *cb, u8 cmd)
 314{
 315	return genlmsg_put(skb, NETLINK_CB(cb->skb).portid, cb->nlh->nlmsg_seq,
 316			   &ethtool_genl_family, 0, cmd);
 317}
 318
 319void *ethnl_bcastmsg_put(struct sk_buff *skb, u8 cmd)
 320{
 321	return genlmsg_put(skb, 0, ++ethnl_bcast_seq, &ethtool_genl_family, 0,
 322			   cmd);
 323}
 324
 325void *ethnl_unicast_put(struct sk_buff *skb, u32 portid, u32 seq, u8 cmd)
 326{
 327	return genlmsg_put(skb, portid, seq, &ethtool_genl_family, 0, cmd);
 328}
 329
 330int ethnl_multicast(struct sk_buff *skb, struct net_device *dev)
 331{
 332	return genlmsg_multicast_netns(&ethtool_genl_family, dev_net(dev), skb,
 333				       0, ETHNL_MCGRP_MONITOR, GFP_KERNEL);
 334}
 335
 336/* GET request helpers */
 337
 338/**
 339 * struct ethnl_dump_ctx - context structure for generic dumpit() callback
 340 * @ops:        request ops of currently processed message type
 341 * @req_info:   parsed request header of processed request
 342 * @reply_data: data needed to compose the reply
 343 * @pos_ifindex: saved iteration position - ifindex
 
 344 *
 345 * These parameters are kept in struct netlink_callback as context preserved
 346 * between iterations. They are initialized by ethnl_default_start() and used
 347 * in ethnl_default_dumpit() and ethnl_default_done().
 348 */
 349struct ethnl_dump_ctx {
 350	const struct ethnl_request_ops	*ops;
 351	struct ethnl_req_info		*req_info;
 352	struct ethnl_reply_data		*reply_data;
 353	unsigned long			pos_ifindex;
 
 354};
 355
 356static const struct ethnl_request_ops *
 357ethnl_default_requests[__ETHTOOL_MSG_USER_CNT] = {
 358	[ETHTOOL_MSG_STRSET_GET]	= &ethnl_strset_request_ops,
 359	[ETHTOOL_MSG_LINKINFO_GET]	= &ethnl_linkinfo_request_ops,
 360	[ETHTOOL_MSG_LINKINFO_SET]	= &ethnl_linkinfo_request_ops,
 361	[ETHTOOL_MSG_LINKMODES_GET]	= &ethnl_linkmodes_request_ops,
 362	[ETHTOOL_MSG_LINKMODES_SET]	= &ethnl_linkmodes_request_ops,
 363	[ETHTOOL_MSG_LINKSTATE_GET]	= &ethnl_linkstate_request_ops,
 364	[ETHTOOL_MSG_DEBUG_GET]		= &ethnl_debug_request_ops,
 365	[ETHTOOL_MSG_DEBUG_SET]		= &ethnl_debug_request_ops,
 366	[ETHTOOL_MSG_WOL_GET]		= &ethnl_wol_request_ops,
 367	[ETHTOOL_MSG_WOL_SET]		= &ethnl_wol_request_ops,
 368	[ETHTOOL_MSG_FEATURES_GET]	= &ethnl_features_request_ops,
 369	[ETHTOOL_MSG_PRIVFLAGS_GET]	= &ethnl_privflags_request_ops,
 370	[ETHTOOL_MSG_PRIVFLAGS_SET]	= &ethnl_privflags_request_ops,
 371	[ETHTOOL_MSG_RINGS_GET]		= &ethnl_rings_request_ops,
 372	[ETHTOOL_MSG_RINGS_SET]		= &ethnl_rings_request_ops,
 373	[ETHTOOL_MSG_CHANNELS_GET]	= &ethnl_channels_request_ops,
 374	[ETHTOOL_MSG_CHANNELS_SET]	= &ethnl_channels_request_ops,
 375	[ETHTOOL_MSG_COALESCE_GET]	= &ethnl_coalesce_request_ops,
 376	[ETHTOOL_MSG_COALESCE_SET]	= &ethnl_coalesce_request_ops,
 377	[ETHTOOL_MSG_PAUSE_GET]		= &ethnl_pause_request_ops,
 378	[ETHTOOL_MSG_PAUSE_SET]		= &ethnl_pause_request_ops,
 379	[ETHTOOL_MSG_EEE_GET]		= &ethnl_eee_request_ops,
 380	[ETHTOOL_MSG_EEE_SET]		= &ethnl_eee_request_ops,
 381	[ETHTOOL_MSG_FEC_GET]		= &ethnl_fec_request_ops,
 382	[ETHTOOL_MSG_FEC_SET]		= &ethnl_fec_request_ops,
 383	[ETHTOOL_MSG_TSINFO_GET]	= &ethnl_tsinfo_request_ops,
 384	[ETHTOOL_MSG_MODULE_EEPROM_GET]	= &ethnl_module_eeprom_request_ops,
 385	[ETHTOOL_MSG_STATS_GET]		= &ethnl_stats_request_ops,
 386	[ETHTOOL_MSG_PHC_VCLOCKS_GET]	= &ethnl_phc_vclocks_request_ops,
 387	[ETHTOOL_MSG_MODULE_GET]	= &ethnl_module_request_ops,
 388	[ETHTOOL_MSG_MODULE_SET]	= &ethnl_module_request_ops,
 389	[ETHTOOL_MSG_PSE_GET]		= &ethnl_pse_request_ops,
 390	[ETHTOOL_MSG_PSE_SET]		= &ethnl_pse_request_ops,
 391	[ETHTOOL_MSG_RSS_GET]		= &ethnl_rss_request_ops,
 392	[ETHTOOL_MSG_PLCA_GET_CFG]	= &ethnl_plca_cfg_request_ops,
 393	[ETHTOOL_MSG_PLCA_SET_CFG]	= &ethnl_plca_cfg_request_ops,
 394	[ETHTOOL_MSG_PLCA_GET_STATUS]	= &ethnl_plca_status_request_ops,
 395	[ETHTOOL_MSG_MM_GET]		= &ethnl_mm_request_ops,
 396	[ETHTOOL_MSG_MM_SET]		= &ethnl_mm_request_ops,
 397};
 398
 399static struct ethnl_dump_ctx *ethnl_dump_context(struct netlink_callback *cb)
 400{
 401	return (struct ethnl_dump_ctx *)cb->ctx;
 402}
 403
 404/**
 405 * ethnl_default_parse() - Parse request message
 406 * @req_info:    pointer to structure to put data into
 407 * @info:	 genl_info from the request
 
 408 * @request_ops: struct request_ops for request type
 
 409 * @require_dev: fail if no device identified in header
 410 *
 411 * Parse universal request header and call request specific ->parse_request()
 412 * callback (if defined) to parse the rest of the message.
 413 *
 414 * Return: 0 on success or negative error code
 415 */
 416static int ethnl_default_parse(struct ethnl_req_info *req_info,
 417			       const struct genl_info *info,
 418			       const struct ethnl_request_ops *request_ops,
 419			       bool require_dev)
 420{
 421	struct nlattr **tb = info->attrs;
 422	int ret;
 423
 424	ret = ethnl_parse_header_dev_get(req_info, tb[request_ops->hdr_attr],
 425					 genl_info_net(info), info->extack,
 426					 require_dev);
 427	if (ret < 0)
 428		return ret;
 429
 430	if (request_ops->parse_request) {
 431		ret = request_ops->parse_request(req_info, tb, info->extack);
 432		if (ret < 0)
 433			return ret;
 434	}
 435
 436	return 0;
 437}
 438
 439/**
 440 * ethnl_init_reply_data() - Initialize reply data for GET request
 441 * @reply_data: pointer to embedded struct ethnl_reply_data
 442 * @ops:        instance of struct ethnl_request_ops describing the layout
 443 * @dev:        network device to initialize the reply for
 444 *
 445 * Fills the reply data part with zeros and sets the dev member. Must be called
 446 * before calling the ->fill_reply() callback (for each iteration when handling
 447 * dump requests).
 448 */
 449static void ethnl_init_reply_data(struct ethnl_reply_data *reply_data,
 450				  const struct ethnl_request_ops *ops,
 451				  struct net_device *dev)
 452{
 453	memset(reply_data, 0, ops->reply_data_size);
 454	reply_data->dev = dev;
 455}
 456
 457/* default ->doit() handler for GET type requests */
 458static int ethnl_default_doit(struct sk_buff *skb, struct genl_info *info)
 459{
 460	struct ethnl_reply_data *reply_data = NULL;
 461	struct ethnl_req_info *req_info = NULL;
 462	const u8 cmd = info->genlhdr->cmd;
 463	const struct ethnl_request_ops *ops;
 464	int hdr_len, reply_len;
 465	struct sk_buff *rskb;
 466	void *reply_payload;
 467	int ret;
 468
 469	ops = ethnl_default_requests[cmd];
 470	if (WARN_ONCE(!ops, "cmd %u has no ethnl_request_ops\n", cmd))
 471		return -EOPNOTSUPP;
 472	if (GENL_REQ_ATTR_CHECK(info, ops->hdr_attr))
 473		return -EINVAL;
 474
 475	req_info = kzalloc(ops->req_info_size, GFP_KERNEL);
 476	if (!req_info)
 477		return -ENOMEM;
 478	reply_data = kmalloc(ops->reply_data_size, GFP_KERNEL);
 479	if (!reply_data) {
 480		kfree(req_info);
 481		return -ENOMEM;
 482	}
 483
 484	ret = ethnl_default_parse(req_info, info, ops, !ops->allow_nodev_do);
 
 485	if (ret < 0)
 486		goto err_dev;
 487	ethnl_init_reply_data(reply_data, ops, req_info->dev);
 488
 489	rtnl_lock();
 490	ret = ops->prepare_data(req_info, reply_data, info);
 491	rtnl_unlock();
 492	if (ret < 0)
 493		goto err_cleanup;
 494	ret = ops->reply_size(req_info, reply_data);
 495	if (ret < 0)
 496		goto err_cleanup;
 497	reply_len = ret;
 498	ret = -ENOMEM;
 499	rskb = ethnl_reply_init(reply_len + ethnl_reply_header_size(),
 500				req_info->dev, ops->reply_cmd,
 501				ops->hdr_attr, info, &reply_payload);
 502	if (!rskb)
 503		goto err_cleanup;
 504	hdr_len = rskb->len;
 505	ret = ops->fill_reply(rskb, req_info, reply_data);
 506	if (ret < 0)
 507		goto err_msg;
 508	WARN_ONCE(rskb->len - hdr_len > reply_len,
 509		  "ethnl cmd %d: calculated reply length %d, but consumed %d\n",
 510		  cmd, reply_len, rskb->len - hdr_len);
 511	if (ops->cleanup_data)
 512		ops->cleanup_data(reply_data);
 513
 514	genlmsg_end(rskb, reply_payload);
 515	netdev_put(req_info->dev, &req_info->dev_tracker);
 516	kfree(reply_data);
 517	kfree(req_info);
 518	return genlmsg_reply(rskb, info);
 519
 520err_msg:
 521	WARN_ONCE(ret == -EMSGSIZE, "calculated message payload length (%d) not sufficient\n", reply_len);
 522	nlmsg_free(rskb);
 523err_cleanup:
 524	if (ops->cleanup_data)
 525		ops->cleanup_data(reply_data);
 526err_dev:
 527	netdev_put(req_info->dev, &req_info->dev_tracker);
 528	kfree(reply_data);
 529	kfree(req_info);
 530	return ret;
 531}
 532
 533static int ethnl_default_dump_one(struct sk_buff *skb, struct net_device *dev,
 534				  const struct ethnl_dump_ctx *ctx,
 535				  const struct genl_info *info)
 536{
 537	void *ehdr;
 538	int ret;
 539
 540	ehdr = genlmsg_put(skb, info->snd_portid, info->snd_seq,
 541			   &ethtool_genl_family, NLM_F_MULTI,
 542			   ctx->ops->reply_cmd);
 543	if (!ehdr)
 544		return -EMSGSIZE;
 545
 546	ethnl_init_reply_data(ctx->reply_data, ctx->ops, dev);
 547	rtnl_lock();
 548	ret = ctx->ops->prepare_data(ctx->req_info, ctx->reply_data, info);
 549	rtnl_unlock();
 550	if (ret < 0)
 551		goto out;
 552	ret = ethnl_fill_reply_header(skb, dev, ctx->ops->hdr_attr);
 553	if (ret < 0)
 554		goto out;
 555	ret = ctx->ops->fill_reply(skb, ctx->req_info, ctx->reply_data);
 556
 557out:
 558	if (ctx->ops->cleanup_data)
 559		ctx->ops->cleanup_data(ctx->reply_data);
 560	ctx->reply_data->dev = NULL;
 561	if (ret < 0)
 562		genlmsg_cancel(skb, ehdr);
 563	else
 564		genlmsg_end(skb, ehdr);
 565	return ret;
 566}
 567
 568/* Default ->dumpit() handler for GET requests. */
 
 
 
 
 569static int ethnl_default_dumpit(struct sk_buff *skb,
 570				struct netlink_callback *cb)
 571{
 572	struct ethnl_dump_ctx *ctx = ethnl_dump_context(cb);
 573	struct net *net = sock_net(skb->sk);
 574	struct net_device *dev;
 
 575	int ret = 0;
 576
 577	rcu_read_lock();
 578	for_each_netdev_dump(net, dev, ctx->pos_ifindex) {
 579		dev_hold(dev);
 580		rcu_read_unlock();
 581
 582		ret = ethnl_default_dump_one(skb, dev, ctx, genl_info_dump(cb));
 583
 584		rcu_read_lock();
 585		dev_put(dev);
 586
 587		if (ret < 0 && ret != -EOPNOTSUPP) {
 588			if (likely(skb->len))
 589				ret = skb->len;
 590			break;
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 591		}
 592		ret = 0;
 593	}
 594	rcu_read_unlock();
 
 
 
 
 
 595
 596	return ret;
 597}
 598
 599/* generic ->start() handler for GET requests */
 600static int ethnl_default_start(struct netlink_callback *cb)
 601{
 602	const struct genl_dumpit_info *info = genl_dumpit_info(cb);
 603	struct ethnl_dump_ctx *ctx = ethnl_dump_context(cb);
 604	struct ethnl_reply_data *reply_data;
 605	const struct ethnl_request_ops *ops;
 606	struct ethnl_req_info *req_info;
 607	struct genlmsghdr *ghdr;
 608	int ret;
 609
 610	BUILD_BUG_ON(sizeof(*ctx) > sizeof(cb->ctx));
 611
 612	ghdr = nlmsg_data(cb->nlh);
 613	ops = ethnl_default_requests[ghdr->cmd];
 614	if (WARN_ONCE(!ops, "cmd %u has no ethnl_request_ops\n", ghdr->cmd))
 615		return -EOPNOTSUPP;
 616	req_info = kzalloc(ops->req_info_size, GFP_KERNEL);
 617	if (!req_info)
 618		return -ENOMEM;
 619	reply_data = kmalloc(ops->reply_data_size, GFP_KERNEL);
 620	if (!reply_data) {
 621		ret = -ENOMEM;
 622		goto free_req_info;
 623	}
 624
 625	ret = ethnl_default_parse(req_info, &info->info, ops, false);
 
 626	if (req_info->dev) {
 627		/* We ignore device specification in dump requests but as the
 628		 * same parser as for non-dump (doit) requests is used, it
 629		 * would take reference to the device if it finds one
 630		 */
 631		netdev_put(req_info->dev, &req_info->dev_tracker);
 632		req_info->dev = NULL;
 633	}
 634	if (ret < 0)
 635		goto free_reply_data;
 636
 637	ctx->ops = ops;
 638	ctx->req_info = req_info;
 639	ctx->reply_data = reply_data;
 640	ctx->pos_ifindex = 0;
 
 641
 642	return 0;
 643
 644free_reply_data:
 645	kfree(reply_data);
 646free_req_info:
 647	kfree(req_info);
 648
 649	return ret;
 650}
 651
 652/* default ->done() handler for GET requests */
 653static int ethnl_default_done(struct netlink_callback *cb)
 654{
 655	struct ethnl_dump_ctx *ctx = ethnl_dump_context(cb);
 656
 657	kfree(ctx->reply_data);
 658	kfree(ctx->req_info);
 659
 660	return 0;
 661}
 662
 663static int ethnl_default_set_doit(struct sk_buff *skb, struct genl_info *info)
 664{
 665	const struct ethnl_request_ops *ops;
 666	struct ethnl_req_info req_info = {};
 667	const u8 cmd = info->genlhdr->cmd;
 668	int ret;
 669
 670	ops = ethnl_default_requests[cmd];
 671	if (WARN_ONCE(!ops, "cmd %u has no ethnl_request_ops\n", cmd))
 672		return -EOPNOTSUPP;
 673	if (GENL_REQ_ATTR_CHECK(info, ops->hdr_attr))
 674		return -EINVAL;
 675
 676	ret = ethnl_parse_header_dev_get(&req_info, info->attrs[ops->hdr_attr],
 677					 genl_info_net(info), info->extack,
 678					 true);
 679	if (ret < 0)
 680		return ret;
 681
 682	if (ops->set_validate) {
 683		ret = ops->set_validate(&req_info, info);
 684		/* 0 means nothing to do */
 685		if (ret <= 0)
 686			goto out_dev;
 687	}
 688
 689	rtnl_lock();
 690	ret = ethnl_ops_begin(req_info.dev);
 691	if (ret < 0)
 692		goto out_rtnl;
 693
 694	ret = ops->set(&req_info, info);
 695	if (ret <= 0)
 696		goto out_ops;
 697	ethtool_notify(req_info.dev, ops->set_ntf_cmd, NULL);
 698
 699	ret = 0;
 700out_ops:
 701	ethnl_ops_complete(req_info.dev);
 702out_rtnl:
 703	rtnl_unlock();
 704out_dev:
 705	ethnl_parse_header_dev_put(&req_info);
 706	return ret;
 707}
 708
 709static const struct ethnl_request_ops *
 710ethnl_default_notify_ops[ETHTOOL_MSG_KERNEL_MAX + 1] = {
 711	[ETHTOOL_MSG_LINKINFO_NTF]	= &ethnl_linkinfo_request_ops,
 712	[ETHTOOL_MSG_LINKMODES_NTF]	= &ethnl_linkmodes_request_ops,
 713	[ETHTOOL_MSG_DEBUG_NTF]		= &ethnl_debug_request_ops,
 714	[ETHTOOL_MSG_WOL_NTF]		= &ethnl_wol_request_ops,
 715	[ETHTOOL_MSG_FEATURES_NTF]	= &ethnl_features_request_ops,
 716	[ETHTOOL_MSG_PRIVFLAGS_NTF]	= &ethnl_privflags_request_ops,
 717	[ETHTOOL_MSG_RINGS_NTF]		= &ethnl_rings_request_ops,
 718	[ETHTOOL_MSG_CHANNELS_NTF]	= &ethnl_channels_request_ops,
 719	[ETHTOOL_MSG_COALESCE_NTF]	= &ethnl_coalesce_request_ops,
 720	[ETHTOOL_MSG_PAUSE_NTF]		= &ethnl_pause_request_ops,
 721	[ETHTOOL_MSG_EEE_NTF]		= &ethnl_eee_request_ops,
 722	[ETHTOOL_MSG_FEC_NTF]		= &ethnl_fec_request_ops,
 723	[ETHTOOL_MSG_MODULE_NTF]	= &ethnl_module_request_ops,
 724	[ETHTOOL_MSG_PLCA_NTF]		= &ethnl_plca_cfg_request_ops,
 725	[ETHTOOL_MSG_MM_NTF]		= &ethnl_mm_request_ops,
 726};
 727
 728/* default notification handler */
 729static void ethnl_default_notify(struct net_device *dev, unsigned int cmd,
 730				 const void *data)
 731{
 732	struct ethnl_reply_data *reply_data;
 733	const struct ethnl_request_ops *ops;
 734	struct ethnl_req_info *req_info;
 735	struct genl_info info;
 736	struct sk_buff *skb;
 737	void *reply_payload;
 738	int reply_len;
 739	int ret;
 740
 741	genl_info_init_ntf(&info, &ethtool_genl_family, cmd);
 742
 743	if (WARN_ONCE(cmd > ETHTOOL_MSG_KERNEL_MAX ||
 744		      !ethnl_default_notify_ops[cmd],
 745		      "unexpected notification type %u\n", cmd))
 746		return;
 747	ops = ethnl_default_notify_ops[cmd];
 748	req_info = kzalloc(ops->req_info_size, GFP_KERNEL);
 749	if (!req_info)
 750		return;
 751	reply_data = kmalloc(ops->reply_data_size, GFP_KERNEL);
 752	if (!reply_data) {
 753		kfree(req_info);
 754		return;
 755	}
 756
 757	req_info->dev = dev;
 758	req_info->flags |= ETHTOOL_FLAG_COMPACT_BITSETS;
 759
 760	ethnl_init_reply_data(reply_data, ops, dev);
 761	ret = ops->prepare_data(req_info, reply_data, &info);
 762	if (ret < 0)
 763		goto err_cleanup;
 764	ret = ops->reply_size(req_info, reply_data);
 765	if (ret < 0)
 766		goto err_cleanup;
 767	reply_len = ret + ethnl_reply_header_size();
 768	skb = genlmsg_new(reply_len, GFP_KERNEL);
 769	if (!skb)
 770		goto err_cleanup;
 771	reply_payload = ethnl_bcastmsg_put(skb, cmd);
 772	if (!reply_payload)
 773		goto err_skb;
 774	ret = ethnl_fill_reply_header(skb, dev, ops->hdr_attr);
 775	if (ret < 0)
 776		goto err_msg;
 777	ret = ops->fill_reply(skb, req_info, reply_data);
 778	if (ret < 0)
 779		goto err_msg;
 780	if (ops->cleanup_data)
 781		ops->cleanup_data(reply_data);
 782
 783	genlmsg_end(skb, reply_payload);
 784	kfree(reply_data);
 785	kfree(req_info);
 786	ethnl_multicast(skb, dev);
 787	return;
 788
 789err_msg:
 790	WARN_ONCE(ret == -EMSGSIZE,
 791		  "calculated message payload length (%d) not sufficient\n",
 792		  reply_len);
 793err_skb:
 794	nlmsg_free(skb);
 795err_cleanup:
 796	if (ops->cleanup_data)
 797		ops->cleanup_data(reply_data);
 798	kfree(reply_data);
 799	kfree(req_info);
 800	return;
 801}
 802
 803/* notifications */
 804
 805typedef void (*ethnl_notify_handler_t)(struct net_device *dev, unsigned int cmd,
 806				       const void *data);
 807
 808static const ethnl_notify_handler_t ethnl_notify_handlers[] = {
 809	[ETHTOOL_MSG_LINKINFO_NTF]	= ethnl_default_notify,
 810	[ETHTOOL_MSG_LINKMODES_NTF]	= ethnl_default_notify,
 811	[ETHTOOL_MSG_DEBUG_NTF]		= ethnl_default_notify,
 812	[ETHTOOL_MSG_WOL_NTF]		= ethnl_default_notify,
 813	[ETHTOOL_MSG_FEATURES_NTF]	= ethnl_default_notify,
 814	[ETHTOOL_MSG_PRIVFLAGS_NTF]	= ethnl_default_notify,
 815	[ETHTOOL_MSG_RINGS_NTF]		= ethnl_default_notify,
 816	[ETHTOOL_MSG_CHANNELS_NTF]	= ethnl_default_notify,
 817	[ETHTOOL_MSG_COALESCE_NTF]	= ethnl_default_notify,
 818	[ETHTOOL_MSG_PAUSE_NTF]		= ethnl_default_notify,
 819	[ETHTOOL_MSG_EEE_NTF]		= ethnl_default_notify,
 820	[ETHTOOL_MSG_FEC_NTF]		= ethnl_default_notify,
 821	[ETHTOOL_MSG_MODULE_NTF]	= ethnl_default_notify,
 822	[ETHTOOL_MSG_PLCA_NTF]		= ethnl_default_notify,
 823	[ETHTOOL_MSG_MM_NTF]		= ethnl_default_notify,
 824};
 825
 826void ethtool_notify(struct net_device *dev, unsigned int cmd, const void *data)
 827{
 828	if (unlikely(!ethnl_ok))
 829		return;
 830	ASSERT_RTNL();
 831
 832	if (likely(cmd < ARRAY_SIZE(ethnl_notify_handlers) &&
 833		   ethnl_notify_handlers[cmd]))
 834		ethnl_notify_handlers[cmd](dev, cmd, data);
 835	else
 836		WARN_ONCE(1, "notification %u not implemented (dev=%s)\n",
 837			  cmd, netdev_name(dev));
 838}
 839EXPORT_SYMBOL(ethtool_notify);
 840
 841static void ethnl_notify_features(struct netdev_notifier_info *info)
 842{
 843	struct net_device *dev = netdev_notifier_info_to_dev(info);
 844
 845	ethtool_notify(dev, ETHTOOL_MSG_FEATURES_NTF, NULL);
 846}
 847
 848static int ethnl_netdev_event(struct notifier_block *this, unsigned long event,
 849			      void *ptr)
 850{
 851	struct netdev_notifier_info *info = ptr;
 852	struct netlink_ext_ack *extack;
 853	struct net_device *dev;
 854
 855	dev = netdev_notifier_info_to_dev(info);
 856	extack = netdev_notifier_info_to_extack(info);
 857
 858	switch (event) {
 859	case NETDEV_FEAT_CHANGE:
 860		ethnl_notify_features(ptr);
 861		break;
 862	case NETDEV_PRE_UP:
 863		if (dev->ethtool->module_fw_flash_in_progress) {
 864			NL_SET_ERR_MSG(extack, "Can't set port up while flashing module firmware");
 865			return NOTIFY_BAD;
 866		}
 867	}
 868
 869	return NOTIFY_DONE;
 870}
 871
 872static struct notifier_block ethnl_netdev_notifier = {
 873	.notifier_call = ethnl_netdev_event,
 874};
 875
 876/* genetlink setup */
 877
 878static const struct genl_ops ethtool_genl_ops[] = {
 879	{
 880		.cmd	= ETHTOOL_MSG_STRSET_GET,
 881		.doit	= ethnl_default_doit,
 882		.start	= ethnl_default_start,
 883		.dumpit	= ethnl_default_dumpit,
 884		.done	= ethnl_default_done,
 885		.policy = ethnl_strset_get_policy,
 886		.maxattr = ARRAY_SIZE(ethnl_strset_get_policy) - 1,
 887	},
 888	{
 889		.cmd	= ETHTOOL_MSG_LINKINFO_GET,
 890		.doit	= ethnl_default_doit,
 891		.start	= ethnl_default_start,
 892		.dumpit	= ethnl_default_dumpit,
 893		.done	= ethnl_default_done,
 894		.policy = ethnl_linkinfo_get_policy,
 895		.maxattr = ARRAY_SIZE(ethnl_linkinfo_get_policy) - 1,
 896	},
 897	{
 898		.cmd	= ETHTOOL_MSG_LINKINFO_SET,
 899		.flags	= GENL_UNS_ADMIN_PERM,
 900		.doit	= ethnl_default_set_doit,
 901		.policy = ethnl_linkinfo_set_policy,
 902		.maxattr = ARRAY_SIZE(ethnl_linkinfo_set_policy) - 1,
 903	},
 904	{
 905		.cmd	= ETHTOOL_MSG_LINKMODES_GET,
 906		.doit	= ethnl_default_doit,
 907		.start	= ethnl_default_start,
 908		.dumpit	= ethnl_default_dumpit,
 909		.done	= ethnl_default_done,
 910		.policy = ethnl_linkmodes_get_policy,
 911		.maxattr = ARRAY_SIZE(ethnl_linkmodes_get_policy) - 1,
 912	},
 913	{
 914		.cmd	= ETHTOOL_MSG_LINKMODES_SET,
 915		.flags	= GENL_UNS_ADMIN_PERM,
 916		.doit	= ethnl_default_set_doit,
 917		.policy = ethnl_linkmodes_set_policy,
 918		.maxattr = ARRAY_SIZE(ethnl_linkmodes_set_policy) - 1,
 919	},
 920	{
 921		.cmd	= ETHTOOL_MSG_LINKSTATE_GET,
 922		.doit	= ethnl_default_doit,
 923		.start	= ethnl_default_start,
 924		.dumpit	= ethnl_default_dumpit,
 925		.done	= ethnl_default_done,
 926		.policy = ethnl_linkstate_get_policy,
 927		.maxattr = ARRAY_SIZE(ethnl_linkstate_get_policy) - 1,
 928	},
 929	{
 930		.cmd	= ETHTOOL_MSG_DEBUG_GET,
 931		.doit	= ethnl_default_doit,
 932		.start	= ethnl_default_start,
 933		.dumpit	= ethnl_default_dumpit,
 934		.done	= ethnl_default_done,
 935		.policy = ethnl_debug_get_policy,
 936		.maxattr = ARRAY_SIZE(ethnl_debug_get_policy) - 1,
 937	},
 938	{
 939		.cmd	= ETHTOOL_MSG_DEBUG_SET,
 940		.flags	= GENL_UNS_ADMIN_PERM,
 941		.doit	= ethnl_default_set_doit,
 942		.policy = ethnl_debug_set_policy,
 943		.maxattr = ARRAY_SIZE(ethnl_debug_set_policy) - 1,
 944	},
 945	{
 946		.cmd	= ETHTOOL_MSG_WOL_GET,
 947		.flags	= GENL_UNS_ADMIN_PERM,
 948		.doit	= ethnl_default_doit,
 949		.start	= ethnl_default_start,
 950		.dumpit	= ethnl_default_dumpit,
 951		.done	= ethnl_default_done,
 952		.policy = ethnl_wol_get_policy,
 953		.maxattr = ARRAY_SIZE(ethnl_wol_get_policy) - 1,
 954	},
 955	{
 956		.cmd	= ETHTOOL_MSG_WOL_SET,
 957		.flags	= GENL_UNS_ADMIN_PERM,
 958		.doit	= ethnl_default_set_doit,
 959		.policy = ethnl_wol_set_policy,
 960		.maxattr = ARRAY_SIZE(ethnl_wol_set_policy) - 1,
 961	},
 962	{
 963		.cmd	= ETHTOOL_MSG_FEATURES_GET,
 964		.doit	= ethnl_default_doit,
 965		.start	= ethnl_default_start,
 966		.dumpit	= ethnl_default_dumpit,
 967		.done	= ethnl_default_done,
 968		.policy = ethnl_features_get_policy,
 969		.maxattr = ARRAY_SIZE(ethnl_features_get_policy) - 1,
 970	},
 971	{
 972		.cmd	= ETHTOOL_MSG_FEATURES_SET,
 973		.flags	= GENL_UNS_ADMIN_PERM,
 974		.doit	= ethnl_set_features,
 975		.policy = ethnl_features_set_policy,
 976		.maxattr = ARRAY_SIZE(ethnl_features_set_policy) - 1,
 977	},
 978	{
 979		.cmd	= ETHTOOL_MSG_PRIVFLAGS_GET,
 980		.doit	= ethnl_default_doit,
 981		.start	= ethnl_default_start,
 982		.dumpit	= ethnl_default_dumpit,
 983		.done	= ethnl_default_done,
 984		.policy = ethnl_privflags_get_policy,
 985		.maxattr = ARRAY_SIZE(ethnl_privflags_get_policy) - 1,
 986	},
 987	{
 988		.cmd	= ETHTOOL_MSG_PRIVFLAGS_SET,
 989		.flags	= GENL_UNS_ADMIN_PERM,
 990		.doit	= ethnl_default_set_doit,
 991		.policy = ethnl_privflags_set_policy,
 992		.maxattr = ARRAY_SIZE(ethnl_privflags_set_policy) - 1,
 993	},
 994	{
 995		.cmd	= ETHTOOL_MSG_RINGS_GET,
 996		.doit	= ethnl_default_doit,
 997		.start	= ethnl_default_start,
 998		.dumpit	= ethnl_default_dumpit,
 999		.done	= ethnl_default_done,
1000		.policy = ethnl_rings_get_policy,
1001		.maxattr = ARRAY_SIZE(ethnl_rings_get_policy) - 1,
1002	},
1003	{
1004		.cmd	= ETHTOOL_MSG_RINGS_SET,
1005		.flags	= GENL_UNS_ADMIN_PERM,
1006		.doit	= ethnl_default_set_doit,
1007		.policy = ethnl_rings_set_policy,
1008		.maxattr = ARRAY_SIZE(ethnl_rings_set_policy) - 1,
1009	},
1010	{
1011		.cmd	= ETHTOOL_MSG_CHANNELS_GET,
1012		.doit	= ethnl_default_doit,
1013		.start	= ethnl_default_start,
1014		.dumpit	= ethnl_default_dumpit,
1015		.done	= ethnl_default_done,
1016		.policy = ethnl_channels_get_policy,
1017		.maxattr = ARRAY_SIZE(ethnl_channels_get_policy) - 1,
1018	},
1019	{
1020		.cmd	= ETHTOOL_MSG_CHANNELS_SET,
1021		.flags	= GENL_UNS_ADMIN_PERM,
1022		.doit	= ethnl_default_set_doit,
1023		.policy = ethnl_channels_set_policy,
1024		.maxattr = ARRAY_SIZE(ethnl_channels_set_policy) - 1,
1025	},
1026	{
1027		.cmd	= ETHTOOL_MSG_COALESCE_GET,
1028		.doit	= ethnl_default_doit,
1029		.start	= ethnl_default_start,
1030		.dumpit	= ethnl_default_dumpit,
1031		.done	= ethnl_default_done,
1032		.policy = ethnl_coalesce_get_policy,
1033		.maxattr = ARRAY_SIZE(ethnl_coalesce_get_policy) - 1,
1034	},
1035	{
1036		.cmd	= ETHTOOL_MSG_COALESCE_SET,
1037		.flags	= GENL_UNS_ADMIN_PERM,
1038		.doit	= ethnl_default_set_doit,
1039		.policy = ethnl_coalesce_set_policy,
1040		.maxattr = ARRAY_SIZE(ethnl_coalesce_set_policy) - 1,
1041	},
1042	{
1043		.cmd	= ETHTOOL_MSG_PAUSE_GET,
1044		.doit	= ethnl_default_doit,
1045		.start	= ethnl_default_start,
1046		.dumpit	= ethnl_default_dumpit,
1047		.done	= ethnl_default_done,
1048		.policy = ethnl_pause_get_policy,
1049		.maxattr = ARRAY_SIZE(ethnl_pause_get_policy) - 1,
1050	},
1051	{
1052		.cmd	= ETHTOOL_MSG_PAUSE_SET,
1053		.flags	= GENL_UNS_ADMIN_PERM,
1054		.doit	= ethnl_default_set_doit,
1055		.policy = ethnl_pause_set_policy,
1056		.maxattr = ARRAY_SIZE(ethnl_pause_set_policy) - 1,
1057	},
1058	{
1059		.cmd	= ETHTOOL_MSG_EEE_GET,
1060		.doit	= ethnl_default_doit,
1061		.start	= ethnl_default_start,
1062		.dumpit	= ethnl_default_dumpit,
1063		.done	= ethnl_default_done,
1064		.policy = ethnl_eee_get_policy,
1065		.maxattr = ARRAY_SIZE(ethnl_eee_get_policy) - 1,
1066	},
1067	{
1068		.cmd	= ETHTOOL_MSG_EEE_SET,
1069		.flags	= GENL_UNS_ADMIN_PERM,
1070		.doit	= ethnl_default_set_doit,
1071		.policy = ethnl_eee_set_policy,
1072		.maxattr = ARRAY_SIZE(ethnl_eee_set_policy) - 1,
1073	},
1074	{
1075		.cmd	= ETHTOOL_MSG_TSINFO_GET,
1076		.doit	= ethnl_default_doit,
1077		.start	= ethnl_default_start,
1078		.dumpit	= ethnl_default_dumpit,
1079		.done	= ethnl_default_done,
1080		.policy = ethnl_tsinfo_get_policy,
1081		.maxattr = ARRAY_SIZE(ethnl_tsinfo_get_policy) - 1,
1082	},
1083	{
1084		.cmd	= ETHTOOL_MSG_CABLE_TEST_ACT,
1085		.flags	= GENL_UNS_ADMIN_PERM,
1086		.doit	= ethnl_act_cable_test,
1087		.policy = ethnl_cable_test_act_policy,
1088		.maxattr = ARRAY_SIZE(ethnl_cable_test_act_policy) - 1,
1089	},
1090	{
1091		.cmd	= ETHTOOL_MSG_CABLE_TEST_TDR_ACT,
1092		.flags	= GENL_UNS_ADMIN_PERM,
1093		.doit	= ethnl_act_cable_test_tdr,
1094		.policy = ethnl_cable_test_tdr_act_policy,
1095		.maxattr = ARRAY_SIZE(ethnl_cable_test_tdr_act_policy) - 1,
1096	},
1097	{
1098		.cmd	= ETHTOOL_MSG_TUNNEL_INFO_GET,
1099		.doit	= ethnl_tunnel_info_doit,
1100		.start	= ethnl_tunnel_info_start,
1101		.dumpit	= ethnl_tunnel_info_dumpit,
1102		.policy = ethnl_tunnel_info_get_policy,
1103		.maxattr = ARRAY_SIZE(ethnl_tunnel_info_get_policy) - 1,
1104	},
1105	{
1106		.cmd	= ETHTOOL_MSG_FEC_GET,
1107		.doit	= ethnl_default_doit,
1108		.start	= ethnl_default_start,
1109		.dumpit	= ethnl_default_dumpit,
1110		.done	= ethnl_default_done,
1111		.policy = ethnl_fec_get_policy,
1112		.maxattr = ARRAY_SIZE(ethnl_fec_get_policy) - 1,
1113	},
1114	{
1115		.cmd	= ETHTOOL_MSG_FEC_SET,
1116		.flags	= GENL_UNS_ADMIN_PERM,
1117		.doit	= ethnl_default_set_doit,
1118		.policy = ethnl_fec_set_policy,
1119		.maxattr = ARRAY_SIZE(ethnl_fec_set_policy) - 1,
1120	},
1121	{
1122		.cmd	= ETHTOOL_MSG_MODULE_EEPROM_GET,
1123		.flags  = GENL_UNS_ADMIN_PERM,
1124		.doit	= ethnl_default_doit,
1125		.start	= ethnl_default_start,
1126		.dumpit	= ethnl_default_dumpit,
1127		.done	= ethnl_default_done,
1128		.policy = ethnl_module_eeprom_get_policy,
1129		.maxattr = ARRAY_SIZE(ethnl_module_eeprom_get_policy) - 1,
1130	},
1131	{
1132		.cmd	= ETHTOOL_MSG_STATS_GET,
1133		.doit	= ethnl_default_doit,
1134		.start	= ethnl_default_start,
1135		.dumpit	= ethnl_default_dumpit,
1136		.done	= ethnl_default_done,
1137		.policy = ethnl_stats_get_policy,
1138		.maxattr = ARRAY_SIZE(ethnl_stats_get_policy) - 1,
1139	},
1140	{
1141		.cmd	= ETHTOOL_MSG_PHC_VCLOCKS_GET,
1142		.doit	= ethnl_default_doit,
1143		.start	= ethnl_default_start,
1144		.dumpit	= ethnl_default_dumpit,
1145		.done	= ethnl_default_done,
1146		.policy = ethnl_phc_vclocks_get_policy,
1147		.maxattr = ARRAY_SIZE(ethnl_phc_vclocks_get_policy) - 1,
1148	},
1149	{
1150		.cmd	= ETHTOOL_MSG_MODULE_GET,
1151		.doit	= ethnl_default_doit,
1152		.start	= ethnl_default_start,
1153		.dumpit	= ethnl_default_dumpit,
1154		.done	= ethnl_default_done,
1155		.policy = ethnl_module_get_policy,
1156		.maxattr = ARRAY_SIZE(ethnl_module_get_policy) - 1,
1157	},
1158	{
1159		.cmd	= ETHTOOL_MSG_MODULE_SET,
1160		.flags	= GENL_UNS_ADMIN_PERM,
1161		.doit	= ethnl_default_set_doit,
1162		.policy = ethnl_module_set_policy,
1163		.maxattr = ARRAY_SIZE(ethnl_module_set_policy) - 1,
1164	},
1165	{
1166		.cmd	= ETHTOOL_MSG_PSE_GET,
1167		.doit	= ethnl_default_doit,
1168		.start	= ethnl_default_start,
1169		.dumpit	= ethnl_default_dumpit,
1170		.done	= ethnl_default_done,
1171		.policy = ethnl_pse_get_policy,
1172		.maxattr = ARRAY_SIZE(ethnl_pse_get_policy) - 1,
1173	},
1174	{
1175		.cmd	= ETHTOOL_MSG_PSE_SET,
1176		.flags	= GENL_UNS_ADMIN_PERM,
1177		.doit	= ethnl_default_set_doit,
1178		.policy = ethnl_pse_set_policy,
1179		.maxattr = ARRAY_SIZE(ethnl_pse_set_policy) - 1,
1180	},
1181	{
1182		.cmd	= ETHTOOL_MSG_RSS_GET,
1183		.doit	= ethnl_default_doit,
1184		.start	= ethnl_rss_dump_start,
1185		.dumpit	= ethnl_rss_dumpit,
1186		.policy = ethnl_rss_get_policy,
1187		.maxattr = ARRAY_SIZE(ethnl_rss_get_policy) - 1,
1188	},
1189	{
1190		.cmd	= ETHTOOL_MSG_PLCA_GET_CFG,
1191		.doit	= ethnl_default_doit,
1192		.start	= ethnl_default_start,
1193		.dumpit	= ethnl_default_dumpit,
1194		.done	= ethnl_default_done,
1195		.policy = ethnl_plca_get_cfg_policy,
1196		.maxattr = ARRAY_SIZE(ethnl_plca_get_cfg_policy) - 1,
1197	},
1198	{
1199		.cmd	= ETHTOOL_MSG_PLCA_SET_CFG,
1200		.flags	= GENL_UNS_ADMIN_PERM,
1201		.doit	= ethnl_default_set_doit,
1202		.policy = ethnl_plca_set_cfg_policy,
1203		.maxattr = ARRAY_SIZE(ethnl_plca_set_cfg_policy) - 1,
1204	},
1205	{
1206		.cmd	= ETHTOOL_MSG_PLCA_GET_STATUS,
1207		.doit	= ethnl_default_doit,
1208		.start	= ethnl_default_start,
1209		.dumpit	= ethnl_default_dumpit,
1210		.done	= ethnl_default_done,
1211		.policy = ethnl_plca_get_status_policy,
1212		.maxattr = ARRAY_SIZE(ethnl_plca_get_status_policy) - 1,
1213	},
1214	{
1215		.cmd	= ETHTOOL_MSG_MM_GET,
1216		.doit	= ethnl_default_doit,
1217		.start	= ethnl_default_start,
1218		.dumpit	= ethnl_default_dumpit,
1219		.done	= ethnl_default_done,
1220		.policy = ethnl_mm_get_policy,
1221		.maxattr = ARRAY_SIZE(ethnl_mm_get_policy) - 1,
1222	},
1223	{
1224		.cmd	= ETHTOOL_MSG_MM_SET,
1225		.flags	= GENL_UNS_ADMIN_PERM,
1226		.doit	= ethnl_default_set_doit,
1227		.policy = ethnl_mm_set_policy,
1228		.maxattr = ARRAY_SIZE(ethnl_mm_set_policy) - 1,
1229	},
1230	{
1231		.cmd	= ETHTOOL_MSG_MODULE_FW_FLASH_ACT,
1232		.flags	= GENL_UNS_ADMIN_PERM,
1233		.doit	= ethnl_act_module_fw_flash,
1234		.policy	= ethnl_module_fw_flash_act_policy,
1235		.maxattr = ARRAY_SIZE(ethnl_module_fw_flash_act_policy) - 1,
1236	},
1237	{
1238		.cmd	= ETHTOOL_MSG_PHY_GET,
1239		.doit	= ethnl_phy_doit,
1240		.start	= ethnl_phy_start,
1241		.dumpit	= ethnl_phy_dumpit,
1242		.done	= ethnl_phy_done,
1243		.policy = ethnl_phy_get_policy,
1244		.maxattr = ARRAY_SIZE(ethnl_phy_get_policy) - 1,
1245	},
1246};
1247
1248static const struct genl_multicast_group ethtool_nl_mcgrps[] = {
1249	[ETHNL_MCGRP_MONITOR] = { .name = ETHTOOL_MCGRP_MONITOR_NAME },
1250};
1251
1252static struct genl_family ethtool_genl_family __ro_after_init = {
1253	.name		= ETHTOOL_GENL_NAME,
1254	.version	= ETHTOOL_GENL_VERSION,
1255	.netnsok	= true,
1256	.parallel_ops	= true,
1257	.ops		= ethtool_genl_ops,
1258	.n_ops		= ARRAY_SIZE(ethtool_genl_ops),
1259	.resv_start_op	= ETHTOOL_MSG_MODULE_GET + 1,
1260	.mcgrps		= ethtool_nl_mcgrps,
1261	.n_mcgrps	= ARRAY_SIZE(ethtool_nl_mcgrps),
1262	.sock_priv_size		= sizeof(struct ethnl_sock_priv),
1263	.sock_priv_destroy	= ethnl_sock_priv_destroy,
1264};
1265
1266/* module setup */
1267
1268static int __init ethnl_init(void)
1269{
1270	int ret;
1271
1272	ret = genl_register_family(&ethtool_genl_family);
1273	if (WARN(ret < 0, "ethtool: genetlink family registration failed"))
1274		return ret;
1275	ethnl_ok = true;
1276
1277	ret = register_netdevice_notifier(&ethnl_netdev_notifier);
1278	WARN(ret < 0, "ethtool: net device notifier registration failed");
1279	return ret;
1280}
1281
1282subsys_initcall(ethnl_init);
v6.2
   1// SPDX-License-Identifier: GPL-2.0-only
   2
   3#include <net/sock.h>
   4#include <linux/ethtool_netlink.h>
 
   5#include <linux/pm_runtime.h>
   6#include "netlink.h"
 
   7
   8static struct genl_family ethtool_genl_family;
   9
  10static bool ethnl_ok __read_mostly;
  11static u32 ethnl_bcast_seq;
  12
  13#define ETHTOOL_FLAGS_BASIC (ETHTOOL_FLAG_COMPACT_BITSETS |	\
  14			     ETHTOOL_FLAG_OMIT_REPLY)
  15#define ETHTOOL_FLAGS_STATS (ETHTOOL_FLAGS_BASIC | ETHTOOL_FLAG_STATS)
  16
  17const struct nla_policy ethnl_header_policy[] = {
  18	[ETHTOOL_A_HEADER_DEV_INDEX]	= { .type = NLA_U32 },
  19	[ETHTOOL_A_HEADER_DEV_NAME]	= { .type = NLA_NUL_STRING,
  20					    .len = ALTIFNAMSIZ - 1 },
  21	[ETHTOOL_A_HEADER_FLAGS]	= NLA_POLICY_MASK(NLA_U32,
  22							  ETHTOOL_FLAGS_BASIC),
  23};
  24
  25const struct nla_policy ethnl_header_policy_stats[] = {
  26	[ETHTOOL_A_HEADER_DEV_INDEX]	= { .type = NLA_U32 },
  27	[ETHTOOL_A_HEADER_DEV_NAME]	= { .type = NLA_NUL_STRING,
  28					    .len = ALTIFNAMSIZ - 1 },
  29	[ETHTOOL_A_HEADER_FLAGS]	= NLA_POLICY_MASK(NLA_U32,
  30							  ETHTOOL_FLAGS_STATS),
  31};
  32
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
  33int ethnl_ops_begin(struct net_device *dev)
  34{
  35	int ret;
  36
  37	if (!dev)
  38		return -ENODEV;
  39
  40	if (dev->dev.parent)
  41		pm_runtime_get_sync(dev->dev.parent);
  42
  43	if (!netif_device_present(dev) ||
  44	    dev->reg_state == NETREG_UNREGISTERING) {
  45		ret = -ENODEV;
  46		goto err;
  47	}
  48
  49	if (dev->ethtool_ops->begin) {
  50		ret = dev->ethtool_ops->begin(dev);
  51		if (ret)
  52			goto err;
  53	}
  54
  55	return 0;
  56err:
  57	if (dev->dev.parent)
  58		pm_runtime_put(dev->dev.parent);
  59
  60	return ret;
  61}
  62
  63void ethnl_ops_complete(struct net_device *dev)
  64{
  65	if (dev->ethtool_ops->complete)
  66		dev->ethtool_ops->complete(dev);
  67
  68	if (dev->dev.parent)
  69		pm_runtime_put(dev->dev.parent);
  70}
  71
  72/**
  73 * ethnl_parse_header_dev_get() - parse request header
  74 * @req_info:    structure to put results into
  75 * @header:      nest attribute with request header
  76 * @net:         request netns
  77 * @extack:      netlink extack for error reporting
  78 * @require_dev: fail if no device identified in header
  79 *
  80 * Parse request header in nested attribute @nest and puts results into
  81 * the structure pointed to by @req_info. Extack from @info is used for error
  82 * reporting. If req_info->dev is not null on return, reference to it has
  83 * been taken. If error is returned, *req_info is null initialized and no
  84 * reference is held.
  85 *
  86 * Return: 0 on success or negative error code
  87 */
  88int ethnl_parse_header_dev_get(struct ethnl_req_info *req_info,
  89			       const struct nlattr *header, struct net *net,
  90			       struct netlink_ext_ack *extack, bool require_dev)
  91{
  92	struct nlattr *tb[ARRAY_SIZE(ethnl_header_policy)];
  93	const struct nlattr *devname_attr;
  94	struct net_device *dev = NULL;
  95	u32 flags = 0;
  96	int ret;
  97
  98	if (!header) {
 
 
  99		NL_SET_ERR_MSG(extack, "request header missing");
 100		return -EINVAL;
 101	}
 102	/* No validation here, command policy should have a nested policy set
 103	 * for the header, therefore validation should have already been done.
 104	 */
 105	ret = nla_parse_nested(tb, ARRAY_SIZE(ethnl_header_policy) - 1, header,
 106			       NULL, extack);
 107	if (ret < 0)
 108		return ret;
 109	if (tb[ETHTOOL_A_HEADER_FLAGS])
 110		flags = nla_get_u32(tb[ETHTOOL_A_HEADER_FLAGS]);
 111
 112	devname_attr = tb[ETHTOOL_A_HEADER_DEV_NAME];
 113	if (tb[ETHTOOL_A_HEADER_DEV_INDEX]) {
 114		u32 ifindex = nla_get_u32(tb[ETHTOOL_A_HEADER_DEV_INDEX]);
 115
 116		dev = dev_get_by_index(net, ifindex);
 
 117		if (!dev) {
 118			NL_SET_ERR_MSG_ATTR(extack,
 119					    tb[ETHTOOL_A_HEADER_DEV_INDEX],
 120					    "no device matches ifindex");
 121			return -ENODEV;
 122		}
 123		/* if both ifindex and ifname are passed, they must match */
 124		if (devname_attr &&
 125		    strncmp(dev->name, nla_data(devname_attr), IFNAMSIZ)) {
 126			dev_put(dev);
 127			NL_SET_ERR_MSG_ATTR(extack, header,
 128					    "ifindex and name do not match");
 129			return -ENODEV;
 130		}
 131	} else if (devname_attr) {
 132		dev = dev_get_by_name(net, nla_data(devname_attr));
 
 133		if (!dev) {
 134			NL_SET_ERR_MSG_ATTR(extack, devname_attr,
 135					    "no device matches name");
 136			return -ENODEV;
 137		}
 138	} else if (require_dev) {
 139		NL_SET_ERR_MSG_ATTR(extack, header,
 140				    "neither ifindex nor name specified");
 141		return -EINVAL;
 142	}
 143
 
 
 
 
 
 
 
 
 
 
 144	req_info->dev = dev;
 145	if (dev)
 146		netdev_tracker_alloc(dev, &req_info->dev_tracker, GFP_KERNEL);
 147	req_info->flags = flags;
 148	return 0;
 149}
 150
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 151/**
 152 * ethnl_fill_reply_header() - Put common header into a reply message
 153 * @skb:      skb with the message
 154 * @dev:      network device to describe in header
 155 * @attrtype: attribute type to use for the nest
 156 *
 157 * Create a nested attribute with attributes describing given network device.
 158 *
 159 * Return: 0 on success, error value (-EMSGSIZE only) on error
 160 */
 161int ethnl_fill_reply_header(struct sk_buff *skb, struct net_device *dev,
 162			    u16 attrtype)
 163{
 164	struct nlattr *nest;
 165
 166	if (!dev)
 167		return 0;
 168	nest = nla_nest_start(skb, attrtype);
 169	if (!nest)
 170		return -EMSGSIZE;
 171
 172	if (nla_put_u32(skb, ETHTOOL_A_HEADER_DEV_INDEX, (u32)dev->ifindex) ||
 173	    nla_put_string(skb, ETHTOOL_A_HEADER_DEV_NAME, dev->name))
 174		goto nla_put_failure;
 175	/* If more attributes are put into reply header, ethnl_header_size()
 176	 * must be updated to account for them.
 177	 */
 178
 179	nla_nest_end(skb, nest);
 180	return 0;
 181
 182nla_put_failure:
 183	nla_nest_cancel(skb, nest);
 184	return -EMSGSIZE;
 185}
 186
 187/**
 188 * ethnl_reply_init() - Create skb for a reply and fill device identification
 189 * @payload:      payload length (without netlink and genetlink header)
 190 * @dev:          device the reply is about (may be null)
 191 * @cmd:          ETHTOOL_MSG_* message type for reply
 192 * @hdr_attrtype: attribute type for common header
 193 * @info:         genetlink info of the received packet we respond to
 194 * @ehdrp:        place to store payload pointer returned by genlmsg_new()
 195 *
 196 * Return: pointer to allocated skb on success, NULL on error
 197 */
 198struct sk_buff *ethnl_reply_init(size_t payload, struct net_device *dev, u8 cmd,
 199				 u16 hdr_attrtype, struct genl_info *info,
 200				 void **ehdrp)
 201{
 202	struct sk_buff *skb;
 203
 204	skb = genlmsg_new(payload, GFP_KERNEL);
 205	if (!skb)
 206		goto err;
 207	*ehdrp = genlmsg_put_reply(skb, info, &ethtool_genl_family, 0, cmd);
 208	if (!*ehdrp)
 209		goto err_free;
 210
 211	if (dev) {
 212		int ret;
 213
 214		ret = ethnl_fill_reply_header(skb, dev, hdr_attrtype);
 215		if (ret < 0)
 216			goto err_free;
 217	}
 218	return skb;
 219
 220err_free:
 221	nlmsg_free(skb);
 222err:
 223	if (info)
 224		GENL_SET_ERR_MSG(info, "failed to setup reply message");
 225	return NULL;
 226}
 227
 228void *ethnl_dump_put(struct sk_buff *skb, struct netlink_callback *cb, u8 cmd)
 229{
 230	return genlmsg_put(skb, NETLINK_CB(cb->skb).portid, cb->nlh->nlmsg_seq,
 231			   &ethtool_genl_family, 0, cmd);
 232}
 233
 234void *ethnl_bcastmsg_put(struct sk_buff *skb, u8 cmd)
 235{
 236	return genlmsg_put(skb, 0, ++ethnl_bcast_seq, &ethtool_genl_family, 0,
 237			   cmd);
 238}
 239
 
 
 
 
 
 240int ethnl_multicast(struct sk_buff *skb, struct net_device *dev)
 241{
 242	return genlmsg_multicast_netns(&ethtool_genl_family, dev_net(dev), skb,
 243				       0, ETHNL_MCGRP_MONITOR, GFP_KERNEL);
 244}
 245
 246/* GET request helpers */
 247
 248/**
 249 * struct ethnl_dump_ctx - context structure for generic dumpit() callback
 250 * @ops:        request ops of currently processed message type
 251 * @req_info:   parsed request header of processed request
 252 * @reply_data: data needed to compose the reply
 253 * @pos_hash:   saved iteration position - hashbucket
 254 * @pos_idx:    saved iteration position - index
 255 *
 256 * These parameters are kept in struct netlink_callback as context preserved
 257 * between iterations. They are initialized by ethnl_default_start() and used
 258 * in ethnl_default_dumpit() and ethnl_default_done().
 259 */
 260struct ethnl_dump_ctx {
 261	const struct ethnl_request_ops	*ops;
 262	struct ethnl_req_info		*req_info;
 263	struct ethnl_reply_data		*reply_data;
 264	int				pos_hash;
 265	int				pos_idx;
 266};
 267
 268static const struct ethnl_request_ops *
 269ethnl_default_requests[__ETHTOOL_MSG_USER_CNT] = {
 270	[ETHTOOL_MSG_STRSET_GET]	= &ethnl_strset_request_ops,
 271	[ETHTOOL_MSG_LINKINFO_GET]	= &ethnl_linkinfo_request_ops,
 
 272	[ETHTOOL_MSG_LINKMODES_GET]	= &ethnl_linkmodes_request_ops,
 
 273	[ETHTOOL_MSG_LINKSTATE_GET]	= &ethnl_linkstate_request_ops,
 274	[ETHTOOL_MSG_DEBUG_GET]		= &ethnl_debug_request_ops,
 
 275	[ETHTOOL_MSG_WOL_GET]		= &ethnl_wol_request_ops,
 
 276	[ETHTOOL_MSG_FEATURES_GET]	= &ethnl_features_request_ops,
 277	[ETHTOOL_MSG_PRIVFLAGS_GET]	= &ethnl_privflags_request_ops,
 
 278	[ETHTOOL_MSG_RINGS_GET]		= &ethnl_rings_request_ops,
 
 279	[ETHTOOL_MSG_CHANNELS_GET]	= &ethnl_channels_request_ops,
 
 280	[ETHTOOL_MSG_COALESCE_GET]	= &ethnl_coalesce_request_ops,
 
 281	[ETHTOOL_MSG_PAUSE_GET]		= &ethnl_pause_request_ops,
 
 282	[ETHTOOL_MSG_EEE_GET]		= &ethnl_eee_request_ops,
 
 283	[ETHTOOL_MSG_FEC_GET]		= &ethnl_fec_request_ops,
 
 284	[ETHTOOL_MSG_TSINFO_GET]	= &ethnl_tsinfo_request_ops,
 285	[ETHTOOL_MSG_MODULE_EEPROM_GET]	= &ethnl_module_eeprom_request_ops,
 286	[ETHTOOL_MSG_STATS_GET]		= &ethnl_stats_request_ops,
 287	[ETHTOOL_MSG_PHC_VCLOCKS_GET]	= &ethnl_phc_vclocks_request_ops,
 288	[ETHTOOL_MSG_MODULE_GET]	= &ethnl_module_request_ops,
 
 289	[ETHTOOL_MSG_PSE_GET]		= &ethnl_pse_request_ops,
 
 290	[ETHTOOL_MSG_RSS_GET]		= &ethnl_rss_request_ops,
 
 
 
 
 
 291};
 292
 293static struct ethnl_dump_ctx *ethnl_dump_context(struct netlink_callback *cb)
 294{
 295	return (struct ethnl_dump_ctx *)cb->ctx;
 296}
 297
 298/**
 299 * ethnl_default_parse() - Parse request message
 300 * @req_info:    pointer to structure to put data into
 301 * @tb:		 parsed attributes
 302 * @net:         request netns
 303 * @request_ops: struct request_ops for request type
 304 * @extack:      netlink extack for error reporting
 305 * @require_dev: fail if no device identified in header
 306 *
 307 * Parse universal request header and call request specific ->parse_request()
 308 * callback (if defined) to parse the rest of the message.
 309 *
 310 * Return: 0 on success or negative error code
 311 */
 312static int ethnl_default_parse(struct ethnl_req_info *req_info,
 313			       struct nlattr **tb, struct net *net,
 314			       const struct ethnl_request_ops *request_ops,
 315			       struct netlink_ext_ack *extack, bool require_dev)
 316{
 
 317	int ret;
 318
 319	ret = ethnl_parse_header_dev_get(req_info, tb[request_ops->hdr_attr],
 320					 net, extack, require_dev);
 
 321	if (ret < 0)
 322		return ret;
 323
 324	if (request_ops->parse_request) {
 325		ret = request_ops->parse_request(req_info, tb, extack);
 326		if (ret < 0)
 327			return ret;
 328	}
 329
 330	return 0;
 331}
 332
 333/**
 334 * ethnl_init_reply_data() - Initialize reply data for GET request
 335 * @reply_data: pointer to embedded struct ethnl_reply_data
 336 * @ops:        instance of struct ethnl_request_ops describing the layout
 337 * @dev:        network device to initialize the reply for
 338 *
 339 * Fills the reply data part with zeros and sets the dev member. Must be called
 340 * before calling the ->fill_reply() callback (for each iteration when handling
 341 * dump requests).
 342 */
 343static void ethnl_init_reply_data(struct ethnl_reply_data *reply_data,
 344				  const struct ethnl_request_ops *ops,
 345				  struct net_device *dev)
 346{
 347	memset(reply_data, 0, ops->reply_data_size);
 348	reply_data->dev = dev;
 349}
 350
 351/* default ->doit() handler for GET type requests */
 352static int ethnl_default_doit(struct sk_buff *skb, struct genl_info *info)
 353{
 354	struct ethnl_reply_data *reply_data = NULL;
 355	struct ethnl_req_info *req_info = NULL;
 356	const u8 cmd = info->genlhdr->cmd;
 357	const struct ethnl_request_ops *ops;
 358	int hdr_len, reply_len;
 359	struct sk_buff *rskb;
 360	void *reply_payload;
 361	int ret;
 362
 363	ops = ethnl_default_requests[cmd];
 364	if (WARN_ONCE(!ops, "cmd %u has no ethnl_request_ops\n", cmd))
 365		return -EOPNOTSUPP;
 366	if (GENL_REQ_ATTR_CHECK(info, ops->hdr_attr))
 367		return -EINVAL;
 368
 369	req_info = kzalloc(ops->req_info_size, GFP_KERNEL);
 370	if (!req_info)
 371		return -ENOMEM;
 372	reply_data = kmalloc(ops->reply_data_size, GFP_KERNEL);
 373	if (!reply_data) {
 374		kfree(req_info);
 375		return -ENOMEM;
 376	}
 377
 378	ret = ethnl_default_parse(req_info, info->attrs, genl_info_net(info),
 379				  ops, info->extack, !ops->allow_nodev_do);
 380	if (ret < 0)
 381		goto err_dev;
 382	ethnl_init_reply_data(reply_data, ops, req_info->dev);
 383
 384	rtnl_lock();
 385	ret = ops->prepare_data(req_info, reply_data, info);
 386	rtnl_unlock();
 387	if (ret < 0)
 388		goto err_cleanup;
 389	ret = ops->reply_size(req_info, reply_data);
 390	if (ret < 0)
 391		goto err_cleanup;
 392	reply_len = ret;
 393	ret = -ENOMEM;
 394	rskb = ethnl_reply_init(reply_len + ethnl_reply_header_size(),
 395				req_info->dev, ops->reply_cmd,
 396				ops->hdr_attr, info, &reply_payload);
 397	if (!rskb)
 398		goto err_cleanup;
 399	hdr_len = rskb->len;
 400	ret = ops->fill_reply(rskb, req_info, reply_data);
 401	if (ret < 0)
 402		goto err_msg;
 403	WARN_ONCE(rskb->len - hdr_len > reply_len,
 404		  "ethnl cmd %d: calculated reply length %d, but consumed %d\n",
 405		  cmd, reply_len, rskb->len - hdr_len);
 406	if (ops->cleanup_data)
 407		ops->cleanup_data(reply_data);
 408
 409	genlmsg_end(rskb, reply_payload);
 410	netdev_put(req_info->dev, &req_info->dev_tracker);
 411	kfree(reply_data);
 412	kfree(req_info);
 413	return genlmsg_reply(rskb, info);
 414
 415err_msg:
 416	WARN_ONCE(ret == -EMSGSIZE, "calculated message payload length (%d) not sufficient\n", reply_len);
 417	nlmsg_free(rskb);
 418err_cleanup:
 419	if (ops->cleanup_data)
 420		ops->cleanup_data(reply_data);
 421err_dev:
 422	netdev_put(req_info->dev, &req_info->dev_tracker);
 423	kfree(reply_data);
 424	kfree(req_info);
 425	return ret;
 426}
 427
 428static int ethnl_default_dump_one(struct sk_buff *skb, struct net_device *dev,
 429				  const struct ethnl_dump_ctx *ctx,
 430				  struct netlink_callback *cb)
 431{
 432	void *ehdr;
 433	int ret;
 434
 435	ehdr = genlmsg_put(skb, NETLINK_CB(cb->skb).portid, cb->nlh->nlmsg_seq,
 436			   &ethtool_genl_family, NLM_F_MULTI,
 437			   ctx->ops->reply_cmd);
 438	if (!ehdr)
 439		return -EMSGSIZE;
 440
 441	ethnl_init_reply_data(ctx->reply_data, ctx->ops, dev);
 442	rtnl_lock();
 443	ret = ctx->ops->prepare_data(ctx->req_info, ctx->reply_data, NULL);
 444	rtnl_unlock();
 445	if (ret < 0)
 446		goto out;
 447	ret = ethnl_fill_reply_header(skb, dev, ctx->ops->hdr_attr);
 448	if (ret < 0)
 449		goto out;
 450	ret = ctx->ops->fill_reply(skb, ctx->req_info, ctx->reply_data);
 451
 452out:
 453	if (ctx->ops->cleanup_data)
 454		ctx->ops->cleanup_data(ctx->reply_data);
 455	ctx->reply_data->dev = NULL;
 456	if (ret < 0)
 457		genlmsg_cancel(skb, ehdr);
 458	else
 459		genlmsg_end(skb, ehdr);
 460	return ret;
 461}
 462
 463/* Default ->dumpit() handler for GET requests. Device iteration copied from
 464 * rtnl_dump_ifinfo(); we have to be more careful about device hashtable
 465 * persistence as we cannot guarantee to hold RTNL lock through the whole
 466 * function as rtnetnlink does.
 467 */
 468static int ethnl_default_dumpit(struct sk_buff *skb,
 469				struct netlink_callback *cb)
 470{
 471	struct ethnl_dump_ctx *ctx = ethnl_dump_context(cb);
 472	struct net *net = sock_net(skb->sk);
 473	int s_idx = ctx->pos_idx;
 474	int h, idx = 0;
 475	int ret = 0;
 476
 477	rtnl_lock();
 478	for (h = ctx->pos_hash; h < NETDEV_HASHENTRIES; h++, s_idx = 0) {
 479		struct hlist_head *head;
 480		struct net_device *dev;
 481		unsigned int seq;
 482
 483		head = &net->dev_index_head[h];
 484
 485restart_chain:
 486		seq = net->dev_base_seq;
 487		cb->seq = seq;
 488		idx = 0;
 489		hlist_for_each_entry(dev, head, index_hlist) {
 490			if (idx < s_idx)
 491				goto cont;
 492			dev_hold(dev);
 493			rtnl_unlock();
 494
 495			ret = ethnl_default_dump_one(skb, dev, ctx, cb);
 496			dev_put(dev);
 497			if (ret < 0) {
 498				if (ret == -EOPNOTSUPP)
 499					goto lock_and_cont;
 500				if (likely(skb->len))
 501					ret = skb->len;
 502				goto out;
 503			}
 504lock_and_cont:
 505			rtnl_lock();
 506			if (net->dev_base_seq != seq) {
 507				s_idx = idx + 1;
 508				goto restart_chain;
 509			}
 510cont:
 511			idx++;
 512		}
 513
 514	}
 515	rtnl_unlock();
 516
 517out:
 518	ctx->pos_hash = h;
 519	ctx->pos_idx = idx;
 520	nl_dump_check_consistent(cb, nlmsg_hdr(skb));
 521
 522	return ret;
 523}
 524
 525/* generic ->start() handler for GET requests */
 526static int ethnl_default_start(struct netlink_callback *cb)
 527{
 528	const struct genl_dumpit_info *info = genl_dumpit_info(cb);
 529	struct ethnl_dump_ctx *ctx = ethnl_dump_context(cb);
 530	struct ethnl_reply_data *reply_data;
 531	const struct ethnl_request_ops *ops;
 532	struct ethnl_req_info *req_info;
 533	struct genlmsghdr *ghdr;
 534	int ret;
 535
 536	BUILD_BUG_ON(sizeof(*ctx) > sizeof(cb->ctx));
 537
 538	ghdr = nlmsg_data(cb->nlh);
 539	ops = ethnl_default_requests[ghdr->cmd];
 540	if (WARN_ONCE(!ops, "cmd %u has no ethnl_request_ops\n", ghdr->cmd))
 541		return -EOPNOTSUPP;
 542	req_info = kzalloc(ops->req_info_size, GFP_KERNEL);
 543	if (!req_info)
 544		return -ENOMEM;
 545	reply_data = kmalloc(ops->reply_data_size, GFP_KERNEL);
 546	if (!reply_data) {
 547		ret = -ENOMEM;
 548		goto free_req_info;
 549	}
 550
 551	ret = ethnl_default_parse(req_info, info->attrs, sock_net(cb->skb->sk),
 552				  ops, cb->extack, false);
 553	if (req_info->dev) {
 554		/* We ignore device specification in dump requests but as the
 555		 * same parser as for non-dump (doit) requests is used, it
 556		 * would take reference to the device if it finds one
 557		 */
 558		netdev_put(req_info->dev, &req_info->dev_tracker);
 559		req_info->dev = NULL;
 560	}
 561	if (ret < 0)
 562		goto free_reply_data;
 563
 564	ctx->ops = ops;
 565	ctx->req_info = req_info;
 566	ctx->reply_data = reply_data;
 567	ctx->pos_hash = 0;
 568	ctx->pos_idx = 0;
 569
 570	return 0;
 571
 572free_reply_data:
 573	kfree(reply_data);
 574free_req_info:
 575	kfree(req_info);
 576
 577	return ret;
 578}
 579
 580/* default ->done() handler for GET requests */
 581static int ethnl_default_done(struct netlink_callback *cb)
 582{
 583	struct ethnl_dump_ctx *ctx = ethnl_dump_context(cb);
 584
 585	kfree(ctx->reply_data);
 586	kfree(ctx->req_info);
 587
 588	return 0;
 589}
 590
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 591static const struct ethnl_request_ops *
 592ethnl_default_notify_ops[ETHTOOL_MSG_KERNEL_MAX + 1] = {
 593	[ETHTOOL_MSG_LINKINFO_NTF]	= &ethnl_linkinfo_request_ops,
 594	[ETHTOOL_MSG_LINKMODES_NTF]	= &ethnl_linkmodes_request_ops,
 595	[ETHTOOL_MSG_DEBUG_NTF]		= &ethnl_debug_request_ops,
 596	[ETHTOOL_MSG_WOL_NTF]		= &ethnl_wol_request_ops,
 597	[ETHTOOL_MSG_FEATURES_NTF]	= &ethnl_features_request_ops,
 598	[ETHTOOL_MSG_PRIVFLAGS_NTF]	= &ethnl_privflags_request_ops,
 599	[ETHTOOL_MSG_RINGS_NTF]		= &ethnl_rings_request_ops,
 600	[ETHTOOL_MSG_CHANNELS_NTF]	= &ethnl_channels_request_ops,
 601	[ETHTOOL_MSG_COALESCE_NTF]	= &ethnl_coalesce_request_ops,
 602	[ETHTOOL_MSG_PAUSE_NTF]		= &ethnl_pause_request_ops,
 603	[ETHTOOL_MSG_EEE_NTF]		= &ethnl_eee_request_ops,
 604	[ETHTOOL_MSG_FEC_NTF]		= &ethnl_fec_request_ops,
 605	[ETHTOOL_MSG_MODULE_NTF]	= &ethnl_module_request_ops,
 
 
 606};
 607
 608/* default notification handler */
 609static void ethnl_default_notify(struct net_device *dev, unsigned int cmd,
 610				 const void *data)
 611{
 612	struct ethnl_reply_data *reply_data;
 613	const struct ethnl_request_ops *ops;
 614	struct ethnl_req_info *req_info;
 
 615	struct sk_buff *skb;
 616	void *reply_payload;
 617	int reply_len;
 618	int ret;
 619
 
 
 620	if (WARN_ONCE(cmd > ETHTOOL_MSG_KERNEL_MAX ||
 621		      !ethnl_default_notify_ops[cmd],
 622		      "unexpected notification type %u\n", cmd))
 623		return;
 624	ops = ethnl_default_notify_ops[cmd];
 625	req_info = kzalloc(ops->req_info_size, GFP_KERNEL);
 626	if (!req_info)
 627		return;
 628	reply_data = kmalloc(ops->reply_data_size, GFP_KERNEL);
 629	if (!reply_data) {
 630		kfree(req_info);
 631		return;
 632	}
 633
 634	req_info->dev = dev;
 635	req_info->flags |= ETHTOOL_FLAG_COMPACT_BITSETS;
 636
 637	ethnl_init_reply_data(reply_data, ops, dev);
 638	ret = ops->prepare_data(req_info, reply_data, NULL);
 639	if (ret < 0)
 640		goto err_cleanup;
 641	ret = ops->reply_size(req_info, reply_data);
 642	if (ret < 0)
 643		goto err_cleanup;
 644	reply_len = ret + ethnl_reply_header_size();
 645	skb = genlmsg_new(reply_len, GFP_KERNEL);
 646	if (!skb)
 647		goto err_cleanup;
 648	reply_payload = ethnl_bcastmsg_put(skb, cmd);
 649	if (!reply_payload)
 650		goto err_skb;
 651	ret = ethnl_fill_reply_header(skb, dev, ops->hdr_attr);
 652	if (ret < 0)
 653		goto err_msg;
 654	ret = ops->fill_reply(skb, req_info, reply_data);
 655	if (ret < 0)
 656		goto err_msg;
 657	if (ops->cleanup_data)
 658		ops->cleanup_data(reply_data);
 659
 660	genlmsg_end(skb, reply_payload);
 661	kfree(reply_data);
 662	kfree(req_info);
 663	ethnl_multicast(skb, dev);
 664	return;
 665
 666err_msg:
 667	WARN_ONCE(ret == -EMSGSIZE,
 668		  "calculated message payload length (%d) not sufficient\n",
 669		  reply_len);
 670err_skb:
 671	nlmsg_free(skb);
 672err_cleanup:
 673	if (ops->cleanup_data)
 674		ops->cleanup_data(reply_data);
 675	kfree(reply_data);
 676	kfree(req_info);
 677	return;
 678}
 679
 680/* notifications */
 681
 682typedef void (*ethnl_notify_handler_t)(struct net_device *dev, unsigned int cmd,
 683				       const void *data);
 684
 685static const ethnl_notify_handler_t ethnl_notify_handlers[] = {
 686	[ETHTOOL_MSG_LINKINFO_NTF]	= ethnl_default_notify,
 687	[ETHTOOL_MSG_LINKMODES_NTF]	= ethnl_default_notify,
 688	[ETHTOOL_MSG_DEBUG_NTF]		= ethnl_default_notify,
 689	[ETHTOOL_MSG_WOL_NTF]		= ethnl_default_notify,
 690	[ETHTOOL_MSG_FEATURES_NTF]	= ethnl_default_notify,
 691	[ETHTOOL_MSG_PRIVFLAGS_NTF]	= ethnl_default_notify,
 692	[ETHTOOL_MSG_RINGS_NTF]		= ethnl_default_notify,
 693	[ETHTOOL_MSG_CHANNELS_NTF]	= ethnl_default_notify,
 694	[ETHTOOL_MSG_COALESCE_NTF]	= ethnl_default_notify,
 695	[ETHTOOL_MSG_PAUSE_NTF]		= ethnl_default_notify,
 696	[ETHTOOL_MSG_EEE_NTF]		= ethnl_default_notify,
 697	[ETHTOOL_MSG_FEC_NTF]		= ethnl_default_notify,
 698	[ETHTOOL_MSG_MODULE_NTF]	= ethnl_default_notify,
 
 
 699};
 700
 701void ethtool_notify(struct net_device *dev, unsigned int cmd, const void *data)
 702{
 703	if (unlikely(!ethnl_ok))
 704		return;
 705	ASSERT_RTNL();
 706
 707	if (likely(cmd < ARRAY_SIZE(ethnl_notify_handlers) &&
 708		   ethnl_notify_handlers[cmd]))
 709		ethnl_notify_handlers[cmd](dev, cmd, data);
 710	else
 711		WARN_ONCE(1, "notification %u not implemented (dev=%s)\n",
 712			  cmd, netdev_name(dev));
 713}
 714EXPORT_SYMBOL(ethtool_notify);
 715
 716static void ethnl_notify_features(struct netdev_notifier_info *info)
 717{
 718	struct net_device *dev = netdev_notifier_info_to_dev(info);
 719
 720	ethtool_notify(dev, ETHTOOL_MSG_FEATURES_NTF, NULL);
 721}
 722
 723static int ethnl_netdev_event(struct notifier_block *this, unsigned long event,
 724			      void *ptr)
 725{
 
 
 
 
 
 
 
 726	switch (event) {
 727	case NETDEV_FEAT_CHANGE:
 728		ethnl_notify_features(ptr);
 729		break;
 
 
 
 
 
 730	}
 731
 732	return NOTIFY_DONE;
 733}
 734
 735static struct notifier_block ethnl_netdev_notifier = {
 736	.notifier_call = ethnl_netdev_event,
 737};
 738
 739/* genetlink setup */
 740
 741static const struct genl_ops ethtool_genl_ops[] = {
 742	{
 743		.cmd	= ETHTOOL_MSG_STRSET_GET,
 744		.doit	= ethnl_default_doit,
 745		.start	= ethnl_default_start,
 746		.dumpit	= ethnl_default_dumpit,
 747		.done	= ethnl_default_done,
 748		.policy = ethnl_strset_get_policy,
 749		.maxattr = ARRAY_SIZE(ethnl_strset_get_policy) - 1,
 750	},
 751	{
 752		.cmd	= ETHTOOL_MSG_LINKINFO_GET,
 753		.doit	= ethnl_default_doit,
 754		.start	= ethnl_default_start,
 755		.dumpit	= ethnl_default_dumpit,
 756		.done	= ethnl_default_done,
 757		.policy = ethnl_linkinfo_get_policy,
 758		.maxattr = ARRAY_SIZE(ethnl_linkinfo_get_policy) - 1,
 759	},
 760	{
 761		.cmd	= ETHTOOL_MSG_LINKINFO_SET,
 762		.flags	= GENL_UNS_ADMIN_PERM,
 763		.doit	= ethnl_set_linkinfo,
 764		.policy = ethnl_linkinfo_set_policy,
 765		.maxattr = ARRAY_SIZE(ethnl_linkinfo_set_policy) - 1,
 766	},
 767	{
 768		.cmd	= ETHTOOL_MSG_LINKMODES_GET,
 769		.doit	= ethnl_default_doit,
 770		.start	= ethnl_default_start,
 771		.dumpit	= ethnl_default_dumpit,
 772		.done	= ethnl_default_done,
 773		.policy = ethnl_linkmodes_get_policy,
 774		.maxattr = ARRAY_SIZE(ethnl_linkmodes_get_policy) - 1,
 775	},
 776	{
 777		.cmd	= ETHTOOL_MSG_LINKMODES_SET,
 778		.flags	= GENL_UNS_ADMIN_PERM,
 779		.doit	= ethnl_set_linkmodes,
 780		.policy = ethnl_linkmodes_set_policy,
 781		.maxattr = ARRAY_SIZE(ethnl_linkmodes_set_policy) - 1,
 782	},
 783	{
 784		.cmd	= ETHTOOL_MSG_LINKSTATE_GET,
 785		.doit	= ethnl_default_doit,
 786		.start	= ethnl_default_start,
 787		.dumpit	= ethnl_default_dumpit,
 788		.done	= ethnl_default_done,
 789		.policy = ethnl_linkstate_get_policy,
 790		.maxattr = ARRAY_SIZE(ethnl_linkstate_get_policy) - 1,
 791	},
 792	{
 793		.cmd	= ETHTOOL_MSG_DEBUG_GET,
 794		.doit	= ethnl_default_doit,
 795		.start	= ethnl_default_start,
 796		.dumpit	= ethnl_default_dumpit,
 797		.done	= ethnl_default_done,
 798		.policy = ethnl_debug_get_policy,
 799		.maxattr = ARRAY_SIZE(ethnl_debug_get_policy) - 1,
 800	},
 801	{
 802		.cmd	= ETHTOOL_MSG_DEBUG_SET,
 803		.flags	= GENL_UNS_ADMIN_PERM,
 804		.doit	= ethnl_set_debug,
 805		.policy = ethnl_debug_set_policy,
 806		.maxattr = ARRAY_SIZE(ethnl_debug_set_policy) - 1,
 807	},
 808	{
 809		.cmd	= ETHTOOL_MSG_WOL_GET,
 810		.flags	= GENL_UNS_ADMIN_PERM,
 811		.doit	= ethnl_default_doit,
 812		.start	= ethnl_default_start,
 813		.dumpit	= ethnl_default_dumpit,
 814		.done	= ethnl_default_done,
 815		.policy = ethnl_wol_get_policy,
 816		.maxattr = ARRAY_SIZE(ethnl_wol_get_policy) - 1,
 817	},
 818	{
 819		.cmd	= ETHTOOL_MSG_WOL_SET,
 820		.flags	= GENL_UNS_ADMIN_PERM,
 821		.doit	= ethnl_set_wol,
 822		.policy = ethnl_wol_set_policy,
 823		.maxattr = ARRAY_SIZE(ethnl_wol_set_policy) - 1,
 824	},
 825	{
 826		.cmd	= ETHTOOL_MSG_FEATURES_GET,
 827		.doit	= ethnl_default_doit,
 828		.start	= ethnl_default_start,
 829		.dumpit	= ethnl_default_dumpit,
 830		.done	= ethnl_default_done,
 831		.policy = ethnl_features_get_policy,
 832		.maxattr = ARRAY_SIZE(ethnl_features_get_policy) - 1,
 833	},
 834	{
 835		.cmd	= ETHTOOL_MSG_FEATURES_SET,
 836		.flags	= GENL_UNS_ADMIN_PERM,
 837		.doit	= ethnl_set_features,
 838		.policy = ethnl_features_set_policy,
 839		.maxattr = ARRAY_SIZE(ethnl_features_set_policy) - 1,
 840	},
 841	{
 842		.cmd	= ETHTOOL_MSG_PRIVFLAGS_GET,
 843		.doit	= ethnl_default_doit,
 844		.start	= ethnl_default_start,
 845		.dumpit	= ethnl_default_dumpit,
 846		.done	= ethnl_default_done,
 847		.policy = ethnl_privflags_get_policy,
 848		.maxattr = ARRAY_SIZE(ethnl_privflags_get_policy) - 1,
 849	},
 850	{
 851		.cmd	= ETHTOOL_MSG_PRIVFLAGS_SET,
 852		.flags	= GENL_UNS_ADMIN_PERM,
 853		.doit	= ethnl_set_privflags,
 854		.policy = ethnl_privflags_set_policy,
 855		.maxattr = ARRAY_SIZE(ethnl_privflags_set_policy) - 1,
 856	},
 857	{
 858		.cmd	= ETHTOOL_MSG_RINGS_GET,
 859		.doit	= ethnl_default_doit,
 860		.start	= ethnl_default_start,
 861		.dumpit	= ethnl_default_dumpit,
 862		.done	= ethnl_default_done,
 863		.policy = ethnl_rings_get_policy,
 864		.maxattr = ARRAY_SIZE(ethnl_rings_get_policy) - 1,
 865	},
 866	{
 867		.cmd	= ETHTOOL_MSG_RINGS_SET,
 868		.flags	= GENL_UNS_ADMIN_PERM,
 869		.doit	= ethnl_set_rings,
 870		.policy = ethnl_rings_set_policy,
 871		.maxattr = ARRAY_SIZE(ethnl_rings_set_policy) - 1,
 872	},
 873	{
 874		.cmd	= ETHTOOL_MSG_CHANNELS_GET,
 875		.doit	= ethnl_default_doit,
 876		.start	= ethnl_default_start,
 877		.dumpit	= ethnl_default_dumpit,
 878		.done	= ethnl_default_done,
 879		.policy = ethnl_channels_get_policy,
 880		.maxattr = ARRAY_SIZE(ethnl_channels_get_policy) - 1,
 881	},
 882	{
 883		.cmd	= ETHTOOL_MSG_CHANNELS_SET,
 884		.flags	= GENL_UNS_ADMIN_PERM,
 885		.doit	= ethnl_set_channels,
 886		.policy = ethnl_channels_set_policy,
 887		.maxattr = ARRAY_SIZE(ethnl_channels_set_policy) - 1,
 888	},
 889	{
 890		.cmd	= ETHTOOL_MSG_COALESCE_GET,
 891		.doit	= ethnl_default_doit,
 892		.start	= ethnl_default_start,
 893		.dumpit	= ethnl_default_dumpit,
 894		.done	= ethnl_default_done,
 895		.policy = ethnl_coalesce_get_policy,
 896		.maxattr = ARRAY_SIZE(ethnl_coalesce_get_policy) - 1,
 897	},
 898	{
 899		.cmd	= ETHTOOL_MSG_COALESCE_SET,
 900		.flags	= GENL_UNS_ADMIN_PERM,
 901		.doit	= ethnl_set_coalesce,
 902		.policy = ethnl_coalesce_set_policy,
 903		.maxattr = ARRAY_SIZE(ethnl_coalesce_set_policy) - 1,
 904	},
 905	{
 906		.cmd	= ETHTOOL_MSG_PAUSE_GET,
 907		.doit	= ethnl_default_doit,
 908		.start	= ethnl_default_start,
 909		.dumpit	= ethnl_default_dumpit,
 910		.done	= ethnl_default_done,
 911		.policy = ethnl_pause_get_policy,
 912		.maxattr = ARRAY_SIZE(ethnl_pause_get_policy) - 1,
 913	},
 914	{
 915		.cmd	= ETHTOOL_MSG_PAUSE_SET,
 916		.flags	= GENL_UNS_ADMIN_PERM,
 917		.doit	= ethnl_set_pause,
 918		.policy = ethnl_pause_set_policy,
 919		.maxattr = ARRAY_SIZE(ethnl_pause_set_policy) - 1,
 920	},
 921	{
 922		.cmd	= ETHTOOL_MSG_EEE_GET,
 923		.doit	= ethnl_default_doit,
 924		.start	= ethnl_default_start,
 925		.dumpit	= ethnl_default_dumpit,
 926		.done	= ethnl_default_done,
 927		.policy = ethnl_eee_get_policy,
 928		.maxattr = ARRAY_SIZE(ethnl_eee_get_policy) - 1,
 929	},
 930	{
 931		.cmd	= ETHTOOL_MSG_EEE_SET,
 932		.flags	= GENL_UNS_ADMIN_PERM,
 933		.doit	= ethnl_set_eee,
 934		.policy = ethnl_eee_set_policy,
 935		.maxattr = ARRAY_SIZE(ethnl_eee_set_policy) - 1,
 936	},
 937	{
 938		.cmd	= ETHTOOL_MSG_TSINFO_GET,
 939		.doit	= ethnl_default_doit,
 940		.start	= ethnl_default_start,
 941		.dumpit	= ethnl_default_dumpit,
 942		.done	= ethnl_default_done,
 943		.policy = ethnl_tsinfo_get_policy,
 944		.maxattr = ARRAY_SIZE(ethnl_tsinfo_get_policy) - 1,
 945	},
 946	{
 947		.cmd	= ETHTOOL_MSG_CABLE_TEST_ACT,
 948		.flags	= GENL_UNS_ADMIN_PERM,
 949		.doit	= ethnl_act_cable_test,
 950		.policy = ethnl_cable_test_act_policy,
 951		.maxattr = ARRAY_SIZE(ethnl_cable_test_act_policy) - 1,
 952	},
 953	{
 954		.cmd	= ETHTOOL_MSG_CABLE_TEST_TDR_ACT,
 955		.flags	= GENL_UNS_ADMIN_PERM,
 956		.doit	= ethnl_act_cable_test_tdr,
 957		.policy = ethnl_cable_test_tdr_act_policy,
 958		.maxattr = ARRAY_SIZE(ethnl_cable_test_tdr_act_policy) - 1,
 959	},
 960	{
 961		.cmd	= ETHTOOL_MSG_TUNNEL_INFO_GET,
 962		.doit	= ethnl_tunnel_info_doit,
 963		.start	= ethnl_tunnel_info_start,
 964		.dumpit	= ethnl_tunnel_info_dumpit,
 965		.policy = ethnl_tunnel_info_get_policy,
 966		.maxattr = ARRAY_SIZE(ethnl_tunnel_info_get_policy) - 1,
 967	},
 968	{
 969		.cmd	= ETHTOOL_MSG_FEC_GET,
 970		.doit	= ethnl_default_doit,
 971		.start	= ethnl_default_start,
 972		.dumpit	= ethnl_default_dumpit,
 973		.done	= ethnl_default_done,
 974		.policy = ethnl_fec_get_policy,
 975		.maxattr = ARRAY_SIZE(ethnl_fec_get_policy) - 1,
 976	},
 977	{
 978		.cmd	= ETHTOOL_MSG_FEC_SET,
 979		.flags	= GENL_UNS_ADMIN_PERM,
 980		.doit	= ethnl_set_fec,
 981		.policy = ethnl_fec_set_policy,
 982		.maxattr = ARRAY_SIZE(ethnl_fec_set_policy) - 1,
 983	},
 984	{
 985		.cmd	= ETHTOOL_MSG_MODULE_EEPROM_GET,
 986		.flags  = GENL_UNS_ADMIN_PERM,
 987		.doit	= ethnl_default_doit,
 988		.start	= ethnl_default_start,
 989		.dumpit	= ethnl_default_dumpit,
 990		.done	= ethnl_default_done,
 991		.policy = ethnl_module_eeprom_get_policy,
 992		.maxattr = ARRAY_SIZE(ethnl_module_eeprom_get_policy) - 1,
 993	},
 994	{
 995		.cmd	= ETHTOOL_MSG_STATS_GET,
 996		.doit	= ethnl_default_doit,
 997		.start	= ethnl_default_start,
 998		.dumpit	= ethnl_default_dumpit,
 999		.done	= ethnl_default_done,
1000		.policy = ethnl_stats_get_policy,
1001		.maxattr = ARRAY_SIZE(ethnl_stats_get_policy) - 1,
1002	},
1003	{
1004		.cmd	= ETHTOOL_MSG_PHC_VCLOCKS_GET,
1005		.doit	= ethnl_default_doit,
1006		.start	= ethnl_default_start,
1007		.dumpit	= ethnl_default_dumpit,
1008		.done	= ethnl_default_done,
1009		.policy = ethnl_phc_vclocks_get_policy,
1010		.maxattr = ARRAY_SIZE(ethnl_phc_vclocks_get_policy) - 1,
1011	},
1012	{
1013		.cmd	= ETHTOOL_MSG_MODULE_GET,
1014		.doit	= ethnl_default_doit,
1015		.start	= ethnl_default_start,
1016		.dumpit	= ethnl_default_dumpit,
1017		.done	= ethnl_default_done,
1018		.policy = ethnl_module_get_policy,
1019		.maxattr = ARRAY_SIZE(ethnl_module_get_policy) - 1,
1020	},
1021	{
1022		.cmd	= ETHTOOL_MSG_MODULE_SET,
1023		.flags	= GENL_UNS_ADMIN_PERM,
1024		.doit	= ethnl_set_module,
1025		.policy = ethnl_module_set_policy,
1026		.maxattr = ARRAY_SIZE(ethnl_module_set_policy) - 1,
1027	},
1028	{
1029		.cmd	= ETHTOOL_MSG_PSE_GET,
1030		.doit	= ethnl_default_doit,
1031		.start	= ethnl_default_start,
1032		.dumpit	= ethnl_default_dumpit,
1033		.done	= ethnl_default_done,
1034		.policy = ethnl_pse_get_policy,
1035		.maxattr = ARRAY_SIZE(ethnl_pse_get_policy) - 1,
1036	},
1037	{
1038		.cmd	= ETHTOOL_MSG_PSE_SET,
1039		.flags	= GENL_UNS_ADMIN_PERM,
1040		.doit	= ethnl_set_pse,
1041		.policy = ethnl_pse_set_policy,
1042		.maxattr = ARRAY_SIZE(ethnl_pse_set_policy) - 1,
1043	},
1044	{
1045		.cmd	= ETHTOOL_MSG_RSS_GET,
1046		.doit	= ethnl_default_doit,
 
 
1047		.policy = ethnl_rss_get_policy,
1048		.maxattr = ARRAY_SIZE(ethnl_rss_get_policy) - 1,
1049	},
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
1050};
1051
1052static const struct genl_multicast_group ethtool_nl_mcgrps[] = {
1053	[ETHNL_MCGRP_MONITOR] = { .name = ETHTOOL_MCGRP_MONITOR_NAME },
1054};
1055
1056static struct genl_family ethtool_genl_family __ro_after_init = {
1057	.name		= ETHTOOL_GENL_NAME,
1058	.version	= ETHTOOL_GENL_VERSION,
1059	.netnsok	= true,
1060	.parallel_ops	= true,
1061	.ops		= ethtool_genl_ops,
1062	.n_ops		= ARRAY_SIZE(ethtool_genl_ops),
1063	.resv_start_op	= ETHTOOL_MSG_MODULE_GET + 1,
1064	.mcgrps		= ethtool_nl_mcgrps,
1065	.n_mcgrps	= ARRAY_SIZE(ethtool_nl_mcgrps),
 
 
1066};
1067
1068/* module setup */
1069
1070static int __init ethnl_init(void)
1071{
1072	int ret;
1073
1074	ret = genl_register_family(&ethtool_genl_family);
1075	if (WARN(ret < 0, "ethtool: genetlink family registration failed"))
1076		return ret;
1077	ethnl_ok = true;
1078
1079	ret = register_netdevice_notifier(&ethnl_netdev_notifier);
1080	WARN(ret < 0, "ethtool: net device notifier registration failed");
1081	return ret;
1082}
1083
1084subsys_initcall(ethnl_init);